Mercurial > hg > nginx-quic
view src/os/win32/ngx_wsasend.c @ 5405:620808518349
SPDY: ignore priority when queuing blocked frames.
With this change all such frames will be added in front of the output queue, and
will be sent first. It prevents HOL blocking when response with higher priority
is blocked by response with lower priority in the middle of the queue because
the order of their SYN_REPLY frames cannot be changed.
Proposed by Yury Kirpichev.
author | Valentin Bartenev <vbart@nginx.com> |
---|---|
date | Tue, 01 Oct 2013 00:14:37 +0400 |
parents | 53eb1e67e432 |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> ssize_t ngx_wsasend(ngx_connection_t *c, u_char *buf, size_t size) { int n; u_long sent; ngx_err_t err; ngx_event_t *wev; WSABUF wsabuf; wev = c->write; if (!wev->ready) { return NGX_AGAIN; } /* * WSABUF must be 4-byte aligned otherwise * WSASend() will return undocumented WSAEINVAL error. */ wsabuf.buf = (char *) buf; wsabuf.len = size; sent = 0; n = WSASend(c->fd, &wsabuf, 1, &sent, 0, NULL, NULL); ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0, "WSASend: fd:%d, %d, %ul of %uz", c->fd, n, sent, size); if (n == 0) { if (sent < size) { wev->ready = 0; } c->sent += sent; return sent; } err = ngx_socket_errno; if (err == WSAEWOULDBLOCK) { ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, "WSASend() not ready"); wev->ready = 0; return NGX_AGAIN; } wev->error = 1; ngx_connection_error(c, err, "WSASend() failed"); return NGX_ERROR; } ssize_t ngx_overlapped_wsasend(ngx_connection_t *c, u_char *buf, size_t size) { int n; u_long sent; ngx_err_t err; ngx_event_t *wev; LPWSAOVERLAPPED ovlp; WSABUF wsabuf; wev = c->write; if (!wev->ready) { return NGX_AGAIN; } ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "wev->complete: %d", wev->complete); if (!wev->complete) { /* post the overlapped WSASend() */ /* * WSABUFs must be 4-byte aligned otherwise * WSASend() will return undocumented WSAEINVAL error. */ wsabuf.buf = (char *) buf; wsabuf.len = size; sent = 0; ovlp = (LPWSAOVERLAPPED) &c->write->ovlp; ngx_memzero(ovlp, sizeof(WSAOVERLAPPED)); n = WSASend(c->fd, &wsabuf, 1, &sent, 0, ovlp, NULL); ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0, "WSASend: fd:%d, %d, %ul of %uz", c->fd, n, sent, size); wev->complete = 0; if (n == 0) { if (ngx_event_flags & NGX_USE_IOCP_EVENT) { /* * if a socket was bound with I/O completion port then * GetQueuedCompletionStatus() would anyway return its status * despite that WSASend() was already complete */ wev->active = 1; return NGX_AGAIN; } if (sent < size) { wev->ready = 0; } c->sent += sent; return sent; } err = ngx_socket_errno; if (err == WSA_IO_PENDING) { ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, "WSASend() posted"); wev->active = 1; return NGX_AGAIN; } wev->error = 1; ngx_connection_error(c, err, "WSASend() failed"); return NGX_ERROR; } /* the overlapped WSASend() complete */ wev->complete = 0; wev->active = 0; if (ngx_event_flags & NGX_USE_IOCP_EVENT) { if (wev->ovlp.error) { ngx_connection_error(c, wev->ovlp.error, "WSASend() failed"); return NGX_ERROR; } sent = wev->available; } else { if (WSAGetOverlappedResult(c->fd, (LPWSAOVERLAPPED) &wev->ovlp, &sent, 0, NULL) == 0) { ngx_connection_error(c, ngx_socket_errno, "WSASend() or WSAGetOverlappedResult() failed"); return NGX_ERROR; } } ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0, "WSAGetOverlappedResult: fd:%d, %ul of %uz", c->fd, sent, size); if (sent < size) { wev->ready = 0; } c->sent += sent; return sent; }