bc3aee118a
* Clean-up EntityManager a bit - use tsl::robin_set instead of std::set (which should have been unordered::set anyways). - getListeners() now returns a vector which avoids to traverse a set twice. Turns out that copying the set wasn't as efficient as I thought. * Improve jobsystem a bit We recently added a job reference counting mechanism, but we were a bit too aggressive about taking/release references. Also make the API more complete by adding explicit retain/release, which is needed to allow several threads to wait on the same job. Also improve futex code by inlining it.
35 lines
1.0 KiB
C++
35 lines
1.0 KiB
C++
/*
|
|
* Copyright (C) 2018 The Android Open Source Project
|
|
*
|
|
* 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 <utils/linux/Mutex.h>
|
|
|
|
#include "futex.h"
|
|
|
|
namespace utils {
|
|
|
|
void Mutex::wait() noexcept {
|
|
while (UTILS_UNLIKELY(mState.exchange(LOCKED_CONTENDED, std::memory_order_acquire) != UNLOCKED)) {
|
|
linuxutil::futex_wait_ex(&mState, false, LOCKED_CONTENDED, false, nullptr);
|
|
}
|
|
}
|
|
|
|
void Mutex::wake() noexcept {
|
|
linuxutil::futex_wake_ex(&mState, false, LOCKED);
|
|
}
|
|
|
|
} // namespace utils
|
|
|