Disables a bus interrupt level.
#include <sys/types.h> #include <sys/errno.h> #include <sys/intr.h>
void i_mask (handler) struct intr *handler;
|handler||Specifies the address of the interrupt handler structure that was passed to the i_init service.|
The i_mask service disables the bus interrupt level specified by the handler parameter.
The i_disable and i_enable services are used to serialize the execution of various device driver routines with their device interrupts.
The i_init and i_clear services use the i_mask and i_unmask services internally to configure bus interrupt levels.
Device drivers can use the i_disable, i_enable, i_mask, and i_unmask services when they must perform off-level processing with their device interrupts disabled. Device drivers also use these services to allow process execution when their device interrupts are disabled.
The i_mask kernel service can be called from either the process or interrupt environment.
The i_mask service has no return values.
The i_mask kernel service is part of Base Operating System (BOS) Runtime.
The i_unmask kernel service.
Understanding Interrupts, I/O Kernel Services, in AIX Kernel Extensions and Device Support Programming Concepts.