/* read cursize, which can only increase while we're working */
cursize = svm_fifo_max_dequeue (f);
/* read cursize, which can only increase while we're working */
cursize = svm_fifo_max_dequeue (f);
real_head = real_head >= nitems ? real_head - nitems : real_head;
/* Number of bytes we're going to copy */
real_head = real_head >= nitems ? real_head - nitems : real_head;
/* Number of bytes we're going to copy */