util/oslib-win32.c

   1 /*
   2  * os-win32.c
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  * Copyright (c) 2010 Red Hat, Inc.
   6  *
   7  * QEMU library functions for win32 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 #include <windows.h>
  29 #include <glib.h>
  30 #include <stdlib.h>
  31 #include "config-host.h"
  32 #include "sysemu/sysemu.h"
  33 #include "qemu/main-loop.h"
  34 #include "trace.h"
  35 #include "qemu/sockets.h"
  36
  37 /* this must come after including "trace.h" */
  38 #include <shlobj.h>
  39
  40 void *qemu_oom_check(void *ptr)
  41 {
  42     if (ptr == NULL) {
  43         fprintf(stderr, "Failed to allocate memory: %lu\n", GetLastError());
  44         abort();
  45     }
  46     return ptr;
  47 }
  48
  49 void *qemu_memalign(size_t alignment, size_t size)
  50 {
  51     void *ptr;
  52
  53     if (!size) {
  54         abort();
  55     }
  56     ptr = qemu_oom_check(VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE));
  57     trace_qemu_memalign(alignment, size, ptr);
  58     return ptr;
  59 }
  60
  61 void *qemu_anon_ram_alloc(size_t size)
  62 {
  63     void *ptr;
  64
  65     /* FIXME: this is not exactly optimal solution since VirtualAlloc
  66        has 64Kb granularity, but at least it guarantees us that the
  67        memory is page aligned. */
  68     ptr = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
  69     trace_qemu_anon_ram_alloc(size, ptr);
  70     return ptr;
  71 }
  72
  73 void qemu_vfree(void *ptr)
  74 {
  75     trace_qemu_vfree(ptr);
  76     if (ptr) {
  77         VirtualFree(ptr, 0, MEM_RELEASE);
  78     }
  79 }
  80
  81 void qemu_anon_ram_free(void *ptr, size_t size)
  82 {
  83     trace_qemu_anon_ram_free(ptr, size);
  84     if (ptr) {
  85         VirtualFree(ptr, 0, MEM_RELEASE);
  86     }
  87 }
  88
  89 /* FIXME: add proper locking */
  90 struct tm *gmtime_r(const time_t *timep, struct tm *result)
  91 {
  92     struct tm *p = gmtime(timep);
  93     memset(result, 0, sizeof(*result));
  94     if (p) {
  95         *result = *p;
  96         p = result;
  97     }
  98     return p;
  99 }
 100
 101 /* FIXME: add proper locking */
 102 struct tm *localtime_r(const time_t *timep, struct tm *result)
 103 {
 104     struct tm *p = localtime(timep);
 105     memset(result, 0, sizeof(*result));
 106     if (p) {
 107         *result = *p;
 108         p = result;
 109     }
 110     return p;
 111 }
 112
 113 void qemu_set_block(int fd)
 114 {
 115     unsigned long opt = 0;
 116     WSAEventSelect(fd, NULL, 0);
 117     ioctlsocket(fd, FIONBIO, &opt);
 118 }
 119
 120 void qemu_set_nonblock(int fd)
 121 {
 122     unsigned long opt = 1;
 123     ioctlsocket(fd, FIONBIO, &opt);
 124     qemu_fd_register(fd);
 125 }
 126
 127 int socket_set_fast_reuse(int fd)
 128 {
 129     /* Enabling the reuse of an endpoint that was used by a socket still in
 130      * TIME_WAIT state is usually performed by setting SO_REUSEADDR. On Windows
 131      * fast reuse is the default and SO_REUSEADDR does strange things. So we
 132      * don't have to do anything here. More info can be found at:
 133      * http://msdn.microsoft.com/en-us/library/windows/desktop/ms740621.aspx */
 134     return 0;
 135 }
 136
 137 int inet_aton(const char *cp, struct in_addr *ia)
 138 {
 139     uint32_t addr = inet_addr(cp);
 140     if (addr == 0xffffffff) {
 141         return 0;
 142     }
 143     ia->s_addr = addr;
 144     return 1;
 145 }
 146
 147 void qemu_set_cloexec(int fd)
 148 {
 149 }
 150
 151 /* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
 152 #define _W32_FT_OFFSET (116444736000000000ULL)
 153
 154 int qemu_gettimeofday(qemu_timeval *tp)
 155 {
 156   union {
 157     unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
 158     FILETIME ft;
 159   }  _now;
 160
 161   if(tp) {
 162       GetSystemTimeAsFileTime (&_now.ft);
 163       tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
 164       tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
 165   }
 166   /* Always return 0 as per Open Group Base Specifications Issue 6.
 167      Do not set errno on error.  */
 168   return 0;
 169 }
 170
 171 int qemu_get_thread_id(void)
 172 {
 173     return GetCurrentThreadId();
 174 }
 175
 176 char *
 177 qemu_get_local_state_pathname(const char *relative_pathname)
 178 {
 179     HRESULT result;
 180     char base_path[MAX_PATH+1] = "";
 181
 182     result = SHGetFolderPath(NULL, CSIDL_COMMON_APPDATA, NULL,
 183                              /* SHGFP_TYPE_CURRENT */ 0, base_path);
 184     if (result != S_OK) {
 185         /* misconfigured environment */
 186         g_critical("CSIDL_COMMON_APPDATA unavailable: %ld", (long)result);
 187         abort();
 188     }
 189     return g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s", base_path,
 190                            relative_pathname);
 191 }
 192
 193 void qemu_set_tty_echo(int fd, bool echo)
 194 {
 195     HANDLE handle = (HANDLE)_get_osfhandle(fd);
 196     DWORD dwMode = 0;
 197
 198     if (handle == INVALID_HANDLE_VALUE) {
 199         return;
 200     }
 201
 202     GetConsoleMode(handle, &dwMode);
 203
 204     if (echo) {
 205         SetConsoleMode(handle, dwMode | ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT);
 206     } else {
 207         SetConsoleMode(handle,
 208                        dwMode & ~(ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT));
 209     }
 210 }
 211
 212 static char exec_dir[PATH_MAX];
 213
 214 void qemu_init_exec_dir(const char *argv0)
 215 {
 216
 217     char *p;
 218     char buf[MAX_PATH];
 219     DWORD len;
 220
 221     len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
 222     if (len == 0) {
 223         return;
 224     }
 225
 226     buf[len] = 0;
 227     p = buf + len - 1;
 228     while (p != buf && *p != '\\') {
 229         p--;
 230     }
 231     *p = 0;
 232     if (access(buf, R_OK) == 0) {
 233         pstrcpy(exec_dir, sizeof(exec_dir), buf);
 234     }
 235 }
 236
 237 char *qemu_get_exec_dir(void)
 238 {
 239     return g_strdup(exec_dir);
 240 }