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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.35 by root, Mon Sep 24 01:36:20 2001 UTC vs.
Revision 1.105 by root, Mon Nov 27 02:01:33 2006 UTC

		1	#include "libcoro/coro.c"
		2
1	#include "EXTERN.h"	3	#include "EXTERN.h"
2	#include "perl.h"	4	#include "perl.h"
3	#include "XSUB.h"	5	#include "XSUB.h"
4		6
5	#include "libcoro/coro.c"	7	#include "patchlevel.h"
6		8
		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)
		20	# ifndef PL_ppaddr
		21	# define PL_ppaddr ppaddr
		22	# endif
		23	# ifndef call_sv
		24	# define call_sv perl_call_sv
		25	# endif
		26	# ifndef get_sv
		27	# define get_sv perl_get_sv
		28	# endif
		29	# ifndef get_cv
		30	# define get_cv perl_get_cv
		31	# endif
		32	# ifndef IS_PADGV
		33	# define IS_PADGV(v) 0
		34	# endif
		35	# ifndef IS_PADCONST
		36	# define IS_PADCONST(v) 0
		37	# endif
		38	#endif
		39
7	#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
8		50
9	#ifdef HAVE_MMAP	51	#ifdef HAVE_MMAP
10	# include <unistd.h>	52	# include <unistd.h>
11	# include <sys/mman.h>	53	# include <sys/mman.h>
12	# ifndef MAP_ANON
13	# ifdef MAP_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
14	# define MAP_ANON MAP_ANONYMOUS	55	# ifdef MAP_ANON
		56	# define MAP_ANONYMOUS MAP_ANON
15	# else	57	# else
16	# undef HAVE_MMAP	58	# undef HAVE_MMAP
17	# endif	59	# endif
18	# 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
19	#endif	68	# endif
20		69	#endif
21	#define MAY_FLUSH /* increases codesize and is rarely used */
22
23	#define SUB_INIT "Coro::State::initialize"
24	#define UCORO_STATE "_coro_state"
25		70
26	/* The next macro should declare a variable stacklevel that contains and approximation	71	/* The next macro should declare a variable stacklevel that contains and approximation
27	* to the current C stack pointer. Its property is that it changes with each call	72	* to the current C stack pointer. Its property is that it changes with each call
28	* and should be unique. */	73	* and should be unique. */
		74	#define dSTACKLEVEL int stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	75	#define STACKLEVEL ((void *)&stacklevel)
30		76
31	#define IN_DESTRUCT (PL_main_cv == Nullcv)	77	#define IN_DESTRUCT (PL_main_cv == Nullcv)
32		78
33	#define labs(l) ((l) >= 0 ? (l) : -(l))	79	#if __GNUC__ >= 3
		80	# define attribute(x) __attribute__(x)
		81	#else
		82	# define attribute(x)
		83	#endif
		84
		85	#define NOINLINE attribute ((noinline))
34		86
35	#include "CoroAPI.h"	87	#include "CoroAPI.h"
36		88
		89	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
		90
		91	#ifdef USE_ITHREADS
		92	static perl_mutex coro_mutex;
		93	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		94	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		95	#else
		96	# define LOCK (void)0
		97	# define UNLOCK (void)0
		98	#endif
		99
37	static struct CoroAPI coroapi;	100	static struct CoroAPI coroapi;
		101	static AV *main_mainstack; /* used to differentiate between $main and others */
		102	static HV *coro_state_stash, *coro_stash;
		103	static SV *coro_mortal; /* will be freed after next transfer */
38		104
39	/* this is actually not only the c stack but also c registers etc... */	105	/* this is a structure representing a c-level coroutine */
40	typedef struct {	106	typedef struct coro_stack {
41	int refcnt; /* pointer reference counter */	107	struct coro_stack *next;
42	int usecnt; /* shared by how many coroutines */
43	int gencnt; /* generation counter */
44		108
45	coro_context cctx;	109	/* the stack */
46
47	void *sptr;	110	void *sptr;
48	long ssize; /* positive == mmap, otherwise malloc */	111	long ssize; /* positive == mmap, otherwise malloc */
		112
		113	/* cpu state */
		114	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		115	JMPENV *top_env;
		116	coro_context cctx;
		117
		118	#if USE_VALGRIND
		119	int valgrind_id;
		120	#endif
49	} coro_stack;	121	} coro_stack;
50		122
		123	/* this is a structure representing a perl-level coroutine */
51	struct coro {	124	struct coro {
52	/* the optional C context */	125	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	126	coro_stack *stack;
54	void *cursp;	127
		128	/* data associated with this coroutine (initial args) */
		129	AV *args;
55	int gencnt;	130	int refcnt;
56		131
57	/* optionally saved, might be zero */	132	/* optionally saved, might be zero */
58	AV *defav;	133	AV *defav;
59	SV *defsv;	134	SV *defsv;
60	SV *errsv;	135	SV *errsv;
…		…
68	AV *curstack;	143	AV *curstack;
69	AV *mainstack;	144	AV *mainstack;
70	SV **stack_sp;	145	SV **stack_sp;
71	OP *op;	146	OP *op;
72	SV **curpad;	147	SV **curpad;
		148	AV *comppad;
		149	CV *compcv;
73	SV **stack_base;	150	SV **stack_base;
74	SV **stack_max;	151	SV **stack_max;
75	SV **tmps_stack;	152	SV **tmps_stack;
76	I32 tmps_floor;	153	I32 tmps_floor;
77	I32 tmps_ix;	154	I32 tmps_ix;
…		…
86	I32 savestack_ix;	163	I32 savestack_ix;
87	I32 savestack_max;	164	I32 savestack_max;
88	OP **retstack;	165	OP **retstack;
89	I32 retstack_ix;	166	I32 retstack_ix;
90	I32 retstack_max;	167	I32 retstack_max;
		168	PMOP *curpm;
91	COP *curcop;	169	COP *curcop;
92	JMPENV *top_env;
93		170
94	/* data associated with this coroutine (initial args) */	171	/* coro process data */
95	AV *args;	172	int prio;
96	};	173	};
97		174
98	typedef struct coro *Coro__State;	175	typedef struct coro *Coro__State;
99	typedef struct coro *Coro__State_or_hashref;	176	typedef struct coro *Coro__State_or_hashref;
100		177
101	static AV *main_mainstack; /* used to differentiate between $main and others */	178	static AV *
102	static HV *coro_state_stash;	179	coro_clone_padlist (CV *cv)
103	static SV *ucoro_state_sv;
104	static U32 ucoro_state_hash;
105	static HV *padlist_cache;
106
107	/* mostly copied from op.c:cv_clone2 */
108	STATIC AV *
109	clone_padlist (AV *protopadlist)
110	{	180	{
111	AV *av;	181	AV *padlist = CvPADLIST (cv);
112	I32 ix;
113	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
114	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
115	SV **pname = AvARRAY (protopad_name);
116	SV **ppad = AvARRAY (protopad);
117	I32 fname = AvFILLp (protopad_name);
118	I32 fpad = AvFILLp (protopad);
119	AV *newpadlist, *newpad_name, *newpad;	182	AV *newpadlist, *newpad;
120	SV **npad;
121
122	newpad_name = newAV ();
123	for (ix = fname; ix >= 0; ix--)
124	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
125
126	newpad = newAV ();
127	av_fill (newpad, AvFILLp (protopad));
128	npad = AvARRAY (newpad);
129		183
130	newpadlist = newAV ();	184	newpadlist = newAV ();
131	AvREAL_off (newpadlist);	185	AvREAL_off (newpadlist);
132	av_store (newpadlist, 0, (SV *) newpad_name);	186	#if PERL_VERSION_ATLEAST (5,9,0)
		187	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		188	#else
		189	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		190	#endif
		191	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		192	--AvFILLp (padlist);
		193
		194	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
133	av_store (newpadlist, 1, (SV *) newpad);	195	av_store (newpadlist, 1, (SV *)newpad);
134		196
135	av = newAV (); /* will be @_ */	197	return newpadlist;
136	av_extend (av, 0);	198	}
137	av_store (newpad, 0, (SV *) av);
138	AvFLAGS (av) = AVf_REIFY;
139		199
140	for (ix = fpad; ix > 0; ix--)	200	static void
		201	free_padlist (AV *padlist)
		202	{
		203	/* may be during global destruction */
		204	if (SvREFCNT (padlist))
141	{	205	{
142	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	206	I32 i = AvFILLp (padlist);
143	if (namesv && namesv != &PL_sv_undef)	207	while (i >= 0)
144	{	208	{
145	char *name = SvPVX (namesv); /* XXX */	209	SV **svp = av_fetch (padlist, i--, FALSE);
146	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	210	if (svp)
147	{ /* lexical from outside? */
148	npad[ix] = SvREFCNT_inc (ppad[ix]);
149	}	211	{
150	else
151	{ /* our own lexical */
152	SV *sv;	212	SV *sv;
153	if (*name == '&')	213	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
154	sv = SvREFCNT_inc (ppad[ix]);	214	SvREFCNT_dec (sv);
155	else if (*name == '@')	215
156	sv = (SV *) newAV ();	216	SvREFCNT_dec (*svp);
157	else if (*name == '%')
158	sv = (SV *) newHV ();
159	else
160	sv = NEWSV (0, 0);
161	if (!SvPADBUSY (sv))
162	SvPADMY_on (sv);
163	npad[ix] = sv;
164	}	217	}
165	}	218	}
166	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	219
167	{	220	SvREFCNT_dec ((SV*)padlist);
168	npad[ix] = SvREFCNT_inc (ppad[ix]);
169	}
170	else
171	{
172	SV *sv = NEWSV (0, 0);
173	SvPADTMP_on (sv);
174	npad[ix] = sv;
175	}
176	}	221	}
		222	}
177		223
178	#if 0 /* return -ENOTUNDERSTOOD */	224	static int
179	/* Now that vars are all in place, clone nested closures. */	225	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		226	{
		227	AV *padlist;
		228	AV *av = (AV *)mg->mg_obj;
180		229
181	for (ix = fpad; ix > 0; ix--) {	230	/* casting is fun. */
182	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	231	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
183	if (namesv	232	free_padlist (padlist);
184	&& namesv != &PL_sv_undef	233
185	&& !(SvFLAGS(namesv) & SVf_FAKE)	234	SvREFCNT_dec (av);
186	&& *SvPVX(namesv) == '&'	235
187	&& CvCLONE(ppad[ix]))	236	return 0;
188	{	237	}
189	CV *kid = cv_clone((CV*)ppad[ix]);	238
190	SvREFCNT_dec(ppad[ix]);	239	#define PERL_MAGIC_coro PERL_MAGIC_ext
191	CvCLONE_on(kid);	240
192	SvPADMY_on(kid);	241	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
193	npad[ix] = (SV*)kid;	242
194	}	243	/* the next two functions merely cache the padlists */
		244	static void
		245	get_padlist (CV *cv)
		246	{
		247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		248
		249	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
		250	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
		251	else
		252	{
		253	#if 0
		254	/* this is probably cleaner, but also slower? */
		255	CV *cp = Perl_cv_clone (cv);
		256	CvPADLIST (cv) = CvPADLIST (cp);
		257	CvPADLIST (cp) = 0;
		258	SvREFCNT_dec (cp);
		259	#else
		260	CvPADLIST (cv) = coro_clone_padlist (cv);
		261	#endif
		262	}
		263	}
		264
		265	static void
		266	put_padlist (CV *cv)
		267	{
		268	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		269
		270	if (!mg)
		271	{
		272	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		273	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		274	mg->mg_virtual = &vtbl_coro;
		275	mg->mg_obj = (SV *)newAV ();
195	}	276	}
196	#endif
197		277
198	return newpadlist;
199	}
200
201	#ifdef MAY_FLUSH
202	STATIC void
203	free_padlist (AV *padlist)
204	{
205	/* may be during global destruction */
206	if (SvREFCNT(padlist))
207	{
208	I32 i = AvFILLp(padlist);
209	while (i >= 0)
210	{
211	SV **svp = av_fetch(padlist, i--, FALSE);
212	SV *sv = svp ? *svp : Nullsv;
213	if (sv)
214	SvREFCNT_dec(sv);
215	}
216
217	SvREFCNT_dec((SV*)padlist);
218	}
219	}
220	#endif
221
222	/* the next two functions merely cache the padlists */
223	STATIC void
224	get_padlist (CV *cv)
225	{
226	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
227
228	if (he && AvFILLp ((AV *)*he) >= 0)
229	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
230	else
231	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
232	}
233
234	STATIC void
235	put_padlist (CV *cv)
236	{
237	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
238
239	if (SvTYPE (*he) != SVt_PVAV)
240	{
241	SvREFCNT_dec (*he);
242	*he = (SV *)newAV ();
243	}
244
245	av_push ((AV *)*he, (SV *)CvPADLIST (cv));	278	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
246	}	279	}
247
248	#ifdef MAY_FLUSH
249	STATIC void
250	flush_padlist_cache ()
251	{
252	HV *hv = padlist_cache;
253	padlist_cache = newHV ();
254
255	if (hv_iterinit (hv))
256	{
257	HE *he;
258	AV *padlist;
259
260	while (!!(he = hv_iternext (hv)))
261	{
262	AV *av = (AV *)HeVAL(he);
263
264	/* casting is fun. */
265	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
266	free_padlist (padlist);
267	}
268	}
269
270	SvREFCNT_dec (hv);
271	}
272	#endif
273		280
274	#define SB do {	281	#define SB do {
275	#define SE } while (0)	282	#define SE } while (0)
276		283
277	#define LOAD(state) load_state(aTHX_ (state));	284	#define LOAD(state) load_state((state));
278	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	285	#define SAVE(state,flags) save_state((state),(flags));
279		286
280	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	287	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
281		288
282	static void	289	static void
283	load_state(pTHX_ Coro__State c)	290	load_state(Coro__State c)
284	{	291	{
285	PL_dowarn = c->dowarn;	292	PL_dowarn = c->dowarn;
286	PL_in_eval = c->in_eval;	293	PL_in_eval = c->in_eval;
287		294
288	PL_curstackinfo = c->curstackinfo;	295	PL_curstackinfo = c->curstackinfo;
289	PL_curstack = c->curstack;	296	PL_curstack = c->curstack;
290	PL_mainstack = c->mainstack;	297	PL_mainstack = c->mainstack;
291	PL_stack_sp = c->stack_sp;	298	PL_stack_sp = c->stack_sp;
292	PL_op = c->op;	299	PL_op = c->op;
293	PL_curpad = c->curpad;	300	PL_curpad = c->curpad;
		301	PL_comppad = c->comppad;
		302	PL_compcv = c->compcv;
294	PL_stack_base = c->stack_base;	303	PL_stack_base = c->stack_base;
295	PL_stack_max = c->stack_max;	304	PL_stack_max = c->stack_max;
296	PL_tmps_stack = c->tmps_stack;	305	PL_tmps_stack = c->tmps_stack;
297	PL_tmps_floor = c->tmps_floor;	306	PL_tmps_floor = c->tmps_floor;
298	PL_tmps_ix = c->tmps_ix;	307	PL_tmps_ix = c->tmps_ix;
…		…
304	PL_scopestack_ix = c->scopestack_ix;	313	PL_scopestack_ix = c->scopestack_ix;
305	PL_scopestack_max = c->scopestack_max;	314	PL_scopestack_max = c->scopestack_max;
306	PL_savestack = c->savestack;	315	PL_savestack = c->savestack;
307	PL_savestack_ix = c->savestack_ix;	316	PL_savestack_ix = c->savestack_ix;
308	PL_savestack_max = c->savestack_max;	317	PL_savestack_max = c->savestack_max;
		318	#if !PERL_VERSION_ATLEAST (5,9,0)
309	PL_retstack = c->retstack;	319	PL_retstack = c->retstack;
310	PL_retstack_ix = c->retstack_ix;	320	PL_retstack_ix = c->retstack_ix;
311	PL_retstack_max = c->retstack_max;	321	PL_retstack_max = c->retstack_max;
		322	#endif
		323	PL_curpm = c->curpm;
312	PL_curcop = c->curcop;	324	PL_curcop = c->curcop;
313	PL_top_env = c->top_env;
314		325
315	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	326	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
316	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	327	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
317	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	328	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
318		329
…		…
327		338
328	if (padlist)	339	if (padlist)
329	{	340	{
330	put_padlist (cv); /* mark this padlist as available */	341	put_padlist (cv); /* mark this padlist as available */
331	CvPADLIST(cv) = padlist;	342	CvPADLIST(cv) = padlist;
332	#ifdef USE_THREADS
333	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
334	#endif
335	}	343	}
336		344
337	++CvDEPTH(cv);	345	++CvDEPTH(cv);
338	}	346	}
339		347
340	PUTBACK;	348	PUTBACK;
341	}	349	}
342	}	350	}
343		351
344	static void	352	static void
345	save_state(pTHX_ Coro__State c, int flags)	353	save_state(Coro__State c, int flags)
346	{	354	{
347	{	355	{
348	dSP;	356	dSP;
349	I32 cxix = cxstack_ix;	357	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	358	PERL_CONTEXT *ccstk = cxstack;
…		…
366	if (CxTYPE(cx) == CXt_SUB)	374	if (CxTYPE(cx) == CXt_SUB)
367	{	375	{
368	CV *cv = cx->blk_sub.cv;	376	CV *cv = cx->blk_sub.cv;
369	if (CvDEPTH(cv))	377	if (CvDEPTH(cv))
370	{	378	{
371	#ifdef USE_THREADS
372	/*XPUSHs ((SV *)CvOWNER(cv));*/
373	/*CvOWNER(cv) = 0;*/
374	/*error must unlock this cv etc.. etc...*/
375	#endif
376	EXTEND (SP, CvDEPTH(cv)*2);	379	EXTEND (SP, CvDEPTH(cv)*2);
377		380
378	while (--CvDEPTH(cv))	381	while (--CvDEPTH(cv))
379	{	382	{
380	/* this tells the restore code to increment CvDEPTH */	383	/* this tells the restore code to increment CvDEPTH */
…		…
383	}	386	}
384		387
385	PUSHs ((SV *)CvPADLIST(cv));	388	PUSHs ((SV *)CvPADLIST(cv));
386	PUSHs ((SV *)cv);	389	PUSHs ((SV *)cv);
387		390
388	get_padlist (cv); /* this is a monster */	391	get_padlist (cv);
389	}	392	}
390	}	393	}
		394	#ifdef CXt_FORMAT
391	else if (CxTYPE(cx) == CXt_FORMAT)	395	else if (CxTYPE(cx) == CXt_FORMAT)
392	{	396	{
393	/* I never used formats, so how should I know how these are implemented? */	397	/* I never used formats, so how should I know how these are implemented? */
394	/* my bold guess is as a simple, plain sub... */	398	/* my bold guess is as a simple, plain sub... */
395	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	399	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
396	}	400	}
		401	#endif
397	}	402	}
398		403
399	if (top_si->si_type == PERLSI_MAIN)	404	if (top_si->si_type == PERLSI_MAIN)
400	break;	405	break;
401		406
…		…
418	c->curstack = PL_curstack;	423	c->curstack = PL_curstack;
419	c->mainstack = PL_mainstack;	424	c->mainstack = PL_mainstack;
420	c->stack_sp = PL_stack_sp;	425	c->stack_sp = PL_stack_sp;
421	c->op = PL_op;	426	c->op = PL_op;
422	c->curpad = PL_curpad;	427	c->curpad = PL_curpad;
		428	c->comppad = PL_comppad;
		429	c->compcv = PL_compcv;
423	c->stack_base = PL_stack_base;	430	c->stack_base = PL_stack_base;
424	c->stack_max = PL_stack_max;	431	c->stack_max = PL_stack_max;
425	c->tmps_stack = PL_tmps_stack;	432	c->tmps_stack = PL_tmps_stack;
426	c->tmps_floor = PL_tmps_floor;	433	c->tmps_floor = PL_tmps_floor;
427	c->tmps_ix = PL_tmps_ix;	434	c->tmps_ix = PL_tmps_ix;
…		…
433	c->scopestack_ix = PL_scopestack_ix;	440	c->scopestack_ix = PL_scopestack_ix;
434	c->scopestack_max = PL_scopestack_max;	441	c->scopestack_max = PL_scopestack_max;
435	c->savestack = PL_savestack;	442	c->savestack = PL_savestack;
436	c->savestack_ix = PL_savestack_ix;	443	c->savestack_ix = PL_savestack_ix;
437	c->savestack_max = PL_savestack_max;	444	c->savestack_max = PL_savestack_max;
		445	#if !PERL_VERSION_ATLEAST (5,9,0)
438	c->retstack = PL_retstack;	446	c->retstack = PL_retstack;
439	c->retstack_ix = PL_retstack_ix;	447	c->retstack_ix = PL_retstack_ix;
440	c->retstack_max = PL_retstack_max;	448	c->retstack_max = PL_retstack_max;
		449	#endif
		450	c->curpm = PL_curpm;
441	c->curcop = PL_curcop;	451	c->curcop = PL_curcop;
442	c->top_env = PL_top_env;
443	}	452	}
444		453
445	/*	454	/*
446	* allocate various perl stacks. This is an exact copy	455	* allocate various perl stacks. This is an exact copy
447	* of perl.c:init_stacks, except that it uses less memory	456	* of perl.c:init_stacks, except that it uses less memory
448	* on the assumption that coroutines do not usually need	457	* on the (sometimes correct) assumption that coroutines do
449	* a lot of stackspace.	458	* not usually need a lot of stackspace.
450	*/	459	*/
451	STATIC void	460	static void
452	coro_init_stacks (pTHX)	461	coro_init_stacks ()
453	{	462	{
454	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	463	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
455	PL_curstackinfo->si_type = PERLSI_MAIN;	464	PL_curstackinfo->si_type = PERLSI_MAIN;
456	PL_curstack = PL_curstackinfo->si_stack;	465	PL_curstack = PL_curstackinfo->si_stack;
457	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	466	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
467		476
468	New(54,PL_markstack,16,I32);	477	New(54,PL_markstack,16,I32);
469	PL_markstack_ptr = PL_markstack;	478	PL_markstack_ptr = PL_markstack;
470	PL_markstack_max = PL_markstack + 16;	479	PL_markstack_max = PL_markstack + 16;
471		480
		481	#ifdef SET_MARK_OFFSET
472	SET_MARK_OFFSET;	482	SET_MARK_OFFSET;
		483	#endif
473		484
474	New(54,PL_scopestack,16,I32);	485	New(54,PL_scopestack,16,I32);
475	PL_scopestack_ix = 0;	486	PL_scopestack_ix = 0;
476	PL_scopestack_max = 16;	487	PL_scopestack_max = 16;
477		488
478	New(54,PL_savestack,96,ANY);	489	New(54,PL_savestack,96,ANY);
479	PL_savestack_ix = 0;	490	PL_savestack_ix = 0;
480	PL_savestack_max = 96;	491	PL_savestack_max = 96;
481		492
		493	#if !PERL_VERSION_ATLEAST (5,9,0)
482	New(54,PL_retstack,8,OP*);	494	New(54,PL_retstack,8,OP*);
483	PL_retstack_ix = 0;	495	PL_retstack_ix = 0;
484	PL_retstack_max = 8;	496	PL_retstack_max = 8;
		497	#endif
485	}	498	}
486		499
487	/*	500	/*
488	* destroy the stacks, the callchain etc...	501	* destroy the stacks, the callchain etc...
489	* still there is a memleak of 128 bytes...
490	*/	502	*/
491	STATIC void	503	static void
492	destroy_stacks(pTHX)	504	coro_destroy_stacks()
493	{	505	{
494	if (!IN_DESTRUCT)	506	if (!IN_DESTRUCT)
495	{	507	{
496	/* is this ugly, I ask? */	508	/* is this ugly, I ask? */
497	while (PL_scopestack_ix)	509	LEAVE_SCOPE (0);
498	LEAVE;
499		510
500	/* sure it is, but more important: is it correct?? :/ */	511	/* sure it is, but more important: is it correct?? :/ */
501	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
502	FREETMPS;	512	FREETMPS;
		513
		514	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
503	}	515	}
504		516
505	while (PL_curstackinfo->si_next)	517	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	518	PL_curstackinfo = PL_curstackinfo->si_next;
507		519
508	while (PL_curstackinfo)	520	while (PL_curstackinfo)
509	{	521	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	522	PERL_SI *p = PL_curstackinfo->si_prev;
511		523
512	{	524	{ /*D*//*remove*/
513	dSP;	525	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	526	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */	527	PUTBACK; /* possibly superfluous */
516	}	528	}
517		529
518	if (!IN_DESTRUCT)	530	if (!IN_DESTRUCT)
519	{	531	{
520	dounwind(-1);	532	dounwind (-1);/*D*//*remove*/
521	SvREFCNT_dec(PL_curstackinfo->si_stack);	533	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}	534	}
523		535
524	Safefree(PL_curstackinfo->si_cxstack);	536	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree(PL_curstackinfo);	537	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	538	PL_curstackinfo = p;
527	}	539	}
528		540
529	Safefree(PL_tmps_stack);	541	Safefree (PL_tmps_stack);
530	Safefree(PL_markstack);	542	Safefree (PL_markstack);
531	Safefree(PL_scopestack);	543	Safefree (PL_scopestack);
532	Safefree(PL_savestack);	544	Safefree (PL_savestack);
		545	#if !PERL_VERSION_ATLEAST (5,9,0)
533	Safefree(PL_retstack);	546	Safefree (PL_retstack);
534	}
535
536	static void
537	allocate_stack (Coro__State ctx, int alloc)
538	{
539	coro_stack *stack;
540
541	New (0, stack, 1, coro_stack);
542
543	stack->refcnt = 1;
544	stack->usecnt = 1;
545	stack->gencnt = ctx->gencnt = 0;
546	if (alloc)
547	{
548	#ifdef HAVE_MMAP
549	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
551	if (stack->sptr == (void *)-1)
552	#endif	547	#endif
553	{
554	/*FIXME*//*D*//* reasonable stack size! */
555	stack->ssize = -4096 * sizeof (long);
556	New (0, stack->sptr, 4096, long);
557	}
558	}
559	else
560	stack->sptr = 0;
561
562	ctx->stack = stack;
563	}	548	}
564		549
565	static void	550	static void
566	deallocate_stack (Coro__State ctx)	551	setup_coro (struct coro *coro)
567	{
568	coro_stack *stack = ctx->stack;
569
570	ctx->stack = 0;
571
572	if (stack)
573	{
574	if (!--stack->refcnt)
575	{
576	#ifdef HAVE_MMAP
577	if (stack->ssize > 0 && stack->sptr)
578	munmap (stack->sptr, stack->ssize);
579	else
580	#else
581	Safefree (stack->sptr);
582	#endif
583	Safefree (stack);
584	}
585	else if (ctx->gencnt == stack->gencnt)
586	--stack->usecnt;
587	}
588	}
589
590	static void
591	setup_coro (void *arg)
592	{	552	{
593	/*	553	/*
594	* emulate part of the perl startup here.	554	* emulate part of the perl startup here.
595	*/	555	*/
		556
		557	coro_init_stacks ();
		558
		559	PL_curcop = 0;
		560	PL_in_eval = 0;
		561	PL_curpm = 0;
		562
		563	{
		564	dSP;
		565	LOGOP myop;
		566
		567	/* I have no idea why this is needed, but it is */
		568	PUSHMARK (SP);
		569
		570	SvREFCNT_dec (GvAV (PL_defgv));
		571	GvAV (PL_defgv) = coro->args; coro->args = 0;
		572
		573	Zero (&myop, 1, LOGOP);
		574	myop.op_next = Nullop;
		575	myop.op_flags = OPf_WANT_VOID;
		576
		577	PL_op = (OP *)&myop;
		578
		579	PUSHMARK (SP);
		580	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
		581	PUTBACK;
		582	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		583	SPAGAIN;
		584
		585	ENTER; /* necessary e.g. for dounwind */
		586	}
		587	}
		588
		589	static void
		590	free_coro_mortal ()
		591	{
		592	if (coro_mortal)
		593	{
		594	SvREFCNT_dec (coro_mortal);
		595	coro_mortal = 0;
		596	}
		597	}
		598
		599	static void NOINLINE
		600	prepare_cctx (coro_stack *cctx)
		601	{
596	dSP;	602	dSP;
597	Coro__State ctx = (Coro__State)arg;	603	LOGOP myop;
598	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
599		604
600	coro_init_stacks (aTHX);	605	Zero (&myop, 1, LOGOP);
601	/*PL_curcop = 0;*/	606	myop.op_next = PL_op;
602	/*PL_in_eval = PL_in_eval;*/ /* inherit */	607	myop.op_flags = OPf_WANT_VOID;
603	SvREFCNT_dec (GvAV (PL_defgv));
604	GvAV (PL_defgv) = ctx->args;
605		608
		609	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
		610
		611	PUSHMARK (SP);
		612	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
		613	PUTBACK;
		614	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
606	SPAGAIN;	615	SPAGAIN;
607
608	if (ctx->stack)
609	{
610	ctx->cursp = 0;
611
612	PUSHMARK(SP);
613	PUTBACK;
614	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
615
616	if (SvTRUE (ERRSV))
617	croak (NULL);
618	else
619	croak ("FATAL: CCTXT coroutine returned!");
620	}
621	else
622	{
623	UNOP myop;
624
625	PL_op = (OP *)&myop;
626
627	Zero(&myop, 1, UNOP);
628	myop.op_next = Nullop;
629	myop.op_flags = OPf_WANT_VOID;
630
631	PUSHMARK(SP);
632	XPUSHs (sub_init);
633	/*
634	* the next line is slightly wrong, as PL_op->op_next
635	* is actually being executed so we skip the first op.
636	* that doesn't matter, though, since it is only
637	* pp_nextstate and we never return...
638	* ah yes, and I don't care anyways ;)
639	*/
640	PUTBACK;
641	PL_op = pp_entersub();
642	SPAGAIN;
643
644	ENTER; /* necessary e.g. for dounwind */
645	}
646	}	616	}
647		617
648	static void	618	static void
649	continue_coro (void *arg)	619	coro_run (void *arg)
650	{	620	{
		621	/* coro_run is the alternative epilogue of transfer() */
		622	UNLOCK;
		623
651	/*	624	/*
652	* this is a _very_ stripped down perl interpreter ;)	625	* this is a _very_ stripped down perl interpreter ;)
653	*/	626	*/
654	Coro__State ctx = (Coro__State)arg;
655	JMPENV coro_start_env;
656
657	/* same as JMPENV_BOOTSTRAP */
658	Zero(&coro_start_env, 1, JMPENV);
659	coro_start_env.je_ret = -1;
660	coro_start_env.je_mustcatch = TRUE;
661	PL_top_env = &coro_start_env;	627	PL_top_env = &PL_start_env;
		628	/* inject call to cctx_init */
		629	prepare_cctx ((coro_stack *)arg);
662		630
663	ctx->cursp = 0;	631	/* somebody will hit me for both perl_run and PL_restartop */
664	PL_op = PL_op->op_next;	632	perl_run (PL_curinterp);
665	CALLRUNOPS(aTHX);
666		633
		634	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
667	abort ();	635	abort ();
668	}	636	}
669		637
670	STATIC void	638	static coro_stack *
		639	stack_new ()
		640	{
		641	coro_stack *stack;
		642
		643	New (0, stack, 1, coro_stack);
		644
		645	#if HAVE_MMAP
		646
		647	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		648	/* mmap suppsedly does allocate-on-write for us */
		649	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		650
		651	if (stack->sptr == (void *)-1)
		652	{
		653	perror ("FATAL: unable to mmap stack for coroutine");
		654	_exit (EXIT_FAILURE);
		655	}
		656
		657	# if STACKGUARD
		658	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		659	# endif
		660
		661	#else
		662
		663	stack->ssize = STACKSIZE * (long)sizeof (long);
		664	New (0, stack->sptr, STACKSIZE, long);
		665
		666	if (!stack->sptr)
		667	{
		668	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		669	_exit (EXIT_FAILURE);
		670	}
		671
		672	#endif
		673
		674	#if USE_VALGRIND
		675	stack->valgrind_id = VALGRIND_STACK_REGISTER (
		676	STACKGUARD * PAGESIZE + (char *)stack->sptr,
		677	stack->ssize + (char *)stack->sptr
		678	);
		679	#endif
		680
		681	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		682
		683	return stack;
		684	}
		685
		686	static void
		687	stack_free (coro_stack *stack)
		688	{
		689	if (!stack)
		690	return;
		691
		692	#if USE_VALGRIND
		693	VALGRIND_STACK_DEREGISTER (stack->valgrind_id);
		694	#endif
		695
		696	#if HAVE_MMAP
		697	munmap (stack->sptr, stack->ssize);
		698	#else
		699	Safefree (stack->sptr);
		700	#endif
		701
		702	Safefree (stack);
		703	}
		704
		705	static coro_stack *stack_first;
		706	static int cctx_count, cctx_idle;
		707
		708	static coro_stack *
		709	stack_get ()
		710	{
		711	coro_stack *stack;
		712
		713	if (stack_first)
		714	{
		715	--cctx_idle;
		716	stack = stack_first;
		717	stack_first = stack->next;
		718	}
		719	else
		720	{
		721	++cctx_count;
		722	stack = stack_new ();
		723	PL_op = PL_op->op_next;
		724	}
		725
		726	return stack;
		727	}
		728
		729	static void
		730	stack_put (coro_stack *stack)
		731	{
		732	++cctx_idle;
		733	stack->next = stack_first;
		734	stack_first = stack;
		735	}
		736
		737	/* never call directly, always through the coro_state_transfer global variable */
		738	static void NOINLINE
671	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	739	transfer (struct coro *prev, struct coro *next, int flags)
672	{	740	{
673	dSTACKLEVEL;	741	dSTACKLEVEL;
674	static struct coro *xnext;
675		742
		743	/* sometimes transfer is only called to set idle_sp */
		744	if (flags == TRANSFER_SET_STACKLEVEL)
		745	((coro_stack *)prev)->idle_sp = STACKLEVEL;
676	if (prev != next)	746	else if (prev != next)
677	{	747	{
678	xnext = next;	748	coro_stack *prev__stack;
		749
		750	LOCK;
679		751
680	if (next->mainstack)	752	if (next->mainstack)
681	{	753	{
		754	/* coroutine already started */
682	SAVE (prev, flags);	755	SAVE (prev, flags);
683	LOAD (next);	756	LOAD (next);
684
685	/* mark this state as in-use */
686	next->mainstack = 0;
687	next->tmps_ix = -2;
688
689	/* stacklevel changed? if yes, grab the stack for us! */
690	if (flags & TRANSFER_SAVE_CCTXT)
691	{
692	if (!prev->stack)
693	allocate_stack (prev, 0);
694	else if (prev->cursp != stacklevel
695	&& prev->stack->usecnt > 1)
696	{
697	prev->gencnt = ++prev->stack->gencnt;
698	prev->stack->usecnt = 1;
699	}
700
701	/* has our stack been invalidated? */
702	if (next->stack && next->stack->gencnt != next->gencnt)
703	{
704	deallocate_stack (next);
705	allocate_stack (next, 1);
706	coro_create (&(next->stack->cctx),
707	continue_coro, (void *)next,
708	next->stack->sptr, labs (next->stack->ssize));
709	}
710
711	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712	/* don't add any code here */
713	}
714
715	}	757	}
716	else if (next->tmps_ix == -2)
717	croak ("tried to transfer to running coroutine");
718	else	758	else
719	{	759	{
		760	/* need to start coroutine */
720	SAVE (prev, -1); /* first get rid of the old state */	761	/* first get rid of the old state */
721		762	SAVE (prev, -1);
722	if (flags & TRANSFER_SAVE_CCTXT)	763	/* setup coroutine call */
723	{
724	if (!prev->stack)
725	allocate_stack (prev, 0);
726
727	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
728	{
729	setup_coro (next);
730
731	prev->stack->refcnt++;
732	prev->stack->usecnt++;
733	next->stack = prev->stack;
734	next->gencnt = prev->gencnt;
735	}
736	else
737	{
738	allocate_stack (next, 1);
739	coro_create (&(next->stack->cctx),
740	setup_coro, (void *)next,
741	next->stack->sptr, labs (next->stack->ssize));
742	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743	/* don't add any code here */
744	}
745	}
746	else
747	setup_coro (next);	764	setup_coro (next);
		765	/* need a stack */
		766	next->stack = 0;
748	}	767	}
749		768
750	/*	769	if (!prev->stack)
751	* xnext is now either prev or next, depending on wether	770	/* create a new empty context */
752	* we switched the c stack or not. that's why i use a global	771	Newz (0, prev->stack, 1, coro_stack);
753	* variable, that should become thread-specific at one point.	772
		773	prev__stack = prev->stack;
		774
		775	/* possibly "free" the stack */
		776	if (prev__stack->idle_sp == STACKLEVEL)
754	*/	777	{
755	xnext->cursp = stacklevel;	778	stack_put (prev__stack);
		779	prev->stack = 0;
		780	}
		781
		782	if (!next->stack)
		783	next->stack = stack_get ();
		784
		785	if (prev__stack != next->stack)
		786	{
		787	prev__stack->top_env = PL_top_env;
		788	PL_top_env = next->stack->top_env;
		789	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		790	}
		791
		792	free_coro_mortal ();
		793
		794	UNLOCK;
756	}	795	}
757	}	796	}
758		797
		798	struct transfer_args
		799	{
		800	struct coro *prev, *next;
		801	int flags;
		802	};
		803
		804	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		805
		806	static void
		807	coro_state_destroy (struct coro *coro)
		808	{
		809	if (coro->refcnt--)
		810	return;
		811
		812	if (coro->mainstack && coro->mainstack != main_mainstack)
		813	{
		814	struct coro temp;
		815
		816	SAVE ((&temp), TRANSFER_SAVE_ALL);
		817	LOAD (coro);
		818
		819	coro_destroy_stacks ();
		820
		821	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		822
		823	coro->mainstack = 0;
		824	}
		825
		826	stack_free (coro->stack);
		827	SvREFCNT_dec (coro->args);
		828	Safefree (coro);
		829	}
		830
		831	static int
		832	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		833	{
		834	struct coro *coro = (struct coro *)mg->mg_ptr;
		835	mg->mg_ptr = 0;
		836
		837	coro_state_destroy (coro);
		838
		839	return 0;
		840	}
		841
		842	static int
		843	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		844	{
		845	struct coro *coro = (struct coro *)mg->mg_ptr;
		846
		847	++coro->refcnt;
		848
		849	return 0;
		850	}
		851
		852	static MGVTBL coro_state_vtbl = {
		853	0, 0, 0, 0,
		854	coro_state_clear,
		855	0,
		856	#ifdef MGf_DUP
		857	coro_state_dup,
		858	#else
		859	# define MGf_DUP 0
		860	#endif
		861	};
		862
759	static struct coro *	863	static struct coro *
760	sv_to_coro (SV *arg, const char *funcname, const char *varname)	864	SvSTATE (SV *coro)
761	{	865	{
762	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	866	HV *stash;
		867	MAGIC *mg;
		868
		869	if (SvROK (coro))
		870	coro = SvRV (coro);
		871
		872	stash = SvSTASH (coro);
		873	if (stash != coro_stash && stash != coro_state_stash)
763	{	874	{
764	HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);	875	/* very slow, but rare, check */
765		876	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
766	if (!he)	877	croak ("Coro::State object required");
767	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
768
769	arg = HeVAL(he);
770	}	878	}
771
772	/* must also be changed inside Coro::Cont::yield */
773	if (SvROK(arg) && SvOBJECT(SvRV(arg))
774	&& SvSTASH(SvRV(arg)) == coro_state_stash)
775	return (struct coro *) SvIV((SV*)SvRV(arg));
776		879
777	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	880	mg = SvMAGIC (coro);
778	/*NORETURN*/	881	assert (mg->mg_type == PERL_MAGIC_ext);
		882	return (struct coro *)mg->mg_ptr;
779	}	883	}
780		884
781	static void	885	static void
		886	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		887	{
		888	ta->prev = SvSTATE (prev);
		889	ta->next = SvSTATE (next);
		890	ta->flags = flags;
		891	}
		892
		893	static void
782	api_transfer(pTHX_ SV *prev, SV *next, int flags)	894	api_transfer (SV *prev, SV *next, int flags)
783	{	895	{
784	transfer(aTHX_	896	dTHX;
785	sv_to_coro (prev, "Coro::transfer", "prev"),	897	struct transfer_args ta;
786	sv_to_coro (next, "Coro::transfer", "next"),	898
787	flags);	899	prepare_transfer (&ta, prev, next, flags);
		900	TRANSFER (ta);
788	}	901	}
789		902
790	/** Coro ********************************************************************/	903	/** Coro ********************************************************************/
791		904
792	#define PRIO_MAX 3	905	#define PRIO_MAX 3
…		…
796	#define PRIO_IDLE -3	909	#define PRIO_IDLE -3
797	#define PRIO_MIN -4	910	#define PRIO_MIN -4
798		911
799	/* for Coro.pm */	912	/* for Coro.pm */
800	static GV *coro_current, *coro_idle;	913	static GV *coro_current, *coro_idle;
801	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	914	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
802	static int coro_nready;	915	static int coro_nready;
803		916
804	static void	917	static void
805	coro_enq (SV *sv)	918	coro_enq (SV *sv)
806	{	919	{
807	if (SvROK (sv))	920	int prio;
808	{	921
809	SV *hv = SvRV (sv);
810	if (SvTYPE (hv) == SVt_PVHV)	922	if (SvTYPE (sv) != SVt_PVHV)
811	{
812	SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0);
813	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
814
815	prio = prio > PRIO_MAX ? PRIO_MAX
816	: prio < PRIO_MIN ? PRIO_MIN
817	: prio;
818
819	av_push (coro_ready [prio - PRIO_MIN], sv);
820	coro_nready++;
821
822	return;
823	}
824	}
825
826	croak ("Coro::ready tried to enqueue something that is not a coroutine");	923	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		924
		925	prio = SvSTATE (sv)->prio;
		926
		927	av_push (coro_ready [prio - PRIO_MIN], sv);
		928	coro_nready++;
827	}	929	}
828		930
829	static SV *	931	static SV *
830	coro_deq (int min_prio)	932	coro_deq (int min_prio)
831	{	933	{
…		…
834	min_prio -= PRIO_MIN;	936	min_prio -= PRIO_MIN;
835	if (min_prio < 0)	937	if (min_prio < 0)
836	min_prio = 0;	938	min_prio = 0;
837		939
838	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	940	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
839	if (av_len (coro_ready[prio]) >= 0)	941	if (AvFILLp (coro_ready [prio]) >= 0)
840	{	942	{
841	coro_nready--;	943	coro_nready--;
842	return av_shift (coro_ready[prio]);	944	return av_shift (coro_ready [prio]);
843	}	945	}
844		946
845	return 0;	947	return 0;
846	}	948	}
847		949
848	static void	950	static void
849	api_ready (SV *coro)	951	api_ready (SV *coro)
850	{	952	{
		953	dTHX;
		954
		955	if (SvROK (coro))
		956	coro = SvRV (coro);
		957
		958	LOCK;
851	coro_enq (SvREFCNT_inc (coro));	959	coro_enq (SvREFCNT_inc (coro));
		960	UNLOCK;
852	}	961	}
853		962
854	static void	963	static void
855	api_schedule (int cede)	964	prepare_schedule (struct transfer_args *ta)
856	{	965	{
857	SV *prev, *next;	966	SV *current, *prev, *next;
858		967
859	prev = GvSV (coro_current);	968	current = GvSV (coro_current);
860		969
861	if (cede)	970	for (;;)
862	coro_enq (SvREFCNT_inc (prev));	971	{
863		972	LOCK;
864	next = coro_deq (PRIO_MIN);	973	next = coro_deq (PRIO_MIN);
		974	UNLOCK;
865		975
866	if (!next)	976	if (next)
867	next = SvREFCNT_inc (GvSV (coro_idle));	977	break;
868		978
869	GvSV (coro_current) = SvREFCNT_inc (next);	979	{
870	transfer (aTHX_	980	dSP;
871	sv_to_coro (prev, "Coro::schedule", "current coroutine"),	981
872	sv_to_coro (next, "Coro::schedule", "next coroutine"),	982	ENTER;
873	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);	983	SAVETMPS;
874	SvREFCNT_dec (next);	984
875	SvREFCNT_dec (prev);	985	PUSHMARK (SP);
		986	PUTBACK;
		987	call_sv (GvSV (coro_idle), G_DISCARD);
		988
		989	FREETMPS;
		990	LEAVE;
		991	}
		992	}
		993
		994	prev = SvRV (current);
		995	SvRV (current) = next;
		996
		997	/* free this only after the transfer */
		998	LOCK;
		999	free_coro_mortal ();
		1000	UNLOCK;
		1001	coro_mortal = prev;
		1002
		1003	ta->prev = SvSTATE (prev);
		1004	ta->next = SvSTATE (next);
		1005	ta->flags = TRANSFER_SAVE_ALL;
		1006	}
		1007
		1008	static void
		1009	prepare_cede (struct transfer_args *ta)
		1010	{
		1011	LOCK;
		1012	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		1013	UNLOCK;
		1014
		1015	prepare_schedule (ta);
		1016	}
		1017
		1018	static void
		1019	api_schedule (void)
		1020	{
		1021	dTHX;
		1022	struct transfer_args ta;
		1023
		1024	prepare_schedule (&ta);
		1025	TRANSFER (ta);
		1026	}
		1027
		1028	static void
		1029	api_cede (void)
		1030	{
		1031	dTHX;
		1032	struct transfer_args ta;
		1033
		1034	prepare_cede (&ta);
		1035	TRANSFER (ta);
876	}	1036	}
877		1037
878	MODULE = Coro::State PACKAGE = Coro::State	1038	MODULE = Coro::State PACKAGE = Coro::State
879		1039
880	PROTOTYPES: ENABLE	1040	PROTOTYPES: DISABLE
881		1041
882	BOOT:	1042	BOOT:
883	{ /* {} necessary for stoopid perl-5.6.x */	1043	{
884	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1044	#ifdef USE_ITHREADS
885	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1045	MUTEX_INIT (&coro_mutex);
		1046	#endif
		1047	BOOT_PAGESIZE;
		1048
886	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1049	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887		1050
888	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1051	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
889	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1052	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
890	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1053	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
891	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
892
893	if (!padlist_cache)
894	padlist_cache = newHV ();
895		1054
896	main_mainstack = PL_mainstack;	1055	main_mainstack = PL_mainstack;
897		1056
898	coroapi.ver = CORO_API_VERSION;	1057	coroapi.ver = CORO_API_VERSION;
899	coroapi.transfer = api_transfer;	1058	coroapi.transfer = api_transfer;
900	}
901		1059
902	Coro::State	1060	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
903	_newprocess(args)	1061	}
904	SV * args	1062
905	PROTOTYPE: $	1063	SV *
		1064	new (char *klass, ...)
906	CODE:	1065	CODE:
907	Coro__State coro;	1066	{
		1067	struct coro *coro;
		1068	HV *hv;
		1069	int i;
908		1070
909	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
910	croak ("Coro::State::_newprocess expects an arrayref");
911
912	New (0, coro, 1, struct coro);	1071	Newz (0, coro, 1, struct coro);
		1072	coro->args = newAV ();
913		1073
914	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1074	hv = newHV ();
		1075	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1076	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1077
		1078	for (i = 1; i < items; i++)
		1079	av_push (coro->args, newSVsv (ST (i)));
		1080
915	coro->mainstack = 0; /* actual work is done inside transfer */	1081	/*coro->mainstack = 0; *//*actual work is done inside transfer */
916	coro->stack = 0;	1082	/*coro->stack = 0;*/
917		1083	}
918	RETVAL = coro;
919	OUTPUT:	1084	OUTPUT:
920	RETVAL	1085	RETVAL
921		1086
922	void	1087	void
923	transfer(prev, next, flags)	1088	_set_stacklevel (...)
924	Coro::State_or_hashref prev	1089	ALIAS:
925	Coro::State_or_hashref next	1090	Coro::State::transfer = 1
926	int flags	1091	Coro::schedule = 2
927	PROTOTYPE: @	1092	Coro::cede = 3
		1093	Coro::Cont::yield = 4
928	CODE:	1094	CODE:
929	PUTBACK;	1095	{
930	transfer (aTHX_ prev, next, flags);	1096	struct transfer_args ta;
931	SPAGAIN;	1097
		1098	switch (ix)
		1099	{
		1100	case 0:
		1101	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
		1102	ta.next = 0;
		1103	ta.flags = TRANSFER_SET_STACKLEVEL;
		1104	break;
		1105
		1106	case 1:
		1107	if (items != 3)
		1108	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1109
		1110	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1111	break;
		1112
		1113	case 2:
		1114	prepare_schedule (&ta);
		1115	break;
		1116
		1117	case 3:
		1118	prepare_cede (&ta);
		1119	break;
		1120
		1121	case 4:
		1122	{
		1123	SV *yieldstack;
		1124	SV *sv;
		1125	AV *defav = GvAV (PL_defgv);
		1126
		1127	yieldstack = *hv_fetch (
		1128	(HV *)SvRV (GvSV (coro_current)),
		1129	"yieldstack", sizeof ("yieldstack") - 1,
		1130	0
		1131	);
		1132
		1133	/* set up @_ -- ugly */
		1134	av_clear (defav);
		1135	av_fill (defav, items - 1);
		1136	while (items--)
		1137	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1138
		1139	sv = av_pop ((AV *)SvRV (yieldstack));
		1140	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1141	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1142	ta.flags = 0;
		1143	SvREFCNT_dec (sv);
		1144	}
		1145	break;
		1146
		1147	}
		1148
		1149	TRANSFER (ta);
		1150	}
932		1151
933	void	1152	void
934	DESTROY(coro)	1153	_clone_state_from (SV *dst, SV *src)
935	Coro::State coro	1154	CODE:
936	CODE:	1155	{
		1156	struct coro *coro_src = SvSTATE (src);
937		1157
938	if (coro->mainstack && coro->mainstack != main_mainstack)	1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
939	{
940	struct coro temp;
941		1159
942	PUTBACK;	1160	++coro_src->refcnt;
943	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1161	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
944	LOAD(aTHX_ coro);	1162	}
945	SPAGAIN;
946
947	destroy_stacks (aTHX);
948
949	LOAD((&temp)); /* this will get rid of defsv etc.. */
950	SPAGAIN;
951
952	coro->mainstack = 0;
953	}
954
955	deallocate_stack (coro);
956
957	Safefree (coro);
958		1163
959	void	1164	void
960	flush()
961	CODE:
962	#ifdef MAY_FLUSH
963	flush_padlist_cache ();
964	#endif
965
966	void
967	_exit(code)	1165	_exit (code)
968	int code	1166	int code
969	PROTOTYPE: $	1167	PROTOTYPE: $
970	CODE:	1168	CODE:
971	#if defined(__GLIBC__) || _POSIX_C_SOURCE
972	_exit (code);	1169	_exit (code);
973	#else
974	signal (SIGTERM, SIG_DFL);
975	raise (SIGTERM);
976	exit (code);
977	#endif
978
979	MODULE = Coro::State PACKAGE = Coro::Cont
980
981	# this is slightly dirty (should expose a c-level api)
982
983	void
984	yield(...)
985	PROTOTYPE: @
986	CODE:
987	static SV *returnstk;
988	SV *sv;
989	AV *defav = GvAV (PL_defgv);
990	struct coro *prev, *next;
991
992	if (!returnstk)
993	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
994
995	/* set up @_ -- ugly */
996	av_clear (defav);
997	av_fill (defav, items - 1);
998	while (items--)
999	av_store (defav, items, SvREFCNT_inc (ST(items)));
1000
1001	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1002	sv = av_pop ((AV *)SvRV (returnstk));
1003	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1004	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1005	SvREFCNT_dec (sv);
1006
1007	transfer(aTHX_ prev, next, 0);
1008		1170
1009	MODULE = Coro::State PACKAGE = Coro	1171	MODULE = Coro::State PACKAGE = Coro
1010		1172
1011	# this is slightly dirty (should expose a c-level api)
1012
1013	BOOT:	1173	BOOT:
1014	{	1174	{
1015	int i;	1175	int i;
		1176
1016	HV *stash = gv_stashpv ("Coro", TRUE);	1177	coro_stash = gv_stashpv ("Coro", TRUE);
1017		1178
1018	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1179	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1180	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1181	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1182	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1183	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1184	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1024		1185
1025	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1186	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1026	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1187	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1027		1188
1028	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1189	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1030		1191
1031	{	1192	{
1032	SV *sv = perl_get_sv("Coro::API", 1);	1193	SV *sv = perl_get_sv("Coro::API", 1);
1033		1194
1034	coroapi.schedule = api_schedule;	1195	coroapi.schedule = api_schedule;
		1196	coroapi.cede = api_cede;
1035	coroapi.ready = api_ready;	1197	coroapi.ready = api_ready;
1036	coroapi.nready = &coro_nready;	1198	coroapi.nready = &coro_nready;
1037	coroapi.current = coro_current;	1199	coroapi.current = coro_current;
1038		1200
1039	GCoroAPI = &coroapi;	1201	GCoroAPI = &coroapi;
1040	sv_setiv(sv, (IV)&coroapi);	1202	sv_setiv (sv, (IV)&coroapi);
1041	SvREADONLY_on(sv);	1203	SvREADONLY_on (sv);
1042	}	1204	}
1043	}	1205	}
1044		1206
		1207	int
		1208	prio (Coro::State coro, int newprio = 0)
		1209	ALIAS:
		1210	nice = 1
		1211	CODE:
		1212	{
		1213	RETVAL = coro->prio;
		1214
		1215	if (items > 1)
		1216	{
		1217	if (ix)
		1218	newprio += coro->prio;
		1219
		1220	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1221	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1222
		1223	coro->prio = newprio;
		1224	}
		1225	}
		1226
1045	void	1227	void
1046	ready(self)	1228	ready (SV *self)
1047	SV * self
1048	PROTOTYPE: $	1229	PROTOTYPE: $
1049	CODE:	1230	CODE:
1050	api_ready (self);	1231	api_ready (self);
1051		1232
1052	int	1233	int
1053	nready(...)	1234	nready (...)
1054	PROTOTYPE:	1235	PROTOTYPE:
1055	CODE:	1236	CODE:
1056	RETVAL = coro_nready;	1237	RETVAL = coro_nready;
1057	OUTPUT:	1238	OUTPUT:
1058	RETVAL	1239	RETVAL
1059		1240
		1241	MODULE = Coro::State PACKAGE = Coro::AIO
		1242
		1243	SV *
		1244	_get_state ()
		1245	CODE:
		1246	{
		1247	struct {
		1248	int errorno;
		1249	int laststype;
		1250	int laststatval;
		1251	Stat_t statcache;
		1252	} data;
		1253
		1254	data.errorno = errno;
		1255	data.laststype = PL_laststype;
		1256	data.laststatval = PL_laststatval;
		1257	data.statcache = PL_statcache;
		1258
		1259	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1260	}
		1261	OUTPUT:
		1262	RETVAL
		1263
1060	void	1264	void
1061	schedule(...)	1265	_set_state (char *data_)
1062	PROTOTYPE:	1266	PROTOTYPE: $
1063	ALIAS:
1064	cede = 1
1065	CODE:	1267	CODE:
1066	api_schedule (ix);	1268	{
		1269	struct {
		1270	int errorno;
		1271	int laststype;
		1272	int laststatval;
		1273	Stat_t statcache;
		1274	} *data = (void *)data_;
1067		1275
		1276	errno = data->errorno;
		1277	PL_laststype = data->laststype;
		1278	PL_laststatval = data->laststatval;
		1279	PL_statcache = data->statcache;
		1280	}

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