agunashe
149 строки
3.5 KiB
C++
149 строки
3.5 KiB
C++
/* Copyright (c) 2010 - 2021 Advanced Micro Devices, Inc.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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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 THE
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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 FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE. */
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#ifndef OCL_THREAD_H
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#define OCL_THREAD_H
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//!
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//! \file Thread.h
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//!
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#ifdef ATI_OS_WIN
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#ifndef _WIN32_WINNT
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#define _WIN32_WINNT 0x0501
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#endif
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#include "windows.h"
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#else
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#include "pthread.h"
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#endif
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//! Entry point for the thread
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//! prototype of the entry point in windows
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typedef void *(*oclThreadFunc)(void *);
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namespace OCLutil {
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//! \class Lock
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//! \brief Provides a wrapper for locking primitives used to
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//! synchronize _CPU_ threads.
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//!
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//! Common usage would be:
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//!
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//! OCL::Lock lock;
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//!
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//! ....
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//!
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//! // Critical section begins
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//!
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//! lock.lock();
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//!
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//! .....
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//!
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//! // Critical section ends
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//!
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//! lock.unlock();
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//!
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class Lock {
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public:
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//! Constructor for OCLLock
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Lock();
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//! Destructor for OCLLock
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~Lock();
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//! Try to acquire the lock, if available continue, else wait on the lock
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void lock();
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//! Try to acquire the lock, if available, hold it, else continue doing
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//! something else
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bool tryLock();
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//! Unlock the lock and return
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void unlock();
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private:
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/////////////////////////////////////////////////////////////
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//!
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//! Private data members and methods
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//!
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//! System specific synchronization primitive
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#ifdef ATI_OS_WIN
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CRITICAL_SECTION _cs;
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#else
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pthread_mutex_t _lock;
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#endif
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};
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//////////////////////////////////////////////////////////////
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//!
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//! \class Thread
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//! \brief Provides a wrapper for creating a _CPU_ thread.
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//!
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//! This class provides a simple wrapper to a CPU thread/
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//! The class name might be a bit confusing, esp considering
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//! the GPU has it's own threads as well.
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//!
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class Thread {
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public:
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//! Thread constructor and destructor. Note that the thread is
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//! NOT created in the constructor. The thread creation takes
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//! place in the create method
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Thread();
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~Thread();
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//! Wrapper for pthread_create. Pass the thread's entry
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//! point and data to be passed to the routine
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bool create(oclThreadFunc func, void *arg);
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//! Wrapper for pthread_join. The calling thread
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//! will wait until _this_ thread exits
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bool join();
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//! Get the thread data passed by the application
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void *getData() { return _data; }
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//! Get the thread ID
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static unsigned int getID();
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private:
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/////////////////////////////////////////////////////////////
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//!
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//! Private data members and methods
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//!
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#ifdef ATI_OS_WIN
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//! store the handle
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HANDLE _tid;
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unsigned int _ID;
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#else
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pthread_t _tid;
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pthread_attr_t _attr;
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#endif
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void *_data;
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};
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}; // namespace OCLutil
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#endif
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