unify heap allocation handling

src/lib.rs

@@ -34,6 +34,7 @@ pub use crate::command::*;
 pub use crate::connection::*;
 pub use crate::cp437_grid::*;
 pub use crate::packet::*;
+use std::ptr::NonNull;
 
 mod bitmap;
 mod bitvec;
@@ -49,3 +50,15 @@ use std::time::Duration;
 
 /// Actual hardware limit is around 28-29ms/frame. Rounded up for less dropped packets.
 pub const SP_FRAME_PACING_MS: u128 = Duration::from_millis(30).as_millis();
+
+pub(crate) fn heap_move<T>(x: T) -> *mut T {
+    Box::into_raw(Box::new(x))
+}
+
+pub(crate) fn heap_move_nonnull<T>(x: T) -> NonNull<T> {
+    NonNull::from(Box::leak(Box::new(x)))
+}
+
+pub(crate) unsafe fn heap_drop<T>(x: NonNull<T>) {
+    drop(unsafe { Box::from_raw(x.as_ptr()) });
+}