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Comparing Coro/Coro/State.xs (file contents):
Revision 1.62 by root, Tue Feb 22 19:51:58 2005 UTC vs.
Revision 1.104 by root, Mon Nov 27 01:51:02 2006 UTC

1	#define PERL_NO_GET_CONTEXT	1	#include "libcoro/coro.c"
2		2
3	#include "EXTERN.h"	3	#include "EXTERN.h"
4	#include "perl.h"	4	#include "perl.h"
5	#include "XSUB.h"	5	#include "XSUB.h"
6		6
7	#include "patchlevel.h"	7	#include "patchlevel.h"
8		8
9	#if PATCHLEVEL < 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)
10	# ifndef PL_ppaddr	20	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	21	# define PL_ppaddr ppaddr
12	# endif	22	# endif
13	# ifndef call_sv	23	# ifndef call_sv
14	# define call_sv perl_call_sv	24	# define call_sv perl_call_sv
…		…
25	# ifndef IS_PADCONST	35	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	36	# define IS_PADCONST(v) 0
27	# endif	37	# endif
28	#endif	38	#endif
29		39
30	#include "libcoro/coro.c"
31
32	#include <signal.h>	40	#include <stdio.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)
64	#else	95	#else
65	# define LOCK 0	96	# define LOCK (void)0
66	# define UNLOCK 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;
…		…
128	I32 savestack_ix;	163	I32 savestack_ix;
129	I32 savestack_max;	164	I32 savestack_max;
130	OP **retstack;	165	OP **retstack;
131	I32 retstack_ix;	166	I32 retstack_ix;
132	I32 retstack_max;	167	I32 retstack_max;
		168	PMOP *curpm;
133	COP *curcop;	169	COP *curcop;
134	JMPENV *top_env;
135		170
136	/* data associated with this coroutine (initial args) */	171	/* coro process data */
137	AV *args;	172	int prio;
138	};	173	};
139		174
140	typedef struct coro *Coro__State;	175	typedef struct coro *Coro__State;
141	typedef struct coro *Coro__State_or_hashref;	176	typedef struct coro *Coro__State_or_hashref;
142		177
143	/* mostly copied from op.c:cv_clone2 */	178	static AV *
144	STATIC AV *	179	coro_clone_padlist (CV *cv)
145	clone_padlist (pTHX_ AV *protopadlist)
146	{	180	{
147	AV *av;	181	AV *padlist = CvPADLIST (cv);
148	I32 ix;
149	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
150	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
151	SV **pname = AvARRAY (protopad_name);
152	SV **ppad = AvARRAY (protopad);
153	I32 fname = AvFILLp (protopad_name);
154	I32 fpad = AvFILLp (protopad);
155	AV *newpadlist, *newpad_name, *newpad;	182	AV *newpadlist, *newpad;
156	SV **npad;
157
158	newpad_name = newAV ();
159	for (ix = fname; ix >= 0; ix--)
160	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
161
162	newpad = newAV ();
163	av_fill (newpad, AvFILLp (protopad));
164	npad = AvARRAY (newpad);
165		183
166	newpadlist = newAV ();	184	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	185	AvREAL_off (newpadlist);
168	av_store (newpadlist, 0, (SV *) newpad_name);	186	#if PERL_VERSION_ATLEAST (5,9,0)
		187	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		188	#else
		189	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		190	#endif
		191	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		192	--AvFILLp (padlist);
		193
		194	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
169	av_store (newpadlist, 1, (SV *) newpad);	195	av_store (newpadlist, 1, (SV *)newpad);
170
171	av = newAV (); /* will be @_ */
172	av_extend (av, 0);
173	av_store (newpad, 0, (SV *) av);
174	AvFLAGS (av) = AVf_REIFY;
175
176	for (ix = fpad; ix > 0; ix--)
177	{
178	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
179
180	if (namesv && namesv != &PL_sv_undef)
181	{
182	char *name = SvPVX (namesv); /* XXX */
183
184	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
185	{ /* lexical from outside? */
186	npad[ix] = SvREFCNT_inc (ppad[ix]);
187	}
188	else
189	{ /* our own lexical */
190	SV *sv;
191	if (*name == '&')
192	sv = SvREFCNT_inc (ppad[ix]);
193	else if (*name == '@')
194	sv = (SV *) newAV ();
195	else if (*name == '%')
196	sv = (SV *) newHV ();
197	else
198	sv = NEWSV (0, 0);
199
200	#ifdef SvPADBUSY
201	if (!SvPADBUSY (sv))
202	#endif
203	SvPADMY_on (sv);
204
205	npad[ix] = sv;
206	}
207	}
208	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
209	{
210	npad[ix] = SvREFCNT_inc (ppad[ix]);
211	}
212	else
213	{
214	SV *sv = NEWSV (0, 0);
215	SvPADTMP_on (sv);
216	npad[ix] = sv;
217	}
218	}
219
220	#if 0 /* return -ENOTUNDERSTOOD */
221	/* Now that vars are all in place, clone nested closures. */
222
223	for (ix = fpad; ix > 0; ix--) {
224	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
225	if (namesv
226	&& namesv != &PL_sv_undef
227	&& !(SvFLAGS(namesv) & SVf_FAKE)
228	&& *SvPVX(namesv) == '&'
229	&& CvCLONE(ppad[ix]))
230	{
231	CV *kid = cv_clone((CV*)ppad[ix]);
232	SvREFCNT_dec(ppad[ix]);
233	CvCLONE_on(kid);
234	SvPADMY_on(kid);
235	npad[ix] = (SV*)kid;
236	}
237	}
238	#endif
239		196
240	return newpadlist;	197	return newpadlist;
241	}	198	}
242		199
243	STATIC void	200	static void
244	free_padlist (pTHX_ AV *padlist)	201	free_padlist (AV *padlist)
245	{	202	{
246	/* may be during global destruction */	203	/* may be during global destruction */
247	if (SvREFCNT (padlist))	204	if (SvREFCNT (padlist))
248	{	205	{
249	I32 i = AvFILLp (padlist);	206	I32 i = AvFILLp (padlist);
…		…
262		219
263	SvREFCNT_dec ((SV*)padlist);	220	SvREFCNT_dec ((SV*)padlist);
264	}	221	}
265	}	222	}
266		223
267	STATIC int	224	static int
268	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	225	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
269	{	226	{
270	AV *padlist;	227	AV *padlist;
271	AV *av = (AV *)mg->mg_obj;	228	AV *av = (AV *)mg->mg_obj;
272		229
273	/* casting is fun. */	230	/* casting is fun. */
274	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	231	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275	free_padlist (aTHX_ padlist);	232	free_padlist (padlist);
276		233
277	SvREFCNT_dec (av);	234	SvREFCNT_dec (av);
		235
		236	return 0;
278	}	237	}
279		238
280	#define PERL_MAGIC_coro PERL_MAGIC_ext	239	#define PERL_MAGIC_coro PERL_MAGIC_ext
281		240
282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	241	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
283		242
284	/* the next two functions merely cache the padlists */	243	/* the next two functions merely cache the padlists */
285	STATIC void	244	static void
286	get_padlist (pTHX_ CV *cv)	245	get_padlist (CV *cv)
287	{	246	{
288	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
289		248
290	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	249	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
291	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	250	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
292	else	251	else
		252	{
		253	#if 0
		254	/* this is probably cleaner, but also slower? */
		255	CV *cp = Perl_cv_clone (cv);
		256	CvPADLIST (cv) = CvPADLIST (cp);
		257	CvPADLIST (cp) = 0;
		258	SvREFCNT_dec (cp);
		259	#else
293	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	260	CvPADLIST (cv) = coro_clone_padlist (cv);
		261	#endif
		262	}
294	}	263	}
295		264
296	STATIC void	265	static void
297	put_padlist (pTHX_ CV *cv)	266	put_padlist (CV *cv)
298	{	267	{
299	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	268	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
300		269
301	if (!mg)	270	if (!mg)
302	{	271	{
…		…
310	}	279	}
311		280
312	#define SB do {	281	#define SB do {
313	#define SE } while (0)	282	#define SE } while (0)
314		283
315	#define LOAD(state) load_state(aTHX_ (state));	284	#define LOAD(state) load_state((state));
316	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	285	#define SAVE(state,flags) save_state((state),(flags));
317		286
318	#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
319		288
320	static void	289	static void
321	load_state(pTHX_ Coro__State c)	290	load_state(Coro__State c)
322	{	291	{
323	PL_dowarn = c->dowarn;	292	PL_dowarn = c->dowarn;
324	PL_in_eval = c->in_eval;	293	PL_in_eval = c->in_eval;
325		294
326	PL_curstackinfo = c->curstackinfo;	295	PL_curstackinfo = c->curstackinfo;
…		…
344	PL_scopestack_ix = c->scopestack_ix;	313	PL_scopestack_ix = c->scopestack_ix;
345	PL_scopestack_max = c->scopestack_max;	314	PL_scopestack_max = c->scopestack_max;
346	PL_savestack = c->savestack;	315	PL_savestack = c->savestack;
347	PL_savestack_ix = c->savestack_ix;	316	PL_savestack_ix = c->savestack_ix;
348	PL_savestack_max = c->savestack_max;	317	PL_savestack_max = c->savestack_max;
		318	#if !PERL_VERSION_ATLEAST (5,9,0)
349	PL_retstack = c->retstack;	319	PL_retstack = c->retstack;
350	PL_retstack_ix = c->retstack_ix;	320	PL_retstack_ix = c->retstack_ix;
351	PL_retstack_max = c->retstack_max;	321	PL_retstack_max = c->retstack_max;
		322	#endif
		323	PL_curpm = c->curpm;
352	PL_curcop = c->curcop;	324	PL_curcop = c->curcop;
353	PL_top_env = c->top_env;
354		325
355	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	326	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
356	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	327	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
357	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	328	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
358		329
…		…
365	{	336	{
366	AV *padlist = (AV *)POPs;	337	AV *padlist = (AV *)POPs;
367		338
368	if (padlist)	339	if (padlist)
369	{	340	{
370	put_padlist (aTHX_ cv); /* mark this padlist as available */	341	put_padlist (cv); /* mark this padlist as available */
371	CvPADLIST(cv) = padlist;	342	CvPADLIST(cv) = padlist;
372	}	343	}
373		344
374	++CvDEPTH(cv);	345	++CvDEPTH(cv);
375	}	346	}
…		…
377	PUTBACK;	348	PUTBACK;
378	}	349	}
379	}	350	}
380		351
381	static void	352	static void
382	save_state(pTHX_ Coro__State c, int flags)	353	save_state(Coro__State c, int flags)
383	{	354	{
384	{	355	{
385	dSP;	356	dSP;
386	I32 cxix = cxstack_ix;	357	I32 cxix = cxstack_ix;
387	PERL_CONTEXT *ccstk = cxstack;	358	PERL_CONTEXT *ccstk = cxstack;
…		…
415	}	386	}
416		387
417	PUSHs ((SV *)CvPADLIST(cv));	388	PUSHs ((SV *)CvPADLIST(cv));
418	PUSHs ((SV *)cv);	389	PUSHs ((SV *)cv);
419		390
420	get_padlist (aTHX_ cv); /* this is a monster */	391	get_padlist (cv);
421	}	392	}
422	}	393	}
423	#ifdef CXt_FORMAT	394	#ifdef CXt_FORMAT
424	else if (CxTYPE(cx) == CXt_FORMAT)	395	else if (CxTYPE(cx) == CXt_FORMAT)
425	{	396	{
…		…
469	c->scopestack_ix = PL_scopestack_ix;	440	c->scopestack_ix = PL_scopestack_ix;
470	c->scopestack_max = PL_scopestack_max;	441	c->scopestack_max = PL_scopestack_max;
471	c->savestack = PL_savestack;	442	c->savestack = PL_savestack;
472	c->savestack_ix = PL_savestack_ix;	443	c->savestack_ix = PL_savestack_ix;
473	c->savestack_max = PL_savestack_max;	444	c->savestack_max = PL_savestack_max;
		445	#if !PERL_VERSION_ATLEAST (5,9,0)
474	c->retstack = PL_retstack;	446	c->retstack = PL_retstack;
475	c->retstack_ix = PL_retstack_ix;	447	c->retstack_ix = PL_retstack_ix;
476	c->retstack_max = PL_retstack_max;	448	c->retstack_max = PL_retstack_max;
		449	#endif
		450	c->curpm = PL_curpm;
477	c->curcop = PL_curcop;	451	c->curcop = PL_curcop;
478	c->top_env = PL_top_env;
479	}	452	}
480		453
481	/*	454	/*
482	* allocate various perl stacks. This is an exact copy	455	* allocate various perl stacks. This is an exact copy
483	* of perl.c:init_stacks, except that it uses less memory	456	* of perl.c:init_stacks, except that it uses less memory
484	* on the (sometimes correct) assumption that coroutines do	457	* on the (sometimes correct) assumption that coroutines do
485	* not usually need a lot of stackspace.	458	* not usually need a lot of stackspace.
486	*/	459	*/
487	STATIC void	460	static void
488	coro_init_stacks (pTHX)	461	coro_init_stacks ()
489	{	462	{
490	LOCK;
491
492	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	463	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
493	PL_curstackinfo->si_type = PERLSI_MAIN;	464	PL_curstackinfo->si_type = PERLSI_MAIN;
494	PL_curstack = PL_curstackinfo->si_stack;	465	PL_curstack = PL_curstackinfo->si_stack;
495	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	466	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496		467
…		…
517		488
518	New(54,PL_savestack,96,ANY);	489	New(54,PL_savestack,96,ANY);
519	PL_savestack_ix = 0;	490	PL_savestack_ix = 0;
520	PL_savestack_max = 96;	491	PL_savestack_max = 96;
521		492
		493	#if !PERL_VERSION_ATLEAST (5,9,0)
522	New(54,PL_retstack,8,OP*);	494	New(54,PL_retstack,8,OP*);
523	PL_retstack_ix = 0;	495	PL_retstack_ix = 0;
524	PL_retstack_max = 8;	496	PL_retstack_max = 8;
525		497	#endif
526	UNLOCK;
527	}	498	}
528		499
529	/*	500	/*
530	* destroy the stacks, the callchain etc...	501	* destroy the stacks, the callchain etc...
531	*/	502	*/
532	STATIC void	503	static void
533	destroy_stacks(pTHX)	504	coro_destroy_stacks()
534	{	505	{
535	if (!IN_DESTRUCT)	506	if (!IN_DESTRUCT)
536	{	507	{
537	/* is this ugly, I ask? */	508	/* is this ugly, I ask? */
538	LEAVE_SCOPE (0);	509	LEAVE_SCOPE (0);
…		…
569		540
570	Safefree (PL_tmps_stack);	541	Safefree (PL_tmps_stack);
571	Safefree (PL_markstack);	542	Safefree (PL_markstack);
572	Safefree (PL_scopestack);	543	Safefree (PL_scopestack);
573	Safefree (PL_savestack);	544	Safefree (PL_savestack);
		545	#if !PERL_VERSION_ATLEAST (5,9,0)
574	Safefree (PL_retstack);	546	Safefree (PL_retstack);
575	}
576
577	static void
578	allocate_stack (Coro__State ctx, int alloc)
579	{
580	coro_stack *stack;
581
582	New (0, stack, 1, coro_stack);
583
584	stack->refcnt = 1;
585	stack->usecnt = 1;
586	stack->gencnt = ctx->gencnt = 0;
587
588	if (alloc)
589	{
590	#if HAVE_MMAP
591	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
592	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
593	if (stack->sptr == (void *)-1)
594	#endif	547	#endif
595	{
596	/*FIXME*//*D*//* reasonable stack size! */
597	stack->ssize = - (8192 * sizeof (long));
598	New (0, stack->sptr, 8192, long);
599	}
600	}
601	else
602	stack->sptr = 0;
603
604	ctx->stack = stack;
605	}	548	}
606		549
607	static void	550	static void
608	deallocate_stack (Coro__State ctx)	551	setup_coro (struct coro *coro)
609	{
610	coro_stack *stack = ctx->stack;
611
612	ctx->stack = 0;
613
614	if (stack)
615	{
616	if (!--stack->refcnt)
617	{
618	#ifdef HAVE_MMAP
619	if (stack->ssize > 0 && stack->sptr)
620	munmap (stack->sptr, stack->ssize);
621	else
622	#endif
623	Safefree (stack->sptr);
624
625	Safefree (stack);
626	}
627	else if (ctx->gencnt == stack->gencnt)
628	--stack->usecnt;
629	}
630	}
631
632	static void
633	setup_coro (void *arg)
634	{	552	{
635	/*	553	/*
636	* emulate part of the perl startup here.	554	* emulate part of the perl startup here.
637	*/	555	*/
638	dTHX;
639	dSP;
640	Coro__State ctx = (Coro__State)arg;
641	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
642		556
643	coro_init_stacks (aTHX);	557	coro_init_stacks ();
		558
644	/*PL_curcop = 0;*/	559	PL_curcop = 0;
645	/*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
646	SvREFCNT_dec (GvAV (PL_defgv));	570	SvREFCNT_dec (GvAV (PL_defgv));
647	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	571	GvAV (PL_defgv) = coro->args; coro->args = 0;
648		572
649	SPAGAIN;
650
651	if (ctx->stack)
652	{
653	ctx->cursp = 0;
654
655	PUSHMARK(SP);
656	PUTBACK;
657	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
658
659	if (SvTRUE (ERRSV))
660	croak (NULL);
661	else
662	croak ("FATAL: CCTXT coroutine returned!");
663	}
664	else
665	{
666	UNOP myop;
667
668	PL_op = (OP *)&myop;
669
670	Zero(&myop, 1, UNOP);	573	Zero (&myop, 1, LOGOP);
671	myop.op_next = Nullop;	574	myop.op_next = Nullop;
672	myop.op_flags = OPf_WANT_VOID;	575	myop.op_flags = OPf_WANT_VOID;
673		576
		577	PL_op = (OP *)&myop;
		578
674	PUSHMARK(SP);	579	PUSHMARK (SP);
675	XPUSHs (sub_init);	580	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
676	/*
677	* the next line is slightly wrong, as PL_op->op_next
678	* is actually being executed so we skip the first op.
679	* that doesn't matter, though, since it is only
680	* pp_nextstate and we never return...
681	* ah yes, and I don't care anyways ;)
682	*/
683	PUTBACK;	581	PUTBACK;
684	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	582	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685	SPAGAIN;	583	SPAGAIN;
686		584
687	ENTER; /* necessary e.g. for dounwind */	585	ENTER; /* necessary e.g. for dounwind */
688	}	586	}
689	}	587	}
690		588
691	static void	589	static void
692	continue_coro (void *arg)	590	free_coro_mortal ()
693	{	591	{
694	/*
695	* this is a _very_ stripped down perl interpreter ;)
696	*/
697	dTHX;
698	Coro__State ctx = (Coro__State)arg;
699	JMPENV coro_start_env;
700
701	PL_top_env = &ctx->start_env;
702
703	ctx->cursp = 0;
704	PL_op = PL_op->op_next;
705	CALLRUNOPS(aTHX);
706
707	abort ();
708	}
709
710	STATIC void
711	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
712	{
713	dSTACKLEVEL;
714
715	if (prev != next)
716	{
717	if (next->mainstack)
718	{
719	LOCK;
720	SAVE (prev, flags);
721	LOAD (next);
722	UNLOCK;
723
724	/* mark this state as in-use */
725	next->mainstack = 0;
726	next->tmps_ix = -2;
727
728	/* stacklevel changed? if yes, grab the stack for us! */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733	else if (prev->cursp != stacklevel
734	&& prev->stack->usecnt > 1)
735	{
736	prev->gencnt = ++prev->stack->gencnt;
737	prev->stack->usecnt = 1;
738	}
739
740	/* has our stack been invalidated? */
741	if (next->stack && next->stack->gencnt != next->gencnt)
742	{
743	deallocate_stack (next);
744	allocate_stack (next, 1);
745	coro_create (&(next->stack->cctx),
746	continue_coro, (void *)next,
747	next->stack->sptr, labs (next->stack->ssize));
748	}
749
750	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751	prev->cursp = stacklevel;
752	/* don't add any code here */
753	}
754	else
755	next->cursp = stacklevel;
756	}
757	else if (next->tmps_ix == -2)
758	croak ("tried to transfer to running coroutine");
759	else
760	{
761	LOCK;
762	SAVE (prev, -1); /* first get rid of the old state */
763	UNLOCK;
764
765	if (flags & TRANSFER_SAVE_CCTXT)
766	{
767	if (!prev->stack)
768	allocate_stack (prev, 0);
769
770	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
771	{
772	PL_top_env = &next->start_env;
773
774	setup_coro (next);
775	next->cursp = stacklevel;
776
777	prev->stack->refcnt++;
778	prev->stack->usecnt++;
779	next->stack = prev->stack;
780	next->gencnt = prev->gencnt;
781	}
782	else
783	{
784	assert (!next->stack);
785	allocate_stack (next, 1);
786	coro_create (&(next->stack->cctx),
787	setup_coro, (void *)next,
788	next->stack->sptr, labs (next->stack->ssize));
789	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
790	prev->cursp = stacklevel;
791	/* don't add any code here */
792	}
793	}
794	else
795	{
796	setup_coro (next);
797	next->cursp = stacklevel;
798	}
799	}
800	}
801
802	LOCK;
803	if (coro_mortal)	592	if (coro_mortal)
804	{	593	{
805	SvREFCNT_dec (coro_mortal);	594	SvREFCNT_dec (coro_mortal);
806	coro_mortal = 0;	595	coro_mortal = 0;
807	}	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() */
808	UNLOCK;	622	UNLOCK;
809	}
810		623
811	#define SV_CORO(sv,func) \	624	/*
812	do { \	625	* this is a _very_ stripped down perl interpreter ;)
813	if (SvROK (sv)) \	626	*/
814	sv = SvRV (sv); \	627	PL_top_env = &PL_start_env;
815	\	628	/* inject call to cctx_init */
816	if (SvTYPE (sv) == SVt_PVHV) \	629	prepare_cctx ((coro_stack *)arg);
817	{ \
818	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
819	\
820	if (!he) \
821	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
822	\
823	(sv) = SvRV (HeVAL(he)); \
824	} \
825	\
826	/* must also be changed inside Coro::Cont::yield */ \
827	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
828	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
829	\
830	} while(0)
831		630
832	#define SvSTATE(sv) (struct coro *)SvIV (sv)	631	/* somebody will hit me for both perl_run and PL_restartop */
		632	perl_run (PL_curinterp);
833		633
		634	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\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
834	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
835	api_transfer(pTHX_ SV *prev, SV *next, int flags)	894	api_transfer (SV *prev, SV *next, int flags)
836	{	895	{
837	SV_CORO (prev, "Coro::transfer");	896	dTHX;
838	SV_CORO (next, "Coro::transfer");	897	struct transfer_args ta;
839		898
840	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	899	prepare_transfer (&ta, prev, next, flags);
		900	TRANSFER (ta);
841	}	901	}
842		902
843	/** Coro ********************************************************************/	903	/** Coro ********************************************************************/
844		904
845	#define PRIO_MAX 3	905	#define PRIO_MAX 3
…		…
849	#define PRIO_IDLE -3	909	#define PRIO_IDLE -3
850	#define PRIO_MIN -4	910	#define PRIO_MIN -4
851		911
852	/* for Coro.pm */	912	/* for Coro.pm */
853	static GV *coro_current, *coro_idle;	913	static GV *coro_current, *coro_idle;
854	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	914	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
855	static int coro_nready;	915	static int coro_nready;
856		916
857	static void	917	static void
858	coro_enq (pTHX_ SV *sv)	918	coro_enq (SV *sv)
859	{	919	{
		920	int prio;
		921
860	if (SvTYPE (sv) == SVt_PVHV)	922	if (SvTYPE (sv) != SVt_PVHV)
861	{
862	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
863	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
864
865	prio = prio > PRIO_MAX ? PRIO_MAX
866	: prio < PRIO_MIN ? PRIO_MIN
867	: prio;
868
869	av_push (coro_ready [prio - PRIO_MIN], sv);
870	coro_nready++;
871
872	return;
873	}
874
875	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");
		924
		925	prio = SvSTATE (sv)->prio;
		926
		927	av_push (coro_ready [prio - PRIO_MIN], sv);
		928	coro_nready++;
876	}	929	}
877		930
878	static SV *	931	static SV *
879	coro_deq (pTHX_ int min_prio)	932	coro_deq (int min_prio)
880	{	933	{
881	int prio = PRIO_MAX - PRIO_MIN;	934	int prio = PRIO_MAX - PRIO_MIN;
882		935
883	min_prio -= PRIO_MIN;	936	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	937	if (min_prio < 0)
885	min_prio = 0;	938	min_prio = 0;
886		939
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	940	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (av_len (coro_ready[prio]) >= 0)	941	if (AvFILLp (coro_ready [prio]) >= 0)
889	{	942	{
890	coro_nready--;	943	coro_nready--;
891	return av_shift (coro_ready[prio]);	944	return av_shift (coro_ready [prio]);
892	}	945	}
893		946
894	return 0;	947	return 0;
895	}	948	}
896		949
…		…
901		954
902	if (SvROK (coro))	955	if (SvROK (coro))
903	coro = SvRV (coro);	956	coro = SvRV (coro);
904		957
905	LOCK;	958	LOCK;
906	coro_enq (aTHX_ SvREFCNT_inc (coro));	959	coro_enq (SvREFCNT_inc (coro));
907	UNLOCK;	960	UNLOCK;
908	}	961	}
909		962
910	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
911	api_schedule (void)	1019	api_schedule (void)
912	{	1020	{
913	dTHX;	1021	dTHX;
		1022	struct transfer_args ta;
914		1023
915	SV *prev, *next;	1024	prepare_schedule (&ta);
916		1025	TRANSFER (ta);
917	LOCK;
918
919	prev = SvRV (GvSV (coro_current));
920	next = coro_deq (aTHX_ PRIO_MIN);
921
922	if (!next)
923	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
924
925	/* free this only after the transfer */
926	coro_mortal = prev;
927	SV_CORO (prev, "Coro::schedule");
928
929	SvRV (GvSV (coro_current)) = next;
930
931	SV_CORO (next, "Coro::schedule");
932
933	UNLOCK;
934
935	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
936	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
937	}	1026	}
938		1027
939	static void	1028	static void
940	api_cede (void)	1029	api_cede (void)
941	{	1030	{
942	dTHX;	1031	dTHX;
		1032	struct transfer_args ta;
943		1033
944	LOCK;	1034	prepare_cede (&ta);
945	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1035	TRANSFER (ta);
946	UNLOCK;
947
948	api_schedule ();
949	}	1036	}
950		1037
951	MODULE = Coro::State PACKAGE = Coro::State	1038	MODULE = Coro::State PACKAGE = Coro::State
952		1039
953	PROTOTYPES: ENABLE	1040	PROTOTYPES: DISABLE
954		1041
955	BOOT:	1042	BOOT:
956	{ /* {} necessary for stoopid perl-5.6.x */	1043	{
957	#ifdef USE_ITHREADS	1044	#ifdef USE_ITHREADS
958	MUTEX_INIT (&coro_mutex);	1045	MUTEX_INIT (&coro_mutex);
959	#endif	1046	#endif
		1047	BOOT_PAGESIZE;
960		1048
961	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
962	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
963	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1049	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964		1050
965	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1051	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
966	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1052	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
967	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1053	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
968	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
969		1054
970	main_mainstack = PL_mainstack;	1055	main_mainstack = PL_mainstack;
971		1056
972	coroapi.ver = CORO_API_VERSION;	1057	coroapi.ver = CORO_API_VERSION;
973	coroapi.transfer = api_transfer;	1058	coroapi.transfer = api_transfer;
974	}
975		1059
976	Coro::State	1060	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
977	_newprocess(args)	1061	}
978	SV * args	1062
979	PROTOTYPE: $	1063	SV *
		1064	new (char *klass, ...)
980	CODE:	1065	CODE:
981	Coro__State coro;	1066	{
		1067	struct coro *coro;
		1068	HV *hv;
		1069	int i;
982		1070
983	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
984	croak ("Coro::State::_newprocess expects an arrayref");
985
986	Newz (0, coro, 1, struct coro);	1071	Newz (0, coro, 1, struct coro);
		1072	coro->args = newAV ();
987		1073
988	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
989	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1081	/*coro->mainstack = 0; *//*actual work is done inside transfer */
990	/*coro->stack = 0;*/	1082	/*coro->stack = 0;*/
991		1083	}
992	/* same as JMPENV_BOOTSTRAP */
993	/* we might be able to recycle start_env, but safe is safe */
994	/*Zero(&coro->start_env, 1, JMPENV);*/
995	coro->start_env.je_ret = -1;
996	coro->start_env.je_mustcatch = TRUE;
997
998	RETVAL = coro;
999	OUTPUT:	1084	OUTPUT:
1000	RETVAL	1085	RETVAL
1001		1086
1002	void	1087	void
1003	transfer(prev, next, flags)	1088	_set_stacklevel (...)
1004	SV *prev	1089	ALIAS:
1005	SV *next	1090	Coro::State::transfer = 1
1006	int flags	1091	Coro::schedule = 2
1007	PROTOTYPE: @	1092	Coro::cede = 3
		1093	Coro::Cont::yield = 4
1008	CODE:	1094	CODE:
1009	PUTBACK;	1095	{
1010	SV_CORO (next, "Coro::transfer");	1096	struct transfer_args ta;
1011	SV_CORO (prev, "Coro::transfer");	1097
1012	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1098	switch (ix)
1013	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	}
1014		1151
1015	void	1152	void
1016	DESTROY(coro)	1153	_clone_state_from (SV *dst, SV *src)
1017	Coro::State coro	1154	CODE:
1018	CODE:	1155	{
		1156	struct coro *coro_src = SvSTATE (src);
1019		1157
1020	if (coro->mainstack && coro->mainstack != main_mainstack)	1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1021	{
1022	struct coro temp;
1023		1159
1024	PUTBACK;	1160	++coro_src->refcnt;
1025	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;
1026	LOAD (aTHX_ coro);	1162	}
1027	SPAGAIN;
1028
1029	destroy_stacks (aTHX);
1030
1031	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1032	SPAGAIN;
1033
1034	coro->mainstack = 0;
1035	}
1036
1037	deallocate_stack (coro);
1038	SvREFCNT_dec (coro->args);
1039	Safefree (coro);
1040		1163
1041	void	1164	void
1042	_exit(code)	1165	_exit (code)
1043	int code	1166	int code
1044	PROTOTYPE: $	1167	PROTOTYPE: $
1045	CODE:	1168	CODE:
1046	_exit (code);	1169	_exit (code);
1047		1170
1048	MODULE = Coro::State PACKAGE = Coro::Cont
1049
1050	# this is slightly dirty (should expose a c-level api)
1051
1052	void
1053	yield(...)
1054	PROTOTYPE: @
1055	CODE:
1056	static SV *returnstk;
1057	SV *sv;
1058	AV *defav = GvAV (PL_defgv);
1059	struct coro *prev, *next;
1060
1061	if (!returnstk)
1062	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1063
1064	/* set up @_ -- ugly */
1065	av_clear (defav);
1066	av_fill (defav, items - 1);
1067	while (items--)
1068	av_store (defav, items, SvREFCNT_inc (ST(items)));
1069
1070	SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1071	sv = av_pop ((AV *)SvRV (returnstk));
1072	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1073	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1074	SvREFCNT_dec (sv);
1075
1076	transfer (aTHX_ prev, next, 0);
1077
1078	MODULE = Coro::State PACKAGE = Coro	1171	MODULE = Coro::State PACKAGE = Coro
1079		1172
1080	# this is slightly dirty (should expose a c-level api)
1081
1082	BOOT:	1173	BOOT:
1083	{	1174	{
1084	int i;	1175	int i;
		1176
1085	HV *stash = gv_stashpv ("Coro", TRUE);	1177	coro_stash = gv_stashpv ("Coro", TRUE);
1086		1178
1087	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1179	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1088	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1180	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1089	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1181	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1090	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1182	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1091	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1183	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1092	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1184	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1093		1185
1094	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1186	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1095	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1187	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1096		1188
1097	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1189	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1105	coroapi.ready = api_ready;	1197	coroapi.ready = api_ready;
1106	coroapi.nready = &coro_nready;	1198	coroapi.nready = &coro_nready;
1107	coroapi.current = coro_current;	1199	coroapi.current = coro_current;
1108		1200
1109	GCoroAPI = &coroapi;	1201	GCoroAPI = &coroapi;
1110	sv_setiv(sv, (IV)&coroapi);	1202	sv_setiv (sv, (IV)&coroapi);
1111	SvREADONLY_on(sv);	1203	SvREADONLY_on (sv);
1112	}	1204	}
1113	}	1205	}
1114		1206
1115	#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	}
1116		1226
1117	void	1227	void
1118	ready(self)	1228	ready (SV *self)
1119	SV * self
1120	PROTOTYPE: $	1229	PROTOTYPE: $
1121	CODE:	1230	CODE:
1122	api_ready (self);	1231	api_ready (self);
1123		1232
1124	#endif
1125
1126	int	1233	int
1127	nready(...)	1234	nready (...)
1128	PROTOTYPE:	1235	PROTOTYPE:
1129	CODE:	1236	CODE:
1130	RETVAL = coro_nready;	1237	RETVAL = coro_nready;
1131	OUTPUT:	1238	OUTPUT:
1132	RETVAL	1239	RETVAL
1133		1240
		1241	MODULE = Coro::State PACKAGE = Coro::AIO
		1242
		1243	SV *
		1244	_get_state ()
		1245	CODE:
		1246	{
		1247	struct {
		1248	int errorno;
		1249	int laststype;
		1250	int laststatval;
		1251	Stat_t statcache;
		1252	} data;
		1253
		1254	data.errorno = errno;
		1255	data.laststype = PL_laststype;
		1256	data.laststatval = PL_laststatval;
		1257	data.statcache = PL_statcache;
		1258
		1259	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1260	}
		1261	OUTPUT:
		1262	RETVAL
		1263
1134	void	1264	void
1135	schedule(...)	1265	_set_state (char *data_)
1136	PROTOTYPE:	1266	PROTOTYPE: $
1137	CODE:	1267	CODE:
1138	api_schedule ();	1268	{
		1269	struct {
		1270	int errorno;
		1271	int laststype;
		1272	int laststatval;
		1273	Stat_t statcache;
		1274	} *data = (void *)data_;
1139		1275
1140	void	1276	errno = data->errorno;
1141	cede(...)	1277	PL_laststype = data->laststype;
1142	PROTOTYPE:	1278	PL_laststatval = data->laststatval;
1143	CODE:	1279	PL_statcache = data->statcache;
1144	api_cede ();	1280	}
1145

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