fwrite-nolock.md

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_fwrite_nolock	Learn more about: _fwrite_nolock	4/2/2020	_fwrite_nolock _o__fwrite_nolock	msvcrt.dll msvcr80.dll msvcr90.dll msvcr100.dll msvcr100_clr0400.dll msvcr110.dll msvcr110_clr0400.dll msvcr120.dll msvcr120_clr0400.dll ucrtbase.dll api-ms-win-crt-stdio-l1-1-0.dll	DLLExport	apiref	_fwrite_nolock fwrite_nolock	fwrite_nolock function streams, writing data to _fwrite_nolock function

_fwrite_nolock

Writes data to a stream without locking.

Syntax

size_t _fwrite_nolock(
   const void *buffer,
   size_t size,
   size_t count,
   FILE *stream
);

Parameters

buffer
Pointer to the data to be written.

size
Item size in bytes.

count
Maximum number of items to be written.

stream
Pointer to the FILE structure.

Return value

Same as fwrite.

Remarks

This function is a non-locking version of fwrite. It's identical to fwrite except that it isn't protected from interference by other threads. It might be faster because it doesn't incur the overhead of locking out other threads. Use this function only in thread-safe contexts such as single-threaded applications or where the calling scope already handles thread isolation.

By default, this function's global state is scoped to the application. To change this behavior, see Global state in the CRT.

Requirements

Function	Required header
_fwrite_nolock	<stdio.h>

For more compatibility information, see Compatibility.

Example

See the example for fread.

See also

Stream I/O
fread
_write