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https://github.com/RIOT-OS/RIOT.git
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c5c83cfe3c
- Updated to inline-able IRQ API
- Improved robustness of functions
- Added memory barrier to prevent the compiler from moving code outside of
a critical section guarded by irq_disable() ... irq_restore()
- Reduced overhead of `irq_disable()`
- After clearing the global interrupt enable (GIE) bit, IRQs remain enabled
for up to one CPU cycle
- The previous implementation just added a nop to fill that cycle
- This implementation uses the cycle for masking the return value
- Reduced overhead of `irq_restore()`
- Now only one CPU cycle is needed
- `irq_disable()`, `irq_restore()`, and `irq_enable()` work now in constant time
28 lines
545 B
C
28 lines
545 B
C
/*
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* Copyright (C) 2014 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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* @ingroup cpu_msp430_common
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* @{
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*
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* @file
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* @brief ISR related variables
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*
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* @author Kaspar Schleiser <kaspar@schleiser.de>
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* @author Oliver Hahm <oliver.hahm@inria.fr>
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*
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* @}
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*/
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#include "irq.h"
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#include "cpu.h"
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volatile int __irq_is_in = 0;
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char __isr_stack[ISR_STACKSIZE];
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