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authorJelmer Vernooij <jelmer@samba.org>2008-10-21 14:51:13 +0200
committerJelmer Vernooij <jelmer@samba.org>2008-10-21 14:51:13 +0200
commit5209a846a9157e649fcdcb561f7eaf19c8c0e465 (patch)
treeb0a7e52b5646c8eec182dbc391e7934b6804488c /lib/util/mutex.h
parent625359b2e266105022309df8985720108ecd6f67 (diff)
parent2ee8d29d22bcb1c350ab59d71b0aee548489bc9c (diff)
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Merge branch 'master' of ssh://git.samba.org/data/git/samba into regsrv
Conflicts: source4/lib/registry/ldb.c source4/rpc_server/winreg/rpc_winreg.c
Diffstat (limited to 'lib/util/mutex.h')
-rw-r--r--lib/util/mutex.h75
1 files changed, 75 insertions, 0 deletions
diff --git a/lib/util/mutex.h b/lib/util/mutex.h
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+++ b/lib/util/mutex.h
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+#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 <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @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_ */