[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.83 by root, Mon Nov 20 22:32:44 2006 UTC vs.
Revision 1.123 by root, Mon Dec 4 21:56:00 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 optional C context */	148	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	149	coro_cctx *cctx;
107	void *cursp;
108	int gencnt;
109
110	/* optionally saved, might be zero */
111	AV *defav;
112	SV *defsv;
113	SV *errsv;
114
115	/* saved global state not related to stacks */
116	U8 dowarn;
117	I32 in_eval;
118
119	/* the stacks and related info (callchain etc..) */
120	PERL_SI *curstackinfo;
121	AV *curstack;
122	AV *mainstack;
123	SV **stack_sp;
124	OP *op;
125	SV **curpad;
126	AV *comppad;
127	CV *compcv;
128	SV **stack_base;
129	SV **stack_max;
130	SV **tmps_stack;
131	I32 tmps_floor;
132	I32 tmps_ix;
133	I32 tmps_max;
134	I32 *markstack;
135	I32 *markstack_ptr;
136	I32 *markstack_max;
137	I32 *scopestack;
138	I32 scopestack_ix;
139	I32 scopestack_max;
140	ANY *savestack;
141	I32 savestack_ix;
142	I32 savestack_max;
143	OP **retstack;
144	I32 retstack_ix;
145	I32 retstack_max;
146	PMOP *curpm;
147	COP *curcop;
148	JMPENV *top_env;
149		150
150	/* data associated with this coroutine (initial args) */	151	/* data associated with this coroutine (initial args) */
151	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	SV irssv_sv; / real $/ cache */
		163
		164	#define VAR(name,type) type name;
		165	# include "state.h"
		166	#undef VAR
		167
		168	/* coro process data */
		169	int prio;
152	};	170	};
153		171
154	typedef struct coro *Coro__State;	172	typedef struct coro *Coro__State;
155	typedef struct coro *Coro__State_or_hashref;	173	typedef struct coro *Coro__State_or_hashref;
156		174
157	static AV *	175	static AV *
158	coro_clone_padlist (pTHX_ CV *cv)	176	coro_clone_padlist (CV *cv)
159	{	177	{
160	AV *padlist = CvPADLIST (cv);	178	AV *padlist = CvPADLIST (cv);
161	AV newpadlist, newpad;	179	AV newpadlist, newpad;
162		180
163	newpadlist = newAV ();	181	newpadlist = newAV ();
164	AvREAL_off (newpadlist);	182	AvREAL_off (newpadlist);
165	#if PERL_VERSION < 9	183	#if PERL_VERSION_ATLEAST (5,9,0)
		184	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		185	#else
166	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	186	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
167	#else
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169	#endif	187	#endif
170	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	188	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
171	--AvFILLp (padlist);	189	--AvFILLp (padlist);
172		190
173	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	191	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
175		193
176	return newpadlist;	194	return newpadlist;
177	}	195	}
178		196
179	static void	197	static void
180	free_padlist (pTHX_ AV *padlist)	198	free_padlist (AV *padlist)
181	{	199	{
182	/* may be during global destruction */	200	/* may be during global destruction */
183	if (SvREFCNT (padlist))	201	if (SvREFCNT (padlist))
184	{	202	{
185	I32 i = AvFILLp (padlist);	203	I32 i = AvFILLp (padlist);
…		…
206	AV *padlist;	224	AV *padlist;
207	AV av = (AV )mg->mg_obj;	225	AV av = (AV )mg->mg_obj;
208		226
209	/* casting is fun. */	227	/* casting is fun. */
210	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	228	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
211	free_padlist (aTHX_ padlist);	229	free_padlist (padlist);
212		230
213	SvREFCNT_dec (av);	231	SvREFCNT_dec (av);
214		232
215	return 0;	233	return 0;
216	}	234	}
217		235
218	#define PERL_MAGIC_coro PERL_MAGIC_ext	236	#define PERL_MAGIC_coro PERL_MAGIC_ext
219		237
220	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	238	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221		239
		240	#define CORO_MAGIC(cv) \
		241	SvMAGIC (cv) \
		242	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		243	? SvMAGIC (cv) \
		244	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		245	: 0
		246
222	/* the next two functions merely cache the padlists */	247	/* the next two functions merely cache the padlists */
223	static void	248	static void
224	get_padlist (pTHX_ CV *cv)	249	get_padlist (CV *cv)
225	{	250	{
226	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	251	MAGIC *mg = CORO_MAGIC (cv);
		252	AV *av;
227		253
228	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	254	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
229	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	255	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
230	else	256	else
231	{	257	{
232	#if 0	258	#if 0
233	/* this should work - but it doesn't :( */	259	/* this is probably cleaner, but also slower? */
234	CV *cp = Perl_cv_clone (aTHX_ cv);	260	CV *cp = Perl_cv_clone (cv);
235	CvPADLIST (cv) = CvPADLIST (cp);	261	CvPADLIST (cv) = CvPADLIST (cp);
236	CvPADLIST (cp) = 0;	262	CvPADLIST (cp) = 0;
237	SvREFCNT_dec (cp);	263	SvREFCNT_dec (cp);
238	#else	264	#else
239	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	265	CvPADLIST (cv) = coro_clone_padlist (cv);
240	#endif	266	#endif
241	}	267	}
242	}	268	}
243		269
244	static void	270	static void
245	put_padlist (pTHX_ CV *cv)	271	put_padlist (CV *cv)
246	{	272	{
247	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	273	MAGIC *mg = CORO_MAGIC (cv);
		274	AV *av;
248		275
249	if (!mg)	276	if (!mg)
250	{	277	{
251	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	278	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
252	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	279	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
253	mg->mg_virtual = &vtbl_coro;	280	mg->mg_virtual = &vtbl_coro;
254	mg->mg_obj = (SV *)newAV ();	281	mg->mg_obj = (SV *)newAV ();
255	}	282	}
256		283
257	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	284	av = (AV *)mg->mg_obj;
		285
		286	if (AvFILLp (av) >= AvMAX (av))
		287	av_extend (av, AvMAX (av) + 1);
		288
		289	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
258	}	290	}
259		291
260	#define SB do {	292	#define SB do {
261	#define SE } while (0)	293	#define SE } while (0)
262		294
263	#define LOAD(state) load_state(aTHX_ (state));
264	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
265
266	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	295	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
267		296
268	static void	297	static void
269	load_state(pTHX_ Coro__State c)	298	load_perl (Coro__State c)
270	{	299	{
271	PL_dowarn = c->dowarn;	300	#define VAR(name,type) PL_ ## name = c->name;
272	PL_in_eval = c->in_eval;	301	# include "state.h"
273		302	#undef VAR
274	PL_curstackinfo = c->curstackinfo;
275	PL_curstack = c->curstack;
276	PL_mainstack = c->mainstack;
277	PL_stack_sp = c->stack_sp;
278	PL_op = c->op;
279	PL_curpad = c->curpad;
280	PL_comppad = c->comppad;
281	PL_compcv = c->compcv;
282	PL_stack_base = c->stack_base;
283	PL_stack_max = c->stack_max;
284	PL_tmps_stack = c->tmps_stack;
285	PL_tmps_floor = c->tmps_floor;
286	PL_tmps_ix = c->tmps_ix;
287	PL_tmps_max = c->tmps_max;
288	PL_markstack = c->markstack;
289	PL_markstack_ptr = c->markstack_ptr;
290	PL_markstack_max = c->markstack_max;
291	PL_scopestack = c->scopestack;
292	PL_scopestack_ix = c->scopestack_ix;
293	PL_scopestack_max = c->scopestack_max;
294	PL_savestack = c->savestack;
295	PL_savestack_ix = c->savestack_ix;
296	PL_savestack_max = c->savestack_max;
297	#if PERL_VERSION < 9
298	PL_retstack = c->retstack;
299	PL_retstack_ix = c->retstack_ix;
300	PL_retstack_max = c->retstack_max;
301	#endif
302	PL_curpm = c->curpm;
303	PL_curcop = c->curcop;
304	PL_top_env = c->top_env;
305		303
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	306	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		307	if (c->irssv)
		308	{
		309	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
		310	SvREFCNT_dec (c->irssv);
		311	else
		312	{
		313	REPLACE_SV (PL_rs, c->irssv);
		314	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		315	sv_setsv (c->irssv_sv, PL_rs);
		316	}
		317	}
309		318
310	{	319	{
311	dSP;	320	dSP;
312	CV *cv;	321	CV *cv;
313		322
314	/* now do the ugly restore mess */	323	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	324	while ((cv = (CV *)POPs))
316	{	325	{
317	AV padlist = (AV )POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	326	put_padlist (cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	327	CvDEPTH (cv) = PTR2IV (POPs);
323	}	328	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	329	}
327		330
328	PUTBACK;	331	PUTBACK;
329	}	332	}
330	}	333	}
331		334
332	static void	335	static void
333	save_state(pTHX_ Coro__State c, int flags)	336	save_perl (Coro__State c)
334	{	337	{
335	{	338	{
336	dSP;	339	dSP;
337	I32 cxix = cxstack_ix;	340	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	341	PERL_CONTEXT *ccstk = cxstack;
…		…
349	{	352	{
350	while (cxix >= 0)	353	while (cxix >= 0)
351	{	354	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	355	PERL_CONTEXT *cx = &ccstk[cxix--];
353		356
354	if (CxTYPE(cx) == CXt_SUB)	357	if (CxTYPE (cx) == CXt_SUB)
355	{	358	{
356	CV *cv = cx->blk_sub.cv;	359	CV *cv = cx->blk_sub.cv;
		360
357	if (CvDEPTH(cv))	361	if (CvDEPTH (cv))
358	{	362	{
359	EXTEND (SP, CvDEPTH(cv)*2);	363	EXTEND (SP, 3);
360		364
361	while (--CvDEPTH(cv))
362	{
363	/* this tells the restore code to increment CvDEPTH */
364	PUSHs (Nullsv);
365	PUSHs ((SV *)cv);
366	}
367
368	PUSHs ((SV *)CvPADLIST(cv));	365	PUSHs ((SV *)CvPADLIST (cv));
		366	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	367	PUSHs ((SV *)cv);
370		368
		369	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	370	get_padlist (cv);
372	}	371	}
373	}	372	}
374	#ifdef CXt_FORMAT	373	#ifdef CXt_FORMAT
375	else if (CxTYPE(cx) == CXt_FORMAT)	374	else if (CxTYPE (cx) == CXt_FORMAT)
376	{	375	{
377	/* I never used formats, so how should I know how these are implemented? */	376	/* I never used formats, so how should I know how these are implemented? */
378	/* my bold guess is as a simple, plain sub... */	377	/* my bold guess is as a simple, plain sub... */
379	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	378	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380	}	379	}
…		…
390	}	389	}
391		390
392	PUTBACK;	391	PUTBACK;
393	}	392	}
394		393
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	394	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	395	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	396	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		397	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
398		398
399	c->dowarn = PL_dowarn;	399	#define VAR(name,type)c->name = PL_ ## name;
400	c->in_eval = PL_in_eval;	400	# include "state.h"
401		401	#undef VAR
402	c->curstackinfo = PL_curstackinfo;
403	c->curstack = PL_curstack;
404	c->mainstack = PL_mainstack;
405	c->stack_sp = PL_stack_sp;
406	c->op = PL_op;
407	c->curpad = PL_curpad;
408	c->comppad = PL_comppad;
409	c->compcv = PL_compcv;
410	c->stack_base = PL_stack_base;
411	c->stack_max = PL_stack_max;
412	c->tmps_stack = PL_tmps_stack;
413	c->tmps_floor = PL_tmps_floor;
414	c->tmps_ix = PL_tmps_ix;
415	c->tmps_max = PL_tmps_max;
416	c->markstack = PL_markstack;
417	c->markstack_ptr = PL_markstack_ptr;
418	c->markstack_max = PL_markstack_max;
419	c->scopestack = PL_scopestack;
420	c->scopestack_ix = PL_scopestack_ix;
421	c->scopestack_max = PL_scopestack_max;
422	c->savestack = PL_savestack;
423	c->savestack_ix = PL_savestack_ix;
424	c->savestack_max = PL_savestack_max;
425	#if PERL_VERSION < 9
426	c->retstack = PL_retstack;
427	c->retstack_ix = PL_retstack_ix;
428	c->retstack_max = PL_retstack_max;
429	#endif
430	c->curpm = PL_curpm;
431	c->curcop = PL_curcop;
432	c->top_env = PL_top_env;
433	}	402	}
434		403
435	/*	404	/*
436	* allocate various perl stacks. This is an exact copy	405	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	406	* of perl.c:init_stacks, except that it uses less memory
438	* on the (sometimes correct) assumption that coroutines do	407	* on the (sometimes correct) assumption that coroutines do
439	* not usually need a lot of stackspace.	408	* not usually need a lot of stackspace.
440	*/	409	*/
441	static void	410	static void
442	coro_init_stacks (pTHX)	411	coro_init_stacks ()
443	{	412	{
444	LOCK;
445
446	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	413	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
447	PL_curstackinfo->si_type = PERLSI_MAIN;	414	PL_curstackinfo->si_type = PERLSI_MAIN;
448	PL_curstack = PL_curstackinfo->si_stack;	415	PL_curstack = PL_curstackinfo->si_stack;
449	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	416	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
450		417
451	PL_stack_base = AvARRAY(PL_curstack);	418	PL_stack_base = AvARRAY(PL_curstack);
452	PL_stack_sp = PL_stack_base;	419	PL_stack_sp = PL_stack_base;
453	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	420	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
454		421
455	New(50,PL_tmps_stack,96,SV*);	422	New(50,PL_tmps_stack,128,SV*);
456	PL_tmps_floor = -1;	423	PL_tmps_floor = -1;
457	PL_tmps_ix = -1;	424	PL_tmps_ix = -1;
458	PL_tmps_max = 96;	425	PL_tmps_max = 128;
459		426
460	New(54,PL_markstack,16,I32);	427	New(54,PL_markstack,32,I32);
461	PL_markstack_ptr = PL_markstack;	428	PL_markstack_ptr = PL_markstack;
462	PL_markstack_max = PL_markstack + 16;	429	PL_markstack_max = PL_markstack + 32;
463		430
464	#ifdef SET_MARK_OFFSET	431	#ifdef SET_MARK_OFFSET
465	SET_MARK_OFFSET;	432	SET_MARK_OFFSET;
466	#endif	433	#endif
467		434
468	New(54,PL_scopestack,16,I32);	435	New(54,PL_scopestack,32,I32);
469	PL_scopestack_ix = 0;	436	PL_scopestack_ix = 0;
470	PL_scopestack_max = 16;	437	PL_scopestack_max = 32;
471		438
472	New(54,PL_savestack,96,ANY);	439	New(54,PL_savestack,64,ANY);
473	PL_savestack_ix = 0;	440	PL_savestack_ix = 0;
474	PL_savestack_max = 96;	441	PL_savestack_max = 64;
475		442
476	#if PERL_VERSION < 9	443	#if !PERL_VERSION_ATLEAST (5,9,0)
477	New(54,PL_retstack,8,OP*);	444	New(54,PL_retstack,16,OP*);
478	PL_retstack_ix = 0;	445	PL_retstack_ix = 0;
479	PL_retstack_max = 8;	446	PL_retstack_max = 16;
480	#endif	447	#endif
481
482	UNLOCK;
483	}	448	}
484		449
485	/*	450	/*
486	* destroy the stacks, the callchain etc...	451	* destroy the stacks, the callchain etc...
487	*/	452	*/
488	static void	453	static void
489	destroy_stacks(pTHX)	454	coro_destroy_stacks ()
490	{	455	{
491	if (!IN_DESTRUCT)	456	if (!IN_DESTRUCT)
492	{	457	{
493	/* is this ugly, I ask? */	458	/* is this ugly, I ask? */
494	LEAVE_SCOPE (0);	459	LEAVE_SCOPE (0);
…		…
525		490
526	Safefree (PL_tmps_stack);	491	Safefree (PL_tmps_stack);
527	Safefree (PL_markstack);	492	Safefree (PL_markstack);
528	Safefree (PL_scopestack);	493	Safefree (PL_scopestack);
529	Safefree (PL_savestack);	494	Safefree (PL_savestack);
530	#if PERL_VERSION < 9	495	#if !PERL_VERSION_ATLEAST (5,9,0)
531	Safefree (PL_retstack);	496	Safefree (PL_retstack);
532	#endif	497	#endif
533	}	498	}
534		499
535	static void	500	static void
536	allocate_stack (Coro__State ctx, int alloc)	501	setup_coro (struct coro *coro)
537	{
538	coro_stack *stack;
539
540	New (0, stack, 1, coro_stack);
541
542	stack->refcnt = 1;
543	stack->usecnt = 1;
544	stack->gencnt = ctx->gencnt = 0;
545
546	if (alloc)
547	{
548	#if HAVE_MMAP
549	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
551	if (stack->sptr != (void *)-1)
552	{
553	# if STACKGUARD
554	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
555	# endif
556	}
557	else
558	#endif
559	{
560	stack->ssize = - (STACKSIZE * (long)sizeof (long));
561	New (0, stack->sptr, STACKSIZE, long);
562	}
563	}
564	else
565	stack->sptr = 0;
566
567	ctx->stack = stack;
568	}
569
570	static void
571	deallocate_stack (Coro__State ctx)
572	{
573	coro_stack *stack = ctx->stack;
574
575	ctx->stack = 0;
576
577	if (stack)
578	{
579	if (!--stack->refcnt)
580	{
581	#ifdef HAVE_MMAP
582	if (stack->ssize > 0 && stack->sptr)
583	munmap (stack->sptr, stack->ssize);
584	else
585	#endif
586	Safefree (stack->sptr);
587
588	Safefree (stack);
589	}
590	else if (ctx->gencnt == stack->gencnt)
591	--stack->usecnt;
592	}
593	}
594
595	static void
596	setup_coro (void *arg)
597	{	502	{
598	/*	503	/*
599	* emulate part of the perl startup here.	504	* emulate part of the perl startup here.
600	*/	505	*/
601	dTHX;
602	dSP;
603	Coro__State ctx = (Coro__State)arg;
604	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
605		506
606	coro_init_stacks (aTHX);	507	coro_init_stacks ();
607	/PL_curcop = 0;/	508
608	/PL_in_eval = PL_in_eval;/ /* inherit */	509	PL_curcop = &PL_compiling;
		510	PL_in_eval = EVAL_NULL;
		511	PL_curpm = 0;
		512	PL_localizing = 0;
		513	PL_dirty = 0;
		514	PL_restartop = 0;
		515
		516	{
		517	dSP;
		518	LOGOP myop;
		519
609	SvREFCNT_dec (GvAV (PL_defgv));	520	SvREFCNT_dec (GvAV (PL_defgv));
610	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	521	GvAV (PL_defgv) = coro->args; coro->args = 0;
611		522
612	SPAGAIN;
613
614	if (ctx->stack)
615	{
616	ctx->cursp = 0;
617
618	PUSHMARK(SP);
619	PUTBACK;
620	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
621
622	if (SvTRUE (ERRSV))
623	croak (NULL);
624	else
625	croak ("FATAL: CCTXT coroutine returned!");
626	}
627	else
628	{
629	UNOP myop;
630
631	Zero(&myop, 1, UNOP);	523	Zero (&myop, 1, LOGOP);
632	myop.op_next = Nullop;	524	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;	525	myop.op_flags = OPf_WANT_VOID;
634		526
		527	PUSHMARK (SP);
		528	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		529	PUTBACK;
635	PL_op = (OP *)&myop;	530	PL_op = (OP *)&myop;
636
637	PUSHMARK(SP);
638	XPUSHs (sub_init);
639	/*
640	* the next line is slightly wrong, as PL_op->op_next
641	* is actually being executed so we skip the first op.
642	* that doesn't matter, though, since it is only
643	* pp_nextstate and we never return...
644	* ah yes, and I don't care anyways ;)
645	*/
646	PUTBACK;
647	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	531	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
648	SPAGAIN;	532	SPAGAIN;
		533	}
649		534
650	ENTER; /* necessary e.g. for dounwind */	535	ENTER; /* necessary e.g. for dounwind */
651	}
652	}	536	}
653		537
654	static void	538	static void
655	continue_coro (void *arg)	539	free_coro_mortal ()
656	{	540	{
657	/*
658	* this is a _very_ stripped down perl interpreter ;)
659	*/
660	dTHX;
661	Coro__State ctx = (Coro__State)arg;
662
663	PL_top_env = &PL_start_env;
664
665	ctx->cursp = 0;
666	PL_op = PL_op->op_next;
667	CALLRUNOPS(aTHX);
668
669	abort ();
670	}
671
672	static void
673	transfer (pTHX_ struct coro prev, struct coro next, int flags)
674	{
675	dSTACKLEVEL;
676
677	if (prev != next)
678	{
679	/* has this coro been created yet? */
680	if (next->mainstack)
681	{
682	LOCK;
683	SAVE (prev, flags);
684	LOAD (next);
685	UNLOCK;
686
687	/* mark this state as in-use */
688	next->mainstack = 0;
689	next->tmps_ix = -2;
690
691	/* stacklevel changed? if yes, grab the stack for us! */
692	if (flags & TRANSFER_SAVE_CCTXT)
693	{
694	if (!prev->stack)
695	allocate_stack (prev, 0);
696	else if (prev->cursp != stacklevel
697	&& prev->stack->usecnt > 1)
698	{
699	prev->gencnt = ++prev->stack->gencnt;
700	prev->stack->usecnt = 1;
701	}
702
703	/* has our stack been invalidated? */
704	if (next->stack && next->stack->gencnt != next->gencnt)
705	{
706	deallocate_stack (next);
707	allocate_stack (next, 1);
708	coro_create (&(next->stack->cctx),
709	continue_coro, (void *)next,
710	next->stack->sptr, labs (next->stack->ssize));
711	}
712
713	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
714	prev->cursp = stacklevel;
715	/* don't add any code here */
716	}
717	else
718	next->cursp = stacklevel;
719	}
720	else if (next->tmps_ix == -2)
721	croak ("tried to transfer to running coroutine");
722	else
723	{
724	LOCK;
725	SAVE (prev, -1); /* first get rid of the old state */
726	UNLOCK;
727
728	/* create the coroutine for the first time */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733
734	/* the new coroutine starts with start_env again */
735	PL_top_env = &PL_start_env;
736
737	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
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)	541	if (coro_mortal)
769	{	542	{
770	SvREFCNT_dec (coro_mortal);	543	SvREFCNT_dec (coro_mortal);
771	coro_mortal = 0;	544	coro_mortal = 0;
772	}	545	}
		546	}
		547
		548	/* inject a fake call to Coro::State::_cctx_init into the execution */
		549	static void NOINLINE
		550	prepare_cctx (coro_cctx *cctx)
		551	{
		552	dSP;
		553	LOGOP myop;
		554
		555	Zero (&myop, 1, LOGOP);
		556	myop.op_next = PL_op;
		557	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		558
		559	PUSHMARK (SP);
		560	EXTEND (SP, 2);
		561	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		562	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		563	PUTBACK;
		564	PL_op = (OP *)&myop;
		565	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		566	SPAGAIN;
		567	}
		568
		569	static void
		570	coro_run (void *arg)
		571	{
		572	/* coro_run is the alternative tail of transfer(), so unlock here. */
773	UNLOCK;	573	UNLOCK;
774	}
775		574
776	#define SV_CORO(sv,func) \	575	/*
777	do { \	576	* this is a _very_ stripped down perl interpreter ;)
778	if (SvROK (sv)) \	577	*/
779	sv = SvRV (sv); \	578	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		579
797	#define SvSTATE(sv) INT2PTR (struct coro *, SvIVX (sv))	580	/* inject call to cctx_init */
		581	prepare_cctx ((coro_cctx *)arg);
798		582
		583	/* somebody will hit me for both perl_run and PL_restartop */
		584	PL_restartop = PL_op;
		585	perl_run (PL_curinterp);
		586
		587	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		588	abort ();
		589	}
		590
		591	static coro_cctx *
		592	cctx_new ()
		593	{
		594	coro_cctx *cctx;
		595
		596	++cctx_count;
		597
		598	New (0, cctx, 1, coro_cctx);
		599
		600	#if HAVE_MMAP
		601
		602	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		603	/* mmap supposedly does allocate-on-write for us */
		604	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		605
		606	if (cctx->sptr == (void *)-1)
		607	{
		608	perror ("FATAL: unable to mmap stack for coroutine");
		609	_exit (EXIT_FAILURE);
		610	}
		611
		612	# if STACKGUARD
		613	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		614	# endif
		615
		616	#else
		617
		618	cctx->ssize = STACKSIZE * (long)sizeof (long);
		619	New (0, cctx->sptr, STACKSIZE, long);
		620
		621	if (!cctx->sptr)
		622	{
		623	perror ("FATAL: unable to malloc stack for coroutine");
		624	_exit (EXIT_FAILURE);
		625	}
		626
		627	#endif
		628
		629	#if USE_VALGRIND
		630	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		631	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		632	cctx->ssize + (char *)cctx->sptr
		633	);
		634	#endif
		635
		636	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		637
		638	return cctx;
		639	}
		640
		641	static void
		642	cctx_destroy (coro_cctx *cctx)
		643	{
		644	if (!cctx)
		645	return;
		646
		647	--cctx_count;
		648
		649	#if USE_VALGRIND
		650	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		651	#endif
		652
		653	#if HAVE_MMAP
		654	munmap (cctx->sptr, cctx->ssize);
		655	#else
		656	Safefree (cctx->sptr);
		657	#endif
		658
		659	Safefree (cctx);
		660	}
		661
		662	static coro_cctx *
		663	cctx_get ()
		664	{
		665	coro_cctx *cctx;
		666
		667	if (cctx_first)
		668	{
		669	cctx = cctx_first;
		670	cctx_first = cctx->next;
		671	--cctx_idle;
		672	}
		673	else
		674	{
		675	cctx = cctx_new ();
		676	PL_op = PL_op->op_next;
		677	}
		678
		679	return cctx;
		680	}
		681
		682	static void
		683	cctx_put (coro_cctx *cctx)
		684	{
		685	/* free another cctx if overlimit */
		686	if (cctx_idle >= MAX_IDLE_CCTX)
		687	{
		688	coro_cctx *first = cctx_first;
		689	cctx_first = first->next;
		690	--cctx_idle;
		691
		692	assert (!first->inuse);
		693	cctx_destroy (first);
		694	}
		695
		696	++cctx_idle;
		697	cctx->next = cctx_first;
		698	cctx_first = cctx;
		699	}
		700
		701	/* never call directly, always through the coro_state_transfer global variable */
		702	static void NOINLINE
		703	transfer (struct coro prev, struct coro next)
		704	{
		705	dSTACKLEVEL;
		706
		707	/* sometimes transfer is only called to set idle_sp */
		708	if (!next)
		709	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		710	else if (prev != next)
		711	{
		712	coro_cctx *prev__cctx;
		713
		714	if (prev->flags & CF_NEW)
		715	{
		716	/* create a new empty context */
		717	Newz (0, prev->cctx, 1, coro_cctx);
		718	prev->cctx->inuse = 1;
		719	prev->flags &= ~CF_NEW;
		720	prev->flags \|= CF_RUNNING;
		721	}
		722
		723	/TODO: must not croak here /
		724	if (!prev->flags & CF_RUNNING)
		725	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		726
		727	if (next->flags & CF_RUNNING)
		728	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		729
		730	prev->flags &= ~CF_RUNNING;
		731	next->flags \|= CF_RUNNING;
		732
		733	LOCK;
		734
		735	if (next->flags & CF_NEW)
		736	{
		737	/* need to start coroutine */
		738	next->flags &= ~CF_NEW;
		739	/* first get rid of the old state */
		740	save_perl (prev);
		741	/* setup coroutine call */
		742	setup_coro (next);
		743	/* need a new stack */
		744	assert (!next->stack);
		745	}
		746	else
		747	{
		748	/* coroutine already started */
		749	save_perl (prev);
		750	load_perl (next);
		751	}
		752
		753	prev__cctx = prev->cctx;
		754
		755	/* possibly "free" the cctx */
		756	if (prev__cctx->idle_sp == STACKLEVEL)
		757	{
		758	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		759	assert (PL_top_env == prev__cctx->top_env);
		760
		761	prev->cctx = 0;
		762
		763	cctx_put (prev__cctx);
		764	prev__cctx->inuse = 0;
		765	}
		766
		767	if (!next->cctx)
		768	{
		769	next->cctx = cctx_get ();
		770	assert (!next->cctx->inuse);
		771	next->cctx->inuse = 1;
		772	}
		773
		774	if (prev__cctx != next->cctx)
		775	{
		776	prev__cctx->top_env = PL_top_env;
		777	PL_top_env = next->cctx->top_env;
		778	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		779	}
		780
		781	free_coro_mortal ();
		782
		783	UNLOCK;
		784	}
		785	}
		786
		787	struct transfer_args
		788	{
		789	struct coro prev, next;
		790	};
		791
		792	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
		793
		794	static void
		795	coro_state_destroy (struct coro *coro)
		796	{
		797	if (coro->refcnt--)
		798	return;
		799
		800	if (coro->mainstack && coro->mainstack != main_mainstack)
		801	{
		802	struct coro temp;
		803	Zero (&temp, 1, struct coro);
		804	temp.save = CORO_SAVE_ALL;
		805
		806	if (coro->flags & CF_RUNNING)
		807	croak ("FATAL: tried to destroy currently running coroutine");
		808
		809	save_perl (&temp);
		810	load_perl (coro);
		811
		812	coro_destroy_stacks ();
		813
		814	load_perl (&temp); /* this will get rid of defsv etc.. */
		815
		816	coro->mainstack = 0;
		817	}
		818
		819	cctx_destroy (coro->cctx);
		820	SvREFCNT_dec (coro->args);
		821	Safefree (coro);
		822	}
		823
799	static void	824	static int
		825	coro_state_clear (pTHX_ SV sv, MAGIC mg)
		826	{
		827	struct coro coro = (struct coro )mg->mg_ptr;
		828	mg->mg_ptr = 0;
		829
		830	coro_state_destroy (coro);
		831
		832	return 0;
		833	}
		834
		835	static int
		836	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		837	{
		838	struct coro coro = (struct coro )mg->mg_ptr;
		839
		840	++coro->refcnt;
		841
		842	return 0;
		843	}
		844
		845	static MGVTBL coro_state_vtbl = {
		846	0, 0, 0, 0,
		847	coro_state_clear,
		848	0,
		849	#ifdef MGf_DUP
		850	coro_state_dup,
		851	#else
		852	# define MGf_DUP 0
		853	#endif
		854	};
		855
		856	static struct coro *
		857	SvSTATE (SV *coro)
		858	{
		859	HV *stash;
		860	MAGIC *mg;
		861
		862	if (SvROK (coro))
		863	coro = SvRV (coro);
		864
		865	stash = SvSTASH (coro);
		866	if (stash != coro_stash && stash != coro_state_stash)
		867	{
		868	/* very slow, but rare, check */
		869	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		870	croak ("Coro::State object required");
		871	}
		872
		873	mg = SvMAGIC (coro);
		874	assert (mg->mg_type == PERL_MAGIC_ext);
		875	return (struct coro *)mg->mg_ptr;
		876	}
		877
		878	static void
		879	prepare_transfer (struct transfer_args ta, SV prev_sv, SV *next_sv)
		880	{
		881	ta->prev = SvSTATE (prev_sv);
		882	ta->next = SvSTATE (next_sv);
		883	}
		884
		885	static void
800	api_transfer(pTHX_ SV prev, SV next, int flags)	886	api_transfer (SV prev_sv, SV next_sv)
801	{	887	{
802	SV_CORO (prev, "Coro::transfer");	888	struct transfer_args ta;
803	SV_CORO (next, "Coro::transfer");
804		889
805	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	890	prepare_transfer (&ta, prev_sv, next_sv);
		891	TRANSFER (ta);
		892	}
		893
		894	static int
		895	api_save (SV *coro_sv, int new_save)
		896	{
		897	struct coro *coro = SvSTATE (coro_sv);
		898	int old_save = coro->save;
		899
		900	if (new_save >= 0)
		901	coro->save = new_save;
		902
		903	return old_save;
806	}	904	}
807		905
808	/ Coro ******************************************************************/	906	/ Coro ******************************************************************/
809		907
810	#define PRIO_MAX 3	908	#define PRIO_MAX 3
…		…
813	#define PRIO_LOW -1	911	#define PRIO_LOW -1
814	#define PRIO_IDLE -3	912	#define PRIO_IDLE -3
815	#define PRIO_MIN -4	913	#define PRIO_MIN -4
816		914
817	/* for Coro.pm */	915	/* for Coro.pm */
818	static GV coro_current, coro_idle;	916	static SV *coro_current;
819	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	917	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
820	static int coro_nready;	918	static int coro_nready;
821		919
822	static void	920	static void
823	coro_enq (pTHX_ SV *sv)	921	coro_enq (SV *coro_sv)
824	{	922	{
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);	923	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
839	coro_nready++;	924	coro_nready++;
840	}	925	}
841		926
842	static SV *	927	static SV *
843	coro_deq (pTHX_ int min_prio)	928	coro_deq (int min_prio)
844	{	929	{
845	int prio = PRIO_MAX - PRIO_MIN;	930	int prio = PRIO_MAX - PRIO_MIN;
846		931
847	min_prio -= PRIO_MIN;	932	min_prio -= PRIO_MIN;
848	if (min_prio < 0)	933	if (min_prio < 0)
…		…
856	}	941	}
857		942
858	return 0;	943	return 0;
859	}	944	}
860		945
861	static void	946	static int
862	api_ready (SV *coro)	947	api_ready (SV *coro_sv)
863	{	948	{
864	dTHX;	949	struct coro *coro;
865		950
866	if (SvROK (coro))	951	if (SvROK (coro_sv))
867	coro = SvRV (coro);	952	coro_sv = SvRV (coro_sv);
		953
		954	coro = SvSTATE (coro_sv);
		955
		956	if (coro->flags & CF_READY)
		957	return 0;
		958
		959	#if 0 /* this is actually harmless */
		960	if (coro->flags & CF_RUNNING)
		961	croak ("Coro::ready called on currently running coroutine");
		962	#endif
		963
		964	coro->flags \|= CF_READY;
868		965
869	LOCK;	966	LOCK;
870	coro_enq (aTHX_ SvREFCNT_inc (coro));	967	coro_enq (SvREFCNT_inc (coro_sv));
871	UNLOCK;	968	UNLOCK;
		969
		970	return 1;
		971	}
		972
		973	static int
		974	api_is_ready (SV *coro_sv)
		975	{
		976	return !!SvSTATE (coro_sv)->flags & CF_READY;
		977	}
		978
		979	static void
		980	prepare_schedule (struct transfer_args *ta)
		981	{
		982	SV prev, next;
		983
		984	for (;;)
		985	{
		986	LOCK;
		987	next = coro_deq (PRIO_MIN);
		988	UNLOCK;
		989
		990	if (next)
		991	break;
		992
		993	{
		994	dSP;
		995
		996	ENTER;
		997	SAVETMPS;
		998
		999	PUSHMARK (SP);
		1000	PUTBACK;
		1001	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1002
		1003	FREETMPS;
		1004	LEAVE;
		1005	}
		1006	}
		1007
		1008	prev = SvRV (coro_current);
		1009	SvRV_set (coro_current, next);
		1010
		1011	/* free this only after the transfer */
		1012	LOCK;
		1013	free_coro_mortal ();
		1014	UNLOCK;
		1015	coro_mortal = prev;
		1016
		1017	assert (!SvROK(prev));//D
		1018	assert (!SvROK(next));//D
		1019
		1020	ta->prev = SvSTATE (prev);
		1021	ta->next = SvSTATE (next);
		1022
		1023	assert (ta->next->flags & CF_READY);
		1024	ta->next->flags &= ~CF_READY;
		1025	}
		1026
		1027	static void
		1028	prepare_cede (struct transfer_args *ta)
		1029	{
		1030	api_ready (coro_current);
		1031
		1032	prepare_schedule (ta);
872	}	1033	}
873		1034
874	static void	1035	static void
875	api_schedule (void)	1036	api_schedule (void)
876	{	1037	{
877	dTHX;	1038	struct transfer_args ta;
878		1039
879	SV prev, next;	1040	prepare_schedule (&ta);
880		1041	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	}	1042	}
902		1043
903	static void	1044	static void
904	api_cede (void)	1045	api_cede (void)
905	{	1046	{
906	dTHX;	1047	struct transfer_args ta;
907		1048
908	LOCK;	1049	prepare_cede (&ta);
909	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1050	TRANSFER (ta);
910	UNLOCK;
911
912	api_schedule ();
913	}	1051	}
914		1052
915	MODULE = Coro::State PACKAGE = Coro::State	1053	MODULE = Coro::State PACKAGE = Coro::State
916		1054
917	PROTOTYPES: ENABLE	1055	PROTOTYPES: DISABLE
918		1056
919	BOOT:	1057	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1058	{
921	#ifdef USE_ITHREADS	1059	#ifdef USE_ITHREADS
922	MUTEX_INIT (&coro_mutex);	1060	MUTEX_INIT (&coro_mutex);
923	#endif	1061	#endif
924	BOOT_PAGESIZE;	1062	BOOT_PAGESIZE;
925		1063
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);	1064	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929		1065
930	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1066	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
931	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1067	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
932	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1068	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1069	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
933	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1070	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
934		1071
935	main_mainstack = PL_mainstack;	1072	main_mainstack = PL_mainstack;
936		1073
937	coroapi.ver = CORO_API_VERSION;	1074	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1075	coroapi.transfer = api_transfer;
939	}
940		1076
941	Coro::State	1077	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1078	}
943	SV * args	1079
944	PROTOTYPE: $	1080	SV *
		1081	new (char *klass, ...)
945	CODE:	1082	CODE:
946	Coro__State coro;	1083	{
		1084	struct coro *coro;
		1085	HV *hv;
		1086	int i;
947		1087
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);	1088	Newz (0, coro, 1, struct coro);
		1089	coro->args = newAV ();
		1090	coro->save = CORO_SAVE_ALL;
		1091	coro->flags = CF_NEW;
952		1092
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1093	hv = newHV ();
954	/coro->mainstack = 0; //actual work is done inside transfer /	1094	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
955	/coro->stack = 0;/	1095	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
956		1096
957	RETVAL = coro;	1097	for (i = 1; i < items; i++)
		1098	av_push (coro->args, newSVsv (ST (i)));
		1099	}
958	OUTPUT:	1100	OUTPUT:
959	RETVAL	1101	RETVAL
960		1102
		1103	int
		1104	save (SV *coro, int new_save = -1)
		1105	CODE:
		1106	RETVAL = api_save (coro, new_save);
		1107	OUTPUT:
		1108	RETVAL
		1109
961	void	1110	void
962	transfer(prev, next, flags)	1111	_set_stacklevel (...)
963	SV *prev	1112	ALIAS:
964	SV *next	1113	Coro::State::transfer = 1
965	int flags	1114	Coro::schedule = 2
966	PROTOTYPE: @	1115	Coro::cede = 3
967	CODE:	1116	CODE:
968	PUTBACK;	1117	{
969	SV_CORO (next, "Coro::transfer");	1118	struct transfer_args ta;
970	SV_CORO (prev, "Coro::transfer");	1119
971	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1120	switch (ix)
972	SPAGAIN;	1121	{
		1122	case 0:
		1123	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1124	ta.next = 0;
		1125	break;
		1126
		1127	case 1:
		1128	if (items != 2)
		1129	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1130
		1131	prepare_transfer (&ta, ST (0), ST (1));
		1132	break;
		1133
		1134	case 2:
		1135	prepare_schedule (&ta);
		1136	break;
		1137
		1138	case 3:
		1139	prepare_cede (&ta);
		1140	break;
		1141	}
		1142
		1143	TRANSFER (ta);
		1144	}
973		1145
974	void	1146	void
975	DESTROY(coro)	1147	_clone_state_from (SV dst, SV src)
976	Coro::State coro	1148	CODE:
977	CODE:	1149	{
		1150	struct coro *coro_src = SvSTATE (src);
978		1151
979	if (coro->mainstack && coro->mainstack != main_mainstack)	1152	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
980	{
981	struct coro temp;
982		1153
983	PUTBACK;	1154	++coro_src->refcnt;
984	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1155	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
985	LOAD (aTHX_ coro);	1156	}
986	SPAGAIN;
987
988	destroy_stacks (aTHX);
989
990	LOAD ((&temp)); /* this will get rid of defsv etc.. */
991	SPAGAIN;
992
993	coro->mainstack = 0;
994	}
995
996	deallocate_stack (coro);
997	SvREFCNT_dec (coro->args);
998	Safefree (coro);
999		1157
1000	void	1158	void
1001	_exit(code)	1159	_exit (code)
1002	int code	1160	int code
1003	PROTOTYPE: $	1161	PROTOTYPE: $
1004	CODE:	1162	CODE:
1005	_exit (code);	1163	_exit (code);
1006		1164
1007	MODULE = Coro::State PACKAGE = Coro::Cont	1165	int
		1166	cctx_count ()
		1167	CODE:
		1168	RETVAL = cctx_count;
		1169	OUTPUT:
		1170	RETVAL
1008		1171
1009	void	1172	int
1010	yield(...)	1173	cctx_idle ()
1011	PROTOTYPE: @	1174	CODE:
1012	CODE:	1175	RETVAL = cctx_idle;
1013	SV *yieldstack;	1176	OUTPUT:
1014	SV *sv;	1177	RETVAL
1015	AV *defav = GvAV (PL_defgv);
1016	struct coro prev, next;
1017
1018	yieldstack = *hv_fetch (
1019	(HV *)SvRV (GvSV (coro_current)),
1020	"yieldstack", sizeof ("yieldstack") - 1,
1021	0
1022	);
1023
1024	/* set up @_ -- ugly */
1025	av_clear (defav);
1026	av_fill (defav, items - 1);
1027	while (items--)
1028	av_store (defav, items, SvREFCNT_inc (ST(items)));
1029
1030	sv = av_pop ((AV *)SvRV (yieldstack));
1031	prev = SvSTATE ((SV)SvRV (av_fetch ((AV *)SvRV (sv), 0, 0)));
1032	next = SvSTATE ((SV)SvRV (av_fetch ((AV *)SvRV (sv), 1, 0)));
1033	SvREFCNT_dec (sv);
1034
1035	transfer (aTHX_ prev, next, 0);
1036		1178
1037	MODULE = Coro::State PACKAGE = Coro	1179	MODULE = Coro::State PACKAGE = Coro
1038		1180
1039	BOOT:	1181	BOOT:
1040	{	1182	{
1041	int i;	1183	int i;
		1184
1042	HV *stash = gv_stashpv ("Coro", TRUE);	1185	coro_stash = gv_stashpv ("Coro", TRUE);
1043		1186
1044	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1187	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1045	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1188	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1046	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1189	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1047	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1190	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1048	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1191	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1049	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1192	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1050		1193
1051	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1194	coro_current = get_sv ("Coro::current", FALSE);
1052	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1195	SvREADONLY_on (coro_current);
1053		1196
1054	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1197	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1055	coro_ready[i] = newAV ();	1198	coro_ready[i] = newAV ();
1056		1199
1057	{	1200	{
1058	SV *sv = perl_get_sv("Coro::API", 1);	1201	SV *sv = perl_get_sv("Coro::API", 1);
1059		1202
1060	coroapi.schedule = api_schedule;	1203	coroapi.schedule = api_schedule;
		1204	coroapi.save = api_save;
1061	coroapi.cede = api_cede;	1205	coroapi.cede = api_cede;
1062	coroapi.ready = api_ready;	1206	coroapi.ready = api_ready;
		1207	coroapi.is_ready = api_is_ready;
1063	coroapi.nready = &coro_nready;	1208	coroapi.nready = &coro_nready;
1064	coroapi.current = coro_current;	1209	coroapi.current = coro_current;
1065		1210
1066	GCoroAPI = &coroapi;	1211	GCoroAPI = &coroapi;
1067	sv_setiv (sv, (IV)&coroapi);	1212	sv_setiv (sv, (IV)&coroapi);
1068	SvREADONLY_on (sv);	1213	SvREADONLY_on (sv);
1069	}	1214	}
1070	}	1215	}
1071		1216
1072	#if !PERL_MICRO
1073
1074	void	1217	void
1075	ready(self)	1218	_set_current (SV *current)
1076	SV * self
1077	PROTOTYPE: $	1219	PROTOTYPE: $
1078	CODE:	1220	CODE:
1079	api_ready (self);	1221	SvREFCNT_dec (SvRV (coro_current));
1080		1222	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1081	#endif
1082		1223
1083	int	1224	int
		1225	prio (Coro::State coro, int newprio = 0)
		1226	ALIAS:
		1227	nice = 1
		1228	CODE:
		1229	{
		1230	RETVAL = coro->prio;
		1231
		1232	if (items > 1)
		1233	{
		1234	if (ix)
		1235	newprio += coro->prio;
		1236
		1237	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1238	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1239
		1240	coro->prio = newprio;
		1241	}
		1242	}
		1243
		1244	SV *
		1245	ready (SV *self)
		1246	PROTOTYPE: $
		1247	CODE:
		1248	RETVAL = boolSV (api_ready (self));
		1249	OUTPUT:
		1250	RETVAL
		1251
		1252	SV *
		1253	is_ready (SV *self)
		1254	PROTOTYPE: $
		1255	CODE:
		1256	RETVAL = boolSV (api_is_ready (self));
		1257	OUTPUT:
		1258	RETVAL
		1259
		1260	int
1084	nready(...)	1261	nready (...)
1085	PROTOTYPE:	1262	PROTOTYPE:
1086	CODE:	1263	CODE:
1087	RETVAL = coro_nready;	1264	RETVAL = coro_nready;
1088	OUTPUT:	1265	OUTPUT:
1089	RETVAL	1266	RETVAL
1090		1267
1091	void	1268	MODULE = Coro::State PACKAGE = Coro::AIO
1092	schedule(...)	1269
1093	PROTOTYPE:	1270	SV *
		1271	_get_state ()
1094	CODE:	1272	CODE:
1095	api_schedule ();
1096
1097	void
1098	cede(...)
1099	PROTOTYPE:
1100	CODE:
1101	api_cede ();
1102
1103	# and these are hacks
1104	SV *
1105	_aio_get_state ()
1106	CODE:
1107	{	1273	{
1108	struct {	1274	struct io_state *data;
1109	int errorno;
1110	int laststype;
1111	int laststatval;
1112	Stat_t statcache;
1113	} data;
1114		1275
		1276	RETVAL = newSV (sizeof (struct io_state));
		1277	data = (struct io_state *)SvPVX (RETVAL);
		1278	SvCUR_set (RETVAL, sizeof (struct io_state));
		1279	SvPOK_only (RETVAL);
		1280
1115	data.errorno = errno;	1281	data->errorno = errno;
1116	data.laststype = PL_laststype;	1282	data->laststype = PL_laststype;
1117	data.laststatval = PL_laststatval;	1283	data->laststatval = PL_laststatval;
1118	data.statcache = PL_statcache;	1284	data->statcache = PL_statcache;
1119
1120	RETVAL = newSVpvn ((char *)&data, sizeof data);
1121	}	1285	}
1122	OUTPUT:	1286	OUTPUT:
1123	RETVAL	1287	RETVAL
1124		1288
1125	void	1289	void
1126	_aio_set_state (char *data_)	1290	_set_state (char *data_)
1127	PROTOTYPE: $	1291	PROTOTYPE: $
1128	CODE:	1292	CODE:
1129	{	1293	{
1130	struct {	1294	struct io_state data = (void )data_;
1131	int errorno;
1132	int laststype;
1133	int laststatval;
1134	Stat_t statcache;
1135	} data = (void )data_;
1136		1295
1137	errno = data->errorno;	1296	errno = data->errorno;
1138	PL_laststype = data->laststype;	1297	PL_laststype = data->laststype;
1139	PL_laststatval = data->laststatval;	1298	PL_laststatval = data->laststatval;
1140	PL_statcache = data->statcache;	1299	PL_statcache = data->statcache;
1141	}	1300	}
		1301

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Comparing Coro/Coro/State.xs (file contents): Revision 1.83 by root, Mon Nov 20 22:32:44 2006 UTC vs. Revision 1.123 by root, Mon Dec 4 21:56:00 2006 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.83 by root, Mon Nov 20 22:32:44 2006 UTC vs.
Revision 1.123 by root, Mon Dec 4 21:56:00 2006 UTC