---
name: "RtlTryEnterCriticalSection"
section: "3w"
platform: "linux"
package: "libwine-dev"
version: "1.4.1-4"
release: "Debian 7 (Wheezy)"
platforms: ["linux"]
url: "https://new.carta.tech/RtlTryEnterCriticalSection"
---

# RtlTryEnterCriticalSection(3w)

## NAME

**RtlTryEnterCriticalSection** (NTDLL.@)

## SYNOPSIS

BOOL RtlTryEnterCriticalSection\
  (\
   RTL\_CRITICAL\_SECTION\* *crit*\
  )

## DESCRIPTION

Tries to enter a critical section without waiting.

## PARAMS

*crit* **\[In/Out\]**  Critical section to enter.

## RETURNS

**Success:** **TRUE**. The critical section is held by the caller.

**Failure:** **FALSE**. The critical section is currently held by another thread.

## SEE

RtlInitializeCriticalSectionEx(), RtlInitializeCriticalSection(), **[RtlInitializeCriticalSectionAndSpinCount(3w)](/RtlInitializeCriticalSectionAndSpinCount/3w.md)**, RtlDeleteCriticalSection(), **[RtlEnterCriticalSection(3w)](/RtlEnterCriticalSection/3w.md)**, RtlLeaveCriticalSection(), **[RtlSetCriticalSectionSpinCount(3w)](/RtlSetCriticalSectionSpinCount/3w.md)**

## IMPLEMENTATION

Declared in **"winternl.h"**.

Implemented in **"dlls/ntdll/critsection.c"**.

Debug channel **"ntdll"**.