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Name	Size	Mode	Actions
concurrent_queues/	-	0755	rm
csbl/	-	0755	rm
detail/	-	0755	rm
executors/	-	0755	rm
experimental/	-	0755	rm
futures/	-	0755	rm
pthread/	-	0755	rm
v2/	-	0755	rm
win32/	-	0755	rm
barrier.hpp	7421	0644	edit dl rm
caller_context.hpp	1526	0644	edit dl rm
completion_latch.hpp	6579	0644	edit dl rm
condition.hpp	490	0644	edit dl rm
condition_variable.hpp	634	0644	edit dl rm
cv_status.hpp	531	0644	edit dl rm
exceptional_ptr.hpp	1098	0644	edit dl rm
exceptions.hpp	6286	0644	edit dl rm
executor.hpp	476	0644	edit dl rm
externally_locked.hpp	10792	0644	edit dl rm
externally_locked_stream.hpp	4784	0644	edit dl rm
future.hpp	203792	0644	edit dl rm
interruption.hpp	596	0644	edit dl rm
is_locked_by_this_thread.hpp	1062	0644	edit dl rm
latch.hpp	4967	0644	edit dl rm
lockable_adapter.hpp	6043	0644	edit dl rm
lockable_concepts.hpp	4114	0644	edit dl rm
lockable_traits.hpp	7853	0644	edit dl rm
locks.hpp	572	0644	edit dl rm
lock_algorithms.hpp	13201	0644	edit dl rm
lock_concepts.hpp	4792	0644	edit dl rm
lock_factories.hpp	2317	0644	edit dl rm
lock_guard.hpp	2290	0644	edit dl rm
lock_options.hpp	701	0644	edit dl rm
lock_traits.hpp	1234	0644	edit dl rm
lock_types.hpp	34418	0644	edit dl rm
mutex.hpp	1166	0644	edit dl rm
null_mutex.hpp	6346	0644	edit dl rm
once.hpp	1324	0644	edit dl rm
ostream_buffer.hpp	925	0644	edit dl rm
poly_lockable.hpp	2100	0644	edit dl rm
poly_lockable_adapter.hpp	2124	0644	edit dl rm
poly_shared_lockable.hpp	5807	0644	edit dl rm
poly_shared_lockable_adapter.hpp	4792	0644	edit dl rm
recursive_mutex.hpp	1535	0644	edit dl rm
reverse_lock.hpp	1316	0644	edit dl rm
scoped_thread.hpp	8547	0644	edit dl rm
shared_lock_guard.hpp	1192	0644	edit dl rm
shared_mutex.hpp	1400	0644	edit dl rm
strict_lock.hpp	6246	0644	edit dl rm
synchronized_value.hpp	31110	0644	edit dl rm
sync_bounded_queue.hpp	595	0644	edit dl rm
sync_queue.hpp	571	0644	edit dl rm
testable_mutex.hpp	3925	0644	edit dl rm
thread.hpp	385	0644	edit dl rm
thread_functors.hpp	1366	0644	edit dl rm
thread_guard.hpp	1069	0644	edit dl rm
thread_only.hpp	803	0644	edit dl rm
thread_pool.hpp	531	0644	edit dl rm
thread_time.hpp	1590	0644	edit dl rm
tss.hpp	2603	0644	edit dl rm
user_scheduler.hpp	5222	0644	edit dl rm
with_lock_guard.hpp	6052	0644	edit dl rm
xtime.hpp	2390	0644	edit dl rm

Edit: /usr/include/boost/thread/null_mutex.hpp (6346B)

//////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Vicente J. Botet Escriba 2008-2009,2012. Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// See http://www.boost.org/libs/thread for documentation.
//
//////////////////////////////////////////////////////////////////////////////

#ifndef BOOST_THREAD_NULL_MUTEX_HPP
#define BOOST_THREAD_NULL_MUTEX_HPP

#include <boost/thread/detail/config.hpp>
#include <boost/thread/detail/delete.hpp>
#include <boost/chrono/chrono.hpp>

/// \file
/// Describes null_mutex class

namespace boost
{

/// Implements a mutex that simulates a mutex without doing any operation and
  /// simulates a successful operation.
  class null_mutex
  {
  public:

BOOST_THREAD_NO_COPYABLE( null_mutex) /*< no copyable >*/

null_mutex() {}

/// Simulates a mutex lock() operation. Empty function.
    void lock()
    {
    }

/// Simulates a mutex try_lock() operation.
    /// Equivalent to "return true;"
    bool try_lock()
    {
      return true;
    }

/// Simulates a mutex unlock() operation.
    /// Empty function.
    void unlock()
    {
    }

#ifdef BOOST_THREAD_USES_CHRONO
    /// Simulates a mutex try_lock_until() operation.
    /// Equivalent to "return true;"
    template <typename Clock, typename Duration>
    bool try_lock_until(chrono::time_point<Clock, Duration> const &)
    {
      return true;
    }

/// Simulates a mutex try_lock_for() operation.
    /// Equivalent to "return true;"
    template <typename Rep, typename Period>
    bool try_lock_for(chrono::duration<Rep, Period> const &)
    {
      return true;
    }
#endif

/// Simulates a mutex lock_shared() operation.
    /// Empty function.
    void lock_shared()
    {
    }

/// Simulates a mutex try_lock_shared() operation.
    /// Equivalent to "return true;"
    bool try_lock_shared()
    {
      return true;
    }

/// Simulates a mutex unlock_shared() operation.
    /// Empty function.
    void unlock_shared()
    {
    }

/// Simulates a mutex try_lock_shared_until() operation.
    /// Equivalent to "return true;"
    template <typename Clock, typename Duration>
    bool try_lock_shared_until(chrono::time_point<Clock, Duration> const &)
    {
      return true;
    }
    /// Simulates a mutex try_lock_shared_for() operation.
    /// Equivalent to "return true;"
    template <typename Rep, typename Period>
    bool try_lock_shared_for(chrono::duration<Rep, Period> const &)
    {
      return true;
    }

/// Simulates a mutex lock_upgrade() operation.
    /// Empty function.
    void lock_upgrade()
    {
    }

/// Simulates a mutex try_lock_upgrade() operation.
    /// Equivalent to "return true;"
    bool try_lock_upgrade()
    {
      return true;
    }

/// Simulates a mutex unlock_upgrade() operation.
    /// Empty function.
    void unlock_upgrade()
    {
    }

/// Simulates a mutex try_lock_upgrade_until() operation.
    /// Equivalent to "return true;"
    template <typename Clock, typename Duration>
    bool try_lock_upgrade_until(chrono::time_point<Clock, Duration> const &)
    {
      return true;
    }

/// Simulates a mutex try_lock_upgrade_for() operation.
    /// Equivalent to "return true;"
    template <typename Rep, typename Period>
    bool try_lock_upgrade_for(chrono::duration<Rep, Period> const &)
    {
      return true;
    }

/// Simulates a mutex try_unlock_shared_and_lock() operation.
    /// Equivalent to "return true;"
    bool try_unlock_shared_and_lock()
    {
      return true;
    }

#ifdef BOOST_THREAD_USES_CHRONO
    /// Simulates a mutex try_unlock_shared_and_lock_until() operation.
    /// Equivalent to "return true;"
    template <typename Clock, typename Duration>
    bool try_unlock_shared_and_lock_until(chrono::time_point<Clock, Duration> const &)
    {
      return true;
    }

/// Simulates a mutex try_unlock_shared_and_lock_for() operation.
    /// Equivalent to "return true;"
    template <typename Rep, typename Period>
    bool try_unlock_shared_and_lock_for(chrono::duration<Rep, Period> const &)
    {
      return true;
    }
#endif

/// Simulates unlock_and_lock_shared().
    /// Empty function.
    void unlock_and_lock_shared()
    {
    }

/// Simulates a mutex try_unlock_shared_and_lock_upgrade() operation.
    /// Equivalent to "return true;"
    bool try_unlock_shared_and_lock_upgrade()
    {
      return true;
    }

#ifdef BOOST_THREAD_USES_CHRONO
    /// Simulates a mutex try_unlock_shared_and_lock_upgrade_until() operation.
    /// Equivalent to "return true;"
    template <typename Clock, typename Duration>
    bool try_unlock_shared_and_lock_upgrade_until(chrono::time_point<Clock, Duration> const &)
    {
      return true;
    }

/// Simulates a mutex try_unlock_shared_and_lock_upgrade_for() operation.
    /// Equivalent to "return true;"
    template <typename Rep, typename Period>
    bool try_unlock_shared_and_lock_upgrade_for(chrono::duration<Rep, Period> const &)
    {
      return true;
    }
#endif

/// Simulates unlock_and_lock_upgrade().
    /// Empty function.
    void unlock_and_lock_upgrade()
    {
    }

/// Simulates unlock_upgrade_and_lock().
    /// Empty function.
    void unlock_upgrade_and_lock()
    {
    }

/// Simulates a mutex try_unlock_upgrade_and_lock() operation.
    /// Equivalent to "return true;"
    bool try_unlock_upgrade_and_lock()
    {
      return true;
    }

#ifdef BOOST_THREAD_USES_CHRONO
    /// Simulates a mutex try_unlock_upgrade_and_lock_until() operation.
    /// Equivalent to "return true;"
    template <typename Clock, typename Duration>
    bool try_unlock_upgrade_and_lock_until(chrono::time_point<Clock, Duration> const &)
    {
      return true;
    }

/// Simulates a mutex try_unlock_upgrade_and_lock_for() operation.
    /// Equivalent to "return true;"
    template <typename Rep, typename Period>
    bool try_unlock_upgrade_and_lock_for(chrono::duration<Rep, Period> const &)
    {
      return true;
    }
#endif

/// Simulates unlock_upgrade_and_lock_shared().
    /// Empty function.
    void unlock_upgrade_and_lock_shared()
    {
    }

};

} //namespace boost {

#endif

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