root / qemu-coroutine-io.c @ 93148aa5
History | View | Annotate | Download (2.7 kB)
1 | 8c5135f9 | Paolo Bonzini | /*
|
---|---|---|---|
2 | 8c5135f9 | Paolo Bonzini | * Coroutine-aware I/O functions
|
3 | 8c5135f9 | Paolo Bonzini | *
|
4 | 8c5135f9 | Paolo Bonzini | * Copyright (C) 2009-2010 Nippon Telegraph and Telephone Corporation.
|
5 | 8c5135f9 | Paolo Bonzini | * Copyright (c) 2011, Red Hat, Inc.
|
6 | 8c5135f9 | Paolo Bonzini | *
|
7 | 8c5135f9 | Paolo Bonzini | * Permission is hereby granted, free of charge, to any person obtaining a copy
|
8 | 8c5135f9 | Paolo Bonzini | * of this software and associated documentation files (the "Software"), to deal
|
9 | 8c5135f9 | Paolo Bonzini | * in the Software without restriction, including without limitation the rights
|
10 | 8c5135f9 | Paolo Bonzini | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
11 | 8c5135f9 | Paolo Bonzini | * copies of the Software, and to permit persons to whom the Software is
|
12 | 8c5135f9 | Paolo Bonzini | * furnished to do so, subject to the following conditions:
|
13 | 8c5135f9 | Paolo Bonzini | *
|
14 | 8c5135f9 | Paolo Bonzini | * The above copyright notice and this permission notice shall be included in
|
15 | 8c5135f9 | Paolo Bonzini | * all copies or substantial portions of the Software.
|
16 | 8c5135f9 | Paolo Bonzini | *
|
17 | 8c5135f9 | Paolo Bonzini | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
18 | 8c5135f9 | Paolo Bonzini | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
19 | 8c5135f9 | Paolo Bonzini | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
20 | 8c5135f9 | Paolo Bonzini | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
21 | 8c5135f9 | Paolo Bonzini | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
22 | 8c5135f9 | Paolo Bonzini | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
23 | 8c5135f9 | Paolo Bonzini | * THE SOFTWARE.
|
24 | 8c5135f9 | Paolo Bonzini | */
|
25 | 8c5135f9 | Paolo Bonzini | #include "qemu-common.h" |
26 | 8c5135f9 | Paolo Bonzini | #include "qemu_socket.h" |
27 | 8c5135f9 | Paolo Bonzini | #include "qemu-coroutine.h" |
28 | 8c5135f9 | Paolo Bonzini | |
29 | 8c5135f9 | Paolo Bonzini | int coroutine_fn qemu_co_recvv(int sockfd, struct iovec *iov, |
30 | 8c5135f9 | Paolo Bonzini | int len, int iov_offset) |
31 | 8c5135f9 | Paolo Bonzini | { |
32 | 8c5135f9 | Paolo Bonzini | int total = 0; |
33 | 8c5135f9 | Paolo Bonzini | int ret;
|
34 | 8c5135f9 | Paolo Bonzini | while (len) {
|
35 | 8c5135f9 | Paolo Bonzini | ret = qemu_recvv(sockfd, iov, len, iov_offset + total); |
36 | 8c5135f9 | Paolo Bonzini | if (ret < 0) { |
37 | 8c5135f9 | Paolo Bonzini | if (errno == EAGAIN) {
|
38 | 8c5135f9 | Paolo Bonzini | qemu_coroutine_yield(); |
39 | 8c5135f9 | Paolo Bonzini | continue;
|
40 | 8c5135f9 | Paolo Bonzini | } |
41 | 8c5135f9 | Paolo Bonzini | if (total == 0) { |
42 | 8c5135f9 | Paolo Bonzini | total = -1;
|
43 | 8c5135f9 | Paolo Bonzini | } |
44 | 8c5135f9 | Paolo Bonzini | break;
|
45 | 8c5135f9 | Paolo Bonzini | } |
46 | 8c5135f9 | Paolo Bonzini | if (ret == 0) { |
47 | 8c5135f9 | Paolo Bonzini | break;
|
48 | 8c5135f9 | Paolo Bonzini | } |
49 | 8c5135f9 | Paolo Bonzini | total += ret, len -= ret; |
50 | 8c5135f9 | Paolo Bonzini | } |
51 | 8c5135f9 | Paolo Bonzini | |
52 | 8c5135f9 | Paolo Bonzini | return total;
|
53 | 8c5135f9 | Paolo Bonzini | } |
54 | 8c5135f9 | Paolo Bonzini | |
55 | 8c5135f9 | Paolo Bonzini | int coroutine_fn qemu_co_sendv(int sockfd, struct iovec *iov, |
56 | 8c5135f9 | Paolo Bonzini | int len, int iov_offset) |
57 | 8c5135f9 | Paolo Bonzini | { |
58 | 8c5135f9 | Paolo Bonzini | int total = 0; |
59 | 8c5135f9 | Paolo Bonzini | int ret;
|
60 | 8c5135f9 | Paolo Bonzini | while (len) {
|
61 | 8c5135f9 | Paolo Bonzini | ret = qemu_sendv(sockfd, iov, len, iov_offset + total); |
62 | 8c5135f9 | Paolo Bonzini | if (ret < 0) { |
63 | 8c5135f9 | Paolo Bonzini | if (errno == EAGAIN) {
|
64 | 8c5135f9 | Paolo Bonzini | qemu_coroutine_yield(); |
65 | 8c5135f9 | Paolo Bonzini | continue;
|
66 | 8c5135f9 | Paolo Bonzini | } |
67 | 8c5135f9 | Paolo Bonzini | if (total == 0) { |
68 | 8c5135f9 | Paolo Bonzini | total = -1;
|
69 | 8c5135f9 | Paolo Bonzini | } |
70 | 8c5135f9 | Paolo Bonzini | break;
|
71 | 8c5135f9 | Paolo Bonzini | } |
72 | 8c5135f9 | Paolo Bonzini | total += ret, len -= ret; |
73 | 8c5135f9 | Paolo Bonzini | } |
74 | 8c5135f9 | Paolo Bonzini | |
75 | 8c5135f9 | Paolo Bonzini | return total;
|
76 | 8c5135f9 | Paolo Bonzini | } |
77 | 8c5135f9 | Paolo Bonzini | |
78 | 8c5135f9 | Paolo Bonzini | int coroutine_fn qemu_co_recv(int sockfd, void *buf, int len) |
79 | 8c5135f9 | Paolo Bonzini | { |
80 | 8c5135f9 | Paolo Bonzini | struct iovec iov;
|
81 | 8c5135f9 | Paolo Bonzini | |
82 | 8c5135f9 | Paolo Bonzini | iov.iov_base = buf; |
83 | 8c5135f9 | Paolo Bonzini | iov.iov_len = len; |
84 | 8c5135f9 | Paolo Bonzini | |
85 | 8c5135f9 | Paolo Bonzini | return qemu_co_recvv(sockfd, &iov, len, 0); |
86 | 8c5135f9 | Paolo Bonzini | } |
87 | 8c5135f9 | Paolo Bonzini | |
88 | 8c5135f9 | Paolo Bonzini | int coroutine_fn qemu_co_send(int sockfd, void *buf, int len) |
89 | 8c5135f9 | Paolo Bonzini | { |
90 | 8c5135f9 | Paolo Bonzini | struct iovec iov;
|
91 | 8c5135f9 | Paolo Bonzini | |
92 | 8c5135f9 | Paolo Bonzini | iov.iov_base = buf; |
93 | 8c5135f9 | Paolo Bonzini | iov.iov_len = len; |
94 | 8c5135f9 | Paolo Bonzini | |
95 | 8c5135f9 | Paolo Bonzini | return qemu_co_sendv(sockfd, &iov, len, 0); |
96 | 8c5135f9 | Paolo Bonzini | } |