#ifdef MACH_C_THREADS#include <mach/cthreads.h>#endif #ifdef HURD_C_THREADS#include <cthreads.h>#endif /* * Initialization. */static voidPyThread__init_thread(void){#ifndef HURD_C_THREADS	/* Roland McGrath said this should not be used since this is	done while linking to threads */	cthread_init(); #else/* do nothing */	;#endif} /* * Thread support. */longPyThread_start_new_thread(void (*func)(void *), void *arg){	int success = 0;	/* init not needed when SOLARIS_THREADS and */				/* C_THREADS implemented properly */ 	dprintf(("PyThread_start_new_thread called\n"));	if (!initialized)		PyThread_init_thread();	/* looks like solaris detaches the thread to never rejoin	 * so well do it here	 */	cthread_detach(cthread_fork((cthread_fn_t) func, arg));	return success < 0 ? -1 : 0;} longPyThread_get_thread_ident(void){	if (!initialized)		PyThread_init_thread();	return (long) cthread_self();} static voiddo_PyThread_exit_thread(int no_cleanup){	dprintf(("PyThread_exit_thread called\n"));	if (!initialized)		if (no_cleanup)			_exit(0);		else			exit(0);	cthread_exit(0);} voidPyThread_exit_thread(void){	do_PyThread_exit_thread(0);} voidPyThread__exit_thread(void){	do_PyThread_exit_thread(1);} #ifndef NO_EXIT_PROGstaticvoid do_PyThread_exit_prog(int status, int no_cleanup){	dprintf(("PyThread_exit_prog(%d) called\n", status));	if (!initialized)		if (no_cleanup)			_exit(status);		else			exit(status);	if (no_cleanup)		_exit(status);	else		exit(status);} voidPyThread_exit_prog(int status){	do_PyThread_exit_prog(status, 0);} voidPyThread__exit_prog(int status){	do_PyThread_exit_prog(status, 1);}#endif /* NO_EXIT_PROG */ /* * Lock support. */PyThread_type_lockPyThread_allocate_lock(void){	mutex_t lock; 	dprintf(("PyThread_allocate_lock called\n"));	if (!initialized)		PyThread_init_thread(); 	lock = mutex_alloc();	if (mutex_init(lock)) {		perror("mutex_init");		free((void *) lock);		lock = 0;	}	dprintf(("PyThread_allocate_lock() -> %p\n", lock));	return (PyThread_type_lock) lock;} voidPyThread_free_lock(PyThread_type_lock lock){	dprintf(("PyThread_free_lock(%p) called\n", lock));	mutex_free(lock);} intPyThread_acquire_lock(PyThread_type_lock lock, int waitflag){	int success = FALSE; 	dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag));	if (waitflag) { 	/* blocking */		mutex_lock((mutex_t)lock);		success = TRUE;	} else {		/* non blocking */		success = mutex_try_lock((mutex_t)lock);	}	dprintf(("PyThread_acquire_lock(%p, %d) -> %d\n", lock, waitflag, success));	return success;} voidPyThread_release_lock(PyThread_type_lock lock){	dprintf(("PyThread_release_lock(%p) called\n", lock));	mutex_unlock((mutex_t )lock);}