Unnamed Shared Memory Objects

Unrelated processes generally use unnamed shared memory objects for storing queue data. This makes it possible for a client process to store data in a shared memory object without knowing its name. To use unnamed shared memory objects for storing queue data, the server process must take the following steps whenever it is called by a client:

• Save the process identification (PID) of the client process.
  
• Allocate an unnamed shared memory object for the data of the client process by calling DosAllocSharedMem.
  
• Give the client process the capability of accessing the memory object by calling DosGiveSharedMem with the client's PID.

After each client completes its queue requests or ends, the server calls DosFreeMem to release the client's memory object.