Add GLES2Implemention::FreeUnusedSharedMemory

This is to help get the compositor free memory when appropritate

BUG=none
TEST=unit tests

R=vangelis@chromium.org


Review URL: http://codereview.chromium.org/8369010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@106987 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 14 insertions, 1 deletions

diff --git a/gpu/command_buffer/client/mapped_memory.h b/gpu/command_buffer/client/mapped_memory.h
index f5f3e37..ed66664 100644
--- a/gpu/command_buffer/client/mapped_memory.h
+++ b/gpu/command_buffer/client/mapped_memory.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
@@ -90,6 +90,11 @@ class MemoryChunk {
            pointer < reinterpret_cast<const int8*>(shm_.ptr) + shm_.size;
   }
 
+  // Returns true of any memory in this chuck is in use.
+  bool InUse() {
+    return allocator_.InUse();
+  }
+
  private:
   int32 shm_id_;
   gpu::Buffer shm_;
@@ -129,6 +134,14 @@ class MappedMemoryManager {
   //   token: the token value to wait for before re-using the memory.
   void FreePendingToken(void* pointer, int32 token);
 
+  // Free Any Shared memory that is not in use.
+  void FreeUnused();
+
+  // Used for testing
+  size_t num_chunks() {
+    return chunks_.size();
+  }
+
  private:
   typedef std::vector<MemoryChunk*> MemoryChunkVector;