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// Copyright 2021 The Pigweed Authors
//
// 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
//
// https://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.
#pragma once
#include "pw_assert/assert.h"
#include "pw_sync/interrupt_spin_lock.h"
#include "pw_sync/yield_core.h"
namespace pw::sync {
constexpr InterruptSpinLock::InterruptSpinLock() : native_type_() {}
inline void InterruptSpinLock::lock() { PW_ASSERT(try_lock()); }
inline bool InterruptSpinLock::try_lock() {
// TODO(pwbug/303): Use the pw_interrupt API here to disable interrupts.
return !native_type_.test_and_set(std::memory_order_acquire);
}
inline void InterruptSpinLock::unlock() {
native_type_.clear(std::memory_order_release);
}
inline InterruptSpinLock::native_handle_type
InterruptSpinLock::native_handle() {
return native_type_;
}
} // namespace pw::sync
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