/*
 * Copyright (C) 2014-2016
 *     Olivier Gayot <ogayot@baylibre.com>
 *     Bartosz Golaszewski <bgolaszewski@baylibre.com>
 *     Olivier Gayot <olivier.gayot@sigexec.com>
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef MISC_H
#define MISC_H

#include <sys/time.h>

#define ssizeof(_foo)  ((signed long)(sizeof((_foo))))
#define countof(_array)  (ssizeof((_array)) / ssizeof((_array)[0]))

#define unsafe_free(_ptr) free((_ptr))
#define safe_free(_ptr) \
    do { \
        free((_ptr)); \
        (_ptr) = NULL; \
    } while (0)

#ifdef CONFIG_DEBUG
#define IF_DEBUG(...) __VA_ARGS__
#else
#define IF_DEBUG(...)
#endif

#define TV_FMT          "(%d.%d)"
#define TV_PRINT(TV)    (int)(TV).tv_sec, (int)(TV).tv_usec

/*
 * Returns 1 if a file descriptor is ready for writing, 0 otherwise or -1
 * on error.
 */
int caod_fd_wrready(int sock, struct timeval *tv);

/*
 * Returns 1 if a file descriptor is ready for reading, 0 otherwise or -1
 * on error.
 */
int caod_fd_rdready(int sock, struct timeval *tv);

#endif /* MISC_H */