[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.24 by root, Tue Aug 14 14:56:22 2001 UTC vs.
Revision 1.109 by root, Mon Nov 27 18:45:29 2006 UTC

…		…
		1	#include "libcoro/coro.c"
		2
1	#include "EXTERN.h"	3	#include "EXTERN.h"
2	#include "perl.h"	4	#include "perl.h"
3	#include "XSUB.h"	5	#include "XSUB.h"
4		6
5	#include "libcoro/coro.c"	7	#include "patchlevel.h"
6		8
		9	#if USE_VALGRIND
		10	# include <valgrind/valgrind.h>
		11	#endif
		12
		13	#define PERL_VERSION_ATLEAST(a,b,c) \
		14	(PERL_REVISION > (a) \
		15	\|\| (PERL_REVISION == (a) \
		16	&& (PERL_VERSION > (b) \
		17	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		18
		19	#if !PERL_VERSION_ATLEAST (5,6,0)
		20	# ifndef PL_ppaddr
		21	# define PL_ppaddr ppaddr
		22	# endif
		23	# ifndef call_sv
		24	# define call_sv perl_call_sv
		25	# endif
		26	# ifndef get_sv
		27	# define get_sv perl_get_sv
		28	# endif
		29	# ifndef get_cv
		30	# define get_cv perl_get_cv
		31	# endif
		32	# ifndef IS_PADGV
		33	# define IS_PADGV(v) 0
		34	# endif
		35	# ifndef IS_PADCONST
		36	# define IS_PADCONST(v) 0
		37	# endif
		38	#endif
		39
7	#include <signal.h>	40	#include <stdio.h>
		41	#include <errno.h>
		42
		43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		44	# undef STACKGUARD
		45	#endif
		46
		47	#ifndef STACKGUARD
		48	# define STACKGUARD 0
		49	#endif
8		50
9	#ifdef HAVE_MMAP	51	#ifdef HAVE_MMAP
10	# include <unistd.h>	52	# include <unistd.h>
11	# include <sys/mman.h>	53	# include <sys/mman.h>
12	# ifndef MAP_ANON
13	# ifdef MAP_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
14	# define MAP_ANON MAP_ANONYMOUS	55	# ifdef MAP_ANON
		56	# define MAP_ANONYMOUS MAP_ANON
15	# else	57	# else
16	# undef HAVE_MMAP	58	# undef HAVE_MMAP
17	# endif	59	# endif
18	# endif	60	# endif
		61	# include <limits.h>
		62	# ifndef PAGESIZE
		63	# define PAGESIZE pagesize
		64	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		65	static long pagesize;
		66	# else
		67	# define BOOT_PAGESIZE (void)0
19	#endif	68	# endif
		69	#else
		70	# define PAGESIZE 0
		71	# define BOOT_PAGESIZE (void)0
		72	#endif
20		73
21	#define MAY_FLUSH /* increases codesize */
22
23	#define SUB_INIT "Coro::State::initialize"
24	#define UCORO_STATE "_coro_state"
25
26	/* 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
27	* to the current C stack pointer. Its property is that it changes with each call	75	* to the current C stack pointer. Its property is that it changes with each call
28	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
30		79
31	#define labs(l) ((l) >= 0 ? (l) : -(l))	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		81
		82	#if __GNUC__ >= 3
		83	# define attribute(x) __attribute__(x)
		84	#else
		85	# define attribute(x)
		86	#endif
		87
		88	#define NOINLINE attribute ((noinline))
32		89
33	#include "CoroAPI.h"	90	#include "CoroAPI.h"
34		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
35	static struct CoroAPI coroapi;	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 */
36		107
37	/* this is actually not only the c stack but also c registers etc... */	108	static struct coro_cctx *cctx_first;
		109	static int cctx_count, cctx_idle;
		110
		111	/* this is a structure representing a c-level coroutine */
38	typedef struct {	112	typedef struct coro_cctx {
39	int refcnt; /* pointer reference counter */	113	struct coro_cctx *next;
40	int usecnt; /* shared by how many coroutines */
41	int gencnt; /* generation counter */
42		114
43	coro_context cctx;	115	/* the stack */
44
45	void *sptr;	116	void *sptr;
46	long ssize; /* positive == mmap, otherwise malloc */	117	long ssize; /* positive == mmap, otherwise malloc */
47	} coro_stack;
48		118
		119	/* cpu state */
		120	void idle_sp; / sp of top-level transfer/schedule/cede call */
		121	JMPENV *top_env;
		122	coro_context cctx;
		123
		124	#if USE_VALGRIND
		125	int valgrind_id;
		126	#endif
		127	} coro_cctx;
		128
		129	/* this is a structure representing a perl-level coroutine */
49	struct coro {	130	struct coro {
50	/* the optional C context */	131	/* the c coroutine allocated to this perl coroutine, if any */
51	coro_stack *stack;	132	coro_cctx *cctx;
52	void *cursp;	133
		134	/* data associated with this coroutine (initial args) */
		135	AV *args;
53	int gencnt;	136	int refcnt;
54		137
55	/* optionally saved, might be zero */	138	/* optionally saved, might be zero */
56	AV *defav;	139	AV *defav;
57	SV *defsv;	140	SV *defsv;
58	SV *errsv;	141	SV *errsv;
59		142
60	/* saved global state not related to stacks */	143	#define VAR(name,type) type name;
61	U8 dowarn;	144	# include "state.h"
62	I32 in_eval;	145	#undef VAR
63		146
64	/* the stacks and related info (callchain etc..) */	147	/* coro process data */
65	PERL_SI *curstackinfo;	148	int prio;
66	AV *curstack;
67	AV *mainstack;
68	SV **stack_sp;
69	OP *op;
70	SV **curpad;
71	SV **stack_base;
72	SV **stack_max;
73	SV **tmps_stack;
74	I32 tmps_floor;
75	I32 tmps_ix;
76	I32 tmps_max;
77	I32 *markstack;
78	I32 *markstack_ptr;
79	I32 *markstack_max;
80	I32 *scopestack;
81	I32 scopestack_ix;
82	I32 scopestack_max;
83	ANY *savestack;
84	I32 savestack_ix;
85	I32 savestack_max;
86	OP **retstack;
87	I32 retstack_ix;
88	I32 retstack_max;
89	COP *curcop;
90	JMPENV *top_env;
91
92	/* data associated with this coroutine (initial args) */
93	AV *args;
94	};	149	};
95		150
96	typedef struct coro *Coro__State;	151	typedef struct coro *Coro__State;
97	typedef struct coro *Coro__State_or_hashref;	152	typedef struct coro *Coro__State_or_hashref;
98		153
99	static AV main_mainstack; / used to differentiate between $main and others */	154	static AV *
100	static HV *coro_state_stash;	155	coro_clone_padlist (CV *cv)
101	static SV *ucoro_state_sv;
102	static U32 ucoro_state_hash;
103	static HV *padlist_cache;
104
105	/* mostly copied from op.c:cv_clone2 */
106	STATIC AV *
107	clone_padlist (AV *protopadlist)
108	{	156	{
109	AV *av;	157	AV *padlist = CvPADLIST (cv);
110	I32 ix;
111	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
112	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
113	SV **pname = AvARRAY (protopad_name);
114	SV **ppad = AvARRAY (protopad);
115	I32 fname = AvFILLp (protopad_name);
116	I32 fpad = AvFILLp (protopad);
117	AV newpadlist, newpad_name, *newpad;	158	AV newpadlist, newpad;
118	SV **npad;
119
120	newpad_name = newAV ();
121	for (ix = fname; ix >= 0; ix--)
122	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124	newpad = newAV ();
125	av_fill (newpad, AvFILLp (protopad));
126	npad = AvARRAY (newpad);
127		159
128	newpadlist = newAV ();	160	newpadlist = newAV ();
129	AvREAL_off (newpadlist);	161	AvREAL_off (newpadlist);
130	av_store (newpadlist, 0, (SV *) newpad_name);	162	#if PERL_VERSION_ATLEAST (5,9,0)
		163	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		164	#else
		165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		166	#endif
		167	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		168	--AvFILLp (padlist);
		169
		170	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
131	av_store (newpadlist, 1, (SV *) newpad);	171	av_store (newpadlist, 1, (SV *)newpad);
132		172
133	av = newAV (); /* will be @_ */	173	return newpadlist;
134	av_extend (av, 0);	174	}
135	av_store (newpad, 0, (SV *) av);
136	AvFLAGS (av) = AVf_REIFY;
137		175
138	for (ix = fpad; ix > 0; ix--)	176	static void
		177	free_padlist (AV *padlist)
		178	{
		179	/* may be during global destruction */
		180	if (SvREFCNT (padlist))
139	{	181	{
140	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	182	I32 i = AvFILLp (padlist);
141	if (namesv && namesv != &PL_sv_undef)	183	while (i >= 0)
142	{	184	{
143	char name = SvPVX (namesv); / XXX */	185	SV **svp = av_fetch (padlist, i--, FALSE);
144	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')	186	if (svp)
145	{ /* lexical from outside? */
146	npad[ix] = SvREFCNT_inc (ppad[ix]);
147	}	187	{
148	else
149	{ /* our own lexical */
150	SV *sv;	188	SV *sv;
151	if (*name == '&')	189	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
152	sv = SvREFCNT_inc (ppad[ix]);	190	SvREFCNT_dec (sv);
153	else if (*name == '@')	191
154	sv = (SV *) newAV ();	192	SvREFCNT_dec (*svp);
155	else if (*name == '%')
156	sv = (SV *) newHV ();
157	else
158	sv = NEWSV (0, 0);
159	if (!SvPADBUSY (sv))
160	SvPADMY_on (sv);
161	npad[ix] = sv;
162	}	193	}
163	}	194	}
164	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))	195
165	{	196	SvREFCNT_dec ((SV*)padlist);
166	npad[ix] = SvREFCNT_inc (ppad[ix]);
167	}
168	else
169	{
170	SV *sv = NEWSV (0, 0);
171	SvPADTMP_on (sv);
172	npad[ix] = sv;
173	}
174	}	197	}
		198	}
175		199
176	#if 0 /* return -ENOTUNDERSTOOD */	200	static int
177	/* Now that vars are all in place, clone nested closures. */	201	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		202	{
		203	AV *padlist;
		204	AV av = (AV )mg->mg_obj;
178		205
179	for (ix = fpad; ix > 0; ix--) {	206	/* casting is fun. */
180	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	207	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
181	if (namesv	208	free_padlist (padlist);
182	&& namesv != &PL_sv_undef	209
183	&& !(SvFLAGS(namesv) & SVf_FAKE)	210	SvREFCNT_dec (av);
184	&& *SvPVX(namesv) == '&'	211
185	&& CvCLONE(ppad[ix]))	212	return 0;
186	{	213	}
187	CV kid = cv_clone((CV)ppad[ix]);	214
188	SvREFCNT_dec(ppad[ix]);	215	#define PERL_MAGIC_coro PERL_MAGIC_ext
189	CvCLONE_on(kid);	216
190	SvPADMY_on(kid);	217	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
191	npad[ix] = (SV*)kid;	218
192	}	219	#define CORO_MAGIC(cv) \
		220	SvMAGIC (cv) \
		221	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		222	? SvMAGIC (cv) \
		223	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		224	: 0
		225
		226	/* the next two functions merely cache the padlists */
		227	static void
		228	get_padlist (CV *cv)
		229	{
		230	MAGIC *mg = CORO_MAGIC (cv);
		231	AV *av;
		232
		233	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
		234	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		235	else
		236	{
		237	#if 0
		238	/* this is probably cleaner, but also slower? */
		239	CV *cp = Perl_cv_clone (cv);
		240	CvPADLIST (cv) = CvPADLIST (cp);
		241	CvPADLIST (cp) = 0;
		242	SvREFCNT_dec (cp);
		243	#else
		244	CvPADLIST (cv) = coro_clone_padlist (cv);
		245	#endif
		246	}
		247	}
		248
		249	static void
		250	put_padlist (CV *cv)
		251	{
		252	MAGIC *mg = CORO_MAGIC (cv);
		253	AV *av;
		254
		255	if (!mg)
		256	{
		257	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		258	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		259	mg->mg_virtual = &vtbl_coro;
		260	mg->mg_obj = (SV *)newAV ();
193	}	261	}
194	#endif
195		262
196	return newpadlist;	263	av = (AV *)mg->mg_obj;
197	}
198		264
199	#ifdef MAY_FLUSH	265	if (AvFILLp (av) >= AvMAX (av))
200	STATIC AV *	266	av_extend (av, AvMAX (av) + 1);
201	free_padlist (AV *padlist)
202	{
203	/* may be during global destruction */
204	if (SvREFCNT(padlist))
205	{
206	I32 i = AvFILLp(padlist);
207	while (i >= 0)
208	{
209	SV **svp = av_fetch(padlist, i--, FALSE);
210	SV sv = svp ? svp : Nullsv;
211	if (sv)
212	SvREFCNT_dec(sv);
213	}
214		267
215	SvREFCNT_dec((SV*)padlist);	268	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
216	}
217	}	269	}
218	#endif
219
220	/* the next two functions merely cache the padlists */
221	STATIC void
222	get_padlist (CV *cv)
223	{
224	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);
225
226	if (he && AvFILLp ((AV )he) >= 0)
227	CvPADLIST (cv) = (AV )av_pop ((AV )*he);
228	else
229	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230	}
231
232	STATIC void
233	put_padlist (CV *cv)
234	{
235	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);
236
237	if (SvTYPE (*he) != SVt_PVAV)
238	{
239	SvREFCNT_dec (*he);
240	he = (SV )newAV ();
241	}
242
243	av_push ((AV )he, (SV *)CvPADLIST (cv));
244	}
245
246	#ifdef MAY_FLUSH
247	STATIC void
248	flush_padlist_cache ()
249	{
250	HV *hv = padlist_cache;
251	padlist_cache = newHV ();
252
253	if (hv_iterinit (hv))
254	{
255	HE *he;
256	AV *padlist;
257
258	while (!!(he = hv_iternext (hv)))
259	{
260	AV av = (AV )HeVAL(he);
261
262	/* casting is fun. */
263	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
264	free_padlist (padlist);
265	}
266	}
267
268	SvREFCNT_dec (hv);
269	}
270	#endif
271		270
272	#define SB do {	271	#define SB do {
273	#define SE } while (0)	272	#define SE } while (0)
274		273
275	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	274	#define LOAD(state) load_state((state));
276	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	275	#define SAVE(state,flags) save_state((state),(flags));
277		276
278	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	277	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
279		278
280	static void	279	static void
281	load_state(pTHX_ Coro__State c)	280	load_state(Coro__State c)
282	{	281	{
283	PL_dowarn = c->dowarn;	282	#define VAR(name,type) PL_ ## name = c->name;
284	PL_in_eval = c->in_eval;	283	# include "state.h"
285		284	#undef VAR
286	PL_curstackinfo = c->curstackinfo;
287	PL_curstack = c->curstack;
288	PL_mainstack = c->mainstack;
289	PL_stack_sp = c->stack_sp;
290	PL_op = c->op;
291	PL_curpad = c->curpad;
292	PL_stack_base = c->stack_base;
293	PL_stack_max = c->stack_max;
294	PL_tmps_stack = c->tmps_stack;
295	PL_tmps_floor = c->tmps_floor;
296	PL_tmps_ix = c->tmps_ix;
297	PL_tmps_max = c->tmps_max;
298	PL_markstack = c->markstack;
299	PL_markstack_ptr = c->markstack_ptr;
300	PL_markstack_max = c->markstack_max;
301	PL_scopestack = c->scopestack;
302	PL_scopestack_ix = c->scopestack_ix;
303	PL_scopestack_max = c->scopestack_max;
304	PL_savestack = c->savestack;
305	PL_savestack_ix = c->savestack_ix;
306	PL_savestack_max = c->savestack_max;
307	PL_retstack = c->retstack;
308	PL_retstack_ix = c->retstack_ix;
309	PL_retstack_max = c->retstack_max;
310	PL_curcop = c->curcop;
311	PL_top_env = c->top_env;
312		285
313	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	286	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	287	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	288	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316		289
319	CV *cv;	292	CV *cv;
320		293
321	/* now do the ugly restore mess */	294	/* now do the ugly restore mess */
322	while ((cv = (CV *)POPs))	295	while ((cv = (CV *)POPs))
323	{	296	{
324	AV padlist = (AV )POPs;
325
326	if (padlist)
327	{
328	put_padlist (cv); /* mark this padlist as available */	297	put_padlist (cv); /* mark this padlist as available */
329	CvPADLIST(cv) = padlist;	298	CvDEPTH (cv) = PTR2IV (POPs);
330	#ifdef USE_THREADS	299	CvPADLIST (cv) = (AV *)POPs;
331	/CvOWNER(cv) = (struct perl_thread )POPs;*/
332	#endif
333	}
334
335	++CvDEPTH(cv);
336	}	300	}
337		301
338	PUTBACK;	302	PUTBACK;
339	}	303	}
340	}	304	}
341		305
342	static void	306	static void
343	save_state(pTHX_ Coro__State c, int flags)	307	save_state(Coro__State c, int flags)
344	{	308	{
345	{	309	{
346	dSP;	310	dSP;
347	I32 cxix = cxstack_ix;	311	I32 cxix = cxstack_ix;
348	PERL_CONTEXT *ccstk = cxstack;	312	PERL_CONTEXT *ccstk = cxstack;
…		…
355		319
356	PUSHs (Nullsv);	320	PUSHs (Nullsv);
357	/* this loop was inspired by pp_caller */	321	/* this loop was inspired by pp_caller */
358	for (;;)	322	for (;;)
359	{	323	{
360	do	324	while (cxix >= 0)
361	{	325	{
362	PERL_CONTEXT *cx = &ccstk[cxix--];	326	PERL_CONTEXT *cx = &ccstk[cxix--];
363		327
364	if (CxTYPE(cx) == CXt_SUB)	328	if (CxTYPE(cx) == CXt_SUB)
365	{	329	{
366	CV *cv = cx->blk_sub.cv;	330	CV *cv = cx->blk_sub.cv;
		331
367	if (CvDEPTH(cv))	332	if (CvDEPTH (cv))
368	{	333	{
369	#ifdef USE_THREADS
370	/XPUSHs ((SV )CvOWNER(cv));*/
371	/CvOWNER(cv) = 0;/
372	/error must unlock this cv etc.. etc.../
373	#endif
374	EXTEND (SP, CvDEPTH(cv)*2);	334	EXTEND (SP, 3);
375
376	while (--CvDEPTH(cv))
377	{
378	/* this tells the restore code to increment CvDEPTH */
379	PUSHs (Nullsv);
380	PUSHs ((SV *)cv);
381	}
382		335
383	PUSHs ((SV *)CvPADLIST(cv));	336	PUSHs ((SV *)CvPADLIST(cv));
		337	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
384	PUSHs ((SV *)cv);	338	PUSHs ((SV *)cv);
385		339
		340	CvDEPTH (cv) = 0;
386	get_padlist (cv); /* this is a monster */	341	get_padlist (cv);
387	}	342	}
388	}	343	}
		344	#ifdef CXt_FORMAT
389	else if (CxTYPE(cx) == CXt_FORMAT)	345	else if (CxTYPE(cx) == CXt_FORMAT)
390	{	346	{
391	/* I never used formats, so how should I know how these are implemented? */	347	/* I never used formats, so how should I know how these are implemented? */
392	/* my bold guess is as a simple, plain sub... */	348	/* my bold guess is as a simple, plain sub... */
393	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	349	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394	}	350	}
		351	#endif
395	}	352	}
396	while (cxix >= 0);
397		353
398	if (top_si->si_type == PERLSI_MAIN)	354	if (top_si->si_type == PERLSI_MAIN)
399	break;	355	break;
400		356
401	top_si = top_si->si_prev;	357	top_si = top_si->si_prev;
…		…
408		364
409	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	365	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
410	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	366	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
411	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	367	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
412		368
413	/* I have not the slightest idea of why av_reify is necessary */	369	#define VAR(name,type)c->name = PL_ ## name;
414	/* but if it's missing the defav contents magically get replaced sometimes */	370	# include "state.h"
415	if (c->defav)	371	#undef VAR
416	av_reify (c->defav);
417
418	c->dowarn = PL_dowarn;
419	c->in_eval = PL_in_eval;
420
421	c->curstackinfo = PL_curstackinfo;
422	c->curstack = PL_curstack;
423	c->mainstack = PL_mainstack;
424	c->stack_sp = PL_stack_sp;
425	c->op = PL_op;
426	c->curpad = PL_curpad;
427	c->stack_base = PL_stack_base;
428	c->stack_max = PL_stack_max;
429	c->tmps_stack = PL_tmps_stack;
430	c->tmps_floor = PL_tmps_floor;
431	c->tmps_ix = PL_tmps_ix;
432	c->tmps_max = PL_tmps_max;
433	c->markstack = PL_markstack;
434	c->markstack_ptr = PL_markstack_ptr;
435	c->markstack_max = PL_markstack_max;
436	c->scopestack = PL_scopestack;
437	c->scopestack_ix = PL_scopestack_ix;
438	c->scopestack_max = PL_scopestack_max;
439	c->savestack = PL_savestack;
440	c->savestack_ix = PL_savestack_ix;
441	c->savestack_max = PL_savestack_max;
442	c->retstack = PL_retstack;
443	c->retstack_ix = PL_retstack_ix;
444	c->retstack_max = PL_retstack_max;
445	c->curcop = PL_curcop;
446	c->top_env = PL_top_env;
447	}	372	}
448		373
449	/*	374	/*
450	* allocate various perl stacks. This is an exact copy	375	* allocate various perl stacks. This is an exact copy
451	* of perl.c:init_stacks, except that it uses less memory	376	* of perl.c:init_stacks, except that it uses less memory
452	* on the assumption that coroutines do not usually need	377	* on the (sometimes correct) assumption that coroutines do
453	* a lot of stackspace.	378	* not usually need a lot of stackspace.
454	*/	379	*/
455	STATIC void	380	static void
456	coro_init_stacks (pTHX)	381	coro_init_stacks ()
457	{	382	{
458	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	383	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
459	PL_curstackinfo->si_type = PERLSI_MAIN;	384	PL_curstackinfo->si_type = PERLSI_MAIN;
460	PL_curstack = PL_curstackinfo->si_stack;	385	PL_curstack = PL_curstackinfo->si_stack;
461	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	386	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
471		396
472	New(54,PL_markstack,16,I32);	397	New(54,PL_markstack,16,I32);
473	PL_markstack_ptr = PL_markstack;	398	PL_markstack_ptr = PL_markstack;
474	PL_markstack_max = PL_markstack + 16;	399	PL_markstack_max = PL_markstack + 16;
475		400
		401	#ifdef SET_MARK_OFFSET
476	SET_MARK_OFFSET;	402	SET_MARK_OFFSET;
		403	#endif
477		404
478	New(54,PL_scopestack,16,I32);	405	New(54,PL_scopestack,16,I32);
479	PL_scopestack_ix = 0;	406	PL_scopestack_ix = 0;
480	PL_scopestack_max = 16;	407	PL_scopestack_max = 16;
481		408
482	New(54,PL_savestack,96,ANY);	409	New(54,PL_savestack,96,ANY);
483	PL_savestack_ix = 0;	410	PL_savestack_ix = 0;
484	PL_savestack_max = 96;	411	PL_savestack_max = 96;
485		412
		413	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	414	New(54,PL_retstack,8,OP*);
487	PL_retstack_ix = 0;	415	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	416	PL_retstack_max = 8;
		417	#endif
489	}	418	}
490		419
491	/*	420	/*
492	* destroy the stacks, the callchain etc...	421	* destroy the stacks, the callchain etc...
493	* still there is a memleak of 128 bytes...
494	*/	422	*/
495	STATIC void	423	static void
496	destroy_stacks(pTHX)	424	coro_destroy_stacks ()
497	{	425	{
		426	if (!IN_DESTRUCT)
		427	{
498	/* is this ugly, I ask? */	428	/* is this ugly, I ask? */
499	while (PL_scopestack_ix)	429	LEAVE_SCOPE (0);
500	LEAVE;
501		430
502	/* sure it is, but more important: is it correct?? :/ */	431	/* sure it is, but more important: is it correct?? :/ */
503	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504	FREETMPS;	432	FREETMPS;
		433
		434	/POPSTACK_TO (PL_mainstack);//D//use/
		435	}
505		436
506	while (PL_curstackinfo->si_next)	437	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;	438	PL_curstackinfo = PL_curstackinfo->si_next;
508		439
509	while (PL_curstackinfo)	440	while (PL_curstackinfo)
510	{	441	{
511	PERL_SI *p = PL_curstackinfo->si_prev;	442	PERL_SI *p = PL_curstackinfo->si_prev;
512		443
513	{	444	{ /D//remove/
514	dSP;	445	dSP;
515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	446	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516	PUTBACK; /* possibly superfluous */	447	PUTBACK; /* possibly superfluous */
517	}	448	}
518		449
519	if (PL_main_cv != Nullcv) /* don't during destruction. hack? */	450	if (!IN_DESTRUCT)
520	dounwind(-1);	451	{
521		452	dounwind (-1);/D//remove/
522	SvREFCNT_dec(PL_curstackinfo->si_stack);	453	SvREFCNT_dec (PL_curstackinfo->si_stack);
		454	}
		455
523	Safefree(PL_curstackinfo->si_cxstack);	456	Safefree (PL_curstackinfo->si_cxstack);
524	Safefree(PL_curstackinfo);	457	Safefree (PL_curstackinfo);
525	PL_curstackinfo = p;	458	PL_curstackinfo = p;
526	}	459	}
527		460
528	Safefree(PL_tmps_stack);	461	Safefree (PL_tmps_stack);
529	Safefree(PL_markstack);	462	Safefree (PL_markstack);
530	Safefree(PL_scopestack);	463	Safefree (PL_scopestack);
531	Safefree(PL_savestack);	464	Safefree (PL_savestack);
		465	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree(PL_retstack);	466	Safefree (PL_retstack);
533	}
534
535	static void
536	allocate_stack (Coro__State ctx, int alloc)
537	{
538	coro_stack *stack;
539
540	New (0, stack, 1, coro_stack);
541
542	stack->refcnt = 1;
543	stack->usecnt = 1;
544	stack->gencnt = ctx->gencnt = 0;
545	if (alloc)
546	{
547	#ifdef HAVE_MMAP
548	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
549	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);
550	if (stack->sptr == (void *)-1)
551	#endif	467	#endif
552	{
553	/FIXME//D//* reasonable stack size! */
554	stack->ssize = -4096 * sizeof (long);
555	New (0, stack->sptr, 4096, long);
556	}
557	}
558	else
559	stack->sptr = 0;
560
561	ctx->stack = stack;
562	}	468	}
563		469
564	static void	470	static void
565	deallocate_stack (Coro__State ctx)	471	setup_coro (struct coro *coro)
566	{
567	coro_stack *stack = ctx->stack;
568
569	ctx->stack = 0;
570
571	if (stack)
572	{
573	if (!--stack->refcnt)
574	{
575	#ifdef HAVE_MMAP
576	if (stack->ssize > 0 && stack->sptr)
577	munmap (stack->sptr, stack->ssize);
578	else
579	#else
580	Safefree (stack->sptr);
581	#endif
582	Safefree (stack);
583	}
584	else if (ctx->gencnt == stack->gencnt)
585	--stack->usecnt;
586	}
587	}
588
589	static void
590	setup_coro (void *arg)
591	{	472	{
592	/*	473	/*
593	* emulate part of the perl startup here.	474	* emulate part of the perl startup here.
594	*/	475	*/
		476
		477	coro_init_stacks ();
		478
		479	PL_curcop = 0;
		480	PL_in_eval = 0;
		481	PL_curpm = 0;
		482
		483	{
		484	dSP;
		485	LOGOP myop;
		486
		487	/* I have no idea why this is needed, but it is */
		488	PUSHMARK (SP);
		489
		490	SvREFCNT_dec (GvAV (PL_defgv));
		491	GvAV (PL_defgv) = coro->args; coro->args = 0;
		492
		493	Zero (&myop, 1, LOGOP);
		494	myop.op_next = Nullop;
		495	myop.op_flags = OPf_WANT_VOID;
		496
		497	PL_op = (OP *)&myop;
		498
		499	PUSHMARK (SP);
		500	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		501	PUTBACK;
		502	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		503	SPAGAIN;
		504
		505	ENTER; /* necessary e.g. for dounwind */
		506	}
		507	}
		508
		509	static void
		510	free_coro_mortal ()
		511	{
		512	if (coro_mortal)
		513	{
		514	SvREFCNT_dec (coro_mortal);
		515	coro_mortal = 0;
		516	}
		517	}
		518
		519	static void NOINLINE
		520	prepare_cctx (coro_cctx *cctx)
		521	{
595	dSP;	522	dSP;
596	Coro__State ctx = (Coro__State)arg;	523	LOGOP myop;
597	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
598		524
599	coro_init_stacks (aTHX);	525	Zero (&myop, 1, LOGOP);
600	/PL_curcop = 0;/	526	myop.op_next = PL_op;
601	/PL_in_eval = PL_in_eval;/ /* inherit */	527	myop.op_flags = OPf_WANT_VOID;
602	SvREFCNT_dec (GvAV (PL_defgv));
603	GvAV (PL_defgv) = ctx->args;
604		528
		529	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		530
		531	PUSHMARK (SP);
		532	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		533	PUTBACK;
		534	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
605	SPAGAIN;	535	SPAGAIN;
606
607	if (ctx->stack)
608	{
609	ctx->cursp = 0;
610
611	PUSHMARK(SP);
612	PUTBACK;
613	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
614
615	if (SvTRUE (ERRSV))
616	croak (NULL);
617	else
618	croak ("FATAL: CCTXT coroutine returned!");
619	}
620	else
621	{
622	UNOP myop;
623
624	PL_op = (OP *)&myop;
625
626	Zero(&myop, 1, UNOP);
627	myop.op_next = Nullop;
628	myop.op_flags = OPf_WANT_VOID;
629
630	PUSHMARK(SP);
631	XPUSHs (sub_init);
632	/*
633	* the next line is slightly wrong, as PL_op->op_next
634	* is actually being executed so we skip the first op.
635	* that doesn't matter, though, since it is only
636	* pp_nextstate and we never return...
637	* ah yes, and I don't care anyways ;)
638	*/
639	PUTBACK;
640	PL_op = pp_entersub();
641	SPAGAIN;
642
643	ENTER; /* necessary e.g. for dounwind */
644	}
645	}	536	}
646		537
647	static void	538	static void
648	continue_coro (void *arg)	539	coro_run (void *arg)
649	{	540	{
		541	/* coro_run is the alternative epilogue of transfer() */
		542	UNLOCK;
		543
650	/*	544	/*
651	* this is a _very_ stripped down perl interpreter ;)	545	* this is a _very_ stripped down perl interpreter ;)
652	*/	546	*/
653	Coro__State ctx = (Coro__State)arg;	547	PL_top_env = &PL_start_env;
654		548
655	/FIXME//* must set up top_env here */	549	/* inject call to cctx_init */
656	ctx->cursp = 0;	550	prepare_cctx ((coro_cctx *)arg);
657	PL_op = PL_op->op_next;
658	CALLRUNOPS(aTHX);
659		551
		552	/* somebody will hit me for both perl_run and PL_restartop */
		553	perl_run (PL_curinterp);
		554
		555	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
660	abort ();	556	abort ();
661	}	557	}
662		558
663	STATIC void	559	static coro_cctx *
		560	cctx_new ()
		561	{
		562	coro_cctx *cctx;
		563
		564	++cctx_count;
		565
		566	New (0, cctx, 1, coro_cctx);
		567
		568	#if HAVE_MMAP
		569
		570	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		571	/* mmap suppsedly does allocate-on-write for us */
		572	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		573
		574	if (cctx->sptr == (void *)-1)
		575	{
		576	perror ("FATAL: unable to mmap stack for coroutine");
		577	_exit (EXIT_FAILURE);
		578	}
		579
		580	# if STACKGUARD
		581	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		582	# endif
		583
		584	#else
		585
		586	cctx->ssize = STACKSIZE * (long)sizeof (long);
		587	New (0, cctx->sptr, STACKSIZE, long);
		588
		589	if (!cctx->sptr)
		590	{
		591	perror ("FATAL: unable to malloc stack for coroutine");
		592	_exit (EXIT_FAILURE);
		593	}
		594
		595	#endif
		596
		597	#if USE_VALGRIND
		598	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		599	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		600	cctx->ssize + (char *)cctx->sptr
		601	);
		602	#endif
		603
		604	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		605
		606	return cctx;
		607	}
		608
		609	static void
		610	cctx_free (coro_cctx *cctx)
		611	{
		612	if (!cctx)
		613	return;
		614
		615	--cctx_count;
		616
		617	#if USE_VALGRIND
		618	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		619	#endif
		620
		621	#if HAVE_MMAP
		622	munmap (cctx->sptr, cctx->ssize);
		623	#else
		624	Safefree (cctx->sptr);
		625	#endif
		626
		627	Safefree (cctx);
		628	}
		629
		630	static coro_cctx *
		631	cctx_get ()
		632	{
		633	coro_cctx *cctx;
		634
		635	if (cctx_first)
		636	{
		637	--cctx_idle;
		638	cctx = cctx_first;
		639	cctx_first = cctx->next;
		640	}
		641	else
		642	{
		643	cctx = cctx_new ();
		644	PL_op = PL_op->op_next;
		645	}
		646
		647	return cctx;
		648	}
		649
		650	static void
		651	cctx_put (coro_cctx *cctx)
		652	{
		653	++cctx_idle;
		654	cctx->next = cctx_first;
		655	cctx_first = cctx;
		656	}
		657
		658	/* never call directly, always through the coro_state_transfer global variable */
		659	static void NOINLINE
664	transfer(pTHX_ struct coro prev, struct coro next, int flags)	660	transfer (struct coro prev, struct coro next, int flags)
665	{	661	{
666	dSP;
667	dSTACKLEVEL;	662	dSTACKLEVEL;
668		663
		664	/* sometimes transfer is only called to set idle_sp */
		665	if (flags == TRANSFER_SET_STACKLEVEL)
		666	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
669	if (prev != next)	667	else if (prev != next)
670	{	668	{
		669	coro_cctx *prev__cctx;
		670
		671	LOCK;
		672
671	if (next->mainstack)	673	if (next->mainstack)
672	{	674	{
		675	/* coroutine already started */
673	SAVE (prev, flags);	676	SAVE (prev, flags);
674	LOAD (next);	677	LOAD (next);
675
676	/* mark this state as in-use */
677	next->mainstack = 0;
678	next->tmps_ix = -2;
679
680	/* stacklevel changed? if yes, grab the stack for us! */
681	if (flags & TRANSFER_SAVE_CCTXT)
682	{
683	if (!prev->stack)
684	allocate_stack (prev, 0);
685	else if (prev->cursp != stacklevel
686	&& prev->stack->usecnt > 1)
687	{
688	prev->gencnt = ++prev->stack->gencnt;
689	prev->stack->usecnt = 1;
690	}
691
692	/* has our stack been invalidated? */
693	if (next->stack && next->stack->gencnt != next->gencnt)
694	{
695	deallocate_stack (next);
696	allocate_stack (next, 1);
697	coro_create (&(next->stack->cctx),
698	continue_coro, (void *)next,
699	next->stack->sptr, labs (next->stack->ssize));
700	}
701
702	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
703	}
704
705	}	678	}
706	else if (next->tmps_ix == -2)
707	croak ("tried to transfer to running coroutine");
708	else	679	else
709	{	680	{
		681	/* need to start coroutine */
710	SAVE (prev, -1); /* first get rid of the old state */	682	/* first get rid of the old state */
711		683	SAVE (prev, -1);
712	if (flags & TRANSFER_SAVE_CCTXT)	684	/* setup coroutine call */
713	{
714	if (!prev->stack)
715	allocate_stack (prev, 0);
716
717	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
718	{
719	setup_coro (next);
720
721	prev->stack->refcnt++;
722	prev->stack->usecnt++;
723	next->stack = prev->stack;
724	next->gencnt = prev->gencnt;
725	}
726	else
727	{
728	allocate_stack (next, 1);
729	coro_create (&(next->stack->cctx),
730	setup_coro, (void *)next,
731	next->stack->sptr, labs (next->stack->ssize));
732	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733	}
734	}
735	else
736	setup_coro (next);	685	setup_coro (next);
		686	/* need a stack */
		687	next->cctx = 0;
737	}	688	}
		689
		690	if (!prev->cctx)
		691	/* create a new empty context */
		692	Newz (0, prev->cctx, 1, coro_cctx);
		693
		694	prev__cctx = prev->cctx;
		695
		696	/* possibly "free" the cctx */
		697	if (prev__cctx->idle_sp == STACKLEVEL)
		698	{
		699	cctx_put (prev__cctx);
		700	prev->cctx = 0;
		701	}
		702
		703	if (!next->cctx)
		704	next->cctx = cctx_get ();
		705
		706	if (prev__cctx != next->cctx)
		707	{
		708	prev__cctx->top_env = PL_top_env;
		709	PL_top_env = next->cctx->top_env;
		710	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		711	}
		712
		713	free_coro_mortal ();
		714
		715	UNLOCK;
738	}	716	}
739
740	next->cursp = stacklevel;
741	}	717	}
		718
		719	struct transfer_args
		720	{
		721	struct coro prev, next;
		722	int flags;
		723	};
		724
		725	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		726
		727	static void
		728	coro_state_destroy (struct coro *coro)
		729	{
		730	if (coro->refcnt--)
		731	return;
		732
		733	if (coro->mainstack && coro->mainstack != main_mainstack)
		734	{
		735	struct coro temp;
		736
		737	SAVE ((&temp), TRANSFER_SAVE_ALL);
		738	LOAD (coro);
		739
		740	coro_destroy_stacks ();
		741
		742	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		743
		744	coro->mainstack = 0;
		745	}
		746
		747	cctx_free (coro->cctx);
		748	SvREFCNT_dec (coro->args);
		749	Safefree (coro);
		750	}
		751
		752	static int
		753	coro_state_clear (pTHX_ SV sv, MAGIC mg)
		754	{
		755	struct coro coro = (struct coro )mg->mg_ptr;
		756	mg->mg_ptr = 0;
		757
		758	coro_state_destroy (coro);
		759
		760	return 0;
		761	}
		762
		763	static int
		764	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		765	{
		766	struct coro coro = (struct coro )mg->mg_ptr;
		767
		768	++coro->refcnt;
		769
		770	return 0;
		771	}
		772
		773	static MGVTBL coro_state_vtbl = {
		774	0, 0, 0, 0,
		775	coro_state_clear,
		776	0,
		777	#ifdef MGf_DUP
		778	coro_state_dup,
		779	#else
		780	# define MGf_DUP 0
		781	#endif
		782	};
742		783
743	static struct coro *	784	static struct coro *
744	sv_to_coro (SV arg, const char funcname, const char *varname)	785	SvSTATE (SV *coro)
745	{	786	{
746	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	787	HV *stash;
		788	MAGIC *mg;
		789
		790	if (SvROK (coro))
		791	coro = SvRV (coro);
		792
		793	stash = SvSTASH (coro);
		794	if (stash != coro_stash && stash != coro_state_stash)
747	{	795	{
748	HE he = hv_fetch_ent((HV )SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);	796	/* very slow, but rare, check */
749		797	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
750	if (!he)	798	croak ("Coro::State object required");
751	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
752
753	arg = HeVAL(he);
754	}	799	}
755
756	/* must also be changed inside Coro::Cont::yield */
757	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
758	return (struct coro ) SvIV((SV)SvRV(arg));
759	else
760	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);
761	}
762		800
		801	mg = SvMAGIC (coro);
		802	assert (mg->mg_type == PERL_MAGIC_ext);
		803	return (struct coro *)mg->mg_ptr;
		804	}
		805
763	static void	806	static void
		807	prepare_transfer (struct transfer_args ta, SV prev, SV *next, int flags)
		808	{
		809	ta->prev = SvSTATE (prev);
		810	ta->next = SvSTATE (next);
		811	ta->flags = flags;
		812	}
		813
		814	static void
764	api_transfer(pTHX_ SV prev, SV next, int flags)	815	api_transfer (SV prev, SV next, int flags)
765	{	816	{
766	transfer(aTHX_ sv_to_coro (prev, "Coro::transfer", "prev"),	817	dTHX;
767	sv_to_coro (next, "Coro::transfer", "next"),	818	struct transfer_args ta;
768	flags);	819
		820	prepare_transfer (&ta, prev, next, flags);
		821	TRANSFER (ta);
769	}	822	}
770		823
771	/ Coro ******************************************************************/	824	/ Coro ******************************************************************/
772		825
773	#define PRIO_MAX 3	826	#define PRIO_MAX 3
…		…
777	#define PRIO_IDLE -3	830	#define PRIO_IDLE -3
778	#define PRIO_MIN -4	831	#define PRIO_MIN -4
779		832
780	/* for Coro.pm */	833	/* for Coro.pm */
781	static GV coro_current, coro_idle;	834	static GV coro_current, coro_idle;
782	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	835	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		836	static int coro_nready;
783		837
784	static void	838	static void
785	coro_enq (SV *sv)	839	coro_enq (SV *sv)
786	{	840	{
787	if (SvROK (sv))	841	int prio;
788	{	842
789	SV *hv = SvRV (sv);
790	if (SvTYPE (hv) == SVt_PVHV)	843	if (SvTYPE (sv) != SVt_PVHV)
791	{
792	SV *xprio = hv_fetch ((HV )hv, "prio", 4, 0);
793	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
794
795	prio = prio > PRIO_MAX ? PRIO_MAX
796	: prio < PRIO_MIN ? PRIO_MIN
797	: prio;
798
799	av_push (coro_ready [prio - PRIO_MIN], sv);
800
801	return;
802	}
803	}
804
805	croak ("Coro::ready tried to enqueue something that is not a coroutine");	844	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		845
		846	prio = SvSTATE (sv)->prio;
		847
		848	av_push (coro_ready [prio - PRIO_MIN], sv);
		849	coro_nready++;
806	}	850	}
807		851
808	static SV *	852	static SV *
809	coro_deq (int min_prio)	853	coro_deq (int min_prio)
810	{	854	{
…		…
813	min_prio -= PRIO_MIN;	857	min_prio -= PRIO_MIN;
814	if (min_prio < 0)	858	if (min_prio < 0)
815	min_prio = 0;	859	min_prio = 0;
816		860
817	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	861	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
818	if (av_len (coro_ready[prio]) >= 0)	862	if (AvFILLp (coro_ready [prio]) >= 0)
		863	{
		864	coro_nready--;
819	return av_shift (coro_ready[prio]);	865	return av_shift (coro_ready [prio]);
		866	}
820		867
821	return 0;	868	return 0;
822	}	869	}
823		870
824	static void	871	static void
825	api_ready (SV *coro)	872	api_ready (SV *coro)
826	{	873	{
		874	dTHX;
		875
		876	if (SvROK (coro))
		877	coro = SvRV (coro);
		878
		879	LOCK;
827	coro_enq (SvREFCNT_inc (coro));	880	coro_enq (SvREFCNT_inc (coro));
		881	UNLOCK;
828	}	882	}
829		883
830	static void	884	static void
831	api_schedule (int cede)	885	prepare_schedule (struct transfer_args *ta)
832	{	886	{
833	SV prev, next;	887	SV current, prev, *next;
834		888
835	prev = GvSV (coro_current);	889	current = GvSV (coro_current);
836		890
837	if (cede)	891	for (;;)
838	coro_enq (SvREFCNT_inc (prev));	892	{
839		893	LOCK;
840	next = coro_deq (PRIO_MIN);	894	next = coro_deq (PRIO_MIN);
		895	UNLOCK;
841		896
842	if (!next)	897	if (next)
843	next = SvREFCNT_inc (GvSV (coro_idle));	898	break;
844		899
845	GvSV (coro_current) = SvREFCNT_inc (next);	900	{
846	transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"),	901	dSP;
847	sv_to_coro (next, "Coro::schedule", "next coroutine"),	902
848	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);	903	ENTER;
849	SvREFCNT_dec (next);	904	SAVETMPS;
850	SvREFCNT_dec (prev);	905
		906	PUSHMARK (SP);
		907	PUTBACK;
		908	call_sv (GvSV (coro_idle), G_DISCARD);
		909
		910	FREETMPS;
		911	LEAVE;
		912	}
		913	}
		914
		915	prev = SvRV (current);
		916	SvRV (current) = next;
		917
		918	/* free this only after the transfer */
		919	LOCK;
		920	free_coro_mortal ();
		921	UNLOCK;
		922	coro_mortal = prev;
		923
		924	ta->prev = SvSTATE (prev);
		925	ta->next = SvSTATE (next);
		926	ta->flags = TRANSFER_SAVE_ALL;
		927	}
		928
		929	static void
		930	prepare_cede (struct transfer_args *ta)
		931	{
		932	LOCK;
		933	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		934	UNLOCK;
		935
		936	prepare_schedule (ta);
		937	}
		938
		939	static void
		940	api_schedule (void)
		941	{
		942	dTHX;
		943	struct transfer_args ta;
		944
		945	prepare_schedule (&ta);
		946	TRANSFER (ta);
		947	}
		948
		949	static void
		950	api_cede (void)
		951	{
		952	dTHX;
		953	struct transfer_args ta;
		954
		955	prepare_cede (&ta);
		956	TRANSFER (ta);
851	}	957	}
852		958
853	MODULE = Coro::State PACKAGE = Coro::State	959	MODULE = Coro::State PACKAGE = Coro::State
854		960
855	PROTOTYPES: ENABLE	961	PROTOTYPES: DISABLE
856		962
857	BOOT:	963	BOOT:
858	{ /* {} necessary for stoopid perl-5.6.x */	964	{
859	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	965	#ifdef USE_ITHREADS
860	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	966	MUTEX_INIT (&coro_mutex);
		967	#endif
		968	BOOT_PAGESIZE;
		969
861	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	970	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
862		971
863	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	972	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
864	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	973	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
865	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	974	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
866	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
867
868	if (!padlist_cache)
869	padlist_cache = newHV ();
870		975
871	main_mainstack = PL_mainstack;	976	main_mainstack = PL_mainstack;
872		977
873	{
874	SV *sv = perl_get_sv("Coro::API", 1);
875
876	coroapi.ver = CORO_API_VERSION - 1;	978	coroapi.ver = CORO_API_VERSION;
877	coroapi.transfer = api_transfer;	979	coroapi.transfer = api_transfer;
878	coroapi.schedule = api_schedule;
879	coroapi.ready = api_ready;
880		980
881	GCoroAPI = &coroapi;	981	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
882	sv_setiv(sv, (IV)&coroapi);
883	SvREADONLY_on(sv);
884	}
885	}	982	}
886		983
887	Coro::State	984	SV *
888	_newprocess(args)	985	new (char *klass, ...)
889	SV * args
890	PROTOTYPE: $
891	CODE:	986	CODE:
892	Coro__State coro;	987	{
		988	struct coro *coro;
		989	HV *hv;
		990	int i;
893		991
894	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
895	croak ("Coro::State::_newprocess expects an arrayref");
896
897	New (0, coro, 1, struct coro);	992	Newz (0, coro, 1, struct coro);
		993	coro->args = newAV ();
898		994
899	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	995	hv = newHV ();
900	coro->mainstack = 0; /* actual work is done inside transfer */	996	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
901	coro->stack = 0;	997	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
902		998
903	RETVAL = coro;	999	for (i = 1; i < items; i++)
		1000	av_push (coro->args, newSVsv (ST (i)));
		1001	}
904	OUTPUT:	1002	OUTPUT:
905	RETVAL	1003	RETVAL
906		1004
907	void	1005	void
908	transfer(prev, next, flags)	1006	_set_stacklevel (...)
909	Coro::State_or_hashref prev	1007	ALIAS:
910	Coro::State_or_hashref next	1008	Coro::State::transfer = 1
911	int flags	1009	Coro::schedule = 2
912	PROTOTYPE: @	1010	Coro::cede = 3
		1011	Coro::Cont::yield = 4
913	CODE:	1012	CODE:
914	PUTBACK;	1013	{
915	transfer (aTHX_ prev, next, flags);	1014	struct transfer_args ta;
916	SPAGAIN;	1015
		1016	switch (ix)
		1017	{
		1018	case 0:
		1019	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1020	ta.next = 0;
		1021	ta.flags = TRANSFER_SET_STACKLEVEL;
		1022	break;
		1023
		1024	case 1:
		1025	if (items != 3)
		1026	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1027
		1028	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1029	break;
		1030
		1031	case 2:
		1032	prepare_schedule (&ta);
		1033	break;
		1034
		1035	case 3:
		1036	prepare_cede (&ta);
		1037	break;
		1038
		1039	case 4:
		1040	{
		1041	SV *yieldstack;
		1042	SV *sv;
		1043	AV *defav = GvAV (PL_defgv);
		1044
		1045	yieldstack = *hv_fetch (
		1046	(HV *)SvRV (GvSV (coro_current)),
		1047	"yieldstack", sizeof ("yieldstack") - 1,
		1048	0
		1049	);
		1050
		1051	/* set up @_ -- ugly */
		1052	av_clear (defav);
		1053	av_fill (defav, items - 1);
		1054	while (items--)
		1055	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1056
		1057	sv = av_pop ((AV *)SvRV (yieldstack));
		1058	ta.prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
		1059	ta.next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
		1060	ta.flags = 0;
		1061	SvREFCNT_dec (sv);
		1062	}
		1063	break;
		1064
		1065	}
		1066
		1067	TRANSFER (ta);
		1068	}
917		1069
918	void	1070	void
919	DESTROY(coro)	1071	_clone_state_from (SV dst, SV src)
920	Coro::State coro	1072	CODE:
921	CODE:	1073	{
		1074	struct coro *coro_src = SvSTATE (src);
922		1075
923	if (coro->mainstack && coro->mainstack != main_mainstack)	1076	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
924	{
925	struct coro temp;
926		1077
927	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1078	++coro_src->refcnt;
928	LOAD(aTHX_ coro);	1079	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
929		1080	}
930	destroy_stacks (aTHX);
931
932	LOAD((&temp)); /* this will get rid of defsv etc.. */
933
934	coro->mainstack = 0;
935	}
936
937	deallocate_stack (coro);
938
939	Safefree (coro);
940		1081
941	void	1082	void
942	flush()
943	CODE:
944	#ifdef MAY_FLUSH
945	flush_padlist_cache ();
946	#endif
947
948	void
949	_exit(code)	1083	_exit (code)
950	int code	1084	int code
951	PROTOTYPE: $	1085	PROTOTYPE: $
952	CODE:	1086	CODE:
953	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
954	_exit (code);	1087	_exit (code);
955	#else
956	signal (SIGTERM, SIG_DFL);
957	raise (SIGTERM);
958	exit (code);
959	#endif
960		1088
961	MODULE = Coro::State PACKAGE = Coro::Cont	1089	int
		1090	cctx_count ()
		1091	CODE:
		1092	RETVAL = cctx_count;
		1093	OUTPUT:
		1094	RETVAL
962		1095
963	# this is slightly dirty (should expose a c-level api)	1096	int
964		1097	cctx_idle ()
965	void	1098	CODE:
966	yield(...)	1099	RETVAL = cctx_idle;
967	PROTOTYPE: @	1100	OUTPUT:
968	CODE:	1101	RETVAL
969	static SV *returnstk;
970	SV *sv;
971	AV *defav = GvAV (PL_defgv);
972	struct coro prev, next;
973
974	if (!returnstk)
975	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
976
977	/* set up @_ -- ugly */
978	av_clear (defav);
979	av_fill (defav, items - 1);
980	while (items--)
981	av_store (defav, items, SvREFCNT_inc (ST(items)));
982
983	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
984	sv = av_pop ((AV *)SvRV (returnstk));
985	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
986	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
987	SvREFCNT_dec (sv);
988
989	transfer(aTHX_ prev, next, 0);
990		1102
991	MODULE = Coro::State PACKAGE = Coro	1103	MODULE = Coro::State PACKAGE = Coro
992		1104
993	# this is slightly dirty (should expose a c-level api)
994
995	BOOT:	1105	BOOT:
996	{	1106	{
997	int i;	1107	int i;
		1108
998	HV *stash = gv_stashpv ("Coro", TRUE);	1109	coro_stash = gv_stashpv ("Coro", TRUE);
999		1110
1000	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1111	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1001	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1112	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1002	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1113	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1003	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1114	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1004	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1115	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1005	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1116	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1006		1117
1007	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1118	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1008	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1119	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1009		1120
1010	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1121	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1011	coro_ready[i] = newAV ();	1122	coro_ready[i] = newAV ();
		1123
		1124	{
		1125	SV *sv = perl_get_sv("Coro::API", 1);
		1126
		1127	coroapi.schedule = api_schedule;
		1128	coroapi.cede = api_cede;
		1129	coroapi.ready = api_ready;
		1130	coroapi.nready = &coro_nready;
		1131	coroapi.current = coro_current;
		1132
		1133	GCoroAPI = &coroapi;
		1134	sv_setiv (sv, (IV)&coroapi);
		1135	SvREADONLY_on (sv);
		1136	}
		1137	}
		1138
		1139	int
		1140	prio (Coro::State coro, int newprio = 0)
		1141	ALIAS:
		1142	nice = 1
		1143	CODE:
		1144	{
		1145	RETVAL = coro->prio;
		1146
		1147	if (items > 1)
		1148	{
		1149	if (ix)
		1150	newprio += coro->prio;
		1151
		1152	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1153	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1154
		1155	coro->prio = newprio;
		1156	}
1012	}	1157	}
1013		1158
1014	void	1159	void
1015	ready(self)	1160	ready (SV *self)
1016	SV * self	1161	PROTOTYPE: $
1017	CODE:	1162	CODE:
1018	api_ready (self);	1163	api_ready (self);
1019		1164
		1165	int
		1166	nready (...)
		1167	PROTOTYPE:
		1168	CODE:
		1169	RETVAL = coro_nready;
		1170	OUTPUT:
		1171	RETVAL
		1172
		1173	MODULE = Coro::State PACKAGE = Coro::AIO
		1174
		1175	SV *
		1176	_get_state ()
		1177	CODE:
		1178	{
		1179	struct {
		1180	int errorno;
		1181	int laststype;
		1182	int laststatval;
		1183	Stat_t statcache;
		1184	} data;
		1185
		1186	data.errorno = errno;
		1187	data.laststype = PL_laststype;
		1188	data.laststatval = PL_laststatval;
		1189	data.statcache = PL_statcache;
		1190
		1191	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1192	}
		1193	OUTPUT:
		1194	RETVAL
		1195
1020	void	1196	void
1021	schedule(...)	1197	_set_state (char *data_)
1022	ALIAS:	1198	PROTOTYPE: $
1023	cede = 1
1024	CODE:	1199	CODE:
1025	api_schedule (ix);	1200	{
		1201	struct {
		1202	int errorno;
		1203	int laststype;
		1204	int laststatval;
		1205	Stat_t statcache;
		1206	} data = (void )data_;
1026		1207
		1208	errno = data->errorno;
		1209	PL_laststype = data->laststype;
		1210	PL_laststatval = data->laststatval;
		1211	PL_statcache = data->statcache;
		1212	}

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Comparing Coro/Coro/State.xs (file contents): Revision 1.24 by root, Tue Aug 14 14:56:22 2001 UTC vs. Revision 1.109 by root, Mon Nov 27 18:45:29 2006 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.24 by root, Tue Aug 14 14:56:22 2001 UTC vs.
Revision 1.109 by root, Mon Nov 27 18:45:29 2006 UTC