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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.103 by root, Mon Nov 27 01:33:30 2006 UTC vs.
Revision 1.139 by root, Sun Jan 14 21:13:41 2007 UTC

…		…
3	#include "EXTERN.h"	3	#include "EXTERN.h"
4	#include "perl.h"	4	#include "perl.h"
5	#include "XSUB.h"	5	#include "XSUB.h"
6		6
7	#include "patchlevel.h"	7	#include "patchlevel.h"
		8
		9	#include <stdio.h>
		10	#include <errno.h>
		11	#include <assert.h>
		12
		13	#ifdef HAVE_MMAP
		14	# include <unistd.h>
		15	# include <sys/mman.h>
		16	# ifndef MAP_ANONYMOUS
		17	# ifdef MAP_ANON
		18	# define MAP_ANONYMOUS MAP_ANON
		19	# else
		20	# undef HAVE_MMAP
		21	# endif
		22	# endif
		23	# include <limits.h>
		24	# ifndef PAGESIZE
		25	# define PAGESIZE pagesize
		26	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		27	static long pagesize;
		28	# else
		29	# define BOOT_PAGESIZE (void)0
		30	# endif
		31	#else
		32	# define PAGESIZE 0
		33	# define BOOT_PAGESIZE (void)0
		34	#endif
		35
		36	#if USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	#endif
		39
		40	/* the maximum number of idle cctx that will be pooled */
		41	#define MAX_IDLE_CCTX 8
8		42
9	#define PERL_VERSION_ATLEAST(a,b,c) \	43	#define PERL_VERSION_ATLEAST(a,b,c) \
10	(PERL_REVISION > (a) \	44	(PERL_REVISION > (a) \
11	\|\| (PERL_REVISION == (a) \	45	\|\| (PERL_REVISION == (a) \
12	&& (PERL_VERSION > (b) \	46	&& (PERL_VERSION > (b) \
…		…
31	# ifndef IS_PADCONST	65	# ifndef IS_PADCONST
32	# define IS_PADCONST(v) 0	66	# define IS_PADCONST(v) 0
33	# endif	67	# endif
34	#endif	68	#endif
35		69
36	#include <stdio.h>	70	/* 5.8.7 */
37	#include <errno.h>	71	#ifndef SvRV_set
		72	# define SvRV_set(s,v) SvRV(s) = (v)
		73	#endif
38		74
39	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40	# undef STACKGUARD	76	# undef STACKGUARD
41	#endif	77	#endif
42		78
43	#ifndef STACKGUARD	79	#ifndef STACKGUARD
44	# define STACKGUARD 0	80	# define STACKGUARD 0
45	#endif	81	#endif
46		82
47	#ifdef HAVE_MMAP	83	/* prefer perl internal functions over our own? */
48	# include <unistd.h>	84	#ifndef PREFER_PERL_FUNCTIONS
49	# include <sys/mman.h>	85	# define PREFER_PERL_FUNCTIONS 0
50	# ifndef MAP_ANONYMOUS
51	# ifdef MAP_ANON
52	# define MAP_ANONYMOUS MAP_ANON
53	# else
54	# undef HAVE_MMAP
55	# endif
56	# endif
57	# include <limits.h>
58	# ifndef PAGESIZE
59	# define PAGESIZE pagesize
60	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
61	static long pagesize;
62	# else
63	# define BOOT_PAGESIZE
64	# endif
65	#endif	86	#endif
66		87
67	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* The next macro should declare a variable stacklevel that contains and approximation
68	* to the current C stack pointer. Its property is that it changes with each call	89	* to the current C stack pointer. Its property is that it changes with each call
69	* and should be unique. */	90	* and should be unique. */
…		…
72		93
73	#define IN_DESTRUCT (PL_main_cv == Nullcv)	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
74		95
75	#if __GNUC__ >= 3	96	#if __GNUC__ >= 3
76	# define attribute(x) __attribute__(x)	97	# define attribute(x) __attribute__(x)
		98	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
77	#else	99	#else
78	# define attribute(x)	100	# define attribute(x)
		101	# define BARRIER
79	#endif	102	#endif
80		103
81	#define NOINLINE attribute ((noinline))	104	#define NOINLINE attribute ((noinline))
82		105
83	#include "CoroAPI.h"	106	#include "CoroAPI.h"
84
85	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
86		107
87	#ifdef USE_ITHREADS	108	#ifdef USE_ITHREADS
88	static perl_mutex coro_mutex;	109	static perl_mutex coro_mutex;
89	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	110	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
90	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	111	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
91	#else	112	#else
92	# define LOCK (void)0	113	# define LOCK (void)0
93	# define UNLOCK (void)0	114	# define UNLOCK (void)0
94	#endif	115	#endif
95		116
		117	/* helper storage struct for Coro::AIO */
		118	struct io_state
		119	{
		120	int errorno;
		121	I32 laststype;
		122	int laststatval;
		123	Stat_t statcache;
		124	};
		125
96	static struct CoroAPI coroapi;	126	static struct CoroAPI coroapi;
97	static AV main_mainstack; / used to differentiate between $main and others */	127	static AV main_mainstack; / used to differentiate between $main and others */
98	static HV coro_state_stash, coro_stash;	128	static HV coro_state_stash, coro_stash;
99	static SV coro_mortal; / will be freed after next transfer */	129	static SV coro_mortal; / will be freed after next transfer */
100		130
		131	static struct coro_cctx *cctx_first;
		132	static int cctx_count, cctx_idle;
		133
101	/* this is a structure representing a c-level coroutine */	134	/* this is a structure representing a c-level coroutine */
102	typedef struct coro_stack {	135	typedef struct coro_cctx {
103	struct coro_stack *next;	136	struct coro_cctx *next;
104		137
105	/* the stack */	138	/* the stack */
106	void *sptr;	139	void *sptr;
107	long ssize; /* positive == mmap, otherwise malloc */	140	long ssize; /* positive == mmap, otherwise malloc */
108		141
109	/* cpu state */	142	/* cpu state */
110	void idle_sp; / sp of top-level transfer/schedule/cede call */	143	void idle_sp; / sp of top-level transfer/schedule/cede call */
		144	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
111	JMPENV *top_env;	145	JMPENV *top_env;
112	coro_context cctx;	146	coro_context cctx;
113	} coro_stack;	147
		148	int inuse;
		149
		150	#if USE_VALGRIND
		151	int valgrind_id;
		152	#endif
		153	} coro_cctx;
		154
		155	enum {
		156	CF_RUNNING = 0x0001, /* coroutine is running */
		157	CF_READY = 0x0002, /* coroutine is ready */
		158	CF_NEW = 0x0004, /* has never been switched to */
		159	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		160	};
114		161
115	/* this is a structure representing a perl-level coroutine */	162	/* this is a structure representing a perl-level coroutine */
116	struct coro {	163	struct coro {
117	/* the c coroutine allocated to this perl coroutine, if any */	164	/* the c coroutine allocated to this perl coroutine, if any */
118	coro_stack *stack;	165	coro_cctx *cctx;
119		166
120	/* data associated with this coroutine (initial args) */	167	/* data associated with this coroutine (initial args) */
121	AV *args;	168	AV *args;
122	int refcnt;	169	int refcnt;
		170	int save; /* CORO_SAVE flags */
		171	int flags; /* CF_ flags */
123		172
124	/* optionally saved, might be zero */	173	/* optionally saved, might be zero */
125	AV *defav;	174	AV defav; / @_ */
126	SV *defsv;	175	SV defsv; / $_ */
127	SV *errsv;	176	SV errsv; / $@ */
		177	SV irssv; / $/ */
		178	SV irssv_sv; / real $/ cache */
128		179
129	/* saved global state not related to stacks */	180	#define VAR(name,type) type name;
130	U8 dowarn;	181	# include "state.h"
131	I32 in_eval;	182	#undef VAR
132
133	/* the stacks and related info (callchain etc..) */
134	PERL_SI *curstackinfo;
135	AV *curstack;
136	AV *mainstack;
137	SV **stack_sp;
138	OP *op;
139	SV **curpad;
140	AV *comppad;
141	CV *compcv;
142	SV **stack_base;
143	SV **stack_max;
144	SV **tmps_stack;
145	I32 tmps_floor;
146	I32 tmps_ix;
147	I32 tmps_max;
148	I32 *markstack;
149	I32 *markstack_ptr;
150	I32 *markstack_max;
151	I32 *scopestack;
152	I32 scopestack_ix;
153	I32 scopestack_max;
154	ANY *savestack;
155	I32 savestack_ix;
156	I32 savestack_max;
157	OP **retstack;
158	I32 retstack_ix;
159	I32 retstack_max;
160	PMOP *curpm;
161	COP *curcop;
162		183
163	/* coro process data */	184	/* coro process data */
164	int prio;	185	int prio;
165	};	186	};
166		187
167	typedef struct coro *Coro__State;	188	typedef struct coro *Coro__State;
168	typedef struct coro *Coro__State_or_hashref;	189	typedef struct coro *Coro__State_or_hashref;
		190
		191	/ Coro ******************************************************************/
		192
		193	#define PRIO_MAX 3
		194	#define PRIO_HIGH 1
		195	#define PRIO_NORMAL 0
		196	#define PRIO_LOW -1
		197	#define PRIO_IDLE -3
		198	#define PRIO_MIN -4
		199
		200	/* for Coro.pm */
		201	static SV *coro_current;
		202	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		203	static int coro_nready;
		204
		205	/ lowlevel stuff ********************************************************/
169		206
170	static AV *	207	static AV *
171	coro_clone_padlist (CV *cv)	208	coro_clone_padlist (CV *cv)
172	{	209	{
173	AV *padlist = CvPADLIST (cv);	210	AV *padlist = CvPADLIST (cv);
…		…
230		267
231	#define PERL_MAGIC_coro PERL_MAGIC_ext	268	#define PERL_MAGIC_coro PERL_MAGIC_ext
232		269
233	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	270	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
234		271
		272	#define CORO_MAGIC(cv) \
		273	SvMAGIC (cv) \
		274	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		275	? SvMAGIC (cv) \
		276	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		277	: 0
		278
235	/* the next two functions merely cache the padlists */	279	/* the next two functions merely cache the padlists */
236	static void	280	static void
237	get_padlist (CV *cv)	281	get_padlist (CV *cv)
238	{	282	{
239	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	283	MAGIC *mg = CORO_MAGIC (cv);
		284	AV *av;
240		285
241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	286	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	287	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	288	else
244	{	289	{
245	#if 0	290	#if PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	291	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	292	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	293	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	294	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	295	SvREFCNT_dec (cp);
…		…
255	}	300	}
256		301
257	static void	302	static void
258	put_padlist (CV *cv)	303	put_padlist (CV *cv)
259	{	304	{
260	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	305	MAGIC *mg = CORO_MAGIC (cv);
		306	AV *av;
261		307
262	if (!mg)	308	if (!mg)
263	{	309	{
264	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	310	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	311	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266	mg->mg_virtual = &vtbl_coro;	312	mg->mg_virtual = &vtbl_coro;
267	mg->mg_obj = (SV *)newAV ();	313	mg->mg_obj = (SV *)newAV ();
268	}	314	}
269		315
270	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	316	av = (AV *)mg->mg_obj;
		317
		318	if (AvFILLp (av) >= AvMAX (av))
		319	av_extend (av, AvMAX (av) + 1);
		320
		321	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
271	}	322	}
		323
		324	/ load & save, init *****************************************************/
272		325
273	#define SB do {	326	#define SB do {
274	#define SE } while (0)	327	#define SE } while (0)
275		328
276	#define LOAD(state) load_state((state));
277	#define SAVE(state,flags) save_state((state),(flags));
278
279	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	329	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
280		330
281	static void	331	static void
282	load_state(Coro__State c)	332	load_perl (Coro__State c)
283	{	333	{
284	PL_dowarn = c->dowarn;	334	#define VAR(name,type) PL_ ## name = c->name;
285	PL_in_eval = c->in_eval;	335	# include "state.h"
286		336	#undef VAR
287	PL_curstackinfo = c->curstackinfo;
288	PL_curstack = c->curstack;
289	PL_mainstack = c->mainstack;
290	PL_stack_sp = c->stack_sp;
291	PL_op = c->op;
292	PL_curpad = c->curpad;
293	PL_comppad = c->comppad;
294	PL_compcv = c->compcv;
295	PL_stack_base = c->stack_base;
296	PL_stack_max = c->stack_max;
297	PL_tmps_stack = c->tmps_stack;
298	PL_tmps_floor = c->tmps_floor;
299	PL_tmps_ix = c->tmps_ix;
300	PL_tmps_max = c->tmps_max;
301	PL_markstack = c->markstack;
302	PL_markstack_ptr = c->markstack_ptr;
303	PL_markstack_max = c->markstack_max;
304	PL_scopestack = c->scopestack;
305	PL_scopestack_ix = c->scopestack_ix;
306	PL_scopestack_max = c->scopestack_max;
307	PL_savestack = c->savestack;
308	PL_savestack_ix = c->savestack_ix;
309	PL_savestack_max = c->savestack_max;
310	#if !PERL_VERSION_ATLEAST (5,9,0)
311	PL_retstack = c->retstack;
312	PL_retstack_ix = c->retstack_ix;
313	PL_retstack_max = c->retstack_max;
314	#endif
315	PL_curpm = c->curpm;
316	PL_curcop = c->curcop;
317		337
318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	338	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	339	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	340	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		341	if (c->irssv)
		342	{
		343	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
		344	SvREFCNT_dec (c->irssv);
		345	else
		346	{
		347	REPLACE_SV (PL_rs, c->irssv);
		348	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		349	sv_setsv (c->irssv_sv, PL_rs);
		350	}
		351	}
321		352
322	{	353	{
323	dSP;	354	dSP;
324	CV *cv;	355	CV *cv;
325		356
326	/* now do the ugly restore mess */	357	/* now do the ugly restore mess */
327	while ((cv = (CV *)POPs))	358	while ((cv = (CV *)POPs))
328	{	359	{
329	AV padlist = (AV )POPs;
330
331	if (padlist)
332	{
333	put_padlist (cv); /* mark this padlist as available */	360	put_padlist (cv); /* mark this padlist as available */
334	CvPADLIST(cv) = padlist;	361	CvDEPTH (cv) = PTR2IV (POPs);
335	}	362	CvPADLIST (cv) = (AV *)POPs;
336
337	++CvDEPTH(cv);
338	}	363	}
339		364
340	PUTBACK;	365	PUTBACK;
341	}	366	}
342	}	367	}
343		368
344	static void	369	static void
345	save_state(Coro__State c, int flags)	370	save_perl (Coro__State c)
346	{	371	{
347	{	372	{
348	dSP;	373	dSP;
349	I32 cxix = cxstack_ix;	374	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	375	PERL_CONTEXT *ccstk = cxstack;
…		…
353	/*	378	/*
354	* the worst thing you can imagine happens first - we have to save	379	* the worst thing you can imagine happens first - we have to save
355	* (and reinitialize) all cv's in the whole callchain :(	380	* (and reinitialize) all cv's in the whole callchain :(
356	*/	381	*/
357		382
		383	EXTEND (SP, 3 + 1);
358	PUSHs (Nullsv);	384	PUSHs (Nullsv);
359	/* this loop was inspired by pp_caller */	385	/* this loop was inspired by pp_caller */
360	for (;;)	386	for (;;)
361	{	387	{
362	while (cxix >= 0)	388	while (cxix >= 0)
363	{	389	{
364	PERL_CONTEXT *cx = &ccstk[cxix--];	390	PERL_CONTEXT *cx = &ccstk[cxix--];
365		391
366	if (CxTYPE(cx) == CXt_SUB)	392	if (CxTYPE (cx) == CXt_SUB)
367	{	393	{
368	CV *cv = cx->blk_sub.cv;	394	CV *cv = cx->blk_sub.cv;
		395
369	if (CvDEPTH(cv))	396	if (CvDEPTH (cv))
370	{	397	{
371	EXTEND (SP, CvDEPTH(cv)*2);	398	EXTEND (SP, 3);
372
373	while (--CvDEPTH(cv))
374	{
375	/* this tells the restore code to increment CvDEPTH */
376	PUSHs (Nullsv);
377	PUSHs ((SV *)cv);
378	}
379
380	PUSHs ((SV *)CvPADLIST(cv));	399	PUSHs ((SV *)CvPADLIST (cv));
		400	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
381	PUSHs ((SV *)cv);	401	PUSHs ((SV *)cv);
382		402
		403	CvDEPTH (cv) = 0;
383	get_padlist (cv);	404	get_padlist (cv);
384	}	405	}
385	}	406	}
386	#ifdef CXt_FORMAT
387	else if (CxTYPE(cx) == CXt_FORMAT)
388	{
389	/* I never used formats, so how should I know how these are implemented? */
390	/* my bold guess is as a simple, plain sub... */
391	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
392	}
393	#endif
394	}	407	}
395		408
396	if (top_si->si_type == PERLSI_MAIN)	409	if (top_si->si_type == PERLSI_MAIN)
397	break;	410	break;
398		411
…		…
402	}	415	}
403		416
404	PUTBACK;	417	PUTBACK;
405	}	418	}
406		419
407	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	420	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
408	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	421	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
409	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	422	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		423	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
410		424
411	c->dowarn = PL_dowarn;	425	#define VAR(name,type)c->name = PL_ ## name;
412	c->in_eval = PL_in_eval;	426	# include "state.h"
413		427	#undef VAR
414	c->curstackinfo = PL_curstackinfo;
415	c->curstack = PL_curstack;
416	c->mainstack = PL_mainstack;
417	c->stack_sp = PL_stack_sp;
418	c->op = PL_op;
419	c->curpad = PL_curpad;
420	c->comppad = PL_comppad;
421	c->compcv = PL_compcv;
422	c->stack_base = PL_stack_base;
423	c->stack_max = PL_stack_max;
424	c->tmps_stack = PL_tmps_stack;
425	c->tmps_floor = PL_tmps_floor;
426	c->tmps_ix = PL_tmps_ix;
427	c->tmps_max = PL_tmps_max;
428	c->markstack = PL_markstack;
429	c->markstack_ptr = PL_markstack_ptr;
430	c->markstack_max = PL_markstack_max;
431	c->scopestack = PL_scopestack;
432	c->scopestack_ix = PL_scopestack_ix;
433	c->scopestack_max = PL_scopestack_max;
434	c->savestack = PL_savestack;
435	c->savestack_ix = PL_savestack_ix;
436	c->savestack_max = PL_savestack_max;
437	#if !PERL_VERSION_ATLEAST (5,9,0)
438	c->retstack = PL_retstack;
439	c->retstack_ix = PL_retstack_ix;
440	c->retstack_max = PL_retstack_max;
441	#endif
442	c->curpm = PL_curpm;
443	c->curcop = PL_curcop;
444	}	428	}
445		429
446	/*	430	/*
447	* allocate various perl stacks. This is an exact copy	431	* allocate various perl stacks. This is an exact copy
448	* of perl.c:init_stacks, except that it uses less memory	432	* of perl.c:init_stacks, except that it uses less memory
449	* on the (sometimes correct) assumption that coroutines do	433	* on the (sometimes correct) assumption that coroutines do
450	* not usually need a lot of stackspace.	434	* not usually need a lot of stackspace.
451	*/	435	*/
		436	#if PREFER_PERL_FUNCTIONS
		437	# define coro_init_stacks init_stacks
		438	#else
452	static void	439	static void
453	coro_init_stacks ()	440	coro_init_stacks ()
454	{	441	{
455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	442	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
456	PL_curstackinfo->si_type = PERLSI_MAIN;	443	PL_curstackinfo->si_type = PERLSI_MAIN;
457	PL_curstack = PL_curstackinfo->si_stack;	444	PL_curstack = PL_curstackinfo->si_stack;
458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	445	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459		446
460	PL_stack_base = AvARRAY(PL_curstack);	447	PL_stack_base = AvARRAY(PL_curstack);
461	PL_stack_sp = PL_stack_base;	448	PL_stack_sp = PL_stack_base;
462	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	449	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463		450
464	New(50,PL_tmps_stack,96,SV*);	451	New(50,PL_tmps_stack,128,SV*);
465	PL_tmps_floor = -1;	452	PL_tmps_floor = -1;
466	PL_tmps_ix = -1;	453	PL_tmps_ix = -1;
467	PL_tmps_max = 96;	454	PL_tmps_max = 128;
468		455
469	New(54,PL_markstack,16,I32);	456	New(54,PL_markstack,32,I32);
470	PL_markstack_ptr = PL_markstack;	457	PL_markstack_ptr = PL_markstack;
471	PL_markstack_max = PL_markstack + 16;	458	PL_markstack_max = PL_markstack + 32;
472		459
473	#ifdef SET_MARK_OFFSET	460	#ifdef SET_MARK_OFFSET
474	SET_MARK_OFFSET;	461	SET_MARK_OFFSET;
475	#endif	462	#endif
476		463
477	New(54,PL_scopestack,16,I32);	464	New(54,PL_scopestack,32,I32);
478	PL_scopestack_ix = 0;	465	PL_scopestack_ix = 0;
479	PL_scopestack_max = 16;	466	PL_scopestack_max = 32;
480		467
481	New(54,PL_savestack,96,ANY);	468	New(54,PL_savestack,64,ANY);
482	PL_savestack_ix = 0;	469	PL_savestack_ix = 0;
483	PL_savestack_max = 96;	470	PL_savestack_max = 64;
484		471
485	#if !PERL_VERSION_ATLEAST (5,9,0)	472	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	473	New(54,PL_retstack,16,OP*);
487	PL_retstack_ix = 0;	474	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	475	PL_retstack_max = 16;
489	#endif	476	#endif
490	}	477	}
		478	#endif
491		479
492	/*	480	/*
493	* destroy the stacks, the callchain etc...	481	* destroy the stacks, the callchain etc...
494	*/	482	*/
495	static void	483	static void
496	coro_destroy_stacks()	484	coro_destroy_stacks ()
497	{	485	{
498	if (!IN_DESTRUCT)	486	if (!IN_DESTRUCT)
499	{	487	{
500	/* is this ugly, I ask? */	488	/* restore all saved variables and stuff */
501	LEAVE_SCOPE (0);	489	LEAVE_SCOPE (0);
		490	assert (PL_tmps_floor == -1);
502		491
503	/* sure it is, but more important: is it correct?? :/ */	492	/* free all temporaries */
504	FREETMPS;	493	FREETMPS;
		494	assert (PL_tmps_ix == -1);
505		495
		496	/* unwind all extra stacks */
506	/POPSTACK_TO (PL_mainstack);//D//use/	497	POPSTACK_TO (PL_mainstack);
		498
		499	/* unwind main stack */
		500	dounwind (-1);
507	}	501	}
508		502
509	while (PL_curstackinfo->si_next)	503	while (PL_curstackinfo->si_next)
510	PL_curstackinfo = PL_curstackinfo->si_next;	504	PL_curstackinfo = PL_curstackinfo->si_next;
511		505
512	while (PL_curstackinfo)	506	while (PL_curstackinfo)
513	{	507	{
514	PERL_SI *p = PL_curstackinfo->si_prev;	508	PERL_SI *p = PL_curstackinfo->si_prev;
515		509
516	{ /D//remove/
517	dSP;
518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519	PUTBACK; /* possibly superfluous */
520	}
521
522	if (!IN_DESTRUCT)	510	if (!IN_DESTRUCT)
523	{
524	dounwind (-1);/D//remove/
525	SvREFCNT_dec (PL_curstackinfo->si_stack);	511	SvREFCNT_dec (PL_curstackinfo->si_stack);
526	}
527		512
528	Safefree (PL_curstackinfo->si_cxstack);	513	Safefree (PL_curstackinfo->si_cxstack);
529	Safefree (PL_curstackinfo);	514	Safefree (PL_curstackinfo);
530	PL_curstackinfo = p;	515	PL_curstackinfo = p;
531	}	516	}
…		…
537	#if !PERL_VERSION_ATLEAST (5,9,0)	522	#if !PERL_VERSION_ATLEAST (5,9,0)
538	Safefree (PL_retstack);	523	Safefree (PL_retstack);
539	#endif	524	#endif
540	}	525	}
541		526
		527	/ coroutine stack handling **********************************************/
		528
542	static void	529	static void
543	setup_coro (struct coro *coro)	530	setup_coro (struct coro *coro)
544	{	531	{
545	/*	532	/*
546	* emulate part of the perl startup here.	533	* emulate part of the perl startup here.
547	*/	534	*/
548		535
549	coro_init_stacks ();	536	coro_init_stacks ();
550		537
551	PL_curcop = 0;	538	PL_curcop = &PL_compiling;
552	PL_in_eval = 0;	539	PL_in_eval = EVAL_NULL;
553	PL_curpm = 0;	540	PL_curpm = 0;
		541	PL_localizing = 0;
		542	PL_dirty = 0;
		543	PL_restartop = 0;
554		544
555	{	545	{
556	dSP;	546	dSP;
557	LOGOP myop;	547	LOGOP myop;
558		548
559	/* I have no idea why this is needed, but it is */
560	PUSHMARK (SP);
561
562	SvREFCNT_dec (GvAV (PL_defgv));	549	SvREFCNT_dec (GvAV (PL_defgv));
563	GvAV (PL_defgv) = coro->args; coro->args = 0;	550	GvAV (PL_defgv) = coro->args; coro->args = 0;
564		551
565	Zero (&myop, 1, LOGOP);	552	Zero (&myop, 1, LOGOP);
566	myop.op_next = Nullop;	553	myop.op_next = Nullop;
567	myop.op_flags = OPf_WANT_VOID;	554	myop.op_flags = OPf_WANT_VOID;
568		555
		556	PUSHMARK (SP);
		557	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		558	PUTBACK;
569	PL_op = (OP *)&myop;	559	PL_op = (OP *)&myop;
570
571	PUSHMARK (SP);
572	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
573	PUTBACK;
574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	560	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
575	SPAGAIN;	561	SPAGAIN;
576
577	ENTER; /* necessary e.g. for dounwind */
578	}	562	}
		563
		564	ENTER; /* necessary e.g. for dounwind */
579	}	565	}
580		566
581	static void	567	static void
582	free_coro_mortal ()	568	free_coro_mortal ()
583	{	569	{
…		…
586	SvREFCNT_dec (coro_mortal);	572	SvREFCNT_dec (coro_mortal);
587	coro_mortal = 0;	573	coro_mortal = 0;
588	}	574	}
589	}	575	}
590		576
		577	/* inject a fake call to Coro::State::_cctx_init into the execution */
591	static void NOINLINE	578	static void NOINLINE
592	prepare_cctx (coro_stack *cctx)	579	prepare_cctx (coro_cctx *cctx)
593	{	580	{
594	dSP;	581	dSP;
595	LOGOP myop;	582	LOGOP myop;
596		583
597	Zero (&myop, 1, LOGOP);	584	Zero (&myop, 1, LOGOP);
598	myop.op_next = PL_op;	585	myop.op_next = PL_op;
599	myop.op_flags = OPf_WANT_VOID;	586	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
600
601	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
602		587
603	PUSHMARK (SP);	588	PUSHMARK (SP);
		589	EXTEND (SP, 2);
		590	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
604	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	591	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
605	PUTBACK;	592	PUTBACK;
		593	PL_op = (OP *)&myop;
606	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	594	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
607	SPAGAIN;	595	SPAGAIN;
608	}	596	}
609		597
610	static void	598	static void
611	coro_run (void *arg)	599	coro_run (void *arg)
612	{	600	{
613	/* coro_run is the alternative epilogue of transfer() */	601	/* coro_run is the alternative tail of transfer(), so unlock here. */
614	UNLOCK;	602	UNLOCK;
615		603
616	/*	604	/*
617	* this is a _very_ stripped down perl interpreter ;)	605	* this is a _very_ stripped down perl interpreter ;)
618	*/	606	*/
619	PL_top_env = &PL_start_env;	607	PL_top_env = &PL_start_env;
		608
620	/* inject call to cctx_init */	609	/* inject call to cctx_init */
621	prepare_cctx ((coro_stack *)arg);	610	prepare_cctx ((coro_cctx *)arg);
622		611
623	/* somebody will hit me for both perl_run and PL_restartop */	612	/* somebody will hit me for both perl_run and PL_restartop */
		613	PL_restartop = PL_op;
624	perl_run (PL_curinterp);	614	perl_run (PL_curinterp);
625		615
626	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);	616	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
627	abort ();	617	abort ();
628	}	618	}
629		619
630	static coro_stack *	620	static coro_cctx *
631	stack_new ()	621	cctx_new ()
632	{	622	{
633	coro_stack *stack;	623	coro_cctx *cctx;
634		624
		625	++cctx_count;
		626
635	New (0, stack, 1, coro_stack);	627	Newz (0, cctx, 1, coro_cctx);
636		628
637	#if HAVE_MMAP	629	#if HAVE_MMAP
638		630
639	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	631	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
640	/* mmap suppsedly does allocate-on-write for us */	632	/* mmap supposedly does allocate-on-write for us */
641	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	633	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
642		634
643	if (stack->sptr == (void *)-1)	635	if (cctx->sptr == (void *)-1)
644	{	636	{
645	perror ("FATAL: unable to mmap stack for coroutine");	637	perror ("FATAL: unable to mmap stack for coroutine");
646	_exit (EXIT_FAILURE);	638	_exit (EXIT_FAILURE);
647	}	639	}
648		640
649	# if STACKGUARD	641	# if STACKGUARD
650	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	642	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
651	# endif	643	# endif
652		644
653	#else	645	#else
654		646
655	stack->ssize = STACKSIZE * (long)sizeof (long);	647	cctx->ssize = STACKSIZE * (long)sizeof (long);
656	New (0, stack->sptr, STACKSIZE, long);	648	New (0, cctx->sptr, STACKSIZE, long);
657		649
658	if (!stack->sptr)	650	if (!cctx->sptr)
659	{	651	{
660	perror (stderr, "FATAL: unable to malloc stack for coroutine");	652	perror ("FATAL: unable to malloc stack for coroutine");
661	_exit (EXIT_FAILURE);	653	_exit (EXIT_FAILURE);
662	}	654	}
663		655
664	#endif	656	#endif
665		657
		658	#if USE_VALGRIND
		659	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		660	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		661	cctx->ssize + (char *)cctx->sptr
		662	);
		663	#endif
		664
666	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	665	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
667		666
668	return stack;	667	return cctx;
669	}	668	}
670		669
671	static void	670	static void
672	stack_free (coro_stack *stack)	671	cctx_destroy (coro_cctx *cctx)
673	{	672	{
674	if (!stack)	673	if (!cctx)
675	return;	674	return;
676		675
		676	--cctx_count;
		677
		678	#if USE_VALGRIND
		679	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		680	#endif
		681
677	#if HAVE_MMAP	682	#if HAVE_MMAP
678	munmap (stack->sptr, stack->ssize);	683	munmap (cctx->sptr, cctx->ssize);
679	#else	684	#else
680	Safefree (stack->sptr);	685	Safefree (cctx->sptr);
681	#endif	686	#endif
682		687
683	Safefree (stack);	688	Safefree (cctx);
684	}	689	}
685		690
686	static coro_stack *stack_first;
687	static int cctx_count, cctx_idle;
688
689	static coro_stack *	691	static coro_cctx *
690	stack_get ()	692	cctx_get ()
691	{	693	{
692	coro_stack *stack;	694	coro_cctx *cctx;
693		695
694	if (stack_first)	696	if (cctx_first)
695	{	697	{
		698	cctx = cctx_first;
		699	cctx_first = cctx->next;
696	--cctx_idle;	700	--cctx_idle;
697	stack = stack_first;
698	stack_first = stack->next;
699	}	701	}
700	else	702	else
701	{	703	{
702	++cctx_count;	704	cctx = cctx_new ();
703	stack = stack_new ();
704	PL_op = PL_op->op_next;	705	PL_op = PL_op->op_next;
705	}	706	}
706		707
707	return stack;	708	return cctx;
708	}	709	}
709		710
710	static void	711	static void
711	stack_put (coro_stack *stack)	712	cctx_put (coro_cctx *cctx)
712	{	713	{
		714	/* free another cctx if overlimit */
		715	if (cctx_idle >= MAX_IDLE_CCTX)
		716	{
		717	coro_cctx *first = cctx_first;
		718	cctx_first = first->next;
		719	--cctx_idle;
		720
		721	assert (!first->inuse);
		722	cctx_destroy (first);
		723	}
		724
713	++cctx_idle;	725	++cctx_idle;
714	stack->next = stack_first;	726	cctx->next = cctx_first;
715	stack_first = stack;	727	cctx_first = cctx;
716	}	728	}
		729
		730	/ coroutine switching ***************************************************/
717		731
718	/* never call directly, always through the coro_state_transfer global variable */	732	/* never call directly, always through the coro_state_transfer global variable */
719	static void NOINLINE	733	static void NOINLINE
720	transfer (struct coro prev, struct coro next, int flags)	734	transfer (struct coro prev, struct coro next)
721	{	735	{
722	dSTACKLEVEL;	736	dSTACKLEVEL;
723		737
724	/* sometimes transfer is only called to set idle_sp */	738	/* sometimes transfer is only called to set idle_sp */
725	if (flags == TRANSFER_SET_STACKLEVEL)	739	if (!next)
		740	{
726	((coro_stack *)prev)->idle_sp = STACKLEVEL;	741	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		742	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		743	}
727	else if (prev != next)	744	else if (prev != next)
728	{	745	{
729	coro_stack *prev__stack;	746	coro_cctx *prev__cctx;
		747
		748	if (prev->flags & CF_NEW)
		749	{
		750	/* create a new empty context */
		751	Newz (0, prev->cctx, 1, coro_cctx);
		752	prev->cctx->inuse = 1;
		753	prev->flags &= ~CF_NEW;
		754	prev->flags \|= CF_RUNNING;
		755	}
		756
		757	/TODO: must not croak here /
		758	if (!prev->flags & CF_RUNNING)
		759	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		760
		761	if (next->flags & CF_RUNNING)
		762	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		763
		764	if (next->flags & CF_DESTROYED)
		765	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		766
		767	prev->flags &= ~CF_RUNNING;
		768	next->flags \|= CF_RUNNING;
730		769
731	LOCK;	770	LOCK;
732		771
733	if (next->mainstack)	772	if (next->flags & CF_NEW)
734	{	773	{
735	/* coroutine already started */	774	/* need to start coroutine */
736	SAVE (prev, flags);	775	next->flags &= ~CF_NEW;
737	LOAD (next);	776	/* first get rid of the old state */
		777	save_perl (prev);
		778	/* setup coroutine call */
		779	setup_coro (next);
		780	/* need a new stack */
		781	assert (!next->cctx);
738	}	782	}
739	else	783	else
740	{	784	{
741	/* need to start coroutine */	785	/* coroutine already started */
742	/* first get rid of the old state */	786	save_perl (prev);
743	SAVE (prev, -1);	787	load_perl (next);
744	/* setup coroutine call */
745	setup_coro (next);
746	/* need a stack */
747	next->stack = 0;
748	}	788	}
749		789
750	if (!prev->stack)
751	/* create a new empty context */
752	Newz (0, prev->stack, 1, coro_stack);
753
754	prev__stack = prev->stack;	790	prev__cctx = prev->cctx;
755		791
756	/* possibly "free" the stack */	792	/* possibly "free" the cctx */
757	if (prev__stack->idle_sp == STACKLEVEL)	793	if (prev__cctx->idle_sp == STACKLEVEL)
758	{	794	{
759	stack_put (prev__stack);	795	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		796	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		797
760	prev->stack = 0;	798	prev->cctx = 0;
		799
		800	cctx_put (prev__cctx);
		801	prev__cctx->inuse = 0;
761	}	802	}
762		803
763	if (!next->stack)	804	if (!next->cctx)
764	next->stack = stack_get ();
765
766	if (prev__stack != next->stack)
767	{	805	{
768	prev__stack->top_env = PL_top_env;	806	next->cctx = cctx_get ();
769	PL_top_env = next->stack->top_env;	807	assert (!next->cctx->inuse);
770	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	808	next->cctx->inuse = 1;
771	}	809	}
772		810
		811	if (prev__cctx != next->cctx)
		812	{
		813	prev__cctx->top_env = PL_top_env;
		814	PL_top_env = next->cctx->top_env;
		815	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		816	}
		817
773	free_coro_mortal ();	818	free_coro_mortal ();
774
775	UNLOCK;	819	UNLOCK;
776	}	820	}
777	}	821	}
778		822
779	struct transfer_args	823	struct transfer_args
780	{	824	{
781	struct coro prev, next;	825	struct coro prev, next;
782	int flags;
783	};	826	};
784		827
785	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	828	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
786		829
		830	/ high level stuff ******************************************************/
		831
787	static void	832	static int
788	coro_state_destroy (struct coro *coro)	833	coro_state_destroy (struct coro *coro)
789	{	834	{
790	if (coro->refcnt--)	835	if (coro->flags & CF_DESTROYED)
791	return;	836	return 0;
		837
		838	coro->flags \|= CF_DESTROYED;
		839
		840	if (coro->flags & CF_READY)
		841	{
		842	/* reduce nready, as destroying a ready coro effectively unreadies it */
		843	/* alternative: look through all ready queues and remove the coro */
		844	LOCK;
		845	--coro_nready;
		846	UNLOCK;
		847	}
		848	else
		849	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
792		850
793	if (coro->mainstack && coro->mainstack != main_mainstack)	851	if (coro->mainstack && coro->mainstack != main_mainstack)
794	{	852	{
		853	assert (!(coro->flags & CF_RUNNING));
		854
795	struct coro temp;	855	struct coro temp;
		856	Zero (&temp, 1, struct coro);
		857	temp.save = CORO_SAVE_ALL;
796		858
797	SAVE ((&temp), TRANSFER_SAVE_ALL);	859	if (coro->flags & CF_RUNNING)
798	LOAD (coro);	860	croak ("FATAL: tried to destroy currently running coroutine");
		861
		862	save_perl (&temp);
		863	load_perl (coro);
799		864
800	coro_destroy_stacks ();	865	coro_destroy_stacks ();
801		866
802	LOAD ((&temp)); /* this will get rid of defsv etc.. */	867	load_perl (&temp); /* this will get rid of defsv etc.. */
803		868
804	coro->mainstack = 0;	869	coro->mainstack = 0;
805	}	870	}
806		871
807	stack_free (coro->stack);	872	cctx_destroy (coro->cctx);
808	SvREFCNT_dec (coro->args);	873	SvREFCNT_dec (coro->args);
809	Safefree (coro);	874
		875	return 1;
810	}	876	}
811		877
812	static int	878	static int
813	coro_state_clear (pTHX_ SV sv, MAGIC mg)	879	coro_state_free (pTHX_ SV sv, MAGIC mg)
814	{	880	{
815	struct coro coro = (struct coro )mg->mg_ptr;	881	struct coro coro = (struct coro )mg->mg_ptr;
816	mg->mg_ptr = 0;	882	mg->mg_ptr = 0;
817		883
		884	if (--coro->refcnt < 0)
		885	{
818	coro_state_destroy (coro);	886	coro_state_destroy (coro);
		887	Safefree (coro);
		888	}
819		889
820	return 0;	890	return 0;
821	}	891	}
822		892
823	static int	893	static int
…		…
830	return 0;	900	return 0;
831	}	901	}
832		902
833	static MGVTBL coro_state_vtbl = {	903	static MGVTBL coro_state_vtbl = {
834	0, 0, 0, 0,	904	0, 0, 0, 0,
835	coro_state_clear,	905	coro_state_free,
836	0,	906	0,
837	#ifdef MGf_DUP	907	#ifdef MGf_DUP
838	coro_state_dup,	908	coro_state_dup,
839	#else	909	#else
840	# define MGf_DUP 0	910	# define MGf_DUP 0
…		…
862	assert (mg->mg_type == PERL_MAGIC_ext);	932	assert (mg->mg_type == PERL_MAGIC_ext);
863	return (struct coro *)mg->mg_ptr;	933	return (struct coro *)mg->mg_ptr;
864	}	934	}
865		935
866	static void	936	static void
867	prepare_transfer (struct transfer_args ta, SV prev, SV *next, int flags)	937	prepare_transfer (struct transfer_args ta, SV prev_sv, SV *next_sv)
868	{	938	{
869	ta->prev = SvSTATE (prev);	939	ta->prev = SvSTATE (prev_sv);
870	ta->next = SvSTATE (next);	940	ta->next = SvSTATE (next_sv);
871	ta->flags = flags;
872	}	941	}
873		942
874	static void	943	static void
875	api_transfer (SV prev, SV next, int flags)	944	api_transfer (SV prev_sv, SV next_sv)
876	{	945	{
877	dTHX;
878	struct transfer_args ta;	946	struct transfer_args ta;
879		947
880	prepare_transfer (&ta, prev, next, flags);	948	prepare_transfer (&ta, prev_sv, next_sv);
881	TRANSFER (ta);	949	TRANSFER (ta);
882	}	950	}
883		951
		952	static int
		953	api_save (SV *coro_sv, int new_save)
		954	{
		955	struct coro *coro = SvSTATE (coro_sv);
		956	int old_save = coro->save;
		957
		958	if (new_save >= 0)
		959	coro->save = new_save;
		960
		961	return old_save;
		962	}
		963
884	/ Coro ******************************************************************/	964	/ Coro ******************************************************************/
885		965
886	#define PRIO_MAX 3
887	#define PRIO_HIGH 1
888	#define PRIO_NORMAL 0
889	#define PRIO_LOW -1
890	#define PRIO_IDLE -3
891	#define PRIO_MIN -4
892
893	/* for Coro.pm */
894	static GV coro_current, coro_idle;
895	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
896	static int coro_nready;
897
898	static void	966	static void
899	coro_enq (SV *sv)	967	coro_enq (SV *coro_sv)
900	{	968	{
901	int prio;
902
903	if (SvTYPE (sv) != SVt_PVHV)
904	croak ("Coro::ready tried to enqueue something that is not a coroutine");
905
906	prio = SvSTATE (sv)->prio;
907
908	av_push (coro_ready [prio - PRIO_MIN], sv);	969	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
909	coro_nready++;
910	}	970	}
911		971
912	static SV *	972	static SV *
913	coro_deq (int min_prio)	973	coro_deq (int min_prio)
914	{	974	{
…		…
918	if (min_prio < 0)	978	if (min_prio < 0)
919	min_prio = 0;	979	min_prio = 0;
920		980
921	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	981	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
922	if (AvFILLp (coro_ready [prio]) >= 0)	982	if (AvFILLp (coro_ready [prio]) >= 0)
923	{
924	coro_nready--;
925	return av_shift (coro_ready [prio]);	983	return av_shift (coro_ready [prio]);
926	}
927		984
928	return 0;	985	return 0;
929	}	986	}
930		987
931	static void	988	static int
932	api_ready (SV *coro)	989	api_ready (SV *coro_sv)
933	{	990	{
934	dTHX;	991	struct coro *coro;
935		992
936	if (SvROK (coro))	993	if (SvROK (coro_sv))
937	coro = SvRV (coro);	994	coro_sv = SvRV (coro_sv);
		995
		996	coro = SvSTATE (coro_sv);
		997
		998	if (coro->flags & CF_READY)
		999	return 0;
		1000
		1001	coro->flags \|= CF_READY;
938		1002
939	LOCK;	1003	LOCK;
940	coro_enq (SvREFCNT_inc (coro));	1004	coro_enq (SvREFCNT_inc (coro_sv));
		1005	++coro_nready;
941	UNLOCK;	1006	UNLOCK;
		1007
		1008	return 1;
		1009	}
		1010
		1011	static int
		1012	api_is_ready (SV *coro_sv)
		1013	{
		1014	return !!(SvSTATE (coro_sv)->flags & CF_READY);
942	}	1015	}
943		1016
944	static void	1017	static void
945	prepare_schedule (struct transfer_args *ta)	1018	prepare_schedule (struct transfer_args *ta)
946	{	1019	{
947	SV current, prev, *next;	1020	SV prev_sv, next_sv;
948
949	current = GvSV (coro_current);
950		1021
951	for (;;)	1022	for (;;)
952	{	1023	{
953	LOCK;	1024	LOCK;
954	next = coro_deq (PRIO_MIN);	1025	next_sv = coro_deq (PRIO_MIN);
		1026
		1027	/* nothing to schedule: call the idle handler */
		1028	if (!next_sv)
		1029	{
		1030	UNLOCK;
		1031	dSP;
		1032
		1033	ENTER;
		1034	SAVETMPS;
		1035
		1036	PUSHMARK (SP);
		1037	PUTBACK;
		1038	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1039
		1040	FREETMPS;
		1041	LEAVE;
		1042	continue;
		1043	}
		1044
		1045	ta->next = SvSTATE (next_sv);
		1046
		1047	/* cannot transfer to destroyed coros, skip and look for next */
		1048	if (ta->next->flags & CF_DESTROYED)
		1049	{
		1050	UNLOCK;
		1051	SvREFCNT_dec (next_sv);
		1052	/* coro_nready is already taken care of by destroy */
		1053	continue;
		1054	}
		1055
		1056	--coro_nready;
955	UNLOCK;	1057	UNLOCK;
956
957	if (next)
958	break;	1058	break;
959
960	{
961	dSP;
962
963	ENTER;
964	SAVETMPS;
965
966	PUSHMARK (SP);
967	PUTBACK;
968	call_sv (GvSV (coro_idle), G_DISCARD);
969
970	FREETMPS;
971	LEAVE;
972	}	1059	}
973	}
974
975	prev = SvRV (current);
976	SvRV (current) = next;
977		1060
978	/* free this only after the transfer */	1061	/* free this only after the transfer */
		1062	prev_sv = SvRV (coro_current);
		1063	SvRV_set (coro_current, next_sv);
		1064	ta->prev = SvSTATE (prev_sv);
		1065
		1066	assert (ta->next->flags & CF_READY);
		1067	ta->next->flags &= ~CF_READY;
		1068
979	LOCK;	1069	LOCK;
980	free_coro_mortal ();	1070	free_coro_mortal ();
		1071	coro_mortal = prev_sv;
981	UNLOCK;	1072	UNLOCK;
982	coro_mortal = prev;
983
984	ta->prev = SvSTATE (prev);
985	ta->next = SvSTATE (next);
986	ta->flags = TRANSFER_SAVE_ALL;
987	}	1073	}
988		1074
989	static void	1075	static void
990	prepare_cede (struct transfer_args *ta)	1076	prepare_cede (struct transfer_args *ta)
991	{	1077	{
992	LOCK;	1078	api_ready (coro_current);
993	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
994	UNLOCK;
995
996	prepare_schedule (ta);	1079	prepare_schedule (ta);
997	}	1080	}
998		1081
		1082	static int
		1083	prepare_cede_notself (struct transfer_args *ta)
		1084	{
		1085	if (coro_nready)
		1086	{
		1087	SV *prev = SvRV (coro_current);
		1088	prepare_schedule (ta);
		1089	api_ready (prev);
		1090	return 1;
		1091	}
		1092	else
		1093	return 0;
		1094	}
		1095
999	static void	1096	static void
1000	api_schedule (void)	1097	api_schedule (void)
1001	{	1098	{
1002	dTHX;
1003	struct transfer_args ta;	1099	struct transfer_args ta;
1004		1100
1005	prepare_schedule (&ta);	1101	prepare_schedule (&ta);
1006	TRANSFER (ta);	1102	TRANSFER (ta);
1007	}	1103	}
1008		1104
1009	static void	1105	static int
1010	api_cede (void)	1106	api_cede (void)
1011	{	1107	{
1012	dTHX;
1013	struct transfer_args ta;	1108	struct transfer_args ta;
1014		1109
1015	prepare_cede (&ta);	1110	prepare_cede (&ta);
		1111
		1112	if (ta.prev != ta.next)
		1113	{
1016	TRANSFER (ta);	1114	TRANSFER (ta);
		1115	return 1;
		1116	}
		1117	else
		1118	return 0;
		1119	}
		1120
		1121	static int
		1122	api_cede_notself (void)
		1123	{
		1124	struct transfer_args ta;
		1125
		1126	if (prepare_cede_notself (&ta))
		1127	{
		1128	TRANSFER (ta);
		1129	return 1;
		1130	}
		1131	else
		1132	return 0;
1017	}	1133	}
1018		1134
1019	MODULE = Coro::State PACKAGE = Coro::State	1135	MODULE = Coro::State PACKAGE = Coro::State
1020		1136
1021	PROTOTYPES: DISABLE	1137	PROTOTYPES: DISABLE
…		…
1027	#endif	1143	#endif
1028	BOOT_PAGESIZE;	1144	BOOT_PAGESIZE;
1029		1145
1030	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1146	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1031		1147
1032	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1148	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1033	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1149	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1034	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1150	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1151	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1152	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1035		1153
1036	main_mainstack = PL_mainstack;	1154	main_mainstack = PL_mainstack;
1037		1155
1038	coroapi.ver = CORO_API_VERSION;	1156	coroapi.ver = CORO_API_VERSION;
1039	coroapi.transfer = api_transfer;	1157	coroapi.transfer = api_transfer;
…		…
1049	HV *hv;	1167	HV *hv;
1050	int i;	1168	int i;
1051		1169
1052	Newz (0, coro, 1, struct coro);	1170	Newz (0, coro, 1, struct coro);
1053	coro->args = newAV ();	1171	coro->args = newAV ();
		1172	coro->save = CORO_SAVE_ALL;
		1173	coro->flags = CF_NEW;
1054		1174
1055	hv = newHV ();	1175	hv = newHV ();
1056	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1176	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
1057	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1177	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1058		1178
1059	for (i = 1; i < items; i++)	1179	for (i = 1; i < items; i++)
1060	av_push (coro->args, newSVsv (ST (i)));	1180	av_push (coro->args, newSVsv (ST (i)));
1061
1062	/coro->mainstack = 0; //actual work is done inside transfer /
1063	/coro->stack = 0;/
1064	}	1181	}
1065	OUTPUT:	1182	OUTPUT:
		1183	RETVAL
		1184
		1185	int
		1186	save (SV *coro, int new_save = -1)
		1187	CODE:
		1188	RETVAL = api_save (coro, new_save);
		1189	OUTPUT:
1066	RETVAL	1190	RETVAL
1067		1191
1068	void	1192	void
1069	_set_stacklevel (...)	1193	_set_stacklevel (...)
1070	ALIAS:	1194	ALIAS:
1071	Coro::State::transfer = 1	1195	Coro::State::transfer = 1
1072	Coro::schedule = 2	1196	Coro::schedule = 2
1073	Coro::cede = 3	1197	Coro::cede = 3
1074	Coro::Cont::yield = 4	1198	Coro::cede_notself = 4
1075	CODE:	1199	CODE:
1076	{	1200	{
1077	struct transfer_args ta;	1201	struct transfer_args ta;
1078		1202
1079	switch (ix)	1203	switch (ix)
1080	{	1204	{
1081	case 0:	1205	case 0:
1082	ta.prev = (struct coro )INT2PTR (coro_stack , SvIV (ST (0)));	1206	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1083	ta.next = 0;	1207	ta.next = 0;
1084	ta.flags = TRANSFER_SET_STACKLEVEL;
1085	break;	1208	break;
1086		1209
1087	case 1:	1210	case 1:
1088	if (items != 3)	1211	if (items != 2)
1089	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1212	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1090		1213
1091	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1214	prepare_transfer (&ta, ST (0), ST (1));
1092	break;	1215	break;
1093		1216
1094	case 2:	1217	case 2:
1095	prepare_schedule (&ta);	1218	prepare_schedule (&ta);
1096	break;	1219	break;
…		…
1098	case 3:	1221	case 3:
1099	prepare_cede (&ta);	1222	prepare_cede (&ta);
1100	break;	1223	break;
1101		1224
1102	case 4:	1225	case 4:
1103	{	1226	if (!prepare_cede_notself (&ta))
1104	SV *yieldstack;	1227	XSRETURN_EMPTY;
1105	SV *sv;
1106	AV *defav = GvAV (PL_defgv);
1107		1228
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	ta.prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1122	ta.next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1123	ta.flags = 0;
1124	SvREFCNT_dec (sv);
1125	}
1126	break;	1229	break;
1127
1128	}	1230	}
1129		1231
		1232	BARRIER;
1130	TRANSFER (ta);	1233	TRANSFER (ta);
1131	}
1132		1234
1133	void	1235	if (GIMME_V != G_VOID && ta.next != ta.prev)
1134	_clone_state_from (SV dst, SV src)	1236	XSRETURN_YES;
		1237	}
		1238
		1239	bool
		1240	_destroy (SV *coro_sv)
1135	CODE:	1241	CODE:
1136	{	1242	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1137	struct coro *coro_src = SvSTATE (src);	1243	OUTPUT:
1138		1244	RETVAL
1139	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1140
1141	++coro_src->refcnt;
1142	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1143	}
1144		1245
1145	void	1246	void
1146	_exit (code)	1247	_exit (code)
1147	int code	1248	int code
1148	PROTOTYPE: $	1249	PROTOTYPE: $
1149	CODE:	1250	CODE:
1150	_exit (code);	1251	_exit (code);
1151		1252
		1253	int
		1254	cctx_count ()
		1255	CODE:
		1256	RETVAL = cctx_count;
		1257	OUTPUT:
		1258	RETVAL
		1259
		1260	int
		1261	cctx_idle ()
		1262	CODE:
		1263	RETVAL = cctx_idle;
		1264	OUTPUT:
		1265	RETVAL
		1266
1152	MODULE = Coro::State PACKAGE = Coro	1267	MODULE = Coro::State PACKAGE = Coro
1153		1268
1154	BOOT:	1269	BOOT:
1155	{	1270	{
1156	int i;	1271	int i;
…		…
1162	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1277	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1163	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1278	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1164	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1279	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1165	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1280	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1166		1281
1167	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1282	coro_current = get_sv ("Coro::current", FALSE);
1168	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1283	SvREADONLY_on (coro_current);
1169		1284
1170	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1285	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1171	coro_ready[i] = newAV ();	1286	coro_ready[i] = newAV ();
1172		1287
1173	{	1288	{
1174	SV *sv = perl_get_sv("Coro::API", 1);	1289	SV *sv = perl_get_sv("Coro::API", 1);
1175		1290
1176	coroapi.schedule = api_schedule;	1291	coroapi.schedule = api_schedule;
		1292	coroapi.save = api_save;
1177	coroapi.cede = api_cede;	1293	coroapi.cede = api_cede;
		1294	coroapi.cede_notself = api_cede_notself;
1178	coroapi.ready = api_ready;	1295	coroapi.ready = api_ready;
		1296	coroapi.is_ready = api_is_ready;
1179	coroapi.nready = &coro_nready;	1297	coroapi.nready = &coro_nready;
1180	coroapi.current = coro_current;	1298	coroapi.current = coro_current;
1181		1299
1182	GCoroAPI = &coroapi;	1300	GCoroAPI = &coroapi;
1183	sv_setiv (sv, (IV)&coroapi);	1301	sv_setiv (sv, (IV)&coroapi);
1184	SvREADONLY_on (sv);	1302	SvREADONLY_on (sv);
1185	}	1303	}
1186	}	1304	}
		1305
		1306	void
		1307	_set_current (SV *current)
		1308	PROTOTYPE: $
		1309	CODE:
		1310	SvREFCNT_dec (SvRV (coro_current));
		1311	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1187		1312
1188	int	1313	int
1189	prio (Coro::State coro, int newprio = 0)	1314	prio (Coro::State coro, int newprio = 0)
1190	ALIAS:	1315	ALIAS:
1191	nice = 1	1316	nice = 1
…		…
1194	RETVAL = coro->prio;	1319	RETVAL = coro->prio;
1195		1320
1196	if (items > 1)	1321	if (items > 1)
1197	{	1322	{
1198	if (ix)	1323	if (ix)
1199	newprio += coro->prio;	1324	newprio = coro->prio - newprio;
1200		1325
1201	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1326	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1202	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1327	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1203		1328
1204	coro->prio = newprio;	1329	coro->prio = newprio;
1205	}	1330	}
1206	}	1331	}
		1332	OUTPUT:
		1333	RETVAL
1207		1334
1208	void	1335	SV *
1209	ready (SV *self)	1336	ready (SV *self)
1210	PROTOTYPE: $	1337	PROTOTYPE: $
1211	CODE:	1338	CODE:
1212	api_ready (self);	1339	RETVAL = boolSV (api_ready (self));
		1340	OUTPUT:
		1341	RETVAL
		1342
		1343	SV *
		1344	is_ready (SV *self)
		1345	PROTOTYPE: $
		1346	CODE:
		1347	RETVAL = boolSV (api_is_ready (self));
		1348	OUTPUT:
		1349	RETVAL
1213		1350
1214	int	1351	int
1215	nready (...)	1352	nready (...)
1216	PROTOTYPE:	1353	PROTOTYPE:
1217	CODE:	1354	CODE:
…		…
1223		1360
1224	SV *	1361	SV *
1225	_get_state ()	1362	_get_state ()
1226	CODE:	1363	CODE:
1227	{	1364	{
1228	struct {	1365	struct io_state *data;
1229	int errorno;
1230	int laststype;
1231	int laststatval;
1232	Stat_t statcache;
1233	} data;
1234		1366
		1367	RETVAL = newSV (sizeof (struct io_state));
		1368	data = (struct io_state *)SvPVX (RETVAL);
		1369	SvCUR_set (RETVAL, sizeof (struct io_state));
		1370	SvPOK_only (RETVAL);
		1371
1235	data.errorno = errno;	1372	data->errorno = errno;
1236	data.laststype = PL_laststype;	1373	data->laststype = PL_laststype;
1237	data.laststatval = PL_laststatval;	1374	data->laststatval = PL_laststatval;
1238	data.statcache = PL_statcache;	1375	data->statcache = PL_statcache;
1239
1240	RETVAL = newSVpvn ((char *)&data, sizeof data);
1241	}	1376	}
1242	OUTPUT:	1377	OUTPUT:
1243	RETVAL	1378	RETVAL
1244		1379
1245	void	1380	void
1246	_set_state (char *data_)	1381	_set_state (char *data_)
1247	PROTOTYPE: $	1382	PROTOTYPE: $
1248	CODE:	1383	CODE:
1249	{	1384	{
1250	struct {	1385	struct io_state data = (void )data_;
1251	int errorno;
1252	int laststype;
1253	int laststatval;
1254	Stat_t statcache;
1255	} data = (void )data_;
1256		1386
1257	errno = data->errorno;	1387	errno = data->errorno;
1258	PL_laststype = data->laststype;	1388	PL_laststype = data->laststype;
1259	PL_laststatval = data->laststatval;	1389	PL_laststatval = data->laststatval;
1260	PL_statcache = data->statcache;	1390	PL_statcache = data->statcache;
1261	}	1391	}
		1392

Diff Legend

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

Comparing Coro/Coro/State.xs (file contents): Revision 1.103 by root, Mon Nov 27 01:33:30 2006 UTC vs. Revision 1.139 by root, Sun Jan 14 21:13:41 2007 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.103 by root, Mon Nov 27 01:33:30 2006 UTC vs.
Revision 1.139 by root, Sun Jan 14 21:13:41 2007 UTC