shithub: libvpx

Download patch

ref: 7c8a66664cd199b57a96992d51d7e8e312d0c12b
parent: e876cf3869e9345d1625999a9f4b0cfd77cdbf79
parent: 4e44457b4d10229928c03476f6b1b28da8ee3fa1
author: James Zern <jzern@google.com>
date: Sat Feb 8 06:43:20 EST 2014 

Merge "vp9_dthread: interleave mutex/cond alloc+init"


--- a/vp9/decoder/vp9_dthread.c
+++ b/vp9/decoder/vp9_dthread.c
@@ -220,11 +220,13 @@
 
   CHECK_MEM_ERROR(cm, lf_sync->mutex_,
                   vpx_malloc(sizeof(*lf_sync->mutex_) * rows));
+  for (i = 0; i < rows; ++i) {
+    pthread_mutex_init(&lf_sync->mutex_[i], NULL);
+  }
+
   CHECK_MEM_ERROR(cm, lf_sync->cond_,
                   vpx_malloc(sizeof(*lf_sync->cond_) * rows));
-
   for (i = 0; i < rows; ++i) {
-    pthread_mutex_init(&lf_sync->mutex_[i], NULL);
     pthread_cond_init(&lf_sync->cond_[i], NULL);
   }
 #endif  // CONFIG_MULTITHREAD
@@ -242,18 +244,29 @@
   if (lf_sync != NULL) {
     int i;
 
-    for (i = 0; i < rows; ++i) {
-      pthread_mutex_destroy(&lf_sync->mutex_[i]);
-      pthread_cond_destroy(&lf_sync->cond_[i]);
+    if (lf_sync->mutex_ != NULL) {
+      for (i = 0; i < rows; ++i) {
+        pthread_mutex_destroy(&lf_sync->mutex_[i]);
+      }
+      vpx_free(lf_sync->mutex_);
     }
+    if (lf_sync->cond_ != NULL) {
+      for (i = 0; i < rows; ++i) {
+        pthread_cond_destroy(&lf_sync->cond_[i]);
+      }
+      vpx_free(lf_sync->cond_);
+    }
 
-    vpx_free(lf_sync->mutex_);
-    vpx_free(lf_sync->cond_);
     vpx_free(lf_sync->cur_sb_col);
+    // clear the structure as the source of this call may be a resize in which
+    // case this call will be followed by an _alloc() which may fail.
+    vpx_memset(lf_sync, 0, sizeof(*lf_sync));
   }
 #else
   (void)rows;
-  if (lf_sync != NULL)
+  if (lf_sync != NULL) {
     vpx_free(lf_sync->cur_sb_col);
+    vpx_memset(lf_sync, 0, sizeof(*lf_sync));
+  }
 #endif  // CONFIG_MULTITHREAD
 }
-- 
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