mutex.h File Reference

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Data Structures
struct	Mutex

Macros
#define	MTX_STATUS_UNLOCKED   0
#define	MTX_STATUS_LOCKED   1

Typedefs
typedef struct Mutex	Mutex

Functions
void	Mutex_Init (Mutex *mtx, const char *name)
void	Mutex_Destroy (Mutex *mtx)
void	Mutex_Lock (Mutex *mtx)
int	Mutex_TryLock (Mutex *mtx)
void	Mutex_Unlock (Mutex *mtx)

Macro Definition Documentation

MTX_STATUS_LOCKED

#define MTX_STATUS_LOCKED   1

Definition at line 6 of file mutex.h.

MTX_STATUS_UNLOCKED

#define MTX_STATUS_UNLOCKED   0

Definition at line 5 of file mutex.h.

Typedef Documentation

Mutex

typedef struct Mutex Mutex

Function Documentation

Mutex_Destroy()

void Mutex_Destroy

(

Mutex *

mtx

)

Definition at line 39 of file mutex.c.

{
    WaitChannel_Destroy(&mtx->chan);
    Spinlock_Destroy(&mtx->lock);
    return;
}

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Mutex_Init()

void Mutex_Init	(	Mutex *	mtx,
		const char *	name
	)

Definition at line 30 of file mutex.c.

{
    Spinlock_Init(&mtx->lock, name, SPINLOCK_TYPE_NORMAL);
    WaitChannel_Init(&mtx->chan, name);
 
    return;
}

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Mutex_Lock()

void Mutex_Lock

(

Mutex *

mtx

)

Mutex_Lock –

Acquires the mutex.

Definition at line 52 of file mutex.c.

{
    /*
     * You cannot hold a spinlock while trying to acquire a Mutex that may 
     * sleep!
     */
    ASSERT(Critical_Level() == 0);
 
    /* XXXFILLMEIN */
}

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Mutex_TryLock()

int Mutex_TryLock

(

Mutex *

mtx

)

Mutex_TryLock –

Attempts to acquire the user mutex. Returns EBUSY if the lock is already taken, otherwise 0 on success.

Definition at line 70 of file mutex.c.

{
    /* XXXFILLMEIN */
 
    return 0;
}

Mutex_Unlock()

void Mutex_Unlock

(

Mutex *

mtx

)

Mutex_Unlock –

Releases the user mutex.

Definition at line 83 of file mutex.c.

{
    /* XXXFILLMEIN */
 
    return;
}

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