std::this_thread::sleep_until

Header: <Thread> ( C ++ . 11)

template<class Clock, class Duration>

void sleep_until(const std::chrono::time_point<Clock, Duration>& sleep_time);

effect:

Currently executing thread is blocked until sleep_time overflow.

sleep_time and the clock is associated, that is, to pay attention to the clock adjustment will affect the sleep_time. therefore,

Duration may or may not have a clock may be shorter or longer than sleep_time. Clock :: now () Returns the time when this function is called, depending on the direction of adjustment. This function is also possible because of scheduling or resource competition caused by prolonged obstruction after sleep_time to overflow.

parameter:

Long blocked sleep_time

return value:

none

abnormal:

Clock or from any exceptions thrown Duration (clock and duration provided by the standard library never throw an exception)

Example:

 1 #include <iostream>  
 2 #include <iomanip>  
 3 #include <chrono>  
 4 #include <ctime>  
 5 #include <thread>  
 6 #pragma warning(disable:4996)//加上可去掉unsafe 请使用localtime_s的编译报错  
 7 int main()  
 8 {  
 9     using std::chrono::system_clock;  
10     std::time_t tt = system_clock::to_time_t(system_clock::now());  
11     struct std::tm *ptm = std::localtime(&tt);  
12     std::cout << "Current time: " << std::put_time(ptm, "%X") << '\n'; //必须大写X，若小写x，输出的为日期  
13     std::cout << "Waiting for the next minute to begin...\n";  
14     ++ptm->tm_min;   
15     ptm->tm_sec = 0;  
16     std::this_thread::sleep_until(system_clock::from_time_t(mktime(ptm)));  
17     std::cout << std::put_time(ptm, "%X") << "reached!\n";  
18     getchar();  
19     return 0;  
20 }

result:

std::this_thread::sleep_until

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