1 files changed, 70 insertions, 0 deletions
diff --git a/src/timing.h b/src/timing.h
new file mode 100644
index 0000000..44e91a8
--- /dev/null
+++ b/src/timing.h
@@ -0,0 +1,70 @@
+#ifndef MACOS_TIMING_H
+#define MACOS_TIMING_H
+
+#include <stdint.h>
+#include <CoreAudio/CoreAudio.h>
+
+#define BEGIN_SCOPED_TIMED_BLOCK(note) \
+    do { \
+        struct timing_info timing; \
+        if (profile) begin_timing(&timing, note)
+#define END_SCOPED_TIMED_BLOCK() \
+        if (profile) end_timing(&timing); \
+    } while (0)
+
+#define BEGIN_TIMED_BLOCK(note) \
+    struct timing_info timing; \
+    if (profile) begin_timing(&timing, note)
+#define END_TIMED_BLOCK() \
+    if (profile) end_timing(&timing)
+
+static bool profile;
+
+struct timing_info
+{
+    char *note;
+    uint64_t start;
+    uint64_t end;
+    float ms;
+};
+
+void begin_timing(struct timing_info *timing, char *note);
+void end_timing(struct timing_info *timing);
+
+static inline uint64_t
+macos_get_wall_clock(void)
+{
+    uint64_t result = AudioConvertHostTimeToNanos(AudioGetCurrentHostTime());
+    return result;
+}
+
+static inline float
+macos_get_seconds_elapsed(uint64_t start, uint64_t end)
+{
+    float result = ((float)(end - start) / 1000.0f) / 1000000.0f;
+    return result;
+}
+
+static inline float
+macos_get_milliseconds_elapsed(uint64_t start, uint64_t end)
+{
+    float result = 1000.0f * macos_get_seconds_elapsed(start, end);
+    return result;
+}
+
+void begin_timing(struct timing_info *timing, char *note) {
+    timing->note = note;
+    timing->start = macos_get_wall_clock();
+}
+
+void end_timing(struct timing_info *timing) {
+    timing->end = macos_get_wall_clock();
+    timing->ms  = macos_get_milliseconds_elapsed(timing->start, timing->end);
+    if (timing->note) {
+        printf("%6.4fms (%s)\n", timing->ms, timing->note);
+    } else {
+        printf("%6.4fms\n", timing->ms);
+    }
+}
+
+#endif