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Update output queue to not pin the CPU (proper waiting)

This commit is contained in:
Barra Ó Catháin 2023-11-20 21:26:21 +00:00 committed by Barry Kane
parent 751a734016
commit 4d13547ae6
2 changed files with 27 additions and 17 deletions
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8
source/server/output-queue.c
View File

@ -17,6 +17,11 @@ void * outputThreadHandler(void * outputQueue)
while (true) while (true)
{ {
if (queue->count == 0)
{
pthread_cond_wait(&queue->updated, &queue->waitMutex);
}
currentMessage = popOutputMessage(queue); currentMessage = popOutputMessage(queue);
if (currentMessage != NULL) if (currentMessage != NULL)
{ {
@ -46,6 +51,7 @@ struct OutputQueue * const createOutputQueue()
// Initialize it: // Initialize it:
pthread_mutex_init(&newQueue->mutex, NULL); pthread_mutex_init(&newQueue->mutex, NULL);
pthread_cond_init(&newQueue->updated, NULL);
newQueue->count = 0; newQueue->count = 0;
newQueue->front = NULL; newQueue->front = NULL;
newQueue->back = NULL; newQueue->back = NULL;
@ -101,6 +107,8 @@ size_t pushOutputMessage(struct OutputQueue * const queue,
// Leaving critical section - Unlock the queue: // Leaving critical section - Unlock the queue:
pthread_mutex_unlock(&queue->mutex); pthread_mutex_unlock(&queue->mutex);
pthread_cond_signal(&queue->updated);
return queue->count; return queue->count;
} }

2
source/server/output-queue.h
View File

@ -24,6 +24,8 @@ struct OutputMessage
struct OutputQueue struct OutputQueue
{ {
pthread_mutex_t mutex; pthread_mutex_t mutex;
pthread_mutex_t waitMutex;
pthread_cond_t updated;
size_t count; size_t count;
struct OutputMessage * front, * back; struct OutputMessage * front, * back;
}; };