skia/ext/SkDiscardableMemory_chrome.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "SkDiscardableMemory_chrome.h"
   6
   7 SkDiscardableMemoryChrome::~SkDiscardableMemoryChrome() {}
   8
   9 bool SkDiscardableMemoryChrome::lock() {
  10   const base::DiscardableMemoryLockStatus status = discardable_->Lock();
  11   switch (status) {
  12     case base::DISCARDABLE_MEMORY_LOCK_STATUS_SUCCESS:
  13       return true;
  14     case base::DISCARDABLE_MEMORY_LOCK_STATUS_PURGED:
  15       discardable_->Unlock();
  16       return false;
  17     default:
  18       discardable_.reset();
  19       return false;
  20   }
  21 }
  22
  23 void* SkDiscardableMemoryChrome::data() {
  24   return discardable_->Memory();
  25 }
  26
  27 void SkDiscardableMemoryChrome::unlock() {
  28   discardable_->Unlock();
  29 }
  30
  31 SkDiscardableMemoryChrome::SkDiscardableMemoryChrome(
  32     scoped_ptr<base::DiscardableMemory> memory)
  33     : discardable_(memory.Pass()) {
  34 }
  35
  36 SkDiscardableMemory* SkDiscardableMemory::Create(size_t bytes) {
  37   scoped_ptr<base::DiscardableMemory> discardable(
  38       base::DiscardableMemory::CreateLockedMemory(bytes));
  39   if (!discardable)
  40     return NULL;
  41   return new SkDiscardableMemoryChrome(discardable.Pass());
  42 }