[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.4 by root, Tue Jul 17 02:21:56 2001 UTC vs.
Revision 1.27 by root, Mon Aug 20 16:58:19 2001 UTC

…		…
1	#include "EXTERN.h"	1	#include "EXTERN.h"
2	#include "perl.h"	2	#include "perl.h"
3	#include "XSUB.h"	3	#include "XSUB.h"
4		4
5	#if 0	5	#include "libcoro/coro.c"
6	# define CHK(x) (void *)0	6
		7	#include <signal.h>
		8
		9	#ifdef HAVE_MMAP
		10	# include <unistd.h>
		11	# include <sys/mman.h>
		12	# ifndef MAP_ANON
		13	# ifdef MAP_ANONYMOUS
		14	# define MAP_ANON MAP_ANONYMOUS
7	#else	15	# else
8	# define CHK(x) if (!(x)) croak("FATAL, CHK: " #x)	16	# undef HAVE_MMAP
		17	# endif
		18	# endif
9	#endif	19	#endif
10		20
		21	#define MAY_FLUSH /* increases codesize */
		22
		23	#define SUB_INIT "Coro::State::initialize"
		24	#define UCORO_STATE "_coro_state"
		25
		26	/* The next macro should delcare a variable stacklevel that contains and approximation
		27	* to the current C stack pointer. Its property is that it changes with each call
		28	* and should be unique. */
		29	#define dSTACKLEVEL void *stacklevel = &stacklevel
		30
		31	#define labs(l) ((l) >= 0 ? (l) : -(l))
		32
		33	#include "CoroAPI.h"
		34
		35	static struct CoroAPI coroapi;
		36
		37	/* this is actually not only the c stack but also c registers etc... */
		38	typedef struct {
		39	int refcnt; /* pointer reference counter */
		40	int usecnt; /* shared by how many coroutines */
		41	int gencnt; /* generation counter */
		42
		43	coro_context cctx;
		44
		45	void *sptr;
		46	long ssize; /* positive == mmap, otherwise malloc */
		47	} coro_stack;
		48
11	struct coro {	49	struct coro {
		50	/* the optional C context */
		51	coro_stack *stack;
		52	void *cursp;
		53	int gencnt;
		54
		55	/* optionally saved, might be zero */
		56	AV *defav;
		57	SV *defsv;
		58	SV *errsv;
		59
		60	/* saved global state not related to stacks */
12	U8 dowarn;	61	U8 dowarn;
13	AV *defav;	62	I32 in_eval;
14		63
		64	/* the stacks and related info (callchain etc..) */
15	PERL_SI *curstackinfo;	65	PERL_SI *curstackinfo;
16	AV *curstack;	66	AV *curstack;
17	AV *mainstack;	67	AV *mainstack;
18	SV **stack_sp;	68	SV **stack_sp;
19	OP *op;	69	OP *op;
35	I32 savestack_max;	85	I32 savestack_max;
36	OP **retstack;	86	OP **retstack;
37	I32 retstack_ix;	87	I32 retstack_ix;
38	I32 retstack_max;	88	I32 retstack_max;
39	COP *curcop;	89	COP *curcop;
		90	JMPENV *top_env;
40		91
		92	/* data associated with this coroutine (initial args) */
41	AV *args;	93	AV *args;
42	};	94	};
43		95
44	typedef struct coro *Coro__State;	96	typedef struct coro *Coro__State;
45	typedef struct coro *Coro__State_or_hashref;	97	typedef struct coro *Coro__State_or_hashref;
46		98
		99	static AV main_mainstack; / used to differentiate between $main and others */
		100	static HV *coro_state_stash;
		101	static SV *ucoro_state_sv;
		102	static U32 ucoro_state_hash;
47	static HV *padlist_cache;	103	static HV *padlist_cache;
48		104
49	/* mostly copied from op.c:cv_clone2 */	105	/* mostly copied from op.c:cv_clone2 */
50	STATIC AV *	106	STATIC AV *
51	clone_padlist (AV *protopadlist)	107	clone_padlist (AV *protopadlist)
…		…
115	SvPADTMP_on (sv);	171	SvPADTMP_on (sv);
116	npad[ix] = sv;	172	npad[ix] = sv;
117	}	173	}
118	}	174	}
119		175
120	#if 0 /* NONOTUNDERSTOOD */	176	#if 0 /* return -ENOTUNDERSTOOD */
121	/* Now that vars are all in place, clone nested closures. */	177	/* Now that vars are all in place, clone nested closures. */
122		178
123	for (ix = fpad; ix > 0; ix--) {	179	for (ix = fpad; ix > 0; ix--) {
124	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	180	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
125	if (namesv	181	if (namesv
…		…
138	#endif	194	#endif
139		195
140	return newpadlist;	196	return newpadlist;
141	}	197	}
142		198
143	STATIC AV *	199	#ifdef MAY_FLUSH
		200	STATIC void
144	free_padlist (AV *padlist)	201	free_padlist (AV *padlist)
145	{	202	{
146	/* may be during global destruction */	203	/* may be during global destruction */
147	if (SvREFCNT(padlist))	204	if (SvREFCNT(padlist))
148	{	205	{
…		…
156	}	213	}
157		214
158	SvREFCNT_dec((SV*)padlist);	215	SvREFCNT_dec((SV*)padlist);
159	}	216	}
160	}	217	}
		218	#endif
161		219
162	/* the next tow functions merely cache the padlists */	220	/* the next two functions merely cache the padlists */
163	STATIC void	221	STATIC void
164	get_padlist (CV *cv)	222	get_padlist (CV *cv)
165	{	223	{
166	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);	224	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);
167		225
…		…
183	}	241	}
184		242
185	av_push ((AV )he, (SV *)CvPADLIST (cv));	243	av_push ((AV )he, (SV *)CvPADLIST (cv));
186	}	244	}
187		245
		246	#ifdef MAY_FLUSH
		247	STATIC void
		248	flush_padlist_cache ()
		249	{
		250	HV *hv = padlist_cache;
		251	padlist_cache = newHV ();
		252
		253	if (hv_iterinit (hv))
		254	{
		255	HE *he;
		256	AV *padlist;
		257
		258	while (!!(he = hv_iternext (hv)))
		259	{
		260	AV av = (AV )HeVAL(he);
		261
		262	/* casting is fun. */
		263	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		264	free_padlist (padlist);
		265	}
		266	}
		267
		268	SvREFCNT_dec (hv);
		269	}
		270	#endif
		271
		272	#define SB do {
		273	#define SE } while (0)
		274
		275	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
		276	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
		277
		278	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
		279
188	static void	280	static void
189	SAVE(pTHX_ Coro__State c)	281	load_state(pTHX_ Coro__State c)
		282	{
		283	PL_dowarn = c->dowarn;
		284	PL_in_eval = c->in_eval;
		285
		286	PL_curstackinfo = c->curstackinfo;
		287	PL_curstack = c->curstack;
		288	PL_mainstack = c->mainstack;
		289	PL_stack_sp = c->stack_sp;
		290	PL_op = c->op;
		291	PL_curpad = c->curpad;
		292	PL_stack_base = c->stack_base;
		293	PL_stack_max = c->stack_max;
		294	PL_tmps_stack = c->tmps_stack;
		295	PL_tmps_floor = c->tmps_floor;
		296	PL_tmps_ix = c->tmps_ix;
		297	PL_tmps_max = c->tmps_max;
		298	PL_markstack = c->markstack;
		299	PL_markstack_ptr = c->markstack_ptr;
		300	PL_markstack_max = c->markstack_max;
		301	PL_scopestack = c->scopestack;
		302	PL_scopestack_ix = c->scopestack_ix;
		303	PL_scopestack_max = c->scopestack_max;
		304	PL_savestack = c->savestack;
		305	PL_savestack_ix = c->savestack_ix;
		306	PL_savestack_max = c->savestack_max;
		307	PL_retstack = c->retstack;
		308	PL_retstack_ix = c->retstack_ix;
		309	PL_retstack_max = c->retstack_max;
		310	PL_curcop = c->curcop;
		311	PL_top_env = c->top_env;
		312
		313	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
		314	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
		315	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		316
		317	{
		318	dSP;
		319	CV *cv;
		320
		321	/* now do the ugly restore mess */
		322	while ((cv = (CV *)POPs))
		323	{
		324	AV padlist = (AV )POPs;
		325
		326	if (padlist)
		327	{
		328	put_padlist (cv); /* mark this padlist as available */
		329	CvPADLIST(cv) = padlist;
		330	#ifdef USE_THREADS
		331	/CvOWNER(cv) = (struct perl_thread )POPs;*/
		332	#endif
		333	}
		334
		335	++CvDEPTH(cv);
		336	}
		337
		338	PUTBACK;
		339	}
		340	}
		341
		342	static void
		343	save_state(pTHX_ Coro__State c, int flags)
190	{	344	{
191	{	345	{
192	dSP;	346	dSP;
193	I32 cxix = cxstack_ix;	347	I32 cxix = cxstack_ix;
		348	PERL_CONTEXT *ccstk = cxstack;
194	PERL_SI *top_si = PL_curstackinfo;	349	PERL_SI *top_si = PL_curstackinfo;
195	PERL_CONTEXT *ccstk = cxstack;
196		350
197	/*	351	/*
198	* the worst thing you can imagine happens first - we have to save	352	* the worst thing you can imagine happens first - we have to save
199	* (and reinitialize) all cv's in the whole callchain :(	353	* (and reinitialize) all cv's in the whole callchain :(
200	*/	354	*/
201		355
202	PUSHs (Nullsv);	356	PUSHs (Nullsv);
203	/* this loop was inspired by pp_caller */	357	/* this loop was inspired by pp_caller */
204	for (;;)	358	for (;;)
205	{	359	{
206	while (cxix >= 0)	360	do
207	{	361	{
208	PERL_CONTEXT *cx = &ccstk[cxix--];	362	PERL_CONTEXT *cx = &ccstk[cxix--];
209		363
210	if (CxTYPE(cx) == CXt_SUB)	364	if (CxTYPE(cx) == CXt_SUB)
211	{	365	{
212	CV *cv = cx->blk_sub.cv;	366	CV *cv = cx->blk_sub.cv;
213	if (CvDEPTH(cv))	367	if (CvDEPTH(cv))
214	{	368	{
215	#ifdef USE_THREADS	369	#ifdef USE_THREADS
216	XPUSHs ((SV *)CvOWNER(cv));	370	/XPUSHs ((SV )CvOWNER(cv));*/
		371	/CvOWNER(cv) = 0;/
		372	/error must unlock this cv etc.. etc.../
217	#endif	373	#endif
218	EXTEND (SP, 3);	374	EXTEND (SP, CvDEPTH(cv)*2);
		375
		376	while (--CvDEPTH(cv))
		377	{
		378	/* this tells the restore code to increment CvDEPTH */
		379	PUSHs (Nullsv);
219	PUSHs ((SV *)CvDEPTH(cv));	380	PUSHs ((SV *)cv);
		381	}
		382
220	PUSHs ((SV *)CvPADLIST(cv));	383	PUSHs ((SV *)CvPADLIST(cv));
221	PUSHs ((SV *)cv);	384	PUSHs ((SV *)cv);
222		385
223	get_padlist (cv);	386	get_padlist (cv); /* this is a monster */
224
225	CvDEPTH(cv) = 0;
226	#ifdef USE_THREADS
227	CvOWNER(cv) = 0;
228	error must unlock this cv etc.. etc...
229	if you are here wondering about this error message then
230	the reason is that it will not work as advertised yet
231	#endif
232	}	387	}
233	}	388	}
234	else if (CxTYPE(cx) == CXt_FORMAT)	389	else if (CxTYPE(cx) == CXt_FORMAT)
235	{	390	{
236	/* I never used formats, so how should I know how these are implemented? */	391	/* I never used formats, so how should I know how these are implemented? */
237	/* my bold guess is as a simple, plain sub... */	392	/* my bold guess is as a simple, plain sub... */
238	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	393	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
239	}	394	}
240	}	395	}
		396	while (cxix >= 0);
241		397
242	if (top_si->si_type == PERLSI_MAIN)	398	if (top_si->si_type == PERLSI_MAIN)
243	break;	399	break;
244		400
245	top_si = top_si->si_prev;	401	top_si = top_si->si_prev;
…		…
248	}	404	}
249		405
250	PUTBACK;	406	PUTBACK;
251	}	407	}
252		408
		409	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
		410	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
		411	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		412
		413	/* I have not the slightest idea of why av_reify is necessary */
		414	/* but if it's missing the defav contents magically get replaced sometimes */
		415	if (c->defav)
		416	av_reify (c->defav);
		417
253	c->dowarn = PL_dowarn;	418	c->dowarn = PL_dowarn;
254	c->defav = GvAV (PL_defgv);	419	c->in_eval = PL_in_eval;
		420
255	c->curstackinfo = PL_curstackinfo;	421	c->curstackinfo = PL_curstackinfo;
256	c->curstack = PL_curstack;	422	c->curstack = PL_curstack;
257	c->mainstack = PL_mainstack;	423	c->mainstack = PL_mainstack;
258	c->stack_sp = PL_stack_sp;	424	c->stack_sp = PL_stack_sp;
259	c->op = PL_op;	425	c->op = PL_op;
…		…
275	c->savestack_max = PL_savestack_max;	441	c->savestack_max = PL_savestack_max;
276	c->retstack = PL_retstack;	442	c->retstack = PL_retstack;
277	c->retstack_ix = PL_retstack_ix;	443	c->retstack_ix = PL_retstack_ix;
278	c->retstack_max = PL_retstack_max;	444	c->retstack_max = PL_retstack_max;
279	c->curcop = PL_curcop;	445	c->curcop = PL_curcop;
		446	c->top_env = PL_top_env;
280	}	447	}
281		448
282	static void	449	/*
283	LOAD(pTHX_ Coro__State c)	450	* allocate various perl stacks. This is an exact copy
		451	* of perl.c:init_stacks, except that it uses less memory
		452	* on the assumption that coroutines do not usually need
		453	* a lot of stackspace.
		454	*/
		455	STATIC void
		456	coro_init_stacks (pTHX)
284	{	457	{
285	PL_dowarn = c->dowarn;	458	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
286	GvAV (PL_defgv) = c->defav;	459	PL_curstackinfo->si_type = PERLSI_MAIN;
287	PL_curstackinfo = c->curstackinfo;	460	PL_curstack = PL_curstackinfo->si_stack;
288	PL_curstack = c->curstack;	461	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
289	PL_mainstack = c->mainstack;	462
		463	PL_stack_base = AvARRAY(PL_curstack);
290	PL_stack_sp = c->stack_sp;	464	PL_stack_sp = PL_stack_base;
291	PL_op = c->op;	465	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
292	PL_curpad = c->curpad;	466
293	PL_stack_base = c->stack_base;	467	New(50,PL_tmps_stack,96,SV*);
294	PL_stack_max = c->stack_max;	468	PL_tmps_floor = -1;
295	PL_tmps_stack = c->tmps_stack;	469	PL_tmps_ix = -1;
296	PL_tmps_floor = c->tmps_floor;	470	PL_tmps_max = 96;
297	PL_tmps_ix = c->tmps_ix;	471
298	PL_tmps_max = c->tmps_max;	472	New(54,PL_markstack,16,I32);
299	PL_markstack = c->markstack;
300	PL_markstack_ptr = c->markstack_ptr;	473	PL_markstack_ptr = PL_markstack;
301	PL_markstack_max = c->markstack_max;	474	PL_markstack_max = PL_markstack + 16;
302	PL_scopestack = c->scopestack;
303	PL_scopestack_ix = c->scopestack_ix;
304	PL_scopestack_max = c->scopestack_max;
305	PL_savestack = c->savestack;
306	PL_savestack_ix = c->savestack_ix;
307	PL_savestack_max = c->savestack_max;
308	PL_retstack = c->retstack;
309	PL_retstack_ix = c->retstack_ix;
310	PL_retstack_max = c->retstack_max;
311	PL_curcop = c->curcop;
312		475
313	{	476	SET_MARK_OFFSET;
314	dSP;
315	CV *cv;
316		477
317	/* now do the ugly restore mess */	478	New(54,PL_scopestack,16,I32);
318	while ((cv = (CV *)POPs))	479	PL_scopestack_ix = 0;
319	{	480	PL_scopestack_max = 16;
320	AV padlist = (AV )POPs;
321		481
322	put_padlist (cv);	482	New(54,PL_savestack,96,ANY);
323	CvPADLIST(cv) = padlist;	483	PL_savestack_ix = 0;
324	CvDEPTH(cv) = (I32)POPs;	484	PL_savestack_max = 96;
325		485
326	#ifdef USE_THREADS	486	New(54,PL_retstack,8,OP*);
327	CvOWNER(cv) = (struct perl_thread *)POPs;	487	PL_retstack_ix = 0;
328	error does not work either	488	PL_retstack_max = 8;
329	#endif
330	}
331
332	PUTBACK;
333	}
334	}	489	}
335		490
336	/* this is an EXACT copy of S_nuke_stacks in perl.c, which is unfortunately static */	491	/*
		492	* destroy the stacks, the callchain etc...
		493	* still there is a memleak of 128 bytes...
		494	*/
337	STATIC void	495	STATIC void
338	destroy_stacks(pTHX)	496	destroy_stacks(pTHX)
339	{	497	{
340	dSP;
341
342	/* die does this while calling POPSTACK, but I just don't see why. */
343	dounwind(-1);
344
345	/* is this ugly, I ask? */	498	/* is this ugly, I ask? */
346	while (PL_scopestack_ix)	499	while (PL_scopestack_ix)
347	LEAVE;	500	LEAVE;
348		501
		502	/* sure it is, but more important: is it correct?? :/ */
		503	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
		504	FREETMPS;
		505
349	while (PL_curstackinfo->si_next)	506	while (PL_curstackinfo->si_next)
350	PL_curstackinfo = PL_curstackinfo->si_next;	507	PL_curstackinfo = PL_curstackinfo->si_next;
351		508
352	while (PL_curstackinfo)	509	while (PL_curstackinfo)
353	{	510	{
354	PERL_SI *p = PL_curstackinfo->si_prev;	511	PERL_SI *p = PL_curstackinfo->si_prev;
		512
		513	{
		514	dSP;
		515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
		516	PUTBACK; /* possibly superfluous */
		517	}
		518
		519	if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
		520	dounwind(-1);
355		521
356	SvREFCNT_dec(PL_curstackinfo->si_stack);	522	SvREFCNT_dec(PL_curstackinfo->si_stack);
357	Safefree(PL_curstackinfo->si_cxstack);	523	Safefree(PL_curstackinfo->si_cxstack);
358	Safefree(PL_curstackinfo);	524	Safefree(PL_curstackinfo);
359	PL_curstackinfo = p;	525	PL_curstackinfo = p;
360	}	526	}
361		527
362	if (PL_scopestack_ix != 0)
363	Perl_warner(aTHX_ WARN_INTERNAL,
364	"Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
365	(long)PL_scopestack_ix);
366	if (PL_savestack_ix != 0)
367	Perl_warner(aTHX_ WARN_INTERNAL,
368	"Unbalanced saves: %ld more saves than restores\n",
369	(long)PL_savestack_ix);
370	if (PL_tmps_floor != -1)
371	Perl_warner(aTHX_ WARN_INTERNAL,"Unbalanced tmps: %ld more allocs than frees\n",
372	(long)PL_tmps_floor + 1);
373	/*
374	*/
375	Safefree(PL_tmps_stack);	528	Safefree(PL_tmps_stack);
376	Safefree(PL_markstack);	529	Safefree(PL_markstack);
377	Safefree(PL_scopestack);	530	Safefree(PL_scopestack);
378	Safefree(PL_savestack);	531	Safefree(PL_savestack);
379	Safefree(PL_retstack);	532	Safefree(PL_retstack);
380	}	533	}
381		534
382	#define SUB_INIT "Coro::State::_newcoro"	535	static void
		536	allocate_stack (Coro__State ctx, int alloc)
		537	{
		538	coro_stack *stack;
		539
		540	New (0, stack, 1, coro_stack);
		541
		542	stack->refcnt = 1;
		543	stack->usecnt = 1;
		544	stack->gencnt = ctx->gencnt = 0;
		545	if (alloc)
		546	{
		547	#ifdef HAVE_MMAP
		548	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
		549	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);
		550	if (stack->sptr == (void *)-1)
		551	#endif
		552	{
		553	/FIXME//D//* reasonable stack size! */
		554	stack->ssize = -4096 * sizeof (long);
		555	New (0, stack->sptr, 4096, long);
		556	}
		557	}
		558	else
		559	stack->sptr = 0;
		560
		561	ctx->stack = stack;
		562	}
		563
		564	static void
		565	deallocate_stack (Coro__State ctx)
		566	{
		567	coro_stack *stack = ctx->stack;
		568
		569	ctx->stack = 0;
		570
		571	if (stack)
		572	{
		573	if (!--stack->refcnt)
		574	{
		575	#ifdef HAVE_MMAP
		576	if (stack->ssize > 0 && stack->sptr)
		577	munmap (stack->sptr, stack->ssize);
		578	else
		579	#else
		580	Safefree (stack->sptr);
		581	#endif
		582	Safefree (stack);
		583	}
		584	else if (ctx->gencnt == stack->gencnt)
		585	--stack->usecnt;
		586	}
		587	}
		588
		589	static void
		590	setup_coro (void *arg)
		591	{
		592	/*
		593	* emulate part of the perl startup here.
		594	*/
		595	dSP;
		596	Coro__State ctx = (Coro__State)arg;
		597	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
		598
		599	coro_init_stacks (aTHX);
		600	/PL_curcop = 0;/
		601	/PL_in_eval = PL_in_eval;/ /* inherit */
		602	SvREFCNT_dec (GvAV (PL_defgv));
		603	GvAV (PL_defgv) = ctx->args;
		604
		605	SPAGAIN;
		606
		607	if (ctx->stack)
		608	{
		609	ctx->cursp = 0;
		610
		611	PUSHMARK(SP);
		612	PUTBACK;
		613	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
		614
		615	if (SvTRUE (ERRSV))
		616	croak (NULL);
		617	else
		618	croak ("FATAL: CCTXT coroutine returned!");
		619	}
		620	else
		621	{
		622	UNOP myop;
		623
		624	PL_op = (OP *)&myop;
		625
		626	Zero(&myop, 1, UNOP);
		627	myop.op_next = Nullop;
		628	myop.op_flags = OPf_WANT_VOID;
		629
		630	PUSHMARK(SP);
		631	XPUSHs (sub_init);
		632	/*
		633	* the next line is slightly wrong, as PL_op->op_next
		634	* is actually being executed so we skip the first op.
		635	* that doesn't matter, though, since it is only
		636	* pp_nextstate and we never return...
		637	* ah yes, and I don't care anyways ;)
		638	*/
		639	PUTBACK;
		640	PL_op = pp_entersub();
		641	SPAGAIN;
		642
		643	ENTER; /* necessary e.g. for dounwind */
		644	}
		645	}
		646
		647	static void
		648	continue_coro (void *arg)
		649	{
		650	/*
		651	* this is a _very_ stripped down perl interpreter ;)
		652	*/
		653	Coro__State ctx = (Coro__State)arg;
		654
		655	/FIXME//* must set up top_env here */
		656	ctx->cursp = 0;
		657	PL_op = PL_op->op_next;
		658	CALLRUNOPS(aTHX);
		659
		660	abort ();
		661	}
		662
		663	STATIC void
		664	transfer(pTHX_ struct coro prev, struct coro next, int flags)
		665	{
		666	dSP;
		667	dSTACKLEVEL;
		668
		669	if (prev != next)
		670	{
		671	if (next->mainstack)
		672	{
		673	SAVE (prev, flags);
		674	LOAD (next);
		675
		676	/* mark this state as in-use */
		677	next->mainstack = 0;
		678	next->tmps_ix = -2;
		679
		680	/* stacklevel changed? if yes, grab the stack for us! */
		681	if (flags & TRANSFER_SAVE_CCTXT)
		682	{
		683	if (!prev->stack)
		684	allocate_stack (prev, 0);
		685	else if (prev->cursp != stacklevel
		686	&& prev->stack->usecnt > 1)
		687	{
		688	prev->gencnt = ++prev->stack->gencnt;
		689	prev->stack->usecnt = 1;
		690	}
		691
		692	/* has our stack been invalidated? */
		693	if (next->stack && next->stack->gencnt != next->gencnt)
		694	{
		695	deallocate_stack (next);
		696	allocate_stack (next, 1);
		697	coro_create (&(next->stack->cctx),
		698	continue_coro, (void *)next,
		699	next->stack->sptr, labs (next->stack->ssize));
		700	}
		701
		702	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		703	}
		704
		705	}
		706	else if (next->tmps_ix == -2)
		707	croak ("tried to transfer to running coroutine");
		708	else
		709	{
		710	SAVE (prev, -1); /* first get rid of the old state */
		711
		712	if (flags & TRANSFER_SAVE_CCTXT)
		713	{
		714	if (!prev->stack)
		715	allocate_stack (prev, 0);
		716
		717	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
		718	{
		719	setup_coro (next);
		720
		721	prev->stack->refcnt++;
		722	prev->stack->usecnt++;
		723	next->stack = prev->stack;
		724	next->gencnt = prev->gencnt;
		725	}
		726	else
		727	{
		728	allocate_stack (next, 1);
		729	coro_create (&(next->stack->cctx),
		730	setup_coro, (void *)next,
		731	next->stack->sptr, labs (next->stack->ssize));
		732	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
		733	}
		734	}
		735	else
		736	setup_coro (next);
		737	}
		738	}
		739
		740	next->cursp = stacklevel;
		741	}
		742
		743	static struct coro *
		744	sv_to_coro (SV arg, const char funcname, const char *varname)
		745	{
		746	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)
		747	{
		748	HE he = hv_fetch_ent((HV )SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
		749
		750	if (!he)
		751	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
		752
		753	arg = HeVAL(he);
		754	}
		755
		756	/* must also be changed inside Coro::Cont::yield */
		757	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
		758	return (struct coro ) SvIV((SV)SvRV(arg));
		759
		760	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
		761	/NORETURN/
		762	}
		763
		764	static void
		765	api_transfer(pTHX_ SV prev, SV next, int flags)
		766	{
		767	transfer(aTHX_
		768	sv_to_coro (prev, "Coro::transfer", "prev"),
		769	sv_to_coro (next, "Coro::transfer", "next"),
		770	flags);
		771	}
		772
		773	/ Coro ******************************************************************/
		774
		775	#define PRIO_MAX 3
		776	#define PRIO_HIGH 1
		777	#define PRIO_NORMAL 0
		778	#define PRIO_LOW -1
		779	#define PRIO_IDLE -3
		780	#define PRIO_MIN -4
		781
		782	/* for Coro.pm */
		783	static GV coro_current, coro_idle;
		784	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
		785	static int coro_nready;
		786
		787	static void
		788	coro_enq (SV *sv)
		789	{
		790	if (SvROK (sv))
		791	{
		792	SV *hv = SvRV (sv);
		793	if (SvTYPE (hv) == SVt_PVHV)
		794	{
		795	SV *xprio = hv_fetch ((HV )hv, "prio", 4, 0);
		796	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
		797
		798	prio = prio > PRIO_MAX ? PRIO_MAX
		799	: prio < PRIO_MIN ? PRIO_MIN
		800	: prio;
		801
		802	av_push (coro_ready [prio - PRIO_MIN], sv);
		803	coro_nready++;
		804
		805	return;
		806	}
		807	}
		808
		809	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		810	}
		811
		812	static SV *
		813	coro_deq (int min_prio)
		814	{
		815	int prio = PRIO_MAX - PRIO_MIN;
		816
		817	min_prio -= PRIO_MIN;
		818	if (min_prio < 0)
		819	min_prio = 0;
		820
		821	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		822	if (av_len (coro_ready[prio]) >= 0)
		823	{
		824	coro_nready--;
		825	return av_shift (coro_ready[prio]);
		826	}
		827
		828	return 0;
		829	}
		830
		831	static void
		832	api_ready (SV *coro)
		833	{
		834	coro_enq (SvREFCNT_inc (coro));
		835	}
		836
		837	static void
		838	api_schedule (int cede)
		839	{
		840	SV prev, next;
		841
		842	prev = GvSV (coro_current);
		843
		844	if (cede)
		845	coro_enq (SvREFCNT_inc (prev));
		846
		847	next = coro_deq (PRIO_MIN);
		848
		849	if (!next)
		850	next = SvREFCNT_inc (GvSV (coro_idle));
		851
		852	GvSV (coro_current) = SvREFCNT_inc (next);
		853	transfer (aTHX_
		854	sv_to_coro (prev, "Coro::schedule", "current coroutine"),
		855	sv_to_coro (next, "Coro::schedule", "next coroutine"),
		856	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
		857	SvREFCNT_dec (next);
		858	SvREFCNT_dec (prev);
		859	}
383		860
384	MODULE = Coro::State PACKAGE = Coro::State	861	MODULE = Coro::State PACKAGE = Coro::State
385		862
386	PROTOTYPES: ENABLE	863	PROTOTYPES: ENABLE
387		864
388	BOOT:	865	BOOT:
		866	{ /* {} necessary for stoopid perl-5.6.x */
		867	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
		868	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
		869	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
		870
		871	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
		872	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
		873	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
		874	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
		875
389	if (!padlist_cache)	876	if (!padlist_cache)
390	padlist_cache = newHV ();	877	padlist_cache = newHV ();
		878
		879	main_mainstack = PL_mainstack;
		880
		881	coroapi.ver = CORO_API_VERSION;
		882	coroapi.transfer = api_transfer;
		883	}
391		884
392	Coro::State	885	Coro::State
393	_newprocess(args)	886	_newprocess(args)
394	SV * args	887	SV * args
395	PROTOTYPE: $	888	PROTOTYPE: $
396	CODE:	889	CODE:
397	Coro__State coro;	890	Coro__State coro;
398		891
399	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)	892	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
400	croak ("Coro::State::newprocess expects an arrayref");	893	croak ("Coro::State::_newprocess expects an arrayref");
401		894
402	New (0, coro, 1, struct coro);	895	New (0, coro, 1, struct coro);
403		896
		897	coro->args = (AV *)SvREFCNT_inc (SvRV (args));
404	coro->mainstack = 0; /* actual work is done inside transfer */	898	coro->mainstack = 0; /* actual work is done inside transfer */
405	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	899	coro->stack = 0;
406		900
407	RETVAL = coro;	901	RETVAL = coro;
408	OUTPUT:	902	OUTPUT:
409	RETVAL	903	RETVAL
410		904
411	void	905	void
412	transfer(prev,next)	906	transfer(prev, next, flags)
413	Coro::State_or_hashref prev	907	Coro::State_or_hashref prev
414	Coro::State_or_hashref next	908	Coro::State_or_hashref next
		909	int flags
		910	PROTOTYPE: @
415	CODE:	911	CODE:
416
417	if (prev != next)
418	{
419	PUTBACK;	912	PUTBACK;
420	SAVE (aTHX_ prev);	913	transfer (aTHX_ prev, next, flags);
421
422	/*
423	* this could be done in newprocess which would lead to
424	* extremely elegant and fast (just PUTBACK/SAVE/LOAD/SPAGAIN)
425	* code here, but lazy allocation of stacks has also
426	* some virtues and the overhead of the if() is nil.
427	*/
428	if (next->mainstack)
429	{
430	LOAD (aTHX_ next);
431	next->mainstack = 0; /* unnecessary but much cleaner */
432	SPAGAIN;	914	SPAGAIN;
433	}
434	else
435	{
436	/*
437	* emulate part of the perl startup here.
438	*/
439	UNOP myop;
440
441	init_stacks (); /* from perl.c */
442	PL_op = (OP *)&myop;
443	/PL_curcop = 0;/
444	GvAV (PL_defgv) = (SV *)SvREFCNT_inc (next->args);
445
446	SPAGAIN;
447	Zero(&myop, 1, UNOP);
448	myop.op_next = Nullop;
449	myop.op_flags = OPf_WANT_VOID;
450
451	PUSHMARK(SP);
452	XPUSHs ((SV*)get_cv(SUB_INIT, TRUE));
453	PUTBACK;
454	/*
455	* the next line is slightly wrong, as PL_op->op_next
456	* is actually being executed so we skip the first op.
457	* that doesn't matter, though, since it is only
458	* pp_nextstate and we never return...
459	*/
460	PL_op = Perl_pp_entersub(aTHX);
461	SPAGAIN;
462
463	ENTER;
464	}
465	}
466		915
467	void	916	void
468	DESTROY(coro)	917	DESTROY(coro)
469	Coro::State coro	918	Coro::State coro
470	CODE:	919	CODE:
471		920
472	if (coro->mainstack)	921	if (coro->mainstack && coro->mainstack != main_mainstack)
473	{	922	{
474	struct coro temp;	923	struct coro temp;
475		924
476	PUTBACK;
477	SAVE(aTHX_ (&temp));	925	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
478	LOAD(aTHX_ coro);	926	LOAD(aTHX_ coro);
479		927
480	destroy_stacks ();	928	destroy_stacks (aTHX);
481	SvREFCNT_dec ((SV *)GvAV (PL_defgv));
482		929
483	LOAD((&temp));	930	LOAD((&temp)); /* this will get rid of defsv etc.. */
484	SPAGAIN;	931
		932	coro->mainstack = 0;
485	}	933	}
486		934
487	SvREFCNT_dec (coro->args);	935	deallocate_stack (coro);
		936
488	Safefree (coro);	937	Safefree (coro);
489		938
		939	void
		940	flush()
		941	CODE:
		942	#ifdef MAY_FLUSH
		943	flush_padlist_cache ();
		944	#endif
490		945
		946	void
		947	_exit(code)
		948	int code
		949	PROTOTYPE: $
		950	CODE:
		951	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
		952	_exit (code);
		953	#else
		954	signal (SIGTERM, SIG_DFL);
		955	raise (SIGTERM);
		956	exit (code);
		957	#endif
		958
		959	MODULE = Coro::State PACKAGE = Coro::Cont
		960
		961	# this is slightly dirty (should expose a c-level api)
		962
		963	void
		964	yield(...)
		965	PROTOTYPE: @
		966	CODE:
		967	static SV *returnstk;
		968	SV *sv;
		969	AV *defav = GvAV (PL_defgv);
		970	struct coro prev, next;
		971
		972	if (!returnstk)
		973	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
		974
		975	/* set up @_ -- ugly */
		976	av_clear (defav);
		977	av_fill (defav, items - 1);
		978	while (items--)
		979	av_store (defav, items, SvREFCNT_inc (ST(items)));
		980
		981	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
		982	sv = av_pop ((AV *)SvRV (returnstk));
		983	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
		984	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
		985	SvREFCNT_dec (sv);
		986
		987	transfer(aTHX_ prev, next, 0);
		988
		989	MODULE = Coro::State PACKAGE = Coro
		990
		991	# this is slightly dirty (should expose a c-level api)
		992
		993	BOOT:
		994	{
		995	int i;
		996	HV *stash = gv_stashpv ("Coro", TRUE);
		997
		998	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));
		999	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1000	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1001	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1002	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1003	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1004
		1005	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1006	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1007
		1008	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1009	coro_ready[i] = newAV ();
		1010
		1011	{
		1012	SV *sv = perl_get_sv("Coro::API", 1);
		1013
		1014	coroapi.schedule = api_schedule;
		1015	coroapi.ready = api_ready;
		1016	coroapi.nready = &coro_nready;
		1017	coroapi.current = coro_current;
		1018
		1019	GCoroAPI = &coroapi;
		1020	sv_setiv(sv, (IV)&coroapi);
		1021	SvREADONLY_on(sv);
		1022	}
		1023	}
		1024
		1025	void
		1026	ready(self)
		1027	SV * self
		1028	CODE:
		1029	api_ready (self);
		1030
		1031	int
		1032	nready(...)
		1033	PROTOTYPE:
		1034	CODE:
		1035	RETVAL = coro_nready;
		1036	OUTPUT:
		1037	RETVAL
		1038
		1039	void
		1040	schedule(...)
		1041	PROTOTYPE:
		1042	ALIAS:
		1043	cede = 1
		1044	CODE:
		1045	api_schedule (ix);
		1046

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Comparing Coro/Coro/State.xs (file contents): Revision 1.4 by root, Tue Jul 17 02:21:56 2001 UTC vs. Revision 1.27 by root, Mon Aug 20 16:58:19 2001 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.4 by root, Tue Jul 17 02:21:56 2001 UTC vs.
Revision 1.27 by root, Mon Aug 20 16:58:19 2001 UTC