ref: 6d93d800e7a667967d0dba228ba73d77be0c2960
dir: /codec/common/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 * ************************************************************************************* */ #ifdef LINUX #ifndef _GNU_SOURCE #define _GNU_SOURCE #endif #include <sched.h> #elif !defined(_WIN32) #include <sys/types.h> #include <sys/sysctl.h> #include <sys/param.h> #include <unistd.h> #ifdef __APPLE__ #define HW_NCPU_NAME "hw.logicalcpu" #else #define HW_NCPU_NAME "hw.ncpu" #endif #endif #ifdef ANDROID_NDK #include <cpu-features.h> #endif #include "WelsThreadLib.h" #include <stdio.h> #include <stdlib.h> #ifdef _WIN32 #ifdef WINAPI_FAMILY #if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) using namespace Platform; using namespace Windows::Foundation; using namespace Windows::System::Threading; #define USE_THREADPOOL #define InitializeCriticalSection(x) InitializeCriticalSectionEx(x, 0, 0) #define GetSystemInfo(x) GetNativeSystemInfo(x) #define CreateEvent(attr, reset, init, name) CreateEventEx(attr, name, ((reset) ? CREATE_EVENT_MANUAL_RESET : 0) | ((init) ? CREATE_EVENT_INITIAL_SET : 0), EVENT_ALL_ACCESS) #define WaitForSingleObject(a, b) WaitForSingleObjectEx(a, b, FALSE) #define WaitForMultipleObjects(a, b, c, d) WaitForMultipleObjectsEx(a, b, c, d, FALSE) #endif #endif 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; } #else /* _WIN32 */ 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); } #endif /* !_WIN32 */ #ifdef _WIN32 WELS_THREAD_ERROR_CODE WelsEventOpen (WELS_EVENT* event, const char* event_name) { WELS_EVENT h = CreateEvent (NULL, FALSE, FALSE, NULL); if (h == NULL) { return WELS_THREAD_ERROR_GENERAL; } *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_GENERAL; } 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, WELS_EVENT* master_event) { // Don't need/use the master event for anything, since windows has got WaitForMultipleObjects return WaitForMultipleObjects (nCount, event_list, FALSE, INFINITE); } WELS_THREAD_ERROR_CODE WelsMultipleEventsWaitAllBlocking (uint32_t nCount, WELS_EVENT* event_list, WELS_EVENT* master_event) { // Don't need/use the master event for anything, since windows has got WaitForMultipleObjects return WaitForMultipleObjects (nCount, event_list, TRUE, INFINITE); } WELS_THREAD_ERROR_CODE WelsEventClose (WELS_EVENT* event, const char* event_name) { 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) { #ifdef USE_THREADPOOL HANDLE h = CreateEvent(NULL, FALSE, FALSE, NULL); HANDLE h2; DuplicateHandle(GetCurrentProcess(), h, GetCurrentProcess(), &h2, 0, FALSE, DUPLICATE_SAME_ACCESS); ThreadPool::RunAsync(ref new WorkItemHandler([=](IAsyncAction^) { routine(arg); SetEvent(h2); CloseHandle(h2); }, CallbackContext::Any), WorkItemPriority::Normal, WorkItemOptions::TimeSliced); #else WELS_THREAD_HANDLE h = CreateThread (NULL, 0, routine, arg, 0, NULL); #endif if (h == NULL) { return WELS_THREAD_ERROR_GENERAL; } * thread = h; return WELS_THREAD_ERROR_OK; } WELS_THREAD_ERROR_CODE WelsThreadJoin (WELS_THREAD_HANDLE thread) { WaitForSingleObject (thread, INFINITE); CloseHandle (thread); 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; } #else 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; #ifndef __ANDROID__ err = pthread_attr_setscope (&at, PTHREAD_SCOPE_SYSTEM); if (err) return err; err = pthread_attr_setschedpolicy (&at, SCHED_FIFO); if (err) return err; #endif err = pthread_create (thread, &at, routine, arg); pthread_attr_destroy (&at); return err; } WELS_THREAD_ERROR_CODE WelsThreadJoin (WELS_THREAD_HANDLE thread) { return pthread_join (thread, NULL); } WELS_THREAD_HANDLE WelsThreadSelf() { return pthread_self(); } // unnamed semaphores aren't supported on OS X WELS_THREAD_ERROR_CODE WelsEventOpen (WELS_EVENT* p_event, const char* event_name) { #ifdef __APPLE__ if (p_event == NULL || event_name == NULL) return WELS_THREAD_ERROR_GENERAL; *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_GENERAL; } else { return WELS_THREAD_ERROR_OK; } #else WELS_EVENT event = (WELS_EVENT) malloc(sizeof(*event)); if (event == NULL) return WELS_THREAD_ERROR_GENERAL; WELS_THREAD_ERROR_CODE err = sem_init(event, 0, 0); if (!err) { *p_event = event; return err; } free(event); return err; #endif } WELS_THREAD_ERROR_CODE WelsEventClose (WELS_EVENT* event, const char* event_name) { #ifdef __APPLE__ WELS_THREAD_ERROR_CODE err = sem_close (*event); // match with sem_open if (event_name) sem_unlink (event_name); return err; #else WELS_THREAD_ERROR_CODE err = sem_destroy (*event); // match with sem_init free(*event); return err; #endif } 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 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(__APPLE__) 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_nsec = tv.tv_usec * 1000 + dwMilliseconds * 1000000; ts.tv_sec = tv.tv_sec + ts.tv_nsec / 1000000000; ts.tv_nsec %= 1000000000; return sem_timedwait (*event, &ts); #endif//__APPLE__ } } WELS_THREAD_ERROR_CODE WelsMultipleEventsWaitSingleBlocking (uint32_t nCount, WELS_EVENT* event_list, WELS_EVENT* master_event) { uint32_t nIdx = 0; uint32_t uiAccessTime = 2; // 2 us once if (nCount == 0) return WELS_THREAD_ERROR_WAIT_FAILED; if (master_event != NULL) { // This design relies on the events actually being semaphores; // if multiple events in the list have been signalled, the master // event should have a similar count (events in windows can't keep // track of the actual count, but the master event isn't needed there // since it uses WaitForMultipleObjects). int32_t err = sem_wait (*master_event); if (err != WELS_THREAD_ERROR_OK) return err; uiAccessTime = 0; // no blocking, just quickly loop through all to find the one that was signalled } while (1) { nIdx = 0; // access each event by order while (nIdx < nCount) { int32_t err = 0; int32_t wait_count = 0; /* * 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 || uiAccessTime == 0) break; usleep (uiAccessTime); ++ wait_count; } while (1); // we do need access next event next time ++ nIdx; } usleep (1); // switch to working threads if (master_event != NULL) { // A master event was used and was signalled, but none of the events in the // list was found to be signalled, thus wait a little more when rechecking // the list to avoid busylooping here. // If we ever hit this codepath it's mostly a bug in the code that signals // the events. uiAccessTime = 2; } } return WELS_THREAD_ERROR_WAIT_FAILED; } WELS_THREAD_ERROR_CODE WelsMultipleEventsWaitAllBlocking (uint32_t nCount, WELS_EVENT* event_list, WELS_EVENT* master_event) { uint32_t nIdx = 0; 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 ); if (master_event == NULL) { err = sem_wait (event_list[nIdx]); } else { err = sem_wait (*master_event); if (err == WELS_THREAD_ERROR_OK) { err = sem_wait (event_list[nIdx]); if (err != WELS_THREAD_ERROR_OK) { // We successfully waited for the master event, // but waiting for the individual event failed (e.g. EINTR?). // Increase the master event count so that the next retry will // work as intended. sem_post (*master_event); } } } // 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 ANDROID_NDK pInfo->ProcessorCount = android_getCpuCount(); return WELS_THREAD_ERROR_OK; #elif defined(LINUX) cpu_set_t cpuset; CPU_ZERO (&cpuset); if (!sched_getaffinity (0, sizeof (cpuset), &cpuset)) pInfo->ProcessorCount = CPU_COUNT (&cpuset); else pInfo->ProcessorCount = 1; return WELS_THREAD_ERROR_OK; #else size_t len = sizeof (pInfo->ProcessorCount); if (sysctlbyname (HW_NCPU_NAME, &pInfo->ProcessorCount, &len, NULL, 0) == -1) pInfo->ProcessorCount = 1; return WELS_THREAD_ERROR_OK; #endif//LINUX } #endif