Hi All,
Whenever I get asynchronous events, I am calling Javascript callback
functions from C++ as described in the attached sample code.
>From the given sample code, I have written two functions in C++(i.e. *
myServerNotification_1* and *myServerNotification_2*), for calling same JS
callback function (i.e *notificationReceived*) with different argument
values on two different events.
In my application asynchronous events will come frequently and by using this
approach it is working fine sometimes and sometimes its giving error like
"Illegal opcode" or "caught signal 4 segmentation fault".
Can you please suggest me whether this approach is proper or not? If so
could you please suggest me where I am making mistake in the given sample
code.
or Is there any better approach other than which I mentioned above for
calling JS callback functions from C++ in webkit ?
We are using Webkit GTK port version 1.1.1 and the platform is ARM
Thanks in Advance.
Thanks,
Anil.V
int myServerNotification_1(unsigned char *mydata)
{
JSStringRef jsEmptyIString;
JSValueRef exception = 0x00;
JSStringRef functionName = JSStringCreateWithUTF8CString("notificationReceived");
WebkitWebFrame *frame_myserver = webkit_web_view_get_main_frame (WEBKIT_WEB_VIEW (web_view));
JSGlobalContextRef jsCtx = webkit_web_frame_get_global_context (frame_myserver);
JSValueRef jsArgs[2];
jsArgs[0] = JSValueMakeNumber(jsCtx,3);
JSValueRef functionValue = JSObjectGetProperty(jsCtx, JSContextGetGlobalObject(jsCtx), functionName, &exception);
JSStringRelease(functionName);
if( exception )
{
fprintf(stderr,"\n Exception occured in %s at %d \n",__FILE__,__LINE__);
return 0;
}
jsEmptyIString = JSStringCreateWithUTF8CString((const char *)mydata);
jsArgs[1] = JSValueMakeString(jsCtx, jsEmptyIString);
JSStringRelease(jsEmptyIString);
JSObjectRef jsFunctionObject = JSValueToObject(jsCtx, functionValue, &exception);
if( exception )
{
fprintf(stderr,"\n Excepion occured in %s at %d \n",__FILE__,__LINE__);
return 0;
}
JSObjectCallAsFunction(jsCtx,jsFunctionObject, NULL, 2, jsArgs, &exception);
if( exception )
{
fprintf(stderr,"\n Exception occured while calling the JS CallBack function \n");
return 0;
}
}
int myServerNotification_2(unsigned char *mydata)
{
JSStringRef jsEmptyIString;
JSValueRef exception = 0x00;
JSStringRef functionName = JSStringCreateWithUTF8CString("notificationReceived");
WebkitWebFrame *frame_myserver = webkit_web_view_get_main_frame (WEBKIT_WEB_VIEW (web_view));
JSGlobalContextRef jsCtx = webkit_web_frame_get_global_context (frame_myserver);
//JSGlobalContextRef jsCtx = js_context_reg;
JSValueRef jsArgs[2];
jsArgs[0] = JSValueMakeNumber(jsCtx,3);
JSValueRef functionValue = JSObjectGetProperty(jsCtx, JSContextGetGlobalObject(jsCtx), functionName, &exception);
JSStringRelease(functionName);
if( exception )
{
fprintf(stderr,"\n Exception occured in %s at %d \n",__FILE__,__LINE__);
return 0;
}
jsEmptyIString = JSStringCreateWithUTF8CString((const char *)mydata);
jsArgs[1] = JSValueMakeString(jsCtx, jsEmptyIString);
JSStringRelease(jsEmptyIString);
JSObjectRef jsFunctionObject = JSValueToObject(jsCtx, functionValue, &exception);
if( exception )
{
fprintf(stderr,"\n Excepion occured in %s at %d \n",__FILE__,__LINE__);
return 0;
}
JSObjectCallAsFunction(jsCtx,jsFunctionObject, NULL, 2, jsArgs, &exception);
if( exception )
{
fprintf(stderr,"\n Exception occured while calling the JS CallBack function \n");
return 0;
}
}
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