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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.61 by root, Tue Aug 10 01:56:30 2004 UTC vs.
Revision 1.111 by root, Thu Nov 30 18:21:14 2006 UTC

1	#define PERL_NO_GET_CONTEXT	1	#include "libcoro/coro.c"
2		2
3	#include "EXTERN.h"	3	#include "EXTERN.h"
4	#include "perl.h"	4	#include "perl.h"
5	#include "XSUB.h"	5	#include "XSUB.h"
6		6
7	#include "patchlevel.h"	7	#include "patchlevel.h"
8		8
9	#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)
10	# ifndef PL_ppaddr	20	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	21	# define PL_ppaddr ppaddr
12	# endif	22	# endif
13	# ifndef call_sv	23	# ifndef call_sv
14	# define call_sv perl_call_sv	24	# define call_sv perl_call_sv
…		…
25	# ifndef IS_PADCONST	35	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	36	# define IS_PADCONST(v) 0
27	# endif	37	# endif
28	#endif	38	#endif
29		39
30	#include "libcoro/coro.c"
31
32	#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
33		50
34	#ifdef HAVE_MMAP	51	#ifdef HAVE_MMAP
35	# include <unistd.h>	52	# include <unistd.h>
36	# include <sys/mman.h>	53	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
…		…
39	# define MAP_ANONYMOUS MAP_ANON	56	# define MAP_ANONYMOUS MAP_ANON
40	# else	57	# else
41	# undef HAVE_MMAP	58	# undef HAVE_MMAP
42	# endif	59	# endif
43	# 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
44	#endif	68	# endif
45		69	#else
46	#define SUB_INIT "Coro::State::initialize"	70	# define PAGESIZE 0
47	#define UCORO_STATE "_coro_state"	71	# define BOOT_PAGESIZE (void)0
		72	#endif
48		73
49	/* The next macro should declare a variable stacklevel that contains and approximation	74	/* The next macro should declare a variable stacklevel that contains and approximation
50	* to the current C stack pointer. Its property is that it changes with each call	75	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
53		79
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		81
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	82	#if __GNUC__ >= 3
		83	# define attribute(x) __attribute__(x)
		84	#else
		85	# define attribute(x)
		86	#endif
		87
		88	#define NOINLINE attribute ((noinline))
57		89
58	#include "CoroAPI.h"	90	#include "CoroAPI.h"
		91
		92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59		93
60	#ifdef USE_ITHREADS	94	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	95	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	98	#else
65	# define LOCK 0	99	# define LOCK (void)0
66	# define UNLOCK 0	100	# define UNLOCK (void)0
67	#endif	101	#endif
68		102
69	static struct CoroAPI coroapi;	103	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	104	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	105	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV *coro_mortal; /* will be freed after next transfer */	106	static SV *coro_mortal; /* will be freed after next transfer */
75		107
76	/* 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 */
77	typedef struct {	112	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	113	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		114
82	coro_context cctx;	115	/* the stack */
83
84	void *sptr;	116	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	117	long ssize; /* positive == mmap, otherwise malloc */
86	} coro_stack;
87		118
		119	/* cpu state */
		120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		121	JMPENV *top_env;
		122	coro_context cctx;
		123
		124	int inuse;
		125
		126	#if USE_VALGRIND
		127	int valgrind_id;
		128	#endif
		129	} coro_cctx;
		130
		131	enum {
		132	CF_RUNNING, /* coroutine is running */
		133	CF_READY, /* coroutine is ready */
		134	};
		135
		136	/* this is a structure representing a perl-level coroutine */
88	struct coro {	137	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	138	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	139	coro_cctx *cctx;
91		140
92	/* the optional C context */	141	/* data associated with this coroutine (initial args) */
93	coro_stack *stack;	142	AV *args;
94	void *cursp;
95	int gencnt;	143	int refcnt;
		144	int flags;
96		145
97	/* optionally saved, might be zero */	146	/* optionally saved, might be zero */
98	AV *defav;	147	AV *defav;
99	SV *defsv;	148	SV *defsv;
100	SV *errsv;	149	SV *errsv;
101		150
102	/* saved global state not related to stacks */	151	#define VAR(name,type) type name;
103	U8 dowarn;	152	# include "state.h"
104	I32 in_eval;	153	#undef VAR
105		154
106	/* the stacks and related info (callchain etc..) */	155	/* coro process data */
107	PERL_SI *curstackinfo;	156	int prio;
108	AV *curstack;
109	AV *mainstack;
110	SV **stack_sp;
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	SV **stack_base;
115	SV **stack_max;
116	SV **tmps_stack;
117	I32 tmps_floor;
118	I32 tmps_ix;
119	I32 tmps_max;
120	I32 *markstack;
121	I32 *markstack_ptr;
122	I32 *markstack_max;
123	I32 *scopestack;
124	I32 scopestack_ix;
125	I32 scopestack_max;
126	ANY *savestack;
127	I32 savestack_ix;
128	I32 savestack_max;
129	OP **retstack;
130	I32 retstack_ix;
131	I32 retstack_max;
132	COP *curcop;
133	JMPENV *top_env;
134
135	/* data associated with this coroutine (initial args) */
136	AV *args;
137	};	157	};
138		158
139	typedef struct coro *Coro__State;	159	typedef struct coro *Coro__State;
140	typedef struct coro *Coro__State_or_hashref;	160	typedef struct coro *Coro__State_or_hashref;
141		161
142	/* mostly copied from op.c:cv_clone2 */	162	static AV *
143	STATIC AV *	163	coro_clone_padlist (CV *cv)
144	clone_padlist (pTHX_ AV *protopadlist)
145	{	164	{
146	AV *av;	165	AV *padlist = CvPADLIST (cv);
147	I32 ix;
148	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
149	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
150	SV **pname = AvARRAY (protopad_name);
151	SV **ppad = AvARRAY (protopad);
152	I32 fname = AvFILLp (protopad_name);
153	I32 fpad = AvFILLp (protopad);
154	AV *newpadlist, *newpad_name, *newpad;	166	AV *newpadlist, *newpad;
155	SV **npad;
156
157	newpad_name = newAV ();
158	for (ix = fname; ix >= 0; ix--)
159	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161	newpad = newAV ();
162	av_fill (newpad, AvFILLp (protopad));
163	npad = AvARRAY (newpad);
164		167
165	newpadlist = newAV ();	168	newpadlist = newAV ();
166	AvREAL_off (newpadlist);	169	AvREAL_off (newpadlist);
167	av_store (newpadlist, 0, (SV *) newpad_name);	170	#if PERL_VERSION_ATLEAST (5,9,0)
		171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		172	#else
		173	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		174	#endif
		175	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		176	--AvFILLp (padlist);
		177
		178	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
168	av_store (newpadlist, 1, (SV *) newpad);	179	av_store (newpadlist, 1, (SV *)newpad);
169
170	av = newAV (); /* will be @_ */
171	av_extend (av, 0);
172	av_store (newpad, 0, (SV *) av);
173	AvFLAGS (av) = AVf_REIFY;
174
175	for (ix = fpad; ix > 0; ix--)
176	{
177	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
178
179	if (namesv && namesv != &PL_sv_undef)
180	{
181	char *name = SvPVX (namesv); /* XXX */
182
183	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
184	{ /* lexical from outside? */
185	npad[ix] = SvREFCNT_inc (ppad[ix]);
186	}
187	else
188	{ /* our own lexical */
189	SV *sv;
190	if (*name == '&')
191	sv = SvREFCNT_inc (ppad[ix]);
192	else if (*name == '@')
193	sv = (SV *) newAV ();
194	else if (*name == '%')
195	sv = (SV *) newHV ();
196	else
197	sv = NEWSV (0, 0);
198
199	#ifdef SvPADBUSY
200	if (!SvPADBUSY (sv))
201	#endif
202	SvPADMY_on (sv);
203
204	npad[ix] = sv;
205	}
206	}
207	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
208	{
209	npad[ix] = SvREFCNT_inc (ppad[ix]);
210	}
211	else
212	{
213	SV *sv = NEWSV (0, 0);
214	SvPADTMP_on (sv);
215	npad[ix] = sv;
216	}
217	}
218
219	#if 0 /* return -ENOTUNDERSTOOD */
220	/* Now that vars are all in place, clone nested closures. */
221
222	for (ix = fpad; ix > 0; ix--) {
223	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224	if (namesv
225	&& namesv != &PL_sv_undef
226	&& !(SvFLAGS(namesv) & SVf_FAKE)
227	&& *SvPVX(namesv) == '&'
228	&& CvCLONE(ppad[ix]))
229	{
230	CV *kid = cv_clone((CV*)ppad[ix]);
231	SvREFCNT_dec(ppad[ix]);
232	CvCLONE_on(kid);
233	SvPADMY_on(kid);
234	npad[ix] = (SV*)kid;
235	}
236	}
237	#endif
238		180
239	return newpadlist;	181	return newpadlist;
240	}	182	}
241		183
242	STATIC void	184	static void
243	free_padlist (pTHX_ AV *padlist)	185	free_padlist (AV *padlist)
244	{	186	{
245	/* may be during global destruction */	187	/* may be during global destruction */
246	if (SvREFCNT (padlist))	188	if (SvREFCNT (padlist))
247	{	189	{
248	I32 i = AvFILLp (padlist);	190	I32 i = AvFILLp (padlist);
…		…
261		203
262	SvREFCNT_dec ((SV*)padlist);	204	SvREFCNT_dec ((SV*)padlist);
263	}	205	}
264	}	206	}
265		207
266	STATIC int	208	static int
267	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	209	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268	{	210	{
269	AV *padlist;	211	AV *padlist;
270	AV *av = (AV *)mg->mg_obj;	212	AV *av = (AV *)mg->mg_obj;
271		213
272	/* casting is fun. */	214	/* casting is fun. */
273	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274	free_padlist (aTHX_ padlist);	216	free_padlist (padlist);
275		217
276	SvREFCNT_dec (av);	218	SvREFCNT_dec (av);
		219
		220	return 0;
277	}	221	}
278		222
279	#define PERL_MAGIC_coro PERL_MAGIC_ext	223	#define PERL_MAGIC_coro PERL_MAGIC_ext
280		224
281	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
282		226
		227	#define CORO_MAGIC(cv) \
		228	SvMAGIC (cv) \
		229	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		230	? SvMAGIC (cv) \
		231	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		232	: 0
		233
283	/* the next two functions merely cache the padlists */	234	/* the next two functions merely cache the padlists */
284	STATIC void	235	static void
285	get_padlist (pTHX_ CV *cv)	236	get_padlist (CV *cv)
286	{	237	{
287	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	238	MAGIC *mg = CORO_MAGIC (cv);
		239	AV *av;
288		240
289	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
290	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
291	else	243	else
		244	{
		245	#if 0
		246	/* this is probably cleaner, but also slower? */
		247	CV *cp = Perl_cv_clone (cv);
		248	CvPADLIST (cv) = CvPADLIST (cp);
		249	CvPADLIST (cp) = 0;
		250	SvREFCNT_dec (cp);
		251	#else
292	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	252	CvPADLIST (cv) = coro_clone_padlist (cv);
		253	#endif
		254	}
293	}	255	}
294		256
295	STATIC void	257	static void
296	put_padlist (pTHX_ CV *cv)	258	put_padlist (CV *cv)
297	{	259	{
298	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	260	MAGIC *mg = CORO_MAGIC (cv);
		261	AV *av;
299		262
300	if (!mg)	263	if (!mg)
301	{	264	{
302	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	265	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
303	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	266	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
304	mg->mg_virtual = &vtbl_coro;	267	mg->mg_virtual = &vtbl_coro;
305	mg->mg_obj = (SV *)newAV ();	268	mg->mg_obj = (SV *)newAV ();
306	}	269	}
307		270
308	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	271	av = (AV *)mg->mg_obj;
		272
		273	if (AvFILLp (av) >= AvMAX (av))
		274	av_extend (av, AvMAX (av) + 1);
		275
		276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
309	}	277	}
310		278
311	#define SB do {	279	#define SB do {
312	#define SE } while (0)	280	#define SE } while (0)
313		281
314	#define LOAD(state) load_state(aTHX_ (state));	282	#define LOAD(state) load_state((state));
315	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	283	#define SAVE(state,flags) save_state((state),(flags));
316		284
317	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	285	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
318		286
319	static void	287	static void
320	load_state(pTHX_ Coro__State c)	288	load_state(Coro__State c)
321	{	289	{
322	PL_dowarn = c->dowarn;	290	#define VAR(name,type) PL_ ## name = c->name;
323	PL_in_eval = c->in_eval;	291	# include "state.h"
324		292	#undef VAR
325	PL_curstackinfo = c->curstackinfo;
326	PL_curstack = c->curstack;
327	PL_mainstack = c->mainstack;
328	PL_stack_sp = c->stack_sp;
329	PL_op = c->op;
330	PL_curpad = c->curpad;
331	PL_comppad = c->comppad;
332	PL_stack_base = c->stack_base;
333	PL_stack_max = c->stack_max;
334	PL_tmps_stack = c->tmps_stack;
335	PL_tmps_floor = c->tmps_floor;
336	PL_tmps_ix = c->tmps_ix;
337	PL_tmps_max = c->tmps_max;
338	PL_markstack = c->markstack;
339	PL_markstack_ptr = c->markstack_ptr;
340	PL_markstack_max = c->markstack_max;
341	PL_scopestack = c->scopestack;
342	PL_scopestack_ix = c->scopestack_ix;
343	PL_scopestack_max = c->scopestack_max;
344	PL_savestack = c->savestack;
345	PL_savestack_ix = c->savestack_ix;
346	PL_savestack_max = c->savestack_max;
347	PL_retstack = c->retstack;
348	PL_retstack_ix = c->retstack_ix;
349	PL_retstack_max = c->retstack_max;
350	PL_curcop = c->curcop;
351	PL_top_env = c->top_env;
352		293
353	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
354	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
355	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
356		297
…		…
359	CV *cv;	300	CV *cv;
360		301
361	/* now do the ugly restore mess */	302	/* now do the ugly restore mess */
362	while ((cv = (CV *)POPs))	303	while ((cv = (CV *)POPs))
363	{	304	{
364	AV *padlist = (AV *)POPs;
365
366	if (padlist)
367	{
368	put_padlist (aTHX_ cv); /* mark this padlist as available */	305	put_padlist (cv); /* mark this padlist as available */
369	CvPADLIST(cv) = padlist;	306	CvDEPTH (cv) = PTR2IV (POPs);
370	}	307	CvPADLIST (cv) = (AV *)POPs;
371
372	++CvDEPTH(cv);
373	}	308	}
374		309
375	PUTBACK;	310	PUTBACK;
376	}	311	}
377	}	312	}
378		313
379	static void	314	static void
380	save_state(pTHX_ Coro__State c, int flags)	315	save_state(Coro__State c, int flags)
381	{	316	{
382	{	317	{
383	dSP;	318	dSP;
384	I32 cxix = cxstack_ix;	319	I32 cxix = cxstack_ix;
385	PERL_CONTEXT *ccstk = cxstack;	320	PERL_CONTEXT *ccstk = cxstack;
…		…
399	PERL_CONTEXT *cx = &ccstk[cxix--];	334	PERL_CONTEXT *cx = &ccstk[cxix--];
400		335
401	if (CxTYPE(cx) == CXt_SUB)	336	if (CxTYPE(cx) == CXt_SUB)
402	{	337	{
403	CV *cv = cx->blk_sub.cv;	338	CV *cv = cx->blk_sub.cv;
		339
404	if (CvDEPTH(cv))	340	if (CvDEPTH (cv))
405	{	341	{
406	EXTEND (SP, CvDEPTH(cv)*2);	342	EXTEND (SP, 3);
407
408	while (--CvDEPTH(cv))
409	{
410	/* this tells the restore code to increment CvDEPTH */
411	PUSHs (Nullsv);
412	PUSHs ((SV *)cv);
413	}
414		343
415	PUSHs ((SV *)CvPADLIST(cv));	344	PUSHs ((SV *)CvPADLIST(cv));
		345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
416	PUSHs ((SV *)cv);	346	PUSHs ((SV *)cv);
417		347
418	get_padlist (aTHX_ cv); /* this is a monster */	348	CvDEPTH (cv) = 0;
		349	get_padlist (cv);
419	}	350	}
420	}	351	}
421	#ifdef CXt_FORMAT	352	#ifdef CXt_FORMAT
422	else if (CxTYPE(cx) == CXt_FORMAT)	353	else if (CxTYPE(cx) == CXt_FORMAT)
423	{	354	{
…		…
441		372
442	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	373	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
443	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
444	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
445		376
446	c->dowarn = PL_dowarn;	377	#define VAR(name,type)c->name = PL_ ## name;
447	c->in_eval = PL_in_eval;	378	# include "state.h"
448		379	#undef VAR
449	c->curstackinfo = PL_curstackinfo;
450	c->curstack = PL_curstack;
451	c->mainstack = PL_mainstack;
452	c->stack_sp = PL_stack_sp;
453	c->op = PL_op;
454	c->curpad = PL_curpad;
455	c->comppad = PL_comppad;
456	c->stack_base = PL_stack_base;
457	c->stack_max = PL_stack_max;
458	c->tmps_stack = PL_tmps_stack;
459	c->tmps_floor = PL_tmps_floor;
460	c->tmps_ix = PL_tmps_ix;
461	c->tmps_max = PL_tmps_max;
462	c->markstack = PL_markstack;
463	c->markstack_ptr = PL_markstack_ptr;
464	c->markstack_max = PL_markstack_max;
465	c->scopestack = PL_scopestack;
466	c->scopestack_ix = PL_scopestack_ix;
467	c->scopestack_max = PL_scopestack_max;
468	c->savestack = PL_savestack;
469	c->savestack_ix = PL_savestack_ix;
470	c->savestack_max = PL_savestack_max;
471	c->retstack = PL_retstack;
472	c->retstack_ix = PL_retstack_ix;
473	c->retstack_max = PL_retstack_max;
474	c->curcop = PL_curcop;
475	c->top_env = PL_top_env;
476	}	380	}
477		381
478	/*	382	/*
479	* allocate various perl stacks. This is an exact copy	383	* allocate various perl stacks. This is an exact copy
480	* of perl.c:init_stacks, except that it uses less memory	384	* of perl.c:init_stacks, except that it uses less memory
481	* on the (sometimes correct) assumption that coroutines do	385	* on the (sometimes correct) assumption that coroutines do
482	* not usually need a lot of stackspace.	386	* not usually need a lot of stackspace.
483	*/	387	*/
484	STATIC void	388	static void
485	coro_init_stacks (pTHX)	389	coro_init_stacks ()
486	{	390	{
487	LOCK;
488
489	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
490	PL_curstackinfo->si_type = PERLSI_MAIN;	392	PL_curstackinfo->si_type = PERLSI_MAIN;
491	PL_curstack = PL_curstackinfo->si_stack;	393	PL_curstack = PL_curstackinfo->si_stack;
492	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
493		395
…		…
514		416
515	New(54,PL_savestack,96,ANY);	417	New(54,PL_savestack,96,ANY);
516	PL_savestack_ix = 0;	418	PL_savestack_ix = 0;
517	PL_savestack_max = 96;	419	PL_savestack_max = 96;
518		420
		421	#if !PERL_VERSION_ATLEAST (5,9,0)
519	New(54,PL_retstack,8,OP*);	422	New(54,PL_retstack,8,OP*);
520	PL_retstack_ix = 0;	423	PL_retstack_ix = 0;
521	PL_retstack_max = 8;	424	PL_retstack_max = 8;
522		425	#endif
523	UNLOCK;
524	}	426	}
525		427
526	/*	428	/*
527	* destroy the stacks, the callchain etc...	429	* destroy the stacks, the callchain etc...
528	*/	430	*/
529	STATIC void	431	static void
530	destroy_stacks(pTHX)	432	coro_destroy_stacks ()
531	{	433	{
532	if (!IN_DESTRUCT)	434	if (!IN_DESTRUCT)
533	{	435	{
534	/* is this ugly, I ask? */	436	/* is this ugly, I ask? */
535	LEAVE_SCOPE (0);	437	LEAVE_SCOPE (0);
…		…
566		468
567	Safefree (PL_tmps_stack);	469	Safefree (PL_tmps_stack);
568	Safefree (PL_markstack);	470	Safefree (PL_markstack);
569	Safefree (PL_scopestack);	471	Safefree (PL_scopestack);
570	Safefree (PL_savestack);	472	Safefree (PL_savestack);
		473	#if !PERL_VERSION_ATLEAST (5,9,0)
571	Safefree (PL_retstack);	474	Safefree (PL_retstack);
572	}
573
574	static void
575	allocate_stack (Coro__State ctx, int alloc)
576	{
577	coro_stack *stack;
578
579	New (0, stack, 1, coro_stack);
580
581	stack->refcnt = 1;
582	stack->usecnt = 1;
583	stack->gencnt = ctx->gencnt = 0;
584
585	if (alloc)
586	{
587	#if HAVE_MMAP
588	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
589	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
590	if (stack->sptr == (void *)-1)
591	#endif	475	#endif
592	{
593	/*FIXME*//*D*//* reasonable stack size! */
594	stack->ssize = - (8192 * sizeof (long));
595	New (0, stack->sptr, 8192, long);
596	}
597	}
598	else
599	stack->sptr = 0;
600
601	ctx->stack = stack;
602	}	476	}
603		477
604	static void	478	static void
605	deallocate_stack (Coro__State ctx)	479	setup_coro (struct coro *coro)
606	{
607	coro_stack *stack = ctx->stack;
608
609	ctx->stack = 0;
610
611	if (stack)
612	{
613	if (!--stack->refcnt)
614	{
615	#ifdef HAVE_MMAP
616	if (stack->ssize > 0 && stack->sptr)
617	munmap (stack->sptr, stack->ssize);
618	else
619	#endif
620	Safefree (stack->sptr);
621
622	Safefree (stack);
623	}
624	else if (ctx->gencnt == stack->gencnt)
625	--stack->usecnt;
626	}
627	}
628
629	static void
630	setup_coro (void *arg)
631	{	480	{
632	/*	481	/*
633	* emulate part of the perl startup here.	482	* emulate part of the perl startup here.
634	*/	483	*/
635	dTHX;
636	dSP;
637	Coro__State ctx = (Coro__State)arg;
638	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
639		484
640	coro_init_stacks (aTHX);	485	coro_init_stacks ();
		486
641	/*PL_curcop = 0;*/	487	PL_curcop = 0;
642	/*PL_in_eval = PL_in_eval;*/ /* inherit */	488	PL_in_eval = 0;
		489	PL_curpm = 0;
		490
		491	{
		492	dSP;
		493	LOGOP myop;
		494
		495	/* I have no idea why this is needed, but it is */
		496	PUSHMARK (SP);
		497
643	SvREFCNT_dec (GvAV (PL_defgv));	498	SvREFCNT_dec (GvAV (PL_defgv));
644	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	499	GvAV (PL_defgv) = coro->args; coro->args = 0;
645		500
646	SPAGAIN;
647
648	if (ctx->stack)
649	{
650	ctx->cursp = 0;
651
652	PUSHMARK(SP);
653	PUTBACK;
654	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
655
656	if (SvTRUE (ERRSV))
657	croak (NULL);
658	else
659	croak ("FATAL: CCTXT coroutine returned!");
660	}
661	else
662	{
663	UNOP myop;
664
665	PL_op = (OP *)&myop;
666
667	Zero(&myop, 1, UNOP);	501	Zero (&myop, 1, LOGOP);
668	myop.op_next = Nullop;	502	myop.op_next = Nullop;
669	myop.op_flags = OPf_WANT_VOID;	503	myop.op_flags = OPf_WANT_VOID;
670		504
		505	PL_op = (OP *)&myop;
		506
671	PUSHMARK(SP);	507	PUSHMARK (SP);
672	XPUSHs (sub_init);	508	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
673	/*
674	* the next line is slightly wrong, as PL_op->op_next
675	* is actually being executed so we skip the first op.
676	* that doesn't matter, though, since it is only
677	* pp_nextstate and we never return...
678	* ah yes, and I don't care anyways ;)
679	*/
680	PUTBACK;	509	PUTBACK;
681	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	510	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
682	SPAGAIN;	511	SPAGAIN;
683		512
684	ENTER; /* necessary e.g. for dounwind */	513	ENTER; /* necessary e.g. for dounwind */
685	}	514	}
686	}	515	}
687		516
688	static void	517	static void
689	continue_coro (void *arg)	518	free_coro_mortal ()
690	{	519	{
691	/*
692	* this is a _very_ stripped down perl interpreter ;)
693	*/
694	dTHX;
695	Coro__State ctx = (Coro__State)arg;
696	JMPENV coro_start_env;
697
698	PL_top_env = &ctx->start_env;
699
700	ctx->cursp = 0;
701	PL_op = PL_op->op_next;
702	CALLRUNOPS(aTHX);
703
704	abort ();
705	}
706
707	STATIC void
708	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
709	{
710	dSTACKLEVEL;
711
712	if (prev != next)
713	{
714	if (next->mainstack)
715	{
716	LOCK;
717	SAVE (prev, flags);
718	LOAD (next);
719	UNLOCK;
720
721	/* mark this state as in-use */
722	next->mainstack = 0;
723	next->tmps_ix = -2;
724
725	/* stacklevel changed? if yes, grab the stack for us! */
726	if (flags & TRANSFER_SAVE_CCTXT)
727	{
728	if (!prev->stack)
729	allocate_stack (prev, 0);
730	else if (prev->cursp != stacklevel
731	&& prev->stack->usecnt > 1)
732	{
733	prev->gencnt = ++prev->stack->gencnt;
734	prev->stack->usecnt = 1;
735	}
736
737	/* has our stack been invalidated? */
738	if (next->stack && next->stack->gencnt != next->gencnt)
739	{
740	deallocate_stack (next);
741	allocate_stack (next, 1);
742	coro_create (&(next->stack->cctx),
743	continue_coro, (void *)next,
744	next->stack->sptr, labs (next->stack->ssize));
745	}
746
747	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
748	prev->cursp = stacklevel;
749	/* don't add any code here */
750	}
751	else
752	next->cursp = stacklevel;
753	}
754	else if (next->tmps_ix == -2)
755	croak ("tried to transfer to running coroutine");
756	else
757	{
758	LOCK;
759	SAVE (prev, -1); /* first get rid of the old state */
760	UNLOCK;
761
762	if (flags & TRANSFER_SAVE_CCTXT)
763	{
764	if (!prev->stack)
765	allocate_stack (prev, 0);
766
767	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
768	{
769	PL_top_env = &next->start_env;
770
771	setup_coro (next);
772	next->cursp = stacklevel;
773
774	prev->stack->refcnt++;
775	prev->stack->usecnt++;
776	next->stack = prev->stack;
777	next->gencnt = prev->gencnt;
778	}
779	else
780	{
781	assert (!next->stack);
782	allocate_stack (next, 1);
783	coro_create (&(next->stack->cctx),
784	setup_coro, (void *)next,
785	next->stack->sptr, labs (next->stack->ssize));
786	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
787	prev->cursp = stacklevel;
788	/* don't add any code here */
789	}
790	}
791	else
792	{
793	setup_coro (next);
794	next->cursp = stacklevel;
795	}
796	}
797	}
798
799	LOCK;
800	if (coro_mortal)	520	if (coro_mortal)
801	{	521	{
802	SvREFCNT_dec (coro_mortal);	522	SvREFCNT_dec (coro_mortal);
803	coro_mortal = 0;	523	coro_mortal = 0;
804	}	524	}
		525	}
		526
		527	static void NOINLINE
		528	prepare_cctx (coro_cctx *cctx)
		529	{
		530	dSP;
		531	LOGOP myop;
		532
		533	Zero (&myop, 1, LOGOP);
		534	myop.op_next = PL_op;
		535	myop.op_flags = OPf_WANT_VOID;
		536
		537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		538
		539	PUSHMARK (SP);
		540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		541	PUTBACK;
		542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		543	SPAGAIN;
		544	}
		545
		546	static void
		547	coro_run (void *arg)
		548	{
		549	/* coro_run is the alternative epilogue of transfer() */
805	UNLOCK;	550	UNLOCK;
806	}
807		551
808	#define SV_CORO(sv,func) \	552	/*
809	do { \	553	* this is a _very_ stripped down perl interpreter ;)
810	if (SvROK (sv)) \	554	*/
811	sv = SvRV (sv); \	555	PL_top_env = &PL_start_env;
812	\
813	if (SvTYPE (sv) == SVt_PVHV) \
814	{ \
815	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
816	\
817	if (!he) \
818	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
819	\
820	(sv) = SvRV (HeVAL(he)); \
821	} \
822	\
823	/* must also be changed inside Coro::Cont::yield */ \
824	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
825	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
826	\
827	} while(0)
828		556
829	#define SvSTATE(sv) (struct coro *)SvIV (sv)	557	/* inject call to cctx_init */
		558	prepare_cctx ((coro_cctx *)arg);
830		559
		560	/* somebody will hit me for both perl_run and PL_restartop */
		561	perl_run (PL_curinterp);
		562
		563	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		564	abort ();
		565	}
		566
		567	static coro_cctx *
		568	cctx_new ()
		569	{
		570	coro_cctx *cctx;
		571
		572	++cctx_count;
		573
		574	New (0, cctx, 1, coro_cctx);
		575
		576	#if HAVE_MMAP
		577
		578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		579	/* mmap suppsedly does allocate-on-write for us */
		580	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		581
		582	if (cctx->sptr == (void *)-1)
		583	{
		584	perror ("FATAL: unable to mmap stack for coroutine");
		585	_exit (EXIT_FAILURE);
		586	}
		587
		588	# if STACKGUARD
		589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		590	# endif
		591
		592	#else
		593
		594	cctx->ssize = STACKSIZE * (long)sizeof (long);
		595	New (0, cctx->sptr, STACKSIZE, long);
		596
		597	if (!cctx->sptr)
		598	{
		599	perror ("FATAL: unable to malloc stack for coroutine");
		600	_exit (EXIT_FAILURE);
		601	}
		602
		603	#endif
		604
		605	#if USE_VALGRIND
		606	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		607	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		608	cctx->ssize + (char *)cctx->sptr
		609	);
		610	#endif
		611
		612	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		613
		614	return cctx;
		615	}
		616
		617	static void
		618	cctx_free (coro_cctx *cctx)
		619	{
		620	if (!cctx)
		621	return;
		622
		623	--cctx_count;
		624
		625	#if USE_VALGRIND
		626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		627	#endif
		628
		629	#if HAVE_MMAP
		630	munmap (cctx->sptr, cctx->ssize);
		631	#else
		632	Safefree (cctx->sptr);
		633	#endif
		634
		635	Safefree (cctx);
		636	}
		637
		638	static coro_cctx *
		639	cctx_get ()
		640	{
		641	coro_cctx *cctx;
		642
		643	if (cctx_first)
		644	{
		645	--cctx_idle;
		646	cctx = cctx_first;
		647	cctx_first = cctx->next;
		648	}
		649	else
		650	{
		651	cctx = cctx_new ();
		652	PL_op = PL_op->op_next;
		653	}
		654
		655	return cctx;
		656	}
		657
		658	static void
		659	cctx_put (coro_cctx *cctx)
		660	{
		661	++cctx_idle;
		662	cctx->next = cctx_first;
		663	cctx_first = cctx;
		664	}
		665
		666	/* never call directly, always through the coro_state_transfer global variable */
		667	static void NOINLINE
		668	transfer (struct coro *prev, struct coro *next, int flags)
		669	{
		670	dSTACKLEVEL;
		671
		672	/* sometimes transfer is only called to set idle_sp */
		673	if (flags == TRANSFER_SET_STACKLEVEL)
		674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		675	else if (prev != next)
		676	{
		677	coro_cctx *prev__cctx;
		678
		679	if (!prev->cctx)
		680	{
		681	/* create a new empty context */
		682	Newz (0, prev->cctx, 1, coro_cctx);
		683	prev->cctx->inuse = 1;
		684	prev->flags |= CF_RUNNING;
		685	}
		686
		687	assert ( prev->flags & CF_RUNNING);
		688	assert (!next->flags & CF_RUNNING);
		689
		690	prev->flags &= ~CF_RUNNING;
		691	next->flags |= CF_RUNNING;
		692
		693	LOCK;
		694
		695	if (next->mainstack)
		696	{
		697	/* coroutine already started */
		698	SAVE (prev, flags);
		699	LOAD (next);
		700	}
		701	else
		702	{
		703	/* need to start coroutine */
		704	/* first get rid of the old state */
		705	SAVE (prev, -1);
		706	/* setup coroutine call */
		707	setup_coro (next);
		708	/* need a stack */
		709	assert (!next->stack);
		710	next->cctx = 0;
		711	}
		712
		713	prev__cctx = prev->cctx;
		714
		715	/* possibly "free" the cctx */
		716	if (prev__cctx->idle_sp == STACKLEVEL)
		717	{
		718	assert (PL_top_env == prev__cctx->top_env);//D
		719	cctx_put (prev__cctx);
		720	prev->cctx = 0;
		721	}
		722
		723	if (!next->cctx)
		724	next->cctx = cctx_get ();
		725
		726	if (prev__cctx != next->cctx)
		727	{
		728	assert ( prev__cctx->inuse);
		729	assert (!next->cctx->inuse);
		730
		731	prev__cctx->inuse = 0;
		732	next->cctx->inuse = 1;
		733
		734	prev__cctx->top_env = PL_top_env;
		735	PL_top_env = next->cctx->top_env;
		736	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		737	}
		738
		739	free_coro_mortal ();
		740
		741	UNLOCK;
		742	}
		743	}
		744
		745	struct transfer_args
		746	{
		747	struct coro *prev, *next;
		748	int flags;
		749	};
		750
		751	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		752
		753	static void
		754	coro_state_destroy (struct coro *coro)
		755	{
		756	if (coro->refcnt--)
		757	return;
		758
		759	if (coro->mainstack && coro->mainstack != main_mainstack)
		760	{
		761	struct coro temp;
		762
		763	SAVE ((&temp), TRANSFER_SAVE_ALL);
		764	LOAD (coro);
		765
		766	coro_destroy_stacks ();
		767
		768	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		769
		770	coro->mainstack = 0;
		771	}
		772
		773	cctx_free (coro->cctx);
		774	SvREFCNT_dec (coro->args);
		775	Safefree (coro);
		776	}
		777
831	static void	778	static int
		779	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		780	{
		781	struct coro *coro = (struct coro *)mg->mg_ptr;
		782	mg->mg_ptr = 0;
		783
		784	coro_state_destroy (coro);
		785
		786	return 0;
		787	}
		788
		789	static int
		790	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		791	{
		792	struct coro *coro = (struct coro *)mg->mg_ptr;
		793
		794	++coro->refcnt;
		795
		796	return 0;
		797	}
		798
		799	static MGVTBL coro_state_vtbl = {
		800	0, 0, 0, 0,
		801	coro_state_clear,
		802	0,
		803	#ifdef MGf_DUP
		804	coro_state_dup,
		805	#else
		806	# define MGf_DUP 0
		807	#endif
		808	};
		809
		810	static struct coro *
		811	SvSTATE (SV *coro)
		812	{
		813	HV *stash;
		814	MAGIC *mg;
		815
		816	if (SvROK (coro))
		817	coro = SvRV (coro);
		818
		819	stash = SvSTASH (coro);
		820	if (stash != coro_stash && stash != coro_state_stash)
		821	{
		822	/* very slow, but rare, check */
		823	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		824	croak ("Coro::State object required");
		825	}
		826
		827	mg = SvMAGIC (coro);
		828	assert (mg->mg_type == PERL_MAGIC_ext);
		829	return (struct coro *)mg->mg_ptr;
		830	}
		831
		832	static void
		833	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		834	{
		835	ta->prev = SvSTATE (prev);
		836	ta->next = SvSTATE (next);
		837	ta->flags = flags;
		838	}
		839
		840	static void
832	api_transfer(pTHX_ SV *prev, SV *next, int flags)	841	api_transfer (SV *prev, SV *next, int flags)
833	{	842	{
834	SV_CORO (prev, "Coro::transfer");	843	dTHX;
835	SV_CORO (next, "Coro::transfer");	844	struct transfer_args ta;
836		845
837	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	846	prepare_transfer (&ta, prev, next, flags);
		847	TRANSFER (ta);
838	}	848	}
839		849
840	/** Coro ********************************************************************/	850	/** Coro ********************************************************************/
841		851
842	#define PRIO_MAX 3	852	#define PRIO_MAX 3
…		…
846	#define PRIO_IDLE -3	856	#define PRIO_IDLE -3
847	#define PRIO_MIN -4	857	#define PRIO_MIN -4
848		858
849	/* for Coro.pm */	859	/* for Coro.pm */
850	static GV *coro_current, *coro_idle;	860	static GV *coro_current, *coro_idle;
851	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	861	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
852	static int coro_nready;	862	static int coro_nready;
853		863
854	static void	864	static void
855	coro_enq (pTHX_ SV *sv)	865	coro_enq (SV *sv)
856	{	866	{
		867	int prio;
		868
857	if (SvTYPE (sv) == SVt_PVHV)	869	if (SvTYPE (sv) != SVt_PVHV)
858	{
859	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
860	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
861
862	prio = prio > PRIO_MAX ? PRIO_MAX
863	: prio < PRIO_MIN ? PRIO_MIN
864	: prio;
865
866	av_push (coro_ready [prio - PRIO_MIN], sv);
867	coro_nready++;
868
869	return;
870	}
871
872	croak ("Coro::ready tried to enqueue something that is not a coroutine");	870	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		871
		872	prio = SvSTATE (sv)->prio;
		873
		874	av_push (coro_ready [prio - PRIO_MIN], sv);
		875	coro_nready++;
873	}	876	}
874		877
875	static SV *	878	static SV *
876	coro_deq (pTHX_ int min_prio)	879	coro_deq (int min_prio)
877	{	880	{
878	int prio = PRIO_MAX - PRIO_MIN;	881	int prio = PRIO_MAX - PRIO_MIN;
879		882
880	min_prio -= PRIO_MIN;	883	min_prio -= PRIO_MIN;
881	if (min_prio < 0)	884	if (min_prio < 0)
882	min_prio = 0;	885	min_prio = 0;
883		886
884	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
885	if (av_len (coro_ready[prio]) >= 0)	888	if (AvFILLp (coro_ready [prio]) >= 0)
886	{	889	{
887	coro_nready--;	890	coro_nready--;
888	return av_shift (coro_ready[prio]);	891	return av_shift (coro_ready [prio]);
889	}	892	}
890		893
891	return 0;	894	return 0;
892	}	895	}
893		896
894	static void	897	static int
895	api_ready (SV *coro)	898	api_ready (SV *coro_sv)
		899	{
		900	struct coro *coro;
		901
		902	if (SvROK (coro_sv))
		903	coro_sv = SvRV (coro_sv);
		904
		905	coro = SvSTATE (coro_sv);
		906	if (coro->flags & CF_READY)
		907	return 0;
		908
		909	coro->flags |= CF_READY;
		910
		911	LOCK;
		912	coro_enq (SvREFCNT_inc (coro_sv));
		913	UNLOCK;
		914
		915	return 1;
		916	}
		917
		918	static int
		919	api_is_ready (SV *coro_sv)
		920	{
		921	struct coro *coro;
		922
		923	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		924	}
		925
		926	static void
		927	prepare_schedule (struct transfer_args *ta)
		928	{
		929	SV *current, *prev, *next;
		930
		931	current = GvSV (coro_current);
		932
		933	for (;;)
		934	{
		935	LOCK;
		936	next = coro_deq (PRIO_MIN);
		937	UNLOCK;
		938
		939	if (next)
		940	break;
		941
		942	{
		943	dSP;
		944
		945	ENTER;
		946	SAVETMPS;
		947
		948	PUSHMARK (SP);
		949	PUTBACK;
		950	call_sv (GvSV (coro_idle), G_DISCARD);
		951
		952	FREETMPS;
		953	LEAVE;
		954	}
		955	}
		956
		957	prev = SvRV (current);
		958	SvRV (current) = next;
		959
		960	/* free this only after the transfer */
		961	LOCK;
		962	free_coro_mortal ();
		963	UNLOCK;
		964	coro_mortal = prev;
		965
		966	ta->prev = SvSTATE (prev);
		967	ta->next = SvSTATE (next);
		968	ta->flags = TRANSFER_SAVE_ALL;
		969
		970	ta->next->flags &= ~CF_READY;
		971	}
		972
		973	static void
		974	prepare_cede (struct transfer_args *ta)
		975	{
		976	api_ready (GvSV (coro_current));
		977
		978	prepare_schedule (ta);
		979	}
		980
		981	static void
		982	api_schedule (void)
896	{	983	{
897	dTHX;	984	dTHX;
		985	struct transfer_args ta;
898		986
899	if (SvROK (coro))	987	prepare_schedule (&ta);
900	coro = SvRV (coro);	988	TRANSFER (ta);
901
902	LOCK;
903	coro_enq (aTHX_ SvREFCNT_inc (coro));
904	UNLOCK;
905	}	989	}
906		990
907	static void	991	static void
908	api_schedule (void)	992	api_cede (void)
909	{	993	{
910	dTHX;	994	dTHX;
		995	struct transfer_args ta;
911		996
912	SV *prev, *next;	997	prepare_cede (&ta);
913		998	TRANSFER (ta);
914	LOCK;
915
916	prev = SvRV (GvSV (coro_current));
917	next = coro_deq (aTHX_ PRIO_MIN);
918
919	if (!next)
920	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
921
922	/* free this only after the transfer */
923	coro_mortal = prev;
924	SV_CORO (prev, "Coro::schedule");
925
926	SvRV (GvSV (coro_current)) = next;
927
928	SV_CORO (next, "Coro::schedule");
929
930	UNLOCK;
931
932	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
933	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
934	}
935
936	static void
937	api_cede (void)
938	{
939	dTHX;
940
941	LOCK;
942	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
943	UNLOCK;
944
945	api_schedule ();
946	}	999	}
947		1000
948	MODULE = Coro::State PACKAGE = Coro::State	1001	MODULE = Coro::State PACKAGE = Coro::State
949		1002
950	PROTOTYPES: ENABLE	1003	PROTOTYPES: DISABLE
951		1004
952	BOOT:	1005	BOOT:
953	{ /* {} necessary for stoopid perl-5.6.x */	1006	{
954	#ifdef USE_ITHREADS	1007	#ifdef USE_ITHREADS
955	MUTEX_INIT (&coro_mutex);	1008	MUTEX_INIT (&coro_mutex);
956	#endif	1009	#endif
		1010	BOOT_PAGESIZE;
957		1011
958	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
959	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
960	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1012	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
961		1013
962	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1014	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
963	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1015	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
964	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1016	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
965	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
966		1017
967	main_mainstack = PL_mainstack;	1018	main_mainstack = PL_mainstack;
968		1019
969	coroapi.ver = CORO_API_VERSION;	1020	coroapi.ver = CORO_API_VERSION;
970	coroapi.transfer = api_transfer;	1021	coroapi.transfer = api_transfer;
971	}
972		1022
973	Coro::State	1023	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
974	_newprocess(args)	1024	}
975	SV * args	1025
976	PROTOTYPE: $	1026	SV *
		1027	new (char *klass, ...)
977	CODE:	1028	CODE:
978	Coro__State coro;	1029	{
		1030	struct coro *coro;
		1031	HV *hv;
		1032	int i;
979		1033
980	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
981	croak ("Coro::State::_newprocess expects an arrayref");
982
983	Newz (0, coro, 1, struct coro);	1034	Newz (0, coro, 1, struct coro);
		1035	coro->args = newAV ();
984		1036
985	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1037	hv = newHV ();
986	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1038	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
987	/*coro->stack = 0;*/	1039	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
988		1040
989	/* same as JMPENV_BOOTSTRAP */	1041	for (i = 1; i < items; i++)
990	/* we might be able to recycle start_env, but safe is safe */	1042	av_push (coro->args, newSVsv (ST (i)));
991	/*Zero(&coro->start_env, 1, JMPENV);*/	1043	}
992	coro->start_env.je_ret = -1;
993	coro->start_env.je_mustcatch = TRUE;
994
995	RETVAL = coro;
996	OUTPUT:	1044	OUTPUT:
997	RETVAL	1045	RETVAL
998		1046
999	void	1047	void
1000	transfer(prev, next, flags)	1048	_set_stacklevel (...)
1001	SV *prev	1049	ALIAS:
1002	SV *next	1050	Coro::State::transfer = 1
1003	int flags	1051	Coro::schedule = 2
1004	PROTOTYPE: @	1052	Coro::cede = 3
		1053	Coro::Cont::yield = 4
1005	CODE:	1054	CODE:
1006	PUTBACK;	1055	{
1007	SV_CORO (next, "Coro::transfer");	1056	struct transfer_args ta;
1008	SV_CORO (prev, "Coro::transfer");	1057
1009	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1058	switch (ix)
1010	SPAGAIN;	1059	{
		1060	case 0:
		1061	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1062	ta.next = 0;
		1063	ta.flags = TRANSFER_SET_STACKLEVEL;
		1064	break;
		1065
		1066	case 1:
		1067	if (items != 3)
		1068	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1069
		1070	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1071	break;
		1072
		1073	case 2:
		1074	prepare_schedule (&ta);
		1075	break;
		1076
		1077	case 3:
		1078	prepare_cede (&ta);
		1079	break;
		1080
		1081	case 4:
		1082	{
		1083	SV *yieldstack;
		1084	SV *sv;
		1085	AV *defav = GvAV (PL_defgv);
		1086
		1087	yieldstack = *hv_fetch (
		1088	(HV *)SvRV (GvSV (coro_current)),
		1089	"yieldstack", sizeof ("yieldstack") - 1,
		1090	0
		1091	);
		1092
		1093	/* set up @_ -- ugly */
		1094	av_clear (defav);
		1095	av_fill (defav, items - 1);
		1096	while (items--)
		1097	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1098
		1099	sv = av_pop ((AV *)SvRV (yieldstack));
		1100	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1101	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1102	ta.flags = 0;
		1103	SvREFCNT_dec (sv);
		1104	}
		1105	break;
		1106
		1107	}
		1108
		1109	TRANSFER (ta);
		1110	}
1011		1111
1012	void	1112	void
1013	DESTROY(coro)	1113	_clone_state_from (SV *dst, SV *src)
1014	Coro::State coro	1114	CODE:
1015	CODE:	1115	{
		1116	struct coro *coro_src = SvSTATE (src);
1016		1117
1017	if (coro->mainstack && coro->mainstack != main_mainstack)	1118	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1018	{
1019	struct coro temp;
1020		1119
1021	PUTBACK;	1120	++coro_src->refcnt;
1022	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1121	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1023	LOAD (aTHX_ coro);	1122	}
1024	SPAGAIN;
1025
1026	destroy_stacks (aTHX);
1027
1028	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1029	SPAGAIN;
1030
1031	coro->mainstack = 0;
1032	}
1033
1034	deallocate_stack (coro);
1035	SvREFCNT_dec (coro->args);
1036	Safefree (coro);
1037		1123
1038	void	1124	void
1039	_exit(code)	1125	_exit (code)
1040	int code	1126	int code
1041	PROTOTYPE: $	1127	PROTOTYPE: $
1042	CODE:	1128	CODE:
1043	_exit (code);	1129	_exit (code);
1044		1130
1045	MODULE = Coro::State PACKAGE = Coro::Cont	1131	int
		1132	cctx_count ()
		1133	CODE:
		1134	RETVAL = cctx_count;
		1135	OUTPUT:
		1136	RETVAL
1046		1137
1047	# this is slightly dirty (should expose a c-level api)	1138	int
1048		1139	cctx_idle ()
1049	void	1140	CODE:
1050	yield(...)	1141	RETVAL = cctx_idle;
1051	PROTOTYPE: @	1142	OUTPUT:
1052	CODE:	1143	RETVAL
1053	static SV *returnstk;
1054	SV *sv;
1055	AV *defav = GvAV (PL_defgv);
1056	struct coro *prev, *next;
1057
1058	if (!returnstk)
1059	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1060
1061	/* set up @_ -- ugly */
1062	av_clear (defav);
1063	av_fill (defav, items - 1);
1064	while (items--)
1065	av_store (defav, items, SvREFCNT_inc (ST(items)));
1066
1067	SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1068	sv = av_pop ((AV *)SvRV (returnstk));
1069	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1070	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1071	SvREFCNT_dec (sv);
1072
1073	transfer (aTHX_ prev, next, 0);
1074		1144
1075	MODULE = Coro::State PACKAGE = Coro	1145	MODULE = Coro::State PACKAGE = Coro
1076		1146
1077	# this is slightly dirty (should expose a c-level api)
1078
1079	BOOT:	1147	BOOT:
1080	{	1148	{
1081	int i;	1149	int i;
		1150
1082	HV *stash = gv_stashpv ("Coro", TRUE);	1151	coro_stash = gv_stashpv ("Coro", TRUE);
1083		1152
1084	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1153	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1085	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1154	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1086	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1155	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1087	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1156	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1088	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1157	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1089	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1158	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1090		1159
1091	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1160	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1092	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1161	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1093		1162
1094	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1163	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1098	SV *sv = perl_get_sv("Coro::API", 1);	1167	SV *sv = perl_get_sv("Coro::API", 1);
1099		1168
1100	coroapi.schedule = api_schedule;	1169	coroapi.schedule = api_schedule;
1101	coroapi.cede = api_cede;	1170	coroapi.cede = api_cede;
1102	coroapi.ready = api_ready;	1171	coroapi.ready = api_ready;
		1172	coroapi.is_ready = api_is_ready;
1103	coroapi.nready = &coro_nready;	1173	coroapi.nready = &coro_nready;
1104	coroapi.current = coro_current;	1174	coroapi.current = coro_current;
1105		1175
1106	GCoroAPI = &coroapi;	1176	GCoroAPI = &coroapi;
1107	sv_setiv(sv, (IV)&coroapi);	1177	sv_setiv (sv, (IV)&coroapi);
1108	SvREADONLY_on(sv);	1178	SvREADONLY_on (sv);
1109	}	1179	}
1110	}	1180	}
1111		1181
1112	#if !PERL_MICRO	1182	int
		1183	prio (Coro::State coro, int newprio = 0)
		1184	ALIAS:
		1185	nice = 1
		1186	CODE:
		1187	{
		1188	RETVAL = coro->prio;
1113		1189
1114	void	1190	if (items > 1)
		1191	{
		1192	if (ix)
		1193	newprio += coro->prio;
		1194
		1195	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1196	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1197
		1198	coro->prio = newprio;
		1199	}
		1200	}
		1201
		1202	SV *
1115	ready(self)	1203	ready (SV *self)
1116	SV * self
1117	PROTOTYPE: $	1204	PROTOTYPE: $
1118	CODE:	1205	CODE:
1119	api_ready (self);	1206	RETVAL = boolSV (api_ready (self));
		1207	OUTPUT:
		1208	RETVAL
1120		1209
1121	#endif	1210	SV *
		1211	is_ready (SV *self)
		1212	PROTOTYPE: $
		1213	CODE:
		1214	RETVAL = boolSV (api_is_ready (self));
		1215	OUTPUT:
		1216	RETVAL
1122		1217
1123	int	1218	int
1124	nready(...)	1219	nready (...)
1125	PROTOTYPE:	1220	PROTOTYPE:
1126	CODE:	1221	CODE:
1127	RETVAL = coro_nready;	1222	RETVAL = coro_nready;
1128	OUTPUT:	1223	OUTPUT:
1129	RETVAL	1224	RETVAL
1130		1225
		1226	MODULE = Coro::State PACKAGE = Coro::AIO
		1227
		1228	SV *
		1229	_get_state ()
		1230	CODE:
		1231	{
		1232	struct {
		1233	int errorno;
		1234	int laststype;
		1235	int laststatval;
		1236	Stat_t statcache;
		1237	} data;
		1238
		1239	data.errorno = errno;
		1240	data.laststype = PL_laststype;
		1241	data.laststatval = PL_laststatval;
		1242	data.statcache = PL_statcache;
		1243
		1244	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1245	}
		1246	OUTPUT:
		1247	RETVAL
		1248
1131	void	1249	void
1132	schedule(...)	1250	_set_state (char *data_)
1133	PROTOTYPE:	1251	PROTOTYPE: $
1134	CODE:	1252	CODE:
1135	api_schedule ();	1253	{
		1254	struct {
		1255	int errorno;
		1256	int laststype;
		1257	int laststatval;
		1258	Stat_t statcache;
		1259	} *data = (void *)data_;
1136		1260
1137	void	1261	errno = data->errorno;
1138	cede(...)	1262	PL_laststype = data->laststype;
1139	PROTOTYPE:	1263	PL_laststatval = data->laststatval;
1140	CODE:	1264	PL_statcache = data->statcache;
1141	api_cede ();	1265	}
1142

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