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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
#include <windows.h>
#include <isc/assertions.h>
#include <isc/once.h>
#include <isc/util.h>
isc_result_t
isc_once_do(isc_once_t *controller, void (*function)(void)) {
REQUIRE(controller != NULL && function != NULL);
if (controller->status == ISC_ONCE_INIT_NEEDED) {
if (InterlockedDecrement(&controller->counter) == 0) {
if (controller->status == ISC_ONCE_INIT_NEEDED) {
function();
controller->status = ISC_ONCE_INIT_DONE;
}
} else {
while (controller->status == ISC_ONCE_INIT_NEEDED) {
/*
* Sleep(0) indicates that this thread
* should be suspended to allow other
* waiting threads to execute.
*/
Sleep(0);
}
}
}
return (ISC_R_SUCCESS);
}
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