From 6fa44063041765df752cdcf81ae990e47a37681a Mon Sep 17 00:00:00 2001 From: dimitri staessens Date: Fri, 13 May 2016 19:34:29 +0200 Subject: lib: implementation of read/write locks This adds read/write locks, allowing for concurrent reads on the locked datastructure. This is needed for the fast path. --- include/ouroboros/CMakeLists.txt | 1 + include/ouroboros/rw_lock.h | 41 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 42 insertions(+) create mode 100644 include/ouroboros/rw_lock.h (limited to 'include') diff --git a/include/ouroboros/CMakeLists.txt b/include/ouroboros/CMakeLists.txt index a42c65fd..f1276f51 100644 --- a/include/ouroboros/CMakeLists.txt +++ b/include/ouroboros/CMakeLists.txt @@ -16,6 +16,7 @@ set(HEADER_FILES irm.h list.h logs.h + rw_lock.h shm_ap_rbuff.h shm_du_map.h sockets.h diff --git a/include/ouroboros/rw_lock.h b/include/ouroboros/rw_lock.h new file mode 100644 index 00000000..03eee605 --- /dev/null +++ b/include/ouroboros/rw_lock.h @@ -0,0 +1,41 @@ +/* + * Ouroboros - Copyright (C) 2016 + * + * Read/Write locks + * + * Dimitri Staessens + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef OUROBOROS_RWLOCK_H +#define OUROBOROS_RWLOCK_H + +#include +#include + +typedef struct rw_lock { + pthread_mutex_t lock; + pthread_mutex_t i_lock; + int i; +} rw_lock_t; + +int rw_lock_init(rw_lock_t * lock); +void rw_lock_destroy(rw_lock_t * lock); +int rw_lock_rdlock(rw_lock_t * lock); +int rw_lock_wrlock(rw_lock_t * lock); +int rw_lock_unlock(rw_lock_t * lock); + +#endif /* OUROBOROS_RWLOCK_H */ -- cgit v1.2.3