Mercurial > hg > nginx
diff src/os/win32/ngx_wsarecv.c @ 103:6dfda4cf5200
nginx-0.0.1-2003-06-11-19:28:34 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Wed, 11 Jun 2003 15:28:34 +0000 |
parents | |
children | ef8c87afcfc5 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/os/win32/ngx_wsarecv.c Wed Jun 11 15:28:34 2003 +0000 @@ -0,0 +1,90 @@ + +#include <ngx_config.h> +#include <ngx_core.h> +#include <ngx_event.h> + + +ssize_t ngx_wsarecv(ngx_connection_t *c, char *buf, size_t size) +{ + int rc; + u_int flags; + size_t bytes; + WSABUF wsabuf[1]; + ngx_err_t err; + ngx_event_t *rev; + LPWSAOVERLAPPED ovlp; + + rev = c->read; + bytes = 0; + + if ((ngx_event_flags & NGX_HAVE_AIO_EVENT) && rev->ready) { + rev->ready = 0; + + /* the overlapped WSARecv() completed */ + + if (ngx_event_flags & NGX_HAVE_IOCP_EVENT) { + if (rev->ovlp.error) { + ngx_log_error(NGX_LOG_ERR, c->log, rev->ovlp.error, + "WSARecv() failed"); + return NGX_ERROR; + } + + return rev->available; + } + + if (WSAGetOverlappedResult(c->fd, (LPWSAOVERLAPPED) &rev->ovlp, + &bytes, 0, NULL) == 0) { + err = ngx_socket_errno; + ngx_log_error(NGX_LOG_CRIT, c->log, err, + "WSARecv() or WSAGetOverlappedResult() failed"); + + return NGX_ERROR; + } + + return bytes; + } + + if (ngx_event_flags & NGX_HAVE_AIO_EVENT) { + ovlp = (LPWSAOVERLAPPED) &c->read->ovlp; + ngx_memzero(ovlp, sizeof(WSAOVERLAPPED)); + + } else { + ovlp = NULL; + } + + wsabuf[0].buf = buf; + wsabuf[0].len = size; + flags = 0; + + rc = WSARecv(c->fd, wsabuf, 1, &bytes, &flags, ovlp, NULL); + + ngx_log_debug(c->log, "WSARecv: %d:%d" _ rc _ bytes); + + if (rc == -1) { + err = ngx_socket_errno; + if (err == WSA_IO_PENDING) { + return NGX_AGAIN; + + } else if (err == WSAEWOULDBLOCK) { + ngx_log_error(NGX_LOG_INFO, c->log, err, "WSARecv() EAGAIN"); + return NGX_AGAIN; + + } else { + ngx_log_error(NGX_LOG_CRIT, c->log, err, "WSARecv() failed"); + return NGX_ERROR; + } + } + + if (ngx_event_flags & NGX_HAVE_IOCP_EVENT) { + + /* + * If a socket was bound with I/O completion port + * then GetQueuedCompletionStatus() would anyway return its status + * despite that WSARecv() was already completed. + */ + + return NGX_AGAIN; + } + + return bytes; +}