[Bug 599546] [0.10/1.0] Faster read/write macros

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=599546
  GStreamer | gstreamer (core) | git

Edward Hervey <bilboed> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO

--- Comment #27 from Edward Hervey <bilboed at gmail.com> 2012-06-08 07:54:43 UTC ---
The remaining problem is the following (with the unit test I pushed yesterday,
which is representative of how GST_READ_* is being used):

gst/gstutils.c: In function ‘test_read_macros’:
gst/gstutils.c:1100:3: warning: dereferencing type-punned pointer will break
strict-aliasing rules [-Wstrict-aliasing]
gst/gstutils.c:1100:3: warning: dereferencing type-punned pointer will break
strict-aliasing rules [-Wstrict-aliasing]
gst/gstutils.c:1108:3: warning: dereferencing type-punned pointer will break
strict-aliasing rules [-Wstrict-aliasing]
gst/gstutils.c:1117:3: warning: dereferencing type-punned pointer will break
strict-aliasing rules [-Wstrict-aliasing]
gst/gstutils.c:1117:3: warning: dereferencing type-punned pointer will break
strict-aliasing rules [-Wstrict-aliasing]
gst/gstutils.c:1120:3: warning: dereferencing type-punned pointer will break
strict-aliasing rules [-Wstrict-aliasing]
gst/gstutils.c:1178:3: warning: dereferencing type-punned pointer will break
strict-aliasing rules [-Wstrict-aliasing]
gst/gstutils.c:1184:3: warning: dereferencing type-punned pointer will break
strict-aliasing rules [-Wstrict-aliasing]
gst/gstutils.c:1204:3: warning: dereferencing type-punned pointer will break
strict-aliasing rules [-Wstrict-aliasing]
gst/gstutils.c:1206:3: warning: dereferencing type-punned pointer will break
strict-aliasing rules [-Wstrict-aliasing]
gst/gstutils.c:1209:3: warning: dereferencing type-punned pointer will break
strict-aliasing rules [-Wstrict-aliasing]
gst/gstutils.c:1211:3: warning: dereferencing type-punned pointer will break
strict-aliasing rules [-Wstrict-aliasing]

It never fails with a guint8* (or gpointer)... but with a guint<whatever>[] ...
it'll complain.

The check passes fine fwiw, the question is just : what do we do ?
* We don't switch to using those macros (grmbl)
* We fix the few plugins that use GST_READ on arrays to being pointers instead

there are only a few culprits (one in good, two in bad)

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