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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/kernel/spinlock.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* COPYRIGHT International Business Machines Corp. 2010,2014 */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
#include <kernel/spinlock.H>
#include <arch/ppc.H>
void Spinlock::lock()
{
uint64_t reservation = __sync_fetch_and_add(&iv_reserve, 1);
if (iv_ready != reservation)
{
do
{
setThreadPriorityLow();
}
while(iv_ready != reservation);
setThreadPriorityHigh();
}
isync();
}
void Spinlock::unlock()
{
__sync_add_and_fetch(&iv_ready, 1);
}
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