c++ - How can I create another thread in the v8 -


i want set timeout v8::script::run. unfortunately,i have little experience v8. understood need use startpreemtion + loker + terminateexception. consequently, v8::script::run should in separate thread. calculation , control of execution time should in main thread. how can create thread in v8?. please me understand how it. here example of code it, function of thread doesn't start.

  v8::local<v8::value> v8executestring( v8::handle<v8::string> source, v8::handle<v8::string> filename )   {      // compiling script      // ...      // end compiling script      dword start_tick = ::gettickcount();      v8::locker::startpreemption( 1 );      {          v8::unlocker unlocker;          boost::thread* th = new boost::thread( [&] () {            v8::locker locker;            v8::handlescope handle_scope;            // running script            // v8::script::run()            // end running script         });      }     // calculation , control of execution time     v8::locker locker;     v8::handlescope handle_scope;     while ( true )     {       // terminate thread after 10 seconds       if( ( (::gettickcount() - start_tick) / 1000 ) > 10 )         // v8::v8::terminateexception(  )     }     v8::locker::stoppreemption();   }

according this v8 bug report, startpreemption() not reliable currently. however, don't need implement script execution timeout. program demonstrates way:

#include "v8.h" #include "ppltasks.h"  void main(void) {     auto isolate = v8::isolate::new();     {         v8::locker locker(isolate);         v8::isolate::scope isolatescope(isolate);         v8::handlescope handlescope(isolate);         auto context = v8::context::new();         {             v8::context::scope contextscope(context);             auto script = v8::script::compile(v8::string::new("while(true){}"));              // terminate script in 5 seconds             concurrency::create_task([isolate]             {                 concurrency::wait(5000);                 v8::v8::terminateexecution(isolate);             });              // run script             script->run();         }         context.dispose();     }     isolate->dispose(); }

the timer implementation here suboptimal , specific windows concurrency runtime, it's example. luck!


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