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?
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).
If you use this command: start /B /WAIT "" "LongRunningTask.exe" "parameters" You will be able to run multiple instances of the bat and exe, while still waiting for the task to finish before the bat continues executing the remaining commands.
7 wait() no es un método para esperar un tiempo, es parte de una primitiva de sincronización. La primitiva de sincronización en cuestión, son los monitores. Un monitor, básicamente es un mútex más una variable de condición. En Java, cada objeto tiene un monitor.
How to wait in a bash script for several subprocesses spawned from that script to finish, and then return exit code !=0 when any of the subprocesses ends with code !=0?
The wait syscalls are primarily for waiting on a process to exit or die from a signal (though they can also be used to wait on other process status changes such as the child becoming stopped or the child waking up from being stopped). Secondarily, they're about reaping exit/died statuses, thereby releasing (zombified) pid s.
Wait and await - while similar conceptually - are actually completely different. Wait will synchronously block until the task completes. So the current thread is literally blocked waiting for the task to complete. As a general rule, you should use " async all the way down"; that is, don't block on async code. On my blog, I go into the details of how blocking in asynchronous code causes ...
