Panda3D

threadPosixImpl.h

00001 // Filename: threadPosixImpl.h
00002 // Created by:  drose (09Feb06)
00003 //
00004 ////////////////////////////////////////////////////////////////////
00005 //
00006 // PANDA 3D SOFTWARE
00007 // Copyright (c) Carnegie Mellon University.  All rights reserved.
00008 //
00009 // All use of this software is subject to the terms of the revised BSD
00010 // license.  You should have received a copy of this license along
00011 // with this source code in a file named "LICENSE."
00012 //
00013 ////////////////////////////////////////////////////////////////////
00014 
00015 #ifndef THREADPOSIXIMPL_H
00016 #define THREADPOSIXIMPL_H
00017 
00018 #include "pandabase.h"
00019 #include "selectThreadImpl.h"
00020 
00021 #ifdef THREAD_POSIX_IMPL
00022 
00023 #include "pnotify.h"
00024 #include "threadPriority.h"
00025 #include "mutexPosixImpl.h"
00026 
00027 #include <pthread.h>
00028 
00029 class Thread;
00030 
00031 ////////////////////////////////////////////////////////////////////
00032 //       Class : ThreadPosixImpl
00033 // Description : Uses Posix threads to implement a thread.
00034 ////////////////////////////////////////////////////////////////////
00035 class EXPCL_PANDA_PIPELINE ThreadPosixImpl {
00036 public:
00037   INLINE ThreadPosixImpl(Thread *parent_obj);
00038   ~ThreadPosixImpl();
00039 
00040   void setup_main_thread();
00041   bool start(ThreadPriority priority, bool joinable);
00042   void join();
00043   INLINE void preempt();
00044 
00045   string get_unique_id() const;
00046 
00047   INLINE static void prepare_for_exit();
00048 
00049   INLINE static Thread *get_current_thread();
00050   INLINE static void bind_thread(Thread *thread);
00051   INLINE static bool is_threading_supported();
00052   INLINE static bool is_true_threads();
00053   INLINE static bool is_simple_threads();
00054   INLINE static void sleep(double seconds);
00055   INLINE static void yield();
00056   INLINE static void consider_yield();
00057 
00058 private:
00059   static void *root_func(void *data);
00060   static void init_pt_ptr_index();
00061 
00062   // There appears to be a name collision with the word "Status".
00063   enum PStatus {
00064     S_new,
00065     S_start_called,
00066     S_running,
00067     S_finished,
00068   };
00069 
00070   MutexPosixImpl _mutex;
00071   Thread *_parent_obj;
00072   pthread_t _thread;
00073   bool _joinable;
00074   bool _detached;
00075   PStatus _status;
00076 
00077   static pthread_key_t _pt_ptr_index;
00078   static bool _got_pt_ptr_index;
00079 };
00080 
00081 #include "threadPosixImpl.I"
00082 
00083 #endif  // THREAD_POSIX_IMPL
00084 
00085 #endif
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