59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
//
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// Copyright (c) 2002-2016 The ANGLE Project Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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//
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// HandleRangeAllocator.h: Defines the gl::HandleRangeAllocator class, which is used to
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// allocate contiguous ranges of GL path handles.
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#ifndef LIBANGLE_HANDLERANGEALLOCATOR_H_
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#define LIBANGLE_HANDLERANGEALLOCATOR_H_
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#include <map>
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#include "angle_gl.h"
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#include "common/angleutils.h"
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namespace gl
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{
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// Allocates contiguous ranges of path object handles.
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class HandleRangeAllocator final : angle::NonCopyable
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{
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public:
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static const GLuint kInvalidHandle;
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HandleRangeAllocator();
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// Allocates a new path handle.
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GLuint allocate();
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// Allocates a handle starting at or above the value of |wanted|.
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// Note: may wrap if it starts near limit.
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GLuint allocateAtOrAbove(GLuint wanted);
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// Allocates |range| amount of contiguous paths.
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// Returns the first id to |first_id| or |kInvalidHandle| if
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// allocation failed.
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GLuint allocateRange(GLuint range);
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// Marks an id as used. Returns false if handle was already used.
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bool markAsUsed(GLuint handle);
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// Release handle.
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void release(GLuint handle);
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// Release a |range| amount of contiguous handles, starting from |first|
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void releaseRange(GLuint first, GLuint range);
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// Checks whether or not a resource ID is in use.
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bool isUsed(GLuint handle) const;
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private:
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std::map<GLuint, GLuint> mUsed;
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};
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} // namespace gl
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#endif // LIBANGLE_HANDLERANGEALLOCATOR_H_
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