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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.35 by root, Mon Sep 24 01:36:20 2001 UTC vs.
Revision 1.108 by root, Mon Nov 27 18:15:47 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 IN_DESTRUCT (PL_main_cv == Nullcv)	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
32		81
33	#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))
34		89
35	#include "CoroAPI.h"	90	#include "CoroAPI.h"
36		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
37	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 */
38		107
39	/* 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 */
40	typedef struct {	112	typedef struct coro_cctx {
41	int refcnt; /* pointer reference counter */	113	struct coro_cctx *next;
42	int usecnt; /* shared by how many coroutines */
43	int gencnt; /* generation counter */
44		114
45	coro_context cctx;	115	/* the stack */
46
47	void *sptr;	116	void *sptr;
48	long ssize; /* positive == mmap, otherwise malloc */	117	long ssize; /* positive == mmap, otherwise malloc */
49	} coro_stack;
50		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 */
51	struct coro {	130	struct coro {
52	/* the optional C context */	131	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	132	coro_cctx *cctx;
54	void *cursp;	133
		134	/* data associated with this coroutine (initial args) */
		135	AV *args;
55	int gencnt;	136	int refcnt;
56		137
57	/* optionally saved, might be zero */	138	/* optionally saved, might be zero */
58	AV *defav;	139	AV *defav;
59	SV *defsv;	140	SV *defsv;
60	SV *errsv;	141	SV *errsv;
61		142
62	/* saved global state not related to stacks */	143	#define VAR(name,type) type name;
63	U8 dowarn;	144	# include "state.h"
64	I32 in_eval;	145	#undef VAR
65		146
66	/* the stacks and related info (callchain etc..) */	147	/* coro process data */
67	PERL_SI *curstackinfo;	148	int prio;
68	AV *curstack;
69	AV *mainstack;
70	SV **stack_sp;
71	OP *op;
72	SV **curpad;
73	SV **stack_base;
74	SV **stack_max;
75	SV **tmps_stack;
76	I32 tmps_floor;
77	I32 tmps_ix;
78	I32 tmps_max;
79	I32 *markstack;
80	I32 *markstack_ptr;
81	I32 *markstack_max;
82	I32 *scopestack;
83	I32 scopestack_ix;
84	I32 scopestack_max;
85	ANY *savestack;
86	I32 savestack_ix;
87	I32 savestack_max;
88	OP **retstack;
89	I32 retstack_ix;
90	I32 retstack_max;
91	COP *curcop;
92	JMPENV *top_env;
93
94	/* data associated with this coroutine (initial args) */
95	AV *args;
96	};	149	};
97		150
98	typedef struct coro *Coro__State;	151	typedef struct coro *Coro__State;
99	typedef struct coro *Coro__State_or_hashref;	152	typedef struct coro *Coro__State_or_hashref;
100		153
101	static AV *main_mainstack; /* used to differentiate between $main and others */	154	static AV *
102	static HV *coro_state_stash;	155	coro_clone_padlist (CV *cv)
103	static SV *ucoro_state_sv;
104	static U32 ucoro_state_hash;
105	static HV *padlist_cache;
106
107	/* mostly copied from op.c:cv_clone2 */
108	STATIC AV *
109	clone_padlist (AV *protopadlist)
110	{	156	{
111	AV *av;	157	AV *padlist = CvPADLIST (cv);
112	I32 ix;
113	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
114	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
115	SV **pname = AvARRAY (protopad_name);
116	SV **ppad = AvARRAY (protopad);
117	I32 fname = AvFILLp (protopad_name);
118	I32 fpad = AvFILLp (protopad);
119	AV *newpadlist, *newpad_name, *newpad;	158	AV *newpadlist, *newpad;
120	SV **npad;
121
122	newpad_name = newAV ();
123	for (ix = fname; ix >= 0; ix--)
124	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
125
126	newpad = newAV ();
127	av_fill (newpad, AvFILLp (protopad));
128	npad = AvARRAY (newpad);
129		159
130	newpadlist = newAV ();	160	newpadlist = newAV ();
131	AvREAL_off (newpadlist);	161	AvREAL_off (newpadlist);
132	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)));
133	av_store (newpadlist, 1, (SV *) newpad);	171	av_store (newpadlist, 1, (SV *)newpad);
134		172
135	av = newAV (); /* will be @_ */	173	return newpadlist;
136	av_extend (av, 0);	174	}
137	av_store (newpad, 0, (SV *) av);
138	AvFLAGS (av) = AVf_REIFY;
139		175
140	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))
141	{	181	{
142	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	182	I32 i = AvFILLp (padlist);
143	if (namesv && namesv != &PL_sv_undef)	183	while (i >= 0)
144	{	184	{
145	char *name = SvPVX (namesv); /* XXX */	185	SV **svp = av_fetch (padlist, i--, FALSE);
146	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	186	if (svp)
147	{ /* lexical from outside? */
148	npad[ix] = SvREFCNT_inc (ppad[ix]);
149	}	187	{
150	else
151	{ /* our own lexical */
152	SV *sv;	188	SV *sv;
153	if (*name == '&')	189	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
154	sv = SvREFCNT_inc (ppad[ix]);	190	SvREFCNT_dec (sv);
155	else if (*name == '@')	191
156	sv = (SV *) newAV ();	192	SvREFCNT_dec (*svp);
157	else if (*name == '%')
158	sv = (SV *) newHV ();
159	else
160	sv = NEWSV (0, 0);
161	if (!SvPADBUSY (sv))
162	SvPADMY_on (sv);
163	npad[ix] = sv;
164	}	193	}
165	}	194	}
166	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	195
167	{	196	SvREFCNT_dec ((SV*)padlist);
168	npad[ix] = SvREFCNT_inc (ppad[ix]);
169	}
170	else
171	{
172	SV *sv = NEWSV (0, 0);
173	SvPADTMP_on (sv);
174	npad[ix] = sv;
175	}
176	}	197	}
		198	}
177		199
178	#if 0 /* return -ENOTUNDERSTOOD */	200	static int
179	/* 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;
180		205
181	for (ix = fpad; ix > 0; ix--) {	206	/* casting is fun. */
182	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	207	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
183	if (namesv	208	free_padlist (padlist);
184	&& namesv != &PL_sv_undef	209
185	&& !(SvFLAGS(namesv) & SVf_FAKE)	210	SvREFCNT_dec (av);
186	&& *SvPVX(namesv) == '&'	211
187	&& CvCLONE(ppad[ix]))	212	return 0;
188	{	213	}
189	CV *kid = cv_clone((CV*)ppad[ix]);	214
190	SvREFCNT_dec(ppad[ix]);	215	#define PERL_MAGIC_coro PERL_MAGIC_ext
191	CvCLONE_on(kid);	216
192	SvPADMY_on(kid);	217	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
193	npad[ix] = (SV*)kid;	218
194	}	219	/* the next two functions merely cache the padlists */
		220	static void
		221	get_padlist (CV *cv)
		222	{
		223	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		224
		225	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
		226	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
		227	else
		228	{
		229	#if 0
		230	/* this is probably cleaner, but also slower? */
		231	CV *cp = Perl_cv_clone (cv);
		232	CvPADLIST (cv) = CvPADLIST (cp);
		233	CvPADLIST (cp) = 0;
		234	SvREFCNT_dec (cp);
		235	#else
		236	CvPADLIST (cv) = coro_clone_padlist (cv);
		237	#endif
		238	}
		239	}
		240
		241	static void
		242	put_padlist (CV *cv)
		243	{
		244	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		245
		246	if (!mg)
		247	{
		248	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		249	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		250	mg->mg_virtual = &vtbl_coro;
		251	mg->mg_obj = (SV *)newAV ();
195	}	252	}
196	#endif
197		253
198	return newpadlist;
199	}
200
201	#ifdef MAY_FLUSH
202	STATIC void
203	free_padlist (AV *padlist)
204	{
205	/* may be during global destruction */
206	if (SvREFCNT(padlist))
207	{
208	I32 i = AvFILLp(padlist);
209	while (i >= 0)
210	{
211	SV **svp = av_fetch(padlist, i--, FALSE);
212	SV *sv = svp ? *svp : Nullsv;
213	if (sv)
214	SvREFCNT_dec(sv);
215	}
216
217	SvREFCNT_dec((SV*)padlist);
218	}
219	}
220	#endif
221
222	/* the next two functions merely cache the padlists */
223	STATIC void
224	get_padlist (CV *cv)
225	{
226	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
227
228	if (he && AvFILLp ((AV *)*he) >= 0)
229	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
230	else
231	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
232	}
233
234	STATIC void
235	put_padlist (CV *cv)
236	{
237	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
238
239	if (SvTYPE (*he) != SVt_PVAV)
240	{
241	SvREFCNT_dec (*he);
242	*he = (SV *)newAV ();
243	}
244
245	av_push ((AV *)*he, (SV *)CvPADLIST (cv));	254	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
246	}	255	}
247
248	#ifdef MAY_FLUSH
249	STATIC void
250	flush_padlist_cache ()
251	{
252	HV *hv = padlist_cache;
253	padlist_cache = newHV ();
254
255	if (hv_iterinit (hv))
256	{
257	HE *he;
258	AV *padlist;
259
260	while (!!(he = hv_iternext (hv)))
261	{
262	AV *av = (AV *)HeVAL(he);
263
264	/* casting is fun. */
265	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
266	free_padlist (padlist);
267	}
268	}
269
270	SvREFCNT_dec (hv);
271	}
272	#endif
273		256
274	#define SB do {	257	#define SB do {
275	#define SE } while (0)	258	#define SE } while (0)
276		259
277	#define LOAD(state) load_state(aTHX_ (state));	260	#define LOAD(state) load_state((state));
278	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	261	#define SAVE(state,flags) save_state((state),(flags));
279		262
280	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	263	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
281		264
282	static void	265	static void
283	load_state(pTHX_ Coro__State c)	266	load_state(Coro__State c)
284	{	267	{
285	PL_dowarn = c->dowarn;	268	#define VAR(name,type) PL_ ## name = c->name;
286	PL_in_eval = c->in_eval;	269	# include "state.h"
287		270	#undef VAR
288	PL_curstackinfo = c->curstackinfo;
289	PL_curstack = c->curstack;
290	PL_mainstack = c->mainstack;
291	PL_stack_sp = c->stack_sp;
292	PL_op = c->op;
293	PL_curpad = c->curpad;
294	PL_stack_base = c->stack_base;
295	PL_stack_max = c->stack_max;
296	PL_tmps_stack = c->tmps_stack;
297	PL_tmps_floor = c->tmps_floor;
298	PL_tmps_ix = c->tmps_ix;
299	PL_tmps_max = c->tmps_max;
300	PL_markstack = c->markstack;
301	PL_markstack_ptr = c->markstack_ptr;
302	PL_markstack_max = c->markstack_max;
303	PL_scopestack = c->scopestack;
304	PL_scopestack_ix = c->scopestack_ix;
305	PL_scopestack_max = c->scopestack_max;
306	PL_savestack = c->savestack;
307	PL_savestack_ix = c->savestack_ix;
308	PL_savestack_max = c->savestack_max;
309	PL_retstack = c->retstack;
310	PL_retstack_ix = c->retstack_ix;
311	PL_retstack_max = c->retstack_max;
312	PL_curcop = c->curcop;
313	PL_top_env = c->top_env;
314		271
315	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	272	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
316	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	273	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
317	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	274	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
318		275
…		…
327		284
328	if (padlist)	285	if (padlist)
329	{	286	{
330	put_padlist (cv); /* mark this padlist as available */	287	put_padlist (cv); /* mark this padlist as available */
331	CvPADLIST(cv) = padlist;	288	CvPADLIST(cv) = padlist;
332	#ifdef USE_THREADS
333	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
334	#endif
335	}	289	}
336		290
337	++CvDEPTH(cv);	291	++CvDEPTH(cv);
338	}	292	}
339		293
340	PUTBACK;	294	PUTBACK;
341	}	295	}
342	}	296	}
343		297
344	static void	298	static void
345	save_state(pTHX_ Coro__State c, int flags)	299	save_state(Coro__State c, int flags)
346	{	300	{
347	{	301	{
348	dSP;	302	dSP;
349	I32 cxix = cxstack_ix;	303	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	304	PERL_CONTEXT *ccstk = cxstack;
…		…
366	if (CxTYPE(cx) == CXt_SUB)	320	if (CxTYPE(cx) == CXt_SUB)
367	{	321	{
368	CV *cv = cx->blk_sub.cv;	322	CV *cv = cx->blk_sub.cv;
369	if (CvDEPTH(cv))	323	if (CvDEPTH(cv))
370	{	324	{
371	#ifdef USE_THREADS
372	/*XPUSHs ((SV *)CvOWNER(cv));*/
373	/*CvOWNER(cv) = 0;*/
374	/*error must unlock this cv etc.. etc...*/
375	#endif
376	EXTEND (SP, CvDEPTH(cv)*2);	325	EXTEND (SP, CvDEPTH(cv)*2);
377		326
378	while (--CvDEPTH(cv))	327	while (--CvDEPTH(cv))
379	{	328	{
380	/* this tells the restore code to increment CvDEPTH */	329	/* this tells the restore code to increment CvDEPTH */
…		…
383	}	332	}
384		333
385	PUSHs ((SV *)CvPADLIST(cv));	334	PUSHs ((SV *)CvPADLIST(cv));
386	PUSHs ((SV *)cv);	335	PUSHs ((SV *)cv);
387		336
388	get_padlist (cv); /* this is a monster */	337	get_padlist (cv);
389	}	338	}
390	}	339	}
		340	#ifdef CXt_FORMAT
391	else if (CxTYPE(cx) == CXt_FORMAT)	341	else if (CxTYPE(cx) == CXt_FORMAT)
392	{	342	{
393	/* I never used formats, so how should I know how these are implemented? */	343	/* I never used formats, so how should I know how these are implemented? */
394	/* my bold guess is as a simple, plain sub... */	344	/* my bold guess is as a simple, plain sub... */
395	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	345	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
396	}	346	}
		347	#endif
397	}	348	}
398		349
399	if (top_si->si_type == PERLSI_MAIN)	350	if (top_si->si_type == PERLSI_MAIN)
400	break;	351	break;
401		352
…		…
409		360
410	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	361	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
411	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	362	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
412	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	363	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
413		364
414	c->dowarn = PL_dowarn;	365	#define VAR(name,type)c->name = PL_ ## name;
415	c->in_eval = PL_in_eval;	366	# include "state.h"
416		367	#undef VAR
417	c->curstackinfo = PL_curstackinfo;
418	c->curstack = PL_curstack;
419	c->mainstack = PL_mainstack;
420	c->stack_sp = PL_stack_sp;
421	c->op = PL_op;
422	c->curpad = PL_curpad;
423	c->stack_base = PL_stack_base;
424	c->stack_max = PL_stack_max;
425	c->tmps_stack = PL_tmps_stack;
426	c->tmps_floor = PL_tmps_floor;
427	c->tmps_ix = PL_tmps_ix;
428	c->tmps_max = PL_tmps_max;
429	c->markstack = PL_markstack;
430	c->markstack_ptr = PL_markstack_ptr;
431	c->markstack_max = PL_markstack_max;
432	c->scopestack = PL_scopestack;
433	c->scopestack_ix = PL_scopestack_ix;
434	c->scopestack_max = PL_scopestack_max;
435	c->savestack = PL_savestack;
436	c->savestack_ix = PL_savestack_ix;
437	c->savestack_max = PL_savestack_max;
438	c->retstack = PL_retstack;
439	c->retstack_ix = PL_retstack_ix;
440	c->retstack_max = PL_retstack_max;
441	c->curcop = PL_curcop;
442	c->top_env = PL_top_env;
443	}	368	}
444		369
445	/*	370	/*
446	* allocate various perl stacks. This is an exact copy	371	* allocate various perl stacks. This is an exact copy
447	* of perl.c:init_stacks, except that it uses less memory	372	* of perl.c:init_stacks, except that it uses less memory
448	* on the assumption that coroutines do not usually need	373	* on the (sometimes correct) assumption that coroutines do
449	* a lot of stackspace.	374	* not usually need a lot of stackspace.
450	*/	375	*/
451	STATIC void	376	static void
452	coro_init_stacks (pTHX)	377	coro_init_stacks ()
453	{	378	{
454	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	379	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
455	PL_curstackinfo->si_type = PERLSI_MAIN;	380	PL_curstackinfo->si_type = PERLSI_MAIN;
456	PL_curstack = PL_curstackinfo->si_stack;	381	PL_curstack = PL_curstackinfo->si_stack;
457	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	382	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
467		392
468	New(54,PL_markstack,16,I32);	393	New(54,PL_markstack,16,I32);
469	PL_markstack_ptr = PL_markstack;	394	PL_markstack_ptr = PL_markstack;
470	PL_markstack_max = PL_markstack + 16;	395	PL_markstack_max = PL_markstack + 16;
471		396
		397	#ifdef SET_MARK_OFFSET
472	SET_MARK_OFFSET;	398	SET_MARK_OFFSET;
		399	#endif
473		400
474	New(54,PL_scopestack,16,I32);	401	New(54,PL_scopestack,16,I32);
475	PL_scopestack_ix = 0;	402	PL_scopestack_ix = 0;
476	PL_scopestack_max = 16;	403	PL_scopestack_max = 16;
477		404
478	New(54,PL_savestack,96,ANY);	405	New(54,PL_savestack,96,ANY);
479	PL_savestack_ix = 0;	406	PL_savestack_ix = 0;
480	PL_savestack_max = 96;	407	PL_savestack_max = 96;
481		408
		409	#if !PERL_VERSION_ATLEAST (5,9,0)
482	New(54,PL_retstack,8,OP*);	410	New(54,PL_retstack,8,OP*);
483	PL_retstack_ix = 0;	411	PL_retstack_ix = 0;
484	PL_retstack_max = 8;	412	PL_retstack_max = 8;
		413	#endif
485	}	414	}
486		415
487	/*	416	/*
488	* destroy the stacks, the callchain etc...	417	* destroy the stacks, the callchain etc...
489	* still there is a memleak of 128 bytes...
490	*/	418	*/
491	STATIC void	419	static void
492	destroy_stacks(pTHX)	420	coro_destroy_stacks ()
493	{	421	{
494	if (!IN_DESTRUCT)	422	if (!IN_DESTRUCT)
495	{	423	{
496	/* is this ugly, I ask? */	424	/* is this ugly, I ask? */
497	while (PL_scopestack_ix)	425	LEAVE_SCOPE (0);
498	LEAVE;
499		426
500	/* sure it is, but more important: is it correct?? :/ */	427	/* sure it is, but more important: is it correct?? :/ */
501	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
502	FREETMPS;	428	FREETMPS;
		429
		430	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
503	}	431	}
504		432
505	while (PL_curstackinfo->si_next)	433	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	434	PL_curstackinfo = PL_curstackinfo->si_next;
507		435
508	while (PL_curstackinfo)	436	while (PL_curstackinfo)
509	{	437	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	438	PERL_SI *p = PL_curstackinfo->si_prev;
511		439
512	{	440	{ /*D*//*remove*/
513	dSP;	441	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	442	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */	443	PUTBACK; /* possibly superfluous */
516	}	444	}
517		445
518	if (!IN_DESTRUCT)	446	if (!IN_DESTRUCT)
519	{	447	{
520	dounwind(-1);	448	dounwind (-1);/*D*//*remove*/
521	SvREFCNT_dec(PL_curstackinfo->si_stack);	449	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}	450	}
523		451
524	Safefree(PL_curstackinfo->si_cxstack);	452	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree(PL_curstackinfo);	453	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	454	PL_curstackinfo = p;
527	}	455	}
528		456
529	Safefree(PL_tmps_stack);	457	Safefree (PL_tmps_stack);
530	Safefree(PL_markstack);	458	Safefree (PL_markstack);
531	Safefree(PL_scopestack);	459	Safefree (PL_scopestack);
532	Safefree(PL_savestack);	460	Safefree (PL_savestack);
		461	#if !PERL_VERSION_ATLEAST (5,9,0)
533	Safefree(PL_retstack);	462	Safefree (PL_retstack);
534	}
535
536	static void
537	allocate_stack (Coro__State ctx, int alloc)
538	{
539	coro_stack *stack;
540
541	New (0, stack, 1, coro_stack);
542
543	stack->refcnt = 1;
544	stack->usecnt = 1;
545	stack->gencnt = ctx->gencnt = 0;
546	if (alloc)
547	{
548	#ifdef HAVE_MMAP
549	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
551	if (stack->sptr == (void *)-1)
552	#endif	463	#endif
553	{
554	/*FIXME*//*D*//* reasonable stack size! */
555	stack->ssize = -4096 * sizeof (long);
556	New (0, stack->sptr, 4096, long);
557	}
558	}
559	else
560	stack->sptr = 0;
561
562	ctx->stack = stack;
563	}	464	}
564		465
565	static void	466	static void
566	deallocate_stack (Coro__State ctx)	467	setup_coro (struct coro *coro)
567	{
568	coro_stack *stack = ctx->stack;
569
570	ctx->stack = 0;
571
572	if (stack)
573	{
574	if (!--stack->refcnt)
575	{
576	#ifdef HAVE_MMAP
577	if (stack->ssize > 0 && stack->sptr)
578	munmap (stack->sptr, stack->ssize);
579	else
580	#else
581	Safefree (stack->sptr);
582	#endif
583	Safefree (stack);
584	}
585	else if (ctx->gencnt == stack->gencnt)
586	--stack->usecnt;
587	}
588	}
589
590	static void
591	setup_coro (void *arg)
592	{	468	{
593	/*	469	/*
594	* emulate part of the perl startup here.	470	* emulate part of the perl startup here.
595	*/	471	*/
		472
		473	coro_init_stacks ();
		474
		475	PL_curcop = 0;
		476	PL_in_eval = 0;
		477	PL_curpm = 0;
		478
		479	{
		480	dSP;
		481	LOGOP myop;
		482
		483	/* I have no idea why this is needed, but it is */
		484	PUSHMARK (SP);
		485
		486	SvREFCNT_dec (GvAV (PL_defgv));
		487	GvAV (PL_defgv) = coro->args; coro->args = 0;
		488
		489	Zero (&myop, 1, LOGOP);
		490	myop.op_next = Nullop;
		491	myop.op_flags = OPf_WANT_VOID;
		492
		493	PL_op = (OP *)&myop;
		494
		495	PUSHMARK (SP);
		496	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		497	PUTBACK;
		498	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		499	SPAGAIN;
		500
		501	ENTER; /* necessary e.g. for dounwind */
		502	}
		503	}
		504
		505	static void
		506	free_coro_mortal ()
		507	{
		508	if (coro_mortal)
		509	{
		510	SvREFCNT_dec (coro_mortal);
		511	coro_mortal = 0;
		512	}
		513	}
		514
		515	static void NOINLINE
		516	prepare_cctx (coro_cctx *cctx)
		517	{
596	dSP;	518	dSP;
597	Coro__State ctx = (Coro__State)arg;	519	LOGOP myop;
598	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
599		520
600	coro_init_stacks (aTHX);	521	Zero (&myop, 1, LOGOP);
601	/*PL_curcop = 0;*/	522	myop.op_next = PL_op;
602	/*PL_in_eval = PL_in_eval;*/ /* inherit */	523	myop.op_flags = OPf_WANT_VOID;
603	SvREFCNT_dec (GvAV (PL_defgv));
604	GvAV (PL_defgv) = ctx->args;
605		524
		525	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		526
		527	PUSHMARK (SP);
		528	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		529	PUTBACK;
		530	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
606	SPAGAIN;	531	SPAGAIN;
607
608	if (ctx->stack)
609	{
610	ctx->cursp = 0;
611
612	PUSHMARK(SP);
613	PUTBACK;
614	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
615
616	if (SvTRUE (ERRSV))
617	croak (NULL);
618	else
619	croak ("FATAL: CCTXT coroutine returned!");
620	}
621	else
622	{
623	UNOP myop;
624
625	PL_op = (OP *)&myop;
626
627	Zero(&myop, 1, UNOP);
628	myop.op_next = Nullop;
629	myop.op_flags = OPf_WANT_VOID;
630
631	PUSHMARK(SP);
632	XPUSHs (sub_init);
633	/*
634	* the next line is slightly wrong, as PL_op->op_next
635	* is actually being executed so we skip the first op.
636	* that doesn't matter, though, since it is only
637	* pp_nextstate and we never return...
638	* ah yes, and I don't care anyways ;)
639	*/
640	PUTBACK;
641	PL_op = pp_entersub();
642	SPAGAIN;
643
644	ENTER; /* necessary e.g. for dounwind */
645	}
646	}	532	}
647		533
648	static void	534	static void
649	continue_coro (void *arg)	535	coro_run (void *arg)
650	{	536	{
		537	/* coro_run is the alternative epilogue of transfer() */
		538	UNLOCK;
		539
651	/*	540	/*
652	* this is a _very_ stripped down perl interpreter ;)	541	* this is a _very_ stripped down perl interpreter ;)
653	*/	542	*/
654	Coro__State ctx = (Coro__State)arg;
655	JMPENV coro_start_env;
656
657	/* same as JMPENV_BOOTSTRAP */
658	Zero(&coro_start_env, 1, JMPENV);
659	coro_start_env.je_ret = -1;
660	coro_start_env.je_mustcatch = TRUE;
661	PL_top_env = &coro_start_env;	543	PL_top_env = &PL_start_env;
662		544
663	ctx->cursp = 0;	545	/* inject call to cctx_init */
664	PL_op = PL_op->op_next;	546	prepare_cctx ((coro_cctx *)arg);
665	CALLRUNOPS(aTHX);
666		547
		548	/* somebody will hit me for both perl_run and PL_restartop */
		549	perl_run (PL_curinterp);
		550
		551	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
667	abort ();	552	abort ();
668	}	553	}
669		554
670	STATIC void	555	static coro_cctx *
		556	cctx_new ()
		557	{
		558	coro_cctx *cctx;
		559
		560	++cctx_count;
		561
		562	New (0, cctx, 1, coro_cctx);
		563
		564	#if HAVE_MMAP
		565
		566	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		567	/* mmap suppsedly does allocate-on-write for us */
		568	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		569
		570	if (cctx->sptr == (void *)-1)
		571	{
		572	perror ("FATAL: unable to mmap stack for coroutine");
		573	_exit (EXIT_FAILURE);
		574	}
		575
		576	# if STACKGUARD
		577	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		578	# endif
		579
		580	#else
		581
		582	cctx->ssize = STACKSIZE * (long)sizeof (long);
		583	New (0, cctx->sptr, STACKSIZE, long);
		584
		585	if (!cctx->sptr)
		586	{
		587	perror ("FATAL: unable to malloc stack for coroutine");
		588	_exit (EXIT_FAILURE);
		589	}
		590
		591	#endif
		592
		593	#if USE_VALGRIND
		594	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		595	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		596	cctx->ssize + (char *)cctx->sptr
		597	);
		598	#endif
		599
		600	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		601
		602	return cctx;
		603	}
		604
		605	static void
		606	cctx_free (coro_cctx *cctx)
		607	{
		608	if (!cctx)
		609	return;
		610
		611	--cctx_count;
		612
		613	#if USE_VALGRIND
		614	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		615	#endif
		616
		617	#if HAVE_MMAP
		618	munmap (cctx->sptr, cctx->ssize);
		619	#else
		620	Safefree (cctx->sptr);
		621	#endif
		622
		623	Safefree (cctx);
		624	}
		625
		626	static coro_cctx *
		627	cctx_get ()
		628	{
		629	coro_cctx *cctx;
		630
		631	if (cctx_first)
		632	{
		633	--cctx_idle;
		634	cctx = cctx_first;
		635	cctx_first = cctx->next;
		636	}
		637	else
		638	{
		639	cctx = cctx_new ();
		640	PL_op = PL_op->op_next;
		641	}
		642
		643	return cctx;
		644	}
		645
		646	static void
		647	cctx_put (coro_cctx *cctx)
		648	{
		649	++cctx_idle;
		650	cctx->next = cctx_first;
		651	cctx_first = cctx;
		652	}
		653
		654	/* never call directly, always through the coro_state_transfer global variable */
		655	static void NOINLINE
671	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	656	transfer (struct coro *prev, struct coro *next, int flags)
672	{	657	{
673	dSTACKLEVEL;	658	dSTACKLEVEL;
674	static struct coro *xnext;
675		659
		660	/* sometimes transfer is only called to set idle_sp */
		661	if (flags == TRANSFER_SET_STACKLEVEL)
		662	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
676	if (prev != next)	663	else if (prev != next)
677	{	664	{
678	xnext = next;	665	coro_cctx *prev__cctx;
		666
		667	LOCK;
679		668
680	if (next->mainstack)	669	if (next->mainstack)
681	{	670	{
		671	/* coroutine already started */
682	SAVE (prev, flags);	672	SAVE (prev, flags);
683	LOAD (next);	673	LOAD (next);
684
685	/* mark this state as in-use */
686	next->mainstack = 0;
687	next->tmps_ix = -2;
688
689	/* stacklevel changed? if yes, grab the stack for us! */
690	if (flags & TRANSFER_SAVE_CCTXT)
691	{
692	if (!prev->stack)
693	allocate_stack (prev, 0);
694	else if (prev->cursp != stacklevel
695	&& prev->stack->usecnt > 1)
696	{
697	prev->gencnt = ++prev->stack->gencnt;
698	prev->stack->usecnt = 1;
699	}
700
701	/* has our stack been invalidated? */
702	if (next->stack && next->stack->gencnt != next->gencnt)
703	{
704	deallocate_stack (next);
705	allocate_stack (next, 1);
706	coro_create (&(next->stack->cctx),
707	continue_coro, (void *)next,
708	next->stack->sptr, labs (next->stack->ssize));
709	}
710
711	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712	/* don't add any code here */
713	}
714
715	}	674	}
716	else if (next->tmps_ix == -2)
717	croak ("tried to transfer to running coroutine");
718	else	675	else
719	{	676	{
		677	/* need to start coroutine */
720	SAVE (prev, -1); /* first get rid of the old state */	678	/* first get rid of the old state */
721		679	SAVE (prev, -1);
722	if (flags & TRANSFER_SAVE_CCTXT)	680	/* setup coroutine call */
723	{
724	if (!prev->stack)
725	allocate_stack (prev, 0);
726
727	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
728	{
729	setup_coro (next);
730
731	prev->stack->refcnt++;
732	prev->stack->usecnt++;
733	next->stack = prev->stack;
734	next->gencnt = prev->gencnt;
735	}
736	else
737	{
738	allocate_stack (next, 1);
739	coro_create (&(next->stack->cctx),
740	setup_coro, (void *)next,
741	next->stack->sptr, labs (next->stack->ssize));
742	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743	/* don't add any code here */
744	}
745	}
746	else
747	setup_coro (next);	681	setup_coro (next);
		682	/* need a stack */
		683	next->cctx = 0;
748	}	684	}
749		685
750	/*	686	if (!prev->cctx)
751	* xnext is now either prev or next, depending on wether	687	/* create a new empty context */
752	* we switched the c stack or not. that's why i use a global	688	Newz (0, prev->cctx, 1, coro_cctx);
753	* variable, that should become thread-specific at one point.	689
		690	prev__cctx = prev->cctx;
		691
		692	/* possibly "free" the cctx */
		693	if (prev__cctx->idle_sp == STACKLEVEL)
754	*/	694	{
755	xnext->cursp = stacklevel;	695	cctx_put (prev__cctx);
		696	prev->cctx = 0;
		697	}
		698
		699	if (!next->cctx)
		700	next->cctx = cctx_get ();
		701
		702	if (prev__cctx != next->cctx)
		703	{
		704	prev__cctx->top_env = PL_top_env;
		705	PL_top_env = next->cctx->top_env;
		706	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		707	}
		708
		709	free_coro_mortal ();
		710
		711	UNLOCK;
756	}	712	}
757	}	713	}
758		714
		715	struct transfer_args
		716	{
		717	struct coro *prev, *next;
		718	int flags;
		719	};
		720
		721	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		722
		723	static void
		724	coro_state_destroy (struct coro *coro)
		725	{
		726	if (coro->refcnt--)
		727	return;
		728
		729	if (coro->mainstack && coro->mainstack != main_mainstack)
		730	{
		731	struct coro temp;
		732
		733	SAVE ((&temp), TRANSFER_SAVE_ALL);
		734	LOAD (coro);
		735
		736	coro_destroy_stacks ();
		737
		738	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		739
		740	coro->mainstack = 0;
		741	}
		742
		743	cctx_free (coro->cctx);
		744	SvREFCNT_dec (coro->args);
		745	Safefree (coro);
		746	}
		747
		748	static int
		749	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		750	{
		751	struct coro *coro = (struct coro *)mg->mg_ptr;
		752	mg->mg_ptr = 0;
		753
		754	coro_state_destroy (coro);
		755
		756	return 0;
		757	}
		758
		759	static int
		760	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		761	{
		762	struct coro *coro = (struct coro *)mg->mg_ptr;
		763
		764	++coro->refcnt;
		765
		766	return 0;
		767	}
		768
		769	static MGVTBL coro_state_vtbl = {
		770	0, 0, 0, 0,
		771	coro_state_clear,
		772	0,
		773	#ifdef MGf_DUP
		774	coro_state_dup,
		775	#else
		776	# define MGf_DUP 0
		777	#endif
		778	};
		779
759	static struct coro *	780	static struct coro *
760	sv_to_coro (SV *arg, const char *funcname, const char *varname)	781	SvSTATE (SV *coro)
761	{	782	{
762	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	783	HV *stash;
		784	MAGIC *mg;
		785
		786	if (SvROK (coro))
		787	coro = SvRV (coro);
		788
		789	stash = SvSTASH (coro);
		790	if (stash != coro_stash && stash != coro_state_stash)
763	{	791	{
764	HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);	792	/* very slow, but rare, check */
765		793	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
766	if (!he)	794	croak ("Coro::State object required");
767	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
768
769	arg = HeVAL(he);
770	}	795	}
771
772	/* must also be changed inside Coro::Cont::yield */
773	if (SvROK(arg) && SvOBJECT(SvRV(arg))
774	&& SvSTASH(SvRV(arg)) == coro_state_stash)
775	return (struct coro *) SvIV((SV*)SvRV(arg));
776		796
777	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	797	mg = SvMAGIC (coro);
778	/*NORETURN*/	798	assert (mg->mg_type == PERL_MAGIC_ext);
		799	return (struct coro *)mg->mg_ptr;
779	}	800	}
780		801
781	static void	802	static void
		803	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		804	{
		805	ta->prev = SvSTATE (prev);
		806	ta->next = SvSTATE (next);
		807	ta->flags = flags;
		808	}
		809
		810	static void
782	api_transfer(pTHX_ SV *prev, SV *next, int flags)	811	api_transfer (SV *prev, SV *next, int flags)
783	{	812	{
784	transfer(aTHX_	813	dTHX;
785	sv_to_coro (prev, "Coro::transfer", "prev"),	814	struct transfer_args ta;
786	sv_to_coro (next, "Coro::transfer", "next"),	815
787	flags);	816	prepare_transfer (&ta, prev, next, flags);
		817	TRANSFER (ta);
788	}	818	}
789		819
790	/** Coro ********************************************************************/	820	/** Coro ********************************************************************/
791		821
792	#define PRIO_MAX 3	822	#define PRIO_MAX 3
…		…
796	#define PRIO_IDLE -3	826	#define PRIO_IDLE -3
797	#define PRIO_MIN -4	827	#define PRIO_MIN -4
798		828
799	/* for Coro.pm */	829	/* for Coro.pm */
800	static GV *coro_current, *coro_idle;	830	static GV *coro_current, *coro_idle;
801	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	831	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
802	static int coro_nready;	832	static int coro_nready;
803		833
804	static void	834	static void
805	coro_enq (SV *sv)	835	coro_enq (SV *sv)
806	{	836	{
807	if (SvROK (sv))	837	int prio;
808	{	838
809	SV *hv = SvRV (sv);
810	if (SvTYPE (hv) == SVt_PVHV)	839	if (SvTYPE (sv) != SVt_PVHV)
811	{
812	SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0);
813	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
814
815	prio = prio > PRIO_MAX ? PRIO_MAX
816	: prio < PRIO_MIN ? PRIO_MIN
817	: prio;
818
819	av_push (coro_ready [prio - PRIO_MIN], sv);
820	coro_nready++;
821
822	return;
823	}
824	}
825
826	croak ("Coro::ready tried to enqueue something that is not a coroutine");	840	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		841
		842	prio = SvSTATE (sv)->prio;
		843
		844	av_push (coro_ready [prio - PRIO_MIN], sv);
		845	coro_nready++;
827	}	846	}
828		847
829	static SV *	848	static SV *
830	coro_deq (int min_prio)	849	coro_deq (int min_prio)
831	{	850	{
…		…
834	min_prio -= PRIO_MIN;	853	min_prio -= PRIO_MIN;
835	if (min_prio < 0)	854	if (min_prio < 0)
836	min_prio = 0;	855	min_prio = 0;
837		856
838	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	857	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
839	if (av_len (coro_ready[prio]) >= 0)	858	if (AvFILLp (coro_ready [prio]) >= 0)
840	{	859	{
841	coro_nready--;	860	coro_nready--;
842	return av_shift (coro_ready[prio]);	861	return av_shift (coro_ready [prio]);
843	}	862	}
844		863
845	return 0;	864	return 0;
846	}	865	}
847		866
848	static void	867	static void
849	api_ready (SV *coro)	868	api_ready (SV *coro)
850	{	869	{
		870	dTHX;
		871
		872	if (SvROK (coro))
		873	coro = SvRV (coro);
		874
		875	LOCK;
851	coro_enq (SvREFCNT_inc (coro));	876	coro_enq (SvREFCNT_inc (coro));
		877	UNLOCK;
852	}	878	}
853		879
854	static void	880	static void
855	api_schedule (int cede)	881	prepare_schedule (struct transfer_args *ta)
856	{	882	{
857	SV *prev, *next;	883	SV *current, *prev, *next;
858		884
859	prev = GvSV (coro_current);	885	current = GvSV (coro_current);
860		886
861	if (cede)	887	for (;;)
862	coro_enq (SvREFCNT_inc (prev));	888	{
863		889	LOCK;
864	next = coro_deq (PRIO_MIN);	890	next = coro_deq (PRIO_MIN);
		891	UNLOCK;
865		892
866	if (!next)	893	if (next)
867	next = SvREFCNT_inc (GvSV (coro_idle));	894	break;
868		895
869	GvSV (coro_current) = SvREFCNT_inc (next);	896	{
870	transfer (aTHX_	897	dSP;
871	sv_to_coro (prev, "Coro::schedule", "current coroutine"),	898
872	sv_to_coro (next, "Coro::schedule", "next coroutine"),	899	ENTER;
873	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);	900	SAVETMPS;
874	SvREFCNT_dec (next);	901
875	SvREFCNT_dec (prev);	902	PUSHMARK (SP);
		903	PUTBACK;
		904	call_sv (GvSV (coro_idle), G_DISCARD);
		905
		906	FREETMPS;
		907	LEAVE;
		908	}
		909	}
		910
		911	prev = SvRV (current);
		912	SvRV (current) = next;
		913
		914	/* free this only after the transfer */
		915	LOCK;
		916	free_coro_mortal ();
		917	UNLOCK;
		918	coro_mortal = prev;
		919
		920	ta->prev = SvSTATE (prev);
		921	ta->next = SvSTATE (next);
		922	ta->flags = TRANSFER_SAVE_ALL;
		923	}
		924
		925	static void
		926	prepare_cede (struct transfer_args *ta)
		927	{
		928	LOCK;
		929	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		930	UNLOCK;
		931
		932	prepare_schedule (ta);
		933	}
		934
		935	static void
		936	api_schedule (void)
		937	{
		938	dTHX;
		939	struct transfer_args ta;
		940
		941	prepare_schedule (&ta);
		942	TRANSFER (ta);
		943	}
		944
		945	static void
		946	api_cede (void)
		947	{
		948	dTHX;
		949	struct transfer_args ta;
		950
		951	prepare_cede (&ta);
		952	TRANSFER (ta);
876	}	953	}
877		954
878	MODULE = Coro::State PACKAGE = Coro::State	955	MODULE = Coro::State PACKAGE = Coro::State
879		956
880	PROTOTYPES: ENABLE	957	PROTOTYPES: DISABLE
881		958
882	BOOT:	959	BOOT:
883	{ /* {} necessary for stoopid perl-5.6.x */	960	{
884	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	961	#ifdef USE_ITHREADS
885	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	962	MUTEX_INIT (&coro_mutex);
		963	#endif
		964	BOOT_PAGESIZE;
		965
886	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	966	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887		967
888	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	968	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
889	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	969	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
890	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	970	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
891	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
892
893	if (!padlist_cache)
894	padlist_cache = newHV ();
895		971
896	main_mainstack = PL_mainstack;	972	main_mainstack = PL_mainstack;
897		973
898	coroapi.ver = CORO_API_VERSION;	974	coroapi.ver = CORO_API_VERSION;
899	coroapi.transfer = api_transfer;	975	coroapi.transfer = api_transfer;
900	}
901		976
902	Coro::State	977	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
903	_newprocess(args)	978	}
904	SV * args	979
905	PROTOTYPE: $	980	SV *
		981	new (char *klass, ...)
906	CODE:	982	CODE:
907	Coro__State coro;	983	{
		984	struct coro *coro;
		985	HV *hv;
		986	int i;
908		987
909	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
910	croak ("Coro::State::_newprocess expects an arrayref");
911
912	New (0, coro, 1, struct coro);	988	Newz (0, coro, 1, struct coro);
		989	coro->args = newAV ();
913		990
914	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	991	hv = newHV ();
915	coro->mainstack = 0; /* actual work is done inside transfer */	992	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
916	coro->stack = 0;	993	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
917		994
918	RETVAL = coro;	995	for (i = 1; i < items; i++)
		996	av_push (coro->args, newSVsv (ST (i)));
		997	}
919	OUTPUT:	998	OUTPUT:
920	RETVAL	999	RETVAL
921		1000
922	void	1001	void
923	transfer(prev, next, flags)	1002	_set_stacklevel (...)
924	Coro::State_or_hashref prev	1003	ALIAS:
925	Coro::State_or_hashref next	1004	Coro::State::transfer = 1
926	int flags	1005	Coro::schedule = 2
927	PROTOTYPE: @	1006	Coro::cede = 3
		1007	Coro::Cont::yield = 4
928	CODE:	1008	CODE:
929	PUTBACK;	1009	{
930	transfer (aTHX_ prev, next, flags);	1010	struct transfer_args ta;
931	SPAGAIN;	1011
		1012	switch (ix)
		1013	{
		1014	case 0:
		1015	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1016	ta.next = 0;
		1017	ta.flags = TRANSFER_SET_STACKLEVEL;
		1018	break;
		1019
		1020	case 1:
		1021	if (items != 3)
		1022	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1023
		1024	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1025	break;
		1026
		1027	case 2:
		1028	prepare_schedule (&ta);
		1029	break;
		1030
		1031	case 3:
		1032	prepare_cede (&ta);
		1033	break;
		1034
		1035	case 4:
		1036	{
		1037	SV *yieldstack;
		1038	SV *sv;
		1039	AV *defav = GvAV (PL_defgv);
		1040
		1041	yieldstack = *hv_fetch (
		1042	(HV *)SvRV (GvSV (coro_current)),
		1043	"yieldstack", sizeof ("yieldstack") - 1,
		1044	0
		1045	);
		1046
		1047	/* set up @_ -- ugly */
		1048	av_clear (defav);
		1049	av_fill (defav, items - 1);
		1050	while (items--)
		1051	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1052
		1053	sv = av_pop ((AV *)SvRV (yieldstack));
		1054	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1055	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1056	ta.flags = 0;
		1057	SvREFCNT_dec (sv);
		1058	}
		1059	break;
		1060
		1061	}
		1062
		1063	TRANSFER (ta);
		1064	}
932		1065
933	void	1066	void
934	DESTROY(coro)	1067	_clone_state_from (SV *dst, SV *src)
935	Coro::State coro	1068	CODE:
936	CODE:	1069	{
		1070	struct coro *coro_src = SvSTATE (src);
937		1071
938	if (coro->mainstack && coro->mainstack != main_mainstack)	1072	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
939	{
940	struct coro temp;
941		1073
942	PUTBACK;	1074	++coro_src->refcnt;
943	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1075	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
944	LOAD(aTHX_ coro);	1076	}
945	SPAGAIN;
946
947	destroy_stacks (aTHX);
948
949	LOAD((&temp)); /* this will get rid of defsv etc.. */
950	SPAGAIN;
951
952	coro->mainstack = 0;
953	}
954
955	deallocate_stack (coro);
956
957	Safefree (coro);
958		1077
959	void	1078	void
960	flush()
961	CODE:
962	#ifdef MAY_FLUSH
963	flush_padlist_cache ();
964	#endif
965
966	void
967	_exit(code)	1079	_exit (code)
968	int code	1080	int code
969	PROTOTYPE: $	1081	PROTOTYPE: $
970	CODE:	1082	CODE:
971	#if defined(__GLIBC__) || _POSIX_C_SOURCE
972	_exit (code);	1083	_exit (code);
973	#else
974	signal (SIGTERM, SIG_DFL);
975	raise (SIGTERM);
976	exit (code);
977	#endif
978		1084
979	MODULE = Coro::State PACKAGE = Coro::Cont	1085	int
		1086	cctx_count ()
		1087	CODE:
		1088	RETVAL = cctx_count;
		1089	OUTPUT:
		1090	RETVAL
980		1091
981	# this is slightly dirty (should expose a c-level api)	1092	int
982		1093	cctx_idle ()
983	void	1094	CODE:
984	yield(...)	1095	RETVAL = cctx_idle;
985	PROTOTYPE: @	1096	OUTPUT:
986	CODE:	1097	RETVAL
987	static SV *returnstk;
988	SV *sv;
989	AV *defav = GvAV (PL_defgv);
990	struct coro *prev, *next;
991
992	if (!returnstk)
993	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
994
995	/* set up @_ -- ugly */
996	av_clear (defav);
997	av_fill (defav, items - 1);
998	while (items--)
999	av_store (defav, items, SvREFCNT_inc (ST(items)));
1000
1001	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1002	sv = av_pop ((AV *)SvRV (returnstk));
1003	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1004	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1005	SvREFCNT_dec (sv);
1006
1007	transfer(aTHX_ prev, next, 0);
1008		1098
1009	MODULE = Coro::State PACKAGE = Coro	1099	MODULE = Coro::State PACKAGE = Coro
1010		1100
1011	# this is slightly dirty (should expose a c-level api)
1012
1013	BOOT:	1101	BOOT:
1014	{	1102	{
1015	int i;	1103	int i;
		1104
1016	HV *stash = gv_stashpv ("Coro", TRUE);	1105	coro_stash = gv_stashpv ("Coro", TRUE);
1017		1106
1018	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1107	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1108	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1109	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1110	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1111	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1112	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1024		1113
1025	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1114	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1026	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1115	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1027		1116
1028	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1117	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1030		1119
1031	{	1120	{
1032	SV *sv = perl_get_sv("Coro::API", 1);	1121	SV *sv = perl_get_sv("Coro::API", 1);
1033		1122
1034	coroapi.schedule = api_schedule;	1123	coroapi.schedule = api_schedule;
		1124	coroapi.cede = api_cede;
1035	coroapi.ready = api_ready;	1125	coroapi.ready = api_ready;
1036	coroapi.nready = &coro_nready;	1126	coroapi.nready = &coro_nready;
1037	coroapi.current = coro_current;	1127	coroapi.current = coro_current;
1038		1128
1039	GCoroAPI = &coroapi;	1129	GCoroAPI = &coroapi;
1040	sv_setiv(sv, (IV)&coroapi);	1130	sv_setiv (sv, (IV)&coroapi);
1041	SvREADONLY_on(sv);	1131	SvREADONLY_on (sv);
1042	}	1132	}
1043	}	1133	}
1044		1134
		1135	int
		1136	prio (Coro::State coro, int newprio = 0)
		1137	ALIAS:
		1138	nice = 1
		1139	CODE:
		1140	{
		1141	RETVAL = coro->prio;
		1142
		1143	if (items > 1)
		1144	{
		1145	if (ix)
		1146	newprio += coro->prio;
		1147
		1148	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1149	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1150
		1151	coro->prio = newprio;
		1152	}
		1153	}
		1154
1045	void	1155	void
1046	ready(self)	1156	ready (SV *self)
1047	SV * self
1048	PROTOTYPE: $	1157	PROTOTYPE: $
1049	CODE:	1158	CODE:
1050	api_ready (self);	1159	api_ready (self);
1051		1160
1052	int	1161	int
1053	nready(...)	1162	nready (...)
1054	PROTOTYPE:	1163	PROTOTYPE:
1055	CODE:	1164	CODE:
1056	RETVAL = coro_nready;	1165	RETVAL = coro_nready;
1057	OUTPUT:	1166	OUTPUT:
1058	RETVAL	1167	RETVAL
1059		1168
		1169	MODULE = Coro::State PACKAGE = Coro::AIO
		1170
		1171	SV *
		1172	_get_state ()
		1173	CODE:
		1174	{
		1175	struct {
		1176	int errorno;
		1177	int laststype;
		1178	int laststatval;
		1179	Stat_t statcache;
		1180	} data;
		1181
		1182	data.errorno = errno;
		1183	data.laststype = PL_laststype;
		1184	data.laststatval = PL_laststatval;
		1185	data.statcache = PL_statcache;
		1186
		1187	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1188	}
		1189	OUTPUT:
		1190	RETVAL
		1191
1060	void	1192	void
1061	schedule(...)	1193	_set_state (char *data_)
1062	PROTOTYPE:	1194	PROTOTYPE: $
1063	ALIAS:
1064	cede = 1
1065	CODE:	1195	CODE:
1066	api_schedule (ix);	1196	{
		1197	struct {
		1198	int errorno;
		1199	int laststype;
		1200	int laststatval;
		1201	Stat_t statcache;
		1202	} *data = (void *)data_;
1067		1203
		1204	errno = data->errorno;
		1205	PL_laststype = data->laststype;
		1206	PL_laststatval = data->laststatval;
		1207	PL_statcache = data->statcache;
		1208	}

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