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Thread pools: keep waiting tasks mutex in ngx_thread_pool_t.

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It's not needed for completed tasks queue since the previous change.

No functional changes.
This commit is contained in:
Valentin Bartenev 2015-03-23 17:51:21 +03:00
parent f109a68b4f
commit cb43696e0c
1 changed files with 20 additions and 45 deletions
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65
src/core/ngx_thread_pool.c
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@ -17,13 +17,17 @@ typedef struct {
typedef struct {
ngx_thread_mutex_t mtx;
ngx_thread_task_t *first;
ngx_thread_task_t **last;
} ngx_thread_pool_queue_t;
#define ngx_thread_pool_queue_init(q) \
(q)->first = NULL; \
(q)->last = &(q)->first
struct ngx_thread_pool_s {
ngx_thread_mutex_t mtx;
ngx_thread_pool_queue_t queue;
ngx_int_t waiting;
ngx_thread_cond_t cond;
@ -42,10 +46,6 @@ struct ngx_thread_pool_s {
static ngx_int_t ngx_thread_pool_init(ngx_thread_pool_t *tp, ngx_log_t *log,
ngx_pool_t *pool);
static ngx_int_t ngx_thread_pool_queue_init(ngx_thread_pool_queue_t *queue,
ngx_log_t *log);
static ngx_int_t ngx_thread_pool_queue_destroy(ngx_thread_pool_queue_t *queue,
ngx_log_t *log);
static void ngx_thread_pool_destroy(ngx_thread_pool_t *tp);
static void *ngx_thread_pool_cycle(void *data);
@ -117,12 +117,14 @@ ngx_thread_pool_init(ngx_thread_pool_t *tp, ngx_log_t *log, ngx_pool_t *pool)
return NGX_ERROR;
}
if (ngx_thread_pool_queue_init(&tp->queue, log) != NGX_OK) {
ngx_thread_pool_queue_init(&tp->queue);
if (ngx_thread_mutex_create(&tp->mtx, log) != NGX_OK) {
return NGX_ERROR;
}
if (ngx_thread_cond_create(&tp->cond, log) != NGX_OK) {
(void) ngx_thread_pool_queue_destroy(&tp->queue, log);
(void) ngx_thread_mutex_destroy(&tp->mtx, log);
return NGX_ERROR;
}
@ -160,27 +162,6 @@ ngx_thread_pool_init(ngx_thread_pool_t *tp, ngx_log_t *log, ngx_pool_t *pool)
}
static ngx_int_t
ngx_thread_pool_queue_init(ngx_thread_pool_queue_t *queue, ngx_log_t *log)
{
queue->first = NULL;
queue->last = &queue->first;
return ngx_thread_mutex_create(&queue->mtx, log);
}
static ngx_int_t
ngx_thread_pool_queue_destroy(ngx_thread_pool_queue_t *queue, ngx_log_t *log)
{
#if 0
return ngx_thread_mutex_destroy(&queue->mtx, log);
#else
return NGX_OK;
#endif
}
static void
ngx_thread_pool_destroy(ngx_thread_pool_t *tp)
{
@ -188,9 +169,9 @@ ngx_thread_pool_destroy(ngx_thread_pool_t *tp)
#if 0
(void) ngx_thread_cond_destroy(&tp->cond, tp->log);
#endif
(void) ngx_thread_pool_queue_destroy(&tp->queue, tp->log);
(void) ngx_thread_mutex_destroy(&tp->mtx, tp->log);
#endif
}
@ -219,12 +200,12 @@ ngx_thread_task_post(ngx_thread_pool_t *tp, ngx_thread_task_t *task)
return NGX_ERROR;
}
if (ngx_thread_mutex_lock(&tp->queue.mtx, tp->log) != NGX_OK) {
if (ngx_thread_mutex_lock(&tp->mtx, tp->log) != NGX_OK) {
return NGX_ERROR;
}
if (tp->waiting >= tp->max_queue) {
(void) ngx_thread_mutex_unlock(&tp->queue.mtx, tp->log);
(void) ngx_thread_mutex_unlock(&tp->mtx, tp->log);
ngx_log_error(NGX_LOG_ERR, tp->log, 0,
"thread pool \"%V\" queue overflow: %i tasks waiting",
@ -238,7 +219,7 @@ ngx_thread_task_post(ngx_thread_pool_t *tp, ngx_thread_task_t *task)
task->next = NULL;
if (ngx_thread_cond_signal(&tp->cond, tp->log) != NGX_OK) {
(void) ngx_thread_mutex_unlock(&tp->queue.mtx, tp->log);
(void) ngx_thread_mutex_unlock(&tp->mtx, tp->log);
return NGX_ERROR;
}
@ -247,7 +228,7 @@ ngx_thread_task_post(ngx_thread_pool_t *tp, ngx_thread_task_t *task)
tp->waiting++;
(void) ngx_thread_mutex_unlock(&tp->queue.mtx, tp->log);
(void) ngx_thread_mutex_unlock(&tp->mtx, tp->log);
ngx_log_debug2(NGX_LOG_DEBUG_CORE, tp->log, 0,
"task #%ui added to thread pool \"%V\"",
@ -287,7 +268,7 @@ ngx_thread_pool_cycle(void *data)
}
for ( ;; ) {
if (ngx_thread_mutex_lock(&tp->queue.mtx, tp->log) != NGX_OK) {
if (ngx_thread_mutex_lock(&tp->mtx, tp->log) != NGX_OK) {
return NULL;
}
@ -295,10 +276,10 @@ ngx_thread_pool_cycle(void *data)
tp->waiting--;
while (tp->queue.first == NULL) {
if (ngx_thread_cond_wait(&tp->cond, &tp->queue.mtx, tp->log)
if (ngx_thread_cond_wait(&tp->cond, &tp->mtx, tp->log)
!= NGX_OK)
{
(void) ngx_thread_mutex_unlock(&tp->queue.mtx, tp->log);
(void) ngx_thread_mutex_unlock(&tp->mtx, tp->log);
return NULL;
}
}
@ -310,7 +291,7 @@ ngx_thread_pool_cycle(void *data)
tp->queue.last = &tp->queue.first;
}
if (ngx_thread_mutex_unlock(&tp->queue.mtx, tp->log) != NGX_OK) {
if (ngx_thread_mutex_unlock(&tp->mtx, tp->log) != NGX_OK) {
return NULL;
}
@ -578,11 +559,7 @@ ngx_thread_pool_init_worker(ngx_cycle_t *cycle)
return NGX_OK;
}
if (ngx_thread_pool_queue_init(&ngx_thread_pool_done, cycle->log)
!= NGX_OK)
{
return NGX_ERROR;
}
ngx_thread_pool_queue_init(&ngx_thread_pool_done);
tpp = tcf->pools.elts;
@ -621,6 +598,4 @@ ngx_thread_pool_exit_worker(ngx_cycle_t *cycle)
for (i = 0; i < tcf->pools.nelts; i++) {
ngx_thread_pool_destroy(tpp[i]);
}
(void) ngx_thread_pool_queue_destroy(&ngx_thread_pool_done, cycle->log);
}