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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.58 by pcg, Fri May 14 13:25:09 2004 UTC vs.
Revision 1.121 by root, Sat Dec 2 20:40:25 2006 UTC

…		…
1	#define PERL_NO_GET_CONTEXT	1	#include "libcoro/coro.c"
2		2
3	#include "EXTERN.h"	3	#include "EXTERN.h"
4	#include "perl.h"	4	#include "perl.h"
5	#include "XSUB.h"	5	#include "XSUB.h"
6		6
7	#include "patchlevel.h"	7	#include "patchlevel.h"
8		8
9	#if PATCHLEVEL < 6	9	#if USE_VALGRIND
		10	# include <valgrind/valgrind.h>
		11	#endif
		12
		13	/* the maximum number of idle cctx that will be pooled */
		14	#define MAX_IDLE_CCTX 8
		15
		16	#define PERL_VERSION_ATLEAST(a,b,c) \
		17	(PERL_REVISION > (a) \
		18	\|\| (PERL_REVISION == (a) \
		19	&& (PERL_VERSION > (b) \
		20	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		21
		22	#if !PERL_VERSION_ATLEAST (5,6,0)
10	# ifndef PL_ppaddr	23	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	24	# define PL_ppaddr ppaddr
12	# endif	25	# endif
13	# ifndef call_sv	26	# ifndef call_sv
14	# define call_sv perl_call_sv	27	# define call_sv perl_call_sv
25	# ifndef IS_PADCONST	38	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	39	# define IS_PADCONST(v) 0
27	# endif	40	# endif
28	#endif	41	#endif
29		42
30	#include "libcoro/coro.c"
31
32	#include <signal.h>	43	#include <stdio.h>
		44	#include <errno.h>
		45
		46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		47	# undef STACKGUARD
		48	#endif
		49
		50	#ifndef STACKGUARD
		51	# define STACKGUARD 0
		52	#endif
33		53
34	#ifdef HAVE_MMAP	54	#ifdef HAVE_MMAP
35	# include <unistd.h>	55	# include <unistd.h>
36	# include <sys/mman.h>	56	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS	57	# ifndef MAP_ANONYMOUS
…		…
39	# define MAP_ANONYMOUS MAP_ANON	59	# define MAP_ANONYMOUS MAP_ANON
40	# else	60	# else
41	# undef HAVE_MMAP	61	# undef HAVE_MMAP
42	# endif	62	# endif
43	# endif	63	# endif
		64	# include <limits.h>
		65	# ifndef PAGESIZE
		66	# define PAGESIZE pagesize
		67	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		68	static long pagesize;
		69	# else
		70	# define BOOT_PAGESIZE (void)0
44	#endif	71	# endif
45		72	#else
46	#define SUB_INIT "Coro::State::initialize"	73	# define PAGESIZE 0
47	#define UCORO_STATE "_coro_state"	74	# define BOOT_PAGESIZE (void)0
		75	#endif
48		76
49	/* The next macro should declare a variable stacklevel that contains and approximation	77	/* The next macro should declare a variable stacklevel that contains and approximation
50	* to the current C stack pointer. Its property is that it changes with each call	78	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	79	* and should be unique. */
		80	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	81	#define STACKLEVEL ((void *)&stacklevel)
53		82
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	83	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		84
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	85	#if __GNUC__ >= 3
		86	# define attribute(x) __attribute__(x)
		87	#else
		88	# define attribute(x)
		89	#endif
		90
		91	#define NOINLINE attribute ((noinline))
57		92
58	#include "CoroAPI.h"	93	#include "CoroAPI.h"
		94
		95	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59		96
60	#ifdef USE_ITHREADS	97	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	98	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	99	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	100	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	101	#else
65	# define LOCK 0	102	# define LOCK (void)0
66	# define UNLOCK 0	103	# define UNLOCK (void)0
67	#endif	104	#endif
		105
		106	struct io_state
		107	{
		108	int errorno;
		109	I32 laststype;
		110	int laststatval;
		111	Stat_t statcache;
		112	};
68		113
69	static struct CoroAPI coroapi;	114	static struct CoroAPI coroapi;
70	static AV main_mainstack; / used to differentiate between $main and others */	115	static AV main_mainstack; / used to differentiate between $main and others */
71	static HV *coro_state_stash;	116	static HV coro_state_stash, coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV coro_mortal; / will be freed after next transfer */	117	static SV coro_mortal; / will be freed after next transfer */
75		118
76	/* this is actually not only the c stack but also c registers etc... */	119	static struct coro_cctx *cctx_first;
		120	static int cctx_count, cctx_idle;
		121
		122	/* this is a structure representing a c-level coroutine */
77	typedef struct {	123	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	124	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		125
82	coro_context cctx;	126	/* the stack */
83
84	void *sptr;	127	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	128	long ssize; /* positive == mmap, otherwise malloc */
86	} coro_stack;
87		129
		130	/* cpu state */
		131	void idle_sp; / sp of top-level transfer/schedule/cede call */
		132	JMPENV *top_env;
		133	coro_context cctx;
		134
		135	int inuse;
		136
		137	#if USE_VALGRIND
		138	int valgrind_id;
		139	#endif
		140	} coro_cctx;
		141
		142	enum {
		143	CF_RUNNING = 0x0001, /* coroutine is running */
		144	CF_READY = 0x0002, /* coroutine is ready */
		145	CF_NEW = 0x0004, /* ahs never been switched to */
		146	};
		147
		148	/* this is a structure representing a perl-level coroutine */
88	struct coro {	149	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	150	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	151	coro_cctx *cctx;
91		152
92	/* the optional C context */	153	/* data associated with this coroutine (initial args) */
93	coro_stack *stack;	154	AV *args;
94	void *cursp;
95	int gencnt;	155	int refcnt;
		156	int flags;
96		157
97	/* optionally saved, might be zero */	158	/* optionally saved, might be zero */
98	AV *defav;	159	AV *defav;
99	SV *defsv;	160	SV *defsv;
100	SV *errsv;	161	SV *errsv;
101		162
102	/* saved global state not related to stacks */	163	#define VAR(name,type) type name;
103	U8 dowarn;	164	# include "state.h"
104	I32 in_eval;	165	#undef VAR
105		166
106	/* the stacks and related info (callchain etc..) */	167	/* coro process data */
107	PERL_SI *curstackinfo;	168	int prio;
108	AV *curstack;
109	AV *mainstack;
110	SV **stack_sp;
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	SV **stack_base;
115	SV **stack_max;
116	SV **tmps_stack;
117	I32 tmps_floor;
118	I32 tmps_ix;
119	I32 tmps_max;
120	I32 *markstack;
121	I32 *markstack_ptr;
122	I32 *markstack_max;
123	I32 *scopestack;
124	I32 scopestack_ix;
125	I32 scopestack_max;
126	ANY *savestack;
127	I32 savestack_ix;
128	I32 savestack_max;
129	OP **retstack;
130	I32 retstack_ix;
131	I32 retstack_max;
132	COP *curcop;
133	JMPENV *top_env;
134
135	/* data associated with this coroutine (initial args) */
136	AV *args;
137	};	169	};
138		170
139	typedef struct coro *Coro__State;	171	typedef struct coro *Coro__State;
140	typedef struct coro *Coro__State_or_hashref;	172	typedef struct coro *Coro__State_or_hashref;
141		173
142	/* mostly copied from op.c:cv_clone2 */	174	static AV *
143	STATIC AV *	175	coro_clone_padlist (CV *cv)
144	clone_padlist (pTHX_ AV *protopadlist)
145	{	176	{
146	AV *av;	177	AV *padlist = CvPADLIST (cv);
147	I32 ix;
148	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
149	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
150	SV **pname = AvARRAY (protopad_name);
151	SV **ppad = AvARRAY (protopad);
152	I32 fname = AvFILLp (protopad_name);
153	I32 fpad = AvFILLp (protopad);
154	AV newpadlist, newpad_name, *newpad;	178	AV newpadlist, newpad;
155	SV **npad;
156
157	newpad_name = newAV ();
158	for (ix = fname; ix >= 0; ix--)
159	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161	newpad = newAV ();
162	av_fill (newpad, AvFILLp (protopad));
163	npad = AvARRAY (newpad);
164		179
165	newpadlist = newAV ();	180	newpadlist = newAV ();
166	AvREAL_off (newpadlist);	181	AvREAL_off (newpadlist);
167	av_store (newpadlist, 0, (SV *) newpad_name);	182	#if PERL_VERSION_ATLEAST (5,9,0)
		183	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		184	#else
		185	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		186	#endif
		187	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		188	--AvFILLp (padlist);
		189
		190	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
168	av_store (newpadlist, 1, (SV *) newpad);	191	av_store (newpadlist, 1, (SV *)newpad);
169
170	av = newAV (); /* will be @_ */
171	av_extend (av, 0);
172	av_store (newpad, 0, (SV *) av);
173	AvFLAGS (av) = AVf_REIFY;
174
175	for (ix = fpad; ix > 0; ix--)
176	{
177	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
178
179	if (namesv && namesv != &PL_sv_undef)
180	{
181	char name = SvPVX (namesv); / XXX */
182
183	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')
184	{ /* lexical from outside? */
185	npad[ix] = SvREFCNT_inc (ppad[ix]);
186	}
187	else
188	{ /* our own lexical */
189	SV *sv;
190	if (*name == '&')
191	sv = SvREFCNT_inc (ppad[ix]);
192	else if (*name == '@')
193	sv = (SV *) newAV ();
194	else if (*name == '%')
195	sv = (SV *) newHV ();
196	else
197	sv = NEWSV (0, 0);
198
199	#ifdef SvPADBUSY
200	if (!SvPADBUSY (sv))
201	#endif
202	SvPADMY_on (sv);
203
204	npad[ix] = sv;
205	}
206	}
207	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
208	{
209	npad[ix] = SvREFCNT_inc (ppad[ix]);
210	}
211	else
212	{
213	SV *sv = NEWSV (0, 0);
214	SvPADTMP_on (sv);
215	npad[ix] = sv;
216	}
217	}
218
219	#if 0 /* return -ENOTUNDERSTOOD */
220	/* Now that vars are all in place, clone nested closures. */
221
222	for (ix = fpad; ix > 0; ix--) {
223	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224	if (namesv
225	&& namesv != &PL_sv_undef
226	&& !(SvFLAGS(namesv) & SVf_FAKE)
227	&& *SvPVX(namesv) == '&'
228	&& CvCLONE(ppad[ix]))
229	{
230	CV kid = cv_clone((CV)ppad[ix]);
231	SvREFCNT_dec(ppad[ix]);
232	CvCLONE_on(kid);
233	SvPADMY_on(kid);
234	npad[ix] = (SV*)kid;
235	}
236	}
237	#endif
238		192
239	return newpadlist;	193	return newpadlist;
240	}	194	}
241		195
242	STATIC void	196	static void
243	free_padlist (pTHX_ AV *padlist)	197	free_padlist (AV *padlist)
244	{	198	{
245	/* may be during global destruction */	199	/* may be during global destruction */
246	if (SvREFCNT (padlist))	200	if (SvREFCNT (padlist))
247	{	201	{
248	I32 i = AvFILLp (padlist);	202	I32 i = AvFILLp (padlist);
…		…
261		215
262	SvREFCNT_dec ((SV*)padlist);	216	SvREFCNT_dec ((SV*)padlist);
263	}	217	}
264	}	218	}
265		219
266	STATIC int	220	static int
267	coro_cv_free (pTHX_ SV sv, MAGIC mg)	221	coro_cv_free (pTHX_ SV sv, MAGIC mg)
268	{	222	{
269	AV *padlist;	223	AV *padlist;
270	AV av = (AV )mg->mg_obj;	224	AV av = (AV )mg->mg_obj;
271		225
272	/* casting is fun. */	226	/* casting is fun. */
273	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	227	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
274	free_padlist (aTHX_ padlist);	228	free_padlist (padlist);
		229
		230	SvREFCNT_dec (av);
		231
		232	return 0;
275	}	233	}
276		234
277	#define PERL_MAGIC_coro PERL_MAGIC_ext	235	#define PERL_MAGIC_coro PERL_MAGIC_ext
278		236
279	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	237	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
280		238
		239	#define CORO_MAGIC(cv) \
		240	SvMAGIC (cv) \
		241	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		242	? SvMAGIC (cv) \
		243	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		244	: 0
		245
281	/* the next two functions merely cache the padlists */	246	/* the next two functions merely cache the padlists */
282	STATIC void	247	static void
283	get_padlist (pTHX_ CV *cv)	248	get_padlist (CV *cv)
284	{	249	{
285	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	250	MAGIC *mg = CORO_MAGIC (cv);
		251	AV *av;
286		252
287	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	253	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
288	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	254	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
289	else	255	else
		256	{
		257	#if 0
		258	/* this is probably cleaner, but also slower? */
		259	CV *cp = Perl_cv_clone (cv);
		260	CvPADLIST (cv) = CvPADLIST (cp);
		261	CvPADLIST (cp) = 0;
		262	SvREFCNT_dec (cp);
		263	#else
290	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	264	CvPADLIST (cv) = coro_clone_padlist (cv);
		265	#endif
		266	}
291	}	267	}
292		268
293	STATIC void	269	static void
294	put_padlist (pTHX_ CV *cv)	270	put_padlist (CV *cv)
295	{	271	{
296	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	272	MAGIC *mg = CORO_MAGIC (cv);
		273	AV *av;
297		274
298	if (!mg)	275	if (!mg)
299	{	276	{
300	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	277	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
301	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	278	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
302	mg->mg_virtual = &vtbl_coro;	279	mg->mg_virtual = &vtbl_coro;
303	mg->mg_obj = (SV *)newAV ();	280	mg->mg_obj = (SV *)newAV ();
304	}	281	}
305		282
306	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	283	av = (AV *)mg->mg_obj;
		284
		285	if (AvFILLp (av) >= AvMAX (av))
		286	av_extend (av, AvMAX (av) + 1);
		287
		288	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
307	}	289	}
308		290
309	#define SB do {	291	#define SB do {
310	#define SE } while (0)	292	#define SE } while (0)
311		293
312	#define LOAD(state) load_state(aTHX_ (state));	294	#define LOAD(state) load_state ((state))
313	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	295	#define SAVE(state,flags) save_state ((state),(flags))
314		296
315	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	297	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
316		298
317	static void	299	static void
318	load_state(pTHX_ Coro__State c)	300	load_state (Coro__State c)
319	{	301	{
320	PL_dowarn = c->dowarn;	302	#define VAR(name,type) PL_ ## name = c->name;
321	PL_in_eval = c->in_eval;	303	# include "state.h"
322		304	#undef VAR
323	PL_curstackinfo = c->curstackinfo;
324	PL_curstack = c->curstack;
325	PL_mainstack = c->mainstack;
326	PL_stack_sp = c->stack_sp;
327	PL_op = c->op;
328	PL_curpad = c->curpad;
329	PL_comppad = c->comppad;
330	PL_stack_base = c->stack_base;
331	PL_stack_max = c->stack_max;
332	PL_tmps_stack = c->tmps_stack;
333	PL_tmps_floor = c->tmps_floor;
334	PL_tmps_ix = c->tmps_ix;
335	PL_tmps_max = c->tmps_max;
336	PL_markstack = c->markstack;
337	PL_markstack_ptr = c->markstack_ptr;
338	PL_markstack_max = c->markstack_max;
339	PL_scopestack = c->scopestack;
340	PL_scopestack_ix = c->scopestack_ix;
341	PL_scopestack_max = c->scopestack_max;
342	PL_savestack = c->savestack;
343	PL_savestack_ix = c->savestack_ix;
344	PL_savestack_max = c->savestack_max;
345	PL_retstack = c->retstack;
346	PL_retstack_ix = c->retstack_ix;
347	PL_retstack_max = c->retstack_max;
348	PL_curcop = c->curcop;
349	PL_top_env = c->top_env;
350		305
351	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
352	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
353	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
354		309
…		…
357	CV *cv;	312	CV *cv;
358		313
359	/* now do the ugly restore mess */	314	/* now do the ugly restore mess */
360	while ((cv = (CV *)POPs))	315	while ((cv = (CV *)POPs))
361	{	316	{
362	AV padlist = (AV )POPs;
363
364	if (padlist)
365	{
366	put_padlist (aTHX_ cv); /* mark this padlist as available */	317	put_padlist (cv); /* mark this padlist as available */
367	CvPADLIST(cv) = padlist;	318	CvDEPTH (cv) = PTR2IV (POPs);
368	}	319	CvPADLIST (cv) = (AV *)POPs;
369
370	++CvDEPTH(cv);
371	}	320	}
372		321
373	PUTBACK;	322	PUTBACK;
374	}	323	}
375	}	324	}
376		325
377	static void	326	static void
378	save_state(pTHX_ Coro__State c, int flags)	327	save_state (Coro__State c, int flags)
379	{	328	{
380	{	329	{
381	dSP;	330	dSP;
382	I32 cxix = cxstack_ix;	331	I32 cxix = cxstack_ix;
383	PERL_CONTEXT *ccstk = cxstack;	332	PERL_CONTEXT *ccstk = cxstack;
…		…
394	{	343	{
395	while (cxix >= 0)	344	while (cxix >= 0)
396	{	345	{
397	PERL_CONTEXT *cx = &ccstk[cxix--];	346	PERL_CONTEXT *cx = &ccstk[cxix--];
398		347
399	if (CxTYPE(cx) == CXt_SUB)	348	if (CxTYPE (cx) == CXt_SUB)
400	{	349	{
401	CV *cv = cx->blk_sub.cv;	350	CV *cv = cx->blk_sub.cv;
		351
402	if (CvDEPTH(cv))	352	if (CvDEPTH (cv))
403	{	353	{
404	EXTEND (SP, CvDEPTH(cv)*2);	354	EXTEND (SP, 3);
405		355
406	while (--CvDEPTH(cv))
407	{
408	/* this tells the restore code to increment CvDEPTH */
409	PUSHs (Nullsv);
410	PUSHs ((SV *)cv);
411	}
412
413	PUSHs ((SV *)CvPADLIST(cv));	356	PUSHs ((SV *)CvPADLIST (cv));
		357	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
414	PUSHs ((SV *)cv);	358	PUSHs ((SV *)cv);
415		359
416	get_padlist (aTHX_ cv); /* this is a monster */	360	CvDEPTH (cv) = 0;
		361	get_padlist (cv);
417	}	362	}
418	}	363	}
419	#ifdef CXt_FORMAT	364	#ifdef CXt_FORMAT
420	else if (CxTYPE(cx) == CXt_FORMAT)	365	else if (CxTYPE (cx) == CXt_FORMAT)
421	{	366	{
422	/* I never used formats, so how should I know how these are implemented? */	367	/* I never used formats, so how should I know how these are implemented? */
423	/* my bold guess is as a simple, plain sub... */	368	/* my bold guess is as a simple, plain sub... */
424	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	369	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
425	}	370	}
…		…
439		384
440	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	385	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
441	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	386	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
442	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	387	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
443		388
444	c->dowarn = PL_dowarn;	389	#define VAR(name,type)c->name = PL_ ## name;
445	c->in_eval = PL_in_eval;	390	# include "state.h"
446		391	#undef VAR
447	c->curstackinfo = PL_curstackinfo;
448	c->curstack = PL_curstack;
449	c->mainstack = PL_mainstack;
450	c->stack_sp = PL_stack_sp;
451	c->op = PL_op;
452	c->curpad = PL_curpad;
453	c->comppad = PL_comppad;
454	c->stack_base = PL_stack_base;
455	c->stack_max = PL_stack_max;
456	c->tmps_stack = PL_tmps_stack;
457	c->tmps_floor = PL_tmps_floor;
458	c->tmps_ix = PL_tmps_ix;
459	c->tmps_max = PL_tmps_max;
460	c->markstack = PL_markstack;
461	c->markstack_ptr = PL_markstack_ptr;
462	c->markstack_max = PL_markstack_max;
463	c->scopestack = PL_scopestack;
464	c->scopestack_ix = PL_scopestack_ix;
465	c->scopestack_max = PL_scopestack_max;
466	c->savestack = PL_savestack;
467	c->savestack_ix = PL_savestack_ix;
468	c->savestack_max = PL_savestack_max;
469	c->retstack = PL_retstack;
470	c->retstack_ix = PL_retstack_ix;
471	c->retstack_max = PL_retstack_max;
472	c->curcop = PL_curcop;
473	c->top_env = PL_top_env;
474	}	392	}
475		393
476	/*	394	/*
477	* allocate various perl stacks. This is an exact copy	395	* allocate various perl stacks. This is an exact copy
478	* of perl.c:init_stacks, except that it uses less memory	396	* of perl.c:init_stacks, except that it uses less memory
479	* on the (sometimes correct) assumption that coroutines do	397	* on the (sometimes correct) assumption that coroutines do
480	* not usually need a lot of stackspace.	398	* not usually need a lot of stackspace.
481	*/	399	*/
482	STATIC void	400	static void
483	coro_init_stacks (pTHX)	401	coro_init_stacks ()
484	{	402	{
485	LOCK;
486
487	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	403	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
488	PL_curstackinfo->si_type = PERLSI_MAIN;	404	PL_curstackinfo->si_type = PERLSI_MAIN;
489	PL_curstack = PL_curstackinfo->si_stack;	405	PL_curstack = PL_curstackinfo->si_stack;
490	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	406	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
491		407
492	PL_stack_base = AvARRAY(PL_curstack);	408	PL_stack_base = AvARRAY(PL_curstack);
493	PL_stack_sp = PL_stack_base;	409	PL_stack_sp = PL_stack_base;
494	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	410	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
495		411
496	New(50,PL_tmps_stack,96,SV*);	412	New(50,PL_tmps_stack,128,SV*);
497	PL_tmps_floor = -1;	413	PL_tmps_floor = -1;
498	PL_tmps_ix = -1;	414	PL_tmps_ix = -1;
499	PL_tmps_max = 96;	415	PL_tmps_max = 128;
500		416
501	New(54,PL_markstack,16,I32);	417	New(54,PL_markstack,32,I32);
502	PL_markstack_ptr = PL_markstack;	418	PL_markstack_ptr = PL_markstack;
503	PL_markstack_max = PL_markstack + 16;	419	PL_markstack_max = PL_markstack + 32;
504		420
505	#ifdef SET_MARK_OFFSET	421	#ifdef SET_MARK_OFFSET
506	SET_MARK_OFFSET;	422	SET_MARK_OFFSET;
507	#endif	423	#endif
508		424
509	New(54,PL_scopestack,16,I32);	425	New(54,PL_scopestack,32,I32);
510	PL_scopestack_ix = 0;	426	PL_scopestack_ix = 0;
511	PL_scopestack_max = 16;	427	PL_scopestack_max = 32;
512		428
513	New(54,PL_savestack,96,ANY);	429	New(54,PL_savestack,64,ANY);
514	PL_savestack_ix = 0;	430	PL_savestack_ix = 0;
515	PL_savestack_max = 96;	431	PL_savestack_max = 64;
516		432
		433	#if !PERL_VERSION_ATLEAST (5,9,0)
517	New(54,PL_retstack,8,OP*);	434	New(54,PL_retstack,16,OP*);
518	PL_retstack_ix = 0;	435	PL_retstack_ix = 0;
519	PL_retstack_max = 8;	436	PL_retstack_max = 16;
520		437	#endif
521	UNLOCK;
522	}	438	}
523		439
524	/*	440	/*
525	* destroy the stacks, the callchain etc...	441	* destroy the stacks, the callchain etc...
526	*/	442	*/
527	STATIC void	443	static void
528	destroy_stacks(pTHX)	444	coro_destroy_stacks ()
529	{	445	{
530	if (!IN_DESTRUCT)	446	if (!IN_DESTRUCT)
531	{	447	{
532	/* is this ugly, I ask? */	448	/* is this ugly, I ask? */
533	LEAVE_SCOPE (0);	449	LEAVE_SCOPE (0);
…		…
564		480
565	Safefree (PL_tmps_stack);	481	Safefree (PL_tmps_stack);
566	Safefree (PL_markstack);	482	Safefree (PL_markstack);
567	Safefree (PL_scopestack);	483	Safefree (PL_scopestack);
568	Safefree (PL_savestack);	484	Safefree (PL_savestack);
		485	#if !PERL_VERSION_ATLEAST (5,9,0)
569	Safefree (PL_retstack);	486	Safefree (PL_retstack);
570	}
571
572	static void
573	allocate_stack (Coro__State ctx, int alloc)
574	{
575	coro_stack *stack;
576
577	New (0, stack, 1, coro_stack);
578
579	stack->refcnt = 1;
580	stack->usecnt = 1;
581	stack->gencnt = ctx->gencnt = 0;
582
583	if (alloc)
584	{
585	#if HAVE_MMAP
586	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
587	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
588	if (stack->sptr == (void *)-1)
589	#endif	487	#endif
590	{
591	/FIXME//D//* reasonable stack size! */
592	stack->ssize = - (8192 * sizeof (long));
593	New (0, stack->sptr, 8192, long);
594	}
595	}
596	else
597	stack->sptr = 0;
598
599	ctx->stack = stack;
600	}	488	}
601		489
602	static void	490	static void
603	deallocate_stack (Coro__State ctx)	491	setup_coro (struct coro *coro)
604	{
605	coro_stack *stack = ctx->stack;
606
607	ctx->stack = 0;
608
609	if (stack)
610	{
611	if (!--stack->refcnt)
612	{
613	#ifdef HAVE_MMAP
614	if (stack->ssize > 0 && stack->sptr)
615	munmap (stack->sptr, stack->ssize);
616	else
617	#endif
618	Safefree (stack->sptr);
619
620	Safefree (stack);
621	}
622	else if (ctx->gencnt == stack->gencnt)
623	--stack->usecnt;
624	}
625	}
626
627	static void
628	setup_coro (void *arg)
629	{	492	{
630	/*	493	/*
631	* emulate part of the perl startup here.	494	* emulate part of the perl startup here.
632	*/	495	*/
633	dTHX;
634	dSP;
635	Coro__State ctx = (Coro__State)arg;
636	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
637		496
638	coro_init_stacks (aTHX);	497	coro_init_stacks ();
639	/PL_curcop = 0;/	498
640	/PL_in_eval = PL_in_eval;/ /* inherit */	499	PL_curcop = &PL_compiling;
		500	PL_in_eval = EVAL_NULL;
		501	PL_curpm = 0;
		502	PL_localizing = 0;
		503	PL_dirty = 0;
		504	PL_restartop = 0;
		505
		506	{
		507	dSP;
		508	LOGOP myop;
		509
641	SvREFCNT_dec (GvAV (PL_defgv));	510	SvREFCNT_dec (GvAV (PL_defgv));
642	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	511	GvAV (PL_defgv) = coro->args; coro->args = 0;
643		512
644	SPAGAIN;
645
646	if (ctx->stack)
647	{
648	ctx->cursp = 0;
649
650	PUSHMARK(SP);
651	PUTBACK;
652	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
653
654	if (SvTRUE (ERRSV))
655	croak (NULL);
656	else
657	croak ("FATAL: CCTXT coroutine returned!");
658	}
659	else
660	{
661	UNOP myop;
662
663	PL_op = (OP *)&myop;
664
665	Zero(&myop, 1, UNOP);	513	Zero (&myop, 1, LOGOP);
666	myop.op_next = Nullop;	514	myop.op_next = Nullop;
667	myop.op_flags = OPf_WANT_VOID;	515	myop.op_flags = OPf_WANT_VOID;
668		516
669	PUSHMARK(SP);	517	PUSHMARK (SP);
670	XPUSHs (sub_init);	518	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
671	/*
672	* the next line is slightly wrong, as PL_op->op_next
673	* is actually being executed so we skip the first op.
674	* that doesn't matter, though, since it is only
675	* pp_nextstate and we never return...
676	* ah yes, and I don't care anyways ;)
677	*/
678	PUTBACK;	519	PUTBACK;
		520	PL_op = (OP *)&myop;
679	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	521	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
680	SPAGAIN;	522	SPAGAIN;
		523	}
681		524
682	ENTER; /* necessary e.g. for dounwind */	525	ENTER; /* necessary e.g. for dounwind */
683	}
684	}	526	}
685		527
686	static void	528	static void
687	continue_coro (void *arg)	529	free_coro_mortal ()
688	{	530	{
689	/*
690	* this is a _very_ stripped down perl interpreter ;)
691	*/
692	dTHX;
693	Coro__State ctx = (Coro__State)arg;
694	JMPENV coro_start_env;
695
696	PL_top_env = &ctx->start_env;
697
698	ctx->cursp = 0;
699	PL_op = PL_op->op_next;
700	CALLRUNOPS(aTHX);
701
702	abort ();
703	}
704
705	STATIC void
706	transfer (pTHX_ struct coro prev, struct coro next, int flags)
707	{
708	dSTACKLEVEL;
709
710	if (prev != next)
711	{
712	if (next->mainstack)
713	{
714	LOCK;
715	SAVE (prev, flags);
716	LOAD (next);
717	UNLOCK;
718
719	/* mark this state as in-use */
720	next->mainstack = 0;
721	next->tmps_ix = -2;
722
723	/* stacklevel changed? if yes, grab the stack for us! */
724	if (flags & TRANSFER_SAVE_CCTXT)
725	{
726	if (!prev->stack)
727	allocate_stack (prev, 0);
728	else if (prev->cursp != stacklevel
729	&& prev->stack->usecnt > 1)
730	{
731	prev->gencnt = ++prev->stack->gencnt;
732	prev->stack->usecnt = 1;
733	}
734
735	/* has our stack been invalidated? */
736	if (next->stack && next->stack->gencnt != next->gencnt)
737	{
738	deallocate_stack (next);
739	allocate_stack (next, 1);
740	coro_create (&(next->stack->cctx),
741	continue_coro, (void *)next,
742	next->stack->sptr, labs (next->stack->ssize));
743	}
744
745	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
746	prev->cursp = stacklevel;
747	/* don't add any code here */
748	}
749	else
750	next->cursp = stacklevel;
751	}
752	else if (next->tmps_ix == -2)
753	croak ("tried to transfer to running coroutine");
754	else
755	{
756	LOCK;
757	SAVE (prev, -1); /* first get rid of the old state */
758	UNLOCK;
759
760	if (flags & TRANSFER_SAVE_CCTXT)
761	{
762	if (!prev->stack)
763	allocate_stack (prev, 0);
764
765	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
766	{
767	PL_top_env = &next->start_env;
768
769	setup_coro (next);
770	next->cursp = stacklevel;
771
772	prev->stack->refcnt++;
773	prev->stack->usecnt++;
774	next->stack = prev->stack;
775	next->gencnt = prev->gencnt;
776	}
777	else
778	{
779	assert (!next->stack);
780	allocate_stack (next, 1);
781	coro_create (&(next->stack->cctx),
782	setup_coro, (void *)next,
783	next->stack->sptr, labs (next->stack->ssize));
784	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
785	prev->cursp = stacklevel;
786	/* don't add any code here */
787	}
788	}
789	else
790	{
791	setup_coro (next);
792	next->cursp = stacklevel;
793	}
794	}
795	}
796
797	LOCK;
798	if (coro_mortal)	531	if (coro_mortal)
799	{	532	{
800	SvREFCNT_dec (coro_mortal);	533	SvREFCNT_dec (coro_mortal);
801	coro_mortal = 0;	534	coro_mortal = 0;
802	}	535	}
		536	}
		537
		538	/* inject a fake call to Coro::State::_cctx_init into the execution */
		539	static void NOINLINE
		540	prepare_cctx (coro_cctx *cctx)
		541	{
		542	dSP;
		543	LOGOP myop;
		544
		545	Zero (&myop, 1, LOGOP);
		546	myop.op_next = PL_op;
		547	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		548
		549	PUSHMARK (SP);
		550	EXTEND (SP, 2);
		551	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		552	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		553	PUTBACK;
		554	PL_op = (OP *)&myop;
		555	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		556	SPAGAIN;
		557	}
		558
		559	static void
		560	coro_run (void *arg)
		561	{
		562	/* coro_run is the alternative tail of transfer(), so unlock here. */
803	UNLOCK;	563	UNLOCK;
804	}
805		564
806	#define SV_CORO(sv,func) \	565	/*
807	do { \	566	* this is a _very_ stripped down perl interpreter ;)
808	if (SvROK (sv)) \	567	*/
809	sv = SvRV (sv); \	568	PL_top_env = &PL_start_env;
810	\
811	if (SvTYPE (sv) == SVt_PVHV) \
812	{ \
813	HE he = hv_fetch_ent ((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
814	\
815	if (!he) \
816	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
817	\
818	(sv) = SvRV (HeVAL(he)); \
819	} \
820	\
821	/* must also be changed inside Coro::Cont::yield */ \
822	if (!SvOBJECT (sv) \|\| SvSTASH (sv) != coro_state_stash) \
823	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
824	\
825	} while(0)
826		569
827	#define SvSTATE(sv) (struct coro *)SvIV (sv)	570	/* inject call to cctx_init */
		571	prepare_cctx ((coro_cctx *)arg);
828		572
		573	/* somebody will hit me for both perl_run and PL_restartop */
		574	PL_restartop = PL_op;
		575	perl_run (PL_curinterp);
		576
		577	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		578	abort ();
		579	}
		580
		581	static coro_cctx *
		582	cctx_new ()
		583	{
		584	coro_cctx *cctx;
		585
		586	++cctx_count;
		587
		588	New (0, cctx, 1, coro_cctx);
		589
		590	#if HAVE_MMAP
		591
		592	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		593	/* mmap supposedly does allocate-on-write for us */
		594	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		595
		596	if (cctx->sptr == (void *)-1)
		597	{
		598	perror ("FATAL: unable to mmap stack for coroutine");
		599	_exit (EXIT_FAILURE);
		600	}
		601
		602	# if STACKGUARD
		603	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		604	# endif
		605
		606	#else
		607
		608	cctx->ssize = STACKSIZE * (long)sizeof (long);
		609	New (0, cctx->sptr, STACKSIZE, long);
		610
		611	if (!cctx->sptr)
		612	{
		613	perror ("FATAL: unable to malloc stack for coroutine");
		614	_exit (EXIT_FAILURE);
		615	}
		616
		617	#endif
		618
		619	#if USE_VALGRIND
		620	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		621	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		622	cctx->ssize + (char *)cctx->sptr
		623	);
		624	#endif
		625
		626	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		627
		628	return cctx;
		629	}
		630
		631	static void
		632	cctx_destroy (coro_cctx *cctx)
		633	{
		634	if (!cctx)
		635	return;
		636
		637	--cctx_count;
		638
		639	#if USE_VALGRIND
		640	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		641	#endif
		642
		643	#if HAVE_MMAP
		644	munmap (cctx->sptr, cctx->ssize);
		645	#else
		646	Safefree (cctx->sptr);
		647	#endif
		648
		649	Safefree (cctx);
		650	}
		651
		652	static coro_cctx *
		653	cctx_get ()
		654	{
		655	coro_cctx *cctx;
		656
		657	if (cctx_first)
		658	{
		659	cctx = cctx_first;
		660	cctx_first = cctx->next;
		661	--cctx_idle;
		662	}
		663	else
		664	{
		665	cctx = cctx_new ();
		666	PL_op = PL_op->op_next;
		667	}
		668
		669	return cctx;
		670	}
		671
		672	static void
		673	cctx_put (coro_cctx *cctx)
		674	{
		675	/* free another cctx if overlimit */
		676	if (cctx_idle >= MAX_IDLE_CCTX)
		677	{
		678	coro_cctx *first = cctx_first;
		679	cctx_first = first->next;
		680	--cctx_idle;
		681
		682	assert (!first->inuse);
		683	cctx_destroy (first);
		684	}
		685
		686	++cctx_idle;
		687	cctx->next = cctx_first;
		688	cctx_first = cctx;
		689	}
		690
		691	/* never call directly, always through the coro_state_transfer global variable */
		692	static void NOINLINE
		693	transfer (struct coro prev, struct coro next, int flags)
		694	{
		695	dSTACKLEVEL;
		696
		697	/* sometimes transfer is only called to set idle_sp */
		698	if (flags == TRANSFER_SET_STACKLEVEL)
		699	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		700	else if (prev != next)
		701	{
		702	coro_cctx *prev__cctx;
		703
		704	if (prev->flags & CF_NEW)
		705	{
		706	/* create a new empty context */
		707	Newz (0, prev->cctx, 1, coro_cctx);
		708	prev->cctx->inuse = 1;
		709	prev->flags &= ~CF_NEW;
		710	prev->flags \|= CF_RUNNING;
		711	}
		712
		713	/TODO: must not croak here /
		714	if (!prev->flags & CF_RUNNING)
		715	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		716
		717	if (next->flags & CF_RUNNING)
		718	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		719
		720	prev->flags &= ~CF_RUNNING;
		721	next->flags \|= CF_RUNNING;
		722
		723	LOCK;
		724
		725	if (next->flags & CF_NEW)
		726	{
		727	/* need to start coroutine */
		728	next->flags &= ~CF_NEW;
		729	/* first get rid of the old state */
		730	SAVE (prev, -1);
		731	/* setup coroutine call */
		732	setup_coro (next);
		733	/* need a new stack */
		734	assert (!next->stack);
		735	}
		736	else
		737	{
		738	/* coroutine already started */
		739	SAVE (prev, flags);
		740	LOAD (next);
		741	}
		742
		743	prev__cctx = prev->cctx;
		744
		745	/* possibly "free" the cctx */
		746	if (prev__cctx->idle_sp == STACKLEVEL)
		747	{
		748	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		749	assert (PL_top_env == prev__cctx->top_env);
		750
		751	prev->cctx = 0;
		752
		753	cctx_put (prev__cctx);
		754	prev__cctx->inuse = 0;
		755	}
		756
		757	if (!next->cctx)
		758	{
		759	next->cctx = cctx_get ();
		760	assert (!next->cctx->inuse);
		761	next->cctx->inuse = 1;
		762	}
		763
		764	if (prev__cctx != next->cctx)
		765	{
		766	prev__cctx->top_env = PL_top_env;
		767	PL_top_env = next->cctx->top_env;
		768	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		769	}
		770
		771	free_coro_mortal ();
		772
		773	UNLOCK;
		774	}
		775	}
		776
		777	struct transfer_args
		778	{
		779	struct coro prev, next;
		780	int flags;
		781	};
		782
		783	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		784
		785	static void
		786	coro_state_destroy (struct coro *coro)
		787	{
		788	if (coro->refcnt--)
		789	return;
		790
		791	if (coro->mainstack && coro->mainstack != main_mainstack)
		792	{
		793	struct coro temp;
		794
		795	if (coro->flags & CF_RUNNING)
		796	croak ("FATAL: tried to destroy currently running coroutine");
		797
		798	SAVE ((&temp), TRANSFER_SAVE_ALL);
		799	LOAD (coro);
		800
		801	coro_destroy_stacks ();
		802
		803	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		804
		805	coro->mainstack = 0;
		806	}
		807
		808	cctx_destroy (coro->cctx);
		809	SvREFCNT_dec (coro->args);
		810	Safefree (coro);
		811	}
		812
829	static void	813	static int
		814	coro_state_clear (pTHX_ SV sv, MAGIC mg)
		815	{
		816	struct coro coro = (struct coro )mg->mg_ptr;
		817	mg->mg_ptr = 0;
		818
		819	coro_state_destroy (coro);
		820
		821	return 0;
		822	}
		823
		824	static int
		825	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		826	{
		827	struct coro coro = (struct coro )mg->mg_ptr;
		828
		829	++coro->refcnt;
		830
		831	return 0;
		832	}
		833
		834	static MGVTBL coro_state_vtbl = {
		835	0, 0, 0, 0,
		836	coro_state_clear,
		837	0,
		838	#ifdef MGf_DUP
		839	coro_state_dup,
		840	#else
		841	# define MGf_DUP 0
		842	#endif
		843	};
		844
		845	static struct coro *
		846	SvSTATE (SV *coro)
		847	{
		848	HV *stash;
		849	MAGIC *mg;
		850
		851	if (SvROK (coro))
		852	coro = SvRV (coro);
		853
		854	stash = SvSTASH (coro);
		855	if (stash != coro_stash && stash != coro_state_stash)
		856	{
		857	/* very slow, but rare, check */
		858	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		859	croak ("Coro::State object required");
		860	}
		861
		862	mg = SvMAGIC (coro);
		863	assert (mg->mg_type == PERL_MAGIC_ext);
		864	return (struct coro *)mg->mg_ptr;
		865	}
		866
		867	static void
		868	prepare_transfer (struct transfer_args ta, SV prev, SV *next, int flags)
		869	{
		870	ta->prev = SvSTATE (prev);
		871	ta->next = SvSTATE (next);
		872	ta->flags = flags;
		873	}
		874
		875	static void
830	api_transfer(pTHX_ SV prev, SV next, int flags)	876	api_transfer (SV prev, SV next, int flags)
831	{	877	{
832	SV_CORO (prev, "Coro::transfer");	878	struct transfer_args ta;
833	SV_CORO (next, "Coro::transfer");
834		879
835	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	880	prepare_transfer (&ta, prev, next, flags);
		881	TRANSFER (ta);
836	}	882	}
837		883
838	/ Coro ******************************************************************/	884	/ Coro ******************************************************************/
839		885
840	#define PRIO_MAX 3	886	#define PRIO_MAX 3
…		…
843	#define PRIO_LOW -1	889	#define PRIO_LOW -1
844	#define PRIO_IDLE -3	890	#define PRIO_IDLE -3
845	#define PRIO_MIN -4	891	#define PRIO_MIN -4
846		892
847	/* for Coro.pm */	893	/* for Coro.pm */
848	static GV coro_current, coro_idle;	894	static SV *coro_current;
849	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	895	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
850	static int coro_nready;	896	static int coro_nready;
851		897
852	static void	898	static void
853	coro_enq (pTHX_ SV *sv)	899	coro_enq (SV *coro_sv)
854	{	900	{
855	if (SvTYPE (sv) == SVt_PVHV)
856	{
857	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
858	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
859
860	prio = prio > PRIO_MAX ? PRIO_MAX
861	: prio < PRIO_MIN ? PRIO_MIN
862	: prio;
863
864	av_push (coro_ready [prio - PRIO_MIN], sv);	901	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
865	coro_nready++;	902	coro_nready++;
866
867	return;
868	}
869
870	croak ("Coro::ready tried to enqueue something that is not a coroutine");
871	}	903	}
872		904
873	static SV *	905	static SV *
874	coro_deq (pTHX_ int min_prio)	906	coro_deq (int min_prio)
875	{	907	{
876	int prio = PRIO_MAX - PRIO_MIN;	908	int prio = PRIO_MAX - PRIO_MIN;
877		909
878	min_prio -= PRIO_MIN;	910	min_prio -= PRIO_MIN;
879	if (min_prio < 0)	911	if (min_prio < 0)
880	min_prio = 0;	912	min_prio = 0;
881		913
882	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	914	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
883	if (av_len (coro_ready[prio]) >= 0)	915	if (AvFILLp (coro_ready [prio]) >= 0)
884	{	916	{
885	coro_nready--;	917	coro_nready--;
886	return av_shift (coro_ready[prio]);	918	return av_shift (coro_ready [prio]);
887	}	919	}
888		920
889	return 0;	921	return 0;
890	}	922	}
891		923
892	static void	924	static int
893	api_ready (SV *coro)	925	api_ready (SV *coro_sv)
894	{	926	{
895	dTHX;	927	struct coro *coro;
896		928
897	if (SvROK (coro))	929	if (SvROK (coro_sv))
898	coro = SvRV (coro);	930	coro_sv = SvRV (coro_sv);
		931
		932	coro = SvSTATE (coro_sv);
		933
		934	if (coro->flags & CF_READY)
		935	return 0;
		936
		937	#if 0 /* this is actually harmless */
		938	if (coro->flags & CF_RUNNING)
		939	croak ("Coro::ready called on currently running coroutine");
		940	#endif
		941
		942	coro->flags \|= CF_READY;
899		943
900	LOCK;	944	LOCK;
901	coro_enq (aTHX_ SvREFCNT_inc (coro));	945	coro_enq (SvREFCNT_inc (coro_sv));
902	UNLOCK;	946	UNLOCK;
		947
		948	return 1;
		949	}
		950
		951	static int
		952	api_is_ready (SV *coro_sv)
		953	{
		954	return !!SvSTATE (coro_sv)->flags & CF_READY;
		955	}
		956
		957	static void
		958	prepare_schedule (struct transfer_args *ta)
		959	{
		960	SV prev, next;
		961
		962	for (;;)
		963	{
		964	LOCK;
		965	next = coro_deq (PRIO_MIN);
		966	UNLOCK;
		967
		968	if (next)
		969	break;
		970
		971	{
		972	dSP;
		973
		974	ENTER;
		975	SAVETMPS;
		976
		977	PUSHMARK (SP);
		978	PUTBACK;
		979	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		980
		981	FREETMPS;
		982	LEAVE;
		983	}
		984	}
		985
		986	prev = SvRV (coro_current);
		987	SvRV_set (coro_current, next);
		988
		989	/* free this only after the transfer */
		990	LOCK;
		991	free_coro_mortal ();
		992	UNLOCK;
		993	coro_mortal = prev;
		994
		995	assert (!SvROK(prev));//D
		996	assert (!SvROK(next));//D
		997
		998	ta->prev = SvSTATE (prev);
		999	ta->next = SvSTATE (next);
		1000	ta->flags = TRANSFER_SAVE_ALL;
		1001
		1002	assert (ta->flags & CF_READY);
		1003	ta->next->flags &= ~CF_READY;
		1004	}
		1005
		1006	static void
		1007	prepare_cede (struct transfer_args *ta)
		1008	{
		1009	api_ready (coro_current);
		1010
		1011	prepare_schedule (ta);
903	}	1012	}
904		1013
905	static void	1014	static void
906	api_schedule (void)	1015	api_schedule (void)
907	{	1016	{
908	dTHX;	1017	struct transfer_args ta;
909		1018
910	SV prev, next;	1019	prepare_schedule (&ta);
911		1020	TRANSFER (ta);
912	LOCK;
913
914	prev = SvRV (GvSV (coro_current));
915	next = coro_deq (aTHX_ PRIO_MIN);
916
917	if (!next)
918	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
919
920	/* free this only after the transfer */
921	coro_mortal = prev;
922	SV_CORO (prev, "Coro::schedule");
923
924	SvRV (GvSV (coro_current)) = next;
925
926	SV_CORO (next, "Coro::schedule");
927
928	UNLOCK;
929
930	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
931	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
932	}	1021	}
933		1022
934	static void	1023	static void
935	api_cede (void)	1024	api_cede (void)
936	{	1025	{
937	dTHX;	1026	struct transfer_args ta;
938		1027
939	LOCK;	1028	prepare_cede (&ta);
940	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1029	TRANSFER (ta);
941	UNLOCK;
942
943	api_schedule ();
944	}	1030	}
945		1031
946	MODULE = Coro::State PACKAGE = Coro::State	1032	MODULE = Coro::State PACKAGE = Coro::State
947		1033
948	PROTOTYPES: ENABLE	1034	PROTOTYPES: DISABLE
949		1035
950	BOOT:	1036	BOOT:
951	{ /* {} necessary for stoopid perl-5.6.x */	1037	{
952	#ifdef USE_ITHREADS	1038	#ifdef USE_ITHREADS
953	MUTEX_INIT (&coro_mutex);	1039	MUTEX_INIT (&coro_mutex);
954	#endif	1040	#endif
		1041	BOOT_PAGESIZE;
955		1042
956	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
957	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
958	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1043	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
959		1044
960	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1045	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
961	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1046	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
962	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1047	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
963	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
964		1048
965	main_mainstack = PL_mainstack;	1049	main_mainstack = PL_mainstack;
966		1050
967	coroapi.ver = CORO_API_VERSION;	1051	coroapi.ver = CORO_API_VERSION;
968	coroapi.transfer = api_transfer;	1052	coroapi.transfer = api_transfer;
969	}
970		1053
971	Coro::State	1054	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
972	_newprocess(args)	1055	}
973	SV * args	1056
974	PROTOTYPE: $	1057	SV *
		1058	new (char *klass, ...)
975	CODE:	1059	CODE:
976	Coro__State coro;	1060	{
		1061	struct coro *coro;
		1062	HV *hv;
		1063	int i;
977		1064
978	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
979	croak ("Coro::State::_newprocess expects an arrayref");
980
981	Newz (0, coro, 1, struct coro);	1065	Newz (0, coro, 1, struct coro);
		1066	coro->args = newAV ();
		1067	coro->flags = CF_NEW;
982		1068
983	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1069	hv = newHV ();
984	coro->mainstack = 0; /* actual work is done inside transfer */	1070	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
985	coro->stack = 0;	1071	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
986		1072
987	/* same as JMPENV_BOOTSTRAP */	1073	for (i = 1; i < items; i++)
988	/* we might be able to recycle start_env, but safe is safe */	1074	av_push (coro->args, newSVsv (ST (i)));
989	//Zero(&coro->start_env, 1, JMPENV);	1075	}
990	coro->start_env.je_ret = -1;
991	coro->start_env.je_mustcatch = TRUE;
992
993	RETVAL = coro;
994	OUTPUT:	1076	OUTPUT:
995	RETVAL	1077	RETVAL
996		1078
997	void	1079	void
998	transfer(prev, next, flags)	1080	_set_stacklevel (...)
999	SV *prev	1081	ALIAS:
1000	SV *next	1082	Coro::State::transfer = 1
1001	int flags	1083	Coro::schedule = 2
1002	PROTOTYPE: @	1084	Coro::cede = 3
1003	CODE:	1085	CODE:
1004	PUTBACK;	1086	{
1005	SV_CORO (next, "Coro::transfer");	1087	struct transfer_args ta;
1006	SV_CORO (prev, "Coro::transfer");	1088
1007	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1089	switch (ix)
1008	SPAGAIN;	1090	{
		1091	case 0:
		1092	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1093	ta.next = 0;
		1094	ta.flags = TRANSFER_SET_STACKLEVEL;
		1095	break;
		1096
		1097	case 1:
		1098	if (items != 3)
		1099	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);
		1100
		1101	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1102	break;
		1103
		1104	case 2:
		1105	prepare_schedule (&ta);
		1106	break;
		1107
		1108	case 3:
		1109	prepare_cede (&ta);
		1110	break;
		1111	}
		1112
		1113	TRANSFER (ta);
		1114	}
1009		1115
1010	void	1116	void
1011	DESTROY(coro)	1117	_clone_state_from (SV dst, SV src)
1012	Coro::State coro	1118	CODE:
1013	CODE:	1119	{
		1120	struct coro *coro_src = SvSTATE (src);
1014		1121
1015	if (coro->mainstack && coro->mainstack != main_mainstack)	1122	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1016	{
1017	struct coro temp;
1018		1123
1019	PUTBACK;	1124	++coro_src->refcnt;
1020	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1125	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1021	LOAD(aTHX_ coro);	1126	}
1022	SPAGAIN;
1023
1024	destroy_stacks (aTHX);
1025
1026	LOAD((&temp)); /* this will get rid of defsv etc.. */
1027	SPAGAIN;
1028
1029	coro->mainstack = 0;
1030	}
1031
1032	deallocate_stack (coro);
1033	SvREFCNT_dec (coro->args);
1034	Safefree (coro);
1035		1127
1036	void	1128	void
1037	_exit(code)	1129	_exit (code)
1038	int code	1130	int code
1039	PROTOTYPE: $	1131	PROTOTYPE: $
1040	CODE:	1132	CODE:
1041	_exit (code);	1133	_exit (code);
1042		1134
1043	MODULE = Coro::State PACKAGE = Coro::Cont	1135	int
		1136	cctx_count ()
		1137	CODE:
		1138	RETVAL = cctx_count;
		1139	OUTPUT:
		1140	RETVAL
1044		1141
1045	# this is slightly dirty (should expose a c-level api)	1142	int
1046		1143	cctx_idle ()
1047	void	1144	CODE:
1048	yield(...)	1145	RETVAL = cctx_idle;
1049	PROTOTYPE: @	1146	OUTPUT:
1050	CODE:	1147	RETVAL
1051	static SV *returnstk;
1052	SV *sv;
1053	AV *defav = GvAV (PL_defgv);
1054	struct coro prev, next;
1055
1056	if (!returnstk)
1057	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1058
1059	/* set up @_ -- ugly */
1060	av_clear (defav);
1061	av_fill (defav, items - 1);
1062	while (items--)
1063	av_store (defav, items, SvREFCNT_inc (ST(items)));
1064
1065	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1066	sv = av_pop ((AV *)SvRV (returnstk));
1067	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
1068	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
1069	SvREFCNT_dec (sv);
1070
1071	transfer(aTHX_ prev, next, 0);
1072		1148
1073	MODULE = Coro::State PACKAGE = Coro	1149	MODULE = Coro::State PACKAGE = Coro
1074		1150
1075	# this is slightly dirty (should expose a c-level api)
1076
1077	BOOT:	1151	BOOT:
1078	{	1152	{
1079	int i;	1153	int i;
		1154
1080	HV *stash = gv_stashpv ("Coro", TRUE);	1155	coro_stash = gv_stashpv ("Coro", TRUE);
1081		1156
1082	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1157	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1083	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1158	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1084	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1159	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1085	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1160	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1086	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1161	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1087	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1162	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1088		1163
1089	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1164	coro_current = get_sv ("Coro::current", FALSE);
1090	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1165	SvREADONLY_on (coro_current);
1091		1166
1092	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1167	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1093	coro_ready[i] = newAV ();	1168	coro_ready[i] = newAV ();
1094		1169
1095	{	1170	{
1096	SV *sv = perl_get_sv("Coro::API", 1);	1171	SV *sv = perl_get_sv("Coro::API", 1);
1097		1172
1098	coroapi.schedule = api_schedule;	1173	coroapi.schedule = api_schedule;
1099	coroapi.cede = api_cede;	1174	coroapi.cede = api_cede;
1100	coroapi.ready = api_ready;	1175	coroapi.ready = api_ready;
		1176	coroapi.is_ready = api_is_ready;
1101	coroapi.nready = &coro_nready;	1177	coroapi.nready = &coro_nready;
1102	coroapi.current = coro_current;	1178	coroapi.current = coro_current;
1103		1179
1104	GCoroAPI = &coroapi;	1180	GCoroAPI = &coroapi;
1105	sv_setiv(sv, (IV)&coroapi);	1181	sv_setiv (sv, (IV)&coroapi);
1106	SvREADONLY_on(sv);	1182	SvREADONLY_on (sv);
1107	}	1183	}
1108	}	1184	}
1109		1185
1110	#if !PERL_MICRO	1186	int
		1187	prio (Coro::State coro, int newprio = 0)
		1188	ALIAS:
		1189	nice = 1
		1190	CODE:
		1191	{
		1192	RETVAL = coro->prio;
1111		1193
1112	void	1194	if (items > 1)
		1195	{
		1196	if (ix)
		1197	newprio += coro->prio;
		1198
		1199	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1200	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1201
		1202	coro->prio = newprio;
		1203	}
		1204	}
		1205
		1206	SV *
1113	ready(self)	1207	ready (SV *self)
1114	SV * self
1115	PROTOTYPE: $	1208	PROTOTYPE: $
1116	CODE:	1209	CODE:
1117	api_ready (self);	1210	RETVAL = boolSV (api_ready (self));
		1211	OUTPUT:
		1212	RETVAL
1118		1213
1119	#endif	1214	SV *
		1215	is_ready (SV *self)
		1216	PROTOTYPE: $
		1217	CODE:
		1218	RETVAL = boolSV (api_is_ready (self));
		1219	OUTPUT:
		1220	RETVAL
1120		1221
1121	int	1222	int
1122	nready(...)	1223	nready (...)
1123	PROTOTYPE:	1224	PROTOTYPE:
1124	CODE:	1225	CODE:
1125	RETVAL = coro_nready;	1226	RETVAL = coro_nready;
1126	OUTPUT:	1227	OUTPUT:
1127	RETVAL	1228	RETVAL
1128		1229
1129	void	1230	void
1130	schedule(...)	1231	_set_current (SV *current)
1131	PROTOTYPE:	1232	PROTOTYPE: $
1132	CODE:	1233	CODE:
1133	api_schedule ();	1234	SvREFCNT_dec (SvRV (coro_current));
		1235	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1236
		1237	MODULE = Coro::State PACKAGE = Coro::AIO
		1238
		1239	SV *
		1240	_get_state ()
		1241	CODE:
		1242	{
		1243	struct io_state *data;
		1244
		1245	RETVAL = newSV (sizeof (struct io_state));
		1246	data = (struct io_state *)SvPVX (RETVAL);
		1247	SvCUR_set (RETVAL, sizeof (struct io_state));
		1248	SvPOK_only (RETVAL);
		1249
		1250	data->errorno = errno;
		1251	data->laststype = PL_laststype;
		1252	data->laststatval = PL_laststatval;
		1253	data->statcache = PL_statcache;
		1254	}
		1255	OUTPUT:
		1256	RETVAL
1134		1257
1135	void	1258	void
1136	cede(...)	1259	_set_state (char *data_)
1137	PROTOTYPE:	1260	PROTOTYPE: $
1138	CODE:	1261	CODE:
1139	api_cede ();	1262	{
		1263	struct io_state data = (void )data_;
1140		1264
		1265	errno = data->errorno;
		1266	PL_laststype = data->laststype;
		1267	PL_laststatval = data->laststatval;
		1268	PL_statcache = data->statcache;
		1269	}
		1270

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Comparing Coro/Coro/State.xs (file contents): Revision 1.58 by pcg, Fri May 14 13:25:09 2004 UTC vs. Revision 1.121 by root, Sat Dec 2 20:40:25 2006 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.58 by pcg, Fri May 14 13:25:09 2004 UTC vs.
Revision 1.121 by root, Sat Dec 2 20:40:25 2006 UTC