ref: 4d674231706f0b2b335608e8cb2b93e1586372d6
dir: /codec/WelsThreadLib/src/WelsThreadLib.cpp/
/*!
* \copy
* Copyright (c) 2009-2013, Cisco Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*
* \file WelsThreadLib.c
*
* \brief Interfaces introduced in thread programming
*
* \date 11/17/2009 Created
*
*************************************************************************************
*/
#include "WelsThreadLib.h"
#include <stdio.h>
#ifdef _WIN32
void WelsSleep (uint32_t dwMilliseconds) {
Sleep (dwMilliseconds);
}
WELS_THREAD_ERROR_CODE WelsMutexInit (WELS_MUTEX* mutex) {
InitializeCriticalSection (mutex);
return WELS_THREAD_ERROR_OK;
}
WELS_THREAD_ERROR_CODE WelsMutexLock (WELS_MUTEX* mutex) {
EnterCriticalSection (mutex);
return WELS_THREAD_ERROR_OK;
}
WELS_THREAD_ERROR_CODE WelsMutexUnlock (WELS_MUTEX* mutex) {
LeaveCriticalSection (mutex);
return WELS_THREAD_ERROR_OK;
}
WELS_THREAD_ERROR_CODE WelsMutexDestroy (WELS_MUTEX* mutex) {
DeleteCriticalSection (mutex);
return WELS_THREAD_ERROR_OK;
}
WELS_THREAD_ERROR_CODE WelsEventInit (WELS_EVENT* event) {
WELS_EVENT h = CreateEvent (NULL, FALSE, FALSE, NULL);
if (h == NULL) {
return WELS_THREAD_ERROR_GENERIAL;
}
*event = h;
return WELS_THREAD_ERROR_OK;
}
WELS_THREAD_ERROR_CODE WelsEventSignal (WELS_EVENT* event) {
if (SetEvent (*event)) {
return WELS_THREAD_ERROR_OK;
}
return WELS_THREAD_ERROR_GENERIAL;
}
WELS_THREAD_ERROR_CODE WelsEventReset (WELS_EVENT* event) {
if (ResetEvent (*event))
return WELS_THREAD_ERROR_OK;
return WELS_THREAD_ERROR_GENERIAL;
}
WELS_THREAD_ERROR_CODE WelsEventWait (WELS_EVENT* event) {
return WaitForSingleObject (*event, INFINITE);
}
WELS_THREAD_ERROR_CODE WelsEventWaitWithTimeOut (WELS_EVENT* event, uint32_t dwMilliseconds) {
return WaitForSingleObject (*event, dwMilliseconds);
}
WELS_THREAD_ERROR_CODE WelsMultipleEventsWaitSingleBlocking (uint32_t nCount,
WELS_EVENT* event_list,
uint32_t dwMilliseconds) {
return WaitForMultipleObjects (nCount, event_list, FALSE, dwMilliseconds);
}
WELS_THREAD_ERROR_CODE WelsMultipleEventsWaitAllBlocking (uint32_t nCount, WELS_EVENT* event_list) {
return WaitForMultipleObjects (nCount, event_list, TRUE, (uint32_t) - 1);
}
WELS_THREAD_ERROR_CODE WelsEventDestroy (WELS_EVENT* event) {
CloseHandle (*event);
*event = NULL;
return WELS_THREAD_ERROR_OK;
}
WELS_THREAD_ERROR_CODE WelsThreadCreate (WELS_THREAD_HANDLE* thread, LPWELS_THREAD_ROUTINE routine,
void* arg, WELS_THREAD_ATTR attr) {
WELS_THREAD_HANDLE h = CreateThread (NULL, 0, routine, arg, 0, NULL);
if (h == NULL) {
return WELS_THREAD_ERROR_GENERIAL;
}
* thread = h;
return WELS_THREAD_ERROR_OK;
}
WELS_THREAD_ERROR_CODE WelsSetThreadCancelable() {
// nil implementation for WIN32
return WELS_THREAD_ERROR_OK;
}
WELS_THREAD_ERROR_CODE WelsThreadJoin (WELS_THREAD_HANDLE thread) {
WaitForSingleObject (thread, INFINITE);
return WELS_THREAD_ERROR_OK;
}
WELS_THREAD_ERROR_CODE WelsThreadCancel (WELS_THREAD_HANDLE thread) {
return WELS_THREAD_ERROR_OK;
}
WELS_THREAD_ERROR_CODE WelsThreadDestroy (WELS_THREAD_HANDLE* thread) {
if (thread != NULL) {
CloseHandle (*thread);
*thread = NULL;
}
return WELS_THREAD_ERROR_OK;
}
WELS_THREAD_HANDLE WelsThreadSelf() {
return GetCurrentThread();
}
WELS_THREAD_ERROR_CODE WelsQueryLogicalProcessInfo (WelsLogicalProcessInfo* pInfo) {
SYSTEM_INFO si;
GetSystemInfo (&si);
pInfo->ProcessorCount = si.dwNumberOfProcessors;
return WELS_THREAD_ERROR_OK;
}
#elif defined(__GNUC__)
#ifdef MACOS
#include <CoreServices/CoreServices.h>
//#include <Gestalt.h>
#endif//MACOS
static int32_t SystemCall (const str_t* pCmd, str_t* pRes, int32_t iSize) {
int32_t fd[2];
int32_t iPid;
int32_t iCount;
int32_t left;
str_t* p = NULL;
int32_t iMaxLen = iSize - 1;
memset (pRes, 0, iSize);
if (pipe (fd)) {
return -1;
}
if ((iPid = fork()) == 0) {
int32_t fd2[2];
if (pipe (fd2)) {
return -1;
}
close (STDOUT_FILENO);
dup2 (fd2[1], STDOUT_FILENO);
close (fd[0]);
close (fd2[1]);
system (pCmd);
read (fd2[0], pRes, iMaxLen);
write (fd[1], pRes, strlen (pRes)); // confirmed_safe_unsafe_usage
close (fd2[0]);
close (fd[1]);
exit (0);
}
close (fd[1]);
p = pRes;
left = iMaxLen;
while ((iCount = read (fd[0], p, left))) {
p += iCount;
left -= iCount;
if (left <= 0) break;
}
close (fd[0]);
return 0;
}
void WelsSleep (uint32_t dwMilliseconds) {
usleep (dwMilliseconds * 1000); // microseconds
}
WELS_THREAD_ERROR_CODE WelsThreadCreate (WELS_THREAD_HANDLE* thread, LPWELS_THREAD_ROUTINE routine,
void* arg, WELS_THREAD_ATTR attr) {
WELS_THREAD_ERROR_CODE err = 0;
pthread_attr_t at;
err = pthread_attr_init (&at);
if (err)
return err;
err = pthread_attr_setscope (&at, PTHREAD_SCOPE_SYSTEM);
if (err)
return err;
err = pthread_attr_setschedpolicy (&at, SCHED_FIFO);
if (err)
return err;
err = pthread_create (thread, &at, routine, arg);
pthread_attr_destroy (&at);
return err;
// return pthread_create(thread, NULL, routine, arg);
}
WELS_THREAD_ERROR_CODE WelsSetThreadCancelable() {
WELS_THREAD_ERROR_CODE err = pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, NULL);
if (0 == err)
err = pthread_setcanceltype (PTHREAD_CANCEL_DEFERRED, NULL);
return err;
}
WELS_THREAD_ERROR_CODE WelsThreadJoin (WELS_THREAD_HANDLE thread) {
return pthread_join (thread, NULL);
}
WELS_THREAD_ERROR_CODE WelsThreadCancel (WELS_THREAD_HANDLE thread) {
return pthread_cancel (thread);
}
WELS_THREAD_ERROR_CODE WelsThreadDestroy (WELS_THREAD_HANDLE* thread) {
return WELS_THREAD_ERROR_OK;
}
WELS_THREAD_HANDLE WelsThreadSelf() {
return pthread_self();
}
WELS_THREAD_ERROR_CODE WelsMutexInit (WELS_MUTEX* mutex) {
return pthread_mutex_init (mutex, NULL);
}
WELS_THREAD_ERROR_CODE WelsMutexLock (WELS_MUTEX* mutex) {
return pthread_mutex_lock (mutex);
}
WELS_THREAD_ERROR_CODE WelsMutexUnlock (WELS_MUTEX* mutex) {
return pthread_mutex_unlock (mutex);
}
WELS_THREAD_ERROR_CODE WelsMutexDestroy (WELS_MUTEX* mutex) {
return pthread_mutex_destroy (mutex);
}
// unnamed semaphores can not work well for posix threading models under not root users
WELS_THREAD_ERROR_CODE WelsEventInit (WELS_EVENT* event) {
return sem_init (event, 0, 0);
}
WELS_THREAD_ERROR_CODE WelsEventDestroy (WELS_EVENT* event) {
return sem_destroy (event); // match with sem_init
}
WELS_THREAD_ERROR_CODE WelsEventOpen (WELS_EVENT** p_event, str_t* event_name) {
if (p_event == NULL || event_name == NULL)
return WELS_THREAD_ERROR_GENERIAL;
*p_event = sem_open (event_name, O_CREAT, (S_IRUSR | S_IWUSR)/*0600*/, 0);
if (*p_event == (sem_t*)SEM_FAILED) {
sem_unlink (event_name);
*p_event = NULL;
return WELS_THREAD_ERROR_GENERIAL;
} else {
return WELS_THREAD_ERROR_OK;
}
}
WELS_THREAD_ERROR_CODE WelsEventClose (WELS_EVENT* event, str_t* event_name) {
WELS_THREAD_ERROR_CODE err = sem_close (event); // match with sem_open
if (event_name)
sem_unlink (event_name);
return err;
}
WELS_THREAD_ERROR_CODE WelsEventSignal (WELS_EVENT* event) {
WELS_THREAD_ERROR_CODE err = 0;
// int32_t val = 0;
// sem_getvalue(event, &val);
// fprintf( stderr, "before signal it, val= %d..\n",val );
err = sem_post (event);
// sem_getvalue(event, &val);
// fprintf( stderr, "after signal it, val= %d..\n",val );
return err;
}
WELS_THREAD_ERROR_CODE WelsEventReset (WELS_EVENT* event) {
// FIXME for posix event reset, seems not be supported for pthread??
sem_close (event);
return sem_init (event, 0, 0);
}
WELS_THREAD_ERROR_CODE WelsEventWait (WELS_EVENT* event) {
return sem_wait (event); // blocking until signaled
}
WELS_THREAD_ERROR_CODE WelsEventWaitWithTimeOut (WELS_EVENT* event, uint32_t dwMilliseconds) {
if (dwMilliseconds != (uint32_t) - 1) {
return sem_wait (event);
} else {
#if defined(MACOS)
int32_t err = 0;
int32_t wait_count = 0;
do {
err = sem_trywait (event);
if (WELS_THREAD_ERROR_OK == err)
break;// WELS_THREAD_ERROR_OK;
else if (wait_count > 0)
break;
usleep (dwMilliseconds * 1000);
++ wait_count;
} while (1);
return err;
#else
struct timespec ts;
struct timeval tv;
gettimeofday (&tv, 0);
ts.tv_sec = tv.tv_sec + dwMilliseconds / 1000;
ts.tv_nsec = tv.tv_usec * 1000 + (dwMilliseconds % 1000) * 1000000;
return sem_timedwait (event, &ts);
#endif//MACOS
}
}
WELS_THREAD_ERROR_CODE WelsMultipleEventsWaitSingleBlocking (uint32_t nCount,
WELS_EVENT** event_list,
uint32_t dwMilliseconds) {
// bWaitAll = FALSE && blocking
uint32_t nIdx = 0;
const uint32_t kuiAccessTime = 2; // 2 us once
// uint32_t uiSleepMs = 0;
if (nCount == 0)
return WELS_THREAD_ERROR_WAIT_FAILED;
while (1) {
nIdx = 0; // access each event by order
while (nIdx < nCount) {
int32_t err = 0;
//#if defined(MACOS) // clock_gettime(CLOCK_REALTIME) & sem_timedwait not supported on mac, so have below impl
int32_t wait_count = 0;
// struct timespec ts;
// struct timeval tv;
//
// gettimeofday(&tv,0);
// ts.tv_sec = tv.tv_sec/*+ kuiAccessTime / 1000*/; // second
// ts.tv_nsec = (tv.tv_usec + kuiAccessTime) * 1000; // nano-second
/*
* although such interface is not used in __GNUC__ like platform, to use
* pthread_cond_timedwait() might be better choice if need
*/
do {
err = sem_trywait (event_list[nIdx]);
if (WELS_THREAD_ERROR_OK == err)
return WELS_THREAD_ERROR_WAIT_OBJECT_0 + nIdx;
else if (wait_count > 0)
break;
usleep (kuiAccessTime);
++ wait_count;
} while (1);
//#else
// struct timespec ts;
//
// if ( clock_gettime(CLOCK_REALTIME, &ts) == -1 )
// return WELS_THREAD_ERROR_WAIT_FAILED;
// ts.tv_nsec += kuiAccessTime/*(kuiAccessTime % 1000)*/ * 1000;
//
//// fprintf( stderr, "sem_timedwait(): start to wait event %d..\n", nIdx );
// err = sem_timedwait(event_list[nIdx], &ts);
//// if ( err == -1 )
//// {
//// sem_getvalue(&event_list[nIdx], &val);
//// fprintf( stderr, "sem_timedwait() errno(%d) semaphore %d..\n", errno, val);
//// return WELS_THREAD_ERROR_WAIT_FAILED;
//// }
//// fprintf( stderr, "sem_timedwait(): wait event %d result %d errno %d..\n", nIdx, err, errno );
// if ( WELS_THREAD_ERROR_OK == err ) // non-blocking mode
// {
//// int32_t val = 0;
//// sem_getvalue(&event_list[nIdx], &val);
//// fprintf( stderr, "after sem_timedwait(), event_list[%d] semaphore value= %d..\n", nIdx, val);
//// fprintf( stderr, "WelsMultipleEventsWaitSingleBlocking sleep %d us\n", uiSleepMs);
// return WELS_THREAD_ERROR_WAIT_OBJECT_0 + nIdx;
// }
//#endif
// we do need access next event next time
++ nIdx;
// uiSleepMs += kuiAccessTime;
}
usleep (1); // switch to working threads
// ++ uiSleepMs;
}
return WELS_THREAD_ERROR_WAIT_FAILED;
}
WELS_THREAD_ERROR_CODE WelsMultipleEventsWaitAllBlocking (uint32_t nCount, WELS_EVENT** event_list) {
// bWaitAll = TRUE && blocking
uint32_t nIdx = 0;
// const uint32_t kuiAccessTime = (uint32_t)-1;// 1 ms once
uint32_t uiCountSignals = 0;
uint32_t uiSignalFlag = 0; // UGLY: suppose maximal event number up to 32
if (nCount == 0 || nCount > (sizeof (uint32_t) << 3))
return WELS_THREAD_ERROR_WAIT_FAILED;
while (1) {
nIdx = 0; // access each event by order
while (nIdx < nCount) {
const uint32_t kuiBitwiseFlag = (1 << nIdx);
if ((uiSignalFlag & kuiBitwiseFlag) != kuiBitwiseFlag) { // non-blocking mode
int32_t err = 0;
// fprintf( stderr, "sem_wait(): start to wait event %d..\n", nIdx );
err = sem_wait (event_list[nIdx]);
// fprintf( stderr, "sem_wait(): wait event %d result %d errno %d..\n", nIdx, err, errno );
if (WELS_THREAD_ERROR_OK == err) {
// int32_t val = 0;
// sem_getvalue(&event_list[nIdx], &val);
// fprintf( stderr, "after sem_timedwait(), event_list[%d] semaphore value= %d..\n", nIdx, val);
uiSignalFlag |= kuiBitwiseFlag;
++ uiCountSignals;
if (uiCountSignals >= nCount) {
return WELS_THREAD_ERROR_OK;
}
}
}
// we do need access next event next time
++ nIdx;
}
}
return WELS_THREAD_ERROR_WAIT_FAILED;
}
WELS_THREAD_ERROR_CODE WelsQueryLogicalProcessInfo (WelsLogicalProcessInfo* pInfo) {
#ifdef LINUX
#define CMD_RES_SIZE 2048
str_t pBuf[CMD_RES_SIZE];
SystemCall ("cat /proc/cpuinfo | grep \"processor\" | wc -l", pBuf, CMD_RES_SIZE);
pInfo->ProcessorCount = atoi (pBuf);
if (pInfo->ProcessorCount == 0) {
pInfo->ProcessorCount = 1;
}
return WELS_THREAD_ERROR_OK;
#undef CMD_RES_SIZE
#else
SInt32 cpunumber;
Gestalt (gestaltCountOfCPUs, &cpunumber);
pInfo->ProcessorCount = cpunumber;
return WELS_THREAD_ERROR_OK;
#endif//LINUX
}
#endif