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Comparing Coro/Coro/State.xs (file contents):
Revision 1.106 by root, Mon Nov 27 02:08:55 2006 UTC vs.
Revision 1.136 by root, Fri Jan 12 01:05:55 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
		131	static struct coro_cctx *cctx_first;
		132	static int cctx_count, cctx_idle;
		133
108	/* this is a structure representing a c-level coroutine */	134	/* this is a structure representing a c-level coroutine */
109	typedef struct coro_cctx {	135	typedef struct coro_cctx {
110	struct coro_cctx *next;	136	struct coro_cctx *next;
111		137
112	/* the stack */	138	/* the stack */
113	void *sptr;	139	void *sptr;
114	long ssize; /* positive == mmap, otherwise malloc */	140	long ssize; /* positive == mmap, otherwise malloc */
115		141
116	/* cpu state */	142	/* cpu state */
117	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 */
118	JMPENV *top_env;	145	JMPENV *top_env;
119	coro_context cctx;	146	coro_context cctx;
120		147
		148	int inuse;
		149
121	#if USE_VALGRIND	150	#if USE_VALGRIND
122	int valgrind_id;	151	int valgrind_id;
123	#endif	152	#endif
124	} 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	};
125		161
126	/* this is a structure representing a perl-level coroutine */	162	/* this is a structure representing a perl-level coroutine */
127	struct coro {	163	struct coro {
128	/* the c coroutine allocated to this perl coroutine, if any */	164	/* the c coroutine allocated to this perl coroutine, if any */
129	coro_cctx *cctx;	165	coro_cctx *cctx;
130		166
131	/* data associated with this coroutine (initial args) */	167	/* data associated with this coroutine (initial args) */
132	AV *args;	168	AV *args;
133	int refcnt;	169	int refcnt;
		170	int save; /* CORO_SAVE flags */
		171	int flags; /* CF_ flags */
134		172
135	/* optionally saved, might be zero */	173	/* optionally saved, might be zero */
136	AV *defav;	174	AV *defav; /* @_ */
137	SV *defsv;	175	SV *defsv; /* $_ */
138	SV *errsv;	176	SV *errsv; /* $@ */
		177	SV *irssv; /* $/ */
		178	SV *irssv_sv; /* real $/ cache */
139		179
140	/* saved global state not related to stacks */	180	#define VAR(name,type) type name;
141	U8 dowarn;	181	# include "state.h"
142	I32 in_eval;	182	#undef VAR
143
144	/* the stacks and related info (callchain etc..) */
145	PERL_SI *curstackinfo;
146	AV *curstack;
147	AV *mainstack;
148	SV **stack_sp;
149	OP *op;
150	SV **curpad;
151	AV *comppad;
152	CV *compcv;
153	SV **stack_base;
154	SV **stack_max;
155	SV **tmps_stack;
156	I32 tmps_floor;
157	I32 tmps_ix;
158	I32 tmps_max;
159	I32 *markstack;
160	I32 *markstack_ptr;
161	I32 *markstack_max;
162	I32 *scopestack;
163	I32 scopestack_ix;
164	I32 scopestack_max;
165	ANY *savestack;
166	I32 savestack_ix;
167	I32 savestack_max;
168	OP **retstack;
169	I32 retstack_ix;
170	I32 retstack_max;
171	PMOP *curpm;
172	COP *curcop;
173		183
174	/* coro process data */	184	/* coro process data */
175	int prio;	185	int prio;
176	};	186	};
177		187
…		…
241		251
242	#define PERL_MAGIC_coro PERL_MAGIC_ext	252	#define PERL_MAGIC_coro PERL_MAGIC_ext
243		253
244	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	254	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
245		255
		256	#define CORO_MAGIC(cv) \
		257	SvMAGIC (cv) \
		258	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		259	? SvMAGIC (cv) \
		260	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		261	: 0
		262
246	/* the next two functions merely cache the padlists */	263	/* the next two functions merely cache the padlists */
247	static void	264	static void
248	get_padlist (CV *cv)	265	get_padlist (CV *cv)
249	{	266	{
250	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	267	MAGIC *mg = CORO_MAGIC (cv);
		268	AV *av;
251		269
252	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	270	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
253	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	271	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
254	else	272	else
255	{	273	{
256	#if 0	274	#if PREFER_PERL_FUNCTIONS
257	/* this is probably cleaner, but also slower? */	275	/* this is probably cleaner, but also slower? */
258	CV *cp = Perl_cv_clone (cv);	276	CV *cp = Perl_cv_clone (cv);
259	CvPADLIST (cv) = CvPADLIST (cp);	277	CvPADLIST (cv) = CvPADLIST (cp);
260	CvPADLIST (cp) = 0;	278	CvPADLIST (cp) = 0;
261	SvREFCNT_dec (cp);	279	SvREFCNT_dec (cp);
…		…
266	}	284	}
267		285
268	static void	286	static void
269	put_padlist (CV *cv)	287	put_padlist (CV *cv)
270	{	288	{
271	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	289	MAGIC *mg = CORO_MAGIC (cv);
		290	AV *av;
272		291
273	if (!mg)	292	if (!mg)
274	{	293	{
275	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	294	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
276	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	295	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
277	mg->mg_virtual = &vtbl_coro;	296	mg->mg_virtual = &vtbl_coro;
278	mg->mg_obj = (SV *)newAV ();	297	mg->mg_obj = (SV *)newAV ();
279	}	298	}
280		299
281	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	300	av = (AV *)mg->mg_obj;
		301
		302	if (AvFILLp (av) >= AvMAX (av))
		303	av_extend (av, AvMAX (av) + 1);
		304
		305	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
282	}	306	}
283		307
284	#define SB do {	308	#define SB do {
285	#define SE } while (0)	309	#define SE } while (0)
286		310
287	#define LOAD(state) load_state((state));
288	#define SAVE(state,flags) save_state((state),(flags));
289
290	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	311	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
291		312
292	static void	313	static void
293	load_state(Coro__State c)	314	load_perl (Coro__State c)
294	{	315	{
295	PL_dowarn = c->dowarn;	316	#define VAR(name,type) PL_ ## name = c->name;
296	PL_in_eval = c->in_eval;	317	# include "state.h"
297		318	#undef VAR
298	PL_curstackinfo = c->curstackinfo;
299	PL_curstack = c->curstack;
300	PL_mainstack = c->mainstack;
301	PL_stack_sp = c->stack_sp;
302	PL_op = c->op;
303	PL_curpad = c->curpad;
304	PL_comppad = c->comppad;
305	PL_compcv = c->compcv;
306	PL_stack_base = c->stack_base;
307	PL_stack_max = c->stack_max;
308	PL_tmps_stack = c->tmps_stack;
309	PL_tmps_floor = c->tmps_floor;
310	PL_tmps_ix = c->tmps_ix;
311	PL_tmps_max = c->tmps_max;
312	PL_markstack = c->markstack;
313	PL_markstack_ptr = c->markstack_ptr;
314	PL_markstack_max = c->markstack_max;
315	PL_scopestack = c->scopestack;
316	PL_scopestack_ix = c->scopestack_ix;
317	PL_scopestack_max = c->scopestack_max;
318	PL_savestack = c->savestack;
319	PL_savestack_ix = c->savestack_ix;
320	PL_savestack_max = c->savestack_max;
321	#if !PERL_VERSION_ATLEAST (5,9,0)
322	PL_retstack = c->retstack;
323	PL_retstack_ix = c->retstack_ix;
324	PL_retstack_max = c->retstack_max;
325	#endif
326	PL_curpm = c->curpm;
327	PL_curcop = c->curcop;
328		319
329	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	320	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
330	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	321	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
331	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	322	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		323	if (c->irssv)
		324	{
		325	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		326	SvREFCNT_dec (c->irssv);
		327	else
		328	{
		329	REPLACE_SV (PL_rs, c->irssv);
		330	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		331	sv_setsv (c->irssv_sv, PL_rs);
		332	}
		333	}
332		334
333	{	335	{
334	dSP;	336	dSP;
335	CV *cv;	337	CV *cv;
336		338
337	/* now do the ugly restore mess */	339	/* now do the ugly restore mess */
338	while ((cv = (CV *)POPs))	340	while ((cv = (CV *)POPs))
339	{	341	{
340	AV *padlist = (AV *)POPs;
341
342	if (padlist)
343	{
344	put_padlist (cv); /* mark this padlist as available */	342	put_padlist (cv); /* mark this padlist as available */
345	CvPADLIST(cv) = padlist;	343	CvDEPTH (cv) = PTR2IV (POPs);
346	}	344	CvPADLIST (cv) = (AV *)POPs;
347
348	++CvDEPTH(cv);
349	}	345	}
350		346
351	PUTBACK;	347	PUTBACK;
352	}	348	}
353	}	349	}
354		350
355	static void	351	static void
356	save_state(Coro__State c, int flags)	352	save_perl (Coro__State c)
357	{	353	{
358	{	354	{
359	dSP;	355	dSP;
360	I32 cxix = cxstack_ix;	356	I32 cxix = cxstack_ix;
361	PERL_CONTEXT *ccstk = cxstack;	357	PERL_CONTEXT *ccstk = cxstack;
…		…
364	/*	360	/*
365	* the worst thing you can imagine happens first - we have to save	361	* the worst thing you can imagine happens first - we have to save
366	* (and reinitialize) all cv's in the whole callchain :(	362	* (and reinitialize) all cv's in the whole callchain :(
367	*/	363	*/
368		364
		365	EXTEND (SP, 3 + 1);
369	PUSHs (Nullsv);	366	PUSHs (Nullsv);
370	/* this loop was inspired by pp_caller */	367	/* this loop was inspired by pp_caller */
371	for (;;)	368	for (;;)
372	{	369	{
373	while (cxix >= 0)	370	while (cxix >= 0)
374	{	371	{
375	PERL_CONTEXT *cx = &ccstk[cxix--];	372	PERL_CONTEXT *cx = &ccstk[cxix--];
376		373
377	if (CxTYPE(cx) == CXt_SUB)	374	if (CxTYPE (cx) == CXt_SUB)
378	{	375	{
379	CV *cv = cx->blk_sub.cv;	376	CV *cv = cx->blk_sub.cv;
		377
380	if (CvDEPTH(cv))	378	if (CvDEPTH (cv))
381	{	379	{
382	EXTEND (SP, CvDEPTH(cv)*2);	380	EXTEND (SP, 3);
383
384	while (--CvDEPTH(cv))
385	{
386	/* this tells the restore code to increment CvDEPTH */
387	PUSHs (Nullsv);
388	PUSHs ((SV *)cv);
389	}
390
391	PUSHs ((SV *)CvPADLIST(cv));	381	PUSHs ((SV *)CvPADLIST (cv));
		382	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
392	PUSHs ((SV *)cv);	383	PUSHs ((SV *)cv);
393		384
		385	CvDEPTH (cv) = 0;
394	get_padlist (cv);	386	get_padlist (cv);
395	}	387	}
396	}	388	}
397	#ifdef CXt_FORMAT
398	else if (CxTYPE(cx) == CXt_FORMAT)
399	{
400	/* I never used formats, so how should I know how these are implemented? */
401	/* my bold guess is as a simple, plain sub... */
402	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
403	}
404	#endif
405	}	389	}
406		390
407	if (top_si->si_type == PERLSI_MAIN)	391	if (top_si->si_type == PERLSI_MAIN)
408	break;	392	break;
409		393
…		…
413	}	397	}
414		398
415	PUTBACK;	399	PUTBACK;
416	}	400	}
417		401
418	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	402	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
419	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	403	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
420	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	404	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		405	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
421		406
422	c->dowarn = PL_dowarn;	407	#define VAR(name,type)c->name = PL_ ## name;
423	c->in_eval = PL_in_eval;	408	# include "state.h"
424		409	#undef VAR
425	c->curstackinfo = PL_curstackinfo;
426	c->curstack = PL_curstack;
427	c->mainstack = PL_mainstack;
428	c->stack_sp = PL_stack_sp;
429	c->op = PL_op;
430	c->curpad = PL_curpad;
431	c->comppad = PL_comppad;
432	c->compcv = PL_compcv;
433	c->stack_base = PL_stack_base;
434	c->stack_max = PL_stack_max;
435	c->tmps_stack = PL_tmps_stack;
436	c->tmps_floor = PL_tmps_floor;
437	c->tmps_ix = PL_tmps_ix;
438	c->tmps_max = PL_tmps_max;
439	c->markstack = PL_markstack;
440	c->markstack_ptr = PL_markstack_ptr;
441	c->markstack_max = PL_markstack_max;
442	c->scopestack = PL_scopestack;
443	c->scopestack_ix = PL_scopestack_ix;
444	c->scopestack_max = PL_scopestack_max;
445	c->savestack = PL_savestack;
446	c->savestack_ix = PL_savestack_ix;
447	c->savestack_max = PL_savestack_max;
448	#if !PERL_VERSION_ATLEAST (5,9,0)
449	c->retstack = PL_retstack;
450	c->retstack_ix = PL_retstack_ix;
451	c->retstack_max = PL_retstack_max;
452	#endif
453	c->curpm = PL_curpm;
454	c->curcop = PL_curcop;
455	}	410	}
456		411
457	/*	412	/*
458	* allocate various perl stacks. This is an exact copy	413	* allocate various perl stacks. This is an exact copy
459	* of perl.c:init_stacks, except that it uses less memory	414	* of perl.c:init_stacks, except that it uses less memory
460	* on the (sometimes correct) assumption that coroutines do	415	* on the (sometimes correct) assumption that coroutines do
461	* not usually need a lot of stackspace.	416	* not usually need a lot of stackspace.
462	*/	417	*/
		418	#if PREFER_PERL_FUNCTIONS
		419	# define coro_init_stacks init_stacks
		420	#else
463	static void	421	static void
464	coro_init_stacks ()	422	coro_init_stacks ()
465	{	423	{
466	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	424	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
467	PL_curstackinfo->si_type = PERLSI_MAIN;	425	PL_curstackinfo->si_type = PERLSI_MAIN;
468	PL_curstack = PL_curstackinfo->si_stack;	426	PL_curstack = PL_curstackinfo->si_stack;
469	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	427	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
470		428
471	PL_stack_base = AvARRAY(PL_curstack);	429	PL_stack_base = AvARRAY(PL_curstack);
472	PL_stack_sp = PL_stack_base;	430	PL_stack_sp = PL_stack_base;
473	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	431	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
474		432
475	New(50,PL_tmps_stack,96,SV*);	433	New(50,PL_tmps_stack,128,SV*);
476	PL_tmps_floor = -1;	434	PL_tmps_floor = -1;
477	PL_tmps_ix = -1;	435	PL_tmps_ix = -1;
478	PL_tmps_max = 96;	436	PL_tmps_max = 128;
479		437
480	New(54,PL_markstack,16,I32);	438	New(54,PL_markstack,32,I32);
481	PL_markstack_ptr = PL_markstack;	439	PL_markstack_ptr = PL_markstack;
482	PL_markstack_max = PL_markstack + 16;	440	PL_markstack_max = PL_markstack + 32;
483		441
484	#ifdef SET_MARK_OFFSET	442	#ifdef SET_MARK_OFFSET
485	SET_MARK_OFFSET;	443	SET_MARK_OFFSET;
486	#endif	444	#endif
487		445
488	New(54,PL_scopestack,16,I32);	446	New(54,PL_scopestack,32,I32);
489	PL_scopestack_ix = 0;	447	PL_scopestack_ix = 0;
490	PL_scopestack_max = 16;	448	PL_scopestack_max = 32;
491		449
492	New(54,PL_savestack,96,ANY);	450	New(54,PL_savestack,64,ANY);
493	PL_savestack_ix = 0;	451	PL_savestack_ix = 0;
494	PL_savestack_max = 96;	452	PL_savestack_max = 64;
495		453
496	#if !PERL_VERSION_ATLEAST (5,9,0)	454	#if !PERL_VERSION_ATLEAST (5,9,0)
497	New(54,PL_retstack,8,OP*);	455	New(54,PL_retstack,16,OP*);
498	PL_retstack_ix = 0;	456	PL_retstack_ix = 0;
499	PL_retstack_max = 8;	457	PL_retstack_max = 16;
500	#endif	458	#endif
501	}	459	}
		460	#endif
502		461
503	/*	462	/*
504	* destroy the stacks, the callchain etc...	463	* destroy the stacks, the callchain etc...
505	*/	464	*/
506	static void	465	static void
507	coro_destroy_stacks ()	466	coro_destroy_stacks ()
508	{	467	{
509	if (!IN_DESTRUCT)	468	if (!IN_DESTRUCT)
510	{	469	{
511	/* is this ugly, I ask? */	470	/* restore all saved variables and stuff */
512	LEAVE_SCOPE (0);	471	LEAVE_SCOPE (0);
		472	assert (PL_tmps_floor == -1);
513		473
514	/* sure it is, but more important: is it correct?? :/ */	474	/* free all temporaries */
515	FREETMPS;	475	FREETMPS;
		476	assert (PL_tmps_ix == -1);
516		477
		478	/* unwind all extra stacks */
517	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	479	POPSTACK_TO (PL_mainstack);
		480
		481	/* unwind main stack */
		482	dounwind (-1);
518	}	483	}
519		484
520	while (PL_curstackinfo->si_next)	485	while (PL_curstackinfo->si_next)
521	PL_curstackinfo = PL_curstackinfo->si_next;	486	PL_curstackinfo = PL_curstackinfo->si_next;
522		487
523	while (PL_curstackinfo)	488	while (PL_curstackinfo)
524	{	489	{
525	PERL_SI *p = PL_curstackinfo->si_prev;	490	PERL_SI *p = PL_curstackinfo->si_prev;
526		491
527	{ /*D*//*remove*/
528	dSP;
529	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
530	PUTBACK; /* possibly superfluous */
531	}
532
533	if (!IN_DESTRUCT)	492	if (!IN_DESTRUCT)
534	{
535	dounwind (-1);/*D*//*remove*/
536	SvREFCNT_dec (PL_curstackinfo->si_stack);	493	SvREFCNT_dec (PL_curstackinfo->si_stack);
537	}
538		494
539	Safefree (PL_curstackinfo->si_cxstack);	495	Safefree (PL_curstackinfo->si_cxstack);
540	Safefree (PL_curstackinfo);	496	Safefree (PL_curstackinfo);
541	PL_curstackinfo = p;	497	PL_curstackinfo = p;
542	}	498	}
…		…
557	* emulate part of the perl startup here.	513	* emulate part of the perl startup here.
558	*/	514	*/
559		515
560	coro_init_stacks ();	516	coro_init_stacks ();
561		517
562	PL_curcop = 0;	518	PL_curcop = &PL_compiling;
563	PL_in_eval = 0;	519	PL_in_eval = EVAL_NULL;
564	PL_curpm = 0;	520	PL_curpm = 0;
		521	PL_localizing = 0;
		522	PL_dirty = 0;
		523	PL_restartop = 0;
565		524
566	{	525	{
567	dSP;	526	dSP;
568	LOGOP myop;	527	LOGOP myop;
569		528
570	/* I have no idea why this is needed, but it is */
571	PUSHMARK (SP);
572
573	SvREFCNT_dec (GvAV (PL_defgv));	529	SvREFCNT_dec (GvAV (PL_defgv));
574	GvAV (PL_defgv) = coro->args; coro->args = 0;	530	GvAV (PL_defgv) = coro->args; coro->args = 0;
575		531
576	Zero (&myop, 1, LOGOP);	532	Zero (&myop, 1, LOGOP);
577	myop.op_next = Nullop;	533	myop.op_next = Nullop;
578	myop.op_flags = OPf_WANT_VOID;	534	myop.op_flags = OPf_WANT_VOID;
579		535
		536	PUSHMARK (SP);
		537	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		538	PUTBACK;
580	PL_op = (OP *)&myop;	539	PL_op = (OP *)&myop;
581
582	PUSHMARK (SP);
583	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
584	PUTBACK;
585	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	540	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
586	SPAGAIN;	541	SPAGAIN;
587
588	ENTER; /* necessary e.g. for dounwind */
589	}	542	}
		543
		544	ENTER; /* necessary e.g. for dounwind */
590	}	545	}
591		546
592	static void	547	static void
593	free_coro_mortal ()	548	free_coro_mortal ()
594	{	549	{
…		…
597	SvREFCNT_dec (coro_mortal);	552	SvREFCNT_dec (coro_mortal);
598	coro_mortal = 0;	553	coro_mortal = 0;
599	}	554	}
600	}	555	}
601		556
		557	/* inject a fake call to Coro::State::_cctx_init into the execution */
602	static void NOINLINE	558	static void NOINLINE
603	prepare_cctx (coro_cctx *cctx)	559	prepare_cctx (coro_cctx *cctx)
604	{	560	{
605	dSP;	561	dSP;
606	LOGOP myop;	562	LOGOP myop;
607		563
608	Zero (&myop, 1, LOGOP);	564	Zero (&myop, 1, LOGOP);
609	myop.op_next = PL_op;	565	myop.op_next = PL_op;
610	myop.op_flags = OPf_WANT_VOID;	566	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
611
612	sv_setiv (get_sv ("Coro::State::cctx", FALSE), PTR2IV (cctx));
613		567
614	PUSHMARK (SP);	568	PUSHMARK (SP);
		569	EXTEND (SP, 2);
		570	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
615	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	571	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
616	PUTBACK;	572	PUTBACK;
		573	PL_op = (OP *)&myop;
617	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
618	SPAGAIN;	575	SPAGAIN;
619	}	576	}
620		577
621	static void	578	static void
622	coro_run (void *arg)	579	coro_run (void *arg)
623	{	580	{
624	/* coro_run is the alternative epilogue of transfer() */	581	/* coro_run is the alternative tail of transfer(), so unlock here. */
625	UNLOCK;	582	UNLOCK;
626		583
627	/*	584	/*
628	* this is a _very_ stripped down perl interpreter ;)	585	* this is a _very_ stripped down perl interpreter ;)
629	*/	586	*/
630	PL_top_env = &PL_start_env;	587	PL_top_env = &PL_start_env;
		588
631	/* inject call to cctx_init */	589	/* inject call to cctx_init */
632	prepare_cctx ((coro_cctx *)arg);	590	prepare_cctx ((coro_cctx *)arg);
633		591
634	/* somebody will hit me for both perl_run and PL_restartop */	592	/* somebody will hit me for both perl_run and PL_restartop */
		593	PL_restartop = PL_op;
635	perl_run (PL_curinterp);	594	perl_run (PL_curinterp);
636		595
637	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	596	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
638	abort ();	597	abort ();
639	}	598	}
…		…
641	static coro_cctx *	600	static coro_cctx *
642	cctx_new ()	601	cctx_new ()
643	{	602	{
644	coro_cctx *cctx;	603	coro_cctx *cctx;
645		604
		605	++cctx_count;
		606
646	New (0, cctx, 1, coro_cctx);	607	Newz (0, cctx, 1, coro_cctx);
647		608
648	#if HAVE_MMAP	609	#if HAVE_MMAP
649		610
650	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	611	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
651	/* mmap suppsedly does allocate-on-write for us */	612	/* mmap supposedly does allocate-on-write for us */
652	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	613	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
653		614
654	if (cctx->sptr == (void *)-1)	615	if (cctx->sptr == (void *)-1)
655	{	616	{
656	perror ("FATAL: unable to mmap stack for coroutine");	617	perror ("FATAL: unable to mmap stack for coroutine");
…		…
685		646
686	return cctx;	647	return cctx;
687	}	648	}
688		649
689	static void	650	static void
690	cctx_free (coro_cctx *cctx)	651	cctx_destroy (coro_cctx *cctx)
691	{	652	{
692	if (!cctx)	653	if (!cctx)
693	return;	654	return;
		655
		656	--cctx_count;
694		657
695	#if USE_VALGRIND	658	#if USE_VALGRIND
696	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	659	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
697	#endif	660	#endif
698		661
…		…
703	#endif	666	#endif
704		667
705	Safefree (cctx);	668	Safefree (cctx);
706	}	669	}
707		670
708	static coro_cctx *cctx_first;
709	static int cctx_count, cctx_idle;
710
711	static coro_cctx *	671	static coro_cctx *
712	cctx_get ()	672	cctx_get ()
713	{	673	{
714	coro_cctx *cctx;	674	coro_cctx *cctx;
715		675
716	if (cctx_first)	676	if (cctx_first)
717	{	677	{
718	--cctx_idle;
719	cctx = cctx_first;	678	cctx = cctx_first;
720	cctx_first = cctx->next;	679	cctx_first = cctx->next;
		680	--cctx_idle;
721	}	681	}
722	else	682	else
723	{	683	{
724	++cctx_count;
725	cctx = cctx_new ();	684	cctx = cctx_new ();
726	PL_op = PL_op->op_next;	685	PL_op = PL_op->op_next;
727	}	686	}
728		687
729	return cctx;	688	return cctx;
730	}	689	}
731		690
732	static void	691	static void
733	cctx_put (coro_cctx *cctx)	692	cctx_put (coro_cctx *cctx)
734	{	693	{
		694	/* free another cctx if overlimit */
		695	if (cctx_idle >= MAX_IDLE_CCTX)
		696	{
		697	coro_cctx *first = cctx_first;
		698	cctx_first = first->next;
		699	--cctx_idle;
		700
		701	assert (!first->inuse);
		702	cctx_destroy (first);
		703	}
		704
735	++cctx_idle;	705	++cctx_idle;
736	cctx->next = cctx_first;	706	cctx->next = cctx_first;
737	cctx_first = cctx;	707	cctx_first = cctx;
738	}	708	}
739		709
740	/* never call directly, always through the coro_state_transfer global variable */	710	/* never call directly, always through the coro_state_transfer global variable */
741	static void NOINLINE	711	static void NOINLINE
742	transfer (struct coro *prev, struct coro *next, int flags)	712	transfer (struct coro *prev, struct coro *next)
743	{	713	{
744	dSTACKLEVEL;	714	dSTACKLEVEL;
745		715
746	/* sometimes transfer is only called to set idle_sp */	716	/* sometimes transfer is only called to set idle_sp */
747	if (flags == TRANSFER_SET_STACKLEVEL)	717	if (!next)
		718	{
748	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	719	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		720	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		721	}
749	else if (prev != next)	722	else if (prev != next)
750	{	723	{
751	coro_cctx *prev__cctx;	724	coro_cctx *prev__cctx;
752		725
		726	if (prev->flags & CF_NEW)
		727	{
		728	/* create a new empty context */
		729	Newz (0, prev->cctx, 1, coro_cctx);
		730	prev->cctx->inuse = 1;
		731	prev->flags &= ~CF_NEW;
		732	prev->flags |= CF_RUNNING;
		733	}
		734
		735	/*TODO: must not croak here */
		736	if (!prev->flags & CF_RUNNING)
		737	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		738
		739	if (next->flags & CF_RUNNING)
		740	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		741
		742	if (next->flags & CF_DESTROYED)
		743	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		744
		745	prev->flags &= ~CF_RUNNING;
		746	next->flags |= CF_RUNNING;
		747
753	LOCK;	748	LOCK;
754		749
755	if (next->mainstack)	750	if (next->flags & CF_NEW)
756	{	751	{
757	/* coroutine already started */	752	/* need to start coroutine */
758	SAVE (prev, flags);	753	next->flags &= ~CF_NEW;
759	LOAD (next);	754	/* first get rid of the old state */
		755	save_perl (prev);
		756	/* setup coroutine call */
		757	setup_coro (next);
		758	/* need a new stack */
		759	assert (!next->cctx);
760	}	760	}
761	else	761	else
762	{	762	{
763	/* need to start coroutine */	763	/* coroutine already started */
764	/* first get rid of the old state */	764	save_perl (prev);
765	SAVE (prev, -1);	765	load_perl (next);
766	/* setup coroutine call */
767	setup_coro (next);
768	/* need a stack */
769	next->cctx = 0;
770	}	766	}
771
772	if (!prev->cctx)
773	/* create a new empty context */
774	Newz (0, prev->cctx, 1, coro_cctx);
775		767
776	prev__cctx = prev->cctx;	768	prev__cctx = prev->cctx;
777		769
778	/* possibly "free" the cctx */	770	/* possibly "free" the cctx */
779	if (prev__cctx->idle_sp == STACKLEVEL)	771	if (prev__cctx->idle_sp == STACKLEVEL)
780	{	772	{
		773	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		774	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		775
		776	prev->cctx = 0;
		777
781	cctx_put (prev__cctx);	778	cctx_put (prev__cctx);
782	prev->cctx = 0;	779	prev__cctx->inuse = 0;
783	}	780	}
784		781
785	if (!next->cctx)	782	if (!next->cctx)
		783	{
786	next->cctx = cctx_get ();	784	next->cctx = cctx_get ();
		785	assert (!next->cctx->inuse);
		786	next->cctx->inuse = 1;
		787	}
787		788
788	if (prev__cctx != next->cctx)	789	if (prev__cctx != next->cctx)
789	{	790	{
790	prev__cctx->top_env = PL_top_env;	791	prev__cctx->top_env = PL_top_env;
791	PL_top_env = next->cctx->top_env;	792	PL_top_env = next->cctx->top_env;
792	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	793	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
793	}	794	}
794		795
795	free_coro_mortal ();	796	free_coro_mortal ();
796
797	UNLOCK;	797	UNLOCK;
798	}	798	}
799	}	799	}
800		800
801	struct transfer_args	801	struct transfer_args
802	{	802	{
803	struct coro *prev, *next;	803	struct coro *prev, *next;
804	int flags;
805	};	804	};
806		805
807	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	806	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
808		807
809	static void	808	static int
810	coro_state_destroy (struct coro *coro)	809	coro_state_destroy (struct coro *coro)
811	{	810	{
812	if (coro->refcnt--)	811	if (coro->flags & CF_DESTROYED)
813	return;	812	return 0;
		813
		814	coro->flags |= CF_DESTROYED;
814		815
815	if (coro->mainstack && coro->mainstack != main_mainstack)	816	if (coro->mainstack && coro->mainstack != main_mainstack)
816	{	817	{
		818	assert (!(coro->flags & CF_RUNNING));
		819
817	struct coro temp;	820	struct coro temp;
		821	Zero (&temp, 1, struct coro);
		822	temp.save = CORO_SAVE_ALL;
818		823
819	SAVE ((&temp), TRANSFER_SAVE_ALL);	824	if (coro->flags & CF_RUNNING)
820	LOAD (coro);	825	croak ("FATAL: tried to destroy currently running coroutine");
		826
		827	save_perl (&temp);
		828	load_perl (coro);
821		829
822	coro_destroy_stacks ();	830	coro_destroy_stacks ();
823		831
824	LOAD ((&temp)); /* this will get rid of defsv etc.. */	832	load_perl (&temp); /* this will get rid of defsv etc.. */
825		833
826	coro->mainstack = 0;	834	coro->mainstack = 0;
827	}	835	}
828		836
829	cctx_free (coro->cctx);	837	cctx_destroy (coro->cctx);
830	SvREFCNT_dec (coro->args);	838	SvREFCNT_dec (coro->args);
831	Safefree (coro);	839
		840	return 1;
832	}	841	}
833		842
834	static int	843	static int
835	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	844	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
836	{	845	{
837	struct coro *coro = (struct coro *)mg->mg_ptr;	846	struct coro *coro = (struct coro *)mg->mg_ptr;
838	mg->mg_ptr = 0;	847	mg->mg_ptr = 0;
839		848
		849	if (--coro->refcnt < 0)
		850	{
840	coro_state_destroy (coro);	851	coro_state_destroy (coro);
		852	Safefree (coro);
		853	}
841		854
842	return 0;	855	return 0;
843	}	856	}
844		857
845	static int	858	static int
…		…
852	return 0;	865	return 0;
853	}	866	}
854		867
855	static MGVTBL coro_state_vtbl = {	868	static MGVTBL coro_state_vtbl = {
856	0, 0, 0, 0,	869	0, 0, 0, 0,
857	coro_state_clear,	870	coro_state_free,
858	0,	871	0,
859	#ifdef MGf_DUP	872	#ifdef MGf_DUP
860	coro_state_dup,	873	coro_state_dup,
861	#else	874	#else
862	# define MGf_DUP 0	875	# define MGf_DUP 0
…		…
884	assert (mg->mg_type == PERL_MAGIC_ext);	897	assert (mg->mg_type == PERL_MAGIC_ext);
885	return (struct coro *)mg->mg_ptr;	898	return (struct coro *)mg->mg_ptr;
886	}	899	}
887		900
888	static void	901	static void
889	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	902	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
890	{	903	{
891	ta->prev = SvSTATE (prev);	904	ta->prev = SvSTATE (prev_sv);
892	ta->next = SvSTATE (next);	905	ta->next = SvSTATE (next_sv);
893	ta->flags = flags;
894	}	906	}
895		907
896	static void	908	static void
897	api_transfer (SV *prev, SV *next, int flags)	909	api_transfer (SV *prev_sv, SV *next_sv)
898	{	910	{
899	dTHX;
900	struct transfer_args ta;	911	struct transfer_args ta;
901		912
902	prepare_transfer (&ta, prev, next, flags);	913	prepare_transfer (&ta, prev_sv, next_sv);
903	TRANSFER (ta);	914	TRANSFER (ta);
		915	}
		916
		917	static int
		918	api_save (SV *coro_sv, int new_save)
		919	{
		920	struct coro *coro = SvSTATE (coro_sv);
		921	int old_save = coro->save;
		922
		923	if (new_save >= 0)
		924	coro->save = new_save;
		925
		926	return old_save;
904	}	927	}
905		928
906	/** Coro ********************************************************************/	929	/** Coro ********************************************************************/
907		930
908	#define PRIO_MAX 3	931	#define PRIO_MAX 3
…		…
911	#define PRIO_LOW -1	934	#define PRIO_LOW -1
912	#define PRIO_IDLE -3	935	#define PRIO_IDLE -3
913	#define PRIO_MIN -4	936	#define PRIO_MIN -4
914		937
915	/* for Coro.pm */	938	/* for Coro.pm */
916	static GV *coro_current, *coro_idle;	939	static SV *coro_current;
917	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	940	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
918	static int coro_nready;	941	static int coro_nready;
919		942
920	static void	943	static void
921	coro_enq (SV *sv)	944	coro_enq (SV *coro_sv)
922	{	945	{
923	int prio;
924
925	if (SvTYPE (sv) != SVt_PVHV)
926	croak ("Coro::ready tried to enqueue something that is not a coroutine");
927
928	prio = SvSTATE (sv)->prio;
929
930	av_push (coro_ready [prio - PRIO_MIN], sv);	946	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
931	coro_nready++;	947	coro_nready++;
932	}	948	}
933		949
934	static SV *	950	static SV *
935	coro_deq (int min_prio)	951	coro_deq (int min_prio)
…		…
948	}	964	}
949		965
950	return 0;	966	return 0;
951	}	967	}
952		968
953	static void	969	static int
954	api_ready (SV *coro)	970	api_ready (SV *coro_sv)
955	{	971	{
956	dTHX;	972	struct coro *coro;
957		973
958	if (SvROK (coro))	974	if (SvROK (coro_sv))
959	coro = SvRV (coro);	975	coro_sv = SvRV (coro_sv);
		976
		977	coro = SvSTATE (coro_sv);
		978
		979	if (coro->flags & CF_READY)
		980	return 0;
		981
		982	coro->flags |= CF_READY;
960		983
961	LOCK;	984	LOCK;
962	coro_enq (SvREFCNT_inc (coro));	985	coro_enq (SvREFCNT_inc (coro_sv));
963	UNLOCK;	986	UNLOCK;
		987
		988	return 1;
		989	}
		990
		991	static int
		992	api_is_ready (SV *coro_sv)
		993	{
		994	return !!(SvSTATE (coro_sv)->flags & CF_READY);
964	}	995	}
965		996
966	static void	997	static void
967	prepare_schedule (struct transfer_args *ta)	998	prepare_schedule (struct transfer_args *ta)
968	{	999	{
969	SV *current, *prev, *next;	1000	SV *prev_sv, *next_sv;
970
971	current = GvSV (coro_current);
972		1001
973	for (;;)	1002	for (;;)
974	{	1003	{
975	LOCK;	1004	LOCK;
976	next = coro_deq (PRIO_MIN);	1005	next_sv = coro_deq (PRIO_MIN);
977	UNLOCK;	1006	UNLOCK;
978		1007
		1008	/* nothing to schedule: call the idle handler */
979	if (next)	1009	if (!next_sv)
980	break;
981
982	{	1010	{
983	dSP;	1011	dSP;
984		1012
985	ENTER;	1013	ENTER;
986	SAVETMPS;	1014	SAVETMPS;
987		1015
988	PUSHMARK (SP);	1016	PUSHMARK (SP);
989	PUTBACK;	1017	PUTBACK;
990	call_sv (GvSV (coro_idle), G_DISCARD);	1018	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
991		1019
992	FREETMPS;	1020	FREETMPS;
993	LEAVE;	1021	LEAVE;
		1022	continue;
994	}	1023	}
995	}
996		1024
997	prev = SvRV (current);	1025	ta->next = SvSTATE (next_sv);
998	SvRV (current) = next;	1026
		1027	/* cannot transfer to destroyed coros, skip and look for next */
		1028	if (ta->next->flags & CF_DESTROYED)
		1029	{
		1030	SvREFCNT_dec (next_sv);
		1031	continue;
		1032	}
		1033
		1034	break;
		1035	}
999		1036
1000	/* free this only after the transfer */	1037	/* free this only after the transfer */
		1038	prev_sv = SvRV (coro_current);
		1039	SvRV_set (coro_current, next_sv);
		1040	ta->prev = SvSTATE (prev_sv);
		1041
		1042	assert (ta->next->flags & CF_READY);
		1043	ta->next->flags &= ~CF_READY;
		1044
1001	LOCK;	1045	LOCK;
1002	free_coro_mortal ();	1046	free_coro_mortal ();
		1047	coro_mortal = prev_sv;
1003	UNLOCK;	1048	UNLOCK;
1004	coro_mortal = prev;
1005
1006	ta->prev = SvSTATE (prev);
1007	ta->next = SvSTATE (next);
1008	ta->flags = TRANSFER_SAVE_ALL;
1009	}	1049	}
1010		1050
1011	static void	1051	static void
1012	prepare_cede (struct transfer_args *ta)	1052	prepare_cede (struct transfer_args *ta)
1013	{	1053	{
1014	LOCK;	1054	api_ready (coro_current);
1015	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1016	UNLOCK;
1017
1018	prepare_schedule (ta);	1055	prepare_schedule (ta);
1019	}	1056	}
1020		1057
		1058	static int
		1059	prepare_cede_notself (struct transfer_args *ta)
		1060	{
		1061	if (coro_nready)
		1062	{
		1063	SV *prev = SvRV (coro_current);
		1064	prepare_schedule (ta);
		1065	api_ready (prev);
		1066	return 1;
		1067	}
		1068	else
		1069	return 0;
		1070	}
		1071
1021	static void	1072	static void
1022	api_schedule (void)	1073	api_schedule (void)
1023	{	1074	{
1024	dTHX;
1025	struct transfer_args ta;	1075	struct transfer_args ta;
1026		1076
1027	prepare_schedule (&ta);	1077	prepare_schedule (&ta);
1028	TRANSFER (ta);	1078	TRANSFER (ta);
1029	}	1079	}
1030		1080
1031	static void	1081	static int
1032	api_cede (void)	1082	api_cede (void)
1033	{	1083	{
1034	dTHX;
1035	struct transfer_args ta;	1084	struct transfer_args ta;
1036		1085
1037	prepare_cede (&ta);	1086	prepare_cede (&ta);
		1087
		1088	if (ta.prev != ta.next)
		1089	{
1038	TRANSFER (ta);	1090	TRANSFER (ta);
		1091	return 1;
		1092	}
		1093	else
		1094	return 0;
		1095	}
		1096
		1097	static int
		1098	api_cede_notself (void)
		1099	{
		1100	struct transfer_args ta;
		1101
		1102	if (prepare_cede_notself (&ta))
		1103	{
		1104	TRANSFER (ta);
		1105	return 1;
		1106	}
		1107	else
		1108	return 0;
1039	}	1109	}
1040		1110
1041	MODULE = Coro::State PACKAGE = Coro::State	1111	MODULE = Coro::State PACKAGE = Coro::State
1042		1112
1043	PROTOTYPES: DISABLE	1113	PROTOTYPES: DISABLE
…		…
1049	#endif	1119	#endif
1050	BOOT_PAGESIZE;	1120	BOOT_PAGESIZE;
1051		1121
1052	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1122	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1053		1123
1054	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1124	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1055	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1125	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1056	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1126	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1127	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1128	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1057		1129
1058	main_mainstack = PL_mainstack;	1130	main_mainstack = PL_mainstack;
1059		1131
1060	coroapi.ver = CORO_API_VERSION;	1132	coroapi.ver = CORO_API_VERSION;
1061	coroapi.transfer = api_transfer;	1133	coroapi.transfer = api_transfer;
…		…
1071	HV *hv;	1143	HV *hv;
1072	int i;	1144	int i;
1073		1145
1074	Newz (0, coro, 1, struct coro);	1146	Newz (0, coro, 1, struct coro);
1075	coro->args = newAV ();	1147	coro->args = newAV ();
		1148	coro->save = CORO_SAVE_ALL;
		1149	coro->flags = CF_NEW;
1076		1150
1077	hv = newHV ();	1151	hv = newHV ();
1078	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1152	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1079	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1153	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1080		1154
1081	for (i = 1; i < items; i++)	1155	for (i = 1; i < items; i++)
1082	av_push (coro->args, newSVsv (ST (i)));	1156	av_push (coro->args, newSVsv (ST (i)));
1083	}	1157	}
1084	OUTPUT:	1158	OUTPUT:
		1159	RETVAL
		1160
		1161	int
		1162	save (SV *coro, int new_save = -1)
		1163	CODE:
		1164	RETVAL = api_save (coro, new_save);
		1165	OUTPUT:
1085	RETVAL	1166	RETVAL
1086		1167
1087	void	1168	void
1088	_set_stacklevel (...)	1169	_set_stacklevel (...)
1089	ALIAS:	1170	ALIAS:
1090	Coro::State::transfer = 1	1171	Coro::State::transfer = 1
1091	Coro::schedule = 2	1172	Coro::schedule = 2
1092	Coro::cede = 3	1173	Coro::cede = 3
1093	Coro::Cont::yield = 4	1174	Coro::cede_notself = 4
1094	CODE:	1175	CODE:
1095	{	1176	{
1096	struct transfer_args ta;	1177	struct transfer_args ta;
1097		1178
1098	switch (ix)	1179	switch (ix)
1099	{	1180	{
1100	case 0:	1181	case 0:
1101	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1182	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1102	ta.next = 0;	1183	ta.next = 0;
1103	ta.flags = TRANSFER_SET_STACKLEVEL;
1104	break;	1184	break;
1105		1185
1106	case 1:	1186	case 1:
1107	if (items != 3)	1187	if (items != 2)
1108	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1188	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1109		1189
1110	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1190	prepare_transfer (&ta, ST (0), ST (1));
1111	break;	1191	break;
1112		1192
1113	case 2:	1193	case 2:
1114	prepare_schedule (&ta);	1194	prepare_schedule (&ta);
1115	break;	1195	break;
…		…
1117	case 3:	1197	case 3:
1118	prepare_cede (&ta);	1198	prepare_cede (&ta);
1119	break;	1199	break;
1120		1200
1121	case 4:	1201	case 4:
1122	{	1202	if (!prepare_cede_notself (&ta))
1123	SV *yieldstack;	1203	XSRETURN_EMPTY;
1124	SV *sv;
1125	AV *defav = GvAV (PL_defgv);
1126		1204
1127	yieldstack = *hv_fetch (
1128	(HV *)SvRV (GvSV (coro_current)),
1129	"yieldstack", sizeof ("yieldstack") - 1,
1130	0
1131	);
1132
1133	/* set up @_ -- ugly */
1134	av_clear (defav);
1135	av_fill (defav, items - 1);
1136	while (items--)
1137	av_store (defav, items, SvREFCNT_inc (ST(items)));
1138
1139	sv = av_pop ((AV *)SvRV (yieldstack));
1140	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1141	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1142	ta.flags = 0;
1143	SvREFCNT_dec (sv);
1144	}
1145	break;	1205	break;
1146
1147	}	1206	}
1148		1207
		1208	BARRIER;
1149	TRANSFER (ta);	1209	TRANSFER (ta);
1150	}
1151		1210
1152	void	1211	if (GIMME_V != G_VOID && ta.next != ta.prev)
1153	_clone_state_from (SV *dst, SV *src)	1212	XSRETURN_YES;
		1213	}
		1214
		1215	bool
		1216	_destroy (SV *coro_sv)
1154	CODE:	1217	CODE:
1155	{	1218	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1156	struct coro *coro_src = SvSTATE (src);	1219	OUTPUT:
1157		1220	RETVAL
1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1159
1160	++coro_src->refcnt;
1161	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1162	}
1163		1221
1164	void	1222	void
1165	_exit (code)	1223	_exit (code)
1166	int code	1224	int code
1167	PROTOTYPE: $	1225	PROTOTYPE: $
…		…
1195	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1253	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1196	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1254	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1197	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1255	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1198	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1256	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1199		1257
1200	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1258	coro_current = get_sv ("Coro::current", FALSE);
1201	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1259	SvREADONLY_on (coro_current);
1202		1260
1203	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1261	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1204	coro_ready[i] = newAV ();	1262	coro_ready[i] = newAV ();
1205		1263
1206	{	1264	{
1207	SV *sv = perl_get_sv("Coro::API", 1);	1265	SV *sv = perl_get_sv("Coro::API", 1);
1208		1266
1209	coroapi.schedule = api_schedule;	1267	coroapi.schedule = api_schedule;
		1268	coroapi.save = api_save;
1210	coroapi.cede = api_cede;	1269	coroapi.cede = api_cede;
		1270	coroapi.cede_notself = api_cede_notself;
1211	coroapi.ready = api_ready;	1271	coroapi.ready = api_ready;
		1272	coroapi.is_ready = api_is_ready;
1212	coroapi.nready = &coro_nready;	1273	coroapi.nready = &coro_nready;
1213	coroapi.current = coro_current;	1274	coroapi.current = coro_current;
1214		1275
1215	GCoroAPI = &coroapi;	1276	GCoroAPI = &coroapi;
1216	sv_setiv (sv, (IV)&coroapi);	1277	sv_setiv (sv, (IV)&coroapi);
1217	SvREADONLY_on (sv);	1278	SvREADONLY_on (sv);
1218	}	1279	}
1219	}	1280	}
		1281
		1282	void
		1283	_set_current (SV *current)
		1284	PROTOTYPE: $
		1285	CODE:
		1286	SvREFCNT_dec (SvRV (coro_current));
		1287	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1220		1288
1221	int	1289	int
1222	prio (Coro::State coro, int newprio = 0)	1290	prio (Coro::State coro, int newprio = 0)
1223	ALIAS:	1291	ALIAS:
1224	nice = 1	1292	nice = 1
…		…
1227	RETVAL = coro->prio;	1295	RETVAL = coro->prio;
1228		1296
1229	if (items > 1)	1297	if (items > 1)
1230	{	1298	{
1231	if (ix)	1299	if (ix)
1232	newprio += coro->prio;	1300	newprio = coro->prio - newprio;
1233		1301
1234	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1302	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1235	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1303	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1236		1304
1237	coro->prio = newprio;	1305	coro->prio = newprio;
1238	}	1306	}
1239	}	1307	}
		1308	OUTPUT:
		1309	RETVAL
1240		1310
1241	void	1311	SV *
1242	ready (SV *self)	1312	ready (SV *self)
1243	PROTOTYPE: $	1313	PROTOTYPE: $
1244	CODE:	1314	CODE:
1245	api_ready (self);	1315	RETVAL = boolSV (api_ready (self));
		1316	OUTPUT:
		1317	RETVAL
		1318
		1319	SV *
		1320	is_ready (SV *self)
		1321	PROTOTYPE: $
		1322	CODE:
		1323	RETVAL = boolSV (api_is_ready (self));
		1324	OUTPUT:
		1325	RETVAL
1246		1326
1247	int	1327	int
1248	nready (...)	1328	nready (...)
1249	PROTOTYPE:	1329	PROTOTYPE:
1250	CODE:	1330	CODE:
…		…
1256		1336
1257	SV *	1337	SV *
1258	_get_state ()	1338	_get_state ()
1259	CODE:	1339	CODE:
1260	{	1340	{
1261	struct {	1341	struct io_state *data;
1262	int errorno;
1263	int laststype;
1264	int laststatval;
1265	Stat_t statcache;
1266	} data;
1267		1342
		1343	RETVAL = newSV (sizeof (struct io_state));
		1344	data = (struct io_state *)SvPVX (RETVAL);
		1345	SvCUR_set (RETVAL, sizeof (struct io_state));
		1346	SvPOK_only (RETVAL);
		1347
1268	data.errorno = errno;	1348	data->errorno = errno;
1269	data.laststype = PL_laststype;	1349	data->laststype = PL_laststype;
1270	data.laststatval = PL_laststatval;	1350	data->laststatval = PL_laststatval;
1271	data.statcache = PL_statcache;	1351	data->statcache = PL_statcache;
1272
1273	RETVAL = newSVpvn ((char *)&data, sizeof data);
1274	}	1352	}
1275	OUTPUT:	1353	OUTPUT:
1276	RETVAL	1354	RETVAL
1277		1355
1278	void	1356	void
1279	_set_state (char *data_)	1357	_set_state (char *data_)
1280	PROTOTYPE: $	1358	PROTOTYPE: $
1281	CODE:	1359	CODE:
1282	{	1360	{
1283	struct {	1361	struct io_state *data = (void *)data_;
1284	int errorno;
1285	int laststype;
1286	int laststatval;
1287	Stat_t statcache;
1288	} *data = (void *)data_;
1289		1362
1290	errno = data->errorno;	1363	errno = data->errorno;
1291	PL_laststype = data->laststype;	1364	PL_laststype = data->laststype;
1292	PL_laststatval = data->laststatval;	1365	PL_laststatval = data->laststatval;
1293	PL_statcache = data->statcache;	1366	PL_statcache = data->statcache;
1294	}	1367	}
		1368

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