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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.16 by root, Wed Jul 25 04:26:55 2001 UTC vs.
Revision 1.89 by root, Sat Nov 25 00:40:26 2006 UTC

		1	#define PERL_NO_GET_CONTEXT
		2
		3	#include "libcoro/coro.c"
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "libcoro/coro.c"	9	#include "patchlevel.h"
		10
		11	#if PERL_VERSION < 6
		12	# ifndef PL_ppaddr
		13	# define PL_ppaddr ppaddr
		14	# endif
		15	# ifndef call_sv
		16	# define call_sv perl_call_sv
		17	# endif
		18	# ifndef get_sv
		19	# define get_sv perl_get_sv
		20	# endif
		21	# ifndef get_cv
		22	# define get_cv perl_get_cv
		23	# endif
		24	# ifndef IS_PADGV
		25	# define IS_PADGV(v) 0
		26	# endif
		27	# ifndef IS_PADCONST
		28	# define IS_PADCONST(v) 0
		29	# endif
		30	#endif
		31
		32	#include <errno.h>
		33
		34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		35	# undef STACKGUARD
		36	#endif
		37
		38	#ifndef STACKGUARD
		39	# define STACKGUARD 0
		40	#endif
6		41
7	#ifdef HAVE_MMAP	42	#ifdef HAVE_MMAP
8	# include <unistd.h>	43	# include <unistd.h>
9	# include <sys/mman.h>	44	# include <sys/mman.h>
10	# ifndef MAP_ANON
11	# ifdef MAP_ANONYMOUS	45	# ifndef MAP_ANONYMOUS
12	# define MAP_ANON MAP_ANONYMOUS	46	# ifdef MAP_ANON
		47	# define MAP_ANONYMOUS MAP_ANON
13	# else	48	# else
14	# undef HAVE_MMAP	49	# undef HAVE_MMAP
15	# endif	50	# endif
16	# endif	51	# endif
		52	# include <limits.h>
		53	# ifndef PAGESIZE
		54	# define PAGESIZE pagesize
		55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		56	static long pagesize;
		57	# else
		58	# define BOOT_PAGESIZE
17	#endif	59	# endif
18
19	#define MAY_FLUSH /* increases codesize */
20
21	/* perl-related */
22	#define TRANSFER_SAVE_DEFAV 0x00000001
23	#define TRANSFER_SAVE_DEFSV 0x00000002
24	#define TRANSFER_SAVE_ERRSV 0x00000004
25	/* c-related */
26	#define TRANSFER_SAVE_CCTXT 0x00000008
27	#ifdef CORO_LAZY_STACK
28	# define TRANSFER_LAZY_STACK 0x00000010
29	#else
30	# define TRANSFER_LAZY_STACK 0x00000000
31	#endif	60	#endif
32		61
33	#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \
34	|TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT)
35
36	#define SUB_INIT "Coro::State::initialize"	62	#define SUB_INIT "Coro::State::initialize"
37	#define UCORO_STATE "_coro_state"
38		63
39	/* The next macro should delcare a variable stacklevel that contains and approximation	64	/* The next macro should declare a variable stacklevel that contains and approximation
40	* to the current C stack pointer. It's property is that it changes with each call	65	* to the current C stack pointer. Its property is that it changes with each call
41	* and should be unique. */	66	* and should be unique. */
42	#define dSTACKLEVEL void *stacklevel = &stacklevel	67	#define dSTACKLEVEL void *stacklevel = &stacklevel
43		68
		69	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		70
44	#define labs(l) ((l) >= 0 ? (l) : -(l))	71	#define labs(l) ((l) >= 0 ? (l) : -(l))
45		72
		73	#include "CoroAPI.h"
		74
		75	#ifdef USE_ITHREADS
		76	static perl_mutex coro_mutex;
		77	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		78	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		79	#else
		80	# define LOCK (void)0
		81	# define UNLOCK (void)0
		82	#endif
		83
		84	static struct CoroAPI coroapi;
		85	static AV *main_mainstack; /* used to differentiate between $main and others */
		86	static HV *coro_state_stash, *coro_stash;
		87	static SV *coro_mortal; /* will be freed after next transfer */
		88
46	/* this is actually not only the c stack but also c registers etc... */	89	/* this is actually not just the c stack but also c registers etc... */
47	typedef struct {	90	typedef struct coro_stack {
48	int refcnt; /* pointer reference counter */	91	struct coro_stack *next;
49	int usecnt; /* shared by how many coroutines */
50	int gencnt; /* generation counter */
51		92
52	coro_context cctx;	93	void *idle_sp;
53
54	void *sptr;	94	void *sptr;
55	long ssize; /* positive == mmap, otherwise malloc */	95	long ssize; /* positive == mmap, otherwise malloc */
		96
		97	/* cpu state */
		98	coro_context cctx;
56	} coro_stack;	99	} coro_stack;
57		100
58	static coro_stack main_stack = { 1, 0, 0 };	101	static coro_stack *main_stack;
59		102
60	struct coro {	103	struct coro {
61	/* the optional C context */
62	coro_stack *stack;
63	void *cursp;
64	int gencnt;
65
66	/* optionally saved, might be zero */	104	/* optionally saved, might be zero */
67	AV *defav;	105	AV *defav;
68	SV *defsv;	106	SV *defsv;
69	SV *errsv;	107	SV *errsv;
70		108
71	/* saved global state not related to stacks */	109	/* saved global state not related to stacks */
72	U8 dowarn;	110	U8 dowarn;
		111	I32 in_eval;
		112
		113	/* the c stack, if any */
		114	coro_stack *stack;
73		115
74	/* the stacks and related info (callchain etc..) */	116	/* the stacks and related info (callchain etc..) */
75	PERL_SI *curstackinfo;	117	PERL_SI *curstackinfo;
76	AV *curstack;	118	AV *curstack;
77	AV *mainstack;	119	AV *mainstack;
78	SV **stack_sp;	120	SV **stack_sp;
79	OP *op;	121	OP *op;
80	SV **curpad;	122	SV **curpad;
		123	AV *comppad;
		124	CV *compcv;
81	SV **stack_base;	125	SV **stack_base;
82	SV **stack_max;	126	SV **stack_max;
83	SV **tmps_stack;	127	SV **tmps_stack;
84	I32 tmps_floor;	128	I32 tmps_floor;
85	I32 tmps_ix;	129	I32 tmps_ix;
…		…
94	I32 savestack_ix;	138	I32 savestack_ix;
95	I32 savestack_max;	139	I32 savestack_max;
96	OP **retstack;	140	OP **retstack;
97	I32 retstack_ix;	141	I32 retstack_ix;
98	I32 retstack_max;	142	I32 retstack_max;
		143	PMOP *curpm;
99	COP *curcop;	144	COP *curcop;
100	JMPENV start_env;
101	JMPENV *top_env;	145	JMPENV *top_env;
		146
		147	/* coro process data */
		148	int prio;
102		149
103	/* data associated with this coroutine (initial args) */	150	/* data associated with this coroutine (initial args) */
104	AV *args;	151	AV *args;
		152	int refcnt;
105	};	153	};
106		154
107	typedef struct coro *Coro__State;	155	typedef struct coro *Coro__State;
108	typedef struct coro *Coro__State_or_hashref;	156	typedef struct coro *Coro__State_or_hashref;
109		157
110	static AV *main_mainstack; /* used to differentiate between $main and others */	158	static AV *
111	static HV *coro_state_stash;	159	coro_clone_padlist (pTHX_ 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	{	160	{
120	AV *av;	161	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;	162	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		163
139	newpadlist = newAV ();	164	newpadlist = newAV ();
140	AvREAL_off (newpadlist);	165	AvREAL_off (newpadlist);
141	av_store (newpadlist, 0, (SV *) newpad_name);	166	#if PERL_VERSION < 9
		167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		168	#else
		169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		170	#endif
		171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		172	--AvFILLp (padlist);
		173
		174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
142	av_store (newpadlist, 1, (SV *) newpad);	175	av_store (newpadlist, 1, (SV *)newpad);
143		176
144	av = newAV (); /* will be @_ */	177	return newpadlist;
145	av_extend (av, 0);	178	}
146	av_store (newpad, 0, (SV *) av);
147	AvFLAGS (av) = AVf_REIFY;
148		179
149	for (ix = fpad; ix > 0; ix--)	180	static void
		181	free_padlist (pTHX_ AV *padlist)
		182	{
		183	/* may be during global destruction */
		184	if (SvREFCNT (padlist))
150	{	185	{
151	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	186	I32 i = AvFILLp (padlist);
152	if (namesv && namesv != &PL_sv_undef)	187	while (i >= 0)
153	{	188	{
154	char *name = SvPVX (namesv); /* XXX */	189	SV **svp = av_fetch (padlist, i--, FALSE);
155	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	190	if (svp)
156	{ /* lexical from outside? */
157	npad[ix] = SvREFCNT_inc (ppad[ix]);
158	}	191	{
159	else
160	{ /* our own lexical */
161	SV *sv;	192	SV *sv;
162	if (*name == '&')	193	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
163	sv = SvREFCNT_inc (ppad[ix]);	194	SvREFCNT_dec (sv);
164	else if (*name == '@')	195
165	sv = (SV *) newAV ();	196	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	}	197	}
174	}	198	}
175	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	199
176	{	200	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	}	201	}
		202	}
186		203
187	#if 0 /* return -ENOTUNDERSTOOD */	204	static int
188	/* Now that vars are all in place, clone nested closures. */	205	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		206	{
		207	AV *padlist;
		208	AV *av = (AV *)mg->mg_obj;
189		209
190	for (ix = fpad; ix > 0; ix--) {	210	/* casting is fun. */
191	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	211	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
192	if (namesv	212	free_padlist (aTHX_ padlist);
193	&& namesv != &PL_sv_undef	213
194	&& !(SvFLAGS(namesv) & SVf_FAKE)	214	SvREFCNT_dec (av);
195	&& *SvPVX(namesv) == '&'	215
196	&& CvCLONE(ppad[ix]))	216	return 0;
197	{	217	}
198	CV *kid = cv_clone((CV*)ppad[ix]);	218
199	SvREFCNT_dec(ppad[ix]);	219	#define PERL_MAGIC_coro PERL_MAGIC_ext
200	CvCLONE_on(kid);	220
201	SvPADMY_on(kid);	221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
202	npad[ix] = (SV*)kid;	222
203	}	223	/* the next two functions merely cache the padlists */
		224	static void
		225	get_padlist (pTHX_ CV *cv)
		226	{
		227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		228
		229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
		230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
		231	else
		232	{
		233	#if 0
		234	/* this should work - but it doesn't :( */
		235	CV *cp = Perl_cv_clone (aTHX_ cv);
		236	CvPADLIST (cv) = CvPADLIST (cp);
		237	CvPADLIST (cp) = 0;
		238	SvREFCNT_dec (cp);
		239	#else
		240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		241	#endif
		242	}
		243	}
		244
		245	static void
		246	put_padlist (pTHX_ CV *cv)
		247	{
		248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		249
		250	if (!mg)
		251	{
		252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		254	mg->mg_virtual = &vtbl_coro;
		255	mg->mg_obj = (SV *)newAV ();
204	}	256	}
205	#endif
206		257
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));	258	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
255	}	259	}
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		260
283	#define SB do {	261	#define SB do {
284	#define SE } while (0)	262	#define SE } while (0)
285		263
286	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	264	#define LOAD(state) load_state(aTHX_ (state));
287	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
288		266
289	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
290		268
291	static void	269	static void
292	load_state(pTHX_ Coro__State c)	270	load_state(pTHX_ Coro__State c)
293	{	271	{
294	PL_dowarn = c->dowarn;	272	PL_dowarn = c->dowarn;
		273	PL_in_eval = c->in_eval;
295		274
296	PL_curstackinfo = c->curstackinfo;	275	PL_curstackinfo = c->curstackinfo;
297	PL_curstack = c->curstack;	276	PL_curstack = c->curstack;
298	PL_mainstack = c->mainstack;	277	PL_mainstack = c->mainstack;
299	PL_stack_sp = c->stack_sp;	278	PL_stack_sp = c->stack_sp;
300	PL_op = c->op;	279	PL_op = c->op;
301	PL_curpad = c->curpad;	280	PL_curpad = c->curpad;
		281	PL_comppad = c->comppad;
		282	PL_compcv = c->compcv;
302	PL_stack_base = c->stack_base;	283	PL_stack_base = c->stack_base;
303	PL_stack_max = c->stack_max;	284	PL_stack_max = c->stack_max;
304	PL_tmps_stack = c->tmps_stack;	285	PL_tmps_stack = c->tmps_stack;
305	PL_tmps_floor = c->tmps_floor;	286	PL_tmps_floor = c->tmps_floor;
306	PL_tmps_ix = c->tmps_ix;	287	PL_tmps_ix = c->tmps_ix;
…		…
312	PL_scopestack_ix = c->scopestack_ix;	293	PL_scopestack_ix = c->scopestack_ix;
313	PL_scopestack_max = c->scopestack_max;	294	PL_scopestack_max = c->scopestack_max;
314	PL_savestack = c->savestack;	295	PL_savestack = c->savestack;
315	PL_savestack_ix = c->savestack_ix;	296	PL_savestack_ix = c->savestack_ix;
316	PL_savestack_max = c->savestack_max;	297	PL_savestack_max = c->savestack_max;
		298	#if PERL_VERSION < 9
317	PL_retstack = c->retstack;	299	PL_retstack = c->retstack;
318	PL_retstack_ix = c->retstack_ix;	300	PL_retstack_ix = c->retstack_ix;
319	PL_retstack_max = c->retstack_max;	301	PL_retstack_max = c->retstack_max;
		302	#endif
		303	PL_curpm = c->curpm;
320	PL_curcop = c->curcop;	304	PL_curcop = c->curcop;
321	PL_start_env = c->start_env;
322	PL_top_env = c->top_env;	305	PL_top_env = c->top_env;
323		306
324	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
325	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
326	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	309	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
…		…
334	{	317	{
335	AV *padlist = (AV *)POPs;	318	AV *padlist = (AV *)POPs;
336		319
337	if (padlist)	320	if (padlist)
338	{	321	{
339	put_padlist (cv); /* mark this padlist as available */	322	put_padlist (aTHX_ cv); /* mark this padlist as available */
340	CvPADLIST(cv) = padlist;	323	CvPADLIST(cv) = padlist;
341	#ifdef USE_THREADS
342	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
343	#endif
344	}	324	}
345		325
346	++CvDEPTH(cv);	326	++CvDEPTH(cv);
347	}	327	}
348		328
…		…
366		346
367	PUSHs (Nullsv);	347	PUSHs (Nullsv);
368	/* this loop was inspired by pp_caller */	348	/* this loop was inspired by pp_caller */
369	for (;;)	349	for (;;)
370	{	350	{
371	do	351	while (cxix >= 0)
372	{	352	{
373	PERL_CONTEXT *cx = &ccstk[cxix--];	353	PERL_CONTEXT *cx = &ccstk[cxix--];
374		354
375	if (CxTYPE(cx) == CXt_SUB)	355	if (CxTYPE(cx) == CXt_SUB)
376	{	356	{
377	CV *cv = cx->blk_sub.cv;	357	CV *cv = cx->blk_sub.cv;
378	if (CvDEPTH(cv))	358	if (CvDEPTH(cv))
379	{	359	{
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);	360	EXTEND (SP, CvDEPTH(cv)*2);
386		361
387	while (--CvDEPTH(cv))	362	while (--CvDEPTH(cv))
388	{	363	{
389	/* this tells the restore code to increment CvDEPTH */	364	/* this tells the restore code to increment CvDEPTH */
…		…
392	}	367	}
393		368
394	PUSHs ((SV *)CvPADLIST(cv));	369	PUSHs ((SV *)CvPADLIST(cv));
395	PUSHs ((SV *)cv);	370	PUSHs ((SV *)cv);
396		371
397	get_padlist (cv); /* this is a monster */	372	get_padlist (aTHX_ cv);
398	}	373	}
399	}	374	}
		375	#ifdef CXt_FORMAT
400	else if (CxTYPE(cx) == CXt_FORMAT)	376	else if (CxTYPE(cx) == CXt_FORMAT)
401	{	377	{
402	/* I never used formats, so how should I know how these are implemented? */	378	/* I never used formats, so how should I know how these are implemented? */
403	/* my bold guess is as a simple, plain sub... */	379	/* my bold guess is as a simple, plain sub... */
404	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	380	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
405	}	381	}
		382	#endif
406	}	383	}
407	while (cxix >= 0);
408		384
409	if (top_si->si_type == PERLSI_MAIN)	385	if (top_si->si_type == PERLSI_MAIN)
410	break;	386	break;
411		387
412	top_si = top_si->si_prev;	388	top_si = top_si->si_prev;
…		…
419		395
420	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	396	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
421	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
422	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	398	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
423		399
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
429	c->dowarn = PL_dowarn;	400	c->dowarn = PL_dowarn;
		401	c->in_eval = PL_in_eval;
430		402
431	c->curstackinfo = PL_curstackinfo;	403	c->curstackinfo = PL_curstackinfo;
432	c->curstack = PL_curstack;	404	c->curstack = PL_curstack;
433	c->mainstack = PL_mainstack;	405	c->mainstack = PL_mainstack;
434	c->stack_sp = PL_stack_sp;	406	c->stack_sp = PL_stack_sp;
435	c->op = PL_op;	407	c->op = PL_op;
436	c->curpad = PL_curpad;	408	c->curpad = PL_curpad;
		409	c->comppad = PL_comppad;
		410	c->compcv = PL_compcv;
437	c->stack_base = PL_stack_base;	411	c->stack_base = PL_stack_base;
438	c->stack_max = PL_stack_max;	412	c->stack_max = PL_stack_max;
439	c->tmps_stack = PL_tmps_stack;	413	c->tmps_stack = PL_tmps_stack;
440	c->tmps_floor = PL_tmps_floor;	414	c->tmps_floor = PL_tmps_floor;
441	c->tmps_ix = PL_tmps_ix;	415	c->tmps_ix = PL_tmps_ix;
…		…
447	c->scopestack_ix = PL_scopestack_ix;	421	c->scopestack_ix = PL_scopestack_ix;
448	c->scopestack_max = PL_scopestack_max;	422	c->scopestack_max = PL_scopestack_max;
449	c->savestack = PL_savestack;	423	c->savestack = PL_savestack;
450	c->savestack_ix = PL_savestack_ix;	424	c->savestack_ix = PL_savestack_ix;
451	c->savestack_max = PL_savestack_max;	425	c->savestack_max = PL_savestack_max;
		426	#if PERL_VERSION < 9
452	c->retstack = PL_retstack;	427	c->retstack = PL_retstack;
453	c->retstack_ix = PL_retstack_ix;	428	c->retstack_ix = PL_retstack_ix;
454	c->retstack_max = PL_retstack_max;	429	c->retstack_max = PL_retstack_max;
		430	#endif
		431	c->curpm = PL_curpm;
455	c->curcop = PL_curcop;	432	c->curcop = PL_curcop;
456	c->start_env = PL_start_env;
457	c->top_env = PL_top_env;	433	c->top_env = PL_top_env;
458	}	434	}
459		435
460	/*	436	/*
461	* allocate various perl stacks. This is an exact copy	437	* allocate various perl stacks. This is an exact copy
462	* of perl.c:init_stacks, except that it uses less memory	438	* of perl.c:init_stacks, except that it uses less memory
463	* on the assumption that coroutines do not usually need	439	* on the (sometimes correct) assumption that coroutines do
464	* a lot of stackspace.	440	* not usually need a lot of stackspace.
465	*/	441	*/
466	STATIC void	442	static void
467	coro_init_stacks (pTHX)	443	coro_init_stacks (pTHX)
468	{	444	{
		445	LOCK;
		446
469	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
470	PL_curstackinfo->si_type = PERLSI_MAIN;	448	PL_curstackinfo->si_type = PERLSI_MAIN;
471	PL_curstack = PL_curstackinfo->si_stack;	449	PL_curstack = PL_curstackinfo->si_stack;
472	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
473		451
…		…
482		460
483	New(54,PL_markstack,16,I32);	461	New(54,PL_markstack,16,I32);
484	PL_markstack_ptr = PL_markstack;	462	PL_markstack_ptr = PL_markstack;
485	PL_markstack_max = PL_markstack + 16;	463	PL_markstack_max = PL_markstack + 16;
486		464
		465	#ifdef SET_MARK_OFFSET
487	SET_MARK_OFFSET;	466	SET_MARK_OFFSET;
		467	#endif
488		468
489	New(54,PL_scopestack,16,I32);	469	New(54,PL_scopestack,16,I32);
490	PL_scopestack_ix = 0;	470	PL_scopestack_ix = 0;
491	PL_scopestack_max = 16;	471	PL_scopestack_max = 16;
492		472
493	New(54,PL_savestack,96,ANY);	473	New(54,PL_savestack,96,ANY);
494	PL_savestack_ix = 0;	474	PL_savestack_ix = 0;
495	PL_savestack_max = 96;	475	PL_savestack_max = 96;
496		476
		477	#if PERL_VERSION < 9
497	New(54,PL_retstack,8,OP*);	478	New(54,PL_retstack,8,OP*);
498	PL_retstack_ix = 0;	479	PL_retstack_ix = 0;
499	PL_retstack_max = 8;	480	PL_retstack_max = 8;
		481	#endif
		482
		483	UNLOCK;
500	}	484	}
501		485
502	/*	486	/*
503	* destroy the stacks, the callchain etc...	487	* destroy the stacks, the callchain etc...
504	* still there is a memleak of 128 bytes...
505	*/	488	*/
506	STATIC void	489	static void
507	destroy_stacks(pTHX)	490	destroy_stacks(pTHX)
508	{	491	{
		492	if (!IN_DESTRUCT)
		493	{
509	/* is this ugly, I ask? */	494	/* is this ugly, I ask? */
510	while (PL_scopestack_ix)	495	LEAVE_SCOPE (0);
511	LEAVE;
512		496
513	/* sure it is, but more important: is it correct?? :/ */	497	/* 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;	498	FREETMPS;
		499
		500	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
		501	}
516		502
517	while (PL_curstackinfo->si_next)	503	while (PL_curstackinfo->si_next)
518	PL_curstackinfo = PL_curstackinfo->si_next;	504	PL_curstackinfo = PL_curstackinfo->si_next;
519		505
520	while (PL_curstackinfo)	506	while (PL_curstackinfo)
521	{	507	{
522	PERL_SI *p = PL_curstackinfo->si_prev;	508	PERL_SI *p = PL_curstackinfo->si_prev;
523		509
524	{	510	{ /*D*//*remove*/
525	dSP;	511	dSP;
526	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	512	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527	PUTBACK; /* possibly superfluous */	513	PUTBACK; /* possibly superfluous */
528	}	514	}
529		515
530	dounwind(-1);	516	if (!IN_DESTRUCT)
531		517	{
		518	dounwind (-1);/*D*//*remove*/
532	SvREFCNT_dec(PL_curstackinfo->si_stack);	519	SvREFCNT_dec (PL_curstackinfo->si_stack);
		520	}
		521
533	Safefree(PL_curstackinfo->si_cxstack);	522	Safefree (PL_curstackinfo->si_cxstack);
534	Safefree(PL_curstackinfo);	523	Safefree (PL_curstackinfo);
535	PL_curstackinfo = p;	524	PL_curstackinfo = p;
536	}	525	}
537		526
538	Safefree(PL_tmps_stack);	527	Safefree (PL_tmps_stack);
539	Safefree(PL_markstack);	528	Safefree (PL_markstack);
540	Safefree(PL_scopestack);	529	Safefree (PL_scopestack);
541	Safefree(PL_savestack);	530	Safefree (PL_savestack);
		531	#if PERL_VERSION < 9
542	Safefree(PL_retstack);	532	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 */
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	533	#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	}	534	}
573		535
574	static void	536	static void
575	deallocate_stack (Coro__State ctx)	537	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	{	538	{
602	/*	539	/*
603	* emulate part of the perl startup here.	540	* emulate part of the perl startup here.
604	*/	541	*/
		542	dTHX;
605	dSP;	543	dSP;
606	Coro__State ctx = (Coro__State)arg;	544	UNOP myop;
607	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);	545	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
608		546
609	coro_init_stacks (aTHX);	547	coro_init_stacks (aTHX);
610	JMPENV_BOOTSTRAP;	548	/*PL_curcop = 0;*/
		549	/*PL_in_eval = PL_in_eval;*/ /* inherit */
		550	SvREFCNT_dec (GvAV (PL_defgv));
		551	GvAV (PL_defgv) = coro->args; coro->args = 0;
		552
611	SPAGAIN;	553	SPAGAIN;
612		554
613	/*PL_curcop = 0;*/	555	Zero (&myop, 1, UNOP);
614	SvREFCNT_dec (GvAV (PL_defgv));	556	myop.op_next = Nullop;
615	GvAV (PL_defgv) = ctx->args;	557	myop.op_flags = OPf_WANT_VOID;
616		558
617	if (ctx->stack)	559	PL_op = (OP *)&myop;
618	{
619	ctx->cursp = 0;
620		560
621	PUSHMARK(SP);	561	PUSHMARK(SP);
		562	XPUSHs (sub_init);
622	PUTBACK;	563	PUTBACK;
623	(void) call_sv (sub_init, G_VOID|G_NOARGS);	564	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
624	croak ("FATAL: CCTXT coroutine returned!");	565	SPAGAIN;
		566
		567	ENTER; /* necessary e.g. for dounwind */
		568	}
		569
		570	static void
		571	transfer_tail ()
		572	{
		573	if (coro_mortal)
		574	{
		575	SvREFCNT_dec (coro_mortal);
		576	coro_mortal = 0;
625	}	577	}
626	else
627	{
628	UNOP myop;
629		578
630	PL_op = (OP *)&myop;	579	UNLOCK;
631
632	Zero(&myop, 1, UNOP);
633	myop.op_next = Nullop;
634	myop.op_flags = OPf_WANT_VOID;
635
636	PUSHMARK(SP);
637	XPUSHs (sub_init);
638	/*
639	* the next line is slightly wrong, as PL_op->op_next
640	* is actually being executed so we skip the first op.
641	* that doesn't matter, though, since it is only
642	* pp_nextstate and we never return...
643	* ah yes, and I don't care anyways ;)
644	*/
645	PUTBACK;
646	PL_op = pp_entersub();
647	SPAGAIN;
648
649	ENTER; /* necessary e.g. for dounwind */
650	}
651	}	580	}
652		581
653	static void	582	static void
654	continue_coro (void *arg)	583	coro_run (void *arg)
655	{	584	{
656	/*	585	/*
657	* this is a _very_ stripped down perl interpreter ;)	586	* this is a _very_ stripped down perl interpreter ;)
658	*/	587	*/
659	Coro__State ctx = (Coro__State)arg;	588	dTHX;
660		589
661	ctx->cursp = 0;	590	transfer_tail ();
		591
		592	PL_top_env = &PL_start_env;
662	PL_op = PL_op->op_next;	593	PL_restartop = PL_op->op_next;
663	CALLRUNOPS(aTHX);	594	/* somebody will hit me for both perl_run and PL_restart_top */
664	/*NORETURN*/	595	perl_run (aTHX_ PERL_GET_CONTEXT);
		596
665	abort ();	597	abort ();
666	}	598	}
667		599
668	STATIC void	600	static coro_stack *
		601	stack_new ()
		602	{
		603	coro_stack *stack;
		604
		605	New (0, stack, 1, coro_stack);
		606
		607	#if HAVE_MMAP
		608
		609	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
		610	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		611
		612	if (stack->sptr == (void *)-1)
		613	{
		614	fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n");
		615	_exit (EXIT_FAILURE);
		616	}
		617
		618	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		619
		620	#else
		621
		622	stack->ssize = STACKSIZE * (long)sizeof (long);
		623	New (0, stack->sptr, STACKSIZE, long);
		624
		625	if (!stack->sptr)
		626	{
		627	fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");
		628	_exit (EXIT_FAILURE);
		629	}
		630
		631	#endif
		632
		633	coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize);
		634
		635	return stack;
		636	}
		637
		638	static void
		639	stack_free (coro_stack *stack)
		640	{
		641	if (!stack || stack == main_stack)
		642	return;
		643
		644	#if HAVE_MMAP
		645	munmap (stack->sptr, stack->ssize);
		646	#else
		647	Safefree (stack->sptr);
		648	#endif
		649
		650	Safefree (stack);
		651	}
		652
		653	static coro_stack *stack_first;
		654
		655	static void
		656	stack_get (struct coro *coro)
		657	{
		658	if (stack_first)
		659	{
		660	coro->stack = stack_first;
		661	stack_first = stack_first->next;
		662	}
		663	else
		664	coro->stack = stack_new ();
		665	}
		666
		667	static void
		668	stack_put (coro_stack *stack)
		669	{
		670	stack->next = stack_first;
		671	stack_first = stack;
		672	}
		673
		674	/* never call directly, always through the coro_state_transfer global variable */
		675	static void
669	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	676	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
670	{	677	{
671	dSP;
672	dSTACKLEVEL;	678	dSTACKLEVEL;
673		679
		680	/* sometimes transfer is only called to set idle_sp */
		681	if (!prev->stack->idle_sp)
		682	prev->stack->idle_sp = stacklevel;
		683
		684	LOCK;
		685
674	if (prev != next)	686	if (prev != next)
675	{	687	{
		688	coro_stack *prev_stack = prev->stack;
		689
		690	/* possibly "free" the stack */
		691	if (prev_stack->idle_sp == stacklevel)
		692	{
		693	stack_put (prev_stack);
		694	prev->stack = 0;
		695	}
		696
676	if (next->mainstack)	697	if (!next->mainstack)
		698	{
		699	/* first get rid of the old state */
		700	SAVE (prev, -1);
		701	/* setup coroutine call */
		702	setup_coro (next);
		703	next->stack = 0;
		704	}
		705	else
677	{	706	{
678	SAVE (prev, flags);	707	SAVE (prev, flags);
679	LOAD (next);	708	LOAD (next);
680
681	/* mark this state as in-use */
682	next->mainstack = 0;
683	next->tmps_ix = -2;
684
685	/* stacklevel changed? if yes, grab the stack for us! */
686	if (flags & TRANSFER_SAVE_CCTXT)
687	{
688	if (!prev->stack)
689	allocate_stack (prev, 0);
690	else if (prev->cursp != stacklevel
691	&& prev->stack->usecnt > 1)
692	{
693	prev->gencnt = ++prev->stack->gencnt;
694	prev->stack->usecnt = 1;
695	}
696
697	/* has our stack been invalidated? */
698	if (next->stack && next->stack->gencnt != next->gencnt)
699	{
700	deallocate_stack (next);
701	allocate_stack (next, 1);
702	coro_create (&(next->stack->cctx),
703	continue_coro, (void *)next,
704	next->stack->sptr, labs (next->stack->ssize));
705	}
706
707	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
708	}
709
710	}	709	}
711	else if (next->tmps_ix == -2)
712	croak ("tried to transfer to running coroutine");
713	else
714	{
715	SAVE (prev, -1); /* first get rid of the old state */
716		710
717	if (flags & TRANSFER_SAVE_CCTXT)	711	if (!next->stack)
718	{	712	stack_get (next);
719	if (!prev->stack)
720	allocate_stack (prev, 0);
721		713
722	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)	714	if (prev_stack != next->stack)
723	{
724	setup_coro (next);
725
726	prev->stack->refcnt++;
727	prev->stack->usecnt++;
728	next->stack = prev->stack;
729	next->gencnt = prev->gencnt;
730	}
731	else
732	{
733	allocate_stack (next, 1);
734	coro_create (&(next->stack->cctx),
735	setup_coro, (void *)next,
736	next->stack->sptr, labs (next->stack->ssize));
737	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));	715	coro_transfer (&prev_stack->cctx, &next->stack->cctx);
738	}
739	}
740	else
741	setup_coro (next);
742	}
743	}	716	}
744		717
745	next->cursp = stacklevel;	718	transfer_tail ();
		719	}
		720
		721	/* use this function pointer to call the above function */
		722	/* this is done to increase chances of the compiler not inlining the call */
		723	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
		724
		725	static void
		726	coro_state_destroy (struct coro *coro)
		727	{
		728	if (coro->refcnt--)
		729	return;
		730
		731	if (coro->mainstack && coro->mainstack != main_mainstack)
		732	{
		733	struct coro temp;
		734
		735	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
		736	LOAD (aTHX_ coro);
		737
		738	destroy_stacks (aTHX);
		739
		740	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		741
		742	coro->mainstack = 0;
		743	}
		744
		745	stack_free (coro->stack);
		746	SvREFCNT_dec (coro->args);
		747	Safefree (coro);
		748	}
		749
		750	static int
		751	coro_state_clear (SV *sv, MAGIC *mg)
		752	{
		753	struct coro *coro = (struct coro *)mg->mg_ptr;
		754	mg->mg_ptr = 0;
		755
		756	coro_state_destroy (coro);
		757
		758	return 0;
		759	}
		760
		761	static int
		762	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)
		763	{
		764	struct coro *coro = (struct coro *)mg->mg_ptr;
		765
		766	++coro->refcnt;
		767
		768	return 0;
		769	}
		770
		771	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
		772
		773	static struct coro *
		774	SvSTATE (SV *coro)
		775	{
		776	HV *stash;
		777	MAGIC *mg;
		778
		779	if (SvROK (coro))
		780	coro = SvRV (coro);
		781
		782	stash = SvSTASH (coro);
		783	if (stash != coro_stash && stash != coro_state_stash)
		784	{
		785	/* very slow, but rare, check */
		786	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		787	croak ("Coro::State object required");
		788	}
		789
		790	mg = SvMAGIC (coro);
		791	assert (mg->mg_type == PERL_MAGIC_ext);
		792	return (struct coro *)mg->mg_ptr;
		793	}
		794
		795	static void
		796	api_transfer (pTHX_ SV *prev, SV *next, int flags)
		797	{
		798	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
		799	}
		800
		801	/** Coro ********************************************************************/
		802
		803	#define PRIO_MAX 3
		804	#define PRIO_HIGH 1
		805	#define PRIO_NORMAL 0
		806	#define PRIO_LOW -1
		807	#define PRIO_IDLE -3
		808	#define PRIO_MIN -4
		809
		810	/* for Coro.pm */
		811	static GV *coro_current, *coro_idle;
		812	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		813	static int coro_nready;
		814
		815	static void
		816	coro_enq (pTHX_ SV *sv)
		817	{
		818	int prio;
		819
		820	if (SvTYPE (sv) != SVt_PVHV)
		821	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		822
		823	prio = SvSTATE (sv)->prio;
		824
		825	av_push (coro_ready [prio - PRIO_MIN], sv);
		826	coro_nready++;
		827	}
		828
		829	static SV *
		830	coro_deq (pTHX_ int min_prio)
		831	{
		832	int prio = PRIO_MAX - PRIO_MIN;
		833
		834	min_prio -= PRIO_MIN;
		835	if (min_prio < 0)
		836	min_prio = 0;
		837
		838	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		839	if (AvFILLp (coro_ready [prio]) >= 0)
		840	{
		841	coro_nready--;
		842	return av_shift (coro_ready [prio]);
		843	}
		844
		845	return 0;
		846	}
		847
		848	static void
		849	api_ready (SV *coro)
		850	{
		851	dTHX;
		852
		853	if (SvROK (coro))
		854	coro = SvRV (coro);
		855
		856	LOCK;
		857	coro_enq (aTHX_ SvREFCNT_inc (coro));
		858	UNLOCK;
		859	}
		860
		861	static void
		862	api_schedule (void)
		863	{
		864	dTHX;
		865
		866	SV *prev, *next;
		867	SV *current = GvSV (coro_current);
		868
		869	for (;;)
		870	{
		871	LOCK;
		872
		873	next = coro_deq (aTHX_ PRIO_MIN);
		874
		875	if (next)
		876	break;
		877
		878	UNLOCK;
		879
		880	{
		881	dSP;
		882
		883	ENTER;
		884	SAVETMPS;
		885
		886	PUSHMARK (SP);
		887	PUTBACK;
		888	call_sv (GvSV (coro_idle), G_DISCARD);
		889
		890	FREETMPS;
		891	LEAVE;
		892	}
		893	}
		894
		895	prev = SvRV (current);
		896	SvRV (current) = next;
		897
		898	/* free this only after the transfer */
		899	coro_mortal = prev;
		900
		901	UNLOCK;
		902
		903	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);
		904	}
		905
		906	static int coro_cede_self;
		907
		908	static void
		909	api_cede (void)
		910	{
		911	dTHX;
		912	SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));
		913
		914	LOCK;
		915
		916	if (coro_cede_self)
		917	{
		918	AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN];
		919	av_unshift (runqueue, 1);
		920	av_store (runqueue, 0, current);
		921	coro_nready++;
		922	coro_cede_self = 0;
		923	}
		924	else
		925	coro_enq (aTHX_ current);
		926
		927	UNLOCK;
		928
		929	api_schedule ();
746	}	930	}
747		931
748	MODULE = Coro::State PACKAGE = Coro::State	932	MODULE = Coro::State PACKAGE = Coro::State
749		933
750	PROTOTYPES: ENABLE	934	PROTOTYPES: DISABLE
751		935
752	BOOT:	936	BOOT:
753	{ /* {} necessary for stoopid perl-5.6.x */	937	{
754	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	938	#ifdef USE_ITHREADS
755	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	939	MUTEX_INIT (&coro_mutex);
		940	#endif
		941	BOOT_PAGESIZE;
		942
756	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	943	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
757		944
758	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	945	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
759	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	946	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
760	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	947	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
761	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
762
763	if (!padlist_cache)
764	padlist_cache = newHV ();
765		948
766	main_mainstack = PL_mainstack;	949	main_mainstack = PL_mainstack;
767	}
768		950
769	Coro::State	951	coroapi.ver = CORO_API_VERSION;
770	_newprocess(args)	952	coroapi.transfer = api_transfer;
771	SV * args	953
772	PROTOTYPE: $	954	Newz (0, main_stack, 1, coro_stack);
		955	main_stack->idle_sp = (void *)-1;
		956
		957	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		958	}
		959
		960	SV *
		961	new (char *klass, ...)
773	CODE:	962	CODE:
774	Coro__State coro;	963	{
		964	struct coro *coro;
		965	HV *hv;
		966	int i;
775		967
776	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
777	croak ("Coro::State::_newprocess expects an arrayref");
778
779	New (0, coro, 1, struct coro);	968	Newz (0, coro, 1, struct coro);
		969	coro->args = newAV ();
780		970
781	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	971	hv = newHV ();
		972	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		973	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		974
		975	av_push (coro->args, newSVsv (RETVAL));
		976	for (i = 1; i < items; i++)
		977	av_push (coro->args, newSVsv (ST (i)));
		978
		979	coro->stack = main_stack;
782	coro->mainstack = 0; /* actual work is done inside transfer */	980	/*coro->mainstack = 0; *//*actual work is done inside transfer */
783	coro->stack = 0;	981	/*coro->stack = 0;*/
784		982	}
785	RETVAL = coro;
786	OUTPUT:	983	OUTPUT:
787	RETVAL	984	RETVAL
788		985
789	void	986	void
790	transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK)	987	transfer (prev, next, flags)
791	Coro::State_or_hashref prev	988	SV *prev
792	Coro::State_or_hashref next	989	SV *next
793	int flags	990	int flags
794	PROTOTYPE: @
795	CODE:	991	CODE:
796	transfer (aTHX_ prev, next, flags);	992	PUTBACK;
		993	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
		994	SPAGAIN;
		995
		996	int
		997	prio (Coro::State coro, int newprio = 0)
		998	ALIAS:
		999	nice = 1
		1000	CODE:
		1001	{
		1002	RETVAL = coro->prio;
		1003
		1004	if (items > 1)
		1005	{
		1006	if (ix)
		1007	newprio += coro->prio;
		1008
		1009	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1010	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1011
		1012	coro->prio = newprio;
		1013	}
		1014	}
797		1015
798	void	1016	void
799	DESTROY(coro)	1017	_clear_idle_sp (Coro::State self)
800	Coro::State coro	1018	CODE:
801	CODE:	1019	self->stack->idle_sp = 0;
802
803	if (coro->mainstack && coro->mainstack != main_mainstack)
804	{
805	struct coro temp;
806
807	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
808	LOAD(aTHX_ coro);
809
810	destroy_stacks (aTHX);
811
812	LOAD((&temp)); /* this will get rid of defsv etc.. */
813
814	coro->mainstack = 0;
815	}
816
817	deallocate_stack (coro);
818
819	Safefree (coro);
820		1020
821	void	1021	void
822	flush()	1022	_clone_state_from (SV *dst, SV *src)
823	CODE:	1023	CODE:
824	#ifdef MAY_FLUSH	1024	{
825	flush_padlist_cache ();	1025	struct coro *coro_src = SvSTATE (src);
826	#endif	1026
		1027	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
		1028
		1029	++coro_src->refcnt;
		1030	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
		1031	}
		1032
		1033	void
		1034	_exit (code)
		1035	int code
		1036	PROTOTYPE: $
		1037	CODE:
		1038	_exit (code);
827		1039
828	MODULE = Coro::State PACKAGE = Coro::Cont	1040	MODULE = Coro::State PACKAGE = Coro::Cont
829		1041
830	# this is slightly dirty
831
832	void	1042	void
833	yield(...)	1043	yield (...)
834	PROTOTYPE: @	1044	PROTOTYPE: @
835	CODE:	1045	CODE:
836	static SV *returnstk;	1046	{
		1047	SV *yieldstack;
837	SV *sv;	1048	SV *sv;
838	AV *defav = GvAV (PL_defgv);	1049	AV *defav = GvAV (PL_defgv);
839	struct coro *prev, *next;	1050	struct coro *prev, *next;
840		1051
841	if (!returnstk)	1052	yieldstack = *hv_fetch (
842	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	1053	(HV *)SvRV (GvSV (coro_current)),
		1054	"yieldstack", sizeof ("yieldstack") - 1,
		1055	0
		1056	);
843		1057
844	/* set up @_ -- ugly */	1058	/* set up @_ -- ugly */
845	av_clear (defav);	1059	av_clear (defav);
846	av_fill (defav, items - 1);	1060	av_fill (defav, items - 1);
847	while (items--)	1061	while (items--)
848	av_store (defav, items, SvREFCNT_inc (ST(items)));	1062	av_store (defav, items, SvREFCNT_inc (ST(items)));
849		1063
850	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
851	sv = av_pop ((AV *)SvRV (returnstk));	1064	sv = av_pop ((AV *)SvRV (yieldstack));
852	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));	1065	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
853	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));	1066	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
854	SvREFCNT_dec (sv);	1067	SvREFCNT_dec (sv);
855		1068
856	transfer(aTHX_ prev, next, 0);	1069	coro_state_transfer (aTHX_ prev, next, 0);
		1070	}
857		1071
		1072	MODULE = Coro::State PACKAGE = Coro
		1073
		1074	BOOT:
		1075	{
		1076	int i;
		1077
		1078	coro_stash = gv_stashpv ("Coro", TRUE);
		1079
		1080	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1081	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1082	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1083	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1084	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1085	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1086
		1087	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1088	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1089
		1090	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1091	coro_ready[i] = newAV ();
		1092
		1093	{
		1094	SV *sv = perl_get_sv("Coro::API", 1);
		1095
		1096	coroapi.schedule = api_schedule;
		1097	coroapi.cede = api_cede;
		1098	coroapi.ready = api_ready;
		1099	coroapi.nready = &coro_nready;
		1100	coroapi.current = coro_current;
		1101
		1102	GCoroAPI = &coroapi;
		1103	sv_setiv (sv, (IV)&coroapi);
		1104	SvREADONLY_on (sv);
		1105	}
		1106	}
		1107
		1108	void
		1109	ready (SV *self)
		1110	PROTOTYPE: $
		1111	CODE:
		1112	api_ready (self);
		1113
		1114	int
		1115	nready (...)
		1116	PROTOTYPE:
		1117	CODE:
		1118	RETVAL = coro_nready;
		1119	OUTPUT:
		1120	RETVAL
		1121
		1122	void
		1123	schedule (...)
		1124	PROTOTYPE:
		1125	CODE:
		1126	api_schedule ();
		1127
		1128	void
		1129	_set_cede_self ()
		1130	CODE:
		1131	coro_cede_self = 1;
		1132
		1133	void
		1134	cede (...)
		1135	PROTOTYPE:
		1136	CODE:
		1137	api_cede ();
		1138
		1139	MODULE = Coro::State PACKAGE = Coro::AIO
		1140
		1141	SV *
		1142	_get_state ()
		1143	CODE:
		1144	{
		1145	struct {
		1146	int errorno;
		1147	int laststype;
		1148	int laststatval;
		1149	Stat_t statcache;
		1150	} data;
		1151
		1152	data.errorno = errno;
		1153	data.laststype = PL_laststype;
		1154	data.laststatval = PL_laststatval;
		1155	data.statcache = PL_statcache;
		1156
		1157	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1158	}
		1159	OUTPUT:
		1160	RETVAL
		1161
		1162	void
		1163	_set_state (char *data_)
		1164	PROTOTYPE: $
		1165	CODE:
		1166	{
		1167	struct {
		1168	int errorno;
		1169	int laststype;
		1170	int laststatval;
		1171	Stat_t statcache;
		1172	} *data = (void *)data_;
		1173
		1174	errno = data->errorno;
		1175	PL_laststype = data->laststype;
		1176	PL_laststatval = data->laststatval;
		1177	PL_statcache = data->statcache;
		1178	}

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