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Diffstat (limited to 'thirdparty/linuxbsd_headers/dbus/dbus-threads.h')
| -rw-r--r-- | thirdparty/linuxbsd_headers/dbus/dbus-threads.h | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/thirdparty/linuxbsd_headers/dbus/dbus-threads.h b/thirdparty/linuxbsd_headers/dbus/dbus-threads.h new file mode 100644 index 0000000000..6d28a0b631 --- /dev/null +++ b/thirdparty/linuxbsd_headers/dbus/dbus-threads.h @@ -0,0 +1,189 @@ +/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ +/* dbus-threads.h D-Bus threads handling + * + * Copyright (C) 2002 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * + */ +#if !defined (DBUS_INSIDE_DBUS_H) && !defined (DBUS_COMPILATION) +#error "Only <dbus/dbus.h> can be included directly, this file may disappear or change contents." +#endif + +#ifndef DBUS_THREADS_H +#define DBUS_THREADS_H + +#include <dbus/dbus-macros.h> +#include <dbus/dbus-types.h> + +DBUS_BEGIN_DECLS + +/** + * @addtogroup DBusThreads + * @{ + */ + +/** An opaque mutex type provided by the #DBusThreadFunctions implementation installed by dbus_threads_init(). */ +typedef struct DBusMutex DBusMutex; +/** An opaque condition variable type provided by the #DBusThreadFunctions implementation installed by dbus_threads_init(). */ +typedef struct DBusCondVar DBusCondVar; + +/** Deprecated, provide DBusRecursiveMutexNewFunction instead. */ +typedef DBusMutex* (* DBusMutexNewFunction) (void); +/** Deprecated, provide DBusRecursiveMutexFreeFunction instead. */ +typedef void (* DBusMutexFreeFunction) (DBusMutex *mutex); +/** Deprecated, provide DBusRecursiveMutexLockFunction instead. Return value is lock success, but gets ignored in practice. */ +typedef dbus_bool_t (* DBusMutexLockFunction) (DBusMutex *mutex); +/** Deprecated, provide DBusRecursiveMutexUnlockFunction instead. Return value is unlock success, but gets ignored in practice. */ +typedef dbus_bool_t (* DBusMutexUnlockFunction) (DBusMutex *mutex); + +/** Creates a new recursively-lockable mutex, or returns #NULL if not + * enough memory. Can only fail due to lack of memory. Found in + * #DBusThreadFunctions. Do not just use PTHREAD_MUTEX_RECURSIVE for + * this, because it does not save/restore the recursion count when + * waiting on a condition. libdbus requires the Java-style behavior + * where the mutex is fully unlocked to wait on a condition. + */ +typedef DBusMutex* (* DBusRecursiveMutexNewFunction) (void); +/** Frees a recursively-lockable mutex. Found in #DBusThreadFunctions. + */ +typedef void (* DBusRecursiveMutexFreeFunction) (DBusMutex *mutex); +/** Locks a recursively-lockable mutex. Found in #DBusThreadFunctions. + * Can only fail due to lack of memory. + */ +typedef void (* DBusRecursiveMutexLockFunction) (DBusMutex *mutex); +/** Unlocks a recursively-lockable mutex. Found in #DBusThreadFunctions. + * Can only fail due to lack of memory. + */ +typedef void (* DBusRecursiveMutexUnlockFunction) (DBusMutex *mutex); + +/** Creates a new condition variable. Found in #DBusThreadFunctions. + * Can only fail (returning #NULL) due to lack of memory. + */ +typedef DBusCondVar* (* DBusCondVarNewFunction) (void); +/** Frees a condition variable. Found in #DBusThreadFunctions. + */ +typedef void (* DBusCondVarFreeFunction) (DBusCondVar *cond); + +/** Waits on a condition variable. Found in + * #DBusThreadFunctions. Must work with either a recursive or + * nonrecursive mutex, whichever the thread implementation + * provides. Note that PTHREAD_MUTEX_RECURSIVE does not work with + * condition variables (does not save/restore the recursion count) so + * don't try using simply pthread_cond_wait() and a + * PTHREAD_MUTEX_RECURSIVE to implement this, it won't work right. + * + * Has no error conditions. Must succeed if it returns. + */ +typedef void (* DBusCondVarWaitFunction) (DBusCondVar *cond, + DBusMutex *mutex); + +/** Waits on a condition variable with a timeout. Found in + * #DBusThreadFunctions. Returns #TRUE if the wait did not + * time out, and #FALSE if it did. + * + * Has no error conditions. Must succeed if it returns. + */ +typedef dbus_bool_t (* DBusCondVarWaitTimeoutFunction) (DBusCondVar *cond, + DBusMutex *mutex, + int timeout_milliseconds); +/** Wakes one waiting thread on a condition variable. Found in #DBusThreadFunctions. + * + * Has no error conditions. Must succeed if it returns. + */ +typedef void (* DBusCondVarWakeOneFunction) (DBusCondVar *cond); + +/** Wakes all waiting threads on a condition variable. Found in #DBusThreadFunctions. + * + * Has no error conditions. Must succeed if it returns. + */ +typedef void (* DBusCondVarWakeAllFunction) (DBusCondVar *cond); + +/** + * Flags indicating which functions are present in #DBusThreadFunctions. Used to allow + * the library to detect older callers of dbus_threads_init() if new possible functions + * are added to #DBusThreadFunctions. + */ +typedef enum +{ + DBUS_THREAD_FUNCTIONS_MUTEX_NEW_MASK = 1 << 0, + DBUS_THREAD_FUNCTIONS_MUTEX_FREE_MASK = 1 << 1, + DBUS_THREAD_FUNCTIONS_MUTEX_LOCK_MASK = 1 << 2, + DBUS_THREAD_FUNCTIONS_MUTEX_UNLOCK_MASK = 1 << 3, + DBUS_THREAD_FUNCTIONS_CONDVAR_NEW_MASK = 1 << 4, + DBUS_THREAD_FUNCTIONS_CONDVAR_FREE_MASK = 1 << 5, + DBUS_THREAD_FUNCTIONS_CONDVAR_WAIT_MASK = 1 << 6, + DBUS_THREAD_FUNCTIONS_CONDVAR_WAIT_TIMEOUT_MASK = 1 << 7, + DBUS_THREAD_FUNCTIONS_CONDVAR_WAKE_ONE_MASK = 1 << 8, + DBUS_THREAD_FUNCTIONS_CONDVAR_WAKE_ALL_MASK = 1 << 9, + DBUS_THREAD_FUNCTIONS_RECURSIVE_MUTEX_NEW_MASK = 1 << 10, + DBUS_THREAD_FUNCTIONS_RECURSIVE_MUTEX_FREE_MASK = 1 << 11, + DBUS_THREAD_FUNCTIONS_RECURSIVE_MUTEX_LOCK_MASK = 1 << 12, + DBUS_THREAD_FUNCTIONS_RECURSIVE_MUTEX_UNLOCK_MASK = 1 << 13, + DBUS_THREAD_FUNCTIONS_ALL_MASK = (1 << 14) - 1 +} DBusThreadFunctionsMask; + +/** + * Functions that must be implemented to make the D-Bus library + * thread-aware. + * + * If you supply both recursive and non-recursive mutexes, + * libdbus will use the non-recursive version for condition variables, + * and the recursive version in other contexts. + * + * The condition variable functions have to work with nonrecursive + * mutexes if you provide those, or with recursive mutexes if you + * don't. + */ +typedef struct +{ + unsigned int mask; /**< Mask indicating which functions are present. */ + + DBusMutexNewFunction mutex_new; /**< Function to create a mutex; optional and deprecated. */ + DBusMutexFreeFunction mutex_free; /**< Function to free a mutex; optional and deprecated. */ + DBusMutexLockFunction mutex_lock; /**< Function to lock a mutex; optional and deprecated. */ + DBusMutexUnlockFunction mutex_unlock; /**< Function to unlock a mutex; optional and deprecated. */ + + DBusCondVarNewFunction condvar_new; /**< Function to create a condition variable */ + DBusCondVarFreeFunction condvar_free; /**< Function to free a condition variable */ + DBusCondVarWaitFunction condvar_wait; /**< Function to wait on a condition */ + DBusCondVarWaitTimeoutFunction condvar_wait_timeout; /**< Function to wait on a condition with a timeout */ + DBusCondVarWakeOneFunction condvar_wake_one; /**< Function to wake one thread waiting on the condition */ + DBusCondVarWakeAllFunction condvar_wake_all; /**< Function to wake all threads waiting on the condition */ + + DBusRecursiveMutexNewFunction recursive_mutex_new; /**< Function to create a recursive mutex */ + DBusRecursiveMutexFreeFunction recursive_mutex_free; /**< Function to free a recursive mutex */ + DBusRecursiveMutexLockFunction recursive_mutex_lock; /**< Function to lock a recursive mutex */ + DBusRecursiveMutexUnlockFunction recursive_mutex_unlock; /**< Function to unlock a recursive mutex */ + + void (* padding1) (void); /**< Reserved for future expansion */ + void (* padding2) (void); /**< Reserved for future expansion */ + void (* padding3) (void); /**< Reserved for future expansion */ + void (* padding4) (void); /**< Reserved for future expansion */ + +} DBusThreadFunctions; + +DBUS_EXPORT +dbus_bool_t dbus_threads_init (const DBusThreadFunctions *functions); +DBUS_EXPORT +dbus_bool_t dbus_threads_init_default (void); + +/** @} */ + +DBUS_END_DECLS + +#endif /* DBUS_THREADS_H */ |