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add simple Windows lock implementation

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Brent Cook 2018-11-11 09:06:13 -06:00
parent 3172a42c45
commit ba2fe0e949
1 changed files with 53 additions and 0 deletions
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crypto/crypto_lock_win.c Normal file
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/* $OpenBSD: crypto_lock.c,v 1.1 2018/11/11 06:41:28 bcook 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 <windows.h>
static HANDLE locks[CRYPTO_NUM_LOCKS];
void
crypto_init_locks(void)
{
int i;
for (i = 0; i < CRYPTO_NUM_LOCKS; i++)
locks[i] = CreateMutex(NULL, FALSE, NULL);
}
void
CRYPTO_lock(int mode, int type, const char *file, int line)
{
if (type < 0 || type >= CRYPTO_NUM_LOCKS)
return;
if (mode & CRYPTO_LOCK)
WaitForSingleObject(locks[type], INFINITE);
else
ReleaseMutex(locks[type]);
}
int
CRYPTO_add_lock(int *pointer, int amount, int type, const char *file,
int line)
{
int ret = 0;
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);
}