/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-â
âvi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :viâ
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â Copyright 2020 Justine Alexandra Roberts Tunney                              â
â                                                                              â
â Permission to use, copy, modify, and/or distribute this software for         â
â any purpose with or without fee is hereby granted, provided that the         â
â above copyright notice and this permission notice appear in all copies.      â
â                                                                              â
â THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                â
â WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                â
â WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             â
â AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         â
â DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        â
â PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               â
â TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             â
â PERFORMANCE OF THIS SOFTWARE.                                                â
ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ*/
#include "libc/log/check.h"
#include "libc/mem/mem.h"
#include "tool/build/lib/fds.h"

int MachineFdAdd(struct MachineFds *mf) {
  int fd;
  struct MachineFdClosed *closed;
  if ((closed = mf->closed)) {
    fd = closed->fd;
    mf->closed = closed->next;
    free(closed);
  } else {
    fd = mf->i;
    if (mf->i++ == mf->n) {
      mf->n = mf->i + (mf->i >> 1);
      mf->p = realloc(mf->p, mf->n * sizeof(*mf->p));
    }
  }
  return fd;
}

void MachineFdRemove(struct MachineFds *mf, int fd) {
  struct MachineFdClosed *closed;
  mf->p[fd].cb = NULL;
  if ((closed = malloc(sizeof(struct MachineFdClosed)))) {
    closed->fd = fd;
    closed->next = mf->closed;
    mf->closed = closed;
  }
}
