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According to the Windows DDK header files, KSPIN_LOCK is defined like this: typedef ULONG_PTR KSPIN_LOCK; From basetsd.h (SDK, Feb. 2003): typedef [public] unsigned __int3264 ULONG_PTR, *PULONG_PTR; typedef unsigned __int64 ULONG_PTR, *PULONG_PTR; typedef _W64 unsigned long ULONG_PTR, *PULONG_PTR; The keyword __int3264 specifies an integral type that has the following properties: + It is 32-bit on 32-bit platforms + It is 64-bit on 64-bit platforms + It is 32-bit on the wire for backward compatibility. It gets truncated on the sending side and extended appropriately (signed or unsigned) on the receiving side. Thus register_t seems the proper mapping onto FreeBSD for spin locks. |
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