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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.61 by root, Tue Aug 10 01:56:30 2004 UTC vs.
Revision 1.97 by root, Sun Nov 26 21:21:14 2006 UTC

1	#define PERL_NO_GET_CONTEXT	1	#define PERL_NO_GET_CONTEXT
		2
		3	#include "libcoro/coro.c"
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 PATCHLEVEL < 6	11	#if PERL_VERSION < 6
10	# ifndef PL_ppaddr	12	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	13	# define PL_ppaddr ppaddr
12	# endif	14	# endif
13	# ifndef call_sv	15	# ifndef call_sv
14	# define call_sv perl_call_sv	16	# define call_sv perl_call_sv
…		…
25	# ifndef IS_PADCONST	27	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	28	# define IS_PADCONST(v) 0
27	# endif	29	# endif
28	#endif	30	#endif
29		31
30	#include "libcoro/coro.c"
31
32	#include <signal.h>	32	#include <stdio.h>
		33	#include <errno.h>
		34
		35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		36	# undef STACKGUARD
		37	#endif
		38
		39	#ifndef STACKGUARD
		40	# define STACKGUARD 0
		41	#endif
33		42
34	#ifdef HAVE_MMAP	43	#ifdef HAVE_MMAP
35	# include <unistd.h>	44	# include <unistd.h>
36	# include <sys/mman.h>	45	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS	46	# ifndef MAP_ANONYMOUS
…		…
39	# define MAP_ANONYMOUS MAP_ANON	48	# define MAP_ANONYMOUS MAP_ANON
40	# else	49	# else
41	# undef HAVE_MMAP	50	# undef HAVE_MMAP
42	# endif	51	# endif
43	# endif	52	# endif
		53	# include <limits.h>
		54	# ifndef PAGESIZE
		55	# define PAGESIZE pagesize
		56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		57	static long pagesize;
		58	# else
		59	# define BOOT_PAGESIZE
44	#endif	60	# endif
45		61	#endif
46	#define SUB_INIT "Coro::State::initialize"
47	#define UCORO_STATE "_coro_state"
48		62
49	/* The next macro should declare a variable stacklevel that contains and approximation	63	/* The next macro should declare a variable stacklevel that contains and approximation
50	* to the current C stack pointer. Its property is that it changes with each call	64	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	65	* and should be unique. */
		66	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	67	#define STACKLEVEL ((void *)&stacklevel)
53		68
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	69	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		70
56	#define labs(l) ((l) >= 0 ? (l) : -(l))
57
58	#include "CoroAPI.h"	71	#include "CoroAPI.h"
		72
		73	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59		74
60	#ifdef USE_ITHREADS	75	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	76	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	77	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	78	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	79	#else
65	# define LOCK 0	80	# define LOCK (void)0
66	# define UNLOCK 0	81	# define UNLOCK (void)0
67	#endif	82	#endif
68		83
69	static struct CoroAPI coroapi;	84	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	85	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	86	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV *coro_mortal; /* will be freed after next transfer */	87	static SV *coro_mortal; /* will be freed after next transfer */
75		88
76	/* this is actually not only the c stack but also c registers etc... */	89	/* this is a structure representing a c-level coroutine */
77	typedef struct {	90	typedef struct coro_stack {
78	int refcnt; /* pointer reference counter */	91	struct coro_stack *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		92
82	coro_context cctx;	93	/* the stack */
83
84	void *sptr;	94	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	95	long ssize; /* positive == mmap, otherwise malloc */
		96
		97	/* cpu state */
		98	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		99	JMPENV *top_env;
		100	coro_context cctx;
86	} coro_stack;	101	} coro_stack;
87		102
		103	/* this is a structure representing a perl-level coroutine */
88	struct coro {	104	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	105	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;
91
92	/* the optional C context */
93	coro_stack *stack;	106	coro_stack *stack;
94	void *cursp;	107
		108	/* data associated with this coroutine (initial args) */
		109	AV *args;
95	int gencnt;	110	int refcnt;
96		111
97	/* optionally saved, might be zero */	112	/* optionally saved, might be zero */
98	AV *defav;	113	AV *defav;
99	SV *defsv;	114	SV *defsv;
100	SV *errsv;	115	SV *errsv;
…		…
109	AV *mainstack;	124	AV *mainstack;
110	SV **stack_sp;	125	SV **stack_sp;
111	OP *op;	126	OP *op;
112	SV **curpad;	127	SV **curpad;
113	AV *comppad;	128	AV *comppad;
		129	CV *compcv;
114	SV **stack_base;	130	SV **stack_base;
115	SV **stack_max;	131	SV **stack_max;
116	SV **tmps_stack;	132	SV **tmps_stack;
117	I32 tmps_floor;	133	I32 tmps_floor;
118	I32 tmps_ix;	134	I32 tmps_ix;
…		…
127	I32 savestack_ix;	143	I32 savestack_ix;
128	I32 savestack_max;	144	I32 savestack_max;
129	OP **retstack;	145	OP **retstack;
130	I32 retstack_ix;	146	I32 retstack_ix;
131	I32 retstack_max;	147	I32 retstack_max;
		148	PMOP *curpm;
132	COP *curcop;	149	COP *curcop;
133	JMPENV *top_env;
134		150
135	/* data associated with this coroutine (initial args) */	151	/* coro process data */
136	AV *args;	152	int prio;
137	};	153	};
138		154
139	typedef struct coro *Coro__State;	155	typedef struct coro *Coro__State;
140	typedef struct coro *Coro__State_or_hashref;	156	typedef struct coro *Coro__State_or_hashref;
141		157
142	/* mostly copied from op.c:cv_clone2 */	158	static AV *
143	STATIC AV *	159	coro_clone_padlist (pTHX_ CV *cv)
144	clone_padlist (pTHX_ AV *protopadlist)
145	{	160	{
146	AV *av;	161	AV *padlist = CvPADLIST (cv);
147	I32 ix;
148	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
149	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
150	SV **pname = AvARRAY (protopad_name);
151	SV **ppad = AvARRAY (protopad);
152	I32 fname = AvFILLp (protopad_name);
153	I32 fpad = AvFILLp (protopad);
154	AV *newpadlist, *newpad_name, *newpad;	162	AV *newpadlist, *newpad;
155	SV **npad;
156
157	newpad_name = newAV ();
158	for (ix = fname; ix >= 0; ix--)
159	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161	newpad = newAV ();
162	av_fill (newpad, AvFILLp (protopad));
163	npad = AvARRAY (newpad);
164		163
165	newpadlist = newAV ();	164	newpadlist = newAV ();
166	AvREAL_off (newpadlist);	165	AvREAL_off (newpadlist);
167	av_store (newpadlist, 0, (SV *) newpad_name);	166	#if PERL_VERSION < 9
		167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		168	#else
		169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		170	#endif
		171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		172	--AvFILLp (padlist);
		173
		174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
168	av_store (newpadlist, 1, (SV *) newpad);	175	av_store (newpadlist, 1, (SV *)newpad);
169
170	av = newAV (); /* will be @_ */
171	av_extend (av, 0);
172	av_store (newpad, 0, (SV *) av);
173	AvFLAGS (av) = AVf_REIFY;
174
175	for (ix = fpad; ix > 0; ix--)
176	{
177	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
178
179	if (namesv && namesv != &PL_sv_undef)
180	{
181	char *name = SvPVX (namesv); /* XXX */
182
183	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
184	{ /* lexical from outside? */
185	npad[ix] = SvREFCNT_inc (ppad[ix]);
186	}
187	else
188	{ /* our own lexical */
189	SV *sv;
190	if (*name == '&')
191	sv = SvREFCNT_inc (ppad[ix]);
192	else if (*name == '@')
193	sv = (SV *) newAV ();
194	else if (*name == '%')
195	sv = (SV *) newHV ();
196	else
197	sv = NEWSV (0, 0);
198
199	#ifdef SvPADBUSY
200	if (!SvPADBUSY (sv))
201	#endif
202	SvPADMY_on (sv);
203
204	npad[ix] = sv;
205	}
206	}
207	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
208	{
209	npad[ix] = SvREFCNT_inc (ppad[ix]);
210	}
211	else
212	{
213	SV *sv = NEWSV (0, 0);
214	SvPADTMP_on (sv);
215	npad[ix] = sv;
216	}
217	}
218
219	#if 0 /* return -ENOTUNDERSTOOD */
220	/* Now that vars are all in place, clone nested closures. */
221
222	for (ix = fpad; ix > 0; ix--) {
223	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224	if (namesv
225	&& namesv != &PL_sv_undef
226	&& !(SvFLAGS(namesv) & SVf_FAKE)
227	&& *SvPVX(namesv) == '&'
228	&& CvCLONE(ppad[ix]))
229	{
230	CV *kid = cv_clone((CV*)ppad[ix]);
231	SvREFCNT_dec(ppad[ix]);
232	CvCLONE_on(kid);
233	SvPADMY_on(kid);
234	npad[ix] = (SV*)kid;
235	}
236	}
237	#endif
238		176
239	return newpadlist;	177	return newpadlist;
240	}	178	}
241		179
242	STATIC void	180	static void
243	free_padlist (pTHX_ AV *padlist)	181	free_padlist (pTHX_ AV *padlist)
244	{	182	{
245	/* may be during global destruction */	183	/* may be during global destruction */
246	if (SvREFCNT (padlist))	184	if (SvREFCNT (padlist))
247	{	185	{
…		…
261		199
262	SvREFCNT_dec ((SV*)padlist);	200	SvREFCNT_dec ((SV*)padlist);
263	}	201	}
264	}	202	}
265		203
266	STATIC int	204	static int
267	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	205	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268	{	206	{
269	AV *padlist;	207	AV *padlist;
270	AV *av = (AV *)mg->mg_obj;	208	AV *av = (AV *)mg->mg_obj;
271		209
272	/* casting is fun. */	210	/* casting is fun. */
273	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	211	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274	free_padlist (aTHX_ padlist);	212	free_padlist (aTHX_ padlist);
275		213
276	SvREFCNT_dec (av);	214	SvREFCNT_dec (av);
		215
		216	return 0;
277	}	217	}
278		218
279	#define PERL_MAGIC_coro PERL_MAGIC_ext	219	#define PERL_MAGIC_coro PERL_MAGIC_ext
280		220
281	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
282		222
283	/* the next two functions merely cache the padlists */	223	/* the next two functions merely cache the padlists */
284	STATIC void	224	static void
285	get_padlist (pTHX_ CV *cv)	225	get_padlist (pTHX_ CV *cv)
286	{	226	{
287	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
288		228
289	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
290	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
291	else	231	else
		232	{
		233	#if 0
		234	/* this is probably cleaner, but also slower? */
		235	CV *cp = Perl_cv_clone (aTHX_ cv);
		236	CvPADLIST (cv) = CvPADLIST (cp);
		237	CvPADLIST (cp) = 0;
		238	SvREFCNT_dec (cp);
		239	#else
292	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		241	#endif
		242	}
293	}	243	}
294		244
295	STATIC void	245	static void
296	put_padlist (pTHX_ CV *cv)	246	put_padlist (pTHX_ CV *cv)
297	{	247	{
298	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
299		249
300	if (!mg)	250	if (!mg)
…		…
327	PL_mainstack = c->mainstack;	277	PL_mainstack = c->mainstack;
328	PL_stack_sp = c->stack_sp;	278	PL_stack_sp = c->stack_sp;
329	PL_op = c->op;	279	PL_op = c->op;
330	PL_curpad = c->curpad;	280	PL_curpad = c->curpad;
331	PL_comppad = c->comppad;	281	PL_comppad = c->comppad;
		282	PL_compcv = c->compcv;
332	PL_stack_base = c->stack_base;	283	PL_stack_base = c->stack_base;
333	PL_stack_max = c->stack_max;	284	PL_stack_max = c->stack_max;
334	PL_tmps_stack = c->tmps_stack;	285	PL_tmps_stack = c->tmps_stack;
335	PL_tmps_floor = c->tmps_floor;	286	PL_tmps_floor = c->tmps_floor;
336	PL_tmps_ix = c->tmps_ix;	287	PL_tmps_ix = c->tmps_ix;
…		…
342	PL_scopestack_ix = c->scopestack_ix;	293	PL_scopestack_ix = c->scopestack_ix;
343	PL_scopestack_max = c->scopestack_max;	294	PL_scopestack_max = c->scopestack_max;
344	PL_savestack = c->savestack;	295	PL_savestack = c->savestack;
345	PL_savestack_ix = c->savestack_ix;	296	PL_savestack_ix = c->savestack_ix;
346	PL_savestack_max = c->savestack_max;	297	PL_savestack_max = c->savestack_max;
		298	#if PERL_VERSION < 9
347	PL_retstack = c->retstack;	299	PL_retstack = c->retstack;
348	PL_retstack_ix = c->retstack_ix;	300	PL_retstack_ix = c->retstack_ix;
349	PL_retstack_max = c->retstack_max;	301	PL_retstack_max = c->retstack_max;
		302	#endif
		303	PL_curpm = c->curpm;
350	PL_curcop = c->curcop;	304	PL_curcop = c->curcop;
351	PL_top_env = c->top_env;
352		305
353	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
354	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
355	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
356		309
…		…
413	}	366	}
414		367
415	PUSHs ((SV *)CvPADLIST(cv));	368	PUSHs ((SV *)CvPADLIST(cv));
416	PUSHs ((SV *)cv);	369	PUSHs ((SV *)cv);
417		370
418	get_padlist (aTHX_ cv); /* this is a monster */	371	get_padlist (aTHX_ cv);
419	}	372	}
420	}	373	}
421	#ifdef CXt_FORMAT	374	#ifdef CXt_FORMAT
422	else if (CxTYPE(cx) == CXt_FORMAT)	375	else if (CxTYPE(cx) == CXt_FORMAT)
423	{	376	{
…		…
451	c->mainstack = PL_mainstack;	404	c->mainstack = PL_mainstack;
452	c->stack_sp = PL_stack_sp;	405	c->stack_sp = PL_stack_sp;
453	c->op = PL_op;	406	c->op = PL_op;
454	c->curpad = PL_curpad;	407	c->curpad = PL_curpad;
455	c->comppad = PL_comppad;	408	c->comppad = PL_comppad;
		409	c->compcv = PL_compcv;
456	c->stack_base = PL_stack_base;	410	c->stack_base = PL_stack_base;
457	c->stack_max = PL_stack_max;	411	c->stack_max = PL_stack_max;
458	c->tmps_stack = PL_tmps_stack;	412	c->tmps_stack = PL_tmps_stack;
459	c->tmps_floor = PL_tmps_floor;	413	c->tmps_floor = PL_tmps_floor;
460	c->tmps_ix = PL_tmps_ix;	414	c->tmps_ix = PL_tmps_ix;
…		…
466	c->scopestack_ix = PL_scopestack_ix;	420	c->scopestack_ix = PL_scopestack_ix;
467	c->scopestack_max = PL_scopestack_max;	421	c->scopestack_max = PL_scopestack_max;
468	c->savestack = PL_savestack;	422	c->savestack = PL_savestack;
469	c->savestack_ix = PL_savestack_ix;	423	c->savestack_ix = PL_savestack_ix;
470	c->savestack_max = PL_savestack_max;	424	c->savestack_max = PL_savestack_max;
		425	#if PERL_VERSION < 9
471	c->retstack = PL_retstack;	426	c->retstack = PL_retstack;
472	c->retstack_ix = PL_retstack_ix;	427	c->retstack_ix = PL_retstack_ix;
473	c->retstack_max = PL_retstack_max;	428	c->retstack_max = PL_retstack_max;
		429	#endif
		430	c->curpm = PL_curpm;
474	c->curcop = PL_curcop;	431	c->curcop = PL_curcop;
475	c->top_env = PL_top_env;
476	}	432	}
477		433
478	/*	434	/*
479	* allocate various perl stacks. This is an exact copy	435	* allocate various perl stacks. This is an exact copy
480	* of perl.c:init_stacks, except that it uses less memory	436	* of perl.c:init_stacks, except that it uses less memory
481	* on the (sometimes correct) assumption that coroutines do	437	* on the (sometimes correct) assumption that coroutines do
482	* not usually need a lot of stackspace.	438	* not usually need a lot of stackspace.
483	*/	439	*/
484	STATIC void	440	static void
485	coro_init_stacks (pTHX)	441	coro_init_stacks (pTHX)
486	{	442	{
487	LOCK;	443	LOCK;
488		444
489	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	445	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
…		…
514		470
515	New(54,PL_savestack,96,ANY);	471	New(54,PL_savestack,96,ANY);
516	PL_savestack_ix = 0;	472	PL_savestack_ix = 0;
517	PL_savestack_max = 96;	473	PL_savestack_max = 96;
518		474
		475	#if PERL_VERSION < 9
519	New(54,PL_retstack,8,OP*);	476	New(54,PL_retstack,8,OP*);
520	PL_retstack_ix = 0;	477	PL_retstack_ix = 0;
521	PL_retstack_max = 8;	478	PL_retstack_max = 8;
		479	#endif
522		480
523	UNLOCK;	481	UNLOCK;
524	}	482	}
525		483
526	/*	484	/*
527	* destroy the stacks, the callchain etc...	485	* destroy the stacks, the callchain etc...
528	*/	486	*/
529	STATIC void	487	static void
530	destroy_stacks(pTHX)	488	destroy_stacks(pTHX)
531	{	489	{
532	if (!IN_DESTRUCT)	490	if (!IN_DESTRUCT)
533	{	491	{
534	/* is this ugly, I ask? */	492	/* is this ugly, I ask? */
…		…
566		524
567	Safefree (PL_tmps_stack);	525	Safefree (PL_tmps_stack);
568	Safefree (PL_markstack);	526	Safefree (PL_markstack);
569	Safefree (PL_scopestack);	527	Safefree (PL_scopestack);
570	Safefree (PL_savestack);	528	Safefree (PL_savestack);
		529	#if PERL_VERSION < 9
571	Safefree (PL_retstack);	530	Safefree (PL_retstack);
572	}
573
574	static void
575	allocate_stack (Coro__State ctx, int alloc)
576	{
577	coro_stack *stack;
578
579	New (0, stack, 1, coro_stack);
580
581	stack->refcnt = 1;
582	stack->usecnt = 1;
583	stack->gencnt = ctx->gencnt = 0;
584
585	if (alloc)
586	{
587	#if HAVE_MMAP
588	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
589	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
590	if (stack->sptr == (void *)-1)
591	#endif	531	#endif
592	{
593	/*FIXME*//*D*//* reasonable stack size! */
594	stack->ssize = - (8192 * sizeof (long));
595	New (0, stack->sptr, 8192, long);
596	}
597	}
598	else
599	stack->sptr = 0;
600
601	ctx->stack = stack;
602	}	532	}
603		533
604	static void	534	static void
605	deallocate_stack (Coro__State ctx)	535	setup_coro (struct coro *coro)
606	{
607	coro_stack *stack = ctx->stack;
608
609	ctx->stack = 0;
610
611	if (stack)
612	{
613	if (!--stack->refcnt)
614	{
615	#ifdef HAVE_MMAP
616	if (stack->ssize > 0 && stack->sptr)
617	munmap (stack->sptr, stack->ssize);
618	else
619	#endif
620	Safefree (stack->sptr);
621
622	Safefree (stack);
623	}
624	else if (ctx->gencnt == stack->gencnt)
625	--stack->usecnt;
626	}
627	}
628
629	static void
630	setup_coro (void *arg)
631	{	536	{
632	/*	537	/*
633	* emulate part of the perl startup here.	538	* emulate part of the perl startup here.
634	*/	539	*/
635	dTHX;	540	dTHX;
636	dSP;	541	dSP;
637	Coro__State ctx = (Coro__State)arg;	542	UNOP myop;
638	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);	543	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
639		544
640	coro_init_stacks (aTHX);	545	coro_init_stacks (aTHX);
641	/*PL_curcop = 0;*/	546	/*PL_curcop = 0;*/
642	/*PL_in_eval = PL_in_eval;*/ /* inherit */	547	/*PL_in_eval = PL_in_eval;*/ /* inherit */
643	SvREFCNT_dec (GvAV (PL_defgv));	548	SvREFCNT_dec (GvAV (PL_defgv));
644	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	549	GvAV (PL_defgv) = coro->args; coro->args = 0;
645		550
646	SPAGAIN;	551	SPAGAIN;
647		552
648	if (ctx->stack)	553	Zero (&myop, 1, UNOP);
		554	myop.op_next = Nullop;
		555	myop.op_flags = OPf_WANT_VOID;
		556
		557	PL_op = (OP *)&myop;
		558
		559	PUSHMARK(SP);
		560	XPUSHs (sub_init);
		561	PUTBACK;
		562	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		563	SPAGAIN;
		564
		565	ENTER; /* necessary e.g. for dounwind */
		566	}
		567
		568	static void
		569	free_coro_mortal ()
		570	{
		571	if (coro_mortal)
649	{	572	{
650	ctx->cursp = 0;	573	dTHX;
651		574
652	PUSHMARK(SP);	575	SvREFCNT_dec (coro_mortal);
653	PUTBACK;	576	coro_mortal = 0;
654	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
655
656	if (SvTRUE (ERRSV))
657	croak (NULL);
658	else
659	croak ("FATAL: CCTXT coroutine returned!");
660	}	577	}
661	else
662	{
663	UNOP myop;
664
665	PL_op = (OP *)&myop;
666
667	Zero(&myop, 1, UNOP);
668	myop.op_next = Nullop;
669	myop.op_flags = OPf_WANT_VOID;
670
671	PUSHMARK(SP);
672	XPUSHs (sub_init);
673	/*
674	* the next line is slightly wrong, as PL_op->op_next
675	* is actually being executed so we skip the first op.
676	* that doesn't matter, though, since it is only
677	* pp_nextstate and we never return...
678	* ah yes, and I don't care anyways ;)
679	*/
680	PUTBACK;
681	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
682	SPAGAIN;
683
684	ENTER; /* necessary e.g. for dounwind */
685	}
686	}	578	}
687		579
688	static void	580	static void
689	continue_coro (void *arg)	581	coro_run (void *arg)
690	{	582	{
691	/*	583	/*
692	* this is a _very_ stripped down perl interpreter ;)	584	* this is a _very_ stripped down perl interpreter ;)
693	*/	585	*/
694	dTHX;	586	dTHX;
695	Coro__State ctx = (Coro__State)arg;	587	int ret;
696	JMPENV coro_start_env;
697		588
		589	UNLOCK;
		590
698	PL_top_env = &ctx->start_env;	591	PL_top_env = &PL_start_env;
699		592
700	ctx->cursp = 0;	593	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
701	PL_op = PL_op->op_next;	594	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
702	CALLRUNOPS(aTHX);
703		595
		596	/* continue at cctx_init, without entersub */
		597	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
		598
		599	/* somebody will hit me for both perl_run and PL_restartop */
		600	ret = perl_run (aTHX_ PERL_GET_CONTEXT);
		601	printf ("ret %d\n", ret);//D
		602
		603	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
704	abort ();	604	abort ();
705	}	605	}
706		606
707	STATIC void	607	static coro_stack *
		608	stack_new ()
		609	{
		610	coro_stack *stack;
		611
		612	New (0, stack, 1, coro_stack);
		613
		614	#if HAVE_MMAP
		615
		616	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		617	/* mmap suppsedly does allocate-on-write for us */
		618	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		619
		620	if (stack->sptr == (void *)-1)
		621	{
		622	perror ("FATAL: unable to mmap stack for coroutine");
		623	_exit (EXIT_FAILURE);
		624	}
		625
		626	# if STACKGUARD
		627	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		628	# endif
		629
		630	#else
		631
		632	stack->ssize = STACKSIZE * (long)sizeof (long);
		633	New (0, stack->sptr, STACKSIZE, long);
		634
		635	if (!stack->sptr)
		636	{
		637	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		638	_exit (EXIT_FAILURE);
		639	}
		640
		641	#endif
		642
		643	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		644
		645	return stack;
		646	}
		647
		648	static void
		649	stack_free (coro_stack *stack)
		650	{
		651	if (!stack)
		652	return;
		653
		654	#if HAVE_MMAP
		655	munmap (stack->sptr, stack->ssize);
		656	#else
		657	Safefree (stack->sptr);
		658	#endif
		659
		660	Safefree (stack);
		661	}
		662
		663	static coro_stack *stack_first;
		664
		665	static coro_stack *
		666	stack_get ()
		667	{
		668	coro_stack *stack;
		669
		670	if (stack_first)
		671	{
		672	stack = stack_first;
		673	stack_first = stack->next;
		674	}
		675	else
		676	{
		677	stack = stack_new ();
		678	PL_op = PL_op->op_next;
		679	}
		680
		681	return stack;
		682	}
		683
		684	static void
		685	stack_put (coro_stack *stack)
		686	{
		687	stack->next = stack_first;
		688	stack_first = stack;
		689	}
		690
		691	/* never call directly, always through the coro_state_transfer global variable */
		692	static void
708	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	693	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
709	{	694	{
710	dSTACKLEVEL;	695	dSTACKLEVEL;
711		696
		697	/* sometimes transfer is only called to set idle_sp */
		698	if (flags == TRANSFER_SET_STACKLEVEL)
		699	((coro_stack *)prev)->idle_sp = STACKLEVEL;
712	if (prev != next)	700	else if (prev != next)
713	{	701	{
		702	coro_stack *prev__stack;
		703
		704	LOCK;
		705
714	if (next->mainstack)	706	if (next->mainstack)
715	{	707	{
716	LOCK;	708	/* coroutine already started */
717	SAVE (prev, flags);	709	SAVE (prev, flags);
718	LOAD (next);	710	LOAD (next);
719	UNLOCK;
720
721	/* mark this state as in-use */
722	next->mainstack = 0;
723	next->tmps_ix = -2;
724
725	/* stacklevel changed? if yes, grab the stack for us! */
726	if (flags & TRANSFER_SAVE_CCTXT)
727	{
728	if (!prev->stack)
729	allocate_stack (prev, 0);
730	else if (prev->cursp != stacklevel
731	&& prev->stack->usecnt > 1)
732	{
733	prev->gencnt = ++prev->stack->gencnt;
734	prev->stack->usecnt = 1;
735	}
736
737	/* has our stack been invalidated? */
738	if (next->stack && next->stack->gencnt != next->gencnt)
739	{
740	deallocate_stack (next);
741	allocate_stack (next, 1);
742	coro_create (&(next->stack->cctx),
743	continue_coro, (void *)next,
744	next->stack->sptr, labs (next->stack->ssize));
745	}
746
747	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
748	prev->cursp = stacklevel;
749	/* don't add any code here */
750	}
751	else
752	next->cursp = stacklevel;
753	}	711	}
754	else if (next->tmps_ix == -2)
755	croak ("tried to transfer to running coroutine");
756	else	712	else
757	{	713	{
758	LOCK;	714	/* need to start coroutine */
759	SAVE (prev, -1); /* first get rid of the old state */	715	/* first get rid of the old state */
760	UNLOCK;	716	SAVE (prev, -1);
761		717	/* setup coroutine call */
762	if (flags & TRANSFER_SAVE_CCTXT)
763	{
764	if (!prev->stack)
765	allocate_stack (prev, 0);
766
767	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
768	{
769	PL_top_env = &next->start_env;
770
771	setup_coro (next);
772	next->cursp = stacklevel;
773
774	prev->stack->refcnt++;
775	prev->stack->usecnt++;
776	next->stack = prev->stack;
777	next->gencnt = prev->gencnt;
778	}
779	else
780	{
781	assert (!next->stack);
782	allocate_stack (next, 1);
783	coro_create (&(next->stack->cctx),
784	setup_coro, (void *)next,
785	next->stack->sptr, labs (next->stack->ssize));
786	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
787	prev->cursp = stacklevel;
788	/* don't add any code here */
789	}
790	}
791	else
792	{
793	setup_coro (next);	718	setup_coro (next);
794	next->cursp = stacklevel;	719	/* need a stack */
795	}	720	next->stack = 0;
796	}	721	}
		722
		723	if (!prev->stack)
		724	/* create a new empty context */
		725	Newz (0, prev->stack, 1, coro_stack);
		726
		727	prev__stack = prev->stack;
		728
		729	/* possibly "free" the stack */
		730	if (prev__stack->idle_sp == STACKLEVEL)
		731	{
		732	stack_put (prev__stack);
		733	prev->stack = 0;
		734	}
		735
		736	if (!next->stack)
		737	next->stack = stack_get ();
		738
		739	if (prev__stack != next->stack)
		740	{
		741	prev__stack->top_env = PL_top_env;
		742	PL_top_env = next->stack->top_env;
		743	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		744	}
		745
		746	free_coro_mortal ();
		747
		748	UNLOCK;
797	}	749	}
		750	}
798		751
799	LOCK;	752	/* use this function pointer to call the above function */
800	if (coro_mortal)	753	/* this is done to increase chances of the compiler not inlining the call */
		754	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
		755	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
		756
		757	struct transfer_args
		758	{
		759	struct coro *prev, *next;
		760	int flags;
		761	};
		762
		763	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
		764
		765	static void
		766	coro_state_destroy (struct coro *coro)
		767	{
		768	if (coro->refcnt--)
		769	return;
		770
		771	if (coro->mainstack && coro->mainstack != main_mainstack)
801	{	772	{
802	SvREFCNT_dec (coro_mortal);	773	struct coro temp;
		774
		775	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
		776	LOAD (aTHX_ coro);
		777
		778	destroy_stacks (aTHX);
		779
		780	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		781
803	coro_mortal = 0;	782	coro->mainstack = 0;
804	}	783	}
805	UNLOCK;
806	}
807		784
808	#define SV_CORO(sv,func) \	785	stack_free (coro->stack);
809	do { \	786	SvREFCNT_dec (coro->args);
810	if (SvROK (sv)) \	787	Safefree (coro);
811	sv = SvRV (sv); \	788	}
812	\
813	if (SvTYPE (sv) == SVt_PVHV) \
814	{ \
815	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
816	\
817	if (!he) \
818	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
819	\
820	(sv) = SvRV (HeVAL(he)); \
821	} \
822	\
823	/* must also be changed inside Coro::Cont::yield */ \
824	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
825	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
826	\
827	} while(0)
828		789
829	#define SvSTATE(sv) (struct coro *)SvIV (sv)
830
831	static void	790	static int
		791	coro_state_clear (SV *sv, MAGIC *mg)
		792	{
		793	struct coro *coro = (struct coro *)mg->mg_ptr;
		794	mg->mg_ptr = 0;
		795
		796	coro_state_destroy (coro);
		797
		798	return 0;
		799	}
		800
		801	static int
		802	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)
		803	{
		804	struct coro *coro = (struct coro *)mg->mg_ptr;
		805
		806	++coro->refcnt;
		807
		808	return 0;
		809	}
		810
		811	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
		812
		813	static struct coro *
		814	SvSTATE (SV *coro)
		815	{
		816	HV *stash;
		817	MAGIC *mg;
		818
		819	if (SvROK (coro))
		820	coro = SvRV (coro);
		821
		822	stash = SvSTASH (coro);
		823	if (stash != coro_stash && stash != coro_state_stash)
		824	{
		825	/* very slow, but rare, check */
		826	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		827	croak ("Coro::State object required");
		828	}
		829
		830	mg = SvMAGIC (coro);
		831	assert (mg->mg_type == PERL_MAGIC_ext);
		832	return (struct coro *)mg->mg_ptr;
		833	}
		834
		835	static void
		836	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)
		837	{
		838	ta->prev = SvSTATE (prev);
		839	ta->next = SvSTATE (next);
		840	ta->flags = flags;
		841	}
		842
		843	static void
832	api_transfer(pTHX_ SV *prev, SV *next, int flags)	844	api_transfer (SV *prev, SV *next, int flags)
833	{	845	{
834	SV_CORO (prev, "Coro::transfer");	846	dTHX;
835	SV_CORO (next, "Coro::transfer");	847	struct transfer_args ta;
836		848
837	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	849	prepare_transfer (aTHX_ &ta, prev, next, flags);
		850	TRANSFER (ta);
838	}	851	}
839		852
840	/** Coro ********************************************************************/	853	/** Coro ********************************************************************/
841		854
842	#define PRIO_MAX 3	855	#define PRIO_MAX 3
…		…
846	#define PRIO_IDLE -3	859	#define PRIO_IDLE -3
847	#define PRIO_MIN -4	860	#define PRIO_MIN -4
848		861
849	/* for Coro.pm */	862	/* for Coro.pm */
850	static GV *coro_current, *coro_idle;	863	static GV *coro_current, *coro_idle;
851	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	864	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
852	static int coro_nready;	865	static int coro_nready;
853		866
854	static void	867	static void
855	coro_enq (pTHX_ SV *sv)	868	coro_enq (pTHX_ SV *sv)
856	{	869	{
		870	int prio;
		871
857	if (SvTYPE (sv) == SVt_PVHV)	872	if (SvTYPE (sv) != SVt_PVHV)
858	{
859	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
860	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
861
862	prio = prio > PRIO_MAX ? PRIO_MAX
863	: prio < PRIO_MIN ? PRIO_MIN
864	: prio;
865
866	av_push (coro_ready [prio - PRIO_MIN], sv);
867	coro_nready++;
868
869	return;
870	}
871
872	croak ("Coro::ready tried to enqueue something that is not a coroutine");	873	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		874
		875	prio = SvSTATE (sv)->prio;
		876
		877	av_push (coro_ready [prio - PRIO_MIN], sv);
		878	coro_nready++;
873	}	879	}
874		880
875	static SV *	881	static SV *
876	coro_deq (pTHX_ int min_prio)	882	coro_deq (pTHX_ int min_prio)
877	{	883	{
…		…
880	min_prio -= PRIO_MIN;	886	min_prio -= PRIO_MIN;
881	if (min_prio < 0)	887	if (min_prio < 0)
882	min_prio = 0;	888	min_prio = 0;
883		889
884	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	890	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
885	if (av_len (coro_ready[prio]) >= 0)	891	if (AvFILLp (coro_ready [prio]) >= 0)
886	{	892	{
887	coro_nready--;	893	coro_nready--;
888	return av_shift (coro_ready[prio]);	894	return av_shift (coro_ready [prio]);
889	}	895	}
890		896
891	return 0;	897	return 0;
892	}	898	}
893		899
…		…
903	coro_enq (aTHX_ SvREFCNT_inc (coro));	909	coro_enq (aTHX_ SvREFCNT_inc (coro));
904	UNLOCK;	910	UNLOCK;
905	}	911	}
906		912
907	static void	913	static void
908	api_schedule (void)	914	prepare_schedule (aTHX_ struct transfer_args *ta)
909	{	915	{
910	dTHX;
911
912	SV *prev, *next;	916	SV *current, *prev, *next;
913		917
914	LOCK;	918	LOCK;
915		919
916	prev = SvRV (GvSV (coro_current));	920	current = GvSV (coro_current);
		921
		922	for (;;)
		923	{
		924	LOCK;
		925
917	next = coro_deq (aTHX_ PRIO_MIN);	926	next = coro_deq (aTHX_ PRIO_MIN);
918		927
919	if (!next)	928	if (next)
920	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));	929	break;
		930
		931	UNLOCK;
		932
		933	{
		934	dSP;
		935
		936	ENTER;
		937	SAVETMPS;
		938
		939	PUSHMARK (SP);
		940	PUTBACK;
		941	call_sv (GvSV (coro_idle), G_DISCARD);
		942
		943	FREETMPS;
		944	LEAVE;
		945	}
		946	}
		947
		948	prev = SvRV (current);
		949	SvRV (current) = next;
921		950
922	/* free this only after the transfer */	951	/* free this only after the transfer */
		952	free_coro_mortal ();
923	coro_mortal = prev;	953	coro_mortal = prev;
924	SV_CORO (prev, "Coro::schedule");
925		954
926	SvRV (GvSV (coro_current)) = next;	955	ta->prev = SvSTATE (prev);
927		956	ta->next = SvSTATE (next);
928	SV_CORO (next, "Coro::schedule");	957	ta->flags = TRANSFER_SAVE_ALL;
929		958
930	UNLOCK;	959	UNLOCK;
931
932	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
933	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
934	}	960	}
935		961
936	static void	962	static void
937	api_cede (void)	963	prepare_cede (aTHX_ struct transfer_args *ta)
938	{	964	{
939	dTHX;
940
941	LOCK;	965	LOCK;
942	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	966	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
943	UNLOCK;	967	UNLOCK;
944		968
		969	prepare_schedule (ta);
		970	}
		971
		972	static void
945	api_schedule ();	973	api_schedule (void)
		974	{
		975	dTHX;
		976	struct transfer_args ta;
		977
		978	prepare_schedule (&ta);
		979	TRANSFER (ta);
		980	}
		981
		982	static void
		983	api_cede (void)
		984	{
		985	dTHX;
		986	struct transfer_args ta;
		987
		988	prepare_cede (&ta);
		989	TRANSFER (ta);
946	}	990	}
947		991
948	MODULE = Coro::State PACKAGE = Coro::State	992	MODULE = Coro::State PACKAGE = Coro::State
949		993
950	PROTOTYPES: ENABLE	994	PROTOTYPES: DISABLE
951		995
952	BOOT:	996	BOOT:
953	{ /* {} necessary for stoopid perl-5.6.x */	997	{
954	#ifdef USE_ITHREADS	998	#ifdef USE_ITHREADS
955	MUTEX_INIT (&coro_mutex);	999	MUTEX_INIT (&coro_mutex);
956	#endif	1000	#endif
		1001	BOOT_PAGESIZE;
957		1002
958	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
959	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
960	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1003	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
961		1004
962	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1005	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
963	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1006	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
964	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1007	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
965	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
966		1008
967	main_mainstack = PL_mainstack;	1009	main_mainstack = PL_mainstack;
968		1010
969	coroapi.ver = CORO_API_VERSION;	1011	coroapi.ver = CORO_API_VERSION;
970	coroapi.transfer = api_transfer;	1012	coroapi.transfer = api_transfer;
971	}
972		1013
973	Coro::State	1014	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
974	_newprocess(args)	1015	}
975	SV * args	1016
976	PROTOTYPE: $	1017	SV *
		1018	new (char *klass, ...)
977	CODE:	1019	CODE:
978	Coro__State coro;	1020	{
		1021	struct coro *coro;
		1022	HV *hv;
		1023	int i;
979		1024
980	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
981	croak ("Coro::State::_newprocess expects an arrayref");
982
983	Newz (0, coro, 1, struct coro);	1025	Newz (0, coro, 1, struct coro);
		1026	coro->args = newAV ();
984		1027
985	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1028	hv = newHV ();
		1029	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1030	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1031
		1032	for (i = 1; i < items; i++)
		1033	av_push (coro->args, newSVsv (ST (i)));
		1034
986	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1035	/*coro->mainstack = 0; *//*actual work is done inside transfer */
987	/*coro->stack = 0;*/	1036	/*coro->stack = 0;*/
988		1037	}
989	/* same as JMPENV_BOOTSTRAP */
990	/* we might be able to recycle start_env, but safe is safe */
991	/*Zero(&coro->start_env, 1, JMPENV);*/
992	coro->start_env.je_ret = -1;
993	coro->start_env.je_mustcatch = TRUE;
994
995	RETVAL = coro;
996	OUTPUT:	1038	OUTPUT:
997	RETVAL	1039	RETVAL
998		1040
999	void	1041	void
1000	transfer(prev, next, flags)	1042	_set_stacklevel (...)
1001	SV *prev	1043	ALIAS:
1002	SV *next	1044	Coro::State::transfer = 1
1003	int flags	1045	Coro::schedule = 2
1004	PROTOTYPE: @	1046	Coro::cede = 3
		1047	Coro::Cont::yield = 4
1005	CODE:	1048	CODE:
1006	PUTBACK;	1049	{
1007	SV_CORO (next, "Coro::transfer");	1050	struct transfer_args ta;
1008	SV_CORO (prev, "Coro::transfer");	1051
1009	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1052	switch (ix)
1010	SPAGAIN;	1053	{
		1054	case 0:
		1055	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
		1056	ta.next = 0;
		1057	ta.flags = TRANSFER_SET_STACKLEVEL;
		1058	break;
		1059
		1060	case 1:
		1061	if (items != 3)
		1062	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1063
		1064	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1065	break;
		1066
		1067	case 2:
		1068	prepare_schedule (&ta);
		1069	break;
		1070
		1071	case 3:
		1072	prepare_cede (&ta);
		1073	break;
		1074
		1075	case 4:
		1076	{
		1077	SV *yieldstack;
		1078	SV *sv;
		1079	AV *defav = GvAV (PL_defgv);
		1080
		1081	yieldstack = *hv_fetch (
		1082	(HV *)SvRV (GvSV (coro_current)),
		1083	"yieldstack", sizeof ("yieldstack") - 1,
		1084	0
		1085	);
		1086
		1087	/* set up @_ -- ugly */
		1088	av_clear (defav);
		1089	av_fill (defav, items - 1);
		1090	while (items--)
		1091	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1092
		1093	sv = av_pop ((AV *)SvRV (yieldstack));
		1094	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1095	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1096	ta.flags = 0;
		1097	SvREFCNT_dec (sv);
		1098	}
		1099	break;
		1100
		1101	}
		1102
		1103	TRANSFER (ta);
		1104	}
1011		1105
1012	void	1106	void
1013	DESTROY(coro)	1107	_clone_state_from (SV *dst, SV *src)
1014	Coro::State coro	1108	CODE:
1015	CODE:	1109	{
		1110	struct coro *coro_src = SvSTATE (src);
1016		1111
1017	if (coro->mainstack && coro->mainstack != main_mainstack)	1112	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1018	{
1019	struct coro temp;
1020		1113
1021	PUTBACK;	1114	++coro_src->refcnt;
1022	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1115	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1023	LOAD (aTHX_ coro);	1116	}
1024	SPAGAIN;
1025
1026	destroy_stacks (aTHX);
1027
1028	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1029	SPAGAIN;
1030
1031	coro->mainstack = 0;
1032	}
1033
1034	deallocate_stack (coro);
1035	SvREFCNT_dec (coro->args);
1036	Safefree (coro);
1037		1117
1038	void	1118	void
		1119	_nonlocal_goto (IV nextop)
		1120	CODE:
		1121	/* uuh, somebody will kill me again for this */
		1122	PL_op->op_next = INT2PTR (OP *, nextop);
		1123
		1124	void
1039	_exit(code)	1125	_exit (code)
1040	int code	1126	int code
1041	PROTOTYPE: $	1127	PROTOTYPE: $
1042	CODE:	1128	CODE:
1043	_exit (code);	1129	_exit (code);
1044		1130
1045	MODULE = Coro::State PACKAGE = Coro::Cont
1046
1047	# this is slightly dirty (should expose a c-level api)
1048
1049	void
1050	yield(...)
1051	PROTOTYPE: @
1052	CODE:
1053	static SV *returnstk;
1054	SV *sv;
1055	AV *defav = GvAV (PL_defgv);
1056	struct coro *prev, *next;
1057
1058	if (!returnstk)
1059	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1060
1061	/* set up @_ -- ugly */
1062	av_clear (defav);
1063	av_fill (defav, items - 1);
1064	while (items--)
1065	av_store (defav, items, SvREFCNT_inc (ST(items)));
1066
1067	SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1068	sv = av_pop ((AV *)SvRV (returnstk));
1069	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1070	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1071	SvREFCNT_dec (sv);
1072
1073	transfer (aTHX_ prev, next, 0);
1074
1075	MODULE = Coro::State PACKAGE = Coro	1131	MODULE = Coro::State PACKAGE = Coro
1076		1132
1077	# this is slightly dirty (should expose a c-level api)
1078
1079	BOOT:	1133	BOOT:
1080	{	1134	{
1081	int i;	1135	int i;
		1136
1082	HV *stash = gv_stashpv ("Coro", TRUE);	1137	coro_stash = gv_stashpv ("Coro", TRUE);
1083		1138
1084	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1139	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1085	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1140	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1086	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1141	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1087	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1142	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1088	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1143	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1089	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1144	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1090		1145
1091	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1146	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1092	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1147	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1093		1148
1094	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1149	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1102	coroapi.ready = api_ready;	1157	coroapi.ready = api_ready;
1103	coroapi.nready = &coro_nready;	1158	coroapi.nready = &coro_nready;
1104	coroapi.current = coro_current;	1159	coroapi.current = coro_current;
1105		1160
1106	GCoroAPI = &coroapi;	1161	GCoroAPI = &coroapi;
1107	sv_setiv(sv, (IV)&coroapi);	1162	sv_setiv (sv, (IV)&coroapi);
1108	SvREADONLY_on(sv);	1163	SvREADONLY_on (sv);
1109	}	1164	}
1110	}	1165	}
1111		1166
1112	#if !PERL_MICRO	1167	int
		1168	prio (Coro::State coro, int newprio = 0)
		1169	ALIAS:
		1170	nice = 1
		1171	CODE:
		1172	{
		1173	RETVAL = coro->prio;
		1174
		1175	if (items > 1)
		1176	{
		1177	if (ix)
		1178	newprio += coro->prio;
		1179
		1180	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1181	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1182
		1183	coro->prio = newprio;
		1184	}
		1185	}
1113		1186
1114	void	1187	void
1115	ready(self)	1188	ready (SV *self)
1116	SV * self
1117	PROTOTYPE: $	1189	PROTOTYPE: $
1118	CODE:	1190	CODE:
1119	api_ready (self);	1191	api_ready (self);
1120		1192
1121	#endif
1122
1123	int	1193	int
1124	nready(...)	1194	nready (...)
1125	PROTOTYPE:	1195	PROTOTYPE:
1126	CODE:	1196	CODE:
1127	RETVAL = coro_nready;	1197	RETVAL = coro_nready;
1128	OUTPUT:	1198	OUTPUT:
1129	RETVAL	1199	RETVAL
1130		1200
		1201	MODULE = Coro::State PACKAGE = Coro::AIO
		1202
		1203	SV *
		1204	_get_state ()
		1205	CODE:
		1206	{
		1207	struct {
		1208	int errorno;
		1209	int laststype;
		1210	int laststatval;
		1211	Stat_t statcache;
		1212	} data;
		1213
		1214	data.errorno = errno;
		1215	data.laststype = PL_laststype;
		1216	data.laststatval = PL_laststatval;
		1217	data.statcache = PL_statcache;
		1218
		1219	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1220	}
		1221	OUTPUT:
		1222	RETVAL
		1223
1131	void	1224	void
1132	schedule(...)	1225	_set_state (char *data_)
1133	PROTOTYPE:	1226	PROTOTYPE: $
1134	CODE:	1227	CODE:
1135	api_schedule ();	1228	{
		1229	struct {
		1230	int errorno;
		1231	int laststype;
		1232	int laststatval;
		1233	Stat_t statcache;
		1234	} *data = (void *)data_;
1136		1235
1137	void	1236	errno = data->errorno;
1138	cede(...)	1237	PL_laststype = data->laststype;
1139	PROTOTYPE:	1238	PL_laststatval = data->laststatval;
1140	CODE:	1239	PL_statcache = data->statcache;
1141	api_cede ();	1240	}
1142

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