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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.93 by root, Sun Nov 26 03:22:50 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
54	# ifndef PAGESIZE	65	# ifndef PAGESIZE
55	# define PAGESIZE pagesize	66	# define PAGESIZE pagesize
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)	67	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;	68	static long pagesize;
58	# else	69	# else
59	# define BOOT_PAGESIZE	70	# define BOOT_PAGESIZE (void)0
60	# endif	71	# endif
		72	#else
		73	# define PAGESIZE 0
		74	# define BOOT_PAGESIZE (void)0
61	#endif	75	#endif
62		76
63	/* 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
64	* 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
65	* and should be unique. */	79	* and should be unique. */
66	#define dSTACKLEVEL int stacklevel	80	#define dSTACKLEVEL int stacklevel
67	#define STACKLEVEL ((void *)&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
75	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
76		94
77	#ifdef USE_ITHREADS	95	#ifdef USE_ITHREADS
78	static perl_mutex coro_mutex;	96	static perl_mutex coro_mutex;
79	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	97	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
80	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	98	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
81	#else	99	#else
82	# define LOCK (void)0	100	# define LOCK (void)0
83	# define UNLOCK (void)0	101	# define UNLOCK (void)0
84	#endif	102	#endif
85		103
		104	struct io_state
		105	{
		106	int errorno;
		107	I32 laststype;
		108	int laststatval;
		109	Stat_t statcache;
		110	};
		111
86	static struct CoroAPI coroapi;	112	static struct CoroAPI coroapi;
87	static AV main_mainstack; / used to differentiate between $main and others */	113	static AV main_mainstack; / used to differentiate between $main and others */
88	static HV coro_state_stash, coro_stash;	114	static HV coro_state_stash, coro_stash;
89	static SV coro_mortal; / will be freed after next transfer */	115	static SV coro_mortal; / will be freed after next transfer */
90		116
		117	static struct coro_cctx *cctx_first;
		118	static int cctx_count, cctx_idle;
		119
91	/* this is a structure representing a c-level coroutine */	120	/* this is a structure representing a c-level coroutine */
92	typedef struct coro_stack {	121	typedef struct coro_cctx {
93	struct coro_stack *next;	122	struct coro_cctx *next;
94		123
95	/* the stack */	124	/* the stack */
96	void *sptr;	125	void *sptr;
97	long ssize; /* positive == mmap, otherwise malloc */	126	long ssize; /* positive == mmap, otherwise malloc */
98		127
99	/* cpu state */	128	/* cpu state */
100	void idle_sp; / original stacklevel when coroutine was created */	129	void idle_sp; / sp of top-level transfer/schedule/cede call */
101	JMPENV *top_env;	130	JMPENV *top_env;
102	coro_context cctx;	131	coro_context cctx;
103	} coro_stack;
104		132
105	/* the (fake) coro_stack representing the main program */	133	int inuse;
106	static coro_stack *main_stack;	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	};
107		145
108	/* this is a structure representing a perl-level coroutine */	146	/* this is a structure representing a perl-level coroutine */
109	struct coro {	147	struct coro {
110	/* the c coroutine allocated to this perl coroutine, if any */	148	/* the c coroutine allocated to this perl coroutine, if any */
111	coro_stack *stack;	149	coro_cctx *cctx;
112		150
113	/* data associated with this coroutine (initial args) */	151	/* data associated with this coroutine (initial args) */
114	AV *args;	152	AV *args;
115	int refcnt;	153	int refcnt;
		154	int save; /* CORO_SAVE flags */
		155	int flags; /* CF_ flags */
116		156
117	/* optionally saved, might be zero */	157	/* optionally saved, might be zero */
118	AV *defav;	158	AV defav; / @_ */
119	SV *defsv;	159	SV defsv; / $_ */
120	SV *errsv;	160	SV errsv; / $@ */
		161	SV irssv; / $/ */
		162	SV irssv_sv; / real $/ cache */
121		163
122	/* saved global state not related to stacks */	164	#define VAR(name,type) type name;
123	U8 dowarn;	165	# include "state.h"
124	I32 in_eval;	166	#undef VAR
125
126	/* the stacks and related info (callchain etc..) */
127	PERL_SI *curstackinfo;
128	AV *curstack;
129	AV *mainstack;
130	SV **stack_sp;
131	OP *op;
132	SV **curpad;
133	AV *comppad;
134	CV *compcv;
135	SV **stack_base;
136	SV **stack_max;
137	SV **tmps_stack;
138	I32 tmps_floor;
139	I32 tmps_ix;
140	I32 tmps_max;
141	I32 *markstack;
142	I32 *markstack_ptr;
143	I32 *markstack_max;
144	I32 *scopestack;
145	I32 scopestack_ix;
146	I32 scopestack_max;
147	ANY *savestack;
148	I32 savestack_ix;
149	I32 savestack_max;
150	OP **retstack;
151	I32 retstack_ix;
152	I32 retstack_max;
153	PMOP *curpm;
154	COP *curcop;
155		167
156	/* coro process data */	168	/* coro process data */
157	int prio;	169	int prio;
158	};	170	};
159		171
160	typedef struct coro *Coro__State;	172	typedef struct coro *Coro__State;
161	typedef struct coro *Coro__State_or_hashref;	173	typedef struct coro *Coro__State_or_hashref;
162		174
163	static AV *	175	static AV *
164	coro_clone_padlist (pTHX_ CV *cv)	176	coro_clone_padlist (CV *cv)
165	{	177	{
166	AV *padlist = CvPADLIST (cv);	178	AV *padlist = CvPADLIST (cv);
167	AV newpadlist, newpad;	179	AV newpadlist, newpad;
168		180
169	newpadlist = newAV ();	181	newpadlist = newAV ();
170	AvREAL_off (newpadlist);	182	AvREAL_off (newpadlist);
171	#if PERL_VERSION < 9	183	#if PERL_VERSION_ATLEAST (5,9,0)
		184	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		185	#else
172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	186	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
173	#else
174	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
175	#endif	187	#endif
176	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	188	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
177	--AvFILLp (padlist);	189	--AvFILLp (padlist);
178		190
179	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	191	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
181		193
182	return newpadlist;	194	return newpadlist;
183	}	195	}
184		196
185	static void	197	static void
186	free_padlist (pTHX_ AV *padlist)	198	free_padlist (AV *padlist)
187	{	199	{
188	/* may be during global destruction */	200	/* may be during global destruction */
189	if (SvREFCNT (padlist))	201	if (SvREFCNT (padlist))
190	{	202	{
191	I32 i = AvFILLp (padlist);	203	I32 i = AvFILLp (padlist);
…		…
212	AV *padlist;	224	AV *padlist;
213	AV av = (AV )mg->mg_obj;	225	AV av = (AV )mg->mg_obj;
214		226
215	/* casting is fun. */	227	/* casting is fun. */
216	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	228	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
217	free_padlist (aTHX_ padlist);	229	free_padlist (padlist);
218		230
219	SvREFCNT_dec (av);	231	SvREFCNT_dec (av);
220		232
221	return 0;	233	return 0;
222	}	234	}
223		235
224	#define PERL_MAGIC_coro PERL_MAGIC_ext	236	#define PERL_MAGIC_coro PERL_MAGIC_ext
225		237
226	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	238	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
227		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
228	/* the next two functions merely cache the padlists */	247	/* the next two functions merely cache the padlists */
229	static void	248	static void
230	get_padlist (pTHX_ CV *cv)	249	get_padlist (CV *cv)
231	{	250	{
232	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	251	MAGIC *mg = CORO_MAGIC (cv);
		252	AV *av;
233		253
234	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	254	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
235	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	255	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
236	else	256	else
237	{	257	{
238	#if 0	258	#if 0
239	/* this should work - but it doesn't :( */	259	/* this is probably cleaner, but also slower? */
240	CV *cp = Perl_cv_clone (aTHX_ cv);	260	CV *cp = Perl_cv_clone (cv);
241	CvPADLIST (cv) = CvPADLIST (cp);	261	CvPADLIST (cv) = CvPADLIST (cp);
242	CvPADLIST (cp) = 0;	262	CvPADLIST (cp) = 0;
243	SvREFCNT_dec (cp);	263	SvREFCNT_dec (cp);
244	#else	264	#else
245	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	265	CvPADLIST (cv) = coro_clone_padlist (cv);
246	#endif	266	#endif
247	}	267	}
248	}	268	}
249		269
250	static void	270	static void
251	put_padlist (pTHX_ CV *cv)	271	put_padlist (CV *cv)
252	{	272	{
253	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	273	MAGIC *mg = CORO_MAGIC (cv);
		274	AV *av;
254		275
255	if (!mg)	276	if (!mg)
256	{	277	{
257	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	278	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
258	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	279	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
259	mg->mg_virtual = &vtbl_coro;	280	mg->mg_virtual = &vtbl_coro;
260	mg->mg_obj = (SV *)newAV ();	281	mg->mg_obj = (SV *)newAV ();
261	}	282	}
262		283
263	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);
264	}	290	}
265		291
266	#define SB do {	292	#define SB do {
267	#define SE } while (0)	293	#define SE } while (0)
268		294
269	#define LOAD(state) load_state(aTHX_ (state));
270	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
271
272	#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
273		296
274	static void	297	static void
275	load_state(pTHX_ Coro__State c)	298	load_perl (Coro__State c)
276	{	299	{
277	PL_dowarn = c->dowarn;	300	#define VAR(name,type) PL_ ## name = c->name;
278	PL_in_eval = c->in_eval;	301	# include "state.h"
279		302	#undef VAR
280	PL_curstackinfo = c->curstackinfo;
281	PL_curstack = c->curstack;
282	PL_mainstack = c->mainstack;
283	PL_stack_sp = c->stack_sp;
284	PL_op = c->op;
285	PL_curpad = c->curpad;
286	PL_comppad = c->comppad;
287	PL_compcv = c->compcv;
288	PL_stack_base = c->stack_base;
289	PL_stack_max = c->stack_max;
290	PL_tmps_stack = c->tmps_stack;
291	PL_tmps_floor = c->tmps_floor;
292	PL_tmps_ix = c->tmps_ix;
293	PL_tmps_max = c->tmps_max;
294	PL_markstack = c->markstack;
295	PL_markstack_ptr = c->markstack_ptr;
296	PL_markstack_max = c->markstack_max;
297	PL_scopestack = c->scopestack;
298	PL_scopestack_ix = c->scopestack_ix;
299	PL_scopestack_max = c->scopestack_max;
300	PL_savestack = c->savestack;
301	PL_savestack_ix = c->savestack_ix;
302	PL_savestack_max = c->savestack_max;
303	#if PERL_VERSION < 9
304	PL_retstack = c->retstack;
305	PL_retstack_ix = c->retstack_ix;
306	PL_retstack_max = c->retstack_max;
307	#endif
308	PL_curpm = c->curpm;
309	PL_curcop = c->curcop;
310		303
311	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
312	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
313	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	}
314		318
315	{	319	{
316	dSP;	320	dSP;
317	CV *cv;	321	CV *cv;
318		322
319	/* now do the ugly restore mess */	323	/* now do the ugly restore mess */
320	while ((cv = (CV *)POPs))	324	while ((cv = (CV *)POPs))
321	{	325	{
322	AV padlist = (AV )POPs;
323
324	if (padlist)
325	{
326	put_padlist (aTHX_ cv); /* mark this padlist as available */	326	put_padlist (cv); /* mark this padlist as available */
327	CvPADLIST(cv) = padlist;	327	CvDEPTH (cv) = PTR2IV (POPs);
328	}	328	CvPADLIST (cv) = (AV *)POPs;
329
330	++CvDEPTH(cv);
331	}	329	}
332		330
333	PUTBACK;	331	PUTBACK;
334	}	332	}
335	}	333	}
336		334
337	static void	335	static void
338	save_state(pTHX_ Coro__State c, int flags)	336	save_perl (Coro__State c)
339	{	337	{
340	{	338	{
341	dSP;	339	dSP;
342	I32 cxix = cxstack_ix;	340	I32 cxix = cxstack_ix;
343	PERL_CONTEXT *ccstk = cxstack;	341	PERL_CONTEXT *ccstk = cxstack;
…		…
354	{	352	{
355	while (cxix >= 0)	353	while (cxix >= 0)
356	{	354	{
357	PERL_CONTEXT *cx = &ccstk[cxix--];	355	PERL_CONTEXT *cx = &ccstk[cxix--];
358		356
359	if (CxTYPE(cx) == CXt_SUB)	357	if (CxTYPE (cx) == CXt_SUB)
360	{	358	{
361	CV *cv = cx->blk_sub.cv;	359	CV *cv = cx->blk_sub.cv;
		360
362	if (CvDEPTH(cv))	361	if (CvDEPTH (cv))
363	{	362	{
364	EXTEND (SP, CvDEPTH(cv)*2);	363	EXTEND (SP, 3);
365		364
366	while (--CvDEPTH(cv))
367	{
368	/* this tells the restore code to increment CvDEPTH */
369	PUSHs (Nullsv);
370	PUSHs ((SV *)cv);
371	}
372
373	PUSHs ((SV *)CvPADLIST(cv));	365	PUSHs ((SV *)CvPADLIST (cv));
		366	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
374	PUSHs ((SV *)cv);	367	PUSHs ((SV *)cv);
375		368
		369	CvDEPTH (cv) = 0;
376	get_padlist (aTHX_ cv);	370	get_padlist (cv);
377	}	371	}
378	}	372	}
379	#ifdef CXt_FORMAT	373	#ifdef CXt_FORMAT
380	else if (CxTYPE(cx) == CXt_FORMAT)	374	else if (CxTYPE (cx) == CXt_FORMAT)
381	{	375	{
382	/* 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? */
383	/* my bold guess is as a simple, plain sub... */	377	/* my bold guess is as a simple, plain sub... */
384	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");
385	}	379	}
…		…
395	}	389	}
396		390
397	PUTBACK;	391	PUTBACK;
398	}	392	}
399		393
400	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;
401	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	395	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
402	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;
403		398
404	c->dowarn = PL_dowarn;	399	#define VAR(name,type)c->name = PL_ ## name;
405	c->in_eval = PL_in_eval;	400	# include "state.h"
406		401	#undef VAR
407	c->curstackinfo = PL_curstackinfo;
408	c->curstack = PL_curstack;
409	c->mainstack = PL_mainstack;
410	c->stack_sp = PL_stack_sp;
411	c->op = PL_op;
412	c->curpad = PL_curpad;
413	c->comppad = PL_comppad;
414	c->compcv = PL_compcv;
415	c->stack_base = PL_stack_base;
416	c->stack_max = PL_stack_max;
417	c->tmps_stack = PL_tmps_stack;
418	c->tmps_floor = PL_tmps_floor;
419	c->tmps_ix = PL_tmps_ix;
420	c->tmps_max = PL_tmps_max;
421	c->markstack = PL_markstack;
422	c->markstack_ptr = PL_markstack_ptr;
423	c->markstack_max = PL_markstack_max;
424	c->scopestack = PL_scopestack;
425	c->scopestack_ix = PL_scopestack_ix;
426	c->scopestack_max = PL_scopestack_max;
427	c->savestack = PL_savestack;
428	c->savestack_ix = PL_savestack_ix;
429	c->savestack_max = PL_savestack_max;
430	#if PERL_VERSION < 9
431	c->retstack = PL_retstack;
432	c->retstack_ix = PL_retstack_ix;
433	c->retstack_max = PL_retstack_max;
434	#endif
435	c->curpm = PL_curpm;
436	c->curcop = PL_curcop;
437	}	402	}
438		403
439	/*	404	/*
440	* allocate various perl stacks. This is an exact copy	405	* allocate various perl stacks. This is an exact copy
441	* of perl.c:init_stacks, except that it uses less memory	406	* of perl.c:init_stacks, except that it uses less memory
442	* on the (sometimes correct) assumption that coroutines do	407	* on the (sometimes correct) assumption that coroutines do
443	* not usually need a lot of stackspace.	408	* not usually need a lot of stackspace.
444	*/	409	*/
445	static void	410	static void
446	coro_init_stacks (pTHX)	411	coro_init_stacks ()
447	{	412	{
448	LOCK;
449
450	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	413	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
451	PL_curstackinfo->si_type = PERLSI_MAIN;	414	PL_curstackinfo->si_type = PERLSI_MAIN;
452	PL_curstack = PL_curstackinfo->si_stack;	415	PL_curstack = PL_curstackinfo->si_stack;
453	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	416	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454		417
455	PL_stack_base = AvARRAY(PL_curstack);	418	PL_stack_base = AvARRAY(PL_curstack);
456	PL_stack_sp = PL_stack_base;	419	PL_stack_sp = PL_stack_base;
457	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	420	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458		421
459	New(50,PL_tmps_stack,96,SV*);	422	New(50,PL_tmps_stack,128,SV*);
460	PL_tmps_floor = -1;	423	PL_tmps_floor = -1;
461	PL_tmps_ix = -1;	424	PL_tmps_ix = -1;
462	PL_tmps_max = 96;	425	PL_tmps_max = 128;
463		426
464	New(54,PL_markstack,16,I32);	427	New(54,PL_markstack,32,I32);
465	PL_markstack_ptr = PL_markstack;	428	PL_markstack_ptr = PL_markstack;
466	PL_markstack_max = PL_markstack + 16;	429	PL_markstack_max = PL_markstack + 32;
467		430
468	#ifdef SET_MARK_OFFSET	431	#ifdef SET_MARK_OFFSET
469	SET_MARK_OFFSET;	432	SET_MARK_OFFSET;
470	#endif	433	#endif
471		434
472	New(54,PL_scopestack,16,I32);	435	New(54,PL_scopestack,32,I32);
473	PL_scopestack_ix = 0;	436	PL_scopestack_ix = 0;
474	PL_scopestack_max = 16;	437	PL_scopestack_max = 32;
475		438
476	New(54,PL_savestack,96,ANY);	439	New(54,PL_savestack,64,ANY);
477	PL_savestack_ix = 0;	440	PL_savestack_ix = 0;
478	PL_savestack_max = 96;	441	PL_savestack_max = 64;
479		442
480	#if PERL_VERSION < 9	443	#if !PERL_VERSION_ATLEAST (5,9,0)
481	New(54,PL_retstack,8,OP*);	444	New(54,PL_retstack,16,OP*);
482	PL_retstack_ix = 0;	445	PL_retstack_ix = 0;
483	PL_retstack_max = 8;	446	PL_retstack_max = 16;
484	#endif	447	#endif
485
486	UNLOCK;
487	}	448	}
488		449
489	/*	450	/*
490	* destroy the stacks, the callchain etc...	451	* destroy the stacks, the callchain etc...
491	*/	452	*/
492	static void	453	static void
493	destroy_stacks(pTHX)	454	coro_destroy_stacks ()
494	{	455	{
495	if (!IN_DESTRUCT)	456	if (!IN_DESTRUCT)
496	{	457	{
497	/* is this ugly, I ask? */	458	/* is this ugly, I ask? */
498	LEAVE_SCOPE (0);	459	LEAVE_SCOPE (0);
…		…
529		490
530	Safefree (PL_tmps_stack);	491	Safefree (PL_tmps_stack);
531	Safefree (PL_markstack);	492	Safefree (PL_markstack);
532	Safefree (PL_scopestack);	493	Safefree (PL_scopestack);
533	Safefree (PL_savestack);	494	Safefree (PL_savestack);
534	#if PERL_VERSION < 9	495	#if !PERL_VERSION_ATLEAST (5,9,0)
535	Safefree (PL_retstack);	496	Safefree (PL_retstack);
536	#endif	497	#endif
537	}	498	}
538		499
539	static void	500	static void
540	setup_coro (struct coro *coro)	501	setup_coro (struct coro *coro)
541	{	502	{
542	/*	503	/*
543	* emulate part of the perl startup here.	504	* emulate part of the perl startup here.
544	*/	505	*/
545	dTHX;
546	dSP;
547	UNOP myop;
548	SV sub_init = (SV )get_cv ("Coro::State::coro_init", FALSE);
549		506
550	coro_init_stacks (aTHX);	507	coro_init_stacks ();
551	/PL_curcop = 0;/	508
552	/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
553	SvREFCNT_dec (GvAV (PL_defgv));	520	SvREFCNT_dec (GvAV (PL_defgv));
554	GvAV (PL_defgv) = coro->args; coro->args = 0;	521	GvAV (PL_defgv) = coro->args; coro->args = 0;
555		522
556	SPAGAIN;
557
558	Zero (&myop, 1, UNOP);	523	Zero (&myop, 1, LOGOP);
559	myop.op_next = Nullop;	524	myop.op_next = Nullop;
560	myop.op_flags = OPf_WANT_VOID;	525	myop.op_flags = OPf_WANT_VOID;
561		526
		527	PUSHMARK (SP);
		528	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		529	PUTBACK;
562	PL_op = (OP *)&myop;	530	PL_op = (OP *)&myop;
563
564	PUSHMARK(SP);
565	XPUSHs (sub_init);
566	PUTBACK;
567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	531	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
568	SPAGAIN;	532	SPAGAIN;
		533	}
569		534
570	ENTER; /* necessary e.g. for dounwind */	535	ENTER; /* necessary e.g. for dounwind */
571	}	536	}
572		537
573	static void	538	static void
…		…
578	SvREFCNT_dec (coro_mortal);	543	SvREFCNT_dec (coro_mortal);
579	coro_mortal = 0;	544	coro_mortal = 0;
580	}	545	}
581	}	546	}
582		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
583	static void	569	static void
584	coro_run (void *arg)	570	coro_run (void *arg)
585	{	571	{
		572	/* coro_run is the alternative tail of transfer(), so unlock here. */
		573	UNLOCK;
		574
586	/*	575	/*
587	* this is a _very_ stripped down perl interpreter ;)	576	* this is a _very_ stripped down perl interpreter ;)
588	*/	577	*/
589	dTHX;
590
591	UNLOCK;
592
593	PL_top_env = &PL_start_env;	578	PL_top_env = &PL_start_env;
594		579
595	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));	580	/* inject call to cctx_init */
596	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));	581	prepare_cctx ((coro_cctx *)arg);
597		582
598	/* continue at cctx_init, without entersub */
599	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
600
601	/* somebody will hit me for both perl_run and PL_restart_op */	583	/* somebody will hit me for both perl_run and PL_restartop */
602	perl_run (aTHX_ PERL_GET_CONTEXT);	584	PL_restartop = PL_op;
		585	perl_run (PL_curinterp);
603		586
		587	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
604	abort ();	588	abort ();
605	}	589	}
606		590
607	static coro_stack *	591	static coro_cctx *
608	stack_new ()	592	cctx_new ()
609	{	593	{
610	coro_stack *stack;	594	coro_cctx *cctx;
611		595
		596	++cctx_count;
		597
612	New (0, stack, 1, coro_stack);	598	New (0, cctx, 1, coro_cctx);
613		599
614	#if HAVE_MMAP	600	#if HAVE_MMAP
615		601
616	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	602	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		603	/* mmap supposedly does allocate-on-write for us */
617	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	604	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
618		605
619	if (stack->sptr == (void *)-1)	606	if (cctx->sptr == (void *)-1)
620	{	607	{
621	perror ("FATAL: unable to mmap stack for coroutine");	608	perror ("FATAL: unable to mmap stack for coroutine");
622	_exit (EXIT_FAILURE);	609	_exit (EXIT_FAILURE);
623	}	610	}
624		611
		612	# if STACKGUARD
625	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	613	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		614	# endif
626		615
627	#else	616	#else
628		617
629	stack->ssize = STACKSIZE * (long)sizeof (long);	618	cctx->ssize = STACKSIZE * (long)sizeof (long);
630	New (0, stack->sptr, STACKSIZE, long);	619	New (0, cctx->sptr, STACKSIZE, long);
631		620
632	if (!stack->sptr)	621	if (!cctx->sptr)
633	{	622	{
634	perror (stderr, "FATAL: unable to malloc stack for coroutine");	623	perror ("FATAL: unable to malloc stack for coroutine");
635	_exit (EXIT_FAILURE);	624	_exit (EXIT_FAILURE);
636	}	625	}
637		626
638	#endif	627	#endif
639		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
640	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	636	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
641		637
642	return stack;	638	return cctx;
643	}	639	}
644		640
645	static void	641	static void
646	stack_free (coro_stack *stack)	642	cctx_destroy (coro_cctx *cctx)
647	{	643	{
648	if (!stack \|\| stack == main_stack)	644	if (!cctx)
649	return;	645	return;
650		646
		647	--cctx_count;
		648
		649	#if USE_VALGRIND
		650	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		651	#endif
		652
651	#if HAVE_MMAP	653	#if HAVE_MMAP
652	munmap (stack->sptr, stack->ssize);	654	munmap (cctx->sptr, cctx->ssize);
653	#else	655	#else
654	Safefree (stack->sptr);	656	Safefree (cctx->sptr);
655	#endif	657	#endif
656		658
657	Safefree (stack);	659	Safefree (cctx);
658	}	660	}
659		661
660	static coro_stack *stack_first;
661
662	static coro_stack *	662	static coro_cctx *
663	stack_get ()	663	cctx_get ()
664	{	664	{
665	coro_stack *stack;	665	coro_cctx *cctx;
666		666
667	if (stack_first)	667	if (cctx_first)
668	{	668	{
669	stack = stack_first;	669	cctx = cctx_first;
670	stack_first = stack->next;	670	cctx_first = cctx->next;
		671	--cctx_idle;
671	}	672	}
672	else	673	else
673	{	674	{
674	stack = stack_new ();	675	cctx = cctx_new ();
675	PL_op = PL_op->op_next;	676	PL_op = PL_op->op_next;
676	}	677	}
677		678
678	return stack;	679	return cctx;
679	}	680	}
680		681
681	static void	682	static void
682	stack_put (coro_stack *stack)	683	cctx_put (coro_cctx *cctx)
683	{	684	{
684	stack->next = stack_first;	685	/* free another cctx if overlimit */
685	stack_first = stack;	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;
686	}	699	}
687		700
688	/* never call directly, always through the coro_state_transfer global variable */	701	/* never call directly, always through the coro_state_transfer global variable */
689	static void	702	static void NOINLINE
690	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)	703	transfer (struct coro prev, struct coro next)
691	{	704	{
692	dSTACKLEVEL;	705	dSTACKLEVEL;
693		706
694	/* sometimes transfer is only called to set idle_sp */	707	/* sometimes transfer is only called to set idle_sp */
695	if (flags == TRANSFER_SET_STACKLEVEL)	708	if (!next)
696	((coro_stack *)prev)->idle_sp = STACKLEVEL;	709	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
697	else if (prev != next)	710	else if (prev != next)
698	{	711	{
699	coro_stack *prev__stack;	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;
700		732
701	LOCK;	733	LOCK;
702		734
703	if (next->mainstack)	735	if (next->flags & CF_NEW)
704	{	736	{
705	/* coroutine already started */	737	/* need to start coroutine */
706	SAVE (prev, flags);	738	next->flags &= ~CF_NEW;
707	LOAD (next);	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);
708	}	745	}
709	else	746	else
710	{	747	{
711	/* need to start coroutine */	748	/* coroutine already started */
712	/* first get rid of the old state */	749	save_perl (prev);
713	SAVE (prev, -1);	750	load_perl (next);
714	/* setup coroutine call */
715	setup_coro (next);
716	/* need a stack */
717	next->stack = 0;
718	}	751	}
719		752
720	prev__stack = prev->stack;	753	prev__cctx = prev->cctx;
721		754
722	/* possibly "free" the stack */	755	/* possibly "free" the cctx */
723	if (prev__stack->idle_sp == STACKLEVEL)	756	if (prev__cctx->idle_sp == STACKLEVEL)
724	{	757	{
725	stack_put (prev__stack);	758	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		759	assert (PL_top_env == prev__cctx->top_env);
		760
726	prev->stack = 0;	761	prev->cctx = 0;
		762
		763	cctx_put (prev__cctx);
		764	prev__cctx->inuse = 0;
727	}	765	}
728		766
729	if (!next->stack)	767	if (!next->cctx)
730	next->stack = stack_get ();
731
732	if (prev__stack != next->stack)
733	{	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	{
734	prev__stack->top_env = PL_top_env;	776	prev__cctx->top_env = PL_top_env;
735	PL_top_env = next->stack->top_env;	777	PL_top_env = next->cctx->top_env;
736	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	778	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
737	}	779	}
738		780
739	free_coro_mortal ();	781	free_coro_mortal ();
740		782
741	UNLOCK;	783	UNLOCK;
742	}	784	}
743	}	785	}
744		786
745	/* use this function pointer to call the above function */
746	/* this is done to increase chances of the compiler not inlining the call */
747	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
748	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;
749
750	struct transfer_args	787	struct transfer_args
751	{	788	{
752	struct coro prev, next;	789	struct coro prev, next;
753	int flags;
754	};	790	};
755		791
756	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	792	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
757		793
758	static void	794	static void
759	coro_state_destroy (struct coro *coro)	795	coro_state_destroy (struct coro *coro)
760	{	796	{
761	if (coro->refcnt--)	797	if (coro->refcnt--)
762	return;	798	return;
763		799
764	if (coro->mainstack && coro->mainstack != main_mainstack)	800	if (coro->mainstack && coro->mainstack != main_mainstack)
765	{	801	{
766	struct coro temp;	802	struct coro temp;
		803	Zero (&temp, 1, struct coro);
		804	temp.save = CORO_SAVE_ALL;
767		805
768	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	806	if (coro->flags & CF_RUNNING)
769	LOAD (aTHX_ coro);	807	croak ("FATAL: tried to destroy currently running coroutine");
770		808
		809	save_perl (&temp);
		810	load_perl (coro);
		811
771	destroy_stacks (aTHX);	812	coro_destroy_stacks ();
772		813
773	LOAD ((&temp)); /* this will get rid of defsv etc.. */	814	load_perl (&temp); /* this will get rid of defsv etc.. */
774		815
775	coro->mainstack = 0;	816	coro->mainstack = 0;
776	}	817	}
777		818
778	stack_free (coro->stack);	819	cctx_destroy (coro->cctx);
779	SvREFCNT_dec (coro->args);	820	SvREFCNT_dec (coro->args);
780	Safefree (coro);	821	Safefree (coro);
781	}	822	}
782		823
783	static int	824	static int
784	coro_state_clear (SV sv, MAGIC mg)	825	coro_state_clear (pTHX_ SV sv, MAGIC mg)
785	{	826	{
786	struct coro coro = (struct coro )mg->mg_ptr;	827	struct coro coro = (struct coro )mg->mg_ptr;
787	mg->mg_ptr = 0;	828	mg->mg_ptr = 0;
788		829
789	coro_state_destroy (coro);	830	coro_state_destroy (coro);
790		831
791	return 0;	832	return 0;
792	}	833	}
793		834
794	static int	835	static int
795	coro_state_dup (MAGIC mg, CLONE_PARAMS params)	836	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
796	{	837	{
797	struct coro coro = (struct coro )mg->mg_ptr;	838	struct coro coro = (struct coro )mg->mg_ptr;
798		839
799	++coro->refcnt;	840	++coro->refcnt;
800		841
801	return 0;	842	return 0;
802	}	843	}
803		844
804	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	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	};
805		855
806	static struct coro *	856	static struct coro *
807	SvSTATE (SV *coro)	857	SvSTATE (SV *coro)
808	{	858	{
809	HV *stash;	859	HV *stash;
…		…
824	assert (mg->mg_type == PERL_MAGIC_ext);	874	assert (mg->mg_type == PERL_MAGIC_ext);
825	return (struct coro *)mg->mg_ptr;	875	return (struct coro *)mg->mg_ptr;
826	}	876	}
827		877
828	static void	878	static void
829	prepare_transfer (pTHX_ struct transfer_args ta, SV prev, SV *next, int flags)	879	prepare_transfer (struct transfer_args ta, SV prev_sv, SV *next_sv)
830	{	880	{
831	ta->prev = SvSTATE (prev);	881	ta->prev = SvSTATE (prev_sv);
832	ta->next = SvSTATE (next);	882	ta->next = SvSTATE (next_sv);
833	ta->flags = flags;
834	}	883	}
835		884
836	static void	885	static void
837	api_transfer (SV prev, SV next, int flags)	886	api_transfer (SV prev_sv, SV next_sv)
838	{	887	{
839	dTHX;
840	struct transfer_args ta;	888	struct transfer_args ta;
841		889
842	prepare_transfer (aTHX_ &ta, prev, next, flags);	890	prepare_transfer (&ta, prev_sv, next_sv);
843	TRANSFER (ta);	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;
844	}	904	}
845		905
846	/ Coro ******************************************************************/	906	/ Coro ******************************************************************/
847		907
848	#define PRIO_MAX 3	908	#define PRIO_MAX 3
…		…
851	#define PRIO_LOW -1	911	#define PRIO_LOW -1
852	#define PRIO_IDLE -3	912	#define PRIO_IDLE -3
853	#define PRIO_MIN -4	913	#define PRIO_MIN -4
854		914
855	/* for Coro.pm */	915	/* for Coro.pm */
856	static GV coro_current, coro_idle;	916	static SV *coro_current;
857	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	917	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
858	static int coro_nready;	918	static int coro_nready;
859		919
860	static void	920	static void
861	coro_enq (pTHX_ SV *sv)	921	coro_enq (SV *coro_sv)
862	{	922	{
863	int prio;
864
865	if (SvTYPE (sv) != SVt_PVHV)
866	croak ("Coro::ready tried to enqueue something that is not a coroutine");
867
868	prio = SvSTATE (sv)->prio;
869
870	av_push (coro_ready [prio - PRIO_MIN], sv);	923	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
871	coro_nready++;	924	coro_nready++;
872	}	925	}
873		926
874	static SV *	927	static SV *
875	coro_deq (pTHX_ int min_prio)	928	coro_deq (int min_prio)
876	{	929	{
877	int prio = PRIO_MAX - PRIO_MIN;	930	int prio = PRIO_MAX - PRIO_MIN;
878		931
879	min_prio -= PRIO_MIN;	932	min_prio -= PRIO_MIN;
880	if (min_prio < 0)	933	if (min_prio < 0)
…		…
888	}	941	}
889		942
890	return 0;	943	return 0;
891	}	944	}
892		945
893	static void	946	static int
894	api_ready (SV *coro)	947	api_ready (SV *coro_sv)
895	{	948	{
896	dTHX;	949	struct coro *coro;
897		950
898	if (SvROK (coro))	951	if (SvROK (coro_sv))
899	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;
900		965
901	LOCK;	966	LOCK;
902	coro_enq (aTHX_ SvREFCNT_inc (coro));	967	coro_enq (SvREFCNT_inc (coro_sv));
903	UNLOCK;	968	UNLOCK;
904	}
905		969
		970	return 1;
		971	}
		972
906	static void	973	static int
		974	api_is_ready (SV *coro_sv)
		975	{
		976	return !!SvSTATE (coro_sv)->flags & CF_READY;
		977	}
		978
		979	static void
907	prepare_schedule (aTHX_ struct transfer_args *ta)	980	prepare_schedule (struct transfer_args *ta)
908	{	981	{
909	SV current, prev, *next;	982	SV prev, next;
910
911	LOCK;
912
913	current = GvSV (coro_current);
914		983
915	for (;;)	984	for (;;)
916	{	985	{
917	LOCK;	986	LOCK;
918
919	next = coro_deq (aTHX_ PRIO_MIN);	987	next = coro_deq (PRIO_MIN);
		988	UNLOCK;
920		989
921	if (next)	990	if (next)
922	break;	991	break;
923		992
924	UNLOCK;
925
926	{	993	{
927	dSP;	994	dSP;
928		995
929	ENTER;	996	ENTER;
930	SAVETMPS;	997	SAVETMPS;
931		998
932	PUSHMARK (SP);	999	PUSHMARK (SP);
933	PUTBACK;	1000	PUTBACK;
934	call_sv (GvSV (coro_idle), G_DISCARD);	1001	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
935		1002
936	FREETMPS;	1003	FREETMPS;
937	LEAVE;	1004	LEAVE;
938	}	1005	}
939	}	1006	}
940		1007
941	prev = SvRV (current);	1008	prev = SvRV (coro_current);
942	SvRV (current) = next;	1009	SvRV_set (coro_current, next);
943		1010
944	/* free this only after the transfer */	1011	/* free this only after the transfer */
		1012	LOCK;
945	free_coro_mortal ();	1013	free_coro_mortal ();
		1014	UNLOCK;
946	coro_mortal = prev;	1015	coro_mortal = prev;
947		1016
		1017	assert (!SvROK(prev));//D
		1018	assert (!SvROK(next));//D
		1019
948	ta->prev = SvSTATE (prev);	1020	ta->prev = SvSTATE (prev);
949	ta->next = SvSTATE (next);	1021	ta->next = SvSTATE (next);
950	ta->flags = TRANSFER_SAVE_ALL;
951		1022
952	UNLOCK;	1023	assert (ta->next->flags & CF_READY);
		1024	ta->next->flags &= ~CF_READY;
953	}	1025	}
954		1026
955	static void	1027	static void
956	prepare_cede (aTHX_ struct transfer_args *ta)	1028	prepare_cede (struct transfer_args *ta)
957	{	1029	{
958	LOCK;	1030	api_ready (coro_current);
959	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
960	UNLOCK;
961		1031
962	prepare_schedule (ta);	1032	prepare_schedule (ta);
963	}	1033	}
964		1034
965	static void	1035	static void
966	api_schedule (void)	1036	api_schedule (void)
967	{	1037	{
968	dTHX;
969	struct transfer_args ta;	1038	struct transfer_args ta;
970		1039
971	prepare_schedule (&ta);	1040	prepare_schedule (&ta);
972	TRANSFER (ta);	1041	TRANSFER (ta);
973	}	1042	}
974		1043
975	static void	1044	static void
976	api_cede (void)	1045	api_cede (void)
977	{	1046	{
978	dTHX;
979	struct transfer_args ta;	1047	struct transfer_args ta;
980		1048
981	prepare_cede (&ta);	1049	prepare_cede (&ta);
982	TRANSFER (ta);	1050	TRANSFER (ta);
983	}	1051	}
…		…
993	#endif	1061	#endif
994	BOOT_PAGESIZE;	1062	BOOT_PAGESIZE;
995		1063
996	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1064	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
997		1065
998	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1066	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
999	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1067	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1000	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));
		1070	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1001		1071
1002	main_mainstack = PL_mainstack;	1072	main_mainstack = PL_mainstack;
1003		1073
1004	coroapi.ver = CORO_API_VERSION;	1074	coroapi.ver = CORO_API_VERSION;
1005	coroapi.transfer = api_transfer;	1075	coroapi.transfer = api_transfer;
1006
1007	Newz (0, main_stack, 1, coro_stack);
1008	main_stack->idle_sp = (void *)-1;
1009		1076
1010	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1077	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1011	}	1078	}
1012		1079
1013	SV *	1080	SV *
…		…
1018	HV *hv;	1085	HV *hv;
1019	int i;	1086	int i;
1020		1087
1021	Newz (0, coro, 1, struct coro);	1088	Newz (0, coro, 1, struct coro);
1022	coro->args = newAV ();	1089	coro->args = newAV ();
		1090	coro->save = CORO_SAVE_ALL;
		1091	coro->flags = CF_NEW;
1023		1092
1024	hv = newHV ();	1093	hv = newHV ();
1025	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1094	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
1026	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1095	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1027		1096
1028	for (i = 1; i < items; i++)	1097	for (i = 1; i < items; i++)
1029	av_push (coro->args, newSVsv (ST (i)));	1098	av_push (coro->args, newSVsv (ST (i)));
1030
1031	coro->stack = main_stack;
1032	/coro->mainstack = 0; //actual work is done inside transfer /
1033	/coro->stack = 0;/
1034	}	1099	}
1035	OUTPUT:	1100	OUTPUT:
1036	RETVAL	1101	RETVAL
1037		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
1038	void	1110	void
1039	transfer (...)	1111	_set_stacklevel (...)
1040	ALIAS:	1112	ALIAS:
1041	Coro::schedule = 1	1113	Coro::State::transfer = 1
1042	Coro::cede = 2	1114	Coro::schedule = 2
1043	_set_stacklevel = 3	1115	Coro::cede = 3
1044	CODE:	1116	CODE:
1045	{	1117	{
1046	struct transfer_args ta;	1118	struct transfer_args ta;
1047		1119
1048	switch (ix)	1120	switch (ix)
1049	{	1121	{
1050	case 0:	1122	case 0:
1051	if (items != 3)	1123	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1052	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1124	ta.next = 0;
1053
1054	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1055	break;	1125	break;
1056		1126
1057	case 1:	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:
1058	prepare_schedule (&ta);	1135	prepare_schedule (&ta);
1059	break;	1136	break;
1060		1137
1061	case 2:	1138	case 3:
1062	prepare_cede (&ta);	1139	prepare_cede (&ta);
1063	break;
1064
1065	case 3:
1066	ta.prev = (struct coro )INT2PTR (coro_stack , SvIV (ST (0)));
1067	ta.next = 0;
1068	ta.flags = TRANSFER_SET_STACKLEVEL;
1069	break;	1140	break;
1070	}	1141	}
1071		1142
1072	TRANSFER (ta);	1143	TRANSFER (ta);
1073	}	1144	}
…		…
1081	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);	1152	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1082		1153
1083	++coro_src->refcnt;	1154	++coro_src->refcnt;
1084	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;	1155	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1085	}	1156	}
1086
1087	void
1088	_nonlocal_goto (IV nextop)
1089	CODE:
1090	/* uuh, somebody will kill me again for this */
1091	PL_op->op_next = INT2PTR (OP *, nextop);
1092		1157
1093	void	1158	void
1094	_exit (code)	1159	_exit (code)
1095	int code	1160	int code
1096	PROTOTYPE: $	1161	PROTOTYPE: $
1097	CODE:	1162	CODE:
1098	_exit (code);	1163	_exit (code);
1099		1164
1100	MODULE = Coro::State PACKAGE = Coro::Cont	1165	int
		1166	cctx_count ()
		1167	CODE:
		1168	RETVAL = cctx_count;
		1169	OUTPUT:
		1170	RETVAL
1101		1171
1102	void	1172	int
1103	yield (...)	1173	cctx_idle ()
1104	PROTOTYPE: @	1174	CODE:
1105	CODE:	1175	RETVAL = cctx_idle;
1106	{	1176	OUTPUT:
1107	SV *yieldstack;	1177	RETVAL
1108	SV *sv;
1109	AV *defav = GvAV (PL_defgv);
1110	struct coro prev, next;
1111
1112	yieldstack = *hv_fetch (
1113	(HV *)SvRV (GvSV (coro_current)),
1114	"yieldstack", sizeof ("yieldstack") - 1,
1115	0
1116	);
1117
1118	/* set up @_ -- ugly */
1119	av_clear (defav);
1120	av_fill (defav, items - 1);
1121	while (items--)
1122	av_store (defav, items, SvREFCNT_inc (ST(items)));
1123
1124	sv = av_pop ((AV *)SvRV (yieldstack));
1125	prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1126	next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1127	SvREFCNT_dec (sv);
1128
1129	coro_state_transfer (aTHX_ prev, next, 0);
1130	}
1131		1178
1132	MODULE = Coro::State PACKAGE = Coro	1179	MODULE = Coro::State PACKAGE = Coro
1133		1180
1134	BOOT:	1181	BOOT:
1135	{	1182	{
…		…
1142	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1189	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1143	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1190	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1144	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1191	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1145	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1192	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1146		1193
1147	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1194	coro_current = get_sv ("Coro::current", FALSE);
1148	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1195	SvREADONLY_on (coro_current);
1149		1196
1150	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1197	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1151	coro_ready[i] = newAV ();	1198	coro_ready[i] = newAV ();
1152		1199
1153	{	1200	{
1154	SV *sv = perl_get_sv("Coro::API", 1);	1201	SV *sv = perl_get_sv("Coro::API", 1);
1155		1202
1156	coroapi.schedule = api_schedule;	1203	coroapi.schedule = api_schedule;
		1204	coroapi.save = api_save;
1157	coroapi.cede = api_cede;	1205	coroapi.cede = api_cede;
1158	coroapi.ready = api_ready;	1206	coroapi.ready = api_ready;
		1207	coroapi.is_ready = api_is_ready;
1159	coroapi.nready = &coro_nready;	1208	coroapi.nready = &coro_nready;
1160	coroapi.current = coro_current;	1209	coroapi.current = coro_current;
1161		1210
1162	GCoroAPI = &coroapi;	1211	GCoroAPI = &coroapi;
1163	sv_setiv (sv, (IV)&coroapi);	1212	sv_setiv (sv, (IV)&coroapi);
1164	SvREADONLY_on (sv);	1213	SvREADONLY_on (sv);
1165	}	1214	}
1166	}	1215	}
		1216
		1217	void
		1218	_set_current (SV *current)
		1219	PROTOTYPE: $
		1220	CODE:
		1221	SvREFCNT_dec (SvRV (coro_current));
		1222	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1167		1223
1168	int	1224	int
1169	prio (Coro::State coro, int newprio = 0)	1225	prio (Coro::State coro, int newprio = 0)
1170	ALIAS:	1226	ALIAS:
1171	nice = 1	1227	nice = 1
…		…
1183		1239
1184	coro->prio = newprio;	1240	coro->prio = newprio;
1185	}	1241	}
1186	}	1242	}
1187		1243
1188	void	1244	SV *
1189	ready (SV *self)	1245	ready (SV *self)
1190	PROTOTYPE: $	1246	PROTOTYPE: $
1191	CODE:	1247	CODE:
1192	api_ready (self);	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
1193		1259
1194	int	1260	int
1195	nready (...)	1261	nready (...)
1196	PROTOTYPE:	1262	PROTOTYPE:
1197	CODE:	1263	CODE:
…		…
1203		1269
1204	SV *	1270	SV *
1205	_get_state ()	1271	_get_state ()
1206	CODE:	1272	CODE:
1207	{	1273	{
1208	struct {	1274	struct io_state *data;
1209	int errorno;
1210	int laststype;
1211	int laststatval;
1212	Stat_t statcache;
1213	} data;
1214		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
1215	data.errorno = errno;	1281	data->errorno = errno;
1216	data.laststype = PL_laststype;	1282	data->laststype = PL_laststype;
1217	data.laststatval = PL_laststatval;	1283	data->laststatval = PL_laststatval;
1218	data.statcache = PL_statcache;	1284	data->statcache = PL_statcache;
1219
1220	RETVAL = newSVpvn ((char *)&data, sizeof data);
1221	}	1285	}
1222	OUTPUT:	1286	OUTPUT:
1223	RETVAL	1287	RETVAL
1224		1288
1225	void	1289	void
1226	_set_state (char *data_)	1290	_set_state (char *data_)
1227	PROTOTYPE: $	1291	PROTOTYPE: $
1228	CODE:	1292	CODE:
1229	{	1293	{
1230	struct {	1294	struct io_state data = (void )data_;
1231	int errorno;
1232	int laststype;
1233	int laststatval;
1234	Stat_t statcache;
1235	} data = (void )data_;
1236		1295
1237	errno = data->errorno;	1296	errno = data->errorno;
1238	PL_laststype = data->laststype;	1297	PL_laststype = data->laststype;
1239	PL_laststatval = data->laststatval;	1298	PL_laststatval = data->laststatval;
1240	PL_statcache = data->statcache;	1299	PL_statcache = data->statcache;
1241	}	1300	}
		1301

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing Coro/Coro/State.xs (file contents): Revision 1.93 by root, Sun Nov 26 03:22:50 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 1.93 by root, Sun Nov 26 03:22:50 2006 UTC vs.
Revision 1.123 by root, Mon Dec 4 21:56:00 2006 UTC