20 lines
360 B
C
20 lines
360 B
C
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#ifndef __KERN_SYNC_SEM_H__
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#define __KERN_SYNC_SEM_H__
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#include <defs.h>
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#include <atomic.h>
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#include <wait.h>
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typedef struct {
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int value;
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wait_queue_t wait_queue;
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} semaphore_t;
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void sem_init(semaphore_t *sem, int value);
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void up(semaphore_t *sem);
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void down(semaphore_t *sem);
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bool try_down(semaphore_t *sem);
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#endif /* !__KERN_SYNC_SEM_H__ */
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