#include <nitro/os.h>
OSIntrMode OS_RestoreInterrupts( OSIntrMode state );
state | Interrupt state to set.OSIntrMode is a u32 typedef. |
Returns a value that indicates the state before this function was called.
The type of the return value is OSIntrMode
(a u32
typedef), but the values that can be returned will be one of the OSIntrMode_Irq
enumerated type values below.
Value | Previous state |
---|---|
OS_INTRMODE_IRQ_DISABLE | IRQ Disable (prohibited) |
OS_INTRMODE_IRQ_ENABLE | IRQ Enable (permitted) |
This function sets the interrupt state.
It takes the interrupt state given by state. The state given is expressed as an OSIntrMode_Irq
enumerated type. If OS_INTRMODE_IRQ_ENABLE
is specified, the interrupts will be enabled, and if OS_INTRMODE_IRQ_DISABLE
is specified, the interrupts will be disabled.
However, it is expected that the state parameter will often be used primarily to restore the previous state by specifying to it the return value of the OS_EnableInterrupts
or OS_DisableInterrupts
function.
The return value indicates the state prior to calling the function.
Example
OSIntrMode e = OS_DisableInterrupts();
// Interrupts are disabled here
(void)OS_RestoreInterrupts( e );
Sets/resets the CPSR (current program status register) IRQ interrupt control bit.
OS_EnableInterrupts, OS_DisableInterrupts
2005/03/08 Standardized the Japanese term for "interrupt."
2004/03/04 Changed so FIQ is not included in processing.
2004/01/14 Changed so FIQ is included in processing.
2003/12/01 Initial version.
CONFIDENTIAL