Introduce vtracelog

[lttng-ust.git] / doc / examples / demo-tracelog / demo-vtracelog.c

diff --git a/doc/examples/demo-tracelog/demo-vtracelog.c b/doc/examples/demo-tracelog/demo-vtracelog.c
new file mode 100644 (file)
index 0000000..c3e604c
--- /dev/null
+++ b/doc/examples/demo-tracelog/demo-vtracelog.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2020  Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; version 2.1 of
+ * the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include <lttng/tracelog.h>
+
+void print_err(const char* msg, ...)
+{
+       va_list ap;
+
+       va_start(ap, msg);
+       vtracelog(TRACE_ERR, msg, ap);
+       va_end(ap);
+}
+
+int main(int argc, char **argv)
+{
+       int i;
+       int delay = 0;
+       const char *str = "mystring test";
+       long l = 0x42;
+
+       if (argc > 2)
+               delay = atoi(argv[1]);
+
+       fprintf(stderr, "Demo program starting.\n");
+
+       sleep(delay);
+
+       fprintf(stderr, "Tracing... ");
+
+       for (i = 0; i < 5; i++) {
+               print_err("This is a \"%s\" formatted %d error event %lx", str, i, l);
+       }
+
+       fprintf(stderr, " done.\n");
+       return 0;
+}