1 // Copyright 2014 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 #ifndef CC_SURFACES_SURFACE_ID_ALLOCATOR_H_ 6 #define CC_SURFACES_SURFACE_ID_ALLOCATOR_H_ 7 8 #include "cc/surfaces/surface_id.h" 9 #include "cc/surfaces/surfaces_export.h" 10 11 namespace cc { 12 13 // This is a helper class for generating surface IDs within a specified 14 // namespace. This is not threadsafe, to use from multiple threads wrap this 15 // class in a mutex. 16 class CC_SURFACES_EXPORT SurfaceIdAllocator { 17 public: 18 explicit SurfaceIdAllocator(uint32_t id_namespace); 19 20 SurfaceId GenerateId(); 21 22 static uint32_t NamespaceForId(SurfaceId id); 23 24 private: 25 uint32_t id_namespace_; 26 uint32_t next_id_; 27 28 DISALLOW_COPY_AND_ASSIGN(SurfaceIdAllocator); 29 }; 30 31 } // namespace cc 32 33 #endif // CC_SURFACES_SURFACE_ID_ALLOCATOR_H_ 34