[iOS NC] LSC: Separate third_party/nearby/internal/platform/implementation/ios to

- third_party/nearby/internal/platform/implementation/ios (for platform)
- third_party/nearby/connections/clients/ios (for connections)
- third_party/nearby/connections/samples/ios (for sample codes)

PiperOrigin-RevId: 440895852

internal/platform/implementation/ios/condition_variable.cc

@@ -0,0 +1,37 @@
+// Copyright 2020 Google LLC
+//
+// 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.
+
+#include "internal/platform/implementation/ios/condition_variable.h"
+
+#include "internal/platform/implementation/ios/mutex.h"
+
+namespace location {
+namespace nearby {
+namespace ios {
+
+Exception ConditionVariable::Wait() {
+  condition_variable_.Wait(mutex_);
+  return {Exception::kSuccess};
+}
+
+Exception ConditionVariable::Wait(absl::Duration timeout) {
+  condition_variable_.WaitWithTimeout(mutex_, timeout);
+  return {Exception::kSuccess};
+}
+
+void ConditionVariable::Notify() { condition_variable_.SignalAll(); }
+
+}  // namespace ios
+}  // namespace nearby
+}  // namespace location