Changeset a9f1372 in mainline for kernel/generic/include/synch/spinlock.h

Timestamp:

2010-05-25T18:35:36Z (14 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

b7398c0

Parents:

0095368

Message:

Move the irq_spinlock code to spinlock.c for better debuggability.

File:

• kernel/generic/include/synch/spinlock.h (modified) (1 diff)

kernel/generic/include/synch/spinlock.h

@@ -277 +277 @@
         IRQ_SPINLOCK_STATIC_INITIALIZE_NAME(lock_name, #lock_name)
 
-/** Initialize interrupts-disabled spinlock
- *
- * @param lock IRQ spinlock to be initialized.
- * @param name IRQ spinlock name.
- *
- */
-static inline void irq_spinlock_initialize(irq_spinlock_t *lock, const char *name)
-{
-        spinlock_initialize(&(lock->lock), name);
-        lock->guard = false;
-        lock->ipl = 0;
-}
-
-/** Lock interrupts-disabled spinlock
- *
- * Lock a spinlock which requires disabled interrupts.
- *
- * @param lock    IRQ spinlock to be locked.
- * @param irq_dis If true, interrupts are actually disabled
- *                prior locking the spinlock. If false, interrupts
- *                are expected to be already disabled.
- *
- */
-static inline void irq_spinlock_lock(irq_spinlock_t *lock, bool irq_dis)
-{
-        if (irq_dis) {
-                ipl_t ipl = interrupts_disable();
-                spinlock_lock(&(lock->lock));
-                
-                lock->guard = true;
-                lock->ipl = ipl;
-        } else {
-                ASSERT_IRQ_SPINLOCK(interrupts_disabled(), lock);
-                
-                spinlock_lock(&(lock->lock));
-                ASSERT_IRQ_SPINLOCK(!lock->guard, lock);
-        }
-}
-
-/** Unlock interrupts-disabled spinlock
- *
- * Unlock a spinlock which requires disabled interrupts.
- *
- * @param lock    IRQ spinlock to be unlocked.
- * @param irq_res If true, interrupts are restored to previously
- *                saved interrupt level.
- *
- */
-static inline void irq_spinlock_unlock(irq_spinlock_t *lock, bool irq_res)
-{
-        ASSERT_IRQ_SPINLOCK(interrupts_disabled(), lock);
-        
-        if (irq_res) {
-                ASSERT_IRQ_SPINLOCK(lock->guard, lock);
-                
-                lock->guard = false;
-                ipl_t ipl = lock->ipl;
-                
-                spinlock_unlock(&(lock->lock));
-                interrupts_restore(ipl);
-        } else {
-                ASSERT_IRQ_SPINLOCK(!lock->guard, lock);
-                spinlock_unlock(&(lock->lock));
-        }
-}
-
-/** Lock interrupts-disabled spinlock
- *
- * Lock an interrupts-disabled spinlock conditionally. If the
- * spinlock is not available at the moment, signal failure.
- * Interrupts are expected to be already disabled.
- *
- * @param lock IRQ spinlock to be locked conditionally.
- *
- * @return Zero on failure, non-zero otherwise.
- *
- */
-static inline int irq_spinlock_trylock(irq_spinlock_t *lock)
-{
-        ASSERT_IRQ_SPINLOCK(interrupts_disabled(), lock);
-        int rc = spinlock_trylock(&(lock->lock));
-        
-        ASSERT_IRQ_SPINLOCK(!lock->guard, lock);
-        return rc;
-}
-
-/** Pass lock from one interrupts-disabled spinlock to another
- *
- * Pass lock from one IRQ spinlock to another IRQ spinlock
- * without enabling interrupts during the process.
- *
- * The first IRQ spinlock is supposed to be locked.
- *
- * @param unlock IRQ spinlock to be unlocked.
- * @param lock   IRQ spinlock to be locked.
- *
- */
-static inline void irq_spinlock_pass(irq_spinlock_t *unlock,
-    irq_spinlock_t *lock)
-{
-        ASSERT_IRQ_SPINLOCK(interrupts_disabled(), unlock);
-        
-        /* Pass guard from unlock to lock */
-        bool guard = unlock->guard;
-        ipl_t ipl = unlock->ipl;
-        unlock->guard = false;
-        
-        spinlock_unlock(&(unlock->lock));
-        spinlock_lock(&(lock->lock));
-        
-        ASSERT_IRQ_SPINLOCK(!lock->guard, lock);
-        
-        if (guard) {
-                lock->guard = true;
-                lock->ipl = ipl;
-        }
-}
-
-/** Hand-over-hand locking of interrupts-disabled spinlocks
- *
- * Implement hand-over-hand locking between two interrupts-disabled
- * spinlocks without enabling interrupts during the process.
- *
- * The first IRQ spinlock is supposed to be locked.
- *
- * @param unlock IRQ spinlock to be unlocked.
- * @param lock   IRQ spinlock to be locked.
- *
- */
-static inline void irq_spinlock_exchange(irq_spinlock_t *unlock,
-    irq_spinlock_t *lock)
-{
-        ASSERT_IRQ_SPINLOCK(interrupts_disabled(), unlock);
-        
-        spinlock_lock(&(lock->lock));
-        ASSERT_IRQ_SPINLOCK(!lock->guard, lock);
-        
-        /* Pass guard from unlock to lock */
-        if (unlock->guard) {
-                lock->guard = true;
-                lock->ipl = unlock->ipl;
-                unlock->guard = false;
-        }
-        
-        spinlock_unlock(&(unlock->lock));
-}
+extern void irq_spinlock_initialize(irq_spinlock_t *, const char *);
+extern void irq_spinlock_lock(irq_spinlock_t *, bool);
+extern void irq_spinlock_unlock(irq_spinlock_t *, bool);
+extern int irq_spinlock_trylock(irq_spinlock_t *);
+extern void irq_spinlock_pass(irq_spinlock_t *, irq_spinlock_t *);
+extern void irq_spinlock_exchange(irq_spinlock_t *, irq_spinlock_t *);
 
 #endif