diff options
Diffstat (limited to 'app/nginx/src/os/unix/ngx_file_aio_read.c')
| -rw-r--r-- | app/nginx/src/os/unix/ngx_file_aio_read.c | 216 |
1 files changed, 0 insertions, 216 deletions
diff --git a/app/nginx/src/os/unix/ngx_file_aio_read.c b/app/nginx/src/os/unix/ngx_file_aio_read.c deleted file mode 100644 index aedc3c9..0000000 --- a/app/nginx/src/os/unix/ngx_file_aio_read.c +++ /dev/null @@ -1,216 +0,0 @@ - -/* - * Copyright (C) Igor Sysoev - * Copyright (C) Nginx, Inc. - */ - - -#include <ngx_config.h> -#include <ngx_core.h> -#include <ngx_event.h> - - -/* - * FreeBSD file AIO features and quirks: - * - * if an asked data are already in VM cache, then aio_error() returns 0, - * and the data are already copied in buffer; - * - * aio_read() preread in VM cache as minimum 16K (probably BKVASIZE); - * the first AIO preload may be up to 128K; - * - * aio_read/aio_error() may return EINPROGRESS for just written data; - * - * kqueue EVFILT_AIO filter is level triggered only: an event repeats - * until aio_return() will be called; - * - * aio_cancel() cannot cancel file AIO: it returns AIO_NOTCANCELED always. - */ - - -extern int ngx_kqueue; - - -static ssize_t ngx_file_aio_result(ngx_file_t *file, ngx_event_aio_t *aio, - ngx_event_t *ev); -static void ngx_file_aio_event_handler(ngx_event_t *ev); - - -ngx_int_t -ngx_file_aio_init(ngx_file_t *file, ngx_pool_t *pool) -{ - ngx_event_aio_t *aio; - - aio = ngx_pcalloc(pool, sizeof(ngx_event_aio_t)); - if (aio == NULL) { - return NGX_ERROR; - } - - aio->file = file; - aio->fd = file->fd; - aio->event.data = aio; - aio->event.ready = 1; - aio->event.log = file->log; - - file->aio = aio; - - return NGX_OK; -} - - -ssize_t -ngx_file_aio_read(ngx_file_t *file, u_char *buf, size_t size, off_t offset, - ngx_pool_t *pool) -{ - int n; - ngx_event_t *ev; - ngx_event_aio_t *aio; - - if (!ngx_file_aio) { - return ngx_read_file(file, buf, size, offset); - } - - if (file->aio == NULL && ngx_file_aio_init(file, pool) != NGX_OK) { - return NGX_ERROR; - } - - aio = file->aio; - ev = &aio->event; - - if (!ev->ready) { - ngx_log_error(NGX_LOG_ALERT, file->log, 0, - "second aio post for \"%V\"", &file->name); - return NGX_AGAIN; - } - - ngx_log_debug4(NGX_LOG_DEBUG_CORE, file->log, 0, - "aio complete:%d @%O:%uz %V", - ev->complete, offset, size, &file->name); - - if (ev->complete) { - ev->complete = 0; - ngx_set_errno(aio->err); - - if (aio->err == 0) { - return aio->nbytes; - } - - ngx_log_error(NGX_LOG_CRIT, file->log, ngx_errno, - "aio read \"%s\" failed", file->name.data); - - return NGX_ERROR; - } - - ngx_memzero(&aio->aiocb, sizeof(struct aiocb)); - - aio->aiocb.aio_fildes = file->fd; - aio->aiocb.aio_offset = offset; - aio->aiocb.aio_buf = buf; - aio->aiocb.aio_nbytes = size; -#if (NGX_HAVE_KQUEUE) - aio->aiocb.aio_sigevent.sigev_notify_kqueue = ngx_kqueue; - aio->aiocb.aio_sigevent.sigev_notify = SIGEV_KEVENT; - aio->aiocb.aio_sigevent.sigev_value.sigval_ptr = ev; -#endif - ev->handler = ngx_file_aio_event_handler; - - n = aio_read(&aio->aiocb); - - if (n == -1) { - n = ngx_errno; - - if (n == NGX_EAGAIN) { - return ngx_read_file(file, buf, size, offset); - } - - ngx_log_error(NGX_LOG_CRIT, file->log, n, - "aio_read(\"%V\") failed", &file->name); - - if (n == NGX_ENOSYS) { - ngx_file_aio = 0; - return ngx_read_file(file, buf, size, offset); - } - - return NGX_ERROR; - } - - ngx_log_debug2(NGX_LOG_DEBUG_CORE, file->log, 0, - "aio_read: fd:%d %d", file->fd, n); - - ev->active = 1; - ev->ready = 0; - ev->complete = 0; - - return ngx_file_aio_result(aio->file, aio, ev); -} - - -static ssize_t -ngx_file_aio_result(ngx_file_t *file, ngx_event_aio_t *aio, ngx_event_t *ev) -{ - int n; - ngx_err_t err; - - n = aio_error(&aio->aiocb); - - ngx_log_debug2(NGX_LOG_DEBUG_CORE, file->log, 0, - "aio_error: fd:%d %d", file->fd, n); - - if (n == -1) { - err = ngx_errno; - aio->err = err; - - ngx_log_error(NGX_LOG_ALERT, file->log, err, - "aio_error(\"%V\") failed", &file->name); - return NGX_ERROR; - } - - if (n == NGX_EINPROGRESS) { - if (ev->ready) { - ev->ready = 0; - ngx_log_error(NGX_LOG_ALERT, file->log, n, - "aio_read(\"%V\") still in progress", - &file->name); - } - - return NGX_AGAIN; - } - - n = aio_return(&aio->aiocb); - - if (n == -1) { - err = ngx_errno; - aio->err = err; - ev->ready = 1; - - ngx_log_error(NGX_LOG_CRIT, file->log, err, - "aio_return(\"%V\") failed", &file->name); - return NGX_ERROR; - } - - aio->err = 0; - aio->nbytes = n; - ev->ready = 1; - ev->active = 0; - - ngx_log_debug2(NGX_LOG_DEBUG_CORE, file->log, 0, - "aio_return: fd:%d %d", file->fd, n); - - return n; -} - - -static void -ngx_file_aio_event_handler(ngx_event_t *ev) -{ - ngx_event_aio_t *aio; - - aio = ev->data; - - ngx_log_debug2(NGX_LOG_DEBUG_CORE, ev->log, 0, - "aio event handler fd:%d %V", aio->fd, &aio->file->name); - - if (ngx_file_aio_result(aio->file, aio, ev) != NGX_AGAIN) { - aio->handler(ev); - } -} |