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base: avoid use of deprecated base/printf.h

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Besides adapting the components to the use of base/log.h, the patch
cleans up a few base headers, i.e., it removes unused includes from
root/component.h, specifically base/heap.h and
ram_session/ram_session.h. Hence, components that relied on the implicit
inclusion of those headers have to manually include those headers now.

While adjusting the log messages, I repeatedly stumbled over the problem
that printing char * arguments is ambiguous. It is unclear whether to
print the argument as pointer or null-terminated string. To overcome
this problem, the patch introduces a new type 'Cstring' that allows the
caller to express that the argument should be handled as null-terminated
string. As a nice side effect, with this type in place, the optional len
argument of the 'String' class could be removed. Instead of supplying a
pair of (char const *, size_t), the constructor accepts a 'Cstring'.
This, in turn, clears the way let the 'String' constructor use the new
output mechanism to assemble a string from multiple arguments (and
thereby getting rid of snprintf within Genode in the near future).

To enforce the explicit resolution of the char * ambiguity, the 'char *'
overload of the 'print' function is marked as deleted.

Issue #1987
This commit is contained in:
Norman Feske
2016-07-13 19:07:09 +02:00
committed by Christian Helmuth
parent a5d3aa8373
commit 17c79a9e23
699 changed files with 5156 additions and 5865 deletions
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18
repos/gems/src/server/file_terminal/main.cc
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@ -13,7 +13,7 @@
/* Genode includes */
#include <base/heap.h>
#include <base/printf.h>
#include <base/log.h>
#include <base/rpc_server.h>
#include <base/sleep.h>
#include <cap_session/connection.h>
@ -30,11 +30,6 @@
#include <fcntl.h>
static bool const verbose = false;
#define PDBGV(...) if (verbose) PDBG(__VA_ARGS__)
class Open_file
{
private:
@ -73,7 +68,6 @@ class Open_file
Open_file(const char *filename) : _fd(-1)
{
PDBGV("open '%s'", filename);
_fd = ::open(filename, O_CREAT|O_RDWR);
if (_fd == -1)
::perror("open");
@ -122,7 +116,7 @@ class Open_file
void fill_read_buffer_and_notify_client()
{
if (_read_buf_bytes_used) {
PWRN("read buffer already in use");
Genode::warning("read buffer already in use");
return;
}
@ -196,7 +190,7 @@ namespace Terminal {
/* write data to descriptor */
if (::write(fd(), _io_buffer.local_addr<char>(), num_bytes) < 0)
PERR("write error, dropping data");
Genode::error("write error, dropping data");
}
Genode::Dataspace_capability _dataspace()
@ -241,10 +235,10 @@ namespace Terminal {
Session_component(io_buffer_size, filename);
} catch (Genode::Xml_node::Nonexistent_attribute) {
PERR("Missing \"filename\" attribute in policy definition");
Genode::error("missing \"filename\" attribute in policy definition");
throw Genode::Root::Unavailable();
} catch (Genode::Session_policy::No_policy_defined) {
PERR("Invalid session request, no matching policy");
Genode::error("invalid session request, no matching policy");
throw Genode::Root::Unavailable();
}
}
@ -267,7 +261,7 @@ int main()
{
using namespace Genode;
Genode::printf("--- file terminal started ---\n");
Genode::log("--- file terminal started ---");
/**
* The stack needs to be that large because certain functions