-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* 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
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#ifndef __KERNEL__
-#include <stdlib.h>
#include <libcfs/libcfs.h>
/*
* Optional debugging (magic stamping and checking ownership) can be added.
*/
-#if 0
/*
* spin_lock
*
* - spin_lock_init(x)
* - spin_lock(x)
+ * - spin_lock_nested(x, subclass)
* - spin_unlock(x)
* - spin_trylock(x)
*
void spin_lock_init(spinlock_t *lock)
{
- LASSERT(lock != NULL);
- (void)lock;
+ LASSERT(lock != NULL);
+ (void)lock;
}
void spin_lock(spinlock_t *lock)
{
- (void)lock;
+ (void)lock;
}
void spin_unlock(spinlock_t *lock)
{
- (void)lock;
+ (void)lock;
}
int spin_trylock(spinlock_t *lock)
{
- (void)lock;
+ (void)lock;
return 1;
}
void spin_lock_bh_init(spinlock_t *lock)
{
- LASSERT(lock != NULL);
- (void)lock;
+ LASSERT(lock != NULL);
+ (void)lock;
}
void spin_lock_bh(spinlock_t *lock)
{
- LASSERT(lock != NULL);
- (void)lock;
+ LASSERT(lock != NULL);
+ (void)lock;
}
void spin_unlock_bh(spinlock_t *lock)
{
- LASSERT(lock != NULL);
- (void)lock;
+ LASSERT(lock != NULL);
+ (void)lock;
}
/*
* - __down(x)
* - __up(x)
*/
-struct semaphore {};
void sema_init(struct semaphore *s, int val)
{
- LASSERT(s != NULL);
- (void)s;
- (void)val;
+ LASSERT(s != NULL);
+ (void)s;
+ (void)val;
}
void __down(struct semaphore *s)
{
- LASSERT(s != NULL);
- (void)s;
+ LASSERT(s != NULL);
+ (void)s;
}
-void __up(struct semaphore *s)
+int __down_interruptible(struct semaphore *s)
{
- LASSERT(s != NULL);
- (void)s;
+ LASSERT(s != NULL);
+ (void)s;
+ return 0;
}
-/*
- * Mutex:
- *
- * - init_mutex(x)
- * - init_mutex_locked(x)
- * - mutex_up(x)
- * - mutex_down(x)
- */
-
-#define mutex_up(s) __up(s)
-#define mutex_down(s) __down(s)
+void __up(struct semaphore *s)
+{
+ LASSERT(s != NULL);
+ (void)s;
+}
-#define init_mutex(x) sema_init(x, 1)
-#define init_mutex_locked(x) sema_init(x, 0)
/*
* Completion:
* - complete(c)
* - wait_for_completion(c)
*/
-struct completion {};
+static wait_handler_t wait_handler;
+void init_completion_module(wait_handler_t handler)
+{
+ wait_handler = handler;
+}
+
+int call_wait_handler(int timeout)
+{
+ if (!wait_handler)
+ return -ENOSYS;
+ return wait_handler(timeout);
+}
+
+#ifndef HAVE_LIBPTHREAD
void init_completion(struct completion *c)
{
- LASSERT(c != NULL);
- (void)c;
+ LASSERT(c != NULL);
+ c->done = 0;
+ init_waitqueue_head(&c->wait);
+}
+
+void fini_completion(struct completion *c)
+{
}
void complete(struct completion *c)
{
- LASSERT(c != NULL);
- (void)c;
+ LASSERT(c != NULL);
+ c->done = 1;
+ wake_up(&c->wait);
}
void wait_for_completion(struct completion *c)
{
- LASSERT(c != NULL);
- (void)c;
+ LASSERT(c != NULL);
+ do {
+ if (call_wait_handler(1000) < 0)
+ break;
+ } while (c->done == 0);
}
+int wait_for_completion_interruptible(struct completion *c)
+{
+ LASSERT(c != NULL);
+ do {
+ if (call_wait_handler(1000) < 0)
+ break;
+ } while (c->done == 0);
+ return 0;
+}
+#endif /* HAVE_LIBPTHREAD */
+
/*
* rw_semaphore:
*
* - down_write(x)
* - up_write(x)
*/
-struct rw_semaphore {};
void init_rwsem(struct rw_semaphore *s)
{
- LASSERT(s != NULL);
- (void)s;
+ LASSERT(s != NULL);
+ (void)s;
}
void down_read(struct rw_semaphore *s)
{
- LASSERT(s != NULL);
- (void)s;
+ LASSERT(s != NULL);
+ (void)s;
}
int down_read_trylock(struct rw_semaphore *s)
{
- LASSERT(s != NULL);
- (void)s;
+ LASSERT(s != NULL);
+ (void)s;
return 1;
}
void down_write(struct rw_semaphore *s)
{
- LASSERT(s != NULL);
- (void)s;
+ LASSERT(s != NULL);
+ (void)s;
+}
+
+void downgrade_write(struct rw_semaphore *s)
+{
+ LASSERT(s != NULL);
+ (void)s;
}
int down_write_trylock(struct rw_semaphore *s)
{
- LASSERT(s != NULL);
- (void)s;
+ LASSERT(s != NULL);
+ (void)s;
return 1;
}
void up_read(struct rw_semaphore *s)
{
- LASSERT(s != NULL);
- (void)s;
+ LASSERT(s != NULL);
+ (void)s;
}
void up_write(struct rw_semaphore *s)
{
- LASSERT(s != NULL);
- (void)s;
+ LASSERT(s != NULL);
+ (void)s;
+}
+
+void fini_rwsem(struct rw_semaphore *s)
+{
+ LASSERT(s != NULL);
+ (void)s;
}
-#endif
#ifdef HAVE_LIBPTHREAD
/*
- * Completion
+ * Multi-threaded user space completion
*/
-void cfs_init_completion(struct cfs_completion *c)
+void init_completion(struct completion *c)
{
LASSERT(c != NULL);
c->c_done = 0;
pthread_cond_init(&c->c_cond, NULL);
}
-void cfs_fini_completion(struct cfs_completion *c)
+void fini_completion(struct completion *c)
{
LASSERT(c != NULL);
pthread_mutex_destroy(&c->c_mut);
pthread_cond_destroy(&c->c_cond);
}
-void cfs_complete(struct cfs_completion *c)
+void complete(struct completion *c)
{
LASSERT(c != NULL);
pthread_mutex_lock(&c->c_mut);
pthread_mutex_unlock(&c->c_mut);
}
-void cfs_wait_for_completion(struct cfs_completion *c)
+void wait_for_completion(struct completion *c)
{
LASSERT(c != NULL);
pthread_mutex_lock(&c->c_mut);
}
/*
- * atomic primitives
+ * Multi-threaded user space atomic primitives
*/
static pthread_mutex_t atomic_guard_lock = PTHREAD_MUTEX_INITIALIZER;
-int cfs_atomic_read(cfs_atomic_t *a)
+int mt_atomic_read(mt_atomic_t *a)
{
int r;
return r;
}
-void cfs_atomic_set(cfs_atomic_t *a, int b)
+void mt_atomic_set(mt_atomic_t *a, int b)
{
pthread_mutex_lock(&atomic_guard_lock);
a->counter = b;
pthread_mutex_unlock(&atomic_guard_lock);
}
-int cfs_atomic_dec_and_test(cfs_atomic_t *a)
+int mt_atomic_dec_and_test(mt_atomic_t *a)
{
int r;
return (r == 0);
}
-void cfs_atomic_inc(cfs_atomic_t *a)
+void mt_atomic_inc(mt_atomic_t *a)
{
pthread_mutex_lock(&atomic_guard_lock);
++a->counter;
pthread_mutex_unlock(&atomic_guard_lock);
}
-void cfs_atomic_dec(cfs_atomic_t *a)
+void mt_atomic_dec(mt_atomic_t *a)
{
pthread_mutex_lock(&atomic_guard_lock);
--a->counter;
pthread_mutex_unlock(&atomic_guard_lock);
}
-void cfs_atomic_add(int b, cfs_atomic_t *a)
+void mt_atomic_add(int b, mt_atomic_t *a)
{
pthread_mutex_lock(&atomic_guard_lock);
pthread_mutex_unlock(&atomic_guard_lock);
}
-void cfs_atomic_sub(int b, cfs_atomic_t *a)
+void mt_atomic_sub(int b, mt_atomic_t *a)
{
pthread_mutex_lock(&atomic_guard_lock);
a->counter -= b;
git://git.whamcloud.com / fs / lustre-release.git / blobdiff