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/* -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* Copyright 2011 Couchbase, Inc.
*
* 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.
*/
#include "config.h"
#include "atomic.hh"
SpinLock::SpinLock() : lock(0) {
EP_SPINLOCK_CREATED(this);
}
SpinLock::~SpinLock() {
assert(lock == 0);
EP_SPINLOCK_DESTROYED(this);
}
void SpinLock::acquire(void) {
int spin = 0;
while (!tryAcquire()) {
++spin;
if (spin > 64) {
sched_yield();
}
}
EP_SPINLOCK_ACQUIRED(this, spin);
}
void SpinLock::release(void) {
ep_sync_lock_release(&lock);
EP_SPINLOCK_RELEASED(this);
}
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