109 lines
2.7 KiB
C
109 lines
2.7 KiB
C
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/*
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* Copyright (C) 2022 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "hks_condition.h"
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#include "hks_mem.h"
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#include "hks_template.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct HksCondition {
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bool notified;
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bool waited;
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pthread_mutex_t mutex;
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pthread_cond_t cond;
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};
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int32_t HksConditionWait(HksCondition *condition)
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{
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HKS_IF_NULL_RETURN(condition, -1)
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int32_t ret = pthread_mutex_lock(&condition->mutex);
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if (ret != 0) {
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return ret;
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}
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if (condition->notified) {
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condition->notified = false;
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pthread_mutex_unlock(&condition->mutex);
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return 0;
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} else {
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condition->waited = true;
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ret = pthread_cond_wait(&condition->cond, &condition->mutex);
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condition->waited = false;
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condition->notified = false;
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pthread_mutex_unlock(&condition->mutex);
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return ret;
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}
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}
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int32_t HksConditionNotify(HksCondition *condition)
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{
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HKS_IF_NULL_RETURN(condition, -1)
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int32_t ret = pthread_mutex_lock(&condition->mutex);
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if (ret != 0) {
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return ret;
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}
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if (!condition->waited) {
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condition->notified = true;
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} else {
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condition->notified = false;
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}
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ret = pthread_cond_signal(&condition->cond);
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pthread_mutex_unlock(&condition->mutex);
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return ret;
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}
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HksCondition *HksConditionCreate(void)
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{
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HksCondition *condition = (HksCondition *)HksMalloc(sizeof(HksCondition));
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HKS_IF_NULL_RETURN(condition, NULL)
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condition->notified = false;
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condition->waited = false;
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int32_t ret = pthread_mutex_init(&condition->mutex, NULL);
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if (ret != 0) {
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HksFree(condition);
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return NULL;
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}
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pthread_condattr_t attr;
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pthread_condattr_init(&attr);
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ret = pthread_cond_init(&condition->cond, &attr);
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pthread_condattr_destroy(&attr);
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if (ret != 0) {
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pthread_mutex_destroy(&condition->mutex);
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HksFree(condition);
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return NULL;
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}
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return condition;
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}
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void HksConditionDestroy(HksCondition* condition)
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{
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if (condition == NULL) {
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return;
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}
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pthread_mutex_destroy(&condition->mutex);
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pthread_cond_destroy(&condition->cond);
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HksFree(condition);
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}
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#ifdef __cplusplus
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}
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#endif
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