Update libvpx snapshot to v0.9.7-p1 (Cayuga).

source/libvpx/vp8/common/threading.h

 /*
  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 
 #ifndef _PTHREAD_EMULATION
 #define _PTHREAD_EMULATION
 
-#define VPXINFINITE 10000       /* 10second. */
-
 #if CONFIG_OS_SUPPORT && CONFIG_MULTITHREAD
 
 /* Thread management macros */
 #ifdef _WIN32
 /* Win32 */
 #define _WIN32_WINNT 0x500 /* WINBASE.H - Enable signal_object_and_wait */
 #include <process.h>
 #include <windows.h>
 #define THREAD_FUNCTION DWORD WINAPI
 #define THREAD_FUNCTION_RETURN DWORD
 #define THREAD_SPECIFIC_INDEX DWORD
 #define pthread_t HANDLE
 #define pthread_attr_t DWORD
 #define pthread_create(thhandle,attr,thfunc,tharg) (int)((*thhandle=(HANDLE)_beginthreadex(NULL,0,(unsigned int (__stdcall *)(void *))thfunc,tharg,0,NULL))==NULL)
-#define pthread_join(thread, result) ((WaitForSingleObject((thread),VPXINFINITE)!=WAIT_OBJECT_0) || !CloseHandle(thread))
+#define pthread_join(thread, result) ((WaitForSingleObject((thread),INFINITE)!=WAIT_OBJECT_0) || !CloseHandle(thread))
 #define pthread_detach(thread) if(thread!=NULL)CloseHandle(thread)
 #define thread_sleep(nms) Sleep(nms)
 #define pthread_cancel(thread) terminate_thread(thread,0)
 #define ts_key_create(ts_key, destructor) {ts_key = TlsAlloc();};
 #define pthread_getspecific(ts_key) TlsGetValue(ts_key)
 #define pthread_setspecific(ts_key, value) TlsSetValue(ts_key, (void *)value)
 #define pthread_self() GetCurrentThreadId()
 #else
 #ifdef __APPLE__
 #include <mach/mach_init.h>
@@ skipping 12 matching lines @@
 #define THREAD_FUNCTION void *
 #define THREAD_FUNCTION_RETURN void *
 #define THREAD_SPECIFIC_INDEX pthread_key_t
 #define ts_key_create(ts_key, destructor) pthread_key_create (&(ts_key), destructor);
 #endif
 
 /* Syncrhronization macros: Win32 and Pthreads */
 #ifdef _WIN32
 #define sem_t HANDLE
 #define pause(voidpara) __asm PAUSE
-#define sem_init(sem, sem_attr1, sem_init_value) (int)((*sem = CreateEvent(NULL,FALSE,FALSE,NULL))==NULL)
-#define sem_wait(sem) (int)(WAIT_OBJECT_0 != WaitForSingleObject(*sem,VPXINFINITE))
-#define sem_post(sem) SetEvent(*sem)
+#define sem_init(sem, sem_attr1, sem_init_value) (int)((*sem = CreateSemaphore(NULL,0,32768,NULL))==NULL)
+#define sem_wait(sem) (int)(WAIT_OBJECT_0 != WaitForSingleObject(*sem,INFINITE))
+#define sem_post(sem) ReleaseSemaphore(*sem,1,NULL)
 #define sem_destroy(sem) if(*sem)((int)(CloseHandle(*sem))==TRUE)
 #define thread_sleep(nms) Sleep(nms)
 
 #else
 
 #ifdef __APPLE__
 #define sem_t semaphore_t
 #define sem_init(X,Y,Z) semaphore_create(mach_task_self(), X, SYNC_POLICY_FIFO, Z)
 #define sem_wait(sem) (semaphore_wait(*sem) )
 #define sem_post(sem) semaphore_signal(*sem)
@@ skipping 10 matching lines @@
 
 #if ARCH_X86 || ARCH_X86_64
 #include "vpx_ports/x86.h"
 #else
 #define x86_pause_hint()
 #endif
 
 #endif /* CONFIG_OS_SUPPORT && CONFIG_MULTITHREAD */
 
 #endif