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Comparing Coro/Coro/State.xs (file contents):
Revision 1.60 by root, Mon Aug 9 02:41:27 2004 UTC vs.
Revision 1.108 by root, Mon Nov 27 18:15:47 2006 UTC

1	#define PERL_NO_GET_CONTEXT	1	#include "libcoro/coro.c"
2		2
3	#include "EXTERN.h"	3	#include "EXTERN.h"
4	#include "perl.h"	4	#include "perl.h"
5	#include "XSUB.h"	5	#include "XSUB.h"
6		6
7	#include "patchlevel.h"	7	#include "patchlevel.h"
8		8
9	#if PATCHLEVEL < 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)
10	# ifndef PL_ppaddr	20	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	21	# define PL_ppaddr ppaddr
12	# endif	22	# endif
13	# ifndef call_sv	23	# ifndef call_sv
14	# define call_sv perl_call_sv	24	# define call_sv perl_call_sv
…		…
25	# ifndef IS_PADCONST	35	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	36	# define IS_PADCONST(v) 0
27	# endif	37	# endif
28	#endif	38	#endif
29		39
30	#include "libcoro/coro.c"
31
32	#include <signal.h>	40	#include <stdio.h>
		41	#include <errno.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
33		50
34	#ifdef HAVE_MMAP	51	#ifdef HAVE_MMAP
35	# include <unistd.h>	52	# include <unistd.h>
36	# include <sys/mman.h>	53	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
…		…
39	# define MAP_ANONYMOUS MAP_ANON	56	# define MAP_ANONYMOUS MAP_ANON
40	# else	57	# else
41	# undef HAVE_MMAP	58	# undef HAVE_MMAP
42	# endif	59	# endif
43	# 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
44	#endif	68	# endif
45		69	#else
46	#define SUB_INIT "Coro::State::initialize"	70	# define PAGESIZE 0
47	#define UCORO_STATE "_coro_state"	71	# define BOOT_PAGESIZE (void)0
		72	#endif
48		73
49	/* 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
50	* 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
51	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
53		79
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		81
56	#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))
57		89
58	#include "CoroAPI.h"	90	#include "CoroAPI.h"
		91
		92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59		93
60	#ifdef USE_ITHREADS	94	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	95	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	98	#else
65	# define LOCK 0	99	# define LOCK (void)0
66	# define UNLOCK 0	100	# define UNLOCK (void)0
67	#endif	101	#endif
68		102
69	static struct CoroAPI coroapi;	103	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	104	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	105	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV *coro_mortal; /* will be freed after next transfer */	106	static SV *coro_mortal; /* will be freed after next transfer */
75		107
76	/* 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 */
77	typedef struct {	112	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	113	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		114
82	coro_context cctx;	115	/* the stack */
83
84	void *sptr;	116	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	117	long ssize; /* positive == mmap, otherwise malloc */
86	} coro_stack;
87		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 */
88	struct coro {	130	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	131	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	132	coro_cctx *cctx;
91		133
92	/* the optional C context */	134	/* data associated with this coroutine (initial args) */
93	coro_stack *stack;	135	AV *args;
94	void *cursp;
95	int gencnt;	136	int refcnt;
96		137
97	/* optionally saved, might be zero */	138	/* optionally saved, might be zero */
98	AV *defav;	139	AV *defav;
99	SV *defsv;	140	SV *defsv;
100	SV *errsv;	141	SV *errsv;
101		142
102	/* saved global state not related to stacks */	143	#define VAR(name,type) type name;
103	U8 dowarn;	144	# include "state.h"
104	I32 in_eval;	145	#undef VAR
105		146
106	/* the stacks and related info (callchain etc..) */	147	/* coro process data */
107	PERL_SI *curstackinfo;	148	int prio;
108	AV *curstack;
109	AV *mainstack;
110	SV **stack_sp;
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	SV **stack_base;
115	SV **stack_max;
116	SV **tmps_stack;
117	I32 tmps_floor;
118	I32 tmps_ix;
119	I32 tmps_max;
120	I32 *markstack;
121	I32 *markstack_ptr;
122	I32 *markstack_max;
123	I32 *scopestack;
124	I32 scopestack_ix;
125	I32 scopestack_max;
126	ANY *savestack;
127	I32 savestack_ix;
128	I32 savestack_max;
129	OP **retstack;
130	I32 retstack_ix;
131	I32 retstack_max;
132	COP *curcop;
133	JMPENV *top_env;
134
135	/* data associated with this coroutine (initial args) */
136	AV *args;
137	};	149	};
138		150
139	typedef struct coro *Coro__State;	151	typedef struct coro *Coro__State;
140	typedef struct coro *Coro__State_or_hashref;	152	typedef struct coro *Coro__State_or_hashref;
141		153
142	/* mostly copied from op.c:cv_clone2 */	154	static AV *
143	STATIC AV *	155	coro_clone_padlist (CV *cv)
144	clone_padlist (pTHX_ AV *protopadlist)
145	{	156	{
146	AV *av;	157	AV *padlist = CvPADLIST (cv);
147	I32 ix;
148	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
149	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
150	SV **pname = AvARRAY (protopad_name);
151	SV **ppad = AvARRAY (protopad);
152	I32 fname = AvFILLp (protopad_name);
153	I32 fpad = AvFILLp (protopad);
154	AV *newpadlist, *newpad_name, *newpad;	158	AV *newpadlist, *newpad;
155	SV **npad;
156
157	newpad_name = newAV ();
158	for (ix = fname; ix >= 0; ix--)
159	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161	newpad = newAV ();
162	av_fill (newpad, AvFILLp (protopad));
163	npad = AvARRAY (newpad);
164		159
165	newpadlist = newAV ();	160	newpadlist = newAV ();
166	AvREAL_off (newpadlist);	161	AvREAL_off (newpadlist);
167	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)));
168	av_store (newpadlist, 1, (SV *) newpad);	171	av_store (newpadlist, 1, (SV *)newpad);
169
170	av = newAV (); /* will be @_ */
171	av_extend (av, 0);
172	av_store (newpad, 0, (SV *) av);
173	AvFLAGS (av) = AVf_REIFY;
174
175	for (ix = fpad; ix > 0; ix--)
176	{
177	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
178
179	if (namesv && namesv != &PL_sv_undef)
180	{
181	char *name = SvPVX (namesv); /* XXX */
182
183	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
184	{ /* lexical from outside? */
185	npad[ix] = SvREFCNT_inc (ppad[ix]);
186	}
187	else
188	{ /* our own lexical */
189	SV *sv;
190	if (*name == '&')
191	sv = SvREFCNT_inc (ppad[ix]);
192	else if (*name == '@')
193	sv = (SV *) newAV ();
194	else if (*name == '%')
195	sv = (SV *) newHV ();
196	else
197	sv = NEWSV (0, 0);
198
199	#ifdef SvPADBUSY
200	if (!SvPADBUSY (sv))
201	#endif
202	SvPADMY_on (sv);
203
204	npad[ix] = sv;
205	}
206	}
207	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
208	{
209	npad[ix] = SvREFCNT_inc (ppad[ix]);
210	}
211	else
212	{
213	SV *sv = NEWSV (0, 0);
214	SvPADTMP_on (sv);
215	npad[ix] = sv;
216	}
217	}
218
219	#if 0 /* return -ENOTUNDERSTOOD */
220	/* Now that vars are all in place, clone nested closures. */
221
222	for (ix = fpad; ix > 0; ix--) {
223	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224	if (namesv
225	&& namesv != &PL_sv_undef
226	&& !(SvFLAGS(namesv) & SVf_FAKE)
227	&& *SvPVX(namesv) == '&'
228	&& CvCLONE(ppad[ix]))
229	{
230	CV *kid = cv_clone((CV*)ppad[ix]);
231	SvREFCNT_dec(ppad[ix]);
232	CvCLONE_on(kid);
233	SvPADMY_on(kid);
234	npad[ix] = (SV*)kid;
235	}
236	}
237	#endif
238		172
239	return newpadlist;	173	return newpadlist;
240	}	174	}
241		175
242	STATIC void	176	static void
243	free_padlist (pTHX_ AV *padlist)	177	free_padlist (AV *padlist)
244	{	178	{
245	/* may be during global destruction */	179	/* may be during global destruction */
246	if (SvREFCNT (padlist))	180	if (SvREFCNT (padlist))
247	{	181	{
248	I32 i = AvFILLp (padlist);	182	I32 i = AvFILLp (padlist);
…		…
261		195
262	SvREFCNT_dec ((SV*)padlist);	196	SvREFCNT_dec ((SV*)padlist);
263	}	197	}
264	}	198	}
265		199
266	STATIC int	200	static int
267	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	201	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268	{	202	{
269	AV *padlist;	203	AV *padlist;
270	AV *av = (AV *)mg->mg_obj;	204	AV *av = (AV *)mg->mg_obj;
271		205
272	/* casting is fun. */	206	/* casting is fun. */
273	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	207	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274	free_padlist (aTHX_ padlist);	208	free_padlist (padlist);
		209
		210	SvREFCNT_dec (av);
		211
		212	return 0;
275	}	213	}
276		214
277	#define PERL_MAGIC_coro PERL_MAGIC_ext	215	#define PERL_MAGIC_coro PERL_MAGIC_ext
278		216
279	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	217	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
280		218
281	/* the next two functions merely cache the padlists */	219	/* the next two functions merely cache the padlists */
282	STATIC void	220	static void
283	get_padlist (pTHX_ CV *cv)	221	get_padlist (CV *cv)
284	{	222	{
285	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	223	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
286		224
287	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	225	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
288	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	226	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
289	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
290	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	236	CvPADLIST (cv) = coro_clone_padlist (cv);
		237	#endif
		238	}
291	}	239	}
292		240
293	STATIC void	241	static void
294	put_padlist (pTHX_ CV *cv)	242	put_padlist (CV *cv)
295	{	243	{
296	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	244	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
297		245
298	if (!mg)	246	if (!mg)
299	{	247	{
…		…
307	}	255	}
308		256
309	#define SB do {	257	#define SB do {
310	#define SE } while (0)	258	#define SE } while (0)
311		259
312	#define LOAD(state) load_state(aTHX_ (state));	260	#define LOAD(state) load_state((state));
313	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	261	#define SAVE(state,flags) save_state((state),(flags));
314		262
315	#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
316		264
317	static void	265	static void
318	load_state(pTHX_ Coro__State c)	266	load_state(Coro__State c)
319	{	267	{
320	PL_dowarn = c->dowarn;	268	#define VAR(name,type) PL_ ## name = c->name;
321	PL_in_eval = c->in_eval;	269	# include "state.h"
322		270	#undef VAR
323	PL_curstackinfo = c->curstackinfo;
324	PL_curstack = c->curstack;
325	PL_mainstack = c->mainstack;
326	PL_stack_sp = c->stack_sp;
327	PL_op = c->op;
328	PL_curpad = c->curpad;
329	PL_comppad = c->comppad;
330	PL_stack_base = c->stack_base;
331	PL_stack_max = c->stack_max;
332	PL_tmps_stack = c->tmps_stack;
333	PL_tmps_floor = c->tmps_floor;
334	PL_tmps_ix = c->tmps_ix;
335	PL_tmps_max = c->tmps_max;
336	PL_markstack = c->markstack;
337	PL_markstack_ptr = c->markstack_ptr;
338	PL_markstack_max = c->markstack_max;
339	PL_scopestack = c->scopestack;
340	PL_scopestack_ix = c->scopestack_ix;
341	PL_scopestack_max = c->scopestack_max;
342	PL_savestack = c->savestack;
343	PL_savestack_ix = c->savestack_ix;
344	PL_savestack_max = c->savestack_max;
345	PL_retstack = c->retstack;
346	PL_retstack_ix = c->retstack_ix;
347	PL_retstack_max = c->retstack_max;
348	PL_curcop = c->curcop;
349	PL_top_env = c->top_env;
350		271
351	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	272	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
352	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	273	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
353	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	274	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
354		275
…		…
361	{	282	{
362	AV *padlist = (AV *)POPs;	283	AV *padlist = (AV *)POPs;
363		284
364	if (padlist)	285	if (padlist)
365	{	286	{
366	put_padlist (aTHX_ cv); /* mark this padlist as available */	287	put_padlist (cv); /* mark this padlist as available */
367	CvPADLIST(cv) = padlist;	288	CvPADLIST(cv) = padlist;
368	}	289	}
369		290
370	++CvDEPTH(cv);	291	++CvDEPTH(cv);
371	}	292	}
…		…
373	PUTBACK;	294	PUTBACK;
374	}	295	}
375	}	296	}
376		297
377	static void	298	static void
378	save_state(pTHX_ Coro__State c, int flags)	299	save_state(Coro__State c, int flags)
379	{	300	{
380	{	301	{
381	dSP;	302	dSP;
382	I32 cxix = cxstack_ix;	303	I32 cxix = cxstack_ix;
383	PERL_CONTEXT *ccstk = cxstack;	304	PERL_CONTEXT *ccstk = cxstack;
…		…
411	}	332	}
412		333
413	PUSHs ((SV *)CvPADLIST(cv));	334	PUSHs ((SV *)CvPADLIST(cv));
414	PUSHs ((SV *)cv);	335	PUSHs ((SV *)cv);
415		336
416	get_padlist (aTHX_ cv); /* this is a monster */	337	get_padlist (cv);
417	}	338	}
418	}	339	}
419	#ifdef CXt_FORMAT	340	#ifdef CXt_FORMAT
420	else if (CxTYPE(cx) == CXt_FORMAT)	341	else if (CxTYPE(cx) == CXt_FORMAT)
421	{	342	{
…		…
439		360
440	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;
441	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	362	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
442	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	363	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
443		364
444	c->dowarn = PL_dowarn;	365	#define VAR(name,type)c->name = PL_ ## name;
445	c->in_eval = PL_in_eval;	366	# include "state.h"
446		367	#undef VAR
447	c->curstackinfo = PL_curstackinfo;
448	c->curstack = PL_curstack;
449	c->mainstack = PL_mainstack;
450	c->stack_sp = PL_stack_sp;
451	c->op = PL_op;
452	c->curpad = PL_curpad;
453	c->comppad = PL_comppad;
454	c->stack_base = PL_stack_base;
455	c->stack_max = PL_stack_max;
456	c->tmps_stack = PL_tmps_stack;
457	c->tmps_floor = PL_tmps_floor;
458	c->tmps_ix = PL_tmps_ix;
459	c->tmps_max = PL_tmps_max;
460	c->markstack = PL_markstack;
461	c->markstack_ptr = PL_markstack_ptr;
462	c->markstack_max = PL_markstack_max;
463	c->scopestack = PL_scopestack;
464	c->scopestack_ix = PL_scopestack_ix;
465	c->scopestack_max = PL_scopestack_max;
466	c->savestack = PL_savestack;
467	c->savestack_ix = PL_savestack_ix;
468	c->savestack_max = PL_savestack_max;
469	c->retstack = PL_retstack;
470	c->retstack_ix = PL_retstack_ix;
471	c->retstack_max = PL_retstack_max;
472	c->curcop = PL_curcop;
473	c->top_env = PL_top_env;
474	}	368	}
475		369
476	/*	370	/*
477	* allocate various perl stacks. This is an exact copy	371	* allocate various perl stacks. This is an exact copy
478	* of perl.c:init_stacks, except that it uses less memory	372	* of perl.c:init_stacks, except that it uses less memory
479	* on the (sometimes correct) assumption that coroutines do	373	* on the (sometimes correct) assumption that coroutines do
480	* not usually need a lot of stackspace.	374	* not usually need a lot of stackspace.
481	*/	375	*/
482	STATIC void	376	static void
483	coro_init_stacks (pTHX)	377	coro_init_stacks ()
484	{	378	{
485	LOCK;
486
487	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	379	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
488	PL_curstackinfo->si_type = PERLSI_MAIN;	380	PL_curstackinfo->si_type = PERLSI_MAIN;
489	PL_curstack = PL_curstackinfo->si_stack;	381	PL_curstack = PL_curstackinfo->si_stack;
490	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	382	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
491		383
…		…
512		404
513	New(54,PL_savestack,96,ANY);	405	New(54,PL_savestack,96,ANY);
514	PL_savestack_ix = 0;	406	PL_savestack_ix = 0;
515	PL_savestack_max = 96;	407	PL_savestack_max = 96;
516		408
		409	#if !PERL_VERSION_ATLEAST (5,9,0)
517	New(54,PL_retstack,8,OP*);	410	New(54,PL_retstack,8,OP*);
518	PL_retstack_ix = 0;	411	PL_retstack_ix = 0;
519	PL_retstack_max = 8;	412	PL_retstack_max = 8;
520		413	#endif
521	UNLOCK;
522	}	414	}
523		415
524	/*	416	/*
525	* destroy the stacks, the callchain etc...	417	* destroy the stacks, the callchain etc...
526	*/	418	*/
527	STATIC void	419	static void
528	destroy_stacks(pTHX)	420	coro_destroy_stacks ()
529	{	421	{
530	if (!IN_DESTRUCT)	422	if (!IN_DESTRUCT)
531	{	423	{
532	/* is this ugly, I ask? */	424	/* is this ugly, I ask? */
533	LEAVE_SCOPE (0);	425	LEAVE_SCOPE (0);
…		…
564		456
565	Safefree (PL_tmps_stack);	457	Safefree (PL_tmps_stack);
566	Safefree (PL_markstack);	458	Safefree (PL_markstack);
567	Safefree (PL_scopestack);	459	Safefree (PL_scopestack);
568	Safefree (PL_savestack);	460	Safefree (PL_savestack);
		461	#if !PERL_VERSION_ATLEAST (5,9,0)
569	Safefree (PL_retstack);	462	Safefree (PL_retstack);
570	}
571
572	static void
573	allocate_stack (Coro__State ctx, int alloc)
574	{
575	coro_stack *stack;
576
577	New (0, stack, 1, coro_stack);
578
579	stack->refcnt = 1;
580	stack->usecnt = 1;
581	stack->gencnt = ctx->gencnt = 0;
582
583	if (alloc)
584	{
585	#if HAVE_MMAP
586	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
587	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588	if (stack->sptr == (void *)-1)
589	#endif	463	#endif
590	{
591	/*FIXME*//*D*//* reasonable stack size! */
592	stack->ssize = - (8192 * sizeof (long));
593	New (0, stack->sptr, 8192, long);
594	}
595	}
596	else
597	stack->sptr = 0;
598
599	ctx->stack = stack;
600	}	464	}
601		465
602	static void	466	static void
603	deallocate_stack (Coro__State ctx)	467	setup_coro (struct coro *coro)
604	{
605	coro_stack *stack = ctx->stack;
606
607	ctx->stack = 0;
608
609	if (stack)
610	{
611	if (!--stack->refcnt)
612	{
613	#ifdef HAVE_MMAP
614	if (stack->ssize > 0 && stack->sptr)
615	munmap (stack->sptr, stack->ssize);
616	else
617	#endif
618	Safefree (stack->sptr);
619
620	Safefree (stack);
621	}
622	else if (ctx->gencnt == stack->gencnt)
623	--stack->usecnt;
624	}
625	}
626
627	static void
628	setup_coro (void *arg)
629	{	468	{
630	/*	469	/*
631	* emulate part of the perl startup here.	470	* emulate part of the perl startup here.
632	*/	471	*/
633	dTHX;
634	dSP;
635	Coro__State ctx = (Coro__State)arg;
636	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
637		472
638	coro_init_stacks (aTHX);	473	coro_init_stacks ();
		474
639	/*PL_curcop = 0;*/	475	PL_curcop = 0;
640	/*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
641	SvREFCNT_dec (GvAV (PL_defgv));	486	SvREFCNT_dec (GvAV (PL_defgv));
642	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	487	GvAV (PL_defgv) = coro->args; coro->args = 0;
643		488
644	SPAGAIN;
645
646	if (ctx->stack)
647	{
648	ctx->cursp = 0;
649
650	PUSHMARK(SP);
651	PUTBACK;
652	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
653
654	if (SvTRUE (ERRSV))
655	croak (NULL);
656	else
657	croak ("FATAL: CCTXT coroutine returned!");
658	}
659	else
660	{
661	UNOP myop;
662
663	PL_op = (OP *)&myop;
664
665	Zero(&myop, 1, UNOP);	489	Zero (&myop, 1, LOGOP);
666	myop.op_next = Nullop;	490	myop.op_next = Nullop;
667	myop.op_flags = OPf_WANT_VOID;	491	myop.op_flags = OPf_WANT_VOID;
668		492
		493	PL_op = (OP *)&myop;
		494
669	PUSHMARK(SP);	495	PUSHMARK (SP);
670	XPUSHs (sub_init);	496	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
671	/*
672	* the next line is slightly wrong, as PL_op->op_next
673	* is actually being executed so we skip the first op.
674	* that doesn't matter, though, since it is only
675	* pp_nextstate and we never return...
676	* ah yes, and I don't care anyways ;)
677	*/
678	PUTBACK;	497	PUTBACK;
679	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	498	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
680	SPAGAIN;	499	SPAGAIN;
681		500
682	ENTER; /* necessary e.g. for dounwind */	501	ENTER; /* necessary e.g. for dounwind */
683	}	502	}
684	}	503	}
685		504
686	static void	505	static void
687	continue_coro (void *arg)	506	free_coro_mortal ()
688	{	507	{
689	/*
690	* this is a _very_ stripped down perl interpreter ;)
691	*/
692	dTHX;
693	Coro__State ctx = (Coro__State)arg;
694	JMPENV coro_start_env;
695
696	PL_top_env = &ctx->start_env;
697
698	ctx->cursp = 0;
699	PL_op = PL_op->op_next;
700	CALLRUNOPS(aTHX);
701
702	abort ();
703	}
704
705	STATIC void
706	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
707	{
708	dSTACKLEVEL;
709
710	if (prev != next)
711	{
712	if (next->mainstack)
713	{
714	LOCK;
715	SAVE (prev, flags);
716	LOAD (next);
717	UNLOCK;
718
719	/* mark this state as in-use */
720	next->mainstack = 0;
721	next->tmps_ix = -2;
722
723	/* stacklevel changed? if yes, grab the stack for us! */
724	if (flags & TRANSFER_SAVE_CCTXT)
725	{
726	if (!prev->stack)
727	allocate_stack (prev, 0);
728	else if (prev->cursp != stacklevel
729	&& prev->stack->usecnt > 1)
730	{
731	prev->gencnt = ++prev->stack->gencnt;
732	prev->stack->usecnt = 1;
733	}
734
735	/* has our stack been invalidated? */
736	if (next->stack && next->stack->gencnt != next->gencnt)
737	{
738	deallocate_stack (next);
739	allocate_stack (next, 1);
740	coro_create (&(next->stack->cctx),
741	continue_coro, (void *)next,
742	next->stack->sptr, labs (next->stack->ssize));
743	}
744
745	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
746	prev->cursp = stacklevel;
747	/* don't add any code here */
748	}
749	else
750	next->cursp = stacklevel;
751	}
752	else if (next->tmps_ix == -2)
753	croak ("tried to transfer to running coroutine");
754	else
755	{
756	LOCK;
757	SAVE (prev, -1); /* first get rid of the old state */
758	UNLOCK;
759
760	if (flags & TRANSFER_SAVE_CCTXT)
761	{
762	if (!prev->stack)
763	allocate_stack (prev, 0);
764
765	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
766	{
767	PL_top_env = &next->start_env;
768
769	setup_coro (next);
770	next->cursp = stacklevel;
771
772	prev->stack->refcnt++;
773	prev->stack->usecnt++;
774	next->stack = prev->stack;
775	next->gencnt = prev->gencnt;
776	}
777	else
778	{
779	assert (!next->stack);
780	allocate_stack (next, 1);
781	coro_create (&(next->stack->cctx),
782	setup_coro, (void *)next,
783	next->stack->sptr, labs (next->stack->ssize));
784	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
785	prev->cursp = stacklevel;
786	/* don't add any code here */
787	}
788	}
789	else
790	{
791	setup_coro (next);
792	next->cursp = stacklevel;
793	}
794	}
795	}
796
797	LOCK;
798	if (coro_mortal)	508	if (coro_mortal)
799	{	509	{
800	SvREFCNT_dec (coro_mortal);	510	SvREFCNT_dec (coro_mortal);
801	coro_mortal = 0;	511	coro_mortal = 0;
802	}	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() */
803	UNLOCK;	538	UNLOCK;
804	}
805		539
806	#define SV_CORO(sv,func) \	540	/*
807	do { \	541	* this is a _very_ stripped down perl interpreter ;)
808	if (SvROK (sv)) \	542	*/
809	sv = SvRV (sv); \	543	PL_top_env = &PL_start_env;
810	\
811	if (SvTYPE (sv) == SVt_PVHV) \
812	{ \
813	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
814	\
815	if (!he) \
816	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
817	\
818	(sv) = SvRV (HeVAL(he)); \
819	} \
820	\
821	/* must also be changed inside Coro::Cont::yield */ \
822	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
823	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
824	\
825	} while(0)
826		544
827	#define SvSTATE(sv) (struct coro *)SvIV (sv)	545	/* inject call to cctx_init */
		546	prepare_cctx ((coro_cctx *)arg);
828		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
829	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
830	api_transfer(pTHX_ SV *prev, SV *next, int flags)	811	api_transfer (SV *prev, SV *next, int flags)
831	{	812	{
832	SV_CORO (prev, "Coro::transfer");	813	dTHX;
833	SV_CORO (next, "Coro::transfer");	814	struct transfer_args ta;
834		815
835	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	816	prepare_transfer (&ta, prev, next, flags);
		817	TRANSFER (ta);
836	}	818	}
837		819
838	/** Coro ********************************************************************/	820	/** Coro ********************************************************************/
839		821
840	#define PRIO_MAX 3	822	#define PRIO_MAX 3
…		…
844	#define PRIO_IDLE -3	826	#define PRIO_IDLE -3
845	#define PRIO_MIN -4	827	#define PRIO_MIN -4
846		828
847	/* for Coro.pm */	829	/* for Coro.pm */
848	static GV *coro_current, *coro_idle;	830	static GV *coro_current, *coro_idle;
849	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	831	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
850	static int coro_nready;	832	static int coro_nready;
851		833
852	static void	834	static void
853	coro_enq (pTHX_ SV *sv)	835	coro_enq (SV *sv)
854	{	836	{
		837	int prio;
		838
855	if (SvTYPE (sv) == SVt_PVHV)	839	if (SvTYPE (sv) != SVt_PVHV)
856	{
857	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
858	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
859
860	prio = prio > PRIO_MAX ? PRIO_MAX
861	: prio < PRIO_MIN ? PRIO_MIN
862	: prio;
863
864	av_push (coro_ready [prio - PRIO_MIN], sv);
865	coro_nready++;
866
867	return;
868	}
869
870	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++;
871	}	846	}
872		847
873	static SV *	848	static SV *
874	coro_deq (pTHX_ int min_prio)	849	coro_deq (int min_prio)
875	{	850	{
876	int prio = PRIO_MAX - PRIO_MIN;	851	int prio = PRIO_MAX - PRIO_MIN;
877		852
878	min_prio -= PRIO_MIN;	853	min_prio -= PRIO_MIN;
879	if (min_prio < 0)	854	if (min_prio < 0)
880	min_prio = 0;	855	min_prio = 0;
881		856
882	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	857	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
883	if (av_len (coro_ready[prio]) >= 0)	858	if (AvFILLp (coro_ready [prio]) >= 0)
884	{	859	{
885	coro_nready--;	860	coro_nready--;
886	return av_shift (coro_ready[prio]);	861	return av_shift (coro_ready [prio]);
887	}	862	}
888		863
889	return 0;	864	return 0;
890	}	865	}
891		866
…		…
896		871
897	if (SvROK (coro))	872	if (SvROK (coro))
898	coro = SvRV (coro);	873	coro = SvRV (coro);
899		874
900	LOCK;	875	LOCK;
901	coro_enq (aTHX_ SvREFCNT_inc (coro));	876	coro_enq (SvREFCNT_inc (coro));
902	UNLOCK;	877	UNLOCK;
903	}	878	}
904		879
905	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
906	api_schedule (void)	936	api_schedule (void)
907	{	937	{
908	dTHX;	938	dTHX;
		939	struct transfer_args ta;
909		940
910	SV *prev, *next;	941	prepare_schedule (&ta);
911		942	TRANSFER (ta);
912	LOCK;
913
914	prev = SvRV (GvSV (coro_current));
915	next = coro_deq (aTHX_ PRIO_MIN);
916
917	if (!next)
918	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
919
920	/* free this only after the transfer */
921	coro_mortal = prev;
922	SV_CORO (prev, "Coro::schedule");
923
924	SvRV (GvSV (coro_current)) = next;
925
926	SV_CORO (next, "Coro::schedule");
927
928	UNLOCK;
929
930	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
931	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
932	}	943	}
933		944
934	static void	945	static void
935	api_cede (void)	946	api_cede (void)
936	{	947	{
937	dTHX;	948	dTHX;
		949	struct transfer_args ta;
938		950
939	LOCK;	951	prepare_cede (&ta);
940	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	952	TRANSFER (ta);
941	UNLOCK;
942
943	api_schedule ();
944	}	953	}
945		954
946	MODULE = Coro::State PACKAGE = Coro::State	955	MODULE = Coro::State PACKAGE = Coro::State
947		956
948	PROTOTYPES: ENABLE	957	PROTOTYPES: DISABLE
949		958
950	BOOT:	959	BOOT:
951	{ /* {} necessary for stoopid perl-5.6.x */	960	{
952	#ifdef USE_ITHREADS	961	#ifdef USE_ITHREADS
953	MUTEX_INIT (&coro_mutex);	962	MUTEX_INIT (&coro_mutex);
954	#endif	963	#endif
		964	BOOT_PAGESIZE;
955		965
956	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
957	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
958	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	966	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
959		967
960	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	968	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
961	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	969	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
962	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	970	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
963	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
964		971
965	main_mainstack = PL_mainstack;	972	main_mainstack = PL_mainstack;
966		973
967	coroapi.ver = CORO_API_VERSION;	974	coroapi.ver = CORO_API_VERSION;
968	coroapi.transfer = api_transfer;	975	coroapi.transfer = api_transfer;
969	}
970		976
971	Coro::State	977	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
972	_newprocess(args)	978	}
973	SV * args	979
974	PROTOTYPE: $	980	SV *
		981	new (char *klass, ...)
975	CODE:	982	CODE:
976	Coro__State coro;	983	{
		984	struct coro *coro;
		985	HV *hv;
		986	int i;
977		987
978	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
979	croak ("Coro::State::_newprocess expects an arrayref");
980
981	Newz (0, coro, 1, struct coro);	988	Newz (0, coro, 1, struct coro);
		989	coro->args = newAV ();
982		990
983	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	991	hv = newHV ();
984	/*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;
985	/*coro->stack = 0;*/	993	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
986		994
987	/* same as JMPENV_BOOTSTRAP */	995	for (i = 1; i < items; i++)
988	/* we might be able to recycle start_env, but safe is safe */	996	av_push (coro->args, newSVsv (ST (i)));
989	/*Zero(&coro->start_env, 1, JMPENV);*/	997	}
990	coro->start_env.je_ret = -1;
991	coro->start_env.je_mustcatch = TRUE;
992
993	RETVAL = coro;
994	OUTPUT:	998	OUTPUT:
995	RETVAL	999	RETVAL
996		1000
997	void	1001	void
998	transfer(prev, next, flags)	1002	_set_stacklevel (...)
999	SV *prev	1003	ALIAS:
1000	SV *next	1004	Coro::State::transfer = 1
1001	int flags	1005	Coro::schedule = 2
1002	PROTOTYPE: @	1006	Coro::cede = 3
		1007	Coro::Cont::yield = 4
1003	CODE:	1008	CODE:
1004	PUTBACK;	1009	{
1005	SV_CORO (next, "Coro::transfer");	1010	struct transfer_args ta;
1006	SV_CORO (prev, "Coro::transfer");	1011
1007	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1012	switch (ix)
1008	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	}
1009		1065
1010	void	1066	void
1011	DESTROY(coro)	1067	_clone_state_from (SV *dst, SV *src)
1012	Coro::State coro	1068	CODE:
1013	CODE:	1069	{
		1070	struct coro *coro_src = SvSTATE (src);
1014		1071
1015	if (coro->mainstack && coro->mainstack != main_mainstack)	1072	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1016	{
1017	struct coro temp;
1018		1073
1019	PUTBACK;	1074	++coro_src->refcnt;
1020	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;
1021	LOAD (aTHX_ coro);	1076	}
1022	SPAGAIN;
1023
1024	destroy_stacks (aTHX);
1025
1026	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1027	SPAGAIN;
1028
1029	coro->mainstack = 0;
1030	}
1031
1032	deallocate_stack (coro);
1033	SvREFCNT_dec (coro->args);
1034	Safefree (coro);
1035		1077
1036	void	1078	void
1037	_exit(code)	1079	_exit (code)
1038	int code	1080	int code
1039	PROTOTYPE: $	1081	PROTOTYPE: $
1040	CODE:	1082	CODE:
1041	_exit (code);	1083	_exit (code);
1042		1084
1043	MODULE = Coro::State PACKAGE = Coro::Cont	1085	int
		1086	cctx_count ()
		1087	CODE:
		1088	RETVAL = cctx_count;
		1089	OUTPUT:
		1090	RETVAL
1044		1091
1045	# this is slightly dirty (should expose a c-level api)	1092	int
1046		1093	cctx_idle ()
1047	void	1094	CODE:
1048	yield(...)	1095	RETVAL = cctx_idle;
1049	PROTOTYPE: @	1096	OUTPUT:
1050	CODE:	1097	RETVAL
1051	static SV *returnstk;
1052	SV *sv;
1053	AV *defav = GvAV (PL_defgv);
1054	struct coro *prev, *next;
1055
1056	if (!returnstk)
1057	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1058
1059	/* set up @_ -- ugly */
1060	av_clear (defav);
1061	av_fill (defav, items - 1);
1062	while (items--)
1063	av_store (defav, items, SvREFCNT_inc (ST(items)));
1064
1065	SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1066	sv = av_pop ((AV *)SvRV (returnstk));
1067	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1068	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1069	SvREFCNT_dec (sv);
1070
1071	transfer (aTHX_ prev, next, 0);
1072		1098
1073	MODULE = Coro::State PACKAGE = Coro	1099	MODULE = Coro::State PACKAGE = Coro
1074		1100
1075	# this is slightly dirty (should expose a c-level api)
1076
1077	BOOT:	1101	BOOT:
1078	{	1102	{
1079	int i;	1103	int i;
		1104
1080	HV *stash = gv_stashpv ("Coro", TRUE);	1105	coro_stash = gv_stashpv ("Coro", TRUE);
1081		1106
1082	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1107	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1083	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1108	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1084	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1109	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1085	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1110	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1086	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1111	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1087	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1112	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1088		1113
1089	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1114	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1090	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1115	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1091		1116
1092	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1117	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1100	coroapi.ready = api_ready;	1125	coroapi.ready = api_ready;
1101	coroapi.nready = &coro_nready;	1126	coroapi.nready = &coro_nready;
1102	coroapi.current = coro_current;	1127	coroapi.current = coro_current;
1103		1128
1104	GCoroAPI = &coroapi;	1129	GCoroAPI = &coroapi;
1105	sv_setiv(sv, (IV)&coroapi);	1130	sv_setiv (sv, (IV)&coroapi);
1106	SvREADONLY_on(sv);	1131	SvREADONLY_on (sv);
1107	}	1132	}
1108	}	1133	}
1109		1134
1110	#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	}
1111		1154
1112	void	1155	void
1113	ready(self)	1156	ready (SV *self)
1114	SV * self
1115	PROTOTYPE: $	1157	PROTOTYPE: $
1116	CODE:	1158	CODE:
1117	api_ready (self);	1159	api_ready (self);
1118		1160
1119	#endif
1120
1121	int	1161	int
1122	nready(...)	1162	nready (...)
1123	PROTOTYPE:	1163	PROTOTYPE:
1124	CODE:	1164	CODE:
1125	RETVAL = coro_nready;	1165	RETVAL = coro_nready;
1126	OUTPUT:	1166	OUTPUT:
1127	RETVAL	1167	RETVAL
1128		1168
		1169	MODULE = Coro::State PACKAGE = Coro::AIO
		1170
		1171	SV *
		1172	_get_state ()
		1173	CODE:
		1174	{
		1175	struct {
		1176	int errorno;
		1177	int laststype;
		1178	int laststatval;
		1179	Stat_t statcache;
		1180	} data;
		1181
		1182	data.errorno = errno;
		1183	data.laststype = PL_laststype;
		1184	data.laststatval = PL_laststatval;
		1185	data.statcache = PL_statcache;
		1186
		1187	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1188	}
		1189	OUTPUT:
		1190	RETVAL
		1191
1129	void	1192	void
1130	schedule(...)	1193	_set_state (char *data_)
1131	PROTOTYPE:	1194	PROTOTYPE: $
1132	CODE:	1195	CODE:
1133	api_schedule ();	1196	{
		1197	struct {
		1198	int errorno;
		1199	int laststype;
		1200	int laststatval;
		1201	Stat_t statcache;
		1202	} *data = (void *)data_;
1134		1203
1135	void	1204	errno = data->errorno;
1136	cede(...)	1205	PL_laststype = data->laststype;
1137	PROTOTYPE:	1206	PL_laststatval = data->laststatval;
1138	CODE:	1207	PL_statcache = data->statcache;
1139	api_cede ();	1208	}
1140

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