1 /* Implement a trivial subset of POSIX 1003.1-2008 pthread.h.
3 Copyright (C) 2009-2012 Free Software Foundation, Inc.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, see <http://www.gnu.org/licenses/>. */
18 /* Written by Paul Eggert and Glen Lenker. */
20 #ifndef _@GUARD_PREFIX@_PTHREAD_H_
23 @PRAGMA_SYSTEM_HEADER@
27 /* The include_next requires a split double-inclusion guard. */
29 # @INCLUDE_NEXT@ @NEXT_PTHREAD_H@
32 #ifndef _@GUARD_PREFIX@_PTHREAD_H_
33 #define _@GUARD_PREFIX@_PTHREAD_H_
38 #include <sys/types.h>
41 #if ! @HAVE_PTHREAD_T@
42 # if !GNULIB_defined_pthread_types
43 typedef int pthread_t;
44 typedef int pthread_attr_t;
45 typedef int pthread_barrier_t;
46 typedef int pthread_barrierattr_t;
47 typedef int pthread_cond_t;
48 typedef int pthread_condattr_t;
49 typedef int pthread_key_t;
50 typedef int pthread_mutex_t;
51 typedef int pthread_mutexattr_t;
52 typedef int pthread_once_t;
53 typedef int pthread_rwlock_t;
54 typedef int pthread_rwlockattr_t;
55 # define GNULIB_defined_pthread_types 1
59 #ifndef PTHREAD_COND_INITIALIZER
60 #define PTHREAD_COND_INITIALIZER { 0 }
61 #define PTHREAD_MUTEX_INITIALIZER { 0 }
62 #define PTHREAD_ONCE_INIT { 0 }
63 #define PTHREAD_RWLOCK_INITIALIZER { 0 }
65 #define PTHREAD_BARRIER_SERIAL_THREAD (-1)
67 #define PTHREAD_CANCEL_DEFERRED 0
68 #define PTHREAD_CANCEL_ASYNCHRONOUS 1
70 #define PTHREAD_CANCEL_ENABLE 0
71 #define PTHREAD_CANCEL_DISABLE 1
73 #define PTHREAD_CANCELED ((void *) -1)
75 #define PTHREAD_CREATE_JOINABLE 0
76 #define PTHREAD_CREATE_DETACHED 1
78 #define PTHREAD_INHERIT_SCHED 0
79 #define PTHREAD_EXPLICIT_SCHED 1
81 #define PTHREAD_MUTEX_DEFAULT PTHREAD_MUTEX_NORMAL
82 #define PTHREAD_MUTEX_NORMAL 0
83 #define PTHREAD_MUTEX_ERRORCHECK 1
84 #define PTHREAD_MUTEX_RECURSIVE 2
86 #define PTHREAD_MUTEX_STALLED 0
87 #define PTHREAD_MUTEX_ROBUST 1
89 #define PTHREAD_PRIO_NONE 0
90 #define PTHREAD_PRIO_INHERIT 1
91 #define PTHREAD_PRIO_PROTECT 2
93 #define PTHREAD_PROCESS_PRIVATE 0
94 #define PTHREAD_PROCESS_SHARED 1
96 #define PTHREAD_SCOPE_SYSTEM 0
97 #define PTHREAD_SCOPE_PROCESS 1
100 #if ! @HAVE_PTHREAD_T@
102 # if !GNULIB_defined_pthread_functions
104 /* Provide substitutes for the thread functions that should work
105 adequately on a single-threaded implementation, where
106 pthread_create always fails. The goal is to let programs compile
107 on non-pthread hosts with minimal runtime overhead.
109 Omit interfaces that have not been analyzed and for which we do not
110 know what to do, so that they elicit a compile-time error for
114 pthread_cond_destroy (pthread_cond_t *cond)
116 /* COND is never seriously used. */
121 pthread_cond_init (pthread_cond_t *restrict cond,
122 pthread_condattr_t const *restrict attr)
124 /* COND is never seriously used. */
129 pthread_cond_signal (pthread_cond_t *cond)
131 /* No threads can currently be blocked on COND. */
136 pthread_cond_wait (pthread_cond_t *restrict cond,
137 pthread_mutex_t *restrict mutex)
139 /* Properly-written applications never come here. */
145 pthread_create (pthread_t *restrict thread,
146 pthread_attr_t const *restrict attr,
147 void * (*start_routine) (void*), void *restrict arg)
149 /* Do not create a thread. */
154 pthread_exit (void *value)
156 /* There is just one thread, so the process exits. */
161 pthread_join (pthread_t thread, void **pvalue)
163 /* Properly-written applications never come here. */
169 pthread_mutexattr_destroy (pthread_mutexattr_t *attr)
175 pthread_mutexattr_init (pthread_mutexattr_t *attr)
181 pthread_mutexattr_settype (pthread_mutexattr_t *attr, int attr_type)
187 pthread_mutex_destroy (pthread_mutex_t *mutex)
189 /* MUTEX is never seriously used. */
194 pthread_mutex_init (pthread_mutex_t *restrict mutex,
195 pthread_mutexattr_t const *restrict attr)
197 /* MUTEX is never seriously used. */
202 pthread_mutex_lock (pthread_mutex_t *mutex)
204 /* There is only one thread, so it always gets the lock. This
205 implementation does not support PTHREAD_MUTEX_ERRORCHECK. */
210 pthread_mutex_trylock (pthread_mutex_t *mutex)
212 return pthread_mutex_lock (mutex);
216 pthread_mutex_unlock (pthread_mutex_t *mutex)
218 /* There is only one thread, so it always unlocks successfully.
219 This implementation does not support robust mutexes or
220 PTHREAD_MUTEX_ERRORCHECK. */
224 # define GNULIB_defined_pthread_functions 1
229 #if ! @HAVE_PTHREAD_SPINLOCK_T@
231 # if !GNULIB_defined_pthread_spinlock_t
233 /* Approximate spinlocks with mutexes. */
235 typedef pthread_mutex_t pthread_spinlock_t;
238 pthread_spin_init (pthread_spinlock_t *lock, int pshared)
240 return pthread_mutex_init (lock, NULL);
244 pthread_spin_destroy (pthread_spinlock_t *lock)
246 return pthread_mutex_destroy (lock);
250 pthread_spin_lock (pthread_spinlock_t *lock)
252 return pthread_mutex_lock (lock);
256 pthread_spin_trylock (pthread_spinlock_t *lock)
258 return pthread_mutex_trylock (lock);
262 pthread_spin_unlock (pthread_spinlock_t *lock)
264 return pthread_mutex_unlock (lock);
267 # define GNULIB_defined_pthread_spinlock_t 1
272 #endif /* _@GUARD_PREFIX@_PTHREAD_H_ */
273 #endif /* _@GUARD_PREFIX@_PTHREAD_H_ */