Instead of rebooting, is there a way to hibernate and switch to your other OS?

I'm planning on building a hackintosh but am wondering if there's a way around needing to fully reboot every time you want to run your dual boot setup?

So for example, not having to shutdown when you have a lot going on on your Mac desktop - hibernating it and then booting straight into Windows, and when you don't want to close everything there, hibernating Windows and resuming Mac?

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Anyone successfully done this before?