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a8fb1cf162
* gtk/gtkdnd.c, gtk/gtkclipboard.c, gdk/x11/gdkmain-x11.c: Documentation updates.
* gtk/tmpl/gtkdnd.sgml, gtk/tmpl/gtkclipboard.sgml,
gdk/tmpl/general.sgml, gdk/tmpl/threads.sgml,
gdk/tmpl/x_interaction.sgml: Updates.
78 lines
1.9 KiB
Plaintext
78 lines
1.9 KiB
Plaintext
<!-- ##### SECTION Title ##### -->
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Threads
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<!-- ##### SECTION Short_Description ##### -->
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functions for using GDK in multi-threaded programs
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<!-- ##### SECTION Long_Description ##### -->
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<para>
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For thread safety, GDK relies on the thread primitives in GLib,
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and on the thread-safe GLib main loop.
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</para>
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<para>
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You must call g_thread_init() before executing any other GTK+ or GDK
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functions in a threaded GTK+ program.
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</para>
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<para>
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Idles, timeouts, and input functions are executed outside
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of the main GTK+ lock. So, if you need to call GTK+
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inside of such a callback, you must surround the callback
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with a gdk_threads_enter()/gdk_threads_leave() pair.
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(However, signals are still executed within the main
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GTK+ lock.)
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</para>
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<para>
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In particular, this means, if you are writing widgets that might
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be used in threaded programs, you <emphasis>must</emphasis> surround
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timeouts and idle functions in this matter.
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</para>
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<para>
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As always, you must also surround any calls to GTK+ not made within
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a signal handler with a gdk_threads_enter()/gdk_threads_leave() pair.
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</para>
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<!-- ##### SECTION See_Also ##### -->
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<para>
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</para>
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<!-- ##### MACRO GDK_THREADS_ENTER ##### -->
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<para>
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This macro marks the begin of a critical section
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in which GDK and GTK+ functions can be called.
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Only one thread at a time can be in such a critial
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section.
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</para>
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<!-- ##### MACRO GDK_THREADS_LEAVE ##### -->
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<para>
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This macro marks the end of a critical section
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begun with #GDK_THREADS_ENTER.
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</para>
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<!-- ##### FUNCTION gdk_threads_enter ##### -->
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<para>
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Enters a critical region like #GDK_THREADS_ENTER.
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</para>
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<!-- ##### FUNCTION gdk_threads_leave ##### -->
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<para>
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Leaves a critical region begun with gdk_threads_enter().
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</para>
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<!-- ##### VARIABLE gdk_threads_mutex ##### -->
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<para>
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The #GMutex used to implement the critical region for
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gdk_threads_enter()/gdk_threads_leave().
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</para>
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