/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ /* * Copyright (C) 2007 Collabora Ltd. * @author: Xavier Claessens * Copyright (C) 2007 Marco Barisione * * This library 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 2.1 of the License, or (at your option) any later version. * * This library 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 this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "empathy-file.h" #include "empathy-contact-factory.h" #include "empathy-marshal.h" #include "empathy-time.h" #include "empathy-utils.h" #define DEBUG_FLAG EMPATHY_DEBUG_FT #include "empathy-debug.h" /** * SECTION:empathy-file * @short_description: File channel * @see_also: #EmpathyFile, #EmpathyContact, empathy_send_file() * @include: libempthy/empathy-file.h * * The #EmpathyFile object represents a Telepathy file channel. */ /** * EMPATHY_FILE_UNKNOWN_SIZE: * * Value used for the "size" or "estimated-size" properties when the size of * the transferred file is unknown. */ static void empathy_file_class_init (EmpathyFileClass *klass); static void empathy_file_init (EmpathyFile *file); static void file_finalize (GObject *object); static GObject * file_constructor (GType type, guint n_props, GObjectConstructParam *props); static void file_get_property (GObject *object, guint param_id, GValue *value, GParamSpec *pspec); static void file_set_property (GObject *object, guint param_id, const GValue *value, GParamSpec *pspec); static void file_destroy_cb (TpChannel *file_chan, EmpathyFile *file); static void file_closed_cb (TpChannel *file_chan, EmpathyFile *file, GObject *weak_object); static void file_state_changed_cb (DBusGProxy *file_iface, guint state, guint reason, EmpathyFile *file); static void file_transferred_bytes_changed_cb (DBusGProxy *file_iface, guint64 transferred_bytes, EmpathyFile *file); static void copy_stream (GInputStream *in, GOutputStream *out, GCancellable *cancellable); /* EmpathyFile object */ #define GET_PRIV(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), \ EMPATHY_TYPE_FILE, EmpathyFilePriv)) typedef struct _EmpathyFilePriv EmpathyFilePriv; struct _EmpathyFilePriv { EmpathyContactFactory *factory; McAccount *account; gchar *id; MissionControl *mc; TpChannel *channel; /* Previously in File/FT struct */ EmpathyFile *cached_empathy_file; EmpathyContact *contact; GInputStream *in_stream; GOutputStream *out_stream; gchar *filename; EmpFileTransferDirection direction; EmpFileTransferState state; EmpFileTransferStateChangeReason state_change_reason; guint64 size; guint64 transferred_bytes; gint64 start_time; gchar *unix_socket_path; gchar *content_md5; gchar *content_type; gchar *description; GCancellable *cancellable; }; enum { PROP_0, PROP_ACCOUNT, PROP_CHANNEL, PROP_STATE, PROP_DIRECTION, PROP_FILENAME, PROP_SIZE, PROP_CONTENT_TYPE, PROP_CONTENT_MD5, PROP_IN_STREAM, }; G_DEFINE_TYPE (EmpathyFile, empathy_file, G_TYPE_OBJECT); static void empathy_file_class_init (EmpathyFileClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); object_class->finalize = file_finalize; object_class->constructor = file_constructor; object_class->get_property = file_get_property; object_class->set_property = file_set_property; /* Construct-only properties */ g_object_class_install_property (object_class, PROP_ACCOUNT, g_param_spec_object ("account", "channel Account", "The account associated with the channel", MC_TYPE_ACCOUNT, G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY)); g_object_class_install_property (object_class, PROP_CHANNEL, g_param_spec_object ("channel", "telepathy channel", "The file transfer channel", TP_TYPE_CHANNEL, G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY)); g_object_class_install_property (object_class, PROP_STATE, g_param_spec_uint ("state", "state of the transfer", "The file transfer state", 0, G_MAXUINT, G_MAXUINT, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); g_object_class_install_property (object_class, PROP_DIRECTION, g_param_spec_uint ("direction", "direction of the transfer", "The file transfer direction", 0, G_MAXUINT, G_MAXUINT, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); g_object_class_install_property (object_class, PROP_FILENAME, g_param_spec_string ("filename", "name of the transfer", "The file transfer filename", "", G_PARAM_READWRITE)); g_object_class_install_property (object_class, PROP_SIZE, g_param_spec_uint64 ("size", "size of the file", "The file transfer size", 0, G_MAXUINT64, G_MAXUINT64, G_PARAM_READWRITE)); g_object_class_install_property (object_class, PROP_CONTENT_TYPE, g_param_spec_string ("content-type", "file transfer content-type", "The file transfer content-type", "", G_PARAM_READWRITE)); g_object_class_install_property (object_class, PROP_CONTENT_MD5, g_param_spec_string ("content-md5", "file transfer md5sum", "The md5 sum of the transfer's contents", "", G_PARAM_READWRITE)); g_object_class_install_property (object_class, PROP_IN_STREAM, g_param_spec_object ("in-stream", "transfer input stream", "The input stream for file transfer", G_TYPE_INPUT_STREAM, G_PARAM_READWRITE)); g_type_class_add_private (object_class, sizeof (EmpathyFilePriv)); } static void empathy_file_init (EmpathyFile *file) { } static void file_finalize (GObject *object) { EmpathyFilePriv *priv; EmpathyFile *file; file = EMPATHY_FILE (object); priv = GET_PRIV (file); if (priv->channel) { DEBUG ("Closing channel.."); g_signal_handlers_disconnect_by_func (priv->channel, file_destroy_cb, object); tp_cli_channel_run_close (priv->channel, -1, NULL, NULL); if (G_IS_OBJECT (priv->channel)) g_object_unref (priv->channel); } if (priv->factory) { g_object_unref (priv->factory); } if (priv->account) { g_object_unref (priv->account); } if (priv->mc) { g_object_unref (priv->mc); } g_free (priv->id); g_free (priv->filename); g_free (priv->unix_socket_path); g_free (priv->description); g_free (priv->content_md5); g_free (priv->content_type); if (priv->in_stream) g_object_unref (priv->in_stream); if (priv->out_stream) g_object_unref (priv->out_stream); if (priv->contact) g_object_unref (priv->contact); if (priv->cancellable) g_object_unref (priv->cancellable); G_OBJECT_CLASS (empathy_file_parent_class)->finalize (object); } static GObject * file_constructor (GType type, guint n_props, GObjectConstructParam *props) { GObject *file; EmpathyFilePriv *priv; GError *error = NULL; GHashTable *properties; TpHandle handle; file = G_OBJECT_CLASS (empathy_file_parent_class)->constructor (type, n_props, props); priv = GET_PRIV (file); priv->factory = empathy_contact_factory_new (); priv->mc = empathy_mission_control_new (); tp_cli_channel_connect_to_closed (priv->channel, (tp_cli_channel_signal_callback_closed) file_closed_cb, file, NULL, NULL, NULL); emp_cli_channel_type_file_connect_to_file_transfer_state_changed (TP_PROXY (priv->channel), (emp_cli_channel_type_file_signal_callback_file_transfer_state_changed) file_state_changed_cb, file, NULL, NULL, NULL); emp_cli_channel_type_file_connect_to_transferred_bytes_changed (TP_PROXY (priv->channel), (emp_cli_channel_type_file_signal_callback_transferred_bytes_changed) file_transferred_bytes_changed_cb, file, NULL, NULL, NULL); handle = tp_channel_get_handle (priv->channel, NULL); priv->contact = empathy_contact_factory_get_from_handle (priv->factory, priv->account, (guint) handle); if (!tp_cli_dbus_properties_run_get_all (priv->channel, -1, EMP_IFACE_CHANNEL_TYPE_FILE, &properties, &error, NULL)) { DEBUG ("Failed to get properties: %s", error ? error->message : "No error given"); g_clear_error (&error); return NULL; } priv->size = g_value_get_uint64 (g_hash_table_lookup (properties, "Size")); priv->state = g_value_get_uint (g_hash_table_lookup (properties, "State")); /* Invalid reason, so empathy_file_get_state_change_reason() can give * a warning if called for a not closed file transfer. */ priv->state_change_reason = -1; priv->transferred_bytes = g_value_get_uint64 (g_hash_table_lookup (properties, "TransferredBytes")); priv->filename = g_value_dup_string (g_hash_table_lookup (properties, "Filename")); priv->content_md5 = g_value_dup_string (g_hash_table_lookup (properties, "ContentMD5")); priv->description = g_value_dup_string (g_hash_table_lookup (properties, "Description")); priv->unix_socket_path = g_value_dup_string (g_hash_table_lookup (properties, "SocketPath")); priv->direction = g_value_get_uint (g_hash_table_lookup (properties, "Direction")); g_hash_table_destroy (properties); return file; } static void file_get_property (GObject *object, guint param_id, GValue *value, GParamSpec *pspec) { EmpathyFilePriv *priv; EmpathyFile *file; priv = GET_PRIV (object); file = EMPATHY_FILE (object); switch (param_id) { case PROP_ACCOUNT: g_value_set_object (value, priv->account); break; case PROP_CHANNEL: g_value_set_object (value, priv->channel); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec); break; }; } static void file_channel_set_dbus_property (gpointer proxy, const gchar *property, const GValue *value) { DEBUG ("Setting %s property", property); tp_cli_dbus_properties_run_set (TP_PROXY (proxy), -1, EMP_IFACE_CHANNEL_TYPE_FILE, property, value, NULL, NULL); DEBUG ("done"); } static void file_set_property (GObject *object, guint param_id, const GValue *value, GParamSpec *pspec) { EmpathyFilePriv *priv; priv = GET_PRIV (object); switch (param_id) { case PROP_ACCOUNT: priv->account = g_object_ref (g_value_get_object (value)); break; case PROP_CHANNEL: priv->channel = g_object_ref (g_value_get_object (value)); break; case PROP_STATE: priv->state = g_value_get_uint (value); break; case PROP_DIRECTION: priv->direction = g_value_get_uint (value); break; case PROP_FILENAME: g_free (priv->filename); priv->filename = g_value_dup_string (value); file_channel_set_dbus_property (priv->channel, "Filename", value); break; case PROP_SIZE: priv->size = g_value_get_uint64 (value); file_channel_set_dbus_property (priv->channel, "Size", value); break; case PROP_CONTENT_TYPE: file_channel_set_dbus_property (priv->channel, "ContentType", value); g_free (priv->content_type); priv->content_type = g_value_dup_string (value); break; case PROP_CONTENT_MD5: file_channel_set_dbus_property (priv->channel, "ContentMD5", value); g_free (priv->content_md5); priv->content_md5 = g_value_dup_string (value); break; case PROP_IN_STREAM: if (priv->in_stream) g_object_unref (priv->in_stream); priv->in_stream = g_object_ref (g_value_get_object (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec); break; }; } /** * empathy_file_new: * @account: the #McAccount for the channel * @channel: a Telepathy channel * * Creates a new #EmpathyFile wrapping @channel. * * Returns: a new #EmpathyFile */ EmpathyFile * empathy_file_new (McAccount *account, TpChannel *channel) { return g_object_new (EMPATHY_TYPE_FILE, "account", account, "channel", channel, NULL); } /** * empathy_file_get_id: * @tp_file: an #EmpathyFile * * Returns the ID of @file. * * Returns: the ID */ const gchar * empathy_file_get_id (EmpathyFile *file) { EmpathyFilePriv *priv; g_return_val_if_fail (EMPATHY_IS_FILE (file), NULL); priv = GET_PRIV (file); return priv->id; } /** * empathy_file_get_channel * @file: an #EmpathyFile * * Returns the Telepathy file transfer channel * * Returns: the #TpChannel */ TpChannel * empathy_file_get_channel (EmpathyFile *file) { EmpathyFilePriv *priv; g_return_val_if_fail (EMPATHY_IS_FILE (file), NULL); priv = GET_PRIV (file); return priv->channel; } /** * empathy_file_accept: * @file: an #EmpathyFile * * Accepts a file transfer that's in the "local pending" state (i.e. * EMP_FILE_TRANSFER_STATE_LOCAL_PENDING). */ void empathy_file_accept (EmpathyFile *file) { EmpathyFilePriv *priv; g_return_if_fail (EMPATHY_IS_FILE (file)); /* TODO: accept file here */ if (priv) ; } static void file_destroy_cb (TpChannel *file_channel, EmpathyFile *file) { EmpathyFilePriv *priv; priv = GET_PRIV (file); DEBUG ("Channel Closed or CM crashed"); g_object_unref (priv->channel); priv->channel = NULL; } static void file_closed_cb (TpChannel *file_channel, EmpathyFile *file, GObject *weak_object) { EmpathyFilePriv *priv; priv = GET_PRIV (file); /* The channel is closed, do just like if the proxy was destroyed */ g_signal_handlers_disconnect_by_func (priv->channel, file_destroy_cb, file); file_destroy_cb (file_channel, file); } static gint64 get_time_msec (void) { GTimeVal tv; g_get_current_time (&tv); return ((gint64) tv.tv_sec) * 1000 + tv.tv_usec / 1000; } static gint _get_local_socket (EmpathyFile *file) { gint fd; size_t path_len; struct sockaddr_un addr; EmpathyFilePriv *priv; GValue *socket_path; priv = GET_PRIV (file); /* TODO: This could probably be a little nicer. */ tp_cli_dbus_properties_run_get (priv->channel, -1, EMP_IFACE_CHANNEL_TYPE_FILE, "SocketPath", &socket_path, NULL, NULL); if (priv->unix_socket_path) g_free (priv->unix_socket_path); priv->unix_socket_path = g_value_dup_string (socket_path); g_value_unset (socket_path); if (G_STR_EMPTY (priv->unix_socket_path)) return -1; DEBUG ("socket path is %s", priv->unix_socket_path); fd = socket (PF_UNIX, SOCK_STREAM, 0); if (fd < 0) return -1; memset (&addr, 0, sizeof (addr)); addr.sun_family = AF_UNIX; path_len = strlen (priv->unix_socket_path); strncpy (addr.sun_path, priv->unix_socket_path, path_len); if (connect (fd, (struct sockaddr*) &addr, sizeof (addr)) < 0) { close (fd); return -1; } return fd; } static void send_file (EmpathyFile *file) { gint socket_fd; GOutputStream *socket_stream; EmpathyFilePriv *priv; priv = GET_PRIV (file); DEBUG ("Sending file content: filename=%s", priv->filename); g_return_if_fail (priv->in_stream); socket_fd = _get_local_socket (file); if (socket_fd < 0) { DEBUG ("failed to get local socket fd"); return; } DEBUG ("got local socket fd"); socket_stream = g_unix_output_stream_new (socket_fd, TRUE); priv->cancellable = g_cancellable_new (); copy_stream (priv->in_stream, socket_stream, priv->cancellable); g_object_unref (socket_stream); } static void file_state_changed_cb (DBusGProxy *file_iface, EmpFileTransferState state, EmpFileTransferStateChangeReason reason, EmpathyFile *file) { EmpathyFilePriv *priv; priv = GET_PRIV (file); DEBUG ("File transfer state changed: filename=%s, " "old state=%u, state=%u, reason=%u", priv->filename, priv->state, state, reason); if (state == EMP_FILE_TRANSFER_STATE_OPEN) priv->start_time = get_time_msec (); DEBUG ("state = %u, direction = %u, in_stream = %s", state, priv->direction, priv->in_stream ? "present" : "not present"); if (state == EMP_FILE_TRANSFER_STATE_OPEN && priv->direction == EMP_FILE_TRANSFER_DIRECTION_OUTGOING && priv->in_stream) send_file (file); priv->state = state; priv->state_change_reason = reason; g_object_notify (G_OBJECT (file), "state"); } static void file_transferred_bytes_changed_cb (DBusGProxy *file_iface, guint64 transferred_bytes, EmpathyFile *file) { EmpathyFilePriv *priv; priv = GET_PRIV (file); if (priv->transferred_bytes == transferred_bytes) return; priv->transferred_bytes = transferred_bytes; g_object_notify (G_OBJECT (file), "transferred-bytes"); } EmpathyContact * empathy_file_get_contact (EmpathyFile *file) { EmpathyFilePriv *priv; priv = GET_PRIV (file); return priv->contact; } GInputStream * empathy_file_get_input_stream (EmpathyFile *file) { EmpathyFilePriv *priv; priv = GET_PRIV (file); return priv->in_stream; } GOutputStream * empathy_file_get_output_stream (EmpathyFile *file) { EmpathyFilePriv *priv; priv = GET_PRIV (file); return priv->out_stream; } const gchar * empathy_file_get_filename (EmpathyFile *file) { EmpathyFilePriv *priv; priv = GET_PRIV (file); return priv->filename; } EmpFileTransferDirection empathy_file_get_direction (EmpathyFile *file) { EmpathyFilePriv *priv; priv = GET_PRIV (file); return priv->direction; } EmpFileTransferState empathy_file_get_state (EmpathyFile *file) { EmpathyFilePriv *priv; priv = GET_PRIV (file); return priv->state; } EmpFileTransferStateChangeReason empathy_file_get_state_change_reason (EmpathyFile *file) { EmpathyFilePriv *priv; priv = GET_PRIV (file); g_return_val_if_fail (priv->state_change_reason >= 0, EMP_FILE_TRANSFER_STATE_CHANGE_REASON_NONE); return priv->state_change_reason; } guint64 empathy_file_get_size (EmpathyFile *file) { EmpathyFilePriv *priv; priv = GET_PRIV (file); return priv->size; } guint64 empathy_file_get_transferred_bytes (EmpathyFile *file) { EmpathyFilePriv *priv; priv = GET_PRIV (file); return priv->transferred_bytes; } gint empathy_file_get_remaining_time (EmpathyFile *file) { EmpathyFilePriv *priv; gint64 curr_time, elapsed_time; gdouble time_per_byte; gdouble remaining_time; priv = GET_PRIV (file); if (priv->size == EMPATHY_FILE_UNKNOWN_SIZE) return -1; if (priv->transferred_bytes == priv->size) return 0; curr_time = get_time_msec (); elapsed_time = curr_time - priv->start_time; time_per_byte = (gdouble) elapsed_time / (gdouble) priv->transferred_bytes; remaining_time = (time_per_byte * (priv->size - priv->transferred_bytes)) / 1000; return (gint) (remaining_time + 0.5); } void empathy_file_set_input_stream (EmpathyFile *file, GInputStream *in_stream) { EmpathyFilePriv *priv; priv = GET_PRIV (file); if (priv->in_stream == in_stream) return; if (priv->direction == EMP_FILE_TRANSFER_DIRECTION_INCOMING) g_warning ("Setting an input stream for incoming file " "transfers is useless"); if (priv->in_stream) g_object_unref (priv->in_stream); if (in_stream) g_object_ref (in_stream); priv->in_stream = in_stream; g_object_notify (G_OBJECT (file), "in-stream"); } void empathy_file_set_output_stream (EmpathyFile *file, GOutputStream *out_stream) { EmpathyFilePriv *priv; priv = GET_PRIV (file); if (priv->out_stream == out_stream) return; if (priv->direction == EMP_FILE_TRANSFER_DIRECTION_OUTGOING) g_warning ("Setting an output stream for outgoing file " "transfers is useless"); if (priv->out_stream) g_object_unref (priv->out_stream); if (out_stream) g_object_ref (out_stream); priv->out_stream = out_stream; } void empathy_file_set_filename (EmpathyFile *file, const gchar *filename) { EmpathyFilePriv *priv; priv = GET_PRIV (file); g_return_if_fail (filename != NULL); if (priv->filename && strcmp (filename, priv->filename) == 0) { return; } g_free (priv->filename); priv->filename = g_strdup (filename); g_object_notify (G_OBJECT (file), "filename"); } /* Functions to copy the content of a GInputStream to a GOutputStream */ #define N_BUFFERS 2 #define BUFFER_SIZE 4096 typedef struct { GInputStream *in; GOutputStream *out; GCancellable *cancellable; char *buff[N_BUFFERS]; /* the temporary buffers */ gsize count[N_BUFFERS]; /* how many bytes are used in the buffers */ gboolean is_full[N_BUFFERS]; /* whether the buffers contain data */ gint curr_read; /* index of the buffer used for reading */ gint curr_write; /* index of the buffer used for writing */ gboolean is_reading; /* we are reading */ gboolean is_writing; /* we are writing */ guint n_closed; /* number of streams that have been closed */ } CopyData; static void schedule_next (CopyData *copy); static void free_copy_data_if_closed (CopyData *copy) { gint i; /* Free the data only if both the input and output streams have * been closed. */ copy->n_closed++; if (copy->n_closed < 2) return; if (copy->in != NULL) g_object_unref (copy->in); if (copy->out != NULL) g_object_unref (copy->out); for (i = 0; i < N_BUFFERS; i++) g_free (copy->buff[i]); g_object_unref (copy->cancellable); g_free (copy); } static void io_error (CopyData *copy, GError *error) { g_cancellable_cancel (copy->cancellable); if (error == NULL) g_warning ("I/O error"); else if (error->domain == G_IO_ERROR && error->code == G_IO_ERROR_CANCELLED) ; /* Ignore cancellations */ else g_warning ("I/O error: %d: %s\n", error->code, error->message); if (copy->in != NULL) g_input_stream_close (copy->in, NULL, NULL); if (copy->out != NULL) g_output_stream_close (copy->out, NULL, NULL); free_copy_data_if_closed (copy); } static void close_done (GObject *source_object, GAsyncResult *res, gpointer user_data) { CopyData *copy = user_data; g_object_unref (source_object); free_copy_data_if_closed (copy); } static void write_done_cb (GObject *source_object, GAsyncResult *res, gpointer user_data) { CopyData *copy = user_data; gssize count_write; GError *error = NULL; count_write = g_output_stream_write_finish (copy->out, res, &error); if (count_write <= 0) { io_error (copy, error); g_error_free (error); return; } copy->is_full[copy->curr_write] = FALSE; copy->curr_write = (copy->curr_write + 1) % N_BUFFERS; copy->is_writing = FALSE; schedule_next (copy); } static void read_done_cb (GObject *source_object, GAsyncResult *res, gpointer user_data) { CopyData *copy = user_data; gssize count_read; GError *error = NULL; count_read = g_input_stream_read_finish (copy->in, res, &error); if (count_read == 0) { g_input_stream_close_async (copy->in, 0, copy->cancellable, close_done, copy); copy->in = NULL; } else if (count_read < 0) { io_error (copy, error); g_error_free (error); return; } copy->count[copy->curr_read] = count_read; copy->is_full[copy->curr_read] = TRUE; copy->curr_read = (copy->curr_read + 1) % N_BUFFERS; copy->is_reading = FALSE; schedule_next (copy); } static void schedule_next (CopyData *copy) { if (copy->in != NULL && !copy->is_reading && !copy->is_full[copy->curr_read]) { /* We are not reading and the current buffer is empty, so * start an async read. */ copy->is_reading = TRUE; g_input_stream_read_async (copy->in, copy->buff[copy->curr_read], BUFFER_SIZE, 0, copy->cancellable, read_done_cb, copy); } if (!copy->is_writing && copy->is_full[copy->curr_write]) { if (copy->count[copy->curr_write] == 0) { /* The last read on the buffer read 0 bytes, this * means that we got an EOF, so we can close * the output channel. */ g_output_stream_close_async (copy->out, 0, copy->cancellable, close_done, copy); copy->out = NULL; } else { /* We are not writing and the current buffer contains * data, so start an async write. */ copy->is_writing = TRUE; g_output_stream_write_async (copy->out, copy->buff[copy->curr_write], copy->count[copy->curr_write], 0, copy->cancellable, write_done_cb, copy); } } } static void copy_stream (GInputStream *in, GOutputStream *out, GCancellable *cancellable) { CopyData *copy; gint i; g_return_if_fail (in != NULL); g_return_if_fail (out != NULL); copy = g_new0 (CopyData, 1); copy->in = g_object_ref (in); copy->out = g_object_ref (out); if (cancellable != NULL) copy->cancellable = g_object_ref (cancellable); else copy->cancellable = g_cancellable_new (); for (i = 0; i < N_BUFFERS; i++) copy->buff[i] = g_malloc (BUFFER_SIZE); schedule_next (copy); }