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pCallerA pointer to the controlling IUnknown interface of the calling ActiveX component, if the caller is an ActiveX component. If the calling application is not an ActiveX component, this value can be set to NULL. Otherwise, the caller is a COM object that is contained in another component, such as an ActiveX control in the context of an HTML page. This parameter represents the outermost IUnknown of the calling component. The function attempts the download in the context of the ActiveX client framework, and allows the caller container to receive callbacks on the progress of the download.
If simulate_infinite_loop is true, the function will throw an exception in order to stop execution of the caller. This will lead to the main loop being entered instead of code after the call to emscripten_set_main_loop() being run, which is the closest we can get to simulating an infinite loop (we do something similar in glutMainLoop in GLUT). If this parameter is false, then the behavior is the same as it was before this parameter was added to the API, which is that execution continues normally. Note that in both cases we do not run global destructors, atexit, etc., since we know the main loop will still be running, but if we do not simulate an infinite loop then the stack will be unwound. That means that if simulate_infinite_loop is false, and you created an object on the stack, it will be cleaned up before the main loop is called for the first time.
Starts and asyncronous dlopen operation to load a shared library from afilename or URL. Returns immediately and requires the caller to return to theevent loop. The onsuccess and onerror callbacks are used to signalsuccess or failure of the request. Upon onerror callback the normaldlerror C function can be used get the error details. The flags are thesame as those used in the normal dlopen C function.
As you see, the nm tool uses the first notation (const after the type). Also, note that the only constness that is exported, and matters for the caller, is whether the function will modify the element pointed by the pointer or not. The constness of the pointer itself is irrelevant for the caller since the pointer itself is always passed as a copy. The function can only make its own copy of the pointer to point to somewhere else, which is irrelevant for the caller. 2b1af7f3a8