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c1b0b93b JS |
1 | /* |
2 | * os-posix-lib.c | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
5 | * Copyright (c) 2010 Red Hat, Inc. | |
6 | * | |
7 | * QEMU library functions on POSIX which are shared between QEMU and | |
8 | * the QEMU tools. | |
9 | * | |
10 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
11 | * of this software and associated documentation files (the "Software"), to deal | |
12 | * in the Software without restriction, including without limitation the rights | |
13 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
14 | * copies of the Software, and to permit persons to whom the Software is | |
15 | * furnished to do so, subject to the following conditions: | |
16 | * | |
17 | * The above copyright notice and this permission notice shall be included in | |
18 | * all copies or substantial portions of the Software. | |
19 | * | |
20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
23 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
24 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
25 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
26 | * THE SOFTWARE. | |
27 | */ | |
28 | ||
29 | #include "config-host.h" | |
30 | #include "sysemu.h" | |
31 | #include "trace.h" | |
9549e764 | 32 | #include "qemu_socket.h" |
c1b0b93b JS |
33 | |
34 | #if !defined(_POSIX_C_SOURCE) || defined(__sun__) | |
35 | static void *oom_check(void *ptr) | |
36 | { | |
37 | if (ptr == NULL) { | |
38 | fprintf(stderr, "Failed to allocate memory: %s\n", strerror(errno)); | |
39 | abort(); | |
40 | } | |
41 | return ptr; | |
42 | } | |
43 | #endif | |
44 | ||
45 | void *qemu_memalign(size_t alignment, size_t size) | |
46 | { | |
47 | void *ptr; | |
48 | #if defined(_POSIX_C_SOURCE) && !defined(__sun__) | |
49 | int ret; | |
50 | ret = posix_memalign(&ptr, alignment, size); | |
51 | if (ret != 0) { | |
52 | fprintf(stderr, "Failed to allocate %zu B: %s\n", | |
53 | size, strerror(ret)); | |
54 | abort(); | |
55 | } | |
56 | #elif defined(CONFIG_BSD) | |
57 | ptr = oom_check(valloc(size)); | |
58 | #else | |
59 | ptr = oom_check(memalign(alignment, size)); | |
60 | #endif | |
61 | trace_qemu_memalign(alignment, size, ptr); | |
62 | return ptr; | |
63 | } | |
64 | ||
65 | /* alloc shared memory pages */ | |
66 | void *qemu_vmalloc(size_t size) | |
67 | { | |
68 | return qemu_memalign(getpagesize(), size); | |
69 | } | |
70 | ||
71 | void qemu_vfree(void *ptr) | |
72 | { | |
73 | trace_qemu_vfree(ptr); | |
74 | free(ptr); | |
75 | } | |
9549e764 JS |
76 | |
77 | void socket_set_nonblock(int fd) | |
78 | { | |
79 | int f; | |
80 | f = fcntl(fd, F_GETFL); | |
81 | fcntl(fd, F_SETFL, f | O_NONBLOCK); | |
82 | } | |
83 | ||
84 | void qemu_set_cloexec(int fd) | |
85 | { | |
86 | int f; | |
87 | f = fcntl(fd, F_GETFD); | |
88 | fcntl(fd, F_SETFD, f | FD_CLOEXEC); | |
89 | } |