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Comparing Coro/Coro/State.xs (file contents):
Revision 1.108 by root, Mon Nov 27 18:15:47 2006 UTC vs.
Revision 1.141 by root, Mon Jan 22 18:45:17 2007 UTC

…		…
4	#include "perl.h"	4	#include "perl.h"
5	#include "XSUB.h"	5	#include "XSUB.h"
6		6
7	#include "patchlevel.h"	7	#include "patchlevel.h"
8		8
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \
15	|| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \
17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19	#if !PERL_VERSION_ATLEAST (5,6,0)
20	# ifndef PL_ppaddr
21	# define PL_ppaddr ppaddr
22	# endif
23	# ifndef call_sv
24	# define call_sv perl_call_sv
25	# endif
26	# ifndef get_sv
27	# define get_sv perl_get_sv
28	# endif
29	# ifndef get_cv
30	# define get_cv perl_get_cv
31	# endif
32	# ifndef IS_PADGV
33	# define IS_PADGV(v) 0
34	# endif
35	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0
37	# endif
38	#endif
39
40	#include <stdio.h>	9	#include <stdio.h>
41	#include <errno.h>	10	#include <errno.h>
42		11	#include <assert.h>
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44	# undef STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50		12
51	#ifdef HAVE_MMAP	13	#ifdef HAVE_MMAP
52	# include <unistd.h>	14	# include <unistd.h>
53	# include <sys/mman.h>	15	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	16	# ifndef MAP_ANONYMOUS
…		…
69	#else	31	#else
70	# define PAGESIZE 0	32	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	33	# define BOOT_PAGESIZE (void)0
72	#endif	34	#endif
73		35
		36	#if USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		39	#else
		40	# define REGISTER_STACK(cctx,start,end)
		41	#endif
		42
		43	/* the maximum number of idle cctx that will be pooled */
		44	#define MAX_IDLE_CCTX 8
		45
		46	#define PERL_VERSION_ATLEAST(a,b,c) \
		47	(PERL_REVISION > (a) \
		48	|| (PERL_REVISION == (a) \
		49	&& (PERL_VERSION > (b) \
		50	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		51
		52	#if !PERL_VERSION_ATLEAST (5,6,0)
		53	# ifndef PL_ppaddr
		54	# define PL_ppaddr ppaddr
		55	# endif
		56	# ifndef call_sv
		57	# define call_sv perl_call_sv
		58	# endif
		59	# ifndef get_sv
		60	# define get_sv perl_get_sv
		61	# endif
		62	# ifndef get_cv
		63	# define get_cv perl_get_cv
		64	# endif
		65	# ifndef IS_PADGV
		66	# define IS_PADGV(v) 0
		67	# endif
		68	# ifndef IS_PADCONST
		69	# define IS_PADCONST(v) 0
		70	# endif
		71	#endif
		72
		73	/* 5.8.7 */
		74	#ifndef SvRV_set
		75	# define SvRV_set(s,v) SvRV(s) = (v)
		76	#endif
		77
		78	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		79	# undef STACKGUARD
		80	#endif
		81
		82	#ifndef STACKGUARD
		83	# define STACKGUARD 0
		84	#endif
		85
		86	/* prefer perl internal functions over our own? */
		87	#ifndef PREFER_PERL_FUNCTIONS
		88	# define PREFER_PERL_FUNCTIONS 0
		89	#endif
		90
74	/* The next macro should declare a variable stacklevel that contains and approximation	91	/* The next macro should declare a variable stacklevel that contains and approximation
75	* to the current C stack pointer. Its property is that it changes with each call	92	* to the current C stack pointer. Its property is that it changes with each call
76	* and should be unique. */	93	* and should be unique. */
77	#define dSTACKLEVEL int stacklevel	94	#define dSTACKLEVEL int stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	95	#define STACKLEVEL ((void *)&stacklevel)
79		96
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	97	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		98
82	#if __GNUC__ >= 3	99	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	100	# define attribute(x) __attribute__(x)
		101	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
84	#else	102	#else
85	# define attribute(x)	103	# define attribute(x)
		104	# define BARRIER
86	#endif	105	#endif
87		106
88	#define NOINLINE attribute ((noinline))	107	#define NOINLINE attribute ((noinline))
89		108
90	#include "CoroAPI.h"	109	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		110
94	#ifdef USE_ITHREADS	111	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	112	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	113	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	114	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	115	#else
99	# define LOCK (void)0	116	# define LOCK (void)0
100	# define UNLOCK (void)0	117	# define UNLOCK (void)0
101	#endif	118	#endif
102		119
		120	/* helper storage struct for Coro::AIO */
		121	struct io_state
		122	{
		123	int errorno;
		124	I32 laststype;
		125	int laststatval;
		126	Stat_t statcache;
		127	};
		128
103	static struct CoroAPI coroapi;	129	static struct CoroAPI coroapi;
104	static AV *main_mainstack; /* used to differentiate between $main and others */	130	static AV *main_mainstack; /* used to differentiate between $main and others */
105	static HV *coro_state_stash, *coro_stash;	131	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	132	static SV *coro_mortal; /* will be freed after next transfer */
107		133
…		…
112	typedef struct coro_cctx {	138	typedef struct coro_cctx {
113	struct coro_cctx *next;	139	struct coro_cctx *next;
114		140
115	/* the stack */	141	/* the stack */
116	void *sptr;	142	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	143	ssize_t ssize; /* positive == mmap, otherwise malloc */
118		144
119	/* cpu state */	145	/* cpu state */
120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	146	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		147	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	148	JMPENV *top_env;
122	coro_context cctx;	149	coro_context cctx;
123		150
		151	int inuse;
		152
124	#if USE_VALGRIND	153	#if USE_VALGRIND
125	int valgrind_id;	154	int valgrind_id;
126	#endif	155	#endif
127	} coro_cctx;	156	} coro_cctx;
		157
		158	enum {
		159	CF_RUNNING = 0x0001, /* coroutine is running */
		160	CF_READY = 0x0002, /* coroutine is ready */
		161	CF_NEW = 0x0004, /* has never been switched to */
		162	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		163	};
128		164
129	/* this is a structure representing a perl-level coroutine */	165	/* this is a structure representing a perl-level coroutine */
130	struct coro {	166	struct coro {
131	/* the c coroutine allocated to this perl coroutine, if any */	167	/* the c coroutine allocated to this perl coroutine, if any */
132	coro_cctx *cctx;	168	coro_cctx *cctx;
133		169
134	/* data associated with this coroutine (initial args) */	170	/* data associated with this coroutine (initial args) */
135	AV *args;	171	AV *args;
136	int refcnt;	172	int refcnt;
		173	int save; /* CORO_SAVE flags */
		174	int flags; /* CF_ flags */
137		175
138	/* optionally saved, might be zero */	176	/* optionally saved, might be zero */
139	AV *defav;	177	AV *defav; /* @_ */
140	SV *defsv;	178	SV *defsv; /* $_ */
141	SV *errsv;	179	SV *errsv; /* $@ */
		180	SV *irssv; /* $/ */
		181	SV *irssv_sv; /* real $/ cache */
142		182
143	#define VAR(name,type) type name;	183	#define VAR(name,type) type name;
144	# include "state.h"	184	# include "state.h"
145	#undef VAR	185	#undef VAR
146		186
…		…
148	int prio;	188	int prio;
149	};	189	};
150		190
151	typedef struct coro *Coro__State;	191	typedef struct coro *Coro__State;
152	typedef struct coro *Coro__State_or_hashref;	192	typedef struct coro *Coro__State_or_hashref;
		193
		194	/** Coro ********************************************************************/
		195
		196	#define PRIO_MAX 3
		197	#define PRIO_HIGH 1
		198	#define PRIO_NORMAL 0
		199	#define PRIO_LOW -1
		200	#define PRIO_IDLE -3
		201	#define PRIO_MIN -4
		202
		203	/* for Coro.pm */
		204	static SV *coro_current;
		205	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		206	static int coro_nready;
		207
		208	/** lowlevel stuff **********************************************************/
153		209
154	static AV *	210	static AV *
155	coro_clone_padlist (CV *cv)	211	coro_clone_padlist (CV *cv)
156	{	212	{
157	AV *padlist = CvPADLIST (cv);	213	AV *padlist = CvPADLIST (cv);
…		…
214		270
215	#define PERL_MAGIC_coro PERL_MAGIC_ext	271	#define PERL_MAGIC_coro PERL_MAGIC_ext
216		272
217	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	273	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
218		274
		275	#define CORO_MAGIC(cv) \
		276	SvMAGIC (cv) \
		277	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		278	? SvMAGIC (cv) \
		279	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		280	: 0
		281
219	/* the next two functions merely cache the padlists */	282	/* the next two functions merely cache the padlists */
220	static void	283	static void
221	get_padlist (CV *cv)	284	get_padlist (CV *cv)
222	{	285	{
223	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	286	MAGIC *mg = CORO_MAGIC (cv);
		287	AV *av;
224		288
225	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	289	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
226	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	290	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
227	else	291	else
228	{	292	{
229	#if 0	293	#if PREFER_PERL_FUNCTIONS
230	/* this is probably cleaner, but also slower? */	294	/* this is probably cleaner, but also slower? */
231	CV *cp = Perl_cv_clone (cv);	295	CV *cp = Perl_cv_clone (cv);
232	CvPADLIST (cv) = CvPADLIST (cp);	296	CvPADLIST (cv) = CvPADLIST (cp);
233	CvPADLIST (cp) = 0;	297	CvPADLIST (cp) = 0;
234	SvREFCNT_dec (cp);	298	SvREFCNT_dec (cp);
…		…
239	}	303	}
240		304
241	static void	305	static void
242	put_padlist (CV *cv)	306	put_padlist (CV *cv)
243	{	307	{
244	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	308	MAGIC *mg = CORO_MAGIC (cv);
		309	AV *av;
245		310
246	if (!mg)	311	if (!mg)
247	{	312	{
248	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	313	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
249	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	314	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
250	mg->mg_virtual = &vtbl_coro;	315	mg->mg_virtual = &vtbl_coro;
251	mg->mg_obj = (SV *)newAV ();	316	mg->mg_obj = (SV *)newAV ();
252	}	317	}
253		318
254	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	319	av = (AV *)mg->mg_obj;
		320
		321	if (AvFILLp (av) >= AvMAX (av))
		322	av_extend (av, AvMAX (av) + 1);
		323
		324	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
255	}	325	}
		326
		327	/** load & save, init *******************************************************/
256		328
257	#define SB do {	329	#define SB do {
258	#define SE } while (0)	330	#define SE } while (0)
259		331
260	#define LOAD(state) load_state((state));
261	#define SAVE(state,flags) save_state((state),(flags));
262
263	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	332	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
264		333
265	static void	334	static void
266	load_state(Coro__State c)	335	load_perl (Coro__State c)
267	{	336	{
268	#define VAR(name,type) PL_ ## name = c->name;	337	#define VAR(name,type) PL_ ## name = c->name;
269	# include "state.h"	338	# include "state.h"
270	#undef VAR	339	#undef VAR
271		340
272	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	341	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
273	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	342	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
274	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	343	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		344	if (c->irssv)
		345	{
		346	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		347	SvREFCNT_dec (c->irssv);
		348	else
		349	{
		350	REPLACE_SV (PL_rs, c->irssv);
		351	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		352	sv_setsv (c->irssv_sv, PL_rs);
		353	}
		354	}
275		355
276	{	356	{
277	dSP;	357	dSP;
278	CV *cv;	358	CV *cv;
279		359
280	/* now do the ugly restore mess */	360	/* now do the ugly restore mess */
281	while ((cv = (CV *)POPs))	361	while ((cv = (CV *)POPs))
282	{	362	{
283	AV *padlist = (AV *)POPs;
284
285	if (padlist)
286	{
287	put_padlist (cv); /* mark this padlist as available */	363	put_padlist (cv); /* mark this padlist as available */
288	CvPADLIST(cv) = padlist;	364	CvDEPTH (cv) = PTR2IV (POPs);
289	}	365	CvPADLIST (cv) = (AV *)POPs;
290
291	++CvDEPTH(cv);
292	}	366	}
293		367
294	PUTBACK;	368	PUTBACK;
295	}	369	}
296	}	370	}
297		371
298	static void	372	static void
299	save_state(Coro__State c, int flags)	373	save_perl (Coro__State c)
300	{	374	{
301	{	375	{
302	dSP;	376	dSP;
303	I32 cxix = cxstack_ix;	377	I32 cxix = cxstack_ix;
304	PERL_CONTEXT *ccstk = cxstack;	378	PERL_CONTEXT *ccstk = cxstack;
…		…
307	/*	381	/*
308	* the worst thing you can imagine happens first - we have to save	382	* the worst thing you can imagine happens first - we have to save
309	* (and reinitialize) all cv's in the whole callchain :(	383	* (and reinitialize) all cv's in the whole callchain :(
310	*/	384	*/
311		385
		386	EXTEND (SP, 3 + 1);
312	PUSHs (Nullsv);	387	PUSHs (Nullsv);
313	/* this loop was inspired by pp_caller */	388	/* this loop was inspired by pp_caller */
314	for (;;)	389	for (;;)
315	{	390	{
316	while (cxix >= 0)	391	while (cxix >= 0)
317	{	392	{
318	PERL_CONTEXT *cx = &ccstk[cxix--];	393	PERL_CONTEXT *cx = &ccstk[cxix--];
319		394
320	if (CxTYPE(cx) == CXt_SUB)	395	if (CxTYPE (cx) == CXt_SUB)
321	{	396	{
322	CV *cv = cx->blk_sub.cv;	397	CV *cv = cx->blk_sub.cv;
		398
323	if (CvDEPTH(cv))	399	if (CvDEPTH (cv))
324	{	400	{
325	EXTEND (SP, CvDEPTH(cv)*2);	401	EXTEND (SP, 3);
326
327	while (--CvDEPTH(cv))
328	{
329	/* this tells the restore code to increment CvDEPTH */
330	PUSHs (Nullsv);
331	PUSHs ((SV *)cv);
332	}
333
334	PUSHs ((SV *)CvPADLIST(cv));	402	PUSHs ((SV *)CvPADLIST (cv));
		403	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
335	PUSHs ((SV *)cv);	404	PUSHs ((SV *)cv);
336		405
		406	CvDEPTH (cv) = 0;
337	get_padlist (cv);	407	get_padlist (cv);
338	}	408	}
339	}	409	}
340	#ifdef CXt_FORMAT
341	else if (CxTYPE(cx) == CXt_FORMAT)
342	{
343	/* I never used formats, so how should I know how these are implemented? */
344	/* my bold guess is as a simple, plain sub... */
345	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
346	}
347	#endif
348	}	410	}
349		411
350	if (top_si->si_type == PERLSI_MAIN)	412	if (top_si->si_type == PERLSI_MAIN)
351	break;	413	break;
352		414
…		…
356	}	418	}
357		419
358	PUTBACK;	420	PUTBACK;
359	}	421	}
360		422
361	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	423	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
362	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	424	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
363	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	425	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		426	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
364		427
365	#define VAR(name,type)c->name = PL_ ## name;	428	#define VAR(name,type)c->name = PL_ ## name;
366	# include "state.h"	429	# include "state.h"
367	#undef VAR	430	#undef VAR
368	}	431	}
…		…
371	* allocate various perl stacks. This is an exact copy	434	* allocate various perl stacks. This is an exact copy
372	* of perl.c:init_stacks, except that it uses less memory	435	* of perl.c:init_stacks, except that it uses less memory
373	* on the (sometimes correct) assumption that coroutines do	436	* on the (sometimes correct) assumption that coroutines do
374	* not usually need a lot of stackspace.	437	* not usually need a lot of stackspace.
375	*/	438	*/
		439	#if PREFER_PERL_FUNCTIONS
		440	# define coro_init_stacks init_stacks
		441	#else
376	static void	442	static void
377	coro_init_stacks ()	443	coro_init_stacks ()
378	{	444	{
379	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	445	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
380	PL_curstackinfo->si_type = PERLSI_MAIN;	446	PL_curstackinfo->si_type = PERLSI_MAIN;
381	PL_curstack = PL_curstackinfo->si_stack;	447	PL_curstack = PL_curstackinfo->si_stack;
382	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	448	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
383		449
384	PL_stack_base = AvARRAY(PL_curstack);	450	PL_stack_base = AvARRAY(PL_curstack);
385	PL_stack_sp = PL_stack_base;	451	PL_stack_sp = PL_stack_base;
386	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	452	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
387		453
388	New(50,PL_tmps_stack,96,SV*);	454	New(50,PL_tmps_stack,128,SV*);
389	PL_tmps_floor = -1;	455	PL_tmps_floor = -1;
390	PL_tmps_ix = -1;	456	PL_tmps_ix = -1;
391	PL_tmps_max = 96;	457	PL_tmps_max = 128;
392		458
393	New(54,PL_markstack,16,I32);	459	New(54,PL_markstack,32,I32);
394	PL_markstack_ptr = PL_markstack;	460	PL_markstack_ptr = PL_markstack;
395	PL_markstack_max = PL_markstack + 16;	461	PL_markstack_max = PL_markstack + 32;
396		462
397	#ifdef SET_MARK_OFFSET	463	#ifdef SET_MARK_OFFSET
398	SET_MARK_OFFSET;	464	SET_MARK_OFFSET;
399	#endif	465	#endif
400		466
401	New(54,PL_scopestack,16,I32);	467	New(54,PL_scopestack,32,I32);
402	PL_scopestack_ix = 0;	468	PL_scopestack_ix = 0;
403	PL_scopestack_max = 16;	469	PL_scopestack_max = 32;
404		470
405	New(54,PL_savestack,96,ANY);	471	New(54,PL_savestack,64,ANY);
406	PL_savestack_ix = 0;	472	PL_savestack_ix = 0;
407	PL_savestack_max = 96;	473	PL_savestack_max = 64;
408		474
409	#if !PERL_VERSION_ATLEAST (5,9,0)	475	#if !PERL_VERSION_ATLEAST (5,9,0)
410	New(54,PL_retstack,8,OP*);	476	New(54,PL_retstack,16,OP*);
411	PL_retstack_ix = 0;	477	PL_retstack_ix = 0;
412	PL_retstack_max = 8;	478	PL_retstack_max = 16;
413	#endif	479	#endif
414	}	480	}
		481	#endif
415		482
416	/*	483	/*
417	* destroy the stacks, the callchain etc...	484	* destroy the stacks, the callchain etc...
418	*/	485	*/
419	static void	486	static void
420	coro_destroy_stacks ()	487	coro_destroy_stacks ()
421	{	488	{
422	if (!IN_DESTRUCT)	489	if (!IN_DESTRUCT)
423	{	490	{
424	/* is this ugly, I ask? */	491	/* restore all saved variables and stuff */
425	LEAVE_SCOPE (0);	492	LEAVE_SCOPE (0);
		493	assert (PL_tmps_floor == -1);
426		494
427	/* sure it is, but more important: is it correct?? :/ */	495	/* free all temporaries */
428	FREETMPS;	496	FREETMPS;
		497	assert (PL_tmps_ix == -1);
429		498
		499	/* unwind all extra stacks */
430	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	500	POPSTACK_TO (PL_mainstack);
		501
		502	/* unwind main stack */
		503	dounwind (-1);
431	}	504	}
432		505
433	while (PL_curstackinfo->si_next)	506	while (PL_curstackinfo->si_next)
434	PL_curstackinfo = PL_curstackinfo->si_next;	507	PL_curstackinfo = PL_curstackinfo->si_next;
435		508
436	while (PL_curstackinfo)	509	while (PL_curstackinfo)
437	{	510	{
438	PERL_SI *p = PL_curstackinfo->si_prev;	511	PERL_SI *p = PL_curstackinfo->si_prev;
439		512
440	{ /*D*//*remove*/
441	dSP;
442	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
443	PUTBACK; /* possibly superfluous */
444	}
445
446	if (!IN_DESTRUCT)	513	if (!IN_DESTRUCT)
447	{
448	dounwind (-1);/*D*//*remove*/
449	SvREFCNT_dec (PL_curstackinfo->si_stack);	514	SvREFCNT_dec (PL_curstackinfo->si_stack);
450	}
451		515
452	Safefree (PL_curstackinfo->si_cxstack);	516	Safefree (PL_curstackinfo->si_cxstack);
453	Safefree (PL_curstackinfo);	517	Safefree (PL_curstackinfo);
454	PL_curstackinfo = p;	518	PL_curstackinfo = p;
455	}	519	}
…		…
461	#if !PERL_VERSION_ATLEAST (5,9,0)	525	#if !PERL_VERSION_ATLEAST (5,9,0)
462	Safefree (PL_retstack);	526	Safefree (PL_retstack);
463	#endif	527	#endif
464	}	528	}
465		529
		530	/** coroutine stack handling ************************************************/
		531
466	static void	532	static void
467	setup_coro (struct coro *coro)	533	setup_coro (struct coro *coro)
468	{	534	{
469	/*	535	/*
470	* emulate part of the perl startup here.	536	* emulate part of the perl startup here.
471	*/	537	*/
472		538
473	coro_init_stacks ();	539	coro_init_stacks ();
474		540
475	PL_curcop = 0;	541	PL_curcop = &PL_compiling;
476	PL_in_eval = 0;	542	PL_in_eval = EVAL_NULL;
477	PL_curpm = 0;	543	PL_curpm = 0;
		544	PL_localizing = 0;
		545	PL_dirty = 0;
		546	PL_restartop = 0;
478		547
479	{	548	{
480	dSP;	549	dSP;
481	LOGOP myop;	550	LOGOP myop;
482		551
483	/* I have no idea why this is needed, but it is */
484	PUSHMARK (SP);
485
486	SvREFCNT_dec (GvAV (PL_defgv));	552	SvREFCNT_dec (GvAV (PL_defgv));
487	GvAV (PL_defgv) = coro->args; coro->args = 0;	553	GvAV (PL_defgv) = coro->args; coro->args = 0;
488		554
489	Zero (&myop, 1, LOGOP);	555	Zero (&myop, 1, LOGOP);
490	myop.op_next = Nullop;	556	myop.op_next = Nullop;
491	myop.op_flags = OPf_WANT_VOID;	557	myop.op_flags = OPf_WANT_VOID;
492		558
493	PL_op = (OP *)&myop;
494
495	PUSHMARK (SP);	559	PUSHMARK (SP);
496	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	560	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
497	PUTBACK;	561	PUTBACK;
		562	PL_op = (OP *)&myop;
498	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	563	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
499	SPAGAIN;	564	SPAGAIN;
500
501	ENTER; /* necessary e.g. for dounwind */
502	}	565	}
		566
		567	ENTER; /* necessary e.g. for dounwind */
503	}	568	}
504		569
505	static void	570	static void
506	free_coro_mortal ()	571	free_coro_mortal ()
507	{	572	{
…		…
510	SvREFCNT_dec (coro_mortal);	575	SvREFCNT_dec (coro_mortal);
511	coro_mortal = 0;	576	coro_mortal = 0;
512	}	577	}
513	}	578	}
514		579
		580	/* inject a fake call to Coro::State::_cctx_init into the execution */
515	static void NOINLINE	581	static void NOINLINE
516	prepare_cctx (coro_cctx *cctx)	582	prepare_cctx (coro_cctx *cctx)
517	{	583	{
518	dSP;	584	dSP;
519	LOGOP myop;	585	LOGOP myop;
520		586
521	Zero (&myop, 1, LOGOP);	587	Zero (&myop, 1, LOGOP);
522	myop.op_next = PL_op;	588	myop.op_next = PL_op;
523	myop.op_flags = OPf_WANT_VOID;	589	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
524
525	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
526		590
527	PUSHMARK (SP);	591	PUSHMARK (SP);
		592	EXTEND (SP, 2);
		593	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
528	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	594	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
529	PUTBACK;	595	PUTBACK;
		596	PL_op = (OP *)&myop;
530	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	597	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
531	SPAGAIN;	598	SPAGAIN;
532	}	599	}
533		600
534	static void	601	static void
535	coro_run (void *arg)	602	coro_run (void *arg)
536	{	603	{
537	/* coro_run is the alternative epilogue of transfer() */	604	/* coro_run is the alternative tail of transfer(), so unlock here. */
538	UNLOCK;	605	UNLOCK;
539		606
540	/*	607	/*
541	* this is a _very_ stripped down perl interpreter ;)	608	* this is a _very_ stripped down perl interpreter ;)
542	*/	609	*/
…		…
544		611
545	/* inject call to cctx_init */	612	/* inject call to cctx_init */
546	prepare_cctx ((coro_cctx *)arg);	613	prepare_cctx ((coro_cctx *)arg);
547		614
548	/* somebody will hit me for both perl_run and PL_restartop */	615	/* somebody will hit me for both perl_run and PL_restartop */
		616	PL_restartop = PL_op;
549	perl_run (PL_curinterp);	617	perl_run (PL_curinterp);
550		618
551	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	619	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
552	abort ();	620	abort ();
553	}	621	}
…		…
557	{	625	{
558	coro_cctx *cctx;	626	coro_cctx *cctx;
559		627
560	++cctx_count;	628	++cctx_count;
561		629
562	New (0, cctx, 1, coro_cctx);	630	Newz (0, cctx, 1, coro_cctx);
563		631
564	#if HAVE_MMAP	632	#if HAVE_MMAP
565		633
566	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	634	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
567	/* mmap suppsedly does allocate-on-write for us */	635	/* mmap supposedly does allocate-on-write for us */
568	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	636	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
569		637
570	if (cctx->sptr == (void *)-1)	638	if (cctx->sptr != (void *)-1)
571	{
572	perror ("FATAL: unable to mmap stack for coroutine");
573	_exit (EXIT_FAILURE);
574	}	639	{
575
576	# if STACKGUARD	640	# if STACKGUARD
577	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	641	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
578	# endif	642	# endif
579		643	REGISTER_STACK (
580	#else	644	cctx,
581
582	cctx->ssize = STACKSIZE * (long)sizeof (long);
583	New (0, cctx->sptr, STACKSIZE, long);
584
585	if (!cctx->sptr)
586	{
587	perror ("FATAL: unable to malloc stack for coroutine");
588	_exit (EXIT_FAILURE);
589	}
590
591	#endif
592
593	#if USE_VALGRIND
594	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
595	STACKGUARD * PAGESIZE + (char *)cctx->sptr,	645	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
596	cctx->ssize + (char *)cctx->sptr	646	cctx->ssize + (char *)cctx->sptr
597	);	647	);
598	#endif
599		648
600	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	649	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		650	}
		651	else
		652	#endif
		653	{
		654	cctx->ssize = -STACKSIZE * (long)sizeof (long);
		655	New (0, cctx->sptr, STACKSIZE, long);
		656
		657	if (!cctx->sptr)
		658	{
		659	perror ("FATAL: unable to allocate stack for coroutine");
		660	_exit (EXIT_FAILURE);
		661	}
		662
		663	REGISTER_STACK (
		664	cctx,
		665	(char *)cctx->sptr,
		666	(char *)cctx->sptr - cctx->ssize
		667	);
		668
		669	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, -cctx->ssize);
		670	}
601		671
602	return cctx;	672	return cctx;
603	}	673	}
604		674
605	static void	675	static void
606	cctx_free (coro_cctx *cctx)	676	cctx_destroy (coro_cctx *cctx)
607	{	677	{
608	if (!cctx)	678	if (!cctx)
609	return;	679	return;
610		680
611	--cctx_count;	681	--cctx_count;
…		…
613	#if USE_VALGRIND	683	#if USE_VALGRIND
614	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	684	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
615	#endif	685	#endif
616		686
617	#if HAVE_MMAP	687	#if HAVE_MMAP
		688	if (cctx->ssize > 0)
618	munmap (cctx->sptr, cctx->ssize);	689	munmap (cctx->sptr, cctx->ssize);
619	#else	690	else
		691	#endif
620	Safefree (cctx->sptr);	692	Safefree (cctx->sptr);
621	#endif
622		693
623	Safefree (cctx);	694	Safefree (cctx);
624	}	695	}
625		696
626	static coro_cctx *	697	static coro_cctx *
…		…
628	{	699	{
629	coro_cctx *cctx;	700	coro_cctx *cctx;
630		701
631	if (cctx_first)	702	if (cctx_first)
632	{	703	{
633	--cctx_idle;
634	cctx = cctx_first;	704	cctx = cctx_first;
635	cctx_first = cctx->next;	705	cctx_first = cctx->next;
		706	--cctx_idle;
636	}	707	}
637	else	708	else
638	{	709	{
639	cctx = cctx_new ();	710	cctx = cctx_new ();
640	PL_op = PL_op->op_next;	711	PL_op = PL_op->op_next;
…		…
644	}	715	}
645		716
646	static void	717	static void
647	cctx_put (coro_cctx *cctx)	718	cctx_put (coro_cctx *cctx)
648	{	719	{
		720	/* free another cctx if overlimit */
		721	if (cctx_idle >= MAX_IDLE_CCTX)
		722	{
		723	coro_cctx *first = cctx_first;
		724	cctx_first = first->next;
		725	--cctx_idle;
		726
		727	assert (!first->inuse);
		728	cctx_destroy (first);
		729	}
		730
649	++cctx_idle;	731	++cctx_idle;
650	cctx->next = cctx_first;	732	cctx->next = cctx_first;
651	cctx_first = cctx;	733	cctx_first = cctx;
652	}	734	}
653		735
		736	/** coroutine switching *****************************************************/
		737
654	/* never call directly, always through the coro_state_transfer global variable */	738	/* never call directly, always through the coro_state_transfer global variable */
655	static void NOINLINE	739	static void NOINLINE
656	transfer (struct coro *prev, struct coro *next, int flags)	740	transfer (struct coro *prev, struct coro *next)
657	{	741	{
658	dSTACKLEVEL;	742	dSTACKLEVEL;
659		743
660	/* sometimes transfer is only called to set idle_sp */	744	/* sometimes transfer is only called to set idle_sp */
661	if (flags == TRANSFER_SET_STACKLEVEL)	745	if (!next)
		746	{
662	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	747	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		748	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		749	}
663	else if (prev != next)	750	else if (prev != next)
664	{	751	{
665	coro_cctx *prev__cctx;	752	coro_cctx *prev__cctx;
666		753
		754	if (prev->flags & CF_NEW)
		755	{
		756	/* create a new empty context */
		757	Newz (0, prev->cctx, 1, coro_cctx);
		758	prev->cctx->inuse = 1;
		759	prev->flags &= ~CF_NEW;
		760	prev->flags |= CF_RUNNING;
		761	}
		762
		763	/*TODO: must not croak here */
		764	if (!prev->flags & CF_RUNNING)
		765	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		766
		767	if (next->flags & CF_RUNNING)
		768	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		769
		770	if (next->flags & CF_DESTROYED)
		771	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		772
		773	prev->flags &= ~CF_RUNNING;
		774	next->flags |= CF_RUNNING;
		775
667	LOCK;	776	LOCK;
668		777
669	if (next->mainstack)	778	if (next->flags & CF_NEW)
670	{	779	{
671	/* coroutine already started */	780	/* need to start coroutine */
672	SAVE (prev, flags);	781	next->flags &= ~CF_NEW;
673	LOAD (next);	782	/* first get rid of the old state */
		783	save_perl (prev);
		784	/* setup coroutine call */
		785	setup_coro (next);
		786	/* need a new stack */
		787	assert (!next->cctx);
674	}	788	}
675	else	789	else
676	{	790	{
677	/* need to start coroutine */	791	/* coroutine already started */
678	/* first get rid of the old state */	792	save_perl (prev);
679	SAVE (prev, -1);	793	load_perl (next);
680	/* setup coroutine call */
681	setup_coro (next);
682	/* need a stack */
683	next->cctx = 0;
684	}	794	}
685
686	if (!prev->cctx)
687	/* create a new empty context */
688	Newz (0, prev->cctx, 1, coro_cctx);
689		795
690	prev__cctx = prev->cctx;	796	prev__cctx = prev->cctx;
691		797
692	/* possibly "free" the cctx */	798	/* possibly "free" the cctx */
693	if (prev__cctx->idle_sp == STACKLEVEL)	799	if (prev__cctx->idle_sp == STACKLEVEL)
694	{	800	{
		801	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		802	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		803
		804	prev->cctx = 0;
		805
695	cctx_put (prev__cctx);	806	cctx_put (prev__cctx);
696	prev->cctx = 0;	807	prev__cctx->inuse = 0;
697	}	808	}
698		809
699	if (!next->cctx)	810	if (!next->cctx)
		811	{
700	next->cctx = cctx_get ();	812	next->cctx = cctx_get ();
		813	assert (!next->cctx->inuse);
		814	next->cctx->inuse = 1;
		815	}
701		816
702	if (prev__cctx != next->cctx)	817	if (prev__cctx != next->cctx)
703	{	818	{
704	prev__cctx->top_env = PL_top_env;	819	prev__cctx->top_env = PL_top_env;
705	PL_top_env = next->cctx->top_env;	820	PL_top_env = next->cctx->top_env;
706	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	821	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
707	}	822	}
708		823
709	free_coro_mortal ();	824	free_coro_mortal ();
710
711	UNLOCK;	825	UNLOCK;
712	}	826	}
713	}	827	}
714		828
715	struct transfer_args	829	struct transfer_args
716	{	830	{
717	struct coro *prev, *next;	831	struct coro *prev, *next;
718	int flags;
719	};	832	};
720		833
721	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	834	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
722		835
		836	/** high level stuff ********************************************************/
		837
723	static void	838	static int
724	coro_state_destroy (struct coro *coro)	839	coro_state_destroy (struct coro *coro)
725	{	840	{
726	if (coro->refcnt--)	841	if (coro->flags & CF_DESTROYED)
727	return;	842	return 0;
		843
		844	coro->flags |= CF_DESTROYED;
		845
		846	if (coro->flags & CF_READY)
		847	{
		848	/* reduce nready, as destroying a ready coro effectively unreadies it */
		849	/* alternative: look through all ready queues and remove the coro */
		850	LOCK;
		851	--coro_nready;
		852	UNLOCK;
		853	}
		854	else
		855	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
728		856
729	if (coro->mainstack && coro->mainstack != main_mainstack)	857	if (coro->mainstack && coro->mainstack != main_mainstack)
730	{	858	{
731	struct coro temp;	859	struct coro temp;
732		860
733	SAVE ((&temp), TRANSFER_SAVE_ALL);	861	assert (!(coro->flags & CF_RUNNING));
734	LOAD (coro);	862
		863	Zero (&temp, 1, struct coro);
		864	temp.save = CORO_SAVE_ALL;
		865
		866	if (coro->flags & CF_RUNNING)
		867	croak ("FATAL: tried to destroy currently running coroutine");
		868
		869	save_perl (&temp);
		870	load_perl (coro);
735		871
736	coro_destroy_stacks ();	872	coro_destroy_stacks ();
737		873
738	LOAD ((&temp)); /* this will get rid of defsv etc.. */	874	load_perl (&temp); /* this will get rid of defsv etc.. */
739		875
740	coro->mainstack = 0;	876	coro->mainstack = 0;
741	}	877	}
742		878
743	cctx_free (coro->cctx);	879	cctx_destroy (coro->cctx);
744	SvREFCNT_dec (coro->args);	880	SvREFCNT_dec (coro->args);
745	Safefree (coro);	881
		882	return 1;
746	}	883	}
747		884
748	static int	885	static int
749	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	886	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
750	{	887	{
751	struct coro *coro = (struct coro *)mg->mg_ptr;	888	struct coro *coro = (struct coro *)mg->mg_ptr;
752	mg->mg_ptr = 0;	889	mg->mg_ptr = 0;
753		890
		891	if (--coro->refcnt < 0)
		892	{
754	coro_state_destroy (coro);	893	coro_state_destroy (coro);
		894	Safefree (coro);
		895	}
755		896
756	return 0;	897	return 0;
757	}	898	}
758		899
759	static int	900	static int
…		…
766	return 0;	907	return 0;
767	}	908	}
768		909
769	static MGVTBL coro_state_vtbl = {	910	static MGVTBL coro_state_vtbl = {
770	0, 0, 0, 0,	911	0, 0, 0, 0,
771	coro_state_clear,	912	coro_state_free,
772	0,	913	0,
773	#ifdef MGf_DUP	914	#ifdef MGf_DUP
774	coro_state_dup,	915	coro_state_dup,
775	#else	916	#else
776	# define MGf_DUP 0	917	# define MGf_DUP 0
…		…
798	assert (mg->mg_type == PERL_MAGIC_ext);	939	assert (mg->mg_type == PERL_MAGIC_ext);
799	return (struct coro *)mg->mg_ptr;	940	return (struct coro *)mg->mg_ptr;
800	}	941	}
801		942
802	static void	943	static void
803	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	944	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
804	{	945	{
805	ta->prev = SvSTATE (prev);	946	ta->prev = SvSTATE (prev_sv);
806	ta->next = SvSTATE (next);	947	ta->next = SvSTATE (next_sv);
807	ta->flags = flags;
808	}	948	}
809		949
810	static void	950	static void
811	api_transfer (SV *prev, SV *next, int flags)	951	api_transfer (SV *prev_sv, SV *next_sv)
812	{	952	{
813	dTHX;
814	struct transfer_args ta;	953	struct transfer_args ta;
815		954
816	prepare_transfer (&ta, prev, next, flags);	955	prepare_transfer (&ta, prev_sv, next_sv);
817	TRANSFER (ta);	956	TRANSFER (ta);
818	}	957	}
819		958
		959	static int
		960	api_save (SV *coro_sv, int new_save)
		961	{
		962	struct coro *coro = SvSTATE (coro_sv);
		963	int old_save = coro->save;
		964
		965	if (new_save >= 0)
		966	coro->save = new_save;
		967
		968	return old_save;
		969	}
		970
820	/** Coro ********************************************************************/	971	/** Coro ********************************************************************/
821		972
822	#define PRIO_MAX 3
823	#define PRIO_HIGH 1
824	#define PRIO_NORMAL 0
825	#define PRIO_LOW -1
826	#define PRIO_IDLE -3
827	#define PRIO_MIN -4
828
829	/* for Coro.pm */
830	static GV *coro_current, *coro_idle;
831	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
832	static int coro_nready;
833
834	static void	973	static void
835	coro_enq (SV *sv)	974	coro_enq (SV *coro_sv)
836	{	975	{
837	int prio;
838
839	if (SvTYPE (sv) != SVt_PVHV)
840	croak ("Coro::ready tried to enqueue something that is not a coroutine");
841
842	prio = SvSTATE (sv)->prio;
843
844	av_push (coro_ready [prio - PRIO_MIN], sv);	976	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
845	coro_nready++;
846	}	977	}
847		978
848	static SV *	979	static SV *
849	coro_deq (int min_prio)	980	coro_deq (int min_prio)
850	{	981	{
…		…
854	if (min_prio < 0)	985	if (min_prio < 0)
855	min_prio = 0;	986	min_prio = 0;
856		987
857	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	988	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
858	if (AvFILLp (coro_ready [prio]) >= 0)	989	if (AvFILLp (coro_ready [prio]) >= 0)
859	{
860	coro_nready--;
861	return av_shift (coro_ready [prio]);	990	return av_shift (coro_ready [prio]);
862	}
863		991
864	return 0;	992	return 0;
865	}	993	}
866		994
867	static void	995	static int
868	api_ready (SV *coro)	996	api_ready (SV *coro_sv)
869	{	997	{
870	dTHX;	998	struct coro *coro;
871		999
872	if (SvROK (coro))	1000	if (SvROK (coro_sv))
873	coro = SvRV (coro);	1001	coro_sv = SvRV (coro_sv);
		1002
		1003	coro = SvSTATE (coro_sv);
		1004
		1005	if (coro->flags & CF_READY)
		1006	return 0;
		1007
		1008	coro->flags |= CF_READY;
874		1009
875	LOCK;	1010	LOCK;
876	coro_enq (SvREFCNT_inc (coro));	1011	coro_enq (SvREFCNT_inc (coro_sv));
		1012	++coro_nready;
877	UNLOCK;	1013	UNLOCK;
		1014
		1015	return 1;
		1016	}
		1017
		1018	static int
		1019	api_is_ready (SV *coro_sv)
		1020	{
		1021	return !!(SvSTATE (coro_sv)->flags & CF_READY);
878	}	1022	}
879		1023
880	static void	1024	static void
881	prepare_schedule (struct transfer_args *ta)	1025	prepare_schedule (struct transfer_args *ta)
882	{	1026	{
883	SV *current, *prev, *next;	1027	SV *prev_sv, *next_sv;
884
885	current = GvSV (coro_current);
886		1028
887	for (;;)	1029	for (;;)
888	{	1030	{
889	LOCK;	1031	LOCK;
890	next = coro_deq (PRIO_MIN);	1032	next_sv = coro_deq (PRIO_MIN);
		1033
		1034	/* nothing to schedule: call the idle handler */
		1035	if (!next_sv)
		1036	{
		1037	dSP;
		1038	UNLOCK;
		1039
		1040	ENTER;
		1041	SAVETMPS;
		1042
		1043	PUSHMARK (SP);
		1044	PUTBACK;
		1045	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1046
		1047	FREETMPS;
		1048	LEAVE;
		1049	continue;
		1050	}
		1051
		1052	ta->next = SvSTATE (next_sv);
		1053
		1054	/* cannot transfer to destroyed coros, skip and look for next */
		1055	if (ta->next->flags & CF_DESTROYED)
		1056	{
		1057	UNLOCK;
		1058	SvREFCNT_dec (next_sv);
		1059	/* coro_nready is already taken care of by destroy */
		1060	continue;
		1061	}
		1062
		1063	--coro_nready;
891	UNLOCK;	1064	UNLOCK;
892
893	if (next)
894	break;	1065	break;
895
896	{
897	dSP;
898
899	ENTER;
900	SAVETMPS;
901
902	PUSHMARK (SP);
903	PUTBACK;
904	call_sv (GvSV (coro_idle), G_DISCARD);
905
906	FREETMPS;
907	LEAVE;
908	}	1066	}
909	}
910
911	prev = SvRV (current);
912	SvRV (current) = next;
913		1067
914	/* free this only after the transfer */	1068	/* free this only after the transfer */
		1069	prev_sv = SvRV (coro_current);
		1070	SvRV_set (coro_current, next_sv);
		1071	ta->prev = SvSTATE (prev_sv);
		1072
		1073	assert (ta->next->flags & CF_READY);
		1074	ta->next->flags &= ~CF_READY;
		1075
915	LOCK;	1076	LOCK;
916	free_coro_mortal ();	1077	free_coro_mortal ();
		1078	coro_mortal = prev_sv;
917	UNLOCK;	1079	UNLOCK;
918	coro_mortal = prev;
919
920	ta->prev = SvSTATE (prev);
921	ta->next = SvSTATE (next);
922	ta->flags = TRANSFER_SAVE_ALL;
923	}	1080	}
924		1081
925	static void	1082	static void
926	prepare_cede (struct transfer_args *ta)	1083	prepare_cede (struct transfer_args *ta)
927	{	1084	{
928	LOCK;	1085	api_ready (coro_current);
929	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
930	UNLOCK;
931
932	prepare_schedule (ta);	1086	prepare_schedule (ta);
933	}	1087	}
934		1088
		1089	static int
		1090	prepare_cede_notself (struct transfer_args *ta)
		1091	{
		1092	if (coro_nready)
		1093	{
		1094	SV *prev = SvRV (coro_current);
		1095	prepare_schedule (ta);
		1096	api_ready (prev);
		1097	return 1;
		1098	}
		1099	else
		1100	return 0;
		1101	}
		1102
935	static void	1103	static void
936	api_schedule (void)	1104	api_schedule (void)
937	{	1105	{
938	dTHX;
939	struct transfer_args ta;	1106	struct transfer_args ta;
940		1107
941	prepare_schedule (&ta);	1108	prepare_schedule (&ta);
942	TRANSFER (ta);	1109	TRANSFER (ta);
943	}	1110	}
944		1111
945	static void	1112	static int
946	api_cede (void)	1113	api_cede (void)
947	{	1114	{
948	dTHX;
949	struct transfer_args ta;	1115	struct transfer_args ta;
950		1116
951	prepare_cede (&ta);	1117	prepare_cede (&ta);
		1118
		1119	if (ta.prev != ta.next)
		1120	{
952	TRANSFER (ta);	1121	TRANSFER (ta);
		1122	return 1;
		1123	}
		1124	else
		1125	return 0;
		1126	}
		1127
		1128	static int
		1129	api_cede_notself (void)
		1130	{
		1131	struct transfer_args ta;
		1132
		1133	if (prepare_cede_notself (&ta))
		1134	{
		1135	TRANSFER (ta);
		1136	return 1;
		1137	}
		1138	else
		1139	return 0;
953	}	1140	}
954		1141
955	MODULE = Coro::State PACKAGE = Coro::State	1142	MODULE = Coro::State PACKAGE = Coro::State
956		1143
957	PROTOTYPES: DISABLE	1144	PROTOTYPES: DISABLE
…		…
963	#endif	1150	#endif
964	BOOT_PAGESIZE;	1151	BOOT_PAGESIZE;
965		1152
966	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1153	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
967		1154
968	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1155	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
969	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1156	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
970	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1157	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1158	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1159	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
971		1160
972	main_mainstack = PL_mainstack;	1161	main_mainstack = PL_mainstack;
973		1162
974	coroapi.ver = CORO_API_VERSION;	1163	coroapi.ver = CORO_API_VERSION;
975	coroapi.transfer = api_transfer;	1164	coroapi.transfer = api_transfer;
…		…
985	HV *hv;	1174	HV *hv;
986	int i;	1175	int i;
987		1176
988	Newz (0, coro, 1, struct coro);	1177	Newz (0, coro, 1, struct coro);
989	coro->args = newAV ();	1178	coro->args = newAV ();
		1179	coro->save = CORO_SAVE_ALL;
		1180	coro->flags = CF_NEW;
990		1181
991	hv = newHV ();	1182	hv = newHV ();
992	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1183	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
993	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1184	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
994		1185
995	for (i = 1; i < items; i++)	1186	for (i = 1; i < items; i++)
996	av_push (coro->args, newSVsv (ST (i)));	1187	av_push (coro->args, newSVsv (ST (i)));
997	}	1188	}
998	OUTPUT:	1189	OUTPUT:
		1190	RETVAL
		1191
		1192	int
		1193	save (SV *coro, int new_save = -1)
		1194	CODE:
		1195	RETVAL = api_save (coro, new_save);
		1196	OUTPUT:
999	RETVAL	1197	RETVAL
1000		1198
1001	void	1199	void
1002	_set_stacklevel (...)	1200	_set_stacklevel (...)
1003	ALIAS:	1201	ALIAS:
1004	Coro::State::transfer = 1	1202	Coro::State::transfer = 1
1005	Coro::schedule = 2	1203	Coro::schedule = 2
1006	Coro::cede = 3	1204	Coro::cede = 3
1007	Coro::Cont::yield = 4	1205	Coro::cede_notself = 4
1008	CODE:	1206	CODE:
1009	{	1207	{
1010	struct transfer_args ta;	1208	struct transfer_args ta;
1011		1209
1012	switch (ix)	1210	switch (ix)
1013	{	1211	{
1014	case 0:	1212	case 0:
1015	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1213	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1016	ta.next = 0;	1214	ta.next = 0;
1017	ta.flags = TRANSFER_SET_STACKLEVEL;
1018	break;	1215	break;
1019		1216
1020	case 1:	1217	case 1:
1021	if (items != 3)	1218	if (items != 2)
1022	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1219	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1023		1220
1024	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1221	prepare_transfer (&ta, ST (0), ST (1));
1025	break;	1222	break;
1026		1223
1027	case 2:	1224	case 2:
1028	prepare_schedule (&ta);	1225	prepare_schedule (&ta);
1029	break;	1226	break;
…		…
1031	case 3:	1228	case 3:
1032	prepare_cede (&ta);	1229	prepare_cede (&ta);
1033	break;	1230	break;
1034		1231
1035	case 4:	1232	case 4:
1036	{	1233	if (!prepare_cede_notself (&ta))
1037	SV *yieldstack;	1234	XSRETURN_EMPTY;
1038	SV *sv;
1039	AV *defav = GvAV (PL_defgv);
1040		1235
1041	yieldstack = *hv_fetch (
1042	(HV *)SvRV (GvSV (coro_current)),
1043	"yieldstack", sizeof ("yieldstack") - 1,
1044	0
1045	);
1046
1047	/* set up @_ -- ugly */
1048	av_clear (defav);
1049	av_fill (defav, items - 1);
1050	while (items--)
1051	av_store (defav, items, SvREFCNT_inc (ST(items)));
1052
1053	sv = av_pop ((AV *)SvRV (yieldstack));
1054	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1055	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1056	ta.flags = 0;
1057	SvREFCNT_dec (sv);
1058	}
1059	break;	1236	break;
1060
1061	}	1237	}
1062		1238
		1239	BARRIER;
1063	TRANSFER (ta);	1240	TRANSFER (ta);
1064	}
1065		1241
1066	void	1242	if (GIMME_V != G_VOID && ta.next != ta.prev)
1067	_clone_state_from (SV *dst, SV *src)	1243	XSRETURN_YES;
		1244	}
		1245
		1246	bool
		1247	_destroy (SV *coro_sv)
1068	CODE:	1248	CODE:
1069	{	1249	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1070	struct coro *coro_src = SvSTATE (src);	1250	OUTPUT:
1071		1251	RETVAL
1072	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1073
1074	++coro_src->refcnt;
1075	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1076	}
1077		1252
1078	void	1253	void
1079	_exit (code)	1254	_exit (code)
1080	int code	1255	int code
1081	PROTOTYPE: $	1256	PROTOTYPE: $
…		…
1109	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1284	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1110	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1285	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1111	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1286	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1112	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1287	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1113		1288
1114	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1289	coro_current = get_sv ("Coro::current", FALSE);
1115	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1290	SvREADONLY_on (coro_current);
1116		1291
1117	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1292	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1118	coro_ready[i] = newAV ();	1293	coro_ready[i] = newAV ();
1119		1294
1120	{	1295	{
1121	SV *sv = perl_get_sv("Coro::API", 1);	1296	SV *sv = perl_get_sv("Coro::API", 1);
1122		1297
1123	coroapi.schedule = api_schedule;	1298	coroapi.schedule = api_schedule;
		1299	coroapi.save = api_save;
1124	coroapi.cede = api_cede;	1300	coroapi.cede = api_cede;
		1301	coroapi.cede_notself = api_cede_notself;
1125	coroapi.ready = api_ready;	1302	coroapi.ready = api_ready;
		1303	coroapi.is_ready = api_is_ready;
1126	coroapi.nready = &coro_nready;	1304	coroapi.nready = &coro_nready;
1127	coroapi.current = coro_current;	1305	coroapi.current = coro_current;
1128		1306
1129	GCoroAPI = &coroapi;	1307	GCoroAPI = &coroapi;
1130	sv_setiv (sv, (IV)&coroapi);	1308	sv_setiv (sv, (IV)&coroapi);
1131	SvREADONLY_on (sv);	1309	SvREADONLY_on (sv);
1132	}	1310	}
1133	}	1311	}
		1312
		1313	void
		1314	_set_current (SV *current)
		1315	PROTOTYPE: $
		1316	CODE:
		1317	SvREFCNT_dec (SvRV (coro_current));
		1318	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1134		1319
1135	int	1320	int
1136	prio (Coro::State coro, int newprio = 0)	1321	prio (Coro::State coro, int newprio = 0)
1137	ALIAS:	1322	ALIAS:
1138	nice = 1	1323	nice = 1
…		…
1141	RETVAL = coro->prio;	1326	RETVAL = coro->prio;
1142		1327
1143	if (items > 1)	1328	if (items > 1)
1144	{	1329	{
1145	if (ix)	1330	if (ix)
1146	newprio += coro->prio;	1331	newprio = coro->prio - newprio;
1147		1332
1148	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1333	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1149	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1334	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1150		1335
1151	coro->prio = newprio;	1336	coro->prio = newprio;
1152	}	1337	}
1153	}	1338	}
		1339	OUTPUT:
		1340	RETVAL
1154		1341
1155	void	1342	SV *
1156	ready (SV *self)	1343	ready (SV *self)
1157	PROTOTYPE: $	1344	PROTOTYPE: $
1158	CODE:	1345	CODE:
1159	api_ready (self);	1346	RETVAL = boolSV (api_ready (self));
		1347	OUTPUT:
		1348	RETVAL
		1349
		1350	SV *
		1351	is_ready (SV *self)
		1352	PROTOTYPE: $
		1353	CODE:
		1354	RETVAL = boolSV (api_is_ready (self));
		1355	OUTPUT:
		1356	RETVAL
1160		1357
1161	int	1358	int
1162	nready (...)	1359	nready (...)
1163	PROTOTYPE:	1360	PROTOTYPE:
1164	CODE:	1361	CODE:
…		…
1170		1367
1171	SV *	1368	SV *
1172	_get_state ()	1369	_get_state ()
1173	CODE:	1370	CODE:
1174	{	1371	{
1175	struct {	1372	struct io_state *data;
1176	int errorno;
1177	int laststype;
1178	int laststatval;
1179	Stat_t statcache;
1180	} data;
1181		1373
		1374	RETVAL = newSV (sizeof (struct io_state));
		1375	data = (struct io_state *)SvPVX (RETVAL);
		1376	SvCUR_set (RETVAL, sizeof (struct io_state));
		1377	SvPOK_only (RETVAL);
		1378
1182	data.errorno = errno;	1379	data->errorno = errno;
1183	data.laststype = PL_laststype;	1380	data->laststype = PL_laststype;
1184	data.laststatval = PL_laststatval;	1381	data->laststatval = PL_laststatval;
1185	data.statcache = PL_statcache;	1382	data->statcache = PL_statcache;
1186
1187	RETVAL = newSVpvn ((char *)&data, sizeof data);
1188	}	1383	}
1189	OUTPUT:	1384	OUTPUT:
1190	RETVAL	1385	RETVAL
1191		1386
1192	void	1387	void
1193	_set_state (char *data_)	1388	_set_state (char *data_)
1194	PROTOTYPE: $	1389	PROTOTYPE: $
1195	CODE:	1390	CODE:
1196	{	1391	{
1197	struct {	1392	struct io_state *data = (void *)data_;
1198	int errorno;
1199	int laststype;
1200	int laststatval;
1201	Stat_t statcache;
1202	} *data = (void *)data_;
1203		1393
1204	errno = data->errorno;	1394	errno = data->errorno;
1205	PL_laststype = data->laststype;	1395	PL_laststype = data->laststype;
1206	PL_laststatval = data->laststatval;	1396	PL_laststatval = data->laststatval;
1207	PL_statcache = data->statcache;	1397	PL_statcache = data->statcache;
1208	}	1398	}
		1399

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