David Zeuthen 8a3a4596e2 Bug 626748 – Use async methods for writing and handle EAGAIN ... If sending a lot of data and/or the other peer is not reading it, then socket buffers can overflow. This is communicated from the kernel by returning EAGAIN. In GIO, it is modelled by g_output_stream_write() and g_socket_send_message() returning G_IO_ERROR_WOULD_BLOCK. It is also problematic that that we're using synchronous IO in the shared GDBus IO thread. It means that one GDBusConnection can lock up others. It turns out that by porting from g_output_stream_write() to g_output_stream_write_async() we fix the EAGAIN issue. For GSocket, we still need to handle things manually (by creating a GSource) as g_socket_send_message() is used. We check the new behavior in Michael's producer/consumer test case (at /gdbus/overflow in gdbus-peer.c) added in the last commit. Also add a test case that sends and receives a 20 MiB message. Also add a new `transport' G_DBUS_DEBUG option so it is easy to inspect partial writes: $ G_DBUS_DEBUG=transport ./gdbus-connection -p /gdbus/connection/large_message [...] ======================================================================== GDBus-debug:Transport: >>>> WROTE 128000 bytes of message with serial 4 and size 20971669 from offset 0 on a GSocketOutputStream ======================================================================== GDBus-debug:Transport: >>>> WROTE 128000 bytes of message with serial 4 and size 20971669 from offset 128000 on a GSocketOutputStream ======================================================================== GDBus-debug:Transport: >>>> WROTE 128000 bytes of message with serial 4 and size 20971669 from offset 256000 on a GSocketOutputStream [...] ======================================================================== GDBus-debug:Transport: >>>> WROTE 43669 bytes of message with serial 4 and size 20971669 from offset 20928000 on a GSocketOutputStream [...] ======================================================================== GDBus-debug:Transport: <<<< READ 16 bytes of message with serial 3 and size 20971620 to offset 0 from a GSocketInputStream ======================================================================== GDBus-debug:Transport: <<<< READ 15984 bytes of message with serial 3 and size 20971620 to offset 16 from a GSocketInputStream ======================================================================== GDBus-debug:Transport: <<<< READ 16000 bytes of message with serial 3 and size 20971620 to offset 16000 from a GSocketInputStream [...] ======================================================================== GDBus-debug:Transport: <<<< READ 144000 bytes of message with serial 3 and size 20971620 to offset 20720000 from a GSocketInputStream ======================================================================== GDBus-debug:Transport: <<<< READ 107620 bytes of message with serial 3 and size 20971620 to offset 20864000 from a GSocketInputStream OK https://bugzilla.gnome.org/show_bug.cgi?id=626748 Signed-off-by: David Zeuthen <davidz@redhat.com>		2010-08-16 13:54:13 -04:00
..
.gitignore	.gitignore updates for gsettings stuff	2010-04-27 17:04:57 -04:00
gdbus.xml	Add --xml to gdbus-tool to print raw introspected XML	2010-06-14 00:02:57 +02:00
gio-docs.xml	Bug 617483 – Credentials passing	2010-07-20 16:34:18 -04:00
gio-querymodules.xml	Add a man page for gio-querymodules	2010-04-18 15:54:54 -04:00
gio-sections.txt	Always do async vs sync correctly in GSocketConnection streams	2010-08-15 15:34:29 -04:00
gio.types	Merge the wip/gapplication branch	2010-06-07 13:48:42 -04:00
glib-compile-schemas.xml	Document vendor override files	2010-08-13 21:23:22 -04:00
gsettings.xml	Rename gsettings-tool to gsettings	2010-04-22 01:17:02 -04:00
gvfs-overview.odg	update the overview image of the gio docs	2009-06-08 17:29:22 +02:00
gvfs-overview.png	update the overview image of the gio docs	2009-06-08 17:29:22 +02:00
Makefile.am	Replace -I with $(glib_INCLUDES) and friends	2010-08-06 13:10:34 -04:00
migrating-gconf.xml	Remove gsettings-schema-convert tool	2010-06-21 13:24:40 -04:00
migrating-gdbus.xml	Bug 621213 – GDBusProxy and well-known names	2010-06-11 18:21:27 -04:00
migrating-gnome-vfs.xml	Add a migration chapter for dbus bits	2010-05-06 17:58:29 -04:00
migrating-posix.xml	Remove duplicate copies of migration docs	2010-05-27 13:07:54 -04:00
overview.xml	Bug 626748 – Use async methods for writing and handle EAGAIN	2010-08-16 13:54:13 -04:00
version.xml.in	gio/ docs/reference/gio Merged gio-standalone into glib.	2007-11-26 16:13:05 +00:00