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src/os/unix/ngx_pthread_thread.c - nginx-1.7.10
Global variables defined
Functions defined
Source code
- #include <ngx_config.h>
- #include <ngx_core.h>
- static ngx_uint_t nthreads;
- static ngx_uint_t max_threads;
- static pthread_attr_t thr_attr;
- ngx_err_t
- ngx_create_thread(ngx_tid_t *tid, ngx_thread_value_t (*func)(void *arg),
- void *arg, ngx_log_t *log)
- {
- int err;
- if (nthreads >= max_threads) {
- ngx_log_error(NGX_LOG_CRIT, log, 0,
- "no more than %ui threads can be created", max_threads);
- return NGX_ERROR;
- }
- err = pthread_create(tid, &thr_attr, func, arg);
- if (err != 0) {
- ngx_log_error(NGX_LOG_ALERT, log, err, "pthread_create() failed");
- return err;
- }
- ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0,
- "thread is created: " NGX_TID_T_FMT, *tid);
- nthreads++;
- return err;
- }
- ngx_int_t
- ngx_init_threads(int n, size_t size, ngx_cycle_t *cycle)
- {
- int err;
- max_threads = n;
- err = pthread_attr_init(&thr_attr);
- if (err != 0) {
- ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
- "pthread_attr_init() failed");
- return NGX_ERROR;
- }
- err = pthread_attr_setstacksize(&thr_attr, size);
- if (err != 0) {
- ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
- "pthread_attr_setstacksize() failed");
- return NGX_ERROR;
- }
- ngx_threaded = 1;
- return NGX_OK;
- }
- ngx_mutex_t *
- ngx_mutex_init(ngx_log_t *log, ngx_uint_t flags)
- {
- int err;
- ngx_mutex_t *m;
- m = ngx_alloc(sizeof(ngx_mutex_t), log);
- if (m == NULL) {
- return NULL;
- }
- m->log = log;
- err = pthread_mutex_init(&m->mutex, NULL);
- if (err != 0) {
- ngx_log_error(NGX_LOG_ALERT, m->log, err,
- "pthread_mutex_init() failed");
- return NULL;
- }
- return m;
- }
- void
- ngx_mutex_destroy(ngx_mutex_t *m)
- {
- int err;
- err = pthread_mutex_destroy(&m->mutex);
- if (err != 0) {
- ngx_log_error(NGX_LOG_ALERT, m->log, err,
- "pthread_mutex_destroy(%p) failed", m);
- }
- ngx_free(m);
- }
- void
- ngx_mutex_lock(ngx_mutex_t *m)
- {
- int err;
- if (!ngx_threaded) {
- return;
- }
- ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "lock mutex %p", m);
- err = pthread_mutex_lock(&m->mutex);
- if (err != 0) {
- ngx_log_error(NGX_LOG_ALERT, m->log, err,
- "pthread_mutex_lock(%p) failed", m);
- ngx_abort();
- }
- ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "mutex %p is locked", m);
- return;
- }
- ngx_int_t
- ngx_mutex_trylock(ngx_mutex_t *m)
- {
- int err;
- if (!ngx_threaded) {
- return NGX_OK;
- }
- ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "try lock mutex %p", m);
- err = pthread_mutex_trylock(&m->mutex);
- if (err == NGX_EBUSY) {
- return NGX_AGAIN;
- }
- if (err != 0) {
- ngx_log_error(NGX_LOG_ALERT, m->log, err,
- "pthread_mutex_trylock(%p) failed", m);
- ngx_abort();
- }
- ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "mutex %p is locked", m);
- return NGX_OK;
- }
- void
- ngx_mutex_unlock(ngx_mutex_t *m)
- {
- int err;
- if (!ngx_threaded) {
- return;
- }
- ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "unlock mutex %p", m);
- err = pthread_mutex_unlock(&m->mutex);
- if (err != 0) {
- ngx_log_error(NGX_LOG_ALERT, m->log, err,
- "pthread_mutex_unlock(%p) failed", m);
- ngx_abort();
- }
- ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "mutex %p is unlocked", m);
- return;
- }
- ngx_cond_t *
- ngx_cond_init(ngx_log_t *log)
- {
- int err;
- ngx_cond_t *cv;
- cv = ngx_alloc(sizeof(ngx_cond_t), log);
- if (cv == NULL) {
- return NULL;
- }
- cv->log = log;
- err = pthread_cond_init(&cv->cond, NULL);
- if (err != 0) {
- ngx_log_error(NGX_LOG_ALERT, cv->log, err,
- "pthread_cond_init() failed");
- return NULL;
- }
- return cv;
- }
- void
- ngx_cond_destroy(ngx_cond_t *cv)
- {
- int err;
- err = pthread_cond_destroy(&cv->cond);
- if (err != 0) {
- ngx_log_error(NGX_LOG_ALERT, cv->log, err,
- "pthread_cond_destroy(%p) failed", cv);
- }
- ngx_free(cv);
- }
- ngx_int_t
- ngx_cond_wait(ngx_cond_t *cv, ngx_mutex_t *m)
- {
- int err;
- ngx_log_debug1(NGX_LOG_DEBUG_CORE, cv->log, 0, "cv %p wait", cv);
- err = pthread_cond_wait(&cv->cond, &m->mutex);
- if (err != 0) {
- ngx_log_error(NGX_LOG_ALERT, cv->log, err,
- "pthread_cond_wait(%p) failed", cv);
- return NGX_ERROR;
- }
- ngx_log_debug1(NGX_LOG_DEBUG_CORE, cv->log, 0, "cv %p is waked up", cv);
- ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "mutex %p is locked", m);
- return NGX_OK;
- }
- ngx_int_t
- ngx_cond_signal(ngx_cond_t *cv)
- {
- int err;
- ngx_log_debug1(NGX_LOG_DEBUG_CORE, cv->log, 0, "cv %p to signal", cv);
- err = pthread_cond_signal(&cv->cond);
- if (err != 0) {
- ngx_log_error(NGX_LOG_ALERT, cv->log, err,
- "pthread_cond_signal(%p) failed", cv);
- return NGX_ERROR;
- }
- ngx_log_debug1(NGX_LOG_DEBUG_CORE, cv->log, 0, "cv %p is signaled", cv);
- return NGX_OK;
- }
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