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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.29 by root, Sat Aug 25 21:40:34 2001 UTC vs.
Revision 1.110 by root, Tue Nov 28 23:08:07 2006 UTC

		1	#include "libcoro/coro.c"
		2
1	#include "EXTERN.h"	3	#include "EXTERN.h"
2	#include "perl.h"	4	#include "perl.h"
3	#include "XSUB.h"	5	#include "XSUB.h"
4		6
5	#include "libcoro/coro.c"	7	#include "patchlevel.h"
6		8
		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)
		20	# ifndef PL_ppaddr
		21	# define PL_ppaddr ppaddr
		22	# endif
		23	# ifndef call_sv
		24	# define call_sv perl_call_sv
		25	# endif
		26	# ifndef get_sv
		27	# define get_sv perl_get_sv
		28	# endif
		29	# ifndef get_cv
		30	# define get_cv perl_get_cv
		31	# endif
		32	# ifndef IS_PADGV
		33	# define IS_PADGV(v) 0
		34	# endif
		35	# ifndef IS_PADCONST
		36	# define IS_PADCONST(v) 0
		37	# endif
		38	#endif
		39
7	#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
8		50
9	#ifdef HAVE_MMAP	51	#ifdef HAVE_MMAP
10	# include <unistd.h>	52	# include <unistd.h>
11	# include <sys/mman.h>	53	# include <sys/mman.h>
12	# ifndef MAP_ANON
13	# ifdef MAP_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
14	# define MAP_ANON MAP_ANONYMOUS	55	# ifdef MAP_ANON
		56	# define MAP_ANONYMOUS MAP_ANON
15	# else	57	# else
16	# undef HAVE_MMAP	58	# undef HAVE_MMAP
17	# endif	59	# endif
18	# 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
19	#endif	68	# endif
20		69	#else
21	#define MAY_FLUSH /* increases codesize and is rarely used */	70	# define PAGESIZE 0
22		71	# define BOOT_PAGESIZE (void)0
23	#define SUB_INIT "Coro::State::initialize"	72	#endif
24	#define UCORO_STATE "_coro_state"
25		73
26	/* 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
27	* 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
28	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
30		79
31	#define labs(l) ((l) >= 0 ? (l) : -(l))	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		81
		82	#if __GNUC__ >= 3
		83	# define attribute(x) __attribute__(x)
		84	#else
		85	# define attribute(x)
		86	#endif
		87
		88	#define NOINLINE attribute ((noinline))
32		89
33	#include "CoroAPI.h"	90	#include "CoroAPI.h"
34		91
		92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
		93
		94	#ifdef USE_ITHREADS
		95	static perl_mutex coro_mutex;
		96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		98	#else
		99	# define LOCK (void)0
		100	# define UNLOCK (void)0
		101	#endif
		102
35	static struct CoroAPI coroapi;	103	static struct CoroAPI coroapi;
		104	static AV *main_mainstack; /* used to differentiate between $main and others */
		105	static HV *coro_state_stash, *coro_stash;
		106	static SV *coro_mortal; /* will be freed after next transfer */
36		107
37	/* this is actually not only the c stack but also c registers etc... */	108	static struct coro_cctx *cctx_first;
		109	static int cctx_count, cctx_idle;
		110
		111	/* this is a structure representing a c-level coroutine */
38	typedef struct {	112	typedef struct coro_cctx {
39	int refcnt; /* pointer reference counter */	113	struct coro_cctx *next;
40	int usecnt; /* shared by how many coroutines */
41	int gencnt; /* generation counter */
42		114
43	coro_context cctx;	115	/* the stack */
44
45	void *sptr;	116	void *sptr;
46	long ssize; /* positive == mmap, otherwise malloc */	117	long ssize; /* positive == mmap, otherwise malloc */
47	} coro_stack;
48		118
		119	/* cpu state */
		120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		121	JMPENV *top_env;
		122	coro_context cctx;
		123
		124	#if USE_VALGRIND
		125	int valgrind_id;
		126	#endif
		127	} coro_cctx;
		128
		129	/* this is a structure representing a perl-level coroutine */
49	struct coro {	130	struct coro {
50	/* the optional C context */	131	/* the c coroutine allocated to this perl coroutine, if any */
51	coro_stack *stack;	132	coro_cctx *cctx;
52	void *cursp;	133
		134	/* data associated with this coroutine (initial args) */
		135	AV *args;
53	int gencnt;	136	int refcnt;
54		137
55	/* optionally saved, might be zero */	138	/* optionally saved, might be zero */
56	AV *defav;	139	AV *defav;
57	SV *defsv;	140	SV *defsv;
58	SV *errsv;	141	SV *errsv;
59		142
60	/* saved global state not related to stacks */	143	#define VAR(name,type) type name;
61	U8 dowarn;	144	# include "state.h"
62	I32 in_eval;	145	#undef VAR
63		146
64	/* the stacks and related info (callchain etc..) */	147	/* coro process data */
65	PERL_SI *curstackinfo;	148	int prio;
66	AV *curstack;
67	AV *mainstack;
68	SV **stack_sp;
69	OP *op;
70	SV **curpad;
71	SV **stack_base;
72	SV **stack_max;
73	SV **tmps_stack;
74	I32 tmps_floor;
75	I32 tmps_ix;
76	I32 tmps_max;
77	I32 *markstack;
78	I32 *markstack_ptr;
79	I32 *markstack_max;
80	I32 *scopestack;
81	I32 scopestack_ix;
82	I32 scopestack_max;
83	ANY *savestack;
84	I32 savestack_ix;
85	I32 savestack_max;
86	OP **retstack;
87	I32 retstack_ix;
88	I32 retstack_max;
89	COP *curcop;
90	JMPENV *top_env;
91
92	/* data associated with this coroutine (initial args) */
93	AV *args;
94	};	149	};
95		150
96	typedef struct coro *Coro__State;	151	typedef struct coro *Coro__State;
97	typedef struct coro *Coro__State_or_hashref;	152	typedef struct coro *Coro__State_or_hashref;
98		153
99	static AV *main_mainstack; /* used to differentiate between $main and others */	154	static AV *
100	static HV *coro_state_stash;	155	coro_clone_padlist (CV *cv)
101	static SV *ucoro_state_sv;
102	static U32 ucoro_state_hash;
103	static HV *padlist_cache;
104
105	/* mostly copied from op.c:cv_clone2 */
106	STATIC AV *
107	clone_padlist (AV *protopadlist)
108	{	156	{
109	AV *av;	157	AV *padlist = CvPADLIST (cv);
110	I32 ix;
111	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
112	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
113	SV **pname = AvARRAY (protopad_name);
114	SV **ppad = AvARRAY (protopad);
115	I32 fname = AvFILLp (protopad_name);
116	I32 fpad = AvFILLp (protopad);
117	AV *newpadlist, *newpad_name, *newpad;	158	AV *newpadlist, *newpad;
118	SV **npad;
119
120	newpad_name = newAV ();
121	for (ix = fname; ix >= 0; ix--)
122	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124	newpad = newAV ();
125	av_fill (newpad, AvFILLp (protopad));
126	npad = AvARRAY (newpad);
127		159
128	newpadlist = newAV ();	160	newpadlist = newAV ();
129	AvREAL_off (newpadlist);	161	AvREAL_off (newpadlist);
130	av_store (newpadlist, 0, (SV *) newpad_name);	162	#if PERL_VERSION_ATLEAST (5,9,0)
		163	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		164	#else
		165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		166	#endif
		167	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		168	--AvFILLp (padlist);
		169
		170	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
131	av_store (newpadlist, 1, (SV *) newpad);	171	av_store (newpadlist, 1, (SV *)newpad);
132		172
133	av = newAV (); /* will be @_ */	173	return newpadlist;
134	av_extend (av, 0);	174	}
135	av_store (newpad, 0, (SV *) av);
136	AvFLAGS (av) = AVf_REIFY;
137		175
138	for (ix = fpad; ix > 0; ix--)	176	static void
		177	free_padlist (AV *padlist)
		178	{
		179	/* may be during global destruction */
		180	if (SvREFCNT (padlist))
139	{	181	{
140	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	182	I32 i = AvFILLp (padlist);
141	if (namesv && namesv != &PL_sv_undef)	183	while (i >= 0)
142	{	184	{
143	char *name = SvPVX (namesv); /* XXX */	185	SV **svp = av_fetch (padlist, i--, FALSE);
144	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	186	if (svp)
145	{ /* lexical from outside? */
146	npad[ix] = SvREFCNT_inc (ppad[ix]);
147	}	187	{
148	else
149	{ /* our own lexical */
150	SV *sv;	188	SV *sv;
151	if (*name == '&')	189	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
152	sv = SvREFCNT_inc (ppad[ix]);	190	SvREFCNT_dec (sv);
153	else if (*name == '@')	191
154	sv = (SV *) newAV ();	192	SvREFCNT_dec (*svp);
155	else if (*name == '%')
156	sv = (SV *) newHV ();
157	else
158	sv = NEWSV (0, 0);
159	if (!SvPADBUSY (sv))
160	SvPADMY_on (sv);
161	npad[ix] = sv;
162	}	193	}
163	}	194	}
164	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	195
165	{	196	SvREFCNT_dec ((SV*)padlist);
166	npad[ix] = SvREFCNT_inc (ppad[ix]);
167	}
168	else
169	{
170	SV *sv = NEWSV (0, 0);
171	SvPADTMP_on (sv);
172	npad[ix] = sv;
173	}
174	}	197	}
		198	}
175		199
176	#if 0 /* return -ENOTUNDERSTOOD */	200	static int
177	/* Now that vars are all in place, clone nested closures. */	201	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		202	{
		203	AV *padlist;
		204	AV *av = (AV *)mg->mg_obj;
178		205
179	for (ix = fpad; ix > 0; ix--) {	206	/* casting is fun. */
180	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	207	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
181	if (namesv	208	free_padlist (padlist);
182	&& namesv != &PL_sv_undef	209
183	&& !(SvFLAGS(namesv) & SVf_FAKE)	210	SvREFCNT_dec (av);
184	&& *SvPVX(namesv) == '&'	211
185	&& CvCLONE(ppad[ix]))	212	return 0;
186	{	213	}
187	CV *kid = cv_clone((CV*)ppad[ix]);	214
188	SvREFCNT_dec(ppad[ix]);	215	#define PERL_MAGIC_coro PERL_MAGIC_ext
189	CvCLONE_on(kid);	216
190	SvPADMY_on(kid);	217	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
191	npad[ix] = (SV*)kid;	218
192	}	219	#define CORO_MAGIC(cv) \
		220	SvMAGIC (cv) \
		221	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		222	? SvMAGIC (cv) \
		223	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		224	: 0
		225
		226	/* the next two functions merely cache the padlists */
		227	static void
		228	get_padlist (CV *cv)
		229	{
		230	MAGIC *mg = CORO_MAGIC (cv);
		231	AV *av;
		232
		233	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
		234	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		235	else
		236	{
		237	#if 0
		238	/* this is probably cleaner, but also slower? */
		239	CV *cp = Perl_cv_clone (cv);
		240	CvPADLIST (cv) = CvPADLIST (cp);
		241	CvPADLIST (cp) = 0;
		242	SvREFCNT_dec (cp);
		243	#else
		244	CvPADLIST (cv) = coro_clone_padlist (cv);
		245	#endif
		246	}
		247	}
		248
		249	static void
		250	put_padlist (CV *cv)
		251	{
		252	MAGIC *mg = CORO_MAGIC (cv);
		253	AV *av;
		254
		255	if (!mg)
		256	{
		257	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		258	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		259	mg->mg_virtual = &vtbl_coro;
		260	mg->mg_obj = (SV *)newAV ();
193	}	261	}
194	#endif
195		262
196	return newpadlist;	263	av = (AV *)mg->mg_obj;
197	}
198		264
199	#ifdef MAY_FLUSH	265	if (AvFILLp (av) >= AvMAX (av))
200	STATIC void	266	av_extend (av, AvMAX (av) + 1);
201	free_padlist (AV *padlist)
202	{
203	/* may be during global destruction */
204	if (SvREFCNT(padlist))
205	{
206	I32 i = AvFILLp(padlist);
207	while (i >= 0)
208	{
209	SV **svp = av_fetch(padlist, i--, FALSE);
210	SV *sv = svp ? *svp : Nullsv;
211	if (sv)
212	SvREFCNT_dec(sv);
213	}
214		267
215	SvREFCNT_dec((SV*)padlist);	268	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
216	}
217	}	269	}
218	#endif
219
220	/* the next two functions merely cache the padlists */
221	STATIC void
222	get_padlist (CV *cv)
223	{
224	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226	if (he && AvFILLp ((AV *)*he) >= 0)
227	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228	else
229	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230	}
231
232	STATIC void
233	put_padlist (CV *cv)
234	{
235	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237	if (SvTYPE (*he) != SVt_PVAV)
238	{
239	SvREFCNT_dec (*he);
240	*he = (SV *)newAV ();
241	}
242
243	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244	}
245
246	#ifdef MAY_FLUSH
247	STATIC void
248	flush_padlist_cache ()
249	{
250	HV *hv = padlist_cache;
251	padlist_cache = newHV ();
252
253	if (hv_iterinit (hv))
254	{
255	HE *he;
256	AV *padlist;
257
258	while (!!(he = hv_iternext (hv)))
259	{
260	AV *av = (AV *)HeVAL(he);
261
262	/* casting is fun. */
263	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264	free_padlist (padlist);
265	}
266	}
267
268	SvREFCNT_dec (hv);
269	}
270	#endif
271		270
272	#define SB do {	271	#define SB do {
273	#define SE } while (0)	272	#define SE } while (0)
274		273
275	#define LOAD(state) load_state(aTHX_ (state));	274	#define LOAD(state) load_state((state));
276	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	275	#define SAVE(state,flags) save_state((state),(flags));
277		276
278	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	277	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
279		278
280	static void	279	static void
281	load_state(pTHX_ Coro__State c)	280	load_state(Coro__State c)
282	{	281	{
283	PL_dowarn = c->dowarn;	282	#define VAR(name,type) PL_ ## name = c->name;
284	PL_in_eval = c->in_eval;	283	# include "state.h"
285		284	#undef VAR
286	PL_curstackinfo = c->curstackinfo;
287	PL_curstack = c->curstack;
288	PL_mainstack = c->mainstack;
289	PL_stack_sp = c->stack_sp;
290	PL_op = c->op;
291	PL_curpad = c->curpad;
292	PL_stack_base = c->stack_base;
293	PL_stack_max = c->stack_max;
294	PL_tmps_stack = c->tmps_stack;
295	PL_tmps_floor = c->tmps_floor;
296	PL_tmps_ix = c->tmps_ix;
297	PL_tmps_max = c->tmps_max;
298	PL_markstack = c->markstack;
299	PL_markstack_ptr = c->markstack_ptr;
300	PL_markstack_max = c->markstack_max;
301	PL_scopestack = c->scopestack;
302	PL_scopestack_ix = c->scopestack_ix;
303	PL_scopestack_max = c->scopestack_max;
304	PL_savestack = c->savestack;
305	PL_savestack_ix = c->savestack_ix;
306	PL_savestack_max = c->savestack_max;
307	PL_retstack = c->retstack;
308	PL_retstack_ix = c->retstack_ix;
309	PL_retstack_max = c->retstack_max;
310	PL_curcop = c->curcop;
311	PL_top_env = c->top_env;
312		285
313	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	286	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	287	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	288	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316		289
…		…
319	CV *cv;	292	CV *cv;
320		293
321	/* now do the ugly restore mess */	294	/* now do the ugly restore mess */
322	while ((cv = (CV *)POPs))	295	while ((cv = (CV *)POPs))
323	{	296	{
324	AV *padlist = (AV *)POPs;
325
326	if (padlist)
327	{
328	put_padlist (cv); /* mark this padlist as available */	297	put_padlist (cv); /* mark this padlist as available */
329	CvPADLIST(cv) = padlist;	298	CvDEPTH (cv) = PTR2IV (POPs);
330	#ifdef USE_THREADS	299	CvPADLIST (cv) = (AV *)POPs;
331	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332	#endif
333	}
334
335	++CvDEPTH(cv);
336	}	300	}
337		301
338	PUTBACK;	302	PUTBACK;
339	}	303	}
340	}	304	}
341		305
342	static void	306	static void
343	save_state(pTHX_ Coro__State c, int flags)	307	save_state(Coro__State c, int flags)
344	{	308	{
345	{	309	{
346	dSP;	310	dSP;
347	I32 cxix = cxstack_ix;	311	I32 cxix = cxstack_ix;
348	PERL_CONTEXT *ccstk = cxstack;	312	PERL_CONTEXT *ccstk = cxstack;
…		…
355		319
356	PUSHs (Nullsv);	320	PUSHs (Nullsv);
357	/* this loop was inspired by pp_caller */	321	/* this loop was inspired by pp_caller */
358	for (;;)	322	for (;;)
359	{	323	{
360	do	324	while (cxix >= 0)
361	{	325	{
362	PERL_CONTEXT *cx = &ccstk[cxix--];	326	PERL_CONTEXT *cx = &ccstk[cxix--];
363		327
364	if (CxTYPE(cx) == CXt_SUB)	328	if (CxTYPE(cx) == CXt_SUB)
365	{	329	{
366	CV *cv = cx->blk_sub.cv;	330	CV *cv = cx->blk_sub.cv;
		331
367	if (CvDEPTH(cv))	332	if (CvDEPTH (cv))
368	{	333	{
369	#ifdef USE_THREADS
370	/*XPUSHs ((SV *)CvOWNER(cv));*/
371	/*CvOWNER(cv) = 0;*/
372	/*error must unlock this cv etc.. etc...*/
373	#endif
374	EXTEND (SP, CvDEPTH(cv)*2);	334	EXTEND (SP, 3);
375
376	while (--CvDEPTH(cv))
377	{
378	/* this tells the restore code to increment CvDEPTH */
379	PUSHs (Nullsv);
380	PUSHs ((SV *)cv);
381	}
382		335
383	PUSHs ((SV *)CvPADLIST(cv));	336	PUSHs ((SV *)CvPADLIST(cv));
		337	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
384	PUSHs ((SV *)cv);	338	PUSHs ((SV *)cv);
385		339
		340	CvDEPTH (cv) = 0;
386	get_padlist (cv); /* this is a monster */	341	get_padlist (cv);
387	}	342	}
388	}	343	}
		344	#ifdef CXt_FORMAT
389	else if (CxTYPE(cx) == CXt_FORMAT)	345	else if (CxTYPE(cx) == CXt_FORMAT)
390	{	346	{
391	/* I never used formats, so how should I know how these are implemented? */	347	/* I never used formats, so how should I know how these are implemented? */
392	/* my bold guess is as a simple, plain sub... */	348	/* my bold guess is as a simple, plain sub... */
393	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	349	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394	}	350	}
		351	#endif
395	}	352	}
396	while (cxix >= 0);
397		353
398	if (top_si->si_type == PERLSI_MAIN)	354	if (top_si->si_type == PERLSI_MAIN)
399	break;	355	break;
400		356
401	top_si = top_si->si_prev;	357	top_si = top_si->si_prev;
…		…
408		364
409	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	365	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
410	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	366	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
411	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	367	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
412		368
413	c->dowarn = PL_dowarn;	369	#define VAR(name,type)c->name = PL_ ## name;
414	c->in_eval = PL_in_eval;	370	# include "state.h"
415		371	#undef VAR
416	c->curstackinfo = PL_curstackinfo;
417	c->curstack = PL_curstack;
418	c->mainstack = PL_mainstack;
419	c->stack_sp = PL_stack_sp;
420	c->op = PL_op;
421	c->curpad = PL_curpad;
422	c->stack_base = PL_stack_base;
423	c->stack_max = PL_stack_max;
424	c->tmps_stack = PL_tmps_stack;
425	c->tmps_floor = PL_tmps_floor;
426	c->tmps_ix = PL_tmps_ix;
427	c->tmps_max = PL_tmps_max;
428	c->markstack = PL_markstack;
429	c->markstack_ptr = PL_markstack_ptr;
430	c->markstack_max = PL_markstack_max;
431	c->scopestack = PL_scopestack;
432	c->scopestack_ix = PL_scopestack_ix;
433	c->scopestack_max = PL_scopestack_max;
434	c->savestack = PL_savestack;
435	c->savestack_ix = PL_savestack_ix;
436	c->savestack_max = PL_savestack_max;
437	c->retstack = PL_retstack;
438	c->retstack_ix = PL_retstack_ix;
439	c->retstack_max = PL_retstack_max;
440	c->curcop = PL_curcop;
441	c->top_env = PL_top_env;
442	}	372	}
443		373
444	/*	374	/*
445	* allocate various perl stacks. This is an exact copy	375	* allocate various perl stacks. This is an exact copy
446	* of perl.c:init_stacks, except that it uses less memory	376	* of perl.c:init_stacks, except that it uses less memory
447	* on the assumption that coroutines do not usually need	377	* on the (sometimes correct) assumption that coroutines do
448	* a lot of stackspace.	378	* not usually need a lot of stackspace.
449	*/	379	*/
450	STATIC void	380	static void
451	coro_init_stacks (pTHX)	381	coro_init_stacks ()
452	{	382	{
453	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	383	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
454	PL_curstackinfo->si_type = PERLSI_MAIN;	384	PL_curstackinfo->si_type = PERLSI_MAIN;
455	PL_curstack = PL_curstackinfo->si_stack;	385	PL_curstack = PL_curstackinfo->si_stack;
456	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	386	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
466		396
467	New(54,PL_markstack,16,I32);	397	New(54,PL_markstack,16,I32);
468	PL_markstack_ptr = PL_markstack;	398	PL_markstack_ptr = PL_markstack;
469	PL_markstack_max = PL_markstack + 16;	399	PL_markstack_max = PL_markstack + 16;
470		400
		401	#ifdef SET_MARK_OFFSET
471	SET_MARK_OFFSET;	402	SET_MARK_OFFSET;
		403	#endif
472		404
473	New(54,PL_scopestack,16,I32);	405	New(54,PL_scopestack,16,I32);
474	PL_scopestack_ix = 0;	406	PL_scopestack_ix = 0;
475	PL_scopestack_max = 16;	407	PL_scopestack_max = 16;
476		408
477	New(54,PL_savestack,96,ANY);	409	New(54,PL_savestack,96,ANY);
478	PL_savestack_ix = 0;	410	PL_savestack_ix = 0;
479	PL_savestack_max = 96;	411	PL_savestack_max = 96;
480		412
		413	#if !PERL_VERSION_ATLEAST (5,9,0)
481	New(54,PL_retstack,8,OP*);	414	New(54,PL_retstack,8,OP*);
482	PL_retstack_ix = 0;	415	PL_retstack_ix = 0;
483	PL_retstack_max = 8;	416	PL_retstack_max = 8;
		417	#endif
484	}	418	}
485		419
486	/*	420	/*
487	* destroy the stacks, the callchain etc...	421	* destroy the stacks, the callchain etc...
488	* still there is a memleak of 128 bytes...
489	*/	422	*/
490	STATIC void	423	static void
491	destroy_stacks(pTHX)	424	coro_destroy_stacks ()
492	{	425	{
		426	if (!IN_DESTRUCT)
		427	{
493	/* is this ugly, I ask? */	428	/* is this ugly, I ask? */
494	while (PL_scopestack_ix)	429	LEAVE_SCOPE (0);
495	LEAVE;
496		430
497	/* sure it is, but more important: is it correct?? :/ */	431	/* sure it is, but more important: is it correct?? :/ */
498	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
499	FREETMPS;	432	FREETMPS;
		433
		434	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
		435	}
500		436
501	while (PL_curstackinfo->si_next)	437	while (PL_curstackinfo->si_next)
502	PL_curstackinfo = PL_curstackinfo->si_next;	438	PL_curstackinfo = PL_curstackinfo->si_next;
503		439
504	while (PL_curstackinfo)	440	while (PL_curstackinfo)
505	{	441	{
506	PERL_SI *p = PL_curstackinfo->si_prev;	442	PERL_SI *p = PL_curstackinfo->si_prev;
507		443
508	{	444	{ /*D*//*remove*/
509	dSP;	445	dSP;
510	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	446	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511	PUTBACK; /* possibly superfluous */	447	PUTBACK; /* possibly superfluous */
512	}	448	}
513		449
514	if (PL_main_cv != Nullcv) /* don't during destruction. hack? */	450	if (!IN_DESTRUCT)
515	dounwind(-1);	451	{
516		452	dounwind (-1);/*D*//*remove*/
517	SvREFCNT_dec(PL_curstackinfo->si_stack);	453	SvREFCNT_dec (PL_curstackinfo->si_stack);
		454	}
		455
518	Safefree(PL_curstackinfo->si_cxstack);	456	Safefree (PL_curstackinfo->si_cxstack);
519	Safefree(PL_curstackinfo);	457	Safefree (PL_curstackinfo);
520	PL_curstackinfo = p;	458	PL_curstackinfo = p;
521	}	459	}
522		460
523	Safefree(PL_tmps_stack);	461	Safefree (PL_tmps_stack);
524	Safefree(PL_markstack);	462	Safefree (PL_markstack);
525	Safefree(PL_scopestack);	463	Safefree (PL_scopestack);
526	Safefree(PL_savestack);	464	Safefree (PL_savestack);
		465	#if !PERL_VERSION_ATLEAST (5,9,0)
527	Safefree(PL_retstack);	466	Safefree (PL_retstack);
528	}
529
530	static void
531	allocate_stack (Coro__State ctx, int alloc)
532	{
533	coro_stack *stack;
534
535	New (0, stack, 1, coro_stack);
536
537	stack->refcnt = 1;
538	stack->usecnt = 1;
539	stack->gencnt = ctx->gencnt = 0;
540	if (alloc)
541	{
542	#ifdef HAVE_MMAP
543	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
544	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
545	if (stack->sptr == (void *)-1)
546	#endif	467	#endif
547	{
548	/*FIXME*//*D*//* reasonable stack size! */
549	stack->ssize = -4096 * sizeof (long);
550	New (0, stack->sptr, 4096, long);
551	}
552	}
553	else
554	stack->sptr = 0;
555
556	ctx->stack = stack;
557	}	468	}
558		469
559	static void	470	static void
560	deallocate_stack (Coro__State ctx)	471	setup_coro (struct coro *coro)
561	{
562	coro_stack *stack = ctx->stack;
563
564	ctx->stack = 0;
565
566	if (stack)
567	{
568	if (!--stack->refcnt)
569	{
570	#ifdef HAVE_MMAP
571	if (stack->ssize > 0 && stack->sptr)
572	munmap (stack->sptr, stack->ssize);
573	else
574	#else
575	Safefree (stack->sptr);
576	#endif
577	Safefree (stack);
578	}
579	else if (ctx->gencnt == stack->gencnt)
580	--stack->usecnt;
581	}
582	}
583
584	static void
585	setup_coro (void *arg)
586	{	472	{
587	/*	473	/*
588	* emulate part of the perl startup here.	474	* emulate part of the perl startup here.
589	*/	475	*/
		476
		477	coro_init_stacks ();
		478
		479	PL_curcop = 0;
		480	PL_in_eval = 0;
		481	PL_curpm = 0;
		482
		483	{
		484	dSP;
		485	LOGOP myop;
		486
		487	/* I have no idea why this is needed, but it is */
		488	PUSHMARK (SP);
		489
		490	SvREFCNT_dec (GvAV (PL_defgv));
		491	GvAV (PL_defgv) = coro->args; coro->args = 0;
		492
		493	Zero (&myop, 1, LOGOP);
		494	myop.op_next = Nullop;
		495	myop.op_flags = OPf_WANT_VOID;
		496
		497	PL_op = (OP *)&myop;
		498
		499	PUSHMARK (SP);
		500	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		501	PUTBACK;
		502	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		503	SPAGAIN;
		504
		505	ENTER; /* necessary e.g. for dounwind */
		506	}
		507	}
		508
		509	static void
		510	free_coro_mortal ()
		511	{
		512	if (coro_mortal)
		513	{
		514	SvREFCNT_dec (coro_mortal);
		515	coro_mortal = 0;
		516	}
		517	}
		518
		519	static void NOINLINE
		520	prepare_cctx (coro_cctx *cctx)
		521	{
590	dSP;	522	dSP;
591	Coro__State ctx = (Coro__State)arg;	523	LOGOP myop;
592	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
593		524
594	coro_init_stacks (aTHX);	525	Zero (&myop, 1, LOGOP);
595	/*PL_curcop = 0;*/	526	myop.op_next = PL_op;
596	/*PL_in_eval = PL_in_eval;*/ /* inherit */	527	myop.op_flags = OPf_WANT_VOID;
597	SvREFCNT_dec (GvAV (PL_defgv));
598	GvAV (PL_defgv) = ctx->args;
599		528
		529	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		530
		531	PUSHMARK (SP);
		532	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		533	PUTBACK;
		534	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
600	SPAGAIN;	535	SPAGAIN;
601
602	if (ctx->stack)
603	{
604	ctx->cursp = 0;
605
606	PUSHMARK(SP);
607	PUTBACK;
608	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
609
610	if (SvTRUE (ERRSV))
611	croak (NULL);
612	else
613	croak ("FATAL: CCTXT coroutine returned!");
614	}
615	else
616	{
617	UNOP myop;
618
619	PL_op = (OP *)&myop;
620
621	Zero(&myop, 1, UNOP);
622	myop.op_next = Nullop;
623	myop.op_flags = OPf_WANT_VOID;
624
625	PUSHMARK(SP);
626	XPUSHs (sub_init);
627	/*
628	* the next line is slightly wrong, as PL_op->op_next
629	* is actually being executed so we skip the first op.
630	* that doesn't matter, though, since it is only
631	* pp_nextstate and we never return...
632	* ah yes, and I don't care anyways ;)
633	*/
634	PUTBACK;
635	PL_op = pp_entersub();
636	SPAGAIN;
637
638	ENTER; /* necessary e.g. for dounwind */
639	}
640	}	536	}
641		537
642	static void	538	static void
643	continue_coro (void *arg)	539	coro_run (void *arg)
644	{	540	{
		541	/* coro_run is the alternative epilogue of transfer() */
		542	UNLOCK;
		543
645	/*	544	/*
646	* this is a _very_ stripped down perl interpreter ;)	545	* this is a _very_ stripped down perl interpreter ;)
647	*/	546	*/
648	Coro__State ctx = (Coro__State)arg;	547	PL_top_env = &PL_start_env;
649		548
650	/*FIXME*//* must set up top_env here */	549	/* inject call to cctx_init */
651	ctx->cursp = 0;	550	prepare_cctx ((coro_cctx *)arg);
652	PL_op = PL_op->op_next;
653	CALLRUNOPS(aTHX);
654		551
		552	/* somebody will hit me for both perl_run and PL_restartop */
		553	perl_run (PL_curinterp);
		554
		555	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
655	abort ();	556	abort ();
656	}	557	}
657		558
658	STATIC void	559	static coro_cctx *
		560	cctx_new ()
		561	{
		562	coro_cctx *cctx;
		563
		564	++cctx_count;
		565
		566	New (0, cctx, 1, coro_cctx);
		567
		568	#if HAVE_MMAP
		569
		570	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		571	/* mmap suppsedly does allocate-on-write for us */
		572	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		573
		574	if (cctx->sptr == (void *)-1)
		575	{
		576	perror ("FATAL: unable to mmap stack for coroutine");
		577	_exit (EXIT_FAILURE);
		578	}
		579
		580	# if STACKGUARD
		581	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		582	# endif
		583
		584	#else
		585
		586	cctx->ssize = STACKSIZE * (long)sizeof (long);
		587	New (0, cctx->sptr, STACKSIZE, long);
		588
		589	if (!cctx->sptr)
		590	{
		591	perror ("FATAL: unable to malloc stack for coroutine");
		592	_exit (EXIT_FAILURE);
		593	}
		594
		595	#endif
		596
		597	#if USE_VALGRIND
		598	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		599	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		600	cctx->ssize + (char *)cctx->sptr
		601	);
		602	#endif
		603
		604	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		605
		606	return cctx;
		607	}
		608
		609	static void
		610	cctx_free (coro_cctx *cctx)
		611	{
		612	if (!cctx)
		613	return;
		614
		615	--cctx_count;
		616
		617	#if USE_VALGRIND
		618	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		619	#endif
		620
		621	#if HAVE_MMAP
		622	munmap (cctx->sptr, cctx->ssize);
		623	#else
		624	Safefree (cctx->sptr);
		625	#endif
		626
		627	Safefree (cctx);
		628	}
		629
		630	static coro_cctx *
		631	cctx_get ()
		632	{
		633	coro_cctx *cctx;
		634
		635	if (cctx_first)
		636	{
		637	--cctx_idle;
		638	cctx = cctx_first;
		639	cctx_first = cctx->next;
		640	}
		641	else
		642	{
		643	cctx = cctx_new ();
		644	PL_op = PL_op->op_next;
		645	}
		646
		647	return cctx;
		648	}
		649
		650	static void
		651	cctx_put (coro_cctx *cctx)
		652	{
		653	++cctx_idle;
		654	cctx->next = cctx_first;
		655	cctx_first = cctx;
		656	}
		657
		658	/* never call directly, always through the coro_state_transfer global variable */
		659	static void NOINLINE
659	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	660	transfer (struct coro *prev, struct coro *next, int flags)
660	{	661	{
661	dSTACKLEVEL;	662	dSTACKLEVEL;
662	static struct coro *xnext;
663		663
		664	/* sometimes transfer is only called to set idle_sp */
		665	if (flags == TRANSFER_SET_STACKLEVEL)
		666	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
664	if (prev != next)	667	else if (prev != next)
665	{	668	{
666	xnext = next;	669	coro_cctx *prev__cctx;
		670
		671	LOCK;
667		672
668	if (next->mainstack)	673	if (next->mainstack)
669	{	674	{
		675	/* coroutine already started */
670	SAVE (prev, flags);	676	SAVE (prev, flags);
671	LOAD (next);	677	LOAD (next);
672
673	/* mark this state as in-use */
674	next->mainstack = 0;
675	next->tmps_ix = -2;
676
677	/* stacklevel changed? if yes, grab the stack for us! */
678	if (flags & TRANSFER_SAVE_CCTXT)
679	{
680	if (!prev->stack)
681	allocate_stack (prev, 0);
682	else if (prev->cursp != stacklevel
683	&& prev->stack->usecnt > 1)
684	{
685	prev->gencnt = ++prev->stack->gencnt;
686	prev->stack->usecnt = 1;
687	}
688
689	/* has our stack been invalidated? */
690	if (next->stack && next->stack->gencnt != next->gencnt)
691	{
692	deallocate_stack (next);
693	allocate_stack (next, 1);
694	coro_create (&(next->stack->cctx),
695	continue_coro, (void *)next,
696	next->stack->sptr, labs (next->stack->ssize));
697	}
698
699	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
700	/* don't add any code here */
701	}
702
703	}	678	}
704	else if (next->tmps_ix == -2)
705	croak ("tried to transfer to running coroutine");
706	else	679	else
707	{	680	{
		681	/* need to start coroutine */
708	SAVE (prev, -1); /* first get rid of the old state */	682	/* first get rid of the old state */
709		683	SAVE (prev, -1);
710	if (flags & TRANSFER_SAVE_CCTXT)	684	/* setup coroutine call */
711	{
712	if (!prev->stack)
713	allocate_stack (prev, 0);
714
715	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
716	{
717	setup_coro (next);
718
719	prev->stack->refcnt++;
720	prev->stack->usecnt++;
721	next->stack = prev->stack;
722	next->gencnt = prev->gencnt;
723	}
724	else
725	{
726	allocate_stack (next, 1);
727	coro_create (&(next->stack->cctx),
728	setup_coro, (void *)next,
729	next->stack->sptr, labs (next->stack->ssize));
730	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
731	/* don't add any code here */
732	}
733	}
734	else
735	setup_coro (next);	685	setup_coro (next);
		686	/* need a stack */
		687	next->cctx = 0;
736	}	688	}
		689
		690	if (!prev->cctx)
		691	/* create a new empty context */
		692	Newz (0, prev->cctx, 1, coro_cctx);
		693
		694	prev__cctx = prev->cctx;
		695
		696	/* possibly "free" the cctx */
		697	if (prev__cctx->idle_sp == STACKLEVEL)
		698	{
		699	assert (PL_top_env == prev__cctx->top_env);//D
		700	cctx_put (prev__cctx);
		701	prev->cctx = 0;
		702	}
		703
		704	if (!next->cctx)
		705	next->cctx = cctx_get ();
		706
		707	if (prev__cctx != next->cctx)
		708	{
		709	prev__cctx->top_env = PL_top_env;
		710	PL_top_env = next->cctx->top_env;
		711	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		712	}
		713
		714	free_coro_mortal ();
		715
		716	UNLOCK;
737	}	717	}
738
739	/*
740	* xnext is now either prev or next, depending on wether
741	* we switched the c stack or not. that's why i use a global
742	* variable, that should become thread-specific at one point.
743	*/
744	xnext->cursp = stacklevel;
745	}	718	}
		719
		720	struct transfer_args
		721	{
		722	struct coro *prev, *next;
		723	int flags;
		724	};
		725
		726	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		727
		728	static void
		729	coro_state_destroy (struct coro *coro)
		730	{
		731	if (coro->refcnt--)
		732	return;
		733
		734	if (coro->mainstack && coro->mainstack != main_mainstack)
		735	{
		736	struct coro temp;
		737
		738	SAVE ((&temp), TRANSFER_SAVE_ALL);
		739	LOAD (coro);
		740
		741	coro_destroy_stacks ();
		742
		743	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		744
		745	coro->mainstack = 0;
		746	}
		747
		748	cctx_free (coro->cctx);
		749	SvREFCNT_dec (coro->args);
		750	Safefree (coro);
		751	}
		752
		753	static int
		754	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		755	{
		756	struct coro *coro = (struct coro *)mg->mg_ptr;
		757	mg->mg_ptr = 0;
		758
		759	coro_state_destroy (coro);
		760
		761	return 0;
		762	}
		763
		764	static int
		765	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		766	{
		767	struct coro *coro = (struct coro *)mg->mg_ptr;
		768
		769	++coro->refcnt;
		770
		771	return 0;
		772	}
		773
		774	static MGVTBL coro_state_vtbl = {
		775	0, 0, 0, 0,
		776	coro_state_clear,
		777	0,
		778	#ifdef MGf_DUP
		779	coro_state_dup,
		780	#else
		781	# define MGf_DUP 0
		782	#endif
		783	};
746		784
747	static struct coro *	785	static struct coro *
748	sv_to_coro (SV *arg, const char *funcname, const char *varname)	786	SvSTATE (SV *coro)
749	{	787	{
750	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	788	HV *stash;
		789	MAGIC *mg;
		790
		791	if (SvROK (coro))
		792	coro = SvRV (coro);
		793
		794	stash = SvSTASH (coro);
		795	if (stash != coro_stash && stash != coro_state_stash)
751	{	796	{
752	HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);	797	/* very slow, but rare, check */
753		798	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
754	if (!he)	799	croak ("Coro::State object required");
755	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
756
757	arg = HeVAL(he);
758	}	800	}
759
760	/* must also be changed inside Coro::Cont::yield */
761	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
762	return (struct coro *) SvIV((SV*)SvRV(arg));
763		801
764	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	802	mg = SvMAGIC (coro);
765	/*NORETURN*/	803	assert (mg->mg_type == PERL_MAGIC_ext);
		804	return (struct coro *)mg->mg_ptr;
766	}	805	}
767		806
768	static void	807	static void
		808	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		809	{
		810	ta->prev = SvSTATE (prev);
		811	ta->next = SvSTATE (next);
		812	ta->flags = flags;
		813	}
		814
		815	static void
769	api_transfer(pTHX_ SV *prev, SV *next, int flags)	816	api_transfer (SV *prev, SV *next, int flags)
770	{	817	{
771	transfer(aTHX_	818	dTHX;
772	sv_to_coro (prev, "Coro::transfer", "prev"),	819	struct transfer_args ta;
773	sv_to_coro (next, "Coro::transfer", "next"),	820
774	flags);	821	prepare_transfer (&ta, prev, next, flags);
		822	TRANSFER (ta);
775	}	823	}
776		824
777	/** Coro ********************************************************************/	825	/** Coro ********************************************************************/
778		826
779	#define PRIO_MAX 3	827	#define PRIO_MAX 3
…		…
783	#define PRIO_IDLE -3	831	#define PRIO_IDLE -3
784	#define PRIO_MIN -4	832	#define PRIO_MIN -4
785		833
786	/* for Coro.pm */	834	/* for Coro.pm */
787	static GV *coro_current, *coro_idle;	835	static GV *coro_current, *coro_idle;
788	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	836	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
789	static int coro_nready;	837	static int coro_nready;
790		838
791	static void	839	static void
792	coro_enq (SV *sv)	840	coro_enq (SV *sv)
793	{	841	{
794	if (SvROK (sv))	842	int prio;
795	{	843
796	SV *hv = SvRV (sv);
797	if (SvTYPE (hv) == SVt_PVHV)	844	if (SvTYPE (sv) != SVt_PVHV)
798	{
799	SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0);
800	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
801
802	prio = prio > PRIO_MAX ? PRIO_MAX
803	: prio < PRIO_MIN ? PRIO_MIN
804	: prio;
805
806	av_push (coro_ready [prio - PRIO_MIN], sv);
807	coro_nready++;
808
809	return;
810	}
811	}
812
813	croak ("Coro::ready tried to enqueue something that is not a coroutine");	845	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		846
		847	prio = SvSTATE (sv)->prio;
		848
		849	av_push (coro_ready [prio - PRIO_MIN], sv);
		850	coro_nready++;
814	}	851	}
815		852
816	static SV *	853	static SV *
817	coro_deq (int min_prio)	854	coro_deq (int min_prio)
818	{	855	{
…		…
821	min_prio -= PRIO_MIN;	858	min_prio -= PRIO_MIN;
822	if (min_prio < 0)	859	if (min_prio < 0)
823	min_prio = 0;	860	min_prio = 0;
824		861
825	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	862	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
826	if (av_len (coro_ready[prio]) >= 0)	863	if (AvFILLp (coro_ready [prio]) >= 0)
827	{	864	{
828	coro_nready--;	865	coro_nready--;
829	return av_shift (coro_ready[prio]);	866	return av_shift (coro_ready [prio]);
830	}	867	}
831		868
832	return 0;	869	return 0;
833	}	870	}
834		871
835	static void	872	static void
836	api_ready (SV *coro)	873	api_ready (SV *coro)
837	{	874	{
		875	dTHX;
		876
		877	if (SvROK (coro))
		878	coro = SvRV (coro);
		879
		880	LOCK;
838	coro_enq (SvREFCNT_inc (coro));	881	coro_enq (SvREFCNT_inc (coro));
		882	UNLOCK;
839	}	883	}
840		884
841	static void	885	static void
842	api_schedule (int cede)	886	prepare_schedule (struct transfer_args *ta)
843	{	887	{
844	SV *prev, *next;	888	SV *current, *prev, *next;
845		889
846	prev = GvSV (coro_current);	890	current = GvSV (coro_current);
847		891
848	if (cede)	892	for (;;)
849	coro_enq (SvREFCNT_inc (prev));	893	{
850		894	LOCK;
851	next = coro_deq (PRIO_MIN);	895	next = coro_deq (PRIO_MIN);
		896	UNLOCK;
852		897
853	if (!next)	898	if (next)
854	next = SvREFCNT_inc (GvSV (coro_idle));	899	break;
855		900
856	GvSV (coro_current) = SvREFCNT_inc (next);	901	{
857	transfer (aTHX_	902	dSP;
858	sv_to_coro (prev, "Coro::schedule", "current coroutine"),	903
859	sv_to_coro (next, "Coro::schedule", "next coroutine"),	904	ENTER;
860	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);	905	SAVETMPS;
861	SvREFCNT_dec (next);	906
862	SvREFCNT_dec (prev);	907	PUSHMARK (SP);
		908	PUTBACK;
		909	call_sv (GvSV (coro_idle), G_DISCARD);
		910
		911	FREETMPS;
		912	LEAVE;
		913	}
		914	}
		915
		916	prev = SvRV (current);
		917	SvRV (current) = next;
		918
		919	/* free this only after the transfer */
		920	LOCK;
		921	free_coro_mortal ();
		922	UNLOCK;
		923	coro_mortal = prev;
		924
		925	ta->prev = SvSTATE (prev);
		926	ta->next = SvSTATE (next);
		927	ta->flags = TRANSFER_SAVE_ALL;
		928	}
		929
		930	static void
		931	prepare_cede (struct transfer_args *ta)
		932	{
		933	LOCK;
		934	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		935	UNLOCK;
		936
		937	prepare_schedule (ta);
		938	}
		939
		940	static void
		941	api_schedule (void)
		942	{
		943	dTHX;
		944	struct transfer_args ta;
		945
		946	prepare_schedule (&ta);
		947	TRANSFER (ta);
		948	}
		949
		950	static void
		951	api_cede (void)
		952	{
		953	dTHX;
		954	struct transfer_args ta;
		955
		956	prepare_cede (&ta);
		957	TRANSFER (ta);
863	}	958	}
864		959
865	MODULE = Coro::State PACKAGE = Coro::State	960	MODULE = Coro::State PACKAGE = Coro::State
866		961
867	PROTOTYPES: ENABLE	962	PROTOTYPES: DISABLE
868		963
869	BOOT:	964	BOOT:
870	{ /* {} necessary for stoopid perl-5.6.x */	965	{
871	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	966	#ifdef USE_ITHREADS
872	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	967	MUTEX_INIT (&coro_mutex);
		968	#endif
		969	BOOT_PAGESIZE;
		970
873	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	971	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
874		972
875	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	973	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
876	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	974	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
877	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	975	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
878	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
879
880	if (!padlist_cache)
881	padlist_cache = newHV ();
882		976
883	main_mainstack = PL_mainstack;	977	main_mainstack = PL_mainstack;
884		978
885	coroapi.ver = CORO_API_VERSION;	979	coroapi.ver = CORO_API_VERSION;
886	coroapi.transfer = api_transfer;	980	coroapi.transfer = api_transfer;
887	}
888		981
889	Coro::State	982	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
890	_newprocess(args)	983	}
891	SV * args	984
892	PROTOTYPE: $	985	SV *
		986	new (char *klass, ...)
893	CODE:	987	CODE:
894	Coro__State coro;	988	{
		989	struct coro *coro;
		990	HV *hv;
		991	int i;
895		992
896	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
897	croak ("Coro::State::_newprocess expects an arrayref");
898
899	New (0, coro, 1, struct coro);	993	Newz (0, coro, 1, struct coro);
		994	coro->args = newAV ();
900		995
901	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	996	hv = newHV ();
902	coro->mainstack = 0; /* actual work is done inside transfer */	997	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
903	coro->stack = 0;	998	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
904		999
905	RETVAL = coro;	1000	for (i = 1; i < items; i++)
		1001	av_push (coro->args, newSVsv (ST (i)));
		1002	}
906	OUTPUT:	1003	OUTPUT:
907	RETVAL	1004	RETVAL
908		1005
909	void	1006	void
910	transfer(prev, next, flags)	1007	_set_stacklevel (...)
911	Coro::State_or_hashref prev	1008	ALIAS:
912	Coro::State_or_hashref next	1009	Coro::State::transfer = 1
913	int flags	1010	Coro::schedule = 2
914	PROTOTYPE: @	1011	Coro::cede = 3
		1012	Coro::Cont::yield = 4
915	CODE:	1013	CODE:
916	PUTBACK;	1014	{
917	transfer (aTHX_ prev, next, flags);	1015	struct transfer_args ta;
918	SPAGAIN;	1016
		1017	switch (ix)
		1018	{
		1019	case 0:
		1020	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1021	ta.next = 0;
		1022	ta.flags = TRANSFER_SET_STACKLEVEL;
		1023	break;
		1024
		1025	case 1:
		1026	if (items != 3)
		1027	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1028
		1029	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1030	break;
		1031
		1032	case 2:
		1033	prepare_schedule (&ta);
		1034	break;
		1035
		1036	case 3:
		1037	prepare_cede (&ta);
		1038	break;
		1039
		1040	case 4:
		1041	{
		1042	SV *yieldstack;
		1043	SV *sv;
		1044	AV *defav = GvAV (PL_defgv);
		1045
		1046	yieldstack = *hv_fetch (
		1047	(HV *)SvRV (GvSV (coro_current)),
		1048	"yieldstack", sizeof ("yieldstack") - 1,
		1049	0
		1050	);
		1051
		1052	/* set up @_ -- ugly */
		1053	av_clear (defav);
		1054	av_fill (defav, items - 1);
		1055	while (items--)
		1056	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1057
		1058	sv = av_pop ((AV *)SvRV (yieldstack));
		1059	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1060	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1061	ta.flags = 0;
		1062	SvREFCNT_dec (sv);
		1063	}
		1064	break;
		1065
		1066	}
		1067
		1068	TRANSFER (ta);
		1069	}
919		1070
920	void	1071	void
921	DESTROY(coro)	1072	_clone_state_from (SV *dst, SV *src)
922	Coro::State coro	1073	CODE:
923	CODE:	1074	{
		1075	struct coro *coro_src = SvSTATE (src);
924		1076
925	if (coro->mainstack && coro->mainstack != main_mainstack)	1077	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
926	{
927	struct coro temp;
928		1078
929	PUTBACK;	1079	++coro_src->refcnt;
930	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1080	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
931	LOAD(aTHX_ coro);	1081	}
932	SPAGAIN;
933
934	destroy_stacks (aTHX);
935
936	LOAD((&temp)); /* this will get rid of defsv etc.. */
937	SPAGAIN;
938
939	coro->mainstack = 0;
940	}
941
942	deallocate_stack (coro);
943
944	Safefree (coro);
945		1082
946	void	1083	void
947	flush()
948	CODE:
949	#ifdef MAY_FLUSH
950	flush_padlist_cache ();
951	#endif
952
953	void
954	_exit(code)	1084	_exit (code)
955	int code	1085	int code
956	PROTOTYPE: $	1086	PROTOTYPE: $
957	CODE:	1087	CODE:
958	#if defined(__GLIBC__) || _POSIX_C_SOURCE
959	_exit (code);	1088	_exit (code);
960	#else
961	signal (SIGTERM, SIG_DFL);
962	raise (SIGTERM);
963	exit (code);
964	#endif
965		1089
966	MODULE = Coro::State PACKAGE = Coro::Cont	1090	int
		1091	cctx_count ()
		1092	CODE:
		1093	RETVAL = cctx_count;
		1094	OUTPUT:
		1095	RETVAL
967		1096
968	# this is slightly dirty (should expose a c-level api)	1097	int
969		1098	cctx_idle ()
970	void	1099	CODE:
971	yield(...)	1100	RETVAL = cctx_idle;
972	PROTOTYPE: @	1101	OUTPUT:
973	CODE:	1102	RETVAL
974	static SV *returnstk;
975	SV *sv;
976	AV *defav = GvAV (PL_defgv);
977	struct coro *prev, *next;
978
979	if (!returnstk)
980	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
981
982	/* set up @_ -- ugly */
983	av_clear (defav);
984	av_fill (defav, items - 1);
985	while (items--)
986	av_store (defav, items, SvREFCNT_inc (ST(items)));
987
988	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
989	sv = av_pop ((AV *)SvRV (returnstk));
990	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
991	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
992	SvREFCNT_dec (sv);
993
994	transfer(aTHX_ prev, next, 0);
995		1103
996	MODULE = Coro::State PACKAGE = Coro	1104	MODULE = Coro::State PACKAGE = Coro
997		1105
998	# this is slightly dirty (should expose a c-level api)
999
1000	BOOT:	1106	BOOT:
1001	{	1107	{
1002	int i;	1108	int i;
		1109
1003	HV *stash = gv_stashpv ("Coro", TRUE);	1110	coro_stash = gv_stashpv ("Coro", TRUE);
1004		1111
1005	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1112	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1006	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1113	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1007	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1114	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1008	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1115	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1009	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1116	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1010	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1117	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1011		1118
1012	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1119	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1013	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1120	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1014		1121
1015	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1122	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1017		1124
1018	{	1125	{
1019	SV *sv = perl_get_sv("Coro::API", 1);	1126	SV *sv = perl_get_sv("Coro::API", 1);
1020		1127
1021	coroapi.schedule = api_schedule;	1128	coroapi.schedule = api_schedule;
		1129	coroapi.cede = api_cede;
1022	coroapi.ready = api_ready;	1130	coroapi.ready = api_ready;
1023	coroapi.nready = &coro_nready;	1131	coroapi.nready = &coro_nready;
1024	coroapi.current = coro_current;	1132	coroapi.current = coro_current;
1025		1133
1026	GCoroAPI = &coroapi;	1134	GCoroAPI = &coroapi;
1027	sv_setiv(sv, (IV)&coroapi);	1135	sv_setiv (sv, (IV)&coroapi);
1028	SvREADONLY_on(sv);	1136	SvREADONLY_on (sv);
1029	}	1137	}
1030	}	1138	}
1031		1139
		1140	int
		1141	prio (Coro::State coro, int newprio = 0)
		1142	ALIAS:
		1143	nice = 1
		1144	CODE:
		1145	{
		1146	RETVAL = coro->prio;
		1147
		1148	if (items > 1)
		1149	{
		1150	if (ix)
		1151	newprio += coro->prio;
		1152
		1153	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1154	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1155
		1156	coro->prio = newprio;
		1157	}
		1158	}
		1159
1032	void	1160	void
1033	ready(self)	1161	ready (SV *self)
1034	SV * self	1162	PROTOTYPE: $
1035	CODE:	1163	CODE:
1036	api_ready (self);	1164	api_ready (self);
1037		1165
1038	int	1166	int
1039	nready(...)	1167	nready (...)
1040	PROTOTYPE:	1168	PROTOTYPE:
1041	CODE:	1169	CODE:
1042	RETVAL = coro_nready;	1170	RETVAL = coro_nready;
1043	OUTPUT:	1171	OUTPUT:
1044	RETVAL	1172	RETVAL
1045		1173
		1174	MODULE = Coro::State PACKAGE = Coro::AIO
		1175
		1176	SV *
		1177	_get_state ()
		1178	CODE:
		1179	{
		1180	struct {
		1181	int errorno;
		1182	int laststype;
		1183	int laststatval;
		1184	Stat_t statcache;
		1185	} data;
		1186
		1187	data.errorno = errno;
		1188	data.laststype = PL_laststype;
		1189	data.laststatval = PL_laststatval;
		1190	data.statcache = PL_statcache;
		1191
		1192	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1193	}
		1194	OUTPUT:
		1195	RETVAL
		1196
1046	void	1197	void
1047	schedule(...)	1198	_set_state (char *data_)
1048	PROTOTYPE:	1199	PROTOTYPE: $
1049	ALIAS:
1050	cede = 1
1051	CODE:	1200	CODE:
1052	api_schedule (ix);	1201	{
		1202	struct {
		1203	int errorno;
		1204	int laststype;
		1205	int laststatval;
		1206	Stat_t statcache;
		1207	} *data = (void *)data_;
1053		1208
		1209	errno = data->errorno;
		1210	PL_laststype = data->laststype;
		1211	PL_laststatval = data->laststatval;
		1212	PL_statcache = data->statcache;
		1213	}

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