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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.162 by root, Sun Sep 23 21:49:58 2007 UTC vs.
Revision 1.227 by root, Sat Apr 5 22:29:54 2008 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
2		2
3	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
4		5
5	#include "EXTERN.h"	6	#include "EXTERN.h"
6	#include "perl.h"	7	#include "perl.h"
7	#include "XSUB.h"	8	#include "XSUB.h"
8		9
9	#include "patchlevel.h"	10	#include "patchlevel.h"
10		11
11	#include <stdio.h>	12	#include <stdio.h>
12	#include <errno.h>	13	#include <errno.h>
13	#include <assert.h>	14	#include <assert.h>
		15	#include <inttypes.h> /* portable stdint.h */
14		16
15	#ifdef HAVE_MMAP	17	#ifdef HAVE_MMAP
16	# include <unistd.h>	18	# include <unistd.h>
17	# include <sys/mman.h>	19	# include <sys/mman.h>
18	# ifndef MAP_ANONYMOUS	20	# ifndef MAP_ANONYMOUS
…		…
70	# ifndef IS_PADCONST	72	# ifndef IS_PADCONST
71	# define IS_PADCONST(v) 0	73	# define IS_PADCONST(v) 0
72	# endif	74	# endif
73	#endif	75	#endif
74		76
		77	/* 5.8.8 */
		78	#ifndef GV_NOTQUAL
		79	# define GV_NOTQUAL 0
		80	#endif
		81	#ifndef newSV
		82	# define newSV(l) NEWSV(0,l)
		83	#endif
		84
		85	/* 5.11 */
		86	#ifndef CxHASARGS
		87	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		88	#endif
		89
75	/* 5.8.7 */	90	/* 5.8.7 */
76	#ifndef SvRV_set	91	#ifndef SvRV_set
77	# define SvRV_set(s,v) SvRV(s) = (v)	92	# define SvRV_set(s,v) SvRV(s) = (v)
78	#endif	93	#endif
79		94
…		…
98	#define IN_DESTRUCT (PL_main_cv == Nullcv)	113	#define IN_DESTRUCT (PL_main_cv == Nullcv)
99		114
100	#if __GNUC__ >= 3	115	#if __GNUC__ >= 3
101	# define attribute(x) __attribute__(x)	116	# define attribute(x) __attribute__(x)
102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	117	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		118	# define expect(expr,value) __builtin_expect ((expr),(value))
103	#else	119	#else
104	# define attribute(x)	120	# define attribute(x)
105	# define BARRIER	121	# define BARRIER
		122	# define expect(expr,value) (expr)
106	#endif	123	#endif
		124
		125	#define expect_false(expr) expect ((expr) != 0, 0)
		126	#define expect_true(expr) expect ((expr) != 0, 1)
107		127
108	#define NOINLINE attribute ((noinline))	128	#define NOINLINE attribute ((noinline))
109		129
110	#include "CoroAPI.h"	130	#include "CoroAPI.h"
111		131
…		…
130	static size_t coro_stacksize = CORO_STACKSIZE;	150	static size_t coro_stacksize = CORO_STACKSIZE;
131	static struct CoroAPI coroapi;	151	static struct CoroAPI coroapi;
132	static AV *main_mainstack; /* used to differentiate between $main and others */	152	static AV *main_mainstack; /* used to differentiate between $main and others */
133	static JMPENV *main_top_env;	153	static JMPENV *main_top_env;
134	static HV *coro_state_stash, *coro_stash;	154	static HV *coro_state_stash, *coro_stash;
135	static SV *coro_mortal; /* will be freed after next transfer */	155	static volatile SV *coro_mortal; /* will be freed after next transfer */
		156
		157	static GV *irsgv; /* $/ */
		158	static GV *stdoutgv; /* *STDOUT */
		159	static SV *rv_diehook;
		160	static SV *rv_warnhook;
		161	static HV *hv_sig; /* %SIG */
136		162
137	/* async_pool helper stuff */	163	/* async_pool helper stuff */
138	static SV *sv_pool_rss;	164	static SV *sv_pool_rss;
139	static SV *sv_pool_size;	165	static SV *sv_pool_size;
140	static AV *av_async_pool;	166	static AV *av_async_pool;
141		167
142	static struct coro_cctx *cctx_first;	168	static struct coro_cctx *cctx_first;
143	static int cctx_count, cctx_idle;	169	static int cctx_count, cctx_idle;
		170
		171	enum {
		172	CC_MAPPED = 0x01,
		173	CC_NOREUSE = 0x02, /* throw this away after tracing */
		174	CC_TRACE = 0x04,
		175	CC_TRACE_SUB = 0x08, /* trace sub calls */
		176	CC_TRACE_LINE = 0x10, /* trace each statement */
		177	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		178	};
144		179
145	/* this is a structure representing a c-level coroutine */	180	/* this is a structure representing a c-level coroutine */
146	typedef struct coro_cctx {	181	typedef struct coro_cctx {
147	struct coro_cctx *next;	182	struct coro_cctx *next;
148		183
…		…
157	coro_context cctx;	192	coro_context cctx;
158		193
159	#if CORO_USE_VALGRIND	194	#if CORO_USE_VALGRIND
160	int valgrind_id;	195	int valgrind_id;
161	#endif	196	#endif
162	char inuse, mapped;	197	unsigned char flags;
163	} coro_cctx;	198	} coro_cctx;
164		199
165	enum {	200	enum {
166	CF_RUNNING = 0x0001, /* coroutine is running */	201	CF_RUNNING = 0x0001, /* coroutine is running */
167	CF_READY = 0x0002, /* coroutine is ready */	202	CF_READY = 0x0002, /* coroutine is ready */
168	CF_NEW = 0x0004, /* has never been switched to */	203	CF_NEW = 0x0004, /* has never been switched to */
169	CF_DESTROYED = 0x0008, /* coroutine data has been freed */	204	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
170	};	205	};
171		206
		207	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		208	typedef struct {
		209	SV *defsv;
		210	AV *defav;
		211	SV *errsv;
		212	SV *irsgv;
		213	#define VAR(name,type) type name;
		214	# include "state.h"
		215	#undef VAR
		216	} perl_slots;
		217
		218	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		219
172	/* this is a structure representing a perl-level coroutine */	220	/* this is a structure representing a perl-level coroutine */
173	struct coro {	221	struct coro {
174	/* the c coroutine allocated to this perl coroutine, if any */	222	/* the c coroutine allocated to this perl coroutine, if any */
175	coro_cctx *cctx;	223	coro_cctx *cctx;
176		224
		225	/* process data */
		226	AV *mainstack;
		227	perl_slots *slot; /* basically the saved sp */
		228
177	/* data associated with this coroutine (initial args) */	229	AV *args; /* data associated with this coroutine (initial args) */
178	AV *args;	230	int refcnt; /* coroutines are refcounted, yes */
179	int refcnt;
180	int save; /* CORO_SAVE flags */
181	int flags; /* CF_ flags */	231	int flags; /* CF_ flags */
		232	HV *hv; /* the perl hash associated with this coro, if any */
182		233
183	/* optionally saved, might be zero */	234	/* statistics */
184	AV *defav; /* @_ */	235	int usecount; /* number of transfers to this coro */
185	SV *defsv; /* $_ */
186	SV *errsv; /* $@ */
187	GV *deffh; /* default filehandle */
188	SV *irssv; /* $/ */
189	SV *irssv_sv; /* real $/ cache */
190
191	#define VAR(name,type) type name;
192	# include "state.h"
193	#undef VAR
194		236
195	/* coro process data */	237	/* coro process data */
196	int prio;	238	int prio;
		239	SV *throw; /* exception to be thrown */
		240
		241	/* async_pool */
		242	SV *saved_deffh;
197		243
198	/* linked list */	244	/* linked list */
199	struct coro *next, *prev;	245	struct coro *next, *prev;
200	HV *hv; /* the perl hash associated with this coro, if any */
201	};	246	};
202		247
203	typedef struct coro *Coro__State;	248	typedef struct coro *Coro__State;
204	typedef struct coro *Coro__State_or_hashref;	249	typedef struct coro *Coro__State_or_hashref;
205		250
…		…
217	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	262	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
218	static int coro_nready;	263	static int coro_nready;
219	static struct coro *coro_first;	264	static struct coro *coro_first;
220		265
221	/** lowlevel stuff **********************************************************/	266	/** lowlevel stuff **********************************************************/
		267
		268	static SV *
		269	coro_get_sv (pTHX_ const char *name, int create)
		270	{
		271	#if PERL_VERSION_ATLEAST (5,9,0)
		272	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		273	get_sv (name, create);
		274	#endif
		275	return get_sv (name, create);
		276	}
		277
		278	static AV *
		279	coro_get_av (pTHX_ const char *name, int create)
		280	{
		281	#if PERL_VERSION_ATLEAST (5,9,0)
		282	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		283	get_av (name, create);
		284	#endif
		285	return get_av (name, create);
		286	}
		287
		288	static HV *
		289	coro_get_hv (pTHX_ const char *name, int create)
		290	{
		291	#if PERL_VERSION_ATLEAST (5,9,0)
		292	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		293	get_hv (name, create);
		294	#endif
		295	return get_hv (name, create);
		296	}
222		297
223	static AV *	298	static AV *
224	coro_clone_padlist (pTHX_ CV *cv)	299	coro_clone_padlist (pTHX_ CV *cv)
225	{	300	{
226	AV *padlist = CvPADLIST (cv);	301	AV *padlist = CvPADLIST (cv);
…		…
274		349
275	/* casting is fun. */	350	/* casting is fun. */
276	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	351	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277	free_padlist (aTHX_ padlist);	352	free_padlist (aTHX_ padlist);
278		353
279	SvREFCNT_dec (av);
280
281	return 0;	354	return 0;
282	}	355	}
283		356
284	#define PERL_MAGIC_coro PERL_MAGIC_ext	357	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		358	#define CORO_MAGIC_type_state PERL_MAGIC_ext
285		359
286	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	360	static MGVTBL coro_cv_vtbl = {
		361	0, 0, 0, 0,
		362	coro_cv_free
		363	};
287		364
288	#define CORO_MAGIC(cv) \	365	#define CORO_MAGIC(sv,type) \
289	SvMAGIC (cv) \	366	SvMAGIC (sv) \
290	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	367	? SvMAGIC (sv)->mg_type == type \
291	? SvMAGIC (cv) \	368	? SvMAGIC (sv) \
292	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	369	: mg_find (sv, type) \
293	: 0	370	: 0
		371
		372	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		373	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		374
		375	static struct coro *
		376	SvSTATE_ (pTHX_ SV *coro)
		377	{
		378	HV *stash;
		379	MAGIC *mg;
		380
		381	if (SvROK (coro))
		382	coro = SvRV (coro);
		383
		384	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		385	croak ("Coro::State object required");
		386
		387	stash = SvSTASH (coro);
		388	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		389	{
		390	/* very slow, but rare, check */
		391	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		392	croak ("Coro::State object required");
		393	}
		394
		395	mg = CORO_MAGIC_state (coro);
		396	return (struct coro *)mg->mg_ptr;
		397	}
		398
		399	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
294		400
295	/* the next two functions merely cache the padlists */	401	/* the next two functions merely cache the padlists */
296	static void	402	static void
297	get_padlist (pTHX_ CV *cv)	403	get_padlist (pTHX_ CV *cv)
298	{	404	{
299	MAGIC *mg = CORO_MAGIC (cv);	405	MAGIC *mg = CORO_MAGIC_cv (cv);
300	AV *av;	406	AV *av;
301		407
302	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	408	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
303	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	409	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
304	else	410	else
305	{	411	{
306	#if CORO_PREFER_PERL_FUNCTIONS	412	#if CORO_PREFER_PERL_FUNCTIONS
307	/* this is probably cleaner, but also slower? */	413	/* this is probably cleaner, but also slower? */
…		…
316	}	422	}
317		423
318	static void	424	static void
319	put_padlist (pTHX_ CV *cv)	425	put_padlist (pTHX_ CV *cv)
320	{	426	{
321	MAGIC *mg = CORO_MAGIC (cv);	427	MAGIC *mg = CORO_MAGIC_cv (cv);
322	AV *av;	428	AV *av;
323		429
324	if (!mg)	430	if (expect_false (!mg))
325	{	431	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
326	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
327	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
328	mg->mg_virtual = &vtbl_coro;
329	mg->mg_obj = (SV *)newAV ();
330	}
331		432
332	av = (AV *)mg->mg_obj;	433	av = (AV *)mg->mg_obj;
333		434
334	if (AvFILLp (av) >= AvMAX (av))	435	if (expect_false (AvFILLp (av) >= AvMAX (av)))
335	av_extend (av, AvMAX (av) + 1);	436	av_extend (av, AvMAX (av) + 1);
336		437
337	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	438	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
338	}	439	}
339		440
340	/** load & save, init *******************************************************/	441	/** load & save, init *******************************************************/
341
342	#define SB do {
343	#define SE } while (0)
344
345	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
346		442
347	static void	443	static void
348	load_perl (pTHX_ Coro__State c)	444	load_perl (pTHX_ Coro__State c)
349	{	445	{
		446	perl_slots *slot = c->slot;
		447	c->slot = 0;
		448
		449	PL_mainstack = c->mainstack;
		450
		451	GvSV (PL_defgv) = slot->defsv;
		452	GvAV (PL_defgv) = slot->defav;
		453	GvSV (PL_errgv) = slot->errsv;
		454	GvSV (irsgv) = slot->irsgv;
		455
350	#define VAR(name,type) PL_ ## name = c->name;	456	#define VAR(name,type) PL_ ## name = slot->name;
351	# include "state.h"	457	# include "state.h"
352	#undef VAR	458	#undef VAR
353
354	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
355	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
356	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
357	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
358
359	if (c->irssv)
360	{
361	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
362	{
363	SvREFCNT_dec (c->irssv);
364	c->irssv = 0;
365	}
366	else
367	{
368	REPLACE_SV (PL_rs, c->irssv);
369	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
370	sv_setsv (c->irssv_sv, PL_rs);
371	}
372	}
373		459
374	{	460	{
375	dSP;	461	dSP;
		462
376	CV *cv;	463	CV *cv;
377		464
378	/* now do the ugly restore mess */	465	/* now do the ugly restore mess */
379	while ((cv = (CV *)POPs))	466	while (expect_true (cv = (CV *)POPs))
380	{	467	{
381	put_padlist (aTHX_ cv); /* mark this padlist as available */	468	put_padlist (aTHX_ cv); /* mark this padlist as available */
382	CvDEPTH (cv) = PTR2IV (POPs);	469	CvDEPTH (cv) = PTR2IV (POPs);
383	CvPADLIST (cv) = (AV *)POPs;	470	CvPADLIST (cv) = (AV *)POPs;
384	}	471	}
…		…
403		490
404	XPUSHs (Nullsv);	491	XPUSHs (Nullsv);
405	/* this loop was inspired by pp_caller */	492	/* this loop was inspired by pp_caller */
406	for (;;)	493	for (;;)
407	{	494	{
408	while (cxix >= 0)	495	while (expect_true (cxix >= 0))
409	{	496	{
410	PERL_CONTEXT *cx = &ccstk[cxix--];	497	PERL_CONTEXT *cx = &ccstk[cxix--];
411		498
412	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)	499	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
413	{	500	{
414	CV *cv = cx->blk_sub.cv;	501	CV *cv = cx->blk_sub.cv;
415		502
416	if (CvDEPTH (cv))	503	if (expect_true (CvDEPTH (cv)))
417	{	504	{
418	EXTEND (SP, 3);	505	EXTEND (SP, 3);
419	PUSHs ((SV *)CvPADLIST (cv));	506	PUSHs ((SV *)CvPADLIST (cv));
420	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	507	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
421	PUSHs ((SV *)cv);	508	PUSHs ((SV *)cv);
…		…
424	get_padlist (aTHX_ cv);	511	get_padlist (aTHX_ cv);
425	}	512	}
426	}	513	}
427	}	514	}
428		515
429	if (top_si->si_type == PERLSI_MAIN)	516	if (expect_true (top_si->si_type == PERLSI_MAIN))
430	break;	517	break;
431		518
432	top_si = top_si->si_prev;	519	top_si = top_si->si_prev;
433	ccstk = top_si->si_cxstack;	520	ccstk = top_si->si_cxstack;
434	cxix = top_si->si_cxix;	521	cxix = top_si->si_cxix;
435	}	522	}
436		523
437	PUTBACK;	524	PUTBACK;
438	}	525	}
439		526
440	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	527	/* allocate some space on the context stack for our purposes */
441	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	528	/* we manually unroll here, as usually 2 slots is enough */
442	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	529	if (SLOT_COUNT >= 1) CXINC;
443	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;	530	if (SLOT_COUNT >= 2) CXINC;
444	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	531	if (SLOT_COUNT >= 3) CXINC;
		532	{
		533	int i;
		534	for (i = 3; i < SLOT_COUNT; ++i)
		535	CXINC;
		536	}
		537	cxstack_ix -= SLOT_COUNT; /* undo allocation */
445		538
		539	c->mainstack = PL_mainstack;
		540
		541	{
		542	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
		543
		544	slot->defav = GvAV (PL_defgv);
		545	slot->defsv = DEFSV;
		546	slot->errsv = ERRSV;
		547	slot->irsgv = GvSV (irsgv);
		548
446	#define VAR(name,type)c->name = PL_ ## name;	549	#define VAR(name,type) slot->name = PL_ ## name;
447	# include "state.h"	550	# include "state.h"
448	#undef VAR	551	#undef VAR
		552	}
449	}	553	}
450		554
451	/*	555	/*
452	* allocate various perl stacks. This is an exact copy	556	* allocate various perl stacks. This is an exact copy
453	* of perl.c:init_stacks, except that it uses less memory	557	* of perl.c:init_stacks, except that it uses less memory
…		…
458	# define coro_init_stacks init_stacks	562	# define coro_init_stacks init_stacks
459	#else	563	#else
460	static void	564	static void
461	coro_init_stacks (pTHX)	565	coro_init_stacks (pTHX)
462	{	566	{
463	PL_curstackinfo = new_stackinfo(64, 6);	567	PL_curstackinfo = new_stackinfo(32, 8);
464	PL_curstackinfo->si_type = PERLSI_MAIN;	568	PL_curstackinfo->si_type = PERLSI_MAIN;
465	PL_curstack = PL_curstackinfo->si_stack;	569	PL_curstack = PL_curstackinfo->si_stack;
466	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	570	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
467		571
468	PL_stack_base = AvARRAY(PL_curstack);	572	PL_stack_base = AvARRAY(PL_curstack);
469	PL_stack_sp = PL_stack_base;	573	PL_stack_sp = PL_stack_base;
470	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	574	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
471		575
472	New(50,PL_tmps_stack,64,SV*);	576	New(50,PL_tmps_stack,32,SV*);
473	PL_tmps_floor = -1;	577	PL_tmps_floor = -1;
474	PL_tmps_ix = -1;	578	PL_tmps_ix = -1;
475	PL_tmps_max = 64;	579	PL_tmps_max = 32;
476		580
477	New(54,PL_markstack,16,I32);	581	New(54,PL_markstack,16,I32);
478	PL_markstack_ptr = PL_markstack;	582	PL_markstack_ptr = PL_markstack;
479	PL_markstack_max = PL_markstack + 16;	583	PL_markstack_max = PL_markstack + 16;
480		584
481	#ifdef SET_MARK_OFFSET	585	#ifdef SET_MARK_OFFSET
482	SET_MARK_OFFSET;	586	SET_MARK_OFFSET;
483	#endif	587	#endif
484		588
485	New(54,PL_scopestack,16,I32);	589	New(54,PL_scopestack,8,I32);
486	PL_scopestack_ix = 0;	590	PL_scopestack_ix = 0;
487	PL_scopestack_max = 16;	591	PL_scopestack_max = 8;
488		592
489	New(54,PL_savestack,64,ANY);	593	New(54,PL_savestack,24,ANY);
490	PL_savestack_ix = 0;	594	PL_savestack_ix = 0;
491	PL_savestack_max = 64;	595	PL_savestack_max = 24;
492		596
493	#if !PERL_VERSION_ATLEAST (5,9,0)	597	#if !PERL_VERSION_ATLEAST (5,9,0)
494	New(54,PL_retstack,4,OP*);	598	New(54,PL_retstack,4,OP*);
495	PL_retstack_ix = 0;	599	PL_retstack_ix = 0;
496	PL_retstack_max = 4;	600	PL_retstack_max = 4;
…		…
502	* destroy the stacks, the callchain etc...	606	* destroy the stacks, the callchain etc...
503	*/	607	*/
504	static void	608	static void
505	coro_destroy_stacks (pTHX)	609	coro_destroy_stacks (pTHX)
506	{	610	{
507	if (!IN_DESTRUCT)
508	{
509	/* restore all saved variables and stuff */
510	LEAVE_SCOPE (0);
511	assert (PL_tmps_floor == -1);
512
513	/* free all temporaries */
514	FREETMPS;
515	assert (PL_tmps_ix == -1);
516
517	/* unwind all extra stacks */
518	POPSTACK_TO (PL_mainstack);
519
520	/* unwind main stack */
521	dounwind (-1);
522	}
523
524	while (PL_curstackinfo->si_next)	611	while (PL_curstackinfo->si_next)
525	PL_curstackinfo = PL_curstackinfo->si_next;	612	PL_curstackinfo = PL_curstackinfo->si_next;
526		613
527	while (PL_curstackinfo)	614	while (PL_curstackinfo)
528	{	615	{
…		…
544	Safefree (PL_retstack);	631	Safefree (PL_retstack);
545	#endif	632	#endif
546	}	633	}
547		634
548	static size_t	635	static size_t
549	coro_rss (struct coro *coro)	636	coro_rss (pTHX_ struct coro *coro)
550	{	637	{
551	size_t rss = sizeof (coro);	638	size_t rss = sizeof (*coro);
552		639
553	if (coro->mainstack)	640	if (coro->mainstack)
554	{	641	{
		642	perl_slots tmp_slot;
		643	perl_slots *slot;
		644
555	if (coro->flags & CF_RUNNING)	645	if (coro->flags & CF_RUNNING)
556	{	646	{
		647	slot = &tmp_slot;
		648
557	#define VAR(name,type)coro->name = PL_ ## name;	649	#define VAR(name,type) slot->name = PL_ ## name;
558	# include "state.h"	650	# include "state.h"
559	#undef VAR	651	#undef VAR
560	}	652	}
		653	else
		654	slot = coro->slot;
561		655
562	rss += sizeof (coro->curstackinfo);	656	rss += sizeof (slot->curstackinfo);
563	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
564	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);	657	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
565	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);	658	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
566	rss += coro->tmps_max * sizeof (SV *);	659	rss += slot->tmps_max * sizeof (SV *);
567	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);	660	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
568	rss += coro->scopestack_max * sizeof (I32);	661	rss += slot->scopestack_max * sizeof (I32);
569	rss += coro->savestack_max * sizeof (ANY);	662	rss += slot->savestack_max * sizeof (ANY);
570		663
571	#if !PERL_VERSION_ATLEAST (5,9,0)	664	#if !PERL_VERSION_ATLEAST (5,9,0)
572	rss += coro->retstack_max * sizeof (OP *);	665	rss += slot->retstack_max * sizeof (OP *);
573	#endif	666	#endif
574	}	667	}
575		668
576	return rss;	669	return rss;
577	}	670	}
578		671
579	/** coroutine stack handling ************************************************/	672	/** coroutine stack handling ************************************************/
580		673
		674	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		675	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		676
		677	/*
		678	* This overrides the default magic get method of %SIG elements.
		679	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		680	* and instead of tryign to save and restore the hash elements, we just provide
		681	* readback here.
		682	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		683	* not expecting this to actually change the hook. This is a potential problem
		684	* when a schedule happens then, but we ignore this.
		685	*/
		686	static int
		687	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		688	{
		689	const char *s = MgPV_nolen_const (mg);
		690
		691	if (*s == '_')
		692	{
		693	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		694	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		695	}
		696
		697	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		698	}
		699
		700	static int
		701	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		702	{
		703	const char *s = MgPV_nolen_const (mg);
		704
		705	if (*s == '_')
		706	{
		707	SV **svp = 0;
		708
		709	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		710	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		711
		712	if (svp)
		713	{
		714	SV *old = *svp;
		715	*svp = newSVsv (sv);
		716	SvREFCNT_dec (old);
		717	return;
		718	}
		719	}
		720
		721	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		722	}
		723
581	static void	724	static void
582	setup_coro (pTHX_ struct coro *coro)	725	coro_setup (pTHX_ struct coro *coro)
583	{	726	{
584	/*	727	/*
585	* emulate part of the perl startup here.	728	* emulate part of the perl startup here.
586	*/	729	*/
587	coro_init_stacks (aTHX);	730	coro_init_stacks (aTHX);
588		731
		732	PL_runops = RUNOPS_DEFAULT;
589	PL_curcop = &PL_compiling;	733	PL_curcop = &PL_compiling;
590	PL_in_eval = EVAL_NULL;	734	PL_in_eval = EVAL_NULL;
591	PL_comppad = 0;	735	PL_comppad = 0;
592	PL_curpm = 0;	736	PL_curpm = 0;
		737	PL_curpad = 0;
593	PL_localizing = 0;	738	PL_localizing = 0;
594	PL_dirty = 0;	739	PL_dirty = 0;
595	PL_restartop = 0;	740	PL_restartop = 0;
596		741
		742	/* recreate the die/warn hooks */
		743	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		744	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		745
		746	GvSV (PL_defgv) = newSV (0);
		747	GvAV (PL_defgv) = coro->args; coro->args = 0;
		748	GvSV (PL_errgv) = newSV (0);
		749	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		750	PL_rs = newSVsv (GvSV (irsgv));
		751	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		752
597	{	753	{
598	dSP;	754	dSP;
599	LOGOP myop;	755	LOGOP myop;
600		756
601	SvREFCNT_dec (GvAV (PL_defgv));
602	GvAV (PL_defgv) = coro->args; coro->args = 0;
603
604	Zero (&myop, 1, LOGOP);	757	Zero (&myop, 1, LOGOP);
605	myop.op_next = Nullop;	758	myop.op_next = Nullop;
606	myop.op_flags = OPf_WANT_VOID;	759	myop.op_flags = OPf_WANT_VOID;
607		760
608	PUSHMARK (SP);	761	PUSHMARK (SP);
609	XPUSHs (av_shift (GvAV (PL_defgv)));	762	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
610	PUTBACK;	763	PUTBACK;
611	PL_op = (OP *)&myop;	764	PL_op = (OP *)&myop;
612	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	765	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
613	SPAGAIN;	766	SPAGAIN;
614	}	767	}
615		768
616	ENTER; /* necessary e.g. for dounwind */	769	/* this newly created coroutine might be run on an existing cctx which most
		770	* likely was suspended in set_stacklevel, called from entersub.
		771	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		772	* so we ENTER here for symmetry
		773	*/
		774	ENTER;
		775	}
		776
		777	static void
		778	coro_destroy (pTHX_ struct coro *coro)
		779	{
		780	if (!IN_DESTRUCT)
		781	{
		782	/* restore all saved variables and stuff */
		783	LEAVE_SCOPE (0);
		784	assert (PL_tmps_floor == -1);
		785
		786	/* free all temporaries */
		787	FREETMPS;
		788	assert (PL_tmps_ix == -1);
		789
		790	/* unwind all extra stacks */
		791	POPSTACK_TO (PL_mainstack);
		792
		793	/* unwind main stack */
		794	dounwind (-1);
		795	}
		796
		797	SvREFCNT_dec (GvSV (PL_defgv));
		798	SvREFCNT_dec (GvAV (PL_defgv));
		799	SvREFCNT_dec (GvSV (PL_errgv));
		800	SvREFCNT_dec (PL_defoutgv);
		801	SvREFCNT_dec (PL_rs);
		802	SvREFCNT_dec (GvSV (irsgv));
		803
		804	SvREFCNT_dec (PL_diehook);
		805	SvREFCNT_dec (PL_warnhook);
		806
		807	SvREFCNT_dec (coro->saved_deffh);
		808	SvREFCNT_dec (coro->throw);
		809
		810	coro_destroy_stacks (aTHX);
617	}	811	}
618		812
619	static void	813	static void
620	free_coro_mortal (pTHX)	814	free_coro_mortal (pTHX)
621	{	815	{
622	if (coro_mortal)	816	if (expect_true (coro_mortal))
623	{	817	{
624	SvREFCNT_dec (coro_mortal);	818	SvREFCNT_dec (coro_mortal);
625	coro_mortal = 0;	819	coro_mortal = 0;
626	}	820	}
		821	}
		822
		823	static int
		824	runops_trace (pTHX)
		825	{
		826	COP *oldcop = 0;
		827	int oldcxix = -2;
		828	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		829	coro_cctx *cctx = coro->cctx;
		830
		831	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		832	{
		833	PERL_ASYNC_CHECK ();
		834
		835	if (cctx->flags & CC_TRACE_ALL)
		836	{
		837	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		838	{
		839	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		840	SV **bot, **top;
		841	AV *av = newAV (); /* return values */
		842	SV **cb;
		843	dSP;
		844
		845	GV *gv = CvGV (cx->blk_sub.cv);
		846	SV *fullname = sv_2mortal (newSV (0));
		847	if (isGV (gv))
		848	gv_efullname3 (fullname, gv, 0);
		849
		850	bot = PL_stack_base + cx->blk_oldsp + 1;
		851	top = cx->blk_gimme == G_ARRAY ? SP + 1
		852	: cx->blk_gimme == G_SCALAR ? bot + 1
		853	: bot;
		854
		855	av_extend (av, top - bot);
		856	while (bot < top)
		857	av_push (av, SvREFCNT_inc (*bot++));
		858
		859	PL_runops = RUNOPS_DEFAULT;
		860	ENTER;
		861	SAVETMPS;
		862	EXTEND (SP, 3);
		863	PUSHMARK (SP);
		864	PUSHs (&PL_sv_no);
		865	PUSHs (fullname);
		866	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		867	PUTBACK;
		868	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		869	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		870	SPAGAIN;
		871	FREETMPS;
		872	LEAVE;
		873	PL_runops = runops_trace;
		874	}
		875
		876	if (oldcop != PL_curcop)
		877	{
		878	oldcop = PL_curcop;
		879
		880	if (PL_curcop != &PL_compiling)
		881	{
		882	SV **cb;
		883
		884	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		885	{
		886	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		887
		888	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		889	{
		890	runops_proc_t old_runops = PL_runops;
		891	dSP;
		892	GV *gv = CvGV (cx->blk_sub.cv);
		893	SV *fullname = sv_2mortal (newSV (0));
		894
		895	if (isGV (gv))
		896	gv_efullname3 (fullname, gv, 0);
		897
		898	PL_runops = RUNOPS_DEFAULT;
		899	ENTER;
		900	SAVETMPS;
		901	EXTEND (SP, 3);
		902	PUSHMARK (SP);
		903	PUSHs (&PL_sv_yes);
		904	PUSHs (fullname);
		905	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		906	PUTBACK;
		907	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		908	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		909	SPAGAIN;
		910	FREETMPS;
		911	LEAVE;
		912	PL_runops = runops_trace;
		913	}
		914
		915	oldcxix = cxstack_ix;
		916	}
		917
		918	if (cctx->flags & CC_TRACE_LINE)
		919	{
		920	dSP;
		921
		922	PL_runops = RUNOPS_DEFAULT;
		923	ENTER;
		924	SAVETMPS;
		925	EXTEND (SP, 3);
		926	PL_runops = RUNOPS_DEFAULT;
		927	PUSHMARK (SP);
		928	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		929	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		930	PUTBACK;
		931	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		932	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		933	SPAGAIN;
		934	FREETMPS;
		935	LEAVE;
		936	PL_runops = runops_trace;
		937	}
		938	}
		939	}
		940	}
		941	}
		942
		943	TAINT_NOT;
		944	return 0;
627	}	945	}
628		946
629	/* inject a fake call to Coro::State::_cctx_init into the execution */	947	/* inject a fake call to Coro::State::_cctx_init into the execution */
630	/* _cctx_init should be careful, as it could be called at almost any time */	948	/* _cctx_init should be careful, as it could be called at almost any time */
631	/* during execution of a perl program */	949	/* during execution of a perl program */
632	static void NOINLINE	950	static void NOINLINE
633	prepare_cctx (pTHX_ coro_cctx *cctx)	951	cctx_prepare (pTHX_ coro_cctx *cctx)
634	{	952	{
635	dSP;	953	dSP;
636	LOGOP myop;	954	LOGOP myop;
		955
		956	PL_top_env = &PL_start_env;
		957
		958	if (cctx->flags & CC_TRACE)
		959	PL_runops = runops_trace;
637		960
638	Zero (&myop, 1, LOGOP);	961	Zero (&myop, 1, LOGOP);
639	myop.op_next = PL_op;	962	myop.op_next = PL_op;
640	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	963	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
641		964
…		…
651		974
652	/*	975	/*
653	* this is a _very_ stripped down perl interpreter ;)	976	* this is a _very_ stripped down perl interpreter ;)
654	*/	977	*/
655	static void	978	static void
656	coro_run (void *arg)	979	cctx_run (void *arg)
657	{	980	{
658	dTHX;	981	dTHX;
659		982
660	/* coro_run is the alternative tail of transfer(), so unlock here. */	983	/* cctx_run is the alternative tail of transfer(), so unlock here. */
661	UNLOCK;	984	UNLOCK;
662		985
663	PL_top_env = &PL_start_env;	986	/* we now skip the entersub that lead to transfer() */
		987	PL_op = PL_op->op_next;
664		988
665	/* inject a fake subroutine call to cctx_init */	989	/* inject a fake subroutine call to cctx_init */
666	prepare_cctx (aTHX_ (coro_cctx *)arg);	990	cctx_prepare (aTHX_ (coro_cctx *)arg);
667		991
668	/* somebody or something will hit me for both perl_run and PL_restartop */	992	/* somebody or something will hit me for both perl_run and PL_restartop */
669	PL_restartop = PL_op;	993	PL_restartop = PL_op;
670	perl_run (PL_curinterp);	994	perl_run (PL_curinterp);
671		995
…		…
690	++cctx_count;	1014	++cctx_count;
691		1015
692	Newz (0, cctx, 1, coro_cctx);	1016	Newz (0, cctx, 1, coro_cctx);
693		1017
694	#if HAVE_MMAP	1018	#if HAVE_MMAP
695
696	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;	1019	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
697	/* mmap supposedly does allocate-on-write for us */	1020	/* mmap supposedly does allocate-on-write for us */
698	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1021	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
699		1022
700	if (cctx->sptr != (void *)-1)	1023	if (cctx->sptr != (void *)-1)
…		…
702	# if CORO_STACKGUARD	1025	# if CORO_STACKGUARD
703	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);	1026	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
704	# endif	1027	# endif
705	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;	1028	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
706	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;	1029	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
707	cctx->mapped = 1;	1030	cctx->flags |= CC_MAPPED;
708	}	1031	}
709	else	1032	else
710	#endif	1033	#endif
711	{	1034	{
712	cctx->ssize = coro_stacksize * (long)sizeof (long);	1035	cctx->ssize = coro_stacksize * (long)sizeof (long);
…		…
721	stack_start = cctx->sptr;	1044	stack_start = cctx->sptr;
722	stack_size = cctx->ssize;	1045	stack_size = cctx->ssize;
723	}	1046	}
724		1047
725	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);	1048	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
726	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);	1049	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
727		1050
728	return cctx;	1051	return cctx;
729	}	1052	}
730		1053
731	static void	1054	static void
…		…
739	#if CORO_USE_VALGRIND	1062	#if CORO_USE_VALGRIND
740	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	1063	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
741	#endif	1064	#endif
742		1065
743	#if HAVE_MMAP	1066	#if HAVE_MMAP
744	if (cctx->mapped)	1067	if (cctx->flags & CC_MAPPED)
745	munmap (cctx->sptr, cctx->ssize);	1068	munmap (cctx->sptr, cctx->ssize);
746	else	1069	else
747	#endif	1070	#endif
748	Safefree (cctx->sptr);	1071	Safefree (cctx->sptr);
749		1072
750	Safefree (cctx);	1073	Safefree (cctx);
751	}	1074	}
752		1075
		1076	/* wether this cctx should be destructed */
		1077	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1078
753	static coro_cctx *	1079	static coro_cctx *
754	cctx_get (pTHX)	1080	cctx_get (pTHX)
755	{	1081	{
756	while (cctx_first)	1082	while (expect_true (cctx_first))
757	{	1083	{
758	coro_cctx *cctx = cctx_first;	1084	coro_cctx *cctx = cctx_first;
759	cctx_first = cctx->next;	1085	cctx_first = cctx->next;
760	--cctx_idle;	1086	--cctx_idle;
761		1087
762	if (cctx->ssize >= coro_stacksize)	1088	if (expect_true (!CCTX_EXPIRED (cctx)))
763	return cctx;	1089	return cctx;
764		1090
765	cctx_destroy (cctx);	1091	cctx_destroy (cctx);
766	}	1092	}
767		1093
768	PL_op = PL_op->op_next;
769	return cctx_new ();	1094	return cctx_new ();
770	}	1095	}
771		1096
772	static void	1097	static void
773	cctx_put (coro_cctx *cctx)	1098	cctx_put (coro_cctx *cctx)
774	{	1099	{
775	/* free another cctx if overlimit */	1100	/* free another cctx if overlimit */
776	if (cctx_idle >= MAX_IDLE_CCTX)	1101	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
777	{	1102	{
778	coro_cctx *first = cctx_first;	1103	coro_cctx *first = cctx_first;
779	cctx_first = first->next;	1104	cctx_first = first->next;
780	--cctx_idle;	1105	--cctx_idle;
781		1106
782	assert (!first->inuse);
783	cctx_destroy (first);	1107	cctx_destroy (first);
784	}	1108	}
785		1109
786	++cctx_idle;	1110	++cctx_idle;
787	cctx->next = cctx_first;	1111	cctx->next = cctx_first;
788	cctx_first = cctx;	1112	cctx_first = cctx;
789	}	1113	}
790		1114
791	/** coroutine switching *****************************************************/	1115	/** coroutine switching *****************************************************/
792		1116
793	/* never call directly, always through the coro_state_transfer global variable */	1117	static void
		1118	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1119	{
		1120	if (expect_true (prev != next))
		1121	{
		1122	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1123	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1124
		1125	if (expect_false (next->flags & CF_RUNNING))
		1126	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1127
		1128	if (expect_false (next->flags & CF_DESTROYED))
		1129	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1130
		1131	if (
		1132	#if PERL_VERSION_ATLEAST (5,9,0)
		1133	expect_false (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
		1134	#else
		1135	expect_false (PL_lex_state != LEX_NOTPARSING)
		1136	#endif
		1137	)
		1138	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1139	}
		1140	}
		1141
		1142	/* always use the TRANSFER macro */
794	static void NOINLINE	1143	static void NOINLINE
795	transfer (pTHX_ struct coro *prev, struct coro *next)	1144	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
796	{	1145	{
797	dSTACKLEVEL;	1146	dSTACKLEVEL;
		1147	static volatile int has_throw;
798		1148
799	/* sometimes transfer is only called to set idle_sp */	1149	/* sometimes transfer is only called to set idle_sp */
800	if (!next)	1150	if (expect_false (!next))
801	{	1151	{
802	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1152	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
803	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1153	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
804	}	1154	}
805	else if (prev != next)	1155	else if (expect_true (prev != next))
806	{	1156	{
807	coro_cctx *prev__cctx;	1157	coro_cctx *prev__cctx;
808		1158
809	if (prev->flags & CF_NEW)	1159	if (expect_false (prev->flags & CF_NEW))
810	{	1160	{
811	/* create a new empty context */	1161	/* create a new empty context */
812	Newz (0, prev->cctx, 1, coro_cctx);	1162	Newz (0, prev->cctx, 1, coro_cctx);
813	prev->cctx->inuse = 1;
814	prev->flags &= ~CF_NEW;	1163	prev->flags &= ~CF_NEW;
815	prev->flags |= CF_RUNNING;	1164	prev->flags |= CF_RUNNING;
816	}	1165	}
817		1166
818	/*TODO: must not croak here */
819	if (!prev->flags & CF_RUNNING)
820	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
821
822	if (next->flags & CF_RUNNING)
823	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
824
825	if (next->flags & CF_DESTROYED)
826	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
827
828	prev->flags &= ~CF_RUNNING;	1167	prev->flags &= ~CF_RUNNING;
829	next->flags |= CF_RUNNING;	1168	next->flags |= CF_RUNNING;
830		1169
831	LOCK;	1170	LOCK;
832		1171
		1172	/* first get rid of the old state */
		1173	save_perl (aTHX_ prev);
		1174
833	if (next->flags & CF_NEW)	1175	if (expect_false (next->flags & CF_NEW))
834	{	1176	{
835	/* need to start coroutine */	1177	/* need to start coroutine */
836	next->flags &= ~CF_NEW;	1178	next->flags &= ~CF_NEW;
837	/* first get rid of the old state */
838	save_perl (aTHX_ prev);
839	/* setup coroutine call */	1179	/* setup coroutine call */
840	setup_coro (aTHX_ next);	1180	coro_setup (aTHX_ next);
841	/* need a new stack */
842	assert (!next->cctx);
843	}	1181	}
844	else	1182	else
845	{
846	/* coroutine already started */
847	save_perl (aTHX_ prev);
848	load_perl (aTHX_ next);	1183	load_perl (aTHX_ next);
849	}
850		1184
851	prev__cctx = prev->cctx;	1185	prev__cctx = prev->cctx;
852		1186
853	/* possibly "free" the cctx */	1187	/* possibly "free" the cctx */
		1188	if (expect_true (
854	if (prev__cctx->idle_sp == STACKLEVEL)	1189	prev__cctx->idle_sp == STACKLEVEL
		1190	&& !(prev__cctx->flags & CC_TRACE)
		1191	&& !force_cctx
		1192	))
855	{	1193	{
856	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1194	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
857	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1195	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
858		1196
859	prev->cctx = 0;	1197	prev->cctx = 0;
860		1198
		1199	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1200	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1201	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1202	if (!next->cctx)
		1203	next->cctx = cctx_get (aTHX);
		1204
861	cctx_put (prev__cctx);	1205	cctx_put (prev__cctx);
862	prev__cctx->inuse = 0;
863	}	1206	}
864		1207
		1208	++next->usecount;
		1209
865	if (!next->cctx)	1210	if (expect_true (!next->cctx))
866	{
867	next->cctx = cctx_get (aTHX);	1211	next->cctx = cctx_get (aTHX);
868	assert (!next->cctx->inuse);
869	next->cctx->inuse = 1;
870	}
871		1212
		1213	has_throw = !!next->throw;
		1214
872	if (prev__cctx != next->cctx)	1215	if (expect_false (prev__cctx != next->cctx))
873	{	1216	{
874	prev__cctx->top_env = PL_top_env;	1217	prev__cctx->top_env = PL_top_env;
875	PL_top_env = next->cctx->top_env;	1218	PL_top_env = next->cctx->top_env;
876	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1219	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
877	}	1220	}
878		1221
879	free_coro_mortal (aTHX);	1222	free_coro_mortal (aTHX);
880	UNLOCK;	1223	UNLOCK;
		1224
		1225	if (expect_false (has_throw))
		1226	{
		1227	struct coro *coro = SvSTATE (coro_current);
		1228
		1229	if (coro->throw)
		1230	{
		1231	SV *exception = coro->throw;
		1232	coro->throw = 0;
		1233	sv_setsv (ERRSV, exception);
		1234	croak (0);
		1235	}
		1236	}
881	}	1237	}
882	}	1238	}
883		1239
884	struct transfer_args	1240	struct transfer_args
885	{	1241	{
886	struct coro *prev, *next;	1242	struct coro *prev, *next;
887	};	1243	};
888		1244
		1245	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
889	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)	1246	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
890		1247
891	/** high level stuff ********************************************************/	1248	/** high level stuff ********************************************************/
892		1249
893	static int	1250	static int
894	coro_state_destroy (pTHX_ struct coro *coro)	1251	coro_state_destroy (pTHX_ struct coro *coro)
…		…
911		1268
912	if (coro->mainstack && coro->mainstack != main_mainstack)	1269	if (coro->mainstack && coro->mainstack != main_mainstack)
913	{	1270	{
914	struct coro temp;	1271	struct coro temp;
915		1272
916	assert (!(coro->flags & CF_RUNNING));
917
918	Zero (&temp, 1, struct coro);
919	temp.save = CORO_SAVE_ALL;
920
921	if (coro->flags & CF_RUNNING)	1273	if (coro->flags & CF_RUNNING)
922	croak ("FATAL: tried to destroy currently running coroutine");	1274	croak ("FATAL: tried to destroy currently running coroutine");
923		1275
924	save_perl (aTHX_ &temp);	1276	save_perl (aTHX_ &temp);
925	load_perl (aTHX_ coro);	1277	load_perl (aTHX_ coro);
926		1278
927	coro_destroy_stacks (aTHX);	1279	coro_destroy (aTHX_ coro);
928		1280
929	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */	1281	load_perl (aTHX_ &temp);
930		1282
931	coro->mainstack = 0;	1283	coro->slot = 0;
932	}	1284	}
933		1285
934	cctx_destroy (coro->cctx);	1286	cctx_destroy (coro->cctx);
935	SvREFCNT_dec (coro->args);	1287	SvREFCNT_dec (coro->args);
936		1288
…		…
977	#else	1329	#else
978	# define MGf_DUP 0	1330	# define MGf_DUP 0
979	#endif	1331	#endif
980	};	1332	};
981		1333
982	static struct coro *
983	SvSTATE_ (pTHX_ SV *coro)
984	{
985	HV *stash;
986	MAGIC *mg;
987
988	if (SvROK (coro))
989	coro = SvRV (coro);
990
991	stash = SvSTASH (coro);
992	if (stash != coro_stash && stash != coro_state_stash)
993	{
994	/* very slow, but rare, check */
995	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
996	croak ("Coro::State object required");
997	}
998
999	mg = CORO_MAGIC (coro);
1000	return (struct coro *)mg->mg_ptr;
1001	}
1002
1003	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
1004
1005	static void	1334	static void
1006	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1335	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
1007	{	1336	{
1008	ta->prev = SvSTATE (prev_sv);	1337	ta->prev = SvSTATE (prev_sv);
1009	ta->next = SvSTATE (next_sv);	1338	ta->next = SvSTATE (next_sv);
		1339	TRANSFER_CHECK (*ta);
1010	}	1340	}
1011		1341
1012	static void	1342	static void
1013	api_transfer (SV *prev_sv, SV *next_sv)	1343	api_transfer (SV *prev_sv, SV *next_sv)
1014	{	1344	{
1015	dTHX;	1345	dTHX;
1016	struct transfer_args ta;	1346	struct transfer_args ta;
1017		1347
1018	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);	1348	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
1019	TRANSFER (ta);	1349	TRANSFER (ta, 1);
1020	}
1021
1022	static int
1023	api_save (SV *coro_sv, int new_save)
1024	{
1025	dTHX;
1026	struct coro *coro = SvSTATE (coro_sv);
1027	int old_save = coro->save;
1028
1029	if (new_save >= 0)
1030	coro->save = new_save;
1031
1032	return old_save;
1033	}	1350	}
1034		1351
1035	/** Coro ********************************************************************/	1352	/** Coro ********************************************************************/
1036		1353
1037	static void	1354	static void
…		…
1039	{	1356	{
1040	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1357	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
1041	}	1358	}
1042		1359
1043	static SV *	1360	static SV *
1044	coro_deq (pTHX_ int min_prio)	1361	coro_deq (pTHX)
1045	{	1362	{
1046	int prio = PRIO_MAX - PRIO_MIN;	1363	int prio;
1047		1364
1048	min_prio -= PRIO_MIN;
1049	if (min_prio < 0)
1050	min_prio = 0;
1051
1052	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1365	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
1053	if (AvFILLp (coro_ready [prio]) >= 0)	1366	if (AvFILLp (coro_ready [prio]) >= 0)
1054	return av_shift (coro_ready [prio]);	1367	return av_shift (coro_ready [prio]);
1055		1368
1056	return 0;	1369	return 0;
1057	}	1370	}
…		…
1093	SV *prev_sv, *next_sv;	1406	SV *prev_sv, *next_sv;
1094		1407
1095	for (;;)	1408	for (;;)
1096	{	1409	{
1097	LOCK;	1410	LOCK;
1098	next_sv = coro_deq (aTHX_ PRIO_MIN);	1411	next_sv = coro_deq (aTHX);
1099		1412
1100	/* nothing to schedule: call the idle handler */	1413	/* nothing to schedule: call the idle handler */
1101	if (!next_sv)	1414	if (expect_false (!next_sv))
1102	{	1415	{
1103	dSP;	1416	dSP;
1104	UNLOCK;	1417	UNLOCK;
1105		1418
1106	ENTER;	1419	ENTER;
1107	SAVETMPS;	1420	SAVETMPS;
1108		1421
1109	PUSHMARK (SP);	1422	PUSHMARK (SP);
1110	PUTBACK;	1423	PUTBACK;
1111	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);	1424	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1425	SPAGAIN;
1112		1426
1113	FREETMPS;	1427	FREETMPS;
1114	LEAVE;	1428	LEAVE;
1115	continue;	1429	continue;
1116	}	1430	}
1117		1431
1118	ta->next = SvSTATE (next_sv);	1432	ta->next = SvSTATE (next_sv);
1119		1433
1120	/* cannot transfer to destroyed coros, skip and look for next */	1434	/* cannot transfer to destroyed coros, skip and look for next */
1121	if (ta->next->flags & CF_DESTROYED)	1435	if (expect_false (ta->next->flags & CF_DESTROYED))
1122	{	1436	{
1123	UNLOCK;	1437	UNLOCK;
1124	SvREFCNT_dec (next_sv);	1438	SvREFCNT_dec (next_sv);
1125	/* coro_nready is already taken care of by destroy */	1439	/* coro_nready is already taken care of by destroy */
1126	continue;	1440	continue;
…		…
1131	break;	1445	break;
1132	}	1446	}
1133		1447
1134	/* free this only after the transfer */	1448	/* free this only after the transfer */
1135	prev_sv = SvRV (coro_current);	1449	prev_sv = SvRV (coro_current);
1136	SvRV_set (coro_current, next_sv);
1137	ta->prev = SvSTATE (prev_sv);	1450	ta->prev = SvSTATE (prev_sv);
1138		1451	TRANSFER_CHECK (*ta);
1139	assert (ta->next->flags & CF_READY);	1452	assert (ta->next->flags & CF_READY);
1140	ta->next->flags &= ~CF_READY;	1453	ta->next->flags &= ~CF_READY;
		1454	SvRV_set (coro_current, next_sv);
1141		1455
1142	LOCK;	1456	LOCK;
1143	free_coro_mortal (aTHX);	1457	free_coro_mortal (aTHX);
1144	coro_mortal = prev_sv;	1458	coro_mortal = prev_sv;
1145	UNLOCK;	1459	UNLOCK;
…		…
1171	{	1485	{
1172	dTHX;	1486	dTHX;
1173	struct transfer_args ta;	1487	struct transfer_args ta;
1174		1488
1175	prepare_schedule (aTHX_ &ta);	1489	prepare_schedule (aTHX_ &ta);
1176	TRANSFER (ta);	1490	TRANSFER (ta, 1);
1177	}	1491	}
1178		1492
1179	static int	1493	static int
1180	api_cede (void)	1494	api_cede (void)
1181	{	1495	{
1182	dTHX;	1496	dTHX;
1183	struct transfer_args ta;	1497	struct transfer_args ta;
1184		1498
1185	prepare_cede (aTHX_ &ta);	1499	prepare_cede (aTHX_ &ta);
1186		1500
1187	if (ta.prev != ta.next)	1501	if (expect_true (ta.prev != ta.next))
1188	{	1502	{
1189	TRANSFER (ta);	1503	TRANSFER (ta, 1);
1190	return 1;	1504	return 1;
1191	}	1505	}
1192	else	1506	else
1193	return 0;	1507	return 0;
1194	}	1508	}
…		…
1199	dTHX;	1513	dTHX;
1200	struct transfer_args ta;	1514	struct transfer_args ta;
1201		1515
1202	if (prepare_cede_notself (aTHX_ &ta))	1516	if (prepare_cede_notself (aTHX_ &ta))
1203	{	1517	{
1204	TRANSFER (ta);	1518	TRANSFER (ta, 1);
1205	return 1;	1519	return 1;
1206	}	1520	}
1207	else	1521	else
1208	return 0;	1522	return 0;
1209	}	1523	}
1210		1524
		1525	static void
		1526	api_trace (SV *coro_sv, int flags)
		1527	{
		1528	dTHX;
		1529	struct coro *coro = SvSTATE (coro_sv);
		1530
		1531	if (flags & CC_TRACE)
		1532	{
		1533	if (!coro->cctx)
		1534	coro->cctx = cctx_new ();
		1535	else if (!(coro->cctx->flags & CC_TRACE))
		1536	croak ("cannot enable tracing on coroutine with custom stack");
		1537
		1538	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1539	}
		1540	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1541	{
		1542	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1543
		1544	if (coro->flags & CF_RUNNING)
		1545	PL_runops = RUNOPS_DEFAULT;
		1546	else
		1547	coro->slot->runops = RUNOPS_DEFAULT;
		1548	}
		1549	}
		1550
1211	MODULE = Coro::State PACKAGE = Coro::State	1551	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1212		1552
1213	PROTOTYPES: DISABLE	1553	PROTOTYPES: DISABLE
1214		1554
1215	BOOT:	1555	BOOT:
1216	{	1556	{
1217	#ifdef USE_ITHREADS	1557	#ifdef USE_ITHREADS
1218	MUTEX_INIT (&coro_mutex);	1558	MUTEX_INIT (&coro_mutex);
1219	#endif	1559	#endif
1220	BOOT_PAGESIZE;	1560	BOOT_PAGESIZE;
1221		1561
		1562	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1563	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1564
		1565	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1566	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1567	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1568	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1569
		1570	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1571	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1572	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1573
1222	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1574	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1223		1575
1224	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1576	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1225	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));	1577	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1226	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1227	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1228	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
1229	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));	1578	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1230	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1579	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1231		1580
1232	main_mainstack = PL_mainstack;	1581	main_mainstack = PL_mainstack;
1233	main_top_env = PL_top_env;	1582	main_top_env = PL_top_env;
1234		1583
1235	while (main_top_env->je_prev)	1584	while (main_top_env->je_prev)
1236	main_top_env = main_top_env->je_prev;	1585	main_top_env = main_top_env->je_prev;
1237		1586
1238	coroapi.ver = CORO_API_VERSION;	1587	coroapi.ver = CORO_API_VERSION;
		1588	coroapi.rev = CORO_API_REVISION;
1239	coroapi.transfer = api_transfer;	1589	coroapi.transfer = api_transfer;
1240		1590
1241	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1591	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1242	}	1592	}
1243		1593
1244	SV *	1594	SV *
1245	new (char *klass, ...)	1595	new (char *klass, ...)
1246	CODE:	1596	CODE:
1247	{	1597	{
1248	struct coro *coro;	1598	struct coro *coro;
		1599	MAGIC *mg;
1249	HV *hv;	1600	HV *hv;
1250	int i;	1601	int i;
1251		1602
1252	Newz (0, coro, 1, struct coro);	1603	Newz (0, coro, 1, struct coro);
1253	coro->args = newAV ();	1604	coro->args = newAV ();
1254	coro->save = CORO_SAVE_DEF;
1255	coro->flags = CF_NEW;	1605	coro->flags = CF_NEW;
1256		1606
1257	if (coro_first) coro_first->prev = coro;	1607	if (coro_first) coro_first->prev = coro;
1258	coro->next = coro_first;	1608	coro->next = coro_first;
1259	coro_first = coro;	1609	coro_first = coro;
1260		1610
1261	coro->hv = hv = newHV ();	1611	coro->hv = hv = newHV ();
1262	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1612	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1613	mg->mg_flags |= MGf_DUP;
1263	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1614	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1264		1615
		1616	av_extend (coro->args, items - 1);
1265	for (i = 1; i < items; i++)	1617	for (i = 1; i < items; i++)
1266	av_push (coro->args, newSVsv (ST (i)));	1618	av_push (coro->args, newSVsv (ST (i)));
1267	}	1619	}
1268	OUTPUT:	1620	OUTPUT:
1269	RETVAL	1621	RETVAL
1270		1622
1271	int	1623	# these not obviously related functions are all rolled into the same xs
1272	save (SV *coro, int new_save = -1)	1624	# function to increase chances that they all will call transfer with the same
1273	CODE:	1625	# stack offset
1274	RETVAL = api_save (coro, new_save);
1275	OUTPUT:
1276	RETVAL
1277
1278	int
1279	save_also (SV *coro_sv, int save_also)
1280	CODE:
1281	{
1282	struct coro *coro = SvSTATE (coro_sv);
1283	RETVAL = coro->save;
1284	coro->save |= save_also;
1285	}
1286	OUTPUT:
1287	RETVAL
1288
1289	void	1626	void
1290	_set_stacklevel (...)	1627	_set_stacklevel (...)
1291	ALIAS:	1628	ALIAS:
1292	Coro::State::transfer = 1	1629	Coro::State::transfer = 1
1293	Coro::schedule = 2	1630	Coro::schedule = 2
…		…
1295	Coro::cede_notself = 4	1632	Coro::cede_notself = 4
1296	CODE:	1633	CODE:
1297	{	1634	{
1298	struct transfer_args ta;	1635	struct transfer_args ta;
1299		1636
		1637	PUTBACK;
1300	switch (ix)	1638	switch (ix)
1301	{	1639	{
1302	case 0:	1640	case 0:
1303	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1641	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1304	ta.next = 0;	1642	ta.next = 0;
…		…
1323	if (!prepare_cede_notself (aTHX_ &ta))	1661	if (!prepare_cede_notself (aTHX_ &ta))
1324	XSRETURN_EMPTY;	1662	XSRETURN_EMPTY;
1325		1663
1326	break;	1664	break;
1327	}	1665	}
		1666	SPAGAIN;
1328		1667
1329	BARRIER;	1668	BARRIER;
		1669	PUTBACK;
1330	TRANSFER (ta);	1670	TRANSFER (ta, 0);
1331		1671	SPAGAIN; /* might be the sp of a different coroutine now */
1332	if (GIMME_V != G_VOID && ta.next != ta.prev)	1672	/* be extra careful not to ever do anything after TRANSFER */
1333	XSRETURN_YES;
1334	}	1673	}
1335		1674
1336	bool	1675	bool
1337	_destroy (SV *coro_sv)	1676	_destroy (SV *coro_sv)
1338	CODE:	1677	CODE:
…		…
1379	if (coro->hv)	1718	if (coro->hv)
1380	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));	1719	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
1381	}	1720	}
1382		1721
1383	void	1722	void
1384	_eval (Coro::State coro, SV *coderef)	1723	call (Coro::State coro, SV *coderef)
		1724	ALIAS:
		1725	eval = 1
1385	CODE:	1726	CODE:
1386	{	1727	{
1387	if (coro->mainstack)	1728	if (coro->mainstack)
1388	{	1729	{
1389	struct coro temp;	1730	struct coro temp;
1390	Zero (&temp, 1, struct coro);
1391	temp.save = CORO_SAVE_ALL;
1392		1731
1393	if (!(coro->flags & CF_RUNNING))	1732	if (!(coro->flags & CF_RUNNING))
1394	{	1733	{
		1734	PUTBACK;
1395	save_perl (aTHX_ &temp);	1735	save_perl (aTHX_ &temp);
1396	load_perl (aTHX_ coro);	1736	load_perl (aTHX_ coro);
1397	}	1737	}
1398		1738
1399	{	1739	{
1400	dSP;	1740	dSP;
1401	ENTER;	1741	ENTER;
1402	SAVETMPS;	1742	SAVETMPS;
		1743	PUTBACK;
		1744	PUSHSTACK;
1403	PUSHMARK (SP);	1745	PUSHMARK (SP);
1404	PUTBACK;	1746
		1747	if (ix)
		1748	eval_sv (coderef, 0);
		1749	else
1405	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);	1750	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1751
		1752	POPSTACK;
1406	SPAGAIN;	1753	SPAGAIN;
1407	FREETMPS;	1754	FREETMPS;
1408	LEAVE;	1755	LEAVE;
1409	PUTBACK;	1756	PUTBACK;
1410	}	1757	}
1411		1758
1412	if (!(coro->flags & CF_RUNNING))	1759	if (!(coro->flags & CF_RUNNING))
1413	{	1760	{
1414	save_perl (aTHX_ coro);	1761	save_perl (aTHX_ coro);
1415	load_perl (aTHX_ &temp);	1762	load_perl (aTHX_ &temp);
		1763	SPAGAIN;
1416	}	1764	}
1417	}	1765	}
1418	}	1766	}
1419		1767
1420	SV *	1768	SV *
1421	is_ready (Coro::State coro)	1769	is_ready (Coro::State coro)
1422	PROTOTYPE: $	1770	PROTOTYPE: $
1423	ALIAS:	1771	ALIAS:
1424	is_ready = CF_READY	1772	is_ready = CF_READY
…		…
1428	CODE:	1776	CODE:
1429	RETVAL = boolSV (coro->flags & ix);	1777	RETVAL = boolSV (coro->flags & ix);
1430	OUTPUT:	1778	OUTPUT:
1431	RETVAL	1779	RETVAL
1432		1780
		1781	void
		1782	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1783
1433	SV *	1784	SV *
1434	has_stack (Coro::State coro)	1785	has_stack (Coro::State coro)
1435	PROTOTYPE: $	1786	PROTOTYPE: $
1436	CODE:	1787	CODE:
1437	RETVAL = boolSV (!!coro->cctx);	1788	RETVAL = boolSV (!!coro->cctx);
1438	OUTPUT:	1789	OUTPUT:
1439	RETVAL	1790	RETVAL
1440		1791
		1792	int
		1793	is_traced (Coro::State coro)
		1794	PROTOTYPE: $
		1795	CODE:
		1796	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1797	OUTPUT:
		1798	RETVAL
		1799
1441	IV	1800	IV
1442	rss (Coro::State coro)	1801	rss (Coro::State coro)
1443	PROTOTYPE: $	1802	PROTOTYPE: $
		1803	ALIAS:
		1804	usecount = 1
1444	CODE:	1805	CODE:
1445	RETVAL = coro_rss (coro);	1806	switch (ix)
		1807	{
		1808	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1809	case 1: RETVAL = coro->usecount; break;
		1810	}
1446	OUTPUT:	1811	OUTPUT:
1447	RETVAL	1812	RETVAL
1448		1813
		1814	void
		1815	force_cctx ()
		1816	CODE:
		1817	struct coro *coro = SvSTATE (coro_current);
		1818	coro->cctx->idle_sp = 0;
1449		1819
1450	MODULE = Coro::State PACKAGE = Coro	1820	MODULE = Coro::State PACKAGE = Coro
1451		1821
1452	BOOT:	1822	BOOT:
1453	{	1823	{
1454	int i;	1824	int i;
1455		1825
1456	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);	1826	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
1457	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);	1827	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
1458	av_async_pool = get_av ("Coro::async_pool", TRUE);	1828	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
1459		1829
1460	coro_current = get_sv ("Coro::current", FALSE);	1830	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
1461	SvREADONLY_on (coro_current);	1831	SvREADONLY_on (coro_current);
1462		1832
1463	coro_stash = gv_stashpv ("Coro", TRUE);	1833	coro_stash = gv_stashpv ("Coro", TRUE);
1464		1834
1465	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1835	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1466	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1836	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1467	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1837	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1468	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1838	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
…		…
1471		1841
1472	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1842	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1473	coro_ready[i] = newAV ();	1843	coro_ready[i] = newAV ();
1474		1844
1475	{	1845	{
1476	SV *sv = perl_get_sv("Coro::API", 1);	1846	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1847	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1477		1848
1478	coroapi.schedule = api_schedule;	1849	coroapi.schedule = api_schedule;
1479	coroapi.save = api_save;
1480	coroapi.cede = api_cede;	1850	coroapi.cede = api_cede;
1481	coroapi.cede_notself = api_cede_notself;	1851	coroapi.cede_notself = api_cede_notself;
1482	coroapi.ready = api_ready;	1852	coroapi.ready = api_ready;
1483	coroapi.is_ready = api_is_ready;	1853	coroapi.is_ready = api_is_ready;
1484	coroapi.nready = &coro_nready;	1854	coroapi.nready = &coro_nready;
…		…
1533	CODE:	1903	CODE:
1534	RETVAL = coro_nready;	1904	RETVAL = coro_nready;
1535	OUTPUT:	1905	OUTPUT:
1536	RETVAL	1906	RETVAL
1537		1907
		1908	void
		1909	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1910	PROTOTYPE: $;$
		1911	CODE:
		1912	SvREFCNT_dec (self->throw);
		1913	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1914
		1915	void
		1916	swap_defsv (Coro::State self)
		1917	PROTOTYPE: $
		1918	ALIAS:
		1919	swap_defav = 1
		1920	CODE:
		1921	if (!self->slot)
		1922	croak ("cannot swap state with coroutine that has no saved state");
		1923	else
		1924	{
		1925	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1926	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		1927
		1928	SV *tmp = *src; *src = *dst; *dst = tmp;
		1929	}
		1930
1538	# for async_pool speedup	1931	# for async_pool speedup
1539	void	1932	void
1540	_pool_1 (SV *cb)	1933	_pool_1 (SV *cb)
1541	CODE:	1934	CODE:
1542	{	1935	{
1543	int i, len;	1936	struct coro *coro = SvSTATE (coro_current);
1544	HV *hv = (HV *)SvRV (coro_current);	1937	HV *hv = (HV *)SvRV (coro_current);
1545	AV *defav = GvAV (PL_defgv);	1938	AV *defav = GvAV (PL_defgv);
1546	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);	1939	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
1547	AV *invoke_av;	1940	AV *invoke_av;
		1941	int i, len;
1548		1942
1549	if (!invoke)	1943	if (!invoke)
		1944	{
		1945	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1550	croak ("\3terminate\2\n");	1946	croak ("\3async_pool terminate\2\n");
		1947	}
		1948
		1949	SvREFCNT_dec (coro->saved_deffh);
		1950	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
1551		1951
1552	hv_store (hv, "desc", sizeof ("desc") - 1,	1952	hv_store (hv, "desc", sizeof ("desc") - 1,
1553	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);	1953	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
1554		1954
1555	invoke_av = (AV *)SvRV (invoke);	1955	invoke_av = (AV *)SvRV (invoke);
…		…
1573	{	1973	{
1574	struct coro *coro = SvSTATE (coro_current);	1974	struct coro *coro = SvSTATE (coro_current);
1575		1975
1576	sv_setsv (cb, &PL_sv_undef);	1976	sv_setsv (cb, &PL_sv_undef);
1577		1977
		1978	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1979	coro->saved_deffh = 0;
		1980
1578	if (coro_rss (coro) > SvIV (sv_pool_rss)	1981	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
1579	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))	1982	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1983	{
		1984	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
1580	croak ("\3terminate\2\n");	1985	croak ("\3async_pool terminate\2\n");
		1986	}
1581		1987
1582	av_clear (GvAV (PL_defgv));	1988	av_clear (GvAV (PL_defgv));
1583	hv_store (SvRV (coro_current), "desc", sizeof ("desc") - 1,	1989	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
1584	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);	1990	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
1585	coro->save = CORO_SAVE_DEF;	1991
1586	coro->prio = 0;	1992	coro->prio = 0;
		1993
		1994	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1995	api_trace (coro_current, 0);
		1996
1587	av_push (av_async_pool, newSVsv (coro_current));	1997	av_push (av_async_pool, newSVsv (coro_current));
1588	}	1998	}
1589		1999
1590		2000
1591	MODULE = Coro::State PACKAGE = Coro::AIO	2001	MODULE = Coro::State PACKAGE = Coro::AIO

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