Sack Library Documentation

The following table lists macros in this documentation.

Receives a message from the message queue
Add a message to the queue
Error result if the message to read is bigger than the buffer passed to read the message
Error result. Unexpected error (queue head/tail out of bounds) 
Error result if there is no message to read. (GetLastError() after peekmsg or readmsg returns -1) 
read any msg BUT MsgID 
if enque, fail send, return immediate on fail if deque, fail no msg ready to get... 
enque this message... it is a task ID which is waiting. 
Just peek at the next message
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