1 // Copyright 2020 The Pigweed Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not 4 // use this file except in compliance with the License. You may obtain a copy of 5 // the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12 // License for the specific language governing permissions and limitations under 13 // the License. 14 #pragma once 15 16 #include "pw_sync/interrupt_spin_lock.h" 17 18 namespace pw::sync { 19 InterruptSpinLock()20constexpr InterruptSpinLock::InterruptSpinLock() 21 : native_type_{.state = backend::NativeInterruptSpinLock::State::kUnlocked, 22 .saved_interrupt_mask = 0, 23 .saved_preemption_threshold = 0} {} 24 25 inline InterruptSpinLock::native_handle_type native_handle()26InterruptSpinLock::native_handle() { 27 return native_type_; 28 } 29 try_lock()30inline bool InterruptSpinLock::try_lock() { 31 // This backend does not support SMP and on a uniprocesor we cannot actually 32 // fail to acquire the lock. Recursive locking is already detected by lock(). 33 lock(); 34 return true; 35 } 36 37 } // namespace pw::sync 38