2 * QEMU low level functions
4 * Copyright (c) 2003 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
32 /* Needed early for CONFIG_BSD etc. */
33 #include "config-host.h"
36 #include <sys/types.h>
37 #include <sys/statvfs.h>
42 #elif defined(CONFIG_BSD)
48 #include "qemu-common.h"
50 #include "qemu_socket.h"
52 #if !defined(_POSIX_C_SOURCE) || defined(_WIN32) || defined(__sun__)
53 static void *oom_check(void *ptr)
57 fprintf(stderr, "Failed to allocate memory: %lu\n", GetLastError());
59 fprintf(stderr, "Failed to allocate memory: %s\n", strerror(errno));
68 void *qemu_memalign(size_t alignment, size_t size)
73 return oom_check(VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE));
76 void *qemu_vmalloc(size_t size)
78 /* FIXME: this is not exactly optimal solution since VirtualAlloc
79 has 64Kb granularity, but at least it guarantees us that the
80 memory is page aligned. */
84 return oom_check(VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE));
87 void qemu_vfree(void *ptr)
89 VirtualFree(ptr, 0, MEM_RELEASE);
94 void *qemu_memalign(size_t alignment, size_t size)
96 #if defined(_POSIX_C_SOURCE) && !defined(__sun__)
99 ret = posix_memalign(&ptr, alignment, size);
101 fprintf(stderr, "Failed to allocate %zu B: %s\n",
102 size, strerror(ret));
106 #elif defined(CONFIG_BSD)
107 return oom_check(valloc(size));
109 return oom_check(memalign(alignment, size));
113 /* alloc shared memory pages */
114 void *qemu_vmalloc(size_t size)
116 return qemu_memalign(getpagesize(), size);
119 void qemu_vfree(void *ptr)
126 int qemu_create_pidfile(const char *filename)
133 fd = qemu_open(filename, O_RDWR | O_CREAT, 0600);
137 if (lockf(fd, F_TLOCK, 0) == -1)
140 len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
141 if (write(fd, buffer, len) != len)
147 memset(&overlap, 0, sizeof(overlap));
149 file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL,
150 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
152 if (file == INVALID_HANDLE_VALUE)
155 len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
156 ret = WriteFileEx(file, (LPCVOID)buffer, (DWORD)len,
166 /* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
167 #define _W32_FT_OFFSET (116444736000000000ULL)
169 int qemu_gettimeofday(qemu_timeval *tp)
172 unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
178 GetSystemTimeAsFileTime (&_now.ft);
179 tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
180 tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
182 /* Always return 0 as per Open Group Base Specifications Issue 6.
183 Do not set errno on error. */
190 void socket_set_nonblock(int fd)
192 unsigned long opt = 1;
193 ioctlsocket(fd, FIONBIO, &opt);
196 int inet_aton(const char *cp, struct in_addr *ia)
198 uint32_t addr = inet_addr(cp);
199 if (addr == 0xffffffff)
205 void qemu_set_cloexec(int fd)
211 void socket_set_nonblock(int fd)
214 f = fcntl(fd, F_GETFL);
215 fcntl(fd, F_SETFL, f | O_NONBLOCK);
218 void qemu_set_cloexec(int fd)
221 f = fcntl(fd, F_GETFD);
222 fcntl(fd, F_SETFD, f | FD_CLOEXEC);
228 * Opens a file with FD_CLOEXEC set
230 int qemu_open(const char *name, int flags, ...)
235 if (flags & O_CREAT) {
239 mode = va_arg(ap, int);
244 ret = open(name, flags | O_CLOEXEC, mode);
246 ret = open(name, flags, mode);
248 qemu_set_cloexec(ret);
256 * A variant of write(2) which handles partial write.
258 * Return the number of bytes transferred.
259 * Set errno if fewer than `count' bytes are written.
261 ssize_t qemu_write_full(int fd, const void *buf, size_t count)
267 ret = write(fd, buf, count);
284 * Creates a pipe with FD_CLOEXEC set on both file descriptors
286 int qemu_pipe(int pipefd[2])
291 ret = pipe2(pipefd, O_CLOEXEC);
292 if (ret != -1 || errno != ENOSYS) {
298 qemu_set_cloexec(pipefd[0]);
299 qemu_set_cloexec(pipefd[1]);
307 * Opens a socket with FD_CLOEXEC set
309 int qemu_socket(int domain, int type, int protocol)
314 ret = socket(domain, type | SOCK_CLOEXEC, protocol);
315 if (ret != -1 || errno != EINVAL) {
319 ret = socket(domain, type, protocol);
321 qemu_set_cloexec(ret);
328 * Accept a connection and set FD_CLOEXEC
330 int qemu_accept(int s, struct sockaddr *addr, socklen_t *addrlen)
334 #ifdef CONFIG_ACCEPT4
335 ret = accept4(s, addr, addrlen, SOCK_CLOEXEC);
336 if (ret != -1 || errno != ENOSYS) {
340 ret = accept(s, addr, addrlen);
342 qemu_set_cloexec(ret);