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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.119 by root, Sat Dec 2 15:41:28 2006 UTC vs.
Revision 1.147 by root, Mon Mar 19 15:50:48 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	GV *deffh; /* default filehandle */
		183	SV *irssv; /* $/ */
		184	SV *irssv_sv; /* real $/ cache */
154		185
155	#define VAR(name,type) type name;	186	#define VAR(name,type) type name;
156	# include "state.h"	187	# include "state.h"
157	#undef VAR	188	#undef VAR
158		189
…		…
161	};	192	};
162		193
163	typedef struct coro *Coro__State;	194	typedef struct coro *Coro__State;
164	typedef struct coro *Coro__State_or_hashref;	195	typedef struct coro *Coro__State_or_hashref;
165		196
		197	/** Coro ********************************************************************/
		198
		199	#define PRIO_MAX 3
		200	#define PRIO_HIGH 1
		201	#define PRIO_NORMAL 0
		202	#define PRIO_LOW -1
		203	#define PRIO_IDLE -3
		204	#define PRIO_MIN -4
		205
		206	/* for Coro.pm */
		207	static SV *coro_current;
		208	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		209	static int coro_nready;
		210
		211	/** lowlevel stuff **********************************************************/
		212
166	static AV *	213	static AV *
167	coro_clone_padlist (CV *cv)	214	coro_clone_padlist (pTHX_ CV *cv)
168	{	215	{
169	AV *padlist = CvPADLIST (cv);	216	AV *padlist = CvPADLIST (cv);
170	AV *newpadlist, *newpad;	217	AV *newpadlist, *newpad;
171		218
172	newpadlist = newAV ();	219	newpadlist = newAV ();
…		…
184		231
185	return newpadlist;	232	return newpadlist;
186	}	233	}
187		234
188	static void	235	static void
189	free_padlist (AV *padlist)	236	free_padlist (pTHX_ AV *padlist)
190	{	237	{
191	/* may be during global destruction */	238	/* may be during global destruction */
192	if (SvREFCNT (padlist))	239	if (SvREFCNT (padlist))
193	{	240	{
194	I32 i = AvFILLp (padlist);	241	I32 i = AvFILLp (padlist);
…		…
215	AV *padlist;	262	AV *padlist;
216	AV *av = (AV *)mg->mg_obj;	263	AV *av = (AV *)mg->mg_obj;
217		264
218	/* casting is fun. */	265	/* casting is fun. */
219	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	266	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
220	free_padlist (padlist);	267	free_padlist (aTHX_ padlist);
221		268
222	SvREFCNT_dec (av);	269	SvREFCNT_dec (av);
223		270
224	return 0;	271	return 0;
225	}	272	}
…		…
235	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	282	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
236	: 0	283	: 0
237		284
238	/* the next two functions merely cache the padlists */	285	/* the next two functions merely cache the padlists */
239	static void	286	static void
240	get_padlist (CV *cv)	287	get_padlist (pTHX_ CV *cv)
241	{	288	{
242	MAGIC *mg = CORO_MAGIC (cv);	289	MAGIC *mg = CORO_MAGIC (cv);
243	AV *av;	290	AV *av;
244		291
245	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	292	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
246	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	293	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
247	else	294	else
248	{	295	{
249	#if 0	296	#if CORO_PREFER_PERL_FUNCTIONS
250	/* this is probably cleaner, but also slower? */	297	/* this is probably cleaner, but also slower? */
251	CV *cp = Perl_cv_clone (cv);	298	CV *cp = Perl_cv_clone (cv);
252	CvPADLIST (cv) = CvPADLIST (cp);	299	CvPADLIST (cv) = CvPADLIST (cp);
253	CvPADLIST (cp) = 0;	300	CvPADLIST (cp) = 0;
254	SvREFCNT_dec (cp);	301	SvREFCNT_dec (cp);
255	#else	302	#else
256	CvPADLIST (cv) = coro_clone_padlist (cv);	303	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
257	#endif	304	#endif
258	}	305	}
259	}	306	}
260		307
261	static void	308	static void
262	put_padlist (CV *cv)	309	put_padlist (pTHX_ CV *cv)
263	{	310	{
264	MAGIC *mg = CORO_MAGIC (cv);	311	MAGIC *mg = CORO_MAGIC (cv);
265	AV *av;	312	AV *av;
266		313
267	if (!mg)	314	if (!mg)
…		…
278	av_extend (av, AvMAX (av) + 1);	325	av_extend (av, AvMAX (av) + 1);
279		326
280	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	327	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
281	}	328	}
282		329
		330	/** load & save, init *******************************************************/
		331
283	#define SB do {	332	#define SB do {
284	#define SE } while (0)	333	#define SE } while (0)
285		334
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	335	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
290		336
291	static void	337	static void
292	load_state (Coro__State c)	338	load_perl (pTHX_ Coro__State c)
293	{	339	{
294	#define VAR(name,type) PL_ ## name = c->name;	340	#define VAR(name,type) PL_ ## name = c->name;
295	# include "state.h"	341	# include "state.h"
296	#undef VAR	342	#undef VAR
297		343
298	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
299	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
300	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	346	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		347	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		348
		349	if (c->irssv)
		350	{
		351	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		352	{
		353	SvREFCNT_dec (c->irssv);
		354	c->irssv = 0;
		355	}
		356	else
		357	{
		358	REPLACE_SV (PL_rs, c->irssv);
		359	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		360	sv_setsv (c->irssv_sv, PL_rs);
		361	}
		362	}
301		363
302	{	364	{
303	dSP;	365	dSP;
304	CV *cv;	366	CV *cv;
305		367
306	/* now do the ugly restore mess */	368	/* now do the ugly restore mess */
307	while ((cv = (CV *)POPs))	369	while ((cv = (CV *)POPs))
308	{	370	{
309	put_padlist (cv); /* mark this padlist as available */	371	put_padlist (aTHX_ cv); /* mark this padlist as available */
310	CvDEPTH (cv) = PTR2IV (POPs);	372	CvDEPTH (cv) = PTR2IV (POPs);
311	CvPADLIST (cv) = (AV *)POPs;	373	CvPADLIST (cv) = (AV *)POPs;
312	}	374	}
313		375
314	PUTBACK;	376	PUTBACK;
315	}	377	}
		378	assert (!PL_comppad || AvARRAY (PL_comppad));//D
316	}	379	}
317		380
318	static void	381	static void
319	save_state (Coro__State c, int flags)	382	save_perl (pTHX_ Coro__State c)
320	{	383	{
		384	assert (!PL_comppad || AvARRAY (PL_comppad));//D
321	{	385	{
322	dSP;	386	dSP;
323	I32 cxix = cxstack_ix;	387	I32 cxix = cxstack_ix;
324	PERL_CONTEXT *ccstk = cxstack;	388	PERL_CONTEXT *ccstk = cxstack;
325	PERL_SI *top_si = PL_curstackinfo;	389	PERL_SI *top_si = PL_curstackinfo;
…		…
327	/*	391	/*
328	* the worst thing you can imagine happens first - we have to save	392	* the worst thing you can imagine happens first - we have to save
329	* (and reinitialize) all cv's in the whole callchain :(	393	* (and reinitialize) all cv's in the whole callchain :(
330	*/	394	*/
331		395
		396	EXTEND (SP, 3 + 1);
332	PUSHs (Nullsv);	397	PUSHs (Nullsv);
333	/* this loop was inspired by pp_caller */	398	/* this loop was inspired by pp_caller */
334	for (;;)	399	for (;;)
335	{	400	{
336	while (cxix >= 0)	401	while (cxix >= 0)
…		…
342	CV *cv = cx->blk_sub.cv;	407	CV *cv = cx->blk_sub.cv;
343		408
344	if (CvDEPTH (cv))	409	if (CvDEPTH (cv))
345	{	410	{
346	EXTEND (SP, 3);	411	EXTEND (SP, 3);
347
348	PUSHs ((SV *)CvPADLIST (cv));	412	PUSHs ((SV *)CvPADLIST (cv));
349	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	413	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
350	PUSHs ((SV *)cv);	414	PUSHs ((SV *)cv);
351		415
352	CvDEPTH (cv) = 0;	416	CvDEPTH (cv) = 0;
353	get_padlist (cv);	417	get_padlist (aTHX_ cv);
354	}	418	}
355	}	419	}
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	}	420	}
365		421
366	if (top_si->si_type == PERLSI_MAIN)	422	if (top_si->si_type == PERLSI_MAIN)
367	break;	423	break;
368		424
…		…
372	}	428	}
373		429
374	PUTBACK;	430	PUTBACK;
375	}	431	}
376		432
377	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	433	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;	434	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
379	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	435	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		436	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		437	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
380		438
381	#define VAR(name,type)c->name = PL_ ## name;	439	#define VAR(name,type)c->name = PL_ ## name;
382	# include "state.h"	440	# include "state.h"
383	#undef VAR	441	#undef VAR
384	}	442	}
…		…
387	* allocate various perl stacks. This is an exact copy	445	* allocate various perl stacks. This is an exact copy
388	* of perl.c:init_stacks, except that it uses less memory	446	* of perl.c:init_stacks, except that it uses less memory
389	* on the (sometimes correct) assumption that coroutines do	447	* on the (sometimes correct) assumption that coroutines do
390	* not usually need a lot of stackspace.	448	* not usually need a lot of stackspace.
391	*/	449	*/
		450	#if CORO_PREFER_PERL_FUNCTIONS
		451	# define coro_init_stacks init_stacks
		452	#else
392	static void	453	static void
393	coro_init_stacks ()	454	coro_init_stacks (pTHX)
394	{	455	{
395	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	456	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
396	PL_curstackinfo->si_type = PERLSI_MAIN;	457	PL_curstackinfo->si_type = PERLSI_MAIN;
397	PL_curstack = PL_curstackinfo->si_stack;	458	PL_curstack = PL_curstackinfo->si_stack;
398	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	459	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
426	New(54,PL_retstack,16,OP*);	487	New(54,PL_retstack,16,OP*);
427	PL_retstack_ix = 0;	488	PL_retstack_ix = 0;
428	PL_retstack_max = 16;	489	PL_retstack_max = 16;
429	#endif	490	#endif
430	}	491	}
		492	#endif
431		493
432	/*	494	/*
433	* destroy the stacks, the callchain etc...	495	* destroy the stacks, the callchain etc...
434	*/	496	*/
435	static void	497	static void
436	coro_destroy_stacks ()	498	coro_destroy_stacks (pTHX)
437	{	499	{
438	if (!IN_DESTRUCT)	500	if (!IN_DESTRUCT)
439	{	501	{
440	/* is this ugly, I ask? */	502	/* restore all saved variables and stuff */
441	LEAVE_SCOPE (0);	503	LEAVE_SCOPE (0);
		504	assert (PL_tmps_floor == -1);
442		505
443	/* sure it is, but more important: is it correct?? :/ */	506	/* free all temporaries */
444	FREETMPS;	507	FREETMPS;
		508	assert (PL_tmps_ix == -1);
445		509
		510	/* unwind all extra stacks */
446	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	511	POPSTACK_TO (PL_mainstack);
		512
		513	/* unwind main stack */
		514	dounwind (-1);
447	}	515	}
448		516
449	while (PL_curstackinfo->si_next)	517	while (PL_curstackinfo->si_next)
450	PL_curstackinfo = PL_curstackinfo->si_next;	518	PL_curstackinfo = PL_curstackinfo->si_next;
451		519
452	while (PL_curstackinfo)	520	while (PL_curstackinfo)
453	{	521	{
454	PERL_SI *p = PL_curstackinfo->si_prev;	522	PERL_SI *p = PL_curstackinfo->si_prev;
455		523
456	{ /*D*//*remove*/
457	dSP;
458	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
459	PUTBACK; /* possibly superfluous */
460	}
461
462	if (!IN_DESTRUCT)	524	if (!IN_DESTRUCT)
463	{
464	dounwind (-1);/*D*//*remove*/
465	SvREFCNT_dec (PL_curstackinfo->si_stack);	525	SvREFCNT_dec (PL_curstackinfo->si_stack);
466	}
467		526
468	Safefree (PL_curstackinfo->si_cxstack);	527	Safefree (PL_curstackinfo->si_cxstack);
469	Safefree (PL_curstackinfo);	528	Safefree (PL_curstackinfo);
470	PL_curstackinfo = p;	529	PL_curstackinfo = p;
471	}	530	}
…		…
477	#if !PERL_VERSION_ATLEAST (5,9,0)	536	#if !PERL_VERSION_ATLEAST (5,9,0)
478	Safefree (PL_retstack);	537	Safefree (PL_retstack);
479	#endif	538	#endif
480	}	539	}
481		540
		541	/** coroutine stack handling ************************************************/
		542
482	static void	543	static void
483	setup_coro (struct coro *coro)	544	setup_coro (pTHX_ struct coro *coro)
484	{	545	{
485	/*	546	/*
486	* emulate part of the perl startup here.	547	* emulate part of the perl startup here.
487	*/	548	*/
488
489	coro_init_stacks ();	549	coro_init_stacks (aTHX);
490		550
491	PL_curcop = &PL_compiling;	551	PL_curcop = &PL_compiling;
492	PL_in_eval = EVAL_NULL;	552	PL_in_eval = EVAL_NULL;
		553	PL_comppad = 0;
493	PL_curpm = 0;	554	PL_curpm = 0;
494	PL_localizing = 0;	555	PL_localizing = 0;
495	PL_dirty = 0;	556	PL_dirty = 0;
496	PL_restartop = 0;	557	PL_restartop = 0;
497		558
498	{	559	{
499	dSP;	560	dSP;
500	LOGOP myop;	561	LOGOP myop;
501		562
502	/* I have no idea why this is needed, but it is */
503	PUSHMARK (SP);
504
505	SvREFCNT_dec (GvAV (PL_defgv));	563	SvREFCNT_dec (GvAV (PL_defgv));
506	GvAV (PL_defgv) = coro->args; coro->args = 0;	564	GvAV (PL_defgv) = coro->args; coro->args = 0;
507		565
508	Zero (&myop, 1, LOGOP);	566	Zero (&myop, 1, LOGOP);
509	myop.op_next = Nullop;	567	myop.op_next = Nullop;
510	myop.op_flags = OPf_WANT_VOID;	568	myop.op_flags = OPf_WANT_VOID;
511		569
512	PL_op = (OP *)&myop;
513
514	PUSHMARK (SP);	570	PUSHMARK (SP);
515	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	571	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
516	PUTBACK;	572	PUTBACK;
		573	PL_op = (OP *)&myop;
517	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
518	SPAGAIN;	575	SPAGAIN;
519	}	576	}
520		577
521	ENTER; /* necessary e.g. for dounwind */	578	ENTER; /* necessary e.g. for dounwind */
522	}	579	}
523		580
524	static void	581	static void
525	free_coro_mortal ()	582	free_coro_mortal (pTHX)
526	{	583	{
527	if (coro_mortal)	584	if (coro_mortal)
528	{	585	{
529	SvREFCNT_dec (coro_mortal);	586	SvREFCNT_dec (coro_mortal);
530	coro_mortal = 0;	587	coro_mortal = 0;
531	}	588	}
532	}	589	}
533		590
		591	/* inject a fake call to Coro::State::_cctx_init into the execution */
534	static void NOINLINE	592	static void NOINLINE
535	prepare_cctx (coro_cctx *cctx)	593	prepare_cctx (pTHX_ coro_cctx *cctx)
536	{	594	{
537	dSP;	595	dSP;
538	LOGOP myop;	596	LOGOP myop;
539		597
540	Zero (&myop, 1, LOGOP);	598	Zero (&myop, 1, LOGOP);
541	myop.op_next = PL_op;	599	myop.op_next = PL_op;
542	myop.op_flags = OPf_WANT_VOID;	600	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
543
544	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
545		601
546	PUSHMARK (SP);	602	PUSHMARK (SP);
		603	EXTEND (SP, 2);
		604	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
547	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	605	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
548	PUTBACK;	606	PUTBACK;
		607	PL_op = (OP *)&myop;
549	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	608	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
550	SPAGAIN;	609	SPAGAIN;
551	}	610	}
552		611
553	static void	612	static void
554	coro_run (void *arg)	613	coro_run (void *arg)
555	{	614	{
		615	dTHX;
		616
556	/* coro_run is the alternative epilogue of transfer() */	617	/* coro_run is the alternative tail of transfer(), so unlock here. */
557	UNLOCK;	618	UNLOCK;
558		619
559	/*	620	/*
560	* this is a _very_ stripped down perl interpreter ;)	621	* this is a _very_ stripped down perl interpreter ;)
561	*/	622	*/
562	PL_top_env = &PL_start_env;	623	PL_top_env = &PL_start_env;
563		624
564	/* inject call to cctx_init */	625	/* inject call to cctx_init */
565	prepare_cctx ((coro_cctx *)arg);	626	prepare_cctx (aTHX_ (coro_cctx *)arg);
566		627
567	/* somebody will hit me for both perl_run and PL_restartop */	628	/* somebody will hit me for both perl_run and PL_restartop */
		629	PL_restartop = PL_op;
568	perl_run (PL_curinterp);	630	perl_run (PL_curinterp);
569		631
570	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	632	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
571	abort ();	633	abort ();
572	}	634	}
573		635
574	static coro_cctx *	636	static coro_cctx *
575	cctx_new ()	637	cctx_new ()
576	{	638	{
577	coro_cctx *cctx;	639	coro_cctx *cctx;
		640	void *stack_start;
		641	size_t stack_size;
578		642
579	++cctx_count;	643	++cctx_count;
580		644
581	New (0, cctx, 1, coro_cctx);	645	Newz (0, cctx, 1, coro_cctx);
582		646
583	#if HAVE_MMAP	647	#if HAVE_MMAP
584		648
585	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	649	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
586	/* mmap suppsedly does allocate-on-write for us */	650	/* 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);	651	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588		652
589	if (cctx->sptr == (void *)-1)	653	if (cctx->sptr != (void *)-1)
590	{
591	perror ("FATAL: unable to mmap stack for coroutine");
592	_exit (EXIT_FAILURE);
593	}	654	{
594
595	# if STACKGUARD	655	# if CORO_STACKGUARD
596	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	656	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
597	# endif	657	# endif
		658	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		659	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		660	cctx->mapped = 1;
		661	}
		662	else
		663	#endif
		664	{
		665	cctx->ssize = coro_stacksize * (long)sizeof (long);
		666	New (0, cctx->sptr, coro_stacksize, long);
598		667
599	#else
600
601	cctx->ssize = STACKSIZE * (long)sizeof (long);
602	New (0, cctx->sptr, STACKSIZE, long);
603
604	if (!cctx->sptr)	668	if (!cctx->sptr)
605	{	669	{
606	perror ("FATAL: unable to malloc stack for coroutine");	670	perror ("FATAL: unable to allocate stack for coroutine");
607	_exit (EXIT_FAILURE);	671	_exit (EXIT_FAILURE);
608	}	672	}
609		673
610	#endif	674	stack_start = cctx->sptr;
		675	stack_size = cctx->ssize;
		676	}
611		677
612	#if USE_VALGRIND	678	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);	679	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
620		680
621	return cctx;	681	return cctx;
622	}	682	}
623		683
624	static void	684	static void
…		…
627	if (!cctx)	687	if (!cctx)
628	return;	688	return;
629		689
630	--cctx_count;	690	--cctx_count;
631		691
632	#if USE_VALGRIND	692	#if CORO_USE_VALGRIND
633	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	693	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
634	#endif	694	#endif
635		695
636	#if HAVE_MMAP	696	#if HAVE_MMAP
		697	if (cctx->mapped)
637	munmap (cctx->sptr, cctx->ssize);	698	munmap (cctx->sptr, cctx->ssize);
638	#else	699	else
		700	#endif
639	Safefree (cctx->sptr);	701	Safefree (cctx->sptr);
640	#endif
641		702
642	Safefree (cctx);	703	Safefree (cctx);
643	}	704	}
644		705
645	static coro_cctx *	706	static coro_cctx *
646	cctx_get ()	707	cctx_get (pTHX)
647	{	708	{
648	coro_cctx *cctx;
649
650	if (cctx_first)	709	while (cctx_first)
651	{	710	{
652	cctx = cctx_first;	711	coro_cctx *cctx = cctx_first;
653	cctx_first = cctx->next;	712	cctx_first = cctx->next;
654	--cctx_idle;	713	--cctx_idle;
		714
		715	if (cctx->ssize >= coro_stacksize)
		716	return cctx;
		717
		718	cctx_destroy (cctx);
655	}	719	}
656	else	720
657	{
658	cctx = cctx_new ();
659	PL_op = PL_op->op_next;	721	PL_op = PL_op->op_next;
660	}
661
662	return cctx;	722	return cctx_new ();
663	}	723	}
664		724
665	static void	725	static void
666	cctx_put (coro_cctx *cctx)	726	cctx_put (coro_cctx *cctx)
667	{	727	{
…		…
679	++cctx_idle;	739	++cctx_idle;
680	cctx->next = cctx_first;	740	cctx->next = cctx_first;
681	cctx_first = cctx;	741	cctx_first = cctx;
682	}	742	}
683		743
		744	/** coroutine switching *****************************************************/
		745
684	/* never call directly, always through the coro_state_transfer global variable */	746	/* never call directly, always through the coro_state_transfer global variable */
685	static void NOINLINE	747	static void NOINLINE
686	transfer (struct coro *prev, struct coro *next, int flags)	748	transfer (pTHX_ struct coro *prev, struct coro *next)
687	{	749	{
688	dSTACKLEVEL;	750	dSTACKLEVEL;
689		751
690	/* sometimes transfer is only called to set idle_sp */	752	/* sometimes transfer is only called to set idle_sp */
691	if (flags == TRANSFER_SET_STACKLEVEL)	753	if (!next)
		754	{
692	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	755	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		756	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		757	}
693	else if (prev != next)	758	else if (prev != next)
694	{	759	{
695	coro_cctx *prev__cctx;	760	coro_cctx *prev__cctx;
696		761
697	if (prev->flags & CF_NEW)	762	if (prev->flags & CF_NEW)
…		…
708	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");	773	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
709		774
710	if (next->flags & CF_RUNNING)	775	if (next->flags & CF_RUNNING)
711	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");	776	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
712		777
		778	if (next->flags & CF_DESTROYED)
		779	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		780
713	prev->flags &= ~CF_RUNNING;	781	prev->flags &= ~CF_RUNNING;
714	next->flags |= CF_RUNNING;	782	next->flags |= CF_RUNNING;
715		783
716	LOCK;	784	LOCK;
717		785
718	if (next->flags & CF_NEW)	786	if (next->flags & CF_NEW)
719	{	787	{
720	/* need to start coroutine */	788	/* need to start coroutine */
721	next->flags &= ~CF_NEW;	789	next->flags &= ~CF_NEW;
722	/* first get rid of the old state */	790	/* first get rid of the old state */
723	SAVE (prev, -1);	791	save_perl (aTHX_ prev);
724	/* setup coroutine call */	792	/* setup coroutine call */
725	setup_coro (next);	793	setup_coro (aTHX_ next);
726	/* need a new stack */	794	/* need a new stack */
727	assert (!next->stack);	795	assert (!next->cctx);
728	}	796	}
729	else	797	else
730	{	798	{
731	/* coroutine already started */	799	/* coroutine already started */
732	SAVE (prev, flags);	800	save_perl (aTHX_ prev);
733	LOAD (next);	801	load_perl (aTHX_ next);
734	}	802	}
735		803
736	prev__cctx = prev->cctx;	804	prev__cctx = prev->cctx;
737		805
738	/* possibly "free" the cctx */	806	/* possibly "free" the cctx */
739	if (prev__cctx->idle_sp == STACKLEVEL)	807	if (prev__cctx->idle_sp == STACKLEVEL)
740	{	808	{
741	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	809	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
742	assert (PL_top_env == prev__cctx->top_env);	810	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
743		811
744	prev->cctx = 0;	812	prev->cctx = 0;
745		813
746	cctx_put (prev__cctx);	814	cctx_put (prev__cctx);
747	prev__cctx->inuse = 0;	815	prev__cctx->inuse = 0;
748	}	816	}
749		817
750	if (!next->cctx)	818	if (!next->cctx)
751	{	819	{
752	next->cctx = cctx_get ();	820	next->cctx = cctx_get (aTHX);
753	assert (!next->cctx->inuse);	821	assert (!next->cctx->inuse);
754	next->cctx->inuse = 1;	822	next->cctx->inuse = 1;
755	}	823	}
756		824
757	if (prev__cctx != next->cctx)	825	if (prev__cctx != next->cctx)
…		…
759	prev__cctx->top_env = PL_top_env;	827	prev__cctx->top_env = PL_top_env;
760	PL_top_env = next->cctx->top_env;	828	PL_top_env = next->cctx->top_env;
761	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	829	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
762	}	830	}
763		831
764	free_coro_mortal ();	832	free_coro_mortal (aTHX);
765
766	UNLOCK;	833	UNLOCK;
767	}	834	}
768	}	835	}
769		836
770	struct transfer_args	837	struct transfer_args
771	{	838	{
772	struct coro *prev, *next;	839	struct coro *prev, *next;
773	int flags;
774	};	840	};
775		841
776	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	842	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
777		843
		844	/** high level stuff ********************************************************/
		845
778	static void	846	static int
779	coro_state_destroy (struct coro *coro)	847	coro_state_destroy (pTHX_ struct coro *coro)
780	{	848	{
781	if (coro->refcnt--)	849	if (coro->flags & CF_DESTROYED)
782	return;	850	return 0;
		851
		852	coro->flags |= CF_DESTROYED;
		853
		854	if (coro->flags & CF_READY)
		855	{
		856	/* reduce nready, as destroying a ready coro effectively unreadies it */
		857	/* alternative: look through all ready queues and remove the coro */
		858	LOCK;
		859	--coro_nready;
		860	UNLOCK;
		861	}
		862	else
		863	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
783		864
784	if (coro->mainstack && coro->mainstack != main_mainstack)	865	if (coro->mainstack && coro->mainstack != main_mainstack)
785	{	866	{
786	struct coro temp;	867	struct coro temp;
		868
		869	assert (!(coro->flags & CF_RUNNING));
		870
		871	Zero (&temp, 1, struct coro);
		872	temp.save = CORO_SAVE_DEF;
787		873
788	if (coro->flags & CF_RUNNING)	874	if (coro->flags & CF_RUNNING)
789	croak ("FATAL: tried to destroy currently running coroutine");	875	croak ("FATAL: tried to destroy currently running coroutine");
790		876
791	SAVE ((&temp), TRANSFER_SAVE_ALL);	877	save_perl (aTHX_ &temp);
792	LOAD (coro);	878	load_perl (aTHX_ coro);
793		879
794	coro_destroy_stacks ();	880	coro_destroy_stacks (aTHX);
795		881
796	LOAD ((&temp)); /* this will get rid of defsv etc.. */	882	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
797		883
798	coro->mainstack = 0;	884	coro->mainstack = 0;
799	}	885	}
800		886
801	cctx_destroy (coro->cctx);	887	cctx_destroy (coro->cctx);
802	SvREFCNT_dec (coro->args);	888	SvREFCNT_dec (coro->args);
803	Safefree (coro);	889
		890	return 1;
804	}	891	}
805		892
806	static int	893	static int
807	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	894	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
808	{	895	{
809	struct coro *coro = (struct coro *)mg->mg_ptr;	896	struct coro *coro = (struct coro *)mg->mg_ptr;
810	mg->mg_ptr = 0;	897	mg->mg_ptr = 0;
811		898
		899	if (--coro->refcnt < 0)
		900	{
812	coro_state_destroy (coro);	901	coro_state_destroy (aTHX_ coro);
		902	Safefree (coro);
		903	}
813		904
814	return 0;	905	return 0;
815	}	906	}
816		907
817	static int	908	static int
…		…
824	return 0;	915	return 0;
825	}	916	}
826		917
827	static MGVTBL coro_state_vtbl = {	918	static MGVTBL coro_state_vtbl = {
828	0, 0, 0, 0,	919	0, 0, 0, 0,
829	coro_state_clear,	920	coro_state_free,
830	0,	921	0,
831	#ifdef MGf_DUP	922	#ifdef MGf_DUP
832	coro_state_dup,	923	coro_state_dup,
833	#else	924	#else
834	# define MGf_DUP 0	925	# define MGf_DUP 0
835	#endif	926	#endif
836	};	927	};
837		928
838	static struct coro *	929	static struct coro *
839	SvSTATE (SV *coro)	930	SvSTATE_ (pTHX_ SV *coro)
840	{	931	{
841	HV *stash;	932	HV *stash;
842	MAGIC *mg;	933	MAGIC *mg;
843		934
844	if (SvROK (coro))	935	if (SvROK (coro))
…		…
850	/* very slow, but rare, check */	941	/* very slow, but rare, check */
851	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	942	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
852	croak ("Coro::State object required");	943	croak ("Coro::State object required");
853	}	944	}
854		945
855	mg = SvMAGIC (coro);	946	mg = CORO_MAGIC (coro);
856	assert (mg->mg_type == PERL_MAGIC_ext);
857	return (struct coro *)mg->mg_ptr;	947	return (struct coro *)mg->mg_ptr;
858	}	948	}
859		949
		950	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		951
860	static void	952	static void
861	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	953	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
862	{	954	{
863	ta->prev = SvSTATE (prev);	955	ta->prev = SvSTATE (prev_sv);
864	ta->next = SvSTATE (next);	956	ta->next = SvSTATE (next_sv);
865	ta->flags = flags;
866	}	957	}
867		958
868	static void	959	static void
869	api_transfer (SV *prev, SV *next, int flags)	960	api_transfer (SV *prev_sv, SV *next_sv)
870	{	961	{
		962	dTHX;
871	struct transfer_args ta;	963	struct transfer_args ta;
872		964
873	prepare_transfer (&ta, prev, next, flags);	965	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
874	TRANSFER (ta);	966	TRANSFER (ta);
875	}	967	}
876		968
		969	static int
		970	api_save (SV *coro_sv, int new_save)
		971	{
		972	dTHX;
		973	struct coro *coro = SvSTATE (coro_sv);
		974	int old_save = coro->save;
		975
		976	if (new_save >= 0)
		977	coro->save = new_save;
		978
		979	return old_save;
		980	}
		981
877	/** Coro ********************************************************************/	982	/** Coro ********************************************************************/
878		983
879	#define PRIO_MAX 3
880	#define PRIO_HIGH 1
881	#define PRIO_NORMAL 0
882	#define PRIO_LOW -1
883	#define PRIO_IDLE -3
884	#define PRIO_MIN -4
885
886	/* for Coro.pm */
887	static SV *coro_current;
888	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
889	static int coro_nready;
890
891	static void	984	static void
892	coro_enq (SV *coro_sv)	985	coro_enq (pTHX_ SV *coro_sv)
893	{	986	{
894	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	987	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
895	coro_nready++;
896	}	988	}
897		989
898	static SV *	990	static SV *
899	coro_deq (int min_prio)	991	coro_deq (pTHX_ int min_prio)
900	{	992	{
901	int prio = PRIO_MAX - PRIO_MIN;	993	int prio = PRIO_MAX - PRIO_MIN;
902		994
903	min_prio -= PRIO_MIN;	995	min_prio -= PRIO_MIN;
904	if (min_prio < 0)	996	if (min_prio < 0)
905	min_prio = 0;	997	min_prio = 0;
906		998
907	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	999	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
908	if (AvFILLp (coro_ready [prio]) >= 0)	1000	if (AvFILLp (coro_ready [prio]) >= 0)
909	{
910	coro_nready--;
911	return av_shift (coro_ready [prio]);	1001	return av_shift (coro_ready [prio]);
912	}
913		1002
914	return 0;	1003	return 0;
915	}	1004	}
916		1005
917	static int	1006	static int
918	api_ready (SV *coro_sv)	1007	api_ready (SV *coro_sv)
919	{	1008	{
		1009	dTHX;
920	struct coro *coro;	1010	struct coro *coro;
921		1011
922	if (SvROK (coro_sv))	1012	if (SvROK (coro_sv))
923	coro_sv = SvRV (coro_sv);	1013	coro_sv = SvRV (coro_sv);
924		1014
925	coro = SvSTATE (coro_sv);	1015	coro = SvSTATE (coro_sv);
926		1016
927	if (coro->flags & CF_READY)	1017	if (coro->flags & CF_READY)
928	return 0;	1018	return 0;
929		1019
930	#if 0 /* this is actually harmless */
931	if (coro->flags & CF_RUNNING)
932	croak ("Coro::ready called on currently running coroutine");
933	#endif
934
935	coro->flags |= CF_READY;	1020	coro->flags |= CF_READY;
936		1021
937	LOCK;	1022	LOCK;
938	coro_enq (SvREFCNT_inc (coro_sv));	1023	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1024	++coro_nready;
939	UNLOCK;	1025	UNLOCK;
940		1026
941	return 1;	1027	return 1;
942	}	1028	}
943		1029
944	static int	1030	static int
945	api_is_ready (SV *coro_sv)	1031	api_is_ready (SV *coro_sv)
946	{	1032	{
		1033	dTHX;
947	return !!SvSTATE (coro_sv)->flags & CF_READY;	1034	return !!(SvSTATE (coro_sv)->flags & CF_READY);
948	}	1035	}
949		1036
950	static void	1037	static void
951	prepare_schedule (struct transfer_args *ta)	1038	prepare_schedule (pTHX_ struct transfer_args *ta)
952	{	1039	{
953	SV *prev, *next;	1040	SV *prev_sv, *next_sv;
954		1041
955	for (;;)	1042	for (;;)
956	{	1043	{
957	LOCK;	1044	LOCK;
958	next = coro_deq (PRIO_MIN);	1045	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1046
		1047	/* nothing to schedule: call the idle handler */
		1048	if (!next_sv)
		1049	{
		1050	dSP;
		1051	UNLOCK;
		1052
		1053	ENTER;
		1054	SAVETMPS;
		1055
		1056	PUSHMARK (SP);
		1057	PUTBACK;
		1058	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1059
		1060	FREETMPS;
		1061	LEAVE;
		1062	continue;
		1063	}
		1064
		1065	ta->next = SvSTATE (next_sv);
		1066
		1067	/* cannot transfer to destroyed coros, skip and look for next */
		1068	if (ta->next->flags & CF_DESTROYED)
		1069	{
		1070	UNLOCK;
		1071	SvREFCNT_dec (next_sv);
		1072	/* coro_nready is already taken care of by destroy */
		1073	continue;
		1074	}
		1075
		1076	--coro_nready;
959	UNLOCK;	1077	UNLOCK;
960
961	if (next)
962	break;	1078	break;
963
964	{
965	dSP;
966
967	ENTER;
968	SAVETMPS;
969
970	PUSHMARK (SP);
971	PUTBACK;
972	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
973
974	FREETMPS;
975	LEAVE;
976	}	1079	}
977	}
978
979	prev = SvRV (coro_current);
980	SvRV_set (coro_current, next);
981		1080
982	/* free this only after the transfer */	1081	/* free this only after the transfer */
		1082	prev_sv = SvRV (coro_current);
		1083	SvRV_set (coro_current, next_sv);
		1084	ta->prev = SvSTATE (prev_sv);
		1085
		1086	assert (ta->next->flags & CF_READY);
		1087	ta->next->flags &= ~CF_READY;
		1088
983	LOCK;	1089	LOCK;
984	free_coro_mortal ();	1090	free_coro_mortal (aTHX);
		1091	coro_mortal = prev_sv;
985	UNLOCK;	1092	UNLOCK;
986	coro_mortal = prev;
987
988	assert (!SvROK(prev));//D
989	assert (!SvROK(next));//D
990
991	ta->prev = SvSTATE (prev);
992	ta->next = SvSTATE (next);
993	ta->flags = TRANSFER_SAVE_ALL;
994
995	assert (ta->flags & CF_READY);
996	ta->next->flags &= ~CF_READY;
997	}	1093	}
998		1094
999	static void	1095	static void
1000	prepare_cede (struct transfer_args *ta)	1096	prepare_cede (pTHX_ struct transfer_args *ta)
1001	{	1097	{
1002	api_ready (coro_current);	1098	api_ready (coro_current);
1003
1004	prepare_schedule (ta);	1099	prepare_schedule (aTHX_ ta);
		1100	}
		1101
		1102	static int
		1103	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1104	{
		1105	if (coro_nready)
		1106	{
		1107	SV *prev = SvRV (coro_current);
		1108	prepare_schedule (aTHX_ ta);
		1109	api_ready (prev);
		1110	return 1;
		1111	}
		1112	else
		1113	return 0;
1005	}	1114	}
1006		1115
1007	static void	1116	static void
1008	api_schedule (void)	1117	api_schedule (void)
1009	{	1118	{
		1119	dTHX;
1010	struct transfer_args ta;	1120	struct transfer_args ta;
1011		1121
1012	prepare_schedule (&ta);	1122	prepare_schedule (aTHX_ &ta);
1013	TRANSFER (ta);	1123	TRANSFER (ta);
1014	}	1124	}
1015		1125
1016	static void	1126	static int
1017	api_cede (void)	1127	api_cede (void)
1018	{	1128	{
		1129	dTHX;
1019	struct transfer_args ta;	1130	struct transfer_args ta;
1020		1131
1021	prepare_cede (&ta);	1132	prepare_cede (aTHX_ &ta);
		1133
		1134	if (ta.prev != ta.next)
		1135	{
1022	TRANSFER (ta);	1136	TRANSFER (ta);
		1137	return 1;
		1138	}
		1139	else
		1140	return 0;
		1141	}
		1142
		1143	static int
		1144	api_cede_notself (void)
		1145	{
		1146	dTHX;
		1147	struct transfer_args ta;
		1148
		1149	if (prepare_cede_notself (aTHX_ &ta))
		1150	{
		1151	TRANSFER (ta);
		1152	return 1;
		1153	}
		1154	else
		1155	return 0;
1023	}	1156	}
1024		1157
1025	MODULE = Coro::State PACKAGE = Coro::State	1158	MODULE = Coro::State PACKAGE = Coro::State
1026		1159
1027	PROTOTYPES: DISABLE	1160	PROTOTYPES: DISABLE
…		…
1033	#endif	1166	#endif
1034	BOOT_PAGESIZE;	1167	BOOT_PAGESIZE;
1035		1168
1036	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1169	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1037		1170
1038	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1171	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1039	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1172	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1040	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1173	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1174	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1175	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1176	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1177	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1041		1178
1042	main_mainstack = PL_mainstack;	1179	main_mainstack = PL_mainstack;
1043		1180
1044	coroapi.ver = CORO_API_VERSION;	1181	coroapi.ver = CORO_API_VERSION;
1045	coroapi.transfer = api_transfer;	1182	coroapi.transfer = api_transfer;
…		…
1055	HV *hv;	1192	HV *hv;
1056	int i;	1193	int i;
1057		1194
1058	Newz (0, coro, 1, struct coro);	1195	Newz (0, coro, 1, struct coro);
1059	coro->args = newAV ();	1196	coro->args = newAV ();
		1197	coro->save = CORO_SAVE_DEF;
1060	coro->flags = CF_NEW;	1198	coro->flags = CF_NEW;
1061		1199
1062	hv = newHV ();	1200	hv = newHV ();
1063	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1201	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1064	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1202	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1065		1203
1066	for (i = 1; i < items; i++)	1204	for (i = 1; i < items; i++)
1067	av_push (coro->args, newSVsv (ST (i)));	1205	av_push (coro->args, newSVsv (ST (i)));
1068	}	1206	}
1069	OUTPUT:	1207	OUTPUT:
		1208	RETVAL
		1209
		1210	int
		1211	save (SV *coro, int new_save = -1)
		1212	CODE:
		1213	RETVAL = api_save (coro, new_save);
		1214	OUTPUT:
		1215	RETVAL
		1216
		1217	int
		1218	save_also (SV *coro_sv, int save_also)
		1219	CODE:
		1220	{
		1221	struct coro *coro = SvSTATE (coro_sv);
		1222	RETVAL = coro->save;
		1223	coro->save |= save_also;
		1224	}
		1225	OUTPUT:
1070	RETVAL	1226	RETVAL
1071		1227
1072	void	1228	void
1073	_set_stacklevel (...)	1229	_set_stacklevel (...)
1074	ALIAS:	1230	ALIAS:
1075	Coro::State::transfer = 1	1231	Coro::State::transfer = 1
1076	Coro::schedule = 2	1232	Coro::schedule = 2
1077	Coro::cede = 3	1233	Coro::cede = 3
		1234	Coro::cede_notself = 4
1078	CODE:	1235	CODE:
1079	{	1236	{
1080	struct transfer_args ta;	1237	struct transfer_args ta;
1081		1238
1082	switch (ix)	1239	switch (ix)
1083	{	1240	{
1084	case 0:	1241	case 0:
1085	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1242	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1086	ta.next = 0;	1243	ta.next = 0;
1087	ta.flags = TRANSFER_SET_STACKLEVEL;
1088	break;	1244	break;
1089		1245
1090	case 1:	1246	case 1:
1091	if (items != 3)	1247	if (items != 2)
1092	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);	1248	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1093		1249
1094	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1250	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1095	break;	1251	break;
1096		1252
1097	case 2:	1253	case 2:
1098	prepare_schedule (&ta);	1254	prepare_schedule (aTHX_ &ta);
1099	break;	1255	break;
1100		1256
1101	case 3:	1257	case 3:
1102	prepare_cede (&ta);	1258	prepare_cede (aTHX_ &ta);
		1259	break;
		1260
		1261	case 4:
		1262	if (!prepare_cede_notself (aTHX_ &ta))
		1263	XSRETURN_EMPTY;
		1264
1103	break;	1265	break;
1104	}	1266	}
1105		1267
		1268	BARRIER;
1106	TRANSFER (ta);	1269	TRANSFER (ta);
1107	}
1108		1270
1109	void	1271	if (GIMME_V != G_VOID && ta.next != ta.prev)
1110	_clone_state_from (SV *dst, SV *src)	1272	XSRETURN_YES;
		1273	}
		1274
		1275	bool
		1276	_destroy (SV *coro_sv)
1111	CODE:	1277	CODE:
1112	{	1278	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1113	struct coro *coro_src = SvSTATE (src);	1279	OUTPUT:
1114		1280	RETVAL
1115	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1116
1117	++coro_src->refcnt;
1118	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1119	}
1120		1281
1121	void	1282	void
1122	_exit (code)	1283	_exit (code)
1123	int code	1284	int code
1124	PROTOTYPE: $	1285	PROTOTYPE: $
1125	CODE:	1286	CODE:
1126	_exit (code);	1287	_exit (code);
1127		1288
1128	int	1289	int
		1290	cctx_stacksize (int new_stacksize = 0)
		1291	CODE:
		1292	RETVAL = coro_stacksize;
		1293	if (new_stacksize)
		1294	coro_stacksize = new_stacksize;
		1295	OUTPUT:
		1296	RETVAL
		1297
		1298	int
1129	cctx_count ()	1299	cctx_count ()
1130	CODE:	1300	CODE:
1131	RETVAL = cctx_count;	1301	RETVAL = cctx_count;
1132	OUTPUT:	1302	OUTPUT:
1133	RETVAL	1303	RETVAL
…		…
1161	coro_ready[i] = newAV ();	1331	coro_ready[i] = newAV ();
1162		1332
1163	{	1333	{
1164	SV *sv = perl_get_sv("Coro::API", 1);	1334	SV *sv = perl_get_sv("Coro::API", 1);
1165		1335
1166	coroapi.schedule = api_schedule;	1336	coroapi.schedule = api_schedule;
		1337	coroapi.save = api_save;
1167	coroapi.cede = api_cede;	1338	coroapi.cede = api_cede;
		1339	coroapi.cede_notself = api_cede_notself;
1168	coroapi.ready = api_ready;	1340	coroapi.ready = api_ready;
1169	coroapi.is_ready = api_is_ready;	1341	coroapi.is_ready = api_is_ready;
1170	coroapi.nready = &coro_nready;	1342	coroapi.nready = &coro_nready;
1171	coroapi.current = coro_current;	1343	coroapi.current = coro_current;
1172		1344
1173	GCoroAPI = &coroapi;	1345	GCoroAPI = &coroapi;
1174	sv_setiv (sv, (IV)&coroapi);	1346	sv_setiv (sv, (IV)&coroapi);
1175	SvREADONLY_on (sv);	1347	SvREADONLY_on (sv);
1176	}	1348	}
1177	}	1349	}
		1350
		1351	void
		1352	_set_current (SV *current)
		1353	PROTOTYPE: $
		1354	CODE:
		1355	SvREFCNT_dec (SvRV (coro_current));
		1356	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1178		1357
1179	int	1358	int
1180	prio (Coro::State coro, int newprio = 0)	1359	prio (Coro::State coro, int newprio = 0)
1181	ALIAS:	1360	ALIAS:
1182	nice = 1	1361	nice = 1
…		…
1185	RETVAL = coro->prio;	1364	RETVAL = coro->prio;
1186		1365
1187	if (items > 1)	1366	if (items > 1)
1188	{	1367	{
1189	if (ix)	1368	if (ix)
1190	newprio += coro->prio;	1369	newprio = coro->prio - newprio;
1191		1370
1192	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1371	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1193	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1372	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1194		1373
1195	coro->prio = newprio;	1374	coro->prio = newprio;
1196	}	1375	}
1197	}	1376	}
		1377	OUTPUT:
		1378	RETVAL
1198		1379
1199	SV *	1380	SV *
1200	ready (SV *self)	1381	ready (SV *self)
1201	PROTOTYPE: $	1382	PROTOTYPE: $
1202	CODE:	1383	CODE:
…		…
1218	CODE:	1399	CODE:
1219	RETVAL = coro_nready;	1400	RETVAL = coro_nready;
1220	OUTPUT:	1401	OUTPUT:
1221	RETVAL	1402	RETVAL
1222		1403
1223	void
1224	_set_current (SV *current)
1225	PROTOTYPE: $
1226	CODE:
1227	SvREFCNT_dec (SvRV (coro_current));
1228	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1229
1230	MODULE = Coro::State PACKAGE = Coro::AIO	1404	MODULE = Coro::State PACKAGE = Coro::AIO
1231		1405
1232	SV *	1406	SV *
1233	_get_state ()	1407	_get_state ()
1234	CODE:	1408	CODE:
1235	{	1409	{
1236	struct {	1410	struct io_state *data;
1237	int errorno;
1238	int laststype;
1239	int laststatval;
1240	Stat_t statcache;
1241	} data;
1242		1411
		1412	RETVAL = newSV (sizeof (struct io_state));
		1413	data = (struct io_state *)SvPVX (RETVAL);
		1414	SvCUR_set (RETVAL, sizeof (struct io_state));
		1415	SvPOK_only (RETVAL);
		1416
1243	data.errorno = errno;	1417	data->errorno = errno;
1244	data.laststype = PL_laststype;	1418	data->laststype = PL_laststype;
1245	data.laststatval = PL_laststatval;	1419	data->laststatval = PL_laststatval;
1246	data.statcache = PL_statcache;	1420	data->statcache = PL_statcache;
1247
1248	RETVAL = newSVpvn ((char *)&data, sizeof data);
1249	}	1421	}
1250	OUTPUT:	1422	OUTPUT:
1251	RETVAL	1423	RETVAL
1252		1424
1253	void	1425	void
1254	_set_state (char *data_)	1426	_set_state (char *data_)
1255	PROTOTYPE: $	1427	PROTOTYPE: $
1256	CODE:	1428	CODE:
1257	{	1429	{
1258	struct {	1430	struct io_state *data = (void *)data_;
1259	int errorno;
1260	int laststype;
1261	int laststatval;
1262	Stat_t statcache;
1263	} *data = (void *)data_;
1264		1431
1265	errno = data->errorno;	1432	errno = data->errorno;
1266	PL_laststype = data->laststype;	1433	PL_laststype = data->laststype;
1267	PL_laststatval = data->laststatval;	1434	PL_laststatval = data->laststatval;
1268	PL_statcache = data->statcache;	1435	PL_statcache = data->statcache;
1269	}	1436	}
		1437

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