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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.37 by root, Tue Oct 9 00:39:11 2001 UTC vs.
Revision 1.113 by root, Thu Nov 30 20:54:24 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	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 */
51	struct coro {	137	struct coro {
52	/* the optional C context */	138	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	139	coro_cctx *cctx;
54	void *cursp;	140
		141	/* data associated with this coroutine (initial args) */
		142	AV *args;
55	int gencnt;	143	int refcnt;
		144	int flags;
56		145
57	/* optionally saved, might be zero */	146	/* optionally saved, might be zero */
58	AV *defav;	147	AV *defav;
59	SV *defsv;	148	SV *defsv;
60	SV *errsv;	149	SV *errsv;
61		150
62	/* saved global state not related to stacks */	151	#define VAR(name,type) type name;
63	U8 dowarn;	152	# include "state.h"
64	I32 in_eval;	153	#undef VAR
65		154
66	/* the stacks and related info (callchain etc..) */	155	/* coro process data */
67	PERL_SI *curstackinfo;	156	int prio;
68	AV *curstack;
69	AV *mainstack;
70	SV **stack_sp;
71	OP *op;
72	SV **curpad;
73	SV **stack_base;
74	SV **stack_max;
75	SV **tmps_stack;
76	I32 tmps_floor;
77	I32 tmps_ix;
78	I32 tmps_max;
79	I32 *markstack;
80	I32 *markstack_ptr;
81	I32 *markstack_max;
82	I32 *scopestack;
83	I32 scopestack_ix;
84	I32 scopestack_max;
85	ANY *savestack;
86	I32 savestack_ix;
87	I32 savestack_max;
88	OP **retstack;
89	I32 retstack_ix;
90	I32 retstack_max;
91	COP *curcop;
92	JMPENV *top_env;
93
94	/* data associated with this coroutine (initial args) */
95	AV *args;
96	};	157	};
97		158
98	typedef struct coro *Coro__State;	159	typedef struct coro *Coro__State;
99	typedef struct coro *Coro__State_or_hashref;	160	typedef struct coro *Coro__State_or_hashref;
100		161
101	static AV *main_mainstack; /* used to differentiate between $main and others */	162	static AV *
102	static HV *coro_state_stash;	163	coro_clone_padlist (CV *cv)
103	static SV *ucoro_state_sv;
104	static U32 ucoro_state_hash;
105	static HV *padlist_cache;
106
107	/* mostly copied from op.c:cv_clone2 */
108	STATIC AV *
109	clone_padlist (AV *protopadlist)
110	{	164	{
111	AV *av;	165	AV *padlist = CvPADLIST (cv);
112	I32 ix;
113	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
114	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
115	SV **pname = AvARRAY (protopad_name);
116	SV **ppad = AvARRAY (protopad);
117	I32 fname = AvFILLp (protopad_name);
118	I32 fpad = AvFILLp (protopad);
119	AV *newpadlist, *newpad_name, *newpad;	166	AV *newpadlist, *newpad;
120	SV **npad;
121
122	newpad_name = newAV ();
123	for (ix = fname; ix >= 0; ix--)
124	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
125
126	newpad = newAV ();
127	av_fill (newpad, AvFILLp (protopad));
128	npad = AvARRAY (newpad);
129		167
130	newpadlist = newAV ();	168	newpadlist = newAV ();
131	AvREAL_off (newpadlist);	169	AvREAL_off (newpadlist);
132	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)));
133	av_store (newpadlist, 1, (SV *) newpad);	179	av_store (newpadlist, 1, (SV *)newpad);
134		180
135	av = newAV (); /* will be @_ */	181	return newpadlist;
136	av_extend (av, 0);	182	}
137	av_store (newpad, 0, (SV *) av);
138	AvFLAGS (av) = AVf_REIFY;
139		183
140	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))
141	{	189	{
142	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	190	I32 i = AvFILLp (padlist);
143	if (namesv && namesv != &PL_sv_undef)	191	while (i >= 0)
144	{	192	{
145	char *name = SvPVX (namesv); /* XXX */	193	SV **svp = av_fetch (padlist, i--, FALSE);
146	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	194	if (svp)
147	{ /* lexical from outside? */
148	npad[ix] = SvREFCNT_inc (ppad[ix]);
149	}	195	{
150	else
151	{ /* our own lexical */
152	SV *sv;	196	SV *sv;
153	if (*name == '&')	197	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
154	sv = SvREFCNT_inc (ppad[ix]);	198	SvREFCNT_dec (sv);
155	else if (*name == '@')	199
156	sv = (SV *) newAV ();	200	SvREFCNT_dec (*svp);
157	else if (*name == '%')
158	sv = (SV *) newHV ();
159	else
160	sv = NEWSV (0, 0);
161	if (!SvPADBUSY (sv))
162	SvPADMY_on (sv);
163	npad[ix] = sv;
164	}	201	}
165	}	202	}
166	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	203
167	{	204	SvREFCNT_dec ((SV*)padlist);
168	npad[ix] = SvREFCNT_inc (ppad[ix]);
169	}
170	else
171	{
172	SV *sv = NEWSV (0, 0);
173	SvPADTMP_on (sv);
174	npad[ix] = sv;
175	}
176	}	205	}
		206	}
177		207
178	#if 0 /* return -ENOTUNDERSTOOD */	208	static int
179	/* 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;
180		213
181	for (ix = fpad; ix > 0; ix--) {	214	/* casting is fun. */
182	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
183	if (namesv	216	free_padlist (padlist);
184	&& namesv != &PL_sv_undef	217
185	&& !(SvFLAGS(namesv) & SVf_FAKE)	218	SvREFCNT_dec (av);
186	&& *SvPVX(namesv) == '&'	219
187	&& CvCLONE(ppad[ix]))	220	return 0;
188	{	221	}
189	CV *kid = cv_clone((CV*)ppad[ix]);	222
190	SvREFCNT_dec(ppad[ix]);	223	#define PERL_MAGIC_coro PERL_MAGIC_ext
191	CvCLONE_on(kid);	224
192	SvPADMY_on(kid);	225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
193	npad[ix] = (SV*)kid;	226
194	}	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 ();
195	}	269	}
196	#endif
197		270
198	return newpadlist;	271	av = (AV *)mg->mg_obj;
199	}
200		272
201	#ifdef MAY_FLUSH	273	if (AvFILLp (av) >= AvMAX (av))
202	STATIC void	274	av_extend (av, AvMAX (av) + 1);
203	free_padlist (AV *padlist)
204	{
205	/* may be during global destruction */
206	if (SvREFCNT(padlist))
207	{
208	I32 i = AvFILLp(padlist);
209	while (i >= 0)
210	{
211	SV **svp = av_fetch(padlist, i--, FALSE);
212	SV *sv = svp ? *svp : Nullsv;
213	if (sv)
214	SvREFCNT_dec(sv);
215	}
216		275
217	SvREFCNT_dec((SV*)padlist);	276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
218	}
219	}	277	}
220	#endif
221
222	/* the next two functions merely cache the padlists */
223	STATIC void
224	get_padlist (CV *cv)
225	{
226	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
227
228	if (he && AvFILLp ((AV *)*he) >= 0)
229	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
230	else
231	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
232	}
233
234	STATIC void
235	put_padlist (CV *cv)
236	{
237	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
238
239	if (SvTYPE (*he) != SVt_PVAV)
240	{
241	SvREFCNT_dec (*he);
242	*he = (SV *)newAV ();
243	}
244
245	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
246	}
247
248	#ifdef MAY_FLUSH
249	STATIC void
250	flush_padlist_cache ()
251	{
252	HV *hv = padlist_cache;
253	padlist_cache = newHV ();
254
255	if (hv_iterinit (hv))
256	{
257	HE *he;
258	AV *padlist;
259
260	while (!!(he = hv_iternext (hv)))
261	{
262	AV *av = (AV *)HeVAL(he);
263
264	/* casting is fun. */
265	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
266	free_padlist (padlist);
267	}
268	}
269
270	SvREFCNT_dec (hv);
271	}
272	#endif
273		278
274	#define SB do {	279	#define SB do {
275	#define SE } while (0)	280	#define SE } while (0)
276		281
277	#define LOAD(state) load_state(aTHX_ (state));	282	#define LOAD(state) load_state((state));
278	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	283	#define SAVE(state,flags) save_state((state),(flags));
279		284
280	#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
281		286
282	static void	287	static void
283	load_state(pTHX_ Coro__State c)	288	load_state(Coro__State c)
284	{	289	{
285	PL_dowarn = c->dowarn;	290	#define VAR(name,type) PL_ ## name = c->name;
286	PL_in_eval = c->in_eval;	291	# include "state.h"
287		292	#undef VAR
288	PL_curstackinfo = c->curstackinfo;
289	PL_curstack = c->curstack;
290	PL_mainstack = c->mainstack;
291	PL_stack_sp = c->stack_sp;
292	PL_op = c->op;
293	PL_curpad = c->curpad;
294	PL_stack_base = c->stack_base;
295	PL_stack_max = c->stack_max;
296	PL_tmps_stack = c->tmps_stack;
297	PL_tmps_floor = c->tmps_floor;
298	PL_tmps_ix = c->tmps_ix;
299	PL_tmps_max = c->tmps_max;
300	PL_markstack = c->markstack;
301	PL_markstack_ptr = c->markstack_ptr;
302	PL_markstack_max = c->markstack_max;
303	PL_scopestack = c->scopestack;
304	PL_scopestack_ix = c->scopestack_ix;
305	PL_scopestack_max = c->scopestack_max;
306	PL_savestack = c->savestack;
307	PL_savestack_ix = c->savestack_ix;
308	PL_savestack_max = c->savestack_max;
309	PL_retstack = c->retstack;
310	PL_retstack_ix = c->retstack_ix;
311	PL_retstack_max = c->retstack_max;
312	PL_curcop = c->curcop;
313	PL_top_env = c->top_env;
314		293
315	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
316	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
317	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
318		297
…		…
321	CV *cv;	300	CV *cv;
322		301
323	/* now do the ugly restore mess */	302	/* now do the ugly restore mess */
324	while ((cv = (CV *)POPs))	303	while ((cv = (CV *)POPs))
325	{	304	{
326	AV *padlist = (AV *)POPs;
327
328	if (padlist)
329	{
330	put_padlist (cv); /* mark this padlist as available */	305	put_padlist (cv); /* mark this padlist as available */
331	CvPADLIST(cv) = padlist;	306	CvDEPTH (cv) = PTR2IV (POPs);
332	#ifdef USE_THREADS	307	CvPADLIST (cv) = (AV *)POPs;
333	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
334	#endif
335	}
336
337	++CvDEPTH(cv);
338	}	308	}
339		309
340	PUTBACK;	310	PUTBACK;
341	}	311	}
342	}	312	}
343		313
344	static void	314	static void
345	save_state(pTHX_ Coro__State c, int flags)	315	save_state(Coro__State c, int flags)
346	{	316	{
347	{	317	{
348	dSP;	318	dSP;
349	I32 cxix = cxstack_ix;	319	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	320	PERL_CONTEXT *ccstk = cxstack;
…		…
364	PERL_CONTEXT *cx = &ccstk[cxix--];	334	PERL_CONTEXT *cx = &ccstk[cxix--];
365		335
366	if (CxTYPE(cx) == CXt_SUB)	336	if (CxTYPE(cx) == CXt_SUB)
367	{	337	{
368	CV *cv = cx->blk_sub.cv;	338	CV *cv = cx->blk_sub.cv;
		339
369	if (CvDEPTH(cv))	340	if (CvDEPTH (cv))
370	{	341	{
371	#ifdef USE_THREADS
372	/*XPUSHs ((SV *)CvOWNER(cv));*/
373	/*CvOWNER(cv) = 0;*/
374	/*error must unlock this cv etc.. etc...*/
375	#endif
376	EXTEND (SP, CvDEPTH(cv)*2);	342	EXTEND (SP, 3);
377
378	while (--CvDEPTH(cv))
379	{
380	/* this tells the restore code to increment CvDEPTH */
381	PUSHs (Nullsv);
382	PUSHs ((SV *)cv);
383	}
384		343
385	PUSHs ((SV *)CvPADLIST(cv));	344	PUSHs ((SV *)CvPADLIST(cv));
		345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
386	PUSHs ((SV *)cv);	346	PUSHs ((SV *)cv);
387		347
		348	CvDEPTH (cv) = 0;
388	get_padlist (cv); /* this is a monster */	349	get_padlist (cv);
389	}	350	}
390	}	351	}
		352	#ifdef CXt_FORMAT
391	else if (CxTYPE(cx) == CXt_FORMAT)	353	else if (CxTYPE(cx) == CXt_FORMAT)
392	{	354	{
393	/* 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? */
394	/* my bold guess is as a simple, plain sub... */	356	/* my bold guess is as a simple, plain sub... */
395	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");
396	}	358	}
		359	#endif
397	}	360	}
398		361
399	if (top_si->si_type == PERLSI_MAIN)	362	if (top_si->si_type == PERLSI_MAIN)
400	break;	363	break;
401		364
…		…
409		372
410	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;
411	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
412	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
413		376
414	c->dowarn = PL_dowarn;	377	#define VAR(name,type)c->name = PL_ ## name;
415	c->in_eval = PL_in_eval;	378	# include "state.h"
416		379	#undef VAR
417	c->curstackinfo = PL_curstackinfo;
418	c->curstack = PL_curstack;
419	c->mainstack = PL_mainstack;
420	c->stack_sp = PL_stack_sp;
421	c->op = PL_op;
422	c->curpad = PL_curpad;
423	c->stack_base = PL_stack_base;
424	c->stack_max = PL_stack_max;
425	c->tmps_stack = PL_tmps_stack;
426	c->tmps_floor = PL_tmps_floor;
427	c->tmps_ix = PL_tmps_ix;
428	c->tmps_max = PL_tmps_max;
429	c->markstack = PL_markstack;
430	c->markstack_ptr = PL_markstack_ptr;
431	c->markstack_max = PL_markstack_max;
432	c->scopestack = PL_scopestack;
433	c->scopestack_ix = PL_scopestack_ix;
434	c->scopestack_max = PL_scopestack_max;
435	c->savestack = PL_savestack;
436	c->savestack_ix = PL_savestack_ix;
437	c->savestack_max = PL_savestack_max;
438	c->retstack = PL_retstack;
439	c->retstack_ix = PL_retstack_ix;
440	c->retstack_max = PL_retstack_max;
441	c->curcop = PL_curcop;
442	c->top_env = PL_top_env;
443	}	380	}
444		381
445	/*	382	/*
446	* allocate various perl stacks. This is an exact copy	383	* allocate various perl stacks. This is an exact copy
447	* of perl.c:init_stacks, except that it uses less memory	384	* of perl.c:init_stacks, except that it uses less memory
448	* on the assumption that coroutines do not usually need	385	* on the (sometimes correct) assumption that coroutines do
449	* a lot of stackspace.	386	* not usually need a lot of stackspace.
450	*/	387	*/
451	STATIC void	388	static void
452	coro_init_stacks (pTHX)	389	coro_init_stacks ()
453	{	390	{
454	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
455	PL_curstackinfo->si_type = PERLSI_MAIN;	392	PL_curstackinfo->si_type = PERLSI_MAIN;
456	PL_curstack = PL_curstackinfo->si_stack;	393	PL_curstack = PL_curstackinfo->si_stack;
457	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
467		404
468	New(54,PL_markstack,16,I32);	405	New(54,PL_markstack,16,I32);
469	PL_markstack_ptr = PL_markstack;	406	PL_markstack_ptr = PL_markstack;
470	PL_markstack_max = PL_markstack + 16;	407	PL_markstack_max = PL_markstack + 16;
471		408
		409	#ifdef SET_MARK_OFFSET
472	SET_MARK_OFFSET;	410	SET_MARK_OFFSET;
		411	#endif
473		412
474	New(54,PL_scopestack,16,I32);	413	New(54,PL_scopestack,16,I32);
475	PL_scopestack_ix = 0;	414	PL_scopestack_ix = 0;
476	PL_scopestack_max = 16;	415	PL_scopestack_max = 16;
477		416
478	New(54,PL_savestack,96,ANY);	417	New(54,PL_savestack,96,ANY);
479	PL_savestack_ix = 0;	418	PL_savestack_ix = 0;
480	PL_savestack_max = 96;	419	PL_savestack_max = 96;
481		420
		421	#if !PERL_VERSION_ATLEAST (5,9,0)
482	New(54,PL_retstack,8,OP*);	422	New(54,PL_retstack,8,OP*);
483	PL_retstack_ix = 0;	423	PL_retstack_ix = 0;
484	PL_retstack_max = 8;	424	PL_retstack_max = 8;
		425	#endif
485	}	426	}
486		427
487	/*	428	/*
488	* destroy the stacks, the callchain etc...	429	* destroy the stacks, the callchain etc...
489	* still there is a memleak of 128 bytes...
490	*/	430	*/
491	STATIC void	431	static void
492	destroy_stacks(pTHX)	432	coro_destroy_stacks ()
493	{	433	{
494	if (!IN_DESTRUCT)	434	if (!IN_DESTRUCT)
495	{	435	{
496	/* is this ugly, I ask? */	436	/* is this ugly, I ask? */
497	while (PL_scopestack_ix)	437	LEAVE_SCOPE (0);
498	LEAVE;
499		438
500	/* sure it is, but more important: is it correct?? :/ */	439	/* sure it is, but more important: is it correct?? :/ */
501	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
502	FREETMPS;	440	FREETMPS;
		441
		442	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
503	}	443	}
504		444
505	while (PL_curstackinfo->si_next)	445	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	446	PL_curstackinfo = PL_curstackinfo->si_next;
507		447
508	while (PL_curstackinfo)	448	while (PL_curstackinfo)
509	{	449	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	450	PERL_SI *p = PL_curstackinfo->si_prev;
511		451
512	{	452	{ /*D*//*remove*/
513	dSP;	453	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	454	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */	455	PUTBACK; /* possibly superfluous */
516	}	456	}
517		457
518	if (!IN_DESTRUCT)	458	if (!IN_DESTRUCT)
519	{	459	{
520	dounwind(-1);	460	dounwind (-1);/*D*//*remove*/
521	SvREFCNT_dec(PL_curstackinfo->si_stack);	461	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}	462	}
523		463
524	Safefree(PL_curstackinfo->si_cxstack);	464	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree(PL_curstackinfo);	465	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	466	PL_curstackinfo = p;
527	}	467	}
528		468
529	Safefree(PL_tmps_stack);	469	Safefree (PL_tmps_stack);
530	Safefree(PL_markstack);	470	Safefree (PL_markstack);
531	Safefree(PL_scopestack);	471	Safefree (PL_scopestack);
532	Safefree(PL_savestack);	472	Safefree (PL_savestack);
		473	#if !PERL_VERSION_ATLEAST (5,9,0)
533	Safefree(PL_retstack);	474	Safefree (PL_retstack);
534	}
535
536	static void
537	allocate_stack (Coro__State ctx, int alloc)
538	{
539	coro_stack *stack;
540
541	New (0, stack, 1, coro_stack);
542
543	stack->refcnt = 1;
544	stack->usecnt = 1;
545	stack->gencnt = ctx->gencnt = 0;
546	if (alloc)
547	{
548	#if HAVE_MMAP
549	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
551	if (stack->sptr == (void *)-1)
552	#endif	475	#endif
553	{
554	/*FIXME*//*D*//* reasonable stack size! */
555	stack->ssize = -4096 * sizeof (long);
556	New (0, stack->sptr, 4096, long);
557	}
558	}
559	else
560	stack->sptr = 0;
561
562	ctx->stack = stack;
563	}	476	}
564		477
565	static void	478	static void
566	deallocate_stack (Coro__State ctx)	479	setup_coro (struct coro *coro)
567	{
568	coro_stack *stack = ctx->stack;
569
570	ctx->stack = 0;
571
572	if (stack)
573	{
574	if (!--stack->refcnt)
575	{
576	#ifdef HAVE_MMAP
577	if (stack->ssize > 0 && stack->sptr)
578	munmap (stack->sptr, stack->ssize);
579	else
580	#else
581	Safefree (stack->sptr);
582	#endif
583	Safefree (stack);
584	}
585	else if (ctx->gencnt == stack->gencnt)
586	--stack->usecnt;
587	}
588	}
589
590	static void
591	setup_coro (void *arg)
592	{	480	{
593	/*	481	/*
594	* emulate part of the perl startup here.	482	* emulate part of the perl startup here.
595	*/	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	{
596	dSP;	530	dSP;
597	Coro__State ctx = (Coro__State)arg;	531	LOGOP myop;
598	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
599		532
600	coro_init_stacks (aTHX);	533	Zero (&myop, 1, LOGOP);
601	/*PL_curcop = 0;*/	534	myop.op_next = PL_op;
602	/*PL_in_eval = PL_in_eval;*/ /* inherit */	535	myop.op_flags = OPf_WANT_VOID;
603	SvREFCNT_dec (GvAV (PL_defgv));
604	GvAV (PL_defgv) = ctx->args;
605		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);
606	SPAGAIN;	543	SPAGAIN;
607
608	if (ctx->stack)
609	{
610	ctx->cursp = 0;
611
612	PUSHMARK(SP);
613	PUTBACK;
614	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
615
616	if (SvTRUE (ERRSV))
617	croak (NULL);
618	else
619	croak ("FATAL: CCTXT coroutine returned!");
620	}
621	else
622	{
623	UNOP myop;
624
625	PL_op = (OP *)&myop;
626
627	Zero(&myop, 1, UNOP);
628	myop.op_next = Nullop;
629	myop.op_flags = OPf_WANT_VOID;
630
631	PUSHMARK(SP);
632	XPUSHs (sub_init);
633	/*
634	* the next line is slightly wrong, as PL_op->op_next
635	* is actually being executed so we skip the first op.
636	* that doesn't matter, though, since it is only
637	* pp_nextstate and we never return...
638	* ah yes, and I don't care anyways ;)
639	*/
640	PUTBACK;
641	PL_op = pp_entersub();
642	SPAGAIN;
643
644	ENTER; /* necessary e.g. for dounwind */
645	}
646	}	544	}
647		545
648	static void	546	static void
649	continue_coro (void *arg)	547	coro_run (void *arg)
650	{	548	{
		549	/* coro_run is the alternative epilogue of transfer() */
		550	UNLOCK;
		551
651	/*	552	/*
652	* this is a _very_ stripped down perl interpreter ;)	553	* this is a _very_ stripped down perl interpreter ;)
653	*/	554	*/
654	Coro__State ctx = (Coro__State)arg;
655	JMPENV coro_start_env;
656
657	/* same as JMPENV_BOOTSTRAP */
658	Zero(&coro_start_env, 1, JMPENV);
659	coro_start_env.je_ret = -1;
660	coro_start_env.je_mustcatch = TRUE;
661	PL_top_env = &coro_start_env;	555	PL_top_env = &PL_start_env;
662		556
663	ctx->cursp = 0;	557	/* inject call to cctx_init */
664	PL_op = PL_op->op_next;	558	prepare_cctx ((coro_cctx *)arg);
665	CALLRUNOPS(aTHX);
666		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);
667	abort ();	564	abort ();
668	}	565	}
669		566
670	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
671	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	668	transfer (struct coro *prev, struct coro *next, int flags)
672	{	669	{
673	dSTACKLEVEL;	670	dSTACKLEVEL;
674	static struct coro *xnext;
675		671
		672	/* sometimes transfer is only called to set idle_sp */
		673	if (flags == TRANSFER_SET_STACKLEVEL)
		674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
676	if (prev != next)	675	else if (prev != next)
677	{	676	{
678	xnext = next;	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;
679		697
680	if (next->mainstack)	698	if (next->mainstack)
681	{	699	{
		700	/* coroutine already started */
682	SAVE (prev, flags);	701	SAVE (prev, flags);
683	LOAD (next);	702	LOAD (next);
684
685	/* mark this state as in-use */
686	next->mainstack = 0;
687	next->tmps_ix = -2;
688
689	/* stacklevel changed? if yes, grab the stack for us! */
690	if (flags & TRANSFER_SAVE_CCTXT)
691	{
692	if (!prev->stack)
693	allocate_stack (prev, 0);
694	else if (prev->cursp != stacklevel
695	&& prev->stack->usecnt > 1)
696	{
697	prev->gencnt = ++prev->stack->gencnt;
698	prev->stack->usecnt = 1;
699	}
700
701	/* has our stack been invalidated? */
702	if (next->stack && next->stack->gencnt != next->gencnt)
703	{
704	deallocate_stack (next);
705	allocate_stack (next, 1);
706	coro_create (&(next->stack->cctx),
707	continue_coro, (void *)next,
708	next->stack->sptr, labs (next->stack->ssize));
709	}
710
711	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712	/* don't add any code here */
713	}
714
715	}	703	}
716	else if (next->tmps_ix == -2)
717	croak ("tried to transfer to running coroutine");
718	else	704	else
719	{	705	{
		706	/* need to start coroutine */
720	SAVE (prev, -1); /* first get rid of the old state */	707	/* first get rid of the old state */
721		708	SAVE (prev, -1);
722	if (flags & TRANSFER_SAVE_CCTXT)	709	/* setup coroutine call */
723	{
724	if (!prev->stack)
725	allocate_stack (prev, 0);
726
727	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
728	{
729	setup_coro (next);
730
731	prev->stack->refcnt++;
732	prev->stack->usecnt++;
733	next->stack = prev->stack;
734	next->gencnt = prev->gencnt;
735	}
736	else
737	{
738	allocate_stack (next, 1);
739	coro_create (&(next->stack->cctx),
740	setup_coro, (void *)next,
741	next->stack->sptr, labs (next->stack->ssize));
742	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743	/* don't add any code here */
744	}
745	}
746	else
747	setup_coro (next);	710	setup_coro (next);
		711	/* need a new stack */
		712	assert (!next->stack);
748	}	713	}
749		714
750	/*	715	prev__cctx = prev->cctx;
751	* xnext is now either prev or next, depending on wether	716
752	* we switched the c stack or not. that's why i use a global	717	/* possibly "free" the cctx */
753	* variable, that should become thread-specific at one point.	718	if (prev__cctx->idle_sp == STACKLEVEL)
754	*/	719	{
755	xnext->cursp = stacklevel;	720	assert (PL_top_env == prev__cctx->top_env);
		721
		722	cctx_put (prev__cctx);
		723	prev->cctx = 0;
		724	}
		725	else if (prev__cctx->idle_sp) //D
		726	fprintf (stderr, "coro %p has own stack %p-%p\n", prev__cctx, prev__cctx->idle_sp, STACKLEVEL);//D
		727
		728	if (!next->cctx)
		729	next->cctx = cctx_get ();
		730
		731	if (prev__cctx != next->cctx)
		732	{
		733	assert ( prev__cctx->inuse);
		734	assert (!next->cctx->inuse);
		735
		736	prev__cctx->inuse = 0;
		737	next->cctx->inuse = 1;
		738
		739	prev__cctx->top_env = PL_top_env;
		740	PL_top_env = next->cctx->top_env;
		741	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		742	}
		743
		744	free_coro_mortal ();
		745
		746	UNLOCK;
756	}	747	}
757	}	748	}
758		749
		750	struct transfer_args
		751	{
		752	struct coro *prev, *next;
		753	int flags;
		754	};
		755
		756	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		757
		758	static void
		759	coro_state_destroy (struct coro *coro)
		760	{
		761	if (coro->refcnt--)
		762	return;
		763
		764	if (coro->flags & CF_RUNNING)
		765	croak ("FATAL: tried to destroy currently running coroutine");
		766
		767	if (coro->mainstack && coro->mainstack != main_mainstack)
		768	{
		769	struct coro temp;
		770
		771	SAVE ((&temp), TRANSFER_SAVE_ALL);
		772	LOAD (coro);
		773
		774	coro_destroy_stacks ();
		775
		776	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		777
		778	coro->mainstack = 0;
		779	}
		780
		781	cctx_free (coro->cctx);
		782	SvREFCNT_dec (coro->args);
		783	Safefree (coro);
		784	}
		785
		786	static int
		787	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		788	{
		789	struct coro *coro = (struct coro *)mg->mg_ptr;
		790	mg->mg_ptr = 0;
		791
		792	coro_state_destroy (coro);
		793
		794	return 0;
		795	}
		796
		797	static int
		798	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		799	{
		800	struct coro *coro = (struct coro *)mg->mg_ptr;
		801
		802	++coro->refcnt;
		803
		804	return 0;
		805	}
		806
		807	static MGVTBL coro_state_vtbl = {
		808	0, 0, 0, 0,
		809	coro_state_clear,
		810	0,
		811	#ifdef MGf_DUP
		812	coro_state_dup,
		813	#else
		814	# define MGf_DUP 0
		815	#endif
		816	};
		817
759	static struct coro *	818	static struct coro *
760	sv_to_coro (SV *arg, const char *funcname, const char *varname)	819	SvSTATE (SV *coro)
761	{	820	{
762	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	821	HV *stash;
		822	MAGIC *mg;
		823
		824	if (SvROK (coro))
		825	coro = SvRV (coro);
		826
		827	stash = SvSTASH (coro);
		828	if (stash != coro_stash && stash != coro_state_stash)
763	{	829	{
764	HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);	830	/* very slow, but rare, check */
765		831	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
766	if (!he)	832	croak ("Coro::State object required");
767	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
768
769	arg = HeVAL(he);
770	}	833	}
771
772	/* must also be changed inside Coro::Cont::yield */
773	if (SvROK(arg) && SvOBJECT(SvRV(arg))
774	&& SvSTASH(SvRV(arg)) == coro_state_stash)
775	return (struct coro *) SvIV((SV*)SvRV(arg));
776		834
777	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	835	mg = SvMAGIC (coro);
778	/*NORETURN*/	836	assert (mg->mg_type == PERL_MAGIC_ext);
		837	return (struct coro *)mg->mg_ptr;
779	}	838	}
780		839
781	static void	840	static void
		841	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		842	{
		843	ta->prev = SvSTATE (prev);
		844	ta->next = SvSTATE (next);
		845	ta->flags = flags;
		846	}
		847
		848	static void
782	api_transfer(pTHX_ SV *prev, SV *next, int flags)	849	api_transfer (SV *prev, SV *next, int flags)
783	{	850	{
784	transfer(aTHX_	851	dTHX;
785	sv_to_coro (prev, "Coro::transfer", "prev"),	852	struct transfer_args ta;
786	sv_to_coro (next, "Coro::transfer", "next"),	853
787	flags);	854	prepare_transfer (&ta, prev, next, flags);
		855	TRANSFER (ta);
788	}	856	}
789		857
790	/** Coro ********************************************************************/	858	/** Coro ********************************************************************/
791		859
792	#define PRIO_MAX 3	860	#define PRIO_MAX 3
…		…
796	#define PRIO_IDLE -3	864	#define PRIO_IDLE -3
797	#define PRIO_MIN -4	865	#define PRIO_MIN -4
798		866
799	/* for Coro.pm */	867	/* for Coro.pm */
800	static GV *coro_current, *coro_idle;	868	static GV *coro_current, *coro_idle;
801	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	869	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
802	static int coro_nready;	870	static int coro_nready;
803		871
804	static void	872	static void
805	coro_enq (SV *sv)	873	coro_enq (SV *coro_sv)
806	{	874	{
807	if (SvROK (sv))	875	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
808	{
809	SV *hv = SvRV (sv);
810	if (SvTYPE (hv) == SVt_PVHV)
811	{
812	SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0);
813	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
814
815	prio = prio > PRIO_MAX ? PRIO_MAX
816	: prio < PRIO_MIN ? PRIO_MIN
817	: prio;
818
819	av_push (coro_ready [prio - PRIO_MIN], sv);
820	coro_nready++;	876	coro_nready++;
821
822	return;
823	}
824	}
825
826	croak ("Coro::ready tried to enqueue something that is not a coroutine");
827	}	877	}
828		878
829	static SV *	879	static SV *
830	coro_deq (int min_prio)	880	coro_deq (int min_prio)
831	{	881	{
…		…
834	min_prio -= PRIO_MIN;	884	min_prio -= PRIO_MIN;
835	if (min_prio < 0)	885	if (min_prio < 0)
836	min_prio = 0;	886	min_prio = 0;
837		887
838	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	888	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
839	if (av_len (coro_ready[prio]) >= 0)	889	if (AvFILLp (coro_ready [prio]) >= 0)
840	{	890	{
841	coro_nready--;	891	coro_nready--;
842	return av_shift (coro_ready[prio]);	892	return av_shift (coro_ready [prio]);
843	}	893	}
844		894
845	return 0;	895	return 0;
846	}	896	}
847		897
848	static void	898	static int
849	api_ready (SV *coro)	899	api_ready (SV *coro_sv)
850	{	900	{
		901	struct coro *coro;
		902
		903	if (SvROK (coro_sv))
		904	coro_sv = SvRV (coro_sv);
		905
		906	coro = SvSTATE (coro_sv);
		907
		908	if (coro->flags & CF_READY)
		909	return 0;
		910
		911	if (coro->flags & CF_RUNNING)
		912	croak ("Coro::ready called on currently running coroutine");
		913
		914	coro->flags |= CF_READY;
		915
		916	LOCK;
851	coro_enq (SvREFCNT_inc (coro));	917	coro_enq (SvREFCNT_inc (coro_sv));
852	}	918	UNLOCK;
853		919
		920	return 1;
		921	}
		922
854	static void	923	static int
855	api_schedule (int cede)	924	api_is_ready (SV *coro_sv)
856	{	925	{
		926	return !!SvSTATE (coro_sv)->flags & CF_READY;
		927	}
		928
		929	static void
		930	prepare_schedule (struct transfer_args *ta)
		931	{
857	SV *prev, *next;	932	SV *current, *prev, *next;
858		933
859	prev = GvSV (coro_current);	934	current = GvSV (coro_current);
860		935
861	if (cede)	936	for (;;)
862	coro_enq (SvREFCNT_inc (prev));	937	{
863		938	LOCK;
864	next = coro_deq (PRIO_MIN);	939	next = coro_deq (PRIO_MIN);
		940	UNLOCK;
865		941
866	if (!next)	942	if (next)
867	next = SvREFCNT_inc (GvSV (coro_idle));	943	break;
868		944
869	GvSV (coro_current) = SvREFCNT_inc (next);	945	{
870	transfer (aTHX_	946	dSP;
871	sv_to_coro (prev, "Coro::schedule", "current coroutine"),	947
872	sv_to_coro (next, "Coro::schedule", "next coroutine"),	948	ENTER;
873	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);	949	SAVETMPS;
874	SvREFCNT_dec (next);	950
875	SvREFCNT_dec (prev);	951	PUSHMARK (SP);
		952	PUTBACK;
		953	call_sv (GvSV (coro_idle), G_DISCARD);
		954
		955	FREETMPS;
		956	LEAVE;
		957	}
		958	}
		959
		960	prev = SvRV (current);
		961	SvRV (current) = next;
		962
		963	/* free this only after the transfer */
		964	LOCK;
		965	free_coro_mortal ();
		966	UNLOCK;
		967	coro_mortal = prev;
		968
		969	ta->prev = SvSTATE (prev);
		970	ta->next = SvSTATE (next);
		971	ta->flags = TRANSFER_SAVE_ALL;
		972
		973	ta->next->flags &= ~CF_READY;
		974	}
		975
		976	static void
		977	prepare_cede (struct transfer_args *ta)
		978	{
		979	api_ready (GvSV (coro_current));
		980
		981	prepare_schedule (ta);
		982	}
		983
		984	static void
		985	api_schedule (void)
		986	{
		987	dTHX;
		988	struct transfer_args ta;
		989
		990	prepare_schedule (&ta);
		991	TRANSFER (ta);
		992	}
		993
		994	static void
		995	api_cede (void)
		996	{
		997	dTHX;
		998	struct transfer_args ta;
		999
		1000	prepare_cede (&ta);
		1001	TRANSFER (ta);
876	}	1002	}
877		1003
878	MODULE = Coro::State PACKAGE = Coro::State	1004	MODULE = Coro::State PACKAGE = Coro::State
879		1005
880	PROTOTYPES: ENABLE	1006	PROTOTYPES: DISABLE
881		1007
882	BOOT:	1008	BOOT:
883	{ /* {} necessary for stoopid perl-5.6.x */	1009	{
884	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1010	#ifdef USE_ITHREADS
885	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1011	MUTEX_INIT (&coro_mutex);
		1012	#endif
		1013	BOOT_PAGESIZE;
		1014
886	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1015	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887		1016
888	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1017	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
889	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1018	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
890	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1019	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
891	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
892
893	if (!padlist_cache)
894	padlist_cache = newHV ();
895		1020
896	main_mainstack = PL_mainstack;	1021	main_mainstack = PL_mainstack;
897		1022
898	coroapi.ver = CORO_API_VERSION;	1023	coroapi.ver = CORO_API_VERSION;
899	coroapi.transfer = api_transfer;	1024	coroapi.transfer = api_transfer;
900	}
901		1025
902	Coro::State	1026	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
903	_newprocess(args)	1027	}
904	SV * args	1028
905	PROTOTYPE: $	1029	SV *
		1030	new (char *klass, ...)
906	CODE:	1031	CODE:
907	Coro__State coro;	1032	{
		1033	struct coro *coro;
		1034	HV *hv;
		1035	int i;
908		1036
909	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
910	croak ("Coro::State::_newprocess expects an arrayref");
911
912	New (0, coro, 1, struct coro);	1037	Newz (0, coro, 1, struct coro);
		1038	coro->args = newAV ();
913		1039
914	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1040	hv = newHV ();
915	coro->mainstack = 0; /* actual work is done inside transfer */	1041	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
916	coro->stack = 0;	1042	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
917		1043
918	RETVAL = coro;	1044	for (i = 1; i < items; i++)
		1045	av_push (coro->args, newSVsv (ST (i)));
		1046	}
919	OUTPUT:	1047	OUTPUT:
920	RETVAL	1048	RETVAL
921		1049
922	void	1050	void
923	transfer(prev, next, flags)	1051	_set_stacklevel (...)
924	Coro::State_or_hashref prev	1052	ALIAS:
925	Coro::State_or_hashref next	1053	Coro::State::transfer = 1
926	int flags	1054	Coro::schedule = 2
927	PROTOTYPE: @	1055	Coro::cede = 3
		1056	Coro::Cont::yield = 4
928	CODE:	1057	CODE:
929	PUTBACK;	1058	{
930	transfer (aTHX_ prev, next, flags);	1059	struct transfer_args ta;
931	SPAGAIN;	1060
		1061	switch (ix)
		1062	{
		1063	case 0:
		1064	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1065	ta.next = 0;
		1066	ta.flags = TRANSFER_SET_STACKLEVEL;
		1067	break;
		1068
		1069	case 1:
		1070	if (items != 3)
		1071	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1072
		1073	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1074	break;
		1075
		1076	case 2:
		1077	prepare_schedule (&ta);
		1078	break;
		1079
		1080	case 3:
		1081	prepare_cede (&ta);
		1082	break;
		1083
		1084	case 4:
		1085	{
		1086	SV *yieldstack;
		1087	SV *sv;
		1088	AV *defav = GvAV (PL_defgv);
		1089
		1090	yieldstack = *hv_fetch (
		1091	(HV *)SvRV (GvSV (coro_current)),
		1092	"yieldstack", sizeof ("yieldstack") - 1,
		1093	0
		1094	);
		1095
		1096	/* set up @_ -- ugly */
		1097	av_clear (defav);
		1098	av_fill (defav, items - 1);
		1099	while (items--)
		1100	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1101
		1102	sv = av_pop ((AV *)SvRV (yieldstack));
		1103	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1104	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1105	ta.flags = 0;
		1106	SvREFCNT_dec (sv);
		1107	}
		1108	break;
		1109
		1110	}
		1111
		1112	TRANSFER (ta);
		1113	}
932		1114
933	void	1115	void
934	DESTROY(coro)	1116	_clone_state_from (SV *dst, SV *src)
935	Coro::State coro	1117	CODE:
936	CODE:	1118	{
		1119	struct coro *coro_src = SvSTATE (src);
937		1120
938	if (coro->mainstack && coro->mainstack != main_mainstack)	1121	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
939	{
940	struct coro temp;
941		1122
942	PUTBACK;	1123	++coro_src->refcnt;
943	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1124	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
944	LOAD(aTHX_ coro);	1125	}
945	SPAGAIN;
946
947	destroy_stacks (aTHX);
948
949	LOAD((&temp)); /* this will get rid of defsv etc.. */
950	SPAGAIN;
951
952	coro->mainstack = 0;
953	}
954
955	deallocate_stack (coro);
956
957	Safefree (coro);
958		1126
959	void	1127	void
960	flush()
961	CODE:
962	#ifdef MAY_FLUSH
963	flush_padlist_cache ();
964	#endif
965
966	void
967	_exit(code)	1128	_exit (code)
968	int code	1129	int code
969	PROTOTYPE: $	1130	PROTOTYPE: $
970	CODE:	1131	CODE:
971	#if defined(__GLIBC__) || _POSIX_C_SOURCE
972	_exit (code);	1132	_exit (code);
973	#else
974	signal (SIGTERM, SIG_DFL);
975	raise (SIGTERM);
976	exit (code);
977	#endif
978		1133
979	MODULE = Coro::State PACKAGE = Coro::Cont	1134	int
		1135	cctx_count ()
		1136	CODE:
		1137	RETVAL = cctx_count;
		1138	OUTPUT:
		1139	RETVAL
980		1140
981	# this is slightly dirty (should expose a c-level api)	1141	int
982		1142	cctx_idle ()
983	void	1143	CODE:
984	yield(...)	1144	RETVAL = cctx_idle;
985	PROTOTYPE: @	1145	OUTPUT:
986	CODE:	1146	RETVAL
987	static SV *returnstk;
988	SV *sv;
989	AV *defav = GvAV (PL_defgv);
990	struct coro *prev, *next;
991
992	if (!returnstk)
993	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
994
995	/* set up @_ -- ugly */
996	av_clear (defav);
997	av_fill (defav, items - 1);
998	while (items--)
999	av_store (defav, items, SvREFCNT_inc (ST(items)));
1000
1001	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1002	sv = av_pop ((AV *)SvRV (returnstk));
1003	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1004	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1005	SvREFCNT_dec (sv);
1006
1007	transfer(aTHX_ prev, next, 0);
1008		1147
1009	MODULE = Coro::State PACKAGE = Coro	1148	MODULE = Coro::State PACKAGE = Coro
1010		1149
1011	# this is slightly dirty (should expose a c-level api)
1012
1013	BOOT:	1150	BOOT:
1014	{	1151	{
1015	int i;	1152	int i;
		1153
1016	HV *stash = gv_stashpv ("Coro", TRUE);	1154	coro_stash = gv_stashpv ("Coro", TRUE);
1017		1155
1018	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1156	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1157	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1158	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1159	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1160	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1161	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1024		1162
1025	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1163	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1026	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1164	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1027		1165
1028	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1166	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1030		1168
1031	{	1169	{
1032	SV *sv = perl_get_sv("Coro::API", 1);	1170	SV *sv = perl_get_sv("Coro::API", 1);
1033		1171
1034	coroapi.schedule = api_schedule;	1172	coroapi.schedule = api_schedule;
		1173	coroapi.cede = api_cede;
1035	coroapi.ready = api_ready;	1174	coroapi.ready = api_ready;
		1175	coroapi.is_ready = api_is_ready;
1036	coroapi.nready = &coro_nready;	1176	coroapi.nready = &coro_nready;
1037	coroapi.current = coro_current;	1177	coroapi.current = coro_current;
1038		1178
1039	GCoroAPI = &coroapi;	1179	GCoroAPI = &coroapi;
1040	sv_setiv(sv, (IV)&coroapi);	1180	sv_setiv (sv, (IV)&coroapi);
1041	SvREADONLY_on(sv);	1181	SvREADONLY_on (sv);
1042	}	1182	}
1043	}	1183	}
1044		1184
1045	void	1185	int
		1186	prio (Coro::State coro, int newprio = 0)
		1187	ALIAS:
		1188	nice = 1
		1189	CODE:
		1190	{
		1191	RETVAL = coro->prio;
		1192
		1193	if (items > 1)
		1194	{
		1195	if (ix)
		1196	newprio += coro->prio;
		1197
		1198	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1199	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1200
		1201	coro->prio = newprio;
		1202	}
		1203	}
		1204
		1205	SV *
1046	ready(self)	1206	ready (SV *self)
1047	SV * self
1048	PROTOTYPE: $	1207	PROTOTYPE: $
1049	CODE:	1208	CODE:
1050	api_ready (self);	1209	RETVAL = boolSV (api_ready (self));
		1210	OUTPUT:
		1211	RETVAL
		1212
		1213	SV *
		1214	is_ready (SV *self)
		1215	PROTOTYPE: $
		1216	CODE:
		1217	RETVAL = boolSV (api_is_ready (self));
		1218	OUTPUT:
		1219	RETVAL
1051		1220
1052	int	1221	int
1053	nready(...)	1222	nready (...)
1054	PROTOTYPE:	1223	PROTOTYPE:
1055	CODE:	1224	CODE:
1056	RETVAL = coro_nready;	1225	RETVAL = coro_nready;
1057	OUTPUT:	1226	OUTPUT:
1058	RETVAL	1227	RETVAL
1059		1228
		1229	MODULE = Coro::State PACKAGE = Coro::AIO
		1230
		1231	SV *
		1232	_get_state ()
		1233	CODE:
		1234	{
		1235	struct {
		1236	int errorno;
		1237	int laststype;
		1238	int laststatval;
		1239	Stat_t statcache;
		1240	} data;
		1241
		1242	data.errorno = errno;
		1243	data.laststype = PL_laststype;
		1244	data.laststatval = PL_laststatval;
		1245	data.statcache = PL_statcache;
		1246
		1247	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1248	}
		1249	OUTPUT:
		1250	RETVAL
		1251
1060	void	1252	void
1061	schedule(...)	1253	_set_state (char *data_)
1062	PROTOTYPE:	1254	PROTOTYPE: $
1063	ALIAS:
1064	cede = 1
1065	CODE:	1255	CODE:
1066	api_schedule (ix);	1256	{
		1257	struct {
		1258	int errorno;
		1259	int laststype;
		1260	int laststatval;
		1261	Stat_t statcache;
		1262	} *data = (void *)data_;
1067		1263
		1264	errno = data->errorno;
		1265	PL_laststype = data->laststype;
		1266	PL_laststatval = data->laststatval;
		1267	PL_statcache = data->statcache;
		1268	}

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