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Enable threads in g_type_init()

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This means threads will be supported for all gobject libraries/applications
and initialized early enough to not cause any problems.

This solves the problem of libraries needing threadsafety. Previosly
they just called g_threads_init() anyway, which often works but sometimes
breaks in unexpected ways.

See this thread for more details:
http://mail.gnome.org/archives/gtk-devel-list/2009-November/msg00208.html

https://bugzilla.gnome.org/show_bug.cgi?id=606775
This commit is contained in:
Alexander Larsson 2010-01-12 21:22:45 +01:00
parent 0df3ca8f9b
commit fa2bced1f3
5 changed files with 19 additions and 4 deletions
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8
docs/reference/glib/tmpl/threads.sgml
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@ -48,6 +48,14 @@ However, many libraries above glib does not support late initialization of
threads, so doing this should be avoided if possible.
</para>
<para>
Please note that since version 2.24 the GObject initialization
function g_type_init() initializes threads (with a %NULL argument), so
most applications, including those using Gtk+ will run with threads
enabled. If you want a special thread implementation, make sure you
call g_thread_init() before g_type_init() is called.
</para>
<para>
After calling g_thread_init(), GLib is completely
thread safe (all global data is automatically locked), but individual

2
gobject-2.0-uninstalled.pc.in
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@ -1,6 +1,6 @@
Name: GObject Uninstalled
Description: Object/type system for GLib, Not Installed
Requires: glib-2.0-uninstalled
Requires: glib-2.0-uninstalled,gthread-2.0-uninstalled
Version: @VERSION@
Libs: ${pc_top_builddir}/${pcfiledir}/gobject/libgobject-2.0.la
## cflags contains builddir in addition to srcdir because of gmarshal.h

2
gobject-2.0.pc.in
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@ -5,7 +5,7 @@ includedir=@includedir@
Name: GObject
Description: GLib Type, Object, Parameter and Signal Library
Requires: glib-2.0
Requires: glib-2.0,gthread-2.0
Version: @VERSION@
Libs: -L${libdir} -lgobject-2.0
Cflags:

2
gobject/Makefile.am
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@ -31,7 +31,7 @@ TESTS = abicheck.sh pltcheck.sh
endif
endif
libglib = $(top_builddir)/glib/libglib-2.0.la
libglib = $(top_builddir)/glib/libglib-2.0.la $(top_builddir)/gthread/libgthread-2.0.la
# libraries to compile and install
lib_LTLIBRARIES = libgobject-2.0.la

9
gobject/gtype.c
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@ -4180,7 +4180,12 @@ g_type_init_with_debug_flags (GTypeDebugFlags debug_flags)
GTypeInfo info;
TypeNode *node;
volatile GType votype;
#ifdef G_THREADS_ENABLED
if (!g_thread_get_initialized())
g_thread_init (NULL);
#endif
G_LOCK (type_init_lock);
G_WRITE_LOCK (&type_rw_lock);
@ -4284,6 +4289,8 @@ g_type_init_with_debug_flags (GTypeDebugFlags debug_flags)
* to initialize the type system and assorted other code portions
* (such as the various fundamental type implementations or the signal
* system).
*
* Since version 2.24 this also initializes the thread system
*/
void
g_type_init (void)