ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.107 by root, Mon Nov 27 02:15:51 2006 UTC vs.
Revision 1.142 by root, Tue Feb 13 19:21:29 2007 UTC

…		…
4	#include "perl.h"	4	#include "perl.h"
5	#include "XSUB.h"	5	#include "XSUB.h"
6		6
7	#include "patchlevel.h"	7	#include "patchlevel.h"
8		8
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \
15	|| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \
17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19	#if !PERL_VERSION_ATLEAST (5,6,0)
20	# ifndef PL_ppaddr
21	# define PL_ppaddr ppaddr
22	# endif
23	# ifndef call_sv
24	# define call_sv perl_call_sv
25	# endif
26	# ifndef get_sv
27	# define get_sv perl_get_sv
28	# endif
29	# ifndef get_cv
30	# define get_cv perl_get_cv
31	# endif
32	# ifndef IS_PADGV
33	# define IS_PADGV(v) 0
34	# endif
35	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0
37	# endif
38	#endif
39
40	#include <stdio.h>	9	#include <stdio.h>
41	#include <errno.h>	10	#include <errno.h>
42		11	#include <assert.h>
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44	# undef STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50		12
51	#ifdef HAVE_MMAP	13	#ifdef HAVE_MMAP
52	# include <unistd.h>	14	# include <unistd.h>
53	# include <sys/mman.h>	15	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	16	# ifndef MAP_ANONYMOUS
…		…
69	#else	31	#else
70	# define PAGESIZE 0	32	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	33	# define BOOT_PAGESIZE (void)0
72	#endif	34	#endif
73		35
		36	#if USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		39	#else
		40	# define REGISTER_STACK(cctx,start,end)
		41	#endif
		42
		43	/* the maximum number of idle cctx that will be pooled */
		44	#define MAX_IDLE_CCTX 8
		45
		46	#define PERL_VERSION_ATLEAST(a,b,c) \
		47	(PERL_REVISION > (a) \
		48	|| (PERL_REVISION == (a) \
		49	&& (PERL_VERSION > (b) \
		50	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		51
		52	#if !PERL_VERSION_ATLEAST (5,6,0)
		53	# ifndef PL_ppaddr
		54	# define PL_ppaddr ppaddr
		55	# endif
		56	# ifndef call_sv
		57	# define call_sv perl_call_sv
		58	# endif
		59	# ifndef get_sv
		60	# define get_sv perl_get_sv
		61	# endif
		62	# ifndef get_cv
		63	# define get_cv perl_get_cv
		64	# endif
		65	# ifndef IS_PADGV
		66	# define IS_PADGV(v) 0
		67	# endif
		68	# ifndef IS_PADCONST
		69	# define IS_PADCONST(v) 0
		70	# endif
		71	#endif
		72
		73	/* 5.8.7 */
		74	#ifndef SvRV_set
		75	# define SvRV_set(s,v) SvRV(s) = (v)
		76	#endif
		77
		78	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		79	# undef STACKGUARD
		80	#endif
		81
		82	#ifndef STACKGUARD
		83	# define STACKGUARD 0
		84	#endif
		85
		86	/* prefer perl internal functions over our own? */
		87	#ifndef PREFER_PERL_FUNCTIONS
		88	# define PREFER_PERL_FUNCTIONS 0
		89	#endif
		90
74	/* The next macro should declare a variable stacklevel that contains and approximation	91	/* The next macro should declare a variable stacklevel that contains and approximation
75	* to the current C stack pointer. Its property is that it changes with each call	92	* to the current C stack pointer. Its property is that it changes with each call
76	* and should be unique. */	93	* and should be unique. */
77	#define dSTACKLEVEL int stacklevel	94	#define dSTACKLEVEL int stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	95	#define STACKLEVEL ((void *)&stacklevel)
79		96
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	97	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		98
82	#if __GNUC__ >= 3	99	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	100	# define attribute(x) __attribute__(x)
		101	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
84	#else	102	#else
85	# define attribute(x)	103	# define attribute(x)
		104	# define BARRIER
86	#endif	105	#endif
87		106
88	#define NOINLINE attribute ((noinline))	107	#define NOINLINE attribute ((noinline))
89		108
90	#include "CoroAPI.h"	109	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		110
94	#ifdef USE_ITHREADS	111	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	112	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	113	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	114	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	115	#else
99	# define LOCK (void)0	116	# define LOCK (void)0
100	# define UNLOCK (void)0	117	# define UNLOCK (void)0
101	#endif	118	#endif
102		119
		120	/* helper storage struct for Coro::AIO */
		121	struct io_state
		122	{
		123	int errorno;
		124	I32 laststype;
		125	int laststatval;
		126	Stat_t statcache;
		127	};
		128
103	static struct CoroAPI coroapi;	129	static struct CoroAPI coroapi;
104	static AV *main_mainstack; /* used to differentiate between $main and others */	130	static AV *main_mainstack; /* used to differentiate between $main and others */
105	static HV *coro_state_stash, *coro_stash;	131	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	132	static SV *coro_mortal; /* will be freed after next transfer */
107		133
…		…
112	typedef struct coro_cctx {	138	typedef struct coro_cctx {
113	struct coro_cctx *next;	139	struct coro_cctx *next;
114		140
115	/* the stack */	141	/* the stack */
116	void *sptr;	142	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	143	ssize_t ssize; /* positive == mmap, otherwise malloc */
118		144
119	/* cpu state */	145	/* cpu state */
120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	146	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		147	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	148	JMPENV *top_env;
122	coro_context cctx;	149	coro_context cctx;
123		150
		151	int inuse;
		152
124	#if USE_VALGRIND	153	#if USE_VALGRIND
125	int valgrind_id;	154	int valgrind_id;
126	#endif	155	#endif
127	} coro_cctx;	156	} coro_cctx;
		157
		158	enum {
		159	CF_RUNNING = 0x0001, /* coroutine is running */
		160	CF_READY = 0x0002, /* coroutine is ready */
		161	CF_NEW = 0x0004, /* has never been switched to */
		162	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		163	};
128		164
129	/* this is a structure representing a perl-level coroutine */	165	/* this is a structure representing a perl-level coroutine */
130	struct coro {	166	struct coro {
131	/* the c coroutine allocated to this perl coroutine, if any */	167	/* the c coroutine allocated to this perl coroutine, if any */
132	coro_cctx *cctx;	168	coro_cctx *cctx;
133		169
134	/* data associated with this coroutine (initial args) */	170	/* data associated with this coroutine (initial args) */
135	AV *args;	171	AV *args;
136	int refcnt;	172	int refcnt;
		173	int save; /* CORO_SAVE flags */
		174	int flags; /* CF_ flags */
137		175
138	/* optionally saved, might be zero */	176	/* optionally saved, might be zero */
139	AV *defav;	177	AV *defav; /* @_ */
140	SV *defsv;	178	SV *defsv; /* $_ */
141	SV *errsv;	179	SV *errsv; /* $@ */
		180	SV *irssv; /* $/ */
		181	SV *irssv_sv; /* real $/ cache */
142		182
143	/* saved global state not related to stacks */	183	#define VAR(name,type) type name;
144	U8 dowarn;	184	# include "state.h"
145	I32 in_eval;	185	#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		186
177	/* coro process data */	187	/* coro process data */
178	int prio;	188	int prio;
179	};	189	};
180		190
181	typedef struct coro *Coro__State;	191	typedef struct coro *Coro__State;
182	typedef struct coro *Coro__State_or_hashref;	192	typedef struct coro *Coro__State_or_hashref;
		193
		194	/** Coro ********************************************************************/
		195
		196	#define PRIO_MAX 3
		197	#define PRIO_HIGH 1
		198	#define PRIO_NORMAL 0
		199	#define PRIO_LOW -1
		200	#define PRIO_IDLE -3
		201	#define PRIO_MIN -4
		202
		203	/* for Coro.pm */
		204	static SV *coro_current;
		205	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		206	static int coro_nready;
		207
		208	/** lowlevel stuff **********************************************************/
183		209
184	static AV *	210	static AV *
185	coro_clone_padlist (CV *cv)	211	coro_clone_padlist (CV *cv)
186	{	212	{
187	AV *padlist = CvPADLIST (cv);	213	AV *padlist = CvPADLIST (cv);
…		…
244		270
245	#define PERL_MAGIC_coro PERL_MAGIC_ext	271	#define PERL_MAGIC_coro PERL_MAGIC_ext
246		272
247	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	273	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
248		274
		275	#define CORO_MAGIC(cv) \
		276	SvMAGIC (cv) \
		277	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		278	? SvMAGIC (cv) \
		279	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		280	: 0
		281
249	/* the next two functions merely cache the padlists */	282	/* the next two functions merely cache the padlists */
250	static void	283	static void
251	get_padlist (CV *cv)	284	get_padlist (CV *cv)
252	{	285	{
253	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	286	MAGIC *mg = CORO_MAGIC (cv);
		287	AV *av;
254		288
255	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	289	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
256	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	290	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
257	else	291	else
258	{	292	{
259	#if 0	293	#if PREFER_PERL_FUNCTIONS
260	/* this is probably cleaner, but also slower? */	294	/* this is probably cleaner, but also slower? */
261	CV *cp = Perl_cv_clone (cv);	295	CV *cp = Perl_cv_clone (cv);
262	CvPADLIST (cv) = CvPADLIST (cp);	296	CvPADLIST (cv) = CvPADLIST (cp);
263	CvPADLIST (cp) = 0;	297	CvPADLIST (cp) = 0;
264	SvREFCNT_dec (cp);	298	SvREFCNT_dec (cp);
…		…
269	}	303	}
270		304
271	static void	305	static void
272	put_padlist (CV *cv)	306	put_padlist (CV *cv)
273	{	307	{
274	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	308	MAGIC *mg = CORO_MAGIC (cv);
		309	AV *av;
275		310
276	if (!mg)	311	if (!mg)
277	{	312	{
278	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	313	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
279	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	314	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
280	mg->mg_virtual = &vtbl_coro;	315	mg->mg_virtual = &vtbl_coro;
281	mg->mg_obj = (SV *)newAV ();	316	mg->mg_obj = (SV *)newAV ();
282	}	317	}
283		318
284	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	319	av = (AV *)mg->mg_obj;
		320
		321	if (AvFILLp (av) >= AvMAX (av))
		322	av_extend (av, AvMAX (av) + 1);
		323
		324	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
285	}	325	}
		326
		327	/** load & save, init *******************************************************/
286		328
287	#define SB do {	329	#define SB do {
288	#define SE } while (0)	330	#define SE } while (0)
289		331
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	332	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
294		333
295	static void	334	static void
296	load_state(Coro__State c)	335	load_perl (Coro__State c)
297	{	336	{
298	PL_dowarn = c->dowarn;	337	#define VAR(name,type) PL_ ## name = c->name;
299	PL_in_eval = c->in_eval;	338	# include "state.h"
300		339	#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		340
332	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	341	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
333	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	342	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
334	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	343	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		344	if (c->irssv)
		345	{
		346	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		347	SvREFCNT_dec (c->irssv);
		348	else
		349	{
		350	REPLACE_SV (PL_rs, c->irssv);
		351	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		352	sv_setsv (c->irssv_sv, PL_rs);
		353	}
		354	}
335		355
336	{	356	{
337	dSP;	357	dSP;
338	CV *cv;	358	CV *cv;
339		359
340	/* now do the ugly restore mess */	360	/* now do the ugly restore mess */
341	while ((cv = (CV *)POPs))	361	while ((cv = (CV *)POPs))
342	{	362	{
343	AV *padlist = (AV *)POPs;
344
345	if (padlist)
346	{
347	put_padlist (cv); /* mark this padlist as available */	363	put_padlist (cv); /* mark this padlist as available */
348	CvPADLIST(cv) = padlist;	364	CvDEPTH (cv) = PTR2IV (POPs);
349	}	365	CvPADLIST (cv) = (AV *)POPs;
350
351	++CvDEPTH(cv);
352	}	366	}
353		367
354	PUTBACK;	368	PUTBACK;
355	}	369	}
		370	assert (!PL_comppad || AvARRAY (PL_comppad));//D
356	}	371	}
357		372
358	static void	373	static void
359	save_state(Coro__State c, int flags)	374	save_perl (Coro__State c)
360	{	375	{
		376	assert (!PL_comppad || AvARRAY (PL_comppad));//D
361	{	377	{
362	dSP;	378	dSP;
363	I32 cxix = cxstack_ix;	379	I32 cxix = cxstack_ix;
364	PERL_CONTEXT *ccstk = cxstack;	380	PERL_CONTEXT *ccstk = cxstack;
365	PERL_SI *top_si = PL_curstackinfo;	381	PERL_SI *top_si = PL_curstackinfo;
…		…
367	/*	383	/*
368	* the worst thing you can imagine happens first - we have to save	384	* the worst thing you can imagine happens first - we have to save
369	* (and reinitialize) all cv's in the whole callchain :(	385	* (and reinitialize) all cv's in the whole callchain :(
370	*/	386	*/
371		387
		388	EXTEND (SP, 3 + 1);
372	PUSHs (Nullsv);	389	PUSHs (Nullsv);
373	/* this loop was inspired by pp_caller */	390	/* this loop was inspired by pp_caller */
374	for (;;)	391	for (;;)
375	{	392	{
376	while (cxix >= 0)	393	while (cxix >= 0)
377	{	394	{
378	PERL_CONTEXT *cx = &ccstk[cxix--];	395	PERL_CONTEXT *cx = &ccstk[cxix--];
379		396
380	if (CxTYPE(cx) == CXt_SUB)	397	if (CxTYPE (cx) == CXt_SUB)
381	{	398	{
382	CV *cv = cx->blk_sub.cv;	399	CV *cv = cx->blk_sub.cv;
		400
383	if (CvDEPTH(cv))	401	if (CvDEPTH (cv))
384	{	402	{
385	EXTEND (SP, CvDEPTH(cv)*2);	403	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));	404	PUSHs ((SV *)CvPADLIST (cv));
		405	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
395	PUSHs ((SV *)cv);	406	PUSHs ((SV *)cv);
396		407
		408	CvDEPTH (cv) = 0;
397	get_padlist (cv);	409	get_padlist (cv);
398	}	410	}
399	}	411	}
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	}	412	}
409		413
410	if (top_si->si_type == PERLSI_MAIN)	414	if (top_si->si_type == PERLSI_MAIN)
411	break;	415	break;
412		416
…		…
416	}	420	}
417		421
418	PUTBACK;	422	PUTBACK;
419	}	423	}
420		424
421	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	425	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;	426	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
423	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	427	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		428	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
424		429
425	c->dowarn = PL_dowarn;	430	#define VAR(name,type)c->name = PL_ ## name;
426	c->in_eval = PL_in_eval;	431	# include "state.h"
427		432	#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	}	433	}
459		434
460	/*	435	/*
461	* allocate various perl stacks. This is an exact copy	436	* allocate various perl stacks. This is an exact copy
462	* of perl.c:init_stacks, except that it uses less memory	437	* of perl.c:init_stacks, except that it uses less memory
463	* on the (sometimes correct) assumption that coroutines do	438	* on the (sometimes correct) assumption that coroutines do
464	* not usually need a lot of stackspace.	439	* not usually need a lot of stackspace.
465	*/	440	*/
		441	#if PREFER_PERL_FUNCTIONS
		442	# define coro_init_stacks init_stacks
		443	#else
466	static void	444	static void
467	coro_init_stacks ()	445	coro_init_stacks ()
468	{	446	{
469	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	447	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
470	PL_curstackinfo->si_type = PERLSI_MAIN;	448	PL_curstackinfo->si_type = PERLSI_MAIN;
471	PL_curstack = PL_curstackinfo->si_stack;	449	PL_curstack = PL_curstackinfo->si_stack;
472	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
473		451
474	PL_stack_base = AvARRAY(PL_curstack);	452	PL_stack_base = AvARRAY(PL_curstack);
475	PL_stack_sp = PL_stack_base;	453	PL_stack_sp = PL_stack_base;
476	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
477		455
478	New(50,PL_tmps_stack,96,SV*);	456	New(50,PL_tmps_stack,128,SV*);
479	PL_tmps_floor = -1;	457	PL_tmps_floor = -1;
480	PL_tmps_ix = -1;	458	PL_tmps_ix = -1;
481	PL_tmps_max = 96;	459	PL_tmps_max = 128;
482		460
483	New(54,PL_markstack,16,I32);	461	New(54,PL_markstack,32,I32);
484	PL_markstack_ptr = PL_markstack;	462	PL_markstack_ptr = PL_markstack;
485	PL_markstack_max = PL_markstack + 16;	463	PL_markstack_max = PL_markstack + 32;
486		464
487	#ifdef SET_MARK_OFFSET	465	#ifdef SET_MARK_OFFSET
488	SET_MARK_OFFSET;	466	SET_MARK_OFFSET;
489	#endif	467	#endif
490		468
491	New(54,PL_scopestack,16,I32);	469	New(54,PL_scopestack,32,I32);
492	PL_scopestack_ix = 0;	470	PL_scopestack_ix = 0;
493	PL_scopestack_max = 16;	471	PL_scopestack_max = 32;
494		472
495	New(54,PL_savestack,96,ANY);	473	New(54,PL_savestack,64,ANY);
496	PL_savestack_ix = 0;	474	PL_savestack_ix = 0;
497	PL_savestack_max = 96;	475	PL_savestack_max = 64;
498		476
499	#if !PERL_VERSION_ATLEAST (5,9,0)	477	#if !PERL_VERSION_ATLEAST (5,9,0)
500	New(54,PL_retstack,8,OP*);	478	New(54,PL_retstack,16,OP*);
501	PL_retstack_ix = 0;	479	PL_retstack_ix = 0;
502	PL_retstack_max = 8;	480	PL_retstack_max = 16;
503	#endif	481	#endif
504	}	482	}
		483	#endif
505		484
506	/*	485	/*
507	* destroy the stacks, the callchain etc...	486	* destroy the stacks, the callchain etc...
508	*/	487	*/
509	static void	488	static void
510	coro_destroy_stacks ()	489	coro_destroy_stacks ()
511	{	490	{
512	if (!IN_DESTRUCT)	491	if (!IN_DESTRUCT)
513	{	492	{
514	/* is this ugly, I ask? */	493	/* restore all saved variables and stuff */
515	LEAVE_SCOPE (0);	494	LEAVE_SCOPE (0);
		495	assert (PL_tmps_floor == -1);
516		496
517	/* sure it is, but more important: is it correct?? :/ */	497	/* free all temporaries */
518	FREETMPS;	498	FREETMPS;
		499	assert (PL_tmps_ix == -1);
519		500
		501	/* unwind all extra stacks */
520	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	502	POPSTACK_TO (PL_mainstack);
		503
		504	/* unwind main stack */
		505	dounwind (-1);
521	}	506	}
522		507
523	while (PL_curstackinfo->si_next)	508	while (PL_curstackinfo->si_next)
524	PL_curstackinfo = PL_curstackinfo->si_next;	509	PL_curstackinfo = PL_curstackinfo->si_next;
525		510
526	while (PL_curstackinfo)	511	while (PL_curstackinfo)
527	{	512	{
528	PERL_SI *p = PL_curstackinfo->si_prev;	513	PERL_SI *p = PL_curstackinfo->si_prev;
529		514
530	{ /*D*//*remove*/
531	dSP;
532	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
533	PUTBACK; /* possibly superfluous */
534	}
535
536	if (!IN_DESTRUCT)	515	if (!IN_DESTRUCT)
537	{
538	dounwind (-1);/*D*//*remove*/
539	SvREFCNT_dec (PL_curstackinfo->si_stack);	516	SvREFCNT_dec (PL_curstackinfo->si_stack);
540	}
541		517
542	Safefree (PL_curstackinfo->si_cxstack);	518	Safefree (PL_curstackinfo->si_cxstack);
543	Safefree (PL_curstackinfo);	519	Safefree (PL_curstackinfo);
544	PL_curstackinfo = p;	520	PL_curstackinfo = p;
545	}	521	}
…		…
551	#if !PERL_VERSION_ATLEAST (5,9,0)	527	#if !PERL_VERSION_ATLEAST (5,9,0)
552	Safefree (PL_retstack);	528	Safefree (PL_retstack);
553	#endif	529	#endif
554	}	530	}
555		531
		532	/** coroutine stack handling ************************************************/
		533
556	static void	534	static void
557	setup_coro (struct coro *coro)	535	setup_coro (struct coro *coro)
558	{	536	{
559	/*	537	/*
560	* emulate part of the perl startup here.	538	* emulate part of the perl startup here.
561	*/	539	*/
562		540
563	coro_init_stacks ();	541	coro_init_stacks ();
564		542
		543	PL_curcop = &PL_compiling;
		544	PL_in_eval = EVAL_NULL;
565	PL_curcop = 0;	545	PL_comppad = 0;
566	PL_in_eval = 0;
567	PL_curpm = 0;	546	PL_curpm = 0;
		547	PL_localizing = 0;
		548	PL_dirty = 0;
		549	PL_restartop = 0;
568		550
569	{	551	{
570	dSP;	552	dSP;
571	LOGOP myop;	553	LOGOP myop;
572		554
573	/* I have no idea why this is needed, but it is */
574	PUSHMARK (SP);
575
576	SvREFCNT_dec (GvAV (PL_defgv));	555	SvREFCNT_dec (GvAV (PL_defgv));
577	GvAV (PL_defgv) = coro->args; coro->args = 0;	556	GvAV (PL_defgv) = coro->args; coro->args = 0;
578		557
579	Zero (&myop, 1, LOGOP);	558	Zero (&myop, 1, LOGOP);
580	myop.op_next = Nullop;	559	myop.op_next = Nullop;
581	myop.op_flags = OPf_WANT_VOID;	560	myop.op_flags = OPf_WANT_VOID;
582		561
583	PL_op = (OP *)&myop;
584
585	PUSHMARK (SP);	562	PUSHMARK (SP);
586	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	563	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
587	PUTBACK;	564	PUTBACK;
		565	PL_op = (OP *)&myop;
588	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
589	SPAGAIN;	567	SPAGAIN;
590
591	ENTER; /* necessary e.g. for dounwind */
592	}	568	}
		569
		570	ENTER; /* necessary e.g. for dounwind */
593	}	571	}
594		572
595	static void	573	static void
596	free_coro_mortal ()	574	free_coro_mortal ()
597	{	575	{
…		…
600	SvREFCNT_dec (coro_mortal);	578	SvREFCNT_dec (coro_mortal);
601	coro_mortal = 0;	579	coro_mortal = 0;
602	}	580	}
603	}	581	}
604		582
		583	/* inject a fake call to Coro::State::_cctx_init into the execution */
605	static void NOINLINE	584	static void NOINLINE
606	prepare_cctx (coro_cctx *cctx)	585	prepare_cctx (coro_cctx *cctx)
607	{	586	{
608	dSP;	587	dSP;
609	LOGOP myop;	588	LOGOP myop;
610		589
611	Zero (&myop, 1, LOGOP);	590	Zero (&myop, 1, LOGOP);
612	myop.op_next = PL_op;	591	myop.op_next = PL_op;
613	myop.op_flags = OPf_WANT_VOID;	592	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
614
615	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
616		593
617	PUSHMARK (SP);	594	PUSHMARK (SP);
		595	EXTEND (SP, 2);
		596	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
618	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	597	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
619	PUTBACK;	598	PUTBACK;
		599	PL_op = (OP *)&myop;
620	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	600	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
621	SPAGAIN;	601	SPAGAIN;
622	}	602	}
623		603
624	static void	604	static void
625	coro_run (void *arg)	605	coro_run (void *arg)
626	{	606	{
627	/* coro_run is the alternative epilogue of transfer() */	607	/* coro_run is the alternative tail of transfer(), so unlock here. */
628	UNLOCK;	608	UNLOCK;
629		609
630	/*	610	/*
631	* this is a _very_ stripped down perl interpreter ;)	611	* this is a _very_ stripped down perl interpreter ;)
632	*/	612	*/
…		…
634		614
635	/* inject call to cctx_init */	615	/* inject call to cctx_init */
636	prepare_cctx ((coro_cctx *)arg);	616	prepare_cctx ((coro_cctx *)arg);
637		617
638	/* somebody will hit me for both perl_run and PL_restartop */	618	/* somebody will hit me for both perl_run and PL_restartop */
		619	PL_restartop = PL_op;
639	perl_run (PL_curinterp);	620	perl_run (PL_curinterp);
640		621
641	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	622	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
642	abort ();	623	abort ();
643	}	624	}
…		…
647	{	628	{
648	coro_cctx *cctx;	629	coro_cctx *cctx;
649		630
650	++cctx_count;	631	++cctx_count;
651		632
652	New (0, cctx, 1, coro_cctx);	633	Newz (0, cctx, 1, coro_cctx);
653		634
654	#if HAVE_MMAP	635	#if HAVE_MMAP
655		636
656	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	637	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
657	/* mmap suppsedly does allocate-on-write for us */	638	/* 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);	639	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
659		640
660	if (cctx->sptr == (void *)-1)	641	if (cctx->sptr != (void *)-1)
661	{
662	perror ("FATAL: unable to mmap stack for coroutine");
663	_exit (EXIT_FAILURE);
664	}	642	{
665
666	# if STACKGUARD	643	# if STACKGUARD
667	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	644	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
668	# endif	645	# endif
669		646	REGISTER_STACK (
670	#else	647	cctx,
671
672	cctx->ssize = STACKSIZE * (long)sizeof (long);
673	New (0, cctx->sptr, STACKSIZE, long);
674
675	if (!cctx->sptr)
676	{
677	perror ("FATAL: unable to malloc stack for coroutine");
678	_exit (EXIT_FAILURE);
679	}
680
681	#endif
682
683	#if USE_VALGRIND
684	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
685	STACKGUARD * PAGESIZE + (char *)cctx->sptr,	648	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
686	cctx->ssize + (char *)cctx->sptr	649	cctx->ssize + (char *)cctx->sptr
687	);	650	);
688	#endif
689		651
690	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	652	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		653	}
		654	else
		655	#endif
		656	{
		657	cctx->ssize = -STACKSIZE * (long)sizeof (long);
		658	New (0, cctx->sptr, STACKSIZE, long);
		659
		660	if (!cctx->sptr)
		661	{
		662	perror ("FATAL: unable to allocate stack for coroutine");
		663	_exit (EXIT_FAILURE);
		664	}
		665
		666	REGISTER_STACK (
		667	cctx,
		668	(char *)cctx->sptr,
		669	(char *)cctx->sptr - cctx->ssize
		670	);
		671
		672	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, -cctx->ssize);
		673	}
691		674
692	return cctx;	675	return cctx;
693	}	676	}
694		677
695	static void	678	static void
696	cctx_free (coro_cctx *cctx)	679	cctx_destroy (coro_cctx *cctx)
697	{	680	{
698	if (!cctx)	681	if (!cctx)
699	return;	682	return;
700		683
701	--cctx_count;	684	--cctx_count;
…		…
703	#if USE_VALGRIND	686	#if USE_VALGRIND
704	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	687	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
705	#endif	688	#endif
706		689
707	#if HAVE_MMAP	690	#if HAVE_MMAP
		691	if (cctx->ssize > 0)
708	munmap (cctx->sptr, cctx->ssize);	692	munmap (cctx->sptr, cctx->ssize);
709	#else	693	else
		694	#endif
710	Safefree (cctx->sptr);	695	Safefree (cctx->sptr);
711	#endif
712		696
713	Safefree (cctx);	697	Safefree (cctx);
714	}	698	}
715		699
716	static coro_cctx *	700	static coro_cctx *
…		…
718	{	702	{
719	coro_cctx *cctx;	703	coro_cctx *cctx;
720		704
721	if (cctx_first)	705	if (cctx_first)
722	{	706	{
723	--cctx_idle;
724	cctx = cctx_first;	707	cctx = cctx_first;
725	cctx_first = cctx->next;	708	cctx_first = cctx->next;
		709	--cctx_idle;
726	}	710	}
727	else	711	else
728	{	712	{
729	cctx = cctx_new ();	713	cctx = cctx_new ();
730	PL_op = PL_op->op_next;	714	PL_op = PL_op->op_next;
…		…
734	}	718	}
735		719
736	static void	720	static void
737	cctx_put (coro_cctx *cctx)	721	cctx_put (coro_cctx *cctx)
738	{	722	{
		723	/* free another cctx if overlimit */
		724	if (cctx_idle >= MAX_IDLE_CCTX)
		725	{
		726	coro_cctx *first = cctx_first;
		727	cctx_first = first->next;
		728	--cctx_idle;
		729
		730	assert (!first->inuse);
		731	cctx_destroy (first);
		732	}
		733
739	++cctx_idle;	734	++cctx_idle;
740	cctx->next = cctx_first;	735	cctx->next = cctx_first;
741	cctx_first = cctx;	736	cctx_first = cctx;
742	}	737	}
743		738
		739	/** coroutine switching *****************************************************/
		740
744	/* never call directly, always through the coro_state_transfer global variable */	741	/* never call directly, always through the coro_state_transfer global variable */
745	static void NOINLINE	742	static void NOINLINE
746	transfer (struct coro *prev, struct coro *next, int flags)	743	transfer (struct coro *prev, struct coro *next)
747	{	744	{
748	dSTACKLEVEL;	745	dSTACKLEVEL;
749		746
750	/* sometimes transfer is only called to set idle_sp */	747	/* sometimes transfer is only called to set idle_sp */
751	if (flags == TRANSFER_SET_STACKLEVEL)	748	if (!next)
		749	{
752	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	750	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		751	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		752	}
753	else if (prev != next)	753	else if (prev != next)
754	{	754	{
755	coro_cctx *prev__cctx;	755	coro_cctx *prev__cctx;
756		756
		757	if (prev->flags & CF_NEW)
		758	{
		759	/* create a new empty context */
		760	Newz (0, prev->cctx, 1, coro_cctx);
		761	prev->cctx->inuse = 1;
		762	prev->flags &= ~CF_NEW;
		763	prev->flags |= CF_RUNNING;
		764	}
		765
		766	/*TODO: must not croak here */
		767	if (!prev->flags & CF_RUNNING)
		768	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		769
		770	if (next->flags & CF_RUNNING)
		771	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		772
		773	if (next->flags & CF_DESTROYED)
		774	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		775
		776	prev->flags &= ~CF_RUNNING;
		777	next->flags |= CF_RUNNING;
		778
757	LOCK;	779	LOCK;
758		780
759	if (next->mainstack)	781	if (next->flags & CF_NEW)
760	{	782	{
761	/* coroutine already started */	783	/* need to start coroutine */
762	SAVE (prev, flags);	784	next->flags &= ~CF_NEW;
763	LOAD (next);	785	/* first get rid of the old state */
		786	save_perl (prev);
		787	/* setup coroutine call */
		788	setup_coro (next);
		789	/* need a new stack */
		790	assert (!next->cctx);
764	}	791	}
765	else	792	else
766	{	793	{
767	/* need to start coroutine */	794	/* coroutine already started */
768	/* first get rid of the old state */	795	save_perl (prev);
769	SAVE (prev, -1);	796	load_perl (next);
770	/* setup coroutine call */
771	setup_coro (next);
772	/* need a stack */
773	next->cctx = 0;
774	}	797	}
775
776	if (!prev->cctx)
777	/* create a new empty context */
778	Newz (0, prev->cctx, 1, coro_cctx);
779		798
780	prev__cctx = prev->cctx;	799	prev__cctx = prev->cctx;
781		800
782	/* possibly "free" the cctx */	801	/* possibly "free" the cctx */
783	if (prev__cctx->idle_sp == STACKLEVEL)	802	if (prev__cctx->idle_sp == STACKLEVEL)
784	{	803	{
		804	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		805	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		806
		807	prev->cctx = 0;
		808
785	cctx_put (prev__cctx);	809	cctx_put (prev__cctx);
786	prev->cctx = 0;	810	prev__cctx->inuse = 0;
787	}	811	}
788		812
789	if (!next->cctx)	813	if (!next->cctx)
		814	{
790	next->cctx = cctx_get ();	815	next->cctx = cctx_get ();
		816	assert (!next->cctx->inuse);
		817	next->cctx->inuse = 1;
		818	}
791		819
792	if (prev__cctx != next->cctx)	820	if (prev__cctx != next->cctx)
793	{	821	{
794	prev__cctx->top_env = PL_top_env;	822	prev__cctx->top_env = PL_top_env;
795	PL_top_env = next->cctx->top_env;	823	PL_top_env = next->cctx->top_env;
796	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	824	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
797	}	825	}
798		826
799	free_coro_mortal ();	827	free_coro_mortal ();
800
801	UNLOCK;	828	UNLOCK;
802	}	829	}
803	}	830	}
804		831
805	struct transfer_args	832	struct transfer_args
806	{	833	{
807	struct coro *prev, *next;	834	struct coro *prev, *next;
808	int flags;
809	};	835	};
810		836
811	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	837	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
812		838
		839	/** high level stuff ********************************************************/
		840
813	static void	841	static int
814	coro_state_destroy (struct coro *coro)	842	coro_state_destroy (struct coro *coro)
815	{	843	{
816	if (coro->refcnt--)	844	if (coro->flags & CF_DESTROYED)
817	return;	845	return 0;
		846
		847	coro->flags |= CF_DESTROYED;
		848
		849	if (coro->flags & CF_READY)
		850	{
		851	/* reduce nready, as destroying a ready coro effectively unreadies it */
		852	/* alternative: look through all ready queues and remove the coro */
		853	LOCK;
		854	--coro_nready;
		855	UNLOCK;
		856	}
		857	else
		858	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
818		859
819	if (coro->mainstack && coro->mainstack != main_mainstack)	860	if (coro->mainstack && coro->mainstack != main_mainstack)
820	{	861	{
821	struct coro temp;	862	struct coro temp;
822		863
823	SAVE ((&temp), TRANSFER_SAVE_ALL);	864	assert (!(coro->flags & CF_RUNNING));
824	LOAD (coro);	865
		866	Zero (&temp, 1, struct coro);
		867	temp.save = CORO_SAVE_ALL;
		868
		869	if (coro->flags & CF_RUNNING)
		870	croak ("FATAL: tried to destroy currently running coroutine");
		871
		872	save_perl (&temp);
		873	load_perl (coro);
825		874
826	coro_destroy_stacks ();	875	coro_destroy_stacks ();
827		876
828	LOAD ((&temp)); /* this will get rid of defsv etc.. */	877	load_perl (&temp); /* this will get rid of defsv etc.. */
829		878
830	coro->mainstack = 0;	879	coro->mainstack = 0;
831	}	880	}
832		881
833	cctx_free (coro->cctx);	882	cctx_destroy (coro->cctx);
834	SvREFCNT_dec (coro->args);	883	SvREFCNT_dec (coro->args);
835	Safefree (coro);	884
		885	return 1;
836	}	886	}
837		887
838	static int	888	static int
839	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	889	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
840	{	890	{
841	struct coro *coro = (struct coro *)mg->mg_ptr;	891	struct coro *coro = (struct coro *)mg->mg_ptr;
842	mg->mg_ptr = 0;	892	mg->mg_ptr = 0;
843		893
		894	if (--coro->refcnt < 0)
		895	{
844	coro_state_destroy (coro);	896	coro_state_destroy (coro);
		897	Safefree (coro);
		898	}
845		899
846	return 0;	900	return 0;
847	}	901	}
848		902
849	static int	903	static int
…		…
856	return 0;	910	return 0;
857	}	911	}
858		912
859	static MGVTBL coro_state_vtbl = {	913	static MGVTBL coro_state_vtbl = {
860	0, 0, 0, 0,	914	0, 0, 0, 0,
861	coro_state_clear,	915	coro_state_free,
862	0,	916	0,
863	#ifdef MGf_DUP	917	#ifdef MGf_DUP
864	coro_state_dup,	918	coro_state_dup,
865	#else	919	#else
866	# define MGf_DUP 0	920	# define MGf_DUP 0
…		…
888	assert (mg->mg_type == PERL_MAGIC_ext);	942	assert (mg->mg_type == PERL_MAGIC_ext);
889	return (struct coro *)mg->mg_ptr;	943	return (struct coro *)mg->mg_ptr;
890	}	944	}
891		945
892	static void	946	static void
893	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	947	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
894	{	948	{
895	ta->prev = SvSTATE (prev);	949	ta->prev = SvSTATE (prev_sv);
896	ta->next = SvSTATE (next);	950	ta->next = SvSTATE (next_sv);
897	ta->flags = flags;
898	}	951	}
899		952
900	static void	953	static void
901	api_transfer (SV *prev, SV *next, int flags)	954	api_transfer (SV *prev_sv, SV *next_sv)
902	{	955	{
903	dTHX;
904	struct transfer_args ta;	956	struct transfer_args ta;
905		957
906	prepare_transfer (&ta, prev, next, flags);	958	prepare_transfer (&ta, prev_sv, next_sv);
907	TRANSFER (ta);	959	TRANSFER (ta);
908	}	960	}
909		961
		962	static int
		963	api_save (SV *coro_sv, int new_save)
		964	{
		965	struct coro *coro = SvSTATE (coro_sv);
		966	int old_save = coro->save;
		967
		968	if (new_save >= 0)
		969	coro->save = new_save;
		970
		971	return old_save;
		972	}
		973
910	/** Coro ********************************************************************/	974	/** Coro ********************************************************************/
911		975
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	976	static void
925	coro_enq (SV *sv)	977	coro_enq (SV *coro_sv)
926	{	978	{
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);	979	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
935	coro_nready++;
936	}	980	}
937		981
938	static SV *	982	static SV *
939	coro_deq (int min_prio)	983	coro_deq (int min_prio)
940	{	984	{
…		…
944	if (min_prio < 0)	988	if (min_prio < 0)
945	min_prio = 0;	989	min_prio = 0;
946		990
947	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	991	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
948	if (AvFILLp (coro_ready [prio]) >= 0)	992	if (AvFILLp (coro_ready [prio]) >= 0)
949	{
950	coro_nready--;
951	return av_shift (coro_ready [prio]);	993	return av_shift (coro_ready [prio]);
952	}
953		994
954	return 0;	995	return 0;
955	}	996	}
956		997
957	static void	998	static int
958	api_ready (SV *coro)	999	api_ready (SV *coro_sv)
959	{	1000	{
960	dTHX;	1001	struct coro *coro;
961		1002
962	if (SvROK (coro))	1003	if (SvROK (coro_sv))
963	coro = SvRV (coro);	1004	coro_sv = SvRV (coro_sv);
		1005
		1006	coro = SvSTATE (coro_sv);
		1007
		1008	if (coro->flags & CF_READY)
		1009	return 0;
		1010
		1011	coro->flags |= CF_READY;
964		1012
965	LOCK;	1013	LOCK;
966	coro_enq (SvREFCNT_inc (coro));	1014	coro_enq (SvREFCNT_inc (coro_sv));
		1015	++coro_nready;
967	UNLOCK;	1016	UNLOCK;
		1017
		1018	return 1;
		1019	}
		1020
		1021	static int
		1022	api_is_ready (SV *coro_sv)
		1023	{
		1024	return !!(SvSTATE (coro_sv)->flags & CF_READY);
968	}	1025	}
969		1026
970	static void	1027	static void
971	prepare_schedule (struct transfer_args *ta)	1028	prepare_schedule (struct transfer_args *ta)
972	{	1029	{
973	SV *current, *prev, *next;	1030	SV *prev_sv, *next_sv;
974
975	current = GvSV (coro_current);
976		1031
977	for (;;)	1032	for (;;)
978	{	1033	{
979	LOCK;	1034	LOCK;
980	next = coro_deq (PRIO_MIN);	1035	next_sv = coro_deq (PRIO_MIN);
		1036
		1037	/* nothing to schedule: call the idle handler */
		1038	if (!next_sv)
		1039	{
		1040	dSP;
		1041	UNLOCK;
		1042
		1043	ENTER;
		1044	SAVETMPS;
		1045
		1046	PUSHMARK (SP);
		1047	PUTBACK;
		1048	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1049
		1050	FREETMPS;
		1051	LEAVE;
		1052	continue;
		1053	}
		1054
		1055	ta->next = SvSTATE (next_sv);
		1056
		1057	/* cannot transfer to destroyed coros, skip and look for next */
		1058	if (ta->next->flags & CF_DESTROYED)
		1059	{
		1060	UNLOCK;
		1061	SvREFCNT_dec (next_sv);
		1062	/* coro_nready is already taken care of by destroy */
		1063	continue;
		1064	}
		1065
		1066	--coro_nready;
981	UNLOCK;	1067	UNLOCK;
982
983	if (next)
984	break;	1068	break;
985
986	{
987	dSP;
988
989	ENTER;
990	SAVETMPS;
991
992	PUSHMARK (SP);
993	PUTBACK;
994	call_sv (GvSV (coro_idle), G_DISCARD);
995
996	FREETMPS;
997	LEAVE;
998	}	1069	}
999	}
1000
1001	prev = SvRV (current);
1002	SvRV (current) = next;
1003		1070
1004	/* free this only after the transfer */	1071	/* free this only after the transfer */
		1072	prev_sv = SvRV (coro_current);
		1073	SvRV_set (coro_current, next_sv);
		1074	ta->prev = SvSTATE (prev_sv);
		1075
		1076	assert (ta->next->flags & CF_READY);
		1077	ta->next->flags &= ~CF_READY;
		1078
1005	LOCK;	1079	LOCK;
1006	free_coro_mortal ();	1080	free_coro_mortal ();
		1081	coro_mortal = prev_sv;
1007	UNLOCK;	1082	UNLOCK;
1008	coro_mortal = prev;
1009
1010	ta->prev = SvSTATE (prev);
1011	ta->next = SvSTATE (next);
1012	ta->flags = TRANSFER_SAVE_ALL;
1013	}	1083	}
1014		1084
1015	static void	1085	static void
1016	prepare_cede (struct transfer_args *ta)	1086	prepare_cede (struct transfer_args *ta)
1017	{	1087	{
1018	LOCK;	1088	api_ready (coro_current);
1019	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1020	UNLOCK;
1021
1022	prepare_schedule (ta);	1089	prepare_schedule (ta);
1023	}	1090	}
1024		1091
		1092	static int
		1093	prepare_cede_notself (struct transfer_args *ta)
		1094	{
		1095	if (coro_nready)
		1096	{
		1097	SV *prev = SvRV (coro_current);
		1098	prepare_schedule (ta);
		1099	api_ready (prev);
		1100	return 1;
		1101	}
		1102	else
		1103	return 0;
		1104	}
		1105
1025	static void	1106	static void
1026	api_schedule (void)	1107	api_schedule (void)
1027	{	1108	{
1028	dTHX;
1029	struct transfer_args ta;	1109	struct transfer_args ta;
1030		1110
1031	prepare_schedule (&ta);	1111	prepare_schedule (&ta);
1032	TRANSFER (ta);	1112	TRANSFER (ta);
1033	}	1113	}
1034		1114
1035	static void	1115	static int
1036	api_cede (void)	1116	api_cede (void)
1037	{	1117	{
1038	dTHX;
1039	struct transfer_args ta;	1118	struct transfer_args ta;
1040		1119
1041	prepare_cede (&ta);	1120	prepare_cede (&ta);
		1121
		1122	if (ta.prev != ta.next)
		1123	{
1042	TRANSFER (ta);	1124	TRANSFER (ta);
		1125	return 1;
		1126	}
		1127	else
		1128	return 0;
		1129	}
		1130
		1131	static int
		1132	api_cede_notself (void)
		1133	{
		1134	struct transfer_args ta;
		1135
		1136	if (prepare_cede_notself (&ta))
		1137	{
		1138	TRANSFER (ta);
		1139	return 1;
		1140	}
		1141	else
		1142	return 0;
1043	}	1143	}
1044		1144
1045	MODULE = Coro::State PACKAGE = Coro::State	1145	MODULE = Coro::State PACKAGE = Coro::State
1046		1146
1047	PROTOTYPES: DISABLE	1147	PROTOTYPES: DISABLE
…		…
1053	#endif	1153	#endif
1054	BOOT_PAGESIZE;	1154	BOOT_PAGESIZE;
1055		1155
1056	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1156	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1057		1157
1058	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1158	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1059	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1159	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1060	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1160	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1161	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1162	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1061		1163
1062	main_mainstack = PL_mainstack;	1164	main_mainstack = PL_mainstack;
1063		1165
1064	coroapi.ver = CORO_API_VERSION;	1166	coroapi.ver = CORO_API_VERSION;
1065	coroapi.transfer = api_transfer;	1167	coroapi.transfer = api_transfer;
…		…
1075	HV *hv;	1177	HV *hv;
1076	int i;	1178	int i;
1077		1179
1078	Newz (0, coro, 1, struct coro);	1180	Newz (0, coro, 1, struct coro);
1079	coro->args = newAV ();	1181	coro->args = newAV ();
		1182	coro->save = CORO_SAVE_ALL;
		1183	coro->flags = CF_NEW;
1080		1184
1081	hv = newHV ();	1185	hv = newHV ();
1082	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1186	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));	1187	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1084		1188
1085	for (i = 1; i < items; i++)	1189	for (i = 1; i < items; i++)
1086	av_push (coro->args, newSVsv (ST (i)));	1190	av_push (coro->args, newSVsv (ST (i)));
1087	}	1191	}
1088	OUTPUT:	1192	OUTPUT:
		1193	RETVAL
		1194
		1195	int
		1196	save (SV *coro, int new_save = -1)
		1197	CODE:
		1198	RETVAL = api_save (coro, new_save);
		1199	OUTPUT:
1089	RETVAL	1200	RETVAL
1090		1201
1091	void	1202	void
1092	_set_stacklevel (...)	1203	_set_stacklevel (...)
1093	ALIAS:	1204	ALIAS:
1094	Coro::State::transfer = 1	1205	Coro::State::transfer = 1
1095	Coro::schedule = 2	1206	Coro::schedule = 2
1096	Coro::cede = 3	1207	Coro::cede = 3
1097	Coro::Cont::yield = 4	1208	Coro::cede_notself = 4
1098	CODE:	1209	CODE:
1099	{	1210	{
1100	struct transfer_args ta;	1211	struct transfer_args ta;
1101		1212
1102	switch (ix)	1213	switch (ix)
1103	{	1214	{
1104	case 0:	1215	case 0:
1105	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1216	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1106	ta.next = 0;	1217	ta.next = 0;
1107	ta.flags = TRANSFER_SET_STACKLEVEL;
1108	break;	1218	break;
1109		1219
1110	case 1:	1220	case 1:
1111	if (items != 3)	1221	if (items != 2)
1112	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1222	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1113		1223
1114	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1224	prepare_transfer (&ta, ST (0), ST (1));
1115	break;	1225	break;
1116		1226
1117	case 2:	1227	case 2:
1118	prepare_schedule (&ta);	1228	prepare_schedule (&ta);
1119	break;	1229	break;
…		…
1121	case 3:	1231	case 3:
1122	prepare_cede (&ta);	1232	prepare_cede (&ta);
1123	break;	1233	break;
1124		1234
1125	case 4:	1235	case 4:
1126	{	1236	if (!prepare_cede_notself (&ta))
1127	SV *yieldstack;	1237	XSRETURN_EMPTY;
1128	SV *sv;
1129	AV *defav = GvAV (PL_defgv);
1130		1238
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;	1239	break;
1150
1151	}	1240	}
1152		1241
		1242	BARRIER;
1153	TRANSFER (ta);	1243	TRANSFER (ta);
1154	}
1155		1244
1156	void	1245	if (GIMME_V != G_VOID && ta.next != ta.prev)
1157	_clone_state_from (SV *dst, SV *src)	1246	XSRETURN_YES;
		1247	}
		1248
		1249	bool
		1250	_destroy (SV *coro_sv)
1158	CODE:	1251	CODE:
1159	{	1252	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1160	struct coro *coro_src = SvSTATE (src);	1253	OUTPUT:
1161		1254	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		1255
1168	void	1256	void
1169	_exit (code)	1257	_exit (code)
1170	int code	1258	int code
1171	PROTOTYPE: $	1259	PROTOTYPE: $
…		…
1199	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1287	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1200	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1288	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1201	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1289	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1202	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1290	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1203		1291
1204	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1292	coro_current = get_sv ("Coro::current", FALSE);
1205	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1293	SvREADONLY_on (coro_current);
1206		1294
1207	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1295	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1208	coro_ready[i] = newAV ();	1296	coro_ready[i] = newAV ();
1209		1297
1210	{	1298	{
1211	SV *sv = perl_get_sv("Coro::API", 1);	1299	SV *sv = perl_get_sv("Coro::API", 1);
1212		1300
1213	coroapi.schedule = api_schedule;	1301	coroapi.schedule = api_schedule;
		1302	coroapi.save = api_save;
1214	coroapi.cede = api_cede;	1303	coroapi.cede = api_cede;
		1304	coroapi.cede_notself = api_cede_notself;
1215	coroapi.ready = api_ready;	1305	coroapi.ready = api_ready;
		1306	coroapi.is_ready = api_is_ready;
1216	coroapi.nready = &coro_nready;	1307	coroapi.nready = &coro_nready;
1217	coroapi.current = coro_current;	1308	coroapi.current = coro_current;
1218		1309
1219	GCoroAPI = &coroapi;	1310	GCoroAPI = &coroapi;
1220	sv_setiv (sv, (IV)&coroapi);	1311	sv_setiv (sv, (IV)&coroapi);
1221	SvREADONLY_on (sv);	1312	SvREADONLY_on (sv);
1222	}	1313	}
1223	}	1314	}
		1315
		1316	void
		1317	_set_current (SV *current)
		1318	PROTOTYPE: $
		1319	CODE:
		1320	SvREFCNT_dec (SvRV (coro_current));
		1321	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1224		1322
1225	int	1323	int
1226	prio (Coro::State coro, int newprio = 0)	1324	prio (Coro::State coro, int newprio = 0)
1227	ALIAS:	1325	ALIAS:
1228	nice = 1	1326	nice = 1
…		…
1231	RETVAL = coro->prio;	1329	RETVAL = coro->prio;
1232		1330
1233	if (items > 1)	1331	if (items > 1)
1234	{	1332	{
1235	if (ix)	1333	if (ix)
1236	newprio += coro->prio;	1334	newprio = coro->prio - newprio;
1237		1335
1238	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1336	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1239	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1337	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1240		1338
1241	coro->prio = newprio;	1339	coro->prio = newprio;
1242	}	1340	}
1243	}	1341	}
		1342	OUTPUT:
		1343	RETVAL
1244		1344
1245	void	1345	SV *
1246	ready (SV *self)	1346	ready (SV *self)
1247	PROTOTYPE: $	1347	PROTOTYPE: $
1248	CODE:	1348	CODE:
1249	api_ready (self);	1349	RETVAL = boolSV (api_ready (self));
		1350	OUTPUT:
		1351	RETVAL
		1352
		1353	SV *
		1354	is_ready (SV *self)
		1355	PROTOTYPE: $
		1356	CODE:
		1357	RETVAL = boolSV (api_is_ready (self));
		1358	OUTPUT:
		1359	RETVAL
1250		1360
1251	int	1361	int
1252	nready (...)	1362	nready (...)
1253	PROTOTYPE:	1363	PROTOTYPE:
1254	CODE:	1364	CODE:
…		…
1260		1370
1261	SV *	1371	SV *
1262	_get_state ()	1372	_get_state ()
1263	CODE:	1373	CODE:
1264	{	1374	{
1265	struct {	1375	struct io_state *data;
1266	int errorno;
1267	int laststype;
1268	int laststatval;
1269	Stat_t statcache;
1270	} data;
1271		1376
		1377	RETVAL = newSV (sizeof (struct io_state));
		1378	data = (struct io_state *)SvPVX (RETVAL);
		1379	SvCUR_set (RETVAL, sizeof (struct io_state));
		1380	SvPOK_only (RETVAL);
		1381
1272	data.errorno = errno;	1382	data->errorno = errno;
1273	data.laststype = PL_laststype;	1383	data->laststype = PL_laststype;
1274	data.laststatval = PL_laststatval;	1384	data->laststatval = PL_laststatval;
1275	data.statcache = PL_statcache;	1385	data->statcache = PL_statcache;
1276
1277	RETVAL = newSVpvn ((char *)&data, sizeof data);
1278	}	1386	}
1279	OUTPUT:	1387	OUTPUT:
1280	RETVAL	1388	RETVAL
1281		1389
1282	void	1390	void
1283	_set_state (char *data_)	1391	_set_state (char *data_)
1284	PROTOTYPE: $	1392	PROTOTYPE: $
1285	CODE:	1393	CODE:
1286	{	1394	{
1287	struct {	1395	struct io_state *data = (void *)data_;
1288	int errorno;
1289	int laststype;
1290	int laststatval;
1291	Stat_t statcache;
1292	} *data = (void *)data_;
1293		1396
1294	errno = data->errorno;	1397	errno = data->errorno;
1295	PL_laststype = data->laststype;	1398	PL_laststype = data->laststype;
1296	PL_laststatval = data->laststatval;	1399	PL_laststatval = data->laststatval;
1297	PL_statcache = data->statcache;	1400	PL_statcache = data->statcache;
1298	}	1401	}
		1402

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines