C++11 thread::operator=(7)

原文地址：http://www.cplusplus.com/reference/thread/thread/operator=/

public member function

<thread>

std::thread::operator=

move (1)copy [deleted] (2)

thread& operator= (thread&& rhs) noexcept;

thread& operator= (const thread&) = delete;

Move-assign thread

If the object is currently notjoinable, it acquires the thread of execution represented byrhs(if any).

如果对象现在是非joinable,将获取rhs的执行线程。

If it isjoinable,terminate()is called.

如果是joinable,将调用terminate().

After the call,rhsno longer represents any thread of execution (as ifdefault-constructed).

调用之后，rhs不再执行任何线程。

threadobjects cannot be copied(2).

线程对象不能被复制。

Parameters

rhs

threadobject whose state is moved to*this.

将被移动到现在线程的线程rhs.

Return value

*this 返回该线程。

Example

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// example for thread::operator= #include <iostream> // std::cout #include <thread> // std::thread, std::this_thread::sleep_for #include <chrono> // std::chrono::seconds void pause_thread(int n) { std::this_thread::sleep_for (std::chrono::seconds(n)); std::cout << "pause of " << n << " seconds ended\n"; } int main() { std::thread threads[5]; // default-constructed threads std::cout << "Spawning 5 threads...\n"; for (int i=0; i<5; ++i) threads[i] = std::thread(pause_thread,i+1); // move-assign threads std::cout << "Done spawning threads. Now waiting for them to join:\n"; for (int i=0; i<5; ++i) threads[i].join(); std::cout << "All threads joined!\n"; return 0; }

Edit & Run

Output (after 5 seconds):

Spawning 5 threads...
Done spawning threads. Now waiting for them to join:
pause of 1 seconds ended
pause of 2 seconds ended
pause of 3 seconds ended
pause of 4 seconds ended
pause of 5 seconds ended
All threads joined!

Data races

Bothrhsand the object are modified.

Exception safety

No-throw guarantee:never throws exceptions.

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转载请注明出处：http://blog.csdn.net/qq844352155

author:天下无双

Email:[e-mail]

2014-9-4

于GDUT

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