195 lines
4.3 KiB
C++
195 lines
4.3 KiB
C++
/*
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* \brief OKL4 thread facility
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* \author Norman Feske
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* \date 2009-03-31
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*/
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/*
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* Copyright (C) 2009-2017 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 Affero General Public License version 3.
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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 <base/thread_state.h>
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#include <base/trace/types.h>
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/* core includes */
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#include <pager.h>
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#include <platform_pd.h>
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#include <assertion.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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/*
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* Noncopyable
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*/
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Platform_thread(Platform_thread const &);
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Platform_thread &operator = (Platform_thread const &);
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int _thread_id = THREAD_INVALID; /* plain thread number */
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Okl4::L4_ThreadId_t _l4_thread_id; /* L4 thread ID */
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char _name[32]; /* thread name that will be
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registered at the kernel
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debugger */
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Platform_pd *_platform_pd; /* protection domain thread
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is bound to */
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unsigned _priority; /* thread priority */
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Pager_object *_pager;
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public:
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enum { THREAD_INVALID = -1 }; /* invalid thread number */
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enum { DEFAULT_PRIORITY = 128 };
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/**
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* Constructor
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*/
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Platform_thread(size_t, const char *name,
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unsigned priority,
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Affinity::Location,
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addr_t utcb);
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/**
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* Constructor used for core-internal threads
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*/
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Platform_thread(char const *name)
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: Platform_thread(0, name, 0, Affinity::Location(), 0) { }
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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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* \param cpu_no target cpu
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*
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* \retval 0 successful
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* \retval -1 thread could not be started
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*/
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int start(void *ip, void *sp, unsigned int cpu_no = 0);
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/**
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* Pause this thread
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*/
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void pause();
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/**
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* Enable/disable single stepping
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*/
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void single_step(bool) { }
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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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* This thread is about to be bound
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*
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* \param thread_id local thread ID
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* \param l4_thread_id final L4 thread ID
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* \param pd platform pd, thread is bound to
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*/
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void bind(int thread_id, Okl4::L4_ThreadId_t l4_thread_id,
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Platform_pd &pd);
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/**
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* Unbind this thread
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*/
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void unbind();
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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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Thread_state state();
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/************************
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** Accessor functions **
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************************/
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/**
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* Return/set pager
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*/
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Pager_object &pager() const
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{
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if (_pager)
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return *_pager;
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ASSERT_NEVER_CALLED;
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}
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void pager(Pager_object &pager) { _pager = &pager; }
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/**
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* Get the 'Platform_pd' object this thread belongs to
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*/
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Platform_pd* pd() { return _platform_pd; }
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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(Affinity::Location) { }
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/**
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* Request the affinity of this thread
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*/
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Affinity::Location affinity() const { return Affinity::Location(); }
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/**
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* Set CPU quota of the thread
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*/
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void quota(size_t) { /* not supported */ }
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/**
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* Return execution time consumed by the thread
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*/
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Trace::Execution_time execution_time() const { return { 0, 0 }; }
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/*****************************
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** OKL4-specific Accessors **
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*****************************/
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int thread_id() const { return _thread_id; }
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Okl4::L4_ThreadId_t native_thread_id() const { return _l4_thread_id; }
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const char *name() const { return _name; }
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void set_l4_thread_id(Okl4::L4_ThreadId_t id) { _l4_thread_id = id; }
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};
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}
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#endif /* _CORE__INCLUDE__PLATFORM_THREAD_H_ */
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