struct tevent_timer;
struct tevent_immediate;
struct tevent_signal;
+struct tevent_thread_proxy;
+struct tevent_threaded_context;
/**
* @defgroup tevent The tevent API
*
* @note To cancel the monitoring of a file descriptor, call talloc_free()
* on the object returned by this function.
+ *
+ * @note The caller should avoid closing the file descriptor before
+ * calling talloc_free()! Otherwise the behaviour is undefined which
+ * might result in crashes. See https://bugzilla.samba.org/show_bug.cgi?id=11141
+ * for an example.
*/
struct tevent_fd *tevent_add_fd(struct tevent_context *ev,
TALLOC_CTX *mem_ctx,
#handler, __location__)
#endif
+/**
+ * @brief Set the time a tevent_timer fires
+ *
+ * @param[in] te The timer event to reset
+ *
+ * @param[in] next_event Timeval specifying the absolute time to fire this
+ * event. This is not an offset.
+ */
+void tevent_update_timer(struct tevent_timer *te, struct timeval next_event);
+
#ifdef DOXYGEN
/**
* Initialize an immediate event object
*
* @note To cancel a signal handler, call talloc_free() on the event returned
* from this function.
+ *
+ * @see tevent_num_signals, tevent_sa_info_queue_count
*/
struct tevent_signal *tevent_add_signal(struct tevent_context *ev,
TALLOC_CTX *mem_ctx,
#handler, __location__)
#endif
+/**
+ * @brief the number of supported signals
+ *
+ * This returns value of the configure time TEVENT_NUM_SIGNALS constant.
+ *
+ * The 'signum' argument of tevent_add_signal() must be less than
+ * TEVENT_NUM_SIGNALS.
+ *
+ * @see tevent_add_signal
+ */
+size_t tevent_num_signals(void);
+
+/**
+ * @brief the number of pending realtime signals
+ *
+ * This returns value of TEVENT_SA_INFO_QUEUE_COUNT.
+ *
+ * The tevent internals remember the last TEVENT_SA_INFO_QUEUE_COUNT
+ * siginfo_t structures for SA_SIGINFO signals. If the system generates
+ * more some signals get lost.
+ *
+ * @see tevent_add_signal
+ */
+size_t tevent_sa_info_queue_count(void);
+
#ifdef DOXYGEN
/**
* @brief Pass a single time through the mainloop
/* bits for file descriptor event flags */
/**
- * Monitor a file descriptor for write availability
+ * Monitor a file descriptor for data to be read
*/
#define TEVENT_FD_READ 1
/**
- * Monitor a file descriptor for data to be read
+ * Monitor a file descriptor for writeability
*/
#define TEVENT_FD_WRITE 2
* file descriptor (tevent_add_fd) and timer (tevent_add_timed) events
* are considered too low-level to be used in larger computations. To
* read and write from and to sockets, Samba provides two calls on top
- * of tevent_add_fd: read_packet_send/recv and writev_send/recv. These
- * requests are much easier to compose than the low-level event
+ * of tevent_add_fd: tstream_read_packet_send/recv and tstream_writev_send/recv.
+ * These requests are much easier to compose than the low-level event
* handlers called from tevent_add_fd.
*
* A lot of the simplicity tevent_req has brought to the notoriously
*
* @param[in] req The request to use.
*
- * @return This function returns true is the request is cancelable,
- * othererwise false is returned.
+ * @return This function returns true if the request is
+ * cancelable, otherwise false is returned.
*
* @note Even if the function returns true, the caller need to wait
* for the function to complete normally.
_tevent_req_cancel(req, __location__)
#endif
+/**
+ * @brief A typedef for a cleanup function for a tevent request.
+ *
+ * @param[in] req The tevent request calling this function.
+ *
+ * @param[in] req_state The current tevent_req_state.
+ *
+ */
+typedef void (*tevent_req_cleanup_fn)(struct tevent_req *req,
+ enum tevent_req_state req_state);
+
+/**
+ * @brief This function sets a cleanup function for the given tevent request.
+ *
+ * This function can be used to setup a cleanup function for the given request.
+ * This will be triggered when the tevent_req_done() or tevent_req_error()
+ * function was called, before notifying the callers callback function,
+ * and also before scheduling the deferred trigger.
+ *
+ * This might be useful if more than one tevent_req belong together
+ * and need to finish both requests at the same time.
+ *
+ * The cleanup function is able to call tevent_req_done() or tevent_req_error()
+ * recursively, the cleanup function is only triggered the first time.
+ *
+ * The cleanup function is also called by tevent_req_received()
+ * (possibly triggered from tevent_req_destructor()) before destroying
+ * the private data of the tevent_req.
+ *
+ * @param[in] req The request to use.
+ *
+ * @param[in] fn A pointer to the cancel function.
+ */
+void tevent_req_set_cleanup_fn(struct tevent_req *req, tevent_req_cleanup_fn fn);
+
#ifdef DOXYGEN
/**
* @brief Create an async tevent request.
struct tevent_context *ev,
struct timeval endtime);
+/**
+ * @brief Reset the timer set by tevent_req_set_endtime.
+ *
+ * @param[in] req The request to reset the timeout for
+ */
+void tevent_req_reset_endtime(struct tevent_req *req);
+
#ifdef DOXYGEN
/**
* @brief Call the notify callback of the given tevent request manually.
/* @} */
/**
- * @defgroup tevent_helpers The tevent helper functiions
+ * @defgroup tevent_helpers The tevent helper functions
* @ingroup tevent
*
* @todo description
const struct timeval *tv2);
/**
- * @brief Get a zero timval value.
+ * @brief Get a zero timeval value.
*
- * @return A zero timval value.
+ * @return A zero timeval value.
*/
struct timeval tevent_timeval_zero(void);
/**
* @brief Get a timeval value for the current time.
*
- * @return A timval value with the current time.
+ * @return A timeval value with the current time.
*/
struct timeval tevent_timeval_current(void);
*/
bool tevent_queue_running(struct tevent_queue *queue);
+/**
+ * @brief Create a tevent subrequest that waits in a tevent_queue
+ *
+ * The idea is that always the same syntax for tevent requests.
+ *
+ * @param[in] mem_ctx The talloc memory context to use.
+ *
+ * @param[in] ev The event handle to setup the request.
+ *
+ * @param[in] queue The queue to wait in.
+ *
+ * @return The new subrequest, NULL on error.
+ *
+ * @see tevent_queue_wait_recv()
+ */
+struct tevent_req *tevent_queue_wait_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tevent_queue *queue);
+
+/**
+ * @brief Check if we no longer need to wait in the queue.
+ *
+ * This function needs to be called in the callback function set after calling
+ * tevent_queue_wait_send().
+ *
+ * @param[in] req The tevent request to check.
+ *
+ * @return True on success, false otherwise.
+ *
+ * @see tevent_queue_wait_send()
+ */
+bool tevent_queue_wait_recv(struct tevent_req *req);
+
typedef int (*tevent_nesting_hook)(struct tevent_context *ev,
void *private_data,
uint32_t level,
bool begin,
void *stack_ptr,
const char *location);
+
+/**
+ * @brief Create a tevent_thread_proxy for message passing between threads.
+ *
+ * The tevent_context must have been allocated on the NULL
+ * talloc context, and talloc_disable_null_tracking() must
+ * have been called.
+ *
+ * @param[in] dest_ev_ctx The tevent_context to receive events.
+ *
+ * @return An allocated tevent_thread_proxy, NULL on error.
+ * If tevent was compiled without PTHREAD support
+ * NULL is always returned and errno set to ENOSYS.
+ *
+ * @see tevent_thread_proxy_schedule()
+ */
+struct tevent_thread_proxy *tevent_thread_proxy_create(
+ struct tevent_context *dest_ev_ctx);
+
+/**
+ * @brief Schedule an immediate event on an event context from another thread.
+ *
+ * Causes dest_ev_ctx, being run by another thread, to receive an
+ * immediate event calling the handler with the *pp_private parameter.
+ *
+ * *pp_im must be a pointer to an immediate event talloced on a context owned
+ * by the calling thread, or the NULL context. Ownership will
+ * be transferred to the tevent_thread_proxy and *pp_im will be returned as NULL.
+ *
+ * *pp_private_data must be a talloced area of memory with no destructors.
+ * Ownership of this memory will be transferred to the tevent library and
+ * *pp_private_data will be set to NULL on successful completion of
+ * the call. Set pp_private to NULL if no parameter transfer
+ * needed (a pure callback). This is an asynchronous request, caller
+ * does not wait for callback to be completed before returning.
+ *
+ * @param[in] tp The tevent_thread_proxy to use.
+ *
+ * @param[in] pp_im Pointer to immediate event pointer.
+ *
+ * @param[in] handler The function that will be called.
+ *
+ * @param[in] pp_private_data The talloced memory to transfer.
+ *
+ * @see tevent_thread_proxy_create()
+ */
+void tevent_thread_proxy_schedule(struct tevent_thread_proxy *tp,
+ struct tevent_immediate **pp_im,
+ tevent_immediate_handler_t handler,
+ void *pp_private_data);
+
+/*
+ * @brief Create a context for threaded activation of immediates
+ *
+ * A tevent_treaded_context provides a link into an event
+ * context. Using tevent_threaded_schedule_immediate, it is possible
+ * to activate an immediate event from within a thread.
+ *
+ * It is the duty of the caller of tevent_threaded_context_create() to
+ * keep the event context around longer than any
+ * tevent_threaded_context. tevent will abort if ev is talloc_free'ed
+ * with an active tevent_threaded_context.
+ *
+ * If tevent is build without pthread support, this always returns
+ * NULL with errno=ENOSYS.
+ *
+ * @param[in] mem_ctx The talloc memory context to use.
+ * @param[in] ev The event context to link this to.
+ * @return The threaded context, or NULL with errno set.
+ *
+ * @see tevent_threaded_schedule_immediate()
+ *
+ * @note Available as of tevent 0.9.30
+ */
+struct tevent_threaded_context *tevent_threaded_context_create(
+ TALLOC_CTX *mem_ctx, struct tevent_context *ev);
+
+#ifdef DOXYGEN
+/*
+ * @brief Activate an immediate from a thread
+ *
+ * Activate an immediate from within a thread.
+ *
+ * This routine does not watch out for talloc hierarchies. This means
+ * that it is highly recommended to create the tevent_immediate in the
+ * thread owning tctx, allocate a threaded job description for the
+ * thread, hand over both pointers to a helper thread and not touch it
+ * in the main thread at all anymore.
+ *
+ * tevent_threaded_schedule_immediate is intended as a job completion
+ * indicator for simple threaded helpers.
+ *
+ * Please be aware that tevent_threaded_schedule_immediate is very
+ * picky about its arguments: An immediate may not already be
+ * activated and the handler must exist. With
+ * tevent_threaded_schedule_immediate memory ownership is transferred
+ * to the main thread holding the tevent context behind tctx, the
+ * helper thread can't access it anymore.
+ *
+ * @param[in] tctx The threaded context to go through
+ * @param[in] im The immediate event to activate
+ * @param[in] handler The immediate handler to call in the main thread
+ * @param[in] private_data Pointer for the immediate handler
+ *
+ * @see tevent_threaded_context_create()
+ *
+ * @note Available as of tevent 0.9.30
+ */
+void tevent_threaded_schedule_immediate(struct tevent_threaded_context *tctx,
+ struct tevent_immediate *im,
+ tevent_immediate_handler_t handler,
+ void *private_data);
+#else
+void _tevent_threaded_schedule_immediate(struct tevent_threaded_context *tctx,
+ struct tevent_immediate *im,
+ tevent_immediate_handler_t handler,
+ void *private_data,
+ const char *handler_name,
+ const char *location);
+#define tevent_threaded_schedule_immediate(tctx, im, handler, private_data) \
+ _tevent_threaded_schedule_immediate(tctx, im, handler, private_data, \
+ #handler, __location__);
+#endif
+
#ifdef TEVENT_DEPRECATED
#ifndef _DEPRECATED_
-#if (__GNUC__ >= 3) && (__GNUC_MINOR__ >= 1 )
+#ifdef HAVE___ATTRIBUTE__
#define _DEPRECATED_ __attribute__ ((deprecated))
#else
#define _DEPRECATED_
git.samba.org / nivanova / samba-autobuild / .git / blobdiff