From: Eric Hodel <drbrain@...7.net>
Date: 2006-02-12T16:18:26+09:00
Subject: Re: ruby/dl question

On Feb 10, 2006, at 7:30 PM, ara.t.howard@noaa.gov wrote:

> if one has:
>
>  struct flock {
>      ...
>      short l_type;    /* Type of lock: F_RDLCK,
>                          F_WRLCK, F_UNLCK */
>      short l_whence;  /* How to interpret l_start:
>                          SEEK_SET, SEEK_CUR, SEEK_END */
>      off_t l_start;   /* Starting offset for lock */
>      off_t l_len;     /* Number of bytes to lock */
>      pid_t l_pid;     /* PID of process blocking our lock
>                          (F_GETLK only) */
>      ...
>  };
>
> can this structure be desribed using ruby/dl?  i'm worried that the  
> struct
> method assumes the fields are in order which, in the case of the flock
> structure, they may not be.

You have a bigger problem, off_t is usually 8 bytes and the built-in  
dl can only handle 4 byte types.  (Or, if it can handle 8 byte types,  
I couldn't figure out how.)

-- 
Eric Hodel - drbrain@segment7.net - http://segment7.net
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