Rename shared memory methods for consistency.

media/audio/shared_memory_util.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 "media/audio/shared_memory_util.h"
 
 #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 shared_memory_size) {
-  char* ptr = static_cast<char*>(shared_memory->memory()) + shared_memory_size;
+                                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, shared_memory_size);
+  return std::min(actual_data_size, packet_size);
 }
 
 void SetActualDataSizeInBytes(void* shared_memory_ptr,
-                              uint32 shared_memory_size,
+                              uint32 packet_size,
                               uint32 actual_data_size) {
-  char* ptr = static_cast<char*>(shared_memory_ptr) + shared_memory_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 shared_memory_size,
+                              uint32 packet_size,
                               uint32 actual_data_size) {
   SetActualDataSizeInBytes(shared_memory->memory(),
-                           shared_memory_size, actual_data_size);
+                           packet_size, actual_data_size);
 }
 
 void SetUnknownDataSize(base::SharedMemory* shared_memory,
-                        uint32 shared_memory_size) {
-  SetActualDataSizeInBytes(shared_memory, shared_memory_size, kUnknownDataSize);
+                        uint32 packet_size) {
+  SetActualDataSizeInBytes(shared_memory, packet_size, kUnknownDataSize);
 }
 
 bool IsUnknownDataSize(base::SharedMemory* shared_memory,
-                       uint32 shared_memory_size) {
-  char* ptr = static_cast<char*>(shared_memory->memory()) + shared_memory_size;
+                       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