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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.22 by root, Sat Aug 11 23:10:56 2001 UTC vs.
Revision 1.104 by root, Mon Nov 27 01:51:02 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
		69	#endif
20		70
21	#define MAY_FLUSH /* increases codesize */	71	/* The next macro should declare a variable stacklevel that contains and approximation
		72	* to the current C stack pointer. Its property is that it changes with each call
		73	* and should be unique. */
		74	#define dSTACKLEVEL int stacklevel
		75	#define STACKLEVEL ((void *)&stacklevel)
22		76
23	/* perl-related */	77	#define IN_DESTRUCT (PL_main_cv == Nullcv)
24	#define TRANSFER_SAVE_DEFAV 0x00000001	78
25	#define TRANSFER_SAVE_DEFSV 0x00000002	79	#if __GNUC__ >= 3
26	#define TRANSFER_SAVE_ERRSV 0x00000004	80	# define attribute(x) __attribute__(x)
27	/* c-related */
28	#define TRANSFER_SAVE_CCTXT 0x00000008
29	#ifdef CORO_LAZY_STACK
30	# define TRANSFER_LAZY_STACK 0x00000010
31	#else	81	#else
32	# define TRANSFER_LAZY_STACK 0x00000000	82	# define attribute(x)
33	#endif	83	#endif
34		84
35	#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \	85	#define NOINLINE attribute ((noinline))
36	|TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT)
37		86
38	#define SUB_INIT "Coro::State::initialize"	87	#include "CoroAPI.h"
39	#define UCORO_STATE "_coro_state"
40		88
41	/* The next macro should delcare a variable stacklevel that contains and approximation	89	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
42	* to the current C stack pointer. It's property is that it changes with each call
43	* and should be unique. */
44	#define dSTACKLEVEL void *stacklevel = &stacklevel
45		90
46	#define labs(l) ((l) >= 0 ? (l) : -(l))	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
47		99
48	/* this is actually not only the c stack but also c registers etc... */	100	static struct CoroAPI coroapi;
49	typedef struct {	101	static AV *main_mainstack; /* used to differentiate between $main and others */
50	int refcnt; /* pointer reference counter */	102	static HV *coro_state_stash, *coro_stash;
51	int usecnt; /* shared by how many coroutines */	103	static SV *coro_mortal; /* will be freed after next transfer */
52	int gencnt; /* generation counter */
53		104
54	coro_context cctx;	105	/* this is a structure representing a c-level coroutine */
		106	typedef struct coro_stack {
		107	struct coro_stack *next;
55		108
		109	/* the stack */
56	void *sptr;	110	void *sptr;
57	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
58	} coro_stack;	121	} coro_stack;
59		122
		123	/* this is a structure representing a perl-level coroutine */
60	struct coro {	124	struct coro {
61	/* the optional C context */	125	/* the c coroutine allocated to this perl coroutine, if any */
62	coro_stack *stack;	126	coro_stack *stack;
63	void *cursp;	127
		128	/* data associated with this coroutine (initial args) */
		129	AV *args;
64	int gencnt;	130	int refcnt;
65		131
66	/* optionally saved, might be zero */	132	/* optionally saved, might be zero */
67	AV *defav;	133	AV *defav;
68	SV *defsv;	134	SV *defsv;
69	SV *errsv;	135	SV *errsv;
…		…
77	AV *curstack;	143	AV *curstack;
78	AV *mainstack;	144	AV *mainstack;
79	SV **stack_sp;	145	SV **stack_sp;
80	OP *op;	146	OP *op;
81	SV **curpad;	147	SV **curpad;
		148	AV *comppad;
		149	CV *compcv;
82	SV **stack_base;	150	SV **stack_base;
83	SV **stack_max;	151	SV **stack_max;
84	SV **tmps_stack;	152	SV **tmps_stack;
85	I32 tmps_floor;	153	I32 tmps_floor;
86	I32 tmps_ix;	154	I32 tmps_ix;
…		…
95	I32 savestack_ix;	163	I32 savestack_ix;
96	I32 savestack_max;	164	I32 savestack_max;
97	OP **retstack;	165	OP **retstack;
98	I32 retstack_ix;	166	I32 retstack_ix;
99	I32 retstack_max;	167	I32 retstack_max;
		168	PMOP *curpm;
100	COP *curcop;	169	COP *curcop;
101	JMPENV *top_env;
102		170
103	/* data associated with this coroutine (initial args) */	171	/* coro process data */
104	AV *args;	172	int prio;
105	};	173	};
106		174
107	typedef struct coro *Coro__State;	175	typedef struct coro *Coro__State;
108	typedef struct coro *Coro__State_or_hashref;	176	typedef struct coro *Coro__State_or_hashref;
109		177
110	static AV *main_mainstack; /* used to differentiate between $main and others */	178	static AV *
111	static HV *coro_state_stash;	179	coro_clone_padlist (CV *cv)
112	static SV *ucoro_state_sv;
113	static U32 ucoro_state_hash;
114	static HV *padlist_cache;
115
116	/* mostly copied from op.c:cv_clone2 */
117	STATIC AV *
118	clone_padlist (AV *protopadlist)
119	{	180	{
120	AV *av;	181	AV *padlist = CvPADLIST (cv);
121	I32 ix;
122	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
123	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
124	SV **pname = AvARRAY (protopad_name);
125	SV **ppad = AvARRAY (protopad);
126	I32 fname = AvFILLp (protopad_name);
127	I32 fpad = AvFILLp (protopad);
128	AV *newpadlist, *newpad_name, *newpad;	182	AV *newpadlist, *newpad;
129	SV **npad;
130
131	newpad_name = newAV ();
132	for (ix = fname; ix >= 0; ix--)
133	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
134
135	newpad = newAV ();
136	av_fill (newpad, AvFILLp (protopad));
137	npad = AvARRAY (newpad);
138		183
139	newpadlist = newAV ();	184	newpadlist = newAV ();
140	AvREAL_off (newpadlist);	185	AvREAL_off (newpadlist);
141	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)));
142	av_store (newpadlist, 1, (SV *) newpad);	195	av_store (newpadlist, 1, (SV *)newpad);
143		196
144	av = newAV (); /* will be @_ */	197	return newpadlist;
145	av_extend (av, 0);	198	}
146	av_store (newpad, 0, (SV *) av);
147	AvFLAGS (av) = AVf_REIFY;
148		199
149	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))
150	{	205	{
151	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	206	I32 i = AvFILLp (padlist);
152	if (namesv && namesv != &PL_sv_undef)	207	while (i >= 0)
153	{	208	{
154	char *name = SvPVX (namesv); /* XXX */	209	SV **svp = av_fetch (padlist, i--, FALSE);
155	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	210	if (svp)
156	{ /* lexical from outside? */
157	npad[ix] = SvREFCNT_inc (ppad[ix]);
158	}	211	{
159	else
160	{ /* our own lexical */
161	SV *sv;	212	SV *sv;
162	if (*name == '&')	213	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
163	sv = SvREFCNT_inc (ppad[ix]);	214	SvREFCNT_dec (sv);
164	else if (*name == '@')	215
165	sv = (SV *) newAV ();	216	SvREFCNT_dec (*svp);
166	else if (*name == '%')
167	sv = (SV *) newHV ();
168	else
169	sv = NEWSV (0, 0);
170	if (!SvPADBUSY (sv))
171	SvPADMY_on (sv);
172	npad[ix] = sv;
173	}	217	}
174	}	218	}
175	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	219
176	{	220	SvREFCNT_dec ((SV*)padlist);
177	npad[ix] = SvREFCNT_inc (ppad[ix]);
178	}
179	else
180	{
181	SV *sv = NEWSV (0, 0);
182	SvPADTMP_on (sv);
183	npad[ix] = sv;
184	}
185	}	221	}
		222	}
186		223
187	#if 0 /* return -ENOTUNDERSTOOD */	224	static int
188	/* 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;
189		229
190	for (ix = fpad; ix > 0; ix--) {	230	/* casting is fun. */
191	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	231	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
192	if (namesv	232	free_padlist (padlist);
193	&& namesv != &PL_sv_undef	233
194	&& !(SvFLAGS(namesv) & SVf_FAKE)	234	SvREFCNT_dec (av);
195	&& *SvPVX(namesv) == '&'	235
196	&& CvCLONE(ppad[ix]))	236	return 0;
197	{	237	}
198	CV *kid = cv_clone((CV*)ppad[ix]);	238
199	SvREFCNT_dec(ppad[ix]);	239	#define PERL_MAGIC_coro PERL_MAGIC_ext
200	CvCLONE_on(kid);	240
201	SvPADMY_on(kid);	241	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
202	npad[ix] = (SV*)kid;	242
203	}	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 ();
204	}	276	}
205	#endif
206		277
207	return newpadlist;
208	}
209
210	#ifdef MAY_FLUSH
211	STATIC AV *
212	free_padlist (AV *padlist)
213	{
214	/* may be during global destruction */
215	if (SvREFCNT(padlist))
216	{
217	I32 i = AvFILLp(padlist);
218	while (i >= 0)
219	{
220	SV **svp = av_fetch(padlist, i--, FALSE);
221	SV *sv = svp ? *svp : Nullsv;
222	if (sv)
223	SvREFCNT_dec(sv);
224	}
225
226	SvREFCNT_dec((SV*)padlist);
227	}
228	}
229	#endif
230
231	/* the next two functions merely cache the padlists */
232	STATIC void
233	get_padlist (CV *cv)
234	{
235	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
236
237	if (he && AvFILLp ((AV *)*he) >= 0)
238	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
239	else
240	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
241	}
242
243	STATIC void
244	put_padlist (CV *cv)
245	{
246	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
247
248	if (SvTYPE (*he) != SVt_PVAV)
249	{
250	SvREFCNT_dec (*he);
251	*he = (SV *)newAV ();
252	}
253
254	av_push ((AV *)*he, (SV *)CvPADLIST (cv));	278	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
255	}	279	}
256
257	#ifdef MAY_FLUSH
258	STATIC void
259	flush_padlist_cache ()
260	{
261	HV *hv = padlist_cache;
262	padlist_cache = newHV ();
263
264	if (hv_iterinit (hv))
265	{
266	HE *he;
267	AV *padlist;
268
269	while (!!(he = hv_iternext (hv)))
270	{
271	AV *av = (AV *)HeVAL(he);
272
273	/* casting is fun. */
274	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275	free_padlist (padlist);
276	}
277	}
278
279	SvREFCNT_dec (hv);
280	}
281	#endif
282		280
283	#define SB do {	281	#define SB do {
284	#define SE } while (0)	282	#define SE } while (0)
285		283
286	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	284	#define LOAD(state) load_state((state));
287	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	285	#define SAVE(state,flags) save_state((state),(flags));
288		286
289	#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
290		288
291	static void	289	static void
292	load_state(pTHX_ Coro__State c)	290	load_state(Coro__State c)
293	{	291	{
294	PL_dowarn = c->dowarn;	292	PL_dowarn = c->dowarn;
295	PL_in_eval = c->in_eval;	293	PL_in_eval = c->in_eval;
296		294
297	PL_curstackinfo = c->curstackinfo;	295	PL_curstackinfo = c->curstackinfo;
298	PL_curstack = c->curstack;	296	PL_curstack = c->curstack;
299	PL_mainstack = c->mainstack;	297	PL_mainstack = c->mainstack;
300	PL_stack_sp = c->stack_sp;	298	PL_stack_sp = c->stack_sp;
301	PL_op = c->op;	299	PL_op = c->op;
302	PL_curpad = c->curpad;	300	PL_curpad = c->curpad;
		301	PL_comppad = c->comppad;
		302	PL_compcv = c->compcv;
303	PL_stack_base = c->stack_base;	303	PL_stack_base = c->stack_base;
304	PL_stack_max = c->stack_max;	304	PL_stack_max = c->stack_max;
305	PL_tmps_stack = c->tmps_stack;	305	PL_tmps_stack = c->tmps_stack;
306	PL_tmps_floor = c->tmps_floor;	306	PL_tmps_floor = c->tmps_floor;
307	PL_tmps_ix = c->tmps_ix;	307	PL_tmps_ix = c->tmps_ix;
…		…
313	PL_scopestack_ix = c->scopestack_ix;	313	PL_scopestack_ix = c->scopestack_ix;
314	PL_scopestack_max = c->scopestack_max;	314	PL_scopestack_max = c->scopestack_max;
315	PL_savestack = c->savestack;	315	PL_savestack = c->savestack;
316	PL_savestack_ix = c->savestack_ix;	316	PL_savestack_ix = c->savestack_ix;
317	PL_savestack_max = c->savestack_max;	317	PL_savestack_max = c->savestack_max;
		318	#if !PERL_VERSION_ATLEAST (5,9,0)
318	PL_retstack = c->retstack;	319	PL_retstack = c->retstack;
319	PL_retstack_ix = c->retstack_ix;	320	PL_retstack_ix = c->retstack_ix;
320	PL_retstack_max = c->retstack_max;	321	PL_retstack_max = c->retstack_max;
		322	#endif
		323	PL_curpm = c->curpm;
321	PL_curcop = c->curcop;	324	PL_curcop = c->curcop;
322	PL_top_env = c->top_env;
323		325
324	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	326	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
325	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	327	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
326	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	328	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
327		329
…		…
336		338
337	if (padlist)	339	if (padlist)
338	{	340	{
339	put_padlist (cv); /* mark this padlist as available */	341	put_padlist (cv); /* mark this padlist as available */
340	CvPADLIST(cv) = padlist;	342	CvPADLIST(cv) = padlist;
341	#ifdef USE_THREADS
342	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
343	#endif
344	}	343	}
345		344
346	++CvDEPTH(cv);	345	++CvDEPTH(cv);
347	}	346	}
348		347
349	PUTBACK;	348	PUTBACK;
350	}	349	}
351	}	350	}
352		351
353	static void	352	static void
354	save_state(pTHX_ Coro__State c, int flags)	353	save_state(Coro__State c, int flags)
355	{	354	{
356	{	355	{
357	dSP;	356	dSP;
358	I32 cxix = cxstack_ix;	357	I32 cxix = cxstack_ix;
359	PERL_CONTEXT *ccstk = cxstack;	358	PERL_CONTEXT *ccstk = cxstack;
…		…
366		365
367	PUSHs (Nullsv);	366	PUSHs (Nullsv);
368	/* this loop was inspired by pp_caller */	367	/* this loop was inspired by pp_caller */
369	for (;;)	368	for (;;)
370	{	369	{
371	do	370	while (cxix >= 0)
372	{	371	{
373	PERL_CONTEXT *cx = &ccstk[cxix--];	372	PERL_CONTEXT *cx = &ccstk[cxix--];
374		373
375	if (CxTYPE(cx) == CXt_SUB)	374	if (CxTYPE(cx) == CXt_SUB)
376	{	375	{
377	CV *cv = cx->blk_sub.cv;	376	CV *cv = cx->blk_sub.cv;
378	if (CvDEPTH(cv))	377	if (CvDEPTH(cv))
379	{	378	{
380	#ifdef USE_THREADS
381	/*XPUSHs ((SV *)CvOWNER(cv));*/
382	/*CvOWNER(cv) = 0;*/
383	/*error must unlock this cv etc.. etc...*/
384	#endif
385	EXTEND (SP, CvDEPTH(cv)*2);	379	EXTEND (SP, CvDEPTH(cv)*2);
386		380
387	while (--CvDEPTH(cv))	381	while (--CvDEPTH(cv))
388	{	382	{
389	/* this tells the restore code to increment CvDEPTH */	383	/* this tells the restore code to increment CvDEPTH */
…		…
392	}	386	}
393		387
394	PUSHs ((SV *)CvPADLIST(cv));	388	PUSHs ((SV *)CvPADLIST(cv));
395	PUSHs ((SV *)cv);	389	PUSHs ((SV *)cv);
396		390
397	get_padlist (cv); /* this is a monster */	391	get_padlist (cv);
398	}	392	}
399	}	393	}
		394	#ifdef CXt_FORMAT
400	else if (CxTYPE(cx) == CXt_FORMAT)	395	else if (CxTYPE(cx) == CXt_FORMAT)
401	{	396	{
402	/* 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? */
403	/* my bold guess is as a simple, plain sub... */	398	/* my bold guess is as a simple, plain sub... */
404	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");
405	}	400	}
		401	#endif
406	}	402	}
407	while (cxix >= 0);
408		403
409	if (top_si->si_type == PERLSI_MAIN)	404	if (top_si->si_type == PERLSI_MAIN)
410	break;	405	break;
411		406
412	top_si = top_si->si_prev;	407	top_si = top_si->si_prev;
…		…
418	}	413	}
419		414
420	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	415	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
421	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	416	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
422	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	417	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
423
424	/* I have not the slightest idea of why av_reify is necessary */
425	/* but if it's missing the defav contents magically get replaced sometimes */
426	if (c->defav)
427	av_reify (c->defav);
428		418
429	c->dowarn = PL_dowarn;	419	c->dowarn = PL_dowarn;
430	c->in_eval = PL_in_eval;	420	c->in_eval = PL_in_eval;
431		421
432	c->curstackinfo = PL_curstackinfo;	422	c->curstackinfo = PL_curstackinfo;
433	c->curstack = PL_curstack;	423	c->curstack = PL_curstack;
434	c->mainstack = PL_mainstack;	424	c->mainstack = PL_mainstack;
435	c->stack_sp = PL_stack_sp;	425	c->stack_sp = PL_stack_sp;
436	c->op = PL_op;	426	c->op = PL_op;
437	c->curpad = PL_curpad;	427	c->curpad = PL_curpad;
		428	c->comppad = PL_comppad;
		429	c->compcv = PL_compcv;
438	c->stack_base = PL_stack_base;	430	c->stack_base = PL_stack_base;
439	c->stack_max = PL_stack_max;	431	c->stack_max = PL_stack_max;
440	c->tmps_stack = PL_tmps_stack;	432	c->tmps_stack = PL_tmps_stack;
441	c->tmps_floor = PL_tmps_floor;	433	c->tmps_floor = PL_tmps_floor;
442	c->tmps_ix = PL_tmps_ix;	434	c->tmps_ix = PL_tmps_ix;
…		…
448	c->scopestack_ix = PL_scopestack_ix;	440	c->scopestack_ix = PL_scopestack_ix;
449	c->scopestack_max = PL_scopestack_max;	441	c->scopestack_max = PL_scopestack_max;
450	c->savestack = PL_savestack;	442	c->savestack = PL_savestack;
451	c->savestack_ix = PL_savestack_ix;	443	c->savestack_ix = PL_savestack_ix;
452	c->savestack_max = PL_savestack_max;	444	c->savestack_max = PL_savestack_max;
		445	#if !PERL_VERSION_ATLEAST (5,9,0)
453	c->retstack = PL_retstack;	446	c->retstack = PL_retstack;
454	c->retstack_ix = PL_retstack_ix;	447	c->retstack_ix = PL_retstack_ix;
455	c->retstack_max = PL_retstack_max;	448	c->retstack_max = PL_retstack_max;
		449	#endif
		450	c->curpm = PL_curpm;
456	c->curcop = PL_curcop;	451	c->curcop = PL_curcop;
457	c->top_env = PL_top_env;
458	}	452	}
459		453
460	/*	454	/*
461	* allocate various perl stacks. This is an exact copy	455	* allocate various perl stacks. This is an exact copy
462	* of perl.c:init_stacks, except that it uses less memory	456	* of perl.c:init_stacks, except that it uses less memory
463	* on the assumption that coroutines do not usually need	457	* on the (sometimes correct) assumption that coroutines do
464	* a lot of stackspace.	458	* not usually need a lot of stackspace.
465	*/	459	*/
466	STATIC void	460	static void
467	coro_init_stacks (pTHX)	461	coro_init_stacks ()
468	{	462	{
469	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	463	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
470	PL_curstackinfo->si_type = PERLSI_MAIN;	464	PL_curstackinfo->si_type = PERLSI_MAIN;
471	PL_curstack = PL_curstackinfo->si_stack;	465	PL_curstack = PL_curstackinfo->si_stack;
472	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	466	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
482		476
483	New(54,PL_markstack,16,I32);	477	New(54,PL_markstack,16,I32);
484	PL_markstack_ptr = PL_markstack;	478	PL_markstack_ptr = PL_markstack;
485	PL_markstack_max = PL_markstack + 16;	479	PL_markstack_max = PL_markstack + 16;
486		480
		481	#ifdef SET_MARK_OFFSET
487	SET_MARK_OFFSET;	482	SET_MARK_OFFSET;
		483	#endif
488		484
489	New(54,PL_scopestack,16,I32);	485	New(54,PL_scopestack,16,I32);
490	PL_scopestack_ix = 0;	486	PL_scopestack_ix = 0;
491	PL_scopestack_max = 16;	487	PL_scopestack_max = 16;
492		488
493	New(54,PL_savestack,96,ANY);	489	New(54,PL_savestack,96,ANY);
494	PL_savestack_ix = 0;	490	PL_savestack_ix = 0;
495	PL_savestack_max = 96;	491	PL_savestack_max = 96;
496		492
		493	#if !PERL_VERSION_ATLEAST (5,9,0)
497	New(54,PL_retstack,8,OP*);	494	New(54,PL_retstack,8,OP*);
498	PL_retstack_ix = 0;	495	PL_retstack_ix = 0;
499	PL_retstack_max = 8;	496	PL_retstack_max = 8;
		497	#endif
500	}	498	}
501		499
502	/*	500	/*
503	* destroy the stacks, the callchain etc...	501	* destroy the stacks, the callchain etc...
504	* still there is a memleak of 128 bytes...
505	*/	502	*/
506	STATIC void	503	static void
507	destroy_stacks(pTHX)	504	coro_destroy_stacks()
508	{	505	{
		506	if (!IN_DESTRUCT)
		507	{
509	/* is this ugly, I ask? */	508	/* is this ugly, I ask? */
510	while (PL_scopestack_ix)	509	LEAVE_SCOPE (0);
511	LEAVE;
512		510
513	/* sure it is, but more important: is it correct?? :/ */	511	/* sure it is, but more important: is it correct?? :/ */
514	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
515	FREETMPS;	512	FREETMPS;
		513
		514	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
		515	}
516		516
517	while (PL_curstackinfo->si_next)	517	while (PL_curstackinfo->si_next)
518	PL_curstackinfo = PL_curstackinfo->si_next;	518	PL_curstackinfo = PL_curstackinfo->si_next;
519		519
520	while (PL_curstackinfo)	520	while (PL_curstackinfo)
521	{	521	{
522	PERL_SI *p = PL_curstackinfo->si_prev;	522	PERL_SI *p = PL_curstackinfo->si_prev;
523		523
524	{	524	{ /*D*//*remove*/
525	dSP;	525	dSP;
526	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	526	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527	PUTBACK; /* possibly superfluous */	527	PUTBACK; /* possibly superfluous */
528	}	528	}
529		529
530	dounwind(-1);	530	if (!IN_DESTRUCT)
531		531	{
		532	dounwind (-1);/*D*//*remove*/
532	SvREFCNT_dec(PL_curstackinfo->si_stack);	533	SvREFCNT_dec (PL_curstackinfo->si_stack);
		534	}
		535
533	Safefree(PL_curstackinfo->si_cxstack);	536	Safefree (PL_curstackinfo->si_cxstack);
534	Safefree(PL_curstackinfo);	537	Safefree (PL_curstackinfo);
535	PL_curstackinfo = p;	538	PL_curstackinfo = p;
536	}	539	}
537		540
538	Safefree(PL_tmps_stack);	541	Safefree (PL_tmps_stack);
539	Safefree(PL_markstack);	542	Safefree (PL_markstack);
540	Safefree(PL_scopestack);	543	Safefree (PL_scopestack);
541	Safefree(PL_savestack);	544	Safefree (PL_savestack);
		545	#if !PERL_VERSION_ATLEAST (5,9,0)
542	Safefree(PL_retstack);	546	Safefree (PL_retstack);
543	}
544
545	static void
546	allocate_stack (Coro__State ctx, int alloc)
547	{
548	coro_stack *stack;
549
550	New (0, stack, 1, coro_stack);
551
552	stack->refcnt = 1;
553	stack->usecnt = 1;
554	stack->gencnt = ctx->gencnt = 0;
555	if (alloc)
556	{
557	#ifdef HAVE_MMAP
558	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
559	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
560	if (stack->sptr == (void *)-1)
561	#endif	547	#endif
562	{
563	/*FIXME*//*D*//* reasonable stack size! */
564	stack->ssize = -4096 * sizeof (long);
565	New (0, stack->sptr, 4096, long);
566	}
567	}
568	else
569	stack->sptr = 0;
570
571	ctx->stack = stack;
572	}	548	}
573		549
574	static void	550	static void
575	deallocate_stack (Coro__State ctx)	551	setup_coro (struct coro *coro)
576	{
577	coro_stack *stack = ctx->stack;
578
579	ctx->stack = 0;
580
581	if (stack)
582	{
583	if (!--stack->refcnt)
584	{
585	#ifdef HAVE_MMAP
586	if (stack->ssize > 0 && stack->sptr)
587	munmap (stack->sptr, stack->ssize);
588	else
589	#else
590	Safefree (stack->sptr);
591	#endif
592	Safefree (stack);
593	}
594	else if (ctx->gencnt == stack->gencnt)
595	--stack->usecnt;
596	}
597	}
598
599	static void
600	setup_coro (void *arg)
601	{	552	{
602	/*	553	/*
603	* emulate part of the perl startup here.	554	* emulate part of the perl startup here.
604	*/	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	{
605	dSP;	602	dSP;
606	Coro__State ctx = (Coro__State)arg;	603	LOGOP myop;
607	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
608		604
609	coro_init_stacks (aTHX);	605	Zero (&myop, 1, LOGOP);
610	/*PL_curcop = 0;*/	606	myop.op_next = PL_op;
611	/*PL_in_eval = PL_in_eval;*/ /* inherit */	607	myop.op_flags = OPf_WANT_VOID;
612	SvREFCNT_dec (GvAV (PL_defgv));
613	GvAV (PL_defgv) = ctx->args;
614		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);
615	SPAGAIN;	615	SPAGAIN;
616
617	if (ctx->stack)
618	{
619	ctx->cursp = 0;
620
621	PUSHMARK(SP);
622	PUTBACK;
623	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
624
625	if (SvTRUE (ERRSV))
626	croak (NULL);
627	else
628	croak ("FATAL: CCTXT coroutine returned!");
629	}
630	else
631	{
632	UNOP myop;
633
634	PL_op = (OP *)&myop;
635
636	Zero(&myop, 1, UNOP);
637	myop.op_next = Nullop;
638	myop.op_flags = OPf_WANT_VOID;
639
640	PUSHMARK(SP);
641	XPUSHs (sub_init);
642	/*
643	* the next line is slightly wrong, as PL_op->op_next
644	* is actually being executed so we skip the first op.
645	* that doesn't matter, though, since it is only
646	* pp_nextstate and we never return...
647	* ah yes, and I don't care anyways ;)
648	*/
649	PUTBACK;
650	PL_op = pp_entersub();
651	SPAGAIN;
652
653	ENTER; /* necessary e.g. for dounwind */
654	}
655	}	616	}
656		617
657	static void	618	static void
658	continue_coro (void *arg)	619	coro_run (void *arg)
659	{	620	{
		621	/* coro_run is the alternative epilogue of transfer() */
		622	UNLOCK;
		623
660	/*	624	/*
661	* this is a _very_ stripped down perl interpreter ;)	625	* this is a _very_ stripped down perl interpreter ;)
662	*/	626	*/
663	Coro__State ctx = (Coro__State)arg;	627	PL_top_env = &PL_start_env;
		628	/* inject call to cctx_init */
		629	prepare_cctx ((coro_stack *)arg);
664		630
665	/*FIXME*//* must set up top_env here */	631	/* somebody will hit me for both perl_run and PL_restartop */
666	ctx->cursp = 0;	632	perl_run (PL_curinterp);
667	PL_op = PL_op->op_next;
668	CALLRUNOPS(aTHX);
669		633
		634	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
670	abort ();	635	abort ();
671	}	636	}
672		637
673	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
674	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	739	transfer (struct coro *prev, struct coro *next, int flags)
675	{	740	{
676	dSP;
677	dSTACKLEVEL;	741	dSTACKLEVEL;
678		742
		743	/* sometimes transfer is only called to set idle_sp */
		744	if (flags == TRANSFER_SET_STACKLEVEL)
		745	((coro_stack *)prev)->idle_sp = STACKLEVEL;
679	if (prev != next)	746	else if (prev != next)
680	{	747	{
		748	coro_stack *prev__stack;
		749
		750	LOCK;
		751
681	if (next->mainstack)	752	if (next->mainstack)
682	{	753	{
		754	/* coroutine already started */
683	SAVE (prev, flags);	755	SAVE (prev, flags);
684	LOAD (next);	756	LOAD (next);
685
686	/* mark this state as in-use */
687	next->mainstack = 0;
688	next->tmps_ix = -2;
689
690	/* stacklevel changed? if yes, grab the stack for us! */
691	if (flags & TRANSFER_SAVE_CCTXT)
692	{
693	if (!prev->stack)
694	allocate_stack (prev, 0);
695	else if (prev->cursp != stacklevel
696	&& prev->stack->usecnt > 1)
697	{
698	prev->gencnt = ++prev->stack->gencnt;
699	prev->stack->usecnt = 1;
700	}
701
702	/* has our stack been invalidated? */
703	if (next->stack && next->stack->gencnt != next->gencnt)
704	{
705	deallocate_stack (next);
706	allocate_stack (next, 1);
707	coro_create (&(next->stack->cctx),
708	continue_coro, (void *)next,
709	next->stack->sptr, labs (next->stack->ssize));
710	}
711
712	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
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	}
744	}
745	else
746	setup_coro (next);	764	setup_coro (next);
		765	/* need a stack */
		766	next->stack = 0;
747	}	767	}
		768
		769	if (!prev->stack)
		770	/* create a new empty context */
		771	Newz (0, prev->stack, 1, coro_stack);
		772
		773	prev__stack = prev->stack;
		774
		775	/* possibly "free" the stack */
		776	if (prev__stack->idle_sp == STACKLEVEL)
		777	{
		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;
748	}	795	}
749
750	next->cursp = stacklevel;
751	}	796	}
		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	};
752		862
753	static struct coro *	863	static struct coro *
754	sv_to_coro (SV *arg, const char *funcname, const char *varname)	864	SvSTATE (SV *coro)
755	{	865	{
756	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)
757	{	874	{
758	HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);	875	/* very slow, but rare, check */
759		876	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
760	if (!he)	877	croak ("Coro::State object required");
761	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
762
763	arg = HeVAL(he);
764	}	878	}
765		879
766	/* must also be changed inside Coro::Cont::yield */	880	mg = SvMAGIC (coro);
767	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)	881	assert (mg->mg_type == PERL_MAGIC_ext);
768	return (struct coro *) SvIV((SV*)SvRV(arg));	882	return (struct coro *)mg->mg_ptr;
769	else	883	}
770	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	884
		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
		894	api_transfer (SV *prev, SV *next, int flags)
		895	{
		896	dTHX;
		897	struct transfer_args ta;
		898
		899	prepare_transfer (&ta, prev, next, flags);
		900	TRANSFER (ta);
771	}	901	}
772		902
773	/** Coro ********************************************************************/	903	/** Coro ********************************************************************/
774		904
775	#define PRIO_MAX 3	905	#define PRIO_MAX 3
…		…
779	#define PRIO_IDLE -3	909	#define PRIO_IDLE -3
780	#define PRIO_MIN -4	910	#define PRIO_MIN -4
781		911
782	/* for Coro.pm */	912	/* for Coro.pm */
783	static GV *coro_current, *coro_idle;	913	static GV *coro_current, *coro_idle;
784	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	914	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		915	static int coro_nready;
785		916
786	static void	917	static void
787	coro_enq (SV *sv)	918	coro_enq (SV *sv)
788	{	919	{
789	if (SvROK (sv))	920	int prio;
790	{	921
791	SV *hv = SvRV (sv);
792	if (SvTYPE (hv) == SVt_PVHV)	922	if (SvTYPE (sv) != SVt_PVHV)
793	{
794	SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0);
795	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
796
797	prio = prio > PRIO_MAX ? PRIO_MAX
798	: prio < PRIO_MIN ? PRIO_MIN
799	: prio;
800
801	av_push (coro_ready [prio - PRIO_MIN], sv);
802
803	return;
804	}
805	}
806
807	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++;
808	}	929	}
809		930
810	static SV *	931	static SV *
811	coro_deq (int min_prio)	932	coro_deq (int min_prio)
812	{	933	{
…		…
815	min_prio -= PRIO_MIN;	936	min_prio -= PRIO_MIN;
816	if (min_prio < 0)	937	if (min_prio < 0)
817	min_prio = 0;	938	min_prio = 0;
818		939
819	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	940	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
820	if (av_len (coro_ready[prio]) >= 0)	941	if (AvFILLp (coro_ready [prio]) >= 0)
		942	{
		943	coro_nready--;
821	return av_shift (coro_ready[prio]);	944	return av_shift (coro_ready [prio]);
		945	}
822		946
823	return 0;	947	return 0;
824	}	948	}
825		949
		950	static void
		951	api_ready (SV *coro)
		952	{
		953	dTHX;
		954
		955	if (SvROK (coro))
		956	coro = SvRV (coro);
		957
		958	LOCK;
		959	coro_enq (SvREFCNT_inc (coro));
		960	UNLOCK;
		961	}
		962
		963	static void
		964	prepare_schedule (struct transfer_args *ta)
		965	{
		966	SV *current, *prev, *next;
		967
		968	current = GvSV (coro_current);
		969
		970	for (;;)
		971	{
		972	LOCK;
		973	next = coro_deq (PRIO_MIN);
		974	UNLOCK;
		975
		976	if (next)
		977	break;
		978
		979	{
		980	dSP;
		981
		982	ENTER;
		983	SAVETMPS;
		984
		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);
		1036	}
		1037
826	MODULE = Coro::State PACKAGE = Coro::State	1038	MODULE = Coro::State PACKAGE = Coro::State
827		1039
828	PROTOTYPES: ENABLE	1040	PROTOTYPES: DISABLE
829		1041
830	BOOT:	1042	BOOT:
831	{ /* {} necessary for stoopid perl-5.6.x */	1043	{
832	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1044	#ifdef USE_ITHREADS
833	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1045	MUTEX_INIT (&coro_mutex);
		1046	#endif
		1047	BOOT_PAGESIZE;
		1048
834	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1049	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
835		1050
836	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1051	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
837	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1052	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
838	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1053	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
839	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
840
841	if (!padlist_cache)
842	padlist_cache = newHV ();
843		1054
844	main_mainstack = PL_mainstack;	1055	main_mainstack = PL_mainstack;
845	}
846		1056
847	Coro::State	1057	coroapi.ver = CORO_API_VERSION;
848	_newprocess(args)	1058	coroapi.transfer = api_transfer;
849	SV * args	1059
850	PROTOTYPE: $	1060	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1061	}
		1062
		1063	SV *
		1064	new (char *klass, ...)
851	CODE:	1065	CODE:
852	Coro__State coro;	1066	{
		1067	struct coro *coro;
		1068	HV *hv;
		1069	int i;
853		1070
854	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
855	croak ("Coro::State::_newprocess expects an arrayref");
856
857	New (0, coro, 1, struct coro);	1071	Newz (0, coro, 1, struct coro);
		1072	coro->args = newAV ();
858		1073
859	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
860	coro->mainstack = 0; /* actual work is done inside transfer */	1081	/*coro->mainstack = 0; *//*actual work is done inside transfer */
861	coro->stack = 0;	1082	/*coro->stack = 0;*/
862		1083	}
863	RETVAL = coro;
864	OUTPUT:	1084	OUTPUT:
865	RETVAL	1085	RETVAL
866		1086
867	void	1087	void
868	transfer(prev, next, flags)	1088	_set_stacklevel (...)
869	Coro::State_or_hashref prev	1089	ALIAS:
870	Coro::State_or_hashref next	1090	Coro::State::transfer = 1
871	int flags	1091	Coro::schedule = 2
872	PROTOTYPE: @	1092	Coro::cede = 3
		1093	Coro::Cont::yield = 4
873	CODE:	1094	CODE:
874	PUTBACK;	1095	{
875	transfer (aTHX_ prev, next, flags);	1096	struct transfer_args ta;
876	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	}
877		1151
878	void	1152	void
879	DESTROY(coro)	1153	_clone_state_from (SV *dst, SV *src)
880	Coro::State coro	1154	CODE:
881	CODE:	1155	{
		1156	struct coro *coro_src = SvSTATE (src);
882		1157
883	if (coro->mainstack && coro->mainstack != main_mainstack)	1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
884	{
885	struct coro temp;
886		1159
887	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1160	++coro_src->refcnt;
888	LOAD(aTHX_ coro);	1161	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
889		1162	}
890	destroy_stacks (aTHX);
891
892	LOAD((&temp)); /* this will get rid of defsv etc.. */
893
894	coro->mainstack = 0;
895	}
896
897	deallocate_stack (coro);
898
899	Safefree (coro);
900		1163
901	void	1164	void
902	flush()
903	CODE:
904	#ifdef MAY_FLUSH
905	flush_padlist_cache ();
906	#endif
907
908	void
909	_exit(code)	1165	_exit (code)
910	int code	1166	int code
911	PROTOTYPE: $	1167	PROTOTYPE: $
912	CODE:	1168	CODE:
913	#if defined(__GLIBC__) || _POSIX_C_SOURCE
914	_exit (code);	1169	_exit (code);
915	#else
916	signal (SIGTERM, SIG_DFL);
917	raise (SIGTERM);
918	exit (code);
919	#endif
920
921	MODULE = Coro::State PACKAGE = Coro::Cont
922
923	# this is slightly dirty (should expose a c-level api)
924
925	void
926	yield(...)
927	PROTOTYPE: @
928	CODE:
929	static SV *returnstk;
930	SV *sv;
931	AV *defav = GvAV (PL_defgv);
932	struct coro *prev, *next;
933
934	if (!returnstk)
935	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
936
937	/* set up @_ -- ugly */
938	av_clear (defav);
939	av_fill (defav, items - 1);
940	while (items--)
941	av_store (defav, items, SvREFCNT_inc (ST(items)));
942
943	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
944	sv = av_pop ((AV *)SvRV (returnstk));
945	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
946	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
947	SvREFCNT_dec (sv);
948
949	transfer(aTHX_ prev, next, 0);
950		1170
951	MODULE = Coro::State PACKAGE = Coro	1171	MODULE = Coro::State PACKAGE = Coro
952		1172
953	# this is slightly dirty (should expose a c-level api)
954
955	BOOT:	1173	BOOT:
956	{	1174	{
957	int i;	1175	int i;
		1176
958	HV *stash = gv_stashpv ("Coro", TRUE);	1177	coro_stash = gv_stashpv ("Coro", TRUE);
959		1178
960	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1179	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
961	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1180	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
962	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1181	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
963	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1182	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
964	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1183	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
965	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1184	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
966		1185
967	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1186	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
968	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1187	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
969		1188
970	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1189	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
971	coro_ready[i] = newAV ();	1190	coro_ready[i] = newAV ();
		1191
		1192	{
		1193	SV *sv = perl_get_sv("Coro::API", 1);
		1194
		1195	coroapi.schedule = api_schedule;
		1196	coroapi.cede = api_cede;
		1197	coroapi.ready = api_ready;
		1198	coroapi.nready = &coro_nready;
		1199	coroapi.current = coro_current;
		1200
		1201	GCoroAPI = &coroapi;
		1202	sv_setiv (sv, (IV)&coroapi);
		1203	SvREADONLY_on (sv);
		1204	}
		1205	}
		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	}
972	}	1225	}
973		1226
974	void	1227	void
975	ready(self)	1228	ready (SV *self)
976	SV * self	1229	PROTOTYPE: $
977	CODE:	1230	CODE:
978	coro_enq (SvREFCNT_inc (self));	1231	api_ready (self);
		1232
		1233	int
		1234	nready (...)
		1235	PROTOTYPE:
		1236	CODE:
		1237	RETVAL = coro_nready;
		1238	OUTPUT:
		1239	RETVAL
		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
979		1263
980	void	1264	void
981	schedule(...)	1265	_set_state (char *data_)
982	ALIAS:	1266	PROTOTYPE: $
983	cede = 1
984	CODE:	1267	CODE:
985	SV *prev, *next;	1268	{
		1269	struct {
		1270	int errorno;
		1271	int laststype;
		1272	int laststatval;
		1273	Stat_t statcache;
		1274	} *data = (void *)data_;
986		1275
987	prev = GvSV (coro_current);	1276	errno = data->errorno;
988		1277	PL_laststype = data->laststype;
989	if (ix)	1278	PL_laststatval = data->laststatval;
990	coro_enq (SvREFCNT_inc (prev));	1279	PL_statcache = data->statcache;
991		1280	}
992	next = coro_deq (PRIO_MIN);
993
994	if (!next)
995	next = SvREFCNT_inc (GvSV (coro_idle));
996
997	GvSV (coro_current) = SvREFCNT_inc (next);
998	transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"),
999	sv_to_coro (next, "Coro::schedule", "next coroutine"),
1000	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
1001	SvREFCNT_dec (next);
1002	SvREFCNT_dec (prev);
1003

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