File:  [Qemu by Fabrice Bellard] / qemu / os-win32.c
Revision 1.1.1.5 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 19:34:43 2018 UTC (23 months, 2 weeks ago) by root
Branches: qemu, MAIN
CVS tags: qemu1101, HEAD
qemu 1.1.1

    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:     qemu_system_shutdown_request();
   61:     /* Windows 7 kills application when the function returns.
   62:        Sleep here to give QEMU a try for closing.
   63:        Sleep period is 10000ms because Windows kills the program
   64:        after 10 seconds anyway. */
   65:     Sleep(10000);
   66: 
   67:     return TRUE;
   68: }
   69: 
   70: void os_setup_early_signal_handling(void)
   71: {
   72:     /* Note: cpu_interrupt() is currently not SMP safe, so we force
   73:        QEMU to run on a single CPU */
   74:     HANDLE h;
   75:     DWORD_PTR mask, smask;
   76:     int i;
   77: 
   78:     SetConsoleCtrlHandler(qemu_ctrl_handler, TRUE);
   79: 
   80:     h = GetCurrentProcess();
   81:     if (GetProcessAffinityMask(h, &mask, &smask)) {
   82:         for(i = 0; i < 32; i++) {
   83:             if (mask & (1 << i))
   84:                 break;
   85:         }
   86:         if (i != 32) {
   87:             mask = 1 << i;
   88:             SetProcessAffinityMask(h, mask);
   89:         }
   90:     }
   91: }
   92: 
   93: /* Look for support files in the same directory as the executable.  */
   94: char *os_find_datadir(const char *argv0)
   95: {
   96:     char *p;
   97:     char buf[MAX_PATH];
   98:     DWORD len;
   99: 
  100:     len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
  101:     if (len == 0) {
  102:         return NULL;
  103:     }
  104: 
  105:     buf[len] = 0;
  106:     p = buf + len - 1;
  107:     while (p != buf && *p != '\\')
  108:         p--;
  109:     *p = 0;
  110:     if (access(buf, R_OK) == 0) {
  111:         return g_strdup(buf);
  112:     }
  113:     return NULL;
  114: }
  115: 
  116: void os_set_line_buffering(void)
  117: {
  118:     setbuf(stdout, NULL);
  119:     setbuf(stderr, NULL);
  120: }
  121: 
  122: /*
  123:  * Parse OS specific command line options.
  124:  * return 0 if option handled, -1 otherwise
  125:  */
  126: void os_parse_cmd_args(int index, const char *optarg)
  127: {
  128:     return;
  129: }
  130: 
  131: void os_pidfile_error(void)
  132: {
  133:     fprintf(stderr, "Could not acquire pid file: %s\n", strerror(errno));
  134: }
  135: 
  136: int qemu_create_pidfile(const char *filename)
  137: {
  138:     char buffer[128];
  139:     int len;
  140:     HANDLE file;
  141:     OVERLAPPED overlap;
  142:     BOOL ret;
  143:     memset(&overlap, 0, sizeof(overlap));
  144: 
  145:     file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL,
  146:                       OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
  147: 
  148:     if (file == INVALID_HANDLE_VALUE) {
  149:         return -1;
  150:     }
  151:     len = snprintf(buffer, sizeof(buffer), "%d\n", getpid());
  152:     ret = WriteFile(file, (LPCVOID)buffer, (DWORD)len,
  153:                     NULL, &overlap);
  154:     CloseHandle(file);
  155:     if (ret == 0) {
  156:         return -1;
  157:     }
  158:     return 0;
  159: }

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