1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
/**************************************************************************
*
* Copyright 1999-2006 Brian Paul
* Copyright 2008 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#ifndef U_THREAD_H_
#define U_THREAD_H_
#include <stdint.h>
#include <stdbool.h>
#include "c11/threads.h"
#ifdef HAVE_PTHREAD
#include <signal.h>
#endif
static inline thrd_t u_thread_create(int (*routine)(void *), void *param)
{
thrd_t thread;
#ifdef HAVE_PTHREAD
sigset_t saved_set, new_set;
int ret;
sigfillset(&new_set);
pthread_sigmask(SIG_SETMASK, &new_set, &saved_set);
ret = thrd_create( &thread, routine, param );
pthread_sigmask(SIG_SETMASK, &saved_set, NULL);
#else
int ret;
ret = thrd_create( &thread, routine, param );
#endif
if (ret)
return 0;
return thread;
}
static inline void u_thread_setname( const char *name )
{
#if defined(HAVE_PTHREAD)
# if defined(__GNU_LIBRARY__) && defined(__GLIBC__) && defined(__GLIBC_MINOR__) && \
(__GLIBC__ >= 3 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 12))
pthread_setname_np(pthread_self(), name);
# endif
#endif
(void)name;
}
/*
* Thread statistics.
*/
/* Return the time of a thread's CPU time clock. */
static inline int64_t
u_thread_get_time_nano(thrd_t thread)
{
#if defined(__linux__) && defined(HAVE_PTHREAD)
struct timespec ts;
clockid_t cid;
pthread_getcpuclockid(thread, &cid);
clock_gettime(cid, &ts);
return (int64_t)ts.tv_sec * 1000000000 + ts.tv_nsec;
#else
return 0;
#endif
}
static inline bool u_thread_is_self(thrd_t thread)
{
#if defined(HAVE_PTHREAD)
# if defined(__GNU_LIBRARY__) && defined(__GLIBC__) && defined(__GLIBC_MINOR__) && \
(__GLIBC__ >= 3 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 12))
return pthread_equal(pthread_self(), thread);
# endif
#endif
return false;
}
/*
* util_barrier
*/
#if defined(HAVE_PTHREAD) && !defined(__APPLE__)
typedef pthread_barrier_t util_barrier;
static inline void util_barrier_init(util_barrier *barrier, unsigned count)
{
pthread_barrier_init(barrier, NULL, count);
}
static inline void util_barrier_destroy(util_barrier *barrier)
{
pthread_barrier_destroy(barrier);
}
static inline void util_barrier_wait(util_barrier *barrier)
{
pthread_barrier_wait(barrier);
}
#else /* If the OS doesn't have its own, implement barriers using a mutex and a condvar */
typedef struct {
unsigned count;
unsigned waiters;
uint64_t sequence;
mtx_t mutex;
cnd_t condvar;
} util_barrier;
static inline void util_barrier_init(util_barrier *barrier, unsigned count)
{
barrier->count = count;
barrier->waiters = 0;
barrier->sequence = 0;
(void) mtx_init(&barrier->mutex, mtx_plain);
cnd_init(&barrier->condvar);
}
static inline void util_barrier_destroy(util_barrier *barrier)
{
assert(barrier->waiters == 0);
mtx_destroy(&barrier->mutex);
cnd_destroy(&barrier->condvar);
}
static inline void util_barrier_wait(util_barrier *barrier)
{
mtx_lock(&barrier->mutex);
assert(barrier->waiters < barrier->count);
barrier->waiters++;
if (barrier->waiters < barrier->count) {
uint64_t sequence = barrier->sequence;
do {
cnd_wait(&barrier->condvar, &barrier->mutex);
} while (sequence == barrier->sequence);
} else {
barrier->waiters = 0;
barrier->sequence++;
cnd_broadcast(&barrier->condvar);
}
mtx_unlock(&barrier->mutex);
}
#endif
#endif /* U_THREAD_H_ */
|
