simple_lock_try(9r)simple_lock_try(9r)NAMEsimple_lock_try - General: Tries to assert a simple lock
SYNOPSIS
#include <kern/lock.h>
boolean_t simple_lock_try(
simple_lock_t slock_ptr );
ARGUMENTS
Specifies a pointer to a simple lock structure. You can declare this
simple lock structure by using the decl_simple_lock_data routine.
DESCRIPTION
The simple_lock_try routine tries to assert a lock with read and write
access for the resource associated with the specified simple lock. The
main difference between this routine and simple_lock is that sim‐
ple_lock_try returns immediately if the resource is already locked,
while simple_lock spins until the lock has been obtained. Thus, call
simple_lock_try when you need a simple lock but the code cannot spin
until the lock is obtained.
To release a simple lock successfully asserted by simple_lock_try, call
the simple_unlock routine.
RETURN VALUES
The simple_lock_try routine returns one of the following values: The
simple_lock_try routine successfully asserted the simple lock. The
simple_lock_try routine failed to assert the simple lock.
FILESSEE ALSO
Routines: decl_simple_lock_data(9r), simple_lock(9r), sim‐
ple_lock_init(9r), simple_lock_terminate(9r), simple_unlock(9r)
Data Structures: slock(9s)simple_lock_try(9r)
