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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.146 by root, Sat Mar 17 19:51:57 2007 UTC vs.
Revision 1.231 by root, Thu Apr 24 10:31:59 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	#include <setjmp.h>
		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
…		…
88	/* prefer perl internal functions over our own? */	111	/* prefer perl internal functions over our own? */
89	#ifndef CORO_PREFER_PERL_FUNCTIONS	112	#ifndef CORO_PREFER_PERL_FUNCTIONS
90	# define CORO_PREFER_PERL_FUNCTIONS 0	113	# define CORO_PREFER_PERL_FUNCTIONS 0
91	#endif	114	#endif
92		115
93	/* The next macro should declare a variable stacklevel that contains and approximation	116	/* The next macros try to return the current stack pointer, in an as
94	* to the current C stack pointer. Its property is that it changes with each call	117	* portable way as possible. */
95	* and should be unique. */
96	#define dSTACKLEVEL int stacklevel	118	#define dSTACKLEVEL volatile char stacklevel
97	#define STACKLEVEL ((void *)&stacklevel)	119	#define STACKLEVEL ((void *)&stacklevel)
98		120
99	#define IN_DESTRUCT (PL_main_cv == Nullcv)	121	#define IN_DESTRUCT (PL_main_cv == Nullcv)
100		122
101	#if __GNUC__ >= 3	123	#if __GNUC__ >= 3
102	# define attribute(x) __attribute__(x)	124	# define attribute(x) __attribute__(x)
103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	125	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		126	# define expect(expr,value) __builtin_expect ((expr),(value))
104	#else	127	#else
105	# define attribute(x)	128	# define attribute(x)
106	# define BARRIER	129	# define BARRIER
		130	# define expect(expr,value) (expr)
107	#endif	131	#endif
		132
		133	#define expect_false(expr) expect ((expr) != 0, 0)
		134	#define expect_true(expr) expect ((expr) != 0, 1)
108		135
109	#define NOINLINE attribute ((noinline))	136	#define NOINLINE attribute ((noinline))
110		137
111	#include "CoroAPI.h"	138	#include "CoroAPI.h"
112		139
…		…
129	};	156	};
130		157
131	static size_t coro_stacksize = CORO_STACKSIZE;	158	static size_t coro_stacksize = CORO_STACKSIZE;
132	static struct CoroAPI coroapi;	159	static struct CoroAPI coroapi;
133	static AV *main_mainstack; /* used to differentiate between $main and others */	160	static AV *main_mainstack; /* used to differentiate between $main and others */
		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 */
		170
		171	/* async_pool helper stuff */
		172	static SV *sv_pool_rss;
		173	static SV *sv_pool_size;
		174	static AV *av_async_pool;
136		175
137	static struct coro_cctx *cctx_first;	176	static struct coro_cctx *cctx_first;
138	static int cctx_count, cctx_idle;	177	static int cctx_count, cctx_idle;
		178
		179	enum {
		180	CC_MAPPED = 0x01,
		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,
		186	};
139		187
140	/* this is a structure representing a c-level coroutine */	188	/* this is a structure representing a c-level coroutine */
141	typedef struct coro_cctx {	189	typedef struct coro_cctx {
142	struct coro_cctx *next;	190	struct coro_cctx *next;
143		191
…		…
152	coro_context cctx;	200	coro_context cctx;
153		201
154	#if CORO_USE_VALGRIND	202	#if CORO_USE_VALGRIND
155	int valgrind_id;	203	int valgrind_id;
156	#endif	204	#endif
157	char inuse, mapped;	205	unsigned char flags;
158	} coro_cctx;	206	} coro_cctx;
159		207
160	enum {	208	enum {
161	CF_RUNNING = 0x0001, /* coroutine is running */	209	CF_RUNNING = 0x0001, /* coroutine is running */
162	CF_READY = 0x0002, /* coroutine is ready */	210	CF_READY = 0x0002, /* coroutine is ready */
163	CF_NEW = 0x0004, /* has never been switched to */	211	CF_NEW = 0x0004, /* has never been switched to */
164	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	212	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
165	};	213	};
166		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
167	/* this is a structure representing a perl-level coroutine */	228	/* this is a structure representing a perl-level coroutine */
168	struct coro {	229	struct coro {
169	/* the c coroutine allocated to this perl coroutine, if any */	230	/* the c coroutine allocated to this perl coroutine, if any */
170	coro_cctx *cctx;	231	coro_cctx *cctx;
171		232
		233	/* process data */
		234	AV *mainstack;
		235	perl_slots *slot; /* basically the saved sp */
		236
172	/* data associated with this coroutine (initial args) */	237	AV *args; /* data associated with this coroutine (initial args) */
173	AV *args;	238	int refcnt; /* coroutines are refcounted, yes */
174	int refcnt;
175	int save; /* CORO_SAVE flags */
176	int flags; /* CF_ flags */	239	int flags; /* CF_ flags */
		240	HV *hv; /* the perl hash associated with this coro, if any */
177		241
178	/* optionally saved, might be zero */	242	/* statistics */
179	AV *defav; /* @_ */	243	int usecount; /* number of transfers to this coro */
180	SV *defsv; /* $_ */
181	SV *errsv; /* $@ */
182	SV *irssv; /* $/ */
183	SV *irssv_sv; /* real $/ cache */
184
185	#define VAR(name,type) type name;
186	# include "state.h"
187	#undef VAR
188		244
189	/* coro process data */	245	/* coro process data */
190	int prio;	246	int prio;
		247	SV *throw; /* exception to be thrown */
		248
		249	/* async_pool */
		250	SV *saved_deffh;
		251
		252	/* linked list */
		253	struct coro *next, *prev;
191	};	254	};
192		255
193	typedef struct coro *Coro__State;	256	typedef struct coro *Coro__State;
194	typedef struct coro *Coro__State_or_hashref;	257	typedef struct coro *Coro__State_or_hashref;
195		258
…		…
204		267
205	/* for Coro.pm */	268	/* for Coro.pm */
206	static SV *coro_current;	269	static SV *coro_current;
207	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	270	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
208	static int coro_nready;	271	static int coro_nready;
		272	static struct coro *coro_first;
209		273
210	/** lowlevel stuff **********************************************************/	274	/** lowlevel stuff **********************************************************/
		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	}
211		305
212	static AV *	306	static AV *
213	coro_clone_padlist (pTHX_ CV *cv)	307	coro_clone_padlist (pTHX_ CV *cv)
214	{	308	{
215	AV *padlist = CvPADLIST (cv);	309	AV *padlist = CvPADLIST (cv);
216	AV *newpadlist, *newpad;	310	AV *newpadlist, *newpad;
217		311
218	newpadlist = newAV ();	312	newpadlist = newAV ();
219	AvREAL_off (newpadlist);	313	AvREAL_off (newpadlist);
220	#if PERL_VERSION_ATLEAST (5,9,0)	314	#if PERL_VERSION_ATLEAST (5,10,0)
221	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);	315	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
222	#else	316	#else
223	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	317	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
224	#endif	318	#endif
225	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	319	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
…		…
263		357
264	/* casting is fun. */	358	/* casting is fun. */
265	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	359	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
266	free_padlist (aTHX_ padlist);	360	free_padlist (aTHX_ padlist);
267		361
268	SvREFCNT_dec (av);
269
270	return 0;	362	return 0;
271	}	363	}
272		364
273	#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
274		367
275	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	};
276		372
277	#define CORO_MAGIC(cv) \	373	#define CORO_MAGIC(sv,type) \
278	SvMAGIC (cv) \	374	SvMAGIC (sv) \
279	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	375	? SvMAGIC (sv)->mg_type == type \
280	? SvMAGIC (cv) \	376	? SvMAGIC (sv) \
281	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	377	: mg_find (sv, type) \
282	: 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))
283		408
284	/* the next two functions merely cache the padlists */	409	/* the next two functions merely cache the padlists */
285	static void	410	static void
286	get_padlist (pTHX_ CV *cv)	411	get_padlist (pTHX_ CV *cv)
287	{	412	{
288	MAGIC *mg = CORO_MAGIC (cv);	413	MAGIC *mg = CORO_MAGIC_cv (cv);
289	AV *av;	414	AV *av;
290		415
291	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	416	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
292	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	417	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
293	else	418	else
294	{	419	{
295	#if CORO_PREFER_PERL_FUNCTIONS	420	#if CORO_PREFER_PERL_FUNCTIONS
296	/* this is probably cleaner, but also slower? */	421	/* this is probably cleaner, but also slower? */
…		…
305	}	430	}
306		431
307	static void	432	static void
308	put_padlist (pTHX_ CV *cv)	433	put_padlist (pTHX_ CV *cv)
309	{	434	{
310	MAGIC *mg = CORO_MAGIC (cv);	435	MAGIC *mg = CORO_MAGIC_cv (cv);
311	AV *av;	436	AV *av;
312		437
313	if (!mg)	438	if (expect_false (!mg))
314	{	439	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
315	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
316	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
317	mg->mg_virtual = &vtbl_coro;
318	mg->mg_obj = (SV *)newAV ();
319	}
320		440
321	av = (AV *)mg->mg_obj;	441	av = (AV *)mg->mg_obj;
322		442
323	if (AvFILLp (av) >= AvMAX (av))	443	if (expect_false (AvFILLp (av) >= AvMAX (av)))
324	av_extend (av, AvMAX (av) + 1);	444	av_extend (av, AvMAX (av) + 1);
325		445
326	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	446	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
327	}	447	}
328		448
329	/** load & save, init *******************************************************/	449	/** load & save, init *******************************************************/
330
331	#define SB do {
332	#define SE } while (0)
333
334	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
335		450
336	static void	451	static void
337	load_perl (pTHX_ Coro__State c)	452	load_perl (pTHX_ Coro__State c)
338	{	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
339	#define VAR(name,type) PL_ ## name = c->name;	464	#define VAR(name,type) PL_ ## name = slot->name;
340	# include "state.h"	465	# include "state.h"
341	#undef VAR	466	#undef VAR
342
343	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
344	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
345	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
346	if (c->irssv)
347	{
348	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
349	SvREFCNT_dec (c->irssv);
350	else
351	{
352	REPLACE_SV (PL_rs, c->irssv);
353	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
354	sv_setsv (c->irssv_sv, PL_rs);
355	}
356	}
357		467
358	{	468	{
359	dSP;	469	dSP;
		470
360	CV *cv;	471	CV *cv;
361		472
362	/* now do the ugly restore mess */	473	/* now do the ugly restore mess */
363	while ((cv = (CV *)POPs))	474	while (expect_true (cv = (CV *)POPs))
364	{	475	{
365	put_padlist (aTHX_ cv); /* mark this padlist as available */	476	put_padlist (aTHX_ cv); /* mark this padlist as available */
366	CvDEPTH (cv) = PTR2IV (POPs);	477	CvDEPTH (cv) = PTR2IV (POPs);
367	CvPADLIST (cv) = (AV *)POPs;	478	CvPADLIST (cv) = (AV *)POPs;
368	}	479	}
369		480
370	PUTBACK;	481	PUTBACK;
371	}	482	}
372	assert (!PL_comppad || AvARRAY (PL_comppad));//D
373	}	483	}
374		484
375	static void	485	static void
376	save_perl (pTHX_ Coro__State c)	486	save_perl (pTHX_ Coro__State c)
377	{	487	{
378	assert (!PL_comppad || AvARRAY (PL_comppad));//D
379	{	488	{
380	dSP;	489	dSP;
381	I32 cxix = cxstack_ix;	490	I32 cxix = cxstack_ix;
382	PERL_CONTEXT *ccstk = cxstack;	491	PERL_CONTEXT *ccstk = cxstack;
383	PERL_SI *top_si = PL_curstackinfo;	492	PERL_SI *top_si = PL_curstackinfo;
…		…
385	/*	494	/*
386	* the worst thing you can imagine happens first - we have to save	495	* the worst thing you can imagine happens first - we have to save
387	* (and reinitialize) all cv's in the whole callchain :(	496	* (and reinitialize) all cv's in the whole callchain :(
388	*/	497	*/
389		498
390	EXTEND (SP, 3 + 1);
391	PUSHs (Nullsv);	499	XPUSHs (Nullsv);
392	/* this loop was inspired by pp_caller */	500	/* this loop was inspired by pp_caller */
393	for (;;)	501	for (;;)
394	{	502	{
395	while (cxix >= 0)	503	while (expect_true (cxix >= 0))
396	{	504	{
397	PERL_CONTEXT *cx = &ccstk[cxix--];	505	PERL_CONTEXT *cx = &ccstk[cxix--];
398		506
399	if (CxTYPE (cx) == CXt_SUB)	507	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
400	{	508	{
401	CV *cv = cx->blk_sub.cv;	509	CV *cv = cx->blk_sub.cv;
402		510
403	if (CvDEPTH (cv))	511	if (expect_true (CvDEPTH (cv)))
404	{	512	{
405	EXTEND (SP, 3);	513	EXTEND (SP, 3);
406	PUSHs ((SV *)CvPADLIST (cv));	514	PUSHs ((SV *)CvPADLIST (cv));
407	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	515	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
408	PUSHs ((SV *)cv);	516	PUSHs ((SV *)cv);
…		…
411	get_padlist (aTHX_ cv);	519	get_padlist (aTHX_ cv);
412	}	520	}
413	}	521	}
414	}	522	}
415		523
416	if (top_si->si_type == PERLSI_MAIN)	524	if (expect_true (top_si->si_type == PERLSI_MAIN))
417	break;	525	break;
418		526
419	top_si = top_si->si_prev;	527	top_si = top_si->si_prev;
420	ccstk = top_si->si_cxstack;	528	ccstk = top_si->si_cxstack;
421	cxix = top_si->si_cxix;	529	cxix = top_si->si_cxix;
422	}	530	}
423		531
424	PUTBACK;	532	PUTBACK;
425	}	533	}
426		534
427	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 */
428	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	536	/* we manually unroll here, as usually 2 slots is enough */
429	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	537	if (SLOT_COUNT >= 1) CXINC;
430	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	538	if (SLOT_COUNT >= 2) CXINC;
		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 */
431		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
432	#define VAR(name,type)c->name = PL_ ## name;	557	#define VAR(name,type) slot->name = PL_ ## name;
433	# include "state.h"	558	# include "state.h"
434	#undef VAR	559	#undef VAR
		560	}
435	}	561	}
436		562
437	/*	563	/*
438	* allocate various perl stacks. This is an exact copy	564	* allocate various perl stacks. This is an exact copy
439	* of perl.c:init_stacks, except that it uses less memory	565	* of perl.c:init_stacks, except that it uses less memory
…		…
444	# define coro_init_stacks init_stacks	570	# define coro_init_stacks init_stacks
445	#else	571	#else
446	static void	572	static void
447	coro_init_stacks (pTHX)	573	coro_init_stacks (pTHX)
448	{	574	{
449	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	575	PL_curstackinfo = new_stackinfo(32, 8);
450	PL_curstackinfo->si_type = PERLSI_MAIN;	576	PL_curstackinfo->si_type = PERLSI_MAIN;
451	PL_curstack = PL_curstackinfo->si_stack;	577	PL_curstack = PL_curstackinfo->si_stack;
452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	578	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453		579
454	PL_stack_base = AvARRAY(PL_curstack);	580	PL_stack_base = AvARRAY(PL_curstack);
455	PL_stack_sp = PL_stack_base;	581	PL_stack_sp = PL_stack_base;
456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	582	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457		583
458	New(50,PL_tmps_stack,128,SV*);	584	New(50,PL_tmps_stack,32,SV*);
459	PL_tmps_floor = -1;	585	PL_tmps_floor = -1;
460	PL_tmps_ix = -1;	586	PL_tmps_ix = -1;
461	PL_tmps_max = 128;	587	PL_tmps_max = 32;
462		588
463	New(54,PL_markstack,32,I32);	589	New(54,PL_markstack,16,I32);
464	PL_markstack_ptr = PL_markstack;	590	PL_markstack_ptr = PL_markstack;
465	PL_markstack_max = PL_markstack + 32;	591	PL_markstack_max = PL_markstack + 16;
466		592
467	#ifdef SET_MARK_OFFSET	593	#ifdef SET_MARK_OFFSET
468	SET_MARK_OFFSET;	594	SET_MARK_OFFSET;
469	#endif	595	#endif
470		596
471	New(54,PL_scopestack,32,I32);	597	New(54,PL_scopestack,8,I32);
472	PL_scopestack_ix = 0;	598	PL_scopestack_ix = 0;
473	PL_scopestack_max = 32;	599	PL_scopestack_max = 8;
474		600
475	New(54,PL_savestack,64,ANY);	601	New(54,PL_savestack,24,ANY);
476	PL_savestack_ix = 0;	602	PL_savestack_ix = 0;
477	PL_savestack_max = 64;	603	PL_savestack_max = 24;
478		604
479	#if !PERL_VERSION_ATLEAST (5,9,0)	605	#if !PERL_VERSION_ATLEAST (5,10,0)
480	New(54,PL_retstack,16,OP*);	606	New(54,PL_retstack,4,OP*);
481	PL_retstack_ix = 0;	607	PL_retstack_ix = 0;
482	PL_retstack_max = 16;	608	PL_retstack_max = 4;
483	#endif	609	#endif
484	}	610	}
485	#endif	611	#endif
486		612
487	/*	613	/*
488	* destroy the stacks, the callchain etc...	614	* destroy the stacks, the callchain etc...
489	*/	615	*/
490	static void	616	static void
491	coro_destroy_stacks (pTHX)	617	coro_destroy_stacks (pTHX)
492	{	618	{
493	if (!IN_DESTRUCT)
494	{
495	/* restore all saved variables and stuff */
496	LEAVE_SCOPE (0);
497	assert (PL_tmps_floor == -1);
498
499	/* free all temporaries */
500	FREETMPS;
501	assert (PL_tmps_ix == -1);
502
503	/* unwind all extra stacks */
504	POPSTACK_TO (PL_mainstack);
505
506	/* unwind main stack */
507	dounwind (-1);
508	}
509
510	while (PL_curstackinfo->si_next)	619	while (PL_curstackinfo->si_next)
511	PL_curstackinfo = PL_curstackinfo->si_next;	620	PL_curstackinfo = PL_curstackinfo->si_next;
512		621
513	while (PL_curstackinfo)	622	while (PL_curstackinfo)
514	{	623	{
…		…
524		633
525	Safefree (PL_tmps_stack);	634	Safefree (PL_tmps_stack);
526	Safefree (PL_markstack);	635	Safefree (PL_markstack);
527	Safefree (PL_scopestack);	636	Safefree (PL_scopestack);
528	Safefree (PL_savestack);	637	Safefree (PL_savestack);
529	#if !PERL_VERSION_ATLEAST (5,9,0)	638	#if !PERL_VERSION_ATLEAST (5,10,0)
530	Safefree (PL_retstack);	639	Safefree (PL_retstack);
531	#endif	640	#endif
532	}	641	}
533		642
		643	static size_t
		644	coro_rss (pTHX_ struct coro *coro)
		645	{
		646	size_t rss = sizeof (*coro);
		647
		648	if (coro->mainstack)
		649	{
		650	perl_slots tmp_slot;
		651	perl_slots *slot;
		652
		653	if (coro->flags & CF_RUNNING)
		654	{
		655	slot = &tmp_slot;
		656
		657	#define VAR(name,type) slot->name = PL_ ## name;
		658	# include "state.h"
		659	#undef VAR
		660	}
		661	else
		662	slot = coro->slot;
		663
		664	rss += sizeof (slot->curstackinfo);
		665	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		666	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		667	rss += slot->tmps_max * sizeof (SV *);
		668	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		669	rss += slot->scopestack_max * sizeof (I32);
		670	rss += slot->savestack_max * sizeof (ANY);
		671
		672	#if !PERL_VERSION_ATLEAST (5,10,0)
		673	rss += slot->retstack_max * sizeof (OP *);
		674	#endif
		675	}
		676
		677	return rss;
		678	}
		679
534	/** coroutine stack handling ************************************************/	680	/** coroutine stack handling ************************************************/
535		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
536	static void	732	static void
537	setup_coro (pTHX_ struct coro *coro)	733	coro_setup (pTHX_ struct coro *coro)
538	{	734	{
539	/*	735	/*
540	* emulate part of the perl startup here.	736	* emulate part of the perl startup here.
541	*/	737	*/
542	coro_init_stacks (aTHX);	738	coro_init_stacks (aTHX);
543		739
		740	PL_runops = RUNOPS_DEFAULT;
544	PL_curcop = &PL_compiling;	741	PL_curcop = &PL_compiling;
545	PL_in_eval = EVAL_NULL;	742	PL_in_eval = EVAL_NULL;
546	PL_comppad = 0;	743	PL_comppad = 0;
547	PL_curpm = 0;	744	PL_curpm = 0;
		745	PL_curpad = 0;
548	PL_localizing = 0;	746	PL_localizing = 0;
549	PL_dirty = 0;	747	PL_dirty = 0;
550	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);
551		763
552	{	764	{
553	dSP;	765	dSP;
554	LOGOP myop;	766	LOGOP myop;
555		767
556	SvREFCNT_dec (GvAV (PL_defgv));
557	GvAV (PL_defgv) = coro->args; coro->args = 0;
558
559	Zero (&myop, 1, LOGOP);	768	Zero (&myop, 1, LOGOP);
560	myop.op_next = Nullop;	769	myop.op_next = Nullop;
561	myop.op_flags = OPf_WANT_VOID;	770	myop.op_flags = OPf_WANT_VOID;
562		771
563	PUSHMARK (SP);	772	PUSHMARK (SP);
564	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	773	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
565	PUTBACK;	774	PUTBACK;
566	PL_op = (OP *)&myop;	775	PL_op = (OP *)&myop;
567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	776	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
568	SPAGAIN;	777	SPAGAIN;
569	}	778	}
570		779
571	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);
572	}	822	}
573		823
574	static void	824	static void
575	free_coro_mortal (pTHX)	825	free_coro_mortal (pTHX)
576	{	826	{
577	if (coro_mortal)	827	if (expect_true (coro_mortal))
578	{	828	{
579	SvREFCNT_dec (coro_mortal);	829	SvREFCNT_dec (coro_mortal);
580	coro_mortal = 0;	830	coro_mortal = 0;
581	}	831	}
582	}	832	}
583		833
		834	static int
		835	runops_trace (pTHX)
		836	{
		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;
		841
		842	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		843	{
		844	PERL_ASYNC_CHECK ();
		845
		846	if (cctx->flags & CC_TRACE_ALL)
		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	{
		889	oldcop = PL_curcop;
		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	}
		951	}
		952	}
		953
		954	TAINT_NOT;
		955	return 0;
		956	}
		957
584	/* 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 */
		959	/* _cctx_init should be careful, as it could be called at almost any time */
		960	/* during execution of a perl program */
585	static void NOINLINE	961	static void NOINLINE
586	prepare_cctx (pTHX_ coro_cctx *cctx)	962	cctx_prepare (pTHX_ coro_cctx *cctx)
587	{	963	{
588	dSP;	964	dSP;
589	LOGOP myop;	965	LOGOP myop;
		966
		967	PL_top_env = &PL_start_env;
		968
		969	if (cctx->flags & CC_TRACE)
		970	PL_runops = runops_trace;
590		971
591	Zero (&myop, 1, LOGOP);	972	Zero (&myop, 1, LOGOP);
592	myop.op_next = PL_op;	973	myop.op_next = PL_op;
593	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	974	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
594		975
…		…
600	PL_op = (OP *)&myop;	981	PL_op = (OP *)&myop;
601	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	982	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
602	SPAGAIN;	983	SPAGAIN;
603	}	984	}
604		985
		986	/*
		987	* this is a _very_ stripped down perl interpreter ;)
		988	*/
605	static void	989	static void
606	coro_run (void *arg)	990	cctx_run (void *arg)
607	{	991	{
608	dTHX;	992	dTHX;
609		993
610	/* coro_run is the alternative tail of transfer(), so unlock here. */	994	/* cctx_run is the alternative tail of transfer(), so unlock here. */
611	UNLOCK;	995	UNLOCK;
612		996
613	/*	997	/* we now skip the entersub that lead to transfer() */
614	* this is a _very_ stripped down perl interpreter ;)	998	PL_op = PL_op->op_next;
615	*/
616	PL_top_env = &PL_start_env;
617		999
618	/* inject call to cctx_init */	1000	/* inject a fake subroutine call to cctx_init */
619	prepare_cctx (aTHX_ (coro_cctx *)arg);	1001	cctx_prepare (aTHX_ (coro_cctx *)arg);
620		1002
621	/* somebody will hit me for both perl_run and PL_restartop */	1003	/* somebody or something will hit me for both perl_run and PL_restartop */
622	PL_restartop = PL_op;	1004	PL_restartop = PL_op;
623	perl_run (PL_curinterp);	1005	perl_run (PL_curinterp);
624		1006
625	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	1007	/*
626	abort ();	1008	* If perl-run returns we assume exit() was being called or the coro
		1009	* fell off the end, which seems to be the only valid (non-bug)
		1010	* reason for perl_run to return. We try to exit by jumping to the
		1011	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1012	* coroutine as Coro has no such concept
		1013	*/
		1014	PL_top_env = main_top_env;
		1015	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
627	}	1016	}
628		1017
629	static coro_cctx *	1018	static coro_cctx *
630	cctx_new ()	1019	cctx_new ()
631	{	1020	{
…		…
636	++cctx_count;	1025	++cctx_count;
637		1026
638	Newz (0, cctx, 1, coro_cctx);	1027	Newz (0, cctx, 1, coro_cctx);
639		1028
640	#if HAVE_MMAP	1029	#if HAVE_MMAP
641
642	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;
643	/* mmap supposedly does allocate-on-write for us */	1031	/* mmap supposedly does allocate-on-write for us */
644	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);
645		1033
646	if (cctx->sptr != (void *)-1)	1034	if (cctx->sptr != (void *)-1)
…		…
648	# if CORO_STACKGUARD	1036	# if CORO_STACKGUARD
649	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1037	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
650	# endif	1038	# endif
651	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1039	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
652	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1040	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
653	cctx->mapped = 1;	1041	cctx->flags |= CC_MAPPED;
654	}	1042	}
655	else	1043	else
656	#endif	1044	#endif
657	{	1045	{
658	cctx->ssize = coro_stacksize * (long)sizeof (long);	1046	cctx->ssize = coro_stacksize * (long)sizeof (long);
…		…
667	stack_start = cctx->sptr;	1055	stack_start = cctx->sptr;
668	stack_size = cctx->ssize;	1056	stack_size = cctx->ssize;
669	}	1057	}
670		1058
671	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);	1059	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
672	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);
673		1061
674	return cctx;	1062	return cctx;
675	}	1063	}
676		1064
677	static void	1065	static void
…		…
685	#if CORO_USE_VALGRIND	1073	#if CORO_USE_VALGRIND
686	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1074	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
687	#endif	1075	#endif
688		1076
689	#if HAVE_MMAP	1077	#if HAVE_MMAP
690	if (cctx->mapped)	1078	if (cctx->flags & CC_MAPPED)
691	munmap (cctx->sptr, cctx->ssize);	1079	munmap (cctx->sptr, cctx->ssize);
692	else	1080	else
693	#endif	1081	#endif
694	Safefree (cctx->sptr);	1082	Safefree (cctx->sptr);
695		1083
696	Safefree (cctx);	1084	Safefree (cctx);
697	}	1085	}
698		1086
		1087	/* wether this cctx should be destructed */
		1088	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1089
699	static coro_cctx *	1090	static coro_cctx *
700	cctx_get (pTHX)	1091	cctx_get (pTHX)
701	{	1092	{
702	while (cctx_first)	1093	while (expect_true (cctx_first))
703	{	1094	{
704	coro_cctx *cctx = cctx_first;	1095	coro_cctx *cctx = cctx_first;
705	cctx_first = cctx->next;	1096	cctx_first = cctx->next;
706	--cctx_idle;	1097	--cctx_idle;
707		1098
708	if (cctx->ssize >= coro_stacksize)	1099	if (expect_true (!CCTX_EXPIRED (cctx)))
709	return cctx;	1100	return cctx;
710		1101
711	cctx_destroy (cctx);	1102	cctx_destroy (cctx);
712	}	1103	}
713		1104
714	PL_op = PL_op->op_next;
715	return cctx_new ();	1105	return cctx_new ();
716	}	1106	}
717		1107
718	static void	1108	static void
719	cctx_put (coro_cctx *cctx)	1109	cctx_put (coro_cctx *cctx)
720	{	1110	{
721	/* free another cctx if overlimit */	1111	/* free another cctx if overlimit */
722	if (cctx_idle >= MAX_IDLE_CCTX)	1112	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
723	{	1113	{
724	coro_cctx *first = cctx_first;	1114	coro_cctx *first = cctx_first;
725	cctx_first = first->next;	1115	cctx_first = first->next;
726	--cctx_idle;	1116	--cctx_idle;
727		1117
728	assert (!first->inuse);
729	cctx_destroy (first);	1118	cctx_destroy (first);
730	}	1119	}
731		1120
732	++cctx_idle;	1121	++cctx_idle;
733	cctx->next = cctx_first;	1122	cctx->next = cctx_first;
734	cctx_first = cctx;	1123	cctx_first = cctx;
735	}	1124	}
736		1125
737	/** coroutine switching *****************************************************/	1126	/** coroutine switching *****************************************************/
738		1127
739	/* 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 */
740	static void NOINLINE	1150	static void NOINLINE
741	transfer (pTHX_ struct coro *prev, struct coro *next)	1151	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
742	{	1152	{
743	dSTACKLEVEL;	1153	dSTACKLEVEL;
		1154	static volatile int has_throw;
744		1155
745	/* sometimes transfer is only called to set idle_sp */	1156	/* sometimes transfer is only called to set idle_sp */
746	if (!next)	1157	if (expect_false (!next))
747	{	1158	{
748	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1159	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
749	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 */
750	}	1161	}
751	else if (prev != next)	1162	else if (expect_true (prev != next))
752	{	1163	{
753	coro_cctx *prev__cctx;	1164	coro_cctx *prev__cctx;
754		1165
755	if (prev->flags & CF_NEW)	1166	if (expect_false (prev->flags & CF_NEW))
756	{	1167	{
757	/* create a new empty context */	1168	/* create a new empty context */
758	Newz (0, prev->cctx, 1, coro_cctx);	1169	Newz (0, prev->cctx, 1, coro_cctx);
759	prev->cctx->inuse = 1;
760	prev->flags &= ~CF_NEW;	1170	prev->flags &= ~CF_NEW;
761	prev->flags |= CF_RUNNING;	1171	prev->flags |= CF_RUNNING;
762	}	1172	}
763		1173
764	/*TODO: must not croak here */
765	if (!prev->flags & CF_RUNNING)
766	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
767
768	if (next->flags & CF_RUNNING)
769	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
770
771	if (next->flags & CF_DESTROYED)
772	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
773
774	prev->flags &= ~CF_RUNNING;	1174	prev->flags &= ~CF_RUNNING;
775	next->flags |= CF_RUNNING;	1175	next->flags |= CF_RUNNING;
776		1176
777	LOCK;	1177	LOCK;
778		1178
		1179	/* first get rid of the old state */
		1180	save_perl (aTHX_ prev);
		1181
779	if (next->flags & CF_NEW)	1182	if (expect_false (next->flags & CF_NEW))
780	{	1183	{
781	/* need to start coroutine */	1184	/* need to start coroutine */
782	next->flags &= ~CF_NEW;	1185	next->flags &= ~CF_NEW;
783	/* first get rid of the old state */
784	save_perl (aTHX_ prev);
785	/* setup coroutine call */	1186	/* setup coroutine call */
786	setup_coro (aTHX_ next);	1187	coro_setup (aTHX_ next);
787	/* need a new stack */
788	assert (!next->cctx);
789	}	1188	}
790	else	1189	else
791	{
792	/* coroutine already started */
793	save_perl (aTHX_ prev);
794	load_perl (aTHX_ next);	1190	load_perl (aTHX_ next);
795	}
796		1191
797	prev__cctx = prev->cctx;	1192	prev__cctx = prev->cctx;
798		1193
799	/* possibly "free" the cctx */	1194	/* possibly "free" the cctx */
		1195	if (expect_true (
800	if (prev__cctx->idle_sp == STACKLEVEL)	1196	prev__cctx->idle_sp == STACKLEVEL
		1197	&& !(prev__cctx->flags & CC_TRACE)
		1198	&& !force_cctx
		1199	))
801	{	1200	{
802	/* 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 */
803	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));
804		1203
805	prev->cctx = 0;	1204	prev->cctx = 0;
806		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
807	cctx_put (prev__cctx);	1212	cctx_put (prev__cctx);
808	prev__cctx->inuse = 0;
809	}	1213	}
810		1214
		1215	++next->usecount;
		1216
811	if (!next->cctx)	1217	if (expect_true (!next->cctx))
812	{
813	next->cctx = cctx_get (aTHX);	1218	next->cctx = cctx_get (aTHX);
814	assert (!next->cctx->inuse);
815	next->cctx->inuse = 1;
816	}
817		1219
		1220	has_throw = !!next->throw;
		1221
818	if (prev__cctx != next->cctx)	1222	if (expect_false (prev__cctx != next->cctx))
819	{	1223	{
820	prev__cctx->top_env = PL_top_env;	1224	prev__cctx->top_env = PL_top_env;
821	PL_top_env = next->cctx->top_env;	1225	PL_top_env = next->cctx->top_env;
822	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1226	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
823	}	1227	}
824		1228
825	free_coro_mortal (aTHX);	1229	free_coro_mortal (aTHX);
826	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	}
827	}	1244	}
828	}	1245	}
829		1246
830	struct transfer_args	1247	struct transfer_args
831	{	1248	{
832	struct coro *prev, *next;	1249	struct coro *prev, *next;
833	};	1250	};
834		1251
		1252	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
835	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)	1253	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
836		1254
837	/** high level stuff ********************************************************/	1255	/** high level stuff ********************************************************/
838		1256
839	static int	1257	static int
840	coro_state_destroy (pTHX_ struct coro *coro)	1258	coro_state_destroy (pTHX_ struct coro *coro)
…		…
857		1275
858	if (coro->mainstack && coro->mainstack != main_mainstack)	1276	if (coro->mainstack && coro->mainstack != main_mainstack)
859	{	1277	{
860	struct coro temp;	1278	struct coro temp;
861		1279
862	assert (!(coro->flags & CF_RUNNING));
863
864	Zero (&temp, 1, struct coro);
865	temp.save = CORO_SAVE_ALL;
866
867	if (coro->flags & CF_RUNNING)	1280	if (coro->flags & CF_RUNNING)
868	croak ("FATAL: tried to destroy currently running coroutine");	1281	croak ("FATAL: tried to destroy currently running coroutine");
869		1282
870	save_perl (aTHX_ &temp);	1283	save_perl (aTHX_ &temp);
871	load_perl (aTHX_ coro);	1284	load_perl (aTHX_ coro);
872		1285
873	coro_destroy_stacks (aTHX);	1286	coro_destroy (aTHX_ coro);
874		1287
875	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */	1288	load_perl (aTHX_ &temp);
876		1289
877	coro->mainstack = 0;	1290	coro->slot = 0;
878	}	1291	}
879		1292
880	cctx_destroy (coro->cctx);	1293	cctx_destroy (coro->cctx);
881	SvREFCNT_dec (coro->args);	1294	SvREFCNT_dec (coro->args);
882		1295
		1296	if (coro->next) coro->next->prev = coro->prev;
		1297	if (coro->prev) coro->prev->next = coro->next;
		1298	if (coro == coro_first) coro_first = coro->next;
		1299
883	return 1;	1300	return 1;
884	}	1301	}
885		1302
886	static int	1303	static int
887	coro_state_free (pTHX_ SV *sv, MAGIC *mg)	1304	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
888	{	1305	{
889	struct coro *coro = (struct coro *)mg->mg_ptr;	1306	struct coro *coro = (struct coro *)mg->mg_ptr;
890	mg->mg_ptr = 0;	1307	mg->mg_ptr = 0;
		1308
		1309	coro->hv = 0;
891		1310
892	if (--coro->refcnt < 0)	1311	if (--coro->refcnt < 0)
893	{	1312	{
894	coro_state_destroy (aTHX_ coro);	1313	coro_state_destroy (aTHX_ coro);
895	Safefree (coro);	1314	Safefree (coro);
…		…
917	#else	1336	#else
918	# define MGf_DUP 0	1337	# define MGf_DUP 0
919	#endif	1338	#endif
920	};	1339	};
921		1340
922	static struct coro *
923	SvSTATE_ (pTHX_ SV *coro)
924	{
925	HV *stash;
926	MAGIC *mg;
927
928	if (SvROK (coro))
929	coro = SvRV (coro);
930
931	stash = SvSTASH (coro);
932	if (stash != coro_stash && stash != coro_state_stash)
933	{
934	/* very slow, but rare, check */
935	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
936	croak ("Coro::State object required");
937	}
938
939	mg = CORO_MAGIC (coro);
940	return (struct coro *)mg->mg_ptr;
941	}
942
943	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
944
945	static void	1341	static void
946	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)
947	{	1343	{
948	ta->prev = SvSTATE (prev_sv);	1344	ta->prev = SvSTATE (prev_sv);
949	ta->next = SvSTATE (next_sv);	1345	ta->next = SvSTATE (next_sv);
		1346	TRANSFER_CHECK (*ta);
950	}	1347	}
951		1348
952	static void	1349	static void
953	api_transfer (SV *prev_sv, SV *next_sv)	1350	api_transfer (SV *prev_sv, SV *next_sv)
954	{	1351	{
955	dTHX;	1352	dTHX;
956	struct transfer_args ta;	1353	struct transfer_args ta;
957		1354
958	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1355	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
959	TRANSFER (ta);	1356	TRANSFER (ta, 1);
960	}
961
962	static int
963	api_save (SV *coro_sv, int new_save)
964	{
965	dTHX;
966	struct coro *coro = SvSTATE (coro_sv);
967	int old_save = coro->save;
968
969	if (new_save >= 0)
970	coro->save = new_save;
971
972	return old_save;
973	}	1357	}
974		1358
975	/** Coro ********************************************************************/	1359	/** Coro ********************************************************************/
976		1360
977	static void	1361	static void
…		…
979	{	1363	{
980	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);
981	}	1365	}
982		1366
983	static SV *	1367	static SV *
984	coro_deq (pTHX_ int min_prio)	1368	coro_deq (pTHX)
985	{	1369	{
986	int prio = PRIO_MAX - PRIO_MIN;	1370	int prio;
987		1371
988	min_prio -= PRIO_MIN;
989	if (min_prio < 0)
990	min_prio = 0;
991
992	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1372	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
993	if (AvFILLp (coro_ready [prio]) >= 0)	1373	if (AvFILLp (coro_ready [prio]) >= 0)
994	return av_shift (coro_ready [prio]);	1374	return av_shift (coro_ready [prio]);
995		1375
996	return 0;	1376	return 0;
997	}	1377	}
…		…
1033	SV *prev_sv, *next_sv;	1413	SV *prev_sv, *next_sv;
1034		1414
1035	for (;;)	1415	for (;;)
1036	{	1416	{
1037	LOCK;	1417	LOCK;
1038	next_sv = coro_deq (aTHX_ PRIO_MIN);	1418	next_sv = coro_deq (aTHX);
1039		1419
1040	/* nothing to schedule: call the idle handler */	1420	/* nothing to schedule: call the idle handler */
1041	if (!next_sv)	1421	if (expect_false (!next_sv))
1042	{	1422	{
1043	dSP;	1423	dSP;
1044	UNLOCK;	1424	UNLOCK;
1045		1425
1046	ENTER;	1426	ENTER;
1047	SAVETMPS;	1427	SAVETMPS;
1048		1428
1049	PUSHMARK (SP);	1429	PUSHMARK (SP);
1050	PUTBACK;	1430	PUTBACK;
1051	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1431	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1432	SPAGAIN;
1052		1433
1053	FREETMPS;	1434	FREETMPS;
1054	LEAVE;	1435	LEAVE;
1055	continue;	1436	continue;
1056	}	1437	}
1057		1438
1058	ta->next = SvSTATE (next_sv);	1439	ta->next = SvSTATE (next_sv);
1059		1440
1060	/* cannot transfer to destroyed coros, skip and look for next */	1441	/* cannot transfer to destroyed coros, skip and look for next */
1061	if (ta->next->flags & CF_DESTROYED)	1442	if (expect_false (ta->next->flags & CF_DESTROYED))
1062	{	1443	{
1063	UNLOCK;	1444	UNLOCK;
1064	SvREFCNT_dec (next_sv);	1445	SvREFCNT_dec (next_sv);
1065	/* coro_nready is already taken care of by destroy */	1446	/* coro_nready is already taken care of by destroy */
1066	continue;	1447	continue;
…		…
1071	break;	1452	break;
1072	}	1453	}
1073		1454
1074	/* free this only after the transfer */	1455	/* free this only after the transfer */
1075	prev_sv = SvRV (coro_current);	1456	prev_sv = SvRV (coro_current);
1076	SvRV_set (coro_current, next_sv);
1077	ta->prev = SvSTATE (prev_sv);	1457	ta->prev = SvSTATE (prev_sv);
1078		1458	TRANSFER_CHECK (*ta);
1079	assert (ta->next->flags & CF_READY);	1459	assert (ta->next->flags & CF_READY);
1080	ta->next->flags &= ~CF_READY;	1460	ta->next->flags &= ~CF_READY;
		1461	SvRV_set (coro_current, next_sv);
1081		1462
1082	LOCK;	1463	LOCK;
1083	free_coro_mortal (aTHX);	1464	free_coro_mortal (aTHX);
1084	coro_mortal = prev_sv;	1465	coro_mortal = prev_sv;
1085	UNLOCK;	1466	UNLOCK;
…		…
1111	{	1492	{
1112	dTHX;	1493	dTHX;
1113	struct transfer_args ta;	1494	struct transfer_args ta;
1114		1495
1115	prepare_schedule (aTHX_ &ta);	1496	prepare_schedule (aTHX_ &ta);
1116	TRANSFER (ta);	1497	TRANSFER (ta, 1);
1117	}	1498	}
1118		1499
1119	static int	1500	static int
1120	api_cede (void)	1501	api_cede (void)
1121	{	1502	{
1122	dTHX;	1503	dTHX;
1123	struct transfer_args ta;	1504	struct transfer_args ta;
1124		1505
1125	prepare_cede (aTHX_ &ta);	1506	prepare_cede (aTHX_ &ta);
1126		1507
1127	if (ta.prev != ta.next)	1508	if (expect_true (ta.prev != ta.next))
1128	{	1509	{
1129	TRANSFER (ta);	1510	TRANSFER (ta, 1);
1130	return 1;	1511	return 1;
1131	}	1512	}
1132	else	1513	else
1133	return 0;	1514	return 0;
1134	}	1515	}
…		…
1139	dTHX;	1520	dTHX;
1140	struct transfer_args ta;	1521	struct transfer_args ta;
1141		1522
1142	if (prepare_cede_notself (aTHX_ &ta))	1523	if (prepare_cede_notself (aTHX_ &ta))
1143	{	1524	{
1144	TRANSFER (ta);	1525	TRANSFER (ta, 1);
1145	return 1;	1526	return 1;
1146	}	1527	}
1147	else	1528	else
1148	return 0;	1529	return 0;
1149	}	1530	}
1150		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
1151	MODULE = Coro::State PACKAGE = Coro::State	1558	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1152		1559
1153	PROTOTYPES: DISABLE	1560	PROTOTYPES: DISABLE
1154		1561
1155	BOOT:	1562	BOOT:
1156	{	1563	{
1157	#ifdef USE_ITHREADS	1564	#ifdef USE_ITHREADS
1158	MUTEX_INIT (&coro_mutex);	1565	MUTEX_INIT (&coro_mutex);
1159	#endif	1566	#endif
1160	BOOT_PAGESIZE;	1567	BOOT_PAGESIZE;
1161		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
1162	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1581	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1163		1582
		1583	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1584	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1164	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1585	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1165	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1166	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1167	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1168	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1586	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1169		1587
1170	main_mainstack = PL_mainstack;	1588	main_mainstack = PL_mainstack;
		1589	main_top_env = PL_top_env;
		1590
		1591	while (main_top_env->je_prev)
		1592	main_top_env = main_top_env->je_prev;
1171		1593
1172	coroapi.ver = CORO_API_VERSION;	1594	coroapi.ver = CORO_API_VERSION;
		1595	coroapi.rev = CORO_API_REVISION;
1173	coroapi.transfer = api_transfer;	1596	coroapi.transfer = api_transfer;
1174		1597
1175	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1598	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1176	}	1599	}
1177		1600
1178	SV *	1601	SV *
1179	new (char *klass, ...)	1602	new (char *klass, ...)
1180	CODE:	1603	CODE:
1181	{	1604	{
1182	struct coro *coro;	1605	struct coro *coro;
		1606	MAGIC *mg;
1183	HV *hv;	1607	HV *hv;
1184	int i;	1608	int i;
1185		1609
1186	Newz (0, coro, 1, struct coro);	1610	Newz (0, coro, 1, struct coro);
1187	coro->args = newAV ();	1611	coro->args = newAV ();
1188	coro->save = CORO_SAVE_ALL;
1189	coro->flags = CF_NEW;	1612	coro->flags = CF_NEW;
1190		1613
		1614	if (coro_first) coro_first->prev = coro;
		1615	coro->next = coro_first;
		1616	coro_first = coro;
		1617
1191	hv = newHV ();	1618	coro->hv = hv = newHV ();
1192	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;
1193	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1621	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1194		1622
		1623	av_extend (coro->args, items - 1);
1195	for (i = 1; i < items; i++)	1624	for (i = 1; i < items; i++)
1196	av_push (coro->args, newSVsv (ST (i)));	1625	av_push (coro->args, newSVsv (ST (i)));
1197	}	1626	}
1198	OUTPUT:	1627	OUTPUT:
1199	RETVAL	1628	RETVAL
1200		1629
1201	int	1630	# these not obviously related functions are all rolled into the same xs
1202	save (SV *coro, int new_save = -1)	1631	# function to increase chances that they all will call transfer with the same
1203	CODE:	1632	# stack offset
1204	RETVAL = api_save (coro, new_save);
1205	OUTPUT:
1206	RETVAL
1207
1208	void	1633	void
1209	_set_stacklevel (...)	1634	_set_stacklevel (...)
1210	ALIAS:	1635	ALIAS:
1211	Coro::State::transfer = 1	1636	Coro::State::transfer = 1
1212	Coro::schedule = 2	1637	Coro::schedule = 2
…		…
1214	Coro::cede_notself = 4	1639	Coro::cede_notself = 4
1215	CODE:	1640	CODE:
1216	{	1641	{
1217	struct transfer_args ta;	1642	struct transfer_args ta;
1218		1643
		1644	PUTBACK;
1219	switch (ix)	1645	switch (ix)
1220	{	1646	{
1221	case 0:	1647	case 0:
1222	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1648	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1223	ta.next = 0;	1649	ta.next = 0;
…		…
1242	if (!prepare_cede_notself (aTHX_ &ta))	1668	if (!prepare_cede_notself (aTHX_ &ta))
1243	XSRETURN_EMPTY;	1669	XSRETURN_EMPTY;
1244		1670
1245	break;	1671	break;
1246	}	1672	}
		1673	SPAGAIN;
1247		1674
1248	BARRIER;	1675	BARRIER;
		1676	PUTBACK;
1249	TRANSFER (ta);	1677	TRANSFER (ta, 0);
1250		1678	SPAGAIN; /* might be the sp of a different coroutine now */
1251	if (GIMME_V != G_VOID && ta.next != ta.prev)	1679	/* be extra careful not to ever do anything after TRANSFER */
1252	XSRETURN_YES;
1253	}	1680	}
1254		1681
1255	bool	1682	bool
1256	_destroy (SV *coro_sv)	1683	_destroy (SV *coro_sv)
1257	CODE:	1684	CODE:
…		…
1287	CODE:	1714	CODE:
1288	RETVAL = cctx_idle;	1715	RETVAL = cctx_idle;
1289	OUTPUT:	1716	OUTPUT:
1290	RETVAL	1717	RETVAL
1291		1718
		1719	void
		1720	list ()
		1721	PPCODE:
		1722	{
		1723	struct coro *coro;
		1724	for (coro = coro_first; coro; coro = coro->next)
		1725	if (coro->hv)
		1726	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1727	}
		1728
		1729	void
		1730	call (Coro::State coro, SV *coderef)
		1731	ALIAS:
		1732	eval = 1
		1733	CODE:
		1734	{
		1735	if (coro->mainstack)
		1736	{
		1737	struct coro temp;
		1738
		1739	if (!(coro->flags & CF_RUNNING))
		1740	{
		1741	PUTBACK;
		1742	save_perl (aTHX_ &temp);
		1743	load_perl (aTHX_ coro);
		1744	}
		1745
		1746	{
		1747	dSP;
		1748	ENTER;
		1749	SAVETMPS;
		1750	PUTBACK;
		1751	PUSHSTACK;
		1752	PUSHMARK (SP);
		1753
		1754	if (ix)
		1755	eval_sv (coderef, 0);
		1756	else
		1757	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1758
		1759	POPSTACK;
		1760	SPAGAIN;
		1761	FREETMPS;
		1762	LEAVE;
		1763	PUTBACK;
		1764	}
		1765
		1766	if (!(coro->flags & CF_RUNNING))
		1767	{
		1768	save_perl (aTHX_ coro);
		1769	load_perl (aTHX_ &temp);
		1770	SPAGAIN;
		1771	}
		1772	}
		1773	}
		1774
		1775	SV *
		1776	is_ready (Coro::State coro)
		1777	PROTOTYPE: $
		1778	ALIAS:
		1779	is_ready = CF_READY
		1780	is_running = CF_RUNNING
		1781	is_new = CF_NEW
		1782	is_destroyed = CF_DESTROYED
		1783	CODE:
		1784	RETVAL = boolSV (coro->flags & ix);
		1785	OUTPUT:
		1786	RETVAL
		1787
		1788	void
		1789	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1790
		1791	SV *
		1792	has_stack (Coro::State coro)
		1793	PROTOTYPE: $
		1794	CODE:
		1795	RETVAL = boolSV (!!coro->cctx);
		1796	OUTPUT:
		1797	RETVAL
		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
		1807	IV
		1808	rss (Coro::State coro)
		1809	PROTOTYPE: $
		1810	ALIAS:
		1811	usecount = 1
		1812	CODE:
		1813	switch (ix)
		1814	{
		1815	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1816	case 1: RETVAL = coro->usecount; break;
		1817	}
		1818	OUTPUT:
		1819	RETVAL
		1820
		1821	void
		1822	force_cctx ()
		1823	CODE:
		1824	struct coro *coro = SvSTATE (coro_current);
		1825	coro->cctx->idle_sp = 0;
		1826
1292	MODULE = Coro::State PACKAGE = Coro	1827	MODULE = Coro::State PACKAGE = Coro
1293		1828
1294	BOOT:	1829	BOOT:
1295	{	1830	{
1296	int i;	1831	int i;
1297		1832
		1833	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1834	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1835	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1836
		1837	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1838	SvREADONLY_on (coro_current);
		1839
1298	coro_stash = gv_stashpv ("Coro", TRUE);	1840	coro_stash = gv_stashpv ("Coro", TRUE);
1299		1841
1300	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1842	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1301	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1843	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1302	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1844	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1303	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1845	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1304	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1846	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1305	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1847	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1306		1848
1307	coro_current = get_sv ("Coro::current", FALSE);
1308	SvREADONLY_on (coro_current);
1309
1310	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1849	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1311	coro_ready[i] = newAV ();	1850	coro_ready[i] = newAV ();
1312		1851
1313	{	1852	{
1314	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 */
1315		1855
1316	coroapi.schedule = api_schedule;	1856	coroapi.schedule = api_schedule;
1317	coroapi.save = api_save;
1318	coroapi.cede = api_cede;	1857	coroapi.cede = api_cede;
1319	coroapi.cede_notself = api_cede_notself;	1858	coroapi.cede_notself = api_cede_notself;
1320	coroapi.ready = api_ready;	1859	coroapi.ready = api_ready;
1321	coroapi.is_ready = api_is_ready;	1860	coroapi.is_ready = api_is_ready;
1322	coroapi.nready = &coro_nready;	1861	coroapi.nready = &coro_nready;
…		…
1363	CODE:	1902	CODE:
1364	RETVAL = boolSV (api_ready (self));	1903	RETVAL = boolSV (api_ready (self));
1365	OUTPUT:	1904	OUTPUT:
1366	RETVAL	1905	RETVAL
1367		1906
1368	SV *
1369	is_ready (SV *self)
1370	PROTOTYPE: $
1371	CODE:
1372	RETVAL = boolSV (api_is_ready (self));
1373	OUTPUT:
1374	RETVAL
1375
1376	int	1907	int
1377	nready (...)	1908	nready (...)
1378	PROTOTYPE:	1909	PROTOTYPE:
1379	CODE:	1910	CODE:
1380	RETVAL = coro_nready;	1911	RETVAL = coro_nready;
1381	OUTPUT:	1912	OUTPUT:
1382	RETVAL	1913	RETVAL
1383		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
		1938	# for async_pool speedup
		1939	void
		1940	_pool_1 (SV *cb)
		1941	CODE:
		1942	{
		1943	struct coro *coro = SvSTATE (coro_current);
		1944	HV *hv = (HV *)SvRV (coro_current);
		1945	AV *defav = GvAV (PL_defgv);
		1946	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1947	AV *invoke_av;
		1948	int i, len;
		1949
		1950	if (!invoke)
		1951	{
		1952	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1953	croak ("\3async_pool terminate\2\n");
		1954	}
		1955
		1956	SvREFCNT_dec (coro->saved_deffh);
		1957	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1958
		1959	hv_store (hv, "desc", sizeof ("desc") - 1,
		1960	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1961
		1962	invoke_av = (AV *)SvRV (invoke);
		1963	len = av_len (invoke_av);
		1964
		1965	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1966
		1967	if (len > 0)
		1968	{
		1969	av_fill (defav, len - 1);
		1970	for (i = 0; i < len; ++i)
		1971	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1972	}
		1973
		1974	SvREFCNT_dec (invoke);
		1975	}
		1976
		1977	void
		1978	_pool_2 (SV *cb)
		1979	CODE:
		1980	{
		1981	struct coro *coro = SvSTATE (coro_current);
		1982
		1983	sv_setsv (cb, &PL_sv_undef);
		1984
		1985	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1986	coro->saved_deffh = 0;
		1987
		1988	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1989	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1990	{
		1991	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1992	croak ("\3async_pool terminate\2\n");
		1993	}
		1994
		1995	av_clear (GvAV (PL_defgv));
		1996	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1997	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1998
		1999	coro->prio = 0;
		2000
		2001	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		2002	api_trace (coro_current, 0);
		2003
		2004	av_push (av_async_pool, newSVsv (coro_current));
		2005	}
		2006
		2007
1384	MODULE = Coro::State PACKAGE = Coro::AIO	2008	MODULE = Coro::State PACKAGE = Coro::AIO
1385		2009
1386	SV *	2010	SV *
1387	_get_state ()	2011	_get_state ()
1388	CODE:	2012	CODE:

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