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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.80 by root, Thu Nov 2 20:00:00 2006 UTC vs.
Revision 1.122 by root, Mon Dec 4 13:47:56 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>
33		45
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	47	# undef STACKGUARD
36	#endif	48	#endif
…		…
53	# ifndef PAGESIZE	65	# ifndef PAGESIZE
54	# define PAGESIZE pagesize	66	# define PAGESIZE pagesize
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)	67	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;	68	static long pagesize;
57	# else	69	# else
58	# define BOOT_PAGESIZE	70	# define BOOT_PAGESIZE (void)0
59	# endif	71	# endif
		72	#else
		73	# define PAGESIZE 0
		74	# define BOOT_PAGESIZE (void)0
60	#endif	75	#endif
61
62	#define SUB_INIT "Coro::State::initialize"
63	#define UCORO_STATE "_coro_state"
64		76
65	/* The next macro should declare a variable stacklevel that contains and approximation	77	/* The next macro should declare a variable stacklevel that contains and approximation
66	* to the current C stack pointer. Its property is that it changes with each call	78	* to the current C stack pointer. Its property is that it changes with each call
67	* and should be unique. */	79	* and should be unique. */
		80	#define dSTACKLEVEL int stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	81	#define STACKLEVEL ((void *)&stacklevel)
69		82
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	83	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		84
72	#define labs(l) ((l) >= 0 ? (l) : -(l))	85	#if __GNUC__ >= 3
		86	# define attribute(x) __attribute__(x)
		87	#else
		88	# define attribute(x)
		89	#endif
		90
		91	#define NOINLINE attribute ((noinline))
73		92
74	#include "CoroAPI.h"	93	#include "CoroAPI.h"
75		94
76	#ifdef USE_ITHREADS	95	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	96	static perl_mutex coro_mutex;
…		…
80	#else	99	#else
81	# define LOCK (void)0	100	# define LOCK (void)0
82	# define UNLOCK (void)0	101	# define UNLOCK (void)0
83	#endif	102	#endif
84		103
		104	struct io_state
		105	{
		106	int errorno;
		107	I32 laststype;
		108	int laststatval;
		109	Stat_t statcache;
		110	};
		111
85	static struct CoroAPI coroapi;	112	static struct CoroAPI coroapi;
86	static AV *main_mainstack; /* used to differentiate between $main and others */	113	static AV *main_mainstack; /* used to differentiate between $main and others */
87	static HV *coro_state_stash;	114	static HV *coro_state_stash, *coro_stash;
88	static SV *ucoro_state_sv;
89	static U32 ucoro_state_hash;
90	static SV *coro_mortal; /* will be freed after next transfer */	115	static SV *coro_mortal; /* will be freed after next transfer */
91		116
92	/* this is actually not only the c stack but also c registers etc... */	117	static struct coro_cctx *cctx_first;
		118	static int cctx_count, cctx_idle;
		119
		120	/* this is a structure representing a c-level coroutine */
93	typedef struct {	121	typedef struct coro_cctx {
94	int refcnt; /* pointer reference counter */	122	struct coro_cctx *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		123
98	coro_context cctx;	124	/* the stack */
99
100	void *sptr;	125	void *sptr;
101	long ssize; /* positive == mmap, otherwise malloc */	126	long ssize; /* positive == mmap, otherwise malloc */
102	} coro_stack;
103		127
		128	/* cpu state */
		129	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		130	JMPENV *top_env;
		131	coro_context cctx;
		132
		133	int inuse;
		134
		135	#if USE_VALGRIND
		136	int valgrind_id;
		137	#endif
		138	} coro_cctx;
		139
		140	enum {
		141	CF_RUNNING = 0x0001, /* coroutine is running */
		142	CF_READY = 0x0002, /* coroutine is ready */
		143	CF_NEW = 0x0004, /* ahs never been switched to */
		144	};
		145
		146	/* this is a structure representing a perl-level coroutine */
104	struct coro {	147	struct coro {
105	/* the top-level JMPENV for each coroutine, needed to catch dies. */	148	/* the c coroutine allocated to this perl coroutine, if any */
106	JMPENV start_env;	149	coro_cctx *cctx;
107
108	/* the optional C context */
109	coro_stack *stack;
110	void *cursp;
111	int gencnt;
112
113	/* optionally saved, might be zero */
114	AV *defav;
115	SV *defsv;
116	SV *errsv;
117
118	/* saved global state not related to stacks */
119	U8 dowarn;
120	I32 in_eval;
121
122	/* the stacks and related info (callchain etc..) */
123	PERL_SI *curstackinfo;
124	AV *curstack;
125	AV *mainstack;
126	SV **stack_sp;
127	OP *op;
128	SV **curpad;
129	AV *comppad;
130	CV *compcv;
131	SV **stack_base;
132	SV **stack_max;
133	SV **tmps_stack;
134	I32 tmps_floor;
135	I32 tmps_ix;
136	I32 tmps_max;
137	I32 *markstack;
138	I32 *markstack_ptr;
139	I32 *markstack_max;
140	I32 *scopestack;
141	I32 scopestack_ix;
142	I32 scopestack_max;
143	ANY *savestack;
144	I32 savestack_ix;
145	I32 savestack_max;
146	OP **retstack;
147	I32 retstack_ix;
148	I32 retstack_max;
149	PMOP *curpm;
150	COP *curcop;
151	JMPENV *top_env;
152		150
153	/* data associated with this coroutine (initial args) */	151	/* data associated with this coroutine (initial args) */
154	AV *args;	152	AV *args;
		153	int refcnt;
		154	int save; /* CORO_SAVE flags */
		155	int flags; /* CF_ flags */
		156
		157	/* optionally saved, might be zero */
		158	AV *defav; /* @_ */
		159	SV *defsv; /* $_ */
		160	SV *errsv; /* $@ */
		161	SV *irssv; /* $/ */
		162
		163	#define VAR(name,type) type name;
		164	# include "state.h"
		165	#undef VAR
		166
		167	/* coro process data */
		168	int prio;
155	};	169	};
156		170
157	typedef struct coro *Coro__State;	171	typedef struct coro *Coro__State;
158	typedef struct coro *Coro__State_or_hashref;	172	typedef struct coro *Coro__State_or_hashref;
159		173
160	static AV *	174	static AV *
161	coro_clone_padlist (pTHX_ CV *cv)	175	coro_clone_padlist (CV *cv)
162	{	176	{
163	AV *padlist = CvPADLIST (cv);	177	AV *padlist = CvPADLIST (cv);
164	AV *newpadlist, *newpad;	178	AV *newpadlist, *newpad;
165		179
166	newpadlist = newAV ();	180	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	181	AvREAL_off (newpadlist);
168	#if PERL_VERSION < 9	182	#if PERL_VERSION_ATLEAST (5,9,0)
		183	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		184	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	185	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
170	#else
171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172	#endif	186	#endif
173	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	187	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
174	--AvFILLp (padlist);	188	--AvFILLp (padlist);
175		189
176	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	190	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
178		192
179	return newpadlist;	193	return newpadlist;
180	}	194	}
181		195
182	static void	196	static void
183	free_padlist (pTHX_ AV *padlist)	197	free_padlist (AV *padlist)
184	{	198	{
185	/* may be during global destruction */	199	/* may be during global destruction */
186	if (SvREFCNT (padlist))	200	if (SvREFCNT (padlist))
187	{	201	{
188	I32 i = AvFILLp (padlist);	202	I32 i = AvFILLp (padlist);
…		…
209	AV *padlist;	223	AV *padlist;
210	AV *av = (AV *)mg->mg_obj;	224	AV *av = (AV *)mg->mg_obj;
211		225
212	/* casting is fun. */	226	/* casting is fun. */
213	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	227	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
214	free_padlist (aTHX_ padlist);	228	free_padlist (padlist);
215		229
216	SvREFCNT_dec (av);	230	SvREFCNT_dec (av);
217		231
218	return 0;	232	return 0;
219	}	233	}
220		234
221	#define PERL_MAGIC_coro PERL_MAGIC_ext	235	#define PERL_MAGIC_coro PERL_MAGIC_ext
222		236
223	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	237	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
224		238
		239	#define CORO_MAGIC(cv) \
		240	SvMAGIC (cv) \
		241	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		242	? SvMAGIC (cv) \
		243	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		244	: 0
		245
225	/* the next two functions merely cache the padlists */	246	/* the next two functions merely cache the padlists */
226	static void	247	static void
227	get_padlist (pTHX_ CV *cv)	248	get_padlist (CV *cv)
228	{	249	{
229	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	250	MAGIC *mg = CORO_MAGIC (cv);
		251	AV *av;
230		252
231	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	253	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
232	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	254	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
233	else	255	else
234	{	256	{
235	#if 0	257	#if 0
236	/* this should work - but it doesn't :( */	258	/* this is probably cleaner, but also slower? */
237	CV *cp = Perl_cv_clone (aTHX_ cv);	259	CV *cp = Perl_cv_clone (cv);
238	CvPADLIST (cv) = CvPADLIST (cp);	260	CvPADLIST (cv) = CvPADLIST (cp);
239	CvPADLIST (cp) = 0;	261	CvPADLIST (cp) = 0;
240	SvREFCNT_dec (cp);	262	SvREFCNT_dec (cp);
241	#else	263	#else
242	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	264	CvPADLIST (cv) = coro_clone_padlist (cv);
243	#endif	265	#endif
244	}	266	}
245	}	267	}
246		268
247	static void	269	static void
248	put_padlist (pTHX_ CV *cv)	270	put_padlist (CV *cv)
249	{	271	{
250	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	272	MAGIC *mg = CORO_MAGIC (cv);
		273	AV *av;
251		274
252	if (!mg)	275	if (!mg)
253	{	276	{
254	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	277	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
255	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	278	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
256	mg->mg_virtual = &vtbl_coro;	279	mg->mg_virtual = &vtbl_coro;
257	mg->mg_obj = (SV *)newAV ();	280	mg->mg_obj = (SV *)newAV ();
258	}	281	}
259		282
260	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	283	av = (AV *)mg->mg_obj;
		284
		285	if (AvFILLp (av) >= AvMAX (av))
		286	av_extend (av, AvMAX (av) + 1);
		287
		288	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
261	}	289	}
262		290
263	#define SB do {	291	#define SB do {
264	#define SE } while (0)	292	#define SE } while (0)
265		293
266	#define LOAD(state) load_state(aTHX_ (state));
267	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
268
269	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	294	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
270		295
271	static void	296	static void
272	load_state(pTHX_ Coro__State c)	297	load_perl (Coro__State c)
273	{	298	{
274	PL_dowarn = c->dowarn;	299	#define VAR(name,type) PL_ ## name = c->name;
275	PL_in_eval = c->in_eval;	300	# include "state.h"
276		301	#undef VAR
277	PL_curstackinfo = c->curstackinfo;
278	PL_curstack = c->curstack;
279	PL_mainstack = c->mainstack;
280	PL_stack_sp = c->stack_sp;
281	PL_op = c->op;
282	PL_curpad = c->curpad;
283	PL_comppad = c->comppad;
284	PL_compcv = c->compcv;
285	PL_stack_base = c->stack_base;
286	PL_stack_max = c->stack_max;
287	PL_tmps_stack = c->tmps_stack;
288	PL_tmps_floor = c->tmps_floor;
289	PL_tmps_ix = c->tmps_ix;
290	PL_tmps_max = c->tmps_max;
291	PL_markstack = c->markstack;
292	PL_markstack_ptr = c->markstack_ptr;
293	PL_markstack_max = c->markstack_max;
294	PL_scopestack = c->scopestack;
295	PL_scopestack_ix = c->scopestack_ix;
296	PL_scopestack_max = c->scopestack_max;
297	PL_savestack = c->savestack;
298	PL_savestack_ix = c->savestack_ix;
299	PL_savestack_max = c->savestack_max;
300	#if PERL_VERSION < 9
301	PL_retstack = c->retstack;
302	PL_retstack_ix = c->retstack_ix;
303	PL_retstack_max = c->retstack_max;
304	#endif
305	PL_curpm = c->curpm;
306	PL_curcop = c->curcop;
307	PL_top_env = c->top_env;
308		302
309	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	303	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
310	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	304	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
311	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	305	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		306	if (c->irssv) REPLACE_SV (PL_rs , c->irssv);
312		307
313	{	308	{
314	dSP;	309	dSP;
315	CV *cv;	310	CV *cv;
316		311
317	/* now do the ugly restore mess */	312	/* now do the ugly restore mess */
318	while ((cv = (CV *)POPs))	313	while ((cv = (CV *)POPs))
319	{	314	{
320	AV *padlist = (AV *)POPs;
321
322	if (padlist)
323	{
324	put_padlist (aTHX_ cv); /* mark this padlist as available */	315	put_padlist (cv); /* mark this padlist as available */
325	CvPADLIST(cv) = padlist;	316	CvDEPTH (cv) = PTR2IV (POPs);
326	}	317	CvPADLIST (cv) = (AV *)POPs;
327
328	++CvDEPTH(cv);
329	}	318	}
330		319
331	PUTBACK;	320	PUTBACK;
332	}	321	}
333	}	322	}
334		323
335	static void	324	static void
336	save_state(pTHX_ Coro__State c, int flags)	325	save_perl (Coro__State c)
337	{	326	{
338	{	327	{
339	dSP;	328	dSP;
340	I32 cxix = cxstack_ix;	329	I32 cxix = cxstack_ix;
341	PERL_CONTEXT *ccstk = cxstack;	330	PERL_CONTEXT *ccstk = cxstack;
…		…
352	{	341	{
353	while (cxix >= 0)	342	while (cxix >= 0)
354	{	343	{
355	PERL_CONTEXT *cx = &ccstk[cxix--];	344	PERL_CONTEXT *cx = &ccstk[cxix--];
356		345
357	if (CxTYPE(cx) == CXt_SUB)	346	if (CxTYPE (cx) == CXt_SUB)
358	{	347	{
359	CV *cv = cx->blk_sub.cv;	348	CV *cv = cx->blk_sub.cv;
		349
360	if (CvDEPTH(cv))	350	if (CvDEPTH (cv))
361	{	351	{
362	EXTEND (SP, CvDEPTH(cv)*2);	352	EXTEND (SP, 3);
363		353
364	while (--CvDEPTH(cv))
365	{
366	/* this tells the restore code to increment CvDEPTH */
367	PUSHs (Nullsv);
368	PUSHs ((SV *)cv);
369	}
370
371	PUSHs ((SV *)CvPADLIST(cv));	354	PUSHs ((SV *)CvPADLIST (cv));
		355	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
372	PUSHs ((SV *)cv);	356	PUSHs ((SV *)cv);
373		357
		358	CvDEPTH (cv) = 0;
374	get_padlist (aTHX_ cv);	359	get_padlist (cv);
375	}	360	}
376	}	361	}
377	#ifdef CXt_FORMAT	362	#ifdef CXt_FORMAT
378	else if (CxTYPE(cx) == CXt_FORMAT)	363	else if (CxTYPE (cx) == CXt_FORMAT)
379	{	364	{
380	/* I never used formats, so how should I know how these are implemented? */	365	/* I never used formats, so how should I know how these are implemented? */
381	/* my bold guess is as a simple, plain sub... */	366	/* my bold guess is as a simple, plain sub... */
382	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	367	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383	}	368	}
…		…
393	}	378	}
394		379
395	PUTBACK;	380	PUTBACK;
396	}	381	}
397		382
398	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	383	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
399	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	384	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
400	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	385	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		386	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
401		387
402	c->dowarn = PL_dowarn;	388	#define VAR(name,type)c->name = PL_ ## name;
403	c->in_eval = PL_in_eval;	389	# include "state.h"
404		390	#undef VAR
405	c->curstackinfo = PL_curstackinfo;
406	c->curstack = PL_curstack;
407	c->mainstack = PL_mainstack;
408	c->stack_sp = PL_stack_sp;
409	c->op = PL_op;
410	c->curpad = PL_curpad;
411	c->comppad = PL_comppad;
412	c->compcv = PL_compcv;
413	c->stack_base = PL_stack_base;
414	c->stack_max = PL_stack_max;
415	c->tmps_stack = PL_tmps_stack;
416	c->tmps_floor = PL_tmps_floor;
417	c->tmps_ix = PL_tmps_ix;
418	c->tmps_max = PL_tmps_max;
419	c->markstack = PL_markstack;
420	c->markstack_ptr = PL_markstack_ptr;
421	c->markstack_max = PL_markstack_max;
422	c->scopestack = PL_scopestack;
423	c->scopestack_ix = PL_scopestack_ix;
424	c->scopestack_max = PL_scopestack_max;
425	c->savestack = PL_savestack;
426	c->savestack_ix = PL_savestack_ix;
427	c->savestack_max = PL_savestack_max;
428	#if PERL_VERSION < 9
429	c->retstack = PL_retstack;
430	c->retstack_ix = PL_retstack_ix;
431	c->retstack_max = PL_retstack_max;
432	#endif
433	c->curpm = PL_curpm;
434	c->curcop = PL_curcop;
435	c->top_env = PL_top_env;
436	}	391	}
437		392
438	/*	393	/*
439	* allocate various perl stacks. This is an exact copy	394	* allocate various perl stacks. This is an exact copy
440	* of perl.c:init_stacks, except that it uses less memory	395	* of perl.c:init_stacks, except that it uses less memory
441	* on the (sometimes correct) assumption that coroutines do	396	* on the (sometimes correct) assumption that coroutines do
442	* not usually need a lot of stackspace.	397	* not usually need a lot of stackspace.
443	*/	398	*/
444	static void	399	static void
445	coro_init_stacks (pTHX)	400	coro_init_stacks ()
446	{	401	{
447	LOCK;
448
449	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	402	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
450	PL_curstackinfo->si_type = PERLSI_MAIN;	403	PL_curstackinfo->si_type = PERLSI_MAIN;
451	PL_curstack = PL_curstackinfo->si_stack;	404	PL_curstack = PL_curstackinfo->si_stack;
452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	405	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453		406
454	PL_stack_base = AvARRAY(PL_curstack);	407	PL_stack_base = AvARRAY(PL_curstack);
455	PL_stack_sp = PL_stack_base;	408	PL_stack_sp = PL_stack_base;
456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	409	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457		410
458	New(50,PL_tmps_stack,96,SV*);	411	New(50,PL_tmps_stack,128,SV*);
459	PL_tmps_floor = -1;	412	PL_tmps_floor = -1;
460	PL_tmps_ix = -1;	413	PL_tmps_ix = -1;
461	PL_tmps_max = 96;	414	PL_tmps_max = 128;
462		415
463	New(54,PL_markstack,16,I32);	416	New(54,PL_markstack,32,I32);
464	PL_markstack_ptr = PL_markstack;	417	PL_markstack_ptr = PL_markstack;
465	PL_markstack_max = PL_markstack + 16;	418	PL_markstack_max = PL_markstack + 32;
466		419
467	#ifdef SET_MARK_OFFSET	420	#ifdef SET_MARK_OFFSET
468	SET_MARK_OFFSET;	421	SET_MARK_OFFSET;
469	#endif	422	#endif
470		423
471	New(54,PL_scopestack,16,I32);	424	New(54,PL_scopestack,32,I32);
472	PL_scopestack_ix = 0;	425	PL_scopestack_ix = 0;
473	PL_scopestack_max = 16;	426	PL_scopestack_max = 32;
474		427
475	New(54,PL_savestack,96,ANY);	428	New(54,PL_savestack,64,ANY);
476	PL_savestack_ix = 0;	429	PL_savestack_ix = 0;
477	PL_savestack_max = 96;	430	PL_savestack_max = 64;
478		431
479	#if PERL_VERSION < 9	432	#if !PERL_VERSION_ATLEAST (5,9,0)
480	New(54,PL_retstack,8,OP*);	433	New(54,PL_retstack,16,OP*);
481	PL_retstack_ix = 0;	434	PL_retstack_ix = 0;
482	PL_retstack_max = 8;	435	PL_retstack_max = 16;
483	#endif	436	#endif
484
485	UNLOCK;
486	}	437	}
487		438
488	/*	439	/*
489	* destroy the stacks, the callchain etc...	440	* destroy the stacks, the callchain etc...
490	*/	441	*/
491	static void	442	static void
492	destroy_stacks(pTHX)	443	coro_destroy_stacks ()
493	{	444	{
494	if (!IN_DESTRUCT)	445	if (!IN_DESTRUCT)
495	{	446	{
496	/* is this ugly, I ask? */	447	/* is this ugly, I ask? */
497	LEAVE_SCOPE (0);	448	LEAVE_SCOPE (0);
…		…
528		479
529	Safefree (PL_tmps_stack);	480	Safefree (PL_tmps_stack);
530	Safefree (PL_markstack);	481	Safefree (PL_markstack);
531	Safefree (PL_scopestack);	482	Safefree (PL_scopestack);
532	Safefree (PL_savestack);	483	Safefree (PL_savestack);
533	#if PERL_VERSION < 9	484	#if !PERL_VERSION_ATLEAST (5,9,0)
534	Safefree (PL_retstack);	485	Safefree (PL_retstack);
535	#endif	486	#endif
536	}	487	}
537		488
538	static void	489	static void
539	allocate_stack (Coro__State ctx, int alloc)	490	setup_coro (struct coro *coro)
540	{
541	coro_stack *stack;
542
543	New (0, stack, 1, coro_stack);
544
545	stack->refcnt = 1;
546	stack->usecnt = 1;
547	stack->gencnt = ctx->gencnt = 0;
548
549	if (alloc)
550	{
551	#if HAVE_MMAP
552	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
553	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
554	if (stack->sptr != (void *)-1)
555	{
556	# if STACKGUARD
557	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
558	# endif
559	}
560	else
561	#endif
562	{
563	stack->ssize = - (STACKSIZE * (long)sizeof (long));
564	New (0, stack->sptr, STACKSIZE, long);
565	}
566	}
567	else
568	stack->sptr = 0;
569
570	ctx->stack = stack;
571	}
572
573	static void
574	deallocate_stack (Coro__State ctx)
575	{
576	coro_stack *stack = ctx->stack;
577
578	ctx->stack = 0;
579
580	if (stack)
581	{
582	if (!--stack->refcnt)
583	{
584	#ifdef HAVE_MMAP
585	if (stack->ssize > 0 && stack->sptr)
586	munmap (stack->sptr, stack->ssize);
587	else
588	#endif
589	Safefree (stack->sptr);
590
591	Safefree (stack);
592	}
593	else if (ctx->gencnt == stack->gencnt)
594	--stack->usecnt;
595	}
596	}
597
598	static void
599	setup_coro (void *arg)
600	{	491	{
601	/*	492	/*
602	* emulate part of the perl startup here.	493	* emulate part of the perl startup here.
603	*/	494	*/
604	dTHX;
605	dSP;
606	Coro__State ctx = (Coro__State)arg;
607	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
608		495
609	coro_init_stacks (aTHX);	496	coro_init_stacks ();
610	/*PL_curcop = 0;*/	497
611	/*PL_in_eval = PL_in_eval;*/ /* inherit */	498	PL_curcop = &PL_compiling;
		499	PL_in_eval = EVAL_NULL;
		500	PL_curpm = 0;
		501	PL_localizing = 0;
		502	PL_dirty = 0;
		503	PL_restartop = 0;
		504
		505	{
		506	dSP;
		507	LOGOP myop;
		508
612	SvREFCNT_dec (GvAV (PL_defgv));	509	SvREFCNT_dec (GvAV (PL_defgv));
613	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	510	GvAV (PL_defgv) = coro->args; coro->args = 0;
614		511
615	SPAGAIN;
616
617	if (ctx->stack)
618	{
619	ctx->cursp = 0;
620
621	PUSHMARK(SP);
622	PUTBACK;
623	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
624
625	if (SvTRUE (ERRSV))
626	croak (NULL);
627	else
628	croak ("FATAL: CCTXT coroutine returned!");
629	}
630	else
631	{
632	UNOP myop;
633
634	Zero(&myop, 1, UNOP);	512	Zero (&myop, 1, LOGOP);
635	myop.op_next = Nullop;	513	myop.op_next = Nullop;
636	myop.op_flags = OPf_WANT_VOID;	514	myop.op_flags = OPf_WANT_VOID;
637		515
		516	PUSHMARK (SP);
		517	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		518	PUTBACK;
638	PL_op = (OP *)&myop;	519	PL_op = (OP *)&myop;
639
640	PUSHMARK(SP);
641	XPUSHs (sub_init);
642	/*
643	* the next line is slightly wrong, as PL_op->op_next
644	* is actually being executed so we skip the first op.
645	* that doesn't matter, though, since it is only
646	* pp_nextstate and we never return...
647	* ah yes, and I don't care anyways ;)
648	*/
649	PUTBACK;
650	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	520	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
651	SPAGAIN;	521	SPAGAIN;
		522	}
652		523
653	ENTER; /* necessary e.g. for dounwind */	524	ENTER; /* necessary e.g. for dounwind */
654	}
655	}	525	}
656		526
657	static void	527	static void
658	continue_coro (void *arg)	528	free_coro_mortal ()
659	{	529	{
660	/*
661	* this is a _very_ stripped down perl interpreter ;)
662	*/
663	dTHX;
664	Coro__State ctx = (Coro__State)arg;
665
666	PL_top_env = &ctx->start_env;
667
668	ctx->cursp = 0;
669	PL_op = PL_op->op_next;
670	CALLRUNOPS(aTHX);
671
672	abort ();
673	}
674
675	static void
676	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
677	{
678	dSTACKLEVEL;
679
680	if (prev != next)
681	{
682	if (next->mainstack)
683	{
684	LOCK;
685	SAVE (prev, flags);
686	LOAD (next);
687	UNLOCK;
688
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	}
722	else if (next->tmps_ix == -2)
723	croak ("tried to transfer to running coroutine");
724	else
725	{
726	LOCK;
727	SAVE (prev, -1); /* first get rid of the old state */
728	UNLOCK;
729
730	if (flags & TRANSFER_SAVE_CCTXT)
731	{
732	if (!prev->stack)
733	allocate_stack (prev, 0);
734
735	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
736	{
737	PL_top_env = &next->start_env;
738
739	setup_coro (next);
740	next->cursp = stacklevel;
741
742	prev->stack->refcnt++;
743	prev->stack->usecnt++;
744	next->stack = prev->stack;
745	next->gencnt = prev->gencnt;
746	}
747	else
748	{
749	assert (!next->stack);
750	allocate_stack (next, 1);
751	coro_create (&(next->stack->cctx),
752	setup_coro, (void *)next,
753	next->stack->sptr, labs (next->stack->ssize));
754	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755	prev->cursp = stacklevel;
756	/* don't add any code here */
757	}
758	}
759	else
760	{
761	setup_coro (next);
762	next->cursp = stacklevel;
763	}
764	}
765	}
766
767	LOCK;
768	if (coro_mortal)	530	if (coro_mortal)
769	{	531	{
770	SvREFCNT_dec (coro_mortal);	532	SvREFCNT_dec (coro_mortal);
771	coro_mortal = 0;	533	coro_mortal = 0;
772	}	534	}
		535	}
		536
		537	/* inject a fake call to Coro::State::_cctx_init into the execution */
		538	static void NOINLINE
		539	prepare_cctx (coro_cctx *cctx)
		540	{
		541	dSP;
		542	LOGOP myop;
		543
		544	Zero (&myop, 1, LOGOP);
		545	myop.op_next = PL_op;
		546	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		547
		548	PUSHMARK (SP);
		549	EXTEND (SP, 2);
		550	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		551	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		552	PUTBACK;
		553	PL_op = (OP *)&myop;
		554	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		555	SPAGAIN;
		556	}
		557
		558	static void
		559	coro_run (void *arg)
		560	{
		561	/* coro_run is the alternative tail of transfer(), so unlock here. */
773	UNLOCK;	562	UNLOCK;
774	}
775		563
776	#define SV_CORO(sv,func) \	564	/*
777	do { \	565	* this is a _very_ stripped down perl interpreter ;)
778	if (SvROK (sv)) \	566	*/
779	sv = SvRV (sv); \	567	PL_top_env = &PL_start_env;
780	\
781	if (SvTYPE (sv) == SVt_PVHV) \
782	{ \
783	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
784	\
785	if (!he) \
786	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787	\
788	(sv) = SvRV (HeVAL(he)); \
789	} \
790	\
791	/* must also be changed inside Coro::Cont::yield */ \
792	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
793	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794	\
795	} while(0)
796		568
797	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	569	/* inject call to cctx_init */
		570	prepare_cctx ((coro_cctx *)arg);
798		571
		572	/* somebody will hit me for both perl_run and PL_restartop */
		573	PL_restartop = PL_op;
		574	perl_run (PL_curinterp);
		575
		576	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		577	abort ();
		578	}
		579
		580	static coro_cctx *
		581	cctx_new ()
		582	{
		583	coro_cctx *cctx;
		584
		585	++cctx_count;
		586
		587	New (0, cctx, 1, coro_cctx);
		588
		589	#if HAVE_MMAP
		590
		591	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		592	/* mmap supposedly does allocate-on-write for us */
		593	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		594
		595	if (cctx->sptr == (void *)-1)
		596	{
		597	perror ("FATAL: unable to mmap stack for coroutine");
		598	_exit (EXIT_FAILURE);
		599	}
		600
		601	# if STACKGUARD
		602	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		603	# endif
		604
		605	#else
		606
		607	cctx->ssize = STACKSIZE * (long)sizeof (long);
		608	New (0, cctx->sptr, STACKSIZE, long);
		609
		610	if (!cctx->sptr)
		611	{
		612	perror ("FATAL: unable to malloc stack for coroutine");
		613	_exit (EXIT_FAILURE);
		614	}
		615
		616	#endif
		617
		618	#if USE_VALGRIND
		619	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		620	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		621	cctx->ssize + (char *)cctx->sptr
		622	);
		623	#endif
		624
		625	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		626
		627	return cctx;
		628	}
		629
		630	static void
		631	cctx_destroy (coro_cctx *cctx)
		632	{
		633	if (!cctx)
		634	return;
		635
		636	--cctx_count;
		637
		638	#if USE_VALGRIND
		639	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		640	#endif
		641
		642	#if HAVE_MMAP
		643	munmap (cctx->sptr, cctx->ssize);
		644	#else
		645	Safefree (cctx->sptr);
		646	#endif
		647
		648	Safefree (cctx);
		649	}
		650
		651	static coro_cctx *
		652	cctx_get ()
		653	{
		654	coro_cctx *cctx;
		655
		656	if (cctx_first)
		657	{
		658	cctx = cctx_first;
		659	cctx_first = cctx->next;
		660	--cctx_idle;
		661	}
		662	else
		663	{
		664	cctx = cctx_new ();
		665	PL_op = PL_op->op_next;
		666	}
		667
		668	return cctx;
		669	}
		670
		671	static void
		672	cctx_put (coro_cctx *cctx)
		673	{
		674	/* free another cctx if overlimit */
		675	if (cctx_idle >= MAX_IDLE_CCTX)
		676	{
		677	coro_cctx *first = cctx_first;
		678	cctx_first = first->next;
		679	--cctx_idle;
		680
		681	assert (!first->inuse);
		682	cctx_destroy (first);
		683	}
		684
		685	++cctx_idle;
		686	cctx->next = cctx_first;
		687	cctx_first = cctx;
		688	}
		689
		690	/* never call directly, always through the coro_state_transfer global variable */
		691	static void NOINLINE
		692	transfer (struct coro *prev, struct coro *next)
		693	{
		694	dSTACKLEVEL;
		695
		696	/* sometimes transfer is only called to set idle_sp */
		697	if (!next)
		698	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		699	else if (prev != next)
		700	{
		701	coro_cctx *prev__cctx;
		702
		703	if (prev->flags & CF_NEW)
		704	{
		705	/* create a new empty context */
		706	Newz (0, prev->cctx, 1, coro_cctx);
		707	prev->cctx->inuse = 1;
		708	prev->flags &= ~CF_NEW;
		709	prev->flags |= CF_RUNNING;
		710	}
		711
		712	/*TODO: must not croak here */
		713	if (!prev->flags & CF_RUNNING)
		714	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		715
		716	if (next->flags & CF_RUNNING)
		717	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		718
		719	prev->flags &= ~CF_RUNNING;
		720	next->flags |= CF_RUNNING;
		721
		722	LOCK;
		723
		724	if (next->flags & CF_NEW)
		725	{
		726	/* need to start coroutine */
		727	next->flags &= ~CF_NEW;
		728	/* first get rid of the old state */
		729	save_perl (prev);
		730	/* setup coroutine call */
		731	setup_coro (next);
		732	/* need a new stack */
		733	assert (!next->stack);
		734	}
		735	else
		736	{
		737	/* coroutine already started */
		738	save_perl (prev);
		739	load_perl (next);
		740	}
		741
		742	prev__cctx = prev->cctx;
		743
		744	/* possibly "free" the cctx */
		745	if (prev__cctx->idle_sp == STACKLEVEL)
		746	{
		747	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		748	assert (PL_top_env == prev__cctx->top_env);
		749
		750	prev->cctx = 0;
		751
		752	cctx_put (prev__cctx);
		753	prev__cctx->inuse = 0;
		754	}
		755
		756	if (!next->cctx)
		757	{
		758	next->cctx = cctx_get ();
		759	assert (!next->cctx->inuse);
		760	next->cctx->inuse = 1;
		761	}
		762
		763	if (prev__cctx != next->cctx)
		764	{
		765	prev__cctx->top_env = PL_top_env;
		766	PL_top_env = next->cctx->top_env;
		767	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		768	}
		769
		770	free_coro_mortal ();
		771
		772	UNLOCK;
		773	}
		774	}
		775
		776	struct transfer_args
		777	{
		778	struct coro *prev, *next;
		779	};
		780
		781	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
		782
		783	static void
		784	coro_state_destroy (struct coro *coro)
		785	{
		786	if (coro->refcnt--)
		787	return;
		788
		789	if (coro->mainstack && coro->mainstack != main_mainstack)
		790	{
		791	struct coro temp;
		792	Zero (&temp, 1, struct coro);
		793	temp.save = CORO_SAVE_ALL;
		794
		795	if (coro->flags & CF_RUNNING)
		796	croak ("FATAL: tried to destroy currently running coroutine");
		797
		798	save_perl (&temp);
		799	load_perl (coro);
		800
		801	coro_destroy_stacks ();
		802
		803	load_perl (&temp); /* this will get rid of defsv etc.. */
		804
		805	coro->mainstack = 0;
		806	}
		807
		808	cctx_destroy (coro->cctx);
		809	SvREFCNT_dec (coro->args);
		810	Safefree (coro);
		811	}
		812
799	static void	813	static int
		814	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		815	{
		816	struct coro *coro = (struct coro *)mg->mg_ptr;
		817	mg->mg_ptr = 0;
		818
		819	coro_state_destroy (coro);
		820
		821	return 0;
		822	}
		823
		824	static int
		825	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		826	{
		827	struct coro *coro = (struct coro *)mg->mg_ptr;
		828
		829	++coro->refcnt;
		830
		831	return 0;
		832	}
		833
		834	static MGVTBL coro_state_vtbl = {
		835	0, 0, 0, 0,
		836	coro_state_clear,
		837	0,
		838	#ifdef MGf_DUP
		839	coro_state_dup,
		840	#else
		841	# define MGf_DUP 0
		842	#endif
		843	};
		844
		845	static struct coro *
		846	SvSTATE (SV *coro)
		847	{
		848	HV *stash;
		849	MAGIC *mg;
		850
		851	if (SvROK (coro))
		852	coro = SvRV (coro);
		853
		854	stash = SvSTASH (coro);
		855	if (stash != coro_stash && stash != coro_state_stash)
		856	{
		857	/* very slow, but rare, check */
		858	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		859	croak ("Coro::State object required");
		860	}
		861
		862	mg = SvMAGIC (coro);
		863	assert (mg->mg_type == PERL_MAGIC_ext);
		864	return (struct coro *)mg->mg_ptr;
		865	}
		866
		867	static void
		868	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		869	{
		870	ta->prev = SvSTATE (prev_sv);
		871	ta->next = SvSTATE (next_sv);
		872	}
		873
		874	static void
800	api_transfer(pTHX_ SV *prev, SV *next, int flags)	875	api_transfer (SV *prev_sv, SV *next_sv)
801	{	876	{
802	SV_CORO (prev, "Coro::transfer");	877	struct transfer_args ta;
803	SV_CORO (next, "Coro::transfer");
804		878
805	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	879	prepare_transfer (&ta, prev_sv, next_sv);
		880	TRANSFER (ta);
		881	}
		882
		883	static int
		884	api_save (SV *coro_sv, int new_save)
		885	{
		886	struct coro *coro = SvSTATE (coro_sv);
		887	int old_save = coro->save;
		888
		889	if (new_save >= 0)
		890	coro->save = new_save;
		891
		892	return old_save;
806	}	893	}
807		894
808	/** Coro ********************************************************************/	895	/** Coro ********************************************************************/
809		896
810	#define PRIO_MAX 3	897	#define PRIO_MAX 3
…		…
813	#define PRIO_LOW -1	900	#define PRIO_LOW -1
814	#define PRIO_IDLE -3	901	#define PRIO_IDLE -3
815	#define PRIO_MIN -4	902	#define PRIO_MIN -4
816		903
817	/* for Coro.pm */	904	/* for Coro.pm */
818	static GV *coro_current, *coro_idle;	905	static SV *coro_current;
819	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	906	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
820	static int coro_nready;	907	static int coro_nready;
821		908
822	static void	909	static void
823	coro_enq (pTHX_ SV *sv)	910	coro_enq (SV *coro_sv)
824	{	911	{
825	SV **xprio;
826	int prio;
827
828	if (SvTYPE (sv) != SVt_PVHV)
829	croak ("Coro::ready tried to enqueue something that is not a coroutine");
830
831	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
832	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
833
834	prio = prio > PRIO_MAX ? PRIO_MAX
835	: prio < PRIO_MIN ? PRIO_MIN
836	: prio;
837
838	av_push (coro_ready [prio - PRIO_MIN], sv);	912	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
839	coro_nready++;	913	coro_nready++;
840	}	914	}
841		915
842	static SV *	916	static SV *
843	coro_deq (pTHX_ int min_prio)	917	coro_deq (int min_prio)
844	{	918	{
845	int prio = PRIO_MAX - PRIO_MIN;	919	int prio = PRIO_MAX - PRIO_MIN;
846		920
847	min_prio -= PRIO_MIN;	921	min_prio -= PRIO_MIN;
848	if (min_prio < 0)	922	if (min_prio < 0)
849	min_prio = 0;	923	min_prio = 0;
850		924
851	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	925	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852	if (av_len (coro_ready[prio]) >= 0)	926	if (AvFILLp (coro_ready [prio]) >= 0)
853	{	927	{
854	coro_nready--;	928	coro_nready--;
855	return av_shift (coro_ready[prio]);	929	return av_shift (coro_ready [prio]);
856	}	930	}
857		931
858	return 0;	932	return 0;
859	}	933	}
860		934
861	static void	935	static int
862	api_ready (SV *coro)	936	api_ready (SV *coro_sv)
863	{	937	{
864	dTHX;	938	struct coro *coro;
865		939
866	if (SvROK (coro))	940	if (SvROK (coro_sv))
867	coro = SvRV (coro);	941	coro_sv = SvRV (coro_sv);
		942
		943	coro = SvSTATE (coro_sv);
		944
		945	if (coro->flags & CF_READY)
		946	return 0;
		947
		948	#if 0 /* this is actually harmless */
		949	if (coro->flags & CF_RUNNING)
		950	croak ("Coro::ready called on currently running coroutine");
		951	#endif
		952
		953	coro->flags |= CF_READY;
868		954
869	LOCK;	955	LOCK;
870	coro_enq (aTHX_ SvREFCNT_inc (coro));	956	coro_enq (SvREFCNT_inc (coro_sv));
871	UNLOCK;	957	UNLOCK;
		958
		959	return 1;
		960	}
		961
		962	static int
		963	api_is_ready (SV *coro_sv)
		964	{
		965	return !!SvSTATE (coro_sv)->flags & CF_READY;
		966	}
		967
		968	static void
		969	prepare_schedule (struct transfer_args *ta)
		970	{
		971	SV *prev, *next;
		972
		973	for (;;)
		974	{
		975	LOCK;
		976	next = coro_deq (PRIO_MIN);
		977	UNLOCK;
		978
		979	if (next)
		980	break;
		981
		982	{
		983	dSP;
		984
		985	ENTER;
		986	SAVETMPS;
		987
		988	PUSHMARK (SP);
		989	PUTBACK;
		990	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		991
		992	FREETMPS;
		993	LEAVE;
		994	}
		995	}
		996
		997	prev = SvRV (coro_current);
		998	SvRV_set (coro_current, next);
		999
		1000	/* free this only after the transfer */
		1001	LOCK;
		1002	free_coro_mortal ();
		1003	UNLOCK;
		1004	coro_mortal = prev;
		1005
		1006	assert (!SvROK(prev));//D
		1007	assert (!SvROK(next));//D
		1008
		1009	ta->prev = SvSTATE (prev);
		1010	ta->next = SvSTATE (next);
		1011
		1012	assert (ta->next->flags & CF_READY);
		1013	ta->next->flags &= ~CF_READY;
		1014	}
		1015
		1016	static void
		1017	prepare_cede (struct transfer_args *ta)
		1018	{
		1019	api_ready (coro_current);
		1020
		1021	prepare_schedule (ta);
872	}	1022	}
873		1023
874	static void	1024	static void
875	api_schedule (void)	1025	api_schedule (void)
876	{	1026	{
877	dTHX;	1027	struct transfer_args ta;
878		1028
879	SV *prev, *next;	1029	prepare_schedule (&ta);
880		1030	TRANSFER (ta);
881	LOCK;
882
883	prev = SvRV (GvSV (coro_current));
884	next = coro_deq (aTHX_ PRIO_MIN);
885
886	if (!next)
887	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
888
889	/* free this only after the transfer */
890	coro_mortal = prev;
891	SV_CORO (prev, "Coro::schedule");
892
893	SvRV (GvSV (coro_current)) = next;
894
895	SV_CORO (next, "Coro::schedule");
896
897	UNLOCK;
898
899	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
900	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
901	}	1031	}
902		1032
903	static void	1033	static void
904	api_cede (void)	1034	api_cede (void)
905	{	1035	{
906	dTHX;	1036	struct transfer_args ta;
907		1037
908	LOCK;	1038	prepare_cede (&ta);
909	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1039	TRANSFER (ta);
910	UNLOCK;
911
912	api_schedule ();
913	}	1040	}
914		1041
915	MODULE = Coro::State PACKAGE = Coro::State	1042	MODULE = Coro::State PACKAGE = Coro::State
916		1043
917	PROTOTYPES: ENABLE	1044	PROTOTYPES: DISABLE
918		1045
919	BOOT:	1046	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1047	{
921	#ifdef USE_ITHREADS	1048	#ifdef USE_ITHREADS
922	MUTEX_INIT (&coro_mutex);	1049	MUTEX_INIT (&coro_mutex);
923	#endif	1050	#endif
924	BOOT_PAGESIZE;	1051	BOOT_PAGESIZE;
925		1052
926	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
927	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
928	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1053	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929		1054
930	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1055	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
931	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1056	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
932	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1057	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1058	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
933	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1059	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
934		1060
935	main_mainstack = PL_mainstack;	1061	main_mainstack = PL_mainstack;
936		1062
937	coroapi.ver = CORO_API_VERSION;	1063	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1064	coroapi.transfer = api_transfer;
939	}
940		1065
941	Coro::State	1066	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1067	}
943	SV * args	1068
944	PROTOTYPE: $	1069	SV *
		1070	new (char *klass, ...)
945	CODE:	1071	CODE:
946	Coro__State coro;	1072	{
		1073	struct coro *coro;
		1074	HV *hv;
		1075	int i;
947		1076
948	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
949	croak ("Coro::State::_newprocess expects an arrayref");
950
951	Newz (0, coro, 1, struct coro);	1077	Newz (0, coro, 1, struct coro);
		1078	coro->args = newAV ();
		1079	coro->save = CORO_SAVE_ALL;
		1080	coro->flags = CF_NEW;
952		1081
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1082	hv = newHV ();
954	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1083	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
955	/*coro->stack = 0;*/	1084	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
956		1085
957	/* same as JMPENV_BOOTSTRAP */	1086	for (i = 1; i < items; i++)
958	/* we might be able to recycle start_env, but safe is safe */	1087	av_push (coro->args, newSVsv (ST (i)));
959	/*Zero (&coro->start_env, 1, JMPENV);*/	1088	}
960	coro->start_env.je_ret = -1;
961	coro->start_env.je_mustcatch = TRUE;
962
963	RETVAL = coro;
964	OUTPUT:	1089	OUTPUT:
965	RETVAL	1090	RETVAL
966		1091
		1092	int
		1093	save (SV *coro, int new_save = -1)
		1094	CODE:
		1095	RETVAL = api_save (coro, new_save);
		1096	OUTPUT:
		1097	RETVAL
		1098
967	void	1099	void
968	transfer(prev, next, flags)	1100	_set_stacklevel (...)
969	SV *prev	1101	ALIAS:
970	SV *next	1102	Coro::State::transfer = 1
971	int flags	1103	Coro::schedule = 2
972	PROTOTYPE: @	1104	Coro::cede = 3
973	CODE:	1105	CODE:
974	PUTBACK;	1106	{
975	SV_CORO (next, "Coro::transfer");	1107	struct transfer_args ta;
976	SV_CORO (prev, "Coro::transfer");	1108
977	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1109	switch (ix)
978	SPAGAIN;	1110	{
		1111	case 0:
		1112	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1113	ta.next = 0;
		1114	break;
		1115
		1116	case 1:
		1117	if (items != 2)
		1118	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1119
		1120	prepare_transfer (&ta, ST (0), ST (1));
		1121	break;
		1122
		1123	case 2:
		1124	prepare_schedule (&ta);
		1125	break;
		1126
		1127	case 3:
		1128	prepare_cede (&ta);
		1129	break;
		1130	}
		1131
		1132	TRANSFER (ta);
		1133	}
979		1134
980	void	1135	void
981	DESTROY(coro)	1136	_clone_state_from (SV *dst, SV *src)
982	Coro::State coro	1137	CODE:
983	CODE:	1138	{
		1139	struct coro *coro_src = SvSTATE (src);
984		1140
985	if (coro->mainstack && coro->mainstack != main_mainstack)	1141	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
986	{
987	struct coro temp;
988		1142
989	PUTBACK;	1143	++coro_src->refcnt;
990	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1144	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
991	LOAD (aTHX_ coro);	1145	}
992	SPAGAIN;
993
994	destroy_stacks (aTHX);
995
996	LOAD ((&temp)); /* this will get rid of defsv etc.. */
997	SPAGAIN;
998
999	coro->mainstack = 0;
1000	}
1001
1002	deallocate_stack (coro);
1003	SvREFCNT_dec (coro->args);
1004	Safefree (coro);
1005		1146
1006	void	1147	void
1007	_exit(code)	1148	_exit (code)
1008	int code	1149	int code
1009	PROTOTYPE: $	1150	PROTOTYPE: $
1010	CODE:	1151	CODE:
1011	_exit (code);	1152	_exit (code);
1012		1153
1013	MODULE = Coro::State PACKAGE = Coro::Cont	1154	int
		1155	cctx_count ()
		1156	CODE:
		1157	RETVAL = cctx_count;
		1158	OUTPUT:
		1159	RETVAL
1014		1160
1015	# this is slightly dirty (should expose a c-level api)	1161	int
1016		1162	cctx_idle ()
1017	void	1163	CODE:
1018	yield(...)	1164	RETVAL = cctx_idle;
1019	PROTOTYPE: @	1165	OUTPUT:
1020	CODE:	1166	RETVAL
1021	SV *yieldstack;
1022	SV *sv;
1023	AV *defav = GvAV (PL_defgv);
1024	struct coro *prev, *next;
1025
1026	yieldstack = *hv_fetch (
1027	(HV *)SvRV (GvSV (coro_current)),
1028	"yieldstack", sizeof ("yieldstack") - 1,
1029	0
1030	);
1031
1032	/* set up @_ -- ugly */
1033	av_clear (defav);
1034	av_fill (defav, items - 1);
1035	while (items--)
1036	av_store (defav, items, SvREFCNT_inc (ST(items)));
1037
1038	sv = av_pop ((AV *)SvRV (yieldstack));
1039	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1040	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1041	SvREFCNT_dec (sv);
1042
1043	transfer (aTHX_ prev, next, 0);
1044		1167
1045	MODULE = Coro::State PACKAGE = Coro	1168	MODULE = Coro::State PACKAGE = Coro
1046		1169
1047	# this is slightly dirty (should expose a c-level api)
1048
1049	BOOT:	1170	BOOT:
1050	{	1171	{
1051	int i;	1172	int i;
		1173
1052	HV *stash = gv_stashpv ("Coro", TRUE);	1174	coro_stash = gv_stashpv ("Coro", TRUE);
1053		1175
1054	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1176	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1055	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1177	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1056	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1178	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1057	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1179	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1058	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1180	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1059	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1181	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1060		1182
1061	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1183	coro_current = get_sv ("Coro::current", FALSE);
1062	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1184	SvREADONLY_on (coro_current);
1063		1185
1064	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1186	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1065	coro_ready[i] = newAV ();	1187	coro_ready[i] = newAV ();
1066		1188
1067	{	1189	{
1068	SV *sv = perl_get_sv("Coro::API", 1);	1190	SV *sv = perl_get_sv("Coro::API", 1);
1069		1191
1070	coroapi.schedule = api_schedule;	1192	coroapi.schedule = api_schedule;
		1193	coroapi.save = api_save;
1071	coroapi.cede = api_cede;	1194	coroapi.cede = api_cede;
1072	coroapi.ready = api_ready;	1195	coroapi.ready = api_ready;
		1196	coroapi.is_ready = api_is_ready;
1073	coroapi.nready = &coro_nready;	1197	coroapi.nready = &coro_nready;
1074	coroapi.current = coro_current;	1198	coroapi.current = coro_current;
1075		1199
1076	GCoroAPI = &coroapi;	1200	GCoroAPI = &coroapi;
1077	sv_setiv(sv, (IV)&coroapi);	1201	sv_setiv (sv, (IV)&coroapi);
1078	SvREADONLY_on(sv);	1202	SvREADONLY_on (sv);
1079	}	1203	}
1080	}	1204	}
1081		1205
1082	#if !PERL_MICRO
1083
1084	void	1206	void
1085	ready(self)	1207	_set_current (SV *current)
1086	SV * self
1087	PROTOTYPE: $	1208	PROTOTYPE: $
1088	CODE:	1209	CODE:
1089	api_ready (self);	1210	SvREFCNT_dec (SvRV (coro_current));
1090		1211	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1091	#endif
1092		1212
1093	int	1213	int
		1214	prio (Coro::State coro, int newprio = 0)
		1215	ALIAS:
		1216	nice = 1
		1217	CODE:
		1218	{
		1219	RETVAL = coro->prio;
		1220
		1221	if (items > 1)
		1222	{
		1223	if (ix)
		1224	newprio += coro->prio;
		1225
		1226	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1227	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1228
		1229	coro->prio = newprio;
		1230	}
		1231	}
		1232
		1233	SV *
		1234	ready (SV *self)
		1235	PROTOTYPE: $
		1236	CODE:
		1237	RETVAL = boolSV (api_ready (self));
		1238	OUTPUT:
		1239	RETVAL
		1240
		1241	SV *
		1242	is_ready (SV *self)
		1243	PROTOTYPE: $
		1244	CODE:
		1245	RETVAL = boolSV (api_is_ready (self));
		1246	OUTPUT:
		1247	RETVAL
		1248
		1249	int
1094	nready(...)	1250	nready (...)
1095	PROTOTYPE:	1251	PROTOTYPE:
1096	CODE:	1252	CODE:
1097	RETVAL = coro_nready;	1253	RETVAL = coro_nready;
1098	OUTPUT:	1254	OUTPUT:
1099	RETVAL	1255	RETVAL
1100		1256
1101	void	1257	MODULE = Coro::State PACKAGE = Coro::AIO
1102	schedule(...)	1258
1103	PROTOTYPE:	1259	SV *
		1260	_get_state ()
1104	CODE:	1261	CODE:
1105	api_schedule ();
1106
1107	void
1108	cede(...)
1109	PROTOTYPE:
1110	CODE:
1111	api_cede ();
1112
1113	# and these are hacks
1114	SV *
1115	_aio_get_state ()
1116	CODE:
1117	{	1262	{
1118	struct {	1263	struct io_state *data;
1119	int errorno;
1120	int laststype;
1121	int laststatval;
1122	Stat_t statcache;
1123	} data;
1124		1264
		1265	RETVAL = newSV (sizeof (struct io_state));
		1266	data = (struct io_state *)SvPVX (RETVAL);
		1267	SvCUR_set (RETVAL, sizeof (struct io_state));
		1268	SvPOK_only (RETVAL);
		1269
1125	data.errorno = errno;	1270	data->errorno = errno;
1126	data.laststype = PL_laststype;	1271	data->laststype = PL_laststype;
1127	data.laststatval = PL_laststatval;	1272	data->laststatval = PL_laststatval;
1128	data.statcache = PL_statcache;	1273	data->statcache = PL_statcache;
1129
1130	RETVAL = newSVpvn ((char *)&data, sizeof data);
1131	}	1274	}
1132	OUTPUT:	1275	OUTPUT:
1133	RETVAL	1276	RETVAL
1134		1277
1135	void	1278	void
1136	_aio_set_state (char *data_)	1279	_set_state (char *data_)
1137	PROTOTYPE: $	1280	PROTOTYPE: $
1138	CODE:	1281	CODE:
1139	{	1282	{
1140	struct {	1283	struct io_state *data = (void *)data_;
1141	int errorno;
1142	int laststype;
1143	int laststatval;
1144	Stat_t statcache;
1145	} *data = (void *)data_;
1146		1284
1147	errno = data->errorno;	1285	errno = data->errorno;
1148	PL_laststype = data->laststype;	1286	PL_laststype = data->laststype;
1149	PL_laststatval = data->laststatval;	1287	PL_laststatval = data->laststatval;
1150	PL_statcache = data->statcache;	1288	PL_statcache = data->statcache;
1151	}	1289	}
		1290

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