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posix_mutex.hpp 1.5KB

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  1. //
  2. // detail/posix_mutex.hpp
  3. // ~~~~~~~~~~~~~~~~~~~~~~
  4. //
  5. // Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com)
  6. //
  7. // Distributed under the Boost Software License, Version 1.0. (See accompanying
  8. // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  9. //
  10. #ifndef ASIO_DETAIL_POSIX_MUTEX_HPP
  11. #define ASIO_DETAIL_POSIX_MUTEX_HPP
  12. #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  13. # pragma once
  14. #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  15. #include "asio/detail/config.hpp"
  16. #if defined(ASIO_HAS_PTHREADS)
  17. #include <pthread.h>
  18. #include "asio/detail/noncopyable.hpp"
  19. #include "asio/detail/scoped_lock.hpp"
  20. #include "asio/detail/push_options.hpp"
  21. namespace asio {
  22. namespace detail {
  23. class posix_event;
  24. class posix_mutex
  25. : private noncopyable
  26. {
  27. public:
  28. typedef asio::detail::scoped_lock<posix_mutex> scoped_lock;
  29. // Constructor.
  30. ASIO_DECL posix_mutex();
  31. // Destructor.
  32. ~posix_mutex()
  33. {
  34. ::pthread_mutex_destroy(&mutex_); // Ignore EBUSY.
  35. }
  36. // Lock the mutex.
  37. void lock()
  38. {
  39. (void)::pthread_mutex_lock(&mutex_); // Ignore EINVAL.
  40. }
  41. // Unlock the mutex.
  42. void unlock()
  43. {
  44. (void)::pthread_mutex_unlock(&mutex_); // Ignore EINVAL.
  45. }
  46. private:
  47. friend class posix_event;
  48. ::pthread_mutex_t mutex_;
  49. };
  50. } // namespace detail
  51. } // namespace asio
  52. #include "asio/detail/pop_options.hpp"
  53. #if defined(ASIO_HEADER_ONLY)
  54. # include "asio/detail/impl/posix_mutex.ipp"
  55. #endif // defined(ASIO_HEADER_ONLY)
  56. #endif // defined(ASIO_HAS_PTHREADS)
  57. #endif // ASIO_DETAIL_POSIX_MUTEX_HPP