Mercurial > hg > nginx-vendor-0-8
view src/os/unix/ngx_aio_read_chain.c @ 278:704622b2528a NGINX_0_5_9
nginx 0.5.9
*) Change: now the ngx_http_memcached_module uses the $memcached_key
variable value as a key.
*) Feature: the $memcached_key variable.
*) Feature: the "clean" parameter in the "client_body_in_file_only"
directive.
*) Feature: the "env" directive.
*) Feature: the "sendfile" directive is available inside the "if" block.
*) Feature: now on failure of the writing to access nginx logs a
message to error_log, but not more often than once a minute.
*) Bugfix: the "access_log off" directive did not always turn off the
logging.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Thu, 25 Jan 2007 00:00:00 +0300 |
parents | df17fbafec8f |
children | 86dad910eeb6 |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #include <ngx_aio.h> ssize_t ngx_aio_read_chain(ngx_connection_t *c, ngx_chain_t *cl) { int n; u_char *buf, *prev; size_t size; ssize_t total; if (c->read->pending_eof) { c->read->ready = 0; return 0; } total = 0; while (cl) { /* we can post the single aio operation only */ if (!c->read->ready) { return total ? total : NGX_AGAIN; } buf = cl->buf->last; prev = cl->buf->last; size = 0; /* coalesce the neighbouring bufs */ while (cl && prev == cl->buf->last) { size += cl->buf->end - cl->buf->last; prev = cl->buf->end; cl = cl->next; } n = ngx_aio_read(c, buf, size); ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "aio_read: %d", n); if (n == NGX_AGAIN) { return total ? total : NGX_AGAIN; } if (n == NGX_ERROR) { return NGX_ERROR; } if (n == 0) { c->read->pending_eof = 1; if (total) { c->read->eof = 0; c->read->ready = 1; } return total; } if (n > 0) { total += n; } ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "aio_read total: %d", total); } return total ? total : NGX_AGAIN; }