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ram619

ram619

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  • Member Since: 08 Apr 13
  • Last Logged In: 11 Apr 13

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    In depth explanation of Spinlock, Semaphore, Mutex
    Seeking in depth explanation for Spinlock, Semaphore, Mutex. I tried Google but everywhere I am just getting basic working of these things. I need more explanation. like, 1. what to use when and why. 2. what is system's status while using one of these 3. Concrete differences between these Few things that I am Confused about Mutex:- 1. Recursive locking allowed or not ? Answer- As I think its operating system dependent. 2. holder can sleep or not ? Answer- Can Sleep, even while holding lock. 3, is scope limited within the process ??? that is it can't be used between two process ? Answer- Can be used between processes 4. It can't be acquired by interrupt handler or bottom half 5. to be used when u want long lock hold time ????? 6 its used for locking Semaphore:- 1. Recursive locking allowed or not ? Answer- not allowed ? 2. can sleep or not ? Answer- Can Sleep. 3, is scope limited within the process ??? that is it can't be used between two process ? Answer- Can be used between processes 4. its for synchronization or can be taken as signaling mechanism. Thanks a lot!
    Link to this post 10 Apr 13

    Seeking in depth explanation for Spinlock, Semaphore, Mutex.
    I tried Google but everywhere I am just getting basic working of these things. I need more explanation.

    like,
    1. what to use when and why.
    2. what is system's status while using one of these
    3. Concrete differences between these

    Few things that I am Confused about

    Mutex:-
    1. Recursive locking allowed or not ?
    Answer- As I think its operating system dependent.
    2. holder can sleep or not ?
    Answer- Can Sleep, even while holding lock.
    3, is scope limited within the process ??? that is it can't be used between two process ?
    Answer- Can be used between processes

    4. It can't be acquired by interrupt handler or bottom half

    5. to be used when u want long lock hold time ?????

    6 its used for locking

    Semaphore:-

    1. Recursive locking allowed or not ?
    Answer- not allowed ?
    2. can sleep or not ?
    Answer- Can Sleep.
    3, is scope limited within the process ??? that is it can't be used between two process ?
    Answer- Can be used between processes

    4. its for synchronization or can be taken as signaling mechanism.

    Thanks a lot!

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