liblockdep: Add public headers for pthread_rwlock_t implementation

Both pthreads and lockdep support dealing with rwlocks, so
here's the liblockdep implementation for those.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: torvalds@linux-foundation.org
Link: http://lkml.kernel.org/r/1371163284-6346-6-git-send-email-sasha.levin@oracle.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 86 insertions, 0 deletions

diff --git a/tools/lib/lockdep/include/liblockdep/rwlock.h b/tools/lib/lockdep/include/liblockdep/rwlock.h
new file mode 100644
index 000000000000..a680ab8c2e36
--- /dev/null
+++ b/tools/lib/lockdep/include/liblockdep/rwlock.h
@@ -0,0 +1,86 @@
+#ifndef _LIBLOCKDEP_RWLOCK_H
+#define _LIBLOCKDEP_RWLOCK_H
+
+#include <pthread.h>
+#include "common.h"
+
+struct liblockdep_pthread_rwlock {
+        pthread_rwlock_t rwlock;
+        struct lockdep_map dep_map;
+};
+
+typedef struct liblockdep_pthread_rwlock liblockdep_pthread_rwlock_t;
+
+#define LIBLOCKDEP_PTHREAD_RWLOCK_INITIALIZER(rwl)                      \
+                (struct liblockdep_pthread_rwlock) {                    \
+        .rwlock = PTHREAD_RWLOCK_INITIALIZER,                           \
+        .dep_map = STATIC_LOCKDEP_MAP_INIT(#rwl, &((&(rwl))->dep_map)), \
+}
+
+static inline int __rwlock_init(liblockdep_pthread_rwlock_t *lock,
+                                const char *name,
+                                struct lock_class_key *key,
+                                const pthread_rwlockattr_t *attr)
+{
+        lockdep_init_map(&lock->dep_map, name, key, 0);
+
+        return pthread_rwlock_init(&lock->rwlock, attr);
+}
+
+#define liblockdep_pthread_rwlock_init(lock, attr)              \
+({                                                      \
+        static struct lock_class_key __key;             \
+                                                        \
+        __rwlock_init((lock), #lock, &__key, (attr));   \
+})
+
+static inline int liblockdep_pthread_rwlock_rdlock(liblockdep_pthread_rwlock_t *lock)
+{
+        lock_acquire(&lock->dep_map, 0, 0, 2, 2, NULL, (unsigned long)_RET_IP_);
+        return pthread_rwlock_rdlock(&lock->rwlock);
+
+}
+
+static inline int liblockdep_pthread_rwlock_unlock(liblockdep_pthread_rwlock_t *lock)
+{
+        lock_release(&lock->dep_map, 0, (unsigned long)_RET_IP_);
+        return pthread_rwlock_unlock(&lock->rwlock);
+}
+
+static inline int liblockdep_pthread_rwlock_wrlock(liblockdep_pthread_rwlock_t *lock)
+{
+        lock_acquire(&lock->dep_map, 0, 0, 0, 2, NULL, (unsigned long)_RET_IP_);
+        return pthread_rwlock_wrlock(&lock->rwlock);
+}
+
+static inline int liblockdep_pthread_rwlock_tryrdlock(liblockdep_pthread_rwlock_t *lock)
+{
+        lock_acquire(&lock->dep_map, 0, 1, 2, 2, NULL, (unsigned long)_RET_IP_);
+        return pthread_rwlock_tryrdlock(&lock->rwlock) == 0 ? 1 : 0;
+}
+
+static inline int liblockdep_pthread_rwlock_trywlock(liblockdep_pthread_rwlock_t *lock)
+{
+        lock_acquire(&lock->dep_map, 0, 1, 0, 2, NULL, (unsigned long)_RET_IP_);
+        return pthread_rwlock_trywlock(&lock->rwlock) == 0 ? 1 : 0;
+}
+
+static inline int liblockdep_rwlock_destroy(liblockdep_pthread_rwlock_t *lock)
+{
+        return pthread_rwlock_destroy(&lock->rwlock);
+}
+
+#ifdef __USE_LIBLOCKDEP
+
+#define pthread_rwlock_t                liblockdep_pthread_rwlock_t
+#define pthread_rwlock_init             liblockdep_pthread_rwlock_init
+#define pthread_rwlock_rdlock           liblockdep_pthread_rwlock_rdlock
+#define pthread_rwlock_unlock           liblockdep_pthread_rwlock_unlock
+#define pthread_rwlock_wrlock           liblockdep_pthread_rwlock_wrlock
+#define pthread_rwlock_tryrdlock        liblockdep_pthread_rwlock_tryrdlock
+#define pthread_rwlock_trywlock         liblockdep_pthread_rwlock_trywlock
+#define pthread_rwlock_destroy          liblockdep_rwlock_destroy
+
+#endif
+
+#endif