From caa4e428604780bb098060f7286c69d30c8b4007 Mon Sep 17 00:00:00 2001 From: Jelmer Vernooij Date: Sat, 11 Oct 2008 21:05:38 +0200 Subject: Move lib/util from source4 to top-level libutil. Conflicts: source4/Makefile --- lib/util/mutex.h | 75 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 lib/util/mutex.h (limited to 'lib/util/mutex.h') diff --git a/lib/util/mutex.h b/lib/util/mutex.h new file mode 100644 index 0000000000..bf845906f2 --- /dev/null +++ b/lib/util/mutex.h @@ -0,0 +1,75 @@ +#ifndef _MUTEX_H_ +#define _MUTEX_H_ +/* + Unix SMB/CIFS implementation. + Samba mutex functions + Copyright (C) Andrew Tridgell 2003 + Copyright (C) James J Myers 2003 + + 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 3 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, see . +*/ + +/** + * @file + * @brief Mutex operations + */ + +struct mutex_ops; + +/* To add a new read/write lock, add it to enum rwlock_id + */ +enum rwlock_id { RWLOCK_SMBD, /* global smbd lock */ + + RWLOCK_MAX /* this MUST be kept last */ +}; + +#define MUTEX_LOCK_BY_ID(mutex_index) smb_mutex_lock_by_id(mutex_index, #mutex_index) +#define MUTEX_UNLOCK_BY_ID(mutex_index) smb_mutex_unlock_by_id(mutex_index, #mutex_index) +#define MUTEX_INIT(mutex, name) smb_mutex_init(mutex, #name) +#define MUTEX_DESTROY(mutex, name) smb_mutex_destroy(mutex, #name) +#define MUTEX_LOCK(mutex, name) smb_mutex_lock(mutex, #name) +#define MUTEX_UNLOCK(mutex, name) smb_mutex_unlock(mutex, #name) + +#define RWLOCK_INIT(rwlock, name) smb_rwlock_init(rwlock, #name) +#define RWLOCK_DESTROY(rwlock, name) smb_rwlock_destroy(rwlock, #name) +#define RWLOCK_LOCK_WRITE(rwlock, name) smb_rwlock_lock_write(rwlock, #name) +#define RWLOCK_LOCK_READ(rwlock, name) smb_rwlock_lock_read(rwlock, #name) +#define RWLOCK_UNLOCK(rwlock, name) smb_rwlock_unlock(rwlock, #name) + + + +/* this null typedef ensures we get the types right and avoids the + pitfalls of void* */ +typedef struct smb_mutex { + void *mutex; +} smb_mutex_t; +typedef struct { + void *rwlock; +} smb_rwlock_t; + +/* the mutex model operations structure - contains function pointers to + the model-specific implementations of each operation */ +struct mutex_ops { + int (*mutex_init)(smb_mutex_t *mutex, const char *name); + int (*mutex_lock)(smb_mutex_t *mutex, const char *name); + int (*mutex_unlock)(smb_mutex_t *mutex, const char *name); + int (*mutex_destroy)(smb_mutex_t *mutex, const char *name); + int (*rwlock_init)(smb_rwlock_t *rwlock, const char *name); + int (*rwlock_lock_write)(smb_rwlock_t *rwlock, const char *name); + int (*rwlock_lock_read)(smb_rwlock_t *rwlock, const char *name); + int (*rwlock_unlock)(smb_rwlock_t *rwlock, const char *name); + int (*rwlock_destroy)(smb_rwlock_t *rwlock, const char *name); +}; + +#endif /* endif _MUTEX_H_ */ -- cgit