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Add way to get c_void ptr or c_char from caller

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This commit is contained in:
mckaymatt 2017-04-02 18:37:27 -04:00
parent 41e712786e
commit 63f9ad022f
5 changed files with 32 additions and 10 deletions
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23
components/script/dom/bindings/utils.rs
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@ -33,7 +33,7 @@ use js::jsval::{JSVal, UndefinedValue};
use js::rust::{GCMethods, ToString, get_object_class, is_dom_class};
use libc;
use std::ffi::CString;
use std::os::raw::c_void;
use std::os::raw::{c_char, c_void};
use std::ptr;
use std::slice;
@ -513,3 +513,24 @@ unsafe extern "C" fn instance_class_has_proto_at_depth(clasp: *const js::jsapi::
pub const DOM_CALLBACKS: DOMCallbacks = DOMCallbacks {
instanceClassMatchesProto: Some(instance_class_has_proto_at_depth),
};
// Generic method for returning libc::c_void from caller
pub trait AsVoidPtr {
fn as_void_ptr(&self) -> *const libc::c_void;
}
impl<T> AsVoidPtr for T {
fn as_void_ptr(&self) -> *const libc::c_void {
self as *const T as *const libc::c_void
}
}
// Generic method for returning c_char from caller
pub trait AsCCharPtrPtr {
fn as_c_char_ptr(&self) -> *const c_char;
}
impl AsCCharPtrPtr for [u8] {
fn as_c_char_ptr(&self) -> *const c_char {
self as *const [u8] as *const c_char
}
}