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cb5cbe7431
irq_% are not inlined by the compiler which leads to it branching to a function that actually implement a single machine instruction. Inlining these functions makes the call more efficient as well as saving some bytes in ROM.
86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
/*
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* Copyright (C) 2013 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @defgroup core_irq IRQ Handling
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* @ingroup core
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* @brief Provides an API to control interrupt processing
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* @{
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*
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* @file
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* @brief IRQ driver interface
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*
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* @author Freie Universität Berlin, Computer Systems & Telematics
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*/
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#ifndef IRQ_H
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#define IRQ_H
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#include <stdbool.h>
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#include "cpu_conf.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef IRQ_API_INLINED
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#define MAYBE_INLINE static inline __attribute__((always_inline))
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#else
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#define MAYBE_INLINE
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#endif /* IRQ_API_INLINED */
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/**
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* @brief This function sets the IRQ disable bit in the status register
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*
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* @return Previous value of status register. The return value should not be
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* interpreted as a boolean value. The actual value is only
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* significant for irq_restore().
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*
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* @see irq_restore
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*/
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MAYBE_INLINE unsigned irq_disable(void);
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/**
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* @brief This function clears the IRQ disable bit in the status register
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*
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* @return Previous value of status register. The return value should not be
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* interpreted as a boolean value. The actual value is only
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* significant for irq_restore().
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*
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* @see irq_restore
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*/
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MAYBE_INLINE unsigned irq_enable(void);
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/**
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* @brief This function restores the IRQ disable bit in the status register
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* to the value contained within passed state
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*
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* @param[in] state state to restore
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*
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* @see irq_enable
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* @see irq_disable
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*/
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MAYBE_INLINE void irq_restore(unsigned state);
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/**
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* @brief Check whether called from interrupt service routine
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* @return true, if in interrupt service routine, false if not
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*/
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MAYBE_INLINE int irq_is_in(void);
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#ifdef IRQ_API_INLINED
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#include "irq_arch.h"
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#endif /* IRQ_API_INLINED */
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#ifdef __cplusplus
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}
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#endif
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#endif /* IRQ_H */
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/** @} */
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