Instantiation of basic_shmembuf for char.

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.

Base classes

• public sys::basic_packetbuf< Ch, std::char_traits< Ch > >

Types

• using sem_type = process_semaphore

  Semaphore type. An alias to process_semaphore.

• using size_type = shared_mem_type::size_type

  Size type.

• using shared_mem_type = ::sys::shared_memory_segment< char_type >

  Shared memory container type.

Methods

• owner() const -> bool

  Get buffer's owner.

• unlock() -> void

  Unlock shared memory buffer.

• lock() -> void

  Lock shared memory buffer.

• xsgetn(char_type * s, std::streamsize n) -> std::streamsize

  Overrides std::streambuf::xsgetn.

• xsputn(const char_type * s, std::streamsize n) -> std::streamsize

  Overrides std::streambuf::xsputn.

• mem() const -> const shared_mem_type &

  Get raw shared memory container with header.

• ~basic_shmembuf()
• basic_shmembuf(basic_shmembuf && rhs)

  Move-constructor.

• basic_shmembuf(shared_mem_type && rhs)explicit

  Construct shared memory buffer which uses rhs as raw character buffer.