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Comparing Coro/Coro/State.xs (file contents):
Revision 1.46 by pcg, Wed Nov 5 20:02:46 2003 UTC vs.
Revision 1.112 by root, Thu Nov 30 20:52:52 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	int inuse;
		125
		126	#if USE_VALGRIND
		127	int valgrind_id;
		128	#endif
		129	} coro_cctx;
		130
		131	enum {
		132	CF_RUNNING, /* coroutine is running */
		133	CF_READY, /* coroutine is ready */
		134	};
		135
		136	/* this is a structure representing a perl-level coroutine */
74	struct coro {	137	struct coro {
75	/* the top-level JMPENV for each coroutine, needed to catch dies. */	138	/* the c coroutine allocated to this perl coroutine, if any */
76	JMPENV start_env;	139	coro_cctx *cctx;
77		140
78	/* the optional C context */	141	/* data associated with this coroutine (initial args) */
79	coro_stack *stack;	142	AV *args;
80	void *cursp;
81	int gencnt;	143	int refcnt;
		144	int flags;
82		145
83	/* optionally saved, might be zero */	146	/* optionally saved, might be zero */
84	AV *defav;	147	AV *defav;
85	SV *defsv;	148	SV *defsv;
86	SV *errsv;	149	SV *errsv;
87		150
88	/* saved global state not related to stacks */	151	#define VAR(name,type) type name;
89	U8 dowarn;	152	# include "state.h"
90	I32 in_eval;	153	#undef VAR
91		154
92	/* the stacks and related info (callchain etc..) */	155	/* coro process data */
93	PERL_SI *curstackinfo;	156	int prio;
94	AV *curstack;
95	AV *mainstack;
96	SV **stack_sp;
97	OP *op;
98	SV **curpad;
99	AV *comppad;
100	SV **stack_base;
101	SV **stack_max;
102	SV **tmps_stack;
103	I32 tmps_floor;
104	I32 tmps_ix;
105	I32 tmps_max;
106	I32 *markstack;
107	I32 *markstack_ptr;
108	I32 *markstack_max;
109	I32 *scopestack;
110	I32 scopestack_ix;
111	I32 scopestack_max;
112	ANY *savestack;
113	I32 savestack_ix;
114	I32 savestack_max;
115	OP **retstack;
116	I32 retstack_ix;
117	I32 retstack_max;
118	COP *curcop;
119	JMPENV *top_env;
120
121	/* data associated with this coroutine (initial args) */
122	AV *args;
123	};	157	};
124		158
125	typedef struct coro *Coro__State;	159	typedef struct coro *Coro__State;
126	typedef struct coro *Coro__State_or_hashref;	160	typedef struct coro *Coro__State_or_hashref;
127		161
128	static AV *main_mainstack; /* used to differentiate between $main and others */	162	static AV *
129	static HV *coro_state_stash;	163	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	{	164	{
139	AV *av;	165	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;	166	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		167
158	newpadlist = newAV ();	168	newpadlist = newAV ();
159	AvREAL_off (newpadlist);	169	AvREAL_off (newpadlist);
160	av_store (newpadlist, 0, (SV *) newpad_name);	170	#if PERL_VERSION_ATLEAST (5,9,0)
		171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		172	#else
		173	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		174	#endif
		175	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		176	--AvFILLp (padlist);
		177
		178	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
161	av_store (newpadlist, 1, (SV *) newpad);	179	av_store (newpadlist, 1, (SV *)newpad);
162		180
163	av = newAV (); /* will be @_ */	181	return newpadlist;
164	av_extend (av, 0);	182	}
165	av_store (newpad, 0, (SV *) av);
166	AvFLAGS (av) = AVf_REIFY;
167		183
168	for (ix = fpad; ix > 0; ix--)	184	static void
		185	free_padlist (AV *padlist)
		186	{
		187	/* may be during global destruction */
		188	if (SvREFCNT (padlist))
169	{	189	{
170	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	190	I32 i = AvFILLp (padlist);
171	if (namesv && namesv != &PL_sv_undef)	191	while (i >= 0)
172	{	192	{
173	char *name = SvPVX (namesv); /* XXX */	193	SV **svp = av_fetch (padlist, i--, FALSE);
174	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	194	if (svp)
175	{ /* lexical from outside? */
176	npad[ix] = SvREFCNT_inc (ppad[ix]);
177	}	195	{
178	else
179	{ /* our own lexical */
180	SV *sv;	196	SV *sv;
181	if (*name == '&')	197	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
182	sv = SvREFCNT_inc (ppad[ix]);	198	SvREFCNT_dec (sv);
183	else if (*name == '@')	199
184	sv = (SV *) newAV ();	200	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	}	201	}
193	}	202	}
194	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	203
195	{	204	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	}	205	}
		206	}
205		207
206	#if 0 /* return -ENOTUNDERSTOOD */	208	static int
207	/* Now that vars are all in place, clone nested closures. */	209	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		210	{
		211	AV *padlist;
		212	AV *av = (AV *)mg->mg_obj;
208		213
209	for (ix = fpad; ix > 0; ix--) {	214	/* casting is fun. */
210	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
211	if (namesv	216	free_padlist (padlist);
212	&& namesv != &PL_sv_undef	217
213	&& !(SvFLAGS(namesv) & SVf_FAKE)	218	SvREFCNT_dec (av);
214	&& *SvPVX(namesv) == '&'	219
215	&& CvCLONE(ppad[ix]))	220	return 0;
216	{	221	}
217	CV *kid = cv_clone((CV*)ppad[ix]);	222
218	SvREFCNT_dec(ppad[ix]);	223	#define PERL_MAGIC_coro PERL_MAGIC_ext
219	CvCLONE_on(kid);	224
220	SvPADMY_on(kid);	225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221	npad[ix] = (SV*)kid;	226
222	}	227	#define CORO_MAGIC(cv) \
		228	SvMAGIC (cv) \
		229	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		230	? SvMAGIC (cv) \
		231	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		232	: 0
		233
		234	/* the next two functions merely cache the padlists */
		235	static void
		236	get_padlist (CV *cv)
		237	{
		238	MAGIC *mg = CORO_MAGIC (cv);
		239	AV *av;
		240
		241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
		242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		243	else
		244	{
		245	#if 0
		246	/* this is probably cleaner, but also slower? */
		247	CV *cp = Perl_cv_clone (cv);
		248	CvPADLIST (cv) = CvPADLIST (cp);
		249	CvPADLIST (cp) = 0;
		250	SvREFCNT_dec (cp);
		251	#else
		252	CvPADLIST (cv) = coro_clone_padlist (cv);
		253	#endif
		254	}
		255	}
		256
		257	static void
		258	put_padlist (CV *cv)
		259	{
		260	MAGIC *mg = CORO_MAGIC (cv);
		261	AV *av;
		262
		263	if (!mg)
		264	{
		265	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		266	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		267	mg->mg_virtual = &vtbl_coro;
		268	mg->mg_obj = (SV *)newAV ();
223	}	269	}
224	#endif
225		270
226	return newpadlist;	271	av = (AV *)mg->mg_obj;
227	}
228		272
229	#ifdef MAY_FLUSH	273	if (AvFILLp (av) >= AvMAX (av))
230	STATIC void	274	av_extend (av, AvMAX (av) + 1);
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		275
245	SvREFCNT_dec((SV*)padlist);	276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
246	}
247	}	277	}
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));
274	}
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		278
302	#define SB do {	279	#define SB do {
303	#define SE } while (0)	280	#define SE } while (0)
304		281
305	#define LOAD(state) load_state(aTHX_ (state));	282	#define LOAD(state) load_state((state));
306	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	283	#define SAVE(state,flags) save_state((state),(flags));
307		284
308	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	285	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
309		286
310	static void	287	static void
311	load_state(pTHX_ Coro__State c)	288	load_state(Coro__State c)
312	{	289	{
313	PL_dowarn = c->dowarn;	290	#define VAR(name,type) PL_ ## name = c->name;
314	PL_in_eval = c->in_eval;	291	# include "state.h"
315		292	#undef VAR
316	PL_curstackinfo = c->curstackinfo;
317	PL_curstack = c->curstack;
318	PL_mainstack = c->mainstack;
319	PL_stack_sp = c->stack_sp;
320	PL_op = c->op;
321	PL_curpad = c->curpad;
322	PL_comppad = c->comppad;
323	PL_stack_base = c->stack_base;
324	PL_stack_max = c->stack_max;
325	PL_tmps_stack = c->tmps_stack;
326	PL_tmps_floor = c->tmps_floor;
327	PL_tmps_ix = c->tmps_ix;
328	PL_tmps_max = c->tmps_max;
329	PL_markstack = c->markstack;
330	PL_markstack_ptr = c->markstack_ptr;
331	PL_markstack_max = c->markstack_max;
332	PL_scopestack = c->scopestack;
333	PL_scopestack_ix = c->scopestack_ix;
334	PL_scopestack_max = c->scopestack_max;
335	PL_savestack = c->savestack;
336	PL_savestack_ix = c->savestack_ix;
337	PL_savestack_max = c->savestack_max;
338	PL_retstack = c->retstack;
339	PL_retstack_ix = c->retstack_ix;
340	PL_retstack_max = c->retstack_max;
341	PL_curcop = c->curcop;
342	PL_top_env = c->top_env;
343		293
344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
346	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
347		297
…		…
350	CV *cv;	300	CV *cv;
351		301
352	/* now do the ugly restore mess */	302	/* now do the ugly restore mess */
353	while ((cv = (CV *)POPs))	303	while ((cv = (CV *)POPs))
354	{	304	{
355	AV *padlist = (AV *)POPs;
356
357	if (padlist)
358	{
359	put_padlist (cv); /* mark this padlist as available */	305	put_padlist (cv); /* mark this padlist as available */
360	CvPADLIST(cv) = padlist;	306	CvDEPTH (cv) = PTR2IV (POPs);
361	#ifdef USE_THREADS	307	CvPADLIST (cv) = (AV *)POPs;
362	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
363	#endif
364	}
365
366	++CvDEPTH(cv);
367	}	308	}
368		309
369	PUTBACK;	310	PUTBACK;
370	}	311	}
371	}	312	}
372		313
373	static void	314	static void
374	save_state(pTHX_ Coro__State c, int flags)	315	save_state(Coro__State c, int flags)
375	{	316	{
376	{	317	{
377	dSP;	318	dSP;
378	I32 cxix = cxstack_ix;	319	I32 cxix = cxstack_ix;
379	PERL_CONTEXT *ccstk = cxstack;	320	PERL_CONTEXT *ccstk = cxstack;
…		…
393	PERL_CONTEXT *cx = &ccstk[cxix--];	334	PERL_CONTEXT *cx = &ccstk[cxix--];
394		335
395	if (CxTYPE(cx) == CXt_SUB)	336	if (CxTYPE(cx) == CXt_SUB)
396	{	337	{
397	CV *cv = cx->blk_sub.cv;	338	CV *cv = cx->blk_sub.cv;
		339
398	if (CvDEPTH(cv))	340	if (CvDEPTH (cv))
399	{	341	{
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);	342	EXTEND (SP, 3);
406
407	while (--CvDEPTH(cv))
408	{
409	/* this tells the restore code to increment CvDEPTH */
410	PUSHs (Nullsv);
411	PUSHs ((SV *)cv);
412	}
413		343
414	PUSHs ((SV *)CvPADLIST(cv));	344	PUSHs ((SV *)CvPADLIST(cv));
		345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
415	PUSHs ((SV *)cv);	346	PUSHs ((SV *)cv);
416		347
		348	CvDEPTH (cv) = 0;
417	get_padlist (cv); /* this is a monster */	349	get_padlist (cv);
418	}	350	}
419	}	351	}
420	#ifdef CXt_FORMAT	352	#ifdef CXt_FORMAT
421	else if (CxTYPE(cx) == CXt_FORMAT)	353	else if (CxTYPE(cx) == CXt_FORMAT)
422	{	354	{
…		…
440		372
441	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	373	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
442	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
443	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
444		376
445	c->dowarn = PL_dowarn;	377	#define VAR(name,type)c->name = PL_ ## name;
446	c->in_eval = PL_in_eval;	378	# include "state.h"
447		379	#undef VAR
448	c->curstackinfo = PL_curstackinfo;
449	c->curstack = PL_curstack;
450	c->mainstack = PL_mainstack;
451	c->stack_sp = PL_stack_sp;
452	c->op = PL_op;
453	c->curpad = PL_curpad;
454	c->comppad = PL_comppad;
455	c->stack_base = PL_stack_base;
456	c->stack_max = PL_stack_max;
457	c->tmps_stack = PL_tmps_stack;
458	c->tmps_floor = PL_tmps_floor;
459	c->tmps_ix = PL_tmps_ix;
460	c->tmps_max = PL_tmps_max;
461	c->markstack = PL_markstack;
462	c->markstack_ptr = PL_markstack_ptr;
463	c->markstack_max = PL_markstack_max;
464	c->scopestack = PL_scopestack;
465	c->scopestack_ix = PL_scopestack_ix;
466	c->scopestack_max = PL_scopestack_max;
467	c->savestack = PL_savestack;
468	c->savestack_ix = PL_savestack_ix;
469	c->savestack_max = PL_savestack_max;
470	c->retstack = PL_retstack;
471	c->retstack_ix = PL_retstack_ix;
472	c->retstack_max = PL_retstack_max;
473	c->curcop = PL_curcop;
474	c->top_env = PL_top_env;
475	}	380	}
476		381
477	/*	382	/*
478	* allocate various perl stacks. This is an exact copy	383	* allocate various perl stacks. This is an exact copy
479	* of perl.c:init_stacks, except that it uses less memory	384	* of perl.c:init_stacks, except that it uses less memory
480	* on the assumption that coroutines do not usually need	385	* on the (sometimes correct) assumption that coroutines do
481	* a lot of stackspace.	386	* not usually need a lot of stackspace.
482	*/	387	*/
483	STATIC void	388	static void
484	coro_init_stacks (pTHX)	389	coro_init_stacks ()
485	{	390	{
486	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
487	PL_curstackinfo->si_type = PERLSI_MAIN;	392	PL_curstackinfo->si_type = PERLSI_MAIN;
488	PL_curstack = PL_curstackinfo->si_stack;	393	PL_curstack = PL_curstackinfo->si_stack;
489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
511		416
512	New(54,PL_savestack,96,ANY);	417	New(54,PL_savestack,96,ANY);
513	PL_savestack_ix = 0;	418	PL_savestack_ix = 0;
514	PL_savestack_max = 96;	419	PL_savestack_max = 96;
515		420
		421	#if !PERL_VERSION_ATLEAST (5,9,0)
516	New(54,PL_retstack,8,OP*);	422	New(54,PL_retstack,8,OP*);
517	PL_retstack_ix = 0;	423	PL_retstack_ix = 0;
518	PL_retstack_max = 8;	424	PL_retstack_max = 8;
		425	#endif
519	}	426	}
520		427
521	/*	428	/*
522	* destroy the stacks, the callchain etc...	429	* destroy the stacks, the callchain etc...
523	* still there is a memleak of 128 bytes...
524	*/	430	*/
525	STATIC void	431	static void
526	destroy_stacks(pTHX)	432	coro_destroy_stacks ()
527	{	433	{
528	if (!IN_DESTRUCT)	434	if (!IN_DESTRUCT)
529	{	435	{
530	/* is this ugly, I ask? */	436	/* is this ugly, I ask? */
531	while (PL_scopestack_ix)	437	LEAVE_SCOPE (0);
532	LEAVE;
533		438
534	/* sure it is, but more important: is it correct?? :/ */	439	/* sure it is, but more important: is it correct?? :/ */
535	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
536	FREETMPS;	440	FREETMPS;
		441
		442	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
537	}	443	}
538		444
539	while (PL_curstackinfo->si_next)	445	while (PL_curstackinfo->si_next)
540	PL_curstackinfo = PL_curstackinfo->si_next;	446	PL_curstackinfo = PL_curstackinfo->si_next;
541		447
542	while (PL_curstackinfo)	448	while (PL_curstackinfo)
543	{	449	{
544	PERL_SI *p = PL_curstackinfo->si_prev;	450	PERL_SI *p = PL_curstackinfo->si_prev;
545		451
546	{	452	{ /*D*//*remove*/
547	dSP;	453	dSP;
548	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	454	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
549	PUTBACK; /* possibly superfluous */	455	PUTBACK; /* possibly superfluous */
550	}	456	}
551		457
552	if (!IN_DESTRUCT)	458	if (!IN_DESTRUCT)
553	{	459	{
554	dounwind(-1);	460	dounwind (-1);/*D*//*remove*/
555	SvREFCNT_dec(PL_curstackinfo->si_stack);	461	SvREFCNT_dec (PL_curstackinfo->si_stack);
556	}	462	}
557		463
558	Safefree(PL_curstackinfo->si_cxstack);	464	Safefree (PL_curstackinfo->si_cxstack);
559	Safefree(PL_curstackinfo);	465	Safefree (PL_curstackinfo);
560	PL_curstackinfo = p;	466	PL_curstackinfo = p;
561	}	467	}
562		468
563	Safefree(PL_tmps_stack);	469	Safefree (PL_tmps_stack);
564	Safefree(PL_markstack);	470	Safefree (PL_markstack);
565	Safefree(PL_scopestack);	471	Safefree (PL_scopestack);
566	Safefree(PL_savestack);	472	Safefree (PL_savestack);
		473	#if !PERL_VERSION_ATLEAST (5,9,0)
567	Safefree(PL_retstack);	474	Safefree (PL_retstack);
568	}
569
570	static void
571	allocate_stack (Coro__State ctx, int alloc)
572	{
573	coro_stack *stack;
574
575	New (0, stack, 1, coro_stack);
576
577	stack->refcnt = 1;
578	stack->usecnt = 1;
579	stack->gencnt = ctx->gencnt = 0;
580	if (alloc)
581	{
582	#if HAVE_MMAP
583	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
584	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
585	if (stack->sptr == (void *)-1)
586	#endif	475	#endif
587	{
588	/*FIXME*//*D*//* reasonable stack size! */
589	stack->ssize = -4096 * sizeof (long);
590	New (0, stack->sptr, 4096, long);
591	}
592	}
593	else
594	stack->sptr = 0;
595
596	ctx->stack = stack;
597	}	476	}
598		477
599	static void	478	static void
600	deallocate_stack (Coro__State ctx)	479	setup_coro (struct coro *coro)
601	{
602	coro_stack *stack = ctx->stack;
603
604	ctx->stack = 0;
605
606	if (stack)
607	{
608	if (!--stack->refcnt)
609	{
610	#ifdef HAVE_MMAP
611	if (stack->ssize > 0 && stack->sptr)
612	munmap (stack->sptr, stack->ssize);
613	else
614	#else
615	Safefree (stack->sptr);
616	#endif
617	Safefree (stack);
618	}
619	else if (ctx->gencnt == stack->gencnt)
620	--stack->usecnt;
621	}
622	}
623
624	static void
625	setup_coro (void *arg)
626	{	480	{
627	/*	481	/*
628	* emulate part of the perl startup here.	482	* emulate part of the perl startup here.
629	*/	483	*/
630	dSP;
631	Coro__State ctx = (Coro__State)arg;
632	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
633		484
634	coro_init_stacks (aTHX);	485	coro_init_stacks ();
		486
635	/*PL_curcop = 0;*/	487	PL_curcop = 0;
636	/*PL_in_eval = PL_in_eval;*/ /* inherit */	488	PL_in_eval = 0;
		489	PL_curpm = 0;
		490
		491	{
		492	dSP;
		493	LOGOP myop;
		494
		495	/* I have no idea why this is needed, but it is */
		496	PUSHMARK (SP);
		497
637	SvREFCNT_dec (GvAV (PL_defgv));	498	SvREFCNT_dec (GvAV (PL_defgv));
638	GvAV (PL_defgv) = ctx->args;	499	GvAV (PL_defgv) = coro->args; coro->args = 0;
639		500
640	SPAGAIN;
641
642	if (ctx->stack)
643	{
644	ctx->cursp = 0;
645
646	PUSHMARK(SP);
647	PUTBACK;
648	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
649
650	if (SvTRUE (ERRSV))
651	croak (NULL);
652	else
653	croak ("FATAL: CCTXT coroutine returned!");
654	}
655	else
656	{
657	UNOP myop;
658
659	PL_op = (OP *)&myop;
660
661	Zero(&myop, 1, UNOP);	501	Zero (&myop, 1, LOGOP);
662	myop.op_next = Nullop;	502	myop.op_next = Nullop;
663	myop.op_flags = OPf_WANT_VOID;	503	myop.op_flags = OPf_WANT_VOID;
664		504
		505	PL_op = (OP *)&myop;
		506
665	PUSHMARK(SP);	507	PUSHMARK (SP);
666	XPUSHs (sub_init);	508	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
667	/*
668	* the next line is slightly wrong, as PL_op->op_next
669	* is actually being executed so we skip the first op.
670	* that doesn't matter, though, since it is only
671	* pp_nextstate and we never return...
672	* ah yes, and I don't care anyways ;)
673	*/
674	PUTBACK;	509	PUTBACK;
675	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	510	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
676	SPAGAIN;	511	SPAGAIN;
677		512
678	ENTER; /* necessary e.g. for dounwind */	513	ENTER; /* necessary e.g. for dounwind */
679	}	514	}
680	}	515	}
681		516
682	static void	517	static void
683	continue_coro (void *arg)	518	free_coro_mortal ()
684	{	519	{
685	/*
686	* this is a _very_ stripped down perl interpreter ;)
687	*/
688	Coro__State ctx = (Coro__State)arg;
689	JMPENV coro_start_env;
690
691	PL_top_env = &ctx->start_env;
692
693	ctx->cursp = 0;
694	PL_op = PL_op->op_next;
695	CALLRUNOPS(aTHX);
696
697	abort ();
698	}
699
700	STATIC void
701	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
702	{
703	dSTACKLEVEL;
704	static struct coro *xnext;
705
706	if (prev != next)
707	{
708	xnext = next;
709
710	if (next->mainstack)
711	{
712	SAVE (prev, flags);
713	LOAD (next);
714
715	/* mark this state as in-use */
716	next->mainstack = 0;
717	next->tmps_ix = -2;
718
719	/* stacklevel changed? if yes, grab the stack for us! */
720	if (flags & TRANSFER_SAVE_CCTXT)
721	{
722	if (!prev->stack)
723	allocate_stack (prev, 0);
724	else if (prev->cursp != stacklevel
725	&& prev->stack->usecnt > 1)
726	{
727	prev->gencnt = ++prev->stack->gencnt;
728	prev->stack->usecnt = 1;
729	}
730
731	/* has our stack been invalidated? */
732	if (next->stack && next->stack->gencnt != next->gencnt)
733	{
734	deallocate_stack (next);
735	allocate_stack (next, 1);
736	coro_create (&(next->stack->cctx),
737	continue_coro, (void *)next,
738	next->stack->sptr, labs (next->stack->ssize));
739	}
740
741	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
742	/* don't add any code here */
743	}
744
745	}
746	else if (next->tmps_ix == -2)
747	croak ("tried to transfer to running coroutine");
748	else
749	{
750	SAVE (prev, -1); /* first get rid of the old state */
751
752	if (flags & TRANSFER_SAVE_CCTXT)
753	{
754	if (!prev->stack)
755	allocate_stack (prev, 0);
756
757	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
758	{
759	PL_top_env = &next->start_env;
760
761	setup_coro (next);
762
763	prev->stack->refcnt++;
764	prev->stack->usecnt++;
765	next->stack = prev->stack;
766	next->gencnt = prev->gencnt;
767	}
768	else
769	{
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)	520	if (coro_mortal)
791	{	521	{
792	SvREFCNT_dec (coro_mortal);	522	SvREFCNT_dec (coro_mortal);
793	coro_mortal = 0;	523	coro_mortal = 0;
794	}	524	}
795	}	525	}
796		526
797	#define SV_CORO(sv,func) \	527	static void NOINLINE
798	do { \	528	prepare_cctx (coro_cctx *cctx)
799	if (SvROK (sv)) \	529	{
800	sv = SvRV (sv); \	530	dSP;
801	\	531	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		532
818	#define SvSTATE(sv) (struct coro *)SvIV (sv)	533	Zero (&myop, 1, LOGOP);
		534	myop.op_next = PL_op;
		535	myop.op_flags = OPf_WANT_VOID;
819		536
		537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		538
		539	PUSHMARK (SP);
		540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		541	PUTBACK;
		542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		543	SPAGAIN;
		544	}
		545
		546	static void
		547	coro_run (void *arg)
		548	{
		549	/* coro_run is the alternative epilogue of transfer() */
		550	UNLOCK;
		551
		552	/*
		553	* this is a _very_ stripped down perl interpreter ;)
		554	*/
		555	PL_top_env = &PL_start_env;
		556
		557	/* inject call to cctx_init */
		558	prepare_cctx ((coro_cctx *)arg);
		559
		560	/* somebody will hit me for both perl_run and PL_restartop */
		561	perl_run (PL_curinterp);
		562
		563	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		564	abort ();
		565	}
		566
		567	static coro_cctx *
		568	cctx_new ()
		569	{
		570	coro_cctx *cctx;
		571
		572	++cctx_count;
		573
		574	New (0, cctx, 1, coro_cctx);
		575
		576	#if HAVE_MMAP
		577
		578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		579	/* mmap suppsedly does allocate-on-write for us */
		580	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		581
		582	if (cctx->sptr == (void *)-1)
		583	{
		584	perror ("FATAL: unable to mmap stack for coroutine");
		585	_exit (EXIT_FAILURE);
		586	}
		587
		588	# if STACKGUARD
		589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		590	# endif
		591
		592	#else
		593
		594	cctx->ssize = STACKSIZE * (long)sizeof (long);
		595	New (0, cctx->sptr, STACKSIZE, long);
		596
		597	if (!cctx->sptr)
		598	{
		599	perror ("FATAL: unable to malloc stack for coroutine");
		600	_exit (EXIT_FAILURE);
		601	}
		602
		603	#endif
		604
		605	#if USE_VALGRIND
		606	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		607	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		608	cctx->ssize + (char *)cctx->sptr
		609	);
		610	#endif
		611
		612	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		613
		614	return cctx;
		615	}
		616
		617	static void
		618	cctx_free (coro_cctx *cctx)
		619	{
		620	if (!cctx)
		621	return;
		622
		623	--cctx_count;
		624
		625	#if USE_VALGRIND
		626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		627	#endif
		628
		629	#if HAVE_MMAP
		630	munmap (cctx->sptr, cctx->ssize);
		631	#else
		632	Safefree (cctx->sptr);
		633	#endif
		634
		635	Safefree (cctx);
		636	}
		637
		638	static coro_cctx *
		639	cctx_get ()
		640	{
		641	coro_cctx *cctx;
		642
		643	if (cctx_first)
		644	{
		645	--cctx_idle;
		646	cctx = cctx_first;
		647	cctx_first = cctx->next;
		648	}
		649	else
		650	{
		651	cctx = cctx_new ();
		652	PL_op = PL_op->op_next;
		653	}
		654
		655	return cctx;
		656	}
		657
		658	static void
		659	cctx_put (coro_cctx *cctx)
		660	{
		661	++cctx_idle;
		662	cctx->next = cctx_first;
		663	cctx_first = cctx;
		664	}
		665
		666	/* never call directly, always through the coro_state_transfer global variable */
		667	static void NOINLINE
		668	transfer (struct coro *prev, struct coro *next, int flags)
		669	{
		670	dSTACKLEVEL;
		671
		672	/* sometimes transfer is only called to set idle_sp */
		673	if (flags == TRANSFER_SET_STACKLEVEL)
		674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		675	else if (prev != next)
		676	{
		677	coro_cctx *prev__cctx;
		678
		679	if (!prev->cctx)
		680	{
		681	/* create a new empty context */
		682	Newz (0, prev->cctx, 1, coro_cctx);
		683	prev->cctx->inuse = 1;
		684	prev->flags |= CF_RUNNING;
		685	}
		686
		687	if (!prev->flags & CF_RUNNING)
		688	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		689
		690	if (next->flags & CF_RUNNING)
		691	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		692
		693	prev->flags &= ~CF_RUNNING;
		694	next->flags |= CF_RUNNING;
		695
		696	LOCK;
		697
		698	if (next->mainstack)
		699	{
		700	/* coroutine already started */
		701	SAVE (prev, flags);
		702	LOAD (next);
		703	}
		704	else
		705	{
		706	/* need to start coroutine */
		707	/* first get rid of the old state */
		708	SAVE (prev, -1);
		709	/* setup coroutine call */
		710	setup_coro (next);
		711	/* need a new stack */
		712	assert (!next->stack);
		713	}
		714
		715	prev__cctx = prev->cctx;
		716
		717	/* possibly "free" the cctx */
		718	if (prev__cctx->idle_sp == STACKLEVEL)
		719	{
		720	assert (PL_top_env == prev__cctx->top_env);
		721
		722	cctx_put (prev__cctx);
		723	prev->cctx = 0;
		724	}
		725
		726	if (!next->cctx)
		727	next->cctx = cctx_get ();
		728
		729	if (prev__cctx != next->cctx)
		730	{
		731	assert ( prev__cctx->inuse);
		732	assert (!next->cctx->inuse);
		733
		734	prev__cctx->inuse = 0;
		735	next->cctx->inuse = 1;
		736
		737	prev__cctx->top_env = PL_top_env;
		738	PL_top_env = next->cctx->top_env;
		739	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		740	}
		741
		742	free_coro_mortal ();
		743
		744	UNLOCK;
		745	}
		746	}
		747
		748	struct transfer_args
		749	{
		750	struct coro *prev, *next;
		751	int flags;
		752	};
		753
		754	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		755
		756	static void
		757	coro_state_destroy (struct coro *coro)
		758	{
		759	if (coro->refcnt--)
		760	return;
		761
		762	if (coro->flags & CF_RUNNING)
		763	croak ("FATAL: tried to destroy currently running coroutine");
		764
		765	if (coro->mainstack && coro->mainstack != main_mainstack)
		766	{
		767	struct coro temp;
		768
		769	SAVE ((&temp), TRANSFER_SAVE_ALL);
		770	LOAD (coro);
		771
		772	coro_destroy_stacks ();
		773
		774	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		775
		776	coro->mainstack = 0;
		777	}
		778
		779	cctx_free (coro->cctx);
		780	SvREFCNT_dec (coro->args);
		781	Safefree (coro);
		782	}
		783
820	static void	784	static int
		785	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		786	{
		787	struct coro *coro = (struct coro *)mg->mg_ptr;
		788	mg->mg_ptr = 0;
		789
		790	coro_state_destroy (coro);
		791
		792	return 0;
		793	}
		794
		795	static int
		796	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		797	{
		798	struct coro *coro = (struct coro *)mg->mg_ptr;
		799
		800	++coro->refcnt;
		801
		802	return 0;
		803	}
		804
		805	static MGVTBL coro_state_vtbl = {
		806	0, 0, 0, 0,
		807	coro_state_clear,
		808	0,
		809	#ifdef MGf_DUP
		810	coro_state_dup,
		811	#else
		812	# define MGf_DUP 0
		813	#endif
		814	};
		815
		816	static struct coro *
		817	SvSTATE (SV *coro)
		818	{
		819	HV *stash;
		820	MAGIC *mg;
		821
		822	if (SvROK (coro))
		823	coro = SvRV (coro);
		824
		825	stash = SvSTASH (coro);
		826	if (stash != coro_stash && stash != coro_state_stash)
		827	{
		828	/* very slow, but rare, check */
		829	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		830	croak ("Coro::State object required");
		831	}
		832
		833	mg = SvMAGIC (coro);
		834	assert (mg->mg_type == PERL_MAGIC_ext);
		835	return (struct coro *)mg->mg_ptr;
		836	}
		837
		838	static void
		839	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		840	{
		841	ta->prev = SvSTATE (prev);
		842	ta->next = SvSTATE (next);
		843	ta->flags = flags;
		844	}
		845
		846	static void
821	api_transfer(pTHX_ SV *prev, SV *next, int flags)	847	api_transfer (SV *prev, SV *next, int flags)
822	{	848	{
823	SV_CORO (prev, "Coro::transfer");	849	dTHX;
824	SV_CORO (next, "Coro::transfer");	850	struct transfer_args ta;
825		851
826	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	852	prepare_transfer (&ta, prev, next, flags);
		853	TRANSFER (ta);
827	}	854	}
828		855
829	/** Coro ********************************************************************/	856	/** Coro ********************************************************************/
830		857
831	#define PRIO_MAX 3	858	#define PRIO_MAX 3
…		…
835	#define PRIO_IDLE -3	862	#define PRIO_IDLE -3
836	#define PRIO_MIN -4	863	#define PRIO_MIN -4
837		864
838	/* for Coro.pm */	865	/* for Coro.pm */
839	static GV *coro_current, *coro_idle;	866	static GV *coro_current, *coro_idle;
840	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	867	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
841	static int coro_nready;	868	static int coro_nready;
842		869
843	static void	870	static void
844	coro_enq (SV *sv)	871	coro_enq (SV *coro_sv)
845	{	872	{
846	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);	873	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
856	coro_nready++;	874	coro_nready++;
857
858	return;
859	}
860
861	croak ("Coro::ready tried to enqueue something that is not a coroutine");
862	}	875	}
863		876
864	static SV *	877	static SV *
865	coro_deq (int min_prio)	878	coro_deq (int min_prio)
866	{	879	{
…		…
869	min_prio -= PRIO_MIN;	882	min_prio -= PRIO_MIN;
870	if (min_prio < 0)	883	if (min_prio < 0)
871	min_prio = 0;	884	min_prio = 0;
872		885
873	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	886	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
874	if (av_len (coro_ready[prio]) >= 0)	887	if (AvFILLp (coro_ready [prio]) >= 0)
875	{	888	{
876	coro_nready--;	889	coro_nready--;
877	return av_shift (coro_ready[prio]);	890	return av_shift (coro_ready [prio]);
878	}	891	}
879		892
880	return 0;	893	return 0;
881	}	894	}
882		895
883	static void	896	static int
884	api_ready (SV *coro)	897	api_ready (SV *coro_sv)
885	{	898	{
		899	struct coro *coro;
		900
886	if (SvROK (coro))	901	if (SvROK (coro_sv))
887	coro = SvRV (coro);	902	coro_sv = SvRV (coro_sv);
888		903
		904	coro = SvSTATE (coro_sv);
		905
		906	if (coro->flags & CF_READY)
		907	return 0;
		908
		909	if (coro->flags & CF_RUNNING)
		910	croak ("Coro::ready called on currently running coroutine");
		911
		912	coro->flags |= CF_READY;
		913
		914	LOCK;
889	coro_enq (SvREFCNT_inc (coro));	915	coro_enq (SvREFCNT_inc (coro_sv));
		916	UNLOCK;
		917
		918	return 1;
		919	}
		920
		921	static int
		922	api_is_ready (SV *coro_sv)
		923	{
		924	return !!SvSTATE (coro_sv)->flags & CF_READY;
		925	}
		926
		927	static void
		928	prepare_schedule (struct transfer_args *ta)
		929	{
		930	SV *current, *prev, *next;
		931
		932	current = GvSV (coro_current);
		933
		934	for (;;)
		935	{
		936	LOCK;
		937	next = coro_deq (PRIO_MIN);
		938	UNLOCK;
		939
		940	if (next)
		941	break;
		942
		943	{
		944	dSP;
		945
		946	ENTER;
		947	SAVETMPS;
		948
		949	PUSHMARK (SP);
		950	PUTBACK;
		951	call_sv (GvSV (coro_idle), G_DISCARD);
		952
		953	FREETMPS;
		954	LEAVE;
		955	}
		956	}
		957
		958	prev = SvRV (current);
		959	SvRV (current) = next;
		960
		961	/* free this only after the transfer */
		962	LOCK;
		963	free_coro_mortal ();
		964	UNLOCK;
		965	coro_mortal = prev;
		966
		967	ta->prev = SvSTATE (prev);
		968	ta->next = SvSTATE (next);
		969	ta->flags = TRANSFER_SAVE_ALL;
		970
		971	ta->next->flags &= ~CF_READY;
		972	}
		973
		974	static void
		975	prepare_cede (struct transfer_args *ta)
		976	{
		977	api_ready (GvSV (coro_current));
		978
		979	prepare_schedule (ta);
890	}	980	}
891		981
892	static void	982	static void
893	api_schedule (void)	983	api_schedule (void)
894	{	984	{
895	SV *prev, *next;	985	dTHX;
		986	struct transfer_args ta;
896		987
897	prev = SvRV (GvSV (coro_current));	988	prepare_schedule (&ta);
898	next = coro_deq (PRIO_MIN);	989	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	}	990	}
914		991
915	static void	992	static void
916	api_cede (void)	993	api_cede (void)
917	{	994	{
918	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	995	dTHX;
		996	struct transfer_args ta;
919		997
920	api_schedule ();	998	prepare_cede (&ta);
		999	TRANSFER (ta);
921	}	1000	}
922		1001
923	MODULE = Coro::State PACKAGE = Coro::State	1002	MODULE = Coro::State PACKAGE = Coro::State
924		1003
925	PROTOTYPES: ENABLE	1004	PROTOTYPES: DISABLE
926		1005
927	BOOT:	1006	BOOT:
928	{ /* {} necessary for stoopid perl-5.6.x */	1007	{
929	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1008	#ifdef USE_ITHREADS
930	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1009	MUTEX_INIT (&coro_mutex);
		1010	#endif
		1011	BOOT_PAGESIZE;
		1012
931	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1013	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
932		1014
933	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1015	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
934	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1016	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
935	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1017	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		1018
941	main_mainstack = PL_mainstack;	1019	main_mainstack = PL_mainstack;
942		1020
943	coroapi.ver = CORO_API_VERSION;	1021	coroapi.ver = CORO_API_VERSION;
944	coroapi.transfer = api_transfer;	1022	coroapi.transfer = api_transfer;
945	}
946		1023
947	Coro::State	1024	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
948	_newprocess(args)	1025	}
949	SV * args	1026
950	PROTOTYPE: $	1027	SV *
		1028	new (char *klass, ...)
951	CODE:	1029	CODE:
952	Coro__State coro;	1030	{
		1031	struct coro *coro;
		1032	HV *hv;
		1033	int i;
953		1034
954	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
955	croak ("Coro::State::_newprocess expects an arrayref");
956
957	New (0, coro, 1, struct coro);	1035	Newz (0, coro, 1, struct coro);
		1036	coro->args = newAV ();
958		1037
959	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1038	hv = newHV ();
960	coro->mainstack = 0; /* actual work is done inside transfer */	1039	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
961	coro->stack = 0;	1040	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
962		1041
963	/* same as JMPENV_BOOTSTRAP */	1042	for (i = 1; i < items; i++)
964	/* we might be able to recycle start_env, but safe is safe */	1043	av_push (coro->args, newSVsv (ST (i)));
965	Zero(&coro->start_env, 1, JMPENV);	1044	}
966	coro->start_env.je_ret = -1;
967	coro->start_env.je_mustcatch = TRUE;
968
969	RETVAL = coro;
970	OUTPUT:	1045	OUTPUT:
971	RETVAL	1046	RETVAL
972		1047
973	void	1048	void
974	transfer(prev, next, flags)	1049	_set_stacklevel (...)
975	SV *prev	1050	ALIAS:
976	SV *next	1051	Coro::State::transfer = 1
977	int flags	1052	Coro::schedule = 2
978	PROTOTYPE: @	1053	Coro::cede = 3
		1054	Coro::Cont::yield = 4
979	CODE:	1055	CODE:
980	PUTBACK;	1056	{
981	SV_CORO (next, "Coro::transfer");	1057	struct transfer_args ta;
982	SV_CORO (prev, "Coro::transfer");	1058
983	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1059	switch (ix)
984	SPAGAIN;	1060	{
		1061	case 0:
		1062	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1063	ta.next = 0;
		1064	ta.flags = TRANSFER_SET_STACKLEVEL;
		1065	break;
		1066
		1067	case 1:
		1068	if (items != 3)
		1069	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1070
		1071	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1072	break;
		1073
		1074	case 2:
		1075	prepare_schedule (&ta);
		1076	break;
		1077
		1078	case 3:
		1079	prepare_cede (&ta);
		1080	break;
		1081
		1082	case 4:
		1083	{
		1084	SV *yieldstack;
		1085	SV *sv;
		1086	AV *defav = GvAV (PL_defgv);
		1087
		1088	yieldstack = *hv_fetch (
		1089	(HV *)SvRV (GvSV (coro_current)),
		1090	"yieldstack", sizeof ("yieldstack") - 1,
		1091	0
		1092	);
		1093
		1094	/* set up @_ -- ugly */
		1095	av_clear (defav);
		1096	av_fill (defav, items - 1);
		1097	while (items--)
		1098	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1099
		1100	sv = av_pop ((AV *)SvRV (yieldstack));
		1101	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1102	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1103	ta.flags = 0;
		1104	SvREFCNT_dec (sv);
		1105	}
		1106	break;
		1107
		1108	}
		1109
		1110	TRANSFER (ta);
		1111	}
985		1112
986	void	1113	void
987	DESTROY(coro)	1114	_clone_state_from (SV *dst, SV *src)
988	Coro::State coro	1115	CODE:
989	CODE:	1116	{
		1117	struct coro *coro_src = SvSTATE (src);
990		1118
991	if (coro->mainstack && coro->mainstack != main_mainstack)	1119	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
992	{
993	struct coro temp;
994		1120
995	PUTBACK;	1121	++coro_src->refcnt;
996	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1122	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
997	LOAD(aTHX_ coro);	1123	}
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
1010	Safefree (coro);
1011		1124
1012	void	1125	void
1013	flush()
1014	CODE:
1015	#ifdef MAY_FLUSH
1016	flush_padlist_cache ();
1017	#endif
1018
1019	void
1020	_exit(code)	1126	_exit (code)
1021	int code	1127	int code
1022	PROTOTYPE: $	1128	PROTOTYPE: $
1023	CODE:	1129	CODE:
1024	#if defined(__GLIBC__) || _POSIX_C_SOURCE
1025	_exit (code);	1130	_exit (code);
1026	#else
1027	signal (SIGTERM, SIG_DFL);
1028	raise (SIGTERM);
1029	exit (code);
1030	#endif
1031		1131
1032	MODULE = Coro::State PACKAGE = Coro::Cont	1132	int
		1133	cctx_count ()
		1134	CODE:
		1135	RETVAL = cctx_count;
		1136	OUTPUT:
		1137	RETVAL
1033		1138
1034	# this is slightly dirty (should expose a c-level api)	1139	int
1035		1140	cctx_idle ()
1036	void	1141	CODE:
1037	yield(...)	1142	RETVAL = cctx_idle;
1038	PROTOTYPE: @	1143	OUTPUT:
1039	CODE:	1144	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		1145
1062	MODULE = Coro::State PACKAGE = Coro	1146	MODULE = Coro::State PACKAGE = Coro
1063		1147
1064	# this is slightly dirty (should expose a c-level api)
1065
1066	BOOT:	1148	BOOT:
1067	{	1149	{
1068	int i;	1150	int i;
		1151
1069	HV *stash = gv_stashpv ("Coro", TRUE);	1152	coro_stash = gv_stashpv ("Coro", TRUE);
1070		1153
1071	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1154	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1155	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1156	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1157	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1158	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1159	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1077		1160
1078	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1161	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1079	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1162	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1080		1163
1081	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1164	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1085	SV *sv = perl_get_sv("Coro::API", 1);	1168	SV *sv = perl_get_sv("Coro::API", 1);
1086		1169
1087	coroapi.schedule = api_schedule;	1170	coroapi.schedule = api_schedule;
1088	coroapi.cede = api_cede;	1171	coroapi.cede = api_cede;
1089	coroapi.ready = api_ready;	1172	coroapi.ready = api_ready;
		1173	coroapi.is_ready = api_is_ready;
1090	coroapi.nready = &coro_nready;	1174	coroapi.nready = &coro_nready;
1091	coroapi.current = coro_current;	1175	coroapi.current = coro_current;
1092		1176
1093	GCoroAPI = &coroapi;	1177	GCoroAPI = &coroapi;
1094	sv_setiv(sv, (IV)&coroapi);	1178	sv_setiv (sv, (IV)&coroapi);
1095	SvREADONLY_on(sv);	1179	SvREADONLY_on (sv);
1096	}	1180	}
1097	}	1181	}
1098		1182
1099	void	1183	int
		1184	prio (Coro::State coro, int newprio = 0)
		1185	ALIAS:
		1186	nice = 1
		1187	CODE:
		1188	{
		1189	RETVAL = coro->prio;
		1190
		1191	if (items > 1)
		1192	{
		1193	if (ix)
		1194	newprio += coro->prio;
		1195
		1196	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1197	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1198
		1199	coro->prio = newprio;
		1200	}
		1201	}
		1202
		1203	SV *
1100	ready(self)	1204	ready (SV *self)
1101	SV * self
1102	PROTOTYPE: $	1205	PROTOTYPE: $
1103	CODE:	1206	CODE:
1104	api_ready (self);	1207	RETVAL = boolSV (api_ready (self));
		1208	OUTPUT:
		1209	RETVAL
		1210
		1211	SV *
		1212	is_ready (SV *self)
		1213	PROTOTYPE: $
		1214	CODE:
		1215	RETVAL = boolSV (api_is_ready (self));
		1216	OUTPUT:
		1217	RETVAL
1105		1218
1106	int	1219	int
1107	nready(...)	1220	nready (...)
1108	PROTOTYPE:	1221	PROTOTYPE:
1109	CODE:	1222	CODE:
1110	RETVAL = coro_nready;	1223	RETVAL = coro_nready;
1111	OUTPUT:	1224	OUTPUT:
1112	RETVAL	1225	RETVAL
1113		1226
		1227	MODULE = Coro::State PACKAGE = Coro::AIO
		1228
		1229	SV *
		1230	_get_state ()
		1231	CODE:
		1232	{
		1233	struct {
		1234	int errorno;
		1235	int laststype;
		1236	int laststatval;
		1237	Stat_t statcache;
		1238	} data;
		1239
		1240	data.errorno = errno;
		1241	data.laststype = PL_laststype;
		1242	data.laststatval = PL_laststatval;
		1243	data.statcache = PL_statcache;
		1244
		1245	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1246	}
		1247	OUTPUT:
		1248	RETVAL
		1249
1114	void	1250	void
1115	schedule(...)	1251	_set_state (char *data_)
1116	PROTOTYPE:	1252	PROTOTYPE: $
1117	CODE:	1253	CODE:
1118	api_schedule ();	1254	{
		1255	struct {
		1256	int errorno;
		1257	int laststype;
		1258	int laststatval;
		1259	Stat_t statcache;
		1260	} *data = (void *)data_;
1119		1261
1120	void	1262	errno = data->errorno;
1121	cede(...)	1263	PL_laststype = data->laststype;
1122	PROTOTYPE:	1264	PL_laststatval = data->laststatval;
1123	CODE:	1265	PL_statcache = data->statcache;
1124	api_cede ();	1266	}
1125

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