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()20 constexpr InterruptSpinLock::InterruptSpinLock()
21     : native_type_{.locked = false, .saved_interrupt_mask = 0} {}
22 
23 inline InterruptSpinLock::native_handle_type
native_handle()24 InterruptSpinLock::native_handle() {
25   return native_type_;
26 }
27 
try_lock()28 inline bool InterruptSpinLock::try_lock() {
29   // This backend does not support SMP and on a uniprocesor we cannot actually
30   // fail to acquire the lock. Recursive locking is already detected by lock().
31   lock();
32   return true;
33 }
34 
35 }  // namespace pw::sync
36