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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.88 by root, Fri Nov 24 15:34:33 2006 UTC vs.
Revision 1.124 by root, Tue Dec 5 12:50:04 2006 UTC

1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	#if PERL_VERSION < 6	9	#if USE_VALGRIND
		10	# include <valgrind/valgrind.h>
		11	#endif
		12
		13	/* the maximum number of idle cctx that will be pooled */
		14	#define MAX_IDLE_CCTX 8
		15
		16	#define PERL_VERSION_ATLEAST(a,b,c) \
		17	(PERL_REVISION > (a) \
		18	|| (PERL_REVISION == (a) \
		19	&& (PERL_VERSION > (b) \
		20	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		21
		22	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	23	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	24	# define PL_ppaddr ppaddr
14	# endif	25	# endif
15	# ifndef call_sv	26	# ifndef call_sv
16	# define call_sv perl_call_sv	27	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	38	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	39	# define IS_PADCONST(v) 0
29	# endif	40	# endif
30	#endif	41	#endif
31		42
		43	#include <stdio.h>
32	#include <errno.h>	44	#include <errno.h>
		45	#include <assert.h>
33		46
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	47	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	48	# undef STACKGUARD
36	#endif	49	#endif
37		50
…		…
53	# ifndef PAGESIZE	66	# ifndef PAGESIZE
54	# define PAGESIZE pagesize	67	# define PAGESIZE pagesize
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)	68	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;	69	static long pagesize;
57	# else	70	# else
58	# define BOOT_PAGESIZE	71	# define BOOT_PAGESIZE (void)0
59	# endif	72	# endif
		73	#else
		74	# define PAGESIZE 0
		75	# define BOOT_PAGESIZE (void)0
60	#endif	76	#endif
61
62	#define SUB_INIT "Coro::State::initialize"
63		77
64	/* The next macro should declare a variable stacklevel that contains and approximation	78	/* The next macro should declare a variable stacklevel that contains and approximation
65	* to the current C stack pointer. Its property is that it changes with each call	79	* to the current C stack pointer. Its property is that it changes with each call
66	* and should be unique. */	80	* and should be unique. */
		81	#define dSTACKLEVEL int stacklevel
67	#define dSTACKLEVEL void *stacklevel = &stacklevel	82	#define STACKLEVEL ((void *)&stacklevel)
68		83
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	84	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		85
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	86	#if __GNUC__ >= 3
		87	# define attribute(x) __attribute__(x)
		88	#else
		89	# define attribute(x)
		90	#endif
		91
		92	#define NOINLINE attribute ((noinline))
72		93
73	#include "CoroAPI.h"	94	#include "CoroAPI.h"
74		95
75	#ifdef USE_ITHREADS	96	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	97	static perl_mutex coro_mutex;
…		…
79	#else	100	#else
80	# define LOCK (void)0	101	# define LOCK (void)0
81	# define UNLOCK (void)0	102	# define UNLOCK (void)0
82	#endif	103	#endif
83		104
		105	struct io_state
		106	{
		107	int errorno;
		108	I32 laststype;
		109	int laststatval;
		110	Stat_t statcache;
		111	};
		112
84	static struct CoroAPI coroapi;	113	static struct CoroAPI coroapi;
85	static AV *main_mainstack; /* used to differentiate between $main and others */	114	static AV *main_mainstack; /* used to differentiate between $main and others */
86	static HV *coro_state_stash, *coro_stash;	115	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	116	static SV *coro_mortal; /* will be freed after next transfer */
88		117
89	/* this is actually not only the c stack but also c registers etc... */	118	static struct coro_cctx *cctx_first;
		119	static int cctx_count, cctx_idle;
		120
		121	/* this is a structure representing a c-level coroutine */
90	typedef struct {	122	typedef struct coro_cctx {
91	int refcnt; /* pointer reference counter */	123	struct coro_cctx *next;
92	int usecnt; /* shared by how many coroutines */
93	int gencnt; /* generation counter */
94		124
95	coro_context cctx;	125	/* the stack */
96
97	void *sptr;	126	void *sptr;
98	long ssize; /* positive == mmap, otherwise malloc */	127	long ssize; /* positive == mmap, otherwise malloc */
99	} coro_stack;
100		128
		129	/* cpu state */
		130	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		131	JMPENV *top_env;
		132	coro_context cctx;
		133
		134	int inuse;
		135
		136	#if USE_VALGRIND
		137	int valgrind_id;
		138	#endif
		139	} coro_cctx;
		140
		141	enum {
		142	CF_RUNNING = 0x0001, /* coroutine is running */
		143	CF_READY = 0x0002, /* coroutine is ready */
		144	CF_NEW = 0x0004, /* ahs never been switched to */
		145	};
		146
		147	/* this is a structure representing a perl-level coroutine */
101	struct coro {	148	struct coro {
102	/* the optional C context */	149	/* the c coroutine allocated to this perl coroutine, if any */
103	coro_stack *stack;	150	coro_cctx *cctx;
104	void *cursp;
105	int gencnt;
106
107	/* optionally saved, might be zero */
108	AV *defav;
109	SV *defsv;
110	SV *errsv;
111
112	/* saved global state not related to stacks */
113	U8 dowarn;
114	I32 in_eval;
115
116	/* the stacks and related info (callchain etc..) */
117	PERL_SI *curstackinfo;
118	AV *curstack;
119	AV *mainstack;
120	SV **stack_sp;
121	OP *op;
122	SV **curpad;
123	AV *comppad;
124	CV *compcv;
125	SV **stack_base;
126	SV **stack_max;
127	SV **tmps_stack;
128	I32 tmps_floor;
129	I32 tmps_ix;
130	I32 tmps_max;
131	I32 *markstack;
132	I32 *markstack_ptr;
133	I32 *markstack_max;
134	I32 *scopestack;
135	I32 scopestack_ix;
136	I32 scopestack_max;
137	ANY *savestack;
138	I32 savestack_ix;
139	I32 savestack_max;
140	OP **retstack;
141	I32 retstack_ix;
142	I32 retstack_max;
143	PMOP *curpm;
144	COP *curcop;
145	JMPENV *top_env;
146
147	/* coro process data */
148	int prio;
149		151
150	/* data associated with this coroutine (initial args) */	152	/* data associated with this coroutine (initial args) */
151	AV *args;	153	AV *args;
152	int refcnt;	154	int refcnt;
		155	int save; /* CORO_SAVE flags */
		156	int flags; /* CF_ flags */
		157
		158	/* optionally saved, might be zero */
		159	AV *defav; /* @_ */
		160	SV *defsv; /* $_ */
		161	SV *errsv; /* $@ */
		162	SV *irssv; /* $/ */
		163	SV *irssv_sv; /* real $/ cache */
		164
		165	#define VAR(name,type) type name;
		166	# include "state.h"
		167	#undef VAR
		168
		169	/* coro process data */
		170	int prio;
153	};	171	};
154		172
155	typedef struct coro *Coro__State;	173	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	174	typedef struct coro *Coro__State_or_hashref;
157		175
158	static AV *	176	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	177	coro_clone_padlist (CV *cv)
160	{	178	{
161	AV *padlist = CvPADLIST (cv);	179	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	180	AV *newpadlist, *newpad;
163		181
164	newpadlist = newAV ();	182	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	183	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	184	#if PERL_VERSION_ATLEAST (5,9,0)
		185	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		186	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	187	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	188	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	189	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	190	--AvFILLp (padlist);
173		191
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	192	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
176		194
177	return newpadlist;	195	return newpadlist;
178	}	196	}
179		197
180	static void	198	static void
181	free_padlist (pTHX_ AV *padlist)	199	free_padlist (AV *padlist)
182	{	200	{
183	/* may be during global destruction */	201	/* may be during global destruction */
184	if (SvREFCNT (padlist))	202	if (SvREFCNT (padlist))
185	{	203	{
186	I32 i = AvFILLp (padlist);	204	I32 i = AvFILLp (padlist);
…		…
207	AV *padlist;	225	AV *padlist;
208	AV *av = (AV *)mg->mg_obj;	226	AV *av = (AV *)mg->mg_obj;
209		227
210	/* casting is fun. */	228	/* casting is fun. */
211	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	229	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212	free_padlist (aTHX_ padlist);	230	free_padlist (padlist);
213		231
214	SvREFCNT_dec (av);	232	SvREFCNT_dec (av);
215		233
216	return 0;	234	return 0;
217	}	235	}
218		236
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	237	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		238
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	239	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		240
		241	#define CORO_MAGIC(cv) \
		242	SvMAGIC (cv) \
		243	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		244	? SvMAGIC (cv) \
		245	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		246	: 0
		247
223	/* the next two functions merely cache the padlists */	248	/* the next two functions merely cache the padlists */
224	static void	249	static void
225	get_padlist (pTHX_ CV *cv)	250	get_padlist (CV *cv)
226	{	251	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	252	MAGIC *mg = CORO_MAGIC (cv);
		253	AV *av;
228		254
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	255	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	256	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	257	else
232	{	258	{
233	#if 0	259	#if 0
234	/* this should work - but it doesn't :( */	260	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	261	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	262	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	263	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	264	SvREFCNT_dec (cp);
239	#else	265	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	266	CvPADLIST (cv) = coro_clone_padlist (cv);
241	#endif	267	#endif
242	}	268	}
243	}	269	}
244		270
245	static void	271	static void
246	put_padlist (pTHX_ CV *cv)	272	put_padlist (CV *cv)
247	{	273	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	274	MAGIC *mg = CORO_MAGIC (cv);
		275	AV *av;
249		276
250	if (!mg)	277	if (!mg)
251	{	278	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	279	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	280	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	281	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	282	mg->mg_obj = (SV *)newAV ();
256	}	283	}
257		284
258	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	285	av = (AV *)mg->mg_obj;
		286
		287	if (AvFILLp (av) >= AvMAX (av))
		288	av_extend (av, AvMAX (av) + 1);
		289
		290	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
259	}	291	}
260		292
261	#define SB do {	293	#define SB do {
262	#define SE } while (0)	294	#define SE } while (0)
263		295
264	#define LOAD(state) load_state(aTHX_ (state));
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
266
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	296	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
268		297
269	static void	298	static void
270	load_state(pTHX_ Coro__State c)	299	load_perl (Coro__State c)
271	{	300	{
272	PL_dowarn = c->dowarn;	301	#define VAR(name,type) PL_ ## name = c->name;
273	PL_in_eval = c->in_eval;	302	# include "state.h"
274		303	#undef VAR
275	PL_curstackinfo = c->curstackinfo;
276	PL_curstack = c->curstack;
277	PL_mainstack = c->mainstack;
278	PL_stack_sp = c->stack_sp;
279	PL_op = c->op;
280	PL_curpad = c->curpad;
281	PL_comppad = c->comppad;
282	PL_compcv = c->compcv;
283	PL_stack_base = c->stack_base;
284	PL_stack_max = c->stack_max;
285	PL_tmps_stack = c->tmps_stack;
286	PL_tmps_floor = c->tmps_floor;
287	PL_tmps_ix = c->tmps_ix;
288	PL_tmps_max = c->tmps_max;
289	PL_markstack = c->markstack;
290	PL_markstack_ptr = c->markstack_ptr;
291	PL_markstack_max = c->markstack_max;
292	PL_scopestack = c->scopestack;
293	PL_scopestack_ix = c->scopestack_ix;
294	PL_scopestack_max = c->scopestack_max;
295	PL_savestack = c->savestack;
296	PL_savestack_ix = c->savestack_ix;
297	PL_savestack_max = c->savestack_max;
298	#if PERL_VERSION < 9
299	PL_retstack = c->retstack;
300	PL_retstack_ix = c->retstack_ix;
301	PL_retstack_max = c->retstack_max;
302	#endif
303	PL_curpm = c->curpm;
304	PL_curcop = c->curcop;
305	PL_top_env = c->top_env;
306		304
307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	305	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	306	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
309	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	307	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		308	if (c->irssv)
		309	{
		310	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		311	SvREFCNT_dec (c->irssv);
		312	else
		313	{
		314	REPLACE_SV (PL_rs, c->irssv);
		315	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		316	sv_setsv (c->irssv_sv, PL_rs);
		317	}
		318	}
310		319
311	{	320	{
312	dSP;	321	dSP;
313	CV *cv;	322	CV *cv;
314		323
315	/* now do the ugly restore mess */	324	/* now do the ugly restore mess */
316	while ((cv = (CV *)POPs))	325	while ((cv = (CV *)POPs))
317	{	326	{
318	AV *padlist = (AV *)POPs;
319
320	if (padlist)
321	{
322	put_padlist (aTHX_ cv); /* mark this padlist as available */	327	put_padlist (cv); /* mark this padlist as available */
323	CvPADLIST(cv) = padlist;	328	CvDEPTH (cv) = PTR2IV (POPs);
324	}	329	CvPADLIST (cv) = (AV *)POPs;
325
326	++CvDEPTH(cv);
327	}	330	}
328		331
329	PUTBACK;	332	PUTBACK;
330	}	333	}
331	}	334	}
332		335
333	static void	336	static void
334	save_state(pTHX_ Coro__State c, int flags)	337	save_perl (Coro__State c)
335	{	338	{
336	{	339	{
337	dSP;	340	dSP;
338	I32 cxix = cxstack_ix;	341	I32 cxix = cxstack_ix;
339	PERL_CONTEXT *ccstk = cxstack;	342	PERL_CONTEXT *ccstk = cxstack;
…		…
350	{	353	{
351	while (cxix >= 0)	354	while (cxix >= 0)
352	{	355	{
353	PERL_CONTEXT *cx = &ccstk[cxix--];	356	PERL_CONTEXT *cx = &ccstk[cxix--];
354		357
355	if (CxTYPE(cx) == CXt_SUB)	358	if (CxTYPE (cx) == CXt_SUB)
356	{	359	{
357	CV *cv = cx->blk_sub.cv;	360	CV *cv = cx->blk_sub.cv;
		361
358	if (CvDEPTH(cv))	362	if (CvDEPTH (cv))
359	{	363	{
360	EXTEND (SP, CvDEPTH(cv)*2);	364	EXTEND (SP, 3);
361		365
362	while (--CvDEPTH(cv))
363	{
364	/* this tells the restore code to increment CvDEPTH */
365	PUSHs (Nullsv);
366	PUSHs ((SV *)cv);
367	}
368
369	PUSHs ((SV *)CvPADLIST(cv));	366	PUSHs ((SV *)CvPADLIST (cv));
		367	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
370	PUSHs ((SV *)cv);	368	PUSHs ((SV *)cv);
371		369
		370	CvDEPTH (cv) = 0;
372	get_padlist (aTHX_ cv);	371	get_padlist (cv);
373	}	372	}
374	}	373	}
375	#ifdef CXt_FORMAT	374	#ifdef CXt_FORMAT
376	else if (CxTYPE(cx) == CXt_FORMAT)	375	else if (CxTYPE (cx) == CXt_FORMAT)
377	{	376	{
378	/* I never used formats, so how should I know how these are implemented? */	377	/* I never used formats, so how should I know how these are implemented? */
379	/* my bold guess is as a simple, plain sub... */	378	/* my bold guess is as a simple, plain sub... */
380	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	379	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381	}	380	}
…		…
391	}	390	}
392		391
393	PUTBACK;	392	PUTBACK;
394	}	393	}
395		394
396	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	395	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	396	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
398	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	397	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		398	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
399		399
400	c->dowarn = PL_dowarn;	400	#define VAR(name,type)c->name = PL_ ## name;
401	c->in_eval = PL_in_eval;	401	# include "state.h"
402		402	#undef VAR
403	c->curstackinfo = PL_curstackinfo;
404	c->curstack = PL_curstack;
405	c->mainstack = PL_mainstack;
406	c->stack_sp = PL_stack_sp;
407	c->op = PL_op;
408	c->curpad = PL_curpad;
409	c->comppad = PL_comppad;
410	c->compcv = PL_compcv;
411	c->stack_base = PL_stack_base;
412	c->stack_max = PL_stack_max;
413	c->tmps_stack = PL_tmps_stack;
414	c->tmps_floor = PL_tmps_floor;
415	c->tmps_ix = PL_tmps_ix;
416	c->tmps_max = PL_tmps_max;
417	c->markstack = PL_markstack;
418	c->markstack_ptr = PL_markstack_ptr;
419	c->markstack_max = PL_markstack_max;
420	c->scopestack = PL_scopestack;
421	c->scopestack_ix = PL_scopestack_ix;
422	c->scopestack_max = PL_scopestack_max;
423	c->savestack = PL_savestack;
424	c->savestack_ix = PL_savestack_ix;
425	c->savestack_max = PL_savestack_max;
426	#if PERL_VERSION < 9
427	c->retstack = PL_retstack;
428	c->retstack_ix = PL_retstack_ix;
429	c->retstack_max = PL_retstack_max;
430	#endif
431	c->curpm = PL_curpm;
432	c->curcop = PL_curcop;
433	c->top_env = PL_top_env;
434	}	403	}
435		404
436	/*	405	/*
437	* allocate various perl stacks. This is an exact copy	406	* allocate various perl stacks. This is an exact copy
438	* of perl.c:init_stacks, except that it uses less memory	407	* of perl.c:init_stacks, except that it uses less memory
439	* on the (sometimes correct) assumption that coroutines do	408	* on the (sometimes correct) assumption that coroutines do
440	* not usually need a lot of stackspace.	409	* not usually need a lot of stackspace.
441	*/	410	*/
442	static void	411	static void
443	coro_init_stacks (pTHX)	412	coro_init_stacks ()
444	{	413	{
445	LOCK;
446
447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	414	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
448	PL_curstackinfo->si_type = PERLSI_MAIN;	415	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	416	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	417	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		418
452	PL_stack_base = AvARRAY(PL_curstack);	419	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	420	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	421	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		422
456	New(50,PL_tmps_stack,96,SV*);	423	New(50,PL_tmps_stack,128,SV*);
457	PL_tmps_floor = -1;	424	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	425	PL_tmps_ix = -1;
459	PL_tmps_max = 96;	426	PL_tmps_max = 128;
460		427
461	New(54,PL_markstack,16,I32);	428	New(54,PL_markstack,32,I32);
462	PL_markstack_ptr = PL_markstack;	429	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 16;	430	PL_markstack_max = PL_markstack + 32;
464		431
465	#ifdef SET_MARK_OFFSET	432	#ifdef SET_MARK_OFFSET
466	SET_MARK_OFFSET;	433	SET_MARK_OFFSET;
467	#endif	434	#endif
468		435
469	New(54,PL_scopestack,16,I32);	436	New(54,PL_scopestack,32,I32);
470	PL_scopestack_ix = 0;	437	PL_scopestack_ix = 0;
471	PL_scopestack_max = 16;	438	PL_scopestack_max = 32;
472		439
473	New(54,PL_savestack,96,ANY);	440	New(54,PL_savestack,64,ANY);
474	PL_savestack_ix = 0;	441	PL_savestack_ix = 0;
475	PL_savestack_max = 96;	442	PL_savestack_max = 64;
476		443
477	#if PERL_VERSION < 9	444	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,8,OP*);	445	New(54,PL_retstack,16,OP*);
479	PL_retstack_ix = 0;	446	PL_retstack_ix = 0;
480	PL_retstack_max = 8;	447	PL_retstack_max = 16;
481	#endif	448	#endif
482
483	UNLOCK;
484	}	449	}
485		450
486	/*	451	/*
487	* destroy the stacks, the callchain etc...	452	* destroy the stacks, the callchain etc...
488	*/	453	*/
489	static void	454	static void
490	destroy_stacks(pTHX)	455	coro_destroy_stacks ()
491	{	456	{
492	if (!IN_DESTRUCT)	457	if (!IN_DESTRUCT)
493	{	458	{
494	/* is this ugly, I ask? */	459	/* is this ugly, I ask? */
495	LEAVE_SCOPE (0);	460	LEAVE_SCOPE (0);
…		…
526		491
527	Safefree (PL_tmps_stack);	492	Safefree (PL_tmps_stack);
528	Safefree (PL_markstack);	493	Safefree (PL_markstack);
529	Safefree (PL_scopestack);	494	Safefree (PL_scopestack);
530	Safefree (PL_savestack);	495	Safefree (PL_savestack);
531	#if PERL_VERSION < 9	496	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree (PL_retstack);	497	Safefree (PL_retstack);
533	#endif	498	#endif
534	}	499	}
535		500
536	static void	501	static void
537	allocate_stack (Coro__State ctx, int alloc)	502	setup_coro (struct coro *coro)
538	{
539	coro_stack *stack;
540
541	New (0, stack, 1, coro_stack);
542
543	stack->refcnt = 1;
544	stack->usecnt = 1;
545	stack->gencnt = ctx->gencnt = 0;
546
547	if (alloc)
548	{
549	#if HAVE_MMAP
550	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
551	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
552	if (stack->sptr != (void *)-1)
553	{
554	# if STACKGUARD
555	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
556	# endif
557	}
558	else
559	#endif
560	{
561	stack->ssize = - (STACKSIZE * (long)sizeof (long));
562	New (0, stack->sptr, STACKSIZE, long);
563	}
564	}
565	else
566	stack->sptr = 0;
567
568	ctx->stack = stack;
569	}
570
571	static void
572	deallocate_stack (Coro__State ctx)
573	{
574	coro_stack *stack = ctx->stack;
575
576	ctx->stack = 0;
577
578	if (stack)
579	{
580	if (!--stack->refcnt)
581	{
582	#ifdef HAVE_MMAP
583	if (stack->ssize > 0 && stack->sptr)
584	munmap (stack->sptr, stack->ssize);
585	else
586	#endif
587	Safefree (stack->sptr);
588
589	Safefree (stack);
590	}
591	else if (ctx->gencnt == stack->gencnt)
592	--stack->usecnt;
593	}
594	}
595
596	static void
597	setup_coro (void *arg)
598	{	503	{
599	/*	504	/*
600	* emulate part of the perl startup here.	505	* emulate part of the perl startup here.
601	*/	506	*/
602	dTHX;	507
		508	coro_init_stacks ();
		509
		510	PL_curcop = &PL_compiling;
		511	PL_in_eval = EVAL_NULL;
		512	PL_curpm = 0;
		513	PL_localizing = 0;
		514	PL_dirty = 0;
		515	PL_restartop = 0;
		516
		517	{
		518	dSP;
		519	LOGOP myop;
		520
		521	SvREFCNT_dec (GvAV (PL_defgv));
		522	GvAV (PL_defgv) = coro->args; coro->args = 0;
		523
		524	Zero (&myop, 1, LOGOP);
		525	myop.op_next = Nullop;
		526	myop.op_flags = OPf_WANT_VOID;
		527
		528	PUSHMARK (SP);
		529	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		530	PUTBACK;
		531	PL_op = (OP *)&myop;
		532	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		533	SPAGAIN;
		534	}
		535
		536	ENTER; /* necessary e.g. for dounwind */
		537	}
		538
		539	static void
		540	free_coro_mortal ()
		541	{
		542	if (coro_mortal)
		543	{
		544	SvREFCNT_dec (coro_mortal);
		545	coro_mortal = 0;
		546	}
		547	}
		548
		549	/* inject a fake call to Coro::State::_cctx_init into the execution */
		550	static void NOINLINE
		551	prepare_cctx (coro_cctx *cctx)
		552	{
603	dSP;	553	dSP;
604	Coro__State ctx = (Coro__State)arg;	554	LOGOP myop;
605	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
606		555
607	coro_init_stacks (aTHX);	556	Zero (&myop, 1, LOGOP);
608	/*PL_curcop = 0;*/	557	myop.op_next = PL_op;
609	/*PL_in_eval = PL_in_eval;*/ /* inherit */	558	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
610	SvREFCNT_dec (GvAV (PL_defgv));
611	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
612		559
		560	PUSHMARK (SP);
		561	EXTEND (SP, 2);
		562	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		563	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		564	PUTBACK;
		565	PL_op = (OP *)&myop;
		566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
613	SPAGAIN;	567	SPAGAIN;
614
615	if (ctx->stack)
616	{
617	ctx->cursp = 0;
618
619	PUSHMARK(SP);
620	PUTBACK;
621	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
622
623	if (SvTRUE (ERRSV))
624	croak (NULL);
625	else
626	croak ("FATAL: CCTXT coroutine returned!");
627	}
628	else
629	{
630	UNOP myop;
631
632	Zero(&myop, 1, UNOP);
633	myop.op_next = Nullop;
634	myop.op_flags = OPf_WANT_VOID;
635
636	PL_op = (OP *)&myop;
637
638	PUSHMARK(SP);
639	XPUSHs (sub_init);
640	/*
641	* the next line is slightly wrong, as PL_op->op_next
642	* is actually being executed so we skip the first op.
643	* that doesn't matter, though, since it is only
644	* pp_nextstate and we never return...
645	* ah yes, and I don't care anyways ;)
646	*/
647	PUTBACK;
648	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
649	SPAGAIN;
650
651	ENTER; /* necessary e.g. for dounwind */
652	}
653	}	568	}
654		569
655	static void	570	static void
656	continue_coro (void *arg)	571	coro_run (void *arg)
657	{	572	{
		573	/* coro_run is the alternative tail of transfer(), so unlock here. */
		574	UNLOCK;
		575
658	/*	576	/*
659	* this is a _very_ stripped down perl interpreter ;)	577	* this is a _very_ stripped down perl interpreter ;)
660	*/	578	*/
661	dTHX;
662	Coro__State ctx = (Coro__State)arg;
663
664	PL_top_env = &PL_start_env;	579	PL_top_env = &PL_start_env;
665		580
666	ctx->cursp = 0;	581	/* inject call to cctx_init */
667	PL_op = PL_op->op_next;	582	prepare_cctx ((coro_cctx *)arg);
668	CALLRUNOPS(aTHX);
669		583
		584	/* somebody will hit me for both perl_run and PL_restartop */
		585	PL_restartop = PL_op;
		586	perl_run (PL_curinterp);
		587
		588	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
670	abort ();	589	abort ();
671	}	590	}
672		591
		592	static coro_cctx *
		593	cctx_new ()
		594	{
		595	coro_cctx *cctx;
		596
		597	++cctx_count;
		598
		599	Newz (0, cctx, 1, coro_cctx);
		600
		601	#if HAVE_MMAP
		602
		603	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		604	/* mmap supposedly does allocate-on-write for us */
		605	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		606
		607	if (cctx->sptr == (void *)-1)
		608	{
		609	perror ("FATAL: unable to mmap stack for coroutine");
		610	_exit (EXIT_FAILURE);
		611	}
		612
		613	# if STACKGUARD
		614	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		615	# endif
		616
		617	#else
		618
		619	cctx->ssize = STACKSIZE * (long)sizeof (long);
		620	New (0, cctx->sptr, STACKSIZE, long);
		621
		622	if (!cctx->sptr)
		623	{
		624	perror ("FATAL: unable to malloc stack for coroutine");
		625	_exit (EXIT_FAILURE);
		626	}
		627
		628	#endif
		629
		630	#if USE_VALGRIND
		631	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		632	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		633	cctx->ssize + (char *)cctx->sptr
		634	);
		635	#endif
		636
		637	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		638
		639	return cctx;
		640	}
		641
		642	static void
		643	cctx_destroy (coro_cctx *cctx)
		644	{
		645	if (!cctx)
		646	return;
		647
		648	--cctx_count;
		649
		650	#if USE_VALGRIND
		651	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		652	#endif
		653
		654	#if HAVE_MMAP
		655	munmap (cctx->sptr, cctx->ssize);
		656	#else
		657	Safefree (cctx->sptr);
		658	#endif
		659
		660	Safefree (cctx);
		661	}
		662
		663	static coro_cctx *
		664	cctx_get ()
		665	{
		666	coro_cctx *cctx;
		667
		668	if (cctx_first)
		669	{
		670	cctx = cctx_first;
		671	cctx_first = cctx->next;
		672	--cctx_idle;
		673	}
		674	else
		675	{
		676	cctx = cctx_new ();
		677	PL_op = PL_op->op_next;
		678	}
		679
		680	return cctx;
		681	}
		682
		683	static void
		684	cctx_put (coro_cctx *cctx)
		685	{
		686	/* free another cctx if overlimit */
		687	if (cctx_idle >= MAX_IDLE_CCTX)
		688	{
		689	coro_cctx *first = cctx_first;
		690	cctx_first = first->next;
		691	--cctx_idle;
		692
		693	assert (!first->inuse);
		694	cctx_destroy (first);
		695	}
		696
		697	++cctx_idle;
		698	cctx->next = cctx_first;
		699	cctx_first = cctx;
		700	}
		701
673	/* never call directly, always through the coro_state_transfer global variable */	702	/* never call directly, always through the coro_state_transfer global variable */
674	static void	703	static void NOINLINE
675	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	704	transfer (struct coro *prev, struct coro *next)
676	{	705	{
677	dSTACKLEVEL;	706	dSTACKLEVEL;
678		707
		708	/* sometimes transfer is only called to set idle_sp */
		709	if (!next)
		710	{
		711	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		712	assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */
		713	}
679	if (prev != next)	714	else if (prev != next)
680	{	715	{
681	/* has this coro been created yet? */	716	coro_cctx *prev__cctx;
682	if (next->mainstack)	717
		718	if (prev->flags & CF_NEW)
683	{	719	{
684	LOCK;	720	/* create a new empty context */
685	SAVE (prev, flags);	721	Newz (0, prev->cctx, 1, coro_cctx);
686	LOAD (next);	722	prev->cctx->inuse = 1;
687	UNLOCK;	723	prev->flags &= ~CF_NEW;
688		724	prev->flags |= CF_RUNNING;
689	/* mark this state as in-use */
690	next->mainstack = 0;
691	next->tmps_ix = -2;
692
693	/* stacklevel changed? if yes, grab the stack for us! */
694	if (flags & TRANSFER_SAVE_CCTXT)
695	{
696	if (!prev->stack)
697	allocate_stack (prev, 0);
698	else if (prev->cursp != stacklevel
699	&& prev->stack->usecnt > 1)
700	{
701	prev->gencnt = ++prev->stack->gencnt;
702	prev->stack->usecnt = 1;
703	}
704
705	/* has our stack been invalidated? */
706	if (next->stack && next->stack->gencnt != next->gencnt)
707	{
708	deallocate_stack (next);
709	allocate_stack (next, 1);
710	coro_create (&(next->stack->cctx),
711	continue_coro, (void *)next,
712	next->stack->sptr, labs (next->stack->ssize));
713	}
714
715	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716	prev->cursp = stacklevel;
717	/* don't add any code here */
718	}
719	else
720	next->cursp = stacklevel;
721	}	725	}
722	else if (next->tmps_ix == -2)	726
723	croak ("tried to transfer to running coroutine");	727	/*TODO: must not croak here */
		728	if (!prev->flags & CF_RUNNING)
		729	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		730
		731	if (next->flags & CF_RUNNING)
		732	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		733
		734	prev->flags &= ~CF_RUNNING;
		735	next->flags |= CF_RUNNING;
		736
		737	LOCK;
		738
		739	if (next->flags & CF_NEW)
		740	{
		741	/* need to start coroutine */
		742	next->flags &= ~CF_NEW;
		743	/* first get rid of the old state */
		744	save_perl (prev);
		745	/* setup coroutine call */
		746	setup_coro (next);
		747	/* need a new stack */
		748	assert (!next->cctx);
		749	}
724	else	750	else
725	{	751	{
726	LOCK;	752	/* coroutine already started */
727	SAVE (prev, -1); /* first get rid of the old state */	753	save_perl (prev);
728	UNLOCK;	754	load_perl (next);
729
730	/* create the coroutine for the first time */
731	if (flags & TRANSFER_SAVE_CCTXT)
732	{
733	if (!prev->stack)
734	allocate_stack (prev, 0);
735
736	/* the new coroutine starts with start_env again */
737	PL_top_env = &PL_start_env;
738
739	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
740	{
741	setup_coro (next);
742	next->cursp = stacklevel;
743
744	prev->stack->refcnt++;
745	prev->stack->usecnt++;
746	next->stack = prev->stack;
747	next->gencnt = prev->gencnt;
748	}
749	else
750	{
751	assert (!next->stack);
752	allocate_stack (next, 1);
753	coro_create (&(next->stack->cctx),
754	setup_coro, (void *)next,
755	next->stack->sptr, labs (next->stack->ssize));
756	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
757	prev->cursp = stacklevel;
758	/* don't add any code here */
759	}
760	}
761	else
762	{
763	setup_coro (next);
764	next->cursp = stacklevel;
765	}
766	}	755	}
		756
		757	prev__cctx = prev->cctx;
		758
		759	/* possibly "free" the cctx */
		760	if (prev__cctx->idle_sp == STACKLEVEL)
		761	{
		762	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		763	assert (PL_top_env == prev__cctx->top_env);
		764
		765	prev->cctx = 0;
		766
		767	cctx_put (prev__cctx);
		768	prev__cctx->inuse = 0;
		769	}
		770
		771	if (!next->cctx)
		772	{
		773	next->cctx = cctx_get ();
		774	assert (!next->cctx->inuse);
		775	next->cctx->inuse = 1;
		776	}
		777
		778	if (prev__cctx != next->cctx)
		779	{
		780	prev__cctx->top_env = PL_top_env;
		781	PL_top_env = next->cctx->top_env;
		782	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		783	}
		784
		785	free_coro_mortal ();
		786
		787	UNLOCK;
767	}	788	}
768
769	LOCK;
770	if (coro_mortal)
771	{
772	SvREFCNT_dec (coro_mortal);
773	coro_mortal = 0;
774	}
775	UNLOCK;
776	}	789	}
777		790
778	/* use this function pointer to call the above function */	791	struct transfer_args
779	/* this is done to increase chances of the compiler not inlining the call */	792	{
780	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	793	struct coro *prev, *next;
		794	};
		795
		796	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
781		797
782	static void	798	static void
783	coro_state_destroy (struct coro *coro)	799	coro_state_destroy (struct coro *coro)
784	{	800	{
785	if (coro->refcnt--)	801	if (coro->refcnt--)
786	return;	802	return;
787		803
788	if (coro->mainstack && coro->mainstack != main_mainstack)	804	if (coro->mainstack && coro->mainstack != main_mainstack)
789	{	805	{
790	struct coro temp;	806	struct coro temp;
		807	Zero (&temp, 1, struct coro);
		808	temp.save = CORO_SAVE_ALL;
791		809
792	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	810	if (coro->flags & CF_RUNNING)
793	LOAD (aTHX_ coro);	811	croak ("FATAL: tried to destroy currently running coroutine");
794		812
		813	save_perl (&temp);
		814	load_perl (coro);
		815
795	destroy_stacks (aTHX);	816	coro_destroy_stacks ();
796		817
797	LOAD ((&temp)); /* this will get rid of defsv etc.. */	818	load_perl (&temp); /* this will get rid of defsv etc.. */
798		819
799	coro->mainstack = 0;	820	coro->mainstack = 0;
800	}	821	}
801		822
802	deallocate_stack (coro);	823	cctx_destroy (coro->cctx);
803	SvREFCNT_dec (coro->args);	824	SvREFCNT_dec (coro->args);
804	Safefree (coro);	825	Safefree (coro);
805	}	826	}
806		827
807	static int	828	static int
808	coro_state_clear (SV *sv, MAGIC *mg)	829	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
809	{	830	{
810	struct coro *coro = (struct coro *)mg->mg_ptr;	831	struct coro *coro = (struct coro *)mg->mg_ptr;
811	mg->mg_ptr = 0;	832	mg->mg_ptr = 0;
812		833
813	coro_state_destroy (coro);	834	coro_state_destroy (coro);
814		835
815	return 0;	836	return 0;
816	}	837	}
817		838
818	static int	839	static int
819	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	840	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
820	{	841	{
821	struct coro *coro = (struct coro *)mg->mg_ptr;	842	struct coro *coro = (struct coro *)mg->mg_ptr;
822		843
823	++coro->refcnt;	844	++coro->refcnt;
824		845
825	return 0;	846	return 0;
826	}	847	}
827		848
828	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	849	static MGVTBL coro_state_vtbl = {
		850	0, 0, 0, 0,
		851	coro_state_clear,
		852	0,
		853	#ifdef MGf_DUP
		854	coro_state_dup,
		855	#else
		856	# define MGf_DUP 0
		857	#endif
		858	};
829		859
830	static struct coro *	860	static struct coro *
831	SvSTATE (SV *coro)	861	SvSTATE (SV *coro)
832	{	862	{
833	HV *stash;	863	HV *stash;
…		…
848	assert (mg->mg_type == PERL_MAGIC_ext);	878	assert (mg->mg_type == PERL_MAGIC_ext);
849	return (struct coro *)mg->mg_ptr;	879	return (struct coro *)mg->mg_ptr;
850	}	880	}
851		881
852	static void	882	static void
		883	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		884	{
		885	ta->prev = SvSTATE (prev_sv);
		886	ta->next = SvSTATE (next_sv);
		887	}
		888
		889	static void
853	api_transfer (pTHX_ SV *prev, SV *next, int flags)	890	api_transfer (SV *prev_sv, SV *next_sv)
854	{	891	{
855	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	892	struct transfer_args ta;
		893
		894	prepare_transfer (&ta, prev_sv, next_sv);
		895	TRANSFER (ta);
		896	}
		897
		898	static int
		899	api_save (SV *coro_sv, int new_save)
		900	{
		901	struct coro *coro = SvSTATE (coro_sv);
		902	int old_save = coro->save;
		903
		904	if (new_save >= 0)
		905	coro->save = new_save;
		906
		907	return old_save;
856	}	908	}
857		909
858	/** Coro ********************************************************************/	910	/** Coro ********************************************************************/
859		911
860	#define PRIO_MAX 3	912	#define PRIO_MAX 3
…		…
863	#define PRIO_LOW -1	915	#define PRIO_LOW -1
864	#define PRIO_IDLE -3	916	#define PRIO_IDLE -3
865	#define PRIO_MIN -4	917	#define PRIO_MIN -4
866		918
867	/* for Coro.pm */	919	/* for Coro.pm */
868	static GV *coro_current, *coro_idle;	920	static SV *coro_current;
869	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	921	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
870	static int coro_nready;	922	static int coro_nready;
871		923
872	static void	924	static void
873	coro_enq (pTHX_ SV *sv)	925	coro_enq (SV *coro_sv)
874	{	926	{
875	int prio;
876
877	if (SvTYPE (sv) != SVt_PVHV)
878	croak ("Coro::ready tried to enqueue something that is not a coroutine");
879
880	prio = SvSTATE (sv)->prio;
881
882	av_push (coro_ready [prio - PRIO_MIN], sv);	927	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
883	coro_nready++;	928	coro_nready++;
884	}	929	}
885		930
886	static SV *	931	static SV *
887	coro_deq (pTHX_ int min_prio)	932	coro_deq (int min_prio)
888	{	933	{
889	int prio = PRIO_MAX - PRIO_MIN;	934	int prio = PRIO_MAX - PRIO_MIN;
890		935
891	min_prio -= PRIO_MIN;	936	min_prio -= PRIO_MIN;
892	if (min_prio < 0)	937	if (min_prio < 0)
…		…
900	}	945	}
901		946
902	return 0;	947	return 0;
903	}	948	}
904		949
905	static void	950	static int
906	api_ready (SV *coro)	951	api_ready (SV *coro_sv)
907	{	952	{
908	dTHX;	953	struct coro *coro;
909		954
910	if (SvROK (coro))	955	if (SvROK (coro_sv))
911	coro = SvRV (coro);	956	coro_sv = SvRV (coro_sv);
		957
		958	coro = SvSTATE (coro_sv);
		959
		960	if (coro->flags & CF_READY)
		961	return 0;
		962
		963	#if 0 /* this is actually harmless */
		964	if (coro->flags & CF_RUNNING)
		965	croak ("Coro::ready called on currently running coroutine");
		966	#endif
		967
		968	coro->flags |= CF_READY;
912		969
913	LOCK;	970	LOCK;
914	coro_enq (aTHX_ SvREFCNT_inc (coro));	971	coro_enq (SvREFCNT_inc (coro_sv));
915	UNLOCK;	972	UNLOCK;
916	}
917		973
		974	return 1;
		975	}
		976
918	static void	977	static int
919	api_schedule (void)	978	api_is_ready (SV *coro_sv)
920	{	979	{
921	dTHX;	980	return !!SvSTATE (coro_sv)->flags & CF_READY;
		981	}
922		982
		983	static void
		984	prepare_schedule (struct transfer_args *ta)
		985	{
923	SV *prev, *next;	986	SV *prev, *next;
924	SV *current = GvSV (coro_current);
925		987
926	for (;;)	988	for (;;)
927	{	989	{
928	LOCK;	990	LOCK;
929
930	next = coro_deq (aTHX_ PRIO_MIN);	991	next = coro_deq (PRIO_MIN);
		992	UNLOCK;
931		993
932	if (next)	994	if (next)
933	break;	995	break;
934		996
935	UNLOCK;
936
937	{	997	{
938	dSP;	998	dSP;
939		999
940	ENTER;	1000	ENTER;
941	SAVETMPS;	1001	SAVETMPS;
942		1002
943	PUSHMARK (SP);	1003	PUSHMARK (SP);
944	PUTBACK;	1004	PUTBACK;
945	call_sv (GvSV (coro_idle), G_DISCARD);	1005	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
946		1006
947	FREETMPS;	1007	FREETMPS;
948	LEAVE;	1008	LEAVE;
949	}	1009	}
950	}	1010	}
951		1011
952	prev = SvRV (current);	1012	prev = SvRV (coro_current);
953	SvRV (current) = next;	1013	SvRV_set (coro_current, next);
954		1014
955	/* free this only after the transfer */	1015	/* free this only after the transfer */
		1016	LOCK;
		1017	free_coro_mortal ();
		1018	UNLOCK;
956	coro_mortal = prev;	1019	coro_mortal = prev;
957		1020
958	UNLOCK;	1021	assert (!SvROK(prev));//D
		1022	assert (!SvROK(next));//D
959		1023
960	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),	1024	ta->prev = SvSTATE (prev);
961	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);	1025	ta->next = SvSTATE (next);
		1026
		1027	assert (ta->next->flags & CF_READY);
		1028	ta->next->flags &= ~CF_READY;
		1029	}
		1030
		1031	static void
		1032	prepare_cede (struct transfer_args *ta)
		1033	{
		1034	api_ready (coro_current);
		1035
		1036	prepare_schedule (ta);
		1037	}
		1038
		1039	static void
		1040	api_schedule (void)
		1041	{
		1042	struct transfer_args ta;
		1043
		1044	prepare_schedule (&ta);
		1045	TRANSFER (ta);
962	}	1046	}
963		1047
964	static void	1048	static void
965	api_cede (void)	1049	api_cede (void)
966	{	1050	{
967	dTHX;	1051	struct transfer_args ta;
968		1052
969	LOCK;	1053	prepare_cede (&ta);
970	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1054	TRANSFER (ta);
971	UNLOCK;
972
973	api_schedule ();
974	}	1055	}
975		1056
976	MODULE = Coro::State PACKAGE = Coro::State	1057	MODULE = Coro::State PACKAGE = Coro::State
977		1058
978	PROTOTYPES: DISABLE	1059	PROTOTYPES: DISABLE
…		…
984	#endif	1065	#endif
985	BOOT_PAGESIZE;	1066	BOOT_PAGESIZE;
986		1067
987	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1068	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
988		1069
989	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1070	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
990	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1071	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
991	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1072	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1073	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
992	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1074	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
993		1075
994	main_mainstack = PL_mainstack;	1076	main_mainstack = PL_mainstack;
995		1077
996	coroapi.ver = CORO_API_VERSION;	1078	coroapi.ver = CORO_API_VERSION;
997	coroapi.transfer = api_transfer;	1079	coroapi.transfer = api_transfer;
…		…
1007	HV *hv;	1089	HV *hv;
1008	int i;	1090	int i;
1009		1091
1010	Newz (0, coro, 1, struct coro);	1092	Newz (0, coro, 1, struct coro);
1011	coro->args = newAV ();	1093	coro->args = newAV ();
1012		1094	coro->save = CORO_SAVE_ALL;
1013	for (i = 1; i < items; i++)	1095	coro->flags = CF_NEW;
1014	av_push (coro->args, newSVsv (ST (i)));
1015
1016	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1017	/*coro->stack = 0;*/
1018		1096
1019	hv = newHV ();	1097	hv = newHV ();
1020	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1098	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1021	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1099	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1100
		1101	for (i = 1; i < items; i++)
		1102	av_push (coro->args, newSVsv (ST (i)));
1022	}	1103	}
1023	OUTPUT:	1104	OUTPUT:
1024	RETVAL	1105	RETVAL
1025		1106
		1107	int
		1108	save (SV *coro, int new_save = -1)
		1109	CODE:
		1110	RETVAL = api_save (coro, new_save);
		1111	OUTPUT:
		1112	RETVAL
		1113
1026	void	1114	void
1027	transfer(prev, next, flags)	1115	_set_stacklevel (...)
1028	SV *prev	1116	ALIAS:
1029	SV *next	1117	Coro::State::transfer = 1
1030	int flags	1118	Coro::schedule = 2
		1119	Coro::cede = 3
1031	CODE:	1120	CODE:
1032	PUTBACK;
1033	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
1034	SPAGAIN;
1035
1036	int
1037	prio (Coro::State coro, int newprio = 0)
1038	ALIAS:
1039	nice = 1
1040	CODE:
1041	{	1121	{
1042	RETVAL = coro->prio;	1122	struct transfer_args ta;
1043		1123
1044	if (items > 1)	1124	switch (ix)
1045	{	1125	{
		1126	case 0:
		1127	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1128	ta.next = 0;
		1129	break;
		1130
		1131	case 1:
1046	if (ix)	1132	if (items != 2)
1047	newprio += coro->prio;	1133	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1048		1134
1049	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1135	prepare_transfer (&ta, ST (0), ST (1));
1050	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1136	break;
1051		1137
1052	coro->prio = newprio;	1138	case 2:
		1139	prepare_schedule (&ta);
		1140	break;
		1141
		1142	case 3:
		1143	prepare_cede (&ta);
		1144	break;
1053	}	1145	}
		1146
		1147	TRANSFER (ta);
1054	}	1148	}
1055		1149
1056	void	1150	void
1057	_clone_state_from (SV *dst, SV *src)	1151	_clone_state_from (SV *dst, SV *src)
1058	CODE:	1152	CODE:
…		…
1070	int code	1164	int code
1071	PROTOTYPE: $	1165	PROTOTYPE: $
1072	CODE:	1166	CODE:
1073	_exit (code);	1167	_exit (code);
1074		1168
1075	MODULE = Coro::State PACKAGE = Coro::Cont	1169	int
		1170	cctx_count ()
		1171	CODE:
		1172	RETVAL = cctx_count;
		1173	OUTPUT:
		1174	RETVAL
1076		1175
1077	void	1176	int
1078	yield (...)	1177	cctx_idle ()
1079	PROTOTYPE: @	1178	CODE:
1080	CODE:	1179	RETVAL = cctx_idle;
1081	{	1180	OUTPUT:
1082	SV *yieldstack;	1181	RETVAL
1083	SV *sv;
1084	AV *defav = GvAV (PL_defgv);
1085	struct coro *prev, *next;
1086
1087	yieldstack = *hv_fetch (
1088	(HV *)SvRV (GvSV (coro_current)),
1089	"yieldstack", sizeof ("yieldstack") - 1,
1090	0
1091	);
1092
1093	/* set up @_ -- ugly */
1094	av_clear (defav);
1095	av_fill (defav, items - 1);
1096	while (items--)
1097	av_store (defav, items, SvREFCNT_inc (ST(items)));
1098
1099	sv = av_pop ((AV *)SvRV (yieldstack));
1100	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1101	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1102	SvREFCNT_dec (sv);
1103
1104	coro_state_transfer (aTHX_ prev, next, 0);
1105	}
1106		1182
1107	MODULE = Coro::State PACKAGE = Coro	1183	MODULE = Coro::State PACKAGE = Coro
1108		1184
1109	BOOT:	1185	BOOT:
1110	{	1186	{
…		…
1117	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1193	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1118	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1194	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1119	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1195	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1120	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1196	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1121		1197
1122	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1198	coro_current = get_sv ("Coro::current", FALSE);
1123	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1199	SvREADONLY_on (coro_current);
1124		1200
1125	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1201	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1126	coro_ready[i] = newAV ();	1202	coro_ready[i] = newAV ();
1127		1203
1128	{	1204	{
1129	SV *sv = perl_get_sv("Coro::API", 1);	1205	SV *sv = perl_get_sv("Coro::API", 1);
1130		1206
1131	coroapi.schedule = api_schedule;	1207	coroapi.schedule = api_schedule;
		1208	coroapi.save = api_save;
1132	coroapi.cede = api_cede;	1209	coroapi.cede = api_cede;
1133	coroapi.ready = api_ready;	1210	coroapi.ready = api_ready;
		1211	coroapi.is_ready = api_is_ready;
1134	coroapi.nready = &coro_nready;	1212	coroapi.nready = &coro_nready;
1135	coroapi.current = coro_current;	1213	coroapi.current = coro_current;
1136		1214
1137	GCoroAPI = &coroapi;	1215	GCoroAPI = &coroapi;
1138	sv_setiv (sv, (IV)&coroapi);	1216	sv_setiv (sv, (IV)&coroapi);
1139	SvREADONLY_on (sv);	1217	SvREADONLY_on (sv);
1140	}	1218	}
1141	}	1219	}
1142		1220
1143	#if !PERL_MICRO
1144
1145	void	1221	void
1146	ready (self)	1222	_set_current (SV *current)
1147	SV * self
1148	PROTOTYPE: $	1223	PROTOTYPE: $
1149	CODE:	1224	CODE:
1150	api_ready (self);	1225	SvREFCNT_dec (SvRV (coro_current));
		1226	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1151		1227
1152	#endif	1228	int
		1229	prio (Coro::State coro, int newprio = 0)
		1230	ALIAS:
		1231	nice = 1
		1232	CODE:
		1233	{
		1234	RETVAL = coro->prio;
		1235
		1236	if (items > 1)
		1237	{
		1238	if (ix)
		1239	newprio += coro->prio;
		1240
		1241	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1242	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1243
		1244	coro->prio = newprio;
		1245	}
		1246	}
		1247
		1248	SV *
		1249	ready (SV *self)
		1250	PROTOTYPE: $
		1251	CODE:
		1252	RETVAL = boolSV (api_ready (self));
		1253	OUTPUT:
		1254	RETVAL
		1255
		1256	SV *
		1257	is_ready (SV *self)
		1258	PROTOTYPE: $
		1259	CODE:
		1260	RETVAL = boolSV (api_is_ready (self));
		1261	OUTPUT:
		1262	RETVAL
1153		1263
1154	int	1264	int
1155	nready (...)	1265	nready (...)
1156	PROTOTYPE:	1266	PROTOTYPE:
1157	CODE:	1267	CODE:
1158	RETVAL = coro_nready;	1268	RETVAL = coro_nready;
1159	OUTPUT:	1269	OUTPUT:
1160	RETVAL	1270	RETVAL
1161		1271
1162	void	1272	MODULE = Coro::State PACKAGE = Coro::AIO
1163	schedule (...)	1273
1164	PROTOTYPE:	1274	SV *
		1275	_get_state ()
1165	CODE:	1276	CODE:
1166	api_schedule ();
1167
1168	void
1169	cede (...)
1170	PROTOTYPE:
1171	CODE:
1172	api_cede ();
1173
1174	# and these are hacks
1175	SV *
1176	_aio_get_state ()
1177	CODE:
1178	{	1277	{
1179	struct {	1278	struct io_state *data;
1180	int errorno;
1181	int laststype;
1182	int laststatval;
1183	Stat_t statcache;
1184	} data;
1185		1279
		1280	RETVAL = newSV (sizeof (struct io_state));
		1281	data = (struct io_state *)SvPVX (RETVAL);
		1282	SvCUR_set (RETVAL, sizeof (struct io_state));
		1283	SvPOK_only (RETVAL);
		1284
1186	data.errorno = errno;	1285	data->errorno = errno;
1187	data.laststype = PL_laststype;	1286	data->laststype = PL_laststype;
1188	data.laststatval = PL_laststatval;	1287	data->laststatval = PL_laststatval;
1189	data.statcache = PL_statcache;	1288	data->statcache = PL_statcache;
1190
1191	RETVAL = newSVpvn ((char *)&data, sizeof data);
1192	}	1289	}
1193	OUTPUT:	1290	OUTPUT:
1194	RETVAL	1291	RETVAL
1195		1292
1196	void	1293	void
1197	_aio_set_state (char *data_)	1294	_set_state (char *data_)
1198	PROTOTYPE: $	1295	PROTOTYPE: $
1199	CODE:	1296	CODE:
1200	{	1297	{
1201	struct {	1298	struct io_state *data = (void *)data_;
1202	int errorno;
1203	int laststype;
1204	int laststatval;
1205	Stat_t statcache;
1206	} *data = (void *)data_;
1207		1299
1208	errno = data->errorno;	1300	errno = data->errorno;
1209	PL_laststype = data->laststype;	1301	PL_laststype = data->laststype;
1210	PL_laststatval = data->laststatval;	1302	PL_laststatval = data->laststatval;
1211	PL_statcache = data->statcache;	1303	PL_statcache = data->statcache;
1212	}	1304	}
		1305

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