57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
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/* $OpenBSD: crypto_lock.c,v 1.1 2018/11/11 06:41:28 bcook Exp $ */
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/*
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* Copyright (c) 2019 Brent Cook <bcook@openbsd.org>
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* Copyright (c) 2019 John Norrbin <jlnorrbin@johnex.se>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <windows.h>
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#include <openssl/crypto.h>
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static volatile LPCRITICAL_SECTION locks[CRYPTO_NUM_LOCKS] = { NULL };
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void
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CRYPTO_lock(int mode, int type, const char *file, int line)
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{
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if (type < 0 || type >= CRYPTO_NUM_LOCKS)
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return;
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if (locks[type] == NULL) {
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LPCRITICAL_SECTION lcs = malloc(sizeof(CRITICAL_SECTION));
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if (lcs == NULL) exit(ENOMEM);
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InitializeCriticalSection(lcs);
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if (InterlockedCompareExchangePointer((PVOID*)&locks[type], (PVOID)lcs, NULL) != NULL) {
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DeleteCriticalSection(lcs);
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free(lcs);
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}
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}
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if (mode & CRYPTO_LOCK)
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EnterCriticalSection(locks[type]);
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else
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LeaveCriticalSection(locks[type]);
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}
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int
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CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
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int line)
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{
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/*
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* Windows is LLP64. sizeof(LONG) == sizeof(int) on 32-bit and 64-bit.
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*/
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int ret = InterlockedExchangeAdd((LONG *)pointer, (LONG)amount);
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return ret + amount;
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}
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