stdio_initializer.cpp File Reference

#include <corecrt_internal.h>

Include dependency graph for stdio_initializer.cpp:

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Functions
int __cdecl	__acrt_initialize_stdio ()
void __cdecl	__acrt_uninitialize_stdio ()
	_CRTALLOC (".CRT$XIC") _PIFV const __acrt_stdio_initializer
	_CRTALLOC (".CRT$XPXA") _PVFV const __acrt_stdio_terminator

Function Documentation

__acrt_initialize_stdio()

int __cdecl __acrt_initialize_stdio

(

)

Definition at line 59 of file _file.cpp.

{
    #ifndef CRTDLL
    // If the user has not supplied a definition of _nstream, set it to _NSTREAM_.
    // If the user has supplied a value that is too small, set _nstream to the
    // minimum acceptable value (_IOB_ENTRIES):
    if (_nstream == 0)
    {
        _nstream = _NSTREAM_;
    }
    else if (_nstream < _IOB_ENTRIES)
    {
        _nstream = _IOB_ENTRIES;
    }
    #endif
 
    // Allocate the __piob array.  Try for _nstream entries first.  If this
    // fails, then reset _nstream to _IOB_ENTRIES an try again.  If it still
    // fails, bail out and cause CRT initialization to fail:
    __piob = _calloc_crt_t(__crt_stdio_stream_data*, _nstream).detach();
    if (!__piob)
    {
        _nstream = _IOB_ENTRIES;
 
        __piob = _calloc_crt_t(__crt_stdio_stream_data*, _nstream).detach();
        if (!__piob)
        {
            return -1;
        }
    }
 
    // Initialize the first _IOB_ENTRIES to point to the corresponding entries
    // in _iob[]:
    for (int i = 0; i != _IOB_ENTRIES; ++i)
    {
        __acrt_InitializeCriticalSectionEx(&_iob[i]._lock, _CORECRT_SPINCOUNT, 0);
        __piob[i] = &_iob[i];
 
        // For stdin, stdout, and stderr, we use _NO_CONSOLE_FILENO to allow
        // callers to distinguish between failure to open a file (-1) and a
        // program run without a console.
        intptr_t const os_handle = _osfhnd(i);
        bool const has_no_console =
            os_handle == reinterpret_cast<intptr_t>(INVALID_HANDLE_VALUE) ||
            os_handle == _NO_CONSOLE_FILENO ||
            os_handle == 0;
 
        if (has_no_console)
        {
            _iob[i]._file = _NO_CONSOLE_FILENO;
        }
    }
 
    return 0;
}

__acrt_uninitialize_stdio()

void __cdecl __acrt_uninitialize_stdio

(

)

Definition at line 120 of file _file.cpp.

{
    _flushall();
    _fcloseall();
 
    for (int i = 0; i != _IOB_ENTRIES; ++i)
    {
        __acrt_stdio_free_buffer_nolock(&__piob[i]->_public_file);
        DeleteCriticalSection(&__piob[i]->_lock);
    }
 
    _free_crt(__piob);
    __piob = nullptr;
}

_CRTALLOC() [1/2]

_CRTALLOC

(

".CRT$XIC"

)

const

_CRTALLOC() [2/2]

_CRTALLOC

(

".CRT$XPXA"

)

const