I can't run sample code, return JsErrorNoCurrentContext

[fettliu]

this file in "@ubuntu:~/github/ChakraCore/BuildLinux/Release/bin/ChakraCore"

#include "../../../../lib/Jsrt/ChakraCore.h"
#include <iostream>
#include <string>
#include <stdio.h>
#include <locale>
#include <codecvt>

using namespace std;



const std::wstring utf82ws(const std::string& src)
{
    std::wstring_convert<std::codecvt_utf8<wchar_t> > conv;
    return conv.from_bytes(src);
}

int print_err()
{
    JsValueRef err;
    if(JsNoError == JsGetAndClearException(&err))
    {
        JsValueRef errstr;
        if(JsNoError == JsConvertValueToString(err, &errstr))
        {
            char* output1;
            size_t outputLength;
            if(JsNoError == JsStringToPointerUtf8Copy(errstr, &output1, &outputLength))
            {
                wcout << utf82ws(output1) << endl;
                printf(output1);
            }
        }
    }
    return 1;

}

int main()
{
    JsRuntimeHandle runtime;
    JsContextRef context;
    JsValueRef result;
    unsigned currentSourceContext = 0;

    // Your script; try replace hello-world with something else
    string script = "(function(){return \'Hello world!\';})()";

    // Create a runtime. 
    if(JsNoError != JsCreateRuntime(JsRuntimeAttributeNone, nullptr, &runtime))
        return print_err();

    // Create an execution context. 
    if(JsNoError != JsCreateContext(runtime, &context))
        return print_err();

    // Now set the current execution context.
    if(JsNoError != JsSetCurrentContext(context))
        return print_err();

    // Run the script.
    auto ec = JsRunScriptUtf8(script.c_str(), currentSourceContext++, "", &result);
    if(ec != JsErrorCode::JsNoError)
    {
        print_err();
        return 1;
    }

    JsValueRef resultJSString;
    JsConvertValueToString(result, &resultJSString);
    if(ec != JsErrorCode::JsNoError)
    {
        print_err();
        return 1;
    }

    // Project script result back to C++.
    char* output;
    size_t outputLength;
    JsStringToPointerUtf8Copy(resultJSString, &output, &outputLength);

    string resultW(output);
    //cout << string(resultW.begin(), resultW.end()) << endl;
    printf(output);
    system("pause");

    // Dispose runtime
    JsSetCurrentContext(JS_INVALID_REFERENCE);
    JsDisposeRuntime(runtime);

return 0;
}

at JsRunScriptUtf8
return JsErrorNoCurrentContext

btw: pls support centos7.

[fettliu]

The same code run successful at vs2015, only cut off Utf8 of JsXxxxxUtf8 and convert string to wstring or wchar_t.

[obastemur]

btw: pls support centos7.

ChakraCore runs on Fedora. Should be running on centos too.

[obastemur]

@FettLuo static or dynamic lib? could you please share the steps in detail?

[fettliu]

@obastemur ubuntu server 16.10 on HyperV on my SurfacePro3. ChakraCore is dynamic lib(so).
build use clang++ test.cpp -std=c++11 -g -lChakraCore.

[obastemur]

Shared library requires an explicit call to DllMain. See https://github.com/Microsoft/Chakra-Samples/blob/master/ChakraCore%20Samples/Hello%20World/Python/helloWorld.py#L24-L28

[fettliu]

1. I use c++, not python. :( , I don't known how to call DllMain in c++ in linux.
2. Not call DllMain in Linux_OSX sample in c++.

BTW:Manual call DllMain that not enough smart in linux. best auto call DllMain at first call CreateRuntime internal.

[obastemur]

@FettLuo why don't you use static library on xplat?

[fettliu]

@obastemur
I don't know much about ChakraCore static libraries used, intuition is a dynamic library simpler.
Also, I hope my main program in Windows and Linux have the same characteristics, that is dynamically loaded jsrt.

Documentation on using statically linked libraries?

[obastemur]

@FettLuo I agree the DllMain call requirement is ugly.

Opened an issue (#1811) to track that.

Static library usage sample:

https://github.com/Microsoft/Chakra-Samples/tree/master/ChakraCore%20Samples/Hello%20World/Linux_OSX

[fettliu]

Hope can be directly compiled in Centos. CentOS has a lot of users in China.
Want to extract the header files needed by the third party to a separate Directory, do not include the source code.

[obastemur]

Hope can be directly compiled in Centos.

See #1312 for Fedora steps. Shouldn't be so different.

@liminzhu , what do you think about adding those on docs ?