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37 lines
685 B
C
37 lines
685 B
C
/**
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* Native CPU atomic.h implementation
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*
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* Copyright (C) 2013 Ludwig Ortmann
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*
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* This file subject to the terms and conditions of the GNU Lesser General
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* Public License. See the file LICENSE in the top level directory for more
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* details.
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*
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* @ingroup arch
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* @{
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* @file
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* @author Ludwig Ortmann <ludwig.ortmann@fu-berlin.de>
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* @}
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*/
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#include <atomic.h>
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#include <irq.h>
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#include <debug.h>
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unsigned int atomic_set_return(unsigned int* val, unsigned int set)
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{
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unsigned int old_val;
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unsigned int old_state;
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DEBUG("atomic_set_return\n");
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old_state = disableIRQ();
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old_val = *val;
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*val = set;
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restoreIRQ(old_state);
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return old_val;
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}
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