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Exited threads retain less memory

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* libguile/threads.c (on_thread_exit): Lessen excess retention.
This commit is contained in:
Andy Wingo 2017-01-08 13:44:38 +01:00
parent 12eb7b8256
commit dffe495d0d
1 changed files with 17 additions and 6 deletions
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23
libguile/threads.c
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@ -475,7 +475,9 @@ guilify_self_2 (SCM dynamic_state)
static void
on_thread_exit (void *v)
{
/* This handler is executed in non-guile mode. */
/* This handler is executed in non-guile mode. Note that although
libgc isn't guaranteed to see thread-locals, for this thread-local
that isn't an issue as we have the all_threads list. */
scm_i_thread *t = (scm_i_thread *) v, **tp;
t->exited = 1;
@ -506,11 +508,20 @@ on_thread_exit (void *v)
scm_i_pthread_mutex_unlock (&thread_admin_mutex);
if (t->vp)
{
scm_i_vm_free_stack (t->vp);
t->vp = NULL;
}
/* Although this thread has exited, the thread object might still be
alive. Release unused memory. */
t->freelists = NULL;
t->pointerless_freelists = NULL;
t->dynamic_state = NULL;
t->dynstack.base = NULL;
t->dynstack.top = NULL;
t->dynstack.limit = NULL;
{
struct scm_vm *vp = t->vp;
t->vp = NULL;
if (vp)
scm_i_vm_free_stack (vp);
}
#if SCM_USE_PTHREAD_THREADS
GC_unregister_my_thread ();