Added a PerfTimer utility

2 files changed, 29 insertions, 0 deletions

diff --git a/src/ui/util.c b/src/ui/util.c
index c2bc8f08..5327e103 100644
--- a/src/ui/util.c
+++ b/src/ui/util.c
@@ -3042,3 +3042,16 @@ iWidget *makeTranslation_Widget(iWidget *parent) {
     setupSheetTransition_Mobile(dlg, iTrue);
     return dlg;
 }
+
+void init_PerfTimer(iPerfTimer *d) {
+    d->ticks = SDL_GetPerformanceCounter();
+}
+
+uint64_t elapsedMicroseconds_PerfTimer(const iPerfTimer *d) {
+    const uint64_t now = SDL_GetPerformanceCounter();
+    return (uint64_t) (((double) (now - d->ticks)) / (double) SDL_GetPerformanceFrequency() * 1.0e6);
+}
+
+void print_PerfTimer(const iPerfTimer *d, const char *msg) {
+    printf("[%s] %llu \u03bcs\n", msg, (unsigned long long) elapsedMicroseconds_PerfTimer(d));
+}
diff --git a/src/ui/util.h b/src/ui/util.h
index f64fac7e..94e5d8bd 100644
--- a/src/ui/util.h
+++ b/src/ui/util.h
@@ -316,3 +316,19 @@ iWidget *   makeTranslation_Widget      (iWidget *parent);
 
 const char *    languageId_String   (const iString *menuItemLabel);
 int             languageIndex_CStr  (const char *langId);
+
+/*-----------------------------------------------------------------------------------------------*/
+
+iDeclareType(PerfTimer)
+    
+struct Impl_PerfTimer {
+    uint64_t ticks;    
+};
+
+void        init_PerfTimer                  (iPerfTimer *);
+uint64_t    elapsedMicroseconds_PerfTimer   (const iPerfTimer *);
+void        print_PerfTimer                 (const iPerfTimer *, const char *msg);
+
+#define start_PerfTimer(name) iPerfTimer _##name##_PerfTimer; init_PerfTimer(&_##name##_PerfTimer)
+#define stop_PerfTimer(name)  print_PerfTimer(&_##name##_PerfTimer, #name)
+