29 lines
525 B
C
29 lines
525 B
C
/*
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Copyright (C) 2015-2019 The University of Notre Dame
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This software is distributed under the GNU General Public License.
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See the file LICENSE for details.
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*/
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#include "mutex.h"
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#include "interrupt.h"
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#include "process.h"
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void mutex_lock(struct mutex *m)
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{
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interrupt_block();
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while(m->locked) {
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process_wait(&m->waitqueue);
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interrupt_block();
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}
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m->locked = 1;
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interrupt_unblock();
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}
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void mutex_unlock(struct mutex *m)
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{
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interrupt_block();
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m->locked = 0;
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process_wakeup(&m->waitqueue);
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interrupt_unblock();
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}
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