KVM: Update headers (except HIOR mess)
[qemu.git] / os-win32.c
1 /*
2 * os-win32.c
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 * Copyright (c) 2010 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 <windows.h>
26 #include <unistd.h>
27 #include <fcntl.h>
28 #include <signal.h>
29 #include <time.h>
30 #include <errno.h>
31 #include <sys/time.h>
32 #include "config-host.h"
33 #include "sysemu.h"
34 #include "qemu-options.h"
35
36 /***********************************************************/
37 /* Functions missing in mingw */
38
39 int setenv(const char *name, const char *value, int overwrite)
40 {
41 int result = 0;
42 if (overwrite || !getenv(name)) {
43 size_t length = strlen(name) + strlen(value) + 2;
44 char *string = g_malloc(length);
45 snprintf(string, length, "%s=%s", name, value);
46 result = putenv(string);
47
48 /* Windows takes a copy and does not continue to use our string.
49 * Therefore it can be safely freed on this platform. POSIX code
50 * typically has to leak the string because according to the spec it
51 * becomes part of the environment.
52 */
53 g_free(string);
54 }
55 return result;
56 }
57
58 static BOOL WINAPI qemu_ctrl_handler(DWORD type)
59 {
60 exit(STATUS_CONTROL_C_EXIT);
61 return TRUE;
62 }
63
64 void os_setup_early_signal_handling(void)
65 {
66 /* Note: cpu_interrupt() is currently not SMP safe, so we force
67 QEMU to run on a single CPU */
68 HANDLE h;
69 DWORD_PTR mask, smask;
70 int i;
71
72 SetConsoleCtrlHandler(qemu_ctrl_handler, TRUE);
73
74 h = GetCurrentProcess();
75 if (GetProcessAffinityMask(h, &mask, &smask)) {
76 for(i = 0; i < 32; i++) {
77 if (mask & (1 << i))
78 break;
79 }
80 if (i != 32) {
81 mask = 1 << i;
82 SetProcessAffinityMask(h, mask);
83 }
84 }
85 }
86
87 /* Look for support files in the same directory as the executable. */
88 char *os_find_datadir(const char *argv0)
89 {
90 char *p;
91 char buf[MAX_PATH];
92 DWORD len;
93
94 len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
95 if (len == 0) {
96 return NULL;
97 }
98
99 buf[len] = 0;
100 p = buf + len - 1;
101 while (p != buf && *p != '\\')
102 p--;
103 *p = 0;
104 if (access(buf, R_OK) == 0) {
105 return g_strdup(buf);
106 }
107 return NULL;
108 }
109
110 void os_set_line_buffering(void)
111 {
112 setbuf(stdout, NULL);
113 setbuf(stderr, NULL);
114 }
115
116 /*
117 * Parse OS specific command line options.
118 * return 0 if option handled, -1 otherwise
119 */
120 void os_parse_cmd_args(int index, const char *optarg)
121 {
122 return;
123 }
124
125 void os_pidfile_error(void)
126 {
127 fprintf(stderr, "Could not acquire pid file: %s\n", strerror(errno));
128 }
129
130 int qemu_create_pidfile(const char *filename)
131 {
132 char buffer[128];
133 int len;
134 HANDLE file;
135 OVERLAPPED overlap;
136 BOOL ret;
137 memset(&overlap, 0, sizeof(overlap));
138
139 file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL,
140 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
141
142 if (file == INVALID_HANDLE_VALUE) {
143 return -1;
144 }
145 len = snprintf(buffer, sizeof(buffer), "%d\n", getpid());
146 ret = WriteFile(file, (LPCVOID)buffer, (DWORD)len,
147 NULL, &overlap);
148 CloseHandle(file);
149 if (ret == 0) {
150 return -1;
151 }
152 return 0;
153 }