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Recent versions of the Linux system header files cause xlogdefs.h to believe that open_datasync should be the default sync method, whereas formerly fdatasync was the default on Linux. open_datasync is a bad choice, first because it doesn't actually outperform fdatasync (in fact the reverse), and second because we try to use O_DIRECT with it, causing failures on certain filesystems (e.g., ext4 with data=journal option). This part of the patch is largely per a proposal from Marti Raudsepp. More extensive changes are likely to follow in HEAD, but this is as much change as we want to back-patch. Also clean up confusing code and incorrect documentation surrounding the fsync_writethrough option. Those changes shouldn't result in any actual behavioral change, but I chose to back-patch them anyway to keep the branches looking similar in this area. In 9.0 and HEAD, also do some copy-editing on the WAL Reliability documentation section. Back-patch to all supported branches, since any of them might get used on modern Linux versions.
368 lines
10 KiB
C
368 lines
10 KiB
C
/* src/include/port/win32.h */
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#if defined(_MSC_VER) || defined(__BORLANDC__)
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#define WIN32_ONLY_COMPILER
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#endif
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#define _WIN32_WINNT 0x0501
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/*
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* Always build with SSPI support. Keep it as a #define in case
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* we want a switch to disable it sometime in the future.
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*/
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#ifndef __BORLANDC__
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#define ENABLE_SSPI 1
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#endif
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/* undefine and redefine after #include */
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#undef mkdir
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#undef ERROR
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#define _WINSOCKAPI_
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#include <windows.h>
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#include <winsock2.h>
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#include <ws2tcpip.h>
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#undef small
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#include <process.h>
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#include <signal.h>
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#include <errno.h>
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#include <direct.h>
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#ifndef __BORLANDC__
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#include <sys/utime.h> /* for non-unicode version */
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#endif
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#undef near
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/* Must be here to avoid conflicting with prototype in windows.h */
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#define mkdir(a,b) mkdir(a)
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#define ftruncate(a,b) chsize(a,b)
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/* Windows doesn't have fsync() as such, use _commit() */
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#define fsync(fd) _commit(fd)
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/*
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* For historical reasons, we allow setting wal_sync_method to
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* fsync_writethrough on Windows, even though it's really identical to fsync
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* (both code paths wind up at _commit()).
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*/
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#define HAVE_FSYNC_WRITETHROUGH
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#define FSYNC_WRITETHROUGH_IS_FSYNC
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#define USES_WINSOCK
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/* defines for dynamic linking on Win32 platform */
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#if defined(WIN32) || defined(__CYGWIN__)
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#if __GNUC__ && ! defined (__declspec)
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#error You need egcs 1.1 or newer for compiling!
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#endif
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#ifdef BUILDING_DLL
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#define PGDLLIMPORT __declspec (dllexport)
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#else /* not BUILDING_DLL */
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#define PGDLLIMPORT __declspec (dllimport)
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#endif
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#ifdef _MSC_VER
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#define PGDLLEXPORT __declspec (dllexport)
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#else
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#define PGDLLEXPORT
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#endif
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#else /* not CYGWIN, not MSVC, not MingW */
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#define PGDLLIMPORT
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#define PGDLLEXPORT
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#endif
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/*
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* IPC defines
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*/
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#undef HAVE_UNION_SEMUN
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#define HAVE_UNION_SEMUN 1
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#define IPC_RMID 256
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#define IPC_CREAT 512
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#define IPC_EXCL 1024
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#define IPC_PRIVATE 234564
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#define IPC_NOWAIT 2048
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#define IPC_STAT 4096
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#define EACCESS 2048
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#define EIDRM 4096
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#define SETALL 8192
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#define GETNCNT 16384
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#define GETVAL 65536
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#define SETVAL 131072
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#define GETPID 262144
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/*
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* Signal stuff
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*
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* For WIN32, there is no wait() call so there are no wait() macros
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* to interpret the return value of system(). Instead, system()
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* return values < 0x100 are used for exit() termination, and higher
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* values are used to indicated non-exit() termination, which is
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* similar to a unix-style signal exit (think SIGSEGV ==
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* STATUS_ACCESS_VIOLATION). Return values are broken up into groups:
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*
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* http://msdn2.microsoft.com/en-gb/library/aa489609.aspx
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*
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* NT_SUCCESS 0 - 0x3FFFFFFF
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* NT_INFORMATION 0x40000000 - 0x7FFFFFFF
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* NT_WARNING 0x80000000 - 0xBFFFFFFF
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* NT_ERROR 0xC0000000 - 0xFFFFFFFF
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*
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* Effectively, we don't care on the severity of the return value from
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* system(), we just need to know if it was because of exit() or generated
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* by the system, and it seems values >= 0x100 are system-generated.
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* See this URL for a list of WIN32 STATUS_* values:
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*
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* Wine (URL used in our error messages) -
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* http://source.winehq.org/source/include/ntstatus.h
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* Descriptions - http://www.comp.nus.edu.sg/~wuyongzh/my_doc/ntstatus.txt
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* MS SDK - http://www.nologs.com/ntstatus.html
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*
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* It seems the exception lists are in both ntstatus.h and winnt.h, but
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* ntstatus.h has a more comprehensive list, and it only contains
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* exception values, rather than winnt, which contains lots of other
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* things:
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*
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* http://www.microsoft.com/msj/0197/exception/exception.aspx
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*
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* The ExceptionCode parameter is the number that the operating system
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* assigned to the exception. You can see a list of various exception codes
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* in WINNT.H by searching for #defines that start with "STATUS_". For
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* example, the code for the all-too-familiar STATUS_ACCESS_VIOLATION is
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* 0xC0000005. A more complete set of exception codes can be found in
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* NTSTATUS.H from the Windows NT DDK.
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*
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* Some day we might want to print descriptions for the most common
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* exceptions, rather than printing an include file name. We could use
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* RtlNtStatusToDosError() and pass to FormatMessage(), which can print
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* the text of error values, but MinGW does not support
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* RtlNtStatusToDosError().
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*/
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#define WIFEXITED(w) (((w) & 0XFFFFFF00) == 0)
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#define WIFSIGNALED(w) (!WIFEXITED(w))
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#define WEXITSTATUS(w) (w)
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#define WTERMSIG(w) (w)
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#define sigmask(sig) ( 1 << ((sig)-1) )
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/* Signal function return values */
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#undef SIG_DFL
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#undef SIG_ERR
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#undef SIG_IGN
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#define SIG_DFL ((pqsigfunc)0)
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#define SIG_ERR ((pqsigfunc)-1)
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#define SIG_IGN ((pqsigfunc)1)
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/* Some extra signals */
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#define SIGHUP 1
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#define SIGQUIT 3
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#define SIGTRAP 5
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#define SIGABRT 22 /* Set to match W32 value -- not UNIX value */
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#define SIGKILL 9
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#define SIGPIPE 13
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#define SIGALRM 14
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#define SIGSTOP 17
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#define SIGTSTP 18
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#define SIGCONT 19
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#define SIGCHLD 20
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#define SIGTTIN 21
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#define SIGTTOU 22 /* Same as SIGABRT -- no problem, I hope */
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#define SIGWINCH 28
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#ifndef __BORLANDC__
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#define SIGUSR1 30
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#define SIGUSR2 31
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#endif
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/*
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* New versions of mingw have gettimeofday() and also declare
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* struct timezone to support it.
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*/
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#ifndef HAVE_GETTIMEOFDAY
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struct timezone
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{
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int tz_minuteswest; /* Minutes west of GMT. */
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int tz_dsttime; /* Nonzero if DST is ever in effect. */
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};
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#endif
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/* for setitimer in backend/port/win32/timer.c */
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#define ITIMER_REAL 0
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struct itimerval
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{
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struct timeval it_interval;
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struct timeval it_value;
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};
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int setitimer(int which, const struct itimerval * value, struct itimerval * ovalue);
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/*
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* WIN32 does not provide 64-bit off_t, but does provide the functions operating
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* with 64-bit offsets.
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*/
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#define pgoff_t __int64
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#ifdef WIN32_ONLY_COMPILER
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#define fseeko(stream, offset, origin) _fseeki64(stream, offset, origin)
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#define ftello(stream) _ftelli64(stream)
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#else
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#define fseeko(stream, offset, origin) fseeko64(stream, offset, origin)
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#define ftello(stream) ftello64(stream)
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#endif
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/*
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* Supplement to <sys/types.h>.
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*
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* Perl already has typedefs for uid_t and gid_t.
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*/
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#ifndef PLPERL_HAVE_UID_GID
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typedef int uid_t;
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typedef int gid_t;
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#endif
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typedef long key_t;
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#ifdef WIN32_ONLY_COMPILER
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typedef int pid_t;
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#endif
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/*
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* Supplement to <sys/stat.h>.
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*/
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#define lstat(path, sb) stat((path), (sb))
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/*
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* Supplement to <fcntl.h>.
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* This is the same value as _O_NOINHERIT in the MS header file. This is
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* to ensure that we don't collide with a future definition. It means
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* we cannot use _O_NOINHERIT ourselves.
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*/
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#define O_DSYNC 0x0080
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/*
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* Supplement to <errno.h>.
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*/
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#undef EAGAIN
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#undef EINTR
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#define EINTR WSAEINTR
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#define EAGAIN WSAEWOULDBLOCK
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#define EMSGSIZE WSAEMSGSIZE
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#define EAFNOSUPPORT WSAEAFNOSUPPORT
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#define EWOULDBLOCK WSAEWOULDBLOCK
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#define ECONNRESET WSAECONNRESET
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#define EINPROGRESS WSAEINPROGRESS
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#define ENOBUFS WSAENOBUFS
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#define EPROTONOSUPPORT WSAEPROTONOSUPPORT
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#define ECONNREFUSED WSAECONNREFUSED
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#define EBADFD WSAENOTSOCK
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#define EOPNOTSUPP WSAEOPNOTSUPP
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/* In backend/port/win32/signal.c */
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extern PGDLLIMPORT volatile int pg_signal_queue;
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extern PGDLLIMPORT int pg_signal_mask;
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extern HANDLE pgwin32_signal_event;
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extern HANDLE pgwin32_initial_signal_pipe;
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#define UNBLOCKED_SIGNAL_QUEUE() (pg_signal_queue & ~pg_signal_mask)
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void pgwin32_signal_initialize(void);
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HANDLE pgwin32_create_signal_listener(pid_t pid);
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void pgwin32_dispatch_queued_signals(void);
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void pg_queue_signal(int signum);
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/* In backend/port/win32/socket.c */
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#ifndef FRONTEND
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#define socket(af, type, protocol) pgwin32_socket(af, type, protocol)
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#define accept(s, addr, addrlen) pgwin32_accept(s, addr, addrlen)
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#define connect(s, name, namelen) pgwin32_connect(s, name, namelen)
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#define select(n, r, w, e, timeout) pgwin32_select(n, r, w, e, timeout)
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#define recv(s, buf, len, flags) pgwin32_recv(s, buf, len, flags)
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#define send(s, buf, len, flags) pgwin32_send(s, buf, len, flags)
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SOCKET pgwin32_socket(int af, int type, int protocol);
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SOCKET pgwin32_accept(SOCKET s, struct sockaddr * addr, int *addrlen);
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int pgwin32_connect(SOCKET s, const struct sockaddr * name, int namelen);
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int pgwin32_select(int nfds, fd_set *readfs, fd_set *writefds, fd_set *exceptfds, const struct timeval * timeout);
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int pgwin32_recv(SOCKET s, char *buf, int len, int flags);
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int pgwin32_send(SOCKET s, char *buf, int len, int flags);
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const char *pgwin32_socket_strerror(int err);
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int pgwin32_waitforsinglesocket(SOCKET s, int what, int timeout);
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extern int pgwin32_noblock;
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/* in backend/port/win32/security.c */
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extern int pgwin32_is_admin(void);
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extern int pgwin32_is_service(void);
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#endif
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/* in backend/port/win32_shmem.c */
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extern int pgwin32_ReserveSharedMemoryRegion(HANDLE);
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/* in port/win32error.c */
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extern void _dosmaperr(unsigned long);
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/* in port/win32env.c */
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extern int pgwin32_putenv(const char *);
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extern void pgwin32_unsetenv(const char *);
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#define putenv(x) pgwin32_putenv(x)
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#define unsetenv(x) pgwin32_unsetenv(x)
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/* Things that exist in MingW headers, but need to be added to MSVC & BCC */
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#ifdef WIN32_ONLY_COMPILER
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#ifndef _WIN64
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typedef long ssize_t;
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#else
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typedef __int64 ssize_t;
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#endif
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#ifndef __BORLANDC__
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typedef unsigned short mode_t;
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#endif
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#ifndef __BORLANDC__
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#define _S_IRWXU (_S_IREAD | _S_IWRITE | _S_IEXEC)
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#define _S_IXUSR _S_IEXEC
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#define _S_IWUSR _S_IWRITE
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#define _S_IRUSR _S_IREAD
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#define S_IRUSR _S_IRUSR
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#define S_IWUSR _S_IWUSR
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#define S_IXUSR _S_IXUSR
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#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
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#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
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#endif
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#define F_OK 0
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#define W_OK 2
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#define R_OK 4
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#define isinf(x) ((_fpclass(x) == _FPCLASS_PINF) || (_fpclass(x) == _FPCLASS_NINF))
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#define isnan(x) _isnan(x)
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/* Pulled from Makefile.port in mingw */
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#define DLSUFFIX ".dll"
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#ifdef __BORLANDC__
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/* for port/dirent.c */
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#ifndef INVALID_FILE_ATTRIBUTES
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#define INVALID_FILE_ATTRIBUTES ((DWORD) -1)
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#endif
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/* for port/open.c */
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#ifndef O_RANDOM
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#define O_RANDOM 0x0010 /* File access is primarily random */
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#define O_SEQUENTIAL 0x0020 /* File access is primarily sequential */
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#define O_TEMPORARY 0x0040 /* Temporary file bit */
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#define O_SHORT_LIVED 0x1000 /* Temporary storage file, try not to flush */
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#define _O_SHORT_LIVED O_SHORT_LIVED
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#endif /* ifndef O_RANDOM */
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#endif /* __BORLANDC__ */
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#endif
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