Function patch_seq_strand_spawn 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn patch_seq_strand_spawn(
    entry: extern "C" fn(Stack) -> Stack,
    initial_stack: Stack,
) -> i64

Spawn a strand (coroutine) with initial stack

Safety

• entry must be a valid function pointer that can safely execute on any thread
• initial_stack must be either null or a valid pointer to a StackValue that:
  • Was heap-allocated (e.g., via Box)
  • Has a ’static lifetime or lives longer than the coroutine
  • Is safe to access from the spawned thread
• The caller transfers ownership of initial_stack to the coroutine
• Returns a unique strand ID (positive integer)

Memory Management

The spawned coroutine takes ownership of initial_stack and will automatically free the final stack returned by entry upon completion.