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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.143 by root, Wed Feb 28 11:43:03 2007 UTC vs.
Revision 1.224 by root, Sun Mar 2 16:10:22 2008 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
2		5
3	#include "EXTERN.h"	6	#include "EXTERN.h"
4	#include "perl.h"	7	#include "perl.h"
5	#include "XSUB.h"	8	#include "XSUB.h"
6		9
7	#include "patchlevel.h"	10	#include "patchlevel.h"
8		11
9	#include <stdio.h>	12	#include <stdio.h>
10	#include <errno.h>	13	#include <errno.h>
11	#include <assert.h>	14	#include <assert.h>
		15	#include <inttypes.h> /* portable stdint.h */
12		16
13	#ifdef HAVE_MMAP	17	#ifdef HAVE_MMAP
14	# include <unistd.h>	18	# include <unistd.h>
15	# include <sys/mman.h>	19	# include <sys/mman.h>
16	# ifndef MAP_ANONYMOUS	20	# ifndef MAP_ANONYMOUS
…		…
68	# ifndef IS_PADCONST	72	# ifndef IS_PADCONST
69	# define IS_PADCONST(v) 0	73	# define IS_PADCONST(v) 0
70	# endif	74	# endif
71	#endif	75	#endif
72		76
		77	/* 5.8.8 */
		78	#ifndef GV_NOTQUAL
		79	# define GV_NOTQUAL 0
		80	#endif
		81	#ifndef newSV
		82	# define newSV(l) NEWSV(0,l)
		83	#endif
		84
		85	/* 5.11 */
		86	#ifndef CxHASARGS
		87	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		88	#endif
		89
73	/* 5.8.7 */	90	/* 5.8.7 */
74	#ifndef SvRV_set	91	#ifndef SvRV_set
75	# define SvRV_set(s,v) SvRV(s) = (v)	92	# define SvRV_set(s,v) SvRV(s) = (v)
76	#endif	93	#endif
77		94
…		…
86	/* prefer perl internal functions over our own? */	103	/* prefer perl internal functions over our own? */
87	#ifndef CORO_PREFER_PERL_FUNCTIONS	104	#ifndef CORO_PREFER_PERL_FUNCTIONS
88	# define CORO_PREFER_PERL_FUNCTIONS 0	105	# define CORO_PREFER_PERL_FUNCTIONS 0
89	#endif	106	#endif
90		107
91	/* The next macro should declare a variable stacklevel that contains and approximation	108	/* The next macros try to return the current stack pointer, in an as
92	* to the current C stack pointer. Its property is that it changes with each call	109	* portable way as possible. */
93	* and should be unique. */
94	#define dSTACKLEVEL int stacklevel	110	#define dSTACKLEVEL volatile char stacklevel
95	#define STACKLEVEL ((void *)&stacklevel)	111	#define STACKLEVEL ((void *)&stacklevel)
96		112
97	#define IN_DESTRUCT (PL_main_cv == Nullcv)	113	#define IN_DESTRUCT (PL_main_cv == Nullcv)
98		114
99	#if __GNUC__ >= 3	115	#if __GNUC__ >= 3
100	# define attribute(x) __attribute__(x)	116	# define attribute(x) __attribute__(x)
101	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	117	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		118	# define expect(expr,value) __builtin_expect ((expr),(value))
102	#else	119	#else
103	# define attribute(x)	120	# define attribute(x)
104	# define BARRIER	121	# define BARRIER
		122	# define expect(expr,value) (expr)
105	#endif	123	#endif
		124
		125	#define expect_false(expr) expect ((expr) != 0, 0)
		126	#define expect_true(expr) expect ((expr) != 0, 1)
106		127
107	#define NOINLINE attribute ((noinline))	128	#define NOINLINE attribute ((noinline))
108		129
109	#include "CoroAPI.h"	130	#include "CoroAPI.h"
110		131
…		…
124	I32 laststype;	145	I32 laststype;
125	int laststatval;	146	int laststatval;
126	Stat_t statcache;	147	Stat_t statcache;
127	};	148	};
128		149
		150	static size_t coro_stacksize = CORO_STACKSIZE;
129	static struct CoroAPI coroapi;	151	static struct CoroAPI coroapi;
130	static AV *main_mainstack; /* used to differentiate between $main and others */	152	static AV *main_mainstack; /* used to differentiate between $main and others */
		153	static JMPENV *main_top_env;
131	static HV *coro_state_stash, *coro_stash;	154	static HV *coro_state_stash, *coro_stash;
132	static SV *coro_mortal; /* will be freed after next transfer */	155	static volatile SV *coro_mortal; /* will be freed after next transfer */
		156
		157	static GV *irsgv; /* $/ */
		158	static GV *stdoutgv; /* *STDOUT */
		159	static SV *rv_diehook;
		160	static SV *rv_warnhook;
		161	static HV *hv_sig; /* %SIG */
		162
		163	/* async_pool helper stuff */
		164	static SV *sv_pool_rss;
		165	static SV *sv_pool_size;
		166	static AV *av_async_pool;
133		167
134	static struct coro_cctx *cctx_first;	168	static struct coro_cctx *cctx_first;
135	static int cctx_count, cctx_idle;	169	static int cctx_count, cctx_idle;
		170
		171	enum {
		172	CC_MAPPED = 0x01,
		173	CC_NOREUSE = 0x02, /* throw this away after tracing */
		174	CC_TRACE = 0x04,
		175	CC_TRACE_SUB = 0x08, /* trace sub calls */
		176	CC_TRACE_LINE = 0x10, /* trace each statement */
		177	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		178	};
136		179
137	/* this is a structure representing a c-level coroutine */	180	/* this is a structure representing a c-level coroutine */
138	typedef struct coro_cctx {	181	typedef struct coro_cctx {
139	struct coro_cctx *next;	182	struct coro_cctx *next;
140		183
141	/* the stack */	184	/* the stack */
142	void *sptr;	185	void *sptr;
143	ssize_t ssize; /* positive == mmap, otherwise malloc */	186	size_t ssize;
144		187
145	/* cpu state */	188	/* cpu state */
146	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	189	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
147	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */	190	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
148	JMPENV *top_env;	191	JMPENV *top_env;
149	coro_context cctx;	192	coro_context cctx;
150		193
151	int inuse;
152
153	#if CORO_USE_VALGRIND	194	#if CORO_USE_VALGRIND
154	int valgrind_id;	195	int valgrind_id;
155	#endif	196	#endif
		197	unsigned char flags;
156	} coro_cctx;	198	} coro_cctx;
157		199
158	enum {	200	enum {
159	CF_RUNNING = 0x0001, /* coroutine is running */	201	CF_RUNNING = 0x0001, /* coroutine is running */
160	CF_READY = 0x0002, /* coroutine is ready */	202	CF_READY = 0x0002, /* coroutine is ready */
161	CF_NEW = 0x0004, /* has never been switched to */	203	CF_NEW = 0x0004, /* has never been switched to */
162	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	204	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
163	};	205	};
164		206
		207	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		208	typedef struct {
		209	SV *defsv;
		210	AV *defav;
		211	SV *errsv;
		212	SV *irsgv;
		213	#define VAR(name,type) type name;
		214	# include "state.h"
		215	#undef VAR
		216	} perl_slots;
		217
		218	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		219
165	/* this is a structure representing a perl-level coroutine */	220	/* this is a structure representing a perl-level coroutine */
166	struct coro {	221	struct coro {
167	/* the c coroutine allocated to this perl coroutine, if any */	222	/* the c coroutine allocated to this perl coroutine, if any */
168	coro_cctx *cctx;	223	coro_cctx *cctx;
169		224
		225	/* process data */
		226	AV *mainstack;
		227	perl_slots *slot; /* basically the saved sp */
		228
170	/* data associated with this coroutine (initial args) */	229	AV *args; /* data associated with this coroutine (initial args) */
171	AV *args;	230	int refcnt; /* coroutines are refcounted, yes */
172	int refcnt;
173	int save; /* CORO_SAVE flags */
174	int flags; /* CF_ flags */	231	int flags; /* CF_ flags */
		232	HV *hv; /* the perl hash associated with this coro, if any */
175		233
176	/* optionally saved, might be zero */	234	/* statistics */
177	AV *defav; /* @_ */	235	int usecount; /* number of transfers to this coro */
178	SV *defsv; /* $_ */
179	SV *errsv; /* $@ */
180	SV *irssv; /* $/ */
181	SV *irssv_sv; /* real $/ cache */
182
183	#define VAR(name,type) type name;
184	# include "state.h"
185	#undef VAR
186		236
187	/* coro process data */	237	/* coro process data */
188	int prio;	238	int prio;
		239	SV *throw; /* exception to be thrown */
		240
		241	/* async_pool */
		242	SV *saved_deffh;
		243
		244	/* linked list */
		245	struct coro *next, *prev;
189	};	246	};
190		247
191	typedef struct coro *Coro__State;	248	typedef struct coro *Coro__State;
192	typedef struct coro *Coro__State_or_hashref;	249	typedef struct coro *Coro__State_or_hashref;
193		250
…		…
202		259
203	/* for Coro.pm */	260	/* for Coro.pm */
204	static SV *coro_current;	261	static SV *coro_current;
205	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	262	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
206	static int coro_nready;	263	static int coro_nready;
		264	static struct coro *coro_first;
207		265
208	/** lowlevel stuff **********************************************************/	266	/** lowlevel stuff **********************************************************/
209		267
		268	static SV *
		269	coro_get_sv (pTHX_ const char *name, int create)
		270	{
		271	#if PERL_VERSION_ATLEAST (5,9,0)
		272	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		273	get_sv (name, create);
		274	#endif
		275	return get_sv (name, create);
		276	}
		277
210	static AV *	278	static AV *
		279	coro_get_av (pTHX_ const char *name, int create)
		280	{
		281	#if PERL_VERSION_ATLEAST (5,9,0)
		282	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		283	get_av (name, create);
		284	#endif
		285	return get_av (name, create);
		286	}
		287
		288	static HV *
		289	coro_get_hv (pTHX_ const char *name, int create)
		290	{
		291	#if PERL_VERSION_ATLEAST (5,9,0)
		292	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		293	get_hv (name, create);
		294	#endif
		295	return get_hv (name, create);
		296	}
		297
		298	static AV *
211	coro_clone_padlist (CV *cv)	299	coro_clone_padlist (pTHX_ CV *cv)
212	{	300	{
213	AV *padlist = CvPADLIST (cv);	301	AV *padlist = CvPADLIST (cv);
214	AV *newpadlist, *newpad;	302	AV *newpadlist, *newpad;
215		303
216	newpadlist = newAV ();	304	newpadlist = newAV ();
…		…
228		316
229	return newpadlist;	317	return newpadlist;
230	}	318	}
231		319
232	static void	320	static void
233	free_padlist (AV *padlist)	321	free_padlist (pTHX_ AV *padlist)
234	{	322	{
235	/* may be during global destruction */	323	/* may be during global destruction */
236	if (SvREFCNT (padlist))	324	if (SvREFCNT (padlist))
237	{	325	{
238	I32 i = AvFILLp (padlist);	326	I32 i = AvFILLp (padlist);
…		…
259	AV *padlist;	347	AV *padlist;
260	AV *av = (AV *)mg->mg_obj;	348	AV *av = (AV *)mg->mg_obj;
261		349
262	/* casting is fun. */	350	/* casting is fun. */
263	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	351	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264	free_padlist (padlist);	352	free_padlist (aTHX_ padlist);
265
266	SvREFCNT_dec (av);
267		353
268	return 0;	354	return 0;
269	}	355	}
270		356
271	#define PERL_MAGIC_coro PERL_MAGIC_ext	357	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		358	#define CORO_MAGIC_type_state PERL_MAGIC_ext
272		359
273	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	360	static MGVTBL coro_cv_vtbl = {
		361	0, 0, 0, 0,
		362	coro_cv_free
		363	};
274		364
275	#define CORO_MAGIC(cv) \	365	#define CORO_MAGIC(sv,type) \
276	SvMAGIC (cv) \	366	SvMAGIC (sv) \
277	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	367	? SvMAGIC (sv)->mg_type == type \
278	? SvMAGIC (cv) \	368	? SvMAGIC (sv) \
279	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	369	: mg_find (sv, type) \
280	: 0	370	: 0
		371
		372	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		373	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		374
		375	static struct coro *
		376	SvSTATE_ (pTHX_ SV *coro)
		377	{
		378	HV *stash;
		379	MAGIC *mg;
		380
		381	if (SvROK (coro))
		382	coro = SvRV (coro);
		383
		384	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		385	croak ("Coro::State object required");
		386
		387	stash = SvSTASH (coro);
		388	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		389	{
		390	/* very slow, but rare, check */
		391	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		392	croak ("Coro::State object required");
		393	}
		394
		395	mg = CORO_MAGIC_state (coro);
		396	return (struct coro *)mg->mg_ptr;
		397	}
		398
		399	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
281		400
282	/* the next two functions merely cache the padlists */	401	/* the next two functions merely cache the padlists */
283	static void	402	static void
284	get_padlist (CV *cv)	403	get_padlist (pTHX_ CV *cv)
285	{	404	{
286	MAGIC *mg = CORO_MAGIC (cv);	405	MAGIC *mg = CORO_MAGIC_cv (cv);
287	AV *av;	406	AV *av;
288		407
289	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	408	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
290	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	409	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
291	else	410	else
292	{	411	{
293	#if CORO_PREFER_PERL_FUNCTIONS	412	#if CORO_PREFER_PERL_FUNCTIONS
294	/* this is probably cleaner, but also slower? */	413	/* this is probably cleaner, but also slower? */
295	CV *cp = Perl_cv_clone (cv);	414	CV *cp = Perl_cv_clone (cv);
296	CvPADLIST (cv) = CvPADLIST (cp);	415	CvPADLIST (cv) = CvPADLIST (cp);
297	CvPADLIST (cp) = 0;	416	CvPADLIST (cp) = 0;
298	SvREFCNT_dec (cp);	417	SvREFCNT_dec (cp);
299	#else	418	#else
300	CvPADLIST (cv) = coro_clone_padlist (cv);	419	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
301	#endif	420	#endif
302	}	421	}
303	}	422	}
304		423
305	static void	424	static void
306	put_padlist (CV *cv)	425	put_padlist (pTHX_ CV *cv)
307	{	426	{
308	MAGIC *mg = CORO_MAGIC (cv);	427	MAGIC *mg = CORO_MAGIC_cv (cv);
309	AV *av;	428	AV *av;
310		429
311	if (!mg)	430	if (expect_false (!mg))
312	{	431	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
313	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
314	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
315	mg->mg_virtual = &vtbl_coro;
316	mg->mg_obj = (SV *)newAV ();
317	}
318		432
319	av = (AV *)mg->mg_obj;	433	av = (AV *)mg->mg_obj;
320		434
321	if (AvFILLp (av) >= AvMAX (av))	435	if (expect_false (AvFILLp (av) >= AvMAX (av)))
322	av_extend (av, AvMAX (av) + 1);	436	av_extend (av, AvMAX (av) + 1);
323		437
324	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	438	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
325	}	439	}
326		440
327	/** load & save, init *******************************************************/	441	/** load & save, init *******************************************************/
328		442
329	#define SB do {
330	#define SE } while (0)
331
332	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
333
334	static void	443	static void
335	load_perl (Coro__State c)	444	load_perl (pTHX_ Coro__State c)
336	{	445	{
		446	perl_slots *slot = c->slot;
		447	c->slot = 0;
		448
		449	PL_mainstack = c->mainstack;
		450
		451	GvSV (PL_defgv) = slot->defsv;
		452	GvAV (PL_defgv) = slot->defav;
		453	GvSV (PL_errgv) = slot->errsv;
		454	GvSV (irsgv) = slot->irsgv;
		455
337	#define VAR(name,type) PL_ ## name = c->name;	456	#define VAR(name,type) PL_ ## name = slot->name;
338	# include "state.h"	457	# include "state.h"
339	#undef VAR	458	#undef VAR
340
341	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
342	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
343	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
344	if (c->irssv)
345	{
346	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
347	SvREFCNT_dec (c->irssv);
348	else
349	{
350	REPLACE_SV (PL_rs, c->irssv);
351	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
352	sv_setsv (c->irssv_sv, PL_rs);
353	}
354	}
355		459
356	{	460	{
357	dSP;	461	dSP;
		462
358	CV *cv;	463	CV *cv;
359		464
360	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
361	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
362	{	467	{
363	put_padlist (cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
364	CvDEPTH (cv) = PTR2IV (POPs);	469	CvDEPTH (cv) = PTR2IV (POPs);
365	CvPADLIST (cv) = (AV *)POPs;	470	CvPADLIST (cv) = (AV *)POPs;
366	}	471	}
367		472
368	PUTBACK;	473	PUTBACK;
369	}	474	}
370	assert (!PL_comppad || AvARRAY (PL_comppad));//D
371	}	475	}
372		476
373	static void	477	static void
374	save_perl (Coro__State c)	478	save_perl (pTHX_ Coro__State c)
375	{	479	{
376	assert (!PL_comppad || AvARRAY (PL_comppad));//D
377	{	480	{
378	dSP;	481	dSP;
379	I32 cxix = cxstack_ix;	482	I32 cxix = cxstack_ix;
380	PERL_CONTEXT *ccstk = cxstack;	483	PERL_CONTEXT *ccstk = cxstack;
381	PERL_SI *top_si = PL_curstackinfo;	484	PERL_SI *top_si = PL_curstackinfo;
…		…
383	/*	486	/*
384	* the worst thing you can imagine happens first - we have to save	487	* the worst thing you can imagine happens first - we have to save
385	* (and reinitialize) all cv's in the whole callchain :(	488	* (and reinitialize) all cv's in the whole callchain :(
386	*/	489	*/
387		490
388	EXTEND (SP, 3 + 1);
389	PUSHs (Nullsv);	491	XPUSHs (Nullsv);
390	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
391	for (;;)	493	for (;;)
392	{	494	{
393	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
394	{	496	{
395	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
396		498
397	if (CxTYPE (cx) == CXt_SUB)	499	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
398	{	500	{
399	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
400		502
401	if (CvDEPTH (cv))	503	if (expect_true (CvDEPTH (cv)))
402	{	504	{
403	EXTEND (SP, 3);	505	EXTEND (SP, 3);
404	PUSHs ((SV *)CvPADLIST (cv));	506	PUSHs ((SV *)CvPADLIST (cv));
405	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
406	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
407		509
408	CvDEPTH (cv) = 0;	510	CvDEPTH (cv) = 0;
409	get_padlist (cv);	511	get_padlist (aTHX_ cv);
410	}	512	}
411	}	513	}
412	}	514	}
413		515
414	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
415	break;	517	break;
416		518
417	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
418	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
419	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
420	}	522	}
421		523
422	PUTBACK;	524	PUTBACK;
423	}	525	}
424		526
425	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
426	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
427	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	529	if (SLOT_COUNT >= 1) CXINC;
428	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	530	if (SLOT_COUNT >= 2) CXINC;
		531	if (SLOT_COUNT >= 3) CXINC;
		532	{
		533	int i;
		534	for (i = 3; i < SLOT_COUNT; ++i)
		535	CXINC;
		536	}
		537	cxstack_ix -= SLOT_COUNT; /* undo allocation */
429		538
		539	c->mainstack = PL_mainstack;
		540
		541	{
		542	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		543
		544	slot->defav = GvAV (PL_defgv);
		545	slot->defsv = DEFSV;
		546	slot->errsv = ERRSV;
		547	slot->irsgv = GvSV (irsgv);
		548
430	#define VAR(name,type)c->name = PL_ ## name;	549	#define VAR(name,type) slot->name = PL_ ## name;
431	# include "state.h"	550	# include "state.h"
432	#undef VAR	551	#undef VAR
		552	}
433	}	553	}
434		554
435	/*	555	/*
436	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
…		…
440	*/	560	*/
441	#if CORO_PREFER_PERL_FUNCTIONS	561	#if CORO_PREFER_PERL_FUNCTIONS
442	# define coro_init_stacks init_stacks	562	# define coro_init_stacks init_stacks
443	#else	563	#else
444	static void	564	static void
445	coro_init_stacks ()	565	coro_init_stacks (pTHX)
446	{	566	{
447	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	567	PL_curstackinfo = new_stackinfo(32, 8);
448	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		571
452	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		575
456	New(50,PL_tmps_stack,128,SV*);	576	New(50,PL_tmps_stack,32,SV*);
457	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
459	PL_tmps_max = 128;	579	PL_tmps_max = 32;
460		580
461	New(54,PL_markstack,32,I32);	581	New(54,PL_markstack,16,I32);
462	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 32;	583	PL_markstack_max = PL_markstack + 16;
464		584
465	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
466	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
467	#endif	587	#endif
468		588
469	New(54,PL_scopestack,32,I32);	589	New(54,PL_scopestack,8,I32);
470	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
471	PL_scopestack_max = 32;	591	PL_scopestack_max = 8;
472		592
473	New(54,PL_savestack,64,ANY);	593	New(54,PL_savestack,24,ANY);
474	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
475	PL_savestack_max = 64;	595	PL_savestack_max = 24;
476		596
477	#if !PERL_VERSION_ATLEAST (5,9,0)	597	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,16,OP*);	598	New(54,PL_retstack,4,OP*);
479	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
480	PL_retstack_max = 16;	600	PL_retstack_max = 4;
481	#endif	601	#endif
482	}	602	}
483	#endif	603	#endif
484		604
485	/*	605	/*
486	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
487	*/	607	*/
488	static void	608	static void
489	coro_destroy_stacks ()	609	coro_destroy_stacks (pTHX)
490	{	610	{
491	if (!IN_DESTRUCT)
492	{
493	/* restore all saved variables and stuff */
494	LEAVE_SCOPE (0);
495	assert (PL_tmps_floor == -1);
496
497	/* free all temporaries */
498	FREETMPS;
499	assert (PL_tmps_ix == -1);
500
501	/* unwind all extra stacks */
502	POPSTACK_TO (PL_mainstack);
503
504	/* unwind main stack */
505	dounwind (-1);
506	}
507
508	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
509	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
510		613
511	while (PL_curstackinfo)	614	while (PL_curstackinfo)
512	{	615	{
…		…
527	#if !PERL_VERSION_ATLEAST (5,9,0)	630	#if !PERL_VERSION_ATLEAST (5,9,0)
528	Safefree (PL_retstack);	631	Safefree (PL_retstack);
529	#endif	632	#endif
530	}	633	}
531		634
		635	static size_t
		636	coro_rss (pTHX_ struct coro *coro)
		637	{
		638	size_t rss = sizeof (*coro);
		639
		640	if (coro->mainstack)
		641	{
		642	perl_slots tmp_slot;
		643	perl_slots *slot;
		644
		645	if (coro->flags & CF_RUNNING)
		646	{
		647	slot = &tmp_slot;
		648
		649	#define VAR(name,type) slot->name = PL_ ## name;
		650	# include "state.h"
		651	#undef VAR
		652	}
		653	else
		654	slot = coro->slot;
		655
		656	rss += sizeof (slot->curstackinfo);
		657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		659	rss += slot->tmps_max * sizeof (SV *);
		660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		661	rss += slot->scopestack_max * sizeof (I32);
		662	rss += slot->savestack_max * sizeof (ANY);
		663
		664	#if !PERL_VERSION_ATLEAST (5,9,0)
		665	rss += slot->retstack_max * sizeof (OP *);
		666	#endif
		667	}
		668
		669	return rss;
		670	}
		671
532	/** coroutine stack handling ************************************************/	672	/** coroutine stack handling ************************************************/
533		673
		674	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		675	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		676
		677	/*
		678	* This overrides the default magic get method of %SIG elements.
		679	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		680	* and instead of tryign to save and restore the hash elements, we just provide
		681	* readback here.
		682	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		683	* not expecting this to actually change the hook. This is a potential problem
		684	* when a schedule happens then, but we ignore this.
		685	*/
		686	static int
		687	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		688	{
		689	const char *s = MgPV_nolen_const (mg);
		690
		691	if (*s == '_')
		692	{
		693	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		694	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		695	}
		696
		697	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		698	}
		699
		700	static int
		701	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		702	{
		703	const char *s = MgPV_nolen_const (mg);
		704
		705	if (*s == '_')
		706	{
		707	SV **svp = 0;
		708
		709	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		710	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		711
		712	if (svp)
		713	{
		714	SV *old = *svp;
		715	*svp = newSVsv (sv);
		716	SvREFCNT_dec (old);
		717	return;
		718	}
		719	}
		720
		721	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		722	}
		723
534	static void	724	static void
535	setup_coro (struct coro *coro)	725	coro_setup (pTHX_ struct coro *coro)
536	{	726	{
537	/*	727	/*
538	* emulate part of the perl startup here.	728	* emulate part of the perl startup here.
539	*/	729	*/
540
541	coro_init_stacks ();	730	coro_init_stacks (aTHX);
542		731
		732	PL_runops = RUNOPS_DEFAULT;
543	PL_curcop = &PL_compiling;	733	PL_curcop = &PL_compiling;
544	PL_in_eval = EVAL_NULL;	734	PL_in_eval = EVAL_NULL;
545	PL_comppad = 0;	735	PL_comppad = 0;
546	PL_curpm = 0;	736	PL_curpm = 0;
		737	PL_curpad = 0;
547	PL_localizing = 0;	738	PL_localizing = 0;
548	PL_dirty = 0;	739	PL_dirty = 0;
549	PL_restartop = 0;	740	PL_restartop = 0;
550		741
		742	/* recreate the die/warn hooks */
		743	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		744	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		745
		746	GvSV (PL_defgv) = newSV (0);
		747	GvAV (PL_defgv) = coro->args; coro->args = 0;
		748	GvSV (PL_errgv) = newSV (0);
		749	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		750	PL_rs = newSVsv (GvSV (irsgv));
		751	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		752
551	{	753	{
552	dSP;	754	dSP;
553	LOGOP myop;	755	LOGOP myop;
554		756
555	SvREFCNT_dec (GvAV (PL_defgv));
556	GvAV (PL_defgv) = coro->args; coro->args = 0;
557
558	Zero (&myop, 1, LOGOP);	757	Zero (&myop, 1, LOGOP);
559	myop.op_next = Nullop;	758	myop.op_next = Nullop;
560	myop.op_flags = OPf_WANT_VOID;	759	myop.op_flags = OPf_WANT_VOID;
561		760
562	PUSHMARK (SP);	761	PUSHMARK (SP);
563	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	762	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
564	PUTBACK;	763	PUTBACK;
565	PL_op = (OP *)&myop;	764	PL_op = (OP *)&myop;
566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	765	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
567	SPAGAIN;	766	SPAGAIN;
568	}	767	}
569		768
570	ENTER; /* necessary e.g. for dounwind */	769	/* this newly created coroutine might be run on an existing cctx which most
		770	* likely was suspended in set_stacklevel, called from entersub.
		771	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		772	* so we ENTER here for symmetry
		773	*/
		774	ENTER;
571	}	775	}
572		776
573	static void	777	static void
		778	coro_destroy (pTHX_ struct coro *coro)
		779	{
		780	if (!IN_DESTRUCT)
		781	{
		782	/* restore all saved variables and stuff */
		783	LEAVE_SCOPE (0);
		784	assert (PL_tmps_floor == -1);
		785
		786	/* free all temporaries */
		787	FREETMPS;
		788	assert (PL_tmps_ix == -1);
		789
		790	/* unwind all extra stacks */
		791	POPSTACK_TO (PL_mainstack);
		792
		793	/* unwind main stack */
		794	dounwind (-1);
		795	}
		796
		797	SvREFCNT_dec (GvSV (PL_defgv));
		798	SvREFCNT_dec (GvAV (PL_defgv));
		799	SvREFCNT_dec (GvSV (PL_errgv));
		800	SvREFCNT_dec (PL_defoutgv);
		801	SvREFCNT_dec (PL_rs);
		802	SvREFCNT_dec (GvSV (irsgv));
		803
		804	SvREFCNT_dec (PL_diehook);
		805	SvREFCNT_dec (PL_warnhook);
		806
		807	SvREFCNT_dec (coro->saved_deffh);
		808	SvREFCNT_dec (coro->throw);
		809
		810	coro_destroy_stacks (aTHX);
		811	}
		812
		813	static void
574	free_coro_mortal ()	814	free_coro_mortal (pTHX)
575	{	815	{
576	if (coro_mortal)	816	if (expect_true (coro_mortal))
577	{	817	{
578	SvREFCNT_dec (coro_mortal);	818	SvREFCNT_dec (coro_mortal);
579	coro_mortal = 0;	819	coro_mortal = 0;
580	}	820	}
581	}	821	}
582		822
		823	static int
		824	runops_trace (pTHX)
		825	{
		826	COP *oldcop = 0;
		827	int oldcxix = -2;
		828	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		829	coro_cctx *cctx = coro->cctx;
		830
		831	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		832	{
		833	PERL_ASYNC_CHECK ();
		834
		835	if (cctx->flags & CC_TRACE_ALL)
		836	{
		837	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		838	{
		839	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		840	SV **bot, **top;
		841	AV *av = newAV (); /* return values */
		842	SV **cb;
		843	dSP;
		844
		845	GV *gv = CvGV (cx->blk_sub.cv);
		846	SV *fullname = sv_2mortal (newSV (0));
		847	if (isGV (gv))
		848	gv_efullname3 (fullname, gv, 0);
		849
		850	bot = PL_stack_base + cx->blk_oldsp + 1;
		851	top = cx->blk_gimme == G_ARRAY ? SP + 1
		852	: cx->blk_gimme == G_SCALAR ? bot + 1
		853	: bot;
		854
		855	av_extend (av, top - bot);
		856	while (bot < top)
		857	av_push (av, SvREFCNT_inc (*bot++));
		858
		859	PL_runops = RUNOPS_DEFAULT;
		860	ENTER;
		861	SAVETMPS;
		862	EXTEND (SP, 3);
		863	PUSHMARK (SP);
		864	PUSHs (&PL_sv_no);
		865	PUSHs (fullname);
		866	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		867	PUTBACK;
		868	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		869	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		870	SPAGAIN;
		871	FREETMPS;
		872	LEAVE;
		873	PL_runops = runops_trace;
		874	}
		875
		876	if (oldcop != PL_curcop)
		877	{
		878	oldcop = PL_curcop;
		879
		880	if (PL_curcop != &PL_compiling)
		881	{
		882	SV **cb;
		883
		884	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		885	{
		886	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		887
		888	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		889	{
		890	runops_proc_t old_runops = PL_runops;
		891	dSP;
		892	GV *gv = CvGV (cx->blk_sub.cv);
		893	SV *fullname = sv_2mortal (newSV (0));
		894
		895	if (isGV (gv))
		896	gv_efullname3 (fullname, gv, 0);
		897
		898	PL_runops = RUNOPS_DEFAULT;
		899	ENTER;
		900	SAVETMPS;
		901	EXTEND (SP, 3);
		902	PUSHMARK (SP);
		903	PUSHs (&PL_sv_yes);
		904	PUSHs (fullname);
		905	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		906	PUTBACK;
		907	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		908	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		909	SPAGAIN;
		910	FREETMPS;
		911	LEAVE;
		912	PL_runops = runops_trace;
		913	}
		914
		915	oldcxix = cxstack_ix;
		916	}
		917
		918	if (cctx->flags & CC_TRACE_LINE)
		919	{
		920	dSP;
		921
		922	PL_runops = RUNOPS_DEFAULT;
		923	ENTER;
		924	SAVETMPS;
		925	EXTEND (SP, 3);
		926	PL_runops = RUNOPS_DEFAULT;
		927	PUSHMARK (SP);
		928	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		929	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		930	PUTBACK;
		931	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		932	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		933	SPAGAIN;
		934	FREETMPS;
		935	LEAVE;
		936	PL_runops = runops_trace;
		937	}
		938	}
		939	}
		940	}
		941	}
		942
		943	TAINT_NOT;
		944	return 0;
		945	}
		946
583	/* inject a fake call to Coro::State::_cctx_init into the execution */	947	/* inject a fake call to Coro::State::_cctx_init into the execution */
		948	/* _cctx_init should be careful, as it could be called at almost any time */
		949	/* during execution of a perl program */
584	static void NOINLINE	950	static void NOINLINE
585	prepare_cctx (coro_cctx *cctx)	951	cctx_prepare (pTHX_ coro_cctx *cctx)
586	{	952	{
587	dSP;	953	dSP;
588	LOGOP myop;	954	LOGOP myop;
		955
		956	PL_top_env = &PL_start_env;
		957
		958	if (cctx->flags & CC_TRACE)
		959	PL_runops = runops_trace;
589		960
590	Zero (&myop, 1, LOGOP);	961	Zero (&myop, 1, LOGOP);
591	myop.op_next = PL_op;	962	myop.op_next = PL_op;
592	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	963	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
593		964
…		…
599	PL_op = (OP *)&myop;	970	PL_op = (OP *)&myop;
600	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	971	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
601	SPAGAIN;	972	SPAGAIN;
602	}	973	}
603		974
		975	/*
		976	* this is a _very_ stripped down perl interpreter ;)
		977	*/
604	static void	978	static void
605	coro_run (void *arg)	979	cctx_run (void *arg)
606	{	980	{
		981	dTHX;
		982
607	/* coro_run is the alternative tail of transfer(), so unlock here. */	983	/* cctx_run is the alternative tail of transfer(), so unlock here. */
608	UNLOCK;	984	UNLOCK;
609		985
610	/*	986	/* we now skip the entersub that lead to transfer() */
611	* this is a _very_ stripped down perl interpreter ;)	987	PL_op = PL_op->op_next;
612	*/
613	PL_top_env = &PL_start_env;
614		988
615	/* inject call to cctx_init */	989	/* inject a fake subroutine call to cctx_init */
616	prepare_cctx ((coro_cctx *)arg);	990	cctx_prepare (aTHX_ (coro_cctx *)arg);
617		991
618	/* somebody will hit me for both perl_run and PL_restartop */	992	/* somebody or something will hit me for both perl_run and PL_restartop */
619	PL_restartop = PL_op;	993	PL_restartop = PL_op;
620	perl_run (PL_curinterp);	994	perl_run (PL_curinterp);
621		995
622	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	996	/*
623	abort ();	997	* If perl-run returns we assume exit() was being called or the coro
		998	* fell off the end, which seems to be the only valid (non-bug)
		999	* reason for perl_run to return. We try to exit by jumping to the
		1000	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1001	* coroutine as Coro has no such concept
		1002	*/
		1003	PL_top_env = main_top_env;
		1004	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
624	}	1005	}
625		1006
626	static coro_cctx *	1007	static coro_cctx *
627	cctx_new ()	1008	cctx_new ()
628	{	1009	{
629	coro_cctx *cctx;	1010	coro_cctx *cctx;
		1011	void *stack_start;
		1012	size_t stack_size;
630		1013
631	++cctx_count;	1014	++cctx_count;
632		1015
633	Newz (0, cctx, 1, coro_cctx);	1016	Newz (0, cctx, 1, coro_cctx);
634		1017
635	#if HAVE_MMAP	1018	#if HAVE_MMAP
636
637	cctx->ssize = ((CORO_STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1019	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
638	/* mmap supposedly does allocate-on-write for us */	1020	/* mmap supposedly does allocate-on-write for us */
639	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1021	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
640		1022
641	if (cctx->sptr != (void *)-1)	1023	if (cctx->sptr != (void *)-1)
642	{	1024	{
643	# if CORO_STACKGUARD	1025	# if CORO_STACKGUARD
644	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1026	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
645	# endif	1027	# endif
646	REGISTER_STACK (
647	cctx,
648	CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr,	1028	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
649	cctx->ssize + (char *)cctx->sptr	1029	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
650	);	1030	cctx->flags |= CC_MAPPED;
651
652	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
653	}	1031	}
654	else	1032	else
655	#endif	1033	#endif
656	{	1034	{
657	cctx->ssize = -CORO_STACKSIZE * (long)sizeof (long);	1035	cctx->ssize = coro_stacksize * (long)sizeof (long);
658	New (0, cctx->sptr, CORO_STACKSIZE, long);	1036	New (0, cctx->sptr, coro_stacksize, long);
659		1037
660	if (!cctx->sptr)	1038	if (!cctx->sptr)
661	{	1039	{
662	perror ("FATAL: unable to allocate stack for coroutine");	1040	perror ("FATAL: unable to allocate stack for coroutine");
663	_exit (EXIT_FAILURE);	1041	_exit (EXIT_FAILURE);
664	}	1042	}
665		1043
666	REGISTER_STACK (	1044	stack_start = cctx->sptr;
667	cctx,	1045	stack_size = cctx->ssize;
668	(char *)cctx->sptr,
669	(char *)cctx->sptr - cctx->ssize
670	);
671
672	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, -cctx->ssize);
673	}	1046	}
		1047
		1048	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		1049	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
674		1050
675	return cctx;	1051	return cctx;
676	}	1052	}
677		1053
678	static void	1054	static void
…		…
686	#if CORO_USE_VALGRIND	1062	#if CORO_USE_VALGRIND
687	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1063	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
688	#endif	1064	#endif
689		1065
690	#if HAVE_MMAP	1066	#if HAVE_MMAP
691	if (cctx->ssize > 0)	1067	if (cctx->flags & CC_MAPPED)
692	munmap (cctx->sptr, cctx->ssize);	1068	munmap (cctx->sptr, cctx->ssize);
693	else	1069	else
694	#endif	1070	#endif
695	Safefree (cctx->sptr);	1071	Safefree (cctx->sptr);
696		1072
697	Safefree (cctx);	1073	Safefree (cctx);
698	}	1074	}
699		1075
		1076	/* wether this cctx should be destructed */
		1077	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1078
700	static coro_cctx *	1079	static coro_cctx *
701	cctx_get ()	1080	cctx_get (pTHX)
702	{	1081	{
703	coro_cctx *cctx;	1082	while (expect_true (cctx_first))
704
705	if (cctx_first)
706	{	1083	{
707	cctx = cctx_first;	1084	coro_cctx *cctx = cctx_first;
708	cctx_first = cctx->next;	1085	cctx_first = cctx->next;
709	--cctx_idle;	1086	--cctx_idle;
710	}	1087
711	else	1088	if (expect_true (!CCTX_EXPIRED (cctx)))
712	{	1089	return cctx;
713	cctx = cctx_new ();	1090
714	PL_op = PL_op->op_next;	1091	cctx_destroy (cctx);
715	}	1092	}
716		1093
717	return cctx;	1094	return cctx_new ();
718	}	1095	}
719		1096
720	static void	1097	static void
721	cctx_put (coro_cctx *cctx)	1098	cctx_put (coro_cctx *cctx)
722	{	1099	{
723	/* free another cctx if overlimit */	1100	/* free another cctx if overlimit */
724	if (cctx_idle >= MAX_IDLE_CCTX)	1101	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
725	{	1102	{
726	coro_cctx *first = cctx_first;	1103	coro_cctx *first = cctx_first;
727	cctx_first = first->next;	1104	cctx_first = first->next;
728	--cctx_idle;	1105	--cctx_idle;
729		1106
730	assert (!first->inuse);
731	cctx_destroy (first);	1107	cctx_destroy (first);
732	}	1108	}
733		1109
734	++cctx_idle;	1110	++cctx_idle;
735	cctx->next = cctx_first;	1111	cctx->next = cctx_first;
736	cctx_first = cctx;	1112	cctx_first = cctx;
737	}	1113	}
738		1114
739	/** coroutine switching *****************************************************/	1115	/** coroutine switching *****************************************************/
740		1116
741	/* never call directly, always through the coro_state_transfer global variable */	1117	static void
		1118	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1119	{
		1120	if (expect_true (prev != next))
		1121	{
		1122	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1123	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1124
		1125	if (expect_false (next->flags & CF_RUNNING))
		1126	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1127
		1128	if (expect_false (next->flags & CF_DESTROYED))
		1129	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1130
		1131	if (
		1132	#if PERL_VERSION_ATLEAST (5,9,0)
		1133	expect_false (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
		1134	#else
		1135	expect_false (PL_lex_state != LEX_NOTPARSING)
		1136	#endif
		1137	)
		1138	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1139	}
		1140	}
		1141
		1142	/* always use the TRANSFER macro */
742	static void NOINLINE	1143	static void NOINLINE
743	transfer (struct coro *prev, struct coro *next)	1144	transfer (pTHX_ struct coro *prev, struct coro *next)
744	{	1145	{
745	dSTACKLEVEL;	1146	dSTACKLEVEL;
		1147	static volatile int has_throw;
746		1148
747	/* sometimes transfer is only called to set idle_sp */	1149	/* sometimes transfer is only called to set idle_sp */
748	if (!next)	1150	if (expect_false (!next))
749	{	1151	{
750	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1152	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
751	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1153	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
752	}	1154	}
753	else if (prev != next)	1155	else if (expect_true (prev != next))
754	{	1156	{
755	coro_cctx *prev__cctx;	1157	coro_cctx *prev__cctx;
756		1158
757	if (prev->flags & CF_NEW)	1159	if (expect_false (prev->flags & CF_NEW))
758	{	1160	{
759	/* create a new empty context */	1161	/* create a new empty context */
760	Newz (0, prev->cctx, 1, coro_cctx);	1162	Newz (0, prev->cctx, 1, coro_cctx);
761	prev->cctx->inuse = 1;
762	prev->flags &= ~CF_NEW;	1163	prev->flags &= ~CF_NEW;
763	prev->flags |= CF_RUNNING;	1164	prev->flags |= CF_RUNNING;
764	}	1165	}
765		1166
766	/*TODO: must not croak here */
767	if (!prev->flags & CF_RUNNING)
768	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
769
770	if (next->flags & CF_RUNNING)
771	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
772
773	if (next->flags & CF_DESTROYED)
774	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
775
776	prev->flags &= ~CF_RUNNING;	1167	prev->flags &= ~CF_RUNNING;
777	next->flags |= CF_RUNNING;	1168	next->flags |= CF_RUNNING;
778		1169
779	LOCK;	1170	LOCK;
780		1171
		1172	/* first get rid of the old state */
		1173	save_perl (aTHX_ prev);
		1174
781	if (next->flags & CF_NEW)	1175	if (expect_false (next->flags & CF_NEW))
782	{	1176	{
783	/* need to start coroutine */	1177	/* need to start coroutine */
784	next->flags &= ~CF_NEW;	1178	next->flags &= ~CF_NEW;
785	/* first get rid of the old state */
786	save_perl (prev);
787	/* setup coroutine call */	1179	/* setup coroutine call */
788	setup_coro (next);	1180	coro_setup (aTHX_ next);
789	/* need a new stack */
790	assert (!next->cctx);
791	}	1181	}
792	else	1182	else
793	{
794	/* coroutine already started */
795	save_perl (prev);
796	load_perl (next);	1183	load_perl (aTHX_ next);
797	}
798		1184
799	prev__cctx = prev->cctx;	1185	prev__cctx = prev->cctx;
800		1186
801	/* possibly "free" the cctx */	1187	/* possibly "free" the cctx */
802	if (prev__cctx->idle_sp == STACKLEVEL)	1188	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
803	{	1189	{
804	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1190	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
805	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1191	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
806		1192
807	prev->cctx = 0;	1193	prev->cctx = 0;
808		1194
		1195	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1196	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1197	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1198	if (!next->cctx)
		1199	next->cctx = cctx_get (aTHX);
		1200
809	cctx_put (prev__cctx);	1201	cctx_put (prev__cctx);
810	prev__cctx->inuse = 0;
811	}	1202	}
812		1203
		1204	++next->usecount;
		1205
813	if (!next->cctx)	1206	if (expect_true (!next->cctx))
814	{
815	next->cctx = cctx_get ();	1207	next->cctx = cctx_get (aTHX);
816	assert (!next->cctx->inuse);
817	next->cctx->inuse = 1;
818	}
819		1208
		1209	has_throw = !!next->throw;
		1210
820	if (prev__cctx != next->cctx)	1211	if (expect_false (prev__cctx != next->cctx))
821	{	1212	{
822	prev__cctx->top_env = PL_top_env;	1213	prev__cctx->top_env = PL_top_env;
823	PL_top_env = next->cctx->top_env;	1214	PL_top_env = next->cctx->top_env;
824	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1215	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
825	}	1216	}
826		1217
827	free_coro_mortal ();	1218	free_coro_mortal (aTHX);
828	UNLOCK;	1219	UNLOCK;
		1220
		1221	if (expect_false (has_throw))
		1222	{
		1223	struct coro *coro = SvSTATE (coro_current);
		1224
		1225	if (coro->throw)
		1226	{
		1227	SV *exception = coro->throw;
		1228	coro->throw = 0;
		1229	sv_setsv (ERRSV, exception);
		1230	croak (0);
		1231	}
		1232	}
829	}	1233	}
830	}	1234	}
831		1235
832	struct transfer_args	1236	struct transfer_args
833	{	1237	{
834	struct coro *prev, *next;	1238	struct coro *prev, *next;
835	};	1239	};
836		1240
837	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1241	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1242	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
838		1243
839	/** high level stuff ********************************************************/	1244	/** high level stuff ********************************************************/
840		1245
841	static int	1246	static int
842	coro_state_destroy (struct coro *coro)	1247	coro_state_destroy (pTHX_ struct coro *coro)
843	{	1248	{
844	if (coro->flags & CF_DESTROYED)	1249	if (coro->flags & CF_DESTROYED)
845	return 0;	1250	return 0;
846		1251
847	coro->flags |= CF_DESTROYED;	1252	coro->flags |= CF_DESTROYED;
…		…
859		1264
860	if (coro->mainstack && coro->mainstack != main_mainstack)	1265	if (coro->mainstack && coro->mainstack != main_mainstack)
861	{	1266	{
862	struct coro temp;	1267	struct coro temp;
863		1268
864	assert (!(coro->flags & CF_RUNNING));
865
866	Zero (&temp, 1, struct coro);
867	temp.save = CORO_SAVE_ALL;
868
869	if (coro->flags & CF_RUNNING)	1269	if (coro->flags & CF_RUNNING)
870	croak ("FATAL: tried to destroy currently running coroutine");	1270	croak ("FATAL: tried to destroy currently running coroutine");
871		1271
872	save_perl (&temp);	1272	save_perl (aTHX_ &temp);
873	load_perl (coro);	1273	load_perl (aTHX_ coro);
874		1274
875	coro_destroy_stacks ();	1275	coro_destroy (aTHX_ coro);
876		1276
877	load_perl (&temp); /* this will get rid of defsv etc.. */	1277	load_perl (aTHX_ &temp);
878		1278
879	coro->mainstack = 0;	1279	coro->slot = 0;
880	}	1280	}
881		1281
882	cctx_destroy (coro->cctx);	1282	cctx_destroy (coro->cctx);
883	SvREFCNT_dec (coro->args);	1283	SvREFCNT_dec (coro->args);
884		1284
		1285	if (coro->next) coro->next->prev = coro->prev;
		1286	if (coro->prev) coro->prev->next = coro->next;
		1287	if (coro == coro_first) coro_first = coro->next;
		1288
885	return 1;	1289	return 1;
886	}	1290	}
887		1291
888	static int	1292	static int
889	coro_state_free (pTHX_ SV *sv, MAGIC *mg)	1293	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
890	{	1294	{
891	struct coro *coro = (struct coro *)mg->mg_ptr;	1295	struct coro *coro = (struct coro *)mg->mg_ptr;
892	mg->mg_ptr = 0;	1296	mg->mg_ptr = 0;
893		1297
		1298	coro->hv = 0;
		1299
894	if (--coro->refcnt < 0)	1300	if (--coro->refcnt < 0)
895	{	1301	{
896	coro_state_destroy (coro);	1302	coro_state_destroy (aTHX_ coro);
897	Safefree (coro);	1303	Safefree (coro);
898	}	1304	}
899		1305
900	return 0;	1306	return 0;
901	}	1307	}
…		…
919	#else	1325	#else
920	# define MGf_DUP 0	1326	# define MGf_DUP 0
921	#endif	1327	#endif
922	};	1328	};
923		1329
924	static struct coro *
925	SvSTATE (SV *coro)
926	{
927	HV *stash;
928	MAGIC *mg;
929
930	if (SvROK (coro))
931	coro = SvRV (coro);
932
933	stash = SvSTASH (coro);
934	if (stash != coro_stash && stash != coro_state_stash)
935	{
936	/* very slow, but rare, check */
937	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
938	croak ("Coro::State object required");
939	}
940
941	mg = SvMAGIC (coro);
942	assert (mg->mg_type == PERL_MAGIC_ext);
943	return (struct coro *)mg->mg_ptr;
944	}
945
946	static void	1330	static void
947	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1331	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
948	{	1332	{
949	ta->prev = SvSTATE (prev_sv);	1333	ta->prev = SvSTATE (prev_sv);
950	ta->next = SvSTATE (next_sv);	1334	ta->next = SvSTATE (next_sv);
		1335	TRANSFER_CHECK (*ta);
951	}	1336	}
952		1337
953	static void	1338	static void
954	api_transfer (SV *prev_sv, SV *next_sv)	1339	api_transfer (SV *prev_sv, SV *next_sv)
955	{	1340	{
		1341	dTHX;
956	struct transfer_args ta;	1342	struct transfer_args ta;
957		1343
958	prepare_transfer (&ta, prev_sv, next_sv);	1344	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
959	TRANSFER (ta);	1345	TRANSFER (ta);
960	}	1346	}
961		1347
962	static int
963	api_save (SV *coro_sv, int new_save)
964	{
965	struct coro *coro = SvSTATE (coro_sv);
966	int old_save = coro->save;
967
968	if (new_save >= 0)
969	coro->save = new_save;
970
971	return old_save;
972	}
973
974	/** Coro ********************************************************************/	1348	/** Coro ********************************************************************/
975		1349
976	static void	1350	static void
977	coro_enq (SV *coro_sv)	1351	coro_enq (pTHX_ SV *coro_sv)
978	{	1352	{
979	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1353	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
980	}	1354	}
981		1355
982	static SV *	1356	static SV *
983	coro_deq (int min_prio)	1357	coro_deq (pTHX)
984	{	1358	{
985	int prio = PRIO_MAX - PRIO_MIN;	1359	int prio;
986		1360
987	min_prio -= PRIO_MIN;
988	if (min_prio < 0)
989	min_prio = 0;
990
991	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1361	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
992	if (AvFILLp (coro_ready [prio]) >= 0)	1362	if (AvFILLp (coro_ready [prio]) >= 0)
993	return av_shift (coro_ready [prio]);	1363	return av_shift (coro_ready [prio]);
994		1364
995	return 0;	1365	return 0;
996	}	1366	}
997		1367
998	static int	1368	static int
999	api_ready (SV *coro_sv)	1369	api_ready (SV *coro_sv)
1000	{	1370	{
		1371	dTHX;
1001	struct coro *coro;	1372	struct coro *coro;
1002		1373
1003	if (SvROK (coro_sv))	1374	if (SvROK (coro_sv))
1004	coro_sv = SvRV (coro_sv);	1375	coro_sv = SvRV (coro_sv);
1005		1376
…		…
1009	return 0;	1380	return 0;
1010		1381
1011	coro->flags |= CF_READY;	1382	coro->flags |= CF_READY;
1012		1383
1013	LOCK;	1384	LOCK;
1014	coro_enq (SvREFCNT_inc (coro_sv));	1385	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1015	++coro_nready;	1386	++coro_nready;
1016	UNLOCK;	1387	UNLOCK;
1017		1388
1018	return 1;	1389	return 1;
1019	}	1390	}
1020		1391
1021	static int	1392	static int
1022	api_is_ready (SV *coro_sv)	1393	api_is_ready (SV *coro_sv)
1023	{	1394	{
		1395	dTHX;
1024	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1396	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1025	}	1397	}
1026		1398
1027	static void	1399	static void
1028	prepare_schedule (struct transfer_args *ta)	1400	prepare_schedule (pTHX_ struct transfer_args *ta)
1029	{	1401	{
1030	SV *prev_sv, *next_sv;	1402	SV *prev_sv, *next_sv;
1031		1403
1032	for (;;)	1404	for (;;)
1033	{	1405	{
1034	LOCK;	1406	LOCK;
1035	next_sv = coro_deq (PRIO_MIN);	1407	next_sv = coro_deq (aTHX);
1036		1408
1037	/* nothing to schedule: call the idle handler */	1409	/* nothing to schedule: call the idle handler */
1038	if (!next_sv)	1410	if (expect_false (!next_sv))
1039	{	1411	{
1040	dSP;	1412	dSP;
1041	UNLOCK;	1413	UNLOCK;
1042		1414
1043	ENTER;	1415	ENTER;
1044	SAVETMPS;	1416	SAVETMPS;
1045		1417
1046	PUSHMARK (SP);	1418	PUSHMARK (SP);
1047	PUTBACK;	1419	PUTBACK;
1048	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1420	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1421	SPAGAIN;
1049		1422
1050	FREETMPS;	1423	FREETMPS;
1051	LEAVE;	1424	LEAVE;
1052	continue;	1425	continue;
1053	}	1426	}
1054		1427
1055	ta->next = SvSTATE (next_sv);	1428	ta->next = SvSTATE (next_sv);
1056		1429
1057	/* cannot transfer to destroyed coros, skip and look for next */	1430	/* cannot transfer to destroyed coros, skip and look for next */
1058	if (ta->next->flags & CF_DESTROYED)	1431	if (expect_false (ta->next->flags & CF_DESTROYED))
1059	{	1432	{
1060	UNLOCK;	1433	UNLOCK;
1061	SvREFCNT_dec (next_sv);	1434	SvREFCNT_dec (next_sv);
1062	/* coro_nready is already taken care of by destroy */	1435	/* coro_nready is already taken care of by destroy */
1063	continue;	1436	continue;
…		…
1068	break;	1441	break;
1069	}	1442	}
1070		1443
1071	/* free this only after the transfer */	1444	/* free this only after the transfer */
1072	prev_sv = SvRV (coro_current);	1445	prev_sv = SvRV (coro_current);
1073	SvRV_set (coro_current, next_sv);
1074	ta->prev = SvSTATE (prev_sv);	1446	ta->prev = SvSTATE (prev_sv);
1075		1447	TRANSFER_CHECK (*ta);
1076	assert (ta->next->flags & CF_READY);	1448	assert (ta->next->flags & CF_READY);
1077	ta->next->flags &= ~CF_READY;	1449	ta->next->flags &= ~CF_READY;
		1450	SvRV_set (coro_current, next_sv);
1078		1451
1079	LOCK;	1452	LOCK;
1080	free_coro_mortal ();	1453	free_coro_mortal (aTHX);
1081	coro_mortal = prev_sv;	1454	coro_mortal = prev_sv;
1082	UNLOCK;	1455	UNLOCK;
1083	}	1456	}
1084		1457
1085	static void	1458	static void
1086	prepare_cede (struct transfer_args *ta)	1459	prepare_cede (pTHX_ struct transfer_args *ta)
1087	{	1460	{
1088	api_ready (coro_current);	1461	api_ready (coro_current);
1089	prepare_schedule (ta);	1462	prepare_schedule (aTHX_ ta);
1090	}	1463	}
1091		1464
1092	static int	1465	static int
1093	prepare_cede_notself (struct transfer_args *ta)	1466	prepare_cede_notself (pTHX_ struct transfer_args *ta)
1094	{	1467	{
1095	if (coro_nready)	1468	if (coro_nready)
1096	{	1469	{
1097	SV *prev = SvRV (coro_current);	1470	SV *prev = SvRV (coro_current);
1098	prepare_schedule (ta);	1471	prepare_schedule (aTHX_ ta);
1099	api_ready (prev);	1472	api_ready (prev);
1100	return 1;	1473	return 1;
1101	}	1474	}
1102	else	1475	else
1103	return 0;	1476	return 0;
1104	}	1477	}
1105		1478
1106	static void	1479	static void
1107	api_schedule (void)	1480	api_schedule (void)
1108	{	1481	{
		1482	dTHX;
1109	struct transfer_args ta;	1483	struct transfer_args ta;
1110		1484
1111	prepare_schedule (&ta);	1485	prepare_schedule (aTHX_ &ta);
1112	TRANSFER (ta);	1486	TRANSFER (ta);
1113	}	1487	}
1114		1488
1115	static int	1489	static int
1116	api_cede (void)	1490	api_cede (void)
1117	{	1491	{
		1492	dTHX;
1118	struct transfer_args ta;	1493	struct transfer_args ta;
1119		1494
1120	prepare_cede (&ta);	1495	prepare_cede (aTHX_ &ta);
1121		1496
1122	if (ta.prev != ta.next)	1497	if (expect_true (ta.prev != ta.next))
1123	{	1498	{
1124	TRANSFER (ta);	1499	TRANSFER (ta);
1125	return 1;	1500	return 1;
1126	}	1501	}
1127	else	1502	else
…		…
1129	}	1504	}
1130		1505
1131	static int	1506	static int
1132	api_cede_notself (void)	1507	api_cede_notself (void)
1133	{	1508	{
		1509	dTHX;
1134	struct transfer_args ta;	1510	struct transfer_args ta;
1135		1511
1136	if (prepare_cede_notself (&ta))	1512	if (prepare_cede_notself (aTHX_ &ta))
1137	{	1513	{
1138	TRANSFER (ta);	1514	TRANSFER (ta);
1139	return 1;	1515	return 1;
1140	}	1516	}
1141	else	1517	else
1142	return 0;	1518	return 0;
1143	}	1519	}
1144		1520
		1521	static void
		1522	api_trace (SV *coro_sv, int flags)
		1523	{
		1524	dTHX;
		1525	struct coro *coro = SvSTATE (coro_sv);
		1526
		1527	if (flags & CC_TRACE)
		1528	{
		1529	if (!coro->cctx)
		1530	coro->cctx = cctx_new ();
		1531	else if (!(coro->cctx->flags & CC_TRACE))
		1532	croak ("cannot enable tracing on coroutine with custom stack");
		1533
		1534	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1535	}
		1536	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1537	{
		1538	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1539
		1540	if (coro->flags & CF_RUNNING)
		1541	PL_runops = RUNOPS_DEFAULT;
		1542	else
		1543	coro->slot->runops = RUNOPS_DEFAULT;
		1544	}
		1545	}
		1546
1145	MODULE = Coro::State PACKAGE = Coro::State	1547	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1146		1548
1147	PROTOTYPES: DISABLE	1549	PROTOTYPES: DISABLE
1148		1550
1149	BOOT:	1551	BOOT:
1150	{	1552	{
1151	#ifdef USE_ITHREADS	1553	#ifdef USE_ITHREADS
1152	MUTEX_INIT (&coro_mutex);	1554	MUTEX_INIT (&coro_mutex);
1153	#endif	1555	#endif
1154	BOOT_PAGESIZE;	1556	BOOT_PAGESIZE;
1155		1557
		1558	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1559	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1560
		1561	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1562	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1563	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1564	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1565
		1566	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1567	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1568	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1569
1156	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1570	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1157		1571
		1572	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1573	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1158	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1574	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1159	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1160	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1161	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1162	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1575	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1163		1576
1164	main_mainstack = PL_mainstack;	1577	main_mainstack = PL_mainstack;
		1578	main_top_env = PL_top_env;
		1579
		1580	while (main_top_env->je_prev)
		1581	main_top_env = main_top_env->je_prev;
1165		1582
1166	coroapi.ver = CORO_API_VERSION;	1583	coroapi.ver = CORO_API_VERSION;
		1584	coroapi.rev = CORO_API_REVISION;
1167	coroapi.transfer = api_transfer;	1585	coroapi.transfer = api_transfer;
1168		1586
1169	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1587	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1170	}	1588	}
1171		1589
1172	SV *	1590	SV *
1173	new (char *klass, ...)	1591	new (char *klass, ...)
1174	CODE:	1592	CODE:
1175	{	1593	{
1176	struct coro *coro;	1594	struct coro *coro;
		1595	MAGIC *mg;
1177	HV *hv;	1596	HV *hv;
1178	int i;	1597	int i;
1179		1598
1180	Newz (0, coro, 1, struct coro);	1599	Newz (0, coro, 1, struct coro);
1181	coro->args = newAV ();	1600	coro->args = newAV ();
1182	coro->save = CORO_SAVE_ALL;
1183	coro->flags = CF_NEW;	1601	coro->flags = CF_NEW;
1184		1602
		1603	if (coro_first) coro_first->prev = coro;
		1604	coro->next = coro_first;
		1605	coro_first = coro;
		1606
1185	hv = newHV ();	1607	coro->hv = hv = newHV ();
1186	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1608	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1609	mg->mg_flags |= MGf_DUP;
1187	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1610	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1188		1611
		1612	av_extend (coro->args, items - 1);
1189	for (i = 1; i < items; i++)	1613	for (i = 1; i < items; i++)
1190	av_push (coro->args, newSVsv (ST (i)));	1614	av_push (coro->args, newSVsv (ST (i)));
1191	}	1615	}
1192	OUTPUT:	1616	OUTPUT:
1193	RETVAL	1617	RETVAL
1194		1618
1195	int	1619	# these not obviously related functions are all rolled into the same xs
1196	save (SV *coro, int new_save = -1)	1620	# function to increase chances that they all will call transfer with the same
1197	CODE:	1621	# stack offset
1198	RETVAL = api_save (coro, new_save);
1199	OUTPUT:
1200	RETVAL
1201
1202	void	1622	void
1203	_set_stacklevel (...)	1623	_set_stacklevel (...)
1204	ALIAS:	1624	ALIAS:
1205	Coro::State::transfer = 1	1625	Coro::State::transfer = 1
1206	Coro::schedule = 2	1626	Coro::schedule = 2
…		…
1208	Coro::cede_notself = 4	1628	Coro::cede_notself = 4
1209	CODE:	1629	CODE:
1210	{	1630	{
1211	struct transfer_args ta;	1631	struct transfer_args ta;
1212		1632
		1633	PUTBACK;
1213	switch (ix)	1634	switch (ix)
1214	{	1635	{
1215	case 0:	1636	case 0:
1216	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1637	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1217	ta.next = 0;	1638	ta.next = 0;
…		…
1219		1640
1220	case 1:	1641	case 1:
1221	if (items != 2)	1642	if (items != 2)
1222	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1643	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1223		1644
1224	prepare_transfer (&ta, ST (0), ST (1));	1645	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1225	break;	1646	break;
1226		1647
1227	case 2:	1648	case 2:
1228	prepare_schedule (&ta);	1649	prepare_schedule (aTHX_ &ta);
1229	break;	1650	break;
1230		1651
1231	case 3:	1652	case 3:
1232	prepare_cede (&ta);	1653	prepare_cede (aTHX_ &ta);
1233	break;	1654	break;
1234		1655
1235	case 4:	1656	case 4:
1236	if (!prepare_cede_notself (&ta))	1657	if (!prepare_cede_notself (aTHX_ &ta))
1237	XSRETURN_EMPTY;	1658	XSRETURN_EMPTY;
1238		1659
1239	break;	1660	break;
1240	}	1661	}
		1662	SPAGAIN;
1241		1663
1242	BARRIER;	1664	BARRIER;
		1665	PUTBACK;
1243	TRANSFER (ta);	1666	TRANSFER (ta);
1244		1667	SPAGAIN; /* might be the sp of a different coroutine now */
1245	if (GIMME_V != G_VOID && ta.next != ta.prev)	1668	/* be extra careful not to ever do anything after TRANSFER */
1246	XSRETURN_YES;
1247	}	1669	}
1248		1670
1249	bool	1671	bool
1250	_destroy (SV *coro_sv)	1672	_destroy (SV *coro_sv)
1251	CODE:	1673	CODE:
1252	RETVAL = coro_state_destroy (SvSTATE (coro_sv));	1674	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1253	OUTPUT:	1675	OUTPUT:
1254	RETVAL	1676	RETVAL
1255		1677
1256	void	1678	void
1257	_exit (code)	1679	_exit (code)
…		…
1259	PROTOTYPE: $	1681	PROTOTYPE: $
1260	CODE:	1682	CODE:
1261	_exit (code);	1683	_exit (code);
1262		1684
1263	int	1685	int
		1686	cctx_stacksize (int new_stacksize = 0)
		1687	CODE:
		1688	RETVAL = coro_stacksize;
		1689	if (new_stacksize)
		1690	coro_stacksize = new_stacksize;
		1691	OUTPUT:
		1692	RETVAL
		1693
		1694	int
1264	cctx_count ()	1695	cctx_count ()
1265	CODE:	1696	CODE:
1266	RETVAL = cctx_count;	1697	RETVAL = cctx_count;
1267	OUTPUT:	1698	OUTPUT:
1268	RETVAL	1699	RETVAL
…		…
1272	CODE:	1703	CODE:
1273	RETVAL = cctx_idle;	1704	RETVAL = cctx_idle;
1274	OUTPUT:	1705	OUTPUT:
1275	RETVAL	1706	RETVAL
1276		1707
		1708	void
		1709	list ()
		1710	PPCODE:
		1711	{
		1712	struct coro *coro;
		1713	for (coro = coro_first; coro; coro = coro->next)
		1714	if (coro->hv)
		1715	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1716	}
		1717
		1718	void
		1719	call (Coro::State coro, SV *coderef)
		1720	ALIAS:
		1721	eval = 1
		1722	CODE:
		1723	{
		1724	if (coro->mainstack)
		1725	{
		1726	struct coro temp;
		1727
		1728	if (!(coro->flags & CF_RUNNING))
		1729	{
		1730	PUTBACK;
		1731	save_perl (aTHX_ &temp);
		1732	load_perl (aTHX_ coro);
		1733	}
		1734
		1735	{
		1736	dSP;
		1737	ENTER;
		1738	SAVETMPS;
		1739	PUTBACK;
		1740	PUSHSTACK;
		1741	PUSHMARK (SP);
		1742
		1743	if (ix)
		1744	eval_sv (coderef, 0);
		1745	else
		1746	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1747
		1748	POPSTACK;
		1749	SPAGAIN;
		1750	FREETMPS;
		1751	LEAVE;
		1752	PUTBACK;
		1753	}
		1754
		1755	if (!(coro->flags & CF_RUNNING))
		1756	{
		1757	save_perl (aTHX_ coro);
		1758	load_perl (aTHX_ &temp);
		1759	SPAGAIN;
		1760	}
		1761	}
		1762	}
		1763
		1764	SV *
		1765	is_ready (Coro::State coro)
		1766	PROTOTYPE: $
		1767	ALIAS:
		1768	is_ready = CF_READY
		1769	is_running = CF_RUNNING
		1770	is_new = CF_NEW
		1771	is_destroyed = CF_DESTROYED
		1772	CODE:
		1773	RETVAL = boolSV (coro->flags & ix);
		1774	OUTPUT:
		1775	RETVAL
		1776
		1777	void
		1778	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1779
		1780	SV *
		1781	has_stack (Coro::State coro)
		1782	PROTOTYPE: $
		1783	CODE:
		1784	RETVAL = boolSV (!!coro->cctx);
		1785	OUTPUT:
		1786	RETVAL
		1787
		1788	int
		1789	is_traced (Coro::State coro)
		1790	PROTOTYPE: $
		1791	CODE:
		1792	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1793	OUTPUT:
		1794	RETVAL
		1795
		1796	IV
		1797	rss (Coro::State coro)
		1798	PROTOTYPE: $
		1799	ALIAS:
		1800	usecount = 1
		1801	CODE:
		1802	switch (ix)
		1803	{
		1804	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1805	case 1: RETVAL = coro->usecount; break;
		1806	}
		1807	OUTPUT:
		1808	RETVAL
		1809
		1810
1277	MODULE = Coro::State PACKAGE = Coro	1811	MODULE = Coro::State PACKAGE = Coro
1278		1812
1279	BOOT:	1813	BOOT:
1280	{	1814	{
1281	int i;	1815	int i;
1282		1816
		1817	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1818	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1819	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1820
		1821	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1822	SvREADONLY_on (coro_current);
		1823
1283	coro_stash = gv_stashpv ("Coro", TRUE);	1824	coro_stash = gv_stashpv ("Coro", TRUE);
1284		1825
1285	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1826	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1286	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1827	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1287	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1828	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1288	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1829	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1289	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1830	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1290	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1831	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1291		1832
1292	coro_current = get_sv ("Coro::current", FALSE);
1293	SvREADONLY_on (coro_current);
1294
1295	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1833	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1296	coro_ready[i] = newAV ();	1834	coro_ready[i] = newAV ();
1297		1835
1298	{	1836	{
1299	SV *sv = perl_get_sv("Coro::API", 1);	1837	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1838	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1300		1839
1301	coroapi.schedule = api_schedule;	1840	coroapi.schedule = api_schedule;
1302	coroapi.save = api_save;
1303	coroapi.cede = api_cede;	1841	coroapi.cede = api_cede;
1304	coroapi.cede_notself = api_cede_notself;	1842	coroapi.cede_notself = api_cede_notself;
1305	coroapi.ready = api_ready;	1843	coroapi.ready = api_ready;
1306	coroapi.is_ready = api_is_ready;	1844	coroapi.is_ready = api_is_ready;
1307	coroapi.nready = &coro_nready;	1845	coroapi.nready = &coro_nready;
…		…
1348	CODE:	1886	CODE:
1349	RETVAL = boolSV (api_ready (self));	1887	RETVAL = boolSV (api_ready (self));
1350	OUTPUT:	1888	OUTPUT:
1351	RETVAL	1889	RETVAL
1352		1890
1353	SV *
1354	is_ready (SV *self)
1355	PROTOTYPE: $
1356	CODE:
1357	RETVAL = boolSV (api_is_ready (self));
1358	OUTPUT:
1359	RETVAL
1360
1361	int	1891	int
1362	nready (...)	1892	nready (...)
1363	PROTOTYPE:	1893	PROTOTYPE:
1364	CODE:	1894	CODE:
1365	RETVAL = coro_nready;	1895	RETVAL = coro_nready;
1366	OUTPUT:	1896	OUTPUT:
1367	RETVAL	1897	RETVAL
1368		1898
		1899	void
		1900	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1901	PROTOTYPE: $;$
		1902	CODE:
		1903	SvREFCNT_dec (self->throw);
		1904	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1905
		1906	void
		1907	swap_defsv (Coro::State self)
		1908	PROTOTYPE: $
		1909	ALIAS:
		1910	swap_defav = 1
		1911	CODE:
		1912	if (!self->slot)
		1913	croak ("cannot swap state with coroutine that has no saved state");
		1914	else
		1915	{
		1916	SV **src = ix ? (SV *)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1917	SV **dst = ix ? self->slot->defav : self->slot->defsv;
		1918
		1919	SV *tmp = *src; *src = *dst; *dst = tmp;
		1920	}
		1921
		1922	# for async_pool speedup
		1923	void
		1924	_pool_1 (SV *cb)
		1925	CODE:
		1926	{
		1927	struct coro *coro = SvSTATE (coro_current);
		1928	HV *hv = (HV *)SvRV (coro_current);
		1929	AV *defav = GvAV (PL_defgv);
		1930	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1931	AV *invoke_av;
		1932	int i, len;
		1933
		1934	if (!invoke)
		1935	{
		1936	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1937	croak ("\3async_pool terminate\2\n");
		1938	}
		1939
		1940	SvREFCNT_dec (coro->saved_deffh);
		1941	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1942
		1943	hv_store (hv, "desc", sizeof ("desc") - 1,
		1944	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1945
		1946	invoke_av = (AV *)SvRV (invoke);
		1947	len = av_len (invoke_av);
		1948
		1949	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1950
		1951	if (len > 0)
		1952	{
		1953	av_fill (defav, len - 1);
		1954	for (i = 0; i < len; ++i)
		1955	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1956	}
		1957
		1958	SvREFCNT_dec (invoke);
		1959	}
		1960
		1961	void
		1962	_pool_2 (SV *cb)
		1963	CODE:
		1964	{
		1965	struct coro *coro = SvSTATE (coro_current);
		1966
		1967	sv_setsv (cb, &PL_sv_undef);
		1968
		1969	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1970	coro->saved_deffh = 0;
		1971
		1972	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1973	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1974	{
		1975	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1976	croak ("\3async_pool terminate\2\n");
		1977	}
		1978
		1979	av_clear (GvAV (PL_defgv));
		1980	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1981	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1982
		1983	coro->prio = 0;
		1984
		1985	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1986	api_trace (coro_current, 0);
		1987
		1988	av_push (av_async_pool, newSVsv (coro_current));
		1989	}
		1990
		1991
1369	MODULE = Coro::State PACKAGE = Coro::AIO	1992	MODULE = Coro::State PACKAGE = Coro::AIO
1370		1993
1371	SV *	1994	SV *
1372	_get_state ()	1995	_get_state ()
1373	CODE:	1996	CODE:

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