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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 1.107 by root, Mon Nov 27 02:15:51 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 (void)0
44	#endif	68	# endif
45		69	#else
46	#define SUB_INIT "Coro::State::initialize"	70	# define PAGESIZE 0
47	#define UCORO_STATE "_coro_state"	71	# define BOOT_PAGESIZE (void)0
		72	#endif
48		73
49	/* The next macro should declare a variable stacklevel that contains and approximation	74	/* 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	75	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
53		79
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		81
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	82	#if __GNUC__ >= 3
		83	# define attribute(x) __attribute__(x)
		84	#else
		85	# define attribute(x)
		86	#endif
		87
		88	#define NOINLINE attribute ((noinline))
57		89
58	#include "CoroAPI.h"	90	#include "CoroAPI.h"
		91
		92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59		93
60	#ifdef USE_ITHREADS	94	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	95	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
66	# define UNLOCK (void)0	100	# define UNLOCK (void)0
67	#endif	101	#endif
68		102
69	static struct CoroAPI coroapi;	103	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	104	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	105	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 */	106	static SV *coro_mortal; /* will be freed after next transfer */
75		107
76	/* this is actually not only the c stack but also c registers etc... */	108	static struct coro_cctx *cctx_first;
		109	static int cctx_count, cctx_idle;
		110
		111	/* this is a structure representing a c-level coroutine */
77	typedef struct {	112	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	113	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		114
82	coro_context cctx;	115	/* the stack */
83
84	void *sptr;	116	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	117	long ssize; /* positive == mmap, otherwise malloc */
86	} coro_stack;
87		118
		119	/* cpu state */
		120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		121	JMPENV *top_env;
		122	coro_context cctx;
		123
		124	#if USE_VALGRIND
		125	int valgrind_id;
		126	#endif
		127	} coro_cctx;
		128
		129	/* this is a structure representing a perl-level coroutine */
88	struct coro {	130	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	131	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	132	coro_cctx *cctx;
91		133
92	/* the optional C context */	134	/* data associated with this coroutine (initial args) */
93	coro_stack *stack;	135	AV *args;
94	void *cursp;
95	int gencnt;	136	int refcnt;
96		137
97	/* optionally saved, might be zero */	138	/* optionally saved, might be zero */
98	AV *defav;	139	AV *defav;
99	SV *defsv;	140	SV *defsv;
100	SV *errsv;	141	SV *errsv;
…		…
130	OP **retstack;	171	OP **retstack;
131	I32 retstack_ix;	172	I32 retstack_ix;
132	I32 retstack_max;	173	I32 retstack_max;
133	PMOP *curpm;	174	PMOP *curpm;
134	COP *curcop;	175	COP *curcop;
135	JMPENV *top_env;
136		176
137	/* data associated with this coroutine (initial args) */	177	/* coro process data */
138	AV *args;	178	int prio;
139	};	179	};
140		180
141	typedef struct coro *Coro__State;	181	typedef struct coro *Coro__State;
142	typedef struct coro *Coro__State_or_hashref;	182	typedef struct coro *Coro__State_or_hashref;
143		183
144	static AV *	184	static AV *
145	coro_clone_padlist (pTHX_ CV *cv)	185	coro_clone_padlist (CV *cv)
146	{	186	{
147	AV *padlist = CvPADLIST (cv);	187	AV *padlist = CvPADLIST (cv);
148	AV *newpadlist, *newpad;	188	AV *newpadlist, *newpad;
149		189
150	newpadlist = newAV ();	190	newpadlist = newAV ();
151	AvREAL_off (newpadlist);	191	AvREAL_off (newpadlist);
		192	#if PERL_VERSION_ATLEAST (5,9,0)
		193	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		194	#else
152	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	195	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		196	#endif
153	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	197	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
154	--AvFILLp (padlist);	198	--AvFILLp (padlist);
155		199
156	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	200	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
157	av_store (newpadlist, 1, (SV *)newpad);	201	av_store (newpadlist, 1, (SV *)newpad);
158		202
159	return newpadlist;	203	return newpadlist;
160	}	204	}
161		205
162	static void	206	static void
163	free_padlist (pTHX_ AV *padlist)	207	free_padlist (AV *padlist)
164	{	208	{
165	/* may be during global destruction */	209	/* may be during global destruction */
166	if (SvREFCNT (padlist))	210	if (SvREFCNT (padlist))
167	{	211	{
168	I32 i = AvFILLp (padlist);	212	I32 i = AvFILLp (padlist);
…		…
189	AV *padlist;	233	AV *padlist;
190	AV *av = (AV *)mg->mg_obj;	234	AV *av = (AV *)mg->mg_obj;
191		235
192	/* casting is fun. */	236	/* casting is fun. */
193	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	237	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
194	free_padlist (aTHX_ padlist);	238	free_padlist (padlist);
195		239
196	SvREFCNT_dec (av);	240	SvREFCNT_dec (av);
197		241
198	return 0;	242	return 0;
199	}	243	}
…		…
202		246
203	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	247	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
204		248
205	/* the next two functions merely cache the padlists */	249	/* the next two functions merely cache the padlists */
206	static void	250	static void
207	get_padlist (pTHX_ CV *cv)	251	get_padlist (CV *cv)
208	{	252	{
209	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	253	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
210		254
211	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	255	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
212	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	256	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
213	else	257	else
214	{	258	{
215	#if 0	259	#if 0
216	/* this should work - but it doesn't :( */	260	/* this is probably cleaner, but also slower? */
217	CV *cp = Perl_cv_clone (aTHX_ cv);	261	CV *cp = Perl_cv_clone (cv);
218	CvPADLIST (cv) = CvPADLIST (cp);	262	CvPADLIST (cv) = CvPADLIST (cp);
219	CvPADLIST (cp) = 0;	263	CvPADLIST (cp) = 0;
220	SvREFCNT_dec (cp);	264	SvREFCNT_dec (cp);
221	#else	265	#else
222	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	266	CvPADLIST (cv) = coro_clone_padlist (cv);
223	#endif	267	#endif
224	}	268	}
225	}	269	}
226		270
227	static void	271	static void
228	put_padlist (pTHX_ CV *cv)	272	put_padlist (CV *cv)
229	{	273	{
230	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	274	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
231		275
232	if (!mg)	276	if (!mg)
233	{	277	{
…		…
241	}	285	}
242		286
243	#define SB do {	287	#define SB do {
244	#define SE } while (0)	288	#define SE } while (0)
245		289
246	#define LOAD(state) load_state(aTHX_ (state));	290	#define LOAD(state) load_state((state));
247	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	291	#define SAVE(state,flags) save_state((state),(flags));
248		292
249	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	293	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
250		294
251	static void	295	static void
252	load_state(pTHX_ Coro__State c)	296	load_state(Coro__State c)
253	{	297	{
254	PL_dowarn = c->dowarn;	298	PL_dowarn = c->dowarn;
255	PL_in_eval = c->in_eval;	299	PL_in_eval = c->in_eval;
256		300
257	PL_curstackinfo = c->curstackinfo;	301	PL_curstackinfo = c->curstackinfo;
…		…
275	PL_scopestack_ix = c->scopestack_ix;	319	PL_scopestack_ix = c->scopestack_ix;
276	PL_scopestack_max = c->scopestack_max;	320	PL_scopestack_max = c->scopestack_max;
277	PL_savestack = c->savestack;	321	PL_savestack = c->savestack;
278	PL_savestack_ix = c->savestack_ix;	322	PL_savestack_ix = c->savestack_ix;
279	PL_savestack_max = c->savestack_max;	323	PL_savestack_max = c->savestack_max;
280	#if PERL_VERSION < 9	324	#if !PERL_VERSION_ATLEAST (5,9,0)
281	PL_retstack = c->retstack;	325	PL_retstack = c->retstack;
282	PL_retstack_ix = c->retstack_ix;	326	PL_retstack_ix = c->retstack_ix;
283	PL_retstack_max = c->retstack_max;	327	PL_retstack_max = c->retstack_max;
284	#endif	328	#endif
285	PL_curpm = c->curpm;	329	PL_curpm = c->curpm;
286	PL_curcop = c->curcop;	330	PL_curcop = c->curcop;
287	PL_top_env = c->top_env;
288		331
289	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	332	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
290	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	333	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
291	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	334	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
292		335
…		…
299	{	342	{
300	AV *padlist = (AV *)POPs;	343	AV *padlist = (AV *)POPs;
301		344
302	if (padlist)	345	if (padlist)
303	{	346	{
304	put_padlist (aTHX_ cv); /* mark this padlist as available */	347	put_padlist (cv); /* mark this padlist as available */
305	CvPADLIST(cv) = padlist;	348	CvPADLIST(cv) = padlist;
306	}	349	}
307		350
308	++CvDEPTH(cv);	351	++CvDEPTH(cv);
309	}	352	}
…		…
311	PUTBACK;	354	PUTBACK;
312	}	355	}
313	}	356	}
314		357
315	static void	358	static void
316	save_state(pTHX_ Coro__State c, int flags)	359	save_state(Coro__State c, int flags)
317	{	360	{
318	{	361	{
319	dSP;	362	dSP;
320	I32 cxix = cxstack_ix;	363	I32 cxix = cxstack_ix;
321	PERL_CONTEXT *ccstk = cxstack;	364	PERL_CONTEXT *ccstk = cxstack;
…		…
349	}	392	}
350		393
351	PUSHs ((SV *)CvPADLIST(cv));	394	PUSHs ((SV *)CvPADLIST(cv));
352	PUSHs ((SV *)cv);	395	PUSHs ((SV *)cv);
353		396
354	get_padlist (aTHX_ cv);	397	get_padlist (cv);
355	}	398	}
356	}	399	}
357	#ifdef CXt_FORMAT	400	#ifdef CXt_FORMAT
358	else if (CxTYPE(cx) == CXt_FORMAT)	401	else if (CxTYPE(cx) == CXt_FORMAT)
359	{	402	{
…		…
403	c->scopestack_ix = PL_scopestack_ix;	446	c->scopestack_ix = PL_scopestack_ix;
404	c->scopestack_max = PL_scopestack_max;	447	c->scopestack_max = PL_scopestack_max;
405	c->savestack = PL_savestack;	448	c->savestack = PL_savestack;
406	c->savestack_ix = PL_savestack_ix;	449	c->savestack_ix = PL_savestack_ix;
407	c->savestack_max = PL_savestack_max;	450	c->savestack_max = PL_savestack_max;
408	#if PERL_VERSION < 9	451	#if !PERL_VERSION_ATLEAST (5,9,0)
409	c->retstack = PL_retstack;	452	c->retstack = PL_retstack;
410	c->retstack_ix = PL_retstack_ix;	453	c->retstack_ix = PL_retstack_ix;
411	c->retstack_max = PL_retstack_max;	454	c->retstack_max = PL_retstack_max;
412	#endif	455	#endif
413	c->curpm = PL_curpm;	456	c->curpm = PL_curpm;
414	c->curcop = PL_curcop;	457	c->curcop = PL_curcop;
415	c->top_env = PL_top_env;
416	}	458	}
417		459
418	/*	460	/*
419	* allocate various perl stacks. This is an exact copy	461	* allocate various perl stacks. This is an exact copy
420	* of perl.c:init_stacks, except that it uses less memory	462	* of perl.c:init_stacks, except that it uses less memory
421	* on the (sometimes correct) assumption that coroutines do	463	* on the (sometimes correct) assumption that coroutines do
422	* not usually need a lot of stackspace.	464	* not usually need a lot of stackspace.
423	*/	465	*/
424	static void	466	static void
425	coro_init_stacks (pTHX)	467	coro_init_stacks ()
426	{	468	{
427	LOCK;
428
429	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	469	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
430	PL_curstackinfo->si_type = PERLSI_MAIN;	470	PL_curstackinfo->si_type = PERLSI_MAIN;
431	PL_curstack = PL_curstackinfo->si_stack;	471	PL_curstack = PL_curstackinfo->si_stack;
432	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	472	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
433		473
…		…
454		494
455	New(54,PL_savestack,96,ANY);	495	New(54,PL_savestack,96,ANY);
456	PL_savestack_ix = 0;	496	PL_savestack_ix = 0;
457	PL_savestack_max = 96;	497	PL_savestack_max = 96;
458		498
459	#if PERL_VERSION < 9	499	#if !PERL_VERSION_ATLEAST (5,9,0)
460	New(54,PL_retstack,8,OP*);	500	New(54,PL_retstack,8,OP*);
461	PL_retstack_ix = 0;	501	PL_retstack_ix = 0;
462	PL_retstack_max = 8;	502	PL_retstack_max = 8;
463	#endif	503	#endif
464
465	UNLOCK;
466	}	504	}
467		505
468	/*	506	/*
469	* destroy the stacks, the callchain etc...	507	* destroy the stacks, the callchain etc...
470	*/	508	*/
471	static void	509	static void
472	destroy_stacks(pTHX)	510	coro_destroy_stacks ()
473	{	511	{
474	if (!IN_DESTRUCT)	512	if (!IN_DESTRUCT)
475	{	513	{
476	/* is this ugly, I ask? */	514	/* is this ugly, I ask? */
477	LEAVE_SCOPE (0);	515	LEAVE_SCOPE (0);
…		…
508		546
509	Safefree (PL_tmps_stack);	547	Safefree (PL_tmps_stack);
510	Safefree (PL_markstack);	548	Safefree (PL_markstack);
511	Safefree (PL_scopestack);	549	Safefree (PL_scopestack);
512	Safefree (PL_savestack);	550	Safefree (PL_savestack);
513	#if PERL_VERSION < 9	551	#if !PERL_VERSION_ATLEAST (5,9,0)
514	Safefree (PL_retstack);	552	Safefree (PL_retstack);
515	#endif	553	#endif
516	}	554	}
517		555
518	static void	556	static void
519	allocate_stack (Coro__State ctx, int alloc)	557	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	{	558	{
575	/*	559	/*
576	* emulate part of the perl startup here.	560	* emulate part of the perl startup here.
577	*/	561	*/
578	dTHX;
579	dSP;
580	Coro__State ctx = (Coro__State)arg;
581	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
582		562
583	coro_init_stacks (aTHX);	563	coro_init_stacks ();
		564
584	/*PL_curcop = 0;*/	565	PL_curcop = 0;
585	/*PL_in_eval = PL_in_eval;*/ /* inherit */	566	PL_in_eval = 0;
		567	PL_curpm = 0;
		568
		569	{
		570	dSP;
		571	LOGOP myop;
		572
		573	/* I have no idea why this is needed, but it is */
		574	PUSHMARK (SP);
		575
586	SvREFCNT_dec (GvAV (PL_defgv));	576	SvREFCNT_dec (GvAV (PL_defgv));
587	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	577	GvAV (PL_defgv) = coro->args; coro->args = 0;
588		578
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);	579	Zero (&myop, 1, LOGOP);
611	myop.op_next = Nullop;	580	myop.op_next = Nullop;
612	myop.op_flags = OPf_WANT_VOID;	581	myop.op_flags = OPf_WANT_VOID;
613		582
		583	PL_op = (OP *)&myop;
		584
614	PUSHMARK(SP);	585	PUSHMARK (SP);
615	XPUSHs (sub_init);	586	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;	587	PUTBACK;
624	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	588	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
625	SPAGAIN;	589	SPAGAIN;
626		590
627	ENTER; /* necessary e.g. for dounwind */	591	ENTER; /* necessary e.g. for dounwind */
628	}	592	}
629	}	593	}
630		594
631	static void	595	static void
632	continue_coro (void *arg)	596	free_coro_mortal ()
633	{	597	{
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)	598	if (coro_mortal)
743	{	599	{
744	SvREFCNT_dec (coro_mortal);	600	SvREFCNT_dec (coro_mortal);
745	coro_mortal = 0;	601	coro_mortal = 0;
746	}	602	}
		603	}
		604
		605	static void NOINLINE
		606	prepare_cctx (coro_cctx *cctx)
		607	{
		608	dSP;
		609	LOGOP myop;
		610
		611	Zero (&myop, 1, LOGOP);
		612	myop.op_next = PL_op;
		613	myop.op_flags = OPf_WANT_VOID;
		614
		615	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		616
		617	PUSHMARK (SP);
		618	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		619	PUTBACK;
		620	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		621	SPAGAIN;
		622	}
		623
		624	static void
		625	coro_run (void *arg)
		626	{
		627	/* coro_run is the alternative epilogue of transfer() */
747	UNLOCK;	628	UNLOCK;
748	}
749		629
750	#define SV_CORO(sv,func) \	630	/*
751	do { \	631	* this is a _very_ stripped down perl interpreter ;)
752	if (SvROK (sv)) \	632	*/
753	sv = SvRV (sv); \	633	PL_top_env = &PL_start_env;
754	\
755	if (SvTYPE (sv) == SVt_PVHV) \
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		634
771	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	635	/* inject call to cctx_init */
		636	prepare_cctx ((coro_cctx *)arg);
772		637
		638	/* somebody will hit me for both perl_run and PL_restartop */
		639	perl_run (PL_curinterp);
		640
		641	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		642	abort ();
		643	}
		644
		645	static coro_cctx *
		646	cctx_new ()
		647	{
		648	coro_cctx *cctx;
		649
		650	++cctx_count;
		651
		652	New (0, cctx, 1, coro_cctx);
		653
		654	#if HAVE_MMAP
		655
		656	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		657	/* mmap suppsedly does allocate-on-write for us */
		658	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		659
		660	if (cctx->sptr == (void *)-1)
		661	{
		662	perror ("FATAL: unable to mmap stack for coroutine");
		663	_exit (EXIT_FAILURE);
		664	}
		665
		666	# if STACKGUARD
		667	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		668	# endif
		669
		670	#else
		671
		672	cctx->ssize = STACKSIZE * (long)sizeof (long);
		673	New (0, cctx->sptr, STACKSIZE, long);
		674
		675	if (!cctx->sptr)
		676	{
		677	perror ("FATAL: unable to malloc stack for coroutine");
		678	_exit (EXIT_FAILURE);
		679	}
		680
		681	#endif
		682
		683	#if USE_VALGRIND
		684	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		685	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		686	cctx->ssize + (char *)cctx->sptr
		687	);
		688	#endif
		689
		690	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		691
		692	return cctx;
		693	}
		694
		695	static void
		696	cctx_free (coro_cctx *cctx)
		697	{
		698	if (!cctx)
		699	return;
		700
		701	--cctx_count;
		702
		703	#if USE_VALGRIND
		704	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		705	#endif
		706
		707	#if HAVE_MMAP
		708	munmap (cctx->sptr, cctx->ssize);
		709	#else
		710	Safefree (cctx->sptr);
		711	#endif
		712
		713	Safefree (cctx);
		714	}
		715
		716	static coro_cctx *
		717	cctx_get ()
		718	{
		719	coro_cctx *cctx;
		720
		721	if (cctx_first)
		722	{
		723	--cctx_idle;
		724	cctx = cctx_first;
		725	cctx_first = cctx->next;
		726	}
		727	else
		728	{
		729	cctx = cctx_new ();
		730	PL_op = PL_op->op_next;
		731	}
		732
		733	return cctx;
		734	}
		735
		736	static void
		737	cctx_put (coro_cctx *cctx)
		738	{
		739	++cctx_idle;
		740	cctx->next = cctx_first;
		741	cctx_first = cctx;
		742	}
		743
		744	/* never call directly, always through the coro_state_transfer global variable */
		745	static void NOINLINE
		746	transfer (struct coro *prev, struct coro *next, int flags)
		747	{
		748	dSTACKLEVEL;
		749
		750	/* sometimes transfer is only called to set idle_sp */
		751	if (flags == TRANSFER_SET_STACKLEVEL)
		752	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		753	else if (prev != next)
		754	{
		755	coro_cctx *prev__cctx;
		756
		757	LOCK;
		758
		759	if (next->mainstack)
		760	{
		761	/* coroutine already started */
		762	SAVE (prev, flags);
		763	LOAD (next);
		764	}
		765	else
		766	{
		767	/* need to start coroutine */
		768	/* first get rid of the old state */
		769	SAVE (prev, -1);
		770	/* setup coroutine call */
		771	setup_coro (next);
		772	/* need a stack */
		773	next->cctx = 0;
		774	}
		775
		776	if (!prev->cctx)
		777	/* create a new empty context */
		778	Newz (0, prev->cctx, 1, coro_cctx);
		779
		780	prev__cctx = prev->cctx;
		781
		782	/* possibly "free" the cctx */
		783	if (prev__cctx->idle_sp == STACKLEVEL)
		784	{
		785	cctx_put (prev__cctx);
		786	prev->cctx = 0;
		787	}
		788
		789	if (!next->cctx)
		790	next->cctx = cctx_get ();
		791
		792	if (prev__cctx != next->cctx)
		793	{
		794	prev__cctx->top_env = PL_top_env;
		795	PL_top_env = next->cctx->top_env;
		796	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		797	}
		798
		799	free_coro_mortal ();
		800
		801	UNLOCK;
		802	}
		803	}
		804
		805	struct transfer_args
		806	{
		807	struct coro *prev, *next;
		808	int flags;
		809	};
		810
		811	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		812
		813	static void
		814	coro_state_destroy (struct coro *coro)
		815	{
		816	if (coro->refcnt--)
		817	return;
		818
		819	if (coro->mainstack && coro->mainstack != main_mainstack)
		820	{
		821	struct coro temp;
		822
		823	SAVE ((&temp), TRANSFER_SAVE_ALL);
		824	LOAD (coro);
		825
		826	coro_destroy_stacks ();
		827
		828	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		829
		830	coro->mainstack = 0;
		831	}
		832
		833	cctx_free (coro->cctx);
		834	SvREFCNT_dec (coro->args);
		835	Safefree (coro);
		836	}
		837
773	static void	838	static int
		839	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		840	{
		841	struct coro *coro = (struct coro *)mg->mg_ptr;
		842	mg->mg_ptr = 0;
		843
		844	coro_state_destroy (coro);
		845
		846	return 0;
		847	}
		848
		849	static int
		850	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		851	{
		852	struct coro *coro = (struct coro *)mg->mg_ptr;
		853
		854	++coro->refcnt;
		855
		856	return 0;
		857	}
		858
		859	static MGVTBL coro_state_vtbl = {
		860	0, 0, 0, 0,
		861	coro_state_clear,
		862	0,
		863	#ifdef MGf_DUP
		864	coro_state_dup,
		865	#else
		866	# define MGf_DUP 0
		867	#endif
		868	};
		869
		870	static struct coro *
		871	SvSTATE (SV *coro)
		872	{
		873	HV *stash;
		874	MAGIC *mg;
		875
		876	if (SvROK (coro))
		877	coro = SvRV (coro);
		878
		879	stash = SvSTASH (coro);
		880	if (stash != coro_stash && stash != coro_state_stash)
		881	{
		882	/* very slow, but rare, check */
		883	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		884	croak ("Coro::State object required");
		885	}
		886
		887	mg = SvMAGIC (coro);
		888	assert (mg->mg_type == PERL_MAGIC_ext);
		889	return (struct coro *)mg->mg_ptr;
		890	}
		891
		892	static void
		893	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		894	{
		895	ta->prev = SvSTATE (prev);
		896	ta->next = SvSTATE (next);
		897	ta->flags = flags;
		898	}
		899
		900	static void
774	api_transfer(pTHX_ SV *prev, SV *next, int flags)	901	api_transfer (SV *prev, SV *next, int flags)
775	{	902	{
776	SV_CORO (prev, "Coro::transfer");	903	dTHX;
777	SV_CORO (next, "Coro::transfer");	904	struct transfer_args ta;
778		905
779	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	906	prepare_transfer (&ta, prev, next, flags);
		907	TRANSFER (ta);
780	}	908	}
781		909
782	/** Coro ********************************************************************/	910	/** Coro ********************************************************************/
783		911
784	#define PRIO_MAX 3	912	#define PRIO_MAX 3
…		…
788	#define PRIO_IDLE -3	916	#define PRIO_IDLE -3
789	#define PRIO_MIN -4	917	#define PRIO_MIN -4
790		918
791	/* for Coro.pm */	919	/* for Coro.pm */
792	static GV *coro_current, *coro_idle;	920	static GV *coro_current, *coro_idle;
793	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	921	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
794	static int coro_nready;	922	static int coro_nready;
795		923
796	static void	924	static void
797	coro_enq (pTHX_ SV *sv)	925	coro_enq (SV *sv)
798	{	926	{
799	SV **xprio;
800	int prio;	927	int prio;
801		928
802	if (SvTYPE (sv) != SVt_PVHV)	929	if (SvTYPE (sv) != SVt_PVHV)
803	croak ("Coro::ready tried to enqueue something that is not a coroutine");	930	croak ("Coro::ready tried to enqueue something that is not a coroutine");
804		931
805	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);	932	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		933
812	av_push (coro_ready [prio - PRIO_MIN], sv);	934	av_push (coro_ready [prio - PRIO_MIN], sv);
813	coro_nready++;	935	coro_nready++;
814	}	936	}
815		937
816	static SV *	938	static SV *
817	coro_deq (pTHX_ int min_prio)	939	coro_deq (int min_prio)
818	{	940	{
819	int prio = PRIO_MAX - PRIO_MIN;	941	int prio = PRIO_MAX - PRIO_MIN;
820		942
821	min_prio -= PRIO_MIN;	943	min_prio -= PRIO_MIN;
822	if (min_prio < 0)	944	if (min_prio < 0)
823	min_prio = 0;	945	min_prio = 0;
824		946
825	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	947	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
826	if (av_len (coro_ready[prio]) >= 0)	948	if (AvFILLp (coro_ready [prio]) >= 0)
827	{	949	{
828	coro_nready--;	950	coro_nready--;
829	return av_shift (coro_ready[prio]);	951	return av_shift (coro_ready [prio]);
830	}	952	}
831		953
832	return 0;	954	return 0;
833	}	955	}
834		956
…		…
839		961
840	if (SvROK (coro))	962	if (SvROK (coro))
841	coro = SvRV (coro);	963	coro = SvRV (coro);
842		964
843	LOCK;	965	LOCK;
844	coro_enq (aTHX_ SvREFCNT_inc (coro));	966	coro_enq (SvREFCNT_inc (coro));
845	UNLOCK;	967	UNLOCK;
846	}	968	}
847		969
848	static void	970	static void
		971	prepare_schedule (struct transfer_args *ta)
		972	{
		973	SV *current, *prev, *next;
		974
		975	current = GvSV (coro_current);
		976
		977	for (;;)
		978	{
		979	LOCK;
		980	next = coro_deq (PRIO_MIN);
		981	UNLOCK;
		982
		983	if (next)
		984	break;
		985
		986	{
		987	dSP;
		988
		989	ENTER;
		990	SAVETMPS;
		991
		992	PUSHMARK (SP);
		993	PUTBACK;
		994	call_sv (GvSV (coro_idle), G_DISCARD);
		995
		996	FREETMPS;
		997	LEAVE;
		998	}
		999	}
		1000
		1001	prev = SvRV (current);
		1002	SvRV (current) = next;
		1003
		1004	/* free this only after the transfer */
		1005	LOCK;
		1006	free_coro_mortal ();
		1007	UNLOCK;
		1008	coro_mortal = prev;
		1009
		1010	ta->prev = SvSTATE (prev);
		1011	ta->next = SvSTATE (next);
		1012	ta->flags = TRANSFER_SAVE_ALL;
		1013	}
		1014
		1015	static void
		1016	prepare_cede (struct transfer_args *ta)
		1017	{
		1018	LOCK;
		1019	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		1020	UNLOCK;
		1021
		1022	prepare_schedule (ta);
		1023	}
		1024
		1025	static void
849	api_schedule (void)	1026	api_schedule (void)
850	{	1027	{
851	dTHX;	1028	dTHX;
		1029	struct transfer_args ta;
852		1030
853	SV *prev, *next;	1031	prepare_schedule (&ta);
854		1032	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	}	1033	}
876		1034
877	static void	1035	static void
878	api_cede (void)	1036	api_cede (void)
879	{	1037	{
880	dTHX;	1038	dTHX;
		1039	struct transfer_args ta;
881		1040
882	LOCK;	1041	prepare_cede (&ta);
883	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1042	TRANSFER (ta);
884	UNLOCK;
885
886	api_schedule ();
887	}	1043	}
888		1044
889	MODULE = Coro::State PACKAGE = Coro::State	1045	MODULE = Coro::State PACKAGE = Coro::State
890		1046
891	PROTOTYPES: ENABLE	1047	PROTOTYPES: DISABLE
892		1048
893	BOOT:	1049	BOOT:
894	{ /* {} necessary for stoopid perl-5.6.x */	1050	{
895	#ifdef USE_ITHREADS	1051	#ifdef USE_ITHREADS
896	MUTEX_INIT (&coro_mutex);	1052	MUTEX_INIT (&coro_mutex);
897	#endif	1053	#endif
		1054	BOOT_PAGESIZE;
898		1055
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);	1056	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
902		1057
903	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1058	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
904	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1059	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
905	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1060	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
906	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
907		1061
908	main_mainstack = PL_mainstack;	1062	main_mainstack = PL_mainstack;
909		1063
910	coroapi.ver = CORO_API_VERSION;	1064	coroapi.ver = CORO_API_VERSION;
911	coroapi.transfer = api_transfer;	1065	coroapi.transfer = api_transfer;
912	}
913		1066
914	Coro::State	1067	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
915	_newprocess(args)	1068	}
916	SV * args	1069
917	PROTOTYPE: $	1070	SV *
		1071	new (char *klass, ...)
918	CODE:	1072	CODE:
919	Coro__State coro;	1073	{
		1074	struct coro *coro;
		1075	HV *hv;
		1076	int i;
920		1077
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);	1078	Newz (0, coro, 1, struct coro);
		1079	coro->args = newAV ();
925		1080
926	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1081	hv = newHV ();
927	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1082	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
928	/*coro->stack = 0;*/	1083	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
929		1084
930	/* same as JMPENV_BOOTSTRAP */	1085	for (i = 1; i < items; i++)
931	/* we might be able to recycle start_env, but safe is safe */	1086	av_push (coro->args, newSVsv (ST (i)));
932	/*Zero(&coro->start_env, 1, JMPENV);*/	1087	}
933	coro->start_env.je_ret = -1;
934	coro->start_env.je_mustcatch = TRUE;
935
936	RETVAL = coro;
937	OUTPUT:	1088	OUTPUT:
938	RETVAL	1089	RETVAL
939		1090
940	void	1091	void
941	transfer(prev, next, flags)	1092	_set_stacklevel (...)
942	SV *prev	1093	ALIAS:
943	SV *next	1094	Coro::State::transfer = 1
944	int flags	1095	Coro::schedule = 2
945	PROTOTYPE: @	1096	Coro::cede = 3
		1097	Coro::Cont::yield = 4
946	CODE:	1098	CODE:
947	PUTBACK;	1099	{
948	SV_CORO (next, "Coro::transfer");	1100	struct transfer_args ta;
949	SV_CORO (prev, "Coro::transfer");	1101
950	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1102	switch (ix)
951	SPAGAIN;	1103	{
		1104	case 0:
		1105	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1106	ta.next = 0;
		1107	ta.flags = TRANSFER_SET_STACKLEVEL;
		1108	break;
		1109
		1110	case 1:
		1111	if (items != 3)
		1112	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1113
		1114	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1115	break;
		1116
		1117	case 2:
		1118	prepare_schedule (&ta);
		1119	break;
		1120
		1121	case 3:
		1122	prepare_cede (&ta);
		1123	break;
		1124
		1125	case 4:
		1126	{
		1127	SV *yieldstack;
		1128	SV *sv;
		1129	AV *defav = GvAV (PL_defgv);
		1130
		1131	yieldstack = *hv_fetch (
		1132	(HV *)SvRV (GvSV (coro_current)),
		1133	"yieldstack", sizeof ("yieldstack") - 1,
		1134	0
		1135	);
		1136
		1137	/* set up @_ -- ugly */
		1138	av_clear (defav);
		1139	av_fill (defav, items - 1);
		1140	while (items--)
		1141	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1142
		1143	sv = av_pop ((AV *)SvRV (yieldstack));
		1144	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1145	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1146	ta.flags = 0;
		1147	SvREFCNT_dec (sv);
		1148	}
		1149	break;
		1150
		1151	}
		1152
		1153	TRANSFER (ta);
		1154	}
952		1155
953	void	1156	void
954	DESTROY(coro)	1157	_clone_state_from (SV *dst, SV *src)
955	Coro::State coro	1158	CODE:
956	CODE:	1159	{
		1160	struct coro *coro_src = SvSTATE (src);
957		1161
958	if (coro->mainstack && coro->mainstack != main_mainstack)	1162	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
959	{
960	struct coro temp;
961		1163
962	PUTBACK;	1164	++coro_src->refcnt;
963	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1165	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
964	LOAD (aTHX_ coro);	1166	}
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		1167
979	void	1168	void
980	_exit(code)	1169	_exit (code)
981	int code	1170	int code
982	PROTOTYPE: $	1171	PROTOTYPE: $
983	CODE:	1172	CODE:
984	_exit (code);	1173	_exit (code);
985		1174
986	MODULE = Coro::State PACKAGE = Coro::Cont	1175	int
		1176	cctx_count ()
		1177	CODE:
		1178	RETVAL = cctx_count;
		1179	OUTPUT:
		1180	RETVAL
987		1181
988	# this is slightly dirty (should expose a c-level api)	1182	int
989		1183	cctx_idle ()
990	void	1184	CODE:
991	yield(...)	1185	RETVAL = cctx_idle;
992	PROTOTYPE: @	1186	OUTPUT:
993	CODE:	1187	RETVAL
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		1188
1018	MODULE = Coro::State PACKAGE = Coro	1189	MODULE = Coro::State PACKAGE = Coro
1019		1190
1020	# this is slightly dirty (should expose a c-level api)
1021
1022	BOOT:	1191	BOOT:
1023	{	1192	{
1024	int i;	1193	int i;
		1194
1025	HV *stash = gv_stashpv ("Coro", TRUE);	1195	coro_stash = gv_stashpv ("Coro", TRUE);
1026		1196
1027	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1197	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1028	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1198	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1029	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1199	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1030	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1200	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1031	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1201	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1032	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1202	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1033		1203
1034	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1204	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1035	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1205	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1036		1206
1037	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1207	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1045	coroapi.ready = api_ready;	1215	coroapi.ready = api_ready;
1046	coroapi.nready = &coro_nready;	1216	coroapi.nready = &coro_nready;
1047	coroapi.current = coro_current;	1217	coroapi.current = coro_current;
1048		1218
1049	GCoroAPI = &coroapi;	1219	GCoroAPI = &coroapi;
1050	sv_setiv(sv, (IV)&coroapi);	1220	sv_setiv (sv, (IV)&coroapi);
1051	SvREADONLY_on(sv);	1221	SvREADONLY_on (sv);
1052	}	1222	}
1053	}	1223	}
1054		1224
1055	#if !PERL_MICRO	1225	int
		1226	prio (Coro::State coro, int newprio = 0)
		1227	ALIAS:
		1228	nice = 1
		1229	CODE:
		1230	{
		1231	RETVAL = coro->prio;
		1232
		1233	if (items > 1)
		1234	{
		1235	if (ix)
		1236	newprio += coro->prio;
		1237
		1238	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1239	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1240
		1241	coro->prio = newprio;
		1242	}
		1243	}
1056		1244
1057	void	1245	void
1058	ready(self)	1246	ready (SV *self)
1059	SV * self
1060	PROTOTYPE: $	1247	PROTOTYPE: $
1061	CODE:	1248	CODE:
1062	api_ready (self);	1249	api_ready (self);
1063		1250
1064	#endif
1065
1066	int	1251	int
1067	nready(...)	1252	nready (...)
1068	PROTOTYPE:	1253	PROTOTYPE:
1069	CODE:	1254	CODE:
1070	RETVAL = coro_nready;	1255	RETVAL = coro_nready;
1071	OUTPUT:	1256	OUTPUT:
1072	RETVAL	1257	RETVAL
1073		1258
1074	void	1259	MODULE = Coro::State PACKAGE = Coro::AIO
1075	schedule(...)
1076	PROTOTYPE:
1077	CODE:
1078	api_schedule ();
1079		1260
1080	void
1081	cede(...)
1082	PROTOTYPE:
1083	CODE:
1084	api_cede ();
1085
1086	# and these are hacks
1087	SV *	1261	SV *
1088	_aio_get_state ()	1262	_get_state ()
1089	CODE:	1263	CODE:
1090	{	1264	{
1091	struct {	1265	struct {
1092	int errorno;	1266	int errorno;
1093	int laststype;	1267	int laststype;
…		…
1104	}	1278	}
1105	OUTPUT:	1279	OUTPUT:
1106	RETVAL	1280	RETVAL
1107		1281
1108	void	1282	void
1109	_aio_set_state (char *data_)	1283	_set_state (char *data_)
1110	PROTOTYPE: $	1284	PROTOTYPE: $
1111	CODE:	1285	CODE:
1112	{	1286	{
1113	struct {	1287	struct {
1114	int errorno;	1288	int errorno;

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