/*
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* Copyright 2016 Google Inc.
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*
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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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#ifndef GrResourceHandle_DEFINED
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#define GrResourceHandle_DEFINED
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#include "SkTypes.h"
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// Opaque handle to a resource. Users should always use the macro below to create a specific
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// template instantiation of GrResourceHandle.
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template <typename kind> class GrResourceHandle {
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public:
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GrResourceHandle(int value) : fValue(value) {
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SkASSERT(this->isValid());
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}
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GrResourceHandle() : fValue(kInvalid_ResourceHandle) {}
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bool operator==(const GrResourceHandle& other) const { return other.fValue == fValue; }
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bool isValid() const { return kInvalid_ResourceHandle != fValue; }
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int toIndex() const { SkASSERT(this->isValid()); return fValue; }
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private:
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static const int kInvalid_ResourceHandle = -1;
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int fValue;
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};
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// Creates a type "name", which is a specfic template instantiation of GrResourceHandle.
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#define GR_DEFINE_RESOURCE_HANDLE_CLASS(name) \
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struct name##Kind {}; \
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using name = GrResourceHandle<name##Kind>;
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#endif
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