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Ignore whitespace Rev 382 → Rev 383

/SPARTAN/trunk/src/synch/spinlock.c
26,16 → 26,22
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <arch.h>
#include <synch/spinlock.h>
#include <arch/atomic.h>
#include <arch/barrier.h>
#include <synch/spinlock.h>
#include <arch.h>
#include <preemption.h>
#include <print.h>
#include <debug.h>
#ifdef __SMP__
/** Initialize spinlock
*
* Initialize spinlock.
*
* @param sl Pointer to spinlock_t structure.
*/
void spinlock_initialize(spinlock_t *sl)
{
sl->val = 0;
42,6 → 48,14
}
#ifdef DEBUG_SPINLOCK
/** Lock spinlock
*
* Lock spinlock.
* This version has limitted ability to report
* possible occurence of deadlock.
*
* @param sl Pointer to spinlock_t structure.
*/
void spinlock_lock(spinlock_t *sl)
{
int i = 0;
54,10 → 68,22
i = 0;
}
}
/*
* Prevent critical section code from bleeding out this way up.
*/
CS_ENTER_BARRIER();
}
#else
/** Lock spinlock
*
* Lock spinlock.
*
* @param sl Pointer to spinlock_t structure.
*/
void spinlock_lock(spinlock_t *sl)
{
preemption_disable();
67,10 → 93,24
* implementation of spinlock.
*/
spinlock_arch(&sl->val);
/*
* Prevent critical section code from bleeding out this way up.
*/
CS_ENTER_BARRIER();
}
#endif
/** Lock spinlock conditionally
*
* Lock spinlock conditionally.
* If the spinlock is not available at the moment,
* signal failure.
*
* @param sl Pointer to spinlock_t structure.
*
* @return Zero on failure, non-zero otherwise.
*/
int spinlock_trylock(spinlock_t *sl)
{
int rc;
77,6 → 117,10
preemption_disable();
rc = !test_and_set(&sl->val);
/*
* Prevent critical section code from bleeding out this way up.
*/
CS_ENTER_BARRIER();
if (!rc)
85,9 → 129,21
return rc;
}
/** Unlock spinlock
*
* Unlock spinlock.
*
* @param sl Pointer to spinlock_t structure.
*/
void spinlock_unlock(spinlock_t *sl)
{
ASSERT(sl->val != 0);
/*
* Prevent critical section code from bleeding out this way down.
*/
CS_LEAVE_BARRIER();
sl->val = 0;
preemption_enable();
}