...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::interprocess::windows_shared_memory
class windows_shared_memory { public: // construct/copy/destruct windows_shared_memory(); windows_shared_memory(create_only_t, const char *, mode_t, std::size_t); windows_shared_memory(open_or_create_t, const char *, mode_t, std::size_t); windows_shared_memory(open_only_t, const char *, mode_t); windows_shared_memory(unspecified); windows_shared_memory& operator=(unspecified); ~windows_shared_memory(); // public member functions void swap(windows_shared_memory &) ; const char * get_name() const; mode_t get_mode() const; mapping_handle_t get_mapping_handle() const; };
A class that wraps the native Windows shared memory that is implemented as a file mapping of the paging file. Unlike shared_memory_object, windows_shared_memory has no kernel persistence and the shared memory is destroyed when all processes destroy all their windows_shared_memory objects and mapped regions for the same shared memory or the processes end/crash.
Warning: Windows native shared memory and interprocess portable shared memory (boost::interprocess::shared_memory_object) can't communicate between them.
windows_shared_memory
public
construct/copy/destructwindows_shared_memory();
Default constructor. Represents an empty windows_shared_memory.
windows_shared_memory(create_only_t, const char * name, mode_t mode, std::size_t size);
Creates a new native shared memory with name "name" and mode "mode", with the access mode "mode". If the file previously exists, throws an error.
windows_shared_memory(open_or_create_t, const char * name, mode_t mode, std::size_t size);
Tries to create a shared memory object with name "name" and mode "mode", with the access mode "mode". If the file previously exists, it tries to open it with mode "mode". Otherwise throws an error.
windows_shared_memory(open_only_t, const char * name, mode_t mode);
Tries to open a shared memory object with name "name", with the access mode "mode". If the file does not previously exist, it throws an error.
windows_shared_memory(unspecified moved);
Moves the ownership of "moved"'s shared memory object to *this. After the call, "moved" does not represent any shared memory object. Does not throw
windows_shared_memory& operator=(unspecified moved);
Moves the ownership of "moved"'s shared memory to *this. After the call, "moved" does not represent any shared memory. Does not throw
~windows_shared_memory();
Destroys *this. All mapped regions are still valid after destruction. When all mapped regions and windows_shared_memory objects referring the shared memory are destroyed, the operating system will destroy the shared memory.
windows_shared_memory
public member functionsvoid swap(windows_shared_memory & other) ;
const char * get_name() const;
mode_t get_mode() const;
mapping_handle_t get_mapping_handle() const;