/* $OpenBSD: crypto_lock.c,v 1.6 2023/07/08 08:28:23 beck Exp $ */
/*
 * Copyright (c) 2018 Brent Cook <bcook@openbsd.org>
 *
 * Permission to use, copy, modify, and 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 <pthread.h>

#include <openssl/crypto.h>

#include "crypto_internal.h"

static pthread_mutex_t locks[] = {
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
        PTHREAD_MUTEX_INITIALIZER,
};

CTASSERT((sizeof(locks) / sizeof(*locks)) == CRYPTO_NUM_LOCKS);

void
CRYPTO_lock(int mode, int type, const char *file, int line)
{
        if (type < 0 || type >= CRYPTO_NUM_LOCKS)
                return;

        if (mode & CRYPTO_LOCK)
                (void) pthread_mutex_lock(&locks[type]);
        else if (mode & CRYPTO_UNLOCK)
                (void) pthread_mutex_unlock(&locks[type]);
}
LCRYPTO_ALIAS(CRYPTO_lock);

int
CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
    int line)
{
        int ret;

        CRYPTO_lock(CRYPTO_LOCK|CRYPTO_WRITE, type, file, line);
        ret = *pointer + amount;
        *pointer = ret;
        CRYPTO_lock(CRYPTO_UNLOCK|CRYPTO_WRITE, type, file, line);

        return (ret);
}
LCRYPTO_ALIAS(CRYPTO_add_lock);