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osGetIntMask
osSetIntMask

Syntax

#include <ultra64.h>

OSIntMask osGetIntMask(void);
OSIntMask osSetIntMask(OSIntMask im);

Explanation
The osGetIntMask and osSetIntMask functions get and set enabled interrupt masks.

The osGetIntMask call returns the mask of currently enabled hardware interrupts, and the osSetIntMask call allows the application to enable and disable interrupts based on the provided mask. Following are the bits of the mask. The interrupt is enabled if the associated definition below is bitwise OR'ed into the final mask. 

   OS_IM_SW1      CPU software interrupt 1
   OS_IM_SW2      CPU software interrupt 2
   OS_IM_CART     Pak interrupt
   OS_IM_PRENMI   Pre-NMI interrupt
   OS_IM_COUNTER  CPU timer interrupt
   OS_IM_SP       RCP Signal Processor (SP) interrupt
   OS_IM_SI       RCP Serial Interface (SI) interrupt
   OS_IM_AI       RCP Audio Interface (AI) interrupt
   OS_IM_VI       RCP Video Interface (VI) interrupt
   OS_IM_PI       RCP Parallel Interface (PI) interrupt
   OS_IM_DP       RCP Display Processor (DP) interrupt

   OS_IM_NONE     No interrupts enabled
   OS_IM_ALL      All interrupts enabled
The interrupt mask is part of the thread context and is thus saved and restored as threads yield and regain the CPU. All interrupts are enabled for the thread at creation time by osCreateThread. These routines are used sparingly by system threads and should not be needed by application threads. Instead, applications should exploit thread priorities for real time behavior and protection of critical regions.

See Also
osSetEventMesg


Nintendo® Confidential

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Copyright © 1998
Nintendo of America Inc. All rights reserved
Nintendo and N64 are registered trademarks of Nintendo
Last updated March 1998