/*

  Copyright 2023 Northern.tech AS

  This file is part of CFEngine 3 - written and maintained by Northern.tech AS.

  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; version 3.

  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

  To the extent this program is licensed as part of the Enterprise

  versions of CFEngine, the applicable Commercial Open Source License

  (COSL) may apply to this file if you as a licensee so wish it. See

  included file COSL.txt.

*/

#include <alloc.h>

#include <cleanup.h>

#include <platform.h>

typedef struct CleanupList

{

    CleanupFn fn;

    struct CleanupList *next;

} CleanupList;

static pthread_mutex_t cleanup_functions_mutex = PTHREAD_MUTEX_INITIALIZER;

static CleanupList *cleanup_functions;

/* To be called externally only by Windows binaries */

void CallCleanupFunctions(void)

{

    pthread_mutex_lock(&cleanup_functions_mutex);

    CleanupList *p = cleanup_functions;

    while (p)

    {

        CleanupList *cur = p;

        (cur->fn)();

        p = cur->next;

        free(cur);

    }

    cleanup_functions = NULL;

    pthread_mutex_unlock(&cleanup_functions_mutex);

}

void DoCleanupAndExit(int ret)

{

    CallCleanupFunctions();

    exit(ret);

}

void RegisterCleanupFunction(CleanupFn fn)

{

    pthread_mutex_lock(&cleanup_functions_mutex);

    CleanupList *p = xmalloc(sizeof(CleanupList));

    p->fn = fn;

    p->next = cleanup_functions;

    cleanup_functions = p;

    pthread_mutex_unlock(&cleanup_functions_mutex);

}