511acad507
This patch integrates three region maps into each PD session to reduce the session overhead and to simplify the PD creation procedure. Please refer to the issue cited below for an elaborative discussion. Note the API change: With this patch, the semantics of core's RM service have changed. Now, the service is merely a tool for creating and destroying managed dataspaces, which are rarely needed. Regular components no longer need a RM session. For this reason, the corresponding argument for the 'Process' and 'Child' constructors has been removed. The former interface of the 'Rm_session' is not named 'Region_map'. As a minor refinement, the 'Fault_type' enum values are now part of the 'Region_map::State' struct. Issue #1938
125 lines
3.2 KiB
C++
125 lines
3.2 KiB
C++
/*
|
|
* \brief Environment of a component
|
|
* \author Norman Feske
|
|
* \date 2006-07-01
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2006-2013 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
#ifndef _INCLUDE__BASE__ENV_H_
|
|
#define _INCLUDE__BASE__ENV_H_
|
|
|
|
#include <parent/capability.h>
|
|
#include <parent/parent.h>
|
|
#include <region_map/region_map.h>
|
|
#include <rm_session/rm_session.h> /* deprecated, kept for API compatibility only */
|
|
#include <ram_session/ram_session.h>
|
|
#include <cpu_session/cpu_session.h>
|
|
#include <cpu_session/capability.h>
|
|
#include <pd_session/capability.h>
|
|
#include <base/allocator.h>
|
|
#include <base/snprintf.h>
|
|
#include <base/lock.h>
|
|
|
|
namespace Genode {
|
|
|
|
struct Env;
|
|
|
|
/**
|
|
* Return the interface to the component's environment
|
|
*/
|
|
extern Env *env();
|
|
}
|
|
|
|
|
|
/**
|
|
* Component runtime environment
|
|
*
|
|
* The environment of a Genode component is defined by its parent. The 'Env'
|
|
* class allows the component to interact with its environment. It is
|
|
* initialized at the startup of the component.
|
|
*/
|
|
struct Genode::Env
|
|
{
|
|
virtual ~Env() { }
|
|
|
|
/**
|
|
* Communication channel to our parent
|
|
*/
|
|
virtual Parent *parent() = 0;
|
|
|
|
/**
|
|
* RAM session of the component
|
|
*
|
|
* The RAM Session represents a budget of memory (quota) that is
|
|
* available to the component. This budget can be used to allocate
|
|
* RAM dataspaces.
|
|
*/
|
|
virtual Ram_session *ram_session() = 0;
|
|
virtual Ram_session_capability ram_session_cap() = 0;
|
|
|
|
/**
|
|
* CPU session of the component
|
|
*
|
|
* This session is used to create the threads of the component.
|
|
*/
|
|
virtual Cpu_session *cpu_session() = 0;
|
|
virtual Cpu_session_capability cpu_session_cap() = 0;
|
|
|
|
/**
|
|
* Region-manager session of the component as created by the parent
|
|
*
|
|
* \deprecated This function exists for API compatibility only.
|
|
* The functionality of the former RM service is now
|
|
* provided by the 'Region_map' interface.
|
|
*/
|
|
virtual Region_map *rm_session() = 0;
|
|
|
|
/**
|
|
* PD session of the component as created by the parent
|
|
*/
|
|
virtual Pd_session *pd_session() = 0;
|
|
virtual Pd_session_capability pd_session_cap() = 0;
|
|
|
|
/**
|
|
* Heap backed by the RAM session of the environment
|
|
*/
|
|
virtual Allocator *heap() = 0;
|
|
|
|
/**
|
|
* Reload parent capability and reinitialize environment resources
|
|
*
|
|
* This function is solely used for implementing fork semantics.
|
|
* After forking a process, the new child process is executed
|
|
* within a copy of the address space of the forking process.
|
|
* Thereby, the new process inherits the original 'env' object of
|
|
* the forking process, which is meaningless in the context of the
|
|
* new process. By calling this function, the new process is able
|
|
* to reinitialize its 'env' with meaningful capabilities obtained
|
|
* via its updated parent capability.
|
|
*
|
|
* \noapi
|
|
*/
|
|
virtual void reinit(Native_capability::Dst, long) = 0;
|
|
|
|
/**
|
|
* Reinitialize main-thread object
|
|
*
|
|
* \param stack_area_rm new RM session of the stack area
|
|
*
|
|
* This function is solely used for implementing fork semantics
|
|
* as provided by the Noux environment.
|
|
*
|
|
* \noapi
|
|
*/
|
|
virtual void reinit_main_thread(Capability<Region_map> &stack_area_rm) = 0;
|
|
|
|
};
|
|
|
|
#endif /* _INCLUDE__BASE__ENV_H_ */
|