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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.90 by root, Sat Nov 25 00:56:35 2006 UTC vs.
Revision 1.127 by root, Tue Dec 12 13:56:45 2006 UTC

…		…
1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	#if PERL_VERSION < 6	9	#include <stdio.h>
		10	#include <errno.h>
		11	#include <assert.h>
		12
		13	#ifdef HAVE_MMAP
		14	# include <unistd.h>
		15	# include <sys/mman.h>
		16	# ifndef MAP_ANONYMOUS
		17	# ifdef MAP_ANON
		18	# define MAP_ANONYMOUS MAP_ANON
		19	# else
		20	# undef HAVE_MMAP
		21	# endif
		22	# endif
		23	# include <limits.h>
		24	# ifndef PAGESIZE
		25	# define PAGESIZE pagesize
		26	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		27	static long pagesize;
		28	# else
		29	# define BOOT_PAGESIZE (void)0
		30	# endif
		31	#else
		32	# define PAGESIZE 0
		33	# define BOOT_PAGESIZE (void)0
		34	#endif
		35
		36	#if USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	#endif
		39
		40	/* the maximum number of idle cctx that will be pooled */
		41	#define MAX_IDLE_CCTX 8
		42
		43	#define PERL_VERSION_ATLEAST(a,b,c) \
		44	(PERL_REVISION > (a) \
		45	\|\| (PERL_REVISION == (a) \
		46	&& (PERL_VERSION > (b) \
		47	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		48
		49	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	50	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	51	# define PL_ppaddr ppaddr
14	# endif	52	# endif
15	# ifndef call_sv	53	# ifndef call_sv
16	# define call_sv perl_call_sv	54	# define call_sv perl_call_sv
27	# ifndef IS_PADCONST	65	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	66	# define IS_PADCONST(v) 0
29	# endif	67	# endif
30	#endif	68	#endif
31		69
32	#include <errno.h>	70	/* 5.8.7 */
		71	#ifndef SvRV_set
		72	# define SvRV_set(s,v) SvRV(s) = (v)
		73	#endif
33		74
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	76	# undef STACKGUARD
36	#endif	77	#endif
37		78
38	#ifndef STACKGUARD	79	#ifndef STACKGUARD
39	# define STACKGUARD 0	80	# define STACKGUARD 0
40	#endif	81	#endif
41		82
42	#ifdef HAVE_MMAP	83	/* prefer perl internal functions over our own? */
43	# include <unistd.h>	84	#ifndef PREFER_PERL_FUNCTIONS
44	# include <sys/mman.h>	85	# define PREFER_PERL_FUNCTIONS 0
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	86	#endif
52	# include <limits.h>
53	# ifndef PAGESIZE
54	# define PAGESIZE pagesize
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif
60	#endif
61
62	#define SUB_INIT "Coro::State::initialize"
63		87
64	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* The next macro should declare a variable stacklevel that contains and approximation
65	* to the current C stack pointer. Its property is that it changes with each call	89	* to the current C stack pointer. Its property is that it changes with each call
66	* and should be unique. */	90	* and should be unique. */
		91	#define dSTACKLEVEL int stacklevel
67	#define dSTACKLEVEL void *stacklevel = &stacklevel	92	#define STACKLEVEL ((void *)&stacklevel)
68		93
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		95
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	96	#if __GNUC__ >= 3
		97	# define attribute(x) __attribute__(x)
		98	#else
		99	# define attribute(x)
		100	#endif
		101
		102	#define NOINLINE attribute ((noinline))
72		103
73	#include "CoroAPI.h"	104	#include "CoroAPI.h"
74		105
75	#ifdef USE_ITHREADS	106	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	107	static perl_mutex coro_mutex;
…		…
79	#else	110	#else
80	# define LOCK (void)0	111	# define LOCK (void)0
81	# define UNLOCK (void)0	112	# define UNLOCK (void)0
82	#endif	113	#endif
83		114
		115	struct io_state
		116	{
		117	int errorno;
		118	I32 laststype;
		119	int laststatval;
		120	Stat_t statcache;
		121	};
		122
84	static struct CoroAPI coroapi;	123	static struct CoroAPI coroapi;
85	static AV main_mainstack; / used to differentiate between $main and others */	124	static AV main_mainstack; / used to differentiate between $main and others */
86	static HV coro_state_stash, coro_stash;	125	static HV coro_state_stash, coro_stash;
87	static SV coro_mortal; / will be freed after next transfer */	126	static SV coro_mortal; / will be freed after next transfer */
88		127
89	/* this is actually not just the c stack but also c registers etc... */	128	static struct coro_cctx *cctx_first;
		129	static int cctx_count, cctx_idle;
		130
		131	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	132	typedef struct coro_cctx {
91	struct coro_stack *next;	133	struct coro_cctx *next;
92		134
93	void *idle_sp;	135	/* the stack */
94	void *sptr;	136	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	137	long ssize; /* positive == mmap, otherwise malloc */
96		138
97	/* cpu state */	139	/* cpu state */
		140	void idle_sp; / sp of top-level transfer/schedule/cede call */
		141	JMPENV *top_env;
98	coro_context cctx;	142	coro_context cctx;
99	} coro_stack;
100		143
101	static coro_stack *main_stack;	144	int inuse;
102		145
		146	#if USE_VALGRIND
		147	int valgrind_id;
		148	#endif
		149	} coro_cctx;
		150
		151	enum {
		152	CF_RUNNING = 0x0001, /* coroutine is running */
		153	CF_READY = 0x0002, /* coroutine is ready */
		154	CF_NEW = 0x0004, /* ahs never been switched to */
		155	};
		156
		157	/* this is a structure representing a perl-level coroutine */
103	struct coro {	158	struct coro {
104	/* optionally saved, might be zero */	159	/* the c coroutine allocated to this perl coroutine, if any */
105	AV *defav;	160	coro_cctx *cctx;
106	SV *defsv;
107	SV *errsv;
108
109	/* saved global state not related to stacks */
110	U8 dowarn;
111	I32 in_eval;
112
113	/* the c stack, if any */
114	coro_stack *stack;
115
116	/* the stacks and related info (callchain etc..) */
117	PERL_SI *curstackinfo;
118	AV *curstack;
119	AV *mainstack;
120	SV **stack_sp;
121	OP *op;
122	SV **curpad;
123	AV *comppad;
124	CV *compcv;
125	SV **stack_base;
126	SV **stack_max;
127	SV **tmps_stack;
128	I32 tmps_floor;
129	I32 tmps_ix;
130	I32 tmps_max;
131	I32 *markstack;
132	I32 *markstack_ptr;
133	I32 *markstack_max;
134	I32 *scopestack;
135	I32 scopestack_ix;
136	I32 scopestack_max;
137	ANY *savestack;
138	I32 savestack_ix;
139	I32 savestack_max;
140	OP **retstack;
141	I32 retstack_ix;
142	I32 retstack_max;
143	PMOP *curpm;
144	COP *curcop;
145	JMPENV *top_env;
146
147	/* coro process data */
148	int prio;
149		161
150	/* data associated with this coroutine (initial args) */	162	/* data associated with this coroutine (initial args) */
151	AV *args;	163	AV *args;
152	int refcnt;	164	int refcnt;
		165	int save; /* CORO_SAVE flags */
		166	int flags; /* CF_ flags */
		167
		168	/* optionally saved, might be zero */
		169	AV defav; / @_ */
		170	SV defsv; / $_ */
		171	SV errsv; / $@ */
		172	SV irssv; / $/ */
		173	SV irssv_sv; / real $/ cache */
		174
		175	#define VAR(name,type) type name;
		176	# include "state.h"
		177	#undef VAR
		178
		179	/* coro process data */
		180	int prio;
153	};	181	};
154		182
155	typedef struct coro *Coro__State;	183	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	184	typedef struct coro *Coro__State_or_hashref;
157		185
158	static AV *	186	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	187	coro_clone_padlist (CV *cv)
160	{	188	{
161	AV *padlist = CvPADLIST (cv);	189	AV *padlist = CvPADLIST (cv);
162	AV newpadlist, newpad;	190	AV newpadlist, newpad;
163		191
164	newpadlist = newAV ();	192	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	193	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	194	#if PERL_VERSION_ATLEAST (5,9,0)
		195	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		196	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	197	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	198	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	199	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	200	--AvFILLp (padlist);
173		201
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	202	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
176		204
177	return newpadlist;	205	return newpadlist;
178	}	206	}
179		207
180	static void	208	static void
181	free_padlist (pTHX_ AV *padlist)	209	free_padlist (AV *padlist)
182	{	210	{
183	/* may be during global destruction */	211	/* may be during global destruction */
184	if (SvREFCNT (padlist))	212	if (SvREFCNT (padlist))
185	{	213	{
186	I32 i = AvFILLp (padlist);	214	I32 i = AvFILLp (padlist);
…		…
207	AV *padlist;	235	AV *padlist;
208	AV av = (AV )mg->mg_obj;	236	AV av = (AV )mg->mg_obj;
209		237
210	/* casting is fun. */	238	/* casting is fun. */
211	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	239	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
212	free_padlist (aTHX_ padlist);	240	free_padlist (padlist);
213		241
214	SvREFCNT_dec (av);	242	SvREFCNT_dec (av);
215		243
216	return 0;	244	return 0;
217	}	245	}
218		246
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	247	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		248
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	249	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		250
		251	#define CORO_MAGIC(cv) \
		252	SvMAGIC (cv) \
		253	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		254	? SvMAGIC (cv) \
		255	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		256	: 0
		257
223	/* the next two functions merely cache the padlists */	258	/* the next two functions merely cache the padlists */
224	static void	259	static void
225	get_padlist (pTHX_ CV *cv)	260	get_padlist (CV *cv)
226	{	261	{
227	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	262	MAGIC *mg = CORO_MAGIC (cv);
		263	AV *av;
228		264
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	265	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
230	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	266	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	267	else
232	{	268	{
233	#if 0	269	#if PREFER_PERL_FUNCTIONS
234	/* this should work - but it doesn't :( */	270	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	271	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	272	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	273	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	274	SvREFCNT_dec (cp);
239	#else	275	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	276	CvPADLIST (cv) = coro_clone_padlist (cv);
241	#endif	277	#endif
242	}	278	}
243	}	279	}
244		280
245	static void	281	static void
246	put_padlist (pTHX_ CV *cv)	282	put_padlist (CV *cv)
247	{	283	{
248	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	284	MAGIC *mg = CORO_MAGIC (cv);
		285	AV *av;
249		286
250	if (!mg)	287	if (!mg)
251	{	288	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	289	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	290	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	291	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	292	mg->mg_obj = (SV *)newAV ();
256	}	293	}
257		294
258	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	295	av = (AV *)mg->mg_obj;
		296
		297	if (AvFILLp (av) >= AvMAX (av))
		298	av_extend (av, AvMAX (av) + 1);
		299
		300	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
259	}	301	}
260		302
261	#define SB do {	303	#define SB do {
262	#define SE } while (0)	304	#define SE } while (0)
263		305
264	#define LOAD(state) load_state(aTHX_ (state));
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
266
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	306	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
268		307
269	static void	308	static void
270	load_state(pTHX_ Coro__State c)	309	load_perl (Coro__State c)
271	{	310	{
272	PL_dowarn = c->dowarn;	311	#define VAR(name,type) PL_ ## name = c->name;
273	PL_in_eval = c->in_eval;	312	# include "state.h"
274		313	#undef VAR
275	PL_curstackinfo = c->curstackinfo;
276	PL_curstack = c->curstack;
277	PL_mainstack = c->mainstack;
278	PL_stack_sp = c->stack_sp;
279	PL_op = c->op;
280	PL_curpad = c->curpad;
281	PL_comppad = c->comppad;
282	PL_compcv = c->compcv;
283	PL_stack_base = c->stack_base;
284	PL_stack_max = c->stack_max;
285	PL_tmps_stack = c->tmps_stack;
286	PL_tmps_floor = c->tmps_floor;
287	PL_tmps_ix = c->tmps_ix;
288	PL_tmps_max = c->tmps_max;
289	PL_markstack = c->markstack;
290	PL_markstack_ptr = c->markstack_ptr;
291	PL_markstack_max = c->markstack_max;
292	PL_scopestack = c->scopestack;
293	PL_scopestack_ix = c->scopestack_ix;
294	PL_scopestack_max = c->scopestack_max;
295	PL_savestack = c->savestack;
296	PL_savestack_ix = c->savestack_ix;
297	PL_savestack_max = c->savestack_max;
298	#if PERL_VERSION < 9
299	PL_retstack = c->retstack;
300	PL_retstack_ix = c->retstack_ix;
301	PL_retstack_max = c->retstack_max;
302	#endif
303	PL_curpm = c->curpm;
304	PL_curcop = c->curcop;
305	PL_top_env = c->top_env;
306		314
307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	315	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	316	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
309	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	317	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		318	if (c->irssv)
		319	{
		320	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
		321	SvREFCNT_dec (c->irssv);
		322	else
		323	{
		324	REPLACE_SV (PL_rs, c->irssv);
		325	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		326	sv_setsv (c->irssv_sv, PL_rs);
		327	}
		328	}
310		329
311	{	330	{
312	dSP;	331	dSP;
313	CV *cv;	332	CV *cv;
314		333
315	/* now do the ugly restore mess */	334	/* now do the ugly restore mess */
316	while ((cv = (CV *)POPs))	335	while ((cv = (CV *)POPs))
317	{	336	{
318	AV padlist = (AV )POPs;
319
320	if (padlist)
321	{
322	put_padlist (aTHX_ cv); /* mark this padlist as available */	337	put_padlist (cv); /* mark this padlist as available */
323	CvPADLIST(cv) = padlist;	338	CvDEPTH (cv) = PTR2IV (POPs);
324	}	339	CvPADLIST (cv) = (AV *)POPs;
325
326	++CvDEPTH(cv);
327	}	340	}
328		341
329	PUTBACK;	342	PUTBACK;
330	}	343	}
331	}	344	}
332		345
333	static void	346	static void
334	save_state(pTHX_ Coro__State c, int flags)	347	save_perl (Coro__State c)
335	{	348	{
336	{	349	{
337	dSP;	350	dSP;
338	I32 cxix = cxstack_ix;	351	I32 cxix = cxstack_ix;
339	PERL_CONTEXT *ccstk = cxstack;	352	PERL_CONTEXT *ccstk = cxstack;
…		…
342	/*	355	/*
343	* the worst thing you can imagine happens first - we have to save	356	* the worst thing you can imagine happens first - we have to save
344	* (and reinitialize) all cv's in the whole callchain :(	357	* (and reinitialize) all cv's in the whole callchain :(
345	*/	358	*/
346		359
		360	EXTEND (SP, 3 + 1);
347	PUSHs (Nullsv);	361	PUSHs (Nullsv);
348	/* this loop was inspired by pp_caller */	362	/* this loop was inspired by pp_caller */
349	for (;;)	363	for (;;)
350	{	364	{
351	while (cxix >= 0)	365	while (cxix >= 0)
352	{	366	{
353	PERL_CONTEXT *cx = &ccstk[cxix--];	367	PERL_CONTEXT *cx = &ccstk[cxix--];
354		368
355	if (CxTYPE(cx) == CXt_SUB)	369	if (CxTYPE (cx) == CXt_SUB)
356	{	370	{
357	CV *cv = cx->blk_sub.cv;	371	CV *cv = cx->blk_sub.cv;
		372
358	if (CvDEPTH(cv))	373	if (CvDEPTH (cv))
359	{	374	{
360	EXTEND (SP, CvDEPTH(cv)*2);	375	EXTEND (SP, 3);
361
362	while (--CvDEPTH(cv))
363	{
364	/* this tells the restore code to increment CvDEPTH */
365	PUSHs (Nullsv);
366	PUSHs ((SV *)cv);
367	}
368
369	PUSHs ((SV *)CvPADLIST(cv));	376	PUSHs ((SV *)CvPADLIST (cv));
		377	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
370	PUSHs ((SV *)cv);	378	PUSHs ((SV *)cv);
371		379
		380	CvDEPTH (cv) = 0;
372	get_padlist (aTHX_ cv);	381	get_padlist (cv);
373	}	382	}
374	}	383	}
375	#ifdef CXt_FORMAT
376	else if (CxTYPE(cx) == CXt_FORMAT)
377	{
378	/* I never used formats, so how should I know how these are implemented? */
379	/* my bold guess is as a simple, plain sub... */
380	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381	}
382	#endif
383	}	384	}
384		385
385	if (top_si->si_type == PERLSI_MAIN)	386	if (top_si->si_type == PERLSI_MAIN)
386	break;	387	break;
387		388
…		…
391	}	392	}
392		393
393	PUTBACK;	394	PUTBACK;
394	}	395	}
395		396
396	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	397	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	398	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
398	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	399	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		400	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
399		401
400	c->dowarn = PL_dowarn;	402	#define VAR(name,type)c->name = PL_ ## name;
401	c->in_eval = PL_in_eval;	403	# include "state.h"
402		404	#undef VAR
403	c->curstackinfo = PL_curstackinfo;
404	c->curstack = PL_curstack;
405	c->mainstack = PL_mainstack;
406	c->stack_sp = PL_stack_sp;
407	c->op = PL_op;
408	c->curpad = PL_curpad;
409	c->comppad = PL_comppad;
410	c->compcv = PL_compcv;
411	c->stack_base = PL_stack_base;
412	c->stack_max = PL_stack_max;
413	c->tmps_stack = PL_tmps_stack;
414	c->tmps_floor = PL_tmps_floor;
415	c->tmps_ix = PL_tmps_ix;
416	c->tmps_max = PL_tmps_max;
417	c->markstack = PL_markstack;
418	c->markstack_ptr = PL_markstack_ptr;
419	c->markstack_max = PL_markstack_max;
420	c->scopestack = PL_scopestack;
421	c->scopestack_ix = PL_scopestack_ix;
422	c->scopestack_max = PL_scopestack_max;
423	c->savestack = PL_savestack;
424	c->savestack_ix = PL_savestack_ix;
425	c->savestack_max = PL_savestack_max;
426	#if PERL_VERSION < 9
427	c->retstack = PL_retstack;
428	c->retstack_ix = PL_retstack_ix;
429	c->retstack_max = PL_retstack_max;
430	#endif
431	c->curpm = PL_curpm;
432	c->curcop = PL_curcop;
433	c->top_env = PL_top_env;
434	}	405	}
435		406
436	/*	407	/*
437	* allocate various perl stacks. This is an exact copy	408	* allocate various perl stacks. This is an exact copy
438	* of perl.c:init_stacks, except that it uses less memory	409	* of perl.c:init_stacks, except that it uses less memory
439	* on the (sometimes correct) assumption that coroutines do	410	* on the (sometimes correct) assumption that coroutines do
440	* not usually need a lot of stackspace.	411	* not usually need a lot of stackspace.
441	*/	412	*/
		413	#if PREFER_PERL_FUNCTIONS
		414	# define coro_init_stacks init_stacks
		415	#else
442	static void	416	static void
443	coro_init_stacks (pTHX)	417	coro_init_stacks ()
444	{	418	{
445	LOCK;
446
447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	419	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
448	PL_curstackinfo->si_type = PERLSI_MAIN;	420	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	421	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	422	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		423
452	PL_stack_base = AvARRAY(PL_curstack);	424	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	425	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	426	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		427
456	New(50,PL_tmps_stack,96,SV*);	428	New(50,PL_tmps_stack,128,SV*);
457	PL_tmps_floor = -1;	429	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	430	PL_tmps_ix = -1;
459	PL_tmps_max = 96;	431	PL_tmps_max = 128;
460		432
461	New(54,PL_markstack,16,I32);	433	New(54,PL_markstack,32,I32);
462	PL_markstack_ptr = PL_markstack;	434	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 16;	435	PL_markstack_max = PL_markstack + 32;
464		436
465	#ifdef SET_MARK_OFFSET	437	#ifdef SET_MARK_OFFSET
466	SET_MARK_OFFSET;	438	SET_MARK_OFFSET;
467	#endif	439	#endif
468		440
469	New(54,PL_scopestack,16,I32);	441	New(54,PL_scopestack,32,I32);
470	PL_scopestack_ix = 0;	442	PL_scopestack_ix = 0;
471	PL_scopestack_max = 16;	443	PL_scopestack_max = 32;
472		444
473	New(54,PL_savestack,96,ANY);	445	New(54,PL_savestack,64,ANY);
474	PL_savestack_ix = 0;	446	PL_savestack_ix = 0;
475	PL_savestack_max = 96;	447	PL_savestack_max = 64;
476		448
477	#if PERL_VERSION < 9	449	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,8,OP*);	450	New(54,PL_retstack,16,OP*);
479	PL_retstack_ix = 0;	451	PL_retstack_ix = 0;
480	PL_retstack_max = 8;	452	PL_retstack_max = 16;
481	#endif	453	#endif
482
483	UNLOCK;
484	}	454	}
		455	#endif
485		456
486	/*	457	/*
487	* destroy the stacks, the callchain etc...	458	* destroy the stacks, the callchain etc...
488	*/	459	*/
489	static void	460	static void
490	destroy_stacks(pTHX)	461	coro_destroy_stacks ()
491	{	462	{
492	if (!IN_DESTRUCT)	463	if (!IN_DESTRUCT)
493	{	464	{
494	/* is this ugly, I ask? */	465	/* restore all saved variables and stuff */
495	LEAVE_SCOPE (0);	466	LEAVE_SCOPE (0);
		467	assert (PL_tmps_floor == -1);
496		468
497	/* sure it is, but more important: is it correct?? :/ */	469	/* free all temporaries */
498	FREETMPS;	470	FREETMPS;
		471	assert (PL_tmps_ix == -1);
499		472
500	/POPSTACK_TO (PL_mainstack);//D//use/	473	POPSTACK_TO (PL_mainstack);
501	}	474	}
502		475
503	while (PL_curstackinfo->si_next)	476	while (PL_curstackinfo->si_next)
504	PL_curstackinfo = PL_curstackinfo->si_next;	477	PL_curstackinfo = PL_curstackinfo->si_next;
505		478
506	while (PL_curstackinfo)	479	while (PL_curstackinfo)
507	{	480	{
508	PERL_SI *p = PL_curstackinfo->si_prev;	481	PERL_SI *p = PL_curstackinfo->si_prev;
509		482
510	{ /D//remove/
511	dSP;
512	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513	PUTBACK; /* possibly superfluous */
514	}
515
516	if (!IN_DESTRUCT)	483	if (!IN_DESTRUCT)
517	{
518	dounwind (-1);/D//remove/
519	SvREFCNT_dec (PL_curstackinfo->si_stack);	484	SvREFCNT_dec (PL_curstackinfo->si_stack);
520	}
521		485
522	Safefree (PL_curstackinfo->si_cxstack);	486	Safefree (PL_curstackinfo->si_cxstack);
523	Safefree (PL_curstackinfo);	487	Safefree (PL_curstackinfo);
524	PL_curstackinfo = p;	488	PL_curstackinfo = p;
525	}	489	}
526		490
527	Safefree (PL_tmps_stack);	491	Safefree (PL_tmps_stack);
528	Safefree (PL_markstack);	492	Safefree (PL_markstack);
529	Safefree (PL_scopestack);	493	Safefree (PL_scopestack);
530	Safefree (PL_savestack);	494	Safefree (PL_savestack);
531	#if PERL_VERSION < 9	495	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree (PL_retstack);	496	Safefree (PL_retstack);
533	#endif	497	#endif
534	}	498	}
535		499
536	static void	500	static void
537	setup_coro (struct coro *coro)	501	setup_coro (struct coro *coro)
538	{	502	{
539	/*	503	/*
540	* emulate part of the perl startup here.	504	* emulate part of the perl startup here.
541	*/	505	*/
542	dTHX;
543	dSP;
544	UNOP myop;
545	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
546		506
547	coro_init_stacks (aTHX);	507	coro_init_stacks ();
548	/PL_curcop = 0;/	508
549	/PL_in_eval = PL_in_eval;/ /* inherit */	509	PL_curcop = &PL_compiling;
		510	PL_in_eval = EVAL_NULL;
		511	PL_curpm = 0;
		512	PL_localizing = 0;
		513	PL_dirty = 0;
		514	PL_restartop = 0;
		515
		516	{
		517	dSP;
		518	LOGOP myop;
		519
550	SvREFCNT_dec (GvAV (PL_defgv));	520	SvREFCNT_dec (GvAV (PL_defgv));
551	GvAV (PL_defgv) = coro->args; coro->args = 0;	521	GvAV (PL_defgv) = coro->args; coro->args = 0;
552		522
553	SPAGAIN;
554
555	Zero (&myop, 1, UNOP);	523	Zero (&myop, 1, LOGOP);
556	myop.op_next = Nullop;	524	myop.op_next = Nullop;
557	myop.op_flags = OPf_WANT_VOID;	525	myop.op_flags = OPf_WANT_VOID;
558		526
		527	PUSHMARK (SP);
		528	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		529	PUTBACK;
559	PL_op = (OP *)&myop;	530	PL_op = (OP *)&myop;
560
561	PUSHMARK(SP);
562	XPUSHs (sub_init);
563	PUTBACK;
564	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	531	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565	SPAGAIN;	532	SPAGAIN;
		533	}
566		534
567	ENTER; /* necessary e.g. for dounwind */	535	ENTER; /* necessary e.g. for dounwind */
568	}	536	}
569		537
570	static void	538	static void
571	transfer_tail ()	539	free_coro_mortal ()
572	{	540	{
573	if (coro_mortal)	541	if (coro_mortal)
574	{	542	{
575	SvREFCNT_dec (coro_mortal);	543	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;	544	coro_mortal = 0;
577	}	545	}
		546	}
578		547
		548	/* inject a fake call to Coro::State::_cctx_init into the execution */
		549	static void NOINLINE
		550	prepare_cctx (coro_cctx *cctx)
		551	{
		552	dSP;
		553	LOGOP myop;
		554
		555	Zero (&myop, 1, LOGOP);
		556	myop.op_next = PL_op;
		557	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		558
		559	PUSHMARK (SP);
		560	EXTEND (SP, 2);
		561	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		562	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		563	PUTBACK;
		564	PL_op = (OP *)&myop;
		565	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		566	SPAGAIN;
		567	}
		568
		569	static void
		570	coro_run (void *arg)
		571	{
		572	/* coro_run is the alternative tail of transfer(), so unlock here. */
579	UNLOCK;	573	UNLOCK;
580	}
581		574
582	static void
583	coro_run (void *arg)
584	{
585	/*	575	/*
586	* this is a _very_ stripped down perl interpreter ;)	576	* this is a _very_ stripped down perl interpreter ;)
587	*/	577	*/
588	dTHX;
589
590	transfer_tail ();
591
592	PL_top_env = &PL_start_env;	578	PL_top_env = &PL_start_env;
593	PL_restartop = PL_op->op_next;	579
		580	/* inject call to cctx_init */
		581	prepare_cctx ((coro_cctx *)arg);
		582
594	/* somebody will hit me for both perl_run and PL_restart_top */	583	/* somebody will hit me for both perl_run and PL_restartop */
595	perl_run (aTHX_ PERL_GET_CONTEXT);	584	PL_restartop = PL_op;
		585	perl_run (PL_curinterp);
596		586
		587	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
597	abort ();	588	abort ();
598	}	589	}
599		590
600	static coro_stack *	591	static coro_cctx *
601	stack_new ()	592	cctx_new ()
602	{	593	{
603	coro_stack *stack;	594	coro_cctx *cctx;
604		595
		596	++cctx_count;
		597
605	New (0, stack, 1, coro_stack);	598	Newz (0, cctx, 1, coro_cctx);
606		599
607	#if HAVE_MMAP	600	#if HAVE_MMAP
608		601
609	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	602	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		603	/* mmap supposedly does allocate-on-write for us */
610	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	604	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
611		605
612	if (stack->sptr == (void *)-1)	606	if (cctx->sptr == (void *)-1)
613	{	607	{
614	fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n");	608	perror ("FATAL: unable to mmap stack for coroutine");
615	_exit (EXIT_FAILURE);	609	_exit (EXIT_FAILURE);
616	}	610	}
617		611
		612	# if STACKGUARD
618	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	613	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		614	# endif
619		615
620	#else	616	#else
621		617
622	stack->ssize = STACKSIZE * (long)sizeof (long);	618	cctx->ssize = STACKSIZE * (long)sizeof (long);
623	New (0, stack->sptr, STACKSIZE, long);	619	New (0, cctx->sptr, STACKSIZE, long);
624		620
625	if (!stack->sptr)	621	if (!cctx->sptr)
626	{	622	{
627	fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");	623	perror ("FATAL: unable to malloc stack for coroutine");
628	_exit (EXIT_FAILURE);	624	_exit (EXIT_FAILURE);
629	}	625	}
630		626
631	#endif	627	#endif
632		628
		629	#if USE_VALGRIND
		630	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		631	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		632	cctx->ssize + (char *)cctx->sptr
		633	);
		634	#endif
		635
633	coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize);	636	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
634		637
635	return stack;	638	return cctx;
636	}	639	}
637		640
638	static void	641	static void
639	stack_free (coro_stack *stack)	642	cctx_destroy (coro_cctx *cctx)
640	{	643	{
641	if (!stack \|\| stack == main_stack)	644	if (!cctx)
642	return;	645	return;
643		646
		647	--cctx_count;
		648
		649	#if USE_VALGRIND
		650	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		651	#endif
		652
644	#if HAVE_MMAP	653	#if HAVE_MMAP
645	munmap (stack->sptr, stack->ssize);	654	munmap (cctx->sptr, cctx->ssize);
646	#else	655	#else
647	Safefree (stack->sptr);	656	Safefree (cctx->sptr);
648	#endif	657	#endif
649		658
650	Safefree (stack);	659	Safefree (cctx);
651	}	660	}
652		661
653	static coro_stack *stack_first;	662	static coro_cctx *
654		663	cctx_get ()
655	static void
656	stack_get (struct coro *coro)
657	{	664	{
		665	coro_cctx *cctx;
		666
658	if (stack_first)	667	if (cctx_first)
659	{	668	{
660	coro->stack = stack_first;	669	cctx = cctx_first;
661	stack_first = stack_first->next;	670	cctx_first = cctx->next;
		671	--cctx_idle;
662	}	672	}
663	else	673	else
664	coro->stack = stack_new ();	674	{
665	}	675	cctx = cctx_new ();
		676	PL_op = PL_op->op_next;
		677	}
666		678
		679	return cctx;
		680	}
		681
667	static void	682	static void
668	stack_put (coro_stack *stack)	683	cctx_put (coro_cctx *cctx)
669	{	684	{
670	stack->next = stack_first;	685	/* free another cctx if overlimit */
671	stack_first = stack;	686	if (cctx_idle >= MAX_IDLE_CCTX)
		687	{
		688	coro_cctx *first = cctx_first;
		689	cctx_first = first->next;
		690	--cctx_idle;
		691
		692	assert (!first->inuse);
		693	cctx_destroy (first);
		694	}
		695
		696	++cctx_idle;
		697	cctx->next = cctx_first;
		698	cctx_first = cctx;
672	}	699	}
673		700
674	/* never call directly, always through the coro_state_transfer global variable */	701	/* never call directly, always through the coro_state_transfer global variable */
675	static void	702	static void NOINLINE
676	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)	703	transfer (struct coro prev, struct coro next)
677	{	704	{
678	dSTACKLEVEL;	705	dSTACKLEVEL;
679		706
680	/* sometimes transfer is only called to set idle_sp */	707	/* sometimes transfer is only called to set idle_sp */
681	if (!prev->stack->idle_sp)	708	if (!next)
682	prev->stack->idle_sp = stacklevel;	709	{
683		710	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
684	LOCK;	711	assert (((coro_cctx )prev)->top_env = PL_top_env); / just for the side effetc when assert is enabled */
685		712	}
686	if (prev != next)	713	else if (prev != next)
687	{	714	{
688	coro_stack *prev_stack = prev->stack;	715	coro_cctx *prev__cctx;
689		716
690	/* possibly "free" the stack */	717	if (prev->flags & CF_NEW)
691	if (prev_stack->idle_sp == stacklevel)
692	{	718	{
693	stack_put (prev_stack);	719	/* create a new empty context */
694	prev->stack = 0;	720	Newz (0, prev->cctx, 1, coro_cctx);
		721	prev->cctx->inuse = 1;
		722	prev->flags &= ~CF_NEW;
		723	prev->flags \|= CF_RUNNING;
695	}	724	}
696		725
697	if (next->mainstack)	726	/TODO: must not croak here /
		727	if (!prev->flags & CF_RUNNING)
		728	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		729
		730	if (next->flags & CF_RUNNING)
		731	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		732
		733	prev->flags &= ~CF_RUNNING;
		734	next->flags \|= CF_RUNNING;
		735
		736	LOCK;
		737
		738	if (next->flags & CF_NEW)
698	{	739	{
699	/* coroutine already started */	740	/* need to start coroutine */
700	SAVE (prev, flags);	741	next->flags &= ~CF_NEW;
701	LOAD (next);	742	/* first get rid of the old state */
		743	save_perl (prev);
		744	/* setup coroutine call */
		745	setup_coro (next);
		746	/* need a new stack */
		747	assert (!next->cctx);
702	}	748	}
703	else	749	else
704	{	750	{
705	/* need to start coroutine */	751	/* coroutine already started */
706	/* first get rid of the old state */	752	save_perl (prev);
707	SAVE (prev, -1);	753	load_perl (next);
708	/* setup coroutine call */
709	setup_coro (next);
710	/* need to change stack from main_stack to real one */
711	next->stack = 0;
712	}	754	}
713		755
		756	prev__cctx = prev->cctx;
		757
		758	/* possibly "free" the cctx */
		759	if (prev__cctx->idle_sp == STACKLEVEL)
		760	{
		761	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		762	assert (PL_top_env == prev__cctx->top_env);
		763
		764	prev->cctx = 0;
		765
		766	cctx_put (prev__cctx);
		767	prev__cctx->inuse = 0;
		768	}
		769
714	if (!next->stack)	770	if (!next->cctx)
715	stack_get (next);	771	{
		772	next->cctx = cctx_get ();
		773	assert (!next->cctx->inuse);
		774	next->cctx->inuse = 1;
		775	}
716		776
717	if (prev_stack != next->stack)	777	if (prev__cctx != next->cctx)
		778	{
		779	prev__cctx->top_env = PL_top_env;
		780	PL_top_env = next->cctx->top_env;
718	coro_transfer (&prev_stack->cctx, &next->stack->cctx);	781	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		782	}
		783
		784	free_coro_mortal ();
		785
		786	UNLOCK;
719	}	787	}
720
721	transfer_tail ();
722	}	788	}
723		789
724	/* use this function pointer to call the above function */	790	struct transfer_args
725	/* this is done to increase chances of the compiler not inlining the call */	791	{
726	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;	792	struct coro prev, next;
		793	};
		794
		795	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
727		796
728	static void	797	static void
729	coro_state_destroy (struct coro *coro)	798	coro_state_destroy (struct coro *coro)
730	{	799	{
731	if (coro->refcnt--)	800	if (coro->refcnt--)
732	return;	801	return;
733		802
734	if (coro->mainstack && coro->mainstack != main_mainstack)	803	if (coro->mainstack && coro->mainstack != main_mainstack)
735	{	804	{
736	struct coro temp;	805	struct coro temp;
		806	Zero (&temp, 1, struct coro);
		807	temp.save = CORO_SAVE_ALL;
737		808
738	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	809	if (coro->flags & CF_RUNNING)
739	LOAD (aTHX_ coro);	810	croak ("FATAL: tried to destroy currently running coroutine");
740		811
		812	save_perl (&temp);
		813	load_perl (coro);
		814
741	destroy_stacks (aTHX);	815	coro_destroy_stacks ();
742		816
743	LOAD ((&temp)); /* this will get rid of defsv etc.. */	817	load_perl (&temp); /* this will get rid of defsv etc.. */
744		818
745	coro->mainstack = 0;	819	coro->mainstack = 0;
746	}	820	}
747		821
748	stack_free (coro->stack);	822	cctx_destroy (coro->cctx);
749	SvREFCNT_dec (coro->args);	823	SvREFCNT_dec (coro->args);
750	Safefree (coro);	824	Safefree (coro);
751	}	825	}
752		826
753	static int	827	static int
754	coro_state_clear (SV sv, MAGIC mg)	828	coro_state_clear (pTHX_ SV sv, MAGIC mg)
755	{	829	{
756	struct coro coro = (struct coro )mg->mg_ptr;	830	struct coro coro = (struct coro )mg->mg_ptr;
757	mg->mg_ptr = 0;	831	mg->mg_ptr = 0;
758		832
759	coro_state_destroy (coro);	833	coro_state_destroy (coro);
760		834
761	return 0;	835	return 0;
762	}	836	}
763		837
764	static int	838	static int
765	coro_state_dup (MAGIC mg, CLONE_PARAMS params)	839	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
766	{	840	{
767	struct coro coro = (struct coro )mg->mg_ptr;	841	struct coro coro = (struct coro )mg->mg_ptr;
768		842
769	++coro->refcnt;	843	++coro->refcnt;
770		844
771	return 0;	845	return 0;
772	}	846	}
773		847
774	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	848	static MGVTBL coro_state_vtbl = {
		849	0, 0, 0, 0,
		850	coro_state_clear,
		851	0,
		852	#ifdef MGf_DUP
		853	coro_state_dup,
		854	#else
		855	# define MGf_DUP 0
		856	#endif
		857	};
775		858
776	static struct coro *	859	static struct coro *
777	SvSTATE (SV *coro)	860	SvSTATE (SV *coro)
778	{	861	{
779	HV *stash;	862	HV *stash;
…		…
794	assert (mg->mg_type == PERL_MAGIC_ext);	877	assert (mg->mg_type == PERL_MAGIC_ext);
795	return (struct coro *)mg->mg_ptr;	878	return (struct coro *)mg->mg_ptr;
796	}	879	}
797		880
798	static void	881	static void
		882	prepare_transfer (struct transfer_args ta, SV prev_sv, SV *next_sv)
		883	{
		884	ta->prev = SvSTATE (prev_sv);
		885	ta->next = SvSTATE (next_sv);
		886	}
		887
		888	static void
799	api_transfer (pTHX_ SV prev, SV next, int flags)	889	api_transfer (SV prev_sv, SV next_sv)
800	{	890	{
801	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	891	struct transfer_args ta;
		892
		893	prepare_transfer (&ta, prev_sv, next_sv);
		894	TRANSFER (ta);
		895	}
		896
		897	static int
		898	api_save (SV *coro_sv, int new_save)
		899	{
		900	struct coro *coro = SvSTATE (coro_sv);
		901	int old_save = coro->save;
		902
		903	if (new_save >= 0)
		904	coro->save = new_save;
		905
		906	return old_save;
802	}	907	}
803		908
804	/ Coro ******************************************************************/	909	/ Coro ******************************************************************/
805		910
806	#define PRIO_MAX 3	911	#define PRIO_MAX 3
…		…
809	#define PRIO_LOW -1	914	#define PRIO_LOW -1
810	#define PRIO_IDLE -3	915	#define PRIO_IDLE -3
811	#define PRIO_MIN -4	916	#define PRIO_MIN -4
812		917
813	/* for Coro.pm */	918	/* for Coro.pm */
814	static GV coro_current, coro_idle;	919	static SV *coro_current;
815	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	920	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
816	static int coro_nready;	921	static int coro_nready;
817		922
818	static void	923	static void
819	coro_enq (pTHX_ SV *sv)	924	coro_enq (SV *coro_sv)
820	{	925	{
821	int prio;
822
823	if (SvTYPE (sv) != SVt_PVHV)
824	croak ("Coro::ready tried to enqueue something that is not a coroutine");
825
826	prio = SvSTATE (sv)->prio;
827
828	av_push (coro_ready [prio - PRIO_MIN], sv);	926	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
829	coro_nready++;	927	coro_nready++;
830	}	928	}
831		929
832	static SV *	930	static SV *
833	coro_deq (pTHX_ int min_prio)	931	coro_deq (int min_prio)
834	{	932	{
835	int prio = PRIO_MAX - PRIO_MIN;	933	int prio = PRIO_MAX - PRIO_MIN;
836		934
837	min_prio -= PRIO_MIN;	935	min_prio -= PRIO_MIN;
838	if (min_prio < 0)	936	if (min_prio < 0)
…		…
846	}	944	}
847		945
848	return 0;	946	return 0;
849	}	947	}
850		948
851	static void	949	static int
852	api_ready (SV *coro)	950	api_ready (SV *coro_sv)
853	{	951	{
854	dTHX;	952	struct coro *coro;
855		953
856	if (SvROK (coro))	954	if (SvROK (coro_sv))
857	coro = SvRV (coro);	955	coro_sv = SvRV (coro_sv);
		956
		957	coro = SvSTATE (coro_sv);
		958
		959	if (coro->flags & CF_READY)
		960	return 0;
		961
		962	#if 0 /* this is actually harmless */
		963	if (coro->flags & CF_RUNNING)
		964	croak ("Coro::ready called on currently running coroutine");
		965	#endif
		966
		967	coro->flags \|= CF_READY;
858		968
859	LOCK;	969	LOCK;
860	coro_enq (aTHX_ SvREFCNT_inc (coro));	970	coro_enq (SvREFCNT_inc (coro_sv));
861	UNLOCK;	971	UNLOCK;
862	}
863		972
		973	return 1;
		974	}
		975
864	static void	976	static int
865	api_schedule (void)	977	api_is_ready (SV *coro_sv)
866	{	978	{
867	dTHX;	979	return !!SvSTATE (coro_sv)->flags & CF_READY;
		980	}
868		981
		982	static void
		983	prepare_schedule (struct transfer_args *ta)
		984	{
869	SV prev, next;	985	SV prev, next;
870	SV *current = GvSV (coro_current);
871		986
872	for (;;)	987	for (;;)
873	{	988	{
874	LOCK;	989	LOCK;
875
876	next = coro_deq (aTHX_ PRIO_MIN);	990	next = coro_deq (PRIO_MIN);
		991	UNLOCK;
877		992
878	if (next)	993	if (next)
879	break;	994	break;
880		995
881	UNLOCK;
882
883	{	996	{
884	dSP;	997	dSP;
885		998
886	ENTER;	999	ENTER;
887	SAVETMPS;	1000	SAVETMPS;
888		1001
889	PUSHMARK (SP);	1002	PUSHMARK (SP);
890	PUTBACK;	1003	PUTBACK;
891	call_sv (GvSV (coro_idle), G_DISCARD);	1004	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
892		1005
893	FREETMPS;	1006	FREETMPS;
894	LEAVE;	1007	LEAVE;
895	}	1008	}
896	}	1009	}
897		1010
898	prev = SvRV (current);	1011	prev = SvRV (coro_current);
899	SvRV (current) = next;	1012	SvRV_set (coro_current, next);
900		1013
901	/* free this only after the transfer */	1014	/* free this only after the transfer */
		1015	LOCK;
		1016	free_coro_mortal ();
		1017	UNLOCK;
902	coro_mortal = prev;	1018	coro_mortal = prev;
903		1019
904	UNLOCK;	1020	assert (!SvROK(prev));//D
		1021	assert (!SvROK(next));//D
905		1022
906	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);	1023	ta->prev = SvSTATE (prev);
907	}	1024	ta->next = SvSTATE (next);
908		1025
909	static int coro_cede_self;	1026	assert (ta->next->flags & CF_READY);
		1027	ta->next->flags &= ~CF_READY;
		1028	}
		1029
		1030	static void
		1031	prepare_cede (struct transfer_args *ta)
		1032	{
		1033	api_ready (coro_current);
		1034
		1035	prepare_schedule (ta);
		1036	}
		1037
		1038	static void
		1039	api_schedule (void)
		1040	{
		1041	struct transfer_args ta;
		1042
		1043	prepare_schedule (&ta);
		1044	TRANSFER (ta);
		1045	}
910		1046
911	static void	1047	static void
912	api_cede (void)	1048	api_cede (void)
913	{	1049	{
914	dTHX;	1050	struct transfer_args ta;
915	SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));
916		1051
917	LOCK;	1052	prepare_cede (&ta);
918		1053	TRANSFER (ta);
919	if (coro_cede_self)
920	{
921	AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN];
922	av_unshift (runqueue, 1);
923	av_store (runqueue, 0, current);
924	coro_nready++;
925	coro_cede_self = 0;
926	}
927	else
928	coro_enq (aTHX_ current);
929
930	UNLOCK;
931
932	api_schedule ();
933	}	1054	}
934		1055
935	MODULE = Coro::State PACKAGE = Coro::State	1056	MODULE = Coro::State PACKAGE = Coro::State
936		1057
937	PROTOTYPES: DISABLE	1058	PROTOTYPES: DISABLE
…		…
943	#endif	1064	#endif
944	BOOT_PAGESIZE;	1065	BOOT_PAGESIZE;
945		1066
946	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1067	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
947		1068
948	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1069	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
949	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1070	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
950	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1071	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1072	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1073	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
951		1074
952	main_mainstack = PL_mainstack;	1075	main_mainstack = PL_mainstack;
953		1076
954	coroapi.ver = CORO_API_VERSION;	1077	coroapi.ver = CORO_API_VERSION;
955	coroapi.transfer = api_transfer;	1078	coroapi.transfer = api_transfer;
956
957	Newz (0, main_stack, 1, coro_stack);
958	main_stack->idle_sp = (void *)-1;
959		1079
960	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1080	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
961	}	1081	}
962		1082
963	SV *	1083	SV *
…		…
968	HV *hv;	1088	HV *hv;
969	int i;	1089	int i;
970		1090
971	Newz (0, coro, 1, struct coro);	1091	Newz (0, coro, 1, struct coro);
972	coro->args = newAV ();	1092	coro->args = newAV ();
		1093	coro->save = CORO_SAVE_ALL;
		1094	coro->flags = CF_NEW;
973		1095
974	hv = newHV ();	1096	hv = newHV ();
975	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1097	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
976	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1098	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
977		1099
978	av_push (coro->args, newSVsv (RETVAL));
979	for (i = 1; i < items; i++)	1100	for (i = 1; i < items; i++)
980	av_push (coro->args, newSVsv (ST (i)));	1101	av_push (coro->args, newSVsv (ST (i)));
981
982	coro->stack = main_stack;
983	/coro->mainstack = 0; //actual work is done inside transfer /
984	/coro->stack = 0;/
985	}	1102	}
986	OUTPUT:	1103	OUTPUT:
987	RETVAL	1104	RETVAL
988		1105
		1106	int
		1107	save (SV *coro, int new_save = -1)
		1108	CODE:
		1109	RETVAL = api_save (coro, new_save);
		1110	OUTPUT:
		1111	RETVAL
		1112
989	void	1113	void
990	transfer (prev, next, flags)	1114	_set_stacklevel (...)
991	SV *prev	1115	ALIAS:
992	SV *next	1116	Coro::State::transfer = 1
993	int flags	1117	Coro::schedule = 2
		1118	Coro::cede = 3
994	CODE:	1119	CODE:
995	PUTBACK;
996	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
997	SPAGAIN;
998
999	int
1000	prio (Coro::State coro, int newprio = 0)
1001	ALIAS:
1002	nice = 1
1003	CODE:
1004	{	1120	{
1005	RETVAL = coro->prio;	1121	struct transfer_args ta;
1006		1122
1007	if (items > 1)	1123	switch (ix)
1008	{	1124	{
		1125	case 0:
		1126	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1127	ta.next = 0;
		1128	break;
		1129
		1130	case 1:
1009	if (ix)	1131	if (items != 2)
1010	newprio += coro->prio;	1132	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1011		1133
1012	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1134	prepare_transfer (&ta, ST (0), ST (1));
1013	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1135	break;
1014		1136
1015	coro->prio = newprio;	1137	case 2:
		1138	prepare_schedule (&ta);
		1139	break;
		1140
		1141	case 3:
		1142	prepare_cede (&ta);
		1143	break;
1016	}	1144	}
1017	}
1018		1145
1019	void	1146	TRANSFER (ta);
1020	_clear_idle_sp (Coro::State self)	1147	}
1021	CODE:
1022	self->stack->idle_sp = 0;
1023		1148
1024	void	1149	void
1025	_clone_state_from (SV dst, SV src)	1150	_clone_state_from (SV dst, SV src)
1026	CODE:	1151	CODE:
1027	{	1152	{
…		…
1038	int code	1163	int code
1039	PROTOTYPE: $	1164	PROTOTYPE: $
1040	CODE:	1165	CODE:
1041	_exit (code);	1166	_exit (code);
1042		1167
1043	MODULE = Coro::State PACKAGE = Coro::Cont	1168	int
		1169	cctx_count ()
		1170	CODE:
		1171	RETVAL = cctx_count;
		1172	OUTPUT:
		1173	RETVAL
1044		1174
1045	void	1175	int
1046	yield (...)	1176	cctx_idle ()
1047	PROTOTYPE: @	1177	CODE:
1048	CODE:	1178	RETVAL = cctx_idle;
1049	{	1179	OUTPUT:
1050	SV *yieldstack;	1180	RETVAL
1051	SV *sv;
1052	AV *defav = GvAV (PL_defgv);
1053	struct coro prev, next;
1054
1055	yieldstack = *hv_fetch (
1056	(HV *)SvRV (GvSV (coro_current)),
1057	"yieldstack", sizeof ("yieldstack") - 1,
1058	0
1059	);
1060
1061	/* set up @_ -- ugly */
1062	av_clear (defav);
1063	av_fill (defav, items - 1);
1064	while (items--)
1065	av_store (defav, items, SvREFCNT_inc (ST(items)));
1066
1067	sv = av_pop ((AV *)SvRV (yieldstack));
1068	prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1069	next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1070	SvREFCNT_dec (sv);
1071
1072	coro_state_transfer (aTHX_ prev, next, 0);
1073	}
1074		1181
1075	MODULE = Coro::State PACKAGE = Coro	1182	MODULE = Coro::State PACKAGE = Coro
1076		1183
1077	BOOT:	1184	BOOT:
1078	{	1185	{
…		…
1085	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1192	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1086	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1193	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1087	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1194	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1088	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1195	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1089		1196
1090	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1197	coro_current = get_sv ("Coro::current", FALSE);
1091	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1198	SvREADONLY_on (coro_current);
1092		1199
1093	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1200	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1094	coro_ready[i] = newAV ();	1201	coro_ready[i] = newAV ();
1095		1202
1096	{	1203	{
1097	SV *sv = perl_get_sv("Coro::API", 1);	1204	SV *sv = perl_get_sv("Coro::API", 1);
1098		1205
1099	coroapi.schedule = api_schedule;	1206	coroapi.schedule = api_schedule;
		1207	coroapi.save = api_save;
1100	coroapi.cede = api_cede;	1208	coroapi.cede = api_cede;
1101	coroapi.ready = api_ready;	1209	coroapi.ready = api_ready;
		1210	coroapi.is_ready = api_is_ready;
1102	coroapi.nready = &coro_nready;	1211	coroapi.nready = &coro_nready;
1103	coroapi.current = coro_current;	1212	coroapi.current = coro_current;
1104		1213
1105	GCoroAPI = &coroapi;	1214	GCoroAPI = &coroapi;
1106	sv_setiv (sv, (IV)&coroapi);	1215	sv_setiv (sv, (IV)&coroapi);
1107	SvREADONLY_on (sv);	1216	SvREADONLY_on (sv);
1108	}	1217	}
1109	}	1218	}
1110		1219
1111	void	1220	void
		1221	_set_current (SV *current)
		1222	PROTOTYPE: $
		1223	CODE:
		1224	SvREFCNT_dec (SvRV (coro_current));
		1225	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1226
		1227	int
		1228	prio (Coro::State coro, int newprio = 0)
		1229	ALIAS:
		1230	nice = 1
		1231	CODE:
		1232	{
		1233	RETVAL = coro->prio;
		1234
		1235	if (items > 1)
		1236	{
		1237	if (ix)
		1238	newprio += coro->prio;
		1239
		1240	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1241	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1242
		1243	coro->prio = newprio;
		1244	}
		1245	}
		1246
		1247	SV *
1112	ready (SV *self)	1248	ready (SV *self)
1113	PROTOTYPE: $	1249	PROTOTYPE: $
1114	CODE:	1250	CODE:
1115	api_ready (self);	1251	RETVAL = boolSV (api_ready (self));
		1252	OUTPUT:
		1253	RETVAL
		1254
		1255	SV *
		1256	is_ready (SV *self)
		1257	PROTOTYPE: $
		1258	CODE:
		1259	RETVAL = boolSV (api_is_ready (self));
		1260	OUTPUT:
		1261	RETVAL
1116		1262
1117	int	1263	int
1118	nready (...)	1264	nready (...)
1119	PROTOTYPE:	1265	PROTOTYPE:
1120	CODE:	1266	CODE:
1121	RETVAL = coro_nready;	1267	RETVAL = coro_nready;
1122	OUTPUT:	1268	OUTPUT:
1123	RETVAL	1269	RETVAL
1124		1270
1125	void
1126	schedule (...)
1127	PROTOTYPE:
1128	CODE:
1129	api_schedule ();
1130
1131	void
1132	_set_cede_self ()
1133	CODE:
1134	coro_cede_self = 1;
1135
1136	void
1137	cede (...)
1138	PROTOTYPE:
1139	CODE:
1140	api_cede ();
1141
1142	MODULE = Coro::State PACKAGE = Coro::AIO	1271	MODULE = Coro::State PACKAGE = Coro::AIO
1143		1272
1144	SV *	1273	SV *
1145	_get_state ()	1274	_get_state ()
1146	CODE:	1275	CODE:
1147	{	1276	{
1148	struct {	1277	struct io_state *data;
1149	int errorno;
1150	int laststype;
1151	int laststatval;
1152	Stat_t statcache;
1153	} data;
1154		1278
		1279	RETVAL = newSV (sizeof (struct io_state));
		1280	data = (struct io_state *)SvPVX (RETVAL);
		1281	SvCUR_set (RETVAL, sizeof (struct io_state));
		1282	SvPOK_only (RETVAL);
		1283
1155	data.errorno = errno;	1284	data->errorno = errno;
1156	data.laststype = PL_laststype;	1285	data->laststype = PL_laststype;
1157	data.laststatval = PL_laststatval;	1286	data->laststatval = PL_laststatval;
1158	data.statcache = PL_statcache;	1287	data->statcache = PL_statcache;
1159
1160	RETVAL = newSVpvn ((char *)&data, sizeof data);
1161	}	1288	}
1162	OUTPUT:	1289	OUTPUT:
1163	RETVAL	1290	RETVAL
1164		1291
1165	void	1292	void
1166	_set_state (char *data_)	1293	_set_state (char *data_)
1167	PROTOTYPE: $	1294	PROTOTYPE: $
1168	CODE:	1295	CODE:
1169	{	1296	{
1170	struct {	1297	struct io_state data = (void )data_;
1171	int errorno;
1172	int laststype;
1173	int laststatval;
1174	Stat_t statcache;
1175	} data = (void )data_;
1176		1298
1177	errno = data->errorno;	1299	errno = data->errorno;
1178	PL_laststype = data->laststype;	1300	PL_laststype = data->laststype;
1179	PL_laststatval = data->laststatval;	1301	PL_laststatval = data->laststatval;
1180	PL_statcache = data->statcache;	1302	PL_statcache = data->statcache;
1181	}	1303	}
		1304

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Comparing Coro/Coro/State.xs (file contents): Revision 1.90 by root, Sat Nov 25 00:56:35 2006 UTC vs. Revision 1.127 by root, Tue Dec 12 13:56:45 2006 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.90 by root, Sat Nov 25 00:56:35 2006 UTC vs.
Revision 1.127 by root, Tue Dec 12 13:56:45 2006 UTC