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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.61 by root, Tue Aug 10 01:56:30 2004 UTC vs.
Revision 1.106 by root, Mon Nov 27 02:08:55 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 (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)
64	#else	98	#else
65	# define LOCK 0	99	# define LOCK (void)0
66	# define UNLOCK 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	/* this is a structure representing a c-level coroutine */
77	typedef struct {	109	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	110	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		111
82	coro_context cctx;	112	/* the stack */
83
84	void *sptr;	113	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	114	long ssize; /* positive == mmap, otherwise malloc */
86	} coro_stack;
87		115
		116	/* cpu state */
		117	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		118	JMPENV *top_env;
		119	coro_context cctx;
		120
		121	#if USE_VALGRIND
		122	int valgrind_id;
		123	#endif
		124	} coro_cctx;
		125
		126	/* this is a structure representing a perl-level coroutine */
88	struct coro {	127	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	128	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	129	coro_cctx *cctx;
91		130
92	/* the optional C context */	131	/* data associated with this coroutine (initial args) */
93	coro_stack *stack;	132	AV *args;
94	void *cursp;
95	int gencnt;	133	int refcnt;
96		134
97	/* optionally saved, might be zero */	135	/* optionally saved, might be zero */
98	AV *defav;	136	AV *defav;
99	SV *defsv;	137	SV *defsv;
100	SV *errsv;	138	SV *errsv;
…		…
109	AV *mainstack;	147	AV *mainstack;
110	SV **stack_sp;	148	SV **stack_sp;
111	OP *op;	149	OP *op;
112	SV **curpad;	150	SV **curpad;
113	AV *comppad;	151	AV *comppad;
		152	CV *compcv;
114	SV **stack_base;	153	SV **stack_base;
115	SV **stack_max;	154	SV **stack_max;
116	SV **tmps_stack;	155	SV **tmps_stack;
117	I32 tmps_floor;	156	I32 tmps_floor;
118	I32 tmps_ix;	157	I32 tmps_ix;
…		…
127	I32 savestack_ix;	166	I32 savestack_ix;
128	I32 savestack_max;	167	I32 savestack_max;
129	OP **retstack;	168	OP **retstack;
130	I32 retstack_ix;	169	I32 retstack_ix;
131	I32 retstack_max;	170	I32 retstack_max;
		171	PMOP *curpm;
132	COP *curcop;	172	COP *curcop;
133	JMPENV *top_env;
134		173
135	/* data associated with this coroutine (initial args) */	174	/* coro process data */
136	AV *args;	175	int prio;
137	};	176	};
138		177
139	typedef struct coro *Coro__State;	178	typedef struct coro *Coro__State;
140	typedef struct coro *Coro__State_or_hashref;	179	typedef struct coro *Coro__State_or_hashref;
141		180
142	/* mostly copied from op.c:cv_clone2 */	181	static AV *
143	STATIC AV *	182	coro_clone_padlist (CV *cv)
144	clone_padlist (pTHX_ AV *protopadlist)
145	{	183	{
146	AV *av;	184	AV *padlist = CvPADLIST (cv);
147	I32 ix;
148	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
149	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
150	SV **pname = AvARRAY (protopad_name);
151	SV **ppad = AvARRAY (protopad);
152	I32 fname = AvFILLp (protopad_name);
153	I32 fpad = AvFILLp (protopad);
154	AV *newpadlist, *newpad_name, *newpad;	185	AV *newpadlist, *newpad;
155	SV **npad;
156
157	newpad_name = newAV ();
158	for (ix = fname; ix >= 0; ix--)
159	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161	newpad = newAV ();
162	av_fill (newpad, AvFILLp (protopad));
163	npad = AvARRAY (newpad);
164		186
165	newpadlist = newAV ();	187	newpadlist = newAV ();
166	AvREAL_off (newpadlist);	188	AvREAL_off (newpadlist);
167	av_store (newpadlist, 0, (SV *) newpad_name);	189	#if PERL_VERSION_ATLEAST (5,9,0)
		190	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		191	#else
		192	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		193	#endif
		194	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		195	--AvFILLp (padlist);
		196
		197	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
168	av_store (newpadlist, 1, (SV *) newpad);	198	av_store (newpadlist, 1, (SV *)newpad);
169
170	av = newAV (); /* will be @_ */
171	av_extend (av, 0);
172	av_store (newpad, 0, (SV *) av);
173	AvFLAGS (av) = AVf_REIFY;
174
175	for (ix = fpad; ix > 0; ix--)
176	{
177	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
178
179	if (namesv && namesv != &PL_sv_undef)
180	{
181	char *name = SvPVX (namesv); /* XXX */
182
183	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
184	{ /* lexical from outside? */
185	npad[ix] = SvREFCNT_inc (ppad[ix]);
186	}
187	else
188	{ /* our own lexical */
189	SV *sv;
190	if (*name == '&')
191	sv = SvREFCNT_inc (ppad[ix]);
192	else if (*name == '@')
193	sv = (SV *) newAV ();
194	else if (*name == '%')
195	sv = (SV *) newHV ();
196	else
197	sv = NEWSV (0, 0);
198
199	#ifdef SvPADBUSY
200	if (!SvPADBUSY (sv))
201	#endif
202	SvPADMY_on (sv);
203
204	npad[ix] = sv;
205	}
206	}
207	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
208	{
209	npad[ix] = SvREFCNT_inc (ppad[ix]);
210	}
211	else
212	{
213	SV *sv = NEWSV (0, 0);
214	SvPADTMP_on (sv);
215	npad[ix] = sv;
216	}
217	}
218
219	#if 0 /* return -ENOTUNDERSTOOD */
220	/* Now that vars are all in place, clone nested closures. */
221
222	for (ix = fpad; ix > 0; ix--) {
223	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224	if (namesv
225	&& namesv != &PL_sv_undef
226	&& !(SvFLAGS(namesv) & SVf_FAKE)
227	&& *SvPVX(namesv) == '&'
228	&& CvCLONE(ppad[ix]))
229	{
230	CV *kid = cv_clone((CV*)ppad[ix]);
231	SvREFCNT_dec(ppad[ix]);
232	CvCLONE_on(kid);
233	SvPADMY_on(kid);
234	npad[ix] = (SV*)kid;
235	}
236	}
237	#endif
238		199
239	return newpadlist;	200	return newpadlist;
240	}	201	}
241		202
242	STATIC void	203	static void
243	free_padlist (pTHX_ AV *padlist)	204	free_padlist (AV *padlist)
244	{	205	{
245	/* may be during global destruction */	206	/* may be during global destruction */
246	if (SvREFCNT (padlist))	207	if (SvREFCNT (padlist))
247	{	208	{
248	I32 i = AvFILLp (padlist);	209	I32 i = AvFILLp (padlist);
…		…
261		222
262	SvREFCNT_dec ((SV*)padlist);	223	SvREFCNT_dec ((SV*)padlist);
263	}	224	}
264	}	225	}
265		226
266	STATIC int	227	static int
267	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	228	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268	{	229	{
269	AV *padlist;	230	AV *padlist;
270	AV *av = (AV *)mg->mg_obj;	231	AV *av = (AV *)mg->mg_obj;
271		232
272	/* casting is fun. */	233	/* casting is fun. */
273	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	234	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274	free_padlist (aTHX_ padlist);	235	free_padlist (padlist);
275		236
276	SvREFCNT_dec (av);	237	SvREFCNT_dec (av);
		238
		239	return 0;
277	}	240	}
278		241
279	#define PERL_MAGIC_coro PERL_MAGIC_ext	242	#define PERL_MAGIC_coro PERL_MAGIC_ext
280		243
281	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	244	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
282		245
283	/* the next two functions merely cache the padlists */	246	/* the next two functions merely cache the padlists */
284	STATIC void	247	static void
285	get_padlist (pTHX_ CV *cv)	248	get_padlist (CV *cv)
286	{	249	{
287	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	250	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
288		251
289	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	252	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
290	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	253	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
291	else	254	else
		255	{
		256	#if 0
		257	/* this is probably cleaner, but also slower? */
		258	CV *cp = Perl_cv_clone (cv);
		259	CvPADLIST (cv) = CvPADLIST (cp);
		260	CvPADLIST (cp) = 0;
		261	SvREFCNT_dec (cp);
		262	#else
292	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	263	CvPADLIST (cv) = coro_clone_padlist (cv);
		264	#endif
		265	}
293	}	266	}
294		267
295	STATIC void	268	static void
296	put_padlist (pTHX_ CV *cv)	269	put_padlist (CV *cv)
297	{	270	{
298	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	271	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
299		272
300	if (!mg)	273	if (!mg)
301	{	274	{
…		…
309	}	282	}
310		283
311	#define SB do {	284	#define SB do {
312	#define SE } while (0)	285	#define SE } while (0)
313		286
314	#define LOAD(state) load_state(aTHX_ (state));	287	#define LOAD(state) load_state((state));
315	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	288	#define SAVE(state,flags) save_state((state),(flags));
316		289
317	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	290	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
318		291
319	static void	292	static void
320	load_state(pTHX_ Coro__State c)	293	load_state(Coro__State c)
321	{	294	{
322	PL_dowarn = c->dowarn;	295	PL_dowarn = c->dowarn;
323	PL_in_eval = c->in_eval;	296	PL_in_eval = c->in_eval;
324		297
325	PL_curstackinfo = c->curstackinfo;	298	PL_curstackinfo = c->curstackinfo;
…		…
327	PL_mainstack = c->mainstack;	300	PL_mainstack = c->mainstack;
328	PL_stack_sp = c->stack_sp;	301	PL_stack_sp = c->stack_sp;
329	PL_op = c->op;	302	PL_op = c->op;
330	PL_curpad = c->curpad;	303	PL_curpad = c->curpad;
331	PL_comppad = c->comppad;	304	PL_comppad = c->comppad;
		305	PL_compcv = c->compcv;
332	PL_stack_base = c->stack_base;	306	PL_stack_base = c->stack_base;
333	PL_stack_max = c->stack_max;	307	PL_stack_max = c->stack_max;
334	PL_tmps_stack = c->tmps_stack;	308	PL_tmps_stack = c->tmps_stack;
335	PL_tmps_floor = c->tmps_floor;	309	PL_tmps_floor = c->tmps_floor;
336	PL_tmps_ix = c->tmps_ix;	310	PL_tmps_ix = c->tmps_ix;
…		…
342	PL_scopestack_ix = c->scopestack_ix;	316	PL_scopestack_ix = c->scopestack_ix;
343	PL_scopestack_max = c->scopestack_max;	317	PL_scopestack_max = c->scopestack_max;
344	PL_savestack = c->savestack;	318	PL_savestack = c->savestack;
345	PL_savestack_ix = c->savestack_ix;	319	PL_savestack_ix = c->savestack_ix;
346	PL_savestack_max = c->savestack_max;	320	PL_savestack_max = c->savestack_max;
		321	#if !PERL_VERSION_ATLEAST (5,9,0)
347	PL_retstack = c->retstack;	322	PL_retstack = c->retstack;
348	PL_retstack_ix = c->retstack_ix;	323	PL_retstack_ix = c->retstack_ix;
349	PL_retstack_max = c->retstack_max;	324	PL_retstack_max = c->retstack_max;
		325	#endif
		326	PL_curpm = c->curpm;
350	PL_curcop = c->curcop;	327	PL_curcop = c->curcop;
351	PL_top_env = c->top_env;
352		328
353	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	329	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
354	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	330	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
355	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	331	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
356		332
…		…
363	{	339	{
364	AV *padlist = (AV *)POPs;	340	AV *padlist = (AV *)POPs;
365		341
366	if (padlist)	342	if (padlist)
367	{	343	{
368	put_padlist (aTHX_ cv); /* mark this padlist as available */	344	put_padlist (cv); /* mark this padlist as available */
369	CvPADLIST(cv) = padlist;	345	CvPADLIST(cv) = padlist;
370	}	346	}
371		347
372	++CvDEPTH(cv);	348	++CvDEPTH(cv);
373	}	349	}
…		…
375	PUTBACK;	351	PUTBACK;
376	}	352	}
377	}	353	}
378		354
379	static void	355	static void
380	save_state(pTHX_ Coro__State c, int flags)	356	save_state(Coro__State c, int flags)
381	{	357	{
382	{	358	{
383	dSP;	359	dSP;
384	I32 cxix = cxstack_ix;	360	I32 cxix = cxstack_ix;
385	PERL_CONTEXT *ccstk = cxstack;	361	PERL_CONTEXT *ccstk = cxstack;
…		…
413	}	389	}
414		390
415	PUSHs ((SV *)CvPADLIST(cv));	391	PUSHs ((SV *)CvPADLIST(cv));
416	PUSHs ((SV *)cv);	392	PUSHs ((SV *)cv);
417		393
418	get_padlist (aTHX_ cv); /* this is a monster */	394	get_padlist (cv);
419	}	395	}
420	}	396	}
421	#ifdef CXt_FORMAT	397	#ifdef CXt_FORMAT
422	else if (CxTYPE(cx) == CXt_FORMAT)	398	else if (CxTYPE(cx) == CXt_FORMAT)
423	{	399	{
…		…
451	c->mainstack = PL_mainstack;	427	c->mainstack = PL_mainstack;
452	c->stack_sp = PL_stack_sp;	428	c->stack_sp = PL_stack_sp;
453	c->op = PL_op;	429	c->op = PL_op;
454	c->curpad = PL_curpad;	430	c->curpad = PL_curpad;
455	c->comppad = PL_comppad;	431	c->comppad = PL_comppad;
		432	c->compcv = PL_compcv;
456	c->stack_base = PL_stack_base;	433	c->stack_base = PL_stack_base;
457	c->stack_max = PL_stack_max;	434	c->stack_max = PL_stack_max;
458	c->tmps_stack = PL_tmps_stack;	435	c->tmps_stack = PL_tmps_stack;
459	c->tmps_floor = PL_tmps_floor;	436	c->tmps_floor = PL_tmps_floor;
460	c->tmps_ix = PL_tmps_ix;	437	c->tmps_ix = PL_tmps_ix;
…		…
466	c->scopestack_ix = PL_scopestack_ix;	443	c->scopestack_ix = PL_scopestack_ix;
467	c->scopestack_max = PL_scopestack_max;	444	c->scopestack_max = PL_scopestack_max;
468	c->savestack = PL_savestack;	445	c->savestack = PL_savestack;
469	c->savestack_ix = PL_savestack_ix;	446	c->savestack_ix = PL_savestack_ix;
470	c->savestack_max = PL_savestack_max;	447	c->savestack_max = PL_savestack_max;
		448	#if !PERL_VERSION_ATLEAST (5,9,0)
471	c->retstack = PL_retstack;	449	c->retstack = PL_retstack;
472	c->retstack_ix = PL_retstack_ix;	450	c->retstack_ix = PL_retstack_ix;
473	c->retstack_max = PL_retstack_max;	451	c->retstack_max = PL_retstack_max;
		452	#endif
		453	c->curpm = PL_curpm;
474	c->curcop = PL_curcop;	454	c->curcop = PL_curcop;
475	c->top_env = PL_top_env;
476	}	455	}
477		456
478	/*	457	/*
479	* allocate various perl stacks. This is an exact copy	458	* allocate various perl stacks. This is an exact copy
480	* of perl.c:init_stacks, except that it uses less memory	459	* of perl.c:init_stacks, except that it uses less memory
481	* on the (sometimes correct) assumption that coroutines do	460	* on the (sometimes correct) assumption that coroutines do
482	* not usually need a lot of stackspace.	461	* not usually need a lot of stackspace.
483	*/	462	*/
484	STATIC void	463	static void
485	coro_init_stacks (pTHX)	464	coro_init_stacks ()
486	{	465	{
487	LOCK;
488
489	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	466	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
490	PL_curstackinfo->si_type = PERLSI_MAIN;	467	PL_curstackinfo->si_type = PERLSI_MAIN;
491	PL_curstack = PL_curstackinfo->si_stack;	468	PL_curstack = PL_curstackinfo->si_stack;
492	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	469	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
493		470
…		…
514		491
515	New(54,PL_savestack,96,ANY);	492	New(54,PL_savestack,96,ANY);
516	PL_savestack_ix = 0;	493	PL_savestack_ix = 0;
517	PL_savestack_max = 96;	494	PL_savestack_max = 96;
518		495
		496	#if !PERL_VERSION_ATLEAST (5,9,0)
519	New(54,PL_retstack,8,OP*);	497	New(54,PL_retstack,8,OP*);
520	PL_retstack_ix = 0;	498	PL_retstack_ix = 0;
521	PL_retstack_max = 8;	499	PL_retstack_max = 8;
522		500	#endif
523	UNLOCK;
524	}	501	}
525		502
526	/*	503	/*
527	* destroy the stacks, the callchain etc...	504	* destroy the stacks, the callchain etc...
528	*/	505	*/
529	STATIC void	506	static void
530	destroy_stacks(pTHX)	507	coro_destroy_stacks ()
531	{	508	{
532	if (!IN_DESTRUCT)	509	if (!IN_DESTRUCT)
533	{	510	{
534	/* is this ugly, I ask? */	511	/* is this ugly, I ask? */
535	LEAVE_SCOPE (0);	512	LEAVE_SCOPE (0);
…		…
566		543
567	Safefree (PL_tmps_stack);	544	Safefree (PL_tmps_stack);
568	Safefree (PL_markstack);	545	Safefree (PL_markstack);
569	Safefree (PL_scopestack);	546	Safefree (PL_scopestack);
570	Safefree (PL_savestack);	547	Safefree (PL_savestack);
		548	#if !PERL_VERSION_ATLEAST (5,9,0)
571	Safefree (PL_retstack);	549	Safefree (PL_retstack);
572	}
573
574	static void
575	allocate_stack (Coro__State ctx, int alloc)
576	{
577	coro_stack *stack;
578
579	New (0, stack, 1, coro_stack);
580
581	stack->refcnt = 1;
582	stack->usecnt = 1;
583	stack->gencnt = ctx->gencnt = 0;
584
585	if (alloc)
586	{
587	#if HAVE_MMAP
588	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
589	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
590	if (stack->sptr == (void *)-1)
591	#endif	550	#endif
592	{
593	/*FIXME*//*D*//* reasonable stack size! */
594	stack->ssize = - (8192 * sizeof (long));
595	New (0, stack->sptr, 8192, long);
596	}
597	}
598	else
599	stack->sptr = 0;
600
601	ctx->stack = stack;
602	}	551	}
603		552
604	static void	553	static void
605	deallocate_stack (Coro__State ctx)	554	setup_coro (struct coro *coro)
606	{
607	coro_stack *stack = ctx->stack;
608
609	ctx->stack = 0;
610
611	if (stack)
612	{
613	if (!--stack->refcnt)
614	{
615	#ifdef HAVE_MMAP
616	if (stack->ssize > 0 && stack->sptr)
617	munmap (stack->sptr, stack->ssize);
618	else
619	#endif
620	Safefree (stack->sptr);
621
622	Safefree (stack);
623	}
624	else if (ctx->gencnt == stack->gencnt)
625	--stack->usecnt;
626	}
627	}
628
629	static void
630	setup_coro (void *arg)
631	{	555	{
632	/*	556	/*
633	* emulate part of the perl startup here.	557	* emulate part of the perl startup here.
634	*/	558	*/
635	dTHX;
636	dSP;
637	Coro__State ctx = (Coro__State)arg;
638	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
639		559
640	coro_init_stacks (aTHX);	560	coro_init_stacks ();
		561
641	/*PL_curcop = 0;*/	562	PL_curcop = 0;
642	/*PL_in_eval = PL_in_eval;*/ /* inherit */	563	PL_in_eval = 0;
		564	PL_curpm = 0;
		565
		566	{
		567	dSP;
		568	LOGOP myop;
		569
		570	/* I have no idea why this is needed, but it is */
		571	PUSHMARK (SP);
		572
643	SvREFCNT_dec (GvAV (PL_defgv));	573	SvREFCNT_dec (GvAV (PL_defgv));
644	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	574	GvAV (PL_defgv) = coro->args; coro->args = 0;
645		575
646	SPAGAIN;
647
648	if (ctx->stack)
649	{
650	ctx->cursp = 0;
651
652	PUSHMARK(SP);
653	PUTBACK;
654	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
655
656	if (SvTRUE (ERRSV))
657	croak (NULL);
658	else
659	croak ("FATAL: CCTXT coroutine returned!");
660	}
661	else
662	{
663	UNOP myop;
664
665	PL_op = (OP *)&myop;
666
667	Zero(&myop, 1, UNOP);	576	Zero (&myop, 1, LOGOP);
668	myop.op_next = Nullop;	577	myop.op_next = Nullop;
669	myop.op_flags = OPf_WANT_VOID;	578	myop.op_flags = OPf_WANT_VOID;
670		579
		580	PL_op = (OP *)&myop;
		581
671	PUSHMARK(SP);	582	PUSHMARK (SP);
672	XPUSHs (sub_init);	583	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
673	/*
674	* the next line is slightly wrong, as PL_op->op_next
675	* is actually being executed so we skip the first op.
676	* that doesn't matter, though, since it is only
677	* pp_nextstate and we never return...
678	* ah yes, and I don't care anyways ;)
679	*/
680	PUTBACK;	584	PUTBACK;
681	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	585	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
682	SPAGAIN;	586	SPAGAIN;
683		587
684	ENTER; /* necessary e.g. for dounwind */	588	ENTER; /* necessary e.g. for dounwind */
685	}	589	}
686	}	590	}
687		591
688	static void	592	static void
689	continue_coro (void *arg)	593	free_coro_mortal ()
690	{	594	{
691	/*
692	* this is a _very_ stripped down perl interpreter ;)
693	*/
694	dTHX;
695	Coro__State ctx = (Coro__State)arg;
696	JMPENV coro_start_env;
697
698	PL_top_env = &ctx->start_env;
699
700	ctx->cursp = 0;
701	PL_op = PL_op->op_next;
702	CALLRUNOPS(aTHX);
703
704	abort ();
705	}
706
707	STATIC void
708	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
709	{
710	dSTACKLEVEL;
711
712	if (prev != next)
713	{
714	if (next->mainstack)
715	{
716	LOCK;
717	SAVE (prev, flags);
718	LOAD (next);
719	UNLOCK;
720
721	/* mark this state as in-use */
722	next->mainstack = 0;
723	next->tmps_ix = -2;
724
725	/* stacklevel changed? if yes, grab the stack for us! */
726	if (flags & TRANSFER_SAVE_CCTXT)
727	{
728	if (!prev->stack)
729	allocate_stack (prev, 0);
730	else if (prev->cursp != stacklevel
731	&& prev->stack->usecnt > 1)
732	{
733	prev->gencnt = ++prev->stack->gencnt;
734	prev->stack->usecnt = 1;
735	}
736
737	/* has our stack been invalidated? */
738	if (next->stack && next->stack->gencnt != next->gencnt)
739	{
740	deallocate_stack (next);
741	allocate_stack (next, 1);
742	coro_create (&(next->stack->cctx),
743	continue_coro, (void *)next,
744	next->stack->sptr, labs (next->stack->ssize));
745	}
746
747	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
748	prev->cursp = stacklevel;
749	/* don't add any code here */
750	}
751	else
752	next->cursp = stacklevel;
753	}
754	else if (next->tmps_ix == -2)
755	croak ("tried to transfer to running coroutine");
756	else
757	{
758	LOCK;
759	SAVE (prev, -1); /* first get rid of the old state */
760	UNLOCK;
761
762	if (flags & TRANSFER_SAVE_CCTXT)
763	{
764	if (!prev->stack)
765	allocate_stack (prev, 0);
766
767	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
768	{
769	PL_top_env = &next->start_env;
770
771	setup_coro (next);
772	next->cursp = stacklevel;
773
774	prev->stack->refcnt++;
775	prev->stack->usecnt++;
776	next->stack = prev->stack;
777	next->gencnt = prev->gencnt;
778	}
779	else
780	{
781	assert (!next->stack);
782	allocate_stack (next, 1);
783	coro_create (&(next->stack->cctx),
784	setup_coro, (void *)next,
785	next->stack->sptr, labs (next->stack->ssize));
786	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
787	prev->cursp = stacklevel;
788	/* don't add any code here */
789	}
790	}
791	else
792	{
793	setup_coro (next);
794	next->cursp = stacklevel;
795	}
796	}
797	}
798
799	LOCK;
800	if (coro_mortal)	595	if (coro_mortal)
801	{	596	{
802	SvREFCNT_dec (coro_mortal);	597	SvREFCNT_dec (coro_mortal);
803	coro_mortal = 0;	598	coro_mortal = 0;
804	}	599	}
		600	}
		601
		602	static void NOINLINE
		603	prepare_cctx (coro_cctx *cctx)
		604	{
		605	dSP;
		606	LOGOP myop;
		607
		608	Zero (&myop, 1, LOGOP);
		609	myop.op_next = PL_op;
		610	myop.op_flags = OPf_WANT_VOID;
		611
		612	sv_setiv (get_sv ("Coro::State::cctx", FALSE), PTR2IV (cctx));
		613
		614	PUSHMARK (SP);
		615	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
		616	PUTBACK;
		617	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		618	SPAGAIN;
		619	}
		620
		621	static void
		622	coro_run (void *arg)
		623	{
		624	/* coro_run is the alternative epilogue of transfer() */
805	UNLOCK;	625	UNLOCK;
806	}
807		626
808	#define SV_CORO(sv,func) \	627	/*
809	do { \	628	* this is a _very_ stripped down perl interpreter ;)
810	if (SvROK (sv)) \	629	*/
811	sv = SvRV (sv); \	630	PL_top_env = &PL_start_env;
812	\	631	/* inject call to cctx_init */
813	if (SvTYPE (sv) == SVt_PVHV) \	632	prepare_cctx ((coro_cctx *)arg);
814	{ \
815	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
816	\
817	if (!he) \
818	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
819	\
820	(sv) = SvRV (HeVAL(he)); \
821	} \
822	\
823	/* must also be changed inside Coro::Cont::yield */ \
824	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
825	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
826	\
827	} while(0)
828		633
829	#define SvSTATE(sv) (struct coro *)SvIV (sv)	634	/* somebody will hit me for both perl_run and PL_restartop */
		635	perl_run (PL_curinterp);
830		636
		637	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		638	abort ();
		639	}
		640
		641	static coro_cctx *
		642	cctx_new ()
		643	{
		644	coro_cctx *cctx;
		645
		646	New (0, cctx, 1, coro_cctx);
		647
		648	#if HAVE_MMAP
		649
		650	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		651	/* mmap suppsedly does allocate-on-write for us */
		652	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		653
		654	if (cctx->sptr == (void *)-1)
		655	{
		656	perror ("FATAL: unable to mmap stack for coroutine");
		657	_exit (EXIT_FAILURE);
		658	}
		659
		660	# if STACKGUARD
		661	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		662	# endif
		663
		664	#else
		665
		666	cctx->ssize = STACKSIZE * (long)sizeof (long);
		667	New (0, cctx->sptr, STACKSIZE, long);
		668
		669	if (!cctx->sptr)
		670	{
		671	perror ("FATAL: unable to malloc stack for coroutine");
		672	_exit (EXIT_FAILURE);
		673	}
		674
		675	#endif
		676
		677	#if USE_VALGRIND
		678	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		679	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		680	cctx->ssize + (char *)cctx->sptr
		681	);
		682	#endif
		683
		684	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		685
		686	return cctx;
		687	}
		688
		689	static void
		690	cctx_free (coro_cctx *cctx)
		691	{
		692	if (!cctx)
		693	return;
		694
		695	#if USE_VALGRIND
		696	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		697	#endif
		698
		699	#if HAVE_MMAP
		700	munmap (cctx->sptr, cctx->ssize);
		701	#else
		702	Safefree (cctx->sptr);
		703	#endif
		704
		705	Safefree (cctx);
		706	}
		707
		708	static coro_cctx *cctx_first;
		709	static int cctx_count, cctx_idle;
		710
		711	static coro_cctx *
		712	cctx_get ()
		713	{
		714	coro_cctx *cctx;
		715
		716	if (cctx_first)
		717	{
		718	--cctx_idle;
		719	cctx = cctx_first;
		720	cctx_first = cctx->next;
		721	}
		722	else
		723	{
		724	++cctx_count;
		725	cctx = cctx_new ();
		726	PL_op = PL_op->op_next;
		727	}
		728
		729	return cctx;
		730	}
		731
		732	static void
		733	cctx_put (coro_cctx *cctx)
		734	{
		735	++cctx_idle;
		736	cctx->next = cctx_first;
		737	cctx_first = cctx;
		738	}
		739
		740	/* never call directly, always through the coro_state_transfer global variable */
		741	static void NOINLINE
		742	transfer (struct coro *prev, struct coro *next, int flags)
		743	{
		744	dSTACKLEVEL;
		745
		746	/* sometimes transfer is only called to set idle_sp */
		747	if (flags == TRANSFER_SET_STACKLEVEL)
		748	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		749	else if (prev != next)
		750	{
		751	coro_cctx *prev__cctx;
		752
		753	LOCK;
		754
		755	if (next->mainstack)
		756	{
		757	/* coroutine already started */
		758	SAVE (prev, flags);
		759	LOAD (next);
		760	}
		761	else
		762	{
		763	/* need to start coroutine */
		764	/* first get rid of the old state */
		765	SAVE (prev, -1);
		766	/* setup coroutine call */
		767	setup_coro (next);
		768	/* need a stack */
		769	next->cctx = 0;
		770	}
		771
		772	if (!prev->cctx)
		773	/* create a new empty context */
		774	Newz (0, prev->cctx, 1, coro_cctx);
		775
		776	prev__cctx = prev->cctx;
		777
		778	/* possibly "free" the cctx */
		779	if (prev__cctx->idle_sp == STACKLEVEL)
		780	{
		781	cctx_put (prev__cctx);
		782	prev->cctx = 0;
		783	}
		784
		785	if (!next->cctx)
		786	next->cctx = cctx_get ();
		787
		788	if (prev__cctx != next->cctx)
		789	{
		790	prev__cctx->top_env = PL_top_env;
		791	PL_top_env = next->cctx->top_env;
		792	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		793	}
		794
		795	free_coro_mortal ();
		796
		797	UNLOCK;
		798	}
		799	}
		800
		801	struct transfer_args
		802	{
		803	struct coro *prev, *next;
		804	int flags;
		805	};
		806
		807	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		808
		809	static void
		810	coro_state_destroy (struct coro *coro)
		811	{
		812	if (coro->refcnt--)
		813	return;
		814
		815	if (coro->mainstack && coro->mainstack != main_mainstack)
		816	{
		817	struct coro temp;
		818
		819	SAVE ((&temp), TRANSFER_SAVE_ALL);
		820	LOAD (coro);
		821
		822	coro_destroy_stacks ();
		823
		824	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		825
		826	coro->mainstack = 0;
		827	}
		828
		829	cctx_free (coro->cctx);
		830	SvREFCNT_dec (coro->args);
		831	Safefree (coro);
		832	}
		833
831	static void	834	static int
		835	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		836	{
		837	struct coro *coro = (struct coro *)mg->mg_ptr;
		838	mg->mg_ptr = 0;
		839
		840	coro_state_destroy (coro);
		841
		842	return 0;
		843	}
		844
		845	static int
		846	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		847	{
		848	struct coro *coro = (struct coro *)mg->mg_ptr;
		849
		850	++coro->refcnt;
		851
		852	return 0;
		853	}
		854
		855	static MGVTBL coro_state_vtbl = {
		856	0, 0, 0, 0,
		857	coro_state_clear,
		858	0,
		859	#ifdef MGf_DUP
		860	coro_state_dup,
		861	#else
		862	# define MGf_DUP 0
		863	#endif
		864	};
		865
		866	static struct coro *
		867	SvSTATE (SV *coro)
		868	{
		869	HV *stash;
		870	MAGIC *mg;
		871
		872	if (SvROK (coro))
		873	coro = SvRV (coro);
		874
		875	stash = SvSTASH (coro);
		876	if (stash != coro_stash && stash != coro_state_stash)
		877	{
		878	/* very slow, but rare, check */
		879	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		880	croak ("Coro::State object required");
		881	}
		882
		883	mg = SvMAGIC (coro);
		884	assert (mg->mg_type == PERL_MAGIC_ext);
		885	return (struct coro *)mg->mg_ptr;
		886	}
		887
		888	static void
		889	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		890	{
		891	ta->prev = SvSTATE (prev);
		892	ta->next = SvSTATE (next);
		893	ta->flags = flags;
		894	}
		895
		896	static void
832	api_transfer(pTHX_ SV *prev, SV *next, int flags)	897	api_transfer (SV *prev, SV *next, int flags)
833	{	898	{
834	SV_CORO (prev, "Coro::transfer");	899	dTHX;
835	SV_CORO (next, "Coro::transfer");	900	struct transfer_args ta;
836		901
837	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	902	prepare_transfer (&ta, prev, next, flags);
		903	TRANSFER (ta);
838	}	904	}
839		905
840	/** Coro ********************************************************************/	906	/** Coro ********************************************************************/
841		907
842	#define PRIO_MAX 3	908	#define PRIO_MAX 3
…		…
846	#define PRIO_IDLE -3	912	#define PRIO_IDLE -3
847	#define PRIO_MIN -4	913	#define PRIO_MIN -4
848		914
849	/* for Coro.pm */	915	/* for Coro.pm */
850	static GV *coro_current, *coro_idle;	916	static GV *coro_current, *coro_idle;
851	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	917	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
852	static int coro_nready;	918	static int coro_nready;
853		919
854	static void	920	static void
855	coro_enq (pTHX_ SV *sv)	921	coro_enq (SV *sv)
856	{	922	{
		923	int prio;
		924
857	if (SvTYPE (sv) == SVt_PVHV)	925	if (SvTYPE (sv) != SVt_PVHV)
858	{
859	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
860	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
861
862	prio = prio > PRIO_MAX ? PRIO_MAX
863	: prio < PRIO_MIN ? PRIO_MIN
864	: prio;
865
866	av_push (coro_ready [prio - PRIO_MIN], sv);
867	coro_nready++;
868
869	return;
870	}
871
872	croak ("Coro::ready tried to enqueue something that is not a coroutine");	926	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		927
		928	prio = SvSTATE (sv)->prio;
		929
		930	av_push (coro_ready [prio - PRIO_MIN], sv);
		931	coro_nready++;
873	}	932	}
874		933
875	static SV *	934	static SV *
876	coro_deq (pTHX_ int min_prio)	935	coro_deq (int min_prio)
877	{	936	{
878	int prio = PRIO_MAX - PRIO_MIN;	937	int prio = PRIO_MAX - PRIO_MIN;
879		938
880	min_prio -= PRIO_MIN;	939	min_prio -= PRIO_MIN;
881	if (min_prio < 0)	940	if (min_prio < 0)
882	min_prio = 0;	941	min_prio = 0;
883		942
884	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	943	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
885	if (av_len (coro_ready[prio]) >= 0)	944	if (AvFILLp (coro_ready [prio]) >= 0)
886	{	945	{
887	coro_nready--;	946	coro_nready--;
888	return av_shift (coro_ready[prio]);	947	return av_shift (coro_ready [prio]);
889	}	948	}
890		949
891	return 0;	950	return 0;
892	}	951	}
893		952
…		…
898		957
899	if (SvROK (coro))	958	if (SvROK (coro))
900	coro = SvRV (coro);	959	coro = SvRV (coro);
901		960
902	LOCK;	961	LOCK;
903	coro_enq (aTHX_ SvREFCNT_inc (coro));	962	coro_enq (SvREFCNT_inc (coro));
904	UNLOCK;	963	UNLOCK;
905	}	964	}
906		965
907	static void	966	static void
		967	prepare_schedule (struct transfer_args *ta)
		968	{
		969	SV *current, *prev, *next;
		970
		971	current = GvSV (coro_current);
		972
		973	for (;;)
		974	{
		975	LOCK;
		976	next = coro_deq (PRIO_MIN);
		977	UNLOCK;
		978
		979	if (next)
		980	break;
		981
		982	{
		983	dSP;
		984
		985	ENTER;
		986	SAVETMPS;
		987
		988	PUSHMARK (SP);
		989	PUTBACK;
		990	call_sv (GvSV (coro_idle), G_DISCARD);
		991
		992	FREETMPS;
		993	LEAVE;
		994	}
		995	}
		996
		997	prev = SvRV (current);
		998	SvRV (current) = next;
		999
		1000	/* free this only after the transfer */
		1001	LOCK;
		1002	free_coro_mortal ();
		1003	UNLOCK;
		1004	coro_mortal = prev;
		1005
		1006	ta->prev = SvSTATE (prev);
		1007	ta->next = SvSTATE (next);
		1008	ta->flags = TRANSFER_SAVE_ALL;
		1009	}
		1010
		1011	static void
		1012	prepare_cede (struct transfer_args *ta)
		1013	{
		1014	LOCK;
		1015	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		1016	UNLOCK;
		1017
		1018	prepare_schedule (ta);
		1019	}
		1020
		1021	static void
908	api_schedule (void)	1022	api_schedule (void)
909	{	1023	{
910	dTHX;	1024	dTHX;
		1025	struct transfer_args ta;
911		1026
912	SV *prev, *next;	1027	prepare_schedule (&ta);
913		1028	TRANSFER (ta);
914	LOCK;
915
916	prev = SvRV (GvSV (coro_current));
917	next = coro_deq (aTHX_ PRIO_MIN);
918
919	if (!next)
920	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
921
922	/* free this only after the transfer */
923	coro_mortal = prev;
924	SV_CORO (prev, "Coro::schedule");
925
926	SvRV (GvSV (coro_current)) = next;
927
928	SV_CORO (next, "Coro::schedule");
929
930	UNLOCK;
931
932	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
933	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
934	}	1029	}
935		1030
936	static void	1031	static void
937	api_cede (void)	1032	api_cede (void)
938	{	1033	{
939	dTHX;	1034	dTHX;
		1035	struct transfer_args ta;
940		1036
941	LOCK;	1037	prepare_cede (&ta);
942	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1038	TRANSFER (ta);
943	UNLOCK;
944
945	api_schedule ();
946	}	1039	}
947		1040
948	MODULE = Coro::State PACKAGE = Coro::State	1041	MODULE = Coro::State PACKAGE = Coro::State
949		1042
950	PROTOTYPES: ENABLE	1043	PROTOTYPES: DISABLE
951		1044
952	BOOT:	1045	BOOT:
953	{ /* {} necessary for stoopid perl-5.6.x */	1046	{
954	#ifdef USE_ITHREADS	1047	#ifdef USE_ITHREADS
955	MUTEX_INIT (&coro_mutex);	1048	MUTEX_INIT (&coro_mutex);
956	#endif	1049	#endif
		1050	BOOT_PAGESIZE;
957		1051
958	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
959	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
960	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1052	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
961		1053
962	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1054	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
963	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1055	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
964	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1056	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
965	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
966		1057
967	main_mainstack = PL_mainstack;	1058	main_mainstack = PL_mainstack;
968		1059
969	coroapi.ver = CORO_API_VERSION;	1060	coroapi.ver = CORO_API_VERSION;
970	coroapi.transfer = api_transfer;	1061	coroapi.transfer = api_transfer;
971	}
972		1062
973	Coro::State	1063	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
974	_newprocess(args)	1064	}
975	SV * args	1065
976	PROTOTYPE: $	1066	SV *
		1067	new (char *klass, ...)
977	CODE:	1068	CODE:
978	Coro__State coro;	1069	{
		1070	struct coro *coro;
		1071	HV *hv;
		1072	int i;
979		1073
980	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
981	croak ("Coro::State::_newprocess expects an arrayref");
982
983	Newz (0, coro, 1, struct coro);	1074	Newz (0, coro, 1, struct coro);
		1075	coro->args = newAV ();
984		1076
985	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1077	hv = newHV ();
986	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1078	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
987	/*coro->stack = 0;*/	1079	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
988		1080
989	/* same as JMPENV_BOOTSTRAP */	1081	for (i = 1; i < items; i++)
990	/* we might be able to recycle start_env, but safe is safe */	1082	av_push (coro->args, newSVsv (ST (i)));
991	/*Zero(&coro->start_env, 1, JMPENV);*/	1083	}
992	coro->start_env.je_ret = -1;
993	coro->start_env.je_mustcatch = TRUE;
994
995	RETVAL = coro;
996	OUTPUT:	1084	OUTPUT:
997	RETVAL	1085	RETVAL
998		1086
999	void	1087	void
1000	transfer(prev, next, flags)	1088	_set_stacklevel (...)
1001	SV *prev	1089	ALIAS:
1002	SV *next	1090	Coro::State::transfer = 1
1003	int flags	1091	Coro::schedule = 2
1004	PROTOTYPE: @	1092	Coro::cede = 3
		1093	Coro::Cont::yield = 4
1005	CODE:	1094	CODE:
1006	PUTBACK;	1095	{
1007	SV_CORO (next, "Coro::transfer");	1096	struct transfer_args ta;
1008	SV_CORO (prev, "Coro::transfer");	1097
1009	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1098	switch (ix)
1010	SPAGAIN;	1099	{
		1100	case 0:
		1101	ta.prev = (struct coro *)INT2PTR (coro_cctx *, 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	}
1011		1151
1012	void	1152	void
1013	DESTROY(coro)	1153	_clone_state_from (SV *dst, SV *src)
1014	Coro::State coro	1154	CODE:
1015	CODE:	1155	{
		1156	struct coro *coro_src = SvSTATE (src);
1016		1157
1017	if (coro->mainstack && coro->mainstack != main_mainstack)	1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1018	{
1019	struct coro temp;
1020		1159
1021	PUTBACK;	1160	++coro_src->refcnt;
1022	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;
1023	LOAD (aTHX_ coro);	1162	}
1024	SPAGAIN;
1025
1026	destroy_stacks (aTHX);
1027
1028	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1029	SPAGAIN;
1030
1031	coro->mainstack = 0;
1032	}
1033
1034	deallocate_stack (coro);
1035	SvREFCNT_dec (coro->args);
1036	Safefree (coro);
1037		1163
1038	void	1164	void
1039	_exit(code)	1165	_exit (code)
1040	int code	1166	int code
1041	PROTOTYPE: $	1167	PROTOTYPE: $
1042	CODE:	1168	CODE:
1043	_exit (code);	1169	_exit (code);
1044		1170
1045	MODULE = Coro::State PACKAGE = Coro::Cont	1171	int
		1172	cctx_count ()
		1173	CODE:
		1174	RETVAL = cctx_count;
		1175	OUTPUT:
		1176	RETVAL
1046		1177
1047	# this is slightly dirty (should expose a c-level api)	1178	int
1048		1179	cctx_idle ()
1049	void	1180	CODE:
1050	yield(...)	1181	RETVAL = cctx_idle;
1051	PROTOTYPE: @	1182	OUTPUT:
1052	CODE:	1183	RETVAL
1053	static SV *returnstk;
1054	SV *sv;
1055	AV *defav = GvAV (PL_defgv);
1056	struct coro *prev, *next;
1057
1058	if (!returnstk)
1059	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1060
1061	/* set up @_ -- ugly */
1062	av_clear (defav);
1063	av_fill (defav, items - 1);
1064	while (items--)
1065	av_store (defav, items, SvREFCNT_inc (ST(items)));
1066
1067	SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1068	sv = av_pop ((AV *)SvRV (returnstk));
1069	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1070	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1071	SvREFCNT_dec (sv);
1072
1073	transfer (aTHX_ prev, next, 0);
1074		1184
1075	MODULE = Coro::State PACKAGE = Coro	1185	MODULE = Coro::State PACKAGE = Coro
1076		1186
1077	# this is slightly dirty (should expose a c-level api)
1078
1079	BOOT:	1187	BOOT:
1080	{	1188	{
1081	int i;	1189	int i;
		1190
1082	HV *stash = gv_stashpv ("Coro", TRUE);	1191	coro_stash = gv_stashpv ("Coro", TRUE);
1083		1192
1084	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1193	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1085	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1194	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1086	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1195	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1087	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1196	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1088	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1197	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1089	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1198	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1090		1199
1091	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1200	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1092	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1201	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1093		1202
1094	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1203	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1102	coroapi.ready = api_ready;	1211	coroapi.ready = api_ready;
1103	coroapi.nready = &coro_nready;	1212	coroapi.nready = &coro_nready;
1104	coroapi.current = coro_current;	1213	coroapi.current = coro_current;
1105		1214
1106	GCoroAPI = &coroapi;	1215	GCoroAPI = &coroapi;
1107	sv_setiv(sv, (IV)&coroapi);	1216	sv_setiv (sv, (IV)&coroapi);
1108	SvREADONLY_on(sv);	1217	SvREADONLY_on (sv);
1109	}	1218	}
1110	}	1219	}
1111		1220
1112	#if !PERL_MICRO	1221	int
		1222	prio (Coro::State coro, int newprio = 0)
		1223	ALIAS:
		1224	nice = 1
		1225	CODE:
		1226	{
		1227	RETVAL = coro->prio;
		1228
		1229	if (items > 1)
		1230	{
		1231	if (ix)
		1232	newprio += coro->prio;
		1233
		1234	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1235	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1236
		1237	coro->prio = newprio;
		1238	}
		1239	}
1113		1240
1114	void	1241	void
1115	ready(self)	1242	ready (SV *self)
1116	SV * self
1117	PROTOTYPE: $	1243	PROTOTYPE: $
1118	CODE:	1244	CODE:
1119	api_ready (self);	1245	api_ready (self);
1120		1246
1121	#endif
1122
1123	int	1247	int
1124	nready(...)	1248	nready (...)
1125	PROTOTYPE:	1249	PROTOTYPE:
1126	CODE:	1250	CODE:
1127	RETVAL = coro_nready;	1251	RETVAL = coro_nready;
1128	OUTPUT:	1252	OUTPUT:
1129	RETVAL	1253	RETVAL
1130		1254
		1255	MODULE = Coro::State PACKAGE = Coro::AIO
		1256
		1257	SV *
		1258	_get_state ()
		1259	CODE:
		1260	{
		1261	struct {
		1262	int errorno;
		1263	int laststype;
		1264	int laststatval;
		1265	Stat_t statcache;
		1266	} data;
		1267
		1268	data.errorno = errno;
		1269	data.laststype = PL_laststype;
		1270	data.laststatval = PL_laststatval;
		1271	data.statcache = PL_statcache;
		1272
		1273	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1274	}
		1275	OUTPUT:
		1276	RETVAL
		1277
1131	void	1278	void
1132	schedule(...)	1279	_set_state (char *data_)
1133	PROTOTYPE:	1280	PROTOTYPE: $
1134	CODE:	1281	CODE:
1135	api_schedule ();	1282	{
		1283	struct {
		1284	int errorno;
		1285	int laststype;
		1286	int laststatval;
		1287	Stat_t statcache;
		1288	} *data = (void *)data_;
1136		1289
1137	void	1290	errno = data->errorno;
1138	cede(...)	1291	PL_laststype = data->laststype;
1139	PROTOTYPE:	1292	PL_laststatval = data->laststatval;
1140	CODE:	1293	PL_statcache = data->statcache;
1141	api_cede ();	1294	}
1142

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