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Comparing Coro/Coro/State.xs (file contents):
Revision 1.49 by pcg, Sun Nov 23 03:34:13 2003 UTC vs.
Revision 1.108 by root, Mon Nov 27 18:15:47 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 "patchlevel.h"	7	#include "patchlevel.h"
6		8
7	#if PATCHLEVEL < 6	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)
8	# ifndef PL_ppaddr	20	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	21	# define PL_ppaddr ppaddr
10	# endif	22	# endif
11	# ifndef call_sv	23	# ifndef call_sv
12	# define call_sv perl_call_sv	24	# define call_sv perl_call_sv
…		…
23	# ifndef IS_PADCONST	35	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	36	# define IS_PADCONST(v) 0
25	# endif	37	# endif
26	#endif	38	#endif
27		39
28	#include "libcoro/coro.c"
29
30	#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
31		50
32	#ifdef HAVE_MMAP	51	#ifdef HAVE_MMAP
33	# include <unistd.h>	52	# include <unistd.h>
34	# include <sys/mman.h>	53	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
…		…
37	# define MAP_ANONYMOUS MAP_ANON	56	# define MAP_ANONYMOUS MAP_ANON
38	# else	57	# else
39	# undef HAVE_MMAP	58	# undef HAVE_MMAP
40	# endif	59	# endif
41	# 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
42	#endif	68	# endif
43		69	#else
44	#define MAY_FLUSH /* increases codesize and is rarely used */	70	# define PAGESIZE 0
45		71	# define BOOT_PAGESIZE (void)0
46	#define SUB_INIT "Coro::State::initialize"	72	#endif
47	#define UCORO_STATE "_coro_state"
48		73
49	/* 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
50	* 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
51	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
53		79
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		81
56	#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))
57		89
58	#include "CoroAPI.h"	90	#include "CoroAPI.h"
59		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
60	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 */
61		107
62	/* this is actually not only the c stack but also c registers etc... */	108	static struct coro_cctx *cctx_first;
		109	static int cctx_count, cctx_idle;
		110
		111	/* this is a structure representing a c-level coroutine */
63	typedef struct {	112	typedef struct coro_cctx {
64	int refcnt; /* pointer reference counter */	113	struct coro_cctx *next;
65	int usecnt; /* shared by how many coroutines */
66	int gencnt; /* generation counter */
67		114
68	coro_context cctx;	115	/* the stack */
69
70	void *sptr;	116	void *sptr;
71	long ssize; /* positive == mmap, otherwise malloc */	117	long ssize; /* positive == mmap, otherwise malloc */
72	} coro_stack;
73		118
		119	/* cpu state */
		120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		121	JMPENV *top_env;
		122	coro_context cctx;
		123
		124	#if USE_VALGRIND
		125	int valgrind_id;
		126	#endif
		127	} coro_cctx;
		128
		129	/* this is a structure representing a perl-level coroutine */
74	struct coro {	130	struct coro {
75	/* the top-level JMPENV for each coroutine, needed to catch dies. */	131	/* the c coroutine allocated to this perl coroutine, if any */
76	JMPENV start_env;	132	coro_cctx *cctx;
77		133
78	/* the optional C context */	134	/* data associated with this coroutine (initial args) */
79	coro_stack *stack;	135	AV *args;
80	void *cursp;
81	int gencnt;	136	int refcnt;
82		137
83	/* optionally saved, might be zero */	138	/* optionally saved, might be zero */
84	AV *defav;	139	AV *defav;
85	SV *defsv;	140	SV *defsv;
86	SV *errsv;	141	SV *errsv;
87		142
88	/* saved global state not related to stacks */	143	#define VAR(name,type) type name;
89	U8 dowarn;	144	# include "state.h"
90	I32 in_eval;	145	#undef VAR
91		146
92	/* the stacks and related info (callchain etc..) */	147	/* coro process data */
93	PERL_SI *curstackinfo;	148	int prio;
94	AV *curstack;
95	AV *mainstack;
96	SV **stack_sp;
97	OP *op;
98	SV **curpad;
99	AV *comppad;
100	SV **stack_base;
101	SV **stack_max;
102	SV **tmps_stack;
103	I32 tmps_floor;
104	I32 tmps_ix;
105	I32 tmps_max;
106	I32 *markstack;
107	I32 *markstack_ptr;
108	I32 *markstack_max;
109	I32 *scopestack;
110	I32 scopestack_ix;
111	I32 scopestack_max;
112	ANY *savestack;
113	I32 savestack_ix;
114	I32 savestack_max;
115	OP **retstack;
116	I32 retstack_ix;
117	I32 retstack_max;
118	COP *curcop;
119	JMPENV *top_env;
120
121	/* data associated with this coroutine (initial args) */
122	AV *args;
123	};	149	};
124		150
125	typedef struct coro *Coro__State;	151	typedef struct coro *Coro__State;
126	typedef struct coro *Coro__State_or_hashref;	152	typedef struct coro *Coro__State_or_hashref;
127		153
128	static AV *main_mainstack; /* used to differentiate between $main and others */	154	static AV *
129	static HV *coro_state_stash;	155	coro_clone_padlist (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	{	156	{
139	AV *av;	157	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;	158	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		159
158	newpadlist = newAV ();	160	newpadlist = newAV ();
159	AvREAL_off (newpadlist);	161	AvREAL_off (newpadlist);
160	av_store (newpadlist, 0, (SV *) newpad_name);	162	#if PERL_VERSION_ATLEAST (5,9,0)
		163	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		164	#else
		165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		166	#endif
		167	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		168	--AvFILLp (padlist);
		169
		170	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
161	av_store (newpadlist, 1, (SV *) newpad);	171	av_store (newpadlist, 1, (SV *)newpad);
162		172
163	av = newAV (); /* will be @_ */	173	return newpadlist;
164	av_extend (av, 0);	174	}
165	av_store (newpad, 0, (SV *) av);
166	AvFLAGS (av) = AVf_REIFY;
167		175
168	for (ix = fpad; ix > 0; ix--)	176	static void
		177	free_padlist (AV *padlist)
		178	{
		179	/* may be during global destruction */
		180	if (SvREFCNT (padlist))
169	{	181	{
170	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	182	I32 i = AvFILLp (padlist);
171	if (namesv && namesv != &PL_sv_undef)	183	while (i >= 0)
172	{	184	{
173	char *name = SvPVX (namesv); /* XXX */	185	SV **svp = av_fetch (padlist, i--, FALSE);
174	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	186	if (svp)
175	{ /* lexical from outside? */
176	npad[ix] = SvREFCNT_inc (ppad[ix]);
177	}	187	{
178	else
179	{ /* our own lexical */
180	SV *sv;	188	SV *sv;
181	if (*name == '&')	189	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
182	sv = SvREFCNT_inc (ppad[ix]);	190	SvREFCNT_dec (sv);
183	else if (*name == '@')	191
184	sv = (SV *) newAV ();	192	SvREFCNT_dec (*svp);
185	else if (*name == '%')
186	sv = (SV *) newHV ();
187	else
188	sv = NEWSV (0, 0);
189	#ifdef SvPADBUSY
190	if (!SvPADBUSY (sv))
191	#endif
192	SvPADMY_on (sv);
193	npad[ix] = sv;
194	}	193	}
195	}	194	}
196	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	195
197	{	196	SvREFCNT_dec ((SV*)padlist);
198	npad[ix] = SvREFCNT_inc (ppad[ix]);
199	}
200	else
201	{
202	SV *sv = NEWSV (0, 0);
203	SvPADTMP_on (sv);
204	npad[ix] = sv;
205	}
206	}	197	}
		198	}
207		199
208	#if 0 /* return -ENOTUNDERSTOOD */	200	static int
209	/* Now that vars are all in place, clone nested closures. */	201	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		202	{
		203	AV *padlist;
		204	AV *av = (AV *)mg->mg_obj;
210		205
211	for (ix = fpad; ix > 0; ix--) {	206	/* casting is fun. */
212	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	207	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
213	if (namesv	208	free_padlist (padlist);
214	&& namesv != &PL_sv_undef	209
215	&& !(SvFLAGS(namesv) & SVf_FAKE)	210	SvREFCNT_dec (av);
216	&& *SvPVX(namesv) == '&'	211
217	&& CvCLONE(ppad[ix]))	212	return 0;
218	{	213	}
219	CV *kid = cv_clone((CV*)ppad[ix]);	214
220	SvREFCNT_dec(ppad[ix]);	215	#define PERL_MAGIC_coro PERL_MAGIC_ext
221	CvCLONE_on(kid);	216
222	SvPADMY_on(kid);	217	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
223	npad[ix] = (SV*)kid;	218
224	}	219	/* the next two functions merely cache the padlists */
		220	static void
		221	get_padlist (CV *cv)
		222	{
		223	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		224
		225	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
		226	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
		227	else
		228	{
		229	#if 0
		230	/* this is probably cleaner, but also slower? */
		231	CV *cp = Perl_cv_clone (cv);
		232	CvPADLIST (cv) = CvPADLIST (cp);
		233	CvPADLIST (cp) = 0;
		234	SvREFCNT_dec (cp);
		235	#else
		236	CvPADLIST (cv) = coro_clone_padlist (cv);
		237	#endif
		238	}
		239	}
		240
		241	static void
		242	put_padlist (CV *cv)
		243	{
		244	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		245
		246	if (!mg)
		247	{
		248	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		249	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		250	mg->mg_virtual = &vtbl_coro;
		251	mg->mg_obj = (SV *)newAV ();
225	}	252	}
226	#endif
227		253
228	return newpadlist;
229	}
230
231	#ifdef MAY_FLUSH
232	STATIC void
233	free_padlist (AV *padlist)
234	{
235	/* may be during global destruction */
236	if (SvREFCNT(padlist))
237	{
238	I32 i = AvFILLp(padlist);
239	while (i >= 0)
240	{
241	SV **svp = av_fetch(padlist, i--, FALSE);
242	SV *sv = svp ? *svp : Nullsv;
243	if (sv)
244	SvREFCNT_dec(sv);
245	}
246
247	SvREFCNT_dec((SV*)padlist);
248	}
249	}
250	#endif
251
252	/* the next two functions merely cache the padlists */
253	STATIC void
254	get_padlist (CV *cv)
255	{
256	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
257
258	if (he && AvFILLp ((AV *)*he) >= 0)
259	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
260	else
261	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
262	}
263
264	STATIC void
265	put_padlist (CV *cv)
266	{
267	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
268
269	if (SvTYPE (*he) != SVt_PVAV)
270	{
271	SvREFCNT_dec (*he);
272	*he = (SV *)newAV ();
273	}
274
275	av_push ((AV *)*he, (SV *)CvPADLIST (cv));	254	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
276	}	255	}
277
278	#ifdef MAY_FLUSH
279	STATIC void
280	flush_padlist_cache ()
281	{
282	HV *hv = padlist_cache;
283	padlist_cache = newHV ();
284
285	if (hv_iterinit (hv))
286	{
287	HE *he;
288	AV *padlist;
289
290	while (!!(he = hv_iternext (hv)))
291	{
292	AV *av = (AV *)HeVAL(he);
293
294	/* casting is fun. */
295	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
296	free_padlist (padlist);
297	}
298	}
299
300	SvREFCNT_dec (hv);
301	}
302	#endif
303		256
304	#define SB do {	257	#define SB do {
305	#define SE } while (0)	258	#define SE } while (0)
306		259
307	#define LOAD(state) load_state(aTHX_ (state));	260	#define LOAD(state) load_state((state));
308	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	261	#define SAVE(state,flags) save_state((state),(flags));
309		262
310	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	263	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
311		264
312	static void	265	static void
313	load_state(pTHX_ Coro__State c)	266	load_state(Coro__State c)
314	{	267	{
315	PL_dowarn = c->dowarn;	268	#define VAR(name,type) PL_ ## name = c->name;
316	PL_in_eval = c->in_eval;	269	# include "state.h"
317		270	#undef VAR
318	PL_curstackinfo = c->curstackinfo;
319	PL_curstack = c->curstack;
320	PL_mainstack = c->mainstack;
321	PL_stack_sp = c->stack_sp;
322	PL_op = c->op;
323	PL_curpad = c->curpad;
324	PL_comppad = c->comppad;
325	PL_stack_base = c->stack_base;
326	PL_stack_max = c->stack_max;
327	PL_tmps_stack = c->tmps_stack;
328	PL_tmps_floor = c->tmps_floor;
329	PL_tmps_ix = c->tmps_ix;
330	PL_tmps_max = c->tmps_max;
331	PL_markstack = c->markstack;
332	PL_markstack_ptr = c->markstack_ptr;
333	PL_markstack_max = c->markstack_max;
334	PL_scopestack = c->scopestack;
335	PL_scopestack_ix = c->scopestack_ix;
336	PL_scopestack_max = c->scopestack_max;
337	PL_savestack = c->savestack;
338	PL_savestack_ix = c->savestack_ix;
339	PL_savestack_max = c->savestack_max;
340	PL_retstack = c->retstack;
341	PL_retstack_ix = c->retstack_ix;
342	PL_retstack_max = c->retstack_max;
343	PL_curcop = c->curcop;
344	PL_top_env = c->top_env;
345		271
346	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	272	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
347	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	273	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
348	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	274	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
349		275
…		…
358		284
359	if (padlist)	285	if (padlist)
360	{	286	{
361	put_padlist (cv); /* mark this padlist as available */	287	put_padlist (cv); /* mark this padlist as available */
362	CvPADLIST(cv) = padlist;	288	CvPADLIST(cv) = padlist;
363	#ifdef USE_THREADS
364	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
365	#endif
366	}	289	}
367		290
368	++CvDEPTH(cv);	291	++CvDEPTH(cv);
369	}	292	}
370		293
371	PUTBACK;	294	PUTBACK;
372	}	295	}
373	}	296	}
374		297
375	static void	298	static void
376	save_state(pTHX_ Coro__State c, int flags)	299	save_state(Coro__State c, int flags)
377	{	300	{
378	{	301	{
379	dSP;	302	dSP;
380	I32 cxix = cxstack_ix;	303	I32 cxix = cxstack_ix;
381	PERL_CONTEXT *ccstk = cxstack;	304	PERL_CONTEXT *ccstk = cxstack;
…		…
397	if (CxTYPE(cx) == CXt_SUB)	320	if (CxTYPE(cx) == CXt_SUB)
398	{	321	{
399	CV *cv = cx->blk_sub.cv;	322	CV *cv = cx->blk_sub.cv;
400	if (CvDEPTH(cv))	323	if (CvDEPTH(cv))
401	{	324	{
402	#ifdef USE_THREADS
403	/*XPUSHs ((SV *)CvOWNER(cv));*/
404	/*CvOWNER(cv) = 0;*/
405	/*error must unlock this cv etc.. etc...*/
406	#endif
407	EXTEND (SP, CvDEPTH(cv)*2);	325	EXTEND (SP, CvDEPTH(cv)*2);
408		326
409	while (--CvDEPTH(cv))	327	while (--CvDEPTH(cv))
410	{	328	{
411	/* this tells the restore code to increment CvDEPTH */	329	/* this tells the restore code to increment CvDEPTH */
…		…
414	}	332	}
415		333
416	PUSHs ((SV *)CvPADLIST(cv));	334	PUSHs ((SV *)CvPADLIST(cv));
417	PUSHs ((SV *)cv);	335	PUSHs ((SV *)cv);
418		336
419	get_padlist (cv); /* this is a monster */	337	get_padlist (cv);
420	}	338	}
421	}	339	}
422	#ifdef CXt_FORMAT	340	#ifdef CXt_FORMAT
423	else if (CxTYPE(cx) == CXt_FORMAT)	341	else if (CxTYPE(cx) == CXt_FORMAT)
424	{	342	{
…		…
442		360
443	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	361	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
444	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	362	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
445	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	363	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
446		364
447	c->dowarn = PL_dowarn;	365	#define VAR(name,type)c->name = PL_ ## name;
448	c->in_eval = PL_in_eval;	366	# include "state.h"
449		367	#undef VAR
450	c->curstackinfo = PL_curstackinfo;
451	c->curstack = PL_curstack;
452	c->mainstack = PL_mainstack;
453	c->stack_sp = PL_stack_sp;
454	c->op = PL_op;
455	c->curpad = PL_curpad;
456	c->comppad = PL_comppad;
457	c->stack_base = PL_stack_base;
458	c->stack_max = PL_stack_max;
459	c->tmps_stack = PL_tmps_stack;
460	c->tmps_floor = PL_tmps_floor;
461	c->tmps_ix = PL_tmps_ix;
462	c->tmps_max = PL_tmps_max;
463	c->markstack = PL_markstack;
464	c->markstack_ptr = PL_markstack_ptr;
465	c->markstack_max = PL_markstack_max;
466	c->scopestack = PL_scopestack;
467	c->scopestack_ix = PL_scopestack_ix;
468	c->scopestack_max = PL_scopestack_max;
469	c->savestack = PL_savestack;
470	c->savestack_ix = PL_savestack_ix;
471	c->savestack_max = PL_savestack_max;
472	c->retstack = PL_retstack;
473	c->retstack_ix = PL_retstack_ix;
474	c->retstack_max = PL_retstack_max;
475	c->curcop = PL_curcop;
476	c->top_env = PL_top_env;
477	}	368	}
478		369
479	/*	370	/*
480	* allocate various perl stacks. This is an exact copy	371	* allocate various perl stacks. This is an exact copy
481	* of perl.c:init_stacks, except that it uses less memory	372	* of perl.c:init_stacks, except that it uses less memory
482	* on the assumption that coroutines do not usually need	373	* on the (sometimes correct) assumption that coroutines do
483	* a lot of stackspace.	374	* not usually need a lot of stackspace.
484	*/	375	*/
485	STATIC void	376	static void
486	coro_init_stacks (pTHX)	377	coro_init_stacks ()
487	{	378	{
488	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	379	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
489	PL_curstackinfo->si_type = PERLSI_MAIN;	380	PL_curstackinfo->si_type = PERLSI_MAIN;
490	PL_curstack = PL_curstackinfo->si_stack;	381	PL_curstack = PL_curstackinfo->si_stack;
491	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	382	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
513		404
514	New(54,PL_savestack,96,ANY);	405	New(54,PL_savestack,96,ANY);
515	PL_savestack_ix = 0;	406	PL_savestack_ix = 0;
516	PL_savestack_max = 96;	407	PL_savestack_max = 96;
517		408
		409	#if !PERL_VERSION_ATLEAST (5,9,0)
518	New(54,PL_retstack,8,OP*);	410	New(54,PL_retstack,8,OP*);
519	PL_retstack_ix = 0;	411	PL_retstack_ix = 0;
520	PL_retstack_max = 8;	412	PL_retstack_max = 8;
		413	#endif
521	}	414	}
522		415
523	/*	416	/*
524	* destroy the stacks, the callchain etc...	417	* destroy the stacks, the callchain etc...
525	*/	418	*/
526	STATIC void	419	static void
527	destroy_stacks(pTHX)	420	coro_destroy_stacks ()
528	{	421	{
529	if (!IN_DESTRUCT)	422	if (!IN_DESTRUCT)
530	{	423	{
531	/* is this ugly, I ask? */	424	/* is this ugly, I ask? */
532	while (PL_scopestack_ix)	425	LEAVE_SCOPE (0);
533	LEAVE;
534		426
535	/* sure it is, but more important: is it correct?? :/ */	427	/* sure it is, but more important: is it correct?? :/ */
536	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
537	FREETMPS;	428	FREETMPS;
		429
		430	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
538	}	431	}
539		432
540	while (PL_curstackinfo->si_next)	433	while (PL_curstackinfo->si_next)
541	PL_curstackinfo = PL_curstackinfo->si_next;	434	PL_curstackinfo = PL_curstackinfo->si_next;
542		435
543	while (PL_curstackinfo)	436	while (PL_curstackinfo)
544	{	437	{
545	PERL_SI *p = PL_curstackinfo->si_prev;	438	PERL_SI *p = PL_curstackinfo->si_prev;
546		439
547	{	440	{ /*D*//*remove*/
548	dSP;	441	dSP;
549	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	442	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
550	PUTBACK; /* possibly superfluous */	443	PUTBACK; /* possibly superfluous */
551	}	444	}
552		445
553	if (!IN_DESTRUCT)	446	if (!IN_DESTRUCT)
554	{	447	{
555	dounwind(-1);	448	dounwind (-1);/*D*//*remove*/
556	SvREFCNT_dec(PL_curstackinfo->si_stack);	449	SvREFCNT_dec (PL_curstackinfo->si_stack);
557	}	450	}
558		451
559	Safefree(PL_curstackinfo->si_cxstack);	452	Safefree (PL_curstackinfo->si_cxstack);
560	Safefree(PL_curstackinfo);	453	Safefree (PL_curstackinfo);
561	PL_curstackinfo = p;	454	PL_curstackinfo = p;
562	}	455	}
563		456
564	Safefree(PL_tmps_stack);	457	Safefree (PL_tmps_stack);
565	Safefree(PL_markstack);	458	Safefree (PL_markstack);
566	Safefree(PL_scopestack);	459	Safefree (PL_scopestack);
567	Safefree(PL_savestack);	460	Safefree (PL_savestack);
		461	#if !PERL_VERSION_ATLEAST (5,9,0)
568	Safefree(PL_retstack);	462	Safefree (PL_retstack);
569	}
570
571	static void
572	allocate_stack (Coro__State ctx, int alloc)
573	{
574	coro_stack *stack;
575
576	New (0, stack, 1, coro_stack);
577
578	stack->refcnt = 1;
579	stack->usecnt = 1;
580	stack->gencnt = ctx->gencnt = 0;
581	if (alloc)
582	{
583	#if HAVE_MMAP
584	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
585	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
586	if (stack->sptr == (void *)-1)
587	#endif	463	#endif
588	{
589	/*FIXME*//*D*//* reasonable stack size! */
590	stack->ssize = -4096 * sizeof (long);
591	New (0, stack->sptr, 4096, long);
592	}
593	}
594	else
595	stack->sptr = 0;
596
597	ctx->stack = stack;
598	}	464	}
599		465
600	static void	466	static void
601	deallocate_stack (Coro__State ctx)	467	setup_coro (struct coro *coro)
602	{
603	coro_stack *stack = ctx->stack;
604
605	ctx->stack = 0;
606
607	if (stack)
608	{
609	if (!--stack->refcnt)
610	{
611	#ifdef HAVE_MMAP
612	if (stack->ssize > 0 && stack->sptr)
613	munmap (stack->sptr, stack->ssize);
614	else
615	#endif
616	Safefree (stack->sptr);
617
618	Safefree (stack);
619	}
620	else if (ctx->gencnt == stack->gencnt)
621	--stack->usecnt;
622	}
623	}
624
625	static void
626	setup_coro (void *arg)
627	{	468	{
628	/*	469	/*
629	* emulate part of the perl startup here.	470	* emulate part of the perl startup here.
630	*/	471	*/
631	dSP;
632	Coro__State ctx = (Coro__State)arg;
633	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
634		472
635	coro_init_stacks (aTHX);	473	coro_init_stacks ();
		474
636	/*PL_curcop = 0;*/	475	PL_curcop = 0;
637	/*PL_in_eval = PL_in_eval;*/ /* inherit */	476	PL_in_eval = 0;
		477	PL_curpm = 0;
		478
		479	{
		480	dSP;
		481	LOGOP myop;
		482
		483	/* I have no idea why this is needed, but it is */
		484	PUSHMARK (SP);
		485
638	SvREFCNT_dec (GvAV (PL_defgv));	486	SvREFCNT_dec (GvAV (PL_defgv));
639	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	487	GvAV (PL_defgv) = coro->args; coro->args = 0;
640		488
641	SPAGAIN;
642
643	if (ctx->stack)
644	{
645	ctx->cursp = 0;
646
647	PUSHMARK(SP);
648	PUTBACK;
649	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
650
651	if (SvTRUE (ERRSV))
652	croak (NULL);
653	else
654	croak ("FATAL: CCTXT coroutine returned!");
655	}
656	else
657	{
658	UNOP myop;
659
660	PL_op = (OP *)&myop;
661
662	Zero(&myop, 1, UNOP);	489	Zero (&myop, 1, LOGOP);
663	myop.op_next = Nullop;	490	myop.op_next = Nullop;
664	myop.op_flags = OPf_WANT_VOID;	491	myop.op_flags = OPf_WANT_VOID;
665		492
		493	PL_op = (OP *)&myop;
		494
666	PUSHMARK(SP);	495	PUSHMARK (SP);
667	XPUSHs (sub_init);	496	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
668	/*
669	* the next line is slightly wrong, as PL_op->op_next
670	* is actually being executed so we skip the first op.
671	* that doesn't matter, though, since it is only
672	* pp_nextstate and we never return...
673	* ah yes, and I don't care anyways ;)
674	*/
675	PUTBACK;	497	PUTBACK;
676	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	498	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
677	SPAGAIN;	499	SPAGAIN;
678		500
679	ENTER; /* necessary e.g. for dounwind */	501	ENTER; /* necessary e.g. for dounwind */
680	}	502	}
681	}	503	}
682		504
683	static void	505	static void
684	continue_coro (void *arg)	506	free_coro_mortal ()
685	{	507	{
686	/*
687	* this is a _very_ stripped down perl interpreter ;)
688	*/
689	Coro__State ctx = (Coro__State)arg;
690	JMPENV coro_start_env;
691
692	PL_top_env = &ctx->start_env;
693
694	ctx->cursp = 0;
695	PL_op = PL_op->op_next;
696	CALLRUNOPS(aTHX);
697
698	abort ();
699	}
700
701	STATIC void
702	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
703	{
704	dSTACKLEVEL;
705	static struct coro *xnext;
706
707	if (prev != next)
708	{
709	xnext = next;
710
711	if (next->mainstack)
712	{
713	SAVE (prev, flags);
714	LOAD (next);
715
716	/* mark this state as in-use */
717	next->mainstack = 0;
718	next->tmps_ix = -2;
719
720	/* stacklevel changed? if yes, grab the stack for us! */
721	if (flags & TRANSFER_SAVE_CCTXT)
722	{
723	if (!prev->stack)
724	allocate_stack (prev, 0);
725	else if (prev->cursp != stacklevel
726	&& prev->stack->usecnt > 1)
727	{
728	prev->gencnt = ++prev->stack->gencnt;
729	prev->stack->usecnt = 1;
730	}
731
732	/* has our stack been invalidated? */
733	if (next->stack && next->stack->gencnt != next->gencnt)
734	{
735	deallocate_stack (next);
736	allocate_stack (next, 1);
737	coro_create (&(next->stack->cctx),
738	continue_coro, (void *)next,
739	next->stack->sptr, labs (next->stack->ssize));
740	}
741
742	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743	/* don't add any code here */
744	}
745
746	}
747	else if (next->tmps_ix == -2)
748	croak ("tried to transfer to running coroutine");
749	else
750	{
751	SAVE (prev, -1); /* first get rid of the old state */
752
753	if (flags & TRANSFER_SAVE_CCTXT)
754	{
755	if (!prev->stack)
756	allocate_stack (prev, 0);
757
758	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
759	{
760	PL_top_env = &next->start_env;
761
762	setup_coro (next);
763
764	prev->stack->refcnt++;
765	prev->stack->usecnt++;
766	next->stack = prev->stack;
767	next->gencnt = prev->gencnt;
768	}
769	else
770	{
771	assert (!next->stack);
772	allocate_stack (next, 1);
773	coro_create (&(next->stack->cctx),
774	setup_coro, (void *)next,
775	next->stack->sptr, labs (next->stack->ssize));
776	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
777	/* don't add any code here */
778	}
779	}
780	else
781	setup_coro (next);
782	}
783
784	/*
785	* xnext is now either prev or next, depending on wether
786	* we switched the c stack or not. that's why I use a global
787	* variable, that should become thread-specific at one point.
788	*/
789	xnext->cursp = stacklevel;
790	}
791
792	if (coro_mortal)	508	if (coro_mortal)
793	{	509	{
794	SvREFCNT_dec (coro_mortal);	510	SvREFCNT_dec (coro_mortal);
795	coro_mortal = 0;	511	coro_mortal = 0;
796	}	512	}
797	}	513	}
798		514
799	#define SV_CORO(sv,func) \	515	static void NOINLINE
800	do { \	516	prepare_cctx (coro_cctx *cctx)
801	if (SvROK (sv)) \	517	{
802	sv = SvRV (sv); \	518	dSP;
803	\	519	LOGOP myop;
804	if (SvTYPE(sv) == SVt_PVHV) \
805	{ \
806	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
807	\
808	if (!he) \
809	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
810	\
811	(sv) = SvRV (HeVAL(he)); \
812	} \
813	\
814	/* must also be changed inside Coro::Cont::yield */ \
815	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
816	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
817	\
818	} while(0)
819		520
820	#define SvSTATE(sv) (struct coro *)SvIV (sv)	521	Zero (&myop, 1, LOGOP);
		522	myop.op_next = PL_op;
		523	myop.op_flags = OPf_WANT_VOID;
821		524
		525	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		526
		527	PUSHMARK (SP);
		528	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		529	PUTBACK;
		530	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		531	SPAGAIN;
		532	}
		533
		534	static void
		535	coro_run (void *arg)
		536	{
		537	/* coro_run is the alternative epilogue of transfer() */
		538	UNLOCK;
		539
		540	/*
		541	* this is a _very_ stripped down perl interpreter ;)
		542	*/
		543	PL_top_env = &PL_start_env;
		544
		545	/* inject call to cctx_init */
		546	prepare_cctx ((coro_cctx *)arg);
		547
		548	/* somebody will hit me for both perl_run and PL_restartop */
		549	perl_run (PL_curinterp);
		550
		551	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		552	abort ();
		553	}
		554
		555	static coro_cctx *
		556	cctx_new ()
		557	{
		558	coro_cctx *cctx;
		559
		560	++cctx_count;
		561
		562	New (0, cctx, 1, coro_cctx);
		563
		564	#if HAVE_MMAP
		565
		566	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		567	/* mmap suppsedly does allocate-on-write for us */
		568	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		569
		570	if (cctx->sptr == (void *)-1)
		571	{
		572	perror ("FATAL: unable to mmap stack for coroutine");
		573	_exit (EXIT_FAILURE);
		574	}
		575
		576	# if STACKGUARD
		577	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		578	# endif
		579
		580	#else
		581
		582	cctx->ssize = STACKSIZE * (long)sizeof (long);
		583	New (0, cctx->sptr, STACKSIZE, long);
		584
		585	if (!cctx->sptr)
		586	{
		587	perror ("FATAL: unable to malloc stack for coroutine");
		588	_exit (EXIT_FAILURE);
		589	}
		590
		591	#endif
		592
		593	#if USE_VALGRIND
		594	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		595	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		596	cctx->ssize + (char *)cctx->sptr
		597	);
		598	#endif
		599
		600	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		601
		602	return cctx;
		603	}
		604
		605	static void
		606	cctx_free (coro_cctx *cctx)
		607	{
		608	if (!cctx)
		609	return;
		610
		611	--cctx_count;
		612
		613	#if USE_VALGRIND
		614	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		615	#endif
		616
		617	#if HAVE_MMAP
		618	munmap (cctx->sptr, cctx->ssize);
		619	#else
		620	Safefree (cctx->sptr);
		621	#endif
		622
		623	Safefree (cctx);
		624	}
		625
		626	static coro_cctx *
		627	cctx_get ()
		628	{
		629	coro_cctx *cctx;
		630
		631	if (cctx_first)
		632	{
		633	--cctx_idle;
		634	cctx = cctx_first;
		635	cctx_first = cctx->next;
		636	}
		637	else
		638	{
		639	cctx = cctx_new ();
		640	PL_op = PL_op->op_next;
		641	}
		642
		643	return cctx;
		644	}
		645
		646	static void
		647	cctx_put (coro_cctx *cctx)
		648	{
		649	++cctx_idle;
		650	cctx->next = cctx_first;
		651	cctx_first = cctx;
		652	}
		653
		654	/* never call directly, always through the coro_state_transfer global variable */
		655	static void NOINLINE
		656	transfer (struct coro *prev, struct coro *next, int flags)
		657	{
		658	dSTACKLEVEL;
		659
		660	/* sometimes transfer is only called to set idle_sp */
		661	if (flags == TRANSFER_SET_STACKLEVEL)
		662	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		663	else if (prev != next)
		664	{
		665	coro_cctx *prev__cctx;
		666
		667	LOCK;
		668
		669	if (next->mainstack)
		670	{
		671	/* coroutine already started */
		672	SAVE (prev, flags);
		673	LOAD (next);
		674	}
		675	else
		676	{
		677	/* need to start coroutine */
		678	/* first get rid of the old state */
		679	SAVE (prev, -1);
		680	/* setup coroutine call */
		681	setup_coro (next);
		682	/* need a stack */
		683	next->cctx = 0;
		684	}
		685
		686	if (!prev->cctx)
		687	/* create a new empty context */
		688	Newz (0, prev->cctx, 1, coro_cctx);
		689
		690	prev__cctx = prev->cctx;
		691
		692	/* possibly "free" the cctx */
		693	if (prev__cctx->idle_sp == STACKLEVEL)
		694	{
		695	cctx_put (prev__cctx);
		696	prev->cctx = 0;
		697	}
		698
		699	if (!next->cctx)
		700	next->cctx = cctx_get ();
		701
		702	if (prev__cctx != next->cctx)
		703	{
		704	prev__cctx->top_env = PL_top_env;
		705	PL_top_env = next->cctx->top_env;
		706	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		707	}
		708
		709	free_coro_mortal ();
		710
		711	UNLOCK;
		712	}
		713	}
		714
		715	struct transfer_args
		716	{
		717	struct coro *prev, *next;
		718	int flags;
		719	};
		720
		721	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		722
		723	static void
		724	coro_state_destroy (struct coro *coro)
		725	{
		726	if (coro->refcnt--)
		727	return;
		728
		729	if (coro->mainstack && coro->mainstack != main_mainstack)
		730	{
		731	struct coro temp;
		732
		733	SAVE ((&temp), TRANSFER_SAVE_ALL);
		734	LOAD (coro);
		735
		736	coro_destroy_stacks ();
		737
		738	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		739
		740	coro->mainstack = 0;
		741	}
		742
		743	cctx_free (coro->cctx);
		744	SvREFCNT_dec (coro->args);
		745	Safefree (coro);
		746	}
		747
822	static void	748	static int
		749	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		750	{
		751	struct coro *coro = (struct coro *)mg->mg_ptr;
		752	mg->mg_ptr = 0;
		753
		754	coro_state_destroy (coro);
		755
		756	return 0;
		757	}
		758
		759	static int
		760	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		761	{
		762	struct coro *coro = (struct coro *)mg->mg_ptr;
		763
		764	++coro->refcnt;
		765
		766	return 0;
		767	}
		768
		769	static MGVTBL coro_state_vtbl = {
		770	0, 0, 0, 0,
		771	coro_state_clear,
		772	0,
		773	#ifdef MGf_DUP
		774	coro_state_dup,
		775	#else
		776	# define MGf_DUP 0
		777	#endif
		778	};
		779
		780	static struct coro *
		781	SvSTATE (SV *coro)
		782	{
		783	HV *stash;
		784	MAGIC *mg;
		785
		786	if (SvROK (coro))
		787	coro = SvRV (coro);
		788
		789	stash = SvSTASH (coro);
		790	if (stash != coro_stash && stash != coro_state_stash)
		791	{
		792	/* very slow, but rare, check */
		793	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		794	croak ("Coro::State object required");
		795	}
		796
		797	mg = SvMAGIC (coro);
		798	assert (mg->mg_type == PERL_MAGIC_ext);
		799	return (struct coro *)mg->mg_ptr;
		800	}
		801
		802	static void
		803	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		804	{
		805	ta->prev = SvSTATE (prev);
		806	ta->next = SvSTATE (next);
		807	ta->flags = flags;
		808	}
		809
		810	static void
823	api_transfer(pTHX_ SV *prev, SV *next, int flags)	811	api_transfer (SV *prev, SV *next, int flags)
824	{	812	{
825	SV_CORO (prev, "Coro::transfer");	813	dTHX;
826	SV_CORO (next, "Coro::transfer");	814	struct transfer_args ta;
827		815
828	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	816	prepare_transfer (&ta, prev, next, flags);
		817	TRANSFER (ta);
829	}	818	}
830		819
831	/** Coro ********************************************************************/	820	/** Coro ********************************************************************/
832		821
833	#define PRIO_MAX 3	822	#define PRIO_MAX 3
…		…
837	#define PRIO_IDLE -3	826	#define PRIO_IDLE -3
838	#define PRIO_MIN -4	827	#define PRIO_MIN -4
839		828
840	/* for Coro.pm */	829	/* for Coro.pm */
841	static GV *coro_current, *coro_idle;	830	static GV *coro_current, *coro_idle;
842	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	831	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
843	static int coro_nready;	832	static int coro_nready;
844		833
845	static void	834	static void
846	coro_enq (SV *sv)	835	coro_enq (SV *sv)
847	{	836	{
		837	int prio;
		838
848	if (SvTYPE (sv) == SVt_PVHV)	839	if (SvTYPE (sv) != SVt_PVHV)
849	{
850	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
851	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
852
853	prio = prio > PRIO_MAX ? PRIO_MAX
854	: prio < PRIO_MIN ? PRIO_MIN
855	: prio;
856
857	av_push (coro_ready [prio - PRIO_MIN], sv);
858	coro_nready++;
859
860	return;
861	}
862
863	croak ("Coro::ready tried to enqueue something that is not a coroutine");	840	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		841
		842	prio = SvSTATE (sv)->prio;
		843
		844	av_push (coro_ready [prio - PRIO_MIN], sv);
		845	coro_nready++;
864	}	846	}
865		847
866	static SV *	848	static SV *
867	coro_deq (int min_prio)	849	coro_deq (int min_prio)
868	{	850	{
…		…
871	min_prio -= PRIO_MIN;	853	min_prio -= PRIO_MIN;
872	if (min_prio < 0)	854	if (min_prio < 0)
873	min_prio = 0;	855	min_prio = 0;
874		856
875	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	857	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
876	if (av_len (coro_ready[prio]) >= 0)	858	if (AvFILLp (coro_ready [prio]) >= 0)
877	{	859	{
878	coro_nready--;	860	coro_nready--;
879	return av_shift (coro_ready[prio]);	861	return av_shift (coro_ready [prio]);
880	}	862	}
881		863
882	return 0;	864	return 0;
883	}	865	}
884		866
885	static void	867	static void
886	api_ready (SV *coro)	868	api_ready (SV *coro)
887	{	869	{
		870	dTHX;
		871
888	if (SvROK (coro))	872	if (SvROK (coro))
889	coro = SvRV (coro);	873	coro = SvRV (coro);
890		874
		875	LOCK;
891	coro_enq (SvREFCNT_inc (coro));	876	coro_enq (SvREFCNT_inc (coro));
		877	UNLOCK;
		878	}
		879
		880	static void
		881	prepare_schedule (struct transfer_args *ta)
		882	{
		883	SV *current, *prev, *next;
		884
		885	current = GvSV (coro_current);
		886
		887	for (;;)
		888	{
		889	LOCK;
		890	next = coro_deq (PRIO_MIN);
		891	UNLOCK;
		892
		893	if (next)
		894	break;
		895
		896	{
		897	dSP;
		898
		899	ENTER;
		900	SAVETMPS;
		901
		902	PUSHMARK (SP);
		903	PUTBACK;
		904	call_sv (GvSV (coro_idle), G_DISCARD);
		905
		906	FREETMPS;
		907	LEAVE;
		908	}
		909	}
		910
		911	prev = SvRV (current);
		912	SvRV (current) = next;
		913
		914	/* free this only after the transfer */
		915	LOCK;
		916	free_coro_mortal ();
		917	UNLOCK;
		918	coro_mortal = prev;
		919
		920	ta->prev = SvSTATE (prev);
		921	ta->next = SvSTATE (next);
		922	ta->flags = TRANSFER_SAVE_ALL;
		923	}
		924
		925	static void
		926	prepare_cede (struct transfer_args *ta)
		927	{
		928	LOCK;
		929	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		930	UNLOCK;
		931
		932	prepare_schedule (ta);
892	}	933	}
893		934
894	static void	935	static void
895	api_schedule (void)	936	api_schedule (void)
896	{	937	{
897	SV *prev, *next;	938	dTHX;
		939	struct transfer_args ta;
898		940
899	prev = SvRV (GvSV (coro_current));	941	prepare_schedule (&ta);
900	next = coro_deq (PRIO_MIN);	942	TRANSFER (ta);
901
902	if (!next)
903	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
904
905	/* free this only after the transfer */
906	coro_mortal = prev;
907	SV_CORO (prev, "Coro::schedule");
908
909	SvRV (GvSV (coro_current)) = next;
910
911	SV_CORO (next, "Coro::schedule");
912
913	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
914	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
915	}	943	}
916		944
917	static void	945	static void
918	api_cede (void)	946	api_cede (void)
919	{	947	{
920	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	948	dTHX;
		949	struct transfer_args ta;
921		950
922	api_schedule ();	951	prepare_cede (&ta);
		952	TRANSFER (ta);
923	}	953	}
924		954
925	MODULE = Coro::State PACKAGE = Coro::State	955	MODULE = Coro::State PACKAGE = Coro::State
926		956
927	PROTOTYPES: ENABLE	957	PROTOTYPES: DISABLE
928		958
929	BOOT:	959	BOOT:
930	{ /* {} necessary for stoopid perl-5.6.x */	960	{
931	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	961	#ifdef USE_ITHREADS
932	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	962	MUTEX_INIT (&coro_mutex);
		963	#endif
		964	BOOT_PAGESIZE;
		965
933	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	966	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
934		967
935	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	968	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
936	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	969	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
937	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	970	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
938	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
939
940	if (!padlist_cache)
941	padlist_cache = newHV ();
942		971
943	main_mainstack = PL_mainstack;	972	main_mainstack = PL_mainstack;
944		973
945	coroapi.ver = CORO_API_VERSION;	974	coroapi.ver = CORO_API_VERSION;
946	coroapi.transfer = api_transfer;	975	coroapi.transfer = api_transfer;
947	}
948		976
949	Coro::State	977	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
950	_newprocess(args)	978	}
951	SV * args	979
952	PROTOTYPE: $	980	SV *
		981	new (char *klass, ...)
953	CODE:	982	CODE:
954	Coro__State coro;	983	{
		984	struct coro *coro;
		985	HV *hv;
		986	int i;
955		987
956	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
957	croak ("Coro::State::_newprocess expects an arrayref");
958
959	Newz (0, coro, 1, struct coro);	988	Newz (0, coro, 1, struct coro);
		989	coro->args = newAV ();
960		990
961	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	991	hv = newHV ();
962	coro->mainstack = 0; /* actual work is done inside transfer */	992	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
963	coro->stack = 0;	993	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
964		994
965	/* same as JMPENV_BOOTSTRAP */	995	for (i = 1; i < items; i++)
966	/* we might be able to recycle start_env, but safe is safe */	996	av_push (coro->args, newSVsv (ST (i)));
967	//Zero(&coro->start_env, 1, JMPENV);	997	}
968	coro->start_env.je_ret = -1;
969	coro->start_env.je_mustcatch = TRUE;
970
971	RETVAL = coro;
972	OUTPUT:	998	OUTPUT:
973	RETVAL	999	RETVAL
974		1000
975	void	1001	void
976	transfer(prev, next, flags)	1002	_set_stacklevel (...)
977	SV *prev	1003	ALIAS:
978	SV *next	1004	Coro::State::transfer = 1
979	int flags	1005	Coro::schedule = 2
980	PROTOTYPE: @	1006	Coro::cede = 3
		1007	Coro::Cont::yield = 4
981	CODE:	1008	CODE:
982	PUTBACK;	1009	{
983	SV_CORO (next, "Coro::transfer");	1010	struct transfer_args ta;
984	SV_CORO (prev, "Coro::transfer");	1011
985	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1012	switch (ix)
986	SPAGAIN;	1013	{
		1014	case 0:
		1015	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1016	ta.next = 0;
		1017	ta.flags = TRANSFER_SET_STACKLEVEL;
		1018	break;
		1019
		1020	case 1:
		1021	if (items != 3)
		1022	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1023
		1024	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1025	break;
		1026
		1027	case 2:
		1028	prepare_schedule (&ta);
		1029	break;
		1030
		1031	case 3:
		1032	prepare_cede (&ta);
		1033	break;
		1034
		1035	case 4:
		1036	{
		1037	SV *yieldstack;
		1038	SV *sv;
		1039	AV *defav = GvAV (PL_defgv);
		1040
		1041	yieldstack = *hv_fetch (
		1042	(HV *)SvRV (GvSV (coro_current)),
		1043	"yieldstack", sizeof ("yieldstack") - 1,
		1044	0
		1045	);
		1046
		1047	/* set up @_ -- ugly */
		1048	av_clear (defav);
		1049	av_fill (defav, items - 1);
		1050	while (items--)
		1051	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1052
		1053	sv = av_pop ((AV *)SvRV (yieldstack));
		1054	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1055	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1056	ta.flags = 0;
		1057	SvREFCNT_dec (sv);
		1058	}
		1059	break;
		1060
		1061	}
		1062
		1063	TRANSFER (ta);
		1064	}
987		1065
988	void	1066	void
989	DESTROY(coro)	1067	_clone_state_from (SV *dst, SV *src)
990	Coro::State coro	1068	CODE:
991	CODE:	1069	{
		1070	struct coro *coro_src = SvSTATE (src);
992		1071
993	if (coro->mainstack && coro->mainstack != main_mainstack)	1072	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
994	{
995	struct coro temp;
996		1073
997	PUTBACK;	1074	++coro_src->refcnt;
998	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1075	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
999	LOAD(aTHX_ coro);	1076	}
1000	SPAGAIN;
1001
1002	destroy_stacks (aTHX);
1003
1004	LOAD((&temp)); /* this will get rid of defsv etc.. */
1005	SPAGAIN;
1006
1007	coro->mainstack = 0;
1008	}
1009
1010	deallocate_stack (coro);
1011	SvREFCNT_dec (coro->args);
1012	Safefree (coro);
1013		1077
1014	void	1078	void
1015	flush()
1016	CODE:
1017	#ifdef MAY_FLUSH
1018	flush_padlist_cache ();
1019	#endif
1020
1021	void
1022	_exit(code)	1079	_exit (code)
1023	int code	1080	int code
1024	PROTOTYPE: $	1081	PROTOTYPE: $
1025	CODE:	1082	CODE:
1026	#if defined(__GLIBC__) || _POSIX_C_SOURCE
1027	_exit (code);	1083	_exit (code);
1028	#else
1029	signal (SIGTERM, SIG_DFL);
1030	raise (SIGTERM);
1031	exit (code);
1032	#endif
1033		1084
1034	MODULE = Coro::State PACKAGE = Coro::Cont	1085	int
		1086	cctx_count ()
		1087	CODE:
		1088	RETVAL = cctx_count;
		1089	OUTPUT:
		1090	RETVAL
1035		1091
1036	# this is slightly dirty (should expose a c-level api)	1092	int
1037		1093	cctx_idle ()
1038	void	1094	CODE:
1039	yield(...)	1095	RETVAL = cctx_idle;
1040	PROTOTYPE: @	1096	OUTPUT:
1041	CODE:	1097	RETVAL
1042	static SV *returnstk;
1043	SV *sv;
1044	AV *defav = GvAV (PL_defgv);
1045	struct coro *prev, *next;
1046
1047	if (!returnstk)
1048	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1049
1050	/* set up @_ -- ugly */
1051	av_clear (defav);
1052	av_fill (defav, items - 1);
1053	while (items--)
1054	av_store (defav, items, SvREFCNT_inc (ST(items)));
1055
1056	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1057	sv = av_pop ((AV *)SvRV (returnstk));
1058	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1059	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1060	SvREFCNT_dec (sv);
1061
1062	transfer(aTHX_ prev, next, 0);
1063		1098
1064	MODULE = Coro::State PACKAGE = Coro	1099	MODULE = Coro::State PACKAGE = Coro
1065		1100
1066	# this is slightly dirty (should expose a c-level api)
1067
1068	BOOT:	1101	BOOT:
1069	{	1102	{
1070	int i;	1103	int i;
		1104
1071	HV *stash = gv_stashpv ("Coro", TRUE);	1105	coro_stash = gv_stashpv ("Coro", TRUE);
1072		1106
1073	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1107	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1074	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1108	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1075	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1109	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1076	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1110	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1077	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1111	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1078	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1112	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1079		1113
1080	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1114	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1081	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1115	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1082		1116
1083	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1117	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1091	coroapi.ready = api_ready;	1125	coroapi.ready = api_ready;
1092	coroapi.nready = &coro_nready;	1126	coroapi.nready = &coro_nready;
1093	coroapi.current = coro_current;	1127	coroapi.current = coro_current;
1094		1128
1095	GCoroAPI = &coroapi;	1129	GCoroAPI = &coroapi;
1096	sv_setiv(sv, (IV)&coroapi);	1130	sv_setiv (sv, (IV)&coroapi);
1097	SvREADONLY_on(sv);	1131	SvREADONLY_on (sv);
1098	}	1132	}
1099	}	1133	}
1100		1134
		1135	int
		1136	prio (Coro::State coro, int newprio = 0)
		1137	ALIAS:
		1138	nice = 1
		1139	CODE:
		1140	{
		1141	RETVAL = coro->prio;
		1142
		1143	if (items > 1)
		1144	{
		1145	if (ix)
		1146	newprio += coro->prio;
		1147
		1148	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1149	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1150
		1151	coro->prio = newprio;
		1152	}
		1153	}
		1154
1101	void	1155	void
1102	ready(self)	1156	ready (SV *self)
1103	SV * self
1104	PROTOTYPE: $	1157	PROTOTYPE: $
1105	CODE:	1158	CODE:
1106	api_ready (self);	1159	api_ready (self);
1107		1160
1108	int	1161	int
1109	nready(...)	1162	nready (...)
1110	PROTOTYPE:	1163	PROTOTYPE:
1111	CODE:	1164	CODE:
1112	RETVAL = coro_nready;	1165	RETVAL = coro_nready;
1113	OUTPUT:	1166	OUTPUT:
1114	RETVAL	1167	RETVAL
1115		1168
		1169	MODULE = Coro::State PACKAGE = Coro::AIO
		1170
		1171	SV *
		1172	_get_state ()
		1173	CODE:
		1174	{
		1175	struct {
		1176	int errorno;
		1177	int laststype;
		1178	int laststatval;
		1179	Stat_t statcache;
		1180	} data;
		1181
		1182	data.errorno = errno;
		1183	data.laststype = PL_laststype;
		1184	data.laststatval = PL_laststatval;
		1185	data.statcache = PL_statcache;
		1186
		1187	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1188	}
		1189	OUTPUT:
		1190	RETVAL
		1191
1116	void	1192	void
1117	schedule(...)	1193	_set_state (char *data_)
1118	PROTOTYPE:	1194	PROTOTYPE: $
1119	CODE:	1195	CODE:
1120	api_schedule ();	1196	{
		1197	struct {
		1198	int errorno;
		1199	int laststype;
		1200	int laststatval;
		1201	Stat_t statcache;
		1202	} *data = (void *)data_;
1121		1203
1122	void	1204	errno = data->errorno;
1123	cede(...)	1205	PL_laststype = data->laststype;
1124	PROTOTYPE:	1206	PL_laststatval = data->laststatval;
1125	CODE:	1207	PL_statcache = data->statcache;
1126	api_cede ();	1208	}
1127

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