Abide by the rules when passing Isolate between c and rust

Ensure that at most one mutable Isolate reference exists at a time.

`deno_execute()` and `deno_respond()` now borrow a reference to the rust-side
isolate from the caller. When we need a reference to the isolate while one of
these functions is on the stack, `deno_get_data()` can be used to borrow back
that reference.

1 files changed, 8 insertions, 2 deletions

diff --git a/src/libdeno.rs b/src/libdeno.rs
index b48ddd166..77f7f5c3e 100644
--- a/src/libdeno.rs
+++ b/src/libdeno.rs
@@ -30,13 +30,19 @@ extern "C" {
   pub fn deno_init();
   pub fn deno_v8_version() -> *const c_char;
   pub fn deno_set_v8_flags(argc: *mut c_int, argv: *mut *mut c_char);
-  pub fn deno_new(user_data: *mut c_void, cb: DenoRecvCb) -> *const isolate;
+  pub fn deno_new(cb: DenoRecvCb) -> *const isolate;
   pub fn deno_delete(i: *const isolate);
   pub fn deno_last_exception(i: *const isolate) -> *const c_char;
   pub fn deno_get_data(i: *const isolate) -> *mut c_void;
-  pub fn deno_respond(i: *const isolate, req_id: i32, buf: deno_buf);
+  pub fn deno_respond(
+    i: *const isolate,
+    user_data: *mut c_void,
+    req_id: i32,
+    buf: deno_buf,
+  );
   pub fn deno_execute(
     i: *const isolate,
+    user_data: *mut c_void,
     js_filename: *const c_char,
     js_source: *const c_char,
   ) -> c_int;