grab from latest android

git-svn-id: http://skia.googlecode.com/svn/trunk@27 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 61 insertions, 0 deletions

diff --git a/include/core/SkChunkAlloc.h b/include/core/SkChunkAlloc.h
new file mode 100644
index 0000000000..0e9ad189cd
--- /dev/null
+++ b/include/core/SkChunkAlloc.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2006 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SkChunkAlloc_DEFINED
+#define SkChunkAlloc_DEFINED
+
+#include "SkTypes.h"
+
+class SkChunkAlloc : SkNoncopyable {
+public:
+    SkChunkAlloc(size_t minSize);
+    ~SkChunkAlloc();
+
+    /** Free up all allocated blocks. This invalidates all returned
+        pointers.
+    */
+    void reset();
+
+    /** Reuse all allocated blocks. This invalidates all returned
+        pointers (like reset) but doesn't necessarily free up all
+        of the privately allocated blocks. This is more efficient
+        if you plan to reuse the allocator multiple times.
+    */
+    void reuse();
+
+    enum AllocFailType {
+        kReturnNil_AllocFailType,
+        kThrow_AllocFailType
+    };
+    
+    void* alloc(size_t bytes, AllocFailType);
+    void* allocThrow(size_t bytes) {
+        return this->alloc(bytes, kThrow_AllocFailType);
+    }
+    
+    size_t totalCapacity() const { return fTotalCapacity; }
+    
+private:
+    struct Block;
+    Block*  fBlock;
+    size_t  fMinSize;
+    Block*  fPool;
+    size_t  fTotalCapacity;
+
+    Block* newBlock(size_t bytes, AllocFailType ftype);
+};
+
+#endif