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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.112 by root, Thu Nov 30 20:52:52 2006 UTC vs.
Revision 1.182 by root, Wed Oct 3 18:37:48 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
		139	/* async_pool helper stuff */
		140	static SV *sv_pool_rss;
		141	static SV *sv_pool_size;
		142	static AV *av_async_pool;
		143
108	static struct coro_cctx *cctx_first;	144	static struct coro_cctx *cctx_first;
109	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	};
110		155
111	/* this is a structure representing a c-level coroutine */	156	/* this is a structure representing a c-level coroutine */
112	typedef struct coro_cctx {	157	typedef struct coro_cctx {
113	struct coro_cctx *next;	158	struct coro_cctx *next;
114		159
115	/* the stack */	160	/* the stack */
116	void *sptr;	161	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	162	size_t ssize;
118		163
119	/* cpu state */	164	/* cpu state */
120	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 */
121	JMPENV *top_env;	167	JMPENV *top_env;
122	coro_context cctx;	168	coro_context cctx;
123		169
124	int inuse;
125
126	#if USE_VALGRIND	170	#if CORO_USE_VALGRIND
127	int valgrind_id;	171	int valgrind_id;
128	#endif	172	#endif
		173	unsigned char flags;
129	} coro_cctx;	174	} coro_cctx;
130		175
131	enum {	176	enum {
132	CF_RUNNING, /* coroutine is running */	177	CF_RUNNING = 0x0001, /* coroutine is running */
133	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 */
134	};	181	};
135		182
136	/* this is a structure representing a perl-level coroutine */	183	/* this is a structure representing a perl-level coroutine */
137	struct coro {	184	struct coro {
138	/* the c coroutine allocated to this perl coroutine, if any */	185	/* the c coroutine allocated to this perl coroutine, if any */
139	coro_cctx *cctx;	186	coro_cctx *cctx;
140		187
141	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
142	AV *args;	189	AV *args;
143	int refcnt;	190	int refcnt;
144	int flags;	191	int flags; /* CF_ flags */
145		192
146	/* optionally saved, might be zero */	193	/* optionally saved, might be zero */
147	AV *defav;	194	AV *defav; /* @_ */
148	SV *defsv;	195	SV *defsv; /* $_ */
149	SV *errsv;	196	SV *errsv; /* $@ */
		197	GV *deffh; /* default filehandle */
		198	SV *irssv; /* $/ */
		199	SV *irssv_sv; /* real $/ cache */
150		200
151	#define VAR(name,type) type name;	201	#define VAR(name,type) type name;
152	# include "state.h"	202	# include "state.h"
153	#undef VAR	203	#undef VAR
154		204
		205	/* statistics */
		206	int usecount; /* number of transfers to this coro */
		207
155	/* coro process data */	208	/* coro process data */
156	int prio;	209	int prio;
		210	//SV *throw;
		211
		212	/* async_pool */
		213	GV *asp_deffh;
		214
		215	/* linked list */
		216	struct coro *next, *prev;
		217	HV *hv; /* the perl hash associated with this coro, if any */
157	};	218	};
158		219
159	typedef struct coro *Coro__State;	220	typedef struct coro *Coro__State;
160	typedef struct coro *Coro__State_or_hashref;	221	typedef struct coro *Coro__State_or_hashref;
161		222
		223	/** Coro ********************************************************************/
		224
		225	#define PRIO_MAX 3
		226	#define PRIO_HIGH 1
		227	#define PRIO_NORMAL 0
		228	#define PRIO_LOW -1
		229	#define PRIO_IDLE -3
		230	#define PRIO_MIN -4
		231
		232	/* for Coro.pm */
		233	static SV *coro_current;
		234	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		235	static int coro_nready;
		236	static struct coro *coro_first;
		237
		238	/** lowlevel stuff **********************************************************/
		239
162	static AV *	240	static AV *
163	coro_clone_padlist (CV *cv)	241	coro_clone_padlist (pTHX_ CV *cv)
164	{	242	{
165	AV *padlist = CvPADLIST (cv);	243	AV *padlist = CvPADLIST (cv);
166	AV *newpadlist, *newpad;	244	AV *newpadlist, *newpad;
167		245
168	newpadlist = newAV ();	246	newpadlist = newAV ();
…		…
180		258
181	return newpadlist;	259	return newpadlist;
182	}	260	}
183		261
184	static void	262	static void
185	free_padlist (AV *padlist)	263	free_padlist (pTHX_ AV *padlist)
186	{	264	{
187	/* may be during global destruction */	265	/* may be during global destruction */
188	if (SvREFCNT (padlist))	266	if (SvREFCNT (padlist))
189	{	267	{
190	I32 i = AvFILLp (padlist);	268	I32 i = AvFILLp (padlist);
…		…
211	AV *padlist;	289	AV *padlist;
212	AV *av = (AV *)mg->mg_obj;	290	AV *av = (AV *)mg->mg_obj;
213		291
214	/* casting is fun. */	292	/* casting is fun. */
215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	293	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
216	free_padlist (padlist);	294	free_padlist (aTHX_ padlist);
217		295
218	SvREFCNT_dec (av);	296	SvREFCNT_dec (av);
219		297
220	return 0;	298	return 0;
221	}	299	}
…		…
229	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	307	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
230	? SvMAGIC (cv) \	308	? SvMAGIC (cv) \
231	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	309	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
232	: 0	310	: 0
233		311
		312	static struct coro *
		313	SvSTATE_ (pTHX_ SV *coro)
		314	{
		315	HV *stash;
		316	MAGIC *mg;
		317
		318	if (SvROK (coro))
		319	coro = SvRV (coro);
		320
		321	if (SvTYPE (coro) != SVt_PVHV)
		322	croak ("Coro::State object required");
		323
		324	stash = SvSTASH (coro);
		325	if (stash != coro_stash && stash != coro_state_stash)
		326	{
		327	/* very slow, but rare, check */
		328	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		329	croak ("Coro::State object required");
		330	}
		331
		332	mg = CORO_MAGIC (coro);
		333	return (struct coro *)mg->mg_ptr;
		334	}
		335
		336	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		337
234	/* the next two functions merely cache the padlists */	338	/* the next two functions merely cache the padlists */
235	static void	339	static void
236	get_padlist (CV *cv)	340	get_padlist (pTHX_ CV *cv)
237	{	341	{
238	MAGIC *mg = CORO_MAGIC (cv);	342	MAGIC *mg = CORO_MAGIC (cv);
239	AV *av;	343	AV *av;
240		344
241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	345	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	346	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	347	else
244	{	348	{
245	#if 0	349	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	350	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	351	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	352	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	353	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	354	SvREFCNT_dec (cp);
251	#else	355	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	356	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	357	#endif
254	}	358	}
255	}	359	}
256		360
257	static void	361	static void
258	put_padlist (CV *cv)	362	put_padlist (pTHX_ CV *cv)
259	{	363	{
260	MAGIC *mg = CORO_MAGIC (cv);	364	MAGIC *mg = CORO_MAGIC (cv);
261	AV *av;	365	AV *av;
262		366
263	if (!mg)	367	if (!mg)
…		…
274	av_extend (av, AvMAX (av) + 1);	378	av_extend (av, AvMAX (av) + 1);
275		379
276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	380	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277	}	381	}
278		382
279	#define SB do {	383	/** load & save, init *******************************************************/
280	#define SE } while (0)
281		384
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	385	static void
288	load_state(Coro__State c)	386	load_perl (pTHX_ Coro__State c)
289	{	387	{
290	#define VAR(name,type) PL_ ## name = c->name;	388	#define VAR(name,type) PL_ ## name = c->name;
291	# include "state.h"	389	# include "state.h"
292	#undef VAR	390	#undef VAR
293		391
294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	392	GvSV (PL_defgv) = c->defsv;
295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	393	GvAV (PL_defgv) = c->defav;
296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	394	GvSV (PL_errgv) = c->errsv;
		395	PL_defoutgv = c->deffh;
		396	PL_rs = c->irssv;
		397	GvSV (irsgv) = c->irssv_sv;
297		398
298	{	399	{
299	dSP;	400	dSP;
300	CV *cv;	401	CV *cv;
301		402
302	/* now do the ugly restore mess */	403	/* now do the ugly restore mess */
303	while ((cv = (CV *)POPs))	404	while ((cv = (CV *)POPs))
304	{	405	{
305	put_padlist (cv); /* mark this padlist as available */	406	put_padlist (aTHX_ cv); /* mark this padlist as available */
306	CvDEPTH (cv) = PTR2IV (POPs);	407	CvDEPTH (cv) = PTR2IV (POPs);
307	CvPADLIST (cv) = (AV *)POPs;	408	CvPADLIST (cv) = (AV *)POPs;
308	}	409	}
309		410
310	PUTBACK;	411	PUTBACK;
311	}	412	}
312	}	413	}
313		414
314	static void	415	static void
315	save_state(Coro__State c, int flags)	416	save_perl (pTHX_ Coro__State c)
316	{	417	{
317	{	418	{
318	dSP;	419	dSP;
319	I32 cxix = cxstack_ix;	420	I32 cxix = cxstack_ix;
320	PERL_CONTEXT *ccstk = cxstack;	421	PERL_CONTEXT *ccstk = cxstack;
…		…
323	/*	424	/*
324	* the worst thing you can imagine happens first - we have to save	425	* the worst thing you can imagine happens first - we have to save
325	* (and reinitialize) all cv's in the whole callchain :(	426	* (and reinitialize) all cv's in the whole callchain :(
326	*/	427	*/
327		428
328	PUSHs (Nullsv);	429	XPUSHs (Nullsv);
329	/* this loop was inspired by pp_caller */	430	/* this loop was inspired by pp_caller */
330	for (;;)	431	for (;;)
331	{	432	{
332	while (cxix >= 0)	433	while (cxix >= 0)
333	{	434	{
334	PERL_CONTEXT *cx = &ccstk[cxix--];	435	PERL_CONTEXT *cx = &ccstk[cxix--];
335		436
336	if (CxTYPE(cx) == CXt_SUB)	437	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
337	{	438	{
338	CV *cv = cx->blk_sub.cv;	439	CV *cv = cx->blk_sub.cv;
339		440
340	if (CvDEPTH (cv))	441	if (CvDEPTH (cv))
341	{	442	{
342	EXTEND (SP, 3);	443	EXTEND (SP, 3);
343
344	PUSHs ((SV *)CvPADLIST(cv));	444	PUSHs ((SV *)CvPADLIST (cv));
345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	445	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
346	PUSHs ((SV *)cv);	446	PUSHs ((SV *)cv);
347		447
348	CvDEPTH (cv) = 0;	448	CvDEPTH (cv) = 0;
349	get_padlist (cv);	449	get_padlist (aTHX_ cv);
350	}	450	}
351	}	451	}
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	}	452	}
361		453
362	if (top_si->si_type == PERLSI_MAIN)	454	if (top_si->si_type == PERLSI_MAIN)
363	break;	455	break;
364		456
365	top_si = top_si->si_prev;	457	top_si = top_si->si_prev;
366	ccstk = top_si->si_cxstack;	458	ccstk = top_si->si_cxstack;
367	cxix = top_si->si_cxix;	459	cxix = top_si->si_cxix;
368	}	460	}
369		461
370	PUTBACK;	462	PUTBACK;
371	}	463	}
372		464
373	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	465	c->defav = GvAV (PL_defgv);
374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	466	c->defsv = DEFSV;
375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	467	c->errsv = ERRSV;
		468	c->deffh = PL_defoutgv;
		469	c->irssv = PL_rs;
		470	c->irssv_sv = GvSV (irsgv);
376		471
377	#define VAR(name,type)c->name = PL_ ## name;	472	#define VAR(name,type)c->name = PL_ ## name;
378	# include "state.h"	473	# include "state.h"
379	#undef VAR	474	#undef VAR
380	}	475	}
…		…
383	* allocate various perl stacks. This is an exact copy	478	* allocate various perl stacks. This is an exact copy
384	* of perl.c:init_stacks, except that it uses less memory	479	* of perl.c:init_stacks, except that it uses less memory
385	* on the (sometimes correct) assumption that coroutines do	480	* on the (sometimes correct) assumption that coroutines do
386	* not usually need a lot of stackspace.	481	* not usually need a lot of stackspace.
387	*/	482	*/
		483	#if CORO_PREFER_PERL_FUNCTIONS
		484	# define coro_init_stacks init_stacks
		485	#else
388	static void	486	static void
389	coro_init_stacks ()	487	coro_init_stacks (pTHX)
390	{	488	{
391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	489	PL_curstackinfo = new_stackinfo(64, 6);
392	PL_curstackinfo->si_type = PERLSI_MAIN;	490	PL_curstackinfo->si_type = PERLSI_MAIN;
393	PL_curstack = PL_curstackinfo->si_stack;	491	PL_curstack = PL_curstackinfo->si_stack;
394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	492	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395		493
396	PL_stack_base = AvARRAY(PL_curstack);	494	PL_stack_base = AvARRAY(PL_curstack);
397	PL_stack_sp = PL_stack_base;	495	PL_stack_sp = PL_stack_base;
398	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	496	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399		497
400	New(50,PL_tmps_stack,96,SV*);	498	New(50,PL_tmps_stack,64,SV*);
401	PL_tmps_floor = -1;	499	PL_tmps_floor = -1;
402	PL_tmps_ix = -1;	500	PL_tmps_ix = -1;
403	PL_tmps_max = 96;	501	PL_tmps_max = 64;
404		502
405	New(54,PL_markstack,16,I32);	503	New(54,PL_markstack,16,I32);
406	PL_markstack_ptr = PL_markstack;	504	PL_markstack_ptr = PL_markstack;
407	PL_markstack_max = PL_markstack + 16;	505	PL_markstack_max = PL_markstack + 16;
408		506
…		…
412		510
413	New(54,PL_scopestack,16,I32);	511	New(54,PL_scopestack,16,I32);
414	PL_scopestack_ix = 0;	512	PL_scopestack_ix = 0;
415	PL_scopestack_max = 16;	513	PL_scopestack_max = 16;
416		514
417	New(54,PL_savestack,96,ANY);	515	New(54,PL_savestack,64,ANY);
418	PL_savestack_ix = 0;	516	PL_savestack_ix = 0;
419	PL_savestack_max = 96;	517	PL_savestack_max = 64;
420		518
421	#if !PERL_VERSION_ATLEAST (5,9,0)	519	#if !PERL_VERSION_ATLEAST (5,9,0)
422	New(54,PL_retstack,8,OP*);	520	New(54,PL_retstack,4,OP*);
423	PL_retstack_ix = 0;	521	PL_retstack_ix = 0;
424	PL_retstack_max = 8;	522	PL_retstack_max = 4;
425	#endif	523	#endif
426	}	524	}
		525	#endif
427		526
428	/*	527	/*
429	* destroy the stacks, the callchain etc...	528	* destroy the stacks, the callchain etc...
430	*/	529	*/
431	static void	530	static void
432	coro_destroy_stacks ()	531	coro_destroy_stacks (pTHX)
433	{	532	{
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)	533	while (PL_curstackinfo->si_next)
446	PL_curstackinfo = PL_curstackinfo->si_next;	534	PL_curstackinfo = PL_curstackinfo->si_next;
447		535
448	while (PL_curstackinfo)	536	while (PL_curstackinfo)
449	{	537	{
450	PERL_SI *p = PL_curstackinfo->si_prev;	538	PERL_SI *p = PL_curstackinfo->si_prev;
451		539
452	{ /*D*//*remove*/
453	dSP;
454	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455	PUTBACK; /* possibly superfluous */
456	}
457
458	if (!IN_DESTRUCT)	540	if (!IN_DESTRUCT)
459	{
460	dounwind (-1);/*D*//*remove*/
461	SvREFCNT_dec (PL_curstackinfo->si_stack);	541	SvREFCNT_dec (PL_curstackinfo->si_stack);
462	}
463		542
464	Safefree (PL_curstackinfo->si_cxstack);	543	Safefree (PL_curstackinfo->si_cxstack);
465	Safefree (PL_curstackinfo);	544	Safefree (PL_curstackinfo);
466	PL_curstackinfo = p;	545	PL_curstackinfo = p;
467	}	546	}
…		…
473	#if !PERL_VERSION_ATLEAST (5,9,0)	552	#if !PERL_VERSION_ATLEAST (5,9,0)
474	Safefree (PL_retstack);	553	Safefree (PL_retstack);
475	#endif	554	#endif
476	}	555	}
477		556
478	static void	557	static size_t
479	setup_coro (struct coro *coro)	558	coro_rss (pTHX_ struct coro *coro)
		559	{
		560	size_t rss = sizeof (coro);
		561
		562	if (coro->mainstack)
		563	{
		564	if (coro->flags & CF_RUNNING)
		565	{
		566	#define VAR(name,type)coro->name = PL_ ## name;
		567	# include "state.h"
		568	#undef VAR
		569	}
		570
		571	rss += sizeof (coro->curstackinfo);
		572	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		573	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		574	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		575	rss += coro->tmps_max * sizeof (SV *);
		576	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		577	rss += coro->scopestack_max * sizeof (I32);
		578	rss += coro->savestack_max * sizeof (ANY);
		579
		580	#if !PERL_VERSION_ATLEAST (5,9,0)
		581	rss += coro->retstack_max * sizeof (OP *);
		582	#endif
		583	}
		584
		585	return rss;
		586	}
		587
		588	/** coroutine stack handling ************************************************/
		589
		590	static void
		591	coro_setup (pTHX_ struct coro *coro)
480	{	592	{
481	/*	593	/*
482	* emulate part of the perl startup here.	594	* emulate part of the perl startup here.
483	*/	595	*/
484
485	coro_init_stacks ();	596	coro_init_stacks (aTHX);
486		597
		598	PL_runops = RUNOPS_DEFAULT;
		599	PL_curcop = &PL_compiling;
		600	PL_in_eval = EVAL_NULL;
487	PL_curcop = 0;	601	PL_comppad = 0;
488	PL_in_eval = 0;
489	PL_curpm = 0;	602	PL_curpm = 0;
		603	PL_localizing = 0;
		604	PL_dirty = 0;
		605	PL_restartop = 0;
		606
		607	GvSV (PL_defgv) = NEWSV (0, 0);
		608	GvAV (PL_defgv) = coro->args; coro->args = 0;
		609	GvSV (PL_errgv) = NEWSV (0, 0);
		610	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		611	PL_rs = newSVsv (GvSV (irsgv));
		612
		613	{
		614	IO *io = newIO ();
		615	PL_defoutgv = newGVgen ("Coro");
		616	GvIOp(PL_defoutgv) = io;
		617	IoTYPE (io) = IoTYPE_WRONLY;
		618	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		619	IoFLAGS (io) |= IOf_FLUSH;
		620	}
490		621
491	{	622	{
492	dSP;	623	dSP;
493	LOGOP myop;	624	LOGOP myop;
494		625
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);	626	Zero (&myop, 1, LOGOP);
502	myop.op_next = Nullop;	627	myop.op_next = Nullop;
503	myop.op_flags = OPf_WANT_VOID;	628	myop.op_flags = OPf_WANT_VOID;
504		629
		630	PUSHMARK (SP);
		631	XPUSHs (av_shift (GvAV (PL_defgv)));
		632	PUTBACK;
505	PL_op = (OP *)&myop;	633	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);	634	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511	SPAGAIN;	635	SPAGAIN;
512
513	ENTER; /* necessary e.g. for dounwind */
514	}	636	}
515	}
516		637
		638	ENTER; /* necessary e.g. for dounwind */
		639	}
		640
517	static void	641	static void
		642	coro_destroy (pTHX_ struct coro *coro)
		643	{
		644	if (!IN_DESTRUCT)
		645	{
		646	/* restore all saved variables and stuff */
		647	LEAVE_SCOPE (0);
		648	assert (PL_tmps_floor == -1);
		649
		650	/* free all temporaries */
		651	FREETMPS;
		652	assert (PL_tmps_ix == -1);
		653
		654	/* unwind all extra stacks */
		655	POPSTACK_TO (PL_mainstack);
		656
		657	/* unwind main stack */
		658	dounwind (-1);
		659	}
		660
		661	SvREFCNT_dec (GvSV (PL_defgv));
		662	SvREFCNT_dec (GvAV (PL_defgv));
		663	SvREFCNT_dec (GvSV (PL_errgv));
		664	SvREFCNT_dec (PL_defoutgv);
		665	SvREFCNT_dec (PL_rs);
		666	SvREFCNT_dec (GvSV (irsgv));
		667
		668	SvREFCNT_dec (coro->asp_deffh);
		669	//SvREFCNT_dec (coro->throw);
		670
		671	coro_destroy_stacks (aTHX);
		672	}
		673
		674	static void
518	free_coro_mortal ()	675	free_coro_mortal (pTHX)
519	{	676	{
520	if (coro_mortal)	677	if (coro_mortal)
521	{	678	{
522	SvREFCNT_dec (coro_mortal);	679	SvREFCNT_dec (coro_mortal);
523	coro_mortal = 0;	680	coro_mortal = 0;
524	}	681	}
525	}	682	}
526		683
		684	static int
		685	runops_trace (pTHX)
		686	{
		687	COP *oldcop = 0;
		688	int oldcxix = -2;
		689	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		690	coro_cctx *cctx = coro->cctx;
		691
		692	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		693	{
		694	PERL_ASYNC_CHECK ();
		695
		696	if (cctx->flags & CC_TRACE_ALL)
		697	{
		698	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		699	{
		700	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		701	SV **bot, **top;
		702	AV *av = newAV (); /* return values */
		703	SV **cb;
		704	dSP;
		705
		706	GV *gv = CvGV (cx->blk_sub.cv);
		707	SV *fullname = sv_2mortal (newSV (0));
		708	if (isGV (gv))
		709	gv_efullname3 (fullname, gv, 0);
		710
		711	bot = PL_stack_base + cx->blk_oldsp + 1;
		712	top = cx->blk_gimme == G_ARRAY ? SP + 1
		713	: cx->blk_gimme == G_SCALAR ? bot + 1
		714	: bot;
		715
		716	while (bot < top)
		717	av_push (av, SvREFCNT_inc (*bot++));
		718
		719	PL_runops = RUNOPS_DEFAULT;
		720	ENTER;
		721	SAVETMPS;
		722	EXTEND (SP, 3);
		723	PUSHMARK (SP);
		724	PUSHs (&PL_sv_no);
		725	PUSHs (fullname);
		726	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		727	PUTBACK;
		728	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		729	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		730	SPAGAIN;
		731	FREETMPS;
		732	LEAVE;
		733	PL_runops = runops_trace;
		734	}
		735
		736	if (oldcop != PL_curcop)
		737	{
		738	oldcop = PL_curcop;
		739
		740	if (PL_curcop != &PL_compiling)
		741	{
		742	SV **cb;
		743
		744	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		745	{
		746	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		747
		748	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		749	{
		750	runops_proc_t old_runops = PL_runops;
		751	dSP;
		752	GV *gv = CvGV (cx->blk_sub.cv);
		753	SV *fullname = sv_2mortal (newSV (0));
		754
		755	if (isGV (gv))
		756	gv_efullname3 (fullname, gv, 0);
		757
		758	PL_runops = RUNOPS_DEFAULT;
		759	ENTER;
		760	SAVETMPS;
		761	EXTEND (SP, 3);
		762	PUSHMARK (SP);
		763	PUSHs (&PL_sv_yes);
		764	PUSHs (fullname);
		765	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		766	PUTBACK;
		767	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		768	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		769	SPAGAIN;
		770	FREETMPS;
		771	LEAVE;
		772	PL_runops = runops_trace;
		773	}
		774
		775	oldcxix = cxstack_ix;
		776	}
		777
		778	if (cctx->flags & CC_TRACE_LINE)
		779	{
		780	dSP;
		781
		782	PL_runops = RUNOPS_DEFAULT;
		783	ENTER;
		784	SAVETMPS;
		785	EXTEND (SP, 3);
		786	PL_runops = RUNOPS_DEFAULT;
		787	PUSHMARK (SP);
		788	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		789	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		790	PUTBACK;
		791	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		792	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		793	SPAGAIN;
		794	FREETMPS;
		795	LEAVE;
		796	PL_runops = runops_trace;
		797	}
		798	}
		799	}
		800	}
		801	}
		802
		803	TAINT_NOT;
		804	return 0;
		805	}
		806
		807	/* inject a fake call to Coro::State::_cctx_init into the execution */
		808	/* _cctx_init should be careful, as it could be called at almost any time */
		809	/* during execution of a perl program */
527	static void NOINLINE	810	static void NOINLINE
528	prepare_cctx (coro_cctx *cctx)	811	prepare_cctx (pTHX_ coro_cctx *cctx)
529	{	812	{
530	dSP;	813	dSP;
531	LOGOP myop;	814	LOGOP myop;
532		815
		816	PL_top_env = &PL_start_env;
		817
		818	if (cctx->flags & CC_TRACE)
		819	PL_runops = runops_trace;
		820
533	Zero (&myop, 1, LOGOP);	821	Zero (&myop, 1, LOGOP);
534	myop.op_next = PL_op;	822	myop.op_next = PL_op;
535	myop.op_flags = OPf_WANT_VOID;	823	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
536
537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538		824
539	PUSHMARK (SP);	825	PUSHMARK (SP);
		826	EXTEND (SP, 2);
		827	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	828	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541	PUTBACK;	829	PUTBACK;
		830	PL_op = (OP *)&myop;
542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	831	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543	SPAGAIN;	832	SPAGAIN;
544	}	833	}
545		834
		835	/*
		836	* this is a _very_ stripped down perl interpreter ;)
		837	*/
546	static void	838	static void
547	coro_run (void *arg)	839	coro_run (void *arg)
548	{	840	{
		841	dTHX;
		842
549	/* coro_run is the alternative epilogue of transfer() */	843	/* coro_run is the alternative tail of transfer(), so unlock here. */
550	UNLOCK;	844	UNLOCK;
551		845
		846	/* we now skip the entersub that lead to transfer() */
		847	PL_op = PL_op->op_next;
		848
		849	/* inject a fake subroutine call to cctx_init */
		850	prepare_cctx (aTHX_ (coro_cctx *)arg);
		851
		852	/* somebody or something will hit me for both perl_run and PL_restartop */
		853	PL_restartop = PL_op;
		854	perl_run (PL_curinterp);
		855
552	/*	856	/*
553	* this is a _very_ stripped down perl interpreter ;)	857	* If perl-run returns we assume exit() was being called or the coro
		858	* fell off the end, which seems to be the only valid (non-bug)
		859	* reason for perl_run to return. We try to exit by jumping to the
		860	* bootstrap-time "top" top_env, as we cannot restore the "main"
		861	* coroutine as Coro has no such concept
554	*/	862	*/
555	PL_top_env = &PL_start_env;	863	PL_top_env = main_top_env;
556		864	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	}	865	}
566		866
567	static coro_cctx *	867	static coro_cctx *
568	cctx_new ()	868	cctx_new ()
569	{	869	{
570	coro_cctx *cctx;	870	coro_cctx *cctx;
		871	void *stack_start;
		872	size_t stack_size;
571		873
572	++cctx_count;	874	++cctx_count;
573		875
574	New (0, cctx, 1, coro_cctx);	876	Newz (0, cctx, 1, coro_cctx);
575		877
576	#if HAVE_MMAP	878	#if HAVE_MMAP
577		879
578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	880	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579	/* mmap suppsedly does allocate-on-write for us */	881	/* 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);	882	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
581		883
582	if (cctx->sptr == (void *)-1)	884	if (cctx->sptr != (void *)-1)
583	{
584	perror ("FATAL: unable to mmap stack for coroutine");
585	_exit (EXIT_FAILURE);
586	}	885	{
587
588	# if STACKGUARD	886	# if CORO_STACKGUARD
589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	887	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
590	# endif	888	# endif
		889	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		890	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		891	cctx->flags |= CC_MAPPED;
		892	}
		893	else
		894	#endif
		895	{
		896	cctx->ssize = coro_stacksize * (long)sizeof (long);
		897	New (0, cctx->sptr, coro_stacksize, long);
591		898
592	#else
593
594	cctx->ssize = STACKSIZE * (long)sizeof (long);
595	New (0, cctx->sptr, STACKSIZE, long);
596
597	if (!cctx->sptr)	899	if (!cctx->sptr)
598	{	900	{
599	perror ("FATAL: unable to malloc stack for coroutine");	901	perror ("FATAL: unable to allocate stack for coroutine");
600	_exit (EXIT_FAILURE);	902	_exit (EXIT_FAILURE);
601	}	903	}
602		904
603	#endif	905	stack_start = cctx->sptr;
		906	stack_size = cctx->ssize;
		907	}
604		908
605	#if USE_VALGRIND	909	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);	910	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
613		911
614	return cctx;	912	return cctx;
615	}	913	}
616		914
617	static void	915	static void
618	cctx_free (coro_cctx *cctx)	916	cctx_destroy (coro_cctx *cctx)
619	{	917	{
620	if (!cctx)	918	if (!cctx)
621	return;	919	return;
622		920
623	--cctx_count;	921	--cctx_count;
624		922
625	#if USE_VALGRIND	923	#if CORO_USE_VALGRIND
626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	924	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627	#endif	925	#endif
628		926
629	#if HAVE_MMAP	927	#if HAVE_MMAP
		928	if (cctx->flags & CC_MAPPED)
630	munmap (cctx->sptr, cctx->ssize);	929	munmap (cctx->sptr, cctx->ssize);
631	#else	930	else
		931	#endif
632	Safefree (cctx->sptr);	932	Safefree (cctx->sptr);
633	#endif
634		933
635	Safefree (cctx);	934	Safefree (cctx);
636	}	935	}
637		936
638	static coro_cctx *	937	static coro_cctx *
639	cctx_get ()	938	cctx_get (pTHX)
640	{	939	{
641	coro_cctx *cctx;
642
643	if (cctx_first)	940	while (cctx_first)
644	{	941	{
		942	coro_cctx *cctx = cctx_first;
		943	cctx_first = cctx->next;
645	--cctx_idle;	944	--cctx_idle;
646	cctx = cctx_first;	945
647	cctx_first = cctx->next;	946	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
648	}	947	return cctx;
649	else	948
650	{	949	cctx_destroy (cctx);
651	cctx = cctx_new ();
652	PL_op = PL_op->op_next;
653	}	950	}
654		951
655	return cctx;	952	return cctx_new ();
656	}	953	}
657		954
658	static void	955	static void
659	cctx_put (coro_cctx *cctx)	956	cctx_put (coro_cctx *cctx)
660	{	957	{
		958	/* free another cctx if overlimit */
		959	if (cctx_idle >= MAX_IDLE_CCTX)
		960	{
		961	coro_cctx *first = cctx_first;
		962	cctx_first = first->next;
		963	--cctx_idle;
		964
		965	cctx_destroy (first);
		966	}
		967
661	++cctx_idle;	968	++cctx_idle;
662	cctx->next = cctx_first;	969	cctx->next = cctx_first;
663	cctx_first = cctx;	970	cctx_first = cctx;
664	}	971	}
665		972
666	/* never call directly, always through the coro_state_transfer global variable */	973	/** coroutine switching *****************************************************/
		974
667	static void NOINLINE	975	static void NOINLINE
		976	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		977	{
		978	if (prev != next)
		979	{
		980	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		981	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		982
		983	if (next->flags & CF_RUNNING)
		984	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		985
		986	if (next->flags & CF_DESTROYED)
		987	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		988
		989	if (PL_lex_state != LEX_NOTPARSING)
		990	croak ("Coro::State::transfer called while parsing, but this is not supported");
		991	}
		992	}
		993
		994	/* always use the TRANSFER macro */
		995	static void NOINLINE
668	transfer (struct coro *prev, struct coro *next, int flags)	996	transfer (pTHX_ struct coro *prev, struct coro *next)
669	{	997	{
670	dSTACKLEVEL;	998	dSTACKLEVEL;
671		999
672	/* sometimes transfer is only called to set idle_sp */	1000	/* sometimes transfer is only called to set idle_sp */
673	if (flags == TRANSFER_SET_STACKLEVEL)	1001	if (!next)
		1002	{
674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1003	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1004	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1005	}
675	else if (prev != next)	1006	else if (prev != next)
676	{	1007	{
677	coro_cctx *prev__cctx;	1008	coro_cctx *prev__cctx;
678		1009
679	if (!prev->cctx)	1010	if (prev->flags & CF_NEW)
680	{	1011	{
681	/* create a new empty context */	1012	/* create a new empty context */
682	Newz (0, prev->cctx, 1, coro_cctx);	1013	Newz (0, prev->cctx, 1, coro_cctx);
683	prev->cctx->inuse = 1;	1014	prev->flags &= ~CF_NEW;
684	prev->flags |= CF_RUNNING;	1015	prev->flags |= CF_RUNNING;
685	}	1016	}
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		1017
693	prev->flags &= ~CF_RUNNING;	1018	prev->flags &= ~CF_RUNNING;
694	next->flags |= CF_RUNNING;	1019	next->flags |= CF_RUNNING;
695		1020
696	LOCK;	1021	LOCK;
697		1022
698	if (next->mainstack)	1023	if (next->flags & CF_NEW)
699	{	1024	{
700	/* coroutine already started */	1025	/* need to start coroutine */
701	SAVE (prev, flags);	1026	next->flags &= ~CF_NEW;
702	LOAD (next);	1027	/* first get rid of the old state */
		1028	save_perl (aTHX_ prev);
		1029	/* setup coroutine call */
		1030	coro_setup (aTHX_ next);
703	}	1031	}
704	else	1032	else
705	{	1033	{
706	/* need to start coroutine */	1034	/* coroutine already started */
707	/* first get rid of the old state */	1035	save_perl (aTHX_ prev);
708	SAVE (prev, -1);	1036	load_perl (aTHX_ next);
709	/* setup coroutine call */
710	setup_coro (next);
711	/* need a new stack */
712	assert (!next->stack);
713	}	1037	}
714		1038
715	prev__cctx = prev->cctx;	1039	prev__cctx = prev->cctx;
716		1040
717	/* possibly "free" the cctx */	1041	/* possibly "free" the cctx */
718	if (prev__cctx->idle_sp == STACKLEVEL)	1042	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
719	{	1043	{
720	assert (PL_top_env == prev__cctx->top_env);	1044	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1045	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1046
		1047	prev->cctx = 0;
721		1048
722	cctx_put (prev__cctx);	1049	cctx_put (prev__cctx);
723	prev->cctx = 0;
724	}	1050	}
725		1051
		1052	++next->usecount;
		1053
726	if (!next->cctx)	1054	if (!next->cctx)
727	next->cctx = cctx_get ();	1055	next->cctx = cctx_get (aTHX);
728		1056
729	if (prev__cctx != next->cctx)	1057	if (prev__cctx != next->cctx)
730	{	1058	{
731	assert ( prev__cctx->inuse);
732	assert (!next->cctx->inuse);
733
734	prev__cctx->inuse = 0;
735	next->cctx->inuse = 1;
736
737	prev__cctx->top_env = PL_top_env;	1059	prev__cctx->top_env = PL_top_env;
738	PL_top_env = next->cctx->top_env;	1060	PL_top_env = next->cctx->top_env;
739	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1061	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
740	}	1062	}
741		1063
742	free_coro_mortal ();	1064	free_coro_mortal (aTHX);
743
744	UNLOCK;	1065	UNLOCK;
745	}	1066	}
746	}	1067	}
747		1068
748	struct transfer_args	1069	struct transfer_args
749	{	1070	{
750	struct coro *prev, *next;	1071	struct coro *prev, *next;
751	int flags;
752	};	1072	};
753		1073
754	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1074	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1075	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
755		1076
		1077	/** high level stuff ********************************************************/
		1078
756	static void	1079	static int
757	coro_state_destroy (struct coro *coro)	1080	coro_state_destroy (pTHX_ struct coro *coro)
758	{	1081	{
759	if (coro->refcnt--)	1082	if (coro->flags & CF_DESTROYED)
760	return;	1083	return 0;
761		1084
		1085	coro->flags |= CF_DESTROYED;
		1086
762	if (coro->flags & CF_RUNNING)	1087	if (coro->flags & CF_READY)
763	croak ("FATAL: tried to destroy currently running coroutine");	1088	{
		1089	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1090	/* alternative: look through all ready queues and remove the coro */
		1091	LOCK;
		1092	--coro_nready;
		1093	UNLOCK;
		1094	}
		1095	else
		1096	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
764		1097
765	if (coro->mainstack && coro->mainstack != main_mainstack)	1098	if (coro->mainstack && coro->mainstack != main_mainstack)
766	{	1099	{
767	struct coro temp;	1100	struct coro temp;
768		1101
769	SAVE ((&temp), TRANSFER_SAVE_ALL);	1102	if (coro->flags & CF_RUNNING)
770	LOAD (coro);	1103	croak ("FATAL: tried to destroy currently running coroutine");
771		1104
772	coro_destroy_stacks ();	1105	save_perl (aTHX_ &temp);
		1106	load_perl (aTHX_ coro);
773		1107
		1108	coro_destroy (aTHX_ coro);
		1109
774	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1110	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
775		1111
776	coro->mainstack = 0;	1112	coro->mainstack = 0;
777	}	1113	}
778		1114
779	cctx_free (coro->cctx);	1115	cctx_destroy (coro->cctx);
780	SvREFCNT_dec (coro->args);	1116	SvREFCNT_dec (coro->args);
781	Safefree (coro);	1117
		1118	if (coro->next) coro->next->prev = coro->prev;
		1119	if (coro->prev) coro->prev->next = coro->next;
		1120	if (coro == coro_first) coro_first = coro->next;
		1121
		1122	return 1;
782	}	1123	}
783		1124
784	static int	1125	static int
785	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1126	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
786	{	1127	{
787	struct coro *coro = (struct coro *)mg->mg_ptr;	1128	struct coro *coro = (struct coro *)mg->mg_ptr;
788	mg->mg_ptr = 0;	1129	mg->mg_ptr = 0;
789		1130
		1131	coro->hv = 0;
		1132
		1133	if (--coro->refcnt < 0)
		1134	{
790	coro_state_destroy (coro);	1135	coro_state_destroy (aTHX_ coro);
		1136	Safefree (coro);
		1137	}
791		1138
792	return 0;	1139	return 0;
793	}	1140	}
794		1141
795	static int	1142	static int
…		…
802	return 0;	1149	return 0;
803	}	1150	}
804		1151
805	static MGVTBL coro_state_vtbl = {	1152	static MGVTBL coro_state_vtbl = {
806	0, 0, 0, 0,	1153	0, 0, 0, 0,
807	coro_state_clear,	1154	coro_state_free,
808	0,	1155	0,
809	#ifdef MGf_DUP	1156	#ifdef MGf_DUP
810	coro_state_dup,	1157	coro_state_dup,
811	#else	1158	#else
812	# define MGf_DUP 0	1159	# define MGf_DUP 0
813	#endif	1160	#endif
814	};	1161	};
815		1162
816	static struct coro *
817	SvSTATE (SV *coro)
818	{
819	HV *stash;
820	MAGIC *mg;
821
822	if (SvROK (coro))
823	coro = SvRV (coro);
824
825	stash = SvSTASH (coro);
826	if (stash != coro_stash && stash != coro_state_stash)
827	{
828	/* very slow, but rare, check */
829	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
830	croak ("Coro::State object required");
831	}
832
833	mg = SvMAGIC (coro);
834	assert (mg->mg_type == PERL_MAGIC_ext);
835	return (struct coro *)mg->mg_ptr;
836	}
837
838	static void	1163	static void
839	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1164	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
840	{	1165	{
841	ta->prev = SvSTATE (prev);	1166	ta->prev = SvSTATE (prev_sv);
842	ta->next = SvSTATE (next);	1167	ta->next = SvSTATE (next_sv);
843	ta->flags = flags;	1168	TRANSFER_CHECK (*ta);
844	}	1169	}
845		1170
846	static void	1171	static void
847	api_transfer (SV *prev, SV *next, int flags)	1172	api_transfer (SV *prev_sv, SV *next_sv)
848	{	1173	{
849	dTHX;	1174	dTHX;
850	struct transfer_args ta;	1175	struct transfer_args ta;
851		1176
852	prepare_transfer (&ta, prev, next, flags);	1177	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
853	TRANSFER (ta);	1178	TRANSFER (ta);
854	}	1179	}
855		1180
856	/** Coro ********************************************************************/	1181	/** Coro ********************************************************************/
857		1182
858	#define PRIO_MAX 3
859	#define PRIO_HIGH 1
860	#define PRIO_NORMAL 0
861	#define PRIO_LOW -1
862	#define PRIO_IDLE -3
863	#define PRIO_MIN -4
864
865	/* for Coro.pm */
866	static GV *coro_current, *coro_idle;
867	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
868	static int coro_nready;
869
870	static void	1183	static void
871	coro_enq (SV *coro_sv)	1184	coro_enq (pTHX_ SV *coro_sv)
872	{	1185	{
873	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1186	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
874	coro_nready++;
875	}	1187	}
876		1188
877	static SV *	1189	static SV *
878	coro_deq (int min_prio)	1190	coro_deq (pTHX_ int min_prio)
879	{	1191	{
880	int prio = PRIO_MAX - PRIO_MIN;	1192	int prio = PRIO_MAX - PRIO_MIN;
881		1193
882	min_prio -= PRIO_MIN;	1194	min_prio -= PRIO_MIN;
883	if (min_prio < 0)	1195	if (min_prio < 0)
884	min_prio = 0;	1196	min_prio = 0;
885		1197
886	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1198	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
887	if (AvFILLp (coro_ready [prio]) >= 0)	1199	if (AvFILLp (coro_ready [prio]) >= 0)
888	{
889	coro_nready--;
890	return av_shift (coro_ready [prio]);	1200	return av_shift (coro_ready [prio]);
891	}
892		1201
893	return 0;	1202	return 0;
894	}	1203	}
895		1204
896	static int	1205	static int
897	api_ready (SV *coro_sv)	1206	api_ready (SV *coro_sv)
898	{	1207	{
		1208	dTHX;
899	struct coro *coro;	1209	struct coro *coro;
900		1210
901	if (SvROK (coro_sv))	1211	if (SvROK (coro_sv))
902	coro_sv = SvRV (coro_sv);	1212	coro_sv = SvRV (coro_sv);
903		1213
904	coro = SvSTATE (coro_sv);	1214	coro = SvSTATE (coro_sv);
905		1215
906	if (coro->flags & CF_READY)	1216	if (coro->flags & CF_READY)
907	return 0;	1217	return 0;
908		1218
909	if (coro->flags & CF_RUNNING)
910	croak ("Coro::ready called on currently running coroutine");
911
912	coro->flags |= CF_READY;	1219	coro->flags |= CF_READY;
913		1220
914	LOCK;	1221	LOCK;
915	coro_enq (SvREFCNT_inc (coro_sv));	1222	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1223	++coro_nready;
916	UNLOCK;	1224	UNLOCK;
917		1225
918	return 1;	1226	return 1;
919	}	1227	}
920		1228
921	static int	1229	static int
922	api_is_ready (SV *coro_sv)	1230	api_is_ready (SV *coro_sv)
923	{	1231	{
		1232	dTHX;
924	return !!SvSTATE (coro_sv)->flags & CF_READY;	1233	return !!(SvSTATE (coro_sv)->flags & CF_READY);
925	}	1234	}
926		1235
927	static void	1236	static void
928	prepare_schedule (struct transfer_args *ta)	1237	prepare_schedule (pTHX_ struct transfer_args *ta)
929	{	1238	{
930	SV *current, *prev, *next;	1239	SV *prev_sv, *next_sv;
931
932	current = GvSV (coro_current);
933		1240
934	for (;;)	1241	for (;;)
935	{	1242	{
936	LOCK;	1243	LOCK;
937	next = coro_deq (PRIO_MIN);	1244	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1245
		1246	/* nothing to schedule: call the idle handler */
		1247	if (!next_sv)
		1248	{
		1249	dSP;
		1250	UNLOCK;
		1251
		1252	ENTER;
		1253	SAVETMPS;
		1254
		1255	PUSHMARK (SP);
		1256	PUTBACK;
		1257	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1258
		1259	FREETMPS;
		1260	LEAVE;
		1261	continue;
		1262	}
		1263
		1264	ta->next = SvSTATE (next_sv);
		1265
		1266	/* cannot transfer to destroyed coros, skip and look for next */
		1267	if (ta->next->flags & CF_DESTROYED)
		1268	{
		1269	UNLOCK;
		1270	SvREFCNT_dec (next_sv);
		1271	/* coro_nready is already taken care of by destroy */
		1272	continue;
		1273	}
		1274
		1275	--coro_nready;
938	UNLOCK;	1276	UNLOCK;
939
940	if (next)
941	break;	1277	break;
942
943	{
944	dSP;
945
946	ENTER;
947	SAVETMPS;
948
949	PUSHMARK (SP);
950	PUTBACK;
951	call_sv (GvSV (coro_idle), G_DISCARD);
952
953	FREETMPS;
954	LEAVE;
955	}	1278	}
956	}
957
958	prev = SvRV (current);
959	SvRV (current) = next;
960		1279
961	/* free this only after the transfer */	1280	/* free this only after the transfer */
		1281	prev_sv = SvRV (coro_current);
		1282	ta->prev = SvSTATE (prev_sv);
		1283	TRANSFER_CHECK (*ta);
		1284	assert (ta->next->flags & CF_READY);
		1285	ta->next->flags &= ~CF_READY;
		1286	SvRV_set (coro_current, next_sv);
		1287
962	LOCK;	1288	LOCK;
963	free_coro_mortal ();	1289	free_coro_mortal (aTHX);
		1290	coro_mortal = prev_sv;
964	UNLOCK;	1291	UNLOCK;
965	coro_mortal = prev;
966
967	ta->prev = SvSTATE (prev);
968	ta->next = SvSTATE (next);
969	ta->flags = TRANSFER_SAVE_ALL;
970
971	ta->next->flags &= ~CF_READY;
972	}	1292	}
973		1293
974	static void	1294	static void
975	prepare_cede (struct transfer_args *ta)	1295	prepare_cede (pTHX_ struct transfer_args *ta)
976	{	1296	{
977	api_ready (GvSV (coro_current));	1297	api_ready (coro_current);
978
979	prepare_schedule (ta);	1298	prepare_schedule (aTHX_ ta);
		1299	}
		1300
		1301	static int
		1302	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1303	{
		1304	if (coro_nready)
		1305	{
		1306	SV *prev = SvRV (coro_current);
		1307	prepare_schedule (aTHX_ ta);
		1308	api_ready (prev);
		1309	return 1;
		1310	}
		1311	else
		1312	return 0;
980	}	1313	}
981		1314
982	static void	1315	static void
983	api_schedule (void)	1316	api_schedule (void)
984	{	1317	{
985	dTHX;	1318	dTHX;
986	struct transfer_args ta;	1319	struct transfer_args ta;
987		1320
988	prepare_schedule (&ta);	1321	prepare_schedule (aTHX_ &ta);
989	TRANSFER (ta);	1322	TRANSFER (ta);
990	}	1323	}
991		1324
992	static void	1325	static int
993	api_cede (void)	1326	api_cede (void)
994	{	1327	{
995	dTHX;	1328	dTHX;
996	struct transfer_args ta;	1329	struct transfer_args ta;
997		1330
998	prepare_cede (&ta);	1331	prepare_cede (aTHX_ &ta);
		1332
		1333	if (ta.prev != ta.next)
		1334	{
999	TRANSFER (ta);	1335	TRANSFER (ta);
		1336	return 1;
		1337	}
		1338	else
		1339	return 0;
1000	}	1340	}
1001		1341
		1342	static int
		1343	api_cede_notself (void)
		1344	{
		1345	dTHX;
		1346	struct transfer_args ta;
		1347
		1348	if (prepare_cede_notself (aTHX_ &ta))
		1349	{
		1350	TRANSFER (ta);
		1351	return 1;
		1352	}
		1353	else
		1354	return 0;
		1355	}
		1356
		1357	static void
		1358	api_trace (SV *coro_sv, int flags)
		1359	{
		1360	dTHX;
		1361	struct coro *coro = SvSTATE (coro_sv);
		1362
		1363	if (flags & CC_TRACE)
		1364	{
		1365	if (!coro->cctx)
		1366	coro->cctx = cctx_new ();
		1367	else if (!(coro->cctx->flags & CC_TRACE))
		1368	croak ("cannot enable tracing on coroutine with custom stack");
		1369
		1370	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1371	}
		1372	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1373	{
		1374	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1375
		1376	if (coro->flags & CF_RUNNING)
		1377	PL_runops = RUNOPS_DEFAULT;
		1378	else
		1379	coro->runops = RUNOPS_DEFAULT;
		1380	}
		1381	}
		1382
1002	MODULE = Coro::State PACKAGE = Coro::State	1383	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1003		1384
1004	PROTOTYPES: DISABLE	1385	PROTOTYPES: DISABLE
1005		1386
1006	BOOT:	1387	BOOT:
1007	{	1388	{
1008	#ifdef USE_ITHREADS	1389	#ifdef USE_ITHREADS
1009	MUTEX_INIT (&coro_mutex);	1390	MUTEX_INIT (&coro_mutex);
1010	#endif	1391	#endif
1011	BOOT_PAGESIZE;	1392	BOOT_PAGESIZE;
1012		1393
		1394	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1395
1013	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1396	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1014		1397
1015	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1398	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1016	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1399	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1017	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1400	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1401	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1018		1402
1019	main_mainstack = PL_mainstack;	1403	main_mainstack = PL_mainstack;
		1404	main_top_env = PL_top_env;
		1405
		1406	while (main_top_env->je_prev)
		1407	main_top_env = main_top_env->je_prev;
1020		1408
1021	coroapi.ver = CORO_API_VERSION;	1409	coroapi.ver = CORO_API_VERSION;
1022	coroapi.transfer = api_transfer;	1410	coroapi.transfer = api_transfer;
1023		1411
1024	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1412	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1031	struct coro *coro;	1419	struct coro *coro;
1032	HV *hv;	1420	HV *hv;
1033	int i;	1421	int i;
1034		1422
1035	Newz (0, coro, 1, struct coro);	1423	Newz (0, coro, 1, struct coro);
1036	coro->args = newAV ();	1424	coro->args = newAV ();
		1425	coro->flags = CF_NEW;
1037		1426
		1427	if (coro_first) coro_first->prev = coro;
		1428	coro->next = coro_first;
		1429	coro_first = coro;
		1430
1038	hv = newHV ();	1431	coro->hv = hv = newHV ();
1039	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1432	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1040	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1433	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1041		1434
1042	for (i = 1; i < items; i++)	1435	for (i = 1; i < items; i++)
1043	av_push (coro->args, newSVsv (ST (i)));	1436	av_push (coro->args, newSVsv (ST (i)));
1044	}	1437	}
1045	OUTPUT:	1438	OUTPUT:
1046	RETVAL	1439	RETVAL
1047		1440
		1441	# these not obviously related functions are all rolled into the same xs
		1442	# function to increase chances that they all will call transfer with the same
		1443	# stack offset
1048	void	1444	void
1049	_set_stacklevel (...)	1445	_set_stacklevel (...)
1050	ALIAS:	1446	ALIAS:
1051	Coro::State::transfer = 1	1447	Coro::State::transfer = 1
1052	Coro::schedule = 2	1448	Coro::schedule = 2
1053	Coro::cede = 3	1449	Coro::cede = 3
1054	Coro::Cont::yield = 4	1450	Coro::cede_notself = 4
1055	CODE:	1451	CODE:
1056	{	1452	{
1057	struct transfer_args ta;	1453	struct transfer_args ta;
1058		1454
1059	switch (ix)	1455	switch (ix)
1060	{	1456	{
1061	case 0:	1457	case 0:
1062	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1458	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1063	ta.next = 0;	1459	ta.next = 0;
1064	ta.flags = TRANSFER_SET_STACKLEVEL;
1065	break;	1460	break;
1066		1461
1067	case 1:	1462	case 1:
1068	if (items != 3)	1463	if (items != 2)
1069	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1464	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1070		1465
1071	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1466	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1072	break;	1467	break;
1073		1468
1074	case 2:	1469	case 2:
1075	prepare_schedule (&ta);	1470	prepare_schedule (aTHX_ &ta);
1076	break;	1471	break;
1077		1472
1078	case 3:	1473	case 3:
1079	prepare_cede (&ta);	1474	prepare_cede (aTHX_ &ta);
1080	break;	1475	break;
1081		1476
1082	case 4:	1477	case 4:
1083	{	1478	if (!prepare_cede_notself (aTHX_ &ta))
1084	SV *yieldstack;	1479	XSRETURN_EMPTY;
1085	SV *sv;
1086	AV *defav = GvAV (PL_defgv);
1087		1480
1088	yieldstack = *hv_fetch (
1089	(HV *)SvRV (GvSV (coro_current)),
1090	"yieldstack", sizeof ("yieldstack") - 1,
1091	0
1092	);
1093
1094	/* set up @_ -- ugly */
1095	av_clear (defav);
1096	av_fill (defav, items - 1);
1097	while (items--)
1098	av_store (defav, items, SvREFCNT_inc (ST(items)));
1099
1100	sv = av_pop ((AV *)SvRV (yieldstack));
1101	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1102	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1103	ta.flags = 0;
1104	SvREFCNT_dec (sv);
1105	}
1106	break;	1481	break;
1107
1108	}	1482	}
1109		1483
		1484	BARRIER;
1110	TRANSFER (ta);	1485	TRANSFER (ta);
1111	}
1112		1486
1113	void	1487	if (GIMME_V != G_VOID && ta.next != ta.prev)
1114	_clone_state_from (SV *dst, SV *src)	1488	XSRETURN_YES;
		1489	}
		1490
		1491	bool
		1492	_destroy (SV *coro_sv)
1115	CODE:	1493	CODE:
1116	{	1494	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1117	struct coro *coro_src = SvSTATE (src);	1495	OUTPUT:
1118		1496	RETVAL
1119	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1120
1121	++coro_src->refcnt;
1122	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1123	}
1124		1497
1125	void	1498	void
1126	_exit (code)	1499	_exit (code)
1127	int code	1500	int code
1128	PROTOTYPE: $	1501	PROTOTYPE: $
1129	CODE:	1502	CODE:
1130	_exit (code);	1503	_exit (code);
1131		1504
1132	int	1505	int
		1506	cctx_stacksize (int new_stacksize = 0)
		1507	CODE:
		1508	RETVAL = coro_stacksize;
		1509	if (new_stacksize)
		1510	coro_stacksize = new_stacksize;
		1511	OUTPUT:
		1512	RETVAL
		1513
		1514	int
1133	cctx_count ()	1515	cctx_count ()
1134	CODE:	1516	CODE:
1135	RETVAL = cctx_count;	1517	RETVAL = cctx_count;
1136	OUTPUT:	1518	OUTPUT:
1137	RETVAL	1519	RETVAL
…		…
1141	CODE:	1523	CODE:
1142	RETVAL = cctx_idle;	1524	RETVAL = cctx_idle;
1143	OUTPUT:	1525	OUTPUT:
1144	RETVAL	1526	RETVAL
1145		1527
		1528	void
		1529	list ()
		1530	PPCODE:
		1531	{
		1532	struct coro *coro;
		1533	for (coro = coro_first; coro; coro = coro->next)
		1534	if (coro->hv)
		1535	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1536	}
		1537
		1538	void
		1539	call (Coro::State coro, SV *coderef)
		1540	ALIAS:
		1541	eval = 1
		1542	CODE:
		1543	{
		1544	if (coro->mainstack)
		1545	{
		1546	struct coro temp;
		1547	Zero (&temp, 1, struct coro);
		1548
		1549	if (!(coro->flags & CF_RUNNING))
		1550	{
		1551	save_perl (aTHX_ &temp);
		1552	load_perl (aTHX_ coro);
		1553	}
		1554
		1555	{
		1556	dSP;
		1557	ENTER;
		1558	SAVETMPS;
		1559	PUSHMARK (SP);
		1560	PUTBACK;
		1561	if (ix)
		1562	eval_sv (coderef, 0);
		1563	else
		1564	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1565	SPAGAIN;
		1566	FREETMPS;
		1567	LEAVE;
		1568	PUTBACK;
		1569	}
		1570
		1571	if (!(coro->flags & CF_RUNNING))
		1572	{
		1573	save_perl (aTHX_ coro);
		1574	load_perl (aTHX_ &temp);
		1575	}
		1576	}
		1577	}
		1578
		1579	SV *
		1580	is_ready (Coro::State coro)
		1581	PROTOTYPE: $
		1582	ALIAS:
		1583	is_ready = CF_READY
		1584	is_running = CF_RUNNING
		1585	is_new = CF_NEW
		1586	is_destroyed = CF_DESTROYED
		1587	CODE:
		1588	RETVAL = boolSV (coro->flags & ix);
		1589	OUTPUT:
		1590	RETVAL
		1591
		1592	void
		1593	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1594
		1595	SV *
		1596	has_stack (Coro::State coro)
		1597	PROTOTYPE: $
		1598	CODE:
		1599	RETVAL = boolSV (!!coro->cctx);
		1600	OUTPUT:
		1601	RETVAL
		1602
		1603	int
		1604	is_traced (Coro::State coro)
		1605	PROTOTYPE: $
		1606	CODE:
		1607	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1608	OUTPUT:
		1609	RETVAL
		1610
		1611	IV
		1612	rss (Coro::State coro)
		1613	PROTOTYPE: $
		1614	ALIAS:
		1615	usecount = 1
		1616	CODE:
		1617	switch (ix)
		1618	{
		1619	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1620	case 1: RETVAL = coro->usecount; break;
		1621	}
		1622	OUTPUT:
		1623	RETVAL
		1624
		1625
1146	MODULE = Coro::State PACKAGE = Coro	1626	MODULE = Coro::State PACKAGE = Coro
1147		1627
1148	BOOT:	1628	BOOT:
1149	{	1629	{
1150	int i;	1630	int i;
		1631
		1632	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1633	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1634	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1635
		1636	coro_current = get_sv ("Coro::current", FALSE);
		1637	SvREADONLY_on (coro_current);
1151		1638
1152	coro_stash = gv_stashpv ("Coro", TRUE);	1639	coro_stash = gv_stashpv ("Coro", TRUE);
1153		1640
1154	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1641	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1155	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1642	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1156	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1643	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1157	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1644	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1158	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1645	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1159	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1646	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1160		1647
1161	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1162	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1163
1164	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1648	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1165	coro_ready[i] = newAV ();	1649	coro_ready[i] = newAV ();
1166		1650
1167	{	1651	{
1168	SV *sv = perl_get_sv("Coro::API", 1);	1652	SV *sv = perl_get_sv("Coro::API", 1);
1169		1653
1170	coroapi.schedule = api_schedule;	1654	coroapi.schedule = api_schedule;
1171	coroapi.cede = api_cede;	1655	coroapi.cede = api_cede;
		1656	coroapi.cede_notself = api_cede_notself;
1172	coroapi.ready = api_ready;	1657	coroapi.ready = api_ready;
1173	coroapi.is_ready = api_is_ready;	1658	coroapi.is_ready = api_is_ready;
1174	coroapi.nready = &coro_nready;	1659	coroapi.nready = &coro_nready;
1175	coroapi.current = coro_current;	1660	coroapi.current = coro_current;
1176		1661
1177	GCoroAPI = &coroapi;	1662	GCoroAPI = &coroapi;
1178	sv_setiv (sv, (IV)&coroapi);	1663	sv_setiv (sv, (IV)&coroapi);
1179	SvREADONLY_on (sv);	1664	SvREADONLY_on (sv);
1180	}	1665	}
1181	}	1666	}
		1667
		1668	void
		1669	_set_current (SV *current)
		1670	PROTOTYPE: $
		1671	CODE:
		1672	SvREFCNT_dec (SvRV (coro_current));
		1673	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1182		1674
1183	int	1675	int
1184	prio (Coro::State coro, int newprio = 0)	1676	prio (Coro::State coro, int newprio = 0)
1185	ALIAS:	1677	ALIAS:
1186	nice = 1	1678	nice = 1
…		…
1189	RETVAL = coro->prio;	1681	RETVAL = coro->prio;
1190		1682
1191	if (items > 1)	1683	if (items > 1)
1192	{	1684	{
1193	if (ix)	1685	if (ix)
1194	newprio += coro->prio;	1686	newprio = coro->prio - newprio;
1195		1687
1196	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1688	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1197	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1689	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1198		1690
1199	coro->prio = newprio;	1691	coro->prio = newprio;
1200	}	1692	}
1201	}	1693	}
		1694	OUTPUT:
		1695	RETVAL
1202		1696
1203	SV *	1697	SV *
1204	ready (SV *self)	1698	ready (SV *self)
1205	PROTOTYPE: $	1699	PROTOTYPE: $
1206	CODE:	1700	CODE:
1207	RETVAL = boolSV (api_ready (self));	1701	RETVAL = boolSV (api_ready (self));
1208	OUTPUT:	1702	OUTPUT:
1209	RETVAL	1703	RETVAL
1210		1704
1211	SV *
1212	is_ready (SV *self)
1213	PROTOTYPE: $
1214	CODE:
1215	RETVAL = boolSV (api_is_ready (self));
1216	OUTPUT:
1217	RETVAL
1218
1219	int	1705	int
1220	nready (...)	1706	nready (...)
1221	PROTOTYPE:	1707	PROTOTYPE:
1222	CODE:	1708	CODE:
1223	RETVAL = coro_nready;	1709	RETVAL = coro_nready;
1224	OUTPUT:	1710	OUTPUT:
1225	RETVAL	1711	RETVAL
1226		1712
		1713	# for async_pool speedup
		1714	void
		1715	_pool_1 (SV *cb)
		1716	CODE:
		1717	{
		1718	struct coro *coro = SvSTATE (coro_current);
		1719	HV *hv = (HV *)SvRV (coro_current);
		1720	AV *defav = GvAV (PL_defgv);
		1721	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1722	AV *invoke_av;
		1723	int i, len;
		1724
		1725	if (!invoke)
		1726	croak ("\3terminate\2\n");
		1727
		1728	SvREFCNT_dec (coro->asp_deffh);
		1729	coro->asp_deffh = SvREFCNT_inc (PL_defoutgv);
		1730
		1731	hv_store (hv, "desc", sizeof ("desc") - 1,
		1732	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1733
		1734	invoke_av = (AV *)SvRV (invoke);
		1735	len = av_len (invoke_av);
		1736
		1737	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1738
		1739	if (len > 0)
		1740	{
		1741	av_fill (defav, len - 1);
		1742	for (i = 0; i < len; ++i)
		1743	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1744	}
		1745
		1746	SvREFCNT_dec (invoke);
		1747	}
		1748
		1749	void
		1750	_pool_2 (SV *cb)
		1751	CODE:
		1752	{
		1753	struct coro *coro = SvSTATE (coro_current);
		1754
		1755	sv_setsv (cb, &PL_sv_undef);
		1756
		1757	SvREFCNT_dec (PL_defoutgv); PL_defoutgv = coro->asp_deffh;
		1758	coro->asp_deffh = 0;
		1759
		1760	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1761	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1762	croak ("\3terminate\2\n");
		1763
		1764	av_clear (GvAV (PL_defgv));
		1765	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1766	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1767
		1768	coro->prio = 0;
		1769
		1770	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1771	api_trace (coro_current, 0);
		1772
		1773	av_push (av_async_pool, newSVsv (coro_current));
		1774	}
		1775
		1776
1227	MODULE = Coro::State PACKAGE = Coro::AIO	1777	MODULE = Coro::State PACKAGE = Coro::AIO
1228		1778
1229	SV *	1779	SV *
1230	_get_state ()	1780	_get_state ()
1231	CODE:	1781	CODE:
1232	{	1782	{
1233	struct {	1783	struct io_state *data;
1234	int errorno;
1235	int laststype;
1236	int laststatval;
1237	Stat_t statcache;
1238	} data;
1239		1784
		1785	RETVAL = newSV (sizeof (struct io_state));
		1786	data = (struct io_state *)SvPVX (RETVAL);
		1787	SvCUR_set (RETVAL, sizeof (struct io_state));
		1788	SvPOK_only (RETVAL);
		1789
1240	data.errorno = errno;	1790	data->errorno = errno;
1241	data.laststype = PL_laststype;	1791	data->laststype = PL_laststype;
1242	data.laststatval = PL_laststatval;	1792	data->laststatval = PL_laststatval;
1243	data.statcache = PL_statcache;	1793	data->statcache = PL_statcache;
1244
1245	RETVAL = newSVpvn ((char *)&data, sizeof data);
1246	}	1794	}
1247	OUTPUT:	1795	OUTPUT:
1248	RETVAL	1796	RETVAL
1249		1797
1250	void	1798	void
1251	_set_state (char *data_)	1799	_set_state (char *data_)
1252	PROTOTYPE: $	1800	PROTOTYPE: $
1253	CODE:	1801	CODE:
1254	{	1802	{
1255	struct {	1803	struct io_state *data = (void *)data_;
1256	int errorno;
1257	int laststype;
1258	int laststatval;
1259	Stat_t statcache;
1260	} *data = (void *)data_;
1261		1804
1262	errno = data->errorno;	1805	errno = data->errorno;
1263	PL_laststype = data->laststype;	1806	PL_laststype = data->laststype;
1264	PL_laststatval = data->laststatval;	1807	PL_laststatval = data->laststatval;
1265	PL_statcache = data->statcache;	1808	PL_statcache = data->statcache;
1266	}	1809	}
		1810

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