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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.26 by root, Fri Aug 17 01:45:39 2001 UTC vs.
Revision 1.114 by root, Thu Nov 30 21:22:45 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
		69	#else
		70	# define PAGESIZE 0
		71	# define BOOT_PAGESIZE (void)0
		72	#endif
20		73
21	#define MAY_FLUSH /* increases codesize */
22
23	#define SUB_INIT "Coro::State::initialize"
24	#define UCORO_STATE "_coro_state"
25
26	/* The next macro should delcare a variable stacklevel that contains and approximation	74	/* The next macro should declare a variable stacklevel that contains and approximation
27	* to the current C stack pointer. Its property is that it changes with each call	75	* to the current C stack pointer. Its property is that it changes with each call
28	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
30		79
31	#define labs(l) ((l) >= 0 ? (l) : -(l))	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		81
		82	#if __GNUC__ >= 3
		83	# define attribute(x) __attribute__(x)
		84	#else
		85	# define attribute(x)
		86	#endif
		87
		88	#define NOINLINE attribute ((noinline))
32		89
33	#include "CoroAPI.h"	90	#include "CoroAPI.h"
34		91
		92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
		93
		94	#ifdef USE_ITHREADS
		95	static perl_mutex coro_mutex;
		96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		98	#else
		99	# define LOCK (void)0
		100	# define UNLOCK (void)0
		101	#endif
		102
35	static struct CoroAPI coroapi;	103	static struct CoroAPI coroapi;
		104	static AV *main_mainstack; /* used to differentiate between $main and others */
		105	static HV *coro_state_stash, *coro_stash;
		106	static SV *coro_mortal; /* will be freed after next transfer */
36		107
37	/* this is actually not only the c stack but also c registers etc... */	108	static struct coro_cctx *cctx_first;
		109	static int cctx_count, cctx_idle;
		110
		111	/* this is a structure representing a c-level coroutine */
38	typedef struct {	112	typedef struct coro_cctx {
39	int refcnt; /* pointer reference counter */	113	struct coro_cctx *next;
40	int usecnt; /* shared by how many coroutines */
41	int gencnt; /* generation counter */
42		114
43	coro_context cctx;	115	/* the stack */
44
45	void *sptr;	116	void *sptr;
46	long ssize; /* positive == mmap, otherwise malloc */	117	long ssize; /* positive == mmap, otherwise malloc */
47	} coro_stack;
48		118
		119	/* cpu state */
		120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		121	JMPENV *top_env;
		122	coro_context cctx;
		123
		124	int inuse;
		125
		126	#if USE_VALGRIND
		127	int valgrind_id;
		128	#endif
		129	} coro_cctx;
		130
		131	enum {
		132	CF_RUNNING, /* coroutine is running */
		133	CF_READY, /* coroutine is ready */
		134	};
		135
		136	/* this is a structure representing a perl-level coroutine */
49	struct coro {	137	struct coro {
50	/* the optional C context */	138	/* the c coroutine allocated to this perl coroutine, if any */
51	coro_stack *stack;	139	coro_cctx *cctx;
52	void *cursp;	140
		141	/* data associated with this coroutine (initial args) */
		142	AV *args;
53	int gencnt;	143	int refcnt;
		144	int flags;
54		145
55	/* optionally saved, might be zero */	146	/* optionally saved, might be zero */
56	AV *defav;	147	AV *defav;
57	SV *defsv;	148	SV *defsv;
58	SV *errsv;	149	SV *errsv;
59		150
60	/* saved global state not related to stacks */	151	#define VAR(name,type) type name;
61	U8 dowarn;	152	# include "state.h"
62	I32 in_eval;	153	#undef VAR
63		154
64	/* the stacks and related info (callchain etc..) */	155	/* coro process data */
65	PERL_SI *curstackinfo;	156	int prio;
66	AV *curstack;
67	AV *mainstack;
68	SV **stack_sp;
69	OP *op;
70	SV **curpad;
71	SV **stack_base;
72	SV **stack_max;
73	SV **tmps_stack;
74	I32 tmps_floor;
75	I32 tmps_ix;
76	I32 tmps_max;
77	I32 *markstack;
78	I32 *markstack_ptr;
79	I32 *markstack_max;
80	I32 *scopestack;
81	I32 scopestack_ix;
82	I32 scopestack_max;
83	ANY *savestack;
84	I32 savestack_ix;
85	I32 savestack_max;
86	OP **retstack;
87	I32 retstack_ix;
88	I32 retstack_max;
89	COP *curcop;
90	JMPENV *top_env;
91
92	/* data associated with this coroutine (initial args) */
93	AV *args;
94	};	157	};
95		158
96	typedef struct coro *Coro__State;	159	typedef struct coro *Coro__State;
97	typedef struct coro *Coro__State_or_hashref;	160	typedef struct coro *Coro__State_or_hashref;
98		161
99	static AV *main_mainstack; /* used to differentiate between $main and others */	162	static AV *
100	static HV *coro_state_stash;	163	coro_clone_padlist (CV *cv)
101	static SV *ucoro_state_sv;
102	static U32 ucoro_state_hash;
103	static HV *padlist_cache;
104
105	/* mostly copied from op.c:cv_clone2 */
106	STATIC AV *
107	clone_padlist (AV *protopadlist)
108	{	164	{
109	AV *av;	165	AV *padlist = CvPADLIST (cv);
110	I32 ix;
111	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
112	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
113	SV **pname = AvARRAY (protopad_name);
114	SV **ppad = AvARRAY (protopad);
115	I32 fname = AvFILLp (protopad_name);
116	I32 fpad = AvFILLp (protopad);
117	AV *newpadlist, *newpad_name, *newpad;	166	AV *newpadlist, *newpad;
118	SV **npad;
119
120	newpad_name = newAV ();
121	for (ix = fname; ix >= 0; ix--)
122	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124	newpad = newAV ();
125	av_fill (newpad, AvFILLp (protopad));
126	npad = AvARRAY (newpad);
127		167
128	newpadlist = newAV ();	168	newpadlist = newAV ();
129	AvREAL_off (newpadlist);	169	AvREAL_off (newpadlist);
130	av_store (newpadlist, 0, (SV *) newpad_name);	170	#if PERL_VERSION_ATLEAST (5,9,0)
		171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		172	#else
		173	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		174	#endif
		175	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		176	--AvFILLp (padlist);
		177
		178	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
131	av_store (newpadlist, 1, (SV *) newpad);	179	av_store (newpadlist, 1, (SV *)newpad);
132		180
133	av = newAV (); /* will be @_ */	181	return newpadlist;
134	av_extend (av, 0);	182	}
135	av_store (newpad, 0, (SV *) av);
136	AvFLAGS (av) = AVf_REIFY;
137		183
138	for (ix = fpad; ix > 0; ix--)	184	static void
		185	free_padlist (AV *padlist)
		186	{
		187	/* may be during global destruction */
		188	if (SvREFCNT (padlist))
139	{	189	{
140	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	190	I32 i = AvFILLp (padlist);
141	if (namesv && namesv != &PL_sv_undef)	191	while (i >= 0)
142	{	192	{
143	char *name = SvPVX (namesv); /* XXX */	193	SV **svp = av_fetch (padlist, i--, FALSE);
144	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	194	if (svp)
145	{ /* lexical from outside? */
146	npad[ix] = SvREFCNT_inc (ppad[ix]);
147	}	195	{
148	else
149	{ /* our own lexical */
150	SV *sv;	196	SV *sv;
151	if (*name == '&')	197	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
152	sv = SvREFCNT_inc (ppad[ix]);	198	SvREFCNT_dec (sv);
153	else if (*name == '@')	199
154	sv = (SV *) newAV ();	200	SvREFCNT_dec (*svp);
155	else if (*name == '%')
156	sv = (SV *) newHV ();
157	else
158	sv = NEWSV (0, 0);
159	if (!SvPADBUSY (sv))
160	SvPADMY_on (sv);
161	npad[ix] = sv;
162	}	201	}
163	}	202	}
164	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	203
165	{	204	SvREFCNT_dec ((SV*)padlist);
166	npad[ix] = SvREFCNT_inc (ppad[ix]);
167	}
168	else
169	{
170	SV *sv = NEWSV (0, 0);
171	SvPADTMP_on (sv);
172	npad[ix] = sv;
173	}
174	}	205	}
		206	}
175		207
176	#if 0 /* return -ENOTUNDERSTOOD */	208	static int
177	/* Now that vars are all in place, clone nested closures. */	209	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		210	{
		211	AV *padlist;
		212	AV *av = (AV *)mg->mg_obj;
178		213
179	for (ix = fpad; ix > 0; ix--) {	214	/* casting is fun. */
180	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
181	if (namesv	216	free_padlist (padlist);
182	&& namesv != &PL_sv_undef	217
183	&& !(SvFLAGS(namesv) & SVf_FAKE)	218	SvREFCNT_dec (av);
184	&& *SvPVX(namesv) == '&'	219
185	&& CvCLONE(ppad[ix]))	220	return 0;
186	{	221	}
187	CV *kid = cv_clone((CV*)ppad[ix]);	222
188	SvREFCNT_dec(ppad[ix]);	223	#define PERL_MAGIC_coro PERL_MAGIC_ext
189	CvCLONE_on(kid);	224
190	SvPADMY_on(kid);	225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
191	npad[ix] = (SV*)kid;	226
192	}	227	#define CORO_MAGIC(cv) \
		228	SvMAGIC (cv) \
		229	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		230	? SvMAGIC (cv) \
		231	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		232	: 0
		233
		234	/* the next two functions merely cache the padlists */
		235	static void
		236	get_padlist (CV *cv)
		237	{
		238	MAGIC *mg = CORO_MAGIC (cv);
		239	AV *av;
		240
		241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
		242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		243	else
		244	{
		245	#if 0
		246	/* this is probably cleaner, but also slower? */
		247	CV *cp = Perl_cv_clone (cv);
		248	CvPADLIST (cv) = CvPADLIST (cp);
		249	CvPADLIST (cp) = 0;
		250	SvREFCNT_dec (cp);
		251	#else
		252	CvPADLIST (cv) = coro_clone_padlist (cv);
		253	#endif
		254	}
		255	}
		256
		257	static void
		258	put_padlist (CV *cv)
		259	{
		260	MAGIC *mg = CORO_MAGIC (cv);
		261	AV *av;
		262
		263	if (!mg)
		264	{
		265	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		266	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		267	mg->mg_virtual = &vtbl_coro;
		268	mg->mg_obj = (SV *)newAV ();
193	}	269	}
194	#endif
195		270
196	return newpadlist;	271	av = (AV *)mg->mg_obj;
197	}
198		272
199	#ifdef MAY_FLUSH	273	if (AvFILLp (av) >= AvMAX (av))
200	STATIC AV *	274	av_extend (av, AvMAX (av) + 1);
201	free_padlist (AV *padlist)
202	{
203	/* may be during global destruction */
204	if (SvREFCNT(padlist))
205	{
206	I32 i = AvFILLp(padlist);
207	while (i >= 0)
208	{
209	SV **svp = av_fetch(padlist, i--, FALSE);
210	SV *sv = svp ? *svp : Nullsv;
211	if (sv)
212	SvREFCNT_dec(sv);
213	}
214		275
215	SvREFCNT_dec((SV*)padlist);	276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
216	}
217	}	277	}
218	#endif
219
220	/* the next two functions merely cache the padlists */
221	STATIC void
222	get_padlist (CV *cv)
223	{
224	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
225
226	if (he && AvFILLp ((AV *)*he) >= 0)
227	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
228	else
229	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230	}
231
232	STATIC void
233	put_padlist (CV *cv)
234	{
235	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
236
237	if (SvTYPE (*he) != SVt_PVAV)
238	{
239	SvREFCNT_dec (*he);
240	*he = (SV *)newAV ();
241	}
242
243	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
244	}
245
246	#ifdef MAY_FLUSH
247	STATIC void
248	flush_padlist_cache ()
249	{
250	HV *hv = padlist_cache;
251	padlist_cache = newHV ();
252
253	if (hv_iterinit (hv))
254	{
255	HE *he;
256	AV *padlist;
257
258	while (!!(he = hv_iternext (hv)))
259	{
260	AV *av = (AV *)HeVAL(he);
261
262	/* casting is fun. */
263	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
264	free_padlist (padlist);
265	}
266	}
267
268	SvREFCNT_dec (hv);
269	}
270	#endif
271		278
272	#define SB do {	279	#define SB do {
273	#define SE } while (0)	280	#define SE } while (0)
274		281
275	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	282	#define LOAD(state) load_state((state));
276	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	283	#define SAVE(state,flags) save_state((state),(flags));
277		284
278	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	285	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
279		286
280	static void	287	static void
281	load_state(pTHX_ Coro__State c)	288	load_state(Coro__State c)
282	{	289	{
283	PL_dowarn = c->dowarn;	290	#define VAR(name,type) PL_ ## name = c->name;
284	PL_in_eval = c->in_eval;	291	# include "state.h"
285		292	#undef VAR
286	PL_curstackinfo = c->curstackinfo;
287	PL_curstack = c->curstack;
288	PL_mainstack = c->mainstack;
289	PL_stack_sp = c->stack_sp;
290	PL_op = c->op;
291	PL_curpad = c->curpad;
292	PL_stack_base = c->stack_base;
293	PL_stack_max = c->stack_max;
294	PL_tmps_stack = c->tmps_stack;
295	PL_tmps_floor = c->tmps_floor;
296	PL_tmps_ix = c->tmps_ix;
297	PL_tmps_max = c->tmps_max;
298	PL_markstack = c->markstack;
299	PL_markstack_ptr = c->markstack_ptr;
300	PL_markstack_max = c->markstack_max;
301	PL_scopestack = c->scopestack;
302	PL_scopestack_ix = c->scopestack_ix;
303	PL_scopestack_max = c->scopestack_max;
304	PL_savestack = c->savestack;
305	PL_savestack_ix = c->savestack_ix;
306	PL_savestack_max = c->savestack_max;
307	PL_retstack = c->retstack;
308	PL_retstack_ix = c->retstack_ix;
309	PL_retstack_max = c->retstack_max;
310	PL_curcop = c->curcop;
311	PL_top_env = c->top_env;
312		293
313	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316		297
…		…
319	CV *cv;	300	CV *cv;
320		301
321	/* now do the ugly restore mess */	302	/* now do the ugly restore mess */
322	while ((cv = (CV *)POPs))	303	while ((cv = (CV *)POPs))
323	{	304	{
324	AV *padlist = (AV *)POPs;
325
326	if (padlist)
327	{
328	put_padlist (cv); /* mark this padlist as available */	305	put_padlist (cv); /* mark this padlist as available */
329	CvPADLIST(cv) = padlist;	306	CvDEPTH (cv) = PTR2IV (POPs);
330	#ifdef USE_THREADS	307	CvPADLIST (cv) = (AV *)POPs;
331	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332	#endif
333	}
334
335	++CvDEPTH(cv);
336	}	308	}
337		309
338	PUTBACK;	310	PUTBACK;
339	}	311	}
340	}	312	}
341		313
342	static void	314	static void
343	save_state(pTHX_ Coro__State c, int flags)	315	save_state(Coro__State c, int flags)
344	{	316	{
345	{	317	{
346	dSP;	318	dSP;
347	I32 cxix = cxstack_ix;	319	I32 cxix = cxstack_ix;
348	PERL_CONTEXT *ccstk = cxstack;	320	PERL_CONTEXT *ccstk = cxstack;
…		…
355		327
356	PUSHs (Nullsv);	328	PUSHs (Nullsv);
357	/* this loop was inspired by pp_caller */	329	/* this loop was inspired by pp_caller */
358	for (;;)	330	for (;;)
359	{	331	{
360	do	332	while (cxix >= 0)
361	{	333	{
362	PERL_CONTEXT *cx = &ccstk[cxix--];	334	PERL_CONTEXT *cx = &ccstk[cxix--];
363		335
364	if (CxTYPE(cx) == CXt_SUB)	336	if (CxTYPE(cx) == CXt_SUB)
365	{	337	{
366	CV *cv = cx->blk_sub.cv;	338	CV *cv = cx->blk_sub.cv;
		339
367	if (CvDEPTH(cv))	340	if (CvDEPTH (cv))
368	{	341	{
369	#ifdef USE_THREADS
370	/*XPUSHs ((SV *)CvOWNER(cv));*/
371	/*CvOWNER(cv) = 0;*/
372	/*error must unlock this cv etc.. etc...*/
373	#endif
374	EXTEND (SP, CvDEPTH(cv)*2);	342	EXTEND (SP, 3);
375
376	while (--CvDEPTH(cv))
377	{
378	/* this tells the restore code to increment CvDEPTH */
379	PUSHs (Nullsv);
380	PUSHs ((SV *)cv);
381	}
382		343
383	PUSHs ((SV *)CvPADLIST(cv));	344	PUSHs ((SV *)CvPADLIST(cv));
		345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
384	PUSHs ((SV *)cv);	346	PUSHs ((SV *)cv);
385		347
		348	CvDEPTH (cv) = 0;
386	get_padlist (cv); /* this is a monster */	349	get_padlist (cv);
387	}	350	}
388	}	351	}
		352	#ifdef CXt_FORMAT
389	else if (CxTYPE(cx) == CXt_FORMAT)	353	else if (CxTYPE(cx) == CXt_FORMAT)
390	{	354	{
391	/* I never used formats, so how should I know how these are implemented? */	355	/* I never used formats, so how should I know how these are implemented? */
392	/* my bold guess is as a simple, plain sub... */	356	/* my bold guess is as a simple, plain sub... */
393	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	357	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394	}	358	}
		359	#endif
395	}	360	}
396	while (cxix >= 0);
397		361
398	if (top_si->si_type == PERLSI_MAIN)	362	if (top_si->si_type == PERLSI_MAIN)
399	break;	363	break;
400		364
401	top_si = top_si->si_prev;	365	top_si = top_si->si_prev;
…		…
408		372
409	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	373	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
410	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
411	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
412		376
413	/* I have not the slightest idea of why av_reify is necessary */	377	#define VAR(name,type)c->name = PL_ ## name;
414	/* but if it's missing the defav contents magically get replaced sometimes */	378	# include "state.h"
415	if (c->defav)	379	#undef VAR
416	av_reify (c->defav);
417
418	c->dowarn = PL_dowarn;
419	c->in_eval = PL_in_eval;
420
421	c->curstackinfo = PL_curstackinfo;
422	c->curstack = PL_curstack;
423	c->mainstack = PL_mainstack;
424	c->stack_sp = PL_stack_sp;
425	c->op = PL_op;
426	c->curpad = PL_curpad;
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	}	380	}
448		381
449	/*	382	/*
450	* allocate various perl stacks. This is an exact copy	383	* allocate various perl stacks. This is an exact copy
451	* of perl.c:init_stacks, except that it uses less memory	384	* of perl.c:init_stacks, except that it uses less memory
452	* on the assumption that coroutines do not usually need	385	* on the (sometimes correct) assumption that coroutines do
453	* a lot of stackspace.	386	* not usually need a lot of stackspace.
454	*/	387	*/
455	STATIC void	388	static void
456	coro_init_stacks (pTHX)	389	coro_init_stacks ()
457	{	390	{
458	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
459	PL_curstackinfo->si_type = PERLSI_MAIN;	392	PL_curstackinfo->si_type = PERLSI_MAIN;
460	PL_curstack = PL_curstackinfo->si_stack;	393	PL_curstack = PL_curstackinfo->si_stack;
461	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
471		404
472	New(54,PL_markstack,16,I32);	405	New(54,PL_markstack,16,I32);
473	PL_markstack_ptr = PL_markstack;	406	PL_markstack_ptr = PL_markstack;
474	PL_markstack_max = PL_markstack + 16;	407	PL_markstack_max = PL_markstack + 16;
475		408
		409	#ifdef SET_MARK_OFFSET
476	SET_MARK_OFFSET;	410	SET_MARK_OFFSET;
		411	#endif
477		412
478	New(54,PL_scopestack,16,I32);	413	New(54,PL_scopestack,16,I32);
479	PL_scopestack_ix = 0;	414	PL_scopestack_ix = 0;
480	PL_scopestack_max = 16;	415	PL_scopestack_max = 16;
481		416
482	New(54,PL_savestack,96,ANY);	417	New(54,PL_savestack,96,ANY);
483	PL_savestack_ix = 0;	418	PL_savestack_ix = 0;
484	PL_savestack_max = 96;	419	PL_savestack_max = 96;
485		420
		421	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	422	New(54,PL_retstack,8,OP*);
487	PL_retstack_ix = 0;	423	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	424	PL_retstack_max = 8;
		425	#endif
489	}	426	}
490		427
491	/*	428	/*
492	* destroy the stacks, the callchain etc...	429	* destroy the stacks, the callchain etc...
493	* still there is a memleak of 128 bytes...
494	*/	430	*/
495	STATIC void	431	static void
496	destroy_stacks(pTHX)	432	coro_destroy_stacks ()
497	{	433	{
		434	if (!IN_DESTRUCT)
		435	{
498	/* is this ugly, I ask? */	436	/* is this ugly, I ask? */
499	while (PL_scopestack_ix)	437	LEAVE_SCOPE (0);
500	LEAVE;
501		438
502	/* sure it is, but more important: is it correct?? :/ */	439	/* sure it is, but more important: is it correct?? :/ */
503	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504	FREETMPS;	440	FREETMPS;
		441
		442	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
		443	}
505		444
506	while (PL_curstackinfo->si_next)	445	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;	446	PL_curstackinfo = PL_curstackinfo->si_next;
508		447
509	while (PL_curstackinfo)	448	while (PL_curstackinfo)
510	{	449	{
511	PERL_SI *p = PL_curstackinfo->si_prev;	450	PERL_SI *p = PL_curstackinfo->si_prev;
512		451
513	{	452	{ /*D*//*remove*/
514	dSP;	453	dSP;
515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	454	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516	PUTBACK; /* possibly superfluous */	455	PUTBACK; /* possibly superfluous */
517	}	456	}
518		457
519	if (PL_main_cv != Nullcv) /* don't during destruction. hack? */	458	if (!IN_DESTRUCT)
520	dounwind(-1);	459	{
521		460	dounwind (-1);/*D*//*remove*/
522	SvREFCNT_dec(PL_curstackinfo->si_stack);	461	SvREFCNT_dec (PL_curstackinfo->si_stack);
		462	}
		463
523	Safefree(PL_curstackinfo->si_cxstack);	464	Safefree (PL_curstackinfo->si_cxstack);
524	Safefree(PL_curstackinfo);	465	Safefree (PL_curstackinfo);
525	PL_curstackinfo = p;	466	PL_curstackinfo = p;
526	}	467	}
527		468
528	Safefree(PL_tmps_stack);	469	Safefree (PL_tmps_stack);
529	Safefree(PL_markstack);	470	Safefree (PL_markstack);
530	Safefree(PL_scopestack);	471	Safefree (PL_scopestack);
531	Safefree(PL_savestack);	472	Safefree (PL_savestack);
		473	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree(PL_retstack);	474	Safefree (PL_retstack);
533	}
534
535	static void
536	allocate_stack (Coro__State ctx, int alloc)
537	{
538	coro_stack *stack;
539
540	New (0, stack, 1, coro_stack);
541
542	stack->refcnt = 1;
543	stack->usecnt = 1;
544	stack->gencnt = ctx->gencnt = 0;
545	if (alloc)
546	{
547	#ifdef HAVE_MMAP
548	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
549	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
550	if (stack->sptr == (void *)-1)
551	#endif	475	#endif
552	{
553	/*FIXME*//*D*//* reasonable stack size! */
554	stack->ssize = -4096 * sizeof (long);
555	New (0, stack->sptr, 4096, long);
556	}
557	}
558	else
559	stack->sptr = 0;
560
561	ctx->stack = stack;
562	}	476	}
563		477
564	static void	478	static void
565	deallocate_stack (Coro__State ctx)	479	setup_coro (struct coro *coro)
566	{
567	coro_stack *stack = ctx->stack;
568
569	ctx->stack = 0;
570
571	if (stack)
572	{
573	if (!--stack->refcnt)
574	{
575	#ifdef HAVE_MMAP
576	if (stack->ssize > 0 && stack->sptr)
577	munmap (stack->sptr, stack->ssize);
578	else
579	#else
580	Safefree (stack->sptr);
581	#endif
582	Safefree (stack);
583	}
584	else if (ctx->gencnt == stack->gencnt)
585	--stack->usecnt;
586	}
587	}
588
589	static void
590	setup_coro (void *arg)
591	{	480	{
592	/*	481	/*
593	* emulate part of the perl startup here.	482	* emulate part of the perl startup here.
594	*/	483	*/
		484
		485	coro_init_stacks ();
		486
		487	PL_curcop = 0;
		488	PL_in_eval = 0;
		489	PL_curpm = 0;
		490
		491	{
		492	dSP;
		493	LOGOP myop;
		494
		495	/* I have no idea why this is needed, but it is */
		496	PUSHMARK (SP);
		497
		498	SvREFCNT_dec (GvAV (PL_defgv));
		499	GvAV (PL_defgv) = coro->args; coro->args = 0;
		500
		501	Zero (&myop, 1, LOGOP);
		502	myop.op_next = Nullop;
		503	myop.op_flags = OPf_WANT_VOID;
		504
		505	PL_op = (OP *)&myop;
		506
		507	PUSHMARK (SP);
		508	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		509	PUTBACK;
		510	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		511	SPAGAIN;
		512
		513	ENTER; /* necessary e.g. for dounwind */
		514	}
		515	}
		516
		517	static void
		518	free_coro_mortal ()
		519	{
		520	if (coro_mortal)
		521	{
		522	SvREFCNT_dec (coro_mortal);
		523	coro_mortal = 0;
		524	}
		525	}
		526
		527	static void NOINLINE
		528	prepare_cctx (coro_cctx *cctx)
		529	{
595	dSP;	530	dSP;
596	Coro__State ctx = (Coro__State)arg;	531	LOGOP myop;
597	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
598		532
599	coro_init_stacks (aTHX);	533	Zero (&myop, 1, LOGOP);
600	/*PL_curcop = 0;*/	534	myop.op_next = PL_op;
601	/*PL_in_eval = PL_in_eval;*/ /* inherit */	535	myop.op_flags = OPf_WANT_VOID;
602	SvREFCNT_dec (GvAV (PL_defgv));
603	GvAV (PL_defgv) = ctx->args;
604		536
		537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		538
		539	PUSHMARK (SP);
		540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		541	PUTBACK;
		542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
605	SPAGAIN;	543	SPAGAIN;
606
607	if (ctx->stack)
608	{
609	ctx->cursp = 0;
610
611	PUSHMARK(SP);
612	PUTBACK;
613	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
614
615	if (SvTRUE (ERRSV))
616	croak (NULL);
617	else
618	croak ("FATAL: CCTXT coroutine returned!");
619	}
620	else
621	{
622	UNOP myop;
623
624	PL_op = (OP *)&myop;
625
626	Zero(&myop, 1, UNOP);
627	myop.op_next = Nullop;
628	myop.op_flags = OPf_WANT_VOID;
629
630	PUSHMARK(SP);
631	XPUSHs (sub_init);
632	/*
633	* the next line is slightly wrong, as PL_op->op_next
634	* is actually being executed so we skip the first op.
635	* that doesn't matter, though, since it is only
636	* pp_nextstate and we never return...
637	* ah yes, and I don't care anyways ;)
638	*/
639	PUTBACK;
640	PL_op = pp_entersub();
641	SPAGAIN;
642
643	ENTER; /* necessary e.g. for dounwind */
644	}
645	}	544	}
646		545
647	static void	546	static void
648	continue_coro (void *arg)	547	coro_run (void *arg)
649	{	548	{
		549	/* coro_run is the alternative epilogue of transfer() */
		550	UNLOCK;
		551
650	/*	552	/*
651	* this is a _very_ stripped down perl interpreter ;)	553	* this is a _very_ stripped down perl interpreter ;)
652	*/	554	*/
653	Coro__State ctx = (Coro__State)arg;	555	PL_top_env = &PL_start_env;
654		556
655	/*FIXME*//* must set up top_env here */	557	/* inject call to cctx_init */
656	ctx->cursp = 0;	558	prepare_cctx ((coro_cctx *)arg);
657	PL_op = PL_op->op_next;
658	CALLRUNOPS(aTHX);
659		559
		560	/* somebody will hit me for both perl_run and PL_restartop */
		561	perl_run (PL_curinterp);
		562
		563	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
660	abort ();	564	abort ();
661	}	565	}
662		566
663	STATIC void	567	static coro_cctx *
		568	cctx_new ()
		569	{
		570	coro_cctx *cctx;
		571
		572	++cctx_count;
		573
		574	New (0, cctx, 1, coro_cctx);
		575
		576	#if HAVE_MMAP
		577
		578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		579	/* mmap suppsedly does allocate-on-write for us */
		580	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		581
		582	if (cctx->sptr == (void *)-1)
		583	{
		584	perror ("FATAL: unable to mmap stack for coroutine");
		585	_exit (EXIT_FAILURE);
		586	}
		587
		588	# if STACKGUARD
		589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		590	# endif
		591
		592	#else
		593
		594	cctx->ssize = STACKSIZE * (long)sizeof (long);
		595	New (0, cctx->sptr, STACKSIZE, long);
		596
		597	if (!cctx->sptr)
		598	{
		599	perror ("FATAL: unable to malloc stack for coroutine");
		600	_exit (EXIT_FAILURE);
		601	}
		602
		603	#endif
		604
		605	#if USE_VALGRIND
		606	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		607	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		608	cctx->ssize + (char *)cctx->sptr
		609	);
		610	#endif
		611
		612	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		613
		614	return cctx;
		615	}
		616
		617	static void
		618	cctx_free (coro_cctx *cctx)
		619	{
		620	if (!cctx)
		621	return;
		622
		623	--cctx_count;
		624
		625	#if USE_VALGRIND
		626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		627	#endif
		628
		629	#if HAVE_MMAP
		630	munmap (cctx->sptr, cctx->ssize);
		631	#else
		632	Safefree (cctx->sptr);
		633	#endif
		634
		635	Safefree (cctx);
		636	}
		637
		638	static coro_cctx *
		639	cctx_get ()
		640	{
		641	coro_cctx *cctx;
		642
		643	if (cctx_first)
		644	{
		645	--cctx_idle;
		646	cctx = cctx_first;
		647	cctx_first = cctx->next;
		648	}
		649	else
		650	{
		651	cctx = cctx_new ();
		652	PL_op = PL_op->op_next;
		653	}
		654
		655	return cctx;
		656	}
		657
		658	static void
		659	cctx_put (coro_cctx *cctx)
		660	{
		661	++cctx_idle;
		662	cctx->next = cctx_first;
		663	cctx_first = cctx;
		664	}
		665
		666	/* never call directly, always through the coro_state_transfer global variable */
		667	static void NOINLINE
664	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	668	transfer (struct coro *prev, struct coro *next, int flags)
665	{	669	{
666	dSP;
667	dSTACKLEVEL;	670	dSTACKLEVEL;
668		671
		672	/* sometimes transfer is only called to set idle_sp */
		673	if (flags == TRANSFER_SET_STACKLEVEL)
		674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
669	if (prev != next)	675	else if (prev != next)
670	{	676	{
		677	coro_cctx *prev__cctx;
		678
		679	if (!prev->cctx)
		680	{
		681	/* create a new empty context */
		682	Newz (0, prev->cctx, 1, coro_cctx);
		683	prev->cctx->inuse = 1;
		684	prev->flags |= CF_RUNNING;
		685	}
		686
		687	if (!prev->flags & CF_RUNNING)
		688	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		689
		690	if (next->flags & CF_RUNNING)
		691	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		692
		693	prev->flags &= ~CF_RUNNING;
		694	next->flags |= CF_RUNNING;
		695
		696	LOCK;
		697
671	if (next->mainstack)	698	if (next->mainstack)
672	{	699	{
		700	/* coroutine already started */
673	SAVE (prev, flags);	701	SAVE (prev, flags);
674	LOAD (next);	702	LOAD (next);
675
676	/* mark this state as in-use */
677	next->mainstack = 0;
678	next->tmps_ix = -2;
679
680	/* stacklevel changed? if yes, grab the stack for us! */
681	if (flags & TRANSFER_SAVE_CCTXT)
682	{
683	if (!prev->stack)
684	allocate_stack (prev, 0);
685	else if (prev->cursp != stacklevel
686	&& prev->stack->usecnt > 1)
687	{
688	prev->gencnt = ++prev->stack->gencnt;
689	prev->stack->usecnt = 1;
690	}
691
692	/* has our stack been invalidated? */
693	if (next->stack && next->stack->gencnt != next->gencnt)
694	{
695	deallocate_stack (next);
696	allocate_stack (next, 1);
697	coro_create (&(next->stack->cctx),
698	continue_coro, (void *)next,
699	next->stack->sptr, labs (next->stack->ssize));
700	}
701
702	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
703	}
704
705	}	703	}
706	else if (next->tmps_ix == -2)
707	croak ("tried to transfer to running coroutine");
708	else	704	else
709	{	705	{
		706	/* need to start coroutine */
710	SAVE (prev, -1); /* first get rid of the old state */	707	/* first get rid of the old state */
711		708	SAVE (prev, -1);
712	if (flags & TRANSFER_SAVE_CCTXT)	709	/* setup coroutine call */
713	{
714	if (!prev->stack)
715	allocate_stack (prev, 0);
716
717	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
718	{
719	setup_coro (next);
720
721	prev->stack->refcnt++;
722	prev->stack->usecnt++;
723	next->stack = prev->stack;
724	next->gencnt = prev->gencnt;
725	}
726	else
727	{
728	allocate_stack (next, 1);
729	coro_create (&(next->stack->cctx),
730	setup_coro, (void *)next,
731	next->stack->sptr, labs (next->stack->ssize));
732	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733	}
734	}
735	else
736	setup_coro (next);	710	setup_coro (next);
		711	/* need a new stack */
		712	assert (!next->stack);
737	}	713	}
		714
		715	prev__cctx = prev->cctx;
		716
		717	/* possibly "free" the cctx */
		718	if (prev__cctx->idle_sp == STACKLEVEL)
		719	{
		720	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		721	assert (PL_top_env == prev__cctx->top_env);
		722
		723	cctx_put (prev__cctx);
		724	prev->cctx = 0;
		725	}
		726
		727	if (!next->cctx)
		728	next->cctx = cctx_get ();
		729
		730	if (prev__cctx != next->cctx)
		731	{
		732	assert ( prev__cctx->inuse);
		733	assert (!next->cctx->inuse);
		734
		735	prev__cctx->inuse = 0;
		736	next->cctx->inuse = 1;
		737
		738	prev__cctx->top_env = PL_top_env;
		739	PL_top_env = next->cctx->top_env;
		740	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		741	}
		742
		743	free_coro_mortal ();
		744
		745	UNLOCK;
738	}	746	}
739
740	next->cursp = stacklevel;
741	}	747	}
		748
		749	struct transfer_args
		750	{
		751	struct coro *prev, *next;
		752	int flags;
		753	};
		754
		755	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		756
		757	static void
		758	coro_state_destroy (struct coro *coro)
		759	{
		760	if (coro->refcnt--)
		761	return;
		762
		763	if (coro->flags & CF_RUNNING)
		764	croak ("FATAL: tried to destroy currently running coroutine");
		765
		766	if (coro->mainstack && coro->mainstack != main_mainstack)
		767	{
		768	struct coro temp;
		769
		770	SAVE ((&temp), TRANSFER_SAVE_ALL);
		771	LOAD (coro);
		772
		773	coro_destroy_stacks ();
		774
		775	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		776
		777	coro->mainstack = 0;
		778	}
		779
		780	cctx_free (coro->cctx);
		781	SvREFCNT_dec (coro->args);
		782	Safefree (coro);
		783	}
		784
		785	static int
		786	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		787	{
		788	struct coro *coro = (struct coro *)mg->mg_ptr;
		789	mg->mg_ptr = 0;
		790
		791	coro_state_destroy (coro);
		792
		793	return 0;
		794	}
		795
		796	static int
		797	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		798	{
		799	struct coro *coro = (struct coro *)mg->mg_ptr;
		800
		801	++coro->refcnt;
		802
		803	return 0;
		804	}
		805
		806	static MGVTBL coro_state_vtbl = {
		807	0, 0, 0, 0,
		808	coro_state_clear,
		809	0,
		810	#ifdef MGf_DUP
		811	coro_state_dup,
		812	#else
		813	# define MGf_DUP 0
		814	#endif
		815	};
742		816
743	static struct coro *	817	static struct coro *
744	sv_to_coro (SV *arg, const char *funcname, const char *varname)	818	SvSTATE (SV *coro)
745	{	819	{
746	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	820	HV *stash;
		821	MAGIC *mg;
		822
		823	if (SvROK (coro))
		824	coro = SvRV (coro);
		825
		826	stash = SvSTASH (coro);
		827	if (stash != coro_stash && stash != coro_state_stash)
747	{	828	{
748	HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);	829	/* very slow, but rare, check */
749		830	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
750	if (!he)	831	croak ("Coro::State object required");
751	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
752
753	arg = HeVAL(he);
754	}	832	}
755
756	/* must also be changed inside Coro::Cont::yield */
757	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
758	return (struct coro *) SvIV((SV*)SvRV(arg));
759	else
760	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
761	}
762		833
		834	mg = SvMAGIC (coro);
		835	assert (mg->mg_type == PERL_MAGIC_ext);
		836	return (struct coro *)mg->mg_ptr;
		837	}
		838
763	static void	839	static void
		840	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		841	{
		842	ta->prev = SvSTATE (prev);
		843	ta->next = SvSTATE (next);
		844	ta->flags = flags;
		845	}
		846
		847	static void
764	api_transfer(pTHX_ SV *prev, SV *next, int flags)	848	api_transfer (SV *prev, SV *next, int flags)
765	{	849	{
766	transfer(aTHX_ sv_to_coro (prev, "Coro::transfer", "prev"),	850	dTHX;
767	sv_to_coro (next, "Coro::transfer", "next"),	851	struct transfer_args ta;
768	flags);	852
		853	prepare_transfer (&ta, prev, next, flags);
		854	TRANSFER (ta);
769	}	855	}
770		856
771	/** Coro ********************************************************************/	857	/** Coro ********************************************************************/
772		858
773	#define PRIO_MAX 3	859	#define PRIO_MAX 3
…		…
777	#define PRIO_IDLE -3	863	#define PRIO_IDLE -3
778	#define PRIO_MIN -4	864	#define PRIO_MIN -4
779		865
780	/* for Coro.pm */	866	/* for Coro.pm */
781	static GV *coro_current, *coro_idle;	867	static GV *coro_current, *coro_idle;
782	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	868	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
783	static int coro_nready;	869	static int coro_nready;
784		870
785	static void	871	static void
786	coro_enq (SV *sv)	872	coro_enq (SV *coro_sv)
787	{	873	{
788	if (SvROK (sv))	874	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
789	{
790	SV *hv = SvRV (sv);
791	if (SvTYPE (hv) == SVt_PVHV)
792	{
793	SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0);
794	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
795
796	prio = prio > PRIO_MAX ? PRIO_MAX
797	: prio < PRIO_MIN ? PRIO_MIN
798	: prio;
799
800	av_push (coro_ready [prio - PRIO_MIN], sv);
801	coro_nready++;	875	coro_nready++;
802
803	return;
804	}
805	}
806
807	croak ("Coro::ready tried to enqueue something that is not a coroutine");
808	}	876	}
809		877
810	static SV *	878	static SV *
811	coro_deq (int min_prio)	879	coro_deq (int min_prio)
812	{	880	{
…		…
815	min_prio -= PRIO_MIN;	883	min_prio -= PRIO_MIN;
816	if (min_prio < 0)	884	if (min_prio < 0)
817	min_prio = 0;	885	min_prio = 0;
818		886
819	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
820	if (av_len (coro_ready[prio]) >= 0)	888	if (AvFILLp (coro_ready [prio]) >= 0)
821	{	889	{
822	coro_nready--;	890	coro_nready--;
823	return av_shift (coro_ready[prio]);	891	return av_shift (coro_ready [prio]);
824	}	892	}
825		893
826	return 0;	894	return 0;
827	}	895	}
828		896
829	static void	897	static int
830	api_ready (SV *coro)	898	api_ready (SV *coro_sv)
831	{	899	{
		900	struct coro *coro;
		901
		902	if (SvROK (coro_sv))
		903	coro_sv = SvRV (coro_sv);
		904
		905	coro = SvSTATE (coro_sv);
		906
		907	if (coro->flags & CF_READY)
		908	return 0;
		909
		910	if (coro->flags & CF_RUNNING)
		911	croak ("Coro::ready called on currently running coroutine");
		912
		913	coro->flags |= CF_READY;
		914
		915	LOCK;
832	coro_enq (SvREFCNT_inc (coro));	916	coro_enq (SvREFCNT_inc (coro_sv));
833	}	917	UNLOCK;
834		918
		919	return 1;
		920	}
		921
835	static void	922	static int
836	api_schedule (int cede)	923	api_is_ready (SV *coro_sv)
837	{	924	{
		925	return !!SvSTATE (coro_sv)->flags & CF_READY;
		926	}
		927
		928	static void
		929	prepare_schedule (struct transfer_args *ta)
		930	{
838	SV *prev, *next;	931	SV *current, *prev, *next;
839		932
840	prev = GvSV (coro_current);	933	current = GvSV (coro_current);
841		934
842	if (cede)	935	for (;;)
843	coro_enq (SvREFCNT_inc (prev));	936	{
844		937	LOCK;
845	next = coro_deq (PRIO_MIN);	938	next = coro_deq (PRIO_MIN);
		939	UNLOCK;
846		940
847	if (!next)	941	if (next)
848	next = SvREFCNT_inc (GvSV (coro_idle));	942	break;
849		943
850	GvSV (coro_current) = SvREFCNT_inc (next);	944	{
851	transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"),	945	dSP;
852	sv_to_coro (next, "Coro::schedule", "next coroutine"),	946
853	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);	947	ENTER;
854	SvREFCNT_dec (next);	948	SAVETMPS;
855	SvREFCNT_dec (prev);	949
		950	PUSHMARK (SP);
		951	PUTBACK;
		952	call_sv (GvSV (coro_idle), G_DISCARD);
		953
		954	FREETMPS;
		955	LEAVE;
		956	}
		957	}
		958
		959	prev = SvRV (current);
		960	SvRV (current) = next;
		961
		962	/* free this only after the transfer */
		963	LOCK;
		964	free_coro_mortal ();
		965	UNLOCK;
		966	coro_mortal = prev;
		967
		968	ta->prev = SvSTATE (prev);
		969	ta->next = SvSTATE (next);
		970	ta->flags = TRANSFER_SAVE_ALL;
		971
		972	ta->next->flags &= ~CF_READY;
		973	}
		974
		975	static void
		976	prepare_cede (struct transfer_args *ta)
		977	{
		978	api_ready (GvSV (coro_current));
		979
		980	prepare_schedule (ta);
		981	}
		982
		983	static void
		984	api_schedule (void)
		985	{
		986	dTHX;
		987	struct transfer_args ta;
		988
		989	prepare_schedule (&ta);
		990	TRANSFER (ta);
		991	}
		992
		993	static void
		994	api_cede (void)
		995	{
		996	dTHX;
		997	struct transfer_args ta;
		998
		999	prepare_cede (&ta);
		1000	TRANSFER (ta);
856	}	1001	}
857		1002
858	MODULE = Coro::State PACKAGE = Coro::State	1003	MODULE = Coro::State PACKAGE = Coro::State
859		1004
860	PROTOTYPES: ENABLE	1005	PROTOTYPES: DISABLE
861		1006
862	BOOT:	1007	BOOT:
863	{ /* {} necessary for stoopid perl-5.6.x */	1008	{
864	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1009	#ifdef USE_ITHREADS
865	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1010	MUTEX_INIT (&coro_mutex);
		1011	#endif
		1012	BOOT_PAGESIZE;
		1013
866	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1014	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
867		1015
868	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1016	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
869	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1017	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
870	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1018	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
871	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
872
873	if (!padlist_cache)
874	padlist_cache = newHV ();
875		1019
876	main_mainstack = PL_mainstack;	1020	main_mainstack = PL_mainstack;
877		1021
878	coroapi.ver = CORO_API_VERSION;	1022	coroapi.ver = CORO_API_VERSION;
879	coroapi.transfer = api_transfer;	1023	coroapi.transfer = api_transfer;
880	}
881		1024
882	Coro::State	1025	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
883	_newprocess(args)	1026	}
884	SV * args	1027
885	PROTOTYPE: $	1028	SV *
		1029	new (char *klass, ...)
886	CODE:	1030	CODE:
887	Coro__State coro;	1031	{
		1032	struct coro *coro;
		1033	HV *hv;
		1034	int i;
888		1035
889	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
890	croak ("Coro::State::_newprocess expects an arrayref");
891
892	New (0, coro, 1, struct coro);	1036	Newz (0, coro, 1, struct coro);
		1037	coro->args = newAV ();
893		1038
894	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1039	hv = newHV ();
895	coro->mainstack = 0; /* actual work is done inside transfer */	1040	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
896	coro->stack = 0;	1041	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
897		1042
898	RETVAL = coro;	1043	for (i = 1; i < items; i++)
		1044	av_push (coro->args, newSVsv (ST (i)));
		1045	}
899	OUTPUT:	1046	OUTPUT:
900	RETVAL	1047	RETVAL
901		1048
902	void	1049	void
903	transfer(prev, next, flags)	1050	_set_stacklevel (...)
904	Coro::State_or_hashref prev	1051	ALIAS:
905	Coro::State_or_hashref next	1052	Coro::State::transfer = 1
906	int flags	1053	Coro::schedule = 2
907	PROTOTYPE: @	1054	Coro::cede = 3
		1055	Coro::Cont::yield = 4
908	CODE:	1056	CODE:
909	PUTBACK;	1057	{
910	transfer (aTHX_ prev, next, flags);	1058	struct transfer_args ta;
911	SPAGAIN;	1059
		1060	switch (ix)
		1061	{
		1062	case 0:
		1063	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1064	ta.next = 0;
		1065	ta.flags = TRANSFER_SET_STACKLEVEL;
		1066	break;
		1067
		1068	case 1:
		1069	if (items != 3)
		1070	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1071
		1072	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1073	break;
		1074
		1075	case 2:
		1076	prepare_schedule (&ta);
		1077	break;
		1078
		1079	case 3:
		1080	prepare_cede (&ta);
		1081	break;
		1082
		1083	case 4:
		1084	{
		1085	SV *yieldstack;
		1086	SV *sv;
		1087	AV *defav = GvAV (PL_defgv);
		1088
		1089	yieldstack = *hv_fetch (
		1090	(HV *)SvRV (GvSV (coro_current)),
		1091	"yieldstack", sizeof ("yieldstack") - 1,
		1092	0
		1093	);
		1094
		1095	/* set up @_ -- ugly */
		1096	av_clear (defav);
		1097	av_fill (defav, items - 1);
		1098	while (items--)
		1099	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1100
		1101	sv = av_pop ((AV *)SvRV (yieldstack));
		1102	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1103	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1104	ta.flags = 0;
		1105	SvREFCNT_dec (sv);
		1106	}
		1107	break;
		1108
		1109	}
		1110
		1111	TRANSFER (ta);
		1112	}
912		1113
913	void	1114	void
914	DESTROY(coro)	1115	_clone_state_from (SV *dst, SV *src)
915	Coro::State coro	1116	CODE:
916	CODE:	1117	{
		1118	struct coro *coro_src = SvSTATE (src);
917		1119
918	if (coro->mainstack && coro->mainstack != main_mainstack)	1120	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
919	{
920	struct coro temp;
921		1121
922	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1122	++coro_src->refcnt;
923	LOAD(aTHX_ coro);	1123	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
924		1124	}
925	destroy_stacks (aTHX);
926
927	LOAD((&temp)); /* this will get rid of defsv etc.. */
928
929	coro->mainstack = 0;
930	}
931
932	deallocate_stack (coro);
933
934	Safefree (coro);
935		1125
936	void	1126	void
937	flush()
938	CODE:
939	#ifdef MAY_FLUSH
940	flush_padlist_cache ();
941	#endif
942
943	void
944	_exit(code)	1127	_exit (code)
945	int code	1128	int code
946	PROTOTYPE: $	1129	PROTOTYPE: $
947	CODE:	1130	CODE:
948	#if defined(__GLIBC__) || _POSIX_C_SOURCE
949	_exit (code);	1131	_exit (code);
950	#else
951	signal (SIGTERM, SIG_DFL);
952	raise (SIGTERM);
953	exit (code);
954	#endif
955		1132
956	MODULE = Coro::State PACKAGE = Coro::Cont	1133	int
		1134	cctx_count ()
		1135	CODE:
		1136	RETVAL = cctx_count;
		1137	OUTPUT:
		1138	RETVAL
957		1139
958	# this is slightly dirty (should expose a c-level api)	1140	int
959		1141	cctx_idle ()
960	void	1142	CODE:
961	yield(...)	1143	RETVAL = cctx_idle;
962	PROTOTYPE: @	1144	OUTPUT:
963	CODE:	1145	RETVAL
964	static SV *returnstk;
965	SV *sv;
966	AV *defav = GvAV (PL_defgv);
967	struct coro *prev, *next;
968
969	if (!returnstk)
970	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
971
972	/* set up @_ -- ugly */
973	av_clear (defav);
974	av_fill (defav, items - 1);
975	while (items--)
976	av_store (defav, items, SvREFCNT_inc (ST(items)));
977
978	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
979	sv = av_pop ((AV *)SvRV (returnstk));
980	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
981	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
982	SvREFCNT_dec (sv);
983
984	transfer(aTHX_ prev, next, 0);
985		1146
986	MODULE = Coro::State PACKAGE = Coro	1147	MODULE = Coro::State PACKAGE = Coro
987		1148
988	# this is slightly dirty (should expose a c-level api)
989
990	BOOT:	1149	BOOT:
991	{	1150	{
992	int i;	1151	int i;
		1152
993	HV *stash = gv_stashpv ("Coro", TRUE);	1153	coro_stash = gv_stashpv ("Coro", TRUE);
994		1154
995	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1155	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
996	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1156	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
997	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1157	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
998	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1158	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
999	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1159	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1000	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1160	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1001		1161
1002	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1162	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1003	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1163	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1004		1164
1005	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1165	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1007		1167
1008	{	1168	{
1009	SV *sv = perl_get_sv("Coro::API", 1);	1169	SV *sv = perl_get_sv("Coro::API", 1);
1010		1170
1011	coroapi.schedule = api_schedule;	1171	coroapi.schedule = api_schedule;
		1172	coroapi.cede = api_cede;
1012	coroapi.ready = api_ready;	1173	coroapi.ready = api_ready;
		1174	coroapi.is_ready = api_is_ready;
1013	coroapi.nready = &coro_nready;	1175	coroapi.nready = &coro_nready;
1014	coroapi.current = coro_current;	1176	coroapi.current = coro_current;
1015		1177
1016	GCoroAPI = &coroapi;	1178	GCoroAPI = &coroapi;
1017	sv_setiv(sv, (IV)&coroapi);	1179	sv_setiv (sv, (IV)&coroapi);
1018	SvREADONLY_on(sv);	1180	SvREADONLY_on (sv);
1019	}	1181	}
1020	}	1182	}
1021		1183
1022	void	1184	int
		1185	prio (Coro::State coro, int newprio = 0)
		1186	ALIAS:
		1187	nice = 1
		1188	CODE:
		1189	{
		1190	RETVAL = coro->prio;
		1191
		1192	if (items > 1)
		1193	{
		1194	if (ix)
		1195	newprio += coro->prio;
		1196
		1197	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1198	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1199
		1200	coro->prio = newprio;
		1201	}
		1202	}
		1203
		1204	SV *
1023	ready(self)	1205	ready (SV *self)
1024	SV * self	1206	PROTOTYPE: $
1025	CODE:	1207	CODE:
1026	api_ready (self);	1208	RETVAL = boolSV (api_ready (self));
		1209	OUTPUT:
		1210	RETVAL
		1211
		1212	SV *
		1213	is_ready (SV *self)
		1214	PROTOTYPE: $
		1215	CODE:
		1216	RETVAL = boolSV (api_is_ready (self));
		1217	OUTPUT:
		1218	RETVAL
1027		1219
1028	int	1220	int
1029	nready(...)	1221	nready (...)
1030	PROTOTYPE:	1222	PROTOTYPE:
1031	CODE:	1223	CODE:
1032	RETVAL = coro_nready;	1224	RETVAL = coro_nready;
1033	OUTPUT:	1225	OUTPUT:
1034	RETVAL	1226	RETVAL
1035		1227
		1228	MODULE = Coro::State PACKAGE = Coro::AIO
		1229
		1230	SV *
		1231	_get_state ()
		1232	CODE:
		1233	{
		1234	struct {
		1235	int errorno;
		1236	int laststype;
		1237	int laststatval;
		1238	Stat_t statcache;
		1239	} data;
		1240
		1241	data.errorno = errno;
		1242	data.laststype = PL_laststype;
		1243	data.laststatval = PL_laststatval;
		1244	data.statcache = PL_statcache;
		1245
		1246	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1247	}
		1248	OUTPUT:
		1249	RETVAL
		1250
1036	void	1251	void
1037	schedule(...)	1252	_set_state (char *data_)
1038	PROTOTYPE:	1253	PROTOTYPE: $
1039	ALIAS:
1040	cede = 1
1041	CODE:	1254	CODE:
1042	api_schedule (ix);	1255	{
		1256	struct {
		1257	int errorno;
		1258	int laststype;
		1259	int laststatval;
		1260	Stat_t statcache;
		1261	} *data = (void *)data_;
1043		1262
		1263	errno = data->errorno;
		1264	PL_laststype = data->laststype;
		1265	PL_laststatval = data->laststatval;
		1266	PL_statcache = data->statcache;
		1267	}

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