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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.56 by pcg, Thu Apr 1 02:41:05 2004 UTC vs.
Revision 1.113 by root, Thu Nov 30 20:54:24 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 __thread 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);
		217
		218	SvREFCNT_dec (av);
		219
		220	return 0;
275	}	221	}
276		222
277	#define PERL_MAGIC_coro PERL_MAGIC_ext	223	#define PERL_MAGIC_coro PERL_MAGIC_ext
278		224
279	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
280		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
281	/* the next two functions merely cache the padlists */	234	/* the next two functions merely cache the padlists */
282	STATIC void	235	static void
283	get_padlist (pTHX_ CV *cv)	236	get_padlist (CV *cv)
284	{	237	{
285	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	238	MAGIC *mg = CORO_MAGIC (cv);
		239	AV *av;
286		240
287	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
288	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
289	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
290	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	252	CvPADLIST (cv) = coro_clone_padlist (cv);
		253	#endif
		254	}
291	}	255	}
292		256
293	STATIC void	257	static void
294	put_padlist (pTHX_ CV *cv)	258	put_padlist (CV *cv)
295	{	259	{
296	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	260	MAGIC *mg = CORO_MAGIC (cv);
		261	AV *av;
297		262
298	if (!mg)	263	if (!mg)
299	{	264	{
300	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	265	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
301	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	266	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
302	mg->mg_virtual = &vtbl_coro;	267	mg->mg_virtual = &vtbl_coro;
303	mg->mg_obj = (SV *)newAV ();	268	mg->mg_obj = (SV *)newAV ();
304	}	269	}
305		270
306	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);
307	}	277	}
308		278
309	#define SB do {	279	#define SB do {
310	#define SE } while (0)	280	#define SE } while (0)
311		281
312	#define LOAD(state) load_state(aTHX_ (state));	282	#define LOAD(state) load_state((state));
313	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	283	#define SAVE(state,flags) save_state((state),(flags));
314		284
315	#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
316		286
317	static void	287	static void
318	load_state(pTHX_ Coro__State c)	288	load_state(Coro__State c)
319	{	289	{
320	PL_dowarn = c->dowarn;	290	#define VAR(name,type) PL_ ## name = c->name;
321	PL_in_eval = c->in_eval;	291	# include "state.h"
322		292	#undef VAR
323	PL_curstackinfo = c->curstackinfo;
324	PL_curstack = c->curstack;
325	PL_mainstack = c->mainstack;
326	PL_stack_sp = c->stack_sp;
327	PL_op = c->op;
328	PL_curpad = c->curpad;
329	PL_comppad = c->comppad;
330	PL_stack_base = c->stack_base;
331	PL_stack_max = c->stack_max;
332	PL_tmps_stack = c->tmps_stack;
333	PL_tmps_floor = c->tmps_floor;
334	PL_tmps_ix = c->tmps_ix;
335	PL_tmps_max = c->tmps_max;
336	PL_markstack = c->markstack;
337	PL_markstack_ptr = c->markstack_ptr;
338	PL_markstack_max = c->markstack_max;
339	PL_scopestack = c->scopestack;
340	PL_scopestack_ix = c->scopestack_ix;
341	PL_scopestack_max = c->scopestack_max;
342	PL_savestack = c->savestack;
343	PL_savestack_ix = c->savestack_ix;
344	PL_savestack_max = c->savestack_max;
345	PL_retstack = c->retstack;
346	PL_retstack_ix = c->retstack_ix;
347	PL_retstack_max = c->retstack_max;
348	PL_curcop = c->curcop;
349	PL_top_env = c->top_env;
350		293
351	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
352	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
353	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
354		297
…		…
357	CV *cv;	300	CV *cv;
358		301
359	/* now do the ugly restore mess */	302	/* now do the ugly restore mess */
360	while ((cv = (CV *)POPs))	303	while ((cv = (CV *)POPs))
361	{	304	{
362	AV *padlist = (AV *)POPs;
363
364	if (padlist)
365	{
366	put_padlist (aTHX_ cv); /* mark this padlist as available */	305	put_padlist (cv); /* mark this padlist as available */
367	CvPADLIST(cv) = padlist;	306	CvDEPTH (cv) = PTR2IV (POPs);
368	}	307	CvPADLIST (cv) = (AV *)POPs;
369
370	++CvDEPTH(cv);
371	}	308	}
372		309
373	PUTBACK;	310	PUTBACK;
374	}	311	}
375	}	312	}
376		313
377	static void	314	static void
378	save_state(pTHX_ Coro__State c, int flags)	315	save_state(Coro__State c, int flags)
379	{	316	{
380	{	317	{
381	dSP;	318	dSP;
382	I32 cxix = cxstack_ix;	319	I32 cxix = cxstack_ix;
383	PERL_CONTEXT *ccstk = cxstack;	320	PERL_CONTEXT *ccstk = cxstack;
…		…
397	PERL_CONTEXT *cx = &ccstk[cxix--];	334	PERL_CONTEXT *cx = &ccstk[cxix--];
398		335
399	if (CxTYPE(cx) == CXt_SUB)	336	if (CxTYPE(cx) == CXt_SUB)
400	{	337	{
401	CV *cv = cx->blk_sub.cv;	338	CV *cv = cx->blk_sub.cv;
		339
402	if (CvDEPTH(cv))	340	if (CvDEPTH (cv))
403	{	341	{
404	EXTEND (SP, CvDEPTH(cv)*2);	342	EXTEND (SP, 3);
405
406	while (--CvDEPTH(cv))
407	{
408	/* this tells the restore code to increment CvDEPTH */
409	PUSHs (Nullsv);
410	PUSHs ((SV *)cv);
411	}
412		343
413	PUSHs ((SV *)CvPADLIST(cv));	344	PUSHs ((SV *)CvPADLIST(cv));
		345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
414	PUSHs ((SV *)cv);	346	PUSHs ((SV *)cv);
415		347
416	get_padlist (aTHX_ cv); /* this is a monster */	348	CvDEPTH (cv) = 0;
		349	get_padlist (cv);
417	}	350	}
418	}	351	}
419	#ifdef CXt_FORMAT	352	#ifdef CXt_FORMAT
420	else if (CxTYPE(cx) == CXt_FORMAT)	353	else if (CxTYPE(cx) == CXt_FORMAT)
421	{	354	{
…		…
439		372
440	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;
441	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
442	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
443		376
444	c->dowarn = PL_dowarn;	377	#define VAR(name,type)c->name = PL_ ## name;
445	c->in_eval = PL_in_eval;	378	# include "state.h"
446		379	#undef VAR
447	c->curstackinfo = PL_curstackinfo;
448	c->curstack = PL_curstack;
449	c->mainstack = PL_mainstack;
450	c->stack_sp = PL_stack_sp;
451	c->op = PL_op;
452	c->curpad = PL_curpad;
453	c->comppad = PL_comppad;
454	c->stack_base = PL_stack_base;
455	c->stack_max = PL_stack_max;
456	c->tmps_stack = PL_tmps_stack;
457	c->tmps_floor = PL_tmps_floor;
458	c->tmps_ix = PL_tmps_ix;
459	c->tmps_max = PL_tmps_max;
460	c->markstack = PL_markstack;
461	c->markstack_ptr = PL_markstack_ptr;
462	c->markstack_max = PL_markstack_max;
463	c->scopestack = PL_scopestack;
464	c->scopestack_ix = PL_scopestack_ix;
465	c->scopestack_max = PL_scopestack_max;
466	c->savestack = PL_savestack;
467	c->savestack_ix = PL_savestack_ix;
468	c->savestack_max = PL_savestack_max;
469	c->retstack = PL_retstack;
470	c->retstack_ix = PL_retstack_ix;
471	c->retstack_max = PL_retstack_max;
472	c->curcop = PL_curcop;
473	c->top_env = PL_top_env;
474	}	380	}
475		381
476	/*	382	/*
477	* allocate various perl stacks. This is an exact copy	383	* allocate various perl stacks. This is an exact copy
478	* of perl.c:init_stacks, except that it uses less memory	384	* of perl.c:init_stacks, except that it uses less memory
479	* on the (sometimes correct) assumption that coroutines do	385	* on the (sometimes correct) assumption that coroutines do
480	* not usually need a lot of stackspace.	386	* not usually need a lot of stackspace.
481	*/	387	*/
482	STATIC void	388	static void
483	coro_init_stacks (pTHX)	389	coro_init_stacks ()
484	{	390	{
485	LOCK;
486
487	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
488	PL_curstackinfo->si_type = PERLSI_MAIN;	392	PL_curstackinfo->si_type = PERLSI_MAIN;
489	PL_curstack = PL_curstackinfo->si_stack;	393	PL_curstack = PL_curstackinfo->si_stack;
490	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
491		395
…		…
512		416
513	New(54,PL_savestack,96,ANY);	417	New(54,PL_savestack,96,ANY);
514	PL_savestack_ix = 0;	418	PL_savestack_ix = 0;
515	PL_savestack_max = 96;	419	PL_savestack_max = 96;
516		420
		421	#if !PERL_VERSION_ATLEAST (5,9,0)
517	New(54,PL_retstack,8,OP*);	422	New(54,PL_retstack,8,OP*);
518	PL_retstack_ix = 0;	423	PL_retstack_ix = 0;
519	PL_retstack_max = 8;	424	PL_retstack_max = 8;
520		425	#endif
521	UNLOCK;
522	}	426	}
523		427
524	/*	428	/*
525	* destroy the stacks, the callchain etc...	429	* destroy the stacks, the callchain etc...
526	*/	430	*/
527	STATIC void	431	static void
528	destroy_stacks(pTHX)	432	coro_destroy_stacks ()
529	{	433	{
530	if (!IN_DESTRUCT)	434	if (!IN_DESTRUCT)
531	{	435	{
532	/* is this ugly, I ask? */	436	/* is this ugly, I ask? */
533	LEAVE_SCOPE (0);	437	LEAVE_SCOPE (0);
534		438
535	/* sure it is, but more important: is it correct?? :/ */	439	/* sure it is, but more important: is it correct?? :/ */
536	FREETMPS;	440	FREETMPS;
		441
		442	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
537	}	443	}
538		444
539	while (PL_curstackinfo->si_next)	445	while (PL_curstackinfo->si_next)
540	PL_curstackinfo = PL_curstackinfo->si_next;	446	PL_curstackinfo = PL_curstackinfo->si_next;
541		447
542	while (PL_curstackinfo)	448	while (PL_curstackinfo)
543	{	449	{
544	PERL_SI *p = PL_curstackinfo->si_prev;	450	PERL_SI *p = PL_curstackinfo->si_prev;
545		451
546	{	452	{ /*D*//*remove*/
547	dSP;	453	dSP;
548	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	454	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
549	PUTBACK; /* possibly superfluous */	455	PUTBACK; /* possibly superfluous */
550	}	456	}
551		457
552	if (!IN_DESTRUCT)	458	if (!IN_DESTRUCT)
553	{	459	{
554	dounwind(-1);	460	dounwind (-1);/*D*//*remove*/
555	SvREFCNT_dec(PL_curstackinfo->si_stack);	461	SvREFCNT_dec (PL_curstackinfo->si_stack);
556	}	462	}
557		463
558	Safefree(PL_curstackinfo->si_cxstack);	464	Safefree (PL_curstackinfo->si_cxstack);
559	Safefree(PL_curstackinfo);	465	Safefree (PL_curstackinfo);
560	PL_curstackinfo = p;	466	PL_curstackinfo = p;
561	}	467	}
562		468
563	Safefree(PL_tmps_stack);	469	Safefree (PL_tmps_stack);
564	Safefree(PL_markstack);	470	Safefree (PL_markstack);
565	Safefree(PL_scopestack);	471	Safefree (PL_scopestack);
566	Safefree(PL_savestack);	472	Safefree (PL_savestack);
		473	#if !PERL_VERSION_ATLEAST (5,9,0)
567	Safefree(PL_retstack);	474	Safefree (PL_retstack);
568	}
569
570	static void
571	allocate_stack (Coro__State ctx, int alloc)
572	{
573	coro_stack *stack;
574
575	New (0, stack, 1, coro_stack);
576
577	stack->refcnt = 1;
578	stack->usecnt = 1;
579	stack->gencnt = ctx->gencnt = 0;
580
581	if (alloc)
582	{
583	#if HAVE_MMAP
584	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
585	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
586	if (stack->sptr == (void *)-1)
587	#endif	475	#endif
588	{
589	/*FIXME*//*D*//* reasonable stack size! */
590	stack->ssize = - (8192 * sizeof (long));
591	New (0, stack->sptr, 8192, long);
592	}
593	}
594	else
595	stack->sptr = 0;
596
597	ctx->stack = stack;
598	}	476	}
599		477
600	static void	478	static void
601	deallocate_stack (Coro__State ctx)	479	setup_coro (struct coro *coro)
602	{
603	coro_stack *stack = ctx->stack;
604
605	ctx->stack = 0;
606
607	if (stack)
608	{
609	if (!--stack->refcnt)
610	{
611	#ifdef HAVE_MMAP
612	if (stack->ssize > 0 && stack->sptr)
613	munmap (stack->sptr, stack->ssize);
614	else
615	#endif
616	Safefree (stack->sptr);
617
618	Safefree (stack);
619	}
620	else if (ctx->gencnt == stack->gencnt)
621	--stack->usecnt;
622	}
623	}
624
625	static void
626	setup_coro (void *arg)
627	{	480	{
628	/*	481	/*
629	* emulate part of the perl startup here.	482	* emulate part of the perl startup here.
630	*/	483	*/
631	dTHX;
632	dSP;
633	Coro__State ctx = (Coro__State)arg;
634	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
635		484
636	coro_init_stacks (aTHX);	485	coro_init_stacks ();
		486
637	/*PL_curcop = 0;*/	487	PL_curcop = 0;
638	/*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
639	SvREFCNT_dec (GvAV (PL_defgv));	498	SvREFCNT_dec (GvAV (PL_defgv));
640	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	499	GvAV (PL_defgv) = coro->args; coro->args = 0;
641		500
642	SPAGAIN;
643
644	if (ctx->stack)
645	{
646	ctx->cursp = 0;
647
648	PUSHMARK(SP);
649	PUTBACK;
650	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
651
652	if (SvTRUE (ERRSV))
653	croak (NULL);
654	else
655	croak ("FATAL: CCTXT coroutine returned!");
656	}
657	else
658	{
659	UNOP myop;
660
661	PL_op = (OP *)&myop;
662
663	Zero(&myop, 1, UNOP);	501	Zero (&myop, 1, LOGOP);
664	myop.op_next = Nullop;	502	myop.op_next = Nullop;
665	myop.op_flags = OPf_WANT_VOID;	503	myop.op_flags = OPf_WANT_VOID;
666		504
		505	PL_op = (OP *)&myop;
		506
667	PUSHMARK(SP);	507	PUSHMARK (SP);
668	XPUSHs (sub_init);	508	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
669	/*
670	* the next line is slightly wrong, as PL_op->op_next
671	* is actually being executed so we skip the first op.
672	* that doesn't matter, though, since it is only
673	* pp_nextstate and we never return...
674	* ah yes, and I don't care anyways ;)
675	*/
676	PUTBACK;	509	PUTBACK;
677	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	510	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
678	SPAGAIN;	511	SPAGAIN;
679		512
680	ENTER; /* necessary e.g. for dounwind */	513	ENTER; /* necessary e.g. for dounwind */
681	}	514	}
682	}	515	}
683		516
684	static void	517	static void
685	continue_coro (void *arg)	518	free_coro_mortal ()
686	{	519	{
687	/*
688	* this is a _very_ stripped down perl interpreter ;)
689	*/
690	dTHX;
691	Coro__State ctx = (Coro__State)arg;
692	JMPENV coro_start_env;
693
694	PL_top_env = &ctx->start_env;
695
696	ctx->cursp = 0;
697	PL_op = PL_op->op_next;
698	CALLRUNOPS(aTHX);
699
700	abort ();
701	}
702
703	STATIC void
704	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
705	{
706	dSTACKLEVEL;
707
708	if (prev != next)
709	{
710	if (next->mainstack)
711	{
712	LOCK;
713	SAVE (prev, flags);
714	LOAD (next);
715	UNLOCK;
716
717	/* mark this state as in-use */
718	next->mainstack = 0;
719	next->tmps_ix = -2;
720
721	/* stacklevel changed? if yes, grab the stack for us! */
722	if (flags & TRANSFER_SAVE_CCTXT)
723	{
724	if (!prev->stack)
725	allocate_stack (prev, 0);
726	else if (prev->cursp != stacklevel
727	&& prev->stack->usecnt > 1)
728	{
729	prev->gencnt = ++prev->stack->gencnt;
730	prev->stack->usecnt = 1;
731	}
732
733	/* has our stack been invalidated? */
734	if (next->stack && next->stack->gencnt != next->gencnt)
735	{
736	deallocate_stack (next);
737	allocate_stack (next, 1);
738	coro_create (&(next->stack->cctx),
739	continue_coro, (void *)next,
740	next->stack->sptr, labs (next->stack->ssize));
741	}
742
743	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
744	prev->cursp = stacklevel;
745	/* don't add any code here */
746	}
747	else
748	next->cursp = stacklevel;
749	}
750	else if (next->tmps_ix == -2)
751	croak ("tried to transfer to running coroutine");
752	else
753	{
754	LOCK;
755	SAVE (prev, -1); /* first get rid of the old state */
756	UNLOCK;
757
758	if (flags & TRANSFER_SAVE_CCTXT)
759	{
760	if (!prev->stack)
761	allocate_stack (prev, 0);
762
763	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
764	{
765	PL_top_env = &next->start_env;
766
767	setup_coro (next);
768	next->cursp = stacklevel;
769
770	prev->stack->refcnt++;
771	prev->stack->usecnt++;
772	next->stack = prev->stack;
773	next->gencnt = prev->gencnt;
774	}
775	else
776	{
777	assert (!next->stack);
778	allocate_stack (next, 1);
779	coro_create (&(next->stack->cctx),
780	setup_coro, (void *)next,
781	next->stack->sptr, labs (next->stack->ssize));
782	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
783	prev->cursp = stacklevel;
784	/* don't add any code here */
785	}
786	}
787	else
788	{
789	setup_coro (next);
790	next->cursp = stacklevel;
791	}
792	}
793	}
794
795	LOCK;
796	if (coro_mortal)	520	if (coro_mortal)
797	{	521	{
798	SvREFCNT_dec (coro_mortal);	522	SvREFCNT_dec (coro_mortal);
799	coro_mortal = 0;	523	coro_mortal = 0;
800	}	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() */
801	UNLOCK;	550	UNLOCK;
802	}
803		551
804	#define SV_CORO(sv,func) \	552	/*
805	do { \	553	* this is a _very_ stripped down perl interpreter ;)
806	if (SvROK (sv)) \	554	*/
807	sv = SvRV (sv); \	555	PL_top_env = &PL_start_env;
808	\
809	if (SvTYPE (sv) == SVt_PVHV) \
810	{ \
811	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
812	\
813	if (!he) \
814	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
815	\
816	(sv) = SvRV (HeVAL(he)); \
817	} \
818	\
819	/* must also be changed inside Coro::Cont::yield */ \
820	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
821	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
822	\
823	} while(0)
824		556
825	#define SvSTATE(sv) (struct coro *)SvIV (sv)	557	/* inject call to cctx_init */
		558	prepare_cctx ((coro_cctx *)arg);
826		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	if (!prev->flags & CF_RUNNING)
		688	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		689
		690	if (next->flags & CF_RUNNING)
		691	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		692
		693	prev->flags &= ~CF_RUNNING;
		694	next->flags |= CF_RUNNING;
		695
		696	LOCK;
		697
		698	if (next->mainstack)
		699	{
		700	/* coroutine already started */
		701	SAVE (prev, flags);
		702	LOAD (next);
		703	}
		704	else
		705	{
		706	/* need to start coroutine */
		707	/* first get rid of the old state */
		708	SAVE (prev, -1);
		709	/* setup coroutine call */
		710	setup_coro (next);
		711	/* need a new stack */
		712	assert (!next->stack);
		713	}
		714
		715	prev__cctx = prev->cctx;
		716
		717	/* possibly "free" the cctx */
		718	if (prev__cctx->idle_sp == STACKLEVEL)
		719	{
		720	assert (PL_top_env == prev__cctx->top_env);
		721
		722	cctx_put (prev__cctx);
		723	prev->cctx = 0;
		724	}
		725	else if (prev__cctx->idle_sp) //D
		726	fprintf (stderr, "coro %p has own stack %p-%p\n", prev__cctx, prev__cctx->idle_sp, STACKLEVEL);//D
		727
		728	if (!next->cctx)
		729	next->cctx = cctx_get ();
		730
		731	if (prev__cctx != next->cctx)
		732	{
		733	assert ( prev__cctx->inuse);
		734	assert (!next->cctx->inuse);
		735
		736	prev__cctx->inuse = 0;
		737	next->cctx->inuse = 1;
		738
		739	prev__cctx->top_env = PL_top_env;
		740	PL_top_env = next->cctx->top_env;
		741	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		742	}
		743
		744	free_coro_mortal ();
		745
		746	UNLOCK;
		747	}
		748	}
		749
		750	struct transfer_args
		751	{
		752	struct coro *prev, *next;
		753	int flags;
		754	};
		755
		756	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		757
		758	static void
		759	coro_state_destroy (struct coro *coro)
		760	{
		761	if (coro->refcnt--)
		762	return;
		763
		764	if (coro->flags & CF_RUNNING)
		765	croak ("FATAL: tried to destroy currently running coroutine");
		766
		767	if (coro->mainstack && coro->mainstack != main_mainstack)
		768	{
		769	struct coro temp;
		770
		771	SAVE ((&temp), TRANSFER_SAVE_ALL);
		772	LOAD (coro);
		773
		774	coro_destroy_stacks ();
		775
		776	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		777
		778	coro->mainstack = 0;
		779	}
		780
		781	cctx_free (coro->cctx);
		782	SvREFCNT_dec (coro->args);
		783	Safefree (coro);
		784	}
		785
827	static void	786	static int
		787	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		788	{
		789	struct coro *coro = (struct coro *)mg->mg_ptr;
		790	mg->mg_ptr = 0;
		791
		792	coro_state_destroy (coro);
		793
		794	return 0;
		795	}
		796
		797	static int
		798	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		799	{
		800	struct coro *coro = (struct coro *)mg->mg_ptr;
		801
		802	++coro->refcnt;
		803
		804	return 0;
		805	}
		806
		807	static MGVTBL coro_state_vtbl = {
		808	0, 0, 0, 0,
		809	coro_state_clear,
		810	0,
		811	#ifdef MGf_DUP
		812	coro_state_dup,
		813	#else
		814	# define MGf_DUP 0
		815	#endif
		816	};
		817
		818	static struct coro *
		819	SvSTATE (SV *coro)
		820	{
		821	HV *stash;
		822	MAGIC *mg;
		823
		824	if (SvROK (coro))
		825	coro = SvRV (coro);
		826
		827	stash = SvSTASH (coro);
		828	if (stash != coro_stash && stash != coro_state_stash)
		829	{
		830	/* very slow, but rare, check */
		831	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		832	croak ("Coro::State object required");
		833	}
		834
		835	mg = SvMAGIC (coro);
		836	assert (mg->mg_type == PERL_MAGIC_ext);
		837	return (struct coro *)mg->mg_ptr;
		838	}
		839
		840	static void
		841	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		842	{
		843	ta->prev = SvSTATE (prev);
		844	ta->next = SvSTATE (next);
		845	ta->flags = flags;
		846	}
		847
		848	static void
828	api_transfer(pTHX_ SV *prev, SV *next, int flags)	849	api_transfer (SV *prev, SV *next, int flags)
829	{	850	{
830	SV_CORO (prev, "Coro::transfer");	851	dTHX;
831	SV_CORO (next, "Coro::transfer");	852	struct transfer_args ta;
832		853
833	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	854	prepare_transfer (&ta, prev, next, flags);
		855	TRANSFER (ta);
834	}	856	}
835		857
836	/** Coro ********************************************************************/	858	/** Coro ********************************************************************/
837		859
838	#define PRIO_MAX 3	860	#define PRIO_MAX 3
…		…
842	#define PRIO_IDLE -3	864	#define PRIO_IDLE -3
843	#define PRIO_MIN -4	865	#define PRIO_MIN -4
844		866
845	/* for Coro.pm */	867	/* for Coro.pm */
846	static GV *coro_current, *coro_idle;	868	static GV *coro_current, *coro_idle;
847	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	869	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
848	static int coro_nready;	870	static int coro_nready;
849		871
850	static void	872	static void
851	coro_enq (pTHX_ SV *sv)	873	coro_enq (SV *coro_sv)
852	{	874	{
853	if (SvTYPE (sv) == SVt_PVHV)
854	{
855	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
856	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
857
858	prio = prio > PRIO_MAX ? PRIO_MAX
859	: prio < PRIO_MIN ? PRIO_MIN
860	: prio;
861
862	av_push (coro_ready [prio - PRIO_MIN], sv);	875	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
863	coro_nready++;	876	coro_nready++;
864
865	return;
866	}
867
868	croak ("Coro::ready tried to enqueue something that is not a coroutine");
869	}	877	}
870		878
871	static SV *	879	static SV *
872	coro_deq (pTHX_ int min_prio)	880	coro_deq (int min_prio)
873	{	881	{
874	int prio = PRIO_MAX - PRIO_MIN;	882	int prio = PRIO_MAX - PRIO_MIN;
875		883
876	min_prio -= PRIO_MIN;	884	min_prio -= PRIO_MIN;
877	if (min_prio < 0)	885	if (min_prio < 0)
878	min_prio = 0;	886	min_prio = 0;
879		887
880	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	888	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
881	if (av_len (coro_ready[prio]) >= 0)	889	if (AvFILLp (coro_ready [prio]) >= 0)
882	{	890	{
883	coro_nready--;	891	coro_nready--;
884	return av_shift (coro_ready[prio]);	892	return av_shift (coro_ready [prio]);
885	}	893	}
886		894
887	return 0;	895	return 0;
888	}	896	}
889		897
890	static void	898	static int
891	api_ready (SV *coro)	899	api_ready (SV *coro_sv)
		900	{
		901	struct coro *coro;
		902
		903	if (SvROK (coro_sv))
		904	coro_sv = SvRV (coro_sv);
		905
		906	coro = SvSTATE (coro_sv);
		907
		908	if (coro->flags & CF_READY)
		909	return 0;
		910
		911	if (coro->flags & CF_RUNNING)
		912	croak ("Coro::ready called on currently running coroutine");
		913
		914	coro->flags |= CF_READY;
		915
		916	LOCK;
		917	coro_enq (SvREFCNT_inc (coro_sv));
		918	UNLOCK;
		919
		920	return 1;
		921	}
		922
		923	static int
		924	api_is_ready (SV *coro_sv)
		925	{
		926	return !!SvSTATE (coro_sv)->flags & CF_READY;
		927	}
		928
		929	static void
		930	prepare_schedule (struct transfer_args *ta)
		931	{
		932	SV *current, *prev, *next;
		933
		934	current = GvSV (coro_current);
		935
		936	for (;;)
		937	{
		938	LOCK;
		939	next = coro_deq (PRIO_MIN);
		940	UNLOCK;
		941
		942	if (next)
		943	break;
		944
		945	{
		946	dSP;
		947
		948	ENTER;
		949	SAVETMPS;
		950
		951	PUSHMARK (SP);
		952	PUTBACK;
		953	call_sv (GvSV (coro_idle), G_DISCARD);
		954
		955	FREETMPS;
		956	LEAVE;
		957	}
		958	}
		959
		960	prev = SvRV (current);
		961	SvRV (current) = next;
		962
		963	/* free this only after the transfer */
		964	LOCK;
		965	free_coro_mortal ();
		966	UNLOCK;
		967	coro_mortal = prev;
		968
		969	ta->prev = SvSTATE (prev);
		970	ta->next = SvSTATE (next);
		971	ta->flags = TRANSFER_SAVE_ALL;
		972
		973	ta->next->flags &= ~CF_READY;
		974	}
		975
		976	static void
		977	prepare_cede (struct transfer_args *ta)
		978	{
		979	api_ready (GvSV (coro_current));
		980
		981	prepare_schedule (ta);
		982	}
		983
		984	static void
		985	api_schedule (void)
892	{	986	{
893	dTHX;	987	dTHX;
		988	struct transfer_args ta;
894		989
895	if (SvROK (coro))	990	prepare_schedule (&ta);
896	coro = SvRV (coro);	991	TRANSFER (ta);
897
898	LOCK;
899	coro_enq (aTHX_ SvREFCNT_inc (coro));
900	UNLOCK;
901	}	992	}
902		993
903	static void	994	static void
904	api_schedule (void)	995	api_cede (void)
905	{	996	{
906	dTHX;	997	dTHX;
		998	struct transfer_args ta;
907		999
908	SV *prev, *next;	1000	prepare_cede (&ta);
909		1001	TRANSFER (ta);
910	LOCK;
911
912	prev = SvRV (GvSV (coro_current));
913	next = coro_deq (aTHX_ PRIO_MIN);
914
915	if (!next)
916	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
917
918	/* free this only after the transfer */
919	coro_mortal = prev;
920	SV_CORO (prev, "Coro::schedule");
921
922	SvRV (GvSV (coro_current)) = next;
923
924	SV_CORO (next, "Coro::schedule");
925
926	UNLOCK;
927
928	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
929	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
930	}
931
932	static void
933	api_cede (void)
934	{
935	dTHX;
936
937	LOCK;
938	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
939	UNLOCK;
940
941	api_schedule ();
942	}	1002	}
943		1003
944	MODULE = Coro::State PACKAGE = Coro::State	1004	MODULE = Coro::State PACKAGE = Coro::State
945		1005
946	PROTOTYPES: ENABLE	1006	PROTOTYPES: DISABLE
947		1007
948	BOOT:	1008	BOOT:
949	{ /* {} necessary for stoopid perl-5.6.x */	1009	{
950	#ifdef USE_ITHREADS	1010	#ifdef USE_ITHREADS
951	MUTEX_INIT (&coro_mutex);	1011	MUTEX_INIT (&coro_mutex);
952	#endif	1012	#endif
		1013	BOOT_PAGESIZE;
953		1014
954	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
955	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
956	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1015	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
957		1016
958	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1017	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
959	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1018	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
960	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1019	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
961	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
962		1020
963	main_mainstack = PL_mainstack;	1021	main_mainstack = PL_mainstack;
964		1022
965	coroapi.ver = CORO_API_VERSION;	1023	coroapi.ver = CORO_API_VERSION;
966	coroapi.transfer = api_transfer;	1024	coroapi.transfer = api_transfer;
967	}
968		1025
969	Coro::State	1026	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
970	_newprocess(args)	1027	}
971	SV * args	1028
972	PROTOTYPE: $	1029	SV *
		1030	new (char *klass, ...)
973	CODE:	1031	CODE:
974	Coro__State coro;	1032	{
		1033	struct coro *coro;
		1034	HV *hv;
		1035	int i;
975		1036
976	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
977	croak ("Coro::State::_newprocess expects an arrayref");
978
979	Newz (0, coro, 1, struct coro);	1037	Newz (0, coro, 1, struct coro);
		1038	coro->args = newAV ();
980		1039
981	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1040	hv = newHV ();
982	coro->mainstack = 0; /* actual work is done inside transfer */	1041	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
983	coro->stack = 0;	1042	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
984		1043
985	/* same as JMPENV_BOOTSTRAP */	1044	for (i = 1; i < items; i++)
986	/* we might be able to recycle start_env, but safe is safe */	1045	av_push (coro->args, newSVsv (ST (i)));
987	//Zero(&coro->start_env, 1, JMPENV);	1046	}
988	coro->start_env.je_ret = -1;
989	coro->start_env.je_mustcatch = TRUE;
990
991	RETVAL = coro;
992	OUTPUT:	1047	OUTPUT:
993	RETVAL	1048	RETVAL
994		1049
995	void	1050	void
996	transfer(prev, next, flags)	1051	_set_stacklevel (...)
997	SV *prev	1052	ALIAS:
998	SV *next	1053	Coro::State::transfer = 1
999	int flags	1054	Coro::schedule = 2
1000	PROTOTYPE: @	1055	Coro::cede = 3
		1056	Coro::Cont::yield = 4
1001	CODE:	1057	CODE:
1002	PUTBACK;	1058	{
1003	SV_CORO (next, "Coro::transfer");	1059	struct transfer_args ta;
1004	SV_CORO (prev, "Coro::transfer");	1060
1005	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1061	switch (ix)
1006	SPAGAIN;	1062	{
		1063	case 0:
		1064	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1065	ta.next = 0;
		1066	ta.flags = TRANSFER_SET_STACKLEVEL;
		1067	break;
		1068
		1069	case 1:
		1070	if (items != 3)
		1071	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1072
		1073	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1074	break;
		1075
		1076	case 2:
		1077	prepare_schedule (&ta);
		1078	break;
		1079
		1080	case 3:
		1081	prepare_cede (&ta);
		1082	break;
		1083
		1084	case 4:
		1085	{
		1086	SV *yieldstack;
		1087	SV *sv;
		1088	AV *defav = GvAV (PL_defgv);
		1089
		1090	yieldstack = *hv_fetch (
		1091	(HV *)SvRV (GvSV (coro_current)),
		1092	"yieldstack", sizeof ("yieldstack") - 1,
		1093	0
		1094	);
		1095
		1096	/* set up @_ -- ugly */
		1097	av_clear (defav);
		1098	av_fill (defav, items - 1);
		1099	while (items--)
		1100	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1101
		1102	sv = av_pop ((AV *)SvRV (yieldstack));
		1103	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1104	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1105	ta.flags = 0;
		1106	SvREFCNT_dec (sv);
		1107	}
		1108	break;
		1109
		1110	}
		1111
		1112	TRANSFER (ta);
		1113	}
1007		1114
1008	void	1115	void
1009	DESTROY(coro)	1116	_clone_state_from (SV *dst, SV *src)
1010	Coro::State coro	1117	CODE:
1011	CODE:	1118	{
		1119	struct coro *coro_src = SvSTATE (src);
1012		1120
1013	if (coro->mainstack && coro->mainstack != main_mainstack)	1121	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1014	{
1015	struct coro temp;
1016		1122
1017	PUTBACK;	1123	++coro_src->refcnt;
1018	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1124	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1019	LOAD(aTHX_ coro);	1125	}
1020	SPAGAIN;
1021
1022	destroy_stacks (aTHX);
1023
1024	LOAD((&temp)); /* this will get rid of defsv etc.. */
1025	SPAGAIN;
1026
1027	coro->mainstack = 0;
1028	}
1029
1030	deallocate_stack (coro);
1031	SvREFCNT_dec (coro->args);
1032	Safefree (coro);
1033		1126
1034	void	1127	void
1035	_exit(code)	1128	_exit (code)
1036	int code	1129	int code
1037	PROTOTYPE: $	1130	PROTOTYPE: $
1038	CODE:	1131	CODE:
1039	_exit (code);	1132	_exit (code);
1040		1133
1041	MODULE = Coro::State PACKAGE = Coro::Cont	1134	int
		1135	cctx_count ()
		1136	CODE:
		1137	RETVAL = cctx_count;
		1138	OUTPUT:
		1139	RETVAL
1042		1140
1043	# this is slightly dirty (should expose a c-level api)	1141	int
1044		1142	cctx_idle ()
1045	void	1143	CODE:
1046	yield(...)	1144	RETVAL = cctx_idle;
1047	PROTOTYPE: @	1145	OUTPUT:
1048	CODE:	1146	RETVAL
1049	static SV *returnstk;
1050	SV *sv;
1051	AV *defav = GvAV (PL_defgv);
1052	struct coro *prev, *next;
1053
1054	if (!returnstk)
1055	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1056
1057	/* set up @_ -- ugly */
1058	av_clear (defav);
1059	av_fill (defav, items - 1);
1060	while (items--)
1061	av_store (defav, items, SvREFCNT_inc (ST(items)));
1062
1063	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1064	sv = av_pop ((AV *)SvRV (returnstk));
1065	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1066	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1067	SvREFCNT_dec (sv);
1068
1069	transfer(aTHX_ prev, next, 0);
1070		1147
1071	MODULE = Coro::State PACKAGE = Coro	1148	MODULE = Coro::State PACKAGE = Coro
1072		1149
1073	# this is slightly dirty (should expose a c-level api)
1074
1075	BOOT:	1150	BOOT:
1076	{	1151	{
1077	int i;	1152	int i;
		1153
1078	HV *stash = gv_stashpv ("Coro", TRUE);	1154	coro_stash = gv_stashpv ("Coro", TRUE);
1079		1155
1080	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1156	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1081	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1157	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1082	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1158	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1083	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1159	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1084	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1160	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1085	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1161	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1086		1162
1087	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1163	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1088	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1164	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1089		1165
1090	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1166	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1094	SV *sv = perl_get_sv("Coro::API", 1);	1170	SV *sv = perl_get_sv("Coro::API", 1);
1095		1171
1096	coroapi.schedule = api_schedule;	1172	coroapi.schedule = api_schedule;
1097	coroapi.cede = api_cede;	1173	coroapi.cede = api_cede;
1098	coroapi.ready = api_ready;	1174	coroapi.ready = api_ready;
		1175	coroapi.is_ready = api_is_ready;
1099	coroapi.nready = &coro_nready;	1176	coroapi.nready = &coro_nready;
1100	coroapi.current = coro_current;	1177	coroapi.current = coro_current;
1101		1178
1102	GCoroAPI = &coroapi;	1179	GCoroAPI = &coroapi;
1103	sv_setiv(sv, (IV)&coroapi);	1180	sv_setiv (sv, (IV)&coroapi);
1104	SvREADONLY_on(sv);	1181	SvREADONLY_on (sv);
1105	}	1182	}
1106	}	1183	}
1107		1184
1108	#if !PERL_MICRO	1185	int
		1186	prio (Coro::State coro, int newprio = 0)
		1187	ALIAS:
		1188	nice = 1
		1189	CODE:
		1190	{
		1191	RETVAL = coro->prio;
1109		1192
1110	void	1193	if (items > 1)
		1194	{
		1195	if (ix)
		1196	newprio += coro->prio;
		1197
		1198	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1199	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1200
		1201	coro->prio = newprio;
		1202	}
		1203	}
		1204
		1205	SV *
1111	ready(self)	1206	ready (SV *self)
1112	SV * self
1113	PROTOTYPE: $	1207	PROTOTYPE: $
1114	CODE:	1208	CODE:
1115	api_ready (self);	1209	RETVAL = boolSV (api_ready (self));
		1210	OUTPUT:
		1211	RETVAL
1116		1212
1117	#endif	1213	SV *
		1214	is_ready (SV *self)
		1215	PROTOTYPE: $
		1216	CODE:
		1217	RETVAL = boolSV (api_is_ready (self));
		1218	OUTPUT:
		1219	RETVAL
1118		1220
1119	int	1221	int
1120	nready(...)	1222	nready (...)
1121	PROTOTYPE:	1223	PROTOTYPE:
1122	CODE:	1224	CODE:
1123	RETVAL = coro_nready;	1225	RETVAL = coro_nready;
1124	OUTPUT:	1226	OUTPUT:
1125	RETVAL	1227	RETVAL
1126		1228
		1229	MODULE = Coro::State PACKAGE = Coro::AIO
		1230
		1231	SV *
		1232	_get_state ()
		1233	CODE:
		1234	{
		1235	struct {
		1236	int errorno;
		1237	int laststype;
		1238	int laststatval;
		1239	Stat_t statcache;
		1240	} data;
		1241
		1242	data.errorno = errno;
		1243	data.laststype = PL_laststype;
		1244	data.laststatval = PL_laststatval;
		1245	data.statcache = PL_statcache;
		1246
		1247	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1248	}
		1249	OUTPUT:
		1250	RETVAL
		1251
1127	void	1252	void
1128	schedule(...)	1253	_set_state (char *data_)
1129	PROTOTYPE:	1254	PROTOTYPE: $
1130	CODE:	1255	CODE:
1131	api_schedule ();	1256	{
		1257	struct {
		1258	int errorno;
		1259	int laststype;
		1260	int laststatval;
		1261	Stat_t statcache;
		1262	} *data = (void *)data_;
1132		1263
1133	void	1264	errno = data->errorno;
1134	cede(...)	1265	PL_laststype = data->laststype;
1135	PROTOTYPE:	1266	PL_laststatval = data->laststatval;
1136	CODE:	1267	PL_statcache = data->statcache;
1137	api_cede ();	1268	}
1138

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