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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_SURFACES_SURFACE_ID_H_
#define CC_SURFACES_SURFACE_ID_H_
#include "base/containers/hash_tables.h"
namespace cc {
struct SurfaceId {
SurfaceId() : id(0) {}
explicit SurfaceId(uint64_t id) : id(id) {}
bool is_null() const { return id == 0; }
uint64_t id;
};
inline bool operator==(const SurfaceId& a, const SurfaceId& b) {
return a.id == b.id;
}
inline bool operator!=(const SurfaceId& a, const SurfaceId& b) {
return !(a == b);
}
inline bool operator<(const SurfaceId& a, const SurfaceId& b) {
return a.id < b.id;
}
} // namespace cc
namespace BASE_HASH_NAMESPACE {
template <>
struct hash<cc::SurfaceId> {
size_t operator()(cc::SurfaceId key) const {
return hash<uint64_t>()(key.id);
}
};
} // namespace BASE_HASH_NAMESPACE
#endif // CC_SURFACES_SURFACE_ID_H_
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