init

db_include/port/win32_port.h

@@ -0,0 +1,546 @@
+/*-------------------------------------------------------------------------
+ *
+ * win32_port.h
+ *	  Windows-specific compatibility stuff.
+ *
+ * Note this is read in MinGW as well as native Windows builds,
+ * but not in Cygwin builds.
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/port/win32_port.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef PG_WIN32_PORT_H
+#define PG_WIN32_PORT_H
+
+/*
+ * Always build with SSPI support. Keep it as a #define in case
+ * we want a switch to disable it sometime in the future.
+ */
+#define ENABLE_SSPI 1
+
+/* undefine and redefine after #include */
+#undef mkdir
+
+#undef ERROR
+
+/*
+ * VS2013 and later issue warnings about using the old Winsock API,
+ * which we don't really want to hear about.
+ */
+#ifdef _MSC_VER
+#define _WINSOCK_DEPRECATED_NO_WARNINGS
+#endif
+
+/*
+ * The MinGW64 headers choke if this is already defined - they
+ * define it themselves.
+ */
+#if !defined(__MINGW64_VERSION_MAJOR) || defined(_MSC_VER)
+#define _WINSOCKAPI_
+#endif
+
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#include <windows.h>
+#undef small
+#include <process.h>
+#include <signal.h>
+#include <direct.h>
+#undef near
+
+/* needed before sys/stat hacking below: */
+#define fstat microsoft_native_fstat
+#define stat microsoft_native_stat
+#include <sys/stat.h>
+#undef fstat
+#undef stat
+
+/* Must be here to avoid conflicting with prototype in windows.h */
+#define mkdir(a,b)	mkdir(a)
+
+#define ftruncate(a,b)	chsize(a,b)
+
+/* Windows doesn't have fsync() as such, use _commit() */
+#define fsync(fd) _commit(fd)
+
+/*
+ * For historical reasons, we allow setting wal_sync_method to
+ * fsync_writethrough on Windows, even though it's really identical to fsync
+ * (both code paths wind up at _commit()).
+ */
+#define HAVE_FSYNC_WRITETHROUGH
+#define FSYNC_WRITETHROUGH_IS_FSYNC
+
+#define USES_WINSOCK
+
+/*
+ *	IPC defines
+ */
+#undef HAVE_UNION_SEMUN
+#define HAVE_UNION_SEMUN 1
+
+#define IPC_RMID 256
+#define IPC_CREAT 512
+#define IPC_EXCL 1024
+#define IPC_PRIVATE 234564
+#define IPC_NOWAIT	2048
+#define IPC_STAT 4096
+
+#define EACCESS 2048
+#ifndef EIDRM
+#define EIDRM 4096
+#endif
+
+#define SETALL 8192
+#define GETNCNT 16384
+#define GETVAL 65536
+#define SETVAL 131072
+#define GETPID 262144
+
+
+/*
+ *	Signal stuff
+ *
+ *	For WIN32, there is no wait() call so there are no wait() macros
+ *	to interpret the return value of system().  Instead, system()
+ *	return values < 0x100 are used for exit() termination, and higher
+ *	values are used to indicate non-exit() termination, which is
+ *	similar to a unix-style signal exit (think SIGSEGV ==
+ *	STATUS_ACCESS_VIOLATION).  Return values are broken up into groups:
+ *
+ *	https://docs.microsoft.com/en-us/windows-hardware/drivers/kernel/using-ntstatus-values
+ *
+ *		NT_SUCCESS			0 - 0x3FFFFFFF
+ *		NT_INFORMATION		0x40000000 - 0x7FFFFFFF
+ *		NT_WARNING			0x80000000 - 0xBFFFFFFF
+ *		NT_ERROR			0xC0000000 - 0xFFFFFFFF
+ *
+ *	Effectively, we don't care on the severity of the return value from
+ *	system(), we just need to know if it was because of exit() or generated
+ *	by the system, and it seems values >= 0x100 are system-generated.
+ *	See this URL for a list of WIN32 STATUS_* values:
+ *
+ *		Wine (URL used in our error messages) -
+ *			http://source.winehq.org/source/include/ntstatus.h
+ *		Descriptions -
+ *			https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-erref/596a1078-e883-4972-9bbc-49e60bebca55
+ *
+ *	The comprehensive exception list is included in ntstatus.h from the
+ *	Windows	Driver Kit (WDK).  A subset of the list is also included in
+ *	winnt.h from the Windows SDK.  Defining WIN32_NO_STATUS before including
+ *	windows.h helps to avoid any conflicts.
+ *
+ *	Some day we might want to print descriptions for the most common
+ *	exceptions, rather than printing an include file name.  We could use
+ *	RtlNtStatusToDosError() and pass to FormatMessage(), which can print
+ *	the text of error values, but MinGW does not support
+ *	RtlNtStatusToDosError().
+ */
+#define WIFEXITED(w)	(((w) & 0XFFFFFF00) == 0)
+#define WIFSIGNALED(w)	(!WIFEXITED(w))
+#define WEXITSTATUS(w)	(w)
+#define WTERMSIG(w)		(w)
+
+#define sigmask(sig) ( 1 << ((sig)-1) )
+
+/* Signal function return values */
+#undef SIG_DFL
+#undef SIG_ERR
+#undef SIG_IGN
+#define SIG_DFL ((pqsigfunc)0)
+#define SIG_ERR ((pqsigfunc)-1)
+#define SIG_IGN ((pqsigfunc)1)
+
+/* Some extra signals */
+#define SIGHUP				1
+#define SIGQUIT				3
+#define SIGTRAP				5
+#define SIGABRT				22	/* Set to match W32 value -- not UNIX value */
+#define SIGKILL				9
+#define SIGPIPE				13
+#define SIGALRM				14
+#define SIGSTOP				17
+#define SIGTSTP				18
+#define SIGCONT				19
+#define SIGCHLD				20
+#define SIGWINCH			28
+#define SIGUSR1				30
+#define SIGUSR2				31
+
+/*
+ * New versions of MinGW have gettimeofday() and also declare
+ * struct timezone to support it.
+ */
+#ifndef HAVE_GETTIMEOFDAY
+struct timezone
+{
+	int			tz_minuteswest; /* Minutes west of GMT.  */
+	int			tz_dsttime;		/* Nonzero if DST is ever in effect.  */
+};
+#endif
+
+/* for setitimer in backend/port/win32/timer.c */
+#define ITIMER_REAL 0
+struct itimerval
+{
+	struct timeval it_interval;
+	struct timeval it_value;
+};
+
+int			setitimer(int which, const struct itimerval *value, struct itimerval *ovalue);
+
+/*
+ * WIN32 does not provide 64-bit off_t, but does provide the functions operating
+ * with 64-bit offsets.
+ */
+#define pgoff_t __int64
+
+#ifdef _MSC_VER
+#define fseeko(stream, offset, origin) _fseeki64(stream, offset, origin)
+#define ftello(stream) _ftelli64(stream)
+#else
+#ifndef fseeko
+#define fseeko(stream, offset, origin) fseeko64(stream, offset, origin)
+#endif
+#ifndef ftello
+#define ftello(stream) ftello64(stream)
+#endif
+#endif
+
+/*
+ *	Win32 also doesn't have symlinks, but we can emulate them with
+ *	junction points on newer Win32 versions.
+ *
+ *	Cygwin has its own symlinks which work on Win95/98/ME where
+ *	junction points don't, so use those instead.  We have no way of
+ *	knowing what type of system Cygwin binaries will be run on.
+ *		Note: Some CYGWIN includes might #define WIN32.
+ */
+extern int	pgsymlink(const char *oldpath, const char *newpath);
+extern int	pgreadlink(const char *path, char *buf, size_t size);
+extern bool pgwin32_is_junction(const char *path);
+
+#define symlink(oldpath, newpath)	pgsymlink(oldpath, newpath)
+#define readlink(path, buf, size)	pgreadlink(path, buf, size)
+
+/*
+ * Supplement to <sys/types.h>.
+ *
+ * Perl already has typedefs for uid_t and gid_t.
+ */
+#ifndef PLPERL_HAVE_UID_GID
+typedef int uid_t;
+typedef int gid_t;
+#endif
+typedef long key_t;
+
+#ifdef _MSC_VER
+typedef int pid_t;
+#endif
+
+/*
+ * Supplement to <sys/stat.h>.
+ *
+ * We must pull in sys/stat.h before this part, else our overrides lose.
+ *
+ * stat() is not guaranteed to set the st_size field on win32, so we
+ * redefine it to our own implementation.  See src/port/win32stat.c.
+ *
+ * The struct stat is 32 bit in MSVC, so we redefine it as a copy of
+ * struct __stat64.  This also fixes the struct size for MINGW builds.
+ */
+struct stat						/* This should match struct __stat64 */
+{
+	_dev_t		st_dev;
+	_ino_t		st_ino;
+	unsigned short st_mode;
+	short		st_nlink;
+	short		st_uid;
+	short		st_gid;
+	_dev_t		st_rdev;
+	__int64		st_size;
+	__time64_t	st_atime;
+	__time64_t	st_mtime;
+	__time64_t	st_ctime;
+};
+
+extern int	_pgfstat64(int fileno, struct stat *buf);
+extern int	_pgstat64(const char *name, struct stat *buf);
+
+#define fstat(fileno, sb)	_pgfstat64(fileno, sb)
+#define stat(path, sb)		_pgstat64(path, sb)
+#define lstat(path, sb)		_pgstat64(path, sb)
+
+/* These macros are not provided by older MinGW, nor by MSVC */
+#ifndef S_IRUSR
+#define S_IRUSR _S_IREAD
+#endif
+#ifndef S_IWUSR
+#define S_IWUSR _S_IWRITE
+#endif
+#ifndef S_IXUSR
+#define S_IXUSR _S_IEXEC
+#endif
+#ifndef S_IRWXU
+#define S_IRWXU (S_IRUSR | S_IWUSR | S_IXUSR)
+#endif
+#ifndef S_IRGRP
+#define S_IRGRP 0
+#endif
+#ifndef S_IWGRP
+#define S_IWGRP 0
+#endif
+#ifndef S_IXGRP
+#define S_IXGRP 0
+#endif
+#ifndef S_IRWXG
+#define S_IRWXG 0
+#endif
+#ifndef S_IROTH
+#define S_IROTH 0
+#endif
+#ifndef S_IWOTH
+#define S_IWOTH 0
+#endif
+#ifndef S_IXOTH
+#define S_IXOTH 0
+#endif
+#ifndef S_IRWXO
+#define S_IRWXO 0
+#endif
+#ifndef S_ISDIR
+#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
+#endif
+#ifndef S_ISREG
+#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
+#endif
+
+/*
+ * Supplement to <fcntl.h>.
+ * This is the same value as _O_NOINHERIT in the MS header file. This is
+ * to ensure that we don't collide with a future definition. It means
+ * we cannot use _O_NOINHERIT ourselves.
+ */
+#define O_DSYNC 0x0080
+
+/*
+ * Supplement to <errno.h>.
+ *
+ * We redefine network-related Berkeley error symbols as the corresponding WSA
+ * constants. This allows strerror.c to recognize them as being in the Winsock
+ * error code range and pass them off to win32_socket_strerror(), since
+ * Windows' version of plain strerror() won't cope.  Note that this will break
+ * if these names are used for anything else besides Windows Sockets errors.
+ * See TranslateSocketError() when changing this list.
+ */
+#undef EAGAIN
+#define EAGAIN WSAEWOULDBLOCK
+#undef EINTR
+#define EINTR WSAEINTR
+#undef EMSGSIZE
+#define EMSGSIZE WSAEMSGSIZE
+#undef EAFNOSUPPORT
+#define EAFNOSUPPORT WSAEAFNOSUPPORT
+#undef EWOULDBLOCK
+#define EWOULDBLOCK WSAEWOULDBLOCK
+#undef ECONNABORTED
+#define ECONNABORTED WSAECONNABORTED
+#undef ECONNRESET
+#define ECONNRESET WSAECONNRESET
+#undef EINPROGRESS
+#define EINPROGRESS WSAEINPROGRESS
+#undef EISCONN
+#define EISCONN WSAEISCONN
+#undef ENOBUFS
+#define ENOBUFS WSAENOBUFS
+#undef EPROTONOSUPPORT
+#define EPROTONOSUPPORT WSAEPROTONOSUPPORT
+#undef ECONNREFUSED
+#define ECONNREFUSED WSAECONNREFUSED
+#undef ENOTSOCK
+#define ENOTSOCK WSAENOTSOCK
+#undef EOPNOTSUPP
+#define EOPNOTSUPP WSAEOPNOTSUPP
+#undef EADDRINUSE
+#define EADDRINUSE WSAEADDRINUSE
+#undef EADDRNOTAVAIL
+#define EADDRNOTAVAIL WSAEADDRNOTAVAIL
+#undef EHOSTDOWN
+#define EHOSTDOWN WSAEHOSTDOWN
+#undef EHOSTUNREACH
+#define EHOSTUNREACH WSAEHOSTUNREACH
+#undef ENETDOWN
+#define ENETDOWN WSAENETDOWN
+#undef ENETRESET
+#define ENETRESET WSAENETRESET
+#undef ENETUNREACH
+#define ENETUNREACH WSAENETUNREACH
+#undef ENOTCONN
+#define ENOTCONN WSAENOTCONN
+
+/*
+ * Locale stuff.
+ *
+ * Extended locale functions with gratuitous underscore prefixes.
+ * (These APIs are nevertheless fully documented by Microsoft.)
+ */
+#define locale_t _locale_t
+#define tolower_l _tolower_l
+#define toupper_l _toupper_l
+#define towlower_l _towlower_l
+#define towupper_l _towupper_l
+#define isdigit_l _isdigit_l
+#define iswdigit_l _iswdigit_l
+#define isalpha_l _isalpha_l
+#define iswalpha_l _iswalpha_l
+#define isalnum_l _isalnum_l
+#define iswalnum_l _iswalnum_l
+#define isupper_l _isupper_l
+#define iswupper_l _iswupper_l
+#define islower_l _islower_l
+#define iswlower_l _iswlower_l
+#define isgraph_l _isgraph_l
+#define iswgraph_l _iswgraph_l
+#define isprint_l _isprint_l
+#define iswprint_l _iswprint_l
+#define ispunct_l _ispunct_l
+#define iswpunct_l _iswpunct_l
+#define isspace_l _isspace_l
+#define iswspace_l _iswspace_l
+#define strcoll_l _strcoll_l
+#define strxfrm_l _strxfrm_l
+#define wcscoll_l _wcscoll_l
+#define wcstombs_l _wcstombs_l
+#define mbstowcs_l _mbstowcs_l
+
+/*
+ * Versions of libintl >= 0.18? try to replace setlocale() with a macro
+ * to their own versions.  Remove the macro, if it exists, because it
+ * ends up calling the wrong version when the backend and libintl use
+ * different versions of msvcrt.
+ */
+#if defined(setlocale)
+#undef setlocale
+#endif
+
+/*
+ * Define our own wrapper macro around setlocale() to work around bugs in
+ * Windows' native setlocale() function.
+ */
+extern char *pgwin32_setlocale(int category, const char *locale);
+
+#define setlocale(a,b) pgwin32_setlocale(a,b)
+
+
+/* In backend/port/win32/signal.c */
+extern PGDLLIMPORT volatile int pg_signal_queue;
+extern PGDLLIMPORT int pg_signal_mask;
+extern HANDLE pgwin32_signal_event;
+extern HANDLE pgwin32_initial_signal_pipe;
+
+#define UNBLOCKED_SIGNAL_QUEUE()	(pg_signal_queue & ~pg_signal_mask)
+#define PG_SIGNAL_COUNT 32
+
+void		pgwin32_signal_initialize(void);
+HANDLE		pgwin32_create_signal_listener(pid_t pid);
+void		pgwin32_dispatch_queued_signals(void);
+void		pg_queue_signal(int signum);
+
+/* In src/port/kill.c */
+#define kill(pid,sig)	pgkill(pid,sig)
+extern int	pgkill(int pid, int sig);
+
+/* In backend/port/win32/socket.c */
+#ifndef FRONTEND
+#define socket(af, type, protocol) pgwin32_socket(af, type, protocol)
+#define bind(s, addr, addrlen) pgwin32_bind(s, addr, addrlen)
+#define listen(s, backlog) pgwin32_listen(s, backlog)
+#define accept(s, addr, addrlen) pgwin32_accept(s, addr, addrlen)
+#define connect(s, name, namelen) pgwin32_connect(s, name, namelen)
+#define select(n, r, w, e, timeout) pgwin32_select(n, r, w, e, timeout)
+#define recv(s, buf, len, flags) pgwin32_recv(s, buf, len, flags)
+#define send(s, buf, len, flags) pgwin32_send(s, buf, len, flags)
+
+SOCKET		pgwin32_socket(int af, int type, int protocol);
+int			pgwin32_bind(SOCKET s, struct sockaddr *addr, int addrlen);
+int			pgwin32_listen(SOCKET s, int backlog);
+SOCKET		pgwin32_accept(SOCKET s, struct sockaddr *addr, int *addrlen);
+int			pgwin32_connect(SOCKET s, const struct sockaddr *name, int namelen);
+int			pgwin32_select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, const struct timeval *timeout);
+int			pgwin32_recv(SOCKET s, char *buf, int len, int flags);
+int			pgwin32_send(SOCKET s, const void *buf, int len, int flags);
+int			pgwin32_waitforsinglesocket(SOCKET s, int what, int timeout);
+
+extern int	pgwin32_noblock;
+
+#endif							/* FRONTEND */
+
+/* in backend/port/win32_shmem.c */
+extern int	pgwin32_ReserveSharedMemoryRegion(HANDLE);
+
+/* in backend/port/win32/crashdump.c */
+extern void pgwin32_install_crashdump_handler(void);
+
+/* in port/win32error.c */
+extern void _dosmaperr(unsigned long);
+
+/* in port/win32env.c */
+extern int	pgwin32_putenv(const char *);
+extern int	pgwin32_setenv(const char *name, const char *value, int overwrite);
+extern int	pgwin32_unsetenv(const char *name);
+
+#define putenv(x) pgwin32_putenv(x)
+#define setenv(x,y,z) pgwin32_setenv(x,y,z)
+#define unsetenv(x) pgwin32_unsetenv(x)
+
+/* in port/win32security.c */
+extern int	pgwin32_is_service(void);
+extern int	pgwin32_is_admin(void);
+
+/* Windows security token manipulation (in src/common/exec.c) */
+extern BOOL AddUserToTokenDacl(HANDLE hToken);
+
+/* Things that exist in MinGW headers, but need to be added to MSVC */
+#ifdef _MSC_VER
+
+#ifndef _WIN64
+typedef long ssize_t;
+#else
+typedef __int64 ssize_t;
+#endif
+
+typedef unsigned short mode_t;
+
+#define F_OK 0
+#define W_OK 2
+#define R_OK 4
+
+/* Pulled from Makefile.port in MinGW */
+#define DLSUFFIX ".dll"
+
+#endif							/* _MSC_VER */
+
+#if (defined(_MSC_VER) && (_MSC_VER < 1900)) || \
+	defined(__MINGW32__) || defined(__MINGW64__)
+/*
+ * VS2013 has a strtof() that seems to give correct answers for valid input,
+ * even on the rounding edge cases, but which doesn't handle out-of-range
+ * input correctly. Work around that.
+ *
+ * Mingw claims to have a strtof, and my reading of its source code suggests
+ * that it ought to work (and not need this hack), but the regression test
+ * results disagree with me; whether this is a version issue or not is not
+ * clear. However, using our wrapper (and the misrounded-input variant file,
+ * already required for supporting ancient systems) can't make things any
+ * worse, except for a tiny performance loss when reading zeros.
+ *
+ * See also cygwin.h for another instance of this.
+ */
+#define HAVE_BUGGY_STRTOF 1
+#endif
+
+#endif							/* PG_WIN32_PORT_H */