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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.142 by root, Tue Feb 13 19:21:29 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>
38	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))	40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
39	#else	41	#else
40	# define REGISTER_STACK(cctx,start,end)	42	# define REGISTER_STACK(cctx,start,end)
41	#endif	43	#endif
…		…
73	/* 5.8.7 */	75	/* 5.8.7 */
74	#ifndef SvRV_set	76	#ifndef SvRV_set
75	# define SvRV_set(s,v) SvRV(s) = (v)	77	# define SvRV_set(s,v) SvRV(s) = (v)
76	#endif	78	#endif
77		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
78	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	88	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
79	# undef STACKGUARD	89	# undef CORO_STACKGUARD
80	#endif	90	#endif
81		91
82	#ifndef STACKGUARD	92	#ifndef CORO_STACKGUARD
83	# define STACKGUARD 0	93	# define CORO_STACKGUARD 0
84	#endif	94	#endif
85		95
86	/* prefer perl internal functions over our own? */	96	/* prefer perl internal functions over our own? */
87	#ifndef PREFER_PERL_FUNCTIONS	97	#ifndef CORO_PREFER_PERL_FUNCTIONS
88	# define PREFER_PERL_FUNCTIONS 0	98	# define CORO_PREFER_PERL_FUNCTIONS 0
89	#endif	99	#endif
90		100
91	/* 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
92	* to the current C stack pointer. Its property is that it changes with each call	102	* portable way as possible. */
93	* and should be unique. */
94	#define dSTACKLEVEL int stacklevel	103	#define dSTACKLEVEL volatile char stacklevel
95	#define STACKLEVEL ((void *)&stacklevel)	104	#define STACKLEVEL ((void *)&stacklevel)
96		105
97	#define IN_DESTRUCT (PL_main_cv == Nullcv)	106	#define IN_DESTRUCT (PL_main_cv == Nullcv)
98		107
99	#if __GNUC__ >= 3	108	#if __GNUC__ >= 3
100	# define attribute(x) __attribute__(x)	109	# define attribute(x) __attribute__(x)
101	# define BARRIER __asm__ __volatile__ ("" : : : "memory")	110	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		111	# define expect(expr,value) __builtin_expect ((expr),(value))
102	#else	112	#else
103	# define attribute(x)	113	# define attribute(x)
104	# define BARRIER	114	# define BARRIER
		115	# define expect(expr,value) (expr)
105	#endif	116	#endif
		117
		118	#define expect_false(expr) expect ((expr) != 0, 0)
		119	#define expect_true(expr) expect ((expr) != 0, 1)
106		120
107	#define NOINLINE attribute ((noinline))	121	#define NOINLINE attribute ((noinline))
108		122
109	#include "CoroAPI.h"	123	#include "CoroAPI.h"
110		124
…		…
124	I32 laststype;	138	I32 laststype;
125	int laststatval;	139	int laststatval;
126	Stat_t statcache;	140	Stat_t statcache;
127	};	141	};
128		142
		143	static size_t coro_stacksize = CORO_STACKSIZE;
129	static struct CoroAPI coroapi;	144	static struct CoroAPI coroapi;
130	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;
131	static HV *coro_state_stash, *coro_stash;	147	static HV *coro_state_stash, *coro_stash;
132	static SV *coro_mortal; /* will be freed after next transfer */	148	static SV *coro_mortal; /* will be freed after next transfer */
133		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
134	static struct coro_cctx *cctx_first;	158	static struct coro_cctx *cctx_first;
135	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	};
136		169
137	/* this is a structure representing a c-level coroutine */	170	/* this is a structure representing a c-level coroutine */
138	typedef struct coro_cctx {	171	typedef struct coro_cctx {
139	struct coro_cctx *next;	172	struct coro_cctx *next;
140		173
141	/* the stack */	174	/* the stack */
142	void *sptr;	175	void *sptr;
143	ssize_t ssize; /* positive == mmap, otherwise malloc */	176	size_t ssize;
144		177
145	/* cpu state */	178	/* cpu state */
146	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	179	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
147	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */	180	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
148	JMPENV *top_env;	181	JMPENV *top_env;
149	coro_context cctx;	182	coro_context cctx;
150		183
151	int inuse;
152
153	#if USE_VALGRIND	184	#if CORO_USE_VALGRIND
154	int valgrind_id;	185	int valgrind_id;
155	#endif	186	#endif
		187	unsigned char flags;
156	} coro_cctx;	188	} coro_cctx;
157		189
158	enum {	190	enum {
159	CF_RUNNING = 0x0001, /* coroutine is running */	191	CF_RUNNING = 0x0001, /* coroutine is running */
160	CF_READY = 0x0002, /* coroutine is ready */	192	CF_READY = 0x0002, /* coroutine is ready */
…		…
168	coro_cctx *cctx;	200	coro_cctx *cctx;
169		201
170	/* data associated with this coroutine (initial args) */	202	/* data associated with this coroutine (initial args) */
171	AV *args;	203	AV *args;
172	int refcnt;	204	int refcnt;
173	int save; /* CORO_SAVE flags */
174	int flags; /* CF_ flags */	205	int flags; /* CF_ flags */
175		206
176	/* optionally saved, might be zero */	207	/* optionally saved, might be zero */
177	AV *defav; /* @_ */	208	AV *defav; /* @_ */
178	SV *defsv; /* $_ */	209	SV *defsv; /* $_ */
179	SV *errsv; /* $@ */	210	SV *errsv; /* $@ */
		211	SV *deffh; /* default filehandle */
180	SV *irssv; /* $/ */	212	SV *irssv; /* $/ */
181	SV *irssv_sv; /* real $/ cache */	213	SV *irssv_sv; /* real $/ cache */
182		214
183	#define VAR(name,type) type name;	215	#define VAR(name,type) type name;
184	# include "state.h"	216	# include "state.h"
185	#undef VAR	217	#undef VAR
186		218
		219	/* statistics */
		220	int usecount; /* number of transfers to this coro */
		221
187	/* coro process data */	222	/* coro process data */
188	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 */
189	};	232	};
190		233
191	typedef struct coro *Coro__State;	234	typedef struct coro *Coro__State;
192	typedef struct coro *Coro__State_or_hashref;	235	typedef struct coro *Coro__State_or_hashref;
193		236
…		…
202		245
203	/* for Coro.pm */	246	/* for Coro.pm */
204	static SV *coro_current;	247	static SV *coro_current;
205	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	248	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
206	static int coro_nready;	249	static int coro_nready;
		250	static struct coro *coro_first;
207		251
208	/** lowlevel stuff **********************************************************/	252	/** lowlevel stuff **********************************************************/
209		253
210	static AV *	254	static AV *
211	coro_clone_padlist (CV *cv)	255	coro_clone_padlist (pTHX_ CV *cv)
212	{	256	{
213	AV *padlist = CvPADLIST (cv);	257	AV *padlist = CvPADLIST (cv);
214	AV *newpadlist, *newpad;	258	AV *newpadlist, *newpad;
215		259
216	newpadlist = newAV ();	260	newpadlist = newAV ();
…		…
228		272
229	return newpadlist;	273	return newpadlist;
230	}	274	}
231		275
232	static void	276	static void
233	free_padlist (AV *padlist)	277	free_padlist (pTHX_ AV *padlist)
234	{	278	{
235	/* may be during global destruction */	279	/* may be during global destruction */
236	if (SvREFCNT (padlist))	280	if (SvREFCNT (padlist))
237	{	281	{
238	I32 i = AvFILLp (padlist);	282	I32 i = AvFILLp (padlist);
…		…
259	AV *padlist;	303	AV *padlist;
260	AV *av = (AV *)mg->mg_obj;	304	AV *av = (AV *)mg->mg_obj;
261		305
262	/* casting is fun. */	306	/* casting is fun. */
263	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	307	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264	free_padlist (padlist);	308	free_padlist (aTHX_ padlist);
265		309
266	SvREFCNT_dec (av);	310	SvREFCNT_dec (av);
267		311
268	return 0;	312	return 0;
269	}	313	}
…		…
277	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	321	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
278	? SvMAGIC (cv) \	322	? SvMAGIC (cv) \
279	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	323	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
280	: 0	324	: 0
281		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
282	/* the next two functions merely cache the padlists */	352	/* the next two functions merely cache the padlists */
283	static void	353	static void
284	get_padlist (CV *cv)	354	get_padlist (pTHX_ CV *cv)
285	{	355	{
286	MAGIC *mg = CORO_MAGIC (cv);	356	MAGIC *mg = CORO_MAGIC (cv);
287	AV *av;	357	AV *av;
288		358
289	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	359	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
290	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	360	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
291	else	361	else
292	{	362	{
293	#if PREFER_PERL_FUNCTIONS	363	#if CORO_PREFER_PERL_FUNCTIONS
294	/* this is probably cleaner, but also slower? */	364	/* this is probably cleaner, but also slower? */
295	CV *cp = Perl_cv_clone (cv);	365	CV *cp = Perl_cv_clone (cv);
296	CvPADLIST (cv) = CvPADLIST (cp);	366	CvPADLIST (cv) = CvPADLIST (cp);
297	CvPADLIST (cp) = 0;	367	CvPADLIST (cp) = 0;
298	SvREFCNT_dec (cp);	368	SvREFCNT_dec (cp);
299	#else	369	#else
300	CvPADLIST (cv) = coro_clone_padlist (cv);	370	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
301	#endif	371	#endif
302	}	372	}
303	}	373	}
304		374
305	static void	375	static void
306	put_padlist (CV *cv)	376	put_padlist (pTHX_ CV *cv)
307	{	377	{
308	MAGIC *mg = CORO_MAGIC (cv);	378	MAGIC *mg = CORO_MAGIC (cv);
309	AV *av;	379	AV *av;
310		380
311	if (!mg)	381	if (expect_false (!mg))
312	{	382	{
313	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	383	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
314	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	384	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
315	mg->mg_virtual = &vtbl_coro;	385	mg->mg_virtual = &vtbl_coro;
316	mg->mg_obj = (SV *)newAV ();	386	mg->mg_obj = (SV *)newAV ();
317	}	387	}
318		388
319	av = (AV *)mg->mg_obj;	389	av = (AV *)mg->mg_obj;
320		390
321	if (AvFILLp (av) >= AvMAX (av))	391	if (expect_false (AvFILLp (av) >= AvMAX (av)))
322	av_extend (av, AvMAX (av) + 1);	392	av_extend (av, AvMAX (av) + 1);
323		393
324	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	394	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
325	}	395	}
326		396
327	/** load & save, init *******************************************************/	397	/** load & save, init *******************************************************/
328		398
329	#define SB do {
330	#define SE } while (0)
331
332	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
333
334	static void	399	static void
335	load_perl (Coro__State c)	400	load_perl (pTHX_ Coro__State c)
336	{	401	{
337	#define VAR(name,type) PL_ ## name = c->name;	402	#define VAR(name,type) PL_ ## name = c->name;
338	# include "state.h"	403	# include "state.h"
339	#undef VAR	404	#undef VAR
340		405
341	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	406	GvSV (PL_defgv) = c->defsv;
342	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	407	GvAV (PL_defgv) = c->defav;
343	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	408	GvSV (PL_errgv) = c->errsv;
344	if (c->irssv)	409	GvSV (irsgv) = c->irssv_sv;
345	{
346	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
347	SvREFCNT_dec (c->irssv);
348	else
349	{
350	REPLACE_SV (PL_rs, c->irssv);
351	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
352	sv_setsv (c->irssv_sv, PL_rs);
353	}
354	}
355		410
356	{	411	{
357	dSP;	412	dSP;
358	CV *cv;	413	CV *cv;
359		414
360	/* now do the ugly restore mess */	415	/* now do the ugly restore mess */
361	while ((cv = (CV *)POPs))	416	while (expect_true (cv = (CV *)POPs))
362	{	417	{
363	put_padlist (cv); /* mark this padlist as available */	418	put_padlist (aTHX_ cv); /* mark this padlist as available */
364	CvDEPTH (cv) = PTR2IV (POPs);	419	CvDEPTH (cv) = PTR2IV (POPs);
365	CvPADLIST (cv) = (AV *)POPs;	420	CvPADLIST (cv) = (AV *)POPs;
366	}	421	}
367		422
368	PUTBACK;	423	PUTBACK;
369	}	424	}
370	assert (!PL_comppad || AvARRAY (PL_comppad));//D
371	}	425	}
372		426
373	static void	427	static void
374	save_perl (Coro__State c)	428	save_perl (pTHX_ Coro__State c)
375	{	429	{
376	assert (!PL_comppad || AvARRAY (PL_comppad));//D
377	{	430	{
378	dSP;	431	dSP;
379	I32 cxix = cxstack_ix;	432	I32 cxix = cxstack_ix;
380	PERL_CONTEXT *ccstk = cxstack;	433	PERL_CONTEXT *ccstk = cxstack;
381	PERL_SI *top_si = PL_curstackinfo;	434	PERL_SI *top_si = PL_curstackinfo;
…		…
383	/*	436	/*
384	* 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
385	* (and reinitialize) all cv's in the whole callchain :(	438	* (and reinitialize) all cv's in the whole callchain :(
386	*/	439	*/
387		440
388	EXTEND (SP, 3 + 1);
389	PUSHs (Nullsv);	441	XPUSHs (Nullsv);
390	/* this loop was inspired by pp_caller */	442	/* this loop was inspired by pp_caller */
391	for (;;)	443	for (;;)
392	{	444	{
393	while (cxix >= 0)	445	while (expect_true (cxix >= 0))
394	{	446	{
395	PERL_CONTEXT *cx = &ccstk[cxix--];	447	PERL_CONTEXT *cx = &ccstk[cxix--];
396		448
397	if (CxTYPE (cx) == CXt_SUB)	449	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
398	{	450	{
399	CV *cv = cx->blk_sub.cv;	451	CV *cv = cx->blk_sub.cv;
400		452
401	if (CvDEPTH (cv))	453	if (expect_true (CvDEPTH (cv)))
402	{	454	{
403	EXTEND (SP, 3);	455	EXTEND (SP, 3);
404	PUSHs ((SV *)CvPADLIST (cv));	456	PUSHs ((SV *)CvPADLIST (cv));
405	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	457	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
406	PUSHs ((SV *)cv);	458	PUSHs ((SV *)cv);
407		459
408	CvDEPTH (cv) = 0;	460	CvDEPTH (cv) = 0;
409	get_padlist (cv);	461	get_padlist (aTHX_ cv);
410	}	462	}
411	}	463	}
412	}	464	}
413		465
414	if (top_si->si_type == PERLSI_MAIN)	466	if (expect_true (top_si->si_type == PERLSI_MAIN))
415	break;	467	break;
416		468
417	top_si = top_si->si_prev;	469	top_si = top_si->si_prev;
418	ccstk = top_si->si_cxstack;	470	ccstk = top_si->si_cxstack;
419	cxix = top_si->si_cxix;	471	cxix = top_si->si_cxix;
420	}	472	}
421		473
422	PUTBACK;	474	PUTBACK;
423	}	475	}
424		476
425	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	477	c->defav = GvAV (PL_defgv);
426	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	478	c->defsv = DEFSV;
427	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	479	c->errsv = ERRSV;
428	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	480	c->irssv_sv = GvSV (irsgv);
429		481
430	#define VAR(name,type)c->name = PL_ ## name;	482	#define VAR(name,type)c->name = PL_ ## name;
431	# include "state.h"	483	# include "state.h"
432	#undef VAR	484	#undef VAR
433	}	485	}
…		…
436	* allocate various perl stacks. This is an exact copy	488	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	489	* of perl.c:init_stacks, except that it uses less memory
438	* on the (sometimes correct) assumption that coroutines do	490	* on the (sometimes correct) assumption that coroutines do
439	* not usually need a lot of stackspace.	491	* not usually need a lot of stackspace.
440	*/	492	*/
441	#if PREFER_PERL_FUNCTIONS	493	#if CORO_PREFER_PERL_FUNCTIONS
442	# define coro_init_stacks init_stacks	494	# define coro_init_stacks init_stacks
443	#else	495	#else
444	static void	496	static void
445	coro_init_stacks ()	497	coro_init_stacks (pTHX)
446	{	498	{
447	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	499	PL_curstackinfo = new_stackinfo(64, 6);
448	PL_curstackinfo->si_type = PERLSI_MAIN;	500	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	501	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	502	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		503
452	PL_stack_base = AvARRAY(PL_curstack);	504	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	505	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	506	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		507
456	New(50,PL_tmps_stack,128,SV*);	508	New(50,PL_tmps_stack,64,SV*);
457	PL_tmps_floor = -1;	509	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	510	PL_tmps_ix = -1;
459	PL_tmps_max = 128;	511	PL_tmps_max = 64;
460		512
461	New(54,PL_markstack,32,I32);	513	New(54,PL_markstack,16,I32);
462	PL_markstack_ptr = PL_markstack;	514	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 32;	515	PL_markstack_max = PL_markstack + 16;
464		516
465	#ifdef SET_MARK_OFFSET	517	#ifdef SET_MARK_OFFSET
466	SET_MARK_OFFSET;	518	SET_MARK_OFFSET;
467	#endif	519	#endif
468		520
469	New(54,PL_scopestack,32,I32);	521	New(54,PL_scopestack,16,I32);
470	PL_scopestack_ix = 0;	522	PL_scopestack_ix = 0;
471	PL_scopestack_max = 32;	523	PL_scopestack_max = 16;
472		524
473	New(54,PL_savestack,64,ANY);	525	New(54,PL_savestack,64,ANY);
474	PL_savestack_ix = 0;	526	PL_savestack_ix = 0;
475	PL_savestack_max = 64;	527	PL_savestack_max = 64;
476		528
477	#if !PERL_VERSION_ATLEAST (5,9,0)	529	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,16,OP*);	530	New(54,PL_retstack,4,OP*);
479	PL_retstack_ix = 0;	531	PL_retstack_ix = 0;
480	PL_retstack_max = 16;	532	PL_retstack_max = 4;
481	#endif	533	#endif
482	}	534	}
483	#endif	535	#endif
484		536
485	/*	537	/*
486	* destroy the stacks, the callchain etc...	538	* destroy the stacks, the callchain etc...
487	*/	539	*/
488	static void	540	static void
489	coro_destroy_stacks ()	541	coro_destroy_stacks (pTHX)
490	{	542	{
491	if (!IN_DESTRUCT)
492	{
493	/* restore all saved variables and stuff */
494	LEAVE_SCOPE (0);
495	assert (PL_tmps_floor == -1);
496
497	/* free all temporaries */
498	FREETMPS;
499	assert (PL_tmps_ix == -1);
500
501	/* unwind all extra stacks */
502	POPSTACK_TO (PL_mainstack);
503
504	/* unwind main stack */
505	dounwind (-1);
506	}
507
508	while (PL_curstackinfo->si_next)	543	while (PL_curstackinfo->si_next)
509	PL_curstackinfo = PL_curstackinfo->si_next;	544	PL_curstackinfo = PL_curstackinfo->si_next;
510		545
511	while (PL_curstackinfo)	546	while (PL_curstackinfo)
512	{	547	{
…		…
527	#if !PERL_VERSION_ATLEAST (5,9,0)	562	#if !PERL_VERSION_ATLEAST (5,9,0)
528	Safefree (PL_retstack);	563	Safefree (PL_retstack);
529	#endif	564	#endif
530	}	565	}
531		566
		567	static size_t
		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
532	/** coroutine stack handling ************************************************/	598	/** coroutine stack handling ************************************************/
533		599
534	static void	600	static void
535	setup_coro (struct coro *coro)	601	coro_setup (pTHX_ struct coro *coro)
536	{	602	{
537	/*	603	/*
538	* emulate part of the perl startup here.	604	* emulate part of the perl startup here.
539	*/	605	*/
540
541	coro_init_stacks ();	606	coro_init_stacks (aTHX);
542		607
		608	PL_runops = RUNOPS_DEFAULT;
543	PL_curcop = &PL_compiling;	609	PL_curcop = &PL_compiling;
544	PL_in_eval = EVAL_NULL;	610	PL_in_eval = EVAL_NULL;
545	PL_comppad = 0;	611	PL_comppad = 0;
546	PL_curpm = 0;	612	PL_curpm = 0;
		613	PL_curpad = 0;
547	PL_localizing = 0;	614	PL_localizing = 0;
548	PL_dirty = 0;	615	PL_dirty = 0;
549	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);
550		624
551	{	625	{
552	dSP;	626	dSP;
553	LOGOP myop;	627	LOGOP myop;
554		628
555	SvREFCNT_dec (GvAV (PL_defgv));
556	GvAV (PL_defgv) = coro->args; coro->args = 0;
557
558	Zero (&myop, 1, LOGOP);	629	Zero (&myop, 1, LOGOP);
559	myop.op_next = Nullop;	630	myop.op_next = Nullop;
560	myop.op_flags = OPf_WANT_VOID;	631	myop.op_flags = OPf_WANT_VOID;
561		632
562	PUSHMARK (SP);	633	PUSHMARK (SP);
563	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	634	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
564	PUTBACK;	635	PUTBACK;
565	PL_op = (OP *)&myop;	636	PL_op = (OP *)&myop;
566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	637	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
567	SPAGAIN;	638	SPAGAIN;
568	}	639	}
569		640
570	ENTER; /* necessary e.g. for dounwind */	641	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
571	}	642	}
572		643
573	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
574	free_coro_mortal ()	678	free_coro_mortal (pTHX)
575	{	679	{
576	if (coro_mortal)	680	if (expect_true (coro_mortal))
577	{	681	{
578	SvREFCNT_dec (coro_mortal);	682	SvREFCNT_dec (coro_mortal);
579	coro_mortal = 0;	683	coro_mortal = 0;
580	}	684	}
581	}	685	}
582		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
583	/* 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 */
584	static void NOINLINE	814	static void NOINLINE
585	prepare_cctx (coro_cctx *cctx)	815	prepare_cctx (pTHX_ coro_cctx *cctx)
586	{	816	{
587	dSP;	817	dSP;
588	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;
589		824
590	Zero (&myop, 1, LOGOP);	825	Zero (&myop, 1, LOGOP);
591	myop.op_next = PL_op;	826	myop.op_next = PL_op;
592	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;	827	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
593		828
…		…
599	PL_op = (OP *)&myop;	834	PL_op = (OP *)&myop;
600	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	835	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
601	SPAGAIN;	836	SPAGAIN;
602	}	837	}
603		838
		839	/*
		840	* this is a _very_ stripped down perl interpreter ;)
		841	*/
604	static void	842	static void
605	coro_run (void *arg)	843	coro_run (void *arg)
606	{	844	{
		845	dTHX;
		846
607	/* coro_run is the alternative tail of transfer(), so unlock here. */	847	/* coro_run is the alternative tail of transfer(), so unlock here. */
608	UNLOCK;	848	UNLOCK;
609		849
610	/*	850	/* we now skip the entersub that lead to transfer() */
611	* this is a _very_ stripped down perl interpreter ;)	851	PL_op = PL_op->op_next;
612	*/
613	PL_top_env = &PL_start_env;
614		852
615	/* inject call to cctx_init */	853	/* inject a fake subroutine call to cctx_init */
616	prepare_cctx ((coro_cctx *)arg);	854	prepare_cctx (aTHX_ (coro_cctx *)arg);
617		855
618	/* 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 */
619	PL_restartop = PL_op;	857	PL_restartop = PL_op;
620	perl_run (PL_curinterp);	858	perl_run (PL_curinterp);
621		859
622	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	860	/*
623	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 */
624	}	869	}
625		870
626	static coro_cctx *	871	static coro_cctx *
627	cctx_new ()	872	cctx_new ()
628	{	873	{
629	coro_cctx *cctx;	874	coro_cctx *cctx;
		875	void *stack_start;
		876	size_t stack_size;
630		877
631	++cctx_count;	878	++cctx_count;
632		879
633	Newz (0, cctx, 1, coro_cctx);	880	Newz (0, cctx, 1, coro_cctx);
634		881
635	#if HAVE_MMAP	882	#if HAVE_MMAP
636		883
637	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	884	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
638	/* mmap supposedly does allocate-on-write for us */	885	/* mmap supposedly does allocate-on-write for us */
639	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	886	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
640		887
641	if (cctx->sptr != (void *)-1)	888	if (cctx->sptr != (void *)-1)
642	{	889	{
643	# if STACKGUARD	890	# if CORO_STACKGUARD
644	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	891	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
645	# endif	892	# endif
646	REGISTER_STACK (
647	cctx,
648	STACKGUARD * PAGESIZE + (char *)cctx->sptr,	893	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
649	cctx->ssize + (char *)cctx->sptr	894	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
650	);	895	cctx->flags |= CC_MAPPED;
651
652	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
653	}	896	}
654	else	897	else
655	#endif	898	#endif
656	{	899	{
657	cctx->ssize = -STACKSIZE * (long)sizeof (long);	900	cctx->ssize = coro_stacksize * (long)sizeof (long);
658	New (0, cctx->sptr, STACKSIZE, long);	901	New (0, cctx->sptr, coro_stacksize, long);
659		902
660	if (!cctx->sptr)	903	if (!cctx->sptr)
661	{	904	{
662	perror ("FATAL: unable to allocate stack for coroutine");	905	perror ("FATAL: unable to allocate stack for coroutine");
663	_exit (EXIT_FAILURE);	906	_exit (EXIT_FAILURE);
664	}	907	}
665		908
666	REGISTER_STACK (	909	stack_start = cctx->sptr;
667	cctx,	910	stack_size = cctx->ssize;
668	(char *)cctx->sptr,	911	}
669	(char *)cctx->sptr - cctx->ssize
670	);
671		912
		913	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
672	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);
673	}
674		915
675	return cctx;	916	return cctx;
676	}	917	}
677		918
678	static void	919	static void
…		…
681	if (!cctx)	922	if (!cctx)
682	return;	923	return;
683		924
684	--cctx_count;	925	--cctx_count;
685		926
686	#if USE_VALGRIND	927	#if CORO_USE_VALGRIND
687	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	928	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
688	#endif	929	#endif
689		930
690	#if HAVE_MMAP	931	#if HAVE_MMAP
691	if (cctx->ssize > 0)	932	if (cctx->flags & CC_MAPPED)
692	munmap (cctx->sptr, cctx->ssize);	933	munmap (cctx->sptr, cctx->ssize);
693	else	934	else
694	#endif	935	#endif
695	Safefree (cctx->sptr);	936	Safefree (cctx->sptr);
696		937
697	Safefree (cctx);	938	Safefree (cctx);
698	}	939	}
699		940
		941	/* wether this cctx should be destructed */
		942	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		943
700	static coro_cctx *	944	static coro_cctx *
701	cctx_get ()	945	cctx_get (pTHX)
702	{	946	{
703	coro_cctx *cctx;	947	while (expect_true (cctx_first))
704
705	if (cctx_first)
706	{	948	{
707	cctx = cctx_first;	949	coro_cctx *cctx = cctx_first;
708	cctx_first = cctx->next;	950	cctx_first = cctx->next;
709	--cctx_idle;	951	--cctx_idle;
710	}	952
711	else	953	if (expect_true (!CCTX_EXPIRED (cctx)))
712	{	954	return cctx;
713	cctx = cctx_new ();	955
714	PL_op = PL_op->op_next;	956	cctx_destroy (cctx);
715	}	957	}
716		958
717	return cctx;	959	return cctx_new ();
718	}	960	}
719		961
720	static void	962	static void
721	cctx_put (coro_cctx *cctx)	963	cctx_put (coro_cctx *cctx)
722	{	964	{
723	/* free another cctx if overlimit */	965	/* free another cctx if overlimit */
724	if (cctx_idle >= MAX_IDLE_CCTX)	966	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
725	{	967	{
726	coro_cctx *first = cctx_first;	968	coro_cctx *first = cctx_first;
727	cctx_first = first->next;	969	cctx_first = first->next;
728	--cctx_idle;	970	--cctx_idle;
729		971
730	assert (!first->inuse);
731	cctx_destroy (first);	972	cctx_destroy (first);
732	}	973	}
733		974
734	++cctx_idle;	975	++cctx_idle;
735	cctx->next = cctx_first;	976	cctx->next = cctx_first;
736	cctx_first = cctx;	977	cctx_first = cctx;
737	}	978	}
738		979
739	/** coroutine switching *****************************************************/	980	/** coroutine switching *****************************************************/
740		981
741	/* never call directly, always through the coro_state_transfer global variable */	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 */
742	static void NOINLINE	1002	static void NOINLINE
743	transfer (struct coro *prev, struct coro *next)	1003	transfer (pTHX_ struct coro *prev, struct coro *next)
744	{	1004	{
745	dSTACKLEVEL;	1005	dSTACKLEVEL;
746		1006
747	/* sometimes transfer is only called to set idle_sp */	1007	/* sometimes transfer is only called to set idle_sp */
748	if (!next)	1008	if (expect_false (!next))
749	{	1009	{
750	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1010	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
751	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */	1011	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
752	}	1012	}
753	else if (prev != next)	1013	else if (expect_true (prev != next))
754	{	1014	{
755	coro_cctx *prev__cctx;	1015	coro_cctx *prev__cctx;
756		1016
757	if (prev->flags & CF_NEW)	1017	if (expect_false (prev->flags & CF_NEW))
758	{	1018	{
759	/* create a new empty context */	1019	/* create a new empty context */
760	Newz (0, prev->cctx, 1, coro_cctx);	1020	Newz (0, prev->cctx, 1, coro_cctx);
761	prev->cctx->inuse = 1;
762	prev->flags &= ~CF_NEW;	1021	prev->flags &= ~CF_NEW;
763	prev->flags |= CF_RUNNING;	1022	prev->flags |= CF_RUNNING;
764	}	1023	}
765		1024
766	/*TODO: must not croak here */
767	if (!prev->flags & CF_RUNNING)
768	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
769
770	if (next->flags & CF_RUNNING)
771	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
772
773	if (next->flags & CF_DESTROYED)
774	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
775
776	prev->flags &= ~CF_RUNNING;	1025	prev->flags &= ~CF_RUNNING;
777	next->flags |= CF_RUNNING;	1026	next->flags |= CF_RUNNING;
778		1027
779	LOCK;	1028	LOCK;
780		1029
781	if (next->flags & CF_NEW)	1030	if (expect_false (next->flags & CF_NEW))
782	{	1031	{
783	/* need to start coroutine */	1032	/* need to start coroutine */
784	next->flags &= ~CF_NEW;	1033	next->flags &= ~CF_NEW;
785	/* first get rid of the old state */	1034	/* first get rid of the old state */
786	save_perl (prev);	1035	save_perl (aTHX_ prev);
787	/* setup coroutine call */	1036	/* setup coroutine call */
788	setup_coro (next);	1037	coro_setup (aTHX_ next);
789	/* need a new stack */
790	assert (!next->cctx);
791	}	1038	}
792	else	1039	else
793	{	1040	{
794	/* coroutine already started */	1041	/* coroutine already started */
795	save_perl (prev);	1042	save_perl (aTHX_ prev);
796	load_perl (next);	1043	load_perl (aTHX_ next);
797	}	1044	}
798		1045
799	prev__cctx = prev->cctx;	1046	prev__cctx = prev->cctx;
800		1047
801	/* possibly "free" the cctx */	1048	/* possibly "free" the cctx */
802	if (prev__cctx->idle_sp == STACKLEVEL)	1049	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
803	{	1050	{
804	/* 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 */
805	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));
806		1053
807	prev->cctx = 0;	1054	prev->cctx = 0;
808		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
809	cctx_put (prev__cctx);	1061	cctx_put (prev__cctx);
810	prev__cctx->inuse = 0;
811	}	1062	}
812		1063
		1064	++next->usecount;
		1065
813	if (!next->cctx)	1066	if (expect_true (!next->cctx))
814	{
815	next->cctx = cctx_get ();	1067	next->cctx = cctx_get (aTHX);
816	assert (!next->cctx->inuse);
817	next->cctx->inuse = 1;
818	}
819		1068
820	if (prev__cctx != next->cctx)	1069	if (expect_false (prev__cctx != next->cctx))
821	{	1070	{
822	prev__cctx->top_env = PL_top_env;	1071	prev__cctx->top_env = PL_top_env;
823	PL_top_env = next->cctx->top_env;	1072	PL_top_env = next->cctx->top_env;
824	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1073	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
825	}	1074	}
826		1075
827	free_coro_mortal ();	1076	free_coro_mortal (aTHX);
828	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	}
829	}	1091	}
830	}	1092	}
831		1093
832	struct transfer_args	1094	struct transfer_args
833	{	1095	{
834	struct coro *prev, *next;	1096	struct coro *prev, *next;
835	};	1097	};
836		1098
837	#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)
838		1101
839	/** high level stuff ********************************************************/	1102	/** high level stuff ********************************************************/
840		1103
841	static int	1104	static int
842	coro_state_destroy (struct coro *coro)	1105	coro_state_destroy (pTHX_ struct coro *coro)
843	{	1106	{
844	if (coro->flags & CF_DESTROYED)	1107	if (coro->flags & CF_DESTROYED)
845	return 0;	1108	return 0;
846		1109
847	coro->flags |= CF_DESTROYED;	1110	coro->flags |= CF_DESTROYED;
…		…
859		1122
860	if (coro->mainstack && coro->mainstack != main_mainstack)	1123	if (coro->mainstack && coro->mainstack != main_mainstack)
861	{	1124	{
862	struct coro temp;	1125	struct coro temp;
863		1126
864	assert (!(coro->flags & CF_RUNNING));
865
866	Zero (&temp, 1, struct coro);
867	temp.save = CORO_SAVE_ALL;
868
869	if (coro->flags & CF_RUNNING)	1127	if (coro->flags & CF_RUNNING)
870	croak ("FATAL: tried to destroy currently running coroutine");	1128	croak ("FATAL: tried to destroy currently running coroutine");
871		1129
872	save_perl (&temp);	1130	save_perl (aTHX_ &temp);
873	load_perl (coro);	1131	load_perl (aTHX_ coro);
874		1132
875	coro_destroy_stacks ();	1133	coro_destroy (aTHX_ coro);
876		1134
877	load_perl (&temp); /* this will get rid of defsv etc.. */	1135	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
878		1136
879	coro->mainstack = 0;	1137	coro->mainstack = 0;
880	}	1138	}
881		1139
882	cctx_destroy (coro->cctx);	1140	cctx_destroy (coro->cctx);
883	SvREFCNT_dec (coro->args);	1141	SvREFCNT_dec (coro->args);
884		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
885	return 1;	1147	return 1;
886	}	1148	}
887		1149
888	static int	1150	static int
889	coro_state_free (pTHX_ SV *sv, MAGIC *mg)	1151	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
890	{	1152	{
891	struct coro *coro = (struct coro *)mg->mg_ptr;	1153	struct coro *coro = (struct coro *)mg->mg_ptr;
892	mg->mg_ptr = 0;	1154	mg->mg_ptr = 0;
893		1155
		1156	coro->hv = 0;
		1157
894	if (--coro->refcnt < 0)	1158	if (--coro->refcnt < 0)
895	{	1159	{
896	coro_state_destroy (coro);	1160	coro_state_destroy (aTHX_ coro);
897	Safefree (coro);	1161	Safefree (coro);
898	}	1162	}
899		1163
900	return 0;	1164	return 0;
901	}	1165	}
…		…
919	#else	1183	#else
920	# define MGf_DUP 0	1184	# define MGf_DUP 0
921	#endif	1185	#endif
922	};	1186	};
923		1187
924	static struct coro *
925	SvSTATE (SV *coro)
926	{
927	HV *stash;
928	MAGIC *mg;
929
930	if (SvROK (coro))
931	coro = SvRV (coro);
932
933	stash = SvSTASH (coro);
934	if (stash != coro_stash && stash != coro_state_stash)
935	{
936	/* very slow, but rare, check */
937	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
938	croak ("Coro::State object required");
939	}
940
941	mg = SvMAGIC (coro);
942	assert (mg->mg_type == PERL_MAGIC_ext);
943	return (struct coro *)mg->mg_ptr;
944	}
945
946	static void	1188	static void
947	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)
948	{	1190	{
949	ta->prev = SvSTATE (prev_sv);	1191	ta->prev = SvSTATE (prev_sv);
950	ta->next = SvSTATE (next_sv);	1192	ta->next = SvSTATE (next_sv);
		1193	TRANSFER_CHECK (*ta);
951	}	1194	}
952		1195
953	static void	1196	static void
954	api_transfer (SV *prev_sv, SV *next_sv)	1197	api_transfer (SV *prev_sv, SV *next_sv)
955	{	1198	{
		1199	dTHX;
956	struct transfer_args ta;	1200	struct transfer_args ta;
957		1201
958	prepare_transfer (&ta, prev_sv, next_sv);	1202	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
959	TRANSFER (ta);	1203	TRANSFER (ta);
960	}	1204	}
961		1205
962	static int
963	api_save (SV *coro_sv, int new_save)
964	{
965	struct coro *coro = SvSTATE (coro_sv);
966	int old_save = coro->save;
967
968	if (new_save >= 0)
969	coro->save = new_save;
970
971	return old_save;
972	}
973
974	/** Coro ********************************************************************/	1206	/** Coro ********************************************************************/
975		1207
976	static void	1208	static void
977	coro_enq (SV *coro_sv)	1209	coro_enq (pTHX_ SV *coro_sv)
978	{	1210	{
979	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);
980	}	1212	}
981		1213
982	static SV *	1214	static SV *
983	coro_deq (int min_prio)	1215	coro_deq (pTHX_ int min_prio)
984	{	1216	{
985	int prio = PRIO_MAX - PRIO_MIN;	1217	int prio = PRIO_MAX - PRIO_MIN;
986		1218
987	min_prio -= PRIO_MIN;	1219	min_prio -= PRIO_MIN;
988	if (min_prio < 0)	1220	if (min_prio < 0)
…		…
996	}	1228	}
997		1229
998	static int	1230	static int
999	api_ready (SV *coro_sv)	1231	api_ready (SV *coro_sv)
1000	{	1232	{
		1233	dTHX;
1001	struct coro *coro;	1234	struct coro *coro;
1002		1235
1003	if (SvROK (coro_sv))	1236	if (SvROK (coro_sv))
1004	coro_sv = SvRV (coro_sv);	1237	coro_sv = SvRV (coro_sv);
1005		1238
…		…
1009	return 0;	1242	return 0;
1010		1243
1011	coro->flags |= CF_READY;	1244	coro->flags |= CF_READY;
1012		1245
1013	LOCK;	1246	LOCK;
1014	coro_enq (SvREFCNT_inc (coro_sv));	1247	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
1015	++coro_nready;	1248	++coro_nready;
1016	UNLOCK;	1249	UNLOCK;
1017		1250
1018	return 1;	1251	return 1;
1019	}	1252	}
1020		1253
1021	static int	1254	static int
1022	api_is_ready (SV *coro_sv)	1255	api_is_ready (SV *coro_sv)
1023	{	1256	{
		1257	dTHX;
1024	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1258	return !!(SvSTATE (coro_sv)->flags & CF_READY);
1025	}	1259	}
1026		1260
1027	static void	1261	static void
1028	prepare_schedule (struct transfer_args *ta)	1262	prepare_schedule (pTHX_ struct transfer_args *ta)
1029	{	1263	{
1030	SV *prev_sv, *next_sv;	1264	SV *prev_sv, *next_sv;
1031		1265
1032	for (;;)	1266	for (;;)
1033	{	1267	{
1034	LOCK;	1268	LOCK;
1035	next_sv = coro_deq (PRIO_MIN);	1269	next_sv = coro_deq (aTHX_ PRIO_MIN);
1036		1270
1037	/* nothing to schedule: call the idle handler */	1271	/* nothing to schedule: call the idle handler */
1038	if (!next_sv)	1272	if (expect_false (!next_sv))
1039	{	1273	{
1040	dSP;	1274	dSP;
1041	UNLOCK;	1275	UNLOCK;
1042		1276
1043	ENTER;	1277	ENTER;
…		…
1053	}	1287	}
1054		1288
1055	ta->next = SvSTATE (next_sv);	1289	ta->next = SvSTATE (next_sv);
1056		1290
1057	/* cannot transfer to destroyed coros, skip and look for next */	1291	/* cannot transfer to destroyed coros, skip and look for next */
1058	if (ta->next->flags & CF_DESTROYED)	1292	if (expect_false (ta->next->flags & CF_DESTROYED))
1059	{	1293	{
1060	UNLOCK;	1294	UNLOCK;
1061	SvREFCNT_dec (next_sv);	1295	SvREFCNT_dec (next_sv);
1062	/* coro_nready is already taken care of by destroy */	1296	/* coro_nready is already taken care of by destroy */
1063	continue;	1297	continue;
…		…
1068	break;	1302	break;
1069	}	1303	}
1070		1304
1071	/* free this only after the transfer */	1305	/* free this only after the transfer */
1072	prev_sv = SvRV (coro_current);	1306	prev_sv = SvRV (coro_current);
1073	SvRV_set (coro_current, next_sv);
1074	ta->prev = SvSTATE (prev_sv);	1307	ta->prev = SvSTATE (prev_sv);
1075		1308	TRANSFER_CHECK (*ta);
1076	assert (ta->next->flags & CF_READY);	1309	assert (ta->next->flags & CF_READY);
1077	ta->next->flags &= ~CF_READY;	1310	ta->next->flags &= ~CF_READY;
		1311	SvRV_set (coro_current, next_sv);
1078		1312
1079	LOCK;	1313	LOCK;
1080	free_coro_mortal ();	1314	free_coro_mortal (aTHX);
1081	coro_mortal = prev_sv;	1315	coro_mortal = prev_sv;
1082	UNLOCK;	1316	UNLOCK;
1083	}	1317	}
1084		1318
1085	static void	1319	static void
1086	prepare_cede (struct transfer_args *ta)	1320	prepare_cede (pTHX_ struct transfer_args *ta)
1087	{	1321	{
1088	api_ready (coro_current);	1322	api_ready (coro_current);
1089	prepare_schedule (ta);	1323	prepare_schedule (aTHX_ ta);
1090	}	1324	}
1091		1325
1092	static int	1326	static int
1093	prepare_cede_notself (struct transfer_args *ta)	1327	prepare_cede_notself (pTHX_ struct transfer_args *ta)
1094	{	1328	{
1095	if (coro_nready)	1329	if (coro_nready)
1096	{	1330	{
1097	SV *prev = SvRV (coro_current);	1331	SV *prev = SvRV (coro_current);
1098	prepare_schedule (ta);	1332	prepare_schedule (aTHX_ ta);
1099	api_ready (prev);	1333	api_ready (prev);
1100	return 1;	1334	return 1;
1101	}	1335	}
1102	else	1336	else
1103	return 0;	1337	return 0;
1104	}	1338	}
1105		1339
1106	static void	1340	static void
1107	api_schedule (void)	1341	api_schedule (void)
1108	{	1342	{
		1343	dTHX;
1109	struct transfer_args ta;	1344	struct transfer_args ta;
1110		1345
1111	prepare_schedule (&ta);	1346	prepare_schedule (aTHX_ &ta);
1112	TRANSFER (ta);	1347	TRANSFER (ta);
1113	}	1348	}
1114		1349
1115	static int	1350	static int
1116	api_cede (void)	1351	api_cede (void)
1117	{	1352	{
		1353	dTHX;
1118	struct transfer_args ta;	1354	struct transfer_args ta;
1119		1355
1120	prepare_cede (&ta);	1356	prepare_cede (aTHX_ &ta);
1121		1357
1122	if (ta.prev != ta.next)	1358	if (expect_true (ta.prev != ta.next))
1123	{	1359	{
1124	TRANSFER (ta);	1360	TRANSFER (ta);
1125	return 1;	1361	return 1;
1126	}	1362	}
1127	else	1363	else
…		…
1129	}	1365	}
1130		1366
1131	static int	1367	static int
1132	api_cede_notself (void)	1368	api_cede_notself (void)
1133	{	1369	{
		1370	dTHX;
1134	struct transfer_args ta;	1371	struct transfer_args ta;
1135		1372
1136	if (prepare_cede_notself (&ta))	1373	if (prepare_cede_notself (aTHX_ &ta))
1137	{	1374	{
1138	TRANSFER (ta);	1375	TRANSFER (ta);
1139	return 1;	1376	return 1;
1140	}	1377	}
1141	else	1378	else
1142	return 0;	1379	return 0;
1143	}	1380	}
1144		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
1145	MODULE = Coro::State PACKAGE = Coro::State	1408	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1146		1409
1147	PROTOTYPES: DISABLE	1410	PROTOTYPES: DISABLE
1148		1411
1149	BOOT:	1412	BOOT:
1150	{	1413	{
1151	#ifdef USE_ITHREADS	1414	#ifdef USE_ITHREADS
1152	MUTEX_INIT (&coro_mutex);	1415	MUTEX_INIT (&coro_mutex);
1153	#endif	1416	#endif
1154	BOOT_PAGESIZE;	1417	BOOT_PAGESIZE;
1155		1418
		1419	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1420	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1421
1156	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1422	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1157		1423
		1424	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1425	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1158	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1426	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1159	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1160	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1161	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1162	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1427	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1163		1428
1164	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;
1165		1434
1166	coroapi.ver = CORO_API_VERSION;	1435	coroapi.ver = CORO_API_VERSION;
1167	coroapi.transfer = api_transfer;	1436	coroapi.transfer = api_transfer;
1168		1437
1169	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1438	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1176	struct coro *coro;	1445	struct coro *coro;
1177	HV *hv;	1446	HV *hv;
1178	int i;	1447	int i;
1179		1448
1180	Newz (0, coro, 1, struct coro);	1449	Newz (0, coro, 1, struct coro);
1181	coro->args = newAV ();	1450	coro->args = newAV ();
1182	coro->save = CORO_SAVE_ALL;
1183	coro->flags = CF_NEW;	1451	coro->flags = CF_NEW;
1184		1452
		1453	if (coro_first) coro_first->prev = coro;
		1454	coro->next = coro_first;
		1455	coro_first = coro;
		1456
1185	hv = newHV ();	1457	coro->hv = hv = newHV ();
1186	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;
1187	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1459	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1188		1460
		1461	av_extend (coro->args, items - 1);
1189	for (i = 1; i < items; i++)	1462	for (i = 1; i < items; i++)
1190	av_push (coro->args, newSVsv (ST (i)));	1463	av_push (coro->args, newSVsv (ST (i)));
1191	}	1464	}
1192	OUTPUT:	1465	OUTPUT:
1193	RETVAL	1466	RETVAL
1194		1467
1195	int	1468	# these not obviously related functions are all rolled into the same xs
1196	save (SV *coro, int new_save = -1)	1469	# function to increase chances that they all will call transfer with the same
1197	CODE:	1470	# stack offset
1198	RETVAL = api_save (coro, new_save);
1199	OUTPUT:
1200	RETVAL
1201
1202	void	1471	void
1203	_set_stacklevel (...)	1472	_set_stacklevel (...)
1204	ALIAS:	1473	ALIAS:
1205	Coro::State::transfer = 1	1474	Coro::State::transfer = 1
1206	Coro::schedule = 2	1475	Coro::schedule = 2
…		…
1219		1488
1220	case 1:	1489	case 1:
1221	if (items != 2)	1490	if (items != 2)
1222	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);
1223		1492
1224	prepare_transfer (&ta, ST (0), ST (1));	1493	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1225	break;	1494	break;
1226		1495
1227	case 2:	1496	case 2:
1228	prepare_schedule (&ta);	1497	prepare_schedule (aTHX_ &ta);
1229	break;	1498	break;
1230		1499
1231	case 3:	1500	case 3:
1232	prepare_cede (&ta);	1501	prepare_cede (aTHX_ &ta);
1233	break;	1502	break;
1234		1503
1235	case 4:	1504	case 4:
1236	if (!prepare_cede_notself (&ta))	1505	if (!prepare_cede_notself (aTHX_ &ta))
1237	XSRETURN_EMPTY;	1506	XSRETURN_EMPTY;
1238		1507
1239	break;	1508	break;
1240	}	1509	}
1241		1510
1242	BARRIER;	1511	BARRIER;
1243	TRANSFER (ta);	1512	TRANSFER (ta);
1244		1513
1245	if (GIMME_V != G_VOID && ta.next != ta.prev)	1514	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1246	XSRETURN_YES;	1515	XSRETURN_YES;
1247	}	1516	}
1248		1517
1249	bool	1518	bool
1250	_destroy (SV *coro_sv)	1519	_destroy (SV *coro_sv)
1251	CODE:	1520	CODE:
1252	RETVAL = coro_state_destroy (SvSTATE (coro_sv));	1521	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1253	OUTPUT:	1522	OUTPUT:
1254	RETVAL	1523	RETVAL
1255		1524
1256	void	1525	void
1257	_exit (code)	1526	_exit (code)
…		…
1259	PROTOTYPE: $	1528	PROTOTYPE: $
1260	CODE:	1529	CODE:
1261	_exit (code);	1530	_exit (code);
1262		1531
1263	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
1264	cctx_count ()	1542	cctx_count ()
1265	CODE:	1543	CODE:
1266	RETVAL = cctx_count;	1544	RETVAL = cctx_count;
1267	OUTPUT:	1545	OUTPUT:
1268	RETVAL	1546	RETVAL
…		…
1272	CODE:	1550	CODE:
1273	RETVAL = cctx_idle;	1551	RETVAL = cctx_idle;
1274	OUTPUT:	1552	OUTPUT:
1275	RETVAL	1553	RETVAL
1276		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
1277	MODULE = Coro::State PACKAGE = Coro	1653	MODULE = Coro::State PACKAGE = Coro
1278		1654
1279	BOOT:	1655	BOOT:
1280	{	1656	{
1281	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);
1282		1665
1283	coro_stash = gv_stashpv ("Coro", TRUE);	1666	coro_stash = gv_stashpv ("Coro", TRUE);
1284		1667
1285	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1668	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1286	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1669	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1287	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1670	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1288	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1671	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1289	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1672	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1290	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1673	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1291		1674
1292	coro_current = get_sv ("Coro::current", FALSE);
1293	SvREADONLY_on (coro_current);
1294
1295	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1675	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1296	coro_ready[i] = newAV ();	1676	coro_ready[i] = newAV ();
1297		1677
1298	{	1678	{
1299	SV *sv = perl_get_sv("Coro::API", 1);	1679	SV *sv = perl_get_sv("Coro::API", 1);
1300		1680
1301	coroapi.schedule = api_schedule;	1681	coroapi.schedule = api_schedule;
1302	coroapi.save = api_save;
1303	coroapi.cede = api_cede;	1682	coroapi.cede = api_cede;
1304	coroapi.cede_notself = api_cede_notself;	1683	coroapi.cede_notself = api_cede_notself;
1305	coroapi.ready = api_ready;	1684	coroapi.ready = api_ready;
1306	coroapi.is_ready = api_is_ready;	1685	coroapi.is_ready = api_is_ready;
1307	coroapi.nready = &coro_nready;	1686	coroapi.nready = &coro_nready;
…		…
1348	CODE:	1727	CODE:
1349	RETVAL = boolSV (api_ready (self));	1728	RETVAL = boolSV (api_ready (self));
1350	OUTPUT:	1729	OUTPUT:
1351	RETVAL	1730	RETVAL
1352		1731
1353	SV *
1354	is_ready (SV *self)
1355	PROTOTYPE: $
1356	CODE:
1357	RETVAL = boolSV (api_is_ready (self));
1358	OUTPUT:
1359	RETVAL
1360
1361	int	1732	int
1362	nready (...)	1733	nready (...)
1363	PROTOTYPE:	1734	PROTOTYPE:
1364	CODE:	1735	CODE:
1365	RETVAL = coro_nready;	1736	RETVAL = coro_nready;
1366	OUTPUT:	1737	OUTPUT:
1367	RETVAL	1738	RETVAL
1368		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
1369	MODULE = Coro::State PACKAGE = Coro::AIO	1811	MODULE = Coro::State PACKAGE = Coro::AIO
1370		1812
1371	SV *	1813	SV *
1372	_get_state ()	1814	_get_state ()
1373	CODE:	1815	CODE:

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