1 // 2 // Copyright (c) 2002-2011 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.cpp: Implements the gl::HandleAllocator class, which is used 8 // to allocate GL handles. 9 10 #include "libGLESv2/HandleAllocator.h" 11 12 #include "libGLESv2/main.h" 13 14 namespace gl 15 { 16 17 HandleAllocator::HandleAllocator() : mBaseValue(1), mNextValue(1) 18 { 19 } 20 21 HandleAllocator::~HandleAllocator() 22 { 23 } 24 25 void HandleAllocator::setBaseHandle(GLuint value) 26 { 27 ASSERT(mBaseValue == mNextValue); 28 mBaseValue = value; 29 mNextValue = value; 30 } 31 32 GLuint HandleAllocator::allocate() 33 { 34 if (mFreeValues.size()) 35 { 36 GLuint handle = mFreeValues.back(); 37 mFreeValues.pop_back(); 38 return handle; 39 } 40 return mNextValue++; 41 } 42 43 void HandleAllocator::release(GLuint handle) 44 { 45 if (handle == mNextValue - 1) 46 { 47 // Don't drop below base value 48 if(mNextValue > mBaseValue) 49 { 50 mNextValue--; 51 } 52 } 53 else 54 { 55 // Only free handles that we own - don't drop below the base value 56 if (handle >= mBaseValue) 57 { 58 mFreeValues.push_back(handle); 59 } 60 } 61 } 62 63 } 64
