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| | #include "mpmcqueue.h"
void mpmcq_init(struct mpmcq *queue)
{
queue->head = NULL;
queue->cancel = 0;
pthread_mutex_init(&queue->mutex, NULL);
pthread_cond_init(&queue->condition, NULL);
}
void mpmcq_destroy(struct mpmcq *queue)
{
pthread_mutex_destroy(&queue->mutex);
pthread_cond_destroy(&queue->condition);
}
void mpmcq_push(struct mpmcq *queue, struct mpmcq_entry *entry)
{
pthread_mutex_lock(&queue->mutex);
entry->next = queue->head;
queue->head = entry;
pthread_cond_signal(&queue->condition);
pthread_mutex_unlock(&queue->mutex);
}
struct mpmcq_entry *mpmcq_pop(struct mpmcq *queue)
{
struct mpmcq_entry *entry = NULL;
pthread_mutex_lock(&queue->mutex);
while (!queue->head && !queue->cancel)
pthread_cond_wait(&queue->condition, &queue->mutex);
if (!queue->cancel) {
entry = queue->head;
queue->head = entry->next;
}
pthread_mutex_unlock(&queue->mutex);
return entry;
}
void mpmcq_cancel(struct mpmcq *queue)
{
struct mpmcq_entry *entry;
pthread_mutex_lock(&queue->mutex);
queue->cancel = 1;
pthread_cond_broadcast(&queue->condition);
pthread_mutex_unlock(&queue->mutex);
}
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