ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.18 by root, Thu Jul 26 03:46:15 2001 UTC vs.
Revision 1.106 by root, Mon Nov 27 02:08:55 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"
		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
		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
6		50
7	#ifdef HAVE_MMAP	51	#ifdef HAVE_MMAP
8	# include <unistd.h>	52	# include <unistd.h>
9	# include <sys/mman.h>	53	# include <sys/mman.h>
10	# ifndef MAP_ANON
11	# ifdef MAP_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
12	# define MAP_ANON MAP_ANONYMOUS	55	# ifdef MAP_ANON
		56	# define MAP_ANONYMOUS MAP_ANON
13	# else	57	# else
14	# undef HAVE_MMAP	58	# undef HAVE_MMAP
15	# endif	59	# endif
16	# endif	60	# endif
		61	# include <limits.h>
		62	# ifndef PAGESIZE
		63	# define PAGESIZE pagesize
		64	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		65	static long pagesize;
		66	# else
		67	# define BOOT_PAGESIZE (void)0
17	#endif	68	# 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	69	#else
30	# define TRANSFER_LAZY_STACK 0x00000000	70	# define PAGESIZE 0
		71	# define BOOT_PAGESIZE (void)0
31	#endif	72	#endif
32		73
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"
37	#define UCORO_STATE "_coro_state"
38
39	/* The next macro should delcare a variable stacklevel that contains and approximation	74	/* 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	75	* to the current C stack pointer. Its property is that it changes with each call
41	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
42	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
43		79
44	#define labs(l) ((l) >= 0 ? (l) : -(l))	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
45		81
46	/* this is actually not only the c stack but also c registers etc... */	82	#if __GNUC__ >= 3
		83	# define attribute(x) __attribute__(x)
		84	#else
		85	# define attribute(x)
		86	#endif
		87
		88	#define NOINLINE attribute ((noinline))
		89
		90	#include "CoroAPI.h"
		91
		92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
		93
		94	#ifdef USE_ITHREADS
		95	static perl_mutex coro_mutex;
		96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		98	#else
		99	# define LOCK (void)0
		100	# define UNLOCK (void)0
		101	#endif
		102
		103	static struct CoroAPI coroapi;
		104	static AV *main_mainstack; /* used to differentiate between $main and others */
		105	static HV *coro_state_stash, *coro_stash;
		106	static SV *coro_mortal; /* will be freed after next transfer */
		107
		108	/* this is a structure representing a c-level coroutine */
47	typedef struct {	109	typedef struct coro_cctx {
48	int refcnt; /* pointer reference counter */	110	struct coro_cctx *next;
49	int usecnt; /* shared by how many coroutines */
50	int gencnt; /* generation counter */
51		111
52	coro_context cctx;	112	/* the stack */
53
54	void *sptr;	113	void *sptr;
55	long ssize; /* positive == mmap, otherwise malloc */	114	long ssize; /* positive == mmap, otherwise malloc */
56	} coro_stack;
57		115
		116	/* cpu state */
		117	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		118	JMPENV *top_env;
		119	coro_context cctx;
		120
		121	#if USE_VALGRIND
		122	int valgrind_id;
		123	#endif
		124	} coro_cctx;
		125
		126	/* this is a structure representing a perl-level coroutine */
58	struct coro {	127	struct coro {
59	/* the optional C context */	128	/* the c coroutine allocated to this perl coroutine, if any */
60	coro_stack *stack;	129	coro_cctx *cctx;
61	void *cursp;	130
		131	/* data associated with this coroutine (initial args) */
		132	AV *args;
62	int gencnt;	133	int refcnt;
63		134
64	/* optionally saved, might be zero */	135	/* optionally saved, might be zero */
65	AV *defav;	136	AV *defav;
66	SV *defsv;	137	SV *defsv;
67	SV *errsv;	138	SV *errsv;
68		139
69	/* saved global state not related to stacks */	140	/* saved global state not related to stacks */
70	U8 dowarn;	141	U8 dowarn;
		142	I32 in_eval;
71		143
72	/* the stacks and related info (callchain etc..) */	144	/* the stacks and related info (callchain etc..) */
73	PERL_SI *curstackinfo;	145	PERL_SI *curstackinfo;
74	AV *curstack;	146	AV *curstack;
75	AV *mainstack;	147	AV *mainstack;
76	SV **stack_sp;	148	SV **stack_sp;
77	OP *op;	149	OP *op;
78	SV **curpad;	150	SV **curpad;
		151	AV *comppad;
		152	CV *compcv;
79	SV **stack_base;	153	SV **stack_base;
80	SV **stack_max;	154	SV **stack_max;
81	SV **tmps_stack;	155	SV **tmps_stack;
82	I32 tmps_floor;	156	I32 tmps_floor;
83	I32 tmps_ix;	157	I32 tmps_ix;
…		…
92	I32 savestack_ix;	166	I32 savestack_ix;
93	I32 savestack_max;	167	I32 savestack_max;
94	OP **retstack;	168	OP **retstack;
95	I32 retstack_ix;	169	I32 retstack_ix;
96	I32 retstack_max;	170	I32 retstack_max;
		171	PMOP *curpm;
97	COP *curcop;	172	COP *curcop;
98	JMPENV start_env;
99	JMPENV *top_env;
100		173
101	/* data associated with this coroutine (initial args) */	174	/* coro process data */
102	AV *args;	175	int prio;
103	};	176	};
104		177
105	typedef struct coro *Coro__State;	178	typedef struct coro *Coro__State;
106	typedef struct coro *Coro__State_or_hashref;	179	typedef struct coro *Coro__State_or_hashref;
107		180
108	static AV *main_mainstack; /* used to differentiate between $main and others */	181	static AV *
109	static HV *coro_state_stash;	182	coro_clone_padlist (CV *cv)
110	static SV *ucoro_state_sv;
111	static U32 ucoro_state_hash;
112	static HV *padlist_cache;
113
114	/* mostly copied from op.c:cv_clone2 */
115	STATIC AV *
116	clone_padlist (AV *protopadlist)
117	{	183	{
118	AV *av;	184	AV *padlist = CvPADLIST (cv);
119	I32 ix;
120	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
121	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
122	SV **pname = AvARRAY (protopad_name);
123	SV **ppad = AvARRAY (protopad);
124	I32 fname = AvFILLp (protopad_name);
125	I32 fpad = AvFILLp (protopad);
126	AV *newpadlist, *newpad_name, *newpad;	185	AV *newpadlist, *newpad;
127	SV **npad;
128
129	newpad_name = newAV ();
130	for (ix = fname; ix >= 0; ix--)
131	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
132
133	newpad = newAV ();
134	av_fill (newpad, AvFILLp (protopad));
135	npad = AvARRAY (newpad);
136		186
137	newpadlist = newAV ();	187	newpadlist = newAV ();
138	AvREAL_off (newpadlist);	188	AvREAL_off (newpadlist);
139	av_store (newpadlist, 0, (SV *) newpad_name);	189	#if PERL_VERSION_ATLEAST (5,9,0)
		190	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		191	#else
		192	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		193	#endif
		194	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		195	--AvFILLp (padlist);
		196
		197	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
140	av_store (newpadlist, 1, (SV *) newpad);	198	av_store (newpadlist, 1, (SV *)newpad);
141		199
142	av = newAV (); /* will be @_ */	200	return newpadlist;
143	av_extend (av, 0);	201	}
144	av_store (newpad, 0, (SV *) av);
145	AvFLAGS (av) = AVf_REIFY;
146		202
147	for (ix = fpad; ix > 0; ix--)	203	static void
		204	free_padlist (AV *padlist)
		205	{
		206	/* may be during global destruction */
		207	if (SvREFCNT (padlist))
148	{	208	{
149	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	209	I32 i = AvFILLp (padlist);
150	if (namesv && namesv != &PL_sv_undef)	210	while (i >= 0)
151	{	211	{
152	char *name = SvPVX (namesv); /* XXX */	212	SV **svp = av_fetch (padlist, i--, FALSE);
153	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	213	if (svp)
154	{ /* lexical from outside? */
155	npad[ix] = SvREFCNT_inc (ppad[ix]);
156	}	214	{
157	else
158	{ /* our own lexical */
159	SV *sv;	215	SV *sv;
160	if (*name == '&')	216	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
161	sv = SvREFCNT_inc (ppad[ix]);	217	SvREFCNT_dec (sv);
162	else if (*name == '@')	218
163	sv = (SV *) newAV ();	219	SvREFCNT_dec (*svp);
164	else if (*name == '%')
165	sv = (SV *) newHV ();
166	else
167	sv = NEWSV (0, 0);
168	if (!SvPADBUSY (sv))
169	SvPADMY_on (sv);
170	npad[ix] = sv;
171	}	220	}
172	}	221	}
173	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	222
174	{	223	SvREFCNT_dec ((SV*)padlist);
175	npad[ix] = SvREFCNT_inc (ppad[ix]);
176	}
177	else
178	{
179	SV *sv = NEWSV (0, 0);
180	SvPADTMP_on (sv);
181	npad[ix] = sv;
182	}
183	}	224	}
		225	}
184		226
185	#if 0 /* return -ENOTUNDERSTOOD */	227	static int
186	/* Now that vars are all in place, clone nested closures. */	228	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		229	{
		230	AV *padlist;
		231	AV *av = (AV *)mg->mg_obj;
187		232
188	for (ix = fpad; ix > 0; ix--) {	233	/* casting is fun. */
189	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	234	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
190	if (namesv	235	free_padlist (padlist);
191	&& namesv != &PL_sv_undef	236
192	&& !(SvFLAGS(namesv) & SVf_FAKE)	237	SvREFCNT_dec (av);
193	&& *SvPVX(namesv) == '&'	238
194	&& CvCLONE(ppad[ix]))	239	return 0;
195	{	240	}
196	CV *kid = cv_clone((CV*)ppad[ix]);	241
197	SvREFCNT_dec(ppad[ix]);	242	#define PERL_MAGIC_coro PERL_MAGIC_ext
198	CvCLONE_on(kid);	243
199	SvPADMY_on(kid);	244	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
200	npad[ix] = (SV*)kid;	245
201	}	246	/* the next two functions merely cache the padlists */
		247	static void
		248	get_padlist (CV *cv)
		249	{
		250	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		251
		252	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
		253	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
		254	else
		255	{
		256	#if 0
		257	/* this is probably cleaner, but also slower? */
		258	CV *cp = Perl_cv_clone (cv);
		259	CvPADLIST (cv) = CvPADLIST (cp);
		260	CvPADLIST (cp) = 0;
		261	SvREFCNT_dec (cp);
		262	#else
		263	CvPADLIST (cv) = coro_clone_padlist (cv);
		264	#endif
		265	}
		266	}
		267
		268	static void
		269	put_padlist (CV *cv)
		270	{
		271	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		272
		273	if (!mg)
		274	{
		275	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		276	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		277	mg->mg_virtual = &vtbl_coro;
		278	mg->mg_obj = (SV *)newAV ();
202	}	279	}
203	#endif
204		280
205	return newpadlist;
206	}
207
208	#ifdef MAY_FLUSH
209	STATIC AV *
210	free_padlist (AV *padlist)
211	{
212	/* may be during global destruction */
213	if (SvREFCNT(padlist))
214	{
215	I32 i = AvFILLp(padlist);
216	while (i >= 0)
217	{
218	SV **svp = av_fetch(padlist, i--, FALSE);
219	SV *sv = svp ? *svp : Nullsv;
220	if (sv)
221	SvREFCNT_dec(sv);
222	}
223
224	SvREFCNT_dec((SV*)padlist);
225	}
226	}
227	#endif
228
229	/* the next two functions merely cache the padlists */
230	STATIC void
231	get_padlist (CV *cv)
232	{
233	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
234
235	if (he && AvFILLp ((AV *)*he) >= 0)
236	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
237	else
238	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
239	}
240
241	STATIC void
242	put_padlist (CV *cv)
243	{
244	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
245
246	if (SvTYPE (*he) != SVt_PVAV)
247	{
248	SvREFCNT_dec (*he);
249	*he = (SV *)newAV ();
250	}
251
252	av_push ((AV *)*he, (SV *)CvPADLIST (cv));	281	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
253	}	282	}
254
255	#ifdef MAY_FLUSH
256	STATIC void
257	flush_padlist_cache ()
258	{
259	HV *hv = padlist_cache;
260	padlist_cache = newHV ();
261
262	if (hv_iterinit (hv))
263	{
264	HE *he;
265	AV *padlist;
266
267	while (!!(he = hv_iternext (hv)))
268	{
269	AV *av = (AV *)HeVAL(he);
270
271	/* casting is fun. */
272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
273	free_padlist (padlist);
274	}
275	}
276
277	SvREFCNT_dec (hv);
278	}
279	#endif
280		283
281	#define SB do {	284	#define SB do {
282	#define SE } while (0)	285	#define SE } while (0)
283		286
284	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	287	#define LOAD(state) load_state((state));
285	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	288	#define SAVE(state,flags) save_state((state),(flags));
286		289
287	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	290	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
288		291
289	static void	292	static void
290	load_state(pTHX_ Coro__State c)	293	load_state(Coro__State c)
291	{	294	{
292	PL_dowarn = c->dowarn;	295	PL_dowarn = c->dowarn;
		296	PL_in_eval = c->in_eval;
293		297
294	PL_curstackinfo = c->curstackinfo;	298	PL_curstackinfo = c->curstackinfo;
295	PL_curstack = c->curstack;	299	PL_curstack = c->curstack;
296	PL_mainstack = c->mainstack;	300	PL_mainstack = c->mainstack;
297	PL_stack_sp = c->stack_sp;	301	PL_stack_sp = c->stack_sp;
298	PL_op = c->op;	302	PL_op = c->op;
299	PL_curpad = c->curpad;	303	PL_curpad = c->curpad;
		304	PL_comppad = c->comppad;
		305	PL_compcv = c->compcv;
300	PL_stack_base = c->stack_base;	306	PL_stack_base = c->stack_base;
301	PL_stack_max = c->stack_max;	307	PL_stack_max = c->stack_max;
302	PL_tmps_stack = c->tmps_stack;	308	PL_tmps_stack = c->tmps_stack;
303	PL_tmps_floor = c->tmps_floor;	309	PL_tmps_floor = c->tmps_floor;
304	PL_tmps_ix = c->tmps_ix;	310	PL_tmps_ix = c->tmps_ix;
…		…
310	PL_scopestack_ix = c->scopestack_ix;	316	PL_scopestack_ix = c->scopestack_ix;
311	PL_scopestack_max = c->scopestack_max;	317	PL_scopestack_max = c->scopestack_max;
312	PL_savestack = c->savestack;	318	PL_savestack = c->savestack;
313	PL_savestack_ix = c->savestack_ix;	319	PL_savestack_ix = c->savestack_ix;
314	PL_savestack_max = c->savestack_max;	320	PL_savestack_max = c->savestack_max;
		321	#if !PERL_VERSION_ATLEAST (5,9,0)
315	PL_retstack = c->retstack;	322	PL_retstack = c->retstack;
316	PL_retstack_ix = c->retstack_ix;	323	PL_retstack_ix = c->retstack_ix;
317	PL_retstack_max = c->retstack_max;	324	PL_retstack_max = c->retstack_max;
		325	#endif
		326	PL_curpm = c->curpm;
318	PL_curcop = c->curcop;	327	PL_curcop = c->curcop;
319	PL_start_env = c->start_env;
320	PL_top_env = c->top_env;
321		328
322	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	329	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
323	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	330	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
324	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	331	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
325		332
…		…
334		341
335	if (padlist)	342	if (padlist)
336	{	343	{
337	put_padlist (cv); /* mark this padlist as available */	344	put_padlist (cv); /* mark this padlist as available */
338	CvPADLIST(cv) = padlist;	345	CvPADLIST(cv) = padlist;
339	#ifdef USE_THREADS
340	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
341	#endif
342	}	346	}
343		347
344	++CvDEPTH(cv);	348	++CvDEPTH(cv);
345	}	349	}
346		350
347	PUTBACK;	351	PUTBACK;
348	}	352	}
349	}	353	}
350		354
351	static void	355	static void
352	save_state(pTHX_ Coro__State c, int flags)	356	save_state(Coro__State c, int flags)
353	{	357	{
354	{	358	{
355	dSP;	359	dSP;
356	I32 cxix = cxstack_ix;	360	I32 cxix = cxstack_ix;
357	PERL_CONTEXT *ccstk = cxstack;	361	PERL_CONTEXT *ccstk = cxstack;
…		…
364		368
365	PUSHs (Nullsv);	369	PUSHs (Nullsv);
366	/* this loop was inspired by pp_caller */	370	/* this loop was inspired by pp_caller */
367	for (;;)	371	for (;;)
368	{	372	{
369	do	373	while (cxix >= 0)
370	{	374	{
371	PERL_CONTEXT *cx = &ccstk[cxix--];	375	PERL_CONTEXT *cx = &ccstk[cxix--];
372		376
373	if (CxTYPE(cx) == CXt_SUB)	377	if (CxTYPE(cx) == CXt_SUB)
374	{	378	{
375	CV *cv = cx->blk_sub.cv;	379	CV *cv = cx->blk_sub.cv;
376	if (CvDEPTH(cv))	380	if (CvDEPTH(cv))
377	{	381	{
378	#ifdef USE_THREADS
379	/*XPUSHs ((SV *)CvOWNER(cv));*/
380	/*CvOWNER(cv) = 0;*/
381	/*error must unlock this cv etc.. etc...*/
382	#endif
383	EXTEND (SP, CvDEPTH(cv)*2);	382	EXTEND (SP, CvDEPTH(cv)*2);
384		383
385	while (--CvDEPTH(cv))	384	while (--CvDEPTH(cv))
386	{	385	{
387	/* this tells the restore code to increment CvDEPTH */	386	/* this tells the restore code to increment CvDEPTH */
…		…
390	}	389	}
391		390
392	PUSHs ((SV *)CvPADLIST(cv));	391	PUSHs ((SV *)CvPADLIST(cv));
393	PUSHs ((SV *)cv);	392	PUSHs ((SV *)cv);
394		393
395	get_padlist (cv); /* this is a monster */	394	get_padlist (cv);
396	}	395	}
397	}	396	}
		397	#ifdef CXt_FORMAT
398	else if (CxTYPE(cx) == CXt_FORMAT)	398	else if (CxTYPE(cx) == CXt_FORMAT)
399	{	399	{
400	/* I never used formats, so how should I know how these are implemented? */	400	/* I never used formats, so how should I know how these are implemented? */
401	/* my bold guess is as a simple, plain sub... */	401	/* my bold guess is as a simple, plain sub... */
402	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	402	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
403	}	403	}
		404	#endif
404	}	405	}
405	while (cxix >= 0);
406		406
407	if (top_si->si_type == PERLSI_MAIN)	407	if (top_si->si_type == PERLSI_MAIN)
408	break;	408	break;
409		409
410	top_si = top_si->si_prev;	410	top_si = top_si->si_prev;
…		…
417		417
418	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	418	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
419	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	419	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
420	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	420	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
421		421
422	/* I have not the slightest idea of why av_reify is necessary */
423	/* but if it's missing the defav contents magically get replaced sometimes */
424	if (c->defav)
425	av_reify (c->defav);
426
427	c->dowarn = PL_dowarn;	422	c->dowarn = PL_dowarn;
		423	c->in_eval = PL_in_eval;
428		424
429	c->curstackinfo = PL_curstackinfo;	425	c->curstackinfo = PL_curstackinfo;
430	c->curstack = PL_curstack;	426	c->curstack = PL_curstack;
431	c->mainstack = PL_mainstack;	427	c->mainstack = PL_mainstack;
432	c->stack_sp = PL_stack_sp;	428	c->stack_sp = PL_stack_sp;
433	c->op = PL_op;	429	c->op = PL_op;
434	c->curpad = PL_curpad;	430	c->curpad = PL_curpad;
		431	c->comppad = PL_comppad;
		432	c->compcv = PL_compcv;
435	c->stack_base = PL_stack_base;	433	c->stack_base = PL_stack_base;
436	c->stack_max = PL_stack_max;	434	c->stack_max = PL_stack_max;
437	c->tmps_stack = PL_tmps_stack;	435	c->tmps_stack = PL_tmps_stack;
438	c->tmps_floor = PL_tmps_floor;	436	c->tmps_floor = PL_tmps_floor;
439	c->tmps_ix = PL_tmps_ix;	437	c->tmps_ix = PL_tmps_ix;
…		…
445	c->scopestack_ix = PL_scopestack_ix;	443	c->scopestack_ix = PL_scopestack_ix;
446	c->scopestack_max = PL_scopestack_max;	444	c->scopestack_max = PL_scopestack_max;
447	c->savestack = PL_savestack;	445	c->savestack = PL_savestack;
448	c->savestack_ix = PL_savestack_ix;	446	c->savestack_ix = PL_savestack_ix;
449	c->savestack_max = PL_savestack_max;	447	c->savestack_max = PL_savestack_max;
		448	#if !PERL_VERSION_ATLEAST (5,9,0)
450	c->retstack = PL_retstack;	449	c->retstack = PL_retstack;
451	c->retstack_ix = PL_retstack_ix;	450	c->retstack_ix = PL_retstack_ix;
452	c->retstack_max = PL_retstack_max;	451	c->retstack_max = PL_retstack_max;
		452	#endif
		453	c->curpm = PL_curpm;
453	c->curcop = PL_curcop;	454	c->curcop = PL_curcop;
454	c->start_env = PL_start_env;
455	c->top_env = PL_top_env;
456	}	455	}
457		456
458	/*	457	/*
459	* allocate various perl stacks. This is an exact copy	458	* allocate various perl stacks. This is an exact copy
460	* of perl.c:init_stacks, except that it uses less memory	459	* of perl.c:init_stacks, except that it uses less memory
461	* on the assumption that coroutines do not usually need	460	* on the (sometimes correct) assumption that coroutines do
462	* a lot of stackspace.	461	* not usually need a lot of stackspace.
463	*/	462	*/
464	STATIC void	463	static void
465	coro_init_stacks (pTHX)	464	coro_init_stacks ()
466	{	465	{
467	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	466	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
468	PL_curstackinfo->si_type = PERLSI_MAIN;	467	PL_curstackinfo->si_type = PERLSI_MAIN;
469	PL_curstack = PL_curstackinfo->si_stack;	468	PL_curstack = PL_curstackinfo->si_stack;
470	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	469	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
480		479
481	New(54,PL_markstack,16,I32);	480	New(54,PL_markstack,16,I32);
482	PL_markstack_ptr = PL_markstack;	481	PL_markstack_ptr = PL_markstack;
483	PL_markstack_max = PL_markstack + 16;	482	PL_markstack_max = PL_markstack + 16;
484		483
		484	#ifdef SET_MARK_OFFSET
485	SET_MARK_OFFSET;	485	SET_MARK_OFFSET;
		486	#endif
486		487
487	New(54,PL_scopestack,16,I32);	488	New(54,PL_scopestack,16,I32);
488	PL_scopestack_ix = 0;	489	PL_scopestack_ix = 0;
489	PL_scopestack_max = 16;	490	PL_scopestack_max = 16;
490		491
491	New(54,PL_savestack,96,ANY);	492	New(54,PL_savestack,96,ANY);
492	PL_savestack_ix = 0;	493	PL_savestack_ix = 0;
493	PL_savestack_max = 96;	494	PL_savestack_max = 96;
494		495
		496	#if !PERL_VERSION_ATLEAST (5,9,0)
495	New(54,PL_retstack,8,OP*);	497	New(54,PL_retstack,8,OP*);
496	PL_retstack_ix = 0;	498	PL_retstack_ix = 0;
497	PL_retstack_max = 8;	499	PL_retstack_max = 8;
		500	#endif
498	}	501	}
499		502
500	/*	503	/*
501	* destroy the stacks, the callchain etc...	504	* destroy the stacks, the callchain etc...
502	* still there is a memleak of 128 bytes...
503	*/	505	*/
504	STATIC void	506	static void
505	destroy_stacks(pTHX)	507	coro_destroy_stacks ()
506	{	508	{
		509	if (!IN_DESTRUCT)
		510	{
507	/* is this ugly, I ask? */	511	/* is this ugly, I ask? */
508	while (PL_scopestack_ix)	512	LEAVE_SCOPE (0);
509	LEAVE;
510		513
511	/* sure it is, but more important: is it correct?? :/ */	514	/* sure it is, but more important: is it correct?? :/ */
512	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
513	FREETMPS;	515	FREETMPS;
		516
		517	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
		518	}
514		519
515	while (PL_curstackinfo->si_next)	520	while (PL_curstackinfo->si_next)
516	PL_curstackinfo = PL_curstackinfo->si_next;	521	PL_curstackinfo = PL_curstackinfo->si_next;
517		522
518	while (PL_curstackinfo)	523	while (PL_curstackinfo)
519	{	524	{
520	PERL_SI *p = PL_curstackinfo->si_prev;	525	PERL_SI *p = PL_curstackinfo->si_prev;
521		526
522	{	527	{ /*D*//*remove*/
523	dSP;	528	dSP;
524	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	529	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
525	PUTBACK; /* possibly superfluous */	530	PUTBACK; /* possibly superfluous */
526	}	531	}
527		532
528	dounwind(-1);	533	if (!IN_DESTRUCT)
529		534	{
		535	dounwind (-1);/*D*//*remove*/
530	SvREFCNT_dec(PL_curstackinfo->si_stack);	536	SvREFCNT_dec (PL_curstackinfo->si_stack);
		537	}
		538
531	Safefree(PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
532	Safefree(PL_curstackinfo);	540	Safefree (PL_curstackinfo);
533	PL_curstackinfo = p;	541	PL_curstackinfo = p;
534	}	542	}
535		543
536	Safefree(PL_tmps_stack);	544	Safefree (PL_tmps_stack);
537	Safefree(PL_markstack);	545	Safefree (PL_markstack);
538	Safefree(PL_scopestack);	546	Safefree (PL_scopestack);
539	Safefree(PL_savestack);	547	Safefree (PL_savestack);
		548	#if !PERL_VERSION_ATLEAST (5,9,0)
540	Safefree(PL_retstack);	549	Safefree (PL_retstack);
541	}
542
543	static void
544	allocate_stack (Coro__State ctx, int alloc)
545	{
546	coro_stack *stack;
547
548	New (0, stack, 1, coro_stack);
549
550	stack->refcnt = 1;
551	stack->usecnt = 1;
552	stack->gencnt = ctx->gencnt = 0;
553	if (alloc)
554	{
555	#ifdef HAVE_MMAP
556	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
557	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
558	if (stack->sptr == (void *)-1)
559	#endif	550	#endif
560	{
561	/*FIXME*//*D*//* reasonable stack size! */
562	stack->ssize = -4096 * sizeof (long);
563	New (0, stack->sptr, 4096, long);
564	}
565	}
566	else
567	stack->sptr = 0;
568
569	ctx->stack = stack;
570	}	551	}
571		552
572	static void	553	static void
573	deallocate_stack (Coro__State ctx)	554	setup_coro (struct coro *coro)
574	{
575	coro_stack *stack = ctx->stack;
576
577	ctx->stack = 0;
578
579	if (stack)
580	{
581	if (!--stack->refcnt)
582	{
583	#ifdef HAVE_MMAP
584	if (stack->ssize > 0 && stack->sptr)
585	munmap (stack->sptr, stack->ssize);
586	else
587	#else
588	Safefree (stack->sptr);
589	#endif
590	Safefree (stack);
591	}
592	else if (ctx->gencnt == stack->gencnt)
593	--stack->usecnt;
594	}
595	}
596
597	static void
598	setup_coro (void *arg)
599	{	555	{
600	/*	556	/*
601	* emulate part of the perl startup here.	557	* emulate part of the perl startup here.
602	*/	558	*/
		559
		560	coro_init_stacks ();
		561
		562	PL_curcop = 0;
		563	PL_in_eval = 0;
		564	PL_curpm = 0;
		565
		566	{
		567	dSP;
		568	LOGOP myop;
		569
		570	/* I have no idea why this is needed, but it is */
		571	PUSHMARK (SP);
		572
		573	SvREFCNT_dec (GvAV (PL_defgv));
		574	GvAV (PL_defgv) = coro->args; coro->args = 0;
		575
		576	Zero (&myop, 1, LOGOP);
		577	myop.op_next = Nullop;
		578	myop.op_flags = OPf_WANT_VOID;
		579
		580	PL_op = (OP *)&myop;
		581
		582	PUSHMARK (SP);
		583	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
		584	PUTBACK;
		585	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		586	SPAGAIN;
		587
		588	ENTER; /* necessary e.g. for dounwind */
		589	}
		590	}
		591
		592	static void
		593	free_coro_mortal ()
		594	{
		595	if (coro_mortal)
		596	{
		597	SvREFCNT_dec (coro_mortal);
		598	coro_mortal = 0;
		599	}
		600	}
		601
		602	static void NOINLINE
		603	prepare_cctx (coro_cctx *cctx)
		604	{
603	dSP;	605	dSP;
604	Coro__State ctx = (Coro__State)arg;	606	LOGOP myop;
605	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
606		607
607	coro_init_stacks (aTHX);	608	Zero (&myop, 1, LOGOP);
608	JMPENV_BOOTSTRAP;	609	myop.op_next = PL_op;
		610	myop.op_flags = OPf_WANT_VOID;
		611
		612	sv_setiv (get_sv ("Coro::State::cctx", FALSE), PTR2IV (cctx));
		613
		614	PUSHMARK (SP);
		615	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
		616	PUTBACK;
		617	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
609	SPAGAIN;	618	SPAGAIN;
610
611	/*PL_curcop = 0;*/
612	SvREFCNT_dec (GvAV (PL_defgv));
613	GvAV (PL_defgv) = ctx->args;
614
615	if (ctx->stack)
616	{
617	ctx->cursp = 0;
618
619	PUSHMARK(SP);
620	PUTBACK;
621	(void) call_sv (sub_init, G_VOID|G_NOARGS);
622	croak ("FATAL: CCTXT coroutine returned!");
623	}
624	else
625	{
626	UNOP myop;
627
628	PL_op = (OP *)&myop;
629
630	Zero(&myop, 1, UNOP);
631	myop.op_next = Nullop;
632	myop.op_flags = OPf_WANT_VOID;
633
634	PUSHMARK(SP);
635	XPUSHs (sub_init);
636	/*
637	* the next line is slightly wrong, as PL_op->op_next
638	* is actually being executed so we skip the first op.
639	* that doesn't matter, though, since it is only
640	* pp_nextstate and we never return...
641	* ah yes, and I don't care anyways ;)
642	*/
643	PUTBACK;
644	PL_op = pp_entersub();
645	SPAGAIN;
646
647	ENTER; /* necessary e.g. for dounwind */
648	}
649	}	619	}
650		620
651	static void	621	static void
652	continue_coro (void *arg)	622	coro_run (void *arg)
653	{	623	{
		624	/* coro_run is the alternative epilogue of transfer() */
		625	UNLOCK;
		626
654	/*	627	/*
655	* this is a _very_ stripped down perl interpreter ;)	628	* this is a _very_ stripped down perl interpreter ;)
656	*/	629	*/
657	Coro__State ctx = (Coro__State)arg;	630	PL_top_env = &PL_start_env;
		631	/* inject call to cctx_init */
		632	prepare_cctx ((coro_cctx *)arg);
658		633
659	ctx->cursp = 0;	634	/* somebody will hit me for both perl_run and PL_restartop */
660	PL_op = PL_op->op_next;	635	perl_run (PL_curinterp);
661	CALLRUNOPS(aTHX);	636
662	/*NORETURN*/	637	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
663	abort ();	638	abort ();
664	}	639	}
665		640
666	STATIC void	641	static coro_cctx *
		642	cctx_new ()
		643	{
		644	coro_cctx *cctx;
		645
		646	New (0, cctx, 1, coro_cctx);
		647
		648	#if HAVE_MMAP
		649
		650	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		651	/* mmap suppsedly does allocate-on-write for us */
		652	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		653
		654	if (cctx->sptr == (void *)-1)
		655	{
		656	perror ("FATAL: unable to mmap stack for coroutine");
		657	_exit (EXIT_FAILURE);
		658	}
		659
		660	# if STACKGUARD
		661	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		662	# endif
		663
		664	#else
		665
		666	cctx->ssize = STACKSIZE * (long)sizeof (long);
		667	New (0, cctx->sptr, STACKSIZE, long);
		668
		669	if (!cctx->sptr)
		670	{
		671	perror ("FATAL: unable to malloc stack for coroutine");
		672	_exit (EXIT_FAILURE);
		673	}
		674
		675	#endif
		676
		677	#if USE_VALGRIND
		678	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		679	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		680	cctx->ssize + (char *)cctx->sptr
		681	);
		682	#endif
		683
		684	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		685
		686	return cctx;
		687	}
		688
		689	static void
		690	cctx_free (coro_cctx *cctx)
		691	{
		692	if (!cctx)
		693	return;
		694
		695	#if USE_VALGRIND
		696	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		697	#endif
		698
		699	#if HAVE_MMAP
		700	munmap (cctx->sptr, cctx->ssize);
		701	#else
		702	Safefree (cctx->sptr);
		703	#endif
		704
		705	Safefree (cctx);
		706	}
		707
		708	static coro_cctx *cctx_first;
		709	static int cctx_count, cctx_idle;
		710
		711	static coro_cctx *
		712	cctx_get ()
		713	{
		714	coro_cctx *cctx;
		715
		716	if (cctx_first)
		717	{
		718	--cctx_idle;
		719	cctx = cctx_first;
		720	cctx_first = cctx->next;
		721	}
		722	else
		723	{
		724	++cctx_count;
		725	cctx = cctx_new ();
		726	PL_op = PL_op->op_next;
		727	}
		728
		729	return cctx;
		730	}
		731
		732	static void
		733	cctx_put (coro_cctx *cctx)
		734	{
		735	++cctx_idle;
		736	cctx->next = cctx_first;
		737	cctx_first = cctx;
		738	}
		739
		740	/* never call directly, always through the coro_state_transfer global variable */
		741	static void NOINLINE
667	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	742	transfer (struct coro *prev, struct coro *next, int flags)
668	{	743	{
669	dSP;
670	dSTACKLEVEL;	744	dSTACKLEVEL;
671		745
		746	/* sometimes transfer is only called to set idle_sp */
		747	if (flags == TRANSFER_SET_STACKLEVEL)
		748	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
672	if (prev != next)	749	else if (prev != next)
673	{	750	{
		751	coro_cctx *prev__cctx;
		752
		753	LOCK;
		754
674	if (next->mainstack)	755	if (next->mainstack)
675	{	756	{
		757	/* coroutine already started */
676	SAVE (prev, flags);	758	SAVE (prev, flags);
677	LOAD (next);	759	LOAD (next);
678
679	/* mark this state as in-use */
680	next->mainstack = 0;
681	next->tmps_ix = -2;
682
683	/* stacklevel changed? if yes, grab the stack for us! */
684	if (flags & TRANSFER_SAVE_CCTXT)
685	{
686	if (!prev->stack)
687	allocate_stack (prev, 0);
688	else if (prev->cursp != stacklevel
689	&& prev->stack->usecnt > 1)
690	{
691	prev->gencnt = ++prev->stack->gencnt;
692	prev->stack->usecnt = 1;
693	}
694
695	/* has our stack been invalidated? */
696	if (next->stack && next->stack->gencnt != next->gencnt)
697	{
698	deallocate_stack (next);
699	allocate_stack (next, 1);
700	coro_create (&(next->stack->cctx),
701	continue_coro, (void *)next,
702	next->stack->sptr, labs (next->stack->ssize));
703	}
704
705	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
706	}
707
708	}	760	}
709	else if (next->tmps_ix == -2)
710	croak ("tried to transfer to running coroutine");
711	else	761	else
712	{	762	{
		763	/* need to start coroutine */
713	SAVE (prev, -1); /* first get rid of the old state */	764	/* first get rid of the old state */
714		765	SAVE (prev, -1);
715	if (flags & TRANSFER_SAVE_CCTXT)	766	/* setup coroutine call */
716	{
717	if (!prev->stack)
718	allocate_stack (prev, 0);
719
720	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
721	{
722	setup_coro (next);
723
724	prev->stack->refcnt++;
725	prev->stack->usecnt++;
726	next->stack = prev->stack;
727	next->gencnt = prev->gencnt;
728	}
729	else
730	{
731	allocate_stack (next, 1);
732	coro_create (&(next->stack->cctx),
733	setup_coro, (void *)next,
734	next->stack->sptr, labs (next->stack->ssize));
735	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
736	}
737	}
738	else
739	setup_coro (next);	767	setup_coro (next);
		768	/* need a stack */
		769	next->cctx = 0;
740	}	770	}
		771
		772	if (!prev->cctx)
		773	/* create a new empty context */
		774	Newz (0, prev->cctx, 1, coro_cctx);
		775
		776	prev__cctx = prev->cctx;
		777
		778	/* possibly "free" the cctx */
		779	if (prev__cctx->idle_sp == STACKLEVEL)
		780	{
		781	cctx_put (prev__cctx);
		782	prev->cctx = 0;
		783	}
		784
		785	if (!next->cctx)
		786	next->cctx = cctx_get ();
		787
		788	if (prev__cctx != next->cctx)
		789	{
		790	prev__cctx->top_env = PL_top_env;
		791	PL_top_env = next->cctx->top_env;
		792	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		793	}
		794
		795	free_coro_mortal ();
		796
		797	UNLOCK;
741	}	798	}
		799	}
742		800
743	next->cursp = stacklevel;	801	struct transfer_args
		802	{
		803	struct coro *prev, *next;
		804	int flags;
		805	};
		806
		807	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		808
		809	static void
		810	coro_state_destroy (struct coro *coro)
		811	{
		812	if (coro->refcnt--)
		813	return;
		814
		815	if (coro->mainstack && coro->mainstack != main_mainstack)
		816	{
		817	struct coro temp;
		818
		819	SAVE ((&temp), TRANSFER_SAVE_ALL);
		820	LOAD (coro);
		821
		822	coro_destroy_stacks ();
		823
		824	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		825
		826	coro->mainstack = 0;
		827	}
		828
		829	cctx_free (coro->cctx);
		830	SvREFCNT_dec (coro->args);
		831	Safefree (coro);
		832	}
		833
		834	static int
		835	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		836	{
		837	struct coro *coro = (struct coro *)mg->mg_ptr;
		838	mg->mg_ptr = 0;
		839
		840	coro_state_destroy (coro);
		841
		842	return 0;
		843	}
		844
		845	static int
		846	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		847	{
		848	struct coro *coro = (struct coro *)mg->mg_ptr;
		849
		850	++coro->refcnt;
		851
		852	return 0;
		853	}
		854
		855	static MGVTBL coro_state_vtbl = {
		856	0, 0, 0, 0,
		857	coro_state_clear,
		858	0,
		859	#ifdef MGf_DUP
		860	coro_state_dup,
		861	#else
		862	# define MGf_DUP 0
		863	#endif
		864	};
		865
		866	static struct coro *
		867	SvSTATE (SV *coro)
		868	{
		869	HV *stash;
		870	MAGIC *mg;
		871
		872	if (SvROK (coro))
		873	coro = SvRV (coro);
		874
		875	stash = SvSTASH (coro);
		876	if (stash != coro_stash && stash != coro_state_stash)
		877	{
		878	/* very slow, but rare, check */
		879	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		880	croak ("Coro::State object required");
		881	}
		882
		883	mg = SvMAGIC (coro);
		884	assert (mg->mg_type == PERL_MAGIC_ext);
		885	return (struct coro *)mg->mg_ptr;
		886	}
		887
		888	static void
		889	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		890	{
		891	ta->prev = SvSTATE (prev);
		892	ta->next = SvSTATE (next);
		893	ta->flags = flags;
		894	}
		895
		896	static void
		897	api_transfer (SV *prev, SV *next, int flags)
		898	{
		899	dTHX;
		900	struct transfer_args ta;
		901
		902	prepare_transfer (&ta, prev, next, flags);
		903	TRANSFER (ta);
		904	}
		905
		906	/** Coro ********************************************************************/
		907
		908	#define PRIO_MAX 3
		909	#define PRIO_HIGH 1
		910	#define PRIO_NORMAL 0
		911	#define PRIO_LOW -1
		912	#define PRIO_IDLE -3
		913	#define PRIO_MIN -4
		914
		915	/* for Coro.pm */
		916	static GV *coro_current, *coro_idle;
		917	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		918	static int coro_nready;
		919
		920	static void
		921	coro_enq (SV *sv)
		922	{
		923	int prio;
		924
		925	if (SvTYPE (sv) != SVt_PVHV)
		926	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		927
		928	prio = SvSTATE (sv)->prio;
		929
		930	av_push (coro_ready [prio - PRIO_MIN], sv);
		931	coro_nready++;
		932	}
		933
		934	static SV *
		935	coro_deq (int min_prio)
		936	{
		937	int prio = PRIO_MAX - PRIO_MIN;
		938
		939	min_prio -= PRIO_MIN;
		940	if (min_prio < 0)
		941	min_prio = 0;
		942
		943	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		944	if (AvFILLp (coro_ready [prio]) >= 0)
		945	{
		946	coro_nready--;
		947	return av_shift (coro_ready [prio]);
		948	}
		949
		950	return 0;
		951	}
		952
		953	static void
		954	api_ready (SV *coro)
		955	{
		956	dTHX;
		957
		958	if (SvROK (coro))
		959	coro = SvRV (coro);
		960
		961	LOCK;
		962	coro_enq (SvREFCNT_inc (coro));
		963	UNLOCK;
		964	}
		965
		966	static void
		967	prepare_schedule (struct transfer_args *ta)
		968	{
		969	SV *current, *prev, *next;
		970
		971	current = GvSV (coro_current);
		972
		973	for (;;)
		974	{
		975	LOCK;
		976	next = coro_deq (PRIO_MIN);
		977	UNLOCK;
		978
		979	if (next)
		980	break;
		981
		982	{
		983	dSP;
		984
		985	ENTER;
		986	SAVETMPS;
		987
		988	PUSHMARK (SP);
		989	PUTBACK;
		990	call_sv (GvSV (coro_idle), G_DISCARD);
		991
		992	FREETMPS;
		993	LEAVE;
		994	}
		995	}
		996
		997	prev = SvRV (current);
		998	SvRV (current) = next;
		999
		1000	/* free this only after the transfer */
		1001	LOCK;
		1002	free_coro_mortal ();
		1003	UNLOCK;
		1004	coro_mortal = prev;
		1005
		1006	ta->prev = SvSTATE (prev);
		1007	ta->next = SvSTATE (next);
		1008	ta->flags = TRANSFER_SAVE_ALL;
		1009	}
		1010
		1011	static void
		1012	prepare_cede (struct transfer_args *ta)
		1013	{
		1014	LOCK;
		1015	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		1016	UNLOCK;
		1017
		1018	prepare_schedule (ta);
		1019	}
		1020
		1021	static void
		1022	api_schedule (void)
		1023	{
		1024	dTHX;
		1025	struct transfer_args ta;
		1026
		1027	prepare_schedule (&ta);
		1028	TRANSFER (ta);
		1029	}
		1030
		1031	static void
		1032	api_cede (void)
		1033	{
		1034	dTHX;
		1035	struct transfer_args ta;
		1036
		1037	prepare_cede (&ta);
		1038	TRANSFER (ta);
744	}	1039	}
745		1040
746	MODULE = Coro::State PACKAGE = Coro::State	1041	MODULE = Coro::State PACKAGE = Coro::State
747		1042
748	PROTOTYPES: ENABLE	1043	PROTOTYPES: DISABLE
749		1044
750	BOOT:	1045	BOOT:
751	{ /* {} necessary for stoopid perl-5.6.x */	1046	{
752	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1047	#ifdef USE_ITHREADS
753	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1048	MUTEX_INIT (&coro_mutex);
		1049	#endif
		1050	BOOT_PAGESIZE;
		1051
754	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1052	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
755		1053
756	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1054	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
757	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1055	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
758	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1056	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
759	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
760
761	if (!padlist_cache)
762	padlist_cache = newHV ();
763		1057
764	main_mainstack = PL_mainstack;	1058	main_mainstack = PL_mainstack;
765	}
766		1059
767	Coro::State	1060	coroapi.ver = CORO_API_VERSION;
768	_newprocess(args)	1061	coroapi.transfer = api_transfer;
769	SV * args	1062
770	PROTOTYPE: $	1063	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1064	}
		1065
		1066	SV *
		1067	new (char *klass, ...)
771	CODE:	1068	CODE:
772	Coro__State coro;	1069	{
		1070	struct coro *coro;
		1071	HV *hv;
		1072	int i;
773		1073
774	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
775	croak ("Coro::State::_newprocess expects an arrayref");
776
777	New (0, coro, 1, struct coro);	1074	Newz (0, coro, 1, struct coro);
		1075	coro->args = newAV ();
778		1076
779	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1077	hv = newHV ();
780	coro->mainstack = 0; /* actual work is done inside transfer */	1078	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
781	coro->stack = 0;	1079	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
782		1080
783	RETVAL = coro;	1081	for (i = 1; i < items; i++)
		1082	av_push (coro->args, newSVsv (ST (i)));
		1083	}
784	OUTPUT:	1084	OUTPUT:
785	RETVAL	1085	RETVAL
786		1086
787	void	1087	void
788	transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK)	1088	_set_stacklevel (...)
789	Coro::State_or_hashref prev	1089	ALIAS:
790	Coro::State_or_hashref next	1090	Coro::State::transfer = 1
791	int flags	1091	Coro::schedule = 2
792	PROTOTYPE: @	1092	Coro::cede = 3
		1093	Coro::Cont::yield = 4
793	CODE:	1094	CODE:
794	transfer (aTHX_ prev, next, flags);	1095	{
		1096	struct transfer_args ta;
		1097
		1098	switch (ix)
		1099	{
		1100	case 0:
		1101	ta.prev = (struct coro *)INT2PTR (coro_cctx *, 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	}
795		1151
796	void	1152	void
797	DESTROY(coro)	1153	_clone_state_from (SV *dst, SV *src)
798	Coro::State coro	1154	CODE:
		1155	{
		1156	struct coro *coro_src = SvSTATE (src);
		1157
		1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
		1159
		1160	++coro_src->refcnt;
		1161	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
		1162	}
		1163
		1164	void
		1165	_exit (code)
		1166	int code
		1167	PROTOTYPE: $
		1168	CODE:
		1169	_exit (code);
		1170
		1171	int
		1172	cctx_count ()
		1173	CODE:
		1174	RETVAL = cctx_count;
		1175	OUTPUT:
		1176	RETVAL
		1177
		1178	int
		1179	cctx_idle ()
		1180	CODE:
		1181	RETVAL = cctx_idle;
		1182	OUTPUT:
		1183	RETVAL
		1184
		1185	MODULE = Coro::State PACKAGE = Coro
		1186
		1187	BOOT:
		1188	{
		1189	int i;
		1190
		1191	coro_stash = gv_stashpv ("Coro", TRUE);
		1192
		1193	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1194	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1195	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1196	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1197	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1198	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1199
		1200	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
		1201	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
		1202
		1203	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1204	coro_ready[i] = newAV ();
		1205
		1206	{
		1207	SV *sv = perl_get_sv("Coro::API", 1);
		1208
		1209	coroapi.schedule = api_schedule;
		1210	coroapi.cede = api_cede;
		1211	coroapi.ready = api_ready;
		1212	coroapi.nready = &coro_nready;
		1213	coroapi.current = coro_current;
		1214
		1215	GCoroAPI = &coroapi;
		1216	sv_setiv (sv, (IV)&coroapi);
		1217	SvREADONLY_on (sv);
		1218	}
		1219	}
		1220
		1221	int
		1222	prio (Coro::State coro, int newprio = 0)
		1223	ALIAS:
		1224	nice = 1
799	CODE:	1225	CODE:
		1226	{
		1227	RETVAL = coro->prio;
800		1228
801	if (coro->mainstack && coro->mainstack != main_mainstack)	1229	if (items > 1)
802	{	1230	{
803	struct coro temp;	1231	if (ix)
		1232	newprio += coro->prio;
804		1233
805	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1234	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
806	LOAD(aTHX_ coro);	1235	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
807		1236
808	destroy_stacks (aTHX);	1237	coro->prio = newprio;
809
810	LOAD((&temp)); /* this will get rid of defsv etc.. */
811
812	coro->mainstack = 0;
813	}	1238	}
814		1239	}
815	deallocate_stack (coro);
816
817	Safefree (coro);
818		1240
819	void	1241	void
820	flush()	1242	ready (SV *self)
		1243	PROTOTYPE: $
821	CODE:	1244	CODE:
822	#ifdef MAY_FLUSH	1245	api_ready (self);
823	flush_padlist_cache ();
824	#endif
825		1246
		1247	int
		1248	nready (...)
		1249	PROTOTYPE:
		1250	CODE:
		1251	RETVAL = coro_nready;
		1252	OUTPUT:
		1253	RETVAL
		1254
826	MODULE = Coro::State PACKAGE = Coro::Cont	1255	MODULE = Coro::State PACKAGE = Coro::AIO
827		1256
828	# this is slightly dirty	1257	SV *
		1258	_get_state ()
		1259	CODE:
		1260	{
		1261	struct {
		1262	int errorno;
		1263	int laststype;
		1264	int laststatval;
		1265	Stat_t statcache;
		1266	} data;
		1267
		1268	data.errorno = errno;
		1269	data.laststype = PL_laststype;
		1270	data.laststatval = PL_laststatval;
		1271	data.statcache = PL_statcache;
		1272
		1273	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1274	}
		1275	OUTPUT:
		1276	RETVAL
829		1277
830	void	1278	void
831	yield(...)	1279	_set_state (char *data_)
832	PROTOTYPE: @	1280	PROTOTYPE: $
833	CODE:	1281	CODE:
834	static SV *returnstk;	1282	{
835	SV *sv;	1283	struct {
836	AV *defav = GvAV (PL_defgv);	1284	int errorno;
837	struct coro *prev, *next;	1285	int laststype;
		1286	int laststatval;
		1287	Stat_t statcache;
		1288	} *data = (void *)data_;
838		1289
839	if (!returnstk)	1290	errno = data->errorno;
840	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	1291	PL_laststype = data->laststype;
841		1292	PL_laststatval = data->laststatval;
842	/* set up @_ -- ugly */	1293	PL_statcache = data->statcache;
843	av_clear (defav);	1294	}
844	av_fill (defav, items - 1);
845	while (items--)
846	av_store (defav, items, SvREFCNT_inc (ST(items)));
847
848	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
849	sv = av_pop ((AV *)SvRV (returnstk));
850	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
851	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
852	SvREFCNT_dec (sv);
853
854	transfer(aTHX_ prev, next, 0);
855

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines