Add nanosleep support. Remove some sleeps.

prrt/proto/clock.h

@@ -8,8 +8,9 @@
 #define MAX_TIMESTAMP (prrtTimestamp_t) 4294967295
 #define HALF_TIMESTAMP (prrtTimestamp_t) 2147483648
 
-#define usleep(t) nanosleep((const struct timespec[]){{0, t * 1000}}, NULL)
-#define sleep(t) nanosleep((const struct timespec[]){{t, 0}}, NULL)
+#define usleep_nano(t) nanosleep((const struct timespec[]){{0, t * 1000}}, NULL)
+#define sleep_nano(t) nanosleep((const struct timespec[]){{t, 0}}, NULL)
+
 
 typedef struct prrtClock {
     prrtTimestamp_t lastMeasurement;

prrt/proto/processes/feedbackReceiver.c

@@ -52,7 +52,6 @@ void *receive_feedback_loop(void *ptr)
 
     while (!atomic_load_explicit(&sock_ptr->closing, memory_order_acquire)) {
         handle_feedback(sock_ptr, MAX_PAYLOAD_LENGTH);
-        usleep(1);
     }
 
     return NULL;

prrt/receiver.c

@@ -130,7 +130,6 @@ int main(int argc, char **argv) {
         sscanf(buffer, "%u", &seqno);
         debug(DEBUG_RECEIVER, "[B (n: %3d, i: %3d)] %s", n, i, buffer);
         i++;
-        usleep(1);
     }
 
     XlapTimestampTableDumpHeader(out_desc);

prrt/sender.c

@@ -101,7 +101,7 @@ int main(int argc, char **argv) {
     #endif
 
 
-    PrrtSocket *s = PrrtSocket_create(true, 60 * 1000 * 1000);
+    PrrtSocket *s = PrrtSocket_create(true, 10 * 1000 * 1000);
     check(s != NULL, "Socket create failed.");
 
     if(strcmp(arguments.hardwarestamping_interface, "-") != 0) {
@@ -134,10 +134,10 @@ int main(int argc, char **argv) {
         PrrtSocket_send(s, (unsigned char *) buf, strlen(buf));
 
         j++;
-        // Send every 1us, as this is a sensible packet interval.
-        usleep(1);
+        // Send every 10us, as this is a sensible packet interval.
+        usleep_nano(10);
     }
-    sleep(5);
+    sleep_nano(10);
 
     XlapTimestampTableDumpHeader(out_desc);
     XlapTimestampTableDump(out_desc, ts_data_packet, tstable_data);