Mercurial > hg > nginx-quic
view src/os/unix/ngx_pthread_thread.c @ 5905:2f7e557eab5b
Cache: proxy_cache_lock_age and friends.
Once this age is reached, the cache lock is discarded and another
request can acquire the lock. Requests which failed to acquire
the lock are not allowed to cache the response.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Tue, 18 Nov 2014 20:41:12 +0300 |
parents | d620f497c50f |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #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; }