lock.md

description	title	ms.date	api_name	api_location	api_type	topic_type	f1_keywords	helpviewer_keywords	ms.assetid
Learn more about: _lock	_lock	11/04/2016	_lock	msvcr110_clr0400.dll msvcr120.dll msvcr100.dll msvcr90.dll msvcr80.dll msvcr110.dll msvcrt.dll msvcr120_clr0400.dll	DLLExport	apiref	_lock	lock function _lock function	29f77c37-30de-4b3d-91b6-030216e645a6

_lock

Acquires a multi-thread lock.

Important

This function is obsolete. Beginning in Visual Studio 2015, it is not available in the CRT.

Syntax

void __cdecl _lock
   int locknum
);

Parameters

locknum
[in] The identifier of the lock to acquire.

Remarks

If the lock has already been acquired, this method acquires the lock anyway and causes an internal C run-time (CRT) error. If the method can't acquire a lock, it exits with a fatal error and sets the error code to _RT_LOCK.

Requirements

Source: mlock.c

See also

Alphabetical function reference
_unlock