Added HandlerSocket plugin

- Fixed compiler errors
- Modified Makefiles to be part of plugin directory
- Some minor changes in database.cpp to use the new MariaDB handler interface

plugin/handler_socket/libhsclient/thread.hpp

@@ -0,0 +1,84 @@
+
+// vim:sw=2:ai
+
+/*
+ * Copyright (C) 2010 DeNA Co.,Ltd.. All rights reserved.
+ * See COPYRIGHT.txt for details.
+ */
+
+#ifndef DENA_THREAD_HPP
+#define DENA_THREAD_HPP
+
+#include <stdexcept>
+#include <pthread.h>
+
+#include "fatal.hpp"
+
+namespace dena {
+
+template <typename T>
+struct thread : private noncopyable {
+  template <typename Ta> thread(const Ta& arg, size_t stack_sz = 256 * 1024)
+    : obj(arg), thr(0), need_join(false), stack_size(stack_sz) { }
+  template <typename Ta0, typename Ta1> thread(const Ta0& a0,
+    volatile Ta1& a1, size_t stack_sz = 256 * 1024)
+    : obj(a0, a1), thr(0), need_join(false), stack_size(stack_sz) { }
+  ~thread() {
+    join();
+  }
+  void start() {
+    if (!start_nothrow()) {
+      fatal_abort("thread::start");
+    }
+  }
+  bool start_nothrow() {
+    if (need_join) {
+      return need_join; /* true */
+    }
+    void *const arg = this;
+    pthread_attr_t attr;
+    if (pthread_attr_init(&attr) != 0) {
+      fatal_abort("pthread_attr_init");
+    }
+    if (pthread_attr_setstacksize(&attr, stack_size) != 0) {
+      fatal_abort("pthread_attr_setstacksize");
+    }
+    const int r = pthread_create(&thr, &attr, thread_main, arg);
+    if (pthread_attr_destroy(&attr) != 0) {
+      fatal_abort("pthread_attr_destroy");
+    }
+    if (r != 0) {
+      return need_join; /* false */
+    }
+    need_join = true;
+    return need_join; /* true */
+  }
+  void join() {
+    if (!need_join) {
+      return;
+    }
+    int e = 0;
+    if ((e = pthread_join(thr, 0)) != 0) {
+      fatal_abort("pthread_join");
+    }
+    need_join = false;
+  }
+  T& operator *() { return obj; }
+  T *operator ->() { return &obj; }
+ private:
+  static void *thread_main(void *arg) {
+    thread *p = static_cast<thread *>(arg);
+    p->obj();
+    return 0;
+  }
+ private:
+  T obj;
+  pthread_t thr;
+  bool need_join;
+  size_t stack_size;
+};
+
+};
+
+#endif
+