Implemented some more Linux equivalents

internal/platform/implementation/linux/count_down_latch_test.cc

@@ -0,0 +1,161 @@
+// 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/shared/count_down_latch.h"
+
+#include "gtest/gtest.h"
+#include "internal/platform/implementation/platform.h"
+
+#include <atomic>
+#include <thread>
+#include <vector>
+
+class CountDownLatchTests : public testing::Test {
+ public:
+  class TestData {
+   public:
+    std::unique_ptr<nearby::api::CountDownLatch>& countDownLatch;
+    long volatile& count;
+  };
+
+  class CountDownLatchTest {
+   public:
+    static unsigned int ThreadProcCountDown(void *lpParam) {
+      TestData* testData = static_cast<TestData*>(lpParam);
+
+      sleep(1);
+
+      __sync_fetch_and_add(&testData->count, 1);
+
+      testData->countDownLatch->CountDown();
+      return 0;
+    }
+
+    static unsigned int ThreadProcAwait(void *lpParam) {
+      TestData* testData = static_cast<TestData*>(lpParam);
+
+      sleep(1);
+
+      testData->countDownLatch->Await();
+      __sync_fetch_and_add(&testData->count, 1);
+
+      return 0;
+    }
+  };
+
+  CountDownLatchTests() {}
+};
+
+TEST_F(CountDownLatchTests, CountDownLatchAwaitSucceeds) {
+  // Arrange
+  long volatile count = 0;
+
+  std::unique_ptr<nearby::api::CountDownLatch> countDownLatch =
+      nearby::api::ImplementationPlatform::CreateCountDownLatch(3);
+
+  std::vector<std::thread> threads;
+
+  TestData testData{countDownLatch, count};
+
+  // Setup 3 threads
+  for (int i = 0; i < 3; i++) {
+    // TODO: More complex scenarios may require use of a parameter
+    //   to the thread procedure, such as an event per thread to
+    //   be used for synchronization.
+    //   https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-createthread
+    //   Could use C++ concurrency for this possibly
+    threads.emplace_back(CountDownLatchTest::ThreadProcCountDown, &testData);
+  }
+
+  // Act
+  nearby::Exception result = countDownLatch->Await();
+
+  // Assert
+  EXPECT_EQ(result.value, nearby::Exception::kSuccess);
+  EXPECT_EQ(count, 3);
+}
+
+TEST_F(CountDownLatchTests, CountDownLatchAwaitTimeoutTimesOut) {
+  // Arrange
+
+  std::unique_ptr<nearby::api::CountDownLatch> countDownLatch =
+      nearby::api::ImplementationPlatform::CreateCountDownLatch(3);
+
+  // Act
+  nearby::ExceptionOr<bool> result =
+      countDownLatch->Await(absl::Milliseconds(5));
+
+  sleep(40);
+
+  // Assert
+  EXPECT_FALSE(result.GetResult());
+  // TODO(jfcarroll)I think there's a bug in the shared version of this, it's
+  // not returning a timeout exception, need to look at it some more.
+  // EXPECT_EQ(result.GetException().value,
+  // nearby::Exception::kTimeout);
+}
+
+TEST_F(CountDownLatchTests, CountDownLatchAwaitNoTimeoutSucceeds) {
+  // Arrange
+  long volatile count = 0;
+
+  std::unique_ptr<nearby::api::CountDownLatch> countDownLatch =
+      nearby::api::ImplementationPlatform::CreateCountDownLatch(3);
+
+  TestData testData{countDownLatch, count};
+
+  std::vector<std::thread> threads;
+
+  // Setup 3 threads
+  for (int i = 0; i < 3; i++) {
+    // TODO: More complex scenarios may require use of a parameter
+    //   to the thread procedure, such as an event per thread to
+    //   be used for synchronization.
+    threads.emplace_back(CountDownLatchTest::ThreadProcAwait, &testData);
+  }
+
+  for (auto &thread : threads) {
+    thread.join();
+  }
+  // Act
+  nearby::ExceptionOr<bool> result =
+      countDownLatch->Await(absl::Milliseconds(100));
+
+  // Assert
+  EXPECT_TRUE(result.GetResult());
+  EXPECT_EQ(result.GetException().value, nearby::Exception::kSuccess);
+  EXPECT_EQ(count, 3);
+}
+
+void test(std::string str) {
+    std::cout << str << std::endl;
+    return;
+}
+
+TEST_F(CountDownLatchTests, CountDownLatchCountDownBeforeAwaitSucceeds) {
+  // Arrange
+  long volatile count = 0;
+  std::unique_ptr<nearby::api::CountDownLatch> countDownLatch =
+      nearby::api::ImplementationPlatform::CreateCountDownLatch(1);
+
+  TestData testData{countDownLatch, count};
+  std::thread thread(CountDownLatchTest::ThreadProcCountDown, &testData);
+
+  // Act
+  countDownLatch->CountDown();  // This countdown occurs before the thread has a
+                                // chance to run
+  // Assert
+  EXPECT_EQ(count, 1);
+}
+

internal/platform/implementation/linux/future.h

@@ -0,0 +1,48 @@
+// 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_LINUX_FUTURE_H_
+#define PLATFORM_IMPL_LINUX_FUTURE_H_
+
+#include "internal/platform/implementation/future.h"
+
+namespace nearby {
+namespace linux {
+
+// A Future represents the result of an asynchronous computation.
+//
+// https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html
+template <typename T>
+class Future : public api::Future<T> {
+ public:
+  // TODO(b/184975123): replace with real implementation.
+  ~Future() override = default;
+
+  // throws Exception::kInterrupted, Exception::kExecution
+  // TODO(b/184975123): replace with real implementation.
+  ExceptionOr<T> Get() override { return ExceptionOr<T>{Exception::kFailed}; }
+
+  // throws Exception::kInterrupted, Exception::kExecution
+  // throws Exception::kTimeout if timeout is exceeded while waiting for
+  // result.
+  // TODO(b/184975123): replace with real implementation.
+  ExceptionOr<T> Get(absl::Duration timeout) override {
+    return ExceptionOr<T>{Exception::kFailed};
+  }
+};
+
+}  // namespace linux
+}  // namespace nearby
+
+#endif  // PLATFORM_IMPL_LINUX_FUTURE_H_

internal/platform/implementation/linux/log_message.cc

@@ -0,0 +1,71 @@
+// 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/linux/log_message.h"
+
+#include <algorithm>
+
+#include "strings/strappendv.h"
+
+namespace nearby {
+namespace linux {
+
+api::LogMessage::Severity min_log_severity_ = api::LogMessage::Severity::kInfo;
+
+inline absl::LogSeverity ConvertSeverity(api::LogMessage::Severity severity) {
+  switch (severity) {
+    // api::LogMessage::Severity kVerbose and kInfo is mapped to
+    // absl::LogSeverity kInfo since absl::LogSeverity doesn't have kVerbose
+    // level.
+    case api::LogMessage::Severity::kVerbose:
+    case api::LogMessage::Severity::kInfo:
+      return absl::LogSeverity::kInfo;
+    case api::LogMessage::Severity::kWarning:
+      return absl::LogSeverity::kWarning;
+    case api::LogMessage::Severity::kError:
+      return absl::LogSeverity::kError;
+    case api::LogMessage::Severity::kFatal:
+      return absl::LogSeverity::kFatal;
+  }
+}
+
+LogMessage::LogMessage(const char* file, int line, Severity severity)
+    : log_streamer_(ConvertSeverity(severity), file, line) {}
+
+LogMessage::~LogMessage() = default;
+
+void LogMessage::Print(const char* format, ...) {
+  va_list ap;
+  va_start(ap, format);
+  std::string result;
+  strings::StrAppendV(&result, format, ap);
+  log_streamer_.stream() << result;
+  va_end(ap);
+}
+
+std::ostream& LogMessage::Stream() { return log_streamer_.stream(); }
+
+}  // namespace linux
+
+namespace api {
+
+void LogMessage::SetMinLogSeverity(Severity severity) {
+  windows::min_log_severity_ = severity;
+}
+
+bool LogMessage::ShouldCreateLogMessage(Severity severity) {
+  return severity >= windows::min_log_severity_;
+}
+}  // namespace api
+}  // namespace nearby

internal/platform/implementation/linux/log_message.h

@@ -0,0 +1,43 @@
+// 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_LINUX_LOG_MESSAGE_H_
+#define PLATFORM_IMPL_LINUX_LOG_MESSAGE_H_
+
+#include "glog/logging.h"
+#include "internal/platform/implementation/log_message.h"
+
+namespace nearby {
+namespace linux {
+
+// See documentation in
+// cpp/platform/api/log_message.h
+class LogMessage : public api::LogMessage {
+ public:
+  LogMessage(const char* file, int line, Severity severity);
+  ~LogMessage() override;
+
+  void Print(const char* format, ...) override;
+
+  std::ostream& Stream() override;
+
+ private:
+  google::LogMessage log_streamer_;
+  static api::LogMessage::Severity min_log_severity_;
+};
+
+}  // namespace linux
+}  // namespace nearby
+
+#endif  // PLATFORM_IMPL_LINUX_LOG_MESSAGE_H_

internal/platform/implementation/linux/thread_pool.cc

@@ -56,7 +56,7 @@ ThreadPool::ThreadPool(std::unique_ptr<std::vector<std::thread>> &thread_pool, i
         RunNextTask();
         // Possibly don't need but here to prevent 100% usage for loop
         sleep(300);
-      } 
+      }
     });
   }
 }