+struct consumer_channel {
+ int fd;
+ struct ltt_channel_struct *chan;
+};
+
+struct blocked_consumer {
+ int fd_consumer;
+ int fd_producer;
+ int tmp_poll_idx;
+
+ /* args to ustcomm_send_reply */
+ struct ustcomm_server server;
+ struct ustcomm_source src;
+
+ /* args to ltt_do_get_subbuf */
+ struct rchan_buf *rbuf;
+ struct ltt_channel_buf_struct *lttbuf;
+
+ struct list_head list;
+};
+
+int consumer(void *arg)
+{
+ int result;
+ int fd;
+ char str[] = "Hello, this is the consumer.\n";
+ struct ltt_trace_struct *trace;
+ struct consumer_channel *consumer_channels;
+ int i;
+ char trace_name[] = "auto";
+
+ ltt_lock_traces();
+ trace = _ltt_trace_find(trace_name);
+ ltt_unlock_traces();
+
+ if(trace == NULL) {
+ CPRINTF("cannot find trace!");
+ return 1;
+ }
+
+ consumer_channels = (struct consumer_channel *) malloc(trace->nr_channels * sizeof(struct consumer_channel));
+ if(consumer_channels == NULL) {
+ ERR("malloc returned NULL");
+ return 1;
+ }
+
+ CPRINTF("opening trace files");
+ for(i=0; i<trace->nr_channels; i++) {
+ char tmp[100];
+ struct ltt_channel_struct *chan = &trace->channels[i];
+
+ consumer_channels[i].chan = chan;
+
+ snprintf(tmp, sizeof(tmp), "trace/%s_0", chan->channel_name);
+ result = consumer_channels[i].fd = open(tmp, O_WRONLY | O_CREAT | O_TRUNC, 00600);
+ if(result == -1) {
+ perror("open");
+ return -1;
+ }
+ CPRINTF("\topened trace file %s", tmp);
+
+ }
+ CPRINTF("done opening trace files");
+
+ for(;;) {
+ /*wait*/
+
+ for(i=0; i<trace->nr_channels; i++) {
+ struct rchan *rchan = consumer_channels[i].chan->trans_channel_data;
+ struct rchan_buf *rbuf = rchan->buf;
+ struct ltt_channel_buf_struct *lttbuf = consumer_channels[i].chan->buf;
+ long consumed_old;
+
+ result = ltt_do_get_subbuf(rbuf, lttbuf, &consumed_old);
+ if(result < 0) {
+ DBG("ltt_do_get_subbuf: error: %s", strerror(-result));
+ }
+ else {
+ DBG("success!");
+
+ result = write(consumer_channels[i].fd, rbuf->buf_data + (consumed_old & (2 * 4096-1)), 4096);
+ ltt_do_put_subbuf(rbuf, lttbuf, consumed_old);
+ }
+ }
+
+ sleep(1);
+ }
+}