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added a couple of debugging checks into the spinlock functions

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@1969 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
beveloper 2002-11-17 00:28:32 +00:00
parent 9177ec787d
commit 42acb44c35
1 changed files with 33 additions and 1 deletions
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34
src/kernel/core/smp.c
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@ -24,6 +24,8 @@
#include <string.h>
#define DEBUG_SPINLOCKS 1
#define MSG_POOL_SIZE (SMP_MAX_CPUS * 4)
struct smp_msg {
@ -74,6 +76,13 @@ acquire_spinlock(spinlock *lock)
if (atomic_set((int32 *)lock, 1) == 0)
break;
}
} else {
#if DEBUG_SPINLOCKS
if (are_interrupts_enabled())
panic("acquire_spinlock: attempt to acquire lock %p with interrupts enabled\n", lock);
if (atomic_set((int32 *)lock, 1) != 0)
panic("acquire_spinlock: attempt to acquire lock %p twice on non-SMP system\n", lock);
#endif
}
}
@ -82,12 +91,23 @@ static void
acquire_spinlock_nocheck(spinlock *lock)
{
if (smp_num_cpus > 1) {
#if DEBUG_SPINLOCKS
if (are_interrupts_enabled())
panic("acquire_spinlock_nocheck: attempt to acquire lock %p with interrupts enabled\n", lock);
#endif
while (1) {
while(*lock != 0)
;
if (atomic_set((int32 *)lock, 1) == 0)
break;
}
} else {
#if DEBUG_SPINLOCKS
if (are_interrupts_enabled())
panic("acquire_spinlock_nocheck: attempt to acquire lock %p with interrupts enabled\n", lock);
if (atomic_set((int32 *)lock, 1) != 0)
panic("acquire_spinlock_nocheck: attempt to acquire lock %p twice on non-SMP system\n", lock);
#endif
}
}
@ -95,7 +115,19 @@ acquire_spinlock_nocheck(spinlock *lock)
void
release_spinlock(spinlock *lock)
{
*lock = 0;
if (smp_num_cpus > 1) {
if (are_interrupts_enabled())
panic("release_spinlock: attempt to release lock %p with interrupts enabled\n", lock);
if (atomic_set((int32 *)lock, 0) != 1)
panic("release_spinlock: lock %p was already released\n", lock);
} else {
#if DEBUG_SPINLOCKS
if (are_interrupts_enabled())
panic("release_spinlock: attempt to release lock %p with interrupts enabled\n", lock);
if (atomic_set((int32 *)lock, 0) != 1)
panic("release_spinlock: lock %p was already released\n", lock);
#endif
}
}