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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.36 by root, Fri Oct 5 14:20:10 2001 UTC vs.
Revision 1.106 by root, Mon Nov 27 02:08:55 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	/* this is a structure representing a c-level coroutine */
40	typedef struct {	109	typedef struct coro_cctx {
41	int refcnt; /* pointer reference counter */	110	struct coro_cctx *next;
42	int usecnt; /* shared by how many coroutines */
43	int gencnt; /* generation counter */
44		111
45	coro_context cctx;	112	/* the stack */
46
47	void *sptr;	113	void *sptr;
48	long ssize; /* positive == mmap, otherwise malloc */	114	long ssize; /* positive == mmap, otherwise malloc */
49	} coro_stack;
50		115
		116	/* cpu state */
		117	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		118	JMPENV *top_env;
		119	coro_context cctx;
		120
		121	#if USE_VALGRIND
		122	int valgrind_id;
		123	#endif
		124	} coro_cctx;
		125
		126	/* this is a structure representing a perl-level coroutine */
51	struct coro {	127	struct coro {
52	/* the optional C context */	128	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	129	coro_cctx *cctx;
54	void *cursp;	130
		131	/* data associated with this coroutine (initial args) */
		132	AV *args;
55	int gencnt;	133	int refcnt;
56		134
57	/* optionally saved, might be zero */	135	/* optionally saved, might be zero */
58	AV *defav;	136	AV *defav;
59	SV *defsv;	137	SV *defsv;
60	SV *errsv;	138	SV *errsv;
…		…
68	AV *curstack;	146	AV *curstack;
69	AV *mainstack;	147	AV *mainstack;
70	SV **stack_sp;	148	SV **stack_sp;
71	OP *op;	149	OP *op;
72	SV **curpad;	150	SV **curpad;
		151	AV *comppad;
		152	CV *compcv;
73	SV **stack_base;	153	SV **stack_base;
74	SV **stack_max;	154	SV **stack_max;
75	SV **tmps_stack;	155	SV **tmps_stack;
76	I32 tmps_floor;	156	I32 tmps_floor;
77	I32 tmps_ix;	157	I32 tmps_ix;
…		…
86	I32 savestack_ix;	166	I32 savestack_ix;
87	I32 savestack_max;	167	I32 savestack_max;
88	OP **retstack;	168	OP **retstack;
89	I32 retstack_ix;	169	I32 retstack_ix;
90	I32 retstack_max;	170	I32 retstack_max;
		171	PMOP *curpm;
91	COP *curcop;	172	COP *curcop;
92	JMPENV *top_env;
93		173
94	/* data associated with this coroutine (initial args) */	174	/* coro process data */
95	AV *args;	175	int prio;
96	};	176	};
97		177
98	typedef struct coro *Coro__State;	178	typedef struct coro *Coro__State;
99	typedef struct coro *Coro__State_or_hashref;	179	typedef struct coro *Coro__State_or_hashref;
100		180
101	static AV *main_mainstack; /* used to differentiate between $main and others */	181	static AV *
102	static HV *coro_state_stash;	182	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	{	183	{
111	AV *av;	184	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;	185	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		186
130	newpadlist = newAV ();	187	newpadlist = newAV ();
131	AvREAL_off (newpadlist);	188	AvREAL_off (newpadlist);
132	av_store (newpadlist, 0, (SV *) newpad_name);	189	#if PERL_VERSION_ATLEAST (5,9,0)
		190	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		191	#else
		192	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		193	#endif
		194	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		195	--AvFILLp (padlist);
		196
		197	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
133	av_store (newpadlist, 1, (SV *) newpad);	198	av_store (newpadlist, 1, (SV *)newpad);
134		199
135	av = newAV (); /* will be @_ */	200	return newpadlist;
136	av_extend (av, 0);	201	}
137	av_store (newpad, 0, (SV *) av);
138	AvFLAGS (av) = AVf_REIFY;
139		202
140	for (ix = fpad; ix > 0; ix--)	203	static void
		204	free_padlist (AV *padlist)
		205	{
		206	/* may be during global destruction */
		207	if (SvREFCNT (padlist))
141	{	208	{
142	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	209	I32 i = AvFILLp (padlist);
143	if (namesv && namesv != &PL_sv_undef)	210	while (i >= 0)
144	{	211	{
145	char *name = SvPVX (namesv); /* XXX */	212	SV **svp = av_fetch (padlist, i--, FALSE);
146	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	213	if (svp)
147	{ /* lexical from outside? */
148	npad[ix] = SvREFCNT_inc (ppad[ix]);
149	}	214	{
150	else
151	{ /* our own lexical */
152	SV *sv;	215	SV *sv;
153	if (*name == '&')	216	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
154	sv = SvREFCNT_inc (ppad[ix]);	217	SvREFCNT_dec (sv);
155	else if (*name == '@')	218
156	sv = (SV *) newAV ();	219	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	}	220	}
165	}	221	}
166	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	222
167	{	223	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	}	224	}
		225	}
177		226
178	#if 0 /* return -ENOTUNDERSTOOD */	227	static int
179	/* Now that vars are all in place, clone nested closures. */	228	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		229	{
		230	AV *padlist;
		231	AV *av = (AV *)mg->mg_obj;
180		232
181	for (ix = fpad; ix > 0; ix--) {	233	/* casting is fun. */
182	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	234	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
183	if (namesv	235	free_padlist (padlist);
184	&& namesv != &PL_sv_undef	236
185	&& !(SvFLAGS(namesv) & SVf_FAKE)	237	SvREFCNT_dec (av);
186	&& *SvPVX(namesv) == '&'	238
187	&& CvCLONE(ppad[ix]))	239	return 0;
188	{	240	}
189	CV *kid = cv_clone((CV*)ppad[ix]);	241
190	SvREFCNT_dec(ppad[ix]);	242	#define PERL_MAGIC_coro PERL_MAGIC_ext
191	CvCLONE_on(kid);	243
192	SvPADMY_on(kid);	244	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
193	npad[ix] = (SV*)kid;	245
194	}	246	/* the next two functions merely cache the padlists */
		247	static void
		248	get_padlist (CV *cv)
		249	{
		250	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		251
		252	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
		253	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
		254	else
		255	{
		256	#if 0
		257	/* this is probably cleaner, but also slower? */
		258	CV *cp = Perl_cv_clone (cv);
		259	CvPADLIST (cv) = CvPADLIST (cp);
		260	CvPADLIST (cp) = 0;
		261	SvREFCNT_dec (cp);
		262	#else
		263	CvPADLIST (cv) = coro_clone_padlist (cv);
		264	#endif
		265	}
		266	}
		267
		268	static void
		269	put_padlist (CV *cv)
		270	{
		271	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		272
		273	if (!mg)
		274	{
		275	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		276	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		277	mg->mg_virtual = &vtbl_coro;
		278	mg->mg_obj = (SV *)newAV ();
195	}	279	}
196	#endif
197		280
198	return newpadlist;
199	}
200
201	#ifdef MAY_FLUSH
202	STATIC void
203	free_padlist (AV *padlist)
204	{
205	/* may be during global destruction */
206	if (SvREFCNT(padlist))
207	{
208	I32 i = AvFILLp(padlist);
209	while (i >= 0)
210	{
211	SV **svp = av_fetch(padlist, i--, FALSE);
212	SV *sv = svp ? *svp : Nullsv;
213	if (sv)
214	SvREFCNT_dec(sv);
215	}
216
217	SvREFCNT_dec((SV*)padlist);
218	}
219	}
220	#endif
221
222	/* the next two functions merely cache the padlists */
223	STATIC void
224	get_padlist (CV *cv)
225	{
226	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
227
228	if (he && AvFILLp ((AV *)*he) >= 0)
229	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
230	else
231	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
232	}
233
234	STATIC void
235	put_padlist (CV *cv)
236	{
237	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
238
239	if (SvTYPE (*he) != SVt_PVAV)
240	{
241	SvREFCNT_dec (*he);
242	*he = (SV *)newAV ();
243	}
244
245	av_push ((AV *)*he, (SV *)CvPADLIST (cv));	281	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
246	}	282	}
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		283
274	#define SB do {	284	#define SB do {
275	#define SE } while (0)	285	#define SE } while (0)
276		286
277	#define LOAD(state) load_state(aTHX_ (state));	287	#define LOAD(state) load_state((state));
278	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	288	#define SAVE(state,flags) save_state((state),(flags));
279		289
280	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	290	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
281		291
282	static void	292	static void
283	load_state(pTHX_ Coro__State c)	293	load_state(Coro__State c)
284	{	294	{
285	PL_dowarn = c->dowarn;	295	PL_dowarn = c->dowarn;
286	PL_in_eval = c->in_eval;	296	PL_in_eval = c->in_eval;
287		297
288	PL_curstackinfo = c->curstackinfo;	298	PL_curstackinfo = c->curstackinfo;
289	PL_curstack = c->curstack;	299	PL_curstack = c->curstack;
290	PL_mainstack = c->mainstack;	300	PL_mainstack = c->mainstack;
291	PL_stack_sp = c->stack_sp;	301	PL_stack_sp = c->stack_sp;
292	PL_op = c->op;	302	PL_op = c->op;
293	PL_curpad = c->curpad;	303	PL_curpad = c->curpad;
		304	PL_comppad = c->comppad;
		305	PL_compcv = c->compcv;
294	PL_stack_base = c->stack_base;	306	PL_stack_base = c->stack_base;
295	PL_stack_max = c->stack_max;	307	PL_stack_max = c->stack_max;
296	PL_tmps_stack = c->tmps_stack;	308	PL_tmps_stack = c->tmps_stack;
297	PL_tmps_floor = c->tmps_floor;	309	PL_tmps_floor = c->tmps_floor;
298	PL_tmps_ix = c->tmps_ix;	310	PL_tmps_ix = c->tmps_ix;
…		…
304	PL_scopestack_ix = c->scopestack_ix;	316	PL_scopestack_ix = c->scopestack_ix;
305	PL_scopestack_max = c->scopestack_max;	317	PL_scopestack_max = c->scopestack_max;
306	PL_savestack = c->savestack;	318	PL_savestack = c->savestack;
307	PL_savestack_ix = c->savestack_ix;	319	PL_savestack_ix = c->savestack_ix;
308	PL_savestack_max = c->savestack_max;	320	PL_savestack_max = c->savestack_max;
		321	#if !PERL_VERSION_ATLEAST (5,9,0)
309	PL_retstack = c->retstack;	322	PL_retstack = c->retstack;
310	PL_retstack_ix = c->retstack_ix;	323	PL_retstack_ix = c->retstack_ix;
311	PL_retstack_max = c->retstack_max;	324	PL_retstack_max = c->retstack_max;
		325	#endif
		326	PL_curpm = c->curpm;
312	PL_curcop = c->curcop;	327	PL_curcop = c->curcop;
313	PL_top_env = c->top_env;
314		328
315	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	329	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
316	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	330	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
317	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	331	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
318		332
…		…
327		341
328	if (padlist)	342	if (padlist)
329	{	343	{
330	put_padlist (cv); /* mark this padlist as available */	344	put_padlist (cv); /* mark this padlist as available */
331	CvPADLIST(cv) = padlist;	345	CvPADLIST(cv) = padlist;
332	#ifdef USE_THREADS
333	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
334	#endif
335	}	346	}
336		347
337	++CvDEPTH(cv);	348	++CvDEPTH(cv);
338	}	349	}
339		350
340	PUTBACK;	351	PUTBACK;
341	}	352	}
342	}	353	}
343		354
344	static void	355	static void
345	save_state(pTHX_ Coro__State c, int flags)	356	save_state(Coro__State c, int flags)
346	{	357	{
347	{	358	{
348	dSP;	359	dSP;
349	I32 cxix = cxstack_ix;	360	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	361	PERL_CONTEXT *ccstk = cxstack;
…		…
366	if (CxTYPE(cx) == CXt_SUB)	377	if (CxTYPE(cx) == CXt_SUB)
367	{	378	{
368	CV *cv = cx->blk_sub.cv;	379	CV *cv = cx->blk_sub.cv;
369	if (CvDEPTH(cv))	380	if (CvDEPTH(cv))
370	{	381	{
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);	382	EXTEND (SP, CvDEPTH(cv)*2);
377		383
378	while (--CvDEPTH(cv))	384	while (--CvDEPTH(cv))
379	{	385	{
380	/* this tells the restore code to increment CvDEPTH */	386	/* this tells the restore code to increment CvDEPTH */
…		…
383	}	389	}
384		390
385	PUSHs ((SV *)CvPADLIST(cv));	391	PUSHs ((SV *)CvPADLIST(cv));
386	PUSHs ((SV *)cv);	392	PUSHs ((SV *)cv);
387		393
388	get_padlist (cv); /* this is a monster */	394	get_padlist (cv);
389	}	395	}
390	}	396	}
		397	#ifdef CXt_FORMAT
391	else if (CxTYPE(cx) == CXt_FORMAT)	398	else if (CxTYPE(cx) == CXt_FORMAT)
392	{	399	{
393	/* I never used formats, so how should I know how these are implemented? */	400	/* I never used formats, so how should I know how these are implemented? */
394	/* my bold guess is as a simple, plain sub... */	401	/* my bold guess is as a simple, plain sub... */
395	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	402	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
396	}	403	}
		404	#endif
397	}	405	}
398		406
399	if (top_si->si_type == PERLSI_MAIN)	407	if (top_si->si_type == PERLSI_MAIN)
400	break;	408	break;
401		409
…		…
418	c->curstack = PL_curstack;	426	c->curstack = PL_curstack;
419	c->mainstack = PL_mainstack;	427	c->mainstack = PL_mainstack;
420	c->stack_sp = PL_stack_sp;	428	c->stack_sp = PL_stack_sp;
421	c->op = PL_op;	429	c->op = PL_op;
422	c->curpad = PL_curpad;	430	c->curpad = PL_curpad;
		431	c->comppad = PL_comppad;
		432	c->compcv = PL_compcv;
423	c->stack_base = PL_stack_base;	433	c->stack_base = PL_stack_base;
424	c->stack_max = PL_stack_max;	434	c->stack_max = PL_stack_max;
425	c->tmps_stack = PL_tmps_stack;	435	c->tmps_stack = PL_tmps_stack;
426	c->tmps_floor = PL_tmps_floor;	436	c->tmps_floor = PL_tmps_floor;
427	c->tmps_ix = PL_tmps_ix;	437	c->tmps_ix = PL_tmps_ix;
…		…
433	c->scopestack_ix = PL_scopestack_ix;	443	c->scopestack_ix = PL_scopestack_ix;
434	c->scopestack_max = PL_scopestack_max;	444	c->scopestack_max = PL_scopestack_max;
435	c->savestack = PL_savestack;	445	c->savestack = PL_savestack;
436	c->savestack_ix = PL_savestack_ix;	446	c->savestack_ix = PL_savestack_ix;
437	c->savestack_max = PL_savestack_max;	447	c->savestack_max = PL_savestack_max;
		448	#if !PERL_VERSION_ATLEAST (5,9,0)
438	c->retstack = PL_retstack;	449	c->retstack = PL_retstack;
439	c->retstack_ix = PL_retstack_ix;	450	c->retstack_ix = PL_retstack_ix;
440	c->retstack_max = PL_retstack_max;	451	c->retstack_max = PL_retstack_max;
		452	#endif
		453	c->curpm = PL_curpm;
441	c->curcop = PL_curcop;	454	c->curcop = PL_curcop;
442	c->top_env = PL_top_env;
443	}	455	}
444		456
445	/*	457	/*
446	* allocate various perl stacks. This is an exact copy	458	* allocate various perl stacks. This is an exact copy
447	* of perl.c:init_stacks, except that it uses less memory	459	* of perl.c:init_stacks, except that it uses less memory
448	* on the assumption that coroutines do not usually need	460	* on the (sometimes correct) assumption that coroutines do
449	* a lot of stackspace.	461	* not usually need a lot of stackspace.
450	*/	462	*/
451	STATIC void	463	static void
452	coro_init_stacks (pTHX)	464	coro_init_stacks ()
453	{	465	{
454	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	466	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
455	PL_curstackinfo->si_type = PERLSI_MAIN;	467	PL_curstackinfo->si_type = PERLSI_MAIN;
456	PL_curstack = PL_curstackinfo->si_stack;	468	PL_curstack = PL_curstackinfo->si_stack;
457	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	469	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
467		479
468	New(54,PL_markstack,16,I32);	480	New(54,PL_markstack,16,I32);
469	PL_markstack_ptr = PL_markstack;	481	PL_markstack_ptr = PL_markstack;
470	PL_markstack_max = PL_markstack + 16;	482	PL_markstack_max = PL_markstack + 16;
471		483
		484	#ifdef SET_MARK_OFFSET
472	SET_MARK_OFFSET;	485	SET_MARK_OFFSET;
		486	#endif
473		487
474	New(54,PL_scopestack,16,I32);	488	New(54,PL_scopestack,16,I32);
475	PL_scopestack_ix = 0;	489	PL_scopestack_ix = 0;
476	PL_scopestack_max = 16;	490	PL_scopestack_max = 16;
477		491
478	New(54,PL_savestack,96,ANY);	492	New(54,PL_savestack,96,ANY);
479	PL_savestack_ix = 0;	493	PL_savestack_ix = 0;
480	PL_savestack_max = 96;	494	PL_savestack_max = 96;
481		495
		496	#if !PERL_VERSION_ATLEAST (5,9,0)
482	New(54,PL_retstack,8,OP*);	497	New(54,PL_retstack,8,OP*);
483	PL_retstack_ix = 0;	498	PL_retstack_ix = 0;
484	PL_retstack_max = 8;	499	PL_retstack_max = 8;
		500	#endif
485	}	501	}
486		502
487	/*	503	/*
488	* destroy the stacks, the callchain etc...	504	* destroy the stacks, the callchain etc...
489	* still there is a memleak of 128 bytes...
490	*/	505	*/
491	STATIC void	506	static void
492	destroy_stacks(pTHX)	507	coro_destroy_stacks ()
493	{	508	{
494	if (!IN_DESTRUCT)	509	if (!IN_DESTRUCT)
495	{	510	{
496	/* is this ugly, I ask? */	511	/* is this ugly, I ask? */
497	while (PL_scopestack_ix)	512	LEAVE_SCOPE (0);
498	LEAVE;
499		513
500	/* sure it is, but more important: is it correct?? :/ */	514	/* 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;	515	FREETMPS;
		516
		517	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
503	}	518	}
504		519
505	while (PL_curstackinfo->si_next)	520	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	521	PL_curstackinfo = PL_curstackinfo->si_next;
507		522
508	while (PL_curstackinfo)	523	while (PL_curstackinfo)
509	{	524	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	525	PERL_SI *p = PL_curstackinfo->si_prev;
511		526
512	{	527	{ /*D*//*remove*/
513	dSP;	528	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	529	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */	530	PUTBACK; /* possibly superfluous */
516	}	531	}
517		532
518	if (!IN_DESTRUCT)	533	if (!IN_DESTRUCT)
519	{	534	{
520	dounwind(-1);	535	dounwind (-1);/*D*//*remove*/
521	SvREFCNT_dec(PL_curstackinfo->si_stack);	536	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}	537	}
523		538
524	Safefree(PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree(PL_curstackinfo);	540	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	541	PL_curstackinfo = p;
527	}	542	}
528		543
529	Safefree(PL_tmps_stack);	544	Safefree (PL_tmps_stack);
530	Safefree(PL_markstack);	545	Safefree (PL_markstack);
531	Safefree(PL_scopestack);	546	Safefree (PL_scopestack);
532	Safefree(PL_savestack);	547	Safefree (PL_savestack);
		548	#if !PERL_VERSION_ATLEAST (5,9,0)
533	Safefree(PL_retstack);	549	Safefree (PL_retstack);
534	}
535
536	static void
537	allocate_stack (Coro__State ctx, int alloc)
538	{
539	coro_stack *stack;
540
541	New (0, stack, 1, coro_stack);
542
543	stack->refcnt = 1;
544	stack->usecnt = 1;
545	stack->gencnt = ctx->gencnt = 0;
546	if (alloc)
547	{
548	#ifdef HAVE_MMAP
549	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
551	if (stack->sptr == (void *)-1)
552	#endif	550	#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	}	551	}
564		552
565	static void	553	static void
566	deallocate_stack (Coro__State ctx)	554	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	{	555	{
593	/*	556	/*
594	* emulate part of the perl startup here.	557	* emulate part of the perl startup here.
595	*/	558	*/
		559
		560	coro_init_stacks ();
		561
		562	PL_curcop = 0;
		563	PL_in_eval = 0;
		564	PL_curpm = 0;
		565
		566	{
		567	dSP;
		568	LOGOP myop;
		569
		570	/* I have no idea why this is needed, but it is */
		571	PUSHMARK (SP);
		572
		573	SvREFCNT_dec (GvAV (PL_defgv));
		574	GvAV (PL_defgv) = coro->args; coro->args = 0;
		575
		576	Zero (&myop, 1, LOGOP);
		577	myop.op_next = Nullop;
		578	myop.op_flags = OPf_WANT_VOID;
		579
		580	PL_op = (OP *)&myop;
		581
		582	PUSHMARK (SP);
		583	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
		584	PUTBACK;
		585	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		586	SPAGAIN;
		587
		588	ENTER; /* necessary e.g. for dounwind */
		589	}
		590	}
		591
		592	static void
		593	free_coro_mortal ()
		594	{
		595	if (coro_mortal)
		596	{
		597	SvREFCNT_dec (coro_mortal);
		598	coro_mortal = 0;
		599	}
		600	}
		601
		602	static void NOINLINE
		603	prepare_cctx (coro_cctx *cctx)
		604	{
596	dSP;	605	dSP;
597	Coro__State ctx = (Coro__State)arg;	606	LOGOP myop;
598	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
599		607
600	coro_init_stacks (aTHX);	608	Zero (&myop, 1, LOGOP);
601	/*PL_curcop = 0;*/	609	myop.op_next = PL_op;
602	/*PL_in_eval = PL_in_eval;*/ /* inherit */	610	myop.op_flags = OPf_WANT_VOID;
603	SvREFCNT_dec (GvAV (PL_defgv));
604	GvAV (PL_defgv) = ctx->args;
605		611
		612	sv_setiv (get_sv ("Coro::State::cctx", FALSE), PTR2IV (cctx));
		613
		614	PUSHMARK (SP);
		615	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
		616	PUTBACK;
		617	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
606	SPAGAIN;	618	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	}	619	}
647		620
648	static void	621	static void
649	continue_coro (void *arg)	622	coro_run (void *arg)
650	{	623	{
		624	/* coro_run is the alternative epilogue of transfer() */
		625	UNLOCK;
		626
651	/*	627	/*
652	* this is a _very_ stripped down perl interpreter ;)	628	* this is a _very_ stripped down perl interpreter ;)
653	*/	629	*/
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;	630	PL_top_env = &PL_start_env;
		631	/* inject call to cctx_init */
		632	prepare_cctx ((coro_cctx *)arg);
662		633
663	ctx->cursp = 0;	634	/* somebody will hit me for both perl_run and PL_restartop */
664	PL_op = PL_op->op_next;	635	perl_run (PL_curinterp);
665	CALLRUNOPS(aTHX);
666		636
		637	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
667	abort ();	638	abort ();
668	}	639	}
669		640
670	STATIC void	641	static coro_cctx *
		642	cctx_new ()
		643	{
		644	coro_cctx *cctx;
		645
		646	New (0, cctx, 1, coro_cctx);
		647
		648	#if HAVE_MMAP
		649
		650	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		651	/* mmap suppsedly does allocate-on-write for us */
		652	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		653
		654	if (cctx->sptr == (void *)-1)
		655	{
		656	perror ("FATAL: unable to mmap stack for coroutine");
		657	_exit (EXIT_FAILURE);
		658	}
		659
		660	# if STACKGUARD
		661	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		662	# endif
		663
		664	#else
		665
		666	cctx->ssize = STACKSIZE * (long)sizeof (long);
		667	New (0, cctx->sptr, STACKSIZE, long);
		668
		669	if (!cctx->sptr)
		670	{
		671	perror ("FATAL: unable to malloc stack for coroutine");
		672	_exit (EXIT_FAILURE);
		673	}
		674
		675	#endif
		676
		677	#if USE_VALGRIND
		678	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		679	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		680	cctx->ssize + (char *)cctx->sptr
		681	);
		682	#endif
		683
		684	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		685
		686	return cctx;
		687	}
		688
		689	static void
		690	cctx_free (coro_cctx *cctx)
		691	{
		692	if (!cctx)
		693	return;
		694
		695	#if USE_VALGRIND
		696	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		697	#endif
		698
		699	#if HAVE_MMAP
		700	munmap (cctx->sptr, cctx->ssize);
		701	#else
		702	Safefree (cctx->sptr);
		703	#endif
		704
		705	Safefree (cctx);
		706	}
		707
		708	static coro_cctx *cctx_first;
		709	static int cctx_count, cctx_idle;
		710
		711	static coro_cctx *
		712	cctx_get ()
		713	{
		714	coro_cctx *cctx;
		715
		716	if (cctx_first)
		717	{
		718	--cctx_idle;
		719	cctx = cctx_first;
		720	cctx_first = cctx->next;
		721	}
		722	else
		723	{
		724	++cctx_count;
		725	cctx = cctx_new ();
		726	PL_op = PL_op->op_next;
		727	}
		728
		729	return cctx;
		730	}
		731
		732	static void
		733	cctx_put (coro_cctx *cctx)
		734	{
		735	++cctx_idle;
		736	cctx->next = cctx_first;
		737	cctx_first = cctx;
		738	}
		739
		740	/* never call directly, always through the coro_state_transfer global variable */
		741	static void NOINLINE
671	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	742	transfer (struct coro *prev, struct coro *next, int flags)
672	{	743	{
673	dSTACKLEVEL;	744	dSTACKLEVEL;
674	static struct coro *xnext;
675		745
		746	/* sometimes transfer is only called to set idle_sp */
		747	if (flags == TRANSFER_SET_STACKLEVEL)
		748	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
676	if (prev != next)	749	else if (prev != next)
677	{	750	{
678	xnext = next;	751	coro_cctx *prev__cctx;
		752
		753	LOCK;
679		754
680	if (next->mainstack)	755	if (next->mainstack)
681	{	756	{
		757	/* coroutine already started */
682	SAVE (prev, flags);	758	SAVE (prev, flags);
683	LOAD (next);	759	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	}	760	}
716	else if (next->tmps_ix == -2)
717	croak ("tried to transfer to running coroutine");
718	else	761	else
719	{	762	{
		763	/* need to start coroutine */
720	SAVE (prev, -1); /* first get rid of the old state */	764	/* first get rid of the old state */
721		765	SAVE (prev, -1);
722	if (flags & TRANSFER_SAVE_CCTXT)	766	/* 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);	767	setup_coro (next);
		768	/* need a stack */
		769	next->cctx = 0;
748	}	770	}
749		771
750	/*	772	if (!prev->cctx)
751	* xnext is now either prev or next, depending on wether	773	/* create a new empty context */
752	* we switched the c stack or not. that's why i use a global	774	Newz (0, prev->cctx, 1, coro_cctx);
753	* variable, that should become thread-specific at one point.	775
		776	prev__cctx = prev->cctx;
		777
		778	/* possibly "free" the cctx */
		779	if (prev__cctx->idle_sp == STACKLEVEL)
754	*/	780	{
755	xnext->cursp = stacklevel;	781	cctx_put (prev__cctx);
		782	prev->cctx = 0;
		783	}
		784
		785	if (!next->cctx)
		786	next->cctx = cctx_get ();
		787
		788	if (prev__cctx != next->cctx)
		789	{
		790	prev__cctx->top_env = PL_top_env;
		791	PL_top_env = next->cctx->top_env;
		792	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		793	}
		794
		795	free_coro_mortal ();
		796
		797	UNLOCK;
756	}	798	}
757	}	799	}
758		800
		801	struct transfer_args
		802	{
		803	struct coro *prev, *next;
		804	int flags;
		805	};
		806
		807	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		808
		809	static void
		810	coro_state_destroy (struct coro *coro)
		811	{
		812	if (coro->refcnt--)
		813	return;
		814
		815	if (coro->mainstack && coro->mainstack != main_mainstack)
		816	{
		817	struct coro temp;
		818
		819	SAVE ((&temp), TRANSFER_SAVE_ALL);
		820	LOAD (coro);
		821
		822	coro_destroy_stacks ();
		823
		824	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		825
		826	coro->mainstack = 0;
		827	}
		828
		829	cctx_free (coro->cctx);
		830	SvREFCNT_dec (coro->args);
		831	Safefree (coro);
		832	}
		833
		834	static int
		835	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		836	{
		837	struct coro *coro = (struct coro *)mg->mg_ptr;
		838	mg->mg_ptr = 0;
		839
		840	coro_state_destroy (coro);
		841
		842	return 0;
		843	}
		844
		845	static int
		846	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		847	{
		848	struct coro *coro = (struct coro *)mg->mg_ptr;
		849
		850	++coro->refcnt;
		851
		852	return 0;
		853	}
		854
		855	static MGVTBL coro_state_vtbl = {
		856	0, 0, 0, 0,
		857	coro_state_clear,
		858	0,
		859	#ifdef MGf_DUP
		860	coro_state_dup,
		861	#else
		862	# define MGf_DUP 0
		863	#endif
		864	};
		865
759	static struct coro *	866	static struct coro *
760	sv_to_coro (SV *arg, const char *funcname, const char *varname)	867	SvSTATE (SV *coro)
761	{	868	{
762	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	869	HV *stash;
		870	MAGIC *mg;
		871
		872	if (SvROK (coro))
		873	coro = SvRV (coro);
		874
		875	stash = SvSTASH (coro);
		876	if (stash != coro_stash && stash != coro_state_stash)
763	{	877	{
764	HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);	878	/* very slow, but rare, check */
765		879	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
766	if (!he)	880	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	}	881	}
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		882
777	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	883	mg = SvMAGIC (coro);
778	/*NORETURN*/	884	assert (mg->mg_type == PERL_MAGIC_ext);
		885	return (struct coro *)mg->mg_ptr;
779	}	886	}
780		887
781	static void	888	static void
		889	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		890	{
		891	ta->prev = SvSTATE (prev);
		892	ta->next = SvSTATE (next);
		893	ta->flags = flags;
		894	}
		895
		896	static void
782	api_transfer(pTHX_ SV *prev, SV *next, int flags)	897	api_transfer (SV *prev, SV *next, int flags)
783	{	898	{
784	transfer(aTHX_	899	dTHX;
785	sv_to_coro (prev, "Coro::transfer", "prev"),	900	struct transfer_args ta;
786	sv_to_coro (next, "Coro::transfer", "next"),	901
787	flags);	902	prepare_transfer (&ta, prev, next, flags);
		903	TRANSFER (ta);
788	}	904	}
789		905
790	/** Coro ********************************************************************/	906	/** Coro ********************************************************************/
791		907
792	#define PRIO_MAX 3	908	#define PRIO_MAX 3
…		…
796	#define PRIO_IDLE -3	912	#define PRIO_IDLE -3
797	#define PRIO_MIN -4	913	#define PRIO_MIN -4
798		914
799	/* for Coro.pm */	915	/* for Coro.pm */
800	static GV *coro_current, *coro_idle;	916	static GV *coro_current, *coro_idle;
801	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	917	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
802	static int coro_nready;	918	static int coro_nready;
803		919
804	static void	920	static void
805	coro_enq (SV *sv)	921	coro_enq (SV *sv)
806	{	922	{
807	if (SvROK (sv))	923	int prio;
808	{	924
809	SV *hv = SvRV (sv);
810	if (SvTYPE (hv) == SVt_PVHV)	925	if (SvTYPE (sv) != SVt_PVHV)
811	{
812	SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0);
813	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
814
815	prio = prio > PRIO_MAX ? PRIO_MAX
816	: prio < PRIO_MIN ? PRIO_MIN
817	: prio;
818
819	av_push (coro_ready [prio - PRIO_MIN], sv);
820	coro_nready++;
821
822	return;
823	}
824	}
825
826	croak ("Coro::ready tried to enqueue something that is not a coroutine");	926	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		927
		928	prio = SvSTATE (sv)->prio;
		929
		930	av_push (coro_ready [prio - PRIO_MIN], sv);
		931	coro_nready++;
827	}	932	}
828		933
829	static SV *	934	static SV *
830	coro_deq (int min_prio)	935	coro_deq (int min_prio)
831	{	936	{
…		…
834	min_prio -= PRIO_MIN;	939	min_prio -= PRIO_MIN;
835	if (min_prio < 0)	940	if (min_prio < 0)
836	min_prio = 0;	941	min_prio = 0;
837		942
838	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	943	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
839	if (av_len (coro_ready[prio]) >= 0)	944	if (AvFILLp (coro_ready [prio]) >= 0)
840	{	945	{
841	coro_nready--;	946	coro_nready--;
842	return av_shift (coro_ready[prio]);	947	return av_shift (coro_ready [prio]);
843	}	948	}
844		949
845	return 0;	950	return 0;
846	}	951	}
847		952
848	static void	953	static void
849	api_ready (SV *coro)	954	api_ready (SV *coro)
850	{	955	{
		956	dTHX;
		957
		958	if (SvROK (coro))
		959	coro = SvRV (coro);
		960
		961	LOCK;
851	coro_enq (SvREFCNT_inc (coro));	962	coro_enq (SvREFCNT_inc (coro));
		963	UNLOCK;
852	}	964	}
853		965
854	static void	966	static void
855	api_schedule (int cede)	967	prepare_schedule (struct transfer_args *ta)
856	{	968	{
857	SV *prev, *next;	969	SV *current, *prev, *next;
858		970
859	prev = GvSV (coro_current);	971	current = GvSV (coro_current);
860		972
861	if (cede)	973	for (;;)
862	coro_enq (SvREFCNT_inc (prev));	974	{
863		975	LOCK;
864	next = coro_deq (PRIO_MIN);	976	next = coro_deq (PRIO_MIN);
		977	UNLOCK;
865		978
866	if (!next)	979	if (next)
867	next = SvREFCNT_inc (GvSV (coro_idle));	980	break;
868		981
869	GvSV (coro_current) = SvREFCNT_inc (next);	982	{
870	transfer (aTHX_	983	dSP;
871	sv_to_coro (prev, "Coro::schedule", "current coroutine"),	984
872	sv_to_coro (next, "Coro::schedule", "next coroutine"),	985	ENTER;
873	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);	986	SAVETMPS;
874	SvREFCNT_dec (next);	987
875	SvREFCNT_dec (prev);	988	PUSHMARK (SP);
		989	PUTBACK;
		990	call_sv (GvSV (coro_idle), G_DISCARD);
		991
		992	FREETMPS;
		993	LEAVE;
		994	}
		995	}
		996
		997	prev = SvRV (current);
		998	SvRV (current) = next;
		999
		1000	/* free this only after the transfer */
		1001	LOCK;
		1002	free_coro_mortal ();
		1003	UNLOCK;
		1004	coro_mortal = prev;
		1005
		1006	ta->prev = SvSTATE (prev);
		1007	ta->next = SvSTATE (next);
		1008	ta->flags = TRANSFER_SAVE_ALL;
		1009	}
		1010
		1011	static void
		1012	prepare_cede (struct transfer_args *ta)
		1013	{
		1014	LOCK;
		1015	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		1016	UNLOCK;
		1017
		1018	prepare_schedule (ta);
		1019	}
		1020
		1021	static void
		1022	api_schedule (void)
		1023	{
		1024	dTHX;
		1025	struct transfer_args ta;
		1026
		1027	prepare_schedule (&ta);
		1028	TRANSFER (ta);
		1029	}
		1030
		1031	static void
		1032	api_cede (void)
		1033	{
		1034	dTHX;
		1035	struct transfer_args ta;
		1036
		1037	prepare_cede (&ta);
		1038	TRANSFER (ta);
876	}	1039	}
877		1040
878	MODULE = Coro::State PACKAGE = Coro::State	1041	MODULE = Coro::State PACKAGE = Coro::State
879		1042
880	PROTOTYPES: ENABLE	1043	PROTOTYPES: DISABLE
881		1044
882	BOOT:	1045	BOOT:
883	{ /* {} necessary for stoopid perl-5.6.x */	1046	{
884	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1047	#ifdef USE_ITHREADS
885	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1048	MUTEX_INIT (&coro_mutex);
		1049	#endif
		1050	BOOT_PAGESIZE;
		1051
886	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1052	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887		1053
888	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1054	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
889	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1055	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
890	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1056	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		1057
896	main_mainstack = PL_mainstack;	1058	main_mainstack = PL_mainstack;
897		1059
898	coroapi.ver = CORO_API_VERSION;	1060	coroapi.ver = CORO_API_VERSION;
899	coroapi.transfer = api_transfer;	1061	coroapi.transfer = api_transfer;
900	}
901		1062
902	Coro::State	1063	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
903	_newprocess(args)	1064	}
904	SV * args	1065
905	PROTOTYPE: $	1066	SV *
		1067	new (char *klass, ...)
906	CODE:	1068	CODE:
907	Coro__State coro;	1069	{
		1070	struct coro *coro;
		1071	HV *hv;
		1072	int i;
908		1073
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);	1074	Newz (0, coro, 1, struct coro);
		1075	coro->args = newAV ();
913		1076
914	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1077	hv = newHV ();
915	coro->mainstack = 0; /* actual work is done inside transfer */	1078	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
916	coro->stack = 0;	1079	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
917		1080
918	RETVAL = coro;	1081	for (i = 1; i < items; i++)
		1082	av_push (coro->args, newSVsv (ST (i)));
		1083	}
919	OUTPUT:	1084	OUTPUT:
920	RETVAL	1085	RETVAL
921		1086
922	void	1087	void
923	transfer(prev, next, flags)	1088	_set_stacklevel (...)
924	Coro::State_or_hashref prev	1089	ALIAS:
925	Coro::State_or_hashref next	1090	Coro::State::transfer = 1
926	int flags	1091	Coro::schedule = 2
927	PROTOTYPE: @	1092	Coro::cede = 3
		1093	Coro::Cont::yield = 4
928	CODE:	1094	CODE:
929	PUTBACK;	1095	{
930	transfer (aTHX_ prev, next, flags);	1096	struct transfer_args ta;
931	SPAGAIN;	1097
		1098	switch (ix)
		1099	{
		1100	case 0:
		1101	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1102	ta.next = 0;
		1103	ta.flags = TRANSFER_SET_STACKLEVEL;
		1104	break;
		1105
		1106	case 1:
		1107	if (items != 3)
		1108	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1109
		1110	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1111	break;
		1112
		1113	case 2:
		1114	prepare_schedule (&ta);
		1115	break;
		1116
		1117	case 3:
		1118	prepare_cede (&ta);
		1119	break;
		1120
		1121	case 4:
		1122	{
		1123	SV *yieldstack;
		1124	SV *sv;
		1125	AV *defav = GvAV (PL_defgv);
		1126
		1127	yieldstack = *hv_fetch (
		1128	(HV *)SvRV (GvSV (coro_current)),
		1129	"yieldstack", sizeof ("yieldstack") - 1,
		1130	0
		1131	);
		1132
		1133	/* set up @_ -- ugly */
		1134	av_clear (defav);
		1135	av_fill (defav, items - 1);
		1136	while (items--)
		1137	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1138
		1139	sv = av_pop ((AV *)SvRV (yieldstack));
		1140	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1141	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1142	ta.flags = 0;
		1143	SvREFCNT_dec (sv);
		1144	}
		1145	break;
		1146
		1147	}
		1148
		1149	TRANSFER (ta);
		1150	}
932		1151
933	void	1152	void
934	DESTROY(coro)	1153	_clone_state_from (SV *dst, SV *src)
935	Coro::State coro	1154	CODE:
936	CODE:	1155	{
		1156	struct coro *coro_src = SvSTATE (src);
937		1157
938	if (coro->mainstack && coro->mainstack != main_mainstack)	1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
939	{
940	struct coro temp;
941		1159
942	PUTBACK;	1160	++coro_src->refcnt;
943	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1161	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
944	LOAD(aTHX_ coro);	1162	}
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		1163
959	void	1164	void
960	flush()
961	CODE:
962	#ifdef MAY_FLUSH
963	flush_padlist_cache ();
964	#endif
965
966	void
967	_exit(code)	1165	_exit (code)
968	int code	1166	int code
969	PROTOTYPE: $	1167	PROTOTYPE: $
970	CODE:	1168	CODE:
971	#if defined(__GLIBC__) || _POSIX_C_SOURCE
972	_exit (code);	1169	_exit (code);
973	#else
974	signal (SIGTERM, SIG_DFL);
975	raise (SIGTERM);
976	exit (code);
977	#endif
978		1170
979	MODULE = Coro::State PACKAGE = Coro::Cont	1171	int
		1172	cctx_count ()
		1173	CODE:
		1174	RETVAL = cctx_count;
		1175	OUTPUT:
		1176	RETVAL
980		1177
981	# this is slightly dirty (should expose a c-level api)	1178	int
982		1179	cctx_idle ()
983	void	1180	CODE:
984	yield(...)	1181	RETVAL = cctx_idle;
985	PROTOTYPE: @	1182	OUTPUT:
986	CODE:	1183	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		1184
1009	MODULE = Coro::State PACKAGE = Coro	1185	MODULE = Coro::State PACKAGE = Coro
1010		1186
1011	# this is slightly dirty (should expose a c-level api)
1012
1013	BOOT:	1187	BOOT:
1014	{	1188	{
1015	int i;	1189	int i;
		1190
1016	HV *stash = gv_stashpv ("Coro", TRUE);	1191	coro_stash = gv_stashpv ("Coro", TRUE);
1017		1192
1018	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1193	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1194	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1195	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1196	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1197	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1198	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1024		1199
1025	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1200	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1026	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1201	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1027		1202
1028	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1203	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1030		1205
1031	{	1206	{
1032	SV *sv = perl_get_sv("Coro::API", 1);	1207	SV *sv = perl_get_sv("Coro::API", 1);
1033		1208
1034	coroapi.schedule = api_schedule;	1209	coroapi.schedule = api_schedule;
		1210	coroapi.cede = api_cede;
1035	coroapi.ready = api_ready;	1211	coroapi.ready = api_ready;
1036	coroapi.nready = &coro_nready;	1212	coroapi.nready = &coro_nready;
1037	coroapi.current = coro_current;	1213	coroapi.current = coro_current;
1038		1214
1039	GCoroAPI = &coroapi;	1215	GCoroAPI = &coroapi;
1040	sv_setiv(sv, (IV)&coroapi);	1216	sv_setiv (sv, (IV)&coroapi);
1041	SvREADONLY_on(sv);	1217	SvREADONLY_on (sv);
1042	}	1218	}
1043	}	1219	}
1044		1220
		1221	int
		1222	prio (Coro::State coro, int newprio = 0)
		1223	ALIAS:
		1224	nice = 1
		1225	CODE:
		1226	{
		1227	RETVAL = coro->prio;
		1228
		1229	if (items > 1)
		1230	{
		1231	if (ix)
		1232	newprio += coro->prio;
		1233
		1234	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1235	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1236
		1237	coro->prio = newprio;
		1238	}
		1239	}
		1240
1045	void	1241	void
1046	ready(self)	1242	ready (SV *self)
1047	SV * self
1048	PROTOTYPE: $	1243	PROTOTYPE: $
1049	CODE:	1244	CODE:
1050	api_ready (self);	1245	api_ready (self);
1051		1246
1052	int	1247	int
1053	nready(...)	1248	nready (...)
1054	PROTOTYPE:	1249	PROTOTYPE:
1055	CODE:	1250	CODE:
1056	RETVAL = coro_nready;	1251	RETVAL = coro_nready;
1057	OUTPUT:	1252	OUTPUT:
1058	RETVAL	1253	RETVAL
1059		1254
		1255	MODULE = Coro::State PACKAGE = Coro::AIO
		1256
		1257	SV *
		1258	_get_state ()
		1259	CODE:
		1260	{
		1261	struct {
		1262	int errorno;
		1263	int laststype;
		1264	int laststatval;
		1265	Stat_t statcache;
		1266	} data;
		1267
		1268	data.errorno = errno;
		1269	data.laststype = PL_laststype;
		1270	data.laststatval = PL_laststatval;
		1271	data.statcache = PL_statcache;
		1272
		1273	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1274	}
		1275	OUTPUT:
		1276	RETVAL
		1277
1060	void	1278	void
1061	schedule(...)	1279	_set_state (char *data_)
1062	PROTOTYPE:	1280	PROTOTYPE: $
1063	ALIAS:
1064	cede = 1
1065	CODE:	1281	CODE:
1066	api_schedule (ix);	1282	{
		1283	struct {
		1284	int errorno;
		1285	int laststype;
		1286	int laststatval;
		1287	Stat_t statcache;
		1288	} *data = (void *)data_;
1067		1289
		1290	errno = data->errorno;
		1291	PL_laststype = data->laststype;
		1292	PL_laststatval = data->laststatval;
		1293	PL_statcache = data->statcache;
		1294	}

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