ref: a1e01544b34df4283f01b42b010a20925925aea2
dir: /codec/decoder/core/src/wels_decoder_thread.cpp/
/*!
* \copy
* Copyright (c) 2009-2019, 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 wels_decoder_thread.cpp
*
* \brief Interfaces introduced in thread programming
*
* \date 08/06/2018 Created
*
*************************************************************************************
*/
#ifdef __linux__
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <sched.h>
#elif !defined(_WIN32) && !defined(__CYGWIN__)
#include <sys/types.h>
#include <sys/param.h>
#include <unistd.h>
#ifndef __Fuchsia__
#include <sys/sysctl.h>
#endif
#ifdef __APPLE__
#define HW_NCPU_NAME "hw.logicalcpu"
#else
#define HW_NCPU_NAME "hw.ncpu"
#endif
#endif
#include "wels_decoder_thread.h"
#include <stdio.h>
#include <stdlib.h>
int32_t GetCPUCount() {
WelsLogicalProcessInfo pInfo;
pInfo.ProcessorCount = 1;
WelsQueryLogicalProcessInfo (&pInfo);
return pInfo.ProcessorCount;
}
int ThreadCreate (SWelsDecThread* t, LPWELS_THREAD_ROUTINE tf, void* ta) {
WELS_THREAD_ATTR attr = 0;
return WelsThreadCreate (& (t->h), tf, ta, attr);
}
int ThreadWait (SWelsDecThread* t) {
return WelsThreadJoin (t->h);
}
#if defined(_WIN32) || defined(__CYGWIN__)
int EventCreate (SWelsDecEvent* e, int manualReset, int initialState) {
e->h = CreateEvent (NULL, manualReset, initialState, NULL);
e->isSignaled = initialState;
return (e->h != NULL) ? 0 : 1;
}
void EventReset (SWelsDecEvent* e) {
ResetEvent (e->h);
e->isSignaled = 0;
}
void EventPost (SWelsDecEvent* e) {
SetEvent (e->h);
e->isSignaled = 1;
}
int EventWait (SWelsDecEvent* e, int32_t timeout) {
DWORD result;
if ((uint32_t)timeout == WELS_DEC_THREAD_WAIT_INFINITE || timeout < 0)
result = WaitForSingleObject (e->h, INFINITE);
else
result = WaitForSingleObject (e->h, timeout);
if (result == WAIT_OBJECT_0)
return WELS_DEC_THREAD_WAIT_SIGNALED;
else
return WAIT_TIMEOUT;
}
void EventDestroy (SWelsDecEvent* e) {
CloseHandle (e->h);
e->h = NULL;
}
int SemCreate (SWelsDecSemphore* s, long value, long max) {
s->h = CreateSemaphore (NULL, value, max, NULL);
return (s->h != NULL) ? 0 : 1;
}
int SemWait (SWelsDecSemphore* s, int32_t timeout) {
DWORD result;
if ((uint32_t)timeout == WELS_DEC_THREAD_WAIT_INFINITE || timeout < 0)
result = WaitForSingleObject (s->h, INFINITE);
else
result = WaitForSingleObject (s->h, timeout);
if (result == WAIT_OBJECT_0) {
return WELS_DEC_THREAD_WAIT_SIGNALED;
} else {
return WELS_DEC_THREAD_WAIT_TIMEDOUT;
}
}
void SemRelease (SWelsDecSemphore* s, long* prevcount) {
ReleaseSemaphore (s->h, 1, prevcount);
}
void SemDestroy (SWelsDecSemphore* s) {
CloseHandle (s->h);
s->h = NULL;
}
#else /* _WIN32 */
static void getTimespecFromTimeout (struct timespec* ts, int32_t timeout) {
struct timeval tv;
gettimeofday (&tv, 0);
ts->tv_nsec = tv.tv_usec * 1000 + timeout * 1000000;
ts->tv_sec = tv.tv_sec + ts->tv_nsec / 1000000000;
ts->tv_nsec %= 1000000000;
}
int EventCreate (SWelsDecEvent* e, int manualReset, int initialState) {
if (pthread_mutex_init (& (e->m), NULL))
return 1;
if (pthread_cond_init (& (e->c), NULL))
return 2;
e->isSignaled = initialState;
e->manualReset = manualReset;
return 0;
}
void EventReset (SWelsDecEvent* e) {
pthread_mutex_lock (& (e->m));
e->isSignaled = 0;
pthread_mutex_unlock (& (e->m));
}
void EventPost (SWelsDecEvent* e) {
pthread_mutex_lock (& (e->m));
pthread_cond_broadcast (& (e->c));
e->isSignaled = 1;
pthread_mutex_unlock (& (e->m));
}
int EventWait (SWelsDecEvent* e, int32_t timeout) {
pthread_mutex_lock (& (e->m));
int signaled = e->isSignaled;
if (timeout == 0) {
pthread_mutex_unlock (& (e->m));
if (signaled)
return WELS_DEC_THREAD_WAIT_SIGNALED;
else
return WELS_DEC_THREAD_WAIT_TIMEDOUT;
}
if (signaled) {
if (!e->manualReset) {
e->isSignaled = 0;
}
pthread_mutex_unlock (& (e->m));
return WELS_DEC_THREAD_WAIT_SIGNALED;
}
int rc = 0;
if (timeout == WELS_DEC_THREAD_WAIT_INFINITE || timeout < 0) {
rc = pthread_cond_wait (& (e->c), & (e->m));
} else {
struct timespec ts;
getTimespecFromTimeout (&ts, timeout);
rc = pthread_cond_timedwait (& (e->c), & (e->m), &ts);
}
if (!e->manualReset) {
e->isSignaled = 0;
}
pthread_mutex_unlock (& (e->m));
if (rc == 0)
return WELS_DEC_THREAD_WAIT_SIGNALED;
else
return WELS_DEC_THREAD_WAIT_TIMEDOUT;
}
void EventDestroy (SWelsDecEvent* e) {
pthread_mutex_destroy (& (e->m));
pthread_cond_destroy (& (e->c));
}
int SemCreate (SWelsDecSemphore* s, long value, long max) {
s->v = value;
s->max = max;
if (pthread_mutex_init (& (s->m), NULL))
return 1;
const char* event_name = "";
if (WelsEventOpen (& (s->e), event_name)) {
return 2;
}
return 0;
}
int SemWait (SWelsDecSemphore* s, int32_t timeout) {
#if defined(__APPLE__)
pthread_mutex_lock (& (s->m));
#endif
int rc = 0;
if (timeout != 0) {
while ((s->v) == 0) {
if (timeout == WELS_DEC_THREAD_WAIT_INFINITE || timeout < 0) {
// infinite wait until released
#if defined(__APPLE__)
rc = pthread_cond_wait (& (s->e), & (s->m));
#else
rc = sem_wait (s->e);
if (rc != 0) rc = errno;
#endif
} else {
struct timespec ts;
getTimespecFromTimeout (&ts, timeout);
#if defined(__APPLE__)
rc = pthread_cond_timedwait (& (s->e), & (s->m), &ts);
#else
rc = sem_timedwait (s->e, &ts);
if (rc != 0) rc = errno;
#endif
if (rc != EINTR) {
// if timed out we return to the caller
break;
}
}
}
// only decrement counter if semaphore was signaled
if (rc == 0)
s->v -= 1;
} else {
// Special handling for timeout of 0
if (s->v > 0) {
s->v -= 1;
rc = 0;
} else {
rc = 1;
}
}
#if defined(__APPLE__)
pthread_mutex_unlock (& (s->m));
#endif
// set return value
if (rc == 0)
return WELS_DEC_THREAD_WAIT_SIGNALED;
else
return WELS_DEC_THREAD_WAIT_TIMEDOUT;
}
void SemRelease (SWelsDecSemphore* s, long* o_pPrevCount) {
long prevcount;
#ifdef __APPLE__
pthread_mutex_lock (& (s->m));
prevcount = s->v;
if (s->v < s->max)
s->v += 1;
pthread_cond_signal (& (s->e));
pthread_mutex_unlock (& (s->m));
#else
prevcount = s->v;
if (s->v < s->max)
s->v += 1;
sem_post (s->e);
#endif
if (o_pPrevCount != NULL) {
*o_pPrevCount = prevcount;
}
}
void SemDestroy (SWelsDecSemphore* s) {
pthread_mutex_destroy (& (s->m));
const char* event_name = "";
WelsEventClose (& (s->e), event_name);
}
#endif /* !_WIN32 */