26 lines
482 B
C
26 lines
482 B
C
#include "threadimpl.h"
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void
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makecontext(ucontext_t *ucp, void (*func)(void), int argc, ...)
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{
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ulong *sp, *tos;
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va_list arg;
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if(argc != 2)
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sysfatal("libthread: makecontext misused");
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sp = USPALIGN(ucp, 16);
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ucp->mc.pc = (long)func;
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ucp->mc.sp = (long)sp;
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va_start(arg, argc);
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ucp->mc.r3 = va_arg(arg, long);
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ucp->mc.r4 = va_arg(arg, long);
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va_end(arg);
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}
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int
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swapcontext(ucontext_t *oucp, ucontext_t *ucp)
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{
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if(getcontext(oucp) == 0)
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setcontext(ucp);
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return 0;
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}
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