* async.c, __scm.h: Removed lots of the old async click logic. It

is possible to reinsert it by defining GUILE_OLD_ASYNC_CLICK in
__scm.h.  Let's try this out and dump the old code after the
threads reorganization.
(set-tick-rate, set-switch-rate): Conditionally removed.

libguile/__scm.h

@@ -60,6 +60,9 @@
  * These may be defined or undefined.
  */
 
+/* Old async mechanism */
+/* #define GUILE_OLD_ASYNC_CLICK */
+
 /* New scheme for garbage collection */
 #define GUILE_NEW_GC_SCHEME
 
@@ -250,6 +253,7 @@ typedef long SCM_STACKITEM;
 #define SCM_THREAD_SWITCHING_CODE
 #endif
 
+#ifdef GUILE_OLD_ASYNC_CLICK
 extern unsigned int scm_async_clock;
 
 #define SCM_ASYNC_TICK \
@@ -257,6 +261,15 @@ do { \
   if (0 == --scm_async_clock) \
     scm_async_click (); \
 } while(0)
+#else
+extern int scm_asyncs_pending_p;
+
+#define SCM_ASYNC_TICK /*fixme* should change names */ \
+do { \
+  if (scm_asyncs_pending_p) \
+    scm_async_click (); \
+} while (0)
+#endif
 
 #ifdef SCM_CAREFUL_INTS
 #define SCM_CHECK_NOT_DISABLED \

libguile/async.c

@@ -94,10 +94,11 @@
  * when the interpreter is not running at all.
  */
 int scm_ints_disabled = 1;
+unsigned int scm_mask_ints = 1;
 
+#ifdef GUILE_OLD_ASYNC_CLICK
 unsigned int scm_async_clock = 20;
 static unsigned int scm_async_rate = 20;
-unsigned int scm_mask_ints = 1;
 
 static unsigned int scm_tick_clock = 0;
 static unsigned int scm_tick_rate = 0;
@@ -105,11 +106,15 @@ static unsigned int scm_desired_tick_rate = 0;
 static unsigned int scm_switch_clock = 0;
 static unsigned int scm_switch_rate = 0;
 static unsigned int scm_desired_switch_rate = 0;
+#else
+int scm_asyncs_pending_p = 0;
+#endif
 
 static long scm_tc16_async;
 
 
 
+#ifdef GUILE_OLD_ASYNC_CLICK
 int
 scm_asyncs_pending ()
 {
@@ -128,14 +133,12 @@ scm_asyncs_pending ()
   return 0;
 }
 
-#if 0
 static SCM
 scm_sys_tick_async_thunk (void)
 {
   scm_deliver_signal (SCM_TICK_SIGNAL);
   return SCM_BOOL_F;
 }
-#endif
 
 void
 scm_async_click ()
@@ -252,19 +255,30 @@ scm_async_click ()
     scm_switch ();
 }
 
+#else
+
+void
+scm_async_click ()
+{
+  if (!scm_mask_ints)
+    do
+      scm_run_asyncs (scm_asyncs);
+    while (scm_asyncs_pending_p);
+}
+#endif
 
 
 
 
+#if 0 /* Thread switching code should probably reside here, but the
+         async switching code doesn't seem to work, so it's put in the
+         SCM_DEFER_INTS macro instead. /mdj */
 void
 scm_switch ()
 {
-#if 0 /* Thread switching code should probably reside here, but the
-         async switching code doesn't seem to work, so it's put in the
-         SCM_ASYNC_TICK macro instead. /mdj */
   SCM_THREAD_SWITCHING_CODE;
-#endif
 }
+#endif
 
 
 
@@ -311,7 +325,11 @@ SCM_DEFINE (scm_async_mark, "async-mark", 1, 0, 0,
 {
   struct scm_async * it;
   SCM_VALIDATE_ASYNC_COPY (1,a,it);
+#ifdef GUILE_OLD_ASYNC_CLICK
   it->got_it = 1;
+#else
+  scm_asyncs_pending_p = it->got_it = 1;
+#endif
   return SCM_UNSPECIFIED;
 }
 #undef FUNC_NAME
@@ -325,9 +343,13 @@ SCM_DEFINE (scm_system_async_mark, "system-async-mark", 1, 0, 0,
   struct scm_async * it;
   SCM_VALIDATE_ASYNC_COPY (1,a,it);
   SCM_REDEFER_INTS;
+#ifdef GUILE_OLD_ASYNC_CLICK
   it->got_it = 1;
   scm_async_rate = 1 + scm_async_rate - scm_async_clock;
   scm_async_clock = 1;
+#else
+  scm_asyncs_pending_p = it->got_it = 1;
+#endif
   SCM_REALLOW_INTS;
   return SCM_UNSPECIFIED;
 }
@@ -339,13 +361,16 @@ SCM_DEFINE (scm_run_asyncs, "run-asyncs", 1, 0, 0,
 "")
 #define FUNC_NAME s_scm_run_asyncs
 {
+#ifdef GUILE_OLD_ASYNC_CLICK
   if (scm_mask_ints)
     return SCM_BOOL_F;
+#endif
+  scm_asyncs_pending_p = 0;
   while (list_of_a != SCM_EOL)
     {
       SCM a;
       struct scm_async * it;
-      SCM_VALIDATE_CONS (1,list_of_a);
+      SCM_VALIDATE_CONS (1, list_of_a);
       a = SCM_CAR (list_of_a);
       SCM_VALIDATE_ASYNC_COPY (SCM_ARG1,a,it);
       scm_mask_ints = 1;
@@ -376,6 +401,8 @@ SCM_DEFINE (scm_noop, "noop", 0, 0, 1,
 
 
 
+#ifdef GUILE_OLD_ASYNC_CLICK
+
 SCM_DEFINE (scm_set_tick_rate, "set-tick-rate", 1, 0, 0, 
            (SCM n),
 "")
@@ -407,6 +434,7 @@ SCM_DEFINE (scm_set_switch_rate, "set-switch-rate", 1, 0, 0,
 }
 #undef FUNC_NAME
 
+#endif
 
 
 /* points to the GC system-async, so that scm_gc_end can find it.  */