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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.166 by root, Wed Sep 26 21:11:28 2007 UTC vs.
Revision 1.232 by root, Thu Apr 24 12:40:38 2008 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
2		2
3	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
4		5
5	#include "EXTERN.h"	6	#include "EXTERN.h"
6	#include "perl.h"	7	#include "perl.h"
7	#include "XSUB.h"	8	#include "XSUB.h"
8		9
9	#include "patchlevel.h"	10	#include "patchlevel.h"
10		11
11	#include <stdio.h>	12	#include <stdio.h>
12	#include <errno.h>	13	#include <errno.h>
13	#include <assert.h>	14	#include <assert.h>
		15
		16	#ifdef WIN32
		17	# undef setjmp
		18	# undef longjmp
		19	# undef _exit
		20	# define setjmp _setjmp // deep magic, don't ask
		21	#else
		22	# include <inttypes.h> /* most portable stdint.h */
		23	#endif
14		24
15	#ifdef HAVE_MMAP	25	#ifdef HAVE_MMAP
16	# include <unistd.h>	26	# include <unistd.h>
17	# include <sys/mman.h>	27	# include <sys/mman.h>
18	# ifndef MAP_ANONYMOUS	28	# ifndef MAP_ANONYMOUS
…		…
70	# ifndef IS_PADCONST	80	# ifndef IS_PADCONST
71	# define IS_PADCONST(v) 0	81	# define IS_PADCONST(v) 0
72	# endif	82	# endif
73	#endif	83	#endif
74		84
		85	/* 5.8.8 */
		86	#ifndef GV_NOTQUAL
		87	# define GV_NOTQUAL 0
		88	#endif
		89	#ifndef newSV
		90	# define newSV(l) NEWSV(0,l)
		91	#endif
		92
		93	/* 5.11 */
		94	#ifndef CxHASARGS
		95	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		96	#endif
		97
75	/* 5.8.7 */	98	/* 5.8.7 */
76	#ifndef SvRV_set	99	#ifndef SvRV_set
77	# define SvRV_set(s,v) SvRV(s) = (v)	100	# define SvRV_set(s,v) SvRV(s) = (v)
78	#endif	101	#endif
79		102
…		…
98	#define IN_DESTRUCT (PL_main_cv == Nullcv)	121	#define IN_DESTRUCT (PL_main_cv == Nullcv)
99		122
100	#if __GNUC__ >= 3	123	#if __GNUC__ >= 3
101	# define attribute(x) __attribute__(x)	124	# define attribute(x) __attribute__(x)
102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	125	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		126	# define expect(expr,value) __builtin_expect ((expr),(value))
103	#else	127	#else
104	# define attribute(x)	128	# define attribute(x)
105	# define BARRIER	129	# define BARRIER
		130	# define expect(expr,value) (expr)
106	#endif	131	#endif
		132
		133	#define expect_false(expr) expect ((expr) != 0, 0)
		134	#define expect_true(expr) expect ((expr) != 0, 1)
107		135
108	#define NOINLINE attribute ((noinline))	136	#define NOINLINE attribute ((noinline))
109		137
110	#include "CoroAPI.h"	138	#include "CoroAPI.h"
111		139
…		…
130	static size_t coro_stacksize = CORO_STACKSIZE;	158	static size_t coro_stacksize = CORO_STACKSIZE;
131	static struct CoroAPI coroapi;	159	static struct CoroAPI coroapi;
132	static AV *main_mainstack; /* used to differentiate between $main and others */	160	static AV *main_mainstack; /* used to differentiate between $main and others */
133	static JMPENV *main_top_env;	161	static JMPENV *main_top_env;
134	static HV *coro_state_stash, *coro_stash;	162	static HV *coro_state_stash, *coro_stash;
135	static SV *coro_mortal; /* will be freed after next transfer */	163	static volatile SV *coro_mortal; /* will be freed after next transfer */
		164
		165	static GV *irsgv; /* $/ */
		166	static GV *stdoutgv; /* *STDOUT */
		167	static SV *rv_diehook;
		168	static SV *rv_warnhook;
		169	static HV *hv_sig; /* %SIG */
136		170
137	/* async_pool helper stuff */	171	/* async_pool helper stuff */
138	static SV *sv_pool_rss;	172	static SV *sv_pool_rss;
139	static SV *sv_pool_size;	173	static SV *sv_pool_size;
140	static AV *av_async_pool;	174	static AV *av_async_pool;
141		175
142	static struct coro_cctx *cctx_first;	176	static struct coro_cctx *cctx_first;
143	static int cctx_count, cctx_idle;	177	static int cctx_count, cctx_idle;
144		178
145	enum {	179	enum {
146	CC_MAPPED = 0x01,	180	CC_MAPPED = 0x01,
147	CC_TRACE = 0x02,
148	CC_NOREUSE = 0x04, /* throw this away after tracing */	181	CC_NOREUSE = 0x02, /* throw this away after tracing */
		182	CC_TRACE = 0x04,
		183	CC_TRACE_SUB = 0x08, /* trace sub calls */
		184	CC_TRACE_LINE = 0x10, /* trace each statement */
		185	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
149	};	186	};
150		187
151	/* this is a structure representing a c-level coroutine */	188	/* this is a structure representing a c-level coroutine */
152	typedef struct coro_cctx {	189	typedef struct coro_cctx {
153	struct coro_cctx *next;	190	struct coro_cctx *next;
…		…
173	CF_READY = 0x0002, /* coroutine is ready */	210	CF_READY = 0x0002, /* coroutine is ready */
174	CF_NEW = 0x0004, /* has never been switched to */	211	CF_NEW = 0x0004, /* has never been switched to */
175	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	212	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
176	};	213	};
177		214
		215	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		216	typedef struct {
		217	SV *defsv;
		218	AV *defav;
		219	SV *errsv;
		220	SV *irsgv;
		221	#define VAR(name,type) type name;
		222	# include "state.h"
		223	#undef VAR
		224	} perl_slots;
		225
		226	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		227
178	/* this is a structure representing a perl-level coroutine */	228	/* this is a structure representing a perl-level coroutine */
179	struct coro {	229	struct coro {
180	/* the c coroutine allocated to this perl coroutine, if any */	230	/* the c coroutine allocated to this perl coroutine, if any */
181	coro_cctx *cctx;	231	coro_cctx *cctx;
182		232
		233	/* process data */
		234	AV *mainstack;
		235	perl_slots *slot; /* basically the saved sp */
		236
183	/* data associated with this coroutine (initial args) */	237	AV *args; /* data associated with this coroutine (initial args) */
184	AV *args;	238	int refcnt; /* coroutines are refcounted, yes */
185	int refcnt;
186	int save; /* CORO_SAVE flags */
187	int flags; /* CF_ flags */	239	int flags; /* CF_ flags */
		240	HV *hv; /* the perl hash associated with this coro, if any */
188		241
189	/* optionally saved, might be zero */	242	/* statistics */
190	AV *defav; /* @_ */	243	int usecount; /* number of transfers to this coro */
191	SV *defsv; /* $_ */
192	SV *errsv; /* $@ */
193	GV *deffh; /* default filehandle */
194	SV *irssv; /* $/ */
195	SV *irssv_sv; /* real $/ cache */
196
197	#define VAR(name,type) type name;
198	# include "state.h"
199	#undef VAR
200		244
201	/* coro process data */	245	/* coro process data */
202	int prio;	246	int prio;
		247	SV *throw; /* exception to be thrown */
		248
		249	/* async_pool */
		250	SV *saved_deffh;
203		251
204	/* linked list */	252	/* linked list */
205	struct coro *next, *prev;	253	struct coro *next, *prev;
206	HV *hv; /* the perl hash associated with this coro, if any */
207	};	254	};
208		255
209	typedef struct coro *Coro__State;	256	typedef struct coro *Coro__State;
210	typedef struct coro *Coro__State_or_hashref;	257	typedef struct coro *Coro__State_or_hashref;
211		258
…		…
224	static int coro_nready;	271	static int coro_nready;
225	static struct coro *coro_first;	272	static struct coro *coro_first;
226		273
227	/** lowlevel stuff **********************************************************/	274	/** lowlevel stuff **********************************************************/
228		275
		276	static SV *
		277	coro_get_sv (pTHX_ const char *name, int create)
		278	{
		279	#if PERL_VERSION_ATLEAST (5,10,0)
		280	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		281	get_sv (name, create);
		282	#endif
		283	return get_sv (name, create);
		284	}
		285
		286	static AV *
		287	coro_get_av (pTHX_ const char *name, int create)
		288	{
		289	#if PERL_VERSION_ATLEAST (5,10,0)
		290	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		291	get_av (name, create);
		292	#endif
		293	return get_av (name, create);
		294	}
		295
		296	static HV *
		297	coro_get_hv (pTHX_ const char *name, int create)
		298	{
		299	#if PERL_VERSION_ATLEAST (5,10,0)
		300	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		301	get_hv (name, create);
		302	#endif
		303	return get_hv (name, create);
		304	}
		305
229	static AV *	306	static AV *
230	coro_clone_padlist (pTHX_ CV *cv)	307	coro_clone_padlist (pTHX_ CV *cv)
231	{	308	{
232	AV *padlist = CvPADLIST (cv);	309	AV *padlist = CvPADLIST (cv);
233	AV *newpadlist, *newpad;	310	AV *newpadlist, *newpad;
234		311
235	newpadlist = newAV ();	312	newpadlist = newAV ();
236	AvREAL_off (newpadlist);	313	AvREAL_off (newpadlist);
237	#if PERL_VERSION_ATLEAST (5,9,0)	314	#if PERL_VERSION_ATLEAST (5,10,0)
238	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);	315	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
239	#else	316	#else
240	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	317	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
241	#endif	318	#endif
242	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	319	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
…		…
280		357
281	/* casting is fun. */	358	/* casting is fun. */
282	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	359	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
283	free_padlist (aTHX_ padlist);	360	free_padlist (aTHX_ padlist);
284		361
285	SvREFCNT_dec (av);
286
287	return 0;	362	return 0;
288	}	363	}
289		364
290	#define PERL_MAGIC_coro PERL_MAGIC_ext	365	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		366	#define CORO_MAGIC_type_state PERL_MAGIC_ext
291		367
292	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	368	static MGVTBL coro_cv_vtbl = {
		369	0, 0, 0, 0,
		370	coro_cv_free
		371	};
293		372
294	#define CORO_MAGIC(cv) \	373	#define CORO_MAGIC(sv,type) \
295	SvMAGIC (cv) \	374	SvMAGIC (sv) \
296	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	375	? SvMAGIC (sv)->mg_type == type \
297	? SvMAGIC (cv) \	376	? SvMAGIC (sv) \
298	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	377	: mg_find (sv, type) \
299	: 0	378	: 0
		379
		380	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		381	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		382
		383	static struct coro *
		384	SvSTATE_ (pTHX_ SV *coro)
		385	{
		386	HV *stash;
		387	MAGIC *mg;
		388
		389	if (SvROK (coro))
		390	coro = SvRV (coro);
		391
		392	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		393	croak ("Coro::State object required");
		394
		395	stash = SvSTASH (coro);
		396	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		397	{
		398	/* very slow, but rare, check */
		399	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		400	croak ("Coro::State object required");
		401	}
		402
		403	mg = CORO_MAGIC_state (coro);
		404	return (struct coro *)mg->mg_ptr;
		405	}
		406
		407	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
300		408
301	/* the next two functions merely cache the padlists */	409	/* the next two functions merely cache the padlists */
302	static void	410	static void
303	get_padlist (pTHX_ CV *cv)	411	get_padlist (pTHX_ CV *cv)
304	{	412	{
305	MAGIC *mg = CORO_MAGIC (cv);	413	MAGIC *mg = CORO_MAGIC_cv (cv);
306	AV *av;	414	AV *av;
307		415
308	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	416	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
309	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	417	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
310	else	418	else
311	{	419	{
312	#if CORO_PREFER_PERL_FUNCTIONS	420	#if CORO_PREFER_PERL_FUNCTIONS
313	/* this is probably cleaner, but also slower? */	421	/* this is probably cleaner, but also slower? */
…		…
322	}	430	}
323		431
324	static void	432	static void
325	put_padlist (pTHX_ CV *cv)	433	put_padlist (pTHX_ CV *cv)
326	{	434	{
327	MAGIC *mg = CORO_MAGIC (cv);	435	MAGIC *mg = CORO_MAGIC_cv (cv);
328	AV *av;	436	AV *av;
329		437
330	if (!mg)	438	if (expect_false (!mg))
331	{	439	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
332	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
333	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
334	mg->mg_virtual = &vtbl_coro;
335	mg->mg_obj = (SV *)newAV ();
336	}
337		440
338	av = (AV *)mg->mg_obj;	441	av = (AV *)mg->mg_obj;
339		442
340	if (AvFILLp (av) >= AvMAX (av))	443	if (expect_false (AvFILLp (av) >= AvMAX (av)))
341	av_extend (av, AvMAX (av) + 1);	444	av_extend (av, AvMAX (av) + 1);
342		445
343	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	446	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
344	}	447	}
345		448
346	/** load & save, init *******************************************************/	449	/** load & save, init *******************************************************/
347
348	#define SB do {
349	#define SE } while (0)
350
351	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
352		450
353	static void	451	static void
354	load_perl (pTHX_ Coro__State c)	452	load_perl (pTHX_ Coro__State c)
355	{	453	{
		454	perl_slots *slot = c->slot;
		455	c->slot = 0;
		456
		457	PL_mainstack = c->mainstack;
		458
		459	GvSV (PL_defgv) = slot->defsv;
		460	GvAV (PL_defgv) = slot->defav;
		461	GvSV (PL_errgv) = slot->errsv;
		462	GvSV (irsgv) = slot->irsgv;
		463
356	#define VAR(name,type) PL_ ## name = c->name;	464	#define VAR(name,type) PL_ ## name = slot->name;
357	# include "state.h"	465	# include "state.h"
358	#undef VAR	466	#undef VAR
359
360	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
361	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
362	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
363	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
364
365	if (c->irssv)
366	{
367	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
368	{
369	SvREFCNT_dec (c->irssv);
370	c->irssv = 0;
371	}
372	else
373	{
374	REPLACE_SV (PL_rs, c->irssv);
375	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
376	sv_setsv (c->irssv_sv, PL_rs);
377	}
378	}
379		467
380	{	468	{
381	dSP;	469	dSP;
		470
382	CV *cv;	471	CV *cv;
383		472
384	/* now do the ugly restore mess */	473	/* now do the ugly restore mess */
385	while ((cv = (CV *)POPs))	474	while (expect_true (cv = (CV *)POPs))
386	{	475	{
387	put_padlist (aTHX_ cv); /* mark this padlist as available */	476	put_padlist (aTHX_ cv); /* mark this padlist as available */
388	CvDEPTH (cv) = PTR2IV (POPs);	477	CvDEPTH (cv) = PTR2IV (POPs);
389	CvPADLIST (cv) = (AV *)POPs;	478	CvPADLIST (cv) = (AV *)POPs;
390	}	479	}
…		…
409		498
410	XPUSHs (Nullsv);	499	XPUSHs (Nullsv);
411	/* this loop was inspired by pp_caller */	500	/* this loop was inspired by pp_caller */
412	for (;;)	501	for (;;)
413	{	502	{
414	while (cxix >= 0)	503	while (expect_true (cxix >= 0))
415	{	504	{
416	PERL_CONTEXT *cx = &ccstk[cxix--];	505	PERL_CONTEXT *cx = &ccstk[cxix--];
417		506
418	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)	507	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
419	{	508	{
420	CV *cv = cx->blk_sub.cv;	509	CV *cv = cx->blk_sub.cv;
421		510
422	if (CvDEPTH (cv))	511	if (expect_true (CvDEPTH (cv)))
423	{	512	{
424	EXTEND (SP, 3);	513	EXTEND (SP, 3);
425	PUSHs ((SV *)CvPADLIST (cv));	514	PUSHs ((SV *)CvPADLIST (cv));
426	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	515	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
427	PUSHs ((SV *)cv);	516	PUSHs ((SV *)cv);
…		…
430	get_padlist (aTHX_ cv);	519	get_padlist (aTHX_ cv);
431	}	520	}
432	}	521	}
433	}	522	}
434		523
435	if (top_si->si_type == PERLSI_MAIN)	524	if (expect_true (top_si->si_type == PERLSI_MAIN))
436	break;	525	break;
437		526
438	top_si = top_si->si_prev;	527	top_si = top_si->si_prev;
439	ccstk = top_si->si_cxstack;	528	ccstk = top_si->si_cxstack;
440	cxix = top_si->si_cxix;	529	cxix = top_si->si_cxix;
441	}	530	}
442		531
443	PUTBACK;	532	PUTBACK;
444	}	533	}
445		534
446	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	535	/* allocate some space on the context stack for our purposes */
447	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	536	/* we manually unroll here, as usually 2 slots is enough */
448	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	537	if (SLOT_COUNT >= 1) CXINC;
449	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;	538	if (SLOT_COUNT >= 2) CXINC;
450	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	539	if (SLOT_COUNT >= 3) CXINC;
		540	{
		541	int i;
		542	for (i = 3; i < SLOT_COUNT; ++i)
		543	CXINC;
		544	}
		545	cxstack_ix -= SLOT_COUNT; /* undo allocation */
451		546
		547	c->mainstack = PL_mainstack;
		548
		549	{
		550	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		551
		552	slot->defav = GvAV (PL_defgv);
		553	slot->defsv = DEFSV;
		554	slot->errsv = ERRSV;
		555	slot->irsgv = GvSV (irsgv);
		556
452	#define VAR(name,type)c->name = PL_ ## name;	557	#define VAR(name,type) slot->name = PL_ ## name;
453	# include "state.h"	558	# include "state.h"
454	#undef VAR	559	#undef VAR
		560	}
455	}	561	}
456		562
457	/*	563	/*
458	* allocate various perl stacks. This is an exact copy	564	* allocate various perl stacks. This is an exact copy
459	* of perl.c:init_stacks, except that it uses less memory	565	* of perl.c:init_stacks, except that it uses less memory
…		…
464	# define coro_init_stacks init_stacks	570	# define coro_init_stacks init_stacks
465	#else	571	#else
466	static void	572	static void
467	coro_init_stacks (pTHX)	573	coro_init_stacks (pTHX)
468	{	574	{
469	PL_curstackinfo = new_stackinfo(64, 6);	575	PL_curstackinfo = new_stackinfo(32, 8);
470	PL_curstackinfo->si_type = PERLSI_MAIN;	576	PL_curstackinfo->si_type = PERLSI_MAIN;
471	PL_curstack = PL_curstackinfo->si_stack;	577	PL_curstack = PL_curstackinfo->si_stack;
472	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	578	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
473		579
474	PL_stack_base = AvARRAY(PL_curstack);	580	PL_stack_base = AvARRAY(PL_curstack);
475	PL_stack_sp = PL_stack_base;	581	PL_stack_sp = PL_stack_base;
476	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	582	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
477		583
478	New(50,PL_tmps_stack,64,SV*);	584	New(50,PL_tmps_stack,32,SV*);
479	PL_tmps_floor = -1;	585	PL_tmps_floor = -1;
480	PL_tmps_ix = -1;	586	PL_tmps_ix = -1;
481	PL_tmps_max = 64;	587	PL_tmps_max = 32;
482		588
483	New(54,PL_markstack,16,I32);	589	New(54,PL_markstack,16,I32);
484	PL_markstack_ptr = PL_markstack;	590	PL_markstack_ptr = PL_markstack;
485	PL_markstack_max = PL_markstack + 16;	591	PL_markstack_max = PL_markstack + 16;
486		592
487	#ifdef SET_MARK_OFFSET	593	#ifdef SET_MARK_OFFSET
488	SET_MARK_OFFSET;	594	SET_MARK_OFFSET;
489	#endif	595	#endif
490		596
491	New(54,PL_scopestack,16,I32);	597	New(54,PL_scopestack,8,I32);
492	PL_scopestack_ix = 0;	598	PL_scopestack_ix = 0;
493	PL_scopestack_max = 16;	599	PL_scopestack_max = 8;
494		600
495	New(54,PL_savestack,64,ANY);	601	New(54,PL_savestack,24,ANY);
496	PL_savestack_ix = 0;	602	PL_savestack_ix = 0;
497	PL_savestack_max = 64;	603	PL_savestack_max = 24;
498		604
499	#if !PERL_VERSION_ATLEAST (5,9,0)	605	#if !PERL_VERSION_ATLEAST (5,10,0)
500	New(54,PL_retstack,4,OP*);	606	New(54,PL_retstack,4,OP*);
501	PL_retstack_ix = 0;	607	PL_retstack_ix = 0;
502	PL_retstack_max = 4;	608	PL_retstack_max = 4;
503	#endif	609	#endif
504	}	610	}
…		…
508	* destroy the stacks, the callchain etc...	614	* destroy the stacks, the callchain etc...
509	*/	615	*/
510	static void	616	static void
511	coro_destroy_stacks (pTHX)	617	coro_destroy_stacks (pTHX)
512	{	618	{
513	if (!IN_DESTRUCT)
514	{
515	/* restore all saved variables and stuff */
516	LEAVE_SCOPE (0);
517	assert (PL_tmps_floor == -1);
518
519	/* free all temporaries */
520	FREETMPS;
521	assert (PL_tmps_ix == -1);
522
523	/* unwind all extra stacks */
524	POPSTACK_TO (PL_mainstack);
525
526	/* unwind main stack */
527	dounwind (-1);
528	}
529
530	while (PL_curstackinfo->si_next)	619	while (PL_curstackinfo->si_next)
531	PL_curstackinfo = PL_curstackinfo->si_next;	620	PL_curstackinfo = PL_curstackinfo->si_next;
532		621
533	while (PL_curstackinfo)	622	while (PL_curstackinfo)
534	{	623	{
…		…
544		633
545	Safefree (PL_tmps_stack);	634	Safefree (PL_tmps_stack);
546	Safefree (PL_markstack);	635	Safefree (PL_markstack);
547	Safefree (PL_scopestack);	636	Safefree (PL_scopestack);
548	Safefree (PL_savestack);	637	Safefree (PL_savestack);
549	#if !PERL_VERSION_ATLEAST (5,9,0)	638	#if !PERL_VERSION_ATLEAST (5,10,0)
550	Safefree (PL_retstack);	639	Safefree (PL_retstack);
551	#endif	640	#endif
552	}	641	}
553		642
554	static size_t	643	static size_t
555	coro_rss (struct coro *coro)	644	coro_rss (pTHX_ struct coro *coro)
556	{	645	{
557	size_t rss = sizeof (coro);	646	size_t rss = sizeof (*coro);
558		647
559	if (coro->mainstack)	648	if (coro->mainstack)
560	{	649	{
		650	perl_slots tmp_slot;
		651	perl_slots *slot;
		652
561	if (coro->flags & CF_RUNNING)	653	if (coro->flags & CF_RUNNING)
562	{	654	{
		655	slot = &tmp_slot;
		656
563	#define VAR(name,type)coro->name = PL_ ## name;	657	#define VAR(name,type) slot->name = PL_ ## name;
564	# include "state.h"	658	# include "state.h"
565	#undef VAR	659	#undef VAR
566	}	660	}
		661	else
		662	slot = coro->slot;
567		663
568	rss += sizeof (coro->curstackinfo);	664	rss += sizeof (slot->curstackinfo);
569	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
570	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);	665	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
571	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);	666	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
572	rss += coro->tmps_max * sizeof (SV *);	667	rss += slot->tmps_max * sizeof (SV *);
573	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);	668	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
574	rss += coro->scopestack_max * sizeof (I32);	669	rss += slot->scopestack_max * sizeof (I32);
575	rss += coro->savestack_max * sizeof (ANY);	670	rss += slot->savestack_max * sizeof (ANY);
576		671
577	#if !PERL_VERSION_ATLEAST (5,9,0)	672	#if !PERL_VERSION_ATLEAST (5,10,0)
578	rss += coro->retstack_max * sizeof (OP *);	673	rss += slot->retstack_max * sizeof (OP *);
579	#endif	674	#endif
580	}	675	}
581		676
582	return rss;	677	return rss;
583	}	678	}
584		679
585	/** coroutine stack handling ************************************************/	680	/** coroutine stack handling ************************************************/
586		681
		682	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		683	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		684
		685	/*
		686	* This overrides the default magic get method of %SIG elements.
		687	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		688	* and instead of tryign to save and restore the hash elements, we just provide
		689	* readback here.
		690	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		691	* not expecting this to actually change the hook. This is a potential problem
		692	* when a schedule happens then, but we ignore this.
		693	*/
		694	static int
		695	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		696	{
		697	const char *s = MgPV_nolen_const (mg);
		698
		699	if (*s == '_')
		700	{
		701	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		702	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		703	}
		704
		705	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		706	}
		707
		708	static int
		709	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		710	{
		711	const char *s = MgPV_nolen_const (mg);
		712
		713	if (*s == '_')
		714	{
		715	SV **svp = 0;
		716
		717	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		718	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		719
		720	if (svp)
		721	{
		722	SV *old = *svp;
		723	*svp = newSVsv (sv);
		724	SvREFCNT_dec (old);
		725	return 0;
		726	}
		727	}
		728
		729	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		730	}
		731
587	static void	732	static void
588	setup_coro (pTHX_ struct coro *coro)	733	coro_setup (pTHX_ struct coro *coro)
589	{	734	{
590	/*	735	/*
591	* emulate part of the perl startup here.	736	* emulate part of the perl startup here.
592	*/	737	*/
593	coro_init_stacks (aTHX);	738	coro_init_stacks (aTHX);
594		739
		740	PL_runops = RUNOPS_DEFAULT;
595	PL_curcop = &PL_compiling;	741	PL_curcop = &PL_compiling;
596	PL_in_eval = EVAL_NULL;	742	PL_in_eval = EVAL_NULL;
597	PL_comppad = 0;	743	PL_comppad = 0;
598	PL_curpm = 0;	744	PL_curpm = 0;
		745	PL_curpad = 0;
599	PL_localizing = 0;	746	PL_localizing = 0;
600	PL_dirty = 0;	747	PL_dirty = 0;
601	PL_restartop = 0;	748	PL_restartop = 0;
		749	#if PERL_VERSION_ATLEAST (5,10,0)
		750	PL_parser = 0;
		751	#endif
		752
		753	/* recreate the die/warn hooks */
		754	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		755	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		756
		757	GvSV (PL_defgv) = newSV (0);
		758	GvAV (PL_defgv) = coro->args; coro->args = 0;
		759	GvSV (PL_errgv) = newSV (0);
		760	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		761	PL_rs = newSVsv (GvSV (irsgv));
		762	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
602		763
603	{	764	{
604	dSP;	765	dSP;
605	LOGOP myop;	766	LOGOP myop;
606		767
607	SvREFCNT_dec (GvAV (PL_defgv));
608	GvAV (PL_defgv) = coro->args; coro->args = 0;
609
610	Zero (&myop, 1, LOGOP);	768	Zero (&myop, 1, LOGOP);
611	myop.op_next = Nullop;	769	myop.op_next = Nullop;
612	myop.op_flags = OPf_WANT_VOID;	770	myop.op_flags = OPf_WANT_VOID;
613		771
614	PUSHMARK (SP);	772	PUSHMARK (SP);
615	XPUSHs (av_shift (GvAV (PL_defgv)));	773	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
616	PUTBACK;	774	PUTBACK;
617	PL_op = (OP *)&myop;	775	PL_op = (OP *)&myop;
618	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	776	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
619	SPAGAIN;	777	SPAGAIN;
620	}	778	}
621		779
622	ENTER; /* necessary e.g. for dounwind */	780	/* this newly created coroutine might be run on an existing cctx which most
		781	* likely was suspended in set_stacklevel, called from entersub.
		782	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		783	* so we ENTER here for symmetry
		784	*/
		785	ENTER;
		786	}
		787
		788	static void
		789	coro_destroy (pTHX_ struct coro *coro)
		790	{
		791	if (!IN_DESTRUCT)
		792	{
		793	/* restore all saved variables and stuff */
		794	LEAVE_SCOPE (0);
		795	assert (PL_tmps_floor == -1);
		796
		797	/* free all temporaries */
		798	FREETMPS;
		799	assert (PL_tmps_ix == -1);
		800
		801	/* unwind all extra stacks */
		802	POPSTACK_TO (PL_mainstack);
		803
		804	/* unwind main stack */
		805	dounwind (-1);
		806	}
		807
		808	SvREFCNT_dec (GvSV (PL_defgv));
		809	SvREFCNT_dec (GvAV (PL_defgv));
		810	SvREFCNT_dec (GvSV (PL_errgv));
		811	SvREFCNT_dec (PL_defoutgv);
		812	SvREFCNT_dec (PL_rs);
		813	SvREFCNT_dec (GvSV (irsgv));
		814
		815	SvREFCNT_dec (PL_diehook);
		816	SvREFCNT_dec (PL_warnhook);
		817
		818	SvREFCNT_dec (coro->saved_deffh);
		819	SvREFCNT_dec (coro->throw);
		820
		821	coro_destroy_stacks (aTHX);
623	}	822	}
624		823
625	static void	824	static void
626	free_coro_mortal (pTHX)	825	free_coro_mortal (pTHX)
627	{	826	{
628	if (coro_mortal)	827	if (expect_true (coro_mortal))
629	{	828	{
630	SvREFCNT_dec (coro_mortal);	829	SvREFCNT_dec (coro_mortal);
631	coro_mortal = 0;	830	coro_mortal = 0;
632	}	831	}
633	}	832	}
634		833
635	static void
636	do_trace (pTHX)
637	{
638	if (PL_curcop != &PL_compiling)
639	{
640	runops_proc_t old_runops = PL_runops;
641	dSP;
642	ENTER;
643	SAVETMPS;
644	PUSHMARK (SP);
645	PUTBACK;
646	PL_runops = RUNOPS_DEFAULT;
647	call_pv ("Coro::_do_trace", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD | G_NOARGS);
648	PL_runops = old_runops;
649	SPAGAIN;
650	FREETMPS;
651	LEAVE;
652	PUTBACK;
653	}
654	}
655
656	static int	834	static int
657	runops_coro (pTHX)	835	runops_trace (pTHX)
658	{	836	{
659	COP *oldcop = 0;	837	COP *oldcop = 0;
		838	int oldcxix = -2;
		839	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		840	coro_cctx *cctx = coro->cctx;
660		841
661	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))	842	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
662	{	843	{
663	PERL_ASYNC_CHECK ();	844	PERL_ASYNC_CHECK ();
664		845
665	if (oldcop != PL_curcop)	846	if (cctx->flags & CC_TRACE_ALL)
666	{	847	{
		848	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		849	{
		850	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		851	SV **bot, **top;
		852	AV *av = newAV (); /* return values */
		853	SV **cb;
		854	dSP;
		855
		856	GV *gv = CvGV (cx->blk_sub.cv);
		857	SV *fullname = sv_2mortal (newSV (0));
		858	if (isGV (gv))
		859	gv_efullname3 (fullname, gv, 0);
		860
		861	bot = PL_stack_base + cx->blk_oldsp + 1;
		862	top = cx->blk_gimme == G_ARRAY ? SP + 1
		863	: cx->blk_gimme == G_SCALAR ? bot + 1
		864	: bot;
		865
		866	av_extend (av, top - bot);
		867	while (bot < top)
		868	av_push (av, SvREFCNT_inc (*bot++));
		869
		870	PL_runops = RUNOPS_DEFAULT;
		871	ENTER;
		872	SAVETMPS;
		873	EXTEND (SP, 3);
		874	PUSHMARK (SP);
		875	PUSHs (&PL_sv_no);
		876	PUSHs (fullname);
		877	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		878	PUTBACK;
		879	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		880	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		881	SPAGAIN;
		882	FREETMPS;
		883	LEAVE;
		884	PL_runops = runops_trace;
		885	}
		886
		887	if (oldcop != PL_curcop)
		888	{
667	oldcop = PL_curcop;	889	oldcop = PL_curcop;
668	do_trace (aTHX);	890
		891	if (PL_curcop != &PL_compiling)
		892	{
		893	SV **cb;
		894
		895	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		896	{
		897	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		898
		899	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		900	{
		901	runops_proc_t old_runops = PL_runops;
		902	dSP;
		903	GV *gv = CvGV (cx->blk_sub.cv);
		904	SV *fullname = sv_2mortal (newSV (0));
		905
		906	if (isGV (gv))
		907	gv_efullname3 (fullname, gv, 0);
		908
		909	PL_runops = RUNOPS_DEFAULT;
		910	ENTER;
		911	SAVETMPS;
		912	EXTEND (SP, 3);
		913	PUSHMARK (SP);
		914	PUSHs (&PL_sv_yes);
		915	PUSHs (fullname);
		916	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		917	PUTBACK;
		918	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		919	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		920	SPAGAIN;
		921	FREETMPS;
		922	LEAVE;
		923	PL_runops = runops_trace;
		924	}
		925
		926	oldcxix = cxstack_ix;
		927	}
		928
		929	if (cctx->flags & CC_TRACE_LINE)
		930	{
		931	dSP;
		932
		933	PL_runops = RUNOPS_DEFAULT;
		934	ENTER;
		935	SAVETMPS;
		936	EXTEND (SP, 3);
		937	PL_runops = RUNOPS_DEFAULT;
		938	PUSHMARK (SP);
		939	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		940	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		941	PUTBACK;
		942	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		943	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		944	SPAGAIN;
		945	FREETMPS;
		946	LEAVE;
		947	PL_runops = runops_trace;
		948	}
		949	}
		950	}
669	}	951	}
670	}	952	}
671		953
672	TAINT_NOT;	954	TAINT_NOT;
673	return 0;	955	return 0;
…		…
675		957
676	/* inject a fake call to Coro::State::_cctx_init into the execution */	958	/* inject a fake call to Coro::State::_cctx_init into the execution */
677	/* _cctx_init should be careful, as it could be called at almost any time */	959	/* _cctx_init should be careful, as it could be called at almost any time */
678	/* during execution of a perl program */	960	/* during execution of a perl program */
679	static void NOINLINE	961	static void NOINLINE
680	prepare_cctx (pTHX_ coro_cctx *cctx)	962	cctx_prepare (pTHX_ coro_cctx *cctx)
681	{	963	{
682	dSP;	964	dSP;
683	LOGOP myop;	965	LOGOP myop;
684		966
685	PL_top_env = &PL_start_env;	967	PL_top_env = &PL_start_env;
686		968
687	if (cctx->flags & CC_TRACE)	969	if (cctx->flags & CC_TRACE)
688	PL_runops = runops_coro;	970	PL_runops = runops_trace;
689		971
690	Zero (&myop, 1, LOGOP);	972	Zero (&myop, 1, LOGOP);
691	myop.op_next = PL_op;	973	myop.op_next = PL_op;
692	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	974	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
693		975
…		…
703		985
704	/*	986	/*
705	* this is a _very_ stripped down perl interpreter ;)	987	* this is a _very_ stripped down perl interpreter ;)
706	*/	988	*/
707	static void	989	static void
708	coro_run (void *arg)	990	cctx_run (void *arg)
709	{	991	{
710	dTHX;	992	dTHX;
711		993
712	/* coro_run is the alternative tail of transfer(), so unlock here. */	994	/* cctx_run is the alternative tail of transfer(), so unlock here. */
713	UNLOCK;	995	UNLOCK;
714		996
715	/* we now skip the entersub that lead to transfer() */	997	/* we now skip the entersub that lead to transfer() */
716	PL_op = PL_op->op_next;	998	PL_op = PL_op->op_next;
717		999
718	/* inject a fake subroutine call to cctx_init */	1000	/* inject a fake subroutine call to cctx_init */
719	prepare_cctx (aTHX_ (coro_cctx *)arg);	1001	cctx_prepare (aTHX_ (coro_cctx *)arg);
720		1002
721	/* somebody or something will hit me for both perl_run and PL_restartop */	1003	/* somebody or something will hit me for both perl_run and PL_restartop */
722	PL_restartop = PL_op;	1004	PL_restartop = PL_op;
723	perl_run (PL_curinterp);	1005	perl_run (PL_curinterp);
724		1006
…		…
743	++cctx_count;	1025	++cctx_count;
744		1026
745	Newz (0, cctx, 1, coro_cctx);	1027	Newz (0, cctx, 1, coro_cctx);
746		1028
747	#if HAVE_MMAP	1029	#if HAVE_MMAP
748
749	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1030	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
750	/* mmap supposedly does allocate-on-write for us */	1031	/* mmap supposedly does allocate-on-write for us */
751	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1032	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
752		1033
753	if (cctx->sptr != (void *)-1)	1034	if (cctx->sptr != (void *)-1)
…		…
774	stack_start = cctx->sptr;	1055	stack_start = cctx->sptr;
775	stack_size = cctx->ssize;	1056	stack_size = cctx->ssize;
776	}	1057	}
777		1058
778	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);	1059	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
779	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);	1060	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
780		1061
781	return cctx;	1062	return cctx;
782	}	1063	}
783		1064
784	static void	1065	static void
…		…
801	Safefree (cctx->sptr);	1082	Safefree (cctx->sptr);
802		1083
803	Safefree (cctx);	1084	Safefree (cctx);
804	}	1085	}
805		1086
		1087	/* wether this cctx should be destructed */
		1088	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1089
806	static coro_cctx *	1090	static coro_cctx *
807	cctx_get (pTHX)	1091	cctx_get (pTHX)
808	{	1092	{
809	while (cctx_first)	1093	while (expect_true (cctx_first))
810	{	1094	{
811	coro_cctx *cctx = cctx_first;	1095	coro_cctx *cctx = cctx_first;
812	cctx_first = cctx->next;	1096	cctx_first = cctx->next;
813	--cctx_idle;	1097	--cctx_idle;
814		1098
815	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))	1099	if (expect_true (!CCTX_EXPIRED (cctx)))
816	return cctx;	1100	return cctx;
817		1101
818	cctx_destroy (cctx);	1102	cctx_destroy (cctx);
819	}	1103	}
820		1104
…		…
823		1107
824	static void	1108	static void
825	cctx_put (coro_cctx *cctx)	1109	cctx_put (coro_cctx *cctx)
826	{	1110	{
827	/* free another cctx if overlimit */	1111	/* free another cctx if overlimit */
828	if (cctx_idle >= MAX_IDLE_CCTX)	1112	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
829	{	1113	{
830	coro_cctx *first = cctx_first;	1114	coro_cctx *first = cctx_first;
831	cctx_first = first->next;	1115	cctx_first = first->next;
832	--cctx_idle;	1116	--cctx_idle;
833		1117
…		…
839	cctx_first = cctx;	1123	cctx_first = cctx;
840	}	1124	}
841		1125
842	/** coroutine switching *****************************************************/	1126	/** coroutine switching *****************************************************/
843		1127
844	/* never call directly, always through the coro_state_transfer global variable */	1128	static void
		1129	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1130	{
		1131	if (expect_true (prev != next))
		1132	{
		1133	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1134	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1135
		1136	if (expect_false (next->flags & CF_RUNNING))
		1137	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1138
		1139	if (expect_false (next->flags & CF_DESTROYED))
		1140	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1141
		1142	#if !PERL_VERSION_ATLEAST (5,10,0)
		1143	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		1144	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1145	#endif
		1146	}
		1147	}
		1148
		1149	/* always use the TRANSFER macro */
845	static void NOINLINE	1150	static void NOINLINE
846	transfer (pTHX_ struct coro *prev, struct coro *next)	1151	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
847	{	1152	{
848	dSTACKLEVEL;	1153	dSTACKLEVEL;
		1154	static volatile int has_throw;
849		1155
850	/* sometimes transfer is only called to set idle_sp */	1156	/* sometimes transfer is only called to set idle_sp */
851	if (!next)	1157	if (expect_false (!next))
852	{	1158	{
853	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1159	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
854	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1160	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
855	}	1161	}
856	else if (prev != next)	1162	else if (expect_true (prev != next))
857	{	1163	{
858	coro_cctx *prev__cctx;	1164	coro_cctx *prev__cctx;
859		1165
860	if (prev->flags & CF_NEW)	1166	if (expect_false (prev->flags & CF_NEW))
861	{	1167	{
862	/* create a new empty context */	1168	/* create a new empty context */
863	Newz (0, prev->cctx, 1, coro_cctx);	1169	Newz (0, prev->cctx, 1, coro_cctx);
864	prev->flags &= ~CF_NEW;	1170	prev->flags &= ~CF_NEW;
865	prev->flags |= CF_RUNNING;	1171	prev->flags |= CF_RUNNING;
866	}	1172	}
867		1173
868	/*TODO: must not croak here */
869	if (!prev->flags & CF_RUNNING)
870	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
871
872	if (next->flags & CF_RUNNING)
873	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
874
875	if (next->flags & CF_DESTROYED)
876	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
877
878	prev->flags &= ~CF_RUNNING;	1174	prev->flags &= ~CF_RUNNING;
879	next->flags |= CF_RUNNING;	1175	next->flags |= CF_RUNNING;
880		1176
881	LOCK;	1177	LOCK;
882		1178
		1179	/* first get rid of the old state */
		1180	save_perl (aTHX_ prev);
		1181
883	if (next->flags & CF_NEW)	1182	if (expect_false (next->flags & CF_NEW))
884	{	1183	{
885	/* need to start coroutine */	1184	/* need to start coroutine */
886	next->flags &= ~CF_NEW;	1185	next->flags &= ~CF_NEW;
887	/* first get rid of the old state */
888	save_perl (aTHX_ prev);
889	/* setup coroutine call */	1186	/* setup coroutine call */
890	setup_coro (aTHX_ next);	1187	coro_setup (aTHX_ next);
891	}	1188	}
892	else	1189	else
893	{
894	/* coroutine already started */
895	save_perl (aTHX_ prev);
896	load_perl (aTHX_ next);	1190	load_perl (aTHX_ next);
897	}
898		1191
899	prev__cctx = prev->cctx;	1192	prev__cctx = prev->cctx;
900		1193
901	/* possibly "free" the cctx */	1194	/* possibly "free" the cctx */
		1195	if (expect_true (
902	if (prev__cctx->idle_sp == STACKLEVEL)	1196	prev__cctx->idle_sp == STACKLEVEL
		1197	&& !(prev__cctx->flags & CC_TRACE)
		1198	&& !force_cctx
		1199	))
903	{	1200	{
904	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1201	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
905	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1202	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
906		1203
907	prev->cctx = 0;	1204	prev->cctx = 0;
908		1205
		1206	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1207	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1208	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1209	if (!next->cctx)
		1210	next->cctx = cctx_get (aTHX);
		1211
909	cctx_put (prev__cctx);	1212	cctx_put (prev__cctx);
910	}	1213	}
911		1214
		1215	++next->usecount;
		1216
912	if (!next->cctx)	1217	if (expect_true (!next->cctx))
913	next->cctx = cctx_get (aTHX);	1218	next->cctx = cctx_get (aTHX);
914		1219
		1220	has_throw = !!next->throw;
		1221
915	if (prev__cctx != next->cctx)	1222	if (expect_false (prev__cctx != next->cctx))
916	{	1223	{
917	prev__cctx->top_env = PL_top_env;	1224	prev__cctx->top_env = PL_top_env;
918	PL_top_env = next->cctx->top_env;	1225	PL_top_env = next->cctx->top_env;
919	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1226	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
920	}	1227	}
921		1228
922	free_coro_mortal (aTHX);	1229	free_coro_mortal (aTHX);
923	UNLOCK;	1230	UNLOCK;
		1231
		1232	if (expect_false (has_throw))
		1233	{
		1234	struct coro *coro = SvSTATE (coro_current);
		1235
		1236	if (coro->throw)
		1237	{
		1238	SV *exception = coro->throw;
		1239	coro->throw = 0;
		1240	sv_setsv (ERRSV, exception);
		1241	croak (0);
		1242	}
		1243	}
924	}	1244	}
925	}	1245	}
926		1246
927	struct transfer_args	1247	struct transfer_args
928	{	1248	{
929	struct coro *prev, *next;	1249	struct coro *prev, *next;
930	};	1250	};
931		1251
		1252	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
932	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)	1253	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
933		1254
934	/** high level stuff ********************************************************/	1255	/** high level stuff ********************************************************/
935		1256
936	static int	1257	static int
937	coro_state_destroy (pTHX_ struct coro *coro)	1258	coro_state_destroy (pTHX_ struct coro *coro)
…		…
954		1275
955	if (coro->mainstack && coro->mainstack != main_mainstack)	1276	if (coro->mainstack && coro->mainstack != main_mainstack)
956	{	1277	{
957	struct coro temp;	1278	struct coro temp;
958		1279
959	assert (!(coro->flags & CF_RUNNING));
960
961	Zero (&temp, 1, struct coro);
962	temp.save = CORO_SAVE_ALL;
963
964	if (coro->flags & CF_RUNNING)	1280	if (coro->flags & CF_RUNNING)
965	croak ("FATAL: tried to destroy currently running coroutine");	1281	croak ("FATAL: tried to destroy currently running coroutine");
966		1282
967	save_perl (aTHX_ &temp);	1283	save_perl (aTHX_ &temp);
968	load_perl (aTHX_ coro);	1284	load_perl (aTHX_ coro);
969		1285
970	coro_destroy_stacks (aTHX);	1286	coro_destroy (aTHX_ coro);
971		1287
972	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */	1288	load_perl (aTHX_ &temp);
973		1289
974	coro->mainstack = 0;	1290	coro->slot = 0;
975	}	1291	}
976		1292
977	cctx_destroy (coro->cctx);	1293	cctx_destroy (coro->cctx);
978	SvREFCNT_dec (coro->args);	1294	SvREFCNT_dec (coro->args);
979		1295
…		…
1020	#else	1336	#else
1021	# define MGf_DUP 0	1337	# define MGf_DUP 0
1022	#endif	1338	#endif
1023	};	1339	};
1024		1340
1025	static struct coro *
1026	SvSTATE_ (pTHX_ SV *coro)
1027	{
1028	HV *stash;
1029	MAGIC *mg;
1030
1031	if (SvROK (coro))
1032	coro = SvRV (coro);
1033
1034	stash = SvSTASH (coro);
1035	if (stash != coro_stash && stash != coro_state_stash)
1036	{
1037	/* very slow, but rare, check */
1038	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
1039	croak ("Coro::State object required");
1040	}
1041
1042	mg = CORO_MAGIC (coro);
1043	return (struct coro *)mg->mg_ptr;
1044	}
1045
1046	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
1047
1048	static void	1341	static void
1049	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1342	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1050	{	1343	{
1051	ta->prev = SvSTATE (prev_sv);	1344	ta->prev = SvSTATE (prev_sv);
1052	ta->next = SvSTATE (next_sv);	1345	ta->next = SvSTATE (next_sv);
		1346	TRANSFER_CHECK (*ta);
1053	}	1347	}
1054		1348
1055	static void	1349	static void
1056	api_transfer (SV *prev_sv, SV *next_sv)	1350	api_transfer (SV *prev_sv, SV *next_sv)
1057	{	1351	{
1058	dTHX;	1352	dTHX;
1059	struct transfer_args ta;	1353	struct transfer_args ta;
1060		1354
1061	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1355	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1062	TRANSFER (ta);	1356	TRANSFER (ta, 1);
1063	}
1064
1065	static int
1066	api_save (SV *coro_sv, int new_save)
1067	{
1068	dTHX;
1069	struct coro *coro = SvSTATE (coro_sv);
1070	int old_save = coro->save;
1071
1072	if (new_save >= 0)
1073	coro->save = new_save;
1074
1075	return old_save;
1076	}	1357	}
1077		1358
1078	/** Coro ********************************************************************/	1359	/** Coro ********************************************************************/
1079		1360
1080	static void	1361	static void
…		…
1082	{	1363	{
1083	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1364	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1084	}	1365	}
1085		1366
1086	static SV *	1367	static SV *
1087	coro_deq (pTHX_ int min_prio)	1368	coro_deq (pTHX)
1088	{	1369	{
1089	int prio = PRIO_MAX - PRIO_MIN;	1370	int prio;
1090		1371
1091	min_prio -= PRIO_MIN;
1092	if (min_prio < 0)
1093	min_prio = 0;
1094
1095	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1372	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1096	if (AvFILLp (coro_ready [prio]) >= 0)	1373	if (AvFILLp (coro_ready [prio]) >= 0)
1097	return av_shift (coro_ready [prio]);	1374	return av_shift (coro_ready [prio]);
1098		1375
1099	return 0;	1376	return 0;
1100	}	1377	}
…		…
1136	SV *prev_sv, *next_sv;	1413	SV *prev_sv, *next_sv;
1137		1414
1138	for (;;)	1415	for (;;)
1139	{	1416	{
1140	LOCK;	1417	LOCK;
1141	next_sv = coro_deq (aTHX_ PRIO_MIN);	1418	next_sv = coro_deq (aTHX);
1142		1419
1143	/* nothing to schedule: call the idle handler */	1420	/* nothing to schedule: call the idle handler */
1144	if (!next_sv)	1421	if (expect_false (!next_sv))
1145	{	1422	{
1146	dSP;	1423	dSP;
1147	UNLOCK;	1424	UNLOCK;
1148		1425
1149	ENTER;	1426	ENTER;
1150	SAVETMPS;	1427	SAVETMPS;
1151		1428
1152	PUSHMARK (SP);	1429	PUSHMARK (SP);
1153	PUTBACK;	1430	PUTBACK;
1154	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1431	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1432	SPAGAIN;
1155		1433
1156	FREETMPS;	1434	FREETMPS;
1157	LEAVE;	1435	LEAVE;
1158	continue;	1436	continue;
1159	}	1437	}
1160		1438
1161	ta->next = SvSTATE (next_sv);	1439	ta->next = SvSTATE (next_sv);
1162		1440
1163	/* cannot transfer to destroyed coros, skip and look for next */	1441	/* cannot transfer to destroyed coros, skip and look for next */
1164	if (ta->next->flags & CF_DESTROYED)	1442	if (expect_false (ta->next->flags & CF_DESTROYED))
1165	{	1443	{
1166	UNLOCK;	1444	UNLOCK;
1167	SvREFCNT_dec (next_sv);	1445	SvREFCNT_dec (next_sv);
1168	/* coro_nready is already taken care of by destroy */	1446	/* coro_nready is already taken care of by destroy */
1169	continue;	1447	continue;
…		…
1174	break;	1452	break;
1175	}	1453	}
1176		1454
1177	/* free this only after the transfer */	1455	/* free this only after the transfer */
1178	prev_sv = SvRV (coro_current);	1456	prev_sv = SvRV (coro_current);
1179	SvRV_set (coro_current, next_sv);
1180	ta->prev = SvSTATE (prev_sv);	1457	ta->prev = SvSTATE (prev_sv);
1181		1458	TRANSFER_CHECK (*ta);
1182	assert (ta->next->flags & CF_READY);	1459	assert (ta->next->flags & CF_READY);
1183	ta->next->flags &= ~CF_READY;	1460	ta->next->flags &= ~CF_READY;
		1461	SvRV_set (coro_current, next_sv);
1184		1462
1185	LOCK;	1463	LOCK;
1186	free_coro_mortal (aTHX);	1464	free_coro_mortal (aTHX);
1187	coro_mortal = prev_sv;	1465	coro_mortal = prev_sv;
1188	UNLOCK;	1466	UNLOCK;
…		…
1214	{	1492	{
1215	dTHX;	1493	dTHX;
1216	struct transfer_args ta;	1494	struct transfer_args ta;
1217		1495
1218	prepare_schedule (aTHX_ &ta);	1496	prepare_schedule (aTHX_ &ta);
1219	TRANSFER (ta);	1497	TRANSFER (ta, 1);
1220	}	1498	}
1221		1499
1222	static int	1500	static int
1223	api_cede (void)	1501	api_cede (void)
1224	{	1502	{
1225	dTHX;	1503	dTHX;
1226	struct transfer_args ta;	1504	struct transfer_args ta;
1227		1505
1228	prepare_cede (aTHX_ &ta);	1506	prepare_cede (aTHX_ &ta);
1229		1507
1230	if (ta.prev != ta.next)	1508	if (expect_true (ta.prev != ta.next))
1231	{	1509	{
1232	TRANSFER (ta);	1510	TRANSFER (ta, 1);
1233	return 1;	1511	return 1;
1234	}	1512	}
1235	else	1513	else
1236	return 0;	1514	return 0;
1237	}	1515	}
…		…
1242	dTHX;	1520	dTHX;
1243	struct transfer_args ta;	1521	struct transfer_args ta;
1244		1522
1245	if (prepare_cede_notself (aTHX_ &ta))	1523	if (prepare_cede_notself (aTHX_ &ta))
1246	{	1524	{
1247	TRANSFER (ta);	1525	TRANSFER (ta, 1);
1248	return 1;	1526	return 1;
1249	}	1527	}
1250	else	1528	else
1251	return 0;	1529	return 0;
1252	}	1530	}
1253		1531
		1532	static void
		1533	api_trace (SV *coro_sv, int flags)
		1534	{
		1535	dTHX;
		1536	struct coro *coro = SvSTATE (coro_sv);
		1537
		1538	if (flags & CC_TRACE)
		1539	{
		1540	if (!coro->cctx)
		1541	coro->cctx = cctx_new ();
		1542	else if (!(coro->cctx->flags & CC_TRACE))
		1543	croak ("cannot enable tracing on coroutine with custom stack");
		1544
		1545	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1546	}
		1547	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1548	{
		1549	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1550
		1551	if (coro->flags & CF_RUNNING)
		1552	PL_runops = RUNOPS_DEFAULT;
		1553	else
		1554	coro->slot->runops = RUNOPS_DEFAULT;
		1555	}
		1556	}
		1557
1254	MODULE = Coro::State PACKAGE = Coro::State	1558	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1255		1559
1256	PROTOTYPES: DISABLE	1560	PROTOTYPES: DISABLE
1257		1561
1258	BOOT:	1562	BOOT:
1259	{	1563	{
1260	#ifdef USE_ITHREADS	1564	#ifdef USE_ITHREADS
1261	MUTEX_INIT (&coro_mutex);	1565	MUTEX_INIT (&coro_mutex);
1262	#endif	1566	#endif
1263	BOOT_PAGESIZE;	1567	BOOT_PAGESIZE;
1264		1568
		1569	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1570	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1571
		1572	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1573	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1574	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1575	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1576
		1577	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1578	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1579	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1580
1265	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1581	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1266		1582
1267	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1583	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1268	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));	1584	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1269	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1270	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1271	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1272	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));	1585	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1273	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1586	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1274		1587
1275	main_mainstack = PL_mainstack;	1588	main_mainstack = PL_mainstack;
1276	main_top_env = PL_top_env;	1589	main_top_env = PL_top_env;
1277		1590
1278	while (main_top_env->je_prev)	1591	while (main_top_env->je_prev)
1279	main_top_env = main_top_env->je_prev;	1592	main_top_env = main_top_env->je_prev;
1280		1593
1281	coroapi.ver = CORO_API_VERSION;	1594	coroapi.ver = CORO_API_VERSION;
		1595	coroapi.rev = CORO_API_REVISION;
1282	coroapi.transfer = api_transfer;	1596	coroapi.transfer = api_transfer;
1283		1597
1284	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1598	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1285	}	1599	}
1286		1600
1287	SV *	1601	SV *
1288	new (char *klass, ...)	1602	new (char *klass, ...)
1289	CODE:	1603	CODE:
1290	{	1604	{
1291	struct coro *coro;	1605	struct coro *coro;
		1606	MAGIC *mg;
1292	HV *hv;	1607	HV *hv;
1293	int i;	1608	int i;
1294		1609
1295	Newz (0, coro, 1, struct coro);	1610	Newz (0, coro, 1, struct coro);
1296	coro->args = newAV ();	1611	coro->args = newAV ();
1297	coro->save = CORO_SAVE_DEF;
1298	coro->flags = CF_NEW;	1612	coro->flags = CF_NEW;
1299		1613
1300	if (coro_first) coro_first->prev = coro;	1614	if (coro_first) coro_first->prev = coro;
1301	coro->next = coro_first;	1615	coro->next = coro_first;
1302	coro_first = coro;	1616	coro_first = coro;
1303		1617
1304	coro->hv = hv = newHV ();	1618	coro->hv = hv = newHV ();
1305	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1619	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1620	mg->mg_flags |= MGf_DUP;
1306	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1621	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1307		1622
		1623	av_extend (coro->args, items - 1);
1308	for (i = 1; i < items; i++)	1624	for (i = 1; i < items; i++)
1309	av_push (coro->args, newSVsv (ST (i)));	1625	av_push (coro->args, newSVsv (ST (i)));
1310	}	1626	}
1311	OUTPUT:	1627	OUTPUT:
1312	RETVAL	1628	RETVAL
1313		1629
1314	int	1630	# these not obviously related functions are all rolled into the same xs
1315	save (SV *coro, int new_save = -1)	1631	# function to increase chances that they all will call transfer with the same
1316	CODE:	1632	# stack offset
1317	RETVAL = api_save (coro, new_save);
1318	OUTPUT:
1319	RETVAL
1320
1321	int
1322	save_also (SV *coro_sv, int save_also)
1323	CODE:
1324	{
1325	struct coro *coro = SvSTATE (coro_sv);
1326	RETVAL = coro->save;
1327	coro->save |= save_also;
1328	}
1329	OUTPUT:
1330	RETVAL
1331
1332	void	1633	void
1333	_set_stacklevel (...)	1634	_set_stacklevel (...)
1334	ALIAS:	1635	ALIAS:
1335	Coro::State::transfer = 1	1636	Coro::State::transfer = 1
1336	Coro::schedule = 2	1637	Coro::schedule = 2
…		…
1338	Coro::cede_notself = 4	1639	Coro::cede_notself = 4
1339	CODE:	1640	CODE:
1340	{	1641	{
1341	struct transfer_args ta;	1642	struct transfer_args ta;
1342		1643
		1644	PUTBACK;
1343	switch (ix)	1645	switch (ix)
1344	{	1646	{
1345	case 0:	1647	case 0:
1346	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1648	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1347	ta.next = 0;	1649	ta.next = 0;
…		…
1366	if (!prepare_cede_notself (aTHX_ &ta))	1668	if (!prepare_cede_notself (aTHX_ &ta))
1367	XSRETURN_EMPTY;	1669	XSRETURN_EMPTY;
1368		1670
1369	break;	1671	break;
1370	}	1672	}
		1673	SPAGAIN;
1371		1674
1372	BARRIER;	1675	BARRIER;
		1676	PUTBACK;
1373	TRANSFER (ta);	1677	TRANSFER (ta, 0);
1374		1678	SPAGAIN; /* might be the sp of a different coroutine now */
1375	if (GIMME_V != G_VOID && ta.next != ta.prev)	1679	/* be extra careful not to ever do anything after TRANSFER */
1376	XSRETURN_YES;
1377	}	1680	}
1378		1681
1379	bool	1682	bool
1380	_destroy (SV *coro_sv)	1683	_destroy (SV *coro_sv)
1381	CODE:	1684	CODE:
…		…
1430	CODE:	1733	CODE:
1431	{	1734	{
1432	if (coro->mainstack)	1735	if (coro->mainstack)
1433	{	1736	{
1434	struct coro temp;	1737	struct coro temp;
1435	Zero (&temp, 1, struct coro);
1436	temp.save = CORO_SAVE_ALL;
1437		1738
1438	if (!(coro->flags & CF_RUNNING))	1739	if (!(coro->flags & CF_RUNNING))
1439	{	1740	{
		1741	PUTBACK;
1440	save_perl (aTHX_ &temp);	1742	save_perl (aTHX_ &temp);
1441	load_perl (aTHX_ coro);	1743	load_perl (aTHX_ coro);
1442	}	1744	}
1443		1745
1444	{	1746	{
1445	dSP;	1747	dSP;
1446	ENTER;	1748	ENTER;
1447	SAVETMPS;	1749	SAVETMPS;
		1750	PUTBACK;
		1751	PUSHSTACK;
1448	PUSHMARK (SP);	1752	PUSHMARK (SP);
1449	PUTBACK;	1753
1450	if (ix)	1754	if (ix)
1451	eval_sv (coderef, 0);	1755	eval_sv (coderef, 0);
1452	else	1756	else
1453	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);	1757	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1758
		1759	POPSTACK;
1454	SPAGAIN;	1760	SPAGAIN;
1455	FREETMPS;	1761	FREETMPS;
1456	LEAVE;	1762	LEAVE;
1457	PUTBACK;	1763	PUTBACK;
1458	}	1764	}
1459		1765
1460	if (!(coro->flags & CF_RUNNING))	1766	if (!(coro->flags & CF_RUNNING))
1461	{	1767	{
1462	save_perl (aTHX_ coro);	1768	save_perl (aTHX_ coro);
1463	load_perl (aTHX_ &temp);	1769	load_perl (aTHX_ &temp);
		1770	SPAGAIN;
1464	}	1771	}
1465	}	1772	}
1466	}	1773	}
1467		1774
1468	SV *	1775	SV *
1469	is_ready (Coro::State coro)	1776	is_ready (Coro::State coro)
1470	PROTOTYPE: $	1777	PROTOTYPE: $
1471	ALIAS:	1778	ALIAS:
1472	is_ready = CF_READY	1779	is_ready = CF_READY
…		…
1477	RETVAL = boolSV (coro->flags & ix);	1784	RETVAL = boolSV (coro->flags & ix);
1478	OUTPUT:	1785	OUTPUT:
1479	RETVAL	1786	RETVAL
1480		1787
1481	void	1788	void
1482	trace (Coro::State coro, int enable = 0)	1789	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
1483	CODE:
1484	if (enable)
1485	{
1486	if (coro->cctx && coro->cctx->flags & CC_TRACE)
1487	XSRETURN_EMPTY;
1488
1489	if (coro->flags & CF_RUNNING)
1490	croak ("cannot enable tracing on running coroutine");
1491
1492	if (coro->cctx)
1493	croak ("cannot enable tracing on coroutine with custom stack");
1494
1495	coro->cctx = cctx_new ();
1496	coro->cctx->flags |= CC_TRACE;
1497	}
1498	else
1499	if (coro->cctx && coro->cctx->flags & CC_TRACE)
1500	{
1501	coro->cctx->flags &= ~CC_TRACE;
1502	coro->cctx->flags |= CC_NOREUSE;
1503	}
1504		1790
1505	SV *	1791	SV *
1506	has_stack (Coro::State coro)	1792	has_stack (Coro::State coro)
1507	PROTOTYPE: $	1793	PROTOTYPE: $
1508	CODE:	1794	CODE:
1509	RETVAL = boolSV (!!coro->cctx);	1795	RETVAL = boolSV (!!coro->cctx);
1510	OUTPUT:	1796	OUTPUT:
1511	RETVAL	1797	RETVAL
1512		1798
		1799	int
		1800	is_traced (Coro::State coro)
		1801	PROTOTYPE: $
		1802	CODE:
		1803	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1804	OUTPUT:
		1805	RETVAL
		1806
1513	IV	1807	IV
1514	rss (Coro::State coro)	1808	rss (Coro::State coro)
1515	PROTOTYPE: $	1809	PROTOTYPE: $
		1810	ALIAS:
		1811	usecount = 1
1516	CODE:	1812	CODE:
1517	RETVAL = coro_rss (coro);	1813	switch (ix)
		1814	{
		1815	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1816	case 1: RETVAL = coro->usecount; break;
		1817	}
1518	OUTPUT:	1818	OUTPUT:
1519	RETVAL	1819	RETVAL
1520		1820
		1821	void
		1822	force_cctx ()
		1823	CODE:
		1824	struct coro *coro = SvSTATE (coro_current);
		1825	coro->cctx->idle_sp = 0;
1521		1826
1522	MODULE = Coro::State PACKAGE = Coro	1827	MODULE = Coro::State PACKAGE = Coro
1523		1828
1524	BOOT:	1829	BOOT:
1525	{	1830	{
1526	int i;	1831	int i;
1527		1832
1528	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);	1833	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1529	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);	1834	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1530	av_async_pool = get_av ("Coro::async_pool", TRUE);	1835	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1531		1836
1532	coro_current = get_sv ("Coro::current", FALSE);	1837	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1533	SvREADONLY_on (coro_current);	1838	SvREADONLY_on (coro_current);
1534		1839
1535	coro_stash = gv_stashpv ("Coro", TRUE);	1840	coro_stash = gv_stashpv ("Coro", TRUE);
1536		1841
1537	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1842	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1538	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1843	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1539	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1844	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1540	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1845	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
…		…
1543		1848
1544	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1849	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1545	coro_ready[i] = newAV ();	1850	coro_ready[i] = newAV ();
1546		1851
1547	{	1852	{
1548	SV *sv = perl_get_sv("Coro::API", 1);	1853	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1854	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1549		1855
1550	coroapi.schedule = api_schedule;	1856	coroapi.schedule = api_schedule;
1551	coroapi.save = api_save;
1552	coroapi.cede = api_cede;	1857	coroapi.cede = api_cede;
1553	coroapi.cede_notself = api_cede_notself;	1858	coroapi.cede_notself = api_cede_notself;
1554	coroapi.ready = api_ready;	1859	coroapi.ready = api_ready;
1555	coroapi.is_ready = api_is_ready;	1860	coroapi.is_ready = api_is_ready;
1556	coroapi.nready = &coro_nready;	1861	coroapi.nready = &coro_nready;
…		…
1605	CODE:	1910	CODE:
1606	RETVAL = coro_nready;	1911	RETVAL = coro_nready;
1607	OUTPUT:	1912	OUTPUT:
1608	RETVAL	1913	RETVAL
1609		1914
		1915	void
		1916	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1917	PROTOTYPE: $;$
		1918	CODE:
		1919	SvREFCNT_dec (self->throw);
		1920	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1921
		1922	void
		1923	swap_defsv (Coro::State self)
		1924	PROTOTYPE: $
		1925	ALIAS:
		1926	swap_defav = 1
		1927	CODE:
		1928	if (!self->slot)
		1929	croak ("cannot swap state with coroutine that has no saved state");
		1930	else
		1931	{
		1932	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1933	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		1934
		1935	SV *tmp = *src; *src = *dst; *dst = tmp;
		1936	}
		1937
1610	# for async_pool speedup	1938	# for async_pool speedup
1611	void	1939	void
1612	_pool_1 (SV *cb)	1940	_pool_1 (SV *cb)
1613	CODE:	1941	CODE:
1614	{	1942	{
1615	int i, len;	1943	struct coro *coro = SvSTATE (coro_current);
1616	HV *hv = (HV *)SvRV (coro_current);	1944	HV *hv = (HV *)SvRV (coro_current);
1617	AV *defav = GvAV (PL_defgv);	1945	AV *defav = GvAV (PL_defgv);
1618	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	1946	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1619	AV *invoke_av;	1947	AV *invoke_av;
		1948	int i, len;
1620		1949
1621	if (!invoke)	1950	if (!invoke)
		1951	{
		1952	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1622	croak ("\3terminate\2\n");	1953	croak ("\3async_pool terminate\2\n");
		1954	}
		1955
		1956	SvREFCNT_dec (coro->saved_deffh);
		1957	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1623		1958
1624	hv_store (hv, "desc", sizeof ("desc") - 1,	1959	hv_store (hv, "desc", sizeof ("desc") - 1,
1625	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);	1960	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1626		1961
1627	invoke_av = (AV *)SvRV (invoke);	1962	invoke_av = (AV *)SvRV (invoke);
…		…
1645	{	1980	{
1646	struct coro *coro = SvSTATE (coro_current);	1981	struct coro *coro = SvSTATE (coro_current);
1647		1982
1648	sv_setsv (cb, &PL_sv_undef);	1983	sv_setsv (cb, &PL_sv_undef);
1649		1984
		1985	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1986	coro->saved_deffh = 0;
		1987
1650	if (coro_rss (coro) > SvIV (sv_pool_rss)	1988	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1651	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))	1989	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1990	{
		1991	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1652	croak ("\3terminate\2\n");	1992	croak ("\3async_pool terminate\2\n");
		1993	}
1653		1994
1654	av_clear (GvAV (PL_defgv));	1995	av_clear (GvAV (PL_defgv));
1655	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,	1996	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1656	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	1997	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1657	coro->save = CORO_SAVE_DEF;	1998
1658	coro->prio = 0;	1999	coro->prio = 0;
		2000
		2001	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		2002	api_trace (coro_current, 0);
		2003
1659	av_push (av_async_pool, newSVsv (coro_current));	2004	av_push (av_async_pool, newSVsv (coro_current));
1660	}	2005	}
1661		2006
1662		2007
1663	MODULE = Coro::State PACKAGE = Coro::AIO	2008	MODULE = Coro::State PACKAGE = Coro::AIO

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