Trait GCMethods 

pub trait GCMethods: Initialize {
    // Required method
    unsafe fn post_barrier(v: *mut Self, prev: Self, next: Self);

    // Provided method
    unsafe fn initial() -> Self { ... }
}

A trait for types which can place appropriate GC barriers.

• https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey/Internals/Garbage_collection#Incremental_marking
• https://dxr.mozilla.org/mozilla-central/source/js/src/gc/Barrier.h

Required Methods

unsafe fn post_barrier(v: *mut Self, prev: Self, next: Self)

Place a post-write barrier

Provided Methods

unsafe fn initial() -> Self

Create a default value

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl GCMethods for *mut BigInt

unsafe fn post_barrier( v: *mut *mut BigInt, prev: *mut BigInt, next: *mut BigInt, )

impl GCMethods for *mut JSFunction

unsafe fn post_barrier( v: *mut *mut JSFunction, prev: *mut JSFunction, next: *mut JSFunction, )

impl GCMethods for *mut JSObject

unsafe fn post_barrier( v: *mut *mut JSObject, prev: *mut JSObject, next: *mut JSObject, )

impl GCMethods for *mut JSScript

unsafe fn post_barrier( v: *mut *mut JSScript, prev: *mut JSScript, next: *mut JSScript, )

impl GCMethods for *mut JSString

unsafe fn post_barrier( v: *mut *mut JSString, prev: *mut JSString, next: *mut JSString, )

impl GCMethods for *mut Symbol

unsafe fn post_barrier(_: *mut *mut Symbol, _: *mut Symbol, _: *mut Symbol)

Implementors

impl GCMethods for PropertyDescriptor

impl GCMethods for PropertyKey

impl GCMethods for Value