[perl5.git] / win32 / win32.h

/* WIN32.H
 *
 * (c) 1995 Microsoft Corporation. All rights reserved.
 * 		Developed by hip communications inc.
 *
 *    You may distribute under the terms of either the GNU General Public
 *    License or the Artistic License, as specified in the README file.
 */
#ifndef  _INC_WIN32_PERL5
#define  _INC_WIN32_PERL5

#ifndef _WIN32_WINNT
#  define _WIN32_WINNT 0x0500     /* needed for CreateHardlink() etc. */
#endif

/* Win32 only optimizations for faster building */
#ifdef PERL_IS_MINIPERL
/* this macro will remove Winsock only on miniperl, PERL_IMPLICIT_SYS and
 * makedef.pl create dependencies that will keep Winsock linked in even with
 * this macro defined, even though sockets will be umimplemented from a script
 * level in full perl
 */
#  define WIN32_NO_SOCKETS
/* less I/O calls during each require */
#  define PERL_DISABLE_PMC

/* unnecessery for miniperl to lookup anything from an "installed" perl */
#  define WIN32_NO_REGISTRY

/* allow minitest to work */
#  define PERL_TEXTMODE_SCRIPTS
#endif

#ifdef WIN32_NO_SOCKETS
#  undef HAS_SOCKET
#  undef HAS_GETPROTOBYNAME
#  undef HAS_GETPROTOBYNUMBER
#  undef HAS_GETPROTOENT
#  undef HAS_GETNETBYNAME
#  undef HAS_GETNETBYADDR
#  undef HAS_GETNETENT
#  undef HAS_GETSERVBYNAME
#  undef HAS_GETSERVBYPORT
#  undef HAS_GETSERVENT
#  undef HAS_GETHOSTBYNAME
#  undef HAS_GETHOSTBYADDR
#  undef HAS_GETHOSTENT
#  undef HAS_SELECT
#  undef HAS_IOCTL
#  undef HAS_NTOHL
#  undef HAS_HTONL
#  undef HAS_HTONS
#  undef HAS_NTOHS
#  define WIN32SCK_IS_STDSCK
#endif

#if defined(PERL_IMPLICIT_SYS)
#  define DYNAMIC_ENV_FETCH
#  define HAS_GETENV_LEN
#  define prime_env_iter()
#  define WIN32IO_IS_STDIO		/* don't pull in custom stdio layer */
#  define WIN32SCK_IS_STDSCK		/* don't pull in custom wsock layer */
#endif

#ifdef __GNUC__
#  ifndef __int64		/* some versions seem to #define it already */
#    define __int64 long long
#  endif
#  define Win32_Winsock
#endif


/* Define DllExport akin to perl's EXT,
 * If we are in the DLL then Export the symbol,
 * otherwise import it.
 */

/* now even GCC supports __declspec() */
/* miniperl has no reason to export anything */
#if defined(PERL_IS_MINIPERL)
#  define DllExport
#else
#  if defined(PERLDLL)
#    define DllExport __declspec(dllexport)
#  else
#    define DllExport __declspec(dllimport)
#  endif
#endif

/* The Perl APIs can only be called directly inside the perl5xx.dll.
 * All other code has to import them.  By declaring them as "dllimport"
 * we tell the compiler to generate an indirect call instruction and
 * avoid redirection through a call thunk.
 *
 * The XS code in the re extension is special, in that it redefines
 * core APIs locally, so don't mark them as "dllimport" because GCC
 * cannot handle this situation.
 *
 * Certain old GCCs will not allow the function pointer of dllimport marked
 * function to be "const". This was fixed later on. Since this is a
 * deoptimization, target "gcc version 3.4.5 (mingw-vista special r3)" only,
 * The GCC bug was fixed in GCC patch "varasm.c (initializer_constant_valid_p):
 * Don't deny DECL_DLLIMPORT_P on functions", which probably was first released
 * in GCC 4.3.0, this #if can be expanded upto but not including 4.3.0 if more
 * deployed GCC are found that wont build with the follow error, initializer
 * element is a PerlIO func exported from perl5xx.dll.
 *
 * encoding.xs:610: error: initializer element is not constant
 * encoding.xs:610: error: (near initialization for `PerlIO_encode.Open')
 */

#if (defined(__GNUC__) && defined(__MINGW32__) && \
     !defined(__MINGW64_VERSION_MAJOR) && !defined(__clang__) && \
	((__GNUC__ < 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ <= 5))))
/* use default fallbacks from perl.h for this particular GCC */
#else
#  if !defined(PERLDLL) && !defined(PERL_EXT_RE_BUILD)
#    ifdef __cplusplus
#      define PERL_CALLCONV extern "C" __declspec(dllimport)
#      ifdef _MSC_VER
#        define PERL_CALLCONV_NO_RET extern "C" __declspec(dllimport) __declspec(noreturn)
#      endif
#    else
#      define PERL_CALLCONV __declspec(dllimport)
#      ifdef _MSC_VER
#        define PERL_CALLCONV_NO_RET __declspec(dllimport) __declspec(noreturn)
#      endif
#    endif
#  else /* MSVC noreturn support inside the interp */
#    ifdef _MSC_VER
#      define PERL_CALLCONV_NO_RET __declspec(noreturn)
#    endif
#  endif
#endif

#ifdef _MSC_VER
#  define PERL_STATIC_NO_RET __declspec(noreturn) static
#  define PERL_STATIC_INLINE_NO_RET __declspec(noreturn) PERL_STATIC_INLINE
#  define PERL_STATIC_FORCE_INLINE __forceinline static
#  define PERL_STATIC_FORCE_INLINE_NO_RET __declspec(noreturn) __forceinline static
#endif

#define  WIN32_LEAN_AND_MEAN
#include <windows.h>

/*
 * Bug in winbase.h in mingw-w64 4.4.0-1 at least... they
 * do #define GetEnvironmentStringsA GetEnvironmentStrings and fail
 * to declare GetEnvironmentStringsA.
 */
#if defined(__MINGW64__) && defined(GetEnvironmentStringsA) && !defined(UNICODE)
#ifdef __cplusplus
extern "C" {
#endif
#undef GetEnvironmentStringsA
WINBASEAPI LPCH WINAPI GetEnvironmentStringsA(VOID);
#define GetEnvironmentStrings GetEnvironmentStringsA
#ifdef __cplusplus
}
#endif
#endif

#ifdef   WIN32_LEAN_AND_MEAN		/* C file is NOT a Perl5 original. */
#define  CONTEXT	PERL_CONTEXT	/* Avoid conflict of CONTEXT defs. */
#endif /*WIN32_LEAN_AND_MEAN */

#ifndef TLS_OUT_OF_INDEXES
#define TLS_OUT_OF_INDEXES (DWORD)0xFFFFFFFF
#endif

#include <dirent.h>
#include <io.h>
#include <process.h>
#include <stdio.h>
#include <direct.h>
#include <stdlib.h>
#include <stddef.h>
#include <fcntl.h>
#ifndef EXT
#include "EXTERN.h"
#endif

struct tms {
	long	tms_utime;
	long	tms_stime;
	long	tms_cutime;
	long	tms_cstime;
};

#ifndef SYS_NMLN
#define SYS_NMLN	257
#endif

struct utsname {
    char sysname[SYS_NMLN];
    char nodename[SYS_NMLN];
    char release[SYS_NMLN];
    char version[SYS_NMLN];
    char machine[SYS_NMLN];
};

#ifndef START_EXTERN_C
#undef EXTERN_C
#ifdef __cplusplus
#  define START_EXTERN_C extern "C" {
#  define END_EXTERN_C }
#  define EXTERN_C extern "C"
#else
#  define START_EXTERN_C
#  define END_EXTERN_C
#  define EXTERN_C
#endif
#endif

#define  DOSISH		1		/* no escaping our roots */
#define  OP_BINARY	O_BINARY	/* mistake in in pp_sys.c? */

/* read() and write() aren't transparent for socket handles */
#ifndef WIN32_NO_SOCKETS
#  define PERL_SOCK_SYSREAD_IS_RECV
#  define PERL_SOCK_SYSWRITE_IS_SEND
#endif

#ifdef WIN32_NO_REGISTRY
/* the last _ in WIN32_NO_REGISTRY_M_ is like the _ in aTHX_ */
#  define WIN32_NO_REGISTRY_M_(x)
#else
#  define WIN32_NO_REGISTRY_M_(x) x,
#endif

#define ENV_IS_CASELESS

#define PIPESOCK_MODE	"b"		/* pipes, sockets default to binmode */

/* access() mode bits */
#ifndef R_OK
#  define	R_OK	4
#  define	W_OK	2
#  define	X_OK	1
#  define	F_OK	0
#endif

/* for waitpid() */
#ifndef WNOHANG
#  define WNOHANG	1
#endif

#define PERL_GET_CONTEXT_DEFINED

/* Compiler-specific stuff. */

/* VC uses non-standard way to determine the size and alignment if bit-fields */
/* MinGW will compile with -mms-bitfields, so should use the same types */
#define PERL_BITFIELD8  U8
#define PERL_BITFIELD16 U16
#define PERL_BITFIELD32 U32

#ifdef _MSC_VER			/* Microsoft Visual C++ */

typedef long		uid_t;
typedef long		gid_t;
typedef unsigned short	mode_t;

#if _MSC_VER < 1800
#define isnan		_isnan	/* Defined already in VC++ 12.0 */
#endif
#define snprintf	_snprintf
#define vsnprintf	_vsnprintf

/* on VS2003, msvcrt.lib is missing these symbols */
#if _MSC_VER >= 1300 && _MSC_VER < 1400
#  pragma intrinsic(_rotl64,_rotr64)
#endif

MSVC_DIAG_IGNORE(4756 4056)
PERL_STATIC_INLINE
double S_Infinity() {
    /* this is a real C literal which can get further constant folded
       unlike using HUGE_VAL/_HUGE which are data symbol imports from the CRT
       and therefore can not by folded by VC, an example of constant
       folding INF is creating -INF */
    return (DBL_MAX+DBL_MAX);
}
MSVC_DIAG_RESTORE

#define NV_INF S_Infinity()

/* selectany allows duplicate and unused data symbols to be removed by
   VC linker, if this were static, each translation unit will have its own,
   usually unused __PL_nan_u, if this were plain extern it will cause link
   to fail due to multiple definitions, since we dont know if we are being
   compiled as static or DLL XS, selectany simply always works, the cost of
   importing __PL_nan_u across DLL boundaries in size in the importing DLL
   will be more than the 8 bytes it will take up being in each XS DLL if
   that DLL actually uses __PL_nan_u */
extern const __declspec(selectany) union { unsigned __int64 __q; double __d; }
__PL_nan_u = { 0x7FF8000000000000UI64 };
#define NV_NAN ((NV)__PL_nan_u.__d)

/* The CRT was rewritten in VS2015. */
#if _MSC_VER >= 1900

/* No longer declared in stdio.h */
EXTERN_C char *gets(char* buffer);

#define tzname _tzname

/* From corecrt_internal_stdio.h: */
typedef struct
{
    union
    {
        FILE  _public_file;
        char* _ptr;
    };

    char*            _base;
    int              _cnt;
    long             _flags;
    long             _file;
    int              _charbuf;
    int              _bufsiz;
    char*            _tmpfname;
    CRITICAL_SECTION _lock;
} __crt_stdio_stream_data;

#define PERLIO_FILE_flag_RD 0x0001 /* _IOREAD   */
#define PERLIO_FILE_flag_WR 0x0002 /* _IOWRITE  */
#define PERLIO_FILE_flag_RW 0x0004 /* _IOUPDATE */
#define PERLIO_FILE_ptr(f)  (((__crt_stdio_stream_data*)(f))->_ptr)
#define PERLIO_FILE_base(f) (((__crt_stdio_stream_data*)(f))->_base)
#define PERLIO_FILE_cnt(f)  (((__crt_stdio_stream_data*)(f))->_cnt)
#define PERLIO_FILE_flag(f) ((int)(((__crt_stdio_stream_data*)(f))->_flags))
#define PERLIO_FILE_file(f) (*(int*)(&((__crt_stdio_stream_data*)(f))->_file))

#endif

#endif /* _MSC_VER */

#if (!defined(_MSC_VER)) || (defined(_MSC_VER) && _MSC_VER < 1900)

/* Note: PERLIO_FILE_ptr/base/cnt are not actually used for GCC or <VS2015
 * since FILE_ptr/base/cnt do the same thing anyway but it doesn't hurt to
 * define them all here for completeness. */
#define PERLIO_FILE_flag_RD _IOREAD /* 0x001 */
#define PERLIO_FILE_flag_WR _IOWRT  /* 0x002 */
#define PERLIO_FILE_flag_RW _IORW   /* 0x080 */
#define PERLIO_FILE_ptr(f)  ((f)->_ptr)
#define PERLIO_FILE_base(f) ((f)->_base)
#define PERLIO_FILE_cnt(f)  ((f)->_cnt)
#define PERLIO_FILE_flag(f) ((f)->_flag)
#define PERLIO_FILE_file(f) ((f)->_file)

#endif

#ifdef __MINGW32__		/* Minimal Gnu-Win32 */

typedef long		uid_t;
typedef long		gid_t;
#ifndef _environ
#define _environ	environ
#endif
#define flushall	_flushall
#define fcloseall	_fcloseall
#ifndef isnan
#define isnan		_isnan	/* ...same libraries as MSVC */
#endif

#ifndef _O_NOINHERIT
#  define _O_NOINHERIT	0x0080
#  ifndef _NO_OLDNAMES
#    define O_NOINHERIT	_O_NOINHERIT
#  endif
#endif

/* <stdint.h>, pulled in by <io.h> as of mingw-runtime-3.3, typedef's
 * (u)intptr_t but doesn't set the _(U)INTPTR_T_DEFINED defines */
#ifdef _STDINT_H
#  ifndef _INTPTR_T_DEFINED
#    define _INTPTR_T_DEFINED
#  endif
#  ifndef _UINTPTR_T_DEFINED
#    define _UINTPTR_T_DEFINED
#  endif
#endif

#ifndef CP_UTF8
#  define CP_UTF8	65001
#endif

#endif /* __MINGW32__ */

#ifndef _INTPTR_T_DEFINED
typedef int		intptr_t;
#  define _INTPTR_T_DEFINED
#endif

#ifndef _UINTPTR_T_DEFINED
typedef unsigned int	uintptr_t;
#  define _UINTPTR_T_DEFINED
#endif

START_EXTERN_C

/* For UNIX compatibility. */

#ifdef PERL_CORE
extern  uid_t	getuid(void);
extern  gid_t	getgid(void);
extern  uid_t	geteuid(void);
extern  gid_t	getegid(void);
extern  int	setuid(uid_t uid);
extern  int	setgid(gid_t gid);
extern  int	kill(int pid, int sig);
#ifndef USE_PERL_SBRK
extern  void	*sbrk(ptrdiff_t need);
#  define HAS_SBRK_PROTO
#endif
extern	char *	getlogin(void);
extern	int	chown(const char *p, uid_t o, gid_t g);
#if !defined(__MINGW64_VERSION_MAJOR) || __MINGW64_VERSION_MAJOR < 4
extern  int	mkstemp(const char *path);
#endif
#endif

#undef	 Stat
#define  Stat		win32_stat

#undef   init_os_extras
#define  init_os_extras Perl_init_os_extras

DllExport void		Perl_win32_init(int *argcp, char ***argvp);
DllExport void		Perl_win32_term(void);
DllExport void		Perl_init_os_extras(void);
DllExport void		win32_str_os_error(void *sv, DWORD err);
DllExport int		RunPerl(int argc, char **argv, char **env);

typedef struct {
    HANDLE	childStdIn;
    HANDLE	childStdOut;
    HANDLE	childStdErr;
    /*
     * the following correspond to the fields of the same name
     * in the STARTUPINFO structure. Embedders can use these to
     * control the spawning process' look.
     * Example - to hide the window of the spawned process:
     *    dwFlags = STARTF_USESHOWWINDOW;
     *	  wShowWindow = SW_HIDE;
     */
    DWORD	dwFlags;
    DWORD	dwX;
    DWORD	dwY;
    DWORD	dwXSize;
    DWORD	dwYSize;
    DWORD	dwXCountChars;
    DWORD	dwYCountChars;
    DWORD	dwFillAttribute;
    WORD	wShowWindow;
} child_IO_table;

DllExport void		win32_get_child_IO(child_IO_table* ptr);
DllExport HWND		win32_create_message_window(void);
DllExport int		win32_async_check(pTHX);

extern int		my_fclose(FILE *);
extern char *		win32_get_privlib(WIN32_NO_REGISTRY_M_(const char *pl) STRLEN *const len);
extern char *		win32_get_sitelib(const char *pl, STRLEN *const len);
extern char *		win32_get_vendorlib(const char *pl, STRLEN *const len);

#ifdef PERL_IMPLICIT_SYS
extern void		win32_delete_internal_host(void *h);
#endif

extern int		win32_get_errno(int err);

extern const char * const		staticlinkmodules[];

END_EXTERN_C

typedef  char *		caddr_t;	/* In malloc.c (core address). */

/*
 * handle socket stuff, assuming socket is always available
 */
#include <sys/socket.h>
#include <netdb.h>

#ifdef MYMALLOC
#define EMBEDMYMALLOC	/**/
/* #define USE_PERL_SBRK	/ **/
/* #define PERL_SBRK_VIA_MALLOC	/ **/
#endif

#ifdef PERL_TEXTMODE_SCRIPTS
#  define PERL_SCRIPT_MODE		"r"
#else
#  define PERL_SCRIPT_MODE		"rb"
#endif

/*
 * Now Win32 specific per-thread data stuff
 */

/* Leave the first couple ids after WM_USER unused because they
 * might be used by an embedding application, and on Windows
 * version before 2000 we might end up eating those messages
 * if they were not meant for us.
 */
#define WM_USER_MIN     (WM_USER+30)
#define WM_USER_MESSAGE (WM_USER_MIN)
#define WM_USER_KILL    (WM_USER_MIN+1)
#define WM_USER_MAX     (WM_USER_MIN+1)

struct thread_intern {
    /* XXX can probably use one buffer instead of several */
    char		Wstrerror_buffer[512];
    struct servent	Wservent;
    char		Wgetlogin_buffer[128];
    int			Winit_socktype;
    char		Wcrypt_buffer[30];
#    ifdef USE_RTL_THREAD_API
    void *		retv;	/* slot for thread return value */
#    endif
    BOOL               Wuse_showwindow;
    WORD               Wshowwindow;
};

#define HAVE_INTERP_INTERN
typedef struct {
    long	num;
    DWORD	pids[MAXIMUM_WAIT_OBJECTS];
    HANDLE	handles[MAXIMUM_WAIT_OBJECTS];
} child_tab;

#ifdef USE_ITHREADS
typedef struct {
    long	num;
    DWORD	pids[MAXIMUM_WAIT_OBJECTS];
    HANDLE	handles[MAXIMUM_WAIT_OBJECTS];
    HWND	message_hwnds[MAXIMUM_WAIT_OBJECTS];
    char        sigterm[MAXIMUM_WAIT_OBJECTS];
} pseudo_child_tab;
#endif

#ifndef Sighandler_t
typedef Signal_t (*Sighandler_t) (int);
#define Sighandler_t	Sighandler_t
#endif

struct interp_intern {
    char *	perlshell_tokens;
    char **	perlshell_vec;
    long	perlshell_items;
    struct av *	fdpid;
    child_tab *	children;
#ifdef USE_ITHREADS
    DWORD	pseudo_id;
    pseudo_child_tab * pseudo_children;
#endif
    void *	internal_host;
    struct thread_intern	thr_intern;
    HWND        message_hwnd;
    UINT	timerid;
    unsigned 	poll_count;
    Sighandler_t sigtable[SIG_SIZE];
};

#define WIN32_POLL_INTERVAL 32768
#define PERL_ASYNC_CHECK() if (w32_do_async || PL_sig_pending) win32_async_check(aTHX)

#define w32_perlshell_tokens	(PL_sys_intern.perlshell_tokens)
#define w32_perlshell_vec	(PL_sys_intern.perlshell_vec)
#define w32_perlshell_items	(PL_sys_intern.perlshell_items)
#define w32_fdpid		(PL_sys_intern.fdpid)
#define w32_children		(PL_sys_intern.children)
#define w32_num_children	(w32_children->num)
#define w32_child_pids		(w32_children->pids)
#define w32_child_handles	(w32_children->handles)
#define w32_pseudo_id		(PL_sys_intern.pseudo_id)
#define w32_pseudo_children	(PL_sys_intern.pseudo_children)
#define w32_num_pseudo_children		(w32_pseudo_children->num)
#define w32_pseudo_child_pids		(w32_pseudo_children->pids)
#define w32_pseudo_child_handles	(w32_pseudo_children->handles)
#define w32_pseudo_child_message_hwnds	(w32_pseudo_children->message_hwnds)
#define w32_pseudo_child_sigterm	(w32_pseudo_children->sigterm)
#define w32_internal_host		(PL_sys_intern.internal_host)
#define w32_timerid			(PL_sys_intern.timerid)
#define w32_message_hwnd		(PL_sys_intern.message_hwnd)
#define w32_sighandler			(PL_sys_intern.sigtable)
#define w32_poll_count			(PL_sys_intern.poll_count)
#define w32_do_async			(w32_poll_count++ > WIN32_POLL_INTERVAL)
#define w32_strerror_buffer	(PL_sys_intern.thr_intern.Wstrerror_buffer)
#define w32_getlogin_buffer	(PL_sys_intern.thr_intern.Wgetlogin_buffer)
#define w32_crypt_buffer	(PL_sys_intern.thr_intern.Wcrypt_buffer)
#define w32_servent		(PL_sys_intern.thr_intern.Wservent)
#define w32_init_socktype	(PL_sys_intern.thr_intern.Winit_socktype)
#define w32_use_showwindow	(PL_sys_intern.thr_intern.Wuse_showwindow)
#define w32_showwindow	(PL_sys_intern.thr_intern.Wshowwindow)

#ifdef USE_ITHREADS
void win32_wait_for_children(pTHX);
#  define PERL_WAIT_FOR_CHILDREN win32_wait_for_children(aTHX)
#endif

/* The following ioinfo struct manipulations had been removed but were
 * reinstated to fix RT#120091/118059. However, they do not work with
 * the rewritten CRT in VS2015 so they are removed once again for VS2015
 * onwards, which will therefore suffer from the reintroduction of the
 * close socket bug. */
#if (!defined(_MSC_VER)) || (defined(_MSC_VER) && _MSC_VER < 1900)

#ifdef PERL_CORE

/* C doesn't like repeat struct definitions */
#if defined(__MINGW32__) && (__MINGW32_MAJOR_VERSION>=3)
#  undef _CRTIMP
#endif
#ifndef _CRTIMP
#  define _CRTIMP __declspec(dllimport)
#endif


/* VS2005 has multiple ioinfo struct definitions through VS2005's release life
 * VS2008-2012 have been stable but do not assume future VSs will have the
 * same ioinfo struct, just because past struct stability. If research is done
 * on the CRTs of future VSs, the version check can be bumped up so the newer
 * VS uses a fixed ioinfo size. (Actually, only VS2013 (_MSC_VER 1800) hasn't
 * been looked at; after that we cannot use the ioinfo struct anyway (see the
 * #if above).)
 */
#if ! (_MSC_VER < 1400 || (_MSC_VER >= 1500 && _MSC_VER <= 1700) \
  || defined(__MINGW32__))
/* size of ioinfo struct is determined at runtime */
#  define WIN32_DYN_IOINFO_SIZE
#endif

#ifndef WIN32_DYN_IOINFO_SIZE
/*
 * Control structure for lowio file handles
 */
typedef struct {
    intptr_t osfhnd;/* underlying OS file HANDLE */
    char osfile;    /* attributes of file (e.g., open in text mode?) */
    char pipech;    /* one char buffer for handles opened on pipes */
    int lockinitflag;
    CRITICAL_SECTION lock;
/* this struct definition breaks ABI compatibility with
 * not using, cl.exe's native VS version specitfic CRT. */
#  if _MSC_VER >= 1400 && _MSC_VER < 1500
#    error "This ioinfo struct is incomplete for Visual C 2005"
#  endif
/* VS2005 CRT has at least 3 different definitions of this struct based on the
 * CRT DLL's build number. */
#  if _MSC_VER >= 1500
#    ifndef _SAFECRT_IMPL
    /* Not used in the safecrt downlevel. We do not define them, so we cannot
     * use them accidentally */
    char textmode : 7;/* __IOINFO_TM_ANSI or __IOINFO_TM_UTF8 or __IOINFO_TM_UTF16LE */
    char unicode : 1; /* Was the file opened as unicode? */
    char pipech2[2];  /* 2 more peak ahead chars for UNICODE mode */
    __int64 startpos;      /* File position that matches buffer start */
    BOOL utf8translations; /* Buffer contains translations other than CRLF*/
    char dbcsBuffer;       /* Buffer for the lead byte of dbcs when converting from dbcs to unicode */
    BOOL dbcsBufferUsed;   /* Bool for the lead byte buffer is used or not */
#    endif
#  endif
} ioinfo;
#else
typedef intptr_t ioinfo;
#endif

/*
 * Array of arrays of control structures for lowio files.
 */
EXTERN_C _CRTIMP ioinfo* __pioinfo[];

/*
 * Definition of IOINFO_L2E, the log base 2 of the number of elements in each
 * array of ioinfo structs.
 */
#define IOINFO_L2E	    5

/*
 * Definition of IOINFO_ARRAY_ELTS, the number of elements in ioinfo array
 */
#define IOINFO_ARRAY_ELTS   (1 << IOINFO_L2E)

/*
 * Access macros for getting at an ioinfo struct and its fields from a
 * file handle
 */
#ifdef WIN32_DYN_IOINFO_SIZE
#  define _pioinfo(i) ((intptr_t *) \
     (((Size_t)__pioinfo[(i) >> IOINFO_L2E])/* * to head of array ioinfo [] */\
      /* offset to the head of a particular ioinfo struct */ \
      + (((i) & (IOINFO_ARRAY_ELTS - 1)) * w32_ioinfo_size)) \
   )
/* first slice of ioinfo is always the OS handle */
#  define _osfhnd(i)  (*(_pioinfo(i)))
#else
#  define _pioinfo(i) (__pioinfo[(i) >> IOINFO_L2E] + ((i) & (IOINFO_ARRAY_ELTS - 1)))
#  define _osfhnd(i)  (_pioinfo(i)->osfhnd)
#endif

/* since we are not doing a dup2(), this works fine */
#define _set_osfhnd(fh, osfh) (void)(_osfhnd(fh) = (intptr_t)osfh)

#endif /* PERL_CORE */

#endif /* !defined(_MSC_VER) || _MSC_VER<1900 */

/* IO.xs and POSIX.xs define PERLIO_NOT_STDIO to 1 */
#if defined(PERL_EXT_IO) || defined(PERL_EXT_POSIX)
#undef  PERLIO_NOT_STDIO
#endif
#define PERLIO_NOT_STDIO 0

#define EXEC_ARGV_CAST(x) ((const char *const *) x)

DllExport void *win32_signal_context(void);
#define PERL_GET_SIG_CONTEXT win32_signal_context()

#define Win_GetModuleHandle   GetModuleHandle
#define Win_GetProcAddress    GetProcAddress
#define Win_GetModuleFileName GetModuleFileName
#define Win_CreateSemaphore   CreateSemaphore

#if defined(PERL_CORE) && !defined(O_ACCMODE)
#  define O_ACCMODE (O_RDWR | O_WRONLY | O_RDONLY)
#endif

/* ucrt at least seems to allocate a whole bit per type,
   just mask off one bit from the mask for our symlink
   file type.
*/
#define _S_IFLNK ((unsigned)(_S_IFMT ^ (_S_IFMT & -_S_IFMT)))
#undef S_ISLNK
#define S_ISLNK(mode) (((mode) & _S_IFMT) == _S_IFLNK)

/*

The default CRT struct stat uses unsigned short for st_dev and st_ino
which obviously isn't enough, so we define our own structure.

 */

typedef DWORD Dev_t;
typedef unsigned __int64 Ino_t;

struct w32_stat {
    Dev_t st_dev;
    Ino_t st_ino;
    unsigned short st_mode;
    DWORD st_nlink;
    short st_uid;
    short st_gid;
    Dev_t st_rdev;
    Off_t st_size;
    time_t st_atime;
    time_t st_mtime;
    time_t st_ctime;
};

#endif /* _INC_WIN32_PERL5 */