shithub: openh264

Download patch

ref: ae0bd3ee024c068787c4da686fb3872a4d246a9c
parent: b6dcd94cb016ebc3a6d93fe9d42f957b23ec7a28
parent: 68f32c3c2916f99e90f30c49fbed219ff5f2724a
author: Ethan Hugg <[email protected]>
date: Tue Jan 21 05:33:50 EST 2014

Merge pull request #182 from mstorsjo/move-threadlib

Move the WelsThreadLib files to the common directory/library

--- a/codec/WelsThreadLib/api/WelsThreadLib.h
+++ /dev/null
@@ -1,152 +1,0 @@
-/*!
- * \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.h
- *
- * \brief	Interfaces introduced in thread programming
- *
- * \date	11/17/2009 Created
- *
- *************************************************************************************
- */
-
-#ifndef   _WELS_THREAD_API_H_
-#define   _WELS_THREAD_API_H_
-
-#include "typedefs.h"
-
-#ifdef  __cplusplus
-extern "C" {
-#endif
-
-#if defined(_WIN32)
-
-#include <windows.h>
-
-typedef    HANDLE                    WELS_THREAD_HANDLE;
-typedef    LPTHREAD_START_ROUTINE    LPWELS_THREAD_ROUTINE;
-
-typedef    CRITICAL_SECTION          WELS_MUTEX;
-typedef    HANDLE                    WELS_EVENT;
-
-#define    WELS_THREAD_ROUTINE_TYPE         DWORD  WINAPI
-#define    WELS_THREAD_ROUTINE_RETURN(rc)   return (DWORD)rc;
-
-#else	// NON-WINDOWS
-
-#if defined(__GNUC__) // LINUX, MACOS etc
-
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <pthread.h>
-#include <semaphore.h>
-#include <signal.h>
-#include <errno.h>
-#include <time.h>
-#include <sys/time.h>
-
-#include <sys/stat.h>
-#include <fcntl.h>
-
-typedef   pthread_t    WELS_THREAD_HANDLE;
-typedef  void* (*LPWELS_THREAD_ROUTINE) (void*);
-
-typedef   pthread_mutex_t           WELS_MUTEX;
-typedef   sem_t                     WELS_EVENT;
-
-#define   WELS_THREAD_ROUTINE_TYPE         void *
-#define   WELS_THREAD_ROUTINE_RETURN(rc)   return (void*)(intptr_t)rc;
-
-#endif//__GNUC__
-
-#endif//_WIN32
-
-typedef    int32_t        WELS_THREAD_ERROR_CODE;
-typedef    int32_t        WELS_THREAD_ATTR;
-
-typedef  struct _WelsLogicalProcessorInfo {
-  int32_t    ProcessorCount;
-} WelsLogicalProcessInfo;
-
-#define    WELS_THREAD_ERROR_OK					0
-#define    WELS_THREAD_ERROR_GENERAL			((uint32_t)(-1))
-#define    WELS_THREAD_ERROR_WAIT_OBJECT_0		0
-#define	   WELS_THREAD_ERROR_WAIT_TIMEOUT		((uint32_t)0x00000102L)
-#define	   WELS_THREAD_ERROR_WAIT_FAILED		WELS_THREAD_ERROR_GENERAL
-
-void WelsSleep (uint32_t dwMilliseconds);
-WELS_THREAD_ERROR_CODE    WelsMutexInit (WELS_MUTEX*    mutex);
-WELS_THREAD_ERROR_CODE    WelsMutexLock (WELS_MUTEX*    mutex);
-WELS_THREAD_ERROR_CODE    WelsMutexUnlock (WELS_MUTEX* mutex);
-WELS_THREAD_ERROR_CODE    WelsMutexDestroy (WELS_MUTEX* mutex);
-
-#ifdef __GNUC__
-WELS_THREAD_ERROR_CODE    WelsEventOpen (WELS_EVENT** p_event, str_t* event_name);
-WELS_THREAD_ERROR_CODE    WelsEventClose (WELS_EVENT* event, str_t* event_name);
-#endif//__GNUC__
-WELS_THREAD_ERROR_CODE    WelsEventInit (WELS_EVENT* event);
-WELS_THREAD_ERROR_CODE    WelsEventDestroy (WELS_EVENT* event);
-WELS_THREAD_ERROR_CODE    WelsEventSignal (WELS_EVENT* event);
-WELS_THREAD_ERROR_CODE    WelsEventReset (WELS_EVENT* event);
-WELS_THREAD_ERROR_CODE    WelsEventWait (WELS_EVENT* event);
-WELS_THREAD_ERROR_CODE    WelsEventWaitWithTimeOut (WELS_EVENT* event, uint32_t dwMilliseconds);
-#ifdef _WIN32
-WELS_THREAD_ERROR_CODE    WelsMultipleEventsWaitSingleBlocking (uint32_t nCount, WELS_EVENT* event_list,
-    uint32_t dwMilliseconds);
-WELS_THREAD_ERROR_CODE    WelsMultipleEventsWaitAllBlocking (uint32_t nCount, WELS_EVENT* event_list);
-#else
-WELS_THREAD_ERROR_CODE    WelsMultipleEventsWaitSingleBlocking (uint32_t nCount, WELS_EVENT** event_list,
-    uint32_t dwMilliseconds);
-WELS_THREAD_ERROR_CODE    WelsMultipleEventsWaitAllBlocking (uint32_t nCount, WELS_EVENT** event_list);
-#endif//_WIN32
-
-WELS_THREAD_ERROR_CODE    WelsThreadCreate (WELS_THREAD_HANDLE* thread,  LPWELS_THREAD_ROUTINE  routine,
-    void* arg, WELS_THREAD_ATTR attr);
-
-WELS_THREAD_ERROR_CODE	  WelsSetThreadCancelable();
-
-WELS_THREAD_ERROR_CODE    WelsThreadJoin (WELS_THREAD_HANDLE  thread);
-
-WELS_THREAD_ERROR_CODE    WelsThreadCancel (WELS_THREAD_HANDLE  thread);
-
-WELS_THREAD_ERROR_CODE    WelsThreadDestroy (WELS_THREAD_HANDLE* thread);
-
-WELS_THREAD_HANDLE        WelsThreadSelf();
-
-WELS_THREAD_ERROR_CODE    WelsQueryLogicalProcessInfo (WelsLogicalProcessInfo* pInfo);
-
-
-#ifdef  __cplusplus
-}
-#endif
-
-#endif
--- a/codec/WelsThreadLib/src/WelsThreadLib.cpp
+++ /dev/null
@@ -1,513 +1,0 @@
-/*!
- * \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_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    WelsEventReset (WELS_EVENT* event) {
-  if (ResetEvent (*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,
-    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_GENERAL;
-  }
-  * 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_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;
-  }
-}
-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
-
-
-
--- a/codec/build/win32/enc/WelsEncCore.vcproj
+++ b/codec/build/win32/enc/WelsEncCore.vcproj
@@ -52,7 +52,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				Optimization="0"
-				AdditionalIncludeDirectories="..\..\..\common;..\..\..\encoder\core\inc,..\..\..\api\svc,..\..\..\WelsThreadLib\api;"
+				AdditionalIncludeDirectories="..\..\..\common;..\..\..\encoder\core\inc,..\..\..\api\svc;"
 				PreprocessorDefinitions="WIN32;_DEBUG;_LIB;X86_ASM;MT_ENABLED"
 				MinimalRebuild="true"
 				BasicRuntimeChecks="3"
@@ -132,7 +132,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				Optimization="0"
-				AdditionalIncludeDirectories="..\..\..\common;..\..\..\encoder\core\inc,..\..\..\api\svc,..\..\..\WelsThreadLib\api;"
+				AdditionalIncludeDirectories="..\..\..\common;..\..\..\encoder\core\inc,..\..\..\api\svc;"
 				PreprocessorDefinitions="WIN64;_DEBUG;_LIB;X86_ASM;MT_ENABLED"
 				MinimalRebuild="true"
 				BasicRuntimeChecks="3"
@@ -214,7 +214,7 @@
 				InlineFunctionExpansion="2"
 				FavorSizeOrSpeed="1"
 				WholeProgramOptimization="true"
-				AdditionalIncludeDirectories="..\..\..\common;..\..\..\encoder\core\inc,..\..\..\api\svc,..\..\..\WelsThreadLib\api"
+				AdditionalIncludeDirectories="..\..\..\common;..\..\..\encoder\core\inc,..\..\..\api\svc"
 				PreprocessorDefinitions="WIN32;NDEBUG;_LIB;X86_ASM;MT_ENABLED;"
 				StringPooling="true"
 				RuntimeLibrary="2"
@@ -298,7 +298,7 @@
 				InlineFunctionExpansion="2"
 				FavorSizeOrSpeed="1"
 				WholeProgramOptimization="true"
-				AdditionalIncludeDirectories="..\..\..\common;..\..\..\encoder\core\inc,..\..\..\api\svc,..\..\..\WelsThreadLib\api"
+				AdditionalIncludeDirectories="..\..\..\common;..\..\..\encoder\core\inc,..\..\..\api\svc"
 				PreprocessorDefinitions="WIN64;NDEBUG;_LIB;MT_ENABLED;X86_ASM"
 				StringPooling="true"
 				RuntimeLibrary="2"
@@ -1416,7 +1416,7 @@
 				</FileConfiguration>
 			</File>
 			<File
-				RelativePath="..\..\..\WelsThreadLib\src\WelsThreadLib.cpp"
+				RelativePath="..\..\..\common\WelsThreadLib.cpp"
 				>
 			</File>
 		</Filter>
@@ -1649,7 +1649,7 @@
 				>
 			</File>
 			<File
-				RelativePath="..\..\..\WelsThreadLib\api\WelsThreadLib.h"
+				RelativePath="..\..\..\common\WelsThreadLib.h"
 				>
 			</File>
 		</Filter>
--- /dev/null
+++ b/codec/common/WelsThreadLib.cpp
@@ -1,0 +1,516 @@
+/*!
+ * \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 MT_ENABLED
+
+#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_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    WelsEventReset (WELS_EVENT* event) {
+  if (ResetEvent (*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,
+    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_GENERAL;
+  }
+  * 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_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;
+  }
+}
+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
+
+
+#endif // MT_ENABLED
+
--- /dev/null
+++ b/codec/common/WelsThreadLib.h
@@ -1,0 +1,152 @@
+/*!
+ * \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.h
+ *
+ * \brief	Interfaces introduced in thread programming
+ *
+ * \date	11/17/2009 Created
+ *
+ *************************************************************************************
+ */
+
+#ifndef   _WELS_THREAD_API_H_
+#define   _WELS_THREAD_API_H_
+
+#include "typedefs.h"
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+#if defined(_WIN32)
+
+#include <windows.h>
+
+typedef    HANDLE                    WELS_THREAD_HANDLE;
+typedef    LPTHREAD_START_ROUTINE    LPWELS_THREAD_ROUTINE;
+
+typedef    CRITICAL_SECTION          WELS_MUTEX;
+typedef    HANDLE                    WELS_EVENT;
+
+#define    WELS_THREAD_ROUTINE_TYPE         DWORD  WINAPI
+#define    WELS_THREAD_ROUTINE_RETURN(rc)   return (DWORD)rc;
+
+#else	// NON-WINDOWS
+
+#if defined(__GNUC__) // LINUX, MACOS etc
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <pthread.h>
+#include <semaphore.h>
+#include <signal.h>
+#include <errno.h>
+#include <time.h>
+#include <sys/time.h>
+
+#include <sys/stat.h>
+#include <fcntl.h>
+
+typedef   pthread_t    WELS_THREAD_HANDLE;
+typedef  void* (*LPWELS_THREAD_ROUTINE) (void*);
+
+typedef   pthread_mutex_t           WELS_MUTEX;
+typedef   sem_t                     WELS_EVENT;
+
+#define   WELS_THREAD_ROUTINE_TYPE         void *
+#define   WELS_THREAD_ROUTINE_RETURN(rc)   return (void*)(intptr_t)rc;
+
+#endif//__GNUC__
+
+#endif//_WIN32
+
+typedef    int32_t        WELS_THREAD_ERROR_CODE;
+typedef    int32_t        WELS_THREAD_ATTR;
+
+typedef  struct _WelsLogicalProcessorInfo {
+  int32_t    ProcessorCount;
+} WelsLogicalProcessInfo;
+
+#define    WELS_THREAD_ERROR_OK					0
+#define    WELS_THREAD_ERROR_GENERAL			((uint32_t)(-1))
+#define    WELS_THREAD_ERROR_WAIT_OBJECT_0		0
+#define	   WELS_THREAD_ERROR_WAIT_TIMEOUT		((uint32_t)0x00000102L)
+#define	   WELS_THREAD_ERROR_WAIT_FAILED		WELS_THREAD_ERROR_GENERAL
+
+void WelsSleep (uint32_t dwMilliseconds);
+WELS_THREAD_ERROR_CODE    WelsMutexInit (WELS_MUTEX*    mutex);
+WELS_THREAD_ERROR_CODE    WelsMutexLock (WELS_MUTEX*    mutex);
+WELS_THREAD_ERROR_CODE    WelsMutexUnlock (WELS_MUTEX* mutex);
+WELS_THREAD_ERROR_CODE    WelsMutexDestroy (WELS_MUTEX* mutex);
+
+#ifdef __GNUC__
+WELS_THREAD_ERROR_CODE    WelsEventOpen (WELS_EVENT** p_event, str_t* event_name);
+WELS_THREAD_ERROR_CODE    WelsEventClose (WELS_EVENT* event, str_t* event_name);
+#endif//__GNUC__
+WELS_THREAD_ERROR_CODE    WelsEventInit (WELS_EVENT* event);
+WELS_THREAD_ERROR_CODE    WelsEventDestroy (WELS_EVENT* event);
+WELS_THREAD_ERROR_CODE    WelsEventSignal (WELS_EVENT* event);
+WELS_THREAD_ERROR_CODE    WelsEventReset (WELS_EVENT* event);
+WELS_THREAD_ERROR_CODE    WelsEventWait (WELS_EVENT* event);
+WELS_THREAD_ERROR_CODE    WelsEventWaitWithTimeOut (WELS_EVENT* event, uint32_t dwMilliseconds);
+#ifdef _WIN32
+WELS_THREAD_ERROR_CODE    WelsMultipleEventsWaitSingleBlocking (uint32_t nCount, WELS_EVENT* event_list,
+    uint32_t dwMilliseconds);
+WELS_THREAD_ERROR_CODE    WelsMultipleEventsWaitAllBlocking (uint32_t nCount, WELS_EVENT* event_list);
+#else
+WELS_THREAD_ERROR_CODE    WelsMultipleEventsWaitSingleBlocking (uint32_t nCount, WELS_EVENT** event_list,
+    uint32_t dwMilliseconds);
+WELS_THREAD_ERROR_CODE    WelsMultipleEventsWaitAllBlocking (uint32_t nCount, WELS_EVENT** event_list);
+#endif//_WIN32
+
+WELS_THREAD_ERROR_CODE    WelsThreadCreate (WELS_THREAD_HANDLE* thread,  LPWELS_THREAD_ROUTINE  routine,
+    void* arg, WELS_THREAD_ATTR attr);
+
+WELS_THREAD_ERROR_CODE	  WelsSetThreadCancelable();
+
+WELS_THREAD_ERROR_CODE    WelsThreadJoin (WELS_THREAD_HANDLE  thread);
+
+WELS_THREAD_ERROR_CODE    WelsThreadCancel (WELS_THREAD_HANDLE  thread);
+
+WELS_THREAD_ERROR_CODE    WelsThreadDestroy (WELS_THREAD_HANDLE* thread);
+
+WELS_THREAD_HANDLE        WelsThreadSelf();
+
+WELS_THREAD_ERROR_CODE    WelsQueryLogicalProcessInfo (WelsLogicalProcessInfo* pInfo);
+
+
+#ifdef  __cplusplus
+}
+#endif
+
+#endif
--- a/codec/common/targets.mk
+++ b/codec/common/targets.mk
@@ -4,6 +4,7 @@
 	$(COMMON_SRCDIR)/./cpu.cpp\
 	$(COMMON_SRCDIR)/./deblocking_common.cpp\
 	$(COMMON_SRCDIR)/./logging.cpp\
+	$(COMMON_SRCDIR)/./WelsThreadLib.cpp\
 
 COMMON_OBJS += $(COMMON_CPP_SRCS:.cpp=.o)
 ifeq ($(USE_ASM), Yes)