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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.108 by root, Mon Nov 27 18:15:47 2006 UTC vs.
Revision 1.192 by root, Fri Oct 5 21:51:40 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	#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>	11	#include <stdio.h>
41	#include <errno.h>	12	#include <errno.h>
42		13	#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		14
51	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
52	# include <unistd.h>	16	# include <unistd.h>
53	# include <sys/mman.h>	17	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
69	#else	33	#else
70	# define PAGESIZE 0	34	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
72	#endif	36	#endif
73		37
74	/* The next macro should declare a variable stacklevel that contains and approximation	38	#if CORO_USE_VALGRIND
75	* to the current C stack pointer. Its property is that it changes with each call	39	# include <valgrind/valgrind.h>
76	* 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. */
77	#define dSTACKLEVEL int stacklevel	103	#define dSTACKLEVEL volatile char stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	104	#define STACKLEVEL ((void *)&stacklevel)
79		105
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	106	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		107
82	#if __GNUC__ >= 3	108	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	109	# define attribute(x) __attribute__(x)
		110	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
84	#else	111	#else
85	# define attribute(x)	112	# define attribute(x)
		113	# define BARRIER
86	#endif	114	#endif
87		115
88	#define NOINLINE attribute ((noinline))	116	#define NOINLINE attribute ((noinline))
89		117
90	#include "CoroAPI.h"	118	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		119
94	#ifdef USE_ITHREADS	120	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	121	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	122	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	123	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	124	#else
99	# define LOCK (void)0	125	# define LOCK (void)0
100	# define UNLOCK (void)0	126	# define UNLOCK (void)0
101	#endif	127	#endif
102		128
		129	/* helper storage struct for Coro::AIO */
		130	struct io_state
		131	{
		132	int errorno;
		133	I32 laststype;
		134	int laststatval;
		135	Stat_t statcache;
		136	};
		137
		138	static size_t coro_stacksize = CORO_STACKSIZE;
103	static struct CoroAPI coroapi;	139	static struct CoroAPI coroapi;
104	static AV main_mainstack; / used to differentiate between $main and others */	140	static AV main_mainstack; / used to differentiate between $main and others */
		141	static JMPENV *main_top_env;
105	static HV coro_state_stash, coro_stash;	142	static HV coro_state_stash, coro_stash;
106	static SV coro_mortal; / will be freed after next transfer */	143	static SV coro_mortal; / will be freed after next transfer */
107		144
		145	static GV irsgv; / $/ */
		146	static GV stdoutgv; / STDOUT /
		147
		148	/* async_pool helper stuff */
		149	static SV *sv_pool_rss;
		150	static SV *sv_pool_size;
		151	static AV *av_async_pool;
		152
108	static struct coro_cctx *cctx_first;	153	static struct coro_cctx *cctx_first;
109	static int cctx_count, cctx_idle;	154	static int cctx_count, cctx_idle;
		155
		156	enum {
		157	CC_MAPPED = 0x01,
		158	CC_NOREUSE = 0x02, /* throw this away after tracing */
		159	CC_TRACE = 0x04,
		160	CC_TRACE_SUB = 0x08, /* trace sub calls */
		161	CC_TRACE_LINE = 0x10, /* trace each statement */
		162	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		163	};
110		164
111	/* this is a structure representing a c-level coroutine */	165	/* this is a structure representing a c-level coroutine */
112	typedef struct coro_cctx {	166	typedef struct coro_cctx {
113	struct coro_cctx *next;	167	struct coro_cctx *next;
114		168
115	/* the stack */	169	/* the stack */
116	void *sptr;	170	void *sptr;
117	long ssize; /* positive == mmap, otherwise malloc */	171	size_t ssize;
118		172
119	/* cpu state */	173	/* cpu state */
120	void idle_sp; / sp of top-level transfer/schedule/cede call */	174	void idle_sp; / sp of top-level transfer/schedule/cede call */
		175	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
121	JMPENV *top_env;	176	JMPENV *top_env;
122	coro_context cctx;	177	coro_context cctx;
123		178
124	#if USE_VALGRIND	179	#if CORO_USE_VALGRIND
125	int valgrind_id;	180	int valgrind_id;
126	#endif	181	#endif
		182	unsigned char flags;
127	} coro_cctx;	183	} coro_cctx;
		184
		185	enum {
		186	CF_RUNNING = 0x0001, /* coroutine is running */
		187	CF_READY = 0x0002, /* coroutine is ready */
		188	CF_NEW = 0x0004, /* has never been switched to */
		189	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		190	};
128		191
129	/* this is a structure representing a perl-level coroutine */	192	/* this is a structure representing a perl-level coroutine */
130	struct coro {	193	struct coro {
131	/* the c coroutine allocated to this perl coroutine, if any */	194	/* the c coroutine allocated to this perl coroutine, if any */
132	coro_cctx *cctx;	195	coro_cctx *cctx;
133		196
134	/* data associated with this coroutine (initial args) */	197	/* data associated with this coroutine (initial args) */
135	AV *args;	198	AV *args;
136	int refcnt;	199	int refcnt;
		200	int flags; /* CF_ flags */
137		201
138	/* optionally saved, might be zero */	202	/* optionally saved, might be zero */
139	AV *defav;	203	AV defav; / @_ */
140	SV *defsv;	204	SV defsv; / $_ */
141	SV *errsv;	205	SV errsv; / $@ */
		206	SV deffh; / default filehandle */
		207	SV irssv; / $/ */
		208	SV irssv_sv; / real $/ cache */
142		209
143	#define VAR(name,type) type name;	210	#define VAR(name,type) type name;
144	# include "state.h"	211	# include "state.h"
145	#undef VAR	212	#undef VAR
146		213
		214	/* statistics */
		215	int usecount; /* number of transfers to this coro */
		216
147	/* coro process data */	217	/* coro process data */
148	int prio;	218	int prio;
		219	//SV *throw;
		220
		221	/* async_pool */
		222	SV *saved_deffh;
		223
		224	/* linked list */
		225	struct coro next, prev;
		226	HV hv; / the perl hash associated with this coro, if any */
149	};	227	};
150		228
151	typedef struct coro *Coro__State;	229	typedef struct coro *Coro__State;
152	typedef struct coro *Coro__State_or_hashref;	230	typedef struct coro *Coro__State_or_hashref;
153		231
		232	/ Coro ******************************************************************/
		233
		234	#define PRIO_MAX 3
		235	#define PRIO_HIGH 1
		236	#define PRIO_NORMAL 0
		237	#define PRIO_LOW -1
		238	#define PRIO_IDLE -3
		239	#define PRIO_MIN -4
		240
		241	/* for Coro.pm */
		242	static SV *coro_current;
		243	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		244	static int coro_nready;
		245	static struct coro *coro_first;
		246
		247	/ lowlevel stuff ********************************************************/
		248
154	static AV *	249	static AV *
155	coro_clone_padlist (CV *cv)	250	coro_clone_padlist (pTHX_ CV *cv)
156	{	251	{
157	AV *padlist = CvPADLIST (cv);	252	AV *padlist = CvPADLIST (cv);
158	AV newpadlist, newpad;	253	AV newpadlist, newpad;
159		254
160	newpadlist = newAV ();	255	newpadlist = newAV ();
…		…
172		267
173	return newpadlist;	268	return newpadlist;
174	}	269	}
175		270
176	static void	271	static void
177	free_padlist (AV *padlist)	272	free_padlist (pTHX_ AV *padlist)
178	{	273	{
179	/* may be during global destruction */	274	/* may be during global destruction */
180	if (SvREFCNT (padlist))	275	if (SvREFCNT (padlist))
181	{	276	{
182	I32 i = AvFILLp (padlist);	277	I32 i = AvFILLp (padlist);
…		…
203	AV *padlist;	298	AV *padlist;
204	AV av = (AV )mg->mg_obj;	299	AV av = (AV )mg->mg_obj;
205		300
206	/* casting is fun. */	301	/* casting is fun. */
207	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	302	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
208	free_padlist (padlist);	303	free_padlist (aTHX_ padlist);
209		304
210	SvREFCNT_dec (av);	305	SvREFCNT_dec (av);
211		306
212	return 0;	307	return 0;
213	}	308	}
214		309
215	#define PERL_MAGIC_coro PERL_MAGIC_ext	310	#define PERL_MAGIC_coro PERL_MAGIC_ext
216		311
217	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	312	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
218		313
		314	#define CORO_MAGIC(cv) \
		315	SvMAGIC (cv) \
		316	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		317	? SvMAGIC (cv) \
		318	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		319	: 0
		320
		321	static struct coro *
		322	SvSTATE_ (pTHX_ SV *coro)
		323	{
		324	HV *stash;
		325	MAGIC *mg;
		326
		327	if (SvROK (coro))
		328	coro = SvRV (coro);
		329
		330	if (SvTYPE (coro) != SVt_PVHV)
		331	croak ("Coro::State object required");
		332
		333	stash = SvSTASH (coro);
		334	if (stash != coro_stash && stash != coro_state_stash)
		335	{
		336	/* very slow, but rare, check */
		337	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		338	croak ("Coro::State object required");
		339	}
		340
		341	mg = CORO_MAGIC (coro);
		342	return (struct coro *)mg->mg_ptr;
		343	}
		344
		345	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		346
219	/* the next two functions merely cache the padlists */	347	/* the next two functions merely cache the padlists */
220	static void	348	static void
221	get_padlist (CV *cv)	349	get_padlist (pTHX_ CV *cv)
222	{	350	{
223	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	351	MAGIC *mg = CORO_MAGIC (cv);
		352	AV *av;
224		353
225	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	354	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
226	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	355	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
227	else	356	else
228	{	357	{
229	#if 0	358	#if CORO_PREFER_PERL_FUNCTIONS
230	/* this is probably cleaner, but also slower? */	359	/* this is probably cleaner, but also slower? */
231	CV *cp = Perl_cv_clone (cv);	360	CV *cp = Perl_cv_clone (cv);
232	CvPADLIST (cv) = CvPADLIST (cp);	361	CvPADLIST (cv) = CvPADLIST (cp);
233	CvPADLIST (cp) = 0;	362	CvPADLIST (cp) = 0;
234	SvREFCNT_dec (cp);	363	SvREFCNT_dec (cp);
235	#else	364	#else
236	CvPADLIST (cv) = coro_clone_padlist (cv);	365	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
237	#endif	366	#endif
238	}	367	}
239	}	368	}
240		369
241	static void	370	static void
242	put_padlist (CV *cv)	371	put_padlist (pTHX_ CV *cv)
243	{	372	{
244	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	373	MAGIC *mg = CORO_MAGIC (cv);
		374	AV *av;
245		375
246	if (!mg)	376	if (!mg)
247	{	377	{
248	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	378	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
249	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	379	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
250	mg->mg_virtual = &vtbl_coro;	380	mg->mg_virtual = &vtbl_coro;
251	mg->mg_obj = (SV *)newAV ();	381	mg->mg_obj = (SV *)newAV ();
252	}	382	}
253		383
254	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	384	av = (AV *)mg->mg_obj;
255	}
256		385
257	#define SB do {	386	if (AvFILLp (av) >= AvMAX (av))
258	#define SE } while (0)	387	av_extend (av, AvMAX (av) + 1);
259		388
260	#define LOAD(state) load_state((state));	389	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
261	#define SAVE(state,flags) save_state((state),(flags));	390	}
262		391
263	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	392	/ load & save, init *****************************************************/
264		393
265	static void	394	static void
266	load_state(Coro__State c)	395	load_perl (pTHX_ Coro__State c)
267	{	396	{
268	#define VAR(name,type) PL_ ## name = c->name;	397	#define VAR(name,type) PL_ ## name = c->name;
269	# include "state.h"	398	# include "state.h"
270	#undef VAR	399	#undef VAR
271		400
272	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	401	GvSV (PL_defgv) = c->defsv;
273	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	402	GvAV (PL_defgv) = c->defav;
274	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	403	GvSV (PL_errgv) = c->errsv;
		404	GvSV (irsgv) = c->irssv_sv;
275		405
276	{	406	{
277	dSP;	407	dSP;
278	CV *cv;	408	CV *cv;
279		409
280	/* now do the ugly restore mess */	410	/* now do the ugly restore mess */
281	while ((cv = (CV *)POPs))	411	while ((cv = (CV *)POPs))
282	{	412	{
283	AV padlist = (AV )POPs;
284
285	if (padlist)
286	{
287	put_padlist (cv); /* mark this padlist as available */	413	put_padlist (aTHX_ cv); /* mark this padlist as available */
288	CvPADLIST(cv) = padlist;	414	CvDEPTH (cv) = PTR2IV (POPs);
289	}	415	CvPADLIST (cv) = (AV *)POPs;
290
291	++CvDEPTH(cv);
292	}	416	}
293		417
294	PUTBACK;	418	PUTBACK;
295	}	419	}
296	}	420	}
297		421
298	static void	422	static void
299	save_state(Coro__State c, int flags)	423	save_perl (pTHX_ Coro__State c)
300	{	424	{
301	{	425	{
302	dSP;	426	dSP;
303	I32 cxix = cxstack_ix;	427	I32 cxix = cxstack_ix;
304	PERL_CONTEXT *ccstk = cxstack;	428	PERL_CONTEXT *ccstk = cxstack;
…		…
307	/*	431	/*
308	* the worst thing you can imagine happens first - we have to save	432	* the worst thing you can imagine happens first - we have to save
309	* (and reinitialize) all cv's in the whole callchain :(	433	* (and reinitialize) all cv's in the whole callchain :(
310	*/	434	*/
311		435
312	PUSHs (Nullsv);	436	XPUSHs (Nullsv);
313	/* this loop was inspired by pp_caller */	437	/* this loop was inspired by pp_caller */
314	for (;;)	438	for (;;)
315	{	439	{
316	while (cxix >= 0)	440	while (cxix >= 0)
317	{	441	{
318	PERL_CONTEXT *cx = &ccstk[cxix--];	442	PERL_CONTEXT *cx = &ccstk[cxix--];
319		443
320	if (CxTYPE(cx) == CXt_SUB)	444	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
321	{	445	{
322	CV *cv = cx->blk_sub.cv;	446	CV *cv = cx->blk_sub.cv;
		447
323	if (CvDEPTH(cv))	448	if (CvDEPTH (cv))
324	{	449	{
325	EXTEND (SP, CvDEPTH(cv)*2);	450	EXTEND (SP, 3);
326
327	while (--CvDEPTH(cv))
328	{
329	/* this tells the restore code to increment CvDEPTH */
330	PUSHs (Nullsv);
331	PUSHs ((SV *)cv);
332	}
333
334	PUSHs ((SV *)CvPADLIST(cv));	451	PUSHs ((SV *)CvPADLIST (cv));
		452	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
335	PUSHs ((SV *)cv);	453	PUSHs ((SV *)cv);
336		454
		455	CvDEPTH (cv) = 0;
337	get_padlist (cv);	456	get_padlist (aTHX_ cv);
338	}	457	}
339	}	458	}
340	#ifdef CXt_FORMAT
341	else if (CxTYPE(cx) == CXt_FORMAT)
342	{
343	/* I never used formats, so how should I know how these are implemented? */
344	/* my bold guess is as a simple, plain sub... */
345	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
346	}
347	#endif
348	}	459	}
349		460
350	if (top_si->si_type == PERLSI_MAIN)	461	if (top_si->si_type == PERLSI_MAIN)
351	break;	462	break;
352		463
353	top_si = top_si->si_prev;	464	top_si = top_si->si_prev;
354	ccstk = top_si->si_cxstack;	465	ccstk = top_si->si_cxstack;
355	cxix = top_si->si_cxix;	466	cxix = top_si->si_cxix;
356	}	467	}
357		468
358	PUTBACK;	469	PUTBACK;
359	}	470	}
360		471
361	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	472	c->defav = GvAV (PL_defgv);
362	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	473	c->defsv = DEFSV;
363	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	474	c->errsv = ERRSV;
		475	c->irssv_sv = GvSV (irsgv);
364		476
365	#define VAR(name,type)c->name = PL_ ## name;	477	#define VAR(name,type)c->name = PL_ ## name;
366	# include "state.h"	478	# include "state.h"
367	#undef VAR	479	#undef VAR
368	}	480	}
…		…
371	* allocate various perl stacks. This is an exact copy	483	* allocate various perl stacks. This is an exact copy
372	* of perl.c:init_stacks, except that it uses less memory	484	* of perl.c:init_stacks, except that it uses less memory
373	* on the (sometimes correct) assumption that coroutines do	485	* on the (sometimes correct) assumption that coroutines do
374	* not usually need a lot of stackspace.	486	* not usually need a lot of stackspace.
375	*/	487	*/
		488	#if CORO_PREFER_PERL_FUNCTIONS
		489	# define coro_init_stacks init_stacks
		490	#else
376	static void	491	static void
377	coro_init_stacks ()	492	coro_init_stacks (pTHX)
378	{	493	{
379	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	494	PL_curstackinfo = new_stackinfo(64, 6);
380	PL_curstackinfo->si_type = PERLSI_MAIN;	495	PL_curstackinfo->si_type = PERLSI_MAIN;
381	PL_curstack = PL_curstackinfo->si_stack;	496	PL_curstack = PL_curstackinfo->si_stack;
382	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	497	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
383		498
384	PL_stack_base = AvARRAY(PL_curstack);	499	PL_stack_base = AvARRAY(PL_curstack);
385	PL_stack_sp = PL_stack_base;	500	PL_stack_sp = PL_stack_base;
386	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	501	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
387		502
388	New(50,PL_tmps_stack,96,SV*);	503	New(50,PL_tmps_stack,64,SV*);
389	PL_tmps_floor = -1;	504	PL_tmps_floor = -1;
390	PL_tmps_ix = -1;	505	PL_tmps_ix = -1;
391	PL_tmps_max = 96;	506	PL_tmps_max = 64;
392		507
393	New(54,PL_markstack,16,I32);	508	New(54,PL_markstack,16,I32);
394	PL_markstack_ptr = PL_markstack;	509	PL_markstack_ptr = PL_markstack;
395	PL_markstack_max = PL_markstack + 16;	510	PL_markstack_max = PL_markstack + 16;
396		511
…		…
400		515
401	New(54,PL_scopestack,16,I32);	516	New(54,PL_scopestack,16,I32);
402	PL_scopestack_ix = 0;	517	PL_scopestack_ix = 0;
403	PL_scopestack_max = 16;	518	PL_scopestack_max = 16;
404		519
405	New(54,PL_savestack,96,ANY);	520	New(54,PL_savestack,64,ANY);
406	PL_savestack_ix = 0;	521	PL_savestack_ix = 0;
407	PL_savestack_max = 96;	522	PL_savestack_max = 64;
408		523
409	#if !PERL_VERSION_ATLEAST (5,9,0)	524	#if !PERL_VERSION_ATLEAST (5,9,0)
410	New(54,PL_retstack,8,OP*);	525	New(54,PL_retstack,4,OP*);
411	PL_retstack_ix = 0;	526	PL_retstack_ix = 0;
412	PL_retstack_max = 8;	527	PL_retstack_max = 4;
413	#endif	528	#endif
414	}	529	}
		530	#endif
415		531
416	/*	532	/*
417	* destroy the stacks, the callchain etc...	533	* destroy the stacks, the callchain etc...
418	*/	534	*/
419	static void	535	static void
420	coro_destroy_stacks ()	536	coro_destroy_stacks (pTHX)
421	{	537	{
422	if (!IN_DESTRUCT)
423	{
424	/* is this ugly, I ask? */
425	LEAVE_SCOPE (0);
426
427	/* sure it is, but more important: is it correct?? :/ */
428	FREETMPS;
429
430	/POPSTACK_TO (PL_mainstack);//D//use/
431	}
432
433	while (PL_curstackinfo->si_next)	538	while (PL_curstackinfo->si_next)
434	PL_curstackinfo = PL_curstackinfo->si_next;	539	PL_curstackinfo = PL_curstackinfo->si_next;
435		540
436	while (PL_curstackinfo)	541	while (PL_curstackinfo)
437	{	542	{
438	PERL_SI *p = PL_curstackinfo->si_prev;	543	PERL_SI *p = PL_curstackinfo->si_prev;
439		544
440	{ /D//remove/
441	dSP;
442	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
443	PUTBACK; /* possibly superfluous */
444	}
445
446	if (!IN_DESTRUCT)	545	if (!IN_DESTRUCT)
447	{
448	dounwind (-1);/D//remove/
449	SvREFCNT_dec (PL_curstackinfo->si_stack);	546	SvREFCNT_dec (PL_curstackinfo->si_stack);
450	}
451		547
452	Safefree (PL_curstackinfo->si_cxstack);	548	Safefree (PL_curstackinfo->si_cxstack);
453	Safefree (PL_curstackinfo);	549	Safefree (PL_curstackinfo);
454	PL_curstackinfo = p;	550	PL_curstackinfo = p;
455	}	551	}
…		…
461	#if !PERL_VERSION_ATLEAST (5,9,0)	557	#if !PERL_VERSION_ATLEAST (5,9,0)
462	Safefree (PL_retstack);	558	Safefree (PL_retstack);
463	#endif	559	#endif
464	}	560	}
465		561
466	static void	562	static size_t
467	setup_coro (struct coro *coro)	563	coro_rss (pTHX_ struct coro *coro)
		564	{
		565	size_t rss = sizeof (*coro);
		566
		567	if (coro->mainstack)
		568	{
		569	if (coro->flags & CF_RUNNING)
		570	{
		571	#define VAR(name,type)coro->name = PL_ ## name;
		572	# include "state.h"
		573	#undef VAR
		574	}
		575
		576	rss += sizeof (coro->curstackinfo);
		577	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		578	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		579	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		580	rss += coro->tmps_max * sizeof (SV *);
		581	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		582	rss += coro->scopestack_max * sizeof (I32);
		583	rss += coro->savestack_max * sizeof (ANY);
		584
		585	#if !PERL_VERSION_ATLEAST (5,9,0)
		586	rss += coro->retstack_max * sizeof (OP *);
		587	#endif
		588	}
		589
		590	return rss;
		591	}
		592
		593	/ coroutine stack handling **********************************************/
		594
		595	static void
		596	coro_setup (pTHX_ struct coro *coro)
468	{	597	{
469	/*	598	/*
470	* emulate part of the perl startup here.	599	* emulate part of the perl startup here.
471	*/	600	*/
472
473	coro_init_stacks ();	601	coro_init_stacks (aTHX);
474		602
		603	PL_runops = RUNOPS_DEFAULT;
		604	PL_curcop = &PL_compiling;
		605	PL_in_eval = EVAL_NULL;
475	PL_curcop = 0;	606	PL_comppad = 0;
476	PL_in_eval = 0;
477	PL_curpm = 0;	607	PL_curpm = 0;
		608	PL_localizing = 0;
		609	PL_dirty = 0;
		610	PL_restartop = 0;
		611
		612	GvSV (PL_defgv) = newSV (0);
		613	GvAV (PL_defgv) = coro->args; coro->args = 0;
		614	GvSV (PL_errgv) = newSV (0);
		615	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		616	PL_rs = newSVsv (GvSV (irsgv));
		617	PL_defoutgv = SvREFCNT_inc (stdoutgv);
		618
		619	ENTER; /* necessary e.g. for dounwind */
478		620
479	{	621	{
480	dSP;	622	dSP;
481	LOGOP myop;	623	LOGOP myop;
482		624
483	/* I have no idea why this is needed, but it is */
484	PUSHMARK (SP);
485
486	SvREFCNT_dec (GvAV (PL_defgv));
487	GvAV (PL_defgv) = coro->args; coro->args = 0;
488
489	Zero (&myop, 1, LOGOP);	625	Zero (&myop, 1, LOGOP);
490	myop.op_next = Nullop;	626	myop.op_next = Nullop;
491	myop.op_flags = OPf_WANT_VOID;	627	myop.op_flags = OPf_WANT_VOID;
492		628
		629	PUSHMARK (SP);
		630	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		631	PUTBACK;
493	PL_op = (OP *)&myop;	632	PL_op = (OP *)&myop;
494
495	PUSHMARK (SP);
496	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
497	PUTBACK;
498	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	633	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
499	SPAGAIN;	634	SPAGAIN;
500
501	ENTER; /* necessary e.g. for dounwind */
502	}	635	}
503	}	636	}
504		637
505	static void	638	static void
		639	coro_destroy (pTHX_ struct coro *coro)
		640	{
		641	if (!IN_DESTRUCT)
		642	{
		643	/* restore all saved variables and stuff */
		644	LEAVE_SCOPE (0);
		645	assert (PL_tmps_floor == -1);
		646
		647	/* free all temporaries */
		648	FREETMPS;
		649	assert (PL_tmps_ix == -1);
		650
		651	/* unwind all extra stacks */
		652	POPSTACK_TO (PL_mainstack);
		653
		654	/* unwind main stack */
		655	dounwind (-1);
		656	}
		657
		658	SvREFCNT_dec (GvSV (PL_defgv));
		659	SvREFCNT_dec (GvAV (PL_defgv));
		660	SvREFCNT_dec (GvSV (PL_errgv));
		661	SvREFCNT_dec (PL_defoutgv);
		662	SvREFCNT_dec (PL_rs);
		663	SvREFCNT_dec (GvSV (irsgv));
		664
		665	SvREFCNT_dec (coro->saved_deffh);
		666	//SvREFCNT_dec (coro->throw);
		667
		668	coro_destroy_stacks (aTHX);
		669	}
		670
		671	static void
506	free_coro_mortal ()	672	free_coro_mortal (pTHX)
507	{	673	{
508	if (coro_mortal)	674	if (coro_mortal)
509	{	675	{
510	SvREFCNT_dec (coro_mortal);	676	SvREFCNT_dec (coro_mortal);
511	coro_mortal = 0;	677	coro_mortal = 0;
512	}	678	}
513	}	679	}
514		680
		681	static int
		682	runops_trace (pTHX)
		683	{
		684	COP *oldcop = 0;
		685	int oldcxix = -2;
		686	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		687	coro_cctx *cctx = coro->cctx;
		688
		689	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		690	{
		691	PERL_ASYNC_CHECK ();
		692
		693	if (cctx->flags & CC_TRACE_ALL)
		694	{
		695	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		696	{
		697	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		698	SV bot, top;
		699	AV av = newAV (); / return values */
		700	SV **cb;
		701	dSP;
		702
		703	GV *gv = CvGV (cx->blk_sub.cv);
		704	SV *fullname = sv_2mortal (newSV (0));
		705	if (isGV (gv))
		706	gv_efullname3 (fullname, gv, 0);
		707
		708	bot = PL_stack_base + cx->blk_oldsp + 1;
		709	top = cx->blk_gimme == G_ARRAY ? SP + 1
		710	: cx->blk_gimme == G_SCALAR ? bot + 1
		711	: bot;
		712
		713	while (bot < top)
		714	av_push (av, SvREFCNT_inc (*bot++));
		715
		716	PL_runops = RUNOPS_DEFAULT;
		717	ENTER;
		718	SAVETMPS;
		719	EXTEND (SP, 3);
		720	PUSHMARK (SP);
		721	PUSHs (&PL_sv_no);
		722	PUSHs (fullname);
		723	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		724	PUTBACK;
		725	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		726	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		727	SPAGAIN;
		728	FREETMPS;
		729	LEAVE;
		730	PL_runops = runops_trace;
		731	}
		732
		733	if (oldcop != PL_curcop)
		734	{
		735	oldcop = PL_curcop;
		736
		737	if (PL_curcop != &PL_compiling)
		738	{
		739	SV **cb;
		740
		741	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		742	{
		743	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		744
		745	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		746	{
		747	runops_proc_t old_runops = PL_runops;
		748	dSP;
		749	GV *gv = CvGV (cx->blk_sub.cv);
		750	SV *fullname = sv_2mortal (newSV (0));
		751
		752	if (isGV (gv))
		753	gv_efullname3 (fullname, gv, 0);
		754
		755	PL_runops = RUNOPS_DEFAULT;
		756	ENTER;
		757	SAVETMPS;
		758	EXTEND (SP, 3);
		759	PUSHMARK (SP);
		760	PUSHs (&PL_sv_yes);
		761	PUSHs (fullname);
		762	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		763	PUTBACK;
		764	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		765	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		766	SPAGAIN;
		767	FREETMPS;
		768	LEAVE;
		769	PL_runops = runops_trace;
		770	}
		771
		772	oldcxix = cxstack_ix;
		773	}
		774
		775	if (cctx->flags & CC_TRACE_LINE)
		776	{
		777	dSP;
		778
		779	PL_runops = RUNOPS_DEFAULT;
		780	ENTER;
		781	SAVETMPS;
		782	EXTEND (SP, 3);
		783	PL_runops = RUNOPS_DEFAULT;
		784	PUSHMARK (SP);
		785	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		786	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		787	PUTBACK;
		788	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		789	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		790	SPAGAIN;
		791	FREETMPS;
		792	LEAVE;
		793	PL_runops = runops_trace;
		794	}
		795	}
		796	}
		797	}
		798	}
		799
		800	TAINT_NOT;
		801	return 0;
		802	}
		803
		804	/* inject a fake call to Coro::State::_cctx_init into the execution */
		805	/* _cctx_init should be careful, as it could be called at almost any time */
		806	/* during execution of a perl program */
515	static void NOINLINE	807	static void NOINLINE
516	prepare_cctx (coro_cctx *cctx)	808	prepare_cctx (pTHX_ coro_cctx *cctx)
517	{	809	{
518	dSP;	810	dSP;
519	LOGOP myop;	811	LOGOP myop;
520		812
		813	PL_top_env = &PL_start_env;
		814
		815	if (cctx->flags & CC_TRACE)
		816	PL_runops = runops_trace;
		817
521	Zero (&myop, 1, LOGOP);	818	Zero (&myop, 1, LOGOP);
522	myop.op_next = PL_op;	819	myop.op_next = PL_op;
523	myop.op_flags = OPf_WANT_VOID;	820	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
524
525	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
526		821
527	PUSHMARK (SP);	822	PUSHMARK (SP);
		823	EXTEND (SP, 2);
		824	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
528	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));	825	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
529	PUTBACK;	826	PUTBACK;
		827	PL_op = (OP *)&myop;
530	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	828	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
531	SPAGAIN;	829	SPAGAIN;
532	}	830	}
533		831
		832	/*
		833	* this is a _very_ stripped down perl interpreter ;)
		834	*/
534	static void	835	static void
535	coro_run (void *arg)	836	coro_run (void *arg)
536	{	837	{
		838	dTHX;
		839
537	/* coro_run is the alternative epilogue of transfer() */	840	/* coro_run is the alternative tail of transfer(), so unlock here. */
538	UNLOCK;	841	UNLOCK;
539		842
		843	/* we now skip the entersub that lead to transfer() */
		844	PL_op = PL_op->op_next;
		845
		846	/* inject a fake subroutine call to cctx_init */
		847	prepare_cctx (aTHX_ (coro_cctx *)arg);
		848
		849	/* somebody or something will hit me for both perl_run and PL_restartop */
		850	PL_restartop = PL_op;
		851	perl_run (PL_curinterp);
		852
540	/*	853	/*
541	* this is a _very_ stripped down perl interpreter ;)	854	* If perl-run returns we assume exit() was being called or the coro
		855	* fell off the end, which seems to be the only valid (non-bug)
		856	* reason for perl_run to return. We try to exit by jumping to the
		857	* bootstrap-time "top" top_env, as we cannot restore the "main"
		858	* coroutine as Coro has no such concept
542	*/	859	*/
543	PL_top_env = &PL_start_env;	860	PL_top_env = main_top_env;
544		861	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
545	/* inject call to cctx_init */
546	prepare_cctx ((coro_cctx *)arg);
547
548	/* somebody will hit me for both perl_run and PL_restartop */
549	perl_run (PL_curinterp);
550
551	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
552	abort ();
553	}	862	}
554		863
555	static coro_cctx *	864	static coro_cctx *
556	cctx_new ()	865	cctx_new ()
557	{	866	{
558	coro_cctx *cctx;	867	coro_cctx *cctx;
		868	void *stack_start;
		869	size_t stack_size;
559		870
560	++cctx_count;	871	++cctx_count;
561		872
562	New (0, cctx, 1, coro_cctx);	873	Newz (0, cctx, 1, coro_cctx);
563		874
564	#if HAVE_MMAP	875	#if HAVE_MMAP
565		876
566	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	877	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
567	/* mmap suppsedly does allocate-on-write for us */	878	/* mmap supposedly does allocate-on-write for us */
568	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	879	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
569		880
570	if (cctx->sptr == (void *)-1)	881	if (cctx->sptr != (void *)-1)
571	{
572	perror ("FATAL: unable to mmap stack for coroutine");
573	_exit (EXIT_FAILURE);
574	}	882	{
575
576	# if STACKGUARD	883	# if CORO_STACKGUARD
577	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	884	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
578	# endif	885	# endif
		886	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		887	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		888	cctx->flags \|= CC_MAPPED;
		889	}
		890	else
		891	#endif
		892	{
		893	cctx->ssize = coro_stacksize * (long)sizeof (long);
		894	New (0, cctx->sptr, coro_stacksize, long);
579		895
580	#else
581
582	cctx->ssize = STACKSIZE * (long)sizeof (long);
583	New (0, cctx->sptr, STACKSIZE, long);
584
585	if (!cctx->sptr)	896	if (!cctx->sptr)
586	{	897	{
587	perror ("FATAL: unable to malloc stack for coroutine");	898	perror ("FATAL: unable to allocate stack for coroutine");
588	_exit (EXIT_FAILURE);	899	_exit (EXIT_FAILURE);
589	}	900	}
590		901
591	#endif	902	stack_start = cctx->sptr;
		903	stack_size = cctx->ssize;
		904	}
592		905
593	#if USE_VALGRIND	906	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
594	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
595	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
596	cctx->ssize + (char *)cctx->sptr
597	);
598	#endif
599
600	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	907	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
601		908
602	return cctx;	909	return cctx;
603	}	910	}
604		911
605	static void	912	static void
606	cctx_free (coro_cctx *cctx)	913	cctx_destroy (coro_cctx *cctx)
607	{	914	{
608	if (!cctx)	915	if (!cctx)
609	return;	916	return;
610		917
611	--cctx_count;	918	--cctx_count;
612		919
613	#if USE_VALGRIND	920	#if CORO_USE_VALGRIND
614	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	921	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
615	#endif	922	#endif
616		923
617	#if HAVE_MMAP	924	#if HAVE_MMAP
		925	if (cctx->flags & CC_MAPPED)
618	munmap (cctx->sptr, cctx->ssize);	926	munmap (cctx->sptr, cctx->ssize);
619	#else	927	else
		928	#endif
620	Safefree (cctx->sptr);	929	Safefree (cctx->sptr);
621	#endif
622		930
623	Safefree (cctx);	931	Safefree (cctx);
624	}	932	}
625		933
626	static coro_cctx *	934	static coro_cctx *
627	cctx_get ()	935	cctx_get (pTHX)
628	{	936	{
629	coro_cctx *cctx;
630
631	if (cctx_first)	937	while (cctx_first)
632	{	938	{
		939	coro_cctx *cctx = cctx_first;
		940	cctx_first = cctx->next;
633	--cctx_idle;	941	--cctx_idle;
634	cctx = cctx_first;	942
635	cctx_first = cctx->next;	943	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
636	}	944	return cctx;
637	else	945
638	{	946	cctx_destroy (cctx);
639	cctx = cctx_new ();
640	PL_op = PL_op->op_next;
641	}	947	}
642		948
643	return cctx;	949	return cctx_new ();
644	}	950	}
645		951
646	static void	952	static void
647	cctx_put (coro_cctx *cctx)	953	cctx_put (coro_cctx *cctx)
648	{	954	{
		955	/* free another cctx if overlimit */
		956	if (cctx_idle >= MAX_IDLE_CCTX)
		957	{
		958	coro_cctx *first = cctx_first;
		959	cctx_first = first->next;
		960	--cctx_idle;
		961
		962	cctx_destroy (first);
		963	}
		964
649	++cctx_idle;	965	++cctx_idle;
650	cctx->next = cctx_first;	966	cctx->next = cctx_first;
651	cctx_first = cctx;	967	cctx_first = cctx;
652	}	968	}
653		969
654	/* never call directly, always through the coro_state_transfer global variable */	970	/ coroutine switching ***************************************************/
		971
655	static void NOINLINE	972	static void NOINLINE
		973	transfer_check (pTHX_ struct coro prev, struct coro next)
		974	{
		975	if (prev != next)
		976	{
		977	if (!(prev->flags & (CF_RUNNING \| CF_NEW)))
		978	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		979
		980	if (next->flags & CF_RUNNING)
		981	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		982
		983	if (next->flags & CF_DESTROYED)
		984	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		985
		986	if (PL_lex_state != LEX_NOTPARSING)
		987	croak ("Coro::State::transfer called while parsing, but this is not supported");
		988	}
		989	}
		990
		991	/* always use the TRANSFER macro */
		992	static void NOINLINE
656	transfer (struct coro prev, struct coro next, int flags)	993	transfer (pTHX_ struct coro prev, struct coro next)
657	{	994	{
658	dSTACKLEVEL;	995	dSTACKLEVEL;
659		996
660	/* sometimes transfer is only called to set idle_sp */	997	/* sometimes transfer is only called to set idle_sp */
661	if (flags == TRANSFER_SET_STACKLEVEL)	998	if (!next)
		999	{
662	((coro_cctx *)prev)->idle_sp = STACKLEVEL;	1000	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1001	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		1002	}
663	else if (prev != next)	1003	else if (prev != next)
664	{	1004	{
665	coro_cctx *prev__cctx;	1005	coro_cctx *prev__cctx;
666		1006
		1007	if (prev->flags & CF_NEW)
		1008	{
		1009	/* create a new empty context */
		1010	Newz (0, prev->cctx, 1, coro_cctx);
		1011	prev->flags &= ~CF_NEW;
		1012	prev->flags \|= CF_RUNNING;
		1013	}
		1014
		1015	prev->flags &= ~CF_RUNNING;
		1016	next->flags \|= CF_RUNNING;
		1017
667	LOCK;	1018	LOCK;
668		1019
669	if (next->mainstack)	1020	if (next->flags & CF_NEW)
670	{	1021	{
671	/* coroutine already started */	1022	/* need to start coroutine */
672	SAVE (prev, flags);	1023	next->flags &= ~CF_NEW;
673	LOAD (next);	1024	/* first get rid of the old state */
		1025	save_perl (aTHX_ prev);
		1026	/* setup coroutine call */
		1027	coro_setup (aTHX_ next);
674	}	1028	}
675	else	1029	else
676	{	1030	{
677	/* need to start coroutine */	1031	/* coroutine already started */
678	/* first get rid of the old state */	1032	save_perl (aTHX_ prev);
679	SAVE (prev, -1);	1033	load_perl (aTHX_ next);
680	/* setup coroutine call */
681	setup_coro (next);
682	/* need a stack */
683	next->cctx = 0;
684	}	1034	}
685		1035
686	if (!prev->cctx)
687	/* create a new empty context */
688	Newz (0, prev->cctx, 1, coro_cctx);
689
690	prev__cctx = prev->cctx;	1036	prev__cctx = prev->cctx;
691		1037
692	/* possibly "free" the cctx */	1038	/* possibly "free" the cctx */
693	if (prev__cctx->idle_sp == STACKLEVEL)	1039	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
694	{	1040	{
		1041	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1042	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1043
		1044	prev->cctx = 0;
		1045
695	cctx_put (prev__cctx);	1046	cctx_put (prev__cctx);
696	prev->cctx = 0;
697	}	1047	}
698		1048
		1049	++next->usecount;
		1050
699	if (!next->cctx)	1051	if (!next->cctx)
700	next->cctx = cctx_get ();	1052	next->cctx = cctx_get (aTHX);
701		1053
702	if (prev__cctx != next->cctx)	1054	if (prev__cctx != next->cctx)
703	{	1055	{
704	prev__cctx->top_env = PL_top_env;	1056	prev__cctx->top_env = PL_top_env;
705	PL_top_env = next->cctx->top_env;	1057	PL_top_env = next->cctx->top_env;
706	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	1058	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
707	}	1059	}
708		1060
709	free_coro_mortal ();	1061	free_coro_mortal (aTHX);
710
711	UNLOCK;	1062	UNLOCK;
712	}	1063	}
713	}	1064	}
714		1065
715	struct transfer_args	1066	struct transfer_args
716	{	1067	{
717	struct coro prev, next;	1068	struct coro prev, next;
718	int flags;
719	};	1069	};
720		1070
721	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	1071	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1072	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
722		1073
		1074	/ high level stuff ******************************************************/
		1075
723	static void	1076	static int
724	coro_state_destroy (struct coro *coro)	1077	coro_state_destroy (pTHX_ struct coro *coro)
725	{	1078	{
726	if (coro->refcnt--)	1079	if (coro->flags & CF_DESTROYED)
727	return;	1080	return 0;
		1081
		1082	coro->flags \|= CF_DESTROYED;
		1083
		1084	if (coro->flags & CF_READY)
		1085	{
		1086	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1087	/* alternative: look through all ready queues and remove the coro */
		1088	LOCK;
		1089	--coro_nready;
		1090	UNLOCK;
		1091	}
		1092	else
		1093	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
728		1094
729	if (coro->mainstack && coro->mainstack != main_mainstack)	1095	if (coro->mainstack && coro->mainstack != main_mainstack)
730	{	1096	{
731	struct coro temp;	1097	struct coro temp;
732		1098
733	SAVE ((&temp), TRANSFER_SAVE_ALL);	1099	if (coro->flags & CF_RUNNING)
734	LOAD (coro);	1100	croak ("FATAL: tried to destroy currently running coroutine");
735		1101
736	coro_destroy_stacks ();	1102	save_perl (aTHX_ &temp);
		1103	load_perl (aTHX_ coro);
737		1104
		1105	coro_destroy (aTHX_ coro);
		1106
738	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1107	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
739		1108
740	coro->mainstack = 0;	1109	coro->mainstack = 0;
741	}	1110	}
742		1111
743	cctx_free (coro->cctx);	1112	cctx_destroy (coro->cctx);
744	SvREFCNT_dec (coro->args);	1113	SvREFCNT_dec (coro->args);
745	Safefree (coro);	1114
		1115	if (coro->next) coro->next->prev = coro->prev;
		1116	if (coro->prev) coro->prev->next = coro->next;
		1117	if (coro == coro_first) coro_first = coro->next;
		1118
		1119	return 1;
746	}	1120	}
747		1121
748	static int	1122	static int
749	coro_state_clear (pTHX_ SV sv, MAGIC mg)	1123	coro_state_free (pTHX_ SV sv, MAGIC mg)
750	{	1124	{
751	struct coro coro = (struct coro )mg->mg_ptr;	1125	struct coro coro = (struct coro )mg->mg_ptr;
752	mg->mg_ptr = 0;	1126	mg->mg_ptr = 0;
753		1127
		1128	coro->hv = 0;
		1129
		1130	if (--coro->refcnt < 0)
		1131	{
754	coro_state_destroy (coro);	1132	coro_state_destroy (aTHX_ coro);
		1133	Safefree (coro);
		1134	}
755		1135
756	return 0;	1136	return 0;
757	}	1137	}
758		1138
759	static int	1139	static int
…		…
766	return 0;	1146	return 0;
767	}	1147	}
768		1148
769	static MGVTBL coro_state_vtbl = {	1149	static MGVTBL coro_state_vtbl = {
770	0, 0, 0, 0,	1150	0, 0, 0, 0,
771	coro_state_clear,	1151	coro_state_free,
772	0,	1152	0,
773	#ifdef MGf_DUP	1153	#ifdef MGf_DUP
774	coro_state_dup,	1154	coro_state_dup,
775	#else	1155	#else
776	# define MGf_DUP 0	1156	# define MGf_DUP 0
777	#endif	1157	#endif
778	};	1158	};
779		1159
780	static struct coro *
781	SvSTATE (SV *coro)
782	{
783	HV *stash;
784	MAGIC *mg;
785
786	if (SvROK (coro))
787	coro = SvRV (coro);
788
789	stash = SvSTASH (coro);
790	if (stash != coro_stash && stash != coro_state_stash)
791	{
792	/* very slow, but rare, check */
793	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
794	croak ("Coro::State object required");
795	}
796
797	mg = SvMAGIC (coro);
798	assert (mg->mg_type == PERL_MAGIC_ext);
799	return (struct coro *)mg->mg_ptr;
800	}
801
802	static void	1160	static void
803	prepare_transfer (struct transfer_args ta, SV prev, SV *next, int flags)	1161	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
804	{	1162	{
805	ta->prev = SvSTATE (prev);	1163	ta->prev = SvSTATE (prev_sv);
806	ta->next = SvSTATE (next);	1164	ta->next = SvSTATE (next_sv);
807	ta->flags = flags;	1165	TRANSFER_CHECK (*ta);
808	}	1166	}
809		1167
810	static void	1168	static void
811	api_transfer (SV prev, SV next, int flags)	1169	api_transfer (SV prev_sv, SV next_sv)
812	{	1170	{
813	dTHX;	1171	dTHX;
814	struct transfer_args ta;	1172	struct transfer_args ta;
815		1173
816	prepare_transfer (&ta, prev, next, flags);	1174	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
817	TRANSFER (ta);	1175	TRANSFER (ta);
818	}	1176	}
819		1177
820	/ Coro ******************************************************************/	1178	/ Coro ******************************************************************/
821		1179
822	#define PRIO_MAX 3
823	#define PRIO_HIGH 1
824	#define PRIO_NORMAL 0
825	#define PRIO_LOW -1
826	#define PRIO_IDLE -3
827	#define PRIO_MIN -4
828
829	/* for Coro.pm */
830	static GV coro_current, coro_idle;
831	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
832	static int coro_nready;
833
834	static void	1180	static void
835	coro_enq (SV *sv)	1181	coro_enq (pTHX_ SV *coro_sv)
836	{	1182	{
837	int prio;
838
839	if (SvTYPE (sv) != SVt_PVHV)
840	croak ("Coro::ready tried to enqueue something that is not a coroutine");
841
842	prio = SvSTATE (sv)->prio;
843
844	av_push (coro_ready [prio - PRIO_MIN], sv);	1183	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
845	coro_nready++;
846	}	1184	}
847		1185
848	static SV *	1186	static SV *
849	coro_deq (int min_prio)	1187	coro_deq (pTHX_ int min_prio)
850	{	1188	{
851	int prio = PRIO_MAX - PRIO_MIN;	1189	int prio = PRIO_MAX - PRIO_MIN;
852		1190
853	min_prio -= PRIO_MIN;	1191	min_prio -= PRIO_MIN;
854	if (min_prio < 0)	1192	if (min_prio < 0)
855	min_prio = 0;	1193	min_prio = 0;
856		1194
857	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1195	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
858	if (AvFILLp (coro_ready [prio]) >= 0)	1196	if (AvFILLp (coro_ready [prio]) >= 0)
859	{
860	coro_nready--;
861	return av_shift (coro_ready [prio]);	1197	return av_shift (coro_ready [prio]);
862	}
863		1198
864	return 0;	1199	return 0;
865	}	1200	}
866		1201
867	static void	1202	static int
868	api_ready (SV *coro)	1203	api_ready (SV *coro_sv)
869	{	1204	{
870	dTHX;	1205	dTHX;
		1206	struct coro *coro;
871		1207
872	if (SvROK (coro))	1208	if (SvROK (coro_sv))
873	coro = SvRV (coro);	1209	coro_sv = SvRV (coro_sv);
		1210
		1211	coro = SvSTATE (coro_sv);
		1212
		1213	if (coro->flags & CF_READY)
		1214	return 0;
		1215
		1216	coro->flags \|= CF_READY;
874		1217
875	LOCK;	1218	LOCK;
876	coro_enq (SvREFCNT_inc (coro));	1219	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1220	++coro_nready;
877	UNLOCK;	1221	UNLOCK;
878	}
879		1222
		1223	return 1;
		1224	}
		1225
880	static void	1226	static int
		1227	api_is_ready (SV *coro_sv)
		1228	{
		1229	dTHX;
		1230	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1231	}
		1232
		1233	static void
881	prepare_schedule (struct transfer_args *ta)	1234	prepare_schedule (pTHX_ struct transfer_args *ta)
882	{	1235	{
883	SV current, prev, *next;	1236	SV prev_sv, next_sv;
884
885	current = GvSV (coro_current);
886		1237
887	for (;;)	1238	for (;;)
888	{	1239	{
889	LOCK;	1240	LOCK;
890	next = coro_deq (PRIO_MIN);	1241	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1242
		1243	/* nothing to schedule: call the idle handler */
		1244	if (!next_sv)
		1245	{
		1246	dSP;
		1247	UNLOCK;
		1248
		1249	ENTER;
		1250	SAVETMPS;
		1251
		1252	PUSHMARK (SP);
		1253	PUTBACK;
		1254	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1255
		1256	FREETMPS;
		1257	LEAVE;
		1258	continue;
		1259	}
		1260
		1261	ta->next = SvSTATE (next_sv);
		1262
		1263	/* cannot transfer to destroyed coros, skip and look for next */
		1264	if (ta->next->flags & CF_DESTROYED)
		1265	{
		1266	UNLOCK;
		1267	SvREFCNT_dec (next_sv);
		1268	/* coro_nready is already taken care of by destroy */
		1269	continue;
		1270	}
		1271
		1272	--coro_nready;
891	UNLOCK;	1273	UNLOCK;
892
893	if (next)
894	break;	1274	break;
895
896	{
897	dSP;
898
899	ENTER;
900	SAVETMPS;
901
902	PUSHMARK (SP);
903	PUTBACK;
904	call_sv (GvSV (coro_idle), G_DISCARD);
905
906	FREETMPS;
907	LEAVE;
908	}	1275	}
909	}
910
911	prev = SvRV (current);
912	SvRV (current) = next;
913		1276
914	/* free this only after the transfer */	1277	/* free this only after the transfer */
		1278	prev_sv = SvRV (coro_current);
		1279	ta->prev = SvSTATE (prev_sv);
		1280	TRANSFER_CHECK (*ta);
		1281	assert (ta->next->flags & CF_READY);
		1282	ta->next->flags &= ~CF_READY;
		1283	SvRV_set (coro_current, next_sv);
		1284
915	LOCK;	1285	LOCK;
916	free_coro_mortal ();	1286	free_coro_mortal (aTHX);
		1287	coro_mortal = prev_sv;
917	UNLOCK;	1288	UNLOCK;
918	coro_mortal = prev;
919
920	ta->prev = SvSTATE (prev);
921	ta->next = SvSTATE (next);
922	ta->flags = TRANSFER_SAVE_ALL;
923	}	1289	}
924		1290
925	static void	1291	static void
926	prepare_cede (struct transfer_args *ta)	1292	prepare_cede (pTHX_ struct transfer_args *ta)
927	{	1293	{
928	LOCK;	1294	api_ready (coro_current);
929	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
930	UNLOCK;
931
932	prepare_schedule (ta);	1295	prepare_schedule (aTHX_ ta);
		1296	}
		1297
		1298	static int
		1299	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1300	{
		1301	if (coro_nready)
		1302	{
		1303	SV *prev = SvRV (coro_current);
		1304	prepare_schedule (aTHX_ ta);
		1305	api_ready (prev);
		1306	return 1;
		1307	}
		1308	else
		1309	return 0;
933	}	1310	}
934		1311
935	static void	1312	static void
936	api_schedule (void)	1313	api_schedule (void)
937	{	1314	{
938	dTHX;	1315	dTHX;
939	struct transfer_args ta;	1316	struct transfer_args ta;
940		1317
941	prepare_schedule (&ta);	1318	prepare_schedule (aTHX_ &ta);
942	TRANSFER (ta);	1319	TRANSFER (ta);
943	}	1320	}
944		1321
945	static void	1322	static int
946	api_cede (void)	1323	api_cede (void)
947	{	1324	{
948	dTHX;	1325	dTHX;
949	struct transfer_args ta;	1326	struct transfer_args ta;
950		1327
951	prepare_cede (&ta);	1328	prepare_cede (aTHX_ &ta);
		1329
		1330	if (ta.prev != ta.next)
		1331	{
952	TRANSFER (ta);	1332	TRANSFER (ta);
		1333	return 1;
		1334	}
		1335	else
		1336	return 0;
953	}	1337	}
954		1338
		1339	static int
		1340	api_cede_notself (void)
		1341	{
		1342	dTHX;
		1343	struct transfer_args ta;
		1344
		1345	if (prepare_cede_notself (aTHX_ &ta))
		1346	{
		1347	TRANSFER (ta);
		1348	return 1;
		1349	}
		1350	else
		1351	return 0;
		1352	}
		1353
		1354	static void
		1355	api_trace (SV *coro_sv, int flags)
		1356	{
		1357	dTHX;
		1358	struct coro *coro = SvSTATE (coro_sv);
		1359
		1360	if (flags & CC_TRACE)
		1361	{
		1362	if (!coro->cctx)
		1363	coro->cctx = cctx_new ();
		1364	else if (!(coro->cctx->flags & CC_TRACE))
		1365	croak ("cannot enable tracing on coroutine with custom stack");
		1366
		1367	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1368	}
		1369	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1370	{
		1371	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1372
		1373	if (coro->flags & CF_RUNNING)
		1374	PL_runops = RUNOPS_DEFAULT;
		1375	else
		1376	coro->runops = RUNOPS_DEFAULT;
		1377	}
		1378	}
		1379
955	MODULE = Coro::State PACKAGE = Coro::State	1380	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
956		1381
957	PROTOTYPES: DISABLE	1382	PROTOTYPES: DISABLE
958		1383
959	BOOT:	1384	BOOT:
960	{	1385	{
961	#ifdef USE_ITHREADS	1386	#ifdef USE_ITHREADS
962	MUTEX_INIT (&coro_mutex);	1387	MUTEX_INIT (&coro_mutex);
963	#endif	1388	#endif
964	BOOT_PAGESIZE;	1389	BOOT_PAGESIZE;
965		1390
		1391	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1392	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1393
966	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1394	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
967		1395
968	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1396	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
969	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1397	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
970	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1398	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1399	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
971		1400
972	main_mainstack = PL_mainstack;	1401	main_mainstack = PL_mainstack;
		1402	main_top_env = PL_top_env;
		1403
		1404	while (main_top_env->je_prev)
		1405	main_top_env = main_top_env->je_prev;
973		1406
974	coroapi.ver = CORO_API_VERSION;	1407	coroapi.ver = CORO_API_VERSION;
975	coroapi.transfer = api_transfer;	1408	coroapi.transfer = api_transfer;
976		1409
977	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1410	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
984	struct coro *coro;	1417	struct coro *coro;
985	HV *hv;	1418	HV *hv;
986	int i;	1419	int i;
987		1420
988	Newz (0, coro, 1, struct coro);	1421	Newz (0, coro, 1, struct coro);
989	coro->args = newAV ();	1422	coro->args = newAV ();
		1423	coro->flags = CF_NEW;
990		1424
		1425	if (coro_first) coro_first->prev = coro;
		1426	coro->next = coro_first;
		1427	coro_first = coro;
		1428
991	hv = newHV ();	1429	coro->hv = hv = newHV ();
992	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1430	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
993	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1431	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
994		1432
		1433	av_extend (coro->args, items - 1);
		1434
995	for (i = 1; i < items; i++)	1435	for (i = 1; i < items; i++)
996	av_push (coro->args, newSVsv (ST (i)));	1436	av_push (coro->args, newSVsv (ST (i)));
997	}	1437	}
998	OUTPUT:	1438	OUTPUT:
999	RETVAL	1439	RETVAL
1000		1440
		1441	# these not obviously related functions are all rolled into the same xs
		1442	# function to increase chances that they all will call transfer with the same
		1443	# stack offset
1001	void	1444	void
1002	_set_stacklevel (...)	1445	_set_stacklevel (...)
1003	ALIAS:	1446	ALIAS:
1004	Coro::State::transfer = 1	1447	Coro::State::transfer = 1
1005	Coro::schedule = 2	1448	Coro::schedule = 2
1006	Coro::cede = 3	1449	Coro::cede = 3
1007	Coro::Cont::yield = 4	1450	Coro::cede_notself = 4
1008	CODE:	1451	CODE:
1009	{	1452	{
1010	struct transfer_args ta;	1453	struct transfer_args ta;
1011		1454
1012	switch (ix)	1455	switch (ix)
1013	{	1456	{
1014	case 0:	1457	case 0:
1015	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));	1458	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1016	ta.next = 0;	1459	ta.next = 0;
1017	ta.flags = TRANSFER_SET_STACKLEVEL;
1018	break;	1460	break;
1019		1461
1020	case 1:	1462	case 1:
1021	if (items != 3)	1463	if (items != 2)
1022	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1464	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1023		1465
1024	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1466	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1025	break;	1467	break;
1026		1468
1027	case 2:	1469	case 2:
1028	prepare_schedule (&ta);	1470	prepare_schedule (aTHX_ &ta);
1029	break;	1471	break;
1030		1472
1031	case 3:	1473	case 3:
1032	prepare_cede (&ta);	1474	prepare_cede (aTHX_ &ta);
1033	break;	1475	break;
1034		1476
1035	case 4:	1477	case 4:
1036	{	1478	if (!prepare_cede_notself (aTHX_ &ta))
1037	SV *yieldstack;	1479	XSRETURN_EMPTY;
1038	SV *sv;
1039	AV *defav = GvAV (PL_defgv);
1040		1480
1041	yieldstack = *hv_fetch (
1042	(HV *)SvRV (GvSV (coro_current)),
1043	"yieldstack", sizeof ("yieldstack") - 1,
1044	0
1045	);
1046
1047	/* set up @_ -- ugly */
1048	av_clear (defav);
1049	av_fill (defav, items - 1);
1050	while (items--)
1051	av_store (defav, items, SvREFCNT_inc (ST(items)));
1052
1053	sv = av_pop ((AV *)SvRV (yieldstack));
1054	ta.prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1055	ta.next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1056	ta.flags = 0;
1057	SvREFCNT_dec (sv);
1058	}
1059	break;	1481	break;
1060
1061	}	1482	}
1062		1483
		1484	BARRIER;
1063	TRANSFER (ta);	1485	TRANSFER (ta);
1064	}
1065		1486
1066	void	1487	if (GIMME_V != G_VOID && ta.next != ta.prev)
1067	_clone_state_from (SV dst, SV src)	1488	XSRETURN_YES;
		1489	}
		1490
		1491	bool
		1492	_destroy (SV *coro_sv)
1068	CODE:	1493	CODE:
1069	{	1494	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1070	struct coro *coro_src = SvSTATE (src);	1495	OUTPUT:
1071		1496	RETVAL
1072	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1073
1074	++coro_src->refcnt;
1075	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1076	}
1077		1497
1078	void	1498	void
1079	_exit (code)	1499	_exit (code)
1080	int code	1500	int code
1081	PROTOTYPE: $	1501	PROTOTYPE: $
1082	CODE:	1502	CODE:
1083	_exit (code);	1503	_exit (code);
1084		1504
1085	int	1505	int
		1506	cctx_stacksize (int new_stacksize = 0)
		1507	CODE:
		1508	RETVAL = coro_stacksize;
		1509	if (new_stacksize)
		1510	coro_stacksize = new_stacksize;
		1511	OUTPUT:
		1512	RETVAL
		1513
		1514	int
1086	cctx_count ()	1515	cctx_count ()
1087	CODE:	1516	CODE:
1088	RETVAL = cctx_count;	1517	RETVAL = cctx_count;
1089	OUTPUT:	1518	OUTPUT:
1090	RETVAL	1519	RETVAL
…		…
1094	CODE:	1523	CODE:
1095	RETVAL = cctx_idle;	1524	RETVAL = cctx_idle;
1096	OUTPUT:	1525	OUTPUT:
1097	RETVAL	1526	RETVAL
1098		1527
		1528	void
		1529	list ()
		1530	PPCODE:
		1531	{
		1532	struct coro *coro;
		1533	for (coro = coro_first; coro; coro = coro->next)
		1534	if (coro->hv)
		1535	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1536	}
		1537
		1538	void
		1539	call (Coro::State coro, SV *coderef)
		1540	ALIAS:
		1541	eval = 1
		1542	CODE:
		1543	{
		1544	if (coro->mainstack)
		1545	{
		1546	struct coro temp;
		1547	Zero (&temp, 1, struct coro);
		1548
		1549	if (!(coro->flags & CF_RUNNING))
		1550	{
		1551	save_perl (aTHX_ &temp);
		1552	load_perl (aTHX_ coro);
		1553	}
		1554
		1555	{
		1556	dSP;
		1557	ENTER;
		1558	SAVETMPS;
		1559	PUSHMARK (SP);
		1560	PUTBACK;
		1561	if (ix)
		1562	eval_sv (coderef, 0);
		1563	else
		1564	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1565	SPAGAIN;
		1566	FREETMPS;
		1567	LEAVE;
		1568	PUTBACK;
		1569	}
		1570
		1571	if (!(coro->flags & CF_RUNNING))
		1572	{
		1573	save_perl (aTHX_ coro);
		1574	load_perl (aTHX_ &temp);
		1575	}
		1576	}
		1577	}
		1578
		1579	SV *
		1580	is_ready (Coro::State coro)
		1581	PROTOTYPE: $
		1582	ALIAS:
		1583	is_ready = CF_READY
		1584	is_running = CF_RUNNING
		1585	is_new = CF_NEW
		1586	is_destroyed = CF_DESTROYED
		1587	CODE:
		1588	RETVAL = boolSV (coro->flags & ix);
		1589	OUTPUT:
		1590	RETVAL
		1591
		1592	void
		1593	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1594
		1595	SV *
		1596	has_stack (Coro::State coro)
		1597	PROTOTYPE: $
		1598	CODE:
		1599	RETVAL = boolSV (!!coro->cctx);
		1600	OUTPUT:
		1601	RETVAL
		1602
		1603	int
		1604	is_traced (Coro::State coro)
		1605	PROTOTYPE: $
		1606	CODE:
		1607	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1608	OUTPUT:
		1609	RETVAL
		1610
		1611	IV
		1612	rss (Coro::State coro)
		1613	PROTOTYPE: $
		1614	ALIAS:
		1615	usecount = 1
		1616	CODE:
		1617	switch (ix)
		1618	{
		1619	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1620	case 1: RETVAL = coro->usecount; break;
		1621	}
		1622	OUTPUT:
		1623	RETVAL
		1624
		1625
1099	MODULE = Coro::State PACKAGE = Coro	1626	MODULE = Coro::State PACKAGE = Coro
1100		1627
1101	BOOT:	1628	BOOT:
1102	{	1629	{
1103	int i;	1630	int i;
		1631
		1632	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1633	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1634	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1635
		1636	coro_current = get_sv ("Coro::current", FALSE);
		1637	SvREADONLY_on (coro_current);
1104		1638
1105	coro_stash = gv_stashpv ("Coro", TRUE);	1639	coro_stash = gv_stashpv ("Coro", TRUE);
1106		1640
1107	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1641	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1108	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1642	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1109	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1643	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1110	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1644	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1111	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1645	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1112	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1646	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1113		1647
1114	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1115	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1116
1117	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1648	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1118	coro_ready[i] = newAV ();	1649	coro_ready[i] = newAV ();
1119		1650
1120	{	1651	{
1121	SV *sv = perl_get_sv("Coro::API", 1);	1652	SV *sv = perl_get_sv("Coro::API", 1);
1122		1653
1123	coroapi.schedule = api_schedule;	1654	coroapi.schedule = api_schedule;
1124	coroapi.cede = api_cede;	1655	coroapi.cede = api_cede;
		1656	coroapi.cede_notself = api_cede_notself;
1125	coroapi.ready = api_ready;	1657	coroapi.ready = api_ready;
		1658	coroapi.is_ready = api_is_ready;
1126	coroapi.nready = &coro_nready;	1659	coroapi.nready = &coro_nready;
1127	coroapi.current = coro_current;	1660	coroapi.current = coro_current;
1128		1661
1129	GCoroAPI = &coroapi;	1662	GCoroAPI = &coroapi;
1130	sv_setiv (sv, (IV)&coroapi);	1663	sv_setiv (sv, (IV)&coroapi);
1131	SvREADONLY_on (sv);	1664	SvREADONLY_on (sv);
1132	}	1665	}
1133	}	1666	}
		1667
		1668	void
		1669	_set_current (SV *current)
		1670	PROTOTYPE: $
		1671	CODE:
		1672	SvREFCNT_dec (SvRV (coro_current));
		1673	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1134		1674
1135	int	1675	int
1136	prio (Coro::State coro, int newprio = 0)	1676	prio (Coro::State coro, int newprio = 0)
1137	ALIAS:	1677	ALIAS:
1138	nice = 1	1678	nice = 1
…		…
1141	RETVAL = coro->prio;	1681	RETVAL = coro->prio;
1142		1682
1143	if (items > 1)	1683	if (items > 1)
1144	{	1684	{
1145	if (ix)	1685	if (ix)
1146	newprio += coro->prio;	1686	newprio = coro->prio - newprio;
1147		1687
1148	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1688	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1149	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1689	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1150		1690
1151	coro->prio = newprio;	1691	coro->prio = newprio;
1152	}	1692	}
1153	}	1693	}
		1694	OUTPUT:
		1695	RETVAL
1154		1696
1155	void	1697	SV *
1156	ready (SV *self)	1698	ready (SV *self)
1157	PROTOTYPE: $	1699	PROTOTYPE: $
1158	CODE:	1700	CODE:
1159	api_ready (self);	1701	RETVAL = boolSV (api_ready (self));
		1702	OUTPUT:
		1703	RETVAL
1160		1704
1161	int	1705	int
1162	nready (...)	1706	nready (...)
1163	PROTOTYPE:	1707	PROTOTYPE:
1164	CODE:	1708	CODE:
1165	RETVAL = coro_nready;	1709	RETVAL = coro_nready;
1166	OUTPUT:	1710	OUTPUT:
1167	RETVAL	1711	RETVAL
1168		1712
		1713	# for async_pool speedup
		1714	void
		1715	_pool_1 (SV *cb)
		1716	CODE:
		1717	{
		1718	struct coro *coro = SvSTATE (coro_current);
		1719	HV hv = (HV )SvRV (coro_current);
		1720	AV *defav = GvAV (PL_defgv);
		1721	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1722	AV *invoke_av;
		1723	int i, len;
		1724
		1725	if (!invoke)
		1726	croak ("\3terminate\2\n");
		1727
		1728	SvREFCNT_dec (coro->saved_deffh);
		1729	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1730
		1731	hv_store (hv, "desc", sizeof ("desc") - 1,
		1732	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1733
		1734	invoke_av = (AV *)SvRV (invoke);
		1735	len = av_len (invoke_av);
		1736
		1737	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1738
		1739	if (len > 0)
		1740	{
		1741	av_fill (defav, len - 1);
		1742	for (i = 0; i < len; ++i)
		1743	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1744	}
		1745
		1746	SvREFCNT_dec (invoke);
		1747	}
		1748
		1749	void
		1750	_pool_2 (SV *cb)
		1751	CODE:
		1752	{
		1753	struct coro *coro = SvSTATE (coro_current);
		1754
		1755	sv_setsv (cb, &PL_sv_undef);
		1756
		1757	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1758	coro->saved_deffh = 0;
		1759
		1760	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1761	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1762	croak ("\3terminate\2\n");
		1763
		1764	av_clear (GvAV (PL_defgv));
		1765	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1766	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1767
		1768	coro->prio = 0;
		1769
		1770	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1771	api_trace (coro_current, 0);
		1772
		1773	av_push (av_async_pool, newSVsv (coro_current));
		1774	}
		1775
		1776
1169	MODULE = Coro::State PACKAGE = Coro::AIO	1777	MODULE = Coro::State PACKAGE = Coro::AIO
1170		1778
1171	SV *	1779	SV *
1172	_get_state ()	1780	_get_state ()
1173	CODE:	1781	CODE:
1174	{	1782	{
1175	struct {	1783	struct io_state *data;
1176	int errorno;
1177	int laststype;
1178	int laststatval;
1179	Stat_t statcache;
1180	} data;
1181		1784
		1785	RETVAL = newSV (sizeof (struct io_state));
		1786	data = (struct io_state *)SvPVX (RETVAL);
		1787	SvCUR_set (RETVAL, sizeof (struct io_state));
		1788	SvPOK_only (RETVAL);
		1789
1182	data.errorno = errno;	1790	data->errorno = errno;
1183	data.laststype = PL_laststype;	1791	data->laststype = PL_laststype;
1184	data.laststatval = PL_laststatval;	1792	data->laststatval = PL_laststatval;
1185	data.statcache = PL_statcache;	1793	data->statcache = PL_statcache;
1186
1187	RETVAL = newSVpvn ((char *)&data, sizeof data);
1188	}	1794	}
1189	OUTPUT:	1795	OUTPUT:
1190	RETVAL	1796	RETVAL
1191		1797
1192	void	1798	void
1193	_set_state (char *data_)	1799	_set_state (char *data_)
1194	PROTOTYPE: $	1800	PROTOTYPE: $
1195	CODE:	1801	CODE:
1196	{	1802	{
1197	struct {	1803	struct io_state data = (void )data_;
1198	int errorno;
1199	int laststype;
1200	int laststatval;
1201	Stat_t statcache;
1202	} data = (void )data_;
1203		1804
1204	errno = data->errorno;	1805	errno = data->errorno;
1205	PL_laststype = data->laststype;	1806	PL_laststype = data->laststype;
1206	PL_laststatval = data->laststatval;	1807	PL_laststatval = data->laststatval;
1207	PL_statcache = data->statcache;	1808	PL_statcache = data->statcache;
1208	}	1809	}
		1810

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Comparing Coro/Coro/State.xs (file contents): Revision 1.108 by root, Mon Nov 27 18:15:47 2006 UTC vs. Revision 1.192 by root, Fri Oct 5 21:51:40 2007 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.108 by root, Mon Nov 27 18:15:47 2006 UTC vs.
Revision 1.192 by root, Fri Oct 5 21:51:40 2007 UTC