Mercurial > hg > nginx
view src/os/unix/ngx_aio_write_chain.c @ 185:d5f50cefc322
nginx-0.0.1-2003-11-14-19:52:04 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Fri, 14 Nov 2003 16:52:04 +0000 |
parents | 389d7ee9fa60 |
children | e885208c518b |
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#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) { int n; char *buf, *prev; off_t sent; size_t size; ngx_err_t err; ngx_chain_t *cl; sent = 0; cl = in; while (cl) { if (cl->hunk->last - cl->hunk->pos == 0) { cl = cl->next; continue; } /* we can post the single aio operation only */ if (!c->write->ready) { return cl; } buf = cl->hunk->pos; prev = buf; size = 0; /* coalesce the neighbouring hunks */ while (cl && prev == cl->hunk->pos) { size += cl->hunk->last - cl->hunk->pos; prev = cl->hunk->last; cl = cl->next; } n = ngx_aio_write(c, buf, size); #if (NGX_DEBUG_WRITE_CHAIN) ngx_log_debug(c->log, "aio_write: %d" _ n); #endif if (n == NGX_ERROR) { return NGX_CHAIN_ERROR; } if (n > 0) { sent += n; c->sent += n; } #if (NGX_DEBUG_WRITE_CHAIN) ngx_log_debug(c->log, "aio_write sent: " OFF_FMT _ c->sent); #endif for (cl = in; cl; cl = cl->next) { if (sent >= cl->hunk->last - cl->hunk->pos) { sent -= cl->hunk->last - cl->hunk->pos; cl->hunk->pos = cl->hunk->last; continue; } cl->hunk->pos += sent; break; } } return cl; }