* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see [sun.com URL with a
- * copy of GPLv2].
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
*/
#ifndef __KERNEL__
-#include <stdio.h>
-#include <stdlib.h>
-#if 0
+/*
+ * The userspace implementations of linux/spinlock.h vary; we just
+ * include our own for all of them
+ */
+#define __LINUX_SPINLOCK_H
+
/*
* Optional debugging (magic stamping and checking ownership) can be added.
*/
#define SPIN_LOCK_UNLOCKED (spinlock_t) { }
#define LASSERT_SPIN_LOCKED(lock) do {} while(0)
+#define LASSERT_SEM_LOCKED(sem) do {} while(0)
void spin_lock_init(spinlock_t *lock);
void spin_lock(spinlock_t *lock);
void spin_lock_bh_init(spinlock_t *lock);
void spin_lock_bh(spinlock_t *lock);
void spin_unlock_bh(spinlock_t *lock);
-static inline int spin_is_locked(spinlock_t *l) {return 1;}
+static inline int spin_is_locked(spinlock_t *l) {return 1;}
static inline void spin_lock_irqsave(spinlock_t *l, unsigned long f){}
static inline void spin_unlock_irqrestore(spinlock_t *l, unsigned long f){}
* - mutex_up(x)
* - mutex_down(x)
*/
-#define mutex_up(s) __up(s)
-#define mutex_down(s) __down(s)
+#define DECLARE_MUTEX(name) \
+ struct semaphore name = { 1 }
+
+#define mutex_up(s) __up(s)
+#define up(s) mutex_up(s)
+#define mutex_down(s) __down(s)
+#define down(s) mutex_down(s)
-#define init_mutex(x) sema_init(x, 1)
-#define init_mutex_locked(x) sema_init(x, 0)
+#define init_MUTEX(x) sema_init(x, 1)
+#define init_MUTEX_LOCKED(x) sema_init(x, 0)
+#define init_mutex(s) init_MUTEX(s)
/*
* Completion:
* - complete(c)
* - wait_for_completion(c)
*/
-#if 0
-struct completion {};
-
+struct completion {
+ unsigned int done;
+ cfs_waitq_t wait;
+};
+typedef int (*cfs_wait_handler_t) (int timeout);
+void init_completion_module(cfs_wait_handler_t handler);
void init_completion(struct completion *c);
+void init_completion_module(cfs_wait_handler_t handler);
void complete(struct completion *c);
void wait_for_completion(struct completion *c);
-#endif
+int wait_for_completion_interruptible(struct completion *c);
+
+#define COMPLETION_INITIALIZER(work) \
+ { 0, __WAIT_QUEUE_HEAD_INITIALIZER((work).wait) }
+
+#define DECLARE_COMPLETION(work) \
+ struct completion work = COMPLETION_INITIALIZER(work)
+
+#define INIT_COMPLETION(x) ((x).done = 0)
+
/*
* rw_semaphore:
* - down_write(x)
* - up_write(x)
*/
-struct rw_semaphore {};
+struct rw_semaphore {
+ int foo;
+};
void init_rwsem(struct rw_semaphore *s);
void down_read(struct rw_semaphore *s);
int down_write_trylock(struct rw_semaphore *s);
void up_read(struct rw_semaphore *s);
void up_write(struct rw_semaphore *s);
+void fini_rwsem(struct rw_semaphore *s);
/*
* read-write lock : Need to be investigated more!!
* - write_unlock(x)
*/
typedef struct rw_semaphore rwlock_t;
+#define RW_LOCK_UNLOCKED (rwlock_t) { }
-#define rwlock_init(pl) init_rwsem(pl)
+#define rwlock_init(pl) init_rwsem(pl)
-#define read_lock(l) down_read(l)
-#define read_unlock(l) up_read(l)
-#define write_lock(l) down_write(l)
-#define write_unlock(l) up_write(l)
+#define read_lock(l) down_read(l)
+#define read_unlock(l) up_read(l)
+#define write_lock(l) down_write(l)
+#define write_unlock(l) up_write(l)
static inline void
write_lock_irqsave(rwlock_t *l, unsigned long f) { write_lock(l); }
static inline void
write_unlock_irqrestore(rwlock_t *l, unsigned long f) { write_unlock(l); }
-static inline void
+static inline void
read_lock_irqsave(rwlock_t *l, unsigned long f) { read_lock(l); }
static inline void
read_unlock_irqrestore(rwlock_t *l, unsigned long f) { read_unlock(l); }
typedef struct { volatile int counter; } atomic_t;
#define ATOMIC_INIT(i) { (i) }
+
#define atomic_read(a) ((a)->counter)
#define atomic_set(a,b) do {(a)->counter = b; } while (0)
#define atomic_dec_and_test(a) ((--((a)->counter)) == 0)
+#define atomic_dec_and_lock(a,b) ((--((a)->counter)) == 0)
#define atomic_inc(a) (((a)->counter)++)
#define atomic_dec(a) do { (a)->counter--; } while (0)
#define atomic_add(b,a) do {(a)->counter += b;} while (0)
-#define atomic_add_return(n,a) ((a)->counter = n)
+#define atomic_add_return(n,a) ((a)->counter += n)
#define atomic_inc_return(a) atomic_add_return(1,a)
#define atomic_sub(b,a) do {(a)->counter -= b;} while (0)
+#define atomic_sub_return(n,a) ((a)->counter -= n)
+#define atomic_dec_return(a) atomic_sub_return(1,a)
-#endif
#ifdef HAVE_LIBPTHREAD
#include <pthread.h>
#endif /* HAVE_LIBPTHREAD */
+/**************************************************************************
+ *
+ * Mutex interface.
+ *
+ **************************************************************************/
+
+struct mutex {
+ struct semaphore m_sem;
+};
+
+#define DEFINE_MUTEX(m) struct mutex m
+
+static inline void mutex_init(struct mutex *mutex)
+{
+ init_mutex(&mutex->m_sem);
+}
+
+static inline void mutex_lock(struct mutex *mutex)
+{
+ mutex_down(&mutex->m_sem);
+}
+
+static inline void mutex_unlock(struct mutex *mutex)
+{
+ mutex_up(&mutex->m_sem);
+}
+
+/**
+ * Try-lock this mutex.
+ *
+ *
+ * \retval 0 try-lock succeeded (lock acquired).
+ * \retval errno indicates lock contention.
+ */
+static inline int mutex_down_trylock(struct mutex *mutex)
+{
+ return 0;
+}
+
+/**
+ * Try-lock this mutex.
+ *
+ * Note, return values are negation of what is expected from down_trylock() or
+ * pthread_mutex_trylock().
+ *
+ * \retval 1 try-lock succeeded (lock acquired).
+ * \retval 0 indicates lock contention.
+ */
+static inline int mutex_trylock(struct mutex *mutex)
+{
+ return !mutex_down_trylock(mutex);
+}
+
+static inline void mutex_destroy(struct mutex *lock)
+{
+}
+
+/*
+ * This is for use in assertions _only_, i.e., this function should always
+ * return 1.
+ *
+ * \retval 1 mutex is locked.
+ *
+ * \retval 0 mutex is not locked. This should never happen.
+ */
+static inline int mutex_is_locked(struct mutex *lock)
+{
+ return 1;
+}
+
+
+/**************************************************************************
+ *
+ * Lockdep "implementation". Also see lustre_compat25.h
+ *
+ **************************************************************************/
+
+struct lock_class_key {
+ int foo;
+};
+
+static inline void lockdep_set_class(void *lock, struct lock_class_key *key)
+{
+}
+
+static inline void lockdep_off(void)
+{
+}
+
+static inline void lockdep_on(void)
+{
+}
+
+/* This has to be a macro, so that can be undefined in kernels that do not
+ * support lockdep. */
+#define mutex_lock_nested(mutex, subclass) mutex_lock(mutex)
+#define spin_lock_nested(lock, subclass) spin_lock(lock)
+#define down_read_nested(lock, subclass) down_read(lock)
+#define down_write_nested(lock, subclass) down_write(lock)
+
+
/* !__KERNEL__ */
#endif
git://git.whamcloud.com / fs / lustre-release.git / blobdiff