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Try to explain the SheepShaver globals

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gbeauche 2004-11-22 21:50:45 +00:00
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SheepShaver/src/include/thunks.h
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@ -85,6 +85,22 @@ extern uint32 NativeRoutineDescriptor(int selector);
/*
* Helpers to share 32-bit addressable data with MacOS
*
* There are two distinct allocatable regions:
*
* - The Data region is used to share data between MacOS and
* SheepShaver. This is stack-like allocation since it is
* meant to only hold temporary data which dies at the end
* of the current function scope.
*
* - The Procedure region is used to hold permanent M68K or
* PowerPC code to assist native routine implementations.
*
* - The Procedure region grows up whereas the Data region
* grows down. They may intersect into the ZeroPage, which
* is a read-only page with all bits set to zero. In practise,
* the intersection is unlikely since the Procedure region is
* static and the Data region is meant to be small (< 256 KB).
*/
class SheepMem {