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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.114 by root, Thu Nov 30 21:22:45 2006 UTC vs.
Revision 1.189 by root, Fri Oct 5 20:38:43 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
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \
15	|| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \
17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19	#if !PERL_VERSION_ATLEAST (5,6,0)
20	# ifndef PL_ppaddr
21	# define PL_ppaddr ppaddr
22	# endif
23	# ifndef call_sv
24	# define call_sv perl_call_sv
25	# endif
26	# ifndef get_sv
27	# define get_sv perl_get_sv
28	# endif
29	# ifndef get_cv
30	# define get_cv perl_get_cv
31	# endif
32	# ifndef IS_PADGV
33	# define IS_PADGV(v) 0
34	# endif
35	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0
37	# endif
38	#endif
39
40	#include <stdio.h>	11	#include <stdio.h>
41	#include <errno.h>	12	#include <errno.h>
42		13	#include <assert.h>
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44	# undef STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50		14
51	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
52	# include <unistd.h>	16	# include <unistd.h>
53	# include <sys/mman.h>	17	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
69	#else	33	#else
70	# define PAGESIZE 0	34	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
72	#endif	36	#endif
73		37
74	/* The next macro should declare a variable stacklevel that contains and approximation	38	#if CORO_USE_VALGRIND
75	* to the current C stack pointer. Its property is that it changes with each call	39	# include <valgrind/valgrind.h>
76	* and should be unique. */	40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
		55	# ifndef PL_ppaddr
		56	# define PL_ppaddr ppaddr
		57	# endif
		58	# ifndef call_sv
		59	# define call_sv perl_call_sv
		60	# endif
		61	# ifndef get_sv
		62	# define get_sv perl_get_sv
		63	# endif
		64	# ifndef get_cv
		65	# define get_cv perl_get_cv
		66	# endif
		67	# ifndef IS_PADGV
		68	# define IS_PADGV(v) 0
		69	# endif
		70	# ifndef IS_PADCONST
		71	# define IS_PADCONST(v) 0
		72	# endif
		73	#endif
		74
		75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		81	# undef CORO_STACKGUARD
		82	#endif
		83
		84	#ifndef CORO_STACKGUARD
		85	# define CORO_STACKGUARD 0
		86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
		93	/* The next macros try to return the current stack pointer, in an as
		94	* portable way as possible. */
77	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	96	#define STACKLEVEL ((void *)&stacklevel)
79		97
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		99
82	#if __GNUC__ >= 3	100	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
84	#else	103	#else
85	# define attribute(x)	104	# define attribute(x)
		105	# define BARRIER
86	#endif	106	#endif
87		107
88	#define NOINLINE attribute ((noinline))	108	#define NOINLINE attribute ((noinline))
89		109
90	#include "CoroAPI.h"	110	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		111
94	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	116	#else
99	# define LOCK (void)0	117	# define LOCK (void)0
100	# define UNLOCK (void)0	118	# define UNLOCK (void)0
101	#endif	119	#endif
102		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
103	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
104	static AV *main_mainstack; /* used to differentiate between $main and others */	132	static AV *main_mainstack; /* used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
105	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
107		136
		137	static GV *irsgv; /* $/ */
		138	static GV *stdoutgv; /* *STDOUT */
		139
		140	/* async_pool helper stuff */
		141	static SV *sv_pool_rss;
		142	static SV *sv_pool_size;
		143	static AV *av_async_pool;
		144
108	static struct coro_cctx *cctx_first;	145	static struct coro_cctx *cctx_first;
109	static int cctx_count, cctx_idle;	146	static int cctx_count, cctx_idle;
		147
		148	enum {
		149	CC_MAPPED = 0x01,
		150	CC_NOREUSE = 0x02, /* throw this away after tracing */
		151	CC_TRACE = 0x04,
		152	CC_TRACE_SUB = 0x08, /* trace sub calls */
		153	CC_TRACE_LINE = 0x10, /* trace each statement */
		154	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		155	};
110		156
111	/* this is a structure representing a c-level coroutine */	157	/* this is a structure representing a c-level coroutine */
112	typedef struct coro_cctx {	158	typedef struct coro_cctx {
113	struct coro_cctx *next;	159	struct coro_cctx *next;
114		160
115	/* the stack */	161	/* the stack */
116	void *sptr;	162	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	163	size_t ssize;
118		164
119	/* cpu state */	165	/* cpu state */
120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	166	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		167	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	168	JMPENV *top_env;
122	coro_context cctx;	169	coro_context cctx;
123		170
124	int inuse;
125
126	#if USE_VALGRIND	171	#if CORO_USE_VALGRIND
127	int valgrind_id;	172	int valgrind_id;
128	#endif	173	#endif
		174	unsigned char flags;
129	} coro_cctx;	175	} coro_cctx;
130		176
131	enum {	177	enum {
132	CF_RUNNING, /* coroutine is running */	178	CF_RUNNING = 0x0001, /* coroutine is running */
133	CF_READY, /* coroutine is ready */	179	CF_READY = 0x0002, /* coroutine is ready */
		180	CF_NEW = 0x0004, /* has never been switched to */
		181	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
134	};	182	};
135		183
136	/* this is a structure representing a perl-level coroutine */	184	/* this is a structure representing a perl-level coroutine */
137	struct coro {	185	struct coro {
138	/* the c coroutine allocated to this perl coroutine, if any */	186	/* the c coroutine allocated to this perl coroutine, if any */
139	coro_cctx *cctx;	187	coro_cctx *cctx;
140		188
141	/* data associated with this coroutine (initial args) */	189	/* data associated with this coroutine (initial args) */
142	AV *args;	190	AV *args;
143	int refcnt;	191	int refcnt;
144	int flags;	192	int flags; /* CF_ flags */
145		193
146	/* optionally saved, might be zero */	194	/* optionally saved, might be zero */
147	AV *defav;	195	AV *defav; /* @_ */
148	SV *defsv;	196	SV *defsv; /* $_ */
149	SV *errsv;	197	SV *errsv; /* $@ */
		198	SV *deffh; /* default filehandle */
		199	SV *irssv; /* $/ */
		200	SV *irssv_sv; /* real $/ cache */
150		201
151	#define VAR(name,type) type name;	202	#define VAR(name,type) type name;
152	# include "state.h"	203	# include "state.h"
153	#undef VAR	204	#undef VAR
154		205
		206	/* statistics */
		207	int usecount; /* number of transfers to this coro */
		208
155	/* coro process data */	209	/* coro process data */
156	int prio;	210	int prio;
		211	//SV *throw;
		212
		213	/* async_pool */
		214	SV *saved_deffh;
		215
		216	/* linked list */
		217	struct coro *next, *prev;
		218	HV *hv; /* the perl hash associated with this coro, if any */
157	};	219	};
158		220
159	typedef struct coro *Coro__State;	221	typedef struct coro *Coro__State;
160	typedef struct coro *Coro__State_or_hashref;	222	typedef struct coro *Coro__State_or_hashref;
161		223
		224	/** Coro ********************************************************************/
		225
		226	#define PRIO_MAX 3
		227	#define PRIO_HIGH 1
		228	#define PRIO_NORMAL 0
		229	#define PRIO_LOW -1
		230	#define PRIO_IDLE -3
		231	#define PRIO_MIN -4
		232
		233	/* for Coro.pm */
		234	static SV *coro_current;
		235	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		236	static int coro_nready;
		237	static struct coro *coro_first;
		238
		239	/** lowlevel stuff **********************************************************/
		240
162	static AV *	241	static AV *
163	coro_clone_padlist (CV *cv)	242	coro_clone_padlist (pTHX_ CV *cv)
164	{	243	{
165	AV *padlist = CvPADLIST (cv);	244	AV *padlist = CvPADLIST (cv);
166	AV *newpadlist, *newpad;	245	AV *newpadlist, *newpad;
167		246
168	newpadlist = newAV ();	247	newpadlist = newAV ();
…		…
180		259
181	return newpadlist;	260	return newpadlist;
182	}	261	}
183		262
184	static void	263	static void
185	free_padlist (AV *padlist)	264	free_padlist (pTHX_ AV *padlist)
186	{	265	{
187	/* may be during global destruction */	266	/* may be during global destruction */
188	if (SvREFCNT (padlist))	267	if (SvREFCNT (padlist))
189	{	268	{
190	I32 i = AvFILLp (padlist);	269	I32 i = AvFILLp (padlist);
…		…
211	AV *padlist;	290	AV *padlist;
212	AV *av = (AV *)mg->mg_obj;	291	AV *av = (AV *)mg->mg_obj;
213		292
214	/* casting is fun. */	293	/* casting is fun. */
215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	294	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
216	free_padlist (padlist);	295	free_padlist (aTHX_ padlist);
217		296
218	SvREFCNT_dec (av);	297	SvREFCNT_dec (av);
219		298
220	return 0;	299	return 0;
221	}	300	}
…		…
229	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	308	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
230	? SvMAGIC (cv) \	309	? SvMAGIC (cv) \
231	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	310	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
232	: 0	311	: 0
233		312
		313	static struct coro *
		314	SvSTATE_ (pTHX_ SV *coro)
		315	{
		316	HV *stash;
		317	MAGIC *mg;
		318
		319	if (SvROK (coro))
		320	coro = SvRV (coro);
		321
		322	if (SvTYPE (coro) != SVt_PVHV)
		323	croak ("Coro::State object required");
		324
		325	stash = SvSTASH (coro);
		326	if (stash != coro_stash && stash != coro_state_stash)
		327	{
		328	/* very slow, but rare, check */
		329	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		330	croak ("Coro::State object required");
		331	}
		332
		333	mg = CORO_MAGIC (coro);
		334	return (struct coro *)mg->mg_ptr;
		335	}
		336
		337	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		338
234	/* the next two functions merely cache the padlists */	339	/* the next two functions merely cache the padlists */
235	static void	340	static void
236	get_padlist (CV *cv)	341	get_padlist (pTHX_ CV *cv)
237	{	342	{
238	MAGIC *mg = CORO_MAGIC (cv);	343	MAGIC *mg = CORO_MAGIC (cv);
239	AV *av;	344	AV *av;
240		345
241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	346	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	347	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	348	else
244	{	349	{
245	#if 0	350	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	351	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	352	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	353	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	354	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	355	SvREFCNT_dec (cp);
251	#else	356	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	357	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	358	#endif
254	}	359	}
255	}	360	}
256		361
257	static void	362	static void
258	put_padlist (CV *cv)	363	put_padlist (pTHX_ CV *cv)
259	{	364	{
260	MAGIC *mg = CORO_MAGIC (cv);	365	MAGIC *mg = CORO_MAGIC (cv);
261	AV *av;	366	AV *av;
262		367
263	if (!mg)	368	if (!mg)
…		…
274	av_extend (av, AvMAX (av) + 1);	379	av_extend (av, AvMAX (av) + 1);
275		380
276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	381	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277	}	382	}
278		383
279	#define SB do {	384	/** load & save, init *******************************************************/
280	#define SE } while (0)
281		385
282	#define LOAD(state) load_state((state));
283	#define SAVE(state,flags) save_state((state),(flags));
284
285	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
286
287	static void	386	static void
288	load_state(Coro__State c)	387	load_perl (pTHX_ Coro__State c)
289	{	388	{
290	#define VAR(name,type) PL_ ## name = c->name;	389	#define VAR(name,type) PL_ ## name = c->name;
291	# include "state.h"	390	# include "state.h"
292	#undef VAR	391	#undef VAR
293		392
294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	393	GvSV (PL_defgv) = c->defsv;
295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	394	GvAV (PL_defgv) = c->defav;
296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	395	GvSV (PL_errgv) = c->errsv;
		396	GvSV (irsgv) = c->irssv_sv;
297		397
298	{	398	{
299	dSP;	399	dSP;
300	CV *cv;	400	CV *cv;
301		401
302	/* now do the ugly restore mess */	402	/* now do the ugly restore mess */
303	while ((cv = (CV *)POPs))	403	while ((cv = (CV *)POPs))
304	{	404	{
305	put_padlist (cv); /* mark this padlist as available */	405	put_padlist (aTHX_ cv); /* mark this padlist as available */
306	CvDEPTH (cv) = PTR2IV (POPs);	406	CvDEPTH (cv) = PTR2IV (POPs);
307	CvPADLIST (cv) = (AV *)POPs;	407	CvPADLIST (cv) = (AV *)POPs;
308	}	408	}
309		409
310	PUTBACK;	410	PUTBACK;
311	}	411	}
312	}	412	}
313		413
314	static void	414	static void
315	save_state(Coro__State c, int flags)	415	save_perl (pTHX_ Coro__State c)
316	{	416	{
317	{	417	{
318	dSP;	418	dSP;
319	I32 cxix = cxstack_ix;	419	I32 cxix = cxstack_ix;
320	PERL_CONTEXT *ccstk = cxstack;	420	PERL_CONTEXT *ccstk = cxstack;
…		…
323	/*	423	/*
324	* the worst thing you can imagine happens first - we have to save	424	* the worst thing you can imagine happens first - we have to save
325	* (and reinitialize) all cv's in the whole callchain :(	425	* (and reinitialize) all cv's in the whole callchain :(
326	*/	426	*/
327		427
328	PUSHs (Nullsv);	428	XPUSHs (Nullsv);
329	/* this loop was inspired by pp_caller */	429	/* this loop was inspired by pp_caller */
330	for (;;)	430	for (;;)
331	{	431	{
332	while (cxix >= 0)	432	while (cxix >= 0)
333	{	433	{
334	PERL_CONTEXT *cx = &ccstk[cxix--];	434	PERL_CONTEXT *cx = &ccstk[cxix--];
335		435
336	if (CxTYPE(cx) == CXt_SUB)	436	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
337	{	437	{
338	CV *cv = cx->blk_sub.cv;	438	CV *cv = cx->blk_sub.cv;
339		439
340	if (CvDEPTH (cv))	440	if (CvDEPTH (cv))
341	{	441	{
342	EXTEND (SP, 3);	442	EXTEND (SP, 3);
343
344	PUSHs ((SV *)CvPADLIST(cv));	443	PUSHs ((SV *)CvPADLIST (cv));
345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	444	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
346	PUSHs ((SV *)cv);	445	PUSHs ((SV *)cv);
347		446
348	CvDEPTH (cv) = 0;	447	CvDEPTH (cv) = 0;
349	get_padlist (cv);	448	get_padlist (aTHX_ cv);
350	}	449	}
351	}	450	}
352	#ifdef CXt_FORMAT
353	else if (CxTYPE(cx) == CXt_FORMAT)
354	{
355	/* I never used formats, so how should I know how these are implemented? */
356	/* my bold guess is as a simple, plain sub... */
357	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
358	}
359	#endif
360	}	451	}
361		452
362	if (top_si->si_type == PERLSI_MAIN)	453	if (top_si->si_type == PERLSI_MAIN)
363	break;	454	break;
364		455
365	top_si = top_si->si_prev;	456	top_si = top_si->si_prev;
366	ccstk = top_si->si_cxstack;	457	ccstk = top_si->si_cxstack;
367	cxix = top_si->si_cxix;	458	cxix = top_si->si_cxix;
368	}	459	}
369		460
370	PUTBACK;	461	PUTBACK;
371	}	462	}
372		463
373	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	464	c->defav = GvAV (PL_defgv);
374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	465	c->defsv = DEFSV;
375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	466	c->errsv = ERRSV;
		467	c->irssv_sv = GvSV (irsgv);
376		468
377	#define VAR(name,type)c->name = PL_ ## name;	469	#define VAR(name,type)c->name = PL_ ## name;
378	# include "state.h"	470	# include "state.h"
379	#undef VAR	471	#undef VAR
380	}	472	}
…		…
383	* allocate various perl stacks. This is an exact copy	475	* allocate various perl stacks. This is an exact copy
384	* of perl.c:init_stacks, except that it uses less memory	476	* of perl.c:init_stacks, except that it uses less memory
385	* on the (sometimes correct) assumption that coroutines do	477	* on the (sometimes correct) assumption that coroutines do
386	* not usually need a lot of stackspace.	478	* not usually need a lot of stackspace.
387	*/	479	*/
		480	#if CORO_PREFER_PERL_FUNCTIONS
		481	# define coro_init_stacks init_stacks
		482	#else
388	static void	483	static void
389	coro_init_stacks ()	484	coro_init_stacks (pTHX)
390	{	485	{
391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	486	PL_curstackinfo = new_stackinfo(64, 6);
392	PL_curstackinfo->si_type = PERLSI_MAIN;	487	PL_curstackinfo->si_type = PERLSI_MAIN;
393	PL_curstack = PL_curstackinfo->si_stack;	488	PL_curstack = PL_curstackinfo->si_stack;
394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395		490
396	PL_stack_base = AvARRAY(PL_curstack);	491	PL_stack_base = AvARRAY(PL_curstack);
397	PL_stack_sp = PL_stack_base;	492	PL_stack_sp = PL_stack_base;
398	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399		494
400	New(50,PL_tmps_stack,96,SV*);	495	New(50,PL_tmps_stack,64,SV*);
401	PL_tmps_floor = -1;	496	PL_tmps_floor = -1;
402	PL_tmps_ix = -1;	497	PL_tmps_ix = -1;
403	PL_tmps_max = 96;	498	PL_tmps_max = 64;
404		499
405	New(54,PL_markstack,16,I32);	500	New(54,PL_markstack,16,I32);
406	PL_markstack_ptr = PL_markstack;	501	PL_markstack_ptr = PL_markstack;
407	PL_markstack_max = PL_markstack + 16;	502	PL_markstack_max = PL_markstack + 16;
408		503
…		…
412		507
413	New(54,PL_scopestack,16,I32);	508	New(54,PL_scopestack,16,I32);
414	PL_scopestack_ix = 0;	509	PL_scopestack_ix = 0;
415	PL_scopestack_max = 16;	510	PL_scopestack_max = 16;
416		511
417	New(54,PL_savestack,96,ANY);	512	New(54,PL_savestack,64,ANY);
418	PL_savestack_ix = 0;	513	PL_savestack_ix = 0;
419	PL_savestack_max = 96;	514	PL_savestack_max = 64;
420		515
421	#if !PERL_VERSION_ATLEAST (5,9,0)	516	#if !PERL_VERSION_ATLEAST (5,9,0)
422	New(54,PL_retstack,8,OP*);	517	New(54,PL_retstack,4,OP*);
423	PL_retstack_ix = 0;	518	PL_retstack_ix = 0;
424	PL_retstack_max = 8;	519	PL_retstack_max = 4;
425	#endif	520	#endif
426	}	521	}
		522	#endif
427		523
428	/*	524	/*
429	* destroy the stacks, the callchain etc...	525	* destroy the stacks, the callchain etc...
430	*/	526	*/
431	static void	527	static void
432	coro_destroy_stacks ()	528	coro_destroy_stacks (pTHX)
433	{	529	{
434	if (!IN_DESTRUCT)
435	{
436	/* is this ugly, I ask? */
437	LEAVE_SCOPE (0);
438
439	/* sure it is, but more important: is it correct?? :/ */
440	FREETMPS;
441
442	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
443	}
444
445	while (PL_curstackinfo->si_next)	530	while (PL_curstackinfo->si_next)
446	PL_curstackinfo = PL_curstackinfo->si_next;	531	PL_curstackinfo = PL_curstackinfo->si_next;
447		532
448	while (PL_curstackinfo)	533	while (PL_curstackinfo)
449	{	534	{
450	PERL_SI *p = PL_curstackinfo->si_prev;	535	PERL_SI *p = PL_curstackinfo->si_prev;
451		536
452	{ /*D*//*remove*/
453	dSP;
454	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455	PUTBACK; /* possibly superfluous */
456	}
457
458	if (!IN_DESTRUCT)	537	if (!IN_DESTRUCT)
459	{
460	dounwind (-1);/*D*//*remove*/
461	SvREFCNT_dec (PL_curstackinfo->si_stack);	538	SvREFCNT_dec (PL_curstackinfo->si_stack);
462	}
463		539
464	Safefree (PL_curstackinfo->si_cxstack);	540	Safefree (PL_curstackinfo->si_cxstack);
465	Safefree (PL_curstackinfo);	541	Safefree (PL_curstackinfo);
466	PL_curstackinfo = p;	542	PL_curstackinfo = p;
467	}	543	}
…		…
473	#if !PERL_VERSION_ATLEAST (5,9,0)	549	#if !PERL_VERSION_ATLEAST (5,9,0)
474	Safefree (PL_retstack);	550	Safefree (PL_retstack);
475	#endif	551	#endif
476	}	552	}
477		553
478	static void	554	static size_t
479	setup_coro (struct coro *coro)	555	coro_rss (pTHX_ struct coro *coro)
		556	{
		557	size_t rss = sizeof (*coro);
		558
		559	if (coro->mainstack)
		560	{
		561	if (coro->flags & CF_RUNNING)
		562	{
		563	#define VAR(name,type)coro->name = PL_ ## name;
		564	# include "state.h"
		565	#undef VAR
		566	}
		567
		568	rss += sizeof (coro->curstackinfo);
		569	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		570	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		571	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		572	rss += coro->tmps_max * sizeof (SV *);
		573	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		574	rss += coro->scopestack_max * sizeof (I32);
		575	rss += coro->savestack_max * sizeof (ANY);
		576
		577	#if !PERL_VERSION_ATLEAST (5,9,0)
		578	rss += coro->retstack_max * sizeof (OP *);
		579	#endif
		580	}
		581
		582	return rss;
		583	}
		584
		585	/** coroutine stack handling ************************************************/
		586
		587	static void
		588	coro_setup (pTHX_ struct coro *coro)
480	{	589	{
481	/*	590	/*
482	* emulate part of the perl startup here.	591	* emulate part of the perl startup here.
483	*/	592	*/
484
485	coro_init_stacks ();	593	coro_init_stacks (aTHX);
486		594
		595	PL_runops = RUNOPS_DEFAULT;
		596	PL_curcop = &PL_compiling;
		597	PL_in_eval = EVAL_NULL;
487	PL_curcop = 0;	598	PL_comppad = 0;
488	PL_in_eval = 0;
489	PL_curpm = 0;	599	PL_curpm = 0;
		600	PL_localizing = 0;
		601	PL_dirty = 0;
		602	PL_restartop = 0;
		603
		604	GvSV (PL_defgv) = NEWSV (0, 0);
		605	GvAV (PL_defgv) = coro->args; coro->args = 0;
		606	GvSV (PL_errgv) = NEWSV (0, 0);
		607	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		608	PL_rs = newSVsv (GvSV (irsgv));
		609	PL_defoutgv = SvREFCNT_inc (stdoutgv);
490		610
491	{	611	{
492	dSP;	612	dSP;
493	LOGOP myop;	613	LOGOP myop;
494		614
495	/* I have no idea why this is needed, but it is */
496	PUSHMARK (SP);
497
498	SvREFCNT_dec (GvAV (PL_defgv));
499	GvAV (PL_defgv) = coro->args; coro->args = 0;
500
501	Zero (&myop, 1, LOGOP);	615	Zero (&myop, 1, LOGOP);
502	myop.op_next = Nullop;	616	myop.op_next = Nullop;
503	myop.op_flags = OPf_WANT_VOID;	617	myop.op_flags = OPf_WANT_VOID;
504		618
		619	PUSHMARK (SP);
		620	XPUSHs (av_shift (GvAV (PL_defgv)));
		621	PUTBACK;
505	PL_op = (OP *)&myop;	622	PL_op = (OP *)&myop;
506
507	PUSHMARK (SP);
508	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
509	PUTBACK;
510	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	623	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511	SPAGAIN;	624	SPAGAIN;
512
513	ENTER; /* necessary e.g. for dounwind */
514	}	625	}
515	}
516		626
		627	ENTER; /* necessary e.g. for dounwind */
		628	}
		629
517	static void	630	static void
		631	coro_destroy (pTHX_ struct coro *coro)
		632	{
		633	if (!IN_DESTRUCT)
		634	{
		635	/* restore all saved variables and stuff */
		636	LEAVE_SCOPE (0);
		637	assert (PL_tmps_floor == -1);
		638
		639	/* free all temporaries */
		640	FREETMPS;
		641	assert (PL_tmps_ix == -1);
		642
		643	/* unwind all extra stacks */
		644	POPSTACK_TO (PL_mainstack);
		645
		646	/* unwind main stack */
		647	dounwind (-1);
		648	}
		649
		650	SvREFCNT_dec (GvSV (PL_defgv));
		651	SvREFCNT_dec (GvAV (PL_defgv));
		652	SvREFCNT_dec (GvSV (PL_errgv));
		653	SvREFCNT_dec (PL_defoutgv);
		654	SvREFCNT_dec (PL_rs);
		655	SvREFCNT_dec (GvSV (irsgv));
		656
		657	SvREFCNT_dec (coro->saved_deffh);
		658	//SvREFCNT_dec (coro->throw);
		659
		660	coro_destroy_stacks (aTHX);
		661	}
		662
		663	static void
518	free_coro_mortal ()	664	free_coro_mortal (pTHX)
519	{	665	{
520	if (coro_mortal)	666	if (coro_mortal)
521	{	667	{
522	SvREFCNT_dec (coro_mortal);	668	SvREFCNT_dec (coro_mortal);
523	coro_mortal = 0;	669	coro_mortal = 0;
524	}	670	}
525	}	671	}
526		672
		673	static int
		674	runops_trace (pTHX)
		675	{
		676	COP *oldcop = 0;
		677	int oldcxix = -2;
		678	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		679	coro_cctx *cctx = coro->cctx;
		680
		681	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		682	{
		683	PERL_ASYNC_CHECK ();
		684
		685	if (cctx->flags & CC_TRACE_ALL)
		686	{
		687	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		688	{
		689	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		690	SV **bot, **top;
		691	AV *av = newAV (); /* return values */
		692	SV **cb;
		693	dSP;
		694
		695	GV *gv = CvGV (cx->blk_sub.cv);
		696	SV *fullname = sv_2mortal (newSV (0));
		697	if (isGV (gv))
		698	gv_efullname3 (fullname, gv, 0);
		699
		700	bot = PL_stack_base + cx->blk_oldsp + 1;
		701	top = cx->blk_gimme == G_ARRAY ? SP + 1
		702	: cx->blk_gimme == G_SCALAR ? bot + 1
		703	: bot;
		704
		705	while (bot < top)
		706	av_push (av, SvREFCNT_inc (*bot++));
		707
		708	PL_runops = RUNOPS_DEFAULT;
		709	ENTER;
		710	SAVETMPS;
		711	EXTEND (SP, 3);
		712	PUSHMARK (SP);
		713	PUSHs (&PL_sv_no);
		714	PUSHs (fullname);
		715	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		716	PUTBACK;
		717	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		718	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		719	SPAGAIN;
		720	FREETMPS;
		721	LEAVE;
		722	PL_runops = runops_trace;
		723	}
		724
		725	if (oldcop != PL_curcop)
		726	{
		727	oldcop = PL_curcop;
		728
		729	if (PL_curcop != &PL_compiling)
		730	{
		731	SV **cb;
		732
		733	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		734	{
		735	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		736
		737	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		738	{
		739	runops_proc_t old_runops = PL_runops;
		740	dSP;
		741	GV *gv = CvGV (cx->blk_sub.cv);
		742	SV *fullname = sv_2mortal (newSV (0));
		743
		744	if (isGV (gv))
		745	gv_efullname3 (fullname, gv, 0);
		746
		747	PL_runops = RUNOPS_DEFAULT;
		748	ENTER;
		749	SAVETMPS;
		750	EXTEND (SP, 3);
		751	PUSHMARK (SP);
		752	PUSHs (&PL_sv_yes);
		753	PUSHs (fullname);
		754	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		755	PUTBACK;
		756	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		757	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		758	SPAGAIN;
		759	FREETMPS;
		760	LEAVE;
		761	PL_runops = runops_trace;
		762	}
		763
		764	oldcxix = cxstack_ix;
		765	}
		766
		767	if (cctx->flags & CC_TRACE_LINE)
		768	{
		769	dSP;
		770
		771	PL_runops = RUNOPS_DEFAULT;
		772	ENTER;
		773	SAVETMPS;
		774	EXTEND (SP, 3);
		775	PL_runops = RUNOPS_DEFAULT;
		776	PUSHMARK (SP);
		777	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		778	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		779	PUTBACK;
		780	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		781	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		782	SPAGAIN;
		783	FREETMPS;
		784	LEAVE;
		785	PL_runops = runops_trace;
		786	}
		787	}
		788	}
		789	}
		790	}
		791
		792	TAINT_NOT;
		793	return 0;
		794	}
		795
		796	/* inject a fake call to Coro::State::_cctx_init into the execution */
		797	/* _cctx_init should be careful, as it could be called at almost any time */
		798	/* during execution of a perl program */
527	static void NOINLINE	799	static void NOINLINE
528	prepare_cctx (coro_cctx *cctx)	800	prepare_cctx (pTHX_ coro_cctx *cctx)
529	{	801	{
530	dSP;	802	dSP;
531	LOGOP myop;	803	LOGOP myop;
532		804
		805	PL_top_env = &PL_start_env;
		806
		807	if (cctx->flags & CC_TRACE)
		808	PL_runops = runops_trace;
		809
533	Zero (&myop, 1, LOGOP);	810	Zero (&myop, 1, LOGOP);
534	myop.op_next = PL_op;	811	myop.op_next = PL_op;
535	myop.op_flags = OPf_WANT_VOID;	812	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
536
537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538		813
539	PUSHMARK (SP);	814	PUSHMARK (SP);
		815	EXTEND (SP, 2);
		816	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	817	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541	PUTBACK;	818	PUTBACK;
		819	PL_op = (OP *)&myop;
542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	820	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543	SPAGAIN;	821	SPAGAIN;
544	}	822	}
545		823
		824	/*
		825	* this is a _very_ stripped down perl interpreter ;)
		826	*/
546	static void	827	static void
547	coro_run (void *arg)	828	coro_run (void *arg)
548	{	829	{
		830	dTHX;
		831
549	/* coro_run is the alternative epilogue of transfer() */	832	/* coro_run is the alternative tail of transfer(), so unlock here. */
550	UNLOCK;	833	UNLOCK;
551		834
		835	/* we now skip the entersub that lead to transfer() */
		836	PL_op = PL_op->op_next;
		837
		838	/* inject a fake subroutine call to cctx_init */
		839	prepare_cctx (aTHX_ (coro_cctx *)arg);
		840
		841	/* somebody or something will hit me for both perl_run and PL_restartop */
		842	PL_restartop = PL_op;
		843	perl_run (PL_curinterp);
		844
552	/*	845	/*
553	* this is a _very_ stripped down perl interpreter ;)	846	* If perl-run returns we assume exit() was being called or the coro
		847	* fell off the end, which seems to be the only valid (non-bug)
		848	* reason for perl_run to return. We try to exit by jumping to the
		849	* bootstrap-time "top" top_env, as we cannot restore the "main"
		850	* coroutine as Coro has no such concept
554	*/	851	*/
555	PL_top_env = &PL_start_env;	852	PL_top_env = main_top_env;
556		853	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
557	/* inject call to cctx_init */
558	prepare_cctx ((coro_cctx *)arg);
559
560	/* somebody will hit me for both perl_run and PL_restartop */
561	perl_run (PL_curinterp);
562
563	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
564	abort ();
565	}	854	}
566		855
567	static coro_cctx *	856	static coro_cctx *
568	cctx_new ()	857	cctx_new ()
569	{	858	{
570	coro_cctx *cctx;	859	coro_cctx *cctx;
		860	void *stack_start;
		861	size_t stack_size;
571		862
572	++cctx_count;	863	++cctx_count;
573		864
574	New (0, cctx, 1, coro_cctx);	865	Newz (0, cctx, 1, coro_cctx);
575		866
576	#if HAVE_MMAP	867	#if HAVE_MMAP
577		868
578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	869	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579	/* mmap suppsedly does allocate-on-write for us */	870	/* mmap supposedly does allocate-on-write for us */
580	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	871	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
581		872
582	if (cctx->sptr == (void *)-1)	873	if (cctx->sptr != (void *)-1)
583	{
584	perror ("FATAL: unable to mmap stack for coroutine");
585	_exit (EXIT_FAILURE);
586	}	874	{
587
588	# if STACKGUARD	875	# if CORO_STACKGUARD
589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	876	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
590	# endif	877	# endif
		878	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		879	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		880	cctx->flags |= CC_MAPPED;
		881	}
		882	else
		883	#endif
		884	{
		885	cctx->ssize = coro_stacksize * (long)sizeof (long);
		886	New (0, cctx->sptr, coro_stacksize, long);
591		887
592	#else
593
594	cctx->ssize = STACKSIZE * (long)sizeof (long);
595	New (0, cctx->sptr, STACKSIZE, long);
596
597	if (!cctx->sptr)	888	if (!cctx->sptr)
598	{	889	{
599	perror ("FATAL: unable to malloc stack for coroutine");	890	perror ("FATAL: unable to allocate stack for coroutine");
600	_exit (EXIT_FAILURE);	891	_exit (EXIT_FAILURE);
601	}	892	}
602		893
603	#endif	894	stack_start = cctx->sptr;
		895	stack_size = cctx->ssize;
		896	}
604		897
605	#if USE_VALGRIND	898	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
606	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
607	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
608	cctx->ssize + (char *)cctx->sptr
609	);
610	#endif
611
612	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	899	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
613		900
614	return cctx;	901	return cctx;
615	}	902	}
616		903
617	static void	904	static void
618	cctx_free (coro_cctx *cctx)	905	cctx_destroy (coro_cctx *cctx)
619	{	906	{
620	if (!cctx)	907	if (!cctx)
621	return;	908	return;
622		909
623	--cctx_count;	910	--cctx_count;
624		911
625	#if USE_VALGRIND	912	#if CORO_USE_VALGRIND
626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	913	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627	#endif	914	#endif
628		915
629	#if HAVE_MMAP	916	#if HAVE_MMAP
		917	if (cctx->flags & CC_MAPPED)
630	munmap (cctx->sptr, cctx->ssize);	918	munmap (cctx->sptr, cctx->ssize);
631	#else	919	else
		920	#endif
632	Safefree (cctx->sptr);	921	Safefree (cctx->sptr);
633	#endif
634		922
635	Safefree (cctx);	923	Safefree (cctx);
636	}	924	}
637		925
638	static coro_cctx *	926	static coro_cctx *
639	cctx_get ()	927	cctx_get (pTHX)
640	{	928	{
641	coro_cctx *cctx;
642
643	if (cctx_first)	929	while (cctx_first)
644	{	930	{
		931	coro_cctx *cctx = cctx_first;
		932	cctx_first = cctx->next;
645	--cctx_idle;	933	--cctx_idle;
646	cctx = cctx_first;	934
647	cctx_first = cctx->next;	935	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
648	}	936	return cctx;
649	else	937
650	{	938	cctx_destroy (cctx);
651	cctx = cctx_new ();
652	PL_op = PL_op->op_next;
653	}	939	}
654		940
655	return cctx;	941	return cctx_new ();
656	}	942	}
657		943
658	static void	944	static void
659	cctx_put (coro_cctx *cctx)	945	cctx_put (coro_cctx *cctx)
660	{	946	{
		947	/* free another cctx if overlimit */
		948	if (cctx_idle >= MAX_IDLE_CCTX)
		949	{
		950	coro_cctx *first = cctx_first;
		951	cctx_first = first->next;
		952	--cctx_idle;
		953
		954	cctx_destroy (first);
		955	}
		956
661	++cctx_idle;	957	++cctx_idle;
662	cctx->next = cctx_first;	958	cctx->next = cctx_first;
663	cctx_first = cctx;	959	cctx_first = cctx;
664	}	960	}
665		961
666	/* never call directly, always through the coro_state_transfer global variable */	962	/** coroutine switching *****************************************************/
		963
667	static void NOINLINE	964	static void NOINLINE
		965	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		966	{
		967	if (prev != next)
		968	{
		969	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		970	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		971
		972	if (next->flags & CF_RUNNING)
		973	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		974
		975	if (next->flags & CF_DESTROYED)
		976	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		977
		978	if (PL_lex_state != LEX_NOTPARSING)
		979	croak ("Coro::State::transfer called while parsing, but this is not supported");
		980	}
		981	}
		982
		983	/* always use the TRANSFER macro */
		984	static void NOINLINE
668	transfer (struct coro *prev, struct coro *next, int flags)	985	transfer (pTHX_ struct coro *prev, struct coro *next)
669	{	986	{
670	dSTACKLEVEL;	987	dSTACKLEVEL;
671		988
672	/* sometimes transfer is only called to set idle_sp */	989	/* sometimes transfer is only called to set idle_sp */
673	if (flags == TRANSFER_SET_STACKLEVEL)	990	if (!next)
		991	{
674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	992	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		993	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		994	}
675	else if (prev != next)	995	else if (prev != next)
676	{	996	{
677	coro_cctx *prev__cctx;	997	coro_cctx *prev__cctx;
678		998
679	if (!prev->cctx)	999	if (prev->flags & CF_NEW)
680	{	1000	{
681	/* create a new empty context */	1001	/* create a new empty context */
682	Newz (0, prev->cctx, 1, coro_cctx);	1002	Newz (0, prev->cctx, 1, coro_cctx);
683	prev->cctx->inuse = 1;	1003	prev->flags &= ~CF_NEW;
684	prev->flags |= CF_RUNNING;	1004	prev->flags |= CF_RUNNING;
685	}	1005	}
686
687	if (!prev->flags & CF_RUNNING)
688	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
689
690	if (next->flags & CF_RUNNING)
691	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
692		1006
693	prev->flags &= ~CF_RUNNING;	1007	prev->flags &= ~CF_RUNNING;
694	next->flags |= CF_RUNNING;	1008	next->flags |= CF_RUNNING;
695		1009
696	LOCK;	1010	LOCK;
697		1011
698	if (next->mainstack)	1012	if (next->flags & CF_NEW)
699	{	1013	{
700	/* coroutine already started */	1014	/* need to start coroutine */
701	SAVE (prev, flags);	1015	next->flags &= ~CF_NEW;
702	LOAD (next);	1016	/* first get rid of the old state */
		1017	save_perl (aTHX_ prev);
		1018	/* setup coroutine call */
		1019	coro_setup (aTHX_ next);
703	}	1020	}
704	else	1021	else
705	{	1022	{
706	/* need to start coroutine */	1023	/* coroutine already started */
707	/* first get rid of the old state */	1024	save_perl (aTHX_ prev);
708	SAVE (prev, -1);	1025	load_perl (aTHX_ next);
709	/* setup coroutine call */
710	setup_coro (next);
711	/* need a new stack */
712	assert (!next->stack);
713	}	1026	}
714		1027
715	prev__cctx = prev->cctx;	1028	prev__cctx = prev->cctx;
716		1029
717	/* possibly "free" the cctx */	1030	/* possibly "free" the cctx */
718	if (prev__cctx->idle_sp == STACKLEVEL)	1031	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
719	{	1032	{
720	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1033	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
721	assert (PL_top_env == prev__cctx->top_env);	1034	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1035
		1036	prev->cctx = 0;
722		1037
723	cctx_put (prev__cctx);	1038	cctx_put (prev__cctx);
724	prev->cctx = 0;
725	}	1039	}
726		1040
		1041	++next->usecount;
		1042
727	if (!next->cctx)	1043	if (!next->cctx)
728	next->cctx = cctx_get ();	1044	next->cctx = cctx_get (aTHX);
729		1045
730	if (prev__cctx != next->cctx)	1046	if (prev__cctx != next->cctx)
731	{	1047	{
732	assert ( prev__cctx->inuse);
733	assert (!next->cctx->inuse);
734
735	prev__cctx->inuse = 0;
736	next->cctx->inuse = 1;
737
738	prev__cctx->top_env = PL_top_env;	1048	prev__cctx->top_env = PL_top_env;
739	PL_top_env = next->cctx->top_env;	1049	PL_top_env = next->cctx->top_env;
740	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1050	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
741	}	1051	}
742		1052
743	free_coro_mortal ();	1053	free_coro_mortal (aTHX);
744
745	UNLOCK;	1054	UNLOCK;
746	}	1055	}
747	}	1056	}
748		1057
749	struct transfer_args	1058	struct transfer_args
750	{	1059	{
751	struct coro *prev, *next;	1060	struct coro *prev, *next;
752	int flags;
753	};	1061	};
754		1062
755	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1063	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1064	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
756		1065
		1066	/** high level stuff ********************************************************/
		1067
757	static void	1068	static int
758	coro_state_destroy (struct coro *coro)	1069	coro_state_destroy (pTHX_ struct coro *coro)
759	{	1070	{
760	if (coro->refcnt--)	1071	if (coro->flags & CF_DESTROYED)
761	return;	1072	return 0;
762		1073
		1074	coro->flags |= CF_DESTROYED;
		1075
763	if (coro->flags & CF_RUNNING)	1076	if (coro->flags & CF_READY)
764	croak ("FATAL: tried to destroy currently running coroutine");	1077	{
		1078	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1079	/* alternative: look through all ready queues and remove the coro */
		1080	LOCK;
		1081	--coro_nready;
		1082	UNLOCK;
		1083	}
		1084	else
		1085	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
765		1086
766	if (coro->mainstack && coro->mainstack != main_mainstack)	1087	if (coro->mainstack && coro->mainstack != main_mainstack)
767	{	1088	{
768	struct coro temp;	1089	struct coro temp;
769		1090
770	SAVE ((&temp), TRANSFER_SAVE_ALL);	1091	if (coro->flags & CF_RUNNING)
771	LOAD (coro);	1092	croak ("FATAL: tried to destroy currently running coroutine");
772		1093
773	coro_destroy_stacks ();	1094	save_perl (aTHX_ &temp);
		1095	load_perl (aTHX_ coro);
774		1096
		1097	coro_destroy (aTHX_ coro);
		1098
775	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1099	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
776		1100
777	coro->mainstack = 0;	1101	coro->mainstack = 0;
778	}	1102	}
779		1103
780	cctx_free (coro->cctx);	1104	cctx_destroy (coro->cctx);
781	SvREFCNT_dec (coro->args);	1105	SvREFCNT_dec (coro->args);
782	Safefree (coro);	1106
		1107	if (coro->next) coro->next->prev = coro->prev;
		1108	if (coro->prev) coro->prev->next = coro->next;
		1109	if (coro == coro_first) coro_first = coro->next;
		1110
		1111	return 1;
783	}	1112	}
784		1113
785	static int	1114	static int
786	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1115	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
787	{	1116	{
788	struct coro *coro = (struct coro *)mg->mg_ptr;	1117	struct coro *coro = (struct coro *)mg->mg_ptr;
789	mg->mg_ptr = 0;	1118	mg->mg_ptr = 0;
790		1119
		1120	coro->hv = 0;
		1121
		1122	if (--coro->refcnt < 0)
		1123	{
791	coro_state_destroy (coro);	1124	coro_state_destroy (aTHX_ coro);
		1125	Safefree (coro);
		1126	}
792		1127
793	return 0;	1128	return 0;
794	}	1129	}
795		1130
796	static int	1131	static int
…		…
803	return 0;	1138	return 0;
804	}	1139	}
805		1140
806	static MGVTBL coro_state_vtbl = {	1141	static MGVTBL coro_state_vtbl = {
807	0, 0, 0, 0,	1142	0, 0, 0, 0,
808	coro_state_clear,	1143	coro_state_free,
809	0,	1144	0,
810	#ifdef MGf_DUP	1145	#ifdef MGf_DUP
811	coro_state_dup,	1146	coro_state_dup,
812	#else	1147	#else
813	# define MGf_DUP 0	1148	# define MGf_DUP 0
814	#endif	1149	#endif
815	};	1150	};
816		1151
817	static struct coro *
818	SvSTATE (SV *coro)
819	{
820	HV *stash;
821	MAGIC *mg;
822
823	if (SvROK (coro))
824	coro = SvRV (coro);
825
826	stash = SvSTASH (coro);
827	if (stash != coro_stash && stash != coro_state_stash)
828	{
829	/* very slow, but rare, check */
830	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
831	croak ("Coro::State object required");
832	}
833
834	mg = SvMAGIC (coro);
835	assert (mg->mg_type == PERL_MAGIC_ext);
836	return (struct coro *)mg->mg_ptr;
837	}
838
839	static void	1152	static void
840	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1153	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
841	{	1154	{
842	ta->prev = SvSTATE (prev);	1155	ta->prev = SvSTATE (prev_sv);
843	ta->next = SvSTATE (next);	1156	ta->next = SvSTATE (next_sv);
844	ta->flags = flags;	1157	TRANSFER_CHECK (*ta);
845	}	1158	}
846		1159
847	static void	1160	static void
848	api_transfer (SV *prev, SV *next, int flags)	1161	api_transfer (SV *prev_sv, SV *next_sv)
849	{	1162	{
850	dTHX;	1163	dTHX;
851	struct transfer_args ta;	1164	struct transfer_args ta;
852		1165
853	prepare_transfer (&ta, prev, next, flags);	1166	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
854	TRANSFER (ta);	1167	TRANSFER (ta);
855	}	1168	}
856		1169
857	/** Coro ********************************************************************/	1170	/** Coro ********************************************************************/
858		1171
859	#define PRIO_MAX 3
860	#define PRIO_HIGH 1
861	#define PRIO_NORMAL 0
862	#define PRIO_LOW -1
863	#define PRIO_IDLE -3
864	#define PRIO_MIN -4
865
866	/* for Coro.pm */
867	static GV *coro_current, *coro_idle;
868	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
869	static int coro_nready;
870
871	static void	1172	static void
872	coro_enq (SV *coro_sv)	1173	coro_enq (pTHX_ SV *coro_sv)
873	{	1174	{
874	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1175	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
875	coro_nready++;
876	}	1176	}
877		1177
878	static SV *	1178	static SV *
879	coro_deq (int min_prio)	1179	coro_deq (pTHX_ int min_prio)
880	{	1180	{
881	int prio = PRIO_MAX - PRIO_MIN;	1181	int prio = PRIO_MAX - PRIO_MIN;
882		1182
883	min_prio -= PRIO_MIN;	1183	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	1184	if (min_prio < 0)
885	min_prio = 0;	1185	min_prio = 0;
886		1186
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1187	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (AvFILLp (coro_ready [prio]) >= 0)	1188	if (AvFILLp (coro_ready [prio]) >= 0)
889	{
890	coro_nready--;
891	return av_shift (coro_ready [prio]);	1189	return av_shift (coro_ready [prio]);
892	}
893		1190
894	return 0;	1191	return 0;
895	}	1192	}
896		1193
897	static int	1194	static int
898	api_ready (SV *coro_sv)	1195	api_ready (SV *coro_sv)
899	{	1196	{
		1197	dTHX;
900	struct coro *coro;	1198	struct coro *coro;
901		1199
902	if (SvROK (coro_sv))	1200	if (SvROK (coro_sv))
903	coro_sv = SvRV (coro_sv);	1201	coro_sv = SvRV (coro_sv);
904		1202
905	coro = SvSTATE (coro_sv);	1203	coro = SvSTATE (coro_sv);
906		1204
907	if (coro->flags & CF_READY)	1205	if (coro->flags & CF_READY)
908	return 0;	1206	return 0;
909		1207
910	if (coro->flags & CF_RUNNING)
911	croak ("Coro::ready called on currently running coroutine");
912
913	coro->flags |= CF_READY;	1208	coro->flags |= CF_READY;
914		1209
915	LOCK;	1210	LOCK;
916	coro_enq (SvREFCNT_inc (coro_sv));	1211	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1212	++coro_nready;
917	UNLOCK;	1213	UNLOCK;
918		1214
919	return 1;	1215	return 1;
920	}	1216	}
921		1217
922	static int	1218	static int
923	api_is_ready (SV *coro_sv)	1219	api_is_ready (SV *coro_sv)
924	{	1220	{
		1221	dTHX;
925	return !!SvSTATE (coro_sv)->flags & CF_READY;	1222	return !!(SvSTATE (coro_sv)->flags & CF_READY);
926	}	1223	}
927		1224
928	static void	1225	static void
929	prepare_schedule (struct transfer_args *ta)	1226	prepare_schedule (pTHX_ struct transfer_args *ta)
930	{	1227	{
931	SV *current, *prev, *next;	1228	SV *prev_sv, *next_sv;
932
933	current = GvSV (coro_current);
934		1229
935	for (;;)	1230	for (;;)
936	{	1231	{
937	LOCK;	1232	LOCK;
938	next = coro_deq (PRIO_MIN);	1233	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1234
		1235	/* nothing to schedule: call the idle handler */
		1236	if (!next_sv)
		1237	{
		1238	dSP;
		1239	UNLOCK;
		1240
		1241	ENTER;
		1242	SAVETMPS;
		1243
		1244	PUSHMARK (SP);
		1245	PUTBACK;
		1246	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1247
		1248	FREETMPS;
		1249	LEAVE;
		1250	continue;
		1251	}
		1252
		1253	ta->next = SvSTATE (next_sv);
		1254
		1255	/* cannot transfer to destroyed coros, skip and look for next */
		1256	if (ta->next->flags & CF_DESTROYED)
		1257	{
		1258	UNLOCK;
		1259	SvREFCNT_dec (next_sv);
		1260	/* coro_nready is already taken care of by destroy */
		1261	continue;
		1262	}
		1263
		1264	--coro_nready;
939	UNLOCK;	1265	UNLOCK;
940
941	if (next)
942	break;	1266	break;
943
944	{
945	dSP;
946
947	ENTER;
948	SAVETMPS;
949
950	PUSHMARK (SP);
951	PUTBACK;
952	call_sv (GvSV (coro_idle), G_DISCARD);
953
954	FREETMPS;
955	LEAVE;
956	}	1267	}
957	}
958
959	prev = SvRV (current);
960	SvRV (current) = next;
961		1268
962	/* free this only after the transfer */	1269	/* free this only after the transfer */
		1270	prev_sv = SvRV (coro_current);
		1271	ta->prev = SvSTATE (prev_sv);
		1272	TRANSFER_CHECK (*ta);
		1273	assert (ta->next->flags & CF_READY);
		1274	ta->next->flags &= ~CF_READY;
		1275	SvRV_set (coro_current, next_sv);
		1276
963	LOCK;	1277	LOCK;
964	free_coro_mortal ();	1278	free_coro_mortal (aTHX);
		1279	coro_mortal = prev_sv;
965	UNLOCK;	1280	UNLOCK;
966	coro_mortal = prev;
967
968	ta->prev = SvSTATE (prev);
969	ta->next = SvSTATE (next);
970	ta->flags = TRANSFER_SAVE_ALL;
971
972	ta->next->flags &= ~CF_READY;
973	}	1281	}
974		1282
975	static void	1283	static void
976	prepare_cede (struct transfer_args *ta)	1284	prepare_cede (pTHX_ struct transfer_args *ta)
977	{	1285	{
978	api_ready (GvSV (coro_current));	1286	api_ready (coro_current);
979
980	prepare_schedule (ta);	1287	prepare_schedule (aTHX_ ta);
		1288	}
		1289
		1290	static int
		1291	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1292	{
		1293	if (coro_nready)
		1294	{
		1295	SV *prev = SvRV (coro_current);
		1296	prepare_schedule (aTHX_ ta);
		1297	api_ready (prev);
		1298	return 1;
		1299	}
		1300	else
		1301	return 0;
981	}	1302	}
982		1303
983	static void	1304	static void
984	api_schedule (void)	1305	api_schedule (void)
985	{	1306	{
986	dTHX;	1307	dTHX;
987	struct transfer_args ta;	1308	struct transfer_args ta;
988		1309
989	prepare_schedule (&ta);	1310	prepare_schedule (aTHX_ &ta);
990	TRANSFER (ta);	1311	TRANSFER (ta);
991	}	1312	}
992		1313
993	static void	1314	static int
994	api_cede (void)	1315	api_cede (void)
995	{	1316	{
996	dTHX;	1317	dTHX;
997	struct transfer_args ta;	1318	struct transfer_args ta;
998		1319
999	prepare_cede (&ta);	1320	prepare_cede (aTHX_ &ta);
		1321
		1322	if (ta.prev != ta.next)
		1323	{
1000	TRANSFER (ta);	1324	TRANSFER (ta);
		1325	return 1;
		1326	}
		1327	else
		1328	return 0;
1001	}	1329	}
1002		1330
		1331	static int
		1332	api_cede_notself (void)
		1333	{
		1334	dTHX;
		1335	struct transfer_args ta;
		1336
		1337	if (prepare_cede_notself (aTHX_ &ta))
		1338	{
		1339	TRANSFER (ta);
		1340	return 1;
		1341	}
		1342	else
		1343	return 0;
		1344	}
		1345
		1346	static void
		1347	api_trace (SV *coro_sv, int flags)
		1348	{
		1349	dTHX;
		1350	struct coro *coro = SvSTATE (coro_sv);
		1351
		1352	if (flags & CC_TRACE)
		1353	{
		1354	if (!coro->cctx)
		1355	coro->cctx = cctx_new ();
		1356	else if (!(coro->cctx->flags & CC_TRACE))
		1357	croak ("cannot enable tracing on coroutine with custom stack");
		1358
		1359	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1360	}
		1361	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1362	{
		1363	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1364
		1365	if (coro->flags & CF_RUNNING)
		1366	PL_runops = RUNOPS_DEFAULT;
		1367	else
		1368	coro->runops = RUNOPS_DEFAULT;
		1369	}
		1370	}
		1371
1003	MODULE = Coro::State PACKAGE = Coro::State	1372	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1004		1373
1005	PROTOTYPES: DISABLE	1374	PROTOTYPES: DISABLE
1006		1375
1007	BOOT:	1376	BOOT:
1008	{	1377	{
1009	#ifdef USE_ITHREADS	1378	#ifdef USE_ITHREADS
1010	MUTEX_INIT (&coro_mutex);	1379	MUTEX_INIT (&coro_mutex);
1011	#endif	1380	#endif
1012	BOOT_PAGESIZE;	1381	BOOT_PAGESIZE;
1013		1382
		1383	irsgv = gv_fetchpv ("/" , GV_ADD, SVt_PV);
		1384	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD, SVt_PVIO);
		1385
1014	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1386	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1015		1387
1016	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1388	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1017	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1389	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1018	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1390	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1391	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1019		1392
1020	main_mainstack = PL_mainstack;	1393	main_mainstack = PL_mainstack;
		1394	main_top_env = PL_top_env;
		1395
		1396	while (main_top_env->je_prev)
		1397	main_top_env = main_top_env->je_prev;
1021		1398
1022	coroapi.ver = CORO_API_VERSION;	1399	coroapi.ver = CORO_API_VERSION;
1023	coroapi.transfer = api_transfer;	1400	coroapi.transfer = api_transfer;
1024		1401
1025	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1402	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1032	struct coro *coro;	1409	struct coro *coro;
1033	HV *hv;	1410	HV *hv;
1034	int i;	1411	int i;
1035		1412
1036	Newz (0, coro, 1, struct coro);	1413	Newz (0, coro, 1, struct coro);
1037	coro->args = newAV ();	1414	coro->args = newAV ();
		1415	coro->flags = CF_NEW;
1038		1416
		1417	if (coro_first) coro_first->prev = coro;
		1418	coro->next = coro_first;
		1419	coro_first = coro;
		1420
1039	hv = newHV ();	1421	coro->hv = hv = newHV ();
1040	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1422	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1041	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1423	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1042		1424
1043	for (i = 1; i < items; i++)	1425	for (i = 1; i < items; i++)
1044	av_push (coro->args, newSVsv (ST (i)));	1426	av_push (coro->args, newSVsv (ST (i)));
1045	}	1427	}
1046	OUTPUT:	1428	OUTPUT:
1047	RETVAL	1429	RETVAL
1048		1430
		1431	# these not obviously related functions are all rolled into the same xs
		1432	# function to increase chances that they all will call transfer with the same
		1433	# stack offset
1049	void	1434	void
1050	_set_stacklevel (...)	1435	_set_stacklevel (...)
1051	ALIAS:	1436	ALIAS:
1052	Coro::State::transfer = 1	1437	Coro::State::transfer = 1
1053	Coro::schedule = 2	1438	Coro::schedule = 2
1054	Coro::cede = 3	1439	Coro::cede = 3
1055	Coro::Cont::yield = 4	1440	Coro::cede_notself = 4
1056	CODE:	1441	CODE:
1057	{	1442	{
1058	struct transfer_args ta;	1443	struct transfer_args ta;
1059		1444
1060	switch (ix)	1445	switch (ix)
1061	{	1446	{
1062	case 0:	1447	case 0:
1063	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1448	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1064	ta.next = 0;	1449	ta.next = 0;
1065	ta.flags = TRANSFER_SET_STACKLEVEL;
1066	break;	1450	break;
1067		1451
1068	case 1:	1452	case 1:
1069	if (items != 3)	1453	if (items != 2)
1070	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1454	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1071		1455
1072	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1456	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1073	break;	1457	break;
1074		1458
1075	case 2:	1459	case 2:
1076	prepare_schedule (&ta);	1460	prepare_schedule (aTHX_ &ta);
1077	break;	1461	break;
1078		1462
1079	case 3:	1463	case 3:
1080	prepare_cede (&ta);	1464	prepare_cede (aTHX_ &ta);
1081	break;	1465	break;
1082		1466
1083	case 4:	1467	case 4:
1084	{	1468	if (!prepare_cede_notself (aTHX_ &ta))
1085	SV *yieldstack;	1469	XSRETURN_EMPTY;
1086	SV *sv;
1087	AV *defav = GvAV (PL_defgv);
1088		1470
1089	yieldstack = *hv_fetch (
1090	(HV *)SvRV (GvSV (coro_current)),
1091	"yieldstack", sizeof ("yieldstack") - 1,
1092	0
1093	);
1094
1095	/* set up @_ -- ugly */
1096	av_clear (defav);
1097	av_fill (defav, items - 1);
1098	while (items--)
1099	av_store (defav, items, SvREFCNT_inc (ST(items)));
1100
1101	sv = av_pop ((AV *)SvRV (yieldstack));
1102	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1103	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1104	ta.flags = 0;
1105	SvREFCNT_dec (sv);
1106	}
1107	break;	1471	break;
1108
1109	}	1472	}
1110		1473
		1474	BARRIER;
1111	TRANSFER (ta);	1475	TRANSFER (ta);
1112	}
1113		1476
1114	void	1477	if (GIMME_V != G_VOID && ta.next != ta.prev)
1115	_clone_state_from (SV *dst, SV *src)	1478	XSRETURN_YES;
		1479	}
		1480
		1481	bool
		1482	_destroy (SV *coro_sv)
1116	CODE:	1483	CODE:
1117	{	1484	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1118	struct coro *coro_src = SvSTATE (src);	1485	OUTPUT:
1119		1486	RETVAL
1120	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1121
1122	++coro_src->refcnt;
1123	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1124	}
1125		1487
1126	void	1488	void
1127	_exit (code)	1489	_exit (code)
1128	int code	1490	int code
1129	PROTOTYPE: $	1491	PROTOTYPE: $
1130	CODE:	1492	CODE:
1131	_exit (code);	1493	_exit (code);
1132		1494
1133	int	1495	int
		1496	cctx_stacksize (int new_stacksize = 0)
		1497	CODE:
		1498	RETVAL = coro_stacksize;
		1499	if (new_stacksize)
		1500	coro_stacksize = new_stacksize;
		1501	OUTPUT:
		1502	RETVAL
		1503
		1504	int
1134	cctx_count ()	1505	cctx_count ()
1135	CODE:	1506	CODE:
1136	RETVAL = cctx_count;	1507	RETVAL = cctx_count;
1137	OUTPUT:	1508	OUTPUT:
1138	RETVAL	1509	RETVAL
…		…
1142	CODE:	1513	CODE:
1143	RETVAL = cctx_idle;	1514	RETVAL = cctx_idle;
1144	OUTPUT:	1515	OUTPUT:
1145	RETVAL	1516	RETVAL
1146		1517
		1518	void
		1519	list ()
		1520	PPCODE:
		1521	{
		1522	struct coro *coro;
		1523	for (coro = coro_first; coro; coro = coro->next)
		1524	if (coro->hv)
		1525	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1526	}
		1527
		1528	void
		1529	call (Coro::State coro, SV *coderef)
		1530	ALIAS:
		1531	eval = 1
		1532	CODE:
		1533	{
		1534	if (coro->mainstack)
		1535	{
		1536	struct coro temp;
		1537	Zero (&temp, 1, struct coro);
		1538
		1539	if (!(coro->flags & CF_RUNNING))
		1540	{
		1541	save_perl (aTHX_ &temp);
		1542	load_perl (aTHX_ coro);
		1543	}
		1544
		1545	{
		1546	dSP;
		1547	ENTER;
		1548	SAVETMPS;
		1549	PUSHMARK (SP);
		1550	PUTBACK;
		1551	if (ix)
		1552	eval_sv (coderef, 0);
		1553	else
		1554	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1555	SPAGAIN;
		1556	FREETMPS;
		1557	LEAVE;
		1558	PUTBACK;
		1559	}
		1560
		1561	if (!(coro->flags & CF_RUNNING))
		1562	{
		1563	save_perl (aTHX_ coro);
		1564	load_perl (aTHX_ &temp);
		1565	}
		1566	}
		1567	}
		1568
		1569	SV *
		1570	is_ready (Coro::State coro)
		1571	PROTOTYPE: $
		1572	ALIAS:
		1573	is_ready = CF_READY
		1574	is_running = CF_RUNNING
		1575	is_new = CF_NEW
		1576	is_destroyed = CF_DESTROYED
		1577	CODE:
		1578	RETVAL = boolSV (coro->flags & ix);
		1579	OUTPUT:
		1580	RETVAL
		1581
		1582	void
		1583	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1584
		1585	SV *
		1586	has_stack (Coro::State coro)
		1587	PROTOTYPE: $
		1588	CODE:
		1589	RETVAL = boolSV (!!coro->cctx);
		1590	OUTPUT:
		1591	RETVAL
		1592
		1593	int
		1594	is_traced (Coro::State coro)
		1595	PROTOTYPE: $
		1596	CODE:
		1597	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1598	OUTPUT:
		1599	RETVAL
		1600
		1601	IV
		1602	rss (Coro::State coro)
		1603	PROTOTYPE: $
		1604	ALIAS:
		1605	usecount = 1
		1606	CODE:
		1607	switch (ix)
		1608	{
		1609	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1610	case 1: RETVAL = coro->usecount; break;
		1611	}
		1612	OUTPUT:
		1613	RETVAL
		1614
		1615
1147	MODULE = Coro::State PACKAGE = Coro	1616	MODULE = Coro::State PACKAGE = Coro
1148		1617
1149	BOOT:	1618	BOOT:
1150	{	1619	{
1151	int i;	1620	int i;
		1621
		1622	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1623	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1624	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1625
		1626	coro_current = get_sv ("Coro::current", FALSE);
		1627	SvREADONLY_on (coro_current);
1152		1628
1153	coro_stash = gv_stashpv ("Coro", TRUE);	1629	coro_stash = gv_stashpv ("Coro", TRUE);
1154		1630
1155	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1631	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1156	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1632	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1157	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1633	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1158	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1634	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1159	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1635	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1160	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1636	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1161		1637
1162	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1163	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1164
1165	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1638	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1166	coro_ready[i] = newAV ();	1639	coro_ready[i] = newAV ();
1167		1640
1168	{	1641	{
1169	SV *sv = perl_get_sv("Coro::API", 1);	1642	SV *sv = perl_get_sv("Coro::API", 1);
1170		1643
1171	coroapi.schedule = api_schedule;	1644	coroapi.schedule = api_schedule;
1172	coroapi.cede = api_cede;	1645	coroapi.cede = api_cede;
		1646	coroapi.cede_notself = api_cede_notself;
1173	coroapi.ready = api_ready;	1647	coroapi.ready = api_ready;
1174	coroapi.is_ready = api_is_ready;	1648	coroapi.is_ready = api_is_ready;
1175	coroapi.nready = &coro_nready;	1649	coroapi.nready = &coro_nready;
1176	coroapi.current = coro_current;	1650	coroapi.current = coro_current;
1177		1651
1178	GCoroAPI = &coroapi;	1652	GCoroAPI = &coroapi;
1179	sv_setiv (sv, (IV)&coroapi);	1653	sv_setiv (sv, (IV)&coroapi);
1180	SvREADONLY_on (sv);	1654	SvREADONLY_on (sv);
1181	}	1655	}
1182	}	1656	}
		1657
		1658	void
		1659	_set_current (SV *current)
		1660	PROTOTYPE: $
		1661	CODE:
		1662	SvREFCNT_dec (SvRV (coro_current));
		1663	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1183		1664
1184	int	1665	int
1185	prio (Coro::State coro, int newprio = 0)	1666	prio (Coro::State coro, int newprio = 0)
1186	ALIAS:	1667	ALIAS:
1187	nice = 1	1668	nice = 1
…		…
1190	RETVAL = coro->prio;	1671	RETVAL = coro->prio;
1191		1672
1192	if (items > 1)	1673	if (items > 1)
1193	{	1674	{
1194	if (ix)	1675	if (ix)
1195	newprio += coro->prio;	1676	newprio = coro->prio - newprio;
1196		1677
1197	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1678	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1198	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1679	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1199		1680
1200	coro->prio = newprio;	1681	coro->prio = newprio;
1201	}	1682	}
1202	}	1683	}
		1684	OUTPUT:
		1685	RETVAL
1203		1686
1204	SV *	1687	SV *
1205	ready (SV *self)	1688	ready (SV *self)
1206	PROTOTYPE: $	1689	PROTOTYPE: $
1207	CODE:	1690	CODE:
1208	RETVAL = boolSV (api_ready (self));	1691	RETVAL = boolSV (api_ready (self));
1209	OUTPUT:	1692	OUTPUT:
1210	RETVAL	1693	RETVAL
1211		1694
1212	SV *
1213	is_ready (SV *self)
1214	PROTOTYPE: $
1215	CODE:
1216	RETVAL = boolSV (api_is_ready (self));
1217	OUTPUT:
1218	RETVAL
1219
1220	int	1695	int
1221	nready (...)	1696	nready (...)
1222	PROTOTYPE:	1697	PROTOTYPE:
1223	CODE:	1698	CODE:
1224	RETVAL = coro_nready;	1699	RETVAL = coro_nready;
1225	OUTPUT:	1700	OUTPUT:
1226	RETVAL	1701	RETVAL
1227		1702
		1703	# for async_pool speedup
		1704	void
		1705	_pool_1 (SV *cb)
		1706	CODE:
		1707	{
		1708	struct coro *coro = SvSTATE (coro_current);
		1709	HV *hv = (HV *)SvRV (coro_current);
		1710	AV *defav = GvAV (PL_defgv);
		1711	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1712	AV *invoke_av;
		1713	int i, len;
		1714
		1715	if (!invoke)
		1716	croak ("\3terminate\2\n");
		1717
		1718	SvREFCNT_dec (coro->saved_deffh);
		1719	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1720
		1721	hv_store (hv, "desc", sizeof ("desc") - 1,
		1722	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1723
		1724	invoke_av = (AV *)SvRV (invoke);
		1725	len = av_len (invoke_av);
		1726
		1727	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1728
		1729	if (len > 0)
		1730	{
		1731	av_fill (defav, len - 1);
		1732	for (i = 0; i < len; ++i)
		1733	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1734	}
		1735
		1736	SvREFCNT_dec (invoke);
		1737	}
		1738
		1739	void
		1740	_pool_2 (SV *cb)
		1741	CODE:
		1742	{
		1743	struct coro *coro = SvSTATE (coro_current);
		1744
		1745	sv_setsv (cb, &PL_sv_undef);
		1746
		1747	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1748	coro->saved_deffh = 0;
		1749
		1750	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1751	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1752	croak ("\3terminate\2\n");
		1753
		1754	av_clear (GvAV (PL_defgv));
		1755	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1756	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1757
		1758	coro->prio = 0;
		1759
		1760	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1761	api_trace (coro_current, 0);
		1762
		1763	av_push (av_async_pool, newSVsv (coro_current));
		1764	}
		1765
		1766
1228	MODULE = Coro::State PACKAGE = Coro::AIO	1767	MODULE = Coro::State PACKAGE = Coro::AIO
1229		1768
1230	SV *	1769	SV *
1231	_get_state ()	1770	_get_state ()
1232	CODE:	1771	CODE:
1233	{	1772	{
1234	struct {	1773	struct io_state *data;
1235	int errorno;
1236	int laststype;
1237	int laststatval;
1238	Stat_t statcache;
1239	} data;
1240		1774
		1775	RETVAL = newSV (sizeof (struct io_state));
		1776	data = (struct io_state *)SvPVX (RETVAL);
		1777	SvCUR_set (RETVAL, sizeof (struct io_state));
		1778	SvPOK_only (RETVAL);
		1779
1241	data.errorno = errno;	1780	data->errorno = errno;
1242	data.laststype = PL_laststype;	1781	data->laststype = PL_laststype;
1243	data.laststatval = PL_laststatval;	1782	data->laststatval = PL_laststatval;
1244	data.statcache = PL_statcache;	1783	data->statcache = PL_statcache;
1245
1246	RETVAL = newSVpvn ((char *)&data, sizeof data);
1247	}	1784	}
1248	OUTPUT:	1785	OUTPUT:
1249	RETVAL	1786	RETVAL
1250		1787
1251	void	1788	void
1252	_set_state (char *data_)	1789	_set_state (char *data_)
1253	PROTOTYPE: $	1790	PROTOTYPE: $
1254	CODE:	1791	CODE:
1255	{	1792	{
1256	struct {	1793	struct io_state *data = (void *)data_;
1257	int errorno;
1258	int laststype;
1259	int laststatval;
1260	Stat_t statcache;
1261	} *data = (void *)data_;
1262		1794
1263	errno = data->errorno;	1795	errno = data->errorno;
1264	PL_laststype = data->laststype;	1796	PL_laststype = data->laststype;
1265	PL_laststatval = data->laststatval;	1797	PL_laststatval = data->laststatval;
1266	PL_statcache = data->statcache;	1798	PL_statcache = data->statcache;
1267	}	1799	}
		1800

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