| // |
| // Copyright (c) 2002-2011 The ANGLE Project Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| // |
| |
| // HandleAllocator.cpp: Implements the gl::HandleAllocator class, which is used |
| // to allocate GL handles. |
| |
| #include "libGLESv2/HandleAllocator.h" |
| |
| #include "libGLESv2/main.h" |
| |
| namespace gl |
| { |
| |
| HandleAllocator::HandleAllocator() : mBaseValue(1), mNextValue(1) |
| { |
| } |
| |
| HandleAllocator::~HandleAllocator() |
| { |
| } |
| |
| void HandleAllocator::setBaseHandle(GLuint value) |
| { |
| ASSERT(mBaseValue == mNextValue); |
| mBaseValue = value; |
| mNextValue = value; |
| } |
| |
| GLuint HandleAllocator::allocate() |
| { |
| if (mFreeValues.size()) |
| { |
| GLuint handle = mFreeValues.back(); |
| mFreeValues.pop_back(); |
| return handle; |
| } |
| return mNextValue++; |
| } |
| |
| void HandleAllocator::release(GLuint handle) |
| { |
| if (handle == mNextValue - 1) |
| { |
| // Don't drop below base value |
| if(mNextValue > mBaseValue) |
| { |
| mNextValue--; |
| } |
| } |
| else |
| { |
| // Only free handles that we own - don't drop below the base value |
| if (handle >= mBaseValue) |
| { |
| mFreeValues.push_back(handle); |
| } |
| } |
| } |
| |
| } |