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192 lines
6.7 KiB
C
192 lines
6.7 KiB
C
/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright (C) 2008 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include "gsocketaddressenumerator.h"
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#include "glibintl.h"
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#include "gsimpleasyncresult.h"
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#include "gioalias.h"
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G_DEFINE_ABSTRACT_TYPE (GSocketAddressEnumerator, g_socket_address_enumerator, G_TYPE_OBJECT);
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static void g_socket_address_enumerator_real_next_async (GSocketAddressEnumerator *enumerator,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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static GSocketAddress *g_socket_address_enumerator_real_next_finish (GSocketAddressEnumerator *enumerator,
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GAsyncResult *result,
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GError **error);
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static void
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g_socket_address_enumerator_init (GSocketAddressEnumerator *enumerator)
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{
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}
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static void
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g_socket_address_enumerator_class_init (GSocketAddressEnumeratorClass *enumerator_class)
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{
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enumerator_class->next_async = g_socket_address_enumerator_real_next_async;
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enumerator_class->next_finish = g_socket_address_enumerator_real_next_finish;
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}
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/**
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* g_socket_address_enumerator_next:
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* @enumerator: a #GSocketAddressEnumerator
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* @cancellable: optional #GCancellable object, %NULL to ignore.
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* @error: a #GError.
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*
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* Retrieves the next #GSocketAddress from @enumerator. Note that this
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* may block for some amount of time. (Eg, a #GNetworkAddress may need
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* to do a DNS lookup before it can return an address.) Use
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* g_socket_address_enumerator_next_async() if you need to avoid
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* blocking.
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*
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* If @enumerator is expected to yield addresses, but for some reason
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* is unable to (eg, because of a DNS error), then the first call to
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* g_socket_address_enumerator_next() will return an appropriate error
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* in *@error. However, if the first call to
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* g_socket_address_enumerator_next() succeeds, then any further
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* internal errors (other than @cancellable being triggered) will be
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* ignored.
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*
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* Return value: a #GSocketAddress (owned by the caller), or %NULL on
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* error (in which case *@error will be set) or if there are no
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* more addresses.
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*/
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GSocketAddress *
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g_socket_address_enumerator_next (GSocketAddressEnumerator *enumerator,
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GCancellable *cancellable,
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GError **error)
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{
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GSocketAddressEnumeratorClass *klass;
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g_return_val_if_fail (G_IS_SOCKET_ADDRESS_ENUMERATOR (enumerator), NULL);
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klass = G_SOCKET_ADDRESS_ENUMERATOR_GET_CLASS (enumerator);
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return (* klass->next) (enumerator, cancellable, error);
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}
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/* Default implementation just calls the synchronous method; this can
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* be used if the implementation already knows all of its addresses,
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* and so the synchronous method will never block.
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*/
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static void
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g_socket_address_enumerator_real_next_async (GSocketAddressEnumerator *enumerator,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data)
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{
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GSimpleAsyncResult *result;
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GSocketAddress *address;
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GError *error = NULL;
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result = g_simple_async_result_new (G_OBJECT (enumerator),
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callback, user_data,
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g_socket_address_enumerator_real_next_async);
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address = g_socket_address_enumerator_next (enumerator, cancellable, &error);
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if (address)
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g_simple_async_result_set_op_res_gpointer (result, address, NULL);
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else if (error)
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{
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g_simple_async_result_set_from_error (result, error);
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g_error_free (error);
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}
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g_simple_async_result_complete_in_idle (result);
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g_object_unref (result);
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}
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/**
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* g_socket_address_enumerator_next_async:
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* @enumerator: a #GSocketAddressEnumerator
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* @cancellable: optional #GCancellable object, %NULL to ignore.
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* @callback: a #GAsyncReadyCallback to call when the request is satisfied
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* @user_data: the data to pass to callback function
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*
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* Asynchronously retrieves the next #GSocketAddress from @enumerator
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* and then calls @callback, which must call
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* g_socket_address_enumerator_next_finish() to get the result.
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*/
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void
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g_socket_address_enumerator_next_async (GSocketAddressEnumerator *enumerator,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data)
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{
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GSocketAddressEnumeratorClass *klass;
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g_return_if_fail (G_IS_SOCKET_ADDRESS_ENUMERATOR (enumerator));
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klass = G_SOCKET_ADDRESS_ENUMERATOR_GET_CLASS (enumerator);
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(* klass->next_async) (enumerator, cancellable, callback, user_data);
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}
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static GSocketAddress *
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g_socket_address_enumerator_real_next_finish (GSocketAddressEnumerator *enumerator,
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GAsyncResult *result,
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GError **error)
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{
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GSimpleAsyncResult *simple;
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g_return_val_if_fail (G_IS_SIMPLE_ASYNC_RESULT (result), NULL);
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simple = G_SIMPLE_ASYNC_RESULT (result);
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g_return_val_if_fail (g_simple_async_result_get_source_tag (simple) == g_socket_address_enumerator_real_next_async, NULL);
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if (g_simple_async_result_propagate_error (simple, error))
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return NULL;
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else
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return g_simple_async_result_get_op_res_gpointer (simple);
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}
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/**
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* g_socket_address_enumerator_next_finish:
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* @enumerator: a #GSocketAddressEnumerator
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* @result: a #GAsyncResult
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* @error: a #GError
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*
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* Retrieves the result of a completed call to
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* g_socket_address_enumerator_next_async(). See
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* g_socket_address_enumerator_next() for more information about
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* error handling.
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*
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* Return value: a #GSocketAddress (owned by the caller), or %NULL on
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* error (in which case *@error will be set) or if there are no
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* more addresses.
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*/
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GSocketAddress *
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g_socket_address_enumerator_next_finish (GSocketAddressEnumerator *enumerator,
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GAsyncResult *result,
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GError **error)
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{
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GSocketAddressEnumeratorClass *klass;
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g_return_val_if_fail (G_IS_SOCKET_ADDRESS_ENUMERATOR (enumerator), NULL);
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klass = G_SOCKET_ADDRESS_ENUMERATOR_GET_CLASS (enumerator);
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return (* klass->next_finish) (enumerator, result, error);
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}
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#define __G_SOCKET_ADDRESS_ENUMERATOR_C__
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#include "gioaliasdef.c"
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