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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.90 by root, Sat Nov 25 00:56:35 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		76
64	/* 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
65	* 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
66	* and should be unique. */	79	* and should be unique. */
		80	#define dSTACKLEVEL int stacklevel
67	#define dSTACKLEVEL void *stacklevel = &stacklevel	81	#define STACKLEVEL ((void *)&stacklevel)
68		82
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	83	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		84
71	#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))
72		92
73	#include "CoroAPI.h"	93	#include "CoroAPI.h"
74		94
75	#ifdef USE_ITHREADS	95	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	96	static perl_mutex coro_mutex;
…		…
79	#else	99	#else
80	# define LOCK (void)0	100	# define LOCK (void)0
81	# define UNLOCK (void)0	101	# define UNLOCK (void)0
82	#endif	102	#endif
83		103
		104	struct io_state
		105	{
		106	int errorno;
		107	I32 laststype;
		108	int laststatval;
		109	Stat_t statcache;
		110	};
		111
84	static struct CoroAPI coroapi;	112	static struct CoroAPI coroapi;
85	static AV *main_mainstack; /* used to differentiate between $main and others */	113	static AV *main_mainstack; /* used to differentiate between $main and others */
86	static HV *coro_state_stash, *coro_stash;	114	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	115	static SV *coro_mortal; /* will be freed after next transfer */
88		116
89	/* this is actually not just 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 */
90	typedef struct coro_stack {	121	typedef struct coro_cctx {
91	struct coro_stack *next;	122	struct coro_cctx *next;
92		123
93	void *idle_sp;	124	/* the stack */
94	void *sptr;	125	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	126	long ssize; /* positive == mmap, otherwise malloc */
96		127
97	/* cpu state */	128	/* cpu state */
		129	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		130	JMPENV *top_env;
98	coro_context cctx;	131	coro_context cctx;
99	} coro_stack;
100		132
101	static coro_stack *main_stack;	133	int inuse;
102		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 */
103	struct coro {	147	struct coro {
104	/* optionally saved, might be zero */	148	/* the c coroutine allocated to this perl coroutine, if any */
105	AV *defav;	149	coro_cctx *cctx;
106	SV *defsv;
107	SV *errsv;
108
109	/* saved global state not related to stacks */
110	U8 dowarn;
111	I32 in_eval;
112
113	/* the c stack, if any */
114	coro_stack *stack;
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		150
150	/* data associated with this coroutine (initial args) */	151	/* data associated with this coroutine (initial args) */
151	AV *args;	152	AV *args;
152	int refcnt;	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;
153	};	169	};
154		170
155	typedef struct coro *Coro__State;	171	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	172	typedef struct coro *Coro__State_or_hashref;
157		173
158	static AV *	174	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	175	coro_clone_padlist (CV *cv)
160	{	176	{
161	AV *padlist = CvPADLIST (cv);	177	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	178	AV *newpadlist, *newpad;
163		179
164	newpadlist = newAV ();	180	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	181	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	182	#if PERL_VERSION_ATLEAST (5,9,0)
		183	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		184	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	185	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	186	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	187	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	188	--AvFILLp (padlist);
173		189
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	190	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
176		192
177	return newpadlist;	193	return newpadlist;
178	}	194	}
179		195
180	static void	196	static void
181	free_padlist (pTHX_ AV *padlist)	197	free_padlist (AV *padlist)
182	{	198	{
183	/* may be during global destruction */	199	/* may be during global destruction */
184	if (SvREFCNT (padlist))	200	if (SvREFCNT (padlist))
185	{	201	{
186	I32 i = AvFILLp (padlist);	202	I32 i = AvFILLp (padlist);
…		…
207	AV *padlist;	223	AV *padlist;
208	AV *av = (AV *)mg->mg_obj;	224	AV *av = (AV *)mg->mg_obj;
209		225
210	/* casting is fun. */	226	/* casting is fun. */
211	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	227	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212	free_padlist (aTHX_ padlist);	228	free_padlist (padlist);
213		229
214	SvREFCNT_dec (av);	230	SvREFCNT_dec (av);
215		231
216	return 0;	232	return 0;
217	}	233	}
218		234
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	235	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		236
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	237	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		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
223	/* the next two functions merely cache the padlists */	246	/* the next two functions merely cache the padlists */
224	static void	247	static void
225	get_padlist (pTHX_ CV *cv)	248	get_padlist (CV *cv)
226	{	249	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	250	MAGIC *mg = CORO_MAGIC (cv);
		251	AV *av;
228		252
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	253	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	254	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	255	else
232	{	256	{
233	#if 0	257	#if 0
234	/* this should work - but it doesn't :( */	258	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	259	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	260	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	261	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	262	SvREFCNT_dec (cp);
239	#else	263	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	264	CvPADLIST (cv) = coro_clone_padlist (cv);
241	#endif	265	#endif
242	}	266	}
243	}	267	}
244		268
245	static void	269	static void
246	put_padlist (pTHX_ CV *cv)	270	put_padlist (CV *cv)
247	{	271	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	272	MAGIC *mg = CORO_MAGIC (cv);
		273	AV *av;
249		274
250	if (!mg)	275	if (!mg)
251	{	276	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	277	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	278	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	279	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	280	mg->mg_obj = (SV *)newAV ();
256	}	281	}
257		282
258	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);
259	}	289	}
260		290
261	#define SB do {	291	#define SB do {
262	#define SE } while (0)	292	#define SE } while (0)
263		293
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	294	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
268		295
269	static void	296	static void
270	load_state(pTHX_ Coro__State c)	297	load_perl (Coro__State c)
271	{	298	{
272	PL_dowarn = c->dowarn;	299	#define VAR(name,type) PL_ ## name = c->name;
273	PL_in_eval = c->in_eval;	300	# include "state.h"
274		301	#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		302
307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	303	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	304	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
309	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);
310		307
311	{	308	{
312	dSP;	309	dSP;
313	CV *cv;	310	CV *cv;
314		311
315	/* now do the ugly restore mess */	312	/* now do the ugly restore mess */
316	while ((cv = (CV *)POPs))	313	while ((cv = (CV *)POPs))
317	{	314	{
318	AV *padlist = (AV *)POPs;
319
320	if (padlist)
321	{
322	put_padlist (aTHX_ cv); /* mark this padlist as available */	315	put_padlist (cv); /* mark this padlist as available */
323	CvPADLIST(cv) = padlist;	316	CvDEPTH (cv) = PTR2IV (POPs);
324	}	317	CvPADLIST (cv) = (AV *)POPs;
325
326	++CvDEPTH(cv);
327	}	318	}
328		319
329	PUTBACK;	320	PUTBACK;
330	}	321	}
331	}	322	}
332		323
333	static void	324	static void
334	save_state(pTHX_ Coro__State c, int flags)	325	save_perl (Coro__State c)
335	{	326	{
336	{	327	{
337	dSP;	328	dSP;
338	I32 cxix = cxstack_ix;	329	I32 cxix = cxstack_ix;
339	PERL_CONTEXT *ccstk = cxstack;	330	PERL_CONTEXT *ccstk = cxstack;
…		…
350	{	341	{
351	while (cxix >= 0)	342	while (cxix >= 0)
352	{	343	{
353	PERL_CONTEXT *cx = &ccstk[cxix--];	344	PERL_CONTEXT *cx = &ccstk[cxix--];
354		345
355	if (CxTYPE(cx) == CXt_SUB)	346	if (CxTYPE (cx) == CXt_SUB)
356	{	347	{
357	CV *cv = cx->blk_sub.cv;	348	CV *cv = cx->blk_sub.cv;
		349
358	if (CvDEPTH(cv))	350	if (CvDEPTH (cv))
359	{	351	{
360	EXTEND (SP, CvDEPTH(cv)*2);	352	EXTEND (SP, 3);
361		353
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));	354	PUSHs ((SV *)CvPADLIST (cv));
		355	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
370	PUSHs ((SV *)cv);	356	PUSHs ((SV *)cv);
371		357
		358	CvDEPTH (cv) = 0;
372	get_padlist (aTHX_ cv);	359	get_padlist (cv);
373	}	360	}
374	}	361	}
375	#ifdef CXt_FORMAT	362	#ifdef CXt_FORMAT
376	else if (CxTYPE(cx) == CXt_FORMAT)	363	else if (CxTYPE (cx) == CXt_FORMAT)
377	{	364	{
378	/* 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? */
379	/* my bold guess is as a simple, plain sub... */	366	/* my bold guess is as a simple, plain sub... */
380	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");
381	}	368	}
…		…
391	}	378	}
392		379
393	PUTBACK;	380	PUTBACK;
394	}	381	}
395		382
396	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;
397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	384	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
398	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;
399		387
400	c->dowarn = PL_dowarn;	388	#define VAR(name,type)c->name = PL_ ## name;
401	c->in_eval = PL_in_eval;	389	# include "state.h"
402		390	#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	}	391	}
435		392
436	/*	393	/*
437	* allocate various perl stacks. This is an exact copy	394	* allocate various perl stacks. This is an exact copy
438	* of perl.c:init_stacks, except that it uses less memory	395	* of perl.c:init_stacks, except that it uses less memory
439	* on the (sometimes correct) assumption that coroutines do	396	* on the (sometimes correct) assumption that coroutines do
440	* not usually need a lot of stackspace.	397	* not usually need a lot of stackspace.
441	*/	398	*/
442	static void	399	static void
443	coro_init_stacks (pTHX)	400	coro_init_stacks ()
444	{	401	{
445	LOCK;
446
447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	402	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
448	PL_curstackinfo->si_type = PERLSI_MAIN;	403	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	404	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	405	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		406
452	PL_stack_base = AvARRAY(PL_curstack);	407	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	408	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	409	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		410
456	New(50,PL_tmps_stack,96,SV*);	411	New(50,PL_tmps_stack,128,SV*);
457	PL_tmps_floor = -1;	412	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	413	PL_tmps_ix = -1;
459	PL_tmps_max = 96;	414	PL_tmps_max = 128;
460		415
461	New(54,PL_markstack,16,I32);	416	New(54,PL_markstack,32,I32);
462	PL_markstack_ptr = PL_markstack;	417	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 16;	418	PL_markstack_max = PL_markstack + 32;
464		419
465	#ifdef SET_MARK_OFFSET	420	#ifdef SET_MARK_OFFSET
466	SET_MARK_OFFSET;	421	SET_MARK_OFFSET;
467	#endif	422	#endif
468		423
469	New(54,PL_scopestack,16,I32);	424	New(54,PL_scopestack,32,I32);
470	PL_scopestack_ix = 0;	425	PL_scopestack_ix = 0;
471	PL_scopestack_max = 16;	426	PL_scopestack_max = 32;
472		427
473	New(54,PL_savestack,96,ANY);	428	New(54,PL_savestack,64,ANY);
474	PL_savestack_ix = 0;	429	PL_savestack_ix = 0;
475	PL_savestack_max = 96;	430	PL_savestack_max = 64;
476		431
477	#if PERL_VERSION < 9	432	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,8,OP*);	433	New(54,PL_retstack,16,OP*);
479	PL_retstack_ix = 0;	434	PL_retstack_ix = 0;
480	PL_retstack_max = 8;	435	PL_retstack_max = 16;
481	#endif	436	#endif
482
483	UNLOCK;
484	}	437	}
485		438
486	/*	439	/*
487	* destroy the stacks, the callchain etc...	440	* destroy the stacks, the callchain etc...
488	*/	441	*/
489	static void	442	static void
490	destroy_stacks(pTHX)	443	coro_destroy_stacks ()
491	{	444	{
492	if (!IN_DESTRUCT)	445	if (!IN_DESTRUCT)
493	{	446	{
494	/* is this ugly, I ask? */	447	/* is this ugly, I ask? */
495	LEAVE_SCOPE (0);	448	LEAVE_SCOPE (0);
…		…
526		479
527	Safefree (PL_tmps_stack);	480	Safefree (PL_tmps_stack);
528	Safefree (PL_markstack);	481	Safefree (PL_markstack);
529	Safefree (PL_scopestack);	482	Safefree (PL_scopestack);
530	Safefree (PL_savestack);	483	Safefree (PL_savestack);
531	#if PERL_VERSION < 9	484	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree (PL_retstack);	485	Safefree (PL_retstack);
533	#endif	486	#endif
534	}	487	}
535		488
536	static void	489	static void
537	setup_coro (struct coro *coro)	490	setup_coro (struct coro *coro)
538	{	491	{
539	/*	492	/*
540	* emulate part of the perl startup here.	493	* emulate part of the perl startup here.
541	*/	494	*/
542	dTHX;
543	dSP;
544	UNOP myop;
545	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
546		495
547	coro_init_stacks (aTHX);	496	coro_init_stacks ();
548	/*PL_curcop = 0;*/	497
549	/*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
550	SvREFCNT_dec (GvAV (PL_defgv));	509	SvREFCNT_dec (GvAV (PL_defgv));
551	GvAV (PL_defgv) = coro->args; coro->args = 0;	510	GvAV (PL_defgv) = coro->args; coro->args = 0;
552		511
553	SPAGAIN;
554
555	Zero (&myop, 1, UNOP);	512	Zero (&myop, 1, LOGOP);
556	myop.op_next = Nullop;	513	myop.op_next = Nullop;
557	myop.op_flags = OPf_WANT_VOID;	514	myop.op_flags = OPf_WANT_VOID;
558		515
		516	PUSHMARK (SP);
		517	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		518	PUTBACK;
559	PL_op = (OP *)&myop;	519	PL_op = (OP *)&myop;
560
561	PUSHMARK(SP);
562	XPUSHs (sub_init);
563	PUTBACK;
564	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	520	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565	SPAGAIN;	521	SPAGAIN;
		522	}
566		523
567	ENTER; /* necessary e.g. for dounwind */	524	ENTER; /* necessary e.g. for dounwind */
568	}	525	}
569		526
570	static void	527	static void
571	transfer_tail ()	528	free_coro_mortal ()
572	{	529	{
573	if (coro_mortal)	530	if (coro_mortal)
574	{	531	{
575	SvREFCNT_dec (coro_mortal);	532	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;	533	coro_mortal = 0;
577	}	534	}
		535	}
578		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. */
579	UNLOCK;	562	UNLOCK;
580	}
581		563
582	static void
583	coro_run (void *arg)
584	{
585	/*	564	/*
586	* this is a _very_ stripped down perl interpreter ;)	565	* this is a _very_ stripped down perl interpreter ;)
587	*/	566	*/
588	dTHX;
589
590	transfer_tail ();
591
592	PL_top_env = &PL_start_env;	567	PL_top_env = &PL_start_env;
593	PL_restartop = PL_op->op_next;	568
		569	/* inject call to cctx_init */
		570	prepare_cctx ((coro_cctx *)arg);
		571
594	/* somebody will hit me for both perl_run and PL_restart_top */	572	/* somebody will hit me for both perl_run and PL_restartop */
595	perl_run (aTHX_ PERL_GET_CONTEXT);	573	PL_restartop = PL_op;
		574	perl_run (PL_curinterp);
596		575
		576	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
597	abort ();	577	abort ();
598	}	578	}
599		579
600	static coro_stack *	580	static coro_cctx *
601	stack_new ()	581	cctx_new ()
602	{	582	{
603	coro_stack *stack;	583	coro_cctx *cctx;
604		584
		585	++cctx_count;
		586
605	New (0, stack, 1, coro_stack);	587	New (0, cctx, 1, coro_cctx);
606		588
607	#if HAVE_MMAP	589	#if HAVE_MMAP
608		590
609	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	591	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		592	/* mmap supposedly does allocate-on-write for us */
610	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	593	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
611		594
612	if (stack->sptr == (void *)-1)	595	if (cctx->sptr == (void *)-1)
613	{	596	{
614	fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n");	597	perror ("FATAL: unable to mmap stack for coroutine");
615	_exit (EXIT_FAILURE);	598	_exit (EXIT_FAILURE);
616	}	599	}
617		600
		601	# if STACKGUARD
618	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	602	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		603	# endif
619		604
620	#else	605	#else
621		606
622	stack->ssize = STACKSIZE * (long)sizeof (long);	607	cctx->ssize = STACKSIZE * (long)sizeof (long);
623	New (0, stack->sptr, STACKSIZE, long);	608	New (0, cctx->sptr, STACKSIZE, long);
624		609
625	if (!stack->sptr)	610	if (!cctx->sptr)
626	{	611	{
627	fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");	612	perror ("FATAL: unable to malloc stack for coroutine");
628	_exit (EXIT_FAILURE);	613	_exit (EXIT_FAILURE);
629	}	614	}
630		615
631	#endif	616	#endif
632		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
633	coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize);	625	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
634		626
635	return stack;	627	return cctx;
636	}	628	}
637		629
638	static void	630	static void
639	stack_free (coro_stack *stack)	631	cctx_destroy (coro_cctx *cctx)
640	{	632	{
641	if (!stack || stack == main_stack)	633	if (!cctx)
642	return;	634	return;
643		635
		636	--cctx_count;
		637
		638	#if USE_VALGRIND
		639	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		640	#endif
		641
644	#if HAVE_MMAP	642	#if HAVE_MMAP
645	munmap (stack->sptr, stack->ssize);	643	munmap (cctx->sptr, cctx->ssize);
646	#else	644	#else
647	Safefree (stack->sptr);	645	Safefree (cctx->sptr);
648	#endif	646	#endif
649		647
650	Safefree (stack);	648	Safefree (cctx);
651	}	649	}
652		650
653	static coro_stack *stack_first;	651	static coro_cctx *
654		652	cctx_get ()
655	static void
656	stack_get (struct coro *coro)
657	{	653	{
		654	coro_cctx *cctx;
		655
658	if (stack_first)	656	if (cctx_first)
659	{	657	{
660	coro->stack = stack_first;	658	cctx = cctx_first;
661	stack_first = stack_first->next;	659	cctx_first = cctx->next;
		660	--cctx_idle;
662	}	661	}
663	else	662	else
664	coro->stack = stack_new ();	663	{
665	}	664	cctx = cctx_new ();
		665	PL_op = PL_op->op_next;
		666	}
666		667
		668	return cctx;
		669	}
		670
667	static void	671	static void
668	stack_put (coro_stack *stack)	672	cctx_put (coro_cctx *cctx)
669	{	673	{
670	stack->next = stack_first;	674	/* free another cctx if overlimit */
671	stack_first = stack;	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;
672	}	688	}
673		689
674	/* never call directly, always through the coro_state_transfer global variable */	690	/* never call directly, always through the coro_state_transfer global variable */
675	static void	691	static void NOINLINE
676	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	692	transfer (struct coro *prev, struct coro *next)
677	{	693	{
678	dSTACKLEVEL;	694	dSTACKLEVEL;
679		695
680	/* sometimes transfer is only called to set idle_sp */	696	/* sometimes transfer is only called to set idle_sp */
681	if (!prev->stack->idle_sp)	697	if (!next)
682	prev->stack->idle_sp = stacklevel;	698	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
683
684	LOCK;
685
686	if (prev != next)	699	else if (prev != next)
687	{	700	{
688	coro_stack *prev_stack = prev->stack;	701	coro_cctx *prev__cctx;
689		702
690	/* possibly "free" the stack */	703	if (prev->flags & CF_NEW)
691	if (prev_stack->idle_sp == stacklevel)
692	{	704	{
693	stack_put (prev_stack);	705	/* create a new empty context */
694	prev->stack = 0;	706	Newz (0, prev->cctx, 1, coro_cctx);
		707	prev->cctx->inuse = 1;
		708	prev->flags &= ~CF_NEW;
		709	prev->flags |= CF_RUNNING;
695	}	710	}
696		711
697	if (next->mainstack)	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)
698	{	725	{
699	/* coroutine already started */	726	/* need to start coroutine */
700	SAVE (prev, flags);	727	next->flags &= ~CF_NEW;
701	LOAD (next);	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);
702	}	734	}
703	else	735	else
704	{	736	{
705	/* need to start coroutine */	737	/* coroutine already started */
706	/* first get rid of the old state */	738	save_perl (prev);
707	SAVE (prev, -1);	739	load_perl (next);
708	/* setup coroutine call */
709	setup_coro (next);
710	/* need to change stack from main_stack to real one */
711	next->stack = 0;
712	}	740	}
713		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
714	if (!next->stack)	756	if (!next->cctx)
715	stack_get (next);	757	{
		758	next->cctx = cctx_get ();
		759	assert (!next->cctx->inuse);
		760	next->cctx->inuse = 1;
		761	}
716		762
717	if (prev_stack != next->stack)	763	if (prev__cctx != next->cctx)
		764	{
		765	prev__cctx->top_env = PL_top_env;
		766	PL_top_env = next->cctx->top_env;
718	coro_transfer (&prev_stack->cctx, &next->stack->cctx);	767	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		768	}
		769
		770	free_coro_mortal ();
		771
		772	UNLOCK;
719	}	773	}
720
721	transfer_tail ();
722	}	774	}
723		775
724	/* use this function pointer to call the above function */	776	struct transfer_args
725	/* this is done to increase chances of the compiler not inlining the call */	777	{
726	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	778	struct coro *prev, *next;
		779	};
		780
		781	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
727		782
728	static void	783	static void
729	coro_state_destroy (struct coro *coro)	784	coro_state_destroy (struct coro *coro)
730	{	785	{
731	if (coro->refcnt--)	786	if (coro->refcnt--)
732	return;	787	return;
733		788
734	if (coro->mainstack && coro->mainstack != main_mainstack)	789	if (coro->mainstack && coro->mainstack != main_mainstack)
735	{	790	{
736	struct coro temp;	791	struct coro temp;
		792	Zero (&temp, 1, struct coro);
		793	temp.save = CORO_SAVE_ALL;
737		794
738	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	795	if (coro->flags & CF_RUNNING)
739	LOAD (aTHX_ coro);	796	croak ("FATAL: tried to destroy currently running coroutine");
740		797
		798	save_perl (&temp);
		799	load_perl (coro);
		800
741	destroy_stacks (aTHX);	801	coro_destroy_stacks ();
742		802
743	LOAD ((&temp)); /* this will get rid of defsv etc.. */	803	load_perl (&temp); /* this will get rid of defsv etc.. */
744		804
745	coro->mainstack = 0;	805	coro->mainstack = 0;
746	}	806	}
747		807
748	stack_free (coro->stack);	808	cctx_destroy (coro->cctx);
749	SvREFCNT_dec (coro->args);	809	SvREFCNT_dec (coro->args);
750	Safefree (coro);	810	Safefree (coro);
751	}	811	}
752		812
753	static int	813	static int
754	coro_state_clear (SV *sv, MAGIC *mg)	814	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
755	{	815	{
756	struct coro *coro = (struct coro *)mg->mg_ptr;	816	struct coro *coro = (struct coro *)mg->mg_ptr;
757	mg->mg_ptr = 0;	817	mg->mg_ptr = 0;
758		818
759	coro_state_destroy (coro);	819	coro_state_destroy (coro);
760		820
761	return 0;	821	return 0;
762	}	822	}
763		823
764	static int	824	static int
765	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	825	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
766	{	826	{
767	struct coro *coro = (struct coro *)mg->mg_ptr;	827	struct coro *coro = (struct coro *)mg->mg_ptr;
768		828
769	++coro->refcnt;	829	++coro->refcnt;
770		830
771	return 0;	831	return 0;
772	}	832	}
773		833
774	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	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	};
775		844
776	static struct coro *	845	static struct coro *
777	SvSTATE (SV *coro)	846	SvSTATE (SV *coro)
778	{	847	{
779	HV *stash;	848	HV *stash;
…		…
794	assert (mg->mg_type == PERL_MAGIC_ext);	863	assert (mg->mg_type == PERL_MAGIC_ext);
795	return (struct coro *)mg->mg_ptr;	864	return (struct coro *)mg->mg_ptr;
796	}	865	}
797		866
798	static void	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
799	api_transfer (pTHX_ SV *prev, SV *next, int flags)	875	api_transfer (SV *prev_sv, SV *next_sv)
800	{	876	{
801	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	877	struct transfer_args ta;
		878
		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;
802	}	893	}
803		894
804	/** Coro ********************************************************************/	895	/** Coro ********************************************************************/
805		896
806	#define PRIO_MAX 3	897	#define PRIO_MAX 3
…		…
809	#define PRIO_LOW -1	900	#define PRIO_LOW -1
810	#define PRIO_IDLE -3	901	#define PRIO_IDLE -3
811	#define PRIO_MIN -4	902	#define PRIO_MIN -4
812		903
813	/* for Coro.pm */	904	/* for Coro.pm */
814	static GV *coro_current, *coro_idle;	905	static SV *coro_current;
815	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	906	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
816	static int coro_nready;	907	static int coro_nready;
817		908
818	static void	909	static void
819	coro_enq (pTHX_ SV *sv)	910	coro_enq (SV *coro_sv)
820	{	911	{
821	int prio;
822
823	if (SvTYPE (sv) != SVt_PVHV)
824	croak ("Coro::ready tried to enqueue something that is not a coroutine");
825
826	prio = SvSTATE (sv)->prio;
827
828	av_push (coro_ready [prio - PRIO_MIN], sv);	912	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
829	coro_nready++;	913	coro_nready++;
830	}	914	}
831		915
832	static SV *	916	static SV *
833	coro_deq (pTHX_ int min_prio)	917	coro_deq (int min_prio)
834	{	918	{
835	int prio = PRIO_MAX - PRIO_MIN;	919	int prio = PRIO_MAX - PRIO_MIN;
836		920
837	min_prio -= PRIO_MIN;	921	min_prio -= PRIO_MIN;
838	if (min_prio < 0)	922	if (min_prio < 0)
…		…
846	}	930	}
847		931
848	return 0;	932	return 0;
849	}	933	}
850		934
851	static void	935	static int
852	api_ready (SV *coro)	936	api_ready (SV *coro_sv)
853	{	937	{
854	dTHX;	938	struct coro *coro;
855		939
856	if (SvROK (coro))	940	if (SvROK (coro_sv))
857	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;
858		954
859	LOCK;	955	LOCK;
860	coro_enq (aTHX_ SvREFCNT_inc (coro));	956	coro_enq (SvREFCNT_inc (coro_sv));
861	UNLOCK;	957	UNLOCK;
862	}
863		958
		959	return 1;
		960	}
		961
864	static void	962	static int
865	api_schedule (void)	963	api_is_ready (SV *coro_sv)
866	{	964	{
867	dTHX;	965	return !!SvSTATE (coro_sv)->flags & CF_READY;
		966	}
868		967
		968	static void
		969	prepare_schedule (struct transfer_args *ta)
		970	{
869	SV *prev, *next;	971	SV *prev, *next;
870	SV *current = GvSV (coro_current);
871		972
872	for (;;)	973	for (;;)
873	{	974	{
874	LOCK;	975	LOCK;
875
876	next = coro_deq (aTHX_ PRIO_MIN);	976	next = coro_deq (PRIO_MIN);
		977	UNLOCK;
877		978
878	if (next)	979	if (next)
879	break;	980	break;
880		981
881	UNLOCK;
882
883	{	982	{
884	dSP;	983	dSP;
885		984
886	ENTER;	985	ENTER;
887	SAVETMPS;	986	SAVETMPS;
888		987
889	PUSHMARK (SP);	988	PUSHMARK (SP);
890	PUTBACK;	989	PUTBACK;
891	call_sv (GvSV (coro_idle), G_DISCARD);	990	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
892		991
893	FREETMPS;	992	FREETMPS;
894	LEAVE;	993	LEAVE;
895	}	994	}
896	}	995	}
897		996
898	prev = SvRV (current);	997	prev = SvRV (coro_current);
899	SvRV (current) = next;	998	SvRV_set (coro_current, next);
900		999
901	/* free this only after the transfer */	1000	/* free this only after the transfer */
		1001	LOCK;
		1002	free_coro_mortal ();
		1003	UNLOCK;
902	coro_mortal = prev;	1004	coro_mortal = prev;
903		1005
904	UNLOCK;	1006	assert (!SvROK(prev));//D
		1007	assert (!SvROK(next));//D
905		1008
906	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);	1009	ta->prev = SvSTATE (prev);
907	}	1010	ta->next = SvSTATE (next);
908		1011
909	static int coro_cede_self;	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);
		1022	}
		1023
		1024	static void
		1025	api_schedule (void)
		1026	{
		1027	struct transfer_args ta;
		1028
		1029	prepare_schedule (&ta);
		1030	TRANSFER (ta);
		1031	}
910		1032
911	static void	1033	static void
912	api_cede (void)	1034	api_cede (void)
913	{	1035	{
914	dTHX;	1036	struct transfer_args ta;
915	SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));
916		1037
917	LOCK;	1038	prepare_cede (&ta);
918		1039	TRANSFER (ta);
919	if (coro_cede_self)
920	{
921	AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN];
922	av_unshift (runqueue, 1);
923	av_store (runqueue, 0, current);
924	coro_nready++;
925	coro_cede_self = 0;
926	}
927	else
928	coro_enq (aTHX_ current);
929
930	UNLOCK;
931
932	api_schedule ();
933	}	1040	}
934		1041
935	MODULE = Coro::State PACKAGE = Coro::State	1042	MODULE = Coro::State PACKAGE = Coro::State
936		1043
937	PROTOTYPES: DISABLE	1044	PROTOTYPES: DISABLE
…		…
943	#endif	1050	#endif
944	BOOT_PAGESIZE;	1051	BOOT_PAGESIZE;
945		1052
946	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1053	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
947		1054
948	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1055	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
949	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1056	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
950	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));
		1059	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
951		1060
952	main_mainstack = PL_mainstack;	1061	main_mainstack = PL_mainstack;
953		1062
954	coroapi.ver = CORO_API_VERSION;	1063	coroapi.ver = CORO_API_VERSION;
955	coroapi.transfer = api_transfer;	1064	coroapi.transfer = api_transfer;
956
957	Newz (0, main_stack, 1, coro_stack);
958	main_stack->idle_sp = (void *)-1;
959		1065
960	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1066	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
961	}	1067	}
962		1068
963	SV *	1069	SV *
…		…
968	HV *hv;	1074	HV *hv;
969	int i;	1075	int i;
970		1076
971	Newz (0, coro, 1, struct coro);	1077	Newz (0, coro, 1, struct coro);
972	coro->args = newAV ();	1078	coro->args = newAV ();
		1079	coro->save = CORO_SAVE_ALL;
		1080	coro->flags = CF_NEW;
973		1081
974	hv = newHV ();	1082	hv = newHV ();
975	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1083	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
976	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1084	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
977		1085
978	av_push (coro->args, newSVsv (RETVAL));
979	for (i = 1; i < items; i++)	1086	for (i = 1; i < items; i++)
980	av_push (coro->args, newSVsv (ST (i)));	1087	av_push (coro->args, newSVsv (ST (i)));
981
982	coro->stack = main_stack;
983	/*coro->mainstack = 0; *//*actual work is done inside transfer */
984	/*coro->stack = 0;*/
985	}	1088	}
986	OUTPUT:	1089	OUTPUT:
987	RETVAL	1090	RETVAL
988		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
989	void	1099	void
990	transfer (prev, next, flags)	1100	_set_stacklevel (...)
991	SV *prev	1101	ALIAS:
992	SV *next	1102	Coro::State::transfer = 1
993	int flags	1103	Coro::schedule = 2
		1104	Coro::cede = 3
994	CODE:	1105	CODE:
995	PUTBACK;
996	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
997	SPAGAIN;
998
999	int
1000	prio (Coro::State coro, int newprio = 0)
1001	ALIAS:
1002	nice = 1
1003	CODE:
1004	{	1106	{
1005	RETVAL = coro->prio;	1107	struct transfer_args ta;
1006		1108
1007	if (items > 1)	1109	switch (ix)
1008	{	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:
1009	if (ix)	1117	if (items != 2)
1010	newprio += coro->prio;	1118	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1011		1119
1012	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1120	prepare_transfer (&ta, ST (0), ST (1));
1013	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1121	break;
1014		1122
1015	coro->prio = newprio;	1123	case 2:
		1124	prepare_schedule (&ta);
		1125	break;
		1126
		1127	case 3:
		1128	prepare_cede (&ta);
		1129	break;
1016	}	1130	}
1017	}
1018		1131
1019	void	1132	TRANSFER (ta);
1020	_clear_idle_sp (Coro::State self)	1133	}
1021	CODE:
1022	self->stack->idle_sp = 0;
1023		1134
1024	void	1135	void
1025	_clone_state_from (SV *dst, SV *src)	1136	_clone_state_from (SV *dst, SV *src)
1026	CODE:	1137	CODE:
1027	{	1138	{
…		…
1038	int code	1149	int code
1039	PROTOTYPE: $	1150	PROTOTYPE: $
1040	CODE:	1151	CODE:
1041	_exit (code);	1152	_exit (code);
1042		1153
1043	MODULE = Coro::State PACKAGE = Coro::Cont	1154	int
		1155	cctx_count ()
		1156	CODE:
		1157	RETVAL = cctx_count;
		1158	OUTPUT:
		1159	RETVAL
1044		1160
1045	void	1161	int
1046	yield (...)	1162	cctx_idle ()
1047	PROTOTYPE: @	1163	CODE:
1048	CODE:	1164	RETVAL = cctx_idle;
1049	{	1165	OUTPUT:
1050	SV *yieldstack;	1166	RETVAL
1051	SV *sv;
1052	AV *defav = GvAV (PL_defgv);
1053	struct coro *prev, *next;
1054
1055	yieldstack = *hv_fetch (
1056	(HV *)SvRV (GvSV (coro_current)),
1057	"yieldstack", sizeof ("yieldstack") - 1,
1058	0
1059	);
1060
1061	/* set up @_ -- ugly */
1062	av_clear (defav);
1063	av_fill (defav, items - 1);
1064	while (items--)
1065	av_store (defav, items, SvREFCNT_inc (ST(items)));
1066
1067	sv = av_pop ((AV *)SvRV (yieldstack));
1068	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1069	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1070	SvREFCNT_dec (sv);
1071
1072	coro_state_transfer (aTHX_ prev, next, 0);
1073	}
1074		1167
1075	MODULE = Coro::State PACKAGE = Coro	1168	MODULE = Coro::State PACKAGE = Coro
1076		1169
1077	BOOT:	1170	BOOT:
1078	{	1171	{
…		…
1085	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1178	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1086	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1179	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1087	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1180	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1088	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1181	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1089		1182
1090	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1183	coro_current = get_sv ("Coro::current", FALSE);
1091	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1184	SvREADONLY_on (coro_current);
1092		1185
1093	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1186	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1094	coro_ready[i] = newAV ();	1187	coro_ready[i] = newAV ();
1095		1188
1096	{	1189	{
1097	SV *sv = perl_get_sv("Coro::API", 1);	1190	SV *sv = perl_get_sv("Coro::API", 1);
1098		1191
1099	coroapi.schedule = api_schedule;	1192	coroapi.schedule = api_schedule;
		1193	coroapi.save = api_save;
1100	coroapi.cede = api_cede;	1194	coroapi.cede = api_cede;
1101	coroapi.ready = api_ready;	1195	coroapi.ready = api_ready;
		1196	coroapi.is_ready = api_is_ready;
1102	coroapi.nready = &coro_nready;	1197	coroapi.nready = &coro_nready;
1103	coroapi.current = coro_current;	1198	coroapi.current = coro_current;
1104		1199
1105	GCoroAPI = &coroapi;	1200	GCoroAPI = &coroapi;
1106	sv_setiv (sv, (IV)&coroapi);	1201	sv_setiv (sv, (IV)&coroapi);
1107	SvREADONLY_on (sv);	1202	SvREADONLY_on (sv);
1108	}	1203	}
1109	}	1204	}
1110		1205
1111	void	1206	void
		1207	_set_current (SV *current)
		1208	PROTOTYPE: $
		1209	CODE:
		1210	SvREFCNT_dec (SvRV (coro_current));
		1211	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1212
		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 *
1112	ready (SV *self)	1234	ready (SV *self)
1113	PROTOTYPE: $	1235	PROTOTYPE: $
1114	CODE:	1236	CODE:
1115	api_ready (self);	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
1116		1248
1117	int	1249	int
1118	nready (...)	1250	nready (...)
1119	PROTOTYPE:	1251	PROTOTYPE:
1120	CODE:	1252	CODE:
1121	RETVAL = coro_nready;	1253	RETVAL = coro_nready;
1122	OUTPUT:	1254	OUTPUT:
1123	RETVAL	1255	RETVAL
1124		1256
1125	void
1126	schedule (...)
1127	PROTOTYPE:
1128	CODE:
1129	api_schedule ();
1130
1131	void
1132	_set_cede_self ()
1133	CODE:
1134	coro_cede_self = 1;
1135
1136	void
1137	cede (...)
1138	PROTOTYPE:
1139	CODE:
1140	api_cede ();
1141
1142	MODULE = Coro::State PACKAGE = Coro::AIO	1257	MODULE = Coro::State PACKAGE = Coro::AIO
1143		1258
1144	SV *	1259	SV *
1145	_get_state ()	1260	_get_state ()
1146	CODE:	1261	CODE:
1147	{	1262	{
1148	struct {	1263	struct io_state *data;
1149	int errorno;
1150	int laststype;
1151	int laststatval;
1152	Stat_t statcache;
1153	} data;
1154		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
1155	data.errorno = errno;	1270	data->errorno = errno;
1156	data.laststype = PL_laststype;	1271	data->laststype = PL_laststype;
1157	data.laststatval = PL_laststatval;	1272	data->laststatval = PL_laststatval;
1158	data.statcache = PL_statcache;	1273	data->statcache = PL_statcache;
1159
1160	RETVAL = newSVpvn ((char *)&data, sizeof data);
1161	}	1274	}
1162	OUTPUT:	1275	OUTPUT:
1163	RETVAL	1276	RETVAL
1164		1277
1165	void	1278	void
1166	_set_state (char *data_)	1279	_set_state (char *data_)
1167	PROTOTYPE: $	1280	PROTOTYPE: $
1168	CODE:	1281	CODE:
1169	{	1282	{
1170	struct {	1283	struct io_state *data = (void *)data_;
1171	int errorno;
1172	int laststype;
1173	int laststatval;
1174	Stat_t statcache;
1175	} *data = (void *)data_;
1176		1284
1177	errno = data->errorno;	1285	errno = data->errorno;
1178	PL_laststype = data->laststype;	1286	PL_laststype = data->laststype;
1179	PL_laststatval = data->laststatval;	1287	PL_laststatval = data->laststatval;
1180	PL_statcache = data->statcache;	1288	PL_statcache = data->statcache;
1181	}	1289	}
		1290

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