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base/env: Implementation of 'Expanding_parent'

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This commit is contained in:
Norman Feske
2013-09-25 17:59:17 +02:00
parent ae40cb545c
commit 65c4246f95
6 changed files with 342 additions and 26 deletions
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17
base-linux/src/base/env/platform_env.cc vendored
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@ -67,7 +67,7 @@ Platform_env::Local_parent::session(Service_name const &service_name,
.ulong_value(~0);
if (size == 0)
return Parent_client::session(service_name, args, affinity);
return Expanding_parent_client::session(service_name, args, affinity);
Rm_session_mmap *rm = new (env()->heap())
Rm_session_mmap(true, size);
@ -75,7 +75,7 @@ Platform_env::Local_parent::session(Service_name const &service_name,
return Session_capability::local_cap(rm);
}
return Parent_client::session(service_name, args, affinity);
return Expanding_parent_client::session(service_name, args, affinity);
}
@ -98,10 +98,10 @@ void Platform_env::Local_parent::close(Session_capability session)
}
Platform_env::Local_parent::Local_parent(Parent_capability parent_cap)
: Parent_client(parent_cap)
{
}
Platform_env::Local_parent::Local_parent(Parent_capability parent_cap,
Emergency_ram_reserve &reserve)
: Expanding_parent_client(parent_cap, reserve)
{ }
/******************
@ -143,7 +143,7 @@ static Parent_capability obtain_parent_cap()
Platform_env::Local_parent &Platform_env::_parent()
{
static Local_parent local_parent(obtain_parent_cap());
static Local_parent local_parent(obtain_parent_cap(), *this);
return local_parent;
}
@ -153,7 +153,8 @@ Platform_env::Platform_env()
Platform_env_base(static_cap_cast<Ram_session>(_parent().session("Env::ram_session", "")),
static_cap_cast<Cpu_session>(_parent().session("Env::cpu_session", "")),
static_cap_cast<Pd_session> (_parent().session("Env::pd_session", ""))),
_heap(Platform_env_base::ram_session(), Platform_env_base::rm_session())
_heap(Platform_env_base::ram_session(), Platform_env_base::rm_session()),
_emergency_ram_ds(ram_session()->alloc(_emergency_ram_size()))
{
/* register TID and PID of the main thread at core */
cpu_session()->thread_id(parent()->main_thread_cap(),

26
base-linux/src/base/env/platform_env.h vendored
View File

@ -360,7 +360,7 @@ namespace Genode {
/**
* 'Platform_env' used by all processes except for core
*/
class Platform_env : public Platform_env_base
class Platform_env : public Platform_env_base, public Emergency_ram_reserve
{
private:
@ -376,7 +376,7 @@ namespace Genode {
* All requests that do not refer to the RM service are passed
* through the real parent interface.
*/
class Local_parent : public Parent_client
class Local_parent : public Expanding_parent_client
{
public:
@ -396,16 +396,25 @@ namespace Genode {
* promote requests to non-local
* services
*/
Local_parent(Parent_capability parent_cap);
Local_parent(Parent_capability parent_cap,
Emergency_ram_reserve &);
};
/**
* Obtain singleton instance of parent interface
* Return instance of parent interface
*/
static Local_parent &_parent();
Local_parent &_parent();
Heap _heap;
/*
* Emergency RAM reserve
*
* See the comment of '_fallback_sig_cap()' in 'env/env.cc'.
*/
constexpr static size_t _emergency_ram_size() { return 4*1024; }
Ram_dataspace_capability _emergency_ram_ds;
/*************************************
** Linux-specific helper functions **
@ -432,6 +441,13 @@ namespace Genode {
}
/*************************************
** Emergency_ram_reserve interface **
*************************************/
void release() { ram_session()->free(_emergency_ram_ds); }
/*******************
** Env interface **
*******************/