-/* Copyright (C) 1995,1996,1998,2000,2001,2004 Free Software Foundation, Inc.
+/* Copyright (C) 1995,1996,1998,2000,2001,2004, 2006, 2008 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
\f
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
#include "libguile/_scm.h"
scm_t_bits scm_tc16_continuation;
-static SCM
-continuation_mark (SCM obj)
-{
- scm_t_contregs *continuation = SCM_CONTREGS (obj);
-
- scm_gc_mark (continuation->root);
- scm_gc_mark (continuation->throw_value);
- scm_mark_locations (continuation->stack, continuation->num_stack_items);
-#ifdef __ia64__
- if (continuation->backing_store)
- scm_mark_locations (continuation->backing_store,
- continuation->backing_store_size /
- sizeof (SCM_STACKITEM));
-#endif /* __ia64__ */
- return continuation->dynenv;
-}
-
-static size_t
-continuation_free (SCM obj)
-{
- scm_t_contregs *continuation = SCM_CONTREGS (obj);
- /* stack array size is 1 if num_stack_items is 0. */
- size_t extra_items = (continuation->num_stack_items > 0)
- ? (continuation->num_stack_items - 1)
- : 0;
- size_t bytes_free = sizeof (scm_t_contregs)
- + extra_items * sizeof (SCM_STACKITEM);
-
-#ifdef __ia64__
- scm_gc_free (continuation->backing_store, continuation->backing_store_size,
- "continuation backing store");
-#endif /* __ia64__ */
- scm_gc_free (continuation, bytes_free, "continuation");
- return 0;
-}
static int
continuation_print (SCM obj, SCM port, scm_print_state *state SCM_UNUSED)
return 1;
}
-#ifdef __ia64__
-/* Extern declaration of getcontext()/setcontext() in order to redefine
- getcontext() since on ia64-linux the second return value indicates whether
- it returned from getcontext() itself or by running setcontext(). */
-struct rv
-{
- long retval;
- long first_return;
-};
-extern struct rv ia64_getcontext (ucontext_t *) __asm__ ("getcontext");
-#endif /* __ia64__ */
-
/* this may return more than once: the first time with the escape
procedure, then subsequently with the value to be passed to the
continuation. */
scm_t_contregs *continuation;
long stack_size;
SCM_STACKITEM * src;
-#ifdef __ia64__
- struct rv rv;
-#endif /* __ia64__ */
SCM_FLUSH_REGISTER_WINDOWS;
stack_size = scm_stack_size (thread->continuation_base);
continuation->offset = continuation->stack - src;
memcpy (continuation->stack, src, sizeof (SCM_STACKITEM) * stack_size);
-#ifdef __ia64__
- rv = ia64_getcontext (&continuation->ctx);
- if (rv.first_return)
+ *first = !setjmp (continuation->jmpbuf);
+ if (*first)
{
- continuation->backing_store_size =
- continuation->ctx.uc_mcontext.sc_ar_bsp -
- (unsigned long) __libc_ia64_register_backing_store_base;
+#ifdef __ia64__
+ continuation->backing_store_size =
+ (char *) scm_ia64_ar_bsp(&continuation->jmpbuf.ctx)
+ -
+ (char *) thread->register_backing_store_base;
continuation->backing_store = NULL;
continuation->backing_store =
scm_gc_malloc (continuation->backing_store_size,
"continuation backing store");
memcpy (continuation->backing_store,
- (void *) __libc_ia64_register_backing_store_base,
+ (void *) thread->register_backing_store_base,
continuation->backing_store_size);
- *first = 1;
+#endif /* __ia64__ */
return cont;
}
else
{
SCM ret = continuation->throw_value;
- *first = 0;
continuation->throw_value = SCM_BOOL_F;
return ret;
}
-#else /* !__ia64__ */
- if (setjmp (continuation->jmpbuf))
- {
- SCM ret = continuation->throw_value;
- *first = 0;
- continuation->throw_value = SCM_BOOL_F;
- return ret;
- }
- else
- {
- *first = 1;
- return cont;
- }
-#endif /* !__ia64__ */
}
#undef FUNC_NAME
copy_stack_data *d = (copy_stack_data *)data;
memcpy (d->dst, d->continuation->stack,
sizeof (SCM_STACKITEM) * d->continuation->num_stack_items);
+#ifdef __ia64__
+ SCM_I_CURRENT_THREAD->pending_rbs_continuation = d->continuation;
+#endif
}
static void
scm_i_set_last_debug_frame (continuation->dframe);
continuation->throw_value = val;
-#ifdef __ia64__
- memcpy ((void *) __libc_ia64_register_backing_store_base,
- continuation->backing_store,
- continuation->backing_store_size);
- setcontext (&continuation->ctx);
-#else
longjmp (continuation->jmpbuf, 1);
-#endif
}
+#ifdef __ia64__
+void
+scm_ia64_longjmp (jmp_buf *JB, int VAL)
+{
+ scm_i_thread *t = SCM_I_CURRENT_THREAD;
+
+ if (t->pending_rbs_continuation)
+ {
+ memcpy (t->register_backing_store_base,
+ t->pending_rbs_continuation->backing_store,
+ t->pending_rbs_continuation->backing_store_size);
+ t->pending_rbs_continuation = NULL;
+ }
+ setcontext (&JB->ctx);
+}
+#endif
+
/* Call grow_stack until the stack space is large enough, then, as the current
* stack frame might get overwritten, let copy_stack_and_call perform the
* actual copying and continuation calling.
scm_init_continuations ()
{
scm_tc16_continuation = scm_make_smob_type ("continuation", 0);
- scm_set_smob_mark (scm_tc16_continuation, continuation_mark);
- scm_set_smob_free (scm_tc16_continuation, continuation_free);
scm_set_smob_print (scm_tc16_continuation, continuation_print);
scm_set_smob_apply (scm_tc16_continuation, continuation_apply, 0, 0, 1);
#include "libguile/continuations.x"