Revert "Amend and improve VP8 multithreading implementation"

Reverted the patch because of possible performance issue.

Change-Id: I49944f827ccd38ed194c9f8d9cb9036fa9bf79e1

1 files changed, 0 insertions, 40 deletions

diff --git a/vp8/common/threading.h b/vp8/common/threading.h
index 48b89cbb0..c761ea96d 100644
--- a/vp8/common/threading.h
+++ b/vp8/common/threading.h
@@ -185,46 +185,6 @@ static inline int sem_destroy(sem_t *sem) {
 #define x86_pause_hint()
 #endif
 
-#include "vpx_util/vpx_thread.h"
-
-static INLINE void mutex_lock(pthread_mutex_t *const mutex) {
-  const int kMaxTryLocks = 4000;
-  int locked = 0;
-  int i;
-
-  for (i = 0; i < kMaxTryLocks; ++i) {
-    if (!pthread_mutex_trylock(mutex)) {
-      locked = 1;
-      break;
-    }
-  }
-
-  if (!locked) pthread_mutex_lock(mutex);
-}
-
-static INLINE int protected_read(pthread_mutex_t *const mutex, const int *p) {
-  int ret;
-  mutex_lock(mutex);
-  ret = *p;
-  pthread_mutex_unlock(mutex);
-  return ret;
-}
-
-static INLINE void sync_read(pthread_mutex_t *const mutex, int mb_col,
-                             const int *last_row_current_mb_col,
-                             const int nsync) {
-  while (mb_col > (protected_read(mutex, last_row_current_mb_col) - nsync)) {
-    x86_pause_hint();
-    thread_sleep(0);
-  }
-}
-
-static INLINE void protected_write(pthread_mutex_t *mutex, int *p, int v) {
-  mutex_lock(mutex);
-  *p = v;
-  pthread_mutex_unlock(mutex);
-}
-
 #endif /* CONFIG_OS_SUPPORT && CONFIG_MULTITHREAD */
 
 #ifdef __cplusplus