Classes

• class sys::recursive_spin_mutex

  Spin mutex that can be lock multiple times by the same thread.

  Date

  2018-05-21

• class sys::spin_mutex

  Fast mutex that does not use system calls.

  • Uses std::atomic_flag.

  Date

  2018-05-21

• class sys::file_mutex

  File-based mutex.

  • Uses the sanest (but not very portable) flock(2) system call for file locking.
  • Read locks may be acquired by multiple processes, provided that there no write lock on the file.
  • Write lock may be acquired by only one process.

  Date

  2018-05-21

  See

  flock(2)

• template <class Ch, class Tr = std::char_traits<Ch>>
class sys::basic_shmembuf

  Shared memory stream buffer with synchronisation via process_semaphore.

  Ch

  character type

  
  

  Tr

  character traits type

  
  

  • The class provides both std::streambuf and std::mutex interfaces.
  • Methods lock and unlock must be called in both parent and child process to syncrhonise buffer state updates.

  Date

  2018-05-21