Mercurial > hg > nginx-quic
view src/os/unix/ngx_writev_chain.c @ 173:4fb2a2cff023
nginx-0.0.1-2003-11-04-20:09:19 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Tue, 04 Nov 2003 17:09:19 +0000 |
parents | c42be4185301 |
children | 1bf718ce0dde |
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#include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> ngx_chain_t *ngx_writev_chain(ngx_connection_t *c, ngx_chain_t *in) { char *prev; ssize_t n, size; off_t sent; struct iovec *iov; ngx_err_t err; ngx_array_t io; ngx_chain_t *cl; if (!c->write->ready) { return in; } ngx_init_array(io, c->pool, 10, sizeof(struct iovec), NGX_CHAIN_ERROR); prev = NULL; iov = NULL; /* create the iovec and coalesce the neighbouring hunks */ for (cl = in; cl; cl = cl->next) { if (prev == cl->hunk->pos) { iov->iov_len += cl->hunk->last - cl->hunk->pos; prev = cl->hunk->last; } else { ngx_test_null(iov, ngx_push_array(&io), NGX_CHAIN_ERROR); iov->iov_base = cl->hunk->pos; iov->iov_len = cl->hunk->last - cl->hunk->pos; prev = cl->hunk->last; } } n = writev(c->fd, io.elts, io.nelts); if (n == -1) { err = ngx_errno; if (err == NGX_EAGAIN) { ngx_log_error(NGX_LOG_INFO, c->log, err, "writev() EAGAIN"); } else if (err == NGX_EINTR) { ngx_log_error(NGX_LOG_INFO, c->log, err, "writev() EINTR"); } else { ngx_log_error(NGX_LOG_CRIT, c->log, err, "writev() failed"); return NGX_CHAIN_ERROR; } } sent = n > 0 ? n : 0; #if (NGX_DEBUG_WRITE_CHAIN) ngx_log_debug(c->log, "writev: %qd" _ sent); #endif c->sent += sent; for (cl = in; cl && sent > 0; cl = cl->next) { size = cl->hunk->last - cl->hunk->pos; ngx_log_debug(c->log, "SIZE: %d" _ size); if (sent >= size) { sent -= size; if (cl->hunk->type & NGX_HUNK_IN_MEMORY) { cl->hunk->pos = cl->hunk->last; } #if 0 if (cl->hunk->type & NGX_HUNK_FILE) { cl->hunk->file_pos = cl->hunk->file_last; } #endif continue; } if (cl->hunk->type & NGX_HUNK_IN_MEMORY) { cl->hunk->pos += sent; } #if 0 if (cl->hunk->type & NGX_HUNK_FILE) { cl->hunk->file_pos += sent; } #endif break; } return cl; }