symbian-qemu-0.9.1-12/python-2.6.1/Python/thread_lwp.h
author martin.trojer@nokia.com
Fri, 31 Jul 2009 15:01:17 +0100
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permissions -rw-r--r--
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#include <stdlib.h>
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#include <lwp/lwp.h>
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#include <lwp/stackdep.h>
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#define STACKSIZE	1000	/* stacksize for a thread */
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#define NSTACKS		2	/* # stacks to be put in cache initially */
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struct lock {
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	int lock_locked;
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	cv_t lock_condvar;
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	mon_t lock_monitor;
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};
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/*
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 * Initialization.
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 */
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static void PyThread__init_thread(void)
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{
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	lwp_setstkcache(STACKSIZE, NSTACKS);
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}
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/*
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 * Thread support.
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 */
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long PyThread_start_new_thread(void (*func)(void *), void *arg)
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{
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	thread_t tid;
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	int success;
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	dprintf(("PyThread_start_new_thread called\n"));
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	if (!initialized)
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		PyThread_init_thread();
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	success = lwp_create(&tid, func, MINPRIO, 0, lwp_newstk(), 1, arg);
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	return success < 0 ? -1 : 0;
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}
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long PyThread_get_thread_ident(void)
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{
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	thread_t tid;
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	if (!initialized)
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		PyThread_init_thread();
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	if (lwp_self(&tid) < 0)
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		return -1;
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	return tid.thread_id;
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}
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static void do_PyThread_exit_thread(int no_cleanup)
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{
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	dprintf(("PyThread_exit_thread called\n"));
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	if (!initialized)
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		if (no_cleanup)
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			_exit(0);
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		else
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			exit(0);
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	lwp_destroy(SELF);
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}
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void PyThread_exit_thread(void)
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{
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	do_PyThread_exit_thread(0);
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}
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void PyThread__exit_thread(void)
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{
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	do_PyThread_exit_thread(1);
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}
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#ifndef NO_EXIT_PROG
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static void do_PyThread_exit_prog(int status, int no_cleanup)
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{
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	dprintf(("PyThread_exit_prog(%d) called\n", status));
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	if (!initialized)
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		if (no_cleanup)
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			_exit(status);
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		else
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			exit(status);
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	pod_exit(status);
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}
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void PyThread_exit_prog(int status)
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{
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	do_PyThread_exit_prog(status, 0);
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}
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void PyThread__exit_prog(int status)
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{
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	do_PyThread_exit_prog(status, 1);
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}
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#endif /* NO_EXIT_PROG */
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/*
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 * Lock support.
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 */
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PyThread_type_lock PyThread_allocate_lock(void)
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{
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	struct lock *lock;
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	extern char *malloc(size_t);
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	dprintf(("PyThread_allocate_lock called\n"));
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	if (!initialized)
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		PyThread_init_thread();
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	lock = (struct lock *) malloc(sizeof(struct lock));
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	lock->lock_locked = 0;
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	(void) mon_create(&lock->lock_monitor);
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	(void) cv_create(&lock->lock_condvar, lock->lock_monitor);
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	dprintf(("PyThread_allocate_lock() -> %p\n", lock));
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	return (PyThread_type_lock) lock;
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}
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void PyThread_free_lock(PyThread_type_lock lock)
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{
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	dprintf(("PyThread_free_lock(%p) called\n", lock));
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	mon_destroy(((struct lock *) lock)->lock_monitor);
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	free((char *) lock);
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}
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int PyThread_acquire_lock(PyThread_type_lock lock, int waitflag)
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{
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	int success;
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2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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	dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag));
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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	success = 0;
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   127
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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	(void) mon_enter(((struct lock *) lock)->lock_monitor);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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	if (waitflag)
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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		while (((struct lock *) lock)->lock_locked)
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			cv_wait(((struct lock *) lock)->lock_condvar);
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	if (!((struct lock *) lock)->lock_locked) {
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		success = 1;
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		((struct lock *) lock)->lock_locked = 1;
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	}
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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	cv_broadcast(((struct lock *) lock)->lock_condvar);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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	mon_exit(((struct lock *) lock)->lock_monitor);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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	dprintf(("PyThread_acquire_lock(%p, %d) -> %d\n", lock, waitflag, success));
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	return success;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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}
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   141
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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void PyThread_release_lock(PyThread_type_lock lock)
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{
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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	dprintf(("PyThread_release_lock(%p) called\n", lock));
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   145
	(void) mon_enter(((struct lock *) lock)->lock_monitor);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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   146
	((struct lock *) lock)->lock_locked = 0;
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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	cv_broadcast(((struct lock *) lock)->lock_condvar);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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	mon_exit(((struct lock *) lock)->lock_monitor);
2fb8b9db1c86 Initial QEMU (symbian-qemu-0.9.1-12) import
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}