Raises the interrupt priority, and locks a simple lock if necessary.
#include <sys/lock_def.h>
int disable_lock ( int_pri, lock_addr)
int int_pri;
simple_lock_t lock_addr;
| int_pri | Specifies the interrupt priority to set. |
| lock_addr | Specifies the address of the lock word to lock. |
The disable_lock kernel service raises the interrupt priority, and locks a simple lock if necessary, in order to provide optimized thread-interrupt critical section protection for the system on which it is executing. On a multiprocessor system, calling the disable_lock kernel service is equivalent to calling the i_disable and simple_lock kernel services. On a uniprocessor system, the call to the simple_lock service is not necessary, and is omitted. However, you should still pass a valid lock address to the disable_lock kernel service. Never pass a NULL lock address.
The disable_lock kernel service can be called from either the process or interrupt environment.
The disable_lock kernel service returns the previous interrupt priority.
The i_disable kernel service, simple_lock_init kernel service, simple_lock kernel service, unlock_enable kernel service.
Understanding Locking,Locking Kernel Services,Understanding Interrupts,I/O Kernel Services, and Interrupt Environment. in AIX 5L Version 5.2 Kernel Extensions and Device Support Programming Concepts.