1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 * Ceph - scalable distributed file system
6 * Copyright (C) 2013 Inktank
8 * This is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License version 2.1, as published by the Free Software
11 * Foundation. See file COPYING.
13 * @author Sage Weil <sage@inktank.com>
16 #ifndef CEPH_SPINLOCK_H
17 #define CEPH_SPINLOCK_H
24 #ifdef HAVE_PTHREAD_SPINLOCK
25 pthread_spinlock_t lock;
31 #ifdef HAVE_PTHREAD_SPINLOCK
33 static inline int ceph_spin_init(ceph_spinlock_t *l)
35 return pthread_spin_init(&l->lock, PTHREAD_PROCESS_PRIVATE);
38 static inline int ceph_spin_destroy(ceph_spinlock_t *l)
40 return pthread_spin_destroy(&l->lock);
43 static inline int ceph_spin_lock(ceph_spinlock_t *l)
45 return pthread_spin_lock(&l->lock);
48 static inline int ceph_spin_unlock(ceph_spinlock_t *l)
50 return pthread_spin_unlock(&l->lock);
53 #else /* !HAVE_PTHREAD_SPINLOCK */
55 static inline int ceph_spin_init(ceph_spinlock_t *l)
57 return pthread_mutex_init(&l->lock, NULL);
60 static inline int ceph_spin_destroy(ceph_spinlock_t *l)
62 return pthread_mutex_destroy(&l->lock);
65 static inline int ceph_spin_lock(ceph_spinlock_t *l)
67 return pthread_mutex_lock(&l->lock);
70 static inline int ceph_spin_unlock(ceph_spinlock_t *l)
72 return pthread_mutex_unlock(&l->lock);
78 mutable ceph_spinlock_t _lock;
82 ceph_spin_init(&_lock);
85 ceph_spin_destroy(&_lock);
88 // don't allow copying.
89 void operator=(Spinlock& s);
90 Spinlock(const Spinlock& s);
94 ceph_spin_lock(&_lock);
98 ceph_spin_unlock(&_lock);
102 const Spinlock& spinlock;
104 Locker(const Spinlock& s) : spinlock(s) {