qemu-patch-raspberry4/include/sysemu/os-win32.h
Yonggang Luo 7c3afc8570 win32: Simplify gmtime_r detection not depends on if _POSIX_C_SOURCE are defined on msys2/mingw
We remove the CONFIG_LOCALTIME_R detection option in configure, and move the check
existence of gmtime_r from configure into C header and source directly by using macro
`_POSIX_THREAD_SAFE_FUNCTIONS`.
Before this patch, the configure script are always assume the compiler doesn't define
_POSIX_C_SOURCE macro at all, but that's not true, because thirdparty library such
as ncursesw may define -D_POSIX_C_SOURCE in it's pkg-config file. And that C Flags will
added -D_POSIX_C_SOURCE into each QEMU_CFLAGS. And that's causing the following compiling error:
n file included from C:/work/xemu/qemu/include/qemu/osdep.h:119,
                 from ../softmmu/main.c:25:
C:/work/xemu/qemu/include/sysemu/os-win32.h:53:12: error: redundant redeclaration of 'gmtime_r' [-Werror=redundant-decls]
   53 | struct tm *gmtime_r(const time_t *timep, struct tm *result);
      |            ^~~~~~~~
In file included from C:/work/xemu/qemu/include/qemu/osdep.h:94,
                 from ../softmmu/main.c:25:
C:/CI-Tools/msys64/mingw64/x86_64-w64-mingw32/include/time.h:284:36: note: previous definition of 'gmtime_r' was here
  284 | __forceinline struct tm *__CRTDECL gmtime_r(const time_t *_Time, struct tm *_Tm) {
      |                                    ^~~~~~~~
In file included from C:/work/xemu/qemu/include/qemu/osdep.h:119,
                 from ../softmmu/main.c:25:
C:/work/xemu/qemu/include/sysemu/os-win32.h:55:12: error: redundant redeclaration of 'localtime_r' [-Werror=redundant-decls]
   55 | struct tm *localtime_r(const time_t *timep, struct tm *result);
      |            ^~~~~~~~~~~
In file included from C:/work/xemu/qemu/include/qemu/osdep.h:94,
                 from ../softmmu/main.c:25:
C:/CI-Tools/msys64/mingw64/x86_64-w64-mingw32/include/time.h:281:36: note: previous definition of 'localtime_r' was here
  281 | __forceinline struct tm *__CRTDECL localtime_r(const time_t *_Time, struct tm *_Tm) {
      |                                    ^~~~~~~~~~~
Compiling C object libcommon.fa.p/hw_gpio_zaurus.c.obj
In file included from C:/work/xemu/qemu/include/qemu/osdep.h:119,
                 from ../hw/i2c/smbus_slave.c:16:
C:/work/xemu/qemu/include/sysemu/os-win32.h:53:12: error: redundant redeclaration of 'gmtime_r' [-Werror=redundant-decls]
   53 | struct tm *gmtime_r(const time_t *timep, struct tm *result);
      |            ^~~~~~~~
In file included from C:/work/xemu/qemu/include/qemu/osdep.h:94,
                 from ../hw/i2c/smbus_slave.c:16:
C:/CI-Tools/msys64/mingw64/x86_64-w64-mingw32/include/time.h:284:36: note: previous definition of 'gmtime_r' was here
  284 | __forceinline struct tm *__CRTDECL gmtime_r(const time_t *_Time, struct tm *_Tm) {
      |                                    ^~~~~~~~
In file included from C:/work/xemu/qemu/include/qemu/osdep.h:119,
                 from ../hw/i2c/smbus_slave.c:16:
C:/work/xemu/qemu/include/sysemu/os-win32.h:55:12: error: redundant redeclaration of 'localtime_r' [-Werror=redundant-decls]
   55 | struct tm *localtime_r(const time_t *timep, struct tm *result);
      |            ^~~~~~~~~~~
In file included from C:/work/xemu/qemu/include/qemu/osdep.h:94,
                 from ../hw/i2c/smbus_slave.c:16:
C:/CI-Tools/msys64/mingw64/x86_64-w64-mingw32/include/time.h:281:36: note: previous definition of 'localtime_r' was here
  281 | __forceinline struct tm *__CRTDECL localtime_r(const time_t *_Time, struct tm *_Tm) {
      |                                    ^~~~~~~~~~~
Compiling C object libcommon.fa.p/hw_dma_xilinx_axidma.c.obj

After this patch, whenever ncursesw or other thirdparty libraries tried to define or not
define  _POSIX_C_SOURCE, the source will building properly. Because now, we don't make any
assumption if _POSIX_C_SOURCE are defined. We solely relied on if the macro `_POSIX_THREAD_SAFE_FUNCTIONS`
are defined in msys2/mingw header.

The _POSIX_THREAD_SAFE_FUNCTIONS are defined in mingw header like this:

```
#if defined(_POSIX_C_SOURCE) && !defined(_POSIX_THREAD_SAFE_FUNCTIONS)
#define _POSIX_THREAD_SAFE_FUNCTIONS 200112L
#endif

#ifdef _POSIX_THREAD_SAFE_FUNCTIONS
__forceinline struct tm *__CRTDECL localtime_r(const time_t *_Time, struct tm *_Tm) {
  return localtime_s(_Tm, _Time) ? NULL : _Tm;
}
__forceinline struct tm *__CRTDECL gmtime_r(const time_t *_Time, struct tm *_Tm) {
  return gmtime_s(_Tm, _Time) ? NULL : _Tm;
}
__forceinline char *__CRTDECL ctime_r(const time_t *_Time, char *_Str) {
  return ctime_s(_Str, 0x7fffffff, _Time) ? NULL : _Str;
}
__forceinline char *__CRTDECL asctime_r(const struct tm *_Tm, char * _Str) {
  return asctime_s(_Str, 0x7fffffff, _Tm) ? NULL : _Str;
}
#endif
```

Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-id: 20201012234348.1427-5-luoyonggang@gmail.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2020-10-14 06:05:56 +02:00

198 lines
6 KiB
C

/*
* win32 specific declarations
*
* Copyright (c) 2003-2008 Fabrice Bellard
* Copyright (c) 2010 Jes Sorensen <Jes.Sorensen@redhat.com>
*
* 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.
*/
#ifndef QEMU_OS_WIN32_H
#define QEMU_OS_WIN32_H
#include <winsock2.h>
#include <windows.h>
#include <ws2tcpip.h>
#if defined(_WIN64)
/* On w64, setjmp is implemented by _setjmp which needs a second parameter.
* If this parameter is NULL, longjump does no stack unwinding.
* That is what we need for QEMU. Passing the value of register rsp (default)
* lets longjmp try a stack unwinding which will crash with generated code. */
# undef setjmp
# define setjmp(env) _setjmp(env, NULL)
#endif
/* QEMU uses sigsetjmp()/siglongjmp() as the portable way to specify
* "longjmp and don't touch the signal masks". Since we know that the
* savemask parameter will always be zero we can safely define these
* in terms of setjmp/longjmp on Win32.
*/
#define sigjmp_buf jmp_buf
#define sigsetjmp(env, savemask) setjmp(env)
#define siglongjmp(env, val) longjmp(env, val)
/* Missing POSIX functions. Don't use MinGW-w64 macros. */
#ifndef _POSIX_THREAD_SAFE_FUNCTIONS
#undef gmtime_r
struct tm *gmtime_r(const time_t *timep, struct tm *result);
#undef localtime_r
struct tm *localtime_r(const time_t *timep, struct tm *result);
#endif /* _POSIX_THREAD_SAFE_FUNCTIONS */
static inline void os_setup_signal_handling(void) {}
static inline void os_daemonize(void) {}
static inline void os_setup_post(void) {}
void os_set_line_buffering(void);
static inline void os_set_proc_name(const char *dummy) {}
int getpagesize(void);
#if !defined(EPROTONOSUPPORT)
# define EPROTONOSUPPORT EINVAL
#endif
typedef struct {
long tv_sec;
long tv_usec;
} qemu_timeval;
int qemu_gettimeofday(qemu_timeval *tp);
static inline bool is_daemonized(void)
{
return false;
}
static inline int os_mlock(void)
{
return -ENOSYS;
}
#define fsync _commit
#if !defined(lseek)
# define lseek _lseeki64
#endif
int qemu_ftruncate64(int, int64_t);
#if !defined(ftruncate)
# define ftruncate qemu_ftruncate64
#endif
static inline char *realpath(const char *path, char *resolved_path)
{
_fullpath(resolved_path, path, _MAX_PATH);
return resolved_path;
}
/* ??? Mingw appears to export _lock_file and _unlock_file as the functions
* with which to lock a stdio handle. But something is wrong in the markup,
* either in the header or the library, such that we get undefined references
* to "_imp___lock_file" etc when linking. Since we seem to have no other
* alternative, and the usage within the logging functions isn't critical,
* ignore FILE locking.
*/
static inline void qemu_flockfile(FILE *f)
{
}
static inline void qemu_funlockfile(FILE *f)
{
}
/* We wrap all the sockets functions so that we can
* set errno based on WSAGetLastError()
*/
#undef connect
#define connect qemu_connect_wrap
int qemu_connect_wrap(int sockfd, const struct sockaddr *addr,
socklen_t addrlen);
#undef listen
#define listen qemu_listen_wrap
int qemu_listen_wrap(int sockfd, int backlog);
#undef bind
#define bind qemu_bind_wrap
int qemu_bind_wrap(int sockfd, const struct sockaddr *addr,
socklen_t addrlen);
#undef socket
#define socket qemu_socket_wrap
int qemu_socket_wrap(int domain, int type, int protocol);
#undef accept
#define accept qemu_accept_wrap
int qemu_accept_wrap(int sockfd, struct sockaddr *addr,
socklen_t *addrlen);
#undef shutdown
#define shutdown qemu_shutdown_wrap
int qemu_shutdown_wrap(int sockfd, int how);
#undef ioctlsocket
#define ioctlsocket qemu_ioctlsocket_wrap
int qemu_ioctlsocket_wrap(int fd, int req, void *val);
#undef closesocket
#define closesocket qemu_closesocket_wrap
int qemu_closesocket_wrap(int fd);
#undef getsockopt
#define getsockopt qemu_getsockopt_wrap
int qemu_getsockopt_wrap(int sockfd, int level, int optname,
void *optval, socklen_t *optlen);
#undef setsockopt
#define setsockopt qemu_setsockopt_wrap
int qemu_setsockopt_wrap(int sockfd, int level, int optname,
const void *optval, socklen_t optlen);
#undef getpeername
#define getpeername qemu_getpeername_wrap
int qemu_getpeername_wrap(int sockfd, struct sockaddr *addr,
socklen_t *addrlen);
#undef getsockname
#define getsockname qemu_getsockname_wrap
int qemu_getsockname_wrap(int sockfd, struct sockaddr *addr,
socklen_t *addrlen);
#undef send
#define send qemu_send_wrap
ssize_t qemu_send_wrap(int sockfd, const void *buf, size_t len, int flags);
#undef sendto
#define sendto qemu_sendto_wrap
ssize_t qemu_sendto_wrap(int sockfd, const void *buf, size_t len, int flags,
const struct sockaddr *addr, socklen_t addrlen);
#undef recv
#define recv qemu_recv_wrap
ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags);
#undef recvfrom
#define recvfrom qemu_recvfrom_wrap
ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
struct sockaddr *addr, socklen_t *addrlen);
#endif