File:  [Qemu by Fabrice Bellard] / qemu / os-win32.c
Revision 1.1.1.4 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 19:17:28 2018 UTC (19 months, 2 weeks ago) by root
Branches: qemu, MAIN
CVS tags: qemu1001, HEAD
qemu 1.0.1

    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:     return result;
   49: }
   50: 
   51: static BOOL WINAPI qemu_ctrl_handler(DWORD type)
   52: {
   53:     exit(STATUS_CONTROL_C_EXIT);
   54:     return TRUE;
   55: }
   56: 
   57: void os_setup_early_signal_handling(void)
   58: {
   59:     /* Note: cpu_interrupt() is currently not SMP safe, so we force
   60:        QEMU to run on a single CPU */
   61:     HANDLE h;
   62:     DWORD_PTR mask, smask;
   63:     int i;
   64: 
   65:     SetConsoleCtrlHandler(qemu_ctrl_handler, TRUE);
   66: 
   67:     h = GetCurrentProcess();
   68:     if (GetProcessAffinityMask(h, &mask, &smask)) {
   69:         for(i = 0; i < 32; i++) {
   70:             if (mask & (1 << i))
   71:                 break;
   72:         }
   73:         if (i != 32) {
   74:             mask = 1 << i;
   75:             SetProcessAffinityMask(h, mask);
   76:         }
   77:     }
   78: }
   79: 
   80: /* Look for support files in the same directory as the executable.  */
   81: char *os_find_datadir(const char *argv0)
   82: {
   83:     char *p;
   84:     char buf[MAX_PATH];
   85:     DWORD len;
   86: 
   87:     len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
   88:     if (len == 0) {
   89:         return NULL;
   90:     }
   91: 
   92:     buf[len] = 0;
   93:     p = buf + len - 1;
   94:     while (p != buf && *p != '\\')
   95:         p--;
   96:     *p = 0;
   97:     if (access(buf, R_OK) == 0) {
   98:         return g_strdup(buf);
   99:     }
  100:     return NULL;
  101: }
  102: 
  103: void os_set_line_buffering(void)
  104: {
  105:     setbuf(stdout, NULL);
  106:     setbuf(stderr, NULL);
  107: }
  108: 
  109: /*
  110:  * Parse OS specific command line options.
  111:  * return 0 if option handled, -1 otherwise
  112:  */
  113: void os_parse_cmd_args(int index, const char *optarg)
  114: {
  115:     return;
  116: }
  117: 
  118: void os_pidfile_error(void)
  119: {
  120:     fprintf(stderr, "Could not acquire pid file: %s\n", strerror(errno));
  121: }
  122: 
  123: int qemu_create_pidfile(const char *filename)
  124: {
  125:     char buffer[128];
  126:     int len;
  127:     HANDLE file;
  128:     OVERLAPPED overlap;
  129:     BOOL ret;
  130:     memset(&overlap, 0, sizeof(overlap));
  131: 
  132:     file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL,
  133:                       OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
  134: 
  135:     if (file == INVALID_HANDLE_VALUE) {
  136:         return -1;
  137:     }
  138:     len = snprintf(buffer, sizeof(buffer), "%d\n", getpid());
  139:     ret = WriteFile(file, (LPCVOID)buffer, (DWORD)len,
  140:                     NULL, &overlap);
  141:     CloseHandle(file);
  142:     if (ret == 0) {
  143:         return -1;
  144:     }
  145:     return 0;
  146: }
  147: 
  148: int qemu_get_thread_id(void)
  149: {
  150:     return GetCurrentThreadId();
  151: }

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