fread-nolock.md

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_fread_nolock	Learn more about: _fread_nolock	4/2/2020	_fread_nolock _o__fread_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	_fread_nolock fread_nolock	reading data [C++], from input streams data [C++], reading from input stream fread_nolock function _fread_nolock function streams [C++], reading data from

_fread_nolock

Reads data from a stream without locking.

Syntax

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

Parameters

buffer
Storage location for data.

size
Item size in bytes.

count
Maximum number of items to be read.

stream
Pointer to the FILE structure.

Return value

See fread.

Remarks

This function is a non-locking version of fread. It's identical to fread 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
_fread_nolock	<stdio.h>

For more compatibility information, see Compatibility.

See also

Stream I/O
fwrite
_read