Mercurial > hg > nginx-quic
view src/os/unix/ngx_aio_write_chain.c @ 681:7e24168b0853 release-0.4.0
nginx-0.4.0-RELEASE import
*) Change in internal API: the HTTP modules initialization was moved
from the init module phase to the HTTP postconfiguration phase.
*) Change: now the request body is not read beforehand for the
ngx_http_perl_module: it's required to start the reading using the
$r->has_request_body method.
*) Feature: the ngx_http_perl_module supports the DECLINED return code.
*) Feature: the ngx_http_dav_module supports the incoming "Date" header
line for the PUT method.
*) Feature: the "ssi" directive is available inside the "if" block.
*) Bugfix: a segmentation fault occurred if there was an "index"
directive with variables and the first index name was without
variables; the bug had appeared in 0.1.29.
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Wed, 30 Aug 2006 10:39:17 +0000 |
parents | 4d9ea73a627a |
children | f69d1aab6a0f |
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/* * Copyright (C) Igor Sysoev */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #include <ngx_aio.h> ngx_chain_t * ngx_aio_write_chain(ngx_connection_t *c, ngx_chain_t *in, off_t limit) { u_char *buf, *prev; off_t send, sent; size_t len; ssize_t n, size; ngx_chain_t *cl; /* the maximum limit size is the maximum size_t value - the page size */ if (limit == 0 || limit > NGX_MAX_SIZE_T_VALUE - ngx_pagesize) { limit = NGX_MAX_SIZE_T_VALUE - ngx_pagesize; } send = 0; sent = 0; cl = in; while (cl) { if (cl->buf->pos == cl->buf->last) { cl = cl->next; continue; } /* we can post the single aio operation only */ if (!c->write->ready) { return cl; } buf = cl->buf->pos; prev = buf; len = 0; /* coalesce the neighbouring bufs */ while (cl && prev == cl->buf->pos && send < limit) { if (ngx_buf_special(cl->buf)) { continue; } size = cl->buf->last - cl->buf->pos; if (send + size > limit) { size = limit - send; } len += size; prev = cl->buf->pos + size; send += size; cl = cl->next; } n = ngx_aio_write(c, buf, len); ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "aio_write: %z", n); if (n == NGX_ERROR) { return NGX_CHAIN_ERROR; } if (n > 0) { sent += n; c->sent += n; } ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "aio_write sent: %O", c->sent); for (cl = in; cl; cl = cl->next) { if (sent >= cl->buf->last - cl->buf->pos) { sent -= cl->buf->last - cl->buf->pos; cl->buf->pos = cl->buf->last; continue; } cl->buf->pos += sent; break; } } return cl; }