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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.141 by root, Mon Jan 22 18:45:17 2007 UTC vs.
Revision 1.215 by root, Sun Oct 14 19:34:09 2007 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
…		…
31	#else	35	#else
32	# define PAGESIZE 0	36	# define PAGESIZE 0
33	# define BOOT_PAGESIZE (void)0	37	# define BOOT_PAGESIZE (void)0
34	#endif	38	#endif
35		39
36	#if USE_VALGRIND	40	#if CORO_USE_VALGRIND
37	# include <valgrind/valgrind.h>	41	# include <valgrind/valgrind.h>
38	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))	42	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
39	#else	43	#else
40	# define REGISTER_STACK(cctx,start,end)	44	# define REGISTER_STACK(cctx,start,end)
41	#endif	45	#endif
…		…
73	/* 5.8.7 */	77	/* 5.8.7 */
74	#ifndef SvRV_set	78	#ifndef SvRV_set
75	# define SvRV_set(s,v) SvRV(s) = (v)	79	# define SvRV_set(s,v) SvRV(s) = (v)
76	#endif	80	#endif
77		81
		82	/* 5.8.8 */
		83	#ifndef GV_NOTQUAL
		84	# define GV_NOTQUAL 0
		85	#endif
		86	#ifndef newSV
		87	# define newSV(l) NEWSV(0,l)
		88	#endif
		89
78	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	90	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
79	# undef STACKGUARD	91	# undef CORO_STACKGUARD
80	#endif	92	#endif
81		93
82	#ifndef STACKGUARD	94	#ifndef CORO_STACKGUARD
83	# define STACKGUARD 0	95	# define CORO_STACKGUARD 0
84	#endif	96	#endif
85		97
86	/* prefer perl internal functions over our own? */	98	/* prefer perl internal functions over our own? */
87	#ifndef PREFER_PERL_FUNCTIONS	99	#ifndef CORO_PREFER_PERL_FUNCTIONS
88	# define PREFER_PERL_FUNCTIONS 0	100	# define CORO_PREFER_PERL_FUNCTIONS 0
89	#endif	101	#endif
90		102
91	/* The next macro should declare a variable stacklevel that contains and approximation	103	/* 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	104	* portable way as possible. */
93	* and should be unique. */
94	#define dSTACKLEVEL int stacklevel	105	#define dSTACKLEVEL volatile char stacklevel
95	#define STACKLEVEL ((void *)&stacklevel)	106	#define STACKLEVEL ((void *)&stacklevel)
96		107
97	#define IN_DESTRUCT (PL_main_cv == Nullcv)	108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
98		109
99	#if __GNUC__ >= 3	110	#if __GNUC__ >= 3
100	# define attribute(x) __attribute__(x)	111	# define attribute(x) __attribute__(x)
101	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	112	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		113	# define expect(expr,value) __builtin_expect ((expr),(value))
102	#else	114	#else
103	# define attribute(x)	115	# define attribute(x)
104	# define BARRIER	116	# define BARRIER
		117	# define expect(expr,value) (expr)
105	#endif	118	#endif
		119
		120	#define expect_false(expr) expect ((expr) != 0, 0)
		121	#define expect_true(expr) expect ((expr) != 0, 1)
106		122
107	#define NOINLINE attribute ((noinline))	123	#define NOINLINE attribute ((noinline))
108		124
109	#include "CoroAPI.h"	125	#include "CoroAPI.h"
110		126
…		…
124	I32 laststype;	140	I32 laststype;
125	int laststatval;	141	int laststatval;
126	Stat_t statcache;	142	Stat_t statcache;
127	};	143	};
128		144
		145	static size_t coro_stacksize = CORO_STACKSIZE;
129	static struct CoroAPI coroapi;	146	static struct CoroAPI coroapi;
130	static AV *main_mainstack; /* used to differentiate between $main and others */	147	static AV *main_mainstack; /* used to differentiate between $main and others */
		148	static JMPENV *main_top_env;
131	static HV *coro_state_stash, *coro_stash;	149	static HV *coro_state_stash, *coro_stash;
132	static SV *coro_mortal; /* will be freed after next transfer */	150	static SV *coro_mortal; /* will be freed after next transfer */
133		151
		152	static GV *irsgv; /* $/ */
		153	static GV *stdoutgv; /* *STDOUT */
		154	static SV *rv_diehook;
		155	static SV *rv_warnhook;
		156	static HV *hv_sig; /* %SIG */
		157
		158	/* async_pool helper stuff */
		159	static SV *sv_pool_rss;
		160	static SV *sv_pool_size;
		161	static AV *av_async_pool;
		162
134	static struct coro_cctx *cctx_first;	163	static struct coro_cctx *cctx_first;
135	static int cctx_count, cctx_idle;	164	static int cctx_count, cctx_idle;
		165
		166	enum {
		167	CC_MAPPED = 0x01,
		168	CC_NOREUSE = 0x02, /* throw this away after tracing */
		169	CC_TRACE = 0x04,
		170	CC_TRACE_SUB = 0x08, /* trace sub calls */
		171	CC_TRACE_LINE = 0x10, /* trace each statement */
		172	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		173	};
136		174
137	/* this is a structure representing a c-level coroutine */	175	/* this is a structure representing a c-level coroutine */
138	typedef struct coro_cctx {	176	typedef struct coro_cctx {
139	struct coro_cctx *next;	177	struct coro_cctx *next;
140		178
141	/* the stack */	179	/* the stack */
142	void *sptr;	180	void *sptr;
143	ssize_t ssize; /* positive == mmap, otherwise malloc */	181	size_t ssize;
144		182
145	/* cpu state */	183	/* cpu state */
146	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	184	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 */	185	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
148	JMPENV *top_env;	186	JMPENV *top_env;
149	coro_context cctx;	187	coro_context cctx;
150		188
151	int inuse;
152
153	#if USE_VALGRIND	189	#if CORO_USE_VALGRIND
154	int valgrind_id;	190	int valgrind_id;
155	#endif	191	#endif
		192	unsigned char flags;
156	} coro_cctx;	193	} coro_cctx;
157		194
158	enum {	195	enum {
159	CF_RUNNING = 0x0001, /* coroutine is running */	196	CF_RUNNING = 0x0001, /* coroutine is running */
160	CF_READY = 0x0002, /* coroutine is ready */	197	CF_READY = 0x0002, /* coroutine is ready */
161	CF_NEW = 0x0004, /* has never been switched to */	198	CF_NEW = 0x0004, /* has never been switched to */
162	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	199	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
163	};	200	};
164		201
		202	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		203	typedef struct {
		204	SV *defsv;
		205	AV *defav;
		206	SV *errsv;
		207	SV *irsgv;
		208	#define VAR(name,type) type name;
		209	# include "state.h"
		210	#undef VAR
		211	} perl_slots;
		212
		213	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		214
165	/* this is a structure representing a perl-level coroutine */	215	/* this is a structure representing a perl-level coroutine */
166	struct coro {	216	struct coro {
167	/* the c coroutine allocated to this perl coroutine, if any */	217	/* the c coroutine allocated to this perl coroutine, if any */
168	coro_cctx *cctx;	218	coro_cctx *cctx;
169		219
		220	/* process data */
		221	AV *mainstack;
		222	perl_slots *slot; /* basically the saved sp */
		223
170	/* data associated with this coroutine (initial args) */	224	AV *args; /* data associated with this coroutine (initial args) */
171	AV *args;	225	int refcnt; /* coroutines are refcounted, yes */
172	int refcnt;
173	int save; /* CORO_SAVE flags */
174	int flags; /* CF_ flags */	226	int flags; /* CF_ flags */
		227	HV *hv; /* the perl hash associated with this coro, if any */
175		228
176	/* optionally saved, might be zero */	229	/* statistics */
177	AV *defav; /* @_ */	230	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		231
187	/* coro process data */	232	/* coro process data */
188	int prio;	233	int prio;
		234	SV *throw; /* exception to be thrown */
		235
		236	/* async_pool */
		237	SV *saved_deffh;
		238
		239	/* linked list */
		240	struct coro *next, *prev;
189	};	241	};
190		242
191	typedef struct coro *Coro__State;	243	typedef struct coro *Coro__State;
192	typedef struct coro *Coro__State_or_hashref;	244	typedef struct coro *Coro__State_or_hashref;
193		245
…		…
202		254
203	/* for Coro.pm */	255	/* for Coro.pm */
204	static SV *coro_current;	256	static SV *coro_current;
205	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	257	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
206	static int coro_nready;	258	static int coro_nready;
		259	static struct coro *coro_first;
207		260
208	/** lowlevel stuff **********************************************************/	261	/** lowlevel stuff **********************************************************/
209		262
		263	static SV *
		264	coro_get_sv (pTHX_ const char *name, int create)
		265	{
		266	#if PERL_VERSION_ATLEAST (5,9,0)
		267	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		268	get_sv (name, create);
		269	#endif
		270	return get_sv (name, create);
		271	}
		272
210	static AV *	273	static AV *
		274	coro_get_av (pTHX_ const char *name, int create)
		275	{
		276	#if PERL_VERSION_ATLEAST (5,9,0)
		277	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		278	get_av (name, create);
		279	#endif
		280	return get_av (name, create);
		281	}
		282
		283	static HV *
		284	coro_get_hv (pTHX_ const char *name, int create)
		285	{
		286	#if PERL_VERSION_ATLEAST (5,9,0)
		287	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		288	get_hv (name, create);
		289	#endif
		290	return get_hv (name, create);
		291	}
		292
		293	static AV *
211	coro_clone_padlist (CV *cv)	294	coro_clone_padlist (pTHX_ CV *cv)
212	{	295	{
213	AV *padlist = CvPADLIST (cv);	296	AV *padlist = CvPADLIST (cv);
214	AV *newpadlist, *newpad;	297	AV *newpadlist, *newpad;
215		298
216	newpadlist = newAV ();	299	newpadlist = newAV ();
…		…
228		311
229	return newpadlist;	312	return newpadlist;
230	}	313	}
231		314
232	static void	315	static void
233	free_padlist (AV *padlist)	316	free_padlist (pTHX_ AV *padlist)
234	{	317	{
235	/* may be during global destruction */	318	/* may be during global destruction */
236	if (SvREFCNT (padlist))	319	if (SvREFCNT (padlist))
237	{	320	{
238	I32 i = AvFILLp (padlist);	321	I32 i = AvFILLp (padlist);
…		…
259	AV *padlist;	342	AV *padlist;
260	AV *av = (AV *)mg->mg_obj;	343	AV *av = (AV *)mg->mg_obj;
261		344
262	/* casting is fun. */	345	/* casting is fun. */
263	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	346	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264	free_padlist (padlist);	347	free_padlist (aTHX_ padlist);
265
266	SvREFCNT_dec (av);
267		348
268	return 0;	349	return 0;
269	}	350	}
270		351
271	#define PERL_MAGIC_coro PERL_MAGIC_ext	352	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		353	#define CORO_MAGIC_type_state PERL_MAGIC_ext
272		354
273	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	355	static MGVTBL coro_cv_vtbl = {
		356	0, 0, 0, 0,
		357	coro_cv_free
		358	};
274		359
275	#define CORO_MAGIC(cv) \	360	#define CORO_MAGIC(sv,type) \
276	SvMAGIC (cv) \	361	SvMAGIC (sv) \
277	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	362	? SvMAGIC (sv)->mg_type == type \
278	? SvMAGIC (cv) \	363	? SvMAGIC (sv) \
279	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	364	: mg_find (sv, type) \
280	: 0	365	: 0
281		366
		367	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		368	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		369
		370	static struct coro *
		371	SvSTATE_ (pTHX_ SV *coro)
		372	{
		373	HV *stash;
		374	MAGIC *mg;
		375
		376	if (SvROK (coro))
		377	coro = SvRV (coro);
		378
		379	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		380	croak ("Coro::State object required");
		381
		382	stash = SvSTASH (coro);
		383	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		384	{
		385	/* very slow, but rare, check */
		386	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		387	croak ("Coro::State object required");
		388	}
		389
		390	mg = CORO_MAGIC_state (coro);
		391	return (struct coro *)mg->mg_ptr;
		392	}
		393
		394	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		395
282	/* the next two functions merely cache the padlists */	396	/* the next two functions merely cache the padlists */
283	static void	397	static void
284	get_padlist (CV *cv)	398	get_padlist (pTHX_ CV *cv)
285	{	399	{
286	MAGIC *mg = CORO_MAGIC (cv);	400	MAGIC *mg = CORO_MAGIC_cv (cv);
287	AV *av;	401	AV *av;
288		402
289	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	403	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
290	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	404	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
291	else	405	else
292	{	406	{
293	#if PREFER_PERL_FUNCTIONS	407	#if CORO_PREFER_PERL_FUNCTIONS
294	/* this is probably cleaner, but also slower? */	408	/* this is probably cleaner, but also slower? */
295	CV *cp = Perl_cv_clone (cv);	409	CV *cp = Perl_cv_clone (cv);
296	CvPADLIST (cv) = CvPADLIST (cp);	410	CvPADLIST (cv) = CvPADLIST (cp);
297	CvPADLIST (cp) = 0;	411	CvPADLIST (cp) = 0;
298	SvREFCNT_dec (cp);	412	SvREFCNT_dec (cp);
299	#else	413	#else
300	CvPADLIST (cv) = coro_clone_padlist (cv);	414	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
301	#endif	415	#endif
302	}	416	}
303	}	417	}
304		418
305	static void	419	static void
306	put_padlist (CV *cv)	420	put_padlist (pTHX_ CV *cv)
307	{	421	{
308	MAGIC *mg = CORO_MAGIC (cv);	422	MAGIC *mg = CORO_MAGIC_cv (cv);
309	AV *av;	423	AV *av;
310		424
311	if (!mg)	425	if (expect_false (!mg))
312	{	426	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		427
319	av = (AV *)mg->mg_obj;	428	av = (AV *)mg->mg_obj;
320		429
321	if (AvFILLp (av) >= AvMAX (av))	430	if (expect_false (AvFILLp (av) >= AvMAX (av)))
322	av_extend (av, AvMAX (av) + 1);	431	av_extend (av, AvMAX (av) + 1);
323		432
324	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	433	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
325	}	434	}
326		435
327	/** load & save, init *******************************************************/	436	/** load & save, init *******************************************************/
328		437
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	438	static void
335	load_perl (Coro__State c)	439	load_perl (pTHX_ Coro__State c)
336	{	440	{
		441	perl_slots *slot = c->slot;
		442	c->slot = 0;
		443
		444	PL_mainstack = c->mainstack;
		445
		446	GvSV (PL_defgv) = slot->defsv;
		447	GvAV (PL_defgv) = slot->defav;
		448	GvSV (PL_errgv) = slot->errsv;
		449	GvSV (irsgv) = slot->irsgv;
		450
337	#define VAR(name,type) PL_ ## name = c->name;	451	#define VAR(name,type) PL_ ## name = slot->name;
338	# include "state.h"	452	# include "state.h"
339	#undef VAR	453	#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		454
356	{	455	{
357	dSP;	456	dSP;
		457
358	CV *cv;	458	CV *cv;
359		459
360	/* now do the ugly restore mess */	460	/* now do the ugly restore mess */
361	while ((cv = (CV *)POPs))	461	while (expect_true (cv = (CV *)POPs))
362	{	462	{
363	put_padlist (cv); /* mark this padlist as available */	463	put_padlist (aTHX_ cv); /* mark this padlist as available */
364	CvDEPTH (cv) = PTR2IV (POPs);	464	CvDEPTH (cv) = PTR2IV (POPs);
365	CvPADLIST (cv) = (AV *)POPs;	465	CvPADLIST (cv) = (AV *)POPs;
366	}	466	}
367		467
368	PUTBACK;	468	PUTBACK;
369	}	469	}
370	}	470	}
371		471
372	static void	472	static void
373	save_perl (Coro__State c)	473	save_perl (pTHX_ Coro__State c)
374	{	474	{
375	{	475	{
376	dSP;	476	dSP;
377	I32 cxix = cxstack_ix;	477	I32 cxix = cxstack_ix;
378	PERL_CONTEXT *ccstk = cxstack;	478	PERL_CONTEXT *ccstk = cxstack;
…		…
381	/*	481	/*
382	* the worst thing you can imagine happens first - we have to save	482	* the worst thing you can imagine happens first - we have to save
383	* (and reinitialize) all cv's in the whole callchain :(	483	* (and reinitialize) all cv's in the whole callchain :(
384	*/	484	*/
385		485
386	EXTEND (SP, 3 + 1);
387	PUSHs (Nullsv);	486	XPUSHs (Nullsv);
388	/* this loop was inspired by pp_caller */	487	/* this loop was inspired by pp_caller */
389	for (;;)	488	for (;;)
390	{	489	{
391	while (cxix >= 0)	490	while (expect_true (cxix >= 0))
392	{	491	{
393	PERL_CONTEXT *cx = &ccstk[cxix--];	492	PERL_CONTEXT *cx = &ccstk[cxix--];
394		493
395	if (CxTYPE (cx) == CXt_SUB)	494	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
396	{	495	{
397	CV *cv = cx->blk_sub.cv;	496	CV *cv = cx->blk_sub.cv;
398		497
399	if (CvDEPTH (cv))	498	if (expect_true (CvDEPTH (cv)))
400	{	499	{
401	EXTEND (SP, 3);	500	EXTEND (SP, 3);
402	PUSHs ((SV *)CvPADLIST (cv));	501	PUSHs ((SV *)CvPADLIST (cv));
403	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	502	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
404	PUSHs ((SV *)cv);	503	PUSHs ((SV *)cv);
405		504
406	CvDEPTH (cv) = 0;	505	CvDEPTH (cv) = 0;
407	get_padlist (cv);	506	get_padlist (aTHX_ cv);
408	}	507	}
409	}	508	}
410	}	509	}
411		510
412	if (top_si->si_type == PERLSI_MAIN)	511	if (expect_true (top_si->si_type == PERLSI_MAIN))
413	break;	512	break;
414		513
415	top_si = top_si->si_prev;	514	top_si = top_si->si_prev;
416	ccstk = top_si->si_cxstack;	515	ccstk = top_si->si_cxstack;
417	cxix = top_si->si_cxix;	516	cxix = top_si->si_cxix;
418	}	517	}
419		518
420	PUTBACK;	519	PUTBACK;
421	}	520	}
422		521
423	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	522	/* allocate some space on the context stack for our purposes */
424	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	523	/* we manually unroll here, as usually 2 slots is enough */
425	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	524	if (SLOT_COUNT >= 1) CXINC;
426	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	525	if (SLOT_COUNT >= 2) CXINC;
		526	if (SLOT_COUNT >= 3) CXINC;
		527	{
		528	int i;
		529	for (i = 3; i < SLOT_COUNT; ++i)
		530	CXINC;
		531	}
		532	cxstack_ix -= SLOT_COUNT; /* undo allocation */
427		533
		534	c->mainstack = PL_mainstack;
		535
		536	{
		537	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		538
		539	slot->defav = GvAV (PL_defgv);
		540	slot->defsv = DEFSV;
		541	slot->errsv = ERRSV;
		542	slot->irsgv = GvSV (irsgv);
		543
428	#define VAR(name,type)c->name = PL_ ## name;	544	#define VAR(name,type) slot->name = PL_ ## name;
429	# include "state.h"	545	# include "state.h"
430	#undef VAR	546	#undef VAR
		547	}
431	}	548	}
432		549
433	/*	550	/*
434	* allocate various perl stacks. This is an exact copy	551	* allocate various perl stacks. This is an exact copy
435	* of perl.c:init_stacks, except that it uses less memory	552	* of perl.c:init_stacks, except that it uses less memory
436	* on the (sometimes correct) assumption that coroutines do	553	* on the (sometimes correct) assumption that coroutines do
437	* not usually need a lot of stackspace.	554	* not usually need a lot of stackspace.
438	*/	555	*/
439	#if PREFER_PERL_FUNCTIONS	556	#if CORO_PREFER_PERL_FUNCTIONS
440	# define coro_init_stacks init_stacks	557	# define coro_init_stacks init_stacks
441	#else	558	#else
442	static void	559	static void
443	coro_init_stacks ()	560	coro_init_stacks (pTHX)
444	{	561	{
445	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	562	PL_curstackinfo = new_stackinfo(32, 8);
446	PL_curstackinfo->si_type = PERLSI_MAIN;	563	PL_curstackinfo->si_type = PERLSI_MAIN;
447	PL_curstack = PL_curstackinfo->si_stack;	564	PL_curstack = PL_curstackinfo->si_stack;
448	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	565	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449		566
450	PL_stack_base = AvARRAY(PL_curstack);	567	PL_stack_base = AvARRAY(PL_curstack);
451	PL_stack_sp = PL_stack_base;	568	PL_stack_sp = PL_stack_base;
452	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	569	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453		570
454	New(50,PL_tmps_stack,128,SV*);	571	New(50,PL_tmps_stack,32,SV*);
455	PL_tmps_floor = -1;	572	PL_tmps_floor = -1;
456	PL_tmps_ix = -1;	573	PL_tmps_ix = -1;
457	PL_tmps_max = 128;	574	PL_tmps_max = 32;
458		575
459	New(54,PL_markstack,32,I32);	576	New(54,PL_markstack,16,I32);
460	PL_markstack_ptr = PL_markstack;	577	PL_markstack_ptr = PL_markstack;
461	PL_markstack_max = PL_markstack + 32;	578	PL_markstack_max = PL_markstack + 16;
462		579
463	#ifdef SET_MARK_OFFSET	580	#ifdef SET_MARK_OFFSET
464	SET_MARK_OFFSET;	581	SET_MARK_OFFSET;
465	#endif	582	#endif
466		583
467	New(54,PL_scopestack,32,I32);	584	New(54,PL_scopestack,8,I32);
468	PL_scopestack_ix = 0;	585	PL_scopestack_ix = 0;
469	PL_scopestack_max = 32;	586	PL_scopestack_max = 8;
470		587
471	New(54,PL_savestack,64,ANY);	588	New(54,PL_savestack,24,ANY);
472	PL_savestack_ix = 0;	589	PL_savestack_ix = 0;
473	PL_savestack_max = 64;	590	PL_savestack_max = 24;
474		591
475	#if !PERL_VERSION_ATLEAST (5,9,0)	592	#if !PERL_VERSION_ATLEAST (5,9,0)
476	New(54,PL_retstack,16,OP*);	593	New(54,PL_retstack,4,OP*);
477	PL_retstack_ix = 0;	594	PL_retstack_ix = 0;
478	PL_retstack_max = 16;	595	PL_retstack_max = 4;
479	#endif	596	#endif
480	}	597	}
481	#endif	598	#endif
482		599
483	/*	600	/*
484	* destroy the stacks, the callchain etc...	601	* destroy the stacks, the callchain etc...
485	*/	602	*/
486	static void	603	static void
487	coro_destroy_stacks ()	604	coro_destroy_stacks (pTHX)
488	{	605	{
489	if (!IN_DESTRUCT)
490	{
491	/* restore all saved variables and stuff */
492	LEAVE_SCOPE (0);
493	assert (PL_tmps_floor == -1);
494
495	/* free all temporaries */
496	FREETMPS;
497	assert (PL_tmps_ix == -1);
498
499	/* unwind all extra stacks */
500	POPSTACK_TO (PL_mainstack);
501
502	/* unwind main stack */
503	dounwind (-1);
504	}
505
506	while (PL_curstackinfo->si_next)	606	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;	607	PL_curstackinfo = PL_curstackinfo->si_next;
508		608
509	while (PL_curstackinfo)	609	while (PL_curstackinfo)
510	{	610	{
…		…
525	#if !PERL_VERSION_ATLEAST (5,9,0)	625	#if !PERL_VERSION_ATLEAST (5,9,0)
526	Safefree (PL_retstack);	626	Safefree (PL_retstack);
527	#endif	627	#endif
528	}	628	}
529		629
		630	static size_t
		631	coro_rss (pTHX_ struct coro *coro)
		632	{
		633	size_t rss = sizeof (*coro);
		634
		635	if (coro->mainstack)
		636	{
		637	perl_slots tmp_slot;
		638	perl_slots *slot;
		639
		640	if (coro->flags & CF_RUNNING)
		641	{
		642	slot = &tmp_slot;
		643
		644	#define VAR(name,type) slot->name = PL_ ## name;
		645	# include "state.h"
		646	#undef VAR
		647	}
		648	else
		649	slot = coro->slot;
		650
		651	rss += sizeof (slot->curstackinfo);
		652	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		653	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		654	rss += slot->tmps_max * sizeof (SV *);
		655	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		656	rss += slot->scopestack_max * sizeof (I32);
		657	rss += slot->savestack_max * sizeof (ANY);
		658
		659	#if !PERL_VERSION_ATLEAST (5,9,0)
		660	rss += slot->retstack_max * sizeof (OP *);
		661	#endif
		662	}
		663
		664	return rss;
		665	}
		666
530	/** coroutine stack handling ************************************************/	667	/** coroutine stack handling ************************************************/
531		668
		669	#if 0
		670	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		671
		672	/*
		673	* This overrides the default magic get method of %SIG elements.
		674	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		675	* and instead of tryign to save and restore the hash elements, we just provide
		676	* readback here.
		677	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		678	* not expecting this to actually change the hook. This is a potential problem
		679	* when a schedule happens then, but we ignore this.
		680	*/
532	static void	681	static int
533	setup_coro (struct coro *coro)	682	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		683	{
		684	return orig_sigelem_get (aTHX_ sv, mg);
		685	const char *s = MgPV_nolen_const (mg);
		686
		687	if (*s == '_')
		688	{
		689	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		690	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		691	}
		692
		693	return orig_sigelem_get (aTHX_ sv, mg);
		694	}
		695	#endif
		696
		697	static void
		698	coro_setup (pTHX_ struct coro *coro)
534	{	699	{
535	/*	700	/*
536	* emulate part of the perl startup here.	701	* emulate part of the perl startup here.
537	*/	702	*/
538
539	coro_init_stacks ();	703	coro_init_stacks (aTHX);
540		704
		705	PL_runops = RUNOPS_DEFAULT;
541	PL_curcop = &PL_compiling;	706	PL_curcop = &PL_compiling;
542	PL_in_eval = EVAL_NULL;	707	PL_in_eval = EVAL_NULL;
		708	PL_comppad = 0;
543	PL_curpm = 0;	709	PL_curpm = 0;
		710	PL_curpad = 0;
544	PL_localizing = 0;	711	PL_localizing = 0;
545	PL_dirty = 0;	712	PL_dirty = 0;
546	PL_restartop = 0;	713	PL_restartop = 0;
547		714
		715	/* recreate the die/warn hooks */
		716	PL_diehook = 0;
		717	hv_store (hv_sig, "__DIE__", sizeof ("__DIE__") - 1, newSV (0), 0);
		718	PL_diehook = SvREFCNT_inc (rv_diehook);
		719
		720	PL_warnhook = 0;
		721	hv_store (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, newSV (0), 0);
		722	PL_warnhook = SvREFCNT_inc (rv_warnhook);
		723
		724	GvSV (PL_defgv) = newSV (0);
		725	GvAV (PL_defgv) = coro->args; coro->args = 0;
		726	GvSV (PL_errgv) = newSV (0);
		727	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		728	PL_rs = newSVsv (GvSV (irsgv));
		729	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		730
548	{	731	{
549	dSP;	732	dSP;
550	LOGOP myop;	733	LOGOP myop;
551		734
552	SvREFCNT_dec (GvAV (PL_defgv));
553	GvAV (PL_defgv) = coro->args; coro->args = 0;
554
555	Zero (&myop, 1, LOGOP);	735	Zero (&myop, 1, LOGOP);
556	myop.op_next = Nullop;	736	myop.op_next = Nullop;
557	myop.op_flags = OPf_WANT_VOID;	737	myop.op_flags = OPf_WANT_VOID;
558		738
559	PUSHMARK (SP);	739	PUSHMARK (SP);
560	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	740	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
561	PUTBACK;	741	PUTBACK;
562	PL_op = (OP *)&myop;	742	PL_op = (OP *)&myop;
563	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	743	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
564	SPAGAIN;	744	SPAGAIN;
565	}	745	}
566		746
567	ENTER; /* necessary e.g. for dounwind */	747	/* this newly created coroutine might be run on an existing cctx which most
		748	* likely was suspended in set_stacklevel, called from entersub.
		749	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		750	* so we ENTER here for symmetry
		751	*/
		752	ENTER;
568	}	753	}
569		754
570	static void	755	static void
		756	coro_destroy (pTHX_ struct coro *coro)
		757	{
		758	if (!IN_DESTRUCT)
		759	{
		760	/* restore all saved variables and stuff */
		761	LEAVE_SCOPE (0);
		762	assert (PL_tmps_floor == -1);
		763
		764	/* free all temporaries */
		765	FREETMPS;
		766	assert (PL_tmps_ix == -1);
		767
		768	/* unwind all extra stacks */
		769	POPSTACK_TO (PL_mainstack);
		770
		771	/* unwind main stack */
		772	dounwind (-1);
		773	}
		774
		775	SvREFCNT_dec (GvSV (PL_defgv));
		776	SvREFCNT_dec (GvAV (PL_defgv));
		777	SvREFCNT_dec (GvSV (PL_errgv));
		778	SvREFCNT_dec (PL_defoutgv);
		779	SvREFCNT_dec (PL_rs);
		780	SvREFCNT_dec (GvSV (irsgv));
		781
		782	SvREFCNT_dec (PL_diehook);
		783	SvREFCNT_dec (PL_warnhook);
		784
		785	SvREFCNT_dec (coro->saved_deffh);
		786	SvREFCNT_dec (coro->throw);
		787
		788	coro_destroy_stacks (aTHX);
		789	}
		790
		791	static void
571	free_coro_mortal ()	792	free_coro_mortal (pTHX)
572	{	793	{
573	if (coro_mortal)	794	if (expect_true (coro_mortal))
574	{	795	{
575	SvREFCNT_dec (coro_mortal);	796	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;	797	coro_mortal = 0;
577	}	798	}
578	}	799	}
579		800
		801	static int
		802	runops_trace (pTHX)
		803	{
		804	COP *oldcop = 0;
		805	int oldcxix = -2;
		806	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		807	coro_cctx *cctx = coro->cctx;
		808
		809	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		810	{
		811	PERL_ASYNC_CHECK ();
		812
		813	if (cctx->flags & CC_TRACE_ALL)
		814	{
		815	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		816	{
		817	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		818	SV **bot, **top;
		819	AV *av = newAV (); /* return values */
		820	SV **cb;
		821	dSP;
		822
		823	GV *gv = CvGV (cx->blk_sub.cv);
		824	SV *fullname = sv_2mortal (newSV (0));
		825	if (isGV (gv))
		826	gv_efullname3 (fullname, gv, 0);
		827
		828	bot = PL_stack_base + cx->blk_oldsp + 1;
		829	top = cx->blk_gimme == G_ARRAY ? SP + 1
		830	: cx->blk_gimme == G_SCALAR ? bot + 1
		831	: bot;
		832
		833	av_extend (av, top - bot);
		834	while (bot < top)
		835	av_push (av, SvREFCNT_inc (*bot++));
		836
		837	PL_runops = RUNOPS_DEFAULT;
		838	ENTER;
		839	SAVETMPS;
		840	EXTEND (SP, 3);
		841	PUSHMARK (SP);
		842	PUSHs (&PL_sv_no);
		843	PUSHs (fullname);
		844	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		845	PUTBACK;
		846	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		847	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		848	SPAGAIN;
		849	FREETMPS;
		850	LEAVE;
		851	PL_runops = runops_trace;
		852	}
		853
		854	if (oldcop != PL_curcop)
		855	{
		856	oldcop = PL_curcop;
		857
		858	if (PL_curcop != &PL_compiling)
		859	{
		860	SV **cb;
		861
		862	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		863	{
		864	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		865
		866	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		867	{
		868	runops_proc_t old_runops = PL_runops;
		869	dSP;
		870	GV *gv = CvGV (cx->blk_sub.cv);
		871	SV *fullname = sv_2mortal (newSV (0));
		872
		873	if (isGV (gv))
		874	gv_efullname3 (fullname, gv, 0);
		875
		876	PL_runops = RUNOPS_DEFAULT;
		877	ENTER;
		878	SAVETMPS;
		879	EXTEND (SP, 3);
		880	PUSHMARK (SP);
		881	PUSHs (&PL_sv_yes);
		882	PUSHs (fullname);
		883	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		884	PUTBACK;
		885	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		886	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		887	SPAGAIN;
		888	FREETMPS;
		889	LEAVE;
		890	PL_runops = runops_trace;
		891	}
		892
		893	oldcxix = cxstack_ix;
		894	}
		895
		896	if (cctx->flags & CC_TRACE_LINE)
		897	{
		898	dSP;
		899
		900	PL_runops = RUNOPS_DEFAULT;
		901	ENTER;
		902	SAVETMPS;
		903	EXTEND (SP, 3);
		904	PL_runops = RUNOPS_DEFAULT;
		905	PUSHMARK (SP);
		906	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		907	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		908	PUTBACK;
		909	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		910	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		911	SPAGAIN;
		912	FREETMPS;
		913	LEAVE;
		914	PL_runops = runops_trace;
		915	}
		916	}
		917	}
		918	}
		919	}
		920
		921	TAINT_NOT;
		922	return 0;
		923	}
		924
580	/* inject a fake call to Coro::State::_cctx_init into the execution */	925	/* inject a fake call to Coro::State::_cctx_init into the execution */
		926	/* _cctx_init should be careful, as it could be called at almost any time */
		927	/* during execution of a perl program */
581	static void NOINLINE	928	static void NOINLINE
582	prepare_cctx (coro_cctx *cctx)	929	cctx_prepare (pTHX_ coro_cctx *cctx)
583	{	930	{
584	dSP;	931	dSP;
585	LOGOP myop;	932	LOGOP myop;
		933
		934	PL_top_env = &PL_start_env;
		935
		936	if (cctx->flags & CC_TRACE)
		937	PL_runops = runops_trace;
586		938
587	Zero (&myop, 1, LOGOP);	939	Zero (&myop, 1, LOGOP);
588	myop.op_next = PL_op;	940	myop.op_next = PL_op;
589	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	941	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
590		942
…		…
596	PL_op = (OP *)&myop;	948	PL_op = (OP *)&myop;
597	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	949	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
598	SPAGAIN;	950	SPAGAIN;
599	}	951	}
600		952
		953	/*
		954	* this is a _very_ stripped down perl interpreter ;)
		955	*/
601	static void	956	static void
602	coro_run (void *arg)	957	cctx_run (void *arg)
603	{	958	{
		959	dTHX;
		960
604	/* coro_run is the alternative tail of transfer(), so unlock here. */	961	/* cctx_run is the alternative tail of transfer(), so unlock here. */
605	UNLOCK;	962	UNLOCK;
606		963
607	/*	964	/* we now skip the entersub that lead to transfer() */
608	* this is a _very_ stripped down perl interpreter ;)	965	PL_op = PL_op->op_next;
609	*/
610	PL_top_env = &PL_start_env;
611		966
612	/* inject call to cctx_init */	967	/* inject a fake subroutine call to cctx_init */
613	prepare_cctx ((coro_cctx *)arg);	968	cctx_prepare (aTHX_ (coro_cctx *)arg);
614		969
615	/* somebody will hit me for both perl_run and PL_restartop */	970	/* somebody or something will hit me for both perl_run and PL_restartop */
616	PL_restartop = PL_op;	971	PL_restartop = PL_op;
617	perl_run (PL_curinterp);	972	perl_run (PL_curinterp);
618		973
619	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	974	/*
620	abort ();	975	* If perl-run returns we assume exit() was being called or the coro
		976	* fell off the end, which seems to be the only valid (non-bug)
		977	* reason for perl_run to return. We try to exit by jumping to the
		978	* bootstrap-time "top" top_env, as we cannot restore the "main"
		979	* coroutine as Coro has no such concept
		980	*/
		981	PL_top_env = main_top_env;
		982	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
621	}	983	}
622		984
623	static coro_cctx *	985	static coro_cctx *
624	cctx_new ()	986	cctx_new ()
625	{	987	{
626	coro_cctx *cctx;	988	coro_cctx *cctx;
		989	void *stack_start;
		990	size_t stack_size;
627		991
628	++cctx_count;	992	++cctx_count;
629		993
630	Newz (0, cctx, 1, coro_cctx);	994	Newz (0, cctx, 1, coro_cctx);
631		995
632	#if HAVE_MMAP	996	#if HAVE_MMAP
633
634	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	997	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
635	/* mmap supposedly does allocate-on-write for us */	998	/* mmap supposedly does allocate-on-write for us */
636	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	999	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
637		1000
638	if (cctx->sptr != (void *)-1)	1001	if (cctx->sptr != (void *)-1)
639	{	1002	{
640	# if STACKGUARD	1003	# if CORO_STACKGUARD
641	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1004	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
642	# endif	1005	# endif
643	REGISTER_STACK (
644	cctx,
645	STACKGUARD * PAGESIZE + (char *)cctx->sptr,	1006	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
646	cctx->ssize + (char *)cctx->sptr	1007	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
647	);	1008	cctx->flags |= CC_MAPPED;
648
649	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
650	}	1009	}
651	else	1010	else
652	#endif	1011	#endif
653	{	1012	{
654	cctx->ssize = -STACKSIZE * (long)sizeof (long);	1013	cctx->ssize = coro_stacksize * (long)sizeof (long);
655	New (0, cctx->sptr, STACKSIZE, long);	1014	New (0, cctx->sptr, coro_stacksize, long);
656		1015
657	if (!cctx->sptr)	1016	if (!cctx->sptr)
658	{	1017	{
659	perror ("FATAL: unable to allocate stack for coroutine");	1018	perror ("FATAL: unable to allocate stack for coroutine");
660	_exit (EXIT_FAILURE);	1019	_exit (EXIT_FAILURE);
661	}	1020	}
662		1021
663	REGISTER_STACK (	1022	stack_start = cctx->sptr;
664	cctx,	1023	stack_size = cctx->ssize;
665	(char *)cctx->sptr,
666	(char *)cctx->sptr - cctx->ssize
667	);
668
669	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, -cctx->ssize);
670	}	1024	}
		1025
		1026	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		1027	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
671		1028
672	return cctx;	1029	return cctx;
673	}	1030	}
674		1031
675	static void	1032	static void
…		…
678	if (!cctx)	1035	if (!cctx)
679	return;	1036	return;
680		1037
681	--cctx_count;	1038	--cctx_count;
682		1039
683	#if USE_VALGRIND	1040	#if CORO_USE_VALGRIND
684	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1041	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
685	#endif	1042	#endif
686		1043
687	#if HAVE_MMAP	1044	#if HAVE_MMAP
688	if (cctx->ssize > 0)	1045	if (cctx->flags & CC_MAPPED)
689	munmap (cctx->sptr, cctx->ssize);	1046	munmap (cctx->sptr, cctx->ssize);
690	else	1047	else
691	#endif	1048	#endif
692	Safefree (cctx->sptr);	1049	Safefree (cctx->sptr);
693		1050
694	Safefree (cctx);	1051	Safefree (cctx);
695	}	1052	}
696		1053
		1054	/* wether this cctx should be destructed */
		1055	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1056
697	static coro_cctx *	1057	static coro_cctx *
698	cctx_get ()	1058	cctx_get (pTHX)
699	{	1059	{
700	coro_cctx *cctx;	1060	while (expect_true (cctx_first))
701
702	if (cctx_first)
703	{	1061	{
704	cctx = cctx_first;	1062	coro_cctx *cctx = cctx_first;
705	cctx_first = cctx->next;	1063	cctx_first = cctx->next;
706	--cctx_idle;	1064	--cctx_idle;
707	}	1065
708	else	1066	if (expect_true (!CCTX_EXPIRED (cctx)))
709	{	1067	return cctx;
710	cctx = cctx_new ();	1068
711	PL_op = PL_op->op_next;	1069	cctx_destroy (cctx);
712	}	1070	}
713		1071
714	return cctx;	1072	return cctx_new ();
715	}	1073	}
716		1074
717	static void	1075	static void
718	cctx_put (coro_cctx *cctx)	1076	cctx_put (coro_cctx *cctx)
719	{	1077	{
720	/* free another cctx if overlimit */	1078	/* free another cctx if overlimit */
721	if (cctx_idle >= MAX_IDLE_CCTX)	1079	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
722	{	1080	{
723	coro_cctx *first = cctx_first;	1081	coro_cctx *first = cctx_first;
724	cctx_first = first->next;	1082	cctx_first = first->next;
725	--cctx_idle;	1083	--cctx_idle;
726		1084
727	assert (!first->inuse);
728	cctx_destroy (first);	1085	cctx_destroy (first);
729	}	1086	}
730		1087
731	++cctx_idle;	1088	++cctx_idle;
732	cctx->next = cctx_first;	1089	cctx->next = cctx_first;
733	cctx_first = cctx;	1090	cctx_first = cctx;
734	}	1091	}
735		1092
736	/** coroutine switching *****************************************************/	1093	/** coroutine switching *****************************************************/
737		1094
738	/* never call directly, always through the coro_state_transfer global variable */	1095	static void
		1096	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1097	{
		1098	if (expect_true (prev != next))
		1099	{
		1100	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1101	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1102
		1103	if (expect_false (next->flags & CF_RUNNING))
		1104	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1105
		1106	if (expect_false (next->flags & CF_DESTROYED))
		1107	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1108
		1109	if (
		1110	#if PERL_VERSION_ATLEAST (5,9,0)
		1111	expect_false (PL_parser)
		1112	#else
		1113	expect_false (PL_lex_state != LEX_NOTPARSING)
		1114	#endif
		1115	)
		1116	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1117	}
		1118	}
		1119
		1120	/* always use the TRANSFER macro */
739	static void NOINLINE	1121	static void NOINLINE
740	transfer (struct coro *prev, struct coro *next)	1122	transfer (pTHX_ struct coro *prev, struct coro *next)
741	{	1123	{
742	dSTACKLEVEL;	1124	dSTACKLEVEL;
743		1125
744	/* sometimes transfer is only called to set idle_sp */	1126	/* sometimes transfer is only called to set idle_sp */
745	if (!next)	1127	if (expect_false (!next))
746	{	1128	{
747	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1129	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
748	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1130	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
749	}	1131	}
750	else if (prev != next)	1132	else if (expect_true (prev != next))
751	{	1133	{
752	coro_cctx *prev__cctx;	1134	coro_cctx *prev__cctx;
753		1135
754	if (prev->flags & CF_NEW)	1136	if (expect_false (prev->flags & CF_NEW))
755	{	1137	{
756	/* create a new empty context */	1138	/* create a new empty context */
757	Newz (0, prev->cctx, 1, coro_cctx);	1139	Newz (0, prev->cctx, 1, coro_cctx);
758	prev->cctx->inuse = 1;
759	prev->flags &= ~CF_NEW;	1140	prev->flags &= ~CF_NEW;
760	prev->flags |= CF_RUNNING;	1141	prev->flags |= CF_RUNNING;
761	}	1142	}
762		1143
763	/*TODO: must not croak here */
764	if (!prev->flags & CF_RUNNING)
765	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
766
767	if (next->flags & CF_RUNNING)
768	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
769
770	if (next->flags & CF_DESTROYED)
771	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
772
773	prev->flags &= ~CF_RUNNING;	1144	prev->flags &= ~CF_RUNNING;
774	next->flags |= CF_RUNNING;	1145	next->flags |= CF_RUNNING;
775		1146
776	LOCK;	1147	LOCK;
777		1148
		1149	/* first get rid of the old state */
		1150	save_perl (aTHX_ prev);
		1151
778	if (next->flags & CF_NEW)	1152	if (expect_false (next->flags & CF_NEW))
779	{	1153	{
780	/* need to start coroutine */	1154	/* need to start coroutine */
781	next->flags &= ~CF_NEW;	1155	next->flags &= ~CF_NEW;
782	/* first get rid of the old state */
783	save_perl (prev);
784	/* setup coroutine call */	1156	/* setup coroutine call */
785	setup_coro (next);	1157	coro_setup (aTHX_ next);
786	/* need a new stack */
787	assert (!next->cctx);
788	}	1158	}
789	else	1159	else
790	{
791	/* coroutine already started */
792	save_perl (prev);
793	load_perl (next);	1160	load_perl (aTHX_ next);
794	}
795		1161
796	prev__cctx = prev->cctx;	1162	prev__cctx = prev->cctx;
797		1163
798	/* possibly "free" the cctx */	1164	/* possibly "free" the cctx */
799	if (prev__cctx->idle_sp == STACKLEVEL)	1165	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
800	{	1166	{
801	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1167	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
802	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1168	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
803		1169
804	prev->cctx = 0;	1170	prev->cctx = 0;
805		1171
		1172	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1173	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1174	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1175	if (!next->cctx)
		1176	next->cctx = cctx_get (aTHX);
		1177
806	cctx_put (prev__cctx);	1178	cctx_put (prev__cctx);
807	prev__cctx->inuse = 0;
808	}	1179	}
809		1180
		1181	++next->usecount;
		1182
810	if (!next->cctx)	1183	if (expect_true (!next->cctx))
811	{
812	next->cctx = cctx_get ();	1184	next->cctx = cctx_get (aTHX);
813	assert (!next->cctx->inuse);
814	next->cctx->inuse = 1;
815	}
816		1185
817	if (prev__cctx != next->cctx)	1186	if (expect_false (prev__cctx != next->cctx))
818	{	1187	{
819	prev__cctx->top_env = PL_top_env;	1188	prev__cctx->top_env = PL_top_env;
820	PL_top_env = next->cctx->top_env;	1189	PL_top_env = next->cctx->top_env;
821	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1190	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
822	}	1191	}
823		1192
824	free_coro_mortal ();	1193	free_coro_mortal (aTHX);
825	UNLOCK;	1194	UNLOCK;
		1195
		1196	if (expect_false (prev->throw || next->throw))
		1197	{
		1198	struct coro *coro = SvSTATE (coro_current);
		1199
		1200	if (coro->throw)
		1201	{
		1202	SV *exception = coro->throw;
		1203	coro->throw = 0;
		1204	sv_setsv (ERRSV, exception);
		1205	croak (0);
		1206	}
		1207	}
826	}	1208	}
827	}	1209	}
828		1210
829	struct transfer_args	1211	struct transfer_args
830	{	1212	{
831	struct coro *prev, *next;	1213	struct coro *prev, *next;
832	};	1214	};
833		1215
834	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1216	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1217	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
835		1218
836	/** high level stuff ********************************************************/	1219	/** high level stuff ********************************************************/
837		1220
838	static int	1221	static int
839	coro_state_destroy (struct coro *coro)	1222	coro_state_destroy (pTHX_ struct coro *coro)
840	{	1223	{
841	if (coro->flags & CF_DESTROYED)	1224	if (coro->flags & CF_DESTROYED)
842	return 0;	1225	return 0;
843		1226
844	coro->flags |= CF_DESTROYED;	1227	coro->flags |= CF_DESTROYED;
…		…
856		1239
857	if (coro->mainstack && coro->mainstack != main_mainstack)	1240	if (coro->mainstack && coro->mainstack != main_mainstack)
858	{	1241	{
859	struct coro temp;	1242	struct coro temp;
860		1243
861	assert (!(coro->flags & CF_RUNNING));
862
863	Zero (&temp, 1, struct coro);
864	temp.save = CORO_SAVE_ALL;
865
866	if (coro->flags & CF_RUNNING)	1244	if (coro->flags & CF_RUNNING)
867	croak ("FATAL: tried to destroy currently running coroutine");	1245	croak ("FATAL: tried to destroy currently running coroutine");
868		1246
869	save_perl (&temp);	1247	save_perl (aTHX_ &temp);
870	load_perl (coro);	1248	load_perl (aTHX_ coro);
871		1249
872	coro_destroy_stacks ();	1250	coro_destroy (aTHX_ coro);
873		1251
874	load_perl (&temp); /* this will get rid of defsv etc.. */	1252	load_perl (aTHX_ &temp);
875		1253
876	coro->mainstack = 0;	1254	coro->slot = 0;
877	}	1255	}
878		1256
879	cctx_destroy (coro->cctx);	1257	cctx_destroy (coro->cctx);
880	SvREFCNT_dec (coro->args);	1258	SvREFCNT_dec (coro->args);
881		1259
		1260	if (coro->next) coro->next->prev = coro->prev;
		1261	if (coro->prev) coro->prev->next = coro->next;
		1262	if (coro == coro_first) coro_first = coro->next;
		1263
882	return 1;	1264	return 1;
883	}	1265	}
884		1266
885	static int	1267	static int
886	coro_state_free (pTHX_ SV *sv, MAGIC *mg)	1268	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
887	{	1269	{
888	struct coro *coro = (struct coro *)mg->mg_ptr;	1270	struct coro *coro = (struct coro *)mg->mg_ptr;
889	mg->mg_ptr = 0;	1271	mg->mg_ptr = 0;
890		1272
		1273	coro->hv = 0;
		1274
891	if (--coro->refcnt < 0)	1275	if (--coro->refcnt < 0)
892	{	1276	{
893	coro_state_destroy (coro);	1277	coro_state_destroy (aTHX_ coro);
894	Safefree (coro);	1278	Safefree (coro);
895	}	1279	}
896		1280
897	return 0;	1281	return 0;
898	}	1282	}
…		…
916	#else	1300	#else
917	# define MGf_DUP 0	1301	# define MGf_DUP 0
918	#endif	1302	#endif
919	};	1303	};
920		1304
921	static struct coro *
922	SvSTATE (SV *coro)
923	{
924	HV *stash;
925	MAGIC *mg;
926
927	if (SvROK (coro))
928	coro = SvRV (coro);
929
930	stash = SvSTASH (coro);
931	if (stash != coro_stash && stash != coro_state_stash)
932	{
933	/* very slow, but rare, check */
934	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
935	croak ("Coro::State object required");
936	}
937
938	mg = SvMAGIC (coro);
939	assert (mg->mg_type == PERL_MAGIC_ext);
940	return (struct coro *)mg->mg_ptr;
941	}
942
943	static void	1305	static void
944	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1306	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
945	{	1307	{
946	ta->prev = SvSTATE (prev_sv);	1308	ta->prev = SvSTATE (prev_sv);
947	ta->next = SvSTATE (next_sv);	1309	ta->next = SvSTATE (next_sv);
		1310	TRANSFER_CHECK (*ta);
948	}	1311	}
949		1312
950	static void	1313	static void
951	api_transfer (SV *prev_sv, SV *next_sv)	1314	api_transfer (SV *prev_sv, SV *next_sv)
952	{	1315	{
		1316	dTHX;
953	struct transfer_args ta;	1317	struct transfer_args ta;
954		1318
955	prepare_transfer (&ta, prev_sv, next_sv);	1319	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
956	TRANSFER (ta);	1320	TRANSFER (ta);
957	}	1321	}
958		1322
959	static int
960	api_save (SV *coro_sv, int new_save)
961	{
962	struct coro *coro = SvSTATE (coro_sv);
963	int old_save = coro->save;
964
965	if (new_save >= 0)
966	coro->save = new_save;
967
968	return old_save;
969	}
970
971	/** Coro ********************************************************************/	1323	/** Coro ********************************************************************/
972		1324
973	static void	1325	static void
974	coro_enq (SV *coro_sv)	1326	coro_enq (pTHX_ SV *coro_sv)
975	{	1327	{
976	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1328	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
977	}	1329	}
978		1330
979	static SV *	1331	static SV *
980	coro_deq (int min_prio)	1332	coro_deq (pTHX_ int min_prio)
981	{	1333	{
982	int prio = PRIO_MAX - PRIO_MIN;	1334	int prio = PRIO_MAX - PRIO_MIN;
983		1335
984	min_prio -= PRIO_MIN;	1336	min_prio -= PRIO_MIN;
985	if (min_prio < 0)	1337	if (min_prio < 0)
…		…
993	}	1345	}
994		1346
995	static int	1347	static int
996	api_ready (SV *coro_sv)	1348	api_ready (SV *coro_sv)
997	{	1349	{
		1350	dTHX;
998	struct coro *coro;	1351	struct coro *coro;
999		1352
1000	if (SvROK (coro_sv))	1353	if (SvROK (coro_sv))
1001	coro_sv = SvRV (coro_sv);	1354	coro_sv = SvRV (coro_sv);
1002		1355
…		…
1006	return 0;	1359	return 0;
1007		1360
1008	coro->flags |= CF_READY;	1361	coro->flags |= CF_READY;
1009		1362
1010	LOCK;	1363	LOCK;
1011	coro_enq (SvREFCNT_inc (coro_sv));	1364	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1012	++coro_nready;	1365	++coro_nready;
1013	UNLOCK;	1366	UNLOCK;
1014		1367
1015	return 1;	1368	return 1;
1016	}	1369	}
1017		1370
1018	static int	1371	static int
1019	api_is_ready (SV *coro_sv)	1372	api_is_ready (SV *coro_sv)
1020	{	1373	{
		1374	dTHX;
1021	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1375	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1022	}	1376	}
1023		1377
1024	static void	1378	static void
1025	prepare_schedule (struct transfer_args *ta)	1379	prepare_schedule (pTHX_ struct transfer_args *ta)
1026	{	1380	{
1027	SV *prev_sv, *next_sv;	1381	SV *prev_sv, *next_sv;
1028		1382
1029	for (;;)	1383	for (;;)
1030	{	1384	{
1031	LOCK;	1385	LOCK;
1032	next_sv = coro_deq (PRIO_MIN);	1386	next_sv = coro_deq (aTHX_ PRIO_MIN);
1033		1387
1034	/* nothing to schedule: call the idle handler */	1388	/* nothing to schedule: call the idle handler */
1035	if (!next_sv)	1389	if (expect_false (!next_sv))
1036	{	1390	{
1037	dSP;	1391	dSP;
1038	UNLOCK;	1392	UNLOCK;
1039		1393
1040	ENTER;	1394	ENTER;
…		…
1050	}	1404	}
1051		1405
1052	ta->next = SvSTATE (next_sv);	1406	ta->next = SvSTATE (next_sv);
1053		1407
1054	/* cannot transfer to destroyed coros, skip and look for next */	1408	/* cannot transfer to destroyed coros, skip and look for next */
1055	if (ta->next->flags & CF_DESTROYED)	1409	if (expect_false (ta->next->flags & CF_DESTROYED))
1056	{	1410	{
1057	UNLOCK;	1411	UNLOCK;
1058	SvREFCNT_dec (next_sv);	1412	SvREFCNT_dec (next_sv);
1059	/* coro_nready is already taken care of by destroy */	1413	/* coro_nready is already taken care of by destroy */
1060	continue;	1414	continue;
…		…
1065	break;	1419	break;
1066	}	1420	}
1067		1421
1068	/* free this only after the transfer */	1422	/* free this only after the transfer */
1069	prev_sv = SvRV (coro_current);	1423	prev_sv = SvRV (coro_current);
1070	SvRV_set (coro_current, next_sv);
1071	ta->prev = SvSTATE (prev_sv);	1424	ta->prev = SvSTATE (prev_sv);
1072		1425	TRANSFER_CHECK (*ta);
1073	assert (ta->next->flags & CF_READY);	1426	assert (ta->next->flags & CF_READY);
1074	ta->next->flags &= ~CF_READY;	1427	ta->next->flags &= ~CF_READY;
		1428	SvRV_set (coro_current, next_sv);
1075		1429
1076	LOCK;	1430	LOCK;
1077	free_coro_mortal ();	1431	free_coro_mortal (aTHX);
1078	coro_mortal = prev_sv;	1432	coro_mortal = prev_sv;
1079	UNLOCK;	1433	UNLOCK;
1080	}	1434	}
1081		1435
1082	static void	1436	static void
1083	prepare_cede (struct transfer_args *ta)	1437	prepare_cede (pTHX_ struct transfer_args *ta)
1084	{	1438	{
1085	api_ready (coro_current);	1439	api_ready (coro_current);
1086	prepare_schedule (ta);	1440	prepare_schedule (aTHX_ ta);
1087	}	1441	}
1088		1442
1089	static int	1443	static int
1090	prepare_cede_notself (struct transfer_args *ta)	1444	prepare_cede_notself (pTHX_ struct transfer_args *ta)
1091	{	1445	{
1092	if (coro_nready)	1446	if (coro_nready)
1093	{	1447	{
1094	SV *prev = SvRV (coro_current);	1448	SV *prev = SvRV (coro_current);
1095	prepare_schedule (ta);	1449	prepare_schedule (aTHX_ ta);
1096	api_ready (prev);	1450	api_ready (prev);
1097	return 1;	1451	return 1;
1098	}	1452	}
1099	else	1453	else
1100	return 0;	1454	return 0;
1101	}	1455	}
1102		1456
1103	static void	1457	static void
1104	api_schedule (void)	1458	api_schedule (void)
1105	{	1459	{
		1460	dTHX;
1106	struct transfer_args ta;	1461	struct transfer_args ta;
1107		1462
1108	prepare_schedule (&ta);	1463	prepare_schedule (aTHX_ &ta);
1109	TRANSFER (ta);	1464	TRANSFER (ta);
1110	}	1465	}
1111		1466
1112	static int	1467	static int
1113	api_cede (void)	1468	api_cede (void)
1114	{	1469	{
		1470	dTHX;
1115	struct transfer_args ta;	1471	struct transfer_args ta;
1116		1472
1117	prepare_cede (&ta);	1473	prepare_cede (aTHX_ &ta);
1118		1474
1119	if (ta.prev != ta.next)	1475	if (expect_true (ta.prev != ta.next))
1120	{	1476	{
1121	TRANSFER (ta);	1477	TRANSFER (ta);
1122	return 1;	1478	return 1;
1123	}	1479	}
1124	else	1480	else
…		…
1126	}	1482	}
1127		1483
1128	static int	1484	static int
1129	api_cede_notself (void)	1485	api_cede_notself (void)
1130	{	1486	{
		1487	dTHX;
1131	struct transfer_args ta;	1488	struct transfer_args ta;
1132		1489
1133	if (prepare_cede_notself (&ta))	1490	if (prepare_cede_notself (aTHX_ &ta))
1134	{	1491	{
1135	TRANSFER (ta);	1492	TRANSFER (ta);
1136	return 1;	1493	return 1;
1137	}	1494	}
1138	else	1495	else
1139	return 0;	1496	return 0;
1140	}	1497	}
1141		1498
		1499	static void
		1500	api_trace (SV *coro_sv, int flags)
		1501	{
		1502	dTHX;
		1503	struct coro *coro = SvSTATE (coro_sv);
		1504
		1505	if (flags & CC_TRACE)
		1506	{
		1507	if (!coro->cctx)
		1508	coro->cctx = cctx_new ();
		1509	else if (!(coro->cctx->flags & CC_TRACE))
		1510	croak ("cannot enable tracing on coroutine with custom stack");
		1511
		1512	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1513	}
		1514	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1515	{
		1516	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1517
		1518	if (coro->flags & CF_RUNNING)
		1519	PL_runops = RUNOPS_DEFAULT;
		1520	else
		1521	coro->slot->runops = RUNOPS_DEFAULT;
		1522	}
		1523	}
		1524
1142	MODULE = Coro::State PACKAGE = Coro::State	1525	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1143		1526
1144	PROTOTYPES: DISABLE	1527	PROTOTYPES: DISABLE
1145		1528
1146	BOOT:	1529	BOOT:
1147	{	1530	{
1148	#ifdef USE_ITHREADS	1531	#ifdef USE_ITHREADS
1149	MUTEX_INIT (&coro_mutex);	1532	MUTEX_INIT (&coro_mutex);
1150	#endif	1533	#endif
1151	BOOT_PAGESIZE;	1534	BOOT_PAGESIZE;
1152		1535
		1536	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1537	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1538	#if 0
		1539	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1540	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1541	#endif
		1542	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1543	rv_diehook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1544	rv_warnhook = SvREFCNT_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1545
1153	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1546	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1154		1547
		1548	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1549	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1155	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1550	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1156	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1157	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1158	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1159	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1551	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1160		1552
1161	main_mainstack = PL_mainstack;	1553	main_mainstack = PL_mainstack;
		1554	main_top_env = PL_top_env;
		1555
		1556	while (main_top_env->je_prev)
		1557	main_top_env = main_top_env->je_prev;
1162		1558
1163	coroapi.ver = CORO_API_VERSION;	1559	coroapi.ver = CORO_API_VERSION;
		1560	coroapi.rev = CORO_API_REVISION;
1164	coroapi.transfer = api_transfer;	1561	coroapi.transfer = api_transfer;
1165		1562
1166	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1563	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1167	}	1564	}
1168		1565
1169	SV *	1566	SV *
1170	new (char *klass, ...)	1567	new (char *klass, ...)
1171	CODE:	1568	CODE:
1172	{	1569	{
1173	struct coro *coro;	1570	struct coro *coro;
		1571	MAGIC *mg;
1174	HV *hv;	1572	HV *hv;
1175	int i;	1573	int i;
1176		1574
1177	Newz (0, coro, 1, struct coro);	1575	Newz (0, coro, 1, struct coro);
1178	coro->args = newAV ();	1576	coro->args = newAV ();
1179	coro->save = CORO_SAVE_ALL;
1180	coro->flags = CF_NEW;	1577	coro->flags = CF_NEW;
1181		1578
		1579	if (coro_first) coro_first->prev = coro;
		1580	coro->next = coro_first;
		1581	coro_first = coro;
		1582
1182	hv = newHV ();	1583	coro->hv = hv = newHV ();
1183	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1584	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1585	mg->mg_flags |= MGf_DUP;
1184	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1586	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1185		1587
		1588	av_extend (coro->args, items - 1);
1186	for (i = 1; i < items; i++)	1589	for (i = 1; i < items; i++)
1187	av_push (coro->args, newSVsv (ST (i)));	1590	av_push (coro->args, newSVsv (ST (i)));
1188	}	1591	}
1189	OUTPUT:	1592	OUTPUT:
1190	RETVAL	1593	RETVAL
1191		1594
1192	int	1595	# these not obviously related functions are all rolled into the same xs
1193	save (SV *coro, int new_save = -1)	1596	# function to increase chances that they all will call transfer with the same
1194	CODE:	1597	# stack offset
1195	RETVAL = api_save (coro, new_save);
1196	OUTPUT:
1197	RETVAL
1198
1199	void	1598	void
1200	_set_stacklevel (...)	1599	_set_stacklevel (...)
1201	ALIAS:	1600	ALIAS:
1202	Coro::State::transfer = 1	1601	Coro::State::transfer = 1
1203	Coro::schedule = 2	1602	Coro::schedule = 2
…		…
1216		1615
1217	case 1:	1616	case 1:
1218	if (items != 2)	1617	if (items != 2)
1219	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1618	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1220		1619
1221	prepare_transfer (&ta, ST (0), ST (1));	1620	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1222	break;	1621	break;
1223		1622
1224	case 2:	1623	case 2:
1225	prepare_schedule (&ta);	1624	prepare_schedule (aTHX_ &ta);
1226	break;	1625	break;
1227		1626
1228	case 3:	1627	case 3:
1229	prepare_cede (&ta);	1628	prepare_cede (aTHX_ &ta);
1230	break;	1629	break;
1231		1630
1232	case 4:	1631	case 4:
1233	if (!prepare_cede_notself (&ta))	1632	if (!prepare_cede_notself (aTHX_ &ta))
1234	XSRETURN_EMPTY;	1633	XSRETURN_EMPTY;
1235		1634
1236	break;	1635	break;
1237	}	1636	}
1238		1637
1239	BARRIER;	1638	BARRIER;
		1639	PUTBACK;
1240	TRANSFER (ta);	1640	TRANSFER (ta);
1241		1641	SPAGAIN; /* might be the sp of a different coroutine now */
1242	if (GIMME_V != G_VOID && ta.next != ta.prev)	1642	/* be extra careful not to ever do anything after TRANSFER */
1243	XSRETURN_YES;
1244	}	1643	}
1245		1644
1246	bool	1645	bool
1247	_destroy (SV *coro_sv)	1646	_destroy (SV *coro_sv)
1248	CODE:	1647	CODE:
1249	RETVAL = coro_state_destroy (SvSTATE (coro_sv));	1648	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1250	OUTPUT:	1649	OUTPUT:
1251	RETVAL	1650	RETVAL
1252		1651
1253	void	1652	void
1254	_exit (code)	1653	_exit (code)
…		…
1256	PROTOTYPE: $	1655	PROTOTYPE: $
1257	CODE:	1656	CODE:
1258	_exit (code);	1657	_exit (code);
1259		1658
1260	int	1659	int
		1660	cctx_stacksize (int new_stacksize = 0)
		1661	CODE:
		1662	RETVAL = coro_stacksize;
		1663	if (new_stacksize)
		1664	coro_stacksize = new_stacksize;
		1665	OUTPUT:
		1666	RETVAL
		1667
		1668	int
1261	cctx_count ()	1669	cctx_count ()
1262	CODE:	1670	CODE:
1263	RETVAL = cctx_count;	1671	RETVAL = cctx_count;
1264	OUTPUT:	1672	OUTPUT:
1265	RETVAL	1673	RETVAL
…		…
1269	CODE:	1677	CODE:
1270	RETVAL = cctx_idle;	1678	RETVAL = cctx_idle;
1271	OUTPUT:	1679	OUTPUT:
1272	RETVAL	1680	RETVAL
1273		1681
		1682	void
		1683	list ()
		1684	PPCODE:
		1685	{
		1686	struct coro *coro;
		1687	for (coro = coro_first; coro; coro = coro->next)
		1688	if (coro->hv)
		1689	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1690	}
		1691
		1692	void
		1693	call (Coro::State coro, SV *coderef)
		1694	ALIAS:
		1695	eval = 1
		1696	CODE:
		1697	{
		1698	if (coro->mainstack)
		1699	{
		1700	struct coro temp;
		1701
		1702	if (!(coro->flags & CF_RUNNING))
		1703	{
		1704	save_perl (aTHX_ &temp);
		1705	load_perl (aTHX_ coro);
		1706	}
		1707
		1708	{
		1709	dSP;
		1710	ENTER;
		1711	SAVETMPS;
		1712	PUTBACK;
		1713	PUSHSTACK;
		1714	PUSHMARK (SP);
		1715
		1716	if (ix)
		1717	eval_sv (coderef, 0);
		1718	else
		1719	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1720
		1721	POPSTACK;
		1722	SPAGAIN;
		1723	FREETMPS;
		1724	LEAVE;
		1725	PUTBACK;
		1726	}
		1727
		1728	if (!(coro->flags & CF_RUNNING))
		1729	{
		1730	save_perl (aTHX_ coro);
		1731	load_perl (aTHX_ &temp);
		1732	}
		1733	}
		1734	}
		1735
		1736	SV *
		1737	is_ready (Coro::State coro)
		1738	PROTOTYPE: $
		1739	ALIAS:
		1740	is_ready = CF_READY
		1741	is_running = CF_RUNNING
		1742	is_new = CF_NEW
		1743	is_destroyed = CF_DESTROYED
		1744	CODE:
		1745	RETVAL = boolSV (coro->flags & ix);
		1746	OUTPUT:
		1747	RETVAL
		1748
		1749	void
		1750	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1751
		1752	SV *
		1753	has_stack (Coro::State coro)
		1754	PROTOTYPE: $
		1755	CODE:
		1756	RETVAL = boolSV (!!coro->cctx);
		1757	OUTPUT:
		1758	RETVAL
		1759
		1760	int
		1761	is_traced (Coro::State coro)
		1762	PROTOTYPE: $
		1763	CODE:
		1764	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1765	OUTPUT:
		1766	RETVAL
		1767
		1768	IV
		1769	rss (Coro::State coro)
		1770	PROTOTYPE: $
		1771	ALIAS:
		1772	usecount = 1
		1773	CODE:
		1774	switch (ix)
		1775	{
		1776	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1777	case 1: RETVAL = coro->usecount; break;
		1778	}
		1779	OUTPUT:
		1780	RETVAL
		1781
		1782
1274	MODULE = Coro::State PACKAGE = Coro	1783	MODULE = Coro::State PACKAGE = Coro
1275		1784
1276	BOOT:	1785	BOOT:
1277	{	1786	{
1278	int i;	1787	int i;
1279		1788
		1789	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1790	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1791	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1792
		1793	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1794	SvREADONLY_on (coro_current);
		1795
1280	coro_stash = gv_stashpv ("Coro", TRUE);	1796	coro_stash = gv_stashpv ("Coro", TRUE);
1281		1797
1282	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1798	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1283	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1799	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1284	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1800	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1285	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1801	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1286	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1802	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1287	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1803	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1288		1804
1289	coro_current = get_sv ("Coro::current", FALSE);
1290	SvREADONLY_on (coro_current);
1291
1292	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1805	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1293	coro_ready[i] = newAV ();	1806	coro_ready[i] = newAV ();
1294		1807
1295	{	1808	{
1296	SV *sv = perl_get_sv("Coro::API", 1);	1809	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1810	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1297		1811
1298	coroapi.schedule = api_schedule;	1812	coroapi.schedule = api_schedule;
1299	coroapi.save = api_save;
1300	coroapi.cede = api_cede;	1813	coroapi.cede = api_cede;
1301	coroapi.cede_notself = api_cede_notself;	1814	coroapi.cede_notself = api_cede_notself;
1302	coroapi.ready = api_ready;	1815	coroapi.ready = api_ready;
1303	coroapi.is_ready = api_is_ready;	1816	coroapi.is_ready = api_is_ready;
1304	coroapi.nready = &coro_nready;	1817	coroapi.nready = &coro_nready;
…		…
1345	CODE:	1858	CODE:
1346	RETVAL = boolSV (api_ready (self));	1859	RETVAL = boolSV (api_ready (self));
1347	OUTPUT:	1860	OUTPUT:
1348	RETVAL	1861	RETVAL
1349		1862
1350	SV *
1351	is_ready (SV *self)
1352	PROTOTYPE: $
1353	CODE:
1354	RETVAL = boolSV (api_is_ready (self));
1355	OUTPUT:
1356	RETVAL
1357
1358	int	1863	int
1359	nready (...)	1864	nready (...)
1360	PROTOTYPE:	1865	PROTOTYPE:
1361	CODE:	1866	CODE:
1362	RETVAL = coro_nready;	1867	RETVAL = coro_nready;
1363	OUTPUT:	1868	OUTPUT:
1364	RETVAL	1869	RETVAL
1365		1870
		1871	void
		1872	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1873	PROTOTYPE: $;$
		1874	CODE:
		1875	SvREFCNT_dec (self->throw);
		1876	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1877
		1878	# for async_pool speedup
		1879	void
		1880	_pool_1 (SV *cb)
		1881	CODE:
		1882	{
		1883	struct coro *coro = SvSTATE (coro_current);
		1884	HV *hv = (HV *)SvRV (coro_current);
		1885	AV *defav = GvAV (PL_defgv);
		1886	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1887	AV *invoke_av;
		1888	int i, len;
		1889
		1890	if (!invoke)
		1891	croak ("\3async_pool terminate\2\n");
		1892
		1893	SvREFCNT_dec (coro->saved_deffh);
		1894	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1895
		1896	hv_store (hv, "desc", sizeof ("desc") - 1,
		1897	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1898
		1899	invoke_av = (AV *)SvRV (invoke);
		1900	len = av_len (invoke_av);
		1901
		1902	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1903
		1904	if (len > 0)
		1905	{
		1906	av_fill (defav, len - 1);
		1907	for (i = 0; i < len; ++i)
		1908	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1909	}
		1910
		1911	SvREFCNT_dec (invoke);
		1912	}
		1913
		1914	void
		1915	_pool_2 (SV *cb)
		1916	CODE:
		1917	{
		1918	struct coro *coro = SvSTATE (coro_current);
		1919
		1920	sv_setsv (cb, &PL_sv_undef);
		1921
		1922	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1923	coro->saved_deffh = 0;
		1924
		1925	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1926	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1927	croak ("\3async_pool terminate\2\n");
		1928
		1929	av_clear (GvAV (PL_defgv));
		1930	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1931	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1932
		1933	coro->prio = 0;
		1934
		1935	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1936	api_trace (coro_current, 0);
		1937
		1938	av_push (av_async_pool, newSVsv (coro_current));
		1939	}
		1940
		1941
1366	MODULE = Coro::State PACKAGE = Coro::AIO	1942	MODULE = Coro::State PACKAGE = Coro::AIO
1367		1943
1368	SV *	1944	SV *
1369	_get_state ()	1945	_get_state ()
1370	CODE:	1946	CODE:

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