===================================================================
RCS file: /home/cvs/OpenXM/src/ox_math/serv1.c,v
retrieving revision 1.14
retrieving revision 1.15
diff -u -p -r1.14 -r1.15
--- OpenXM/src/ox_math/serv1.c	2000/12/03 22:09:34	1.14
+++ OpenXM/src/ox_math/serv1.c	2000/12/07 10:04:56	1.15
@@ -1,5 +1,5 @@
 /* -*- mode: C; coding: euc-japan -*- */
-/* $OpenXM: OpenXM/src/ox_math/serv1.c,v 1.13 2000/12/03 21:46:52 ohara Exp $ */
+/* $OpenXM: OpenXM/src/ox_math/serv1.c,v 1.14 2000/12/03 22:09:34 ohara Exp $ */
 
 /* 
    Copyright (C) Katsuyoshi OHARA, 2000.
@@ -21,65 +21,27 @@
 extern OXFILE *stack_oxfp;
 
 /* if in_critical equals to 1 then we do not permit an interrupt. */
-static int in_critical = 0; 
-static int already_send_ox_sync_ball = 0;
 static int flag_sigusr1 = 0;
 
-static int send_ox_sync_ball();
-
-static int set_critical()
-{
-    in_critical = 1;
-}
-
-static int unset_critical()
-{
-    in_critical = 0;
-}
-
-static int critical_p() {
-    return in_critical;
-}
-
 /* SM_control_reset_connection */
-static int handler_reset1()
+static void handler()
 {
     fprintf(stderr, "signal received.\n");
-    signal(SIGUSR1, handler_reset1);
-    if (!flag_sigusr1) {
-        flag_sigusr1 = 1;
-        if(critical_p()) {
-            send_ox_sync_ball();
-            already_send_ox_sync_ball = 1;
-        }
-    }
+    signal(SIGUSR1, handler);
+    flag_sigusr1++;
 }
 
-static int handler_kill()
+static int exchange_ox_sync_ball(OXFILE *oxfp)
 {
-    oxf_close(stack_oxfp);
-    exit(1);
-}
-
-static int send_ox_sync_ball()
-{
-    fprintf(stderr, "sending a sync_ball.\n");
-    send_ox_tag(stack_oxfp, OX_SYNC_BALL);
-}
-
-static int exchange_ox_sync_ball()
-{
     int tag;
-
-    while((tag = receive_ox_tag(stack_oxfp)) != OX_SYNC_BALL) {
-        /* skipping a message. */
+    send_ox_tag(oxfp, OX_SYNC_BALL);
+    while((tag = receive_ox_tag(oxfp)) != OX_SYNC_BALL) {
         if (tag == OX_DATA) {
-            receive_cmo(stack_oxfp);
-        }else {
-            receive_int32(stack_oxfp);
+            receive_cmo(oxfp);
+        }else if (tag == OX_COMMAND) {
+            receive_int32(oxfp);
         }
     }
-    fprintf(stderr, "received a sync_ball.\n");
 }
 
 int shutdown()
@@ -99,8 +61,7 @@ int main()
     ml_init();
     mathcap_init(VERSION, ID_STRING, "ox_math", NULL, NULL);
 
-    signal(SIGUSR1, handler_reset1);
-    signal(SIGKILL, handler_kill);
+    signal(SIGUSR1, handler);
 
     sv = oxf_open(3);
     oxf_determine_byteorder_server(sv);
@@ -124,13 +85,10 @@ int sm_receive_ox()
         break;
     case OX_COMMAND:
         code = receive_sm_command(stack_oxfp);
-        set_critical();
         sm_run(code);
-        unset_critical();
         break;
     default:
         fprintf(stderr, "illeagal message? ox_tag = (%d)\n", tag);
-        return 0;
         break;
     }
     return 1;
@@ -138,17 +96,18 @@ int sm_receive_ox()
 
 int sm(OXFILE *oxfp)
 {
+	int mask;
     stack_oxfp = oxfp;
     stack_extend();
+
+    mask = sigsetmask(sigmask(SIGUSR1));
     while(sm_receive_ox()) {
+        sigsetmask(mask);
+        usleep(1);
+        sigsetmask(sigmask(SIGUSR1));
         if(flag_sigusr1) {
-            if (!already_send_ox_sync_ball) {
-              send_ox_sync_ball();
-                already_send_ox_sync_ball = 1;
-            }
-            exchange_ox_sync_ball();
+            exchange_ox_sync_ball(oxfp);
             flag_sigusr1 = 0;
-            already_send_ox_sync_ball = 0;
         }
     }
     fprintf(stderr, "SM: socket(%d) is closed.\n", stack_oxfp->fd);