PPT Slide
- int ReceiveMessage(int msg_q_id, int *msg) - Receive 8 integers from the specified message queue; block if not available; -1 = not a valid msg_q, JavaSOS version: SOSSyscallInthandler. ReceiveMessageSystemCall (see AppTest.java)
- int ReadDiskBlock(int blockNumber, char *buffer) - read disk block into memory buffer; note this always succeeds (not realistic:)
- JavaSOS version: SOSSyscallInthandler.DiskReadSystemCall (note switching of verb & noun)
- int WriteDiskBlock(int blockNumber, char *buffer) - write disk block from memory buffer; note this always succeeds (also not realistic:)