3 * Copyright (C) Igor Sysoev
7 #include <ngx_config.h>
11 static ngx_uint_t nthreads;
12 static ngx_uint_t max_threads;
15 static pthread_attr_t thr_attr;
19 ngx_create_thread(ngx_tid_t *tid, ngx_thread_value_t (*func)(void *arg),
20 void *arg, ngx_log_t *log)
24 if (nthreads >= max_threads) {
25 ngx_log_error(NGX_LOG_CRIT, log, 0,
26 "no more than %ui threads can be created", max_threads);
30 err = pthread_create(tid, &thr_attr, func, arg);
33 ngx_log_error(NGX_LOG_ALERT, log, err, "pthread_create() failed");
37 ngx_log_debug1(NGX_LOG_DEBUG_CORE, log, 0,
38 "thread is created: " NGX_TID_T_FMT, *tid);
47 ngx_init_threads(int n, size_t size, ngx_cycle_t *cycle)
53 err = pthread_attr_init(&thr_attr);
56 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
57 "pthread_attr_init() failed");
61 err = pthread_attr_setstacksize(&thr_attr, size);
64 ngx_log_error(NGX_LOG_ALERT, cycle->log, err,
65 "pthread_attr_setstacksize() failed");
76 ngx_mutex_init(ngx_log_t *log, ngx_uint_t flags)
81 m = ngx_alloc(sizeof(ngx_mutex_t), log);
88 err = pthread_mutex_init(&m->mutex, NULL);
91 ngx_log_error(NGX_LOG_ALERT, m->log, err,
92 "pthread_mutex_init() failed");
101 ngx_mutex_destroy(ngx_mutex_t *m)
105 err = pthread_mutex_destroy(&m->mutex);
108 ngx_log_error(NGX_LOG_ALERT, m->log, err,
109 "pthread_mutex_destroy(%p) failed", m);
117 ngx_mutex_lock(ngx_mutex_t *m)
125 ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "lock mutex %p", m);
127 err = pthread_mutex_lock(&m->mutex);
130 ngx_log_error(NGX_LOG_ALERT, m->log, err,
131 "pthread_mutex_lock(%p) failed", m);
135 ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "mutex %p is locked", m);
142 ngx_mutex_trylock(ngx_mutex_t *m)
150 ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "try lock mutex %p", m);
152 err = pthread_mutex_trylock(&m->mutex);
154 if (err == NGX_EBUSY) {
159 ngx_log_error(NGX_LOG_ALERT, m->log, err,
160 "pthread_mutex_trylock(%p) failed", m);
164 ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "mutex %p is locked", m);
171 ngx_mutex_unlock(ngx_mutex_t *m)
179 ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "unlock mutex %p", m);
181 err = pthread_mutex_unlock(&m->mutex);
184 ngx_log_error(NGX_LOG_ALERT, m->log, err,
185 "pthread_mutex_unlock(%p) failed", m);
189 ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "mutex %p is unlocked", m);
196 ngx_cond_init(ngx_log_t *log)
201 cv = ngx_alloc(sizeof(ngx_cond_t), log);
208 err = pthread_cond_init(&cv->cond, NULL);
211 ngx_log_error(NGX_LOG_ALERT, cv->log, err,
212 "pthread_cond_init() failed");
221 ngx_cond_destroy(ngx_cond_t *cv)
225 err = pthread_cond_destroy(&cv->cond);
228 ngx_log_error(NGX_LOG_ALERT, cv->log, err,
229 "pthread_cond_destroy(%p) failed", cv);
237 ngx_cond_wait(ngx_cond_t *cv, ngx_mutex_t *m)
241 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cv->log, 0, "cv %p wait", cv);
243 err = pthread_cond_wait(&cv->cond, &m->mutex);
246 ngx_log_error(NGX_LOG_ALERT, cv->log, err,
247 "pthread_cond_wait(%p) failed", cv);
251 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cv->log, 0, "cv %p is waked up", cv);
253 ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "mutex %p is locked", m);
260 ngx_cond_signal(ngx_cond_t *cv)
264 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cv->log, 0, "cv %p to signal", cv);
266 err = pthread_cond_signal(&cv->cond);
269 ngx_log_error(NGX_LOG_ALERT, cv->log, err,
270 "pthread_cond_signal(%p) failed", cv);
274 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cv->log, 0, "cv %p is signaled", cv);