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git.proxmox.com Git - qemu.git/blob - qemu-coroutine-io.c
2 * Coroutine-aware I/O functions
4 * Copyright (C) 2009-2010 Nippon Telegraph and Telephone Corporation.
5 * Copyright (c) 2011, Red Hat, Inc.
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 #include "qemu-common.h"
26 #include "qemu_socket.h"
27 #include "qemu-coroutine.h"
30 int coroutine_fn
qemu_co_recvv(int sockfd
, struct iovec
*iov
,
31 int len
, int iov_offset
)
36 ret
= iov_recv(sockfd
, iov
, iov_offset
+ total
, len
);
38 if (errno
== EAGAIN
) {
39 qemu_coroutine_yield();
50 total
+= ret
, len
-= ret
;
56 int coroutine_fn
qemu_co_sendv(int sockfd
, struct iovec
*iov
,
57 int len
, int iov_offset
)
62 ret
= iov_send(sockfd
, iov
, iov_offset
+ total
, len
);
64 if (errno
== EAGAIN
) {
65 qemu_coroutine_yield();
73 total
+= ret
, len
-= ret
;
79 int coroutine_fn
qemu_co_recv(int sockfd
, void *buf
, int len
)
86 return qemu_co_recvv(sockfd
, &iov
, len
, 0);
89 int coroutine_fn
qemu_co_send(int sockfd
, void *buf
, int len
)
96 return qemu_co_sendv(sockfd
, &iov
, len
, 0);