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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.117 by root, Fri Dec 1 19:41:06 2006 UTC vs.
Revision 1.146 by root, Sat Mar 17 19:51:57 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"
94
95	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
96		112
97	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
98	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
99	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
100	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
101	#else	117	#else
102	# define LOCK (void)0	118	# define LOCK (void)0
103	# define UNLOCK (void)0	119	# define UNLOCK (void)0
104	#endif	120	#endif
105		121
		122	/* helper storage struct for Coro::AIO */
		123	struct io_state
		124	{
		125	int errorno;
		126	I32 laststype;
		127	int laststatval;
		128	Stat_t statcache;
		129	};
		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
106	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
107	static AV *main_mainstack; /* used to differentiate between $main and others */	133	static AV *main_mainstack; /* used to differentiate between $main and others */
108	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
109	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
110		136
…		…
115	typedef struct coro_cctx {	141	typedef struct coro_cctx {
116	struct coro_cctx *next;	142	struct coro_cctx *next;
117		143
118	/* the stack */	144	/* the stack */
119	void *sptr;	145	void *sptr;
120	long ssize; /* positive == mmap, otherwise malloc */	146	size_t ssize;
121		147
122	/* cpu state */	148	/* cpu state */
123	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	149	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		150	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
124	JMPENV *top_env;	151	JMPENV *top_env;
125	coro_context cctx;	152	coro_context cctx;
126		153
127	int inuse;
128
129	#if USE_VALGRIND	154	#if CORO_USE_VALGRIND
130	int valgrind_id;	155	int valgrind_id;
131	#endif	156	#endif
		157	char inuse, mapped;
132	} coro_cctx;	158	} coro_cctx;
133		159
134	enum {	160	enum {
135	CF_RUNNING = 0x0001, /* coroutine is running */	161	CF_RUNNING = 0x0001, /* coroutine is running */
136	CF_READY = 0x0002, /* coroutine is ready */	162	CF_READY = 0x0002, /* coroutine is ready */
137	CF_NEW = 0x0004, /* ahs never been switched to */	163	CF_NEW = 0x0004, /* has never been switched to */
		164	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
138	};	165	};
139		166
140	/* this is a structure representing a perl-level coroutine */	167	/* this is a structure representing a perl-level coroutine */
141	struct coro {	168	struct coro {
142	/* the c coroutine allocated to this perl coroutine, if any */	169	/* the c coroutine allocated to this perl coroutine, if any */
143	coro_cctx *cctx;	170	coro_cctx *cctx;
144		171
145	/* data associated with this coroutine (initial args) */	172	/* data associated with this coroutine (initial args) */
146	AV *args;	173	AV *args;
147	int refcnt;	174	int refcnt;
148	int flags;	175	int save; /* CORO_SAVE flags */
		176	int flags; /* CF_ flags */
149		177
150	/* optionally saved, might be zero */	178	/* optionally saved, might be zero */
151	AV *defav;	179	AV *defav; /* @_ */
152	SV *defsv;	180	SV *defsv; /* $_ */
153	SV *errsv;	181	SV *errsv; /* $@ */
		182	SV *irssv; /* $/ */
		183	SV *irssv_sv; /* real $/ cache */
154		184
155	#define VAR(name,type) type name;	185	#define VAR(name,type) type name;
156	# include "state.h"	186	# include "state.h"
157	#undef VAR	187	#undef VAR
158		188
…		…
161	};	191	};
162		192
163	typedef struct coro *Coro__State;	193	typedef struct coro *Coro__State;
164	typedef struct coro *Coro__State_or_hashref;	194	typedef struct coro *Coro__State_or_hashref;
165		195
		196	/** Coro ********************************************************************/
		197
		198	#define PRIO_MAX 3
		199	#define PRIO_HIGH 1
		200	#define PRIO_NORMAL 0
		201	#define PRIO_LOW -1
		202	#define PRIO_IDLE -3
		203	#define PRIO_MIN -4
		204
		205	/* for Coro.pm */
		206	static SV *coro_current;
		207	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		208	static int coro_nready;
		209
		210	/** lowlevel stuff **********************************************************/
		211
166	static AV *	212	static AV *
167	coro_clone_padlist (CV *cv)	213	coro_clone_padlist (pTHX_ CV *cv)
168	{	214	{
169	AV *padlist = CvPADLIST (cv);	215	AV *padlist = CvPADLIST (cv);
170	AV *newpadlist, *newpad;	216	AV *newpadlist, *newpad;
171		217
172	newpadlist = newAV ();	218	newpadlist = newAV ();
…		…
184		230
185	return newpadlist;	231	return newpadlist;
186	}	232	}
187		233
188	static void	234	static void
189	free_padlist (AV *padlist)	235	free_padlist (pTHX_ AV *padlist)
190	{	236	{
191	/* may be during global destruction */	237	/* may be during global destruction */
192	if (SvREFCNT (padlist))	238	if (SvREFCNT (padlist))
193	{	239	{
194	I32 i = AvFILLp (padlist);	240	I32 i = AvFILLp (padlist);
…		…
215	AV *padlist;	261	AV *padlist;
216	AV *av = (AV *)mg->mg_obj;	262	AV *av = (AV *)mg->mg_obj;
217		263
218	/* casting is fun. */	264	/* casting is fun. */
219	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	265	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
220	free_padlist (padlist);	266	free_padlist (aTHX_ padlist);
221		267
222	SvREFCNT_dec (av);	268	SvREFCNT_dec (av);
223		269
224	return 0;	270	return 0;
225	}	271	}
…		…
235	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	281	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
236	: 0	282	: 0
237		283
238	/* the next two functions merely cache the padlists */	284	/* the next two functions merely cache the padlists */
239	static void	285	static void
240	get_padlist (CV *cv)	286	get_padlist (pTHX_ CV *cv)
241	{	287	{
242	MAGIC *mg = CORO_MAGIC (cv);	288	MAGIC *mg = CORO_MAGIC (cv);
243	AV *av;	289	AV *av;
244		290
245	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	291	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
246	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	292	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
247	else	293	else
248	{	294	{
249	#if 0	295	#if CORO_PREFER_PERL_FUNCTIONS
250	/* this is probably cleaner, but also slower? */	296	/* this is probably cleaner, but also slower? */
251	CV *cp = Perl_cv_clone (cv);	297	CV *cp = Perl_cv_clone (cv);
252	CvPADLIST (cv) = CvPADLIST (cp);	298	CvPADLIST (cv) = CvPADLIST (cp);
253	CvPADLIST (cp) = 0;	299	CvPADLIST (cp) = 0;
254	SvREFCNT_dec (cp);	300	SvREFCNT_dec (cp);
255	#else	301	#else
256	CvPADLIST (cv) = coro_clone_padlist (cv);	302	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
257	#endif	303	#endif
258	}	304	}
259	}	305	}
260		306
261	static void	307	static void
262	put_padlist (CV *cv)	308	put_padlist (pTHX_ CV *cv)
263	{	309	{
264	MAGIC *mg = CORO_MAGIC (cv);	310	MAGIC *mg = CORO_MAGIC (cv);
265	AV *av;	311	AV *av;
266		312
267	if (!mg)	313	if (!mg)
…		…
278	av_extend (av, AvMAX (av) + 1);	324	av_extend (av, AvMAX (av) + 1);
279		325
280	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	326	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
281	}	327	}
282		328
		329	/** load & save, init *******************************************************/
		330
283	#define SB do {	331	#define SB do {
284	#define SE } while (0)	332	#define SE } while (0)
285		333
286	#define LOAD(state) load_state ((state))
287	#define SAVE(state,flags) save_state ((state),(flags))
288
289	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE	334	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
290		335
291	static void	336	static void
292	load_state (Coro__State c)	337	load_perl (pTHX_ Coro__State c)
293	{	338	{
294	#define VAR(name,type) PL_ ## name = c->name;	339	#define VAR(name,type) PL_ ## name = c->name;
295	# include "state.h"	340	# include "state.h"
296	#undef VAR	341	#undef VAR
297		342
298	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	343	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
299	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	344	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
300	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	345	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		346	if (c->irssv)
		347	{
		348	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		349	SvREFCNT_dec (c->irssv);
		350	else
		351	{
		352	REPLACE_SV (PL_rs, c->irssv);
		353	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		354	sv_setsv (c->irssv_sv, PL_rs);
		355	}
		356	}
301		357
302	{	358	{
303	dSP;	359	dSP;
304	CV *cv;	360	CV *cv;
305		361
306	/* now do the ugly restore mess */	362	/* now do the ugly restore mess */
307	while ((cv = (CV *)POPs))	363	while ((cv = (CV *)POPs))
308	{	364	{
309	put_padlist (cv); /* mark this padlist as available */	365	put_padlist (aTHX_ cv); /* mark this padlist as available */
310	CvDEPTH (cv) = PTR2IV (POPs);	366	CvDEPTH (cv) = PTR2IV (POPs);
311	CvPADLIST (cv) = (AV *)POPs;	367	CvPADLIST (cv) = (AV *)POPs;
312	}	368	}
313		369
314	PUTBACK;	370	PUTBACK;
315	}	371	}
		372	assert (!PL_comppad || AvARRAY (PL_comppad));//D
316	}	373	}
317		374
318	static void	375	static void
319	save_state (Coro__State c, int flags)	376	save_perl (pTHX_ Coro__State c)
320	{	377	{
		378	assert (!PL_comppad || AvARRAY (PL_comppad));//D
321	{	379	{
322	dSP;	380	dSP;
323	I32 cxix = cxstack_ix;	381	I32 cxix = cxstack_ix;
324	PERL_CONTEXT *ccstk = cxstack;	382	PERL_CONTEXT *ccstk = cxstack;
325	PERL_SI *top_si = PL_curstackinfo;	383	PERL_SI *top_si = PL_curstackinfo;
…		…
327	/*	385	/*
328	* the worst thing you can imagine happens first - we have to save	386	* the worst thing you can imagine happens first - we have to save
329	* (and reinitialize) all cv's in the whole callchain :(	387	* (and reinitialize) all cv's in the whole callchain :(
330	*/	388	*/
331		389
		390	EXTEND (SP, 3 + 1);
332	PUSHs (Nullsv);	391	PUSHs (Nullsv);
333	/* this loop was inspired by pp_caller */	392	/* this loop was inspired by pp_caller */
334	for (;;)	393	for (;;)
335	{	394	{
336	while (cxix >= 0)	395	while (cxix >= 0)
…		…
342	CV *cv = cx->blk_sub.cv;	401	CV *cv = cx->blk_sub.cv;
343		402
344	if (CvDEPTH (cv))	403	if (CvDEPTH (cv))
345	{	404	{
346	EXTEND (SP, 3);	405	EXTEND (SP, 3);
347
348	PUSHs ((SV *)CvPADLIST (cv));	406	PUSHs ((SV *)CvPADLIST (cv));
349	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	407	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
350	PUSHs ((SV *)cv);	408	PUSHs ((SV *)cv);
351		409
352	CvDEPTH (cv) = 0;	410	CvDEPTH (cv) = 0;
353	get_padlist (cv);	411	get_padlist (aTHX_ cv);
354	}	412	}
355	}	413	}
356	#ifdef CXt_FORMAT
357	else if (CxTYPE (cx) == CXt_FORMAT)
358	{
359	/* I never used formats, so how should I know how these are implemented? */
360	/* my bold guess is as a simple, plain sub... */
361	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
362	}
363	#endif
364	}	414	}
365		415
366	if (top_si->si_type == PERLSI_MAIN)	416	if (top_si->si_type == PERLSI_MAIN)
367	break;	417	break;
368		418
…		…
372	}	422	}
373		423
374	PUTBACK;	424	PUTBACK;
375	}	425	}
376		426
377	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	427	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
378	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	428	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
379	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	429	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		430	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
380		431
381	#define VAR(name,type)c->name = PL_ ## name;	432	#define VAR(name,type)c->name = PL_ ## name;
382	# include "state.h"	433	# include "state.h"
383	#undef VAR	434	#undef VAR
384	}	435	}
…		…
387	* allocate various perl stacks. This is an exact copy	438	* allocate various perl stacks. This is an exact copy
388	* of perl.c:init_stacks, except that it uses less memory	439	* of perl.c:init_stacks, except that it uses less memory
389	* on the (sometimes correct) assumption that coroutines do	440	* on the (sometimes correct) assumption that coroutines do
390	* not usually need a lot of stackspace.	441	* not usually need a lot of stackspace.
391	*/	442	*/
		443	#if CORO_PREFER_PERL_FUNCTIONS
		444	# define coro_init_stacks init_stacks
		445	#else
392	static void	446	static void
393	coro_init_stacks ()	447	coro_init_stacks (pTHX)
394	{	448	{
395	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	449	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
396	PL_curstackinfo->si_type = PERLSI_MAIN;	450	PL_curstackinfo->si_type = PERLSI_MAIN;
397	PL_curstack = PL_curstackinfo->si_stack;	451	PL_curstack = PL_curstackinfo->si_stack;
398	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
426	New(54,PL_retstack,16,OP*);	480	New(54,PL_retstack,16,OP*);
427	PL_retstack_ix = 0;	481	PL_retstack_ix = 0;
428	PL_retstack_max = 16;	482	PL_retstack_max = 16;
429	#endif	483	#endif
430	}	484	}
		485	#endif
431		486
432	/*	487	/*
433	* destroy the stacks, the callchain etc...	488	* destroy the stacks, the callchain etc...
434	*/	489	*/
435	static void	490	static void
436	coro_destroy_stacks ()	491	coro_destroy_stacks (pTHX)
437	{	492	{
438	if (!IN_DESTRUCT)	493	if (!IN_DESTRUCT)
439	{	494	{
440	/* is this ugly, I ask? */	495	/* restore all saved variables and stuff */
441	LEAVE_SCOPE (0);	496	LEAVE_SCOPE (0);
		497	assert (PL_tmps_floor == -1);
442		498
443	/* sure it is, but more important: is it correct?? :/ */	499	/* free all temporaries */
444	FREETMPS;	500	FREETMPS;
		501	assert (PL_tmps_ix == -1);
445		502
		503	/* unwind all extra stacks */
446	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	504	POPSTACK_TO (PL_mainstack);
		505
		506	/* unwind main stack */
		507	dounwind (-1);
447	}	508	}
448		509
449	while (PL_curstackinfo->si_next)	510	while (PL_curstackinfo->si_next)
450	PL_curstackinfo = PL_curstackinfo->si_next;	511	PL_curstackinfo = PL_curstackinfo->si_next;
451		512
452	while (PL_curstackinfo)	513	while (PL_curstackinfo)
453	{	514	{
454	PERL_SI *p = PL_curstackinfo->si_prev;	515	PERL_SI *p = PL_curstackinfo->si_prev;
455		516
456	{ /*D*//*remove*/
457	dSP;
458	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
459	PUTBACK; /* possibly superfluous */
460	}
461
462	if (!IN_DESTRUCT)	517	if (!IN_DESTRUCT)
463	{
464	dounwind (-1);/*D*//*remove*/
465	SvREFCNT_dec (PL_curstackinfo->si_stack);	518	SvREFCNT_dec (PL_curstackinfo->si_stack);
466	}
467		519
468	Safefree (PL_curstackinfo->si_cxstack);	520	Safefree (PL_curstackinfo->si_cxstack);
469	Safefree (PL_curstackinfo);	521	Safefree (PL_curstackinfo);
470	PL_curstackinfo = p;	522	PL_curstackinfo = p;
471	}	523	}
…		…
477	#if !PERL_VERSION_ATLEAST (5,9,0)	529	#if !PERL_VERSION_ATLEAST (5,9,0)
478	Safefree (PL_retstack);	530	Safefree (PL_retstack);
479	#endif	531	#endif
480	}	532	}
481		533
		534	/** coroutine stack handling ************************************************/
		535
482	static void	536	static void
483	setup_coro (struct coro *coro)	537	setup_coro (pTHX_ struct coro *coro)
484	{	538	{
485	/*	539	/*
486	* emulate part of the perl startup here.	540	* emulate part of the perl startup here.
487	*/	541	*/
488
489	coro_init_stacks ();	542	coro_init_stacks (aTHX);
490		543
491	PL_curcop = &PL_compiling;	544	PL_curcop = &PL_compiling;
492	PL_in_eval = EVAL_NULL;	545	PL_in_eval = EVAL_NULL;
		546	PL_comppad = 0;
493	PL_curpm = 0;	547	PL_curpm = 0;
494	PL_localizing = 0;	548	PL_localizing = 0;
495	PL_dirty = 0;	549	PL_dirty = 0;
496	PL_restartop = 0;	550	PL_restartop = 0;
497		551
498	{	552	{
499	dSP;	553	dSP;
500	LOGOP myop;	554	LOGOP myop;
501		555
502	/* I have no idea why this is needed, but it is */
503	PUSHMARK (SP);
504
505	SvREFCNT_dec (GvAV (PL_defgv));	556	SvREFCNT_dec (GvAV (PL_defgv));
506	GvAV (PL_defgv) = coro->args; coro->args = 0;	557	GvAV (PL_defgv) = coro->args; coro->args = 0;
507		558
508	Zero (&myop, 1, LOGOP);	559	Zero (&myop, 1, LOGOP);
509	myop.op_next = Nullop;	560	myop.op_next = Nullop;
510	myop.op_flags = OPf_WANT_VOID;	561	myop.op_flags = OPf_WANT_VOID;
511		562
512	PL_op = (OP *)&myop;
513
514	PUSHMARK (SP);	563	PUSHMARK (SP);
515	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	564	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
516	PUTBACK;	565	PUTBACK;
		566	PL_op = (OP *)&myop;
517	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
518	SPAGAIN;	568	SPAGAIN;
519	}	569	}
520		570
521	ENTER; /* necessary e.g. for dounwind */	571	ENTER; /* necessary e.g. for dounwind */
522	}	572	}
523		573
524	static void	574	static void
525	free_coro_mortal ()	575	free_coro_mortal (pTHX)
526	{	576	{
527	if (coro_mortal)	577	if (coro_mortal)
528	{	578	{
529	SvREFCNT_dec (coro_mortal);	579	SvREFCNT_dec (coro_mortal);
530	coro_mortal = 0;	580	coro_mortal = 0;
531	}	581	}
532	}	582	}
533		583
		584	/* inject a fake call to Coro::State::_cctx_init into the execution */
534	static void NOINLINE	585	static void NOINLINE
535	prepare_cctx (coro_cctx *cctx)	586	prepare_cctx (pTHX_ coro_cctx *cctx)
536	{	587	{
537	dSP;	588	dSP;
538	LOGOP myop;	589	LOGOP myop;
539		590
540	Zero (&myop, 1, LOGOP);	591	Zero (&myop, 1, LOGOP);
541	myop.op_next = PL_op;	592	myop.op_next = PL_op;
542	myop.op_flags = OPf_WANT_VOID;	593	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
543
544	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
545		594
546	PUSHMARK (SP);	595	PUSHMARK (SP);
		596	EXTEND (SP, 2);
		597	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
547	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	598	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
548	PUTBACK;	599	PUTBACK;
		600	PL_op = (OP *)&myop;
549	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	601	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
550	SPAGAIN;	602	SPAGAIN;
551	}	603	}
552		604
553	static void	605	static void
554	coro_run (void *arg)	606	coro_run (void *arg)
555	{	607	{
		608	dTHX;
		609
556	/* coro_run is the alternative epilogue of transfer() */	610	/* coro_run is the alternative tail of transfer(), so unlock here. */
557	UNLOCK;	611	UNLOCK;
558		612
559	/*	613	/*
560	* this is a _very_ stripped down perl interpreter ;)	614	* this is a _very_ stripped down perl interpreter ;)
561	*/	615	*/
562	PL_top_env = &PL_start_env;	616	PL_top_env = &PL_start_env;
563		617
564	/* inject call to cctx_init */	618	/* inject call to cctx_init */
565	prepare_cctx ((coro_cctx *)arg);	619	prepare_cctx (aTHX_ (coro_cctx *)arg);
566		620
567	/* somebody will hit me for both perl_run and PL_restartop */	621	/* somebody will hit me for both perl_run and PL_restartop */
		622	PL_restartop = PL_op;
568	perl_run (PL_curinterp);	623	perl_run (PL_curinterp);
569		624
570	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	625	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
571	abort ();	626	abort ();
572	}	627	}
573		628
574	static coro_cctx *	629	static coro_cctx *
575	cctx_new ()	630	cctx_new ()
576	{	631	{
577	coro_cctx *cctx;	632	coro_cctx *cctx;
		633	void *stack_start;
		634	size_t stack_size;
578		635
579	++cctx_count;	636	++cctx_count;
580		637
581	New (0, cctx, 1, coro_cctx);	638	Newz (0, cctx, 1, coro_cctx);
582		639
583	#if HAVE_MMAP	640	#if HAVE_MMAP
584		641
585	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	642	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
586	/* mmap suppsedly does allocate-on-write for us */	643	/* mmap supposedly does allocate-on-write for us */
587	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	644	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588		645
589	if (cctx->sptr == (void *)-1)	646	if (cctx->sptr != (void *)-1)
590	{
591	perror ("FATAL: unable to mmap stack for coroutine");
592	_exit (EXIT_FAILURE);
593	}	647	{
594
595	# if STACKGUARD	648	# if CORO_STACKGUARD
596	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	649	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
597	# endif	650	# endif
		651	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		652	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		653	cctx->mapped = 1;
		654	}
		655	else
		656	#endif
		657	{
		658	cctx->ssize = coro_stacksize * (long)sizeof (long);
		659	New (0, cctx->sptr, coro_stacksize, long);
598		660
599	#else
600
601	cctx->ssize = STACKSIZE * (long)sizeof (long);
602	New (0, cctx->sptr, STACKSIZE, long);
603
604	if (!cctx->sptr)	661	if (!cctx->sptr)
605	{	662	{
606	perror ("FATAL: unable to malloc stack for coroutine");	663	perror ("FATAL: unable to allocate stack for coroutine");
607	_exit (EXIT_FAILURE);	664	_exit (EXIT_FAILURE);
608	}	665	}
609		666
610	#endif	667	stack_start = cctx->sptr;
		668	stack_size = cctx->ssize;
		669	}
611		670
612	#if USE_VALGRIND	671	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
613	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
614	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
615	cctx->ssize + (char *)cctx->sptr
616	);
617	#endif
618
619	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	672	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
620		673
621	return cctx;	674	return cctx;
622	}	675	}
623		676
624	static void	677	static void
…		…
627	if (!cctx)	680	if (!cctx)
628	return;	681	return;
629		682
630	--cctx_count;	683	--cctx_count;
631		684
632	#if USE_VALGRIND	685	#if CORO_USE_VALGRIND
633	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	686	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
634	#endif	687	#endif
635		688
636	#if HAVE_MMAP	689	#if HAVE_MMAP
		690	if (cctx->mapped)
637	munmap (cctx->sptr, cctx->ssize);	691	munmap (cctx->sptr, cctx->ssize);
638	#else	692	else
		693	#endif
639	Safefree (cctx->sptr);	694	Safefree (cctx->sptr);
640	#endif
641		695
642	Safefree (cctx);	696	Safefree (cctx);
643	}	697	}
644		698
645	static coro_cctx *	699	static coro_cctx *
646	cctx_get ()	700	cctx_get (pTHX)
647	{	701	{
648	coro_cctx *cctx;
649
650	if (cctx_first)	702	while (cctx_first)
651	{	703	{
652	cctx = cctx_first;	704	coro_cctx *cctx = cctx_first;
653	cctx_first = cctx->next;	705	cctx_first = cctx->next;
654	--cctx_idle;	706	--cctx_idle;
		707
		708	if (cctx->ssize >= coro_stacksize)
		709	return cctx;
		710
		711	cctx_destroy (cctx);
655	}	712	}
656	else	713
657	{
658	cctx = cctx_new ();
659	PL_op = PL_op->op_next;	714	PL_op = PL_op->op_next;
660	}
661
662	return cctx;	715	return cctx_new ();
663	}	716	}
664		717
665	static void	718	static void
666	cctx_put (coro_cctx *cctx)	719	cctx_put (coro_cctx *cctx)
667	{	720	{
…		…
679	++cctx_idle;	732	++cctx_idle;
680	cctx->next = cctx_first;	733	cctx->next = cctx_first;
681	cctx_first = cctx;	734	cctx_first = cctx;
682	}	735	}
683		736
		737	/** coroutine switching *****************************************************/
		738
684	/* never call directly, always through the coro_state_transfer global variable */	739	/* never call directly, always through the coro_state_transfer global variable */
685	static void NOINLINE	740	static void NOINLINE
686	transfer (struct coro *prev, struct coro *next, int flags)	741	transfer (pTHX_ struct coro *prev, struct coro *next)
687	{	742	{
688	dSTACKLEVEL;	743	dSTACKLEVEL;
689		744
690	/* sometimes transfer is only called to set idle_sp */	745	/* sometimes transfer is only called to set idle_sp */
691	if (flags == TRANSFER_SET_STACKLEVEL)	746	if (!next)
		747	{
692	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	748	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		749	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		750	}
693	else if (prev != next)	751	else if (prev != next)
694	{	752	{
695	coro_cctx *prev__cctx;	753	coro_cctx *prev__cctx;
696		754
697	if (prev->flags & CF_NEW)	755	if (prev->flags & CF_NEW)
…		…
708	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");	766	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
709		767
710	if (next->flags & CF_RUNNING)	768	if (next->flags & CF_RUNNING)
711	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	769	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
712		770
		771	if (next->flags & CF_DESTROYED)
		772	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		773
713	prev->flags &= ~CF_RUNNING;	774	prev->flags &= ~CF_RUNNING;
714	next->flags |= CF_RUNNING;	775	next->flags |= CF_RUNNING;
715		776
716	LOCK;	777	LOCK;
717		778
718	if (next->mainstack)	779	if (next->flags & CF_NEW)
719	{	780	{
720	/* coroutine already started */	781	/* need to start coroutine */
721	SAVE (prev, flags);	782	next->flags &= ~CF_NEW;
722	LOAD (next);	783	/* first get rid of the old state */
		784	save_perl (aTHX_ prev);
		785	/* setup coroutine call */
		786	setup_coro (aTHX_ next);
		787	/* need a new stack */
		788	assert (!next->cctx);
723	}	789	}
724	else	790	else
725	{	791	{
726	/* need to start coroutine */	792	/* coroutine already started */
727	assert (next->flags & CF_NEW);	793	save_perl (aTHX_ prev);
728	next->flags &= ~CF_NEW;	794	load_perl (aTHX_ next);
729	/* first get rid of the old state */
730	SAVE (prev, -1);
731	/* setup coroutine call */
732	setup_coro (next);
733	/* need a new stack */
734	assert (!next->stack);
735	}	795	}
736		796
737	prev__cctx = prev->cctx;	797	prev__cctx = prev->cctx;
738		798
739	/* possibly "free" the cctx */	799	/* possibly "free" the cctx */
740	if (prev__cctx->idle_sp == STACKLEVEL && 0)	800	if (prev__cctx->idle_sp == STACKLEVEL)
741	{	801	{
742	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	802	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
743	assert (PL_top_env == prev__cctx->top_env);	803	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
744		804
745	prev->cctx = 0;	805	prev->cctx = 0;
746		806
747	cctx_put (prev__cctx);	807	cctx_put (prev__cctx);
748	prev__cctx->inuse = 0;	808	prev__cctx->inuse = 0;
749	}	809	}
750		810
751	if (!next->cctx)	811	if (!next->cctx)
752	{	812	{
753	next->cctx = cctx_get ();	813	next->cctx = cctx_get (aTHX);
754	assert (!next->cctx->inuse);	814	assert (!next->cctx->inuse);
755	next->cctx->inuse = 1;	815	next->cctx->inuse = 1;
756	}	816	}
757		817
758	if (prev__cctx != next->cctx)	818	if (prev__cctx != next->cctx)
…		…
760	prev__cctx->top_env = PL_top_env;	820	prev__cctx->top_env = PL_top_env;
761	PL_top_env = next->cctx->top_env;	821	PL_top_env = next->cctx->top_env;
762	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	822	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
763	}	823	}
764		824
765	free_coro_mortal ();	825	free_coro_mortal (aTHX);
766
767	UNLOCK;	826	UNLOCK;
768	}	827	}
769	}	828	}
770		829
771	struct transfer_args	830	struct transfer_args
772	{	831	{
773	struct coro *prev, *next;	832	struct coro *prev, *next;
774	int flags;
775	};	833	};
776		834
777	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	835	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
778		836
		837	/** high level stuff ********************************************************/
		838
779	static void	839	static int
780	coro_state_destroy (struct coro *coro)	840	coro_state_destroy (pTHX_ struct coro *coro)
781	{	841	{
782	if (coro->refcnt--)	842	if (coro->flags & CF_DESTROYED)
783	return;	843	return 0;
		844
		845	coro->flags |= CF_DESTROYED;
		846
		847	if (coro->flags & CF_READY)
		848	{
		849	/* reduce nready, as destroying a ready coro effectively unreadies it */
		850	/* alternative: look through all ready queues and remove the coro */
		851	LOCK;
		852	--coro_nready;
		853	UNLOCK;
		854	}
		855	else
		856	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
784		857
785	if (coro->mainstack && coro->mainstack != main_mainstack)	858	if (coro->mainstack && coro->mainstack != main_mainstack)
786	{	859	{
787	struct coro temp;	860	struct coro temp;
		861
		862	assert (!(coro->flags & CF_RUNNING));
		863
		864	Zero (&temp, 1, struct coro);
		865	temp.save = CORO_SAVE_ALL;
788		866
789	if (coro->flags & CF_RUNNING)	867	if (coro->flags & CF_RUNNING)
790	croak ("FATAL: tried to destroy currently running coroutine");	868	croak ("FATAL: tried to destroy currently running coroutine");
791		869
792	SAVE ((&temp), TRANSFER_SAVE_ALL);	870	save_perl (aTHX_ &temp);
793	LOAD (coro);	871	load_perl (aTHX_ coro);
794		872
795	coro_destroy_stacks ();	873	coro_destroy_stacks (aTHX);
796		874
797	LOAD ((&temp)); /* this will get rid of defsv etc.. */	875	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
798		876
799	coro->mainstack = 0;	877	coro->mainstack = 0;
800	}	878	}
801		879
802	cctx_destroy (coro->cctx);	880	cctx_destroy (coro->cctx);
803	SvREFCNT_dec (coro->args);	881	SvREFCNT_dec (coro->args);
804	Safefree (coro);	882
		883	return 1;
805	}	884	}
806		885
807	static int	886	static int
808	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	887	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
809	{	888	{
810	struct coro *coro = (struct coro *)mg->mg_ptr;	889	struct coro *coro = (struct coro *)mg->mg_ptr;
811	mg->mg_ptr = 0;	890	mg->mg_ptr = 0;
812		891
		892	if (--coro->refcnt < 0)
		893	{
813	coro_state_destroy (coro);	894	coro_state_destroy (aTHX_ coro);
		895	Safefree (coro);
		896	}
814		897
815	return 0;	898	return 0;
816	}	899	}
817		900
818	static int	901	static int
…		…
825	return 0;	908	return 0;
826	}	909	}
827		910
828	static MGVTBL coro_state_vtbl = {	911	static MGVTBL coro_state_vtbl = {
829	0, 0, 0, 0,	912	0, 0, 0, 0,
830	coro_state_clear,	913	coro_state_free,
831	0,	914	0,
832	#ifdef MGf_DUP	915	#ifdef MGf_DUP
833	coro_state_dup,	916	coro_state_dup,
834	#else	917	#else
835	# define MGf_DUP 0	918	# define MGf_DUP 0
836	#endif	919	#endif
837	};	920	};
838		921
839	static struct coro *	922	static struct coro *
840	SvSTATE (SV *coro)	923	SvSTATE_ (pTHX_ SV *coro)
841	{	924	{
842	HV *stash;	925	HV *stash;
843	MAGIC *mg;	926	MAGIC *mg;
844		927
845	if (SvROK (coro))	928	if (SvROK (coro))
…		…
851	/* very slow, but rare, check */	934	/* very slow, but rare, check */
852	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	935	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
853	croak ("Coro::State object required");	936	croak ("Coro::State object required");
854	}	937	}
855		938
856	mg = SvMAGIC (coro);	939	mg = CORO_MAGIC (coro);
857	assert (mg->mg_type == PERL_MAGIC_ext);
858	return (struct coro *)mg->mg_ptr;	940	return (struct coro *)mg->mg_ptr;
859	}	941	}
860		942
		943	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		944
861	static void	945	static void
862	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	946	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
863	{	947	{
864	ta->prev = SvSTATE (prev);	948	ta->prev = SvSTATE (prev_sv);
865	ta->next = SvSTATE (next);	949	ta->next = SvSTATE (next_sv);
866	ta->flags = flags;
867	}	950	}
868		951
869	static void	952	static void
870	api_transfer (SV *prev, SV *next, int flags)	953	api_transfer (SV *prev_sv, SV *next_sv)
871	{	954	{
		955	dTHX;
872	struct transfer_args ta;	956	struct transfer_args ta;
873		957
874	prepare_transfer (&ta, prev, next, flags);	958	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
875	TRANSFER (ta);	959	TRANSFER (ta);
876	}	960	}
877		961
		962	static int
		963	api_save (SV *coro_sv, int new_save)
		964	{
		965	dTHX;
		966	struct coro *coro = SvSTATE (coro_sv);
		967	int old_save = coro->save;
		968
		969	if (new_save >= 0)
		970	coro->save = new_save;
		971
		972	return old_save;
		973	}
		974
878	/** Coro ********************************************************************/	975	/** Coro ********************************************************************/
879		976
880	#define PRIO_MAX 3
881	#define PRIO_HIGH 1
882	#define PRIO_NORMAL 0
883	#define PRIO_LOW -1
884	#define PRIO_IDLE -3
885	#define PRIO_MIN -4
886
887	/* for Coro.pm */
888	static SV *coro_current;
889	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
890	static int coro_nready;
891
892	static void	977	static void
893	coro_enq (SV *coro_sv)	978	coro_enq (pTHX_ SV *coro_sv)
894	{	979	{
895	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	980	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
896	coro_nready++;
897	}	981	}
898		982
899	static SV *	983	static SV *
900	coro_deq (int min_prio)	984	coro_deq (pTHX_ int min_prio)
901	{	985	{
902	int prio = PRIO_MAX - PRIO_MIN;	986	int prio = PRIO_MAX - PRIO_MIN;
903		987
904	min_prio -= PRIO_MIN;	988	min_prio -= PRIO_MIN;
905	if (min_prio < 0)	989	if (min_prio < 0)
906	min_prio = 0;	990	min_prio = 0;
907		991
908	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	992	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
909	if (AvFILLp (coro_ready [prio]) >= 0)	993	if (AvFILLp (coro_ready [prio]) >= 0)
910	{
911	coro_nready--;
912	return av_shift (coro_ready [prio]);	994	return av_shift (coro_ready [prio]);
913	}
914		995
915	return 0;	996	return 0;
916	}	997	}
917		998
918	static int	999	static int
919	api_ready (SV *coro_sv)	1000	api_ready (SV *coro_sv)
920	{	1001	{
		1002	dTHX;
921	struct coro *coro;	1003	struct coro *coro;
922		1004
923	if (SvROK (coro_sv))	1005	if (SvROK (coro_sv))
924	coro_sv = SvRV (coro_sv);	1006	coro_sv = SvRV (coro_sv);
925		1007
926	coro = SvSTATE (coro_sv);	1008	coro = SvSTATE (coro_sv);
927		1009
928	if (coro->flags & CF_READY)	1010	if (coro->flags & CF_READY)
929	return 0;	1011	return 0;
930		1012
931	#if 0 /* this is actually harmless */
932	if (coro->flags & CF_RUNNING)
933	croak ("Coro::ready called on currently running coroutine");
934	#endif
935
936	coro->flags |= CF_READY;	1013	coro->flags |= CF_READY;
937		1014
938	LOCK;	1015	LOCK;
939	coro_enq (SvREFCNT_inc (coro_sv));	1016	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1017	++coro_nready;
940	UNLOCK;	1018	UNLOCK;
941		1019
942	return 1;	1020	return 1;
943	}	1021	}
944		1022
945	static int	1023	static int
946	api_is_ready (SV *coro_sv)	1024	api_is_ready (SV *coro_sv)
947	{	1025	{
		1026	dTHX;
948	return !!SvSTATE (coro_sv)->flags & CF_READY;	1027	return !!(SvSTATE (coro_sv)->flags & CF_READY);
949	}	1028	}
950		1029
951	static void	1030	static void
952	prepare_schedule (struct transfer_args *ta)	1031	prepare_schedule (pTHX_ struct transfer_args *ta)
953	{	1032	{
954	SV *prev, *next;	1033	SV *prev_sv, *next_sv;
955		1034
956	for (;;)	1035	for (;;)
957	{	1036	{
958	LOCK;	1037	LOCK;
959	next = coro_deq (PRIO_MIN);	1038	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1039
		1040	/* nothing to schedule: call the idle handler */
		1041	if (!next_sv)
		1042	{
		1043	dSP;
		1044	UNLOCK;
		1045
		1046	ENTER;
		1047	SAVETMPS;
		1048
		1049	PUSHMARK (SP);
		1050	PUTBACK;
		1051	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1052
		1053	FREETMPS;
		1054	LEAVE;
		1055	continue;
		1056	}
		1057
		1058	ta->next = SvSTATE (next_sv);
		1059
		1060	/* cannot transfer to destroyed coros, skip and look for next */
		1061	if (ta->next->flags & CF_DESTROYED)
		1062	{
		1063	UNLOCK;
		1064	SvREFCNT_dec (next_sv);
		1065	/* coro_nready is already taken care of by destroy */
		1066	continue;
		1067	}
		1068
		1069	--coro_nready;
960	UNLOCK;	1070	UNLOCK;
961
962	if (next)
963	break;	1071	break;
964
965	{
966	dSP;
967
968	ENTER;
969	SAVETMPS;
970
971	PUSHMARK (SP);
972	PUTBACK;
973	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
974
975	FREETMPS;
976	LEAVE;
977	}	1072	}
978	}
979
980	prev = SvRV (coro_current);
981	SvRV_set (coro_current, next);
982		1073
983	/* free this only after the transfer */	1074	/* free this only after the transfer */
		1075	prev_sv = SvRV (coro_current);
		1076	SvRV_set (coro_current, next_sv);
		1077	ta->prev = SvSTATE (prev_sv);
		1078
		1079	assert (ta->next->flags & CF_READY);
		1080	ta->next->flags &= ~CF_READY;
		1081
984	LOCK;	1082	LOCK;
985	free_coro_mortal ();	1083	free_coro_mortal (aTHX);
		1084	coro_mortal = prev_sv;
986	UNLOCK;	1085	UNLOCK;
987	coro_mortal = prev;
988
989	assert (!SvROK(prev));//D
990	assert (!SvROK(next));//D
991
992	ta->prev = SvSTATE (prev);
993	ta->next = SvSTATE (next);
994	ta->flags = TRANSFER_SAVE_ALL;
995
996	assert (ta->flags & CF_READY);
997	ta->next->flags &= ~CF_READY;
998	}	1086	}
999		1087
1000	static void	1088	static void
1001	prepare_cede (struct transfer_args *ta)	1089	prepare_cede (pTHX_ struct transfer_args *ta)
1002	{	1090	{
1003	api_ready (coro_current);	1091	api_ready (coro_current);
1004
1005	prepare_schedule (ta);	1092	prepare_schedule (aTHX_ ta);
		1093	}
		1094
		1095	static int
		1096	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1097	{
		1098	if (coro_nready)
		1099	{
		1100	SV *prev = SvRV (coro_current);
		1101	prepare_schedule (aTHX_ ta);
		1102	api_ready (prev);
		1103	return 1;
		1104	}
		1105	else
		1106	return 0;
1006	}	1107	}
1007		1108
1008	static void	1109	static void
1009	api_schedule (void)	1110	api_schedule (void)
1010	{	1111	{
		1112	dTHX;
1011	struct transfer_args ta;	1113	struct transfer_args ta;
1012		1114
1013	prepare_schedule (&ta);	1115	prepare_schedule (aTHX_ &ta);
1014	TRANSFER (ta);	1116	TRANSFER (ta);
1015	}	1117	}
1016		1118
1017	static void	1119	static int
1018	api_cede (void)	1120	api_cede (void)
1019	{	1121	{
		1122	dTHX;
1020	struct transfer_args ta;	1123	struct transfer_args ta;
1021		1124
1022	prepare_cede (&ta);	1125	prepare_cede (aTHX_ &ta);
		1126
		1127	if (ta.prev != ta.next)
		1128	{
1023	TRANSFER (ta);	1129	TRANSFER (ta);
		1130	return 1;
		1131	}
		1132	else
		1133	return 0;
		1134	}
		1135
		1136	static int
		1137	api_cede_notself (void)
		1138	{
		1139	dTHX;
		1140	struct transfer_args ta;
		1141
		1142	if (prepare_cede_notself (aTHX_ &ta))
		1143	{
		1144	TRANSFER (ta);
		1145	return 1;
		1146	}
		1147	else
		1148	return 0;
1024	}	1149	}
1025		1150
1026	MODULE = Coro::State PACKAGE = Coro::State	1151	MODULE = Coro::State PACKAGE = Coro::State
1027		1152
1028	PROTOTYPES: DISABLE	1153	PROTOTYPES: DISABLE
…		…
1034	#endif	1159	#endif
1035	BOOT_PAGESIZE;	1160	BOOT_PAGESIZE;
1036		1161
1037	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1162	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1038		1163
1039	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1164	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1040	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1165	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1041	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1166	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1167	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1168	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1042		1169
1043	main_mainstack = PL_mainstack;	1170	main_mainstack = PL_mainstack;
1044		1171
1045	coroapi.ver = CORO_API_VERSION;	1172	coroapi.ver = CORO_API_VERSION;
1046	coroapi.transfer = api_transfer;	1173	coroapi.transfer = api_transfer;
…		…
1056	HV *hv;	1183	HV *hv;
1057	int i;	1184	int i;
1058		1185
1059	Newz (0, coro, 1, struct coro);	1186	Newz (0, coro, 1, struct coro);
1060	coro->args = newAV ();	1187	coro->args = newAV ();
		1188	coro->save = CORO_SAVE_ALL;
1061	coro->flags = CF_NEW;	1189	coro->flags = CF_NEW;
1062		1190
1063	hv = newHV ();	1191	hv = newHV ();
1064	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1192	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1065	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1193	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1066		1194
1067	for (i = 1; i < items; i++)	1195	for (i = 1; i < items; i++)
1068	av_push (coro->args, newSVsv (ST (i)));	1196	av_push (coro->args, newSVsv (ST (i)));
1069	}	1197	}
1070	OUTPUT:	1198	OUTPUT:
		1199	RETVAL
		1200
		1201	int
		1202	save (SV *coro, int new_save = -1)
		1203	CODE:
		1204	RETVAL = api_save (coro, new_save);
		1205	OUTPUT:
1071	RETVAL	1206	RETVAL
1072		1207
1073	void	1208	void
1074	_set_stacklevel (...)	1209	_set_stacklevel (...)
1075	ALIAS:	1210	ALIAS:
1076	Coro::State::transfer = 1	1211	Coro::State::transfer = 1
1077	Coro::schedule = 2	1212	Coro::schedule = 2
1078	Coro::cede = 3	1213	Coro::cede = 3
1079	Coro::Cont::yield = 4	1214	Coro::cede_notself = 4
1080	CODE:	1215	CODE:
1081	{	1216	{
1082	struct transfer_args ta;	1217	struct transfer_args ta;
1083		1218
1084	switch (ix)	1219	switch (ix)
1085	{	1220	{
1086	case 0:	1221	case 0:
1087	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1222	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1088	ta.next = 0;	1223	ta.next = 0;
1089	ta.flags = TRANSFER_SET_STACKLEVEL;
1090	break;	1224	break;
1091		1225
1092	case 1:	1226	case 1:
1093	if (items != 3)	1227	if (items != 2)
1094	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);	1228	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1095		1229
1096	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1230	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1097	break;	1231	break;
1098		1232
1099	case 2:	1233	case 2:
1100	prepare_schedule (&ta);	1234	prepare_schedule (aTHX_ &ta);
1101	break;	1235	break;
1102		1236
1103	case 3:	1237	case 3:
1104	prepare_cede (&ta);	1238	prepare_cede (aTHX_ &ta);
1105	break;	1239	break;
1106		1240
1107	case 4:	1241	case 4:
1108	{	1242	if (!prepare_cede_notself (aTHX_ &ta))
1109	SV *yieldstack;	1243	XSRETURN_EMPTY;
1110	SV *sv;
1111	AV *defav = GvAV (PL_defgv);
1112		1244
1113	yieldstack = *hv_fetch (
1114	(HV *)SvRV (coro_current),
1115	"yieldstack", sizeof ("yieldstack") - 1,
1116	0
1117	);
1118
1119	/* set up @_ -- ugly */
1120	av_clear (defav);
1121	av_fill (defav, items - 1);
1122	while (items--)
1123	av_store (defav, items, SvREFCNT_inc (ST(items)));
1124
1125	sv = av_pop ((AV *)SvRV (yieldstack));
1126	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1127	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1128	ta.flags = 0;
1129	SvREFCNT_dec (sv);
1130	}
1131	break;	1245	break;
1132
1133	}	1246	}
1134		1247
		1248	BARRIER;
1135	TRANSFER (ta);	1249	TRANSFER (ta);
1136	}
1137		1250
1138	void	1251	if (GIMME_V != G_VOID && ta.next != ta.prev)
1139	_clone_state_from (SV *dst, SV *src)	1252	XSRETURN_YES;
		1253	}
		1254
		1255	bool
		1256	_destroy (SV *coro_sv)
1140	CODE:	1257	CODE:
1141	{	1258	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1142	struct coro *coro_src = SvSTATE (src);	1259	OUTPUT:
1143		1260	RETVAL
1144	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1145
1146	++coro_src->refcnt;
1147	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1148	}
1149		1261
1150	void	1262	void
1151	_exit (code)	1263	_exit (code)
1152	int code	1264	int code
1153	PROTOTYPE: $	1265	PROTOTYPE: $
1154	CODE:	1266	CODE:
1155	_exit (code);	1267	_exit (code);
1156		1268
1157	int	1269	int
		1270	cctx_stacksize (int new_stacksize = 0)
		1271	CODE:
		1272	RETVAL = coro_stacksize;
		1273	if (new_stacksize)
		1274	coro_stacksize = new_stacksize;
		1275	OUTPUT:
		1276	RETVAL
		1277
		1278	int
1158	cctx_count ()	1279	cctx_count ()
1159	CODE:	1280	CODE:
1160	RETVAL = cctx_count;	1281	RETVAL = cctx_count;
1161	OUTPUT:	1282	OUTPUT:
1162	RETVAL	1283	RETVAL
…		…
1190	coro_ready[i] = newAV ();	1311	coro_ready[i] = newAV ();
1191		1312
1192	{	1313	{
1193	SV *sv = perl_get_sv("Coro::API", 1);	1314	SV *sv = perl_get_sv("Coro::API", 1);
1194		1315
1195	coroapi.schedule = api_schedule;	1316	coroapi.schedule = api_schedule;
		1317	coroapi.save = api_save;
1196	coroapi.cede = api_cede;	1318	coroapi.cede = api_cede;
		1319	coroapi.cede_notself = api_cede_notself;
1197	coroapi.ready = api_ready;	1320	coroapi.ready = api_ready;
1198	coroapi.is_ready = api_is_ready;	1321	coroapi.is_ready = api_is_ready;
1199	coroapi.nready = &coro_nready;	1322	coroapi.nready = &coro_nready;
1200	coroapi.current = coro_current;	1323	coroapi.current = coro_current;
1201		1324
1202	GCoroAPI = &coroapi;	1325	GCoroAPI = &coroapi;
1203	sv_setiv (sv, (IV)&coroapi);	1326	sv_setiv (sv, (IV)&coroapi);
1204	SvREADONLY_on (sv);	1327	SvREADONLY_on (sv);
1205	}	1328	}
1206	}	1329	}
		1330
		1331	void
		1332	_set_current (SV *current)
		1333	PROTOTYPE: $
		1334	CODE:
		1335	SvREFCNT_dec (SvRV (coro_current));
		1336	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1207		1337
1208	int	1338	int
1209	prio (Coro::State coro, int newprio = 0)	1339	prio (Coro::State coro, int newprio = 0)
1210	ALIAS:	1340	ALIAS:
1211	nice = 1	1341	nice = 1
…		…
1214	RETVAL = coro->prio;	1344	RETVAL = coro->prio;
1215		1345
1216	if (items > 1)	1346	if (items > 1)
1217	{	1347	{
1218	if (ix)	1348	if (ix)
1219	newprio += coro->prio;	1349	newprio = coro->prio - newprio;
1220		1350
1221	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1351	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1222	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1352	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1223		1353
1224	coro->prio = newprio;	1354	coro->prio = newprio;
1225	}	1355	}
1226	}	1356	}
		1357	OUTPUT:
		1358	RETVAL
1227		1359
1228	SV *	1360	SV *
1229	ready (SV *self)	1361	ready (SV *self)
1230	PROTOTYPE: $	1362	PROTOTYPE: $
1231	CODE:	1363	CODE:
…		…
1247	CODE:	1379	CODE:
1248	RETVAL = coro_nready;	1380	RETVAL = coro_nready;
1249	OUTPUT:	1381	OUTPUT:
1250	RETVAL	1382	RETVAL
1251		1383
1252	void
1253	_set_current (SV *current)
1254	PROTOTYPE: $
1255	CODE:
1256	SvREFCNT_dec (SvRV (coro_current));
1257	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1258
1259	MODULE = Coro::State PACKAGE = Coro::AIO	1384	MODULE = Coro::State PACKAGE = Coro::AIO
1260		1385
1261	SV *	1386	SV *
1262	_get_state ()	1387	_get_state ()
1263	CODE:	1388	CODE:
1264	{	1389	{
1265	struct {	1390	struct io_state *data;
1266	int errorno;
1267	int laststype;
1268	int laststatval;
1269	Stat_t statcache;
1270	} data;
1271		1391
		1392	RETVAL = newSV (sizeof (struct io_state));
		1393	data = (struct io_state *)SvPVX (RETVAL);
		1394	SvCUR_set (RETVAL, sizeof (struct io_state));
		1395	SvPOK_only (RETVAL);
		1396
1272	data.errorno = errno;	1397	data->errorno = errno;
1273	data.laststype = PL_laststype;	1398	data->laststype = PL_laststype;
1274	data.laststatval = PL_laststatval;	1399	data->laststatval = PL_laststatval;
1275	data.statcache = PL_statcache;	1400	data->statcache = PL_statcache;
1276
1277	RETVAL = newSVpvn ((char *)&data, sizeof data);
1278	}	1401	}
1279	OUTPUT:	1402	OUTPUT:
1280	RETVAL	1403	RETVAL
1281		1404
1282	void	1405	void
1283	_set_state (char *data_)	1406	_set_state (char *data_)
1284	PROTOTYPE: $	1407	PROTOTYPE: $
1285	CODE:	1408	CODE:
1286	{	1409	{
1287	struct {	1410	struct io_state *data = (void *)data_;
1288	int errorno;
1289	int laststype;
1290	int laststatval;
1291	Stat_t statcache;
1292	} *data = (void *)data_;
1293		1411
1294	errno = data->errorno;	1412	errno = data->errorno;
1295	PL_laststype = data->laststype;	1413	PL_laststype = data->laststype;
1296	PL_laststatval = data->laststatval;	1414	PL_laststatval = data->laststatval;
1297	PL_statcache = data->statcache;	1415	PL_statcache = data->statcache;
1298	}	1416	}
		1417

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