util/oslib-win32.c - third_party/qemu - Git at Google

 /*
  * os-win32.c
  *
  * Copyright (c) 2003-2008 Fabrice Bellard
  * Copyright (c) 2010-2016 Red Hat, Inc.
  *
  * QEMU library functions for win32 which are shared between QEMU and
  * the QEMU tools.
  *
  * 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.
  *
  * The implementation of g_poll (functions poll_rest, g_poll) at the end of
  * this file are based on code from GNOME glib-2 and use a different license,
  * see the license comment there.
  */

 #include "qemu/osdep.h"
 #include <windows.h>
 #include "qemu-common.h"
 #include "qapi/error.h"
 #include "qemu/main-loop.h"
 #include "trace.h"
 #include "qemu/sockets.h"
 #include "qemu/cutils.h"
 #include "qemu/error-report.h"
 #include <malloc.h>

 /* this must come after including "trace.h" */
 #include <shlobj.h>

 static int get_allocation_granularity(void)
 {
     SYSTEM_INFO system_info;

     GetSystemInfo(&system_info);
     return system_info.dwAllocationGranularity;
 }

 void *qemu_anon_ram_alloc(size_t size, uint64_t *align, bool shared,
                           bool noreserve)
 {
     void *ptr;

     if (noreserve) {
         /*
          * We need a MEM_COMMIT before accessing any memory in a MEM_RESERVE
          * area; we cannot easily mimic POSIX MAP_NORESERVE semantics.
          */
         error_report("Skipping reservation of swap space is not supported.");
         return NULL;
     }

     ptr = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
     trace_qemu_anon_ram_alloc(size, ptr);

     if (ptr && align) {
         *align = MAX(get_allocation_granularity(), getpagesize());
     }
     return ptr;
 }

 void qemu_anon_ram_free(void *ptr, size_t size)
 {
     trace_qemu_anon_ram_free(ptr, size);
     if (ptr) {
         VirtualFree(ptr, 0, MEM_RELEASE);
     }
 }

 #ifndef _POSIX_THREAD_SAFE_FUNCTIONS
 /* FIXME: add proper locking */
 struct tm *gmtime_r(const time_t *timep, struct tm *result)
 {
     struct tm *p = gmtime(timep);
     memset(result, 0, sizeof(*result));
     if (p) {
         *result = *p;
         p = result;
     }
     return p;
 }

 /* FIXME: add proper locking */
 struct tm *localtime_r(const time_t *timep, struct tm *result)
 {
     struct tm *p = localtime(timep);
     memset(result, 0, sizeof(*result));
     if (p) {
         *result = *p;
         p = result;
     }
     return p;
 }
 #endif /* _POSIX_THREAD_SAFE_FUNCTIONS */

 static int socket_error(void)
 {
     switch (WSAGetLastError()) {
     case 0:
         return 0;
     case WSAEINTR:
         return EINTR;
     case WSAEINVAL:
         return EINVAL;
     case WSA_INVALID_HANDLE:
         return EBADF;
     case WSA_NOT_ENOUGH_MEMORY:
         return ENOMEM;
     case WSA_INVALID_PARAMETER:
         return EINVAL;
     case WSAENAMETOOLONG:
         return ENAMETOOLONG;
     case WSAENOTEMPTY:
         return ENOTEMPTY;
     case WSAEWOULDBLOCK:
          /* not using EWOULDBLOCK as we don't want code to have
           * to check both EWOULDBLOCK and EAGAIN */
         return EAGAIN;
     case WSAEINPROGRESS:
         return EINPROGRESS;
     case WSAEALREADY:
         return EALREADY;
     case WSAENOTSOCK:
         return ENOTSOCK;
     case WSAEDESTADDRREQ:
         return EDESTADDRREQ;
     case WSAEMSGSIZE:
         return EMSGSIZE;
     case WSAEPROTOTYPE:
         return EPROTOTYPE;
     case WSAENOPROTOOPT:
         return ENOPROTOOPT;
     case WSAEPROTONOSUPPORT:
         return EPROTONOSUPPORT;
     case WSAEOPNOTSUPP:
         return EOPNOTSUPP;
     case WSAEAFNOSUPPORT:
         return EAFNOSUPPORT;
     case WSAEADDRINUSE:
         return EADDRINUSE;
     case WSAEADDRNOTAVAIL:
         return EADDRNOTAVAIL;
     case WSAENETDOWN:
         return ENETDOWN;
     case WSAENETUNREACH:
         return ENETUNREACH;
     case WSAENETRESET:
         return ENETRESET;
     case WSAECONNABORTED:
         return ECONNABORTED;
     case WSAECONNRESET:
         return ECONNRESET;
     case WSAENOBUFS:
         return ENOBUFS;
     case WSAEISCONN:
         return EISCONN;
     case WSAENOTCONN:
         return ENOTCONN;
     case WSAETIMEDOUT:
         return ETIMEDOUT;
     case WSAECONNREFUSED:
         return ECONNREFUSED;
     case WSAELOOP:
         return ELOOP;
     case WSAEHOSTUNREACH:
         return EHOSTUNREACH;
     default:
         return EIO;
     }
 }

 void qemu_set_block(int fd)
 {
     unsigned long opt = 0;
     WSAEventSelect(fd, NULL, 0);
     ioctlsocket(fd, FIONBIO, &opt);
 }

 int qemu_try_set_nonblock(int fd)
 {
     unsigned long opt = 1;
     if (ioctlsocket(fd, FIONBIO, &opt) != NO_ERROR) {
         return -socket_error();
     }
     return 0;
 }

 void qemu_set_nonblock(int fd)
 {
     (void)qemu_try_set_nonblock(fd);
 }

 int socket_set_fast_reuse(int fd)
 {
     /* Enabling the reuse of an endpoint that was used by a socket still in
      * TIME_WAIT state is usually performed by setting SO_REUSEADDR. On Windows
      * fast reuse is the default and SO_REUSEADDR does strange things. So we
      * don't have to do anything here. More info can be found at:
      * http://msdn.microsoft.com/en-us/library/windows/desktop/ms740621.aspx */
     return 0;
 }

 int inet_aton(const char *cp, struct in_addr *ia)
 {
     uint32_t addr = inet_addr(cp);
     if (addr == 0xffffffff) {
         return 0;
     }
     ia->s_addr = addr;
     return 1;
 }

 void qemu_set_cloexec(int fd)
 {
 }

 /* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
 #define _W32_FT_OFFSET (116444736000000000ULL)

 int qemu_gettimeofday(qemu_timeval *tp)
 {
   union {
     unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
     FILETIME ft;
   }  _now;

   if(tp) {
       GetSystemTimeAsFileTime (&_now.ft);
       tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
       tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
   }
   /* Always return 0 as per Open Group Base Specifications Issue 6.
      Do not set errno on error.  */
   return 0;
 }

 int qemu_get_thread_id(void)
 {
     return GetCurrentThreadId();
 }

 char *
 qemu_get_local_state_pathname(const char *relative_pathname)
 {
     HRESULT result;
     char base_path[MAX_PATH+1] = "";

     result = SHGetFolderPath(NULL, CSIDL_COMMON_APPDATA, NULL,
                              /* SHGFP_TYPE_CURRENT */ 0, base_path);
     if (result != S_OK) {
         /* misconfigured environment */
         g_critical("CSIDL_COMMON_APPDATA unavailable: %ld", (long)result);
         abort();
     }
     return g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s", base_path,
                            relative_pathname);
 }

 void qemu_set_tty_echo(int fd, bool echo)
 {
     HANDLE handle = (HANDLE)_get_osfhandle(fd);
     DWORD dwMode = 0;

     if (handle == INVALID_HANDLE_VALUE) {
         return;
     }

     GetConsoleMode(handle, &dwMode);

     if (echo) {
         SetConsoleMode(handle, dwMode | ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT);
     } else {
         SetConsoleMode(handle,
                        dwMode & ~(ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT));
     }
 }

 static const char *exec_dir;

 void qemu_init_exec_dir(const char *argv0)
 {

     char *p;
     char buf[MAX_PATH];
     DWORD len;

     if (exec_dir) {
         return;
     }

     len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
     if (len == 0) {
         return;
     }

     buf[len] = 0;
     p = buf + len - 1;
     while (p != buf && *p != '\\') {
         p--;
     }
     *p = 0;
     if (access(buf, R_OK) == 0) {
         exec_dir = g_strdup(buf);
     } else {
         exec_dir = CONFIG_BINDIR;
     }
 }

 const char *qemu_get_exec_dir(void)
 {
     return exec_dir;
 }

 int getpagesize(void)
 {
     SYSTEM_INFO system_info;

     GetSystemInfo(&system_info);
     return system_info.dwPageSize;
 }

 void os_mem_prealloc(int fd, char *area, size_t memory, int smp_cpus,
                      Error **errp)
 {
     int i;
     size_t pagesize = qemu_real_host_page_size;

     memory = (memory + pagesize - 1) & -pagesize;
     for (i = 0; i < memory / pagesize; i++) {
         memset(area + pagesize * i, 0, 1);
     }
 }

 char *qemu_get_pid_name(pid_t pid)
 {
     /* XXX Implement me */
     abort();
 }


 pid_t qemu_fork(Error **errp)
 {
     errno = ENOSYS;
     error_setg_errno(errp, errno,
                      "cannot fork child process");
     return -1;
 }


 #undef connect
 int qemu_connect_wrap(int sockfd, const struct sockaddr *addr,
                       socklen_t addrlen)
 {
     int ret;
     ret = connect(sockfd, addr, addrlen);
     if (ret < 0) {
         if (WSAGetLastError() == WSAEWOULDBLOCK) {
             errno = EINPROGRESS;
         } else {
             errno = socket_error();
         }
     }
     return ret;
 }


 #undef listen
 int qemu_listen_wrap(int sockfd, int backlog)
 {
     int ret;
     ret = listen(sockfd, backlog);
     if (ret < 0) {
         errno = socket_error();
     }
     return ret;
 }


 #undef bind
 int qemu_bind_wrap(int sockfd, const struct sockaddr *addr,
                    socklen_t addrlen)
 {
     int ret;
     ret = bind(sockfd, addr, addrlen);
     if (ret < 0) {
         errno = socket_error();
     }
     return ret;
 }


 #undef socket
 int qemu_socket_wrap(int domain, int type, int protocol)
 {
     int ret;
     ret = socket(domain, type, protocol);
     if (ret < 0) {
         errno = socket_error();
     }
     return ret;
 }


 #undef accept
 int qemu_accept_wrap(int sockfd, struct sockaddr *addr,
                      socklen_t *addrlen)
 {
     int ret;
     ret = accept(sockfd, addr, addrlen);
     if (ret < 0) {
         errno = socket_error();
     }
     return ret;
 }


 #undef shutdown
 int qemu_shutdown_wrap(int sockfd, int how)
 {
     int ret;
     ret = shutdown(sockfd, how);
     if (ret < 0) {
         errno = socket_error();
     }
     return ret;
 }


 #undef ioctlsocket
 int qemu_ioctlsocket_wrap(int fd, int req, void *val)
 {
     int ret;
     ret = ioctlsocket(fd, req, val);
     if (ret < 0) {
         errno = socket_error();
     }
     return ret;
 }


 #undef closesocket
 int qemu_closesocket_wrap(int fd)
 {
     int ret;
     ret = closesocket(fd);
     if (ret < 0) {
         errno = socket_error();
     }
     return ret;
 }


 #undef getsockopt
 int qemu_getsockopt_wrap(int sockfd, int level, int optname,
                          void *optval, socklen_t *optlen)
 {
     int ret;
     ret = getsockopt(sockfd, level, optname, optval, optlen);
     if (ret < 0) {
         errno = socket_error();
     }
     return ret;
 }


 #undef setsockopt
 int qemu_setsockopt_wrap(int sockfd, int level, int optname,
                          const void *optval, socklen_t optlen)
 {
     int ret;
     ret = setsockopt(sockfd, level, optname, optval, optlen);
     if (ret < 0) {
         errno = socket_error();
     }
     return ret;
 }


 #undef getpeername
 int qemu_getpeername_wrap(int sockfd, struct sockaddr *addr,
                           socklen_t *addrlen)
 {
     int ret;
     ret = getpeername(sockfd, addr, addrlen);
     if (ret < 0) {
         errno = socket_error();
     }
     return ret;
 }


 #undef getsockname
 int qemu_getsockname_wrap(int sockfd, struct sockaddr *addr,
                           socklen_t *addrlen)
 {
     int ret;
     ret = getsockname(sockfd, addr, addrlen);
     if (ret < 0) {
         errno = socket_error();
     }
     return ret;
 }


 #undef send
 ssize_t qemu_send_wrap(int sockfd, const void *buf, size_t len, int flags)
 {
     int ret;
     ret = send(sockfd, buf, len, flags);
     if (ret < 0) {
         errno = socket_error();
     }
     return ret;
 }


 #undef sendto
 ssize_t qemu_sendto_wrap(int sockfd, const void *buf, size_t len, int flags,
                          const struct sockaddr *addr, socklen_t addrlen)
 {
     int ret;
     ret = sendto(sockfd, buf, len, flags, addr, addrlen);
     if (ret < 0) {
         errno = socket_error();
     }
     return ret;
 }


 #undef recv
 ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags)
 {
     int ret;
     ret = recv(sockfd, buf, len, flags);
     if (ret < 0) {
         errno = socket_error();
     }
     return ret;
 }


 #undef recvfrom
 ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
                            struct sockaddr *addr, socklen_t *addrlen)
 {
     int ret;
     ret = recvfrom(sockfd, buf, len, flags, addr, addrlen);
     if (ret < 0) {
         errno = socket_error();
     }
     return ret;
 }

 bool qemu_write_pidfile(const char *filename, Error **errp)
 {
     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) {
         error_setg(errp, "Failed to create PID file");
         return false;
     }
     len = snprintf(buffer, sizeof(buffer), FMT_pid "\n", (pid_t)getpid());
     ret = WriteFile(file, (LPCVOID)buffer, (DWORD)len,
                     NULL, &overlap);
     CloseHandle(file);
     if (ret == 0) {
         error_setg(errp, "Failed to write PID file");
         return false;
     }
     return true;
 }

 char *qemu_get_host_name(Error **errp)
 {
     wchar_t tmp[MAX_COMPUTERNAME_LENGTH + 1];
     DWORD size = G_N_ELEMENTS(tmp);

     if (GetComputerNameW(tmp, &size) == 0) {
         error_setg_win32(errp, GetLastError(), "failed close handle");
         return NULL;
     }

     return g_utf16_to_utf8(tmp, size, NULL, NULL, NULL);
 }

 size_t qemu_get_host_physmem(void)
 {
     MEMORYSTATUSEX statex;
     statex.dwLength = sizeof(statex);

     if (GlobalMemoryStatusEx(&statex)) {
         return statex.ullTotalPhys;
     }
     return 0;
 }
	/*
	* os-win32.c
	*
	* Copyright (c) 2003-2008 Fabrice Bellard
	* Copyright (c) 2010-2016 Red Hat, Inc.
	*
	* QEMU library functions for win32 which are shared between QEMU and
	* the QEMU tools.
	*
	* 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.
	*
	* The implementation of g_poll (functions poll_rest, g_poll) at the end of
	* this file are based on code from GNOME glib-2 and use a different license,
	* see the license comment there.
	*/

	#include "qemu/osdep.h"
	#include <windows.h>
	#include "qemu-common.h"
	#include "qapi/error.h"
	#include "qemu/main-loop.h"
	#include "trace.h"
	#include "qemu/sockets.h"
	#include "qemu/cutils.h"
	#include "qemu/error-report.h"
	#include <malloc.h>

	/* this must come after including "trace.h" */
	#include <shlobj.h>

	static int get_allocation_granularity(void)
	{
	SYSTEM_INFO system_info;

	GetSystemInfo(&system_info);
	return system_info.dwAllocationGranularity;
	}

	void qemu_anon_ram_alloc(size_t size, uint64_t align, bool shared,
	bool noreserve)
	{
	void *ptr;

	if (noreserve) {
	/*
	* We need a MEM_COMMIT before accessing any memory in a MEM_RESERVE
	* area; we cannot easily mimic POSIX MAP_NORESERVE semantics.
	*/
	error_report("Skipping reservation of swap space is not supported.");
	return NULL;
	}

	ptr = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
	trace_qemu_anon_ram_alloc(size, ptr);

	if (ptr && align) {
	*align = MAX(get_allocation_granularity(), getpagesize());
	}
	return ptr;
	}

	void qemu_anon_ram_free(void *ptr, size_t size)
	{
	trace_qemu_anon_ram_free(ptr, size);
	if (ptr) {
	VirtualFree(ptr, 0, MEM_RELEASE);
	}
	}

	#ifndef _POSIX_THREAD_SAFE_FUNCTIONS
	/* FIXME: add proper locking */
	struct tm gmtime_r(const time_t timep, struct tm *result)
	{
	struct tm *p = gmtime(timep);
	memset(result, 0, sizeof(*result));
	if (p) {
	result = p;
	p = result;
	}
	return p;
	}

	/* FIXME: add proper locking */
	struct tm localtime_r(const time_t timep, struct tm *result)
	{
	struct tm *p = localtime(timep);
	memset(result, 0, sizeof(*result));
	if (p) {
	result = p;
	p = result;
	}
	return p;
	}
	#endif /* _POSIX_THREAD_SAFE_FUNCTIONS */

	static int socket_error(void)
	{
	switch (WSAGetLastError()) {
	case 0:
	return 0;
	case WSAEINTR:
	return EINTR;
	case WSAEINVAL:
	return EINVAL;
	case WSA_INVALID_HANDLE:
	return EBADF;
	case WSA_NOT_ENOUGH_MEMORY:
	return ENOMEM;
	case WSA_INVALID_PARAMETER:
	return EINVAL;
	case WSAENAMETOOLONG:
	return ENAMETOOLONG;
	case WSAENOTEMPTY:
	return ENOTEMPTY;
	case WSAEWOULDBLOCK:
	/* not using EWOULDBLOCK as we don't want code to have
	* to check both EWOULDBLOCK and EAGAIN */
	return EAGAIN;
	case WSAEINPROGRESS:
	return EINPROGRESS;
	case WSAEALREADY:
	return EALREADY;
	case WSAENOTSOCK:
	return ENOTSOCK;
	case WSAEDESTADDRREQ:
	return EDESTADDRREQ;
	case WSAEMSGSIZE:
	return EMSGSIZE;
	case WSAEPROTOTYPE:
	return EPROTOTYPE;
	case WSAENOPROTOOPT:
	return ENOPROTOOPT;
	case WSAEPROTONOSUPPORT:
	return EPROTONOSUPPORT;
	case WSAEOPNOTSUPP:
	return EOPNOTSUPP;
	case WSAEAFNOSUPPORT:
	return EAFNOSUPPORT;
	case WSAEADDRINUSE:
	return EADDRINUSE;
	case WSAEADDRNOTAVAIL:
	return EADDRNOTAVAIL;
	case WSAENETDOWN:
	return ENETDOWN;
	case WSAENETUNREACH:
	return ENETUNREACH;
	case WSAENETRESET:
	return ENETRESET;
	case WSAECONNABORTED:
	return ECONNABORTED;
	case WSAECONNRESET:
	return ECONNRESET;
	case WSAENOBUFS:
	return ENOBUFS;
	case WSAEISCONN:
	return EISCONN;
	case WSAENOTCONN:
	return ENOTCONN;
	case WSAETIMEDOUT:
	return ETIMEDOUT;
	case WSAECONNREFUSED:
	return ECONNREFUSED;
	case WSAELOOP:
	return ELOOP;
	case WSAEHOSTUNREACH:
	return EHOSTUNREACH;
	default:
	return EIO;
	}
	}

	void qemu_set_block(int fd)
	{
	unsigned long opt = 0;
	WSAEventSelect(fd, NULL, 0);
	ioctlsocket(fd, FIONBIO, &opt);
	}

	int qemu_try_set_nonblock(int fd)
	{
	unsigned long opt = 1;
	if (ioctlsocket(fd, FIONBIO, &opt) != NO_ERROR) {
	return -socket_error();
	}
	return 0;
	}

	void qemu_set_nonblock(int fd)
	{
	(void)qemu_try_set_nonblock(fd);
	}

	int socket_set_fast_reuse(int fd)
	{
	/* Enabling the reuse of an endpoint that was used by a socket still in
	* TIME_WAIT state is usually performed by setting SO_REUSEADDR. On Windows
	* fast reuse is the default and SO_REUSEADDR does strange things. So we
	* don't have to do anything here. More info can be found at:
	* http://msdn.microsoft.com/en-us/library/windows/desktop/ms740621.aspx */
	return 0;
	}

	int inet_aton(const char cp, struct in_addr ia)
	{
	uint32_t addr = inet_addr(cp);
	if (addr == 0xffffffff) {
	return 0;
	}
	ia->s_addr = addr;
	return 1;
	}

	void qemu_set_cloexec(int fd)
	{
	}

	/* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
	#define _W32_FT_OFFSET (116444736000000000ULL)

	int qemu_gettimeofday(qemu_timeval *tp)
	{
	union {
	unsigned long long ns100; /time since 1 Jan 1601 in 100ns units /
	FILETIME ft;
	} _now;

	if(tp) {
	GetSystemTimeAsFileTime (&_now.ft);
	tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
	tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
	}
	/* Always return 0 as per Open Group Base Specifications Issue 6.
	Do not set errno on error. */
	return 0;
	}

	int qemu_get_thread_id(void)
	{
	return GetCurrentThreadId();
	}

	char *
	qemu_get_local_state_pathname(const char *relative_pathname)
	{
	HRESULT result;
	char base_path[MAX_PATH+1] = "";

	result = SHGetFolderPath(NULL, CSIDL_COMMON_APPDATA, NULL,
	/* SHGFP_TYPE_CURRENT */ 0, base_path);
	if (result != S_OK) {
	/* misconfigured environment */
	g_critical("CSIDL_COMMON_APPDATA unavailable: %ld", (long)result);
	abort();
	}
	return g_strdup_printf("%s" G_DIR_SEPARATOR_S "%s", base_path,
	relative_pathname);
	}

	void qemu_set_tty_echo(int fd, bool echo)
	{
	HANDLE handle = (HANDLE)_get_osfhandle(fd);
	DWORD dwMode = 0;

	if (handle == INVALID_HANDLE_VALUE) {
	return;
	}

	GetConsoleMode(handle, &dwMode);

	if (echo) {
	SetConsoleMode(handle, dwMode \| ENABLE_ECHO_INPUT \| ENABLE_LINE_INPUT);
	} else {
	SetConsoleMode(handle,
	dwMode & ~(ENABLE_ECHO_INPUT \| ENABLE_LINE_INPUT));
	}
	}

	static const char *exec_dir;

	void qemu_init_exec_dir(const char *argv0)
	{

	char *p;
	char buf[MAX_PATH];
	DWORD len;

	if (exec_dir) {
	return;
	}

	len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
	if (len == 0) {
	return;
	}

	buf[len] = 0;
	p = buf + len - 1;
	while (p != buf && *p != '\\') {
	p--;
	}
	*p = 0;
	if (access(buf, R_OK) == 0) {
	exec_dir = g_strdup(buf);
	} else {
	exec_dir = CONFIG_BINDIR;
	}
	}

	const char *qemu_get_exec_dir(void)
	{
	return exec_dir;
	}

	int getpagesize(void)
	{
	SYSTEM_INFO system_info;

	GetSystemInfo(&system_info);
	return system_info.dwPageSize;
	}

	void os_mem_prealloc(int fd, char *area, size_t memory, int smp_cpus,
	Error **errp)
	{
	int i;
	size_t pagesize = qemu_real_host_page_size;

	memory = (memory + pagesize - 1) & -pagesize;
	for (i = 0; i < memory / pagesize; i++) {
	memset(area + pagesize * i, 0, 1);
	}
	}

	char *qemu_get_pid_name(pid_t pid)
	{
	/* XXX Implement me */
	abort();
	}


	pid_t qemu_fork(Error **errp)
	{
	errno = ENOSYS;
	error_setg_errno(errp, errno,
	"cannot fork child process");
	return -1;
	}


	#undef connect
	int qemu_connect_wrap(int sockfd, const struct sockaddr *addr,
	socklen_t addrlen)
	{
	int ret;
	ret = connect(sockfd, addr, addrlen);
	if (ret < 0) {
	if (WSAGetLastError() == WSAEWOULDBLOCK) {
	errno = EINPROGRESS;
	} else {
	errno = socket_error();
	}
	}
	return ret;
	}


	#undef listen
	int qemu_listen_wrap(int sockfd, int backlog)
	{
	int ret;
	ret = listen(sockfd, backlog);
	if (ret < 0) {
	errno = socket_error();
	}
	return ret;
	}


	#undef bind
	int qemu_bind_wrap(int sockfd, const struct sockaddr *addr,
	socklen_t addrlen)
	{
	int ret;
	ret = bind(sockfd, addr, addrlen);
	if (ret < 0) {
	errno = socket_error();
	}
	return ret;
	}


	#undef socket
	int qemu_socket_wrap(int domain, int type, int protocol)
	{
	int ret;
	ret = socket(domain, type, protocol);
	if (ret < 0) {
	errno = socket_error();
	}
	return ret;
	}


	#undef accept
	int qemu_accept_wrap(int sockfd, struct sockaddr *addr,
	socklen_t *addrlen)
	{
	int ret;
	ret = accept(sockfd, addr, addrlen);
	if (ret < 0) {
	errno = socket_error();
	}
	return ret;
	}


	#undef shutdown
	int qemu_shutdown_wrap(int sockfd, int how)
	{
	int ret;
	ret = shutdown(sockfd, how);
	if (ret < 0) {
	errno = socket_error();
	}
	return ret;
	}


	#undef ioctlsocket
	int qemu_ioctlsocket_wrap(int fd, int req, void *val)
	{
	int ret;
	ret = ioctlsocket(fd, req, val);
	if (ret < 0) {
	errno = socket_error();
	}
	return ret;
	}


	#undef closesocket
	int qemu_closesocket_wrap(int fd)
	{
	int ret;
	ret = closesocket(fd);
	if (ret < 0) {
	errno = socket_error();
	}
	return ret;
	}


	#undef getsockopt
	int qemu_getsockopt_wrap(int sockfd, int level, int optname,
	void optval, socklen_t optlen)
	{
	int ret;
	ret = getsockopt(sockfd, level, optname, optval, optlen);
	if (ret < 0) {
	errno = socket_error();
	}
	return ret;
	}


	#undef setsockopt
	int qemu_setsockopt_wrap(int sockfd, int level, int optname,
	const void *optval, socklen_t optlen)
	{
	int ret;
	ret = setsockopt(sockfd, level, optname, optval, optlen);
	if (ret < 0) {
	errno = socket_error();
	}
	return ret;
	}


	#undef getpeername
	int qemu_getpeername_wrap(int sockfd, struct sockaddr *addr,
	socklen_t *addrlen)
	{
	int ret;
	ret = getpeername(sockfd, addr, addrlen);
	if (ret < 0) {
	errno = socket_error();
	}
	return ret;
	}


	#undef getsockname
	int qemu_getsockname_wrap(int sockfd, struct sockaddr *addr,
	socklen_t *addrlen)
	{
	int ret;
	ret = getsockname(sockfd, addr, addrlen);
	if (ret < 0) {
	errno = socket_error();
	}
	return ret;
	}


	#undef send
	ssize_t qemu_send_wrap(int sockfd, const void *buf, size_t len, int flags)
	{
	int ret;
	ret = send(sockfd, buf, len, flags);
	if (ret < 0) {
	errno = socket_error();
	}
	return ret;
	}


	#undef sendto
	ssize_t qemu_sendto_wrap(int sockfd, const void *buf, size_t len, int flags,
	const struct sockaddr *addr, socklen_t addrlen)
	{
	int ret;
	ret = sendto(sockfd, buf, len, flags, addr, addrlen);
	if (ret < 0) {
	errno = socket_error();
	}
	return ret;
	}


	#undef recv
	ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags)
	{
	int ret;
	ret = recv(sockfd, buf, len, flags);
	if (ret < 0) {
	errno = socket_error();
	}
	return ret;
	}


	#undef recvfrom
	ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
	struct sockaddr addr, socklen_t addrlen)
	{
	int ret;
	ret = recvfrom(sockfd, buf, len, flags, addr, addrlen);
	if (ret < 0) {
	errno = socket_error();
	}
	return ret;
	}

	bool qemu_write_pidfile(const char filename, Error *errp)
	{
	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) {
	error_setg(errp, "Failed to create PID file");
	return false;
	}
	len = snprintf(buffer, sizeof(buffer), FMT_pid "\n", (pid_t)getpid());
	ret = WriteFile(file, (LPCVOID)buffer, (DWORD)len,
	NULL, &overlap);
	CloseHandle(file);
	if (ret == 0) {
	error_setg(errp, "Failed to write PID file");
	return false;
	}
	return true;
	}

	char qemu_get_host_name(Error *errp)
	{
	wchar_t tmp[MAX_COMPUTERNAME_LENGTH + 1];
	DWORD size = G_N_ELEMENTS(tmp);

	if (GetComputerNameW(tmp, &size) == 0) {
	error_setg_win32(errp, GetLastError(), "failed close handle");
	return NULL;
	}

	return g_utf16_to_utf8(tmp, size, NULL, NULL, NULL);
	}

	size_t qemu_get_host_physmem(void)
	{
	MEMORYSTATUSEX statex;
	statex.dwLength = sizeof(statex);

	if (GlobalMemoryStatusEx(&statex)) {
	return statex.ullTotalPhys;
	}
	return 0;
	}