Archipelago » qemu

/*

 * os-win32.c

 *

 * Copyright (c) 2003-2008 Fabrice Bellard

 * Copyright (c) 2010 Red Hat, Inc.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

#include <windows.h>

#include <mmsystem.h>

#include <unistd.h>

#include <fcntl.h>

#include <signal.h>

#include <time.h>

#include <errno.h>

#include <sys/time.h>

#include "config-host.h"

#include "sysemu/sysemu.h"

#include "qemu-options.h"

/***********************************************************/

/* Functions missing in mingw */

int setenv(const char *name, const char *value, int overwrite)

{

    int result = 0;

    if (overwrite || !getenv(name)) {

        size_t length = strlen(name) + strlen(value) + 2;

        char *string = g_malloc(length);

        snprintf(string, length, "%s=%s", name, value);

        result = putenv(string);

        /* Windows takes a copy and does not continue to use our string.

         * Therefore it can be safely freed on this platform.  POSIX code

         * typically has to leak the string because according to the spec it

         * becomes part of the environment.

         */

        g_free(string);

    }

    return result;

}

static BOOL WINAPI qemu_ctrl_handler(DWORD type)

{

    qemu_system_shutdown_request();

    /* Windows 7 kills application when the function returns.

       Sleep here to give QEMU a try for closing.

       Sleep period is 10000ms because Windows kills the program

       after 10 seconds anyway. */

    Sleep(10000);

    return TRUE;

}

static TIMECAPS mm_tc;

static void os_undo_timer_resolution(void)

{

    timeEndPeriod(mm_tc.wPeriodMin);

}

void os_setup_early_signal_handling(void)

{

    SetConsoleCtrlHandler(qemu_ctrl_handler, TRUE);

    timeGetDevCaps(&mm_tc, sizeof(mm_tc));

    timeBeginPeriod(mm_tc.wPeriodMin);

    atexit(os_undo_timer_resolution);

}

/* Look for support files in the same directory as the executable.  */

char *os_find_datadir(const char *argv0)

{

    char *p;

    char buf[MAX_PATH];

    DWORD len;

    len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);

    if (len == 0) {

        return NULL;

    }

    buf[len] = 0;

    p = buf + len - 1;

    while (p != buf && *p != '\\')

        p--;

    *p = 0;

    if (access(buf, R_OK) == 0) {

        return g_strdup(buf);

    }

    return NULL;

}

void os_set_line_buffering(void)

{

    setbuf(stdout, NULL);

    setbuf(stderr, NULL);

}

/*

 * Parse OS specific command line options.

 * return 0 if option handled, -1 otherwise

 */

void os_parse_cmd_args(int index, const char *optarg)

{

    return;

}

void os_pidfile_error(void)

{

    fprintf(stderr, "Could not acquire pid file: %s\n", strerror(errno));

}

int qemu_create_pidfile(const char *filename)

{

    char buffer[128];

    int len;

    HANDLE file;

    OVERLAPPED overlap;

    BOOL ret;

    memset(&overlap, 0, sizeof(overlap));

    file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL,

                      OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);

    if (file == INVALID_HANDLE_VALUE) {

        return -1;

    }

    len = snprintf(buffer, sizeof(buffer), "%d\n", getpid());

    ret = WriteFile(file, (LPCVOID)buffer, (DWORD)len,

                    NULL, &overlap);

    CloseHandle(file);

    if (ret == 0) {

        return -1;

    }

    return 0;

}