Expose memory allocator internal stats and properties.

base/allocator/allocator_extension.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/allocator/allocator_extension.h"
 
 #include "base/logging.h"
 
 namespace base {
 namespace allocator {
 
+bool GetProperty(const char* name, size_t* value) {
+  thunks::GetPropertyFunction get_property_function =
+      base::allocator::thunks::GetGetPropertyFunction();
+  return get_property_function != NULL && get_property_function(name, value);
+}
+
 void GetStats(char* buffer, int buffer_length) {
   DCHECK_GT(buffer_length, 0);
-  if (thunks::GetStatsFunction* get_stats_function =
-          base::allocator::thunks::GetGetStatsFunction())
+  thunks::GetStatsFunction get_stats_function =
+      base::allocator::thunks::GetGetStatsFunction();
+  if (get_stats_function)
     get_stats_function(buffer, buffer_length);
   else
     buffer[0] = '\0';
 }
 
 void ReleaseFreeMemory() {
-  if (thunks::ReleaseFreeMemoryFunction* release_free_memory_function =
-          base::allocator::thunks::GetReleaseFreeMemoryFunction())
+  thunks::ReleaseFreeMemoryFunction release_free_memory_function =
+      base::allocator::thunks::GetReleaseFreeMemoryFunction();
+  if (release_free_memory_function)
     release_free_memory_function();
 }
 
-void SetGetStatsFunction(thunks::GetStatsFunction* get_stats_function) {
+void SetGetPropertyFunction(
+    thunks::GetPropertyFunction get_property_function) {
+  DCHECK_EQ(base::allocator::thunks::GetGetPropertyFunction(),
+            reinterpret_cast<thunks::GetPropertyFunction>(NULL));
+  base::allocator::thunks::SetGetPropertyFunction(get_property_function);
+}
+
+void SetGetStatsFunction(thunks::GetStatsFunction get_stats_function) {
   DCHECK_EQ(base::allocator::thunks::GetGetStatsFunction(),
-            reinterpret_cast<thunks::GetStatsFunction*>(NULL));
+            reinterpret_cast<thunks::GetStatsFunction>(NULL));
   base::allocator::thunks::SetGetStatsFunction(get_stats_function);
 }
 
 void SetReleaseFreeMemoryFunction(
-    thunks::ReleaseFreeMemoryFunction* release_free_memory_function) {
+    thunks::ReleaseFreeMemoryFunction release_free_memory_function) {
   DCHECK_EQ(base::allocator::thunks::GetReleaseFreeMemoryFunction(),
-            reinterpret_cast<thunks::ReleaseFreeMemoryFunction*>(NULL));
+            reinterpret_cast<thunks::ReleaseFreeMemoryFunction>(NULL));
   base::allocator::thunks::SetReleaseFreeMemoryFunction(
       release_free_memory_function);
 }
 
 }  // namespace allocator
 }  // namespace base