+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
- * Copyright (C) 2004 Cluster File Systems, Inc.
- * Author: Nikita Danilov <nikita@clusterfs.com>
- *
- * This file is part of Lustre, http://www.lustre.org.
- *
- * Lustre is free software; you can redistribute it and/or modify it under the
- * terms of version 2 of the GNU General Public License as published by the
- * Free Software Foundation.
- *
- * Lustre is distributed in the hope that it will be useful, but WITHOUT ANY
- * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
- * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
- * details.
- *
- * You should have received a copy of the GNU General Public License along
- * with Lustre; if not, write to the Free Software Foundation, Inc., 675 Mass
- * Ave, Cambridge, MA 02139, USA.
- *
- * Implementation of portable time API for user-level.
- *
- */
-
-/* Implementations of portable synchronization APIs for liblustre */
-
-/*
- * liblustre is single-threaded, so most "synchronization" APIs are trivial.
- *
- * XXX Liang: There are several branches share lnet with b_hd_newconfig,
- * if we define lock APIs at here, there will be conflict with liblustre
- * in other branches.
- */
-
-#ifndef __KERNEL__
-
-#include <stdlib.h>
-#include <libcfs/libcfs.h>
-#include <libcfs/kp30.h>
-
-/*
- * Optional debugging (magic stamping and checking ownership) can be added.
- */
-
-#if 0
-/*
- * spin_lock
- *
- * - spin_lock_init(x)
- * - spin_lock(x)
- * - spin_unlock(x)
- * - spin_trylock(x)
- *
- * - spin_lock_irqsave(x, f)
- * - spin_unlock_irqrestore(x, f)
- *
- * No-op implementation.
- */
-
-void spin_lock_init(spinlock_t *lock)
-{
- LASSERT(lock != NULL);
- (void)lock;
-}
-
-void spin_lock(spinlock_t *lock)
-{
- (void)lock;
-}
-
-void spin_unlock(spinlock_t *lock)
-{
- (void)lock;
-}
-
-int spin_trylock(spinlock_t *lock)
-{
- (void)lock;
- return 1;
-}
-
-void spin_lock_bh_init(spinlock_t *lock)
-{
- LASSERT(lock != NULL);
- (void)lock;
-}
-
-void spin_lock_bh(spinlock_t *lock)
-{
- LASSERT(lock != NULL);
- (void)lock;
-}
-
-void spin_unlock_bh(spinlock_t *lock)
-{
- LASSERT(lock != NULL);
- (void)lock;
-}
-
-/*
- * Semaphore
- *
- * - sema_init(x, v)
- * - __down(x)
- * - __up(x)
- */
-struct semaphore {};
-
-void sema_init(struct semaphore *s, int val)
-{
- LASSERT(s != NULL);
- (void)s;
- (void)val;
-}
-
-void __down(struct semaphore *s)
-{
- LASSERT(s != NULL);
- (void)s;
-}
-
-void __up(struct semaphore *s)
-{
- LASSERT(s != NULL);
- (void)s;
-}
-
-/*
- * 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)
-
-#define init_mutex(x) sema_init(x, 1)
-#define init_mutex_locked(x) sema_init(x, 0)
-
-/*
- * Completion:
- *
- * - init_completion(c)
- * - complete(c)
- * - wait_for_completion(c)
- */
-struct completion {};
-
-void init_completion(struct completion *c)
-{
- LASSERT(c != NULL);
- (void)c;
-}
-
-void complete(struct completion *c)
-{
- LASSERT(c != NULL);
- (void)c;
-}
-
-void wait_for_completion(struct completion *c)
-{
- LASSERT(c != NULL);
- (void)c;
-}
-
-/*
- * rw_semaphore:
- *
- * - DECLARE_RWSEM(x)
- * - init_rwsem(x)
- * - down_read(x)
- * - up_read(x)
- * - down_write(x)
- * - up_write(x)
- */
-struct rw_semaphore {};
-
-void init_rwsem(struct rw_semaphore *s)
-{
- LASSERT(s != NULL);
- (void)s;
-}
-
-void down_read(struct rw_semaphore *s)
-{
- LASSERT(s != NULL);
- (void)s;
-}
-
-int down_read_trylock(struct rw_semaphore *s)
-{
- LASSERT(s != NULL);
- (void)s;
- return 1;
-}
-
-void down_write(struct rw_semaphore *s)
-{
- LASSERT(s != NULL);
- (void)s;
-}
-
-int down_write_trylock(struct rw_semaphore *s)
-{
- LASSERT(s != NULL);
- (void)s;
- return 1;
-}
-
-void up_read(struct rw_semaphore *s)
-{
- LASSERT(s != NULL);
- (void)s;
-}
-
-void up_write(struct rw_semaphore *s)
-{
- LASSERT(s != NULL);
- (void)s;
-}
-#endif
-
-#ifdef HAVE_LIBPTHREAD
-
-/*
- * Completion
- */
-
-void cfs_init_completion(struct cfs_completion *c)
-{
- LASSERT(c != NULL);
- c->c_done = 0;
- pthread_mutex_init(&c->c_mut, NULL);
- pthread_cond_init(&c->c_cond, NULL);
-}
-
-void cfs_fini_completion(struct cfs_completion *c)
-{
- LASSERT(c != NULL);
- pthread_mutex_destroy(&c->c_mut);
- pthread_cond_destroy(&c->c_cond);
-}
-
-void cfs_complete(struct cfs_completion *c)
-{
- LASSERT(c != NULL);
- pthread_mutex_lock(&c->c_mut);
- c->c_done++;
- pthread_cond_signal(&c->c_cond);
- pthread_mutex_unlock(&c->c_mut);
-}
-
-void cfs_wait_for_completion(struct cfs_completion *c)
-{
- LASSERT(c != NULL);
- pthread_mutex_lock(&c->c_mut);
- while (c->c_done == 0)
- pthread_cond_wait(&c->c_cond, &c->c_mut);
- c->c_done--;
- pthread_mutex_unlock(&c->c_mut);
-}
-
-/*
- * atomic primitives
- */
-
-static pthread_mutex_t atomic_guard_lock = PTHREAD_MUTEX_INITIALIZER;
-
-int cfs_atomic_read(cfs_atomic_t *a)
-{
- int r;
-
- pthread_mutex_lock(&atomic_guard_lock);
- r = a->counter;
- pthread_mutex_unlock(&atomic_guard_lock);
- return r;
-}
-
-void cfs_atomic_set(cfs_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 r;
-
- pthread_mutex_lock(&atomic_guard_lock);
- r = --a->counter;
- pthread_mutex_unlock(&atomic_guard_lock);
- return (r == 0);
-}
-
-void cfs_atomic_inc(cfs_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)
-{
- pthread_mutex_lock(&atomic_guard_lock);
- --a->counter;
- pthread_mutex_unlock(&atomic_guard_lock);
-}
-void cfs_atomic_add(int b, cfs_atomic_t *a)
-
-{
- pthread_mutex_lock(&atomic_guard_lock);
- a->counter += b;
- pthread_mutex_unlock(&atomic_guard_lock);
-}
-
-void cfs_atomic_sub(int b, cfs_atomic_t *a)
-{
- pthread_mutex_lock(&atomic_guard_lock);
- a->counter -= b;
- pthread_mutex_unlock(&atomic_guard_lock);
-}
-
-#endif /* HAVE_LIBPTHREAD */
-
-
-/* !__KERNEL__ */
-#endif
-
-/*
- * Local variables:
- * c-indentation-style: "K&R"
- * c-basic-offset: 8
- * tab-width: 8
- * fill-column: 80
- * scroll-step: 1
- * End:
- */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff