179 lines
3.6 KiB
C++
179 lines
3.6 KiB
C++
/*
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* \brief Thread facility
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* \author Norman Feske
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* \author Alexander Boettcher
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* \date 2009-10-02
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*/
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/*
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* Copyright (C) 2009-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#ifndef _CORE__INCLUDE__PLATFORM_THREAD_H_
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#define _CORE__INCLUDE__PLATFORM_THREAD_H_
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/* Genode includes */
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#include <thread/capability.h>
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#include <base/thread_state.h>
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#include <base/native_types.h>
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#include <base/thread.h>
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#include <base/pager.h>
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/* core includes */
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#include <address_space.h>
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namespace Genode {
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class Platform_pd;
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class Platform_thread
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{
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private:
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Platform_pd *_pd;
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Pager_object *_pager;
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addr_t _id_base;
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addr_t _sel_exc_base;
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unsigned _cpu_no;
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bool _is_main_thread;
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bool _is_vcpu;
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char _name[Thread_base::Context::NAME_LEN];
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addr_t _sel_ec() { return _id_base; }
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addr_t _sel_sc() { return _id_base + 1; }
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public:
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/* invalid thread number */
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enum { THREAD_INVALID = -1 };
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/**
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* Constructor
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*/
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Platform_thread(const char *name = 0,
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unsigned priority = 0,
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int thread_id = THREAD_INVALID);
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/**
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* Destructor
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*/
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~Platform_thread();
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/**
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* Start thread
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*
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* \param ip instruction pointer to start at
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* \param sp stack pointer to use
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*
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* \retval 0 successful
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* \retval -1 thread/vCPU could not be started
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*/
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int start(void *ip, void *sp);
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/**
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* Pause this thread
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*/
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Native_capability pause();
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/**
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* Resume this thread
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*/
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void resume();
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/**
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* Cancel currently blocking operation
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*/
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void cancel_blocking();
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/**
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* Override thread state with 's'
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*
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* \throw Cpu_session::State_access_failed
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*/
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void state(Thread_state s);
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/**
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* Read thread state
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*
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* \throw Cpu_session::State_access_failed
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*/
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Thread_state state();
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/**
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* Return the address space to which the thread is bound
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*/
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Weak_ptr<Address_space> address_space();
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/************************
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** Accessor functions **
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************************/
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/**
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* Set pager
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*/
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void pager(Pager_object *pager) { _pager = pager; }
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/**
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* Return pager object
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*/
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Pager_object *pager() { return _pager; }
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/**
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* Return identification of thread when faulting
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*/
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unsigned long pager_object_badge() const;
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/**
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* Set the executing CPU for this thread
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*/
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void affinity(unsigned cpu);
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/**
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* Get the executing CPU for this thread
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*/
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unsigned affinity();
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/**
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* Get thread name
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*/
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const char *name() const { return "noname"; }
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/**
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* Associate thread with protection domain
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*/
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void bind_to_pd(Platform_pd *pd, bool is_main_thread)
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{
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_pd = pd, _is_main_thread = is_main_thread;
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}
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/**
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* Return native EC cap with specific rights mask set.
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* If the cap is mapped the kernel will demote the
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* rights of the EC as specified by the rights mask.
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*
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* The cap is supposed to be returned to clients,
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* which they have to use as argument to identify
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* the thread to which they want attach portals.
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*
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* The demotion by the kernel during the map operation
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* takes care that the EC cap itself contains
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* no usable rights for the clients.
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*/
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Native_capability native_cap()
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{
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using namespace Nova;
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return Native_capability(
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_sel_ec(), Obj_crd::RIGHT_EC_RECALL);
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}
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void single_step(bool on);
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};
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}
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#endif /* _CORE__INCLUDE__PLATFORM_THREAD_H_ */
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