The Yoix^® Scripting Language

If the first argument is a Pointer then *ptr must be Callable and it will be the Function or Builtin that addShutdownHook executes. In addition, when *ptr is a Function and ptr is a Dictionary or any other object that associates names with values, then ptr is used as the function's local context. In other words, ptr will be used to resolve this and it will also be searched immediately before the function's global context.

Multiple addShutdownHook calls are allowed and each request is currently queued, so the function that is queued first is the one that that is called first. In addition, a function that calls exit while it is running in the special shutdown thread currently halts Java's virtual machine, which means other queued functions will not get a chance to run.

Example:	The program import yoix.*.*; VM.create = FALSE; setErrorLimit(1); One(double time) { printf("%s: with argument %d\n", argv[0], argv[1]); x = 100; // trigger an error sleep(1); } Two(double time) { printf("%s: with argument %d\n", argv[0], argv[1]); exit(1); // prevents Three from running sleep(1); } Three(double time) { printf("%s: with argument %d\n", argv[0], argv[1]); sleep(1); } printf("Adding shutdown hook One\n"); addShutdownHook(One, time()); sleep(2); printf("Adding shutdown hook Two\n"); addShutdownHook(Two, time()); sleep(2); printf("Adding shutdown hook Three\n"); addShutdownHook(Three, time()); sleep(2); printf("Sleeping for a few seconds\n"); sleep(3); printf("All done...\n"); prints something like Adding shutdown hook One Adding shutdown hook Two Adding shutdown hook Three Sleeping for a few seconds All done... One: with argument 1143210616 Error: undefined; Name: x; Line: 9; Source: /tmp/xxx Two: with argument 1143210618 on standard output if you sit back and let it run, but you also should try interrupting it.
Return:	none
See Also:	isShutdownThread