2015-04-07 12:13:12 +02:00
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/*
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This file is a part of the JThread package, which contains some object-
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oriented thread wrappers for different thread implementations.
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Copyright (c) 2000-2006 Jori Liesenborgs (jori.liesenborgs@gmail.com)
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*/
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#ifndef THREADING_THREAD_H
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#define THREADING_THREAD_H
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#include "threading/atomic.h"
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#include "threading/mutex.h"
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2015-10-17 05:43:29 +02:00
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#include "threads.h"
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2015-04-07 12:13:12 +02:00
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#include <string>
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2015-10-17 05:43:29 +02:00
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#if USE_CPP11_THREADS
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2015-04-07 12:13:12 +02:00
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#include <thread>
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#endif
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2015-10-17 05:43:29 +02:00
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/*
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* On platforms using pthreads, these five priority classes correlate to
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* even divisions between the minimum and maximum reported thread priority.
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*/
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#if !defined(_WIN32)
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#define THREAD_PRIORITY_LOWEST 0
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#define THREAD_PRIORITY_BELOW_NORMAL 1
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#define THREAD_PRIORITY_NORMAL 2
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#define THREAD_PRIORITY_ABOVE_NORMAL 3
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#define THREAD_PRIORITY_HIGHEST 4
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2015-04-07 12:13:12 +02:00
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#endif
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2015-10-17 05:43:29 +02:00
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class Thread {
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2015-04-07 12:13:12 +02:00
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public:
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2015-10-17 05:43:29 +02:00
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Thread(const std::string &name="");
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virtual ~Thread();
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2015-04-07 12:13:12 +02:00
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2015-10-17 05:43:29 +02:00
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/*
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* Begins execution of a new thread at the pure virtual method Thread::run().
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* Execution of the thread is guaranteed to have started after this function
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* returns.
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*/
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2015-04-07 12:13:12 +02:00
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bool start();
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2015-10-17 05:43:29 +02:00
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/*
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* Requests that the thread exit gracefully.
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* Returns immediately; thread execution is guaranteed to be complete after
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* a subsequent call to Thread::wait.
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*/
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bool stop();
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2015-04-07 12:13:12 +02:00
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2015-10-17 05:43:29 +02:00
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/*
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* Immediately terminates the thread.
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* This should be used with extreme caution, as the thread will not have
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* any opportunity to release resources it may be holding (such as memory
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* or locks).
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*/
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bool kill();
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2015-04-07 12:13:12 +02:00
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/*
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2015-10-17 05:43:29 +02:00
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* Waits for thread to finish.
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* Note: This does not stop a thread, you have to do this on your own.
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2015-04-07 12:13:12 +02:00
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* Returns immediately if the thread is not started.
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*/
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void wait();
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2015-10-17 05:43:29 +02:00
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/*
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* Returns true if the calling thread is this Thread object.
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*/
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bool isCurrentThread();
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inline bool isRunning() { return m_running; }
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inline bool stopRequested() { return m_request_stop; }
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inline threadid_t getThreadId() { return m_thread_id; }
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inline threadhandle_t getThreadHandle() { return m_thread_handle; }
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/*
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* Gets the thread return value.
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* Returns true if the thread has exited and the return value was available,
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* or false if the thread has yet to finish.
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*/
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bool getReturnValue(void **ret);
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/*
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* Binds (if possible, otherwise sets the affinity of) the thread to the
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* specific processor specified by proc_number.
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*/
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bool bindToProcessor(unsigned int proc_number);
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/*
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* Sets the thread priority to the specified priority.
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*
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* prio can be one of: THREAD_PRIORITY_LOWEST, THREAD_PRIORITY_BELOW_NORMAL,
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* THREAD_PRIORITY_NORMAL, THREAD_PRIORITY_ABOVE_NORMAL, THREAD_PRIORITY_HIGHEST.
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* On Windows, any of the other priorites as defined by SetThreadPriority
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* are supported as well.
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*
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* Note that it may be necessary to first set the threading policy or
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* scheduling algorithm to one that supports thread priorities if not
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* supported by default, otherwise this call will have no effect.
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*/
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bool setPriority(int prio);
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/*
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* Sets the currently executing thread's name to where supported; useful
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* for debugging.
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*/
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2015-04-07 12:13:12 +02:00
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static void setName(const std::string &name);
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2015-10-17 05:43:29 +02:00
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/*
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* Returns the number of processors/cores configured and active on this machine.
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*/
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static unsigned int getNumberOfProcessors();
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2015-04-07 12:13:12 +02:00
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protected:
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2015-10-17 05:43:29 +02:00
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std::string m_name;
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2015-04-07 12:13:12 +02:00
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virtual void *run() = 0;
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private:
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2015-10-17 05:43:29 +02:00
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void *m_retval;
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Atomic<bool> m_request_stop;
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Atomic<bool> m_running;
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Mutex m_continue_mutex;
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threadid_t m_thread_id;
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threadhandle_t m_thread_handle;
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void cleanup();
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static ThreadStartFunc threadProc;
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#ifdef _AIX
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// For AIX, there does not exist any mapping from pthread_t to tid_t
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// available to us, so we maintain one ourselves. This is set on thread start.
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tid_t m_kernel_thread_id;
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#endif
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#if USE_CPP11_THREADS
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std::thread *m_thread_obj;
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2015-04-07 12:13:12 +02:00
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#endif
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2015-10-17 05:43:29 +02:00
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2015-04-07 12:13:12 +02:00
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};
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#endif
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