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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.70 by root, Mon Dec 26 19:26:52 2005 UTC vs.
Revision 1.111 by root, Thu Nov 30 18:21:14 2006 UTC

1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	#if PERL_VERSION < 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)
12	# ifndef PL_ppaddr	20	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	21	# define PL_ppaddr ppaddr
14	# endif	22	# endif
15	# ifndef call_sv	23	# ifndef call_sv
16	# define call_sv perl_call_sv	24	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	35	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	36	# define IS_PADCONST(v) 0
29	# endif	37	# endif
30	#endif	38	#endif
31		39
		40	#include <stdio.h>
32	#include <errno.h>	41	#include <errno.h>
33	#include <signal.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
34		50
35	#ifdef HAVE_MMAP	51	#ifdef HAVE_MMAP
36	# include <unistd.h>	52	# include <unistd.h>
37	# include <sys/mman.h>	53	# include <sys/mman.h>
38	# ifndef MAP_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
…		…
40	# define MAP_ANONYMOUS MAP_ANON	56	# define MAP_ANONYMOUS MAP_ANON
41	# else	57	# else
42	# undef HAVE_MMAP	58	# undef HAVE_MMAP
43	# endif	59	# endif
44	# 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
45	#endif	68	# endif
46		69	#else
47	#define SUB_INIT "Coro::State::initialize"	70	# define PAGESIZE 0
48	#define UCORO_STATE "_coro_state"	71	# define BOOT_PAGESIZE (void)0
		72	#endif
49		73
50	/* 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
51	* 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
52	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
53	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
54		79
55	#define IN_DESTRUCT (PL_main_cv == Nullcv)	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
56		81
57	#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))
58		89
59	#include "CoroAPI.h"	90	#include "CoroAPI.h"
		91
		92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
60		93
61	#ifdef USE_ITHREADS	94	#ifdef USE_ITHREADS
62	static perl_mutex coro_mutex;	95	static perl_mutex coro_mutex;
63	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
64	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
67	# define UNLOCK (void)0	100	# define UNLOCK (void)0
68	#endif	101	#endif
69		102
70	static struct CoroAPI coroapi;	103	static struct CoroAPI coroapi;
71	static AV *main_mainstack; /* used to differentiate between $main and others */	104	static AV *main_mainstack; /* used to differentiate between $main and others */
72	static HV *coro_state_stash;	105	static HV *coro_state_stash, *coro_stash;
73	static SV *ucoro_state_sv;
74	static U32 ucoro_state_hash;
75	static SV *coro_mortal; /* will be freed after next transfer */	106	static SV *coro_mortal; /* will be freed after next transfer */
76		107
77	/* 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 */
78	typedef struct {	112	typedef struct coro_cctx {
79	int refcnt; /* pointer reference counter */	113	struct coro_cctx *next;
80	int usecnt; /* shared by how many coroutines */
81	int gencnt; /* generation counter */
82		114
83	coro_context cctx;	115	/* the stack */
84
85	void *sptr;	116	void *sptr;
86	long ssize; /* positive == mmap, otherwise malloc */	117	long ssize; /* positive == mmap, otherwise malloc */
87	} coro_stack;
88		118
		119	/* cpu state */
		120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		121	JMPENV *top_env;
		122	coro_context cctx;
		123
		124	int inuse;
		125
		126	#if USE_VALGRIND
		127	int valgrind_id;
		128	#endif
		129	} coro_cctx;
		130
		131	enum {
		132	CF_RUNNING, /* coroutine is running */
		133	CF_READY, /* coroutine is ready */
		134	};
		135
		136	/* this is a structure representing a perl-level coroutine */
89	struct coro {	137	struct coro {
90	/* the top-level JMPENV for each coroutine, needed to catch dies. */	138	/* the c coroutine allocated to this perl coroutine, if any */
91	JMPENV start_env;	139	coro_cctx *cctx;
92		140
93	/* the optional C context */	141	/* data associated with this coroutine (initial args) */
94	coro_stack *stack;	142	AV *args;
95	void *cursp;
96	int gencnt;	143	int refcnt;
		144	int flags;
97		145
98	/* optionally saved, might be zero */	146	/* optionally saved, might be zero */
99	AV *defav;	147	AV *defav;
100	SV *defsv;	148	SV *defsv;
101	SV *errsv;	149	SV *errsv;
102		150
103	/* saved global state not related to stacks */	151	#define VAR(name,type) type name;
104	U8 dowarn;	152	# include "state.h"
105	I32 in_eval;	153	#undef VAR
106		154
107	/* the stacks and related info (callchain etc..) */	155	/* coro process data */
108	PERL_SI *curstackinfo;	156	int prio;
109	AV *curstack;
110	AV *mainstack;
111	SV **stack_sp;
112	OP *op;
113	SV **curpad;
114	AV *comppad;
115	CV *compcv;
116	SV **stack_base;
117	SV **stack_max;
118	SV **tmps_stack;
119	I32 tmps_floor;
120	I32 tmps_ix;
121	I32 tmps_max;
122	I32 *markstack;
123	I32 *markstack_ptr;
124	I32 *markstack_max;
125	I32 *scopestack;
126	I32 scopestack_ix;
127	I32 scopestack_max;
128	ANY *savestack;
129	I32 savestack_ix;
130	I32 savestack_max;
131	OP **retstack;
132	I32 retstack_ix;
133	I32 retstack_max;
134	PMOP *curpm;
135	COP *curcop;
136	JMPENV *top_env;
137
138	/* data associated with this coroutine (initial args) */
139	AV *args;
140	};	157	};
141		158
142	typedef struct coro *Coro__State;	159	typedef struct coro *Coro__State;
143	typedef struct coro *Coro__State_or_hashref;	160	typedef struct coro *Coro__State_or_hashref;
144		161
145	/* mostly copied from op.c:cv_clone2 */	162	static AV *
146	STATIC AV *	163	coro_clone_padlist (CV *cv)
147	clone_padlist (pTHX_ AV *protopadlist)
148	{	164	{
149	AV *av;	165	AV *padlist = CvPADLIST (cv);
150	I32 ix;
151	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
152	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
153	SV **pname = AvARRAY (protopad_name);
154	SV **ppad = AvARRAY (protopad);
155	I32 fname = AvFILLp (protopad_name);
156	I32 fpad = AvFILLp (protopad);
157	AV *newpadlist, *newpad_name, *newpad;	166	AV *newpadlist, *newpad;
158	SV **npad;
159
160	newpad_name = newAV ();
161	for (ix = fname; ix >= 0; ix--)
162	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
163
164	newpad = newAV ();
165	av_fill (newpad, AvFILLp (protopad));
166	npad = AvARRAY (newpad);
167		167
168	newpadlist = newAV ();	168	newpadlist = newAV ();
169	AvREAL_off (newpadlist);	169	AvREAL_off (newpadlist);
170	av_store (newpadlist, 0, (SV *) newpad_name);	170	#if PERL_VERSION_ATLEAST (5,9,0)
		171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		172	#else
		173	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		174	#endif
		175	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		176	--AvFILLp (padlist);
		177
		178	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
171	av_store (newpadlist, 1, (SV *) newpad);	179	av_store (newpadlist, 1, (SV *)newpad);
172
173	av = newAV (); /* will be @_ */
174	av_extend (av, 0);
175	av_store (newpad, 0, (SV *) av);
176	AvFLAGS (av) = AVf_REIFY;
177
178	for (ix = fpad; ix > 0; ix--)
179	{
180	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
181
182	if (namesv && namesv != &PL_sv_undef)
183	{
184	char *name = SvPVX (namesv); /* XXX */
185
186	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
187	{ /* lexical from outside? */
188	npad[ix] = SvREFCNT_inc (ppad[ix]);
189	}
190	else
191	{ /* our own lexical */
192	SV *sv;
193	if (*name == '&')
194	sv = SvREFCNT_inc (ppad[ix]);
195	else if (*name == '@')
196	sv = (SV *) newAV ();
197	else if (*name == '%')
198	sv = (SV *) newHV ();
199	else
200	sv = NEWSV (0, 0);
201
202	#ifdef SvPADBUSY
203	if (!SvPADBUSY (sv))
204	#endif
205	SvPADMY_on (sv);
206
207	npad[ix] = sv;
208	}
209	}
210	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
211	{
212	npad[ix] = SvREFCNT_inc (ppad[ix]);
213	}
214	else
215	{
216	SV *sv = NEWSV (0, 0);
217	SvPADTMP_on (sv);
218	npad[ix] = sv;
219	}
220	}
221
222	#if 0 /* return -ENOTUNDERSTOOD */
223	/* Now that vars are all in place, clone nested closures. */
224
225	for (ix = fpad; ix > 0; ix--) {
226	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
227	if (namesv
228	&& namesv != &PL_sv_undef
229	&& !(SvFLAGS(namesv) & SVf_FAKE)
230	&& *SvPVX(namesv) == '&'
231	&& CvCLONE(ppad[ix]))
232	{
233	CV *kid = cv_clone((CV*)ppad[ix]);
234	SvREFCNT_dec(ppad[ix]);
235	CvCLONE_on(kid);
236	SvPADMY_on(kid);
237	npad[ix] = (SV*)kid;
238	}
239	}
240	#endif
241		180
242	return newpadlist;	181	return newpadlist;
243	}	182	}
244		183
245	STATIC void	184	static void
246	free_padlist (pTHX_ AV *padlist)	185	free_padlist (AV *padlist)
247	{	186	{
248	/* may be during global destruction */	187	/* may be during global destruction */
249	if (SvREFCNT (padlist))	188	if (SvREFCNT (padlist))
250	{	189	{
251	I32 i = AvFILLp (padlist);	190	I32 i = AvFILLp (padlist);
…		…
264		203
265	SvREFCNT_dec ((SV*)padlist);	204	SvREFCNT_dec ((SV*)padlist);
266	}	205	}
267	}	206	}
268		207
269	STATIC int	208	static int
270	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	209	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271	{	210	{
272	AV *padlist;	211	AV *padlist;
273	AV *av = (AV *)mg->mg_obj;	212	AV *av = (AV *)mg->mg_obj;
274		213
275	/* casting is fun. */	214	/* casting is fun. */
276	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277	free_padlist (aTHX_ padlist);	216	free_padlist (padlist);
278		217
279	SvREFCNT_dec (av);	218	SvREFCNT_dec (av);
		219
		220	return 0;
280	}	221	}
281		222
282	#define PERL_MAGIC_coro PERL_MAGIC_ext	223	#define PERL_MAGIC_coro PERL_MAGIC_ext
283		224
284	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
285		226
		227	#define CORO_MAGIC(cv) \
		228	SvMAGIC (cv) \
		229	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		230	? SvMAGIC (cv) \
		231	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		232	: 0
		233
286	/* the next two functions merely cache the padlists */	234	/* the next two functions merely cache the padlists */
287	STATIC void	235	static void
288	get_padlist (pTHX_ CV *cv)	236	get_padlist (CV *cv)
289	{	237	{
290	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	238	MAGIC *mg = CORO_MAGIC (cv);
		239	AV *av;
291		240
292	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
293	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
294	else	243	else
		244	{
		245	#if 0
		246	/* this is probably cleaner, but also slower? */
		247	CV *cp = Perl_cv_clone (cv);
		248	CvPADLIST (cv) = CvPADLIST (cp);
		249	CvPADLIST (cp) = 0;
		250	SvREFCNT_dec (cp);
		251	#else
295	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	252	CvPADLIST (cv) = coro_clone_padlist (cv);
		253	#endif
		254	}
296	}	255	}
297		256
298	STATIC void	257	static void
299	put_padlist (pTHX_ CV *cv)	258	put_padlist (CV *cv)
300	{	259	{
301	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	260	MAGIC *mg = CORO_MAGIC (cv);
		261	AV *av;
302		262
303	if (!mg)	263	if (!mg)
304	{	264	{
305	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	265	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
306	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	266	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
307	mg->mg_virtual = &vtbl_coro;	267	mg->mg_virtual = &vtbl_coro;
308	mg->mg_obj = (SV *)newAV ();	268	mg->mg_obj = (SV *)newAV ();
309	}	269	}
310		270
311	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	271	av = (AV *)mg->mg_obj;
		272
		273	if (AvFILLp (av) >= AvMAX (av))
		274	av_extend (av, AvMAX (av) + 1);
		275
		276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
312	}	277	}
313		278
314	#define SB do {	279	#define SB do {
315	#define SE } while (0)	280	#define SE } while (0)
316		281
317	#define LOAD(state) load_state(aTHX_ (state));	282	#define LOAD(state) load_state((state));
318	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	283	#define SAVE(state,flags) save_state((state),(flags));
319		284
320	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	285	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
321		286
322	static void	287	static void
323	load_state(pTHX_ Coro__State c)	288	load_state(Coro__State c)
324	{	289	{
325	PL_dowarn = c->dowarn;	290	#define VAR(name,type) PL_ ## name = c->name;
326	PL_in_eval = c->in_eval;	291	# include "state.h"
327		292	#undef VAR
328	PL_curstackinfo = c->curstackinfo;
329	PL_curstack = c->curstack;
330	PL_mainstack = c->mainstack;
331	PL_stack_sp = c->stack_sp;
332	PL_op = c->op;
333	PL_curpad = c->curpad;
334	PL_comppad = c->comppad;
335	PL_compcv = c->compcv;
336	PL_stack_base = c->stack_base;
337	PL_stack_max = c->stack_max;
338	PL_tmps_stack = c->tmps_stack;
339	PL_tmps_floor = c->tmps_floor;
340	PL_tmps_ix = c->tmps_ix;
341	PL_tmps_max = c->tmps_max;
342	PL_markstack = c->markstack;
343	PL_markstack_ptr = c->markstack_ptr;
344	PL_markstack_max = c->markstack_max;
345	PL_scopestack = c->scopestack;
346	PL_scopestack_ix = c->scopestack_ix;
347	PL_scopestack_max = c->scopestack_max;
348	PL_savestack = c->savestack;
349	PL_savestack_ix = c->savestack_ix;
350	PL_savestack_max = c->savestack_max;
351	PL_retstack = c->retstack;
352	PL_retstack_ix = c->retstack_ix;
353	PL_retstack_max = c->retstack_max;
354	PL_curpm = c->curpm;
355	PL_curcop = c->curcop;
356	PL_top_env = c->top_env;
357		293
358	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
359	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
360	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
361		297
…		…
364	CV *cv;	300	CV *cv;
365		301
366	/* now do the ugly restore mess */	302	/* now do the ugly restore mess */
367	while ((cv = (CV *)POPs))	303	while ((cv = (CV *)POPs))
368	{	304	{
369	AV *padlist = (AV *)POPs;
370
371	if (padlist)
372	{
373	put_padlist (aTHX_ cv); /* mark this padlist as available */	305	put_padlist (cv); /* mark this padlist as available */
374	CvPADLIST(cv) = padlist;	306	CvDEPTH (cv) = PTR2IV (POPs);
375	}	307	CvPADLIST (cv) = (AV *)POPs;
376
377	++CvDEPTH(cv);
378	}	308	}
379		309
380	PUTBACK;	310	PUTBACK;
381	}	311	}
382	}	312	}
383		313
384	static void	314	static void
385	save_state(pTHX_ Coro__State c, int flags)	315	save_state(Coro__State c, int flags)
386	{	316	{
387	{	317	{
388	dSP;	318	dSP;
389	I32 cxix = cxstack_ix;	319	I32 cxix = cxstack_ix;
390	PERL_CONTEXT *ccstk = cxstack;	320	PERL_CONTEXT *ccstk = cxstack;
…		…
404	PERL_CONTEXT *cx = &ccstk[cxix--];	334	PERL_CONTEXT *cx = &ccstk[cxix--];
405		335
406	if (CxTYPE(cx) == CXt_SUB)	336	if (CxTYPE(cx) == CXt_SUB)
407	{	337	{
408	CV *cv = cx->blk_sub.cv;	338	CV *cv = cx->blk_sub.cv;
		339
409	if (CvDEPTH(cv))	340	if (CvDEPTH (cv))
410	{	341	{
411	EXTEND (SP, CvDEPTH(cv)*2);	342	EXTEND (SP, 3);
412
413	while (--CvDEPTH(cv))
414	{
415	/* this tells the restore code to increment CvDEPTH */
416	PUSHs (Nullsv);
417	PUSHs ((SV *)cv);
418	}
419		343
420	PUSHs ((SV *)CvPADLIST(cv));	344	PUSHs ((SV *)CvPADLIST(cv));
		345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
421	PUSHs ((SV *)cv);	346	PUSHs ((SV *)cv);
422		347
423	get_padlist (aTHX_ cv); /* this is a monster */	348	CvDEPTH (cv) = 0;
		349	get_padlist (cv);
424	}	350	}
425	}	351	}
426	#ifdef CXt_FORMAT	352	#ifdef CXt_FORMAT
427	else if (CxTYPE(cx) == CXt_FORMAT)	353	else if (CxTYPE(cx) == CXt_FORMAT)
428	{	354	{
…		…
446		372
447	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	373	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
448	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
449	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
450		376
451	c->dowarn = PL_dowarn;	377	#define VAR(name,type)c->name = PL_ ## name;
452	c->in_eval = PL_in_eval;	378	# include "state.h"
453		379	#undef VAR
454	c->curstackinfo = PL_curstackinfo;
455	c->curstack = PL_curstack;
456	c->mainstack = PL_mainstack;
457	c->stack_sp = PL_stack_sp;
458	c->op = PL_op;
459	c->curpad = PL_curpad;
460	c->comppad = PL_comppad;
461	c->compcv = PL_compcv;
462	c->stack_base = PL_stack_base;
463	c->stack_max = PL_stack_max;
464	c->tmps_stack = PL_tmps_stack;
465	c->tmps_floor = PL_tmps_floor;
466	c->tmps_ix = PL_tmps_ix;
467	c->tmps_max = PL_tmps_max;
468	c->markstack = PL_markstack;
469	c->markstack_ptr = PL_markstack_ptr;
470	c->markstack_max = PL_markstack_max;
471	c->scopestack = PL_scopestack;
472	c->scopestack_ix = PL_scopestack_ix;
473	c->scopestack_max = PL_scopestack_max;
474	c->savestack = PL_savestack;
475	c->savestack_ix = PL_savestack_ix;
476	c->savestack_max = PL_savestack_max;
477	c->retstack = PL_retstack;
478	c->retstack_ix = PL_retstack_ix;
479	c->retstack_max = PL_retstack_max;
480	c->curpm = PL_curpm;
481	c->curcop = PL_curcop;
482	c->top_env = PL_top_env;
483	}	380	}
484		381
485	/*	382	/*
486	* allocate various perl stacks. This is an exact copy	383	* allocate various perl stacks. This is an exact copy
487	* of perl.c:init_stacks, except that it uses less memory	384	* of perl.c:init_stacks, except that it uses less memory
488	* on the (sometimes correct) assumption that coroutines do	385	* on the (sometimes correct) assumption that coroutines do
489	* not usually need a lot of stackspace.	386	* not usually need a lot of stackspace.
490	*/	387	*/
491	STATIC void	388	static void
492	coro_init_stacks (pTHX)	389	coro_init_stacks ()
493	{	390	{
494	LOCK;
495
496	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
497	PL_curstackinfo->si_type = PERLSI_MAIN;	392	PL_curstackinfo->si_type = PERLSI_MAIN;
498	PL_curstack = PL_curstackinfo->si_stack;	393	PL_curstack = PL_curstackinfo->si_stack;
499	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
500		395
…		…
521		416
522	New(54,PL_savestack,96,ANY);	417	New(54,PL_savestack,96,ANY);
523	PL_savestack_ix = 0;	418	PL_savestack_ix = 0;
524	PL_savestack_max = 96;	419	PL_savestack_max = 96;
525		420
		421	#if !PERL_VERSION_ATLEAST (5,9,0)
526	New(54,PL_retstack,8,OP*);	422	New(54,PL_retstack,8,OP*);
527	PL_retstack_ix = 0;	423	PL_retstack_ix = 0;
528	PL_retstack_max = 8;	424	PL_retstack_max = 8;
529		425	#endif
530	UNLOCK;
531	}	426	}
532		427
533	/*	428	/*
534	* destroy the stacks, the callchain etc...	429	* destroy the stacks, the callchain etc...
535	*/	430	*/
536	STATIC void	431	static void
537	destroy_stacks(pTHX)	432	coro_destroy_stacks ()
538	{	433	{
539	if (!IN_DESTRUCT)	434	if (!IN_DESTRUCT)
540	{	435	{
541	/* is this ugly, I ask? */	436	/* is this ugly, I ask? */
542	LEAVE_SCOPE (0);	437	LEAVE_SCOPE (0);
…		…
573		468
574	Safefree (PL_tmps_stack);	469	Safefree (PL_tmps_stack);
575	Safefree (PL_markstack);	470	Safefree (PL_markstack);
576	Safefree (PL_scopestack);	471	Safefree (PL_scopestack);
577	Safefree (PL_savestack);	472	Safefree (PL_savestack);
		473	#if !PERL_VERSION_ATLEAST (5,9,0)
578	Safefree (PL_retstack);	474	Safefree (PL_retstack);
579	}
580
581	static void
582	allocate_stack (Coro__State ctx, int alloc)
583	{
584	coro_stack *stack;
585
586	New (0, stack, 1, coro_stack);
587
588	stack->refcnt = 1;
589	stack->usecnt = 1;
590	stack->gencnt = ctx->gencnt = 0;
591
592	if (alloc)
593	{
594	#if HAVE_MMAP
595	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
596	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
597	if (stack->sptr == (void *)-1)
598	#endif	475	#endif
599	{
600	/*FIXME*//*D*//* reasonable stack size! */
601	stack->ssize = - (STACKSIZE * sizeof (long));
602	New (0, stack->sptr, STACKSIZE, long);
603	}
604	}
605	else
606	stack->sptr = 0;
607
608	ctx->stack = stack;
609	}	476	}
610		477
611	static void	478	static void
612	deallocate_stack (Coro__State ctx)	479	setup_coro (struct coro *coro)
613	{
614	coro_stack *stack = ctx->stack;
615
616	ctx->stack = 0;
617
618	if (stack)
619	{
620	if (!--stack->refcnt)
621	{
622	#ifdef HAVE_MMAP
623	if (stack->ssize > 0 && stack->sptr)
624	munmap (stack->sptr, stack->ssize);
625	else
626	#endif
627	Safefree (stack->sptr);
628
629	Safefree (stack);
630	}
631	else if (ctx->gencnt == stack->gencnt)
632	--stack->usecnt;
633	}
634	}
635
636	static void
637	setup_coro (void *arg)
638	{	480	{
639	/*	481	/*
640	* emulate part of the perl startup here.	482	* emulate part of the perl startup here.
641	*/	483	*/
642	dTHX;
643	dSP;
644	Coro__State ctx = (Coro__State)arg;
645	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
646		484
647	coro_init_stacks (aTHX);	485	coro_init_stacks ();
		486
648	/*PL_curcop = 0;*/	487	PL_curcop = 0;
649	/*PL_in_eval = PL_in_eval;*/ /* inherit */	488	PL_in_eval = 0;
		489	PL_curpm = 0;
		490
		491	{
		492	dSP;
		493	LOGOP myop;
		494
		495	/* I have no idea why this is needed, but it is */
		496	PUSHMARK (SP);
		497
650	SvREFCNT_dec (GvAV (PL_defgv));	498	SvREFCNT_dec (GvAV (PL_defgv));
651	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	499	GvAV (PL_defgv) = coro->args; coro->args = 0;
652		500
653	SPAGAIN;
654
655	if (ctx->stack)
656	{
657	ctx->cursp = 0;
658
659	PUSHMARK(SP);
660	PUTBACK;
661	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
662
663	if (SvTRUE (ERRSV))
664	croak (NULL);
665	else
666	croak ("FATAL: CCTXT coroutine returned!");
667	}
668	else
669	{
670	UNOP myop;
671
672	PL_op = (OP *)&myop;
673
674	Zero(&myop, 1, UNOP);	501	Zero (&myop, 1, LOGOP);
675	myop.op_next = Nullop;	502	myop.op_next = Nullop;
676	myop.op_flags = OPf_WANT_VOID;	503	myop.op_flags = OPf_WANT_VOID;
677		504
		505	PL_op = (OP *)&myop;
		506
678	PUSHMARK(SP);	507	PUSHMARK (SP);
679	XPUSHs (sub_init);	508	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
680	/*
681	* the next line is slightly wrong, as PL_op->op_next
682	* is actually being executed so we skip the first op.
683	* that doesn't matter, though, since it is only
684	* pp_nextstate and we never return...
685	* ah yes, and I don't care anyways ;)
686	*/
687	PUTBACK;	509	PUTBACK;
688	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	510	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
689	SPAGAIN;	511	SPAGAIN;
690		512
691	ENTER; /* necessary e.g. for dounwind */	513	ENTER; /* necessary e.g. for dounwind */
692	}	514	}
693	}	515	}
694		516
695	static void	517	static void
696	continue_coro (void *arg)	518	free_coro_mortal ()
697	{	519	{
698	/*
699	* this is a _very_ stripped down perl interpreter ;)
700	*/
701	dTHX;
702	Coro__State ctx = (Coro__State)arg;
703	JMPENV coro_start_env;
704
705	PL_top_env = &ctx->start_env;
706
707	ctx->cursp = 0;
708	PL_op = PL_op->op_next;
709	CALLRUNOPS(aTHX);
710
711	abort ();
712	}
713
714	STATIC void
715	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
716	{
717	dSTACKLEVEL;
718
719	if (prev != next)
720	{
721	if (next->mainstack)
722	{
723	LOCK;
724	SAVE (prev, flags);
725	LOAD (next);
726	UNLOCK;
727
728	/* mark this state as in-use */
729	next->mainstack = 0;
730	next->tmps_ix = -2;
731
732	/* stacklevel changed? if yes, grab the stack for us! */
733	if (flags & TRANSFER_SAVE_CCTXT)
734	{
735	if (!prev->stack)
736	allocate_stack (prev, 0);
737	else if (prev->cursp != stacklevel
738	&& prev->stack->usecnt > 1)
739	{
740	prev->gencnt = ++prev->stack->gencnt;
741	prev->stack->usecnt = 1;
742	}
743
744	/* has our stack been invalidated? */
745	if (next->stack && next->stack->gencnt != next->gencnt)
746	{
747	deallocate_stack (next);
748	allocate_stack (next, 1);
749	coro_create (&(next->stack->cctx),
750	continue_coro, (void *)next,
751	next->stack->sptr, labs (next->stack->ssize));
752	}
753
754	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755	prev->cursp = stacklevel;
756	/* don't add any code here */
757	}
758	else
759	next->cursp = stacklevel;
760	}
761	else if (next->tmps_ix == -2)
762	croak ("tried to transfer to running coroutine");
763	else
764	{
765	LOCK;
766	SAVE (prev, -1); /* first get rid of the old state */
767	UNLOCK;
768
769	if (flags & TRANSFER_SAVE_CCTXT)
770	{
771	if (!prev->stack)
772	allocate_stack (prev, 0);
773
774	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
775	{
776	PL_top_env = &next->start_env;
777
778	setup_coro (next);
779	next->cursp = stacklevel;
780
781	prev->stack->refcnt++;
782	prev->stack->usecnt++;
783	next->stack = prev->stack;
784	next->gencnt = prev->gencnt;
785	}
786	else
787	{
788	assert (!next->stack);
789	allocate_stack (next, 1);
790	coro_create (&(next->stack->cctx),
791	setup_coro, (void *)next,
792	next->stack->sptr, labs (next->stack->ssize));
793	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
794	prev->cursp = stacklevel;
795	/* don't add any code here */
796	}
797	}
798	else
799	{
800	setup_coro (next);
801	next->cursp = stacklevel;
802	}
803	}
804	}
805
806	LOCK;
807	if (coro_mortal)	520	if (coro_mortal)
808	{	521	{
809	SvREFCNT_dec (coro_mortal);	522	SvREFCNT_dec (coro_mortal);
810	coro_mortal = 0;	523	coro_mortal = 0;
811	}	524	}
		525	}
		526
		527	static void NOINLINE
		528	prepare_cctx (coro_cctx *cctx)
		529	{
		530	dSP;
		531	LOGOP myop;
		532
		533	Zero (&myop, 1, LOGOP);
		534	myop.op_next = PL_op;
		535	myop.op_flags = OPf_WANT_VOID;
		536
		537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		538
		539	PUSHMARK (SP);
		540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		541	PUTBACK;
		542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		543	SPAGAIN;
		544	}
		545
		546	static void
		547	coro_run (void *arg)
		548	{
		549	/* coro_run is the alternative epilogue of transfer() */
812	UNLOCK;	550	UNLOCK;
813	}
814		551
815	#define SV_CORO(sv,func) \	552	/*
816	do { \	553	* this is a _very_ stripped down perl interpreter ;)
817	if (SvROK (sv)) \	554	*/
818	sv = SvRV (sv); \	555	PL_top_env = &PL_start_env;
819	\
820	if (SvTYPE (sv) == SVt_PVHV) \
821	{ \
822	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
823	\
824	if (!he) \
825	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
826	\
827	(sv) = SvRV (HeVAL(he)); \
828	} \
829	\
830	/* must also be changed inside Coro::Cont::yield */ \
831	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
832	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
833	\
834	} while(0)
835		556
836	#define SvSTATE(sv) (struct coro *)SvIV (sv)	557	/* inject call to cctx_init */
		558	prepare_cctx ((coro_cctx *)arg);
837		559
		560	/* somebody will hit me for both perl_run and PL_restartop */
		561	perl_run (PL_curinterp);
		562
		563	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		564	abort ();
		565	}
		566
		567	static coro_cctx *
		568	cctx_new ()
		569	{
		570	coro_cctx *cctx;
		571
		572	++cctx_count;
		573
		574	New (0, cctx, 1, coro_cctx);
		575
		576	#if HAVE_MMAP
		577
		578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		579	/* mmap suppsedly does allocate-on-write for us */
		580	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		581
		582	if (cctx->sptr == (void *)-1)
		583	{
		584	perror ("FATAL: unable to mmap stack for coroutine");
		585	_exit (EXIT_FAILURE);
		586	}
		587
		588	# if STACKGUARD
		589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		590	# endif
		591
		592	#else
		593
		594	cctx->ssize = STACKSIZE * (long)sizeof (long);
		595	New (0, cctx->sptr, STACKSIZE, long);
		596
		597	if (!cctx->sptr)
		598	{
		599	perror ("FATAL: unable to malloc stack for coroutine");
		600	_exit (EXIT_FAILURE);
		601	}
		602
		603	#endif
		604
		605	#if USE_VALGRIND
		606	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		607	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		608	cctx->ssize + (char *)cctx->sptr
		609	);
		610	#endif
		611
		612	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		613
		614	return cctx;
		615	}
		616
		617	static void
		618	cctx_free (coro_cctx *cctx)
		619	{
		620	if (!cctx)
		621	return;
		622
		623	--cctx_count;
		624
		625	#if USE_VALGRIND
		626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		627	#endif
		628
		629	#if HAVE_MMAP
		630	munmap (cctx->sptr, cctx->ssize);
		631	#else
		632	Safefree (cctx->sptr);
		633	#endif
		634
		635	Safefree (cctx);
		636	}
		637
		638	static coro_cctx *
		639	cctx_get ()
		640	{
		641	coro_cctx *cctx;
		642
		643	if (cctx_first)
		644	{
		645	--cctx_idle;
		646	cctx = cctx_first;
		647	cctx_first = cctx->next;
		648	}
		649	else
		650	{
		651	cctx = cctx_new ();
		652	PL_op = PL_op->op_next;
		653	}
		654
		655	return cctx;
		656	}
		657
		658	static void
		659	cctx_put (coro_cctx *cctx)
		660	{
		661	++cctx_idle;
		662	cctx->next = cctx_first;
		663	cctx_first = cctx;
		664	}
		665
		666	/* never call directly, always through the coro_state_transfer global variable */
		667	static void NOINLINE
		668	transfer (struct coro *prev, struct coro *next, int flags)
		669	{
		670	dSTACKLEVEL;
		671
		672	/* sometimes transfer is only called to set idle_sp */
		673	if (flags == TRANSFER_SET_STACKLEVEL)
		674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		675	else if (prev != next)
		676	{
		677	coro_cctx *prev__cctx;
		678
		679	if (!prev->cctx)
		680	{
		681	/* create a new empty context */
		682	Newz (0, prev->cctx, 1, coro_cctx);
		683	prev->cctx->inuse = 1;
		684	prev->flags |= CF_RUNNING;
		685	}
		686
		687	assert ( prev->flags & CF_RUNNING);
		688	assert (!next->flags & CF_RUNNING);
		689
		690	prev->flags &= ~CF_RUNNING;
		691	next->flags |= CF_RUNNING;
		692
		693	LOCK;
		694
		695	if (next->mainstack)
		696	{
		697	/* coroutine already started */
		698	SAVE (prev, flags);
		699	LOAD (next);
		700	}
		701	else
		702	{
		703	/* need to start coroutine */
		704	/* first get rid of the old state */
		705	SAVE (prev, -1);
		706	/* setup coroutine call */
		707	setup_coro (next);
		708	/* need a stack */
		709	assert (!next->stack);
		710	next->cctx = 0;
		711	}
		712
		713	prev__cctx = prev->cctx;
		714
		715	/* possibly "free" the cctx */
		716	if (prev__cctx->idle_sp == STACKLEVEL)
		717	{
		718	assert (PL_top_env == prev__cctx->top_env);//D
		719	cctx_put (prev__cctx);
		720	prev->cctx = 0;
		721	}
		722
		723	if (!next->cctx)
		724	next->cctx = cctx_get ();
		725
		726	if (prev__cctx != next->cctx)
		727	{
		728	assert ( prev__cctx->inuse);
		729	assert (!next->cctx->inuse);
		730
		731	prev__cctx->inuse = 0;
		732	next->cctx->inuse = 1;
		733
		734	prev__cctx->top_env = PL_top_env;
		735	PL_top_env = next->cctx->top_env;
		736	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		737	}
		738
		739	free_coro_mortal ();
		740
		741	UNLOCK;
		742	}
		743	}
		744
		745	struct transfer_args
		746	{
		747	struct coro *prev, *next;
		748	int flags;
		749	};
		750
		751	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		752
		753	static void
		754	coro_state_destroy (struct coro *coro)
		755	{
		756	if (coro->refcnt--)
		757	return;
		758
		759	if (coro->mainstack && coro->mainstack != main_mainstack)
		760	{
		761	struct coro temp;
		762
		763	SAVE ((&temp), TRANSFER_SAVE_ALL);
		764	LOAD (coro);
		765
		766	coro_destroy_stacks ();
		767
		768	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		769
		770	coro->mainstack = 0;
		771	}
		772
		773	cctx_free (coro->cctx);
		774	SvREFCNT_dec (coro->args);
		775	Safefree (coro);
		776	}
		777
838	static void	778	static int
		779	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		780	{
		781	struct coro *coro = (struct coro *)mg->mg_ptr;
		782	mg->mg_ptr = 0;
		783
		784	coro_state_destroy (coro);
		785
		786	return 0;
		787	}
		788
		789	static int
		790	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		791	{
		792	struct coro *coro = (struct coro *)mg->mg_ptr;
		793
		794	++coro->refcnt;
		795
		796	return 0;
		797	}
		798
		799	static MGVTBL coro_state_vtbl = {
		800	0, 0, 0, 0,
		801	coro_state_clear,
		802	0,
		803	#ifdef MGf_DUP
		804	coro_state_dup,
		805	#else
		806	# define MGf_DUP 0
		807	#endif
		808	};
		809
		810	static struct coro *
		811	SvSTATE (SV *coro)
		812	{
		813	HV *stash;
		814	MAGIC *mg;
		815
		816	if (SvROK (coro))
		817	coro = SvRV (coro);
		818
		819	stash = SvSTASH (coro);
		820	if (stash != coro_stash && stash != coro_state_stash)
		821	{
		822	/* very slow, but rare, check */
		823	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		824	croak ("Coro::State object required");
		825	}
		826
		827	mg = SvMAGIC (coro);
		828	assert (mg->mg_type == PERL_MAGIC_ext);
		829	return (struct coro *)mg->mg_ptr;
		830	}
		831
		832	static void
		833	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		834	{
		835	ta->prev = SvSTATE (prev);
		836	ta->next = SvSTATE (next);
		837	ta->flags = flags;
		838	}
		839
		840	static void
839	api_transfer(pTHX_ SV *prev, SV *next, int flags)	841	api_transfer (SV *prev, SV *next, int flags)
840	{	842	{
841	SV_CORO (prev, "Coro::transfer");	843	dTHX;
842	SV_CORO (next, "Coro::transfer");	844	struct transfer_args ta;
843		845
844	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	846	prepare_transfer (&ta, prev, next, flags);
		847	TRANSFER (ta);
845	}	848	}
846		849
847	/** Coro ********************************************************************/	850	/** Coro ********************************************************************/
848		851
849	#define PRIO_MAX 3	852	#define PRIO_MAX 3
…		…
853	#define PRIO_IDLE -3	856	#define PRIO_IDLE -3
854	#define PRIO_MIN -4	857	#define PRIO_MIN -4
855		858
856	/* for Coro.pm */	859	/* for Coro.pm */
857	static GV *coro_current, *coro_idle;	860	static GV *coro_current, *coro_idle;
858	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	861	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
859	static int coro_nready;	862	static int coro_nready;
860		863
861	static void	864	static void
862	coro_enq (pTHX_ SV *sv)	865	coro_enq (SV *sv)
863	{	866	{
		867	int prio;
		868
864	if (SvTYPE (sv) == SVt_PVHV)	869	if (SvTYPE (sv) != SVt_PVHV)
865	{
866	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
867	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
868
869	prio = prio > PRIO_MAX ? PRIO_MAX
870	: prio < PRIO_MIN ? PRIO_MIN
871	: prio;
872
873	av_push (coro_ready [prio - PRIO_MIN], sv);
874	coro_nready++;
875
876	return;
877	}
878
879	croak ("Coro::ready tried to enqueue something that is not a coroutine");	870	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		871
		872	prio = SvSTATE (sv)->prio;
		873
		874	av_push (coro_ready [prio - PRIO_MIN], sv);
		875	coro_nready++;
880	}	876	}
881		877
882	static SV *	878	static SV *
883	coro_deq (pTHX_ int min_prio)	879	coro_deq (int min_prio)
884	{	880	{
885	int prio = PRIO_MAX - PRIO_MIN;	881	int prio = PRIO_MAX - PRIO_MIN;
886		882
887	min_prio -= PRIO_MIN;	883	min_prio -= PRIO_MIN;
888	if (min_prio < 0)	884	if (min_prio < 0)
889	min_prio = 0;	885	min_prio = 0;
890		886
891	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
892	if (av_len (coro_ready[prio]) >= 0)	888	if (AvFILLp (coro_ready [prio]) >= 0)
893	{	889	{
894	coro_nready--;	890	coro_nready--;
895	return av_shift (coro_ready[prio]);	891	return av_shift (coro_ready [prio]);
896	}	892	}
897		893
898	return 0;	894	return 0;
899	}	895	}
900		896
901	static void	897	static int
902	api_ready (SV *coro)	898	api_ready (SV *coro_sv)
		899	{
		900	struct coro *coro;
		901
		902	if (SvROK (coro_sv))
		903	coro_sv = SvRV (coro_sv);
		904
		905	coro = SvSTATE (coro_sv);
		906	if (coro->flags & CF_READY)
		907	return 0;
		908
		909	coro->flags |= CF_READY;
		910
		911	LOCK;
		912	coro_enq (SvREFCNT_inc (coro_sv));
		913	UNLOCK;
		914
		915	return 1;
		916	}
		917
		918	static int
		919	api_is_ready (SV *coro_sv)
		920	{
		921	struct coro *coro;
		922
		923	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		924	}
		925
		926	static void
		927	prepare_schedule (struct transfer_args *ta)
		928	{
		929	SV *current, *prev, *next;
		930
		931	current = GvSV (coro_current);
		932
		933	for (;;)
		934	{
		935	LOCK;
		936	next = coro_deq (PRIO_MIN);
		937	UNLOCK;
		938
		939	if (next)
		940	break;
		941
		942	{
		943	dSP;
		944
		945	ENTER;
		946	SAVETMPS;
		947
		948	PUSHMARK (SP);
		949	PUTBACK;
		950	call_sv (GvSV (coro_idle), G_DISCARD);
		951
		952	FREETMPS;
		953	LEAVE;
		954	}
		955	}
		956
		957	prev = SvRV (current);
		958	SvRV (current) = next;
		959
		960	/* free this only after the transfer */
		961	LOCK;
		962	free_coro_mortal ();
		963	UNLOCK;
		964	coro_mortal = prev;
		965
		966	ta->prev = SvSTATE (prev);
		967	ta->next = SvSTATE (next);
		968	ta->flags = TRANSFER_SAVE_ALL;
		969
		970	ta->next->flags &= ~CF_READY;
		971	}
		972
		973	static void
		974	prepare_cede (struct transfer_args *ta)
		975	{
		976	api_ready (GvSV (coro_current));
		977
		978	prepare_schedule (ta);
		979	}
		980
		981	static void
		982	api_schedule (void)
903	{	983	{
904	dTHX;	984	dTHX;
		985	struct transfer_args ta;
905		986
906	if (SvROK (coro))	987	prepare_schedule (&ta);
907	coro = SvRV (coro);	988	TRANSFER (ta);
908
909	LOCK;
910	coro_enq (aTHX_ SvREFCNT_inc (coro));
911	UNLOCK;
912	}	989	}
913		990
914	static void	991	static void
915	api_schedule (void)	992	api_cede (void)
916	{	993	{
917	dTHX;	994	dTHX;
		995	struct transfer_args ta;
918		996
919	SV *prev, *next;	997	prepare_cede (&ta);
920		998	TRANSFER (ta);
921	LOCK;
922
923	prev = SvRV (GvSV (coro_current));
924	next = coro_deq (aTHX_ PRIO_MIN);
925
926	if (!next)
927	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
928
929	/* free this only after the transfer */
930	coro_mortal = prev;
931	SV_CORO (prev, "Coro::schedule");
932
933	SvRV (GvSV (coro_current)) = next;
934
935	SV_CORO (next, "Coro::schedule");
936
937	UNLOCK;
938
939	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
940	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
941	}
942
943	static void
944	api_cede (void)
945	{
946	dTHX;
947
948	LOCK;
949	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
950	UNLOCK;
951
952	api_schedule ();
953	}	999	}
954		1000
955	MODULE = Coro::State PACKAGE = Coro::State	1001	MODULE = Coro::State PACKAGE = Coro::State
956		1002
957	PROTOTYPES: ENABLE	1003	PROTOTYPES: DISABLE
958		1004
959	BOOT:	1005	BOOT:
960	{ /* {} necessary for stoopid perl-5.6.x */	1006	{
961	#ifdef USE_ITHREADS	1007	#ifdef USE_ITHREADS
962	MUTEX_INIT (&coro_mutex);	1008	MUTEX_INIT (&coro_mutex);
963	#endif	1009	#endif
		1010	BOOT_PAGESIZE;
964		1011
965	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
966	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
967	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1012	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
968		1013
969	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1014	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
970	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1015	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
971	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1016	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
972	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
973		1017
974	main_mainstack = PL_mainstack;	1018	main_mainstack = PL_mainstack;
975		1019
976	coroapi.ver = CORO_API_VERSION;	1020	coroapi.ver = CORO_API_VERSION;
977	coroapi.transfer = api_transfer;	1021	coroapi.transfer = api_transfer;
978	}
979		1022
980	Coro::State	1023	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
981	_newprocess(args)	1024	}
982	SV * args	1025
983	PROTOTYPE: $	1026	SV *
		1027	new (char *klass, ...)
984	CODE:	1028	CODE:
985	Coro__State coro;	1029	{
		1030	struct coro *coro;
		1031	HV *hv;
		1032	int i;
986		1033
987	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
988	croak ("Coro::State::_newprocess expects an arrayref");
989
990	Newz (0, coro, 1, struct coro);	1034	Newz (0, coro, 1, struct coro);
		1035	coro->args = newAV ();
991		1036
992	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1037	hv = newHV ();
993	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1038	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
994	/*coro->stack = 0;*/	1039	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
995		1040
996	/* same as JMPENV_BOOTSTRAP */	1041	for (i = 1; i < items; i++)
997	/* we might be able to recycle start_env, but safe is safe */	1042	av_push (coro->args, newSVsv (ST (i)));
998	/*Zero(&coro->start_env, 1, JMPENV);*/	1043	}
999	coro->start_env.je_ret = -1;
1000	coro->start_env.je_mustcatch = TRUE;
1001
1002	RETVAL = coro;
1003	OUTPUT:	1044	OUTPUT:
1004	RETVAL	1045	RETVAL
1005		1046
1006	void	1047	void
1007	transfer(prev, next, flags)	1048	_set_stacklevel (...)
1008	SV *prev	1049	ALIAS:
1009	SV *next	1050	Coro::State::transfer = 1
1010	int flags	1051	Coro::schedule = 2
1011	PROTOTYPE: @	1052	Coro::cede = 3
		1053	Coro::Cont::yield = 4
1012	CODE:	1054	CODE:
1013	PUTBACK;	1055	{
1014	SV_CORO (next, "Coro::transfer");	1056	struct transfer_args ta;
1015	SV_CORO (prev, "Coro::transfer");	1057
1016	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1058	switch (ix)
1017	SPAGAIN;	1059	{
		1060	case 0:
		1061	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1062	ta.next = 0;
		1063	ta.flags = TRANSFER_SET_STACKLEVEL;
		1064	break;
		1065
		1066	case 1:
		1067	if (items != 3)
		1068	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1069
		1070	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1071	break;
		1072
		1073	case 2:
		1074	prepare_schedule (&ta);
		1075	break;
		1076
		1077	case 3:
		1078	prepare_cede (&ta);
		1079	break;
		1080
		1081	case 4:
		1082	{
		1083	SV *yieldstack;
		1084	SV *sv;
		1085	AV *defav = GvAV (PL_defgv);
		1086
		1087	yieldstack = *hv_fetch (
		1088	(HV *)SvRV (GvSV (coro_current)),
		1089	"yieldstack", sizeof ("yieldstack") - 1,
		1090	0
		1091	);
		1092
		1093	/* set up @_ -- ugly */
		1094	av_clear (defav);
		1095	av_fill (defav, items - 1);
		1096	while (items--)
		1097	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1098
		1099	sv = av_pop ((AV *)SvRV (yieldstack));
		1100	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1101	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1102	ta.flags = 0;
		1103	SvREFCNT_dec (sv);
		1104	}
		1105	break;
		1106
		1107	}
		1108
		1109	TRANSFER (ta);
		1110	}
1018		1111
1019	void	1112	void
1020	DESTROY(coro)	1113	_clone_state_from (SV *dst, SV *src)
1021	Coro::State coro	1114	CODE:
1022	CODE:	1115	{
		1116	struct coro *coro_src = SvSTATE (src);
1023		1117
1024	if (coro->mainstack && coro->mainstack != main_mainstack)	1118	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1025	{
1026	struct coro temp;
1027		1119
1028	PUTBACK;	1120	++coro_src->refcnt;
1029	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1121	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1030	LOAD (aTHX_ coro);	1122	}
1031	SPAGAIN;
1032
1033	destroy_stacks (aTHX);
1034
1035	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1036	SPAGAIN;
1037
1038	coro->mainstack = 0;
1039	}
1040
1041	deallocate_stack (coro);
1042	SvREFCNT_dec (coro->args);
1043	Safefree (coro);
1044		1123
1045	void	1124	void
1046	_exit(code)	1125	_exit (code)
1047	int code	1126	int code
1048	PROTOTYPE: $	1127	PROTOTYPE: $
1049	CODE:	1128	CODE:
1050	_exit (code);	1129	_exit (code);
1051		1130
1052	MODULE = Coro::State PACKAGE = Coro::Cont	1131	int
		1132	cctx_count ()
		1133	CODE:
		1134	RETVAL = cctx_count;
		1135	OUTPUT:
		1136	RETVAL
1053		1137
1054	# this is slightly dirty (should expose a c-level api)	1138	int
1055		1139	cctx_idle ()
1056	void	1140	CODE:
1057	yield(...)	1141	RETVAL = cctx_idle;
1058	PROTOTYPE: @	1142	OUTPUT:
1059	CODE:	1143	RETVAL
1060	SV *yieldstack;
1061	SV *sv;
1062	AV *defav = GvAV (PL_defgv);
1063	struct coro *prev, *next;
1064
1065	yieldstack = *hv_fetch (
1066	(HV *)SvRV (GvSV (coro_current)),
1067	"yieldstack", sizeof ("yieldstack") - 1,
1068	0
1069	);
1070
1071	/* set up @_ -- ugly */
1072	av_clear (defav);
1073	av_fill (defav, items - 1);
1074	while (items--)
1075	av_store (defav, items, SvREFCNT_inc (ST(items)));
1076
1077	sv = av_pop ((AV *)SvRV (yieldstack));
1078	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1079	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1080	SvREFCNT_dec (sv);
1081
1082	transfer (aTHX_ prev, next, 0);
1083		1144
1084	MODULE = Coro::State PACKAGE = Coro	1145	MODULE = Coro::State PACKAGE = Coro
1085		1146
1086	# this is slightly dirty (should expose a c-level api)
1087
1088	BOOT:	1147	BOOT:
1089	{	1148	{
1090	int i;	1149	int i;
		1150
1091	HV *stash = gv_stashpv ("Coro", TRUE);	1151	coro_stash = gv_stashpv ("Coro", TRUE);
1092		1152
1093	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1153	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1094	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1154	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1095	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1155	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1096	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1156	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1097	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1157	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1098	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1158	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1099		1159
1100	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1160	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1101	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1161	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1102		1162
1103	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1163	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1107	SV *sv = perl_get_sv("Coro::API", 1);	1167	SV *sv = perl_get_sv("Coro::API", 1);
1108		1168
1109	coroapi.schedule = api_schedule;	1169	coroapi.schedule = api_schedule;
1110	coroapi.cede = api_cede;	1170	coroapi.cede = api_cede;
1111	coroapi.ready = api_ready;	1171	coroapi.ready = api_ready;
		1172	coroapi.is_ready = api_is_ready;
1112	coroapi.nready = &coro_nready;	1173	coroapi.nready = &coro_nready;
1113	coroapi.current = coro_current;	1174	coroapi.current = coro_current;
1114		1175
1115	GCoroAPI = &coroapi;	1176	GCoroAPI = &coroapi;
1116	sv_setiv(sv, (IV)&coroapi);	1177	sv_setiv (sv, (IV)&coroapi);
1117	SvREADONLY_on(sv);	1178	SvREADONLY_on (sv);
1118	}	1179	}
1119	}	1180	}
1120		1181
1121	#if !PERL_MICRO	1182	int
		1183	prio (Coro::State coro, int newprio = 0)
		1184	ALIAS:
		1185	nice = 1
		1186	CODE:
		1187	{
		1188	RETVAL = coro->prio;
1122		1189
1123	void	1190	if (items > 1)
		1191	{
		1192	if (ix)
		1193	newprio += coro->prio;
		1194
		1195	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1196	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1197
		1198	coro->prio = newprio;
		1199	}
		1200	}
		1201
		1202	SV *
1124	ready(self)	1203	ready (SV *self)
1125	SV * self
1126	PROTOTYPE: $	1204	PROTOTYPE: $
1127	CODE:	1205	CODE:
1128	api_ready (self);	1206	RETVAL = boolSV (api_ready (self));
		1207	OUTPUT:
		1208	RETVAL
1129		1209
1130	#endif	1210	SV *
		1211	is_ready (SV *self)
		1212	PROTOTYPE: $
		1213	CODE:
		1214	RETVAL = boolSV (api_is_ready (self));
		1215	OUTPUT:
		1216	RETVAL
1131		1217
1132	int	1218	int
1133	nready(...)	1219	nready (...)
1134	PROTOTYPE:	1220	PROTOTYPE:
1135	CODE:	1221	CODE:
1136	RETVAL = coro_nready;	1222	RETVAL = coro_nready;
1137	OUTPUT:	1223	OUTPUT:
1138	RETVAL	1224	RETVAL
1139		1225
1140	void	1226	MODULE = Coro::State PACKAGE = Coro::AIO
1141	schedule(...)
1142	PROTOTYPE:
1143	CODE:
1144	api_schedule ();
1145		1227
1146	void
1147	cede(...)
1148	PROTOTYPE:
1149	CODE:
1150	api_cede ();
1151
1152	# and these are hacks
1153	SV *	1228	SV *
1154	_aio_get_state ()	1229	_get_state ()
1155	CODE:	1230	CODE:
1156	{	1231	{
1157	struct {	1232	struct {
1158	int errorno;	1233	int errorno;
1159	int laststype;	1234	int laststype;
…		…
1170	}	1245	}
1171	OUTPUT:	1246	OUTPUT:
1172	RETVAL	1247	RETVAL
1173		1248
1174	void	1249	void
1175	_aio_set_state (char *data_)	1250	_set_state (char *data_)
1176	PROTOTYPE: $	1251	PROTOTYPE: $
1177	CODE:	1252	CODE:
1178	{	1253	{
1179	struct {	1254	struct {
1180	int errorno;	1255	int errorno;

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