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core/irq.h: add irq_is_enabled() function

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Hauke Petersen 2019-03-06 18:00:49 +01:00
parent 2de7dab0f4
commit b526394d82
1 changed files with 13 additions and 1 deletions
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14
core/include/irq.h
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@ -1,5 +1,5 @@
/* /*
* Copyright (C) 2013 Freie Universität Berlin * Copyright (C) 2013,2019 Freie Universität Berlin
* *
* This file is subject to the terms and conditions of the GNU Lesser * This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level * General Public License v2.1. See the file LICENSE in the top level
@ -16,6 +16,7 @@
* @brief IRQ driver interface * @brief IRQ driver interface
* *
* @author Freie Universität Berlin, Computer Systems & Telematics * @author Freie Universität Berlin, Computer Systems & Telematics
* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
*/ */
#ifndef IRQ_H #ifndef IRQ_H
@ -67,6 +68,17 @@ MAYBE_INLINE unsigned irq_enable(void);
*/ */
MAYBE_INLINE void irq_restore(unsigned state); MAYBE_INLINE void irq_restore(unsigned state);
/**
* @brief Test if IRQs are currently enabled
*
* @warning Use this function from thread context only. When used in interrupt
* context the returned state may be incorrect.
*
* @return 0 (false) if IRQs are currently disabled
* @return != 0 (true) if IRQs are currently enabled
*/
MAYBE_INLINE int irq_is_enabled(void);
/** /**
* @brief Check whether called from interrupt service routine * @brief Check whether called from interrupt service routine
* @return true, if in interrupt service routine, false if not * @return true, if in interrupt service routine, false if not