Beispiel #1
0
static char *
ngx_event_core_init_conf(ngx_cycle_t *cycle, void *conf)
{
    ngx_event_conf_t  *ecf = conf;

#if (NGX_HAVE_EPOLL) && !(NGX_TEST_BUILD_EPOLL)
    int                  fd;
#endif
#if (NGX_HAVE_RTSIG)
    ngx_uint_t           rtsig;
    ngx_core_conf_t     *ccf;
#endif
    ngx_int_t            i;
    ngx_module_t        *module;
    ngx_event_module_t  *event_module;

    module = NULL;

#if (NGX_HAVE_EPOLL) && !(NGX_TEST_BUILD_EPOLL)

    fd = epoll_create(100);

    if (fd != -1) {
        (void) close(fd);
        module = &ngx_epoll_module;

    } else if (ngx_errno != NGX_ENOSYS) {
        module = &ngx_epoll_module;
    }

#endif

#if (NGX_HAVE_RTSIG)

    if (module == NULL) {
        module = &ngx_rtsig_module;
        rtsig = 1;

    } else {
        rtsig = 0;
    }

#endif

#if (NGX_HAVE_DEVPOLL)

    module = &ngx_devpoll_module;

#endif

#if (NGX_HAVE_KQUEUE)

    module = &ngx_kqueue_module;

#endif

#if (NGX_HAVE_SELECT)

    if (module == NULL) {
        module = &ngx_select_module;
    }

#endif

    if (module == NULL) {
        for (i = 0; ngx_modules[i]; i++) {

            if (ngx_modules[i]->type != NGX_EVENT_MODULE) {
                continue;
            }

            event_module = ngx_modules[i]->ctx;

            if (ngx_strcmp(event_module->name->data, event_core_name.data) == 0)
            {
                continue;
            }

            module = ngx_modules[i];
            break;
        }
    }

    if (module == NULL) {
        ngx_log_error(NGX_LOG_EMERG, cycle->log, 0, "no events module found");
        return NGX_CONF_ERROR;
    }

    ngx_conf_init_uint_value(ecf->connections, DEFAULT_CONNECTIONS);
    cycle->connection_n = ecf->connections;

    ngx_conf_init_uint_value(ecf->use, module->ctx_index);

    event_module = module->ctx;
    ngx_conf_init_ptr_value(ecf->name, event_module->name->data);

    ngx_conf_init_value(ecf->multi_accept, 0);
    ngx_conf_init_value(ecf->accept_mutex, 1);
    ngx_conf_init_msec_value(ecf->accept_mutex_delay, 500);


#if (NGX_HAVE_RTSIG)

    if (!rtsig) {
        return NGX_CONF_OK;
    }

    if (ecf->accept_mutex) {
        return NGX_CONF_OK;
    }

    ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);

    if (ccf->worker_processes == 0) {
        return NGX_CONF_OK;
    }

    ngx_log_error(NGX_LOG_EMERG, cycle->log, 0,
                  "the \"rtsig\" method requires \"accept_mutex\" to be on");

    return NGX_CONF_ERROR;

#else

    return NGX_CONF_OK;

#endif
}
static char *ngx_event_init_conf(ngx_cycle_t *cycle, void *conf)
{
    ngx_event_conf_t  *ecf = conf;
#if (HAVE_RTSIG)
    ngx_core_conf_t  *ccf;
#endif

#if (HAVE_KQUEUE)

    ngx_conf_init_unsigned_value(ecf->connections, DEFAULT_CONNECTIONS);
    ngx_conf_init_unsigned_value(ecf->use, ngx_kqueue_module.ctx_index);
    ngx_conf_init_ptr_value(ecf->name, ngx_kqueue_module_ctx.name->data);

#elif (HAVE_DEVPOLL)

    ngx_conf_init_unsigned_value(ecf->connections, DEFAULT_CONNECTIONS);
    ngx_conf_init_unsigned_value(ecf->use, ngx_devpoll_module.ctx_index);
    ngx_conf_init_ptr_value(ecf->name, ngx_devpoll_module_ctx.name->data);

#elif (HAVE_EPOLL)

    ngx_conf_init_unsigned_value(ecf->connections, DEFAULT_CONNECTIONS);
    ngx_conf_init_unsigned_value(ecf->use, ngx_epoll_module.ctx_index);
    ngx_conf_init_ptr_value(ecf->name, ngx_epoll_module_ctx.name->data);

#elif (HAVE_RTSIG)

    ngx_conf_init_unsigned_value(ecf->connections, DEFAULT_CONNECTIONS);
    ngx_conf_init_unsigned_value(ecf->use, ngx_rtsig_module.ctx_index);
    ngx_conf_init_ptr_value(ecf->name, ngx_rtsig_module_ctx.name->data);

#elif (HAVE_SELECT)

#if (WIN32)
    ngx_conf_init_unsigned_value(ecf->connections, DEFAULT_CONNECTIONS);
#else
    ngx_conf_init_unsigned_value(ecf->connections,
                                 FD_SETSIZE < DEFAULT_CONNECTIONS ? FD_SETSIZE : DEFAULT_CONNECTIONS);
#endif

    ngx_conf_init_unsigned_value(ecf->use, ngx_select_module.ctx_index);
    ngx_conf_init_ptr_value(ecf->name, ngx_select_module_ctx.name->data);

#else

    ngx_int_t            i, m;
    ngx_event_module_t  *module;

    m = -1;
    module = NULL;

    for (i = 0; ngx_modules[i]; i++) {
        if (ngx_modules[i]->type == NGX_EVENT_MODULE) {
            module = ngx_modules[i]->ctx;

            if (ngx_strcmp(module->name->data, event_core_name.data) == 0) {
                continue;
            }

            m = ngx_modules[i]->ctx_index;
            break;
        }
    }

    if (m == -1) {
        ngx_log_error(NGX_LOG_EMERG, cycle->log, 0, "no events module found");
        return NGX_CONF_ERROR;
    }

    ngx_conf_init_unsigned_value(ecf->connections, DEFAULT_CONNECTIONS);

    ngx_conf_init_unsigned_value(ecf->use, m);
    ngx_conf_init_ptr_value(ecf->name, module->name->data);

#endif

    cycle->connection_n = ecf->connections;

    ngx_conf_init_value(ecf->multi_accept, 0);
    ngx_conf_init_value(ecf->accept_mutex, 1);
    ngx_conf_init_msec_value(ecf->accept_mutex_delay, 500);

#if (HAVE_RTSIG)
    if (ecf->use == ngx_rtsig_module.ctx_index && ecf->accept_mutex == 0) {
        ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx,
                                               ngx_core_module);
        if (ccf->worker_processes) {
            ngx_log_error(NGX_LOG_EMERG, cycle->log, 0,
                          "the \"rtsig\" method requires "
                          "\"accept_mutex\" to be on");
            return NGX_CONF_ERROR;
        }
    }
#endif

    return NGX_CONF_OK;
}
Beispiel #3
0
// 所有模块配置解析完毕后,对配置进行初始化
// 如果有的指令没有写,就要给正确的默认值
// 模块默认使用epoll
// 默认不接受多个请求,也就是一次只accept一个连接
// 默认使用负载均衡锁
static char *
ngx_event_core_init_conf(ngx_cycle_t *cycle, void *conf)
{
    ngx_event_conf_t  *ecf = conf;

#if (NGX_HAVE_EPOLL) && !(NGX_TEST_BUILD_EPOLL)
    int                  fd;
#endif

    // rtsig在nginx 1.9.x已经删除

    ngx_int_t            i;
    ngx_module_t        *module;
    ngx_event_module_t  *event_module;

    module = NULL;

// 测试epoll是否可用
#if (NGX_HAVE_EPOLL) && !(NGX_TEST_BUILD_EPOLL)

    fd = epoll_create(100);

    // epoll调用可用,那么模块默认使用epoll
    if (fd != -1) {
        (void) close(fd);
        // epoll调用可用,那么模块默认使用epoll
        module = &ngx_epoll_module;

    } else if (ngx_errno != NGX_ENOSYS) {
        // epoll调用可用,那么模块默认使用epoll
        module = &ngx_epoll_module;
    }

#endif

    // rtsig在nginx 1.9.x已经删除

#if (NGX_HAVE_DEVPOLL) && !(NGX_TEST_BUILD_DEVPOLL)

    module = &ngx_devpoll_module;

#endif

#if (NGX_HAVE_KQUEUE)

    module = &ngx_kqueue_module;

#endif

    // 如果epoll不可用,那么默认使用select
#if (NGX_HAVE_SELECT)

    if (module == NULL) {
        module = &ngx_select_module;
    }

#endif

    // 还没有决定默认的事件模型
    if (module == NULL) {
        // 遍历所有的事件模块
        for (i = 0; cycle->modules[i]; i++) {

            if (cycle->modules[i]->type != NGX_EVENT_MODULE) {
                continue;
            }

            event_module = cycle->modules[i]->ctx;

            // 跳过event_core模块
            if (ngx_strcmp(event_module->name->data, event_core_name.data) == 0)
            {
                continue;
            }

            // 使用数组里的第一个事件模块
            module = cycle->modules[i];
            break;
        }
    }

    // 最后还没有决定默认的事件模型,出错
    if (module == NULL) {
        ngx_log_error(NGX_LOG_EMERG, cycle->log, 0, "no events module found");
        return NGX_CONF_ERROR;
    }

    // nginx每个进程可使用的连接数量,即cycle里的连接池大小
    ngx_conf_init_uint_value(ecf->connections, DEFAULT_CONNECTIONS);

    // 如果没有使用worker_connections指令,在这里设置
    cycle->connection_n = ecf->connections;

    // 决定使用的事件模型,之前的module只作为默认值,如果已经使用了use则无效
    ngx_conf_init_uint_value(ecf->use, module->ctx_index);

    // 初始化使用的事件模块的名字
    event_module = module->ctx;
    ngx_conf_init_ptr_value(ecf->name, event_module->name->data);

    // 默认不接受多个请求,也就是一次只accept一个连接
    ngx_conf_init_value(ecf->multi_accept, 0);

    // 默认使用负载均衡锁
    ngx_conf_init_value(ecf->accept_mutex, 1);

    // 默认负载均衡锁的等待时间是500毫秒
    ngx_conf_init_msec_value(ecf->accept_mutex_delay, 500);

    return NGX_CONF_OK;
}
static char *
ngx_event_core_init_conf(ngx_cycle_t *cycle, void *conf)
{
    ngx_event_conf_t  *ecf = conf;

#if (NGX_HAVE_EPOLL) && !(NGX_TEST_BUILD_EPOLL)
    int                  fd;
#endif
    ngx_int_t            i;
    ngx_module_t        *module;
    ngx_event_module_t  *event_module;

    module = NULL;

#if (NGX_HAVE_EPOLL) && !(NGX_TEST_BUILD_EPOLL)

    fd = epoll_create(100);

    if (fd != -1) {
        (void) close(fd);
        module = &ngx_epoll_module;

    } else if (ngx_errno != NGX_ENOSYS) {
        module = &ngx_epoll_module;
    }

#endif

#if (NGX_HAVE_DEVPOLL)

    module = &ngx_devpoll_module;

#endif

#if (NGX_HAVE_KQUEUE)

    module = &ngx_kqueue_module;

#endif

#if (NGX_HAVE_SELECT)

    if (module == NULL) {
        module = &ngx_select_module;
    }

#endif

    //ngx_event_core_module后的第一个NGX_EVENT_MODULE也就是ngx_epoll_module默认作为第一个event模块
    if (module == NULL) {
        for (i = 0; ngx_modules[i]; i++) {

            if (ngx_modules[i]->type != NGX_EVENT_MODULE) {
                continue;
            }

            event_module = ngx_modules[i]->ctx;

            if (ngx_strcmp(event_module->name->data, event_core_name.data) == 0) //不能为ngx_event_core_module
            {
                continue;
            }

            module = ngx_modules[i];
            break;
        }
    }

    if (module == NULL) {
        ngx_log_error(NGX_LOG_EMERG, cycle->log, 0, "no events module found");
        return NGX_CONF_ERROR;
    }

    ngx_conf_init_uint_value(ecf->connections, DEFAULT_CONNECTIONS);
    cycle->connection_n = ecf->connections;

    ngx_conf_init_uint_value(ecf->use, module->ctx_index);

    event_module = module->ctx;
    ngx_conf_init_ptr_value(ecf->name, event_module->name->data);

    ngx_conf_init_value(ecf->multi_accept, 0);
    ngx_conf_init_value(ecf->accept_mutex, 1);
    ngx_conf_init_msec_value(ecf->accept_mutex_delay, 500);

    return NGX_CONF_OK;
}