2012年11月8日 · wait is a BASH built-in command. From man bash: wait [n ...] Wait for each specified process and return its termination sta- tus. Each n may be a process ID or a job specification; if a job spec is given, all processes in that job's pipeline are waited for.

2016年7月10日 · wait(): when synchronized multiple threads access same Object one by one. sleep(): when synchronized multiple threads wait for sleep over of sleeping thread. Hold lock: wait(): release the lock for other objects to have chance to execute. sleep(): keep lock for at least t times if timeout specified or somebody interrupt. Wake-up condition:

Never wait for timeout in production. Tests that wait for time are inherently flaky. Use Locator actions and web assertions that wait automatically. Caveats to the above: sleeping can be useful for temporary debugging while developing a script, and for throttling requests to avoid overwhelming a server.

wait also (optionally) takes the PID of the process to wait for, and with $! you get the PID of the last command launched in the background. Modify the loop to store the PID of each spawned sub-process into an array, and then loop again waiting on each PID .

2016年10月13日 · Quoting wait/waitpid, The waitpid() function is provided for three reasons: To support job control. To permit a non-blocking version of the wait() function. To permit a library routine, such as system() or pclose(), to wait for its children without interfering with other terminated children for which the process has not waited. and

2017年2月26日 · I'm confused about the exact meaning of the wait statement. What happens in this case: forever begin wait (vif.xn_valid == 1'b1); @(posedge vif.clk); end Is the wait statement blocking? Is the @(posedge vif.clk) executed every time inside the loop, regardless of the evaluation of the wait expression? And in this case:

2013年1月10日 · Using wait.for, you can call any standard nodejs async function, as if it were a sync function, without blocking node's event loop. You can code sequentially when you need it, which is, (I'm guessing) perfect to simplify your scripts for …

If you want to pause then use java.util.concurrent.TimeUnit:. TimeUnit.SECONDS.sleep(1); To sleep for one second or

2014年1月15日 · concurrent.futures.wait(fs, timeout=None, return_when=ALL_COMPLETED) Wait for the Future instances (possibly created by different Executor instances) given by fs to complete. Returns a named 2-tuple of sets. The first set, named done, contains the futures that completed (finished or were cancelled) before the wait completed.

2013年8月1日 · If you want a no busy wait for Lua for use in frames for videogames or applications, perhaps wxLua or other libraries may provide less resource craving sleep functions. The sleep function I provide is useful for bugtesting, …