ExternalVendorCode/openwrt
1
0
Fork 0
mirror of https://github.com/openwrt/openwrt.git synced 2024-12-27 01:11:14 +00:00
Code Issues Actions 4 Packages Projects Releases Wiki Activity
3d3dad61b2
openwrt/tools/ninja/patches/100-make_jobserver_support.patch
Nick Hainke 58a8ad3801 tools/ninja: update to 1.11.1 
Release Notes:
https://github.com/ninja-build/ninja/releases/tag/v1.11.1

Sync the "100-make_jobserver_support.patch" with the PR:
https://github.com/ninja-build/ninja/pull/1140

Signed-off-by: Nick Hainke <vincent@systemli.org>
2023-01-24 23:13:25 +01:00

2173 lines
63 KiB
Diff
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

From afec30f5caf4b051827ffdd822ebd27c58219fee Mon Sep 17 00:00:00 2001
From: Stefan Becker <stefanb@gpartner-nvidia.com>
Date: Tue, 22 Mar 2016 13:48:07 +0200
Subject: [PATCH 01/11] Add GNU make jobserver client support
- add new TokenPool interface
- GNU make implementation for TokenPool parses and verifies the magic
information from the MAKEFLAGS environment variable
- RealCommandRunner tries to acquire TokenPool
* if no token pool is available then there is no change in behaviour
- When a token pool is available then RealCommandRunner behaviour
changes as follows
* CanRunMore() only returns true if TokenPool::Acquire() returns true
* StartCommand() calls TokenPool::Reserve()
* WaitForCommand() calls TokenPool::Release()
Documentation for GNU make jobserver
http://make.mad-scientist.net/papers/jobserver-implementation/
Fixes https://github.com/ninja-build/ninja/issues/1139
---
configure.py | 2 +
src/build.cc | 63 ++++++++----
src/build.h | 3 +
src/tokenpool-gnu-make.cc | 211 ++++++++++++++++++++++++++++++++++++++
src/tokenpool-none.cc | 27 +++++
src/tokenpool.h | 26 +++++
6 files changed, 310 insertions(+), 22 deletions(-)
create mode 100644 src/tokenpool-gnu-make.cc
create mode 100644 src/tokenpool-none.cc
create mode 100644 src/tokenpool.h
--- a/configure.py
+++ b/configure.py
@@ -517,11 +517,13 @@ for name in ['build',
'state',
'status',
'string_piece_util',
+ 'tokenpool-gnu-make',
'util',
'version']:
objs += cxx(name, variables=cxxvariables)
if platform.is_windows():
for name in ['subprocess-win32',
+ 'tokenpool-gnu-make-win32',
'includes_normalize-win32',
'msvc_helper-win32',
'msvc_helper_main-win32']:
@@ -530,7 +532,9 @@ if platform.is_windows():
objs += cxx('minidump-win32', variables=cxxvariables)
objs += cc('getopt')
else:
- objs += cxx('subprocess-posix')
+ for name in ['subprocess-posix',
+ 'tokenpool-gnu-make-posix']:
+ objs += cxx(name)
if platform.is_aix():
objs += cc('getopt')
if platform.is_msvc():
@@ -588,6 +592,7 @@ for name in ['build_log_test',
'string_piece_util_test',
'subprocess_test',
'test',
+ 'tokenpool_test',
'util_test']:
objs += cxx(name, variables=cxxvariables)
if platform.is_windows():
--- a/src/build.cc
+++ b/src/build.cc
@@ -35,6 +35,7 @@
#include "state.h"
#include "status.h"
#include "subprocess.h"
+#include "tokenpool.h"
#include "util.h"
using namespace std;
@@ -47,8 +48,9 @@ struct DryRunCommandRunner : public Comm
// Overridden from CommandRunner:
virtual bool CanRunMore() const;
+ virtual bool AcquireToken();
virtual bool StartCommand(Edge* edge);
- virtual bool WaitForCommand(Result* result);
+ virtual bool WaitForCommand(Result* result, bool more_ready);
private:
queue<Edge*> finished_;
@@ -58,12 +60,16 @@ bool DryRunCommandRunner::CanRunMore() c
return true;
}
+bool DryRunCommandRunner::AcquireToken() {
+ return true;
+}
+
bool DryRunCommandRunner::StartCommand(Edge* edge) {
finished_.push(edge);
return true;
}
-bool DryRunCommandRunner::WaitForCommand(Result* result) {
+bool DryRunCommandRunner::WaitForCommand(Result* result, bool more_ready) {
if (finished_.empty())
return false;
@@ -149,7 +155,7 @@ void Plan::EdgeWanted(const Edge* edge)
}
Edge* Plan::FindWork() {
- if (ready_.empty())
+ if (!more_ready())
return NULL;
EdgeSet::iterator e = ready_.begin();
Edge* edge = *e;
@@ -448,19 +454,39 @@ void Plan::Dump() const {
}
struct RealCommandRunner : public CommandRunner {
- explicit RealCommandRunner(const BuildConfig& config) : config_(config) {}
- virtual ~RealCommandRunner() {}
+ explicit RealCommandRunner(const BuildConfig& config);
+ virtual ~RealCommandRunner();
virtual bool CanRunMore() const;
+ virtual bool AcquireToken();
virtual bool StartCommand(Edge* edge);
- virtual bool WaitForCommand(Result* result);
+ virtual bool WaitForCommand(Result* result, bool more_ready);
virtual vector<Edge*> GetActiveEdges();
virtual void Abort();
const BuildConfig& config_;
+ // copy of config_.max_load_average; can be modified by TokenPool setup
+ double max_load_average_;
SubprocessSet subprocs_;
+ TokenPool* tokens_;
map<const Subprocess*, Edge*> subproc_to_edge_;
};
+RealCommandRunner::RealCommandRunner(const BuildConfig& config) : config_(config) {
+ max_load_average_ = config.max_load_average;
+ if ((tokens_ = TokenPool::Get()) != NULL) {
+ if (!tokens_->Setup(config_.parallelism_from_cmdline,
+ config_.verbosity == BuildConfig::VERBOSE,
+ max_load_average_)) {
+ delete tokens_;
+ tokens_ = NULL;
+ }
+ }
+}
+
+RealCommandRunner::~RealCommandRunner() {
+ delete tokens_;
+}
+
vector<Edge*> RealCommandRunner::GetActiveEdges() {
vector<Edge*> edges;
for (map<const Subprocess*, Edge*>::iterator e = subproc_to_edge_.begin();
@@ -471,14 +497,23 @@ vector<Edge*> RealCommandRunner::GetActi
void RealCommandRunner::Abort() {
subprocs_.Clear();
+ if (tokens_)
+ tokens_->Clear();
}
bool RealCommandRunner::CanRunMore() const {
- size_t subproc_number =
- subprocs_.running_.size() + subprocs_.finished_.size();
- return (int)subproc_number < config_.parallelism
- && ((subprocs_.running_.empty() || config_.max_load_average <= 0.0f)
- || GetLoadAverage() < config_.max_load_average);
+ bool parallelism_limit_not_reached =
+ tokens_ || // ignore config_.parallelism
+ ((int) (subprocs_.running_.size() +
+ subprocs_.finished_.size()) < config_.parallelism);
+ return parallelism_limit_not_reached
+ && (subprocs_.running_.empty() ||
+ (max_load_average_ <= 0.0f ||
+ GetLoadAverage() < max_load_average_));
+}
+
+bool RealCommandRunner::AcquireToken() {
+ return (!tokens_ || tokens_->Acquire());
}
bool RealCommandRunner::StartCommand(Edge* edge) {
@@ -486,19 +521,33 @@ bool RealCommandRunner::StartCommand(Edg
Subprocess* subproc = subprocs_.Add(command, edge->use_console());
if (!subproc)
return false;
+ if (tokens_)
+ tokens_->Reserve();
subproc_to_edge_.insert(make_pair(subproc, edge));
return true;
}
-bool RealCommandRunner::WaitForCommand(Result* result) {
+bool RealCommandRunner::WaitForCommand(Result* result, bool more_ready) {
Subprocess* subproc;
- while ((subproc = subprocs_.NextFinished()) == NULL) {
- bool interrupted = subprocs_.DoWork();
+ subprocs_.ResetTokenAvailable();
+ while (((subproc = subprocs_.NextFinished()) == NULL) &&
+ !subprocs_.IsTokenAvailable()) {
+ bool interrupted = subprocs_.DoWork(more_ready ? tokens_ : NULL);
if (interrupted)
return false;
}
+ // token became available
+ if (subproc == NULL) {
+ result->status = ExitTokenAvailable;
+ return true;
+ }
+
+ // command completed
+ if (tokens_)
+ tokens_->Release();
+
result->status = subproc->Finish();
result->output = subproc->GetOutput();
@@ -620,38 +669,43 @@ bool Builder::Build(string* err) {
// command runner.
// Second, we attempt to wait for / reap the next finished command.
while (plan_.more_to_do()) {
- // See if we can start any more commands.
- if (failures_allowed && command_runner_->CanRunMore()) {
- if (Edge* edge = plan_.FindWork()) {
- if (edge->GetBindingBool("generator")) {
+ // See if we can start any more commands...
+ bool can_run_more =
+ failures_allowed &&
+ plan_.more_ready() &&
+ command_runner_->CanRunMore();
+
+ // ... but we also need a token to do that.
+ if (can_run_more && command_runner_->AcquireToken()) {
+ Edge* edge = plan_.FindWork();
+ if (edge->GetBindingBool("generator")) {
scan_.build_log()->Close();
}
- if (!StartEdge(edge, err)) {
+ if (!StartEdge(edge, err)) {
+ Cleanup();
+ status_->BuildFinished();
+ return false;
+ }
+
+ if (edge->is_phony()) {
+ if (!plan_.EdgeFinished(edge, Plan::kEdgeSucceeded, err)) {
Cleanup();
status_->BuildFinished();
return false;
}
-
- if (edge->is_phony()) {
- if (!plan_.EdgeFinished(edge, Plan::kEdgeSucceeded, err)) {
- Cleanup();
- status_->BuildFinished();
- return false;
- }
- } else {
- ++pending_commands;
- }
-
- // We made some progress; go back to the main loop.
- continue;
+ } else {
+ ++pending_commands;
}
+
+ // We made some progress; go back to the main loop.
+ continue;
}
// See if we can reap any finished commands.
if (pending_commands) {
CommandRunner::Result result;
- if (!command_runner_->WaitForCommand(&result) ||
+ if (!command_runner_->WaitForCommand(&result, can_run_more) ||
result.status == ExitInterrupted) {
Cleanup();
status_->BuildFinished();
@@ -659,6 +713,10 @@ bool Builder::Build(string* err) {
return false;
}
+ // We might be able to start another command; start the main loop over.
+ if (result.status == ExitTokenAvailable)
+ continue;
+
--pending_commands;
if (!FinishCommand(&result, err)) {
Cleanup();
--- a/src/build.h
+++ b/src/build.h
@@ -52,6 +52,9 @@ struct Plan {
/// Returns true if there's more work to be done.
bool more_to_do() const { return wanted_edges_ > 0 && command_edges_ > 0; }
+ /// Returns true if there's more edges ready to start
+ bool more_ready() const { return !ready_.empty(); }
+
/// Dumps the current state of the plan.
void Dump() const;
@@ -136,6 +139,7 @@ private:
struct CommandRunner {
virtual ~CommandRunner() {}
virtual bool CanRunMore() const = 0;
+ virtual bool AcquireToken() = 0;
virtual bool StartCommand(Edge* edge) = 0;
/// The result of waiting for a command.
@@ -147,7 +151,9 @@ struct CommandRunner {
bool success() const { return status == ExitSuccess; }
};
/// Wait for a command to complete, or return false if interrupted.
- virtual bool WaitForCommand(Result* result) = 0;
+ /// If more_ready is true then the optional TokenPool is monitored too
+ /// and we return when a token becomes available.
+ virtual bool WaitForCommand(Result* result, bool more_ready) = 0;
virtual std::vector<Edge*> GetActiveEdges() { return std::vector<Edge*>(); }
virtual void Abort() {}
@@ -155,7 +161,8 @@ struct CommandRunner {
/// Options (e.g. verbosity, parallelism) passed to a build.
struct BuildConfig {
- BuildConfig() : verbosity(NORMAL), dry_run(false), parallelism(1),
+ BuildConfig() : verbosity(NORMAL), dry_run(false),
+ parallelism(1), parallelism_from_cmdline(false),
failures_allowed(1), max_load_average(-0.0f) {}
enum Verbosity {
@@ -167,6 +174,7 @@ struct BuildConfig {
Verbosity verbosity;
bool dry_run;
int parallelism;
+ bool parallelism_from_cmdline;
int failures_allowed;
/// The maximum load average we must not exceed. A negative value
/// means that we do not have any limit.
--- /dev/null
+++ b/src/tokenpool-gnu-make.cc
@@ -0,0 +1,108 @@
+// Copyright 2016-2018 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "tokenpool-gnu-make.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "line_printer.h"
+
+// TokenPool implementation for GNU make jobserver - common bits
+// every instance owns an implicit token -> available_ == 1
+GNUmakeTokenPool::GNUmakeTokenPool() : available_(1), used_(0) {
+}
+
+GNUmakeTokenPool::~GNUmakeTokenPool() {
+}
+
+bool GNUmakeTokenPool::Setup(bool ignore,
+ bool verbose,
+ double& max_load_average) {
+ const char* value = GetEnv("MAKEFLAGS");
+ if (!value)
+ return false;
+
+ // GNU make <= 4.1
+ const char* jobserver = strstr(value, "--jobserver-fds=");
+ if (!jobserver)
+ // GNU make => 4.2
+ jobserver = strstr(value, "--jobserver-auth=");
+ if (jobserver) {
+ LinePrinter printer;
+
+ if (ignore) {
+ printer.PrintOnNewLine("ninja: warning: -jN forced on command line; ignoring GNU make jobserver.\n");
+ } else {
+ if (ParseAuth(jobserver)) {
+ const char* l_arg = strstr(value, " -l");
+ int load_limit = -1;
+
+ if (verbose) {
+ printer.PrintOnNewLine("ninja: using GNU make jobserver.\n");
+ }
+
+ // translate GNU make -lN to ninja -lN
+ if (l_arg &&
+ (sscanf(l_arg + 3, "%d ", &load_limit) == 1) &&
+ (load_limit > 0)) {
+ max_load_average = load_limit;
+ }
+
+ return true;
+ }
+ }
+ }
+
+ return false;
+}
+
+bool GNUmakeTokenPool::Acquire() {
+ if (available_ > 0)
+ return true;
+
+ if (AcquireToken()) {
+ // token acquired
+ available_++;
+ return true;
+ }
+
+ // no token available
+ return false;
+}
+
+void GNUmakeTokenPool::Reserve() {
+ available_--;
+ used_++;
+}
+
+void GNUmakeTokenPool::Return() {
+ if (ReturnToken())
+ available_--;
+}
+
+void GNUmakeTokenPool::Release() {
+ available_++;
+ used_--;
+ if (available_ > 1)
+ Return();
+}
+
+void GNUmakeTokenPool::Clear() {
+ while (used_ > 0)
+ Release();
+ while (available_ > 1)
+ Return();
+}
--- /dev/null
+++ b/src/tokenpool.h
@@ -0,0 +1,42 @@
+// Copyright 2016-2018 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifdef _WIN32
+#include <windows.h>
+#endif
+
+// interface to token pool
+struct TokenPool {
+ virtual ~TokenPool() {}
+
+ virtual bool Acquire() = 0;
+ virtual void Reserve() = 0;
+ virtual void Release() = 0;
+ virtual void Clear() = 0;
+
+ // returns false if token pool setup failed
+ virtual bool Setup(bool ignore, bool verbose, double& max_load_average) = 0;
+
+#ifdef _WIN32
+ virtual void WaitForTokenAvailability(HANDLE ioport) = 0;
+ // returns true if a token has become available
+ // key is result from GetQueuedCompletionStatus()
+ virtual bool TokenIsAvailable(ULONG_PTR key) = 0;
+#else
+ virtual int GetMonitorFd() = 0;
+#endif
+
+ // returns NULL if token pool is not available
+ static TokenPool* Get();
+};
--- a/src/build_test.cc
+++ b/src/build_test.cc
@@ -15,6 +15,7 @@
#include "build.h"
#include <assert.h>
+#include <stdarg.h>
#include "build_log.h"
#include "deps_log.h"
@@ -474,8 +475,9 @@ struct FakeCommandRunner : public Comman
// CommandRunner impl
virtual bool CanRunMore() const;
+ virtual bool AcquireToken();
virtual bool StartCommand(Edge* edge);
- virtual bool WaitForCommand(Result* result);
+ virtual bool WaitForCommand(Result* result, bool more_ready);
virtual vector<Edge*> GetActiveEdges();
virtual void Abort();
@@ -578,6 +580,10 @@ bool FakeCommandRunner::CanRunMore() con
return active_edges_.size() < max_active_edges_;
}
+bool FakeCommandRunner::AcquireToken() {
+ return true;
+}
+
bool FakeCommandRunner::StartCommand(Edge* edge) {
assert(active_edges_.size() < max_active_edges_);
assert(find(active_edges_.begin(), active_edges_.end(), edge)
@@ -649,7 +655,7 @@ bool FakeCommandRunner::StartCommand(Edg
return true;
}
-bool FakeCommandRunner::WaitForCommand(Result* result) {
+bool FakeCommandRunner::WaitForCommand(Result* result, bool more_ready) {
if (active_edges_.empty())
return false;
@@ -3985,3 +3991,356 @@ TEST_F(BuildTest, ValidationWithCircular
EXPECT_FALSE(builder_.AddTarget("out", &err));
EXPECT_EQ("dependency cycle: validate -> validate_in -> validate", err);
}
+
+/// The token tests are concerned with the main loop functionality when
+// the CommandRunner has an active TokenPool. It is therefore intentional
+// that the plan doesn't complete and that builder_.Build() returns false!
+
+/// Fake implementation of CommandRunner that simulates a TokenPool
+struct FakeTokenCommandRunner : public CommandRunner {
+ explicit FakeTokenCommandRunner() {}
+
+ // CommandRunner impl
+ virtual bool CanRunMore() const;
+ virtual bool AcquireToken();
+ virtual bool StartCommand(Edge* edge);
+ virtual bool WaitForCommand(Result* result, bool more_ready);
+ virtual vector<Edge*> GetActiveEdges();
+ virtual void Abort();
+
+ vector<string> commands_ran_;
+ vector<Edge *> edges_;
+
+ vector<bool> acquire_token_;
+ vector<bool> can_run_more_;
+ vector<bool> wait_for_command_;
+};
+
+bool FakeTokenCommandRunner::CanRunMore() const {
+ if (can_run_more_.size() == 0) {
+ EXPECT_FALSE("unexpected call to CommandRunner::CanRunMore()");
+ return false;
+ }
+
+ bool result = can_run_more_[0];
+
+ // Unfortunately CanRunMore() isn't "const" for tests
+ const_cast<FakeTokenCommandRunner*>(this)->can_run_more_.erase(
+ const_cast<FakeTokenCommandRunner*>(this)->can_run_more_.begin()
+ );
+
+ return result;
+}
+
+bool FakeTokenCommandRunner::AcquireToken() {
+ if (acquire_token_.size() == 0) {
+ EXPECT_FALSE("unexpected call to CommandRunner::AcquireToken()");
+ return false;
+ }
+
+ bool result = acquire_token_[0];
+ acquire_token_.erase(acquire_token_.begin());
+ return result;
+}
+
+bool FakeTokenCommandRunner::StartCommand(Edge* edge) {
+ commands_ran_.push_back(edge->EvaluateCommand());
+ edges_.push_back(edge);
+ return true;
+}
+
+bool FakeTokenCommandRunner::WaitForCommand(Result* result, bool more_ready) {
+ if (wait_for_command_.size() == 0) {
+ EXPECT_FALSE("unexpected call to CommandRunner::WaitForCommand()");
+ return false;
+ }
+
+ bool expected = wait_for_command_[0];
+ if (expected != more_ready) {
+ EXPECT_EQ(expected, more_ready);
+ return false;
+ }
+ wait_for_command_.erase(wait_for_command_.begin());
+
+ if (edges_.size() == 0)
+ return false;
+
+ Edge* edge = edges_[0];
+ result->edge = edge;
+
+ if (more_ready &&
+ (edge->rule().name() == "token-available")) {
+ result->status = ExitTokenAvailable;
+ } else {
+ edges_.erase(edges_.begin());
+ result->status = ExitSuccess;
+ }
+
+ return true;
+}
+
+vector<Edge*> FakeTokenCommandRunner::GetActiveEdges() {
+ return edges_;
+}
+
+void FakeTokenCommandRunner::Abort() {
+ edges_.clear();
+}
+
+struct BuildTokenTest : public BuildTest {
+ virtual void SetUp();
+ virtual void TearDown();
+
+ FakeTokenCommandRunner token_command_runner_;
+
+ void ExpectAcquireToken(int count, ...);
+ void ExpectCanRunMore(int count, ...);
+ void ExpectWaitForCommand(int count, ...);
+
+private:
+ void EnqueueBooleans(vector<bool>& booleans, int count, va_list ap);
+};
+
+void BuildTokenTest::SetUp() {
+ BuildTest::SetUp();
+
+ // replace FakeCommandRunner with FakeTokenCommandRunner
+ builder_.command_runner_.release();
+ builder_.command_runner_.reset(&token_command_runner_);
+}
+void BuildTokenTest::TearDown() {
+ EXPECT_EQ(0u, token_command_runner_.acquire_token_.size());
+ EXPECT_EQ(0u, token_command_runner_.can_run_more_.size());
+ EXPECT_EQ(0u, token_command_runner_.wait_for_command_.size());
+
+ BuildTest::TearDown();
+}
+
+void BuildTokenTest::ExpectAcquireToken(int count, ...) {
+ va_list ap;
+ va_start(ap, count);
+ EnqueueBooleans(token_command_runner_.acquire_token_, count, ap);
+ va_end(ap);
+}
+
+void BuildTokenTest::ExpectCanRunMore(int count, ...) {
+ va_list ap;
+ va_start(ap, count);
+ EnqueueBooleans(token_command_runner_.can_run_more_, count, ap);
+ va_end(ap);
+}
+
+void BuildTokenTest::ExpectWaitForCommand(int count, ...) {
+ va_list ap;
+ va_start(ap, count);
+ EnqueueBooleans(token_command_runner_.wait_for_command_, count, ap);
+ va_end(ap);
+}
+
+void BuildTokenTest::EnqueueBooleans(vector<bool>& booleans, int count, va_list ap) {
+ while (count--) {
+ int value = va_arg(ap, int);
+ booleans.push_back(!!value); // force bool
+ }
+}
+
+TEST_F(BuildTokenTest, DoNotAquireToken) {
+ // plan should execute one command
+ string err;
+ EXPECT_TRUE(builder_.AddTarget("cat1", &err));
+ ASSERT_EQ("", err);
+
+ // pretend we can't run anything
+ ExpectCanRunMore(1, false);
+
+ EXPECT_FALSE(builder_.Build(&err));
+ EXPECT_EQ("stuck [this is a bug]", err);
+
+ EXPECT_EQ(0u, token_command_runner_.commands_ran_.size());
+}
+
+TEST_F(BuildTokenTest, DoNotStartWithoutToken) {
+ // plan should execute one command
+ string err;
+ EXPECT_TRUE(builder_.AddTarget("cat1", &err));
+ ASSERT_EQ("", err);
+
+ // we could run a command but do not have a token for it
+ ExpectCanRunMore(1, true);
+ ExpectAcquireToken(1, false);
+
+ EXPECT_FALSE(builder_.Build(&err));
+ EXPECT_EQ("stuck [this is a bug]", err);
+
+ EXPECT_EQ(0u, token_command_runner_.commands_ran_.size());
+}
+
+TEST_F(BuildTokenTest, CompleteOneStep) {
+ // plan should execute one command
+ string err;
+ EXPECT_TRUE(builder_.AddTarget("cat1", &err));
+ ASSERT_EQ("", err);
+
+ // allow running of one command
+ ExpectCanRunMore(1, true);
+ ExpectAcquireToken(1, true);
+ // block and wait for command to finalize
+ ExpectWaitForCommand(1, false);
+
+ EXPECT_TRUE(builder_.Build(&err));
+ EXPECT_EQ("", err);
+
+ EXPECT_EQ(1u, token_command_runner_.commands_ran_.size());
+ EXPECT_TRUE(token_command_runner_.commands_ran_[0] == "cat in1 > cat1");
+}
+
+TEST_F(BuildTokenTest, AcquireOneToken) {
+ // plan should execute more than one command
+ string err;
+ EXPECT_TRUE(builder_.AddTarget("cat12", &err));
+ ASSERT_EQ("", err);
+
+ // allow running of one command
+ ExpectCanRunMore(3, true, false, false);
+ ExpectAcquireToken(1, true);
+ // block and wait for command to finalize
+ ExpectWaitForCommand(1, false);
+
+ EXPECT_FALSE(builder_.Build(&err));
+ EXPECT_EQ("stuck [this is a bug]", err);
+
+ EXPECT_EQ(1u, token_command_runner_.commands_ran_.size());
+ // any of the two dependencies could have been executed
+ EXPECT_TRUE(token_command_runner_.commands_ran_[0] == "cat in1 > cat1" ||
+ token_command_runner_.commands_ran_[0] == "cat in1 in2 > cat2");
+}
+
+TEST_F(BuildTokenTest, WantTwoTokens) {
+ // plan should execute more than one command
+ string err;
+ EXPECT_TRUE(builder_.AddTarget("cat12", &err));
+ ASSERT_EQ("", err);
+
+ // allow running of one command
+ ExpectCanRunMore(3, true, true, false);
+ ExpectAcquireToken(2, true, false);
+ // wait for command to finalize or token to become available
+ ExpectWaitForCommand(1, true);
+
+ EXPECT_FALSE(builder_.Build(&err));
+ EXPECT_EQ("stuck [this is a bug]", err);
+
+ EXPECT_EQ(1u, token_command_runner_.commands_ran_.size());
+ // any of the two dependencies could have been executed
+ EXPECT_TRUE(token_command_runner_.commands_ran_[0] == "cat in1 > cat1" ||
+ token_command_runner_.commands_ran_[0] == "cat in1 in2 > cat2");
+}
+
+TEST_F(BuildTokenTest, CompleteTwoSteps) {
+ ASSERT_NO_FATAL_FAILURE(AssertParse(&state_,
+"build out1: cat in1\n"
+"build out2: cat out1\n"));
+
+ // plan should execute more than one command
+ string err;
+ EXPECT_TRUE(builder_.AddTarget("out2", &err));
+ ASSERT_EQ("", err);
+
+ // allow running of two commands
+ ExpectCanRunMore(2, true, true);
+ ExpectAcquireToken(2, true, true);
+ // wait for commands to finalize
+ ExpectWaitForCommand(2, false, false);
+
+ EXPECT_TRUE(builder_.Build(&err));
+ EXPECT_EQ("", err);
+
+ EXPECT_EQ(2u, token_command_runner_.commands_ran_.size());
+ EXPECT_TRUE(token_command_runner_.commands_ran_[0] == "cat in1 > out1");
+ EXPECT_TRUE(token_command_runner_.commands_ran_[1] == "cat out1 > out2");
+}
+
+TEST_F(BuildTokenTest, TwoCommandsInParallel) {
+ ASSERT_NO_FATAL_FAILURE(AssertParse(&state_,
+"rule token-available\n"
+" command = cat $in > $out\n"
+"build out1: token-available in1\n"
+"build out2: token-available in2\n"
+"build out12: cat out1 out2\n"));
+
+ // plan should execute more than one command
+ string err;
+ EXPECT_TRUE(builder_.AddTarget("out12", &err));
+ ASSERT_EQ("", err);
+
+ // 1st command: token available -> allow running
+ // 2nd command: no token available but becomes available later
+ ExpectCanRunMore(4, true, true, true, false);
+ ExpectAcquireToken(3, true, false, true);
+ // 1st call waits for command to finalize or token to become available
+ // 2nd call waits for command to finalize
+ // 3rd call waits for command to finalize
+ ExpectWaitForCommand(3, true, false, false);
+
+ EXPECT_FALSE(builder_.Build(&err));
+ EXPECT_EQ("stuck [this is a bug]", err);
+
+ EXPECT_EQ(2u, token_command_runner_.commands_ran_.size());
+ EXPECT_TRUE((token_command_runner_.commands_ran_[0] == "cat in1 > out1" &&
+ token_command_runner_.commands_ran_[1] == "cat in2 > out2") ||
+ (token_command_runner_.commands_ran_[0] == "cat in2 > out2" &&
+ token_command_runner_.commands_ran_[1] == "cat in1 > out1"));
+}
+
+TEST_F(BuildTokenTest, CompleteThreeStepsSerial) {
+ // plan should execute more than one command
+ string err;
+ EXPECT_TRUE(builder_.AddTarget("cat12", &err));
+ ASSERT_EQ("", err);
+
+ // allow running of all commands
+ ExpectCanRunMore(4, true, true, true, true);
+ ExpectAcquireToken(4, true, false, true, true);
+ // wait for commands to finalize
+ ExpectWaitForCommand(3, true, false, false);
+
+ EXPECT_TRUE(builder_.Build(&err));
+ EXPECT_EQ("", err);
+
+ EXPECT_EQ(3u, token_command_runner_.commands_ran_.size());
+ EXPECT_TRUE((token_command_runner_.commands_ran_[0] == "cat in1 > cat1" &&
+ token_command_runner_.commands_ran_[1] == "cat in1 in2 > cat2") ||
+ (token_command_runner_.commands_ran_[0] == "cat in1 in2 > cat2" &&
+ token_command_runner_.commands_ran_[1] == "cat in1 > cat1" ));
+ EXPECT_TRUE(token_command_runner_.commands_ran_[2] == "cat cat1 cat2 > cat12");
+}
+
+TEST_F(BuildTokenTest, CompleteThreeStepsParallel) {
+ ASSERT_NO_FATAL_FAILURE(AssertParse(&state_,
+"rule token-available\n"
+" command = cat $in > $out\n"
+"build out1: token-available in1\n"
+"build out2: token-available in2\n"
+"build out12: cat out1 out2\n"));
+
+ // plan should execute more than one command
+ string err;
+ EXPECT_TRUE(builder_.AddTarget("out12", &err));
+ ASSERT_EQ("", err);
+
+ // allow running of all commands
+ ExpectCanRunMore(4, true, true, true, true);
+ ExpectAcquireToken(4, true, false, true, true);
+ // wait for commands to finalize
+ ExpectWaitForCommand(4, true, false, false, false);
+
+ EXPECT_TRUE(builder_.Build(&err));
+ EXPECT_EQ("", err);
+
+ EXPECT_EQ(3u, token_command_runner_.commands_ran_.size());
+ EXPECT_TRUE((token_command_runner_.commands_ran_[0] == "cat in1 > out1" &&
+ token_command_runner_.commands_ran_[1] == "cat in2 > out2") ||
+ (token_command_runner_.commands_ran_[0] == "cat in2 > out2" &&
+ token_command_runner_.commands_ran_[1] == "cat in1 > out1"));
+ EXPECT_TRUE(token_command_runner_.commands_ran_[2] == "cat out1 out2 > out12");
+}
--- a/src/exit_status.h
+++ b/src/exit_status.h
@@ -18,7 +18,8 @@
enum ExitStatus {
ExitSuccess,
ExitFailure,
- ExitInterrupted
+ ExitTokenAvailable,
+ ExitInterrupted,
};
#endif // NINJA_EXIT_STATUS_H_
--- a/src/subprocess-posix.cc
+++ b/src/subprocess-posix.cc
@@ -13,6 +13,7 @@
// limitations under the License.
#include "subprocess.h"
+#include "tokenpool.h"
#include <sys/select.h>
#include <assert.h>
@@ -249,7 +250,7 @@ Subprocess *SubprocessSet::Add(const str
}
#ifdef USE_PPOLL
-bool SubprocessSet::DoWork() {
+bool SubprocessSet::DoWork(TokenPool* tokens) {
vector<pollfd> fds;
nfds_t nfds = 0;
@@ -263,6 +264,12 @@ bool SubprocessSet::DoWork() {
++nfds;
}
+ if (tokens) {
+ pollfd pfd = { tokens->GetMonitorFd(), POLLIN | POLLPRI, 0 };
+ fds.push_back(pfd);
+ ++nfds;
+ }
+
interrupted_ = 0;
int ret = ppoll(&fds.front(), nfds, NULL, &old_mask_);
if (ret == -1) {
@@ -295,11 +302,20 @@ bool SubprocessSet::DoWork() {
++i;
}
+ if (tokens) {
+ pollfd *pfd = &fds[nfds - 1];
+ if (pfd->fd >= 0) {
+ assert(pfd->fd == tokens->GetMonitorFd());
+ if (pfd->revents != 0)
+ token_available_ = true;
+ }
+ }
+
return IsInterrupted();
}
#else // !defined(USE_PPOLL)
-bool SubprocessSet::DoWork() {
+bool SubprocessSet::DoWork(TokenPool* tokens) {
fd_set set;
int nfds = 0;
FD_ZERO(&set);
@@ -314,6 +330,13 @@ bool SubprocessSet::DoWork() {
}
}
+ if (tokens) {
+ int fd = tokens->GetMonitorFd();
+ FD_SET(fd, &set);
+ if (nfds < fd+1)
+ nfds = fd+1;
+ }
+
interrupted_ = 0;
int ret = pselect(nfds, &set, 0, 0, 0, &old_mask_);
if (ret == -1) {
@@ -342,6 +365,12 @@ bool SubprocessSet::DoWork() {
++i;
}
+ if (tokens) {
+ int fd = tokens->GetMonitorFd();
+ if ((fd >= 0) && FD_ISSET(fd, &set))
+ token_available_ = true;
+ }
+
return IsInterrupted();
}
#endif // !defined(USE_PPOLL)
--- a/src/subprocess-win32.cc
+++ b/src/subprocess-win32.cc
@@ -13,6 +13,7 @@
// limitations under the License.
#include "subprocess.h"
+#include "tokenpool.h"
#include <assert.h>
#include <stdio.h>
@@ -251,11 +252,14 @@ Subprocess *SubprocessSet::Add(const str
return subprocess;
}
-bool SubprocessSet::DoWork() {
+bool SubprocessSet::DoWork(TokenPool* tokens) {
DWORD bytes_read;
Subprocess* subproc;
OVERLAPPED* overlapped;
+ if (tokens)
+ tokens->WaitForTokenAvailability(ioport_);
+
if (!GetQueuedCompletionStatus(ioport_, &bytes_read, (PULONG_PTR)&subproc,
&overlapped, INFINITE)) {
if (GetLastError() != ERROR_BROKEN_PIPE)
@@ -266,6 +270,11 @@ bool SubprocessSet::DoWork() {
// delivered by NotifyInterrupted above.
return true;
+ if (tokens && tokens->TokenIsAvailable((ULONG_PTR)subproc)) {
+ token_available_ = true;
+ return false;
+ }
+
subproc->OnPipeReady();
if (subproc->Done()) {
--- a/src/subprocess.h
+++ b/src/subprocess.h
@@ -76,6 +76,8 @@ struct Subprocess {
friend struct SubprocessSet;
};
+struct TokenPool;
+
/// SubprocessSet runs a ppoll/pselect() loop around a set of Subprocesses.
/// DoWork() waits for any state change in subprocesses; finished_
/// is a queue of subprocesses as they finish.
@@ -84,13 +86,17 @@ struct SubprocessSet {
~SubprocessSet();
Subprocess* Add(const std::string& command, bool use_console = false);
- bool DoWork();
+ bool DoWork(TokenPool* tokens);
Subprocess* NextFinished();
void Clear();
std::vector<Subprocess*> running_;
std::queue<Subprocess*> finished_;
+ bool token_available_;
+ bool IsTokenAvailable() { return token_available_; }
+ void ResetTokenAvailable() { token_available_ = false; }
+
#ifdef _WIN32
static BOOL WINAPI NotifyInterrupted(DWORD dwCtrlType);
static HANDLE ioport_;
--- a/src/subprocess_test.cc
+++ b/src/subprocess_test.cc
@@ -13,6 +13,7 @@
// limitations under the License.
#include "subprocess.h"
+#include "tokenpool.h"
#include "test.h"
@@ -34,8 +35,30 @@ const char* kSimpleCommand = "cmd /c dir
const char* kSimpleCommand = "ls /";
#endif
+struct TestTokenPool : public TokenPool {
+ bool Acquire() { return false; }
+ void Reserve() {}
+ void Release() {}
+ void Clear() {}
+ bool Setup(bool ignore_unused, bool verbose, double& max_load_average) { return false; }
+
+#ifdef _WIN32
+ bool _token_available;
+ void WaitForTokenAvailability(HANDLE ioport) {
+ if (_token_available)
+ // unblock GetQueuedCompletionStatus()
+ PostQueuedCompletionStatus(ioport, 0, (ULONG_PTR) this, NULL);
+ }
+ bool TokenIsAvailable(ULONG_PTR key) { return key == (ULONG_PTR) this; }
+#else
+ int _fd;
+ int GetMonitorFd() { return _fd; }
+#endif
+};
+
struct SubprocessTest : public testing::Test {
SubprocessSet subprocs_;
+ TestTokenPool tokens_;
};
} // anonymous namespace
@@ -45,10 +68,12 @@ TEST_F(SubprocessTest, BadCommandStderr)
Subprocess* subproc = subprocs_.Add("cmd /c ninja_no_such_command");
ASSERT_NE((Subprocess *) 0, subproc);
+ subprocs_.ResetTokenAvailable();
while (!subproc->Done()) {
// Pretend we discovered that stderr was ready for writing.
- subprocs_.DoWork();
+ subprocs_.DoWork(NULL);
}
+ ASSERT_FALSE(subprocs_.IsTokenAvailable());
EXPECT_EQ(ExitFailure, subproc->Finish());
EXPECT_NE("", subproc->GetOutput());
@@ -59,10 +84,12 @@ TEST_F(SubprocessTest, NoSuchCommand) {
Subprocess* subproc = subprocs_.Add("ninja_no_such_command");
ASSERT_NE((Subprocess *) 0, subproc);
+ subprocs_.ResetTokenAvailable();
while (!subproc->Done()) {
// Pretend we discovered that stderr was ready for writing.
- subprocs_.DoWork();
+ subprocs_.DoWork(NULL);
}
+ ASSERT_FALSE(subprocs_.IsTokenAvailable());
EXPECT_EQ(ExitFailure, subproc->Finish());
EXPECT_NE("", subproc->GetOutput());
@@ -78,9 +105,11 @@ TEST_F(SubprocessTest, InterruptChild) {
Subprocess* subproc = subprocs_.Add("kill -INT $$");
ASSERT_NE((Subprocess *) 0, subproc);
+ subprocs_.ResetTokenAvailable();
while (!subproc->Done()) {
- subprocs_.DoWork();
+ subprocs_.DoWork(NULL);
}
+ ASSERT_FALSE(subprocs_.IsTokenAvailable());
EXPECT_EQ(ExitInterrupted, subproc->Finish());
}
@@ -90,7 +119,7 @@ TEST_F(SubprocessTest, InterruptParent)
ASSERT_NE((Subprocess *) 0, subproc);
while (!subproc->Done()) {
- bool interrupted = subprocs_.DoWork();
+ bool interrupted = subprocs_.DoWork(NULL);
if (interrupted)
return;
}
@@ -102,9 +131,11 @@ TEST_F(SubprocessTest, InterruptChildWit
Subprocess* subproc = subprocs_.Add("kill -TERM $$");
ASSERT_NE((Subprocess *) 0, subproc);
+ subprocs_.ResetTokenAvailable();
while (!subproc->Done()) {
- subprocs_.DoWork();
+ subprocs_.DoWork(NULL);
}
+ ASSERT_FALSE(subprocs_.IsTokenAvailable());
EXPECT_EQ(ExitInterrupted, subproc->Finish());
}
@@ -114,7 +145,7 @@ TEST_F(SubprocessTest, InterruptParentWi
ASSERT_NE((Subprocess *) 0, subproc);
while (!subproc->Done()) {
- bool interrupted = subprocs_.DoWork();
+ bool interrupted = subprocs_.DoWork(NULL);
if (interrupted)
return;
}
@@ -126,9 +157,11 @@ TEST_F(SubprocessTest, InterruptChildWit
Subprocess* subproc = subprocs_.Add("kill -HUP $$");
ASSERT_NE((Subprocess *) 0, subproc);
+ subprocs_.ResetTokenAvailable();
while (!subproc->Done()) {
- subprocs_.DoWork();
+ subprocs_.DoWork(NULL);
}
+ ASSERT_FALSE(subprocs_.IsTokenAvailable());
EXPECT_EQ(ExitInterrupted, subproc->Finish());
}
@@ -138,7 +171,7 @@ TEST_F(SubprocessTest, InterruptParentWi
ASSERT_NE((Subprocess *) 0, subproc);
while (!subproc->Done()) {
- bool interrupted = subprocs_.DoWork();
+ bool interrupted = subprocs_.DoWork(NULL);
if (interrupted)
return;
}
@@ -153,9 +186,11 @@ TEST_F(SubprocessTest, Console) {
subprocs_.Add("test -t 0 -a -t 1 -a -t 2", /*use_console=*/true);
ASSERT_NE((Subprocess*)0, subproc);
+ subprocs_.ResetTokenAvailable();
while (!subproc->Done()) {
- subprocs_.DoWork();
+ subprocs_.DoWork(NULL);
}
+ ASSERT_FALSE(subprocs_.IsTokenAvailable());
EXPECT_EQ(ExitSuccess, subproc->Finish());
}
@@ -167,9 +202,11 @@ TEST_F(SubprocessTest, SetWithSingle) {
Subprocess* subproc = subprocs_.Add(kSimpleCommand);
ASSERT_NE((Subprocess *) 0, subproc);
+ subprocs_.ResetTokenAvailable();
while (!subproc->Done()) {
- subprocs_.DoWork();
+ subprocs_.DoWork(NULL);
}
+ ASSERT_FALSE(subprocs_.IsTokenAvailable());
ASSERT_EQ(ExitSuccess, subproc->Finish());
ASSERT_NE("", subproc->GetOutput());
@@ -200,12 +237,13 @@ TEST_F(SubprocessTest, SetWithMulti) {
ASSERT_EQ("", processes[i]->GetOutput());
}
+ subprocs_.ResetTokenAvailable();
while (!processes[0]->Done() || !processes[1]->Done() ||
!processes[2]->Done()) {
ASSERT_GT(subprocs_.running_.size(), 0u);
- subprocs_.DoWork();
+ subprocs_.DoWork(NULL);
}
-
+ ASSERT_FALSE(subprocs_.IsTokenAvailable());
ASSERT_EQ(0u, subprocs_.running_.size());
ASSERT_EQ(3u, subprocs_.finished_.size());
@@ -237,8 +275,10 @@ TEST_F(SubprocessTest, SetWithLots) {
ASSERT_NE((Subprocess *) 0, subproc);
procs.push_back(subproc);
}
+ subprocs_.ResetTokenAvailable();
while (!subprocs_.running_.empty())
- subprocs_.DoWork();
+ subprocs_.DoWork(NULL);
+ ASSERT_FALSE(subprocs_.IsTokenAvailable());
for (size_t i = 0; i < procs.size(); ++i) {
ASSERT_EQ(ExitSuccess, procs[i]->Finish());
ASSERT_NE("", procs[i]->GetOutput());
@@ -254,10 +294,91 @@ TEST_F(SubprocessTest, SetWithLots) {
// that stdin is closed.
TEST_F(SubprocessTest, ReadStdin) {
Subprocess* subproc = subprocs_.Add("cat -");
+ subprocs_.ResetTokenAvailable();
while (!subproc->Done()) {
- subprocs_.DoWork();
+ subprocs_.DoWork(NULL);
}
+ ASSERT_FALSE(subprocs_.IsTokenAvailable());
ASSERT_EQ(ExitSuccess, subproc->Finish());
ASSERT_EQ(1u, subprocs_.finished_.size());
}
#endif // _WIN32
+
+TEST_F(SubprocessTest, TokenAvailable) {
+ Subprocess* subproc = subprocs_.Add(kSimpleCommand);
+ ASSERT_NE((Subprocess *) 0, subproc);
+
+ // simulate GNUmake jobserver pipe with 1 token
+#ifdef _WIN32
+ tokens_._token_available = true;
+#else
+ int fds[2];
+ ASSERT_EQ(0u, pipe(fds));
+ tokens_._fd = fds[0];
+ ASSERT_EQ(1u, write(fds[1], "T", 1));
+#endif
+
+ subprocs_.ResetTokenAvailable();
+ subprocs_.DoWork(&tokens_);
+#ifdef _WIN32
+ tokens_._token_available = false;
+ // we need to loop here as we have no control where the token
+ // I/O completion post ends up in the queue
+ while (!subproc->Done() && !subprocs_.IsTokenAvailable()) {
+ subprocs_.DoWork(&tokens_);
+ }
+#endif
+
+ EXPECT_TRUE(subprocs_.IsTokenAvailable());
+ EXPECT_EQ(0u, subprocs_.finished_.size());
+
+ // remove token to let DoWork() wait for command again
+#ifndef _WIN32
+ char token;
+ ASSERT_EQ(1u, read(fds[0], &token, 1));
+#endif
+
+ while (!subproc->Done()) {
+ subprocs_.DoWork(&tokens_);
+ }
+
+#ifndef _WIN32
+ close(fds[1]);
+ close(fds[0]);
+#endif
+
+ EXPECT_EQ(ExitSuccess, subproc->Finish());
+ EXPECT_NE("", subproc->GetOutput());
+
+ EXPECT_EQ(1u, subprocs_.finished_.size());
+}
+
+TEST_F(SubprocessTest, TokenNotAvailable) {
+ Subprocess* subproc = subprocs_.Add(kSimpleCommand);
+ ASSERT_NE((Subprocess *) 0, subproc);
+
+ // simulate GNUmake jobserver pipe with 0 tokens
+#ifdef _WIN32
+ tokens_._token_available = false;
+#else
+ int fds[2];
+ ASSERT_EQ(0u, pipe(fds));
+ tokens_._fd = fds[0];
+#endif
+
+ subprocs_.ResetTokenAvailable();
+ while (!subproc->Done()) {
+ subprocs_.DoWork(&tokens_);
+ }
+
+#ifndef _WIN32
+ close(fds[1]);
+ close(fds[0]);
+#endif
+
+ EXPECT_FALSE(subprocs_.IsTokenAvailable());
+ EXPECT_EQ(ExitSuccess, subproc->Finish());
+ EXPECT_NE("", subproc->GetOutput());
+
+ EXPECT_EQ(1u, subprocs_.finished_.size());
+}
--- a/src/ninja.cc
+++ b/src/ninja.cc
@@ -1447,6 +1447,7 @@ int ReadFlags(int* argc, char*** argv,
// We want to run N jobs in parallel. For N = 0, INT_MAX
// is close enough to infinite for most sane builds.
config->parallelism = value > 0 ? value : INT_MAX;
+ config->parallelism_from_cmdline = true;
deferGuessParallelism.needGuess = false;
break;
}
--- /dev/null
+++ b/src/tokenpool_test.cc
@@ -0,0 +1,279 @@
+// Copyright 2018 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "tokenpool.h"
+
+#include "test.h"
+
+#ifdef _WIN32
+#include <windows.h>
+#else
+#include <unistd.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifdef _WIN32
+// should contain all valid characters
+#define SEMAPHORE_NAME "abcdefghijklmnopqrstwxyz01234567890_"
+#define AUTH_FORMAT(tmpl) "foo " tmpl "=%s bar"
+#define ENVIRONMENT_CLEAR() SetEnvironmentVariable("MAKEFLAGS", NULL)
+#define ENVIRONMENT_INIT(v) SetEnvironmentVariable("MAKEFLAGS", v)
+#else
+#define AUTH_FORMAT(tmpl) "foo " tmpl "=%d,%d bar"
+#define ENVIRONMENT_CLEAR() unsetenv("MAKEFLAGS")
+#define ENVIRONMENT_INIT(v) setenv("MAKEFLAGS", v, true)
+#endif
+
+namespace {
+
+const double kLoadAverageDefault = -1.23456789;
+
+struct TokenPoolTest : public testing::Test {
+ double load_avg_;
+ TokenPool* tokens_;
+ char buf_[1024];
+#ifdef _WIN32
+ const char* semaphore_name_;
+ HANDLE semaphore_;
+#else
+ int fds_[2];
+
+ char random() {
+ return int((rand() / double(RAND_MAX)) * 256);
+ }
+#endif
+
+ virtual void SetUp() {
+ load_avg_ = kLoadAverageDefault;
+ tokens_ = NULL;
+ ENVIRONMENT_CLEAR();
+#ifdef _WIN32
+ semaphore_name_ = SEMAPHORE_NAME;
+ if ((semaphore_ = CreateSemaphore(0, 0, 2, SEMAPHORE_NAME)) == NULL)
+#else
+ if (pipe(fds_) < 0)
+#endif
+ ASSERT_TRUE(false);
+ }
+
+ void CreatePool(const char* format, bool ignore_jobserver = false) {
+ if (format) {
+ sprintf(buf_, format,
+#ifdef _WIN32
+ semaphore_name_
+#else
+ fds_[0], fds_[1]
+#endif
+ );
+ ENVIRONMENT_INIT(buf_);
+ }
+ if ((tokens_ = TokenPool::Get()) != NULL) {
+ if (!tokens_->Setup(ignore_jobserver, false, load_avg_)) {
+ delete tokens_;
+ tokens_ = NULL;
+ }
+ }
+ }
+
+ void CreateDefaultPool() {
+ CreatePool(AUTH_FORMAT("--jobserver-auth"));
+ }
+
+ virtual void TearDown() {
+ if (tokens_)
+ delete tokens_;
+#ifdef _WIN32
+ CloseHandle(semaphore_);
+#else
+ close(fds_[0]);
+ close(fds_[1]);
+#endif
+ ENVIRONMENT_CLEAR();
+ }
+};
+
+} // anonymous namespace
+
+// verifies none implementation
+TEST_F(TokenPoolTest, NoTokenPool) {
+ CreatePool(NULL, false);
+
+ EXPECT_EQ(NULL, tokens_);
+ EXPECT_EQ(kLoadAverageDefault, load_avg_);
+}
+
+TEST_F(TokenPoolTest, SuccessfulOldSetup) {
+ // GNUmake <= 4.1
+ CreatePool(AUTH_FORMAT("--jobserver-fds"));
+
+ EXPECT_NE(NULL, tokens_);
+ EXPECT_EQ(kLoadAverageDefault, load_avg_);
+}
+
+TEST_F(TokenPoolTest, SuccessfulNewSetup) {
+ // GNUmake => 4.2
+ CreateDefaultPool();
+
+ EXPECT_NE(NULL, tokens_);
+ EXPECT_EQ(kLoadAverageDefault, load_avg_);
+}
+
+TEST_F(TokenPoolTest, IgnoreWithJN) {
+ CreatePool(AUTH_FORMAT("--jobserver-auth"), true);
+
+ EXPECT_EQ(NULL, tokens_);
+ EXPECT_EQ(kLoadAverageDefault, load_avg_);
+}
+
+TEST_F(TokenPoolTest, HonorLN) {
+ CreatePool(AUTH_FORMAT("-l9 --jobserver-auth"));
+
+ EXPECT_NE(NULL, tokens_);
+ EXPECT_EQ(9.0, load_avg_);
+}
+
+#ifdef _WIN32
+TEST_F(TokenPoolTest, SemaphoreNotFound) {
+ semaphore_name_ = SEMAPHORE_NAME "_foobar";
+ CreateDefaultPool();
+
+ EXPECT_EQ(NULL, tokens_);
+ EXPECT_EQ(kLoadAverageDefault, load_avg_);
+}
+
+TEST_F(TokenPoolTest, TokenIsAvailable) {
+ CreateDefaultPool();
+
+ ASSERT_NE(NULL, tokens_);
+ EXPECT_EQ(kLoadAverageDefault, load_avg_);
+
+ EXPECT_TRUE(tokens_->TokenIsAvailable((ULONG_PTR)tokens_));
+}
+#else
+TEST_F(TokenPoolTest, MonitorFD) {
+ CreateDefaultPool();
+
+ ASSERT_NE(NULL, tokens_);
+ EXPECT_EQ(kLoadAverageDefault, load_avg_);
+
+ EXPECT_EQ(fds_[0], tokens_->GetMonitorFd());
+}
+#endif
+
+TEST_F(TokenPoolTest, ImplicitToken) {
+ CreateDefaultPool();
+
+ ASSERT_NE(NULL, tokens_);
+ EXPECT_EQ(kLoadAverageDefault, load_avg_);
+
+ EXPECT_TRUE(tokens_->Acquire());
+ tokens_->Reserve();
+ EXPECT_FALSE(tokens_->Acquire());
+ tokens_->Release();
+ EXPECT_TRUE(tokens_->Acquire());
+}
+
+TEST_F(TokenPoolTest, TwoTokens) {
+ CreateDefaultPool();
+
+ ASSERT_NE(NULL, tokens_);
+ EXPECT_EQ(kLoadAverageDefault, load_avg_);
+
+ // implicit token
+ EXPECT_TRUE(tokens_->Acquire());
+ tokens_->Reserve();
+ EXPECT_FALSE(tokens_->Acquire());
+
+ // jobserver offers 2nd token
+#ifdef _WIN32
+ LONG previous;
+ ASSERT_TRUE(ReleaseSemaphore(semaphore_, 1, &previous));
+ ASSERT_EQ(0, previous);
+#else
+ char test_tokens[1] = { random() };
+ ASSERT_EQ(1u, write(fds_[1], test_tokens, sizeof(test_tokens)));
+#endif
+ EXPECT_TRUE(tokens_->Acquire());
+ tokens_->Reserve();
+ EXPECT_FALSE(tokens_->Acquire());
+
+ // release 2nd token
+ tokens_->Release();
+ EXPECT_TRUE(tokens_->Acquire());
+
+ // release implicit token - must return 2nd token back to jobserver
+ tokens_->Release();
+ EXPECT_TRUE(tokens_->Acquire());
+
+ // there must be one token available
+#ifdef _WIN32
+ EXPECT_EQ(WAIT_OBJECT_0, WaitForSingleObject(semaphore_, 0));
+ EXPECT_TRUE(ReleaseSemaphore(semaphore_, 1, &previous));
+ EXPECT_EQ(0, previous);
+#else
+ EXPECT_EQ(1u, read(fds_[0], buf_, sizeof(buf_)));
+ EXPECT_EQ(test_tokens[0], buf_[0]);
+#endif
+
+ // implicit token
+ EXPECT_TRUE(tokens_->Acquire());
+}
+
+TEST_F(TokenPoolTest, Clear) {
+ CreateDefaultPool();
+
+ ASSERT_NE(NULL, tokens_);
+ EXPECT_EQ(kLoadAverageDefault, load_avg_);
+
+ // implicit token
+ EXPECT_TRUE(tokens_->Acquire());
+ tokens_->Reserve();
+ EXPECT_FALSE(tokens_->Acquire());
+
+ // jobserver offers 2nd & 3rd token
+#ifdef _WIN32
+ LONG previous;
+ ASSERT_TRUE(ReleaseSemaphore(semaphore_, 2, &previous));
+ ASSERT_EQ(0, previous);
+#else
+ char test_tokens[2] = { random(), random() };
+ ASSERT_EQ(2u, write(fds_[1], test_tokens, sizeof(test_tokens)));
+#endif
+ EXPECT_TRUE(tokens_->Acquire());
+ tokens_->Reserve();
+ EXPECT_TRUE(tokens_->Acquire());
+ tokens_->Reserve();
+ EXPECT_FALSE(tokens_->Acquire());
+
+ tokens_->Clear();
+ EXPECT_TRUE(tokens_->Acquire());
+
+ // there must be two tokens available
+#ifdef _WIN32
+ EXPECT_EQ(WAIT_OBJECT_0, WaitForSingleObject(semaphore_, 0));
+ EXPECT_EQ(WAIT_OBJECT_0, WaitForSingleObject(semaphore_, 0));
+ EXPECT_TRUE(ReleaseSemaphore(semaphore_, 2, &previous));
+ EXPECT_EQ(0, previous);
+#else
+ EXPECT_EQ(2u, read(fds_[0], buf_, sizeof(buf_)));
+ // tokens are pushed onto a stack, hence returned in reverse order
+ EXPECT_EQ(test_tokens[0], buf_[1]);
+ EXPECT_EQ(test_tokens[1], buf_[0]);
+#endif
+
+ // implicit token
+ EXPECT_TRUE(tokens_->Acquire());
+}
--- /dev/null
+++ b/src/tokenpool-gnu-make-posix.cc
@@ -0,0 +1,214 @@
+// Copyright 2016-2018 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "tokenpool-gnu-make.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <poll.h>
+#include <unistd.h>
+#include <signal.h>
+#include <sys/time.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stack>
+
+// TokenPool implementation for GNU make jobserver - POSIX implementation
+// (http://make.mad-scientist.net/papers/jobserver-implementation/)
+struct GNUmakeTokenPoolPosix : public GNUmakeTokenPool {
+ GNUmakeTokenPoolPosix();
+ virtual ~GNUmakeTokenPoolPosix();
+
+ virtual int GetMonitorFd();
+
+ virtual const char* GetEnv(const char* name) { return getenv(name); };
+ virtual bool ParseAuth(const char* jobserver);
+ virtual bool AcquireToken();
+ virtual bool ReturnToken();
+
+ private:
+ int rfd_;
+ int wfd_;
+
+ struct sigaction old_act_;
+ bool restore_;
+
+ // See https://www.gnu.org/software/make/manual/html_node/POSIX-Jobserver.html
+ //
+ // It’s important that when you release the job slot, you write back
+ // the same character you read. Don’t assume that all tokens are the
+ // same character different characters may have different meanings to
+ // GNU make. The order is not important, since make has no idea in
+ // what order jobs will complete anyway.
+ //
+ std::stack<char> tokens_;
+
+ static int dup_rfd_;
+ static void CloseDupRfd(int signum);
+
+ bool CheckFd(int fd);
+ bool SetAlarmHandler();
+};
+
+GNUmakeTokenPoolPosix::GNUmakeTokenPoolPosix() : rfd_(-1), wfd_(-1), restore_(false) {
+}
+
+GNUmakeTokenPoolPosix::~GNUmakeTokenPoolPosix() {
+ Clear();
+ if (restore_)
+ sigaction(SIGALRM, &old_act_, NULL);
+}
+
+bool GNUmakeTokenPoolPosix::CheckFd(int fd) {
+ if (fd < 0)
+ return false;
+ int ret = fcntl(fd, F_GETFD);
+ return ret >= 0;
+}
+
+int GNUmakeTokenPoolPosix::dup_rfd_ = -1;
+
+void GNUmakeTokenPoolPosix::CloseDupRfd(int signum) {
+ close(dup_rfd_);
+ dup_rfd_ = -1;
+}
+
+bool GNUmakeTokenPoolPosix::SetAlarmHandler() {
+ struct sigaction act;
+ memset(&act, 0, sizeof(act));
+ act.sa_handler = CloseDupRfd;
+ if (sigaction(SIGALRM, &act, &old_act_) < 0) {
+ perror("sigaction:");
+ return false;
+ }
+ restore_ = true;
+ return true;
+}
+
+bool GNUmakeTokenPoolPosix::ParseAuth(const char* jobserver) {
+ int rfd = -1;
+ int wfd = -1;
+ if ((sscanf(jobserver, "%*[^=]=%d,%d", &rfd, &wfd) == 2) &&
+ CheckFd(rfd) &&
+ CheckFd(wfd) &&
+ SetAlarmHandler()) {
+ rfd_ = rfd;
+ wfd_ = wfd;
+ return true;
+ }
+
+ return false;
+}
+
+bool GNUmakeTokenPoolPosix::AcquireToken() {
+ // Please read
+ //
+ // http://make.mad-scientist.net/papers/jobserver-implementation/
+ //
+ // for the reasoning behind the following code.
+ //
+ // Try to read one character from the pipe. Returns true on success.
+ //
+ // First check if read() would succeed without blocking.
+#ifdef USE_PPOLL
+ pollfd pollfds[] = {{rfd_, POLLIN, 0}};
+ int ret = poll(pollfds, 1, 0);
+#else
+ fd_set set;
+ struct timeval timeout = { 0, 0 };
+ FD_ZERO(&set);
+ FD_SET(rfd_, &set);
+ int ret = select(rfd_ + 1, &set, NULL, NULL, &timeout);
+#endif
+ if (ret > 0) {
+ // Handle potential race condition:
+ // - the above check succeeded, i.e. read() should not block
+ // - the character disappears before we call read()
+ //
+ // Create a duplicate of rfd_. The duplicate file descriptor dup_rfd_
+ // can safely be closed by signal handlers without affecting rfd_.
+ dup_rfd_ = dup(rfd_);
+
+ if (dup_rfd_ != -1) {
+ struct sigaction act, old_act;
+ int ret = 0;
+ char buf;
+
+ // Temporarily replace SIGCHLD handler with our own
+ memset(&act, 0, sizeof(act));
+ act.sa_handler = CloseDupRfd;
+ if (sigaction(SIGCHLD, &act, &old_act) == 0) {
+ struct itimerval timeout;
+
+ // install a 100ms timeout that generates SIGALARM on expiration
+ memset(&timeout, 0, sizeof(timeout));
+ timeout.it_value.tv_usec = 100 * 1000; // [ms] -> [usec]
+ if (setitimer(ITIMER_REAL, &timeout, NULL) == 0) {
+ // Now try to read() from dup_rfd_. Return values from read():
+ //
+ // 1. token read -> 1
+ // 2. pipe closed -> 0
+ // 3. alarm expires -> -1 (EINTR)
+ // 4. child exits -> -1 (EINTR)
+ // 5. alarm expired before entering read() -> -1 (EBADF)
+ // 6. child exited before entering read() -> -1 (EBADF)
+ // 7. child exited before handler is installed -> go to 1 - 3
+ ret = read(dup_rfd_, &buf, 1);
+
+ // disarm timer
+ memset(&timeout, 0, sizeof(timeout));
+ setitimer(ITIMER_REAL, &timeout, NULL);
+ }
+
+ sigaction(SIGCHLD, &old_act, NULL);
+ }
+
+ CloseDupRfd(0);
+
+ // Case 1 from above list
+ if (ret > 0) {
+ tokens_.push(buf);
+ return true;
+ }
+ }
+ }
+
+ // read() would block, i.e. no token available,
+ // cases 2-6 from above list or
+ // select() / poll() / dup() / sigaction() / setitimer() failed
+ return false;
+}
+
+bool GNUmakeTokenPoolPosix::ReturnToken() {
+ const char buf = tokens_.top();
+ while (1) {
+ int ret = write(wfd_, &buf, 1);
+ if (ret > 0) {
+ tokens_.pop();
+ return true;
+ }
+ if ((ret != -1) || (errno != EINTR))
+ return false;
+ // write got interrupted - retry
+ }
+}
+
+int GNUmakeTokenPoolPosix::GetMonitorFd() {
+ return rfd_;
+}
+
+TokenPool* TokenPool::Get() {
+ return new GNUmakeTokenPoolPosix;
+}
--- /dev/null
+++ b/src/tokenpool-gnu-make-win32.cc
@@ -0,0 +1,239 @@
+// Copyright 2018 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "tokenpool-gnu-make.h"
+
+// Always include this first.
+// Otherwise the other system headers don't work correctly under Win32
+#include <windows.h>
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "util.h"
+
+// TokenPool implementation for GNU make jobserver - Win32 implementation
+// (https://www.gnu.org/software/make/manual/html_node/Windows-Jobserver.html)
+struct GNUmakeTokenPoolWin32 : public GNUmakeTokenPool {
+ GNUmakeTokenPoolWin32();
+ virtual ~GNUmakeTokenPoolWin32();
+
+ virtual void WaitForTokenAvailability(HANDLE ioport);
+ virtual bool TokenIsAvailable(ULONG_PTR key);
+
+ virtual const char* GetEnv(const char* name);
+ virtual bool ParseAuth(const char* jobserver);
+ virtual bool AcquireToken();
+ virtual bool ReturnToken();
+
+ private:
+ // Semaphore for GNU make jobserver protocol
+ HANDLE semaphore_jobserver_;
+ // Semaphore Child -> Parent
+ // - child releases it before entering wait on jobserver semaphore
+ // - parent blocks on it to know when child enters wait
+ HANDLE semaphore_enter_wait_;
+ // Semaphore Parent -> Child
+ // - parent releases it to allow child to restart loop
+ // - child blocks on it to know when to restart loop
+ HANDLE semaphore_restart_;
+ // set to false if child should exit loop and terminate thread
+ bool running_;
+ // child thread
+ HANDLE child_;
+ // I/O completion port from SubprocessSet
+ HANDLE ioport_;
+
+
+ DWORD SemaphoreThread();
+ void ReleaseSemaphore(HANDLE semaphore);
+ void WaitForObject(HANDLE object);
+ static DWORD WINAPI SemaphoreThreadWrapper(LPVOID param);
+ static void NoopAPCFunc(ULONG_PTR param);
+};
+
+GNUmakeTokenPoolWin32::GNUmakeTokenPoolWin32() : semaphore_jobserver_(NULL),
+ semaphore_enter_wait_(NULL),
+ semaphore_restart_(NULL),
+ running_(false),
+ child_(NULL),
+ ioport_(NULL) {
+}
+
+GNUmakeTokenPoolWin32::~GNUmakeTokenPoolWin32() {
+ Clear();
+ CloseHandle(semaphore_jobserver_);
+ semaphore_jobserver_ = NULL;
+
+ if (child_) {
+ // tell child thread to exit
+ running_ = false;
+ ReleaseSemaphore(semaphore_restart_);
+
+ // wait for child thread to exit
+ WaitForObject(child_);
+ CloseHandle(child_);
+ child_ = NULL;
+ }
+
+ if (semaphore_restart_) {
+ CloseHandle(semaphore_restart_);
+ semaphore_restart_ = NULL;
+ }
+
+ if (semaphore_enter_wait_) {
+ CloseHandle(semaphore_enter_wait_);
+ semaphore_enter_wait_ = NULL;
+ }
+}
+
+const char* GNUmakeTokenPoolWin32::GetEnv(const char* name) {
+ // getenv() does not work correctly together with tokenpool_tests.cc
+ static char buffer[MAX_PATH + 1];
+ if (GetEnvironmentVariable(name, buffer, sizeof(buffer)) == 0)
+ return NULL;
+ return buffer;
+}
+
+bool GNUmakeTokenPoolWin32::ParseAuth(const char* jobserver) {
+ // match "--jobserver-auth=gmake_semaphore_<INTEGER>..."
+ const char* start = strchr(jobserver, '=');
+ if (start) {
+ const char* end = start;
+ unsigned int len;
+ char c, *auth;
+
+ while ((c = *++end) != '\0')
+ if (!(isalnum(c) || (c == '_')))
+ break;
+ len = end - start; // includes string terminator in count
+
+ if ((len > 1) && ((auth = (char*)malloc(len)) != NULL)) {
+ strncpy(auth, start + 1, len - 1);
+ auth[len - 1] = '\0';
+
+ if ((semaphore_jobserver_ =
+ OpenSemaphore(SEMAPHORE_ALL_ACCESS, /* Semaphore access setting */
+ FALSE, /* Child processes DON'T inherit */
+ auth /* Semaphore name */
+ )) != NULL) {
+ free(auth);
+ return true;
+ }
+
+ free(auth);
+ }
+ }
+
+ return false;
+}
+
+bool GNUmakeTokenPoolWin32::AcquireToken() {
+ return WaitForSingleObject(semaphore_jobserver_, 0) == WAIT_OBJECT_0;
+}
+
+bool GNUmakeTokenPoolWin32::ReturnToken() {
+ ReleaseSemaphore(semaphore_jobserver_);
+ return true;
+}
+
+DWORD GNUmakeTokenPoolWin32::SemaphoreThread() {
+ while (running_) {
+ // indicate to parent that we are entering wait
+ ReleaseSemaphore(semaphore_enter_wait_);
+
+ // alertable wait forever on token semaphore
+ if (WaitForSingleObjectEx(semaphore_jobserver_, INFINITE, TRUE) == WAIT_OBJECT_0) {
+ // release token again for AcquireToken()
+ ReleaseSemaphore(semaphore_jobserver_);
+
+ // indicate to parent on ioport that a token might be available
+ if (!PostQueuedCompletionStatus(ioport_, 0, (ULONG_PTR) this, NULL))
+ Win32Fatal("PostQueuedCompletionStatus");
+ }
+
+ // wait for parent to allow loop restart
+ WaitForObject(semaphore_restart_);
+ // semaphore is now in nonsignaled state again for next run...
+ }
+
+ return 0;
+}
+
+DWORD WINAPI GNUmakeTokenPoolWin32::SemaphoreThreadWrapper(LPVOID param) {
+ GNUmakeTokenPoolWin32* This = (GNUmakeTokenPoolWin32*) param;
+ return This->SemaphoreThread();
+}
+
+void GNUmakeTokenPoolWin32::NoopAPCFunc(ULONG_PTR param) {
+}
+
+void GNUmakeTokenPoolWin32::WaitForTokenAvailability(HANDLE ioport) {
+ if (child_ == NULL) {
+ // first invocation
+ //
+ // subprocess-win32.cc uses I/O completion port (IOCP) which can't be
+ // used as a waitable object. Therefore we can't use WaitMultipleObjects()
+ // to wait on the IOCP and the token semaphore at the same time. Create
+ // a child thread that waits on the semaphore and posts an I/O completion
+ ioport_ = ioport;
+
+ // create both semaphores in nonsignaled state
+ if ((semaphore_enter_wait_ = CreateSemaphore(NULL, 0, 1, NULL))
+ == NULL)
+ Win32Fatal("CreateSemaphore/enter_wait");
+ if ((semaphore_restart_ = CreateSemaphore(NULL, 0, 1, NULL))
+ == NULL)
+ Win32Fatal("CreateSemaphore/restart");
+
+ // start child thread
+ running_ = true;
+ if ((child_ = CreateThread(NULL, 0, &SemaphoreThreadWrapper, this, 0, NULL))
+ == NULL)
+ Win32Fatal("CreateThread");
+
+ } else {
+ // all further invocations - allow child thread to loop
+ ReleaseSemaphore(semaphore_restart_);
+ }
+
+ // wait for child thread to enter wait
+ WaitForObject(semaphore_enter_wait_);
+ // semaphore is now in nonsignaled state again for next run...
+
+ // now SubprocessSet::DoWork() can enter GetQueuedCompletionStatus()...
+}
+
+bool GNUmakeTokenPoolWin32::TokenIsAvailable(ULONG_PTR key) {
+ // alert child thread to break wait on token semaphore
+ QueueUserAPC((PAPCFUNC)&NoopAPCFunc, child_, (ULONG_PTR)NULL);
+
+ // return true when GetQueuedCompletionStatus() returned our key
+ return key == (ULONG_PTR) this;
+}
+
+void GNUmakeTokenPoolWin32::ReleaseSemaphore(HANDLE semaphore) {
+ if (!::ReleaseSemaphore(semaphore, 1, NULL))
+ Win32Fatal("ReleaseSemaphore");
+}
+
+void GNUmakeTokenPoolWin32::WaitForObject(HANDLE object) {
+ if (WaitForSingleObject(object, INFINITE) != WAIT_OBJECT_0)
+ Win32Fatal("WaitForSingleObject");
+}
+
+TokenPool* TokenPool::Get() {
+ return new GNUmakeTokenPoolWin32;
+}
--- /dev/null
+++ b/src/tokenpool-gnu-make.h
@@ -0,0 +1,40 @@
+// Copyright 2016-2018 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "tokenpool.h"
+
+// interface to GNU make token pool
+struct GNUmakeTokenPool : public TokenPool {
+ GNUmakeTokenPool();
+ ~GNUmakeTokenPool();
+
+ // token pool implementation
+ virtual bool Acquire();
+ virtual void Reserve();
+ virtual void Release();
+ virtual void Clear();
+ virtual bool Setup(bool ignore, bool verbose, double& max_load_average);
+
+ // platform specific implementation
+ virtual const char* GetEnv(const char* name) = 0;
+ virtual bool ParseAuth(const char* jobserver) = 0;
+ virtual bool AcquireToken() = 0;
+ virtual bool ReturnToken() = 0;
+
+ private:
+ int available_;
+ int used_;
+
+ void Return();
+};
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -112,6 +112,7 @@ add_library(libninja OBJECT
src/state.cc
src/status.cc
src/string_piece_util.cc
+ src/tokenpool-gnu-make.cc
src/util.cc
src/version.cc
)
@@ -123,9 +124,14 @@ if(WIN32)
src/msvc_helper_main-win32.cc
src/getopt.c
src/minidump-win32.cc
+ src/tokenpool-gnu-make-win32.cc
)
else()
target_sources(libninja PRIVATE src/subprocess-posix.cc)
+ target_sources(libninja PRIVATE
+ src/subprocess-posix.cc
+ src/tokenpool-gnu-make-posix.cc
+ )
if(CMAKE_SYSTEM_NAME STREQUAL "OS400" OR CMAKE_SYSTEM_NAME STREQUAL "AIX")
target_sources(libninja PRIVATE src/getopt.c)
endif()
@@ -204,6 +210,7 @@ if(BUILD_TESTING)
src/string_piece_util_test.cc
src/subprocess_test.cc
src/test.cc
+ src/tokenpool_test.cc
src/util_test.cc
)
if(WIN32)
Reference in New Issue View Git Blame Copy Permalink