lockf() on system i

["Schmidt, Mihael" <Mihael.Schmidt@xxxxxxxxxxx>]

Hi,

I'm quite new to C especially ILE C and am trying to port a software written in C (with target platform Linux/Unix) to ILE C.

The software uses the lockf() function which is available on other platforms but not on System i.

The "UNIX C Applications Porting to AS/400 Companion Guide" also points out that there are problems but gives a function which should be used for lockf().

On most (probably all) systems lockf the following declaration:
int lockf(int fildes, int function, off_t size); 

But the function from the IBM redbook has:
int lockf(_RFILE *fildes, int function, int size)

Where _RFILE is:

typedef _Packed struct {                     
  char                         reserved1[16];
  volatile void  *const *const in_buf;       
  volatile void  *const *const out_buf;      
  char                         reserved2[48];   
  _RIOFB_T                     riofb;           
  char                         reserved3[32];   
  const unsigned int           buf_length;      
  char                         reserved4[28];   
  volatile char  *const        in_null_map;     
  volatile char  *const        out_null_map;    
  volatile char  *const        null_key_map;    
  char                         reserved5[48];   
  const int                    min_length;      
  short                        null_map_len;    
  short                        null_key_map_len;
  char                         reserved6[8];    
} _RFILE;                                       

What do I have to do to get these two worlds together ?

For those interested: I try to port the template engine ClearSilver (www.clearsilver.net) to ILE C to be able to use it from RPG.

Any ideas?

Thanx in advance

Mihael Schmidt
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