Release based on cl/313536507.

Signed-off-by: Alexey Polyudov <apolyudov@google.com>
Change-Id: I83ec7dee1a7ef6f4bdfd47482c94d03910525b7e

cpp/platform/impl/g3/BUILD

@@ -0,0 +1,40 @@
+# 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.
+
+cc_library(
+    name = "g3",
+    srcs = [
+        "atomic_reference_impl.h",
+        "platform.cc",
+        "settable_future_impl.h",
+        "system_clock_impl.h",
+    ],
+    visibility = [
+        "//googlemac/iPhone/Shared/Nearby/Connections:__subpackages__",
+        "//core:__subpackages__",
+        "//platform:__subpackages__",
+    ],
+    deps = [
+        "//platform:types",
+        "//platform/api",
+        "//platform/impl/shared:atomic_boolean",
+        "//platform/impl/shared:posix_condition_variable",
+        "//platform/impl/shared:posix_lock",
+        "//platform/port:string",
+        "//absl/base:core_headers",
+        "//absl/synchronization",
+        "//absl/time",
+        "//absl/types:any",
+    ],
+)

cpp/platform/impl/g3/CMakeLists.txt

@@ -0,0 +1,41 @@
+# 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.
+
+add_library(platform_impl_g3 STATIC)
+
+target_sources(platform_impl_g3
+  PRIVATE
+    "atomic_reference_impl.h"
+    "platform.cc"
+    "settable_future_impl.h"
+    "system_clock_impl.h"
+)
+
+target_include_directories(platform_impl_g3
+  PUBLIC
+    ${CMAKE_CURRENT_SOURCE_DIR}
+)
+
+target_link_libraries(platform_impl_g3
+  PUBLIC
+    "platform_types"
+    "platform_api"
+    "platform_impl_shared_atomic_boolean"
+    "platform_impl_shared_posix_condition_variable"
+    "platform_impl_shared_posix_lock"
+    "platform_port_string"
+    "absl::base"
+    "absl::synchronization"
+    "absl::time"
+)

cpp/platform/impl/g3/atomic_reference_impl.h

@@ -0,0 +1,52 @@
+// 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.
+
+#ifndef PLATFORM_IMPL_G3_ATOMIC_REFERENCE_IMPL_H_
+#define PLATFORM_IMPL_G3_ATOMIC_REFERENCE_IMPL_H_
+
+#include "platform/api/atomic_reference.h"
+#include "platform/ptr.h"
+#include "absl/synchronization/mutex.h"
+#include "absl/types/any.h"
+
+namespace location {
+namespace nearby {
+namespace platform {
+
+// Provide implementation for absl::any.
+class AtomicReferenceImpl : public AtomicReference<absl::any> {
+ public:
+  explicit AtomicReferenceImpl(absl::any initial_value)
+      : value_(std::move(initial_value)) {}
+  ~AtomicReferenceImpl() override = default;
+
+  absl::any get() override {
+    absl::MutexLock lock(&mutex_);
+    return value_;
+  }
+  void set(absl::any value) override {
+    absl::MutexLock lock(&mutex_);
+    value_ = std::move(value);
+  }
+
+ private:
+  absl::Mutex mutex_;
+  absl::any value_;
+};
+
+}  // namespace platform
+}  // namespace nearby
+}  // namespace location
+
+#endif  // PLATFORM_IMPL_G3_ATOMIC_REFERENCE_IMPL_H_

cpp/platform/impl/g3/platform.cc

@@ -0,0 +1,154 @@
+// 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 "platform/api/platform.h"
+
+#include <atomic>
+#include <memory>
+
+#include "platform/api/atomic_boolean.h"
+#include "platform/api/atomic_reference.h"
+#include "platform/api/ble.h"
+#include "platform/api/ble_v2.h"
+#include "platform/api/bluetooth_adapter.h"
+#include "platform/api/bluetooth_classic.h"
+#include "platform/api/condition_variable.h"
+#include "platform/api/count_down_latch.h"
+#include "platform/api/hash_utils.h"
+#include "platform/api/lock.h"
+#include "platform/api/scheduled_executor.h"
+#include "platform/api/server_sync.h"
+#include "platform/api/settable_future.h"
+#include "platform/api/submittable_executor.h"
+#include "platform/api/system_clock.h"
+#include "platform/api/thread_utils.h"
+#include "platform/api/webrtc.h"
+#include "platform/api/wifi.h"
+#include "platform/impl/g3/atomic_reference_impl.h"
+#include "platform/impl/g3/settable_future_impl.h"
+#include "platform/impl/g3/system_clock_impl.h"
+#include "platform/impl/shared/atomic_boolean_impl.h"
+#include "platform/impl/shared/posix_condition_variable.h"
+#include "platform/impl/shared/posix_lock.h"
+#include "platform/port/string.h"
+#include "platform/ptr.h"
+#include "absl/synchronization/mutex.h"
+#include "absl/time/time.h"
+
+namespace location {
+namespace nearby {
+namespace platform {
+
+Ptr<SubmittableExecutor> ImplementationPlatform::createSingleThreadExecutor() {
+  return Ptr<SubmittableExecutor>(/*new SingleThreadExecutorImpl()*/);
+}
+
+Ptr<SubmittableExecutor> ImplementationPlatform::createMultiThreadExecutor(
+    int max_concurrency) {
+  return Ptr<SubmittableExecutor>(/*new MultiThreadExecutorImpl()*/);
+}
+
+Ptr<ScheduledExecutor> ImplementationPlatform::createScheduledExecutor() {
+  return Ptr<ScheduledExecutor>(/*new ScheduledExecutorImpl()*/);
+}
+
+Ptr<AtomicReference<absl::any>>
+ImplementationPlatform::createAtomicReferenceAny(absl::any initial_value) {
+  return Ptr<AtomicReference<absl::any>>(
+      new AtomicReferenceImpl(initial_value));
+}
+
+Ptr<SettableFuture<absl::any>>
+ImplementationPlatform::createSettableFutureAny() {
+  return Ptr<SettableFuture<std::any>>(new SettableFutureImpl{});
+}
+
+Ptr<BluetoothAdapter> ImplementationPlatform::createBluetoothAdapter() {
+  return Ptr<BluetoothAdapter>{};
+}
+
+Ptr<WifiMedium> ImplementationPlatform::createWifiMedium() {
+  return Ptr<WifiMedium>();
+}
+
+Ptr<CountDownLatch> ImplementationPlatform::createCountDownLatch(
+    std::int32_t count) {
+  return Ptr<CountDownLatch>(/*new CountDownLatchImpl(count)*/);
+}
+
+Ptr<ThreadUtils> ImplementationPlatform::createThreadUtils() {
+  return Ptr<ThreadUtils>(/*new ThreadUtilsImpl()*/);
+}
+
+Ptr<SystemClock> ImplementationPlatform::createSystemClock() {
+  return Ptr<SystemClock>(new SystemClockImpl());
+}
+
+Ptr<AtomicBoolean> ImplementationPlatform::createAtomicBoolean(
+    bool initial_value) {
+  return Ptr<AtomicBoolean>(new AtomicBooleanImpl(initial_value));
+}
+
+Ptr<BluetoothClassicMedium>
+ImplementationPlatform::createBluetoothClassicMedium() {
+  return Ptr<BluetoothClassicMedium>();
+}
+
+Ptr<BLEMedium> ImplementationPlatform::createBLEMedium() {
+  return Ptr<BLEMedium>();
+}
+
+Ptr<BLEMediumV2> ImplementationPlatform::createBLEMediumV2() {
+  return Ptr<BLEMediumV2>();
+}
+
+Ptr<ServerSyncMedium> ImplementationPlatform::createServerSyncMedium() {
+  return Ptr<ServerSyncMedium>(/*new ServerSyncMediumImpl()*/);
+}
+
+Ptr<WifiLanMedium> ImplementationPlatform::createWifiLanMedium() {
+  return Ptr<WifiLanMedium>();
+}
+
+//Ptr<WebRtcSignalingMessenger>
+//ImplementationPlatform::createWebRtcSignalingMessenger(
+//    const std::string& self_id) {
+//  return Ptr<WebRtcSignalingMessenger>(/*new FCMSignalingMessenger()*/);
+//}
+
+Ptr<Lock> ImplementationPlatform::createLock() {
+  return Ptr<Lock>(new PosixLock());
+}
+
+Ptr<ConditionVariable> ImplementationPlatform::createConditionVariable(
+    Ptr<Lock> lock) {
+  return Ptr<ConditionVariable>(new PosixConditionVariable(lock));
+}
+
+Ptr<HashUtils> ImplementationPlatform::createHashUtils() {
+  return Ptr<HashUtils>(/*new HashUtilsImpl()*/);
+}
+
+std::string ImplementationPlatform::getDeviceId() {
+  // TODO(alexchau): Get deviceId from base
+  return "google3";
+}
+
+std::string ImplementationPlatform::getPayloadPath(int64_t payload_id) {
+  return "/tmp/" + std::to_string(payload_id);
+}
+
+}  // namespace platform
+}  // namespace nearby
+}  // namespace location

cpp/platform/impl/g3/settable_future_impl.h

@@ -0,0 +1,108 @@
+// 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.
+
+#ifndef PLATFORM_IMPL_G3_SETTABLE_FUTURE_IMPL_H_
+#define PLATFORM_IMPL_G3_SETTABLE_FUTURE_IMPL_H_
+
+#include <utility>
+
+#include "platform/api/platform.h"
+#include "platform/api/settable_future.h"
+#include "absl/synchronization/mutex.h"
+#include "absl/time/clock.h"
+#include "absl/types/any.h"
+
+namespace location {
+namespace nearby {
+namespace platform {
+
+class SettableFutureImpl : public SettableFuture<absl::any> {
+ public:
+  explicit SettableFutureImpl() = default;
+  ~SettableFutureImpl() override = default;
+
+  bool set(absl::any value) override {
+    absl::MutexLock lock(&mutex_);
+    if (!done_) {
+      value_ = std::move(value);
+      done_ = true;
+      exception_ = {Exception::kSuccess};
+      completed_.SignalAll();
+    }
+    return true;
+  }
+
+  bool setException(Exception exception) override {
+    absl::MutexLock lock(&mutex_);
+    return SetExceptionLocked(exception);
+  }
+
+  void addListener(Ptr<Runnable> runnable, Executor* executor) override {}
+
+  ExceptionOr<std::any> get() override {
+    absl::MutexLock lock(&mutex_);
+    while (!done_) {
+      completed_.Wait(&mutex_);
+    }
+    return exception_.value != Exception::kSuccess
+               ? ExceptionOr<std::any>{exception_.value}
+               : ExceptionOr<std::any>{value_};
+  }
+
+  ExceptionOr<std::any> get(std::int64_t timeout_ms) override {
+    absl::MutexLock lock(&mutex_);
+    absl::Duration timeout = absl::Milliseconds(timeout_ms);
+    while (!done_) {
+      absl::Time start_time = absl::Now();
+      if (completed_.WaitWithTimeout(&mutex_, timeout)) {
+        SetExceptionLocked({Exception::kTimeout});
+        break;
+      }
+      absl::Duration spent = absl::Now() - start_time;
+      if (spent < timeout) {
+        timeout -= spent;
+      } else if (!done_) {
+        SetExceptionLocked({Exception::kTimeout});
+        break;
+      }
+    }
+    return exception_.value != Exception::kSuccess
+               ? ExceptionOr<std::any>{exception_.value}
+               : ExceptionOr<std::any>{value_};
+  }
+
+ private:
+  bool SetExceptionLocked(Exception exception) {
+    if (!done_) {
+      exception_ = exception.value != Exception::kSuccess
+                       ? exception
+                       : Exception{Exception::kFailed};
+      done_ = true;
+      completed_.SignalAll();
+    }
+    return true;
+  }
+
+  absl::Mutex mutex_;
+  absl::CondVar completed_;
+  bool done_{false};
+  absl::any value_;
+  Exception exception_{Exception::kFailed};
+};
+
+}  // namespace platform
+}  // namespace nearby
+}  // namespace location
+
+#endif  // PLATFORM_IMPL_G3_SETTABLE_FUTURE_IMPL_H_

cpp/platform/impl/g3/system_clock_impl.h

@@ -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.
+
+#ifndef PLATFORM_IMPL_G3_SYSTEM_CLOCK_IMPL_H_
+#define PLATFORM_IMPL_G3_SYSTEM_CLOCK_IMPL_H_
+
+#include <cstdint>
+
+#include "platform/api/system_clock.h"
+#include "absl/time/clock.h"
+#include "absl/time/time.h"
+
+namespace location {
+namespace nearby {
+
+class SystemClockImpl : public SystemClock {
+ public:
+  std::int64_t elapsedRealtime() override {
+    return absl::ToUnixMillis(absl::Now());
+  }
+};
+
+}  // namespace nearby
+}  // namespace location
+
+#endif  // PLATFORM_IMPL_G3_SYSTEM_CLOCK_IMPL_H_