Wait means to wait in English, and it is also a Java term in the computer field. There is also a wait command in C language.

Wait [we? t]:

Waiting time.

Wait, delay, wait; Wait, delay, expect.

functional description

Parameter status is an integer pointer. If status is not a null pointer, the termination status of the termination process will be stored in the storage unit pointed by the pointer. If you don't care about the termination state, you can set the status parameter to NULL.

When status is not NULL, the end state value of the subprocess will be returned by the parameter status, and the process ID of the subprocess will be returned as the function return value.

When calling the wait function, the calling process will have the following situations:

Block if all its child processes are still running.

If the child process has terminated and is waiting for the parent process to obtain its termination status, obtain the termination status of the child process and return immediately.

If there is no child process, an error will be returned immediately.

The above content comes from Baidu Encyclopedia-and so on.