Using FindFirstFileA() instead of CreateFileA() to get the file size

Since we already call FindFirstFileA() and it returns the size there is
no need to open/close every file to get it's size

base.h

@@ -137,6 +137,11 @@ static void plat_sem_wait(plat_sem *s) {
   WaitForSingleObject(s->handle, INFINITE);
 }
 
+static b32 plat_sem_trywait(HANDLE sem) {
+  DWORD r = WaitForSingleObject(sem, 0);
+  return r == WAIT_OBJECT_0;
+}
+
 static void plat_sem_post(plat_sem *s, u32 count) {
   ReleaseSemaphore(s->handle, count, NULL);
 }
@@ -203,6 +208,8 @@ static void plat_sem_wait(plat_sem *s) {
   }
 }
 
+static b32 plat_sem_trywait(sem_t *sem) { return sem_trywait(sem) == 0; }
+
 static void plat_sem_post(plat_sem *s, u32 count) {
   for (u32 i = 0; i < count; i++) {
     sem_post(&s->sem);