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    SubjectRe: [PATCH 0/2] eventfd: new EFD_STATE flag
    On Tue, 25 Aug 2009, Paolo Bonzini wrote:

    >
    > > There are userspace libraries that do almost everything, but you hardly
    > > see things like pthread_(EFD_STATE-like)_create() or similar system
    > > interfaces based on such abstraction.
    >
    > It actually seems as close to a condition variable as an eventfd can be.

    A pthread condition typical code usage maps to eventfd like:

    while (read(efd, ...) > 0)
    if (CONDITION)
    break;

    So a pthread condition is really a wakeup gate like eventfd is.
    EFD_STATE has nothing to do with a pthread condition.



    - Davide




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