Mercurial > hg > nginx
diff src/os/unix/ngx_aio_write_chain.c @ 63:36d2c25cc9bb
nginx-0.0.1-2003-02-26-23:21:43 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Wed, 26 Feb 2003 20:21:43 +0000 |
parents | |
children | 738fe44c70d5 |
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new file mode 100644 --- /dev/null +++ b/src/os/unix/ngx_aio_write_chain.c @@ -0,0 +1,92 @@ + +#include <ngx_config.h> + +#include <ngx_core.h> +#include <ngx_types.h> +#include <ngx_alloc.h> +#include <ngx_array.h> +#include <ngx_hunk.h> +#include <ngx_connection.h> +#include <ngx_sendv.h> +#include <ngx_sendfile.h> + + +ngx_chain_t *ngx_aio_write_chain(ngx_connection_t *c, ngx_chain_t *in) +{ + int rc; + char *buf, *prev; + off_t sent; + size_t size; + ngx_err_t err; + ngx_chain_t *ce; + + sent = 0; + ce = in; + + while (ce) { + +ngx_log_debug(c->log, "aio_write ce: %x" _ ce->hunk->pos.mem); + + buf = prev = ce->hunk->pos.mem; + size = 0; + + /* coalesce the neighbouring chain entries */ + while (ce && prev == ce->hunk->pos.mem) { + size += ce->hunk->last.mem - ce->hunk->pos.mem; + prev = ce->hunk->last.mem; + ce = ce->next; + } + + rc = ngx_event_aio_write(c, buf, size); + +ngx_log_debug(c->log, "aio_write rc: %d" _ rc); + + if (rc > 0) { + sent += rc; + c->sent += rc; + + } else if (rc == NGX_ERROR) { + return NGX_CHAIN_ERROR; + + } else if (rc == NGX_AGAIN) { + break; + } + } + +#if (NGX_DEBUG_WRITE_CHAIN) + ngx_log_debug(c->log, "aio_write sent: " OFF_FMT _ c->sent); +#endif + + for (ce = in; ce; ce = ce->next) { + +#if (NGX_DEBUG_WRITE_CHAIN) + ngx_log_debug(c->log, "write chain: %x %qx %qd" _ + ce->hunk->type _ + ce->hunk->pos.file _ + ce->hunk->last.file - ce->hunk->pos.file); +#endif + + if (sent >= ce->hunk->last.file - ce->hunk->pos.file) { + sent -= ce->hunk->last.file - ce->hunk->pos.file; + ce->hunk->pos.file = ce->hunk->last.file; + +#if (NGX_DEBUG_WRITE_CHAIN) + ngx_log_debug(c->log, "write chain done: %qx %qd" _ + ce->hunk->pos.file _ sent); +#endif + continue; + } + + ce->hunk->pos.file += sent; + +#if (NGX_DEBUG_WRITE_CHAIN) + ngx_log_debug(c->log, "write chain rest: %qx %qd" _ + ce->hunk->pos.file _ + ce->hunk->last.file - ce->hunk->pos.file); +#endif + + break; + } + + return ce; +}