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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.70 by root, Mon Dec 26 19:26:52 2005 UTC vs.
Revision 1.108 by root, Mon Nov 27 18:15:47 2006 UTC

1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	#if PERL_VERSION < 6	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)
12	# ifndef PL_ppaddr	20	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	21	# define PL_ppaddr ppaddr
14	# endif	22	# endif
15	# ifndef call_sv	23	# ifndef call_sv
16	# define call_sv perl_call_sv	24	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	35	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	36	# define IS_PADCONST(v) 0
29	# endif	37	# endif
30	#endif	38	#endif
31		39
		40	#include <stdio.h>
32	#include <errno.h>	41	#include <errno.h>
33	#include <signal.h>	42
		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
34		50
35	#ifdef HAVE_MMAP	51	#ifdef HAVE_MMAP
36	# include <unistd.h>	52	# include <unistd.h>
37	# include <sys/mman.h>	53	# include <sys/mman.h>
38	# ifndef MAP_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
…		…
40	# define MAP_ANONYMOUS MAP_ANON	56	# define MAP_ANONYMOUS MAP_ANON
41	# else	57	# else
42	# undef HAVE_MMAP	58	# undef HAVE_MMAP
43	# endif	59	# endif
44	# endif	60	# endif
		61	# include <limits.h>
		62	# ifndef PAGESIZE
		63	# define PAGESIZE pagesize
		64	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		65	static long pagesize;
		66	# else
		67	# define BOOT_PAGESIZE (void)0
45	#endif	68	# endif
46		69	#else
47	#define SUB_INIT "Coro::State::initialize"	70	# define PAGESIZE 0
48	#define UCORO_STATE "_coro_state"	71	# define BOOT_PAGESIZE (void)0
		72	#endif
49		73
50	/* The next macro should declare a variable stacklevel that contains and approximation	74	/* The next macro should declare a variable stacklevel that contains and approximation
51	* to the current C stack pointer. Its property is that it changes with each call	75	* to the current C stack pointer. Its property is that it changes with each call
52	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
53	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
54		79
55	#define IN_DESTRUCT (PL_main_cv == Nullcv)	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
56		81
57	#define labs(l) ((l) >= 0 ? (l) : -(l))	82	#if __GNUC__ >= 3
		83	# define attribute(x) __attribute__(x)
		84	#else
		85	# define attribute(x)
		86	#endif
		87
		88	#define NOINLINE attribute ((noinline))
58		89
59	#include "CoroAPI.h"	90	#include "CoroAPI.h"
		91
		92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
60		93
61	#ifdef USE_ITHREADS	94	#ifdef USE_ITHREADS
62	static perl_mutex coro_mutex;	95	static perl_mutex coro_mutex;
63	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
64	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
67	# define UNLOCK (void)0	100	# define UNLOCK (void)0
68	#endif	101	#endif
69		102
70	static struct CoroAPI coroapi;	103	static struct CoroAPI coroapi;
71	static AV *main_mainstack; /* used to differentiate between $main and others */	104	static AV *main_mainstack; /* used to differentiate between $main and others */
72	static HV *coro_state_stash;	105	static HV *coro_state_stash, *coro_stash;
73	static SV *ucoro_state_sv;
74	static U32 ucoro_state_hash;
75	static SV *coro_mortal; /* will be freed after next transfer */	106	static SV *coro_mortal; /* will be freed after next transfer */
76		107
77	/* this is actually not only the c stack but also c registers etc... */	108	static struct coro_cctx *cctx_first;
		109	static int cctx_count, cctx_idle;
		110
		111	/* this is a structure representing a c-level coroutine */
78	typedef struct {	112	typedef struct coro_cctx {
79	int refcnt; /* pointer reference counter */	113	struct coro_cctx *next;
80	int usecnt; /* shared by how many coroutines */
81	int gencnt; /* generation counter */
82		114
83	coro_context cctx;	115	/* the stack */
84
85	void *sptr;	116	void *sptr;
86	long ssize; /* positive == mmap, otherwise malloc */	117	long ssize; /* positive == mmap, otherwise malloc */
87	} coro_stack;
88		118
		119	/* cpu state */
		120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		121	JMPENV *top_env;
		122	coro_context cctx;
		123
		124	#if USE_VALGRIND
		125	int valgrind_id;
		126	#endif
		127	} coro_cctx;
		128
		129	/* this is a structure representing a perl-level coroutine */
89	struct coro {	130	struct coro {
90	/* the top-level JMPENV for each coroutine, needed to catch dies. */	131	/* the c coroutine allocated to this perl coroutine, if any */
91	JMPENV start_env;	132	coro_cctx *cctx;
92		133
93	/* the optional C context */	134	/* data associated with this coroutine (initial args) */
94	coro_stack *stack;	135	AV *args;
95	void *cursp;
96	int gencnt;	136	int refcnt;
97		137
98	/* optionally saved, might be zero */	138	/* optionally saved, might be zero */
99	AV *defav;	139	AV *defav;
100	SV *defsv;	140	SV *defsv;
101	SV *errsv;	141	SV *errsv;
102		142
103	/* saved global state not related to stacks */	143	#define VAR(name,type) type name;
104	U8 dowarn;	144	# include "state.h"
105	I32 in_eval;	145	#undef VAR
106		146
107	/* the stacks and related info (callchain etc..) */	147	/* coro process data */
108	PERL_SI *curstackinfo;	148	int prio;
109	AV *curstack;
110	AV *mainstack;
111	SV **stack_sp;
112	OP *op;
113	SV **curpad;
114	AV *comppad;
115	CV *compcv;
116	SV **stack_base;
117	SV **stack_max;
118	SV **tmps_stack;
119	I32 tmps_floor;
120	I32 tmps_ix;
121	I32 tmps_max;
122	I32 *markstack;
123	I32 *markstack_ptr;
124	I32 *markstack_max;
125	I32 *scopestack;
126	I32 scopestack_ix;
127	I32 scopestack_max;
128	ANY *savestack;
129	I32 savestack_ix;
130	I32 savestack_max;
131	OP **retstack;
132	I32 retstack_ix;
133	I32 retstack_max;
134	PMOP *curpm;
135	COP *curcop;
136	JMPENV *top_env;
137
138	/* data associated with this coroutine (initial args) */
139	AV *args;
140	};	149	};
141		150
142	typedef struct coro *Coro__State;	151	typedef struct coro *Coro__State;
143	typedef struct coro *Coro__State_or_hashref;	152	typedef struct coro *Coro__State_or_hashref;
144		153
145	/* mostly copied from op.c:cv_clone2 */	154	static AV *
146	STATIC AV *	155	coro_clone_padlist (CV *cv)
147	clone_padlist (pTHX_ AV *protopadlist)
148	{	156	{
149	AV *av;	157	AV *padlist = CvPADLIST (cv);
150	I32 ix;
151	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
152	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
153	SV **pname = AvARRAY (protopad_name);
154	SV **ppad = AvARRAY (protopad);
155	I32 fname = AvFILLp (protopad_name);
156	I32 fpad = AvFILLp (protopad);
157	AV *newpadlist, *newpad_name, *newpad;	158	AV *newpadlist, *newpad;
158	SV **npad;
159
160	newpad_name = newAV ();
161	for (ix = fname; ix >= 0; ix--)
162	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
163
164	newpad = newAV ();
165	av_fill (newpad, AvFILLp (protopad));
166	npad = AvARRAY (newpad);
167		159
168	newpadlist = newAV ();	160	newpadlist = newAV ();
169	AvREAL_off (newpadlist);	161	AvREAL_off (newpadlist);
170	av_store (newpadlist, 0, (SV *) newpad_name);	162	#if PERL_VERSION_ATLEAST (5,9,0)
		163	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		164	#else
		165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		166	#endif
		167	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		168	--AvFILLp (padlist);
		169
		170	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
171	av_store (newpadlist, 1, (SV *) newpad);	171	av_store (newpadlist, 1, (SV *)newpad);
172
173	av = newAV (); /* will be @_ */
174	av_extend (av, 0);
175	av_store (newpad, 0, (SV *) av);
176	AvFLAGS (av) = AVf_REIFY;
177
178	for (ix = fpad; ix > 0; ix--)
179	{
180	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
181
182	if (namesv && namesv != &PL_sv_undef)
183	{
184	char *name = SvPVX (namesv); /* XXX */
185
186	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
187	{ /* lexical from outside? */
188	npad[ix] = SvREFCNT_inc (ppad[ix]);
189	}
190	else
191	{ /* our own lexical */
192	SV *sv;
193	if (*name == '&')
194	sv = SvREFCNT_inc (ppad[ix]);
195	else if (*name == '@')
196	sv = (SV *) newAV ();
197	else if (*name == '%')
198	sv = (SV *) newHV ();
199	else
200	sv = NEWSV (0, 0);
201
202	#ifdef SvPADBUSY
203	if (!SvPADBUSY (sv))
204	#endif
205	SvPADMY_on (sv);
206
207	npad[ix] = sv;
208	}
209	}
210	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
211	{
212	npad[ix] = SvREFCNT_inc (ppad[ix]);
213	}
214	else
215	{
216	SV *sv = NEWSV (0, 0);
217	SvPADTMP_on (sv);
218	npad[ix] = sv;
219	}
220	}
221
222	#if 0 /* return -ENOTUNDERSTOOD */
223	/* Now that vars are all in place, clone nested closures. */
224
225	for (ix = fpad; ix > 0; ix--) {
226	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
227	if (namesv
228	&& namesv != &PL_sv_undef
229	&& !(SvFLAGS(namesv) & SVf_FAKE)
230	&& *SvPVX(namesv) == '&'
231	&& CvCLONE(ppad[ix]))
232	{
233	CV *kid = cv_clone((CV*)ppad[ix]);
234	SvREFCNT_dec(ppad[ix]);
235	CvCLONE_on(kid);
236	SvPADMY_on(kid);
237	npad[ix] = (SV*)kid;
238	}
239	}
240	#endif
241		172
242	return newpadlist;	173	return newpadlist;
243	}	174	}
244		175
245	STATIC void	176	static void
246	free_padlist (pTHX_ AV *padlist)	177	free_padlist (AV *padlist)
247	{	178	{
248	/* may be during global destruction */	179	/* may be during global destruction */
249	if (SvREFCNT (padlist))	180	if (SvREFCNT (padlist))
250	{	181	{
251	I32 i = AvFILLp (padlist);	182	I32 i = AvFILLp (padlist);
…		…
264		195
265	SvREFCNT_dec ((SV*)padlist);	196	SvREFCNT_dec ((SV*)padlist);
266	}	197	}
267	}	198	}
268		199
269	STATIC int	200	static int
270	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	201	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
271	{	202	{
272	AV *padlist;	203	AV *padlist;
273	AV *av = (AV *)mg->mg_obj;	204	AV *av = (AV *)mg->mg_obj;
274		205
275	/* casting is fun. */	206	/* casting is fun. */
276	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	207	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
277	free_padlist (aTHX_ padlist);	208	free_padlist (padlist);
278		209
279	SvREFCNT_dec (av);	210	SvREFCNT_dec (av);
		211
		212	return 0;
280	}	213	}
281		214
282	#define PERL_MAGIC_coro PERL_MAGIC_ext	215	#define PERL_MAGIC_coro PERL_MAGIC_ext
283		216
284	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	217	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
285		218
286	/* the next two functions merely cache the padlists */	219	/* the next two functions merely cache the padlists */
287	STATIC void	220	static void
288	get_padlist (pTHX_ CV *cv)	221	get_padlist (CV *cv)
289	{	222	{
290	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	223	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
291		224
292	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	225	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
293	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	226	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
294	else	227	else
		228	{
		229	#if 0
		230	/* this is probably cleaner, but also slower? */
		231	CV *cp = Perl_cv_clone (cv);
		232	CvPADLIST (cv) = CvPADLIST (cp);
		233	CvPADLIST (cp) = 0;
		234	SvREFCNT_dec (cp);
		235	#else
295	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	236	CvPADLIST (cv) = coro_clone_padlist (cv);
		237	#endif
		238	}
296	}	239	}
297		240
298	STATIC void	241	static void
299	put_padlist (pTHX_ CV *cv)	242	put_padlist (CV *cv)
300	{	243	{
301	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	244	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
302		245
303	if (!mg)	246	if (!mg)
304	{	247	{
…		…
312	}	255	}
313		256
314	#define SB do {	257	#define SB do {
315	#define SE } while (0)	258	#define SE } while (0)
316		259
317	#define LOAD(state) load_state(aTHX_ (state));	260	#define LOAD(state) load_state((state));
318	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	261	#define SAVE(state,flags) save_state((state),(flags));
319		262
320	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	263	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
321		264
322	static void	265	static void
323	load_state(pTHX_ Coro__State c)	266	load_state(Coro__State c)
324	{	267	{
325	PL_dowarn = c->dowarn;	268	#define VAR(name,type) PL_ ## name = c->name;
326	PL_in_eval = c->in_eval;	269	# include "state.h"
327		270	#undef VAR
328	PL_curstackinfo = c->curstackinfo;
329	PL_curstack = c->curstack;
330	PL_mainstack = c->mainstack;
331	PL_stack_sp = c->stack_sp;
332	PL_op = c->op;
333	PL_curpad = c->curpad;
334	PL_comppad = c->comppad;
335	PL_compcv = c->compcv;
336	PL_stack_base = c->stack_base;
337	PL_stack_max = c->stack_max;
338	PL_tmps_stack = c->tmps_stack;
339	PL_tmps_floor = c->tmps_floor;
340	PL_tmps_ix = c->tmps_ix;
341	PL_tmps_max = c->tmps_max;
342	PL_markstack = c->markstack;
343	PL_markstack_ptr = c->markstack_ptr;
344	PL_markstack_max = c->markstack_max;
345	PL_scopestack = c->scopestack;
346	PL_scopestack_ix = c->scopestack_ix;
347	PL_scopestack_max = c->scopestack_max;
348	PL_savestack = c->savestack;
349	PL_savestack_ix = c->savestack_ix;
350	PL_savestack_max = c->savestack_max;
351	PL_retstack = c->retstack;
352	PL_retstack_ix = c->retstack_ix;
353	PL_retstack_max = c->retstack_max;
354	PL_curpm = c->curpm;
355	PL_curcop = c->curcop;
356	PL_top_env = c->top_env;
357		271
358	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	272	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
359	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	273	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
360	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	274	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
361		275
…		…
368	{	282	{
369	AV *padlist = (AV *)POPs;	283	AV *padlist = (AV *)POPs;
370		284
371	if (padlist)	285	if (padlist)
372	{	286	{
373	put_padlist (aTHX_ cv); /* mark this padlist as available */	287	put_padlist (cv); /* mark this padlist as available */
374	CvPADLIST(cv) = padlist;	288	CvPADLIST(cv) = padlist;
375	}	289	}
376		290
377	++CvDEPTH(cv);	291	++CvDEPTH(cv);
378	}	292	}
…		…
380	PUTBACK;	294	PUTBACK;
381	}	295	}
382	}	296	}
383		297
384	static void	298	static void
385	save_state(pTHX_ Coro__State c, int flags)	299	save_state(Coro__State c, int flags)
386	{	300	{
387	{	301	{
388	dSP;	302	dSP;
389	I32 cxix = cxstack_ix;	303	I32 cxix = cxstack_ix;
390	PERL_CONTEXT *ccstk = cxstack;	304	PERL_CONTEXT *ccstk = cxstack;
…		…
418	}	332	}
419		333
420	PUSHs ((SV *)CvPADLIST(cv));	334	PUSHs ((SV *)CvPADLIST(cv));
421	PUSHs ((SV *)cv);	335	PUSHs ((SV *)cv);
422		336
423	get_padlist (aTHX_ cv); /* this is a monster */	337	get_padlist (cv);
424	}	338	}
425	}	339	}
426	#ifdef CXt_FORMAT	340	#ifdef CXt_FORMAT
427	else if (CxTYPE(cx) == CXt_FORMAT)	341	else if (CxTYPE(cx) == CXt_FORMAT)
428	{	342	{
…		…
446		360
447	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	361	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
448	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	362	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
449	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	363	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
450		364
451	c->dowarn = PL_dowarn;	365	#define VAR(name,type)c->name = PL_ ## name;
452	c->in_eval = PL_in_eval;	366	# include "state.h"
453		367	#undef VAR
454	c->curstackinfo = PL_curstackinfo;
455	c->curstack = PL_curstack;
456	c->mainstack = PL_mainstack;
457	c->stack_sp = PL_stack_sp;
458	c->op = PL_op;
459	c->curpad = PL_curpad;
460	c->comppad = PL_comppad;
461	c->compcv = PL_compcv;
462	c->stack_base = PL_stack_base;
463	c->stack_max = PL_stack_max;
464	c->tmps_stack = PL_tmps_stack;
465	c->tmps_floor = PL_tmps_floor;
466	c->tmps_ix = PL_tmps_ix;
467	c->tmps_max = PL_tmps_max;
468	c->markstack = PL_markstack;
469	c->markstack_ptr = PL_markstack_ptr;
470	c->markstack_max = PL_markstack_max;
471	c->scopestack = PL_scopestack;
472	c->scopestack_ix = PL_scopestack_ix;
473	c->scopestack_max = PL_scopestack_max;
474	c->savestack = PL_savestack;
475	c->savestack_ix = PL_savestack_ix;
476	c->savestack_max = PL_savestack_max;
477	c->retstack = PL_retstack;
478	c->retstack_ix = PL_retstack_ix;
479	c->retstack_max = PL_retstack_max;
480	c->curpm = PL_curpm;
481	c->curcop = PL_curcop;
482	c->top_env = PL_top_env;
483	}	368	}
484		369
485	/*	370	/*
486	* allocate various perl stacks. This is an exact copy	371	* allocate various perl stacks. This is an exact copy
487	* of perl.c:init_stacks, except that it uses less memory	372	* of perl.c:init_stacks, except that it uses less memory
488	* on the (sometimes correct) assumption that coroutines do	373	* on the (sometimes correct) assumption that coroutines do
489	* not usually need a lot of stackspace.	374	* not usually need a lot of stackspace.
490	*/	375	*/
491	STATIC void	376	static void
492	coro_init_stacks (pTHX)	377	coro_init_stacks ()
493	{	378	{
494	LOCK;
495
496	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	379	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
497	PL_curstackinfo->si_type = PERLSI_MAIN;	380	PL_curstackinfo->si_type = PERLSI_MAIN;
498	PL_curstack = PL_curstackinfo->si_stack;	381	PL_curstack = PL_curstackinfo->si_stack;
499	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	382	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
500		383
…		…
521		404
522	New(54,PL_savestack,96,ANY);	405	New(54,PL_savestack,96,ANY);
523	PL_savestack_ix = 0;	406	PL_savestack_ix = 0;
524	PL_savestack_max = 96;	407	PL_savestack_max = 96;
525		408
		409	#if !PERL_VERSION_ATLEAST (5,9,0)
526	New(54,PL_retstack,8,OP*);	410	New(54,PL_retstack,8,OP*);
527	PL_retstack_ix = 0;	411	PL_retstack_ix = 0;
528	PL_retstack_max = 8;	412	PL_retstack_max = 8;
529		413	#endif
530	UNLOCK;
531	}	414	}
532		415
533	/*	416	/*
534	* destroy the stacks, the callchain etc...	417	* destroy the stacks, the callchain etc...
535	*/	418	*/
536	STATIC void	419	static void
537	destroy_stacks(pTHX)	420	coro_destroy_stacks ()
538	{	421	{
539	if (!IN_DESTRUCT)	422	if (!IN_DESTRUCT)
540	{	423	{
541	/* is this ugly, I ask? */	424	/* is this ugly, I ask? */
542	LEAVE_SCOPE (0);	425	LEAVE_SCOPE (0);
…		…
573		456
574	Safefree (PL_tmps_stack);	457	Safefree (PL_tmps_stack);
575	Safefree (PL_markstack);	458	Safefree (PL_markstack);
576	Safefree (PL_scopestack);	459	Safefree (PL_scopestack);
577	Safefree (PL_savestack);	460	Safefree (PL_savestack);
		461	#if !PERL_VERSION_ATLEAST (5,9,0)
578	Safefree (PL_retstack);	462	Safefree (PL_retstack);
579	}
580
581	static void
582	allocate_stack (Coro__State ctx, int alloc)
583	{
584	coro_stack *stack;
585
586	New (0, stack, 1, coro_stack);
587
588	stack->refcnt = 1;
589	stack->usecnt = 1;
590	stack->gencnt = ctx->gencnt = 0;
591
592	if (alloc)
593	{
594	#if HAVE_MMAP
595	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
596	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
597	if (stack->sptr == (void *)-1)
598	#endif	463	#endif
599	{
600	/*FIXME*//*D*//* reasonable stack size! */
601	stack->ssize = - (STACKSIZE * sizeof (long));
602	New (0, stack->sptr, STACKSIZE, long);
603	}
604	}
605	else
606	stack->sptr = 0;
607
608	ctx->stack = stack;
609	}	464	}
610		465
611	static void	466	static void
612	deallocate_stack (Coro__State ctx)	467	setup_coro (struct coro *coro)
613	{
614	coro_stack *stack = ctx->stack;
615
616	ctx->stack = 0;
617
618	if (stack)
619	{
620	if (!--stack->refcnt)
621	{
622	#ifdef HAVE_MMAP
623	if (stack->ssize > 0 && stack->sptr)
624	munmap (stack->sptr, stack->ssize);
625	else
626	#endif
627	Safefree (stack->sptr);
628
629	Safefree (stack);
630	}
631	else if (ctx->gencnt == stack->gencnt)
632	--stack->usecnt;
633	}
634	}
635
636	static void
637	setup_coro (void *arg)
638	{	468	{
639	/*	469	/*
640	* emulate part of the perl startup here.	470	* emulate part of the perl startup here.
641	*/	471	*/
642	dTHX;
643	dSP;
644	Coro__State ctx = (Coro__State)arg;
645	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
646		472
647	coro_init_stacks (aTHX);	473	coro_init_stacks ();
		474
648	/*PL_curcop = 0;*/	475	PL_curcop = 0;
649	/*PL_in_eval = PL_in_eval;*/ /* inherit */	476	PL_in_eval = 0;
		477	PL_curpm = 0;
		478
		479	{
		480	dSP;
		481	LOGOP myop;
		482
		483	/* I have no idea why this is needed, but it is */
		484	PUSHMARK (SP);
		485
650	SvREFCNT_dec (GvAV (PL_defgv));	486	SvREFCNT_dec (GvAV (PL_defgv));
651	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	487	GvAV (PL_defgv) = coro->args; coro->args = 0;
652		488
653	SPAGAIN;
654
655	if (ctx->stack)
656	{
657	ctx->cursp = 0;
658
659	PUSHMARK(SP);
660	PUTBACK;
661	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
662
663	if (SvTRUE (ERRSV))
664	croak (NULL);
665	else
666	croak ("FATAL: CCTXT coroutine returned!");
667	}
668	else
669	{
670	UNOP myop;
671
672	PL_op = (OP *)&myop;
673
674	Zero(&myop, 1, UNOP);	489	Zero (&myop, 1, LOGOP);
675	myop.op_next = Nullop;	490	myop.op_next = Nullop;
676	myop.op_flags = OPf_WANT_VOID;	491	myop.op_flags = OPf_WANT_VOID;
677		492
		493	PL_op = (OP *)&myop;
		494
678	PUSHMARK(SP);	495	PUSHMARK (SP);
679	XPUSHs (sub_init);	496	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
680	/*
681	* the next line is slightly wrong, as PL_op->op_next
682	* is actually being executed so we skip the first op.
683	* that doesn't matter, though, since it is only
684	* pp_nextstate and we never return...
685	* ah yes, and I don't care anyways ;)
686	*/
687	PUTBACK;	497	PUTBACK;
688	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	498	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
689	SPAGAIN;	499	SPAGAIN;
690		500
691	ENTER; /* necessary e.g. for dounwind */	501	ENTER; /* necessary e.g. for dounwind */
692	}	502	}
693	}	503	}
694		504
695	static void	505	static void
696	continue_coro (void *arg)	506	free_coro_mortal ()
697	{	507	{
698	/*
699	* this is a _very_ stripped down perl interpreter ;)
700	*/
701	dTHX;
702	Coro__State ctx = (Coro__State)arg;
703	JMPENV coro_start_env;
704
705	PL_top_env = &ctx->start_env;
706
707	ctx->cursp = 0;
708	PL_op = PL_op->op_next;
709	CALLRUNOPS(aTHX);
710
711	abort ();
712	}
713
714	STATIC void
715	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
716	{
717	dSTACKLEVEL;
718
719	if (prev != next)
720	{
721	if (next->mainstack)
722	{
723	LOCK;
724	SAVE (prev, flags);
725	LOAD (next);
726	UNLOCK;
727
728	/* mark this state as in-use */
729	next->mainstack = 0;
730	next->tmps_ix = -2;
731
732	/* stacklevel changed? if yes, grab the stack for us! */
733	if (flags & TRANSFER_SAVE_CCTXT)
734	{
735	if (!prev->stack)
736	allocate_stack (prev, 0);
737	else if (prev->cursp != stacklevel
738	&& prev->stack->usecnt > 1)
739	{
740	prev->gencnt = ++prev->stack->gencnt;
741	prev->stack->usecnt = 1;
742	}
743
744	/* has our stack been invalidated? */
745	if (next->stack && next->stack->gencnt != next->gencnt)
746	{
747	deallocate_stack (next);
748	allocate_stack (next, 1);
749	coro_create (&(next->stack->cctx),
750	continue_coro, (void *)next,
751	next->stack->sptr, labs (next->stack->ssize));
752	}
753
754	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755	prev->cursp = stacklevel;
756	/* don't add any code here */
757	}
758	else
759	next->cursp = stacklevel;
760	}
761	else if (next->tmps_ix == -2)
762	croak ("tried to transfer to running coroutine");
763	else
764	{
765	LOCK;
766	SAVE (prev, -1); /* first get rid of the old state */
767	UNLOCK;
768
769	if (flags & TRANSFER_SAVE_CCTXT)
770	{
771	if (!prev->stack)
772	allocate_stack (prev, 0);
773
774	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
775	{
776	PL_top_env = &next->start_env;
777
778	setup_coro (next);
779	next->cursp = stacklevel;
780
781	prev->stack->refcnt++;
782	prev->stack->usecnt++;
783	next->stack = prev->stack;
784	next->gencnt = prev->gencnt;
785	}
786	else
787	{
788	assert (!next->stack);
789	allocate_stack (next, 1);
790	coro_create (&(next->stack->cctx),
791	setup_coro, (void *)next,
792	next->stack->sptr, labs (next->stack->ssize));
793	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
794	prev->cursp = stacklevel;
795	/* don't add any code here */
796	}
797	}
798	else
799	{
800	setup_coro (next);
801	next->cursp = stacklevel;
802	}
803	}
804	}
805
806	LOCK;
807	if (coro_mortal)	508	if (coro_mortal)
808	{	509	{
809	SvREFCNT_dec (coro_mortal);	510	SvREFCNT_dec (coro_mortal);
810	coro_mortal = 0;	511	coro_mortal = 0;
811	}	512	}
		513	}
		514
		515	static void NOINLINE
		516	prepare_cctx (coro_cctx *cctx)
		517	{
		518	dSP;
		519	LOGOP myop;
		520
		521	Zero (&myop, 1, LOGOP);
		522	myop.op_next = PL_op;
		523	myop.op_flags = OPf_WANT_VOID;
		524
		525	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		526
		527	PUSHMARK (SP);
		528	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		529	PUTBACK;
		530	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		531	SPAGAIN;
		532	}
		533
		534	static void
		535	coro_run (void *arg)
		536	{
		537	/* coro_run is the alternative epilogue of transfer() */
812	UNLOCK;	538	UNLOCK;
813	}
814		539
815	#define SV_CORO(sv,func) \	540	/*
816	do { \	541	* this is a _very_ stripped down perl interpreter ;)
817	if (SvROK (sv)) \	542	*/
818	sv = SvRV (sv); \	543	PL_top_env = &PL_start_env;
819	\
820	if (SvTYPE (sv) == SVt_PVHV) \
821	{ \
822	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
823	\
824	if (!he) \
825	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
826	\
827	(sv) = SvRV (HeVAL(he)); \
828	} \
829	\
830	/* must also be changed inside Coro::Cont::yield */ \
831	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
832	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
833	\
834	} while(0)
835		544
836	#define SvSTATE(sv) (struct coro *)SvIV (sv)	545	/* inject call to cctx_init */
		546	prepare_cctx ((coro_cctx *)arg);
837		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	}
		554
		555	static coro_cctx *
		556	cctx_new ()
		557	{
		558	coro_cctx *cctx;
		559
		560	++cctx_count;
		561
		562	New (0, cctx, 1, coro_cctx);
		563
		564	#if HAVE_MMAP
		565
		566	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		567	/* mmap suppsedly 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);
		569
		570	if (cctx->sptr == (void *)-1)
		571	{
		572	perror ("FATAL: unable to mmap stack for coroutine");
		573	_exit (EXIT_FAILURE);
		574	}
		575
		576	# if STACKGUARD
		577	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		578	# endif
		579
		580	#else
		581
		582	cctx->ssize = STACKSIZE * (long)sizeof (long);
		583	New (0, cctx->sptr, STACKSIZE, long);
		584
		585	if (!cctx->sptr)
		586	{
		587	perror ("FATAL: unable to malloc stack for coroutine");
		588	_exit (EXIT_FAILURE);
		589	}
		590
		591	#endif
		592
		593	#if USE_VALGRIND
		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);
		601
		602	return cctx;
		603	}
		604
		605	static void
		606	cctx_free (coro_cctx *cctx)
		607	{
		608	if (!cctx)
		609	return;
		610
		611	--cctx_count;
		612
		613	#if USE_VALGRIND
		614	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		615	#endif
		616
		617	#if HAVE_MMAP
		618	munmap (cctx->sptr, cctx->ssize);
		619	#else
		620	Safefree (cctx->sptr);
		621	#endif
		622
		623	Safefree (cctx);
		624	}
		625
		626	static coro_cctx *
		627	cctx_get ()
		628	{
		629	coro_cctx *cctx;
		630
		631	if (cctx_first)
		632	{
		633	--cctx_idle;
		634	cctx = cctx_first;
		635	cctx_first = cctx->next;
		636	}
		637	else
		638	{
		639	cctx = cctx_new ();
		640	PL_op = PL_op->op_next;
		641	}
		642
		643	return cctx;
		644	}
		645
		646	static void
		647	cctx_put (coro_cctx *cctx)
		648	{
		649	++cctx_idle;
		650	cctx->next = cctx_first;
		651	cctx_first = cctx;
		652	}
		653
		654	/* never call directly, always through the coro_state_transfer global variable */
		655	static void NOINLINE
		656	transfer (struct coro *prev, struct coro *next, int flags)
		657	{
		658	dSTACKLEVEL;
		659
		660	/* sometimes transfer is only called to set idle_sp */
		661	if (flags == TRANSFER_SET_STACKLEVEL)
		662	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		663	else if (prev != next)
		664	{
		665	coro_cctx *prev__cctx;
		666
		667	LOCK;
		668
		669	if (next->mainstack)
		670	{
		671	/* coroutine already started */
		672	SAVE (prev, flags);
		673	LOAD (next);
		674	}
		675	else
		676	{
		677	/* need to start coroutine */
		678	/* first get rid of the old state */
		679	SAVE (prev, -1);
		680	/* setup coroutine call */
		681	setup_coro (next);
		682	/* need a stack */
		683	next->cctx = 0;
		684	}
		685
		686	if (!prev->cctx)
		687	/* create a new empty context */
		688	Newz (0, prev->cctx, 1, coro_cctx);
		689
		690	prev__cctx = prev->cctx;
		691
		692	/* possibly "free" the cctx */
		693	if (prev__cctx->idle_sp == STACKLEVEL)
		694	{
		695	cctx_put (prev__cctx);
		696	prev->cctx = 0;
		697	}
		698
		699	if (!next->cctx)
		700	next->cctx = cctx_get ();
		701
		702	if (prev__cctx != next->cctx)
		703	{
		704	prev__cctx->top_env = PL_top_env;
		705	PL_top_env = next->cctx->top_env;
		706	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		707	}
		708
		709	free_coro_mortal ();
		710
		711	UNLOCK;
		712	}
		713	}
		714
		715	struct transfer_args
		716	{
		717	struct coro *prev, *next;
		718	int flags;
		719	};
		720
		721	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		722
		723	static void
		724	coro_state_destroy (struct coro *coro)
		725	{
		726	if (coro->refcnt--)
		727	return;
		728
		729	if (coro->mainstack && coro->mainstack != main_mainstack)
		730	{
		731	struct coro temp;
		732
		733	SAVE ((&temp), TRANSFER_SAVE_ALL);
		734	LOAD (coro);
		735
		736	coro_destroy_stacks ();
		737
		738	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		739
		740	coro->mainstack = 0;
		741	}
		742
		743	cctx_free (coro->cctx);
		744	SvREFCNT_dec (coro->args);
		745	Safefree (coro);
		746	}
		747
838	static void	748	static int
		749	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		750	{
		751	struct coro *coro = (struct coro *)mg->mg_ptr;
		752	mg->mg_ptr = 0;
		753
		754	coro_state_destroy (coro);
		755
		756	return 0;
		757	}
		758
		759	static int
		760	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		761	{
		762	struct coro *coro = (struct coro *)mg->mg_ptr;
		763
		764	++coro->refcnt;
		765
		766	return 0;
		767	}
		768
		769	static MGVTBL coro_state_vtbl = {
		770	0, 0, 0, 0,
		771	coro_state_clear,
		772	0,
		773	#ifdef MGf_DUP
		774	coro_state_dup,
		775	#else
		776	# define MGf_DUP 0
		777	#endif
		778	};
		779
		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
		803	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		804	{
		805	ta->prev = SvSTATE (prev);
		806	ta->next = SvSTATE (next);
		807	ta->flags = flags;
		808	}
		809
		810	static void
839	api_transfer(pTHX_ SV *prev, SV *next, int flags)	811	api_transfer (SV *prev, SV *next, int flags)
840	{	812	{
841	SV_CORO (prev, "Coro::transfer");	813	dTHX;
842	SV_CORO (next, "Coro::transfer");	814	struct transfer_args ta;
843		815
844	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	816	prepare_transfer (&ta, prev, next, flags);
		817	TRANSFER (ta);
845	}	818	}
846		819
847	/** Coro ********************************************************************/	820	/** Coro ********************************************************************/
848		821
849	#define PRIO_MAX 3	822	#define PRIO_MAX 3
…		…
853	#define PRIO_IDLE -3	826	#define PRIO_IDLE -3
854	#define PRIO_MIN -4	827	#define PRIO_MIN -4
855		828
856	/* for Coro.pm */	829	/* for Coro.pm */
857	static GV *coro_current, *coro_idle;	830	static GV *coro_current, *coro_idle;
858	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	831	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
859	static int coro_nready;	832	static int coro_nready;
860		833
861	static void	834	static void
862	coro_enq (pTHX_ SV *sv)	835	coro_enq (SV *sv)
863	{	836	{
		837	int prio;
		838
864	if (SvTYPE (sv) == SVt_PVHV)	839	if (SvTYPE (sv) != SVt_PVHV)
865	{
866	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
867	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
868
869	prio = prio > PRIO_MAX ? PRIO_MAX
870	: prio < PRIO_MIN ? PRIO_MIN
871	: prio;
872
873	av_push (coro_ready [prio - PRIO_MIN], sv);
874	coro_nready++;
875
876	return;
877	}
878
879	croak ("Coro::ready tried to enqueue something that is not a coroutine");	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);
		845	coro_nready++;
880	}	846	}
881		847
882	static SV *	848	static SV *
883	coro_deq (pTHX_ int min_prio)	849	coro_deq (int min_prio)
884	{	850	{
885	int prio = PRIO_MAX - PRIO_MIN;	851	int prio = PRIO_MAX - PRIO_MIN;
886		852
887	min_prio -= PRIO_MIN;	853	min_prio -= PRIO_MIN;
888	if (min_prio < 0)	854	if (min_prio < 0)
889	min_prio = 0;	855	min_prio = 0;
890		856
891	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	857	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
892	if (av_len (coro_ready[prio]) >= 0)	858	if (AvFILLp (coro_ready [prio]) >= 0)
893	{	859	{
894	coro_nready--;	860	coro_nready--;
895	return av_shift (coro_ready[prio]);	861	return av_shift (coro_ready [prio]);
896	}	862	}
897		863
898	return 0;	864	return 0;
899	}	865	}
900		866
…		…
905		871
906	if (SvROK (coro))	872	if (SvROK (coro))
907	coro = SvRV (coro);	873	coro = SvRV (coro);
908		874
909	LOCK;	875	LOCK;
910	coro_enq (aTHX_ SvREFCNT_inc (coro));	876	coro_enq (SvREFCNT_inc (coro));
911	UNLOCK;	877	UNLOCK;
912	}	878	}
913		879
914	static void	880	static void
		881	prepare_schedule (struct transfer_args *ta)
		882	{
		883	SV *current, *prev, *next;
		884
		885	current = GvSV (coro_current);
		886
		887	for (;;)
		888	{
		889	LOCK;
		890	next = coro_deq (PRIO_MIN);
		891	UNLOCK;
		892
		893	if (next)
		894	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	}
		909	}
		910
		911	prev = SvRV (current);
		912	SvRV (current) = next;
		913
		914	/* free this only after the transfer */
		915	LOCK;
		916	free_coro_mortal ();
		917	UNLOCK;
		918	coro_mortal = prev;
		919
		920	ta->prev = SvSTATE (prev);
		921	ta->next = SvSTATE (next);
		922	ta->flags = TRANSFER_SAVE_ALL;
		923	}
		924
		925	static void
		926	prepare_cede (struct transfer_args *ta)
		927	{
		928	LOCK;
		929	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		930	UNLOCK;
		931
		932	prepare_schedule (ta);
		933	}
		934
		935	static void
915	api_schedule (void)	936	api_schedule (void)
916	{	937	{
917	dTHX;	938	dTHX;
		939	struct transfer_args ta;
918		940
919	SV *prev, *next;	941	prepare_schedule (&ta);
920		942	TRANSFER (ta);
921	LOCK;
922
923	prev = SvRV (GvSV (coro_current));
924	next = coro_deq (aTHX_ PRIO_MIN);
925
926	if (!next)
927	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
928
929	/* free this only after the transfer */
930	coro_mortal = prev;
931	SV_CORO (prev, "Coro::schedule");
932
933	SvRV (GvSV (coro_current)) = next;
934
935	SV_CORO (next, "Coro::schedule");
936
937	UNLOCK;
938
939	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
940	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
941	}	943	}
942		944
943	static void	945	static void
944	api_cede (void)	946	api_cede (void)
945	{	947	{
946	dTHX;	948	dTHX;
		949	struct transfer_args ta;
947		950
948	LOCK;	951	prepare_cede (&ta);
949	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	952	TRANSFER (ta);
950	UNLOCK;
951
952	api_schedule ();
953	}	953	}
954		954
955	MODULE = Coro::State PACKAGE = Coro::State	955	MODULE = Coro::State PACKAGE = Coro::State
956		956
957	PROTOTYPES: ENABLE	957	PROTOTYPES: DISABLE
958		958
959	BOOT:	959	BOOT:
960	{ /* {} necessary for stoopid perl-5.6.x */	960	{
961	#ifdef USE_ITHREADS	961	#ifdef USE_ITHREADS
962	MUTEX_INIT (&coro_mutex);	962	MUTEX_INIT (&coro_mutex);
963	#endif	963	#endif
		964	BOOT_PAGESIZE;
964		965
965	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
966	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
967	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	966	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
968		967
969	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	968	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
970	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	969	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
971	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	970	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
972	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
973		971
974	main_mainstack = PL_mainstack;	972	main_mainstack = PL_mainstack;
975		973
976	coroapi.ver = CORO_API_VERSION;	974	coroapi.ver = CORO_API_VERSION;
977	coroapi.transfer = api_transfer;	975	coroapi.transfer = api_transfer;
978	}
979		976
980	Coro::State	977	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
981	_newprocess(args)	978	}
982	SV * args	979
983	PROTOTYPE: $	980	SV *
		981	new (char *klass, ...)
984	CODE:	982	CODE:
985	Coro__State coro;	983	{
		984	struct coro *coro;
		985	HV *hv;
		986	int i;
986		987
987	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
988	croak ("Coro::State::_newprocess expects an arrayref");
989
990	Newz (0, coro, 1, struct coro);	988	Newz (0, coro, 1, struct coro);
		989	coro->args = newAV ();
991		990
992	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	991	hv = newHV ();
993	/*coro->mainstack = 0; *//*actual work is done inside transfer */	992	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
994	/*coro->stack = 0;*/	993	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
995		994
996	/* same as JMPENV_BOOTSTRAP */	995	for (i = 1; i < items; i++)
997	/* we might be able to recycle start_env, but safe is safe */	996	av_push (coro->args, newSVsv (ST (i)));
998	/*Zero(&coro->start_env, 1, JMPENV);*/	997	}
999	coro->start_env.je_ret = -1;
1000	coro->start_env.je_mustcatch = TRUE;
1001
1002	RETVAL = coro;
1003	OUTPUT:	998	OUTPUT:
1004	RETVAL	999	RETVAL
1005		1000
1006	void	1001	void
1007	transfer(prev, next, flags)	1002	_set_stacklevel (...)
1008	SV *prev	1003	ALIAS:
1009	SV *next	1004	Coro::State::transfer = 1
1010	int flags	1005	Coro::schedule = 2
1011	PROTOTYPE: @	1006	Coro::cede = 3
		1007	Coro::Cont::yield = 4
1012	CODE:	1008	CODE:
1013	PUTBACK;	1009	{
1014	SV_CORO (next, "Coro::transfer");	1010	struct transfer_args ta;
1015	SV_CORO (prev, "Coro::transfer");	1011
1016	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1012	switch (ix)
1017	SPAGAIN;	1013	{
		1014	case 0:
		1015	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1016	ta.next = 0;
		1017	ta.flags = TRANSFER_SET_STACKLEVEL;
		1018	break;
		1019
		1020	case 1:
		1021	if (items != 3)
		1022	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1023
		1024	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1025	break;
		1026
		1027	case 2:
		1028	prepare_schedule (&ta);
		1029	break;
		1030
		1031	case 3:
		1032	prepare_cede (&ta);
		1033	break;
		1034
		1035	case 4:
		1036	{
		1037	SV *yieldstack;
		1038	SV *sv;
		1039	AV *defav = GvAV (PL_defgv);
		1040
		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;
		1060
		1061	}
		1062
		1063	TRANSFER (ta);
		1064	}
1018		1065
1019	void	1066	void
1020	DESTROY(coro)	1067	_clone_state_from (SV *dst, SV *src)
1021	Coro::State coro	1068	CODE:
1022	CODE:	1069	{
		1070	struct coro *coro_src = SvSTATE (src);
1023		1071
1024	if (coro->mainstack && coro->mainstack != main_mainstack)	1072	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1025	{
1026	struct coro temp;
1027		1073
1028	PUTBACK;	1074	++coro_src->refcnt;
1029	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1075	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1030	LOAD (aTHX_ coro);	1076	}
1031	SPAGAIN;
1032
1033	destroy_stacks (aTHX);
1034
1035	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1036	SPAGAIN;
1037
1038	coro->mainstack = 0;
1039	}
1040
1041	deallocate_stack (coro);
1042	SvREFCNT_dec (coro->args);
1043	Safefree (coro);
1044		1077
1045	void	1078	void
1046	_exit(code)	1079	_exit (code)
1047	int code	1080	int code
1048	PROTOTYPE: $	1081	PROTOTYPE: $
1049	CODE:	1082	CODE:
1050	_exit (code);	1083	_exit (code);
1051		1084
1052	MODULE = Coro::State PACKAGE = Coro::Cont	1085	int
		1086	cctx_count ()
		1087	CODE:
		1088	RETVAL = cctx_count;
		1089	OUTPUT:
		1090	RETVAL
1053		1091
1054	# this is slightly dirty (should expose a c-level api)	1092	int
1055		1093	cctx_idle ()
1056	void	1094	CODE:
1057	yield(...)	1095	RETVAL = cctx_idle;
1058	PROTOTYPE: @	1096	OUTPUT:
1059	CODE:	1097	RETVAL
1060	SV *yieldstack;
1061	SV *sv;
1062	AV *defav = GvAV (PL_defgv);
1063	struct coro *prev, *next;
1064
1065	yieldstack = *hv_fetch (
1066	(HV *)SvRV (GvSV (coro_current)),
1067	"yieldstack", sizeof ("yieldstack") - 1,
1068	0
1069	);
1070
1071	/* set up @_ -- ugly */
1072	av_clear (defav);
1073	av_fill (defav, items - 1);
1074	while (items--)
1075	av_store (defav, items, SvREFCNT_inc (ST(items)));
1076
1077	sv = av_pop ((AV *)SvRV (yieldstack));
1078	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1079	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1080	SvREFCNT_dec (sv);
1081
1082	transfer (aTHX_ prev, next, 0);
1083		1098
1084	MODULE = Coro::State PACKAGE = Coro	1099	MODULE = Coro::State PACKAGE = Coro
1085		1100
1086	# this is slightly dirty (should expose a c-level api)
1087
1088	BOOT:	1101	BOOT:
1089	{	1102	{
1090	int i;	1103	int i;
		1104
1091	HV *stash = gv_stashpv ("Coro", TRUE);	1105	coro_stash = gv_stashpv ("Coro", TRUE);
1092		1106
1093	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1107	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1094	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1108	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1095	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1109	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1096	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1110	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1097	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1111	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1098	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1112	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1099		1113
1100	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1114	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1101	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1115	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1102		1116
1103	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1117	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1111	coroapi.ready = api_ready;	1125	coroapi.ready = api_ready;
1112	coroapi.nready = &coro_nready;	1126	coroapi.nready = &coro_nready;
1113	coroapi.current = coro_current;	1127	coroapi.current = coro_current;
1114		1128
1115	GCoroAPI = &coroapi;	1129	GCoroAPI = &coroapi;
1116	sv_setiv(sv, (IV)&coroapi);	1130	sv_setiv (sv, (IV)&coroapi);
1117	SvREADONLY_on(sv);	1131	SvREADONLY_on (sv);
1118	}	1132	}
1119	}	1133	}
1120		1134
1121	#if !PERL_MICRO	1135	int
		1136	prio (Coro::State coro, int newprio = 0)
		1137	ALIAS:
		1138	nice = 1
		1139	CODE:
		1140	{
		1141	RETVAL = coro->prio;
		1142
		1143	if (items > 1)
		1144	{
		1145	if (ix)
		1146	newprio += coro->prio;
		1147
		1148	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1149	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1150
		1151	coro->prio = newprio;
		1152	}
		1153	}
1122		1154
1123	void	1155	void
1124	ready(self)	1156	ready (SV *self)
1125	SV * self
1126	PROTOTYPE: $	1157	PROTOTYPE: $
1127	CODE:	1158	CODE:
1128	api_ready (self);	1159	api_ready (self);
1129		1160
1130	#endif
1131
1132	int	1161	int
1133	nready(...)	1162	nready (...)
1134	PROTOTYPE:	1163	PROTOTYPE:
1135	CODE:	1164	CODE:
1136	RETVAL = coro_nready;	1165	RETVAL = coro_nready;
1137	OUTPUT:	1166	OUTPUT:
1138	RETVAL	1167	RETVAL
1139		1168
1140	void	1169	MODULE = Coro::State PACKAGE = Coro::AIO
1141	schedule(...)
1142	PROTOTYPE:
1143	CODE:
1144	api_schedule ();
1145		1170
1146	void
1147	cede(...)
1148	PROTOTYPE:
1149	CODE:
1150	api_cede ();
1151
1152	# and these are hacks
1153	SV *	1171	SV *
1154	_aio_get_state ()	1172	_get_state ()
1155	CODE:	1173	CODE:
1156	{	1174	{
1157	struct {	1175	struct {
1158	int errorno;	1176	int errorno;
1159	int laststype;	1177	int laststype;
…		…
1170	}	1188	}
1171	OUTPUT:	1189	OUTPUT:
1172	RETVAL	1190	RETVAL
1173		1191
1174	void	1192	void
1175	_aio_set_state (char *data_)	1193	_set_state (char *data_)
1176	PROTOTYPE: $	1194	PROTOTYPE: $
1177	CODE:	1195	CODE:
1178	{	1196	{
1179	struct {	1197	struct {
1180	int errorno;	1198	int errorno;

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