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