Add payloads, bitmaps to trace API

This is a proposed adjustment to the trace APIs.  This makes the
trace levels into a bitmask so that they can be selectively enabled
and adds a callback-level payload, plus a message-level payload.

This makes it easier for me to a GIT_TRACE_PERF callbacks that
are simply bypassed if the PERF level is not set.

1 files changed, 14 insertions, 0 deletions

diff --git a/tests/diff/diff_helpers.h b/tests/diff/diff_helpers.h
index bf21f4b1f..3ed538702 100644
--- a/tests/diff/diff_helpers.h
+++ b/tests/diff/diff_helpers.h
@@ -62,3 +62,17 @@ extern int diff_foreach_via_iterator(
 
 extern void diff_print(FILE *fp, git_diff *diff);
 extern void diff_print_raw(FILE *fp, git_diff *diff);
+
+#include "git2/trace.h"
+
+typedef struct {
+	size_t stat_calls;
+	size_t oid_calcs;
+	size_t submodule_lookups;
+} diff_perf;
+
+extern void diff_perf_track_stats(
+	git_trace_level_t level,
+	void *cb_payload,
+	void *msg_payload,
+	const char *msg);