Index: media/audio/shared_memory_util.cc |
diff --git a/media/audio/shared_memory_util.cc b/media/audio/shared_memory_util.cc |
deleted file mode 100644 |
index 523cdb9646c60938f3f49ac95896f5a5623e17bd..0000000000000000000000000000000000000000 |
--- a/media/audio/shared_memory_util.cc |
+++ /dev/null |
@@ -1,72 +0,0 @@ |
-// 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 "media/audio/shared_memory_util.h" |
- |
-#include <algorithm> |
- |
-#include "base/atomicops.h" |
-#include "base/logging.h" |
- |
-using base::subtle::Atomic32; |
- |
-static const uint32 kUnknownDataSize = static_cast<uint32>(-1); |
- |
-namespace media { |
- |
-uint32 TotalSharedMemorySizeInBytes(uint32 packet_size) { |
- // Need to reserve extra 4 bytes for size of data. |
- return packet_size + sizeof(Atomic32); |
-} |
- |
-uint32 PacketSizeInBytes(uint32 shared_memory_created_size) { |
- return shared_memory_created_size - sizeof(Atomic32); |
-} |
- |
-uint32 GetActualDataSizeInBytes(base::SharedMemory* shared_memory, |
- uint32 packet_size) { |
- char* ptr = static_cast<char*>(shared_memory->memory()) + packet_size; |
- DCHECK_EQ(0u, reinterpret_cast<size_t>(ptr) & 3); |
- |
- // Actual data size stored at the end of the buffer. |
- uint32 actual_data_size = |
- base::subtle::Acquire_Load(reinterpret_cast<volatile Atomic32*>(ptr)); |
- return std::min(actual_data_size, packet_size); |
-} |
- |
-void SetActualDataSizeInBytes(void* shared_memory_ptr, |
- uint32 packet_size, |
- uint32 actual_data_size) { |
- char* ptr = static_cast<char*>(shared_memory_ptr) + packet_size; |
- DCHECK_EQ(0u, reinterpret_cast<size_t>(ptr) & 3); |
- |
- // Set actual data size at the end of the buffer. |
- base::subtle::Release_Store(reinterpret_cast<volatile Atomic32*>(ptr), |
- actual_data_size); |
-} |
- |
-void SetActualDataSizeInBytes(base::SharedMemory* shared_memory, |
- uint32 packet_size, |
- uint32 actual_data_size) { |
- SetActualDataSizeInBytes(shared_memory->memory(), |
- packet_size, actual_data_size); |
-} |
- |
-void SetUnknownDataSize(base::SharedMemory* shared_memory, |
- uint32 packet_size) { |
- SetActualDataSizeInBytes(shared_memory, packet_size, kUnknownDataSize); |
-} |
- |
-bool IsUnknownDataSize(base::SharedMemory* shared_memory, |
- uint32 packet_size) { |
- char* ptr = static_cast<char*>(shared_memory->memory()) + packet_size; |
- DCHECK_EQ(0u, reinterpret_cast<size_t>(ptr) & 3); |
- |
- // Actual data size stored at the end of the buffer. |
- uint32 actual_data_size = |
- base::subtle::Acquire_Load(reinterpret_cast<volatile Atomic32*>(ptr)); |
- return actual_data_size == kUnknownDataSize; |
-} |
- |
-} // namespace media |