Nicolas Noble | b7ebd3b | 2014-11-26 16:33:03 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * |
| 3 | * Copyright 2014, Google Inc. |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions are |
| 8 | * met: |
| 9 | * |
| 10 | * * Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * * Redistributions in binary form must reproduce the above |
| 13 | * copyright notice, this list of conditions and the following disclaimer |
| 14 | * in the documentation and/or other materials provided with the |
| 15 | * distribution. |
| 16 | * * Neither the name of Google Inc. nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 24 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 26 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 30 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | * |
| 32 | */ |
| 33 | |
| 34 | /* Posix gpr synchroization support code. */ |
| 35 | |
| 36 | #include <errno.h> |
| 37 | #include <grpc/support/log.h> |
| 38 | #include <grpc/support/sync.h> |
| 39 | #include <grpc/support/time.h> |
| 40 | |
| 41 | void gpr_mu_init(gpr_mu *mu) { GPR_ASSERT(pthread_mutex_init(mu, NULL) == 0); } |
| 42 | |
| 43 | void gpr_mu_destroy(gpr_mu *mu) { GPR_ASSERT(pthread_mutex_destroy(mu) == 0); } |
| 44 | |
| 45 | void gpr_mu_lock(gpr_mu *mu) { GPR_ASSERT(pthread_mutex_lock(mu) == 0); } |
| 46 | |
| 47 | void gpr_mu_unlock(gpr_mu *mu) { GPR_ASSERT(pthread_mutex_unlock(mu) == 0); } |
| 48 | |
| 49 | int gpr_mu_trylock(gpr_mu *mu) { |
| 50 | int err = pthread_mutex_trylock(mu); |
| 51 | GPR_ASSERT(err == 0 || err == EBUSY); |
| 52 | return err == 0; |
| 53 | } |
| 54 | |
| 55 | /*----------------------------------------*/ |
| 56 | |
| 57 | void gpr_cv_init(gpr_cv *cv) { GPR_ASSERT(pthread_cond_init(cv, NULL) == 0); } |
| 58 | |
| 59 | void gpr_cv_destroy(gpr_cv *cv) { GPR_ASSERT(pthread_cond_destroy(cv) == 0); } |
| 60 | |
| 61 | int gpr_cv_wait(gpr_cv *cv, gpr_mu *mu, gpr_timespec abs_deadline) { |
| 62 | int err = 0; |
| 63 | if (gpr_time_cmp(abs_deadline, gpr_inf_future) == 0) { |
| 64 | err = pthread_cond_wait(cv, mu); |
| 65 | } else { |
| 66 | err = pthread_cond_timedwait(cv, mu, &abs_deadline); |
| 67 | } |
| 68 | GPR_ASSERT(err == 0 || err == ETIMEDOUT || err == EAGAIN); |
| 69 | return err == ETIMEDOUT; |
| 70 | } |
| 71 | |
| 72 | void gpr_cv_signal(gpr_cv *cv) { GPR_ASSERT(pthread_cond_signal(cv) == 0); } |
| 73 | |
| 74 | void gpr_cv_broadcast(gpr_cv *cv) { |
| 75 | GPR_ASSERT(pthread_cond_broadcast(cv) == 0); |
| 76 | } |
| 77 | |
| 78 | /*----------------------------------------*/ |
| 79 | |
| 80 | void gpr_once_init(gpr_once *once, void (*init_function)(void)) { |
| 81 | GPR_ASSERT(pthread_once(once, init_function) == 0); |
| 82 | } |