Maybe the application exits before the thread has been executed? Try to
join the thread before executing the application.
/Peter
Den lördagen den 1:e februari 2014 kl. 10:58:08 UTC+1 skrev Sara
Abdelhameed:
>
> I tried to work with Isolate::New() for each thread "including the main
> thread" and then Isolate::Scope but it behaved as before, only printed
> hello, world of the main thread and didn't print hi,Sara of the 2nd thread.
> is this because they need a synchronization as they can't work in the same
> time so I must use v8::Lock? or what is the problem?
>
> here is the code:
> #include <v8.h>
> #include <pthread.h>
> using namespace v8;
> void* threadFunction(void*){
> Isolate* isolate1 = Isolate::New();
> if(isolate1 == NULL){
> printf("Error1");
> return 0;
> }
> Isolate::Scope isolate_scope1(isolate1);
> HandleScope handle_scope1(isolate1);
> Handle<Context> context1 = Context::New(isolate1);
> Context::Scope context_scope1(context1);
> Handle<String> source1 = String::NewFromUtf8(isolate1, "'Hi' + ',
> Sara'");
> Handle<Script> script1 = Script::Compile(source1);
> Handle<Value> result1 = script1->Run();
> String::Utf8Value utf81(result1);
> printf("%s\n", *utf81);
> return 0;
> }
> int main(int argc, char* argv[]) {
>
> // Get the default Isolate created at startup.
> Isolate* isolate = Isolate::New();;
> if(isolate == NULL){
> printf("Error");
> return 0;
> }
> Isolate::Scope isolate_scope(isolate);
> // Create a stack-allocated handle scope.
> HandleScope handle_scope(isolate);
> // Create a new context.
> Handle<Context> context = Context::New(isolate);
> // Enter the context for compiling and running the hello world script.
> Context::Scope context_scope(context);
> // Create a string containing the JavaScript source code.
> pthread_t thread_id;
> pthread_create(&thread_id, NULL, &threadFunction,NULL);
> Handle<String> source = String::NewFromUtf8(isolate, "'Hello' + ',
> World!'");
> // Compile the source code.
> Handle<Script> script = Script::Compile(source);
> // Run the script to get the result.
> Handle<Value> result = script->Run();
> // Convert the result to an UTF8 string and print it.
> String::Utf8Value utf8(result);
> printf("%s\n", *utf8);
> return 0;
> }
>
>
> and the command i used to compile,
> g++ -Iinclude Two_threads.cpp -o Two_threads -Wl,--start-group
> out/native/obj.target/{tools/gyp/libv8_{base.ia32,snapshot},third_party/icu/libicu{uc,i18n,data}}.a
>
> -Wl,--end-group -lrt
> and to execute it:
> ./Two_threads
>
> the output is:
> Hello, World!
>
>
> On Fri, Jan 31, 2014 at 1:49 PM, Kevin Ingwersen
> <ingwi...@googlemail.com<javascript:>
> > wrote:
>
>> He was just saying that you need to create one isolate for each new
>> thread, so that you can make a context in each thread. With that, the
>> threads can run independent from the other :) So you need to make it so,
>> that thread1 has an own isolate, thread2 has an own isolate, and so on and
>> so forth. :3
>> Am Fr. Jan. 31 2014 22:27:04 schrieb Sara Abdelhameed:
>>
>> Sorry, I don't get what you exactly meant, did you mean I create for
>> every thread including the main thread and enter them using an isolate
>> scope? or what I didn't understand "(at least on all but the main
>> threads) "?
>>
>> Thank you in advance :)
>>
>>
>> On Fri, Jan 31, 2014 at 11:15 PM, Jochen Eisinger
>> <joc...@chromium.org<javascript:>
>> > wrote:
>>
>>> Instead of using Isolate::GetCurrent() you have to create the isolates
>>> explicitly (at least on all but the main threads) and enter them, e.g.
>>> using an isolate scope.
>>>
>>> best
>>> -jochen
>>>
>>>
>>> On Fri, Jan 31, 2014 at 10:09 PM, Sara Abdelhameed <
>>> saraabdel...@gmail.com <javascript:>> wrote:
>>>
>>>> I have tried these but it wasn't working with me,
>>>> The code is:
>>>> #include <v8.h>
>>>> #include <pthread.h>
>>>> using namespace v8;
>>>> void* threadFunction(void*){
>>>> Isolate *isolate1 = Isolate::GetCurrent();
>>>> HandleScope handle_scope1(isolate1);
>>>> Handle<Context> context1 = Context::New(isolate1);
>>>> Context::Scope context_scope1(context1);
>>>> Handle<String> source1 = String::NewFromUtf8(isolate1, "'Hi' + ',
>>>> Sara'");
>>>> Handle<Script> script1 = Script::Compile(source1);
>>>> Handle<Value> result1 = script1->Run();
>>>> String::Utf8Value utf81(result1);
>>>> printf("%s\n", *utf81);
>>>> return 0;
>>>> }
>>>> int main(int argc, char* argv[]) {
>>>> Isolate* isolate = Isolate::GetCurrent();
>>>> HandleScope handle_scope(isolate);
>>>> Handle<Context> context = Context::New(isolate);
>>>> Context::Scope context_scope(context);
>>>> pthread_t thread_id;
>>>> pthread_create(&thread_id, NULL, &threadFunction,NULL);
>>>> Handle<String> source = String::NewFromUtf8(isolate, "'Hello' + ',
>>>> World!'");
>>>> Handle<Script> script = Script::Compile(source);
>>>> Handle<Value> result = script->Run();
>>>> String::Utf8Value utf8(result);
>>>> printf("%s\n", *utf8);
>>>> return 0;
>>>> }
>>>>
>>>> and the command that I used to compile is
>>>> g++ -Iinclude Two_threads.cpp -o Two_threads -Wl,--start-group
>>>> out/native/obj.target/{tools/gyp/libv8_{base.ia32,snapshot},third_party/icu/libicu{uc,i18n,data}}.a
>>>>
>>>> -Wl,--end-group -lrt
>>>> and to execute is
>>>> ./Two_threads
>>>>
>>>> it was compiled without giving me any error but when I executed it i
>>>> printed only hello world! "the javascript string of the main thread" and
>>>> didn't print hi,Sara the javascript string of the single thread I have in
>>>> the code.
>>>>
>>>> So, what is the problem? or what ?
>>>>
>>>> Thank you in advance
>>>>
>>>>
>>>>
>>>> On Fri, Jan 31, 2014 at 11:45 AM, Sara Abdelhameed <
>>>> saraabdel...@gmail.com <javascript:>> wrote:
>>>>
>>>>> Thank you, and I'll try that now, wish it work with me.
>>>>>
>>>>>
>>>>> On Fri, Jan 31, 2014 at 9:40 PM, Dmitry Lomov
>>>>> <dsl...@chromium.org<javascript:>
>>>>> > wrote:
>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Fri, Jan 31, 2014 at 11:38 AM, Sara Abdelhameed <
>>>>>> saraabdel...@gmail.com <javascript:>> wrote:
>>>>>>
>>>>>>> so, if I want to make very simple example such as having two threads
>>>>>>> that each one run different script and don't depend on each other, and
>>>>>>> I
>>>>>>> want them to be in parallel, so I must use two isolate, for every
>>>>>>> thread
>>>>>>> there is one isolate and no need to use lock as the scripts are
>>>>>>> different
>>>>>>> and independent from each other. is this right?
>>>>>>>
>>>>>>
>>>>>> Yes that is correct.
>>>>>>
>>>>>>
>>>>>>>
>>>>>>> On Friday, January 31, 2014 11:23:28 AM UTC+2, Jochen Eisinger wrote:
>>>>>>>
>>>>>>>> There are two options: (1) use different isolates on each thread
>>>>>>>> (then the scripts can run in parallel) and (2) use one isolate and use
>>>>>>>> v8::Locker to lock the isolate before you use it (then only one thread
>>>>>>>> at a
>>>>>>>> time can execute scripts)
>>>>>>>>
>>>>>>>> best
>>>>>>>> -jochen
>>>>>>>>
>>>>>>>>
>>>>>>>> On Fri, Jan 31, 2014 at 9:51 AM, Sara Abdelhameed <
>>>>>>>> saraabdel...@gmail.com> wrote:
>>>>>>>>
>>>>>>>>> Hello all,
>>>>>>>>> does v8 engine support multithreaded application ? and could I run
>>>>>>>>> two different javascript code in two different threads at the same
>>>>>>>>> time ?
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>>
>>>>>>>>
>>
>>
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