urcu/wfstack.h

   1 #ifndef _URCU_WFSTACK_H
   2 #define _URCU_WFSTACK_H
   3
   4 /*
   5  * wfstack.h
   6  *
   7  * Userspace RCU library - Stack with Wait-Free push, Blocking pop.
   8  *
   9  * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  10  *
  11  * This library is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU Lesser General Public
  13  * License as published by the Free Software Foundation; either
  14  * version 2.1 of the License, or (at your option) any later version.
  15  *
  16  * This library is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * Lesser General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU Lesser General Public
  22  * License along with this library; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  24  */
  25
  26 #include <pthread.h>
  27 #include <assert.h>
  28 #include <urcu/compiler.h>
  29
  30 #ifdef __cplusplus
  31 extern "C" {
  32 #endif
  33
  34 struct wfs_node {
  35         struct wfs_node *next;
  36 };
  37
  38 struct wfs_stack {
  39         struct wfs_node *head;
  40         pthread_mutex_t lock;
  41 };
  42
  43 #ifdef _LGPL_SOURCE
  44
  45 #include <urcu/wfstack-static.h>
  46
  47 #define wfs_node_init           _wfs_node_init
  48 #define wfs_init                _wfs_init
  49 #define wfs_push                _wfs_push
  50 #define __wfs_pop_blocking      ___wfs_pop_blocking
  51 #define wfs_pop_blocking        _wfs_pop_blocking
  52
  53 #else /* !_LGPL_SOURCE */
  54
  55 extern void wfs_node_init(struct wfs_node *node);
  56 extern void wfs_init(struct wfs_stack *s);
  57 extern void wfs_push(struct wfs_stack *s, struct wfs_node *node);
  58 /* __wfs_pop_blocking: caller ensures mutual exclusion between pops */
  59 extern struct wfs_node *__wfs_pop_blocking(struct wfs_stack *s);
  60 extern struct wfs_node *wfs_pop_blocking(struct wfs_stack *s);
  61
  62 #endif /* !_LGPL_SOURCE */
  63
  64 #ifdef __cplusplus
  65 }
  66 #endif
  67
  68 #endif /* _URCU_WFSTACK_H */