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Check for "our" threads in some places

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Don't allow g_thread_join() to be called on or g_thread_exit() to be
called from within threads that were not created by GLib.  Document
this.
This commit is contained in:
Ryan Lortie 2011-10-15 09:48:42 -04:00
parent 11f3684b71
commit 3fe3fdd75a
1 changed files with 17 additions and 3 deletions
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20
glib/gthread.c
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@ -849,14 +849,21 @@ g_thread_new_internal (const gchar *name,
* Calling <literal>g_thread_exit (retval)</literal> is equivalent to
* returning @retval from the function @func, as given to g_thread_new().
*
* <note><para>Never call g_thread_exit() from within a thread of a
* #GThreadPool, as that will mess up the bookkeeping and lead to funny
* and unwanted results.</para></note>
* <note><para>
* You must only call g_thread_exit() from a thread that you created
* yourself with g_thread_new() or related APIs. You must not call
* this function from a thread created with another threading library
* or or from within a #GThreadPool.
* </para></note>
*/
void
g_thread_exit (gpointer retval)
{
GRealThread* real = (GRealThread*) g_thread_self ();
if G_UNLIKELY (!real->ours)
g_error ("attempt to g_thread_exit() a thread not created by GLib");
real->retval = retval;
g_system_thread_exit ();
@ -890,6 +897,7 @@ g_thread_join (GThread *thread)
gpointer retval;
g_return_val_if_fail (thread, NULL);
g_return_val_if_fail (real->ours, NULL);
g_system_thread_wait (real);
@ -910,6 +918,12 @@ g_thread_join (GThread *thread)
* current thread. Note that this function does not increase
* the reference count of the returned object.
*
* This function will return a #GThread even for threads that were not
* created by GLib (ie: those created by other threading APIs). This
* may be useful for thread identification purposes (ie: comparisons)
* but you must not use GLib functions (such as g_thread_join()) on
* these threads.
*
* Returns: the #GThread representing the current thread
*/
GThread*