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, 4 insertions, 3 deletions

diff --git a/libdeno/deno.h b/libdeno/deno.h
index d3c2cf762..c166c7fde 100644
--- a/libdeno/deno.h
+++ b/libdeno/deno.h
@@ -30,7 +30,7 @@ void deno_init();
 const char* deno_v8_version();
 void deno_set_v8_flags(int* argc, char** argv);
 
-Deno* deno_new(void* user_data, deno_recv_cb cb);
+Deno* deno_new(deno_recv_cb cb);
 void deno_delete(Deno* d);
 
 // Returns the void* user_data provided in deno_new.
@@ -39,7 +39,8 @@ void* deno_get_data(Deno*);
 // Returns false on error.
 // Get error text with deno_last_exception().
 // 0 = fail, 1 = success
-int deno_execute(Deno* d, const char* js_filename, const char* js_source);
+int deno_execute(Deno* d, void* user_data, const char* js_filename,
+                 const char* js_source);
 
 // deno_respond sends up to one message back for every deno_recv_cb made.
 //
@@ -59,7 +60,7 @@ int deno_execute(Deno* d, const char* js_filename, const char* js_source);
 //
 // A non-zero return value, means a JS exception was encountered during the
 // libdeno.recv() callback. Check deno_last_exception() for exception text.
-int deno_respond(Deno* d, int32_t req_id, deno_buf buf);
+int deno_respond(Deno* d, void* user_data, int32_t req_id, deno_buf buf);
 
 const char* deno_last_exception(Deno* d);