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linux_threading.cpp
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149 lines (125 loc) · 3.5 KB
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/******************************************************************************
* The MIT License (MIT)
*
* Copyright (c) 2014 Crytek
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
******************************************************************************/
#include "os/os_specific.h"
#include <time.h>
#include <unistd.h>
double Timing::GetTickFrequency()
{
return 1000000.0;
}
uint64_t Timing::GetTick()
{
timespec ts;
clock_gettime(CLOCK_MONOTONIC,&ts);
return uint64_t(ts.tv_sec)*1000000000ULL + uint32_t(ts.tv_nsec & 0xffffffff);
}
namespace Atomic
{
int32_t Inc32(volatile int32_t *i)
{
return __sync_fetch_and_add(i, int32_t(1));
}
int64_t Inc64(volatile int64_t *i)
{
return __sync_fetch_and_add(i, int64_t(1));
}
int64_t Dec64(volatile int64_t *i)
{
return __sync_fetch_and_add(i, int64_t(-1));
}
int64_t ExchAdd64(volatile int64_t *i, int64_t a)
{
return __sync_add_and_fetch(i, int64_t(a));
}
};
namespace Threading
{
template<>
CriticalSection::CriticalSectionTemplate()
{
pthread_mutexattr_init(&m_Data.attr);
pthread_mutexattr_settype(&m_Data.attr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init(&m_Data.lock, &m_Data.attr);
}
template<>
CriticalSection::~CriticalSectionTemplate()
{
pthread_mutex_destroy(&m_Data.lock);
pthread_mutexattr_destroy(&m_Data.attr);
}
template<>
void CriticalSection::Lock()
{
pthread_mutex_lock(&m_Data.lock);
}
template<>
bool CriticalSection::Trylock()
{
return pthread_mutex_trylock(&m_Data.lock) == 0;
}
template<>
void CriticalSection::Unlock()
{
pthread_mutex_unlock(&m_Data.lock);
}
struct ThreadInitData
{
ThreadEntry entryFunc;
void *userData;
};
static void *sThreadInit(void *init)
{
ThreadInitData *data = (ThreadInitData *)init;
// delete before going into entry function so lifetime is limited.
ThreadInitData local = *data;
delete data;
local.entryFunc(local.userData);
return NULL;
}
ThreadHandle CreateThread(ThreadEntry entryFunc, void *userData)
{
pthread_t thread;
ThreadInitData *initData = new ThreadInitData();
initData->entryFunc = entryFunc;
initData->userData = userData;
int res = pthread_create(&thread, NULL, sThreadInit, (void *)initData);
if(res != 0)
{
delete initData;
return (ThreadHandle)0;
}
return (ThreadHandle)thread;
}
void JoinThread(ThreadHandle handle)
{
pthread_join((pthread_t)handle, NULL);
}
void CloseThread(ThreadHandle handle)
{
}
void Sleep(uint32_t milliseconds)
{
usleep(milliseconds*1000);
}
};