From 2d48ae784ea6828e8626c32c848f64232d8f35c0 Mon Sep 17 00:00:00 2001
From: geronimo <geronimo013@gmx.de>
Date: Fri, 13 Jul 2012 04:26:40 +0200
Subject: initial import

---
 libs/vdr/include/Thread.h | 101 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 libs/vdr/include/Thread.h

(limited to 'libs/vdr/include/Thread.h')

diff --git a/libs/vdr/include/Thread.h b/libs/vdr/include/Thread.h
new file mode 100644
index 0000000..ce8c999
--- /dev/null
+++ b/libs/vdr/include/Thread.h
@@ -0,0 +1,101 @@
+/**
+ * File:      Thread.h
+ * Project:   libvdr - classes taken from vdr-project
+ * 
+ * from "Video Disk Recorder":
+ * 
+ * Copyright (C) 2000, 2003, 2006, 2008 Klaus Schmidinger
+ * 
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ * Or, point your browser to http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * 
+ * The original author can be reached at kls@tvdr.de
+ * 
+ * The vdr project's page is at http://www.tvdr.de
+ * 
+ * ++2012-07-04(rma):
+ * As I don't like the necessity to subclass what should work in a thread,
+ * I extended the original sources, so that an arbitrary function can be
+ * a thread kernel.
+ */
+#ifndef THREAD_H
+#define	THREAD_H
+
+#include <Mutex.h>
+#include <stddef.h>
+#include <pthread.h>
+typedef pid_t tThreadId;
+
+class cThread {
+public:
+  cThread(const char *Description = NULL);
+       ///< Creates a new thread.
+       ///< If Description is present, a log file entry will be made when
+       ///< the thread starts and stops. The Start() function must be called
+       ///< to actually start the thread.
+  cThread(int (*ThreadCallback)(void *opaque, cThread *instance), void *opaque, const char *Description = NULL);
+  virtual ~cThread();
+
+  void SetDescription(const char *Description, ...) __attribute__ ((format (printf, 2, 3)));
+  bool Start(void);
+       ///< Actually starts the thread.
+       ///< If the thread is already running, nothing happens.
+  virtual void Cancel(int WaitSeconds = 0);
+       ///< Cancels the thread by first setting 'running' to false, so that
+       ///< the Action() loop can finish in an orderly fashion and then waiting
+       ///< up to WaitSeconds seconds for the thread to actually end. If the
+       ///< thread doesn't end by itself, it is killed.
+       ///< If WaitSeconds is -1, only 'running' is set to false and Cancel()
+       ///< returns immediately, without killing the thread.
+  bool Active(void);
+       ///< used from outside to check whether the thread is still alive.
+  bool Running(void) { return running; }
+       ///< used from inside the thread to check whether it may keep on running.
+       ///< Returns false if a derived cThread object shall leave its Action()
+       ///< function. Should be public and so available for callback thread kernels
+
+  static tThreadId ThreadId(void);
+  static tThreadId IsMainThread(void) { return ThreadId() == mainThreadId; }
+  static void SetMainThreadId(void);
+
+protected:
+  void SetPriority(int Priority);
+  void SetIOPriority(int Priority);
+  void Lock(void) { mutex.Lock(); }
+  void Unlock(void) { mutex.Unlock(); }
+  virtual void Action(void);
+       ///< A derived cThread class must implement the code it wants to
+       ///< execute as a separate thread in this function. If this is
+       ///< a loop, it must check Running() repeatedly to see whether
+       ///< it's time to stop.
+       ///< To support callbacks as thread kernels, default implementation now
+       ///< starts the callback
+
+private:
+  bool active;
+  bool running;
+  pthread_t childTid;
+  tThreadId childThreadId;
+  cMutex mutex;
+  char *description;
+  int (*threadCallback)(void *, cThread *);
+  void *opaque;
+  static tThreadId mainThreadId;
+  static void *StartThread(cThread *Thread);
+  friend class cThreadLock;
+  };
+
+#endif	/* THREAD_H */
+
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