Subj : JavaScript/XPCOM and mutithreading....
To   : netscape.public.mozilla.xpcom,netscape.public.mozilla.jseng
From : jmp
Date : Thu Dec 02 2004 12:37 pm

Hi,

 
 Well, I initially assumed that Javascript is not built-in with much thread-safe stuff in it, but
 was wondering where the limit of multithreading was.

 The JS_SetContextThread( cx ) lead me to believe that only 1 cx can be executed at a time: fine!

 So I was wondering:

 Could I have: compile of the script on thread1 then using JS_SetContextThread( cx ), get the thread to execute on thread2 ?
 and what do I do with the nsIJSContextStack? or will I need to create a nsIJSThreadContextStack per thread ?

 actually, what nsIJSContextStack is all about exactly anyway

 thread 1:
  m_cx = JS_NewContext(m_rt, 8192);
  ...
  /* All the cooking for JS engine/principal/gloabl object...etc... */
  ...
  JS_CompileUCScriptForPrincipals(m_cx, m_glob, jsp , (jschar*)mScripts.get() , mScripts.Length() , "" , 0);
  JS_ClearContextThread( m_cx );
  
 then a bit later,

 thread 2:
  JS_SetContextThread( m_cx );
  JS_ExecuteScript(m_cx, m_glob, m_script, &result);
  JS_ClearContextThread( m_cx );
  

 And what about other objects/operations? are the globals defined in the javascript available
 accross threads ?

 thanks

.