/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8                               :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2023 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ Permission to use, copy, modify, and/or distribute this software for         │
│ any purpose with or without fee is hereby granted, provided that the         │
│ above copyright notice and this permission notice appear in all copies.      │
│                                                                              │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/intrin/cxaatexit.internal.h"
#include "libc/mem/mem.h"

struct Dtor {
  void *fun;
  void *arg;
  struct Dtor *next;
};

static _Thread_local struct Dtor *__cxa_thread_atexit_list;

void __cxa_thread_finalize(void) {
  struct Dtor *dtor;
  while ((dtor = __cxa_thread_atexit_list)) {
    __cxa_thread_atexit_list = dtor->next;
    ((void (*)(void *))dtor->fun)(dtor->arg);
    free(dtor);
  }
}

int __cxa_thread_atexit_impl(void *fun, void *arg, void *dso_symbol) {
  struct Dtor *dtor;
  if (!(dtor = malloc(sizeof(struct Dtor)))) return -1;
  dtor->fun = fun;
  dtor->arg = arg;
  dtor->next = __cxa_thread_atexit_list;
  __cxa_thread_atexit_list = dtor;
  return 0;
}