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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.119 by root, Sat Dec 2 15:41:28 2006 UTC vs.
Revision 1.177 by root, Tue Oct 2 10:24:44 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	/* the maximum number of idle cctx that will be pooled */
14	#define MAX_IDLE_CCTX 8
15
16	#define PERL_VERSION_ATLEAST(a,b,c) \
17	(PERL_REVISION > (a) \
18	|| (PERL_REVISION == (a) \
19	&& (PERL_VERSION > (b) \
20	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22	#if !PERL_VERSION_ATLEAST (5,6,0)
23	# ifndef PL_ppaddr
24	# define PL_ppaddr ppaddr
25	# endif
26	# ifndef call_sv
27	# define call_sv perl_call_sv
28	# endif
29	# ifndef get_sv
30	# define get_sv perl_get_sv
31	# endif
32	# ifndef get_cv
33	# define get_cv perl_get_cv
34	# endif
35	# ifndef IS_PADGV
36	# define IS_PADGV(v) 0
37	# endif
38	# ifndef IS_PADCONST
39	# define IS_PADCONST(v) 0
40	# endif
41	#endif
42
43	#include <stdio.h>	11	#include <stdio.h>
44	#include <errno.h>	12	#include <errno.h>
45		13	#include <assert.h>
46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	# undef STACKGUARD
48	#endif
49
50	#ifndef STACKGUARD
51	# define STACKGUARD 0
52	#endif
53		14
54	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
55	# include <unistd.h>	16	# include <unistd.h>
56	# include <sys/mman.h>	17	# include <sys/mman.h>
57	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
72	#else	33	#else
73	# define PAGESIZE 0	34	# define PAGESIZE 0
74	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
75	#endif	36	#endif
76		37
77	/* The next macro should declare a variable stacklevel that contains and approximation	38	#if CORO_USE_VALGRIND
78	* to the current C stack pointer. Its property is that it changes with each call	39	# include <valgrind/valgrind.h>
79	* and should be unique. */	40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
		55	# ifndef PL_ppaddr
		56	# define PL_ppaddr ppaddr
		57	# endif
		58	# ifndef call_sv
		59	# define call_sv perl_call_sv
		60	# endif
		61	# ifndef get_sv
		62	# define get_sv perl_get_sv
		63	# endif
		64	# ifndef get_cv
		65	# define get_cv perl_get_cv
		66	# endif
		67	# ifndef IS_PADGV
		68	# define IS_PADGV(v) 0
		69	# endif
		70	# ifndef IS_PADCONST
		71	# define IS_PADCONST(v) 0
		72	# endif
		73	#endif
		74
		75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		81	# undef CORO_STACKGUARD
		82	#endif
		83
		84	#ifndef CORO_STACKGUARD
		85	# define CORO_STACKGUARD 0
		86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
		93	/* The next macros try to return the current stack pointer, in an as
		94	* portable way as possible. */
80	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
81	#define STACKLEVEL ((void *)&stacklevel)	96	#define STACKLEVEL ((void *)&stacklevel)
82		97
83	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
84		99
85	#if __GNUC__ >= 3	100	#if __GNUC__ >= 3
86	# define attribute(x) __attribute__(x)	101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
87	#else	103	#else
88	# define attribute(x)	104	# define attribute(x)
		105	# define BARRIER
89	#endif	106	#endif
90		107
91	#define NOINLINE attribute ((noinline))	108	#define NOINLINE attribute ((noinline))
92		109
93	#include "CoroAPI.h"	110	#include "CoroAPI.h"
94
95	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96		111
97	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
98	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
99	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
100	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
101	#else	116	#else
102	# define LOCK (void)0	117	# define LOCK (void)0
103	# define UNLOCK (void)0	118	# define UNLOCK (void)0
104	#endif	119	#endif
105		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
106	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
107	static AV *main_mainstack; /* used to differentiate between $main and others */	132	static AV *main_mainstack; /* used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
108	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
109	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
110		136
		137	/* async_pool helper stuff */
		138	static SV *sv_pool_rss;
		139	static SV *sv_pool_size;
		140	static AV *av_async_pool;
		141
111	static struct coro_cctx *cctx_first;	142	static struct coro_cctx *cctx_first;
112	static int cctx_count, cctx_idle;	143	static int cctx_count, cctx_idle;
		144
		145	enum {
		146	CC_MAPPED = 0x01,
		147	CC_NOREUSE = 0x02, /* throw this away after tracing */
		148	CC_TRACE = 0x04,
		149	CC_TRACE_SUB = 0x08, /* trace sub calls */
		150	CC_TRACE_LINE = 0x10, /* trace each statement */
		151	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		152	};
113		153
114	/* this is a structure representing a c-level coroutine */	154	/* this is a structure representing a c-level coroutine */
115	typedef struct coro_cctx {	155	typedef struct coro_cctx {
116	struct coro_cctx *next;	156	struct coro_cctx *next;
117		157
118	/* the stack */	158	/* the stack */
119	void *sptr;	159	void *sptr;
120	long ssize; /* positive == mmap, otherwise malloc */	160	size_t ssize;
121		161
122	/* cpu state */	162	/* cpu state */
123	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	163	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		164	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
124	JMPENV *top_env;	165	JMPENV *top_env;
125	coro_context cctx;	166	coro_context cctx;
126		167
127	int inuse;
128
129	#if USE_VALGRIND	168	#if CORO_USE_VALGRIND
130	int valgrind_id;	169	int valgrind_id;
131	#endif	170	#endif
		171	unsigned char flags;
132	} coro_cctx;	172	} coro_cctx;
133		173
134	enum {	174	enum {
135	CF_RUNNING = 0x0001, /* coroutine is running */	175	CF_RUNNING = 0x0001, /* coroutine is running */
136	CF_READY = 0x0002, /* coroutine is ready */	176	CF_READY = 0x0002, /* coroutine is ready */
137	CF_NEW = 0x0004, /* ahs never been switched to */	177	CF_NEW = 0x0004, /* has never been switched to */
		178	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
138	};	179	};
139		180
140	/* this is a structure representing a perl-level coroutine */	181	/* this is a structure representing a perl-level coroutine */
141	struct coro {	182	struct coro {
142	/* the c coroutine allocated to this perl coroutine, if any */	183	/* the c coroutine allocated to this perl coroutine, if any */
143	coro_cctx *cctx;	184	coro_cctx *cctx;
144		185
145	/* data associated with this coroutine (initial args) */	186	/* data associated with this coroutine (initial args) */
146	AV *args;	187	AV *args;
147	int refcnt;	188	int refcnt;
148	int flags;	189	int save; /* CORO_SAVE flags */
		190	int flags; /* CF_ flags */
149		191
150	/* optionally saved, might be zero */	192	/* optionally saved, might be zero */
151	AV *defav;	193	AV *defav; /* @_ */
152	SV *defsv;	194	SV *defsv; /* $_ */
153	SV *errsv;	195	SV *errsv; /* $@ */
		196	GV *deffh; /* default filehandle */
		197	SV *irssv; /* $/ */
		198	SV *irssv_sv; /* real $/ cache */
154		199
155	#define VAR(name,type) type name;	200	#define VAR(name,type) type name;
156	# include "state.h"	201	# include "state.h"
157	#undef VAR	202	#undef VAR
158		203
		204	/* statistics */
		205	int usecount; /* number of switches to this coro */
		206
159	/* coro process data */	207	/* coro process data */
160	int prio;	208	int prio;
		209
		210	/* linked list */
		211	struct coro *next, *prev;
		212	HV *hv; /* the perl hash associated with this coro, if any */
161	};	213	};
162		214
163	typedef struct coro *Coro__State;	215	typedef struct coro *Coro__State;
164	typedef struct coro *Coro__State_or_hashref;	216	typedef struct coro *Coro__State_or_hashref;
165		217
		218	/** Coro ********************************************************************/
		219
		220	#define PRIO_MAX 3
		221	#define PRIO_HIGH 1
		222	#define PRIO_NORMAL 0
		223	#define PRIO_LOW -1
		224	#define PRIO_IDLE -3
		225	#define PRIO_MIN -4
		226
		227	/* for Coro.pm */
		228	static SV *coro_current;
		229	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		230	static int coro_nready;
		231	static struct coro *coro_first;
		232
		233	/** lowlevel stuff **********************************************************/
		234
166	static AV *	235	static AV *
167	coro_clone_padlist (CV *cv)	236	coro_clone_padlist (pTHX_ CV *cv)
168	{	237	{
169	AV *padlist = CvPADLIST (cv);	238	AV *padlist = CvPADLIST (cv);
170	AV *newpadlist, *newpad;	239	AV *newpadlist, *newpad;
171		240
172	newpadlist = newAV ();	241	newpadlist = newAV ();
…		…
184		253
185	return newpadlist;	254	return newpadlist;
186	}	255	}
187		256
188	static void	257	static void
189	free_padlist (AV *padlist)	258	free_padlist (pTHX_ AV *padlist)
190	{	259	{
191	/* may be during global destruction */	260	/* may be during global destruction */
192	if (SvREFCNT (padlist))	261	if (SvREFCNT (padlist))
193	{	262	{
194	I32 i = AvFILLp (padlist);	263	I32 i = AvFILLp (padlist);
…		…
215	AV *padlist;	284	AV *padlist;
216	AV *av = (AV *)mg->mg_obj;	285	AV *av = (AV *)mg->mg_obj;
217		286
218	/* casting is fun. */	287	/* casting is fun. */
219	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	288	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
220	free_padlist (padlist);	289	free_padlist (aTHX_ padlist);
221		290
222	SvREFCNT_dec (av);	291	SvREFCNT_dec (av);
223		292
224	return 0;	293	return 0;
225	}	294	}
…		…
233	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	302	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
234	? SvMAGIC (cv) \	303	? SvMAGIC (cv) \
235	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	304	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
236	: 0	305	: 0
237		306
		307	static struct coro *
		308	SvSTATE_ (pTHX_ SV *coro)
		309	{
		310	HV *stash;
		311	MAGIC *mg;
		312
		313	if (SvROK (coro))
		314	coro = SvRV (coro);
		315
		316	if (SvTYPE (coro) != SVt_PVHV)
		317	croak ("Coro::State object required");
		318
		319	stash = SvSTASH (coro);
		320	if (stash != coro_stash && stash != coro_state_stash)
		321	{
		322	/* very slow, but rare, check */
		323	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		324	croak ("Coro::State object required");
		325	}
		326
		327	mg = CORO_MAGIC (coro);
		328	return (struct coro *)mg->mg_ptr;
		329	}
		330
		331	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		332
238	/* the next two functions merely cache the padlists */	333	/* the next two functions merely cache the padlists */
239	static void	334	static void
240	get_padlist (CV *cv)	335	get_padlist (pTHX_ CV *cv)
241	{	336	{
242	MAGIC *mg = CORO_MAGIC (cv);	337	MAGIC *mg = CORO_MAGIC (cv);
243	AV *av;	338	AV *av;
244		339
245	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	340	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
246	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	341	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
247	else	342	else
248	{	343	{
249	#if 0	344	#if CORO_PREFER_PERL_FUNCTIONS
250	/* this is probably cleaner, but also slower? */	345	/* this is probably cleaner, but also slower? */
251	CV *cp = Perl_cv_clone (cv);	346	CV *cp = Perl_cv_clone (cv);
252	CvPADLIST (cv) = CvPADLIST (cp);	347	CvPADLIST (cv) = CvPADLIST (cp);
253	CvPADLIST (cp) = 0;	348	CvPADLIST (cp) = 0;
254	SvREFCNT_dec (cp);	349	SvREFCNT_dec (cp);
255	#else	350	#else
256	CvPADLIST (cv) = coro_clone_padlist (cv);	351	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
257	#endif	352	#endif
258	}	353	}
259	}	354	}
260		355
261	static void	356	static void
262	put_padlist (CV *cv)	357	put_padlist (pTHX_ CV *cv)
263	{	358	{
264	MAGIC *mg = CORO_MAGIC (cv);	359	MAGIC *mg = CORO_MAGIC (cv);
265	AV *av;	360	AV *av;
266		361
267	if (!mg)	362	if (!mg)
…		…
278	av_extend (av, AvMAX (av) + 1);	373	av_extend (av, AvMAX (av) + 1);
279		374
280	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	375	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
281	}	376	}
282		377
		378	/** load & save, init *******************************************************/
		379
283	#define SB do {	380	#define SB do {
284	#define SE } while (0)	381	#define SE } while (0)
285		382
286	#define LOAD(state) load_state ((state))
287	#define SAVE(state,flags) save_state ((state),(flags))
288
289	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE	383	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
290		384
291	static void	385	static void
292	load_state (Coro__State c)	386	load_perl (pTHX_ Coro__State c)
293	{	387	{
294	#define VAR(name,type) PL_ ## name = c->name;	388	#define VAR(name,type) PL_ ## name = c->name;
295	# include "state.h"	389	# include "state.h"
296	#undef VAR	390	#undef VAR
297		391
298	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	392	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
299	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	393	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
300	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	394	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		395	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		396
		397	if (c->irssv)
		398	{
		399	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		400	{
		401	SvREFCNT_dec (c->irssv);
		402	c->irssv = 0;
		403	}
		404	else
		405	{
		406	REPLACE_SV (PL_rs, c->irssv);
		407	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		408	sv_setsv (c->irssv_sv, PL_rs);
		409	}
		410	}
301		411
302	{	412	{
303	dSP;	413	dSP;
304	CV *cv;	414	CV *cv;
305		415
306	/* now do the ugly restore mess */	416	/* now do the ugly restore mess */
307	while ((cv = (CV *)POPs))	417	while ((cv = (CV *)POPs))
308	{	418	{
309	put_padlist (cv); /* mark this padlist as available */	419	put_padlist (aTHX_ cv); /* mark this padlist as available */
310	CvDEPTH (cv) = PTR2IV (POPs);	420	CvDEPTH (cv) = PTR2IV (POPs);
311	CvPADLIST (cv) = (AV *)POPs;	421	CvPADLIST (cv) = (AV *)POPs;
312	}	422	}
313		423
314	PUTBACK;	424	PUTBACK;
315	}	425	}
316	}	426	}
317		427
318	static void	428	static void
319	save_state (Coro__State c, int flags)	429	save_perl (pTHX_ Coro__State c)
320	{	430	{
321	{	431	{
322	dSP;	432	dSP;
323	I32 cxix = cxstack_ix;	433	I32 cxix = cxstack_ix;
324	PERL_CONTEXT *ccstk = cxstack;	434	PERL_CONTEXT *ccstk = cxstack;
…		…
327	/*	437	/*
328	* the worst thing you can imagine happens first - we have to save	438	* the worst thing you can imagine happens first - we have to save
329	* (and reinitialize) all cv's in the whole callchain :(	439	* (and reinitialize) all cv's in the whole callchain :(
330	*/	440	*/
331		441
332	PUSHs (Nullsv);	442	XPUSHs (Nullsv);
333	/* this loop was inspired by pp_caller */	443	/* this loop was inspired by pp_caller */
334	for (;;)	444	for (;;)
335	{	445	{
336	while (cxix >= 0)	446	while (cxix >= 0)
337	{	447	{
338	PERL_CONTEXT *cx = &ccstk[cxix--];	448	PERL_CONTEXT *cx = &ccstk[cxix--];
339		449
340	if (CxTYPE (cx) == CXt_SUB)	450	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
341	{	451	{
342	CV *cv = cx->blk_sub.cv;	452	CV *cv = cx->blk_sub.cv;
343		453
344	if (CvDEPTH (cv))	454	if (CvDEPTH (cv))
345	{	455	{
346	EXTEND (SP, 3);	456	EXTEND (SP, 3);
347
348	PUSHs ((SV *)CvPADLIST (cv));	457	PUSHs ((SV *)CvPADLIST (cv));
349	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	458	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
350	PUSHs ((SV *)cv);	459	PUSHs ((SV *)cv);
351		460
352	CvDEPTH (cv) = 0;	461	CvDEPTH (cv) = 0;
353	get_padlist (cv);	462	get_padlist (aTHX_ cv);
354	}	463	}
355	}	464	}
356	#ifdef CXt_FORMAT
357	else if (CxTYPE (cx) == CXt_FORMAT)
358	{
359	/* I never used formats, so how should I know how these are implemented? */
360	/* my bold guess is as a simple, plain sub... */
361	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
362	}
363	#endif
364	}	465	}
365		466
366	if (top_si->si_type == PERLSI_MAIN)	467	if (top_si->si_type == PERLSI_MAIN)
367	break;	468	break;
368		469
369	top_si = top_si->si_prev;	470	top_si = top_si->si_prev;
370	ccstk = top_si->si_cxstack;	471	ccstk = top_si->si_cxstack;
371	cxix = top_si->si_cxix;	472	cxix = top_si->si_cxix;
372	}	473	}
373		474
374	PUTBACK;	475	PUTBACK;
375	}	476	}
376		477
377	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	478	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
378	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	479	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
379	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	480	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		481	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		482	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
380		483
381	#define VAR(name,type)c->name = PL_ ## name;	484	#define VAR(name,type)c->name = PL_ ## name;
382	# include "state.h"	485	# include "state.h"
383	#undef VAR	486	#undef VAR
384	}	487	}
…		…
387	* allocate various perl stacks. This is an exact copy	490	* allocate various perl stacks. This is an exact copy
388	* of perl.c:init_stacks, except that it uses less memory	491	* of perl.c:init_stacks, except that it uses less memory
389	* on the (sometimes correct) assumption that coroutines do	492	* on the (sometimes correct) assumption that coroutines do
390	* not usually need a lot of stackspace.	493	* not usually need a lot of stackspace.
391	*/	494	*/
		495	#if CORO_PREFER_PERL_FUNCTIONS
		496	# define coro_init_stacks init_stacks
		497	#else
392	static void	498	static void
393	coro_init_stacks ()	499	coro_init_stacks (pTHX)
394	{	500	{
395	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	501	PL_curstackinfo = new_stackinfo(64, 6);
396	PL_curstackinfo->si_type = PERLSI_MAIN;	502	PL_curstackinfo->si_type = PERLSI_MAIN;
397	PL_curstack = PL_curstackinfo->si_stack;	503	PL_curstack = PL_curstackinfo->si_stack;
398	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	504	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
399		505
400	PL_stack_base = AvARRAY(PL_curstack);	506	PL_stack_base = AvARRAY(PL_curstack);
401	PL_stack_sp = PL_stack_base;	507	PL_stack_sp = PL_stack_base;
402	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	508	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
403		509
404	New(50,PL_tmps_stack,128,SV*);	510	New(50,PL_tmps_stack,64,SV*);
405	PL_tmps_floor = -1;	511	PL_tmps_floor = -1;
406	PL_tmps_ix = -1;	512	PL_tmps_ix = -1;
407	PL_tmps_max = 128;	513	PL_tmps_max = 64;
408		514
409	New(54,PL_markstack,32,I32);	515	New(54,PL_markstack,16,I32);
410	PL_markstack_ptr = PL_markstack;	516	PL_markstack_ptr = PL_markstack;
411	PL_markstack_max = PL_markstack + 32;	517	PL_markstack_max = PL_markstack + 16;
412		518
413	#ifdef SET_MARK_OFFSET	519	#ifdef SET_MARK_OFFSET
414	SET_MARK_OFFSET;	520	SET_MARK_OFFSET;
415	#endif	521	#endif
416		522
417	New(54,PL_scopestack,32,I32);	523	New(54,PL_scopestack,16,I32);
418	PL_scopestack_ix = 0;	524	PL_scopestack_ix = 0;
419	PL_scopestack_max = 32;	525	PL_scopestack_max = 16;
420		526
421	New(54,PL_savestack,64,ANY);	527	New(54,PL_savestack,64,ANY);
422	PL_savestack_ix = 0;	528	PL_savestack_ix = 0;
423	PL_savestack_max = 64;	529	PL_savestack_max = 64;
424		530
425	#if !PERL_VERSION_ATLEAST (5,9,0)	531	#if !PERL_VERSION_ATLEAST (5,9,0)
426	New(54,PL_retstack,16,OP*);	532	New(54,PL_retstack,4,OP*);
427	PL_retstack_ix = 0;	533	PL_retstack_ix = 0;
428	PL_retstack_max = 16;	534	PL_retstack_max = 4;
429	#endif	535	#endif
430	}	536	}
		537	#endif
431		538
432	/*	539	/*
433	* destroy the stacks, the callchain etc...	540	* destroy the stacks, the callchain etc...
434	*/	541	*/
435	static void	542	static void
436	coro_destroy_stacks ()	543	coro_destroy_stacks (pTHX)
437	{	544	{
438	if (!IN_DESTRUCT)	545	if (!IN_DESTRUCT)
439	{	546	{
440	/* is this ugly, I ask? */	547	/* restore all saved variables and stuff */
441	LEAVE_SCOPE (0);	548	LEAVE_SCOPE (0);
		549	assert (PL_tmps_floor == -1);
442		550
443	/* sure it is, but more important: is it correct?? :/ */	551	/* free all temporaries */
444	FREETMPS;	552	FREETMPS;
		553	assert (PL_tmps_ix == -1);
445		554
		555	/* unwind all extra stacks */
446	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	556	POPSTACK_TO (PL_mainstack);
		557
		558	/* unwind main stack */
		559	dounwind (-1);
447	}	560	}
448		561
449	while (PL_curstackinfo->si_next)	562	while (PL_curstackinfo->si_next)
450	PL_curstackinfo = PL_curstackinfo->si_next;	563	PL_curstackinfo = PL_curstackinfo->si_next;
451		564
452	while (PL_curstackinfo)	565	while (PL_curstackinfo)
453	{	566	{
454	PERL_SI *p = PL_curstackinfo->si_prev;	567	PERL_SI *p = PL_curstackinfo->si_prev;
455		568
456	{ /*D*//*remove*/
457	dSP;
458	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
459	PUTBACK; /* possibly superfluous */
460	}
461
462	if (!IN_DESTRUCT)	569	if (!IN_DESTRUCT)
463	{
464	dounwind (-1);/*D*//*remove*/
465	SvREFCNT_dec (PL_curstackinfo->si_stack);	570	SvREFCNT_dec (PL_curstackinfo->si_stack);
466	}
467		571
468	Safefree (PL_curstackinfo->si_cxstack);	572	Safefree (PL_curstackinfo->si_cxstack);
469	Safefree (PL_curstackinfo);	573	Safefree (PL_curstackinfo);
470	PL_curstackinfo = p;	574	PL_curstackinfo = p;
471	}	575	}
…		…
477	#if !PERL_VERSION_ATLEAST (5,9,0)	581	#if !PERL_VERSION_ATLEAST (5,9,0)
478	Safefree (PL_retstack);	582	Safefree (PL_retstack);
479	#endif	583	#endif
480	}	584	}
481		585
		586	static size_t
		587	coro_rss (pTHX_ struct coro *coro)
		588	{
		589	size_t rss = sizeof (coro);
		590
		591	if (coro->mainstack)
		592	{
		593	if (coro->flags & CF_RUNNING)
		594	{
		595	#define VAR(name,type)coro->name = PL_ ## name;
		596	# include "state.h"
		597	#undef VAR
		598	}
		599
		600	rss += sizeof (coro->curstackinfo);
		601	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		602	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		603	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		604	rss += coro->tmps_max * sizeof (SV *);
		605	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		606	rss += coro->scopestack_max * sizeof (I32);
		607	rss += coro->savestack_max * sizeof (ANY);
		608
		609	#if !PERL_VERSION_ATLEAST (5,9,0)
		610	rss += coro->retstack_max * sizeof (OP *);
		611	#endif
		612	}
		613
		614	return rss;
		615	}
		616
		617	/** coroutine stack handling ************************************************/
		618
482	static void	619	static void
483	setup_coro (struct coro *coro)	620	setup_coro (pTHX_ struct coro *coro)
484	{	621	{
485	/*	622	/*
486	* emulate part of the perl startup here.	623	* emulate part of the perl startup here.
487	*/	624	*/
488
489	coro_init_stacks ();	625	coro_init_stacks (aTHX);
490		626
		627	PL_runops = RUNOPS_DEFAULT;
491	PL_curcop = &PL_compiling;	628	PL_curcop = &PL_compiling;
492	PL_in_eval = EVAL_NULL;	629	PL_in_eval = EVAL_NULL;
		630	PL_comppad = 0;
493	PL_curpm = 0;	631	PL_curpm = 0;
494	PL_localizing = 0;	632	PL_localizing = 0;
495	PL_dirty = 0;	633	PL_dirty = 0;
496	PL_restartop = 0;	634	PL_restartop = 0;
497		635
498	{	636	{
499	dSP;	637	dSP;
500	LOGOP myop;	638	LOGOP myop;
501		639
502	/* I have no idea why this is needed, but it is */
503	PUSHMARK (SP);
504
505	SvREFCNT_dec (GvAV (PL_defgv));	640	SvREFCNT_dec (GvAV (PL_defgv));
506	GvAV (PL_defgv) = coro->args; coro->args = 0;	641	GvAV (PL_defgv) = coro->args; coro->args = 0;
507		642
508	Zero (&myop, 1, LOGOP);	643	Zero (&myop, 1, LOGOP);
509	myop.op_next = Nullop;	644	myop.op_next = Nullop;
510	myop.op_flags = OPf_WANT_VOID;	645	myop.op_flags = OPf_WANT_VOID;
511		646
		647	PUSHMARK (SP);
		648	XPUSHs (av_shift (GvAV (PL_defgv)));
		649	PUTBACK;
512	PL_op = (OP *)&myop;	650	PL_op = (OP *)&myop;
513
514	PUSHMARK (SP);
515	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
516	PUTBACK;
517	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	651	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
518	SPAGAIN;	652	SPAGAIN;
519	}	653	}
520		654
521	ENTER; /* necessary e.g. for dounwind */	655	ENTER; /* necessary e.g. for dounwind */
522	}	656	}
523		657
524	static void	658	static void
525	free_coro_mortal ()	659	free_coro_mortal (pTHX)
526	{	660	{
527	if (coro_mortal)	661	if (coro_mortal)
528	{	662	{
529	SvREFCNT_dec (coro_mortal);	663	SvREFCNT_dec (coro_mortal);
530	coro_mortal = 0;	664	coro_mortal = 0;
531	}	665	}
532	}	666	}
533		667
		668	static int
		669	runops_trace (pTHX)
		670	{
		671	COP *oldcop = 0;
		672	int oldcxix = -2;
		673	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		674	coro_cctx *cctx = coro->cctx;
		675
		676	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		677	{
		678	PERL_ASYNC_CHECK ();
		679
		680	if (cctx->flags & CC_TRACE_ALL)
		681	{
		682	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		683	{
		684	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		685	SV **bot, **top;
		686	AV *av = newAV (); /* return values */
		687	SV **cb;
		688	dSP;
		689
		690	GV *gv = CvGV (cx->blk_sub.cv);
		691	SV *fullname = sv_2mortal (newSV (0));
		692	if (isGV (gv))
		693	gv_efullname3 (fullname, gv, 0);
		694
		695	bot = PL_stack_base + cx->blk_oldsp + 1;
		696	top = cx->blk_gimme == G_ARRAY ? SP + 1
		697	: cx->blk_gimme == G_SCALAR ? bot + 1
		698	: bot;
		699
		700	while (bot < top)
		701	av_push (av, SvREFCNT_inc (*bot++));
		702
		703	PL_runops = RUNOPS_DEFAULT;
		704	ENTER;
		705	SAVETMPS;
		706	EXTEND (SP, 3);
		707	PUSHMARK (SP);
		708	PUSHs (&PL_sv_no);
		709	PUSHs (fullname);
		710	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		711	PUTBACK;
		712	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		713	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		714	SPAGAIN;
		715	FREETMPS;
		716	LEAVE;
		717	PL_runops = runops_trace;
		718	}
		719
		720	if (oldcop != PL_curcop)
		721	{
		722	oldcop = PL_curcop;
		723
		724	if (PL_curcop != &PL_compiling)
		725	{
		726	SV **cb;
		727
		728	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		729	{
		730	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		731
		732	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		733	{
		734	runops_proc_t old_runops = PL_runops;
		735	dSP;
		736	GV *gv = CvGV (cx->blk_sub.cv);
		737	SV *fullname = sv_2mortal (newSV (0));
		738
		739	if (isGV (gv))
		740	gv_efullname3 (fullname, gv, 0);
		741
		742	PL_runops = RUNOPS_DEFAULT;
		743	ENTER;
		744	SAVETMPS;
		745	EXTEND (SP, 3);
		746	PUSHMARK (SP);
		747	PUSHs (&PL_sv_yes);
		748	PUSHs (fullname);
		749	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		750	PUTBACK;
		751	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		752	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		753	SPAGAIN;
		754	FREETMPS;
		755	LEAVE;
		756	PL_runops = runops_trace;
		757	}
		758
		759	oldcxix = cxstack_ix;
		760	}
		761
		762	if (cctx->flags & CC_TRACE_LINE)
		763	{
		764	dSP;
		765
		766	PL_runops = RUNOPS_DEFAULT;
		767	ENTER;
		768	SAVETMPS;
		769	EXTEND (SP, 3);
		770	PL_runops = RUNOPS_DEFAULT;
		771	PUSHMARK (SP);
		772	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		773	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		774	PUTBACK;
		775	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		776	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		777	SPAGAIN;
		778	FREETMPS;
		779	LEAVE;
		780	PL_runops = runops_trace;
		781	}
		782	}
		783	}
		784	}
		785	}
		786
		787	TAINT_NOT;
		788	return 0;
		789	}
		790
		791	/* inject a fake call to Coro::State::_cctx_init into the execution */
		792	/* _cctx_init should be careful, as it could be called at almost any time */
		793	/* during execution of a perl program */
534	static void NOINLINE	794	static void NOINLINE
535	prepare_cctx (coro_cctx *cctx)	795	prepare_cctx (pTHX_ coro_cctx *cctx)
536	{	796	{
537	dSP;	797	dSP;
538	LOGOP myop;	798	LOGOP myop;
539		799
		800	PL_top_env = &PL_start_env;
		801
		802	if (cctx->flags & CC_TRACE)
		803	PL_runops = runops_trace;
		804
540	Zero (&myop, 1, LOGOP);	805	Zero (&myop, 1, LOGOP);
541	myop.op_next = PL_op;	806	myop.op_next = PL_op;
542	myop.op_flags = OPf_WANT_VOID;	807	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
543
544	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
545		808
546	PUSHMARK (SP);	809	PUSHMARK (SP);
		810	EXTEND (SP, 2);
		811	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
547	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	812	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
548	PUTBACK;	813	PUTBACK;
		814	PL_op = (OP *)&myop;
549	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	815	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
550	SPAGAIN;	816	SPAGAIN;
551	}	817	}
552		818
		819	/*
		820	* this is a _very_ stripped down perl interpreter ;)
		821	*/
553	static void	822	static void
554	coro_run (void *arg)	823	coro_run (void *arg)
555	{	824	{
		825	dTHX;
		826
556	/* coro_run is the alternative epilogue of transfer() */	827	/* coro_run is the alternative tail of transfer(), so unlock here. */
557	UNLOCK;	828	UNLOCK;
558		829
		830	/* we now skip the entersub that lead to transfer() */
		831	PL_op = PL_op->op_next;
		832
		833	/* inject a fake subroutine call to cctx_init */
		834	prepare_cctx (aTHX_ (coro_cctx *)arg);
		835
		836	/* somebody or something will hit me for both perl_run and PL_restartop */
		837	PL_restartop = PL_op;
		838	perl_run (PL_curinterp);
		839
559	/*	840	/*
560	* this is a _very_ stripped down perl interpreter ;)	841	* If perl-run returns we assume exit() was being called or the coro
		842	* fell off the end, which seems to be the only valid (non-bug)
		843	* reason for perl_run to return. We try to exit by jumping to the
		844	* bootstrap-time "top" top_env, as we cannot restore the "main"
		845	* coroutine as Coro has no such concept
561	*/	846	*/
562	PL_top_env = &PL_start_env;	847	PL_top_env = main_top_env;
563		848	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
564	/* inject call to cctx_init */
565	prepare_cctx ((coro_cctx *)arg);
566
567	/* somebody will hit me for both perl_run and PL_restartop */
568	perl_run (PL_curinterp);
569
570	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
571	abort ();
572	}	849	}
573		850
574	static coro_cctx *	851	static coro_cctx *
575	cctx_new ()	852	cctx_new ()
576	{	853	{
577	coro_cctx *cctx;	854	coro_cctx *cctx;
		855	void *stack_start;
		856	size_t stack_size;
578		857
579	++cctx_count;	858	++cctx_count;
580		859
581	New (0, cctx, 1, coro_cctx);	860	Newz (0, cctx, 1, coro_cctx);
582		861
583	#if HAVE_MMAP	862	#if HAVE_MMAP
584		863
585	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	864	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
586	/* mmap suppsedly does allocate-on-write for us */	865	/* mmap supposedly does allocate-on-write for us */
587	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	866	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588		867
589	if (cctx->sptr == (void *)-1)	868	if (cctx->sptr != (void *)-1)
590	{
591	perror ("FATAL: unable to mmap stack for coroutine");
592	_exit (EXIT_FAILURE);
593	}	869	{
594
595	# if STACKGUARD	870	# if CORO_STACKGUARD
596	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	871	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
597	# endif	872	# endif
		873	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		874	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		875	cctx->flags |= CC_MAPPED;
		876	}
		877	else
		878	#endif
		879	{
		880	cctx->ssize = coro_stacksize * (long)sizeof (long);
		881	New (0, cctx->sptr, coro_stacksize, long);
598		882
599	#else
600
601	cctx->ssize = STACKSIZE * (long)sizeof (long);
602	New (0, cctx->sptr, STACKSIZE, long);
603
604	if (!cctx->sptr)	883	if (!cctx->sptr)
605	{	884	{
606	perror ("FATAL: unable to malloc stack for coroutine");	885	perror ("FATAL: unable to allocate stack for coroutine");
607	_exit (EXIT_FAILURE);	886	_exit (EXIT_FAILURE);
608	}	887	}
609		888
610	#endif	889	stack_start = cctx->sptr;
		890	stack_size = cctx->ssize;
		891	}
611		892
612	#if USE_VALGRIND	893	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
613	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
614	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
615	cctx->ssize + (char *)cctx->sptr
616	);
617	#endif
618
619	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	894	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
620		895
621	return cctx;	896	return cctx;
622	}	897	}
623		898
624	static void	899	static void
…		…
627	if (!cctx)	902	if (!cctx)
628	return;	903	return;
629		904
630	--cctx_count;	905	--cctx_count;
631		906
632	#if USE_VALGRIND	907	#if CORO_USE_VALGRIND
633	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	908	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
634	#endif	909	#endif
635		910
636	#if HAVE_MMAP	911	#if HAVE_MMAP
		912	if (cctx->flags & CC_MAPPED)
637	munmap (cctx->sptr, cctx->ssize);	913	munmap (cctx->sptr, cctx->ssize);
638	#else	914	else
		915	#endif
639	Safefree (cctx->sptr);	916	Safefree (cctx->sptr);
640	#endif
641		917
642	Safefree (cctx);	918	Safefree (cctx);
643	}	919	}
644		920
645	static coro_cctx *	921	static coro_cctx *
646	cctx_get ()	922	cctx_get (pTHX)
647	{	923	{
648	coro_cctx *cctx;
649
650	if (cctx_first)	924	while (cctx_first)
651	{	925	{
652	cctx = cctx_first;	926	coro_cctx *cctx = cctx_first;
653	cctx_first = cctx->next;	927	cctx_first = cctx->next;
654	--cctx_idle;	928	--cctx_idle;
655	}	929
656	else	930	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
657	{	931	return cctx;
658	cctx = cctx_new ();	932
659	PL_op = PL_op->op_next;	933	cctx_destroy (cctx);
660	}	934	}
661		935
662	return cctx;	936	return cctx_new ();
663	}	937	}
664		938
665	static void	939	static void
666	cctx_put (coro_cctx *cctx)	940	cctx_put (coro_cctx *cctx)
667	{	941	{
…		…
670	{	944	{
671	coro_cctx *first = cctx_first;	945	coro_cctx *first = cctx_first;
672	cctx_first = first->next;	946	cctx_first = first->next;
673	--cctx_idle;	947	--cctx_idle;
674		948
675	assert (!first->inuse);
676	cctx_destroy (first);	949	cctx_destroy (first);
677	}	950	}
678		951
679	++cctx_idle;	952	++cctx_idle;
680	cctx->next = cctx_first;	953	cctx->next = cctx_first;
681	cctx_first = cctx;	954	cctx_first = cctx;
682	}	955	}
683		956
684	/* never call directly, always through the coro_state_transfer global variable */	957	/** coroutine switching *****************************************************/
		958
685	static void NOINLINE	959	static void NOINLINE
		960	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		961	{
		962	if (prev != next)
		963	{
		964	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		965	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		966
		967	if (next->flags & CF_RUNNING)
		968	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		969
		970	if (next->flags & CF_DESTROYED)
		971	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		972
		973	if (PL_lex_state != LEX_NOTPARSING)
		974	croak ("Coro::State::transfer called while parsing, but this is not supported");
		975	}
		976	}
		977
		978	/* always use the TRANSFER macro */
		979	static void NOINLINE
686	transfer (struct coro *prev, struct coro *next, int flags)	980	transfer (pTHX_ struct coro *prev, struct coro *next)
687	{	981	{
688	dSTACKLEVEL;	982	dSTACKLEVEL;
689		983
690	/* sometimes transfer is only called to set idle_sp */	984	/* sometimes transfer is only called to set idle_sp */
691	if (flags == TRANSFER_SET_STACKLEVEL)	985	if (!next)
		986	{
692	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	987	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		988	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		989	}
693	else if (prev != next)	990	else if (prev != next)
694	{	991	{
695	coro_cctx *prev__cctx;	992	coro_cctx *prev__cctx;
696		993
697	if (prev->flags & CF_NEW)	994	if (prev->flags & CF_NEW)
698	{	995	{
699	/* create a new empty context */	996	/* create a new empty context */
700	Newz (0, prev->cctx, 1, coro_cctx);	997	Newz (0, prev->cctx, 1, coro_cctx);
701	prev->cctx->inuse = 1;
702	prev->flags &= ~CF_NEW;	998	prev->flags &= ~CF_NEW;
703	prev->flags |= CF_RUNNING;	999	prev->flags |= CF_RUNNING;
704	}	1000	}
705
706	/*TODO: must not croak here */
707	if (!prev->flags & CF_RUNNING)
708	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
709
710	if (next->flags & CF_RUNNING)
711	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
712		1001
713	prev->flags &= ~CF_RUNNING;	1002	prev->flags &= ~CF_RUNNING;
714	next->flags |= CF_RUNNING;	1003	next->flags |= CF_RUNNING;
715		1004
716	LOCK;	1005	LOCK;
…		…
718	if (next->flags & CF_NEW)	1007	if (next->flags & CF_NEW)
719	{	1008	{
720	/* need to start coroutine */	1009	/* need to start coroutine */
721	next->flags &= ~CF_NEW;	1010	next->flags &= ~CF_NEW;
722	/* first get rid of the old state */	1011	/* first get rid of the old state */
723	SAVE (prev, -1);	1012	save_perl (aTHX_ prev);
724	/* setup coroutine call */	1013	/* setup coroutine call */
725	setup_coro (next);	1014	setup_coro (aTHX_ next);
726	/* need a new stack */
727	assert (!next->stack);
728	}	1015	}
729	else	1016	else
730	{	1017	{
731	/* coroutine already started */	1018	/* coroutine already started */
732	SAVE (prev, flags);	1019	save_perl (aTHX_ prev);
733	LOAD (next);	1020	load_perl (aTHX_ next);
734	}	1021	}
735		1022
736	prev__cctx = prev->cctx;	1023	prev__cctx = prev->cctx;
737		1024
738	/* possibly "free" the cctx */	1025	/* possibly "free" the cctx */
739	if (prev__cctx->idle_sp == STACKLEVEL)	1026	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
740	{	1027	{
741	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1028	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
742	assert (PL_top_env == prev__cctx->top_env);	1029	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
743		1030
744	prev->cctx = 0;	1031	prev->cctx = 0;
745		1032
746	cctx_put (prev__cctx);	1033	cctx_put (prev__cctx);
747	prev__cctx->inuse = 0;
748	}	1034	}
749		1035
		1036	++next->usecount;
		1037
750	if (!next->cctx)	1038	if (!next->cctx)
751	{
752	next->cctx = cctx_get ();	1039	next->cctx = cctx_get (aTHX);
753	assert (!next->cctx->inuse);
754	next->cctx->inuse = 1;
755	}
756		1040
757	if (prev__cctx != next->cctx)	1041	if (prev__cctx != next->cctx)
758	{	1042	{
759	prev__cctx->top_env = PL_top_env;	1043	prev__cctx->top_env = PL_top_env;
760	PL_top_env = next->cctx->top_env;	1044	PL_top_env = next->cctx->top_env;
761	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1045	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
762	}	1046	}
763		1047
764	free_coro_mortal ();	1048	free_coro_mortal (aTHX);
765
766	UNLOCK;	1049	UNLOCK;
767	}	1050	}
768	}	1051	}
769		1052
770	struct transfer_args	1053	struct transfer_args
771	{	1054	{
772	struct coro *prev, *next;	1055	struct coro *prev, *next;
773	int flags;
774	};	1056	};
775		1057
776	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1058	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1059	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
777		1060
		1061	/** high level stuff ********************************************************/
		1062
778	static void	1063	static int
779	coro_state_destroy (struct coro *coro)	1064	coro_state_destroy (pTHX_ struct coro *coro)
780	{	1065	{
781	if (coro->refcnt--)	1066	if (coro->flags & CF_DESTROYED)
782	return;	1067	return 0;
		1068
		1069	coro->flags |= CF_DESTROYED;
		1070
		1071	if (coro->flags & CF_READY)
		1072	{
		1073	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1074	/* alternative: look through all ready queues and remove the coro */
		1075	LOCK;
		1076	--coro_nready;
		1077	UNLOCK;
		1078	}
		1079	else
		1080	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
783		1081
784	if (coro->mainstack && coro->mainstack != main_mainstack)	1082	if (coro->mainstack && coro->mainstack != main_mainstack)
785	{	1083	{
786	struct coro temp;	1084	struct coro temp;
787		1085
788	if (coro->flags & CF_RUNNING)	1086	if (coro->flags & CF_RUNNING)
789	croak ("FATAL: tried to destroy currently running coroutine");	1087	croak ("FATAL: tried to destroy currently running coroutine");
790		1088
791	SAVE ((&temp), TRANSFER_SAVE_ALL);	1089	Zero (&temp, 1, struct coro);
792	LOAD (coro);	1090	temp.save = CORO_SAVE_ALL;
793		1091
		1092	save_perl (aTHX_ &temp);
		1093	load_perl (aTHX_ coro);
		1094
794	coro_destroy_stacks ();	1095	coro_destroy_stacks (aTHX);
795		1096
796	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1097	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
797		1098
798	coro->mainstack = 0;	1099	coro->mainstack = 0;
799	}	1100	}
800		1101
801	cctx_destroy (coro->cctx);	1102	cctx_destroy (coro->cctx);
802	SvREFCNT_dec (coro->args);	1103	SvREFCNT_dec (coro->args);
803	Safefree (coro);	1104
		1105	if (coro->next) coro->next->prev = coro->prev;
		1106	if (coro->prev) coro->prev->next = coro->next;
		1107	if (coro == coro_first) coro_first = coro->next;
		1108
		1109	return 1;
804	}	1110	}
805		1111
806	static int	1112	static int
807	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1113	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
808	{	1114	{
809	struct coro *coro = (struct coro *)mg->mg_ptr;	1115	struct coro *coro = (struct coro *)mg->mg_ptr;
810	mg->mg_ptr = 0;	1116	mg->mg_ptr = 0;
811		1117
		1118	coro->hv = 0;
		1119
		1120	if (--coro->refcnt < 0)
		1121	{
812	coro_state_destroy (coro);	1122	coro_state_destroy (aTHX_ coro);
		1123	Safefree (coro);
		1124	}
813		1125
814	return 0;	1126	return 0;
815	}	1127	}
816		1128
817	static int	1129	static int
…		…
824	return 0;	1136	return 0;
825	}	1137	}
826		1138
827	static MGVTBL coro_state_vtbl = {	1139	static MGVTBL coro_state_vtbl = {
828	0, 0, 0, 0,	1140	0, 0, 0, 0,
829	coro_state_clear,	1141	coro_state_free,
830	0,	1142	0,
831	#ifdef MGf_DUP	1143	#ifdef MGf_DUP
832	coro_state_dup,	1144	coro_state_dup,
833	#else	1145	#else
834	# define MGf_DUP 0	1146	# define MGf_DUP 0
835	#endif	1147	#endif
836	};	1148	};
837		1149
838	static struct coro *
839	SvSTATE (SV *coro)
840	{
841	HV *stash;
842	MAGIC *mg;
843
844	if (SvROK (coro))
845	coro = SvRV (coro);
846
847	stash = SvSTASH (coro);
848	if (stash != coro_stash && stash != coro_state_stash)
849	{
850	/* very slow, but rare, check */
851	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
852	croak ("Coro::State object required");
853	}
854
855	mg = SvMAGIC (coro);
856	assert (mg->mg_type == PERL_MAGIC_ext);
857	return (struct coro *)mg->mg_ptr;
858	}
859
860	static void	1150	static void
861	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1151	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
862	{	1152	{
863	ta->prev = SvSTATE (prev);	1153	ta->prev = SvSTATE (prev_sv);
864	ta->next = SvSTATE (next);	1154	ta->next = SvSTATE (next_sv);
865	ta->flags = flags;	1155	TRANSFER_CHECK (*ta);
866	}	1156	}
867		1157
868	static void	1158	static void
869	api_transfer (SV *prev, SV *next, int flags)	1159	api_transfer (SV *prev_sv, SV *next_sv)
870	{	1160	{
		1161	dTHX;
871	struct transfer_args ta;	1162	struct transfer_args ta;
872		1163
873	prepare_transfer (&ta, prev, next, flags);	1164	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
874	TRANSFER (ta);	1165	TRANSFER (ta);
875	}	1166	}
876		1167
		1168	static int
		1169	api_save (SV *coro_sv, int new_save)
		1170	{
		1171	dTHX;
		1172	struct coro *coro = SvSTATE (coro_sv);
		1173	int old_save = coro->save;
		1174
		1175	if (new_save >= 0)
		1176	coro->save = new_save;
		1177
		1178	return old_save;
		1179	}
		1180
877	/** Coro ********************************************************************/	1181	/** Coro ********************************************************************/
878		1182
879	#define PRIO_MAX 3
880	#define PRIO_HIGH 1
881	#define PRIO_NORMAL 0
882	#define PRIO_LOW -1
883	#define PRIO_IDLE -3
884	#define PRIO_MIN -4
885
886	/* for Coro.pm */
887	static SV *coro_current;
888	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
889	static int coro_nready;
890
891	static void	1183	static void
892	coro_enq (SV *coro_sv)	1184	coro_enq (pTHX_ SV *coro_sv)
893	{	1185	{
894	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);
895	coro_nready++;
896	}	1187	}
897		1188
898	static SV *	1189	static SV *
899	coro_deq (int min_prio)	1190	coro_deq (pTHX_ int min_prio)
900	{	1191	{
901	int prio = PRIO_MAX - PRIO_MIN;	1192	int prio = PRIO_MAX - PRIO_MIN;
902		1193
903	min_prio -= PRIO_MIN;	1194	min_prio -= PRIO_MIN;
904	if (min_prio < 0)	1195	if (min_prio < 0)
905	min_prio = 0;	1196	min_prio = 0;
906		1197
907	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1198	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
908	if (AvFILLp (coro_ready [prio]) >= 0)	1199	if (AvFILLp (coro_ready [prio]) >= 0)
909	{
910	coro_nready--;
911	return av_shift (coro_ready [prio]);	1200	return av_shift (coro_ready [prio]);
912	}
913		1201
914	return 0;	1202	return 0;
915	}	1203	}
916		1204
917	static int	1205	static int
918	api_ready (SV *coro_sv)	1206	api_ready (SV *coro_sv)
919	{	1207	{
		1208	dTHX;
920	struct coro *coro;	1209	struct coro *coro;
921		1210
922	if (SvROK (coro_sv))	1211	if (SvROK (coro_sv))
923	coro_sv = SvRV (coro_sv);	1212	coro_sv = SvRV (coro_sv);
924		1213
925	coro = SvSTATE (coro_sv);	1214	coro = SvSTATE (coro_sv);
926		1215
927	if (coro->flags & CF_READY)	1216	if (coro->flags & CF_READY)
928	return 0;	1217	return 0;
929		1218
930	#if 0 /* this is actually harmless */
931	if (coro->flags & CF_RUNNING)
932	croak ("Coro::ready called on currently running coroutine");
933	#endif
934
935	coro->flags |= CF_READY;	1219	coro->flags |= CF_READY;
936		1220
937	LOCK;	1221	LOCK;
938	coro_enq (SvREFCNT_inc (coro_sv));	1222	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1223	++coro_nready;
939	UNLOCK;	1224	UNLOCK;
940		1225
941	return 1;	1226	return 1;
942	}	1227	}
943		1228
944	static int	1229	static int
945	api_is_ready (SV *coro_sv)	1230	api_is_ready (SV *coro_sv)
946	{	1231	{
		1232	dTHX;
947	return !!SvSTATE (coro_sv)->flags & CF_READY;	1233	return !!(SvSTATE (coro_sv)->flags & CF_READY);
948	}	1234	}
949		1235
950	static void	1236	static void
951	prepare_schedule (struct transfer_args *ta)	1237	prepare_schedule (pTHX_ struct transfer_args *ta)
952	{	1238	{
953	SV *prev, *next;	1239	SV *prev_sv, *next_sv;
954		1240
955	for (;;)	1241	for (;;)
956	{	1242	{
957	LOCK;	1243	LOCK;
958	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;
959	UNLOCK;	1276	UNLOCK;
960
961	if (next)
962	break;	1277	break;
963
964	{
965	dSP;
966
967	ENTER;
968	SAVETMPS;
969
970	PUSHMARK (SP);
971	PUTBACK;
972	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
973
974	FREETMPS;
975	LEAVE;
976	}	1278	}
977	}
978
979	prev = SvRV (coro_current);
980	SvRV_set (coro_current, next);
981		1279
982	/* 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
983	LOCK;	1288	LOCK;
984	free_coro_mortal ();	1289	free_coro_mortal (aTHX);
		1290	coro_mortal = prev_sv;
985	UNLOCK;	1291	UNLOCK;
986	coro_mortal = prev;
987
988	assert (!SvROK(prev));//D
989	assert (!SvROK(next));//D
990
991	ta->prev = SvSTATE (prev);
992	ta->next = SvSTATE (next);
993	ta->flags = TRANSFER_SAVE_ALL;
994
995	assert (ta->flags & CF_READY);
996	ta->next->flags &= ~CF_READY;
997	}	1292	}
998		1293
999	static void	1294	static void
1000	prepare_cede (struct transfer_args *ta)	1295	prepare_cede (pTHX_ struct transfer_args *ta)
1001	{	1296	{
1002	api_ready (coro_current);	1297	api_ready (coro_current);
1003
1004	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;
1005	}	1313	}
1006		1314
1007	static void	1315	static void
1008	api_schedule (void)	1316	api_schedule (void)
1009	{	1317	{
		1318	dTHX;
1010	struct transfer_args ta;	1319	struct transfer_args ta;
1011		1320
1012	prepare_schedule (&ta);	1321	prepare_schedule (aTHX_ &ta);
1013	TRANSFER (ta);	1322	TRANSFER (ta);
1014	}	1323	}
1015		1324
		1325	static int
		1326	api_cede (void)
		1327	{
		1328	dTHX;
		1329	struct transfer_args ta;
		1330
		1331	prepare_cede (aTHX_ &ta);
		1332
		1333	if (ta.prev != ta.next)
		1334	{
		1335	TRANSFER (ta);
		1336	return 1;
		1337	}
		1338	else
		1339	return 0;
		1340	}
		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
1016	static void	1357	static void
1017	api_cede (void)	1358	api_trace (SV *coro_sv, int flags)
1018	{	1359	{
1019	struct transfer_args ta;	1360	dTHX;
		1361	struct coro *coro = SvSTATE (coro_sv);
1020		1362
1021	prepare_cede (&ta);	1363	if (flags & CC_TRACE)
1022	TRANSFER (ta);	1364	{
1023	}	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");
1024		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
1025	MODULE = Coro::State PACKAGE = Coro::State	1383	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1026		1384
1027	PROTOTYPES: DISABLE	1385	PROTOTYPES: DISABLE
1028		1386
1029	BOOT:	1387	BOOT:
1030	{	1388	{
…		…
1033	#endif	1391	#endif
1034	BOOT_PAGESIZE;	1392	BOOT_PAGESIZE;
1035		1393
1036	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1394	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1037		1395
		1396	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1397	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
		1398	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1399	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
		1400
1038	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1401	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1039	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1402	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1040	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1403	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1404	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1405	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1406	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1407	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1041		1408
1042	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;
1043		1414
1044	coroapi.ver = CORO_API_VERSION;	1415	coroapi.ver = CORO_API_VERSION;
1045	coroapi.transfer = api_transfer;	1416	coroapi.transfer = api_transfer;
1046		1417
1047	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1418	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1055	HV *hv;	1426	HV *hv;
1056	int i;	1427	int i;
1057		1428
1058	Newz (0, coro, 1, struct coro);	1429	Newz (0, coro, 1, struct coro);
1059	coro->args = newAV ();	1430	coro->args = newAV ();
		1431	coro->save = CORO_SAVE_DEF;
1060	coro->flags = CF_NEW;	1432	coro->flags = CF_NEW;
1061		1433
		1434	if (coro_first) coro_first->prev = coro;
		1435	coro->next = coro_first;
		1436	coro_first = coro;
		1437
1062	hv = newHV ();	1438	coro->hv = hv = newHV ();
1063	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1439	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1064	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1440	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1065		1441
1066	for (i = 1; i < items; i++)	1442	for (i = 1; i < items; i++)
1067	av_push (coro->args, newSVsv (ST (i)));	1443	av_push (coro->args, newSVsv (ST (i)));
1068	}	1444	}
1069	OUTPUT:	1445	OUTPUT:
1070	RETVAL	1446	RETVAL
1071		1447
		1448	int
		1449	save (SV *coro, int new_save = -1)
		1450	CODE:
		1451	RETVAL = api_save (coro, new_save);
		1452	OUTPUT:
		1453	RETVAL
		1454
		1455	int
		1456	save_also (SV *coro_sv, int save_also)
		1457	CODE:
		1458	{
		1459	struct coro *coro = SvSTATE (coro_sv);
		1460	RETVAL = coro->save;
		1461	coro->save |= save_also;
		1462	}
		1463	OUTPUT:
		1464	RETVAL
		1465
		1466	# these not obviously related functions are all rolled into the same xs
		1467	# function to increase chances that they all will call transfer with the same
		1468	# stack offset
1072	void	1469	void
1073	_set_stacklevel (...)	1470	_set_stacklevel (...)
1074	ALIAS:	1471	ALIAS:
1075	Coro::State::transfer = 1	1472	Coro::State::transfer = 1
1076	Coro::schedule = 2	1473	Coro::schedule = 2
1077	Coro::cede = 3	1474	Coro::cede = 3
		1475	Coro::cede_notself = 4
1078	CODE:	1476	CODE:
1079	{	1477	{
1080	struct transfer_args ta;	1478	struct transfer_args ta;
1081		1479
1082	switch (ix)	1480	switch (ix)
1083	{	1481	{
1084	case 0:	1482	case 0:
1085	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1483	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1086	ta.next = 0;	1484	ta.next = 0;
1087	ta.flags = TRANSFER_SET_STACKLEVEL;
1088	break;	1485	break;
1089		1486
1090	case 1:	1487	case 1:
1091	if (items != 3)	1488	if (items != 2)
1092	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);	1489	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1093		1490
1094	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1491	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1095	break;	1492	break;
1096		1493
1097	case 2:	1494	case 2:
1098	prepare_schedule (&ta);	1495	prepare_schedule (aTHX_ &ta);
1099	break;	1496	break;
1100		1497
1101	case 3:	1498	case 3:
1102	prepare_cede (&ta);	1499	prepare_cede (aTHX_ &ta);
		1500	break;
		1501
		1502	case 4:
		1503	if (!prepare_cede_notself (aTHX_ &ta))
		1504	XSRETURN_EMPTY;
		1505
1103	break;	1506	break;
1104	}	1507	}
1105		1508
		1509	BARRIER;
1106	TRANSFER (ta);	1510	TRANSFER (ta);
1107	}
1108		1511
1109	void	1512	if (GIMME_V != G_VOID && ta.next != ta.prev)
1110	_clone_state_from (SV *dst, SV *src)	1513	XSRETURN_YES;
		1514	}
		1515
		1516	bool
		1517	_destroy (SV *coro_sv)
1111	CODE:	1518	CODE:
1112	{	1519	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1113	struct coro *coro_src = SvSTATE (src);	1520	OUTPUT:
1114		1521	RETVAL
1115	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1116
1117	++coro_src->refcnt;
1118	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1119	}
1120		1522
1121	void	1523	void
1122	_exit (code)	1524	_exit (code)
1123	int code	1525	int code
1124	PROTOTYPE: $	1526	PROTOTYPE: $
1125	CODE:	1527	CODE:
1126	_exit (code);	1528	_exit (code);
1127		1529
1128	int	1530	int
		1531	cctx_stacksize (int new_stacksize = 0)
		1532	CODE:
		1533	RETVAL = coro_stacksize;
		1534	if (new_stacksize)
		1535	coro_stacksize = new_stacksize;
		1536	OUTPUT:
		1537	RETVAL
		1538
		1539	int
1129	cctx_count ()	1540	cctx_count ()
1130	CODE:	1541	CODE:
1131	RETVAL = cctx_count;	1542	RETVAL = cctx_count;
1132	OUTPUT:	1543	OUTPUT:
1133	RETVAL	1544	RETVAL
…		…
1137	CODE:	1548	CODE:
1138	RETVAL = cctx_idle;	1549	RETVAL = cctx_idle;
1139	OUTPUT:	1550	OUTPUT:
1140	RETVAL	1551	RETVAL
1141		1552
		1553	void
		1554	list ()
		1555	PPCODE:
		1556	{
		1557	struct coro *coro;
		1558	for (coro = coro_first; coro; coro = coro->next)
		1559	if (coro->hv)
		1560	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1561	}
		1562
		1563	void
		1564	call (Coro::State coro, SV *coderef)
		1565	ALIAS:
		1566	eval = 1
		1567	CODE:
		1568	{
		1569	if (coro->mainstack)
		1570	{
		1571	struct coro temp;
		1572	Zero (&temp, 1, struct coro);
		1573	temp.save = CORO_SAVE_ALL;
		1574
		1575	if (!(coro->flags & CF_RUNNING))
		1576	{
		1577	save_perl (aTHX_ &temp);
		1578	load_perl (aTHX_ coro);
		1579	}
		1580
		1581	{
		1582	dSP;
		1583	ENTER;
		1584	SAVETMPS;
		1585	PUSHMARK (SP);
		1586	PUTBACK;
		1587	if (ix)
		1588	eval_sv (coderef, 0);
		1589	else
		1590	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1591	SPAGAIN;
		1592	FREETMPS;
		1593	LEAVE;
		1594	PUTBACK;
		1595	}
		1596
		1597	if (!(coro->flags & CF_RUNNING))
		1598	{
		1599	save_perl (aTHX_ coro);
		1600	load_perl (aTHX_ &temp);
		1601	}
		1602	}
		1603	}
		1604
		1605	SV *
		1606	is_ready (Coro::State coro)
		1607	PROTOTYPE: $
		1608	ALIAS:
		1609	is_ready = CF_READY
		1610	is_running = CF_RUNNING
		1611	is_new = CF_NEW
		1612	is_destroyed = CF_DESTROYED
		1613	CODE:
		1614	RETVAL = boolSV (coro->flags & ix);
		1615	OUTPUT:
		1616	RETVAL
		1617
		1618	void
		1619	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1620
		1621	SV *
		1622	has_stack (Coro::State coro)
		1623	PROTOTYPE: $
		1624	CODE:
		1625	RETVAL = boolSV (!!coro->cctx);
		1626	OUTPUT:
		1627	RETVAL
		1628
		1629	int
		1630	is_traced (Coro::State coro)
		1631	PROTOTYPE: $
		1632	CODE:
		1633	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1634	OUTPUT:
		1635	RETVAL
		1636
		1637	IV
		1638	rss (Coro::State coro)
		1639	PROTOTYPE: $
		1640	ALIAS:
		1641	usecount = 1
		1642	CODE:
		1643	switch (ix)
		1644	{
		1645	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1646	case 1: RETVAL = coro->usecount; break;
		1647	}
		1648	OUTPUT:
		1649	RETVAL
		1650
		1651
1142	MODULE = Coro::State PACKAGE = Coro	1652	MODULE = Coro::State PACKAGE = Coro
1143		1653
1144	BOOT:	1654	BOOT:
1145	{	1655	{
1146	int i;	1656	int i;
		1657
		1658	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1659	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1660	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1661
		1662	coro_current = get_sv ("Coro::current", FALSE);
		1663	SvREADONLY_on (coro_current);
1147		1664
1148	coro_stash = gv_stashpv ("Coro", TRUE);	1665	coro_stash = gv_stashpv ("Coro", TRUE);
1149		1666
1150	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1667	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1151	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1668	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1152	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1669	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1153	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1670	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1154	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1671	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1155	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1672	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1156		1673
1157	coro_current = get_sv ("Coro::current", FALSE);
1158	SvREADONLY_on (coro_current);
1159
1160	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1674	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1161	coro_ready[i] = newAV ();	1675	coro_ready[i] = newAV ();
1162		1676
1163	{	1677	{
1164	SV *sv = perl_get_sv("Coro::API", 1);	1678	SV *sv = perl_get_sv("Coro::API", 1);
1165		1679
1166	coroapi.schedule = api_schedule;	1680	coroapi.schedule = api_schedule;
		1681	coroapi.save = api_save;
1167	coroapi.cede = api_cede;	1682	coroapi.cede = api_cede;
		1683	coroapi.cede_notself = api_cede_notself;
1168	coroapi.ready = api_ready;	1684	coroapi.ready = api_ready;
1169	coroapi.is_ready = api_is_ready;	1685	coroapi.is_ready = api_is_ready;
1170	coroapi.nready = &coro_nready;	1686	coroapi.nready = &coro_nready;
1171	coroapi.current = coro_current;	1687	coroapi.current = coro_current;
1172		1688
1173	GCoroAPI = &coroapi;	1689	GCoroAPI = &coroapi;
1174	sv_setiv (sv, (IV)&coroapi);	1690	sv_setiv (sv, (IV)&coroapi);
1175	SvREADONLY_on (sv);	1691	SvREADONLY_on (sv);
1176	}	1692	}
1177	}	1693	}
		1694
		1695	void
		1696	_set_current (SV *current)
		1697	PROTOTYPE: $
		1698	CODE:
		1699	SvREFCNT_dec (SvRV (coro_current));
		1700	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1178		1701
1179	int	1702	int
1180	prio (Coro::State coro, int newprio = 0)	1703	prio (Coro::State coro, int newprio = 0)
1181	ALIAS:	1704	ALIAS:
1182	nice = 1	1705	nice = 1
…		…
1185	RETVAL = coro->prio;	1708	RETVAL = coro->prio;
1186		1709
1187	if (items > 1)	1710	if (items > 1)
1188	{	1711	{
1189	if (ix)	1712	if (ix)
1190	newprio += coro->prio;	1713	newprio = coro->prio - newprio;
1191		1714
1192	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1715	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1193	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1716	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1194		1717
1195	coro->prio = newprio;	1718	coro->prio = newprio;
1196	}	1719	}
1197	}	1720	}
		1721	OUTPUT:
		1722	RETVAL
1198		1723
1199	SV *	1724	SV *
1200	ready (SV *self)	1725	ready (SV *self)
1201	PROTOTYPE: $	1726	PROTOTYPE: $
1202	CODE:	1727	CODE:
1203	RETVAL = boolSV (api_ready (self));	1728	RETVAL = boolSV (api_ready (self));
1204	OUTPUT:	1729	OUTPUT:
1205	RETVAL	1730	RETVAL
1206		1731
1207	SV *
1208	is_ready (SV *self)
1209	PROTOTYPE: $
1210	CODE:
1211	RETVAL = boolSV (api_is_ready (self));
1212	OUTPUT:
1213	RETVAL
1214
1215	int	1732	int
1216	nready (...)	1733	nready (...)
1217	PROTOTYPE:	1734	PROTOTYPE:
1218	CODE:	1735	CODE:
1219	RETVAL = coro_nready;	1736	RETVAL = coro_nready;
1220	OUTPUT:	1737	OUTPUT:
1221	RETVAL	1738	RETVAL
1222		1739
		1740	# for async_pool speedup
1223	void	1741	void
1224	_set_current (SV *current)	1742	_pool_1 (SV *cb)
1225	PROTOTYPE: $
1226	CODE:	1743	CODE:
1227	SvREFCNT_dec (SvRV (coro_current));	1744	{
1228	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));	1745	int i, len;
		1746	HV *hv = (HV *)SvRV (coro_current);
		1747	AV *defav = GvAV (PL_defgv);
		1748	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1749	AV *invoke_av;
		1750
		1751	if (!invoke)
		1752	croak ("\3terminate\2\n");
		1753
		1754	hv_store (hv, "desc", sizeof ("desc") - 1,
		1755	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1756
		1757	invoke_av = (AV *)SvRV (invoke);
		1758	len = av_len (invoke_av);
		1759
		1760	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1761
		1762	if (len > 0)
		1763	{
		1764	av_fill (defav, len - 1);
		1765	for (i = 0; i < len; ++i)
		1766	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1767	}
		1768
		1769	SvREFCNT_dec (invoke);
		1770	}
		1771
		1772	void
		1773	_pool_2 (SV *cb)
		1774	CODE:
		1775	{
		1776	struct coro *coro = SvSTATE (coro_current);
		1777
		1778	sv_setsv (cb, &PL_sv_undef);
		1779
		1780	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1781	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1782	croak ("\3terminate\2\n");
		1783
		1784	av_clear (GvAV (PL_defgv));
		1785	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1786	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1787
		1788	coro->save = CORO_SAVE_DEF;
		1789	coro->prio = 0;
		1790
		1791	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1792	api_trace (coro_current, 0);
		1793
		1794	av_push (av_async_pool, newSVsv (coro_current));
		1795	}
		1796
1229		1797
1230	MODULE = Coro::State PACKAGE = Coro::AIO	1798	MODULE = Coro::State PACKAGE = Coro::AIO
1231		1799
1232	SV *	1800	SV *
1233	_get_state ()	1801	_get_state ()
1234	CODE:	1802	CODE:
1235	{	1803	{
1236	struct {	1804	struct io_state *data;
1237	int errorno;
1238	int laststype;
1239	int laststatval;
1240	Stat_t statcache;
1241	} data;
1242		1805
		1806	RETVAL = newSV (sizeof (struct io_state));
		1807	data = (struct io_state *)SvPVX (RETVAL);
		1808	SvCUR_set (RETVAL, sizeof (struct io_state));
		1809	SvPOK_only (RETVAL);
		1810
1243	data.errorno = errno;	1811	data->errorno = errno;
1244	data.laststype = PL_laststype;	1812	data->laststype = PL_laststype;
1245	data.laststatval = PL_laststatval;	1813	data->laststatval = PL_laststatval;
1246	data.statcache = PL_statcache;	1814	data->statcache = PL_statcache;
1247
1248	RETVAL = newSVpvn ((char *)&data, sizeof data);
1249	}	1815	}
1250	OUTPUT:	1816	OUTPUT:
1251	RETVAL	1817	RETVAL
1252		1818
1253	void	1819	void
1254	_set_state (char *data_)	1820	_set_state (char *data_)
1255	PROTOTYPE: $	1821	PROTOTYPE: $
1256	CODE:	1822	CODE:
1257	{	1823	{
1258	struct {	1824	struct io_state *data = (void *)data_;
1259	int errorno;
1260	int laststype;
1261	int laststatval;
1262	Stat_t statcache;
1263	} *data = (void *)data_;
1264		1825
1265	errno = data->errorno;	1826	errno = data->errorno;
1266	PL_laststype = data->laststype;	1827	PL_laststype = data->laststype;
1267	PL_laststatval = data->laststatval;	1828	PL_laststatval = data->laststatval;
1268	PL_statcache = data->statcache;	1829	PL_statcache = data->statcache;
1269	}	1830	}
		1831

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