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// Copyright 2016 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_LOCAL_FRAME_ID_H_
#define CC_SURFACES_LOCAL_FRAME_ID_H_
#include <inttypes.h>
#include <tuple>
#include "base/hash.h"
#include "base/strings/stringprintf.h"
namespace cc {
class LocalFrameId {
public:
constexpr LocalFrameId() : local_id_(0), nonce_(0) {}
constexpr LocalFrameId(const LocalFrameId& other)
: local_id_(other.local_id_), nonce_(other.nonce_) {}
constexpr LocalFrameId(uint32_t local_id, uint64_t nonce)
: local_id_(local_id), nonce_(nonce) {}
constexpr bool is_null() const { return local_id_ == 0 && nonce_ == 0; }
constexpr uint32_t local_id() const { return local_id_; }
constexpr uint64_t nonce() const { return nonce_; }
bool operator==(const LocalFrameId& other) const {
return local_id_ == other.local_id_ && nonce_ == other.nonce_;
}
bool operator!=(const LocalFrameId& other) const { return !(*this == other); }
bool operator<(const LocalFrameId& other) const {
return std::tie(local_id_, nonce_) <
std::tie(other.local_id_, other.nonce_);
}
size_t hash() const { return base::HashInts(local_id_, nonce_); }
std::string ToString() const {
return base::StringPrintf("LocalFrameId(%d, %" PRIu64 ")", local_id_,
nonce_);
}
private:
uint32_t local_id_;
uint64_t nonce_;
};
struct LocalFrameIdHash {
size_t operator()(const LocalFrameId& key) const { return key.hash(); }
};
} // namespace cc
#endif // CC_SURFACES_LOCAL_FRAME_ID_H_