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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 1.210 by root, Wed Oct 10 03:24:40 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
…		…
115	#else	131	#else
116	# define LOCK (void)0	132	# define LOCK (void)0
117	# define UNLOCK (void)0	133	# define UNLOCK (void)0
118	#endif	134	#endif
119		135
		136	#define strpair(const) const, sizeof (const) - 1
		137
120	/* helper storage struct for Coro::AIO */	138	/* helper storage struct for Coro::AIO */
121	struct io_state	139	struct io_state
122	{	140	{
123	int errorno;	141	int errorno;
124	I32 laststype;	142	I32 laststype;
125	int laststatval;	143	int laststatval;
126	Stat_t statcache;	144	Stat_t statcache;
127	};	145	};
128		146
		147	static size_t coro_stacksize = CORO_STACKSIZE;
129	static struct CoroAPI coroapi;	148	static struct CoroAPI coroapi;
130	static AV *main_mainstack; /* used to differentiate between $main and others */	149	static AV *main_mainstack; /* used to differentiate between $main and others */
		150	static JMPENV *main_top_env;
131	static HV *coro_state_stash, *coro_stash;	151	static HV *coro_state_stash, *coro_stash;
132	static SV *coro_mortal; /* will be freed after next transfer */	152	static SV *coro_mortal; /* will be freed after next transfer */
133		153
134	static struct coro_cctx *cctx_first;	154	static GV *irsgv; /* $/ */
		155	static GV *stdoutgv; /* *STDOUT */
		156
		157	static HV *hv_sig; /* %SIG */
		158	static SV *sv_diehook;
		159	static SV *sv_warnhook;
		160
		161	/* async_pool helper stuff */
		162	static SV *sv_pool_rss;
		163	static SV *sv_pool_size;
		164	static AV *av_async_pool;
		165
		166	static struct coro_cctx *cctx_first[3]; /* index by GIMME_V type, void, scalar, array */
135	static int cctx_count, cctx_idle;	167	static int cctx_count, cctx_idle[3];
		168
		169	enum {
		170	CC_MAPPED = 0x01,
		171	CC_NOREUSE = 0x02, /* throw this away after tracing */
		172	CC_TRACE = 0x04,
		173	CC_TRACE_SUB = 0x08, /* trace sub calls */
		174	CC_TRACE_LINE = 0x10, /* trace each statement */
		175	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		176	};
136		177
137	/* this is a structure representing a c-level coroutine */	178	/* this is a structure representing a c-level coroutine */
138	typedef struct coro_cctx {	179	typedef struct coro_cctx {
139	struct coro_cctx *next;	180	struct coro_cctx *next;
140		181
141	/* the stack */	182	/* the stack */
142	void *sptr;	183	void *sptr;
143	ssize_t ssize; /* positive == mmap, otherwise malloc */	184	size_t ssize;
144		185
145	/* cpu state */	186	/* cpu state */
146	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	187	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 */	188	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
148	JMPENV *top_env;	189	JMPENV *top_env;
149	coro_context cctx;	190	coro_context cctx;
150		191
151	int inuse;
152
153	#if USE_VALGRIND	192	#if CORO_USE_VALGRIND
154	int valgrind_id;	193	int valgrind_id;
155	#endif	194	#endif
		195	unsigned char flags;
156	} coro_cctx;	196	} coro_cctx;
157		197
158	enum {	198	enum {
159	CF_RUNNING = 0x0001, /* coroutine is running */	199	CF_RUNNING = 0x0001, /* coroutine is running */
160	CF_READY = 0x0002, /* coroutine is ready */	200	CF_READY = 0x0002, /* coroutine is ready */
161	CF_NEW = 0x0004, /* has never been switched to */	201	CF_NEW = 0x0004, /* has never been switched to */
162	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	202	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
163	};	203	};
164		204
		205	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		206	typedef struct {
		207	SV *defsv;
		208	AV *defav;
		209	SV *errsv;
		210	SV *irsgv;
		211	#define VAR(name,type) type name;
		212	# include "state.h"
		213	#undef VAR
		214	} perl_slots;
		215
		216	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		217
165	/* this is a structure representing a perl-level coroutine */	218	/* this is a structure representing a perl-level coroutine */
166	struct coro {	219	struct coro {
167	/* the c coroutine allocated to this perl coroutine, if any */	220	/* the c coroutine allocated to this perl coroutine, if any */
168	coro_cctx *cctx;	221	coro_cctx *cctx;
		222	int gimme;
169		223
		224	/* process data */
		225	AV *mainstack;
		226	perl_slots *slot; /* basically the saved sp */
		227
170	/* data associated with this coroutine (initial args) */	228	AV *args; /* data associated with this coroutine (initial args) */
171	AV *args;	229	int refcnt; /* coroutines are refcounted, yes */
172	int refcnt;
173	int save; /* CORO_SAVE flags */
174	int flags; /* CF_ flags */	230	int flags; /* CF_ flags */
		231	HV *hv; /* the perl hash associated with this coro, if any */
175		232
176	/* optionally saved, might be zero */	233	/* statistics */
177	AV *defav; /* @_ */	234	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		235
187	/* coro process data */	236	/* coro process data */
188	int prio;	237	int prio;
		238	SV *throw; /* exception to be thrown */
		239
		240	/* async_pool */
		241	SV *saved_deffh;
		242
		243	/* linked list */
		244	struct coro *next, *prev;
189	};	245	};
190		246
191	typedef struct coro *Coro__State;	247	typedef struct coro *Coro__State;
192	typedef struct coro *Coro__State_or_hashref;	248	typedef struct coro *Coro__State_or_hashref;
193		249
…		…
202		258
203	/* for Coro.pm */	259	/* for Coro.pm */
204	static SV *coro_current;	260	static SV *coro_current;
205	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	261	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
206	static int coro_nready;	262	static int coro_nready;
		263	static struct coro *coro_first;
207		264
208	/** lowlevel stuff **********************************************************/	265	/** lowlevel stuff **********************************************************/
209		266
		267	static SV *
		268	coro_get_sv (const char *name, int create)
		269	{
		270	#if PERL_VERSION_ATLEAST (5,9,0)
		271	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		272	get_sv (name, create);
		273	#endif
		274	return get_sv (name, create);
		275	}
		276
210	static AV *	277	static AV *
		278	coro_get_av (const char *name, int create)
		279	{
		280	#if PERL_VERSION_ATLEAST (5,9,0)
		281	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		282	get_av (name, create);
		283	#endif
		284	return get_av (name, create);
		285	}
		286
		287	static HV *
		288	coro_get_hv (const char *name, int create)
		289	{
		290	#if PERL_VERSION_ATLEAST (5,9,0)
		291	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		292	get_hv (name, create);
		293	#endif
		294	return get_hv (name, create);
		295	}
		296
		297	static AV *
211	coro_clone_padlist (CV *cv)	298	coro_clone_padlist (pTHX_ CV *cv)
212	{	299	{
213	AV *padlist = CvPADLIST (cv);	300	AV *padlist = CvPADLIST (cv);
214	AV *newpadlist, *newpad;	301	AV *newpadlist, *newpad;
215		302
216	newpadlist = newAV ();	303	newpadlist = newAV ();
…		…
228		315
229	return newpadlist;	316	return newpadlist;
230	}	317	}
231		318
232	static void	319	static void
233	free_padlist (AV *padlist)	320	free_padlist (pTHX_ AV *padlist)
234	{	321	{
235	/* may be during global destruction */	322	/* may be during global destruction */
236	if (SvREFCNT (padlist))	323	if (SvREFCNT (padlist))
237	{	324	{
238	I32 i = AvFILLp (padlist);	325	I32 i = AvFILLp (padlist);
…		…
259	AV *padlist;	346	AV *padlist;
260	AV *av = (AV *)mg->mg_obj;	347	AV *av = (AV *)mg->mg_obj;
261		348
262	/* casting is fun. */	349	/* casting is fun. */
263	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	350	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264	free_padlist (padlist);	351	free_padlist (aTHX_ padlist);
265		352
266	SvREFCNT_dec (av);	353	SvREFCNT_dec (av);
267		354
268	return 0;	355	return 0;
269	}	356	}
…		…
277	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	364	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
278	? SvMAGIC (cv) \	365	? SvMAGIC (cv) \
279	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	366	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
280	: 0	367	: 0
281		368
		369	static struct coro *
		370	SvSTATE_ (pTHX_ SV *coro)
		371	{
		372	HV *stash;
		373	MAGIC *mg;
		374
		375	if (SvROK (coro))
		376	coro = SvRV (coro);
		377
		378	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		379	croak ("Coro::State object required");
		380
		381	stash = SvSTASH (coro);
		382	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		383	{
		384	/* very slow, but rare, check */
		385	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		386	croak ("Coro::State object required");
		387	}
		388
		389	mg = CORO_MAGIC (coro);
		390	return (struct coro *)mg->mg_ptr;
		391	}
		392
		393	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		394
282	/* the next two functions merely cache the padlists */	395	/* the next two functions merely cache the padlists */
283	static void	396	static void
284	get_padlist (CV *cv)	397	get_padlist (pTHX_ CV *cv)
285	{	398	{
286	MAGIC *mg = CORO_MAGIC (cv);	399	MAGIC *mg = CORO_MAGIC (cv);
287	AV *av;	400	AV *av;
288		401
289	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	402	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
290	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	403	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
291	else	404	else
292	{	405	{
293	#if PREFER_PERL_FUNCTIONS	406	#if CORO_PREFER_PERL_FUNCTIONS
294	/* this is probably cleaner, but also slower? */	407	/* this is probably cleaner, but also slower? */
295	CV *cp = Perl_cv_clone (cv);	408	CV *cp = Perl_cv_clone (cv);
296	CvPADLIST (cv) = CvPADLIST (cp);	409	CvPADLIST (cv) = CvPADLIST (cp);
297	CvPADLIST (cp) = 0;	410	CvPADLIST (cp) = 0;
298	SvREFCNT_dec (cp);	411	SvREFCNT_dec (cp);
299	#else	412	#else
300	CvPADLIST (cv) = coro_clone_padlist (cv);	413	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
301	#endif	414	#endif
302	}	415	}
303	}	416	}
304		417
305	static void	418	static void
306	put_padlist (CV *cv)	419	put_padlist (pTHX_ CV *cv)
307	{	420	{
308	MAGIC *mg = CORO_MAGIC (cv);	421	MAGIC *mg = CORO_MAGIC (cv);
309	AV *av;	422	AV *av;
310		423
311	if (!mg)	424	if (expect_false (!mg))
312	{	425	{
313	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	426	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
314	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	427	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
315	mg->mg_virtual = &vtbl_coro;	428	mg->mg_virtual = &vtbl_coro;
316	mg->mg_obj = (SV *)newAV ();	429	mg->mg_obj = (SV *)newAV ();
317	}	430	}
318		431
319	av = (AV *)mg->mg_obj;	432	av = (AV *)mg->mg_obj;
320		433
321	if (AvFILLp (av) >= AvMAX (av))	434	if (expect_false (AvFILLp (av) >= AvMAX (av)))
322	av_extend (av, AvMAX (av) + 1);	435	av_extend (av, AvMAX (av) + 1);
323		436
324	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	437	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
325	}	438	}
326		439
327	/** load & save, init *******************************************************/	440	/** load & save, init *******************************************************/
328		441
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	442	static void
335	load_perl (Coro__State c)	443	load_perl (pTHX_ Coro__State c)
336	{	444	{
		445	perl_slots *slot = c->slot;
		446	c->slot = 0;
		447
		448	PL_mainstack = c->mainstack;
		449
		450	GvSV (PL_defgv) = slot->defsv;
		451	GvAV (PL_defgv) = slot->defav;
		452	GvSV (PL_errgv) = slot->errsv;
		453	GvSV (irsgv) = slot->irsgv;
		454
337	#define VAR(name,type) PL_ ## name = c->name;	455	#define VAR(name,type) PL_ ## name = slot->name;
338	# include "state.h"	456	# include "state.h"
339	#undef VAR	457	#undef VAR
340		458
341	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	459	/*hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);*/
342	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	460	/*hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);*/
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		461
356	{	462	{
357	dSP;	463	dSP;
		464
358	CV *cv;	465	CV *cv;
359		466
360	/* now do the ugly restore mess */	467	/* now do the ugly restore mess */
361	while ((cv = (CV *)POPs))	468	while (expect_true (cv = (CV *)POPs))
362	{	469	{
363	put_padlist (cv); /* mark this padlist as available */	470	put_padlist (aTHX_ cv); /* mark this padlist as available */
364	CvDEPTH (cv) = PTR2IV (POPs);	471	CvDEPTH (cv) = PTR2IV (POPs);
365	CvPADLIST (cv) = (AV *)POPs;	472	CvPADLIST (cv) = (AV *)POPs;
366	}	473	}
367		474
368	PUTBACK;	475	PUTBACK;
369	}	476	}
370	}	477	}
371		478
372	static void	479	static void
373	save_perl (Coro__State c)	480	save_perl (pTHX_ Coro__State c)
374	{	481	{
375	{	482	{
376	dSP;	483	dSP;
377	I32 cxix = cxstack_ix;	484	I32 cxix = cxstack_ix;
378	PERL_CONTEXT *ccstk = cxstack;	485	PERL_CONTEXT *ccstk = cxstack;
…		…
381	/*	488	/*
382	* the worst thing you can imagine happens first - we have to save	489	* the worst thing you can imagine happens first - we have to save
383	* (and reinitialize) all cv's in the whole callchain :(	490	* (and reinitialize) all cv's in the whole callchain :(
384	*/	491	*/
385		492
386	EXTEND (SP, 3 + 1);
387	PUSHs (Nullsv);	493	XPUSHs (Nullsv);
388	/* this loop was inspired by pp_caller */	494	/* this loop was inspired by pp_caller */
389	for (;;)	495	for (;;)
390	{	496	{
391	while (cxix >= 0)	497	while (expect_true (cxix >= 0))
392	{	498	{
393	PERL_CONTEXT *cx = &ccstk[cxix--];	499	PERL_CONTEXT *cx = &ccstk[cxix--];
394		500
395	if (CxTYPE (cx) == CXt_SUB)	501	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
396	{	502	{
397	CV *cv = cx->blk_sub.cv;	503	CV *cv = cx->blk_sub.cv;
398		504
399	if (CvDEPTH (cv))	505	if (expect_true (CvDEPTH (cv)))
400	{	506	{
401	EXTEND (SP, 3);	507	EXTEND (SP, 3);
402	PUSHs ((SV *)CvPADLIST (cv));	508	PUSHs ((SV *)CvPADLIST (cv));
403	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	509	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
404	PUSHs ((SV *)cv);	510	PUSHs ((SV *)cv);
405		511
406	CvDEPTH (cv) = 0;	512	CvDEPTH (cv) = 0;
407	get_padlist (cv);	513	get_padlist (aTHX_ cv);
408	}	514	}
409	}	515	}
410	}	516	}
411		517
412	if (top_si->si_type == PERLSI_MAIN)	518	if (expect_true (top_si->si_type == PERLSI_MAIN))
413	break;	519	break;
414		520
415	top_si = top_si->si_prev;	521	top_si = top_si->si_prev;
416	ccstk = top_si->si_cxstack;	522	ccstk = top_si->si_cxstack;
417	cxix = top_si->si_cxix;	523	cxix = top_si->si_cxix;
418	}	524	}
419		525
420	PUTBACK;	526	PUTBACK;
421	}	527	}
422		528
423	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	529	/* allocate some space on the context stack for our purposes */
424	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	530	/* we manually unroll here, as usually 2 slots is enough */
425	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	531	if (SLOT_COUNT >= 1) CXINC;
426	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	532	if (SLOT_COUNT >= 2) CXINC;
		533	if (SLOT_COUNT >= 3) CXINC;
		534	{
		535	int i;
		536	for (i = 3; i < SLOT_COUNT; ++i)
		537	CXINC;
		538	}
		539	cxstack_ix -= SLOT_COUNT; /* undo allocation */
427		540
		541	c->mainstack = PL_mainstack;
		542
		543	{
		544	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		545
		546	slot->defav = GvAV (PL_defgv);
		547	slot->defsv = DEFSV;
		548	slot->errsv = ERRSV;
		549	slot->irsgv = GvSV (irsgv);
		550
428	#define VAR(name,type)c->name = PL_ ## name;	551	#define VAR(name,type) slot->name = PL_ ## name;
429	# include "state.h"	552	# include "state.h"
430	#undef VAR	553	#undef VAR
		554	}
431	}	555	}
432		556
433	/*	557	/*
434	* allocate various perl stacks. This is an exact copy	558	* allocate various perl stacks. This is an exact copy
435	* of perl.c:init_stacks, except that it uses less memory	559	* of perl.c:init_stacks, except that it uses less memory
436	* on the (sometimes correct) assumption that coroutines do	560	* on the (sometimes correct) assumption that coroutines do
437	* not usually need a lot of stackspace.	561	* not usually need a lot of stackspace.
438	*/	562	*/
439	#if PREFER_PERL_FUNCTIONS	563	#if CORO_PREFER_PERL_FUNCTIONS
440	# define coro_init_stacks init_stacks	564	# define coro_init_stacks init_stacks
441	#else	565	#else
442	static void	566	static void
443	coro_init_stacks ()	567	coro_init_stacks (pTHX)
444	{	568	{
445	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	569	PL_curstackinfo = new_stackinfo(32, 8);
446	PL_curstackinfo->si_type = PERLSI_MAIN;	570	PL_curstackinfo->si_type = PERLSI_MAIN;
447	PL_curstack = PL_curstackinfo->si_stack;	571	PL_curstack = PL_curstackinfo->si_stack;
448	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	572	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449		573
450	PL_stack_base = AvARRAY(PL_curstack);	574	PL_stack_base = AvARRAY(PL_curstack);
451	PL_stack_sp = PL_stack_base;	575	PL_stack_sp = PL_stack_base;
452	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	576	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453		577
454	New(50,PL_tmps_stack,128,SV*);	578	New(50,PL_tmps_stack,32,SV*);
455	PL_tmps_floor = -1;	579	PL_tmps_floor = -1;
456	PL_tmps_ix = -1;	580	PL_tmps_ix = -1;
457	PL_tmps_max = 128;	581	PL_tmps_max = 32;
458		582
459	New(54,PL_markstack,32,I32);	583	New(54,PL_markstack,16,I32);
460	PL_markstack_ptr = PL_markstack;	584	PL_markstack_ptr = PL_markstack;
461	PL_markstack_max = PL_markstack + 32;	585	PL_markstack_max = PL_markstack + 16;
462		586
463	#ifdef SET_MARK_OFFSET	587	#ifdef SET_MARK_OFFSET
464	SET_MARK_OFFSET;	588	SET_MARK_OFFSET;
465	#endif	589	#endif
466		590
467	New(54,PL_scopestack,32,I32);	591	New(54,PL_scopestack,8,I32);
468	PL_scopestack_ix = 0;	592	PL_scopestack_ix = 0;
469	PL_scopestack_max = 32;	593	PL_scopestack_max = 8;
470		594
471	New(54,PL_savestack,64,ANY);	595	New(54,PL_savestack,24,ANY);
472	PL_savestack_ix = 0;	596	PL_savestack_ix = 0;
473	PL_savestack_max = 64;	597	PL_savestack_max = 24;
474		598
475	#if !PERL_VERSION_ATLEAST (5,9,0)	599	#if !PERL_VERSION_ATLEAST (5,9,0)
476	New(54,PL_retstack,16,OP*);	600	New(54,PL_retstack,4,OP*);
477	PL_retstack_ix = 0;	601	PL_retstack_ix = 0;
478	PL_retstack_max = 16;	602	PL_retstack_max = 4;
479	#endif	603	#endif
480	}	604	}
481	#endif	605	#endif
482		606
483	/*	607	/*
484	* destroy the stacks, the callchain etc...	608	* destroy the stacks, the callchain etc...
485	*/	609	*/
486	static void	610	static void
487	coro_destroy_stacks ()	611	coro_destroy_stacks (pTHX)
488	{	612	{
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)	613	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;	614	PL_curstackinfo = PL_curstackinfo->si_next;
508		615
509	while (PL_curstackinfo)	616	while (PL_curstackinfo)
510	{	617	{
…		…
525	#if !PERL_VERSION_ATLEAST (5,9,0)	632	#if !PERL_VERSION_ATLEAST (5,9,0)
526	Safefree (PL_retstack);	633	Safefree (PL_retstack);
527	#endif	634	#endif
528	}	635	}
529		636
		637	static size_t
		638	coro_rss (pTHX_ struct coro *coro)
		639	{
		640	size_t rss = sizeof (*coro);
		641
		642	if (coro->mainstack)
		643	{
		644	perl_slots tmp_slot;
		645	perl_slots *slot;
		646
		647	if (coro->flags & CF_RUNNING)
		648	{
		649	slot = &tmp_slot;
		650
		651	#define VAR(name,type) slot->name = PL_ ## name;
		652	# include "state.h"
		653	#undef VAR
		654	}
		655	else
		656	slot = coro->slot;
		657
		658	rss += sizeof (slot->curstackinfo);
		659	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		660	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		661	rss += slot->tmps_max * sizeof (SV *);
		662	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		663	rss += slot->scopestack_max * sizeof (I32);
		664	rss += slot->savestack_max * sizeof (ANY);
		665
		666	#if !PERL_VERSION_ATLEAST (5,9,0)
		667	rss += slot->retstack_max * sizeof (OP *);
		668	#endif
		669	}
		670
		671	return rss;
		672	}
		673
530	/** coroutine stack handling ************************************************/	674	/** coroutine stack handling ************************************************/
531		675
532	static void	676	static void
533	setup_coro (struct coro *coro)	677	coro_setup (pTHX_ struct coro *coro)
534	{	678	{
535	/*	679	/*
536	* emulate part of the perl startup here.	680	* emulate part of the perl startup here.
537	*/	681	*/
538
539	coro_init_stacks ();	682	coro_init_stacks (aTHX);
540		683
		684	PL_runops = RUNOPS_DEFAULT;
541	PL_curcop = &PL_compiling;	685	PL_curcop = &PL_compiling;
542	PL_in_eval = EVAL_NULL;	686	PL_in_eval = EVAL_NULL;
		687	PL_comppad = 0;
543	PL_curpm = 0;	688	PL_curpm = 0;
		689	PL_curpad = 0;
544	PL_localizing = 0;	690	PL_localizing = 0;
545	PL_dirty = 0;	691	PL_dirty = 0;
546	PL_restartop = 0;	692	PL_restartop = 0;
		693	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		694	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		695
		696	GvSV (PL_defgv) = newSV (0);
		697	GvAV (PL_defgv) = coro->args; coro->args = 0;
		698	GvSV (PL_errgv) = newSV (0);
		699	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		700	PL_rs = newSVsv (GvSV (irsgv));
		701	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
547		702
548	{	703	{
549	dSP;	704	dSP;
550	LOGOP myop;	705	LOGOP myop;
551		706
552	SvREFCNT_dec (GvAV (PL_defgv));
553	GvAV (PL_defgv) = coro->args; coro->args = 0;
554
555	Zero (&myop, 1, LOGOP);	707	Zero (&myop, 1, LOGOP);
556	myop.op_next = Nullop;	708	myop.op_next = Nullop;
557	myop.op_flags = OPf_WANT_VOID;	709	myop.op_flags = OPf_WANT_VOID;
558		710
559	PUSHMARK (SP);	711	PUSHMARK (SP);
560	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	712	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
561	PUTBACK;	713	PUTBACK;
562	PL_op = (OP *)&myop;	714	PL_op = (OP *)&myop;
563	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	715	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
564	SPAGAIN;	716	SPAGAIN;
		717
		718	/*
		719	* now its very tricky. the "tail" of the next transfer might end up
		720	* either in a new cctx, or an existing one.
		721	* in case of an existing one we have to take care of whatever
		722	* entersub and transfer do to the perl stack.
		723	*/
		724	ENTER;
		725	EXTEND (SP, 4);
		726	PUSHs ((SV *)0); /* items */
		727	PUSHs ((SV *)0); /* ix, set_stacklevel */
		728	PUSHs ((SV *)(sp - PL_stack_base + 1)); /* ax */
		729	PUSHs ((SV *)0); /* again */
		730	PUTBACK;
565	}	731	}
566		732
567	ENTER; /* necessary e.g. for dounwind */	733	/* this newly created coroutine might be run on an existing cctx which most
		734	* likely was suspended in set_stacklevel, called from entersub.
		735	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		736	* so we ENTER here for symmetry
		737	*/
		738	ENTER;
568	}	739	}
569		740
570	static void	741	static void
		742	coro_destroy (pTHX_ struct coro *coro)
		743	{
		744	if (!IN_DESTRUCT)
		745	{
		746	/* restore all saved variables and stuff */
		747	LEAVE_SCOPE (0);
		748	assert (PL_tmps_floor == -1);
		749
		750	/* free all temporaries */
		751	FREETMPS;
		752	assert (PL_tmps_ix == -1);
		753
		754	/* unwind all extra stacks */
		755	POPSTACK_TO (PL_mainstack);
		756
		757	/* unwind main stack */
		758	dounwind (-1);
		759	}
		760
		761	SvREFCNT_dec (GvSV (PL_defgv));
		762	SvREFCNT_dec (GvAV (PL_defgv));
		763	SvREFCNT_dec (GvSV (PL_errgv));
		764	SvREFCNT_dec (PL_defoutgv);
		765	SvREFCNT_dec (PL_rs);
		766	SvREFCNT_dec (GvSV (irsgv));
		767
		768	SvREFCNT_dec (PL_diehook);
		769	SvREFCNT_dec (PL_warnhook);
		770
		771	SvREFCNT_dec (coro->saved_deffh);
		772	SvREFCNT_dec (coro->throw);
		773
		774	coro_destroy_stacks (aTHX);
		775	}
		776
		777	static void
571	free_coro_mortal ()	778	free_coro_mortal (pTHX)
572	{	779	{
573	if (coro_mortal)	780	if (expect_true (coro_mortal))
574	{	781	{
575	SvREFCNT_dec (coro_mortal);	782	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;	783	coro_mortal = 0;
577	}	784	}
578	}	785	}
579		786
		787	static int
		788	runops_trace (pTHX)
		789	{
		790	COP *oldcop = 0;
		791	int oldcxix = -2;
		792	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		793	coro_cctx *cctx = coro->cctx;
		794
		795	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		796	{
		797	PERL_ASYNC_CHECK ();
		798
		799	if (cctx->flags & CC_TRACE_ALL)
		800	{
		801	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		802	{
		803	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		804	SV **bot, **top;
		805	AV *av = newAV (); /* return values */
		806	SV **cb;
		807	dSP;
		808
		809	GV *gv = CvGV (cx->blk_sub.cv);
		810	SV *fullname = sv_2mortal (newSV (0));
		811	if (isGV (gv))
		812	gv_efullname3 (fullname, gv, 0);
		813
		814	bot = PL_stack_base + cx->blk_oldsp + 1;
		815	top = cx->blk_gimme == G_ARRAY ? SP + 1
		816	: cx->blk_gimme == G_SCALAR ? bot + 1
		817	: bot;
		818
		819	av_extend (av, top - bot);
		820	while (bot < top)
		821	av_push (av, SvREFCNT_inc (*bot++));
		822
		823	PL_runops = RUNOPS_DEFAULT;
		824	ENTER;
		825	SAVETMPS;
		826	EXTEND (SP, 3);
		827	PUSHMARK (SP);
		828	PUSHs (&PL_sv_no);
		829	PUSHs (fullname);
		830	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		831	PUTBACK;
		832	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		833	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		834	SPAGAIN;
		835	FREETMPS;
		836	LEAVE;
		837	PL_runops = runops_trace;
		838	}
		839
		840	if (oldcop != PL_curcop)
		841	{
		842	oldcop = PL_curcop;
		843
		844	if (PL_curcop != &PL_compiling)
		845	{
		846	SV **cb;
		847
		848	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		849	{
		850	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		851
		852	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		853	{
		854	runops_proc_t old_runops = PL_runops;
		855	dSP;
		856	GV *gv = CvGV (cx->blk_sub.cv);
		857	SV *fullname = sv_2mortal (newSV (0));
		858
		859	if (isGV (gv))
		860	gv_efullname3 (fullname, gv, 0);
		861
		862	PL_runops = RUNOPS_DEFAULT;
		863	ENTER;
		864	SAVETMPS;
		865	EXTEND (SP, 3);
		866	PUSHMARK (SP);
		867	PUSHs (&PL_sv_yes);
		868	PUSHs (fullname);
		869	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		870	PUTBACK;
		871	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		872	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		873	SPAGAIN;
		874	FREETMPS;
		875	LEAVE;
		876	PL_runops = runops_trace;
		877	}
		878
		879	oldcxix = cxstack_ix;
		880	}
		881
		882	if (cctx->flags & CC_TRACE_LINE)
		883	{
		884	dSP;
		885
		886	PL_runops = RUNOPS_DEFAULT;
		887	ENTER;
		888	SAVETMPS;
		889	EXTEND (SP, 3);
		890	PL_runops = RUNOPS_DEFAULT;
		891	PUSHMARK (SP);
		892	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		893	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		894	PUTBACK;
		895	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		896	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		897	SPAGAIN;
		898	FREETMPS;
		899	LEAVE;
		900	PL_runops = runops_trace;
		901	}
		902	}
		903	}
		904	}
		905	}
		906
		907	TAINT_NOT;
		908	return 0;
		909	}
		910
580	/* inject a fake call to Coro::State::_cctx_init into the execution */	911	/* inject a fake call to Coro::State::_cctx_init into the execution */
		912	/* _cctx_init should be careful, as it could be called at almost any time */
		913	/* during execution of a perl program */
581	static void NOINLINE	914	static void NOINLINE
582	prepare_cctx (coro_cctx *cctx)	915	cctx_prepare (pTHX_ coro_cctx *cctx)
583	{	916	{
584	dSP;	917	dSP;
585	LOGOP myop;	918	LOGOP myop;
		919
		920	PL_top_env = &PL_start_env;
		921
		922	if (cctx->flags & CC_TRACE)
		923	PL_runops = runops_trace;
586		924
587	Zero (&myop, 1, LOGOP);	925	Zero (&myop, 1, LOGOP);
588	myop.op_next = PL_op;	926	myop.op_next = PL_op;
589	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	927	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
590		928
…		…
596	PL_op = (OP *)&myop;	934	PL_op = (OP *)&myop;
597	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	935	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
598	SPAGAIN;	936	SPAGAIN;
599	}	937	}
600		938
		939	/*
		940	* this is a _very_ stripped down perl interpreter ;)
		941	*/
601	static void	942	static void
602	coro_run (void *arg)	943	cctx_run (void *arg)
603	{	944	{
		945	dTHX;
		946
604	/* coro_run is the alternative tail of transfer(), so unlock here. */	947	/* cctx_run is the alternative tail of transfer(), so unlock here. */
605	UNLOCK;	948	UNLOCK;
606		949
607	/*	950	/* we now skip the entersub that lead to transfer() */
608	* this is a _very_ stripped down perl interpreter ;)	951	PL_op = PL_op->op_next;
609	*/
610	PL_top_env = &PL_start_env;
611		952
612	/* inject call to cctx_init */	953	/* inject a fake subroutine call to cctx_init */
613	prepare_cctx ((coro_cctx *)arg);	954	cctx_prepare (aTHX_ (coro_cctx *)arg);
614		955
615	/* somebody will hit me for both perl_run and PL_restartop */	956	/* somebody or something will hit me for both perl_run and PL_restartop */
616	PL_restartop = PL_op;	957	PL_restartop = PL_op;
617	perl_run (PL_curinterp);	958	perl_run (PL_curinterp);
618		959
619	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	960	/*
620	abort ();	961	* If perl-run returns we assume exit() was being called or the coro
		962	* fell off the end, which seems to be the only valid (non-bug)
		963	* reason for perl_run to return. We try to exit by jumping to the
		964	* bootstrap-time "top" top_env, as we cannot restore the "main"
		965	* coroutine as Coro has no such concept
		966	*/
		967	PL_top_env = main_top_env;
		968	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
621	}	969	}
622		970
623	static coro_cctx *	971	static coro_cctx *
624	cctx_new ()	972	cctx_new ()
625	{	973	{
626	coro_cctx *cctx;	974	coro_cctx *cctx;
		975	void *stack_start;
		976	size_t stack_size;
627		977
628	++cctx_count;	978	++cctx_count;
629		979
630	Newz (0, cctx, 1, coro_cctx);	980	Newz (0, cctx, 1, coro_cctx);
631		981
632	#if HAVE_MMAP	982	#if HAVE_MMAP
633
634	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	983	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
635	/* mmap supposedly does allocate-on-write for us */	984	/* 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);	985	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
637		986
638	if (cctx->sptr != (void *)-1)	987	if (cctx->sptr != (void *)-1)
639	{	988	{
640	# if STACKGUARD	989	# if CORO_STACKGUARD
641	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	990	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
642	# endif	991	# endif
643	REGISTER_STACK (
644	cctx,
645	STACKGUARD * PAGESIZE + (char *)cctx->sptr,	992	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
646	cctx->ssize + (char *)cctx->sptr	993	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
647	);	994	cctx->flags |= CC_MAPPED;
648
649	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
650	}	995	}
651	else	996	else
652	#endif	997	#endif
653	{	998	{
654	cctx->ssize = -STACKSIZE * (long)sizeof (long);	999	cctx->ssize = coro_stacksize * (long)sizeof (long);
655	New (0, cctx->sptr, STACKSIZE, long);	1000	New (0, cctx->sptr, coro_stacksize, long);
656		1001
657	if (!cctx->sptr)	1002	if (!cctx->sptr)
658	{	1003	{
659	perror ("FATAL: unable to allocate stack for coroutine");	1004	perror ("FATAL: unable to allocate stack for coroutine");
660	_exit (EXIT_FAILURE);	1005	_exit (EXIT_FAILURE);
661	}	1006	}
662		1007
663	REGISTER_STACK (	1008	stack_start = cctx->sptr;
664	cctx,	1009	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	}	1010	}
		1011
		1012	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		1013	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
671		1014
672	return cctx;	1015	return cctx;
673	}	1016	}
674		1017
675	static void	1018	static void
…		…
678	if (!cctx)	1021	if (!cctx)
679	return;	1022	return;
680		1023
681	--cctx_count;	1024	--cctx_count;
682		1025
683	#if USE_VALGRIND	1026	#if CORO_USE_VALGRIND
684	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1027	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
685	#endif	1028	#endif
686		1029
687	#if HAVE_MMAP	1030	#if HAVE_MMAP
688	if (cctx->ssize > 0)	1031	if (cctx->flags & CC_MAPPED)
689	munmap (cctx->sptr, cctx->ssize);	1032	munmap (cctx->sptr, cctx->ssize);
690	else	1033	else
691	#endif	1034	#endif
692	Safefree (cctx->sptr);	1035	Safefree (cctx->sptr);
693		1036
694	Safefree (cctx);	1037	Safefree (cctx);
695	}	1038	}
696		1039
		1040	/* wether this cctx should be destructed */
		1041	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1042
697	static coro_cctx *	1043	static coro_cctx *
698	cctx_get ()	1044	cctx_get (pTHX_ int gimme)
699	{	1045	{
700	coro_cctx *cctx;	1046	while (expect_true (cctx_first[gimme]))
701
702	if (cctx_first)
703	{	1047	{
704	cctx = cctx_first;	1048	coro_cctx *cctx = cctx_first[gimme];
705	cctx_first = cctx->next;	1049	cctx_first[gimme] = cctx->next;
706	--cctx_idle;	1050	--cctx_idle[gimme];
707	}	1051
708	else	1052	if (expect_true (!CCTX_EXPIRED (cctx)))
709	{	1053	return cctx;
710	cctx = cctx_new ();	1054
711	PL_op = PL_op->op_next;	1055	cctx_destroy (cctx);
712	}	1056	}
713		1057
		1058	assert (!gimme);
714	return cctx;	1059	return cctx_new ();
715	}	1060	}
716		1061
717	static void	1062	static void
718	cctx_put (coro_cctx *cctx)	1063	cctx_put (coro_cctx *cctx, int gimme)
719	{	1064	{
720	/* free another cctx if overlimit */	1065	/* free another cctx if overlimit */
721	if (cctx_idle >= MAX_IDLE_CCTX)	1066	if (expect_false (cctx_idle[gimme] >= MAX_IDLE_CCTX))
722	{	1067	{
723	coro_cctx *first = cctx_first;	1068	coro_cctx *first = cctx_first[gimme];
724	cctx_first = first->next;	1069	cctx_first[gimme] = first->next;
725	--cctx_idle;	1070	--cctx_idle[gimme];
726		1071
727	assert (!first->inuse);
728	cctx_destroy (first);	1072	cctx_destroy (first);
729	}	1073	}
730		1074
731	++cctx_idle;	1075	++cctx_idle[gimme];
732	cctx->next = cctx_first;	1076	cctx->next = cctx_first[gimme];
733	cctx_first = cctx;	1077	cctx_first[gimme] = cctx;
734	}	1078	}
735		1079
736	/** coroutine switching *****************************************************/	1080	/** coroutine switching *****************************************************/
737		1081
738	/* never call directly, always through the coro_state_transfer global variable */	1082	static void
		1083	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1084	{
		1085	if (expect_true (prev != next))
		1086	{
		1087	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1088	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1089
		1090	if (expect_false (next->flags & CF_RUNNING))
		1091	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1092
		1093	if (expect_false (next->flags & CF_DESTROYED))
		1094	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1095
		1096	if (
		1097	#if PERL_VERSION_ATLEAST (5,9,0)
		1098	expect_false (PL_parser)
		1099	#else
		1100	expect_false (PL_lex_state != LEX_NOTPARSING)
		1101	#endif
		1102	)
		1103	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1104	}
		1105	}
		1106
		1107	/* always use the TRANSFER macro */
739	static void NOINLINE	1108	static void NOINLINE
740	transfer (struct coro *prev, struct coro *next)	1109	transfer (pTHX_ struct coro *prev, struct coro *next)
741	{	1110	{
742	dSTACKLEVEL;	1111	dSTACKLEVEL;
743		1112
744	/* sometimes transfer is only called to set idle_sp */	1113	/* sometimes transfer is only called to set idle_sp */
745	if (!next)	1114	if (expect_false (!next))
746	{	1115	{
747	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1116	((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 */	1117	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
749	}	1118	}
750	else if (prev != next)	1119	else if (expect_true (prev != next))
751	{	1120	{
752	coro_cctx *prev__cctx;	1121	coro_cctx *prev__cctx;
753		1122
754	if (prev->flags & CF_NEW)	1123	if (expect_false (prev->flags & CF_NEW))
755	{	1124	{
756	/* create a new empty context */	1125	/* create a new empty context */
757	Newz (0, prev->cctx, 1, coro_cctx);	1126	Newz (0, prev->cctx, 1, coro_cctx);
758	prev->cctx->inuse = 1;
759	prev->flags &= ~CF_NEW;	1127	prev->flags &= ~CF_NEW;
760	prev->flags |= CF_RUNNING;	1128	prev->flags |= CF_RUNNING;
761	}	1129	}
762		1130
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;	1131	prev->flags &= ~CF_RUNNING;
774	next->flags |= CF_RUNNING;	1132	next->flags |= CF_RUNNING;
775		1133
776	LOCK;	1134	LOCK;
777		1135
778	if (next->flags & CF_NEW)	1136	if (expect_false (next->flags & CF_NEW))
779	{	1137	{
780	/* need to start coroutine */	1138	/* need to start coroutine */
781	next->flags &= ~CF_NEW;	1139	next->flags &= ~CF_NEW;
782	/* first get rid of the old state */	1140	/* first get rid of the old state */
783	save_perl (prev);	1141	save_perl (aTHX_ prev);
784	/* setup coroutine call */	1142	/* setup coroutine call */
785	setup_coro (next);	1143	coro_setup (aTHX_ next);
786	/* need a new stack */
787	assert (!next->cctx);
788	}	1144	}
789	else	1145	else
790	{	1146	{
791	/* coroutine already started */	1147	/* coroutine already started */
792	save_perl (prev);	1148	save_perl (aTHX_ prev);
793	load_perl (next);	1149	load_perl (aTHX_ next);
794	}	1150	}
795		1151
796	prev__cctx = prev->cctx;	1152	prev__cctx = prev->cctx;
797		1153
798	/* possibly "free" the cctx */	1154	/* possibly "free" the cctx */
799	if (prev__cctx->idle_sp == STACKLEVEL)	1155	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
800	{	1156	{
801	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1157	/* 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));	1158	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
803		1159
804	prev->cctx = 0;	1160	prev->cctx = 0;
805		1161
		1162	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1163	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1164	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1165	if (!next->cctx)
		1166	next->cctx = cctx_get (aTHX_ next->gimme);
		1167
806	cctx_put (prev__cctx);	1168	cctx_put (prev__cctx, prev->gimme);
807	prev__cctx->inuse = 0;
808	}	1169	}
809		1170
		1171	++next->usecount;
		1172
810	if (!next->cctx)	1173	if (expect_true (!next->cctx))
811	{
812	next->cctx = cctx_get ();	1174	next->cctx = cctx_get (aTHX_ next->gimme);
813	assert (!next->cctx->inuse);
814	next->cctx->inuse = 1;
815	}
816		1175
817	if (prev__cctx != next->cctx)	1176	if (expect_false (prev__cctx != next->cctx))
818	{	1177	{
819	prev__cctx->top_env = PL_top_env;	1178	prev__cctx->top_env = PL_top_env;
820	PL_top_env = next->cctx->top_env;	1179	PL_top_env = next->cctx->top_env;
821	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1180	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
822	}	1181	}
823		1182
824	free_coro_mortal ();	1183	free_coro_mortal (aTHX);
825	UNLOCK;	1184	UNLOCK;
		1185
		1186	if (expect_false (prev->throw || next->throw))
		1187	{
		1188	struct coro *coro = SvSTATE (coro_current);
		1189
		1190	if (coro->throw)
		1191	{
		1192	SV *exception = coro->throw;
		1193	coro->throw = 0;
		1194	sv_setsv (ERRSV, exception);
		1195	croak (0);
		1196	}
		1197	}
826	}	1198	}
827	}	1199	}
828		1200
829	struct transfer_args	1201	struct transfer_args
830	{	1202	{
831	struct coro *prev, *next;	1203	struct coro *prev, *next;
832	};	1204	};
833		1205
834	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1206	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1207	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
835		1208
836	/** high level stuff ********************************************************/	1209	/** high level stuff ********************************************************/
837		1210
838	static int	1211	static int
839	coro_state_destroy (struct coro *coro)	1212	coro_state_destroy (pTHX_ struct coro *coro)
840	{	1213	{
841	if (coro->flags & CF_DESTROYED)	1214	if (coro->flags & CF_DESTROYED)
842	return 0;	1215	return 0;
843		1216
844	coro->flags |= CF_DESTROYED;	1217	coro->flags |= CF_DESTROYED;
…		…
856		1229
857	if (coro->mainstack && coro->mainstack != main_mainstack)	1230	if (coro->mainstack && coro->mainstack != main_mainstack)
858	{	1231	{
859	struct coro temp;	1232	struct coro temp;
860		1233
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)	1234	if (coro->flags & CF_RUNNING)
867	croak ("FATAL: tried to destroy currently running coroutine");	1235	croak ("FATAL: tried to destroy currently running coroutine");
868		1236
869	save_perl (&temp);	1237	save_perl (aTHX_ &temp);
870	load_perl (coro);	1238	load_perl (aTHX_ coro);
871		1239
872	coro_destroy_stacks ();	1240	coro_destroy (aTHX_ coro);
873		1241
874	load_perl (&temp); /* this will get rid of defsv etc.. */	1242	load_perl (aTHX_ &temp);
875		1243
876	coro->mainstack = 0;	1244	coro->slot = 0;
877	}	1245	}
878		1246
879	cctx_destroy (coro->cctx);	1247	cctx_destroy (coro->cctx);
880	SvREFCNT_dec (coro->args);	1248	SvREFCNT_dec (coro->args);
881		1249
		1250	if (coro->next) coro->next->prev = coro->prev;
		1251	if (coro->prev) coro->prev->next = coro->next;
		1252	if (coro == coro_first) coro_first = coro->next;
		1253
882	return 1;	1254	return 1;
883	}	1255	}
884		1256
885	static int	1257	static int
886	coro_state_free (pTHX_ SV *sv, MAGIC *mg)	1258	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
887	{	1259	{
888	struct coro *coro = (struct coro *)mg->mg_ptr;	1260	struct coro *coro = (struct coro *)mg->mg_ptr;
889	mg->mg_ptr = 0;	1261	mg->mg_ptr = 0;
890		1262
		1263	coro->hv = 0;
		1264
891	if (--coro->refcnt < 0)	1265	if (--coro->refcnt < 0)
892	{	1266	{
893	coro_state_destroy (coro);	1267	coro_state_destroy (aTHX_ coro);
894	Safefree (coro);	1268	Safefree (coro);
895	}	1269	}
896		1270
897	return 0;	1271	return 0;
898	}	1272	}
…		…
916	#else	1290	#else
917	# define MGf_DUP 0	1291	# define MGf_DUP 0
918	#endif	1292	#endif
919	};	1293	};
920		1294
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	1295	static void
944	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1296	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
945	{	1297	{
946	ta->prev = SvSTATE (prev_sv);	1298	ta->prev = SvSTATE (prev_sv);
947	ta->next = SvSTATE (next_sv);	1299	ta->next = SvSTATE (next_sv);
		1300	TRANSFER_CHECK (*ta);
948	}	1301	}
949		1302
950	static void	1303	static void
951	api_transfer (SV *prev_sv, SV *next_sv)	1304	api_transfer (SV *prev_sv, SV *next_sv)
952	{	1305	{
		1306	dTHX;
953	struct transfer_args ta;	1307	struct transfer_args ta;
954		1308
955	prepare_transfer (&ta, prev_sv, next_sv);	1309	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
956	TRANSFER (ta);	1310	TRANSFER (ta);
957	}	1311	}
958		1312
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 ********************************************************************/	1313	/** Coro ********************************************************************/
972		1314
973	static void	1315	static void
974	coro_enq (SV *coro_sv)	1316	coro_enq (pTHX_ SV *coro_sv)
975	{	1317	{
976	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1318	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
977	}	1319	}
978		1320
979	static SV *	1321	static SV *
980	coro_deq (int min_prio)	1322	coro_deq (pTHX_ int min_prio)
981	{	1323	{
982	int prio = PRIO_MAX - PRIO_MIN;	1324	int prio = PRIO_MAX - PRIO_MIN;
983		1325
984	min_prio -= PRIO_MIN;	1326	min_prio -= PRIO_MIN;
985	if (min_prio < 0)	1327	if (min_prio < 0)
…		…
993	}	1335	}
994		1336
995	static int	1337	static int
996	api_ready (SV *coro_sv)	1338	api_ready (SV *coro_sv)
997	{	1339	{
		1340	dTHX;
998	struct coro *coro;	1341	struct coro *coro;
999		1342
1000	if (SvROK (coro_sv))	1343	if (SvROK (coro_sv))
1001	coro_sv = SvRV (coro_sv);	1344	coro_sv = SvRV (coro_sv);
1002		1345
…		…
1006	return 0;	1349	return 0;
1007		1350
1008	coro->flags |= CF_READY;	1351	coro->flags |= CF_READY;
1009		1352
1010	LOCK;	1353	LOCK;
1011	coro_enq (SvREFCNT_inc (coro_sv));	1354	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1012	++coro_nready;	1355	++coro_nready;
1013	UNLOCK;	1356	UNLOCK;
1014		1357
1015	return 1;	1358	return 1;
1016	}	1359	}
1017		1360
1018	static int	1361	static int
1019	api_is_ready (SV *coro_sv)	1362	api_is_ready (SV *coro_sv)
1020	{	1363	{
		1364	dTHX;
1021	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1365	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1022	}	1366	}
1023		1367
1024	static void	1368	static void
1025	prepare_schedule (struct transfer_args *ta)	1369	prepare_schedule (pTHX_ struct transfer_args *ta)
1026	{	1370	{
1027	SV *prev_sv, *next_sv;	1371	SV *prev_sv, *next_sv;
1028		1372
1029	for (;;)	1373	for (;;)
1030	{	1374	{
1031	LOCK;	1375	LOCK;
1032	next_sv = coro_deq (PRIO_MIN);	1376	next_sv = coro_deq (aTHX_ PRIO_MIN);
1033		1377
1034	/* nothing to schedule: call the idle handler */	1378	/* nothing to schedule: call the idle handler */
1035	if (!next_sv)	1379	if (expect_false (!next_sv))
1036	{	1380	{
1037	dSP;	1381	dSP;
1038	UNLOCK;	1382	UNLOCK;
1039		1383
1040	ENTER;	1384	ENTER;
…		…
1050	}	1394	}
1051		1395
1052	ta->next = SvSTATE (next_sv);	1396	ta->next = SvSTATE (next_sv);
1053		1397
1054	/* cannot transfer to destroyed coros, skip and look for next */	1398	/* cannot transfer to destroyed coros, skip and look for next */
1055	if (ta->next->flags & CF_DESTROYED)	1399	if (expect_false (ta->next->flags & CF_DESTROYED))
1056	{	1400	{
1057	UNLOCK;	1401	UNLOCK;
1058	SvREFCNT_dec (next_sv);	1402	SvREFCNT_dec (next_sv);
1059	/* coro_nready is already taken care of by destroy */	1403	/* coro_nready is already taken care of by destroy */
1060	continue;	1404	continue;
…		…
1065	break;	1409	break;
1066	}	1410	}
1067		1411
1068	/* free this only after the transfer */	1412	/* free this only after the transfer */
1069	prev_sv = SvRV (coro_current);	1413	prev_sv = SvRV (coro_current);
1070	SvRV_set (coro_current, next_sv);
1071	ta->prev = SvSTATE (prev_sv);	1414	ta->prev = SvSTATE (prev_sv);
1072		1415	TRANSFER_CHECK (*ta);
1073	assert (ta->next->flags & CF_READY);	1416	assert (ta->next->flags & CF_READY);
1074	ta->next->flags &= ~CF_READY;	1417	ta->next->flags &= ~CF_READY;
		1418	SvRV_set (coro_current, next_sv);
1075		1419
1076	LOCK;	1420	LOCK;
1077	free_coro_mortal ();	1421	free_coro_mortal (aTHX);
1078	coro_mortal = prev_sv;	1422	coro_mortal = prev_sv;
1079	UNLOCK;	1423	UNLOCK;
1080	}	1424	}
1081		1425
1082	static void	1426	static void
1083	prepare_cede (struct transfer_args *ta)	1427	prepare_cede (pTHX_ struct transfer_args *ta)
1084	{	1428	{
1085	api_ready (coro_current);	1429	api_ready (coro_current);
1086	prepare_schedule (ta);	1430	prepare_schedule (aTHX_ ta);
1087	}	1431	}
1088		1432
1089	static int	1433	static int
1090	prepare_cede_notself (struct transfer_args *ta)	1434	prepare_cede_notself (pTHX_ struct transfer_args *ta)
1091	{	1435	{
1092	if (coro_nready)	1436	if (coro_nready)
1093	{	1437	{
1094	SV *prev = SvRV (coro_current);	1438	SV *prev = SvRV (coro_current);
1095	prepare_schedule (ta);	1439	prepare_schedule (aTHX_ ta);
1096	api_ready (prev);	1440	api_ready (prev);
1097	return 1;	1441	return 1;
1098	}	1442	}
1099	else	1443	else
1100	return 0;	1444	return 0;
1101	}	1445	}
1102		1446
1103	static void	1447	static void
1104	api_schedule (void)	1448	api_schedule (void)
1105	{	1449	{
		1450	dTHX;
1106	struct transfer_args ta;	1451	struct transfer_args ta;
1107		1452
1108	prepare_schedule (&ta);	1453	prepare_schedule (aTHX_ &ta);
1109	TRANSFER (ta);	1454	TRANSFER (ta);
1110	}	1455	}
1111		1456
1112	static int	1457	static int
1113	api_cede (void)	1458	api_cede (void)
1114	{	1459	{
		1460	dTHX;
1115	struct transfer_args ta;	1461	struct transfer_args ta;
1116		1462
1117	prepare_cede (&ta);	1463	prepare_cede (aTHX_ &ta);
1118		1464
1119	if (ta.prev != ta.next)	1465	if (expect_true (ta.prev != ta.next))
1120	{	1466	{
1121	TRANSFER (ta);	1467	TRANSFER (ta);
1122	return 1;	1468	return 1;
1123	}	1469	}
1124	else	1470	else
…		…
1126	}	1472	}
1127		1473
1128	static int	1474	static int
1129	api_cede_notself (void)	1475	api_cede_notself (void)
1130	{	1476	{
		1477	dTHX;
1131	struct transfer_args ta;	1478	struct transfer_args ta;
1132		1479
1133	if (prepare_cede_notself (&ta))	1480	if (prepare_cede_notself (aTHX_ &ta))
1134	{	1481	{
1135	TRANSFER (ta);	1482	TRANSFER (ta);
1136	return 1;	1483	return 1;
1137	}	1484	}
1138	else	1485	else
1139	return 0;	1486	return 0;
1140	}	1487	}
1141		1488
		1489	static void
		1490	api_trace (SV *coro_sv, int flags)
		1491	{
		1492	dTHX;
		1493	struct coro *coro = SvSTATE (coro_sv);
		1494
		1495	if (flags & CC_TRACE)
		1496	{
		1497	if (!coro->cctx)
		1498	coro->cctx = cctx_new ();
		1499	else if (!(coro->cctx->flags & CC_TRACE))
		1500	croak ("cannot enable tracing on coroutine with custom stack");
		1501
		1502	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1503	}
		1504	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1505	{
		1506	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1507
		1508	if (coro->flags & CF_RUNNING)
		1509	PL_runops = RUNOPS_DEFAULT;
		1510	else
		1511	coro->slot->runops = RUNOPS_DEFAULT;
		1512	}
		1513	}
		1514
1142	MODULE = Coro::State PACKAGE = Coro::State	1515	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1143		1516
1144	PROTOTYPES: DISABLE	1517	PROTOTYPES: DISABLE
1145		1518
1146	BOOT:	1519	BOOT:
1147	{	1520	{
1148	#ifdef USE_ITHREADS	1521	#ifdef USE_ITHREADS
1149	MUTEX_INIT (&coro_mutex);	1522	MUTEX_INIT (&coro_mutex);
1150	#endif	1523	#endif
1151	BOOT_PAGESIZE;	1524	BOOT_PAGESIZE;
1152		1525
		1526	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1527	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1528
		1529	hv_sig = coro_get_hv ("SIG", TRUE);
		1530	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1531	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1532
		1533	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1534	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1535
1153	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1536	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1154		1537
		1538	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1539	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1155	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1540	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));	1541	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1160		1542
1161	main_mainstack = PL_mainstack;	1543	main_mainstack = PL_mainstack;
		1544	main_top_env = PL_top_env;
		1545
		1546	while (main_top_env->je_prev)
		1547	main_top_env = main_top_env->je_prev;
1162		1548
1163	coroapi.ver = CORO_API_VERSION;	1549	coroapi.ver = CORO_API_VERSION;
		1550	coroapi.rev = CORO_API_REVISION;
1164	coroapi.transfer = api_transfer;	1551	coroapi.transfer = api_transfer;
1165		1552
1166	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1553	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1167	}	1554	}
1168		1555
…		…
1173	struct coro *coro;	1560	struct coro *coro;
1174	HV *hv;	1561	HV *hv;
1175	int i;	1562	int i;
1176		1563
1177	Newz (0, coro, 1, struct coro);	1564	Newz (0, coro, 1, struct coro);
1178	coro->args = newAV ();	1565	coro->args = newAV ();
1179	coro->save = CORO_SAVE_ALL;
1180	coro->flags = CF_NEW;	1566	coro->flags = CF_NEW;
1181		1567
		1568	if (coro_first) coro_first->prev = coro;
		1569	coro->next = coro_first;
		1570	coro_first = coro;
		1571
1182	hv = newHV ();	1572	coro->hv = hv = newHV ();
1183	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1573	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1184	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1574	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1185		1575
		1576	av_extend (coro->args, items - 1);
1186	for (i = 1; i < items; i++)	1577	for (i = 1; i < items; i++)
1187	av_push (coro->args, newSVsv (ST (i)));	1578	av_push (coro->args, newSVsv (ST (i)));
1188	}	1579	}
1189	OUTPUT:	1580	OUTPUT:
1190	RETVAL	1581	RETVAL
1191		1582
1192	int	1583	# these not obviously related functions are all rolled into the same xs
1193	save (SV *coro, int new_save = -1)	1584	# function to increase chances that they all will call transfer with the same
1194	CODE:	1585	# stack offset
1195	RETVAL = api_save (coro, new_save);
1196	OUTPUT:
1197	RETVAL
1198
1199	void	1586	void
1200	_set_stacklevel (...)	1587	_set_stacklevel (...)
1201	ALIAS:	1588	ALIAS:
1202	Coro::State::transfer = 1	1589	Coro::State::transfer = 1
1203	Coro::schedule = 2	1590	Coro::schedule = 2
…		…
1216		1603
1217	case 1:	1604	case 1:
1218	if (items != 2)	1605	if (items != 2)
1219	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1606	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1220		1607
1221	prepare_transfer (&ta, ST (0), ST (1));	1608	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1222	break;	1609	break;
1223		1610
1224	case 2:	1611	case 2:
1225	prepare_schedule (&ta);	1612	prepare_schedule (aTHX_ &ta);
1226	break;	1613	break;
1227		1614
1228	case 3:	1615	case 3:
1229	prepare_cede (&ta);	1616	prepare_cede (aTHX_ &ta);
1230	break;	1617	break;
1231		1618
1232	case 4:	1619	case 4:
1233	if (!prepare_cede_notself (&ta))	1620	if (!prepare_cede_notself (aTHX_ &ta))
1234	XSRETURN_EMPTY;	1621	XSRETURN_EMPTY;
1235		1622
1236	break;	1623	break;
1237	}	1624	}
1238		1625
1239	BARRIER;	1626	BARRIER;
		1627	PUTBACK;
1240	TRANSFER (ta);	1628	TRANSFER (ta);
1241		1629	SPAGAIN; /* might be the sp of a different coroutine now */
1242	if (GIMME_V != G_VOID && ta.next != ta.prev)	1630	/* be extra careful not to ever do anything after TRANSFER */
1243	XSRETURN_YES;
1244	}	1631	}
1245		1632
1246	bool	1633	bool
1247	_destroy (SV *coro_sv)	1634	_destroy (SV *coro_sv)
1248	CODE:	1635	CODE:
1249	RETVAL = coro_state_destroy (SvSTATE (coro_sv));	1636	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1250	OUTPUT:	1637	OUTPUT:
1251	RETVAL	1638	RETVAL
1252		1639
1253	void	1640	void
1254	_exit (code)	1641	_exit (code)
…		…
1256	PROTOTYPE: $	1643	PROTOTYPE: $
1257	CODE:	1644	CODE:
1258	_exit (code);	1645	_exit (code);
1259		1646
1260	int	1647	int
		1648	cctx_stacksize (int new_stacksize = 0)
		1649	CODE:
		1650	RETVAL = coro_stacksize;
		1651	if (new_stacksize)
		1652	coro_stacksize = new_stacksize;
		1653	OUTPUT:
		1654	RETVAL
		1655
		1656	int
1261	cctx_count ()	1657	cctx_count ()
1262	CODE:	1658	CODE:
1263	RETVAL = cctx_count;	1659	RETVAL = cctx_count;
1264	OUTPUT:	1660	OUTPUT:
1265	RETVAL	1661	RETVAL
1266		1662
1267	int	1663	int
1268	cctx_idle ()	1664	cctx_idle ()
1269	CODE:	1665	CODE:
1270	RETVAL = cctx_idle;	1666	RETVAL = cctx_idle[0] + cctx_idle[1] + cctx_idle[2];
1271	OUTPUT:	1667	OUTPUT:
1272	RETVAL	1668	RETVAL
1273		1669
		1670	void
		1671	list ()
		1672	PPCODE:
		1673	{
		1674	struct coro *coro;
		1675	for (coro = coro_first; coro; coro = coro->next)
		1676	if (coro->hv)
		1677	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1678	}
		1679
		1680	void
		1681	call (Coro::State coro, SV *coderef)
		1682	ALIAS:
		1683	eval = 1
		1684	CODE:
		1685	{
		1686	if (coro->mainstack)
		1687	{
		1688	struct coro temp;
		1689
		1690	if (!(coro->flags & CF_RUNNING))
		1691	{
		1692	save_perl (aTHX_ &temp);
		1693	load_perl (aTHX_ coro);
		1694	}
		1695
		1696	{
		1697	dSP;
		1698	ENTER;
		1699	SAVETMPS;
		1700	PUTBACK;
		1701	PUSHSTACK;
		1702	PUSHMARK (SP);
		1703
		1704	if (ix)
		1705	eval_sv (coderef, 0);
		1706	else
		1707	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1708
		1709	POPSTACK;
		1710	FREETMPS;
		1711	LEAVE;
		1712	PUTBACK;
		1713	}
		1714
		1715	if (!(coro->flags & CF_RUNNING))
		1716	{
		1717	save_perl (aTHX_ coro);
		1718	load_perl (aTHX_ &temp);
		1719	}
		1720	}
		1721	}
		1722
		1723	SV *
		1724	is_ready (Coro::State coro)
		1725	PROTOTYPE: $
		1726	ALIAS:
		1727	is_ready = CF_READY
		1728	is_running = CF_RUNNING
		1729	is_new = CF_NEW
		1730	is_destroyed = CF_DESTROYED
		1731	CODE:
		1732	RETVAL = boolSV (coro->flags & ix);
		1733	OUTPUT:
		1734	RETVAL
		1735
		1736	void
		1737	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1738
		1739	SV *
		1740	has_stack (Coro::State coro)
		1741	PROTOTYPE: $
		1742	CODE:
		1743	RETVAL = boolSV (!!coro->cctx);
		1744	OUTPUT:
		1745	RETVAL
		1746
		1747	int
		1748	is_traced (Coro::State coro)
		1749	PROTOTYPE: $
		1750	CODE:
		1751	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1752	OUTPUT:
		1753	RETVAL
		1754
		1755	IV
		1756	rss (Coro::State coro)
		1757	PROTOTYPE: $
		1758	ALIAS:
		1759	usecount = 1
		1760	CODE:
		1761	switch (ix)
		1762	{
		1763	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1764	case 1: RETVAL = coro->usecount; break;
		1765	}
		1766	OUTPUT:
		1767	RETVAL
		1768
		1769
1274	MODULE = Coro::State PACKAGE = Coro	1770	MODULE = Coro::State PACKAGE = Coro
1275		1771
1276	BOOT:	1772	BOOT:
1277	{	1773	{
1278	int i;	1774	int i;
1279		1775
		1776	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1777	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1778	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1779
		1780	coro_current = coro_get_sv ("Coro::current", FALSE);
		1781	SvREADONLY_on (coro_current);
		1782
1280	coro_stash = gv_stashpv ("Coro", TRUE);	1783	coro_stash = gv_stashpv ("Coro", TRUE);
1281		1784
1282	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1785	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1283	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1786	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1284	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1787	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1285	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1788	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1286	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1789	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1287	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1790	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1288		1791
1289	coro_current = get_sv ("Coro::current", FALSE);
1290	SvREADONLY_on (coro_current);
1291
1292	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1792	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1293	coro_ready[i] = newAV ();	1793	coro_ready[i] = newAV ();
1294		1794
1295	{	1795	{
1296	SV *sv = perl_get_sv("Coro::API", 1);	1796	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1797	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1297		1798
1298	coroapi.schedule = api_schedule;	1799	coroapi.schedule = api_schedule;
1299	coroapi.save = api_save;
1300	coroapi.cede = api_cede;	1800	coroapi.cede = api_cede;
1301	coroapi.cede_notself = api_cede_notself;	1801	coroapi.cede_notself = api_cede_notself;
1302	coroapi.ready = api_ready;	1802	coroapi.ready = api_ready;
1303	coroapi.is_ready = api_is_ready;	1803	coroapi.is_ready = api_is_ready;
1304	coroapi.nready = &coro_nready;	1804	coroapi.nready = &coro_nready;
…		…
1345	CODE:	1845	CODE:
1346	RETVAL = boolSV (api_ready (self));	1846	RETVAL = boolSV (api_ready (self));
1347	OUTPUT:	1847	OUTPUT:
1348	RETVAL	1848	RETVAL
1349		1849
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	1850	int
1359	nready (...)	1851	nready (...)
1360	PROTOTYPE:	1852	PROTOTYPE:
1361	CODE:	1853	CODE:
1362	RETVAL = coro_nready;	1854	RETVAL = coro_nready;
1363	OUTPUT:	1855	OUTPUT:
1364	RETVAL	1856	RETVAL
1365		1857
		1858	void
		1859	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1860	PROTOTYPE: $;$
		1861	CODE:
		1862	SvREFCNT_dec (self->throw);
		1863	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1864
		1865	# for async_pool speedup
		1866	void
		1867	_pool_1 (SV *cb)
		1868	CODE:
		1869	{
		1870	struct coro *coro = SvSTATE (coro_current);
		1871	HV *hv = (HV *)SvRV (coro_current);
		1872	AV *defav = GvAV (PL_defgv);
		1873	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1874	AV *invoke_av;
		1875	int i, len;
		1876
		1877	if (!invoke)
		1878	croak ("\3async_pool terminate\2\n");
		1879
		1880	SvREFCNT_dec (coro->saved_deffh);
		1881	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1882
		1883	hv_store (hv, "desc", sizeof ("desc") - 1,
		1884	newSVpvn (strpair ("[async_pool]")), 0);
		1885
		1886	invoke_av = (AV *)SvRV (invoke);
		1887	len = av_len (invoke_av);
		1888
		1889	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1890
		1891	if (len > 0)
		1892	{
		1893	av_fill (defav, len - 1);
		1894	for (i = 0; i < len; ++i)
		1895	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1896	}
		1897
		1898	SvREFCNT_dec (invoke);
		1899	}
		1900
		1901	void
		1902	_pool_2 (SV *cb)
		1903	CODE:
		1904	{
		1905	struct coro *coro = SvSTATE (coro_current);
		1906
		1907	sv_setsv (cb, &PL_sv_undef);
		1908
		1909	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1910	coro->saved_deffh = 0;
		1911
		1912	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1913	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1914	croak ("\3async_pool terminate\2\n");
		1915
		1916	av_clear (GvAV (PL_defgv));
		1917	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1918	newSVpvn (strpair ("[async_pool idle]")), 0);
		1919
		1920	coro->prio = 0;
		1921
		1922	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1923	api_trace (coro_current, 0);
		1924
		1925	av_push (av_async_pool, newSVsv (coro_current));
		1926	}
		1927
		1928
1366	MODULE = Coro::State PACKAGE = Coro::AIO	1929	MODULE = Coro::State PACKAGE = Coro::AIO
1367		1930
1368	SV *	1931	SV *
1369	_get_state ()	1932	_get_state ()
1370	CODE:	1933	CODE:

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