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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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typedef struct coro { |
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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_base; |
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SV **stack_sp; |
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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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|
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SV *proc; |
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} *Coro; |
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|
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#define SAVE(c) \ |
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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_base = PL_stack_base; \ |
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c->stack_sp = PL_stack_sp; \ |
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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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|
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#define LOAD(c) \ |
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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_base = c->stack_base; \ |
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PL_stack_sp = c->stack_sp; \ |
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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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|
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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 PACKAGE = Coro |
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|
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PROTOTYPES: ENABLE |
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|
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Coro |
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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 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(old,new) |
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Coro old |
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Coro new |
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CODE: |
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|
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PUTBACK; |
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SAVE (old); |
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|
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if (new->mainstack) /* this is, in theory, unnecessary overhead */ |
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{ |
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LOAD (new); |
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SPAGAIN; |
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} |
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else |
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{ |
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init_stacks (); |
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|
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SPAGAIN; |
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PUSHMARK(SP); |
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PUTBACK; |
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call_sv (new->proc, G_VOID | G_DISCARD | G_EVAL); |
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|
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exit (0); |
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|
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/*SPAGAIN; |
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SAVE (new); |
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|
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LOAD (old); |
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SPAGAIN;*/ |
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} |
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|
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void |
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DESTROY(coro) |
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Coro 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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S_nuke_stacks (); |
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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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