Libraries: Move to Userland/Libraries/

Userland/Libraries/LibThread/Thread.h

@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <AK/DistinctNumeric.h>
+#include <AK/Function.h>
+#include <AK/Result.h>
+#include <AK/String.h>
+#include <LibCore/Object.h>
+#include <pthread.h>
+
+namespace LibThread {
+
+TYPEDEF_DISTINCT_ORDERED_ID(int, ThreadError);
+
+class Thread final : public Core::Object {
+    C_OBJECT(Thread);
+
+public:
+    virtual ~Thread();
+
+    void start();
+
+    template<typename T = void>
+    Result<T, ThreadError> join();
+
+    String thread_name() const { return m_thread_name; }
+    pthread_t tid() const { return m_tid; }
+
+private:
+    explicit Thread(Function<int()> action, StringView thread_name = nullptr);
+    Function<int()> m_action;
+    pthread_t m_tid { 0 };
+    String m_thread_name;
+};
+
+template<typename T>
+Result<T, ThreadError> Thread::join()
+{
+    void* thread_return = nullptr;
+    int rc = pthread_join(m_tid, &thread_return);
+    if (rc != 0) {
+        return ThreadError { rc };
+    }
+
+    m_tid = 0;
+    if constexpr (IsVoid<T>::value)
+        return {};
+    else
+        return { static_cast<T>(thread_return) };
+}
+
+}