mutex.c File Reference

#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include <sys/cdefs.h>
#include <sys/kassert.h>
#include <sys/kconfig.h>
#include <sys/kdebug.h>
#include <sys/kmem.h>
#include <sys/mp.h>
#include <sys/queue.h>
#include <sys/thread.h>
#include <sys/spinlock.h>
#include <sys/waitchannel.h>
#include <sys/mutex.h>
#include <errno.h>

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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)

Variables
Thread *	curProc [MAX_CPUS]

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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Variable Documentation

curProc

Thread* curProc[MAX_CPUS]

extern

Current thread executing on a given CPU.

Definition at line 41 of file sched.c.