C API cleanup, feature additions

* Cleaned up usage of handles vs. handle pointers
* Store global string for last error thrown
* Removed uhd::device_addr_t handle, added std::vector<std::string> handle

2 files changed, 2 insertions, 2 deletions

diff --git a/host/examples/rx_samples_c.c b/host/examples/rx_samples_c.c
index b5882b79b..abea812fe 100644
--- a/host/examples/rx_samples_c.c
+++ b/host/examples/rx_samples_c.c
@@ -215,7 +215,7 @@ int main(int argc, char* argv[])
     while (num_acc_samps < n_samples) {
         size_t num_rx_samps = 0;
         EXECUTE_OR_GOTO(close_file,
-            uhd_rx_streamer_recv(rx_streamer, buffs_ptr, samps_per_buff, md, 3.0, false, &num_rx_samps)
+            uhd_rx_streamer_recv(rx_streamer, buffs_ptr, samps_per_buff, &md, 3.0, false, &num_rx_samps)
         )
 
         uhd_rx_metadata_error_code_t error_code;
diff --git a/host/examples/tx_samples_c.c b/host/examples/tx_samples_c.c
index 3035297fd..ebf368ec7 100644
--- a/host/examples/tx_samples_c.c
+++ b/host/examples/tx_samples_c.c
@@ -201,7 +201,7 @@ int main(int argc, char* argv[]){
     size_t num_samps_sent = 0;
     while(!stop_signal_called){
         EXECUTE_OR_GOTO(free_tx_streamer,
-            uhd_tx_streamer_send(tx_streamer, buffs_ptr, samps_per_buff, md, 0.1, &num_samps_sent)
+            uhd_tx_streamer_send(tx_streamer, buffs_ptr, samps_per_buff, &md, 0.1, &num_samps_sent)
         )
         if(verbose){
             fprintf(stderr, "Sent %zu samples\n", num_samps_sent);