cancellation points list needed!!

This is a discussion on cancellation points list needed!! within the Linux Programming forums, part of the Platform Specific Boards category; I have difficulties in finding good documentation of cancellation points among "ordinary" library functions I manually noted in the past ...

  1. #1
    Alessio Stella
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    cancellation points list needed!!

    I have difficulties in finding good documentation of cancellation points among "ordinary" library functions

    I manually noted in the past the following list but it might be incomplete and/or not up to date:
    //CANCELATION POINTS
    /*
    * pthread_cond_wait
    * pthread_cond_timedwait_relative
    * pthread_join
    * sem_wait
    *
    //might be some of the following are ASYNC (not internally DEFERRED). In that case cancellation handlers will run anyway.
    close(2).
    fcntl(2).
    fsync(2).
    lseek(2).
    msync(2).
    nanosleep(2).
    open(2).
    pause(2).
    read(2).
    system(3).
    tcdrain(2).
    wait(2).
    waitpid(2).
    write(2).
    *
    * accept(2)
    * connect(2)
    * recv(2)
    * recvfrom(2).
    * recvmsg(2).
    * send(2).
    * sendmsg(2).
    * sendto(2).


    Could you please suggest a link where to find this documentat. (complete! easy! up to date!)?

    For instance here http://linux.die.net/man/2/accept accept is not mentioned as a cancellation point but i had noted it down! I probably read it somewhere on the internet do not remember where..

    Quite confusing..

  2. #2
    Cat without Hat CornedBee's Avatar
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    Tricky business. It seems very hard to find a general list of cancellation points.

    I found this, but it's not for Linux.
    http://compute.cnr.berkeley.edu/cgi-...cancellation+5

    By the way, this thread should be in the Linux forum.
    Last edited by CornedBee; 11-27-2008 at 11:34 AM.
    All the buzzt!
    CornedBee

    "There is not now, nor has there ever been, nor will there ever be, any programming language in which it is the least bit difficult to write bad code."
    - Flon's Law

  3. #3
    Registered User Codeplug's Avatar
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    There's a list in the "System Interfaces" volume, section 2.9.5.

    http://www.opengroup.org/onlinepubs/...ag_02_09_05_02

    gg

  4. #4
    Alessio Stella
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    Quote Originally Posted by Codeplug View Post
    There's a list in the "System Interfaces" volume, section 2.9.5.

    http://www.opengroup.org/onlinepubs/...ag_02_09_05_02

    gg
    Interesting thanks
    Is that POSIX specs?
    I guess Linux doesn't necessarily follow 100% of this

  5. #5
    Kernel hacker
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    Linux may not necessarily be 100% posix compliant, but the specification is quite clear:
    An implementation shall not introduce cancellation points into any other functions specified in this volume of IEEE Std 1003.1-2001.
    --
    Mats
    Compilers can produce warnings - make the compiler programmers happy: Use them!
    Please don't PM me for help - and no, I don't do help over instant messengers.

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