errno.cpp File Reference

#include <corecrt_internal.h>
#include <corecrt_internal_ptd_propagation.h>
#include <errno.h>

Include dependency graph for errno.cpp:

Go to the source code of this file.

Classes
struct	anonymous_namespace{errno.cpp}::errentry

Namespaces
namespace	anonymous_namespace{errno.cpp}

Macros
#define	_ALLOW_OLD_VALIDATE_MACROS
#define	ERRTABLECOUNT   (sizeof(errtable) / sizeof(errtable[0]))
#define	MIN_EXEC_ERROR   ERROR_INVALID_STARTING_CODESEG
#define	MAX_EXEC_ERROR   ERROR_INFLOOP_IN_RELOC_CHAIN
#define	MIN_EACCES_RANGE   ERROR_WRITE_PROTECT
#define	MAX_EACCES_RANGE   ERROR_SHARING_BUFFER_EXCEEDED

Functions
void __cdecl	__acrt_errno_map_os_error (unsigned long const oserrno)
void __cdecl	__acrt_errno_map_os_error_ptd (unsigned long const oserrno, __crt_cached_ptd_host &ptd)
int __cdecl	__acrt_errno_from_os_error (unsigned long const oserrno)
errno_t	_set_errno (int const value)
errno_t	_get_errno (int *const result)
errno_t	_set_doserrno (unsigned long const value)
errno_t	_get_doserrno (unsigned long *const result)
int *__cdecl	_errno ()
unsigned long *__cdecl	__doserrno ()

Variables
static errentry const	errtable []
static int	errno_no_memory {ENOMEM}
static unsigned long	doserrno_no_memory {ERROR_NOT_ENOUGH_MEMORY}

Macro Definition Documentation

_ALLOW_OLD_VALIDATE_MACROS

#define _ALLOW_OLD_VALIDATE_MACROS

Definition at line 8 of file errno.cpp.

ERRTABLECOUNT

#define ERRTABLECOUNT   (sizeof(errtable) / sizeof(errtable[0]))

Definition at line 76 of file errno.cpp.

MAX_EACCES_RANGE

#define MAX_EACCES_RANGE   ERROR_SHARING_BUFFER_EXCEEDED

Definition at line 86 of file errno.cpp.

MAX_EXEC_ERROR

#define MAX_EXEC_ERROR   ERROR_INFLOOP_IN_RELOC_CHAIN

Definition at line 81 of file errno.cpp.

MIN_EACCES_RANGE

#define MIN_EACCES_RANGE   ERROR_WRITE_PROTECT

Definition at line 85 of file errno.cpp.

MIN_EXEC_ERROR

#define MIN_EXEC_ERROR   ERROR_INVALID_STARTING_CODESEG

Definition at line 80 of file errno.cpp.

Function Documentation

__acrt_errno_from_os_error()

int __cdecl __acrt_errno_from_os_error

(

unsigned long const

oserrno

)

Definition at line 103 of file errno.cpp.

{
    // Check the table for the OS error code
    for (unsigned i{0}; i < ERRTABLECOUNT; ++i)
    {
        if (oserrno == errtable[i].oscode)
            return errtable[i].errnocode;
    }
 
    // The error code wasn't in the table.  We check for a range of
    // EACCES errors or exec failure errors (ENOEXEC).  Otherwise
    // EINVAL is returned.
    if (oserrno >= MIN_EACCES_RANGE && oserrno <= MAX_EACCES_RANGE)
    {
        return EACCES;
    }
    else if (oserrno >= MIN_EXEC_ERROR && oserrno <= MAX_EXEC_ERROR)
    {
        return ENOEXEC;
    }
    else
    {
        return EINVAL;
    }
}

Referenced by __acrt_errno_map_os_error(), __acrt_errno_map_os_error_ptd(), and _getdiskfree().

__acrt_errno_map_os_error()

void __cdecl __acrt_errno_map_os_error

(

unsigned long const

oserrno

)

Definition at line 91 of file errno.cpp.

{
    _doserrno = oserrno;
    errno     = __acrt_errno_from_os_error(oserrno);
}

Referenced by __acrt_convert_wcs_mbs_cp(), __acrt_GetModuleFileNameA(), _beginthread(), _beginthreadex(), _cgetws_s(), _chdrive(), _cwait(), _open_osfhandle(), _pipe(), _read_nolock(), _Success_(), _waccess_s(), _wchmod(), _wmkdir(), _wremove(), _wrename(), _wrmdir(), _wsopen_nolock(), __crt_win32_buffer< Character, ResizePolicy >::call_win32_function(), common_stat_handle_file_not_opened(), common_stat_handle_file_opened(), construct_command_line(), construct_environment_block(), execute_command(), get_drive_number_from_path(), locking_nolock(), and throw().

__acrt_errno_map_os_error_ptd()

void __cdecl __acrt_errno_map_os_error_ptd	(	unsigned long const	oserrno,
		__crt_cached_ptd_host &	ptd
	)

Definition at line 97 of file errno.cpp.

{
    ptd.get_doserrno().set(oserrno);
    ptd.get_errno().set(__acrt_errno_from_os_error(oserrno));
}

Referenced by _close_nolock_internal(), _dup2_nolock_internal(), _write_nolock(), common_lseek_do_seek_nolock(), and duplicate_osfhnd().

__doserrno()

unsigned long *__cdecl __doserrno

(

void

)

Definition at line 191 of file errno.cpp.

{
    __acrt_ptd* const ptd{__acrt_getptd_noexit()};
    if (!ptd)
    {
        return &doserrno_no_memory;
    }
 
    return &ptd->_tdoserrno;
}

_errno()

int *__cdecl _errno

(

void

)

Definition at line 180 of file errno.cpp.

{
    __acrt_ptd* const ptd{__acrt_getptd_noexit()};
    if (!ptd)
    {
        return &errno_no_memory;
    }
 
    return &ptd->_terrno;
}

Referenced by _j0(), _j1(), _y0(), _y1(), and _yn().

_get_doserrno()

errno_t _get_doserrno

(

unsigned long *const

result

)

Definition at line 164 of file errno.cpp.

{
    _VALIDATE_RETURN_NOERRNO(result != nullptr, EINVAL);
 
    // Unlike most of our globals, this one is guaranteed to give some answer:
    *result = _doserrno;
    return 0;
}

_get_errno()

errno_t _get_errno

(

int *const

result

)

Definition at line 142 of file errno.cpp.

{
    _VALIDATE_RETURN_NOERRNO(result != nullptr, EINVAL);
 
    // Unlike most of our globals, this one is guaranteed to give some answer
    *result = errno;
    return 0;
}

_set_doserrno()

errno_t _set_doserrno

(

unsigned long const

value

)

Definition at line 154 of file errno.cpp.

{
    __acrt_ptd* const ptd{__acrt_getptd_noexit()};
    if (!ptd)
        return ENOMEM;
 
    _doserrno = value;
    return 0;
}

_set_errno()

errno_t _set_errno

(

int const

value

)

Definition at line 132 of file errno.cpp.

{
    __acrt_ptd* const ptd{__acrt_getptd_noexit()};
    if (!ptd)
        return ENOMEM;
 
    errno = value;
    return 0;
}

Variable Documentation

doserrno_no_memory

unsigned long doserrno_no_memory {ERROR_NOT_ENOUGH_MEMORY}

static

Definition at line 178 of file errno.cpp.

Referenced by __doserrno().

errno_no_memory

int errno_no_memory {ENOMEM}

static

Definition at line 177 of file errno.cpp.

Referenced by _errno().

errtable

errentry const errtable[]

static

Definition at line 26 of file errno.cpp.

Referenced by __acrt_errno_from_os_error().