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36 lines
723 B
36 lines
723 B
/** |
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* Native CPU atomic.h implementation |
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* |
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* Copyright (C) 2013 Ludwig Ortmann <ludwig.ortmann@fu-berlin.de> |
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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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* @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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