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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.93 by root, Sun Nov 26 03:22:50 2006 UTC vs.
Revision 1.126 by root, Tue Dec 12 04:19:56 2006 UTC

1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	#if PERL_VERSION < 6	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)
12	# ifndef PL_ppaddr	23	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	24	# define PL_ppaddr ppaddr
14	# endif	25	# endif
15	# ifndef call_sv	26	# ifndef call_sv
16	# define call_sv perl_call_sv	27	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	38	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	39	# define IS_PADCONST(v) 0
29	# endif	40	# endif
30	#endif	41	#endif
31		42
		43	/* 5.8.7 */
		44	#ifndef SvRV_set
		45	# define SvRV_set(s,v) SvRV(s) = (v)
		46	#endif
		47
32	#include <stdio.h>	48	#include <stdio.h>
33	#include <errno.h>	49	#include <errno.h>
		50	#include <assert.h>
34		51
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	52	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	53	# undef STACKGUARD
37	#endif	54	#endif
38		55
…		…
54	# ifndef PAGESIZE	71	# ifndef PAGESIZE
55	# define PAGESIZE pagesize	72	# define PAGESIZE pagesize
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)	73	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;	74	static long pagesize;
58	# else	75	# else
59	# define BOOT_PAGESIZE	76	# define BOOT_PAGESIZE (void)0
60	# endif	77	# endif
		78	#else
		79	# define PAGESIZE 0
		80	# define BOOT_PAGESIZE (void)0
61	#endif	81	#endif
62		82
63	/* The next macro should declare a variable stacklevel that contains and approximation	83	/* The next macro should declare a variable stacklevel that contains and approximation
64	* to the current C stack pointer. Its property is that it changes with each call	84	* to the current C stack pointer. Its property is that it changes with each call
65	* and should be unique. */	85	* and should be unique. */
66	#define dSTACKLEVEL int stacklevel	86	#define dSTACKLEVEL int stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	87	#define STACKLEVEL ((void *)&stacklevel)
68		88
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	89	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		90
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	91	#if __GNUC__ >= 3
		92	# define attribute(x) __attribute__(x)
		93	#else
		94	# define attribute(x)
		95	#endif
		96
		97	#define NOINLINE attribute ((noinline))
72		98
73	#include "CoroAPI.h"	99	#include "CoroAPI.h"
74
75	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
76		100
77	#ifdef USE_ITHREADS	101	#ifdef USE_ITHREADS
78	static perl_mutex coro_mutex;	102	static perl_mutex coro_mutex;
79	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	103	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
80	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	104	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
81	#else	105	#else
82	# define LOCK (void)0	106	# define LOCK (void)0
83	# define UNLOCK (void)0	107	# define UNLOCK (void)0
84	#endif	108	#endif
85		109
		110	struct io_state
		111	{
		112	int errorno;
		113	I32 laststype;
		114	int laststatval;
		115	Stat_t statcache;
		116	};
		117
86	static struct CoroAPI coroapi;	118	static struct CoroAPI coroapi;
87	static AV *main_mainstack; /* used to differentiate between $main and others */	119	static AV *main_mainstack; /* used to differentiate between $main and others */
88	static HV *coro_state_stash, *coro_stash;	120	static HV *coro_state_stash, *coro_stash;
89	static SV *coro_mortal; /* will be freed after next transfer */	121	static SV *coro_mortal; /* will be freed after next transfer */
90		122
		123	static struct coro_cctx *cctx_first;
		124	static int cctx_count, cctx_idle;
		125
91	/* this is a structure representing a c-level coroutine */	126	/* this is a structure representing a c-level coroutine */
92	typedef struct coro_stack {	127	typedef struct coro_cctx {
93	struct coro_stack *next;	128	struct coro_cctx *next;
94		129
95	/* the stack */	130	/* the stack */
96	void *sptr;	131	void *sptr;
97	long ssize; /* positive == mmap, otherwise malloc */	132	long ssize; /* positive == mmap, otherwise malloc */
98		133
99	/* cpu state */	134	/* cpu state */
100	void *idle_sp; /* original stacklevel when coroutine was created */	135	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
101	JMPENV *top_env;	136	JMPENV *top_env;
102	coro_context cctx;	137	coro_context cctx;
103	} coro_stack;
104		138
105	/* the (fake) coro_stack representing the main program */	139	int inuse;
106	static coro_stack *main_stack;	140
		141	#if USE_VALGRIND
		142	int valgrind_id;
		143	#endif
		144	} coro_cctx;
		145
		146	enum {
		147	CF_RUNNING = 0x0001, /* coroutine is running */
		148	CF_READY = 0x0002, /* coroutine is ready */
		149	CF_NEW = 0x0004, /* ahs never been switched to */
		150	};
107		151
108	/* this is a structure representing a perl-level coroutine */	152	/* this is a structure representing a perl-level coroutine */
109	struct coro {	153	struct coro {
110	/* the c coroutine allocated to this perl coroutine, if any */	154	/* the c coroutine allocated to this perl coroutine, if any */
111	coro_stack *stack;	155	coro_cctx *cctx;
112		156
113	/* data associated with this coroutine (initial args) */	157	/* data associated with this coroutine (initial args) */
114	AV *args;	158	AV *args;
115	int refcnt;	159	int refcnt;
		160	int save; /* CORO_SAVE flags */
		161	int flags; /* CF_ flags */
116		162
117	/* optionally saved, might be zero */	163	/* optionally saved, might be zero */
118	AV *defav;	164	AV *defav; /* @_ */
119	SV *defsv;	165	SV *defsv; /* $_ */
120	SV *errsv;	166	SV *errsv; /* $@ */
		167	SV *irssv; /* $/ */
		168	SV *irssv_sv; /* real $/ cache */
121		169
122	/* saved global state not related to stacks */	170	#define VAR(name,type) type name;
123	U8 dowarn;	171	# include "state.h"
124	I32 in_eval;	172	#undef VAR
125
126	/* the stacks and related info (callchain etc..) */
127	PERL_SI *curstackinfo;
128	AV *curstack;
129	AV *mainstack;
130	SV **stack_sp;
131	OP *op;
132	SV **curpad;
133	AV *comppad;
134	CV *compcv;
135	SV **stack_base;
136	SV **stack_max;
137	SV **tmps_stack;
138	I32 tmps_floor;
139	I32 tmps_ix;
140	I32 tmps_max;
141	I32 *markstack;
142	I32 *markstack_ptr;
143	I32 *markstack_max;
144	I32 *scopestack;
145	I32 scopestack_ix;
146	I32 scopestack_max;
147	ANY *savestack;
148	I32 savestack_ix;
149	I32 savestack_max;
150	OP **retstack;
151	I32 retstack_ix;
152	I32 retstack_max;
153	PMOP *curpm;
154	COP *curcop;
155		173
156	/* coro process data */	174	/* coro process data */
157	int prio;	175	int prio;
158	};	176	};
159		177
160	typedef struct coro *Coro__State;	178	typedef struct coro *Coro__State;
161	typedef struct coro *Coro__State_or_hashref;	179	typedef struct coro *Coro__State_or_hashref;
162		180
163	static AV *	181	static AV *
164	coro_clone_padlist (pTHX_ CV *cv)	182	coro_clone_padlist (CV *cv)
165	{	183	{
166	AV *padlist = CvPADLIST (cv);	184	AV *padlist = CvPADLIST (cv);
167	AV *newpadlist, *newpad;	185	AV *newpadlist, *newpad;
168		186
169	newpadlist = newAV ();	187	newpadlist = newAV ();
170	AvREAL_off (newpadlist);	188	AvREAL_off (newpadlist);
171	#if PERL_VERSION < 9	189	#if PERL_VERSION_ATLEAST (5,9,0)
		190	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		191	#else
172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	192	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
173	#else
174	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
175	#endif	193	#endif
176	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	194	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
177	--AvFILLp (padlist);	195	--AvFILLp (padlist);
178		196
179	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	197	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
181		199
182	return newpadlist;	200	return newpadlist;
183	}	201	}
184		202
185	static void	203	static void
186	free_padlist (pTHX_ AV *padlist)	204	free_padlist (AV *padlist)
187	{	205	{
188	/* may be during global destruction */	206	/* may be during global destruction */
189	if (SvREFCNT (padlist))	207	if (SvREFCNT (padlist))
190	{	208	{
191	I32 i = AvFILLp (padlist);	209	I32 i = AvFILLp (padlist);
…		…
212	AV *padlist;	230	AV *padlist;
213	AV *av = (AV *)mg->mg_obj;	231	AV *av = (AV *)mg->mg_obj;
214		232
215	/* casting is fun. */	233	/* casting is fun. */
216	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	234	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
217	free_padlist (aTHX_ padlist);	235	free_padlist (padlist);
218		236
219	SvREFCNT_dec (av);	237	SvREFCNT_dec (av);
220		238
221	return 0;	239	return 0;
222	}	240	}
223		241
224	#define PERL_MAGIC_coro PERL_MAGIC_ext	242	#define PERL_MAGIC_coro PERL_MAGIC_ext
225		243
226	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	244	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
227		245
		246	#define CORO_MAGIC(cv) \
		247	SvMAGIC (cv) \
		248	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		249	? SvMAGIC (cv) \
		250	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		251	: 0
		252
228	/* the next two functions merely cache the padlists */	253	/* the next two functions merely cache the padlists */
229	static void	254	static void
230	get_padlist (pTHX_ CV *cv)	255	get_padlist (CV *cv)
231	{	256	{
232	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	257	MAGIC *mg = CORO_MAGIC (cv);
		258	AV *av;
233		259
234	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	260	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
235	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	261	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
236	else	262	else
237	{	263	{
238	#if 0	264	#if 0
239	/* this should work - but it doesn't :( */	265	/* this is probably cleaner, but also slower? */
240	CV *cp = Perl_cv_clone (aTHX_ cv);	266	CV *cp = Perl_cv_clone (cv);
241	CvPADLIST (cv) = CvPADLIST (cp);	267	CvPADLIST (cv) = CvPADLIST (cp);
242	CvPADLIST (cp) = 0;	268	CvPADLIST (cp) = 0;
243	SvREFCNT_dec (cp);	269	SvREFCNT_dec (cp);
244	#else	270	#else
245	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	271	CvPADLIST (cv) = coro_clone_padlist (cv);
246	#endif	272	#endif
247	}	273	}
248	}	274	}
249		275
250	static void	276	static void
251	put_padlist (pTHX_ CV *cv)	277	put_padlist (CV *cv)
252	{	278	{
253	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	279	MAGIC *mg = CORO_MAGIC (cv);
		280	AV *av;
254		281
255	if (!mg)	282	if (!mg)
256	{	283	{
257	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	284	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
258	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	285	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
259	mg->mg_virtual = &vtbl_coro;	286	mg->mg_virtual = &vtbl_coro;
260	mg->mg_obj = (SV *)newAV ();	287	mg->mg_obj = (SV *)newAV ();
261	}	288	}
262		289
263	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	290	av = (AV *)mg->mg_obj;
		291
		292	if (AvFILLp (av) >= AvMAX (av))
		293	av_extend (av, AvMAX (av) + 1);
		294
		295	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
264	}	296	}
265		297
266	#define SB do {	298	#define SB do {
267	#define SE } while (0)	299	#define SE } while (0)
268		300
269	#define LOAD(state) load_state(aTHX_ (state));
270	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
271
272	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	301	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
273		302
274	static void	303	static void
275	load_state(pTHX_ Coro__State c)	304	load_perl (Coro__State c)
276	{	305	{
277	PL_dowarn = c->dowarn;	306	#define VAR(name,type) PL_ ## name = c->name;
278	PL_in_eval = c->in_eval;	307	# include "state.h"
279		308	#undef VAR
280	PL_curstackinfo = c->curstackinfo;
281	PL_curstack = c->curstack;
282	PL_mainstack = c->mainstack;
283	PL_stack_sp = c->stack_sp;
284	PL_op = c->op;
285	PL_curpad = c->curpad;
286	PL_comppad = c->comppad;
287	PL_compcv = c->compcv;
288	PL_stack_base = c->stack_base;
289	PL_stack_max = c->stack_max;
290	PL_tmps_stack = c->tmps_stack;
291	PL_tmps_floor = c->tmps_floor;
292	PL_tmps_ix = c->tmps_ix;
293	PL_tmps_max = c->tmps_max;
294	PL_markstack = c->markstack;
295	PL_markstack_ptr = c->markstack_ptr;
296	PL_markstack_max = c->markstack_max;
297	PL_scopestack = c->scopestack;
298	PL_scopestack_ix = c->scopestack_ix;
299	PL_scopestack_max = c->scopestack_max;
300	PL_savestack = c->savestack;
301	PL_savestack_ix = c->savestack_ix;
302	PL_savestack_max = c->savestack_max;
303	#if PERL_VERSION < 9
304	PL_retstack = c->retstack;
305	PL_retstack_ix = c->retstack_ix;
306	PL_retstack_max = c->retstack_max;
307	#endif
308	PL_curpm = c->curpm;
309	PL_curcop = c->curcop;
310		309
311	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	310	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
312	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	311	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
313	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	312	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		313	if (c->irssv)
		314	{
		315	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		316	SvREFCNT_dec (c->irssv);
		317	else
		318	{
		319	REPLACE_SV (PL_rs, c->irssv);
		320	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		321	sv_setsv (c->irssv_sv, PL_rs);
		322	}
		323	}
314		324
315	{	325	{
316	dSP;	326	dSP;
317	CV *cv;	327	CV *cv;
318		328
319	/* now do the ugly restore mess */	329	/* now do the ugly restore mess */
320	while ((cv = (CV *)POPs))	330	while ((cv = (CV *)POPs))
321	{	331	{
322	AV *padlist = (AV *)POPs;
323
324	if (padlist)
325	{
326	put_padlist (aTHX_ cv); /* mark this padlist as available */	332	put_padlist (cv); /* mark this padlist as available */
327	CvPADLIST(cv) = padlist;	333	CvDEPTH (cv) = PTR2IV (POPs);
328	}	334	CvPADLIST (cv) = (AV *)POPs;
329
330	++CvDEPTH(cv);
331	}	335	}
332		336
333	PUTBACK;	337	PUTBACK;
334	}	338	}
335	}	339	}
336		340
337	static void	341	static void
338	save_state(pTHX_ Coro__State c, int flags)	342	save_perl (Coro__State c)
339	{	343	{
340	{	344	{
341	dSP;	345	dSP;
342	I32 cxix = cxstack_ix;	346	I32 cxix = cxstack_ix;
343	PERL_CONTEXT *ccstk = cxstack;	347	PERL_CONTEXT *ccstk = cxstack;
…		…
346	/*	350	/*
347	* the worst thing you can imagine happens first - we have to save	351	* the worst thing you can imagine happens first - we have to save
348	* (and reinitialize) all cv's in the whole callchain :(	352	* (and reinitialize) all cv's in the whole callchain :(
349	*/	353	*/
350		354
		355	EXTEND (SP, 3 + 1);
351	PUSHs (Nullsv);	356	PUSHs (Nullsv);
352	/* this loop was inspired by pp_caller */	357	/* this loop was inspired by pp_caller */
353	for (;;)	358	for (;;)
354	{	359	{
355	while (cxix >= 0)	360	while (cxix >= 0)
356	{	361	{
357	PERL_CONTEXT *cx = &ccstk[cxix--];	362	PERL_CONTEXT *cx = &ccstk[cxix--];
358		363
359	if (CxTYPE(cx) == CXt_SUB)	364	if (CxTYPE (cx) == CXt_SUB)
360	{	365	{
361	CV *cv = cx->blk_sub.cv;	366	CV *cv = cx->blk_sub.cv;
		367
362	if (CvDEPTH(cv))	368	if (CvDEPTH (cv))
363	{	369	{
364	EXTEND (SP, CvDEPTH(cv)*2);	370	EXTEND (SP, 3);
365
366	while (--CvDEPTH(cv))
367	{
368	/* this tells the restore code to increment CvDEPTH */
369	PUSHs (Nullsv);
370	PUSHs ((SV *)cv);
371	}
372
373	PUSHs ((SV *)CvPADLIST(cv));	371	PUSHs ((SV *)CvPADLIST (cv));
		372	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
374	PUSHs ((SV *)cv);	373	PUSHs ((SV *)cv);
375		374
		375	CvDEPTH (cv) = 0;
376	get_padlist (aTHX_ cv);	376	get_padlist (cv);
377	}	377	}
378	}	378	}
379	#ifdef CXt_FORMAT
380	else if (CxTYPE(cx) == CXt_FORMAT)
381	{
382	/* I never used formats, so how should I know how these are implemented? */
383	/* my bold guess is as a simple, plain sub... */
384	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
385	}
386	#endif
387	}	379	}
388		380
389	if (top_si->si_type == PERLSI_MAIN)	381	if (top_si->si_type == PERLSI_MAIN)
390	break;	382	break;
391		383
…		…
395	}	387	}
396		388
397	PUTBACK;	389	PUTBACK;
398	}	390	}
399		391
400	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	392	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
401	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	393	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
402	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	394	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		395	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
403		396
404	c->dowarn = PL_dowarn;	397	#define VAR(name,type)c->name = PL_ ## name;
405	c->in_eval = PL_in_eval;	398	# include "state.h"
406		399	#undef VAR
407	c->curstackinfo = PL_curstackinfo;
408	c->curstack = PL_curstack;
409	c->mainstack = PL_mainstack;
410	c->stack_sp = PL_stack_sp;
411	c->op = PL_op;
412	c->curpad = PL_curpad;
413	c->comppad = PL_comppad;
414	c->compcv = PL_compcv;
415	c->stack_base = PL_stack_base;
416	c->stack_max = PL_stack_max;
417	c->tmps_stack = PL_tmps_stack;
418	c->tmps_floor = PL_tmps_floor;
419	c->tmps_ix = PL_tmps_ix;
420	c->tmps_max = PL_tmps_max;
421	c->markstack = PL_markstack;
422	c->markstack_ptr = PL_markstack_ptr;
423	c->markstack_max = PL_markstack_max;
424	c->scopestack = PL_scopestack;
425	c->scopestack_ix = PL_scopestack_ix;
426	c->scopestack_max = PL_scopestack_max;
427	c->savestack = PL_savestack;
428	c->savestack_ix = PL_savestack_ix;
429	c->savestack_max = PL_savestack_max;
430	#if PERL_VERSION < 9
431	c->retstack = PL_retstack;
432	c->retstack_ix = PL_retstack_ix;
433	c->retstack_max = PL_retstack_max;
434	#endif
435	c->curpm = PL_curpm;
436	c->curcop = PL_curcop;
437	}	400	}
438		401
439	/*	402	/*
440	* allocate various perl stacks. This is an exact copy	403	* allocate various perl stacks. This is an exact copy
441	* of perl.c:init_stacks, except that it uses less memory	404	* of perl.c:init_stacks, except that it uses less memory
442	* on the (sometimes correct) assumption that coroutines do	405	* on the (sometimes correct) assumption that coroutines do
443	* not usually need a lot of stackspace.	406	* not usually need a lot of stackspace.
444	*/	407	*/
		408	#if USE_PERL_INIT_STACKS
		409	# define coro_init_stacks init_stacks
		410	#else
		411
445	static void	412	static void
446	coro_init_stacks (pTHX)	413	coro_init_stacks ()
447	{	414	{
448	LOCK;
449
450	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	415	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
451	PL_curstackinfo->si_type = PERLSI_MAIN;	416	PL_curstackinfo->si_type = PERLSI_MAIN;
452	PL_curstack = PL_curstackinfo->si_stack;	417	PL_curstack = PL_curstackinfo->si_stack;
453	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	418	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454		419
455	PL_stack_base = AvARRAY(PL_curstack);	420	PL_stack_base = AvARRAY(PL_curstack);
456	PL_stack_sp = PL_stack_base;	421	PL_stack_sp = PL_stack_base;
457	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	422	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458		423
459	New(50,PL_tmps_stack,96,SV*);	424	New(50,PL_tmps_stack,128,SV*);
460	PL_tmps_floor = -1;	425	PL_tmps_floor = -1;
461	PL_tmps_ix = -1;	426	PL_tmps_ix = -1;
462	PL_tmps_max = 96;	427	PL_tmps_max = 128;
463		428
464	New(54,PL_markstack,16,I32);	429	New(54,PL_markstack,32,I32);
465	PL_markstack_ptr = PL_markstack;	430	PL_markstack_ptr = PL_markstack;
466	PL_markstack_max = PL_markstack + 16;	431	PL_markstack_max = PL_markstack + 32;
467		432
468	#ifdef SET_MARK_OFFSET	433	#ifdef SET_MARK_OFFSET
469	SET_MARK_OFFSET;	434	SET_MARK_OFFSET;
470	#endif	435	#endif
471		436
472	New(54,PL_scopestack,16,I32);	437	New(54,PL_scopestack,32,I32);
473	PL_scopestack_ix = 0;	438	PL_scopestack_ix = 0;
474	PL_scopestack_max = 16;	439	PL_scopestack_max = 32;
475		440
476	New(54,PL_savestack,96,ANY);	441	New(54,PL_savestack,64,ANY);
477	PL_savestack_ix = 0;	442	PL_savestack_ix = 0;
478	PL_savestack_max = 96;	443	PL_savestack_max = 64;
479		444
480	#if PERL_VERSION < 9	445	#if !PERL_VERSION_ATLEAST (5,9,0)
481	New(54,PL_retstack,8,OP*);	446	New(54,PL_retstack,16,OP*);
482	PL_retstack_ix = 0;	447	PL_retstack_ix = 0;
483	PL_retstack_max = 8;	448	PL_retstack_max = 16;
484	#endif	449	#endif
485
486	UNLOCK;
487	}	450	}
488		451
489	/*	452	/*
490	* destroy the stacks, the callchain etc...	453	* destroy the stacks, the callchain etc...
491	*/	454	*/
492	static void	455	static void
493	destroy_stacks(pTHX)	456	coro_destroy_stacks ()
494	{	457	{
495	if (!IN_DESTRUCT)	458	if (!IN_DESTRUCT)
496	{	459	{
497	/* is this ugly, I ask? */	460	/* restore all saved variables and stuff */
498	LEAVE_SCOPE (0);	461	LEAVE_SCOPE (0);
		462	assert (PL_tmps_floor == -1);
499		463
500	/* sure it is, but more important: is it correct?? :/ */	464	/* free all temporaries */
501	FREETMPS;	465	FREETMPS;
		466	assert (PL_tmps_ix == -1);
502		467
503	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	468	POPSTACK_TO (PL_mainstack);
504	}	469	}
505		470
506	while (PL_curstackinfo->si_next)	471	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;	472	PL_curstackinfo = PL_curstackinfo->si_next;
508		473
509	while (PL_curstackinfo)	474	while (PL_curstackinfo)
510	{	475	{
511	PERL_SI *p = PL_curstackinfo->si_prev;	476	PERL_SI *p = PL_curstackinfo->si_prev;
512		477
513	{ /*D*//*remove*/
514	dSP;
515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516	PUTBACK; /* possibly superfluous */
517	}
518
519	if (!IN_DESTRUCT)	478	if (!IN_DESTRUCT)
520	{
521	dounwind (-1);/*D*//*remove*/
522	SvREFCNT_dec (PL_curstackinfo->si_stack);	479	SvREFCNT_dec (PL_curstackinfo->si_stack);
523	}
524		480
525	Safefree (PL_curstackinfo->si_cxstack);	481	Safefree (PL_curstackinfo->si_cxstack);
526	Safefree (PL_curstackinfo);	482	Safefree (PL_curstackinfo);
527	PL_curstackinfo = p;	483	PL_curstackinfo = p;
528	}	484	}
529		485
530	Safefree (PL_tmps_stack);	486	Safefree (PL_tmps_stack);
531	Safefree (PL_markstack);	487	Safefree (PL_markstack);
532	Safefree (PL_scopestack);	488	Safefree (PL_scopestack);
533	Safefree (PL_savestack);	489	Safefree (PL_savestack);
534	#if PERL_VERSION < 9	490	#if !PERL_VERSION_ATLEAST (5,9,0)
535	Safefree (PL_retstack);	491	Safefree (PL_retstack);
536	#endif	492	#endif
537	}	493	}
		494	#endif
538		495
539	static void	496	static void
540	setup_coro (struct coro *coro)	497	setup_coro (struct coro *coro)
541	{	498	{
542	/*	499	/*
543	* emulate part of the perl startup here.	500	* emulate part of the perl startup here.
544	*/	501	*/
545	dTHX;
546	dSP;
547	UNOP myop;
548	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
549		502
550	coro_init_stacks (aTHX);	503	coro_init_stacks ();
551	/*PL_curcop = 0;*/	504
552	/*PL_in_eval = PL_in_eval;*/ /* inherit */	505	PL_curcop = &PL_compiling;
		506	PL_in_eval = EVAL_NULL;
		507	PL_curpm = 0;
		508	PL_localizing = 0;
		509	PL_dirty = 0;
		510	PL_restartop = 0;
		511
		512	{
		513	dSP;
		514	LOGOP myop;
		515
553	SvREFCNT_dec (GvAV (PL_defgv));	516	SvREFCNT_dec (GvAV (PL_defgv));
554	GvAV (PL_defgv) = coro->args; coro->args = 0;	517	GvAV (PL_defgv) = coro->args; coro->args = 0;
555		518
556	SPAGAIN;
557
558	Zero (&myop, 1, UNOP);	519	Zero (&myop, 1, LOGOP);
559	myop.op_next = Nullop;	520	myop.op_next = Nullop;
560	myop.op_flags = OPf_WANT_VOID;	521	myop.op_flags = OPf_WANT_VOID;
561		522
		523	PUSHMARK (SP);
		524	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		525	PUTBACK;
562	PL_op = (OP *)&myop;	526	PL_op = (OP *)&myop;
563
564	PUSHMARK(SP);
565	XPUSHs (sub_init);
566	PUTBACK;
567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	527	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
568	SPAGAIN;	528	SPAGAIN;
		529	}
569		530
570	ENTER; /* necessary e.g. for dounwind */	531	ENTER; /* necessary e.g. for dounwind */
571	}	532	}
572		533
573	static void	534	static void
…		…
578	SvREFCNT_dec (coro_mortal);	539	SvREFCNT_dec (coro_mortal);
579	coro_mortal = 0;	540	coro_mortal = 0;
580	}	541	}
581	}	542	}
582		543
		544	/* inject a fake call to Coro::State::_cctx_init into the execution */
		545	static void NOINLINE
		546	prepare_cctx (coro_cctx *cctx)
		547	{
		548	dSP;
		549	LOGOP myop;
		550
		551	Zero (&myop, 1, LOGOP);
		552	myop.op_next = PL_op;
		553	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		554
		555	PUSHMARK (SP);
		556	EXTEND (SP, 2);
		557	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		558	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		559	PUTBACK;
		560	PL_op = (OP *)&myop;
		561	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		562	SPAGAIN;
		563	}
		564
583	static void	565	static void
584	coro_run (void *arg)	566	coro_run (void *arg)
585	{	567	{
		568	/* coro_run is the alternative tail of transfer(), so unlock here. */
		569	UNLOCK;
		570
586	/*	571	/*
587	* this is a _very_ stripped down perl interpreter ;)	572	* this is a _very_ stripped down perl interpreter ;)
588	*/	573	*/
589	dTHX;
590
591	UNLOCK;
592
593	PL_top_env = &PL_start_env;	574	PL_top_env = &PL_start_env;
594		575
595	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));	576	/* inject call to cctx_init */
596	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));	577	prepare_cctx ((coro_cctx *)arg);
597		578
598	/* continue at cctx_init, without entersub */
599	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
600
601	/* somebody will hit me for both perl_run and PL_restart_op */	579	/* somebody will hit me for both perl_run and PL_restartop */
602	perl_run (aTHX_ PERL_GET_CONTEXT);	580	PL_restartop = PL_op;
		581	perl_run (PL_curinterp);
603		582
		583	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
604	abort ();	584	abort ();
605	}	585	}
606		586
607	static coro_stack *	587	static coro_cctx *
608	stack_new ()	588	cctx_new ()
609	{	589	{
610	coro_stack *stack;	590	coro_cctx *cctx;
611		591
		592	++cctx_count;
		593
612	New (0, stack, 1, coro_stack);	594	Newz (0, cctx, 1, coro_cctx);
613		595
614	#if HAVE_MMAP	596	#if HAVE_MMAP
615		597
616	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	598	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		599	/* mmap supposedly does allocate-on-write for us */
617	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	600	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
618		601
619	if (stack->sptr == (void *)-1)	602	if (cctx->sptr == (void *)-1)
620	{	603	{
621	perror ("FATAL: unable to mmap stack for coroutine");	604	perror ("FATAL: unable to mmap stack for coroutine");
622	_exit (EXIT_FAILURE);	605	_exit (EXIT_FAILURE);
623	}	606	}
624		607
		608	# if STACKGUARD
625	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	609	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		610	# endif
626		611
627	#else	612	#else
628		613
629	stack->ssize = STACKSIZE * (long)sizeof (long);	614	cctx->ssize = STACKSIZE * (long)sizeof (long);
630	New (0, stack->sptr, STACKSIZE, long);	615	New (0, cctx->sptr, STACKSIZE, long);
631		616
632	if (!stack->sptr)	617	if (!cctx->sptr)
633	{	618	{
634	perror (stderr, "FATAL: unable to malloc stack for coroutine");	619	perror ("FATAL: unable to malloc stack for coroutine");
635	_exit (EXIT_FAILURE);	620	_exit (EXIT_FAILURE);
636	}	621	}
637		622
638	#endif	623	#endif
639		624
		625	#if USE_VALGRIND
		626	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		627	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		628	cctx->ssize + (char *)cctx->sptr
		629	);
		630	#endif
		631
640	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	632	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
641		633
642	return stack;	634	return cctx;
643	}	635	}
644		636
645	static void	637	static void
646	stack_free (coro_stack *stack)	638	cctx_destroy (coro_cctx *cctx)
647	{	639	{
648	if (!stack || stack == main_stack)	640	if (!cctx)
649	return;	641	return;
650		642
		643	--cctx_count;
		644
		645	#if USE_VALGRIND
		646	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		647	#endif
		648
651	#if HAVE_MMAP	649	#if HAVE_MMAP
652	munmap (stack->sptr, stack->ssize);	650	munmap (cctx->sptr, cctx->ssize);
653	#else	651	#else
654	Safefree (stack->sptr);	652	Safefree (cctx->sptr);
655	#endif	653	#endif
656		654
657	Safefree (stack);	655	Safefree (cctx);
658	}	656	}
659		657
660	static coro_stack *stack_first;
661
662	static coro_stack *	658	static coro_cctx *
663	stack_get ()	659	cctx_get ()
664	{	660	{
665	coro_stack *stack;	661	coro_cctx *cctx;
666		662
667	if (stack_first)	663	if (cctx_first)
668	{	664	{
669	stack = stack_first;	665	cctx = cctx_first;
670	stack_first = stack->next;	666	cctx_first = cctx->next;
		667	--cctx_idle;
671	}	668	}
672	else	669	else
673	{	670	{
674	stack = stack_new ();	671	cctx = cctx_new ();
675	PL_op = PL_op->op_next;	672	PL_op = PL_op->op_next;
676	}	673	}
677		674
678	return stack;	675	return cctx;
679	}	676	}
680		677
681	static void	678	static void
682	stack_put (coro_stack *stack)	679	cctx_put (coro_cctx *cctx)
683	{	680	{
684	stack->next = stack_first;	681	/* free another cctx if overlimit */
685	stack_first = stack;	682	if (cctx_idle >= MAX_IDLE_CCTX)
		683	{
		684	coro_cctx *first = cctx_first;
		685	cctx_first = first->next;
		686	--cctx_idle;
		687
		688	assert (!first->inuse);
		689	cctx_destroy (first);
		690	}
		691
		692	++cctx_idle;
		693	cctx->next = cctx_first;
		694	cctx_first = cctx;
686	}	695	}
687		696
688	/* never call directly, always through the coro_state_transfer global variable */	697	/* never call directly, always through the coro_state_transfer global variable */
689	static void	698	static void NOINLINE
690	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	699	transfer (struct coro *prev, struct coro *next)
691	{	700	{
692	dSTACKLEVEL;	701	dSTACKLEVEL;
693		702
694	/* sometimes transfer is only called to set idle_sp */	703	/* sometimes transfer is only called to set idle_sp */
695	if (flags == TRANSFER_SET_STACKLEVEL)	704	if (!next)
		705	{
696	((coro_stack *)prev)->idle_sp = STACKLEVEL;	706	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		707	assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */
		708	}
697	else if (prev != next)	709	else if (prev != next)
698	{	710	{
699	coro_stack *prev__stack;	711	coro_cctx *prev__cctx;
		712
		713	if (prev->flags & CF_NEW)
		714	{
		715	/* create a new empty context */
		716	Newz (0, prev->cctx, 1, coro_cctx);
		717	prev->cctx->inuse = 1;
		718	prev->flags &= ~CF_NEW;
		719	prev->flags |= CF_RUNNING;
		720	}
		721
		722	/*TODO: must not croak here */
		723	if (!prev->flags & CF_RUNNING)
		724	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		725
		726	if (next->flags & CF_RUNNING)
		727	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		728
		729	prev->flags &= ~CF_RUNNING;
		730	next->flags |= CF_RUNNING;
700		731
701	LOCK;	732	LOCK;
702		733
703	if (next->mainstack)	734	if (next->flags & CF_NEW)
704	{	735	{
705	/* coroutine already started */	736	/* need to start coroutine */
706	SAVE (prev, flags);	737	next->flags &= ~CF_NEW;
707	LOAD (next);	738	/* first get rid of the old state */
		739	save_perl (prev);
		740	/* setup coroutine call */
		741	setup_coro (next);
		742	/* need a new stack */
		743	assert (!next->cctx);
708	}	744	}
709	else	745	else
710	{	746	{
711	/* need to start coroutine */	747	/* coroutine already started */
712	/* first get rid of the old state */	748	save_perl (prev);
713	SAVE (prev, -1);	749	load_perl (next);
714	/* setup coroutine call */
715	setup_coro (next);
716	/* need a stack */
717	next->stack = 0;
718	}	750	}
719		751
720	prev__stack = prev->stack;	752	prev__cctx = prev->cctx;
721		753
722	/* possibly "free" the stack */	754	/* possibly "free" the cctx */
723	if (prev__stack->idle_sp == STACKLEVEL)	755	if (prev__cctx->idle_sp == STACKLEVEL)
724	{	756	{
725	stack_put (prev__stack);	757	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		758	assert (PL_top_env == prev__cctx->top_env);
		759
726	prev->stack = 0;	760	prev->cctx = 0;
		761
		762	cctx_put (prev__cctx);
		763	prev__cctx->inuse = 0;
727	}	764	}
728		765
729	if (!next->stack)	766	if (!next->cctx)
730	next->stack = stack_get ();
731
732	if (prev__stack != next->stack)
733	{	767	{
		768	next->cctx = cctx_get ();
		769	assert (!next->cctx->inuse);
		770	next->cctx->inuse = 1;
		771	}
		772
		773	if (prev__cctx != next->cctx)
		774	{
734	prev__stack->top_env = PL_top_env;	775	prev__cctx->top_env = PL_top_env;
735	PL_top_env = next->stack->top_env;	776	PL_top_env = next->cctx->top_env;
736	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	777	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
737	}	778	}
738		779
739	free_coro_mortal ();	780	free_coro_mortal ();
740		781
741	UNLOCK;	782	UNLOCK;
742	}	783	}
743	}	784	}
744		785
745	/* use this function pointer to call the above function */
746	/* this is done to increase chances of the compiler not inlining the call */
747	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
748	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
749
750	struct transfer_args	786	struct transfer_args
751	{	787	{
752	struct coro *prev, *next;	788	struct coro *prev, *next;
753	int flags;
754	};	789	};
755		790
756	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	791	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
757		792
758	static void	793	static void
759	coro_state_destroy (struct coro *coro)	794	coro_state_destroy (struct coro *coro)
760	{	795	{
761	if (coro->refcnt--)	796	if (coro->refcnt--)
762	return;	797	return;
763		798
764	if (coro->mainstack && coro->mainstack != main_mainstack)	799	if (coro->mainstack && coro->mainstack != main_mainstack)
765	{	800	{
766	struct coro temp;	801	struct coro temp;
		802	Zero (&temp, 1, struct coro);
		803	temp.save = CORO_SAVE_ALL;
767		804
768	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	805	if (coro->flags & CF_RUNNING)
769	LOAD (aTHX_ coro);	806	croak ("FATAL: tried to destroy currently running coroutine");
770		807
		808	save_perl (&temp);
		809	load_perl (coro);
		810
771	destroy_stacks (aTHX);	811	coro_destroy_stacks ();
772		812
773	LOAD ((&temp)); /* this will get rid of defsv etc.. */	813	load_perl (&temp); /* this will get rid of defsv etc.. */
774		814
775	coro->mainstack = 0;	815	coro->mainstack = 0;
776	}	816	}
777		817
778	stack_free (coro->stack);	818	cctx_destroy (coro->cctx);
779	SvREFCNT_dec (coro->args);	819	SvREFCNT_dec (coro->args);
780	Safefree (coro);	820	Safefree (coro);
781	}	821	}
782		822
783	static int	823	static int
784	coro_state_clear (SV *sv, MAGIC *mg)	824	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
785	{	825	{
786	struct coro *coro = (struct coro *)mg->mg_ptr;	826	struct coro *coro = (struct coro *)mg->mg_ptr;
787	mg->mg_ptr = 0;	827	mg->mg_ptr = 0;
788		828
789	coro_state_destroy (coro);	829	coro_state_destroy (coro);
790		830
791	return 0;	831	return 0;
792	}	832	}
793		833
794	static int	834	static int
795	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	835	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
796	{	836	{
797	struct coro *coro = (struct coro *)mg->mg_ptr;	837	struct coro *coro = (struct coro *)mg->mg_ptr;
798		838
799	++coro->refcnt;	839	++coro->refcnt;
800		840
801	return 0;	841	return 0;
802	}	842	}
803		843
804	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	844	static MGVTBL coro_state_vtbl = {
		845	0, 0, 0, 0,
		846	coro_state_clear,
		847	0,
		848	#ifdef MGf_DUP
		849	coro_state_dup,
		850	#else
		851	# define MGf_DUP 0
		852	#endif
		853	};
805		854
806	static struct coro *	855	static struct coro *
807	SvSTATE (SV *coro)	856	SvSTATE (SV *coro)
808	{	857	{
809	HV *stash;	858	HV *stash;
…		…
824	assert (mg->mg_type == PERL_MAGIC_ext);	873	assert (mg->mg_type == PERL_MAGIC_ext);
825	return (struct coro *)mg->mg_ptr;	874	return (struct coro *)mg->mg_ptr;
826	}	875	}
827		876
828	static void	877	static void
829	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	878	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
830	{	879	{
831	ta->prev = SvSTATE (prev);	880	ta->prev = SvSTATE (prev_sv);
832	ta->next = SvSTATE (next);	881	ta->next = SvSTATE (next_sv);
833	ta->flags = flags;
834	}	882	}
835		883
836	static void	884	static void
837	api_transfer (SV *prev, SV *next, int flags)	885	api_transfer (SV *prev_sv, SV *next_sv)
838	{	886	{
839	dTHX;
840	struct transfer_args ta;	887	struct transfer_args ta;
841		888
842	prepare_transfer (aTHX_ &ta, prev, next, flags);	889	prepare_transfer (&ta, prev_sv, next_sv);
843	TRANSFER (ta);	890	TRANSFER (ta);
		891	}
		892
		893	static int
		894	api_save (SV *coro_sv, int new_save)
		895	{
		896	struct coro *coro = SvSTATE (coro_sv);
		897	int old_save = coro->save;
		898
		899	if (new_save >= 0)
		900	coro->save = new_save;
		901
		902	return old_save;
844	}	903	}
845		904
846	/** Coro ********************************************************************/	905	/** Coro ********************************************************************/
847		906
848	#define PRIO_MAX 3	907	#define PRIO_MAX 3
…		…
851	#define PRIO_LOW -1	910	#define PRIO_LOW -1
852	#define PRIO_IDLE -3	911	#define PRIO_IDLE -3
853	#define PRIO_MIN -4	912	#define PRIO_MIN -4
854		913
855	/* for Coro.pm */	914	/* for Coro.pm */
856	static GV *coro_current, *coro_idle;	915	static SV *coro_current;
857	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	916	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
858	static int coro_nready;	917	static int coro_nready;
859		918
860	static void	919	static void
861	coro_enq (pTHX_ SV *sv)	920	coro_enq (SV *coro_sv)
862	{	921	{
863	int prio;
864
865	if (SvTYPE (sv) != SVt_PVHV)
866	croak ("Coro::ready tried to enqueue something that is not a coroutine");
867
868	prio = SvSTATE (sv)->prio;
869
870	av_push (coro_ready [prio - PRIO_MIN], sv);	922	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
871	coro_nready++;	923	coro_nready++;
872	}	924	}
873		925
874	static SV *	926	static SV *
875	coro_deq (pTHX_ int min_prio)	927	coro_deq (int min_prio)
876	{	928	{
877	int prio = PRIO_MAX - PRIO_MIN;	929	int prio = PRIO_MAX - PRIO_MIN;
878		930
879	min_prio -= PRIO_MIN;	931	min_prio -= PRIO_MIN;
880	if (min_prio < 0)	932	if (min_prio < 0)
…		…
888	}	940	}
889		941
890	return 0;	942	return 0;
891	}	943	}
892		944
893	static void	945	static int
894	api_ready (SV *coro)	946	api_ready (SV *coro_sv)
895	{	947	{
896	dTHX;	948	struct coro *coro;
897		949
898	if (SvROK (coro))	950	if (SvROK (coro_sv))
899	coro = SvRV (coro);	951	coro_sv = SvRV (coro_sv);
		952
		953	coro = SvSTATE (coro_sv);
		954
		955	if (coro->flags & CF_READY)
		956	return 0;
		957
		958	#if 0 /* this is actually harmless */
		959	if (coro->flags & CF_RUNNING)
		960	croak ("Coro::ready called on currently running coroutine");
		961	#endif
		962
		963	coro->flags |= CF_READY;
900		964
901	LOCK;	965	LOCK;
902	coro_enq (aTHX_ SvREFCNT_inc (coro));	966	coro_enq (SvREFCNT_inc (coro_sv));
903	UNLOCK;	967	UNLOCK;
904	}
905		968
		969	return 1;
		970	}
		971
906	static void	972	static int
		973	api_is_ready (SV *coro_sv)
		974	{
		975	return !!SvSTATE (coro_sv)->flags & CF_READY;
		976	}
		977
		978	static void
907	prepare_schedule (aTHX_ struct transfer_args *ta)	979	prepare_schedule (struct transfer_args *ta)
908	{	980	{
909	SV *current, *prev, *next;	981	SV *prev, *next;
910
911	LOCK;
912
913	current = GvSV (coro_current);
914		982
915	for (;;)	983	for (;;)
916	{	984	{
917	LOCK;	985	LOCK;
918
919	next = coro_deq (aTHX_ PRIO_MIN);	986	next = coro_deq (PRIO_MIN);
		987	UNLOCK;
920		988
921	if (next)	989	if (next)
922	break;	990	break;
923		991
924	UNLOCK;
925
926	{	992	{
927	dSP;	993	dSP;
928		994
929	ENTER;	995	ENTER;
930	SAVETMPS;	996	SAVETMPS;
931		997
932	PUSHMARK (SP);	998	PUSHMARK (SP);
933	PUTBACK;	999	PUTBACK;
934	call_sv (GvSV (coro_idle), G_DISCARD);	1000	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
935		1001
936	FREETMPS;	1002	FREETMPS;
937	LEAVE;	1003	LEAVE;
938	}	1004	}
939	}	1005	}
940		1006
941	prev = SvRV (current);	1007	prev = SvRV (coro_current);
942	SvRV (current) = next;	1008	SvRV_set (coro_current, next);
943		1009
944	/* free this only after the transfer */	1010	/* free this only after the transfer */
		1011	LOCK;
945	free_coro_mortal ();	1012	free_coro_mortal ();
		1013	UNLOCK;
946	coro_mortal = prev;	1014	coro_mortal = prev;
947		1015
		1016	assert (!SvROK(prev));//D
		1017	assert (!SvROK(next));//D
		1018
948	ta->prev = SvSTATE (prev);	1019	ta->prev = SvSTATE (prev);
949	ta->next = SvSTATE (next);	1020	ta->next = SvSTATE (next);
950	ta->flags = TRANSFER_SAVE_ALL;
951		1021
952	UNLOCK;	1022	assert (ta->next->flags & CF_READY);
		1023	ta->next->flags &= ~CF_READY;
953	}	1024	}
954		1025
955	static void	1026	static void
956	prepare_cede (aTHX_ struct transfer_args *ta)	1027	prepare_cede (struct transfer_args *ta)
957	{	1028	{
958	LOCK;	1029	api_ready (coro_current);
959	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
960	UNLOCK;
961		1030
962	prepare_schedule (ta);	1031	prepare_schedule (ta);
963	}	1032	}
964		1033
965	static void	1034	static void
966	api_schedule (void)	1035	api_schedule (void)
967	{	1036	{
968	dTHX;
969	struct transfer_args ta;	1037	struct transfer_args ta;
970		1038
971	prepare_schedule (&ta);	1039	prepare_schedule (&ta);
972	TRANSFER (ta);	1040	TRANSFER (ta);
973	}	1041	}
974		1042
975	static void	1043	static void
976	api_cede (void)	1044	api_cede (void)
977	{	1045	{
978	dTHX;
979	struct transfer_args ta;	1046	struct transfer_args ta;
980		1047
981	prepare_cede (&ta);	1048	prepare_cede (&ta);
982	TRANSFER (ta);	1049	TRANSFER (ta);
983	}	1050	}
…		…
993	#endif	1060	#endif
994	BOOT_PAGESIZE;	1061	BOOT_PAGESIZE;
995		1062
996	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1063	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
997		1064
998	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1065	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
999	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1066	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1000	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1067	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1068	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1069	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1001		1070
1002	main_mainstack = PL_mainstack;	1071	main_mainstack = PL_mainstack;
1003		1072
1004	coroapi.ver = CORO_API_VERSION;	1073	coroapi.ver = CORO_API_VERSION;
1005	coroapi.transfer = api_transfer;	1074	coroapi.transfer = api_transfer;
1006
1007	Newz (0, main_stack, 1, coro_stack);
1008	main_stack->idle_sp = (void *)-1;
1009		1075
1010	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1076	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1011	}	1077	}
1012		1078
1013	SV *	1079	SV *
…		…
1018	HV *hv;	1084	HV *hv;
1019	int i;	1085	int i;
1020		1086
1021	Newz (0, coro, 1, struct coro);	1087	Newz (0, coro, 1, struct coro);
1022	coro->args = newAV ();	1088	coro->args = newAV ();
		1089	coro->save = CORO_SAVE_ALL;
		1090	coro->flags = CF_NEW;
1023		1091
1024	hv = newHV ();	1092	hv = newHV ();
1025	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1093	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1026	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1094	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1027		1095
1028	for (i = 1; i < items; i++)	1096	for (i = 1; i < items; i++)
1029	av_push (coro->args, newSVsv (ST (i)));	1097	av_push (coro->args, newSVsv (ST (i)));
1030
1031	coro->stack = main_stack;
1032	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1033	/*coro->stack = 0;*/
1034	}	1098	}
1035	OUTPUT:	1099	OUTPUT:
1036	RETVAL	1100	RETVAL
1037		1101
		1102	int
		1103	save (SV *coro, int new_save = -1)
		1104	CODE:
		1105	RETVAL = api_save (coro, new_save);
		1106	OUTPUT:
		1107	RETVAL
		1108
1038	void	1109	void
1039	transfer (...)	1110	_set_stacklevel (...)
1040	ALIAS:	1111	ALIAS:
1041	Coro::schedule = 1	1112	Coro::State::transfer = 1
1042	Coro::cede = 2	1113	Coro::schedule = 2
1043	_set_stacklevel = 3	1114	Coro::cede = 3
1044	CODE:	1115	CODE:
1045	{	1116	{
1046	struct transfer_args ta;	1117	struct transfer_args ta;
1047		1118
1048	switch (ix)	1119	switch (ix)
1049	{	1120	{
1050	case 0:	1121	case 0:
1051	if (items != 3)	1122	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1052	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1123	ta.next = 0;
1053
1054	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1055	break;	1124	break;
1056		1125
1057	case 1:	1126	case 1:
		1127	if (items != 2)
		1128	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1129
		1130	prepare_transfer (&ta, ST (0), ST (1));
		1131	break;
		1132
		1133	case 2:
1058	prepare_schedule (&ta);	1134	prepare_schedule (&ta);
1059	break;	1135	break;
1060		1136
1061	case 2:	1137	case 3:
1062	prepare_cede (&ta);	1138	prepare_cede (&ta);
1063	break;
1064
1065	case 3:
1066	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
1067	ta.next = 0;
1068	ta.flags = TRANSFER_SET_STACKLEVEL;
1069	break;	1139	break;
1070	}	1140	}
1071		1141
1072	TRANSFER (ta);	1142	TRANSFER (ta);
1073	}	1143	}
…		…
1081	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);	1151	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1082		1152
1083	++coro_src->refcnt;	1153	++coro_src->refcnt;
1084	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;	1154	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1085	}	1155	}
1086
1087	void
1088	_nonlocal_goto (IV nextop)
1089	CODE:
1090	/* uuh, somebody will kill me again for this */
1091	PL_op->op_next = INT2PTR (OP *, nextop);
1092		1156
1093	void	1157	void
1094	_exit (code)	1158	_exit (code)
1095	int code	1159	int code
1096	PROTOTYPE: $	1160	PROTOTYPE: $
1097	CODE:	1161	CODE:
1098	_exit (code);	1162	_exit (code);
1099		1163
1100	MODULE = Coro::State PACKAGE = Coro::Cont	1164	int
		1165	cctx_count ()
		1166	CODE:
		1167	RETVAL = cctx_count;
		1168	OUTPUT:
		1169	RETVAL
1101		1170
1102	void	1171	int
1103	yield (...)	1172	cctx_idle ()
1104	PROTOTYPE: @	1173	CODE:
1105	CODE:	1174	RETVAL = cctx_idle;
1106	{	1175	OUTPUT:
1107	SV *yieldstack;	1176	RETVAL
1108	SV *sv;
1109	AV *defav = GvAV (PL_defgv);
1110	struct coro *prev, *next;
1111
1112	yieldstack = *hv_fetch (
1113	(HV *)SvRV (GvSV (coro_current)),
1114	"yieldstack", sizeof ("yieldstack") - 1,
1115	0
1116	);
1117
1118	/* set up @_ -- ugly */
1119	av_clear (defav);
1120	av_fill (defav, items - 1);
1121	while (items--)
1122	av_store (defav, items, SvREFCNT_inc (ST(items)));
1123
1124	sv = av_pop ((AV *)SvRV (yieldstack));
1125	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1126	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1127	SvREFCNT_dec (sv);
1128
1129	coro_state_transfer (aTHX_ prev, next, 0);
1130	}
1131		1177
1132	MODULE = Coro::State PACKAGE = Coro	1178	MODULE = Coro::State PACKAGE = Coro
1133		1179
1134	BOOT:	1180	BOOT:
1135	{	1181	{
…		…
1142	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1188	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1143	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1189	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1144	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1190	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1145	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1191	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1146		1192
1147	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1193	coro_current = get_sv ("Coro::current", FALSE);
1148	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1194	SvREADONLY_on (coro_current);
1149		1195
1150	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1196	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1151	coro_ready[i] = newAV ();	1197	coro_ready[i] = newAV ();
1152		1198
1153	{	1199	{
1154	SV *sv = perl_get_sv("Coro::API", 1);	1200	SV *sv = perl_get_sv("Coro::API", 1);
1155		1201
1156	coroapi.schedule = api_schedule;	1202	coroapi.schedule = api_schedule;
		1203	coroapi.save = api_save;
1157	coroapi.cede = api_cede;	1204	coroapi.cede = api_cede;
1158	coroapi.ready = api_ready;	1205	coroapi.ready = api_ready;
		1206	coroapi.is_ready = api_is_ready;
1159	coroapi.nready = &coro_nready;	1207	coroapi.nready = &coro_nready;
1160	coroapi.current = coro_current;	1208	coroapi.current = coro_current;
1161		1209
1162	GCoroAPI = &coroapi;	1210	GCoroAPI = &coroapi;
1163	sv_setiv (sv, (IV)&coroapi);	1211	sv_setiv (sv, (IV)&coroapi);
1164	SvREADONLY_on (sv);	1212	SvREADONLY_on (sv);
1165	}	1213	}
1166	}	1214	}
		1215
		1216	void
		1217	_set_current (SV *current)
		1218	PROTOTYPE: $
		1219	CODE:
		1220	SvREFCNT_dec (SvRV (coro_current));
		1221	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1167		1222
1168	int	1223	int
1169	prio (Coro::State coro, int newprio = 0)	1224	prio (Coro::State coro, int newprio = 0)
1170	ALIAS:	1225	ALIAS:
1171	nice = 1	1226	nice = 1
…		…
1183		1238
1184	coro->prio = newprio;	1239	coro->prio = newprio;
1185	}	1240	}
1186	}	1241	}
1187		1242
1188	void	1243	SV *
1189	ready (SV *self)	1244	ready (SV *self)
1190	PROTOTYPE: $	1245	PROTOTYPE: $
1191	CODE:	1246	CODE:
1192	api_ready (self);	1247	RETVAL = boolSV (api_ready (self));
		1248	OUTPUT:
		1249	RETVAL
		1250
		1251	SV *
		1252	is_ready (SV *self)
		1253	PROTOTYPE: $
		1254	CODE:
		1255	RETVAL = boolSV (api_is_ready (self));
		1256	OUTPUT:
		1257	RETVAL
1193		1258
1194	int	1259	int
1195	nready (...)	1260	nready (...)
1196	PROTOTYPE:	1261	PROTOTYPE:
1197	CODE:	1262	CODE:
…		…
1203		1268
1204	SV *	1269	SV *
1205	_get_state ()	1270	_get_state ()
1206	CODE:	1271	CODE:
1207	{	1272	{
1208	struct {	1273	struct io_state *data;
1209	int errorno;
1210	int laststype;
1211	int laststatval;
1212	Stat_t statcache;
1213	} data;
1214		1274
		1275	RETVAL = newSV (sizeof (struct io_state));
		1276	data = (struct io_state *)SvPVX (RETVAL);
		1277	SvCUR_set (RETVAL, sizeof (struct io_state));
		1278	SvPOK_only (RETVAL);
		1279
1215	data.errorno = errno;	1280	data->errorno = errno;
1216	data.laststype = PL_laststype;	1281	data->laststype = PL_laststype;
1217	data.laststatval = PL_laststatval;	1282	data->laststatval = PL_laststatval;
1218	data.statcache = PL_statcache;	1283	data->statcache = PL_statcache;
1219
1220	RETVAL = newSVpvn ((char *)&data, sizeof data);
1221	}	1284	}
1222	OUTPUT:	1285	OUTPUT:
1223	RETVAL	1286	RETVAL
1224		1287
1225	void	1288	void
1226	_set_state (char *data_)	1289	_set_state (char *data_)
1227	PROTOTYPE: $	1290	PROTOTYPE: $
1228	CODE:	1291	CODE:
1229	{	1292	{
1230	struct {	1293	struct io_state *data = (void *)data_;
1231	int errorno;
1232	int laststype;
1233	int laststatval;
1234	Stat_t statcache;
1235	} *data = (void *)data_;
1236		1294
1237	errno = data->errorno;	1295	errno = data->errorno;
1238	PL_laststype = data->laststype;	1296	PL_laststype = data->laststype;
1239	PL_laststatval = data->laststatval;	1297	PL_laststatval = data->laststatval;
1240	PL_statcache = data->statcache;	1298	PL_statcache = data->statcache;
1241	}	1299	}
		1300

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