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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.44 by root, Sat Mar 22 18:50:32 2003 UTC vs.
Revision 1.103 by root, Mon Nov 27 01:33:30 2006 UTC

		1	#include "libcoro/coro.c"
		2
1	#include "EXTERN.h"	3	#include "EXTERN.h"
2	#include "perl.h"	4	#include "perl.h"
3	#include "XSUB.h"	5	#include "XSUB.h"
4		6
5	#include "libcoro/coro.c"	7	#include "patchlevel.h"
6		8
		9	#define PERL_VERSION_ATLEAST(a,b,c) \
		10	(PERL_REVISION > (a) \
		11	|| (PERL_REVISION == (a) \
		12	&& (PERL_VERSION > (b) \
		13	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		14
		15	#if !PERL_VERSION_ATLEAST (5,6,0)
		16	# ifndef PL_ppaddr
		17	# define PL_ppaddr ppaddr
		18	# endif
		19	# ifndef call_sv
		20	# define call_sv perl_call_sv
		21	# endif
		22	# ifndef get_sv
		23	# define get_sv perl_get_sv
		24	# endif
		25	# ifndef get_cv
		26	# define get_cv perl_get_cv
		27	# endif
		28	# ifndef IS_PADGV
		29	# define IS_PADGV(v) 0
		30	# endif
		31	# ifndef IS_PADCONST
		32	# define IS_PADCONST(v) 0
		33	# endif
		34	#endif
		35
7	#include <signal.h>	36	#include <stdio.h>
		37	#include <errno.h>
		38
		39	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		40	# undef STACKGUARD
		41	#endif
		42
		43	#ifndef STACKGUARD
		44	# define STACKGUARD 0
		45	#endif
8		46
9	#ifdef HAVE_MMAP	47	#ifdef HAVE_MMAP
10	# include <unistd.h>	48	# include <unistd.h>
11	# include <sys/mman.h>	49	# include <sys/mman.h>
12	# ifndef MAP_ANONYMOUS	50	# ifndef MAP_ANONYMOUS
…		…
14	# define MAP_ANONYMOUS MAP_ANON	52	# define MAP_ANONYMOUS MAP_ANON
15	# else	53	# else
16	# undef HAVE_MMAP	54	# undef HAVE_MMAP
17	# endif	55	# endif
18	# endif	56	# endif
		57	# include <limits.h>
		58	# ifndef PAGESIZE
		59	# define PAGESIZE pagesize
		60	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		61	static long pagesize;
		62	# else
		63	# define BOOT_PAGESIZE
19	#endif	64	# endif
20		65	#endif
21	#define MAY_FLUSH /* increases codesize and is rarely used */
22
23	#define SUB_INIT "Coro::State::initialize"
24	#define UCORO_STATE "_coro_state"
25		66
26	/* The next macro should declare a variable stacklevel that contains and approximation	67	/* The next macro should declare a variable stacklevel that contains and approximation
27	* to the current C stack pointer. Its property is that it changes with each call	68	* to the current C stack pointer. Its property is that it changes with each call
28	* and should be unique. */	69	* and should be unique. */
		70	#define dSTACKLEVEL int stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	71	#define STACKLEVEL ((void *)&stacklevel)
30		72
31	#define IN_DESTRUCT (PL_main_cv == Nullcv)	73	#define IN_DESTRUCT (PL_main_cv == Nullcv)
32		74
33	#define labs(l) ((l) >= 0 ? (l) : -(l))	75	#if __GNUC__ >= 3
		76	# define attribute(x) __attribute__(x)
		77	#else
		78	# define attribute(x)
		79	#endif
		80
		81	#define NOINLINE attribute ((noinline))
34		82
35	#include "CoroAPI.h"	83	#include "CoroAPI.h"
36		84
		85	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
		86
		87	#ifdef USE_ITHREADS
		88	static perl_mutex coro_mutex;
		89	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		90	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		91	#else
		92	# define LOCK (void)0
		93	# define UNLOCK (void)0
		94	#endif
		95
37	static struct CoroAPI coroapi;	96	static struct CoroAPI coroapi;
		97	static AV *main_mainstack; /* used to differentiate between $main and others */
		98	static HV *coro_state_stash, *coro_stash;
		99	static SV *coro_mortal; /* will be freed after next transfer */
38		100
39	/* this is actually not only the c stack but also c registers etc... */	101	/* this is a structure representing a c-level coroutine */
40	typedef struct {	102	typedef struct coro_stack {
41	int refcnt; /* pointer reference counter */	103	struct coro_stack *next;
42	int usecnt; /* shared by how many coroutines */
43	int gencnt; /* generation counter */
44		104
45	coro_context cctx;	105	/* the stack */
46
47	void *sptr;	106	void *sptr;
48	long ssize; /* positive == mmap, otherwise malloc */	107	long ssize; /* positive == mmap, otherwise malloc */
		108
		109	/* cpu state */
		110	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		111	JMPENV *top_env;
		112	coro_context cctx;
49	} coro_stack;	113	} coro_stack;
50		114
		115	/* this is a structure representing a perl-level coroutine */
51	struct coro {	116	struct coro {
52	/* the optional C context */	117	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	118	coro_stack *stack;
54	void *cursp;	119
		120	/* data associated with this coroutine (initial args) */
		121	AV *args;
55	int gencnt;	122	int refcnt;
56		123
57	/* optionally saved, might be zero */	124	/* optionally saved, might be zero */
58	AV *defav;	125	AV *defav;
59	SV *defsv;	126	SV *defsv;
60	SV *errsv;	127	SV *errsv;
…		…
69	AV *mainstack;	136	AV *mainstack;
70	SV **stack_sp;	137	SV **stack_sp;
71	OP *op;	138	OP *op;
72	SV **curpad;	139	SV **curpad;
73	AV *comppad;	140	AV *comppad;
		141	CV *compcv;
74	SV **stack_base;	142	SV **stack_base;
75	SV **stack_max;	143	SV **stack_max;
76	SV **tmps_stack;	144	SV **tmps_stack;
77	I32 tmps_floor;	145	I32 tmps_floor;
78	I32 tmps_ix;	146	I32 tmps_ix;
…		…
87	I32 savestack_ix;	155	I32 savestack_ix;
88	I32 savestack_max;	156	I32 savestack_max;
89	OP **retstack;	157	OP **retstack;
90	I32 retstack_ix;	158	I32 retstack_ix;
91	I32 retstack_max;	159	I32 retstack_max;
		160	PMOP *curpm;
92	COP *curcop;	161	COP *curcop;
93	JMPENV *top_env;
94		162
95	/* data associated with this coroutine (initial args) */	163	/* coro process data */
96	AV *args;	164	int prio;
97	};	165	};
98		166
99	typedef struct coro *Coro__State;	167	typedef struct coro *Coro__State;
100	typedef struct coro *Coro__State_or_hashref;	168	typedef struct coro *Coro__State_or_hashref;
101		169
102	static AV *main_mainstack; /* used to differentiate between $main and others */	170	static AV *
103	static HV *coro_state_stash;	171	coro_clone_padlist (CV *cv)
104	static SV *ucoro_state_sv;
105	static U32 ucoro_state_hash;
106	static HV *padlist_cache;
107	static SV *coro_mortal; /* will be freed after next transfer */
108
109	/* mostly copied from op.c:cv_clone2 */
110	STATIC AV *
111	clone_padlist (AV *protopadlist)
112	{	172	{
113	AV *av;	173	AV *padlist = CvPADLIST (cv);
114	I32 ix;
115	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
116	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
117	SV **pname = AvARRAY (protopad_name);
118	SV **ppad = AvARRAY (protopad);
119	I32 fname = AvFILLp (protopad_name);
120	I32 fpad = AvFILLp (protopad);
121	AV *newpadlist, *newpad_name, *newpad;	174	AV *newpadlist, *newpad;
122	SV **npad;
123
124	newpad_name = newAV ();
125	for (ix = fname; ix >= 0; ix--)
126	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
127
128	newpad = newAV ();
129	av_fill (newpad, AvFILLp (protopad));
130	npad = AvARRAY (newpad);
131		175
132	newpadlist = newAV ();	176	newpadlist = newAV ();
133	AvREAL_off (newpadlist);	177	AvREAL_off (newpadlist);
134	av_store (newpadlist, 0, (SV *) newpad_name);	178	#if PERL_VERSION_ATLEAST (5,9,0)
		179	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		180	#else
		181	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		182	#endif
		183	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		184	--AvFILLp (padlist);
		185
		186	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
135	av_store (newpadlist, 1, (SV *) newpad);	187	av_store (newpadlist, 1, (SV *)newpad);
136		188
137	av = newAV (); /* will be @_ */	189	return newpadlist;
138	av_extend (av, 0);	190	}
139	av_store (newpad, 0, (SV *) av);
140	AvFLAGS (av) = AVf_REIFY;
141		191
142	for (ix = fpad; ix > 0; ix--)	192	static void
		193	free_padlist (AV *padlist)
		194	{
		195	/* may be during global destruction */
		196	if (SvREFCNT (padlist))
143	{	197	{
144	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	198	I32 i = AvFILLp (padlist);
145	if (namesv && namesv != &PL_sv_undef)	199	while (i >= 0)
146	{	200	{
147	char *name = SvPVX (namesv); /* XXX */	201	SV **svp = av_fetch (padlist, i--, FALSE);
148	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	202	if (svp)
149	{ /* lexical from outside? */
150	npad[ix] = SvREFCNT_inc (ppad[ix]);
151	}	203	{
152	else
153	{ /* our own lexical */
154	SV *sv;	204	SV *sv;
155	if (*name == '&')	205	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
156	sv = SvREFCNT_inc (ppad[ix]);	206	SvREFCNT_dec (sv);
157	else if (*name == '@')	207
158	sv = (SV *) newAV ();	208	SvREFCNT_dec (*svp);
159	else if (*name == '%')
160	sv = (SV *) newHV ();
161	else
162	sv = NEWSV (0, 0);
163	if (!SvPADBUSY (sv))
164	SvPADMY_on (sv);
165	npad[ix] = sv;
166	}	209	}
167	}	210	}
168	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	211
169	{	212	SvREFCNT_dec ((SV*)padlist);
170	npad[ix] = SvREFCNT_inc (ppad[ix]);
171	}
172	else
173	{
174	SV *sv = NEWSV (0, 0);
175	SvPADTMP_on (sv);
176	npad[ix] = sv;
177	}
178	}	213	}
		214	}
179		215
180	#if 0 /* return -ENOTUNDERSTOOD */	216	static int
181	/* Now that vars are all in place, clone nested closures. */	217	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		218	{
		219	AV *padlist;
		220	AV *av = (AV *)mg->mg_obj;
182		221
183	for (ix = fpad; ix > 0; ix--) {	222	/* casting is fun. */
184	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	223	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
185	if (namesv	224	free_padlist (padlist);
186	&& namesv != &PL_sv_undef	225
187	&& !(SvFLAGS(namesv) & SVf_FAKE)	226	SvREFCNT_dec (av);
188	&& *SvPVX(namesv) == '&'	227
189	&& CvCLONE(ppad[ix]))	228	return 0;
190	{	229	}
191	CV *kid = cv_clone((CV*)ppad[ix]);	230
192	SvREFCNT_dec(ppad[ix]);	231	#define PERL_MAGIC_coro PERL_MAGIC_ext
193	CvCLONE_on(kid);	232
194	SvPADMY_on(kid);	233	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
195	npad[ix] = (SV*)kid;	234
196	}	235	/* the next two functions merely cache the padlists */
		236	static void
		237	get_padlist (CV *cv)
		238	{
		239	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		240
		241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
		242	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
		243	else
		244	{
		245	#if 0
		246	/* this is probably cleaner, but also slower? */
		247	CV *cp = Perl_cv_clone (cv);
		248	CvPADLIST (cv) = CvPADLIST (cp);
		249	CvPADLIST (cp) = 0;
		250	SvREFCNT_dec (cp);
		251	#else
		252	CvPADLIST (cv) = coro_clone_padlist (cv);
		253	#endif
		254	}
		255	}
		256
		257	static void
		258	put_padlist (CV *cv)
		259	{
		260	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		261
		262	if (!mg)
		263	{
		264	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		265	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		266	mg->mg_virtual = &vtbl_coro;
		267	mg->mg_obj = (SV *)newAV ();
197	}	268	}
198	#endif
199		269
200	return newpadlist;
201	}
202
203	#ifdef MAY_FLUSH
204	STATIC void
205	free_padlist (AV *padlist)
206	{
207	/* may be during global destruction */
208	if (SvREFCNT(padlist))
209	{
210	I32 i = AvFILLp(padlist);
211	while (i >= 0)
212	{
213	SV **svp = av_fetch(padlist, i--, FALSE);
214	SV *sv = svp ? *svp : Nullsv;
215	if (sv)
216	SvREFCNT_dec(sv);
217	}
218
219	SvREFCNT_dec((SV*)padlist);
220	}
221	}
222	#endif
223
224	/* the next two functions merely cache the padlists */
225	STATIC void
226	get_padlist (CV *cv)
227	{
228	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
229
230	if (he && AvFILLp ((AV *)*he) >= 0)
231	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
232	else
233	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
234	}
235
236	STATIC void
237	put_padlist (CV *cv)
238	{
239	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
240
241	if (SvTYPE (*he) != SVt_PVAV)
242	{
243	SvREFCNT_dec (*he);
244	*he = (SV *)newAV ();
245	}
246
247	av_push ((AV *)*he, (SV *)CvPADLIST (cv));	270	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
248	}	271	}
249
250	#ifdef MAY_FLUSH
251	STATIC void
252	flush_padlist_cache ()
253	{
254	HV *hv = padlist_cache;
255	padlist_cache = newHV ();
256
257	if (hv_iterinit (hv))
258	{
259	HE *he;
260	AV *padlist;
261
262	while (!!(he = hv_iternext (hv)))
263	{
264	AV *av = (AV *)HeVAL(he);
265
266	/* casting is fun. */
267	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
268	free_padlist (padlist);
269	}
270	}
271
272	SvREFCNT_dec (hv);
273	}
274	#endif
275		272
276	#define SB do {	273	#define SB do {
277	#define SE } while (0)	274	#define SE } while (0)
278		275
279	#define LOAD(state) load_state(aTHX_ (state));	276	#define LOAD(state) load_state((state));
280	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	277	#define SAVE(state,flags) save_state((state),(flags));
281		278
282	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	279	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
283		280
284	static void	281	static void
285	load_state(pTHX_ Coro__State c)	282	load_state(Coro__State c)
286	{	283	{
287	PL_dowarn = c->dowarn;	284	PL_dowarn = c->dowarn;
288	PL_in_eval = c->in_eval;	285	PL_in_eval = c->in_eval;
289		286
290	PL_curstackinfo = c->curstackinfo;	287	PL_curstackinfo = c->curstackinfo;
…		…
292	PL_mainstack = c->mainstack;	289	PL_mainstack = c->mainstack;
293	PL_stack_sp = c->stack_sp;	290	PL_stack_sp = c->stack_sp;
294	PL_op = c->op;	291	PL_op = c->op;
295	PL_curpad = c->curpad;	292	PL_curpad = c->curpad;
296	PL_comppad = c->comppad;	293	PL_comppad = c->comppad;
		294	PL_compcv = c->compcv;
297	PL_stack_base = c->stack_base;	295	PL_stack_base = c->stack_base;
298	PL_stack_max = c->stack_max;	296	PL_stack_max = c->stack_max;
299	PL_tmps_stack = c->tmps_stack;	297	PL_tmps_stack = c->tmps_stack;
300	PL_tmps_floor = c->tmps_floor;	298	PL_tmps_floor = c->tmps_floor;
301	PL_tmps_ix = c->tmps_ix;	299	PL_tmps_ix = c->tmps_ix;
…		…
307	PL_scopestack_ix = c->scopestack_ix;	305	PL_scopestack_ix = c->scopestack_ix;
308	PL_scopestack_max = c->scopestack_max;	306	PL_scopestack_max = c->scopestack_max;
309	PL_savestack = c->savestack;	307	PL_savestack = c->savestack;
310	PL_savestack_ix = c->savestack_ix;	308	PL_savestack_ix = c->savestack_ix;
311	PL_savestack_max = c->savestack_max;	309	PL_savestack_max = c->savestack_max;
		310	#if !PERL_VERSION_ATLEAST (5,9,0)
312	PL_retstack = c->retstack;	311	PL_retstack = c->retstack;
313	PL_retstack_ix = c->retstack_ix;	312	PL_retstack_ix = c->retstack_ix;
314	PL_retstack_max = c->retstack_max;	313	PL_retstack_max = c->retstack_max;
		314	#endif
		315	PL_curpm = c->curpm;
315	PL_curcop = c->curcop;	316	PL_curcop = c->curcop;
316	PL_top_env = c->top_env;
317		317
318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
321		321
…		…
330		330
331	if (padlist)	331	if (padlist)
332	{	332	{
333	put_padlist (cv); /* mark this padlist as available */	333	put_padlist (cv); /* mark this padlist as available */
334	CvPADLIST(cv) = padlist;	334	CvPADLIST(cv) = padlist;
335	#ifdef USE_THREADS
336	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
337	#endif
338	}	335	}
339		336
340	++CvDEPTH(cv);	337	++CvDEPTH(cv);
341	}	338	}
342		339
343	PUTBACK;	340	PUTBACK;
344	}	341	}
345	}	342	}
346		343
347	static void	344	static void
348	save_state(pTHX_ Coro__State c, int flags)	345	save_state(Coro__State c, int flags)
349	{	346	{
350	{	347	{
351	dSP;	348	dSP;
352	I32 cxix = cxstack_ix;	349	I32 cxix = cxstack_ix;
353	PERL_CONTEXT *ccstk = cxstack;	350	PERL_CONTEXT *ccstk = cxstack;
…		…
369	if (CxTYPE(cx) == CXt_SUB)	366	if (CxTYPE(cx) == CXt_SUB)
370	{	367	{
371	CV *cv = cx->blk_sub.cv;	368	CV *cv = cx->blk_sub.cv;
372	if (CvDEPTH(cv))	369	if (CvDEPTH(cv))
373	{	370	{
374	#ifdef USE_THREADS
375	/*XPUSHs ((SV *)CvOWNER(cv));*/
376	/*CvOWNER(cv) = 0;*/
377	/*error must unlock this cv etc.. etc...*/
378	#endif
379	EXTEND (SP, CvDEPTH(cv)*2);	371	EXTEND (SP, CvDEPTH(cv)*2);
380		372
381	while (--CvDEPTH(cv))	373	while (--CvDEPTH(cv))
382	{	374	{
383	/* this tells the restore code to increment CvDEPTH */	375	/* this tells the restore code to increment CvDEPTH */
…		…
386	}	378	}
387		379
388	PUSHs ((SV *)CvPADLIST(cv));	380	PUSHs ((SV *)CvPADLIST(cv));
389	PUSHs ((SV *)cv);	381	PUSHs ((SV *)cv);
390		382
391	get_padlist (cv); /* this is a monster */	383	get_padlist (cv);
392	}	384	}
393	}	385	}
		386	#ifdef CXt_FORMAT
394	else if (CxTYPE(cx) == CXt_FORMAT)	387	else if (CxTYPE(cx) == CXt_FORMAT)
395	{	388	{
396	/* I never used formats, so how should I know how these are implemented? */	389	/* I never used formats, so how should I know how these are implemented? */
397	/* my bold guess is as a simple, plain sub... */	390	/* my bold guess is as a simple, plain sub... */
398	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	391	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
399	}	392	}
		393	#endif
400	}	394	}
401		395
402	if (top_si->si_type == PERLSI_MAIN)	396	if (top_si->si_type == PERLSI_MAIN)
403	break;	397	break;
404		398
…		…
422	c->mainstack = PL_mainstack;	416	c->mainstack = PL_mainstack;
423	c->stack_sp = PL_stack_sp;	417	c->stack_sp = PL_stack_sp;
424	c->op = PL_op;	418	c->op = PL_op;
425	c->curpad = PL_curpad;	419	c->curpad = PL_curpad;
426	c->comppad = PL_comppad;	420	c->comppad = PL_comppad;
		421	c->compcv = PL_compcv;
427	c->stack_base = PL_stack_base;	422	c->stack_base = PL_stack_base;
428	c->stack_max = PL_stack_max;	423	c->stack_max = PL_stack_max;
429	c->tmps_stack = PL_tmps_stack;	424	c->tmps_stack = PL_tmps_stack;
430	c->tmps_floor = PL_tmps_floor;	425	c->tmps_floor = PL_tmps_floor;
431	c->tmps_ix = PL_tmps_ix;	426	c->tmps_ix = PL_tmps_ix;
…		…
437	c->scopestack_ix = PL_scopestack_ix;	432	c->scopestack_ix = PL_scopestack_ix;
438	c->scopestack_max = PL_scopestack_max;	433	c->scopestack_max = PL_scopestack_max;
439	c->savestack = PL_savestack;	434	c->savestack = PL_savestack;
440	c->savestack_ix = PL_savestack_ix;	435	c->savestack_ix = PL_savestack_ix;
441	c->savestack_max = PL_savestack_max;	436	c->savestack_max = PL_savestack_max;
		437	#if !PERL_VERSION_ATLEAST (5,9,0)
442	c->retstack = PL_retstack;	438	c->retstack = PL_retstack;
443	c->retstack_ix = PL_retstack_ix;	439	c->retstack_ix = PL_retstack_ix;
444	c->retstack_max = PL_retstack_max;	440	c->retstack_max = PL_retstack_max;
		441	#endif
		442	c->curpm = PL_curpm;
445	c->curcop = PL_curcop;	443	c->curcop = PL_curcop;
446	c->top_env = PL_top_env;
447	}	444	}
448		445
449	/*	446	/*
450	* allocate various perl stacks. This is an exact copy	447	* allocate various perl stacks. This is an exact copy
451	* of perl.c:init_stacks, except that it uses less memory	448	* of perl.c:init_stacks, except that it uses less memory
452	* on the assumption that coroutines do not usually need	449	* on the (sometimes correct) assumption that coroutines do
453	* a lot of stackspace.	450	* not usually need a lot of stackspace.
454	*/	451	*/
455	STATIC void	452	static void
456	coro_init_stacks (pTHX)	453	coro_init_stacks ()
457	{	454	{
458	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
459	PL_curstackinfo->si_type = PERLSI_MAIN;	456	PL_curstackinfo->si_type = PERLSI_MAIN;
460	PL_curstack = PL_curstackinfo->si_stack;	457	PL_curstack = PL_curstackinfo->si_stack;
461	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
471		468
472	New(54,PL_markstack,16,I32);	469	New(54,PL_markstack,16,I32);
473	PL_markstack_ptr = PL_markstack;	470	PL_markstack_ptr = PL_markstack;
474	PL_markstack_max = PL_markstack + 16;	471	PL_markstack_max = PL_markstack + 16;
475		472
		473	#ifdef SET_MARK_OFFSET
476	SET_MARK_OFFSET;	474	SET_MARK_OFFSET;
		475	#endif
477		476
478	New(54,PL_scopestack,16,I32);	477	New(54,PL_scopestack,16,I32);
479	PL_scopestack_ix = 0;	478	PL_scopestack_ix = 0;
480	PL_scopestack_max = 16;	479	PL_scopestack_max = 16;
481		480
482	New(54,PL_savestack,96,ANY);	481	New(54,PL_savestack,96,ANY);
483	PL_savestack_ix = 0;	482	PL_savestack_ix = 0;
484	PL_savestack_max = 96;	483	PL_savestack_max = 96;
485		484
		485	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	486	New(54,PL_retstack,8,OP*);
487	PL_retstack_ix = 0;	487	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	488	PL_retstack_max = 8;
		489	#endif
489	}	490	}
490		491
491	/*	492	/*
492	* destroy the stacks, the callchain etc...	493	* destroy the stacks, the callchain etc...
493	* still there is a memleak of 128 bytes...
494	*/	494	*/
495	STATIC void	495	static void
496	destroy_stacks(pTHX)	496	coro_destroy_stacks()
497	{	497	{
498	if (!IN_DESTRUCT)	498	if (!IN_DESTRUCT)
499	{	499	{
500	/* is this ugly, I ask? */	500	/* is this ugly, I ask? */
501	while (PL_scopestack_ix)	501	LEAVE_SCOPE (0);
502	LEAVE;
503		502
504	/* sure it is, but more important: is it correct?? :/ */	503	/* sure it is, but more important: is it correct?? :/ */
505	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
506	FREETMPS;	504	FREETMPS;
		505
		506	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
507	}	507	}
508		508
509	while (PL_curstackinfo->si_next)	509	while (PL_curstackinfo->si_next)
510	PL_curstackinfo = PL_curstackinfo->si_next;	510	PL_curstackinfo = PL_curstackinfo->si_next;
511		511
512	while (PL_curstackinfo)	512	while (PL_curstackinfo)
513	{	513	{
514	PERL_SI *p = PL_curstackinfo->si_prev;	514	PERL_SI *p = PL_curstackinfo->si_prev;
515		515
516	{	516	{ /*D*//*remove*/
517	dSP;	517	dSP;
518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519	PUTBACK; /* possibly superfluous */	519	PUTBACK; /* possibly superfluous */
520	}	520	}
521		521
522	if (!IN_DESTRUCT)	522	if (!IN_DESTRUCT)
523	{	523	{
524	dounwind(-1);	524	dounwind (-1);/*D*//*remove*/
525	SvREFCNT_dec(PL_curstackinfo->si_stack);	525	SvREFCNT_dec (PL_curstackinfo->si_stack);
526	}	526	}
527		527
528	Safefree(PL_curstackinfo->si_cxstack);	528	Safefree (PL_curstackinfo->si_cxstack);
529	Safefree(PL_curstackinfo);	529	Safefree (PL_curstackinfo);
530	PL_curstackinfo = p;	530	PL_curstackinfo = p;
531	}	531	}
532		532
533	Safefree(PL_tmps_stack);	533	Safefree (PL_tmps_stack);
534	Safefree(PL_markstack);	534	Safefree (PL_markstack);
535	Safefree(PL_scopestack);	535	Safefree (PL_scopestack);
536	Safefree(PL_savestack);	536	Safefree (PL_savestack);
		537	#if !PERL_VERSION_ATLEAST (5,9,0)
537	Safefree(PL_retstack);	538	Safefree (PL_retstack);
538	}
539
540	static void
541	allocate_stack (Coro__State ctx, int alloc)
542	{
543	coro_stack *stack;
544
545	New (0, stack, 1, coro_stack);
546
547	stack->refcnt = 1;
548	stack->usecnt = 1;
549	stack->gencnt = ctx->gencnt = 0;
550	if (alloc)
551	{
552	#if HAVE_MMAP
553	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
554	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
555	if (stack->sptr == (void *)-1)
556	#endif	539	#endif
557	{
558	/*FIXME*//*D*//* reasonable stack size! */
559	stack->ssize = -4096 * sizeof (long);
560	New (0, stack->sptr, 4096, long);
561	}
562	}
563	else
564	stack->sptr = 0;
565
566	ctx->stack = stack;
567	}	540	}
568		541
569	static void	542	static void
570	deallocate_stack (Coro__State ctx)	543	setup_coro (struct coro *coro)
571	{
572	coro_stack *stack = ctx->stack;
573
574	ctx->stack = 0;
575
576	if (stack)
577	{
578	if (!--stack->refcnt)
579	{
580	#ifdef HAVE_MMAP
581	if (stack->ssize > 0 && stack->sptr)
582	munmap (stack->sptr, stack->ssize);
583	else
584	#else
585	Safefree (stack->sptr);
586	#endif
587	Safefree (stack);
588	}
589	else if (ctx->gencnt == stack->gencnt)
590	--stack->usecnt;
591	}
592	}
593
594	static void
595	setup_coro (void *arg)
596	{	544	{
597	/*	545	/*
598	* emulate part of the perl startup here.	546	* emulate part of the perl startup here.
599	*/	547	*/
600	dSP;
601	Coro__State ctx = (Coro__State)arg;
602	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
603		548
604	coro_init_stacks (aTHX);	549	coro_init_stacks ();
		550
605	/*PL_curcop = 0;*/	551	PL_curcop = 0;
606	/*PL_in_eval = PL_in_eval;*/ /* inherit */	552	PL_in_eval = 0;
		553	PL_curpm = 0;
		554
		555	{
		556	dSP;
		557	LOGOP myop;
		558
		559	/* I have no idea why this is needed, but it is */
		560	PUSHMARK (SP);
		561
607	SvREFCNT_dec (GvAV (PL_defgv));	562	SvREFCNT_dec (GvAV (PL_defgv));
608	GvAV (PL_defgv) = ctx->args;	563	GvAV (PL_defgv) = coro->args; coro->args = 0;
609		564
610	SPAGAIN;
611
612	if (ctx->stack)
613	{
614	ctx->cursp = 0;
615
616	PUSHMARK(SP);
617	PUTBACK;
618	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
619
620	if (SvTRUE (ERRSV))
621	croak (NULL);
622	else
623	croak ("FATAL: CCTXT coroutine returned!");
624	}
625	else
626	{
627	UNOP myop;
628
629	PL_op = (OP *)&myop;
630
631	Zero(&myop, 1, UNOP);	565	Zero (&myop, 1, LOGOP);
632	myop.op_next = Nullop;	566	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;	567	myop.op_flags = OPf_WANT_VOID;
634		568
		569	PL_op = (OP *)&myop;
		570
635	PUSHMARK(SP);	571	PUSHMARK (SP);
636	XPUSHs (sub_init);	572	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
637	/*
638	* the next line is slightly wrong, as PL_op->op_next
639	* is actually being executed so we skip the first op.
640	* that doesn't matter, though, since it is only
641	* pp_nextstate and we never return...
642	* ah yes, and I don't care anyways ;)
643	*/
644	PUTBACK;	573	PUTBACK;
645	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
646	SPAGAIN;	575	SPAGAIN;
647		576
648	ENTER; /* necessary e.g. for dounwind */	577	ENTER; /* necessary e.g. for dounwind */
649	}	578	}
650	}	579	}
651		580
652	static void	581	static void
653	continue_coro (void *arg)	582	free_coro_mortal ()
654	{	583	{
655	/*
656	* this is a _very_ stripped down perl interpreter ;)
657	*/
658	Coro__State ctx = (Coro__State)arg;
659	JMPENV coro_start_env;
660
661	/* same as JMPENV_BOOTSTRAP */
662	Zero(&coro_start_env, 1, JMPENV);
663	coro_start_env.je_ret = -1;
664	coro_start_env.je_mustcatch = TRUE;
665	PL_top_env = &coro_start_env;
666
667	ctx->cursp = 0;
668	PL_op = PL_op->op_next;
669	CALLRUNOPS(aTHX);
670
671	abort ();
672	}
673
674	STATIC void
675	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
676	{
677	dSTACKLEVEL;
678	static struct coro *xnext;
679
680	if (prev != next)
681	{
682	xnext = next;
683
684	if (next->mainstack)
685	{
686	SAVE (prev, flags);
687	LOAD (next);
688
689	/* mark this state as in-use */
690	next->mainstack = 0;
691	next->tmps_ix = -2;
692
693	/* stacklevel changed? if yes, grab the stack for us! */
694	if (flags & TRANSFER_SAVE_CCTXT)
695	{
696	if (!prev->stack)
697	allocate_stack (prev, 0);
698	else if (prev->cursp != stacklevel
699	&& prev->stack->usecnt > 1)
700	{
701	prev->gencnt = ++prev->stack->gencnt;
702	prev->stack->usecnt = 1;
703	}
704
705	/* has our stack been invalidated? */
706	if (next->stack && next->stack->gencnt != next->gencnt)
707	{
708	deallocate_stack (next);
709	allocate_stack (next, 1);
710	coro_create (&(next->stack->cctx),
711	continue_coro, (void *)next,
712	next->stack->sptr, labs (next->stack->ssize));
713	}
714
715	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716	/* don't add any code here */
717	}
718
719	}
720	else if (next->tmps_ix == -2)
721	croak ("tried to transfer to running coroutine");
722	else
723	{
724	SAVE (prev, -1); /* first get rid of the old state */
725
726	if (flags & TRANSFER_SAVE_CCTXT)
727	{
728	if (!prev->stack)
729	allocate_stack (prev, 0);
730
731	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732	{
733	setup_coro (next);
734
735	prev->stack->refcnt++;
736	prev->stack->usecnt++;
737	next->stack = prev->stack;
738	next->gencnt = prev->gencnt;
739	}
740	else
741	{
742	allocate_stack (next, 1);
743	coro_create (&(next->stack->cctx),
744	setup_coro, (void *)next,
745	next->stack->sptr, labs (next->stack->ssize));
746	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
747	/* don't add any code here */
748	}
749	}
750	else
751	setup_coro (next);
752	}
753
754	/*
755	* xnext is now either prev or next, depending on wether
756	* we switched the c stack or not. that's why I use a global
757	* variable, that should become thread-specific at one point.
758	*/
759	xnext->cursp = stacklevel;
760	}
761
762	if (coro_mortal)	584	if (coro_mortal)
763	{	585	{
764	SvREFCNT_dec (coro_mortal);	586	SvREFCNT_dec (coro_mortal);
765	coro_mortal = 0;	587	coro_mortal = 0;
766	}	588	}
767	}	589	}
768		590
769	#define SV_CORO(sv,func) \	591	static void NOINLINE
770	do { \	592	prepare_cctx (coro_stack *cctx)
771	if (SvROK (sv)) \	593	{
772	sv = SvRV (sv); \	594	dSP;
773	\	595	LOGOP myop;
774	if (SvTYPE(sv) == SVt_PVHV) \
775	{ \
776	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
777	\
778	if (!he) \
779	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
780	\
781	(sv) = SvRV (HeVAL(he)); \
782	} \
783	\
784	/* must also be changed inside Coro::Cont::yield */ \
785	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
786	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
787	\
788	} while(0)
789		596
790	#define SvSTATE(sv) (struct coro *)SvIV (sv)	597	Zero (&myop, 1, LOGOP);
		598	myop.op_next = PL_op;
		599	myop.op_flags = OPf_WANT_VOID;
791		600
		601	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
		602
		603	PUSHMARK (SP);
		604	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
		605	PUTBACK;
		606	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		607	SPAGAIN;
		608	}
		609
		610	static void
		611	coro_run (void *arg)
		612	{
		613	/* coro_run is the alternative epilogue of transfer() */
		614	UNLOCK;
		615
		616	/*
		617	* this is a _very_ stripped down perl interpreter ;)
		618	*/
		619	PL_top_env = &PL_start_env;
		620	/* inject call to cctx_init */
		621	prepare_cctx ((coro_stack *)arg);
		622
		623	/* somebody will hit me for both perl_run and PL_restartop */
		624	perl_run (PL_curinterp);
		625
		626	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
		627	abort ();
		628	}
		629
		630	static coro_stack *
		631	stack_new ()
		632	{
		633	coro_stack *stack;
		634
		635	New (0, stack, 1, coro_stack);
		636
		637	#if HAVE_MMAP
		638
		639	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		640	/* mmap suppsedly does allocate-on-write for us */
		641	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		642
		643	if (stack->sptr == (void *)-1)
		644	{
		645	perror ("FATAL: unable to mmap stack for coroutine");
		646	_exit (EXIT_FAILURE);
		647	}
		648
		649	# if STACKGUARD
		650	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		651	# endif
		652
		653	#else
		654
		655	stack->ssize = STACKSIZE * (long)sizeof (long);
		656	New (0, stack->sptr, STACKSIZE, long);
		657
		658	if (!stack->sptr)
		659	{
		660	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		661	_exit (EXIT_FAILURE);
		662	}
		663
		664	#endif
		665
		666	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		667
		668	return stack;
		669	}
		670
		671	static void
		672	stack_free (coro_stack *stack)
		673	{
		674	if (!stack)
		675	return;
		676
		677	#if HAVE_MMAP
		678	munmap (stack->sptr, stack->ssize);
		679	#else
		680	Safefree (stack->sptr);
		681	#endif
		682
		683	Safefree (stack);
		684	}
		685
		686	static coro_stack *stack_first;
		687	static int cctx_count, cctx_idle;
		688
		689	static coro_stack *
		690	stack_get ()
		691	{
		692	coro_stack *stack;
		693
		694	if (stack_first)
		695	{
		696	--cctx_idle;
		697	stack = stack_first;
		698	stack_first = stack->next;
		699	}
		700	else
		701	{
		702	++cctx_count;
		703	stack = stack_new ();
		704	PL_op = PL_op->op_next;
		705	}
		706
		707	return stack;
		708	}
		709
		710	static void
		711	stack_put (coro_stack *stack)
		712	{
		713	++cctx_idle;
		714	stack->next = stack_first;
		715	stack_first = stack;
		716	}
		717
		718	/* never call directly, always through the coro_state_transfer global variable */
		719	static void NOINLINE
		720	transfer (struct coro *prev, struct coro *next, int flags)
		721	{
		722	dSTACKLEVEL;
		723
		724	/* sometimes transfer is only called to set idle_sp */
		725	if (flags == TRANSFER_SET_STACKLEVEL)
		726	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		727	else if (prev != next)
		728	{
		729	coro_stack *prev__stack;
		730
		731	LOCK;
		732
		733	if (next->mainstack)
		734	{
		735	/* coroutine already started */
		736	SAVE (prev, flags);
		737	LOAD (next);
		738	}
		739	else
		740	{
		741	/* need to start coroutine */
		742	/* first get rid of the old state */
		743	SAVE (prev, -1);
		744	/* setup coroutine call */
		745	setup_coro (next);
		746	/* need a stack */
		747	next->stack = 0;
		748	}
		749
		750	if (!prev->stack)
		751	/* create a new empty context */
		752	Newz (0, prev->stack, 1, coro_stack);
		753
		754	prev__stack = prev->stack;
		755
		756	/* possibly "free" the stack */
		757	if (prev__stack->idle_sp == STACKLEVEL)
		758	{
		759	stack_put (prev__stack);
		760	prev->stack = 0;
		761	}
		762
		763	if (!next->stack)
		764	next->stack = stack_get ();
		765
		766	if (prev__stack != next->stack)
		767	{
		768	prev__stack->top_env = PL_top_env;
		769	PL_top_env = next->stack->top_env;
		770	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		771	}
		772
		773	free_coro_mortal ();
		774
		775	UNLOCK;
		776	}
		777	}
		778
		779	struct transfer_args
		780	{
		781	struct coro *prev, *next;
		782	int flags;
		783	};
		784
		785	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		786
		787	static void
		788	coro_state_destroy (struct coro *coro)
		789	{
		790	if (coro->refcnt--)
		791	return;
		792
		793	if (coro->mainstack && coro->mainstack != main_mainstack)
		794	{
		795	struct coro temp;
		796
		797	SAVE ((&temp), TRANSFER_SAVE_ALL);
		798	LOAD (coro);
		799
		800	coro_destroy_stacks ();
		801
		802	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		803
		804	coro->mainstack = 0;
		805	}
		806
		807	stack_free (coro->stack);
		808	SvREFCNT_dec (coro->args);
		809	Safefree (coro);
		810	}
		811
792	static void	812	static int
		813	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		814	{
		815	struct coro *coro = (struct coro *)mg->mg_ptr;
		816	mg->mg_ptr = 0;
		817
		818	coro_state_destroy (coro);
		819
		820	return 0;
		821	}
		822
		823	static int
		824	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		825	{
		826	struct coro *coro = (struct coro *)mg->mg_ptr;
		827
		828	++coro->refcnt;
		829
		830	return 0;
		831	}
		832
		833	static MGVTBL coro_state_vtbl = {
		834	0, 0, 0, 0,
		835	coro_state_clear,
		836	0,
		837	#ifdef MGf_DUP
		838	coro_state_dup,
		839	#else
		840	# define MGf_DUP 0
		841	#endif
		842	};
		843
		844	static struct coro *
		845	SvSTATE (SV *coro)
		846	{
		847	HV *stash;
		848	MAGIC *mg;
		849
		850	if (SvROK (coro))
		851	coro = SvRV (coro);
		852
		853	stash = SvSTASH (coro);
		854	if (stash != coro_stash && stash != coro_state_stash)
		855	{
		856	/* very slow, but rare, check */
		857	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		858	croak ("Coro::State object required");
		859	}
		860
		861	mg = SvMAGIC (coro);
		862	assert (mg->mg_type == PERL_MAGIC_ext);
		863	return (struct coro *)mg->mg_ptr;
		864	}
		865
		866	static void
		867	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		868	{
		869	ta->prev = SvSTATE (prev);
		870	ta->next = SvSTATE (next);
		871	ta->flags = flags;
		872	}
		873
		874	static void
793	api_transfer(pTHX_ SV *prev, SV *next, int flags)	875	api_transfer (SV *prev, SV *next, int flags)
794	{	876	{
795	SV_CORO (prev, "Coro::transfer");	877	dTHX;
796	SV_CORO (next, "Coro::transfer");	878	struct transfer_args ta;
797		879
798	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	880	prepare_transfer (&ta, prev, next, flags);
		881	TRANSFER (ta);
799	}	882	}
800		883
801	/** Coro ********************************************************************/	884	/** Coro ********************************************************************/
802		885
803	#define PRIO_MAX 3	886	#define PRIO_MAX 3
…		…
807	#define PRIO_IDLE -3	890	#define PRIO_IDLE -3
808	#define PRIO_MIN -4	891	#define PRIO_MIN -4
809		892
810	/* for Coro.pm */	893	/* for Coro.pm */
811	static GV *coro_current, *coro_idle;	894	static GV *coro_current, *coro_idle;
812	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	895	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
813	static int coro_nready;	896	static int coro_nready;
814		897
815	static void	898	static void
816	coro_enq (SV *sv)	899	coro_enq (SV *sv)
817	{	900	{
		901	int prio;
		902
818	if (SvTYPE (sv) == SVt_PVHV)	903	if (SvTYPE (sv) != SVt_PVHV)
819	{
820	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
821	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
822
823	prio = prio > PRIO_MAX ? PRIO_MAX
824	: prio < PRIO_MIN ? PRIO_MIN
825	: prio;
826
827	av_push (coro_ready [prio - PRIO_MIN], sv);
828	coro_nready++;
829
830	return;
831	}
832
833	croak ("Coro::ready tried to enqueue something that is not a coroutine");	904	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		905
		906	prio = SvSTATE (sv)->prio;
		907
		908	av_push (coro_ready [prio - PRIO_MIN], sv);
		909	coro_nready++;
834	}	910	}
835		911
836	static SV *	912	static SV *
837	coro_deq (int min_prio)	913	coro_deq (int min_prio)
838	{	914	{
…		…
841	min_prio -= PRIO_MIN;	917	min_prio -= PRIO_MIN;
842	if (min_prio < 0)	918	if (min_prio < 0)
843	min_prio = 0;	919	min_prio = 0;
844		920
845	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	921	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
846	if (av_len (coro_ready[prio]) >= 0)	922	if (AvFILLp (coro_ready [prio]) >= 0)
847	{	923	{
848	coro_nready--;	924	coro_nready--;
849	return av_shift (coro_ready[prio]);	925	return av_shift (coro_ready [prio]);
850	}	926	}
851		927
852	return 0;	928	return 0;
853	}	929	}
854		930
855	static void	931	static void
856	api_ready (SV *coro)	932	api_ready (SV *coro)
857	{	933	{
		934	dTHX;
		935
858	if (SvROK (coro))	936	if (SvROK (coro))
859	coro = SvRV (coro);	937	coro = SvRV (coro);
860		938
		939	LOCK;
861	coro_enq (SvREFCNT_inc (coro));	940	coro_enq (SvREFCNT_inc (coro));
		941	UNLOCK;
		942	}
		943
		944	static void
		945	prepare_schedule (struct transfer_args *ta)
		946	{
		947	SV *current, *prev, *next;
		948
		949	current = GvSV (coro_current);
		950
		951	for (;;)
		952	{
		953	LOCK;
		954	next = coro_deq (PRIO_MIN);
		955	UNLOCK;
		956
		957	if (next)
		958	break;
		959
		960	{
		961	dSP;
		962
		963	ENTER;
		964	SAVETMPS;
		965
		966	PUSHMARK (SP);
		967	PUTBACK;
		968	call_sv (GvSV (coro_idle), G_DISCARD);
		969
		970	FREETMPS;
		971	LEAVE;
		972	}
		973	}
		974
		975	prev = SvRV (current);
		976	SvRV (current) = next;
		977
		978	/* free this only after the transfer */
		979	LOCK;
		980	free_coro_mortal ();
		981	UNLOCK;
		982	coro_mortal = prev;
		983
		984	ta->prev = SvSTATE (prev);
		985	ta->next = SvSTATE (next);
		986	ta->flags = TRANSFER_SAVE_ALL;
		987	}
		988
		989	static void
		990	prepare_cede (struct transfer_args *ta)
		991	{
		992	LOCK;
		993	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		994	UNLOCK;
		995
		996	prepare_schedule (ta);
862	}	997	}
863		998
864	static void	999	static void
865	api_schedule (void)	1000	api_schedule (void)
866	{	1001	{
867	SV *prev, *next;	1002	dTHX;
		1003	struct transfer_args ta;
868		1004
869	prev = SvRV (GvSV (coro_current));	1005	prepare_schedule (&ta);
870	next = coro_deq (PRIO_MIN);	1006	TRANSFER (ta);
871
872	if (!next)
873	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
874
875	/* free this only after the transfer */
876	coro_mortal = prev;
877	SV_CORO (prev, "Coro::schedule");
878
879	SvRV (GvSV (coro_current)) = next;
880
881	SV_CORO (next, "Coro::schedule");
882
883	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
884	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
885	}	1007	}
886		1008
887	static void	1009	static void
888	api_cede (void)	1010	api_cede (void)
889	{	1011	{
890	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1012	dTHX;
		1013	struct transfer_args ta;
891		1014
892	api_schedule ();	1015	prepare_cede (&ta);
		1016	TRANSFER (ta);
893	}	1017	}
894		1018
895	MODULE = Coro::State PACKAGE = Coro::State	1019	MODULE = Coro::State PACKAGE = Coro::State
896		1020
897	PROTOTYPES: ENABLE	1021	PROTOTYPES: DISABLE
898		1022
899	BOOT:	1023	BOOT:
900	{ /* {} necessary for stoopid perl-5.6.x */	1024	{
901	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1025	#ifdef USE_ITHREADS
902	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1026	MUTEX_INIT (&coro_mutex);
		1027	#endif
		1028	BOOT_PAGESIZE;
		1029
903	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1030	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
904		1031
905	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1032	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
906	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1033	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
907	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1034	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
908	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
909
910	if (!padlist_cache)
911	padlist_cache = newHV ();
912		1035
913	main_mainstack = PL_mainstack;	1036	main_mainstack = PL_mainstack;
914		1037
915	coroapi.ver = CORO_API_VERSION;	1038	coroapi.ver = CORO_API_VERSION;
916	coroapi.transfer = api_transfer;	1039	coroapi.transfer = api_transfer;
917	}
918		1040
919	Coro::State	1041	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
920	_newprocess(args)	1042	}
921	SV * args	1043
922	PROTOTYPE: $	1044	SV *
		1045	new (char *klass, ...)
923	CODE:	1046	CODE:
924	Coro__State coro;	1047	{
		1048	struct coro *coro;
		1049	HV *hv;
		1050	int i;
925		1051
926	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
927	croak ("Coro::State::_newprocess expects an arrayref");
928
929	New (0, coro, 1, struct coro);	1052	Newz (0, coro, 1, struct coro);
		1053	coro->args = newAV ();
930		1054
931	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1055	hv = newHV ();
		1056	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1057	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1058
		1059	for (i = 1; i < items; i++)
		1060	av_push (coro->args, newSVsv (ST (i)));
		1061
932	coro->mainstack = 0; /* actual work is done inside transfer */	1062	/*coro->mainstack = 0; *//*actual work is done inside transfer */
933	coro->stack = 0;	1063	/*coro->stack = 0;*/
934		1064	}
935	RETVAL = coro;
936	OUTPUT:	1065	OUTPUT:
937	RETVAL	1066	RETVAL
938		1067
939	void	1068	void
940	transfer(prev, next, flags)	1069	_set_stacklevel (...)
941	SV *prev	1070	ALIAS:
942	SV *next	1071	Coro::State::transfer = 1
943	int flags	1072	Coro::schedule = 2
944	PROTOTYPE: @	1073	Coro::cede = 3
		1074	Coro::Cont::yield = 4
945	CODE:	1075	CODE:
946	PUTBACK;	1076	{
947	SV_CORO (next, "Coro::transfer");	1077	struct transfer_args ta;
948	SV_CORO (prev, "Coro::transfer");	1078
949	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1079	switch (ix)
950	SPAGAIN;	1080	{
		1081	case 0:
		1082	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
		1083	ta.next = 0;
		1084	ta.flags = TRANSFER_SET_STACKLEVEL;
		1085	break;
		1086
		1087	case 1:
		1088	if (items != 3)
		1089	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1090
		1091	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1092	break;
		1093
		1094	case 2:
		1095	prepare_schedule (&ta);
		1096	break;
		1097
		1098	case 3:
		1099	prepare_cede (&ta);
		1100	break;
		1101
		1102	case 4:
		1103	{
		1104	SV *yieldstack;
		1105	SV *sv;
		1106	AV *defav = GvAV (PL_defgv);
		1107
		1108	yieldstack = *hv_fetch (
		1109	(HV *)SvRV (GvSV (coro_current)),
		1110	"yieldstack", sizeof ("yieldstack") - 1,
		1111	0
		1112	);
		1113
		1114	/* set up @_ -- ugly */
		1115	av_clear (defav);
		1116	av_fill (defav, items - 1);
		1117	while (items--)
		1118	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1119
		1120	sv = av_pop ((AV *)SvRV (yieldstack));
		1121	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1122	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1123	ta.flags = 0;
		1124	SvREFCNT_dec (sv);
		1125	}
		1126	break;
		1127
		1128	}
		1129
		1130	TRANSFER (ta);
		1131	}
951		1132
952	void	1133	void
953	DESTROY(coro)	1134	_clone_state_from (SV *dst, SV *src)
954	Coro::State coro	1135	CODE:
955	CODE:	1136	{
		1137	struct coro *coro_src = SvSTATE (src);
956		1138
957	if (coro->mainstack && coro->mainstack != main_mainstack)	1139	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
958	{
959	struct coro temp;
960		1140
961	PUTBACK;	1141	++coro_src->refcnt;
962	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1142	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
963	LOAD(aTHX_ coro);	1143	}
964	SPAGAIN;
965
966	destroy_stacks (aTHX);
967
968	LOAD((&temp)); /* this will get rid of defsv etc.. */
969	SPAGAIN;
970
971	coro->mainstack = 0;
972	}
973
974	deallocate_stack (coro);
975
976	Safefree (coro);
977		1144
978	void	1145	void
979	flush()
980	CODE:
981	#ifdef MAY_FLUSH
982	flush_padlist_cache ();
983	#endif
984
985	void
986	_exit(code)	1146	_exit (code)
987	int code	1147	int code
988	PROTOTYPE: $	1148	PROTOTYPE: $
989	CODE:	1149	CODE:
990	#if defined(__GLIBC__) || _POSIX_C_SOURCE
991	_exit (code);	1150	_exit (code);
992	#else
993	signal (SIGTERM, SIG_DFL);
994	raise (SIGTERM);
995	exit (code);
996	#endif
997
998	MODULE = Coro::State PACKAGE = Coro::Cont
999
1000	# this is slightly dirty (should expose a c-level api)
1001
1002	void
1003	yield(...)
1004	PROTOTYPE: @
1005	CODE:
1006	static SV *returnstk;
1007	SV *sv;
1008	AV *defav = GvAV (PL_defgv);
1009	struct coro *prev, *next;
1010
1011	if (!returnstk)
1012	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1013
1014	/* set up @_ -- ugly */
1015	av_clear (defav);
1016	av_fill (defav, items - 1);
1017	while (items--)
1018	av_store (defav, items, SvREFCNT_inc (ST(items)));
1019
1020	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1021	sv = av_pop ((AV *)SvRV (returnstk));
1022	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1023	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1024	SvREFCNT_dec (sv);
1025
1026	transfer(aTHX_ prev, next, 0);
1027		1151
1028	MODULE = Coro::State PACKAGE = Coro	1152	MODULE = Coro::State PACKAGE = Coro
1029		1153
1030	# this is slightly dirty (should expose a c-level api)
1031
1032	BOOT:	1154	BOOT:
1033	{	1155	{
1034	int i;	1156	int i;
		1157
1035	HV *stash = gv_stashpv ("Coro", TRUE);	1158	coro_stash = gv_stashpv ("Coro", TRUE);
1036		1159
1037	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1160	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1038	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1161	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1039	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1162	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1040	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1163	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1041	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1164	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1042	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1165	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1043		1166
1044	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1167	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1045	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1168	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1046		1169
1047	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1170	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1055	coroapi.ready = api_ready;	1178	coroapi.ready = api_ready;
1056	coroapi.nready = &coro_nready;	1179	coroapi.nready = &coro_nready;
1057	coroapi.current = coro_current;	1180	coroapi.current = coro_current;
1058		1181
1059	GCoroAPI = &coroapi;	1182	GCoroAPI = &coroapi;
1060	sv_setiv(sv, (IV)&coroapi);	1183	sv_setiv (sv, (IV)&coroapi);
1061	SvREADONLY_on(sv);	1184	SvREADONLY_on (sv);
1062	}	1185	}
1063	}	1186	}
1064		1187
		1188	int
		1189	prio (Coro::State coro, int newprio = 0)
		1190	ALIAS:
		1191	nice = 1
		1192	CODE:
		1193	{
		1194	RETVAL = coro->prio;
		1195
		1196	if (items > 1)
		1197	{
		1198	if (ix)
		1199	newprio += coro->prio;
		1200
		1201	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1202	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1203
		1204	coro->prio = newprio;
		1205	}
		1206	}
		1207
1065	void	1208	void
1066	ready(self)	1209	ready (SV *self)
1067	SV * self
1068	PROTOTYPE: $	1210	PROTOTYPE: $
1069	CODE:	1211	CODE:
1070	api_ready (self);	1212	api_ready (self);
1071		1213
1072	int	1214	int
1073	nready(...)	1215	nready (...)
1074	PROTOTYPE:	1216	PROTOTYPE:
1075	CODE:	1217	CODE:
1076	RETVAL = coro_nready;	1218	RETVAL = coro_nready;
1077	OUTPUT:	1219	OUTPUT:
1078	RETVAL	1220	RETVAL
1079		1221
		1222	MODULE = Coro::State PACKAGE = Coro::AIO
		1223
		1224	SV *
		1225	_get_state ()
		1226	CODE:
		1227	{
		1228	struct {
		1229	int errorno;
		1230	int laststype;
		1231	int laststatval;
		1232	Stat_t statcache;
		1233	} data;
		1234
		1235	data.errorno = errno;
		1236	data.laststype = PL_laststype;
		1237	data.laststatval = PL_laststatval;
		1238	data.statcache = PL_statcache;
		1239
		1240	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1241	}
		1242	OUTPUT:
		1243	RETVAL
		1244
1080	void	1245	void
1081	schedule(...)	1246	_set_state (char *data_)
1082	PROTOTYPE:	1247	PROTOTYPE: $
1083	CODE:	1248	CODE:
1084	api_schedule ();	1249	{
		1250	struct {
		1251	int errorno;
		1252	int laststype;
		1253	int laststatval;
		1254	Stat_t statcache;
		1255	} *data = (void *)data_;
1085		1256
1086	void	1257	errno = data->errorno;
1087	cede(...)	1258	PL_laststype = data->laststype;
1088	PROTOTYPE:	1259	PL_laststatval = data->laststatval;
1089	CODE:	1260	PL_statcache = data->statcache;
1090	api_cede ();	1261	}
1091

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