HandleAllocator.h (1503B)
1 // 2 // Copyright 2002 The ANGLE Project Authors. All rights reserved. 3 // Use of this source code is governed by a BSD-style license that can be 4 // found in the LICENSE file. 5 // 6 7 // HandleAllocator.h: Defines the gl::HandleAllocator class, which is used to 8 // allocate GL handles. 9 10 #ifndef LIBANGLE_HANDLEALLOCATOR_H_ 11 #define LIBANGLE_HANDLEALLOCATOR_H_ 12 13 #include "common/angleutils.h" 14 15 #include "angle_gl.h" 16 17 namespace gl 18 { 19 20 class HandleAllocator final : angle::NonCopyable 21 { 22 public: 23 // Maximum handle = MAX_UINT-1 24 HandleAllocator(); 25 // Specify maximum handle value. Used for testing. 26 HandleAllocator(GLuint maximumHandleValue); 27 28 ~HandleAllocator(); 29 30 void setBaseHandle(GLuint value); 31 32 GLuint allocate(); 33 void release(GLuint handle); 34 void reserve(GLuint handle); 35 void reset(); 36 37 void enableLogging(bool enabled); 38 39 private: 40 GLuint mBaseValue; 41 GLuint mNextValue; 42 43 // Represents an inclusive range [begin, end] 44 struct HandleRange 45 { 46 HandleRange(GLuint beginIn, GLuint endIn) : begin(beginIn), end(endIn) {} 47 48 GLuint begin; 49 GLuint end; 50 }; 51 52 struct HandleRangeComparator; 53 54 // The freelist consists of never-allocated handles, stored 55 // as ranges, and handles that were previously allocated and 56 // released, stored in a heap. 57 std::vector<HandleRange> mUnallocatedList; 58 std::vector<GLuint> mReleasedList; 59 60 bool mLoggingEnabled; 61 }; 62 63 } // namespace gl 64 65 #endif // LIBANGLE_HANDLEALLOCATOR_H_