libmach: initial API bindings for mach core

libmach/test.c

@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef void mach_core_callback(void*);
+
+// `libmach` exported API bindings
+void mach_core_set_init(mach_core_callback);
+void mach_core_set_update(mach_core_callback);
+void mach_core_set_deinit(mach_core_callback);
+void mach_run(void);
+void core_set_should_close(void*);
+float core_delta_time(void*);
+
+static float elapsed = 0;
+
+void my_init(void* core) {
+  printf("My init!\n");
+}
+
+void my_update(void* core) {
+  float dt = core_delta_time(core);
+  if (elapsed < 1.0) {
+    elapsed += dt;
+  } else {
+    core_set_should_close(core);
+  }
+  printf("My update! total time = %f\n", elapsed);
+}
+
+void my_deinit(void* core) {
+  printf("My deinit!\n");
+}
+
+int main() {
+  mach_core_set_init(my_init);
+  mach_core_set_update(my_update);
+  mach_core_set_deinit(my_deinit);
+  mach_run();
+  return 0;
+}