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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.111 by root, Thu Nov 30 18:21:14 2006 UTC vs.
Revision 1.193 by root, Fri Oct 5 23:38:40 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	/* 5.8.8 */
		81	#ifndef GV_NOTQUAL
		82	# define GV_NOTQUAL 0
		83	#endif
		84	#ifndef newSV
		85	# define newSV(l) NEWSV(0,l)
		86	#endif
		87
		88	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		89	# undef CORO_STACKGUARD
		90	#endif
		91
		92	#ifndef CORO_STACKGUARD
		93	# define CORO_STACKGUARD 0
		94	#endif
		95
		96	/* prefer perl internal functions over our own? */
		97	#ifndef CORO_PREFER_PERL_FUNCTIONS
		98	# define CORO_PREFER_PERL_FUNCTIONS 0
		99	#endif
		100
		101	/* The next macros try to return the current stack pointer, in an as
		102	* portable way as possible. */
77	#define dSTACKLEVEL int stacklevel	103	#define dSTACKLEVEL volatile char stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	104	#define STACKLEVEL ((void *)&stacklevel)
79		105
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	106	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		107
82	#if __GNUC__ >= 3	108	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	109	# define attribute(x) __attribute__(x)
		110	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
84	#else	111	#else
85	# define attribute(x)	112	# define attribute(x)
		113	# define BARRIER
86	#endif	114	#endif
87		115
88	#define NOINLINE attribute ((noinline))	116	#define NOINLINE attribute ((noinline))
89		117
90	#include "CoroAPI.h"	118	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		119
94	#ifdef USE_ITHREADS	120	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	121	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	122	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	123	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	124	#else
99	# define LOCK (void)0	125	# define LOCK (void)0
100	# define UNLOCK (void)0	126	# define UNLOCK (void)0
101	#endif	127	#endif
102		128
		129	/* helper storage struct for Coro::AIO */
		130	struct io_state
		131	{
		132	int errorno;
		133	I32 laststype;
		134	int laststatval;
		135	Stat_t statcache;
		136	};
		137
		138	static size_t coro_stacksize = CORO_STACKSIZE;
103	static struct CoroAPI coroapi;	139	static struct CoroAPI coroapi;
104	static AV *main_mainstack; /* used to differentiate between $main and others */	140	static AV *main_mainstack; /* used to differentiate between $main and others */
		141	static JMPENV *main_top_env;
105	static HV *coro_state_stash, *coro_stash;	142	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	143	static SV *coro_mortal; /* will be freed after next transfer */
107		144
		145	static GV *irsgv; /* $/ */
		146	static GV *stdoutgv; /* *STDOUT */
		147
		148	/* async_pool helper stuff */
		149	static SV *sv_pool_rss;
		150	static SV *sv_pool_size;
		151	static AV *av_async_pool;
		152
108	static struct coro_cctx *cctx_first;	153	static struct coro_cctx *cctx_first;
109	static int cctx_count, cctx_idle;	154	static int cctx_count, cctx_idle;
		155
		156	enum {
		157	CC_MAPPED = 0x01,
		158	CC_NOREUSE = 0x02, /* throw this away after tracing */
		159	CC_TRACE = 0x04,
		160	CC_TRACE_SUB = 0x08, /* trace sub calls */
		161	CC_TRACE_LINE = 0x10, /* trace each statement */
		162	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		163	};
110		164
111	/* this is a structure representing a c-level coroutine */	165	/* this is a structure representing a c-level coroutine */
112	typedef struct coro_cctx {	166	typedef struct coro_cctx {
113	struct coro_cctx *next;	167	struct coro_cctx *next;
114		168
115	/* the stack */	169	/* the stack */
116	void *sptr;	170	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	171	size_t ssize;
118		172
119	/* cpu state */	173	/* cpu state */
120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	174	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		175	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	176	JMPENV *top_env;
122	coro_context cctx;	177	coro_context cctx;
123		178
124	int inuse;
125
126	#if USE_VALGRIND	179	#if CORO_USE_VALGRIND
127	int valgrind_id;	180	int valgrind_id;
128	#endif	181	#endif
		182	unsigned char flags;
129	} coro_cctx;	183	} coro_cctx;
130		184
131	enum {	185	enum {
132	CF_RUNNING, /* coroutine is running */	186	CF_RUNNING = 0x0001, /* coroutine is running */
133	CF_READY, /* coroutine is ready */	187	CF_READY = 0x0002, /* coroutine is ready */
		188	CF_NEW = 0x0004, /* has never been switched to */
		189	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
134	};	190	};
135		191
136	/* this is a structure representing a perl-level coroutine */	192	/* this is a structure representing a perl-level coroutine */
137	struct coro {	193	struct coro {
138	/* the c coroutine allocated to this perl coroutine, if any */	194	/* the c coroutine allocated to this perl coroutine, if any */
139	coro_cctx *cctx;	195	coro_cctx *cctx;
140		196
141	/* data associated with this coroutine (initial args) */	197	/* data associated with this coroutine (initial args) */
142	AV *args;	198	AV *args;
143	int refcnt;	199	int refcnt;
144	int flags;	200	int flags; /* CF_ flags */
145		201
146	/* optionally saved, might be zero */	202	/* optionally saved, might be zero */
147	AV *defav;	203	AV *defav; /* @_ */
148	SV *defsv;	204	SV *defsv; /* $_ */
149	SV *errsv;	205	SV *errsv; /* $@ */
		206	SV *deffh; /* default filehandle */
		207	SV *irssv; /* $/ */
		208	SV *irssv_sv; /* real $/ cache */
150		209
151	#define VAR(name,type) type name;	210	#define VAR(name,type) type name;
152	# include "state.h"	211	# include "state.h"
153	#undef VAR	212	#undef VAR
154		213
		214	/* statistics */
		215	int usecount; /* number of transfers to this coro */
		216
155	/* coro process data */	217	/* coro process data */
156	int prio;	218	int prio;
		219	//SV *throw;
		220
		221	/* async_pool */
		222	SV *saved_deffh;
		223
		224	/* linked list */
		225	struct coro *next, *prev;
		226	HV *hv; /* the perl hash associated with this coro, if any */
157	};	227	};
158		228
159	typedef struct coro *Coro__State;	229	typedef struct coro *Coro__State;
160	typedef struct coro *Coro__State_or_hashref;	230	typedef struct coro *Coro__State_or_hashref;
161		231
		232	/** Coro ********************************************************************/
		233
		234	#define PRIO_MAX 3
		235	#define PRIO_HIGH 1
		236	#define PRIO_NORMAL 0
		237	#define PRIO_LOW -1
		238	#define PRIO_IDLE -3
		239	#define PRIO_MIN -4
		240
		241	/* for Coro.pm */
		242	static SV *coro_current;
		243	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		244	static int coro_nready;
		245	static struct coro *coro_first;
		246
		247	/** lowlevel stuff **********************************************************/
		248
162	static AV *	249	static AV *
163	coro_clone_padlist (CV *cv)	250	coro_clone_padlist (pTHX_ CV *cv)
164	{	251	{
165	AV *padlist = CvPADLIST (cv);	252	AV *padlist = CvPADLIST (cv);
166	AV *newpadlist, *newpad;	253	AV *newpadlist, *newpad;
167		254
168	newpadlist = newAV ();	255	newpadlist = newAV ();
…		…
180		267
181	return newpadlist;	268	return newpadlist;
182	}	269	}
183		270
184	static void	271	static void
185	free_padlist (AV *padlist)	272	free_padlist (pTHX_ AV *padlist)
186	{	273	{
187	/* may be during global destruction */	274	/* may be during global destruction */
188	if (SvREFCNT (padlist))	275	if (SvREFCNT (padlist))
189	{	276	{
190	I32 i = AvFILLp (padlist);	277	I32 i = AvFILLp (padlist);
…		…
211	AV *padlist;	298	AV *padlist;
212	AV *av = (AV *)mg->mg_obj;	299	AV *av = (AV *)mg->mg_obj;
213		300
214	/* casting is fun. */	301	/* casting is fun. */
215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	302	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
216	free_padlist (padlist);	303	free_padlist (aTHX_ padlist);
217		304
218	SvREFCNT_dec (av);	305	SvREFCNT_dec (av);
219		306
220	return 0;	307	return 0;
221	}	308	}
…		…
229	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	316	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
230	? SvMAGIC (cv) \	317	? SvMAGIC (cv) \
231	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	318	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
232	: 0	319	: 0
233		320
		321	static struct coro *
		322	SvSTATE_ (pTHX_ SV *coro)
		323	{
		324	HV *stash;
		325	MAGIC *mg;
		326
		327	if (SvROK (coro))
		328	coro = SvRV (coro);
		329
		330	if (SvTYPE (coro) != SVt_PVHV)
		331	croak ("Coro::State object required");
		332
		333	stash = SvSTASH (coro);
		334	if (stash != coro_stash && stash != coro_state_stash)
		335	{
		336	/* very slow, but rare, check */
		337	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		338	croak ("Coro::State object required");
		339	}
		340
		341	mg = CORO_MAGIC (coro);
		342	return (struct coro *)mg->mg_ptr;
		343	}
		344
		345	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		346
234	/* the next two functions merely cache the padlists */	347	/* the next two functions merely cache the padlists */
235	static void	348	static void
236	get_padlist (CV *cv)	349	get_padlist (pTHX_ CV *cv)
237	{	350	{
238	MAGIC *mg = CORO_MAGIC (cv);	351	MAGIC *mg = CORO_MAGIC (cv);
239	AV *av;	352	AV *av;
240		353
241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	354	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	355	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	356	else
244	{	357	{
245	#if 0	358	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	359	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	360	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	361	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	362	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	363	SvREFCNT_dec (cp);
251	#else	364	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	365	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	366	#endif
254	}	367	}
255	}	368	}
256		369
257	static void	370	static void
258	put_padlist (CV *cv)	371	put_padlist (pTHX_ CV *cv)
259	{	372	{
260	MAGIC *mg = CORO_MAGIC (cv);	373	MAGIC *mg = CORO_MAGIC (cv);
261	AV *av;	374	AV *av;
262		375
263	if (!mg)	376	if (!mg)
…		…
274	av_extend (av, AvMAX (av) + 1);	387	av_extend (av, AvMAX (av) + 1);
275		388
276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	389	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277	}	390	}
278		391
279	#define SB do {	392	/** load & save, init *******************************************************/
280	#define SE } while (0)
281		393
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	394	static void
288	load_state(Coro__State c)	395	load_perl (pTHX_ Coro__State c)
289	{	396	{
290	#define VAR(name,type) PL_ ## name = c->name;	397	#define VAR(name,type) PL_ ## name = c->name;
291	# include "state.h"	398	# include "state.h"
292	#undef VAR	399	#undef VAR
293		400
294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	401	GvSV (PL_defgv) = c->defsv;
295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	402	GvAV (PL_defgv) = c->defav;
296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	403	GvSV (PL_errgv) = c->errsv;
		404	GvSV (irsgv) = c->irssv_sv;
297		405
298	{	406	{
299	dSP;	407	dSP;
300	CV *cv;	408	CV *cv;
301		409
302	/* now do the ugly restore mess */	410	/* now do the ugly restore mess */
303	while ((cv = (CV *)POPs))	411	while ((cv = (CV *)POPs))
304	{	412	{
305	put_padlist (cv); /* mark this padlist as available */	413	put_padlist (aTHX_ cv); /* mark this padlist as available */
306	CvDEPTH (cv) = PTR2IV (POPs);	414	CvDEPTH (cv) = PTR2IV (POPs);
307	CvPADLIST (cv) = (AV *)POPs;	415	CvPADLIST (cv) = (AV *)POPs;
308	}	416	}
309		417
310	PUTBACK;	418	PUTBACK;
311	}	419	}
312	}	420	}
313		421
314	static void	422	static void
315	save_state(Coro__State c, int flags)	423	save_perl (pTHX_ Coro__State c)
316	{	424	{
317	{	425	{
318	dSP;	426	dSP;
319	I32 cxix = cxstack_ix;	427	I32 cxix = cxstack_ix;
320	PERL_CONTEXT *ccstk = cxstack;	428	PERL_CONTEXT *ccstk = cxstack;
…		…
323	/*	431	/*
324	* the worst thing you can imagine happens first - we have to save	432	* the worst thing you can imagine happens first - we have to save
325	* (and reinitialize) all cv's in the whole callchain :(	433	* (and reinitialize) all cv's in the whole callchain :(
326	*/	434	*/
327		435
328	PUSHs (Nullsv);	436	XPUSHs (Nullsv);
329	/* this loop was inspired by pp_caller */	437	/* this loop was inspired by pp_caller */
330	for (;;)	438	for (;;)
331	{	439	{
332	while (cxix >= 0)	440	while (cxix >= 0)
333	{	441	{
334	PERL_CONTEXT *cx = &ccstk[cxix--];	442	PERL_CONTEXT *cx = &ccstk[cxix--];
335		443
336	if (CxTYPE(cx) == CXt_SUB)	444	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
337	{	445	{
338	CV *cv = cx->blk_sub.cv;	446	CV *cv = cx->blk_sub.cv;
339		447
340	if (CvDEPTH (cv))	448	if (CvDEPTH (cv))
341	{	449	{
342	EXTEND (SP, 3);	450	EXTEND (SP, 3);
343
344	PUSHs ((SV *)CvPADLIST(cv));	451	PUSHs ((SV *)CvPADLIST (cv));
345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	452	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
346	PUSHs ((SV *)cv);	453	PUSHs ((SV *)cv);
347		454
348	CvDEPTH (cv) = 0;	455	CvDEPTH (cv) = 0;
349	get_padlist (cv);	456	get_padlist (aTHX_ cv);
350	}	457	}
351	}	458	}
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	}	459	}
361		460
362	if (top_si->si_type == PERLSI_MAIN)	461	if (top_si->si_type == PERLSI_MAIN)
363	break;	462	break;
364		463
365	top_si = top_si->si_prev;	464	top_si = top_si->si_prev;
366	ccstk = top_si->si_cxstack;	465	ccstk = top_si->si_cxstack;
367	cxix = top_si->si_cxix;	466	cxix = top_si->si_cxix;
368	}	467	}
369		468
370	PUTBACK;	469	PUTBACK;
371	}	470	}
372		471
373	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	472	c->defav = GvAV (PL_defgv);
374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	473	c->defsv = DEFSV;
375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	474	c->errsv = ERRSV;
		475	c->irssv_sv = GvSV (irsgv);
376		476
377	#define VAR(name,type)c->name = PL_ ## name;	477	#define VAR(name,type)c->name = PL_ ## name;
378	# include "state.h"	478	# include "state.h"
379	#undef VAR	479	#undef VAR
380	}	480	}
…		…
383	* allocate various perl stacks. This is an exact copy	483	* allocate various perl stacks. This is an exact copy
384	* of perl.c:init_stacks, except that it uses less memory	484	* of perl.c:init_stacks, except that it uses less memory
385	* on the (sometimes correct) assumption that coroutines do	485	* on the (sometimes correct) assumption that coroutines do
386	* not usually need a lot of stackspace.	486	* not usually need a lot of stackspace.
387	*/	487	*/
		488	#if CORO_PREFER_PERL_FUNCTIONS
		489	# define coro_init_stacks init_stacks
		490	#else
388	static void	491	static void
389	coro_init_stacks ()	492	coro_init_stacks (pTHX)
390	{	493	{
391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	494	PL_curstackinfo = new_stackinfo(64, 6);
392	PL_curstackinfo->si_type = PERLSI_MAIN;	495	PL_curstackinfo->si_type = PERLSI_MAIN;
393	PL_curstack = PL_curstackinfo->si_stack;	496	PL_curstack = PL_curstackinfo->si_stack;
394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	497	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
395		498
396	PL_stack_base = AvARRAY(PL_curstack);	499	PL_stack_base = AvARRAY(PL_curstack);
397	PL_stack_sp = PL_stack_base;	500	PL_stack_sp = PL_stack_base;
398	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	501	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
399		502
400	New(50,PL_tmps_stack,96,SV*);	503	New(50,PL_tmps_stack,64,SV*);
401	PL_tmps_floor = -1;	504	PL_tmps_floor = -1;
402	PL_tmps_ix = -1;	505	PL_tmps_ix = -1;
403	PL_tmps_max = 96;	506	PL_tmps_max = 64;
404		507
405	New(54,PL_markstack,16,I32);	508	New(54,PL_markstack,16,I32);
406	PL_markstack_ptr = PL_markstack;	509	PL_markstack_ptr = PL_markstack;
407	PL_markstack_max = PL_markstack + 16;	510	PL_markstack_max = PL_markstack + 16;
408		511
…		…
412		515
413	New(54,PL_scopestack,16,I32);	516	New(54,PL_scopestack,16,I32);
414	PL_scopestack_ix = 0;	517	PL_scopestack_ix = 0;
415	PL_scopestack_max = 16;	518	PL_scopestack_max = 16;
416		519
417	New(54,PL_savestack,96,ANY);	520	New(54,PL_savestack,64,ANY);
418	PL_savestack_ix = 0;	521	PL_savestack_ix = 0;
419	PL_savestack_max = 96;	522	PL_savestack_max = 64;
420		523
421	#if !PERL_VERSION_ATLEAST (5,9,0)	524	#if !PERL_VERSION_ATLEAST (5,9,0)
422	New(54,PL_retstack,8,OP*);	525	New(54,PL_retstack,4,OP*);
423	PL_retstack_ix = 0;	526	PL_retstack_ix = 0;
424	PL_retstack_max = 8;	527	PL_retstack_max = 4;
425	#endif	528	#endif
426	}	529	}
		530	#endif
427		531
428	/*	532	/*
429	* destroy the stacks, the callchain etc...	533	* destroy the stacks, the callchain etc...
430	*/	534	*/
431	static void	535	static void
432	coro_destroy_stacks ()	536	coro_destroy_stacks (pTHX)
433	{	537	{
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)	538	while (PL_curstackinfo->si_next)
446	PL_curstackinfo = PL_curstackinfo->si_next;	539	PL_curstackinfo = PL_curstackinfo->si_next;
447		540
448	while (PL_curstackinfo)	541	while (PL_curstackinfo)
449	{	542	{
450	PERL_SI *p = PL_curstackinfo->si_prev;	543	PERL_SI *p = PL_curstackinfo->si_prev;
451		544
452	{ /*D*//*remove*/
453	dSP;
454	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
455	PUTBACK; /* possibly superfluous */
456	}
457
458	if (!IN_DESTRUCT)	545	if (!IN_DESTRUCT)
459	{
460	dounwind (-1);/*D*//*remove*/
461	SvREFCNT_dec (PL_curstackinfo->si_stack);	546	SvREFCNT_dec (PL_curstackinfo->si_stack);
462	}
463		547
464	Safefree (PL_curstackinfo->si_cxstack);	548	Safefree (PL_curstackinfo->si_cxstack);
465	Safefree (PL_curstackinfo);	549	Safefree (PL_curstackinfo);
466	PL_curstackinfo = p;	550	PL_curstackinfo = p;
467	}	551	}
…		…
473	#if !PERL_VERSION_ATLEAST (5,9,0)	557	#if !PERL_VERSION_ATLEAST (5,9,0)
474	Safefree (PL_retstack);	558	Safefree (PL_retstack);
475	#endif	559	#endif
476	}	560	}
477		561
478	static void	562	static size_t
479	setup_coro (struct coro *coro)	563	coro_rss (pTHX_ struct coro *coro)
		564	{
		565	size_t rss = sizeof (*coro);
		566
		567	if (coro->mainstack)
		568	{
		569	if (coro->flags & CF_RUNNING)
		570	{
		571	#define VAR(name,type)coro->name = PL_ ## name;
		572	# include "state.h"
		573	#undef VAR
		574	}
		575
		576	rss += sizeof (coro->curstackinfo);
		577	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		578	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		579	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		580	rss += coro->tmps_max * sizeof (SV *);
		581	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		582	rss += coro->scopestack_max * sizeof (I32);
		583	rss += coro->savestack_max * sizeof (ANY);
		584
		585	#if !PERL_VERSION_ATLEAST (5,9,0)
		586	rss += coro->retstack_max * sizeof (OP *);
		587	#endif
		588	}
		589
		590	return rss;
		591	}
		592
		593	/** coroutine stack handling ************************************************/
		594
		595	static void
		596	coro_setup (pTHX_ struct coro *coro)
480	{	597	{
481	/*	598	/*
482	* emulate part of the perl startup here.	599	* emulate part of the perl startup here.
483	*/	600	*/
484
485	coro_init_stacks ();	601	coro_init_stacks (aTHX);
486		602
		603	PL_runops = RUNOPS_DEFAULT;
		604	PL_curcop = &PL_compiling;
		605	PL_in_eval = EVAL_NULL;
487	PL_curcop = 0;	606	PL_comppad = 0;
488	PL_in_eval = 0;
489	PL_curpm = 0;	607	PL_curpm = 0;
		608	PL_localizing = 0;
		609	PL_dirty = 0;
		610	PL_restartop = 0;
		611
		612	GvSV (PL_defgv) = newSV (0);
		613	GvAV (PL_defgv) = coro->args; coro->args = 0;
		614	GvSV (PL_errgv) = newSV (0);
		615	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		616	PL_rs = newSVsv (GvSV (irsgv));
		617	PL_defoutgv = SvREFCNT_inc (stdoutgv);
		618
		619	ENTER; /* necessary e.g. for dounwind */
490		620
491	{	621	{
492	dSP;	622	dSP;
493	LOGOP myop;	623	LOGOP myop;
494		624
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);	625	Zero (&myop, 1, LOGOP);
502	myop.op_next = Nullop;	626	myop.op_next = Nullop;
503	myop.op_flags = OPf_WANT_VOID;	627	myop.op_flags = OPf_WANT_VOID;
504		628
		629	PUSHMARK (SP);
		630	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		631	PUTBACK;
505	PL_op = (OP *)&myop;	632	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);	633	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
511	SPAGAIN;	634	SPAGAIN;
512
513	ENTER; /* necessary e.g. for dounwind */
514	}	635	}
515	}	636	}
516		637
517	static void	638	static void
		639	coro_destroy (pTHX_ struct coro *coro)
		640	{
		641	if (!IN_DESTRUCT)
		642	{
		643	/* restore all saved variables and stuff */
		644	LEAVE_SCOPE (0);
		645	assert (PL_tmps_floor == -1);
		646
		647	/* free all temporaries */
		648	FREETMPS;
		649	assert (PL_tmps_ix == -1);
		650
		651	/* unwind all extra stacks */
		652	POPSTACK_TO (PL_mainstack);
		653
		654	/* unwind main stack */
		655	dounwind (-1);
		656	}
		657
		658	SvREFCNT_dec (GvSV (PL_defgv));
		659	SvREFCNT_dec (GvAV (PL_defgv));
		660	SvREFCNT_dec (GvSV (PL_errgv));
		661	SvREFCNT_dec (PL_defoutgv);
		662	SvREFCNT_dec (PL_rs);
		663	SvREFCNT_dec (GvSV (irsgv));
		664
		665	SvREFCNT_dec (coro->saved_deffh);
		666	//SvREFCNT_dec (coro->throw);
		667
		668	coro_destroy_stacks (aTHX);
		669	}
		670
		671	static void
518	free_coro_mortal ()	672	free_coro_mortal (pTHX)
519	{	673	{
520	if (coro_mortal)	674	if (coro_mortal)
521	{	675	{
522	SvREFCNT_dec (coro_mortal);	676	SvREFCNT_dec (coro_mortal);
523	coro_mortal = 0;	677	coro_mortal = 0;
524	}	678	}
525	}	679	}
526		680
		681	static int
		682	runops_trace (pTHX)
		683	{
		684	COP *oldcop = 0;
		685	int oldcxix = -2;
		686	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		687	coro_cctx *cctx = coro->cctx;
		688
		689	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		690	{
		691	PERL_ASYNC_CHECK ();
		692
		693	if (cctx->flags & CC_TRACE_ALL)
		694	{
		695	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		696	{
		697	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		698	SV **bot, **top;
		699	AV *av = newAV (); /* return values */
		700	SV **cb;
		701	dSP;
		702
		703	GV *gv = CvGV (cx->blk_sub.cv);
		704	SV *fullname = sv_2mortal (newSV (0));
		705	if (isGV (gv))
		706	gv_efullname3 (fullname, gv, 0);
		707
		708	bot = PL_stack_base + cx->blk_oldsp + 1;
		709	top = cx->blk_gimme == G_ARRAY ? SP + 1
		710	: cx->blk_gimme == G_SCALAR ? bot + 1
		711	: bot;
		712
		713	av_extend (av, top - bot);
		714	while (bot < top)
		715	av_push (av, SvREFCNT_inc (*bot++));
		716
		717	PL_runops = RUNOPS_DEFAULT;
		718	ENTER;
		719	SAVETMPS;
		720	EXTEND (SP, 3);
		721	PUSHMARK (SP);
		722	PUSHs (&PL_sv_no);
		723	PUSHs (fullname);
		724	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		725	PUTBACK;
		726	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		727	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		728	SPAGAIN;
		729	FREETMPS;
		730	LEAVE;
		731	PL_runops = runops_trace;
		732	}
		733
		734	if (oldcop != PL_curcop)
		735	{
		736	oldcop = PL_curcop;
		737
		738	if (PL_curcop != &PL_compiling)
		739	{
		740	SV **cb;
		741
		742	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		743	{
		744	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		745
		746	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		747	{
		748	runops_proc_t old_runops = PL_runops;
		749	dSP;
		750	GV *gv = CvGV (cx->blk_sub.cv);
		751	SV *fullname = sv_2mortal (newSV (0));
		752
		753	if (isGV (gv))
		754	gv_efullname3 (fullname, gv, 0);
		755
		756	PL_runops = RUNOPS_DEFAULT;
		757	ENTER;
		758	SAVETMPS;
		759	EXTEND (SP, 3);
		760	PUSHMARK (SP);
		761	PUSHs (&PL_sv_yes);
		762	PUSHs (fullname);
		763	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		764	PUTBACK;
		765	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		766	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		767	SPAGAIN;
		768	FREETMPS;
		769	LEAVE;
		770	PL_runops = runops_trace;
		771	}
		772
		773	oldcxix = cxstack_ix;
		774	}
		775
		776	if (cctx->flags & CC_TRACE_LINE)
		777	{
		778	dSP;
		779
		780	PL_runops = RUNOPS_DEFAULT;
		781	ENTER;
		782	SAVETMPS;
		783	EXTEND (SP, 3);
		784	PL_runops = RUNOPS_DEFAULT;
		785	PUSHMARK (SP);
		786	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		787	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		788	PUTBACK;
		789	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		790	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		791	SPAGAIN;
		792	FREETMPS;
		793	LEAVE;
		794	PL_runops = runops_trace;
		795	}
		796	}
		797	}
		798	}
		799	}
		800
		801	TAINT_NOT;
		802	return 0;
		803	}
		804
		805	/* inject a fake call to Coro::State::_cctx_init into the execution */
		806	/* _cctx_init should be careful, as it could be called at almost any time */
		807	/* during execution of a perl program */
527	static void NOINLINE	808	static void NOINLINE
528	prepare_cctx (coro_cctx *cctx)	809	prepare_cctx (pTHX_ coro_cctx *cctx)
529	{	810	{
530	dSP;	811	dSP;
531	LOGOP myop;	812	LOGOP myop;
532		813
		814	PL_top_env = &PL_start_env;
		815
		816	if (cctx->flags & CC_TRACE)
		817	PL_runops = runops_trace;
		818
533	Zero (&myop, 1, LOGOP);	819	Zero (&myop, 1, LOGOP);
534	myop.op_next = PL_op;	820	myop.op_next = PL_op;
535	myop.op_flags = OPf_WANT_VOID;	821	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
536
537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
538		822
539	PUSHMARK (SP);	823	PUSHMARK (SP);
		824	EXTEND (SP, 2);
		825	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	826	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
541	PUTBACK;	827	PUTBACK;
		828	PL_op = (OP *)&myop;
542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	829	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
543	SPAGAIN;	830	SPAGAIN;
544	}	831	}
545		832
		833	/*
		834	* this is a _very_ stripped down perl interpreter ;)
		835	*/
546	static void	836	static void
547	coro_run (void *arg)	837	coro_run (void *arg)
548	{	838	{
		839	dTHX;
		840
549	/* coro_run is the alternative epilogue of transfer() */	841	/* coro_run is the alternative tail of transfer(), so unlock here. */
550	UNLOCK;	842	UNLOCK;
551		843
		844	/* we now skip the entersub that lead to transfer() */
		845	PL_op = PL_op->op_next;
		846
		847	/* inject a fake subroutine call to cctx_init */
		848	prepare_cctx (aTHX_ (coro_cctx *)arg);
		849
		850	/* somebody or something will hit me for both perl_run and PL_restartop */
		851	PL_restartop = PL_op;
		852	perl_run (PL_curinterp);
		853
552	/*	854	/*
553	* this is a _very_ stripped down perl interpreter ;)	855	* If perl-run returns we assume exit() was being called or the coro
		856	* fell off the end, which seems to be the only valid (non-bug)
		857	* reason for perl_run to return. We try to exit by jumping to the
		858	* bootstrap-time "top" top_env, as we cannot restore the "main"
		859	* coroutine as Coro has no such concept
554	*/	860	*/
555	PL_top_env = &PL_start_env;	861	PL_top_env = main_top_env;
556		862	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	}	863	}
566		864
567	static coro_cctx *	865	static coro_cctx *
568	cctx_new ()	866	cctx_new ()
569	{	867	{
570	coro_cctx *cctx;	868	coro_cctx *cctx;
		869	void *stack_start;
		870	size_t stack_size;
571		871
572	++cctx_count;	872	++cctx_count;
573		873
574	New (0, cctx, 1, coro_cctx);	874	Newz (0, cctx, 1, coro_cctx);
575		875
576	#if HAVE_MMAP	876	#if HAVE_MMAP
577		877
578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	878	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
579	/* mmap suppsedly does allocate-on-write for us */	879	/* 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);	880	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
581		881
582	if (cctx->sptr == (void *)-1)	882	if (cctx->sptr != (void *)-1)
583	{
584	perror ("FATAL: unable to mmap stack for coroutine");
585	_exit (EXIT_FAILURE);
586	}	883	{
587
588	# if STACKGUARD	884	# if CORO_STACKGUARD
589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	885	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
590	# endif	886	# endif
		887	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		888	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		889	cctx->flags |= CC_MAPPED;
		890	}
		891	else
		892	#endif
		893	{
		894	cctx->ssize = coro_stacksize * (long)sizeof (long);
		895	New (0, cctx->sptr, coro_stacksize, long);
591		896
592	#else
593
594	cctx->ssize = STACKSIZE * (long)sizeof (long);
595	New (0, cctx->sptr, STACKSIZE, long);
596
597	if (!cctx->sptr)	897	if (!cctx->sptr)
598	{	898	{
599	perror ("FATAL: unable to malloc stack for coroutine");	899	perror ("FATAL: unable to allocate stack for coroutine");
600	_exit (EXIT_FAILURE);	900	_exit (EXIT_FAILURE);
601	}	901	}
602		902
603	#endif	903	stack_start = cctx->sptr;
		904	stack_size = cctx->ssize;
		905	}
604		906
605	#if USE_VALGRIND	907	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);	908	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
613		909
614	return cctx;	910	return cctx;
615	}	911	}
616		912
617	static void	913	static void
618	cctx_free (coro_cctx *cctx)	914	cctx_destroy (coro_cctx *cctx)
619	{	915	{
620	if (!cctx)	916	if (!cctx)
621	return;	917	return;
622		918
623	--cctx_count;	919	--cctx_count;
624		920
625	#if USE_VALGRIND	921	#if CORO_USE_VALGRIND
626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	922	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
627	#endif	923	#endif
628		924
629	#if HAVE_MMAP	925	#if HAVE_MMAP
		926	if (cctx->flags & CC_MAPPED)
630	munmap (cctx->sptr, cctx->ssize);	927	munmap (cctx->sptr, cctx->ssize);
631	#else	928	else
		929	#endif
632	Safefree (cctx->sptr);	930	Safefree (cctx->sptr);
633	#endif
634		931
635	Safefree (cctx);	932	Safefree (cctx);
636	}	933	}
637		934
		935	/* wether this cctx should be destructed */
		936	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		937
638	static coro_cctx *	938	static coro_cctx *
639	cctx_get ()	939	cctx_get (pTHX)
640	{	940	{
641	coro_cctx *cctx;
642
643	if (cctx_first)	941	while (cctx_first)
644	{	942	{
		943	coro_cctx *cctx = cctx_first;
		944	cctx_first = cctx->next;
645	--cctx_idle;	945	--cctx_idle;
646	cctx = cctx_first;	946
647	cctx_first = cctx->next;	947	if (!CCTX_EXPIRED (cctx))
648	}	948	return cctx;
649	else	949
650	{	950	cctx_destroy (cctx);
651	cctx = cctx_new ();
652	PL_op = PL_op->op_next;
653	}	951	}
654		952
655	return cctx;	953	return cctx_new ();
656	}	954	}
657		955
658	static void	956	static void
659	cctx_put (coro_cctx *cctx)	957	cctx_put (coro_cctx *cctx)
660	{	958	{
		959	/* free another cctx if overlimit */
		960	if (cctx_idle >= MAX_IDLE_CCTX)
		961	{
		962	coro_cctx *first = cctx_first;
		963	cctx_first = first->next;
		964	--cctx_idle;
		965
		966	cctx_destroy (first);
		967	}
		968
661	++cctx_idle;	969	++cctx_idle;
662	cctx->next = cctx_first;	970	cctx->next = cctx_first;
663	cctx_first = cctx;	971	cctx_first = cctx;
664	}	972	}
665		973
666	/* never call directly, always through the coro_state_transfer global variable */	974	/** coroutine switching *****************************************************/
		975
667	static void NOINLINE	976	static void NOINLINE
		977	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		978	{
		979	if (prev != next)
		980	{
		981	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		982	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		983
		984	if (next->flags & CF_RUNNING)
		985	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		986
		987	if (next->flags & CF_DESTROYED)
		988	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		989
		990	if (PL_lex_state != LEX_NOTPARSING)
		991	croak ("Coro::State::transfer called while parsing, but this is not supported");
		992	}
		993	}
		994
		995	/* always use the TRANSFER macro */
		996	static void NOINLINE
668	transfer (struct coro *prev, struct coro *next, int flags)	997	transfer (pTHX_ struct coro *prev, struct coro *next)
669	{	998	{
670	dSTACKLEVEL;	999	dSTACKLEVEL;
671		1000
672	/* sometimes transfer is only called to set idle_sp */	1001	/* sometimes transfer is only called to set idle_sp */
673	if (flags == TRANSFER_SET_STACKLEVEL)	1002	if (!next)
		1003	{
674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1004	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1005	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1006	}
675	else if (prev != next)	1007	else if (prev != next)
676	{	1008	{
677	coro_cctx *prev__cctx;	1009	coro_cctx *prev__cctx;
678		1010
679	if (!prev->cctx)	1011	if (prev->flags & CF_NEW)
680	{	1012	{
681	/* create a new empty context */	1013	/* create a new empty context */
682	Newz (0, prev->cctx, 1, coro_cctx);	1014	Newz (0, prev->cctx, 1, coro_cctx);
683	prev->cctx->inuse = 1;	1015	prev->flags &= ~CF_NEW;
684	prev->flags |= CF_RUNNING;	1016	prev->flags |= CF_RUNNING;
685	}	1017	}
686
687	assert ( prev->flags & CF_RUNNING);
688	assert (!next->flags & CF_RUNNING);
689		1018
690	prev->flags &= ~CF_RUNNING;	1019	prev->flags &= ~CF_RUNNING;
691	next->flags |= CF_RUNNING;	1020	next->flags |= CF_RUNNING;
692		1021
693	LOCK;	1022	LOCK;
694		1023
695	if (next->mainstack)	1024	if (next->flags & CF_NEW)
696	{	1025	{
697	/* coroutine already started */	1026	/* need to start coroutine */
698	SAVE (prev, flags);	1027	next->flags &= ~CF_NEW;
699	LOAD (next);	1028	/* first get rid of the old state */
		1029	save_perl (aTHX_ prev);
		1030	/* setup coroutine call */
		1031	coro_setup (aTHX_ next);
700	}	1032	}
701	else	1033	else
702	{	1034	{
703	/* need to start coroutine */	1035	/* coroutine already started */
704	/* first get rid of the old state */	1036	save_perl (aTHX_ prev);
705	SAVE (prev, -1);	1037	load_perl (aTHX_ next);
706	/* setup coroutine call */
707	setup_coro (next);
708	/* need a stack */
709	assert (!next->stack);
710	next->cctx = 0;
711	}	1038	}
712		1039
713	prev__cctx = prev->cctx;	1040	prev__cctx = prev->cctx;
714		1041
715	/* possibly "free" the cctx */	1042	/* possibly "free" the cctx */
716	if (prev__cctx->idle_sp == STACKLEVEL)	1043	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
717	{	1044	{
718	assert (PL_top_env == prev__cctx->top_env);//D	1045	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1046	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1047
		1048	prev->cctx = 0;
		1049
		1050	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1051	if (CCTX_EXPIRED (prev__cctx))
		1052	next->cctx = cctx_get (aTHX);
		1053
719	cctx_put (prev__cctx);	1054	cctx_put (prev__cctx);
720	prev->cctx = 0;
721	}	1055	}
722		1056
		1057	++next->usecount;
		1058
723	if (!next->cctx)	1059	if (!next->cctx)
724	next->cctx = cctx_get ();	1060	next->cctx = cctx_get (aTHX);
725		1061
726	if (prev__cctx != next->cctx)	1062	if (prev__cctx != next->cctx)
727	{	1063	{
728	assert ( prev__cctx->inuse);
729	assert (!next->cctx->inuse);
730
731	prev__cctx->inuse = 0;
732	next->cctx->inuse = 1;
733
734	prev__cctx->top_env = PL_top_env;	1064	prev__cctx->top_env = PL_top_env;
735	PL_top_env = next->cctx->top_env;	1065	PL_top_env = next->cctx->top_env;
736	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1066	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
737	}	1067	}
738		1068
739	free_coro_mortal ();	1069	free_coro_mortal (aTHX);
740
741	UNLOCK;	1070	UNLOCK;
742	}	1071	}
743	}	1072	}
744		1073
745	struct transfer_args	1074	struct transfer_args
746	{	1075	{
747	struct coro *prev, *next;	1076	struct coro *prev, *next;
748	int flags;
749	};	1077	};
750		1078
751	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1079	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1080	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
752		1081
		1082	/** high level stuff ********************************************************/
		1083
753	static void	1084	static int
754	coro_state_destroy (struct coro *coro)	1085	coro_state_destroy (pTHX_ struct coro *coro)
755	{	1086	{
756	if (coro->refcnt--)	1087	if (coro->flags & CF_DESTROYED)
757	return;	1088	return 0;
		1089
		1090	coro->flags |= CF_DESTROYED;
		1091
		1092	if (coro->flags & CF_READY)
		1093	{
		1094	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1095	/* alternative: look through all ready queues and remove the coro */
		1096	LOCK;
		1097	--coro_nready;
		1098	UNLOCK;
		1099	}
		1100	else
		1101	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
758		1102
759	if (coro->mainstack && coro->mainstack != main_mainstack)	1103	if (coro->mainstack && coro->mainstack != main_mainstack)
760	{	1104	{
761	struct coro temp;	1105	struct coro temp;
762		1106
763	SAVE ((&temp), TRANSFER_SAVE_ALL);	1107	if (coro->flags & CF_RUNNING)
764	LOAD (coro);	1108	croak ("FATAL: tried to destroy currently running coroutine");
765		1109
766	coro_destroy_stacks ();	1110	save_perl (aTHX_ &temp);
		1111	load_perl (aTHX_ coro);
767		1112
		1113	coro_destroy (aTHX_ coro);
		1114
768	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1115	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
769		1116
770	coro->mainstack = 0;	1117	coro->mainstack = 0;
771	}	1118	}
772		1119
773	cctx_free (coro->cctx);	1120	cctx_destroy (coro->cctx);
774	SvREFCNT_dec (coro->args);	1121	SvREFCNT_dec (coro->args);
775	Safefree (coro);	1122
		1123	if (coro->next) coro->next->prev = coro->prev;
		1124	if (coro->prev) coro->prev->next = coro->next;
		1125	if (coro == coro_first) coro_first = coro->next;
		1126
		1127	return 1;
776	}	1128	}
777		1129
778	static int	1130	static int
779	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1131	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
780	{	1132	{
781	struct coro *coro = (struct coro *)mg->mg_ptr;	1133	struct coro *coro = (struct coro *)mg->mg_ptr;
782	mg->mg_ptr = 0;	1134	mg->mg_ptr = 0;
783		1135
		1136	coro->hv = 0;
		1137
		1138	if (--coro->refcnt < 0)
		1139	{
784	coro_state_destroy (coro);	1140	coro_state_destroy (aTHX_ coro);
		1141	Safefree (coro);
		1142	}
785		1143
786	return 0;	1144	return 0;
787	}	1145	}
788		1146
789	static int	1147	static int
…		…
796	return 0;	1154	return 0;
797	}	1155	}
798		1156
799	static MGVTBL coro_state_vtbl = {	1157	static MGVTBL coro_state_vtbl = {
800	0, 0, 0, 0,	1158	0, 0, 0, 0,
801	coro_state_clear,	1159	coro_state_free,
802	0,	1160	0,
803	#ifdef MGf_DUP	1161	#ifdef MGf_DUP
804	coro_state_dup,	1162	coro_state_dup,
805	#else	1163	#else
806	# define MGf_DUP 0	1164	# define MGf_DUP 0
807	#endif	1165	#endif
808	};	1166	};
809		1167
810	static struct coro *
811	SvSTATE (SV *coro)
812	{
813	HV *stash;
814	MAGIC *mg;
815
816	if (SvROK (coro))
817	coro = SvRV (coro);
818
819	stash = SvSTASH (coro);
820	if (stash != coro_stash && stash != coro_state_stash)
821	{
822	/* very slow, but rare, check */
823	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
824	croak ("Coro::State object required");
825	}
826
827	mg = SvMAGIC (coro);
828	assert (mg->mg_type == PERL_MAGIC_ext);
829	return (struct coro *)mg->mg_ptr;
830	}
831
832	static void	1168	static void
833	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1169	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
834	{	1170	{
835	ta->prev = SvSTATE (prev);	1171	ta->prev = SvSTATE (prev_sv);
836	ta->next = SvSTATE (next);	1172	ta->next = SvSTATE (next_sv);
837	ta->flags = flags;	1173	TRANSFER_CHECK (*ta);
838	}	1174	}
839		1175
840	static void	1176	static void
841	api_transfer (SV *prev, SV *next, int flags)	1177	api_transfer (SV *prev_sv, SV *next_sv)
842	{	1178	{
843	dTHX;	1179	dTHX;
844	struct transfer_args ta;	1180	struct transfer_args ta;
845		1181
846	prepare_transfer (&ta, prev, next, flags);	1182	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
847	TRANSFER (ta);	1183	TRANSFER (ta);
848	}	1184	}
849		1185
850	/** Coro ********************************************************************/	1186	/** Coro ********************************************************************/
851		1187
852	#define PRIO_MAX 3
853	#define PRIO_HIGH 1
854	#define PRIO_NORMAL 0
855	#define PRIO_LOW -1
856	#define PRIO_IDLE -3
857	#define PRIO_MIN -4
858
859	/* for Coro.pm */
860	static GV *coro_current, *coro_idle;
861	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
862	static int coro_nready;
863
864	static void	1188	static void
865	coro_enq (SV *sv)	1189	coro_enq (pTHX_ SV *coro_sv)
866	{	1190	{
867	int prio;
868
869	if (SvTYPE (sv) != SVt_PVHV)
870	croak ("Coro::ready tried to enqueue something that is not a coroutine");
871
872	prio = SvSTATE (sv)->prio;
873
874	av_push (coro_ready [prio - PRIO_MIN], sv);	1191	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
875	coro_nready++;
876	}	1192	}
877		1193
878	static SV *	1194	static SV *
879	coro_deq (int min_prio)	1195	coro_deq (pTHX_ int min_prio)
880	{	1196	{
881	int prio = PRIO_MAX - PRIO_MIN;	1197	int prio = PRIO_MAX - PRIO_MIN;
882		1198
883	min_prio -= PRIO_MIN;	1199	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	1200	if (min_prio < 0)
885	min_prio = 0;	1201	min_prio = 0;
886		1202
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1203	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (AvFILLp (coro_ready [prio]) >= 0)	1204	if (AvFILLp (coro_ready [prio]) >= 0)
889	{
890	coro_nready--;
891	return av_shift (coro_ready [prio]);	1205	return av_shift (coro_ready [prio]);
892	}
893		1206
894	return 0;	1207	return 0;
895	}	1208	}
896		1209
897	static int	1210	static int
898	api_ready (SV *coro_sv)	1211	api_ready (SV *coro_sv)
899	{	1212	{
		1213	dTHX;
900	struct coro *coro;	1214	struct coro *coro;
901		1215
902	if (SvROK (coro_sv))	1216	if (SvROK (coro_sv))
903	coro_sv = SvRV (coro_sv);	1217	coro_sv = SvRV (coro_sv);
904		1218
905	coro = SvSTATE (coro_sv);	1219	coro = SvSTATE (coro_sv);
		1220
906	if (coro->flags & CF_READY)	1221	if (coro->flags & CF_READY)
907	return 0;	1222	return 0;
908		1223
909	coro->flags |= CF_READY;	1224	coro->flags |= CF_READY;
910		1225
911	LOCK;	1226	LOCK;
912	coro_enq (SvREFCNT_inc (coro_sv));	1227	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1228	++coro_nready;
913	UNLOCK;	1229	UNLOCK;
914		1230
915	return 1;	1231	return 1;
916	}	1232	}
917		1233
918	static int	1234	static int
919	api_is_ready (SV *coro_sv)	1235	api_is_ready (SV *coro_sv)
920	{	1236	{
921	struct coro *coro;	1237	dTHX;
922
923	return !!(SvSTATE (coro_sv)->flags & CF_READY);	1238	return !!(SvSTATE (coro_sv)->flags & CF_READY);
924	}	1239	}
925		1240
926	static void	1241	static void
927	prepare_schedule (struct transfer_args *ta)	1242	prepare_schedule (pTHX_ struct transfer_args *ta)
928	{	1243	{
929	SV *current, *prev, *next;	1244	SV *prev_sv, *next_sv;
930
931	current = GvSV (coro_current);
932		1245
933	for (;;)	1246	for (;;)
934	{	1247	{
935	LOCK;	1248	LOCK;
936	next = coro_deq (PRIO_MIN);	1249	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1250
		1251	/* nothing to schedule: call the idle handler */
		1252	if (!next_sv)
		1253	{
		1254	dSP;
		1255	UNLOCK;
		1256
		1257	ENTER;
		1258	SAVETMPS;
		1259
		1260	PUSHMARK (SP);
		1261	PUTBACK;
		1262	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1263
		1264	FREETMPS;
		1265	LEAVE;
		1266	continue;
		1267	}
		1268
		1269	ta->next = SvSTATE (next_sv);
		1270
		1271	/* cannot transfer to destroyed coros, skip and look for next */
		1272	if (ta->next->flags & CF_DESTROYED)
		1273	{
		1274	UNLOCK;
		1275	SvREFCNT_dec (next_sv);
		1276	/* coro_nready is already taken care of by destroy */
		1277	continue;
		1278	}
		1279
		1280	--coro_nready;
937	UNLOCK;	1281	UNLOCK;
938
939	if (next)
940	break;	1282	break;
941
942	{
943	dSP;
944
945	ENTER;
946	SAVETMPS;
947
948	PUSHMARK (SP);
949	PUTBACK;
950	call_sv (GvSV (coro_idle), G_DISCARD);
951
952	FREETMPS;
953	LEAVE;
954	}	1283	}
955	}
956
957	prev = SvRV (current);
958	SvRV (current) = next;
959		1284
960	/* free this only after the transfer */	1285	/* free this only after the transfer */
		1286	prev_sv = SvRV (coro_current);
		1287	ta->prev = SvSTATE (prev_sv);
		1288	TRANSFER_CHECK (*ta);
		1289	assert (ta->next->flags & CF_READY);
		1290	ta->next->flags &= ~CF_READY;
		1291	SvRV_set (coro_current, next_sv);
		1292
961	LOCK;	1293	LOCK;
962	free_coro_mortal ();	1294	free_coro_mortal (aTHX);
		1295	coro_mortal = prev_sv;
963	UNLOCK;	1296	UNLOCK;
964	coro_mortal = prev;
965
966	ta->prev = SvSTATE (prev);
967	ta->next = SvSTATE (next);
968	ta->flags = TRANSFER_SAVE_ALL;
969
970	ta->next->flags &= ~CF_READY;
971	}	1297	}
972		1298
973	static void	1299	static void
974	prepare_cede (struct transfer_args *ta)	1300	prepare_cede (pTHX_ struct transfer_args *ta)
975	{	1301	{
976	api_ready (GvSV (coro_current));	1302	api_ready (coro_current);
977
978	prepare_schedule (ta);	1303	prepare_schedule (aTHX_ ta);
		1304	}
		1305
		1306	static int
		1307	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1308	{
		1309	if (coro_nready)
		1310	{
		1311	SV *prev = SvRV (coro_current);
		1312	prepare_schedule (aTHX_ ta);
		1313	api_ready (prev);
		1314	return 1;
		1315	}
		1316	else
		1317	return 0;
979	}	1318	}
980		1319
981	static void	1320	static void
982	api_schedule (void)	1321	api_schedule (void)
983	{	1322	{
984	dTHX;	1323	dTHX;
985	struct transfer_args ta;	1324	struct transfer_args ta;
986		1325
987	prepare_schedule (&ta);	1326	prepare_schedule (aTHX_ &ta);
988	TRANSFER (ta);	1327	TRANSFER (ta);
989	}	1328	}
990		1329
991	static void	1330	static int
992	api_cede (void)	1331	api_cede (void)
993	{	1332	{
994	dTHX;	1333	dTHX;
995	struct transfer_args ta;	1334	struct transfer_args ta;
996		1335
997	prepare_cede (&ta);	1336	prepare_cede (aTHX_ &ta);
		1337
		1338	if (ta.prev != ta.next)
		1339	{
998	TRANSFER (ta);	1340	TRANSFER (ta);
		1341	return 1;
		1342	}
		1343	else
		1344	return 0;
999	}	1345	}
1000		1346
		1347	static int
		1348	api_cede_notself (void)
		1349	{
		1350	dTHX;
		1351	struct transfer_args ta;
		1352
		1353	if (prepare_cede_notself (aTHX_ &ta))
		1354	{
		1355	TRANSFER (ta);
		1356	return 1;
		1357	}
		1358	else
		1359	return 0;
		1360	}
		1361
		1362	static void
		1363	api_trace (SV *coro_sv, int flags)
		1364	{
		1365	dTHX;
		1366	struct coro *coro = SvSTATE (coro_sv);
		1367
		1368	if (flags & CC_TRACE)
		1369	{
		1370	if (!coro->cctx)
		1371	coro->cctx = cctx_new ();
		1372	else if (!(coro->cctx->flags & CC_TRACE))
		1373	croak ("cannot enable tracing on coroutine with custom stack");
		1374
		1375	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1376	}
		1377	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1378	{
		1379	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1380
		1381	if (coro->flags & CF_RUNNING)
		1382	PL_runops = RUNOPS_DEFAULT;
		1383	else
		1384	coro->runops = RUNOPS_DEFAULT;
		1385	}
		1386	}
		1387
1001	MODULE = Coro::State PACKAGE = Coro::State	1388	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1002		1389
1003	PROTOTYPES: DISABLE	1390	PROTOTYPES: DISABLE
1004		1391
1005	BOOT:	1392	BOOT:
1006	{	1393	{
1007	#ifdef USE_ITHREADS	1394	#ifdef USE_ITHREADS
1008	MUTEX_INIT (&coro_mutex);	1395	MUTEX_INIT (&coro_mutex);
1009	#endif	1396	#endif
1010	BOOT_PAGESIZE;	1397	BOOT_PAGESIZE;
1011		1398
		1399	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1400	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1401
1012	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1402	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1013		1403
1014	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1404	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1015	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1405	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1016	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1406	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1407	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1017		1408
1018	main_mainstack = PL_mainstack;	1409	main_mainstack = PL_mainstack;
		1410	main_top_env = PL_top_env;
		1411
		1412	while (main_top_env->je_prev)
		1413	main_top_env = main_top_env->je_prev;
1019		1414
1020	coroapi.ver = CORO_API_VERSION;	1415	coroapi.ver = CORO_API_VERSION;
1021	coroapi.transfer = api_transfer;	1416	coroapi.transfer = api_transfer;
1022		1417
1023	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1418	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1030	struct coro *coro;	1425	struct coro *coro;
1031	HV *hv;	1426	HV *hv;
1032	int i;	1427	int i;
1033		1428
1034	Newz (0, coro, 1, struct coro);	1429	Newz (0, coro, 1, struct coro);
1035	coro->args = newAV ();	1430	coro->args = newAV ();
		1431	coro->flags = CF_NEW;
1036		1432
		1433	if (coro_first) coro_first->prev = coro;
		1434	coro->next = coro_first;
		1435	coro_first = coro;
		1436
1037	hv = newHV ();	1437	coro->hv = hv = newHV ();
1038	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1438	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1039	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1439	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1040		1440
		1441	av_extend (coro->args, items - 1);
1041	for (i = 1; i < items; i++)	1442	for (i = 1; i < items; i++)
1042	av_push (coro->args, newSVsv (ST (i)));	1443	av_push (coro->args, newSVsv (ST (i)));
1043	}	1444	}
1044	OUTPUT:	1445	OUTPUT:
1045	RETVAL	1446	RETVAL
1046		1447
		1448	# these not obviously related functions are all rolled into the same xs
		1449	# function to increase chances that they all will call transfer with the same
		1450	# stack offset
1047	void	1451	void
1048	_set_stacklevel (...)	1452	_set_stacklevel (...)
1049	ALIAS:	1453	ALIAS:
1050	Coro::State::transfer = 1	1454	Coro::State::transfer = 1
1051	Coro::schedule = 2	1455	Coro::schedule = 2
1052	Coro::cede = 3	1456	Coro::cede = 3
1053	Coro::Cont::yield = 4	1457	Coro::cede_notself = 4
1054	CODE:	1458	CODE:
1055	{	1459	{
1056	struct transfer_args ta;	1460	struct transfer_args ta;
1057		1461
1058	switch (ix)	1462	switch (ix)
1059	{	1463	{
1060	case 0:	1464	case 0:
1061	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1465	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1062	ta.next = 0;	1466	ta.next = 0;
1063	ta.flags = TRANSFER_SET_STACKLEVEL;
1064	break;	1467	break;
1065		1468
1066	case 1:	1469	case 1:
1067	if (items != 3)	1470	if (items != 2)
1068	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1471	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1069		1472
1070	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1473	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1071	break;	1474	break;
1072		1475
1073	case 2:	1476	case 2:
1074	prepare_schedule (&ta);	1477	prepare_schedule (aTHX_ &ta);
1075	break;	1478	break;
1076		1479
1077	case 3:	1480	case 3:
1078	prepare_cede (&ta);	1481	prepare_cede (aTHX_ &ta);
1079	break;	1482	break;
1080		1483
1081	case 4:	1484	case 4:
1082	{	1485	if (!prepare_cede_notself (aTHX_ &ta))
1083	SV *yieldstack;	1486	XSRETURN_EMPTY;
1084	SV *sv;
1085	AV *defav = GvAV (PL_defgv);
1086		1487
1087	yieldstack = *hv_fetch (
1088	(HV *)SvRV (GvSV (coro_current)),
1089	"yieldstack", sizeof ("yieldstack") - 1,
1090	0
1091	);
1092
1093	/* set up @_ -- ugly */
1094	av_clear (defav);
1095	av_fill (defav, items - 1);
1096	while (items--)
1097	av_store (defav, items, SvREFCNT_inc (ST(items)));
1098
1099	sv = av_pop ((AV *)SvRV (yieldstack));
1100	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1101	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1102	ta.flags = 0;
1103	SvREFCNT_dec (sv);
1104	}
1105	break;	1488	break;
1106
1107	}	1489	}
1108		1490
		1491	BARRIER;
1109	TRANSFER (ta);	1492	TRANSFER (ta);
1110	}
1111		1493
1112	void	1494	if (GIMME_V != G_VOID && ta.next != ta.prev)
1113	_clone_state_from (SV *dst, SV *src)	1495	XSRETURN_YES;
		1496	}
		1497
		1498	bool
		1499	_destroy (SV *coro_sv)
1114	CODE:	1500	CODE:
1115	{	1501	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1116	struct coro *coro_src = SvSTATE (src);	1502	OUTPUT:
1117		1503	RETVAL
1118	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1119
1120	++coro_src->refcnt;
1121	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1122	}
1123		1504
1124	void	1505	void
1125	_exit (code)	1506	_exit (code)
1126	int code	1507	int code
1127	PROTOTYPE: $	1508	PROTOTYPE: $
1128	CODE:	1509	CODE:
1129	_exit (code);	1510	_exit (code);
1130		1511
1131	int	1512	int
		1513	cctx_stacksize (int new_stacksize = 0)
		1514	CODE:
		1515	RETVAL = coro_stacksize;
		1516	if (new_stacksize)
		1517	coro_stacksize = new_stacksize;
		1518	OUTPUT:
		1519	RETVAL
		1520
		1521	int
1132	cctx_count ()	1522	cctx_count ()
1133	CODE:	1523	CODE:
1134	RETVAL = cctx_count;	1524	RETVAL = cctx_count;
1135	OUTPUT:	1525	OUTPUT:
1136	RETVAL	1526	RETVAL
…		…
1140	CODE:	1530	CODE:
1141	RETVAL = cctx_idle;	1531	RETVAL = cctx_idle;
1142	OUTPUT:	1532	OUTPUT:
1143	RETVAL	1533	RETVAL
1144		1534
		1535	void
		1536	list ()
		1537	PPCODE:
		1538	{
		1539	struct coro *coro;
		1540	for (coro = coro_first; coro; coro = coro->next)
		1541	if (coro->hv)
		1542	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1543	}
		1544
		1545	void
		1546	call (Coro::State coro, SV *coderef)
		1547	ALIAS:
		1548	eval = 1
		1549	CODE:
		1550	{
		1551	if (coro->mainstack)
		1552	{
		1553	struct coro temp;
		1554	Zero (&temp, 1, struct coro);
		1555
		1556	if (!(coro->flags & CF_RUNNING))
		1557	{
		1558	save_perl (aTHX_ &temp);
		1559	load_perl (aTHX_ coro);
		1560	}
		1561
		1562	{
		1563	dSP;
		1564	ENTER;
		1565	SAVETMPS;
		1566	PUSHMARK (SP);
		1567	PUTBACK;
		1568	if (ix)
		1569	eval_sv (coderef, 0);
		1570	else
		1571	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1572	SPAGAIN;
		1573	FREETMPS;
		1574	LEAVE;
		1575	PUTBACK;
		1576	}
		1577
		1578	if (!(coro->flags & CF_RUNNING))
		1579	{
		1580	save_perl (aTHX_ coro);
		1581	load_perl (aTHX_ &temp);
		1582	}
		1583	}
		1584	}
		1585
		1586	SV *
		1587	is_ready (Coro::State coro)
		1588	PROTOTYPE: $
		1589	ALIAS:
		1590	is_ready = CF_READY
		1591	is_running = CF_RUNNING
		1592	is_new = CF_NEW
		1593	is_destroyed = CF_DESTROYED
		1594	CODE:
		1595	RETVAL = boolSV (coro->flags & ix);
		1596	OUTPUT:
		1597	RETVAL
		1598
		1599	void
		1600	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1601
		1602	SV *
		1603	has_stack (Coro::State coro)
		1604	PROTOTYPE: $
		1605	CODE:
		1606	RETVAL = boolSV (!!coro->cctx);
		1607	OUTPUT:
		1608	RETVAL
		1609
		1610	int
		1611	is_traced (Coro::State coro)
		1612	PROTOTYPE: $
		1613	CODE:
		1614	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1615	OUTPUT:
		1616	RETVAL
		1617
		1618	IV
		1619	rss (Coro::State coro)
		1620	PROTOTYPE: $
		1621	ALIAS:
		1622	usecount = 1
		1623	CODE:
		1624	switch (ix)
		1625	{
		1626	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1627	case 1: RETVAL = coro->usecount; break;
		1628	}
		1629	OUTPUT:
		1630	RETVAL
		1631
		1632
1145	MODULE = Coro::State PACKAGE = Coro	1633	MODULE = Coro::State PACKAGE = Coro
1146		1634
1147	BOOT:	1635	BOOT:
1148	{	1636	{
1149	int i;	1637	int i;
		1638
		1639	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1640	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1641	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1642
		1643	coro_current = get_sv ("Coro::current", FALSE);
		1644	SvREADONLY_on (coro_current);
1150		1645
1151	coro_stash = gv_stashpv ("Coro", TRUE);	1646	coro_stash = gv_stashpv ("Coro", TRUE);
1152		1647
1153	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1648	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1154	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1649	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1155	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1650	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1156	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1651	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1157	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1652	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1158	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1653	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1159		1654
1160	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1161	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1162
1163	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1655	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1164	coro_ready[i] = newAV ();	1656	coro_ready[i] = newAV ();
1165		1657
1166	{	1658	{
1167	SV *sv = perl_get_sv("Coro::API", 1);	1659	SV *sv = perl_get_sv("Coro::API", 1);
1168		1660
1169	coroapi.schedule = api_schedule;	1661	coroapi.schedule = api_schedule;
1170	coroapi.cede = api_cede;	1662	coroapi.cede = api_cede;
		1663	coroapi.cede_notself = api_cede_notself;
1171	coroapi.ready = api_ready;	1664	coroapi.ready = api_ready;
1172	coroapi.is_ready = api_is_ready;	1665	coroapi.is_ready = api_is_ready;
1173	coroapi.nready = &coro_nready;	1666	coroapi.nready = &coro_nready;
1174	coroapi.current = coro_current;	1667	coroapi.current = coro_current;
1175		1668
1176	GCoroAPI = &coroapi;	1669	GCoroAPI = &coroapi;
1177	sv_setiv (sv, (IV)&coroapi);	1670	sv_setiv (sv, (IV)&coroapi);
1178	SvREADONLY_on (sv);	1671	SvREADONLY_on (sv);
1179	}	1672	}
1180	}	1673	}
		1674
		1675	void
		1676	_set_current (SV *current)
		1677	PROTOTYPE: $
		1678	CODE:
		1679	SvREFCNT_dec (SvRV (coro_current));
		1680	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1181		1681
1182	int	1682	int
1183	prio (Coro::State coro, int newprio = 0)	1683	prio (Coro::State coro, int newprio = 0)
1184	ALIAS:	1684	ALIAS:
1185	nice = 1	1685	nice = 1
…		…
1188	RETVAL = coro->prio;	1688	RETVAL = coro->prio;
1189		1689
1190	if (items > 1)	1690	if (items > 1)
1191	{	1691	{
1192	if (ix)	1692	if (ix)
1193	newprio += coro->prio;	1693	newprio = coro->prio - newprio;
1194		1694
1195	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1695	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1196	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1696	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1197		1697
1198	coro->prio = newprio;	1698	coro->prio = newprio;
1199	}	1699	}
1200	}	1700	}
		1701	OUTPUT:
		1702	RETVAL
1201		1703
1202	SV *	1704	SV *
1203	ready (SV *self)	1705	ready (SV *self)
1204	PROTOTYPE: $	1706	PROTOTYPE: $
1205	CODE:	1707	CODE:
1206	RETVAL = boolSV (api_ready (self));	1708	RETVAL = boolSV (api_ready (self));
1207	OUTPUT:	1709	OUTPUT:
1208	RETVAL	1710	RETVAL
1209		1711
1210	SV *
1211	is_ready (SV *self)
1212	PROTOTYPE: $
1213	CODE:
1214	RETVAL = boolSV (api_is_ready (self));
1215	OUTPUT:
1216	RETVAL
1217
1218	int	1712	int
1219	nready (...)	1713	nready (...)
1220	PROTOTYPE:	1714	PROTOTYPE:
1221	CODE:	1715	CODE:
1222	RETVAL = coro_nready;	1716	RETVAL = coro_nready;
1223	OUTPUT:	1717	OUTPUT:
1224	RETVAL	1718	RETVAL
1225		1719
		1720	# for async_pool speedup
		1721	void
		1722	_pool_1 (SV *cb)
		1723	CODE:
		1724	{
		1725	struct coro *coro = SvSTATE (coro_current);
		1726	HV *hv = (HV *)SvRV (coro_current);
		1727	AV *defav = GvAV (PL_defgv);
		1728	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1729	AV *invoke_av;
		1730	int i, len;
		1731
		1732	if (!invoke)
		1733	croak ("\3terminate\2\n");
		1734
		1735	SvREFCNT_dec (coro->saved_deffh);
		1736	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1737
		1738	hv_store (hv, "desc", sizeof ("desc") - 1,
		1739	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1740
		1741	invoke_av = (AV *)SvRV (invoke);
		1742	len = av_len (invoke_av);
		1743
		1744	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1745
		1746	if (len > 0)
		1747	{
		1748	av_fill (defav, len - 1);
		1749	for (i = 0; i < len; ++i)
		1750	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1751	}
		1752
		1753	SvREFCNT_dec (invoke);
		1754	}
		1755
		1756	void
		1757	_pool_2 (SV *cb)
		1758	CODE:
		1759	{
		1760	struct coro *coro = SvSTATE (coro_current);
		1761
		1762	sv_setsv (cb, &PL_sv_undef);
		1763
		1764	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1765	coro->saved_deffh = 0;
		1766
		1767	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1768	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1769	croak ("\3terminate\2\n");
		1770
		1771	av_clear (GvAV (PL_defgv));
		1772	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1773	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1774
		1775	coro->prio = 0;
		1776
		1777	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1778	api_trace (coro_current, 0);
		1779
		1780	av_push (av_async_pool, newSVsv (coro_current));
		1781	}
		1782
		1783
1226	MODULE = Coro::State PACKAGE = Coro::AIO	1784	MODULE = Coro::State PACKAGE = Coro::AIO
1227		1785
1228	SV *	1786	SV *
1229	_get_state ()	1787	_get_state ()
1230	CODE:	1788	CODE:
1231	{	1789	{
1232	struct {	1790	struct io_state *data;
1233	int errorno;
1234	int laststype;
1235	int laststatval;
1236	Stat_t statcache;
1237	} data;
1238		1791
		1792	RETVAL = newSV (sizeof (struct io_state));
		1793	data = (struct io_state *)SvPVX (RETVAL);
		1794	SvCUR_set (RETVAL, sizeof (struct io_state));
		1795	SvPOK_only (RETVAL);
		1796
1239	data.errorno = errno;	1797	data->errorno = errno;
1240	data.laststype = PL_laststype;	1798	data->laststype = PL_laststype;
1241	data.laststatval = PL_laststatval;	1799	data->laststatval = PL_laststatval;
1242	data.statcache = PL_statcache;	1800	data->statcache = PL_statcache;
1243
1244	RETVAL = newSVpvn ((char *)&data, sizeof data);
1245	}	1801	}
1246	OUTPUT:	1802	OUTPUT:
1247	RETVAL	1803	RETVAL
1248		1804
1249	void	1805	void
1250	_set_state (char *data_)	1806	_set_state (char *data_)
1251	PROTOTYPE: $	1807	PROTOTYPE: $
1252	CODE:	1808	CODE:
1253	{	1809	{
1254	struct {	1810	struct io_state *data = (void *)data_;
1255	int errorno;
1256	int laststype;
1257	int laststatval;
1258	Stat_t statcache;
1259	} *data = (void *)data_;
1260		1811
1261	errno = data->errorno;	1812	errno = data->errorno;
1262	PL_laststype = data->laststype;	1813	PL_laststype = data->laststype;
1263	PL_laststatval = data->laststatval;	1814	PL_laststatval = data->laststatval;
1264	PL_statcache = data->statcache;	1815	PL_statcache = data->statcache;
1265	}	1816	}
		1817

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