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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.46 by pcg, Wed Nov 5 20:02:46 2003 UTC vs.
Revision 1.92 by root, Sun Nov 26 02:16:19 2006 UTC

		1	#define PERL_NO_GET_CONTEXT
		2
		3	#include "libcoro/coro.c"
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "patchlevel.h"	9	#include "patchlevel.h"
6		10
7	#if PATCHLEVEL < 6	11	#if PERL_VERSION < 6
8	# ifndef PL_ppaddr	12	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	13	# define PL_ppaddr ppaddr
10	# endif	14	# endif
11	# ifndef call_sv	15	# ifndef call_sv
12	# define call_sv perl_call_sv	16	# define call_sv perl_call_sv
…		…
23	# ifndef IS_PADCONST	27	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	28	# define IS_PADCONST(v) 0
25	# endif	29	# endif
26	#endif	30	#endif
27		31
28	#include "libcoro/coro.c"
29
30	#include <signal.h>	32	#include <stdio.h>
		33	#include <errno.h>
		34
		35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		36	# undef STACKGUARD
		37	#endif
		38
		39	#ifndef STACKGUARD
		40	# define STACKGUARD 0
		41	#endif
31		42
32	#ifdef HAVE_MMAP	43	#ifdef HAVE_MMAP
33	# include <unistd.h>	44	# include <unistd.h>
34	# include <sys/mman.h>	45	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS	46	# ifndef MAP_ANONYMOUS
…		…
37	# define MAP_ANONYMOUS MAP_ANON	48	# define MAP_ANONYMOUS MAP_ANON
38	# else	49	# else
39	# undef HAVE_MMAP	50	# undef HAVE_MMAP
40	# endif	51	# endif
41	# endif	52	# endif
		53	# include <limits.h>
		54	# ifndef PAGESIZE
		55	# define PAGESIZE pagesize
		56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		57	static long pagesize;
		58	# else
		59	# define BOOT_PAGESIZE
42	#endif	60	# endif
43		61	#endif
44	#define MAY_FLUSH /* increases codesize and is rarely used */
45
46	#define SUB_INIT "Coro::State::initialize"
47	#define UCORO_STATE "_coro_state"
48		62
49	/* The next macro should declare a variable stacklevel that contains and approximation	63	/* The next macro should declare a variable stacklevel that contains and approximation
50	* to the current C stack pointer. Its property is that it changes with each call	64	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	65	* and should be unique. */
		66	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	67	#define STACKLEVEL ((void *)&stacklevel)
53		68
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	69	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		70
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	71	#define labs(l) ((l) >= 0 ? (l) : -(l))
57		72
58	#include "CoroAPI.h"	73	#include "CoroAPI.h"
59		74
		75	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
		76
		77	#ifdef USE_ITHREADS
		78	static perl_mutex coro_mutex;
		79	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		80	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		81	#else
		82	# define LOCK (void)0
		83	# define UNLOCK (void)0
		84	#endif
		85
60	static struct CoroAPI coroapi;	86	static struct CoroAPI coroapi;
		87	static AV *main_mainstack; /* used to differentiate between $main and others */
		88	static HV *coro_state_stash, *coro_stash;
		89	static SV *coro_mortal; /* will be freed after next transfer */
61		90
62	/* this is actually not only the c stack but also c registers etc... */	91	/* this is a structure representing a c-level coroutine */
63	typedef struct {	92	typedef struct coro_stack {
64	int refcnt; /* pointer reference counter */	93	struct coro_stack *next;
65	int usecnt; /* shared by how many coroutines */
66	int gencnt; /* generation counter */
67		94
68	coro_context cctx;	95	void *idle_sp; /* original stacklevel when coroutine was created */
69
70	void *sptr;	96	void *sptr;
71	long ssize; /* positive == mmap, otherwise malloc */	97	long ssize; /* positive == mmap, otherwise malloc */
		98
		99	/* cpu state */
		100	coro_context cctx;
		101	JMPENV *top_env;
72	} coro_stack;	102	} coro_stack;
73		103
		104	/* the (fake) coro_stack representing the main program */
		105	static coro_stack *main_stack;
		106
		107	/* this is a structure representing a perl-level coroutine */
74	struct coro {	108	struct coro {
75	/* the top-level JMPENV for each coroutine, needed to catch dies. */	109	/* the c coroutine allocated to this perl coroutine, if any */
76	JMPENV start_env;
77
78	/* the optional C context */
79	coro_stack *stack;	110	coro_stack *stack;
80	void *cursp;	111
		112	/* data associated with this coroutine (initial args) */
		113	AV *args;
81	int gencnt;	114	int refcnt;
82		115
83	/* optionally saved, might be zero */	116	/* optionally saved, might be zero */
84	AV *defav;	117	AV *defav;
85	SV *defsv;	118	SV *defsv;
86	SV *errsv;	119	SV *errsv;
…		…
95	AV *mainstack;	128	AV *mainstack;
96	SV **stack_sp;	129	SV **stack_sp;
97	OP *op;	130	OP *op;
98	SV **curpad;	131	SV **curpad;
99	AV *comppad;	132	AV *comppad;
		133	CV *compcv;
100	SV **stack_base;	134	SV **stack_base;
101	SV **stack_max;	135	SV **stack_max;
102	SV **tmps_stack;	136	SV **tmps_stack;
103	I32 tmps_floor;	137	I32 tmps_floor;
104	I32 tmps_ix;	138	I32 tmps_ix;
…		…
113	I32 savestack_ix;	147	I32 savestack_ix;
114	I32 savestack_max;	148	I32 savestack_max;
115	OP **retstack;	149	OP **retstack;
116	I32 retstack_ix;	150	I32 retstack_ix;
117	I32 retstack_max;	151	I32 retstack_max;
		152	PMOP *curpm;
118	COP *curcop;	153	COP *curcop;
119	JMPENV *top_env;
120		154
121	/* data associated with this coroutine (initial args) */	155	/* coro process data */
122	AV *args;	156	int prio;
123	};	157	};
124		158
125	typedef struct coro *Coro__State;	159	typedef struct coro *Coro__State;
126	typedef struct coro *Coro__State_or_hashref;	160	typedef struct coro *Coro__State_or_hashref;
127		161
128	static AV *main_mainstack; /* used to differentiate between $main and others */	162	static AV *
129	static HV *coro_state_stash;	163	coro_clone_padlist (pTHX_ CV *cv)
130	static SV *ucoro_state_sv;
131	static U32 ucoro_state_hash;
132	static HV *padlist_cache;
133	static SV *coro_mortal; /* will be freed after next transfer */
134
135	/* mostly copied from op.c:cv_clone2 */
136	STATIC AV *
137	clone_padlist (AV *protopadlist)
138	{	164	{
139	AV *av;	165	AV *padlist = CvPADLIST (cv);
140	I32 ix;
141	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
142	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
143	SV **pname = AvARRAY (protopad_name);
144	SV **ppad = AvARRAY (protopad);
145	I32 fname = AvFILLp (protopad_name);
146	I32 fpad = AvFILLp (protopad);
147	AV *newpadlist, *newpad_name, *newpad;	166	AV *newpadlist, *newpad;
148	SV **npad;
149
150	newpad_name = newAV ();
151	for (ix = fname; ix >= 0; ix--)
152	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
153
154	newpad = newAV ();
155	av_fill (newpad, AvFILLp (protopad));
156	npad = AvARRAY (newpad);
157		167
158	newpadlist = newAV ();	168	newpadlist = newAV ();
159	AvREAL_off (newpadlist);	169	AvREAL_off (newpadlist);
160	av_store (newpadlist, 0, (SV *) newpad_name);	170	#if PERL_VERSION < 9
		171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		172	#else
		173	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 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)));
161	av_store (newpadlist, 1, (SV *) newpad);	179	av_store (newpadlist, 1, (SV *)newpad);
162		180
163	av = newAV (); /* will be @_ */	181	return newpadlist;
164	av_extend (av, 0);	182	}
165	av_store (newpad, 0, (SV *) av);
166	AvFLAGS (av) = AVf_REIFY;
167		183
168	for (ix = fpad; ix > 0; ix--)	184	static void
		185	free_padlist (pTHX_ AV *padlist)
		186	{
		187	/* may be during global destruction */
		188	if (SvREFCNT (padlist))
169	{	189	{
170	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	190	I32 i = AvFILLp (padlist);
171	if (namesv && namesv != &PL_sv_undef)	191	while (i >= 0)
172	{	192	{
173	char *name = SvPVX (namesv); /* XXX */	193	SV **svp = av_fetch (padlist, i--, FALSE);
174	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	194	if (svp)
175	{ /* lexical from outside? */
176	npad[ix] = SvREFCNT_inc (ppad[ix]);
177	}	195	{
178	else
179	{ /* our own lexical */
180	SV *sv;	196	SV *sv;
181	if (*name == '&')	197	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
182	sv = SvREFCNT_inc (ppad[ix]);	198	SvREFCNT_dec (sv);
183	else if (*name == '@')	199
184	sv = (SV *) newAV ();	200	SvREFCNT_dec (*svp);
185	else if (*name == '%')
186	sv = (SV *) newHV ();
187	else
188	sv = NEWSV (0, 0);
189	if (!SvPADBUSY (sv))
190	SvPADMY_on (sv);
191	npad[ix] = sv;
192	}	201	}
193	}	202	}
194	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	203
195	{	204	SvREFCNT_dec ((SV*)padlist);
196	npad[ix] = SvREFCNT_inc (ppad[ix]);
197	}
198	else
199	{
200	SV *sv = NEWSV (0, 0);
201	SvPADTMP_on (sv);
202	npad[ix] = sv;
203	}
204	}	205	}
		206	}
205		207
206	#if 0 /* return -ENOTUNDERSTOOD */	208	static int
207	/* 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;
208		213
209	for (ix = fpad; ix > 0; ix--) {	214	/* casting is fun. */
210	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
211	if (namesv	216	free_padlist (aTHX_ padlist);
212	&& namesv != &PL_sv_undef	217
213	&& !(SvFLAGS(namesv) & SVf_FAKE)	218	SvREFCNT_dec (av);
214	&& *SvPVX(namesv) == '&'	219
215	&& CvCLONE(ppad[ix]))	220	return 0;
216	{	221	}
217	CV *kid = cv_clone((CV*)ppad[ix]);	222
218	SvREFCNT_dec(ppad[ix]);	223	#define PERL_MAGIC_coro PERL_MAGIC_ext
219	CvCLONE_on(kid);	224
220	SvPADMY_on(kid);	225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221	npad[ix] = (SV*)kid;	226
222	}	227	/* the next two functions merely cache the padlists */
		228	static void
		229	get_padlist (pTHX_ CV *cv)
		230	{
		231	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		232
		233	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
		234	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
		235	else
		236	{
		237	#if 0
		238	/* this should work - but it doesn't :( */
		239	CV *cp = Perl_cv_clone (aTHX_ cv);
		240	CvPADLIST (cv) = CvPADLIST (cp);
		241	CvPADLIST (cp) = 0;
		242	SvREFCNT_dec (cp);
		243	#else
		244	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		245	#endif
		246	}
		247	}
		248
		249	static void
		250	put_padlist (pTHX_ CV *cv)
		251	{
		252	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		253
		254	if (!mg)
		255	{
		256	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		257	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		258	mg->mg_virtual = &vtbl_coro;
		259	mg->mg_obj = (SV *)newAV ();
223	}	260	}
224	#endif
225		261
226	return newpadlist;
227	}
228
229	#ifdef MAY_FLUSH
230	STATIC void
231	free_padlist (AV *padlist)
232	{
233	/* may be during global destruction */
234	if (SvREFCNT(padlist))
235	{
236	I32 i = AvFILLp(padlist);
237	while (i >= 0)
238	{
239	SV **svp = av_fetch(padlist, i--, FALSE);
240	SV *sv = svp ? *svp : Nullsv;
241	if (sv)
242	SvREFCNT_dec(sv);
243	}
244
245	SvREFCNT_dec((SV*)padlist);
246	}
247	}
248	#endif
249
250	/* the next two functions merely cache the padlists */
251	STATIC void
252	get_padlist (CV *cv)
253	{
254	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
255
256	if (he && AvFILLp ((AV *)*he) >= 0)
257	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
258	else
259	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
260	}
261
262	STATIC void
263	put_padlist (CV *cv)
264	{
265	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
266
267	if (SvTYPE (*he) != SVt_PVAV)
268	{
269	SvREFCNT_dec (*he);
270	*he = (SV *)newAV ();
271	}
272
273	av_push ((AV *)*he, (SV *)CvPADLIST (cv));	262	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
274	}	263	}
275
276	#ifdef MAY_FLUSH
277	STATIC void
278	flush_padlist_cache ()
279	{
280	HV *hv = padlist_cache;
281	padlist_cache = newHV ();
282
283	if (hv_iterinit (hv))
284	{
285	HE *he;
286	AV *padlist;
287
288	while (!!(he = hv_iternext (hv)))
289	{
290	AV *av = (AV *)HeVAL(he);
291
292	/* casting is fun. */
293	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
294	free_padlist (padlist);
295	}
296	}
297
298	SvREFCNT_dec (hv);
299	}
300	#endif
301		264
302	#define SB do {	265	#define SB do {
303	#define SE } while (0)	266	#define SE } while (0)
304		267
305	#define LOAD(state) load_state(aTHX_ (state));	268	#define LOAD(state) load_state(aTHX_ (state));
306	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	269	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
307		270
308	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	271	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
309		272
310	static void	273	static void
311	load_state(pTHX_ Coro__State c)	274	load_state(pTHX_ Coro__State c)
312	{	275	{
313	PL_dowarn = c->dowarn;	276	PL_dowarn = c->dowarn;
…		…
318	PL_mainstack = c->mainstack;	281	PL_mainstack = c->mainstack;
319	PL_stack_sp = c->stack_sp;	282	PL_stack_sp = c->stack_sp;
320	PL_op = c->op;	283	PL_op = c->op;
321	PL_curpad = c->curpad;	284	PL_curpad = c->curpad;
322	PL_comppad = c->comppad;	285	PL_comppad = c->comppad;
		286	PL_compcv = c->compcv;
323	PL_stack_base = c->stack_base;	287	PL_stack_base = c->stack_base;
324	PL_stack_max = c->stack_max;	288	PL_stack_max = c->stack_max;
325	PL_tmps_stack = c->tmps_stack;	289	PL_tmps_stack = c->tmps_stack;
326	PL_tmps_floor = c->tmps_floor;	290	PL_tmps_floor = c->tmps_floor;
327	PL_tmps_ix = c->tmps_ix;	291	PL_tmps_ix = c->tmps_ix;
…		…
333	PL_scopestack_ix = c->scopestack_ix;	297	PL_scopestack_ix = c->scopestack_ix;
334	PL_scopestack_max = c->scopestack_max;	298	PL_scopestack_max = c->scopestack_max;
335	PL_savestack = c->savestack;	299	PL_savestack = c->savestack;
336	PL_savestack_ix = c->savestack_ix;	300	PL_savestack_ix = c->savestack_ix;
337	PL_savestack_max = c->savestack_max;	301	PL_savestack_max = c->savestack_max;
		302	#if PERL_VERSION < 9
338	PL_retstack = c->retstack;	303	PL_retstack = c->retstack;
339	PL_retstack_ix = c->retstack_ix;	304	PL_retstack_ix = c->retstack_ix;
340	PL_retstack_max = c->retstack_max;	305	PL_retstack_max = c->retstack_max;
		306	#endif
		307	PL_curpm = c->curpm;
341	PL_curcop = c->curcop;	308	PL_curcop = c->curcop;
342	PL_top_env = c->top_env;
343		309
344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	310	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	311	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
346	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	312	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
347		313
…		…
354	{	320	{
355	AV *padlist = (AV *)POPs;	321	AV *padlist = (AV *)POPs;
356		322
357	if (padlist)	323	if (padlist)
358	{	324	{
359	put_padlist (cv); /* mark this padlist as available */	325	put_padlist (aTHX_ cv); /* mark this padlist as available */
360	CvPADLIST(cv) = padlist;	326	CvPADLIST(cv) = padlist;
361	#ifdef USE_THREADS
362	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
363	#endif
364	}	327	}
365		328
366	++CvDEPTH(cv);	329	++CvDEPTH(cv);
367	}	330	}
368		331
…		…
395	if (CxTYPE(cx) == CXt_SUB)	358	if (CxTYPE(cx) == CXt_SUB)
396	{	359	{
397	CV *cv = cx->blk_sub.cv;	360	CV *cv = cx->blk_sub.cv;
398	if (CvDEPTH(cv))	361	if (CvDEPTH(cv))
399	{	362	{
400	#ifdef USE_THREADS
401	/*XPUSHs ((SV *)CvOWNER(cv));*/
402	/*CvOWNER(cv) = 0;*/
403	/*error must unlock this cv etc.. etc...*/
404	#endif
405	EXTEND (SP, CvDEPTH(cv)*2);	363	EXTEND (SP, CvDEPTH(cv)*2);
406		364
407	while (--CvDEPTH(cv))	365	while (--CvDEPTH(cv))
408	{	366	{
409	/* this tells the restore code to increment CvDEPTH */	367	/* this tells the restore code to increment CvDEPTH */
…		…
412	}	370	}
413		371
414	PUSHs ((SV *)CvPADLIST(cv));	372	PUSHs ((SV *)CvPADLIST(cv));
415	PUSHs ((SV *)cv);	373	PUSHs ((SV *)cv);
416		374
417	get_padlist (cv); /* this is a monster */	375	get_padlist (aTHX_ cv);
418	}	376	}
419	}	377	}
420	#ifdef CXt_FORMAT	378	#ifdef CXt_FORMAT
421	else if (CxTYPE(cx) == CXt_FORMAT)	379	else if (CxTYPE(cx) == CXt_FORMAT)
422	{	380	{
…		…
450	c->mainstack = PL_mainstack;	408	c->mainstack = PL_mainstack;
451	c->stack_sp = PL_stack_sp;	409	c->stack_sp = PL_stack_sp;
452	c->op = PL_op;	410	c->op = PL_op;
453	c->curpad = PL_curpad;	411	c->curpad = PL_curpad;
454	c->comppad = PL_comppad;	412	c->comppad = PL_comppad;
		413	c->compcv = PL_compcv;
455	c->stack_base = PL_stack_base;	414	c->stack_base = PL_stack_base;
456	c->stack_max = PL_stack_max;	415	c->stack_max = PL_stack_max;
457	c->tmps_stack = PL_tmps_stack;	416	c->tmps_stack = PL_tmps_stack;
458	c->tmps_floor = PL_tmps_floor;	417	c->tmps_floor = PL_tmps_floor;
459	c->tmps_ix = PL_tmps_ix;	418	c->tmps_ix = PL_tmps_ix;
…		…
465	c->scopestack_ix = PL_scopestack_ix;	424	c->scopestack_ix = PL_scopestack_ix;
466	c->scopestack_max = PL_scopestack_max;	425	c->scopestack_max = PL_scopestack_max;
467	c->savestack = PL_savestack;	426	c->savestack = PL_savestack;
468	c->savestack_ix = PL_savestack_ix;	427	c->savestack_ix = PL_savestack_ix;
469	c->savestack_max = PL_savestack_max;	428	c->savestack_max = PL_savestack_max;
		429	#if PERL_VERSION < 9
470	c->retstack = PL_retstack;	430	c->retstack = PL_retstack;
471	c->retstack_ix = PL_retstack_ix;	431	c->retstack_ix = PL_retstack_ix;
472	c->retstack_max = PL_retstack_max;	432	c->retstack_max = PL_retstack_max;
		433	#endif
		434	c->curpm = PL_curpm;
473	c->curcop = PL_curcop;	435	c->curcop = PL_curcop;
474	c->top_env = PL_top_env;
475	}	436	}
476		437
477	/*	438	/*
478	* allocate various perl stacks. This is an exact copy	439	* allocate various perl stacks. This is an exact copy
479	* of perl.c:init_stacks, except that it uses less memory	440	* of perl.c:init_stacks, except that it uses less memory
480	* on the assumption that coroutines do not usually need	441	* on the (sometimes correct) assumption that coroutines do
481	* a lot of stackspace.	442	* not usually need a lot of stackspace.
482	*/	443	*/
483	STATIC void	444	static void
484	coro_init_stacks (pTHX)	445	coro_init_stacks (pTHX)
485	{	446	{
		447	LOCK;
		448
486	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	449	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
487	PL_curstackinfo->si_type = PERLSI_MAIN;	450	PL_curstackinfo->si_type = PERLSI_MAIN;
488	PL_curstack = PL_curstackinfo->si_stack;	451	PL_curstack = PL_curstackinfo->si_stack;
489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
490		453
…		…
511		474
512	New(54,PL_savestack,96,ANY);	475	New(54,PL_savestack,96,ANY);
513	PL_savestack_ix = 0;	476	PL_savestack_ix = 0;
514	PL_savestack_max = 96;	477	PL_savestack_max = 96;
515		478
		479	#if PERL_VERSION < 9
516	New(54,PL_retstack,8,OP*);	480	New(54,PL_retstack,8,OP*);
517	PL_retstack_ix = 0;	481	PL_retstack_ix = 0;
518	PL_retstack_max = 8;	482	PL_retstack_max = 8;
		483	#endif
		484
		485	UNLOCK;
519	}	486	}
520		487
521	/*	488	/*
522	* destroy the stacks, the callchain etc...	489	* destroy the stacks, the callchain etc...
523	* still there is a memleak of 128 bytes...
524	*/	490	*/
525	STATIC void	491	static void
526	destroy_stacks(pTHX)	492	destroy_stacks(pTHX)
527	{	493	{
528	if (!IN_DESTRUCT)	494	if (!IN_DESTRUCT)
529	{	495	{
530	/* is this ugly, I ask? */	496	/* is this ugly, I ask? */
531	while (PL_scopestack_ix)	497	LEAVE_SCOPE (0);
532	LEAVE;
533		498
534	/* sure it is, but more important: is it correct?? :/ */	499	/* sure it is, but more important: is it correct?? :/ */
535	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
536	FREETMPS;	500	FREETMPS;
		501
		502	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
537	}	503	}
538		504
539	while (PL_curstackinfo->si_next)	505	while (PL_curstackinfo->si_next)
540	PL_curstackinfo = PL_curstackinfo->si_next;	506	PL_curstackinfo = PL_curstackinfo->si_next;
541		507
542	while (PL_curstackinfo)	508	while (PL_curstackinfo)
543	{	509	{
544	PERL_SI *p = PL_curstackinfo->si_prev;	510	PERL_SI *p = PL_curstackinfo->si_prev;
545		511
546	{	512	{ /*D*//*remove*/
547	dSP;	513	dSP;
548	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
549	PUTBACK; /* possibly superfluous */	515	PUTBACK; /* possibly superfluous */
550	}	516	}
551		517
552	if (!IN_DESTRUCT)	518	if (!IN_DESTRUCT)
553	{	519	{
554	dounwind(-1);	520	dounwind (-1);/*D*//*remove*/
555	SvREFCNT_dec(PL_curstackinfo->si_stack);	521	SvREFCNT_dec (PL_curstackinfo->si_stack);
556	}	522	}
557		523
558	Safefree(PL_curstackinfo->si_cxstack);	524	Safefree (PL_curstackinfo->si_cxstack);
559	Safefree(PL_curstackinfo);	525	Safefree (PL_curstackinfo);
560	PL_curstackinfo = p;	526	PL_curstackinfo = p;
561	}	527	}
562		528
563	Safefree(PL_tmps_stack);	529	Safefree (PL_tmps_stack);
564	Safefree(PL_markstack);	530	Safefree (PL_markstack);
565	Safefree(PL_scopestack);	531	Safefree (PL_scopestack);
566	Safefree(PL_savestack);	532	Safefree (PL_savestack);
		533	#if PERL_VERSION < 9
567	Safefree(PL_retstack);	534	Safefree (PL_retstack);
568	}
569
570	static void
571	allocate_stack (Coro__State ctx, int alloc)
572	{
573	coro_stack *stack;
574
575	New (0, stack, 1, coro_stack);
576
577	stack->refcnt = 1;
578	stack->usecnt = 1;
579	stack->gencnt = ctx->gencnt = 0;
580	if (alloc)
581	{
582	#if HAVE_MMAP
583	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
584	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
585	if (stack->sptr == (void *)-1)
586	#endif	535	#endif
587	{
588	/*FIXME*//*D*//* reasonable stack size! */
589	stack->ssize = -4096 * sizeof (long);
590	New (0, stack->sptr, 4096, long);
591	}
592	}
593	else
594	stack->sptr = 0;
595
596	ctx->stack = stack;
597	}	536	}
598		537
599	static void	538	static void
600	deallocate_stack (Coro__State ctx)	539	setup_coro (struct coro *coro)
601	{
602	coro_stack *stack = ctx->stack;
603
604	ctx->stack = 0;
605
606	if (stack)
607	{
608	if (!--stack->refcnt)
609	{
610	#ifdef HAVE_MMAP
611	if (stack->ssize > 0 && stack->sptr)
612	munmap (stack->sptr, stack->ssize);
613	else
614	#else
615	Safefree (stack->sptr);
616	#endif
617	Safefree (stack);
618	}
619	else if (ctx->gencnt == stack->gencnt)
620	--stack->usecnt;
621	}
622	}
623
624	static void
625	setup_coro (void *arg)
626	{	540	{
627	/*	541	/*
628	* emulate part of the perl startup here.	542	* emulate part of the perl startup here.
629	*/	543	*/
		544	dTHX;
630	dSP;	545	dSP;
631	Coro__State ctx = (Coro__State)arg;	546	UNOP myop;
632	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);	547	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
633		548
634	coro_init_stacks (aTHX);	549	coro_init_stacks (aTHX);
635	/*PL_curcop = 0;*/	550	/*PL_curcop = 0;*/
636	/*PL_in_eval = PL_in_eval;*/ /* inherit */	551	/*PL_in_eval = PL_in_eval;*/ /* inherit */
637	SvREFCNT_dec (GvAV (PL_defgv));	552	SvREFCNT_dec (GvAV (PL_defgv));
638	GvAV (PL_defgv) = ctx->args;	553	GvAV (PL_defgv) = coro->args; coro->args = 0;
639		554
640	SPAGAIN;	555	SPAGAIN;
641		556
642	if (ctx->stack)
643	{
644	ctx->cursp = 0;
645
646	PUSHMARK(SP);
647	PUTBACK;
648	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
649
650	if (SvTRUE (ERRSV))
651	croak (NULL);
652	else
653	croak ("FATAL: CCTXT coroutine returned!");
654	}
655	else
656	{
657	UNOP myop;
658
659	PL_op = (OP *)&myop;
660
661	Zero(&myop, 1, UNOP);	557	Zero (&myop, 1, UNOP);
662	myop.op_next = Nullop;	558	myop.op_next = Nullop;
663	myop.op_flags = OPf_WANT_VOID;	559	myop.op_flags = OPf_WANT_VOID;
664		560
		561	PL_op = (OP *)&myop;
		562
665	PUSHMARK(SP);	563	PUSHMARK(SP);
666	XPUSHs (sub_init);	564	XPUSHs (sub_init);
667	/*
668	* the next line is slightly wrong, as PL_op->op_next
669	* is actually being executed so we skip the first op.
670	* that doesn't matter, though, since it is only
671	* pp_nextstate and we never return...
672	* ah yes, and I don't care anyways ;)
673	*/
674	PUTBACK;	565	PUTBACK;
675	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
676	SPAGAIN;	567	SPAGAIN;
677		568
678	ENTER; /* necessary e.g. for dounwind */	569	ENTER; /* necessary e.g. for dounwind */
679	}
680	}	570	}
681		571
682	static void	572	static void
683	continue_coro (void *arg)	573	free_coro_mortal ()
684	{	574	{
685	/*
686	* this is a _very_ stripped down perl interpreter ;)
687	*/
688	Coro__State ctx = (Coro__State)arg;
689	JMPENV coro_start_env;
690
691	PL_top_env = &ctx->start_env;
692
693	ctx->cursp = 0;
694	PL_op = PL_op->op_next;
695	CALLRUNOPS(aTHX);
696
697	abort ();
698	}
699
700	STATIC void
701	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
702	{
703	dSTACKLEVEL;
704	static struct coro *xnext;
705
706	if (prev != next)
707	{
708	xnext = next;
709
710	if (next->mainstack)
711	{
712	SAVE (prev, flags);
713	LOAD (next);
714
715	/* mark this state as in-use */
716	next->mainstack = 0;
717	next->tmps_ix = -2;
718
719	/* stacklevel changed? if yes, grab the stack for us! */
720	if (flags & TRANSFER_SAVE_CCTXT)
721	{
722	if (!prev->stack)
723	allocate_stack (prev, 0);
724	else if (prev->cursp != stacklevel
725	&& prev->stack->usecnt > 1)
726	{
727	prev->gencnt = ++prev->stack->gencnt;
728	prev->stack->usecnt = 1;
729	}
730
731	/* has our stack been invalidated? */
732	if (next->stack && next->stack->gencnt != next->gencnt)
733	{
734	deallocate_stack (next);
735	allocate_stack (next, 1);
736	coro_create (&(next->stack->cctx),
737	continue_coro, (void *)next,
738	next->stack->sptr, labs (next->stack->ssize));
739	}
740
741	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
742	/* don't add any code here */
743	}
744
745	}
746	else if (next->tmps_ix == -2)
747	croak ("tried to transfer to running coroutine");
748	else
749	{
750	SAVE (prev, -1); /* first get rid of the old state */
751
752	if (flags & TRANSFER_SAVE_CCTXT)
753	{
754	if (!prev->stack)
755	allocate_stack (prev, 0);
756
757	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
758	{
759	PL_top_env = &next->start_env;
760
761	setup_coro (next);
762
763	prev->stack->refcnt++;
764	prev->stack->usecnt++;
765	next->stack = prev->stack;
766	next->gencnt = prev->gencnt;
767	}
768	else
769	{
770	allocate_stack (next, 1);
771	coro_create (&(next->stack->cctx),
772	setup_coro, (void *)next,
773	next->stack->sptr, labs (next->stack->ssize));
774	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
775	/* don't add any code here */
776	}
777	}
778	else
779	setup_coro (next);
780	}
781
782	/*
783	* xnext is now either prev or next, depending on wether
784	* we switched the c stack or not. that's why I use a global
785	* variable, that should become thread-specific at one point.
786	*/
787	xnext->cursp = stacklevel;
788	}
789
790	if (coro_mortal)	575	if (coro_mortal)
791	{	576	{
792	SvREFCNT_dec (coro_mortal);	577	SvREFCNT_dec (coro_mortal);
793	coro_mortal = 0;	578	coro_mortal = 0;
794	}	579	}
795	}	580	}
796		581
797	#define SV_CORO(sv,func) \	582	static void
798	do { \	583	coro_run (void *arg)
799	if (SvROK (sv)) \	584	{
800	sv = SvRV (sv); \	585	/*
801	\	586	* this is a _very_ stripped down perl interpreter ;)
802	if (SvTYPE(sv) == SVt_PVHV) \	587	*/
803	{ \	588	dTHX;
804	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \	589	PL_top_env = &PL_start_env;
805	\
806	if (!he) \
807	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
808	\
809	(sv) = SvRV (HeVAL(he)); \
810	} \
811	\
812	/* must also be changed inside Coro::Cont::yield */ \
813	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
814	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
815	\
816	} while(0)
817		590
818	#define SvSTATE(sv) (struct coro *)SvIV (sv)	591	UNLOCK;
819		592
		593	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
		594	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
		595	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
		596
		597	/* somebody will hit me for both perl_run and PL_restart_op */
		598	perl_run (aTHX_ PERL_GET_CONTEXT);
		599
		600	abort ();
		601	}
		602
		603	static coro_stack *
		604	stack_new ()
		605	{
		606	coro_stack *stack;
		607
		608	New (0, stack, 1, coro_stack);
		609
		610	#if HAVE_MMAP
		611
		612	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
		613	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		614
		615	if (stack->sptr == (void *)-1)
		616	{
		617	perror ("FATAL: unable to mmap stack for coroutine");
		618	_exit (EXIT_FAILURE);
		619	}
		620
		621	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		622
		623	#else
		624
		625	stack->ssize = STACKSIZE * (long)sizeof (long);
		626	New (0, stack->sptr, STACKSIZE, long);
		627
		628	if (!stack->sptr)
		629	{
		630	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		631	_exit (EXIT_FAILURE);
		632	}
		633
		634	#endif
		635
		636	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		637
		638	return stack;
		639	}
		640
		641	static void
		642	stack_free (coro_stack *stack)
		643	{
		644	if (!stack || stack == main_stack)
		645	return;
		646
		647	#if HAVE_MMAP
		648	munmap (stack->sptr, stack->ssize);
		649	#else
		650	Safefree (stack->sptr);
		651	#endif
		652
		653	Safefree (stack);
		654	}
		655
		656	static coro_stack *stack_first;
		657
		658	static coro_stack *
		659	stack_get ()
		660	{
		661	coro_stack *stack;
		662
		663	if (stack_first)
		664	{
		665	stack = stack_first;
		666	stack_first = stack->next;
		667	}
		668	else
		669	{
		670	stack = stack_new ();
		671	PL_op = PL_op->op_next;
		672	}
		673
		674	return stack;
		675	}
		676
		677	static void
		678	stack_put (coro_stack *stack)
		679	{
		680	stack->next = stack_first;
		681	stack_first = stack;
		682	}
		683
		684	/* never call directly, always through the coro_state_transfer global variable */
		685	static void
		686	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
		687	{
		688	dSTACKLEVEL;
		689
		690	/* sometimes transfer is only called to set idle_sp */
		691	if (flags == TRANSFER_SET_STACKLEVEL)
		692	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		693	else if (prev != next)
		694	{
		695	coro_stack *prev__stack;
		696
		697	LOCK;
		698
		699	if (next->mainstack)
		700	{
		701	/* coroutine already started */
		702	SAVE (prev, flags);
		703	LOAD (next);
		704	}
		705	else
		706	{
		707	/* need to start coroutine */
		708	/* first get rid of the old state */
		709	SAVE (prev, -1);
		710	/* setup coroutine call */
		711	setup_coro (next);
		712	/* need a stack */
		713	next->stack = 0;
		714	}
		715
		716	prev__stack = prev->stack;
		717
		718	/* possibly "free" the stack */
		719	if (prev__stack->idle_sp == STACKLEVEL)
		720	{
		721	stack_put (prev__stack);
		722	prev->stack = 0;
		723	}
		724
		725	if (!next->stack)
		726	next->stack = stack_get ();
		727
		728	if (prev__stack != next->stack)
		729	{
		730	prev__stack->top_env = PL_top_env;
		731	PL_top_env = next->stack->top_env;
		732	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		733	}
		734
		735	free_coro_mortal ();
		736
		737	UNLOCK;
		738	}
		739	}
		740
		741	/* use this function pointer to call the above function */
		742	/* this is done to increase chances of the compiler not inlining the call */
		743	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
		744	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
		745
		746	struct transfer_args
		747	{
		748	struct coro *prev, *next;
		749	int flags;
		750	};
		751
		752	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
		753
		754	static void
		755	coro_state_destroy (struct coro *coro)
		756	{
		757	if (coro->refcnt--)
		758	return;
		759
		760	if (coro->mainstack && coro->mainstack != main_mainstack)
		761	{
		762	struct coro temp;
		763
		764	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
		765	LOAD (aTHX_ coro);
		766
		767	destroy_stacks (aTHX);
		768
		769	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		770
		771	coro->mainstack = 0;
		772	}
		773
		774	stack_free (coro->stack);
		775	SvREFCNT_dec (coro->args);
		776	Safefree (coro);
		777	}
		778
820	static void	779	static int
		780	coro_state_clear (SV *sv, MAGIC *mg)
		781	{
		782	struct coro *coro = (struct coro *)mg->mg_ptr;
		783	mg->mg_ptr = 0;
		784
		785	coro_state_destroy (coro);
		786
		787	return 0;
		788	}
		789
		790	static int
		791	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)
		792	{
		793	struct coro *coro = (struct coro *)mg->mg_ptr;
		794
		795	++coro->refcnt;
		796
		797	return 0;
		798	}
		799
		800	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
		801
		802	static struct coro *
		803	SvSTATE (SV *coro)
		804	{
		805	HV *stash;
		806	MAGIC *mg;
		807
		808	if (SvROK (coro))
		809	coro = SvRV (coro);
		810
		811	stash = SvSTASH (coro);
		812	if (stash != coro_stash && stash != coro_state_stash)
		813	{
		814	/* very slow, but rare, check */
		815	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		816	croak ("Coro::State object required");
		817	}
		818
		819	mg = SvMAGIC (coro);
		820	assert (mg->mg_type == PERL_MAGIC_ext);
		821	return (struct coro *)mg->mg_ptr;
		822	}
		823
		824	static void
		825	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)
		826	{
		827	ta->prev = SvSTATE (prev);
		828	ta->next = SvSTATE (next);
		829	ta->flags = flags;
		830	}
		831
		832	static void
821	api_transfer(pTHX_ SV *prev, SV *next, int flags)	833	api_transfer (SV *prev, SV *next, int flags)
822	{	834	{
823	SV_CORO (prev, "Coro::transfer");	835	dTHX;
824	SV_CORO (next, "Coro::transfer");	836	struct transfer_args ta;
825		837
826	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	838	prepare_transfer (aTHX_ &ta, prev, next, flags);
		839	TRANSFER (ta);
827	}	840	}
828		841
829	/** Coro ********************************************************************/	842	/** Coro ********************************************************************/
830		843
831	#define PRIO_MAX 3	844	#define PRIO_MAX 3
…		…
835	#define PRIO_IDLE -3	848	#define PRIO_IDLE -3
836	#define PRIO_MIN -4	849	#define PRIO_MIN -4
837		850
838	/* for Coro.pm */	851	/* for Coro.pm */
839	static GV *coro_current, *coro_idle;	852	static GV *coro_current, *coro_idle;
840	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	853	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
841	static int coro_nready;	854	static int coro_nready;
842		855
843	static void	856	static void
844	coro_enq (SV *sv)	857	coro_enq (pTHX_ SV *sv)
845	{	858	{
		859	int prio;
		860
846	if (SvTYPE (sv) == SVt_PVHV)	861	if (SvTYPE (sv) != SVt_PVHV)
847	{
848	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
849	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
850
851	prio = prio > PRIO_MAX ? PRIO_MAX
852	: prio < PRIO_MIN ? PRIO_MIN
853	: prio;
854
855	av_push (coro_ready [prio - PRIO_MIN], sv);
856	coro_nready++;
857
858	return;
859	}
860
861	croak ("Coro::ready tried to enqueue something that is not a coroutine");	862	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		863
		864	prio = SvSTATE (sv)->prio;
		865
		866	av_push (coro_ready [prio - PRIO_MIN], sv);
		867	coro_nready++;
862	}	868	}
863		869
864	static SV *	870	static SV *
865	coro_deq (int min_prio)	871	coro_deq (pTHX_ int min_prio)
866	{	872	{
867	int prio = PRIO_MAX - PRIO_MIN;	873	int prio = PRIO_MAX - PRIO_MIN;
868		874
869	min_prio -= PRIO_MIN;	875	min_prio -= PRIO_MIN;
870	if (min_prio < 0)	876	if (min_prio < 0)
871	min_prio = 0;	877	min_prio = 0;
872		878
873	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	879	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
874	if (av_len (coro_ready[prio]) >= 0)	880	if (AvFILLp (coro_ready [prio]) >= 0)
875	{	881	{
876	coro_nready--;	882	coro_nready--;
877	return av_shift (coro_ready[prio]);	883	return av_shift (coro_ready [prio]);
878	}	884	}
879		885
880	return 0;	886	return 0;
881	}	887	}
882		888
883	static void	889	static void
884	api_ready (SV *coro)	890	api_ready (SV *coro)
885	{	891	{
		892	dTHX;
		893
886	if (SvROK (coro))	894	if (SvROK (coro))
887	coro = SvRV (coro);	895	coro = SvRV (coro);
888		896
		897	LOCK;
889	coro_enq (SvREFCNT_inc (coro));	898	coro_enq (aTHX_ SvREFCNT_inc (coro));
		899	UNLOCK;
		900	}
		901
		902	static void
		903	prepare_schedule (aTHX_ struct transfer_args *ta)
		904	{
		905	SV *current, *prev, *next;
		906
		907	LOCK;
		908
		909	current = GvSV (coro_current);
		910
		911	for (;;)
		912	{
		913	LOCK;
		914
		915	next = coro_deq (aTHX_ PRIO_MIN);
		916
		917	if (next)
		918	break;
		919
		920	UNLOCK;
		921
		922	{
		923	dSP;
		924
		925	ENTER;
		926	SAVETMPS;
		927
		928	PUSHMARK (SP);
		929	PUTBACK;
		930	call_sv (GvSV (coro_idle), G_DISCARD);
		931
		932	FREETMPS;
		933	LEAVE;
		934	}
		935	}
		936
		937	prev = SvRV (current);
		938	SvRV (current) = next;
		939
		940	/* free this only after the transfer */
		941	free_coro_mortal ();
		942	coro_mortal = prev;
		943
		944	ta->prev = SvSTATE (prev);
		945	ta->next = SvSTATE (next);
		946	ta->flags = TRANSFER_SAVE_ALL;
		947
		948	UNLOCK;
		949	}
		950
		951	static void
		952	prepare_cede (aTHX_ struct transfer_args *ta)
		953	{
		954	LOCK;
		955	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
		956	UNLOCK;
		957
		958	prepare_schedule (ta);
890	}	959	}
891		960
892	static void	961	static void
893	api_schedule (void)	962	api_schedule (void)
894	{	963	{
895	SV *prev, *next;	964	dTHX;
		965	struct transfer_args ta;
896		966
897	prev = SvRV (GvSV (coro_current));	967	prepare_schedule (&ta);
898	next = coro_deq (PRIO_MIN);	968	TRANSFER (ta);
899
900	if (!next)
901	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
902
903	/* free this only after the transfer */
904	coro_mortal = prev;
905	SV_CORO (prev, "Coro::schedule");
906
907	SvRV (GvSV (coro_current)) = next;
908
909	SV_CORO (next, "Coro::schedule");
910
911	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
912	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
913	}	969	}
914		970
915	static void	971	static void
916	api_cede (void)	972	api_cede (void)
917	{	973	{
918	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	974	dTHX;
		975	struct transfer_args ta;
919		976
920	api_schedule ();	977	prepare_cede (&ta);
		978	TRANSFER (ta);
921	}	979	}
922		980
923	MODULE = Coro::State PACKAGE = Coro::State	981	MODULE = Coro::State PACKAGE = Coro::State
924		982
925	PROTOTYPES: ENABLE	983	PROTOTYPES: DISABLE
926		984
927	BOOT:	985	BOOT:
928	{ /* {} necessary for stoopid perl-5.6.x */	986	{
929	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	987	#ifdef USE_ITHREADS
930	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	988	MUTEX_INIT (&coro_mutex);
		989	#endif
		990	BOOT_PAGESIZE;
		991
931	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	992	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
932		993
933	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	994	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
934	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	995	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
935	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	996	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
936	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
937
938	if (!padlist_cache)
939	padlist_cache = newHV ();
940		997
941	main_mainstack = PL_mainstack;	998	main_mainstack = PL_mainstack;
942		999
943	coroapi.ver = CORO_API_VERSION;	1000	coroapi.ver = CORO_API_VERSION;
944	coroapi.transfer = api_transfer;	1001	coroapi.transfer = api_transfer;
945	}
946		1002
947	Coro::State	1003	Newz (0, main_stack, 1, coro_stack);
948	_newprocess(args)	1004	main_stack->idle_sp = (void *)-1;
949	SV * args	1005
950	PROTOTYPE: $	1006	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1007	}
		1008
		1009	SV *
		1010	new (char *klass, ...)
951	CODE:	1011	CODE:
952	Coro__State coro;	1012	{
		1013	struct coro *coro;
		1014	HV *hv;
		1015	int i;
953		1016
954	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
955	croak ("Coro::State::_newprocess expects an arrayref");
956
957	New (0, coro, 1, struct coro);	1017	Newz (0, coro, 1, struct coro);
		1018	coro->args = newAV ();
958		1019
959	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1020	hv = newHV ();
		1021	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1022	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1023
		1024	for (i = 1; i < items; i++)
		1025	av_push (coro->args, newSVsv (ST (i)));
		1026
		1027	coro->stack = main_stack;
960	coro->mainstack = 0; /* actual work is done inside transfer */	1028	/*coro->mainstack = 0; *//*actual work is done inside transfer */
961	coro->stack = 0;	1029	/*coro->stack = 0;*/
962		1030	}
963	/* same as JMPENV_BOOTSTRAP */
964	/* we might be able to recycle start_env, but safe is safe */
965	Zero(&coro->start_env, 1, JMPENV);
966	coro->start_env.je_ret = -1;
967	coro->start_env.je_mustcatch = TRUE;
968
969	RETVAL = coro;
970	OUTPUT:	1031	OUTPUT:
971	RETVAL	1032	RETVAL
972		1033
973	void	1034	void
974	transfer(prev, next, flags)	1035	transfer (...)
975	SV *prev	1036	ALIAS:
976	SV *next	1037	Coro::schedule = 1
977	int flags	1038	Coro::cede = 2
978	PROTOTYPE: @	1039	_set_stacklevel = 3
979	CODE:	1040	CODE:
980	PUTBACK;	1041	{
981	SV_CORO (next, "Coro::transfer");	1042	struct transfer_args ta;
982	SV_CORO (prev, "Coro::transfer");	1043
983	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1044	switch (ix)
984	SPAGAIN;	1045	{
		1046	case 0:
		1047	if (items != 3)
		1048	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1049
		1050	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1051	break;
		1052
		1053	case 1:
		1054	prepare_schedule (&ta);
		1055	break;
		1056
		1057	case 2:
		1058	prepare_cede (&ta);
		1059	break;
		1060
		1061	case 3:
		1062	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
		1063	ta.next = 0;
		1064	ta.flags = TRANSFER_SET_STACKLEVEL;
		1065	break;
		1066	}
		1067
		1068	TRANSFER (ta);
		1069	}
985		1070
986	void	1071	void
987	DESTROY(coro)	1072	_clone_state_from (SV *dst, SV *src)
988	Coro::State coro	1073	CODE:
989	CODE:	1074	{
		1075	struct coro *coro_src = SvSTATE (src);
990		1076
991	if (coro->mainstack && coro->mainstack != main_mainstack)	1077	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
992	{
993	struct coro temp;
994		1078
995	PUTBACK;	1079	++coro_src->refcnt;
996	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1080	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
997	LOAD(aTHX_ coro);	1081	}
998	SPAGAIN;
999
1000	destroy_stacks (aTHX);
1001
1002	LOAD((&temp)); /* this will get rid of defsv etc.. */
1003	SPAGAIN;
1004
1005	coro->mainstack = 0;
1006	}
1007
1008	deallocate_stack (coro);
1009
1010	Safefree (coro);
1011		1082
1012	void	1083	void
1013	flush()	1084	_nonlocal_goto (IV nextop)
1014	CODE:	1085	CODE:
1015	#ifdef MAY_FLUSH	1086	/* uuh, somebody will kill me again for this */
1016	flush_padlist_cache ();	1087	PL_op->op_next = INT2PTR (OP *, nextop);
1017	#endif
1018		1088
1019	void	1089	void
1020	_exit(code)	1090	_exit (code)
1021	int code	1091	int code
1022	PROTOTYPE: $	1092	PROTOTYPE: $
1023	CODE:	1093	CODE:
1024	#if defined(__GLIBC__) || _POSIX_C_SOURCE
1025	_exit (code);	1094	_exit (code);
1026	#else
1027	signal (SIGTERM, SIG_DFL);
1028	raise (SIGTERM);
1029	exit (code);
1030	#endif
1031		1095
1032	MODULE = Coro::State PACKAGE = Coro::Cont	1096	MODULE = Coro::State PACKAGE = Coro::Cont
1033		1097
1034	# this is slightly dirty (should expose a c-level api)
1035
1036	void	1098	void
1037	yield(...)	1099	yield (...)
1038	PROTOTYPE: @	1100	PROTOTYPE: @
1039	CODE:	1101	CODE:
1040	static SV *returnstk;	1102	{
		1103	SV *yieldstack;
1041	SV *sv;	1104	SV *sv;
1042	AV *defav = GvAV (PL_defgv);	1105	AV *defav = GvAV (PL_defgv);
1043	struct coro *prev, *next;	1106	struct coro *prev, *next;
1044		1107
1045	if (!returnstk)	1108	yieldstack = *hv_fetch (
1046	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));	1109	(HV *)SvRV (GvSV (coro_current)),
		1110	"yieldstack", sizeof ("yieldstack") - 1,
		1111	0
		1112	);
1047		1113
1048	/* set up @_ -- ugly */	1114	/* set up @_ -- ugly */
1049	av_clear (defav);	1115	av_clear (defav);
1050	av_fill (defav, items - 1);	1116	av_fill (defav, items - 1);
1051	while (items--)	1117	while (items--)
1052	av_store (defav, items, SvREFCNT_inc (ST(items)));	1118	av_store (defav, items, SvREFCNT_inc (ST(items)));
1053		1119
1054	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1055	sv = av_pop ((AV *)SvRV (returnstk));	1120	sv = av_pop ((AV *)SvRV (yieldstack));
1056	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));	1121	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1057	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));	1122	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1058	SvREFCNT_dec (sv);	1123	SvREFCNT_dec (sv);
1059		1124
1060	transfer(aTHX_ prev, next, 0);	1125	coro_state_transfer (aTHX_ prev, next, 0);
		1126	}
1061		1127
1062	MODULE = Coro::State PACKAGE = Coro	1128	MODULE = Coro::State PACKAGE = Coro
1063		1129
1064	# this is slightly dirty (should expose a c-level api)
1065
1066	BOOT:	1130	BOOT:
1067	{	1131	{
1068	int i;	1132	int i;
		1133
1069	HV *stash = gv_stashpv ("Coro", TRUE);	1134	coro_stash = gv_stashpv ("Coro", TRUE);
1070		1135
1071	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1136	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1137	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1138	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1139	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1140	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1141	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1077		1142
1078	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1143	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1079	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1144	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1080		1145
1081	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1146	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1089	coroapi.ready = api_ready;	1154	coroapi.ready = api_ready;
1090	coroapi.nready = &coro_nready;	1155	coroapi.nready = &coro_nready;
1091	coroapi.current = coro_current;	1156	coroapi.current = coro_current;
1092		1157
1093	GCoroAPI = &coroapi;	1158	GCoroAPI = &coroapi;
1094	sv_setiv(sv, (IV)&coroapi);	1159	sv_setiv (sv, (IV)&coroapi);
1095	SvREADONLY_on(sv);	1160	SvREADONLY_on (sv);
1096	}	1161	}
1097	}	1162	}
1098		1163
		1164	int
		1165	prio (Coro::State coro, int newprio = 0)
		1166	ALIAS:
		1167	nice = 1
		1168	CODE:
		1169	{
		1170	RETVAL = coro->prio;
		1171
		1172	if (items > 1)
		1173	{
		1174	if (ix)
		1175	newprio += coro->prio;
		1176
		1177	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1178	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1179
		1180	coro->prio = newprio;
		1181	}
		1182	}
		1183
1099	void	1184	void
1100	ready(self)	1185	ready (SV *self)
1101	SV * self
1102	PROTOTYPE: $	1186	PROTOTYPE: $
1103	CODE:	1187	CODE:
1104	api_ready (self);	1188	api_ready (self);
1105		1189
1106	int	1190	int
1107	nready(...)	1191	nready (...)
1108	PROTOTYPE:	1192	PROTOTYPE:
1109	CODE:	1193	CODE:
1110	RETVAL = coro_nready;	1194	RETVAL = coro_nready;
1111	OUTPUT:	1195	OUTPUT:
1112	RETVAL	1196	RETVAL
1113		1197
		1198	MODULE = Coro::State PACKAGE = Coro::AIO
		1199
		1200	SV *
		1201	_get_state ()
		1202	CODE:
		1203	{
		1204	struct {
		1205	int errorno;
		1206	int laststype;
		1207	int laststatval;
		1208	Stat_t statcache;
		1209	} data;
		1210
		1211	data.errorno = errno;
		1212	data.laststype = PL_laststype;
		1213	data.laststatval = PL_laststatval;
		1214	data.statcache = PL_statcache;
		1215
		1216	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1217	}
		1218	OUTPUT:
		1219	RETVAL
		1220
1114	void	1221	void
1115	schedule(...)	1222	_set_state (char *data_)
1116	PROTOTYPE:	1223	PROTOTYPE: $
1117	CODE:	1224	CODE:
1118	api_schedule ();	1225	{
		1226	struct {
		1227	int errorno;
		1228	int laststype;
		1229	int laststatval;
		1230	Stat_t statcache;
		1231	} *data = (void *)data_;
1119		1232
1120	void	1233	errno = data->errorno;
1121	cede(...)	1234	PL_laststype = data->laststype;
1122	PROTOTYPE:	1235	PL_laststatval = data->laststatval;
1123	CODE:	1236	PL_statcache = data->statcache;
1124	api_cede ();	1237	}
1125

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