add a perf counter.

2 files changed, 30 insertions, 3 deletions

diff --git a/Makefile b/Makefile
index e63d489..9c60385 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,5 @@
-DEBUG = 0
+DEBUG     = 0
+PERF_TEST = 1
 
 ifeq ($(platform),)
 platform = unix
@@ -175,6 +176,10 @@ else
 FLAGS += -O3 -DNDEBUG
 endif
 
+ifeq ($(PERF_TEST),1)
+FLAGS += -DPERF_TEST
+endif
+
 LDFLAGS += $(fpic) -lz $(SHARED)
 FLAGS += $(fpic) 
 FLAGS += -Isource -I. 
diff --git a/libretro.c b/libretro.c
index d553590..f8baac8 100644
--- a/libretro.c
+++ b/libretro.c
@@ -20,10 +20,25 @@ static retro_input_poll_t poll_cb = NULL;
 static retro_input_state_t input_cb = NULL;
 static retro_audio_sample_batch_t audio_batch_cb = NULL;
 static retro_environment_t environ_cb = NULL;
-
-
 struct retro_perf_callback perf_cb;
 
+#ifdef PERF_TEST
+#define RETRO_PERFORMANCE_INIT(name) \
+   retro_perf_tick_t current_ticks;\
+   static struct retro_perf_counter name = {#name};\
+   if (!name.registered) perf_cb.perf_register(&(name));\
+   current_ticks = name.total
+
+#define RETRO_PERFORMANCE_START(name) perf_cb.perf_start(&(name))
+#define RETRO_PERFORMANCE_STOP(name) \
+   perf_cb.perf_stop(&(name));\
+   current_ticks = name.total - current_ticks;
+#else
+#define RETRO_PERFORMANCE_INIT(name)
+#define RETRO_PERFORMANCE_START(name)
+#define RETRO_PERFORMANCE_STOP(name)
+#endif
+
 void retro_set_environment(retro_environment_t cb)
 {
    struct retro_log_callback log;
@@ -354,6 +369,10 @@ void retro_deinit(void)
    S9xDeinitDisplay();
    S9xDeinitAPU();
    Deinit();
+
+#ifdef PERF_TEST
+   perf_cb.perf_log();
+#endif
 }
 
 uint32 S9xReadJoypad(int port)
@@ -397,7 +416,10 @@ void retro_run(void)
    S9xSetPlaybackRate(32040);
    SoundData.echo_enable = FALSE;
 
+   RETRO_PERFORMANCE_INIT(S9xMainLoop_func);
+   RETRO_PERFORMANCE_START(S9xMainLoop_func);
    S9xMainLoop();
+   RETRO_PERFORMANCE_STOP(S9xMainLoop_func);
 
    static int16_t audio_buf[534 << 1];
    S9xMixSamples((uint8*)audio_buf, 534 << 1);