144 lines
3.8 KiB
C
144 lines
3.8 KiB
C
/*
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* CIF support code for Tock programs
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* Copyright (C) 2008 University of Kent
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*
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* This library is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or (at
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* your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
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* General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef TOCK_SUPPORT_CIF_H
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#define TOCK_SUPPORT_CIF_H
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#include <cif.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include <termios.h>
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#include <unistd.h>
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//{{{ occam_stop
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#define occam_stop(pos, nargs, format, args...) \
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do { \
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ExternalCallN (fprintf, 3 + nargs, stderr, \
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"Program stopped at %s: " format "\n", \
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pos, ##args); \
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SetErr (); \
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} while (0)
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//}}}
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#include <tock_support.h>
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//{{{ channel array initialisation
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static inline void tock_init_chan_array (Channel *, Channel **, int) occam_unused;
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static inline void tock_init_chan_array (Channel *pointTo, Channel **pointFrom, int count) {
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for (int i = 0; i < count; i++) {
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pointFrom[i] = &(pointTo[i]);
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}
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}
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//}}}
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//{{{ top-level process interface
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static void tock_tlp_input_bcall (FILE *in, int *ch) occam_unused;
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static void tock_tlp_input_bcall (FILE *in, int *ch) {
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*ch = fgetc (in);
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}
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static void tock_tlp_input (Workspace wptr) occam_unused;
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static void tock_tlp_input (Workspace wptr) {
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Channel *out = ProcGetParam (wptr, 0, Channel *);
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Channel *kill = ProcGetParam (wptr, 1, Channel *);
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FILE *in = ProcGetParam (wptr, 2, FILE *);
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while (true) {
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int ch = -1;
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KillableBlockingCallN (wptr, tock_tlp_input_bcall, kill, 2, in, &ch);
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if (ch == -1) {
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// The call was killed -- exit.
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break;
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}
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ChanOutChar (wptr, out, ch);
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}
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}
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static void tock_tlp_input_kill (Workspace wptr, Channel *kill) occam_unused;
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static void tock_tlp_input_kill (Workspace wptr, Channel *kill) {
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while (true) {
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// If KillBlockingCall returns -1, the call hasn't started yet,
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// so we reschedule and try again. (If tock_tlp_input is
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// blocked on output we should deadlock anyway.)
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if (KillBlockingCall (wptr, kill) != -1)
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break;
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Reschedule (wptr);
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}
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}
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static void tock_tlp_output (Workspace wptr) occam_unused;
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static void tock_tlp_output (Workspace wptr) {
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Channel *in = ProcGetParam (wptr, 0, Channel *);
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Channel *kill = ProcGetParam (wptr, 1, Channel *);
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FILE *out = ProcGetParam (wptr, 2, FILE *);
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while (true) {
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switch (ProcAlt (wptr, in, kill, NULL)) {
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case 0: {
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uint8_t ch;
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ChanIn (wptr, in, &ch, sizeof ch);
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if (ch == 255) { // FLUSH
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fflush (out);
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} else {
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ExternalCallN (fputc, 2, ch, out);
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}
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break;
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}
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case 1: {
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bool b;
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ChanIn (wptr, kill, &b, sizeof b);
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return;
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}
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}
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}
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}
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static void tock_tlp_output_kill (Workspace wptr, Channel *kill) occam_unused;
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static void tock_tlp_output_kill (Workspace wptr, Channel *kill) {
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bool b = true;
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ChanOut (wptr, kill, &b, sizeof b);
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}
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//}}}
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//{{{ CCSP startup and terminal handling
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static void tock_exit_handler (int status, word core) occam_unused;
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static void tock_exit_handler (int status, word core) {
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tock_restore_terminal();
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ccsp_default_exit_handler (status, core);
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}
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static void tock_init_ccsp (bool uses_stdin) occam_unused;
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static void tock_init_ccsp (bool uses_stdin) {
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ccsp_set_branding ("Tock");
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tock_configure_terminal(uses_stdin);
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if (!ccsp_init ())
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exit (1);
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ccsp_set_exit_handler (tock_exit_handler);
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}
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//}}}
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#endif
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