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Comparing Coro/Coro/State.xs (file contents):
Revision 1.136 by root, Fri Jan 12 01:05:55 2007 UTC vs.
Revision 1.196 by root, Sat Oct 6 01:11:01 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
…		…
31	#else	33	#else
32	# define PAGESIZE 0	34	# define PAGESIZE 0
33	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
34	#endif	36	#endif
35		37
36	#if USE_VALGRIND	38	#if CORO_USE_VALGRIND
37	# include <valgrind/valgrind.h>	39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
38	#endif	43	#endif
39		44
40	/* the maximum number of idle cctx that will be pooled */	45	/* the maximum number of idle cctx that will be pooled */
41	#define MAX_IDLE_CCTX 8	46	#define MAX_IDLE_CCTX 8
42		47
…		…
70	/* 5.8.7 */	75	/* 5.8.7 */
71	#ifndef SvRV_set	76	#ifndef SvRV_set
72	# define SvRV_set(s,v) SvRV(s) = (v)	77	# define SvRV_set(s,v) SvRV(s) = (v)
73	#endif	78	#endif
74		79
		80	/* 5.8.8 */
		81	#ifndef GV_NOTQUAL
		82	# define GV_NOTQUAL 0
		83	#endif
		84	#ifndef newSV
		85	# define newSV(l) NEWSV(0,l)
		86	#endif
		87
75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	88	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
76	# undef STACKGUARD	89	# undef CORO_STACKGUARD
77	#endif	90	#endif
78		91
79	#ifndef STACKGUARD	92	#ifndef CORO_STACKGUARD
80	# define STACKGUARD 0	93	# define CORO_STACKGUARD 0
81	#endif	94	#endif
82		95
83	/* prefer perl internal functions over our own? */	96	/* prefer perl internal functions over our own? */
84	#ifndef PREFER_PERL_FUNCTIONS	97	#ifndef CORO_PREFER_PERL_FUNCTIONS
85	# define PREFER_PERL_FUNCTIONS 0	98	# define CORO_PREFER_PERL_FUNCTIONS 0
86	#endif	99	#endif
87		100
88	/* The next macro should declare a variable stacklevel that contains and approximation	101	/* The next macros try to return the current stack pointer, in an as
89	* to the current C stack pointer. Its property is that it changes with each call	102	* portable way as possible. */
90	* and should be unique. */
91	#define dSTACKLEVEL int stacklevel	103	#define dSTACKLEVEL volatile char stacklevel
92	#define STACKLEVEL ((void *)&stacklevel)	104	#define STACKLEVEL ((void *)&stacklevel)
93		105
94	#define IN_DESTRUCT (PL_main_cv == Nullcv)	106	#define IN_DESTRUCT (PL_main_cv == Nullcv)
95		107
96	#if __GNUC__ >= 3	108	#if __GNUC__ >= 3
97	# define attribute(x) __attribute__(x)	109	# define attribute(x) __attribute__(x)
98	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	110	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		111	# define expect(expr,value) __builtin_expect ((expr),(value))
99	#else	112	#else
100	# define attribute(x)	113	# define attribute(x)
101	# define BARRIER	114	# define BARRIER
		115	# define expect(expr,value) (expr)
102	#endif	116	#endif
		117
		118	#define expect_false(expr) expect ((expr) != 0, 0)
		119	#define expect_true(expr) expect ((expr) != 0, 1)
103		120
104	#define NOINLINE attribute ((noinline))	121	#define NOINLINE attribute ((noinline))
105		122
106	#include "CoroAPI.h"	123	#include "CoroAPI.h"
107		124
…		…
121	I32 laststype;	138	I32 laststype;
122	int laststatval;	139	int laststatval;
123	Stat_t statcache;	140	Stat_t statcache;
124	};	141	};
125		142
		143	static size_t coro_stacksize = CORO_STACKSIZE;
126	static struct CoroAPI coroapi;	144	static struct CoroAPI coroapi;
127	static AV *main_mainstack; /* used to differentiate between $main and others */	145	static AV *main_mainstack; /* used to differentiate between $main and others */
		146	static JMPENV *main_top_env;
128	static HV *coro_state_stash, *coro_stash;	147	static HV *coro_state_stash, *coro_stash;
129	static SV *coro_mortal; /* will be freed after next transfer */	148	static SV *coro_mortal; /* will be freed after next transfer */
130		149
		150	static GV *irsgv; /* $/ */
		151	static GV *stdoutgv; /* *STDOUT */
		152
		153	/* async_pool helper stuff */
		154	static SV *sv_pool_rss;
		155	static SV *sv_pool_size;
		156	static AV *av_async_pool;
		157
131	static struct coro_cctx *cctx_first;	158	static struct coro_cctx *cctx_first;
132	static int cctx_count, cctx_idle;	159	static int cctx_count, cctx_idle;
		160
		161	enum {
		162	CC_MAPPED = 0x01,
		163	CC_NOREUSE = 0x02, /* throw this away after tracing */
		164	CC_TRACE = 0x04,
		165	CC_TRACE_SUB = 0x08, /* trace sub calls */
		166	CC_TRACE_LINE = 0x10, /* trace each statement */
		167	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		168	};
133		169
134	/* this is a structure representing a c-level coroutine */	170	/* this is a structure representing a c-level coroutine */
135	typedef struct coro_cctx {	171	typedef struct coro_cctx {
136	struct coro_cctx *next;	172	struct coro_cctx *next;
137		173
138	/* the stack */	174	/* the stack */
139	void *sptr;	175	void *sptr;
140	long ssize; /* positive == mmap, otherwise malloc */	176	size_t ssize;
141		177
142	/* cpu state */	178	/* cpu state */
143	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	179	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
144	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */	180	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
145	JMPENV *top_env;	181	JMPENV *top_env;
146	coro_context cctx;	182	coro_context cctx;
147		183
148	int inuse;
149
150	#if USE_VALGRIND	184	#if CORO_USE_VALGRIND
151	int valgrind_id;	185	int valgrind_id;
152	#endif	186	#endif
		187	unsigned char flags;
153	} coro_cctx;	188	} coro_cctx;
154		189
155	enum {	190	enum {
156	CF_RUNNING = 0x0001, /* coroutine is running */	191	CF_RUNNING = 0x0001, /* coroutine is running */
157	CF_READY = 0x0002, /* coroutine is ready */	192	CF_READY = 0x0002, /* coroutine is ready */
…		…
165	coro_cctx *cctx;	200	coro_cctx *cctx;
166		201
167	/* data associated with this coroutine (initial args) */	202	/* data associated with this coroutine (initial args) */
168	AV *args;	203	AV *args;
169	int refcnt;	204	int refcnt;
170	int save; /* CORO_SAVE flags */
171	int flags; /* CF_ flags */	205	int flags; /* CF_ flags */
172		206
173	/* optionally saved, might be zero */	207	/* optionally saved, might be zero */
174	AV *defav; /* @_ */	208	AV *defav; /* @_ */
175	SV *defsv; /* $_ */	209	SV *defsv; /* $_ */
176	SV *errsv; /* $@ */	210	SV *errsv; /* $@ */
		211	SV *deffh; /* default filehandle */
177	SV *irssv; /* $/ */	212	SV *irssv; /* $/ */
178	SV *irssv_sv; /* real $/ cache */	213	SV *irssv_sv; /* real $/ cache */
179		214
180	#define VAR(name,type) type name;	215	#define VAR(name,type) type name;
181	# include "state.h"	216	# include "state.h"
182	#undef VAR	217	#undef VAR
183		218
		219	/* statistics */
		220	int usecount; /* number of transfers to this coro */
		221
184	/* coro process data */	222	/* coro process data */
185	int prio;	223	int prio;
		224	SV *throw;
		225
		226	/* async_pool */
		227	SV *saved_deffh;
		228
		229	/* linked list */
		230	struct coro *next, *prev;
		231	HV *hv; /* the perl hash associated with this coro, if any */
186	};	232	};
187		233
188	typedef struct coro *Coro__State;	234	typedef struct coro *Coro__State;
189	typedef struct coro *Coro__State_or_hashref;	235	typedef struct coro *Coro__State_or_hashref;
190		236
		237	/** Coro ********************************************************************/
		238
		239	#define PRIO_MAX 3
		240	#define PRIO_HIGH 1
		241	#define PRIO_NORMAL 0
		242	#define PRIO_LOW -1
		243	#define PRIO_IDLE -3
		244	#define PRIO_MIN -4
		245
		246	/* for Coro.pm */
		247	static SV *coro_current;
		248	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		249	static int coro_nready;
		250	static struct coro *coro_first;
		251
		252	/** lowlevel stuff **********************************************************/
		253
191	static AV *	254	static AV *
192	coro_clone_padlist (CV *cv)	255	coro_clone_padlist (pTHX_ CV *cv)
193	{	256	{
194	AV *padlist = CvPADLIST (cv);	257	AV *padlist = CvPADLIST (cv);
195	AV *newpadlist, *newpad;	258	AV *newpadlist, *newpad;
196		259
197	newpadlist = newAV ();	260	newpadlist = newAV ();
…		…
209		272
210	return newpadlist;	273	return newpadlist;
211	}	274	}
212		275
213	static void	276	static void
214	free_padlist (AV *padlist)	277	free_padlist (pTHX_ AV *padlist)
215	{	278	{
216	/* may be during global destruction */	279	/* may be during global destruction */
217	if (SvREFCNT (padlist))	280	if (SvREFCNT (padlist))
218	{	281	{
219	I32 i = AvFILLp (padlist);	282	I32 i = AvFILLp (padlist);
…		…
240	AV *padlist;	303	AV *padlist;
241	AV *av = (AV *)mg->mg_obj;	304	AV *av = (AV *)mg->mg_obj;
242		305
243	/* casting is fun. */	306	/* casting is fun. */
244	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	307	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
245	free_padlist (padlist);	308	free_padlist (aTHX_ padlist);
246		309
247	SvREFCNT_dec (av);	310	SvREFCNT_dec (av);
248		311
249	return 0;	312	return 0;
250	}	313	}
…		…
258	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	321	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
259	? SvMAGIC (cv) \	322	? SvMAGIC (cv) \
260	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	323	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
261	: 0	324	: 0
262		325
		326	static struct coro *
		327	SvSTATE_ (pTHX_ SV *coro)
		328	{
		329	HV *stash;
		330	MAGIC *mg;
		331
		332	if (SvROK (coro))
		333	coro = SvRV (coro);
		334
		335	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		336	croak ("Coro::State object required");
		337
		338	stash = SvSTASH (coro);
		339	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		340	{
		341	/* very slow, but rare, check */
		342	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		343	croak ("Coro::State object required");
		344	}
		345
		346	mg = CORO_MAGIC (coro);
		347	return (struct coro *)mg->mg_ptr;
		348	}
		349
		350	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		351
263	/* the next two functions merely cache the padlists */	352	/* the next two functions merely cache the padlists */
264	static void	353	static void
265	get_padlist (CV *cv)	354	get_padlist (pTHX_ CV *cv)
266	{	355	{
267	MAGIC *mg = CORO_MAGIC (cv);	356	MAGIC *mg = CORO_MAGIC (cv);
268	AV *av;	357	AV *av;
269		358
270	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	359	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
271	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	360	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
272	else	361	else
273	{	362	{
274	#if PREFER_PERL_FUNCTIONS	363	#if CORO_PREFER_PERL_FUNCTIONS
275	/* this is probably cleaner, but also slower? */	364	/* this is probably cleaner, but also slower? */
276	CV *cp = Perl_cv_clone (cv);	365	CV *cp = Perl_cv_clone (cv);
277	CvPADLIST (cv) = CvPADLIST (cp);	366	CvPADLIST (cv) = CvPADLIST (cp);
278	CvPADLIST (cp) = 0;	367	CvPADLIST (cp) = 0;
279	SvREFCNT_dec (cp);	368	SvREFCNT_dec (cp);
280	#else	369	#else
281	CvPADLIST (cv) = coro_clone_padlist (cv);	370	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
282	#endif	371	#endif
283	}	372	}
284	}	373	}
285		374
286	static void	375	static void
287	put_padlist (CV *cv)	376	put_padlist (pTHX_ CV *cv)
288	{	377	{
289	MAGIC *mg = CORO_MAGIC (cv);	378	MAGIC *mg = CORO_MAGIC (cv);
290	AV *av;	379	AV *av;
291		380
292	if (!mg)	381	if (expect_false (!mg))
293	{	382	{
294	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	383	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
295	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	384	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
296	mg->mg_virtual = &vtbl_coro;	385	mg->mg_virtual = &vtbl_coro;
297	mg->mg_obj = (SV *)newAV ();	386	mg->mg_obj = (SV *)newAV ();
298	}	387	}
299		388
300	av = (AV *)mg->mg_obj;	389	av = (AV *)mg->mg_obj;
301		390
302	if (AvFILLp (av) >= AvMAX (av))	391	if (expect_false (AvFILLp (av) >= AvMAX (av)))
303	av_extend (av, AvMAX (av) + 1);	392	av_extend (av, AvMAX (av) + 1);
304		393
305	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	394	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
306	}	395	}
307		396
308	#define SB do {	397	/** load & save, init *******************************************************/
309	#define SE } while (0)
310		398
311	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
312
313	static void	399	static void
314	load_perl (Coro__State c)	400	load_perl (pTHX_ Coro__State c)
315	{	401	{
316	#define VAR(name,type) PL_ ## name = c->name;	402	#define VAR(name,type) PL_ ## name = c->name;
317	# include "state.h"	403	# include "state.h"
318	#undef VAR	404	#undef VAR
319		405
320	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	406	GvSV (PL_defgv) = c->defsv;
321	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	407	GvAV (PL_defgv) = c->defav;
322	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	408	GvSV (PL_errgv) = c->errsv;
323	if (c->irssv)	409	GvSV (irsgv) = c->irssv_sv;
324	{
325	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
326	SvREFCNT_dec (c->irssv);
327	else
328	{
329	REPLACE_SV (PL_rs, c->irssv);
330	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
331	sv_setsv (c->irssv_sv, PL_rs);
332	}
333	}
334		410
335	{	411	{
336	dSP;	412	dSP;
337	CV *cv;	413	CV *cv;
338		414
339	/* now do the ugly restore mess */	415	/* now do the ugly restore mess */
340	while ((cv = (CV *)POPs))	416	while (expect_true (cv = (CV *)POPs))
341	{	417	{
342	put_padlist (cv); /* mark this padlist as available */	418	put_padlist (aTHX_ cv); /* mark this padlist as available */
343	CvDEPTH (cv) = PTR2IV (POPs);	419	CvDEPTH (cv) = PTR2IV (POPs);
344	CvPADLIST (cv) = (AV *)POPs;	420	CvPADLIST (cv) = (AV *)POPs;
345	}	421	}
346		422
347	PUTBACK;	423	PUTBACK;
348	}	424	}
349	}	425	}
350		426
351	static void	427	static void
352	save_perl (Coro__State c)	428	save_perl (pTHX_ Coro__State c)
353	{	429	{
354	{	430	{
355	dSP;	431	dSP;
356	I32 cxix = cxstack_ix;	432	I32 cxix = cxstack_ix;
357	PERL_CONTEXT *ccstk = cxstack;	433	PERL_CONTEXT *ccstk = cxstack;
…		…
360	/*	436	/*
361	* the worst thing you can imagine happens first - we have to save	437	* the worst thing you can imagine happens first - we have to save
362	* (and reinitialize) all cv's in the whole callchain :(	438	* (and reinitialize) all cv's in the whole callchain :(
363	*/	439	*/
364		440
365	EXTEND (SP, 3 + 1);
366	PUSHs (Nullsv);	441	XPUSHs (Nullsv);
367	/* this loop was inspired by pp_caller */	442	/* this loop was inspired by pp_caller */
368	for (;;)	443	for (;;)
369	{	444	{
370	while (cxix >= 0)	445	while (expect_true (cxix >= 0))
371	{	446	{
372	PERL_CONTEXT *cx = &ccstk[cxix--];	447	PERL_CONTEXT *cx = &ccstk[cxix--];
373		448
374	if (CxTYPE (cx) == CXt_SUB)	449	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
375	{	450	{
376	CV *cv = cx->blk_sub.cv;	451	CV *cv = cx->blk_sub.cv;
377		452
378	if (CvDEPTH (cv))	453	if (expect_true (CvDEPTH (cv)))
379	{	454	{
380	EXTEND (SP, 3);	455	EXTEND (SP, 3);
381	PUSHs ((SV *)CvPADLIST (cv));	456	PUSHs ((SV *)CvPADLIST (cv));
382	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	457	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
383	PUSHs ((SV *)cv);	458	PUSHs ((SV *)cv);
384		459
385	CvDEPTH (cv) = 0;	460	CvDEPTH (cv) = 0;
386	get_padlist (cv);	461	get_padlist (aTHX_ cv);
387	}	462	}
388	}	463	}
389	}	464	}
390		465
391	if (top_si->si_type == PERLSI_MAIN)	466	if (expect_true (top_si->si_type == PERLSI_MAIN))
392	break;	467	break;
393		468
394	top_si = top_si->si_prev;	469	top_si = top_si->si_prev;
395	ccstk = top_si->si_cxstack;	470	ccstk = top_si->si_cxstack;
396	cxix = top_si->si_cxix;	471	cxix = top_si->si_cxix;
397	}	472	}
398		473
399	PUTBACK;	474	PUTBACK;
400	}	475	}
401		476
402	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	477	c->defav = GvAV (PL_defgv);
403	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	478	c->defsv = DEFSV;
404	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	479	c->errsv = ERRSV;
405	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	480	c->irssv_sv = GvSV (irsgv);
406		481
407	#define VAR(name,type)c->name = PL_ ## name;	482	#define VAR(name,type)c->name = PL_ ## name;
408	# include "state.h"	483	# include "state.h"
409	#undef VAR	484	#undef VAR
410	}	485	}
…		…
413	* allocate various perl stacks. This is an exact copy	488	* allocate various perl stacks. This is an exact copy
414	* of perl.c:init_stacks, except that it uses less memory	489	* of perl.c:init_stacks, except that it uses less memory
415	* on the (sometimes correct) assumption that coroutines do	490	* on the (sometimes correct) assumption that coroutines do
416	* not usually need a lot of stackspace.	491	* not usually need a lot of stackspace.
417	*/	492	*/
418	#if PREFER_PERL_FUNCTIONS	493	#if CORO_PREFER_PERL_FUNCTIONS
419	# define coro_init_stacks init_stacks	494	# define coro_init_stacks init_stacks
420	#else	495	#else
421	static void	496	static void
422	coro_init_stacks ()	497	coro_init_stacks (pTHX)
423	{	498	{
424	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	499	PL_curstackinfo = new_stackinfo(64, 6);
425	PL_curstackinfo->si_type = PERLSI_MAIN;	500	PL_curstackinfo->si_type = PERLSI_MAIN;
426	PL_curstack = PL_curstackinfo->si_stack;	501	PL_curstack = PL_curstackinfo->si_stack;
427	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	502	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
428		503
429	PL_stack_base = AvARRAY(PL_curstack);	504	PL_stack_base = AvARRAY(PL_curstack);
430	PL_stack_sp = PL_stack_base;	505	PL_stack_sp = PL_stack_base;
431	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	506	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
432		507
433	New(50,PL_tmps_stack,128,SV*);	508	New(50,PL_tmps_stack,64,SV*);
434	PL_tmps_floor = -1;	509	PL_tmps_floor = -1;
435	PL_tmps_ix = -1;	510	PL_tmps_ix = -1;
436	PL_tmps_max = 128;	511	PL_tmps_max = 64;
437		512
438	New(54,PL_markstack,32,I32);	513	New(54,PL_markstack,16,I32);
439	PL_markstack_ptr = PL_markstack;	514	PL_markstack_ptr = PL_markstack;
440	PL_markstack_max = PL_markstack + 32;	515	PL_markstack_max = PL_markstack + 16;
441		516
442	#ifdef SET_MARK_OFFSET	517	#ifdef SET_MARK_OFFSET
443	SET_MARK_OFFSET;	518	SET_MARK_OFFSET;
444	#endif	519	#endif
445		520
446	New(54,PL_scopestack,32,I32);	521	New(54,PL_scopestack,16,I32);
447	PL_scopestack_ix = 0;	522	PL_scopestack_ix = 0;
448	PL_scopestack_max = 32;	523	PL_scopestack_max = 16;
449		524
450	New(54,PL_savestack,64,ANY);	525	New(54,PL_savestack,64,ANY);
451	PL_savestack_ix = 0;	526	PL_savestack_ix = 0;
452	PL_savestack_max = 64;	527	PL_savestack_max = 64;
453		528
454	#if !PERL_VERSION_ATLEAST (5,9,0)	529	#if !PERL_VERSION_ATLEAST (5,9,0)
455	New(54,PL_retstack,16,OP*);	530	New(54,PL_retstack,4,OP*);
456	PL_retstack_ix = 0;	531	PL_retstack_ix = 0;
457	PL_retstack_max = 16;	532	PL_retstack_max = 4;
458	#endif	533	#endif
459	}	534	}
460	#endif	535	#endif
461		536
462	/*	537	/*
463	* destroy the stacks, the callchain etc...	538	* destroy the stacks, the callchain etc...
464	*/	539	*/
465	static void	540	static void
466	coro_destroy_stacks ()	541	coro_destroy_stacks (pTHX)
467	{	542	{
468	if (!IN_DESTRUCT)
469	{
470	/* restore all saved variables and stuff */
471	LEAVE_SCOPE (0);
472	assert (PL_tmps_floor == -1);
473
474	/* free all temporaries */
475	FREETMPS;
476	assert (PL_tmps_ix == -1);
477
478	/* unwind all extra stacks */
479	POPSTACK_TO (PL_mainstack);
480
481	/* unwind main stack */
482	dounwind (-1);
483	}
484
485	while (PL_curstackinfo->si_next)	543	while (PL_curstackinfo->si_next)
486	PL_curstackinfo = PL_curstackinfo->si_next;	544	PL_curstackinfo = PL_curstackinfo->si_next;
487		545
488	while (PL_curstackinfo)	546	while (PL_curstackinfo)
489	{	547	{
…		…
504	#if !PERL_VERSION_ATLEAST (5,9,0)	562	#if !PERL_VERSION_ATLEAST (5,9,0)
505	Safefree (PL_retstack);	563	Safefree (PL_retstack);
506	#endif	564	#endif
507	}	565	}
508		566
509	static void	567	static size_t
510	setup_coro (struct coro *coro)	568	coro_rss (pTHX_ struct coro *coro)
		569	{
		570	size_t rss = sizeof (*coro);
		571
		572	if (coro->mainstack)
		573	{
		574	if (coro->flags & CF_RUNNING)
		575	{
		576	#define VAR(name,type)coro->name = PL_ ## name;
		577	# include "state.h"
		578	#undef VAR
		579	}
		580
		581	rss += sizeof (coro->curstackinfo);
		582	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		583	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		584	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		585	rss += coro->tmps_max * sizeof (SV *);
		586	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		587	rss += coro->scopestack_max * sizeof (I32);
		588	rss += coro->savestack_max * sizeof (ANY);
		589
		590	#if !PERL_VERSION_ATLEAST (5,9,0)
		591	rss += coro->retstack_max * sizeof (OP *);
		592	#endif
		593	}
		594
		595	return rss;
		596	}
		597
		598	/** coroutine stack handling ************************************************/
		599
		600	static void
		601	coro_setup (pTHX_ struct coro *coro)
511	{	602	{
512	/*	603	/*
513	* emulate part of the perl startup here.	604	* emulate part of the perl startup here.
514	*/	605	*/
515
516	coro_init_stacks ();	606	coro_init_stacks (aTHX);
517		607
		608	PL_runops = RUNOPS_DEFAULT;
518	PL_curcop = &PL_compiling;	609	PL_curcop = &PL_compiling;
519	PL_in_eval = EVAL_NULL;	610	PL_in_eval = EVAL_NULL;
		611	PL_comppad = 0;
520	PL_curpm = 0;	612	PL_curpm = 0;
		613	PL_curpad = 0;
521	PL_localizing = 0;	614	PL_localizing = 0;
522	PL_dirty = 0;	615	PL_dirty = 0;
523	PL_restartop = 0;	616	PL_restartop = 0;
		617
		618	GvSV (PL_defgv) = newSV (0);
		619	GvAV (PL_defgv) = coro->args; coro->args = 0;
		620	GvSV (PL_errgv) = newSV (0);
		621	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		622	PL_rs = newSVsv (GvSV (irsgv));
		623	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
524		624
525	{	625	{
526	dSP;	626	dSP;
527	LOGOP myop;	627	LOGOP myop;
528		628
529	SvREFCNT_dec (GvAV (PL_defgv));
530	GvAV (PL_defgv) = coro->args; coro->args = 0;
531
532	Zero (&myop, 1, LOGOP);	629	Zero (&myop, 1, LOGOP);
533	myop.op_next = Nullop;	630	myop.op_next = Nullop;
534	myop.op_flags = OPf_WANT_VOID;	631	myop.op_flags = OPf_WANT_VOID;
535		632
536	PUSHMARK (SP);	633	PUSHMARK (SP);
537	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	634	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
538	PUTBACK;	635	PUTBACK;
539	PL_op = (OP *)&myop;	636	PL_op = (OP *)&myop;
540	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	637	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
541	SPAGAIN;	638	SPAGAIN;
542	}	639	}
543		640
544	ENTER; /* necessary e.g. for dounwind */	641	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
545	}	642	}
546		643
547	static void	644	static void
		645	coro_destroy (pTHX_ struct coro *coro)
		646	{
		647	if (!IN_DESTRUCT)
		648	{
		649	/* restore all saved variables and stuff */
		650	LEAVE_SCOPE (0);
		651	assert (PL_tmps_floor == -1);
		652
		653	/* free all temporaries */
		654	FREETMPS;
		655	assert (PL_tmps_ix == -1);
		656
		657	/* unwind all extra stacks */
		658	POPSTACK_TO (PL_mainstack);
		659
		660	/* unwind main stack */
		661	dounwind (-1);
		662	}
		663
		664	SvREFCNT_dec (GvSV (PL_defgv));
		665	SvREFCNT_dec (GvAV (PL_defgv));
		666	SvREFCNT_dec (GvSV (PL_errgv));
		667	SvREFCNT_dec (PL_defoutgv);
		668	SvREFCNT_dec (PL_rs);
		669	SvREFCNT_dec (GvSV (irsgv));
		670
		671	SvREFCNT_dec (coro->saved_deffh);
		672	SvREFCNT_dec (coro->throw);
		673
		674	coro_destroy_stacks (aTHX);
		675	}
		676
		677	static void
548	free_coro_mortal ()	678	free_coro_mortal (pTHX)
549	{	679	{
550	if (coro_mortal)	680	if (expect_true (coro_mortal))
551	{	681	{
552	SvREFCNT_dec (coro_mortal);	682	SvREFCNT_dec (coro_mortal);
553	coro_mortal = 0;	683	coro_mortal = 0;
554	}	684	}
555	}	685	}
556		686
		687	static int
		688	runops_trace (pTHX)
		689	{
		690	COP *oldcop = 0;
		691	int oldcxix = -2;
		692	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		693	coro_cctx *cctx = coro->cctx;
		694
		695	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		696	{
		697	PERL_ASYNC_CHECK ();
		698
		699	if (cctx->flags & CC_TRACE_ALL)
		700	{
		701	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		702	{
		703	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		704	SV **bot, **top;
		705	AV *av = newAV (); /* return values */
		706	SV **cb;
		707	dSP;
		708
		709	GV *gv = CvGV (cx->blk_sub.cv);
		710	SV *fullname = sv_2mortal (newSV (0));
		711	if (isGV (gv))
		712	gv_efullname3 (fullname, gv, 0);
		713
		714	bot = PL_stack_base + cx->blk_oldsp + 1;
		715	top = cx->blk_gimme == G_ARRAY ? SP + 1
		716	: cx->blk_gimme == G_SCALAR ? bot + 1
		717	: bot;
		718
		719	av_extend (av, top - bot);
		720	while (bot < top)
		721	av_push (av, SvREFCNT_inc (*bot++));
		722
		723	PL_runops = RUNOPS_DEFAULT;
		724	ENTER;
		725	SAVETMPS;
		726	EXTEND (SP, 3);
		727	PUSHMARK (SP);
		728	PUSHs (&PL_sv_no);
		729	PUSHs (fullname);
		730	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		731	PUTBACK;
		732	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		733	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		734	SPAGAIN;
		735	FREETMPS;
		736	LEAVE;
		737	PL_runops = runops_trace;
		738	}
		739
		740	if (oldcop != PL_curcop)
		741	{
		742	oldcop = PL_curcop;
		743
		744	if (PL_curcop != &PL_compiling)
		745	{
		746	SV **cb;
		747
		748	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		749	{
		750	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		751
		752	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		753	{
		754	runops_proc_t old_runops = PL_runops;
		755	dSP;
		756	GV *gv = CvGV (cx->blk_sub.cv);
		757	SV *fullname = sv_2mortal (newSV (0));
		758
		759	if (isGV (gv))
		760	gv_efullname3 (fullname, gv, 0);
		761
		762	PL_runops = RUNOPS_DEFAULT;
		763	ENTER;
		764	SAVETMPS;
		765	EXTEND (SP, 3);
		766	PUSHMARK (SP);
		767	PUSHs (&PL_sv_yes);
		768	PUSHs (fullname);
		769	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		770	PUTBACK;
		771	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		772	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		773	SPAGAIN;
		774	FREETMPS;
		775	LEAVE;
		776	PL_runops = runops_trace;
		777	}
		778
		779	oldcxix = cxstack_ix;
		780	}
		781
		782	if (cctx->flags & CC_TRACE_LINE)
		783	{
		784	dSP;
		785
		786	PL_runops = RUNOPS_DEFAULT;
		787	ENTER;
		788	SAVETMPS;
		789	EXTEND (SP, 3);
		790	PL_runops = RUNOPS_DEFAULT;
		791	PUSHMARK (SP);
		792	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		793	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		794	PUTBACK;
		795	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		796	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		797	SPAGAIN;
		798	FREETMPS;
		799	LEAVE;
		800	PL_runops = runops_trace;
		801	}
		802	}
		803	}
		804	}
		805	}
		806
		807	TAINT_NOT;
		808	return 0;
		809	}
		810
557	/* inject a fake call to Coro::State::_cctx_init into the execution */	811	/* inject a fake call to Coro::State::_cctx_init into the execution */
		812	/* _cctx_init should be careful, as it could be called at almost any time */
		813	/* during execution of a perl program */
558	static void NOINLINE	814	static void NOINLINE
559	prepare_cctx (coro_cctx *cctx)	815	prepare_cctx (pTHX_ coro_cctx *cctx)
560	{	816	{
561	dSP;	817	dSP;
562	LOGOP myop;	818	LOGOP myop;
		819
		820	PL_top_env = &PL_start_env;
		821
		822	if (cctx->flags & CC_TRACE)
		823	PL_runops = runops_trace;
563		824
564	Zero (&myop, 1, LOGOP);	825	Zero (&myop, 1, LOGOP);
565	myop.op_next = PL_op;	826	myop.op_next = PL_op;
566	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	827	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
567		828
…		…
573	PL_op = (OP *)&myop;	834	PL_op = (OP *)&myop;
574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	835	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
575	SPAGAIN;	836	SPAGAIN;
576	}	837	}
577		838
		839	/*
		840	* this is a _very_ stripped down perl interpreter ;)
		841	*/
578	static void	842	static void
579	coro_run (void *arg)	843	coro_run (void *arg)
580	{	844	{
		845	dTHX;
		846
581	/* coro_run is the alternative tail of transfer(), so unlock here. */	847	/* coro_run is the alternative tail of transfer(), so unlock here. */
582	UNLOCK;	848	UNLOCK;
583		849
584	/*	850	/* we now skip the entersub that lead to transfer() */
585	* this is a _very_ stripped down perl interpreter ;)	851	PL_op = PL_op->op_next;
586	*/
587	PL_top_env = &PL_start_env;
588		852
589	/* inject call to cctx_init */	853	/* inject a fake subroutine call to cctx_init */
590	prepare_cctx ((coro_cctx *)arg);	854	prepare_cctx (aTHX_ (coro_cctx *)arg);
591		855
592	/* somebody will hit me for both perl_run and PL_restartop */	856	/* somebody or something will hit me for both perl_run and PL_restartop */
593	PL_restartop = PL_op;	857	PL_restartop = PL_op;
594	perl_run (PL_curinterp);	858	perl_run (PL_curinterp);
595		859
596	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	860	/*
597	abort ();	861	* If perl-run returns we assume exit() was being called or the coro
		862	* fell off the end, which seems to be the only valid (non-bug)
		863	* reason for perl_run to return. We try to exit by jumping to the
		864	* bootstrap-time "top" top_env, as we cannot restore the "main"
		865	* coroutine as Coro has no such concept
		866	*/
		867	PL_top_env = main_top_env;
		868	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
598	}	869	}
599		870
600	static coro_cctx *	871	static coro_cctx *
601	cctx_new ()	872	cctx_new ()
602	{	873	{
603	coro_cctx *cctx;	874	coro_cctx *cctx;
		875	void *stack_start;
		876	size_t stack_size;
604		877
605	++cctx_count;	878	++cctx_count;
606		879
607	Newz (0, cctx, 1, coro_cctx);	880	Newz (0, cctx, 1, coro_cctx);
608		881
609	#if HAVE_MMAP	882	#if HAVE_MMAP
610		883
611	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	884	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
612	/* mmap supposedly does allocate-on-write for us */	885	/* mmap supposedly does allocate-on-write for us */
613	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	886	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
614		887
615	if (cctx->sptr == (void *)-1)	888	if (cctx->sptr != (void *)-1)
616	{
617	perror ("FATAL: unable to mmap stack for coroutine");
618	_exit (EXIT_FAILURE);
619	}	889	{
620
621	# if STACKGUARD	890	# if CORO_STACKGUARD
622	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	891	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
623	# endif	892	# endif
		893	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		894	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		895	cctx->flags |= CC_MAPPED;
		896	}
		897	else
		898	#endif
		899	{
		900	cctx->ssize = coro_stacksize * (long)sizeof (long);
		901	New (0, cctx->sptr, coro_stacksize, long);
624		902
625	#else
626
627	cctx->ssize = STACKSIZE * (long)sizeof (long);
628	New (0, cctx->sptr, STACKSIZE, long);
629
630	if (!cctx->sptr)	903	if (!cctx->sptr)
631	{	904	{
632	perror ("FATAL: unable to malloc stack for coroutine");	905	perror ("FATAL: unable to allocate stack for coroutine");
633	_exit (EXIT_FAILURE);	906	_exit (EXIT_FAILURE);
634	}	907	}
635		908
636	#endif	909	stack_start = cctx->sptr;
		910	stack_size = cctx->ssize;
		911	}
637		912
638	#if USE_VALGRIND	913	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
639	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
640	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
641	cctx->ssize + (char *)cctx->sptr
642	);
643	#endif
644
645	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	914	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
646		915
647	return cctx;	916	return cctx;
648	}	917	}
649		918
650	static void	919	static void
…		…
653	if (!cctx)	922	if (!cctx)
654	return;	923	return;
655		924
656	--cctx_count;	925	--cctx_count;
657		926
658	#if USE_VALGRIND	927	#if CORO_USE_VALGRIND
659	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	928	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
660	#endif	929	#endif
661		930
662	#if HAVE_MMAP	931	#if HAVE_MMAP
		932	if (cctx->flags & CC_MAPPED)
663	munmap (cctx->sptr, cctx->ssize);	933	munmap (cctx->sptr, cctx->ssize);
664	#else	934	else
		935	#endif
665	Safefree (cctx->sptr);	936	Safefree (cctx->sptr);
666	#endif
667		937
668	Safefree (cctx);	938	Safefree (cctx);
669	}	939	}
670		940
		941	/* wether this cctx should be destructed */
		942	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		943
671	static coro_cctx *	944	static coro_cctx *
672	cctx_get ()	945	cctx_get (pTHX)
673	{	946	{
674	coro_cctx *cctx;	947	while (expect_true (cctx_first))
675
676	if (cctx_first)
677	{	948	{
678	cctx = cctx_first;	949	coro_cctx *cctx = cctx_first;
679	cctx_first = cctx->next;	950	cctx_first = cctx->next;
680	--cctx_idle;	951	--cctx_idle;
681	}	952
682	else	953	if (expect_true (!CCTX_EXPIRED (cctx)))
683	{	954	return cctx;
684	cctx = cctx_new ();	955
685	PL_op = PL_op->op_next;	956	cctx_destroy (cctx);
686	}	957	}
687		958
688	return cctx;	959	return cctx_new ();
689	}	960	}
690		961
691	static void	962	static void
692	cctx_put (coro_cctx *cctx)	963	cctx_put (coro_cctx *cctx)
693	{	964	{
694	/* free another cctx if overlimit */	965	/* free another cctx if overlimit */
695	if (cctx_idle >= MAX_IDLE_CCTX)	966	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
696	{	967	{
697	coro_cctx *first = cctx_first;	968	coro_cctx *first = cctx_first;
698	cctx_first = first->next;	969	cctx_first = first->next;
699	--cctx_idle;	970	--cctx_idle;
700		971
701	assert (!first->inuse);
702	cctx_destroy (first);	972	cctx_destroy (first);
703	}	973	}
704		974
705	++cctx_idle;	975	++cctx_idle;
706	cctx->next = cctx_first;	976	cctx->next = cctx_first;
707	cctx_first = cctx;	977	cctx_first = cctx;
708	}	978	}
709		979
710	/* never call directly, always through the coro_state_transfer global variable */	980	/** coroutine switching *****************************************************/
		981
		982	static void
		983	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		984	{
		985	if (expect_true (prev != next))
		986	{
		987	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		988	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		989
		990	if (expect_false (next->flags & CF_RUNNING))
		991	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		992
		993	if (expect_false (next->flags & CF_DESTROYED))
		994	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		995
		996	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		997	croak ("Coro::State::transfer called while parsing, but this is not supported");
		998	}
		999	}
		1000
		1001	/* always use the TRANSFER macro */
711	static void NOINLINE	1002	static void NOINLINE
712	transfer (struct coro *prev, struct coro *next)	1003	transfer (pTHX_ struct coro *prev, struct coro *next)
713	{	1004	{
714	dSTACKLEVEL;	1005	dSTACKLEVEL;
715		1006
716	/* sometimes transfer is only called to set idle_sp */	1007	/* sometimes transfer is only called to set idle_sp */
717	if (!next)	1008	if (expect_false (!next))
718	{	1009	{
719	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1010	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
720	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1011	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
721	}	1012	}
722	else if (prev != next)	1013	else if (expect_true (prev != next))
723	{	1014	{
724	coro_cctx *prev__cctx;	1015	coro_cctx *prev__cctx;
725		1016
726	if (prev->flags & CF_NEW)	1017	if (expect_false (prev->flags & CF_NEW))
727	{	1018	{
728	/* create a new empty context */	1019	/* create a new empty context */
729	Newz (0, prev->cctx, 1, coro_cctx);	1020	Newz (0, prev->cctx, 1, coro_cctx);
730	prev->cctx->inuse = 1;
731	prev->flags &= ~CF_NEW;	1021	prev->flags &= ~CF_NEW;
732	prev->flags |= CF_RUNNING;	1022	prev->flags |= CF_RUNNING;
733	}	1023	}
734		1024
735	/*TODO: must not croak here */
736	if (!prev->flags & CF_RUNNING)
737	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
738
739	if (next->flags & CF_RUNNING)
740	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
741
742	if (next->flags & CF_DESTROYED)
743	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
744
745	prev->flags &= ~CF_RUNNING;	1025	prev->flags &= ~CF_RUNNING;
746	next->flags |= CF_RUNNING;	1026	next->flags |= CF_RUNNING;
747		1027
748	LOCK;	1028	LOCK;
749		1029
750	if (next->flags & CF_NEW)	1030	if (expect_false (next->flags & CF_NEW))
751	{	1031	{
752	/* need to start coroutine */	1032	/* need to start coroutine */
753	next->flags &= ~CF_NEW;	1033	next->flags &= ~CF_NEW;
754	/* first get rid of the old state */	1034	/* first get rid of the old state */
755	save_perl (prev);	1035	save_perl (aTHX_ prev);
756	/* setup coroutine call */	1036	/* setup coroutine call */
757	setup_coro (next);	1037	coro_setup (aTHX_ next);
758	/* need a new stack */
759	assert (!next->cctx);
760	}	1038	}
761	else	1039	else
762	{	1040	{
763	/* coroutine already started */	1041	/* coroutine already started */
764	save_perl (prev);	1042	save_perl (aTHX_ prev);
765	load_perl (next);	1043	load_perl (aTHX_ next);
766	}	1044	}
767		1045
768	prev__cctx = prev->cctx;	1046	prev__cctx = prev->cctx;
769		1047
770	/* possibly "free" the cctx */	1048	/* possibly "free" the cctx */
771	if (prev__cctx->idle_sp == STACKLEVEL)	1049	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
772	{	1050	{
773	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1051	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
774	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));	1052	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
775		1053
776	prev->cctx = 0;	1054	prev->cctx = 0;
777		1055
		1056	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1057	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1058	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1059	next->cctx = cctx_get (aTHX);
		1060
778	cctx_put (prev__cctx);	1061	cctx_put (prev__cctx);
779	prev__cctx->inuse = 0;
780	}	1062	}
781		1063
		1064	++next->usecount;
		1065
782	if (!next->cctx)	1066	if (expect_true (!next->cctx))
783	{
784	next->cctx = cctx_get ();	1067	next->cctx = cctx_get (aTHX);
785	assert (!next->cctx->inuse);
786	next->cctx->inuse = 1;
787	}
788		1068
789	if (prev__cctx != next->cctx)	1069	if (expect_false (prev__cctx != next->cctx))
790	{	1070	{
791	prev__cctx->top_env = PL_top_env;	1071	prev__cctx->top_env = PL_top_env;
792	PL_top_env = next->cctx->top_env;	1072	PL_top_env = next->cctx->top_env;
793	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1073	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
794	}	1074	}
795		1075
796	free_coro_mortal ();	1076	free_coro_mortal (aTHX);
797	UNLOCK;	1077	UNLOCK;
		1078
		1079	if (expect_false (prev->throw || next->throw))
		1080	{
		1081	struct coro *coro = SvSTATE (coro_current);
		1082
		1083	if (coro->throw)
		1084	{
		1085	SV *exception = coro->throw;
		1086	coro->throw = 0;
		1087	sv_setsv (ERRSV, exception);
		1088	croak (0);
		1089	}
		1090	}
798	}	1091	}
799	}	1092	}
800		1093
801	struct transfer_args	1094	struct transfer_args
802	{	1095	{
803	struct coro *prev, *next;	1096	struct coro *prev, *next;
804	};	1097	};
805		1098
806	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1099	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1100	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1101
		1102	/** high level stuff ********************************************************/
807		1103
808	static int	1104	static int
809	coro_state_destroy (struct coro *coro)	1105	coro_state_destroy (pTHX_ struct coro *coro)
810	{	1106	{
811	if (coro->flags & CF_DESTROYED)	1107	if (coro->flags & CF_DESTROYED)
812	return 0;	1108	return 0;
813		1109
814	coro->flags |= CF_DESTROYED;	1110	coro->flags |= CF_DESTROYED;
		1111
		1112	if (coro->flags & CF_READY)
		1113	{
		1114	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1115	/* alternative: look through all ready queues and remove the coro */
		1116	LOCK;
		1117	--coro_nready;
		1118	UNLOCK;
		1119	}
		1120	else
		1121	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
815		1122
816	if (coro->mainstack && coro->mainstack != main_mainstack)	1123	if (coro->mainstack && coro->mainstack != main_mainstack)
817	{	1124	{
818	assert (!(coro->flags & CF_RUNNING));
819
820	struct coro temp;	1125	struct coro temp;
821	Zero (&temp, 1, struct coro);
822	temp.save = CORO_SAVE_ALL;
823		1126
824	if (coro->flags & CF_RUNNING)	1127	if (coro->flags & CF_RUNNING)
825	croak ("FATAL: tried to destroy currently running coroutine");	1128	croak ("FATAL: tried to destroy currently running coroutine");
826		1129
827	save_perl (&temp);	1130	save_perl (aTHX_ &temp);
828	load_perl (coro);	1131	load_perl (aTHX_ coro);
829		1132
830	coro_destroy_stacks ();	1133	coro_destroy (aTHX_ coro);
831		1134
832	load_perl (&temp); /* this will get rid of defsv etc.. */	1135	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
833		1136
834	coro->mainstack = 0;	1137	coro->mainstack = 0;
835	}	1138	}
836		1139
837	cctx_destroy (coro->cctx);	1140	cctx_destroy (coro->cctx);
838	SvREFCNT_dec (coro->args);	1141	SvREFCNT_dec (coro->args);
839		1142
		1143	if (coro->next) coro->next->prev = coro->prev;
		1144	if (coro->prev) coro->prev->next = coro->next;
		1145	if (coro == coro_first) coro_first = coro->next;
		1146
840	return 1;	1147	return 1;
841	}	1148	}
842		1149
843	static int	1150	static int
844	coro_state_free (pTHX_ SV *sv, MAGIC *mg)	1151	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
845	{	1152	{
846	struct coro *coro = (struct coro *)mg->mg_ptr;	1153	struct coro *coro = (struct coro *)mg->mg_ptr;
847	mg->mg_ptr = 0;	1154	mg->mg_ptr = 0;
848		1155
		1156	coro->hv = 0;
		1157
849	if (--coro->refcnt < 0)	1158	if (--coro->refcnt < 0)
850	{	1159	{
851	coro_state_destroy (coro);	1160	coro_state_destroy (aTHX_ coro);
852	Safefree (coro);	1161	Safefree (coro);
853	}	1162	}
854		1163
855	return 0;	1164	return 0;
856	}	1165	}
…		…
874	#else	1183	#else
875	# define MGf_DUP 0	1184	# define MGf_DUP 0
876	#endif	1185	#endif
877	};	1186	};
878		1187
879	static struct coro *
880	SvSTATE (SV *coro)
881	{
882	HV *stash;
883	MAGIC *mg;
884
885	if (SvROK (coro))
886	coro = SvRV (coro);
887
888	stash = SvSTASH (coro);
889	if (stash != coro_stash && stash != coro_state_stash)
890	{
891	/* very slow, but rare, check */
892	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
893	croak ("Coro::State object required");
894	}
895
896	mg = SvMAGIC (coro);
897	assert (mg->mg_type == PERL_MAGIC_ext);
898	return (struct coro *)mg->mg_ptr;
899	}
900
901	static void	1188	static void
902	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)	1189	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
903	{	1190	{
904	ta->prev = SvSTATE (prev_sv);	1191	ta->prev = SvSTATE (prev_sv);
905	ta->next = SvSTATE (next_sv);	1192	ta->next = SvSTATE (next_sv);
		1193	TRANSFER_CHECK (*ta);
906	}	1194	}
907		1195
908	static void	1196	static void
909	api_transfer (SV *prev_sv, SV *next_sv)	1197	api_transfer (SV *prev_sv, SV *next_sv)
910	{	1198	{
		1199	dTHX;
911	struct transfer_args ta;	1200	struct transfer_args ta;
912		1201
913	prepare_transfer (&ta, prev_sv, next_sv);	1202	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
914	TRANSFER (ta);	1203	TRANSFER (ta);
915	}	1204	}
916		1205
917	static int
918	api_save (SV *coro_sv, int new_save)
919	{
920	struct coro *coro = SvSTATE (coro_sv);
921	int old_save = coro->save;
922
923	if (new_save >= 0)
924	coro->save = new_save;
925
926	return old_save;
927	}
928
929	/** Coro ********************************************************************/	1206	/** Coro ********************************************************************/
930		1207
931	#define PRIO_MAX 3
932	#define PRIO_HIGH 1
933	#define PRIO_NORMAL 0
934	#define PRIO_LOW -1
935	#define PRIO_IDLE -3
936	#define PRIO_MIN -4
937
938	/* for Coro.pm */
939	static SV *coro_current;
940	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
941	static int coro_nready;
942
943	static void	1208	static void
944	coro_enq (SV *coro_sv)	1209	coro_enq (pTHX_ SV *coro_sv)
945	{	1210	{
946	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1211	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
947	coro_nready++;
948	}	1212	}
949		1213
950	static SV *	1214	static SV *
951	coro_deq (int min_prio)	1215	coro_deq (pTHX_ int min_prio)
952	{	1216	{
953	int prio = PRIO_MAX - PRIO_MIN;	1217	int prio = PRIO_MAX - PRIO_MIN;
954		1218
955	min_prio -= PRIO_MIN;	1219	min_prio -= PRIO_MIN;
956	if (min_prio < 0)	1220	if (min_prio < 0)
957	min_prio = 0;	1221	min_prio = 0;
958		1222
959	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1223	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
960	if (AvFILLp (coro_ready [prio]) >= 0)	1224	if (AvFILLp (coro_ready [prio]) >= 0)
961	{
962	coro_nready--;
963	return av_shift (coro_ready [prio]);	1225	return av_shift (coro_ready [prio]);
964	}
965		1226
966	return 0;	1227	return 0;
967	}	1228	}
968		1229
969	static int	1230	static int
970	api_ready (SV *coro_sv)	1231	api_ready (SV *coro_sv)
971	{	1232	{
		1233	dTHX;
972	struct coro *coro;	1234	struct coro *coro;
973		1235
974	if (SvROK (coro_sv))	1236	if (SvROK (coro_sv))
975	coro_sv = SvRV (coro_sv);	1237	coro_sv = SvRV (coro_sv);
976		1238
…		…
980	return 0;	1242	return 0;
981		1243
982	coro->flags |= CF_READY;	1244	coro->flags |= CF_READY;
983		1245
984	LOCK;	1246	LOCK;
985	coro_enq (SvREFCNT_inc (coro_sv));	1247	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1248	++coro_nready;
986	UNLOCK;	1249	UNLOCK;
987		1250
988	return 1;	1251	return 1;
989	}	1252	}
990		1253
991	static int	1254	static int
992	api_is_ready (SV *coro_sv)	1255	api_is_ready (SV *coro_sv)
993	{	1256	{
		1257	dTHX;
994	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1258	return !!(SvSTATE (coro_sv)->flags & CF_READY);
995	}	1259	}
996		1260
997	static void	1261	static void
998	prepare_schedule (struct transfer_args *ta)	1262	prepare_schedule (pTHX_ struct transfer_args *ta)
999	{	1263	{
1000	SV *prev_sv, *next_sv;	1264	SV *prev_sv, *next_sv;
1001		1265
1002	for (;;)	1266	for (;;)
1003	{	1267	{
1004	LOCK;	1268	LOCK;
1005	next_sv = coro_deq (PRIO_MIN);	1269	next_sv = coro_deq (aTHX_ PRIO_MIN);
1006	UNLOCK;
1007		1270
1008	/* nothing to schedule: call the idle handler */	1271	/* nothing to schedule: call the idle handler */
1009	if (!next_sv)	1272	if (expect_false (!next_sv))
1010	{	1273	{
1011	dSP;	1274	dSP;
		1275	UNLOCK;
1012		1276
1013	ENTER;	1277	ENTER;
1014	SAVETMPS;	1278	SAVETMPS;
1015		1279
1016	PUSHMARK (SP);	1280	PUSHMARK (SP);
…		…
1023	}	1287	}
1024		1288
1025	ta->next = SvSTATE (next_sv);	1289	ta->next = SvSTATE (next_sv);
1026		1290
1027	/* cannot transfer to destroyed coros, skip and look for next */	1291	/* cannot transfer to destroyed coros, skip and look for next */
1028	if (ta->next->flags & CF_DESTROYED)	1292	if (expect_false (ta->next->flags & CF_DESTROYED))
1029	{	1293	{
		1294	UNLOCK;
1030	SvREFCNT_dec (next_sv);	1295	SvREFCNT_dec (next_sv);
		1296	/* coro_nready is already taken care of by destroy */
1031	continue;	1297	continue;
1032	}	1298	}
1033		1299
		1300	--coro_nready;
		1301	UNLOCK;
1034	break;	1302	break;
1035	}	1303	}
1036		1304
1037	/* free this only after the transfer */	1305	/* free this only after the transfer */
1038	prev_sv = SvRV (coro_current);	1306	prev_sv = SvRV (coro_current);
1039	SvRV_set (coro_current, next_sv);
1040	ta->prev = SvSTATE (prev_sv);	1307	ta->prev = SvSTATE (prev_sv);
1041		1308	TRANSFER_CHECK (*ta);
1042	assert (ta->next->flags & CF_READY);	1309	assert (ta->next->flags & CF_READY);
1043	ta->next->flags &= ~CF_READY;	1310	ta->next->flags &= ~CF_READY;
		1311	SvRV_set (coro_current, next_sv);
1044		1312
1045	LOCK;	1313	LOCK;
1046	free_coro_mortal ();	1314	free_coro_mortal (aTHX);
1047	coro_mortal = prev_sv;	1315	coro_mortal = prev_sv;
1048	UNLOCK;	1316	UNLOCK;
1049	}	1317	}
1050		1318
1051	static void	1319	static void
1052	prepare_cede (struct transfer_args *ta)	1320	prepare_cede (pTHX_ struct transfer_args *ta)
1053	{	1321	{
1054	api_ready (coro_current);	1322	api_ready (coro_current);
1055	prepare_schedule (ta);	1323	prepare_schedule (aTHX_ ta);
1056	}	1324	}
1057		1325
1058	static int	1326	static int
1059	prepare_cede_notself (struct transfer_args *ta)	1327	prepare_cede_notself (pTHX_ struct transfer_args *ta)
1060	{	1328	{
1061	if (coro_nready)	1329	if (coro_nready)
1062	{	1330	{
1063	SV *prev = SvRV (coro_current);	1331	SV *prev = SvRV (coro_current);
1064	prepare_schedule (ta);	1332	prepare_schedule (aTHX_ ta);
1065	api_ready (prev);	1333	api_ready (prev);
1066	return 1;	1334	return 1;
1067	}	1335	}
1068	else	1336	else
1069	return 0;	1337	return 0;
1070	}	1338	}
1071		1339
1072	static void	1340	static void
1073	api_schedule (void)	1341	api_schedule (void)
1074	{	1342	{
		1343	dTHX;
1075	struct transfer_args ta;	1344	struct transfer_args ta;
1076		1345
1077	prepare_schedule (&ta);	1346	prepare_schedule (aTHX_ &ta);
1078	TRANSFER (ta);	1347	TRANSFER (ta);
1079	}	1348	}
1080		1349
1081	static int	1350	static int
1082	api_cede (void)	1351	api_cede (void)
1083	{	1352	{
		1353	dTHX;
1084	struct transfer_args ta;	1354	struct transfer_args ta;
1085		1355
1086	prepare_cede (&ta);	1356	prepare_cede (aTHX_ &ta);
1087		1357
1088	if (ta.prev != ta.next)	1358	if (expect_true (ta.prev != ta.next))
1089	{	1359	{
1090	TRANSFER (ta);	1360	TRANSFER (ta);
1091	return 1;	1361	return 1;
1092	}	1362	}
1093	else	1363	else
…		…
1095	}	1365	}
1096		1366
1097	static int	1367	static int
1098	api_cede_notself (void)	1368	api_cede_notself (void)
1099	{	1369	{
		1370	dTHX;
1100	struct transfer_args ta;	1371	struct transfer_args ta;
1101		1372
1102	if (prepare_cede_notself (&ta))	1373	if (prepare_cede_notself (aTHX_ &ta))
1103	{	1374	{
1104	TRANSFER (ta);	1375	TRANSFER (ta);
1105	return 1;	1376	return 1;
1106	}	1377	}
1107	else	1378	else
1108	return 0;	1379	return 0;
1109	}	1380	}
1110		1381
		1382	static void
		1383	api_trace (SV *coro_sv, int flags)
		1384	{
		1385	dTHX;
		1386	struct coro *coro = SvSTATE (coro_sv);
		1387
		1388	if (flags & CC_TRACE)
		1389	{
		1390	if (!coro->cctx)
		1391	coro->cctx = cctx_new ();
		1392	else if (!(coro->cctx->flags & CC_TRACE))
		1393	croak ("cannot enable tracing on coroutine with custom stack");
		1394
		1395	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1396	}
		1397	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1398	{
		1399	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1400
		1401	if (coro->flags & CF_RUNNING)
		1402	PL_runops = RUNOPS_DEFAULT;
		1403	else
		1404	coro->runops = RUNOPS_DEFAULT;
		1405	}
		1406	}
		1407
1111	MODULE = Coro::State PACKAGE = Coro::State	1408	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1112		1409
1113	PROTOTYPES: DISABLE	1410	PROTOTYPES: DISABLE
1114		1411
1115	BOOT:	1412	BOOT:
1116	{	1413	{
1117	#ifdef USE_ITHREADS	1414	#ifdef USE_ITHREADS
1118	MUTEX_INIT (&coro_mutex);	1415	MUTEX_INIT (&coro_mutex);
1119	#endif	1416	#endif
1120	BOOT_PAGESIZE;	1417	BOOT_PAGESIZE;
1121		1418
		1419	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1420	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1421
1122	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1422	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1123		1423
		1424	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1425	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1124	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1426	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1125	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1126	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1127	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1128	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1427	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1129		1428
1130	main_mainstack = PL_mainstack;	1429	main_mainstack = PL_mainstack;
		1430	main_top_env = PL_top_env;
		1431
		1432	while (main_top_env->je_prev)
		1433	main_top_env = main_top_env->je_prev;
1131		1434
1132	coroapi.ver = CORO_API_VERSION;	1435	coroapi.ver = CORO_API_VERSION;
1133	coroapi.transfer = api_transfer;	1436	coroapi.transfer = api_transfer;
1134		1437
1135	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1438	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1142	struct coro *coro;	1445	struct coro *coro;
1143	HV *hv;	1446	HV *hv;
1144	int i;	1447	int i;
1145		1448
1146	Newz (0, coro, 1, struct coro);	1449	Newz (0, coro, 1, struct coro);
1147	coro->args = newAV ();	1450	coro->args = newAV ();
1148	coro->save = CORO_SAVE_ALL;
1149	coro->flags = CF_NEW;	1451	coro->flags = CF_NEW;
1150		1452
		1453	if (coro_first) coro_first->prev = coro;
		1454	coro->next = coro_first;
		1455	coro_first = coro;
		1456
1151	hv = newHV ();	1457	coro->hv = hv = newHV ();
1152	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1458	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1153	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1459	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1154		1460
		1461	av_extend (coro->args, items - 1);
1155	for (i = 1; i < items; i++)	1462	for (i = 1; i < items; i++)
1156	av_push (coro->args, newSVsv (ST (i)));	1463	av_push (coro->args, newSVsv (ST (i)));
1157	}	1464	}
1158	OUTPUT:	1465	OUTPUT:
1159	RETVAL	1466	RETVAL
1160		1467
1161	int	1468	# these not obviously related functions are all rolled into the same xs
1162	save (SV *coro, int new_save = -1)	1469	# function to increase chances that they all will call transfer with the same
1163	CODE:	1470	# stack offset
1164	RETVAL = api_save (coro, new_save);
1165	OUTPUT:
1166	RETVAL
1167
1168	void	1471	void
1169	_set_stacklevel (...)	1472	_set_stacklevel (...)
1170	ALIAS:	1473	ALIAS:
1171	Coro::State::transfer = 1	1474	Coro::State::transfer = 1
1172	Coro::schedule = 2	1475	Coro::schedule = 2
…		…
1185		1488
1186	case 1:	1489	case 1:
1187	if (items != 2)	1490	if (items != 2)
1188	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1491	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1189		1492
1190	prepare_transfer (&ta, ST (0), ST (1));	1493	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1191	break;	1494	break;
1192		1495
1193	case 2:	1496	case 2:
1194	prepare_schedule (&ta);	1497	prepare_schedule (aTHX_ &ta);
1195	break;	1498	break;
1196		1499
1197	case 3:	1500	case 3:
1198	prepare_cede (&ta);	1501	prepare_cede (aTHX_ &ta);
1199	break;	1502	break;
1200		1503
1201	case 4:	1504	case 4:
1202	if (!prepare_cede_notself (&ta))	1505	if (!prepare_cede_notself (aTHX_ &ta))
1203	XSRETURN_EMPTY;	1506	XSRETURN_EMPTY;
1204		1507
1205	break;	1508	break;
1206	}	1509	}
1207		1510
1208	BARRIER;	1511	BARRIER;
1209	TRANSFER (ta);	1512	TRANSFER (ta);
1210		1513
1211	if (GIMME_V != G_VOID && ta.next != ta.prev)	1514	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1212	XSRETURN_YES;	1515	XSRETURN_YES;
1213	}	1516	}
1214		1517
1215	bool	1518	bool
1216	_destroy (SV *coro_sv)	1519	_destroy (SV *coro_sv)
1217	CODE:	1520	CODE:
1218	RETVAL = coro_state_destroy (SvSTATE (coro_sv));	1521	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1219	OUTPUT:	1522	OUTPUT:
1220	RETVAL	1523	RETVAL
1221		1524
1222	void	1525	void
1223	_exit (code)	1526	_exit (code)
…		…
1225	PROTOTYPE: $	1528	PROTOTYPE: $
1226	CODE:	1529	CODE:
1227	_exit (code);	1530	_exit (code);
1228		1531
1229	int	1532	int
		1533	cctx_stacksize (int new_stacksize = 0)
		1534	CODE:
		1535	RETVAL = coro_stacksize;
		1536	if (new_stacksize)
		1537	coro_stacksize = new_stacksize;
		1538	OUTPUT:
		1539	RETVAL
		1540
		1541	int
1230	cctx_count ()	1542	cctx_count ()
1231	CODE:	1543	CODE:
1232	RETVAL = cctx_count;	1544	RETVAL = cctx_count;
1233	OUTPUT:	1545	OUTPUT:
1234	RETVAL	1546	RETVAL
…		…
1238	CODE:	1550	CODE:
1239	RETVAL = cctx_idle;	1551	RETVAL = cctx_idle;
1240	OUTPUT:	1552	OUTPUT:
1241	RETVAL	1553	RETVAL
1242		1554
		1555	void
		1556	list ()
		1557	PPCODE:
		1558	{
		1559	struct coro *coro;
		1560	for (coro = coro_first; coro; coro = coro->next)
		1561	if (coro->hv)
		1562	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1563	}
		1564
		1565	void
		1566	call (Coro::State coro, SV *coderef)
		1567	ALIAS:
		1568	eval = 1
		1569	CODE:
		1570	{
		1571	if (coro->mainstack)
		1572	{
		1573	struct coro temp;
		1574	Zero (&temp, 1, struct coro);
		1575
		1576	if (!(coro->flags & CF_RUNNING))
		1577	{
		1578	save_perl (aTHX_ &temp);
		1579	load_perl (aTHX_ coro);
		1580	}
		1581
		1582	{
		1583	dSP;
		1584	ENTER;
		1585	SAVETMPS;
		1586	PUSHMARK (SP);
		1587	PUTBACK;
		1588	if (ix)
		1589	eval_sv (coderef, 0);
		1590	else
		1591	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1592	SPAGAIN;
		1593	FREETMPS;
		1594	LEAVE;
		1595	PUTBACK;
		1596	}
		1597
		1598	if (!(coro->flags & CF_RUNNING))
		1599	{
		1600	save_perl (aTHX_ coro);
		1601	load_perl (aTHX_ &temp);
		1602	}
		1603	}
		1604	}
		1605
		1606	SV *
		1607	is_ready (Coro::State coro)
		1608	PROTOTYPE: $
		1609	ALIAS:
		1610	is_ready = CF_READY
		1611	is_running = CF_RUNNING
		1612	is_new = CF_NEW
		1613	is_destroyed = CF_DESTROYED
		1614	CODE:
		1615	RETVAL = boolSV (coro->flags & ix);
		1616	OUTPUT:
		1617	RETVAL
		1618
		1619	void
		1620	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1621
		1622	SV *
		1623	has_stack (Coro::State coro)
		1624	PROTOTYPE: $
		1625	CODE:
		1626	RETVAL = boolSV (!!coro->cctx);
		1627	OUTPUT:
		1628	RETVAL
		1629
		1630	int
		1631	is_traced (Coro::State coro)
		1632	PROTOTYPE: $
		1633	CODE:
		1634	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1635	OUTPUT:
		1636	RETVAL
		1637
		1638	IV
		1639	rss (Coro::State coro)
		1640	PROTOTYPE: $
		1641	ALIAS:
		1642	usecount = 1
		1643	CODE:
		1644	switch (ix)
		1645	{
		1646	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1647	case 1: RETVAL = coro->usecount; break;
		1648	}
		1649	OUTPUT:
		1650	RETVAL
		1651
		1652
1243	MODULE = Coro::State PACKAGE = Coro	1653	MODULE = Coro::State PACKAGE = Coro
1244		1654
1245	BOOT:	1655	BOOT:
1246	{	1656	{
1247	int i;	1657	int i;
		1658
		1659	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1660	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1661	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1662
		1663	coro_current = get_sv ("Coro::current", FALSE);
		1664	SvREADONLY_on (coro_current);
1248		1665
1249	coro_stash = gv_stashpv ("Coro", TRUE);	1666	coro_stash = gv_stashpv ("Coro", TRUE);
1250		1667
1251	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1668	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1252	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1669	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1253	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1670	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1254	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1671	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1255	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1672	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1256	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1673	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1257		1674
1258	coro_current = get_sv ("Coro::current", FALSE);
1259	SvREADONLY_on (coro_current);
1260
1261	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1675	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1262	coro_ready[i] = newAV ();	1676	coro_ready[i] = newAV ();
1263		1677
1264	{	1678	{
1265	SV *sv = perl_get_sv("Coro::API", 1);	1679	SV *sv = perl_get_sv("Coro::API", 1);
1266		1680
1267	coroapi.schedule = api_schedule;	1681	coroapi.schedule = api_schedule;
1268	coroapi.save = api_save;
1269	coroapi.cede = api_cede;	1682	coroapi.cede = api_cede;
1270	coroapi.cede_notself = api_cede_notself;	1683	coroapi.cede_notself = api_cede_notself;
1271	coroapi.ready = api_ready;	1684	coroapi.ready = api_ready;
1272	coroapi.is_ready = api_is_ready;	1685	coroapi.is_ready = api_is_ready;
1273	coroapi.nready = &coro_nready;	1686	coroapi.nready = &coro_nready;
…		…
1314	CODE:	1727	CODE:
1315	RETVAL = boolSV (api_ready (self));	1728	RETVAL = boolSV (api_ready (self));
1316	OUTPUT:	1729	OUTPUT:
1317	RETVAL	1730	RETVAL
1318		1731
1319	SV *
1320	is_ready (SV *self)
1321	PROTOTYPE: $
1322	CODE:
1323	RETVAL = boolSV (api_is_ready (self));
1324	OUTPUT:
1325	RETVAL
1326
1327	int	1732	int
1328	nready (...)	1733	nready (...)
1329	PROTOTYPE:	1734	PROTOTYPE:
1330	CODE:	1735	CODE:
1331	RETVAL = coro_nready;	1736	RETVAL = coro_nready;
1332	OUTPUT:	1737	OUTPUT:
1333	RETVAL	1738	RETVAL
1334		1739
		1740	void
		1741	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1742	PROTOTYPE: $;$
		1743	CODE:
		1744	SvREFCNT_dec (self->throw);
		1745	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1746
		1747	# for async_pool speedup
		1748	void
		1749	_pool_1 (SV *cb)
		1750	CODE:
		1751	{
		1752	struct coro *coro = SvSTATE (coro_current);
		1753	HV *hv = (HV *)SvRV (coro_current);
		1754	AV *defav = GvAV (PL_defgv);
		1755	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1756	AV *invoke_av;
		1757	int i, len;
		1758
		1759	if (!invoke)
		1760	croak ("\3terminate\2\n");
		1761
		1762	SvREFCNT_dec (coro->saved_deffh);
		1763	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1764
		1765	hv_store (hv, "desc", sizeof ("desc") - 1,
		1766	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1767
		1768	invoke_av = (AV *)SvRV (invoke);
		1769	len = av_len (invoke_av);
		1770
		1771	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1772
		1773	if (len > 0)
		1774	{
		1775	av_fill (defav, len - 1);
		1776	for (i = 0; i < len; ++i)
		1777	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1778	}
		1779
		1780	SvREFCNT_dec (invoke);
		1781	}
		1782
		1783	void
		1784	_pool_2 (SV *cb)
		1785	CODE:
		1786	{
		1787	struct coro *coro = SvSTATE (coro_current);
		1788
		1789	sv_setsv (cb, &PL_sv_undef);
		1790
		1791	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1792	coro->saved_deffh = 0;
		1793
		1794	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1795	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1796	croak ("\3terminate\2\n");
		1797
		1798	av_clear (GvAV (PL_defgv));
		1799	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1800	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1801
		1802	coro->prio = 0;
		1803
		1804	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1805	api_trace (coro_current, 0);
		1806
		1807	av_push (av_async_pool, newSVsv (coro_current));
		1808	}
		1809
		1810
1335	MODULE = Coro::State PACKAGE = Coro::AIO	1811	MODULE = Coro::State PACKAGE = Coro::AIO
1336		1812
1337	SV *	1813	SV *
1338	_get_state ()	1814	_get_state ()
1339	CODE:	1815	CODE:

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