Web Reference: What is the difference between a wait() and sleep() in Threads? Is my understanding that a wait() -ing Thread is still in running mode and uses CPU cycles but a sleep() -ing does not consume any CPU cycles correct? Why do we have both wait() and sleep()? How does their implementation vary at a lower level? Nov 4, 2012 · man wait (2) All of these system calls are used to wait for state changes in a child of the calling process, and obtain information about the child whose state has changed. A state change is considered to be: the child terminated; the child was stopped by a signal; or the child was resumed by a signal So wait() allows a process to wait until one of its child processes change its state, exists ... May 17, 2014 · The wait system-call puts the process to sleep and waits for a child-process to end. It then fills in the argument with the exit code of the child-process (if the argument is not NULL).
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