text: /*
   * OXT - OS eXtensions for boosT
   * Provides important functionality necessary for writing robust server software.
   *
   * Copyright (c) 2012 Phusion
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   */
  #ifndef _OXT_DETAIL_CONTEXT_HPP_
  #define _OXT_DETAIL_CONTEXT_HPP_
  
  #include <boost/thread/mutex.hpp>
  #include <boost/shared_ptr.hpp>
  #include <list>
  #include <vector>
  #include <string>
  #include <pthread.h>
  #ifdef __linux__
  	#include <sys/types.h>
  #endif
  #include "../spin_lock.hpp"
  
  namespace oxt {
  
  
  struct thread_local_context;
  
  typedef boost::shared_ptr<thread_local_context> thread_local_context_ptr;
  
  struct global_context_t {
  	boost::mutex next_thread_number_mutex;
  	/** Thread numbering begins at 2. The main thread has number 1.
  	 * A thread number of 0 is invalid. */
  	unsigned int next_thread_number;
  
  	boost::mutex thread_registration_mutex;
  	std::list<thread_local_context_ptr> registered_threads;
  
  	global_context_t();
  };
  
  struct thread_local_context {
  	std::list<thread_local_context_ptr>::iterator iterator;
  
  	pthread_t thread;
  	#ifdef __linux__
  		pid_t tid;
  	#endif
  	unsigned int thread_number;
  	std::string thread_name;
  
  	/** This lock is normally locked, but only unlocked during an oxt::sycall function,
  	 * and is relocked when that function returns. One can use try_lock to find out
  	 * whether the code is inside an oxt::syscall function.
  	 */
  	spin_lock syscall_interruption_lock;
  
  	#ifdef OXT_BACKTRACE_IS_ENABLED
  		std::vector<trace_point *> backtrace_list;
  		spin_lock backtrace_lock;
  	#endif
  	
  	static thread_local_context_ptr make_shared_ptr();
  
  	thread_local_context();
  };
  
  
  thread_local_context *get_thread_local_context();
  
  
  } // namespace oxt
  
  #endif /* _OXT_DETAIL_CONTEXT_HPP_ */
  