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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.77 by root, Tue Oct 31 23:55:33 2006 UTC vs.
Revision 1.105 by root, Mon Nov 27 02:01:33 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	#define PERL_VERSION_ATLEAST(a,b,c) \
		14	(PERL_REVISION > (a) \
		15	|| (PERL_REVISION == (a) \
		16	&& (PERL_VERSION > (b) \
		17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		18
		19	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	20	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	21	# define PL_ppaddr ppaddr
14	# endif	22	# endif
15	# ifndef call_sv	23	# ifndef call_sv
16	# define call_sv perl_call_sv	24	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	35	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	36	# define IS_PADCONST(v) 0
29	# endif	37	# endif
30	#endif	38	#endif
31		39
		40	#include <stdio.h>
32	#include <errno.h>	41	#include <errno.h>
		42
		43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		44	# undef STACKGUARD
		45	#endif
		46
		47	#ifndef STACKGUARD
		48	# define STACKGUARD 0
		49	#endif
33		50
34	#ifdef HAVE_MMAP	51	#ifdef HAVE_MMAP
35	# include <unistd.h>	52	# include <unistd.h>
36	# include <sys/mman.h>	53	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
…		…
39	# define MAP_ANONYMOUS MAP_ANON	56	# define MAP_ANONYMOUS MAP_ANON
40	# else	57	# else
41	# undef HAVE_MMAP	58	# undef HAVE_MMAP
42	# endif	59	# endif
43	# endif	60	# endif
		61	# include <limits.h>
		62	# ifndef PAGESIZE
		63	# define PAGESIZE pagesize
		64	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		65	static long pagesize;
		66	# else
		67	# define BOOT_PAGESIZE
44	#endif	68	# endif
45		69	#endif
46	#define SUB_INIT "Coro::State::initialize"
47	#define UCORO_STATE "_coro_state"
48		70
49	/* The next macro should declare a variable stacklevel that contains and approximation	71	/* 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	72	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	73	* and should be unique. */
		74	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	75	#define STACKLEVEL ((void *)&stacklevel)
53		76
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	77	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		78
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	79	#if __GNUC__ >= 3
		80	# define attribute(x) __attribute__(x)
		81	#else
		82	# define attribute(x)
		83	#endif
		84
		85	#define NOINLINE attribute ((noinline))
57		86
58	#include "CoroAPI.h"	87	#include "CoroAPI.h"
		88
		89	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59		90
60	#ifdef USE_ITHREADS	91	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	92	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	93	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	94	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
66	# define UNLOCK (void)0	97	# define UNLOCK (void)0
67	#endif	98	#endif
68		99
69	static struct CoroAPI coroapi;	100	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	101	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	102	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 */	103	static SV *coro_mortal; /* will be freed after next transfer */
75		104
76	/* this is actually not only the c stack but also c registers etc... */	105	/* this is a structure representing a c-level coroutine */
77	typedef struct {	106	typedef struct coro_stack {
78	int refcnt; /* pointer reference counter */	107	struct coro_stack *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		108
82	coro_context cctx;	109	/* the stack */
83
84	void *sptr;	110	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	111	long ssize; /* positive == mmap, otherwise malloc */
		112
		113	/* cpu state */
		114	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		115	JMPENV *top_env;
		116	coro_context cctx;
		117
		118	#if USE_VALGRIND
		119	int valgrind_id;
		120	#endif
86	} coro_stack;	121	} coro_stack;
87		122
		123	/* this is a structure representing a perl-level coroutine */
88	struct coro {	124	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	125	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;
91
92	/* the optional C context */
93	coro_stack *stack;	126	coro_stack *stack;
94	void *cursp;	127
		128	/* data associated with this coroutine (initial args) */
		129	AV *args;
95	int gencnt;	130	int refcnt;
96		131
97	/* optionally saved, might be zero */	132	/* optionally saved, might be zero */
98	AV *defav;	133	AV *defav;
99	SV *defsv;	134	SV *defsv;
100	SV *errsv;	135	SV *errsv;
…		…
130	OP **retstack;	165	OP **retstack;
131	I32 retstack_ix;	166	I32 retstack_ix;
132	I32 retstack_max;	167	I32 retstack_max;
133	PMOP *curpm;	168	PMOP *curpm;
134	COP *curcop;	169	COP *curcop;
135	JMPENV *top_env;
136		170
137	/* data associated with this coroutine (initial args) */	171	/* coro process data */
138	AV *args;	172	int prio;
139	};	173	};
140		174
141	typedef struct coro *Coro__State;	175	typedef struct coro *Coro__State;
142	typedef struct coro *Coro__State_or_hashref;	176	typedef struct coro *Coro__State_or_hashref;
143		177
144	static AV *	178	static AV *
145	coro_clone_padlist (pTHX_ CV *cv)	179	coro_clone_padlist (CV *cv)
146	{	180	{
147	AV *padlist = CvPADLIST (cv);	181	AV *padlist = CvPADLIST (cv);
148	AV *newpadlist, *newpad;	182	AV *newpadlist, *newpad;
149		183
150	newpadlist = newAV ();	184	newpadlist = newAV ();
151	AvREAL_off (newpadlist);	185	AvREAL_off (newpadlist);
		186	#if PERL_VERSION_ATLEAST (5,9,0)
		187	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		188	#else
152	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	189	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		190	#endif
153	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	191	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
154	--AvFILLp (padlist);	192	--AvFILLp (padlist);
155		193
156	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	194	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
157	av_store (newpadlist, 1, (SV *)newpad);	195	av_store (newpadlist, 1, (SV *)newpad);
158		196
159	return newpadlist;	197	return newpadlist;
160	}	198	}
161		199
162	static void	200	static void
163	free_padlist (pTHX_ AV *padlist)	201	free_padlist (AV *padlist)
164	{	202	{
165	/* may be during global destruction */	203	/* may be during global destruction */
166	if (SvREFCNT (padlist))	204	if (SvREFCNT (padlist))
167	{	205	{
168	I32 i = AvFILLp (padlist);	206	I32 i = AvFILLp (padlist);
…		…
189	AV *padlist;	227	AV *padlist;
190	AV *av = (AV *)mg->mg_obj;	228	AV *av = (AV *)mg->mg_obj;
191		229
192	/* casting is fun. */	230	/* casting is fun. */
193	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	231	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
194	free_padlist (aTHX_ padlist);	232	free_padlist (padlist);
195		233
196	SvREFCNT_dec (av);	234	SvREFCNT_dec (av);
197		235
198	return 0;	236	return 0;
199	}	237	}
…		…
202		240
203	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	241	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
204		242
205	/* the next two functions merely cache the padlists */	243	/* the next two functions merely cache the padlists */
206	static void	244	static void
207	get_padlist (pTHX_ CV *cv)	245	get_padlist (CV *cv)
208	{	246	{
209	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
210		248
211	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	249	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
212	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	250	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
213	else	251	else
214	{	252	{
215	#if 0	253	#if 0
216	/* this should work - but it doesn't :( */	254	/* this is probably cleaner, but also slower? */
217	CV *cp = Perl_cv_clone (aTHX_ cv);	255	CV *cp = Perl_cv_clone (cv);
218	CvPADLIST (cv) = CvPADLIST (cp);	256	CvPADLIST (cv) = CvPADLIST (cp);
219	CvPADLIST (cp) = 0;	257	CvPADLIST (cp) = 0;
220	SvREFCNT_dec (cp);	258	SvREFCNT_dec (cp);
221	#else	259	#else
222	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	260	CvPADLIST (cv) = coro_clone_padlist (cv);
223	#endif	261	#endif
224	}	262	}
225	}	263	}
226		264
227	static void	265	static void
228	put_padlist (pTHX_ CV *cv)	266	put_padlist (CV *cv)
229	{	267	{
230	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	268	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
231		269
232	if (!mg)	270	if (!mg)
233	{	271	{
…		…
241	}	279	}
242		280
243	#define SB do {	281	#define SB do {
244	#define SE } while (0)	282	#define SE } while (0)
245		283
246	#define LOAD(state) load_state(aTHX_ (state));	284	#define LOAD(state) load_state((state));
247	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	285	#define SAVE(state,flags) save_state((state),(flags));
248		286
249	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	287	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
250		288
251	static void	289	static void
252	load_state(pTHX_ Coro__State c)	290	load_state(Coro__State c)
253	{	291	{
254	PL_dowarn = c->dowarn;	292	PL_dowarn = c->dowarn;
255	PL_in_eval = c->in_eval;	293	PL_in_eval = c->in_eval;
256		294
257	PL_curstackinfo = c->curstackinfo;	295	PL_curstackinfo = c->curstackinfo;
…		…
275	PL_scopestack_ix = c->scopestack_ix;	313	PL_scopestack_ix = c->scopestack_ix;
276	PL_scopestack_max = c->scopestack_max;	314	PL_scopestack_max = c->scopestack_max;
277	PL_savestack = c->savestack;	315	PL_savestack = c->savestack;
278	PL_savestack_ix = c->savestack_ix;	316	PL_savestack_ix = c->savestack_ix;
279	PL_savestack_max = c->savestack_max;	317	PL_savestack_max = c->savestack_max;
280	#if PERL_VERSION < 9	318	#if !PERL_VERSION_ATLEAST (5,9,0)
281	PL_retstack = c->retstack;	319	PL_retstack = c->retstack;
282	PL_retstack_ix = c->retstack_ix;	320	PL_retstack_ix = c->retstack_ix;
283	PL_retstack_max = c->retstack_max;	321	PL_retstack_max = c->retstack_max;
284	#endif	322	#endif
285	PL_curpm = c->curpm;	323	PL_curpm = c->curpm;
286	PL_curcop = c->curcop;	324	PL_curcop = c->curcop;
287	PL_top_env = c->top_env;
288		325
289	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	326	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
290	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	327	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
291	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	328	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
292		329
…		…
299	{	336	{
300	AV *padlist = (AV *)POPs;	337	AV *padlist = (AV *)POPs;
301		338
302	if (padlist)	339	if (padlist)
303	{	340	{
304	put_padlist (aTHX_ cv); /* mark this padlist as available */	341	put_padlist (cv); /* mark this padlist as available */
305	CvPADLIST(cv) = padlist;	342	CvPADLIST(cv) = padlist;
306	}	343	}
307		344
308	++CvDEPTH(cv);	345	++CvDEPTH(cv);
309	}	346	}
…		…
311	PUTBACK;	348	PUTBACK;
312	}	349	}
313	}	350	}
314		351
315	static void	352	static void
316	save_state(pTHX_ Coro__State c, int flags)	353	save_state(Coro__State c, int flags)
317	{	354	{
318	{	355	{
319	dSP;	356	dSP;
320	I32 cxix = cxstack_ix;	357	I32 cxix = cxstack_ix;
321	PERL_CONTEXT *ccstk = cxstack;	358	PERL_CONTEXT *ccstk = cxstack;
…		…
349	}	386	}
350		387
351	PUSHs ((SV *)CvPADLIST(cv));	388	PUSHs ((SV *)CvPADLIST(cv));
352	PUSHs ((SV *)cv);	389	PUSHs ((SV *)cv);
353		390
354	get_padlist (aTHX_ cv);	391	get_padlist (cv);
355	}	392	}
356	}	393	}
357	#ifdef CXt_FORMAT	394	#ifdef CXt_FORMAT
358	else if (CxTYPE(cx) == CXt_FORMAT)	395	else if (CxTYPE(cx) == CXt_FORMAT)
359	{	396	{
…		…
403	c->scopestack_ix = PL_scopestack_ix;	440	c->scopestack_ix = PL_scopestack_ix;
404	c->scopestack_max = PL_scopestack_max;	441	c->scopestack_max = PL_scopestack_max;
405	c->savestack = PL_savestack;	442	c->savestack = PL_savestack;
406	c->savestack_ix = PL_savestack_ix;	443	c->savestack_ix = PL_savestack_ix;
407	c->savestack_max = PL_savestack_max;	444	c->savestack_max = PL_savestack_max;
408	#if PERL_VERSION < 9	445	#if !PERL_VERSION_ATLEAST (5,9,0)
409	c->retstack = PL_retstack;	446	c->retstack = PL_retstack;
410	c->retstack_ix = PL_retstack_ix;	447	c->retstack_ix = PL_retstack_ix;
411	c->retstack_max = PL_retstack_max;	448	c->retstack_max = PL_retstack_max;
412	#endif	449	#endif
413	c->curpm = PL_curpm;	450	c->curpm = PL_curpm;
414	c->curcop = PL_curcop;	451	c->curcop = PL_curcop;
415	c->top_env = PL_top_env;
416	}	452	}
417		453
418	/*	454	/*
419	* allocate various perl stacks. This is an exact copy	455	* allocate various perl stacks. This is an exact copy
420	* of perl.c:init_stacks, except that it uses less memory	456	* of perl.c:init_stacks, except that it uses less memory
421	* on the (sometimes correct) assumption that coroutines do	457	* on the (sometimes correct) assumption that coroutines do
422	* not usually need a lot of stackspace.	458	* not usually need a lot of stackspace.
423	*/	459	*/
424	static void	460	static void
425	coro_init_stacks (pTHX)	461	coro_init_stacks ()
426	{	462	{
427	LOCK;
428
429	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	463	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
430	PL_curstackinfo->si_type = PERLSI_MAIN;	464	PL_curstackinfo->si_type = PERLSI_MAIN;
431	PL_curstack = PL_curstackinfo->si_stack;	465	PL_curstack = PL_curstackinfo->si_stack;
432	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	466	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
433		467
…		…
454		488
455	New(54,PL_savestack,96,ANY);	489	New(54,PL_savestack,96,ANY);
456	PL_savestack_ix = 0;	490	PL_savestack_ix = 0;
457	PL_savestack_max = 96;	491	PL_savestack_max = 96;
458		492
459	#if PERL_VERSION < 9	493	#if !PERL_VERSION_ATLEAST (5,9,0)
460	New(54,PL_retstack,8,OP*);	494	New(54,PL_retstack,8,OP*);
461	PL_retstack_ix = 0;	495	PL_retstack_ix = 0;
462	PL_retstack_max = 8;	496	PL_retstack_max = 8;
463	#endif	497	#endif
464
465	UNLOCK;
466	}	498	}
467		499
468	/*	500	/*
469	* destroy the stacks, the callchain etc...	501	* destroy the stacks, the callchain etc...
470	*/	502	*/
471	static void	503	static void
472	destroy_stacks(pTHX)	504	coro_destroy_stacks()
473	{	505	{
474	if (!IN_DESTRUCT)	506	if (!IN_DESTRUCT)
475	{	507	{
476	/* is this ugly, I ask? */	508	/* is this ugly, I ask? */
477	LEAVE_SCOPE (0);	509	LEAVE_SCOPE (0);
…		…
508		540
509	Safefree (PL_tmps_stack);	541	Safefree (PL_tmps_stack);
510	Safefree (PL_markstack);	542	Safefree (PL_markstack);
511	Safefree (PL_scopestack);	543	Safefree (PL_scopestack);
512	Safefree (PL_savestack);	544	Safefree (PL_savestack);
513	#if PERL_VERSION < 9	545	#if !PERL_VERSION_ATLEAST (5,9,0)
514	Safefree (PL_retstack);	546	Safefree (PL_retstack);
515	#endif	547	#endif
516	}	548	}
517		549
518	static void	550	static void
519	allocate_stack (Coro__State ctx, int alloc)	551	setup_coro (struct coro *coro)
520	{
521	coro_stack *stack;
522
523	New (0, stack, 1, coro_stack);
524
525	stack->refcnt = 1;
526	stack->usecnt = 1;
527	stack->gencnt = ctx->gencnt = 0;
528
529	if (alloc)
530	{
531	#if HAVE_MMAP
532	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
533	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
534	if (stack->sptr == (void *)-1)
535	#endif
536	{
537	stack->ssize = - (STACKSIZE * (long)sizeof (long));
538	New (0, stack->sptr, STACKSIZE, long);
539	}
540	}
541	else
542	stack->sptr = 0;
543
544	ctx->stack = stack;
545	}
546
547	static void
548	deallocate_stack (Coro__State ctx)
549	{
550	coro_stack *stack = ctx->stack;
551
552	ctx->stack = 0;
553
554	if (stack)
555	{
556	if (!--stack->refcnt)
557	{
558	#ifdef HAVE_MMAP
559	if (stack->ssize > 0 && stack->sptr)
560	munmap (stack->sptr, stack->ssize);
561	else
562	#endif
563	Safefree (stack->sptr);
564
565	Safefree (stack);
566	}
567	else if (ctx->gencnt == stack->gencnt)
568	--stack->usecnt;
569	}
570	}
571
572	static void
573	setup_coro (void *arg)
574	{	552	{
575	/*	553	/*
576	* emulate part of the perl startup here.	554	* emulate part of the perl startup here.
577	*/	555	*/
578	dTHX;
579	dSP;
580	Coro__State ctx = (Coro__State)arg;
581	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
582		556
583	coro_init_stacks (aTHX);	557	coro_init_stacks ();
		558
584	/*PL_curcop = 0;*/	559	PL_curcop = 0;
585	/*PL_in_eval = PL_in_eval;*/ /* inherit */	560	PL_in_eval = 0;
		561	PL_curpm = 0;
		562
		563	{
		564	dSP;
		565	LOGOP myop;
		566
		567	/* I have no idea why this is needed, but it is */
		568	PUSHMARK (SP);
		569
586	SvREFCNT_dec (GvAV (PL_defgv));	570	SvREFCNT_dec (GvAV (PL_defgv));
587	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	571	GvAV (PL_defgv) = coro->args; coro->args = 0;
588		572
589	SPAGAIN;
590
591	if (ctx->stack)
592	{
593	ctx->cursp = 0;
594
595	PUSHMARK(SP);
596	PUTBACK;
597	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
598
599	if (SvTRUE (ERRSV))
600	croak (NULL);
601	else
602	croak ("FATAL: CCTXT coroutine returned!");
603	}
604	else
605	{
606	UNOP myop;
607
608	PL_op = (OP *)&myop;
609
610	Zero(&myop, 1, UNOP);	573	Zero (&myop, 1, LOGOP);
611	myop.op_next = Nullop;	574	myop.op_next = Nullop;
612	myop.op_flags = OPf_WANT_VOID;	575	myop.op_flags = OPf_WANT_VOID;
613		576
		577	PL_op = (OP *)&myop;
		578
614	PUSHMARK(SP);	579	PUSHMARK (SP);
615	XPUSHs (sub_init);	580	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
616	/*
617	* the next line is slightly wrong, as PL_op->op_next
618	* is actually being executed so we skip the first op.
619	* that doesn't matter, though, since it is only
620	* pp_nextstate and we never return...
621	* ah yes, and I don't care anyways ;)
622	*/
623	PUTBACK;	581	PUTBACK;
624	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	582	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
625	SPAGAIN;	583	SPAGAIN;
626		584
627	ENTER; /* necessary e.g. for dounwind */	585	ENTER; /* necessary e.g. for dounwind */
628	}	586	}
629	}	587	}
630		588
631	static void	589	static void
632	continue_coro (void *arg)	590	free_coro_mortal ()
633	{	591	{
634	/*
635	* this is a _very_ stripped down perl interpreter ;)
636	*/
637	dTHX;
638	Coro__State ctx = (Coro__State)arg;
639
640	PL_top_env = &ctx->start_env;
641
642	ctx->cursp = 0;
643	PL_op = PL_op->op_next;
644	CALLRUNOPS(aTHX);
645
646	abort ();
647	}
648
649	static void
650	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
651	{
652	dSTACKLEVEL;
653
654	if (prev != next)
655	{
656	if (next->mainstack)
657	{
658	LOCK;
659	SAVE (prev, flags);
660	LOAD (next);
661	UNLOCK;
662
663	/* mark this state as in-use */
664	next->mainstack = 0;
665	next->tmps_ix = -2;
666
667	/* stacklevel changed? if yes, grab the stack for us! */
668	if (flags & TRANSFER_SAVE_CCTXT)
669	{
670	if (!prev->stack)
671	allocate_stack (prev, 0);
672	else if (prev->cursp != stacklevel
673	&& prev->stack->usecnt > 1)
674	{
675	prev->gencnt = ++prev->stack->gencnt;
676	prev->stack->usecnt = 1;
677	}
678
679	/* has our stack been invalidated? */
680	if (next->stack && next->stack->gencnt != next->gencnt)
681	{
682	deallocate_stack (next);
683	allocate_stack (next, 1);
684	coro_create (&(next->stack->cctx),
685	continue_coro, (void *)next,
686	next->stack->sptr, labs (next->stack->ssize));
687	}
688
689	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
690	prev->cursp = stacklevel;
691	/* don't add any code here */
692	}
693	else
694	next->cursp = stacklevel;
695	}
696	else if (next->tmps_ix == -2)
697	croak ("tried to transfer to running coroutine");
698	else
699	{
700	LOCK;
701	SAVE (prev, -1); /* first get rid of the old state */
702	UNLOCK;
703
704	if (flags & TRANSFER_SAVE_CCTXT)
705	{
706	if (!prev->stack)
707	allocate_stack (prev, 0);
708
709	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
710	{
711	PL_top_env = &next->start_env;
712
713	setup_coro (next);
714	next->cursp = stacklevel;
715
716	prev->stack->refcnt++;
717	prev->stack->usecnt++;
718	next->stack = prev->stack;
719	next->gencnt = prev->gencnt;
720	}
721	else
722	{
723	assert (!next->stack);
724	allocate_stack (next, 1);
725	coro_create (&(next->stack->cctx),
726	setup_coro, (void *)next,
727	next->stack->sptr, labs (next->stack->ssize));
728	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
729	prev->cursp = stacklevel;
730	/* don't add any code here */
731	}
732	}
733	else
734	{
735	setup_coro (next);
736	next->cursp = stacklevel;
737	}
738	}
739	}
740
741	LOCK;
742	if (coro_mortal)	592	if (coro_mortal)
743	{	593	{
744	SvREFCNT_dec (coro_mortal);	594	SvREFCNT_dec (coro_mortal);
745	coro_mortal = 0;	595	coro_mortal = 0;
746	}	596	}
		597	}
		598
		599	static void NOINLINE
		600	prepare_cctx (coro_stack *cctx)
		601	{
		602	dSP;
		603	LOGOP myop;
		604
		605	Zero (&myop, 1, LOGOP);
		606	myop.op_next = PL_op;
		607	myop.op_flags = OPf_WANT_VOID;
		608
		609	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
		610
		611	PUSHMARK (SP);
		612	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
		613	PUTBACK;
		614	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		615	SPAGAIN;
		616	}
		617
		618	static void
		619	coro_run (void *arg)
		620	{
		621	/* coro_run is the alternative epilogue of transfer() */
747	UNLOCK;	622	UNLOCK;
748	}
749		623
750	#define SV_CORO(sv,func) \	624	/*
751	do { \	625	* this is a _very_ stripped down perl interpreter ;)
752	if (SvROK (sv)) \	626	*/
753	sv = SvRV (sv); \	627	PL_top_env = &PL_start_env;
754	\	628	/* inject call to cctx_init */
755	if (SvTYPE (sv) == SVt_PVHV) \	629	prepare_cctx ((coro_stack *)arg);
756	{ \
757	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
758	\
759	if (!he) \
760	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
761	\
762	(sv) = SvRV (HeVAL(he)); \
763	} \
764	\
765	/* must also be changed inside Coro::Cont::yield */ \
766	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
767	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
768	\
769	} while(0)
770		630
771	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	631	/* somebody will hit me for both perl_run and PL_restartop */
		632	perl_run (PL_curinterp);
772		633
		634	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		635	abort ();
		636	}
		637
		638	static coro_stack *
		639	stack_new ()
		640	{
		641	coro_stack *stack;
		642
		643	New (0, stack, 1, coro_stack);
		644
		645	#if HAVE_MMAP
		646
		647	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		648	/* mmap suppsedly does allocate-on-write for us */
		649	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		650
		651	if (stack->sptr == (void *)-1)
		652	{
		653	perror ("FATAL: unable to mmap stack for coroutine");
		654	_exit (EXIT_FAILURE);
		655	}
		656
		657	# if STACKGUARD
		658	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		659	# endif
		660
		661	#else
		662
		663	stack->ssize = STACKSIZE * (long)sizeof (long);
		664	New (0, stack->sptr, STACKSIZE, long);
		665
		666	if (!stack->sptr)
		667	{
		668	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		669	_exit (EXIT_FAILURE);
		670	}
		671
		672	#endif
		673
		674	#if USE_VALGRIND
		675	stack->valgrind_id = VALGRIND_STACK_REGISTER (
		676	STACKGUARD * PAGESIZE + (char *)stack->sptr,
		677	stack->ssize + (char *)stack->sptr
		678	);
		679	#endif
		680
		681	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		682
		683	return stack;
		684	}
		685
		686	static void
		687	stack_free (coro_stack *stack)
		688	{
		689	if (!stack)
		690	return;
		691
		692	#if USE_VALGRIND
		693	VALGRIND_STACK_DEREGISTER (stack->valgrind_id);
		694	#endif
		695
		696	#if HAVE_MMAP
		697	munmap (stack->sptr, stack->ssize);
		698	#else
		699	Safefree (stack->sptr);
		700	#endif
		701
		702	Safefree (stack);
		703	}
		704
		705	static coro_stack *stack_first;
		706	static int cctx_count, cctx_idle;
		707
		708	static coro_stack *
		709	stack_get ()
		710	{
		711	coro_stack *stack;
		712
		713	if (stack_first)
		714	{
		715	--cctx_idle;
		716	stack = stack_first;
		717	stack_first = stack->next;
		718	}
		719	else
		720	{
		721	++cctx_count;
		722	stack = stack_new ();
		723	PL_op = PL_op->op_next;
		724	}
		725
		726	return stack;
		727	}
		728
		729	static void
		730	stack_put (coro_stack *stack)
		731	{
		732	++cctx_idle;
		733	stack->next = stack_first;
		734	stack_first = stack;
		735	}
		736
		737	/* never call directly, always through the coro_state_transfer global variable */
		738	static void NOINLINE
		739	transfer (struct coro *prev, struct coro *next, int flags)
		740	{
		741	dSTACKLEVEL;
		742
		743	/* sometimes transfer is only called to set idle_sp */
		744	if (flags == TRANSFER_SET_STACKLEVEL)
		745	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		746	else if (prev != next)
		747	{
		748	coro_stack *prev__stack;
		749
		750	LOCK;
		751
		752	if (next->mainstack)
		753	{
		754	/* coroutine already started */
		755	SAVE (prev, flags);
		756	LOAD (next);
		757	}
		758	else
		759	{
		760	/* need to start coroutine */
		761	/* first get rid of the old state */
		762	SAVE (prev, -1);
		763	/* setup coroutine call */
		764	setup_coro (next);
		765	/* need a stack */
		766	next->stack = 0;
		767	}
		768
		769	if (!prev->stack)
		770	/* create a new empty context */
		771	Newz (0, prev->stack, 1, coro_stack);
		772
		773	prev__stack = prev->stack;
		774
		775	/* possibly "free" the stack */
		776	if (prev__stack->idle_sp == STACKLEVEL)
		777	{
		778	stack_put (prev__stack);
		779	prev->stack = 0;
		780	}
		781
		782	if (!next->stack)
		783	next->stack = stack_get ();
		784
		785	if (prev__stack != next->stack)
		786	{
		787	prev__stack->top_env = PL_top_env;
		788	PL_top_env = next->stack->top_env;
		789	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		790	}
		791
		792	free_coro_mortal ();
		793
		794	UNLOCK;
		795	}
		796	}
		797
		798	struct transfer_args
		799	{
		800	struct coro *prev, *next;
		801	int flags;
		802	};
		803
		804	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		805
		806	static void
		807	coro_state_destroy (struct coro *coro)
		808	{
		809	if (coro->refcnt--)
		810	return;
		811
		812	if (coro->mainstack && coro->mainstack != main_mainstack)
		813	{
		814	struct coro temp;
		815
		816	SAVE ((&temp), TRANSFER_SAVE_ALL);
		817	LOAD (coro);
		818
		819	coro_destroy_stacks ();
		820
		821	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		822
		823	coro->mainstack = 0;
		824	}
		825
		826	stack_free (coro->stack);
		827	SvREFCNT_dec (coro->args);
		828	Safefree (coro);
		829	}
		830
773	static void	831	static int
		832	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		833	{
		834	struct coro *coro = (struct coro *)mg->mg_ptr;
		835	mg->mg_ptr = 0;
		836
		837	coro_state_destroy (coro);
		838
		839	return 0;
		840	}
		841
		842	static int
		843	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		844	{
		845	struct coro *coro = (struct coro *)mg->mg_ptr;
		846
		847	++coro->refcnt;
		848
		849	return 0;
		850	}
		851
		852	static MGVTBL coro_state_vtbl = {
		853	0, 0, 0, 0,
		854	coro_state_clear,
		855	0,
		856	#ifdef MGf_DUP
		857	coro_state_dup,
		858	#else
		859	# define MGf_DUP 0
		860	#endif
		861	};
		862
		863	static struct coro *
		864	SvSTATE (SV *coro)
		865	{
		866	HV *stash;
		867	MAGIC *mg;
		868
		869	if (SvROK (coro))
		870	coro = SvRV (coro);
		871
		872	stash = SvSTASH (coro);
		873	if (stash != coro_stash && stash != coro_state_stash)
		874	{
		875	/* very slow, but rare, check */
		876	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		877	croak ("Coro::State object required");
		878	}
		879
		880	mg = SvMAGIC (coro);
		881	assert (mg->mg_type == PERL_MAGIC_ext);
		882	return (struct coro *)mg->mg_ptr;
		883	}
		884
		885	static void
		886	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		887	{
		888	ta->prev = SvSTATE (prev);
		889	ta->next = SvSTATE (next);
		890	ta->flags = flags;
		891	}
		892
		893	static void
774	api_transfer(pTHX_ SV *prev, SV *next, int flags)	894	api_transfer (SV *prev, SV *next, int flags)
775	{	895	{
776	SV_CORO (prev, "Coro::transfer");	896	dTHX;
777	SV_CORO (next, "Coro::transfer");	897	struct transfer_args ta;
778		898
779	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	899	prepare_transfer (&ta, prev, next, flags);
		900	TRANSFER (ta);
780	}	901	}
781		902
782	/** Coro ********************************************************************/	903	/** Coro ********************************************************************/
783		904
784	#define PRIO_MAX 3	905	#define PRIO_MAX 3
…		…
788	#define PRIO_IDLE -3	909	#define PRIO_IDLE -3
789	#define PRIO_MIN -4	910	#define PRIO_MIN -4
790		911
791	/* for Coro.pm */	912	/* for Coro.pm */
792	static GV *coro_current, *coro_idle;	913	static GV *coro_current, *coro_idle;
793	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	914	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
794	static int coro_nready;	915	static int coro_nready;
795		916
796	static void	917	static void
797	coro_enq (pTHX_ SV *sv)	918	coro_enq (SV *sv)
798	{	919	{
799	SV **xprio;
800	int prio;	920	int prio;
801		921
802	if (SvTYPE (sv) != SVt_PVHV)	922	if (SvTYPE (sv) != SVt_PVHV)
803	croak ("Coro::ready tried to enqueue something that is not a coroutine");	923	croak ("Coro::ready tried to enqueue something that is not a coroutine");
804		924
805	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);	925	prio = SvSTATE (sv)->prio;
806	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
807
808	prio = prio > PRIO_MAX ? PRIO_MAX
809	: prio < PRIO_MIN ? PRIO_MIN
810	: prio;
811		926
812	av_push (coro_ready [prio - PRIO_MIN], sv);	927	av_push (coro_ready [prio - PRIO_MIN], sv);
813	coro_nready++;	928	coro_nready++;
814	}	929	}
815		930
816	static SV *	931	static SV *
817	coro_deq (pTHX_ int min_prio)	932	coro_deq (int min_prio)
818	{	933	{
819	int prio = PRIO_MAX - PRIO_MIN;	934	int prio = PRIO_MAX - PRIO_MIN;
820		935
821	min_prio -= PRIO_MIN;	936	min_prio -= PRIO_MIN;
822	if (min_prio < 0)	937	if (min_prio < 0)
823	min_prio = 0;	938	min_prio = 0;
824		939
825	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	940	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
826	if (av_len (coro_ready[prio]) >= 0)	941	if (AvFILLp (coro_ready [prio]) >= 0)
827	{	942	{
828	coro_nready--;	943	coro_nready--;
829	return av_shift (coro_ready[prio]);	944	return av_shift (coro_ready [prio]);
830	}	945	}
831		946
832	return 0;	947	return 0;
833	}	948	}
834		949
…		…
839		954
840	if (SvROK (coro))	955	if (SvROK (coro))
841	coro = SvRV (coro);	956	coro = SvRV (coro);
842		957
843	LOCK;	958	LOCK;
844	coro_enq (aTHX_ SvREFCNT_inc (coro));	959	coro_enq (SvREFCNT_inc (coro));
845	UNLOCK;	960	UNLOCK;
846	}	961	}
847		962
848	static void	963	static void
		964	prepare_schedule (struct transfer_args *ta)
		965	{
		966	SV *current, *prev, *next;
		967
		968	current = GvSV (coro_current);
		969
		970	for (;;)
		971	{
		972	LOCK;
		973	next = coro_deq (PRIO_MIN);
		974	UNLOCK;
		975
		976	if (next)
		977	break;
		978
		979	{
		980	dSP;
		981
		982	ENTER;
		983	SAVETMPS;
		984
		985	PUSHMARK (SP);
		986	PUTBACK;
		987	call_sv (GvSV (coro_idle), G_DISCARD);
		988
		989	FREETMPS;
		990	LEAVE;
		991	}
		992	}
		993
		994	prev = SvRV (current);
		995	SvRV (current) = next;
		996
		997	/* free this only after the transfer */
		998	LOCK;
		999	free_coro_mortal ();
		1000	UNLOCK;
		1001	coro_mortal = prev;
		1002
		1003	ta->prev = SvSTATE (prev);
		1004	ta->next = SvSTATE (next);
		1005	ta->flags = TRANSFER_SAVE_ALL;
		1006	}
		1007
		1008	static void
		1009	prepare_cede (struct transfer_args *ta)
		1010	{
		1011	LOCK;
		1012	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		1013	UNLOCK;
		1014
		1015	prepare_schedule (ta);
		1016	}
		1017
		1018	static void
849	api_schedule (void)	1019	api_schedule (void)
850	{	1020	{
851	dTHX;	1021	dTHX;
		1022	struct transfer_args ta;
852		1023
853	SV *prev, *next;	1024	prepare_schedule (&ta);
854		1025	TRANSFER (ta);
855	LOCK;
856
857	prev = SvRV (GvSV (coro_current));
858	next = coro_deq (aTHX_ PRIO_MIN);
859
860	if (!next)
861	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
862
863	/* free this only after the transfer */
864	coro_mortal = prev;
865	SV_CORO (prev, "Coro::schedule");
866
867	SvRV (GvSV (coro_current)) = next;
868
869	SV_CORO (next, "Coro::schedule");
870
871	UNLOCK;
872
873	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
874	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
875	}	1026	}
876		1027
877	static void	1028	static void
878	api_cede (void)	1029	api_cede (void)
879	{	1030	{
880	dTHX;	1031	dTHX;
		1032	struct transfer_args ta;
881		1033
882	LOCK;	1034	prepare_cede (&ta);
883	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1035	TRANSFER (ta);
884	UNLOCK;
885
886	api_schedule ();
887	}	1036	}
888		1037
889	MODULE = Coro::State PACKAGE = Coro::State	1038	MODULE = Coro::State PACKAGE = Coro::State
890		1039
891	PROTOTYPES: ENABLE	1040	PROTOTYPES: DISABLE
892		1041
893	BOOT:	1042	BOOT:
894	{ /* {} necessary for stoopid perl-5.6.x */	1043	{
895	#ifdef USE_ITHREADS	1044	#ifdef USE_ITHREADS
896	MUTEX_INIT (&coro_mutex);	1045	MUTEX_INIT (&coro_mutex);
897	#endif	1046	#endif
		1047	BOOT_PAGESIZE;
898		1048
899	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
900	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
901	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1049	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
902		1050
903	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1051	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
904	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1052	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
905	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1053	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
906	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
907		1054
908	main_mainstack = PL_mainstack;	1055	main_mainstack = PL_mainstack;
909		1056
910	coroapi.ver = CORO_API_VERSION;	1057	coroapi.ver = CORO_API_VERSION;
911	coroapi.transfer = api_transfer;	1058	coroapi.transfer = api_transfer;
912	}
913		1059
914	Coro::State	1060	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
915	_newprocess(args)	1061	}
916	SV * args	1062
917	PROTOTYPE: $	1063	SV *
		1064	new (char *klass, ...)
918	CODE:	1065	CODE:
919	Coro__State coro;	1066	{
		1067	struct coro *coro;
		1068	HV *hv;
		1069	int i;
920		1070
921	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
922	croak ("Coro::State::_newprocess expects an arrayref");
923
924	Newz (0, coro, 1, struct coro);	1071	Newz (0, coro, 1, struct coro);
		1072	coro->args = newAV ();
925		1073
926	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1074	hv = newHV ();
		1075	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1076	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1077
		1078	for (i = 1; i < items; i++)
		1079	av_push (coro->args, newSVsv (ST (i)));
		1080
927	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1081	/*coro->mainstack = 0; *//*actual work is done inside transfer */
928	/*coro->stack = 0;*/	1082	/*coro->stack = 0;*/
929		1083	}
930	/* same as JMPENV_BOOTSTRAP */
931	/* we might be able to recycle start_env, but safe is safe */
932	/*Zero(&coro->start_env, 1, JMPENV);*/
933	coro->start_env.je_ret = -1;
934	coro->start_env.je_mustcatch = TRUE;
935
936	RETVAL = coro;
937	OUTPUT:	1084	OUTPUT:
938	RETVAL	1085	RETVAL
939		1086
940	void	1087	void
941	transfer(prev, next, flags)	1088	_set_stacklevel (...)
942	SV *prev	1089	ALIAS:
943	SV *next	1090	Coro::State::transfer = 1
944	int flags	1091	Coro::schedule = 2
945	PROTOTYPE: @	1092	Coro::cede = 3
		1093	Coro::Cont::yield = 4
946	CODE:	1094	CODE:
947	PUTBACK;	1095	{
948	SV_CORO (next, "Coro::transfer");	1096	struct transfer_args ta;
949	SV_CORO (prev, "Coro::transfer");	1097
950	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1098	switch (ix)
951	SPAGAIN;	1099	{
		1100	case 0:
		1101	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
		1102	ta.next = 0;
		1103	ta.flags = TRANSFER_SET_STACKLEVEL;
		1104	break;
		1105
		1106	case 1:
		1107	if (items != 3)
		1108	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1109
		1110	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1111	break;
		1112
		1113	case 2:
		1114	prepare_schedule (&ta);
		1115	break;
		1116
		1117	case 3:
		1118	prepare_cede (&ta);
		1119	break;
		1120
		1121	case 4:
		1122	{
		1123	SV *yieldstack;
		1124	SV *sv;
		1125	AV *defav = GvAV (PL_defgv);
		1126
		1127	yieldstack = *hv_fetch (
		1128	(HV *)SvRV (GvSV (coro_current)),
		1129	"yieldstack", sizeof ("yieldstack") - 1,
		1130	0
		1131	);
		1132
		1133	/* set up @_ -- ugly */
		1134	av_clear (defav);
		1135	av_fill (defav, items - 1);
		1136	while (items--)
		1137	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1138
		1139	sv = av_pop ((AV *)SvRV (yieldstack));
		1140	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1141	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1142	ta.flags = 0;
		1143	SvREFCNT_dec (sv);
		1144	}
		1145	break;
		1146
		1147	}
		1148
		1149	TRANSFER (ta);
		1150	}
952		1151
953	void	1152	void
954	DESTROY(coro)	1153	_clone_state_from (SV *dst, SV *src)
955	Coro::State coro	1154	CODE:
956	CODE:	1155	{
		1156	struct coro *coro_src = SvSTATE (src);
957		1157
958	if (coro->mainstack && coro->mainstack != main_mainstack)	1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
959	{
960	struct coro temp;
961		1159
962	PUTBACK;	1160	++coro_src->refcnt;
963	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1161	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
964	LOAD (aTHX_ coro);	1162	}
965	SPAGAIN;
966
967	destroy_stacks (aTHX);
968
969	LOAD ((&temp)); /* this will get rid of defsv etc.. */
970	SPAGAIN;
971
972	coro->mainstack = 0;
973	}
974
975	deallocate_stack (coro);
976	SvREFCNT_dec (coro->args);
977	Safefree (coro);
978		1163
979	void	1164	void
980	_exit(code)	1165	_exit (code)
981	int code	1166	int code
982	PROTOTYPE: $	1167	PROTOTYPE: $
983	CODE:	1168	CODE:
984	_exit (code);	1169	_exit (code);
985		1170
986	MODULE = Coro::State PACKAGE = Coro::Cont
987
988	# this is slightly dirty (should expose a c-level api)
989
990	void
991	yield(...)
992	PROTOTYPE: @
993	CODE:
994	SV *yieldstack;
995	SV *sv;
996	AV *defav = GvAV (PL_defgv);
997	struct coro *prev, *next;
998
999	yieldstack = *hv_fetch (
1000	(HV *)SvRV (GvSV (coro_current)),
1001	"yieldstack", sizeof ("yieldstack") - 1,
1002	0
1003	);
1004
1005	/* set up @_ -- ugly */
1006	av_clear (defav);
1007	av_fill (defav, items - 1);
1008	while (items--)
1009	av_store (defav, items, SvREFCNT_inc (ST(items)));
1010
1011	sv = av_pop ((AV *)SvRV (yieldstack));
1012	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1013	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1014	SvREFCNT_dec (sv);
1015
1016	transfer (aTHX_ prev, next, 0);
1017
1018	MODULE = Coro::State PACKAGE = Coro	1171	MODULE = Coro::State PACKAGE = Coro
1019		1172
1020	# this is slightly dirty (should expose a c-level api)
1021
1022	BOOT:	1173	BOOT:
1023	{	1174	{
1024	int i;	1175	int i;
		1176
1025	HV *stash = gv_stashpv ("Coro", TRUE);	1177	coro_stash = gv_stashpv ("Coro", TRUE);
1026		1178
1027	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1179	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1028	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1180	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1029	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1181	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1030	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1182	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1031	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1183	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1032	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1184	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1033		1185
1034	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1186	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1035	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1187	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1036		1188
1037	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1189	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1045	coroapi.ready = api_ready;	1197	coroapi.ready = api_ready;
1046	coroapi.nready = &coro_nready;	1198	coroapi.nready = &coro_nready;
1047	coroapi.current = coro_current;	1199	coroapi.current = coro_current;
1048		1200
1049	GCoroAPI = &coroapi;	1201	GCoroAPI = &coroapi;
1050	sv_setiv(sv, (IV)&coroapi);	1202	sv_setiv (sv, (IV)&coroapi);
1051	SvREADONLY_on(sv);	1203	SvREADONLY_on (sv);
1052	}	1204	}
1053	}	1205	}
1054		1206
1055	#if !PERL_MICRO	1207	int
		1208	prio (Coro::State coro, int newprio = 0)
		1209	ALIAS:
		1210	nice = 1
		1211	CODE:
		1212	{
		1213	RETVAL = coro->prio;
		1214
		1215	if (items > 1)
		1216	{
		1217	if (ix)
		1218	newprio += coro->prio;
		1219
		1220	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1221	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1222
		1223	coro->prio = newprio;
		1224	}
		1225	}
1056		1226
1057	void	1227	void
1058	ready(self)	1228	ready (SV *self)
1059	SV * self
1060	PROTOTYPE: $	1229	PROTOTYPE: $
1061	CODE:	1230	CODE:
1062	api_ready (self);	1231	api_ready (self);
1063		1232
1064	#endif
1065
1066	int	1233	int
1067	nready(...)	1234	nready (...)
1068	PROTOTYPE:	1235	PROTOTYPE:
1069	CODE:	1236	CODE:
1070	RETVAL = coro_nready;	1237	RETVAL = coro_nready;
1071	OUTPUT:	1238	OUTPUT:
1072	RETVAL	1239	RETVAL
1073		1240
1074	void	1241	MODULE = Coro::State PACKAGE = Coro::AIO
1075	schedule(...)
1076	PROTOTYPE:
1077	CODE:
1078	api_schedule ();
1079		1242
1080	void
1081	cede(...)
1082	PROTOTYPE:
1083	CODE:
1084	api_cede ();
1085
1086	# and these are hacks
1087	SV *	1243	SV *
1088	_aio_get_state ()	1244	_get_state ()
1089	CODE:	1245	CODE:
1090	{	1246	{
1091	struct {	1247	struct {
1092	int errorno;	1248	int errorno;
1093	int laststype;	1249	int laststype;
…		…
1104	}	1260	}
1105	OUTPUT:	1261	OUTPUT:
1106	RETVAL	1262	RETVAL
1107		1263
1108	void	1264	void
1109	_aio_set_state (char *data_)	1265	_set_state (char *data_)
1110	PROTOTYPE: $	1266	PROTOTYPE: $
1111	CODE:	1267	CODE:
1112	{	1268	{
1113	struct {	1269	struct {
1114	int errorno;	1270	int errorno;

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