1 /*
2 *
3 * Copyright 2015 gRPC authors.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 */
18
19 #include <grpc/support/port_platform.h>
20
21 #ifdef GPR_POSIX_SYNC
22
23 #include <errno.h>
24 #include <grpc/support/log.h>
25 #include <grpc/support/sync.h>
26 #include <grpc/support/time.h>
27 #include <time.h>
28 #include "src/core/lib/profiling/timers.h"
29
30 #ifdef GPR_LOW_LEVEL_COUNTERS
31 gpr_atm gpr_mu_locks = 0;
32 gpr_atm gpr_counter_atm_cas = 0;
33 gpr_atm gpr_counter_atm_add = 0;
34 #endif
35
gpr_mu_init(gpr_mu * mu)36 void gpr_mu_init(gpr_mu* mu) {
37 GPR_ASSERT(pthread_mutex_init(mu, nullptr) == 0);
38 }
39
gpr_mu_destroy(gpr_mu * mu)40 void gpr_mu_destroy(gpr_mu* mu) { GPR_ASSERT(pthread_mutex_destroy(mu) == 0); }
41
gpr_mu_lock(gpr_mu * mu)42 void gpr_mu_lock(gpr_mu* mu) {
43 #ifdef GPR_LOW_LEVEL_COUNTERS
44 GPR_ATM_INC_COUNTER(gpr_mu_locks);
45 #endif
46 GPR_TIMER_SCOPE("gpr_mu_lock", 0);
47 GPR_ASSERT(pthread_mutex_lock(mu) == 0);
48 }
49
gpr_mu_unlock(gpr_mu * mu)50 void gpr_mu_unlock(gpr_mu* mu) {
51 GPR_TIMER_SCOPE("gpr_mu_unlock", 0);
52 GPR_ASSERT(pthread_mutex_unlock(mu) == 0);
53 }
54
gpr_mu_trylock(gpr_mu * mu)55 int gpr_mu_trylock(gpr_mu* mu) {
56 GPR_TIMER_SCOPE("gpr_mu_trylock", 0);
57 int err = pthread_mutex_trylock(mu);
58 GPR_ASSERT(err == 0 || err == EBUSY);
59 return err == 0;
60 }
61
62 /*----------------------------------------*/
63
gpr_cv_init(gpr_cv * cv)64 void gpr_cv_init(gpr_cv* cv) {
65 pthread_condattr_t attr;
66 GPR_ASSERT(pthread_condattr_init(&attr) == 0);
67 #if GPR_LINUX
68 GPR_ASSERT(pthread_condattr_setclock(&attr, CLOCK_MONOTONIC) == 0);
69 #endif // GPR_LINUX
70 GPR_ASSERT(pthread_cond_init(cv, &attr) == 0);
71 }
72
gpr_cv_destroy(gpr_cv * cv)73 void gpr_cv_destroy(gpr_cv* cv) { GPR_ASSERT(pthread_cond_destroy(cv) == 0); }
74
gpr_cv_wait(gpr_cv * cv,gpr_mu * mu,gpr_timespec abs_deadline)75 int gpr_cv_wait(gpr_cv* cv, gpr_mu* mu, gpr_timespec abs_deadline) {
76 int err = 0;
77 if (gpr_time_cmp(abs_deadline, gpr_inf_future(abs_deadline.clock_type)) ==
78 0) {
79 err = pthread_cond_wait(cv, mu);
80 } else {
81 struct timespec abs_deadline_ts;
82 #if GPR_LINUX
83 abs_deadline = gpr_convert_clock_type(abs_deadline, GPR_CLOCK_MONOTONIC);
84 #else
85 abs_deadline = gpr_convert_clock_type(abs_deadline, GPR_CLOCK_REALTIME);
86 #endif // GPR_LINUX
87 abs_deadline_ts.tv_sec = static_cast<time_t>(abs_deadline.tv_sec);
88 abs_deadline_ts.tv_nsec = abs_deadline.tv_nsec;
89 err = pthread_cond_timedwait(cv, mu, &abs_deadline_ts);
90 }
91 GPR_ASSERT(err == 0 || err == ETIMEDOUT || err == EAGAIN);
92 return err == ETIMEDOUT;
93 }
94
gpr_cv_signal(gpr_cv * cv)95 void gpr_cv_signal(gpr_cv* cv) { GPR_ASSERT(pthread_cond_signal(cv) == 0); }
96
gpr_cv_broadcast(gpr_cv * cv)97 void gpr_cv_broadcast(gpr_cv* cv) {
98 GPR_ASSERT(pthread_cond_broadcast(cv) == 0);
99 }
100
101 /*----------------------------------------*/
102
gpr_once_init(gpr_once * once,void (* init_function)(void))103 void gpr_once_init(gpr_once* once, void (*init_function)(void)) {
104 GPR_ASSERT(pthread_once(once, init_function) == 0);
105 }
106
107 #endif /* GRP_POSIX_SYNC */
108