1 /* -*- mode: C; c-file-style: "gnu" -*- */
2 /* dbus-threads.h D-Bus threads handling
4 * Copyright (C) 2002 Red Hat Inc.
6 * Licensed under the Academic Free License version 2.1
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #if !defined (DBUS_INSIDE_DBUS_H) && !defined (DBUS_COMPILATION)
24 #error "Only <dbus/dbus.h> can be included directly, this file may disappear or change contents."
27 #ifndef DBUS_THREADS_H
28 #define DBUS_THREADS_H
30 #include <dbus/dbus-macros.h>
31 #include <dbus/dbus-types.h>
36 * @addtogroup DBusThreads
40 /** An opaque mutex type provided by the #DBusThreadFunctions implementation installed by dbus_threads_init(). */
41 typedef struct DBusMutex DBusMutex;
42 /** An opaque condition variable type provided by the #DBusThreadFunctions implementation installed by dbus_threads_init(). */
43 typedef struct DBusCondVar DBusCondVar;
45 /** Deprecated, provide DBusRecursiveMutexNewFunction instead. */
46 typedef DBusMutex* (* DBusMutexNewFunction) (void);
47 /** Deprecated, provide DBusRecursiveMutexFreeFunction instead. */
48 typedef void (* DBusMutexFreeFunction) (DBusMutex *mutex);
49 /** Deprecated, provide DBusRecursiveMutexLockFunction instead. */
50 typedef dbus_bool_t (* DBusMutexLockFunction) (DBusMutex *mutex);
51 /** Deprecated, provide DBusRecursiveMutexUnlockFunction instead. */
52 typedef dbus_bool_t (* DBusMutexUnlockFunction) (DBusMutex *mutex);
54 /** Creates a new recursively-lockable mutex, or returns #NULL if not enough memory.
55 * Found in #DBusThreadFunctions
57 typedef DBusMutex* (* DBusRecursiveMutexNewFunction) (void);
58 /** Frees a recursively-lockable mutex. Found in #DBusThreadFunctions.
60 typedef void (* DBusRecursiveMutexFreeFunction) (DBusMutex *mutex);
61 /** Locks a recursively-lockable mutex. Found in #DBusThreadFunctions.
63 typedef void (* DBusRecursiveMutexLockFunction) (DBusMutex *mutex);
64 /** Unlocks a recursively-lockable mutex. Found in #DBusThreadFunctions.
66 typedef void (* DBusRecursiveMutexUnlockFunction) (DBusMutex *mutex);
68 /** Creates a new condition variable. Found in #DBusThreadFunctions.
70 typedef DBusCondVar* (* DBusCondVarNewFunction) (void);
71 /** Frees a condition variable. Found in #DBusThreadFunctions.
73 typedef void (* DBusCondVarFreeFunction) (DBusCondVar *cond);
74 /** Waits on a condition variable. Found in #DBusThreadFunctions.
76 typedef void (* DBusCondVarWaitFunction) (DBusCondVar *cond,
78 /** Waits on a condition variable with a timeout. Found in #DBusThreadFunctions.
80 typedef dbus_bool_t (* DBusCondVarWaitTimeoutFunction) (DBusCondVar *cond,
82 int timeout_milliseconds);
83 /** Wakes one waiting thread on a condition variable. Found in #DBusThreadFunctions.
85 typedef void (* DBusCondVarWakeOneFunction) (DBusCondVar *cond);
86 /** Wakes all waiting threads on a condition variable. Found in #DBusThreadFunctions.
88 typedef void (* DBusCondVarWakeAllFunction) (DBusCondVar *cond);
91 * Flags indicating which functions are present in #DBusThreadFunctions. Used to allow
92 * the library to detect older callers of dbus_threads_init() if new possible functions
93 * are added to #DBusThreadFunctions.
97 DBUS_THREAD_FUNCTIONS_MUTEX_NEW_MASK = 1 << 0,
98 DBUS_THREAD_FUNCTIONS_MUTEX_FREE_MASK = 1 << 1,
99 DBUS_THREAD_FUNCTIONS_MUTEX_LOCK_MASK = 1 << 2,
100 DBUS_THREAD_FUNCTIONS_MUTEX_UNLOCK_MASK = 1 << 3,
101 DBUS_THREAD_FUNCTIONS_CONDVAR_NEW_MASK = 1 << 4,
102 DBUS_THREAD_FUNCTIONS_CONDVAR_FREE_MASK = 1 << 5,
103 DBUS_THREAD_FUNCTIONS_CONDVAR_WAIT_MASK = 1 << 6,
104 DBUS_THREAD_FUNCTIONS_CONDVAR_WAIT_TIMEOUT_MASK = 1 << 7,
105 DBUS_THREAD_FUNCTIONS_CONDVAR_WAKE_ONE_MASK = 1 << 8,
106 DBUS_THREAD_FUNCTIONS_CONDVAR_WAKE_ALL_MASK = 1 << 9,
107 DBUS_THREAD_FUNCTIONS_RECURSIVE_MUTEX_NEW_MASK = 1 << 10,
108 DBUS_THREAD_FUNCTIONS_RECURSIVE_MUTEX_FREE_MASK = 1 << 11,
109 DBUS_THREAD_FUNCTIONS_RECURSIVE_MUTEX_LOCK_MASK = 1 << 12,
110 DBUS_THREAD_FUNCTIONS_RECURSIVE_MUTEX_UNLOCK_MASK = 1 << 13,
111 DBUS_THREAD_FUNCTIONS_ALL_MASK = (1 << 13) - 1
112 } DBusThreadFunctionsMask;
115 * Functions that must be implemented to make the D-Bus library
116 * thread-aware. The recursive mutex functions should be specified
117 * rather than the old, deprecated nonrecursive ones.
121 unsigned int mask; /**< Mask indicating which functions are present. */
123 DBusMutexNewFunction mutex_new; /**< Function to create a mutex; optional and deprecated. */
124 DBusMutexFreeFunction mutex_free; /**< Function to free a mutex; optional and deprecated. */
125 DBusMutexLockFunction mutex_lock; /**< Function to lock a mutex; optional and deprecated. */
126 DBusMutexUnlockFunction mutex_unlock; /**< Function to unlock a mutex; optional and deprecated. */
128 DBusCondVarNewFunction condvar_new; /**< Function to create a condition variable */
129 DBusCondVarFreeFunction condvar_free; /**< Function to free a condition variable */
130 DBusCondVarWaitFunction condvar_wait; /**< Function to wait on a condition */
131 DBusCondVarWaitTimeoutFunction condvar_wait_timeout; /**< Function to wait on a condition with a timeout */
132 DBusCondVarWakeOneFunction condvar_wake_one; /**< Function to wake one thread waiting on the condition */
133 DBusCondVarWakeAllFunction condvar_wake_all; /**< Function to wake all threads waiting on the condition */
135 DBusRecursiveMutexNewFunction recursive_mutex_new; /**< Function to create a recursive mutex */
136 DBusRecursiveMutexFreeFunction recursive_mutex_free; /**< Function to free a recursive mutex */
137 DBusRecursiveMutexLockFunction recursive_mutex_lock; /**< Function to lock a recursive mutex */
138 DBusRecursiveMutexUnlockFunction recursive_mutex_unlock; /**< Function to unlock a recursive mutex */
140 void (* padding1) (void); /**< Reserved for future expansion */
141 void (* padding2) (void); /**< Reserved for future expansion */
142 void (* padding3) (void); /**< Reserved for future expansion */
143 void (* padding4) (void); /**< Reserved for future expansion */
145 } DBusThreadFunctions;
147 dbus_bool_t dbus_threads_init (const DBusThreadFunctions *functions);
148 dbus_bool_t dbus_threads_init_default (void);
154 #endif /* DBUS_THREADS_H */