ref: 00c219c7d9c2b9f60c2db0e1ba7289b2301209a7 dir: /lib9/lock-Nt-386.c/
#include "lib9.h" int _tas(int *la) { int v; _asm { mov eax, la mov ebx, 1 xchg ebx, [eax] mov v, ebx } return v; }