Mercurial > hg > nginx-quic
view src/event/modules/ngx_aio_module.c @ 182:3c49eaf3f522
nginx-0.0.1-2003-11-13-09:14:05 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Thu, 13 Nov 2003 06:14:05 +0000 |
parents | 84036764e215 |
children | 70e1c7d2b83d |
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#include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #include <ngx_aio.h> #if (HAVE_KQUEUE) #include <ngx_kqueue_module.h> #endif static int ngx_aio_init(ngx_cycle_t *cycle); static void ngx_aio_done(ngx_cycle_t *cycle); static int ngx_aio_add_event(ngx_event_t *ev, int event, u_int flags); static int ngx_aio_del_event(ngx_event_t *ev, int event, u_int flags); static int ngx_aio_del_connection(ngx_connection_t *c); static int ngx_aio_process_events(ngx_log_t *log); ngx_os_io_t ngx_os_aio = { ngx_aio_read, ngx_aio_read_chain, ngx_aio_write, ngx_aio_write_chain, NGX_HAVE_ZEROCOPY }; static ngx_str_t aio_name = ngx_string("aio"); ngx_event_module_t ngx_aio_module_ctx = { &aio_name, NULL, /* create configuration */ NULL, /* init configuration */ { ngx_aio_add_event, /* add an event */ ngx_aio_del_event, /* delete an event */ NULL, /* enable an event */ NULL, /* disable an event */ NULL, /* add an connection */ ngx_aio_del_connection, /* delete an connection */ ngx_aio_process_events, /* process the events */ ngx_aio_init, /* init the events */ ngx_aio_done /* done the events */ } }; ngx_module_t ngx_aio_module = { NGX_MODULE, &ngx_aio_module_ctx, /* module context */ NULL, /* module directives */ NGX_EVENT_MODULE, /* module type */ NULL, /* init module */ NULL /* init child */ }; #if (HAVE_KQUEUE) static int ngx_aio_init(ngx_cycle_t *cycle) { if (ngx_kqueue_module_ctx.actions.init(cycle) == NGX_ERROR) { return NGX_ERROR; } ngx_io = ngx_os_aio; ngx_event_flags = NGX_USE_AIO_EVENT; ngx_event_actions = ngx_aio_module_ctx.actions; return NGX_OK; } static void ngx_aio_done(ngx_cycle_t *cycle) { ngx_kqueue_module_ctx.actions.done(cycle); } /* The event adding and deleting are needed for the listening sockets */ static int ngx_aio_add_event(ngx_event_t *ev, int event, u_int flags) { return ngx_kqueue_module_ctx.actions.add(ev, event, flags); } static int ngx_aio_del_event(ngx_event_t *ev, int event, u_int flags) { return ngx_kqueue_module_ctx.actions.del(ev, event, flags); } static int ngx_aio_del_connection(ngx_connection_t *c) { int rc; if (c->read->active == 0 && c->write->active == 0) { return NGX_OK; } rc = aio_cancel(c->fd, NULL); ngx_log_debug(c->log, "aio_cancel: %d" _ rc); if (rc == AIO_CANCELED) { c->read->active = c->write->active = 0; return NGX_OK; } if (rc == AIO_ALLDONE) { c->read->active = c->write->active = 0; ngx_log_error(NGX_LOG_ALERT, c->log, 0, "aio_cancel() returned AIO_ALLDONE"); return NGX_OK; } if (rc == -1) { ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno, "aio_cancel() failed"); return NGX_ERROR; } if (rc == AIO_NOTCANCELED) { ngx_log_error(NGX_LOG_ALERT, c->log, 0, "aio_cancel() returned AIO_NOTCANCELED"); return NGX_ERROR; } return NGX_OK; } static int ngx_aio_process_events(ngx_log_t *log) { return ngx_kqueue_module_ctx.actions.process(log); } #endif /* HAVE_KQUEUE */ #if 0 /* 1 */ int ngx_posix_aio_process_events(ngx_log_t *log) { listen via SIGIO; aio_* via SIGxxx; sigsuspend()/sigwaitinfo()/sigtimedwait(); } /* 2 */ int ngx_posix_aio_process_events(ngx_log_t *log) { unmask signal listen via SIGIO; /* BUG: SIGIO can be delivered before aio_*() */ aio_suspend()/aiowait()/aio_waitcomplete() with timeout mask signal if (ngx_socket_errno == NGX_EINTR) look listen select()/accept() nb listen sockets else aio } /* 3 */ int ngx_posix_aio_process_events(ngx_log_t *log) { #if 0 unmask signal /* BUG: AIO signal can be delivered before select() */ select(listen); mask signal #endif pselect(listen, mask); if (ngx_socket_errno == NGX_EINTR) look ready array } void aio_sig_handler(int signo, siginfo_t *siginfo, void *context) { push siginfo->si_value.sival_ptr } #endif