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Shell Programming and Scripting
Modifying simple commands to create a script
Post 302120073 by porter on Sunday 3rd of June 2007 04:19:50 PM
06-03-2007
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LEARN ABOUT OSF1
simple_lock
simple_lock(9r) simple_lock(9r) NAME
simple_lock - General: Asserts a simple lock SYNOPSIS
#include <kern/lock.h> void simple_lock( 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 routine asserts a lock with exclusive access for the resource associated with the specified slock structure pointer. This means that no other kernel thread can gain access to the locked resource until you call simple_unlock to release it. Because simple locks are spin locks, simple_lock does not return until the lock has been obtained. NOTES
You must call simple_lock_init (once only) prior to calling simple_lock to initialize the simple lock structure for the resource. A resource, from the kernel module's standpoint, is data that more than one kernel thread can manipulate. You can store the resource in global variables and in data structure members. RETURN VALUES
None FILES
SEE ALSO
Routines: decl_simple_lock_data(9r), simple_lock_init(9r), simple_lock_terminate(9r), simple_lock_try(9r), simple_unlock(9r) Data Structures: slock(9s) simple_lock(9r)