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/* Inferior process information for the remote server for GDB.

   Copyright 2002

   Free Software Foundation, Inc.

   Contributed by MontaVista Software.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 2 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program; if not, write to the Free Software

   Foundation, Inc., 59 Temple Place - Suite 330,

   Boston, MA 02111-1307, USA.  */

#include <stdlib.h>

#include "server.h"

struct thread_info

{

  struct inferior_list_entry entry;

  void *target_data;

  void *regcache_data;

};

struct inferior_list all_threads;

struct thread_info *current_inferior;

#define get_thread(inf) ((struct thread_info *)(inf))

void

add_inferior_to_list (struct inferior_list *list,

                      struct inferior_list_entry *new_inferior)

{

  new_inferior->next = NULL;

  if (list->tail != NULL)

    list->tail->next = new_inferior;

  else

    list->head = new_inferior;

  list->tail = new_inferior;

}

void

for_each_inferior (struct inferior_list *list,

                   void (*action) (struct inferior_list_entry *))

{

  struct inferior_list_entry *cur = list->head, *next;

  while (cur != NULL)

    {

      next = cur->next;

      (*action) (cur);

      cur = next;

    }

}

void

change_inferior_id (struct inferior_list *list,

                    int new_id)

{

  if (list->head != list->tail)

    error ("tried to change thread ID after multiple threads are created");

  list->head->id = new_id;

}

void

remove_inferior (struct inferior_list *list,

                 struct inferior_list_entry *entry)

{

  struct inferior_list_entry **cur;

  if (list->head == entry)

    {

      list->head = entry->next;

      if (list->tail == entry)

        list->tail = list->head;

      return;

    }

  cur = &list->head;

  while (*cur && (*cur)->next != entry)

    cur = &(*cur)->next;

  if (*cur == NULL)

    return;

  (*cur)->next = entry->next;

  if (list->tail == entry)

    list->tail = *cur;

}

void

add_thread (int thread_id, void *target_data)

{

  struct thread_info *new_thread

    = (struct thread_info *) malloc (sizeof (*new_thread));

  memset (new_thread, 0, sizeof (*new_thread));

  new_thread->entry.id = thread_id;

  add_inferior_to_list (&all_threads, & new_thread->entry);

  if (current_inferior == NULL)

    current_inferior = new_thread;

  new_thread->target_data = target_data;

  set_inferior_regcache_data (new_thread, new_register_cache ());

}

static void

free_one_thread (struct inferior_list_entry *inf)

{

  struct thread_info *thread = get_thread (inf);

  free_register_cache (inferior_regcache_data (thread));

  free (thread);

}

void

remove_thread (struct thread_info *thread)

{

  remove_inferior (&all_threads, (struct inferior_list_entry *) thread);

  free_one_thread (&thread->entry);

}

void

clear_inferiors (void)

{

  for_each_inferior (&all_threads, free_one_thread);

  all_threads.head = all_threads.tail = NULL;

}

struct inferior_list_entry *

find_inferior (struct inferior_list *list,

               int (*func) (struct inferior_list_entry *, void *), void *arg)

{

  struct inferior_list_entry *inf = list->head;

  while (inf != NULL)

    {

      if ((*func) (inf, arg))

        return inf;

      inf = inf->next;

    }

  return NULL;

}

struct inferior_list_entry *

find_inferior_id (struct inferior_list *list, int id)

{

  struct inferior_list_entry *inf = list->head;

  while (inf != NULL)

    {

      if (inf->id == id)

        return inf;

      inf = inf->next;

    }

  return NULL;

}

void *

inferior_target_data (struct thread_info *inferior)

{

  return inferior->target_data;

}

void

set_inferior_target_data (struct thread_info *inferior, void *data)

{

  inferior->target_data = data;

}

void *

inferior_regcache_data (struct thread_info *inferior)

{

  return inferior->regcache_data;

}

void

set_inferior_regcache_data (struct thread_info *inferior, void *data)

{

  inferior->regcache_data = data;

}