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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.75 by root, Thu Oct 26 06:50:20 2006 UTC vs.
Revision 1.109 by root, Mon Nov 27 18:45:29 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	#if USE_VALGRIND
		125	int valgrind_id;
		126	#endif
		127	} coro_cctx;
		128
		129	/* this is a structure representing a perl-level coroutine */
89	struct coro {	130	struct coro {
90	/* the top-level JMPENV for each coroutine, needed to catch dies. */	131	/* the c coroutine allocated to this perl coroutine, if any */
91	JMPENV start_env;	132	coro_cctx *cctx;
92		133
93	/* the optional C context */	134	/* data associated with this coroutine (initial args) */
94	coro_stack *stack;	135	AV *args;
95	void *cursp;
96	int gencnt;	136	int refcnt;
97		137
98	/* optionally saved, might be zero */	138	/* optionally saved, might be zero */
99	AV *defav;	139	AV *defav;
100	SV *defsv;	140	SV *defsv;
101	SV *errsv;	141	SV *errsv;
102		142
103	/* saved global state not related to stacks */	143	#define VAR(name,type) type name;
104	U8 dowarn;	144	# include "state.h"
105	I32 in_eval;	145	#undef VAR
106		146
107	/* the stacks and related info (callchain etc..) */	147	/* coro process data */
108	PERL_SI *curstackinfo;	148	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	};	149	};
141		150
142	typedef struct coro *Coro__State;	151	typedef struct coro *Coro__State;
143	typedef struct coro *Coro__State_or_hashref;	152	typedef struct coro *Coro__State_or_hashref;
144		153
145	/* mostly copied from op.c:cv_clone2 */	154	static AV *
146	STATIC AV *	155	coro_clone_padlist (CV *cv)
147	clone_padlist (pTHX_ AV *protopadlist)
148	{	156	{
149	AV *av;	157	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;	158	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		159
168	newpadlist = newAV ();	160	newpadlist = newAV ();
169	AvREAL_off (newpadlist);	161	AvREAL_off (newpadlist);
170	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)));
171	av_store (newpadlist, 1, (SV *) newpad);	171	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	AvREIFY_on (av);
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		172
242	return newpadlist;	173	return newpadlist;
243	}	174	}
244		175
245	STATIC void	176	static void
246	free_padlist (pTHX_ AV *padlist)	177	free_padlist (AV *padlist)
247	{	178	{
248	/* may be during global destruction */	179	/* may be during global destruction */
249	if (SvREFCNT (padlist))	180	if (SvREFCNT (padlist))
250	{	181	{
251	I32 i = AvFILLp (padlist);	182	I32 i = AvFILLp (padlist);
…		…
264		195
265	SvREFCNT_dec ((SV*)padlist);	196	SvREFCNT_dec ((SV*)padlist);
266	}	197	}
267	}	198	}
268		199
269	STATIC int	200	static int
270	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	201	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271	{	202	{
272	AV *padlist;	203	AV *padlist;
273	AV *av = (AV *)mg->mg_obj;	204	AV *av = (AV *)mg->mg_obj;
274		205
275	/* casting is fun. */	206	/* casting is fun. */
276	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	207	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277	free_padlist (aTHX_ padlist);	208	free_padlist (padlist);
278		209
279	SvREFCNT_dec (av);	210	SvREFCNT_dec (av);
		211
		212	return 0;
280	}	213	}
281		214
282	#define PERL_MAGIC_coro PERL_MAGIC_ext	215	#define PERL_MAGIC_coro PERL_MAGIC_ext
283		216
284	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	217	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
285		218
		219	#define CORO_MAGIC(cv) \
		220	SvMAGIC (cv) \
		221	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		222	? SvMAGIC (cv) \
		223	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		224	: 0
		225
286	/* the next two functions merely cache the padlists */	226	/* the next two functions merely cache the padlists */
287	STATIC void	227	static void
288	get_padlist (pTHX_ CV *cv)	228	get_padlist (CV *cv)
289	{	229	{
290	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	230	MAGIC *mg = CORO_MAGIC (cv);
		231	AV *av;
291		232
292	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	233	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
293	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	234	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
294	else	235	else
		236	{
		237	#if 0
		238	/* this is probably cleaner, but also slower? */
		239	CV *cp = Perl_cv_clone (cv);
		240	CvPADLIST (cv) = CvPADLIST (cp);
		241	CvPADLIST (cp) = 0;
		242	SvREFCNT_dec (cp);
		243	#else
295	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	244	CvPADLIST (cv) = coro_clone_padlist (cv);
		245	#endif
		246	}
296	}	247	}
297		248
298	STATIC void	249	static void
299	put_padlist (pTHX_ CV *cv)	250	put_padlist (CV *cv)
300	{	251	{
301	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	252	MAGIC *mg = CORO_MAGIC (cv);
		253	AV *av;
302		254
303	if (!mg)	255	if (!mg)
304	{	256	{
305	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	257	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
306	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	258	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
307	mg->mg_virtual = &vtbl_coro;	259	mg->mg_virtual = &vtbl_coro;
308	mg->mg_obj = (SV *)newAV ();	260	mg->mg_obj = (SV *)newAV ();
309	}	261	}
310		262
311	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	263	av = (AV *)mg->mg_obj;
		264
		265	if (AvFILLp (av) >= AvMAX (av))
		266	av_extend (av, AvMAX (av) + 1);
		267
		268	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
312	}	269	}
313		270
314	#define SB do {	271	#define SB do {
315	#define SE } while (0)	272	#define SE } while (0)
316		273
317	#define LOAD(state) load_state(aTHX_ (state));	274	#define LOAD(state) load_state((state));
318	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	275	#define SAVE(state,flags) save_state((state),(flags));
319		276
320	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	277	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
321		278
322	static void	279	static void
323	load_state(pTHX_ Coro__State c)	280	load_state(Coro__State c)
324	{	281	{
325	PL_dowarn = c->dowarn;	282	#define VAR(name,type) PL_ ## name = c->name;
326	PL_in_eval = c->in_eval;	283	# include "state.h"
327		284	#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	#if PERL_VERSION < 9
352	PL_retstack = c->retstack;
353	PL_retstack_ix = c->retstack_ix;
354	PL_retstack_max = c->retstack_max;
355	#endif
356	PL_curpm = c->curpm;
357	PL_curcop = c->curcop;
358	PL_top_env = c->top_env;
359		285
360	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	286	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
361	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	287	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
362	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	288	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
363		289
…		…
366	CV *cv;	292	CV *cv;
367		293
368	/* now do the ugly restore mess */	294	/* now do the ugly restore mess */
369	while ((cv = (CV *)POPs))	295	while ((cv = (CV *)POPs))
370	{	296	{
371	AV *padlist = (AV *)POPs;
372
373	if (padlist)
374	{
375	put_padlist (aTHX_ cv); /* mark this padlist as available */	297	put_padlist (cv); /* mark this padlist as available */
376	CvPADLIST(cv) = padlist;	298	CvDEPTH (cv) = PTR2IV (POPs);
377	}	299	CvPADLIST (cv) = (AV *)POPs;
378
379	++CvDEPTH(cv);
380	}	300	}
381		301
382	PUTBACK;	302	PUTBACK;
383	}	303	}
384	}	304	}
385		305
386	static void	306	static void
387	save_state(pTHX_ Coro__State c, int flags)	307	save_state(Coro__State c, int flags)
388	{	308	{
389	{	309	{
390	dSP;	310	dSP;
391	I32 cxix = cxstack_ix;	311	I32 cxix = cxstack_ix;
392	PERL_CONTEXT *ccstk = cxstack;	312	PERL_CONTEXT *ccstk = cxstack;
…		…
406	PERL_CONTEXT *cx = &ccstk[cxix--];	326	PERL_CONTEXT *cx = &ccstk[cxix--];
407		327
408	if (CxTYPE(cx) == CXt_SUB)	328	if (CxTYPE(cx) == CXt_SUB)
409	{	329	{
410	CV *cv = cx->blk_sub.cv;	330	CV *cv = cx->blk_sub.cv;
		331
411	if (CvDEPTH(cv))	332	if (CvDEPTH (cv))
412	{	333	{
413	EXTEND (SP, CvDEPTH(cv)*2);	334	EXTEND (SP, 3);
414
415	while (--CvDEPTH(cv))
416	{
417	/* this tells the restore code to increment CvDEPTH */
418	PUSHs (Nullsv);
419	PUSHs ((SV *)cv);
420	}
421		335
422	PUSHs ((SV *)CvPADLIST(cv));	336	PUSHs ((SV *)CvPADLIST(cv));
		337	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
423	PUSHs ((SV *)cv);	338	PUSHs ((SV *)cv);
424		339
425	get_padlist (aTHX_ cv); /* this is a monster */	340	CvDEPTH (cv) = 0;
		341	get_padlist (cv);
426	}	342	}
427	}	343	}
428	#ifdef CXt_FORMAT	344	#ifdef CXt_FORMAT
429	else if (CxTYPE(cx) == CXt_FORMAT)	345	else if (CxTYPE(cx) == CXt_FORMAT)
430	{	346	{
…		…
448		364
449	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	365	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
450	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	366	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
451	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	367	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
452		368
453	c->dowarn = PL_dowarn;	369	#define VAR(name,type)c->name = PL_ ## name;
454	c->in_eval = PL_in_eval;	370	# include "state.h"
455		371	#undef VAR
456	c->curstackinfo = PL_curstackinfo;
457	c->curstack = PL_curstack;
458	c->mainstack = PL_mainstack;
459	c->stack_sp = PL_stack_sp;
460	c->op = PL_op;
461	c->curpad = PL_curpad;
462	c->comppad = PL_comppad;
463	c->compcv = PL_compcv;
464	c->stack_base = PL_stack_base;
465	c->stack_max = PL_stack_max;
466	c->tmps_stack = PL_tmps_stack;
467	c->tmps_floor = PL_tmps_floor;
468	c->tmps_ix = PL_tmps_ix;
469	c->tmps_max = PL_tmps_max;
470	c->markstack = PL_markstack;
471	c->markstack_ptr = PL_markstack_ptr;
472	c->markstack_max = PL_markstack_max;
473	c->scopestack = PL_scopestack;
474	c->scopestack_ix = PL_scopestack_ix;
475	c->scopestack_max = PL_scopestack_max;
476	c->savestack = PL_savestack;
477	c->savestack_ix = PL_savestack_ix;
478	c->savestack_max = PL_savestack_max;
479	#if PERL_VERSION < 9
480	c->retstack = PL_retstack;
481	c->retstack_ix = PL_retstack_ix;
482	c->retstack_max = PL_retstack_max;
483	#endif
484	c->curpm = PL_curpm;
485	c->curcop = PL_curcop;
486	c->top_env = PL_top_env;
487	}	372	}
488		373
489	/*	374	/*
490	* allocate various perl stacks. This is an exact copy	375	* allocate various perl stacks. This is an exact copy
491	* of perl.c:init_stacks, except that it uses less memory	376	* of perl.c:init_stacks, except that it uses less memory
492	* on the (sometimes correct) assumption that coroutines do	377	* on the (sometimes correct) assumption that coroutines do
493	* not usually need a lot of stackspace.	378	* not usually need a lot of stackspace.
494	*/	379	*/
495	STATIC void	380	static void
496	coro_init_stacks (pTHX)	381	coro_init_stacks ()
497	{	382	{
498	LOCK;
499
500	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	383	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
501	PL_curstackinfo->si_type = PERLSI_MAIN;	384	PL_curstackinfo->si_type = PERLSI_MAIN;
502	PL_curstack = PL_curstackinfo->si_stack;	385	PL_curstack = PL_curstackinfo->si_stack;
503	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	386	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
504		387
…		…
525		408
526	New(54,PL_savestack,96,ANY);	409	New(54,PL_savestack,96,ANY);
527	PL_savestack_ix = 0;	410	PL_savestack_ix = 0;
528	PL_savestack_max = 96;	411	PL_savestack_max = 96;
529		412
530	#if PERL_VERSION < 9	413	#if !PERL_VERSION_ATLEAST (5,9,0)
531	New(54,PL_retstack,8,OP*);	414	New(54,PL_retstack,8,OP*);
532	PL_retstack_ix = 0;	415	PL_retstack_ix = 0;
533	PL_retstack_max = 8;	416	PL_retstack_max = 8;
534	#endif	417	#endif
535
536	UNLOCK;
537	}	418	}
538		419
539	/*	420	/*
540	* destroy the stacks, the callchain etc...	421	* destroy the stacks, the callchain etc...
541	*/	422	*/
542	STATIC void	423	static void
543	destroy_stacks(pTHX)	424	coro_destroy_stacks ()
544	{	425	{
545	if (!IN_DESTRUCT)	426	if (!IN_DESTRUCT)
546	{	427	{
547	/* is this ugly, I ask? */	428	/* is this ugly, I ask? */
548	LEAVE_SCOPE (0);	429	LEAVE_SCOPE (0);
…		…
579		460
580	Safefree (PL_tmps_stack);	461	Safefree (PL_tmps_stack);
581	Safefree (PL_markstack);	462	Safefree (PL_markstack);
582	Safefree (PL_scopestack);	463	Safefree (PL_scopestack);
583	Safefree (PL_savestack);	464	Safefree (PL_savestack);
584	#if PERL_VERSION < 9	465	#if !PERL_VERSION_ATLEAST (5,9,0)
585	Safefree (PL_retstack);	466	Safefree (PL_retstack);
586	#endif	467	#endif
587	}	468	}
588		469
589	static void	470	static void
590	allocate_stack (Coro__State ctx, int alloc)	471	setup_coro (struct coro *coro)
591	{
592	coro_stack *stack;
593
594	New (0, stack, 1, coro_stack);
595
596	stack->refcnt = 1;
597	stack->usecnt = 1;
598	stack->gencnt = ctx->gencnt = 0;
599
600	if (alloc)
601	{
602	#if HAVE_MMAP
603	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
604	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
605	if (stack->sptr == (void *)-1)
606	#endif
607	{
608	/*FIXME*//*D*//* reasonable stack size! */
609	stack->ssize = - (STACKSIZE * sizeof (long));
610	New (0, stack->sptr, STACKSIZE, long);
611	}
612	}
613	else
614	stack->sptr = 0;
615
616	ctx->stack = stack;
617	}
618
619	static void
620	deallocate_stack (Coro__State ctx)
621	{
622	coro_stack *stack = ctx->stack;
623
624	ctx->stack = 0;
625
626	if (stack)
627	{
628	if (!--stack->refcnt)
629	{
630	#ifdef HAVE_MMAP
631	if (stack->ssize > 0 && stack->sptr)
632	munmap (stack->sptr, stack->ssize);
633	else
634	#endif
635	Safefree (stack->sptr);
636
637	Safefree (stack);
638	}
639	else if (ctx->gencnt == stack->gencnt)
640	--stack->usecnt;
641	}
642	}
643
644	static void
645	setup_coro (void *arg)
646	{	472	{
647	/*	473	/*
648	* emulate part of the perl startup here.	474	* emulate part of the perl startup here.
649	*/	475	*/
650	dTHX;
651	dSP;
652	Coro__State ctx = (Coro__State)arg;
653	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
654		476
655	coro_init_stacks (aTHX);	477	coro_init_stacks ();
		478
656	/*PL_curcop = 0;*/	479	PL_curcop = 0;
657	/*PL_in_eval = PL_in_eval;*/ /* inherit */	480	PL_in_eval = 0;
		481	PL_curpm = 0;
		482
		483	{
		484	dSP;
		485	LOGOP myop;
		486
		487	/* I have no idea why this is needed, but it is */
		488	PUSHMARK (SP);
		489
658	SvREFCNT_dec (GvAV (PL_defgv));	490	SvREFCNT_dec (GvAV (PL_defgv));
659	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	491	GvAV (PL_defgv) = coro->args; coro->args = 0;
660		492
661	SPAGAIN;
662
663	if (ctx->stack)
664	{
665	ctx->cursp = 0;
666
667	PUSHMARK(SP);
668	PUTBACK;
669	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
670
671	if (SvTRUE (ERRSV))
672	croak (NULL);
673	else
674	croak ("FATAL: CCTXT coroutine returned!");
675	}
676	else
677	{
678	UNOP myop;
679
680	PL_op = (OP *)&myop;
681
682	Zero(&myop, 1, UNOP);	493	Zero (&myop, 1, LOGOP);
683	myop.op_next = Nullop;	494	myop.op_next = Nullop;
684	myop.op_flags = OPf_WANT_VOID;	495	myop.op_flags = OPf_WANT_VOID;
685		496
		497	PL_op = (OP *)&myop;
		498
686	PUSHMARK(SP);	499	PUSHMARK (SP);
687	XPUSHs (sub_init);	500	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
688	/*
689	* the next line is slightly wrong, as PL_op->op_next
690	* is actually being executed so we skip the first op.
691	* that doesn't matter, though, since it is only
692	* pp_nextstate and we never return...
693	* ah yes, and I don't care anyways ;)
694	*/
695	PUTBACK;	501	PUTBACK;
696	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	502	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
697	SPAGAIN;	503	SPAGAIN;
698		504
699	ENTER; /* necessary e.g. for dounwind */	505	ENTER; /* necessary e.g. for dounwind */
700	}	506	}
701	}	507	}
702		508
703	static void	509	static void
704	continue_coro (void *arg)	510	free_coro_mortal ()
705	{	511	{
706	/*
707	* this is a _very_ stripped down perl interpreter ;)
708	*/
709	dTHX;
710	Coro__State ctx = (Coro__State)arg;
711	JMPENV coro_start_env;
712
713	PL_top_env = &ctx->start_env;
714
715	ctx->cursp = 0;
716	PL_op = PL_op->op_next;
717	CALLRUNOPS(aTHX);
718
719	abort ();
720	}
721
722	STATIC void
723	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
724	{
725	dSTACKLEVEL;
726
727	if (prev != next)
728	{
729	if (next->mainstack)
730	{
731	LOCK;
732	SAVE (prev, flags);
733	LOAD (next);
734	UNLOCK;
735
736	/* mark this state as in-use */
737	next->mainstack = 0;
738	next->tmps_ix = -2;
739
740	/* stacklevel changed? if yes, grab the stack for us! */
741	if (flags & TRANSFER_SAVE_CCTXT)
742	{
743	if (!prev->stack)
744	allocate_stack (prev, 0);
745	else if (prev->cursp != stacklevel
746	&& prev->stack->usecnt > 1)
747	{
748	prev->gencnt = ++prev->stack->gencnt;
749	prev->stack->usecnt = 1;
750	}
751
752	/* has our stack been invalidated? */
753	if (next->stack && next->stack->gencnt != next->gencnt)
754	{
755	deallocate_stack (next);
756	allocate_stack (next, 1);
757	coro_create (&(next->stack->cctx),
758	continue_coro, (void *)next,
759	next->stack->sptr, labs (next->stack->ssize));
760	}
761
762	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
763	prev->cursp = stacklevel;
764	/* don't add any code here */
765	}
766	else
767	next->cursp = stacklevel;
768	}
769	else if (next->tmps_ix == -2)
770	croak ("tried to transfer to running coroutine");
771	else
772	{
773	LOCK;
774	SAVE (prev, -1); /* first get rid of the old state */
775	UNLOCK;
776
777	if (flags & TRANSFER_SAVE_CCTXT)
778	{
779	if (!prev->stack)
780	allocate_stack (prev, 0);
781
782	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
783	{
784	PL_top_env = &next->start_env;
785
786	setup_coro (next);
787	next->cursp = stacklevel;
788
789	prev->stack->refcnt++;
790	prev->stack->usecnt++;
791	next->stack = prev->stack;
792	next->gencnt = prev->gencnt;
793	}
794	else
795	{
796	assert (!next->stack);
797	allocate_stack (next, 1);
798	coro_create (&(next->stack->cctx),
799	setup_coro, (void *)next,
800	next->stack->sptr, labs (next->stack->ssize));
801	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
802	prev->cursp = stacklevel;
803	/* don't add any code here */
804	}
805	}
806	else
807	{
808	setup_coro (next);
809	next->cursp = stacklevel;
810	}
811	}
812	}
813
814	LOCK;
815	if (coro_mortal)	512	if (coro_mortal)
816	{	513	{
817	SvREFCNT_dec (coro_mortal);	514	SvREFCNT_dec (coro_mortal);
818	coro_mortal = 0;	515	coro_mortal = 0;
819	}	516	}
		517	}
		518
		519	static void NOINLINE
		520	prepare_cctx (coro_cctx *cctx)
		521	{
		522	dSP;
		523	LOGOP myop;
		524
		525	Zero (&myop, 1, LOGOP);
		526	myop.op_next = PL_op;
		527	myop.op_flags = OPf_WANT_VOID;
		528
		529	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		530
		531	PUSHMARK (SP);
		532	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		533	PUTBACK;
		534	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		535	SPAGAIN;
		536	}
		537
		538	static void
		539	coro_run (void *arg)
		540	{
		541	/* coro_run is the alternative epilogue of transfer() */
820	UNLOCK;	542	UNLOCK;
821	}
822		543
823	#define SV_CORO(sv,func) \	544	/*
824	do { \	545	* this is a _very_ stripped down perl interpreter ;)
825	if (SvROK (sv)) \	546	*/
826	sv = SvRV (sv); \	547	PL_top_env = &PL_start_env;
827	\
828	if (SvTYPE (sv) == SVt_PVHV) \
829	{ \
830	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
831	\
832	if (!he) \
833	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
834	\
835	(sv) = SvRV (HeVAL(he)); \
836	} \
837	\
838	/* must also be changed inside Coro::Cont::yield */ \
839	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
840	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
841	\
842	} while(0)
843		548
844	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	549	/* inject call to cctx_init */
		550	prepare_cctx ((coro_cctx *)arg);
845		551
		552	/* somebody will hit me for both perl_run and PL_restartop */
		553	perl_run (PL_curinterp);
		554
		555	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		556	abort ();
		557	}
		558
		559	static coro_cctx *
		560	cctx_new ()
		561	{
		562	coro_cctx *cctx;
		563
		564	++cctx_count;
		565
		566	New (0, cctx, 1, coro_cctx);
		567
		568	#if HAVE_MMAP
		569
		570	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		571	/* mmap suppsedly does allocate-on-write for us */
		572	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		573
		574	if (cctx->sptr == (void *)-1)
		575	{
		576	perror ("FATAL: unable to mmap stack for coroutine");
		577	_exit (EXIT_FAILURE);
		578	}
		579
		580	# if STACKGUARD
		581	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		582	# endif
		583
		584	#else
		585
		586	cctx->ssize = STACKSIZE * (long)sizeof (long);
		587	New (0, cctx->sptr, STACKSIZE, long);
		588
		589	if (!cctx->sptr)
		590	{
		591	perror ("FATAL: unable to malloc stack for coroutine");
		592	_exit (EXIT_FAILURE);
		593	}
		594
		595	#endif
		596
		597	#if USE_VALGRIND
		598	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		599	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		600	cctx->ssize + (char *)cctx->sptr
		601	);
		602	#endif
		603
		604	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		605
		606	return cctx;
		607	}
		608
		609	static void
		610	cctx_free (coro_cctx *cctx)
		611	{
		612	if (!cctx)
		613	return;
		614
		615	--cctx_count;
		616
		617	#if USE_VALGRIND
		618	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		619	#endif
		620
		621	#if HAVE_MMAP
		622	munmap (cctx->sptr, cctx->ssize);
		623	#else
		624	Safefree (cctx->sptr);
		625	#endif
		626
		627	Safefree (cctx);
		628	}
		629
		630	static coro_cctx *
		631	cctx_get ()
		632	{
		633	coro_cctx *cctx;
		634
		635	if (cctx_first)
		636	{
		637	--cctx_idle;
		638	cctx = cctx_first;
		639	cctx_first = cctx->next;
		640	}
		641	else
		642	{
		643	cctx = cctx_new ();
		644	PL_op = PL_op->op_next;
		645	}
		646
		647	return cctx;
		648	}
		649
		650	static void
		651	cctx_put (coro_cctx *cctx)
		652	{
		653	++cctx_idle;
		654	cctx->next = cctx_first;
		655	cctx_first = cctx;
		656	}
		657
		658	/* never call directly, always through the coro_state_transfer global variable */
		659	static void NOINLINE
		660	transfer (struct coro *prev, struct coro *next, int flags)
		661	{
		662	dSTACKLEVEL;
		663
		664	/* sometimes transfer is only called to set idle_sp */
		665	if (flags == TRANSFER_SET_STACKLEVEL)
		666	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		667	else if (prev != next)
		668	{
		669	coro_cctx *prev__cctx;
		670
		671	LOCK;
		672
		673	if (next->mainstack)
		674	{
		675	/* coroutine already started */
		676	SAVE (prev, flags);
		677	LOAD (next);
		678	}
		679	else
		680	{
		681	/* need to start coroutine */
		682	/* first get rid of the old state */
		683	SAVE (prev, -1);
		684	/* setup coroutine call */
		685	setup_coro (next);
		686	/* need a stack */
		687	next->cctx = 0;
		688	}
		689
		690	if (!prev->cctx)
		691	/* create a new empty context */
		692	Newz (0, prev->cctx, 1, coro_cctx);
		693
		694	prev__cctx = prev->cctx;
		695
		696	/* possibly "free" the cctx */
		697	if (prev__cctx->idle_sp == STACKLEVEL)
		698	{
		699	cctx_put (prev__cctx);
		700	prev->cctx = 0;
		701	}
		702
		703	if (!next->cctx)
		704	next->cctx = cctx_get ();
		705
		706	if (prev__cctx != next->cctx)
		707	{
		708	prev__cctx->top_env = PL_top_env;
		709	PL_top_env = next->cctx->top_env;
		710	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		711	}
		712
		713	free_coro_mortal ();
		714
		715	UNLOCK;
		716	}
		717	}
		718
		719	struct transfer_args
		720	{
		721	struct coro *prev, *next;
		722	int flags;
		723	};
		724
		725	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		726
		727	static void
		728	coro_state_destroy (struct coro *coro)
		729	{
		730	if (coro->refcnt--)
		731	return;
		732
		733	if (coro->mainstack && coro->mainstack != main_mainstack)
		734	{
		735	struct coro temp;
		736
		737	SAVE ((&temp), TRANSFER_SAVE_ALL);
		738	LOAD (coro);
		739
		740	coro_destroy_stacks ();
		741
		742	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		743
		744	coro->mainstack = 0;
		745	}
		746
		747	cctx_free (coro->cctx);
		748	SvREFCNT_dec (coro->args);
		749	Safefree (coro);
		750	}
		751
846	static void	752	static int
		753	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		754	{
		755	struct coro *coro = (struct coro *)mg->mg_ptr;
		756	mg->mg_ptr = 0;
		757
		758	coro_state_destroy (coro);
		759
		760	return 0;
		761	}
		762
		763	static int
		764	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		765	{
		766	struct coro *coro = (struct coro *)mg->mg_ptr;
		767
		768	++coro->refcnt;
		769
		770	return 0;
		771	}
		772
		773	static MGVTBL coro_state_vtbl = {
		774	0, 0, 0, 0,
		775	coro_state_clear,
		776	0,
		777	#ifdef MGf_DUP
		778	coro_state_dup,
		779	#else
		780	# define MGf_DUP 0
		781	#endif
		782	};
		783
		784	static struct coro *
		785	SvSTATE (SV *coro)
		786	{
		787	HV *stash;
		788	MAGIC *mg;
		789
		790	if (SvROK (coro))
		791	coro = SvRV (coro);
		792
		793	stash = SvSTASH (coro);
		794	if (stash != coro_stash && stash != coro_state_stash)
		795	{
		796	/* very slow, but rare, check */
		797	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		798	croak ("Coro::State object required");
		799	}
		800
		801	mg = SvMAGIC (coro);
		802	assert (mg->mg_type == PERL_MAGIC_ext);
		803	return (struct coro *)mg->mg_ptr;
		804	}
		805
		806	static void
		807	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		808	{
		809	ta->prev = SvSTATE (prev);
		810	ta->next = SvSTATE (next);
		811	ta->flags = flags;
		812	}
		813
		814	static void
847	api_transfer(pTHX_ SV *prev, SV *next, int flags)	815	api_transfer (SV *prev, SV *next, int flags)
848	{	816	{
849	SV_CORO (prev, "Coro::transfer");	817	dTHX;
850	SV_CORO (next, "Coro::transfer");	818	struct transfer_args ta;
851		819
852	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	820	prepare_transfer (&ta, prev, next, flags);
		821	TRANSFER (ta);
853	}	822	}
854		823
855	/** Coro ********************************************************************/	824	/** Coro ********************************************************************/
856		825
857	#define PRIO_MAX 3	826	#define PRIO_MAX 3
…		…
861	#define PRIO_IDLE -3	830	#define PRIO_IDLE -3
862	#define PRIO_MIN -4	831	#define PRIO_MIN -4
863		832
864	/* for Coro.pm */	833	/* for Coro.pm */
865	static GV *coro_current, *coro_idle;	834	static GV *coro_current, *coro_idle;
866	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	835	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
867	static int coro_nready;	836	static int coro_nready;
868		837
869	static void	838	static void
870	coro_enq (pTHX_ SV *sv)	839	coro_enq (SV *sv)
871	{	840	{
872	SV **xprio;
873	int prio;	841	int prio;
874		842
875	if (SvTYPE (sv) != SVt_PVHV)	843	if (SvTYPE (sv) != SVt_PVHV)
876	croak ("Coro::ready tried to enqueue something that is not a coroutine");	844	croak ("Coro::ready tried to enqueue something that is not a coroutine");
877		845
878	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);	846	prio = SvSTATE (sv)->prio;
879	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
880
881	prio = prio > PRIO_MAX ? PRIO_MAX
882	: prio < PRIO_MIN ? PRIO_MIN
883	: prio;
884		847
885	av_push (coro_ready [prio - PRIO_MIN], sv);	848	av_push (coro_ready [prio - PRIO_MIN], sv);
886	coro_nready++;	849	coro_nready++;
887	}	850	}
888		851
889	static SV *	852	static SV *
890	coro_deq (pTHX_ int min_prio)	853	coro_deq (int min_prio)
891	{	854	{
892	int prio = PRIO_MAX - PRIO_MIN;	855	int prio = PRIO_MAX - PRIO_MIN;
893		856
894	min_prio -= PRIO_MIN;	857	min_prio -= PRIO_MIN;
895	if (min_prio < 0)	858	if (min_prio < 0)
896	min_prio = 0;	859	min_prio = 0;
897		860
898	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	861	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
899	if (av_len (coro_ready[prio]) >= 0)	862	if (AvFILLp (coro_ready [prio]) >= 0)
900	{	863	{
901	coro_nready--;	864	coro_nready--;
902	return av_shift (coro_ready[prio]);	865	return av_shift (coro_ready [prio]);
903	}	866	}
904		867
905	return 0;	868	return 0;
906	}	869	}
907		870
…		…
912		875
913	if (SvROK (coro))	876	if (SvROK (coro))
914	coro = SvRV (coro);	877	coro = SvRV (coro);
915		878
916	LOCK;	879	LOCK;
917	coro_enq (aTHX_ SvREFCNT_inc (coro));	880	coro_enq (SvREFCNT_inc (coro));
918	UNLOCK;	881	UNLOCK;
919	}	882	}
920		883
921	static void	884	static void
		885	prepare_schedule (struct transfer_args *ta)
		886	{
		887	SV *current, *prev, *next;
		888
		889	current = GvSV (coro_current);
		890
		891	for (;;)
		892	{
		893	LOCK;
		894	next = coro_deq (PRIO_MIN);
		895	UNLOCK;
		896
		897	if (next)
		898	break;
		899
		900	{
		901	dSP;
		902
		903	ENTER;
		904	SAVETMPS;
		905
		906	PUSHMARK (SP);
		907	PUTBACK;
		908	call_sv (GvSV (coro_idle), G_DISCARD);
		909
		910	FREETMPS;
		911	LEAVE;
		912	}
		913	}
		914
		915	prev = SvRV (current);
		916	SvRV (current) = next;
		917
		918	/* free this only after the transfer */
		919	LOCK;
		920	free_coro_mortal ();
		921	UNLOCK;
		922	coro_mortal = prev;
		923
		924	ta->prev = SvSTATE (prev);
		925	ta->next = SvSTATE (next);
		926	ta->flags = TRANSFER_SAVE_ALL;
		927	}
		928
		929	static void
		930	prepare_cede (struct transfer_args *ta)
		931	{
		932	LOCK;
		933	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		934	UNLOCK;
		935
		936	prepare_schedule (ta);
		937	}
		938
		939	static void
922	api_schedule (void)	940	api_schedule (void)
923	{	941	{
924	dTHX;	942	dTHX;
		943	struct transfer_args ta;
925		944
926	SV *prev, *next;	945	prepare_schedule (&ta);
927		946	TRANSFER (ta);
928	LOCK;
929
930	prev = SvRV (GvSV (coro_current));
931	next = coro_deq (aTHX_ PRIO_MIN);
932
933	if (!next)
934	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
935
936	/* free this only after the transfer */
937	coro_mortal = prev;
938	SV_CORO (prev, "Coro::schedule");
939
940	SvRV (GvSV (coro_current)) = next;
941
942	SV_CORO (next, "Coro::schedule");
943
944	UNLOCK;
945
946	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
947	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
948	}	947	}
949		948
950	static void	949	static void
951	api_cede (void)	950	api_cede (void)
952	{	951	{
953	dTHX;	952	dTHX;
		953	struct transfer_args ta;
954		954
955	LOCK;	955	prepare_cede (&ta);
956	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	956	TRANSFER (ta);
957	UNLOCK;
958
959	api_schedule ();
960	}	957	}
961		958
962	MODULE = Coro::State PACKAGE = Coro::State	959	MODULE = Coro::State PACKAGE = Coro::State
963		960
964	PROTOTYPES: ENABLE	961	PROTOTYPES: DISABLE
965		962
966	BOOT:	963	BOOT:
967	{ /* {} necessary for stoopid perl-5.6.x */	964	{
968	#ifdef USE_ITHREADS	965	#ifdef USE_ITHREADS
969	MUTEX_INIT (&coro_mutex);	966	MUTEX_INIT (&coro_mutex);
970	#endif	967	#endif
		968	BOOT_PAGESIZE;
971		969
972	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
973	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
974	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	970	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
975		971
976	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	972	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
977	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	973	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
978	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	974	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
979	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
980		975
981	main_mainstack = PL_mainstack;	976	main_mainstack = PL_mainstack;
982		977
983	coroapi.ver = CORO_API_VERSION;	978	coroapi.ver = CORO_API_VERSION;
984	coroapi.transfer = api_transfer;	979	coroapi.transfer = api_transfer;
985	}
986		980
987	Coro::State	981	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
988	_newprocess(args)	982	}
989	SV * args	983
990	PROTOTYPE: $	984	SV *
		985	new (char *klass, ...)
991	CODE:	986	CODE:
992	Coro__State coro;	987	{
		988	struct coro *coro;
		989	HV *hv;
		990	int i;
993		991
994	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
995	croak ("Coro::State::_newprocess expects an arrayref");
996
997	Newz (0, coro, 1, struct coro);	992	Newz (0, coro, 1, struct coro);
		993	coro->args = newAV ();
998		994
999	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	995	hv = newHV ();
1000	/*coro->mainstack = 0; *//*actual work is done inside transfer */	996	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1001	/*coro->stack = 0;*/	997	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1002		998
1003	/* same as JMPENV_BOOTSTRAP */	999	for (i = 1; i < items; i++)
1004	/* we might be able to recycle start_env, but safe is safe */	1000	av_push (coro->args, newSVsv (ST (i)));
1005	/*Zero(&coro->start_env, 1, JMPENV);*/	1001	}
1006	coro->start_env.je_ret = -1;
1007	coro->start_env.je_mustcatch = TRUE;
1008
1009	RETVAL = coro;
1010	OUTPUT:	1002	OUTPUT:
1011	RETVAL	1003	RETVAL
1012		1004
1013	void	1005	void
1014	transfer(prev, next, flags)	1006	_set_stacklevel (...)
1015	SV *prev	1007	ALIAS:
1016	SV *next	1008	Coro::State::transfer = 1
1017	int flags	1009	Coro::schedule = 2
1018	PROTOTYPE: @	1010	Coro::cede = 3
		1011	Coro::Cont::yield = 4
1019	CODE:	1012	CODE:
1020	PUTBACK;	1013	{
1021	SV_CORO (next, "Coro::transfer");	1014	struct transfer_args ta;
1022	SV_CORO (prev, "Coro::transfer");	1015
1023	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1016	switch (ix)
1024	SPAGAIN;	1017	{
		1018	case 0:
		1019	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1020	ta.next = 0;
		1021	ta.flags = TRANSFER_SET_STACKLEVEL;
		1022	break;
		1023
		1024	case 1:
		1025	if (items != 3)
		1026	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1027
		1028	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1029	break;
		1030
		1031	case 2:
		1032	prepare_schedule (&ta);
		1033	break;
		1034
		1035	case 3:
		1036	prepare_cede (&ta);
		1037	break;
		1038
		1039	case 4:
		1040	{
		1041	SV *yieldstack;
		1042	SV *sv;
		1043	AV *defav = GvAV (PL_defgv);
		1044
		1045	yieldstack = *hv_fetch (
		1046	(HV *)SvRV (GvSV (coro_current)),
		1047	"yieldstack", sizeof ("yieldstack") - 1,
		1048	0
		1049	);
		1050
		1051	/* set up @_ -- ugly */
		1052	av_clear (defav);
		1053	av_fill (defav, items - 1);
		1054	while (items--)
		1055	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1056
		1057	sv = av_pop ((AV *)SvRV (yieldstack));
		1058	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1059	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1060	ta.flags = 0;
		1061	SvREFCNT_dec (sv);
		1062	}
		1063	break;
		1064
		1065	}
		1066
		1067	TRANSFER (ta);
		1068	}
1025		1069
1026	void	1070	void
1027	DESTROY(coro)	1071	_clone_state_from (SV *dst, SV *src)
1028	Coro::State coro	1072	CODE:
1029	CODE:	1073	{
		1074	struct coro *coro_src = SvSTATE (src);
1030		1075
1031	if (coro->mainstack && coro->mainstack != main_mainstack)	1076	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1032	{
1033	struct coro temp;
1034		1077
1035	PUTBACK;	1078	++coro_src->refcnt;
1036	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1079	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1037	LOAD (aTHX_ coro);	1080	}
1038	SPAGAIN;
1039
1040	destroy_stacks (aTHX);
1041
1042	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1043	SPAGAIN;
1044
1045	coro->mainstack = 0;
1046	}
1047
1048	deallocate_stack (coro);
1049	SvREFCNT_dec (coro->args);
1050	Safefree (coro);
1051		1081
1052	void	1082	void
1053	_exit(code)	1083	_exit (code)
1054	int code	1084	int code
1055	PROTOTYPE: $	1085	PROTOTYPE: $
1056	CODE:	1086	CODE:
1057	_exit (code);	1087	_exit (code);
1058		1088
1059	MODULE = Coro::State PACKAGE = Coro::Cont	1089	int
		1090	cctx_count ()
		1091	CODE:
		1092	RETVAL = cctx_count;
		1093	OUTPUT:
		1094	RETVAL
1060		1095
1061	# this is slightly dirty (should expose a c-level api)	1096	int
1062		1097	cctx_idle ()
1063	void	1098	CODE:
1064	yield(...)	1099	RETVAL = cctx_idle;
1065	PROTOTYPE: @	1100	OUTPUT:
1066	CODE:	1101	RETVAL
1067	SV *yieldstack;
1068	SV *sv;
1069	AV *defav = GvAV (PL_defgv);
1070	struct coro *prev, *next;
1071
1072	yieldstack = *hv_fetch (
1073	(HV *)SvRV (GvSV (coro_current)),
1074	"yieldstack", sizeof ("yieldstack") - 1,
1075	0
1076	);
1077
1078	/* set up @_ -- ugly */
1079	av_clear (defav);
1080	av_fill (defav, items - 1);
1081	while (items--)
1082	av_store (defav, items, SvREFCNT_inc (ST(items)));
1083
1084	sv = av_pop ((AV *)SvRV (yieldstack));
1085	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1086	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1087	SvREFCNT_dec (sv);
1088
1089	transfer (aTHX_ prev, next, 0);
1090		1102
1091	MODULE = Coro::State PACKAGE = Coro	1103	MODULE = Coro::State PACKAGE = Coro
1092		1104
1093	# this is slightly dirty (should expose a c-level api)
1094
1095	BOOT:	1105	BOOT:
1096	{	1106	{
1097	int i;	1107	int i;
		1108
1098	HV *stash = gv_stashpv ("Coro", TRUE);	1109	coro_stash = gv_stashpv ("Coro", TRUE);
1099		1110
1100	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1111	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1101	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1112	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1102	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1113	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1103	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1114	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1104	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1115	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1105	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1116	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1106		1117
1107	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1118	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1108	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1119	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1109		1120
1110	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1121	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1118	coroapi.ready = api_ready;	1129	coroapi.ready = api_ready;
1119	coroapi.nready = &coro_nready;	1130	coroapi.nready = &coro_nready;
1120	coroapi.current = coro_current;	1131	coroapi.current = coro_current;
1121		1132
1122	GCoroAPI = &coroapi;	1133	GCoroAPI = &coroapi;
1123	sv_setiv(sv, (IV)&coroapi);	1134	sv_setiv (sv, (IV)&coroapi);
1124	SvREADONLY_on(sv);	1135	SvREADONLY_on (sv);
1125	}	1136	}
1126	}	1137	}
1127		1138
1128	#if !PERL_MICRO	1139	int
		1140	prio (Coro::State coro, int newprio = 0)
		1141	ALIAS:
		1142	nice = 1
		1143	CODE:
		1144	{
		1145	RETVAL = coro->prio;
		1146
		1147	if (items > 1)
		1148	{
		1149	if (ix)
		1150	newprio += coro->prio;
		1151
		1152	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1153	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1154
		1155	coro->prio = newprio;
		1156	}
		1157	}
1129		1158
1130	void	1159	void
1131	ready(self)	1160	ready (SV *self)
1132	SV * self
1133	PROTOTYPE: $	1161	PROTOTYPE: $
1134	CODE:	1162	CODE:
1135	api_ready (self);	1163	api_ready (self);
1136		1164
1137	#endif
1138
1139	int	1165	int
1140	nready(...)	1166	nready (...)
1141	PROTOTYPE:	1167	PROTOTYPE:
1142	CODE:	1168	CODE:
1143	RETVAL = coro_nready;	1169	RETVAL = coro_nready;
1144	OUTPUT:	1170	OUTPUT:
1145	RETVAL	1171	RETVAL
1146		1172
1147	void	1173	MODULE = Coro::State PACKAGE = Coro::AIO
1148	schedule(...)
1149	PROTOTYPE:
1150	CODE:
1151	api_schedule ();
1152		1174
1153	void
1154	cede(...)
1155	PROTOTYPE:
1156	CODE:
1157	api_cede ();
1158
1159	# and these are hacks
1160	SV *	1175	SV *
1161	_aio_get_state ()	1176	_get_state ()
1162	CODE:	1177	CODE:
1163	{	1178	{
1164	struct {	1179	struct {
1165	int errorno;	1180	int errorno;
1166	int laststype;	1181	int laststype;
…		…
1177	}	1192	}
1178	OUTPUT:	1193	OUTPUT:
1179	RETVAL	1194	RETVAL
1180		1195
1181	void	1196	void
1182	_aio_set_state (char *data_)	1197	_set_state (char *data_)
1183	PROTOTYPE: $	1198	PROTOTYPE: $
1184	CODE:	1199	CODE:
1185	{	1200	{
1186	struct {	1201	struct {
1187	int errorno;	1202	int errorno;

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