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#include "threadimpl.h"
#include "BSD.c"
/*
* FreeBSD 4 and earlier needs the context functions.
*/
void
makecontext(ucontext_t *ucp, void (*func)(void), int argc, ...)
{
int *sp;
sp = (int*)ucp->uc_stack.ss_sp+ucp->uc_stack.ss_size/4;
sp -= argc;
memmove(sp, &argc+1, argc*sizeof(int));
*--sp = 0; /* return address */
ucp->uc_mcontext.mc_eip = (long)func;
ucp->uc_mcontext.mc_esp = (int)sp;
}
extern int getmcontext(mcontext_t*);
extern int setmcontext(mcontext_t*);
int
getcontext(ucontext_t *uc)
{
return getmcontext(&uc->uc_mcontext);
}
void
setcontext(ucontext_t *uc)
{
setmcontext(&uc->uc_mcontext);
}
int
swapcontext(ucontext_t *oucp, ucontext_t *ucp)
{
if(getcontext(oucp) == 0)
setcontext(ucp);
return 0;
}
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