_getbuf.cpp File Reference

#include <corecrt_internal_stdio.h>

Include dependency graph for _getbuf.cpp:

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Functions
void __cdecl	__acrt_stdio_allocate_buffer_nolock (FILE *const public_stream)

Function Documentation

__acrt_stdio_allocate_buffer_nolock()

void __cdecl __acrt_stdio_allocate_buffer_nolock

(

FILE *const

public_stream

)

Definition at line 16 of file _getbuf.cpp.

{
    _ASSERTE(public_stream != nullptr);
 
    __crt_stdio_stream const stream(public_stream);
 
    #ifndef CRTDLL
    ++_cflush; // Force the library pre-termination procedure to run
    #endif
 
    // Try to get a big buffer:
    stream->_base = _calloc_crt_t(char, _INTERNAL_BUFSIZ).detach();
    if (stream->_base != nullptr)
    {
        stream.set_flags(_IOBUFFER_CRT);
        stream->_bufsiz = _INTERNAL_BUFSIZ;
    }
    // If we couldn't get a big buffer, use single character buffering:
    else
    {
        stream.set_flags(_IOBUFFER_NONE);
        stream->_base = reinterpret_cast<char *>(&stream->_charbuf);
        stream->_bufsiz = 2;
    }
 
    stream->_ptr = stream->_base;
    stream->_cnt = 0;
}

Referenced by __DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_0(), _ungetc_nolock(), _ungetwc_nolock(), common_flush_and_write_nolock(), and common_refill_and_read_nolock().