LCOV - code coverage report
Current view: top level - include/linux - srcu.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 1 1 100.0 %
Date: 2017-01-25 Functions: 0 0 -

          Line data    Source code
       1             : /*
       2             :  * Sleepable Read-Copy Update mechanism for mutual exclusion
       3             :  *
       4             :  * This program is free software; you can redistribute it and/or modify
       5             :  * it under the terms of the GNU General Public License as published by
       6             :  * the Free Software Foundation; either version 2 of the License, or
       7             :  * (at your option) any later version.
       8             :  *
       9             :  * This program is distributed in the hope that it will be useful,
      10             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      11             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      12             :  * GNU General Public License for more details.
      13             :  *
      14             :  * You should have received a copy of the GNU General Public License
      15             :  * along with this program; if not, write to the Free Software
      16             :  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
      17             :  *
      18             :  * Copyright (C) IBM Corporation, 2006
      19             :  *
      20             :  * Author: Paul McKenney <paulmck@us.ibm.com>
      21             :  *
      22             :  * For detailed explanation of Read-Copy Update mechanism see -
      23             :  *              Documentation/RCU/ *.txt
      24             :  *
      25             :  */
      26             : 
      27             : #ifndef _LINUX_SRCU_H
      28             : #define _LINUX_SRCU_H
      29             : 
      30             : struct srcu_struct_array {
      31             :         int c[2];
      32             : };
      33             : 
      34             : struct srcu_struct {
      35             :         int completed;
      36             :         struct srcu_struct_array *per_cpu_ref;
      37             :         struct mutex mutex;
      38             : };
      39             : 
      40             : #ifndef CONFIG_PREEMPT
      41             : #define srcu_barrier() barrier()
      42             : #else /* #ifndef CONFIG_PREEMPT */
      43             : #define srcu_barrier()
      44             : #endif /* #else #ifndef CONFIG_PREEMPT */
      45             : 
      46             : int init_srcu_struct(struct srcu_struct *sp);
      47             : void cleanup_srcu_struct(struct srcu_struct *sp);
      48             : int srcu_read_lock(struct srcu_struct *sp) __acquires(sp);
      49             : void srcu_read_unlock(struct srcu_struct *sp, int idx) __releases(sp);
      50             : void synchronize_srcu(struct srcu_struct *sp);
      51             : void synchronize_srcu_expedited(struct srcu_struct *sp);
      52             : long srcu_batches_completed(struct srcu_struct *sp);
      53           1 : 
      54             : #endif

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