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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.122 by root, Mon Dec 4 13:47:56 2006 UTC vs.
Revision 1.151 by root, Wed Sep 19 21:39:15 2007 UTC

…		…
1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	/* the maximum number of idle cctx that will be pooled */
14	#define MAX_IDLE_CCTX 8
15
16	#define PERL_VERSION_ATLEAST(a,b,c) \
17	(PERL_REVISION > (a) \
18	\|\| (PERL_REVISION == (a) \
19	&& (PERL_VERSION > (b) \
20	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22	#if !PERL_VERSION_ATLEAST (5,6,0)
23	# ifndef PL_ppaddr
24	# define PL_ppaddr ppaddr
25	# endif
26	# ifndef call_sv
27	# define call_sv perl_call_sv
28	# endif
29	# ifndef get_sv
30	# define get_sv perl_get_sv
31	# endif
32	# ifndef get_cv
33	# define get_cv perl_get_cv
34	# endif
35	# ifndef IS_PADGV
36	# define IS_PADGV(v) 0
37	# endif
38	# ifndef IS_PADCONST
39	# define IS_PADCONST(v) 0
40	# endif
41	#endif
42
43	#include <stdio.h>	11	#include <stdio.h>
44	#include <errno.h>	12	#include <errno.h>
45		13	#include <assert.h>
46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	# undef STACKGUARD
48	#endif
49
50	#ifndef STACKGUARD
51	# define STACKGUARD 0
52	#endif
53		14
54	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
55	# include <unistd.h>	16	# include <unistd.h>
56	# include <sys/mman.h>	17	# include <sys/mman.h>
57	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
72	#else	33	#else
73	# define PAGESIZE 0	34	# define PAGESIZE 0
74	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
75	#endif	36	#endif
76		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	\|\| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
		55	# ifndef PL_ppaddr
		56	# define PL_ppaddr ppaddr
		57	# endif
		58	# ifndef call_sv
		59	# define call_sv perl_call_sv
		60	# endif
		61	# ifndef get_sv
		62	# define get_sv perl_get_sv
		63	# endif
		64	# ifndef get_cv
		65	# define get_cv perl_get_cv
		66	# endif
		67	# ifndef IS_PADGV
		68	# define IS_PADGV(v) 0
		69	# endif
		70	# ifndef IS_PADCONST
		71	# define IS_PADCONST(v) 0
		72	# endif
		73	#endif
		74
		75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		81	# undef CORO_STACKGUARD
		82	#endif
		83
		84	#ifndef CORO_STACKGUARD
		85	# define CORO_STACKGUARD 0
		86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
77	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macro should declare a variable stacklevel that contains and approximation
78	* to the current C stack pointer. Its property is that it changes with each call	94	* to the current C stack pointer. Its property is that it changes with each call
79	* and should be unique. */	95	* and should be unique. */
80	#define dSTACKLEVEL int stacklevel	96	#define dSTACKLEVEL int stacklevel
81	#define STACKLEVEL ((void *)&stacklevel)	97	#define STACKLEVEL ((void *)&stacklevel)
82		98
83	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
84		100
85	#if __GNUC__ >= 3	101	#if __GNUC__ >= 3
86	# define attribute(x) __attribute__(x)	102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
87	#else	104	#else
88	# define attribute(x)	105	# define attribute(x)
		106	# define BARRIER
89	#endif	107	#endif
90		108
91	#define NOINLINE attribute ((noinline))	109	#define NOINLINE attribute ((noinline))
92		110
93	#include "CoroAPI.h"	111	#include "CoroAPI.h"
…		…
99	#else	117	#else
100	# define LOCK (void)0	118	# define LOCK (void)0
101	# define UNLOCK (void)0	119	# define UNLOCK (void)0
102	#endif	120	#endif
103		121
		122	/* helper storage struct for Coro::AIO */
104	struct io_state	123	struct io_state
105	{	124	{
106	int errorno;	125	int errorno;
107	I32 laststype;	126	I32 laststype;
108	int laststatval;	127	int laststatval;
109	Stat_t statcache;	128	Stat_t statcache;
110	};	129	};
111		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
112	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
113	static AV main_mainstack; / used to differentiate between $main and others */	133	static AV main_mainstack; / used to differentiate between $main and others */
		134	static JMPENV *main_top_env;
114	static HV coro_state_stash, coro_stash;	135	static HV coro_state_stash, coro_stash;
115	static SV coro_mortal; / will be freed after next transfer */	136	static SV coro_mortal; / will be freed after next transfer */
116		137
117	static struct coro_cctx *cctx_first;	138	static struct coro_cctx *cctx_first;
118	static int cctx_count, cctx_idle;	139	static int cctx_count, cctx_idle;
…		…
121	typedef struct coro_cctx {	142	typedef struct coro_cctx {
122	struct coro_cctx *next;	143	struct coro_cctx *next;
123		144
124	/* the stack */	145	/* the stack */
125	void *sptr;	146	void *sptr;
126	long ssize; /* positive == mmap, otherwise malloc */	147	size_t ssize;
127		148
128	/* cpu state */	149	/* cpu state */
129	void idle_sp; / sp of top-level transfer/schedule/cede call */	150	void idle_sp; / sp of top-level transfer/schedule/cede call */
		151	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
130	JMPENV *top_env;	152	JMPENV *top_env;
131	coro_context cctx;	153	coro_context cctx;
132		154
133	int inuse;
134
135	#if USE_VALGRIND	155	#if CORO_USE_VALGRIND
136	int valgrind_id;	156	int valgrind_id;
137	#endif	157	#endif
		158	char inuse, mapped;
138	} coro_cctx;	159	} coro_cctx;
139		160
140	enum {	161	enum {
141	CF_RUNNING = 0x0001, /* coroutine is running */	162	CF_RUNNING = 0x0001, /* coroutine is running */
142	CF_READY = 0x0002, /* coroutine is ready */	163	CF_READY = 0x0002, /* coroutine is ready */
143	CF_NEW = 0x0004, /* ahs never been switched to */	164	CF_NEW = 0x0004, /* has never been switched to */
		165	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
144	};	166	};
145		167
146	/* this is a structure representing a perl-level coroutine */	168	/* this is a structure representing a perl-level coroutine */
147	struct coro {	169	struct coro {
148	/* the c coroutine allocated to this perl coroutine, if any */	170	/* the c coroutine allocated to this perl coroutine, if any */
…		…
156		178
157	/* optionally saved, might be zero */	179	/* optionally saved, might be zero */
158	AV defav; / @_ */	180	AV defav; / @_ */
159	SV defsv; / $_ */	181	SV defsv; / $_ */
160	SV errsv; / $@ */	182	SV errsv; / $@ */
		183	GV deffh; / default filehandle */
161	SV irssv; / $/ */	184	SV irssv; / $/ */
		185	SV irssv_sv; / real $/ cache */
162		186
163	#define VAR(name,type) type name;	187	#define VAR(name,type) type name;
164	# include "state.h"	188	# include "state.h"
165	#undef VAR	189	#undef VAR
166		190
167	/* coro process data */	191	/* coro process data */
168	int prio;	192	int prio;
		193
		194	/* linked list */
		195	struct coro next, prev;
		196	HV hv; / the perl hash associated with this coro, if any */
169	};	197	};
170		198
171	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
172	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
173		201
		202	/ Coro ******************************************************************/
		203
		204	#define PRIO_MAX 3
		205	#define PRIO_HIGH 1
		206	#define PRIO_NORMAL 0
		207	#define PRIO_LOW -1
		208	#define PRIO_IDLE -3
		209	#define PRIO_MIN -4
		210
		211	/* for Coro.pm */
		212	static SV *coro_current;
		213	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		214	static int coro_nready;
		215	static struct coro *first;
		216
		217	/ lowlevel stuff ********************************************************/
		218
174	static AV *	219	static AV *
175	coro_clone_padlist (CV *cv)	220	coro_clone_padlist (pTHX_ CV *cv)
176	{	221	{
177	AV *padlist = CvPADLIST (cv);	222	AV *padlist = CvPADLIST (cv);
178	AV newpadlist, newpad;	223	AV newpadlist, newpad;
179		224
180	newpadlist = newAV ();	225	newpadlist = newAV ();
…		…
192		237
193	return newpadlist;	238	return newpadlist;
194	}	239	}
195		240
196	static void	241	static void
197	free_padlist (AV *padlist)	242	free_padlist (pTHX_ AV *padlist)
198	{	243	{
199	/* may be during global destruction */	244	/* may be during global destruction */
200	if (SvREFCNT (padlist))	245	if (SvREFCNT (padlist))
201	{	246	{
202	I32 i = AvFILLp (padlist);	247	I32 i = AvFILLp (padlist);
…		…
223	AV *padlist;	268	AV *padlist;
224	AV av = (AV )mg->mg_obj;	269	AV av = (AV )mg->mg_obj;
225		270
226	/* casting is fun. */	271	/* casting is fun. */
227	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	272	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
228	free_padlist (padlist);	273	free_padlist (aTHX_ padlist);
229		274
230	SvREFCNT_dec (av);	275	SvREFCNT_dec (av);
231		276
232	return 0;	277	return 0;
233	}	278	}
…		…
243	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	288	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
244	: 0	289	: 0
245		290
246	/* the next two functions merely cache the padlists */	291	/* the next two functions merely cache the padlists */
247	static void	292	static void
248	get_padlist (CV *cv)	293	get_padlist (pTHX_ CV *cv)
249	{	294	{
250	MAGIC *mg = CORO_MAGIC (cv);	295	MAGIC *mg = CORO_MAGIC (cv);
251	AV *av;	296	AV *av;
252		297
253	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
254	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
255	else	300	else
256	{	301	{
257	#if 0	302	#if CORO_PREFER_PERL_FUNCTIONS
258	/* this is probably cleaner, but also slower? */	303	/* this is probably cleaner, but also slower? */
259	CV *cp = Perl_cv_clone (cv);	304	CV *cp = Perl_cv_clone (cv);
260	CvPADLIST (cv) = CvPADLIST (cp);	305	CvPADLIST (cv) = CvPADLIST (cp);
261	CvPADLIST (cp) = 0;	306	CvPADLIST (cp) = 0;
262	SvREFCNT_dec (cp);	307	SvREFCNT_dec (cp);
263	#else	308	#else
264	CvPADLIST (cv) = coro_clone_padlist (cv);	309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
265	#endif	310	#endif
266	}	311	}
267	}	312	}
268		313
269	static void	314	static void
270	put_padlist (CV *cv)	315	put_padlist (pTHX_ CV *cv)
271	{	316	{
272	MAGIC *mg = CORO_MAGIC (cv);	317	MAGIC *mg = CORO_MAGIC (cv);
273	AV *av;	318	AV *av;
274		319
275	if (!mg)	320	if (!mg)
…		…
286	av_extend (av, AvMAX (av) + 1);	331	av_extend (av, AvMAX (av) + 1);
287		332
288	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	333	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
289	}	334	}
290		335
		336	/ load & save, init *****************************************************/
		337
291	#define SB do {	338	#define SB do {
292	#define SE } while (0)	339	#define SE } while (0)
293		340
294	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE	341	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
295		342
296	static void	343	static void
297	load_perl (Coro__State c)	344	load_perl (pTHX_ Coro__State c)
298	{	345	{
299	#define VAR(name,type) PL_ ## name = c->name;	346	#define VAR(name,type) PL_ ## name = c->name;
300	# include "state.h"	347	# include "state.h"
301	#undef VAR	348	#undef VAR
302		349
303	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
304	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
305	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	352	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
306	if (c->irssv) REPLACE_SV (PL_rs , c->irssv);	353	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		354
		355	if (c->irssv)
		356	{
		357	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
		358	{
		359	SvREFCNT_dec (c->irssv);
		360	c->irssv = 0;
		361	}
		362	else
		363	{
		364	REPLACE_SV (PL_rs, c->irssv);
		365	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		366	sv_setsv (c->irssv_sv, PL_rs);
		367	}
		368	}
307		369
308	{	370	{
309	dSP;	371	dSP;
310	CV *cv;	372	CV *cv;
311		373
312	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
313	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
314	{	376	{
315	put_padlist (cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
316	CvDEPTH (cv) = PTR2IV (POPs);	378	CvDEPTH (cv) = PTR2IV (POPs);
317	CvPADLIST (cv) = (AV *)POPs;	379	CvPADLIST (cv) = (AV *)POPs;
318	}	380	}
319		381
320	PUTBACK;	382	PUTBACK;
321	}	383	}
322	}	384	}
323		385
324	static void	386	static void
325	save_perl (Coro__State c)	387	save_perl (pTHX_ Coro__State c)
326	{	388	{
327	{	389	{
328	dSP;	390	dSP;
329	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
330	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
…		…
333	/*	395	/*
334	* the worst thing you can imagine happens first - we have to save	396	* the worst thing you can imagine happens first - we have to save
335	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
336	*/	398	*/
337		399
		400	EXTEND (SP, 3 + 1);
338	PUSHs (Nullsv);	401	PUSHs (Nullsv);
339	/* this loop was inspired by pp_caller */	402	/* this loop was inspired by pp_caller */
340	for (;;)	403	for (;;)
341	{	404	{
342	while (cxix >= 0)	405	while (cxix >= 0)
343	{	406	{
344	PERL_CONTEXT *cx = &ccstk[cxix--];	407	PERL_CONTEXT *cx = &ccstk[cxix--];
345		408
346	if (CxTYPE (cx) == CXt_SUB)	409	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
347	{	410	{
348	CV *cv = cx->blk_sub.cv;	411	CV *cv = cx->blk_sub.cv;
349		412
350	if (CvDEPTH (cv))	413	if (CvDEPTH (cv))
351	{	414	{
352	EXTEND (SP, 3);	415	EXTEND (SP, 3);
353
354	PUSHs ((SV *)CvPADLIST (cv));	416	PUSHs ((SV *)CvPADLIST (cv));
355	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	417	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
356	PUSHs ((SV *)cv);	418	PUSHs ((SV *)cv);
357		419
358	CvDEPTH (cv) = 0;	420	CvDEPTH (cv) = 0;
359	get_padlist (cv);	421	get_padlist (aTHX_ cv);
360	}	422	}
361	}	423	}
362	#ifdef CXt_FORMAT
363	else if (CxTYPE (cx) == CXt_FORMAT)
364	{
365	/* I never used formats, so how should I know how these are implemented? */
366	/* my bold guess is as a simple, plain sub... */
367	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
368	}
369	#endif
370	}	424	}
371		425
372	if (top_si->si_type == PERLSI_MAIN)	426	if (top_si->si_type == PERLSI_MAIN)
373	break;	427	break;
374		428
…		…
381	}	435	}
382		436
383	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	437	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
384	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	438	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
385	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	439	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		440	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
386	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	441	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
387		442
388	#define VAR(name,type)c->name = PL_ ## name;	443	#define VAR(name,type)c->name = PL_ ## name;
389	# include "state.h"	444	# include "state.h"
390	#undef VAR	445	#undef VAR
…		…
394	* allocate various perl stacks. This is an exact copy	449	* allocate various perl stacks. This is an exact copy
395	* of perl.c:init_stacks, except that it uses less memory	450	* of perl.c:init_stacks, except that it uses less memory
396	* on the (sometimes correct) assumption that coroutines do	451	* on the (sometimes correct) assumption that coroutines do
397	* not usually need a lot of stackspace.	452	* not usually need a lot of stackspace.
398	*/	453	*/
		454	#if CORO_PREFER_PERL_FUNCTIONS
		455	# define coro_init_stacks init_stacks
		456	#else
399	static void	457	static void
400	coro_init_stacks ()	458	coro_init_stacks (pTHX)
401	{	459	{
402	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	460	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
403	PL_curstackinfo->si_type = PERLSI_MAIN;	461	PL_curstackinfo->si_type = PERLSI_MAIN;
404	PL_curstack = PL_curstackinfo->si_stack;	462	PL_curstack = PL_curstackinfo->si_stack;
405	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	463	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
433	New(54,PL_retstack,16,OP*);	491	New(54,PL_retstack,16,OP*);
434	PL_retstack_ix = 0;	492	PL_retstack_ix = 0;
435	PL_retstack_max = 16;	493	PL_retstack_max = 16;
436	#endif	494	#endif
437	}	495	}
		496	#endif
438		497
439	/*	498	/*
440	* destroy the stacks, the callchain etc...	499	* destroy the stacks, the callchain etc...
441	*/	500	*/
442	static void	501	static void
443	coro_destroy_stacks ()	502	coro_destroy_stacks (pTHX)
444	{	503	{
445	if (!IN_DESTRUCT)	504	if (!IN_DESTRUCT)
446	{	505	{
447	/* is this ugly, I ask? */	506	/* restore all saved variables and stuff */
448	LEAVE_SCOPE (0);	507	LEAVE_SCOPE (0);
		508	assert (PL_tmps_floor == -1);
449		509
450	/* sure it is, but more important: is it correct?? :/ */	510	/* free all temporaries */
451	FREETMPS;	511	FREETMPS;
		512	assert (PL_tmps_ix == -1);
452		513
		514	/* unwind all extra stacks */
453	/POPSTACK_TO (PL_mainstack);//D//use/	515	POPSTACK_TO (PL_mainstack);
		516
		517	/* unwind main stack */
		518	dounwind (-1);
454	}	519	}
455		520
456	while (PL_curstackinfo->si_next)	521	while (PL_curstackinfo->si_next)
457	PL_curstackinfo = PL_curstackinfo->si_next;	522	PL_curstackinfo = PL_curstackinfo->si_next;
458		523
459	while (PL_curstackinfo)	524	while (PL_curstackinfo)
460	{	525	{
461	PERL_SI *p = PL_curstackinfo->si_prev;	526	PERL_SI *p = PL_curstackinfo->si_prev;
462		527
463	{ /D//remove/
464	dSP;
465	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
466	PUTBACK; /* possibly superfluous */
467	}
468
469	if (!IN_DESTRUCT)	528	if (!IN_DESTRUCT)
470	{
471	dounwind (-1);/D//remove/
472	SvREFCNT_dec (PL_curstackinfo->si_stack);	529	SvREFCNT_dec (PL_curstackinfo->si_stack);
473	}
474		530
475	Safefree (PL_curstackinfo->si_cxstack);	531	Safefree (PL_curstackinfo->si_cxstack);
476	Safefree (PL_curstackinfo);	532	Safefree (PL_curstackinfo);
477	PL_curstackinfo = p;	533	PL_curstackinfo = p;
478	}	534	}
…		…
484	#if !PERL_VERSION_ATLEAST (5,9,0)	540	#if !PERL_VERSION_ATLEAST (5,9,0)
485	Safefree (PL_retstack);	541	Safefree (PL_retstack);
486	#endif	542	#endif
487	}	543	}
488		544
		545	/ coroutine stack handling **********************************************/
		546
489	static void	547	static void
490	setup_coro (struct coro *coro)	548	setup_coro (pTHX_ struct coro *coro)
491	{	549	{
492	/*	550	/*
493	* emulate part of the perl startup here.	551	* emulate part of the perl startup here.
494	*/	552	*/
495
496	coro_init_stacks ();	553	coro_init_stacks (aTHX);
497		554
498	PL_curcop = &PL_compiling;	555	PL_curcop = &PL_compiling;
499	PL_in_eval = EVAL_NULL;	556	PL_in_eval = EVAL_NULL;
		557	PL_comppad = 0;
500	PL_curpm = 0;	558	PL_curpm = 0;
501	PL_localizing = 0;	559	PL_localizing = 0;
502	PL_dirty = 0;	560	PL_dirty = 0;
503	PL_restartop = 0;	561	PL_restartop = 0;
504		562
…		…
512	Zero (&myop, 1, LOGOP);	570	Zero (&myop, 1, LOGOP);
513	myop.op_next = Nullop;	571	myop.op_next = Nullop;
514	myop.op_flags = OPf_WANT_VOID;	572	myop.op_flags = OPf_WANT_VOID;
515		573
516	PUSHMARK (SP);	574	PUSHMARK (SP);
517	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	575	XPUSHs (av_shift (GvAV (PL_defgv)));
518	PUTBACK;	576	PUTBACK;
519	PL_op = (OP *)&myop;	577	PL_op = (OP *)&myop;
520	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	578	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
521	SPAGAIN;	579	SPAGAIN;
522	}	580	}
523		581
524	ENTER; /* necessary e.g. for dounwind */	582	ENTER; /* necessary e.g. for dounwind */
525	}	583	}
526		584
527	static void	585	static void
528	free_coro_mortal ()	586	free_coro_mortal (pTHX)
529	{	587	{
530	if (coro_mortal)	588	if (coro_mortal)
531	{	589	{
532	SvREFCNT_dec (coro_mortal);	590	SvREFCNT_dec (coro_mortal);
533	coro_mortal = 0;	591	coro_mortal = 0;
534	}	592	}
535	}	593	}
536		594
537	/* inject a fake call to Coro::State::_cctx_init into the execution */	595	/* inject a fake call to Coro::State::_cctx_init into the execution */
		596	/* _cctx_init should be careful, as it could be called at almost any time */
		597	/* during execution of a perl program */
538	static void NOINLINE	598	static void NOINLINE
539	prepare_cctx (coro_cctx *cctx)	599	prepare_cctx (pTHX_ coro_cctx *cctx)
540	{	600	{
541	dSP;	601	dSP;
542	LOGOP myop;	602	LOGOP myop;
543		603
544	Zero (&myop, 1, LOGOP);	604	Zero (&myop, 1, LOGOP);
…		…
553	PL_op = (OP *)&myop;	613	PL_op = (OP *)&myop;
554	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	614	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
555	SPAGAIN;	615	SPAGAIN;
556	}	616	}
557		617
		618	/*
		619	* this is a _very_ stripped down perl interpreter ;)
		620	*/
558	static void	621	static void
559	coro_run (void *arg)	622	coro_run (void *arg)
560	{	623	{
		624	dTHX;
		625
561	/* coro_run is the alternative tail of transfer(), so unlock here. */	626	/* coro_run is the alternative tail of transfer(), so unlock here. */
562	UNLOCK;	627	UNLOCK;
563		628
564	/*
565	* this is a _very_ stripped down perl interpreter ;)
566	*/
567	PL_top_env = &PL_start_env;	629	PL_top_env = &PL_start_env;
568		630
569	/* inject call to cctx_init */	631	/* inject a fake subroutine call to cctx_init */
570	prepare_cctx ((coro_cctx *)arg);	632	prepare_cctx (aTHX_ (coro_cctx *)arg);
571		633
572	/* somebody will hit me for both perl_run and PL_restartop */	634	/* somebody or something will hit me for both perl_run and PL_restartop */
573	PL_restartop = PL_op;	635	PL_restartop = PL_op;
574	perl_run (PL_curinterp);	636	perl_run (PL_curinterp);
575		637
576	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	638	/*
577	abort ();	639	* If perl-run returns we assume exit() was being called or the coro
		640	* fell off the end, which seems to be the only valid (non-bug)
		641	* reason for perl_run to return. We try to exit by jumping to the
		642	* bootstrap-time "top" top_env, as we cannot restore the "main"
		643	* coroutine as Coro has no such concept
		644	*/
		645	PL_top_env = main_top_env;
		646	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
578	}	647	}
579		648
580	static coro_cctx *	649	static coro_cctx *
581	cctx_new ()	650	cctx_new ()
582	{	651	{
583	coro_cctx *cctx;	652	coro_cctx *cctx;
		653	void *stack_start;
		654	size_t stack_size;
584		655
585	++cctx_count;	656	++cctx_count;
586		657
587	New (0, cctx, 1, coro_cctx);	658	Newz (0, cctx, 1, coro_cctx);
588		659
589	#if HAVE_MMAP	660	#if HAVE_MMAP
590		661
591	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	662	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
592	/* mmap supposedly does allocate-on-write for us */	663	/* mmap supposedly does allocate-on-write for us */
593	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	664	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
594		665
595	if (cctx->sptr == (void *)-1)	666	if (cctx->sptr != (void *)-1)
596	{
597	perror ("FATAL: unable to mmap stack for coroutine");
598	_exit (EXIT_FAILURE);
599	}	667	{
600
601	# if STACKGUARD	668	# if CORO_STACKGUARD
602	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	669	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
603	# endif	670	# endif
		671	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		672	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		673	cctx->mapped = 1;
		674	}
		675	else
		676	#endif
		677	{
		678	cctx->ssize = coro_stacksize * (long)sizeof (long);
		679	New (0, cctx->sptr, coro_stacksize, long);
604		680
605	#else
606
607	cctx->ssize = STACKSIZE * (long)sizeof (long);
608	New (0, cctx->sptr, STACKSIZE, long);
609
610	if (!cctx->sptr)	681	if (!cctx->sptr)
611	{	682	{
612	perror ("FATAL: unable to malloc stack for coroutine");	683	perror ("FATAL: unable to allocate stack for coroutine");
613	_exit (EXIT_FAILURE);	684	_exit (EXIT_FAILURE);
614	}	685	}
615		686
616	#endif	687	stack_start = cctx->sptr;
		688	stack_size = cctx->ssize;
		689	}
617		690
618	#if USE_VALGRIND	691	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
619	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
620	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
621	cctx->ssize + (char *)cctx->sptr
622	);
623	#endif
624
625	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	692	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
626		693
627	return cctx;	694	return cctx;
628	}	695	}
629		696
630	static void	697	static void
…		…
633	if (!cctx)	700	if (!cctx)
634	return;	701	return;
635		702
636	--cctx_count;	703	--cctx_count;
637		704
638	#if USE_VALGRIND	705	#if CORO_USE_VALGRIND
639	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	706	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
640	#endif	707	#endif
641		708
642	#if HAVE_MMAP	709	#if HAVE_MMAP
		710	if (cctx->mapped)
643	munmap (cctx->sptr, cctx->ssize);	711	munmap (cctx->sptr, cctx->ssize);
644	#else	712	else
		713	#endif
645	Safefree (cctx->sptr);	714	Safefree (cctx->sptr);
646	#endif
647		715
648	Safefree (cctx);	716	Safefree (cctx);
649	}	717	}
650		718
651	static coro_cctx *	719	static coro_cctx *
652	cctx_get ()	720	cctx_get (pTHX)
653	{	721	{
654	coro_cctx *cctx;
655
656	if (cctx_first)	722	while (cctx_first)
657	{	723	{
658	cctx = cctx_first;	724	coro_cctx *cctx = cctx_first;
659	cctx_first = cctx->next;	725	cctx_first = cctx->next;
660	--cctx_idle;	726	--cctx_idle;
		727
		728	if (cctx->ssize >= coro_stacksize)
		729	return cctx;
		730
		731	cctx_destroy (cctx);
661	}	732	}
662	else	733
663	{
664	cctx = cctx_new ();
665	PL_op = PL_op->op_next;	734	PL_op = PL_op->op_next;
666	}
667
668	return cctx;	735	return cctx_new ();
669	}	736	}
670		737
671	static void	738	static void
672	cctx_put (coro_cctx *cctx)	739	cctx_put (coro_cctx *cctx)
673	{	740	{
…		…
685	++cctx_idle;	752	++cctx_idle;
686	cctx->next = cctx_first;	753	cctx->next = cctx_first;
687	cctx_first = cctx;	754	cctx_first = cctx;
688	}	755	}
689		756
		757	/ coroutine switching ***************************************************/
		758
690	/* never call directly, always through the coro_state_transfer global variable */	759	/* never call directly, always through the coro_state_transfer global variable */
691	static void NOINLINE	760	static void NOINLINE
692	transfer (struct coro prev, struct coro next)	761	transfer (pTHX_ struct coro prev, struct coro next)
693	{	762	{
694	dSTACKLEVEL;	763	dSTACKLEVEL;
695		764
696	/* sometimes transfer is only called to set idle_sp */	765	/* sometimes transfer is only called to set idle_sp */
697	if (!next)	766	if (!next)
		767	{
698	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	768	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		769	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		770	}
699	else if (prev != next)	771	else if (prev != next)
700	{	772	{
701	coro_cctx *prev__cctx;	773	coro_cctx *prev__cctx;
702		774
703	if (prev->flags & CF_NEW)	775	if (prev->flags & CF_NEW)
…		…
714	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");	786	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
715		787
716	if (next->flags & CF_RUNNING)	788	if (next->flags & CF_RUNNING)
717	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	789	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
718		790
		791	if (next->flags & CF_DESTROYED)
		792	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		793
719	prev->flags &= ~CF_RUNNING;	794	prev->flags &= ~CF_RUNNING;
720	next->flags \|= CF_RUNNING;	795	next->flags \|= CF_RUNNING;
721		796
722	LOCK;	797	LOCK;
723		798
724	if (next->flags & CF_NEW)	799	if (next->flags & CF_NEW)
725	{	800	{
726	/* need to start coroutine */	801	/* need to start coroutine */
727	next->flags &= ~CF_NEW;	802	next->flags &= ~CF_NEW;
728	/* first get rid of the old state */	803	/* first get rid of the old state */
729	save_perl (prev);	804	save_perl (aTHX_ prev);
730	/* setup coroutine call */	805	/* setup coroutine call */
731	setup_coro (next);	806	setup_coro (aTHX_ next);
732	/* need a new stack */	807	/* need a new stack */
733	assert (!next->stack);	808	assert (!next->cctx);
734	}	809	}
735	else	810	else
736	{	811	{
737	/* coroutine already started */	812	/* coroutine already started */
738	save_perl (prev);	813	save_perl (aTHX_ prev);
739	load_perl (next);	814	load_perl (aTHX_ next);
740	}	815	}
741		816
742	prev__cctx = prev->cctx;	817	prev__cctx = prev->cctx;
743		818
744	/* possibly "free" the cctx */	819	/* possibly "free" the cctx */
745	if (prev__cctx->idle_sp == STACKLEVEL)	820	if (prev__cctx->idle_sp == STACKLEVEL)
746	{	821	{
747	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	822	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
748	assert (PL_top_env == prev__cctx->top_env);	823	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
749		824
750	prev->cctx = 0;	825	prev->cctx = 0;
751		826
752	cctx_put (prev__cctx);	827	cctx_put (prev__cctx);
753	prev__cctx->inuse = 0;	828	prev__cctx->inuse = 0;
754	}	829	}
755		830
756	if (!next->cctx)	831	if (!next->cctx)
757	{	832	{
758	next->cctx = cctx_get ();	833	next->cctx = cctx_get (aTHX);
759	assert (!next->cctx->inuse);	834	assert (!next->cctx->inuse);
760	next->cctx->inuse = 1;	835	next->cctx->inuse = 1;
761	}	836	}
762		837
763	if (prev__cctx != next->cctx)	838	if (prev__cctx != next->cctx)
…		…
765	prev__cctx->top_env = PL_top_env;	840	prev__cctx->top_env = PL_top_env;
766	PL_top_env = next->cctx->top_env;	841	PL_top_env = next->cctx->top_env;
767	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	842	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
768	}	843	}
769		844
770	free_coro_mortal ();	845	free_coro_mortal (aTHX);
771
772	UNLOCK;	846	UNLOCK;
773	}	847	}
774	}	848	}
775		849
776	struct transfer_args	850	struct transfer_args
777	{	851	{
778	struct coro prev, next;	852	struct coro prev, next;
779	};	853	};
780		854
781	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	855	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
782		856
		857	/ high level stuff ******************************************************/
		858
783	static void	859	static int
784	coro_state_destroy (struct coro *coro)	860	coro_state_destroy (pTHX_ struct coro *coro)
785	{	861	{
786	if (coro->refcnt--)	862	if (coro->flags & CF_DESTROYED)
787	return;	863	return 0;
		864
		865	coro->flags \|= CF_DESTROYED;
		866
		867	if (coro->flags & CF_READY)
		868	{
		869	/* reduce nready, as destroying a ready coro effectively unreadies it */
		870	/* alternative: look through all ready queues and remove the coro */
		871	LOCK;
		872	--coro_nready;
		873	UNLOCK;
		874	}
		875	else
		876	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
788		877
789	if (coro->mainstack && coro->mainstack != main_mainstack)	878	if (coro->mainstack && coro->mainstack != main_mainstack)
790	{	879	{
791	struct coro temp;	880	struct coro temp;
		881
		882	assert (!(coro->flags & CF_RUNNING));
		883
792	Zero (&temp, 1, struct coro);	884	Zero (&temp, 1, struct coro);
793	temp.save = CORO_SAVE_ALL;	885	temp.save = CORO_SAVE_ALL;
794		886
795	if (coro->flags & CF_RUNNING)	887	if (coro->flags & CF_RUNNING)
796	croak ("FATAL: tried to destroy currently running coroutine");	888	croak ("FATAL: tried to destroy currently running coroutine");
797		889
798	save_perl (&temp);	890	save_perl (aTHX_ &temp);
799	load_perl (coro);	891	load_perl (aTHX_ coro);
800		892
801	coro_destroy_stacks ();	893	coro_destroy_stacks (aTHX);
802		894
803	load_perl (&temp); /* this will get rid of defsv etc.. */	895	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
804		896
805	coro->mainstack = 0;	897	coro->mainstack = 0;
806	}	898	}
807		899
808	cctx_destroy (coro->cctx);	900	cctx_destroy (coro->cctx);
809	SvREFCNT_dec (coro->args);	901	SvREFCNT_dec (coro->args);
810	Safefree (coro);	902
		903	if (coro->next) coro->next->prev = coro->prev;
		904	if (coro->prev) coro->prev->next = coro->next;
		905	if (coro == first) first = coro->next;
		906
		907	return 1;
811	}	908	}
812		909
813	static int	910	static int
814	coro_state_clear (pTHX_ SV sv, MAGIC mg)	911	coro_state_free (pTHX_ SV sv, MAGIC mg)
815	{	912	{
816	struct coro coro = (struct coro )mg->mg_ptr;	913	struct coro coro = (struct coro )mg->mg_ptr;
817	mg->mg_ptr = 0;	914	mg->mg_ptr = 0;
818		915
		916	coro->hv = 0;
		917
		918	if (--coro->refcnt < 0)
		919	{
819	coro_state_destroy (coro);	920	coro_state_destroy (aTHX_ coro);
		921	Safefree (coro);
		922	}
820		923
821	return 0;	924	return 0;
822	}	925	}
823		926
824	static int	927	static int
…		…
831	return 0;	934	return 0;
832	}	935	}
833		936
834	static MGVTBL coro_state_vtbl = {	937	static MGVTBL coro_state_vtbl = {
835	0, 0, 0, 0,	938	0, 0, 0, 0,
836	coro_state_clear,	939	coro_state_free,
837	0,	940	0,
838	#ifdef MGf_DUP	941	#ifdef MGf_DUP
839	coro_state_dup,	942	coro_state_dup,
840	#else	943	#else
841	# define MGf_DUP 0	944	# define MGf_DUP 0
842	#endif	945	#endif
843	};	946	};
844		947
845	static struct coro *	948	static struct coro *
846	SvSTATE (SV *coro)	949	SvSTATE_ (pTHX_ SV *coro)
847	{	950	{
848	HV *stash;	951	HV *stash;
849	MAGIC *mg;	952	MAGIC *mg;
850		953
851	if (SvROK (coro))	954	if (SvROK (coro))
…		…
857	/* very slow, but rare, check */	960	/* very slow, but rare, check */
858	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	961	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
859	croak ("Coro::State object required");	962	croak ("Coro::State object required");
860	}	963	}
861		964
862	mg = SvMAGIC (coro);	965	mg = CORO_MAGIC (coro);
863	assert (mg->mg_type == PERL_MAGIC_ext);
864	return (struct coro *)mg->mg_ptr;	966	return (struct coro *)mg->mg_ptr;
865	}	967	}
866		968
		969	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		970
867	static void	971	static void
868	prepare_transfer (struct transfer_args ta, SV prev_sv, SV *next_sv)	972	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
869	{	973	{
870	ta->prev = SvSTATE (prev_sv);	974	ta->prev = SvSTATE (prev_sv);
871	ta->next = SvSTATE (next_sv);	975	ta->next = SvSTATE (next_sv);
872	}	976	}
873		977
874	static void	978	static void
875	api_transfer (SV prev_sv, SV next_sv)	979	api_transfer (SV prev_sv, SV next_sv)
876	{	980	{
		981	dTHX;
877	struct transfer_args ta;	982	struct transfer_args ta;
878		983
879	prepare_transfer (&ta, prev_sv, next_sv);	984	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
880	TRANSFER (ta);	985	TRANSFER (ta);
881	}	986	}
882		987
883	static int	988	static int
884	api_save (SV *coro_sv, int new_save)	989	api_save (SV *coro_sv, int new_save)
885	{	990	{
		991	dTHX;
886	struct coro *coro = SvSTATE (coro_sv);	992	struct coro *coro = SvSTATE (coro_sv);
887	int old_save = coro->save;	993	int old_save = coro->save;
888		994
889	if (new_save >= 0)	995	if (new_save >= 0)
890	coro->save = new_save;	996	coro->save = new_save;
…		…
892	return old_save;	998	return old_save;
893	}	999	}
894		1000
895	/ Coro ******************************************************************/	1001	/ Coro ******************************************************************/
896		1002
897	#define PRIO_MAX 3
898	#define PRIO_HIGH 1
899	#define PRIO_NORMAL 0
900	#define PRIO_LOW -1
901	#define PRIO_IDLE -3
902	#define PRIO_MIN -4
903
904	/* for Coro.pm */
905	static SV *coro_current;
906	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
907	static int coro_nready;
908
909	static void	1003	static void
910	coro_enq (SV *coro_sv)	1004	coro_enq (pTHX_ SV *coro_sv)
911	{	1005	{
912	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1006	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
913	coro_nready++;
914	}	1007	}
915		1008
916	static SV *	1009	static SV *
917	coro_deq (int min_prio)	1010	coro_deq (pTHX_ int min_prio)
918	{	1011	{
919	int prio = PRIO_MAX - PRIO_MIN;	1012	int prio = PRIO_MAX - PRIO_MIN;
920		1013
921	min_prio -= PRIO_MIN;	1014	min_prio -= PRIO_MIN;
922	if (min_prio < 0)	1015	if (min_prio < 0)
923	min_prio = 0;	1016	min_prio = 0;
924		1017
925	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1018	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
926	if (AvFILLp (coro_ready [prio]) >= 0)	1019	if (AvFILLp (coro_ready [prio]) >= 0)
927	{
928	coro_nready--;
929	return av_shift (coro_ready [prio]);	1020	return av_shift (coro_ready [prio]);
930	}
931		1021
932	return 0;	1022	return 0;
933	}	1023	}
934		1024
935	static int	1025	static int
936	api_ready (SV *coro_sv)	1026	api_ready (SV *coro_sv)
937	{	1027	{
		1028	dTHX;
938	struct coro *coro;	1029	struct coro *coro;
939		1030
940	if (SvROK (coro_sv))	1031	if (SvROK (coro_sv))
941	coro_sv = SvRV (coro_sv);	1032	coro_sv = SvRV (coro_sv);
942		1033
943	coro = SvSTATE (coro_sv);	1034	coro = SvSTATE (coro_sv);
944		1035
945	if (coro->flags & CF_READY)	1036	if (coro->flags & CF_READY)
946	return 0;	1037	return 0;
947		1038
948	#if 0 /* this is actually harmless */
949	if (coro->flags & CF_RUNNING)
950	croak ("Coro::ready called on currently running coroutine");
951	#endif
952
953	coro->flags \|= CF_READY;	1039	coro->flags \|= CF_READY;
954		1040
955	LOCK;	1041	LOCK;
956	coro_enq (SvREFCNT_inc (coro_sv));	1042	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1043	++coro_nready;
957	UNLOCK;	1044	UNLOCK;
958		1045
959	return 1;	1046	return 1;
960	}	1047	}
961		1048
962	static int	1049	static int
963	api_is_ready (SV *coro_sv)	1050	api_is_ready (SV *coro_sv)
964	{	1051	{
		1052	dTHX;
965	return !!SvSTATE (coro_sv)->flags & CF_READY;	1053	return !!(SvSTATE (coro_sv)->flags & CF_READY);
966	}	1054	}
967		1055
968	static void	1056	static void
969	prepare_schedule (struct transfer_args *ta)	1057	prepare_schedule (pTHX_ struct transfer_args *ta)
970	{	1058	{
971	SV prev, next;	1059	SV prev_sv, next_sv;
972		1060
973	for (;;)	1061	for (;;)
974	{	1062	{
975	LOCK;	1063	LOCK;
976	next = coro_deq (PRIO_MIN);	1064	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1065
		1066	/* nothing to schedule: call the idle handler */
		1067	if (!next_sv)
		1068	{
		1069	dSP;
		1070	UNLOCK;
		1071
		1072	ENTER;
		1073	SAVETMPS;
		1074
		1075	PUSHMARK (SP);
		1076	PUTBACK;
		1077	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1078
		1079	FREETMPS;
		1080	LEAVE;
		1081	continue;
		1082	}
		1083
		1084	ta->next = SvSTATE (next_sv);
		1085
		1086	/* cannot transfer to destroyed coros, skip and look for next */
		1087	if (ta->next->flags & CF_DESTROYED)
		1088	{
		1089	UNLOCK;
		1090	SvREFCNT_dec (next_sv);
		1091	/* coro_nready is already taken care of by destroy */
		1092	continue;
		1093	}
		1094
		1095	--coro_nready;
977	UNLOCK;	1096	UNLOCK;
978
979	if (next)
980	break;	1097	break;
981
982	{
983	dSP;
984
985	ENTER;
986	SAVETMPS;
987
988	PUSHMARK (SP);
989	PUTBACK;
990	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
991
992	FREETMPS;
993	LEAVE;
994	}	1098	}
995	}
996
997	prev = SvRV (coro_current);
998	SvRV_set (coro_current, next);
999		1099
1000	/* free this only after the transfer */	1100	/* free this only after the transfer */
1001	LOCK;	1101	prev_sv = SvRV (coro_current);
1002	free_coro_mortal ();	1102	SvRV_set (coro_current, next_sv);
1003	UNLOCK;
1004	coro_mortal = prev;
1005
1006	assert (!SvROK(prev));//D
1007	assert (!SvROK(next));//D
1008
1009	ta->prev = SvSTATE (prev);	1103	ta->prev = SvSTATE (prev_sv);
1010	ta->next = SvSTATE (next);
1011		1104
1012	assert (ta->next->flags & CF_READY);	1105	assert (ta->next->flags & CF_READY);
1013	ta->next->flags &= ~CF_READY;	1106	ta->next->flags &= ~CF_READY;
1014	}
1015		1107
		1108	LOCK;
		1109	free_coro_mortal (aTHX);
		1110	coro_mortal = prev_sv;
		1111	UNLOCK;
		1112	}
		1113
1016	static void	1114	static void
1017	prepare_cede (struct transfer_args *ta)	1115	prepare_cede (pTHX_ struct transfer_args *ta)
1018	{	1116	{
1019	api_ready (coro_current);	1117	api_ready (coro_current);
1020
1021	prepare_schedule (ta);	1118	prepare_schedule (aTHX_ ta);
		1119	}
		1120
		1121	static int
		1122	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1123	{
		1124	if (coro_nready)
		1125	{
		1126	SV *prev = SvRV (coro_current);
		1127	prepare_schedule (aTHX_ ta);
		1128	api_ready (prev);
		1129	return 1;
		1130	}
		1131	else
		1132	return 0;
1022	}	1133	}
1023		1134
1024	static void	1135	static void
1025	api_schedule (void)	1136	api_schedule (void)
1026	{	1137	{
		1138	dTHX;
1027	struct transfer_args ta;	1139	struct transfer_args ta;
1028		1140
1029	prepare_schedule (&ta);	1141	prepare_schedule (aTHX_ &ta);
1030	TRANSFER (ta);	1142	TRANSFER (ta);
1031	}	1143	}
1032		1144
1033	static void	1145	static int
1034	api_cede (void)	1146	api_cede (void)
1035	{	1147	{
		1148	dTHX;
1036	struct transfer_args ta;	1149	struct transfer_args ta;
1037		1150
1038	prepare_cede (&ta);	1151	prepare_cede (aTHX_ &ta);
		1152
		1153	if (ta.prev != ta.next)
		1154	{
1039	TRANSFER (ta);	1155	TRANSFER (ta);
		1156	return 1;
		1157	}
		1158	else
		1159	return 0;
		1160	}
		1161
		1162	static int
		1163	api_cede_notself (void)
		1164	{
		1165	dTHX;
		1166	struct transfer_args ta;
		1167
		1168	if (prepare_cede_notself (aTHX_ &ta))
		1169	{
		1170	TRANSFER (ta);
		1171	return 1;
		1172	}
		1173	else
		1174	return 0;
1040	}	1175	}
1041		1176
1042	MODULE = Coro::State PACKAGE = Coro::State	1177	MODULE = Coro::State PACKAGE = Coro::State
1043		1178
1044	PROTOTYPES: DISABLE	1179	PROTOTYPES: DISABLE
…		…
1054		1189
1055	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1190	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1056	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));	1191	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1057	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));	1192	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1058	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));	1193	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1194	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1195	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
1059	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1196	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1060		1197
1061	main_mainstack = PL_mainstack;	1198	main_mainstack = PL_mainstack;
		1199	main_top_env = PL_top_env;
		1200
		1201	while (main_top_env->je_prev)
		1202	main_top_env = main_top_env->je_prev;
1062		1203
1063	coroapi.ver = CORO_API_VERSION;	1204	coroapi.ver = CORO_API_VERSION;
1064	coroapi.transfer = api_transfer;	1205	coroapi.transfer = api_transfer;
1065		1206
1066	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1207	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1074	HV *hv;	1215	HV *hv;
1075	int i;	1216	int i;
1076		1217
1077	Newz (0, coro, 1, struct coro);	1218	Newz (0, coro, 1, struct coro);
1078	coro->args = newAV ();	1219	coro->args = newAV ();
1079	coro->save = CORO_SAVE_ALL;	1220	coro->save = CORO_SAVE_DEF;
1080	coro->flags = CF_NEW;	1221	coro->flags = CF_NEW;
1081		1222
		1223	if (first) first->prev = coro;
		1224	coro->next = first;
		1225	first = coro;
		1226
1082	hv = newHV ();	1227	coro->hv = hv = newHV ();
1083	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1228	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
1084	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1229	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1085		1230
1086	for (i = 1; i < items; i++)	1231	for (i = 1; i < items; i++)
1087	av_push (coro->args, newSVsv (ST (i)));	1232	av_push (coro->args, newSVsv (ST (i)));
…		…
1094	CODE:	1239	CODE:
1095	RETVAL = api_save (coro, new_save);	1240	RETVAL = api_save (coro, new_save);
1096	OUTPUT:	1241	OUTPUT:
1097	RETVAL	1242	RETVAL
1098		1243
		1244	int
		1245	save_also (SV *coro_sv, int save_also)
		1246	CODE:
		1247	{
		1248	struct coro *coro = SvSTATE (coro_sv);
		1249	RETVAL = coro->save;
		1250	coro->save \|= save_also;
		1251	}
		1252	OUTPUT:
		1253	RETVAL
		1254
1099	void	1255	void
1100	_set_stacklevel (...)	1256	_set_stacklevel (...)
1101	ALIAS:	1257	ALIAS:
1102	Coro::State::transfer = 1	1258	Coro::State::transfer = 1
1103	Coro::schedule = 2	1259	Coro::schedule = 2
1104	Coro::cede = 3	1260	Coro::cede = 3
		1261	Coro::cede_notself = 4
1105	CODE:	1262	CODE:
1106	{	1263	{
1107	struct transfer_args ta;	1264	struct transfer_args ta;
1108		1265
1109	switch (ix)	1266	switch (ix)
…		…
1115		1272
1116	case 1:	1273	case 1:
1117	if (items != 2)	1274	if (items != 2)
1118	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1275	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1119		1276
1120	prepare_transfer (&ta, ST (0), ST (1));	1277	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1121	break;	1278	break;
1122		1279
1123	case 2:	1280	case 2:
1124	prepare_schedule (&ta);	1281	prepare_schedule (aTHX_ &ta);
1125	break;	1282	break;
1126		1283
1127	case 3:	1284	case 3:
1128	prepare_cede (&ta);	1285	prepare_cede (aTHX_ &ta);
		1286	break;
		1287
		1288	case 4:
		1289	if (!prepare_cede_notself (aTHX_ &ta))
		1290	XSRETURN_EMPTY;
		1291
1129	break;	1292	break;
1130	}	1293	}
1131		1294
		1295	BARRIER;
1132	TRANSFER (ta);	1296	TRANSFER (ta);
1133	}
1134		1297
1135	void	1298	if (GIMME_V != G_VOID && ta.next != ta.prev)
1136	_clone_state_from (SV dst, SV src)	1299	XSRETURN_YES;
		1300	}
		1301
		1302	bool
		1303	_destroy (SV *coro_sv)
1137	CODE:	1304	CODE:
1138	{	1305	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1139	struct coro *coro_src = SvSTATE (src);	1306	OUTPUT:
1140		1307	RETVAL
1141	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1142
1143	++coro_src->refcnt;
1144	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1145	}
1146		1308
1147	void	1309	void
1148	_exit (code)	1310	_exit (code)
1149	int code	1311	int code
1150	PROTOTYPE: $	1312	PROTOTYPE: $
1151	CODE:	1313	CODE:
1152	_exit (code);	1314	_exit (code);
1153		1315
1154	int	1316	int
		1317	cctx_stacksize (int new_stacksize = 0)
		1318	CODE:
		1319	RETVAL = coro_stacksize;
		1320	if (new_stacksize)
		1321	coro_stacksize = new_stacksize;
		1322	OUTPUT:
		1323	RETVAL
		1324
		1325	int
1155	cctx_count ()	1326	cctx_count ()
1156	CODE:	1327	CODE:
1157	RETVAL = cctx_count;	1328	RETVAL = cctx_count;
1158	OUTPUT:	1329	OUTPUT:
1159	RETVAL	1330	RETVAL
…		…
1163	CODE:	1334	CODE:
1164	RETVAL = cctx_idle;	1335	RETVAL = cctx_idle;
1165	OUTPUT:	1336	OUTPUT:
1166	RETVAL	1337	RETVAL
1167		1338
		1339	void
		1340	list ()
		1341	PPCODE:
		1342	{
		1343	struct coro *coro;
		1344	for (coro = first; coro; coro = coro->next)
		1345	if (coro->hv)
		1346	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1347	}
		1348
		1349	void
		1350	_eval (SV coro_sv, SV coderef)
		1351	CODE:
		1352	{
		1353	struct coro *coro = SvSTATE (coro_sv);
		1354	if (coro->mainstack)
		1355	{
		1356	struct coro temp;
		1357	Zero (&temp, 1, struct coro);
		1358	temp.save = CORO_SAVE_ALL;
		1359
		1360	if (!(coro->flags & CF_RUNNING))
		1361	{
		1362	save_perl (aTHX_ &temp);
		1363	load_perl (aTHX_ coro);
		1364	}
		1365
		1366	{
		1367	dSP;
		1368	ENTER;
		1369	SAVETMPS;
		1370	PUSHMARK (SP);
		1371	PUTBACK;
		1372	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1373	SPAGAIN;
		1374	FREETMPS;
		1375	LEAVE;
		1376	PUTBACK;
		1377	}
		1378
		1379	if (!(coro->flags & CF_RUNNING))
		1380	{
		1381	save_perl (aTHX_ coro);
		1382	load_perl (aTHX_ &temp);
		1383	}
		1384	}
		1385	}
		1386
		1387	SV *
		1388	is_ready (SV *coro_sv)
		1389	PROTOTYPE: $
		1390	ALIAS:
		1391	is_ready = CF_READY
		1392	is_running = CF_RUNNING
		1393	is_new = CF_NEW
		1394	is_destroyed = CF_DESTROYED
		1395	CODE:
		1396	struct coro *coro = SvSTATE (coro_sv);
		1397	RETVAL = boolSV (coro->flags & ix);
		1398	OUTPUT:
		1399	RETVAL
		1400
		1401
1168	MODULE = Coro::State PACKAGE = Coro	1402	MODULE = Coro::State PACKAGE = Coro
1169		1403
1170	BOOT:	1404	BOOT:
1171	{	1405	{
1172	int i;	1406	int i;
…		…
1187	coro_ready[i] = newAV ();	1421	coro_ready[i] = newAV ();
1188		1422
1189	{	1423	{
1190	SV *sv = perl_get_sv("Coro::API", 1);	1424	SV *sv = perl_get_sv("Coro::API", 1);
1191		1425
1192	coroapi.schedule = api_schedule;	1426	coroapi.schedule = api_schedule;
1193	coroapi.save = api_save;	1427	coroapi.save = api_save;
1194	coroapi.cede = api_cede;	1428	coroapi.cede = api_cede;
		1429	coroapi.cede_notself = api_cede_notself;
1195	coroapi.ready = api_ready;	1430	coroapi.ready = api_ready;
1196	coroapi.is_ready = api_is_ready;	1431	coroapi.is_ready = api_is_ready;
1197	coroapi.nready = &coro_nready;	1432	coroapi.nready = &coro_nready;
1198	coroapi.current = coro_current;	1433	coroapi.current = coro_current;
1199		1434
1200	GCoroAPI = &coroapi;	1435	GCoroAPI = &coroapi;
1201	sv_setiv (sv, (IV)&coroapi);	1436	sv_setiv (sv, (IV)&coroapi);
1202	SvREADONLY_on (sv);	1437	SvREADONLY_on (sv);
1203	}	1438	}
…		…
1219	RETVAL = coro->prio;	1454	RETVAL = coro->prio;
1220		1455
1221	if (items > 1)	1456	if (items > 1)
1222	{	1457	{
1223	if (ix)	1458	if (ix)
1224	newprio += coro->prio;	1459	newprio = coro->prio - newprio;
1225		1460
1226	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1461	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1227	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1462	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1228		1463
1229	coro->prio = newprio;	1464	coro->prio = newprio;
1230	}	1465	}
1231	}	1466	}
		1467	OUTPUT:
		1468	RETVAL
1232		1469
1233	SV *	1470	SV *
1234	ready (SV *self)	1471	ready (SV *self)
1235	PROTOTYPE: $	1472	PROTOTYPE: $
1236	CODE:	1473	CODE:
1237	RETVAL = boolSV (api_ready (self));	1474	RETVAL = boolSV (api_ready (self));
1238	OUTPUT:	1475	OUTPUT:
1239	RETVAL	1476	RETVAL
1240		1477
1241	SV *
1242	is_ready (SV *self)
1243	PROTOTYPE: $
1244	CODE:
1245	RETVAL = boolSV (api_is_ready (self));
1246	OUTPUT:
1247	RETVAL
1248
1249	int	1478	int
1250	nready (...)	1479	nready (...)
1251	PROTOTYPE:	1480	PROTOTYPE:
1252	CODE:	1481	CODE:
1253	RETVAL = coro_nready;	1482	RETVAL = coro_nready;

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Comparing Coro/Coro/State.xs (file contents): Revision 1.122 by root, Mon Dec 4 13:47:56 2006 UTC vs. Revision 1.151 by root, Wed Sep 19 21:39:15 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.122 by root, Mon Dec 4 13:47:56 2006 UTC vs.
Revision 1.151 by root, Wed Sep 19 21:39:15 2007 UTC