Struct WorkerUnprotectGuard 

pub struct WorkerUnprotectGuard(i32);

A Send-safe guard that calls Rf_unprotect(n) on drop via with_r_thread.

Use this when you Rf_protect on the R main thread, then need the unprotect to happen when a guard drops on a worker thread (e.g., rayon parallel code).

OwnedProtect and ProtectScope are !Send — they can only be used on the R main thread. WorkerUnprotectGuard fills the gap for cross-thread patterns where allocation + protect happen on the R thread but the guard lives on a worker.

Example

use miniextendr_api::gc_protect::WorkerUnprotectGuard;

let sexp = with_r_thread(|| unsafe {
    let sexp = Rf_allocVector(REALSXP, n);
    Rf_protect(sexp);
    sexp
});
let _guard = WorkerUnprotectGuard::new(1);

// ... parallel work on sexp's data ...
// _guard drops here, dispatching Rf_unprotect(1) back to R thread

Tuple Fields

0: i32

Implementations

impl WorkerUnprotectGuard

pub fn new(n: i32) -> Self

Create a guard that will unprotect n entries on drop.

Trait Implementations

impl Drop for WorkerUnprotectGuard

fn drop(&mut self)

Executes the destructor for this type.

impl Send for WorkerUnprotectGuard