/* -*- mode: C; c-file-style: "gnu" -*- */
/* dbus-threads.h D-Bus threads handling
*
* Copyright (C) 2002, 2003, 2006 Red Hat Inc.
*
* Licensed under the Academic Free License version 2.1
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "dbus-threads.h"
#include "dbus-internals.h"
#include "dbus-threads-internal.h"
#include "dbus-list.h"
static DBusThreadFunctions thread_functions =
{
0,
NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL
};
static int thread_init_generation = 0;
static DBusList *uninitialized_mutex_list = NULL;
static DBusList *uninitialized_condvar_list = NULL;
/** This is used for the no-op default mutex pointer, just to be distinct from #NULL */
#define _DBUS_DUMMY_MUTEX ((DBusMutex*)0xABCDEF)
/** This is used for the no-op default mutex pointer, just to be distinct from #NULL */
#define _DBUS_DUMMY_CONDVAR ((DBusCondVar*)0xABCDEF2)
/**
* @defgroup DBusThreadsInternals Thread functions
* @ingroup DBusInternals
* @brief _dbus_mutex_lock(), etc.
*
* Functions and macros related to threads and thread locks.
*
* @{
*/
/**
* Creates a new mutex using the function supplied to dbus_threads_init(),
* or creates a no-op mutex if threads are not initialized.
* May return #NULL even if threads are initialized, indicating
* out-of-memory.
*
* @returns new mutex or #NULL
*/
DBusMutex*
_dbus_mutex_new (void)
{
if (thread_functions.recursive_mutex_new)
return (* thread_functions.recursive_mutex_new) ();
else if (thread_functions.mutex_new)
return (* thread_functions.mutex_new) ();
else
return _DBUS_DUMMY_MUTEX;
}
/**
* This does the same thing as _dbus_mutex_new. It however
* gives another level of indirection by allocating a pointer
* to point to the mutex location. This allows the threading
* module to swap out dummy mutexes for real a real mutex so libraries
* can initialize threads even after the D-Bus API has been used.
*
* @param location_p the location of the new mutex, can return #NULL on OOM
*/
void
_dbus_mutex_new_at_location (DBusMutex **location_p)
{
_dbus_assert (location_p != NULL);
*location_p = _dbus_mutex_new();
if (thread_init_generation != _dbus_current_generation && *location_p)
{
if (!_dbus_list_append (&uninitialized_mutex_list, location_p))
{
_dbus_mutex_free (*location_p);
*location_p = NULL;
}
}
}
/**
* Frees a mutex created with dbus_mutex_new(); does
* nothing if passed a #NULL pointer.
*/
void
_dbus_mutex_free (DBusMutex *mutex)
{
if (mutex)
{
if (mutex && thread_functions.recursive_mutex_free)
(* thread_functions.recursive_mutex_free) (mutex);
else if (mutex && thread_functions.mutex_free)
(* thread_functions.mutex_free) (mutex);
}
}
/**
* Frees a mutex and removes it from the
* uninitialized_mutex_list;
* does nothing if passed a #NULL pointer.
*/
void
_dbus_mutex_free_at_location (DBusMutex **location_p)
{
if (location_p)
{
if (thread_init_generation != _dbus_current_generation)
_dbus_list_remove (&uninitialized_mutex_list, location_p);
_dbus_mutex_free (*location_p);
}
}
/**
* Locks a mutex. Does nothing if passed a #NULL pointer.
* Locks may be recursive if threading implementation initialized
* recursive locks.
*/
void
_dbus_mutex_lock (DBusMutex *mutex)
{
if (mutex)
{
if (thread_functions.recursive_mutex_lock)
(* thread_functions.recursive_mutex_lock) (mutex);
else if (thread_functions.mutex_lock)
(* thread_functions.mutex_lock) (mutex);
}
}
/**
* Unlocks a mutex. Does nothing if passed a #NULL pointer.
*
* @returns #TRUE on success
*/
void
_dbus_mutex_unlock (DBusMutex *mutex)
{
if (mutex)
{
if (thread_functions.recursive_mutex_unlock)
(* thread_functions.recursive_mutex_unlock) (mutex);
else if (thread_functions.mutex_unlock)
(* thread_functions.mutex_unlock) (mutex);
}
}
/**
* Creates a new condition variable using the function supplied
* to dbus_threads_init(), or creates a no-op condition variable
* if threads are not initialized. May return #NULL even if
* threads are initialized, indicating out-of-memory.
*
* @returns new mutex or #NULL
*/
DBusCondVar *
_dbus_condvar_new (void)
{
if (thread_functions.condvar_new)
return (* thread_functions.condvar_new) ();
else
return _DBUS_DUMMY_CONDVAR;
}
/**
* This does the same thing as _dbus_condvar_new. It however
* gives another level of indirection by allocating a pointer
* to point to the condvar location. This allows the threading
* module to swap out dummy condvars for real a real condvar so libraries
* can initialize threads even after the D-Bus API has been used.
*
* @returns the location of a new condvar or #NULL on OOM
*/
void
_dbus_condvar_new_at_location (DBusCondVar **location_p)
{
*location_p = _dbus_condvar_new();
if (thread_init_generation != _dbus_current_generation && *location_p)
{
if (!_dbus_list_append (&uninitialized_condvar_list, location_p))
{
_dbus_condvar_free (*location_p);
*location_p = NULL;
}
}
}
/**
* Frees a conditional variable created with dbus_condvar_new(); does
* nothing if passed a #NULL pointer.
*/
void
_dbus_condvar_free (DBusCondVar *cond)
{
if (cond && thread_functions.condvar_free)
(* thread_functions.condvar_free) (cond);
}
/**
* Frees a conditional variable and removes it from the
* uninitialized_condvar_list;
* does nothing if passed a #NULL pointer.
*/
void
_dbus_condvar_free_at_location (DBusCondVar **location_p)
{
if (location_p)
{
if (thread_init_generation != _dbus_current_generation)
_dbus_list_remove (&uninitialized_condvar_list, location_p);
_dbus_condvar_free (*location_p);
}
}
/**
* Atomically unlocks the mutex and waits for the conditions
* variable to be signalled. Locks the mutex again before
* returning.
* Does nothing if passed a #NULL pointer.
*/
void
_dbus_condvar_wait (DBusCondVar *cond,
DBusMutex *mutex)
{
if (cond && mutex && thread_functions.condvar_wait)
(* thread_functions.condvar_wait) (cond, mutex);
}
/**
* Atomically unlocks the mutex and waits for the conditions variable
* to be signalled, or for a timeout. Locks the mutex again before
* returning. Does nothing if passed a #NULL pointer. Return value
* is #FALSE if we timed out, #TRUE otherwise.
*
* @param cond the condition variable
* @param mutex the mutex
* @param timeout_milliseconds the maximum time to wait
* @returns #FALSE if the timeout occurred, #TRUE if not
*/
dbus_bool_t
_dbus_condvar_wait_timeout (DBusCondVar *cond,
DBusMutex *mutex,
int timeout_milliseconds)
{
if (cond && mutex && thread_functions.condvar_wait)
return (* thread_functions.condvar_wait_timeout) (cond, mutex, timeout_milliseconds);
else
return TRUE;
}
/**
* If there are threads waiting on the condition variable, wake
* up exactly one.
* Does nothing if passed a #NULL pointer.
*/
void
_dbus_condvar_wake_one (DBusCondVar *cond)
{
if (cond && thread_functions.condvar_wake_one)
(* thread_functions.condvar_wake_one) (cond);
}
/**
* If there are threads waiting on the condition variable, wake
* up all of them.
* Does nothing if passed a #NULL pointer.
*/
void
_dbus_condvar_wake_all (DBusCondVar *cond)
{
if (cond && thread_functions.condvar_wake_all)
(* thread_functions.condvar_wake_all) (cond);
}
static void
shutdown_global_locks (void *data)
{
DBusMutex ***locks = data;
int i;
i = 0;
while (i < _DBUS_N_GLOBAL_LOCKS)
{
_dbus_mutex_free (*(locks[i]));
*(locks[i]) = NULL;
++i;
}
dbus_free (locks);
}
static void
shutdown_uninitialized_locks (void *data)
{
_dbus_list_clear (&uninitialized_mutex_list);
_dbus_list_clear (&uninitialized_condvar_list);
}
static dbus_bool_t
init_uninitialized_locks (void)
{
DBusList *link;
_dbus_assert (thread_init_generation != _dbus_current_generation);
link = uninitialized_mutex_list;
while (link != NULL)
{
DBusMutex **mp;
mp = (DBusMutex **)link->data;
_dbus_assert (*mp == _DBUS_DUMMY_MUTEX);
*mp = _dbus_mutex_new ();
if (*mp == NULL)
goto fail_mutex;
link = _dbus_list_get_next_link (&uninitialized_mutex_list, link);
}
link = uninitialized_condvar_list;
while (link != NULL)
{
DBusCondVar **cp;
cp = (DBusCondVar **)link->data;
_dbus_assert (*cp == _DBUS_DUMMY_CONDVAR);
*cp = _dbus_condvar_new ();
if (*cp == NULL)
goto fail_condvar;
link = _dbus_list_get_next_link (&uninitialized_condvar_list, link);
}
_dbus_list_clear (&uninitialized_mutex_list);
_dbus_list_clear (&uninitialized_condvar_list);
if (!_dbus_register_shutdown_func (shutdown_uninitialized_locks,
NULL))
goto fail_condvar;
return TRUE;
fail_condvar:
link = uninitialized_condvar_list;
while (link != NULL)
{
DBusCondVar **cp;
cp = (DBusCondVar **)link->data;
if (*cp != _DBUS_DUMMY_CONDVAR)
_dbus_condvar_free (*cp);
else
break;
*cp = _DBUS_DUMMY_CONDVAR;
link = _dbus_list_get_next_link (&uninitialized_condvar_list, link);
}
fail_mutex:
link = uninitialized_mutex_list;
while (link != NULL)
{
DBusMutex **mp;
mp = (DBusMutex **)link->data;
if (*mp != _DBUS_DUMMY_MUTEX)
_dbus_mutex_free (*mp);
else
break;
*mp = _DBUS_DUMMY_MUTEX;
link = _dbus_list_get_next_link (&uninitialized_mutex_list, link);
}
return FALSE;
}
static dbus_bool_t
init_locks (void)
{
int i;
DBusMutex ***dynamic_global_locks;
DBusMutex **global_locks[] = {
#define LOCK_ADDR(name) (& _dbus_lock_##name)
LOCK_ADDR (win_fds),
LOCK_ADDR (sid_atom_cache),
LOCK_ADDR (list),
LOCK_ADDR (connection_slots),
LOCK_ADDR (pending_call_slots),
LOCK_ADDR (server_slots),
LOCK_ADDR (message_slots),
LOCK_ADDR (atomic),
LOCK_ADDR (bus),
LOCK_ADDR (bus_datas),
LOCK_ADDR (shutdown_funcs),
LOCK_ADDR (system_users),
LOCK_ADDR (message_cache),
LOCK_ADDR (shared_connections),
LOCK_ADDR (machine_uuid)
#undef LOCK_ADDR
};
_dbus_assert (_DBUS_N_ELEMENTS (global_locks) ==
_DBUS_N_GLOBAL_LOCKS);
i = 0;
dynamic_global_locks = dbus_new (DBusMutex**, _DBUS_N_GLOBAL_LOCKS);
if (dynamic_global_locks == NULL)
goto failed;
while (i < _DBUS_N_ELEMENTS (global_locks))
{
*global_locks[i] = _dbus_mutex_new ();
if (*global_locks[i] == NULL)
goto failed;
dynamic_global_locks[i] = global_locks[i];
++i;
}
if (!_dbus_register_shutdown_func (shutdown_global_locks,
dynamic_global_locks))
goto failed;
if (!init_uninitialized_locks ())
goto failed;
return TRUE;
failed:
dbus_free (dynamic_global_locks);
for (i = i - 1; i >= 0; i--)
{
_dbus_mutex_free (*global_locks[i]);
*global_locks[i] = NULL;
}
return FALSE;
}
/** @} */ /* end of internals */
/**
* @defgroup DBusThreads Thread functions
* @ingroup DBus
* @brief dbus_threads_init() and dbus_threads_init_default()
*
* Functions and macros related to threads and thread locks.
*
* If threads are initialized, the D-Bus library has locks on all
* global data structures. In addition, each #DBusConnection has a
* lock, so only one thread at a time can touch the connection. (See
* @ref DBusConnection for more on connection locking.)
*
* Most other objects, however, do not have locks - they can only be
* used from a single thread at a time, unless you lock them yourself.
* For example, a #DBusMessage can't be modified from two threads
* at once.
*
* @{
*/
/**
*
* Initializes threads. If this function is not called, the D-Bus
* library will not lock any data structures. If it is called, D-Bus
* will do locking, at some cost in efficiency. Note that this
* function must be called BEFORE the second thread is started.
*
* Almost always, you should use dbus_threads_init_default() instead.
* The raw dbus_threads_init() is only useful if you require a
* particular thread implementation for some reason.
*
* A possible reason to use dbus_threads_init() rather than
* dbus_threads_init_default() is to insert debugging checks or print
* statements.
*
* dbus_threads_init() may be called more than once. The first one
* wins and subsequent calls are ignored. (Unless you use
* dbus_shutdown() to reset libdbus, which will let you re-init
* threads.)
*
* Either recursive or nonrecursive mutex functions must be specified,
* but not both. New code should provide only the recursive functions
* - specifying the nonrecursive ones is deprecated.
*
* Because this function effectively sets global state, all code
* running in a given application must agree on the thread
* implementation. Most code won't care which thread implementation is
* used, so there's no problem. However, usually libraries should not
* call dbus_threads_init() or dbus_threads_init_default(), instead
* leaving this policy choice to applications.
*
* The exception is for application frameworks (GLib, Qt, etc.) and
* D-Bus bindings based on application frameworks. These frameworks
* define a cross-platform thread abstraction and can assume
* applications using the framework are OK with using that thread
* abstraction.
*
* However, even these app frameworks may find it easier to simply call
* dbus_threads_init_default(), and there's no reason they shouldn't.
*
* @param functions functions for using threads
* @returns #TRUE on success, #FALSE if no memory
*/
dbus_bool_t
dbus_threads_init (const DBusThreadFunctions *functions)
{
dbus_bool_t mutex_set;
dbus_bool_t recursive_mutex_set;
_dbus_assert (functions != NULL);
/* these base functions are required. Future additions to
* DBusThreadFunctions may be optional.
*/
_dbus_assert (functions->mask & DBUS_THREAD_FUNCTIONS_CONDVAR_NEW_MASK);
_dbus_assert (functions->mask & DBUS_THREAD_FUNCTIONS_CONDVAR_FREE_MASK);
_dbus_assert (functions->mask & DBUS_THREAD_FUNCTIONS_CONDVAR_WAIT_MASK);
_dbus_assert (functions->mask & DBUS_THREAD_FUNCTIONS_CONDVAR_WAIT_TIMEOUT_MASK);
_dbus_assert (functions->mask & DBUS_THREAD_FUNCTIONS_CONDVAR_WAKE_ONE_MASK);
_dbus_assert (functions->mask & DBUS_THREAD_FUNCTIONS_CONDVAR_WAKE_ALL_MASK);
_dbus_assert (functions->condvar_new != NULL);
_dbus_assert (functions->condvar_free != NULL);
_dbus_assert (functions->condvar_wait != NULL);
_dbus_assert (functions->condvar_wait_timeout != NULL);
_dbus_assert (functions->condvar_wake_one != NULL);
_dbus_assert (functions->condvar_wake_all != NULL);
/* Either the mutex function set or recursive mutex set needs
* to be available but not both
*/
mutex_set = (functions->mask & DBUS_THREAD_FUNCTIONS_MUTEX_NEW_MASK) &&
(functions->mask & DBUS_THREAD_FUNCTIONS_MUTEX_FREE_MASK) &&
(functions->mask & DBUS_THREAD_FUNCTIONS_MUTEX_LOCK_MASK) &&
(functions->mask & DBUS_THREAD_FUNCTIONS_MUTEX_UNLOCK_MASK) &&
functions->mutex_new &&
functions->mutex_free &&
functions->mutex_lock &&
functions->mutex_unlock;
recursive_mutex_set =
(functions->mask & DBUS_THREAD_FUNCTIONS_RECURSIVE_MUTEX_NEW_MASK) &&
(functions->mask & DBUS_THREAD_FUNCTIONS_RECURSIVE_MUTEX_FREE_MASK) &&
(functions->mask & DBUS_THREAD_FUNCTIONS_RECURSIVE_MUTEX_LOCK_MASK) &&
(functions->mask & DBUS_THREAD_FUNCTIONS_RECURSIVE_MUTEX_UNLOCK_MASK) &&
functions->recursive_mutex_new &&
functions->recursive_mutex_free &&
functions->recursive_mutex_lock &&
functions->recursive_mutex_unlock;
if (!(mutex_set || recursive_mutex_set))
_dbus_assert_not_reached ("Either the nonrecusrive or recursive mutex "
"functions sets should be passed into "
"dbus_threads_init. Neither sets were passed.");
if (mutex_set && recursive_mutex_set)
_dbus_assert_not_reached ("Either the nonrecusrive or recursive mutex "
"functions sets should be passed into "
"dbus_threads_init. Both sets were passed. "
"You most likely just want to set the recursive "
"mutex functions to avoid deadlocks in D-Bus.");
/* Check that all bits in the mask actually are valid mask bits.
* ensures people won't write code that breaks when we add
* new bits.
*/
_dbus_assert ((functions->mask & ~DBUS_THREAD_FUNCTIONS_ALL_MASK) == 0);
if (thread_init_generation != _dbus_current_generation)
thread_functions.mask = 0; /* allow re-init in new generation */
/* Silently allow multiple init
* First init wins and D-Bus will always use its threading system
*/
if (thread_functions.mask != 0)
return TRUE;
thread_functions.mutex_new = functions->mutex_new;
thread_functions.mutex_free = functions->mutex_free;
thread_functions.mutex_lock = functions->mutex_lock;
thread_functions.mutex_unlock = functions->mutex_unlock;
thread_functions.condvar_new = functions->condvar_new;
thread_functions.condvar_free = functions->condvar_free;
thread_functions.condvar_wait = functions->condvar_wait;
thread_functions.condvar_wait_timeout = functions->condvar_wait_timeout;
thread_functions.condvar_wake_one = functions->condvar_wake_one;
thread_functions.condvar_wake_all = functions->condvar_wake_all;
if (functions->mask & DBUS_THREAD_FUNCTIONS_RECURSIVE_MUTEX_NEW_MASK)
thread_functions.recursive_mutex_new = functions->recursive_mutex_new;
if (functions->mask & DBUS_THREAD_FUNCTIONS_RECURSIVE_MUTEX_FREE_MASK)
thread_functions.recursive_mutex_free = functions->recursive_mutex_free;
if (functions->mask & DBUS_THREAD_FUNCTIONS_RECURSIVE_MUTEX_LOCK_MASK)
thread_functions.recursive_mutex_lock = functions->recursive_mutex_lock;
if (functions->mask & DBUS_THREAD_FUNCTIONS_RECURSIVE_MUTEX_UNLOCK_MASK)
thread_functions.recursive_mutex_unlock = functions->recursive_mutex_unlock;
thread_functions.mask = functions->mask;
if (!init_locks ())
return FALSE;
thread_init_generation = _dbus_current_generation;
return TRUE;
}
/* Default thread implemenation */
/**
*
* Calls dbus_threads_init() with a default set of
* #DBusThreadFunctions appropriate for the platform.
*
* Most applications should use this rather than dbus_threads_init().
*
* It's safe to call dbus_threads_init_default() as many times as you
* want, but only the first time will have an effect.
*
* dbus_shutdown() reverses the effects of this function when it
* resets all global state in libdbus.
*
* @returns #TRUE on success, #FALSE if not enough memory
*/
dbus_bool_t
dbus_threads_init_default (void)
{
return _dbus_threads_init_platform_specific ();
}
/** @} */
#ifdef DBUS_BUILD_TESTS
/** Fake mutex used for debugging */
typedef struct DBusFakeMutex DBusFakeMutex;
/** Fake mutex used for debugging */
struct DBusFakeMutex
{
dbus_bool_t locked; /**< Mutex is "locked" */
};
static DBusMutex * dbus_fake_mutex_new (void);
static void dbus_fake_mutex_free (DBusMutex *mutex);
static dbus_bool_t dbus_fake_mutex_lock (DBusMutex *mutex);
static dbus_bool_t dbus_fake_mutex_unlock (DBusMutex *mutex);
static DBusCondVar* dbus_fake_condvar_new (void);
static void dbus_fake_condvar_free (DBusCondVar *cond);
static void dbus_fake_condvar_wait (DBusCondVar *cond,
DBusMutex *mutex);
static dbus_bool_t dbus_fake_condvar_wait_timeout (DBusCondVar *cond,
DBusMutex *mutex,
int timeout_msec);
static void dbus_fake_condvar_wake_one (DBusCondVar *cond);
static void dbus_fake_condvar_wake_all (DBusCondVar *cond);
static const DBusThreadFunctions fake_functions =
{
DBUS_THREAD_FUNCTIONS_MUTEX_NEW_MASK |
DBUS_THREAD_FUNCTIONS_MUTEX_FREE_MASK |
DBUS_THREAD_FUNCTIONS_MUTEX_LOCK_MASK |
DBUS_THREAD_FUNCTIONS_MUTEX_UNLOCK_MASK |
DBUS_THREAD_FUNCTIONS_CONDVAR_NEW_MASK |
DBUS_THREAD_FUNCTIONS_CONDVAR_FREE_MASK |
DBUS_THREAD_FUNCTIONS_CONDVAR_WAIT_MASK |
DBUS_THREAD_FUNCTIONS_CONDVAR_WAIT_TIMEOUT_MASK |
DBUS_THREAD_FUNCTIONS_CONDVAR_WAKE_ONE_MASK|
DBUS_THREAD_FUNCTIONS_CONDVAR_WAKE_ALL_MASK,
dbus_fake_mutex_new,
dbus_fake_mutex_free,
dbus_fake_mutex_lock,
dbus_fake_mutex_unlock,
dbus_fake_condvar_new,
dbus_fake_condvar_free,
dbus_fake_condvar_wait,
dbus_fake_condvar_wait_timeout,
dbus_fake_condvar_wake_one,
dbus_fake_condvar_wake_all
};
static DBusMutex *
dbus_fake_mutex_new (void)
{
DBusFakeMutex *mutex;
mutex = dbus_new0 (DBusFakeMutex, 1);
return (DBusMutex *)mutex;
}
static void
dbus_fake_mutex_free (DBusMutex *mutex)
{
DBusFakeMutex *fake = (DBusFakeMutex*) mutex;
_dbus_assert (!fake->locked);
dbus_free (fake);
}
static dbus_bool_t
dbus_fake_mutex_lock (DBusMutex *mutex)
{
DBusFakeMutex *fake = (DBusFakeMutex*) mutex;
_dbus_assert (!fake->locked);
fake->locked = TRUE;
return TRUE;
}
static dbus_bool_t
dbus_fake_mutex_unlock (DBusMutex *mutex)
{
DBusFakeMutex *fake = (DBusFakeMutex*) mutex;
_dbus_assert (fake->locked);
fake->locked = FALSE;
return TRUE;
}
static DBusCondVar*
dbus_fake_condvar_new (void)
{
return (DBusCondVar*) _dbus_strdup ("FakeCondvar");
}
static void
dbus_fake_condvar_free (DBusCondVar *cond)
{
dbus_free (cond);
}
static void
dbus_fake_condvar_wait (DBusCondVar *cond,
DBusMutex *mutex)
{
}
static dbus_bool_t
dbus_fake_condvar_wait_timeout (DBusCondVar *cond,
DBusMutex *mutex,
int timeout_msec)
{
return TRUE;
}
static void
dbus_fake_condvar_wake_one (DBusCondVar *cond)
{
}
static void
dbus_fake_condvar_wake_all (DBusCondVar *cond)
{
}
dbus_bool_t
_dbus_threads_init_debug (void)
{
return dbus_threads_init (&fake_functions);
}
#endif /* DBUS_BUILD_TESTS */