profiling: Add SocketPool.
Change-Id: I3bda8969ee71df2d47eb6e7f306a530bc388af27
diff --git a/src/profiling/memory/client.h b/src/profiling/memory/client.h
new file mode 100644
index 0000000..a3aa5c6
--- /dev/null
+++ b/src/profiling/memory/client.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * 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
+ *
+ * http://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 SRC_PROFILING_MEMORY_CLIENT_H_
+#define SRC_PROFILING_MEMORY_CLIENT_H_
+
+#include <stddef.h>
+#include <mutex>
+#include <vector>
+
+#include "perfetto/base/scoped_file.h"
+
+namespace perfetto {
+
+class SocketPool;
+
+class BorrowedSocket {
+ public:
+ BorrowedSocket(const BorrowedSocket&) = delete;
+ BorrowedSocket& operator=(const BorrowedSocket&) = delete;
+ BorrowedSocket(BorrowedSocket&& other) {
+ fd_ = std::move(other.fd_);
+ socket_pool_ = other.socket_pool_;
+ other.socket_pool_ = nullptr;
+ }
+
+ BorrowedSocket(base::ScopedFile fd, SocketPool* socket_pool);
+ int operator*();
+ int get();
+ void Close();
+ ~BorrowedSocket();
+
+ private:
+ base::ScopedFile fd_;
+ SocketPool* socket_pool_ = nullptr;
+};
+
+class SocketPool {
+ public:
+ friend class BorrowedSocket;
+ SocketPool(std::vector<base::ScopedFile> sockets);
+
+ BorrowedSocket Borrow();
+
+ private:
+ void Return(base::ScopedFile fd);
+ std::mutex mtx_;
+ std::condition_variable cv_;
+ std::vector<base::ScopedFile> sockets_;
+ size_t available_sockets_;
+};
+
+} // namespace perfetto
+
+#endif // SRC_PROFILING_MEMORY_CLIENT_H_