/*
 * This file is part of gtkD.
 *
 * gtkD is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version, with
 * some exceptions, please read the COPYING file.
 *
 * gtkD 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with gtkD; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA
 */

// generated automatically - do not change
// find conversion definition on APILookup.txt
// implement new conversion functionalities on the wrap.utils pakage


module gio.DatagramBasedIF;

private import gio.Cancellable;
private import glib.ErrorG;
private import glib.GException;
private import glib.Source;
private import gtkc.gio;
public  import gtkc.giotypes;


/**
 * A #GDatagramBased is a networking interface for representing datagram-based
 * communications. It is a more or less direct mapping of the core parts of the
 * BSD socket API in a portable GObject interface. It is implemented by
 * #GSocket, which wraps the UNIX socket API on UNIX and winsock2 on Windows.
 * 
 * #GDatagramBased is entirely platform independent, and is intended to be used
 * alongside higher-level networking APIs such as #GIOStream.
 * 
 * It uses vectored scatter/gather I/O by default, allowing for many messages
 * to be sent or received in a single call. Where possible, implementations of
 * the interface should take advantage of vectored I/O to minimise processing
 * or system calls. For example, #GSocket uses recvmmsg() and sendmmsg() where
 * possible. Callers should take advantage of scatter/gather I/O (the use of
 * multiple buffers per message) to avoid unnecessary copying of data to
 * assemble or disassemble a message.
 * 
 * Each #GDatagramBased operation has a timeout parameter which may be negative
 * for blocking behaviour, zero for non-blocking behaviour, or positive for
 * timeout behaviour. A blocking operation blocks until finished or there is an
 * error. A non-blocking operation will return immediately with a
 * %G_IO_ERROR_WOULD_BLOCK error if it cannot make progress. A timeout operation
 * will block until the operation is complete or the timeout expires; if the
 * timeout expires it will return what progress it made, or
 * %G_IO_ERROR_TIMED_OUT if no progress was made. To know when a call would
 * successfully run you can call g_datagram_based_condition_check() or
 * g_datagram_based_condition_wait(). You can also use
 * g_datagram_based_create_source() and attach it to a #GMainContext to get
 * callbacks when I/O is possible.
 * 
 * When running a non-blocking operation applications should always be able to
 * handle getting a %G_IO_ERROR_WOULD_BLOCK error even when some other function
 * said that I/O was possible. This can easily happen in case of a race
 * condition in the application, but it can also happen for other reasons. For
 * instance, on Windows a socket is always seen as writable until a write
 * returns %G_IO_ERROR_WOULD_BLOCK.
 * 
 * As with #GSocket, #GDatagramBaseds can be either connection oriented (for
 * example, SCTP) or connectionless (for example, UDP). #GDatagramBaseds must be
 * datagram-based, not stream-based. The interface does not cover connection
 * establishment — use methods on the underlying type to establish a connection
 * before sending and receiving data through the #GDatagramBased API. For
 * connectionless socket types the target/source address is specified or
 * received in each I/O operation.
 * 
 * Like most other APIs in GLib, #GDatagramBased is not inherently thread safe.
 * To use a #GDatagramBased concurrently from multiple threads, you must
 * implement your own locking.
 *
 * Since: 2.48
 */
public interface DatagramBasedIF{
	/** Get the main Gtk struct */
	public GDatagramBased* getDatagramBasedStruct();

	/** the main Gtk struct as a void* */
	protected void* getStruct();


	/**
	 * Checks on the readiness of @datagram_based to perform operations. The
	 * operations specified in @condition are checked for and masked against the
	 * currently-satisfied conditions on @datagram_based. The result is returned.
	 *
	 * %G_IO_IN will be set in the return value if data is available to read with
	 * g_datagram_based_receive_messages(), or if the connection is closed remotely
	 * (EOS); and if the datagram_based has not been closed locally using some
	 * implementation-specific method (such as g_socket_close() or
	 * g_socket_shutdown() with @shutdown_read set, if it’s a #GSocket).
	 *
	 * If the connection is shut down or closed (by calling g_socket_close() or
	 * g_socket_shutdown() with @shutdown_read set, if it’s a #GSocket, for
	 * example), all calls to this function will return %G_IO_ERROR_CLOSED.
	 *
	 * %G_IO_OUT will be set if it is expected that at least one byte can be sent
	 * using g_datagram_based_send_messages() without blocking. It will not be set
	 * if the datagram_based has been closed locally.
	 *
	 * %G_IO_HUP will be set if the connection has been closed locally.
	 *
	 * %G_IO_ERR will be set if there was an asynchronous error in transmitting data
	 * previously enqueued using g_datagram_based_send_messages().
	 *
	 * Note that on Windows, it is possible for an operation to return
	 * %G_IO_ERROR_WOULD_BLOCK even immediately after
	 * g_datagram_based_condition_check() has claimed that the #GDatagramBased is
	 * ready for writing. Rather than calling g_datagram_based_condition_check() and
	 * then writing to the #GDatagramBased if it succeeds, it is generally better to
	 * simply try writing right away, and try again later if the initial attempt
	 * returns %G_IO_ERROR_WOULD_BLOCK.
	 *
	 * It is meaningless to specify %G_IO_ERR or %G_IO_HUP in @condition; these
	 * conditions will always be set in the output if they are true. Apart from
	 * these flags, the output is guaranteed to be masked by @condition.
	 *
	 * This call never blocks.
	 *
	 * Params:
	 *     condition = a #GIOCondition mask to check
	 *
	 * Return: the #GIOCondition mask of the current state
	 *
	 * Since: 2.48
	 */
	public GIOCondition conditionCheck(GIOCondition condition);

	/**
	 * Waits for up to @timeout microseconds for condition to become true on
	 * @datagram_based. If the condition is met, %TRUE is returned.
	 *
	 * If @cancellable is cancelled before the condition is met, or if @timeout is
	 * reached before the condition is met, then %FALSE is returned and @error is
	 * set appropriately (%G_IO_ERROR_CANCELLED or %G_IO_ERROR_TIMED_OUT).
	 *
	 * Params:
	 *     condition = a #GIOCondition mask to wait for
	 *     timeout = the maximum time (in microseconds) to wait, 0 to not block, or -1
	 *         to block indefinitely
	 *     cancellable = a #GCancellable
	 *
	 * Return: %TRUE if the condition was met, %FALSE otherwise
	 *
	 * Since: 2.48
	 *
	 * Throws: GException on failure.
	 */
	public bool conditionWait(GIOCondition condition, long timeout, Cancellable cancellable);

	/**
	 * Creates a #GSource that can be attached to a #GMainContext to monitor for
	 * the availability of the specified @condition on the #GDatagramBased. The
	 * #GSource keeps a reference to the @datagram_based.
	 *
	 * The callback on the source is of the #GDatagramBasedSourceFunc type.
	 *
	 * It is meaningless to specify %G_IO_ERR or %G_IO_HUP in @condition; these
	 * conditions will always be reported in the callback if they are true.
	 *
	 * If non-%NULL, @cancellable can be used to cancel the source, which will
	 * cause the source to trigger, reporting the current condition (which is
	 * likely 0 unless cancellation happened at the same time as a condition
	 * change). You can check for this in the callback using
	 * g_cancellable_is_cancelled().
	 *
	 * Params:
	 *     condition = a #GIOCondition mask to monitor
	 *     cancellable = a #GCancellable
	 *
	 * Return: a newly allocated #GSource
	 *
	 * Since: 2.48
	 */
	public Source createSource(GIOCondition condition, Cancellable cancellable);

	/**
	 * Receive one or more data messages from @datagram_based in one go.
	 *
	 * @messages must point to an array of #GInputMessage structs and
	 * @num_messages must be the length of this array. Each #GInputMessage
	 * contains a pointer to an array of #GInputVector structs describing the
	 * buffers that the data received in each message will be written to.
	 *
	 * @flags modify how all messages are received. The commonly available
	 * arguments for this are available in the #GSocketMsgFlags enum, but the
	 * values there are the same as the system values, and the flags
	 * are passed in as-is, so you can pass in system-specific flags too. These
	 * flags affect the overall receive operation. Flags affecting individual
	 * messages are returned in #GInputMessage.flags.
	 *
	 * The other members of #GInputMessage are treated as described in its
	 * documentation.
	 *
	 * If @timeout is negative the call will block until @num_messages have been
	 * received, the connection is closed remotely (EOS), @cancellable is cancelled,
	 * or an error occurs.
	 *
	 * If @timeout is 0 the call will return up to @num_messages without blocking,
	 * or %G_IO_ERROR_WOULD_BLOCK if no messages are queued in the operating system
	 * to be received.
	 *
	 * If @timeout is positive the call will block on the same conditions as if
	 * @timeout were negative. If the timeout is reached
	 * before any messages are received, %G_IO_ERROR_TIMED_OUT is returned,
	 * otherwise it will return the number of messages received before timing out.
	 * (Note: This is effectively the behaviour of `MSG_WAITFORONE` with
	 * recvmmsg().)
	 *
	 * To be notified when messages are available, wait for the %G_IO_IN condition.
	 * Note though that you may still receive %G_IO_ERROR_WOULD_BLOCK from
	 * g_datagram_based_receive_messages() even if you were previously notified of a
	 * %G_IO_IN condition.
	 *
	 * If the remote peer closes the connection, any messages queued in the
	 * underlying receive buffer will be returned, and subsequent calls to
	 * g_datagram_based_receive_messages() will return 0 (with no error set).
	 *
	 * If the connection is shut down or closed (by calling g_socket_close() or
	 * g_socket_shutdown() with @shutdown_read set, if it’s a #GSocket, for
	 * example), all calls to this function will return %G_IO_ERROR_CLOSED.
	 *
	 * On error -1 is returned and @error is set accordingly. An error will only
	 * be returned if zero messages could be received; otherwise the number of
	 * messages successfully received before the error will be returned. If
	 * @cancellable is cancelled, %G_IO_ERROR_CANCELLED is returned as with any
	 * other error.
	 *
	 * Params:
	 *     messages = an array of #GInputMessage structs
	 *     numMessages = the number of elements in @messages
	 *     flags = an int containing #GSocketMsgFlags flags for the overall operation
	 *     timeout = the maximum time (in microseconds) to wait, 0 to not block, or -1
	 *         to block indefinitely
	 *     cancellable = a %GCancellable
	 *
	 * Return: number of messages received, or -1 on error. Note that the number
	 *     of messages received may be smaller than @num_messages if @timeout is
	 *     zero or positive, if the peer closed the connection, or if @num_messages
	 *     was larger than `UIO_MAXIOV` (1024), in which case the caller may re-try
	 *     to receive the remaining messages.
	 *
	 * Since: 2.48
	 *
	 * Throws: GException on failure.
	 */
	public int receiveMessages(GInputMessage[] messages, int flags, long timeout, Cancellable cancellable);

	/**
	 * Send one or more data messages from @datagram_based in one go.
	 *
	 * @messages must point to an array of #GOutputMessage structs and
	 * @num_messages must be the length of this array. Each #GOutputMessage
	 * contains an address to send the data to, and a pointer to an array of
	 * #GOutputVector structs to describe the buffers that the data to be sent
	 * for each message will be gathered from.
	 *
	 * @flags modify how the message is sent. The commonly available arguments
	 * for this are available in the #GSocketMsgFlags enum, but the
	 * values there are the same as the system values, and the flags
	 * are passed in as-is, so you can pass in system-specific flags too.
	 *
	 * The other members of #GOutputMessage are treated as described in its
	 * documentation.
	 *
	 * If @timeout is negative the call will block until @num_messages have been
	 * sent, @cancellable is cancelled, or an error occurs.
	 *
	 * If @timeout is 0 the call will send up to @num_messages without blocking,
	 * or will return %G_IO_ERROR_WOULD_BLOCK if there is no space to send messages.
	 *
	 * If @timeout is positive the call will block on the same conditions as if
	 * @timeout were negative. If the timeout is reached before any messages are
	 * sent, %G_IO_ERROR_TIMED_OUT is returned, otherwise it will return the number
	 * of messages sent before timing out.
	 *
	 * To be notified when messages can be sent, wait for the %G_IO_OUT condition.
	 * Note though that you may still receive %G_IO_ERROR_WOULD_BLOCK from
	 * g_datagram_based_send_messages() even if you were previously notified of a
	 * %G_IO_OUT condition. (On Windows in particular, this is very common due to
	 * the way the underlying APIs work.)
	 *
	 * If the connection is shut down or closed (by calling g_socket_close() or
	 * g_socket_shutdown() with @shutdown_write set, if it’s a #GSocket, for
	 * example), all calls to this function will return %G_IO_ERROR_CLOSED.
	 *
	 * On error -1 is returned and @error is set accordingly. An error will only
	 * be returned if zero messages could be sent; otherwise the number of messages
	 * successfully sent before the error will be returned. If @cancellable is
	 * cancelled, %G_IO_ERROR_CANCELLED is returned as with any other error.
	 *
	 * Params:
	 *     messages = an array of #GOutputMessage structs
	 *     numMessages = the number of elements in @messages
	 *     flags = an int containing #GSocketMsgFlags flags
	 *     timeout = the maximum time (in microseconds) to wait, 0 to not block, or -1
	 *         to block indefinitely
	 *     cancellable = a %GCancellable
	 *
	 * Return: number of messages sent, or -1 on error. Note that the number of
	 *     messages sent may be smaller than @num_messages if @timeout is zero
	 *     or positive, or if @num_messages was larger than `UIO_MAXIOV` (1024), in
	 *     which case the caller may re-try to send the remaining messages.
	 *
	 * Since: 2.48
	 *
	 * Throws: GException on failure.
	 */
	public int sendMessages(GOutputMessage[] messages, int flags, long timeout, Cancellable cancellable);
}