Initial contribution

src/examples/helloworld/publisher.c

@@ -0,0 +1,59 @@
+#include "ddsc/dds.h"
+#include "HelloWorldData.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+int main (int argc, char ** argv)
+{
+    dds_entity_t participant;
+    dds_entity_t topic;
+    dds_entity_t writer;
+    dds_return_t ret;
+    HelloWorldData_Msg msg;
+
+    /* Create a Participant. */
+    participant = dds_create_participant (DDS_DOMAIN_DEFAULT, NULL, NULL);
+    DDS_ERR_CHECK (participant, DDS_CHECK_REPORT | DDS_CHECK_EXIT);
+
+    /* Create a Topic. */
+    topic = dds_create_topic (participant, &HelloWorldData_Msg_desc,
+                              "HelloWorldData_Msg", NULL, NULL);
+    DDS_ERR_CHECK (topic, DDS_CHECK_REPORT | DDS_CHECK_EXIT);
+
+    /* Create a Writer. */
+    writer = dds_create_writer (participant, topic, NULL, NULL);
+
+    printf("=== [Publisher]  Waiting for a reader to be discovered ...\n");
+
+    ret = dds_set_enabled_status(writer, DDS_PUBLICATION_MATCHED_STATUS);
+    DDS_ERR_CHECK (ret, DDS_CHECK_REPORT | DDS_CHECK_EXIT);
+
+    while(true)
+    {
+      uint32_t status;
+      ret = dds_get_status_changes (writer, &status);
+      DDS_ERR_CHECK (ret, DDS_CHECK_REPORT | DDS_CHECK_EXIT);
+
+      if (status == DDS_PUBLICATION_MATCHED_STATUS) {
+        break;
+      }
+      /* Polling sleep. */
+      dds_sleepfor (DDS_MSECS (20));
+    }
+
+    /* Create a message to write. */
+    msg.userID = 1;
+    msg.message = "Hello World";
+
+    printf ("=== [Publisher]  Writing : ");
+    printf ("Message (%d, %s)\n", msg.userID, msg.message);
+
+    ret = dds_write (writer, &msg);
+    DDS_ERR_CHECK (ret, DDS_CHECK_REPORT | DDS_CHECK_EXIT);
+
+    /* Deleting the participant will delete all its children recursively as well. */
+    ret = dds_delete (participant);
+    DDS_ERR_CHECK (ret, DDS_CHECK_REPORT | DDS_CHECK_EXIT);
+
+    return EXIT_SUCCESS;
+}