src/nobug_thread.c

   1 /*
   2  This file is part of the NoBug debugging library.
   3
   4  Copyright (C) 2007, 2008, Christian Thaeter <chth@gmx.net>
   5
   6  This program is free software; you can redistribute it and/or modify
   7  it under the terms of the GNU General Public License as published by
   8  the Free Software Foundation; either version 2 of the License, or
   9  (at your option) any later version.
  10
  11  This program is distributed in the hope that it will be useful,
  12  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  GNU General Public License for more details.
  15
  16  You should have received a copy of the GNU General Public License
  17  along with this program; if not, contact Christian Thaeter <ct@pipapo.org>.
  18 */
  19 #define NOBUG_LIBNOBUG_C
  20 #include "nobug.h"
  21 #include "llist.h"
  22
  23 pthread_mutex_t nobug_logging_mutex = PTHREAD_MUTEX_INITIALIZER;
  24
  25
  26 /*
  27   thread id handling
  28 */
  29 pthread_key_t nobug_tls_key;
  30 static unsigned nobug_thread_cnt = 0;
  31
  32
  33 struct nobug_tls_data*
  34 nobug_thread_set (const char* name)
  35 {
  36   char buf[256];
  37   snprintf (buf, 256, "%s_%d", name, ++nobug_thread_cnt);
  38   struct nobug_tls_data * tls = pthread_getspecific (nobug_tls_key);
  39   if (!tls)
  40     {
  41       tls = malloc (sizeof *tls);
  42       if (!tls) abort();
  43       tls->thread_id = strdup(buf);
  44       tls->data = NULL;
  45       if (!tls->thread_id) abort();
  46       llist_init (&tls->res_stack);
  47       pthread_setspecific (nobug_tls_key, tls);
  48     }
  49   else
  50     {
  51       //TODO assert that the thread holds no resources when the id gets reset
  52       free ((char*)tls->thread_id);
  53       tls->thread_id = strdup(buf);
  54       if (!tls->thread_id) abort();
  55       llist_init (&tls->res_stack);
  56     }
  57
  58   return tls;
  59 }
  60
  61
  62 struct nobug_tls_data*
  63 nobug_thread_get (void)
  64 {
  65   struct nobug_tls_data* tls = pthread_getspecific (nobug_tls_key);
  66   if (!tls)
  67     return nobug_thread_set ("thread");
  68
  69   return tls;
  70 }
  71
  72
  73 const char*
  74 nobug_thread_id_set (const char* name)
  75 {
  76   return nobug_thread_set (name) -> thread_id;
  77 }
  78
  79
  80 const char*
  81 nobug_thread_id_get (void)
  82 {
  83   return nobug_thread_get () -> thread_id;
  84 }
  85
  86
  87 void**
  88 nobug_thread_data (void)
  89 {
  90   return &nobug_thread_get () -> data;
  91 }
  92