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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.92 by root, Sun Nov 26 02:16:19 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	void idle_sp; / original stacklevel when coroutine was created */	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 */
		129	void idle_sp; / sp of top-level transfer/schedule/cede call */
		130	JMPENV *top_env;
100	coro_context cctx;	131	coro_context cctx;
101	JMPENV *top_env;
102	} coro_stack;
103		132
104	/* the (fake) coro_stack representing the main program */	133	int inuse;
105	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	};
106		145
107	/* this is a structure representing a perl-level coroutine */	146	/* this is a structure representing a perl-level coroutine */
108	struct coro {	147	struct coro {
109	/* the c coroutine allocated to this perl coroutine, if any */	148	/* the c coroutine allocated to this perl coroutine, if any */
110	coro_stack *stack;	149	coro_cctx *cctx;
111		150
112	/* data associated with this coroutine (initial args) */	151	/* data associated with this coroutine (initial args) */
113	AV *args;	152	AV *args;
114	int refcnt;	153	int refcnt;
		154	int save; /* CORO_SAVE flags */
		155	int flags; /* CF_ flags */
115		156
116	/* optionally saved, might be zero */	157	/* optionally saved, might be zero */
117	AV *defav;	158	AV defav; / @_ */
118	SV *defsv;	159	SV defsv; / $_ */
119	SV *errsv;	160	SV errsv; / $@ */
		161	SV irssv; / $/ */
		162	SV irssv_sv; / real $/ cache */
120		163
121	/* saved global state not related to stacks */	164	#define VAR(name,type) type name;
122	U8 dowarn;	165	# include "state.h"
123	I32 in_eval;	166	#undef VAR
124
125	/* the stacks and related info (callchain etc..) */
126	PERL_SI *curstackinfo;
127	AV *curstack;
128	AV *mainstack;
129	SV **stack_sp;
130	OP *op;
131	SV **curpad;
132	AV *comppad;
133	CV *compcv;
134	SV **stack_base;
135	SV **stack_max;
136	SV **tmps_stack;
137	I32 tmps_floor;
138	I32 tmps_ix;
139	I32 tmps_max;
140	I32 *markstack;
141	I32 *markstack_ptr;
142	I32 *markstack_max;
143	I32 *scopestack;
144	I32 scopestack_ix;
145	I32 scopestack_max;
146	ANY *savestack;
147	I32 savestack_ix;
148	I32 savestack_max;
149	OP **retstack;
150	I32 retstack_ix;
151	I32 retstack_max;
152	PMOP *curpm;
153	COP *curcop;
154		167
155	/* coro process data */	168	/* coro process data */
156	int prio;	169	int prio;
157	};	170	};
158		171
159	typedef struct coro *Coro__State;	172	typedef struct coro *Coro__State;
160	typedef struct coro *Coro__State_or_hashref;	173	typedef struct coro *Coro__State_or_hashref;
161		174
162	static AV *	175	static AV *
163	coro_clone_padlist (pTHX_ CV *cv)	176	coro_clone_padlist (CV *cv)
164	{	177	{
165	AV *padlist = CvPADLIST (cv);	178	AV *padlist = CvPADLIST (cv);
166	AV newpadlist, newpad;	179	AV newpadlist, newpad;
167		180
168	newpadlist = newAV ();	181	newpadlist = newAV ();
169	AvREAL_off (newpadlist);	182	AvREAL_off (newpadlist);
170	#if PERL_VERSION < 9	183	#if PERL_VERSION_ATLEAST (5,9,0)
		184	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		185	#else
171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	186	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
172	#else
173	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
174	#endif	187	#endif
175	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	188	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
176	--AvFILLp (padlist);	189	--AvFILLp (padlist);
177		190
178	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	191	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
180		193
181	return newpadlist;	194	return newpadlist;
182	}	195	}
183		196
184	static void	197	static void
185	free_padlist (pTHX_ AV *padlist)	198	free_padlist (AV *padlist)
186	{	199	{
187	/* may be during global destruction */	200	/* may be during global destruction */
188	if (SvREFCNT (padlist))	201	if (SvREFCNT (padlist))
189	{	202	{
190	I32 i = AvFILLp (padlist);	203	I32 i = AvFILLp (padlist);
…		…
211	AV *padlist;	224	AV *padlist;
212	AV av = (AV )mg->mg_obj;	225	AV av = (AV )mg->mg_obj;
213		226
214	/* casting is fun. */	227	/* casting is fun. */
215	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	228	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
216	free_padlist (aTHX_ padlist);	229	free_padlist (padlist);
217		230
218	SvREFCNT_dec (av);	231	SvREFCNT_dec (av);
219		232
220	return 0;	233	return 0;
221	}	234	}
222		235
223	#define PERL_MAGIC_coro PERL_MAGIC_ext	236	#define PERL_MAGIC_coro PERL_MAGIC_ext
224		237
225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	238	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
226		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
227	/* the next two functions merely cache the padlists */	247	/* the next two functions merely cache the padlists */
228	static void	248	static void
229	get_padlist (pTHX_ CV *cv)	249	get_padlist (CV *cv)
230	{	250	{
231	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	251	MAGIC *mg = CORO_MAGIC (cv);
		252	AV *av;
232		253
233	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	254	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
234	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	255	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
235	else	256	else
236	{	257	{
237	#if 0	258	#if 0
238	/* this should work - but it doesn't :( */	259	/* this is probably cleaner, but also slower? */
239	CV *cp = Perl_cv_clone (aTHX_ cv);	260	CV *cp = Perl_cv_clone (cv);
240	CvPADLIST (cv) = CvPADLIST (cp);	261	CvPADLIST (cv) = CvPADLIST (cp);
241	CvPADLIST (cp) = 0;	262	CvPADLIST (cp) = 0;
242	SvREFCNT_dec (cp);	263	SvREFCNT_dec (cp);
243	#else	264	#else
244	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	265	CvPADLIST (cv) = coro_clone_padlist (cv);
245	#endif	266	#endif
246	}	267	}
247	}	268	}
248		269
249	static void	270	static void
250	put_padlist (pTHX_ CV *cv)	271	put_padlist (CV *cv)
251	{	272	{
252	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	273	MAGIC *mg = CORO_MAGIC (cv);
		274	AV *av;
253		275
254	if (!mg)	276	if (!mg)
255	{	277	{
256	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	278	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
257	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	279	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
258	mg->mg_virtual = &vtbl_coro;	280	mg->mg_virtual = &vtbl_coro;
259	mg->mg_obj = (SV *)newAV ();	281	mg->mg_obj = (SV *)newAV ();
260	}	282	}
261		283
262	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);
263	}	290	}
264		291
265	#define SB do {	292	#define SB do {
266	#define SE } while (0)	293	#define SE } while (0)
267		294
268	#define LOAD(state) load_state(aTHX_ (state));
269	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
270
271	#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
272		296
273	static void	297	static void
274	load_state(pTHX_ Coro__State c)	298	load_perl (Coro__State c)
275	{	299	{
276	PL_dowarn = c->dowarn;	300	#define VAR(name,type) PL_ ## name = c->name;
277	PL_in_eval = c->in_eval;	301	# include "state.h"
278		302	#undef VAR
279	PL_curstackinfo = c->curstackinfo;
280	PL_curstack = c->curstack;
281	PL_mainstack = c->mainstack;
282	PL_stack_sp = c->stack_sp;
283	PL_op = c->op;
284	PL_curpad = c->curpad;
285	PL_comppad = c->comppad;
286	PL_compcv = c->compcv;
287	PL_stack_base = c->stack_base;
288	PL_stack_max = c->stack_max;
289	PL_tmps_stack = c->tmps_stack;
290	PL_tmps_floor = c->tmps_floor;
291	PL_tmps_ix = c->tmps_ix;
292	PL_tmps_max = c->tmps_max;
293	PL_markstack = c->markstack;
294	PL_markstack_ptr = c->markstack_ptr;
295	PL_markstack_max = c->markstack_max;
296	PL_scopestack = c->scopestack;
297	PL_scopestack_ix = c->scopestack_ix;
298	PL_scopestack_max = c->scopestack_max;
299	PL_savestack = c->savestack;
300	PL_savestack_ix = c->savestack_ix;
301	PL_savestack_max = c->savestack_max;
302	#if PERL_VERSION < 9
303	PL_retstack = c->retstack;
304	PL_retstack_ix = c->retstack_ix;
305	PL_retstack_max = c->retstack_max;
306	#endif
307	PL_curpm = c->curpm;
308	PL_curcop = c->curcop;
309		303
310	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
311	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
312	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	}
313		318
314	{	319	{
315	dSP;	320	dSP;
316	CV *cv;	321	CV *cv;
317		322
318	/* now do the ugly restore mess */	323	/* now do the ugly restore mess */
319	while ((cv = (CV *)POPs))	324	while ((cv = (CV *)POPs))
320	{	325	{
321	AV padlist = (AV )POPs;
322
323	if (padlist)
324	{
325	put_padlist (aTHX_ cv); /* mark this padlist as available */	326	put_padlist (cv); /* mark this padlist as available */
326	CvPADLIST(cv) = padlist;	327	CvDEPTH (cv) = PTR2IV (POPs);
327	}	328	CvPADLIST (cv) = (AV *)POPs;
328
329	++CvDEPTH(cv);
330	}	329	}
331		330
332	PUTBACK;	331	PUTBACK;
333	}	332	}
334	}	333	}
335		334
336	static void	335	static void
337	save_state(pTHX_ Coro__State c, int flags)	336	save_perl (Coro__State c)
338	{	337	{
339	{	338	{
340	dSP;	339	dSP;
341	I32 cxix = cxstack_ix;	340	I32 cxix = cxstack_ix;
342	PERL_CONTEXT *ccstk = cxstack;	341	PERL_CONTEXT *ccstk = cxstack;
…		…
353	{	352	{
354	while (cxix >= 0)	353	while (cxix >= 0)
355	{	354	{
356	PERL_CONTEXT *cx = &ccstk[cxix--];	355	PERL_CONTEXT *cx = &ccstk[cxix--];
357		356
358	if (CxTYPE(cx) == CXt_SUB)	357	if (CxTYPE (cx) == CXt_SUB)
359	{	358	{
360	CV *cv = cx->blk_sub.cv;	359	CV *cv = cx->blk_sub.cv;
		360
361	if (CvDEPTH(cv))	361	if (CvDEPTH (cv))
362	{	362	{
363	EXTEND (SP, CvDEPTH(cv)*2);	363	EXTEND (SP, 3);
364		364
365	while (--CvDEPTH(cv))
366	{
367	/* this tells the restore code to increment CvDEPTH */
368	PUSHs (Nullsv);
369	PUSHs ((SV *)cv);
370	}
371
372	PUSHs ((SV *)CvPADLIST(cv));	365	PUSHs ((SV *)CvPADLIST (cv));
		366	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
373	PUSHs ((SV *)cv);	367	PUSHs ((SV *)cv);
374		368
		369	CvDEPTH (cv) = 0;
375	get_padlist (aTHX_ cv);	370	get_padlist (cv);
376	}	371	}
377	}	372	}
378	#ifdef CXt_FORMAT	373	#ifdef CXt_FORMAT
379	else if (CxTYPE(cx) == CXt_FORMAT)	374	else if (CxTYPE (cx) == CXt_FORMAT)
380	{	375	{
381	/* 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? */
382	/* my bold guess is as a simple, plain sub... */	377	/* my bold guess is as a simple, plain sub... */
383	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");
384	}	379	}
…		…
394	}	389	}
395		390
396	PUTBACK;	391	PUTBACK;
397	}	392	}
398		393
399	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;
400	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	395	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
401	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;
402		398
403	c->dowarn = PL_dowarn;	399	#define VAR(name,type)c->name = PL_ ## name;
404	c->in_eval = PL_in_eval;	400	# include "state.h"
405		401	#undef VAR
406	c->curstackinfo = PL_curstackinfo;
407	c->curstack = PL_curstack;
408	c->mainstack = PL_mainstack;
409	c->stack_sp = PL_stack_sp;
410	c->op = PL_op;
411	c->curpad = PL_curpad;
412	c->comppad = PL_comppad;
413	c->compcv = PL_compcv;
414	c->stack_base = PL_stack_base;
415	c->stack_max = PL_stack_max;
416	c->tmps_stack = PL_tmps_stack;
417	c->tmps_floor = PL_tmps_floor;
418	c->tmps_ix = PL_tmps_ix;
419	c->tmps_max = PL_tmps_max;
420	c->markstack = PL_markstack;
421	c->markstack_ptr = PL_markstack_ptr;
422	c->markstack_max = PL_markstack_max;
423	c->scopestack = PL_scopestack;
424	c->scopestack_ix = PL_scopestack_ix;
425	c->scopestack_max = PL_scopestack_max;
426	c->savestack = PL_savestack;
427	c->savestack_ix = PL_savestack_ix;
428	c->savestack_max = PL_savestack_max;
429	#if PERL_VERSION < 9
430	c->retstack = PL_retstack;
431	c->retstack_ix = PL_retstack_ix;
432	c->retstack_max = PL_retstack_max;
433	#endif
434	c->curpm = PL_curpm;
435	c->curcop = PL_curcop;
436	}	402	}
437		403
438	/*	404	/*
439	* allocate various perl stacks. This is an exact copy	405	* allocate various perl stacks. This is an exact copy
440	* of perl.c:init_stacks, except that it uses less memory	406	* of perl.c:init_stacks, except that it uses less memory
441	* on the (sometimes correct) assumption that coroutines do	407	* on the (sometimes correct) assumption that coroutines do
442	* not usually need a lot of stackspace.	408	* not usually need a lot of stackspace.
443	*/	409	*/
444	static void	410	static void
445	coro_init_stacks (pTHX)	411	coro_init_stacks ()
446	{	412	{
447	LOCK;
448
449	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	413	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
450	PL_curstackinfo->si_type = PERLSI_MAIN;	414	PL_curstackinfo->si_type = PERLSI_MAIN;
451	PL_curstack = PL_curstackinfo->si_stack;	415	PL_curstack = PL_curstackinfo->si_stack;
452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	416	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453		417
454	PL_stack_base = AvARRAY(PL_curstack);	418	PL_stack_base = AvARRAY(PL_curstack);
455	PL_stack_sp = PL_stack_base;	419	PL_stack_sp = PL_stack_base;
456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	420	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457		421
458	New(50,PL_tmps_stack,96,SV*);	422	New(50,PL_tmps_stack,128,SV*);
459	PL_tmps_floor = -1;	423	PL_tmps_floor = -1;
460	PL_tmps_ix = -1;	424	PL_tmps_ix = -1;
461	PL_tmps_max = 96;	425	PL_tmps_max = 128;
462		426
463	New(54,PL_markstack,16,I32);	427	New(54,PL_markstack,32,I32);
464	PL_markstack_ptr = PL_markstack;	428	PL_markstack_ptr = PL_markstack;
465	PL_markstack_max = PL_markstack + 16;	429	PL_markstack_max = PL_markstack + 32;
466		430
467	#ifdef SET_MARK_OFFSET	431	#ifdef SET_MARK_OFFSET
468	SET_MARK_OFFSET;	432	SET_MARK_OFFSET;
469	#endif	433	#endif
470		434
471	New(54,PL_scopestack,16,I32);	435	New(54,PL_scopestack,32,I32);
472	PL_scopestack_ix = 0;	436	PL_scopestack_ix = 0;
473	PL_scopestack_max = 16;	437	PL_scopestack_max = 32;
474		438
475	New(54,PL_savestack,96,ANY);	439	New(54,PL_savestack,64,ANY);
476	PL_savestack_ix = 0;	440	PL_savestack_ix = 0;
477	PL_savestack_max = 96;	441	PL_savestack_max = 64;
478		442
479	#if PERL_VERSION < 9	443	#if !PERL_VERSION_ATLEAST (5,9,0)
480	New(54,PL_retstack,8,OP*);	444	New(54,PL_retstack,16,OP*);
481	PL_retstack_ix = 0;	445	PL_retstack_ix = 0;
482	PL_retstack_max = 8;	446	PL_retstack_max = 16;
483	#endif	447	#endif
484
485	UNLOCK;
486	}	448	}
487		449
488	/*	450	/*
489	* destroy the stacks, the callchain etc...	451	* destroy the stacks, the callchain etc...
490	*/	452	*/
491	static void	453	static void
492	destroy_stacks(pTHX)	454	coro_destroy_stacks ()
493	{	455	{
494	if (!IN_DESTRUCT)	456	if (!IN_DESTRUCT)
495	{	457	{
496	/* is this ugly, I ask? */	458	/* is this ugly, I ask? */
497	LEAVE_SCOPE (0);	459	LEAVE_SCOPE (0);
…		…
528		490
529	Safefree (PL_tmps_stack);	491	Safefree (PL_tmps_stack);
530	Safefree (PL_markstack);	492	Safefree (PL_markstack);
531	Safefree (PL_scopestack);	493	Safefree (PL_scopestack);
532	Safefree (PL_savestack);	494	Safefree (PL_savestack);
533	#if PERL_VERSION < 9	495	#if !PERL_VERSION_ATLEAST (5,9,0)
534	Safefree (PL_retstack);	496	Safefree (PL_retstack);
535	#endif	497	#endif
536	}	498	}
537		499
538	static void	500	static void
539	setup_coro (struct coro *coro)	501	setup_coro (struct coro *coro)
540	{	502	{
541	/*	503	/*
542	* emulate part of the perl startup here.	504	* emulate part of the perl startup here.
543	*/	505	*/
544	dTHX;
545	dSP;
546	UNOP myop;
547	SV sub_init = (SV )get_cv ("Coro::State::coro_init", FALSE);
548		506
549	coro_init_stacks (aTHX);	507	coro_init_stacks ();
550	/PL_curcop = 0;/	508
551	/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
552	SvREFCNT_dec (GvAV (PL_defgv));	520	SvREFCNT_dec (GvAV (PL_defgv));
553	GvAV (PL_defgv) = coro->args; coro->args = 0;	521	GvAV (PL_defgv) = coro->args; coro->args = 0;
554		522
555	SPAGAIN;
556
557	Zero (&myop, 1, UNOP);	523	Zero (&myop, 1, LOGOP);
558	myop.op_next = Nullop;	524	myop.op_next = Nullop;
559	myop.op_flags = OPf_WANT_VOID;	525	myop.op_flags = OPf_WANT_VOID;
560		526
		527	PUSHMARK (SP);
		528	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		529	PUTBACK;
561	PL_op = (OP *)&myop;	530	PL_op = (OP *)&myop;
562
563	PUSHMARK(SP);
564	XPUSHs (sub_init);
565	PUTBACK;
566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	531	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
567	SPAGAIN;	532	SPAGAIN;
		533	}
568		534
569	ENTER; /* necessary e.g. for dounwind */	535	ENTER; /* necessary e.g. for dounwind */
570	}	536	}
571		537
572	static void	538	static void
…		…
577	SvREFCNT_dec (coro_mortal);	543	SvREFCNT_dec (coro_mortal);
578	coro_mortal = 0;	544	coro_mortal = 0;
579	}	545	}
580	}	546	}
581		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
582	static void	569	static void
583	coro_run (void *arg)	570	coro_run (void *arg)
584	{	571	{
		572	/* coro_run is the alternative tail of transfer(), so unlock here. */
		573	UNLOCK;
		574
585	/*	575	/*
586	* this is a _very_ stripped down perl interpreter ;)	576	* this is a _very_ stripped down perl interpreter ;)
587	*/	577	*/
588	dTHX;
589	PL_top_env = &PL_start_env;	578	PL_top_env = &PL_start_env;
590		579
591	UNLOCK;	580	/* inject call to cctx_init */
		581	prepare_cctx ((coro_cctx *)arg);
592		582
593	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
594	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
595	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
596
597	/* somebody will hit me for both perl_run and PL_restart_op */	583	/* somebody will hit me for both perl_run and PL_restartop */
598	perl_run (aTHX_ PERL_GET_CONTEXT);	584	PL_restartop = PL_op;
		585	perl_run (PL_curinterp);
599		586
		587	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
600	abort ();	588	abort ();
601	}	589	}
602		590
603	static coro_stack *	591	static coro_cctx *
604	stack_new ()	592	cctx_new ()
605	{	593	{
606	coro_stack *stack;	594	coro_cctx *cctx;
607		595
		596	++cctx_count;
		597
608	New (0, stack, 1, coro_stack);	598	New (0, cctx, 1, coro_cctx);
609		599
610	#if HAVE_MMAP	600	#if HAVE_MMAP
611		601
612	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 */
613	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);
614		605
615	if (stack->sptr == (void *)-1)	606	if (cctx->sptr == (void *)-1)
616	{	607	{
617	perror ("FATAL: unable to mmap stack for coroutine");	608	perror ("FATAL: unable to mmap stack for coroutine");
618	_exit (EXIT_FAILURE);	609	_exit (EXIT_FAILURE);
619	}	610	}
620		611
		612	# if STACKGUARD
621	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	613	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		614	# endif
622		615
623	#else	616	#else
624		617
625	stack->ssize = STACKSIZE * (long)sizeof (long);	618	cctx->ssize = STACKSIZE * (long)sizeof (long);
626	New (0, stack->sptr, STACKSIZE, long);	619	New (0, cctx->sptr, STACKSIZE, long);
627		620
628	if (!stack->sptr)	621	if (!cctx->sptr)
629	{	622	{
630	perror (stderr, "FATAL: unable to malloc stack for coroutine");	623	perror ("FATAL: unable to malloc stack for coroutine");
631	_exit (EXIT_FAILURE);	624	_exit (EXIT_FAILURE);
632	}	625	}
633		626
634	#endif	627	#endif
635		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 (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	636	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
637		637
638	return stack;	638	return cctx;
639	}	639	}
640		640
641	static void	641	static void
642	stack_free (coro_stack *stack)	642	cctx_destroy (coro_cctx *cctx)
643	{	643	{
644	if (!stack \|\| stack == main_stack)	644	if (!cctx)
645	return;	645	return;
646		646
		647	--cctx_count;
		648
		649	#if USE_VALGRIND
		650	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		651	#endif
		652
647	#if HAVE_MMAP	653	#if HAVE_MMAP
648	munmap (stack->sptr, stack->ssize);	654	munmap (cctx->sptr, cctx->ssize);
649	#else	655	#else
650	Safefree (stack->sptr);	656	Safefree (cctx->sptr);
651	#endif	657	#endif
652		658
653	Safefree (stack);	659	Safefree (cctx);
654	}	660	}
655		661
656	static coro_stack *stack_first;
657
658	static coro_stack *	662	static coro_cctx *
659	stack_get ()	663	cctx_get ()
660	{	664	{
661	coro_stack *stack;	665	coro_cctx *cctx;
662		666
663	if (stack_first)	667	if (cctx_first)
664	{	668	{
665	stack = stack_first;	669	cctx = cctx_first;
666	stack_first = stack->next;	670	cctx_first = cctx->next;
		671	--cctx_idle;
667	}	672	}
668	else	673	else
669	{	674	{
670	stack = stack_new ();	675	cctx = cctx_new ();
671	PL_op = PL_op->op_next;	676	PL_op = PL_op->op_next;
672	}	677	}
673		678
674	return stack;	679	return cctx;
675	}	680	}
676		681
677	static void	682	static void
678	stack_put (coro_stack *stack)	683	cctx_put (coro_cctx *cctx)
679	{	684	{
680	stack->next = stack_first;	685	/* free another cctx if overlimit */
681	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;
682	}	699	}
683		700
684	/* never call directly, always through the coro_state_transfer global variable */	701	/* never call directly, always through the coro_state_transfer global variable */
685	static void	702	static void NOINLINE
686	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)	703	transfer (struct coro prev, struct coro next)
687	{	704	{
688	dSTACKLEVEL;	705	dSTACKLEVEL;
689		706
690	/* sometimes transfer is only called to set idle_sp */	707	/* sometimes transfer is only called to set idle_sp */
691	if (flags == TRANSFER_SET_STACKLEVEL)	708	if (!next)
692	((coro_stack *)prev)->idle_sp = STACKLEVEL;	709	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
693	else if (prev != next)	710	else if (prev != next)
694	{	711	{
695	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;
696		732
697	LOCK;	733	LOCK;
698		734
699	if (next->mainstack)	735	if (next->flags & CF_NEW)
700	{	736	{
701	/* coroutine already started */	737	/* need to start coroutine */
702	SAVE (prev, flags);	738	next->flags &= ~CF_NEW;
703	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);
704	}	745	}
705	else	746	else
706	{	747	{
707	/* need to start coroutine */	748	/* coroutine already started */
708	/* first get rid of the old state */	749	save_perl (prev);
709	SAVE (prev, -1);	750	load_perl (next);
710	/* setup coroutine call */
711	setup_coro (next);
712	/* need a stack */
713	next->stack = 0;
714	}	751	}
715		752
716	prev__stack = prev->stack;	753	prev__cctx = prev->cctx;
717		754
718	/* possibly "free" the stack */	755	/* possibly "free" the cctx */
719	if (prev__stack->idle_sp == STACKLEVEL)	756	if (prev__cctx->idle_sp == STACKLEVEL)
720	{	757	{
721	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
722	prev->stack = 0;	761	prev->cctx = 0;
		762
		763	cctx_put (prev__cctx);
		764	prev__cctx->inuse = 0;
723	}	765	}
724		766
725	if (!next->stack)	767	if (!next->cctx)
726	next->stack = stack_get ();
727
728	if (prev__stack != next->stack)
729	{	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	{
730	prev__stack->top_env = PL_top_env;	776	prev__cctx->top_env = PL_top_env;
731	PL_top_env = next->stack->top_env;	777	PL_top_env = next->cctx->top_env;
732	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	778	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
733	}	779	}
734		780
735	free_coro_mortal ();	781	free_coro_mortal ();
736		782
737	UNLOCK;	783	UNLOCK;
738	}	784	}
739	}	785	}
740		786
741	/* use this function pointer to call the above function */
742	/* this is done to increase chances of the compiler not inlining the call */
743	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
744	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;
745
746	struct transfer_args	787	struct transfer_args
747	{	788	{
748	struct coro prev, next;	789	struct coro prev, next;
749	int flags;
750	};	790	};
751		791
752	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	792	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
753		793
754	static void	794	static void
755	coro_state_destroy (struct coro *coro)	795	coro_state_destroy (struct coro *coro)
756	{	796	{
757	if (coro->refcnt--)	797	if (coro->refcnt--)
758	return;	798	return;
759		799
760	if (coro->mainstack && coro->mainstack != main_mainstack)	800	if (coro->mainstack && coro->mainstack != main_mainstack)
761	{	801	{
762	struct coro temp;	802	struct coro temp;
		803	Zero (&temp, 1, struct coro);
		804	temp.save = CORO_SAVE_ALL;
763		805
764	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	806	if (coro->flags & CF_RUNNING)
765	LOAD (aTHX_ coro);	807	croak ("FATAL: tried to destroy currently running coroutine");
766		808
		809	save_perl (&temp);
		810	load_perl (coro);
		811
767	destroy_stacks (aTHX);	812	coro_destroy_stacks ();
768		813
769	LOAD ((&temp)); /* this will get rid of defsv etc.. */	814	load_perl (&temp); /* this will get rid of defsv etc.. */
770		815
771	coro->mainstack = 0;	816	coro->mainstack = 0;
772	}	817	}
773		818
774	stack_free (coro->stack);	819	cctx_destroy (coro->cctx);
775	SvREFCNT_dec (coro->args);	820	SvREFCNT_dec (coro->args);
776	Safefree (coro);	821	Safefree (coro);
777	}	822	}
778		823
779	static int	824	static int
780	coro_state_clear (SV sv, MAGIC mg)	825	coro_state_clear (pTHX_ SV sv, MAGIC mg)
781	{	826	{
782	struct coro coro = (struct coro )mg->mg_ptr;	827	struct coro coro = (struct coro )mg->mg_ptr;
783	mg->mg_ptr = 0;	828	mg->mg_ptr = 0;
784		829
785	coro_state_destroy (coro);	830	coro_state_destroy (coro);
786		831
787	return 0;	832	return 0;
788	}	833	}
789		834
790	static int	835	static int
791	coro_state_dup (MAGIC mg, CLONE_PARAMS params)	836	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
792	{	837	{
793	struct coro coro = (struct coro )mg->mg_ptr;	838	struct coro coro = (struct coro )mg->mg_ptr;
794		839
795	++coro->refcnt;	840	++coro->refcnt;
796		841
797	return 0;	842	return 0;
798	}	843	}
799		844
800	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	};
801		855
802	static struct coro *	856	static struct coro *
803	SvSTATE (SV *coro)	857	SvSTATE (SV *coro)
804	{	858	{
805	HV *stash;	859	HV *stash;
…		…
820	assert (mg->mg_type == PERL_MAGIC_ext);	874	assert (mg->mg_type == PERL_MAGIC_ext);
821	return (struct coro *)mg->mg_ptr;	875	return (struct coro *)mg->mg_ptr;
822	}	876	}
823		877
824	static void	878	static void
825	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)
826	{	880	{
827	ta->prev = SvSTATE (prev);	881	ta->prev = SvSTATE (prev_sv);
828	ta->next = SvSTATE (next);	882	ta->next = SvSTATE (next_sv);
829	ta->flags = flags;
830	}	883	}
831		884
832	static void	885	static void
833	api_transfer (SV prev, SV next, int flags)	886	api_transfer (SV prev_sv, SV next_sv)
834	{	887	{
835	dTHX;
836	struct transfer_args ta;	888	struct transfer_args ta;
837		889
838	prepare_transfer (aTHX_ &ta, prev, next, flags);	890	prepare_transfer (&ta, prev_sv, next_sv);
839	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;
840	}	904	}
841		905
842	/ Coro ******************************************************************/	906	/ Coro ******************************************************************/
843		907
844	#define PRIO_MAX 3	908	#define PRIO_MAX 3
…		…
847	#define PRIO_LOW -1	911	#define PRIO_LOW -1
848	#define PRIO_IDLE -3	912	#define PRIO_IDLE -3
849	#define PRIO_MIN -4	913	#define PRIO_MIN -4
850		914
851	/* for Coro.pm */	915	/* for Coro.pm */
852	static GV coro_current, coro_idle;	916	static SV *coro_current;
853	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	917	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
854	static int coro_nready;	918	static int coro_nready;
855		919
856	static void	920	static void
857	coro_enq (pTHX_ SV *sv)	921	coro_enq (SV *coro_sv)
858	{	922	{
859	int prio;
860
861	if (SvTYPE (sv) != SVt_PVHV)
862	croak ("Coro::ready tried to enqueue something that is not a coroutine");
863
864	prio = SvSTATE (sv)->prio;
865
866	av_push (coro_ready [prio - PRIO_MIN], sv);	923	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
867	coro_nready++;	924	coro_nready++;
868	}	925	}
869		926
870	static SV *	927	static SV *
871	coro_deq (pTHX_ int min_prio)	928	coro_deq (int min_prio)
872	{	929	{
873	int prio = PRIO_MAX - PRIO_MIN;	930	int prio = PRIO_MAX - PRIO_MIN;
874		931
875	min_prio -= PRIO_MIN;	932	min_prio -= PRIO_MIN;
876	if (min_prio < 0)	933	if (min_prio < 0)
…		…
884	}	941	}
885		942
886	return 0;	943	return 0;
887	}	944	}
888		945
889	static void	946	static int
890	api_ready (SV *coro)	947	api_ready (SV *coro_sv)
891	{	948	{
892	dTHX;	949	struct coro *coro;
893		950
894	if (SvROK (coro))	951	if (SvROK (coro_sv))
895	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;
896		965
897	LOCK;	966	LOCK;
898	coro_enq (aTHX_ SvREFCNT_inc (coro));	967	coro_enq (SvREFCNT_inc (coro_sv));
899	UNLOCK;	968	UNLOCK;
900	}
901		969
		970	return 1;
		971	}
		972
902	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
903	prepare_schedule (aTHX_ struct transfer_args *ta)	980	prepare_schedule (struct transfer_args *ta)
904	{	981	{
905	SV current, prev, *next;	982	SV prev, next;
906
907	LOCK;
908
909	current = GvSV (coro_current);
910		983
911	for (;;)	984	for (;;)
912	{	985	{
913	LOCK;	986	LOCK;
914
915	next = coro_deq (aTHX_ PRIO_MIN);	987	next = coro_deq (PRIO_MIN);
		988	UNLOCK;
916		989
917	if (next)	990	if (next)
918	break;	991	break;
919		992
920	UNLOCK;
921
922	{	993	{
923	dSP;	994	dSP;
924		995
925	ENTER;	996	ENTER;
926	SAVETMPS;	997	SAVETMPS;
927		998
928	PUSHMARK (SP);	999	PUSHMARK (SP);
929	PUTBACK;	1000	PUTBACK;
930	call_sv (GvSV (coro_idle), G_DISCARD);	1001	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
931		1002
932	FREETMPS;	1003	FREETMPS;
933	LEAVE;	1004	LEAVE;
934	}	1005	}
935	}	1006	}
936		1007
937	prev = SvRV (current);	1008	prev = SvRV (coro_current);
938	SvRV (current) = next;	1009	SvRV_set (coro_current, next);
939		1010
940	/* free this only after the transfer */	1011	/* free this only after the transfer */
		1012	LOCK;
941	free_coro_mortal ();	1013	free_coro_mortal ();
		1014	UNLOCK;
942	coro_mortal = prev;	1015	coro_mortal = prev;
943		1016
		1017	assert (!SvROK(prev));//D
		1018	assert (!SvROK(next));//D
		1019
944	ta->prev = SvSTATE (prev);	1020	ta->prev = SvSTATE (prev);
945	ta->next = SvSTATE (next);	1021	ta->next = SvSTATE (next);
946	ta->flags = TRANSFER_SAVE_ALL;
947		1022
948	UNLOCK;	1023	assert (ta->next->flags & CF_READY);
		1024	ta->next->flags &= ~CF_READY;
949	}	1025	}
950		1026
951	static void	1027	static void
952	prepare_cede (aTHX_ struct transfer_args *ta)	1028	prepare_cede (struct transfer_args *ta)
953	{	1029	{
954	LOCK;	1030	api_ready (coro_current);
955	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
956	UNLOCK;
957		1031
958	prepare_schedule (ta);	1032	prepare_schedule (ta);
959	}	1033	}
960		1034
961	static void	1035	static void
962	api_schedule (void)	1036	api_schedule (void)
963	{	1037	{
964	dTHX;
965	struct transfer_args ta;	1038	struct transfer_args ta;
966		1039
967	prepare_schedule (&ta);	1040	prepare_schedule (&ta);
968	TRANSFER (ta);	1041	TRANSFER (ta);
969	}	1042	}
970		1043
971	static void	1044	static void
972	api_cede (void)	1045	api_cede (void)
973	{	1046	{
974	dTHX;
975	struct transfer_args ta;	1047	struct transfer_args ta;
976		1048
977	prepare_cede (&ta);	1049	prepare_cede (&ta);
978	TRANSFER (ta);	1050	TRANSFER (ta);
979	}	1051	}
…		…
989	#endif	1061	#endif
990	BOOT_PAGESIZE;	1062	BOOT_PAGESIZE;
991		1063
992	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1064	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
993		1065
994	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1066	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
995	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1067	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
996	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));
997		1071
998	main_mainstack = PL_mainstack;	1072	main_mainstack = PL_mainstack;
999		1073
1000	coroapi.ver = CORO_API_VERSION;	1074	coroapi.ver = CORO_API_VERSION;
1001	coroapi.transfer = api_transfer;	1075	coroapi.transfer = api_transfer;
1002
1003	Newz (0, main_stack, 1, coro_stack);
1004	main_stack->idle_sp = (void *)-1;
1005		1076
1006	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1077	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1007	}	1078	}
1008		1079
1009	SV *	1080	SV *
…		…
1014	HV *hv;	1085	HV *hv;
1015	int i;	1086	int i;
1016		1087
1017	Newz (0, coro, 1, struct coro);	1088	Newz (0, coro, 1, struct coro);
1018	coro->args = newAV ();	1089	coro->args = newAV ();
		1090	coro->save = CORO_SAVE_ALL;
		1091	coro->flags = CF_NEW;
1019		1092
1020	hv = newHV ();	1093	hv = newHV ();
1021	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;
1022	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1095	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1023		1096
1024	for (i = 1; i < items; i++)	1097	for (i = 1; i < items; i++)
1025	av_push (coro->args, newSVsv (ST (i)));	1098	av_push (coro->args, newSVsv (ST (i)));
1026
1027	coro->stack = main_stack;
1028	/coro->mainstack = 0; //actual work is done inside transfer /
1029	/coro->stack = 0;/
1030	}	1099	}
1031	OUTPUT:	1100	OUTPUT:
1032	RETVAL	1101	RETVAL
1033		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
1034	void	1110	void
1035	transfer (...)	1111	_set_stacklevel (...)
1036	ALIAS:	1112	ALIAS:
1037	Coro::schedule = 1	1113	Coro::State::transfer = 1
1038	Coro::cede = 2	1114	Coro::schedule = 2
1039	_set_stacklevel = 3	1115	Coro::cede = 3
1040	CODE:	1116	CODE:
1041	{	1117	{
1042	struct transfer_args ta;	1118	struct transfer_args ta;
1043		1119
1044	switch (ix)	1120	switch (ix)
1045	{	1121	{
1046	case 0:	1122	case 0:
1047	if (items != 3)	1123	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1048	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1124	ta.next = 0;
1049
1050	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1051	break;	1125	break;
1052		1126
1053	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:
1054	prepare_schedule (&ta);	1135	prepare_schedule (&ta);
1055	break;	1136	break;
1056		1137
1057	case 2:	1138	case 3:
1058	prepare_cede (&ta);	1139	prepare_cede (&ta);
1059	break;
1060
1061	case 3:
1062	ta.prev = (struct coro )INT2PTR (coro_stack , SvIV (ST (0)));
1063	ta.next = 0;
1064	ta.flags = TRANSFER_SET_STACKLEVEL;
1065	break;	1140	break;
1066	}	1141	}
1067		1142
1068	TRANSFER (ta);	1143	TRANSFER (ta);
1069	}	1144	}
…		…
1077	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);	1152	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1078		1153
1079	++coro_src->refcnt;	1154	++coro_src->refcnt;
1080	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;
1081	}	1156	}
1082
1083	void
1084	_nonlocal_goto (IV nextop)
1085	CODE:
1086	/* uuh, somebody will kill me again for this */
1087	PL_op->op_next = INT2PTR (OP *, nextop);
1088		1157
1089	void	1158	void
1090	_exit (code)	1159	_exit (code)
1091	int code	1160	int code
1092	PROTOTYPE: $	1161	PROTOTYPE: $
1093	CODE:	1162	CODE:
1094	_exit (code);	1163	_exit (code);
1095		1164
1096	MODULE = Coro::State PACKAGE = Coro::Cont	1165	int
		1166	cctx_count ()
		1167	CODE:
		1168	RETVAL = cctx_count;
		1169	OUTPUT:
		1170	RETVAL
1097		1171
1098	void	1172	int
1099	yield (...)	1173	cctx_idle ()
1100	PROTOTYPE: @	1174	CODE:
1101	CODE:	1175	RETVAL = cctx_idle;
1102	{	1176	OUTPUT:
1103	SV *yieldstack;	1177	RETVAL
1104	SV *sv;
1105	AV *defav = GvAV (PL_defgv);
1106	struct coro prev, next;
1107
1108	yieldstack = *hv_fetch (
1109	(HV *)SvRV (GvSV (coro_current)),
1110	"yieldstack", sizeof ("yieldstack") - 1,
1111	0
1112	);
1113
1114	/* set up @_ -- ugly */
1115	av_clear (defav);
1116	av_fill (defav, items - 1);
1117	while (items--)
1118	av_store (defav, items, SvREFCNT_inc (ST(items)));
1119
1120	sv = av_pop ((AV *)SvRV (yieldstack));
1121	prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1122	next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1123	SvREFCNT_dec (sv);
1124
1125	coro_state_transfer (aTHX_ prev, next, 0);
1126	}
1127		1178
1128	MODULE = Coro::State PACKAGE = Coro	1179	MODULE = Coro::State PACKAGE = Coro
1129		1180
1130	BOOT:	1181	BOOT:
1131	{	1182	{
…		…
1138	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1189	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1139	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1190	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1140	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1191	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1141	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1192	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1142		1193
1143	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1194	coro_current = get_sv ("Coro::current", FALSE);
1144	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1195	SvREADONLY_on (coro_current);
1145		1196
1146	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1197	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1147	coro_ready[i] = newAV ();	1198	coro_ready[i] = newAV ();
1148		1199
1149	{	1200	{
1150	SV *sv = perl_get_sv("Coro::API", 1);	1201	SV *sv = perl_get_sv("Coro::API", 1);
1151		1202
1152	coroapi.schedule = api_schedule;	1203	coroapi.schedule = api_schedule;
		1204	coroapi.save = api_save;
1153	coroapi.cede = api_cede;	1205	coroapi.cede = api_cede;
1154	coroapi.ready = api_ready;	1206	coroapi.ready = api_ready;
		1207	coroapi.is_ready = api_is_ready;
1155	coroapi.nready = &coro_nready;	1208	coroapi.nready = &coro_nready;
1156	coroapi.current = coro_current;	1209	coroapi.current = coro_current;
1157		1210
1158	GCoroAPI = &coroapi;	1211	GCoroAPI = &coroapi;
1159	sv_setiv (sv, (IV)&coroapi);	1212	sv_setiv (sv, (IV)&coroapi);
1160	SvREADONLY_on (sv);	1213	SvREADONLY_on (sv);
1161	}	1214	}
1162	}	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)));
1163		1223
1164	int	1224	int
1165	prio (Coro::State coro, int newprio = 0)	1225	prio (Coro::State coro, int newprio = 0)
1166	ALIAS:	1226	ALIAS:
1167	nice = 1	1227	nice = 1
…		…
1179		1239
1180	coro->prio = newprio;	1240	coro->prio = newprio;
1181	}	1241	}
1182	}	1242	}
1183		1243
1184	void	1244	SV *
1185	ready (SV *self)	1245	ready (SV *self)
1186	PROTOTYPE: $	1246	PROTOTYPE: $
1187	CODE:	1247	CODE:
1188	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
1189		1259
1190	int	1260	int
1191	nready (...)	1261	nready (...)
1192	PROTOTYPE:	1262	PROTOTYPE:
1193	CODE:	1263	CODE:
…		…
1199		1269
1200	SV *	1270	SV *
1201	_get_state ()	1271	_get_state ()
1202	CODE:	1272	CODE:
1203	{	1273	{
1204	struct {	1274	struct io_state *data;
1205	int errorno;
1206	int laststype;
1207	int laststatval;
1208	Stat_t statcache;
1209	} data;
1210		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
1211	data.errorno = errno;	1281	data->errorno = errno;
1212	data.laststype = PL_laststype;	1282	data->laststype = PL_laststype;
1213	data.laststatval = PL_laststatval;	1283	data->laststatval = PL_laststatval;
1214	data.statcache = PL_statcache;	1284	data->statcache = PL_statcache;
1215
1216	RETVAL = newSVpvn ((char *)&data, sizeof data);
1217	}	1285	}
1218	OUTPUT:	1286	OUTPUT:
1219	RETVAL	1287	RETVAL
1220		1288
1221	void	1289	void
1222	_set_state (char *data_)	1290	_set_state (char *data_)
1223	PROTOTYPE: $	1291	PROTOTYPE: $
1224	CODE:	1292	CODE:
1225	{	1293	{
1226	struct {	1294	struct io_state data = (void )data_;
1227	int errorno;
1228	int laststype;
1229	int laststatval;
1230	Stat_t statcache;
1231	} data = (void )data_;
1232		1295
1233	errno = data->errorno;	1296	errno = data->errorno;
1234	PL_laststype = data->laststype;	1297	PL_laststype = data->laststype;
1235	PL_laststatval = data->laststatval;	1298	PL_laststatval = data->laststatval;
1236	PL_statcache = data->statcache;	1299	PL_statcache = data->statcache;
1237	}	1300	}
		1301

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Comparing Coro/Coro/State.xs (file contents): Revision 1.92 by root, Sun Nov 26 02:16:19 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 1.92 by root, Sun Nov 26 02:16:19 2006 UTC vs.
Revision 1.123 by root, Mon Dec 4 21:56:00 2006 UTC