Add binding for ArrayBuffer::Allocator::NewDefaultAllocator (#13)

BUILD.gn

@@ -3,6 +3,7 @@ import("//third_party/v8/gni/v8.gni")
 
 v8_static_library("rusty_v8") {
   sources = [
+    "src/array_buffer.cc",
     "src/inspector/channel.cc",
     "src/inspector/client.cc",
     "src/isolate.cc",

src/array_buffer.cc

@@ -0,0 +1,13 @@
+#include "v8.h"
+
+using namespace v8;
+
+extern "C" {
+ArrayBuffer::Allocator* v8__ArrayBuffer__Allocator__NewDefaultAllocator() {
+  return ArrayBuffer::Allocator::NewDefaultAllocator();
+}
+
+void v8__ArrayBuffer__Allocator__DELETE(ArrayBuffer::Allocator& self) {
+  delete &self;
+}
+}  // extern "C"

src/array_buffer.rs

@@ -0,0 +1,36 @@
+use crate::support::Delete;
+use crate::support::Opaque;
+use crate::support::UniquePtr;
+
+extern "C" {
+  fn v8__ArrayBuffer__Allocator__NewDefaultAllocator() -> *mut Allocator;
+  fn v8__ArrayBuffer__Allocator__DELETE(this: &'static mut Allocator);
+}
+
+// TODO: allow the user to implement their own Allocator.
+#[repr(C)]
+pub struct Allocator(Opaque);
+
+impl Allocator {
+  pub fn new_default_allocator() -> UniquePtr<Allocator> {
+    unsafe {
+      UniquePtr::from_raw(v8__ArrayBuffer__Allocator__NewDefaultAllocator())
+    }
+  }
+}
+
+impl Delete for Allocator {
+  fn delete(&'static mut self) {
+    unsafe { v8__ArrayBuffer__Allocator__DELETE(self) };
+  }
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+
+  #[test]
+  fn test_default_allocator() {
+    Allocator::new_default_allocator();
+  }
+}

src/lib.rs

@@ -9,6 +9,7 @@
 extern crate lazy_static;
 extern crate libc;
 
+pub mod array_buffer;
 pub mod inspector;
 pub mod isolate;
 pub mod locker;