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git.proxmox.com Git - qemu.git/blob - oslib-posix.c
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 * Copyright (c) 2010 Red Hat, Inc.
7 * QEMU library functions on POSIX which are shared between QEMU and
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:
17 * The above copyright notice and this permission notice shall be included in
18 * all copies or substantial portions of the Software.
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
29 #include "config-host.h"
32 #include "qemu_socket.h"
34 #if !defined(_POSIX_C_SOURCE) || defined(__sun__)
35 static void *oom_check(void *ptr
)
38 fprintf(stderr
, "Failed to allocate memory: %s\n", strerror(errno
));
45 void *qemu_memalign(size_t alignment
, size_t size
)
48 #if defined(_POSIX_C_SOURCE) && !defined(__sun__)
50 ret
= posix_memalign(&ptr
, alignment
, size
);
52 fprintf(stderr
, "Failed to allocate %zu B: %s\n",
56 #elif defined(CONFIG_BSD)
57 ptr
= oom_check(valloc(size
));
59 ptr
= oom_check(memalign(alignment
, size
));
61 trace_qemu_memalign(alignment
, size
, ptr
);
65 /* alloc shared memory pages */
66 void *qemu_vmalloc(size_t size
)
68 return qemu_memalign(getpagesize(), size
);
71 void qemu_vfree(void *ptr
)
73 trace_qemu_vfree(ptr
);
77 void socket_set_nonblock(int fd
)
80 f
= fcntl(fd
, F_GETFL
);
81 fcntl(fd
, F_SETFL
, f
| O_NONBLOCK
);
84 void qemu_set_cloexec(int fd
)
87 f
= fcntl(fd
, F_GETFD
);
88 fcntl(fd
, F_SETFD
, f
| FD_CLOEXEC
);