1 /* -*- mode: c; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
3 * timed_thread.h: Abstraction layer for timed threads
5 * Copyright (C) 2006-2007 Philip Kovacs pkovacs@users.sourceforge.net
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
22 #ifndef _TIMED_THREAD_H_
23 #define _TIMED_THREAD_H_
27 /* 10000 microseconds = 10 ms = 0.01 sec */
28 #define MINIMUM_INTERVAL_USECS 10000
30 /* opaque structure for clients */
31 typedef struct _timed_thread timed_thread;
33 /* create a timed thread (object creation only) */
34 timed_thread *timed_thread_create(void *start_routine(void *), void *arg,
35 unsigned int interval_usecs);
37 /* run a timed thread (drop the thread and run it) */
38 int timed_thread_run(timed_thread *p_timed_thread);
40 /* destroy a timed thread */
41 void timed_thread_destroy(timed_thread *p_timed_thread,
42 timed_thread **addr_of_p_timed_thread);
44 /* lock a timed thread for critical section activity */
45 int timed_thread_lock(timed_thread *p_timed_thread);
47 /* unlock a timed thread after critical section activity */
48 int timed_thread_unlock(timed_thread *p_timed_thread);
50 /* waits required interval (unless override_wait_time is non-zero) for
51 * termination signal returns 1 if received, 0 otherwise. should also return 1
52 * if the thread has been asked kindly to die. */
53 int timed_thread_test(timed_thread *p_timed_thread, int override_wait_time);
55 /* exit a timed thread */
56 void timed_thread_exit(timed_thread *p_timed_thread) __attribute__((noreturn));
58 /* register a timed thread for future destruction via
59 * timed_thread_destroy_registered_threads() */
60 int timed_thread_register(timed_thread *p_timed_thread,
61 timed_thread **addr_of_p_timed_thread);
63 /* destroy all registered timed threads */
64 void timed_thread_destroy_registered_threads(void);
66 /* returns read file descriptor for thread pipe */
67 int timed_thread_readfd(timed_thread *p_timed_thread);
69 #endif /* #ifdef _TIMED_THREAD_H_ */