ceph/src/boost/boost/fiber/recursive_mutex.hpp

   1
   2 //          Copyright Oliver Kowalke 2013.
   3 // Distributed under the Boost Software License, Version 1.0.
   4 //    (See accompanying file LICENSE_1_0.txt or copy at
   5 //          http://www.boost.org/LICENSE_1_0.txt)
   6 //
   7 //  based on boost::interprocess::sync::interprocess_spinlock
   8
   9 #ifndef BOOST_FIBERS_RECURSIVE_MUTEX_H
  10 #define BOOST_FIBERS_RECURSIVE_MUTEX_H
  11
  12 #include <cstddef>
  13
  14 #include <boost/config.hpp>
  15
  16 #include <boost/assert.hpp>
  17
  18 #include <boost/fiber/context.hpp>
  19 #include <boost/fiber/detail/config.hpp>
  20 #include <boost/fiber/detail/spinlock.hpp>
  21
  22 #ifdef BOOST_HAS_ABI_HEADERS
  23 #  include BOOST_ABI_PREFIX
  24 #endif
  25
  26 #ifdef _MSC_VER
  27 # pragma warning(push)
  28 # pragma warning(disable:4251)
  29 #endif
  30
  31 namespace boost {
  32 namespace fibers {
  33
  34 class condition_variable;
  35
  36 class BOOST_FIBERS_DECL recursive_mutex {
  37 private:
  38     friend class condition_variable;
  39
  40     typedef context::wait_queue_t   wait_queue_type;
  41
  42     detail::spinlock            wait_queue_splk_{};
  43     wait_queue_type             wait_queue_{};
  44     context                 *   owner_{ nullptr };
  45     std::size_t                 count_{ 0 };
  46
  47 public:
  48     recursive_mutex() = default;
  49
  50     ~recursive_mutex() {
  51         BOOST_ASSERT( nullptr == owner_);
  52         BOOST_ASSERT( 0 == count_);
  53         BOOST_ASSERT( wait_queue_.empty() );
  54     }
  55
  56     recursive_mutex( recursive_mutex const&) = delete;
  57     recursive_mutex & operator=( recursive_mutex const&) = delete;
  58
  59     void lock();
  60
  61     bool try_lock() noexcept;
  62
  63     void unlock();
  64 };
  65
  66 }}
  67
  68 #ifdef _MSC_VER
  69 # pragma warning(pop)
  70 #endif
  71
  72 #ifdef BOOST_HAS_ABI_HEADERS
  73 #  include BOOST_ABI_SUFFIX
  74 #endif
  75
  76 #endif // BOOST_FIBERS_RECURSIVE_MUTEX_H