Init function with GetSampleRate()

Where VST functions like GetSampleRate(), GetSamplesPerBeat() are available for all hosts?

I see this function is not available on Reset() or OnParamChange() to all hosts. Cubase for example return real value of this function only in ProcessDoubleReplacing(). To solve this problem I build a Init() function like this:

Code:

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//in IPLUG_CTOR

sbeat=0.;


void Init() {
///// here can safe access GetSampleRate() or GetSamplesPerBeat
        srate = GetSampleRate();
        sbeat = 4*GetSamplesPerBeat();
}
Reset() {
        TRACE;
        IMutexLock lock(this);

        if (sbeat<1.) {
                this->Init();
        }
}
OnParamChange() {
        TRACE;
        IMutexLock lock(this);

        if (sbeat<1.) {
                this->Init();
        }
}
ProcessDoubleReplacing() {
        TRACE;
        IMutexLock lock(this);

        if (sbeat<1.) {
                this->Init();
        }
}

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There is no other solution ? What do you use to get safe values of this functions for all hosts?

Init function with GetSampleRate()