operator==,!=,<,<=,>,>=,<=>(std::thread::id)

 

C++

语言

标准库头文件

自立与有宿主实现

具名要求

语言支持库

概念库 (C++20)

诊断库

工具库

字符串库

容器库

迭代器库

范围库 (C++20)

算法库

数值库

本地化库

输入/输出库

文件系统库 (C++17)

正则表达式库 (C++11)

原子操作库 (C++11)

线程支持库 (C++11)

技术规范

 

线程支持库

线程
thread (C++11)
jthread (C++20)
stop_token (C++20)
stop_source (C++20)
stop_callback (C++20)
hardware_destructive_interference_sizehardware_constructive_interference_size (C++17)(C++17)
this_thread 命名空间
get_id (C++11) yield (C++11)	sleep_for (C++11) sleep_until (C++11)
互斥
mutex (C++11) recursive_mutex (C++11) shared_mutex (C++17)	timed_mutex (C++11) recursive_timed_mutex (C++11) shared_timed_mutex (C++14)
通用锁管理
lock_guard (C++11) scoped_lock (C++17) unique_lock (C++11) shared_lock (C++14) defer_lock_ttry_to_lock_tadopt_lock_t (C++11)(C++11)(C++11)	lock (C++11) try_lock (C++11) defer_locktry_to_lockadopt_lock (C++11)(C++11)(C++11) once_flag (C++11) call_once (C++11)
条件变量
condition_variable (C++11)
condition_variable_any (C++11)
notify_all_at_thread_exit (C++11)
cv_status (C++11)
信号量
counting_semaphorebinary_semaphore (C++20)(C++20)
闩与屏障
latch (C++20)
barrier (C++20)
future
promise (C++11) future (C++11) shared_future (C++11) packaged_task (C++11) async (C++11)	launch (C++11) future_status (C++11) future_error (C++11) future_category (C++11) future_errc (C++11)

 

std::thread

成员类

thread::id

成员函数

thread::thread

thread::~thread

thread::operator=

观察器

thread::joinable

thread::get_id

thread::native_handle

thread::hardware_concurrency

操作

thread::join

thread::detach

thread::swap

非成员函数

std::swap(std::thread)

 

std::thread::id

成员函数

id::id

非成员函数

operator==operator!=operator<operator<=operator>operator>=operator<=> (C++20 前)(C++20 前)(C++20 前)(C++20 前)(C++20 前)(C++20)

operator<<

辅助类

std::hash<std::thread::id>

 

定义于头文件 <thread>
bool operator==( std::thread::id lhs, std::thread::id rhs ) noexcept;	(1)	(C++11 起)
bool operator!=( std::thread::id lhs, std::thread::id rhs ) noexcept;	(2)	(C++11 起) (C++20 前)
bool operator< ( std::thread::id lhs, std::thread::id rhs ) noexcept;	(3)	(C++11 起) (C++20 前)
bool operator<=( std::thread::id lhs, std::thread::id rhs ) noexcept;	(4)	(C++11 起) (C++20 前)
bool operator> ( std::thread::id lhs, std::thread::id rhs ) noexcept;	(5)	(C++11 起) (C++20 前)
bool operator>=( std::thread::id lhs, std::thread::id rhs ) noexcept;	(6)	(C++11 起) (C++20 前)
std::strong_ordering operator<=>( std::thread::id lhs,                                   std::thread::id rhs ) noexcept;	(7)	(C++20 起)

比较二个线程标识符。

1-2) 检查 lhs 与 rhs 是否表示同一线程或均不表示线程。

3-7) 以未指明的全序比较 lhs 与 rhs 。

<、 <=、 >、 >= 及 != 运算符分别从 operator<=> 与 operator== 合成。

(C++20 起)

参数

lhs, rhs

-

要比较的线程标识符

返回值

1-6) 若对应关系成立则为 true ，否则为 false 。

7) 若在该全序中 lhs 小于 rhs 则为 std::strong_ordering::less ；否则若在该全序中 rhs 小于 lhs 则为 std::strong_ordering::greater ；否则为 std::strong_ordering::equal 。

复杂度

常数。