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#include "EXTERN.h" |
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#include "perl.h" |
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#include "XSUB.h" |
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|
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struct coro { |
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U8 dowarn; |
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|
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PERL_SI *curstackinfo; |
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AV *curstack; |
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AV *mainstack; |
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SV **stack_sp; |
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OP *op; |
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SV **curpad; |
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SV **stack_base; |
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SV **stack_max; |
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SV **tmps_stack; |
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I32 tmps_floor; |
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I32 tmps_ix; |
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I32 tmps_max; |
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I32 *markstack; |
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I32 *markstack_ptr; |
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I32 *markstack_max; |
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I32 *scopestack; |
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I32 scopestack_ix; |
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I32 scopestack_max; |
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ANY *savestack; |
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I32 savestack_ix; |
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I32 savestack_max; |
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OP **retstack; |
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I32 retstack_ix; |
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I32 retstack_max; |
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COP *curcop; |
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|
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AV *defav; |
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|
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SV *proc; |
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}; |
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|
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typedef struct coro *Coro__State; |
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typedef struct coro *Coro__State_or_hashref; |
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|
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#define SAVE(c) \ |
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c->dowarn = PL_dowarn; \ |
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c->curstackinfo = PL_curstackinfo; \ |
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c->curstack = PL_curstack; \ |
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c->mainstack = PL_mainstack; \ |
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c->stack_sp = PL_stack_sp; \ |
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c->op = PL_op; \ |
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c->curpad = PL_curpad; \ |
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c->stack_base = PL_stack_base; \ |
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c->stack_max = PL_stack_max; \ |
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c->tmps_stack = PL_tmps_stack; \ |
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c->tmps_floor = PL_tmps_floor; \ |
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c->tmps_ix = PL_tmps_ix; \ |
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c->tmps_max = PL_tmps_max; \ |
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c->markstack = PL_markstack; \ |
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c->markstack_ptr = PL_markstack_ptr; \ |
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c->markstack_max = PL_markstack_max; \ |
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c->scopestack = PL_scopestack; \ |
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c->scopestack_ix = PL_scopestack_ix; \ |
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c->scopestack_max = PL_scopestack_max;\ |
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c->savestack = PL_savestack; \ |
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c->savestack_ix = PL_savestack_ix; \ |
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c->savestack_max = PL_savestack_max; \ |
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c->retstack = PL_retstack; \ |
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c->retstack_ix = PL_retstack_ix; \ |
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c->retstack_max = PL_retstack_max; \ |
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c->curcop = PL_curcop; \ |
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c->defav = GvAV (PL_defgv); |
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|
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#define LOAD(c) \ |
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PL_dowarn = c->dowarn; \ |
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PL_curstackinfo = c->curstackinfo; \ |
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PL_curstack = c->curstack; \ |
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PL_mainstack = c->mainstack; \ |
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PL_stack_sp = c->stack_sp; \ |
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PL_op = c->op; \ |
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PL_curpad = c->curpad; \ |
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PL_stack_base = c->stack_base; \ |
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PL_stack_max = c->stack_max; \ |
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PL_tmps_stack = c->tmps_stack; \ |
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PL_tmps_floor = c->tmps_floor; \ |
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PL_tmps_ix = c->tmps_ix; \ |
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PL_tmps_max = c->tmps_max; \ |
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PL_markstack = c->markstack; \ |
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PL_markstack_ptr = c->markstack_ptr; \ |
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PL_markstack_max = c->markstack_max; \ |
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PL_scopestack = c->scopestack; \ |
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PL_scopestack_ix = c->scopestack_ix; \ |
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PL_scopestack_max = c->scopestack_max;\ |
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PL_savestack = c->savestack; \ |
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PL_savestack_ix = c->savestack_ix; \ |
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PL_savestack_max = c->savestack_max; \ |
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PL_retstack = c->retstack; \ |
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PL_retstack_ix = c->retstack_ix; \ |
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PL_retstack_max = c->retstack_max; \ |
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PL_curcop = c->curcop; \ |
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GvAV (PL_defgv) = c->defav; |
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|
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/* this is an EXACT copy of S_nuke_stacks in perl.c, which is unfortunately static */ |
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STATIC void |
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S_nuke_stacks(pTHX) |
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{ |
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while (PL_curstackinfo->si_next) |
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PL_curstackinfo = PL_curstackinfo->si_next; |
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while (PL_curstackinfo) { |
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PERL_SI *p = PL_curstackinfo->si_prev; |
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/* curstackinfo->si_stack got nuked by sv_free_arenas() */ |
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Safefree(PL_curstackinfo->si_cxstack); |
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Safefree(PL_curstackinfo); |
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PL_curstackinfo = p; |
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} |
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Safefree(PL_tmps_stack); |
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Safefree(PL_markstack); |
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Safefree(PL_scopestack); |
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Safefree(PL_savestack); |
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Safefree(PL_retstack); |
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} |
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|
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MODULE = Coro::State PACKAGE = Coro::State |
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|
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PROTOTYPES: ENABLE |
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|
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Coro::State |
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newprocess(proc) |
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SV * proc |
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PROTOTYPE: & |
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CODE: |
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Coro__State coro; |
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|
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New (0, coro, 1, struct coro); |
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|
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coro->mainstack = 0; /* actual work is done inside transfer */ |
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coro->proc = SvREFCNT_inc (proc); |
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|
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RETVAL = coro; |
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OUTPUT: |
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RETVAL |
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|
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void |
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transfer(prev,next) |
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Coro::State_or_hashref prev |
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Coro::State_or_hashref next |
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CODE: |
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|
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if (prev != next) |
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{ |
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PUTBACK; |
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SAVE (prev); |
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|
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/* |
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* this could be done in newprocess which would to |
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* extremely elegant and fast (just PUTBACK/SAVE/LOAD/SPAGAIN) |
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* code here, but lazy allocation of stacks has also |
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* some virtues and the overhead of the if() is nil. |
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*/ |
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if (next->mainstack) |
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{ |
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LOAD (next); |
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next->mainstack = 0; /* unnecessary but much cleaner */ |
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SPAGAIN; |
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} |
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else |
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{ |
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/* |
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* emulate part of the perl startup here. |
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*/ |
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UNOP myop; |
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|
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init_stacks (); |
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PL_op = (OP *)&myop; |
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/*PL_curcop = 0;*/ |
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GvAV (PL_defgv) = newAV (); |
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|
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SPAGAIN; |
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Zero(&myop, 1, UNOP); |
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myop.op_next = Nullop; |
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myop.op_flags = OPf_WANT_VOID; |
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|
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EXTEND (SP,1); |
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PUSHs (next->proc); |
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|
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PUTBACK; |
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/* |
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* the next line is slightly wrong, as PL_op->op_next |
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* is actually being executed so we skip the first op |
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* that doens't matter, though, since it is only |
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* pp_nextstate and we never return... |
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*/ |
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PL_op = Perl_pp_entersub(aTHX); |
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SPAGAIN; |
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|
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ENTER; |
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} |
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} |
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|
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void |
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DESTROY(coro) |
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Coro::State coro |
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CODE: |
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|
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if (coro->mainstack) |
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{ |
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struct coro temp; |
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|
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PUTBACK; |
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SAVE((&temp)); |
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LOAD(coro); |
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|
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S_nuke_stacks (); |
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SvREFCNT_dec ((SV *)GvAV (PL_defgv)); |
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|
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LOAD((&temp)); |
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SPAGAIN; |
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} |
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|
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SvREFCNT_dec (coro->proc); |
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Safefree (coro); |
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|
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|
