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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.48 by pcg, Sat Nov 15 03:53:37 2003 UTC vs.
Revision 1.107 by root, Mon Nov 27 02:15:51 2006 UTC

		1	#include "libcoro/coro.c"
		2
1	#include "EXTERN.h"	3	#include "EXTERN.h"
2	#include "perl.h"	4	#include "perl.h"
3	#include "XSUB.h"	5	#include "XSUB.h"
4		6
5	#include "patchlevel.h"	7	#include "patchlevel.h"
6		8
7	#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)
8	# ifndef PL_ppaddr	20	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	21	# define PL_ppaddr ppaddr
10	# endif	22	# endif
11	# ifndef call_sv	23	# ifndef call_sv
12	# define call_sv perl_call_sv	24	# define call_sv perl_call_sv
…		…
23	# ifndef IS_PADCONST	35	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	36	# define IS_PADCONST(v) 0
25	# endif	37	# endif
26	#endif	38	#endif
27		39
28	#include "libcoro/coro.c"
29
30	#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
31		50
32	#ifdef HAVE_MMAP	51	#ifdef HAVE_MMAP
33	# include <unistd.h>	52	# include <unistd.h>
34	# include <sys/mman.h>	53	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
…		…
37	# define MAP_ANONYMOUS MAP_ANON	56	# define MAP_ANONYMOUS MAP_ANON
38	# else	57	# else
39	# undef HAVE_MMAP	58	# undef HAVE_MMAP
40	# endif	59	# endif
41	# 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
42	#endif	68	# endif
43		69	#else
44	#define MAY_FLUSH /* increases codesize and is rarely used */	70	# define PAGESIZE 0
45		71	# define BOOT_PAGESIZE (void)0
46	#define SUB_INIT "Coro::State::initialize"	72	#endif
47	#define UCORO_STATE "_coro_state"
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"
59		91
		92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
		93
		94	#ifdef USE_ITHREADS
		95	static perl_mutex coro_mutex;
		96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		98	#else
		99	# define LOCK (void)0
		100	# define UNLOCK (void)0
		101	#endif
		102
60	static struct CoroAPI coroapi;	103	static struct CoroAPI coroapi;
		104	static AV *main_mainstack; /* used to differentiate between $main and others */
		105	static HV *coro_state_stash, *coro_stash;
		106	static SV *coro_mortal; /* will be freed after next transfer */
61		107
62	/* 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 */
63	typedef struct {	112	typedef struct coro_cctx {
64	int refcnt; /* pointer reference counter */	113	struct coro_cctx *next;
65	int usecnt; /* shared by how many coroutines */
66	int gencnt; /* generation counter */
67		114
68	coro_context cctx;	115	/* the stack */
69
70	void *sptr;	116	void *sptr;
71	long ssize; /* positive == mmap, otherwise malloc */	117	long ssize; /* positive == mmap, otherwise malloc */
72	} coro_stack;
73		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 */
74	struct coro {	130	struct coro {
75	/* the top-level JMPENV for each coroutine, needed to catch dies. */	131	/* the c coroutine allocated to this perl coroutine, if any */
76	JMPENV start_env;	132	coro_cctx *cctx;
77		133
78	/* the optional C context */	134	/* data associated with this coroutine (initial args) */
79	coro_stack *stack;	135	AV *args;
80	void *cursp;
81	int gencnt;	136	int refcnt;
82		137
83	/* optionally saved, might be zero */	138	/* optionally saved, might be zero */
84	AV *defav;	139	AV *defav;
85	SV *defsv;	140	SV *defsv;
86	SV *errsv;	141	SV *errsv;
…		…
95	AV *mainstack;	150	AV *mainstack;
96	SV **stack_sp;	151	SV **stack_sp;
97	OP *op;	152	OP *op;
98	SV **curpad;	153	SV **curpad;
99	AV *comppad;	154	AV *comppad;
		155	CV *compcv;
100	SV **stack_base;	156	SV **stack_base;
101	SV **stack_max;	157	SV **stack_max;
102	SV **tmps_stack;	158	SV **tmps_stack;
103	I32 tmps_floor;	159	I32 tmps_floor;
104	I32 tmps_ix;	160	I32 tmps_ix;
…		…
113	I32 savestack_ix;	169	I32 savestack_ix;
114	I32 savestack_max;	170	I32 savestack_max;
115	OP **retstack;	171	OP **retstack;
116	I32 retstack_ix;	172	I32 retstack_ix;
117	I32 retstack_max;	173	I32 retstack_max;
		174	PMOP *curpm;
118	COP *curcop;	175	COP *curcop;
119	JMPENV *top_env;
120		176
121	/* data associated with this coroutine (initial args) */	177	/* coro process data */
122	AV *args;	178	int prio;
123	};	179	};
124		180
125	typedef struct coro *Coro__State;	181	typedef struct coro *Coro__State;
126	typedef struct coro *Coro__State_or_hashref;	182	typedef struct coro *Coro__State_or_hashref;
127		183
128	static AV *main_mainstack; /* used to differentiate between $main and others */	184	static AV *
129	static HV *coro_state_stash;	185	coro_clone_padlist (CV *cv)
130	static SV *ucoro_state_sv;
131	static U32 ucoro_state_hash;
132	static HV *padlist_cache;
133	static SV *coro_mortal; /* will be freed after next transfer */
134
135	/* mostly copied from op.c:cv_clone2 */
136	STATIC AV *
137	clone_padlist (AV *protopadlist)
138	{	186	{
139	AV *av;	187	AV *padlist = CvPADLIST (cv);
140	I32 ix;
141	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
142	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
143	SV **pname = AvARRAY (protopad_name);
144	SV **ppad = AvARRAY (protopad);
145	I32 fname = AvFILLp (protopad_name);
146	I32 fpad = AvFILLp (protopad);
147	AV *newpadlist, *newpad_name, *newpad;	188	AV *newpadlist, *newpad;
148	SV **npad;
149
150	newpad_name = newAV ();
151	for (ix = fname; ix >= 0; ix--)
152	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
153
154	newpad = newAV ();
155	av_fill (newpad, AvFILLp (protopad));
156	npad = AvARRAY (newpad);
157		189
158	newpadlist = newAV ();	190	newpadlist = newAV ();
159	AvREAL_off (newpadlist);	191	AvREAL_off (newpadlist);
160	av_store (newpadlist, 0, (SV *) newpad_name);	192	#if PERL_VERSION_ATLEAST (5,9,0)
		193	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		194	#else
		195	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		196	#endif
		197	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		198	--AvFILLp (padlist);
		199
		200	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
161	av_store (newpadlist, 1, (SV *) newpad);	201	av_store (newpadlist, 1, (SV *)newpad);
162		202
163	av = newAV (); /* will be @_ */	203	return newpadlist;
164	av_extend (av, 0);	204	}
165	av_store (newpad, 0, (SV *) av);
166	AvFLAGS (av) = AVf_REIFY;
167		205
168	for (ix = fpad; ix > 0; ix--)	206	static void
		207	free_padlist (AV *padlist)
		208	{
		209	/* may be during global destruction */
		210	if (SvREFCNT (padlist))
169	{	211	{
170	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	212	I32 i = AvFILLp (padlist);
171	if (namesv && namesv != &PL_sv_undef)	213	while (i >= 0)
172	{	214	{
173	char *name = SvPVX (namesv); /* XXX */	215	SV **svp = av_fetch (padlist, i--, FALSE);
174	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	216	if (svp)
175	{ /* lexical from outside? */
176	npad[ix] = SvREFCNT_inc (ppad[ix]);
177	}	217	{
178	else
179	{ /* our own lexical */
180	SV *sv;	218	SV *sv;
181	if (*name == '&')	219	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
182	sv = SvREFCNT_inc (ppad[ix]);	220	SvREFCNT_dec (sv);
183	else if (*name == '@')	221
184	sv = (SV *) newAV ();	222	SvREFCNT_dec (*svp);
185	else if (*name == '%')
186	sv = (SV *) newHV ();
187	else
188	sv = NEWSV (0, 0);
189	if (!SvPADBUSY (sv))
190	SvPADMY_on (sv);
191	npad[ix] = sv;
192	}	223	}
193	}	224	}
194	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	225
195	{	226	SvREFCNT_dec ((SV*)padlist);
196	npad[ix] = SvREFCNT_inc (ppad[ix]);
197	}
198	else
199	{
200	SV *sv = NEWSV (0, 0);
201	SvPADTMP_on (sv);
202	npad[ix] = sv;
203	}
204	}	227	}
		228	}
205		229
206	#if 0 /* return -ENOTUNDERSTOOD */	230	static int
207	/* Now that vars are all in place, clone nested closures. */	231	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		232	{
		233	AV *padlist;
		234	AV *av = (AV *)mg->mg_obj;
208		235
209	for (ix = fpad; ix > 0; ix--) {	236	/* casting is fun. */
210	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	237	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
211	if (namesv	238	free_padlist (padlist);
212	&& namesv != &PL_sv_undef	239
213	&& !(SvFLAGS(namesv) & SVf_FAKE)	240	SvREFCNT_dec (av);
214	&& *SvPVX(namesv) == '&'	241
215	&& CvCLONE(ppad[ix]))	242	return 0;
216	{	243	}
217	CV *kid = cv_clone((CV*)ppad[ix]);	244
218	SvREFCNT_dec(ppad[ix]);	245	#define PERL_MAGIC_coro PERL_MAGIC_ext
219	CvCLONE_on(kid);	246
220	SvPADMY_on(kid);	247	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221	npad[ix] = (SV*)kid;	248
222	}	249	/* the next two functions merely cache the padlists */
		250	static void
		251	get_padlist (CV *cv)
		252	{
		253	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		254
		255	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
		256	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
		257	else
		258	{
		259	#if 0
		260	/* this is probably cleaner, but also slower? */
		261	CV *cp = Perl_cv_clone (cv);
		262	CvPADLIST (cv) = CvPADLIST (cp);
		263	CvPADLIST (cp) = 0;
		264	SvREFCNT_dec (cp);
		265	#else
		266	CvPADLIST (cv) = coro_clone_padlist (cv);
		267	#endif
		268	}
		269	}
		270
		271	static void
		272	put_padlist (CV *cv)
		273	{
		274	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		275
		276	if (!mg)
		277	{
		278	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		279	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		280	mg->mg_virtual = &vtbl_coro;
		281	mg->mg_obj = (SV *)newAV ();
223	}	282	}
224	#endif
225		283
226	return newpadlist;
227	}
228
229	#ifdef MAY_FLUSH
230	STATIC void
231	free_padlist (AV *padlist)
232	{
233	/* may be during global destruction */
234	if (SvREFCNT(padlist))
235	{
236	I32 i = AvFILLp(padlist);
237	while (i >= 0)
238	{
239	SV **svp = av_fetch(padlist, i--, FALSE);
240	SV *sv = svp ? *svp : Nullsv;
241	if (sv)
242	SvREFCNT_dec(sv);
243	}
244
245	SvREFCNT_dec((SV*)padlist);
246	}
247	}
248	#endif
249
250	/* the next two functions merely cache the padlists */
251	STATIC void
252	get_padlist (CV *cv)
253	{
254	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
255
256	if (he && AvFILLp ((AV *)*he) >= 0)
257	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
258	else
259	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
260	}
261
262	STATIC void
263	put_padlist (CV *cv)
264	{
265	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
266
267	if (SvTYPE (*he) != SVt_PVAV)
268	{
269	SvREFCNT_dec (*he);
270	*he = (SV *)newAV ();
271	}
272
273	av_push ((AV *)*he, (SV *)CvPADLIST (cv));	284	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
274	}	285	}
275
276	#ifdef MAY_FLUSH
277	STATIC void
278	flush_padlist_cache ()
279	{
280	HV *hv = padlist_cache;
281	padlist_cache = newHV ();
282
283	if (hv_iterinit (hv))
284	{
285	HE *he;
286	AV *padlist;
287
288	while (!!(he = hv_iternext (hv)))
289	{
290	AV *av = (AV *)HeVAL(he);
291
292	/* casting is fun. */
293	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
294	free_padlist (padlist);
295	}
296	}
297
298	SvREFCNT_dec (hv);
299	}
300	#endif
301		286
302	#define SB do {	287	#define SB do {
303	#define SE } while (0)	288	#define SE } while (0)
304		289
305	#define LOAD(state) load_state(aTHX_ (state));	290	#define LOAD(state) load_state((state));
306	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	291	#define SAVE(state,flags) save_state((state),(flags));
307		292
308	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	293	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
309		294
310	static void	295	static void
311	load_state(pTHX_ Coro__State c)	296	load_state(Coro__State c)
312	{	297	{
313	PL_dowarn = c->dowarn;	298	PL_dowarn = c->dowarn;
314	PL_in_eval = c->in_eval;	299	PL_in_eval = c->in_eval;
315		300
316	PL_curstackinfo = c->curstackinfo;	301	PL_curstackinfo = c->curstackinfo;
…		…
318	PL_mainstack = c->mainstack;	303	PL_mainstack = c->mainstack;
319	PL_stack_sp = c->stack_sp;	304	PL_stack_sp = c->stack_sp;
320	PL_op = c->op;	305	PL_op = c->op;
321	PL_curpad = c->curpad;	306	PL_curpad = c->curpad;
322	PL_comppad = c->comppad;	307	PL_comppad = c->comppad;
		308	PL_compcv = c->compcv;
323	PL_stack_base = c->stack_base;	309	PL_stack_base = c->stack_base;
324	PL_stack_max = c->stack_max;	310	PL_stack_max = c->stack_max;
325	PL_tmps_stack = c->tmps_stack;	311	PL_tmps_stack = c->tmps_stack;
326	PL_tmps_floor = c->tmps_floor;	312	PL_tmps_floor = c->tmps_floor;
327	PL_tmps_ix = c->tmps_ix;	313	PL_tmps_ix = c->tmps_ix;
…		…
333	PL_scopestack_ix = c->scopestack_ix;	319	PL_scopestack_ix = c->scopestack_ix;
334	PL_scopestack_max = c->scopestack_max;	320	PL_scopestack_max = c->scopestack_max;
335	PL_savestack = c->savestack;	321	PL_savestack = c->savestack;
336	PL_savestack_ix = c->savestack_ix;	322	PL_savestack_ix = c->savestack_ix;
337	PL_savestack_max = c->savestack_max;	323	PL_savestack_max = c->savestack_max;
		324	#if !PERL_VERSION_ATLEAST (5,9,0)
338	PL_retstack = c->retstack;	325	PL_retstack = c->retstack;
339	PL_retstack_ix = c->retstack_ix;	326	PL_retstack_ix = c->retstack_ix;
340	PL_retstack_max = c->retstack_max;	327	PL_retstack_max = c->retstack_max;
		328	#endif
		329	PL_curpm = c->curpm;
341	PL_curcop = c->curcop;	330	PL_curcop = c->curcop;
342	PL_top_env = c->top_env;
343		331
344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	332	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	333	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
346	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	334	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
347		335
…		…
356		344
357	if (padlist)	345	if (padlist)
358	{	346	{
359	put_padlist (cv); /* mark this padlist as available */	347	put_padlist (cv); /* mark this padlist as available */
360	CvPADLIST(cv) = padlist;	348	CvPADLIST(cv) = padlist;
361	#ifdef USE_THREADS
362	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
363	#endif
364	}	349	}
365		350
366	++CvDEPTH(cv);	351	++CvDEPTH(cv);
367	}	352	}
368		353
369	PUTBACK;	354	PUTBACK;
370	}	355	}
371	}	356	}
372		357
373	static void	358	static void
374	save_state(pTHX_ Coro__State c, int flags)	359	save_state(Coro__State c, int flags)
375	{	360	{
376	{	361	{
377	dSP;	362	dSP;
378	I32 cxix = cxstack_ix;	363	I32 cxix = cxstack_ix;
379	PERL_CONTEXT *ccstk = cxstack;	364	PERL_CONTEXT *ccstk = cxstack;
…		…
395	if (CxTYPE(cx) == CXt_SUB)	380	if (CxTYPE(cx) == CXt_SUB)
396	{	381	{
397	CV *cv = cx->blk_sub.cv;	382	CV *cv = cx->blk_sub.cv;
398	if (CvDEPTH(cv))	383	if (CvDEPTH(cv))
399	{	384	{
400	#ifdef USE_THREADS
401	/*XPUSHs ((SV *)CvOWNER(cv));*/
402	/*CvOWNER(cv) = 0;*/
403	/*error must unlock this cv etc.. etc...*/
404	#endif
405	EXTEND (SP, CvDEPTH(cv)*2);	385	EXTEND (SP, CvDEPTH(cv)*2);
406		386
407	while (--CvDEPTH(cv))	387	while (--CvDEPTH(cv))
408	{	388	{
409	/* this tells the restore code to increment CvDEPTH */	389	/* this tells the restore code to increment CvDEPTH */
…		…
412	}	392	}
413		393
414	PUSHs ((SV *)CvPADLIST(cv));	394	PUSHs ((SV *)CvPADLIST(cv));
415	PUSHs ((SV *)cv);	395	PUSHs ((SV *)cv);
416		396
417	get_padlist (cv); /* this is a monster */	397	get_padlist (cv);
418	}	398	}
419	}	399	}
420	#ifdef CXt_FORMAT	400	#ifdef CXt_FORMAT
421	else if (CxTYPE(cx) == CXt_FORMAT)	401	else if (CxTYPE(cx) == CXt_FORMAT)
422	{	402	{
…		…
450	c->mainstack = PL_mainstack;	430	c->mainstack = PL_mainstack;
451	c->stack_sp = PL_stack_sp;	431	c->stack_sp = PL_stack_sp;
452	c->op = PL_op;	432	c->op = PL_op;
453	c->curpad = PL_curpad;	433	c->curpad = PL_curpad;
454	c->comppad = PL_comppad;	434	c->comppad = PL_comppad;
		435	c->compcv = PL_compcv;
455	c->stack_base = PL_stack_base;	436	c->stack_base = PL_stack_base;
456	c->stack_max = PL_stack_max;	437	c->stack_max = PL_stack_max;
457	c->tmps_stack = PL_tmps_stack;	438	c->tmps_stack = PL_tmps_stack;
458	c->tmps_floor = PL_tmps_floor;	439	c->tmps_floor = PL_tmps_floor;
459	c->tmps_ix = PL_tmps_ix;	440	c->tmps_ix = PL_tmps_ix;
…		…
465	c->scopestack_ix = PL_scopestack_ix;	446	c->scopestack_ix = PL_scopestack_ix;
466	c->scopestack_max = PL_scopestack_max;	447	c->scopestack_max = PL_scopestack_max;
467	c->savestack = PL_savestack;	448	c->savestack = PL_savestack;
468	c->savestack_ix = PL_savestack_ix;	449	c->savestack_ix = PL_savestack_ix;
469	c->savestack_max = PL_savestack_max;	450	c->savestack_max = PL_savestack_max;
		451	#if !PERL_VERSION_ATLEAST (5,9,0)
470	c->retstack = PL_retstack;	452	c->retstack = PL_retstack;
471	c->retstack_ix = PL_retstack_ix;	453	c->retstack_ix = PL_retstack_ix;
472	c->retstack_max = PL_retstack_max;	454	c->retstack_max = PL_retstack_max;
		455	#endif
		456	c->curpm = PL_curpm;
473	c->curcop = PL_curcop;	457	c->curcop = PL_curcop;
474	c->top_env = PL_top_env;
475	}	458	}
476		459
477	/*	460	/*
478	* allocate various perl stacks. This is an exact copy	461	* allocate various perl stacks. This is an exact copy
479	* of perl.c:init_stacks, except that it uses less memory	462	* of perl.c:init_stacks, except that it uses less memory
480	* on the assumption that coroutines do not usually need	463	* on the (sometimes correct) assumption that coroutines do
481	* a lot of stackspace.	464	* not usually need a lot of stackspace.
482	*/	465	*/
483	STATIC void	466	static void
484	coro_init_stacks (pTHX)	467	coro_init_stacks ()
485	{	468	{
486	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	469	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
487	PL_curstackinfo->si_type = PERLSI_MAIN;	470	PL_curstackinfo->si_type = PERLSI_MAIN;
488	PL_curstack = PL_curstackinfo->si_stack;	471	PL_curstack = PL_curstackinfo->si_stack;
489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	472	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
511		494
512	New(54,PL_savestack,96,ANY);	495	New(54,PL_savestack,96,ANY);
513	PL_savestack_ix = 0;	496	PL_savestack_ix = 0;
514	PL_savestack_max = 96;	497	PL_savestack_max = 96;
515		498
		499	#if !PERL_VERSION_ATLEAST (5,9,0)
516	New(54,PL_retstack,8,OP*);	500	New(54,PL_retstack,8,OP*);
517	PL_retstack_ix = 0;	501	PL_retstack_ix = 0;
518	PL_retstack_max = 8;	502	PL_retstack_max = 8;
		503	#endif
519	}	504	}
520		505
521	/*	506	/*
522	* destroy the stacks, the callchain etc...	507	* destroy the stacks, the callchain etc...
523	*/	508	*/
524	STATIC void	509	static void
525	destroy_stacks(pTHX)	510	coro_destroy_stacks ()
526	{	511	{
527	if (!IN_DESTRUCT)	512	if (!IN_DESTRUCT)
528	{	513	{
529	/* is this ugly, I ask? */	514	/* is this ugly, I ask? */
530	while (PL_scopestack_ix)	515	LEAVE_SCOPE (0);
531	LEAVE;
532		516
533	/* sure it is, but more important: is it correct?? :/ */	517	/* sure it is, but more important: is it correct?? :/ */
534	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
535	FREETMPS;	518	FREETMPS;
		519
		520	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
536	}	521	}
537		522
538	while (PL_curstackinfo->si_next)	523	while (PL_curstackinfo->si_next)
539	PL_curstackinfo = PL_curstackinfo->si_next;	524	PL_curstackinfo = PL_curstackinfo->si_next;
540		525
541	while (PL_curstackinfo)	526	while (PL_curstackinfo)
542	{	527	{
543	PERL_SI *p = PL_curstackinfo->si_prev;	528	PERL_SI *p = PL_curstackinfo->si_prev;
544		529
545	{	530	{ /*D*//*remove*/
546	dSP;	531	dSP;
547	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	532	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
548	PUTBACK; /* possibly superfluous */	533	PUTBACK; /* possibly superfluous */
549	}	534	}
550		535
551	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
552	{	537	{
553	dounwind(-1);	538	dounwind (-1);/*D*//*remove*/
554	SvREFCNT_dec(PL_curstackinfo->si_stack);	539	SvREFCNT_dec (PL_curstackinfo->si_stack);
555	}	540	}
556		541
557	Safefree(PL_curstackinfo->si_cxstack);	542	Safefree (PL_curstackinfo->si_cxstack);
558	Safefree(PL_curstackinfo);	543	Safefree (PL_curstackinfo);
559	PL_curstackinfo = p;	544	PL_curstackinfo = p;
560	}	545	}
561		546
562	Safefree(PL_tmps_stack);	547	Safefree (PL_tmps_stack);
563	Safefree(PL_markstack);	548	Safefree (PL_markstack);
564	Safefree(PL_scopestack);	549	Safefree (PL_scopestack);
565	Safefree(PL_savestack);	550	Safefree (PL_savestack);
		551	#if !PERL_VERSION_ATLEAST (5,9,0)
566	Safefree(PL_retstack);	552	Safefree (PL_retstack);
567	}
568
569	static void
570	allocate_stack (Coro__State ctx, int alloc)
571	{
572	coro_stack *stack;
573
574	New (0, stack, 1, coro_stack);
575
576	stack->refcnt = 1;
577	stack->usecnt = 1;
578	stack->gencnt = ctx->gencnt = 0;
579	if (alloc)
580	{
581	#if HAVE_MMAP
582	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
583	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
584	if (stack->sptr == (void *)-1)
585	#endif	553	#endif
586	{
587	/*FIXME*//*D*//* reasonable stack size! */
588	stack->ssize = -4096 * sizeof (long);
589	New (0, stack->sptr, 4096, long);
590	}
591	}
592	else
593	stack->sptr = 0;
594
595	ctx->stack = stack;
596	}	554	}
597		555
598	static void	556	static void
599	deallocate_stack (Coro__State ctx)	557	setup_coro (struct coro *coro)
600	{
601	coro_stack *stack = ctx->stack;
602
603	ctx->stack = 0;
604
605	if (stack)
606	{
607	if (!--stack->refcnt)
608	{
609	#ifdef HAVE_MMAP
610	if (stack->ssize > 0 && stack->sptr)
611	munmap (stack->sptr, stack->ssize);
612	else
613	#endif
614	Safefree (stack->sptr);
615
616	Safefree (stack);
617	}
618	else if (ctx->gencnt == stack->gencnt)
619	--stack->usecnt;
620	}
621	}
622
623	static void
624	setup_coro (void *arg)
625	{	558	{
626	/*	559	/*
627	* emulate part of the perl startup here.	560	* emulate part of the perl startup here.
628	*/	561	*/
629	dSP;
630	Coro__State ctx = (Coro__State)arg;
631	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
632		562
633	coro_init_stacks (aTHX);	563	coro_init_stacks ();
		564
634	/*PL_curcop = 0;*/	565	PL_curcop = 0;
635	/*PL_in_eval = PL_in_eval;*/ /* inherit */	566	PL_in_eval = 0;
		567	PL_curpm = 0;
		568
		569	{
		570	dSP;
		571	LOGOP myop;
		572
		573	/* I have no idea why this is needed, but it is */
		574	PUSHMARK (SP);
		575
636	SvREFCNT_dec (GvAV (PL_defgv));	576	SvREFCNT_dec (GvAV (PL_defgv));
637	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	577	GvAV (PL_defgv) = coro->args; coro->args = 0;
638		578
639	SPAGAIN;
640
641	if (ctx->stack)
642	{
643	ctx->cursp = 0;
644
645	PUSHMARK(SP);
646	PUTBACK;
647	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
648
649	if (SvTRUE (ERRSV))
650	croak (NULL);
651	else
652	croak ("FATAL: CCTXT coroutine returned!");
653	}
654	else
655	{
656	UNOP myop;
657
658	PL_op = (OP *)&myop;
659
660	Zero(&myop, 1, UNOP);	579	Zero (&myop, 1, LOGOP);
661	myop.op_next = Nullop;	580	myop.op_next = Nullop;
662	myop.op_flags = OPf_WANT_VOID;	581	myop.op_flags = OPf_WANT_VOID;
663		582
		583	PL_op = (OP *)&myop;
		584
664	PUSHMARK(SP);	585	PUSHMARK (SP);
665	XPUSHs (sub_init);	586	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
666	/*
667	* the next line is slightly wrong, as PL_op->op_next
668	* is actually being executed so we skip the first op.
669	* that doesn't matter, though, since it is only
670	* pp_nextstate and we never return...
671	* ah yes, and I don't care anyways ;)
672	*/
673	PUTBACK;	587	PUTBACK;
674	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	588	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
675	SPAGAIN;	589	SPAGAIN;
676		590
677	ENTER; /* necessary e.g. for dounwind */	591	ENTER; /* necessary e.g. for dounwind */
678	}	592	}
679	}	593	}
680		594
681	static void	595	static void
682	continue_coro (void *arg)	596	free_coro_mortal ()
683	{	597	{
684	/*
685	* this is a _very_ stripped down perl interpreter ;)
686	*/
687	Coro__State ctx = (Coro__State)arg;
688	JMPENV coro_start_env;
689
690	PL_top_env = &ctx->start_env;
691
692	ctx->cursp = 0;
693	PL_op = PL_op->op_next;
694	CALLRUNOPS(aTHX);
695
696	abort ();
697	}
698
699	STATIC void
700	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
701	{
702	dSTACKLEVEL;
703	static struct coro *xnext;
704
705	if (prev != next)
706	{
707	xnext = next;
708
709	if (next->mainstack)
710	{
711	SAVE (prev, flags);
712	LOAD (next);
713
714	/* mark this state as in-use */
715	next->mainstack = 0;
716	next->tmps_ix = -2;
717
718	/* stacklevel changed? if yes, grab the stack for us! */
719	if (flags & TRANSFER_SAVE_CCTXT)
720	{
721	if (!prev->stack)
722	allocate_stack (prev, 0);
723	else if (prev->cursp != stacklevel
724	&& prev->stack->usecnt > 1)
725	{
726	prev->gencnt = ++prev->stack->gencnt;
727	prev->stack->usecnt = 1;
728	}
729
730	/* has our stack been invalidated? */
731	if (next->stack && next->stack->gencnt != next->gencnt)
732	{
733	deallocate_stack (next);
734	allocate_stack (next, 1);
735	coro_create (&(next->stack->cctx),
736	continue_coro, (void *)next,
737	next->stack->sptr, labs (next->stack->ssize));
738	}
739
740	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
741	/* don't add any code here */
742	}
743
744	}
745	else if (next->tmps_ix == -2)
746	croak ("tried to transfer to running coroutine");
747	else
748	{
749	SAVE (prev, -1); /* first get rid of the old state */
750
751	if (flags & TRANSFER_SAVE_CCTXT)
752	{
753	if (!prev->stack)
754	allocate_stack (prev, 0);
755
756	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
757	{
758	PL_top_env = &next->start_env;
759
760	setup_coro (next);
761
762	prev->stack->refcnt++;
763	prev->stack->usecnt++;
764	next->stack = prev->stack;
765	next->gencnt = prev->gencnt;
766	}
767	else
768	{
769	assert (!next->stack);
770	allocate_stack (next, 1);
771	coro_create (&(next->stack->cctx),
772	setup_coro, (void *)next,
773	next->stack->sptr, labs (next->stack->ssize));
774	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
775	/* don't add any code here */
776	}
777	}
778	else
779	setup_coro (next);
780	}
781
782	/*
783	* xnext is now either prev or next, depending on wether
784	* we switched the c stack or not. that's why I use a global
785	* variable, that should become thread-specific at one point.
786	*/
787	xnext->cursp = stacklevel;
788	}
789
790	if (coro_mortal)	598	if (coro_mortal)
791	{	599	{
792	SvREFCNT_dec (coro_mortal);	600	SvREFCNT_dec (coro_mortal);
793	coro_mortal = 0;	601	coro_mortal = 0;
794	}	602	}
795	}	603	}
796		604
797	#define SV_CORO(sv,func) \	605	static void NOINLINE
798	do { \	606	prepare_cctx (coro_cctx *cctx)
799	if (SvROK (sv)) \	607	{
800	sv = SvRV (sv); \	608	dSP;
801	\	609	LOGOP myop;
802	if (SvTYPE(sv) == SVt_PVHV) \
803	{ \
804	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
805	\
806	if (!he) \
807	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
808	\
809	(sv) = SvRV (HeVAL(he)); \
810	} \
811	\
812	/* must also be changed inside Coro::Cont::yield */ \
813	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
814	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
815	\
816	} while(0)
817		610
818	#define SvSTATE(sv) (struct coro *)SvIV (sv)	611	Zero (&myop, 1, LOGOP);
		612	myop.op_next = PL_op;
		613	myop.op_flags = OPf_WANT_VOID;
819		614
		615	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		616
		617	PUSHMARK (SP);
		618	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		619	PUTBACK;
		620	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		621	SPAGAIN;
		622	}
		623
		624	static void
		625	coro_run (void *arg)
		626	{
		627	/* coro_run is the alternative epilogue of transfer() */
		628	UNLOCK;
		629
		630	/*
		631	* this is a _very_ stripped down perl interpreter ;)
		632	*/
		633	PL_top_env = &PL_start_env;
		634
		635	/* inject call to cctx_init */
		636	prepare_cctx ((coro_cctx *)arg);
		637
		638	/* somebody will hit me for both perl_run and PL_restartop */
		639	perl_run (PL_curinterp);
		640
		641	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		642	abort ();
		643	}
		644
		645	static coro_cctx *
		646	cctx_new ()
		647	{
		648	coro_cctx *cctx;
		649
		650	++cctx_count;
		651
		652	New (0, cctx, 1, coro_cctx);
		653
		654	#if HAVE_MMAP
		655
		656	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		657	/* mmap suppsedly does allocate-on-write for us */
		658	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		659
		660	if (cctx->sptr == (void *)-1)
		661	{
		662	perror ("FATAL: unable to mmap stack for coroutine");
		663	_exit (EXIT_FAILURE);
		664	}
		665
		666	# if STACKGUARD
		667	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		668	# endif
		669
		670	#else
		671
		672	cctx->ssize = STACKSIZE * (long)sizeof (long);
		673	New (0, cctx->sptr, STACKSIZE, long);
		674
		675	if (!cctx->sptr)
		676	{
		677	perror ("FATAL: unable to malloc stack for coroutine");
		678	_exit (EXIT_FAILURE);
		679	}
		680
		681	#endif
		682
		683	#if USE_VALGRIND
		684	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		685	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		686	cctx->ssize + (char *)cctx->sptr
		687	);
		688	#endif
		689
		690	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		691
		692	return cctx;
		693	}
		694
		695	static void
		696	cctx_free (coro_cctx *cctx)
		697	{
		698	if (!cctx)
		699	return;
		700
		701	--cctx_count;
		702
		703	#if USE_VALGRIND
		704	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		705	#endif
		706
		707	#if HAVE_MMAP
		708	munmap (cctx->sptr, cctx->ssize);
		709	#else
		710	Safefree (cctx->sptr);
		711	#endif
		712
		713	Safefree (cctx);
		714	}
		715
		716	static coro_cctx *
		717	cctx_get ()
		718	{
		719	coro_cctx *cctx;
		720
		721	if (cctx_first)
		722	{
		723	--cctx_idle;
		724	cctx = cctx_first;
		725	cctx_first = cctx->next;
		726	}
		727	else
		728	{
		729	cctx = cctx_new ();
		730	PL_op = PL_op->op_next;
		731	}
		732
		733	return cctx;
		734	}
		735
		736	static void
		737	cctx_put (coro_cctx *cctx)
		738	{
		739	++cctx_idle;
		740	cctx->next = cctx_first;
		741	cctx_first = cctx;
		742	}
		743
		744	/* never call directly, always through the coro_state_transfer global variable */
		745	static void NOINLINE
		746	transfer (struct coro *prev, struct coro *next, int flags)
		747	{
		748	dSTACKLEVEL;
		749
		750	/* sometimes transfer is only called to set idle_sp */
		751	if (flags == TRANSFER_SET_STACKLEVEL)
		752	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		753	else if (prev != next)
		754	{
		755	coro_cctx *prev__cctx;
		756
		757	LOCK;
		758
		759	if (next->mainstack)
		760	{
		761	/* coroutine already started */
		762	SAVE (prev, flags);
		763	LOAD (next);
		764	}
		765	else
		766	{
		767	/* need to start coroutine */
		768	/* first get rid of the old state */
		769	SAVE (prev, -1);
		770	/* setup coroutine call */
		771	setup_coro (next);
		772	/* need a stack */
		773	next->cctx = 0;
		774	}
		775
		776	if (!prev->cctx)
		777	/* create a new empty context */
		778	Newz (0, prev->cctx, 1, coro_cctx);
		779
		780	prev__cctx = prev->cctx;
		781
		782	/* possibly "free" the cctx */
		783	if (prev__cctx->idle_sp == STACKLEVEL)
		784	{
		785	cctx_put (prev__cctx);
		786	prev->cctx = 0;
		787	}
		788
		789	if (!next->cctx)
		790	next->cctx = cctx_get ();
		791
		792	if (prev__cctx != next->cctx)
		793	{
		794	prev__cctx->top_env = PL_top_env;
		795	PL_top_env = next->cctx->top_env;
		796	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		797	}
		798
		799	free_coro_mortal ();
		800
		801	UNLOCK;
		802	}
		803	}
		804
		805	struct transfer_args
		806	{
		807	struct coro *prev, *next;
		808	int flags;
		809	};
		810
		811	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		812
		813	static void
		814	coro_state_destroy (struct coro *coro)
		815	{
		816	if (coro->refcnt--)
		817	return;
		818
		819	if (coro->mainstack && coro->mainstack != main_mainstack)
		820	{
		821	struct coro temp;
		822
		823	SAVE ((&temp), TRANSFER_SAVE_ALL);
		824	LOAD (coro);
		825
		826	coro_destroy_stacks ();
		827
		828	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		829
		830	coro->mainstack = 0;
		831	}
		832
		833	cctx_free (coro->cctx);
		834	SvREFCNT_dec (coro->args);
		835	Safefree (coro);
		836	}
		837
820	static void	838	static int
		839	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		840	{
		841	struct coro *coro = (struct coro *)mg->mg_ptr;
		842	mg->mg_ptr = 0;
		843
		844	coro_state_destroy (coro);
		845
		846	return 0;
		847	}
		848
		849	static int
		850	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		851	{
		852	struct coro *coro = (struct coro *)mg->mg_ptr;
		853
		854	++coro->refcnt;
		855
		856	return 0;
		857	}
		858
		859	static MGVTBL coro_state_vtbl = {
		860	0, 0, 0, 0,
		861	coro_state_clear,
		862	0,
		863	#ifdef MGf_DUP
		864	coro_state_dup,
		865	#else
		866	# define MGf_DUP 0
		867	#endif
		868	};
		869
		870	static struct coro *
		871	SvSTATE (SV *coro)
		872	{
		873	HV *stash;
		874	MAGIC *mg;
		875
		876	if (SvROK (coro))
		877	coro = SvRV (coro);
		878
		879	stash = SvSTASH (coro);
		880	if (stash != coro_stash && stash != coro_state_stash)
		881	{
		882	/* very slow, but rare, check */
		883	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		884	croak ("Coro::State object required");
		885	}
		886
		887	mg = SvMAGIC (coro);
		888	assert (mg->mg_type == PERL_MAGIC_ext);
		889	return (struct coro *)mg->mg_ptr;
		890	}
		891
		892	static void
		893	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		894	{
		895	ta->prev = SvSTATE (prev);
		896	ta->next = SvSTATE (next);
		897	ta->flags = flags;
		898	}
		899
		900	static void
821	api_transfer(pTHX_ SV *prev, SV *next, int flags)	901	api_transfer (SV *prev, SV *next, int flags)
822	{	902	{
823	SV_CORO (prev, "Coro::transfer");	903	dTHX;
824	SV_CORO (next, "Coro::transfer");	904	struct transfer_args ta;
825		905
826	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	906	prepare_transfer (&ta, prev, next, flags);
		907	TRANSFER (ta);
827	}	908	}
828		909
829	/** Coro ********************************************************************/	910	/** Coro ********************************************************************/
830		911
831	#define PRIO_MAX 3	912	#define PRIO_MAX 3
…		…
835	#define PRIO_IDLE -3	916	#define PRIO_IDLE -3
836	#define PRIO_MIN -4	917	#define PRIO_MIN -4
837		918
838	/* for Coro.pm */	919	/* for Coro.pm */
839	static GV *coro_current, *coro_idle;	920	static GV *coro_current, *coro_idle;
840	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	921	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
841	static int coro_nready;	922	static int coro_nready;
842		923
843	static void	924	static void
844	coro_enq (SV *sv)	925	coro_enq (SV *sv)
845	{	926	{
		927	int prio;
		928
846	if (SvTYPE (sv) == SVt_PVHV)	929	if (SvTYPE (sv) != SVt_PVHV)
847	{
848	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
849	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
850
851	prio = prio > PRIO_MAX ? PRIO_MAX
852	: prio < PRIO_MIN ? PRIO_MIN
853	: prio;
854
855	av_push (coro_ready [prio - PRIO_MIN], sv);
856	coro_nready++;
857
858	return;
859	}
860
861	croak ("Coro::ready tried to enqueue something that is not a coroutine");	930	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		931
		932	prio = SvSTATE (sv)->prio;
		933
		934	av_push (coro_ready [prio - PRIO_MIN], sv);
		935	coro_nready++;
862	}	936	}
863		937
864	static SV *	938	static SV *
865	coro_deq (int min_prio)	939	coro_deq (int min_prio)
866	{	940	{
…		…
869	min_prio -= PRIO_MIN;	943	min_prio -= PRIO_MIN;
870	if (min_prio < 0)	944	if (min_prio < 0)
871	min_prio = 0;	945	min_prio = 0;
872		946
873	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	947	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
874	if (av_len (coro_ready[prio]) >= 0)	948	if (AvFILLp (coro_ready [prio]) >= 0)
875	{	949	{
876	coro_nready--;	950	coro_nready--;
877	return av_shift (coro_ready[prio]);	951	return av_shift (coro_ready [prio]);
878	}	952	}
879		953
880	return 0;	954	return 0;
881	}	955	}
882		956
883	static void	957	static void
884	api_ready (SV *coro)	958	api_ready (SV *coro)
885	{	959	{
		960	dTHX;
		961
886	if (SvROK (coro))	962	if (SvROK (coro))
887	coro = SvRV (coro);	963	coro = SvRV (coro);
888		964
		965	LOCK;
889	coro_enq (SvREFCNT_inc (coro));	966	coro_enq (SvREFCNT_inc (coro));
		967	UNLOCK;
		968	}
		969
		970	static void
		971	prepare_schedule (struct transfer_args *ta)
		972	{
		973	SV *current, *prev, *next;
		974
		975	current = GvSV (coro_current);
		976
		977	for (;;)
		978	{
		979	LOCK;
		980	next = coro_deq (PRIO_MIN);
		981	UNLOCK;
		982
		983	if (next)
		984	break;
		985
		986	{
		987	dSP;
		988
		989	ENTER;
		990	SAVETMPS;
		991
		992	PUSHMARK (SP);
		993	PUTBACK;
		994	call_sv (GvSV (coro_idle), G_DISCARD);
		995
		996	FREETMPS;
		997	LEAVE;
		998	}
		999	}
		1000
		1001	prev = SvRV (current);
		1002	SvRV (current) = next;
		1003
		1004	/* free this only after the transfer */
		1005	LOCK;
		1006	free_coro_mortal ();
		1007	UNLOCK;
		1008	coro_mortal = prev;
		1009
		1010	ta->prev = SvSTATE (prev);
		1011	ta->next = SvSTATE (next);
		1012	ta->flags = TRANSFER_SAVE_ALL;
		1013	}
		1014
		1015	static void
		1016	prepare_cede (struct transfer_args *ta)
		1017	{
		1018	LOCK;
		1019	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		1020	UNLOCK;
		1021
		1022	prepare_schedule (ta);
890	}	1023	}
891		1024
892	static void	1025	static void
893	api_schedule (void)	1026	api_schedule (void)
894	{	1027	{
895	SV *prev, *next;	1028	dTHX;
		1029	struct transfer_args ta;
896		1030
897	prev = SvRV (GvSV (coro_current));	1031	prepare_schedule (&ta);
898	next = coro_deq (PRIO_MIN);	1032	TRANSFER (ta);
899
900	if (!next)
901	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
902
903	/* free this only after the transfer */
904	coro_mortal = prev;
905	SV_CORO (prev, "Coro::schedule");
906
907	SvRV (GvSV (coro_current)) = next;
908
909	SV_CORO (next, "Coro::schedule");
910
911	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
912	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
913	}	1033	}
914		1034
915	static void	1035	static void
916	api_cede (void)	1036	api_cede (void)
917	{	1037	{
918	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1038	dTHX;
		1039	struct transfer_args ta;
919		1040
920	api_schedule ();	1041	prepare_cede (&ta);
		1042	TRANSFER (ta);
921	}	1043	}
922		1044
923	MODULE = Coro::State PACKAGE = Coro::State	1045	MODULE = Coro::State PACKAGE = Coro::State
924		1046
925	PROTOTYPES: ENABLE	1047	PROTOTYPES: DISABLE
926		1048
927	BOOT:	1049	BOOT:
928	{ /* {} necessary for stoopid perl-5.6.x */	1050	{
929	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1051	#ifdef USE_ITHREADS
930	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1052	MUTEX_INIT (&coro_mutex);
		1053	#endif
		1054	BOOT_PAGESIZE;
		1055
931	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1056	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
932		1057
933	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1058	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
934	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1059	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
935	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1060	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
936	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
937
938	if (!padlist_cache)
939	padlist_cache = newHV ();
940		1061
941	main_mainstack = PL_mainstack;	1062	main_mainstack = PL_mainstack;
942		1063
943	coroapi.ver = CORO_API_VERSION;	1064	coroapi.ver = CORO_API_VERSION;
944	coroapi.transfer = api_transfer;	1065	coroapi.transfer = api_transfer;
945	}
946		1066
947	Coro::State	1067	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
948	_newprocess(args)	1068	}
949	SV * args	1069
950	PROTOTYPE: $	1070	SV *
		1071	new (char *klass, ...)
951	CODE:	1072	CODE:
952	Coro__State coro;	1073	{
		1074	struct coro *coro;
		1075	HV *hv;
		1076	int i;
953		1077
954	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
955	croak ("Coro::State::_newprocess expects an arrayref");
956
957	Newz (0, coro, 1, struct coro);	1078	Newz (0, coro, 1, struct coro);
		1079	coro->args = newAV ();
958		1080
959	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1081	hv = newHV ();
960	coro->mainstack = 0; /* actual work is done inside transfer */	1082	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
961	coro->stack = 0;	1083	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
962		1084
963	/* same as JMPENV_BOOTSTRAP */	1085	for (i = 1; i < items; i++)
964	/* we might be able to recycle start_env, but safe is safe */	1086	av_push (coro->args, newSVsv (ST (i)));
965	//Zero(&coro->start_env, 1, JMPENV);	1087	}
966	coro->start_env.je_ret = -1;
967	coro->start_env.je_mustcatch = TRUE;
968
969	RETVAL = coro;
970	OUTPUT:	1088	OUTPUT:
971	RETVAL	1089	RETVAL
972		1090
973	void	1091	void
974	transfer(prev, next, flags)	1092	_set_stacklevel (...)
975	SV *prev	1093	ALIAS:
976	SV *next	1094	Coro::State::transfer = 1
977	int flags	1095	Coro::schedule = 2
978	PROTOTYPE: @	1096	Coro::cede = 3
		1097	Coro::Cont::yield = 4
979	CODE:	1098	CODE:
980	PUTBACK;	1099	{
981	SV_CORO (next, "Coro::transfer");	1100	struct transfer_args ta;
982	SV_CORO (prev, "Coro::transfer");	1101
983	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1102	switch (ix)
984	SPAGAIN;	1103	{
		1104	case 0:
		1105	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1106	ta.next = 0;
		1107	ta.flags = TRANSFER_SET_STACKLEVEL;
		1108	break;
		1109
		1110	case 1:
		1111	if (items != 3)
		1112	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1113
		1114	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1115	break;
		1116
		1117	case 2:
		1118	prepare_schedule (&ta);
		1119	break;
		1120
		1121	case 3:
		1122	prepare_cede (&ta);
		1123	break;
		1124
		1125	case 4:
		1126	{
		1127	SV *yieldstack;
		1128	SV *sv;
		1129	AV *defav = GvAV (PL_defgv);
		1130
		1131	yieldstack = *hv_fetch (
		1132	(HV *)SvRV (GvSV (coro_current)),
		1133	"yieldstack", sizeof ("yieldstack") - 1,
		1134	0
		1135	);
		1136
		1137	/* set up @_ -- ugly */
		1138	av_clear (defav);
		1139	av_fill (defav, items - 1);
		1140	while (items--)
		1141	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1142
		1143	sv = av_pop ((AV *)SvRV (yieldstack));
		1144	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1145	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1146	ta.flags = 0;
		1147	SvREFCNT_dec (sv);
		1148	}
		1149	break;
		1150
		1151	}
		1152
		1153	TRANSFER (ta);
		1154	}
985		1155
986	void	1156	void
987	DESTROY(coro)	1157	_clone_state_from (SV *dst, SV *src)
988	Coro::State coro	1158	CODE:
989	CODE:	1159	{
		1160	struct coro *coro_src = SvSTATE (src);
990		1161
991	if (coro->mainstack && coro->mainstack != main_mainstack)	1162	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
992	{
993	struct coro temp;
994		1163
995	PUTBACK;	1164	++coro_src->refcnt;
996	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1165	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
997	LOAD(aTHX_ coro);	1166	}
998	SPAGAIN;
999
1000	destroy_stacks (aTHX);
1001
1002	LOAD((&temp)); /* this will get rid of defsv etc.. */
1003	SPAGAIN;
1004
1005	coro->mainstack = 0;
1006	}
1007
1008	deallocate_stack (coro);
1009	SvREFCNT_dec (coro->args);
1010	Safefree (coro);
1011		1167
1012	void	1168	void
1013	flush()
1014	CODE:
1015	#ifdef MAY_FLUSH
1016	flush_padlist_cache ();
1017	#endif
1018
1019	void
1020	_exit(code)	1169	_exit (code)
1021	int code	1170	int code
1022	PROTOTYPE: $	1171	PROTOTYPE: $
1023	CODE:	1172	CODE:
1024	#if defined(__GLIBC__) || _POSIX_C_SOURCE
1025	_exit (code);	1173	_exit (code);
1026	#else
1027	signal (SIGTERM, SIG_DFL);
1028	raise (SIGTERM);
1029	exit (code);
1030	#endif
1031		1174
1032	MODULE = Coro::State PACKAGE = Coro::Cont	1175	int
		1176	cctx_count ()
		1177	CODE:
		1178	RETVAL = cctx_count;
		1179	OUTPUT:
		1180	RETVAL
1033		1181
1034	# this is slightly dirty (should expose a c-level api)	1182	int
1035		1183	cctx_idle ()
1036	void	1184	CODE:
1037	yield(...)	1185	RETVAL = cctx_idle;
1038	PROTOTYPE: @	1186	OUTPUT:
1039	CODE:	1187	RETVAL
1040	static SV *returnstk;
1041	SV *sv;
1042	AV *defav = GvAV (PL_defgv);
1043	struct coro *prev, *next;
1044
1045	if (!returnstk)
1046	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1047
1048	/* set up @_ -- ugly */
1049	av_clear (defav);
1050	av_fill (defav, items - 1);
1051	while (items--)
1052	av_store (defav, items, SvREFCNT_inc (ST(items)));
1053
1054	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1055	sv = av_pop ((AV *)SvRV (returnstk));
1056	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1057	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1058	SvREFCNT_dec (sv);
1059
1060	transfer(aTHX_ prev, next, 0);
1061		1188
1062	MODULE = Coro::State PACKAGE = Coro	1189	MODULE = Coro::State PACKAGE = Coro
1063		1190
1064	# this is slightly dirty (should expose a c-level api)
1065
1066	BOOT:	1191	BOOT:
1067	{	1192	{
1068	int i;	1193	int i;
		1194
1069	HV *stash = gv_stashpv ("Coro", TRUE);	1195	coro_stash = gv_stashpv ("Coro", TRUE);
1070		1196
1071	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1197	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1198	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1199	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1200	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1201	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1202	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1077		1203
1078	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1204	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1079	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1205	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1080		1206
1081	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1207	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1089	coroapi.ready = api_ready;	1215	coroapi.ready = api_ready;
1090	coroapi.nready = &coro_nready;	1216	coroapi.nready = &coro_nready;
1091	coroapi.current = coro_current;	1217	coroapi.current = coro_current;
1092		1218
1093	GCoroAPI = &coroapi;	1219	GCoroAPI = &coroapi;
1094	sv_setiv(sv, (IV)&coroapi);	1220	sv_setiv (sv, (IV)&coroapi);
1095	SvREADONLY_on(sv);	1221	SvREADONLY_on (sv);
1096	}	1222	}
1097	}	1223	}
1098		1224
		1225	int
		1226	prio (Coro::State coro, int newprio = 0)
		1227	ALIAS:
		1228	nice = 1
		1229	CODE:
		1230	{
		1231	RETVAL = coro->prio;
		1232
		1233	if (items > 1)
		1234	{
		1235	if (ix)
		1236	newprio += coro->prio;
		1237
		1238	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1239	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1240
		1241	coro->prio = newprio;
		1242	}
		1243	}
		1244
1099	void	1245	void
1100	ready(self)	1246	ready (SV *self)
1101	SV * self
1102	PROTOTYPE: $	1247	PROTOTYPE: $
1103	CODE:	1248	CODE:
1104	api_ready (self);	1249	api_ready (self);
1105		1250
1106	int	1251	int
1107	nready(...)	1252	nready (...)
1108	PROTOTYPE:	1253	PROTOTYPE:
1109	CODE:	1254	CODE:
1110	RETVAL = coro_nready;	1255	RETVAL = coro_nready;
1111	OUTPUT:	1256	OUTPUT:
1112	RETVAL	1257	RETVAL
1113		1258
		1259	MODULE = Coro::State PACKAGE = Coro::AIO
		1260
		1261	SV *
		1262	_get_state ()
		1263	CODE:
		1264	{
		1265	struct {
		1266	int errorno;
		1267	int laststype;
		1268	int laststatval;
		1269	Stat_t statcache;
		1270	} data;
		1271
		1272	data.errorno = errno;
		1273	data.laststype = PL_laststype;
		1274	data.laststatval = PL_laststatval;
		1275	data.statcache = PL_statcache;
		1276
		1277	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1278	}
		1279	OUTPUT:
		1280	RETVAL
		1281
1114	void	1282	void
1115	schedule(...)	1283	_set_state (char *data_)
1116	PROTOTYPE:	1284	PROTOTYPE: $
1117	CODE:	1285	CODE:
1118	api_schedule ();	1286	{
		1287	struct {
		1288	int errorno;
		1289	int laststype;
		1290	int laststatval;
		1291	Stat_t statcache;
		1292	} *data = (void *)data_;
1119		1293
1120	void	1294	errno = data->errorno;
1121	cede(...)	1295	PL_laststype = data->laststype;
1122	PROTOTYPE:	1296	PL_laststatval = data->laststatval;
1123	CODE:	1297	PL_statcache = data->statcache;
1124	api_cede ();	1298	}
1125

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