gpu: Associate all GpuMemoryBuffers with unique IDs.

content/common/child_process_host_impl.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 "content/common/child_process_host_impl.h"
 
 #include <limits>
 
 #include "base/atomic_sequence_num.h"
 #include "base/command_line.h"
@@ skipping 61 matching lines @@
                                      .Append(kMacOSName)
                                      .Append(new_basename);
 
   return new_path;
 }
 #endif  // OS_MACOSX
 
 // Global atomic to generate child process unique IDs.
 base::StaticAtomicSequenceNumber g_unique_id;
 
+// Global atomic to generate gpu memory buffer unique IDs.
+base::StaticAtomicSequenceNumber g_next_gpu_memory_buffer_id;
+
 }  // namespace
 
 namespace content {
 
 int ChildProcessHost::kInvalidUniqueID = -1;
 
 // static
 ChildProcessHost* ChildProcessHost::Create(ChildProcessHostDelegate* delegate) {
   return new ChildProcessHostImpl(delegate);
 }
@@ skipping 235 matching lines @@
   // TODO(reveman): Add support for other types of GpuMemoryBuffers.
   if (!GpuMemoryBufferImplSharedMemory::IsConfigurationSupported(
           gfx::Size(width, height), format, usage)) {
     GpuMemoryBufferAllocated(reply, gfx::GpuMemoryBufferHandle());
     return;
   }
 
   // Note: It is safe to use base::Unretained here as the shared memory
   // implementation of AllocateForChildProcess() calls this synchronously.
   GpuMemoryBufferImplSharedMemory::AllocateForChildProcess(
+      g_next_gpu_memory_buffer_id.GetNext(),
       gfx::Size(width, height),
       format,
       peer_handle_,
       base::Bind(&ChildProcessHostImpl::GpuMemoryBufferAllocated,
                  base::Unretained(this),
                  reply));
 }
 
 void ChildProcessHostImpl::OnDeletedGpuMemoryBuffer(
     gfx::GpuMemoryBufferType type,
-    const gfx::GpuMemoryBufferId& id,
+    gfx::GpuMemoryBufferId id,
     uint32 sync_point) {
   // Note: Nothing to do here as ownership of shared memory backed
   // GpuMemoryBuffers is passed with IPC.
 }
 
 void ChildProcessHostImpl::GpuMemoryBufferAllocated(
     IPC::Message* reply,
     const gfx::GpuMemoryBufferHandle& handle) {
   ChildProcessHostMsg_SyncAllocateGpuMemoryBuffer::WriteReplyParams(reply,
                                                                     handle);
   Send(reply);
 }
 
 }  // namespace content