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Annotation of OpenXM/src/ox_math/serv1.c, Revision 1.10

1.1       ohara       1: /* -*- mode: C; coding: euc-japan -*- */
1.10    ! ohara       2: /* $OpenXM: OpenXM/src/ox_math/serv1.c,v 1.9 2000/03/10 12:38:47 ohara Exp $ */
1.8       ohara       3:
                      4: /*
                      5:    Copyright (C) Katsuyoshi OHARA, 2000.
                      6:    Portions copyright 1999 Wolfram Research, Inc.
                      7:
                      8:    You must see OpenXM/Copyright/Copyright.generic.
                      9:    The MathLink Library is licensed from Wolfram Research Inc..
                     10:    See OpenXM/Copyright/Copyright.mathlink for detail.
                     11: */
1.1       ohara      12:
                     13: #include <stdio.h>
                     14: #include <stdlib.h>
                     15: #include <unistd.h>
                     16: #include <signal.h>
                     17: #include <mathlink.h>
1.9       ohara      18: #include <ox_toolkit.h>
1.1       ohara      19: #include "serv2.h"
                     20:
1.10    ! ohara      21: static int send_ox_sync_ball();
1.2       ohara      22:
1.10    ! ohara      23: static OXFILE *sv;
1.1       ohara      24:
                     25: static int flag_sigusr1 = 0;
                     26: static int flag_sigusr2 = 0;
                     27:
1.7       ohara      28: /* if in_critical equals to 1 then we do not permit an interrupt. */
1.1       ohara      29: static int in_critical = 0;
                     30:
                     31: static int set_critical()
                     32: {
                     33:     in_critical = 1;
                     34: }
                     35:
                     36: static int unset_critical()
                     37: {
                     38:     in_critical = 0;
                     39: }
                     40:
                     41: static int critical_p() {
                     42:     return in_critical;
                     43: }
                     44:
                     45: static int already_send_ox_sync_ball = 0;
                     46:
                     47: /* SM_control_reset_connection */
                     48: static int handler_reset1()
                     49: {
                     50:     fprintf(stderr, "signal received.\n");
                     51:     signal(SIGUSR1, handler_reset1);
                     52:     if (!flag_sigusr1) {
                     53:         flag_sigusr1 = 1;
                     54:         if(critical_p()) {
1.10    ! ohara      55:             send_ox_sync_ball();
1.1       ohara      56:             already_send_ox_sync_ball = 1;
                     57:         }
                     58:     }
                     59: }
                     60:
                     61: static int handler_kill()
                     62: {
1.10    ! ohara      63:        oxf_close(sv);
1.1       ohara      64:     exit(1);
                     65: }
                     66:
1.10    ! ohara      67: static int send_ox_sync_ball()
1.1       ohara      68: {
                     69:     fprintf(stderr, "sending a sync_ball.\n");
1.10    ! ohara      70:     send_ox_tag(sv, OX_SYNC_BALL);
1.1       ohara      71: }
                     72:
1.10    ! ohara      73: static int exchange_ox_syncball()
1.1       ohara      74: {
                     75:     int tag;
                     76:
1.10    ! ohara      77:     while((tag = receive_ox_tag(sv)) != OX_SYNC_BALL) {
1.1       ohara      78:         /* skipping a message. */
                     79:         if (tag == OX_DATA) {
1.10    ! ohara      80:             receive_cmo(sv);
1.1       ohara      81:         }else {
1.10    ! ohara      82:             receive_int32(sv);
1.1       ohara      83:         }
                     84:     }
                     85:     fprintf(stderr, "received a sync_ball.\n");
                     86: }
                     87:
1.7       ohara      88: /* a part of stack machine. */
1.10    ! ohara      89: int receive_ox(OXFILE *oxfp)
1.1       ohara      90: {
                     91:     int tag;
                     92:     int code;
                     93:
1.10    ! ohara      94:     tag = receive_ox_tag(oxfp);
1.1       ohara      95:     switch(tag) {
                     96:     case OX_DATA:
1.10    ! ohara      97:         push(receive_cmo(oxfp));
1.1       ohara      98:         break;
                     99:     case OX_COMMAND:
1.10    ! ohara     100:         code = receive_sm_command(oxfp);
1.1       ohara     101:         set_critical();
1.10    ! ohara     102:         execute_sm_command(oxfp, code);
1.1       ohara     103:         unset_critical();
                    104:         break;
                    105:     default:
                    106:         fprintf(stderr, "illeagal message? ox_tag = (%d)\n", tag);
                    107:         return -1;
                    108:         break;
                    109:     }
                    110:     return 0;
                    111: }
                    112:
1.4       ohara     113: int shutdown()
                    114: {
1.10    ! ohara     115:     oxf_close(sv);
1.6       ohara     116:     ml_exit();
                    117:     exit(0);
1.4       ohara     118: }
                    119:
1.1       ohara     120: int main()
                    121: {
1.10    ! ohara     122:        sv = oxf_open(3);
        !           123:
1.6       ohara     124:     ml_init();
1.1       ohara     125:     initialize_stack();
                    126:
                    127:     signal(SIGUSR1, handler_reset1);
                    128:     signal(SIGKILL, handler_kill);
                    129:
1.10    ! ohara     130:        oxf_determine_byteorder_server(sv);
1.1       ohara     131:
                    132:     while(1) {
1.10    ! ohara     133:         receive_ox(sv);
1.1       ohara     134:         if(flag_sigusr1) {
                    135:             if (!already_send_ox_sync_ball) {
1.10    ! ohara     136:               send_ox_sync_ball();
1.1       ohara     137:                 already_send_ox_sync_ball = 1;
                    138:             }
1.10    ! ohara     139:             exchange_ox_syncball();
1.1       ohara     140:             flag_sigusr1 = 0;
                    141:             already_send_ox_sync_ball = 0;
                    142:         }
                    143:     }
1.4       ohara     144:     shutdown();
1.1       ohara     145: }