Mercurial > hg > nginx-quic
view src/os/unix/ngx_pthread_thread.c @ 379:73688d5d7fc3
nginx-0.0.7-2004-07-06-20:12:16 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Tue, 06 Jul 2004 16:12:16 +0000 |
parents | d0451e402e27 |
children | b670db10cbbd |
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/* * Copyright (C) 2002-2004 Igor Sysoev, http://sysoev.ru/en/ */ #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; int ngx_create_thread(ngx_tid_t *tid, void* (*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 %d 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: " 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, uint flags) { int err; ngx_mutex_t *m; if (!(m = ngx_alloc(sizeof(ngx_mutex_t), log))) { 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(" PTR_FMT ") failed", m); } ngx_free(m); } ngx_int_t ngx_mutex_lock(ngx_mutex_t *m) { int err; if (!ngx_threaded) { return NGX_OK; } ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "lock mutex " PTR_FMT, m); err = pthread_mutex_lock(&m->mutex); if (err != 0) { ngx_log_error(NGX_LOG_ALERT, m->log, err, "pthread_mutex_lock(" PTR_FMT ") failed", m); return NGX_ERROR; } ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "mutex " PTR_FMT " is locked", m); return NGX_OK; } 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 " PTR_FMT, m); err = pthread_mutex_trylock(&m->mutex); if (err != 0) { ngx_log_error(NGX_LOG_ALERT, m->log, err, "pthread_mutex_trylock(" PTR_FMT ") failed", m); return NGX_ERROR; } ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "mutex " PTR_FMT " is locked", m); return NGX_OK; } ngx_int_t ngx_mutex_unlock(ngx_mutex_t *m) { int err; if (!ngx_threaded) { return NGX_OK; } ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "unlock mutex " PTR_FMT, m); err = pthread_mutex_unlock(&m->mutex); if (err != 0) { ngx_log_error(NGX_LOG_ALERT, m->log, err, "pthread_mutex_unlock(" PTR_FMT ") failed", m); return NGX_ERROR; } ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "mutex " PTR_FMT " is unlocked", m); return NGX_OK; } ngx_cond_t *ngx_cond_init(ngx_log_t *log) { int err; ngx_cond_t *cv; if (!(cv = ngx_alloc(sizeof(ngx_cond_t), log))) { 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(" PTR_FMT ") 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 " PTR_FMT " 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(" PTR_FMT ") failed", cv); return NGX_ERROR; } ngx_log_debug1(NGX_LOG_DEBUG_CORE, cv->log, 0, "cv " PTR_FMT " is waked up", cv); ngx_log_debug1(NGX_LOG_DEBUG_MUTEX, m->log, 0, "mutex " PTR_FMT " 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 " PTR_FMT " to signal", cv); err = pthread_cond_signal(&cv->cond); if (err != 0) { ngx_log_error(NGX_LOG_ALERT, cv->log, err, "pthread_cond_signal(" PTR_FMT ") failed", cv); return NGX_ERROR; } ngx_log_debug1(NGX_LOG_DEBUG_CORE, cv->log, 0, "cv " PTR_FMT " is signaled", cv); return NGX_OK; }