1 // Copyright 2020 The Pigweed Authors
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
7 // https://www.apache.org/licenses/LICENSE-2.0
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
16 #include "pw_chrono/system_clock.h"
17 #include "pw_sync/counting_semaphore.h"
19 using pw::chrono::SystemClock;
23 inline CountingSemaphore::CountingSemaphore()
24 : native_type_{.mutex = {}, .condition = {}, .count = 0} {}
26 inline CountingSemaphore::~CountingSemaphore() {}
28 inline bool CountingSemaphore::try_acquire_for(
29 chrono::SystemClock::duration for_at_least) {
30 // Due to spurious condition variable wakeups this cannot use wait_for().
31 return try_acquire_until(chrono::SystemClock::now() + for_at_least);
34 inline CountingSemaphore::native_handle_type
35 CountingSemaphore::native_handle() {
39 } // namespace pw::sync