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add helper function to determine, if the interrupt flag is set

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This commit is contained in:
Stefan Lankes 2011-09-02 13:51:29 -07:00
parent f198c26851
commit 751dda8f1e
1 changed files with 15 additions and 0 deletions
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15
arch/x86/include/asm/irqflags.h
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@ -75,6 +75,21 @@ inline static void irq_nested_enable(uint32_t flags) {
irq_enable();
}
/** @brief Determines, if the interrupt flags (IF) is ser
*
* @return
* - 1 interrupt flag is set
* - 0 interrupt flag is cleared
*/
inline static uint32_t is_irq_enabled(void)
{
uint32_t flags;
asm volatile("pushf; popl %0": "=r"(flags) : : "memory");
if (flags & (1 << 9))
return 1;
return 0;
}
#ifdef __cplusplus
}
#endif