Changeset ffe4a87 in mainline for kernel/generic/include/synch/spinlock.h

Timestamp:

2010-05-25T22:15:03Z (14 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

e805e2f

Parents:

d7da4284

Message:

Add interfaces for testing the status of plain spinlocks and the IRQ spinlocks.

Note that because of the non-SMP version of spinlocks, the status must be
checked only in the affirmative manner. Instead of:

ASSERT(!spinlock_locked(…));

one needs to do:

ASSERT(spinlock_unlocked(…));

Otherwise the assertion will be hit on debug non-SMP kernels.

File:

• kernel/generic/include/synch/spinlock.h (modified) (3 diffs)

kernel/generic/include/synch/spinlock.h

@@ -115 +115 @@
 extern void spinlock_lock_debug(spinlock_t *);
 extern void spinlock_unlock_debug(spinlock_t *);
+extern bool spinlock_locked(spinlock_t *);
+extern bool spinlock_unlocked(spinlock_t *);
 
 /** Unlock spinlock
@@ -177 +179 @@
 #define spinlock_trylock(lock)  (preemption_disable(), 1)
 #define spinlock_unlock(lock)   preemption_enable()
+#define spinlock_locked(lock)   1
+#define spinlock_unlocked(lock) 1
 
 #define DEADLOCK_PROBE_INIT(pname)
@@ -283 +287 @@
 extern void irq_spinlock_pass(irq_spinlock_t *, irq_spinlock_t *);
 extern void irq_spinlock_exchange(irq_spinlock_t *, irq_spinlock_t *);
+extern bool irq_spinlock_locked(irq_spinlock_t *);
+extern bool irq_spinlock_unlocked(irq_spinlock_t *);
 
 #endif