osf1 man page for lock_write

Query: lock_write

OS: osf1

Section: 9r

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

lock_write(9r)															    lock_write(9r)

NAME
lock_write - Asserts a complex lock with write access
SYNOPSIS
#include <kern/lock.h> void lock_write( lock_t lock_structptr );
ARGUMENTS
Specifies a pointer to the complex lock structure, lock. This is the lock structure associated with the resource on which you want to assert a complex lock with write access. The lock structure is an opaque data structure; that is, its associated members are referenced and manipulated by the operating system and not by the user of the complex lock mechanism.
DESCRIPTION
The lock_write routine asserts a lock with exclusive write access for the resource associated with the specified lock structure pointer. This means that once a write lock is asserted, no other kernel thread can gain read or write access to the resource until it is released. To release a complex write lock successfully asserted by lock_write, call the lock_done routine.
NOTES
You must call lock_init (once only) prior to calling lock_write to initialize the lock structure pointer 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 vari- ables and in data structure members.
RETURN VALUES
None
FILES
SEE ALSO
Routines: lock_done(9r), lock_read(9r), lock_terminate(9r), lock_try_read(9r), lock_try_write(9r) Data Structures: lock(9s) lock_write(9r)
Related Man Pages
lock_done(9r) - osf1
lock_try_write(9r) - osf1
lock_write(9r) - osf1
simple_lock(9r) - osf1
simple_lock_init(9r) - osf1
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