corecrt_internal_lowio.h File Reference

#include <fcntl.h>
#include <io.h>
#include <corecrt_internal_traits.h>
#include <share.h>
#include <stdint.h>
#include <stdlib.h>

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Classes
struct	__crt_lowio_handle_data

Macros
#define	LF   10 /* line feed */
#define	CR   13 /* carriage return */
#define	CTRLZ   26 /* ctrl-z means eof for text */
#define	_INTERNAL_BUFSIZ   4096
#define	_SMALL_BUFSIZ   512
#define	_msbit(c)   ((c) & 0x80)
#define	_utf8_is_independent(c)   (_msbit(c) == 0)
#define	_utf8_is_leadbyte(c)   (_utf8_no_of_trailbytes(static_cast<const unsigned char>(c)) != 0)
#define	IOINFO_L2E   6
#define	IOINFO_ARRAY_ELTS   (1 << IOINFO_L2E)
#define	IOINFO_ARRAYS   128
#define	_NHANDLE_   (IOINFO_ARRAYS * IOINFO_ARRAY_ELTS)
#define	STDIO_HANDLES_COUNT   3
#define	_pioinfo(i)   (__pioinfo[(i) >> IOINFO_L2E] + ((i) & (IOINFO_ARRAY_ELTS - 1)))
#define	_osfhnd(i)   (_pioinfo(i)->osfhnd)
#define	_osfile(i)   (_pioinfo(i)->osfile)
#define	_pipe_lookahead(i)   (_pioinfo(i)->_pipe_lookahead)
#define	_textmode(i)   (_pioinfo(i)->textmode)
#define	_tm_unicode(i)   (_pioinfo(i)->unicode)
#define	_startpos(i)   (_pioinfo(i)->startpos)
#define	_utf8translations(i)   (_pioinfo(i)->utf8translations)
#define	_mbBuffer(i)   (_pioinfo(i)->mbBuffer)
#define	_dbcsBuffer(i)   (_pioinfo(i)->mbBuffer[0])
#define	_dbcsBufferUsed(i)   (_pioinfo(i)->dbcsBufferUsed)
#define	_pioinfo_safe(i)   ((((i) != -1) && ((i) != -2)) ? _pioinfo(i) : &__badioinfo)
#define	_osfile_safe(i)   (_pioinfo_safe(i)->osfile)
#define	_textmode_safe(i)   (_pioinfo_safe(i)->textmode)
#define	_tm_unicode_safe(i)   (_pioinfo_safe(i)->unicode)
#define	_NO_CONSOLE_FILENO   ((intptr_t)-2)

Typedefs
typedef char	__crt_lowio_pipe_lookahead[3]
typedef __crt_lowio_handle_data *	__crt_lowio_handle_data_array[IOINFO_ARRAYS]

Enumerations
enum class	__crt_lowio_text_mode : char { ansi = 0 , utf8 = 1 , utf16le = 2 }
enum	: unsigned char {   FOPEN = 0x01 , FEOFLAG = 0x02 , FCRLF = 0x04 , FPIPE = 0x08 ,   FNOINHERIT = 0x10 , FAPPEND = 0x20 , FDEV = 0x40 , FTEXT = 0x80 }

Functions
__inline char	_utf8_no_of_trailbytes (const unsigned char c)
int __cdecl	_alloc_osfhnd (void)
int __cdecl	_free_osfhnd (int)
int __cdecl	__acrt_lowio_set_os_handle (int, intptr_t)
	_Success_ (return==0) errno_t __cdecl _sopen_nolock(_Out_ int *_UnlockFlag
	Deletes the virtual mapping and optionally gives back the page & dirty bit.
_Check_return_ __crt_lowio_handle_data *__cdecl	__acrt_lowio_create_handle_array ()
void __cdecl	__acrt_lowio_destroy_handle_array (_Pre_maybenull_ _Post_invalid_ _In_reads_opt_(IOINFO_ARRAY_ELTS) __crt_lowio_handle_data *_Array)
_Check_return_opt_ errno_t __cdecl	__acrt_lowio_ensure_fh_exists (_In_ int _FileHandle)
void __cdecl	__acrt_lowio_lock_fh (_In_ int _FileHandle)
void __cdecl	__acrt_lowio_unlock_fh (_In_ int _FileHandle)
template<typename Action >
auto	__acrt_lowio_lock_fh_and_call (int const fh, Action &&action) -> decltype(action()) throw ()
BOOL __cdecl	__dcrt_lowio_ensure_console_input_initialized (void)
BOOL __cdecl	__dcrt_read_console_input (_Out_ PINPUT_RECORD lpBuffer, _In_ DWORD nLength, _Out_ LPDWORD lpNumberOfEventsRead)
BOOL __cdecl	__dcrt_read_console (_Out_ LPVOID lpBuffer, _In_ DWORD nNumberOfCharsToRead, _Out_ LPDWORD lpNumberOfCharsRead)
BOOL __cdecl	__dcrt_get_number_of_console_input_events (_Out_ LPDWORD lpcNumberOfEvents)
BOOL __cdecl	__dcrt_peek_console_input_a (_Out_ PINPUT_RECORD lpBuffer, _In_ DWORD nLength, _Out_ LPDWORD lpNumberOfEventsRead)
BOOL __cdecl	__dcrt_get_input_console_mode (_Out_ LPDWORD lpMode)
BOOL __cdecl	__dcrt_set_input_console_mode (_In_ DWORD dwMode)
BOOL __cdecl	__dcrt_lowio_ensure_console_output_initialized (void)
BOOL __cdecl	__dcrt_write_console (_In_ void const *lpBuffer, _In_ DWORD nNumberOfCharsToWrite, _Out_ LPDWORD lpNumberOfCharsWritten)
_Check_return_ int __cdecl	_chsize_nolock (_In_ int _FileHandle, _In_ __int64 _Size)
_Check_return_opt_ int __cdecl	_close_nolock (_In_ int _FileHandle)
_Check_return_opt_ long __cdecl	_lseek_nolock (_In_ int _FileHandle, _In_ long _Offset, _In_ int _Origin)
_Check_return_ int __cdecl	_setmode_nolock (_In_ int _FileHandle, _In_ int _Mode)
_Check_return_	_Success_ (return >=0 &&return<=_MaxCharCount) int __cdecl _read_nolock(_In_ int _FileHandle
_Check_return_	_Out_writes_bytes_ (_MaxCharCount) void *_DstBuf
_Check_return_ int __cdecl	_write_nolock (_In_ int _FileHandle, _In_reads_bytes_(_MaxCharCount) const void *_Buf, _In_ unsigned int _MaxCharCount, __crt_cached_ptd_host &_Ptd)
_Check_return_opt_ __int64 __cdecl	_lseeki64_nolock (_In_ int _FileHandle, _In_ __int64 _Offset, _In_ int _Origin)
_Check_return_ int __cdecl	_chsize_nolock_internal (_In_ int _FileHandle, _In_ __int64 _Size, _Inout_ __crt_cached_ptd_host &_Ptd)
_Check_return_opt_ __int64 __cdecl	_lseeki64_nolock_internal (_In_ int _FileHandle, _In_ __int64 _Offset, _In_ int _Origin, _Inout_ __crt_cached_ptd_host &_Ptd)
_Check_return_opt_ int __cdecl	_close_nolock_internal (_In_ int _FileHandle, _Inout_ __crt_cached_ptd_host &_Ptd)
_Check_return_opt_ int __cdecl	_close_internal (_In_ int _FileHandle, _Inout_ __crt_cached_ptd_host &_Ptd)
_Check_return_opt_ long __cdecl	_lseek_internal (_In_ int _FileHandle, _In_ long _Offset, _In_ int _Origin, _Inout_ __crt_cached_ptd_host &_Ptd)
_Check_return_opt_ __int64 __cdecl	_lseeki64_internal (_In_ int _FileHandle, _In_ __int64 _Offset, _In_ int _Origin, _Inout_ __crt_cached_ptd_host &_Ptd)
int __cdecl	_write_internal (_In_ int _FileHandle, _In_reads_bytes_(_MaxCharCount) void const *_Buf, _In_ unsigned int _MaxCharCount, _Inout_ __crt_cached_ptd_host &_Ptd)

Variables
char	_lookuptrailbytes [256]
__crt_lowio_handle_data	__badioinfo
int	_umaskval
__crt_lowio_handle_data_array	__pioinfo
int	_nhandle
_Out_ int *	_FileHandle
_Out_ int _In_z_ char const *	_FileName
_Out_ int _In_z_ char const _In_ int	_OpenFlag
_Out_ int _In_z_ char const _In_ int _In_ int	_ShareFlag
_Out_ int _In_z_ char const _In_ int _In_ int _In_ int	_PermissionFlag
_Out_ int _In_z_ char const _In_ int _In_ int _In_ int _In_ int	_SecureFlag
const HANDLE	_console_invalid_handle = reinterpret_cast<HANDLE>(-1)
const HANDLE	_console_uninitialized_handle = reinterpret_cast<HANDLE>(-2)
_Check_return_ _In_ unsigned int	_MaxCharCount

Macro Definition Documentation

_dbcsBuffer

#define _dbcsBuffer

(

i

)

(_pioinfo(i)->mbBuffer[0])

Definition at line 138 of file corecrt_internal_lowio.h.

_dbcsBufferUsed

#define _dbcsBufferUsed

(

i

)

(_pioinfo(i)->dbcsBufferUsed)

Definition at line 139 of file corecrt_internal_lowio.h.

_INTERNAL_BUFSIZ

#define _INTERNAL_BUFSIZ   4096

Definition at line 27 of file corecrt_internal_lowio.h.

_mbBuffer

#define _mbBuffer

(

i

)

(_pioinfo(i)->mbBuffer)

Definition at line 137 of file corecrt_internal_lowio.h.

_msbit

#define _msbit

(

c

)

((c) & 0x80)

Definition at line 31 of file corecrt_internal_lowio.h.

_NHANDLE_

#define _NHANDLE_   (IOINFO_ARRAYS * IOINFO_ARRAY_ELTS)

Definition at line 120 of file corecrt_internal_lowio.h.

_NO_CONSOLE_FILENO

#define _NO_CONSOLE_FILENO   ((intptr_t)-2)

Definition at line 325 of file corecrt_internal_lowio.h.

_osfhnd

#define _osfhnd

(

i

)

(_pioinfo(i)->osfhnd)

Definition at line 130 of file corecrt_internal_lowio.h.

_osfile

#define _osfile

(

i

)

(_pioinfo(i)->osfile)

Definition at line 131 of file corecrt_internal_lowio.h.

_osfile_safe

#define _osfile_safe

(

i

)

(_pioinfo_safe(i)->osfile)

Definition at line 146 of file corecrt_internal_lowio.h.

_pioinfo

#define _pioinfo

(

i

)

(__pioinfo[(i) >> IOINFO_L2E] + ((i) & (IOINFO_ARRAY_ELTS - 1)))

Definition at line 129 of file corecrt_internal_lowio.h.

_pioinfo_safe

#define _pioinfo_safe

(

i

)

((((i) != -1) && ((i) != -2)) ? _pioinfo(i) : &__badioinfo)

Definition at line 145 of file corecrt_internal_lowio.h.

_pipe_lookahead

#define _pipe_lookahead

(

i

)

(_pioinfo(i)->_pipe_lookahead)

Definition at line 132 of file corecrt_internal_lowio.h.

_SMALL_BUFSIZ

#define _SMALL_BUFSIZ   512

Definition at line 28 of file corecrt_internal_lowio.h.

_startpos

#define _startpos

(

i

)

(_pioinfo(i)->startpos)

Definition at line 135 of file corecrt_internal_lowio.h.

_textmode

#define _textmode

(

i

)

(_pioinfo(i)->textmode)

Definition at line 133 of file corecrt_internal_lowio.h.

_textmode_safe

#define _textmode_safe

(

i

)

(_pioinfo_safe(i)->textmode)

Definition at line 147 of file corecrt_internal_lowio.h.

_tm_unicode

#define _tm_unicode

(

i

)

(_pioinfo(i)->unicode)

Definition at line 134 of file corecrt_internal_lowio.h.

_tm_unicode_safe

#define _tm_unicode_safe

(

i

)

(_pioinfo_safe(i)->unicode)

Definition at line 148 of file corecrt_internal_lowio.h.

_utf8_is_independent

#define _utf8_is_independent

(

c

)

(_msbit(c) == 0)

Definition at line 34 of file corecrt_internal_lowio.h.

_utf8_is_leadbyte

#define _utf8_is_leadbyte

(

c

)

(_utf8_no_of_trailbytes(static_cast<const unsigned char>(c)) != 0)

Definition at line 67 of file corecrt_internal_lowio.h.

_utf8translations

#define _utf8translations

(

i

)

(_pioinfo(i)->utf8translations)

Definition at line 136 of file corecrt_internal_lowio.h.

CR

#define CR   13 /* carriage return */

Definition at line 23 of file corecrt_internal_lowio.h.

CTRLZ

#define CTRLZ   26 /* ctrl-z means eof for text */

Definition at line 24 of file corecrt_internal_lowio.h.

IOINFO_ARRAY_ELTS

#define IOINFO_ARRAY_ELTS   (1 << IOINFO_L2E)

Definition at line 114 of file corecrt_internal_lowio.h.

IOINFO_ARRAYS

#define IOINFO_ARRAYS   128

Definition at line 117 of file corecrt_internal_lowio.h.

IOINFO_L2E

#define IOINFO_L2E   6

Definition at line 111 of file corecrt_internal_lowio.h.

LF

#define LF   10 /* line feed */

Definition at line 22 of file corecrt_internal_lowio.h.

STDIO_HANDLES_COUNT

#define STDIO_HANDLES_COUNT   3

Definition at line 124 of file corecrt_internal_lowio.h.

Typedef Documentation

__crt_lowio_handle_data_array

typedef __crt_lowio_handle_data* __crt_lowio_handle_data_array[IOINFO_ARRAYS]

Definition at line 150 of file corecrt_internal_lowio.h.

__crt_lowio_pipe_lookahead

typedef char __crt_lowio_pipe_lookahead[3]

Definition at line 89 of file corecrt_internal_lowio.h.

Enumeration Type Documentation

anonymous enum

anonymous enum : unsigned char

Enumerator
FOPEN
FEOFLAG
FCRLF
FPIPE
FNOINHERIT
FAPPEND
FDEV
FTEXT

Definition at line 77 of file corecrt_internal_lowio.h.

{
    FOPEN      = 0x01, // file handle open
    FEOFLAG    = 0x02, // end of file has been encountered
    FCRLF      = 0x04, // CR-LF across read buffer (in text mode)
    FPIPE      = 0x08, // file handle refers to a pipe
    FNOINHERIT = 0x10, // file handle opened _O_NOINHERIT
    FAPPEND    = 0x20, // file handle opened O_APPEND
    FDEV       = 0x40, // file handle refers to device
    FTEXT      = 0x80, // file handle is in text mode
};

__crt_lowio_text_mode

enum class __crt_lowio_text_mode : char

strong

Enumerator
ansi
utf8
utf16le

Definition at line 69 of file corecrt_internal_lowio.h.

{
    ansi    = 0, // Regular text
    utf8    = 1, // UTF-8 encoded
    utf16le = 2, // UTF-16LE encoded
};

Function Documentation

__acrt_lowio_create_handle_array()

_Check_return_ __crt_lowio_handle_data *__cdecl __acrt_lowio_create_handle_array

(

)

Definition at line 13 of file osfinfo.cpp.

{
    __crt_unique_heap_ptr<__crt_lowio_handle_data> array(_calloc_crt_t(
        __crt_lowio_handle_data,
        IOINFO_ARRAY_ELTS));
 
    if (!array)
        return nullptr;
 
    __crt_lowio_handle_data* const first = array.get();
    __crt_lowio_handle_data* const last  = first + IOINFO_ARRAY_ELTS;
    for (auto it = first; it != last; ++it)
    {
        __acrt_InitializeCriticalSectionEx(&it->lock, _CORECRT_SPINCOUNT, 0);
        it->osfhnd             = reinterpret_cast<intptr_t>(INVALID_HANDLE_VALUE);
        it->startpos           = 0;
        it->osfile             = 0;
        it->textmode           = __crt_lowio_text_mode::ansi;
        it->_pipe_lookahead[0] = LF;
        it->_pipe_lookahead[1] = LF;
        it->_pipe_lookahead[2] = LF;
        it->unicode            = false;
        it->utf8translations   = false;
        it->dbcsBufferUsed     = false;
        for (int i = 0; i < sizeof(it->mbBuffer); ++i)
        {
            it->mbBuffer[i] = '\0';
        }
    }
 
    return array.detach();
}

Referenced by __acrt_lowio_ensure_fh_exists(), and _alloc_osfhnd().

__acrt_lowio_destroy_handle_array()

void __cdecl __acrt_lowio_destroy_handle_array

(

_Pre_maybenull_ _Post_invalid_ _In_reads_opt_(IOINFO_ARRAY_ELTS) __crt_lowio_handle_data *

_Array

)

Referenced by __acrt_uninitialize_lowio().

__acrt_lowio_ensure_fh_exists()

_Check_return_opt_ errno_t __cdecl __acrt_lowio_ensure_fh_exists

(

_In_ int

_FileHandle

)

Referenced by __acrt_initialize_lowio(), _dup2_internal(), and initialize_inherited_file_handles_nolock().

__acrt_lowio_lock_fh()

void __cdecl __acrt_lowio_lock_fh

(

_In_ int

_FileHandle

)

Referenced by __acrt_lowio_lock_fh_and_call(), _dup2_internal(), _locking(), _perror_internal(), _read(), _setmode(), _Success_(), _write_internal(), and common_lseek().

__acrt_lowio_lock_fh_and_call()

template<typename Action >

auto __acrt_lowio_lock_fh_and_call	(	int const	fh,
		Action &&	action
	)		-> decltype(action())
throw	(
	)

Definition at line 221 of file corecrt_internal_lowio.h.

    {
        return __crt_seh_guarded_call<decltype(action())>()(
            [fh]() { __acrt_lowio_lock_fh(fh); },
            action,
            [fh]() { __acrt_lowio_unlock_fh(fh); });
    }

Referenced by _chsize_s_internal(), _close_internal(), _commit(), _dup_internal(), _eof(), and common_fstat().

__acrt_lowio_set_os_handle()

int __cdecl __acrt_lowio_set_os_handle	(	int	fh,
		intptr_t	value
	)

Definition at line 195 of file osfinfo.cpp.

{
    if (fh >= 0 &&
        static_cast<unsigned>(fh) < static_cast<unsigned>(_nhandle) &&
        _osfhnd(fh) == reinterpret_cast<intptr_t>(INVALID_HANDLE_VALUE))
    {
        if (_query_app_type() == _crt_console_app)
        {
            HANDLE const handle_value = reinterpret_cast<HANDLE>(value);
            switch (fh)
            {
            case 0: SetStdHandle(STD_INPUT_HANDLE,  handle_value); break;
            case 1: SetStdHandle(STD_OUTPUT_HANDLE, handle_value); break;
            case 2: SetStdHandle(STD_ERROR_HANDLE,  handle_value); break;
            }
        }
 
        _osfhnd(fh) = value;
        return 0 ;
    }
    else
    {
        errno = EBADF; // Bad handle
        _doserrno = 0; // This is not an OS error
        return -1;
    }
}

Referenced by _dup2_nolock_internal(), _open_osfhandle(), _pipe(), _wsopen_nolock(), and duplicate_osfhnd().

__acrt_lowio_unlock_fh()

void __cdecl __acrt_lowio_unlock_fh

(

_In_ int

_FileHandle

)

Referenced by __acrt_lowio_lock_fh_and_call(), _dup2_internal(), _dup_nolock_internal(), _locking(), _perror_internal(), _pipe(), _read(), _setmode(), _Success_(), _write_internal(), common_lseek(), common_open(), and common_sopen_dispatch().

__dcrt_get_input_console_mode()

BOOL __cdecl __dcrt_get_input_console_mode

(

_Out_ LPDWORD

lpMode

)

Definition at line 136 of file initconin.cpp.

{
    return console_input_reopen_and_retry(
        [lpMode]()
        {
            return ::GetConsoleMode(
                __dcrt_lowio_console_input_handle,
                lpMode
                );
        });
}

Referenced by _cgetws_s(), _getch_nolock(), and _getwch_nolock().

__dcrt_get_number_of_console_input_events()

BOOL __cdecl __dcrt_get_number_of_console_input_events

(

_Out_ LPDWORD

lpcNumberOfEvents

)

Definition at line 104 of file initconin.cpp.

{
    return console_input_reopen_and_retry(
        [lpcNumberOfEvents]()
        {
            return ::GetNumberOfConsoleInputEvents(
                __dcrt_lowio_console_input_handle,
                lpcNumberOfEvents
                );
        });
}

Referenced by _kbhit_nolock().

__dcrt_lowio_ensure_console_input_initialized()

BOOL __cdecl __dcrt_lowio_ensure_console_input_initialized

(

void

)

Definition at line 31 of file initconin.cpp.

{
    if (__dcrt_lowio_console_input_handle == _console_uninitialized_handle)
    {
        __dcrt_lowio_initialize_console_input();
    }
 
    if (__dcrt_lowio_console_input_handle == _console_invalid_handle)
    {
        return FALSE;
    }
    return TRUE;
}

Referenced by _cgetws_s(), _getch_nolock(), _getwch_nolock(), and _kbhit_nolock().

__dcrt_lowio_ensure_console_output_initialized()

BOOL __cdecl __dcrt_lowio_ensure_console_output_initialized

(

void

)

Definition at line 31 of file initcon.cpp.

{
    if (__dcrt_lowio_console_output_handle == _console_uninitialized_handle)
    {
        __dcrt_lowio_initialize_console_output();
    }
 
    if (__dcrt_lowio_console_output_handle == _console_invalid_handle)
    {
        return FALSE;
    }
    return TRUE;
}

Referenced by _cputws(), and _putwch_nolock().

__dcrt_peek_console_input_a()

BOOL __cdecl __dcrt_peek_console_input_a	(	_Out_ PINPUT_RECORD	lpBuffer,
		_In_ DWORD	nLength,
		_Out_ LPDWORD	lpNumberOfEventsRead
	)

Definition at line 118 of file initconin.cpp.

{
    return console_input_reopen_and_retry(
        [lpBuffer, nLength, lpNumberOfEventsRead]()
        {
            return ::PeekConsoleInputA(
                __dcrt_lowio_console_input_handle,
                lpBuffer,
                nLength,
                lpNumberOfEventsRead
                );
        });
}

Referenced by _kbhit_nolock().

__dcrt_read_console()

BOOL __cdecl __dcrt_read_console	(	_Out_ LPVOID	lpBuffer,
		_In_ DWORD	nNumberOfCharsToRead,
		_Out_ LPDWORD	lpNumberOfCharsRead
	)

Definition at line 85 of file initconin.cpp.

{
    return console_input_reopen_and_retry(
        [lpBuffer, nNumberOfCharsToRead, lpNumberOfCharsRead]()
        {
            return ::ReadConsoleW(
                __dcrt_lowio_console_input_handle,
                lpBuffer,
                nNumberOfCharsToRead,
                lpNumberOfCharsRead,
                nullptr
                );
        });
}

Referenced by _cgetws_s().

__dcrt_read_console_input()

BOOL __cdecl __dcrt_read_console_input	(	_Out_ PINPUT_RECORD	lpBuffer,
		_In_ DWORD	nLength,
		_Out_ LPDWORD	lpNumberOfEventsRead
	)

Definition at line 67 of file initconin.cpp.

{
    return console_input_reopen_and_retry(
        [lpBuffer, nLength, lpNumberOfEventsRead]()
        {
            return ::ReadConsoleInputW(
                __dcrt_lowio_console_input_handle,
                lpBuffer,
                nLength,
                lpNumberOfEventsRead
                );
        });
}

Referenced by _getch_nolock(), and _getwch_nolock().

__dcrt_set_input_console_mode()

BOOL __cdecl __dcrt_set_input_console_mode

(

_In_ DWORD

dwMode

)

Definition at line 150 of file initconin.cpp.

{
    return console_input_reopen_and_retry(
        [dwMode]()
        {
            return ::SetConsoleMode(
                __dcrt_lowio_console_input_handle,
                dwMode
                );
        });
}

Referenced by _cgetws_s(), _getch_nolock(), and _getwch_nolock().

__dcrt_write_console()

BOOL __cdecl __dcrt_write_console	(	_In_ void const *	lpBuffer,
		_In_ DWORD	nNumberOfCharsToWrite,
		_Out_ LPDWORD	lpNumberOfCharsWritten
	)

Definition at line 67 of file initcon.cpp.

{
    return console_output_reopen_and_retry(
        [lpBuffer, nNumberOfCharsToWrite, lpNumberOfCharsWritten]()
        {
            return ::WriteConsoleW(
                __dcrt_lowio_console_output_handle,
                lpBuffer,
                nNumberOfCharsToWrite,
                lpNumberOfCharsWritten,
                nullptr);
        });
}

Referenced by _cputws(), and _putwch_nolock().

_alloc_osfhnd()

int __cdecl _alloc_osfhnd

(

void

)

Definition at line 116 of file osfinfo.cpp.

{
    __acrt_lock(__acrt_lowio_index_lock);
    int result = -1;
    __try
    {
        // Search the arrays of file objects, in order, looking for the first
        // free entry.  The compound index of this free entry is the return
        // value.
        //
        // The compound index of the file object entry *(__pioinfo[i] + j) is
        // k = i * IOINFO_ARRAY_ELTS + j.
        for (int i = 0; i < IOINFO_ARRAYS; ++i)
        {
            // If this __crt_lowio_handle_data array does not yet exist, create a new one:
            if (!__pioinfo[i])
            {
                __pioinfo[i] = __acrt_lowio_create_handle_array();
                if (!__pioinfo[i])
                    __leave;
 
                _nhandle += IOINFO_ARRAY_ELTS;
 
                // The first element of the newly allocated array of handle data
                // objects is our first free entry.  Note that since we hold the
                // index lock, no one else can allocate this handle.
                int const fh = i * IOINFO_ARRAY_ELTS;
 
                __acrt_lowio_lock_fh(fh);
                _osfile(fh) = FOPEN;
                result = fh;
                __leave;
            }
 
            // Otherwise, this file object array already exists.  Search it looking
            // for the first free entry:
            __crt_lowio_handle_data* const first = __pioinfo[i];
            __crt_lowio_handle_data* const last  = first + IOINFO_ARRAY_ELTS;
            for (__crt_lowio_handle_data* pio = first; pio != last; ++pio)
            {
                if (pio->osfile & FOPEN)
                    continue;
 
                // Another thread may have grabbed this file handle out from
                // under us while we waited for the lock.  If so, continue on
                // searching through the array.
                //
                // CRT_REFACTOR TODO:  Resolve lowio synchronization issues.
                EnterCriticalSection(&pio->lock);
                if ((pio->osfile & FOPEN) != 0)
                {
                    LeaveCriticalSection(&pio->lock);
                    continue;
                }
 
                // Otherwise, this entry is ours:  we hold the lock, so we can
                // initialize it and return its handle:
                int const fh = i * IOINFO_ARRAY_ELTS + static_cast<int>(pio - first);
                _osfile(fh) = FOPEN;
                _osfhnd(fh) = reinterpret_cast<intptr_t>(INVALID_HANDLE_VALUE);
                result = fh;
                __leave;
            }
        }
 
        // All entries are in use if we fall out of the loop.  return -1 in this case (which result is already set to)
    }
    __finally
    {
        __acrt_unlock(__acrt_lowio_index_lock);
    }
    __endtry
    return result;
}

Referenced by _dup_nolock_internal(), _open_osfhandle(), _pipe(), and _wsopen_nolock().

_chsize_nolock()

_Check_return_ int __cdecl _chsize_nolock	(	_In_ int	_FileHandle,
		_In_ __int64	_Size
	)

Referenced by truncate_ctrl_z_if_present().

_chsize_nolock_internal()

_Check_return_ int __cdecl _chsize_nolock_internal	(	_In_ int	_FileHandle,
		_In_ __int64	_Size,
		_Inout_ __crt_cached_ptd_host &	_Ptd
	)

_close_internal()

_Check_return_opt_ int __cdecl _close_internal	(	_In_ int	_FileHandle,
		_Inout_ __crt_cached_ptd_host &	_Ptd
	)

Referenced by _fclose_nolock_internal().

_close_nolock()

_Check_return_opt_ int __cdecl _close_nolock

(

_In_ int

_FileHandle

)

Referenced by _wsopen_nolock().

_close_nolock_internal()

_Check_return_opt_ int __cdecl _close_nolock_internal	(	_In_ int	_FileHandle,
		_Inout_ __crt_cached_ptd_host &	_Ptd
	)

Referenced by _dup2_nolock_internal().

_free_osfhnd()

int __cdecl _free_osfhnd

(

int

fh

)

Definition at line 227 of file osfinfo.cpp.

{
    if (fh >= 0 &&
        static_cast<unsigned>(fh) < static_cast<unsigned>(_nhandle) &&
        (_osfile(fh) & FOPEN) &&
        _osfhnd(fh) != reinterpret_cast<intptr_t>(INVALID_HANDLE_VALUE))
    {
        if (_query_app_type() == _crt_console_app)
        {
            switch (fh)
            {
            case 0: SetStdHandle(STD_INPUT_HANDLE,  nullptr); break;
            case 1: SetStdHandle(STD_OUTPUT_HANDLE, nullptr); break;
            case 2: SetStdHandle(STD_ERROR_HANDLE,  nullptr); break;
            }
        }
 
        _osfhnd(fh) = reinterpret_cast<intptr_t>(INVALID_HANDLE_VALUE);
        return 0;
    }
    else
    {
        errno = EBADF; // Bad handle
        _doserrno = 0; // This is not an OS error
        return -1;
    }
}

Referenced by _close_nolock_internal(), and _wsopen_nolock().

_lseek_internal()

_Check_return_opt_ long __cdecl _lseek_internal	(	_In_ int	_FileHandle,
		_In_ long	_Offset,
		_In_ int	_Origin,
		_Inout_ __crt_cached_ptd_host &	_Ptd
	)

Referenced by _rewind_internal().

_lseek_nolock()

_Check_return_opt_ long __cdecl _lseek_nolock	(	_In_ int	_FileHandle,
		_In_ long	_Offset,
		_In_ int	_Origin
	)

_lseeki64_internal()

_Check_return_opt_ __int64 __cdecl _lseeki64_internal	(	_In_ int	_FileHandle,
		_In_ __int64	_Offset,
		_In_ int	_Origin,
		_Inout_ __crt_cached_ptd_host &	_Ptd
	)

Referenced by common_ftell_nolock(), common_ftell_read_mode_nolock(), and common_ftell_translated_utf8_nolock().

_lseeki64_nolock()

_Check_return_opt_ __int64 __cdecl _lseeki64_nolock	(	_In_ int	_FileHandle,
		_In_ __int64	_Offset,
		_In_ int	_Origin
	)

Referenced by _chsize_nolock_internal(), _eof(), _read_nolock(), common_fseek_binary_mode_read_only_fast_track_nolock(), configure_text_mode(), locking_nolock(), throw(), translate_text_mode_nolock(), truncate_ctrl_z_if_present(), and __crt_seek_guard::~__crt_seek_guard().

_lseeki64_nolock_internal()

_Check_return_opt_ __int64 __cdecl _lseeki64_nolock_internal	(	_In_ int	_FileHandle,
		_In_ __int64	_Offset,
		_In_ int	_Origin,
		_Inout_ __crt_cached_ptd_host &	_Ptd
	)

Referenced by _write_nolock(), and common_fseek_nolock().

_Out_writes_bytes_()

_Check_return_ _Out_writes_bytes_

(

_MaxCharCount

)

_setmode_nolock()

_Check_return_ int __cdecl _setmode_nolock	(	_In_ int	_FileHandle,
		_In_ int	_Mode
	)

Referenced by _chsize_nolock_internal().

_Success_() [1/2]

_Check_return_ _Success_

(

return >=0 &&return<=

_MaxCharCount

)

_Success_() [2/2]

_Success_

(

return

= = 0

)

Deletes the virtual mapping and optionally gives back the page & dirty bit.

Parameters

Process	- The process this address belongs to, or NULL if system address.
Address	- The address to unmap.
WasDirty	- Optional param receiving the dirty bit of the PTE.
Page	- Optional param receiving the page number previously mapped to this address.

Returns

Whether there was actually a page mapped at the given address.

Definition at line 57 of file firmware.c.

{
    NTSTATUS Status;
    SYSTEM_BOOT_ENVIRONMENT_INFORMATION BootInfo;
 
    /* Check input parameters */
    if (FirmwareType == NULL)
    {
        SetLastError(ERROR_INVALID_PARAMETER);
        return FALSE;
    }
 
    /* Query firmware type */
    Status = NtQuerySystemInformation(SystemBootEnvironmentInformation,
                                      &BootInfo,
                                      sizeof(BootInfo),
                                      0);
    if (!NT_SUCCESS(Status))
    {
        BaseSetLastNTError(Status);
        return FALSE;
    }
 
    *FirmwareType = BootInfo.FirmwareType;
    return TRUE;
}

_utf8_no_of_trailbytes()

__inline char _utf8_no_of_trailbytes

(

const unsigned char

c

)

Definition at line 45 of file corecrt_internal_lowio.h.

{
    return _lookuptrailbytes[c];
}

Referenced by common_ftell_translated_utf8_nolock(), throw(), and write_double_translated_ansi_nolock().

_write_internal()

int __cdecl _write_internal	(	_In_ int	_FileHandle,
		_In_reads_bytes_(_MaxCharCount) void const *	_Buf,
		_In_ unsigned int	_MaxCharCount,
		_Inout_ __crt_cached_ptd_host &	_Ptd
	)

Referenced by __acrt_stdio_flush_nolock(), _fwrite_nolock_internal(), and write_buffer_nolock().

_write_nolock()

_Check_return_ int __cdecl _write_nolock	(	_In_ int	_FileHandle,
		_In_reads_bytes_(_MaxCharCount) const void *	_Buf,
		_In_ unsigned int	_MaxCharCount,
		__crt_cached_ptd_host &	_Ptd
	)

Referenced by _chsize_nolock_internal(), and _perror_internal().

Variable Documentation

__badioinfo

__crt_lowio_handle_data __badioinfo

extern

Definition at line 126 of file file.c.

Referenced by _dup2(), _setmode(), get_ioinfo(), get_ioinfo_alloc(), get_ioinfo_alloc_fd(), get_ioinfo_nolock(), msvcrt_alloc_fd(), msvcrt_free_fd(), msvcrt_init_io(), and release_ioinfo().

__pioinfo

__crt_lowio_handle_data_array __pioinfo

extern

Definition at line 121 of file file.c.

Referenced by __acrt_uninitialize_lowio().

_console_invalid_handle

const HANDLE _console_invalid_handle = reinterpret_cast<HANDLE>(-1)

Definition at line 233 of file corecrt_internal_lowio.h.

Referenced by __dcrt_lowio_ensure_console_input_initialized(), __dcrt_lowio_ensure_console_output_initialized(), __dcrt_terminate_console_input(), and __dcrt_terminate_console_output().

_console_uninitialized_handle

const HANDLE _console_uninitialized_handle = reinterpret_cast<HANDLE>(-2)

Definition at line 234 of file corecrt_internal_lowio.h.

Referenced by __dcrt_lowio_ensure_console_input_initialized(), __dcrt_lowio_ensure_console_output_initialized(), __dcrt_terminate_console_input(), and __dcrt_terminate_console_output().

_FileHandle

_Out_ int * _FileHandle

Definition at line 183 of file corecrt_internal_lowio.h.

Referenced by _futime(), and _wsopen_dispatch().

_FileName

_Out_ int _In_z_ wchar_t const* _FileName

Definition at line 184 of file corecrt_internal_lowio.h.

_lookuptrailbytes

char _lookuptrailbytes[256]

extern

Definition at line 20 of file read.cpp.

Referenced by _utf8_no_of_trailbytes().

_MaxCharCount

_Check_return_ _In_ unsigned int _MaxCharCount

Definition at line 280 of file corecrt_internal_lowio.h.

_nhandle

int _nhandle

extern

Definition at line 34 of file ioinit.cpp.

Referenced by __acrt_lowio_ensure_fh_exists(), __acrt_lowio_set_os_handle(), _alloc_osfhnd(), _chsize_s_internal(), _close_internal(), _commit(), _dup2_internal(), _dup_internal(), _eof(), _free_osfhnd(), _get_osfhandle(), _isatty(), _locking(), _read(), _read_nolock(), _setmode(), _Success_(), _write_internal(), accumulate_inheritable_handles(), common_fdopen(), common_fstat(), common_futime(), common_lseek(), and initialize_inherited_file_handles_nolock().

_OpenFlag

_Out_ int _In_z_ wchar_t const _In_ int _OpenFlag

Definition at line 185 of file corecrt_internal_lowio.h.

_PermissionFlag

_Out_ int _In_z_ wchar_t const _In_ int _In_ int _In_ int _PermissionFlag

Definition at line 187 of file corecrt_internal_lowio.h.

_SecureFlag

_Out_ int _In_z_ wchar_t const _In_ int _In_ int _In_ int _In_ int _SecureFlag

Definition at line 188 of file corecrt_internal_lowio.h.

_ShareFlag

_Out_ int _In_z_ wchar_t const _In_ int _In_ int _ShareFlag

Definition at line 186 of file corecrt_internal_lowio.h.

_umaskval

int _umaskval

extern

Definition at line 15 of file umask.cpp.

Referenced by _umask_s(), and decode_options().