1 files changed, 54 insertions, 0 deletions
diff --git a/engines/sci/sfx/timer.cpp b/engines/sci/sfx/timer.cpp
new file mode 100644
index 0000000000..beb57aef6b
--- /dev/null
+++ b/engines/sci/sfx/timer.cpp
@@ -0,0 +1,54 @@
+#include "common/timer.h"
+#include "engines/engine.h"
+#include "sci/include/sfx_timer.h"
+
+
+#define FREQ 60
+#define DELAY (1000000 / FREQ)
+
+typedef void (*scummvm_timer_callback_t)(void *);
+static scummvm_timer_callback_t scummvm_timer_callback = NULL;
+static void *scummvm_timer_callback_data = NULL;
+extern ::Engine *g_engine;
+
+void scummvm_timer_update_internal(void *ptr) {
+	if (scummvm_timer_callback)
+		scummvm_timer_callback(scummvm_timer_callback_data);
+}
+
+int scummvm_timer_start(void (*func)(void *), void *data) {
+	if (scummvm_timer_callback) {
+		fprintf(stderr,
+		        "Error: Attempt to initialize gametick timer more than once\n");
+		return SFX_ERROR;
+	}
+
+	if (!func) {
+		fprintf(stderr,
+		        "Error: Attempt to initialize gametick timer w/o callback\n");
+		return SFX_ERROR;
+	}
+
+	scummvm_timer_callback = func;
+	scummvm_timer_callback_data = data;
+
+	::g_engine->getTimerManager()->installTimerProc(&scummvm_timer_update_internal, DELAY, NULL);
+	return SFX_OK;
+}
+
+int scummvm_timer_stop() {
+	scummvm_timer_callback = NULL;
+	return SFX_OK;
+}
+
+
+sfx_timer_t sfx_timer_scummvm = {
+	"ScummVM",
+	"0.1",
+	DELAY / 1000, 0,
+	NULL,
+	&scummvm_timer_start,
+	&scummvm_timer_stop,
+	0,
+	0
+};