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Comparing Coro/Coro/State.xs (file contents):
Revision 1.107 by root, Mon Nov 27 02:15:51 2006 UTC vs.
Revision 1.137 by root, Sun Jan 14 20:47:53 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	#endif
		39
		40	/* the maximum number of idle cctx that will be pooled */
		41	#define MAX_IDLE_CCTX 8
		42
		43	#define PERL_VERSION_ATLEAST(a,b,c) \
		44	(PERL_REVISION > (a) \
		45	|| (PERL_REVISION == (a) \
		46	&& (PERL_VERSION > (b) \
		47	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		48
		49	#if !PERL_VERSION_ATLEAST (5,6,0)
		50	# ifndef PL_ppaddr
		51	# define PL_ppaddr ppaddr
		52	# endif
		53	# ifndef call_sv
		54	# define call_sv perl_call_sv
		55	# endif
		56	# ifndef get_sv
		57	# define get_sv perl_get_sv
		58	# endif
		59	# ifndef get_cv
		60	# define get_cv perl_get_cv
		61	# endif
		62	# ifndef IS_PADGV
		63	# define IS_PADGV(v) 0
		64	# endif
		65	# ifndef IS_PADCONST
		66	# define IS_PADCONST(v) 0
		67	# endif
		68	#endif
		69
		70	/* 5.8.7 */
		71	#ifndef SvRV_set
		72	# define SvRV_set(s,v) SvRV(s) = (v)
		73	#endif
		74
		75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		76	# undef STACKGUARD
		77	#endif
		78
		79	#ifndef STACKGUARD
		80	# define STACKGUARD 0
		81	#endif
		82
		83	/* prefer perl internal functions over our own? */
		84	#ifndef PREFER_PERL_FUNCTIONS
		85	# define PREFER_PERL_FUNCTIONS 0
		86	#endif
		87
74	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* The next macro should declare a variable stacklevel that contains and approximation
75	* to the current C stack pointer. Its property is that it changes with each call	89	* to the current C stack pointer. Its property is that it changes with each call
76	* and should be unique. */	90	* and should be unique. */
77	#define dSTACKLEVEL int stacklevel	91	#define dSTACKLEVEL int stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	92	#define STACKLEVEL ((void *)&stacklevel)
79		93
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		95
82	#if __GNUC__ >= 3	96	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	97	# define attribute(x) __attribute__(x)
		98	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
84	#else	99	#else
85	# define attribute(x)	100	# define attribute(x)
		101	# define BARRIER
86	#endif	102	#endif
87		103
88	#define NOINLINE attribute ((noinline))	104	#define NOINLINE attribute ((noinline))
89		105
90	#include "CoroAPI.h"	106	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		107
94	#ifdef USE_ITHREADS	108	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	109	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	110	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	111	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	112	#else
99	# define LOCK (void)0	113	# define LOCK (void)0
100	# define UNLOCK (void)0	114	# define UNLOCK (void)0
101	#endif	115	#endif
102		116
		117	/* helper storage struct for Coro::AIO */
		118	struct io_state
		119	{
		120	int errorno;
		121	I32 laststype;
		122	int laststatval;
		123	Stat_t statcache;
		124	};
		125
103	static struct CoroAPI coroapi;	126	static struct CoroAPI coroapi;
104	static AV *main_mainstack; /* used to differentiate between $main and others */	127	static AV *main_mainstack; /* used to differentiate between $main and others */
105	static HV *coro_state_stash, *coro_stash;	128	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	129	static SV *coro_mortal; /* will be freed after next transfer */
107		130
…		…
115	/* the stack */	138	/* the stack */
116	void *sptr;	139	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	140	long ssize; /* positive == mmap, otherwise malloc */
118		141
119	/* cpu state */	142	/* cpu state */
120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	143	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		144	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	145	JMPENV *top_env;
122	coro_context cctx;	146	coro_context cctx;
123		147
		148	int inuse;
		149
124	#if USE_VALGRIND	150	#if USE_VALGRIND
125	int valgrind_id;	151	int valgrind_id;
126	#endif	152	#endif
127	} coro_cctx;	153	} coro_cctx;
		154
		155	enum {
		156	CF_RUNNING = 0x0001, /* coroutine is running */
		157	CF_READY = 0x0002, /* coroutine is ready */
		158	CF_NEW = 0x0004, /* has never been switched to */
		159	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		160	};
128		161
129	/* this is a structure representing a perl-level coroutine */	162	/* this is a structure representing a perl-level coroutine */
130	struct coro {	163	struct coro {
131	/* the c coroutine allocated to this perl coroutine, if any */	164	/* the c coroutine allocated to this perl coroutine, if any */
132	coro_cctx *cctx;	165	coro_cctx *cctx;
133		166
134	/* data associated with this coroutine (initial args) */	167	/* data associated with this coroutine (initial args) */
135	AV *args;	168	AV *args;
136	int refcnt;	169	int refcnt;
		170	int save; /* CORO_SAVE flags */
		171	int flags; /* CF_ flags */
137		172
138	/* optionally saved, might be zero */	173	/* optionally saved, might be zero */
139	AV *defav;	174	AV *defav; /* @_ */
140	SV *defsv;	175	SV *defsv; /* $_ */
141	SV *errsv;	176	SV *errsv; /* $@ */
		177	SV *irssv; /* $/ */
		178	SV *irssv_sv; /* real $/ cache */
142		179
143	/* saved global state not related to stacks */	180	#define VAR(name,type) type name;
144	U8 dowarn;	181	# include "state.h"
145	I32 in_eval;	182	#undef VAR
146
147	/* the stacks and related info (callchain etc..) */
148	PERL_SI *curstackinfo;
149	AV *curstack;
150	AV *mainstack;
151	SV **stack_sp;
152	OP *op;
153	SV **curpad;
154	AV *comppad;
155	CV *compcv;
156	SV **stack_base;
157	SV **stack_max;
158	SV **tmps_stack;
159	I32 tmps_floor;
160	I32 tmps_ix;
161	I32 tmps_max;
162	I32 *markstack;
163	I32 *markstack_ptr;
164	I32 *markstack_max;
165	I32 *scopestack;
166	I32 scopestack_ix;
167	I32 scopestack_max;
168	ANY *savestack;
169	I32 savestack_ix;
170	I32 savestack_max;
171	OP **retstack;
172	I32 retstack_ix;
173	I32 retstack_max;
174	PMOP *curpm;
175	COP *curcop;
176		183
177	/* coro process data */	184	/* coro process data */
178	int prio;	185	int prio;
179	};	186	};
180		187
181	typedef struct coro *Coro__State;	188	typedef struct coro *Coro__State;
182	typedef struct coro *Coro__State_or_hashref;	189	typedef struct coro *Coro__State_or_hashref;
		190
		191	/** Coro ********************************************************************/
		192
		193	#define PRIO_MAX 3
		194	#define PRIO_HIGH 1
		195	#define PRIO_NORMAL 0
		196	#define PRIO_LOW -1
		197	#define PRIO_IDLE -3
		198	#define PRIO_MIN -4
		199
		200	/* for Coro.pm */
		201	static SV *coro_current;
		202	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		203	static int coro_nready;
		204
		205	/** lowlevel stuff **********************************************************/
183		206
184	static AV *	207	static AV *
185	coro_clone_padlist (CV *cv)	208	coro_clone_padlist (CV *cv)
186	{	209	{
187	AV *padlist = CvPADLIST (cv);	210	AV *padlist = CvPADLIST (cv);
…		…
244		267
245	#define PERL_MAGIC_coro PERL_MAGIC_ext	268	#define PERL_MAGIC_coro PERL_MAGIC_ext
246		269
247	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	270	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
248		271
		272	#define CORO_MAGIC(cv) \
		273	SvMAGIC (cv) \
		274	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		275	? SvMAGIC (cv) \
		276	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		277	: 0
		278
249	/* the next two functions merely cache the padlists */	279	/* the next two functions merely cache the padlists */
250	static void	280	static void
251	get_padlist (CV *cv)	281	get_padlist (CV *cv)
252	{	282	{
253	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	283	MAGIC *mg = CORO_MAGIC (cv);
		284	AV *av;
254		285
255	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	286	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
256	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	287	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
257	else	288	else
258	{	289	{
259	#if 0	290	#if PREFER_PERL_FUNCTIONS
260	/* this is probably cleaner, but also slower? */	291	/* this is probably cleaner, but also slower? */
261	CV *cp = Perl_cv_clone (cv);	292	CV *cp = Perl_cv_clone (cv);
262	CvPADLIST (cv) = CvPADLIST (cp);	293	CvPADLIST (cv) = CvPADLIST (cp);
263	CvPADLIST (cp) = 0;	294	CvPADLIST (cp) = 0;
264	SvREFCNT_dec (cp);	295	SvREFCNT_dec (cp);
…		…
269	}	300	}
270		301
271	static void	302	static void
272	put_padlist (CV *cv)	303	put_padlist (CV *cv)
273	{	304	{
274	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	305	MAGIC *mg = CORO_MAGIC (cv);
		306	AV *av;
275		307
276	if (!mg)	308	if (!mg)
277	{	309	{
278	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	310	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
279	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	311	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
280	mg->mg_virtual = &vtbl_coro;	312	mg->mg_virtual = &vtbl_coro;
281	mg->mg_obj = (SV *)newAV ();	313	mg->mg_obj = (SV *)newAV ();
282	}	314	}
283		315
284	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	316	av = (AV *)mg->mg_obj;
		317
		318	if (AvFILLp (av) >= AvMAX (av))
		319	av_extend (av, AvMAX (av) + 1);
		320
		321	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
285	}	322	}
		323
		324	/** load & save, init *******************************************************/
286		325
287	#define SB do {	326	#define SB do {
288	#define SE } while (0)	327	#define SE } while (0)
289		328
290	#define LOAD(state) load_state((state));
291	#define SAVE(state,flags) save_state((state),(flags));
292
293	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	329	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
294		330
295	static void	331	static void
296	load_state(Coro__State c)	332	load_perl (Coro__State c)
297	{	333	{
298	PL_dowarn = c->dowarn;	334	#define VAR(name,type) PL_ ## name = c->name;
299	PL_in_eval = c->in_eval;	335	# include "state.h"
300		336	#undef VAR
301	PL_curstackinfo = c->curstackinfo;
302	PL_curstack = c->curstack;
303	PL_mainstack = c->mainstack;
304	PL_stack_sp = c->stack_sp;
305	PL_op = c->op;
306	PL_curpad = c->curpad;
307	PL_comppad = c->comppad;
308	PL_compcv = c->compcv;
309	PL_stack_base = c->stack_base;
310	PL_stack_max = c->stack_max;
311	PL_tmps_stack = c->tmps_stack;
312	PL_tmps_floor = c->tmps_floor;
313	PL_tmps_ix = c->tmps_ix;
314	PL_tmps_max = c->tmps_max;
315	PL_markstack = c->markstack;
316	PL_markstack_ptr = c->markstack_ptr;
317	PL_markstack_max = c->markstack_max;
318	PL_scopestack = c->scopestack;
319	PL_scopestack_ix = c->scopestack_ix;
320	PL_scopestack_max = c->scopestack_max;
321	PL_savestack = c->savestack;
322	PL_savestack_ix = c->savestack_ix;
323	PL_savestack_max = c->savestack_max;
324	#if !PERL_VERSION_ATLEAST (5,9,0)
325	PL_retstack = c->retstack;
326	PL_retstack_ix = c->retstack_ix;
327	PL_retstack_max = c->retstack_max;
328	#endif
329	PL_curpm = c->curpm;
330	PL_curcop = c->curcop;
331		337
332	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	338	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
333	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	339	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
334	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	340	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		341	if (c->irssv)
		342	{
		343	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		344	SvREFCNT_dec (c->irssv);
		345	else
		346	{
		347	REPLACE_SV (PL_rs, c->irssv);
		348	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		349	sv_setsv (c->irssv_sv, PL_rs);
		350	}
		351	}
335		352
336	{	353	{
337	dSP;	354	dSP;
338	CV *cv;	355	CV *cv;
339		356
340	/* now do the ugly restore mess */	357	/* now do the ugly restore mess */
341	while ((cv = (CV *)POPs))	358	while ((cv = (CV *)POPs))
342	{	359	{
343	AV *padlist = (AV *)POPs;
344
345	if (padlist)
346	{
347	put_padlist (cv); /* mark this padlist as available */	360	put_padlist (cv); /* mark this padlist as available */
348	CvPADLIST(cv) = padlist;	361	CvDEPTH (cv) = PTR2IV (POPs);
349	}	362	CvPADLIST (cv) = (AV *)POPs;
350
351	++CvDEPTH(cv);
352	}	363	}
353		364
354	PUTBACK;	365	PUTBACK;
355	}	366	}
356	}	367	}
357		368
358	static void	369	static void
359	save_state(Coro__State c, int flags)	370	save_perl (Coro__State c)
360	{	371	{
361	{	372	{
362	dSP;	373	dSP;
363	I32 cxix = cxstack_ix;	374	I32 cxix = cxstack_ix;
364	PERL_CONTEXT *ccstk = cxstack;	375	PERL_CONTEXT *ccstk = cxstack;
…		…
367	/*	378	/*
368	* the worst thing you can imagine happens first - we have to save	379	* the worst thing you can imagine happens first - we have to save
369	* (and reinitialize) all cv's in the whole callchain :(	380	* (and reinitialize) all cv's in the whole callchain :(
370	*/	381	*/
371		382
		383	EXTEND (SP, 3 + 1);
372	PUSHs (Nullsv);	384	PUSHs (Nullsv);
373	/* this loop was inspired by pp_caller */	385	/* this loop was inspired by pp_caller */
374	for (;;)	386	for (;;)
375	{	387	{
376	while (cxix >= 0)	388	while (cxix >= 0)
377	{	389	{
378	PERL_CONTEXT *cx = &ccstk[cxix--];	390	PERL_CONTEXT *cx = &ccstk[cxix--];
379		391
380	if (CxTYPE(cx) == CXt_SUB)	392	if (CxTYPE (cx) == CXt_SUB)
381	{	393	{
382	CV *cv = cx->blk_sub.cv;	394	CV *cv = cx->blk_sub.cv;
		395
383	if (CvDEPTH(cv))	396	if (CvDEPTH (cv))
384	{	397	{
385	EXTEND (SP, CvDEPTH(cv)*2);	398	EXTEND (SP, 3);
386
387	while (--CvDEPTH(cv))
388	{
389	/* this tells the restore code to increment CvDEPTH */
390	PUSHs (Nullsv);
391	PUSHs ((SV *)cv);
392	}
393
394	PUSHs ((SV *)CvPADLIST(cv));	399	PUSHs ((SV *)CvPADLIST (cv));
		400	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
395	PUSHs ((SV *)cv);	401	PUSHs ((SV *)cv);
396		402
		403	CvDEPTH (cv) = 0;
397	get_padlist (cv);	404	get_padlist (cv);
398	}	405	}
399	}	406	}
400	#ifdef CXt_FORMAT
401	else if (CxTYPE(cx) == CXt_FORMAT)
402	{
403	/* I never used formats, so how should I know how these are implemented? */
404	/* my bold guess is as a simple, plain sub... */
405	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
406	}
407	#endif
408	}	407	}
409		408
410	if (top_si->si_type == PERLSI_MAIN)	409	if (top_si->si_type == PERLSI_MAIN)
411	break;	410	break;
412		411
…		…
416	}	415	}
417		416
418	PUTBACK;	417	PUTBACK;
419	}	418	}
420		419
421	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	420	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
422	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	421	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
423	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	422	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		423	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
424		424
425	c->dowarn = PL_dowarn;	425	#define VAR(name,type)c->name = PL_ ## name;
426	c->in_eval = PL_in_eval;	426	# include "state.h"
427		427	#undef VAR
428	c->curstackinfo = PL_curstackinfo;
429	c->curstack = PL_curstack;
430	c->mainstack = PL_mainstack;
431	c->stack_sp = PL_stack_sp;
432	c->op = PL_op;
433	c->curpad = PL_curpad;
434	c->comppad = PL_comppad;
435	c->compcv = PL_compcv;
436	c->stack_base = PL_stack_base;
437	c->stack_max = PL_stack_max;
438	c->tmps_stack = PL_tmps_stack;
439	c->tmps_floor = PL_tmps_floor;
440	c->tmps_ix = PL_tmps_ix;
441	c->tmps_max = PL_tmps_max;
442	c->markstack = PL_markstack;
443	c->markstack_ptr = PL_markstack_ptr;
444	c->markstack_max = PL_markstack_max;
445	c->scopestack = PL_scopestack;
446	c->scopestack_ix = PL_scopestack_ix;
447	c->scopestack_max = PL_scopestack_max;
448	c->savestack = PL_savestack;
449	c->savestack_ix = PL_savestack_ix;
450	c->savestack_max = PL_savestack_max;
451	#if !PERL_VERSION_ATLEAST (5,9,0)
452	c->retstack = PL_retstack;
453	c->retstack_ix = PL_retstack_ix;
454	c->retstack_max = PL_retstack_max;
455	#endif
456	c->curpm = PL_curpm;
457	c->curcop = PL_curcop;
458	}	428	}
459		429
460	/*	430	/*
461	* allocate various perl stacks. This is an exact copy	431	* allocate various perl stacks. This is an exact copy
462	* of perl.c:init_stacks, except that it uses less memory	432	* of perl.c:init_stacks, except that it uses less memory
463	* on the (sometimes correct) assumption that coroutines do	433	* on the (sometimes correct) assumption that coroutines do
464	* not usually need a lot of stackspace.	434	* not usually need a lot of stackspace.
465	*/	435	*/
		436	#if PREFER_PERL_FUNCTIONS
		437	# define coro_init_stacks init_stacks
		438	#else
466	static void	439	static void
467	coro_init_stacks ()	440	coro_init_stacks ()
468	{	441	{
469	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	442	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
470	PL_curstackinfo->si_type = PERLSI_MAIN;	443	PL_curstackinfo->si_type = PERLSI_MAIN;
471	PL_curstack = PL_curstackinfo->si_stack;	444	PL_curstack = PL_curstackinfo->si_stack;
472	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	445	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
473		446
474	PL_stack_base = AvARRAY(PL_curstack);	447	PL_stack_base = AvARRAY(PL_curstack);
475	PL_stack_sp = PL_stack_base;	448	PL_stack_sp = PL_stack_base;
476	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	449	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
477		450
478	New(50,PL_tmps_stack,96,SV*);	451	New(50,PL_tmps_stack,128,SV*);
479	PL_tmps_floor = -1;	452	PL_tmps_floor = -1;
480	PL_tmps_ix = -1;	453	PL_tmps_ix = -1;
481	PL_tmps_max = 96;	454	PL_tmps_max = 128;
482		455
483	New(54,PL_markstack,16,I32);	456	New(54,PL_markstack,32,I32);
484	PL_markstack_ptr = PL_markstack;	457	PL_markstack_ptr = PL_markstack;
485	PL_markstack_max = PL_markstack + 16;	458	PL_markstack_max = PL_markstack + 32;
486		459
487	#ifdef SET_MARK_OFFSET	460	#ifdef SET_MARK_OFFSET
488	SET_MARK_OFFSET;	461	SET_MARK_OFFSET;
489	#endif	462	#endif
490		463
491	New(54,PL_scopestack,16,I32);	464	New(54,PL_scopestack,32,I32);
492	PL_scopestack_ix = 0;	465	PL_scopestack_ix = 0;
493	PL_scopestack_max = 16;	466	PL_scopestack_max = 32;
494		467
495	New(54,PL_savestack,96,ANY);	468	New(54,PL_savestack,64,ANY);
496	PL_savestack_ix = 0;	469	PL_savestack_ix = 0;
497	PL_savestack_max = 96;	470	PL_savestack_max = 64;
498		471
499	#if !PERL_VERSION_ATLEAST (5,9,0)	472	#if !PERL_VERSION_ATLEAST (5,9,0)
500	New(54,PL_retstack,8,OP*);	473	New(54,PL_retstack,16,OP*);
501	PL_retstack_ix = 0;	474	PL_retstack_ix = 0;
502	PL_retstack_max = 8;	475	PL_retstack_max = 16;
503	#endif	476	#endif
504	}	477	}
		478	#endif
505		479
506	/*	480	/*
507	* destroy the stacks, the callchain etc...	481	* destroy the stacks, the callchain etc...
508	*/	482	*/
509	static void	483	static void
510	coro_destroy_stacks ()	484	coro_destroy_stacks ()
511	{	485	{
512	if (!IN_DESTRUCT)	486	if (!IN_DESTRUCT)
513	{	487	{
514	/* is this ugly, I ask? */	488	/* restore all saved variables and stuff */
515	LEAVE_SCOPE (0);	489	LEAVE_SCOPE (0);
		490	assert (PL_tmps_floor == -1);
516		491
517	/* sure it is, but more important: is it correct?? :/ */	492	/* free all temporaries */
518	FREETMPS;	493	FREETMPS;
		494	assert (PL_tmps_ix == -1);
519		495
		496	/* unwind all extra stacks */
520	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	497	POPSTACK_TO (PL_mainstack);
		498
		499	/* unwind main stack */
		500	dounwind (-1);
521	}	501	}
522		502
523	while (PL_curstackinfo->si_next)	503	while (PL_curstackinfo->si_next)
524	PL_curstackinfo = PL_curstackinfo->si_next;	504	PL_curstackinfo = PL_curstackinfo->si_next;
525		505
526	while (PL_curstackinfo)	506	while (PL_curstackinfo)
527	{	507	{
528	PERL_SI *p = PL_curstackinfo->si_prev;	508	PERL_SI *p = PL_curstackinfo->si_prev;
529		509
530	{ /*D*//*remove*/
531	dSP;
532	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
533	PUTBACK; /* possibly superfluous */
534	}
535
536	if (!IN_DESTRUCT)	510	if (!IN_DESTRUCT)
537	{
538	dounwind (-1);/*D*//*remove*/
539	SvREFCNT_dec (PL_curstackinfo->si_stack);	511	SvREFCNT_dec (PL_curstackinfo->si_stack);
540	}
541		512
542	Safefree (PL_curstackinfo->si_cxstack);	513	Safefree (PL_curstackinfo->si_cxstack);
543	Safefree (PL_curstackinfo);	514	Safefree (PL_curstackinfo);
544	PL_curstackinfo = p;	515	PL_curstackinfo = p;
545	}	516	}
…		…
551	#if !PERL_VERSION_ATLEAST (5,9,0)	522	#if !PERL_VERSION_ATLEAST (5,9,0)
552	Safefree (PL_retstack);	523	Safefree (PL_retstack);
553	#endif	524	#endif
554	}	525	}
555		526
		527	/** coroutine stack handling ************************************************/
		528
556	static void	529	static void
557	setup_coro (struct coro *coro)	530	setup_coro (struct coro *coro)
558	{	531	{
559	/*	532	/*
560	* emulate part of the perl startup here.	533	* emulate part of the perl startup here.
561	*/	534	*/
562		535
563	coro_init_stacks ();	536	coro_init_stacks ();
564		537
565	PL_curcop = 0;	538	PL_curcop = &PL_compiling;
566	PL_in_eval = 0;	539	PL_in_eval = EVAL_NULL;
567	PL_curpm = 0;	540	PL_curpm = 0;
		541	PL_localizing = 0;
		542	PL_dirty = 0;
		543	PL_restartop = 0;
568		544
569	{	545	{
570	dSP;	546	dSP;
571	LOGOP myop;	547	LOGOP myop;
572		548
573	/* I have no idea why this is needed, but it is */
574	PUSHMARK (SP);
575
576	SvREFCNT_dec (GvAV (PL_defgv));	549	SvREFCNT_dec (GvAV (PL_defgv));
577	GvAV (PL_defgv) = coro->args; coro->args = 0;	550	GvAV (PL_defgv) = coro->args; coro->args = 0;
578		551
579	Zero (&myop, 1, LOGOP);	552	Zero (&myop, 1, LOGOP);
580	myop.op_next = Nullop;	553	myop.op_next = Nullop;
581	myop.op_flags = OPf_WANT_VOID;	554	myop.op_flags = OPf_WANT_VOID;
582		555
583	PL_op = (OP *)&myop;
584
585	PUSHMARK (SP);	556	PUSHMARK (SP);
586	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	557	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
587	PUTBACK;	558	PUTBACK;
		559	PL_op = (OP *)&myop;
588	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	560	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
589	SPAGAIN;	561	SPAGAIN;
590
591	ENTER; /* necessary e.g. for dounwind */
592	}	562	}
		563
		564	ENTER; /* necessary e.g. for dounwind */
593	}	565	}
594		566
595	static void	567	static void
596	free_coro_mortal ()	568	free_coro_mortal ()
597	{	569	{
…		…
600	SvREFCNT_dec (coro_mortal);	572	SvREFCNT_dec (coro_mortal);
601	coro_mortal = 0;	573	coro_mortal = 0;
602	}	574	}
603	}	575	}
604		576
		577	/* inject a fake call to Coro::State::_cctx_init into the execution */
605	static void NOINLINE	578	static void NOINLINE
606	prepare_cctx (coro_cctx *cctx)	579	prepare_cctx (coro_cctx *cctx)
607	{	580	{
608	dSP;	581	dSP;
609	LOGOP myop;	582	LOGOP myop;
610		583
611	Zero (&myop, 1, LOGOP);	584	Zero (&myop, 1, LOGOP);
612	myop.op_next = PL_op;	585	myop.op_next = PL_op;
613	myop.op_flags = OPf_WANT_VOID;	586	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
614
615	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
616		587
617	PUSHMARK (SP);	588	PUSHMARK (SP);
		589	EXTEND (SP, 2);
		590	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
618	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	591	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
619	PUTBACK;	592	PUTBACK;
		593	PL_op = (OP *)&myop;
620	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	594	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
621	SPAGAIN;	595	SPAGAIN;
622	}	596	}
623		597
624	static void	598	static void
625	coro_run (void *arg)	599	coro_run (void *arg)
626	{	600	{
627	/* coro_run is the alternative epilogue of transfer() */	601	/* coro_run is the alternative tail of transfer(), so unlock here. */
628	UNLOCK;	602	UNLOCK;
629		603
630	/*	604	/*
631	* this is a _very_ stripped down perl interpreter ;)	605	* this is a _very_ stripped down perl interpreter ;)
632	*/	606	*/
…		…
634		608
635	/* inject call to cctx_init */	609	/* inject call to cctx_init */
636	prepare_cctx ((coro_cctx *)arg);	610	prepare_cctx ((coro_cctx *)arg);
637		611
638	/* somebody will hit me for both perl_run and PL_restartop */	612	/* somebody will hit me for both perl_run and PL_restartop */
		613	PL_restartop = PL_op;
639	perl_run (PL_curinterp);	614	perl_run (PL_curinterp);
640		615
641	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	616	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
642	abort ();	617	abort ();
643	}	618	}
…		…
647	{	622	{
648	coro_cctx *cctx;	623	coro_cctx *cctx;
649		624
650	++cctx_count;	625	++cctx_count;
651		626
652	New (0, cctx, 1, coro_cctx);	627	Newz (0, cctx, 1, coro_cctx);
653		628
654	#if HAVE_MMAP	629	#if HAVE_MMAP
655		630
656	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	631	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
657	/* mmap suppsedly does allocate-on-write for us */	632	/* mmap supposedly does allocate-on-write for us */
658	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	633	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
659		634
660	if (cctx->sptr == (void *)-1)	635	if (cctx->sptr == (void *)-1)
661	{	636	{
662	perror ("FATAL: unable to mmap stack for coroutine");	637	perror ("FATAL: unable to mmap stack for coroutine");
…		…
691		666
692	return cctx;	667	return cctx;
693	}	668	}
694		669
695	static void	670	static void
696	cctx_free (coro_cctx *cctx)	671	cctx_destroy (coro_cctx *cctx)
697	{	672	{
698	if (!cctx)	673	if (!cctx)
699	return;	674	return;
700		675
701	--cctx_count;	676	--cctx_count;
…		…
718	{	693	{
719	coro_cctx *cctx;	694	coro_cctx *cctx;
720		695
721	if (cctx_first)	696	if (cctx_first)
722	{	697	{
723	--cctx_idle;
724	cctx = cctx_first;	698	cctx = cctx_first;
725	cctx_first = cctx->next;	699	cctx_first = cctx->next;
		700	--cctx_idle;
726	}	701	}
727	else	702	else
728	{	703	{
729	cctx = cctx_new ();	704	cctx = cctx_new ();
730	PL_op = PL_op->op_next;	705	PL_op = PL_op->op_next;
…		…
734	}	709	}
735		710
736	static void	711	static void
737	cctx_put (coro_cctx *cctx)	712	cctx_put (coro_cctx *cctx)
738	{	713	{
		714	/* free another cctx if overlimit */
		715	if (cctx_idle >= MAX_IDLE_CCTX)
		716	{
		717	coro_cctx *first = cctx_first;
		718	cctx_first = first->next;
		719	--cctx_idle;
		720
		721	assert (!first->inuse);
		722	cctx_destroy (first);
		723	}
		724
739	++cctx_idle;	725	++cctx_idle;
740	cctx->next = cctx_first;	726	cctx->next = cctx_first;
741	cctx_first = cctx;	727	cctx_first = cctx;
742	}	728	}
743		729
		730	/** coroutine switching *****************************************************/
		731
744	/* never call directly, always through the coro_state_transfer global variable */	732	/* never call directly, always through the coro_state_transfer global variable */
745	static void NOINLINE	733	static void NOINLINE
746	transfer (struct coro *prev, struct coro *next, int flags)	734	transfer (struct coro *prev, struct coro *next)
747	{	735	{
748	dSTACKLEVEL;	736	dSTACKLEVEL;
749		737
750	/* sometimes transfer is only called to set idle_sp */	738	/* sometimes transfer is only called to set idle_sp */
751	if (flags == TRANSFER_SET_STACKLEVEL)	739	if (!next)
		740	{
752	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	741	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		742	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		743	}
753	else if (prev != next)	744	else if (prev != next)
754	{	745	{
755	coro_cctx *prev__cctx;	746	coro_cctx *prev__cctx;
756		747
		748	if (prev->flags & CF_NEW)
		749	{
		750	/* create a new empty context */
		751	Newz (0, prev->cctx, 1, coro_cctx);
		752	prev->cctx->inuse = 1;
		753	prev->flags &= ~CF_NEW;
		754	prev->flags |= CF_RUNNING;
		755	}
		756
		757	/*TODO: must not croak here */
		758	if (!prev->flags & CF_RUNNING)
		759	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		760
		761	if (next->flags & CF_RUNNING)
		762	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		763
		764	if (next->flags & CF_DESTROYED)
		765	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		766
		767	prev->flags &= ~CF_RUNNING;
		768	next->flags |= CF_RUNNING;
		769
757	LOCK;	770	LOCK;
758		771
759	if (next->mainstack)	772	if (next->flags & CF_NEW)
760	{	773	{
761	/* coroutine already started */	774	/* need to start coroutine */
762	SAVE (prev, flags);	775	next->flags &= ~CF_NEW;
763	LOAD (next);	776	/* first get rid of the old state */
		777	save_perl (prev);
		778	/* setup coroutine call */
		779	setup_coro (next);
		780	/* need a new stack */
		781	assert (!next->cctx);
764	}	782	}
765	else	783	else
766	{	784	{
767	/* need to start coroutine */	785	/* coroutine already started */
768	/* first get rid of the old state */	786	save_perl (prev);
769	SAVE (prev, -1);	787	load_perl (next);
770	/* setup coroutine call */
771	setup_coro (next);
772	/* need a stack */
773	next->cctx = 0;
774	}	788	}
775
776	if (!prev->cctx)
777	/* create a new empty context */
778	Newz (0, prev->cctx, 1, coro_cctx);
779		789
780	prev__cctx = prev->cctx;	790	prev__cctx = prev->cctx;
781		791
782	/* possibly "free" the cctx */	792	/* possibly "free" the cctx */
783	if (prev__cctx->idle_sp == STACKLEVEL)	793	if (prev__cctx->idle_sp == STACKLEVEL)
784	{	794	{
		795	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		796	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		797
		798	prev->cctx = 0;
		799
785	cctx_put (prev__cctx);	800	cctx_put (prev__cctx);
786	prev->cctx = 0;	801	prev__cctx->inuse = 0;
787	}	802	}
788		803
789	if (!next->cctx)	804	if (!next->cctx)
		805	{
790	next->cctx = cctx_get ();	806	next->cctx = cctx_get ();
		807	assert (!next->cctx->inuse);
		808	next->cctx->inuse = 1;
		809	}
791		810
792	if (prev__cctx != next->cctx)	811	if (prev__cctx != next->cctx)
793	{	812	{
794	prev__cctx->top_env = PL_top_env;	813	prev__cctx->top_env = PL_top_env;
795	PL_top_env = next->cctx->top_env;	814	PL_top_env = next->cctx->top_env;
796	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	815	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
797	}	816	}
798		817
799	free_coro_mortal ();	818	free_coro_mortal ();
800
801	UNLOCK;	819	UNLOCK;
802	}	820	}
803	}	821	}
804		822
805	struct transfer_args	823	struct transfer_args
806	{	824	{
807	struct coro *prev, *next;	825	struct coro *prev, *next;
808	int flags;
809	};	826	};
810		827
811	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	828	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
812		829
		830	/** high level stuff ********************************************************/
		831
813	static void	832	static int
814	coro_state_destroy (struct coro *coro)	833	coro_state_destroy (struct coro *coro)
815	{	834	{
816	if (coro->refcnt--)	835	if (coro->flags & CF_DESTROYED)
817	return;	836	return 0;
		837
		838	coro->flags |= CF_DESTROYED;
		839
		840	if (coro->flags & CF_READY)
		841	{
		842	/* reduce nready, as destroying a ready coro effectively unreadies it */
		843	/* alternative: look through all ready queues and remove it */
		844	LOCK;
		845	--coro_nready;
		846	UNLOCK;
		847	}
		848	else
		849	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
818		850
819	if (coro->mainstack && coro->mainstack != main_mainstack)	851	if (coro->mainstack && coro->mainstack != main_mainstack)
820	{	852	{
		853	assert (!(coro->flags & CF_RUNNING));
		854
821	struct coro temp;	855	struct coro temp;
		856	Zero (&temp, 1, struct coro);
		857	temp.save = CORO_SAVE_ALL;
822		858
823	SAVE ((&temp), TRANSFER_SAVE_ALL);	859	if (coro->flags & CF_RUNNING)
824	LOAD (coro);	860	croak ("FATAL: tried to destroy currently running coroutine");
		861
		862	save_perl (&temp);
		863	load_perl (coro);
825		864
826	coro_destroy_stacks ();	865	coro_destroy_stacks ();
827		866
828	LOAD ((&temp)); /* this will get rid of defsv etc.. */	867	load_perl (&temp); /* this will get rid of defsv etc.. */
829		868
830	coro->mainstack = 0;	869	coro->mainstack = 0;
831	}	870	}
832		871
833	cctx_free (coro->cctx);	872	cctx_destroy (coro->cctx);
834	SvREFCNT_dec (coro->args);	873	SvREFCNT_dec (coro->args);
835	Safefree (coro);	874
		875	return 1;
836	}	876	}
837		877
838	static int	878	static int
839	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	879	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
840	{	880	{
841	struct coro *coro = (struct coro *)mg->mg_ptr;	881	struct coro *coro = (struct coro *)mg->mg_ptr;
842	mg->mg_ptr = 0;	882	mg->mg_ptr = 0;
843		883
		884	if (--coro->refcnt < 0)
		885	{
844	coro_state_destroy (coro);	886	coro_state_destroy (coro);
		887	Safefree (coro);
		888	}
845		889
846	return 0;	890	return 0;
847	}	891	}
848		892
849	static int	893	static int
…		…
856	return 0;	900	return 0;
857	}	901	}
858		902
859	static MGVTBL coro_state_vtbl = {	903	static MGVTBL coro_state_vtbl = {
860	0, 0, 0, 0,	904	0, 0, 0, 0,
861	coro_state_clear,	905	coro_state_free,
862	0,	906	0,
863	#ifdef MGf_DUP	907	#ifdef MGf_DUP
864	coro_state_dup,	908	coro_state_dup,
865	#else	909	#else
866	# define MGf_DUP 0	910	# define MGf_DUP 0
…		…
888	assert (mg->mg_type == PERL_MAGIC_ext);	932	assert (mg->mg_type == PERL_MAGIC_ext);
889	return (struct coro *)mg->mg_ptr;	933	return (struct coro *)mg->mg_ptr;
890	}	934	}
891		935
892	static void	936	static void
893	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	937	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
894	{	938	{
895	ta->prev = SvSTATE (prev);	939	ta->prev = SvSTATE (prev_sv);
896	ta->next = SvSTATE (next);	940	ta->next = SvSTATE (next_sv);
897	ta->flags = flags;
898	}	941	}
899		942
900	static void	943	static void
901	api_transfer (SV *prev, SV *next, int flags)	944	api_transfer (SV *prev_sv, SV *next_sv)
902	{	945	{
903	dTHX;
904	struct transfer_args ta;	946	struct transfer_args ta;
905		947
906	prepare_transfer (&ta, prev, next, flags);	948	prepare_transfer (&ta, prev_sv, next_sv);
907	TRANSFER (ta);	949	TRANSFER (ta);
908	}	950	}
909		951
		952	static int
		953	api_save (SV *coro_sv, int new_save)
		954	{
		955	struct coro *coro = SvSTATE (coro_sv);
		956	int old_save = coro->save;
		957
		958	if (new_save >= 0)
		959	coro->save = new_save;
		960
		961	return old_save;
		962	}
		963
910	/** Coro ********************************************************************/	964	/** Coro ********************************************************************/
911		965
912	#define PRIO_MAX 3
913	#define PRIO_HIGH 1
914	#define PRIO_NORMAL 0
915	#define PRIO_LOW -1
916	#define PRIO_IDLE -3
917	#define PRIO_MIN -4
918
919	/* for Coro.pm */
920	static GV *coro_current, *coro_idle;
921	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
922	static int coro_nready;
923
924	static void	966	static void
925	coro_enq (SV *sv)	967	coro_enq (SV *coro_sv)
926	{	968	{
927	int prio;
928
929	if (SvTYPE (sv) != SVt_PVHV)
930	croak ("Coro::ready tried to enqueue something that is not a coroutine");
931
932	prio = SvSTATE (sv)->prio;
933
934	av_push (coro_ready [prio - PRIO_MIN], sv);	969	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
935	coro_nready++;
936	}	970	}
937		971
938	static SV *	972	static SV *
939	coro_deq (int min_prio)	973	coro_deq (int min_prio)
940	{	974	{
…		…
944	if (min_prio < 0)	978	if (min_prio < 0)
945	min_prio = 0;	979	min_prio = 0;
946		980
947	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	981	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
948	if (AvFILLp (coro_ready [prio]) >= 0)	982	if (AvFILLp (coro_ready [prio]) >= 0)
949	{
950	coro_nready--;
951	return av_shift (coro_ready [prio]);	983	return av_shift (coro_ready [prio]);
952	}
953		984
954	return 0;	985	return 0;
955	}	986	}
956		987
957	static void	988	static int
958	api_ready (SV *coro)	989	api_ready (SV *coro_sv)
959	{	990	{
960	dTHX;	991	struct coro *coro;
961		992
962	if (SvROK (coro))	993	if (SvROK (coro_sv))
963	coro = SvRV (coro);	994	coro_sv = SvRV (coro_sv);
		995
		996	coro = SvSTATE (coro_sv);
		997
		998	if (coro->flags & CF_READY)
		999	return 0;
		1000
		1001	coro->flags |= CF_READY;
964		1002
965	LOCK;	1003	LOCK;
966	coro_enq (SvREFCNT_inc (coro));	1004	coro_enq (SvREFCNT_inc (coro_sv));
		1005	++coro_nready;
967	UNLOCK;	1006	UNLOCK;
		1007
		1008	return 1;
		1009	}
		1010
		1011	static int
		1012	api_is_ready (SV *coro_sv)
		1013	{
		1014	return !!(SvSTATE (coro_sv)->flags & CF_READY);
968	}	1015	}
969		1016
970	static void	1017	static void
971	prepare_schedule (struct transfer_args *ta)	1018	prepare_schedule (struct transfer_args *ta)
972	{	1019	{
973	SV *current, *prev, *next;	1020	SV *prev_sv, *next_sv;
974
975	current = GvSV (coro_current);
976		1021
977	for (;;)	1022	for (;;)
978	{	1023	{
979	LOCK;	1024	LOCK;
980	next = coro_deq (PRIO_MIN);	1025	next_sv = coro_deq (PRIO_MIN);
981	UNLOCK;	1026	UNLOCK;
982		1027
		1028	/* nothing to schedule: call the idle handler */
983	if (next)	1029	if (!next_sv)
984	break;
985
986	{	1030	{
987	dSP;	1031	dSP;
988		1032
989	ENTER;	1033	ENTER;
990	SAVETMPS;	1034	SAVETMPS;
991		1035
992	PUSHMARK (SP);	1036	PUSHMARK (SP);
993	PUTBACK;	1037	PUTBACK;
994	call_sv (GvSV (coro_idle), G_DISCARD);	1038	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
995		1039
996	FREETMPS;	1040	FREETMPS;
997	LEAVE;	1041	LEAVE;
		1042	continue;
998	}	1043	}
999	}
1000		1044
1001	prev = SvRV (current);	1045	ta->next = SvSTATE (next_sv);
1002	SvRV (current) = next;	1046
		1047	/* cannot transfer to destroyed coros, skip and look for next */
		1048	if (ta->next->flags & CF_DESTROYED)
		1049	{
		1050	SvREFCNT_dec (next_sv);
		1051	/* coro_nready is already taken care of by destroy */
		1052	continue;
		1053	}
		1054
		1055	LOCK;
		1056	--coro_nready;
		1057	UNLOCK;
		1058	break;
		1059	}
1003		1060
1004	/* free this only after the transfer */	1061	/* free this only after the transfer */
		1062	prev_sv = SvRV (coro_current);
		1063	SvRV_set (coro_current, next_sv);
		1064	ta->prev = SvSTATE (prev_sv);
		1065
		1066	assert (ta->next->flags & CF_READY);
		1067	ta->next->flags &= ~CF_READY;
		1068
1005	LOCK;	1069	LOCK;
1006	free_coro_mortal ();	1070	free_coro_mortal ();
		1071	coro_mortal = prev_sv;
1007	UNLOCK;	1072	UNLOCK;
1008	coro_mortal = prev;
1009
1010	ta->prev = SvSTATE (prev);
1011	ta->next = SvSTATE (next);
1012	ta->flags = TRANSFER_SAVE_ALL;
1013	}	1073	}
1014		1074
1015	static void	1075	static void
1016	prepare_cede (struct transfer_args *ta)	1076	prepare_cede (struct transfer_args *ta)
1017	{	1077	{
1018	LOCK;	1078	api_ready (coro_current);
1019	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1020	UNLOCK;
1021
1022	prepare_schedule (ta);	1079	prepare_schedule (ta);
1023	}	1080	}
1024		1081
		1082	static int
		1083	prepare_cede_notself (struct transfer_args *ta)
		1084	{
		1085	if (coro_nready)
		1086	{
		1087	SV *prev = SvRV (coro_current);
		1088	prepare_schedule (ta);
		1089	api_ready (prev);
		1090	return 1;
		1091	}
		1092	else
		1093	return 0;
		1094	}
		1095
1025	static void	1096	static void
1026	api_schedule (void)	1097	api_schedule (void)
1027	{	1098	{
1028	dTHX;
1029	struct transfer_args ta;	1099	struct transfer_args ta;
1030		1100
1031	prepare_schedule (&ta);	1101	prepare_schedule (&ta);
1032	TRANSFER (ta);	1102	TRANSFER (ta);
1033	}	1103	}
1034		1104
1035	static void	1105	static int
1036	api_cede (void)	1106	api_cede (void)
1037	{	1107	{
1038	dTHX;
1039	struct transfer_args ta;	1108	struct transfer_args ta;
1040		1109
1041	prepare_cede (&ta);	1110	prepare_cede (&ta);
		1111
		1112	if (ta.prev != ta.next)
		1113	{
1042	TRANSFER (ta);	1114	TRANSFER (ta);
		1115	return 1;
		1116	}
		1117	else
		1118	return 0;
		1119	}
		1120
		1121	static int
		1122	api_cede_notself (void)
		1123	{
		1124	struct transfer_args ta;
		1125
		1126	if (prepare_cede_notself (&ta))
		1127	{
		1128	TRANSFER (ta);
		1129	return 1;
		1130	}
		1131	else
		1132	return 0;
1043	}	1133	}
1044		1134
1045	MODULE = Coro::State PACKAGE = Coro::State	1135	MODULE = Coro::State PACKAGE = Coro::State
1046		1136
1047	PROTOTYPES: DISABLE	1137	PROTOTYPES: DISABLE
…		…
1053	#endif	1143	#endif
1054	BOOT_PAGESIZE;	1144	BOOT_PAGESIZE;
1055		1145
1056	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1146	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1057		1147
1058	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1148	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1059	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1149	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1060	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1150	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1151	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1152	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1061		1153
1062	main_mainstack = PL_mainstack;	1154	main_mainstack = PL_mainstack;
1063		1155
1064	coroapi.ver = CORO_API_VERSION;	1156	coroapi.ver = CORO_API_VERSION;
1065	coroapi.transfer = api_transfer;	1157	coroapi.transfer = api_transfer;
…		…
1075	HV *hv;	1167	HV *hv;
1076	int i;	1168	int i;
1077		1169
1078	Newz (0, coro, 1, struct coro);	1170	Newz (0, coro, 1, struct coro);
1079	coro->args = newAV ();	1171	coro->args = newAV ();
		1172	coro->save = CORO_SAVE_ALL;
		1173	coro->flags = CF_NEW;
1080		1174
1081	hv = newHV ();	1175	hv = newHV ();
1082	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1176	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1083	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1177	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1084		1178
1085	for (i = 1; i < items; i++)	1179	for (i = 1; i < items; i++)
1086	av_push (coro->args, newSVsv (ST (i)));	1180	av_push (coro->args, newSVsv (ST (i)));
1087	}	1181	}
1088	OUTPUT:	1182	OUTPUT:
		1183	RETVAL
		1184
		1185	int
		1186	save (SV *coro, int new_save = -1)
		1187	CODE:
		1188	RETVAL = api_save (coro, new_save);
		1189	OUTPUT:
1089	RETVAL	1190	RETVAL
1090		1191
1091	void	1192	void
1092	_set_stacklevel (...)	1193	_set_stacklevel (...)
1093	ALIAS:	1194	ALIAS:
1094	Coro::State::transfer = 1	1195	Coro::State::transfer = 1
1095	Coro::schedule = 2	1196	Coro::schedule = 2
1096	Coro::cede = 3	1197	Coro::cede = 3
1097	Coro::Cont::yield = 4	1198	Coro::cede_notself = 4
1098	CODE:	1199	CODE:
1099	{	1200	{
1100	struct transfer_args ta;	1201	struct transfer_args ta;
1101		1202
1102	switch (ix)	1203	switch (ix)
1103	{	1204	{
1104	case 0:	1205	case 0:
1105	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1206	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1106	ta.next = 0;	1207	ta.next = 0;
1107	ta.flags = TRANSFER_SET_STACKLEVEL;
1108	break;	1208	break;
1109		1209
1110	case 1:	1210	case 1:
1111	if (items != 3)	1211	if (items != 2)
1112	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1212	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1113		1213
1114	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1214	prepare_transfer (&ta, ST (0), ST (1));
1115	break;	1215	break;
1116		1216
1117	case 2:	1217	case 2:
1118	prepare_schedule (&ta);	1218	prepare_schedule (&ta);
1119	break;	1219	break;
…		…
1121	case 3:	1221	case 3:
1122	prepare_cede (&ta);	1222	prepare_cede (&ta);
1123	break;	1223	break;
1124		1224
1125	case 4:	1225	case 4:
1126	{	1226	if (!prepare_cede_notself (&ta))
1127	SV *yieldstack;	1227	XSRETURN_EMPTY;
1128	SV *sv;
1129	AV *defav = GvAV (PL_defgv);
1130		1228
1131	yieldstack = *hv_fetch (
1132	(HV *)SvRV (GvSV (coro_current)),
1133	"yieldstack", sizeof ("yieldstack") - 1,
1134	0
1135	);
1136
1137	/* set up @_ -- ugly */
1138	av_clear (defav);
1139	av_fill (defav, items - 1);
1140	while (items--)
1141	av_store (defav, items, SvREFCNT_inc (ST(items)));
1142
1143	sv = av_pop ((AV *)SvRV (yieldstack));
1144	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1145	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1146	ta.flags = 0;
1147	SvREFCNT_dec (sv);
1148	}
1149	break;	1229	break;
1150
1151	}	1230	}
1152		1231
		1232	BARRIER;
1153	TRANSFER (ta);	1233	TRANSFER (ta);
1154	}
1155		1234
1156	void	1235	if (GIMME_V != G_VOID && ta.next != ta.prev)
1157	_clone_state_from (SV *dst, SV *src)	1236	XSRETURN_YES;
		1237	}
		1238
		1239	bool
		1240	_destroy (SV *coro_sv)
1158	CODE:	1241	CODE:
1159	{	1242	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1160	struct coro *coro_src = SvSTATE (src);	1243	OUTPUT:
1161		1244	RETVAL
1162	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1163
1164	++coro_src->refcnt;
1165	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1166	}
1167		1245
1168	void	1246	void
1169	_exit (code)	1247	_exit (code)
1170	int code	1248	int code
1171	PROTOTYPE: $	1249	PROTOTYPE: $
…		…
1199	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1277	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1200	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1278	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1201	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1279	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1202	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1280	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1203		1281
1204	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1282	coro_current = get_sv ("Coro::current", FALSE);
1205	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1283	SvREADONLY_on (coro_current);
1206		1284
1207	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1285	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1208	coro_ready[i] = newAV ();	1286	coro_ready[i] = newAV ();
1209		1287
1210	{	1288	{
1211	SV *sv = perl_get_sv("Coro::API", 1);	1289	SV *sv = perl_get_sv("Coro::API", 1);
1212		1290
1213	coroapi.schedule = api_schedule;	1291	coroapi.schedule = api_schedule;
		1292	coroapi.save = api_save;
1214	coroapi.cede = api_cede;	1293	coroapi.cede = api_cede;
		1294	coroapi.cede_notself = api_cede_notself;
1215	coroapi.ready = api_ready;	1295	coroapi.ready = api_ready;
		1296	coroapi.is_ready = api_is_ready;
1216	coroapi.nready = &coro_nready;	1297	coroapi.nready = &coro_nready;
1217	coroapi.current = coro_current;	1298	coroapi.current = coro_current;
1218		1299
1219	GCoroAPI = &coroapi;	1300	GCoroAPI = &coroapi;
1220	sv_setiv (sv, (IV)&coroapi);	1301	sv_setiv (sv, (IV)&coroapi);
1221	SvREADONLY_on (sv);	1302	SvREADONLY_on (sv);
1222	}	1303	}
1223	}	1304	}
		1305
		1306	void
		1307	_set_current (SV *current)
		1308	PROTOTYPE: $
		1309	CODE:
		1310	SvREFCNT_dec (SvRV (coro_current));
		1311	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1224		1312
1225	int	1313	int
1226	prio (Coro::State coro, int newprio = 0)	1314	prio (Coro::State coro, int newprio = 0)
1227	ALIAS:	1315	ALIAS:
1228	nice = 1	1316	nice = 1
…		…
1231	RETVAL = coro->prio;	1319	RETVAL = coro->prio;
1232		1320
1233	if (items > 1)	1321	if (items > 1)
1234	{	1322	{
1235	if (ix)	1323	if (ix)
1236	newprio += coro->prio;	1324	newprio = coro->prio - newprio;
1237		1325
1238	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1326	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1239	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1327	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1240		1328
1241	coro->prio = newprio;	1329	coro->prio = newprio;
1242	}	1330	}
1243	}	1331	}
		1332	OUTPUT:
		1333	RETVAL
1244		1334
1245	void	1335	SV *
1246	ready (SV *self)	1336	ready (SV *self)
1247	PROTOTYPE: $	1337	PROTOTYPE: $
1248	CODE:	1338	CODE:
1249	api_ready (self);	1339	RETVAL = boolSV (api_ready (self));
		1340	OUTPUT:
		1341	RETVAL
		1342
		1343	SV *
		1344	is_ready (SV *self)
		1345	PROTOTYPE: $
		1346	CODE:
		1347	RETVAL = boolSV (api_is_ready (self));
		1348	OUTPUT:
		1349	RETVAL
1250		1350
1251	int	1351	int
1252	nready (...)	1352	nready (...)
1253	PROTOTYPE:	1353	PROTOTYPE:
1254	CODE:	1354	CODE:
…		…
1260		1360
1261	SV *	1361	SV *
1262	_get_state ()	1362	_get_state ()
1263	CODE:	1363	CODE:
1264	{	1364	{
1265	struct {	1365	struct io_state *data;
1266	int errorno;
1267	int laststype;
1268	int laststatval;
1269	Stat_t statcache;
1270	} data;
1271		1366
		1367	RETVAL = newSV (sizeof (struct io_state));
		1368	data = (struct io_state *)SvPVX (RETVAL);
		1369	SvCUR_set (RETVAL, sizeof (struct io_state));
		1370	SvPOK_only (RETVAL);
		1371
1272	data.errorno = errno;	1372	data->errorno = errno;
1273	data.laststype = PL_laststype;	1373	data->laststype = PL_laststype;
1274	data.laststatval = PL_laststatval;	1374	data->laststatval = PL_laststatval;
1275	data.statcache = PL_statcache;	1375	data->statcache = PL_statcache;
1276
1277	RETVAL = newSVpvn ((char *)&data, sizeof data);
1278	}	1376	}
1279	OUTPUT:	1377	OUTPUT:
1280	RETVAL	1378	RETVAL
1281		1379
1282	void	1380	void
1283	_set_state (char *data_)	1381	_set_state (char *data_)
1284	PROTOTYPE: $	1382	PROTOTYPE: $
1285	CODE:	1383	CODE:
1286	{	1384	{
1287	struct {	1385	struct io_state *data = (void *)data_;
1288	int errorno;
1289	int laststype;
1290	int laststatval;
1291	Stat_t statcache;
1292	} *data = (void *)data_;
1293		1386
1294	errno = data->errorno;	1387	errno = data->errorno;
1295	PL_laststype = data->laststype;	1388	PL_laststype = data->laststype;
1296	PL_laststatval = data->laststatval;	1389	PL_laststatval = data->laststatval;
1297	PL_statcache = data->statcache;	1390	PL_statcache = data->statcache;
1298	}	1391	}
		1392

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