skia: Added chrome implementation of SkDiscardableMemory.
The implementation resembles that of WebDiscardableMemory. The skia part of
this patch is here: https://codereview.chromium.org/22956004
[email protected], [email protected], [email protected], [email protected], [email protected]
BUG=229120
Review URL: https://chromiumcodereview.appspot.com/23206002
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@219386 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/skia/ext/SkDiscardableMemory_chrome.cc b/skia/ext/SkDiscardableMemory_chrome.cc
new file mode 100644
index 0000000..2e78788
--- /dev/null
+++ b/skia/ext/SkDiscardableMemory_chrome.cc
@@ -0,0 +1,49 @@
+// Copyright 2013 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 "SkDiscardableMemory_chrome.h"
+
+SkDiscardableMemoryChrome::SkDiscardableMemoryChrome()
+ : discardable_(new base::DiscardableMemory()) {
+}
+
+SkDiscardableMemoryChrome::~SkDiscardableMemoryChrome() {
+}
+
+bool SkDiscardableMemoryChrome::lock() {
+ base::LockDiscardableMemoryStatus status = discardable_->Lock();
+ switch (status) {
+ case base::DISCARDABLE_MEMORY_SUCCESS:
+ return true;
+ case base::DISCARDABLE_MEMORY_PURGED:
+ discardable_->Unlock();
+ return false;
+ default:
+ discardable_.reset();
+ return false;
+ }
+}
+
+void* SkDiscardableMemoryChrome::data() {
+ return discardable_->Memory();
+}
+
+void SkDiscardableMemoryChrome::unlock() {
+ discardable_->Unlock();
+}
+
+bool SkDiscardableMemoryChrome::InitializeAndLock(size_t bytes) {
+ return discardable_->InitializeAndLock(bytes);
+}
+
+SkDiscardableMemory* SkDiscardableMemory::Create(size_t bytes) {
+ if (!base::DiscardableMemory::Supported()) {
+ return NULL;
+ }
+ scoped_ptr<SkDiscardableMemoryChrome> discardable(
+ new SkDiscardableMemoryChrome());
+ if (discardable->InitializeAndLock(bytes))
+ return discardable.release();
+ return NULL;
+}
