ftp.nice.ch/Attic/openStep/implementation/gnustep/sources/alpha-snapshots/pthreads.0.9.2.tgz#/pthreads-0.9.2/socklib/recv.c

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#include "pthread_socket.h"
#include "pthread_io_delay.h"

extern void fd_init( void );
extern pthread_once_t io_initialized;

static inline
_syscall2(long,socketcall,int,call,unsigned long *,args); 

static int
syscall_recv( int fd,
                  void *buf,
                  int len,
                  unsigned int flags)
{
   unsigned long args[4];
   int ret;

   args[0] = (unsigned long) fd;
   args[1] = (unsigned long) buf;
   args[2] = (unsigned long) len;
   args[3] = (unsigned long) flags;

   LOCK_ON

       ret = socketcall( SYS_RECV, args );

   LOCK_OFF
   return( ret );
}
/*--------------------------------------------------------------------------
 * @@          R E C V
 *--------------------------------------------------------------------------
 * The recv function behaves in all respects like the
 * BSD accept() function except that only the calling thread is blocked.
 */
int 
recv( int fd, 
      void *buf, 
      int len, 
      unsigned int flags )
{
   int  ret, err, st;

   st = pthread_once( &io_initialized, fd_init );
   if( st != SUCCESS )
       return( NOTOK );   

   if( nonblock_is_set( fd ))
   {
       ret = syscall_recv( fd, buf, len, flags );
       RETURN( ret );
   }

   set_fd_nonblock( fd );
   while((ret = syscall_recv( fd, buf, len, flags )) < OK )
   {
       (void) pthread_get_errno_np( NULL, &err );
       if( err != EWOULDBLOCK )
           break;

       pthread_delay_np( &delay_interval );
   }

   clear_fd_nonblock( fd );
   return( ret );
}

These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.