projects / qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| 8c5135f9 PB |
1 | /* |
| 2 | * Coroutine-aware I/O functions | |
| 3 | * | |
| 4 | * Copyright (C) 2009-2010 Nippon Telegraph and Telephone Corporation. | |
| 5 | * Copyright (c) 2011, Red Hat, Inc. | |
| 6 | * | |
| 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: | |
| 13 | * | |
| 14 | * The above copyright notice and this permission notice shall be included in | |
| 15 | * all copies or substantial portions of the Software. | |
| 16 | * | |
| 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 | |
| 23 | * THE SOFTWARE. | |
| 24 | */ | |
| 25 | #include "qemu-common.h" | |
| 26 | #include "qemu_socket.h" | |
| 27 | #include "qemu-coroutine.h" | |
| 28 | ||
| 29 | int coroutine_fn qemu_co_recvv(int sockfd, struct iovec *iov, | |
| 30 | int len, int iov_offset) | |
| 31 | { | |
| 32 | int total = 0; | |
| 33 | int ret; | |
| 34 | while (len) { | |
| 35 | ret = qemu_recvv(sockfd, iov, len, iov_offset + total); | |
| 36 | if (ret < 0) { | |
| 37 | if (errno == EAGAIN) { | |
| 38 | qemu_coroutine_yield(); | |
| 39 | continue; | |
| 40 | } | |
| 41 | if (total == 0) { | |
| 42 | total = -1; | |
| 43 | } | |
| 44 | break; | |
| 45 | } | |
| 46 | if (ret == 0) { | |
| 47 | break; | |
| 48 | } | |
| 49 | total += ret, len -= ret; | |
| 50 | } | |
| 51 | ||
| 52 | return total; | |
| 53 | } | |
| 54 | ||
| 55 | int coroutine_fn qemu_co_sendv(int sockfd, struct iovec *iov, | |
| 56 | int len, int iov_offset) | |
| 57 | { | |
| 58 | int total = 0; | |
| 59 | int ret; | |
| 60 | while (len) { | |
| 61 | ret = qemu_sendv(sockfd, iov, len, iov_offset + total); | |
| 62 | if (ret < 0) { | |
| 63 | if (errno == EAGAIN) { | |
| 64 | qemu_coroutine_yield(); | |
| 65 | continue; | |
| 66 | } | |
| 67 | if (total == 0) { | |
| 68 | total = -1; | |
| 69 | } | |
| 70 | break; | |
| 71 | } | |
| 72 | total += ret, len -= ret; | |
| 73 | } | |
| 74 | ||
| 75 | return total; | |
| 76 | } | |
| 77 | ||
| 78 | int coroutine_fn qemu_co_recv(int sockfd, void *buf, int len) | |
| 79 | { | |
| 80 | struct iovec iov; | |
| 81 | ||
| 82 | iov.iov_base = buf; | |
| 83 | iov.iov_len = len; | |
| 84 | ||
| 85 | return qemu_co_recvv(sockfd, &iov, len, 0); | |
| 86 | } | |
| 87 | ||
| 88 | int coroutine_fn qemu_co_send(int sockfd, void *buf, int len) | |
| 89 | { | |
| 90 | struct iovec iov; | |
| 91 | ||
| 92 | iov.iov_base = buf; | |
| 93 | iov.iov_len = len; | |
| 94 | ||
| 95 | return qemu_co_sendv(sockfd, &iov, len, 0); | |
| 96 | } |