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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.44 by root, Sat Mar 22 18:50:32 2003 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_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
…		…
14	# define MAP_ANONYMOUS 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	AV *comppad;
74	SV **stack_base;
75	SV **stack_max;
76	SV **tmps_stack;
77	I32 tmps_floor;
78	I32 tmps_ix;
79	I32 tmps_max;
80	I32 *markstack;
81	I32 *markstack_ptr;
82	I32 *markstack_max;
83	I32 *scopestack;
84	I32 scopestack_ix;
85	I32 scopestack_max;
86	ANY *savestack;
87	I32 savestack_ix;
88	I32 savestack_max;
89	OP **retstack;
90	I32 retstack_ix;
91	I32 retstack_max;
92	COP *curcop;
93	JMPENV *top_env;
94
95	/* data associated with this coroutine (initial args) */
96	AV *args;
97	};	149	};
98		150
99	typedef struct coro *Coro__State;	151	typedef struct coro *Coro__State;
100	typedef struct coro *Coro__State_or_hashref;	152	typedef struct coro *Coro__State_or_hashref;
101		153
102	static AV *main_mainstack; /* used to differentiate between $main and others */	154	static AV *
103	static HV *coro_state_stash;	155	coro_clone_padlist (CV *cv)
104	static SV *ucoro_state_sv;
105	static U32 ucoro_state_hash;
106	static HV *padlist_cache;
107	static SV *coro_mortal; /* will be freed after next transfer */
108
109	/* mostly copied from op.c:cv_clone2 */
110	STATIC AV *
111	clone_padlist (AV *protopadlist)
112	{	156	{
113	AV *av;	157	AV *padlist = CvPADLIST (cv);
114	I32 ix;
115	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
116	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
117	SV **pname = AvARRAY (protopad_name);
118	SV **ppad = AvARRAY (protopad);
119	I32 fname = AvFILLp (protopad_name);
120	I32 fpad = AvFILLp (protopad);
121	AV *newpadlist, *newpad_name, *newpad;	158	AV *newpadlist, *newpad;
122	SV **npad;
123
124	newpad_name = newAV ();
125	for (ix = fname; ix >= 0; ix--)
126	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
127
128	newpad = newAV ();
129	av_fill (newpad, AvFILLp (protopad));
130	npad = AvARRAY (newpad);
131		159
132	newpadlist = newAV ();	160	newpadlist = newAV ();
133	AvREAL_off (newpadlist);	161	AvREAL_off (newpadlist);
134	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)));
135	av_store (newpadlist, 1, (SV *) newpad);	171	av_store (newpadlist, 1, (SV *)newpad);
136		172
137	av = newAV (); /* will be @_ */	173	return newpadlist;
138	av_extend (av, 0);	174	}
139	av_store (newpad, 0, (SV *) av);
140	AvFLAGS (av) = AVf_REIFY;
141		175
142	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))
143	{	181	{
144	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	182	I32 i = AvFILLp (padlist);
145	if (namesv && namesv != &PL_sv_undef)	183	while (i >= 0)
146	{	184	{
147	char *name = SvPVX (namesv); /* XXX */	185	SV **svp = av_fetch (padlist, i--, FALSE);
148	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	186	if (svp)
149	{ /* lexical from outside? */
150	npad[ix] = SvREFCNT_inc (ppad[ix]);
151	}	187	{
152	else
153	{ /* our own lexical */
154	SV *sv;	188	SV *sv;
155	if (*name == '&')	189	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
156	sv = SvREFCNT_inc (ppad[ix]);	190	SvREFCNT_dec (sv);
157	else if (*name == '@')	191
158	sv = (SV *) newAV ();	192	SvREFCNT_dec (*svp);
159	else if (*name == '%')
160	sv = (SV *) newHV ();
161	else
162	sv = NEWSV (0, 0);
163	if (!SvPADBUSY (sv))
164	SvPADMY_on (sv);
165	npad[ix] = sv;
166	}	193	}
167	}	194	}
168	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	195
169	{	196	SvREFCNT_dec ((SV*)padlist);
170	npad[ix] = SvREFCNT_inc (ppad[ix]);
171	}
172	else
173	{
174	SV *sv = NEWSV (0, 0);
175	SvPADTMP_on (sv);
176	npad[ix] = sv;
177	}
178	}	197	}
		198	}
179		199
180	#if 0 /* return -ENOTUNDERSTOOD */	200	static int
181	/* 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;
182		205
183	for (ix = fpad; ix > 0; ix--) {	206	/* casting is fun. */
184	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	207	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
185	if (namesv	208	free_padlist (padlist);
186	&& namesv != &PL_sv_undef	209
187	&& !(SvFLAGS(namesv) & SVf_FAKE)	210	SvREFCNT_dec (av);
188	&& *SvPVX(namesv) == '&'	211
189	&& CvCLONE(ppad[ix]))	212	return 0;
190	{	213	}
191	CV *kid = cv_clone((CV*)ppad[ix]);	214
192	SvREFCNT_dec(ppad[ix]);	215	#define PERL_MAGIC_coro PERL_MAGIC_ext
193	CvCLONE_on(kid);	216
194	SvPADMY_on(kid);	217	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
195	npad[ix] = (SV*)kid;	218
196	}	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 ();
197	}	261	}
198	#endif
199		262
200	return newpadlist;	263	av = (AV *)mg->mg_obj;
201	}
202		264
203	#ifdef MAY_FLUSH	265	if (AvFILLp (av) >= AvMAX (av))
204	STATIC void	266	av_extend (av, AvMAX (av) + 1);
205	free_padlist (AV *padlist)
206	{
207	/* may be during global destruction */
208	if (SvREFCNT(padlist))
209	{
210	I32 i = AvFILLp(padlist);
211	while (i >= 0)
212	{
213	SV **svp = av_fetch(padlist, i--, FALSE);
214	SV *sv = svp ? *svp : Nullsv;
215	if (sv)
216	SvREFCNT_dec(sv);
217	}
218		267
219	SvREFCNT_dec((SV*)padlist);	268	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
220	}
221	}	269	}
222	#endif
223
224	/* the next two functions merely cache the padlists */
225	STATIC void
226	get_padlist (CV *cv)
227	{
228	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
229
230	if (he && AvFILLp ((AV *)*he) >= 0)
231	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
232	else
233	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
234	}
235
236	STATIC void
237	put_padlist (CV *cv)
238	{
239	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
240
241	if (SvTYPE (*he) != SVt_PVAV)
242	{
243	SvREFCNT_dec (*he);
244	*he = (SV *)newAV ();
245	}
246
247	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
248	}
249
250	#ifdef MAY_FLUSH
251	STATIC void
252	flush_padlist_cache ()
253	{
254	HV *hv = padlist_cache;
255	padlist_cache = newHV ();
256
257	if (hv_iterinit (hv))
258	{
259	HE *he;
260	AV *padlist;
261
262	while (!!(he = hv_iternext (hv)))
263	{
264	AV *av = (AV *)HeVAL(he);
265
266	/* casting is fun. */
267	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
268	free_padlist (padlist);
269	}
270	}
271
272	SvREFCNT_dec (hv);
273	}
274	#endif
275		270
276	#define SB do {	271	#define SB do {
277	#define SE } while (0)	272	#define SE } while (0)
278		273
279	#define LOAD(state) load_state(aTHX_ (state));	274	#define LOAD(state) load_state((state));
280	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	275	#define SAVE(state,flags) save_state((state),(flags));
281		276
282	#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
283		278
284	static void	279	static void
285	load_state(pTHX_ Coro__State c)	280	load_state(Coro__State c)
286	{	281	{
287	PL_dowarn = c->dowarn;	282	#define VAR(name,type) PL_ ## name = c->name;
288	PL_in_eval = c->in_eval;	283	# include "state.h"
289		284	#undef VAR
290	PL_curstackinfo = c->curstackinfo;
291	PL_curstack = c->curstack;
292	PL_mainstack = c->mainstack;
293	PL_stack_sp = c->stack_sp;
294	PL_op = c->op;
295	PL_curpad = c->curpad;
296	PL_comppad = c->comppad;
297	PL_stack_base = c->stack_base;
298	PL_stack_max = c->stack_max;
299	PL_tmps_stack = c->tmps_stack;
300	PL_tmps_floor = c->tmps_floor;
301	PL_tmps_ix = c->tmps_ix;
302	PL_tmps_max = c->tmps_max;
303	PL_markstack = c->markstack;
304	PL_markstack_ptr = c->markstack_ptr;
305	PL_markstack_max = c->markstack_max;
306	PL_scopestack = c->scopestack;
307	PL_scopestack_ix = c->scopestack_ix;
308	PL_scopestack_max = c->scopestack_max;
309	PL_savestack = c->savestack;
310	PL_savestack_ix = c->savestack_ix;
311	PL_savestack_max = c->savestack_max;
312	PL_retstack = c->retstack;
313	PL_retstack_ix = c->retstack_ix;
314	PL_retstack_max = c->retstack_max;
315	PL_curcop = c->curcop;
316	PL_top_env = c->top_env;
317		285
318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	286	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	287	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	288	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
321		289
…		…
324	CV *cv;	292	CV *cv;
325		293
326	/* now do the ugly restore mess */	294	/* now do the ugly restore mess */
327	while ((cv = (CV *)POPs))	295	while ((cv = (CV *)POPs))
328	{	296	{
329	AV *padlist = (AV *)POPs;
330
331	if (padlist)
332	{
333	put_padlist (cv); /* mark this padlist as available */	297	put_padlist (cv); /* mark this padlist as available */
334	CvPADLIST(cv) = padlist;	298	CvDEPTH (cv) = PTR2IV (POPs);
335	#ifdef USE_THREADS	299	CvPADLIST (cv) = (AV *)POPs;
336	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
337	#endif
338	}
339
340	++CvDEPTH(cv);
341	}	300	}
342		301
343	PUTBACK;	302	PUTBACK;
344	}	303	}
345	}	304	}
346		305
347	static void	306	static void
348	save_state(pTHX_ Coro__State c, int flags)	307	save_state(Coro__State c, int flags)
349	{	308	{
350	{	309	{
351	dSP;	310	dSP;
352	I32 cxix = cxstack_ix;	311	I32 cxix = cxstack_ix;
353	PERL_CONTEXT *ccstk = cxstack;	312	PERL_CONTEXT *ccstk = cxstack;
…		…
367	PERL_CONTEXT *cx = &ccstk[cxix--];	326	PERL_CONTEXT *cx = &ccstk[cxix--];
368		327
369	if (CxTYPE(cx) == CXt_SUB)	328	if (CxTYPE(cx) == CXt_SUB)
370	{	329	{
371	CV *cv = cx->blk_sub.cv;	330	CV *cv = cx->blk_sub.cv;
		331
372	if (CvDEPTH(cv))	332	if (CvDEPTH (cv))
373	{	333	{
374	#ifdef USE_THREADS
375	/*XPUSHs ((SV *)CvOWNER(cv));*/
376	/*CvOWNER(cv) = 0;*/
377	/*error must unlock this cv etc.. etc...*/
378	#endif
379	EXTEND (SP, CvDEPTH(cv)*2);	334	EXTEND (SP, 3);
380
381	while (--CvDEPTH(cv))
382	{
383	/* this tells the restore code to increment CvDEPTH */
384	PUSHs (Nullsv);
385	PUSHs ((SV *)cv);
386	}
387		335
388	PUSHs ((SV *)CvPADLIST(cv));	336	PUSHs ((SV *)CvPADLIST(cv));
		337	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
389	PUSHs ((SV *)cv);	338	PUSHs ((SV *)cv);
390		339
		340	CvDEPTH (cv) = 0;
391	get_padlist (cv); /* this is a monster */	341	get_padlist (cv);
392	}	342	}
393	}	343	}
		344	#ifdef CXt_FORMAT
394	else if (CxTYPE(cx) == CXt_FORMAT)	345	else if (CxTYPE(cx) == CXt_FORMAT)
395	{	346	{
396	/* 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? */
397	/* my bold guess is as a simple, plain sub... */	348	/* my bold guess is as a simple, plain sub... */
398	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");
399	}	350	}
		351	#endif
400	}	352	}
401		353
402	if (top_si->si_type == PERLSI_MAIN)	354	if (top_si->si_type == PERLSI_MAIN)
403	break;	355	break;
404		356
…		…
412		364
413	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;
414	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	366	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
415	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	367	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
416		368
417	c->dowarn = PL_dowarn;	369	#define VAR(name,type)c->name = PL_ ## name;
418	c->in_eval = PL_in_eval;	370	# include "state.h"
419		371	#undef VAR
420	c->curstackinfo = PL_curstackinfo;
421	c->curstack = PL_curstack;
422	c->mainstack = PL_mainstack;
423	c->stack_sp = PL_stack_sp;
424	c->op = PL_op;
425	c->curpad = PL_curpad;
426	c->comppad = PL_comppad;
427	c->stack_base = PL_stack_base;
428	c->stack_max = PL_stack_max;
429	c->tmps_stack = PL_tmps_stack;
430	c->tmps_floor = PL_tmps_floor;
431	c->tmps_ix = PL_tmps_ix;
432	c->tmps_max = PL_tmps_max;
433	c->markstack = PL_markstack;
434	c->markstack_ptr = PL_markstack_ptr;
435	c->markstack_max = PL_markstack_max;
436	c->scopestack = PL_scopestack;
437	c->scopestack_ix = PL_scopestack_ix;
438	c->scopestack_max = PL_scopestack_max;
439	c->savestack = PL_savestack;
440	c->savestack_ix = PL_savestack_ix;
441	c->savestack_max = PL_savestack_max;
442	c->retstack = PL_retstack;
443	c->retstack_ix = PL_retstack_ix;
444	c->retstack_max = PL_retstack_max;
445	c->curcop = PL_curcop;
446	c->top_env = PL_top_env;
447	}	372	}
448		373
449	/*	374	/*
450	* allocate various perl stacks. This is an exact copy	375	* allocate various perl stacks. This is an exact copy
451	* of perl.c:init_stacks, except that it uses less memory	376	* of perl.c:init_stacks, except that it uses less memory
452	* on the assumption that coroutines do not usually need	377	* on the (sometimes correct) assumption that coroutines do
453	* a lot of stackspace.	378	* not usually need a lot of stackspace.
454	*/	379	*/
455	STATIC void	380	static void
456	coro_init_stacks (pTHX)	381	coro_init_stacks ()
457	{	382	{
458	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	383	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
459	PL_curstackinfo->si_type = PERLSI_MAIN;	384	PL_curstackinfo->si_type = PERLSI_MAIN;
460	PL_curstack = PL_curstackinfo->si_stack;	385	PL_curstack = PL_curstackinfo->si_stack;
461	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	386	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
471		396
472	New(54,PL_markstack,16,I32);	397	New(54,PL_markstack,16,I32);
473	PL_markstack_ptr = PL_markstack;	398	PL_markstack_ptr = PL_markstack;
474	PL_markstack_max = PL_markstack + 16;	399	PL_markstack_max = PL_markstack + 16;
475		400
		401	#ifdef SET_MARK_OFFSET
476	SET_MARK_OFFSET;	402	SET_MARK_OFFSET;
		403	#endif
477		404
478	New(54,PL_scopestack,16,I32);	405	New(54,PL_scopestack,16,I32);
479	PL_scopestack_ix = 0;	406	PL_scopestack_ix = 0;
480	PL_scopestack_max = 16;	407	PL_scopestack_max = 16;
481		408
482	New(54,PL_savestack,96,ANY);	409	New(54,PL_savestack,96,ANY);
483	PL_savestack_ix = 0;	410	PL_savestack_ix = 0;
484	PL_savestack_max = 96;	411	PL_savestack_max = 96;
485		412
		413	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	414	New(54,PL_retstack,8,OP*);
487	PL_retstack_ix = 0;	415	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	416	PL_retstack_max = 8;
		417	#endif
489	}	418	}
490		419
491	/*	420	/*
492	* destroy the stacks, the callchain etc...	421	* destroy the stacks, the callchain etc...
493	* still there is a memleak of 128 bytes...
494	*/	422	*/
495	STATIC void	423	static void
496	destroy_stacks(pTHX)	424	coro_destroy_stacks ()
497	{	425	{
498	if (!IN_DESTRUCT)	426	if (!IN_DESTRUCT)
499	{	427	{
500	/* is this ugly, I ask? */	428	/* is this ugly, I ask? */
501	while (PL_scopestack_ix)	429	LEAVE_SCOPE (0);
502	LEAVE;
503		430
504	/* sure it is, but more important: is it correct?? :/ */	431	/* sure it is, but more important: is it correct?? :/ */
505	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
506	FREETMPS;	432	FREETMPS;
		433
		434	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
507	}	435	}
508		436
509	while (PL_curstackinfo->si_next)	437	while (PL_curstackinfo->si_next)
510	PL_curstackinfo = PL_curstackinfo->si_next;	438	PL_curstackinfo = PL_curstackinfo->si_next;
511		439
512	while (PL_curstackinfo)	440	while (PL_curstackinfo)
513	{	441	{
514	PERL_SI *p = PL_curstackinfo->si_prev;	442	PERL_SI *p = PL_curstackinfo->si_prev;
515		443
516	{	444	{ /*D*//*remove*/
517	dSP;	445	dSP;
518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	446	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519	PUTBACK; /* possibly superfluous */	447	PUTBACK; /* possibly superfluous */
520	}	448	}
521		449
522	if (!IN_DESTRUCT)	450	if (!IN_DESTRUCT)
523	{	451	{
524	dounwind(-1);	452	dounwind (-1);/*D*//*remove*/
525	SvREFCNT_dec(PL_curstackinfo->si_stack);	453	SvREFCNT_dec (PL_curstackinfo->si_stack);
526	}	454	}
527		455
528	Safefree(PL_curstackinfo->si_cxstack);	456	Safefree (PL_curstackinfo->si_cxstack);
529	Safefree(PL_curstackinfo);	457	Safefree (PL_curstackinfo);
530	PL_curstackinfo = p;	458	PL_curstackinfo = p;
531	}	459	}
532		460
533	Safefree(PL_tmps_stack);	461	Safefree (PL_tmps_stack);
534	Safefree(PL_markstack);	462	Safefree (PL_markstack);
535	Safefree(PL_scopestack);	463	Safefree (PL_scopestack);
536	Safefree(PL_savestack);	464	Safefree (PL_savestack);
		465	#if !PERL_VERSION_ATLEAST (5,9,0)
537	Safefree(PL_retstack);	466	Safefree (PL_retstack);
538	}
539
540	static void
541	allocate_stack (Coro__State ctx, int alloc)
542	{
543	coro_stack *stack;
544
545	New (0, stack, 1, coro_stack);
546
547	stack->refcnt = 1;
548	stack->usecnt = 1;
549	stack->gencnt = ctx->gencnt = 0;
550	if (alloc)
551	{
552	#if HAVE_MMAP
553	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
554	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
555	if (stack->sptr == (void *)-1)
556	#endif	467	#endif
557	{
558	/*FIXME*//*D*//* reasonable stack size! */
559	stack->ssize = -4096 * sizeof (long);
560	New (0, stack->sptr, 4096, long);
561	}
562	}
563	else
564	stack->sptr = 0;
565
566	ctx->stack = stack;
567	}	468	}
568		469
569	static void	470	static void
570	deallocate_stack (Coro__State ctx)	471	setup_coro (struct coro *coro)
571	{
572	coro_stack *stack = ctx->stack;
573
574	ctx->stack = 0;
575
576	if (stack)
577	{
578	if (!--stack->refcnt)
579	{
580	#ifdef HAVE_MMAP
581	if (stack->ssize > 0 && stack->sptr)
582	munmap (stack->sptr, stack->ssize);
583	else
584	#else
585	Safefree (stack->sptr);
586	#endif
587	Safefree (stack);
588	}
589	else if (ctx->gencnt == stack->gencnt)
590	--stack->usecnt;
591	}
592	}
593
594	static void
595	setup_coro (void *arg)
596	{	472	{
597	/*	473	/*
598	* emulate part of the perl startup here.	474	* emulate part of the perl startup here.
599	*/	475	*/
600	dSP;
601	Coro__State ctx = (Coro__State)arg;
602	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
603		476
604	coro_init_stacks (aTHX);	477	coro_init_stacks ();
		478
605	/*PL_curcop = 0;*/	479	PL_curcop = 0;
606	/*PL_in_eval = PL_in_eval;*/ /* inherit */	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
607	SvREFCNT_dec (GvAV (PL_defgv));	490	SvREFCNT_dec (GvAV (PL_defgv));
608	GvAV (PL_defgv) = ctx->args;	491	GvAV (PL_defgv) = coro->args; coro->args = 0;
609		492
610	SPAGAIN;
611
612	if (ctx->stack)
613	{
614	ctx->cursp = 0;
615
616	PUSHMARK(SP);
617	PUTBACK;
618	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
619
620	if (SvTRUE (ERRSV))
621	croak (NULL);
622	else
623	croak ("FATAL: CCTXT coroutine returned!");
624	}
625	else
626	{
627	UNOP myop;
628
629	PL_op = (OP *)&myop;
630
631	Zero(&myop, 1, UNOP);	493	Zero (&myop, 1, LOGOP);
632	myop.op_next = Nullop;	494	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;	495	myop.op_flags = OPf_WANT_VOID;
634		496
		497	PL_op = (OP *)&myop;
		498
635	PUSHMARK(SP);	499	PUSHMARK (SP);
636	XPUSHs (sub_init);	500	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
637	/*
638	* the next line is slightly wrong, as PL_op->op_next
639	* is actually being executed so we skip the first op.
640	* that doesn't matter, though, since it is only
641	* pp_nextstate and we never return...
642	* ah yes, and I don't care anyways ;)
643	*/
644	PUTBACK;	501	PUTBACK;
645	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	502	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
646	SPAGAIN;	503	SPAGAIN;
647		504
648	ENTER; /* necessary e.g. for dounwind */	505	ENTER; /* necessary e.g. for dounwind */
649	}	506	}
650	}	507	}
651		508
652	static void	509	static void
653	continue_coro (void *arg)	510	free_coro_mortal ()
654	{	511	{
655	/*
656	* this is a _very_ stripped down perl interpreter ;)
657	*/
658	Coro__State ctx = (Coro__State)arg;
659	JMPENV coro_start_env;
660
661	/* same as JMPENV_BOOTSTRAP */
662	Zero(&coro_start_env, 1, JMPENV);
663	coro_start_env.je_ret = -1;
664	coro_start_env.je_mustcatch = TRUE;
665	PL_top_env = &coro_start_env;
666
667	ctx->cursp = 0;
668	PL_op = PL_op->op_next;
669	CALLRUNOPS(aTHX);
670
671	abort ();
672	}
673
674	STATIC void
675	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
676	{
677	dSTACKLEVEL;
678	static struct coro *xnext;
679
680	if (prev != next)
681	{
682	xnext = next;
683
684	if (next->mainstack)
685	{
686	SAVE (prev, flags);
687	LOAD (next);
688
689	/* mark this state as in-use */
690	next->mainstack = 0;
691	next->tmps_ix = -2;
692
693	/* stacklevel changed? if yes, grab the stack for us! */
694	if (flags & TRANSFER_SAVE_CCTXT)
695	{
696	if (!prev->stack)
697	allocate_stack (prev, 0);
698	else if (prev->cursp != stacklevel
699	&& prev->stack->usecnt > 1)
700	{
701	prev->gencnt = ++prev->stack->gencnt;
702	prev->stack->usecnt = 1;
703	}
704
705	/* has our stack been invalidated? */
706	if (next->stack && next->stack->gencnt != next->gencnt)
707	{
708	deallocate_stack (next);
709	allocate_stack (next, 1);
710	coro_create (&(next->stack->cctx),
711	continue_coro, (void *)next,
712	next->stack->sptr, labs (next->stack->ssize));
713	}
714
715	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716	/* don't add any code here */
717	}
718
719	}
720	else if (next->tmps_ix == -2)
721	croak ("tried to transfer to running coroutine");
722	else
723	{
724	SAVE (prev, -1); /* first get rid of the old state */
725
726	if (flags & TRANSFER_SAVE_CCTXT)
727	{
728	if (!prev->stack)
729	allocate_stack (prev, 0);
730
731	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732	{
733	setup_coro (next);
734
735	prev->stack->refcnt++;
736	prev->stack->usecnt++;
737	next->stack = prev->stack;
738	next->gencnt = prev->gencnt;
739	}
740	else
741	{
742	allocate_stack (next, 1);
743	coro_create (&(next->stack->cctx),
744	setup_coro, (void *)next,
745	next->stack->sptr, labs (next->stack->ssize));
746	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
747	/* don't add any code here */
748	}
749	}
750	else
751	setup_coro (next);
752	}
753
754	/*
755	* xnext is now either prev or next, depending on wether
756	* we switched the c stack or not. that's why I use a global
757	* variable, that should become thread-specific at one point.
758	*/
759	xnext->cursp = stacklevel;
760	}
761
762	if (coro_mortal)	512	if (coro_mortal)
763	{	513	{
764	SvREFCNT_dec (coro_mortal);	514	SvREFCNT_dec (coro_mortal);
765	coro_mortal = 0;	515	coro_mortal = 0;
766	}	516	}
767	}	517	}
768		518
769	#define SV_CORO(sv,func) \	519	static void NOINLINE
770	do { \	520	prepare_cctx (coro_cctx *cctx)
771	if (SvROK (sv)) \	521	{
772	sv = SvRV (sv); \	522	dSP;
773	\	523	LOGOP myop;
774	if (SvTYPE(sv) == SVt_PVHV) \
775	{ \
776	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
777	\
778	if (!he) \
779	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
780	\
781	(sv) = SvRV (HeVAL(he)); \
782	} \
783	\
784	/* must also be changed inside Coro::Cont::yield */ \
785	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
786	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
787	\
788	} while(0)
789		524
790	#define SvSTATE(sv) (struct coro *)SvIV (sv)	525	Zero (&myop, 1, LOGOP);
		526	myop.op_next = PL_op;
		527	myop.op_flags = OPf_WANT_VOID;
791		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);
		535	SPAGAIN;
		536	}
		537
		538	static void
		539	coro_run (void *arg)
		540	{
		541	/* coro_run is the alternative epilogue of transfer() */
		542	UNLOCK;
		543
		544	/*
		545	* this is a _very_ stripped down perl interpreter ;)
		546	*/
		547	PL_top_env = &PL_start_env;
		548
		549	/* inject call to cctx_init */
		550	prepare_cctx ((coro_cctx *)arg);
		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);
		556	abort ();
		557	}
		558
		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
		660	transfer (struct coro *prev, struct coro *next, int flags)
		661	{
		662	dSTACKLEVEL;
		663
		664	/* sometimes transfer is only called to set idle_sp */
		665	if (flags == TRANSFER_SET_STACKLEVEL)
		666	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		667	else if (prev != next)
		668	{
		669	coro_cctx *prev__cctx;
		670
		671	LOCK;
		672
		673	if (next->mainstack)
		674	{
		675	/* coroutine already started */
		676	SAVE (prev, flags);
		677	LOAD (next);
		678	}
		679	else
		680	{
		681	/* need to start coroutine */
		682	/* first get rid of the old state */
		683	SAVE (prev, -1);
		684	/* setup coroutine call */
		685	setup_coro (next);
		686	/* need a stack */
		687	next->cctx = 0;
		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;
		717	}
		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
792	static void	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	};
		784
		785	static struct coro *
		786	SvSTATE (SV *coro)
		787	{
		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)
		796	{
		797	/* very slow, but rare, check */
		798	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		799	croak ("Coro::State object required");
		800	}
		801
		802	mg = SvMAGIC (coro);
		803	assert (mg->mg_type == PERL_MAGIC_ext);
		804	return (struct coro *)mg->mg_ptr;
		805	}
		806
		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
793	api_transfer(pTHX_ SV *prev, SV *next, int flags)	816	api_transfer (SV *prev, SV *next, int flags)
794	{	817	{
795	SV_CORO (prev, "Coro::transfer");	818	dTHX;
796	SV_CORO (next, "Coro::transfer");	819	struct transfer_args ta;
797		820
798	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	821	prepare_transfer (&ta, prev, next, flags);
		822	TRANSFER (ta);
799	}	823	}
800		824
801	/** Coro ********************************************************************/	825	/** Coro ********************************************************************/
802		826
803	#define PRIO_MAX 3	827	#define PRIO_MAX 3
…		…
807	#define PRIO_IDLE -3	831	#define PRIO_IDLE -3
808	#define PRIO_MIN -4	832	#define PRIO_MIN -4
809		833
810	/* for Coro.pm */	834	/* for Coro.pm */
811	static GV *coro_current, *coro_idle;	835	static GV *coro_current, *coro_idle;
812	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	836	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
813	static int coro_nready;	837	static int coro_nready;
814		838
815	static void	839	static void
816	coro_enq (SV *sv)	840	coro_enq (SV *sv)
817	{	841	{
		842	int prio;
		843
818	if (SvTYPE (sv) == SVt_PVHV)	844	if (SvTYPE (sv) != SVt_PVHV)
819	{
820	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
821	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
822
823	prio = prio > PRIO_MAX ? PRIO_MAX
824	: prio < PRIO_MIN ? PRIO_MIN
825	: prio;
826
827	av_push (coro_ready [prio - PRIO_MIN], sv);
828	coro_nready++;
829
830	return;
831	}
832
833	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++;
834	}	851	}
835		852
836	static SV *	853	static SV *
837	coro_deq (int min_prio)	854	coro_deq (int min_prio)
838	{	855	{
…		…
841	min_prio -= PRIO_MIN;	858	min_prio -= PRIO_MIN;
842	if (min_prio < 0)	859	if (min_prio < 0)
843	min_prio = 0;	860	min_prio = 0;
844		861
845	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	862	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
846	if (av_len (coro_ready[prio]) >= 0)	863	if (AvFILLp (coro_ready [prio]) >= 0)
847	{	864	{
848	coro_nready--;	865	coro_nready--;
849	return av_shift (coro_ready[prio]);	866	return av_shift (coro_ready [prio]);
850	}	867	}
851		868
852	return 0;	869	return 0;
853	}	870	}
854		871
855	static void	872	static void
856	api_ready (SV *coro)	873	api_ready (SV *coro)
857	{	874	{
		875	dTHX;
		876
858	if (SvROK (coro))	877	if (SvROK (coro))
859	coro = SvRV (coro);	878	coro = SvRV (coro);
860		879
		880	LOCK;
861	coro_enq (SvREFCNT_inc (coro));	881	coro_enq (SvREFCNT_inc (coro));
		882	UNLOCK;
		883	}
		884
		885	static void
		886	prepare_schedule (struct transfer_args *ta)
		887	{
		888	SV *current, *prev, *next;
		889
		890	current = GvSV (coro_current);
		891
		892	for (;;)
		893	{
		894	LOCK;
		895	next = coro_deq (PRIO_MIN);
		896	UNLOCK;
		897
		898	if (next)
		899	break;
		900
		901	{
		902	dSP;
		903
		904	ENTER;
		905	SAVETMPS;
		906
		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);
862	}	938	}
863		939
864	static void	940	static void
865	api_schedule (void)	941	api_schedule (void)
866	{	942	{
867	SV *prev, *next;	943	dTHX;
		944	struct transfer_args ta;
868		945
869	prev = SvRV (GvSV (coro_current));	946	prepare_schedule (&ta);
870	next = coro_deq (PRIO_MIN);	947	TRANSFER (ta);
871
872	if (!next)
873	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
874
875	/* free this only after the transfer */
876	coro_mortal = prev;
877	SV_CORO (prev, "Coro::schedule");
878
879	SvRV (GvSV (coro_current)) = next;
880
881	SV_CORO (next, "Coro::schedule");
882
883	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
884	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
885	}	948	}
886		949
887	static void	950	static void
888	api_cede (void)	951	api_cede (void)
889	{	952	{
890	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	953	dTHX;
		954	struct transfer_args ta;
891		955
892	api_schedule ();	956	prepare_cede (&ta);
		957	TRANSFER (ta);
893	}	958	}
894		959
895	MODULE = Coro::State PACKAGE = Coro::State	960	MODULE = Coro::State PACKAGE = Coro::State
896		961
897	PROTOTYPES: ENABLE	962	PROTOTYPES: DISABLE
898		963
899	BOOT:	964	BOOT:
900	{ /* {} necessary for stoopid perl-5.6.x */	965	{
901	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	966	#ifdef USE_ITHREADS
902	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	967	MUTEX_INIT (&coro_mutex);
		968	#endif
		969	BOOT_PAGESIZE;
		970
903	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	971	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
904		972
905	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	973	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
906	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	974	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
907	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	975	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
908	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
909
910	if (!padlist_cache)
911	padlist_cache = newHV ();
912		976
913	main_mainstack = PL_mainstack;	977	main_mainstack = PL_mainstack;
914		978
915	coroapi.ver = CORO_API_VERSION;	979	coroapi.ver = CORO_API_VERSION;
916	coroapi.transfer = api_transfer;	980	coroapi.transfer = api_transfer;
917	}
918		981
919	Coro::State	982	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
920	_newprocess(args)	983	}
921	SV * args	984
922	PROTOTYPE: $	985	SV *
		986	new (char *klass, ...)
923	CODE:	987	CODE:
924	Coro__State coro;	988	{
		989	struct coro *coro;
		990	HV *hv;
		991	int i;
925		992
926	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
927	croak ("Coro::State::_newprocess expects an arrayref");
928
929	New (0, coro, 1, struct coro);	993	Newz (0, coro, 1, struct coro);
		994	coro->args = newAV ();
930		995
931	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	996	hv = newHV ();
932	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;
933	coro->stack = 0;	998	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
934		999
935	RETVAL = coro;	1000	for (i = 1; i < items; i++)
		1001	av_push (coro->args, newSVsv (ST (i)));
		1002	}
936	OUTPUT:	1003	OUTPUT:
937	RETVAL	1004	RETVAL
938		1005
939	void	1006	void
940	transfer(prev, next, flags)	1007	_set_stacklevel (...)
941	SV *prev	1008	ALIAS:
942	SV *next	1009	Coro::State::transfer = 1
943	int flags	1010	Coro::schedule = 2
944	PROTOTYPE: @	1011	Coro::cede = 3
		1012	Coro::Cont::yield = 4
945	CODE:	1013	CODE:
946	PUTBACK;	1014	{
947	SV_CORO (next, "Coro::transfer");	1015	struct transfer_args ta;
948	SV_CORO (prev, "Coro::transfer");	1016
949	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1017	switch (ix)
950	SPAGAIN;	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	}
951		1070
952	void	1071	void
953	DESTROY(coro)	1072	_clone_state_from (SV *dst, SV *src)
954	Coro::State coro	1073	CODE:
955	CODE:	1074	{
		1075	struct coro *coro_src = SvSTATE (src);
956		1076
957	if (coro->mainstack && coro->mainstack != main_mainstack)	1077	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
958	{
959	struct coro temp;
960		1078
961	PUTBACK;	1079	++coro_src->refcnt;
962	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;
963	LOAD(aTHX_ coro);	1081	}
964	SPAGAIN;
965
966	destroy_stacks (aTHX);
967
968	LOAD((&temp)); /* this will get rid of defsv etc.. */
969	SPAGAIN;
970
971	coro->mainstack = 0;
972	}
973
974	deallocate_stack (coro);
975
976	Safefree (coro);
977		1082
978	void	1083	void
979	flush()
980	CODE:
981	#ifdef MAY_FLUSH
982	flush_padlist_cache ();
983	#endif
984
985	void
986	_exit(code)	1084	_exit (code)
987	int code	1085	int code
988	PROTOTYPE: $	1086	PROTOTYPE: $
989	CODE:	1087	CODE:
990	#if defined(__GLIBC__) || _POSIX_C_SOURCE
991	_exit (code);	1088	_exit (code);
992	#else
993	signal (SIGTERM, SIG_DFL);
994	raise (SIGTERM);
995	exit (code);
996	#endif
997		1089
998	MODULE = Coro::State PACKAGE = Coro::Cont	1090	int
		1091	cctx_count ()
		1092	CODE:
		1093	RETVAL = cctx_count;
		1094	OUTPUT:
		1095	RETVAL
999		1096
1000	# this is slightly dirty (should expose a c-level api)	1097	int
1001		1098	cctx_idle ()
1002	void	1099	CODE:
1003	yield(...)	1100	RETVAL = cctx_idle;
1004	PROTOTYPE: @	1101	OUTPUT:
1005	CODE:	1102	RETVAL
1006	static SV *returnstk;
1007	SV *sv;
1008	AV *defav = GvAV (PL_defgv);
1009	struct coro *prev, *next;
1010
1011	if (!returnstk)
1012	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1013
1014	/* set up @_ -- ugly */
1015	av_clear (defav);
1016	av_fill (defav, items - 1);
1017	while (items--)
1018	av_store (defav, items, SvREFCNT_inc (ST(items)));
1019
1020	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1021	sv = av_pop ((AV *)SvRV (returnstk));
1022	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1023	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1024	SvREFCNT_dec (sv);
1025
1026	transfer(aTHX_ prev, next, 0);
1027		1103
1028	MODULE = Coro::State PACKAGE = Coro	1104	MODULE = Coro::State PACKAGE = Coro
1029		1105
1030	# this is slightly dirty (should expose a c-level api)
1031
1032	BOOT:	1106	BOOT:
1033	{	1107	{
1034	int i;	1108	int i;
		1109
1035	HV *stash = gv_stashpv ("Coro", TRUE);	1110	coro_stash = gv_stashpv ("Coro", TRUE);
1036		1111
1037	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1112	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1038	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1113	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1039	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1114	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1040	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1115	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1041	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1116	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1042	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1117	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1043		1118
1044	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1119	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1045	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1120	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1046		1121
1047	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1122	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1055	coroapi.ready = api_ready;	1130	coroapi.ready = api_ready;
1056	coroapi.nready = &coro_nready;	1131	coroapi.nready = &coro_nready;
1057	coroapi.current = coro_current;	1132	coroapi.current = coro_current;
1058		1133
1059	GCoroAPI = &coroapi;	1134	GCoroAPI = &coroapi;
1060	sv_setiv(sv, (IV)&coroapi);	1135	sv_setiv (sv, (IV)&coroapi);
1061	SvREADONLY_on(sv);	1136	SvREADONLY_on (sv);
1062	}	1137	}
1063	}	1138	}
1064		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
1065	void	1160	void
1066	ready(self)	1161	ready (SV *self)
1067	SV * self
1068	PROTOTYPE: $	1162	PROTOTYPE: $
1069	CODE:	1163	CODE:
1070	api_ready (self);	1164	api_ready (self);
1071		1165
1072	int	1166	int
1073	nready(...)	1167	nready (...)
1074	PROTOTYPE:	1168	PROTOTYPE:
1075	CODE:	1169	CODE:
1076	RETVAL = coro_nready;	1170	RETVAL = coro_nready;
1077	OUTPUT:	1171	OUTPUT:
1078	RETVAL	1172	RETVAL
1079		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
1080	void	1197	void
1081	schedule(...)	1198	_set_state (char *data_)
1082	PROTOTYPE:	1199	PROTOTYPE: $
1083	CODE:	1200	CODE:
1084	api_schedule ();	1201	{
		1202	struct {
		1203	int errorno;
		1204	int laststype;
		1205	int laststatval;
		1206	Stat_t statcache;
		1207	} *data = (void *)data_;
1085		1208
1086	void	1209	errno = data->errorno;
1087	cede(...)	1210	PL_laststype = data->laststype;
1088	PROTOTYPE:	1211	PL_laststatval = data->laststatval;
1089	CODE:	1212	PL_statcache = data->statcache;
1090	api_cede ();	1213	}
1091

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