tube.c

   1 /* tube.c - tubes implementation */
   2
   3 /* Copyright (C) 2008 Keith Rarick and Philotic Inc.
   4
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <stdlib.h>
  20 #include <string.h>
  21
  22 #include "stat.h"
  23 #include "tube.h"
  24 #include "prot.h"
  25 #include "util.h"
  26
  27 tube
  28 make_tube(const char *name)
  29 {
  30     tube t;
  31
  32     t = malloc(sizeof(struct tube));
  33     if (!t) return NULL;
  34
  35     t->refs = 0;
  36
  37     t->name[MAX_TUBE_NAME_LEN - 1] = '\0';
  38     strncpy(t->name, name, MAX_TUBE_NAME_LEN - 1);
  39     if (t->name[MAX_TUBE_NAME_LEN - 1] != '\0') twarnx("truncating tube name");
  40
  41     pq_init(&t->ready, job_pri_cmp);
  42     t->buried = (struct job) { &t->buried, &t->buried, 0 };
  43     ms_init(&t->waiting, NULL, NULL);
  44
  45     t->stat = (struct stats) {0, 0, 0, 0};
  46     t->using_ct = t->watching_ct = 0;
  47
  48     return t;
  49 }
  50
  51 static void
  52 tube_free(tube t)
  53 {
  54     prot_remove_tube(t);
  55     pq_clear(&t->ready);
  56     ms_clear(&t->waiting);
  57     free(t);
  58 }
  59
  60 void
  61 tube_dref(tube t)
  62 {
  63     if (!t) return;
  64     if (t->refs < 1) return twarnx("refs is zero for tube: %s", t->name);
  65
  66     --t->refs;
  67     if (t->refs < 1) tube_free(t);
  68 }
  69
  70 void
  71 tube_iref(tube t)
  72 {
  73     if (!t) return;
  74     ++t->refs;
  75 }