RW_TRYRDLOCK(D3)RW_TRYRDLOCK(D3)NAMERW_TRYRDLOCK - try to acquire a read/write lock in read mode
SYNOPSIS
#include <sys/ksynch.h>
#include <sys/ddi.h>
boolean_t RW_TRYRDLOCK(rwlock_t *lockp);
Arguments
lockp Pointer to the read/write lock to be acquired.
DESCRIPTION
If the lock specified by lockp is immediately available (can be acquired
in read mode without sleeping) the RW_TRYRDLOCK function acquires the
lock. If the lock is not immediately available, RW_TRYRDLOCK returns
without acquiring the lock.
Return Values
RW_TRYRDLOCK returns TRUE (a non-zero value) if the lock is successfully
acquired or FALSE (zero) if the lock is not acquired.
USAGE
Level
Base or Interrupt.
Synchronization Constraints
Does not sleep.
Driver-defined basic locks, and sleeping locks may be held across calls
to this function.
REFERENCESRW_ALLOC(D3), RW_INIT(D3), RW_DEALLOC(D3), RW_DESTROY(D3), RW_RDLOCK(D3),
RW_WRLOCK(D3), RW_TRYWRLOCK(D3), RW_UNLOCK(D3)
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