#include <rtl_sync.h> void rtl_no_interrupts(rtl_irqstate_t state); void rtl_restore_interrupts(rtl_irqstate_t state); void rtl_stop_interrupts(); void rtl_allow_interrupts(); |
These functions are non-portable Realtime Linux extensions.
rtl_no_interrupts saves the current state of the processor interrupt flags in the variable state and then disables the interrupts on this processor.
rtl_restore_interrupts is defined as a macro. It uses its argument to restore the interrupt state previously saved with rtl_no_interrupts.
rtl_stop_interrupts disables the interrupts.
rtl_allow_interrupts enables the interrupts.
The following example demonstrates a typical usage.
{ rtl_irqstate_t irqstate; rtl_no_interrupts(irqstate); /* this code runs with interrupts disabled! */ rtl_restore_interrupts(irqstate); /* interrupt state is back to what it was before */ } |
These functions have effect only on the interrupt flags of the current processor.
Be sure to only disable hardware interrupts for short periods of time.
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