RtnEnterCriticalLock

RtnEnterCriticalLock waits on the associated CriticalLock until no other thread is inside a RtnEnterCritcalLock RtnLeaveCriticalLock pairing.  If RtnEnterCriticalLock is called for a particular CriticalLock structure, then RtnEnterCriticalLock should not be called again until after RtnLeaveCriticalLock is called. The time spent in a CriticalLock should be as short as possible.

NOTE: CriticalLocks may be used regardless of process or thread context, so they are safe to use in any routine within an RtxTcpIp driver for controlling access to NIC hardware. It is NOT safe to nest CritcalLocks.

Syntax

void RtnEnterCriticalLock(
    CriticalLock *pLock
);

Parameters

pLock

Pointer to a critical lock data structure to wait on.

Return Value

None.

Requirements

Minimum Supported Version	RTX64 2013
Header	rtnapi.h
Library	RtTcpip.lib