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-rw-r--r--trace2.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/trace2.h b/trace2.h
index ae5020d..8f89e70 100644
--- a/trace2.h
+++ b/trace2.h
@@ -20,6 +20,23 @@ struct json_writer;
*/
/*
+ * Initialize the TRACE2 clock and do nothing else, in particular
+ * no mallocs, no system inspection, and no environment inspection.
+ *
+ * This should be called at the very top of main() to capture the
+ * process start time. This is intended to reduce chicken-n-egg
+ * bootstrap pressure.
+ *
+ * It is safe to call this more than once. This allows capturing
+ * absolute startup costs on Windows which uses a little trickery
+ * to do setup work before common-main.c:main() is called.
+ *
+ * The main trace2_initialize_fl() may be called a little later
+ * after more infrastructure is established.
+ */
+void trace2_initialize_clock(void);
+
+/*
* Initialize TRACE2 tracing facility if any of the builtin TRACE2
* targets are enabled in the environment. Emits a 'version' event.
*