[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.122 by root, Mon Dec 4 13:47:56 2006 UTC vs.
Revision 1.194 by root, Sat Oct 6 00:08:04 2007 UTC

…		…
1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	/* the maximum number of idle cctx that will be pooled */
14	#define MAX_IDLE_CCTX 8
15
16	#define PERL_VERSION_ATLEAST(a,b,c) \
17	(PERL_REVISION > (a) \
18	\|\| (PERL_REVISION == (a) \
19	&& (PERL_VERSION > (b) \
20	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
21
22	#if !PERL_VERSION_ATLEAST (5,6,0)
23	# ifndef PL_ppaddr
24	# define PL_ppaddr ppaddr
25	# endif
26	# ifndef call_sv
27	# define call_sv perl_call_sv
28	# endif
29	# ifndef get_sv
30	# define get_sv perl_get_sv
31	# endif
32	# ifndef get_cv
33	# define get_cv perl_get_cv
34	# endif
35	# ifndef IS_PADGV
36	# define IS_PADGV(v) 0
37	# endif
38	# ifndef IS_PADCONST
39	# define IS_PADCONST(v) 0
40	# endif
41	#endif
42
43	#include <stdio.h>	11	#include <stdio.h>
44	#include <errno.h>	12	#include <errno.h>
45		13	#include <assert.h>
46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	# undef STACKGUARD
48	#endif
49
50	#ifndef STACKGUARD
51	# define STACKGUARD 0
52	#endif
53		14
54	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
55	# include <unistd.h>	16	# include <unistd.h>
56	# include <sys/mman.h>	17	# include <sys/mman.h>
57	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
72	#else	33	#else
73	# define PAGESIZE 0	34	# define PAGESIZE 0
74	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
75	#endif	36	#endif
76		37
77	/* The next macro should declare a variable stacklevel that contains and approximation	38	#if CORO_USE_VALGRIND
78	* to the current C stack pointer. Its property is that it changes with each call	39	# include <valgrind/valgrind.h>
79	* and should be unique. */	40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	\|\| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
		55	# ifndef PL_ppaddr
		56	# define PL_ppaddr ppaddr
		57	# endif
		58	# ifndef call_sv
		59	# define call_sv perl_call_sv
		60	# endif
		61	# ifndef get_sv
		62	# define get_sv perl_get_sv
		63	# endif
		64	# ifndef get_cv
		65	# define get_cv perl_get_cv
		66	# endif
		67	# ifndef IS_PADGV
		68	# define IS_PADGV(v) 0
		69	# endif
		70	# ifndef IS_PADCONST
		71	# define IS_PADCONST(v) 0
		72	# endif
		73	#endif
		74
		75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	/* 5.8.8 */
		81	#ifndef GV_NOTQUAL
		82	# define GV_NOTQUAL 0
		83	#endif
		84	#ifndef newSV
		85	# define newSV(l) NEWSV(0,l)
		86	#endif
		87
		88	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		89	# undef CORO_STACKGUARD
		90	#endif
		91
		92	#ifndef CORO_STACKGUARD
		93	# define CORO_STACKGUARD 0
		94	#endif
		95
		96	/* prefer perl internal functions over our own? */
		97	#ifndef CORO_PREFER_PERL_FUNCTIONS
		98	# define CORO_PREFER_PERL_FUNCTIONS 0
		99	#endif
		100
		101	/* The next macros try to return the current stack pointer, in an as
		102	* portable way as possible. */
80	#define dSTACKLEVEL int stacklevel	103	#define dSTACKLEVEL volatile char stacklevel
81	#define STACKLEVEL ((void *)&stacklevel)	104	#define STACKLEVEL ((void *)&stacklevel)
82		105
83	#define IN_DESTRUCT (PL_main_cv == Nullcv)	106	#define IN_DESTRUCT (PL_main_cv == Nullcv)
84		107
85	#if __GNUC__ >= 3	108	#if __GNUC__ >= 3
86	# define attribute(x) __attribute__(x)	109	# define attribute(x) __attribute__(x)
		110	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		111	# define expect(expr,value) __builtin_expect ((expr),(value))
87	#else	112	#else
88	# define attribute(x)	113	# define attribute(x)
		114	# define BARRIER
		115	# define expect(expr,value) (expr)
89	#endif	116	#endif
		117
		118	#define expect_false(expr) expect ((expr) != 0, 0)
		119	#define expect_true(expr) expect ((expr) != 0, 1)
90		120
91	#define NOINLINE attribute ((noinline))	121	#define NOINLINE attribute ((noinline))
92		122
93	#include "CoroAPI.h"	123	#include "CoroAPI.h"
94		124
…		…
99	#else	129	#else
100	# define LOCK (void)0	130	# define LOCK (void)0
101	# define UNLOCK (void)0	131	# define UNLOCK (void)0
102	#endif	132	#endif
103		133
		134	/* helper storage struct for Coro::AIO */
104	struct io_state	135	struct io_state
105	{	136	{
106	int errorno;	137	int errorno;
107	I32 laststype;	138	I32 laststype;
108	int laststatval;	139	int laststatval;
109	Stat_t statcache;	140	Stat_t statcache;
110	};	141	};
111		142
		143	static size_t coro_stacksize = CORO_STACKSIZE;
112	static struct CoroAPI coroapi;	144	static struct CoroAPI coroapi;
113	static AV main_mainstack; / used to differentiate between $main and others */	145	static AV main_mainstack; / used to differentiate between $main and others */
		146	static JMPENV *main_top_env;
114	static HV coro_state_stash, coro_stash;	147	static HV coro_state_stash, coro_stash;
115	static SV coro_mortal; / will be freed after next transfer */	148	static SV coro_mortal; / will be freed after next transfer */
116		149
		150	static GV irsgv; / $/ */
		151	static GV stdoutgv; / STDOUT /
		152
		153	/* async_pool helper stuff */
		154	static SV *sv_pool_rss;
		155	static SV *sv_pool_size;
		156	static AV *av_async_pool;
		157
117	static struct coro_cctx *cctx_first;	158	static struct coro_cctx *cctx_first;
118	static int cctx_count, cctx_idle;	159	static int cctx_count, cctx_idle;
		160
		161	enum {
		162	CC_MAPPED = 0x01,
		163	CC_NOREUSE = 0x02, /* throw this away after tracing */
		164	CC_TRACE = 0x04,
		165	CC_TRACE_SUB = 0x08, /* trace sub calls */
		166	CC_TRACE_LINE = 0x10, /* trace each statement */
		167	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		168	};
119		169
120	/* this is a structure representing a c-level coroutine */	170	/* this is a structure representing a c-level coroutine */
121	typedef struct coro_cctx {	171	typedef struct coro_cctx {
122	struct coro_cctx *next;	172	struct coro_cctx *next;
123		173
124	/* the stack */	174	/* the stack */
125	void *sptr;	175	void *sptr;
126	long ssize; /* positive == mmap, otherwise malloc */	176	size_t ssize;
127		177
128	/* cpu state */	178	/* cpu state */
129	void idle_sp; / sp of top-level transfer/schedule/cede call */	179	void idle_sp; / sp of top-level transfer/schedule/cede call */
		180	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
130	JMPENV *top_env;	181	JMPENV *top_env;
131	coro_context cctx;	182	coro_context cctx;
132		183
133	int inuse;
134
135	#if USE_VALGRIND	184	#if CORO_USE_VALGRIND
136	int valgrind_id;	185	int valgrind_id;
137	#endif	186	#endif
		187	unsigned char flags;
138	} coro_cctx;	188	} coro_cctx;
139		189
140	enum {	190	enum {
141	CF_RUNNING = 0x0001, /* coroutine is running */	191	CF_RUNNING = 0x0001, /* coroutine is running */
142	CF_READY = 0x0002, /* coroutine is ready */	192	CF_READY = 0x0002, /* coroutine is ready */
143	CF_NEW = 0x0004, /* ahs never been switched to */	193	CF_NEW = 0x0004, /* has never been switched to */
		194	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
144	};	195	};
145		196
146	/* this is a structure representing a perl-level coroutine */	197	/* this is a structure representing a perl-level coroutine */
147	struct coro {	198	struct coro {
148	/* the c coroutine allocated to this perl coroutine, if any */	199	/* the c coroutine allocated to this perl coroutine, if any */
149	coro_cctx *cctx;	200	coro_cctx *cctx;
150		201
151	/* data associated with this coroutine (initial args) */	202	/* data associated with this coroutine (initial args) */
152	AV *args;	203	AV *args;
153	int refcnt;	204	int refcnt;
154	int save; /* CORO_SAVE flags */
155	int flags; /* CF_ flags */	205	int flags; /* CF_ flags */
156		206
157	/* optionally saved, might be zero */	207	/* optionally saved, might be zero */
158	AV defav; / @_ */	208	AV defav; / @_ */
159	SV defsv; / $_ */	209	SV defsv; / $_ */
160	SV errsv; / $@ */	210	SV errsv; / $@ */
		211	SV deffh; / default filehandle */
161	SV irssv; / $/ */	212	SV irssv; / $/ */
		213	SV irssv_sv; / real $/ cache */
162		214
163	#define VAR(name,type) type name;	215	#define VAR(name,type) type name;
164	# include "state.h"	216	# include "state.h"
165	#undef VAR	217	#undef VAR
166		218
		219	/* statistics */
		220	int usecount; /* number of transfers to this coro */
		221
167	/* coro process data */	222	/* coro process data */
168	int prio;	223	int prio;
		224	//SV *throw;
		225
		226	/* async_pool */
		227	SV *saved_deffh;
		228
		229	/* linked list */
		230	struct coro next, prev;
		231	HV hv; / the perl hash associated with this coro, if any */
169	};	232	};
170		233
171	typedef struct coro *Coro__State;	234	typedef struct coro *Coro__State;
172	typedef struct coro *Coro__State_or_hashref;	235	typedef struct coro *Coro__State_or_hashref;
173		236
		237	/ Coro ******************************************************************/
		238
		239	#define PRIO_MAX 3
		240	#define PRIO_HIGH 1
		241	#define PRIO_NORMAL 0
		242	#define PRIO_LOW -1
		243	#define PRIO_IDLE -3
		244	#define PRIO_MIN -4
		245
		246	/* for Coro.pm */
		247	static SV *coro_current;
		248	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		249	static int coro_nready;
		250	static struct coro *coro_first;
		251
		252	/ lowlevel stuff ********************************************************/
		253
174	static AV *	254	static AV *
175	coro_clone_padlist (CV *cv)	255	coro_clone_padlist (pTHX_ CV *cv)
176	{	256	{
177	AV *padlist = CvPADLIST (cv);	257	AV *padlist = CvPADLIST (cv);
178	AV newpadlist, newpad;	258	AV newpadlist, newpad;
179		259
180	newpadlist = newAV ();	260	newpadlist = newAV ();
…		…
192		272
193	return newpadlist;	273	return newpadlist;
194	}	274	}
195		275
196	static void	276	static void
197	free_padlist (AV *padlist)	277	free_padlist (pTHX_ AV *padlist)
198	{	278	{
199	/* may be during global destruction */	279	/* may be during global destruction */
200	if (SvREFCNT (padlist))	280	if (SvREFCNT (padlist))
201	{	281	{
202	I32 i = AvFILLp (padlist);	282	I32 i = AvFILLp (padlist);
…		…
223	AV *padlist;	303	AV *padlist;
224	AV av = (AV )mg->mg_obj;	304	AV av = (AV )mg->mg_obj;
225		305
226	/* casting is fun. */	306	/* casting is fun. */
227	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	307	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
228	free_padlist (padlist);	308	free_padlist (aTHX_ padlist);
229		309
230	SvREFCNT_dec (av);	310	SvREFCNT_dec (av);
231		311
232	return 0;	312	return 0;
233	}	313	}
…		…
241	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \	321	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
242	? SvMAGIC (cv) \	322	? SvMAGIC (cv) \
243	: mg_find ((SV *)cv, PERL_MAGIC_coro) \	323	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
244	: 0	324	: 0
245		325
		326	static struct coro *
		327	SvSTATE_ (pTHX_ SV *coro)
		328	{
		329	HV *stash;
		330	MAGIC *mg;
		331
		332	if (SvROK (coro))
		333	coro = SvRV (coro);
		334
		335	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		336	croak ("Coro::State object required");
		337
		338	stash = SvSTASH (coro);
		339	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		340	{
		341	/* very slow, but rare, check */
		342	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		343	croak ("Coro::State object required");
		344	}
		345
		346	mg = CORO_MAGIC (coro);
		347	return (struct coro *)mg->mg_ptr;
		348	}
		349
		350	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		351
246	/* the next two functions merely cache the padlists */	352	/* the next two functions merely cache the padlists */
247	static void	353	static void
248	get_padlist (CV *cv)	354	get_padlist (pTHX_ CV *cv)
249	{	355	{
250	MAGIC *mg = CORO_MAGIC (cv);	356	MAGIC *mg = CORO_MAGIC (cv);
251	AV *av;	357	AV *av;
252		358
253	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)	359	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
254	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];	360	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
255	else	361	else
256	{	362	{
257	#if 0	363	#if CORO_PREFER_PERL_FUNCTIONS
258	/* this is probably cleaner, but also slower? */	364	/* this is probably cleaner, but also slower? */
259	CV *cp = Perl_cv_clone (cv);	365	CV *cp = Perl_cv_clone (cv);
260	CvPADLIST (cv) = CvPADLIST (cp);	366	CvPADLIST (cv) = CvPADLIST (cp);
261	CvPADLIST (cp) = 0;	367	CvPADLIST (cp) = 0;
262	SvREFCNT_dec (cp);	368	SvREFCNT_dec (cp);
263	#else	369	#else
264	CvPADLIST (cv) = coro_clone_padlist (cv);	370	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
265	#endif	371	#endif
266	}	372	}
267	}	373	}
268		374
269	static void	375	static void
270	put_padlist (CV *cv)	376	put_padlist (pTHX_ CV *cv)
271	{	377	{
272	MAGIC *mg = CORO_MAGIC (cv);	378	MAGIC *mg = CORO_MAGIC (cv);
273	AV *av;	379	AV *av;
274		380
275	if (!mg)	381	if (expect_false (!mg))
276	{	382	{
277	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	383	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
278	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	384	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
279	mg->mg_virtual = &vtbl_coro;	385	mg->mg_virtual = &vtbl_coro;
280	mg->mg_obj = (SV *)newAV ();	386	mg->mg_obj = (SV *)newAV ();
281	}	387	}
282		388
283	av = (AV *)mg->mg_obj;	389	av = (AV *)mg->mg_obj;
284		390
285	if (AvFILLp (av) >= AvMAX (av))	391	if (expect_false (AvFILLp (av) >= AvMAX (av)))
286	av_extend (av, AvMAX (av) + 1);	392	av_extend (av, AvMAX (av) + 1);
287		393
288	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);	394	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
289	}	395	}
290		396
291	#define SB do {	397	/ load & save, init *****************************************************/
292	#define SE } while (0)
293		398
294	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
295
296	static void	399	static void
297	load_perl (Coro__State c)	400	load_perl (pTHX_ Coro__State c)
298	{	401	{
299	#define VAR(name,type) PL_ ## name = c->name;	402	#define VAR(name,type) PL_ ## name = c->name;
300	# include "state.h"	403	# include "state.h"
301	#undef VAR	404	#undef VAR
302		405
303	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	406	GvSV (PL_defgv) = c->defsv;
304	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	407	GvAV (PL_defgv) = c->defav;
305	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	408	GvSV (PL_errgv) = c->errsv;
306	if (c->irssv) REPLACE_SV (PL_rs , c->irssv);	409	GvSV (irsgv) = c->irssv_sv;
307		410
308	{	411	{
309	dSP;	412	dSP;
310	CV *cv;	413	CV *cv;
311		414
312	/* now do the ugly restore mess */	415	/* now do the ugly restore mess */
313	while ((cv = (CV *)POPs))	416	while (expect_true (cv = (CV *)POPs))
314	{	417	{
315	put_padlist (cv); /* mark this padlist as available */	418	put_padlist (aTHX_ cv); /* mark this padlist as available */
316	CvDEPTH (cv) = PTR2IV (POPs);	419	CvDEPTH (cv) = PTR2IV (POPs);
317	CvPADLIST (cv) = (AV *)POPs;	420	CvPADLIST (cv) = (AV *)POPs;
318	}	421	}
319		422
320	PUTBACK;	423	PUTBACK;
321	}	424	}
322	}	425	}
323		426
324	static void	427	static void
325	save_perl (Coro__State c)	428	save_perl (pTHX_ Coro__State c)
326	{	429	{
327	{	430	{
328	dSP;	431	dSP;
329	I32 cxix = cxstack_ix;	432	I32 cxix = cxstack_ix;
330	PERL_CONTEXT *ccstk = cxstack;	433	PERL_CONTEXT *ccstk = cxstack;
…		…
333	/*	436	/*
334	* the worst thing you can imagine happens first - we have to save	437	* the worst thing you can imagine happens first - we have to save
335	* (and reinitialize) all cv's in the whole callchain :(	438	* (and reinitialize) all cv's in the whole callchain :(
336	*/	439	*/
337		440
338	PUSHs (Nullsv);	441	XPUSHs (Nullsv);
339	/* this loop was inspired by pp_caller */	442	/* this loop was inspired by pp_caller */
340	for (;;)	443	for (;;)
341	{	444	{
342	while (cxix >= 0)	445	while (expect_true (cxix >= 0))
343	{	446	{
344	PERL_CONTEXT *cx = &ccstk[cxix--];	447	PERL_CONTEXT *cx = &ccstk[cxix--];
345		448
346	if (CxTYPE (cx) == CXt_SUB)	449	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
347	{	450	{
348	CV *cv = cx->blk_sub.cv;	451	CV *cv = cx->blk_sub.cv;
349		452
350	if (CvDEPTH (cv))	453	if (expect_true (CvDEPTH (cv)))
351	{	454	{
352	EXTEND (SP, 3);	455	EXTEND (SP, 3);
353
354	PUSHs ((SV *)CvPADLIST (cv));	456	PUSHs ((SV *)CvPADLIST (cv));
355	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));	457	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
356	PUSHs ((SV *)cv);	458	PUSHs ((SV *)cv);
357		459
358	CvDEPTH (cv) = 0;	460	CvDEPTH (cv) = 0;
359	get_padlist (cv);	461	get_padlist (aTHX_ cv);
360	}	462	}
361	}	463	}
362	#ifdef CXt_FORMAT
363	else if (CxTYPE (cx) == CXt_FORMAT)
364	{
365	/* I never used formats, so how should I know how these are implemented? */
366	/* my bold guess is as a simple, plain sub... */
367	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
368	}
369	#endif
370	}	464	}
371		465
372	if (top_si->si_type == PERLSI_MAIN)	466	if (expect_true (top_si->si_type == PERLSI_MAIN))
373	break;	467	break;
374		468
375	top_si = top_si->si_prev;	469	top_si = top_si->si_prev;
376	ccstk = top_si->si_cxstack;	470	ccstk = top_si->si_cxstack;
377	cxix = top_si->si_cxix;	471	cxix = top_si->si_cxix;
378	}	472	}
379		473
380	PUTBACK;	474	PUTBACK;
381	}	475	}
382		476
383	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	477	c->defav = GvAV (PL_defgv);
384	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	478	c->defsv = DEFSV;
385	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	479	c->errsv = ERRSV;
386	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;	480	c->irssv_sv = GvSV (irsgv);
387		481
388	#define VAR(name,type)c->name = PL_ ## name;	482	#define VAR(name,type)c->name = PL_ ## name;
389	# include "state.h"	483	# include "state.h"
390	#undef VAR	484	#undef VAR
391	}	485	}
…		…
394	* allocate various perl stacks. This is an exact copy	488	* allocate various perl stacks. This is an exact copy
395	* of perl.c:init_stacks, except that it uses less memory	489	* of perl.c:init_stacks, except that it uses less memory
396	* on the (sometimes correct) assumption that coroutines do	490	* on the (sometimes correct) assumption that coroutines do
397	* not usually need a lot of stackspace.	491	* not usually need a lot of stackspace.
398	*/	492	*/
		493	#if CORO_PREFER_PERL_FUNCTIONS
		494	# define coro_init_stacks init_stacks
		495	#else
399	static void	496	static void
400	coro_init_stacks ()	497	coro_init_stacks (pTHX)
401	{	498	{
402	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));	499	PL_curstackinfo = new_stackinfo(64, 6);
403	PL_curstackinfo->si_type = PERLSI_MAIN;	500	PL_curstackinfo->si_type = PERLSI_MAIN;
404	PL_curstack = PL_curstackinfo->si_stack;	501	PL_curstack = PL_curstackinfo->si_stack;
405	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	502	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
406		503
407	PL_stack_base = AvARRAY(PL_curstack);	504	PL_stack_base = AvARRAY(PL_curstack);
408	PL_stack_sp = PL_stack_base;	505	PL_stack_sp = PL_stack_base;
409	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	506	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
410		507
411	New(50,PL_tmps_stack,128,SV*);	508	New(50,PL_tmps_stack,64,SV*);
412	PL_tmps_floor = -1;	509	PL_tmps_floor = -1;
413	PL_tmps_ix = -1;	510	PL_tmps_ix = -1;
414	PL_tmps_max = 128;	511	PL_tmps_max = 64;
415		512
416	New(54,PL_markstack,32,I32);	513	New(54,PL_markstack,16,I32);
417	PL_markstack_ptr = PL_markstack;	514	PL_markstack_ptr = PL_markstack;
418	PL_markstack_max = PL_markstack + 32;	515	PL_markstack_max = PL_markstack + 16;
419		516
420	#ifdef SET_MARK_OFFSET	517	#ifdef SET_MARK_OFFSET
421	SET_MARK_OFFSET;	518	SET_MARK_OFFSET;
422	#endif	519	#endif
423		520
424	New(54,PL_scopestack,32,I32);	521	New(54,PL_scopestack,16,I32);
425	PL_scopestack_ix = 0;	522	PL_scopestack_ix = 0;
426	PL_scopestack_max = 32;	523	PL_scopestack_max = 16;
427		524
428	New(54,PL_savestack,64,ANY);	525	New(54,PL_savestack,64,ANY);
429	PL_savestack_ix = 0;	526	PL_savestack_ix = 0;
430	PL_savestack_max = 64;	527	PL_savestack_max = 64;
431		528
432	#if !PERL_VERSION_ATLEAST (5,9,0)	529	#if !PERL_VERSION_ATLEAST (5,9,0)
433	New(54,PL_retstack,16,OP*);	530	New(54,PL_retstack,4,OP*);
434	PL_retstack_ix = 0;	531	PL_retstack_ix = 0;
435	PL_retstack_max = 16;	532	PL_retstack_max = 4;
436	#endif	533	#endif
437	}	534	}
		535	#endif
438		536
439	/*	537	/*
440	* destroy the stacks, the callchain etc...	538	* destroy the stacks, the callchain etc...
441	*/	539	*/
442	static void	540	static void
443	coro_destroy_stacks ()	541	coro_destroy_stacks (pTHX)
444	{	542	{
445	if (!IN_DESTRUCT)
446	{
447	/* is this ugly, I ask? */
448	LEAVE_SCOPE (0);
449
450	/* sure it is, but more important: is it correct?? :/ */
451	FREETMPS;
452
453	/POPSTACK_TO (PL_mainstack);//D//use/
454	}
455
456	while (PL_curstackinfo->si_next)	543	while (PL_curstackinfo->si_next)
457	PL_curstackinfo = PL_curstackinfo->si_next;	544	PL_curstackinfo = PL_curstackinfo->si_next;
458		545
459	while (PL_curstackinfo)	546	while (PL_curstackinfo)
460	{	547	{
461	PERL_SI *p = PL_curstackinfo->si_prev;	548	PERL_SI *p = PL_curstackinfo->si_prev;
462		549
463	{ /D//remove/
464	dSP;
465	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
466	PUTBACK; /* possibly superfluous */
467	}
468
469	if (!IN_DESTRUCT)	550	if (!IN_DESTRUCT)
470	{
471	dounwind (-1);/D//remove/
472	SvREFCNT_dec (PL_curstackinfo->si_stack);	551	SvREFCNT_dec (PL_curstackinfo->si_stack);
473	}
474		552
475	Safefree (PL_curstackinfo->si_cxstack);	553	Safefree (PL_curstackinfo->si_cxstack);
476	Safefree (PL_curstackinfo);	554	Safefree (PL_curstackinfo);
477	PL_curstackinfo = p;	555	PL_curstackinfo = p;
478	}	556	}
…		…
484	#if !PERL_VERSION_ATLEAST (5,9,0)	562	#if !PERL_VERSION_ATLEAST (5,9,0)
485	Safefree (PL_retstack);	563	Safefree (PL_retstack);
486	#endif	564	#endif
487	}	565	}
488		566
489	static void	567	static size_t
490	setup_coro (struct coro *coro)	568	coro_rss (pTHX_ struct coro *coro)
		569	{
		570	size_t rss = sizeof (*coro);
		571
		572	if (coro->mainstack)
		573	{
		574	if (coro->flags & CF_RUNNING)
		575	{
		576	#define VAR(name,type)coro->name = PL_ ## name;
		577	# include "state.h"
		578	#undef VAR
		579	}
		580
		581	rss += sizeof (coro->curstackinfo);
		582	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		583	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		584	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		585	rss += coro->tmps_max * sizeof (SV *);
		586	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		587	rss += coro->scopestack_max * sizeof (I32);
		588	rss += coro->savestack_max * sizeof (ANY);
		589
		590	#if !PERL_VERSION_ATLEAST (5,9,0)
		591	rss += coro->retstack_max * sizeof (OP *);
		592	#endif
		593	}
		594
		595	return rss;
		596	}
		597
		598	/ coroutine stack handling **********************************************/
		599
		600	static void
		601	coro_setup (pTHX_ struct coro *coro)
491	{	602	{
492	/*	603	/*
493	* emulate part of the perl startup here.	604	* emulate part of the perl startup here.
494	*/	605	*/
495
496	coro_init_stacks ();	606	coro_init_stacks (aTHX);
497		607
		608	PL_runops = RUNOPS_DEFAULT;
498	PL_curcop = &PL_compiling;	609	PL_curcop = &PL_compiling;
499	PL_in_eval = EVAL_NULL;	610	PL_in_eval = EVAL_NULL;
		611	PL_comppad = 0;
500	PL_curpm = 0;	612	PL_curpm = 0;
501	PL_localizing = 0;	613	PL_localizing = 0;
502	PL_dirty = 0;	614	PL_dirty = 0;
503	PL_restartop = 0;	615	PL_restartop = 0;
		616
		617	GvSV (PL_defgv) = newSV (0);
		618	GvAV (PL_defgv) = coro->args; coro->args = 0;
		619	GvSV (PL_errgv) = newSV (0);
		620	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		621	PL_rs = newSVsv (GvSV (irsgv));
		622	PL_defoutgv = SvREFCNT_inc (stdoutgv);
		623
		624	ENTER; /* necessary e.g. for dounwind */
504		625
505	{	626	{
506	dSP;	627	dSP;
507	LOGOP myop;	628	LOGOP myop;
508		629
509	SvREFCNT_dec (GvAV (PL_defgv));
510	GvAV (PL_defgv) = coro->args; coro->args = 0;
511
512	Zero (&myop, 1, LOGOP);	630	Zero (&myop, 1, LOGOP);
513	myop.op_next = Nullop;	631	myop.op_next = Nullop;
514	myop.op_flags = OPf_WANT_VOID;	632	myop.op_flags = OPf_WANT_VOID;
515		633
516	PUSHMARK (SP);	634	PUSHMARK (SP);
517	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));	635	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
518	PUTBACK;	636	PUTBACK;
519	PL_op = (OP *)&myop;	637	PL_op = (OP *)&myop;
520	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	638	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
521	SPAGAIN;	639	SPAGAIN;
522	}	640	}
523
524	ENTER; /* necessary e.g. for dounwind */
525	}	641	}
526		642
527	static void	643	static void
		644	coro_destroy (pTHX_ struct coro *coro)
		645	{
		646	if (!IN_DESTRUCT)
		647	{
		648	/* restore all saved variables and stuff */
		649	LEAVE_SCOPE (0);
		650	assert (PL_tmps_floor == -1);
		651
		652	/* free all temporaries */
		653	FREETMPS;
		654	assert (PL_tmps_ix == -1);
		655
		656	/* unwind all extra stacks */
		657	POPSTACK_TO (PL_mainstack);
		658
		659	/* unwind main stack */
		660	dounwind (-1);
		661	}
		662
		663	SvREFCNT_dec (GvSV (PL_defgv));
		664	SvREFCNT_dec (GvAV (PL_defgv));
		665	SvREFCNT_dec (GvSV (PL_errgv));
		666	SvREFCNT_dec (PL_defoutgv);
		667	SvREFCNT_dec (PL_rs);
		668	SvREFCNT_dec (GvSV (irsgv));
		669
		670	SvREFCNT_dec (coro->saved_deffh);
		671	//SvREFCNT_dec (coro->throw);
		672
		673	coro_destroy_stacks (aTHX);
		674	}
		675
		676	static void
528	free_coro_mortal ()	677	free_coro_mortal (pTHX)
529	{	678	{
530	if (coro_mortal)	679	if (expect_true (coro_mortal))
531	{	680	{
532	SvREFCNT_dec (coro_mortal);	681	SvREFCNT_dec (coro_mortal);
533	coro_mortal = 0;	682	coro_mortal = 0;
534	}	683	}
535	}	684	}
536		685
		686	static int
		687	runops_trace (pTHX)
		688	{
		689	COP *oldcop = 0;
		690	int oldcxix = -2;
		691	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		692	coro_cctx *cctx = coro->cctx;
		693
		694	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		695	{
		696	PERL_ASYNC_CHECK ();
		697
		698	if (cctx->flags & CC_TRACE_ALL)
		699	{
		700	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		701	{
		702	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		703	SV bot, top;
		704	AV av = newAV (); / return values */
		705	SV **cb;
		706	dSP;
		707
		708	GV *gv = CvGV (cx->blk_sub.cv);
		709	SV *fullname = sv_2mortal (newSV (0));
		710	if (isGV (gv))
		711	gv_efullname3 (fullname, gv, 0);
		712
		713	bot = PL_stack_base + cx->blk_oldsp + 1;
		714	top = cx->blk_gimme == G_ARRAY ? SP + 1
		715	: cx->blk_gimme == G_SCALAR ? bot + 1
		716	: bot;
		717
		718	av_extend (av, top - bot);
		719	while (bot < top)
		720	av_push (av, SvREFCNT_inc (*bot++));
		721
		722	PL_runops = RUNOPS_DEFAULT;
		723	ENTER;
		724	SAVETMPS;
		725	EXTEND (SP, 3);
		726	PUSHMARK (SP);
		727	PUSHs (&PL_sv_no);
		728	PUSHs (fullname);
		729	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		730	PUTBACK;
		731	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		732	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		733	SPAGAIN;
		734	FREETMPS;
		735	LEAVE;
		736	PL_runops = runops_trace;
		737	}
		738
		739	if (oldcop != PL_curcop)
		740	{
		741	oldcop = PL_curcop;
		742
		743	if (PL_curcop != &PL_compiling)
		744	{
		745	SV **cb;
		746
		747	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		748	{
		749	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		750
		751	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		752	{
		753	runops_proc_t old_runops = PL_runops;
		754	dSP;
		755	GV *gv = CvGV (cx->blk_sub.cv);
		756	SV *fullname = sv_2mortal (newSV (0));
		757
		758	if (isGV (gv))
		759	gv_efullname3 (fullname, gv, 0);
		760
		761	PL_runops = RUNOPS_DEFAULT;
		762	ENTER;
		763	SAVETMPS;
		764	EXTEND (SP, 3);
		765	PUSHMARK (SP);
		766	PUSHs (&PL_sv_yes);
		767	PUSHs (fullname);
		768	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		769	PUTBACK;
		770	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		771	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		772	SPAGAIN;
		773	FREETMPS;
		774	LEAVE;
		775	PL_runops = runops_trace;
		776	}
		777
		778	oldcxix = cxstack_ix;
		779	}
		780
		781	if (cctx->flags & CC_TRACE_LINE)
		782	{
		783	dSP;
		784
		785	PL_runops = RUNOPS_DEFAULT;
		786	ENTER;
		787	SAVETMPS;
		788	EXTEND (SP, 3);
		789	PL_runops = RUNOPS_DEFAULT;
		790	PUSHMARK (SP);
		791	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		792	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		793	PUTBACK;
		794	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		795	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		796	SPAGAIN;
		797	FREETMPS;
		798	LEAVE;
		799	PL_runops = runops_trace;
		800	}
		801	}
		802	}
		803	}
		804	}
		805
		806	TAINT_NOT;
		807	return 0;
		808	}
		809
537	/* inject a fake call to Coro::State::_cctx_init into the execution */	810	/* inject a fake call to Coro::State::_cctx_init into the execution */
		811	/* _cctx_init should be careful, as it could be called at almost any time */
		812	/* during execution of a perl program */
538	static void NOINLINE	813	static void NOINLINE
539	prepare_cctx (coro_cctx *cctx)	814	prepare_cctx (pTHX_ coro_cctx *cctx)
540	{	815	{
541	dSP;	816	dSP;
542	LOGOP myop;	817	LOGOP myop;
		818
		819	PL_top_env = &PL_start_env;
		820
		821	if (cctx->flags & CC_TRACE)
		822	PL_runops = runops_trace;
543		823
544	Zero (&myop, 1, LOGOP);	824	Zero (&myop, 1, LOGOP);
545	myop.op_next = PL_op;	825	myop.op_next = PL_op;
546	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;	826	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
547		827
…		…
553	PL_op = (OP *)&myop;	833	PL_op = (OP *)&myop;
554	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	834	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
555	SPAGAIN;	835	SPAGAIN;
556	}	836	}
557		837
		838	/*
		839	* this is a _very_ stripped down perl interpreter ;)
		840	*/
558	static void	841	static void
559	coro_run (void *arg)	842	coro_run (void *arg)
560	{	843	{
		844	dTHX;
		845
561	/* coro_run is the alternative tail of transfer(), so unlock here. */	846	/* coro_run is the alternative tail of transfer(), so unlock here. */
562	UNLOCK;	847	UNLOCK;
563		848
564	/*	849	/* we now skip the entersub that lead to transfer() */
565	* this is a _very_ stripped down perl interpreter ;)	850	PL_op = PL_op->op_next;
566	*/
567	PL_top_env = &PL_start_env;
568		851
569	/* inject call to cctx_init */	852	/* inject a fake subroutine call to cctx_init */
570	prepare_cctx ((coro_cctx *)arg);	853	prepare_cctx (aTHX_ (coro_cctx *)arg);
571		854
572	/* somebody will hit me for both perl_run and PL_restartop */	855	/* somebody or something will hit me for both perl_run and PL_restartop */
573	PL_restartop = PL_op;	856	PL_restartop = PL_op;
574	perl_run (PL_curinterp);	857	perl_run (PL_curinterp);
575		858
576	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	859	/*
577	abort ();	860	* If perl-run returns we assume exit() was being called or the coro
		861	* fell off the end, which seems to be the only valid (non-bug)
		862	* reason for perl_run to return. We try to exit by jumping to the
		863	* bootstrap-time "top" top_env, as we cannot restore the "main"
		864	* coroutine as Coro has no such concept
		865	*/
		866	PL_top_env = main_top_env;
		867	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
578	}	868	}
579		869
580	static coro_cctx *	870	static coro_cctx *
581	cctx_new ()	871	cctx_new ()
582	{	872	{
583	coro_cctx *cctx;	873	coro_cctx *cctx;
		874	void *stack_start;
		875	size_t stack_size;
584		876
585	++cctx_count;	877	++cctx_count;
586		878
587	New (0, cctx, 1, coro_cctx);	879	Newz (0, cctx, 1, coro_cctx);
588		880
589	#if HAVE_MMAP	881	#if HAVE_MMAP
590		882
591	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	883	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
592	/* mmap supposedly does allocate-on-write for us */	884	/* mmap supposedly does allocate-on-write for us */
593	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	885	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
594		886
595	if (cctx->sptr == (void *)-1)	887	if (cctx->sptr != (void *)-1)
596	{
597	perror ("FATAL: unable to mmap stack for coroutine");
598	_exit (EXIT_FAILURE);
599	}	888	{
600
601	# if STACKGUARD	889	# if CORO_STACKGUARD
602	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	890	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
603	# endif	891	# endif
		892	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		893	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		894	cctx->flags \|= CC_MAPPED;
		895	}
		896	else
		897	#endif
		898	{
		899	cctx->ssize = coro_stacksize * (long)sizeof (long);
		900	New (0, cctx->sptr, coro_stacksize, long);
604		901
605	#else
606
607	cctx->ssize = STACKSIZE * (long)sizeof (long);
608	New (0, cctx->sptr, STACKSIZE, long);
609
610	if (!cctx->sptr)	902	if (!cctx->sptr)
611	{	903	{
612	perror ("FATAL: unable to malloc stack for coroutine");	904	perror ("FATAL: unable to allocate stack for coroutine");
613	_exit (EXIT_FAILURE);	905	_exit (EXIT_FAILURE);
614	}	906	}
615		907
616	#endif	908	stack_start = cctx->sptr;
		909	stack_size = cctx->ssize;
		910	}
617		911
618	#if USE_VALGRIND	912	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
619	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
620	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
621	cctx->ssize + (char *)cctx->sptr
622	);
623	#endif
624
625	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	913	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
626		914
627	return cctx;	915	return cctx;
628	}	916	}
629		917
630	static void	918	static void
…		…
633	if (!cctx)	921	if (!cctx)
634	return;	922	return;
635		923
636	--cctx_count;	924	--cctx_count;
637		925
638	#if USE_VALGRIND	926	#if CORO_USE_VALGRIND
639	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	927	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
640	#endif	928	#endif
641		929
642	#if HAVE_MMAP	930	#if HAVE_MMAP
		931	if (cctx->flags & CC_MAPPED)
643	munmap (cctx->sptr, cctx->ssize);	932	munmap (cctx->sptr, cctx->ssize);
644	#else	933	else
		934	#endif
645	Safefree (cctx->sptr);	935	Safefree (cctx->sptr);
646	#endif
647		936
648	Safefree (cctx);	937	Safefree (cctx);
649	}	938	}
650		939
		940	/* wether this cctx should be destructed */
		941	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		942
651	static coro_cctx *	943	static coro_cctx *
652	cctx_get ()	944	cctx_get (pTHX)
653	{	945	{
654	coro_cctx *cctx;	946	while (expect_true (cctx_first))
655
656	if (cctx_first)
657	{	947	{
658	cctx = cctx_first;	948	coro_cctx *cctx = cctx_first;
659	cctx_first = cctx->next;	949	cctx_first = cctx->next;
660	--cctx_idle;	950	--cctx_idle;
661	}	951
662	else	952	if (expect_true (!CCTX_EXPIRED (cctx)))
663	{	953	return cctx;
664	cctx = cctx_new ();	954
665	PL_op = PL_op->op_next;	955	cctx_destroy (cctx);
666	}	956	}
667		957
668	return cctx;	958	return cctx_new ();
669	}	959	}
670		960
671	static void	961	static void
672	cctx_put (coro_cctx *cctx)	962	cctx_put (coro_cctx *cctx)
673	{	963	{
674	/* free another cctx if overlimit */	964	/* free another cctx if overlimit */
675	if (cctx_idle >= MAX_IDLE_CCTX)	965	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
676	{	966	{
677	coro_cctx *first = cctx_first;	967	coro_cctx *first = cctx_first;
678	cctx_first = first->next;	968	cctx_first = first->next;
679	--cctx_idle;	969	--cctx_idle;
680		970
681	assert (!first->inuse);
682	cctx_destroy (first);	971	cctx_destroy (first);
683	}	972	}
684		973
685	++cctx_idle;	974	++cctx_idle;
686	cctx->next = cctx_first;	975	cctx->next = cctx_first;
687	cctx_first = cctx;	976	cctx_first = cctx;
688	}	977	}
689		978
690	/* never call directly, always through the coro_state_transfer global variable */	979	/ coroutine switching ***************************************************/
		980
		981	static void
		982	transfer_check (pTHX_ struct coro prev, struct coro next)
		983	{
		984	if (expect_true (prev != next))
		985	{
		986	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		987	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		988
		989	if (expect_false (next->flags & CF_RUNNING))
		990	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		991
		992	if (expect_false (next->flags & CF_DESTROYED))
		993	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		994
		995	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		996	croak ("Coro::State::transfer called while parsing, but this is not supported");
		997	}
		998	}
		999
		1000	/* always use the TRANSFER macro */
691	static void NOINLINE	1001	static void NOINLINE
692	transfer (struct coro prev, struct coro next)	1002	transfer (pTHX_ struct coro prev, struct coro next)
693	{	1003	{
694	dSTACKLEVEL;	1004	dSTACKLEVEL;
695		1005
696	/* sometimes transfer is only called to set idle_sp */	1006	/* sometimes transfer is only called to set idle_sp */
697	if (!next)	1007	if (expect_false (!next))
		1008	{
698	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1009	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1010	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		1011	}
699	else if (prev != next)	1012	else if (expect_true (prev != next))
700	{	1013	{
701	coro_cctx *prev__cctx;	1014	coro_cctx *prev__cctx;
702		1015
703	if (prev->flags & CF_NEW)	1016	if (expect_false (prev->flags & CF_NEW))
704	{	1017	{
705	/* create a new empty context */	1018	/* create a new empty context */
706	Newz (0, prev->cctx, 1, coro_cctx);	1019	Newz (0, prev->cctx, 1, coro_cctx);
707	prev->cctx->inuse = 1;
708	prev->flags &= ~CF_NEW;	1020	prev->flags &= ~CF_NEW;
709	prev->flags \|= CF_RUNNING;	1021	prev->flags \|= CF_RUNNING;
710	}	1022	}
711		1023
712	/TODO: must not croak here /
713	if (!prev->flags & CF_RUNNING)
714	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
715
716	if (next->flags & CF_RUNNING)
717	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
718
719	prev->flags &= ~CF_RUNNING;	1024	prev->flags &= ~CF_RUNNING;
720	next->flags \|= CF_RUNNING;	1025	next->flags \|= CF_RUNNING;
721		1026
722	LOCK;	1027	LOCK;
723		1028
724	if (next->flags & CF_NEW)	1029	if (expect_false (next->flags & CF_NEW))
725	{	1030	{
726	/* need to start coroutine */	1031	/* need to start coroutine */
727	next->flags &= ~CF_NEW;	1032	next->flags &= ~CF_NEW;
728	/* first get rid of the old state */	1033	/* first get rid of the old state */
729	save_perl (prev);	1034	save_perl (aTHX_ prev);
730	/* setup coroutine call */	1035	/* setup coroutine call */
731	setup_coro (next);	1036	coro_setup (aTHX_ next);
732	/* need a new stack */
733	assert (!next->stack);
734	}	1037	}
735	else	1038	else
736	{	1039	{
737	/* coroutine already started */	1040	/* coroutine already started */
738	save_perl (prev);	1041	save_perl (aTHX_ prev);
739	load_perl (next);	1042	load_perl (aTHX_ next);
740	}	1043	}
741		1044
742	prev__cctx = prev->cctx;	1045	prev__cctx = prev->cctx;
743		1046
744	/* possibly "free" the cctx */	1047	/* possibly "free" the cctx */
745	if (prev__cctx->idle_sp == STACKLEVEL)	1048	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
746	{	1049	{
747	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */	1050	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
748	assert (PL_top_env == prev__cctx->top_env);	1051	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
749		1052
750	prev->cctx = 0;	1053	prev->cctx = 0;
751		1054
		1055	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1056	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1057	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1058	next->cctx = cctx_get (aTHX);
		1059
752	cctx_put (prev__cctx);	1060	cctx_put (prev__cctx);
753	prev__cctx->inuse = 0;
754	}	1061	}
755		1062
		1063	++next->usecount;
		1064
756	if (!next->cctx)	1065	if (expect_true (!next->cctx))
757	{
758	next->cctx = cctx_get ();	1066	next->cctx = cctx_get (aTHX);
759	assert (!next->cctx->inuse);
760	next->cctx->inuse = 1;
761	}
762		1067
763	if (prev__cctx != next->cctx)	1068	if (expect_false (prev__cctx != next->cctx))
764	{	1069	{
765	prev__cctx->top_env = PL_top_env;	1070	prev__cctx->top_env = PL_top_env;
766	PL_top_env = next->cctx->top_env;	1071	PL_top_env = next->cctx->top_env;
767	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1072	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
768	}	1073	}
769		1074
770	free_coro_mortal ();	1075	free_coro_mortal (aTHX);
771
772	UNLOCK;	1076	UNLOCK;
773	}	1077	}
774	}	1078	}
775		1079
776	struct transfer_args	1080	struct transfer_args
777	{	1081	{
778	struct coro prev, next;	1082	struct coro prev, next;
779	};	1083	};
780		1084
781	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)	1085	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1086	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
782		1087
		1088	/ high level stuff ******************************************************/
		1089
783	static void	1090	static int
784	coro_state_destroy (struct coro *coro)	1091	coro_state_destroy (pTHX_ struct coro *coro)
785	{	1092	{
786	if (coro->refcnt--)	1093	if (coro->flags & CF_DESTROYED)
787	return;	1094	return 0;
		1095
		1096	coro->flags \|= CF_DESTROYED;
		1097
		1098	if (coro->flags & CF_READY)
		1099	{
		1100	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1101	/* alternative: look through all ready queues and remove the coro */
		1102	LOCK;
		1103	--coro_nready;
		1104	UNLOCK;
		1105	}
		1106	else
		1107	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
788		1108
789	if (coro->mainstack && coro->mainstack != main_mainstack)	1109	if (coro->mainstack && coro->mainstack != main_mainstack)
790	{	1110	{
791	struct coro temp;	1111	struct coro temp;
792	Zero (&temp, 1, struct coro);
793	temp.save = CORO_SAVE_ALL;
794		1112
795	if (coro->flags & CF_RUNNING)	1113	if (coro->flags & CF_RUNNING)
796	croak ("FATAL: tried to destroy currently running coroutine");	1114	croak ("FATAL: tried to destroy currently running coroutine");
797		1115
798	save_perl (&temp);	1116	save_perl (aTHX_ &temp);
799	load_perl (coro);	1117	load_perl (aTHX_ coro);
800		1118
801	coro_destroy_stacks ();	1119	coro_destroy (aTHX_ coro);
802		1120
803	load_perl (&temp); /* this will get rid of defsv etc.. */	1121	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
804		1122
805	coro->mainstack = 0;	1123	coro->mainstack = 0;
806	}	1124	}
807		1125
808	cctx_destroy (coro->cctx);	1126	cctx_destroy (coro->cctx);
809	SvREFCNT_dec (coro->args);	1127	SvREFCNT_dec (coro->args);
810	Safefree (coro);	1128
		1129	if (coro->next) coro->next->prev = coro->prev;
		1130	if (coro->prev) coro->prev->next = coro->next;
		1131	if (coro == coro_first) coro_first = coro->next;
		1132
		1133	return 1;
811	}	1134	}
812		1135
813	static int	1136	static int
814	coro_state_clear (pTHX_ SV sv, MAGIC mg)	1137	coro_state_free (pTHX_ SV sv, MAGIC mg)
815	{	1138	{
816	struct coro coro = (struct coro )mg->mg_ptr;	1139	struct coro coro = (struct coro )mg->mg_ptr;
817	mg->mg_ptr = 0;	1140	mg->mg_ptr = 0;
818		1141
		1142	coro->hv = 0;
		1143
		1144	if (--coro->refcnt < 0)
		1145	{
819	coro_state_destroy (coro);	1146	coro_state_destroy (aTHX_ coro);
		1147	Safefree (coro);
		1148	}
820		1149
821	return 0;	1150	return 0;
822	}	1151	}
823		1152
824	static int	1153	static int
…		…
831	return 0;	1160	return 0;
832	}	1161	}
833		1162
834	static MGVTBL coro_state_vtbl = {	1163	static MGVTBL coro_state_vtbl = {
835	0, 0, 0, 0,	1164	0, 0, 0, 0,
836	coro_state_clear,	1165	coro_state_free,
837	0,	1166	0,
838	#ifdef MGf_DUP	1167	#ifdef MGf_DUP
839	coro_state_dup,	1168	coro_state_dup,
840	#else	1169	#else
841	# define MGf_DUP 0	1170	# define MGf_DUP 0
842	#endif	1171	#endif
843	};	1172	};
844		1173
845	static struct coro *
846	SvSTATE (SV *coro)
847	{
848	HV *stash;
849	MAGIC *mg;
850
851	if (SvROK (coro))
852	coro = SvRV (coro);
853
854	stash = SvSTASH (coro);
855	if (stash != coro_stash && stash != coro_state_stash)
856	{
857	/* very slow, but rare, check */
858	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
859	croak ("Coro::State object required");
860	}
861
862	mg = SvMAGIC (coro);
863	assert (mg->mg_type == PERL_MAGIC_ext);
864	return (struct coro *)mg->mg_ptr;
865	}
866
867	static void	1174	static void
868	prepare_transfer (struct transfer_args ta, SV prev_sv, SV *next_sv)	1175	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
869	{	1176	{
870	ta->prev = SvSTATE (prev_sv);	1177	ta->prev = SvSTATE (prev_sv);
871	ta->next = SvSTATE (next_sv);	1178	ta->next = SvSTATE (next_sv);
		1179	TRANSFER_CHECK (*ta);
872	}	1180	}
873		1181
874	static void	1182	static void
875	api_transfer (SV prev_sv, SV next_sv)	1183	api_transfer (SV prev_sv, SV next_sv)
876	{	1184	{
		1185	dTHX;
877	struct transfer_args ta;	1186	struct transfer_args ta;
878		1187
879	prepare_transfer (&ta, prev_sv, next_sv);	1188	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
880	TRANSFER (ta);	1189	TRANSFER (ta);
881	}	1190	}
882		1191
883	static int
884	api_save (SV *coro_sv, int new_save)
885	{
886	struct coro *coro = SvSTATE (coro_sv);
887	int old_save = coro->save;
888
889	if (new_save >= 0)
890	coro->save = new_save;
891
892	return old_save;
893	}
894
895	/ Coro ******************************************************************/	1192	/ Coro ******************************************************************/
896		1193
897	#define PRIO_MAX 3
898	#define PRIO_HIGH 1
899	#define PRIO_NORMAL 0
900	#define PRIO_LOW -1
901	#define PRIO_IDLE -3
902	#define PRIO_MIN -4
903
904	/* for Coro.pm */
905	static SV *coro_current;
906	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
907	static int coro_nready;
908
909	static void	1194	static void
910	coro_enq (SV *coro_sv)	1195	coro_enq (pTHX_ SV *coro_sv)
911	{	1196	{
912	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);	1197	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
913	coro_nready++;
914	}	1198	}
915		1199
916	static SV *	1200	static SV *
917	coro_deq (int min_prio)	1201	coro_deq (pTHX_ int min_prio)
918	{	1202	{
919	int prio = PRIO_MAX - PRIO_MIN;	1203	int prio = PRIO_MAX - PRIO_MIN;
920		1204
921	min_prio -= PRIO_MIN;	1205	min_prio -= PRIO_MIN;
922	if (min_prio < 0)	1206	if (min_prio < 0)
923	min_prio = 0;	1207	min_prio = 0;
924		1208
925	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1209	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
926	if (AvFILLp (coro_ready [prio]) >= 0)	1210	if (AvFILLp (coro_ready [prio]) >= 0)
927	{
928	coro_nready--;
929	return av_shift (coro_ready [prio]);	1211	return av_shift (coro_ready [prio]);
930	}
931		1212
932	return 0;	1213	return 0;
933	}	1214	}
934		1215
935	static int	1216	static int
936	api_ready (SV *coro_sv)	1217	api_ready (SV *coro_sv)
937	{	1218	{
		1219	dTHX;
938	struct coro *coro;	1220	struct coro *coro;
939		1221
940	if (SvROK (coro_sv))	1222	if (SvROK (coro_sv))
941	coro_sv = SvRV (coro_sv);	1223	coro_sv = SvRV (coro_sv);
942		1224
943	coro = SvSTATE (coro_sv);	1225	coro = SvSTATE (coro_sv);
944		1226
945	if (coro->flags & CF_READY)	1227	if (coro->flags & CF_READY)
946	return 0;	1228	return 0;
947		1229
948	#if 0 /* this is actually harmless */
949	if (coro->flags & CF_RUNNING)
950	croak ("Coro::ready called on currently running coroutine");
951	#endif
952
953	coro->flags \|= CF_READY;	1230	coro->flags \|= CF_READY;
954		1231
955	LOCK;	1232	LOCK;
956	coro_enq (SvREFCNT_inc (coro_sv));	1233	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1234	++coro_nready;
957	UNLOCK;	1235	UNLOCK;
958		1236
959	return 1;	1237	return 1;
960	}	1238	}
961		1239
962	static int	1240	static int
963	api_is_ready (SV *coro_sv)	1241	api_is_ready (SV *coro_sv)
964	{	1242	{
		1243	dTHX;
965	return !!SvSTATE (coro_sv)->flags & CF_READY;	1244	return !!(SvSTATE (coro_sv)->flags & CF_READY);
966	}	1245	}
967		1246
968	static void	1247	static void
969	prepare_schedule (struct transfer_args *ta)	1248	prepare_schedule (pTHX_ struct transfer_args *ta)
970	{	1249	{
971	SV prev, next;	1250	SV prev_sv, next_sv;
972		1251
973	for (;;)	1252	for (;;)
974	{	1253	{
975	LOCK;	1254	LOCK;
976	next = coro_deq (PRIO_MIN);	1255	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1256
		1257	/* nothing to schedule: call the idle handler */
		1258	if (expect_false (!next_sv))
		1259	{
		1260	dSP;
		1261	UNLOCK;
		1262
		1263	ENTER;
		1264	SAVETMPS;
		1265
		1266	PUSHMARK (SP);
		1267	PUTBACK;
		1268	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1269
		1270	FREETMPS;
		1271	LEAVE;
		1272	continue;
		1273	}
		1274
		1275	ta->next = SvSTATE (next_sv);
		1276
		1277	/* cannot transfer to destroyed coros, skip and look for next */
		1278	if (expect_false (ta->next->flags & CF_DESTROYED))
		1279	{
		1280	UNLOCK;
		1281	SvREFCNT_dec (next_sv);
		1282	/* coro_nready is already taken care of by destroy */
		1283	continue;
		1284	}
		1285
		1286	--coro_nready;
977	UNLOCK;	1287	UNLOCK;
978
979	if (next)
980	break;	1288	break;
981
982	{
983	dSP;
984
985	ENTER;
986	SAVETMPS;
987
988	PUSHMARK (SP);
989	PUTBACK;
990	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
991
992	FREETMPS;
993	LEAVE;
994	}	1289	}
995	}
996
997	prev = SvRV (coro_current);
998	SvRV_set (coro_current, next);
999		1290
1000	/* free this only after the transfer */	1291	/* free this only after the transfer */
1001	LOCK;	1292	prev_sv = SvRV (coro_current);
1002	free_coro_mortal ();
1003	UNLOCK;
1004	coro_mortal = prev;
1005
1006	assert (!SvROK(prev));//D
1007	assert (!SvROK(next));//D
1008
1009	ta->prev = SvSTATE (prev);	1293	ta->prev = SvSTATE (prev_sv);
1010	ta->next = SvSTATE (next);	1294	TRANSFER_CHECK (*ta);
1011
1012	assert (ta->next->flags & CF_READY);	1295	assert (ta->next->flags & CF_READY);
1013	ta->next->flags &= ~CF_READY;	1296	ta->next->flags &= ~CF_READY;
1014	}	1297	SvRV_set (coro_current, next_sv);
1015		1298
		1299	LOCK;
		1300	free_coro_mortal (aTHX);
		1301	coro_mortal = prev_sv;
		1302	UNLOCK;
		1303	}
		1304
1016	static void	1305	static void
1017	prepare_cede (struct transfer_args *ta)	1306	prepare_cede (pTHX_ struct transfer_args *ta)
1018	{	1307	{
1019	api_ready (coro_current);	1308	api_ready (coro_current);
1020
1021	prepare_schedule (ta);	1309	prepare_schedule (aTHX_ ta);
		1310	}
		1311
		1312	static int
		1313	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1314	{
		1315	if (coro_nready)
		1316	{
		1317	SV *prev = SvRV (coro_current);
		1318	prepare_schedule (aTHX_ ta);
		1319	api_ready (prev);
		1320	return 1;
		1321	}
		1322	else
		1323	return 0;
1022	}	1324	}
1023		1325
1024	static void	1326	static void
1025	api_schedule (void)	1327	api_schedule (void)
1026	{	1328	{
		1329	dTHX;
1027	struct transfer_args ta;	1330	struct transfer_args ta;
1028		1331
1029	prepare_schedule (&ta);	1332	prepare_schedule (aTHX_ &ta);
1030	TRANSFER (ta);	1333	TRANSFER (ta);
1031	}	1334	}
1032		1335
1033	static void	1336	static int
1034	api_cede (void)	1337	api_cede (void)
1035	{	1338	{
		1339	dTHX;
1036	struct transfer_args ta;	1340	struct transfer_args ta;
1037		1341
1038	prepare_cede (&ta);	1342	prepare_cede (aTHX_ &ta);
		1343
		1344	if (expect_true (ta.prev != ta.next))
		1345	{
1039	TRANSFER (ta);	1346	TRANSFER (ta);
		1347	return 1;
		1348	}
		1349	else
		1350	return 0;
1040	}	1351	}
1041		1352
		1353	static int
		1354	api_cede_notself (void)
		1355	{
		1356	dTHX;
		1357	struct transfer_args ta;
		1358
		1359	if (prepare_cede_notself (aTHX_ &ta))
		1360	{
		1361	TRANSFER (ta);
		1362	return 1;
		1363	}
		1364	else
		1365	return 0;
		1366	}
		1367
		1368	static void
		1369	api_trace (SV *coro_sv, int flags)
		1370	{
		1371	dTHX;
		1372	struct coro *coro = SvSTATE (coro_sv);
		1373
		1374	if (flags & CC_TRACE)
		1375	{
		1376	if (!coro->cctx)
		1377	coro->cctx = cctx_new ();
		1378	else if (!(coro->cctx->flags & CC_TRACE))
		1379	croak ("cannot enable tracing on coroutine with custom stack");
		1380
		1381	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1382	}
		1383	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1384	{
		1385	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1386
		1387	if (coro->flags & CF_RUNNING)
		1388	PL_runops = RUNOPS_DEFAULT;
		1389	else
		1390	coro->runops = RUNOPS_DEFAULT;
		1391	}
		1392	}
		1393
1042	MODULE = Coro::State PACKAGE = Coro::State	1394	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1043		1395
1044	PROTOTYPES: DISABLE	1396	PROTOTYPES: DISABLE
1045		1397
1046	BOOT:	1398	BOOT:
1047	{	1399	{
1048	#ifdef USE_ITHREADS	1400	#ifdef USE_ITHREADS
1049	MUTEX_INIT (&coro_mutex);	1401	MUTEX_INIT (&coro_mutex);
1050	#endif	1402	#endif
1051	BOOT_PAGESIZE;	1403	BOOT_PAGESIZE;
1052		1404
		1405	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1406	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1407
1053	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1408	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1054		1409
		1410	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1411	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1055	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));	1412	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
1056	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1057	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
1058	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
1059	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));	1413	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
1060		1414
1061	main_mainstack = PL_mainstack;	1415	main_mainstack = PL_mainstack;
		1416	main_top_env = PL_top_env;
		1417
		1418	while (main_top_env->je_prev)
		1419	main_top_env = main_top_env->je_prev;
1062		1420
1063	coroapi.ver = CORO_API_VERSION;	1421	coroapi.ver = CORO_API_VERSION;
1064	coroapi.transfer = api_transfer;	1422	coroapi.transfer = api_transfer;
1065		1423
1066	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1424	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1073	struct coro *coro;	1431	struct coro *coro;
1074	HV *hv;	1432	HV *hv;
1075	int i;	1433	int i;
1076		1434
1077	Newz (0, coro, 1, struct coro);	1435	Newz (0, coro, 1, struct coro);
1078	coro->args = newAV ();	1436	coro->args = newAV ();
1079	coro->save = CORO_SAVE_ALL;
1080	coro->flags = CF_NEW;	1437	coro->flags = CF_NEW;
1081		1438
		1439	if (coro_first) coro_first->prev = coro;
		1440	coro->next = coro_first;
		1441	coro_first = coro;
		1442
1082	hv = newHV ();	1443	coro->hv = hv = newHV ();
1083	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1444	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
1084	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1445	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1085		1446
		1447	av_extend (coro->args, items - 1);
1086	for (i = 1; i < items; i++)	1448	for (i = 1; i < items; i++)
1087	av_push (coro->args, newSVsv (ST (i)));	1449	av_push (coro->args, newSVsv (ST (i)));
1088	}	1450	}
1089	OUTPUT:	1451	OUTPUT:
1090	RETVAL	1452	RETVAL
1091		1453
1092	int	1454	# these not obviously related functions are all rolled into the same xs
1093	save (SV *coro, int new_save = -1)	1455	# function to increase chances that they all will call transfer with the same
1094	CODE:	1456	# stack offset
1095	RETVAL = api_save (coro, new_save);
1096	OUTPUT:
1097	RETVAL
1098
1099	void	1457	void
1100	_set_stacklevel (...)	1458	_set_stacklevel (...)
1101	ALIAS:	1459	ALIAS:
1102	Coro::State::transfer = 1	1460	Coro::State::transfer = 1
1103	Coro::schedule = 2	1461	Coro::schedule = 2
1104	Coro::cede = 3	1462	Coro::cede = 3
		1463	Coro::cede_notself = 4
1105	CODE:	1464	CODE:
1106	{	1465	{
1107	struct transfer_args ta;	1466	struct transfer_args ta;
1108		1467
1109	switch (ix)	1468	switch (ix)
…		…
1115		1474
1116	case 1:	1475	case 1:
1117	if (items != 2)	1476	if (items != 2)
1118	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);	1477	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1119		1478
1120	prepare_transfer (&ta, ST (0), ST (1));	1479	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1121	break;	1480	break;
1122		1481
1123	case 2:	1482	case 2:
1124	prepare_schedule (&ta);	1483	prepare_schedule (aTHX_ &ta);
1125	break;	1484	break;
1126		1485
1127	case 3:	1486	case 3:
1128	prepare_cede (&ta);	1487	prepare_cede (aTHX_ &ta);
		1488	break;
		1489
		1490	case 4:
		1491	if (!prepare_cede_notself (aTHX_ &ta))
		1492	XSRETURN_EMPTY;
		1493
1129	break;	1494	break;
1130	}	1495	}
1131		1496
		1497	BARRIER;
1132	TRANSFER (ta);	1498	TRANSFER (ta);
1133	}
1134		1499
1135	void	1500	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
1136	_clone_state_from (SV dst, SV src)	1501	XSRETURN_YES;
		1502	}
		1503
		1504	bool
		1505	_destroy (SV *coro_sv)
1137	CODE:	1506	CODE:
1138	{	1507	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1139	struct coro *coro_src = SvSTATE (src);	1508	OUTPUT:
1140		1509	RETVAL
1141	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1142
1143	++coro_src->refcnt;
1144	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1145	}
1146		1510
1147	void	1511	void
1148	_exit (code)	1512	_exit (code)
1149	int code	1513	int code
1150	PROTOTYPE: $	1514	PROTOTYPE: $
1151	CODE:	1515	CODE:
1152	_exit (code);	1516	_exit (code);
1153		1517
1154	int	1518	int
		1519	cctx_stacksize (int new_stacksize = 0)
		1520	CODE:
		1521	RETVAL = coro_stacksize;
		1522	if (new_stacksize)
		1523	coro_stacksize = new_stacksize;
		1524	OUTPUT:
		1525	RETVAL
		1526
		1527	int
1155	cctx_count ()	1528	cctx_count ()
1156	CODE:	1529	CODE:
1157	RETVAL = cctx_count;	1530	RETVAL = cctx_count;
1158	OUTPUT:	1531	OUTPUT:
1159	RETVAL	1532	RETVAL
…		…
1163	CODE:	1536	CODE:
1164	RETVAL = cctx_idle;	1537	RETVAL = cctx_idle;
1165	OUTPUT:	1538	OUTPUT:
1166	RETVAL	1539	RETVAL
1167		1540
		1541	void
		1542	list ()
		1543	PPCODE:
		1544	{
		1545	struct coro *coro;
		1546	for (coro = coro_first; coro; coro = coro->next)
		1547	if (coro->hv)
		1548	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1549	}
		1550
		1551	void
		1552	call (Coro::State coro, SV *coderef)
		1553	ALIAS:
		1554	eval = 1
		1555	CODE:
		1556	{
		1557	if (coro->mainstack)
		1558	{
		1559	struct coro temp;
		1560	Zero (&temp, 1, struct coro);
		1561
		1562	if (!(coro->flags & CF_RUNNING))
		1563	{
		1564	save_perl (aTHX_ &temp);
		1565	load_perl (aTHX_ coro);
		1566	}
		1567
		1568	{
		1569	dSP;
		1570	ENTER;
		1571	SAVETMPS;
		1572	PUSHMARK (SP);
		1573	PUTBACK;
		1574	if (ix)
		1575	eval_sv (coderef, 0);
		1576	else
		1577	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1578	SPAGAIN;
		1579	FREETMPS;
		1580	LEAVE;
		1581	PUTBACK;
		1582	}
		1583
		1584	if (!(coro->flags & CF_RUNNING))
		1585	{
		1586	save_perl (aTHX_ coro);
		1587	load_perl (aTHX_ &temp);
		1588	}
		1589	}
		1590	}
		1591
		1592	SV *
		1593	is_ready (Coro::State coro)
		1594	PROTOTYPE: $
		1595	ALIAS:
		1596	is_ready = CF_READY
		1597	is_running = CF_RUNNING
		1598	is_new = CF_NEW
		1599	is_destroyed = CF_DESTROYED
		1600	CODE:
		1601	RETVAL = boolSV (coro->flags & ix);
		1602	OUTPUT:
		1603	RETVAL
		1604
		1605	void
		1606	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1607
		1608	SV *
		1609	has_stack (Coro::State coro)
		1610	PROTOTYPE: $
		1611	CODE:
		1612	RETVAL = boolSV (!!coro->cctx);
		1613	OUTPUT:
		1614	RETVAL
		1615
		1616	int
		1617	is_traced (Coro::State coro)
		1618	PROTOTYPE: $
		1619	CODE:
		1620	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1621	OUTPUT:
		1622	RETVAL
		1623
		1624	IV
		1625	rss (Coro::State coro)
		1626	PROTOTYPE: $
		1627	ALIAS:
		1628	usecount = 1
		1629	CODE:
		1630	switch (ix)
		1631	{
		1632	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1633	case 1: RETVAL = coro->usecount; break;
		1634	}
		1635	OUTPUT:
		1636	RETVAL
		1637
		1638
1168	MODULE = Coro::State PACKAGE = Coro	1639	MODULE = Coro::State PACKAGE = Coro
1169		1640
1170	BOOT:	1641	BOOT:
1171	{	1642	{
1172	int i;	1643	int i;
		1644
		1645	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1646	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1647	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1648
		1649	coro_current = get_sv ("Coro::current", FALSE);
		1650	SvREADONLY_on (coro_current);
1173		1651
1174	coro_stash = gv_stashpv ("Coro", TRUE);	1652	coro_stash = gv_stashpv ("Coro", TRUE);
1175		1653
1176	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1654	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1177	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1655	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1178	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1656	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1179	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1657	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1180	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1658	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1181	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1659	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1182		1660
1183	coro_current = get_sv ("Coro::current", FALSE);
1184	SvREADONLY_on (coro_current);
1185
1186	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1661	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1187	coro_ready[i] = newAV ();	1662	coro_ready[i] = newAV ();
1188		1663
1189	{	1664	{
1190	SV *sv = perl_get_sv("Coro::API", 1);	1665	SV *sv = perl_get_sv("Coro::API", 1);
1191		1666
1192	coroapi.schedule = api_schedule;	1667	coroapi.schedule = api_schedule;
1193	coroapi.save = api_save;
1194	coroapi.cede = api_cede;	1668	coroapi.cede = api_cede;
		1669	coroapi.cede_notself = api_cede_notself;
1195	coroapi.ready = api_ready;	1670	coroapi.ready = api_ready;
1196	coroapi.is_ready = api_is_ready;	1671	coroapi.is_ready = api_is_ready;
1197	coroapi.nready = &coro_nready;	1672	coroapi.nready = &coro_nready;
1198	coroapi.current = coro_current;	1673	coroapi.current = coro_current;
1199		1674
1200	GCoroAPI = &coroapi;	1675	GCoroAPI = &coroapi;
1201	sv_setiv (sv, (IV)&coroapi);	1676	sv_setiv (sv, (IV)&coroapi);
1202	SvREADONLY_on (sv);	1677	SvREADONLY_on (sv);
1203	}	1678	}
…		…
1219	RETVAL = coro->prio;	1694	RETVAL = coro->prio;
1220		1695
1221	if (items > 1)	1696	if (items > 1)
1222	{	1697	{
1223	if (ix)	1698	if (ix)
1224	newprio += coro->prio;	1699	newprio = coro->prio - newprio;
1225		1700
1226	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1701	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1227	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1702	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1228		1703
1229	coro->prio = newprio;	1704	coro->prio = newprio;
1230	}	1705	}
1231	}	1706	}
		1707	OUTPUT:
		1708	RETVAL
1232		1709
1233	SV *	1710	SV *
1234	ready (SV *self)	1711	ready (SV *self)
1235	PROTOTYPE: $	1712	PROTOTYPE: $
1236	CODE:	1713	CODE:
1237	RETVAL = boolSV (api_ready (self));	1714	RETVAL = boolSV (api_ready (self));
1238	OUTPUT:	1715	OUTPUT:
1239	RETVAL	1716	RETVAL
1240		1717
1241	SV *
1242	is_ready (SV *self)
1243	PROTOTYPE: $
1244	CODE:
1245	RETVAL = boolSV (api_is_ready (self));
1246	OUTPUT:
1247	RETVAL
1248
1249	int	1718	int
1250	nready (...)	1719	nready (...)
1251	PROTOTYPE:	1720	PROTOTYPE:
1252	CODE:	1721	CODE:
1253	RETVAL = coro_nready;	1722	RETVAL = coro_nready;
1254	OUTPUT:	1723	OUTPUT:
1255	RETVAL	1724	RETVAL
1256		1725
		1726	# for async_pool speedup
		1727	void
		1728	_pool_1 (SV *cb)
		1729	CODE:
		1730	{
		1731	struct coro *coro = SvSTATE (coro_current);
		1732	HV hv = (HV )SvRV (coro_current);
		1733	AV *defav = GvAV (PL_defgv);
		1734	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1735	AV *invoke_av;
		1736	int i, len;
		1737
		1738	if (!invoke)
		1739	croak ("\3terminate\2\n");
		1740
		1741	SvREFCNT_dec (coro->saved_deffh);
		1742	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1743
		1744	hv_store (hv, "desc", sizeof ("desc") - 1,
		1745	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1746
		1747	invoke_av = (AV *)SvRV (invoke);
		1748	len = av_len (invoke_av);
		1749
		1750	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1751
		1752	if (len > 0)
		1753	{
		1754	av_fill (defav, len - 1);
		1755	for (i = 0; i < len; ++i)
		1756	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1757	}
		1758
		1759	SvREFCNT_dec (invoke);
		1760	}
		1761
		1762	void
		1763	_pool_2 (SV *cb)
		1764	CODE:
		1765	{
		1766	struct coro *coro = SvSTATE (coro_current);
		1767
		1768	sv_setsv (cb, &PL_sv_undef);
		1769
		1770	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1771	coro->saved_deffh = 0;
		1772
		1773	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1774	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1775	croak ("\3terminate\2\n");
		1776
		1777	av_clear (GvAV (PL_defgv));
		1778	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1779	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1780
		1781	coro->prio = 0;
		1782
		1783	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1784	api_trace (coro_current, 0);
		1785
		1786	av_push (av_async_pool, newSVsv (coro_current));
		1787	}
		1788
		1789
1257	MODULE = Coro::State PACKAGE = Coro::AIO	1790	MODULE = Coro::State PACKAGE = Coro::AIO
1258		1791
1259	SV *	1792	SV *
1260	_get_state ()	1793	_get_state ()
1261	CODE:	1794	CODE:

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Comparing Coro/Coro/State.xs (file contents): Revision 1.122 by root, Mon Dec 4 13:47:56 2006 UTC vs. Revision 1.194 by root, Sat Oct 6 00:08:04 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.122 by root, Mon Dec 4 13:47:56 2006 UTC vs.
Revision 1.194 by root, Sat Oct 6 00:08:04 2007 UTC