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/*
* util.h -- Utilities.
*
* This file is donated to the Tox Project.
* Copyright 2013 plutooo
*
* Copyright (C) 2013 Tox project All Rights Reserved.
*
* This file is part of Tox.
*
* Tox 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 3 of the License, or
* (at your option) any later version.
*
* Tox 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 Tox. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __UTIL_H__
#define __UTIL_H__
#include <stdbool.h>
#include <stdint.h>
#include <pthread.h>
#define MIN(a,b) (((a)<(b))?(a):(b))
#define PAIR(TYPE1__, TYPE2__) struct { TYPE1__ first; TYPE2__ second; }
void unix_time_update();
uint64_t unix_time();
int is_timeout(uint64_t timestamp, uint64_t timeout);
/* id functions */
bool id_equal(const uint8_t *dest, const uint8_t *src);
uint32_t id_copy(uint8_t *dest, const uint8_t *src); /* return value is CLIENT_ID_SIZE */
void host_to_net(uint8_t *num, uint16_t numbytes);
#define net_to_host(x, y) host_to_net(x, y)
uint16_t lendian_to_host16(uint16_t lendian);
#define host_tolendian16(x) lendian_to_host16(x)
void host_to_lendian32(uint8_t *dest, uint32_t num);
void lendian_to_host32(uint32_t *dest, const uint8_t *lendian);
/* state load/save */
typedef int (*load_state_callback_func)(void *outer, const uint8_t *data, uint32_t len, uint16_t type);
int load_state(load_state_callback_func load_state_callback, void *outer,
const uint8_t *data, uint32_t length, uint16_t cookie_inner);
/* Returns -1 if failed or 0 if success */
int create_recursive_mutex(pthread_mutex_t *mutex);
/* Ring buffer */
typedef struct RingBuffer RingBuffer;
bool rb_full(const RingBuffer *b);
bool rb_empty(const RingBuffer *b);
void *rb_write(RingBuffer *b, void *p);
bool rb_read(RingBuffer *b, void **p);
RingBuffer *rb_new(int size);
void rb_kill(RingBuffer *b);
uint16_t rb_size(const RingBuffer *b);
uint16_t rb_data(const RingBuffer *b, void **dest);
#endif /* __UTIL_H__ */
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