Commit-ID:  7fc788818c8f317c3a9d3331382aeecf4b726a3c
Gitweb:     http://git.kernel.org/tip/7fc788818c8f317c3a9d3331382aeecf4b726a3c
Author:     Sasha Levin <[email protected]>
AuthorDate: Sun, 3 Feb 2013 20:50:41 -0500
Committer:  Ingo Molnar <[email protected]>
CommitDate: Mon, 4 Feb 2013 11:39:06 +0100

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 <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: Linus Torvalds <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: 
http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
---
 tools/lib/lockdep/include/liblockdep/rwlock.h | 91 +++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)

diff --git a/tools/lib/lockdep/include/liblockdep/rwlock.h 
b/tools/lib/lockdep/include/liblockdep/rwlock.h
new file mode 100644
index 0000000..26f9a68
--- /dev/null
+++ b/tools/lib/lockdep/include/liblockdep/rwlock.h
@@ -0,0 +1,91 @@
+#ifndef _LIBLOCKDEP_RWLOCK_H
+#define _LIBLOCKDEP_RWLOCK_H
+
+#ifdef __USE_LIBLOCKDEP
+
+#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)
+{
+       void *ip = _THIS_IP_;
+       lock_acquire(&lock->dep_map, 0, 0, 2, 2, NULL, (unsigned long)ip);
+       return pthread_rwlock_rdlock(&lock->rwlock);
+
+}
+
+static inline int liblockdep_pthread_rwlock_unlock(liblockdep_pthread_rwlock_t 
*lock)
+{
+       void *ip = _THIS_IP_;
+       lock_release(&lock->dep_map, 0, (unsigned long)ip);
+       return pthread_rwlock_unlock(&lock->rwlock);
+}
+
+static inline int liblockdep_pthread_rwlock_wrlock(liblockdep_pthread_rwlock_t 
*lock)
+{
+       void *ip = _THIS_IP_;
+       lock_acquire(&lock->dep_map, 0, 0, 0, 2, NULL, (unsigned long)ip);
+       return pthread_rwlock_wrlock(&lock->rwlock);
+}
+
+static inline int 
liblockdep_pthread_rwlock_tryrdlock(liblockdep_pthread_rwlock_t *lock)
+{
+       void *ip = _THIS_IP_;
+       lock_acquire(&lock->dep_map, 0, 1, 2, 2, NULL, (unsigned long)ip);
+       return pthread_rwlock_tryrdlock(&lock->rwlock) == 0 ? 1 : 0;
+}
+
+static inline int 
liblockdep_pthread_rwlock_trywlock(liblockdep_pthread_rwlock_t *lock)
+{
+       void *ip = _THIS_IP_;
+       lock_acquire(&lock->dep_map, 0, 1, 0, 2, NULL, (unsigned long)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);
+}
+
+#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
--
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