library/lock.h

   1 /*
   2  * 2008+ Copyright (c) Evgeniy Polyakov <zbr@ioremap.net>
   3  * All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #ifndef __DNET_LOCK_H
  17 #define __DNET_LOCK_H
  18
  19 #include <pthread.h>
  20
  21 #ifdef HAVE_PTHREAD_SPINLOCK
  22 struct dnet_lock {
  23         pthread_spinlock_t      lock;
  24 };
  25
  26 static inline int dnet_lock_init(struct dnet_lock *l)
  27 {
  28         return -pthread_spin_init(&l->lock, 0);
  29 }
  30
  31 static inline void dnet_lock_destroy(struct dnet_lock *l)
  32 {
  33         pthread_spin_destroy(&l->lock);
  34 }
  35
  36 static inline void dnet_lock_lock(struct dnet_lock *l)
  37 {
  38         pthread_spin_lock(&l->lock);
  39 }
  40
  41 static inline void dnet_lock_unlock(struct dnet_lock *l)
  42 {
  43         pthread_spin_unlock(&l->lock);
  44 }
  45 #else
  46 struct dnet_lock {
  47         pthread_mutex_t         lock;
  48 };
  49
  50 static inline int dnet_lock_init(struct dnet_lock *l)
  51 {
  52         return -pthread_mutex_init(&l->lock, NULL);
  53 }
  54
  55 static inline void dnet_lock_destroy(struct dnet_lock *l)
  56 {
  57         pthread_mutex_destroy(&l->lock);
  58 }
  59
  60 static inline void dnet_lock_lock(struct dnet_lock *l)
  61 {
  62         pthread_mutex_lock(&l->lock);
  63 }
  64
  65 static inline void dnet_lock_unlock(struct dnet_lock *l)
  66 {
  67         pthread_mutex_unlock(&l->lock);
  68 }
  69 #endif
  70
  71 #endif /* __DNET_LOCK_H */