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/* $OpenBSD: crypto_lock.c,v 1.1 2018/11/11 06:41:28 bcook Exp $ */
/*
* Copyright (c) 2019 Brent Cook <bcook@openbsd.org>
* Copyright (c) 2019 John Norrbin <jlnorrbin@johnex.se>
*
* 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 <windows.h>
#include <openssl/crypto.h>
static volatile LPCRITICAL_SECTION locks[CRYPTO_NUM_LOCKS] = { NULL };
void
CRYPTO_lock(int mode, int type, const char *file, int line)
{
if (type < 0 || type >= CRYPTO_NUM_LOCKS)
return;
if (locks[type] == NULL) {
LPCRITICAL_SECTION lcs = malloc(sizeof(CRITICAL_SECTION));
if (lcs == NULL) exit(ENOMEM);
InitializeCriticalSection(lcs);
if (InterlockedCompareExchangePointer((PVOID*)&locks[type], (PVOID)lcs, NULL) != NULL) {
DeleteCriticalSection(lcs);
free(lcs);
}
}
if (mode & CRYPTO_LOCK)
EnterCriticalSection(locks[type]);
else
LeaveCriticalSection(locks[type]);
}
int
CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
int line)
{
/*
* Windows is LLP64. sizeof(LONG) == sizeof(int) on 32-bit and 64-bit.
*/
int ret = InterlockedExchangeAdd((LONG *)pointer, (LONG)amount);
return ret + amount;
}
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