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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.93 by root, Sun Nov 26 03:22:50 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 <stdio.h>	70	/* 5.8.7 */
33	#include <errno.h>	71	#ifndef SvRV_set
		72	# define SvRV_set(s,v) SvRV(s) = (v)
		73	#endif
34		74
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	76	# undef STACKGUARD
37	#endif	77	#endif
38		78
39	#ifndef STACKGUARD	79	#ifndef STACKGUARD
40	# define STACKGUARD 0	80	# define STACKGUARD 0
41	#endif	81	#endif
42		82
43	#ifdef HAVE_MMAP	83	/* prefer perl internal functions over our own? */
44	# include <unistd.h>	84	#ifndef PREFER_PERL_FUNCTIONS
45	# include <sys/mman.h>	85	# define PREFER_PERL_FUNCTIONS 0
46	# ifndef MAP_ANONYMOUS
47	# ifdef MAP_ANON
48	# define MAP_ANONYMOUS MAP_ANON
49	# else
50	# undef HAVE_MMAP
51	# endif
52	# endif
53	# include <limits.h>
54	# ifndef PAGESIZE
55	# define PAGESIZE pagesize
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif
61	#endif	86	#endif
62		87
63	/* 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
64	* 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
65	* and should be unique. */	90	* and should be unique. */
66	#define dSTACKLEVEL int stacklevel	91	#define dSTACKLEVEL int stacklevel
67	#define STACKLEVEL ((void *)&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
75	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
76		105
77	#ifdef USE_ITHREADS	106	#ifdef USE_ITHREADS
78	static perl_mutex coro_mutex;	107	static perl_mutex coro_mutex;
79	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	108	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
80	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	109	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
81	#else	110	#else
82	# define LOCK (void)0	111	# define LOCK (void)0
83	# define UNLOCK (void)0	112	# define UNLOCK (void)0
84	#endif	113	#endif
85		114
		115	struct io_state
		116	{
		117	int errorno;
		118	I32 laststype;
		119	int laststatval;
		120	Stat_t statcache;
		121	};
		122
86	static struct CoroAPI coroapi;	123	static struct CoroAPI coroapi;
87	static AV main_mainstack; / used to differentiate between $main and others */	124	static AV main_mainstack; / used to differentiate between $main and others */
88	static HV coro_state_stash, coro_stash;	125	static HV coro_state_stash, coro_stash;
89	static SV coro_mortal; / will be freed after next transfer */	126	static SV coro_mortal; / will be freed after next transfer */
90		127
		128	static struct coro_cctx *cctx_first;
		129	static int cctx_count, cctx_idle;
		130
91	/* this is a structure representing a c-level coroutine */	131	/* this is a structure representing a c-level coroutine */
92	typedef struct coro_stack {	132	typedef struct coro_cctx {
93	struct coro_stack *next;	133	struct coro_cctx *next;
94		134
95	/* the stack */	135	/* the stack */
96	void *sptr;	136	void *sptr;
97	long ssize; /* positive == mmap, otherwise malloc */	137	long ssize; /* positive == mmap, otherwise malloc */
98		138
99	/* cpu state */	139	/* cpu state */
100	void idle_sp; / original stacklevel when coroutine was created */	140	void idle_sp; / sp of top-level transfer/schedule/cede call */
101	JMPENV *top_env;	141	JMPENV *top_env;
102	coro_context cctx;	142	coro_context cctx;
103	} coro_stack;
104		143
105	/* the (fake) coro_stack representing the main program */	144	int inuse;
106	static coro_stack *main_stack;	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	};
107		156
108	/* this is a structure representing a perl-level coroutine */	157	/* this is a structure representing a perl-level coroutine */
109	struct coro {	158	struct coro {
110	/* the c coroutine allocated to this perl coroutine, if any */	159	/* the c coroutine allocated to this perl coroutine, if any */
111	coro_stack *stack;	160	coro_cctx *cctx;
112		161
113	/* data associated with this coroutine (initial args) */	162	/* data associated with this coroutine (initial args) */
114	AV *args;	163	AV *args;
115	int refcnt;	164	int refcnt;
		165	int save; /* CORO_SAVE flags */
		166	int flags; /* CF_ flags */
116		167
117	/* optionally saved, might be zero */	168	/* optionally saved, might be zero */
118	AV *defav;	169	AV defav; / @_ */
119	SV *defsv;	170	SV defsv; / $_ */
120	SV *errsv;	171	SV errsv; / $@ */
		172	SV irssv; / $/ */
		173	SV irssv_sv; / real $/ cache */
121		174
122	/* saved global state not related to stacks */	175	#define VAR(name,type) type name;
123	U8 dowarn;	176	# include "state.h"
124	I32 in_eval;	177	#undef VAR
125
126	/* the stacks and related info (callchain etc..) */
127	PERL_SI *curstackinfo;
128	AV *curstack;
129	AV *mainstack;
130	SV **stack_sp;
131	OP *op;
132	SV **curpad;
133	AV *comppad;
134	CV *compcv;
135	SV **stack_base;
136	SV **stack_max;
137	SV **tmps_stack;
138	I32 tmps_floor;
139	I32 tmps_ix;
140	I32 tmps_max;
141	I32 *markstack;
142	I32 *markstack_ptr;
143	I32 *markstack_max;
144	I32 *scopestack;
145	I32 scopestack_ix;
146	I32 scopestack_max;
147	ANY *savestack;
148	I32 savestack_ix;
149	I32 savestack_max;
150	OP **retstack;
151	I32 retstack_ix;
152	I32 retstack_max;
153	PMOP *curpm;
154	COP *curcop;
155		178
156	/* coro process data */	179	/* coro process data */
157	int prio;	180	int prio;
158	};	181	};
159		182
160	typedef struct coro *Coro__State;	183	typedef struct coro *Coro__State;
161	typedef struct coro *Coro__State_or_hashref;	184	typedef struct coro *Coro__State_or_hashref;
162		185
163	static AV *	186	static AV *
164	coro_clone_padlist (pTHX_ CV *cv)	187	coro_clone_padlist (CV *cv)
165	{	188	{
166	AV *padlist = CvPADLIST (cv);	189	AV *padlist = CvPADLIST (cv);
167	AV newpadlist, newpad;	190	AV newpadlist, newpad;
168		191
169	newpadlist = newAV ();	192	newpadlist = newAV ();
170	AvREAL_off (newpadlist);	193	AvREAL_off (newpadlist);
171	#if PERL_VERSION < 9	194	#if PERL_VERSION_ATLEAST (5,9,0)
		195	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		196	#else
172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	197	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
173	#else
174	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
175	#endif	198	#endif
176	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	199	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
177	--AvFILLp (padlist);	200	--AvFILLp (padlist);
178		201
179	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	202	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
181		204
182	return newpadlist;	205	return newpadlist;
183	}	206	}
184		207
185	static void	208	static void
186	free_padlist (pTHX_ AV *padlist)	209	free_padlist (AV *padlist)
187	{	210	{
188	/* may be during global destruction */	211	/* may be during global destruction */
189	if (SvREFCNT (padlist))	212	if (SvREFCNT (padlist))
190	{	213	{
191	I32 i = AvFILLp (padlist);	214	I32 i = AvFILLp (padlist);
…		…
212	AV *padlist;	235	AV *padlist;
213	AV av = (AV )mg->mg_obj;	236	AV av = (AV )mg->mg_obj;
214		237
215	/* casting is fun. */	238	/* casting is fun. */
216	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	239	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
217	free_padlist (aTHX_ padlist);	240	free_padlist (padlist);
218		241
219	SvREFCNT_dec (av);	242	SvREFCNT_dec (av);
220		243
221	return 0;	244	return 0;
222	}	245	}
223		246
224	#define PERL_MAGIC_coro PERL_MAGIC_ext	247	#define PERL_MAGIC_coro PERL_MAGIC_ext
225		248
226	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	249	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
227		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
228	/* the next two functions merely cache the padlists */	258	/* the next two functions merely cache the padlists */
229	static void	259	static void
230	get_padlist (pTHX_ CV *cv)	260	get_padlist (CV *cv)
231	{	261	{
232	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	262	MAGIC *mg = CORO_MAGIC (cv);
		263	AV *av;
233		264
234	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	265	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
235	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	266	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
236	else	267	else
237	{	268	{
238	#if 0	269	#if PREFER_PERL_FUNCTIONS
239	/* this should work - but it doesn't :( */	270	/* this is probably cleaner, but also slower? */
240	CV *cp = Perl_cv_clone (aTHX_ cv);	271	CV *cp = Perl_cv_clone (cv);
241	CvPADLIST (cv) = CvPADLIST (cp);	272	CvPADLIST (cv) = CvPADLIST (cp);
242	CvPADLIST (cp) = 0;	273	CvPADLIST (cp) = 0;
243	SvREFCNT_dec (cp);	274	SvREFCNT_dec (cp);
244	#else	275	#else
245	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	276	CvPADLIST (cv) = coro_clone_padlist (cv);
246	#endif	277	#endif
247	}	278	}
248	}	279	}
249		280
250	static void	281	static void
251	put_padlist (pTHX_ CV *cv)	282	put_padlist (CV *cv)
252	{	283	{
253	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	284	MAGIC *mg = CORO_MAGIC (cv);
		285	AV *av;
254		286
255	if (!mg)	287	if (!mg)
256	{	288	{
257	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	289	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
258	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	290	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
259	mg->mg_virtual = &vtbl_coro;	291	mg->mg_virtual = &vtbl_coro;
260	mg->mg_obj = (SV *)newAV ();	292	mg->mg_obj = (SV *)newAV ();
261	}	293	}
262		294
263	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);
264	}	301	}
265		302
266	#define SB do {	303	#define SB do {
267	#define SE } while (0)	304	#define SE } while (0)
268		305
269	#define LOAD(state) load_state(aTHX_ (state));
270	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
271
272	#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
273		307
274	static void	308	static void
275	load_state(pTHX_ Coro__State c)	309	load_perl (Coro__State c)
276	{	310	{
277	PL_dowarn = c->dowarn;	311	#define VAR(name,type) PL_ ## name = c->name;
278	PL_in_eval = c->in_eval;	312	# include "state.h"
279		313	#undef VAR
280	PL_curstackinfo = c->curstackinfo;
281	PL_curstack = c->curstack;
282	PL_mainstack = c->mainstack;
283	PL_stack_sp = c->stack_sp;
284	PL_op = c->op;
285	PL_curpad = c->curpad;
286	PL_comppad = c->comppad;
287	PL_compcv = c->compcv;
288	PL_stack_base = c->stack_base;
289	PL_stack_max = c->stack_max;
290	PL_tmps_stack = c->tmps_stack;
291	PL_tmps_floor = c->tmps_floor;
292	PL_tmps_ix = c->tmps_ix;
293	PL_tmps_max = c->tmps_max;
294	PL_markstack = c->markstack;
295	PL_markstack_ptr = c->markstack_ptr;
296	PL_markstack_max = c->markstack_max;
297	PL_scopestack = c->scopestack;
298	PL_scopestack_ix = c->scopestack_ix;
299	PL_scopestack_max = c->scopestack_max;
300	PL_savestack = c->savestack;
301	PL_savestack_ix = c->savestack_ix;
302	PL_savestack_max = c->savestack_max;
303	#if PERL_VERSION < 9
304	PL_retstack = c->retstack;
305	PL_retstack_ix = c->retstack_ix;
306	PL_retstack_max = c->retstack_max;
307	#endif
308	PL_curpm = c->curpm;
309	PL_curcop = c->curcop;
310		314
311	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	315	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
312	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	316	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
313	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	}
314		329
315	{	330	{
316	dSP;	331	dSP;
317	CV *cv;	332	CV *cv;
318		333
319	/* now do the ugly restore mess */	334	/* now do the ugly restore mess */
320	while ((cv = (CV *)POPs))	335	while ((cv = (CV *)POPs))
321	{	336	{
322	AV padlist = (AV )POPs;
323
324	if (padlist)
325	{
326	put_padlist (aTHX_ cv); /* mark this padlist as available */	337	put_padlist (cv); /* mark this padlist as available */
327	CvPADLIST(cv) = padlist;	338	CvDEPTH (cv) = PTR2IV (POPs);
328	}	339	CvPADLIST (cv) = (AV *)POPs;
329
330	++CvDEPTH(cv);
331	}	340	}
332		341
333	PUTBACK;	342	PUTBACK;
334	}	343	}
335	}	344	}
336		345
337	static void	346	static void
338	save_state(pTHX_ Coro__State c, int flags)	347	save_perl (Coro__State c)
339	{	348	{
340	{	349	{
341	dSP;	350	dSP;
342	I32 cxix = cxstack_ix;	351	I32 cxix = cxstack_ix;
343	PERL_CONTEXT *ccstk = cxstack;	352	PERL_CONTEXT *ccstk = cxstack;
…		…
346	/*	355	/*
347	* 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
348	* (and reinitialize) all cv's in the whole callchain :(	357	* (and reinitialize) all cv's in the whole callchain :(
349	*/	358	*/
350		359
		360	EXTEND (SP, 3 + 1);
351	PUSHs (Nullsv);	361	PUSHs (Nullsv);
352	/* this loop was inspired by pp_caller */	362	/* this loop was inspired by pp_caller */
353	for (;;)	363	for (;;)
354	{	364	{
355	while (cxix >= 0)	365	while (cxix >= 0)
356	{	366	{
357	PERL_CONTEXT *cx = &ccstk[cxix--];	367	PERL_CONTEXT *cx = &ccstk[cxix--];
358		368
359	if (CxTYPE(cx) == CXt_SUB)	369	if (CxTYPE (cx) == CXt_SUB)
360	{	370	{
361	CV *cv = cx->blk_sub.cv;	371	CV *cv = cx->blk_sub.cv;
		372
362	if (CvDEPTH(cv))	373	if (CvDEPTH (cv))
363	{	374	{
364	EXTEND (SP, CvDEPTH(cv)*2);	375	EXTEND (SP, 3);
365
366	while (--CvDEPTH(cv))
367	{
368	/* this tells the restore code to increment CvDEPTH */
369	PUSHs (Nullsv);
370	PUSHs ((SV *)cv);
371	}
372
373	PUSHs ((SV *)CvPADLIST(cv));	376	PUSHs ((SV *)CvPADLIST (cv));
		377	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
374	PUSHs ((SV *)cv);	378	PUSHs ((SV *)cv);
375		379
		380	CvDEPTH (cv) = 0;
376	get_padlist (aTHX_ cv);	381	get_padlist (cv);
377	}	382	}
378	}	383	}
379	#ifdef CXt_FORMAT
380	else if (CxTYPE(cx) == CXt_FORMAT)
381	{
382	/* I never used formats, so how should I know how these are implemented? */
383	/* my bold guess is as a simple, plain sub... */
384	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
385	}
386	#endif
387	}	384	}
388		385
389	if (top_si->si_type == PERLSI_MAIN)	386	if (top_si->si_type == PERLSI_MAIN)
390	break;	387	break;
391		388
…		…
395	}	392	}
396		393
397	PUTBACK;	394	PUTBACK;
398	}	395	}
399		396
400	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;
401	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	398	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
402	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;
403		401
404	c->dowarn = PL_dowarn;	402	#define VAR(name,type)c->name = PL_ ## name;
405	c->in_eval = PL_in_eval;	403	# include "state.h"
406		404	#undef VAR
407	c->curstackinfo = PL_curstackinfo;
408	c->curstack = PL_curstack;
409	c->mainstack = PL_mainstack;
410	c->stack_sp = PL_stack_sp;
411	c->op = PL_op;
412	c->curpad = PL_curpad;
413	c->comppad = PL_comppad;
414	c->compcv = PL_compcv;
415	c->stack_base = PL_stack_base;
416	c->stack_max = PL_stack_max;
417	c->tmps_stack = PL_tmps_stack;
418	c->tmps_floor = PL_tmps_floor;
419	c->tmps_ix = PL_tmps_ix;
420	c->tmps_max = PL_tmps_max;
421	c->markstack = PL_markstack;
422	c->markstack_ptr = PL_markstack_ptr;
423	c->markstack_max = PL_markstack_max;
424	c->scopestack = PL_scopestack;
425	c->scopestack_ix = PL_scopestack_ix;
426	c->scopestack_max = PL_scopestack_max;
427	c->savestack = PL_savestack;
428	c->savestack_ix = PL_savestack_ix;
429	c->savestack_max = PL_savestack_max;
430	#if PERL_VERSION < 9
431	c->retstack = PL_retstack;
432	c->retstack_ix = PL_retstack_ix;
433	c->retstack_max = PL_retstack_max;
434	#endif
435	c->curpm = PL_curpm;
436	c->curcop = PL_curcop;
437	}	405	}
438		406
439	/*	407	/*
440	* allocate various perl stacks. This is an exact copy	408	* allocate various perl stacks. This is an exact copy
441	* of perl.c:init_stacks, except that it uses less memory	409	* of perl.c:init_stacks, except that it uses less memory
442	* on the (sometimes correct) assumption that coroutines do	410	* on the (sometimes correct) assumption that coroutines do
443	* not usually need a lot of stackspace.	411	* not usually need a lot of stackspace.
444	*/	412	*/
		413	#if PREFER_PERL_FUNCTIONS
		414	# define coro_init_stacks init_stacks
		415	#else
445	static void	416	static void
446	coro_init_stacks (pTHX)	417	coro_init_stacks ()
447	{	418	{
448	LOCK;
449
450	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	419	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
451	PL_curstackinfo->si_type = PERLSI_MAIN;	420	PL_curstackinfo->si_type = PERLSI_MAIN;
452	PL_curstack = PL_curstackinfo->si_stack;	421	PL_curstack = PL_curstackinfo->si_stack;
453	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	422	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454		423
455	PL_stack_base = AvARRAY(PL_curstack);	424	PL_stack_base = AvARRAY(PL_curstack);
456	PL_stack_sp = PL_stack_base;	425	PL_stack_sp = PL_stack_base;
457	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	426	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458		427
459	New(50,PL_tmps_stack,96,SV*);	428	New(50,PL_tmps_stack,128,SV*);
460	PL_tmps_floor = -1;	429	PL_tmps_floor = -1;
461	PL_tmps_ix = -1;	430	PL_tmps_ix = -1;
462	PL_tmps_max = 96;	431	PL_tmps_max = 128;
463		432
464	New(54,PL_markstack,16,I32);	433	New(54,PL_markstack,32,I32);
465	PL_markstack_ptr = PL_markstack;	434	PL_markstack_ptr = PL_markstack;
466	PL_markstack_max = PL_markstack + 16;	435	PL_markstack_max = PL_markstack + 32;
467		436
468	#ifdef SET_MARK_OFFSET	437	#ifdef SET_MARK_OFFSET
469	SET_MARK_OFFSET;	438	SET_MARK_OFFSET;
470	#endif	439	#endif
471		440
472	New(54,PL_scopestack,16,I32);	441	New(54,PL_scopestack,32,I32);
473	PL_scopestack_ix = 0;	442	PL_scopestack_ix = 0;
474	PL_scopestack_max = 16;	443	PL_scopestack_max = 32;
475		444
476	New(54,PL_savestack,96,ANY);	445	New(54,PL_savestack,64,ANY);
477	PL_savestack_ix = 0;	446	PL_savestack_ix = 0;
478	PL_savestack_max = 96;	447	PL_savestack_max = 64;
479		448
480	#if PERL_VERSION < 9	449	#if !PERL_VERSION_ATLEAST (5,9,0)
481	New(54,PL_retstack,8,OP*);	450	New(54,PL_retstack,16,OP*);
482	PL_retstack_ix = 0;	451	PL_retstack_ix = 0;
483	PL_retstack_max = 8;	452	PL_retstack_max = 16;
484	#endif	453	#endif
485
486	UNLOCK;
487	}	454	}
		455	#endif
488		456
489	/*	457	/*
490	* destroy the stacks, the callchain etc...	458	* destroy the stacks, the callchain etc...
491	*/	459	*/
492	static void	460	static void
493	destroy_stacks(pTHX)	461	coro_destroy_stacks ()
494	{	462	{
495	if (!IN_DESTRUCT)	463	if (!IN_DESTRUCT)
496	{	464	{
497	/* is this ugly, I ask? */	465	/* restore all saved variables and stuff */
498	LEAVE_SCOPE (0);	466	LEAVE_SCOPE (0);
		467	assert (PL_tmps_floor == -1);
499		468
500	/* sure it is, but more important: is it correct?? :/ */	469	/* free all temporaries */
501	FREETMPS;	470	FREETMPS;
		471	assert (PL_tmps_ix == -1);
502		472
503	/POPSTACK_TO (PL_mainstack);//D//use/	473	POPSTACK_TO (PL_mainstack);
504	}	474	}
505		475
506	while (PL_curstackinfo->si_next)	476	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;	477	PL_curstackinfo = PL_curstackinfo->si_next;
508		478
509	while (PL_curstackinfo)	479	while (PL_curstackinfo)
510	{	480	{
511	PERL_SI *p = PL_curstackinfo->si_prev;	481	PERL_SI *p = PL_curstackinfo->si_prev;
512		482
513	{ /D//remove/
514	dSP;
515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516	PUTBACK; /* possibly superfluous */
517	}
518
519	if (!IN_DESTRUCT)	483	if (!IN_DESTRUCT)
520	{
521	dounwind (-1);/D//remove/
522	SvREFCNT_dec (PL_curstackinfo->si_stack);	484	SvREFCNT_dec (PL_curstackinfo->si_stack);
523	}
524		485
525	Safefree (PL_curstackinfo->si_cxstack);	486	Safefree (PL_curstackinfo->si_cxstack);
526	Safefree (PL_curstackinfo);	487	Safefree (PL_curstackinfo);
527	PL_curstackinfo = p;	488	PL_curstackinfo = p;
528	}	489	}
529		490
530	Safefree (PL_tmps_stack);	491	Safefree (PL_tmps_stack);
531	Safefree (PL_markstack);	492	Safefree (PL_markstack);
532	Safefree (PL_scopestack);	493	Safefree (PL_scopestack);
533	Safefree (PL_savestack);	494	Safefree (PL_savestack);
534	#if PERL_VERSION < 9	495	#if !PERL_VERSION_ATLEAST (5,9,0)
535	Safefree (PL_retstack);	496	Safefree (PL_retstack);
536	#endif	497	#endif
537	}	498	}
538		499
539	static void	500	static void
540	setup_coro (struct coro *coro)	501	setup_coro (struct coro *coro)
541	{	502	{
542	/*	503	/*
543	* emulate part of the perl startup here.	504	* emulate part of the perl startup here.
544	*/	505	*/
545	dTHX;
546	dSP;
547	UNOP myop;
548	SV sub_init = (SV )get_cv ("Coro::State::coro_init", FALSE);
549		506
550	coro_init_stacks (aTHX);	507	coro_init_stacks ();
551	/PL_curcop = 0;/	508
552	/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
553	SvREFCNT_dec (GvAV (PL_defgv));	520	SvREFCNT_dec (GvAV (PL_defgv));
554	GvAV (PL_defgv) = coro->args; coro->args = 0;	521	GvAV (PL_defgv) = coro->args; coro->args = 0;
555		522
556	SPAGAIN;
557
558	Zero (&myop, 1, UNOP);	523	Zero (&myop, 1, LOGOP);
559	myop.op_next = Nullop;	524	myop.op_next = Nullop;
560	myop.op_flags = OPf_WANT_VOID;	525	myop.op_flags = OPf_WANT_VOID;
561		526
		527	PUSHMARK (SP);
		528	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		529	PUTBACK;
562	PL_op = (OP *)&myop;	530	PL_op = (OP *)&myop;
563
564	PUSHMARK(SP);
565	XPUSHs (sub_init);
566	PUTBACK;
567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	531	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
568	SPAGAIN;	532	SPAGAIN;
		533	}
569		534
570	ENTER; /* necessary e.g. for dounwind */	535	ENTER; /* necessary e.g. for dounwind */
571	}	536	}
572		537
573	static void	538	static void
…		…
578	SvREFCNT_dec (coro_mortal);	543	SvREFCNT_dec (coro_mortal);
579	coro_mortal = 0;	544	coro_mortal = 0;
580	}	545	}
581	}	546	}
582		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
583	static void	569	static void
584	coro_run (void *arg)	570	coro_run (void *arg)
585	{	571	{
		572	/* coro_run is the alternative tail of transfer(), so unlock here. */
		573	UNLOCK;
		574
586	/*	575	/*
587	* this is a _very_ stripped down perl interpreter ;)	576	* this is a _very_ stripped down perl interpreter ;)
588	*/	577	*/
589	dTHX;
590
591	UNLOCK;
592
593	PL_top_env = &PL_start_env;	578	PL_top_env = &PL_start_env;
594		579
595	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));	580	/* inject call to cctx_init */
596	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));	581	prepare_cctx ((coro_cctx *)arg);
597		582
598	/* continue at cctx_init, without entersub */
599	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
600
601	/* somebody will hit me for both perl_run and PL_restart_op */	583	/* somebody will hit me for both perl_run and PL_restartop */
602	perl_run (aTHX_ PERL_GET_CONTEXT);	584	PL_restartop = PL_op;
		585	perl_run (PL_curinterp);
603		586
		587	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
604	abort ();	588	abort ();
605	}	589	}
606		590
607	static coro_stack *	591	static coro_cctx *
608	stack_new ()	592	cctx_new ()
609	{	593	{
610	coro_stack *stack;	594	coro_cctx *cctx;
611		595
		596	++cctx_count;
		597
612	New (0, stack, 1, coro_stack);	598	Newz (0, cctx, 1, coro_cctx);
613		599
614	#if HAVE_MMAP	600	#if HAVE_MMAP
615		601
616	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 */
617	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);
618		605
619	if (stack->sptr == (void *)-1)	606	if (cctx->sptr == (void *)-1)
620	{	607	{
621	perror ("FATAL: unable to mmap stack for coroutine");	608	perror ("FATAL: unable to mmap stack for coroutine");
622	_exit (EXIT_FAILURE);	609	_exit (EXIT_FAILURE);
623	}	610	}
624		611
		612	# if STACKGUARD
625	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	613	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		614	# endif
626		615
627	#else	616	#else
628		617
629	stack->ssize = STACKSIZE * (long)sizeof (long);	618	cctx->ssize = STACKSIZE * (long)sizeof (long);
630	New (0, stack->sptr, STACKSIZE, long);	619	New (0, cctx->sptr, STACKSIZE, long);
631		620
632	if (!stack->sptr)	621	if (!cctx->sptr)
633	{	622	{
634	perror (stderr, "FATAL: unable to malloc stack for coroutine");	623	perror ("FATAL: unable to malloc stack for coroutine");
635	_exit (EXIT_FAILURE);	624	_exit (EXIT_FAILURE);
636	}	625	}
637		626
638	#endif	627	#endif
639		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
640	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	636	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
641		637
642	return stack;	638	return cctx;
643	}	639	}
644		640
645	static void	641	static void
646	stack_free (coro_stack *stack)	642	cctx_destroy (coro_cctx *cctx)
647	{	643	{
648	if (!stack \|\| stack == main_stack)	644	if (!cctx)
649	return;	645	return;
650		646
		647	--cctx_count;
		648
		649	#if USE_VALGRIND
		650	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		651	#endif
		652
651	#if HAVE_MMAP	653	#if HAVE_MMAP
652	munmap (stack->sptr, stack->ssize);	654	munmap (cctx->sptr, cctx->ssize);
653	#else	655	#else
654	Safefree (stack->sptr);	656	Safefree (cctx->sptr);
655	#endif	657	#endif
656		658
657	Safefree (stack);	659	Safefree (cctx);
658	}	660	}
659		661
660	static coro_stack *stack_first;
661
662	static coro_stack *	662	static coro_cctx *
663	stack_get ()	663	cctx_get ()
664	{	664	{
665	coro_stack *stack;	665	coro_cctx *cctx;
666		666
667	if (stack_first)	667	if (cctx_first)
668	{	668	{
669	stack = stack_first;	669	cctx = cctx_first;
670	stack_first = stack->next;	670	cctx_first = cctx->next;
		671	--cctx_idle;
671	}	672	}
672	else	673	else
673	{	674	{
674	stack = stack_new ();	675	cctx = cctx_new ();
675	PL_op = PL_op->op_next;	676	PL_op = PL_op->op_next;
676	}	677	}
677		678
678	return stack;	679	return cctx;
679	}	680	}
680		681
681	static void	682	static void
682	stack_put (coro_stack *stack)	683	cctx_put (coro_cctx *cctx)
683	{	684	{
684	stack->next = stack_first;	685	/* free another cctx if overlimit */
685	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;
686	}	699	}
687		700
688	/* never call directly, always through the coro_state_transfer global variable */	701	/* never call directly, always through the coro_state_transfer global variable */
689	static void	702	static void NOINLINE
690	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)	703	transfer (struct coro prev, struct coro next)
691	{	704	{
692	dSTACKLEVEL;	705	dSTACKLEVEL;
693		706
694	/* sometimes transfer is only called to set idle_sp */	707	/* sometimes transfer is only called to set idle_sp */
695	if (flags == TRANSFER_SET_STACKLEVEL)	708	if (!next)
		709	{
696	((coro_stack *)prev)->idle_sp = STACKLEVEL;	710	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		711	assert (((coro_cctx )prev)->top_env = PL_top_env); / just for the side effetc when assert is enabled */
		712	}
697	else if (prev != next)	713	else if (prev != next)
698	{	714	{
699	coro_stack *prev__stack;	715	coro_cctx *prev__cctx;
		716
		717	if (prev->flags & CF_NEW)
		718	{
		719	/* create a new empty context */
		720	Newz (0, prev->cctx, 1, coro_cctx);
		721	prev->cctx->inuse = 1;
		722	prev->flags &= ~CF_NEW;
		723	prev->flags \|= CF_RUNNING;
		724	}
		725
		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;
700		735
701	LOCK;	736	LOCK;
702		737
703	if (next->mainstack)	738	if (next->flags & CF_NEW)
704	{	739	{
705	/* coroutine already started */	740	/* need to start coroutine */
706	SAVE (prev, flags);	741	next->flags &= ~CF_NEW;
707	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);
708	}	748	}
709	else	749	else
710	{	750	{
711	/* need to start coroutine */	751	/* coroutine already started */
712	/* first get rid of the old state */	752	save_perl (prev);
713	SAVE (prev, -1);	753	load_perl (next);
714	/* setup coroutine call */
715	setup_coro (next);
716	/* need a stack */
717	next->stack = 0;
718	}	754	}
719		755
720	prev__stack = prev->stack;	756	prev__cctx = prev->cctx;
721		757
722	/* possibly "free" the stack */	758	/* possibly "free" the cctx */
723	if (prev__stack->idle_sp == STACKLEVEL)	759	if (prev__cctx->idle_sp == STACKLEVEL)
724	{	760	{
725	stack_put (prev__stack);	761	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		762	assert (PL_top_env == prev__cctx->top_env);
		763
726	prev->stack = 0;	764	prev->cctx = 0;
		765
		766	cctx_put (prev__cctx);
		767	prev__cctx->inuse = 0;
727	}	768	}
728		769
729	if (!next->stack)	770	if (!next->cctx)
730	next->stack = stack_get ();
731
732	if (prev__stack != next->stack)
733	{	771	{
		772	next->cctx = cctx_get ();
		773	assert (!next->cctx->inuse);
		774	next->cctx->inuse = 1;
		775	}
		776
		777	if (prev__cctx != next->cctx)
		778	{
734	prev__stack->top_env = PL_top_env;	779	prev__cctx->top_env = PL_top_env;
735	PL_top_env = next->stack->top_env;	780	PL_top_env = next->cctx->top_env;
736	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	781	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
737	}	782	}
738		783
739	free_coro_mortal ();	784	free_coro_mortal ();
740		785
741	UNLOCK;	786	UNLOCK;
742	}	787	}
743	}	788	}
744		789
745	/* use this function pointer to call the above function */
746	/* this is done to increase chances of the compiler not inlining the call */
747	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
748	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;
749
750	struct transfer_args	790	struct transfer_args
751	{	791	{
752	struct coro prev, next;	792	struct coro prev, next;
753	int flags;
754	};	793	};
755		794
756	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	795	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
757		796
758	static void	797	static void
759	coro_state_destroy (struct coro *coro)	798	coro_state_destroy (struct coro *coro)
760	{	799	{
761	if (coro->refcnt--)	800	if (coro->refcnt--)
762	return;	801	return;
763		802
764	if (coro->mainstack && coro->mainstack != main_mainstack)	803	if (coro->mainstack && coro->mainstack != main_mainstack)
765	{	804	{
766	struct coro temp;	805	struct coro temp;
		806	Zero (&temp, 1, struct coro);
		807	temp.save = CORO_SAVE_ALL;
767		808
768	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	809	if (coro->flags & CF_RUNNING)
769	LOAD (aTHX_ coro);	810	croak ("FATAL: tried to destroy currently running coroutine");
770		811
		812	save_perl (&temp);
		813	load_perl (coro);
		814
771	destroy_stacks (aTHX);	815	coro_destroy_stacks ();
772		816
773	LOAD ((&temp)); /* this will get rid of defsv etc.. */	817	load_perl (&temp); /* this will get rid of defsv etc.. */
774		818
775	coro->mainstack = 0;	819	coro->mainstack = 0;
776	}	820	}
777		821
778	stack_free (coro->stack);	822	cctx_destroy (coro->cctx);
779	SvREFCNT_dec (coro->args);	823	SvREFCNT_dec (coro->args);
780	Safefree (coro);	824	Safefree (coro);
781	}	825	}
782		826
783	static int	827	static int
784	coro_state_clear (SV sv, MAGIC mg)	828	coro_state_clear (pTHX_ SV sv, MAGIC mg)
785	{	829	{
786	struct coro coro = (struct coro )mg->mg_ptr;	830	struct coro coro = (struct coro )mg->mg_ptr;
787	mg->mg_ptr = 0;	831	mg->mg_ptr = 0;
788		832
789	coro_state_destroy (coro);	833	coro_state_destroy (coro);
790		834
791	return 0;	835	return 0;
792	}	836	}
793		837
794	static int	838	static int
795	coro_state_dup (MAGIC mg, CLONE_PARAMS params)	839	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
796	{	840	{
797	struct coro coro = (struct coro )mg->mg_ptr;	841	struct coro coro = (struct coro )mg->mg_ptr;
798		842
799	++coro->refcnt;	843	++coro->refcnt;
800		844
801	return 0;	845	return 0;
802	}	846	}
803		847
804	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	};
805		858
806	static struct coro *	859	static struct coro *
807	SvSTATE (SV *coro)	860	SvSTATE (SV *coro)
808	{	861	{
809	HV *stash;	862	HV *stash;
…		…
824	assert (mg->mg_type == PERL_MAGIC_ext);	877	assert (mg->mg_type == PERL_MAGIC_ext);
825	return (struct coro *)mg->mg_ptr;	878	return (struct coro *)mg->mg_ptr;
826	}	879	}
827		880
828	static void	881	static void
829	prepare_transfer (pTHX_ struct transfer_args ta, SV prev, SV *next, int flags)	882	prepare_transfer (struct transfer_args ta, SV prev_sv, SV *next_sv)
830	{	883	{
831	ta->prev = SvSTATE (prev);	884	ta->prev = SvSTATE (prev_sv);
832	ta->next = SvSTATE (next);	885	ta->next = SvSTATE (next_sv);
833	ta->flags = flags;
834	}	886	}
835		887
836	static void	888	static void
837	api_transfer (SV prev, SV next, int flags)	889	api_transfer (SV prev_sv, SV next_sv)
838	{	890	{
839	dTHX;
840	struct transfer_args ta;	891	struct transfer_args ta;
841		892
842	prepare_transfer (aTHX_ &ta, prev, next, flags);	893	prepare_transfer (&ta, prev_sv, next_sv);
843	TRANSFER (ta);	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;
844	}	907	}
845		908
846	/ Coro ******************************************************************/	909	/ Coro ******************************************************************/
847		910
848	#define PRIO_MAX 3	911	#define PRIO_MAX 3
…		…
851	#define PRIO_LOW -1	914	#define PRIO_LOW -1
852	#define PRIO_IDLE -3	915	#define PRIO_IDLE -3
853	#define PRIO_MIN -4	916	#define PRIO_MIN -4
854		917
855	/* for Coro.pm */	918	/* for Coro.pm */
856	static GV coro_current, coro_idle;	919	static SV *coro_current;
857	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	920	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
858	static int coro_nready;	921	static int coro_nready;
859		922
860	static void	923	static void
861	coro_enq (pTHX_ SV *sv)	924	coro_enq (SV *coro_sv)
862	{	925	{
863	int prio;
864
865	if (SvTYPE (sv) != SVt_PVHV)
866	croak ("Coro::ready tried to enqueue something that is not a coroutine");
867
868	prio = SvSTATE (sv)->prio;
869
870	av_push (coro_ready [prio - PRIO_MIN], sv);	926	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
871	coro_nready++;	927	coro_nready++;
872	}	928	}
873		929
874	static SV *	930	static SV *
875	coro_deq (pTHX_ int min_prio)	931	coro_deq (int min_prio)
876	{	932	{
877	int prio = PRIO_MAX - PRIO_MIN;	933	int prio = PRIO_MAX - PRIO_MIN;
878		934
879	min_prio -= PRIO_MIN;	935	min_prio -= PRIO_MIN;
880	if (min_prio < 0)	936	if (min_prio < 0)
…		…
888	}	944	}
889		945
890	return 0;	946	return 0;
891	}	947	}
892		948
893	static void	949	static int
894	api_ready (SV *coro)	950	api_ready (SV *coro_sv)
895	{	951	{
896	dTHX;	952	struct coro *coro;
897		953
898	if (SvROK (coro))	954	if (SvROK (coro_sv))
899	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;
900		968
901	LOCK;	969	LOCK;
902	coro_enq (aTHX_ SvREFCNT_inc (coro));	970	coro_enq (SvREFCNT_inc (coro_sv));
903	UNLOCK;	971	UNLOCK;
904	}
905		972
		973	return 1;
		974	}
		975
906	static void	976	static int
		977	api_is_ready (SV *coro_sv)
		978	{
		979	return !!SvSTATE (coro_sv)->flags & CF_READY;
		980	}
		981
		982	static void
907	prepare_schedule (aTHX_ struct transfer_args *ta)	983	prepare_schedule (struct transfer_args *ta)
908	{	984	{
909	SV current, prev, *next;	985	SV prev, next;
910
911	LOCK;
912
913	current = GvSV (coro_current);
914		986
915	for (;;)	987	for (;;)
916	{	988	{
917	LOCK;	989	LOCK;
918
919	next = coro_deq (aTHX_ PRIO_MIN);	990	next = coro_deq (PRIO_MIN);
		991	UNLOCK;
920		992
921	if (next)	993	if (next)
922	break;	994	break;
923		995
924	UNLOCK;
925
926	{	996	{
927	dSP;	997	dSP;
928		998
929	ENTER;	999	ENTER;
930	SAVETMPS;	1000	SAVETMPS;
931		1001
932	PUSHMARK (SP);	1002	PUSHMARK (SP);
933	PUTBACK;	1003	PUTBACK;
934	call_sv (GvSV (coro_idle), G_DISCARD);	1004	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
935		1005
936	FREETMPS;	1006	FREETMPS;
937	LEAVE;	1007	LEAVE;
938	}	1008	}
939	}	1009	}
940		1010
941	prev = SvRV (current);	1011	prev = SvRV (coro_current);
942	SvRV (current) = next;	1012	SvRV_set (coro_current, next);
943		1013
944	/* free this only after the transfer */	1014	/* free this only after the transfer */
		1015	LOCK;
945	free_coro_mortal ();	1016	free_coro_mortal ();
		1017	UNLOCK;
946	coro_mortal = prev;	1018	coro_mortal = prev;
947		1019
		1020	assert (!SvROK(prev));//D
		1021	assert (!SvROK(next));//D
		1022
948	ta->prev = SvSTATE (prev);	1023	ta->prev = SvSTATE (prev);
949	ta->next = SvSTATE (next);	1024	ta->next = SvSTATE (next);
950	ta->flags = TRANSFER_SAVE_ALL;
951		1025
952	UNLOCK;	1026	assert (ta->next->flags & CF_READY);
		1027	ta->next->flags &= ~CF_READY;
953	}	1028	}
954		1029
955	static void	1030	static void
956	prepare_cede (aTHX_ struct transfer_args *ta)	1031	prepare_cede (struct transfer_args *ta)
957	{	1032	{
958	LOCK;	1033	api_ready (coro_current);
959	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
960	UNLOCK;
961		1034
962	prepare_schedule (ta);	1035	prepare_schedule (ta);
963	}	1036	}
964		1037
965	static void	1038	static void
966	api_schedule (void)	1039	api_schedule (void)
967	{	1040	{
968	dTHX;
969	struct transfer_args ta;	1041	struct transfer_args ta;
970		1042
971	prepare_schedule (&ta);	1043	prepare_schedule (&ta);
972	TRANSFER (ta);	1044	TRANSFER (ta);
973	}	1045	}
974		1046
975	static void	1047	static void
976	api_cede (void)	1048	api_cede (void)
977	{	1049	{
978	dTHX;
979	struct transfer_args ta;	1050	struct transfer_args ta;
980		1051
981	prepare_cede (&ta);	1052	prepare_cede (&ta);
982	TRANSFER (ta);	1053	TRANSFER (ta);
983	}	1054	}
…		…
993	#endif	1064	#endif
994	BOOT_PAGESIZE;	1065	BOOT_PAGESIZE;
995		1066
996	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1067	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
997		1068
998	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1069	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
999	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1070	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1000	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));
1001		1074
1002	main_mainstack = PL_mainstack;	1075	main_mainstack = PL_mainstack;
1003		1076
1004	coroapi.ver = CORO_API_VERSION;	1077	coroapi.ver = CORO_API_VERSION;
1005	coroapi.transfer = api_transfer;	1078	coroapi.transfer = api_transfer;
1006
1007	Newz (0, main_stack, 1, coro_stack);
1008	main_stack->idle_sp = (void *)-1;
1009		1079
1010	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1080	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1011	}	1081	}
1012		1082
1013	SV *	1083	SV *
…		…
1018	HV *hv;	1088	HV *hv;
1019	int i;	1089	int i;
1020		1090
1021	Newz (0, coro, 1, struct coro);	1091	Newz (0, coro, 1, struct coro);
1022	coro->args = newAV ();	1092	coro->args = newAV ();
		1093	coro->save = CORO_SAVE_ALL;
		1094	coro->flags = CF_NEW;
1023		1095
1024	hv = newHV ();	1096	hv = newHV ();
1025	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;
1026	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1098	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1027		1099
1028	for (i = 1; i < items; i++)	1100	for (i = 1; i < items; i++)
1029	av_push (coro->args, newSVsv (ST (i)));	1101	av_push (coro->args, newSVsv (ST (i)));
1030
1031	coro->stack = main_stack;
1032	/coro->mainstack = 0; //actual work is done inside transfer /
1033	/coro->stack = 0;/
1034	}	1102	}
1035	OUTPUT:	1103	OUTPUT:
1036	RETVAL	1104	RETVAL
1037		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
1038	void	1113	void
1039	transfer (...)	1114	_set_stacklevel (...)
1040	ALIAS:	1115	ALIAS:
1041	Coro::schedule = 1	1116	Coro::State::transfer = 1
1042	Coro::cede = 2	1117	Coro::schedule = 2
1043	_set_stacklevel = 3	1118	Coro::cede = 3
1044	CODE:	1119	CODE:
1045	{	1120	{
1046	struct transfer_args ta;	1121	struct transfer_args ta;
1047		1122
1048	switch (ix)	1123	switch (ix)
1049	{	1124	{
1050	case 0:	1125	case 0:
1051	if (items != 3)	1126	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1052	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1127	ta.next = 0;
1053
1054	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1055	break;	1128	break;
1056		1129
1057	case 1:	1130	case 1:
		1131	if (items != 2)
		1132	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1133
		1134	prepare_transfer (&ta, ST (0), ST (1));
		1135	break;
		1136
		1137	case 2:
1058	prepare_schedule (&ta);	1138	prepare_schedule (&ta);
1059	break;	1139	break;
1060		1140
1061	case 2:	1141	case 3:
1062	prepare_cede (&ta);	1142	prepare_cede (&ta);
1063	break;
1064
1065	case 3:
1066	ta.prev = (struct coro )INT2PTR (coro_stack , SvIV (ST (0)));
1067	ta.next = 0;
1068	ta.flags = TRANSFER_SET_STACKLEVEL;
1069	break;	1143	break;
1070	}	1144	}
1071		1145
1072	TRANSFER (ta);	1146	TRANSFER (ta);
1073	}	1147	}
…		…
1081	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);	1155	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1082		1156
1083	++coro_src->refcnt;	1157	++coro_src->refcnt;
1084	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;	1158	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1085	}	1159	}
1086
1087	void
1088	_nonlocal_goto (IV nextop)
1089	CODE:
1090	/* uuh, somebody will kill me again for this */
1091	PL_op->op_next = INT2PTR (OP *, nextop);
1092		1160
1093	void	1161	void
1094	_exit (code)	1162	_exit (code)
1095	int code	1163	int code
1096	PROTOTYPE: $	1164	PROTOTYPE: $
1097	CODE:	1165	CODE:
1098	_exit (code);	1166	_exit (code);
1099		1167
1100	MODULE = Coro::State PACKAGE = Coro::Cont	1168	int
		1169	cctx_count ()
		1170	CODE:
		1171	RETVAL = cctx_count;
		1172	OUTPUT:
		1173	RETVAL
1101		1174
1102	void	1175	int
1103	yield (...)	1176	cctx_idle ()
1104	PROTOTYPE: @	1177	CODE:
1105	CODE:	1178	RETVAL = cctx_idle;
1106	{	1179	OUTPUT:
1107	SV *yieldstack;	1180	RETVAL
1108	SV *sv;
1109	AV *defav = GvAV (PL_defgv);
1110	struct coro prev, next;
1111
1112	yieldstack = *hv_fetch (
1113	(HV *)SvRV (GvSV (coro_current)),
1114	"yieldstack", sizeof ("yieldstack") - 1,
1115	0
1116	);
1117
1118	/* set up @_ -- ugly */
1119	av_clear (defav);
1120	av_fill (defav, items - 1);
1121	while (items--)
1122	av_store (defav, items, SvREFCNT_inc (ST(items)));
1123
1124	sv = av_pop ((AV *)SvRV (yieldstack));
1125	prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1126	next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1127	SvREFCNT_dec (sv);
1128
1129	coro_state_transfer (aTHX_ prev, next, 0);
1130	}
1131		1181
1132	MODULE = Coro::State PACKAGE = Coro	1182	MODULE = Coro::State PACKAGE = Coro
1133		1183
1134	BOOT:	1184	BOOT:
1135	{	1185	{
…		…
1142	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1192	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1143	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1193	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1144	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1194	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1145	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1195	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1146		1196
1147	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1197	coro_current = get_sv ("Coro::current", FALSE);
1148	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1198	SvREADONLY_on (coro_current);
1149		1199
1150	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1200	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1151	coro_ready[i] = newAV ();	1201	coro_ready[i] = newAV ();
1152		1202
1153	{	1203	{
1154	SV *sv = perl_get_sv("Coro::API", 1);	1204	SV *sv = perl_get_sv("Coro::API", 1);
1155		1205
1156	coroapi.schedule = api_schedule;	1206	coroapi.schedule = api_schedule;
		1207	coroapi.save = api_save;
1157	coroapi.cede = api_cede;	1208	coroapi.cede = api_cede;
1158	coroapi.ready = api_ready;	1209	coroapi.ready = api_ready;
		1210	coroapi.is_ready = api_is_ready;
1159	coroapi.nready = &coro_nready;	1211	coroapi.nready = &coro_nready;
1160	coroapi.current = coro_current;	1212	coroapi.current = coro_current;
1161		1213
1162	GCoroAPI = &coroapi;	1214	GCoroAPI = &coroapi;
1163	sv_setiv (sv, (IV)&coroapi);	1215	sv_setiv (sv, (IV)&coroapi);
1164	SvREADONLY_on (sv);	1216	SvREADONLY_on (sv);
1165	}	1217	}
1166	}	1218	}
		1219
		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)));
1167		1226
1168	int	1227	int
1169	prio (Coro::State coro, int newprio = 0)	1228	prio (Coro::State coro, int newprio = 0)
1170	ALIAS:	1229	ALIAS:
1171	nice = 1	1230	nice = 1
…		…
1183		1242
1184	coro->prio = newprio;	1243	coro->prio = newprio;
1185	}	1244	}
1186	}	1245	}
1187		1246
1188	void	1247	SV *
1189	ready (SV *self)	1248	ready (SV *self)
1190	PROTOTYPE: $	1249	PROTOTYPE: $
1191	CODE:	1250	CODE:
1192	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
1193		1262
1194	int	1263	int
1195	nready (...)	1264	nready (...)
1196	PROTOTYPE:	1265	PROTOTYPE:
1197	CODE:	1266	CODE:
…		…
1203		1272
1204	SV *	1273	SV *
1205	_get_state ()	1274	_get_state ()
1206	CODE:	1275	CODE:
1207	{	1276	{
1208	struct {	1277	struct io_state *data;
1209	int errorno;
1210	int laststype;
1211	int laststatval;
1212	Stat_t statcache;
1213	} data;
1214		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
1215	data.errorno = errno;	1284	data->errorno = errno;
1216	data.laststype = PL_laststype;	1285	data->laststype = PL_laststype;
1217	data.laststatval = PL_laststatval;	1286	data->laststatval = PL_laststatval;
1218	data.statcache = PL_statcache;	1287	data->statcache = PL_statcache;
1219
1220	RETVAL = newSVpvn ((char *)&data, sizeof data);
1221	}	1288	}
1222	OUTPUT:	1289	OUTPUT:
1223	RETVAL	1290	RETVAL
1224		1291
1225	void	1292	void
1226	_set_state (char *data_)	1293	_set_state (char *data_)
1227	PROTOTYPE: $	1294	PROTOTYPE: $
1228	CODE:	1295	CODE:
1229	{	1296	{
1230	struct {	1297	struct io_state data = (void )data_;
1231	int errorno;
1232	int laststype;
1233	int laststatval;
1234	Stat_t statcache;
1235	} data = (void )data_;
1236		1298
1237	errno = data->errorno;	1299	errno = data->errorno;
1238	PL_laststype = data->laststype;	1300	PL_laststype = data->laststype;
1239	PL_laststatval = data->laststatval;	1301	PL_laststatval = data->laststatval;
1240	PL_statcache = data->statcache;	1302	PL_statcache = data->statcache;
1241	}	1303	}
		1304

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Comparing Coro/Coro/State.xs (file contents): Revision 1.93 by root, Sun Nov 26 03:22:50 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 1.93 by root, Sun Nov 26 03:22:50 2006 UTC vs.
Revision 1.127 by root, Tue Dec 12 13:56:45 2006 UTC