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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.53 by pcg, Sat Feb 14 12:39:41 2004 UTC vs.
Revision 1.110 by root, Tue Nov 28 23:08:07 2006 UTC

		1	#include "libcoro/coro.c"
		2
1	#include "EXTERN.h"	3	#include "EXTERN.h"
2	#include "perl.h"	4	#include "perl.h"
3	#include "XSUB.h"	5	#include "XSUB.h"
4		6
5	#include "patchlevel.h"	7	#include "patchlevel.h"
6		8
7	#if PATCHLEVEL < 6	9	#if USE_VALGRIND
		10	# include <valgrind/valgrind.h>
		11	#endif
		12
		13	#define PERL_VERSION_ATLEAST(a,b,c) \
		14	(PERL_REVISION > (a) \
		15	|| (PERL_REVISION == (a) \
		16	&& (PERL_VERSION > (b) \
		17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		18
		19	#if !PERL_VERSION_ATLEAST (5,6,0)
8	# ifndef PL_ppaddr	20	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	21	# define PL_ppaddr ppaddr
10	# endif	22	# endif
11	# ifndef call_sv	23	# ifndef call_sv
12	# define call_sv perl_call_sv	24	# define call_sv perl_call_sv
…		…
23	# ifndef IS_PADCONST	35	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	36	# define IS_PADCONST(v) 0
25	# endif	37	# endif
26	#endif	38	#endif
27		39
28	#include "libcoro/coro.c"
29
30	#include <signal.h>	40	#include <stdio.h>
		41	#include <errno.h>
		42
		43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		44	# undef STACKGUARD
		45	#endif
		46
		47	#ifndef STACKGUARD
		48	# define STACKGUARD 0
		49	#endif
31		50
32	#ifdef HAVE_MMAP	51	#ifdef HAVE_MMAP
33	# include <unistd.h>	52	# include <unistd.h>
34	# include <sys/mman.h>	53	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
…		…
37	# define MAP_ANONYMOUS MAP_ANON	56	# define MAP_ANONYMOUS MAP_ANON
38	# else	57	# else
39	# undef HAVE_MMAP	58	# undef HAVE_MMAP
40	# endif	59	# endif
41	# endif	60	# endif
		61	# include <limits.h>
		62	# ifndef PAGESIZE
		63	# define PAGESIZE pagesize
		64	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		65	static long pagesize;
		66	# else
		67	# define BOOT_PAGESIZE (void)0
42	#endif	68	# endif
43		69	#else
44	#define SUB_INIT "Coro::State::initialize"	70	# define PAGESIZE 0
45	#define UCORO_STATE "_coro_state"	71	# define BOOT_PAGESIZE (void)0
		72	#endif
46		73
47	/* 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
48	* 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
49	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
50	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
51		79
52	#define IN_DESTRUCT (PL_main_cv == Nullcv)	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
53		81
54	#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))
55		89
56	#include "CoroAPI.h"	90	#include "CoroAPI.h"
57		91
		92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
		93
		94	#ifdef USE_ITHREADS
		95	static perl_mutex coro_mutex;
		96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		98	#else
		99	# define LOCK (void)0
		100	# define UNLOCK (void)0
		101	#endif
		102
58	static struct CoroAPI coroapi;	103	static struct CoroAPI coroapi;
		104	static AV *main_mainstack; /* used to differentiate between $main and others */
		105	static HV *coro_state_stash, *coro_stash;
		106	static SV *coro_mortal; /* will be freed after next transfer */
59		107
60	/* 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 */
61	typedef struct {	112	typedef struct coro_cctx {
62	int refcnt; /* pointer reference counter */	113	struct coro_cctx *next;
63	int usecnt; /* shared by how many coroutines */
64	int gencnt; /* generation counter */
65		114
66	coro_context cctx;	115	/* the stack */
67
68	void *sptr;	116	void *sptr;
69	long ssize; /* positive == mmap, otherwise malloc */	117	long ssize; /* positive == mmap, otherwise malloc */
70	} coro_stack;
71		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 */
72	struct coro {	130	struct coro {
73	/* the top-level JMPENV for each coroutine, needed to catch dies. */	131	/* the c coroutine allocated to this perl coroutine, if any */
74	JMPENV start_env;	132	coro_cctx *cctx;
75		133
76	/* the optional C context */	134	/* data associated with this coroutine (initial args) */
77	coro_stack *stack;	135	AV *args;
78	void *cursp;
79	int gencnt;	136	int refcnt;
80		137
81	/* optionally saved, might be zero */	138	/* optionally saved, might be zero */
82	AV *defav;	139	AV *defav;
83	SV *defsv;	140	SV *defsv;
84	SV *errsv;	141	SV *errsv;
85		142
86	/* saved global state not related to stacks */	143	#define VAR(name,type) type name;
87	U8 dowarn;	144	# include "state.h"
88	I32 in_eval;	145	#undef VAR
89		146
90	/* the stacks and related info (callchain etc..) */	147	/* coro process data */
91	PERL_SI *curstackinfo;	148	int prio;
92	AV *curstack;
93	AV *mainstack;
94	SV **stack_sp;
95	OP *op;
96	SV **curpad;
97	AV *comppad;
98	SV **stack_base;
99	SV **stack_max;
100	SV **tmps_stack;
101	I32 tmps_floor;
102	I32 tmps_ix;
103	I32 tmps_max;
104	I32 *markstack;
105	I32 *markstack_ptr;
106	I32 *markstack_max;
107	I32 *scopestack;
108	I32 scopestack_ix;
109	I32 scopestack_max;
110	ANY *savestack;
111	I32 savestack_ix;
112	I32 savestack_max;
113	OP **retstack;
114	I32 retstack_ix;
115	I32 retstack_max;
116	COP *curcop;
117	JMPENV *top_env;
118
119	/* data associated with this coroutine (initial args) */
120	AV *args;
121	};	149	};
122		150
123	typedef struct coro *Coro__State;	151	typedef struct coro *Coro__State;
124	typedef struct coro *Coro__State_or_hashref;	152	typedef struct coro *Coro__State_or_hashref;
125		153
126	static AV *main_mainstack; /* used to differentiate between $main and others */	154	static AV *
127	static HV *coro_state_stash;	155	coro_clone_padlist (CV *cv)
128	static SV *ucoro_state_sv;
129	static U32 ucoro_state_hash;
130	static HV *padlist_cache;
131	static SV *coro_mortal; /* will be freed after next transfer */
132
133	/* mostly copied from op.c:cv_clone2 */
134	STATIC AV *
135	clone_padlist (AV *protopadlist)
136	{	156	{
137	AV *av;	157	AV *padlist = CvPADLIST (cv);
138	I32 ix;
139	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
140	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
141	SV **pname = AvARRAY (protopad_name);
142	SV **ppad = AvARRAY (protopad);
143	I32 fname = AvFILLp (protopad_name);
144	I32 fpad = AvFILLp (protopad);
145	AV *newpadlist, *newpad_name, *newpad;	158	AV *newpadlist, *newpad;
146	SV **npad;
147
148	newpad_name = newAV ();
149	for (ix = fname; ix >= 0; ix--)
150	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
151
152	newpad = newAV ();
153	av_fill (newpad, AvFILLp (protopad));
154	npad = AvARRAY (newpad);
155		159
156	newpadlist = newAV ();	160	newpadlist = newAV ();
157	AvREAL_off (newpadlist);	161	AvREAL_off (newpadlist);
158	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)));
159	av_store (newpadlist, 1, (SV *) newpad);	171	av_store (newpadlist, 1, (SV *)newpad);
160
161	av = newAV (); /* will be @_ */
162	av_extend (av, 0);
163	av_store (newpad, 0, (SV *) av);
164	AvFLAGS (av) = AVf_REIFY;
165
166	for (ix = fpad; ix > 0; ix--)
167	{
168	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
169	if (namesv && namesv != &PL_sv_undef)
170	{
171	char *name = SvPVX (namesv); /* XXX */
172	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
173	{ /* lexical from outside? */
174	npad[ix] = SvREFCNT_inc (ppad[ix]);
175	}
176	else
177	{ /* our own lexical */
178	SV *sv;
179	if (*name == '&')
180	sv = SvREFCNT_inc (ppad[ix]);
181	else if (*name == '@')
182	sv = (SV *) newAV ();
183	else if (*name == '%')
184	sv = (SV *) newHV ();
185	else
186	sv = NEWSV (0, 0);
187	#ifdef SvPADBUSY
188	if (!SvPADBUSY (sv))
189	#endif
190	SvPADMY_on (sv);
191	npad[ix] = sv;
192	}
193	}
194	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
195	{
196	npad[ix] = SvREFCNT_inc (ppad[ix]);
197	}
198	else
199	{
200	SV *sv = NEWSV (0, 0);
201	SvPADTMP_on (sv);
202	npad[ix] = sv;
203	}
204	}
205
206	#if 0 /* return -ENOTUNDERSTOOD */
207	/* Now that vars are all in place, clone nested closures. */
208
209	for (ix = fpad; ix > 0; ix--) {
210	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
211	if (namesv
212	&& namesv != &PL_sv_undef
213	&& !(SvFLAGS(namesv) & SVf_FAKE)
214	&& *SvPVX(namesv) == '&'
215	&& CvCLONE(ppad[ix]))
216	{
217	CV *kid = cv_clone((CV*)ppad[ix]);
218	SvREFCNT_dec(ppad[ix]);
219	CvCLONE_on(kid);
220	SvPADMY_on(kid);
221	npad[ix] = (SV*)kid;
222	}
223	}
224	#endif
225		172
226	return newpadlist;	173	return newpadlist;
227	}	174	}
228		175
229	STATIC void	176	static void
230	free_padlist (AV *padlist)	177	free_padlist (AV *padlist)
231	{	178	{
232	/* may be during global destruction */	179	/* may be during global destruction */
233	if (SvREFCNT (padlist))	180	if (SvREFCNT (padlist))
234	{	181	{
…		…
248		195
249	SvREFCNT_dec ((SV*)padlist);	196	SvREFCNT_dec ((SV*)padlist);
250	}	197	}
251	}	198	}
252		199
253	STATIC int	200	static int
254	coro_cv_free (SV *sv, MAGIC *mg)	201	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
255	{	202	{
256	AV *padlist;	203	AV *padlist;
257	AV *av = (AV *)mg->mg_obj;	204	AV *av = (AV *)mg->mg_obj;
258		205
259	/* casting is fun. */	206	/* casting is fun. */
260	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	207	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
261	free_padlist (padlist);	208	free_padlist (padlist);
		209
		210	SvREFCNT_dec (av);
		211
		212	return 0;
262	}	213	}
263		214
264	#define PERL_MAGIC_coro PERL_MAGIC_ext	215	#define PERL_MAGIC_coro PERL_MAGIC_ext
265		216
266	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	217	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
267		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
268	/* the next two functions merely cache the padlists */	226	/* the next two functions merely cache the padlists */
269	STATIC void	227	static void
270	get_padlist (CV *cv)	228	get_padlist (CV *cv)
271	{	229	{
272	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	230	MAGIC *mg = CORO_MAGIC (cv);
		231	AV *av;
273		232
274	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	233	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
275	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	234	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
276	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
277	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	244	CvPADLIST (cv) = coro_clone_padlist (cv);
		245	#endif
		246	}
278	}	247	}
279		248
280	STATIC void	249	static void
281	put_padlist (CV *cv)	250	put_padlist (CV *cv)
282	{	251	{
283	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	252	MAGIC *mg = CORO_MAGIC (cv);
		253	AV *av;
284		254
285	if (!mg)	255	if (!mg)
286	{	256	{
287	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	257	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
288	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	258	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
289	mg->mg_virtual = &vtbl_coro;	259	mg->mg_virtual = &vtbl_coro;
290	mg->mg_obj = (SV *)newAV ();	260	mg->mg_obj = (SV *)newAV ();
291	}	261	}
292		262
293	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);
294	}	269	}
295		270
296	#define SB do {	271	#define SB do {
297	#define SE } while (0)	272	#define SE } while (0)
298		273
299	#define LOAD(state) load_state(aTHX_ (state));	274	#define LOAD(state) load_state((state));
300	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	275	#define SAVE(state,flags) save_state((state),(flags));
301		276
302	#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
303		278
304	static void	279	static void
305	load_state(pTHX_ Coro__State c)	280	load_state(Coro__State c)
306	{	281	{
307	PL_dowarn = c->dowarn;	282	#define VAR(name,type) PL_ ## name = c->name;
308	PL_in_eval = c->in_eval;	283	# include "state.h"
309		284	#undef VAR
310	PL_curstackinfo = c->curstackinfo;
311	PL_curstack = c->curstack;
312	PL_mainstack = c->mainstack;
313	PL_stack_sp = c->stack_sp;
314	PL_op = c->op;
315	PL_curpad = c->curpad;
316	PL_comppad = c->comppad;
317	PL_stack_base = c->stack_base;
318	PL_stack_max = c->stack_max;
319	PL_tmps_stack = c->tmps_stack;
320	PL_tmps_floor = c->tmps_floor;
321	PL_tmps_ix = c->tmps_ix;
322	PL_tmps_max = c->tmps_max;
323	PL_markstack = c->markstack;
324	PL_markstack_ptr = c->markstack_ptr;
325	PL_markstack_max = c->markstack_max;
326	PL_scopestack = c->scopestack;
327	PL_scopestack_ix = c->scopestack_ix;
328	PL_scopestack_max = c->scopestack_max;
329	PL_savestack = c->savestack;
330	PL_savestack_ix = c->savestack_ix;
331	PL_savestack_max = c->savestack_max;
332	PL_retstack = c->retstack;
333	PL_retstack_ix = c->retstack_ix;
334	PL_retstack_max = c->retstack_max;
335	PL_curcop = c->curcop;
336	PL_top_env = c->top_env;
337		285
338	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	286	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
339	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	287	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
340	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	288	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
341		289
…		…
344	CV *cv;	292	CV *cv;
345		293
346	/* now do the ugly restore mess */	294	/* now do the ugly restore mess */
347	while ((cv = (CV *)POPs))	295	while ((cv = (CV *)POPs))
348	{	296	{
349	AV *padlist = (AV *)POPs;
350
351	if (padlist)
352	{
353	put_padlist (cv); /* mark this padlist as available */	297	put_padlist (cv); /* mark this padlist as available */
354	CvPADLIST(cv) = padlist;	298	CvDEPTH (cv) = PTR2IV (POPs);
355	#ifdef USE_THREADS	299	CvPADLIST (cv) = (AV *)POPs;
356	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
357	#endif
358	}
359
360	++CvDEPTH(cv);
361	}	300	}
362		301
363	PUTBACK;	302	PUTBACK;
364	}	303	}
365	}	304	}
366		305
367	static void	306	static void
368	save_state(pTHX_ Coro__State c, int flags)	307	save_state(Coro__State c, int flags)
369	{	308	{
370	{	309	{
371	dSP;	310	dSP;
372	I32 cxix = cxstack_ix;	311	I32 cxix = cxstack_ix;
373	PERL_CONTEXT *ccstk = cxstack;	312	PERL_CONTEXT *ccstk = cxstack;
…		…
387	PERL_CONTEXT *cx = &ccstk[cxix--];	326	PERL_CONTEXT *cx = &ccstk[cxix--];
388		327
389	if (CxTYPE(cx) == CXt_SUB)	328	if (CxTYPE(cx) == CXt_SUB)
390	{	329	{
391	CV *cv = cx->blk_sub.cv;	330	CV *cv = cx->blk_sub.cv;
		331
392	if (CvDEPTH(cv))	332	if (CvDEPTH (cv))
393	{	333	{
394	#ifdef USE_THREADS
395	/*XPUSHs ((SV *)CvOWNER(cv));*/
396	/*CvOWNER(cv) = 0;*/
397	/*error must unlock this cv etc.. etc...*/
398	#endif
399	EXTEND (SP, CvDEPTH(cv)*2);	334	EXTEND (SP, 3);
400
401	while (--CvDEPTH(cv))
402	{
403	/* this tells the restore code to increment CvDEPTH */
404	PUSHs (Nullsv);
405	PUSHs ((SV *)cv);
406	}
407		335
408	PUSHs ((SV *)CvPADLIST(cv));	336	PUSHs ((SV *)CvPADLIST(cv));
		337	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
409	PUSHs ((SV *)cv);	338	PUSHs ((SV *)cv);
410		339
		340	CvDEPTH (cv) = 0;
411	get_padlist (cv); /* this is a monster */	341	get_padlist (cv);
412	}	342	}
413	}	343	}
414	#ifdef CXt_FORMAT	344	#ifdef CXt_FORMAT
415	else if (CxTYPE(cx) == CXt_FORMAT)	345	else if (CxTYPE(cx) == CXt_FORMAT)
416	{	346	{
…		…
434		364
435	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;
436	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	366	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
437	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	367	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
438		368
439	c->dowarn = PL_dowarn;	369	#define VAR(name,type)c->name = PL_ ## name;
440	c->in_eval = PL_in_eval;	370	# include "state.h"
441		371	#undef VAR
442	c->curstackinfo = PL_curstackinfo;
443	c->curstack = PL_curstack;
444	c->mainstack = PL_mainstack;
445	c->stack_sp = PL_stack_sp;
446	c->op = PL_op;
447	c->curpad = PL_curpad;
448	c->comppad = PL_comppad;
449	c->stack_base = PL_stack_base;
450	c->stack_max = PL_stack_max;
451	c->tmps_stack = PL_tmps_stack;
452	c->tmps_floor = PL_tmps_floor;
453	c->tmps_ix = PL_tmps_ix;
454	c->tmps_max = PL_tmps_max;
455	c->markstack = PL_markstack;
456	c->markstack_ptr = PL_markstack_ptr;
457	c->markstack_max = PL_markstack_max;
458	c->scopestack = PL_scopestack;
459	c->scopestack_ix = PL_scopestack_ix;
460	c->scopestack_max = PL_scopestack_max;
461	c->savestack = PL_savestack;
462	c->savestack_ix = PL_savestack_ix;
463	c->savestack_max = PL_savestack_max;
464	c->retstack = PL_retstack;
465	c->retstack_ix = PL_retstack_ix;
466	c->retstack_max = PL_retstack_max;
467	c->curcop = PL_curcop;
468	c->top_env = PL_top_env;
469	}	372	}
470		373
471	/*	374	/*
472	* allocate various perl stacks. This is an exact copy	375	* allocate various perl stacks. This is an exact copy
473	* of perl.c:init_stacks, except that it uses less memory	376	* of perl.c:init_stacks, except that it uses less memory
474	* on the (sometimes correct) assumption that coroutines do	377	* on the (sometimes correct) assumption that coroutines do
475	* not usually need a lot of stackspace.	378	* not usually need a lot of stackspace.
476	*/	379	*/
477	STATIC void	380	static void
478	coro_init_stacks (pTHX)	381	coro_init_stacks ()
479	{	382	{
480	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	383	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
481	PL_curstackinfo->si_type = PERLSI_MAIN;	384	PL_curstackinfo->si_type = PERLSI_MAIN;
482	PL_curstack = PL_curstackinfo->si_stack;	385	PL_curstack = PL_curstackinfo->si_stack;
483	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	386	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
505		408
506	New(54,PL_savestack,96,ANY);	409	New(54,PL_savestack,96,ANY);
507	PL_savestack_ix = 0;	410	PL_savestack_ix = 0;
508	PL_savestack_max = 96;	411	PL_savestack_max = 96;
509		412
		413	#if !PERL_VERSION_ATLEAST (5,9,0)
510	New(54,PL_retstack,8,OP*);	414	New(54,PL_retstack,8,OP*);
511	PL_retstack_ix = 0;	415	PL_retstack_ix = 0;
512	PL_retstack_max = 8;	416	PL_retstack_max = 8;
		417	#endif
513	}	418	}
514		419
515	/*	420	/*
516	* destroy the stacks, the callchain etc...	421	* destroy the stacks, the callchain etc...
517	*/	422	*/
518	STATIC void	423	static void
519	destroy_stacks(pTHX)	424	coro_destroy_stacks ()
520	{	425	{
521	if (!IN_DESTRUCT)	426	if (!IN_DESTRUCT)
522	{	427	{
523	/* is this ugly, I ask? */	428	/* is this ugly, I ask? */
524	LEAVE_SCOPE (0);	429	LEAVE_SCOPE (0);
525		430
526	/* sure it is, but more important: is it correct?? :/ */	431	/* sure it is, but more important: is it correct?? :/ */
527	FREETMPS;	432	FREETMPS;
		433
		434	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
528	}	435	}
529		436
530	while (PL_curstackinfo->si_next)	437	while (PL_curstackinfo->si_next)
531	PL_curstackinfo = PL_curstackinfo->si_next;	438	PL_curstackinfo = PL_curstackinfo->si_next;
532		439
533	while (PL_curstackinfo)	440	while (PL_curstackinfo)
534	{	441	{
535	PERL_SI *p = PL_curstackinfo->si_prev;	442	PERL_SI *p = PL_curstackinfo->si_prev;
536		443
537	{	444	{ /*D*//*remove*/
538	dSP;	445	dSP;
539	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	446	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
540	PUTBACK; /* possibly superfluous */	447	PUTBACK; /* possibly superfluous */
541	}	448	}
542		449
543	if (!IN_DESTRUCT)	450	if (!IN_DESTRUCT)
544	{	451	{
545	dounwind(-1);	452	dounwind (-1);/*D*//*remove*/
546	SvREFCNT_dec(PL_curstackinfo->si_stack);	453	SvREFCNT_dec (PL_curstackinfo->si_stack);
547	}	454	}
548		455
549	Safefree(PL_curstackinfo->si_cxstack);	456	Safefree (PL_curstackinfo->si_cxstack);
550	Safefree(PL_curstackinfo);	457	Safefree (PL_curstackinfo);
551	PL_curstackinfo = p;	458	PL_curstackinfo = p;
552	}	459	}
553		460
554	Safefree(PL_tmps_stack);	461	Safefree (PL_tmps_stack);
555	Safefree(PL_markstack);	462	Safefree (PL_markstack);
556	Safefree(PL_scopestack);	463	Safefree (PL_scopestack);
557	Safefree(PL_savestack);	464	Safefree (PL_savestack);
		465	#if !PERL_VERSION_ATLEAST (5,9,0)
558	Safefree(PL_retstack);	466	Safefree (PL_retstack);
559	}
560
561	static void
562	allocate_stack (Coro__State ctx, int alloc)
563	{
564	coro_stack *stack;
565
566	New (0, stack, 1, coro_stack);
567
568	stack->refcnt = 1;
569	stack->usecnt = 1;
570	stack->gencnt = ctx->gencnt = 0;
571	if (alloc)
572	{
573	#if HAVE_MMAP
574	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
575	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
576	if (stack->sptr == (void *)-1)
577	#endif	467	#endif
578	{
579	/*FIXME*//*D*//* reasonable stack size! */
580	stack->ssize = - (8192 * sizeof (long));
581	New (0, stack->sptr, 8192, long);
582	}
583	}
584	else
585	stack->sptr = 0;
586
587	ctx->stack = stack;
588	}	468	}
589		469
590	static void	470	static void
591	deallocate_stack (Coro__State ctx)	471	setup_coro (struct coro *coro)
592	{
593	coro_stack *stack = ctx->stack;
594
595	ctx->stack = 0;
596
597	if (stack)
598	{
599	if (!--stack->refcnt)
600	{
601	#ifdef HAVE_MMAP
602	if (stack->ssize > 0 && stack->sptr)
603	munmap (stack->sptr, stack->ssize);
604	else
605	#endif
606	Safefree (stack->sptr);
607
608	Safefree (stack);
609	}
610	else if (ctx->gencnt == stack->gencnt)
611	--stack->usecnt;
612	}
613	}
614
615	static void
616	setup_coro (void *arg)
617	{	472	{
618	/*	473	/*
619	* emulate part of the perl startup here.	474	* emulate part of the perl startup here.
620	*/	475	*/
621	dSP;
622	Coro__State ctx = (Coro__State)arg;
623	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
624		476
625	coro_init_stacks (aTHX);	477	coro_init_stacks ();
		478
626	/*PL_curcop = 0;*/	479	PL_curcop = 0;
627	/*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
628	SvREFCNT_dec (GvAV (PL_defgv));	490	SvREFCNT_dec (GvAV (PL_defgv));
629	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	491	GvAV (PL_defgv) = coro->args; coro->args = 0;
630		492
631	SPAGAIN;
632
633	if (ctx->stack)
634	{
635	ctx->cursp = 0;
636
637	PUSHMARK(SP);
638	PUTBACK;
639	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
640
641	if (SvTRUE (ERRSV))
642	croak (NULL);
643	else
644	croak ("FATAL: CCTXT coroutine returned!");
645	}
646	else
647	{
648	UNOP myop;
649
650	PL_op = (OP *)&myop;
651
652	Zero(&myop, 1, UNOP);	493	Zero (&myop, 1, LOGOP);
653	myop.op_next = Nullop;	494	myop.op_next = Nullop;
654	myop.op_flags = OPf_WANT_VOID;	495	myop.op_flags = OPf_WANT_VOID;
655		496
		497	PL_op = (OP *)&myop;
		498
656	PUSHMARK(SP);	499	PUSHMARK (SP);
657	XPUSHs (sub_init);	500	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
658	/*
659	* the next line is slightly wrong, as PL_op->op_next
660	* is actually being executed so we skip the first op.
661	* that doesn't matter, though, since it is only
662	* pp_nextstate and we never return...
663	* ah yes, and I don't care anyways ;)
664	*/
665	PUTBACK;	501	PUTBACK;
666	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	502	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
667	SPAGAIN;	503	SPAGAIN;
668		504
669	ENTER; /* necessary e.g. for dounwind */	505	ENTER; /* necessary e.g. for dounwind */
670	}	506	}
671	}	507	}
672		508
673	static void	509	static void
674	continue_coro (void *arg)	510	free_coro_mortal ()
675	{	511	{
676	/*
677	* this is a _very_ stripped down perl interpreter ;)
678	*/
679	Coro__State ctx = (Coro__State)arg;
680	JMPENV coro_start_env;
681
682	PL_top_env = &ctx->start_env;
683
684	ctx->cursp = 0;
685	PL_op = PL_op->op_next;
686	CALLRUNOPS(aTHX);
687
688	abort ();
689	}
690
691	STATIC void
692	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
693	{
694	dSTACKLEVEL;
695	static struct coro *xnext;
696
697	if (prev != next)
698	{
699	xnext = next;
700
701	if (next->mainstack)
702	{
703	SAVE (prev, flags);
704	LOAD (next);
705
706	/* mark this state as in-use */
707	next->mainstack = 0;
708	next->tmps_ix = -2;
709
710	/* stacklevel changed? if yes, grab the stack for us! */
711	if (flags & TRANSFER_SAVE_CCTXT)
712	{
713	if (!prev->stack)
714	allocate_stack (prev, 0);
715	else if (prev->cursp != stacklevel
716	&& prev->stack->usecnt > 1)
717	{
718	prev->gencnt = ++prev->stack->gencnt;
719	prev->stack->usecnt = 1;
720	}
721
722	/* has our stack been invalidated? */
723	if (next->stack && next->stack->gencnt != next->gencnt)
724	{
725	deallocate_stack (next);
726	allocate_stack (next, 1);
727	coro_create (&(next->stack->cctx),
728	continue_coro, (void *)next,
729	next->stack->sptr, labs (next->stack->ssize));
730	}
731
732	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733	/* don't add any code here */
734	}
735
736	}
737	else if (next->tmps_ix == -2)
738	croak ("tried to transfer to running coroutine");
739	else
740	{
741	SAVE (prev, -1); /* first get rid of the old state */
742
743	if (flags & TRANSFER_SAVE_CCTXT)
744	{
745	if (!prev->stack)
746	allocate_stack (prev, 0);
747
748	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
749	{
750	PL_top_env = &next->start_env;
751
752	setup_coro (next);
753
754	prev->stack->refcnt++;
755	prev->stack->usecnt++;
756	next->stack = prev->stack;
757	next->gencnt = prev->gencnt;
758	}
759	else
760	{
761	assert (!next->stack);
762	allocate_stack (next, 1);
763	coro_create (&(next->stack->cctx),
764	setup_coro, (void *)next,
765	next->stack->sptr, labs (next->stack->ssize));
766	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
767	/* don't add any code here */
768	}
769	}
770	else
771	setup_coro (next);
772	}
773
774	/*
775	* xnext is now either prev or next, depending on wether
776	* we switched the c stack or not. that's why I use a global
777	* variable, that should become thread-specific at one point.
778	*/
779	xnext->cursp = stacklevel;
780	}
781
782	if (coro_mortal)	512	if (coro_mortal)
783	{	513	{
784	SvREFCNT_dec (coro_mortal);	514	SvREFCNT_dec (coro_mortal);
785	coro_mortal = 0;	515	coro_mortal = 0;
786	}	516	}
787	}	517	}
788		518
789	#define SV_CORO(sv,func) \	519	static void NOINLINE
790	do { \	520	prepare_cctx (coro_cctx *cctx)
791	if (SvROK (sv)) \	521	{
792	sv = SvRV (sv); \	522	dSP;
793	\	523	LOGOP myop;
794	if (SvTYPE(sv) == SVt_PVHV) \
795	{ \
796	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
797	\
798	if (!he) \
799	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
800	\
801	(sv) = SvRV (HeVAL(he)); \
802	} \
803	\
804	/* must also be changed inside Coro::Cont::yield */ \
805	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
806	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
807	\
808	} while(0)
809		524
810	#define SvSTATE(sv) (struct coro *)SvIV (sv)	525	Zero (&myop, 1, LOGOP);
		526	myop.op_next = PL_op;
		527	myop.op_flags = OPf_WANT_VOID;
811		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() */
		542	UNLOCK;
		543
		544	/*
		545	* this is a _very_ stripped down perl interpreter ;)
		546	*/
		547	PL_top_env = &PL_start_env;
		548
		549	/* inject call to cctx_init */
		550	prepare_cctx ((coro_cctx *)arg);
		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	assert (PL_top_env == prev__cctx->top_env);//D
		700	cctx_put (prev__cctx);
		701	prev->cctx = 0;
		702	}
		703
		704	if (!next->cctx)
		705	next->cctx = cctx_get ();
		706
		707	if (prev__cctx != next->cctx)
		708	{
		709	prev__cctx->top_env = PL_top_env;
		710	PL_top_env = next->cctx->top_env;
		711	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		712	}
		713
		714	free_coro_mortal ();
		715
		716	UNLOCK;
		717	}
		718	}
		719
		720	struct transfer_args
		721	{
		722	struct coro *prev, *next;
		723	int flags;
		724	};
		725
		726	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		727
		728	static void
		729	coro_state_destroy (struct coro *coro)
		730	{
		731	if (coro->refcnt--)
		732	return;
		733
		734	if (coro->mainstack && coro->mainstack != main_mainstack)
		735	{
		736	struct coro temp;
		737
		738	SAVE ((&temp), TRANSFER_SAVE_ALL);
		739	LOAD (coro);
		740
		741	coro_destroy_stacks ();
		742
		743	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		744
		745	coro->mainstack = 0;
		746	}
		747
		748	cctx_free (coro->cctx);
		749	SvREFCNT_dec (coro->args);
		750	Safefree (coro);
		751	}
		752
812	static void	753	static int
		754	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		755	{
		756	struct coro *coro = (struct coro *)mg->mg_ptr;
		757	mg->mg_ptr = 0;
		758
		759	coro_state_destroy (coro);
		760
		761	return 0;
		762	}
		763
		764	static int
		765	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		766	{
		767	struct coro *coro = (struct coro *)mg->mg_ptr;
		768
		769	++coro->refcnt;
		770
		771	return 0;
		772	}
		773
		774	static MGVTBL coro_state_vtbl = {
		775	0, 0, 0, 0,
		776	coro_state_clear,
		777	0,
		778	#ifdef MGf_DUP
		779	coro_state_dup,
		780	#else
		781	# define MGf_DUP 0
		782	#endif
		783	};
		784
		785	static struct coro *
		786	SvSTATE (SV *coro)
		787	{
		788	HV *stash;
		789	MAGIC *mg;
		790
		791	if (SvROK (coro))
		792	coro = SvRV (coro);
		793
		794	stash = SvSTASH (coro);
		795	if (stash != coro_stash && stash != coro_state_stash)
		796	{
		797	/* very slow, but rare, check */
		798	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		799	croak ("Coro::State object required");
		800	}
		801
		802	mg = SvMAGIC (coro);
		803	assert (mg->mg_type == PERL_MAGIC_ext);
		804	return (struct coro *)mg->mg_ptr;
		805	}
		806
		807	static void
		808	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		809	{
		810	ta->prev = SvSTATE (prev);
		811	ta->next = SvSTATE (next);
		812	ta->flags = flags;
		813	}
		814
		815	static void
813	api_transfer(pTHX_ SV *prev, SV *next, int flags)	816	api_transfer (SV *prev, SV *next, int flags)
814	{	817	{
815	SV_CORO (prev, "Coro::transfer");	818	dTHX;
816	SV_CORO (next, "Coro::transfer");	819	struct transfer_args ta;
817		820
818	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	821	prepare_transfer (&ta, prev, next, flags);
		822	TRANSFER (ta);
819	}	823	}
820		824
821	/** Coro ********************************************************************/	825	/** Coro ********************************************************************/
822		826
823	#define PRIO_MAX 3	827	#define PRIO_MAX 3
…		…
827	#define PRIO_IDLE -3	831	#define PRIO_IDLE -3
828	#define PRIO_MIN -4	832	#define PRIO_MIN -4
829		833
830	/* for Coro.pm */	834	/* for Coro.pm */
831	static GV *coro_current, *coro_idle;	835	static GV *coro_current, *coro_idle;
832	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	836	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
833	static int coro_nready;	837	static int coro_nready;
834		838
835	static void	839	static void
836	coro_enq (SV *sv)	840	coro_enq (SV *sv)
837	{	841	{
		842	int prio;
		843
838	if (SvTYPE (sv) == SVt_PVHV)	844	if (SvTYPE (sv) != SVt_PVHV)
839	{
840	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
841	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
842
843	prio = prio > PRIO_MAX ? PRIO_MAX
844	: prio < PRIO_MIN ? PRIO_MIN
845	: prio;
846
847	av_push (coro_ready [prio - PRIO_MIN], sv);
848	coro_nready++;
849
850	return;
851	}
852
853	croak ("Coro::ready tried to enqueue something that is not a coroutine");	845	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		846
		847	prio = SvSTATE (sv)->prio;
		848
		849	av_push (coro_ready [prio - PRIO_MIN], sv);
		850	coro_nready++;
854	}	851	}
855		852
856	static SV *	853	static SV *
857	coro_deq (int min_prio)	854	coro_deq (int min_prio)
858	{	855	{
…		…
861	min_prio -= PRIO_MIN;	858	min_prio -= PRIO_MIN;
862	if (min_prio < 0)	859	if (min_prio < 0)
863	min_prio = 0;	860	min_prio = 0;
864		861
865	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	862	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
866	if (av_len (coro_ready[prio]) >= 0)	863	if (AvFILLp (coro_ready [prio]) >= 0)
867	{	864	{
868	coro_nready--;	865	coro_nready--;
869	return av_shift (coro_ready[prio]);	866	return av_shift (coro_ready [prio]);
870	}	867	}
871		868
872	return 0;	869	return 0;
873	}	870	}
874		871
875	static void	872	static void
876	api_ready (SV *coro)	873	api_ready (SV *coro)
877	{	874	{
		875	dTHX;
		876
878	if (SvROK (coro))	877	if (SvROK (coro))
879	coro = SvRV (coro);	878	coro = SvRV (coro);
880		879
		880	LOCK;
881	coro_enq (SvREFCNT_inc (coro));	881	coro_enq (SvREFCNT_inc (coro));
		882	UNLOCK;
		883	}
		884
		885	static void
		886	prepare_schedule (struct transfer_args *ta)
		887	{
		888	SV *current, *prev, *next;
		889
		890	current = GvSV (coro_current);
		891
		892	for (;;)
		893	{
		894	LOCK;
		895	next = coro_deq (PRIO_MIN);
		896	UNLOCK;
		897
		898	if (next)
		899	break;
		900
		901	{
		902	dSP;
		903
		904	ENTER;
		905	SAVETMPS;
		906
		907	PUSHMARK (SP);
		908	PUTBACK;
		909	call_sv (GvSV (coro_idle), G_DISCARD);
		910
		911	FREETMPS;
		912	LEAVE;
		913	}
		914	}
		915
		916	prev = SvRV (current);
		917	SvRV (current) = next;
		918
		919	/* free this only after the transfer */
		920	LOCK;
		921	free_coro_mortal ();
		922	UNLOCK;
		923	coro_mortal = prev;
		924
		925	ta->prev = SvSTATE (prev);
		926	ta->next = SvSTATE (next);
		927	ta->flags = TRANSFER_SAVE_ALL;
		928	}
		929
		930	static void
		931	prepare_cede (struct transfer_args *ta)
		932	{
		933	LOCK;
		934	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		935	UNLOCK;
		936
		937	prepare_schedule (ta);
882	}	938	}
883		939
884	static void	940	static void
885	api_schedule (void)	941	api_schedule (void)
886	{	942	{
887	SV *prev, *next;	943	dTHX;
		944	struct transfer_args ta;
888		945
889	prev = SvRV (GvSV (coro_current));	946	prepare_schedule (&ta);
890	next = coro_deq (PRIO_MIN);	947	TRANSFER (ta);
891
892	if (!next)
893	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
894
895	/* free this only after the transfer */
896	coro_mortal = prev;
897	SV_CORO (prev, "Coro::schedule");
898
899	SvRV (GvSV (coro_current)) = next;
900
901	SV_CORO (next, "Coro::schedule");
902
903	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
904	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
905	}	948	}
906		949
907	static void	950	static void
908	api_cede (void)	951	api_cede (void)
909	{	952	{
910	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	953	dTHX;
		954	struct transfer_args ta;
911		955
912	api_schedule ();	956	prepare_cede (&ta);
		957	TRANSFER (ta);
913	}	958	}
914		959
915	MODULE = Coro::State PACKAGE = Coro::State	960	MODULE = Coro::State PACKAGE = Coro::State
916		961
917	PROTOTYPES: ENABLE	962	PROTOTYPES: DISABLE
918		963
919	BOOT:	964	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	965	{
921	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	966	#ifdef USE_ITHREADS
922	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	967	MUTEX_INIT (&coro_mutex);
		968	#endif
		969	BOOT_PAGESIZE;
		970
923	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	971	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
924		972
925	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	973	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
926	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	974	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
927	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	975	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
928	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
929
930	if (!padlist_cache)
931	padlist_cache = newHV ();
932		976
933	main_mainstack = PL_mainstack;	977	main_mainstack = PL_mainstack;
934		978
935	coroapi.ver = CORO_API_VERSION;	979	coroapi.ver = CORO_API_VERSION;
936	coroapi.transfer = api_transfer;	980	coroapi.transfer = api_transfer;
937	}
938		981
939	Coro::State	982	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
940	_newprocess(args)	983	}
941	SV * args	984
942	PROTOTYPE: $	985	SV *
		986	new (char *klass, ...)
943	CODE:	987	CODE:
944	Coro__State coro;	988	{
		989	struct coro *coro;
		990	HV *hv;
		991	int i;
945		992
946	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
947	croak ("Coro::State::_newprocess expects an arrayref");
948
949	Newz (0, coro, 1, struct coro);	993	Newz (0, coro, 1, struct coro);
		994	coro->args = newAV ();
950		995
951	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	996	hv = newHV ();
952	coro->mainstack = 0; /* actual work is done inside transfer */	997	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
953	coro->stack = 0;	998	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
954		999
955	/* same as JMPENV_BOOTSTRAP */	1000	for (i = 1; i < items; i++)
956	/* we might be able to recycle start_env, but safe is safe */	1001	av_push (coro->args, newSVsv (ST (i)));
957	//Zero(&coro->start_env, 1, JMPENV);	1002	}
958	coro->start_env.je_ret = -1;
959	coro->start_env.je_mustcatch = TRUE;
960
961	RETVAL = coro;
962	OUTPUT:	1003	OUTPUT:
963	RETVAL	1004	RETVAL
964		1005
965	void	1006	void
966	transfer(prev, next, flags)	1007	_set_stacklevel (...)
967	SV *prev	1008	ALIAS:
968	SV *next	1009	Coro::State::transfer = 1
969	int flags	1010	Coro::schedule = 2
970	PROTOTYPE: @	1011	Coro::cede = 3
		1012	Coro::Cont::yield = 4
971	CODE:	1013	CODE:
972	PUTBACK;	1014	{
973	SV_CORO (next, "Coro::transfer");	1015	struct transfer_args ta;
974	SV_CORO (prev, "Coro::transfer");	1016
975	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1017	switch (ix)
976	SPAGAIN;	1018	{
		1019	case 0:
		1020	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1021	ta.next = 0;
		1022	ta.flags = TRANSFER_SET_STACKLEVEL;
		1023	break;
		1024
		1025	case 1:
		1026	if (items != 3)
		1027	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1028
		1029	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1030	break;
		1031
		1032	case 2:
		1033	prepare_schedule (&ta);
		1034	break;
		1035
		1036	case 3:
		1037	prepare_cede (&ta);
		1038	break;
		1039
		1040	case 4:
		1041	{
		1042	SV *yieldstack;
		1043	SV *sv;
		1044	AV *defav = GvAV (PL_defgv);
		1045
		1046	yieldstack = *hv_fetch (
		1047	(HV *)SvRV (GvSV (coro_current)),
		1048	"yieldstack", sizeof ("yieldstack") - 1,
		1049	0
		1050	);
		1051
		1052	/* set up @_ -- ugly */
		1053	av_clear (defav);
		1054	av_fill (defav, items - 1);
		1055	while (items--)
		1056	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1057
		1058	sv = av_pop ((AV *)SvRV (yieldstack));
		1059	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1060	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1061	ta.flags = 0;
		1062	SvREFCNT_dec (sv);
		1063	}
		1064	break;
		1065
		1066	}
		1067
		1068	TRANSFER (ta);
		1069	}
977		1070
978	void	1071	void
979	DESTROY(coro)	1072	_clone_state_from (SV *dst, SV *src)
980	Coro::State coro	1073	CODE:
981	CODE:	1074	{
		1075	struct coro *coro_src = SvSTATE (src);
982		1076
983	if (coro->mainstack && coro->mainstack != main_mainstack)	1077	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
984	{
985	struct coro temp;
986		1078
987	PUTBACK;	1079	++coro_src->refcnt;
988	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1080	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
989	LOAD(aTHX_ coro);	1081	}
990	SPAGAIN;
991
992	destroy_stacks (aTHX);
993
994	LOAD((&temp)); /* this will get rid of defsv etc.. */
995	SPAGAIN;
996
997	coro->mainstack = 0;
998	}
999
1000	deallocate_stack (coro);
1001	SvREFCNT_dec (coro->args);
1002	Safefree (coro);
1003		1082
1004	void	1083	void
1005	_exit(code)	1084	_exit (code)
1006	int code	1085	int code
1007	PROTOTYPE: $	1086	PROTOTYPE: $
1008	CODE:	1087	CODE:
1009	_exit (code);	1088	_exit (code);
1010		1089
1011	MODULE = Coro::State PACKAGE = Coro::Cont	1090	int
		1091	cctx_count ()
		1092	CODE:
		1093	RETVAL = cctx_count;
		1094	OUTPUT:
		1095	RETVAL
1012		1096
1013	# this is slightly dirty (should expose a c-level api)	1097	int
1014		1098	cctx_idle ()
1015	void	1099	CODE:
1016	yield(...)	1100	RETVAL = cctx_idle;
1017	PROTOTYPE: @	1101	OUTPUT:
1018	CODE:	1102	RETVAL
1019	static SV *returnstk;
1020	SV *sv;
1021	AV *defav = GvAV (PL_defgv);
1022	struct coro *prev, *next;
1023
1024	if (!returnstk)
1025	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1026
1027	/* set up @_ -- ugly */
1028	av_clear (defav);
1029	av_fill (defav, items - 1);
1030	while (items--)
1031	av_store (defav, items, SvREFCNT_inc (ST(items)));
1032
1033	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1034	sv = av_pop ((AV *)SvRV (returnstk));
1035	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1036	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1037	SvREFCNT_dec (sv);
1038
1039	transfer(aTHX_ prev, next, 0);
1040		1103
1041	MODULE = Coro::State PACKAGE = Coro	1104	MODULE = Coro::State PACKAGE = Coro
1042		1105
1043	# this is slightly dirty (should expose a c-level api)
1044
1045	BOOT:	1106	BOOT:
1046	{	1107	{
1047	int i;	1108	int i;
		1109
1048	HV *stash = gv_stashpv ("Coro", TRUE);	1110	coro_stash = gv_stashpv ("Coro", TRUE);
1049		1111
1050	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1112	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1051	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1113	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1052	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1114	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1053	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1115	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1054	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1116	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1055	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1117	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1056		1118
1057	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1119	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1058	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1120	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1059		1121
1060	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1122	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1068	coroapi.ready = api_ready;	1130	coroapi.ready = api_ready;
1069	coroapi.nready = &coro_nready;	1131	coroapi.nready = &coro_nready;
1070	coroapi.current = coro_current;	1132	coroapi.current = coro_current;
1071		1133
1072	GCoroAPI = &coroapi;	1134	GCoroAPI = &coroapi;
1073	sv_setiv(sv, (IV)&coroapi);	1135	sv_setiv (sv, (IV)&coroapi);
1074	SvREADONLY_on(sv);	1136	SvREADONLY_on (sv);
1075	}	1137	}
1076	}	1138	}
1077		1139
1078	#if !PERL_MICRO	1140	int
		1141	prio (Coro::State coro, int newprio = 0)
		1142	ALIAS:
		1143	nice = 1
		1144	CODE:
		1145	{
		1146	RETVAL = coro->prio;
		1147
		1148	if (items > 1)
		1149	{
		1150	if (ix)
		1151	newprio += coro->prio;
		1152
		1153	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1154	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1155
		1156	coro->prio = newprio;
		1157	}
		1158	}
1079		1159
1080	void	1160	void
1081	ready(self)	1161	ready (SV *self)
1082	SV * self
1083	PROTOTYPE: $	1162	PROTOTYPE: $
1084	CODE:	1163	CODE:
1085	api_ready (self);	1164	api_ready (self);
1086		1165
1087	#endif
1088
1089	int	1166	int
1090	nready(...)	1167	nready (...)
1091	PROTOTYPE:	1168	PROTOTYPE:
1092	CODE:	1169	CODE:
1093	RETVAL = coro_nready;	1170	RETVAL = coro_nready;
1094	OUTPUT:	1171	OUTPUT:
1095	RETVAL	1172	RETVAL
1096		1173
		1174	MODULE = Coro::State PACKAGE = Coro::AIO
		1175
		1176	SV *
		1177	_get_state ()
		1178	CODE:
		1179	{
		1180	struct {
		1181	int errorno;
		1182	int laststype;
		1183	int laststatval;
		1184	Stat_t statcache;
		1185	} data;
		1186
		1187	data.errorno = errno;
		1188	data.laststype = PL_laststype;
		1189	data.laststatval = PL_laststatval;
		1190	data.statcache = PL_statcache;
		1191
		1192	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1193	}
		1194	OUTPUT:
		1195	RETVAL
		1196
1097	void	1197	void
1098	schedule(...)	1198	_set_state (char *data_)
1099	PROTOTYPE:	1199	PROTOTYPE: $
1100	CODE:	1200	CODE:
1101	api_schedule ();	1201	{
		1202	struct {
		1203	int errorno;
		1204	int laststype;
		1205	int laststatval;
		1206	Stat_t statcache;
		1207	} *data = (void *)data_;
1102		1208
1103	void	1209	errno = data->errorno;
1104	cede(...)	1210	PL_laststype = data->laststype;
1105	PROTOTYPE:	1211	PL_laststatval = data->laststatval;
1106	CODE:	1212	PL_statcache = data->statcache;
1107	api_cede ();	1213	}
1108

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