[boost] windows_shared_memory - does memory block exists?

21 Jul 2013

      Hi,

Why native windows shared memory does not include any means to check
for existance of memory block without throwing exceptions?

A small function would be enough:

// boost::interprocess::windows_shared_memory
static bool exists(const std::string &a_path)
{
  using namespace boost::interprocess;

  try {
     unsigned long file_map_access = winapi::page_readonly;
     unsigned long map_access = winapi::file_map_read;

     void *test_handle = winapi::open_file_mapping(map_access, a_path.c_str());

     bool res = (test_handle != NULL);

     if(res) 
        winapi::close_handle(test_handle);    

     return res;
  } 
  catch(...) {
    return false;
  }
}

Without this I have to use Boost internals (winapi::*) in my
application.

Would somebody consider including this code or something similar?

Regards,
Piotr

[boost] windows_shared_memory - does memory block exists?

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