ACE Cached Virtual File system
1. ACE_Filecache_Handle

Abstraction over a real file. This is meant to be the entry point into the Cached Virtual Filesystem

2. ACE_Filecache

A hash table holding the information about entry point into the Cached Virtual Filesystem. On insertion, the reference count is incremented. On destruction, reference count is decremented

3.ACE_Filecache_Object

Abstraction over a real file. This is what the Virtual Filesystem contains. This class is not intended for general consumption. Please consult a physician before attempting to use this class


Examples: see ACE_WRAPPERS/apps/JAWS/server/IO.cpp

void
JAWS_Synch_IO::receive_file (const char *filename,
                          void *initial_data,
                          int initial_data_length,
                          int entire_length)
{
 ACE_Filecache_Handle handle (filename, entire_length);

 int result = handle.error ();

 if (result == ACE_Filecache_Handle::ACE_SUCCESS)
 {
    ...
   ACE_OS::memcpy (handle.address (), initial_data, bytes_to_memcpy);
    ...
 }
}


void
JAWS_Synch_IO::transmit_file (const char *filename,
                             const char *header,
                             int header_size,
                             const char *trailer,
                             int trailer_size)
{
 ACE_Filecache_Handle handle (filename);

 int result = handle.error ();

 if (result == ACE_Filecache_Handle::ACE_SUCCESS)
 {
     ACE_SOCK_Stream stream;
     ...
     (stream.send_n (handle.address (), handle.size ())
     ...
  }

- posted by Pop @ 12:04 AM