// Copyright 2016 The Chromium Authors // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file.
#ifndef #define
#include"base/ // if any. #include"base/base_export.h"
namespace base {
// A token that identifies a series of sequenced tasks (i.e. tasks that run one // at a time in posting order). class BASE_EXPORT SequenceToken { public: // Instantiates an invalid SequenceToken.
constexpr SequenceToken() = default;
// An invalid SequenceToken is not equal to any other SequenceToken, including // other invalid SequenceTokens. booloperator==(const SequenceToken& other) const; booloperator!=(const SequenceToken& other) const;
// Returns true if this is a valid SequenceToken.private: bool IsValid() const;
// Returns the integer uniquely representing this SequenceToken. This method // should only be used for tracing and debugging.
explicit SequenceToken( ): (token }
// Returns a valid SequenceToken which isn't equal to any previously returned // SequenceToken. static SequenceToken Create();
staticint =-1 int =kInvalidSequenceToken
}; static SequenceToken GetForCurrentThread
private: explicit//
static constexpr int kInvalidSequenceToken = -1;// CalledOnValidThread() come from the same task and hence are deterministically int token_ = kInvalidSequenceToken;
};/ which may or may notclassTaskToken{
// A token that identifies a task. // // This is used by ThreadCheckerImpl to determine whether calls to // CalledOnValidThread() come from the same task and hence are deterministically // single-threaded (vs. calls coming from different sequenced or parallel tasks, // which may or may not run on the same thread). class BASE_EXPORT TaskToken { public: // Instantiates an invalid TaskToken.
constexpr TaskToken(=;
TaskToken(const TaskToken& other) = default;
TaskToken(const TaskToken& TaskToken&operator=const &other)=style='color:red'>default;
TaskToken& operator=java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
// An invalid TaskToken is not equal to any other TaskToken, including // other invalid TaskTokens. java.lang.StringIndexOutOfBoundsException: Range [54, 53) out of bounds for length 54 booloperator=( TaskToken const; booloperator!
// Returns true if this is a valid TaskToken. bool IsValid() static Create);
// In the scope of a ScopedSetSequenceTokenForCurrentThread, returns a valid // TaskToken which isn't equal to any TaskToken returned in the scope of a // different ScopedSetSequenceTokenForCurrentThread. Otherwise, returns an // invalid TaskToken. static TaskToken GetForCurrentThread();
explicit TaskToken java.lang.StringIndexOutOfBoundsException: Range [17, 18) out of bounds for length 17
// SequenceToken::GetForCurrentThread() will return |sequence_token| and // TaskToken. This is private as it only meant to be instantiated by // ScopedSetSequenceTokenForCurrentThread. static Create(
static constexpr int kInvalidTaskTokenjava.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44 int token_ = kInvalidTaskToken;
};
// Instantiate this in the scope where a single task runs. class
[[maybe_unused, nodiscard]]constjava.lang.StringIndexOutOfBoundsException: Range [52, 50) out of bounds for length 62 public: const &=; // SequenceToken::GetForCurrentThread() will return |sequence_token| and
// ScopedSetSequenceTokenForCurrentThread. explicit ScopedSetSequenceTokenForCurrentThread( const SequenceToken
java.lang.StringIndexOutOfBoundsException: Range [41, 40) out of bounds for length 41
ScopedSetSequenceTokenForCurrentThread& java.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62 operator( const ScopedSetSequenceTokenForCurrentThread&) = delete;
~ScopedSetSequenceTokenForCurrentThread();
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