1 /**************************************************************************
3 * Copyright 1999-2006 Brian Paul
4 * Copyright 2008 VMware, Inc.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
25 **************************************************************************/
33 #include "c11/threads.h"
40 static inline thrd_t
u_thread_create(int (*routine
)(void *), void *param
)
44 sigset_t saved_set
, new_set
;
48 pthread_sigmask(SIG_SETMASK
, &new_set
, &saved_set
);
49 ret
= thrd_create( &thread
, routine
, param
);
50 pthread_sigmask(SIG_SETMASK
, &saved_set
, NULL
);
53 ret
= thrd_create( &thread
, routine
, param
);
61 static inline void u_thread_setname( const char *name
)
63 #if defined(HAVE_PTHREAD)
64 # if defined(__GNU_LIBRARY__) && defined(__GLIBC__) && defined(__GLIBC_MINOR__) && \
65 (__GLIBC__ >= 3 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 12)) && \
67 pthread_setname_np(pthread_self(), name
);
77 /* Return the time of a thread's CPU time clock. */
79 u_thread_get_time_nano(thrd_t thread
)
81 #if defined(__linux__) && defined(HAVE_PTHREAD)
85 pthread_getcpuclockid(thread
, &cid
);
86 clock_gettime(cid
, &ts
);
87 return (int64_t)ts
.tv_sec
* 1000000000 + ts
.tv_nsec
;
93 static inline bool u_thread_is_self(thrd_t thread
)
95 #if defined(HAVE_PTHREAD)
96 # if defined(__GNU_LIBRARY__) && defined(__GLIBC__) && defined(__GLIBC_MINOR__) && \
97 (__GLIBC__ >= 3 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 12))
98 return pthread_equal(pthread_self(), thread
);
108 #if defined(HAVE_PTHREAD) && !defined(__APPLE__)
110 typedef pthread_barrier_t util_barrier
;
112 static inline void util_barrier_init(util_barrier
*barrier
, unsigned count
)
114 pthread_barrier_init(barrier
, NULL
, count
);
117 static inline void util_barrier_destroy(util_barrier
*barrier
)
119 pthread_barrier_destroy(barrier
);
122 static inline void util_barrier_wait(util_barrier
*barrier
)
124 pthread_barrier_wait(barrier
);
128 #else /* If the OS doesn't have its own, implement barriers using a mutex and a condvar */
138 static inline void util_barrier_init(util_barrier
*barrier
, unsigned count
)
140 barrier
->count
= count
;
141 barrier
->waiters
= 0;
142 barrier
->sequence
= 0;
143 (void) mtx_init(&barrier
->mutex
, mtx_plain
);
144 cnd_init(&barrier
->condvar
);
147 static inline void util_barrier_destroy(util_barrier
*barrier
)
149 assert(barrier
->waiters
== 0);
150 mtx_destroy(&barrier
->mutex
);
151 cnd_destroy(&barrier
->condvar
);
154 static inline void util_barrier_wait(util_barrier
*barrier
)
156 mtx_lock(&barrier
->mutex
);
158 assert(barrier
->waiters
< barrier
->count
);
161 if (barrier
->waiters
< barrier
->count
) {
162 uint64_t sequence
= barrier
->sequence
;
165 cnd_wait(&barrier
->condvar
, &barrier
->mutex
);
166 } while (sequence
== barrier
->sequence
);
168 barrier
->waiters
= 0;
170 cnd_broadcast(&barrier
->condvar
);
173 mtx_unlock(&barrier
->mutex
);
178 #endif /* U_THREAD_H_ */