diff options
Diffstat (limited to 'src/mm-port-serial.c')
| -rw-r--r-- | src/mm-port-serial.c | 137 |
1 files changed, 87 insertions, 50 deletions
diff --git a/src/mm-port-serial.c b/src/mm-port-serial.c index fc5d59e6..684b0ac2 100644 --- a/src/mm-port-serial.c +++ b/src/mm-port-serial.c @@ -698,8 +698,6 @@ port_serial_got_response (MMPortSerial *self, GByteArray *parsed_response, const GError *error) { - CommandContext *ctx; - /* Either one or the other, not both */ g_assert ((parsed_response && !error) || (!parsed_response && error)); @@ -717,26 +715,36 @@ port_serial_got_response (MMPortSerial *self, g_clear_object (&self->priv->cancellable); - ctx = (CommandContext *) g_queue_pop_head (self->priv->queue); - if (ctx) { - /* Complete the command context with the appropriate result */ - if (error) - g_simple_async_result_set_from_error (ctx->result, error); - else { - if (ctx->allow_cached) - port_serial_set_cached_reply (self, ctx->command, parsed_response); - g_simple_async_result_set_op_res_gpointer (ctx->result, - g_byte_array_ref (parsed_response), - (GDestroyNotify) g_byte_array_unref); + /* The completion of the command context may end up fully disposing the + * serial port object. In order to cope with that, we make sure we have + * our own reference to the object while the completion and follow up + * setup runs. */ + g_object_ref (self); + { + CommandContext *ctx; + + ctx = (CommandContext *) g_queue_pop_head (self->priv->queue); + if (ctx) { + /* Complete the command context with the appropriate result */ + if (error) + g_simple_async_result_set_from_error (ctx->result, error); + else { + if (ctx->allow_cached) + port_serial_set_cached_reply (self, ctx->command, parsed_response); + g_simple_async_result_set_op_res_gpointer (ctx->result, + g_byte_array_ref (parsed_response), + (GDestroyNotify) g_byte_array_unref); + } + + /* Don't complete in idle. We need the caller remove the response range which + * was processed, and that must be done before processing any new queued command */ + command_context_complete_and_free (ctx, FALSE); } - /* Don't complete in idle. We need the caller remove the response range which - * was processed, and that must be done before processing any new queued command */ - command_context_complete_and_free (ctx, FALSE); + if (!g_queue_is_empty (self->priv->queue)) + port_serial_schedule_queue_process (self, 0); } - - if (!g_queue_is_empty (self->priv->queue)) - port_serial_schedule_queue_process (self, 0); + g_object_unref (self); } static gboolean @@ -756,12 +764,19 @@ port_serial_timed_out (gpointer data) error = g_error_new_literal (MM_SERIAL_ERROR, MM_SERIAL_ERROR_RESPONSE_TIMEOUT, "Serial command timed out"); - port_serial_got_response (self, NULL, error); - g_error_free (error); - /* Emit a timed out signal, used by upper layers to identify a disconnected - * serial port */ - g_signal_emit (self, signals[TIMED_OUT], 0, self->priv->n_consecutive_timeouts); + /* Make sure we have a valid reference when emitting the signal */ + g_object_ref (self); + { + port_serial_got_response (self, NULL, error); + + /* Emit a timed out signal, used by upper layers to identify a disconnected + * serial port */ + g_signal_emit (self, signals[TIMED_OUT], 0, self->priv->n_consecutive_timeouts); + } + g_object_unref (self); + + g_error_free (error); return G_SOURCE_REMOVE; } @@ -781,6 +796,7 @@ port_serial_response_wait_cancelled (GCancellable *cancellable, error = g_error_new_literal (MM_CORE_ERROR, MM_CORE_ERROR_CANCELLED, "Waiting for the reply cancelled"); + /* Note: may complete last operation and unref the MMPortSerial */ port_serial_got_response (self, NULL, error); g_error_free (error); } @@ -807,6 +823,7 @@ port_serial_queue_process (gpointer data) parsed_response = g_byte_array_sized_new (cached->len); g_byte_array_append (parsed_response, cached->data, cached->len); + /* Note: may complete last operation and unref the MMPortSerial */ port_serial_got_response (self, parsed_response, NULL); g_byte_array_unref (parsed_response); return G_SOURCE_REMOVE; @@ -817,6 +834,7 @@ port_serial_queue_process (gpointer data) /* If error, report it */ if (!port_serial_process_command (self, ctx, &error)) { + /* Note: may complete last operation and unref the MMPortSerial */ port_serial_got_response (self, NULL, error); g_error_free (error); return G_SOURCE_REMOVE; @@ -843,6 +861,7 @@ port_serial_queue_process (gpointer data) error = g_error_new (MM_CORE_ERROR, MM_CORE_ERROR_CANCELLED, "Won't wait for the reply"); + /* Note: may complete last operation and unref the MMPortSerial */ port_serial_got_response (self, NULL, error); g_error_free (error); return G_SOURCE_REMOVE; @@ -886,6 +905,7 @@ parse_response_buffer (MMPortSerial *self) /* We have a valid response to process */ g_assert (parsed_response); self->priv->n_consecutive_timeouts = 0; + /* Note: may complete last operation and unref the MMPortSerial */ port_serial_got_response (self, parsed_response, NULL); g_byte_array_unref (parsed_response); break; @@ -893,6 +913,7 @@ parse_response_buffer (MMPortSerial *self) /* We have an error to process */ g_assert (error); self->priv->n_consecutive_timeouts = 0; + /* Note: may complete last operation and unref the MMPortSerial */ port_serial_got_response (self, NULL, error); g_error_free (error); break; @@ -912,6 +933,8 @@ common_input_available (MMPortSerial *self, CommandContext *ctx; const char *device; GError *error = NULL; + gboolean iterate = TRUE; + gboolean keep_source = G_SOURCE_CONTINUE; if (condition & G_IO_HUP) { device = mm_port_get_device (MM_PORT (self)); @@ -920,21 +943,21 @@ common_input_available (MMPortSerial *self, if (self->priv->response->len) g_byte_array_remove_range (self->priv->response, 0, self->priv->response->len); port_serial_close_force (self); - return FALSE; + return G_SOURCE_REMOVE; } if (condition & G_IO_ERR) { if (self->priv->response->len) g_byte_array_remove_range (self->priv->response, 0, self->priv->response->len); - return TRUE; + return G_SOURCE_CONTINUE; } /* Don't read any input if the current command isn't done being sent yet */ ctx = g_queue_peek_nth (self->priv->queue, 0); if (ctx && (ctx->started == TRUE) && (ctx->done == FALSE)) - return TRUE; + return G_SOURCE_CONTINUE; - do { + while (iterate) { bytes_read = 0; if (self->priv->iochannel) { @@ -986,13 +1009,30 @@ common_input_available (MMPortSerial *self, g_byte_array_remove_range (self->priv->response, 0, (SERIAL_BUF_SIZE / 2)); } - /* See if we can parse anything */ - parse_response_buffer (self); - - } while ( (bytes_read == SERIAL_BUF_SIZE || status == G_IO_STATUS_AGAIN) - && (self->priv->iochannel_id > 0 || self->priv->socket_source != NULL)); + /* See if we can parse anything. The response parsing may actually + * schedule the completion of a serial command, and that in turn may end + * up fully disposing this serial port object. In order to cope with + * that we make sure we have our own reference to the object while the + * response buffer operation is run, and then we check ourselves whether + * we should be keeping this socket/iochannel source or not. */ + g_object_ref (self); + { + parse_response_buffer (self); + + /* If we didn't end up closing the iochannel/socket in the previous + * operation, we keep this source. */ + keep_source = ((self->priv->iochannel_id > 0 || self->priv->socket_source != NULL) ? + G_SOURCE_CONTINUE : G_SOURCE_REMOVE); + + /* If we're keeping the source and we still may have bytes to read, + * iterate. */ + iterate = ((keep_source == G_SOURCE_CONTINUE) && + (bytes_read == SERIAL_BUF_SIZE || status == G_IO_STATUS_AGAIN)); + } + g_object_unref (self); + } - return TRUE; + return keep_source; } static gboolean @@ -1017,7 +1057,6 @@ data_watch_enable (MMPortSerial *self, gboolean enable) if (self->priv->iochannel_id) { if (enable) g_warn_if_fail (self->priv->iochannel_id == 0); - g_source_remove (self->priv->iochannel_id); self->priv->iochannel_id = 0; } @@ -1977,25 +2016,24 @@ get_property (GObject *object, } static void -dispose (GObject *object) +finalize (GObject *object) { MMPortSerial *self = MM_PORT_SERIAL (object); - if (self->priv->timeout_id) { - g_source_remove (self->priv->timeout_id); - self->priv->timeout_id = 0; - } - - port_serial_close_force (MM_PORT_SERIAL (object)); + port_serial_close_force (MM_PORT_SERIAL (object)); mm_port_serial_flash_cancel (MM_PORT_SERIAL (object)); - G_OBJECT_CLASS (mm_port_serial_parent_class)->dispose (object); -} + /* These are disposed during port closing */ + g_assert (self->priv->iochannel == NULL); + g_assert (self->priv->iochannel_id == 0); + g_assert (self->priv->socket == NULL); + g_assert (self->priv->socket_source == NULL); -static void -finalize (GObject *object) -{ - MMPortSerial *self = MM_PORT_SERIAL (object); + if (self->priv->timeout_id) + g_source_remove (self->priv->timeout_id); + + if (self->priv->queue_id) + g_source_remove (self->priv->queue_id); g_hash_table_destroy (self->priv->reply_cache); g_byte_array_unref (self->priv->response); @@ -2014,8 +2052,7 @@ mm_port_serial_class_init (MMPortSerialClass *klass) /* Virtual methods */ object_class->set_property = set_property; object_class->get_property = get_property; - object_class->dispose = dispose; - object_class->finalize = finalize; + object_class->finalize = finalize; klass->config_fd = real_config_fd; |