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38 lines
622 B
C
38 lines
622 B
C
#include "mutex.h"
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#include "../kernel.h"
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// mutex lock structure:
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// this is a dict describing which process instantiated the lock
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// it maps mutex_id -> pid (or zero for unused locks)
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int locks[MUTEX_COUNT];
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int locks_bitfield[MUTEX_COUNT / XLEN]; // each bit representing if the lock is
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// engaged
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int mutex_is_locked(int mutex_id)
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{
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int offset = mutex_id % XLEN;
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return locks[mutex_id / XLEN] & (1 << offset);
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}
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int mutex_create()
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{
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return 0;
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}
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void mutex_lock(int mutex_id)
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{
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}
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void mutex_unlock(int mutex_id)
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{
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}
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void mutex_destroy(int mutex_id)
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{
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}
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