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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.116 by root, Fri Dec 1 14:01:43 2006 UTC vs.
Revision 1.180 by root, Wed Oct 3 17:12:20 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	/* the maximum number of idle cctx that will be pooled */
14	#define MAX_IDLE_CCTX 8
15
16	#define PERL_VERSION_ATLEAST(a,b,c) \
17	(PERL_REVISION > (a) \
18	|| (PERL_REVISION == (a) \
19	&& (PERL_VERSION > (b) \
20	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22	#if !PERL_VERSION_ATLEAST (5,6,0)
23	# ifndef PL_ppaddr
24	# define PL_ppaddr ppaddr
25	# endif
26	# ifndef call_sv
27	# define call_sv perl_call_sv
28	# endif
29	# ifndef get_sv
30	# define get_sv perl_get_sv
31	# endif
32	# ifndef get_cv
33	# define get_cv perl_get_cv
34	# endif
35	# ifndef IS_PADGV
36	# define IS_PADGV(v) 0
37	# endif
38	# ifndef IS_PADCONST
39	# define IS_PADCONST(v) 0
40	# endif
41	#endif
42
43	#include <stdio.h>	11	#include <stdio.h>
44	#include <errno.h>	12	#include <errno.h>
45		13	#include <assert.h>
46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	# undef STACKGUARD
48	#endif
49
50	#ifndef STACKGUARD
51	# define STACKGUARD 0
52	#endif
53		14
54	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
55	# include <unistd.h>	16	# include <unistd.h>
56	# include <sys/mman.h>	17	# include <sys/mman.h>
57	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
72	#else	33	#else
73	# define PAGESIZE 0	34	# define PAGESIZE 0
74	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
75	#endif	36	#endif
76		37
77	/* The next macro should declare a variable stacklevel that contains and approximation	38	#if CORO_USE_VALGRIND
78	* to the current C stack pointer. Its property is that it changes with each call	39	# include <valgrind/valgrind.h>
79	* 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. */
80	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
81	#define STACKLEVEL ((void *)&stacklevel)	96	#define STACKLEVEL ((void *)&stacklevel)
82		97
83	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
84		99
85	#if __GNUC__ >= 3	100	#if __GNUC__ >= 3
86	# define attribute(x) __attribute__(x)	101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
87	#else	103	#else
88	# define attribute(x)	104	# define attribute(x)
		105	# define BARRIER
89	#endif	106	#endif
90		107
91	#define NOINLINE attribute ((noinline))	108	#define NOINLINE attribute ((noinline))
92		109
93	#include "CoroAPI.h"	110	#include "CoroAPI.h"
94
95	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96		111
97	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
98	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
99	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
100	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
101	#else	116	#else
102	# define LOCK (void)0	117	# define LOCK (void)0
103	# define UNLOCK (void)0	118	# define UNLOCK (void)0
104	#endif	119	#endif
105		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;
106	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
107	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;
108	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
109	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
110		136
		137	static GV *irsgv; /* $/ */
		138
		139	/* async_pool helper stuff */
		140	static SV *sv_pool_rss;
		141	static SV *sv_pool_size;
		142	static AV *av_async_pool;
		143
111	static struct coro_cctx *cctx_first;	144	static struct coro_cctx *cctx_first;
112	static int cctx_count, cctx_idle;	145	static int cctx_count, cctx_idle;
		146
		147	enum {
		148	CC_MAPPED = 0x01,
		149	CC_NOREUSE = 0x02, /* throw this away after tracing */
		150	CC_TRACE = 0x04,
		151	CC_TRACE_SUB = 0x08, /* trace sub calls */
		152	CC_TRACE_LINE = 0x10, /* trace each statement */
		153	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		154	};
113		155
114	/* this is a structure representing a c-level coroutine */	156	/* this is a structure representing a c-level coroutine */
115	typedef struct coro_cctx {	157	typedef struct coro_cctx {
116	struct coro_cctx *next;	158	struct coro_cctx *next;
117		159
118	/* the stack */	160	/* the stack */
119	void *sptr;	161	void *sptr;
120	long ssize; /* positive == mmap, otherwise malloc */	162	size_t ssize;
121		163
122	/* cpu state */	164	/* cpu state */
123	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	165	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		166	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
124	JMPENV *top_env;	167	JMPENV *top_env;
125	coro_context cctx;	168	coro_context cctx;
126		169
127	int inuse;
128
129	#if USE_VALGRIND	170	#if CORO_USE_VALGRIND
130	int valgrind_id;	171	int valgrind_id;
131	#endif	172	#endif
		173	unsigned char flags;
132	} coro_cctx;	174	} coro_cctx;
133		175
134	enum {	176	enum {
135	CF_RUNNING, /* coroutine is running */	177	CF_RUNNING = 0x0001, /* coroutine is running */
136	CF_READY, /* coroutine is ready */	178	CF_READY = 0x0002, /* coroutine is ready */
		179	CF_NEW = 0x0004, /* has never been switched to */
		180	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
137	};	181	};
138		182
139	/* this is a structure representing a perl-level coroutine */	183	/* this is a structure representing a perl-level coroutine */
140	struct coro {	184	struct coro {
141	/* the c coroutine allocated to this perl coroutine, if any */	185	/* the c coroutine allocated to this perl coroutine, if any */
142	coro_cctx *cctx;	186	coro_cctx *cctx;
143		187
144	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
145	AV *args;	189	AV *args;
146	int refcnt;	190	int refcnt;
147	int flags;	191	int flags; /* CF_ flags */
148		192
149	/* optionally saved, might be zero */	193	/* optionally saved, might be zero */
150	AV *defav;	194	AV *defav; /* @_ */
151	SV *defsv;	195	SV *defsv; /* $_ */
152	SV *errsv;	196	SV *errsv; /* $@ */
		197	IO *deffh; /* default filehandle */
		198	SV *irssv; /* $/ */
		199	SV *irssv_sv; /* real $/ cache */
153		200
154	#define VAR(name,type) type name;	201	#define VAR(name,type) type name;
155	# include "state.h"	202	# include "state.h"
156	#undef VAR	203	#undef VAR
157		204
		205	/* statistics */
		206	int usecount; /* number of switches to this coro */
		207
158	/* coro process data */	208	/* coro process data */
159	int prio;	209	int prio;
		210
		211	/* linked list */
		212	struct coro *next, *prev;
		213	HV *hv; /* the perl hash associated with this coro, if any */
160	};	214	};
161		215
162	typedef struct coro *Coro__State;	216	typedef struct coro *Coro__State;
163	typedef struct coro *Coro__State_or_hashref;	217	typedef struct coro *Coro__State_or_hashref;
164		218
		219	/** Coro ********************************************************************/
		220
		221	#define PRIO_MAX 3
		222	#define PRIO_HIGH 1
		223	#define PRIO_NORMAL 0
		224	#define PRIO_LOW -1
		225	#define PRIO_IDLE -3
		226	#define PRIO_MIN -4
		227
		228	/* for Coro.pm */
		229	static SV *coro_current;
		230	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		231	static int coro_nready;
		232	static struct coro *coro_first;
		233
		234	/** lowlevel stuff **********************************************************/
		235
165	static AV *	236	static AV *
166	coro_clone_padlist (CV *cv)	237	coro_clone_padlist (pTHX_ CV *cv)
167	{	238	{
168	AV *padlist = CvPADLIST (cv);	239	AV *padlist = CvPADLIST (cv);
169	AV *newpadlist, *newpad;	240	AV *newpadlist, *newpad;
170		241
171	newpadlist = newAV ();	242	newpadlist = newAV ();
…		…
183		254
184	return newpadlist;	255	return newpadlist;
185	}	256	}
186		257
187	static void	258	static void
188	free_padlist (AV *padlist)	259	free_padlist (pTHX_ AV *padlist)
189	{	260	{
190	/* may be during global destruction */	261	/* may be during global destruction */
191	if (SvREFCNT (padlist))	262	if (SvREFCNT (padlist))
192	{	263	{
193	I32 i = AvFILLp (padlist);	264	I32 i = AvFILLp (padlist);
…		…
214	AV *padlist;	285	AV *padlist;
215	AV *av = (AV *)mg->mg_obj;	286	AV *av = (AV *)mg->mg_obj;
216		287
217	/* casting is fun. */	288	/* casting is fun. */
218	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	289	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
219	free_padlist (padlist);	290	free_padlist (aTHX_ padlist);
220		291
221	SvREFCNT_dec (av);	292	SvREFCNT_dec (av);
222		293
223	return 0;	294	return 0;
224	}	295	}
…		…
232	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	303	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
233	? SvMAGIC (cv) \	304	? SvMAGIC (cv) \
234	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	305	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
235	: 0	306	: 0
236		307
		308	static struct coro *
		309	SvSTATE_ (pTHX_ SV *coro)
		310	{
		311	HV *stash;
		312	MAGIC *mg;
		313
		314	if (SvROK (coro))
		315	coro = SvRV (coro);
		316
		317	if (SvTYPE (coro) != SVt_PVHV)
		318	croak ("Coro::State object required");
		319
		320	stash = SvSTASH (coro);
		321	if (stash != coro_stash && stash != coro_state_stash)
		322	{
		323	/* very slow, but rare, check */
		324	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		325	croak ("Coro::State object required");
		326	}
		327
		328	mg = CORO_MAGIC (coro);
		329	return (struct coro *)mg->mg_ptr;
		330	}
		331
		332	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		333
237	/* the next two functions merely cache the padlists */	334	/* the next two functions merely cache the padlists */
238	static void	335	static void
239	get_padlist (CV *cv)	336	get_padlist (pTHX_ CV *cv)
240	{	337	{
241	MAGIC *mg = CORO_MAGIC (cv);	338	MAGIC *mg = CORO_MAGIC (cv);
242	AV *av;	339	AV *av;
243		340
244	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	341	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
245	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	342	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
246	else	343	else
247	{	344	{
248	#if 0	345	#if CORO_PREFER_PERL_FUNCTIONS
249	/* this is probably cleaner, but also slower? */	346	/* this is probably cleaner, but also slower? */
250	CV *cp = Perl_cv_clone (cv);	347	CV *cp = Perl_cv_clone (cv);
251	CvPADLIST (cv) = CvPADLIST (cp);	348	CvPADLIST (cv) = CvPADLIST (cp);
252	CvPADLIST (cp) = 0;	349	CvPADLIST (cp) = 0;
253	SvREFCNT_dec (cp);	350	SvREFCNT_dec (cp);
254	#else	351	#else
255	CvPADLIST (cv) = coro_clone_padlist (cv);	352	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
256	#endif	353	#endif
257	}	354	}
258	}	355	}
259		356
260	static void	357	static void
261	put_padlist (CV *cv)	358	put_padlist (pTHX_ CV *cv)
262	{	359	{
263	MAGIC *mg = CORO_MAGIC (cv);	360	MAGIC *mg = CORO_MAGIC (cv);
264	AV *av;	361	AV *av;
265		362
266	if (!mg)	363	if (!mg)
…		…
277	av_extend (av, AvMAX (av) + 1);	374	av_extend (av, AvMAX (av) + 1);
278		375
279	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	376	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
280	}	377	}
281		378
282	#define SB do {	379	/** load & save, init *******************************************************/
283	#define SE } while (0)
284		380
285	#define LOAD(state) load_state((state));
286	#define SAVE(state,flags) save_state((state),(flags));
287
288	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
289
290	static void	381	static void
291	load_state(Coro__State c)	382	load_perl (pTHX_ Coro__State c)
292	{	383	{
293	#define VAR(name,type) PL_ ## name = c->name;	384	#define VAR(name,type) PL_ ## name = c->name;
294	# include "state.h"	385	# include "state.h"
295	#undef VAR	386	#undef VAR
296		387
297	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	388	GvSV (PL_defgv) = c->defsv;
298	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	389	GvAV (PL_defgv) = c->defav;
299	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	390	GvSV (PL_errgv) = c->errsv;
		391	PL_defoutgv = c->deffh;
		392	PL_rs = c->irssv;
		393	GvSV (irsgv) = c->irssv_sv;
300		394
301	{	395	{
302	dSP;	396	dSP;
303	CV *cv;	397	CV *cv;
304		398
305	/* now do the ugly restore mess */	399	/* now do the ugly restore mess */
306	while ((cv = (CV *)POPs))	400	while ((cv = (CV *)POPs))
307	{	401	{
308	put_padlist (cv); /* mark this padlist as available */	402	put_padlist (aTHX_ cv); /* mark this padlist as available */
309	CvDEPTH (cv) = PTR2IV (POPs);	403	CvDEPTH (cv) = PTR2IV (POPs);
310	CvPADLIST (cv) = (AV *)POPs;	404	CvPADLIST (cv) = (AV *)POPs;
311	}	405	}
312		406
313	PUTBACK;	407	PUTBACK;
314	}	408	}
315	}	409	}
316		410
317	static void	411	static void
318	save_state(Coro__State c, int flags)	412	save_perl (pTHX_ Coro__State c)
319	{	413	{
320	{	414	{
321	dSP;	415	dSP;
322	I32 cxix = cxstack_ix;	416	I32 cxix = cxstack_ix;
323	PERL_CONTEXT *ccstk = cxstack;	417	PERL_CONTEXT *ccstk = cxstack;
…		…
326	/*	420	/*
327	* the worst thing you can imagine happens first - we have to save	421	* the worst thing you can imagine happens first - we have to save
328	* (and reinitialize) all cv's in the whole callchain :(	422	* (and reinitialize) all cv's in the whole callchain :(
329	*/	423	*/
330		424
331	PUSHs (Nullsv);	425	XPUSHs (Nullsv);
332	/* this loop was inspired by pp_caller */	426	/* this loop was inspired by pp_caller */
333	for (;;)	427	for (;;)
334	{	428	{
335	while (cxix >= 0)	429	while (cxix >= 0)
336	{	430	{
337	PERL_CONTEXT *cx = &ccstk[cxix--];	431	PERL_CONTEXT *cx = &ccstk[cxix--];
338		432
339	if (CxTYPE(cx) == CXt_SUB)	433	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
340	{	434	{
341	CV *cv = cx->blk_sub.cv;	435	CV *cv = cx->blk_sub.cv;
342		436
343	if (CvDEPTH (cv))	437	if (CvDEPTH (cv))
344	{	438	{
345	EXTEND (SP, 3);	439	EXTEND (SP, 3);
346
347	PUSHs ((SV *)CvPADLIST(cv));	440	PUSHs ((SV *)CvPADLIST (cv));
348	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	441	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
349	PUSHs ((SV *)cv);	442	PUSHs ((SV *)cv);
350		443
351	CvDEPTH (cv) = 0;	444	CvDEPTH (cv) = 0;
352	get_padlist (cv);	445	get_padlist (aTHX_ cv);
353	}	446	}
354	}	447	}
355	#ifdef CXt_FORMAT
356	else if (CxTYPE(cx) == CXt_FORMAT)
357	{
358	/* I never used formats, so how should I know how these are implemented? */
359	/* my bold guess is as a simple, plain sub... */
360	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
361	}
362	#endif
363	}	448	}
364		449
365	if (top_si->si_type == PERLSI_MAIN)	450	if (top_si->si_type == PERLSI_MAIN)
366	break;	451	break;
367		452
368	top_si = top_si->si_prev;	453	top_si = top_si->si_prev;
369	ccstk = top_si->si_cxstack;	454	ccstk = top_si->si_cxstack;
370	cxix = top_si->si_cxix;	455	cxix = top_si->si_cxix;
371	}	456	}
372		457
373	PUTBACK;	458	PUTBACK;
374	}	459	}
375		460
376	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	461	c->defav = GvAV (PL_defgv);
377	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	462	c->defsv = DEFSV;
378	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	463	c->errsv = ERRSV;
		464	c->deffh = PL_defoutgv;
		465	c->irssv = PL_rs;
		466	c->irssv_sv = GvSV (irsgv);
379		467
380	#define VAR(name,type)c->name = PL_ ## name;	468	#define VAR(name,type)c->name = PL_ ## name;
381	# include "state.h"	469	# include "state.h"
382	#undef VAR	470	#undef VAR
383	}	471	}
…		…
386	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
387	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
388	* on the (sometimes correct) assumption that coroutines do	476	* on the (sometimes correct) assumption that coroutines do
389	* not usually need a lot of stackspace.	477	* not usually need a lot of stackspace.
390	*/	478	*/
		479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
391	static void	482	static void
392	coro_init_stacks ()	483	coro_init_stacks (pTHX)
393	{	484	{
394	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	485	PL_curstackinfo = new_stackinfo(64, 6);
395	PL_curstackinfo->si_type = PERLSI_MAIN;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
396	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
397	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
398		489
399	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
400	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
401	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
402		493
403	New(50,PL_tmps_stack,128,SV*);	494	New(50,PL_tmps_stack,64,SV*);
404	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
405	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
406	PL_tmps_max = 128;	497	PL_tmps_max = 64;
407		498
408	New(54,PL_markstack,32,I32);	499	New(54,PL_markstack,16,I32);
409	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
410	PL_markstack_max = PL_markstack + 32;	501	PL_markstack_max = PL_markstack + 16;
411		502
412	#ifdef SET_MARK_OFFSET	503	#ifdef SET_MARK_OFFSET
413	SET_MARK_OFFSET;	504	SET_MARK_OFFSET;
414	#endif	505	#endif
415		506
416	New(54,PL_scopestack,32,I32);	507	New(54,PL_scopestack,16,I32);
417	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
418	PL_scopestack_max = 32;	509	PL_scopestack_max = 16;
419		510
420	New(54,PL_savestack,64,ANY);	511	New(54,PL_savestack,64,ANY);
421	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
422	PL_savestack_max = 64;	513	PL_savestack_max = 64;
423		514
424	#if !PERL_VERSION_ATLEAST (5,9,0)	515	#if !PERL_VERSION_ATLEAST (5,9,0)
425	New(54,PL_retstack,16,OP*);	516	New(54,PL_retstack,4,OP*);
426	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
427	PL_retstack_max = 16;	518	PL_retstack_max = 4;
428	#endif	519	#endif
429	}	520	}
		521	#endif
430		522
431	/*	523	/*
432	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
433	*/	525	*/
434	static void	526	static void
435	coro_destroy_stacks ()	527	coro_destroy_stacks (pTHX)
436	{	528	{
437	if (!IN_DESTRUCT)
438	{
439	/* is this ugly, I ask? */
440	LEAVE_SCOPE (0);
441
442	/* sure it is, but more important: is it correct?? :/ */
443	FREETMPS;
444
445	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
446	}
447
448	while (PL_curstackinfo->si_next)	529	while (PL_curstackinfo->si_next)
449	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
450		531
451	while (PL_curstackinfo)	532	while (PL_curstackinfo)
452	{	533	{
453	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
454		535
455	{ /*D*//*remove*/
456	dSP;
457	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
458	PUTBACK; /* possibly superfluous */
459	}
460
461	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
462	{
463	dounwind (-1);/*D*//*remove*/
464	SvREFCNT_dec (PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
465	}
466		538
467	Safefree (PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
468	Safefree (PL_curstackinfo);	540	Safefree (PL_curstackinfo);
469	PL_curstackinfo = p;	541	PL_curstackinfo = p;
470	}	542	}
…		…
476	#if !PERL_VERSION_ATLEAST (5,9,0)	548	#if !PERL_VERSION_ATLEAST (5,9,0)
477	Safefree (PL_retstack);	549	Safefree (PL_retstack);
478	#endif	550	#endif
479	}	551	}
480		552
481	static void	553	static size_t
482	setup_coro (struct coro *coro)	554	coro_rss (pTHX_ struct coro *coro)
		555	{
		556	size_t rss = sizeof (coro);
		557
		558	if (coro->mainstack)
		559	{
		560	if (coro->flags & CF_RUNNING)
		561	{
		562	#define VAR(name,type)coro->name = PL_ ## name;
		563	# include "state.h"
		564	#undef VAR
		565	}
		566
		567	rss += sizeof (coro->curstackinfo);
		568	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		569	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		570	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		571	rss += coro->tmps_max * sizeof (SV *);
		572	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		573	rss += coro->scopestack_max * sizeof (I32);
		574	rss += coro->savestack_max * sizeof (ANY);
		575
		576	#if !PERL_VERSION_ATLEAST (5,9,0)
		577	rss += coro->retstack_max * sizeof (OP *);
		578	#endif
		579	}
		580
		581	return rss;
		582	}
		583
		584	/** coroutine stack handling ************************************************/
		585
		586	static void
		587	coro_setup (pTHX_ struct coro *coro)
483	{	588	{
484	/*	589	/*
485	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
486	*/	591	*/
487
488	coro_init_stacks ();	592	coro_init_stacks (aTHX);
489		593
		594	PL_runops = RUNOPS_DEFAULT;
		595	PL_curcop = &PL_compiling;
		596	PL_in_eval = EVAL_NULL;
490	PL_curcop = 0;	597	PL_comppad = 0;
491	PL_in_eval = 0;
492	PL_curpm = 0;	598	PL_curpm = 0;
		599	PL_localizing = 0;
		600	PL_dirty = 0;
		601	PL_restartop = 0;
		602
		603	GvSV (PL_defgv) = NEWSV (0, 0);
		604	GvAV (PL_defgv) = coro->args; coro->args = 0;
		605	GvSV (PL_errgv) = NEWSV (0, 0);
		606	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		607	PL_rs = newSVsv (GvSV (irsgv));
		608
		609	{
		610	IO *io = newIO ();
		611	PL_defoutgv = newGVgen ("Coro");
		612	GvIOp(PL_defoutgv) = io;
		613	IoTYPE (io) = IoTYPE_WRONLY;
		614	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		615	IoFLAGS (io) |= IOf_FLUSH;
		616	}
493		617
494	{	618	{
495	dSP;	619	dSP;
496	LOGOP myop;	620	LOGOP myop;
497		621
498	/* I have no idea why this is needed, but it is */
499	PUSHMARK (SP);
500
501	SvREFCNT_dec (GvAV (PL_defgv));
502	GvAV (PL_defgv) = coro->args; coro->args = 0;
503
504	Zero (&myop, 1, LOGOP);	622	Zero (&myop, 1, LOGOP);
505	myop.op_next = Nullop;	623	myop.op_next = Nullop;
506	myop.op_flags = OPf_WANT_VOID;	624	myop.op_flags = OPf_WANT_VOID;
507		625
		626	PUSHMARK (SP);
		627	XPUSHs (av_shift (GvAV (PL_defgv)));
		628	PUTBACK;
508	PL_op = (OP *)&myop;	629	PL_op = (OP *)&myop;
509
510	PUSHMARK (SP);
511	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
512	PUTBACK;
513	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	630	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
514	SPAGAIN;	631	SPAGAIN;
515
516	ENTER; /* necessary e.g. for dounwind */
517	}	632	}
518	}
519		633
		634	ENTER; /* necessary e.g. for dounwind */
		635	}
		636
520	static void	637	static void
		638	coro_destroy (pTHX_ struct coro *coro)
		639	{
		640	if (!IN_DESTRUCT)
		641	{
		642	/* restore all saved variables and stuff */
		643	LEAVE_SCOPE (0);
		644	assert (PL_tmps_floor == -1);
		645
		646	/* free all temporaries */
		647	FREETMPS;
		648	assert (PL_tmps_ix == -1);
		649
		650	/* unwind all extra stacks */
		651	POPSTACK_TO (PL_mainstack);
		652
		653	/* unwind main stack */
		654	dounwind (-1);
		655	}
		656
		657	SvREFCNT_dec (GvSV (PL_defgv));
		658	SvREFCNT_dec (GvAV (PL_defgv));
		659	SvREFCNT_dec (GvSV (PL_errgv));
		660	SvREFCNT_dec (PL_defoutgv);
		661	SvREFCNT_dec (PL_rs);
		662	SvREFCNT_dec (GvSV (irsgv));
		663
		664	coro_destroy_stacks (aTHX);
		665	}
		666
		667	static void
521	free_coro_mortal ()	668	free_coro_mortal (pTHX)
522	{	669	{
523	if (coro_mortal)	670	if (coro_mortal)
524	{	671	{
525	SvREFCNT_dec (coro_mortal);	672	SvREFCNT_dec (coro_mortal);
526	coro_mortal = 0;	673	coro_mortal = 0;
527	}	674	}
528	}	675	}
529		676
		677	static int
		678	runops_trace (pTHX)
		679	{
		680	COP *oldcop = 0;
		681	int oldcxix = -2;
		682	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		683	coro_cctx *cctx = coro->cctx;
		684
		685	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		686	{
		687	PERL_ASYNC_CHECK ();
		688
		689	if (cctx->flags & CC_TRACE_ALL)
		690	{
		691	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		692	{
		693	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		694	SV **bot, **top;
		695	AV *av = newAV (); /* return values */
		696	SV **cb;
		697	dSP;
		698
		699	GV *gv = CvGV (cx->blk_sub.cv);
		700	SV *fullname = sv_2mortal (newSV (0));
		701	if (isGV (gv))
		702	gv_efullname3 (fullname, gv, 0);
		703
		704	bot = PL_stack_base + cx->blk_oldsp + 1;
		705	top = cx->blk_gimme == G_ARRAY ? SP + 1
		706	: cx->blk_gimme == G_SCALAR ? bot + 1
		707	: bot;
		708
		709	while (bot < top)
		710	av_push (av, SvREFCNT_inc (*bot++));
		711
		712	PL_runops = RUNOPS_DEFAULT;
		713	ENTER;
		714	SAVETMPS;
		715	EXTEND (SP, 3);
		716	PUSHMARK (SP);
		717	PUSHs (&PL_sv_no);
		718	PUSHs (fullname);
		719	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		720	PUTBACK;
		721	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		722	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		723	SPAGAIN;
		724	FREETMPS;
		725	LEAVE;
		726	PL_runops = runops_trace;
		727	}
		728
		729	if (oldcop != PL_curcop)
		730	{
		731	oldcop = PL_curcop;
		732
		733	if (PL_curcop != &PL_compiling)
		734	{
		735	SV **cb;
		736
		737	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		738	{
		739	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		740
		741	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		742	{
		743	runops_proc_t old_runops = PL_runops;
		744	dSP;
		745	GV *gv = CvGV (cx->blk_sub.cv);
		746	SV *fullname = sv_2mortal (newSV (0));
		747
		748	if (isGV (gv))
		749	gv_efullname3 (fullname, gv, 0);
		750
		751	PL_runops = RUNOPS_DEFAULT;
		752	ENTER;
		753	SAVETMPS;
		754	EXTEND (SP, 3);
		755	PUSHMARK (SP);
		756	PUSHs (&PL_sv_yes);
		757	PUSHs (fullname);
		758	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		759	PUTBACK;
		760	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		761	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		762	SPAGAIN;
		763	FREETMPS;
		764	LEAVE;
		765	PL_runops = runops_trace;
		766	}
		767
		768	oldcxix = cxstack_ix;
		769	}
		770
		771	if (cctx->flags & CC_TRACE_LINE)
		772	{
		773	dSP;
		774
		775	PL_runops = RUNOPS_DEFAULT;
		776	ENTER;
		777	SAVETMPS;
		778	EXTEND (SP, 3);
		779	PL_runops = RUNOPS_DEFAULT;
		780	PUSHMARK (SP);
		781	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		782	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		783	PUTBACK;
		784	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		785	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		786	SPAGAIN;
		787	FREETMPS;
		788	LEAVE;
		789	PL_runops = runops_trace;
		790	}
		791	}
		792	}
		793	}
		794	}
		795
		796	TAINT_NOT;
		797	return 0;
		798	}
		799
		800	/* inject a fake call to Coro::State::_cctx_init into the execution */
		801	/* _cctx_init should be careful, as it could be called at almost any time */
		802	/* during execution of a perl program */
530	static void NOINLINE	803	static void NOINLINE
531	prepare_cctx (coro_cctx *cctx)	804	prepare_cctx (pTHX_ coro_cctx *cctx)
532	{	805	{
533	dSP;	806	dSP;
534	LOGOP myop;	807	LOGOP myop;
535		808
		809	PL_top_env = &PL_start_env;
		810
		811	if (cctx->flags & CC_TRACE)
		812	PL_runops = runops_trace;
		813
536	Zero (&myop, 1, LOGOP);	814	Zero (&myop, 1, LOGOP);
537	myop.op_next = PL_op;	815	myop.op_next = PL_op;
538	myop.op_flags = OPf_WANT_VOID;	816	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
539
540	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
541		817
542	PUSHMARK (SP);	818	PUSHMARK (SP);
		819	EXTEND (SP, 2);
		820	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
543	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	821	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
544	PUTBACK;	822	PUTBACK;
		823	PL_op = (OP *)&myop;
545	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	824	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
546	SPAGAIN;	825	SPAGAIN;
547	}	826	}
548		827
		828	/*
		829	* this is a _very_ stripped down perl interpreter ;)
		830	*/
549	static void	831	static void
550	coro_run (void *arg)	832	coro_run (void *arg)
551	{	833	{
		834	dTHX;
		835
552	/* coro_run is the alternative epilogue of transfer() */	836	/* coro_run is the alternative tail of transfer(), so unlock here. */
553	UNLOCK;	837	UNLOCK;
554		838
		839	/* we now skip the entersub that lead to transfer() */
		840	PL_op = PL_op->op_next;
		841
		842	/* inject a fake subroutine call to cctx_init */
		843	prepare_cctx (aTHX_ (coro_cctx *)arg);
		844
		845	/* somebody or something will hit me for both perl_run and PL_restartop */
		846	PL_restartop = PL_op;
		847	perl_run (PL_curinterp);
		848
555	/*	849	/*
556	* this is a _very_ stripped down perl interpreter ;)	850	* If perl-run returns we assume exit() was being called or the coro
		851	* fell off the end, which seems to be the only valid (non-bug)
		852	* reason for perl_run to return. We try to exit by jumping to the
		853	* bootstrap-time "top" top_env, as we cannot restore the "main"
		854	* coroutine as Coro has no such concept
557	*/	855	*/
558	PL_top_env = &PL_start_env;	856	PL_top_env = main_top_env;
559		857	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
560	/* inject call to cctx_init */
561	prepare_cctx ((coro_cctx *)arg);
562
563	/* somebody will hit me for both perl_run and PL_restartop */
564	perl_run (PL_curinterp);
565
566	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
567	abort ();
568	}	858	}
569		859
570	static coro_cctx *	860	static coro_cctx *
571	cctx_new ()	861	cctx_new ()
572	{	862	{
573	coro_cctx *cctx;	863	coro_cctx *cctx;
		864	void *stack_start;
		865	size_t stack_size;
574		866
575	++cctx_count;	867	++cctx_count;
576		868
577	New (0, cctx, 1, coro_cctx);	869	Newz (0, cctx, 1, coro_cctx);
578		870
579	#if HAVE_MMAP	871	#if HAVE_MMAP
580		872
581	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	873	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
582	/* mmap suppsedly does allocate-on-write for us */	874	/* mmap supposedly does allocate-on-write for us */
583	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	875	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
584		876
585	if (cctx->sptr == (void *)-1)	877	if (cctx->sptr != (void *)-1)
586	{
587	perror ("FATAL: unable to mmap stack for coroutine");
588	_exit (EXIT_FAILURE);
589	}	878	{
590
591	# if STACKGUARD	879	# if CORO_STACKGUARD
592	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	880	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
593	# endif	881	# endif
		882	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		883	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		884	cctx->flags |= CC_MAPPED;
		885	}
		886	else
		887	#endif
		888	{
		889	cctx->ssize = coro_stacksize * (long)sizeof (long);
		890	New (0, cctx->sptr, coro_stacksize, long);
594		891
595	#else
596
597	cctx->ssize = STACKSIZE * (long)sizeof (long);
598	New (0, cctx->sptr, STACKSIZE, long);
599
600	if (!cctx->sptr)	892	if (!cctx->sptr)
601	{	893	{
602	perror ("FATAL: unable to malloc stack for coroutine");	894	perror ("FATAL: unable to allocate stack for coroutine");
603	_exit (EXIT_FAILURE);	895	_exit (EXIT_FAILURE);
604	}	896	}
605		897
606	#endif	898	stack_start = cctx->sptr;
		899	stack_size = cctx->ssize;
		900	}
607		901
608	#if USE_VALGRIND	902	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
609	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
610	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
611	cctx->ssize + (char *)cctx->sptr
612	);
613	#endif
614
615	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	903	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
616		904
617	return cctx;	905	return cctx;
618	}	906	}
619		907
620	static void	908	static void
…		…
623	if (!cctx)	911	if (!cctx)
624	return;	912	return;
625		913
626	--cctx_count;	914	--cctx_count;
627		915
628	#if USE_VALGRIND	916	#if CORO_USE_VALGRIND
629	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	917	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
630	#endif	918	#endif
631		919
632	#if HAVE_MMAP	920	#if HAVE_MMAP
		921	if (cctx->flags & CC_MAPPED)
633	munmap (cctx->sptr, cctx->ssize);	922	munmap (cctx->sptr, cctx->ssize);
634	#else	923	else
		924	#endif
635	Safefree (cctx->sptr);	925	Safefree (cctx->sptr);
636	#endif
637		926
638	Safefree (cctx);	927	Safefree (cctx);
639	}	928	}
640		929
641	static coro_cctx *	930	static coro_cctx *
642	cctx_get ()	931	cctx_get (pTHX)
643	{	932	{
644	coro_cctx *cctx;
645
646	if (cctx_first)	933	while (cctx_first)
647	{	934	{
648	cctx = cctx_first;	935	coro_cctx *cctx = cctx_first;
649	cctx_first = cctx->next;	936	cctx_first = cctx->next;
650	--cctx_idle;	937	--cctx_idle;
651	}	938
652	else	939	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
653	{	940	return cctx;
654	cctx = cctx_new ();	941
655	PL_op = PL_op->op_next;	942	cctx_destroy (cctx);
656	}	943	}
657		944
658	return cctx;	945	return cctx_new ();
659	}	946	}
660		947
661	static void	948	static void
662	cctx_put (coro_cctx *cctx)	949	cctx_put (coro_cctx *cctx)
663	{	950	{
…		…
666	{	953	{
667	coro_cctx *first = cctx_first;	954	coro_cctx *first = cctx_first;
668	cctx_first = first->next;	955	cctx_first = first->next;
669	--cctx_idle;	956	--cctx_idle;
670		957
671	assert (!first->inuse);
672	cctx_destroy (first);	958	cctx_destroy (first);
673	}	959	}
674		960
675	++cctx_idle;	961	++cctx_idle;
676	cctx->next = cctx_first;	962	cctx->next = cctx_first;
677	cctx_first = cctx;	963	cctx_first = cctx;
678	}	964	}
679		965
680	/* never call directly, always through the coro_state_transfer global variable */	966	/** coroutine switching *****************************************************/
		967
681	static void NOINLINE	968	static void NOINLINE
		969	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		970	{
		971	if (prev != next)
		972	{
		973	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		974	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		975
		976	if (next->flags & CF_RUNNING)
		977	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		978
		979	if (next->flags & CF_DESTROYED)
		980	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		981
		982	if (PL_lex_state != LEX_NOTPARSING)
		983	croak ("Coro::State::transfer called while parsing, but this is not supported");
		984	}
		985	}
		986
		987	/* always use the TRANSFER macro */
		988	static void NOINLINE
682	transfer (struct coro *prev, struct coro *next, int flags)	989	transfer (pTHX_ struct coro *prev, struct coro *next)
683	{	990	{
684	dSTACKLEVEL;	991	dSTACKLEVEL;
685		992
686	/* sometimes transfer is only called to set idle_sp */	993	/* sometimes transfer is only called to set idle_sp */
687	if (flags == TRANSFER_SET_STACKLEVEL)	994	if (!next)
		995	{
688	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	996	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		997	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		998	}
689	else if (prev != next)	999	else if (prev != next)
690	{	1000	{
691	coro_cctx *prev__cctx;	1001	coro_cctx *prev__cctx;
692		1002
693	if (!prev->cctx)	1003	if (prev->flags & CF_NEW)
694	{	1004	{
695	/* create a new empty context */	1005	/* create a new empty context */
696	Newz (0, prev->cctx, 1, coro_cctx);	1006	Newz (0, prev->cctx, 1, coro_cctx);
697	prev->cctx->inuse = 1;	1007	prev->flags &= ~CF_NEW;
698	prev->flags |= CF_RUNNING;	1008	prev->flags |= CF_RUNNING;
699	}	1009	}
700
701	if (!prev->flags & CF_RUNNING)
702	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
703
704	if (next->flags & CF_RUNNING)
705	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
706		1010
707	prev->flags &= ~CF_RUNNING;	1011	prev->flags &= ~CF_RUNNING;
708	next->flags |= CF_RUNNING;	1012	next->flags |= CF_RUNNING;
709		1013
710	LOCK;	1014	LOCK;
711		1015
712	if (next->mainstack)	1016	if (next->flags & CF_NEW)
713	{	1017	{
714	/* coroutine already started */	1018	/* need to start coroutine */
715	SAVE (prev, flags);	1019	next->flags &= ~CF_NEW;
716	LOAD (next);	1020	/* first get rid of the old state */
		1021	save_perl (aTHX_ prev);
		1022	/* setup coroutine call */
		1023	coro_setup (aTHX_ next);
717	}	1024	}
718	else	1025	else
719	{	1026	{
720	/* need to start coroutine */	1027	/* coroutine already started */
721	/* first get rid of the old state */	1028	save_perl (aTHX_ prev);
722	SAVE (prev, -1);	1029	load_perl (aTHX_ next);
723	/* setup coroutine call */
724	setup_coro (next);
725	/* need a new stack */
726	assert (!next->stack);
727	}	1030	}
728		1031
729	prev__cctx = prev->cctx;	1032	prev__cctx = prev->cctx;
730		1033
731	/* possibly "free" the cctx */	1034	/* possibly "free" the cctx */
732	if (prev__cctx->idle_sp == STACKLEVEL)	1035	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
733	{	1036	{
734	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1037	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
735	assert (PL_top_env == prev__cctx->top_env);	1038	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1039
		1040	prev->cctx = 0;
736		1041
737	cctx_put (prev__cctx);	1042	cctx_put (prev__cctx);
738	prev->cctx = 0;
739	}	1043	}
740		1044
		1045	++next->usecount;
		1046
741	if (!next->cctx)	1047	if (!next->cctx)
742	next->cctx = cctx_get ();	1048	next->cctx = cctx_get (aTHX);
743		1049
744	if (prev__cctx != next->cctx)	1050	if (prev__cctx != next->cctx)
745	{	1051	{
746	assert ( prev__cctx->inuse);
747	assert (!next->cctx->inuse);
748
749	prev__cctx->inuse = 0;
750	next->cctx->inuse = 1;
751
752	prev__cctx->top_env = PL_top_env;	1052	prev__cctx->top_env = PL_top_env;
753	PL_top_env = next->cctx->top_env;	1053	PL_top_env = next->cctx->top_env;
754	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1054	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
755	}	1055	}
756		1056
757	free_coro_mortal ();	1057	free_coro_mortal (aTHX);
758
759	UNLOCK;	1058	UNLOCK;
760	}	1059	}
761	}	1060	}
762		1061
763	struct transfer_args	1062	struct transfer_args
764	{	1063	{
765	struct coro *prev, *next;	1064	struct coro *prev, *next;
766	int flags;
767	};	1065	};
768		1066
769	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1067	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1068	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
770		1069
		1070	/** high level stuff ********************************************************/
		1071
771	static void	1072	static int
772	coro_state_destroy (struct coro *coro)	1073	coro_state_destroy (pTHX_ struct coro *coro)
773	{	1074	{
774	if (coro->refcnt--)	1075	if (coro->flags & CF_DESTROYED)
775	return;	1076	return 0;
776		1077
		1078	coro->flags |= CF_DESTROYED;
		1079
777	if (coro->flags & CF_RUNNING)	1080	if (coro->flags & CF_READY)
778	croak ("FATAL: tried to destroy currently running coroutine");	1081	{
		1082	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1083	/* alternative: look through all ready queues and remove the coro */
		1084	LOCK;
		1085	--coro_nready;
		1086	UNLOCK;
		1087	}
		1088	else
		1089	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
779		1090
780	if (coro->mainstack && coro->mainstack != main_mainstack)	1091	if (coro->mainstack && coro->mainstack != main_mainstack)
781	{	1092	{
782	struct coro temp;	1093	struct coro temp;
783		1094
784	SAVE ((&temp), TRANSFER_SAVE_ALL);	1095	if (coro->flags & CF_RUNNING)
785	LOAD (coro);	1096	croak ("FATAL: tried to destroy currently running coroutine");
786		1097
787	coro_destroy_stacks ();	1098	save_perl (aTHX_ &temp);
		1099	load_perl (aTHX_ coro);
788		1100
		1101	coro_destroy (aTHX_ coro);
		1102
789	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1103	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
790		1104
791	coro->mainstack = 0;	1105	coro->mainstack = 0;
792	}	1106	}
793		1107
794	cctx_destroy (coro->cctx);	1108	cctx_destroy (coro->cctx);
795	SvREFCNT_dec (coro->args);	1109	SvREFCNT_dec (coro->args);
796	Safefree (coro);	1110
		1111	if (coro->next) coro->next->prev = coro->prev;
		1112	if (coro->prev) coro->prev->next = coro->next;
		1113	if (coro == coro_first) coro_first = coro->next;
		1114
		1115	return 1;
797	}	1116	}
798		1117
799	static int	1118	static int
800	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1119	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
801	{	1120	{
802	struct coro *coro = (struct coro *)mg->mg_ptr;	1121	struct coro *coro = (struct coro *)mg->mg_ptr;
803	mg->mg_ptr = 0;	1122	mg->mg_ptr = 0;
804		1123
		1124	coro->hv = 0;
		1125
		1126	if (--coro->refcnt < 0)
		1127	{
805	coro_state_destroy (coro);	1128	coro_state_destroy (aTHX_ coro);
		1129	Safefree (coro);
		1130	}
806		1131
807	return 0;	1132	return 0;
808	}	1133	}
809		1134
810	static int	1135	static int
…		…
817	return 0;	1142	return 0;
818	}	1143	}
819		1144
820	static MGVTBL coro_state_vtbl = {	1145	static MGVTBL coro_state_vtbl = {
821	0, 0, 0, 0,	1146	0, 0, 0, 0,
822	coro_state_clear,	1147	coro_state_free,
823	0,	1148	0,
824	#ifdef MGf_DUP	1149	#ifdef MGf_DUP
825	coro_state_dup,	1150	coro_state_dup,
826	#else	1151	#else
827	# define MGf_DUP 0	1152	# define MGf_DUP 0
828	#endif	1153	#endif
829	};	1154	};
830		1155
831	static struct coro *
832	SvSTATE (SV *coro)
833	{
834	HV *stash;
835	MAGIC *mg;
836
837	if (SvROK (coro))
838	coro = SvRV (coro);
839
840	stash = SvSTASH (coro);
841	if (stash != coro_stash && stash != coro_state_stash)
842	{
843	/* very slow, but rare, check */
844	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
845	croak ("Coro::State object required");
846	}
847
848	mg = SvMAGIC (coro);
849	assert (mg->mg_type == PERL_MAGIC_ext);
850	return (struct coro *)mg->mg_ptr;
851	}
852
853	static void	1156	static void
854	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1157	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
855	{	1158	{
856	ta->prev = SvSTATE (prev);	1159	ta->prev = SvSTATE (prev_sv);
857	ta->next = SvSTATE (next);	1160	ta->next = SvSTATE (next_sv);
858	ta->flags = flags;	1161	TRANSFER_CHECK (*ta);
859	}	1162	}
860		1163
861	static void	1164	static void
862	api_transfer (SV *prev, SV *next, int flags)	1165	api_transfer (SV *prev_sv, SV *next_sv)
863	{	1166	{
864	dTHX;	1167	dTHX;
865	struct transfer_args ta;	1168	struct transfer_args ta;
866		1169
867	prepare_transfer (&ta, prev, next, flags);	1170	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
868	TRANSFER (ta);	1171	TRANSFER (ta);
869	}	1172	}
870		1173
871	/** Coro ********************************************************************/	1174	/** Coro ********************************************************************/
872		1175
873	#define PRIO_MAX 3
874	#define PRIO_HIGH 1
875	#define PRIO_NORMAL 0
876	#define PRIO_LOW -1
877	#define PRIO_IDLE -3
878	#define PRIO_MIN -4
879
880	/* for Coro.pm */
881	static GV *coro_current, *coro_idle;
882	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883	static int coro_nready;
884
885	static void	1176	static void
886	coro_enq (SV *coro_sv)	1177	coro_enq (pTHX_ SV *coro_sv)
887	{	1178	{
888	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1179	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
889	coro_nready++;
890	}	1180	}
891		1181
892	static SV *	1182	static SV *
893	coro_deq (int min_prio)	1183	coro_deq (pTHX_ int min_prio)
894	{	1184	{
895	int prio = PRIO_MAX - PRIO_MIN;	1185	int prio = PRIO_MAX - PRIO_MIN;
896		1186
897	min_prio -= PRIO_MIN;	1187	min_prio -= PRIO_MIN;
898	if (min_prio < 0)	1188	if (min_prio < 0)
899	min_prio = 0;	1189	min_prio = 0;
900		1190
901	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1191	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
902	if (AvFILLp (coro_ready [prio]) >= 0)	1192	if (AvFILLp (coro_ready [prio]) >= 0)
903	{
904	coro_nready--;
905	return av_shift (coro_ready [prio]);	1193	return av_shift (coro_ready [prio]);
906	}
907		1194
908	return 0;	1195	return 0;
909	}	1196	}
910		1197
911	static int	1198	static int
912	api_ready (SV *coro_sv)	1199	api_ready (SV *coro_sv)
913	{	1200	{
		1201	dTHX;
914	struct coro *coro;	1202	struct coro *coro;
915		1203
916	if (SvROK (coro_sv))	1204	if (SvROK (coro_sv))
917	coro_sv = SvRV (coro_sv);	1205	coro_sv = SvRV (coro_sv);
918		1206
919	coro = SvSTATE (coro_sv);	1207	coro = SvSTATE (coro_sv);
920		1208
921	if (coro->flags & CF_READY)	1209	if (coro->flags & CF_READY)
922	return 0;	1210	return 0;
923		1211
924	if (coro->flags & CF_RUNNING)
925	croak ("Coro::ready called on currently running coroutine");
926
927	coro->flags |= CF_READY;	1212	coro->flags |= CF_READY;
928		1213
929	LOCK;	1214	LOCK;
930	coro_enq (SvREFCNT_inc (coro_sv));	1215	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1216	++coro_nready;
931	UNLOCK;	1217	UNLOCK;
932		1218
933	return 1;	1219	return 1;
934	}	1220	}
935		1221
936	static int	1222	static int
937	api_is_ready (SV *coro_sv)	1223	api_is_ready (SV *coro_sv)
938	{	1224	{
		1225	dTHX;
939	return !!SvSTATE (coro_sv)->flags & CF_READY;	1226	return !!(SvSTATE (coro_sv)->flags & CF_READY);
940	}	1227	}
941		1228
942	static void	1229	static void
943	prepare_schedule (struct transfer_args *ta)	1230	prepare_schedule (pTHX_ struct transfer_args *ta)
944	{	1231	{
945	SV *current, *prev, *next;	1232	SV *prev_sv, *next_sv;
946
947	current = GvSV (coro_current);
948		1233
949	for (;;)	1234	for (;;)
950	{	1235	{
951	LOCK;	1236	LOCK;
952	next = coro_deq (PRIO_MIN);	1237	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1238
		1239	/* nothing to schedule: call the idle handler */
		1240	if (!next_sv)
		1241	{
		1242	dSP;
		1243	UNLOCK;
		1244
		1245	ENTER;
		1246	SAVETMPS;
		1247
		1248	PUSHMARK (SP);
		1249	PUTBACK;
		1250	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1251
		1252	FREETMPS;
		1253	LEAVE;
		1254	continue;
		1255	}
		1256
		1257	ta->next = SvSTATE (next_sv);
		1258
		1259	/* cannot transfer to destroyed coros, skip and look for next */
		1260	if (ta->next->flags & CF_DESTROYED)
		1261	{
		1262	UNLOCK;
		1263	SvREFCNT_dec (next_sv);
		1264	/* coro_nready is already taken care of by destroy */
		1265	continue;
		1266	}
		1267
		1268	--coro_nready;
953	UNLOCK;	1269	UNLOCK;
954
955	if (next)
956	break;	1270	break;
957
958	{
959	dSP;
960
961	ENTER;
962	SAVETMPS;
963
964	PUSHMARK (SP);
965	PUTBACK;
966	call_sv (GvSV (coro_idle), G_DISCARD);
967
968	FREETMPS;
969	LEAVE;
970	}	1271	}
971	}
972
973	prev = SvRV (current);
974	SvRV (current) = next;
975		1272
976	/* free this only after the transfer */	1273	/* free this only after the transfer */
		1274	prev_sv = SvRV (coro_current);
		1275	ta->prev = SvSTATE (prev_sv);
		1276	TRANSFER_CHECK (*ta);
		1277	assert (ta->next->flags & CF_READY);
		1278	ta->next->flags &= ~CF_READY;
		1279	SvRV_set (coro_current, next_sv);
		1280
977	LOCK;	1281	LOCK;
978	free_coro_mortal ();	1282	free_coro_mortal (aTHX);
		1283	coro_mortal = prev_sv;
979	UNLOCK;	1284	UNLOCK;
980	coro_mortal = prev;
981
982	ta->prev = SvSTATE (prev);
983	ta->next = SvSTATE (next);
984	ta->flags = TRANSFER_SAVE_ALL;
985
986	ta->next->flags &= ~CF_READY;
987	}	1285	}
988		1286
989	static void	1287	static void
990	prepare_cede (struct transfer_args *ta)	1288	prepare_cede (pTHX_ struct transfer_args *ta)
991	{	1289	{
992	api_ready (GvSV (coro_current));	1290	api_ready (coro_current);
993
994	prepare_schedule (ta);	1291	prepare_schedule (aTHX_ ta);
		1292	}
		1293
		1294	static int
		1295	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1296	{
		1297	if (coro_nready)
		1298	{
		1299	SV *prev = SvRV (coro_current);
		1300	prepare_schedule (aTHX_ ta);
		1301	api_ready (prev);
		1302	return 1;
		1303	}
		1304	else
		1305	return 0;
995	}	1306	}
996		1307
997	static void	1308	static void
998	api_schedule (void)	1309	api_schedule (void)
999	{	1310	{
1000	dTHX;	1311	dTHX;
1001	struct transfer_args ta;	1312	struct transfer_args ta;
1002		1313
1003	prepare_schedule (&ta);	1314	prepare_schedule (aTHX_ &ta);
1004	TRANSFER (ta);	1315	TRANSFER (ta);
1005	}	1316	}
1006		1317
1007	static void	1318	static int
1008	api_cede (void)	1319	api_cede (void)
1009	{	1320	{
1010	dTHX;	1321	dTHX;
1011	struct transfer_args ta;	1322	struct transfer_args ta;
1012		1323
1013	prepare_cede (&ta);	1324	prepare_cede (aTHX_ &ta);
		1325
		1326	if (ta.prev != ta.next)
		1327	{
1014	TRANSFER (ta);	1328	TRANSFER (ta);
		1329	return 1;
		1330	}
		1331	else
		1332	return 0;
1015	}	1333	}
1016		1334
		1335	static int
		1336	api_cede_notself (void)
		1337	{
		1338	dTHX;
		1339	struct transfer_args ta;
		1340
		1341	if (prepare_cede_notself (aTHX_ &ta))
		1342	{
		1343	TRANSFER (ta);
		1344	return 1;
		1345	}
		1346	else
		1347	return 0;
		1348	}
		1349
		1350	static void
		1351	api_trace (SV *coro_sv, int flags)
		1352	{
		1353	dTHX;
		1354	struct coro *coro = SvSTATE (coro_sv);
		1355
		1356	if (flags & CC_TRACE)
		1357	{
		1358	if (!coro->cctx)
		1359	coro->cctx = cctx_new ();
		1360	else if (!(coro->cctx->flags & CC_TRACE))
		1361	croak ("cannot enable tracing on coroutine with custom stack");
		1362
		1363	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1364	}
		1365	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1366	{
		1367	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1368
		1369	if (coro->flags & CF_RUNNING)
		1370	PL_runops = RUNOPS_DEFAULT;
		1371	else
		1372	coro->runops = RUNOPS_DEFAULT;
		1373	}
		1374	}
		1375
1017	MODULE = Coro::State PACKAGE = Coro::State	1376	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1018		1377
1019	PROTOTYPES: DISABLE	1378	PROTOTYPES: DISABLE
1020		1379
1021	BOOT:	1380	BOOT:
1022	{	1381	{
1023	#ifdef USE_ITHREADS	1382	#ifdef USE_ITHREADS
1024	MUTEX_INIT (&coro_mutex);	1383	MUTEX_INIT (&coro_mutex);
1025	#endif	1384	#endif
1026	BOOT_PAGESIZE;	1385	BOOT_PAGESIZE;
1027		1386
		1387	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1388
1028	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1389	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1029		1390
1030	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1391	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1031	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1392	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1032	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1393	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1394	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1033		1395
1034	main_mainstack = PL_mainstack;	1396	main_mainstack = PL_mainstack;
		1397	main_top_env = PL_top_env;
		1398
		1399	while (main_top_env->je_prev)
		1400	main_top_env = main_top_env->je_prev;
1035		1401
1036	coroapi.ver = CORO_API_VERSION;	1402	coroapi.ver = CORO_API_VERSION;
1037	coroapi.transfer = api_transfer;	1403	coroapi.transfer = api_transfer;
1038		1404
1039	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1405	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1046	struct coro *coro;	1412	struct coro *coro;
1047	HV *hv;	1413	HV *hv;
1048	int i;	1414	int i;
1049		1415
1050	Newz (0, coro, 1, struct coro);	1416	Newz (0, coro, 1, struct coro);
1051	coro->args = newAV ();	1417	coro->args = newAV ();
		1418	coro->flags = CF_NEW;
1052		1419
		1420	if (coro_first) coro_first->prev = coro;
		1421	coro->next = coro_first;
		1422	coro_first = coro;
		1423
1053	hv = newHV ();	1424	coro->hv = hv = newHV ();
1054	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1425	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1055	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1426	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1056		1427
1057	for (i = 1; i < items; i++)	1428	for (i = 1; i < items; i++)
1058	av_push (coro->args, newSVsv (ST (i)));	1429	av_push (coro->args, newSVsv (ST (i)));
1059	}	1430	}
1060	OUTPUT:	1431	OUTPUT:
1061	RETVAL	1432	RETVAL
1062		1433
		1434	# these not obviously related functions are all rolled into the same xs
		1435	# function to increase chances that they all will call transfer with the same
		1436	# stack offset
1063	void	1437	void
1064	_set_stacklevel (...)	1438	_set_stacklevel (...)
1065	ALIAS:	1439	ALIAS:
1066	Coro::State::transfer = 1	1440	Coro::State::transfer = 1
1067	Coro::schedule = 2	1441	Coro::schedule = 2
1068	Coro::cede = 3	1442	Coro::cede = 3
1069	Coro::Cont::yield = 4	1443	Coro::cede_notself = 4
1070	CODE:	1444	CODE:
1071	{	1445	{
1072	struct transfer_args ta;	1446	struct transfer_args ta;
1073		1447
1074	switch (ix)	1448	switch (ix)
1075	{	1449	{
1076	case 0:	1450	case 0:
1077	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1451	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1078	ta.next = 0;	1452	ta.next = 0;
1079	ta.flags = TRANSFER_SET_STACKLEVEL;
1080	break;	1453	break;
1081		1454
1082	case 1:	1455	case 1:
1083	if (items != 3)	1456	if (items != 2)
1084	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1457	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1085		1458
1086	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1459	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1087	break;	1460	break;
1088		1461
1089	case 2:	1462	case 2:
1090	prepare_schedule (&ta);	1463	prepare_schedule (aTHX_ &ta);
1091	break;	1464	break;
1092		1465
1093	case 3:	1466	case 3:
1094	prepare_cede (&ta);	1467	prepare_cede (aTHX_ &ta);
1095	break;	1468	break;
1096		1469
1097	case 4:	1470	case 4:
1098	{	1471	if (!prepare_cede_notself (aTHX_ &ta))
1099	SV *yieldstack;	1472	XSRETURN_EMPTY;
1100	SV *sv;
1101	AV *defav = GvAV (PL_defgv);
1102		1473
1103	yieldstack = *hv_fetch (
1104	(HV *)SvRV (GvSV (coro_current)),
1105	"yieldstack", sizeof ("yieldstack") - 1,
1106	0
1107	);
1108
1109	/* set up @_ -- ugly */
1110	av_clear (defav);
1111	av_fill (defav, items - 1);
1112	while (items--)
1113	av_store (defav, items, SvREFCNT_inc (ST(items)));
1114
1115	sv = av_pop ((AV *)SvRV (yieldstack));
1116	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1117	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1118	ta.flags = 0;
1119	SvREFCNT_dec (sv);
1120	}
1121	break;	1474	break;
1122
1123	}	1475	}
1124		1476
		1477	BARRIER;
1125	TRANSFER (ta);	1478	TRANSFER (ta);
1126	}
1127		1479
1128	void	1480	if (GIMME_V != G_VOID && ta.next != ta.prev)
1129	_clone_state_from (SV *dst, SV *src)	1481	XSRETURN_YES;
		1482	}
		1483
		1484	bool
		1485	_destroy (SV *coro_sv)
1130	CODE:	1486	CODE:
1131	{	1487	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1132	struct coro *coro_src = SvSTATE (src);	1488	OUTPUT:
1133		1489	RETVAL
1134	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1135
1136	++coro_src->refcnt;
1137	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1138	}
1139		1490
1140	void	1491	void
1141	_exit (code)	1492	_exit (code)
1142	int code	1493	int code
1143	PROTOTYPE: $	1494	PROTOTYPE: $
1144	CODE:	1495	CODE:
1145	_exit (code);	1496	_exit (code);
1146		1497
1147	int	1498	int
		1499	cctx_stacksize (int new_stacksize = 0)
		1500	CODE:
		1501	RETVAL = coro_stacksize;
		1502	if (new_stacksize)
		1503	coro_stacksize = new_stacksize;
		1504	OUTPUT:
		1505	RETVAL
		1506
		1507	int
1148	cctx_count ()	1508	cctx_count ()
1149	CODE:	1509	CODE:
1150	RETVAL = cctx_count;	1510	RETVAL = cctx_count;
1151	OUTPUT:	1511	OUTPUT:
1152	RETVAL	1512	RETVAL
…		…
1156	CODE:	1516	CODE:
1157	RETVAL = cctx_idle;	1517	RETVAL = cctx_idle;
1158	OUTPUT:	1518	OUTPUT:
1159	RETVAL	1519	RETVAL
1160		1520
		1521	void
		1522	list ()
		1523	PPCODE:
		1524	{
		1525	struct coro *coro;
		1526	for (coro = coro_first; coro; coro = coro->next)
		1527	if (coro->hv)
		1528	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1529	}
		1530
		1531	void
		1532	call (Coro::State coro, SV *coderef)
		1533	ALIAS:
		1534	eval = 1
		1535	CODE:
		1536	{
		1537	if (coro->mainstack)
		1538	{
		1539	struct coro temp;
		1540	Zero (&temp, 1, struct coro);
		1541
		1542	if (!(coro->flags & CF_RUNNING))
		1543	{
		1544	save_perl (aTHX_ &temp);
		1545	load_perl (aTHX_ coro);
		1546	}
		1547
		1548	{
		1549	dSP;
		1550	ENTER;
		1551	SAVETMPS;
		1552	PUSHMARK (SP);
		1553	PUTBACK;
		1554	if (ix)
		1555	eval_sv (coderef, 0);
		1556	else
		1557	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1558	SPAGAIN;
		1559	FREETMPS;
		1560	LEAVE;
		1561	PUTBACK;
		1562	}
		1563
		1564	if (!(coro->flags & CF_RUNNING))
		1565	{
		1566	save_perl (aTHX_ coro);
		1567	load_perl (aTHX_ &temp);
		1568	}
		1569	}
		1570	}
		1571
		1572	SV *
		1573	is_ready (Coro::State coro)
		1574	PROTOTYPE: $
		1575	ALIAS:
		1576	is_ready = CF_READY
		1577	is_running = CF_RUNNING
		1578	is_new = CF_NEW
		1579	is_destroyed = CF_DESTROYED
		1580	CODE:
		1581	RETVAL = boolSV (coro->flags & ix);
		1582	OUTPUT:
		1583	RETVAL
		1584
		1585	void
		1586	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1587
		1588	SV *
		1589	has_stack (Coro::State coro)
		1590	PROTOTYPE: $
		1591	CODE:
		1592	RETVAL = boolSV (!!coro->cctx);
		1593	OUTPUT:
		1594	RETVAL
		1595
		1596	int
		1597	is_traced (Coro::State coro)
		1598	PROTOTYPE: $
		1599	CODE:
		1600	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1601	OUTPUT:
		1602	RETVAL
		1603
		1604	IV
		1605	rss (Coro::State coro)
		1606	PROTOTYPE: $
		1607	ALIAS:
		1608	usecount = 1
		1609	CODE:
		1610	switch (ix)
		1611	{
		1612	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1613	case 1: RETVAL = coro->usecount; break;
		1614	}
		1615	OUTPUT:
		1616	RETVAL
		1617
		1618
1161	MODULE = Coro::State PACKAGE = Coro	1619	MODULE = Coro::State PACKAGE = Coro
1162		1620
1163	BOOT:	1621	BOOT:
1164	{	1622	{
1165	int i;	1623	int i;
		1624
		1625	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1626	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1627	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1628
		1629	coro_current = get_sv ("Coro::current", FALSE);
		1630	SvREADONLY_on (coro_current);
1166		1631
1167	coro_stash = gv_stashpv ("Coro", TRUE);	1632	coro_stash = gv_stashpv ("Coro", TRUE);
1168		1633
1169	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1634	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1170	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1635	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1171	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1636	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1172	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1637	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1173	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1638	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1174	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1639	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1175		1640
1176	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1177	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1178
1179	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1641	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1180	coro_ready[i] = newAV ();	1642	coro_ready[i] = newAV ();
1181		1643
1182	{	1644	{
1183	SV *sv = perl_get_sv("Coro::API", 1);	1645	SV *sv = perl_get_sv("Coro::API", 1);
1184		1646
1185	coroapi.schedule = api_schedule;	1647	coroapi.schedule = api_schedule;
1186	coroapi.cede = api_cede;	1648	coroapi.cede = api_cede;
		1649	coroapi.cede_notself = api_cede_notself;
1187	coroapi.ready = api_ready;	1650	coroapi.ready = api_ready;
1188	coroapi.is_ready = api_is_ready;	1651	coroapi.is_ready = api_is_ready;
1189	coroapi.nready = &coro_nready;	1652	coroapi.nready = &coro_nready;
1190	coroapi.current = coro_current;	1653	coroapi.current = coro_current;
1191		1654
1192	GCoroAPI = &coroapi;	1655	GCoroAPI = &coroapi;
1193	sv_setiv (sv, (IV)&coroapi);	1656	sv_setiv (sv, (IV)&coroapi);
1194	SvREADONLY_on (sv);	1657	SvREADONLY_on (sv);
1195	}	1658	}
1196	}	1659	}
		1660
		1661	void
		1662	_set_current (SV *current)
		1663	PROTOTYPE: $
		1664	CODE:
		1665	SvREFCNT_dec (SvRV (coro_current));
		1666	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1197		1667
1198	int	1668	int
1199	prio (Coro::State coro, int newprio = 0)	1669	prio (Coro::State coro, int newprio = 0)
1200	ALIAS:	1670	ALIAS:
1201	nice = 1	1671	nice = 1
…		…
1204	RETVAL = coro->prio;	1674	RETVAL = coro->prio;
1205		1675
1206	if (items > 1)	1676	if (items > 1)
1207	{	1677	{
1208	if (ix)	1678	if (ix)
1209	newprio += coro->prio;	1679	newprio = coro->prio - newprio;
1210		1680
1211	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1681	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1212	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1682	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1213		1683
1214	coro->prio = newprio;	1684	coro->prio = newprio;
1215	}	1685	}
1216	}	1686	}
		1687	OUTPUT:
		1688	RETVAL
1217		1689
1218	SV *	1690	SV *
1219	ready (SV *self)	1691	ready (SV *self)
1220	PROTOTYPE: $	1692	PROTOTYPE: $
1221	CODE:	1693	CODE:
1222	RETVAL = boolSV (api_ready (self));	1694	RETVAL = boolSV (api_ready (self));
1223	OUTPUT:	1695	OUTPUT:
1224	RETVAL	1696	RETVAL
1225		1697
1226	SV *
1227	is_ready (SV *self)
1228	PROTOTYPE: $
1229	CODE:
1230	RETVAL = boolSV (api_is_ready (self));
1231	OUTPUT:
1232	RETVAL
1233
1234	int	1698	int
1235	nready (...)	1699	nready (...)
1236	PROTOTYPE:	1700	PROTOTYPE:
1237	CODE:	1701	CODE:
1238	RETVAL = coro_nready;	1702	RETVAL = coro_nready;
1239	OUTPUT:	1703	OUTPUT:
1240	RETVAL	1704	RETVAL
1241		1705
		1706	# for async_pool speedup
		1707	void
		1708	_pool_1 (SV *cb)
		1709	CODE:
		1710	{
		1711	int i, len;
		1712	HV *hv = (HV *)SvRV (coro_current);
		1713	AV *defav = GvAV (PL_defgv);
		1714	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1715	AV *invoke_av;
		1716
		1717	if (!invoke)
		1718	croak ("\3terminate\2\n");
		1719
		1720	hv_store (hv, "desc", sizeof ("desc") - 1,
		1721	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1722
		1723	invoke_av = (AV *)SvRV (invoke);
		1724	len = av_len (invoke_av);
		1725
		1726	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1727
		1728	if (len > 0)
		1729	{
		1730	av_fill (defav, len - 1);
		1731	for (i = 0; i < len; ++i)
		1732	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1733	}
		1734
		1735	SvREFCNT_dec (invoke);
		1736	}
		1737
		1738	void
		1739	_pool_2 (SV *cb)
		1740	CODE:
		1741	{
		1742	struct coro *coro = SvSTATE (coro_current);
		1743
		1744	sv_setsv (cb, &PL_sv_undef);
		1745
		1746	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1747	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1748	croak ("\3terminate\2\n");
		1749
		1750	av_clear (GvAV (PL_defgv));
		1751	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1752	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1753
		1754	coro->prio = 0;
		1755
		1756	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1757	api_trace (coro_current, 0);
		1758
		1759	av_push (av_async_pool, newSVsv (coro_current));
		1760	}
		1761
		1762
1242	MODULE = Coro::State PACKAGE = Coro::AIO	1763	MODULE = Coro::State PACKAGE = Coro::AIO
1243		1764
1244	SV *	1765	SV *
1245	_get_state ()	1766	_get_state ()
1246	CODE:	1767	CODE:
1247	{	1768	{
1248	struct {	1769	struct io_state *data;
1249	int errorno;
1250	int laststype;
1251	int laststatval;
1252	Stat_t statcache;
1253	} data;
1254		1770
		1771	RETVAL = newSV (sizeof (struct io_state));
		1772	data = (struct io_state *)SvPVX (RETVAL);
		1773	SvCUR_set (RETVAL, sizeof (struct io_state));
		1774	SvPOK_only (RETVAL);
		1775
1255	data.errorno = errno;	1776	data->errorno = errno;
1256	data.laststype = PL_laststype;	1777	data->laststype = PL_laststype;
1257	data.laststatval = PL_laststatval;	1778	data->laststatval = PL_laststatval;
1258	data.statcache = PL_statcache;	1779	data->statcache = PL_statcache;
1259
1260	RETVAL = newSVpvn ((char *)&data, sizeof data);
1261	}	1780	}
1262	OUTPUT:	1781	OUTPUT:
1263	RETVAL	1782	RETVAL
1264		1783
1265	void	1784	void
1266	_set_state (char *data_)	1785	_set_state (char *data_)
1267	PROTOTYPE: $	1786	PROTOTYPE: $
1268	CODE:	1787	CODE:
1269	{	1788	{
1270	struct {	1789	struct io_state *data = (void *)data_;
1271	int errorno;
1272	int laststype;
1273	int laststatval;
1274	Stat_t statcache;
1275	} *data = (void *)data_;
1276		1790
1277	errno = data->errorno;	1791	errno = data->errorno;
1278	PL_laststype = data->laststype;	1792	PL_laststype = data->laststype;
1279	PL_laststatval = data->laststatval;	1793	PL_laststatval = data->laststatval;
1280	PL_statcache = data->statcache;	1794	PL_statcache = data->statcache;
1281	}	1795	}
		1796

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