UNIX Network Programming, Volume 2: Interprocess by W. Richard Stevens

By W. Richard Stevens

Well-implemented interprocess communications (IPC) are key to the functionality of just about each non-trivial UNIX application. In UNIX community Programming, quantity 2, moment version, mythical UNIX specialist W. Richard Stevens provides a accomplished advisor to each kind of IP, together with message passing, sychronization, shared reminiscence, and distant process Calls (RPC).
Stevens starts with a uncomplicated creation to IPC and the issues it really is meant to unravel. step by step you'll the right way to maximize either procedure V IPC and the recent Posix criteria, which supply dramatic advancements in comfort and function. You'll locate huge insurance of Pthreads, with many examples reflecting a number of threads rather than a number of methods. alongside the best way, you'll grasp each present IPC approach and know-how, including:
* Pipes and FIFOs
* Posix and procedure V Message Queues
* Mutexes and situation Variables
* Read-Write Locks
* checklist Locking
* Posix and procedure V Semaphores
* Posix and process V Shared Memory
* Solaris doorways and sunlight RPC
* functionality Measurements of IPC Techniques

If you've learn Stevens' best-selling first version of UNIX community Programming, this booklet expands its IPC assurance via an element of 5. You won't simply find out about IPC "from the outside". You'll really create implemenations of Posix message queues, read-write locks, and semaphores, gaining an in-depth figuring out of those services you just can't get wherever else.

The e-book includes vast new resource code -- all rigorously optimized and to be had on the internet. You'll even discover a whole advisor to measuring IPC functionality with message passing bandwidth and latency courses, and thread and strategy synchronization programs.

The greater IPC, the higher your UNIX software program will run. This booklet includes all you want to understand.

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Extra info for UNIX Network Programming, Volume 2: Interprocess Communications (2nd Edition)

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Once the pathname and id are agreed on by the client and server, then both can call the f tok function to convert these into the same IPC key. Typical implementations of f tok call the stat function and then combine 1. information about the filesystem on which pathname resides (the st-dev member of the stat structure), 2. the file's i-node number within the filesystem (the st-ino member of the stat structure), and 3. the low-order 8 bits of the id. The combination of these three values normally produces a 32-bit key.

For example, if the system is configured for a maximum of 50 message queues, then the first time the first message queue table entry in the kernel is used, the identifier returned to the process is zero. After this message queue is removed and the first table entry is reused, the identifier returned is 50. The next time, the identifier is 100, and so on. 3), it cycles after the table entry has been used 85,899,346 times (232/50,assuming 32-bit long integers). A second reason for incrementing the slot usage sequence number is to avoid short term reuse of the System V IPC identifiers.

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