Re: Sizeof long and int for 64 bit OS

From: Rick Jones (rick.jones2_at_hp.com)
Date: 05/20/05

  • Next message: Zheng Da: "Re: Why I can not get the host's ip with the following program" 
    Date: Fri, 20 May 2005 16:45:04 GMT

    In comp.protocols.tcp-ip Victor Wagner <vitus@45.free.net> wrote:
    > I've collected expermimental data of sizeof for variuous types on
    > various platforms on the http://www.45.free.net/~vitus/intsize.html
    > There are four 64-bit platforms in the table: FreeBSD on
    > AMD/Opteron, Solaris on Sparc64, HP/UX on Itanium 64 and HP/UX on
    > PA-RISC 64.

    Since I cannot resist a nit:

    $ uname -s
    HP-UX

    > On all these platforms size of POINTER is 64 bit, and Long is 64 bit
    > also. But int is still 32 bit for compatibility with most applications.

    Those would all be considered "LP64" (L == Long, P == pointer)

    > As far as I know, 64-bit Windows (on AMD, Intel E64T, Itanium) goes
    > even further - they keep long 32bit and only long long (or int64_t)
    > and pointers are 64 bit. Although I've done no experiments.

    I've run into that with netperf. Indeed, "64-bit" Windows is a "P64"
    programming model - Pointers are 64 bits.

    rick jones 

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