/*
* So, we need to get back to where we came from. This can happen in two
* different ways:
* 1) PCC_MLCONT is set, in which case we need to go to the mainloop
* 2) It is not set, and we simply jump to pcc_uc_ret.
*/
void
puffs_cc_yield(struct puffs_cc *pcc)
{
struct puffs_cc *jumpcc;
int rv;
assert(puffs_fakecc == 0);
pcc->pcc_flags &= ~PCC_BORROWED;
/* romanes eunt domus */
DPRINTF(("puffs_cc_yield: "));
if ((pcc->pcc_flags & PCC_MLCONT) == 0) {
DPRINTF(("no mlcont, pcc %p\n", pcc));
swapcontext(&pcc->pcc_uc, &pcc->pcc_uc_ret);
} else {
DPRINTF(("mlcont, pcc %p\n", pcc));
pcc->pcc_flags &= ~PCC_MLCONT;
rv = puffs__cc_create(pcc->pcc_pu, puffs__theloop, &jumpcc);
if (rv)
abort(); /* p-p-p-pa-pa-panic (XXX: fixme) */
swapcontext(&pcc->pcc_uc, &jumpcc->pcc_uc);
DPRINTF(("puffs_cc_yield: post swap pcc %p\n", pcc));
}
}
/* public, but not really tested and only semi-supported */
int
puffs_dispatch_create(struct puffs_usermount *pu, struct puffs_framebuf *pb,
struct puffs_cc **pccp)
{
struct puffs_cc *pcc;
if (puffs__cc_create(pu, dispatch, &pcc) == -1)
return -1;
pcc->pcc_pb = pb;
*pccp = pcc;
return 0;
}