static void check_buffer(struct reader_thread_data *self)
{
size_t subbufs_consumed;
lseek(self->produced_file, 0, SEEK_SET);
if (read(self->produced_file, &self->produced,
sizeof(self->produced)) < 0) {
eprintf("Couldn't read from produced file for cpu %d, "
"exiting: errcode = %d: %s\n", self->cpu,
errno, strerror(errno));
exit(1);
}
subbufs_consumed = process_subbufs(self);
if (subbufs_consumed) {
if (subbufs_consumed == self->n_subbufs)
eprintf("cpu %d buffer full. "
"Consider using a larger buffer size.\n",
self->cpu);
if (subbufs_consumed > self->max_backlog) {
self->max_backlog = subbufs_consumed;
}
self->consumed += subbufs_consumed;
if (write(self->consumed_file, &subbufs_consumed,
sizeof(subbufs_consumed)) < 0) {
eprintf("Couldn't write to consumed file for cpu %d, "
"exiting: errcode = %d: %s\n",
self->cpu, errno, strerror(errno));
exit(1);
}
}
}
/**
* check_buffer - check for and read any available sub-buffers in a buffer
*/
static void check_buffer(unsigned cpu)
{
size_t subbufs_consumed;
lseek(produced_file[cpu], 0, SEEK_SET);
if (read(produced_file[cpu], &status[cpu].produced,
sizeof(status[cpu].produced)) < 0) {
printf("Couldn't read from consumed file for cpu %d, exiting: errcode = %d: %s\n", cpu, errno, strerror(errno));
exit(1);
}
subbufs_consumed = process_subbufs(cpu);
if (subbufs_consumed) {
if (subbufs_consumed == n_subbufs)
fprintf(stderr, "cpu %d buffer full. Consider using a larger buffer size.\n", cpu);
if (subbufs_consumed > status[cpu].max_backlog)
status[cpu].max_backlog = subbufs_consumed;
status[cpu].consumed += subbufs_consumed;
if (write(consumed_file[cpu], &subbufs_consumed,
sizeof(subbufs_consumed)) < 0) {
printf("Couldn't write to consumed file for cpu %d, exiting: errcode = %d: %s\n", cpu, errno, strerror(errno));
exit(1);
}
}
}
