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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.101 by root, Mon Nov 27 00:08:18 2006 UTC vs.
Revision 1.135 by root, Fri Jan 5 18:25:51 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) \
13	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))	47	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
14		48
15	#if !PERL_VERSION_ATLEAST (5,8,0)	49	#if !PERL_VERSION_ATLEAST (5,6,0)
16	# ifndef PL_ppaddr	50	# ifndef PL_ppaddr
17	# define PL_ppaddr ppaddr	51	# define PL_ppaddr ppaddr
18	# endif	52	# endif
19	# ifndef call_sv	53	# ifndef call_sv
20	# define call_sv perl_call_sv	54	# define call_sv perl_call_sv
…		…
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	struct io_state
		118	{
		119	int errorno;
		120	I32 laststype;
		121	int laststatval;
		122	Stat_t statcache;
		123	};
		124
96	static struct CoroAPI coroapi;	125	static struct CoroAPI coroapi;
97	static AV main_mainstack; / used to differentiate between $main and others */	126	static AV main_mainstack; / used to differentiate between $main and others */
98	static HV coro_state_stash, coro_stash;	127	static HV coro_state_stash, coro_stash;
99	static SV coro_mortal; / will be freed after next transfer */	128	static SV coro_mortal; / will be freed after next transfer */
100		129
		130	static struct coro_cctx *cctx_first;
		131	static int cctx_count, cctx_idle;
		132
101	/* this is a structure representing a c-level coroutine */	133	/* this is a structure representing a c-level coroutine */
102	typedef struct coro_stack {	134	typedef struct coro_cctx {
103	struct coro_stack *next;	135	struct coro_cctx *next;
104		136
105	/* the stack */	137	/* the stack */
106	void *sptr;	138	void *sptr;
107	long ssize; /* positive == mmap, otherwise malloc */	139	long ssize; /* positive == mmap, otherwise malloc */
108		140
109	/* cpu state */	141	/* cpu state */
110	void idle_sp; / sp of top-level transfer/schedule/cede call */	142	void idle_sp; / sp of top-level transfer/schedule/cede call */
		143	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
111	JMPENV *top_env;	144	JMPENV *top_env;
112	coro_context cctx;	145	coro_context cctx;
113	} coro_stack;	146
		147	int inuse;
		148
		149	#if USE_VALGRIND
		150	int valgrind_id;
		151	#endif
		152	} coro_cctx;
		153
		154	enum {
		155	CF_RUNNING = 0x0001, /* coroutine is running */
		156	CF_READY = 0x0002, /* coroutine is ready */
		157	CF_NEW = 0x0004, /* has never been switched to */
		158	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		159	};
114		160
115	/* this is a structure representing a perl-level coroutine */	161	/* this is a structure representing a perl-level coroutine */
116	struct coro {	162	struct coro {
117	/* the c coroutine allocated to this perl coroutine, if any */	163	/* the c coroutine allocated to this perl coroutine, if any */
118	coro_stack *stack;	164	coro_cctx *cctx;
119		165
120	/* data associated with this coroutine (initial args) */	166	/* data associated with this coroutine (initial args) */
121	AV *args;	167	AV *args;
122	int refcnt;	168	int refcnt;
		169	int save; /* CORO_SAVE flags */
		170	int flags; /* CF_ flags */
123		171
124	/* optionally saved, might be zero */	172	/* optionally saved, might be zero */
125	AV *defav;	173	AV defav; / @_ */
126	SV *defsv;	174	SV defsv; / $_ */
127	SV *errsv;	175	SV errsv; / $@ */
		176	SV irssv; / $/ */
		177	SV irssv_sv; / real $/ cache */
128		178
129	/* saved global state not related to stacks */	179	#define VAR(name,type) type name;
130	U8 dowarn;	180	# include "state.h"
131	I32 in_eval;	181	#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		182
163	/* coro process data */	183	/* coro process data */
164	int prio;	184	int prio;
165	};	185	};
166		186
…		…
230		250
231	#define PERL_MAGIC_coro PERL_MAGIC_ext	251	#define PERL_MAGIC_coro PERL_MAGIC_ext
232		252
233	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	253	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
234		254
		255	#define CORO_MAGIC(cv) \
		256	SvMAGIC (cv) \
		257	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		258	? SvMAGIC (cv) \
		259	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		260	: 0
		261
235	/* the next two functions merely cache the padlists */	262	/* the next two functions merely cache the padlists */
236	static void	263	static void
237	get_padlist (CV *cv)	264	get_padlist (CV *cv)
238	{	265	{
239	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	266	MAGIC *mg = CORO_MAGIC (cv);
		267	AV *av;
240		268
241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	269	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	270	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	271	else
244	{	272	{
245	#if 0	273	#if PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	274	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	275	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	276	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	277	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	278	SvREFCNT_dec (cp);
…		…
255	}	283	}
256		284
257	static void	285	static void
258	put_padlist (CV *cv)	286	put_padlist (CV *cv)
259	{	287	{
260	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	288	MAGIC *mg = CORO_MAGIC (cv);
		289	AV *av;
261		290
262	if (!mg)	291	if (!mg)
263	{	292	{
264	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	293	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	294	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266	mg->mg_virtual = &vtbl_coro;	295	mg->mg_virtual = &vtbl_coro;
267	mg->mg_obj = (SV *)newAV ();	296	mg->mg_obj = (SV *)newAV ();
268	}	297	}
269		298
270	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	299	av = (AV *)mg->mg_obj;
		300
		301	if (AvFILLp (av) >= AvMAX (av))
		302	av_extend (av, AvMAX (av) + 1);
		303
		304	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
271	}	305	}
272		306
273	#define SB do {	307	#define SB do {
274	#define SE } while (0)	308	#define SE } while (0)
275		309
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	310	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
280		311
281	static void	312	static void
282	load_state(Coro__State c)	313	load_perl (Coro__State c)
283	{	314	{
284	PL_dowarn = c->dowarn;	315	#define VAR(name,type) PL_ ## name = c->name;
285	PL_in_eval = c->in_eval;	316	# include "state.h"
286		317	#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		318
318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	319	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	320	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	321	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		322	if (c->irssv)
		323	{
		324	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
		325	SvREFCNT_dec (c->irssv);
		326	else
		327	{
		328	REPLACE_SV (PL_rs, c->irssv);
		329	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		330	sv_setsv (c->irssv_sv, PL_rs);
		331	}
		332	}
321		333
322	{	334	{
323	dSP;	335	dSP;
324	CV *cv;	336	CV *cv;
325		337
326	/* now do the ugly restore mess */	338	/* now do the ugly restore mess */
327	while ((cv = (CV *)POPs))	339	while ((cv = (CV *)POPs))
328	{	340	{
329	AV padlist = (AV )POPs;
330
331	if (padlist)
332	{
333	put_padlist (cv); /* mark this padlist as available */	341	put_padlist (cv); /* mark this padlist as available */
334	CvPADLIST(cv) = padlist;	342	CvDEPTH (cv) = PTR2IV (POPs);
335	}	343	CvPADLIST (cv) = (AV *)POPs;
336
337	++CvDEPTH(cv);
338	}	344	}
339		345
340	PUTBACK;	346	PUTBACK;
341	}	347	}
342	}	348	}
343		349
344	static void	350	static void
345	save_state(Coro__State c, int flags)	351	save_perl (Coro__State c)
346	{	352	{
347	{	353	{
348	dSP;	354	dSP;
349	I32 cxix = cxstack_ix;	355	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	356	PERL_CONTEXT *ccstk = cxstack;
…		…
353	/*	359	/*
354	* the worst thing you can imagine happens first - we have to save	360	* the worst thing you can imagine happens first - we have to save
355	* (and reinitialize) all cv's in the whole callchain :(	361	* (and reinitialize) all cv's in the whole callchain :(
356	*/	362	*/
357		363
		364	EXTEND (SP, 3 + 1);
358	PUSHs (Nullsv);	365	PUSHs (Nullsv);
359	/* this loop was inspired by pp_caller */	366	/* this loop was inspired by pp_caller */
360	for (;;)	367	for (;;)
361	{	368	{
362	while (cxix >= 0)	369	while (cxix >= 0)
363	{	370	{
364	PERL_CONTEXT *cx = &ccstk[cxix--];	371	PERL_CONTEXT *cx = &ccstk[cxix--];
365		372
366	if (CxTYPE(cx) == CXt_SUB)	373	if (CxTYPE (cx) == CXt_SUB)
367	{	374	{
368	CV *cv = cx->blk_sub.cv;	375	CV *cv = cx->blk_sub.cv;
		376
369	if (CvDEPTH(cv))	377	if (CvDEPTH (cv))
370	{	378	{
371	EXTEND (SP, CvDEPTH(cv)*2);	379	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));	380	PUSHs ((SV *)CvPADLIST (cv));
		381	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
381	PUSHs ((SV *)cv);	382	PUSHs ((SV *)cv);
382		383
		384	CvDEPTH (cv) = 0;
383	get_padlist (cv);	385	get_padlist (cv);
384	}	386	}
385	}	387	}
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	}	388	}
395		389
396	if (top_si->si_type == PERLSI_MAIN)	390	if (top_si->si_type == PERLSI_MAIN)
397	break;	391	break;
398		392
…		…
402	}	396	}
403		397
404	PUTBACK;	398	PUTBACK;
405	}	399	}
406		400
407	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	401	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;	402	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
409	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	403	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		404	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
410		405
411	c->dowarn = PL_dowarn;	406	#define VAR(name,type)c->name = PL_ ## name;
412	c->in_eval = PL_in_eval;	407	# include "state.h"
413		408	#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	}	409	}
445		410
446	/*	411	/*
447	* allocate various perl stacks. This is an exact copy	412	* allocate various perl stacks. This is an exact copy
448	* of perl.c:init_stacks, except that it uses less memory	413	* of perl.c:init_stacks, except that it uses less memory
449	* on the (sometimes correct) assumption that coroutines do	414	* on the (sometimes correct) assumption that coroutines do
450	* not usually need a lot of stackspace.	415	* not usually need a lot of stackspace.
451	*/	416	*/
		417	#if PREFER_PERL_FUNCTIONS
		418	# define coro_init_stacks init_stacks
		419	#else
452	static void	420	static void
453	coro_init_stacks ()	421	coro_init_stacks ()
454	{	422	{
455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	423	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
456	PL_curstackinfo->si_type = PERLSI_MAIN;	424	PL_curstackinfo->si_type = PERLSI_MAIN;
457	PL_curstack = PL_curstackinfo->si_stack;	425	PL_curstack = PL_curstackinfo->si_stack;
458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	426	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459		427
460	PL_stack_base = AvARRAY(PL_curstack);	428	PL_stack_base = AvARRAY(PL_curstack);
461	PL_stack_sp = PL_stack_base;	429	PL_stack_sp = PL_stack_base;
462	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	430	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463		431
464	New(50,PL_tmps_stack,96,SV*);	432	New(50,PL_tmps_stack,128,SV*);
465	PL_tmps_floor = -1;	433	PL_tmps_floor = -1;
466	PL_tmps_ix = -1;	434	PL_tmps_ix = -1;
467	PL_tmps_max = 96;	435	PL_tmps_max = 128;
468		436
469	New(54,PL_markstack,16,I32);	437	New(54,PL_markstack,32,I32);
470	PL_markstack_ptr = PL_markstack;	438	PL_markstack_ptr = PL_markstack;
471	PL_markstack_max = PL_markstack + 16;	439	PL_markstack_max = PL_markstack + 32;
472		440
473	#ifdef SET_MARK_OFFSET	441	#ifdef SET_MARK_OFFSET
474	SET_MARK_OFFSET;	442	SET_MARK_OFFSET;
475	#endif	443	#endif
476		444
477	New(54,PL_scopestack,16,I32);	445	New(54,PL_scopestack,32,I32);
478	PL_scopestack_ix = 0;	446	PL_scopestack_ix = 0;
479	PL_scopestack_max = 16;	447	PL_scopestack_max = 32;
480		448
481	New(54,PL_savestack,96,ANY);	449	New(54,PL_savestack,64,ANY);
482	PL_savestack_ix = 0;	450	PL_savestack_ix = 0;
483	PL_savestack_max = 96;	451	PL_savestack_max = 64;
484		452
485	#if !PERL_VERSION_ATLEAST (5,9,0)	453	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	454	New(54,PL_retstack,16,OP*);
487	PL_retstack_ix = 0;	455	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	456	PL_retstack_max = 16;
489	#endif	457	#endif
490	}	458	}
		459	#endif
491		460
492	/*	461	/*
493	* destroy the stacks, the callchain etc...	462	* destroy the stacks, the callchain etc...
494	*/	463	*/
495	static void	464	static void
496	destroy_stacks()	465	coro_destroy_stacks ()
497	{	466	{
498	if (!IN_DESTRUCT)	467	if (!IN_DESTRUCT)
499	{	468	{
500	/* is this ugly, I ask? */	469	/* restore all saved variables and stuff */
501	LEAVE_SCOPE (0);	470	LEAVE_SCOPE (0);
		471	assert (PL_tmps_floor == -1);
502		472
503	/* sure it is, but more important: is it correct?? :/ */	473	/* free all temporaries */
504	FREETMPS;	474	FREETMPS;
		475	assert (PL_tmps_ix == -1);
505		476
		477	/* unwind all extra stacks */
506	/POPSTACK_TO (PL_mainstack);//D//use/	478	POPSTACK_TO (PL_mainstack);
		479
		480	/* unwind main stack */
		481	dounwind (-1);
507	}	482	}
508		483
509	while (PL_curstackinfo->si_next)	484	while (PL_curstackinfo->si_next)
510	PL_curstackinfo = PL_curstackinfo->si_next;	485	PL_curstackinfo = PL_curstackinfo->si_next;
511		486
512	while (PL_curstackinfo)	487	while (PL_curstackinfo)
513	{	488	{
514	PERL_SI *p = PL_curstackinfo->si_prev;	489	PERL_SI *p = PL_curstackinfo->si_prev;
515		490
516	{ /D//remove/
517	dSP;
518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519	PUTBACK; /* possibly superfluous */
520	}
521
522	if (!IN_DESTRUCT)	491	if (!IN_DESTRUCT)
523	{
524	dounwind (-1);/D//remove/
525	SvREFCNT_dec (PL_curstackinfo->si_stack);	492	SvREFCNT_dec (PL_curstackinfo->si_stack);
526	}
527		493
528	Safefree (PL_curstackinfo->si_cxstack);	494	Safefree (PL_curstackinfo->si_cxstack);
529	Safefree (PL_curstackinfo);	495	Safefree (PL_curstackinfo);
530	PL_curstackinfo = p;	496	PL_curstackinfo = p;
531	}	497	}
…		…
543	setup_coro (struct coro *coro)	509	setup_coro (struct coro *coro)
544	{	510	{
545	/*	511	/*
546	* emulate part of the perl startup here.	512	* emulate part of the perl startup here.
547	*/	513	*/
548	dTHX;	514
		515	coro_init_stacks ();
		516
		517	PL_curcop = &PL_compiling;
		518	PL_in_eval = EVAL_NULL;
		519	PL_curpm = 0;
		520	PL_localizing = 0;
		521	PL_dirty = 0;
		522	PL_restartop = 0;
		523
		524	{
		525	dSP;
		526	LOGOP myop;
		527
		528	SvREFCNT_dec (GvAV (PL_defgv));
		529	GvAV (PL_defgv) = coro->args; coro->args = 0;
		530
		531	Zero (&myop, 1, LOGOP);
		532	myop.op_next = Nullop;
		533	myop.op_flags = OPf_WANT_VOID;
		534
		535	PUSHMARK (SP);
		536	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		537	PUTBACK;
		538	PL_op = (OP *)&myop;
		539	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		540	SPAGAIN;
		541	}
		542
		543	ENTER; /* necessary e.g. for dounwind */
		544	}
		545
		546	static void
		547	free_coro_mortal ()
		548	{
		549	if (coro_mortal)
		550	{
		551	SvREFCNT_dec (coro_mortal);
		552	coro_mortal = 0;
		553	}
		554	}
		555
		556	/* inject a fake call to Coro::State::_cctx_init into the execution */
		557	static void NOINLINE
		558	prepare_cctx (coro_cctx *cctx)
		559	{
549	dSP;	560	dSP;
550	UNOP myop;	561	LOGOP myop;
551	SV sub_init = (SV )get_cv ("Coro::State::coro_init", FALSE);
552		562
553	coro_init_stacks ();
554	/PL_curcop = 0;/
555	/PL_in_eval = PL_in_eval;/ /* inherit */
556	SvREFCNT_dec (GvAV (PL_defgv));
557	GvAV (PL_defgv) = coro->args; coro->args = 0;
558
559	SPAGAIN;
560
561	Zero (&myop, 1, UNOP);	563	Zero (&myop, 1, LOGOP);
562	myop.op_next = Nullop;	564	myop.op_next = PL_op;
563	myop.op_flags = OPf_WANT_VOID;	565	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
564		566
		567	PUSHMARK (SP);
		568	EXTEND (SP, 2);
		569	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		570	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		571	PUTBACK;
565	PL_op = (OP *)&myop;	572	PL_op = (OP *)&myop;
566
567	PUSHMARK(SP);
568	XPUSHs (sub_init);
569	PUTBACK;
570	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	573	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
571	SPAGAIN;	574	SPAGAIN;
572
573	ENTER; /* necessary e.g. for dounwind */
574	}
575
576	static void
577	free_coro_mortal ()
578	{
579	if (coro_mortal)
580	{
581	SvREFCNT_dec (coro_mortal);
582	coro_mortal = 0;
583	}
584	}
585
586	static void NOINLINE
587	prepare_cctx (coro_stack *cctx)
588	{
589	dSP;
590	UNOP myop;
591
592	Zero (&myop, 1, UNOP);
593	myop.op_next = PL_op;
594	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
595
596	PUSHMARK(SP);
597	EXTEND (SP, 2);
598	PUSHs (newSViv (PTR2IV (cctx)));
599	PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
600	PUTBACK;
601	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
602	SPAGAIN;
603	}	575	}
604		576
605	static void	577	static void
606	coro_run (void *arg)	578	coro_run (void *arg)
607	{	579	{
		580	/* coro_run is the alternative tail of transfer(), so unlock here. */
		581	UNLOCK;
		582
608	/*	583	/*
609	* this is a _very_ stripped down perl interpreter ;)	584	* this is a _very_ stripped down perl interpreter ;)
610	*/	585	*/
611	UNLOCK;
612
613	PL_top_env = &PL_start_env;	586	PL_top_env = &PL_start_env;
		587
		588	/* inject call to cctx_init */
614	prepare_cctx ((coro_stack *)arg);	589	prepare_cctx ((coro_cctx *)arg);
615		590
616	/* somebody will hit me for both perl_run and PL_restartop */	591	/* somebody will hit me for both perl_run and PL_restartop */
617	perl_run (PERL_GET_CONTEXT);	592	PL_restartop = PL_op;
		593	perl_run (PL_curinterp);
618		594
619	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);	595	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
620	abort ();	596	abort ();
621	}	597	}
622		598
623	static coro_stack *	599	static coro_cctx *
624	stack_new ()	600	cctx_new ()
625	{	601	{
626	coro_stack *stack;	602	coro_cctx *cctx;
627		603
		604	++cctx_count;
		605
628	New (0, stack, 1, coro_stack);	606	Newz (0, cctx, 1, coro_cctx);
629		607
630	#if HAVE_MMAP	608	#if HAVE_MMAP
631		609
632	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	610	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
633	/* mmap suppsedly does allocate-on-write for us */	611	/* mmap supposedly does allocate-on-write for us */
634	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	612	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
635		613
636	if (stack->sptr == (void *)-1)	614	if (cctx->sptr == (void *)-1)
637	{	615	{
638	perror ("FATAL: unable to mmap stack for coroutine");	616	perror ("FATAL: unable to mmap stack for coroutine");
639	_exit (EXIT_FAILURE);	617	_exit (EXIT_FAILURE);
640	}	618	}
641		619
642	# if STACKGUARD	620	# if STACKGUARD
643	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	621	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
644	# endif	622	# endif
645		623
646	#else	624	#else
647		625
648	stack->ssize = STACKSIZE * (long)sizeof (long);	626	cctx->ssize = STACKSIZE * (long)sizeof (long);
649	New (0, stack->sptr, STACKSIZE, long);	627	New (0, cctx->sptr, STACKSIZE, long);
650		628
651	if (!stack->sptr)	629	if (!cctx->sptr)
652	{	630	{
653	perror (stderr, "FATAL: unable to malloc stack for coroutine");	631	perror ("FATAL: unable to malloc stack for coroutine");
654	_exit (EXIT_FAILURE);	632	_exit (EXIT_FAILURE);
655	}	633	}
656		634
657	#endif	635	#endif
658		636
		637	#if USE_VALGRIND
		638	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		639	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		640	cctx->ssize + (char *)cctx->sptr
		641	);
		642	#endif
		643
659	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	644	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
660		645
661	return stack;	646	return cctx;
662	}	647	}
663		648
664	static void	649	static void
665	stack_free (coro_stack *stack)	650	cctx_destroy (coro_cctx *cctx)
666	{	651	{
667	if (!stack)	652	if (!cctx)
668	return;	653	return;
669		654
		655	--cctx_count;
		656
		657	#if USE_VALGRIND
		658	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		659	#endif
		660
670	#if HAVE_MMAP	661	#if HAVE_MMAP
671	munmap (stack->sptr, stack->ssize);	662	munmap (cctx->sptr, cctx->ssize);
672	#else	663	#else
673	Safefree (stack->sptr);	664	Safefree (cctx->sptr);
674	#endif	665	#endif
675		666
676	Safefree (stack);	667	Safefree (cctx);
677	}	668	}
678		669
679	static coro_stack *stack_first;
680
681	static coro_stack *	670	static coro_cctx *
682	stack_get ()	671	cctx_get ()
683	{	672	{
684	coro_stack *stack;	673	coro_cctx *cctx;
685		674
686	if (stack_first)	675	if (cctx_first)
687	{	676	{
688	stack = stack_first;	677	cctx = cctx_first;
689	stack_first = stack->next;	678	cctx_first = cctx->next;
		679	--cctx_idle;
690	}	680	}
691	else	681	else
692	{	682	{
693	stack = stack_new ();	683	cctx = cctx_new ();
694	PL_op = PL_op->op_next;	684	PL_op = PL_op->op_next;
695	}	685	}
696		686
697	return stack;	687	return cctx;
698	}	688	}
699		689
700	static void	690	static void
701	stack_put (coro_stack *stack)	691	cctx_put (coro_cctx *cctx)
702	{	692	{
703	stack->next = stack_first;	693	/* free another cctx if overlimit */
704	stack_first = stack;	694	if (cctx_idle >= MAX_IDLE_CCTX)
		695	{
		696	coro_cctx *first = cctx_first;
		697	cctx_first = first->next;
		698	--cctx_idle;
		699
		700	assert (!first->inuse);
		701	cctx_destroy (first);
		702	}
		703
		704	++cctx_idle;
		705	cctx->next = cctx_first;
		706	cctx_first = cctx;
705	}	707	}
706		708
707	/* never call directly, always through the coro_state_transfer global variable */	709	/* never call directly, always through the coro_state_transfer global variable */
708	static void NOINLINE	710	static void NOINLINE
709	transfer (struct coro prev, struct coro next, int flags)	711	transfer (struct coro prev, struct coro next)
710	{	712	{
711	dSTACKLEVEL;	713	dSTACKLEVEL;
712		714
713	/* sometimes transfer is only called to set idle_sp */	715	/* sometimes transfer is only called to set idle_sp */
714	if (flags == TRANSFER_SET_STACKLEVEL)	716	if (!next)
		717	{
715	((coro_stack *)prev)->idle_sp = STACKLEVEL;	718	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		719	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		720	}
716	else if (prev != next)	721	else if (prev != next)
717	{	722	{
718	coro_stack *prev__stack;	723	coro_cctx *prev__cctx;
		724
		725	if (prev->flags & CF_NEW)
		726	{
		727	/* create a new empty context */
		728	Newz (0, prev->cctx, 1, coro_cctx);
		729	prev->cctx->inuse = 1;
		730	prev->flags &= ~CF_NEW;
		731	prev->flags \|= CF_RUNNING;
		732	}
		733
		734	/TODO: must not croak here /
		735	if (!prev->flags & CF_RUNNING)
		736	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		737
		738	if (next->flags & CF_RUNNING)
		739	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		740
		741	if (next->flags & CF_DESTROYED)
		742	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		743
		744	prev->flags &= ~CF_RUNNING;
		745	next->flags \|= CF_RUNNING;
719		746
720	LOCK;	747	LOCK;
721		748
722	if (next->mainstack)	749	if (next->flags & CF_NEW)
723	{	750	{
724	/* coroutine already started */	751	/* need to start coroutine */
725	SAVE (prev, flags);	752	next->flags &= ~CF_NEW;
726	LOAD (next);	753	/* first get rid of the old state */
		754	save_perl (prev);
		755	/* setup coroutine call */
		756	setup_coro (next);
		757	/* need a new stack */
		758	assert (!next->cctx);
727	}	759	}
728	else	760	else
729	{	761	{
730	/* need to start coroutine */	762	/* coroutine already started */
731	/* first get rid of the old state */	763	save_perl (prev);
732	SAVE (prev, -1);	764	load_perl (next);
733	/* setup coroutine call */
734	setup_coro (next);
735	/* need a stack */
736	next->stack = 0;
737	}	765	}
738		766
739	if (!prev->stack)
740	/* create a new empty context */
741	Newz (0, prev->stack, 1, coro_stack);
742
743	prev__stack = prev->stack;	767	prev__cctx = prev->cctx;
744		768
745	/* possibly "free" the stack */	769	/* possibly "free" the cctx */
746	if (prev__stack->idle_sp == STACKLEVEL)	770	if (prev__cctx->idle_sp == STACKLEVEL)
747	{	771	{
748	stack_put (prev__stack);	772	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		773	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		774
749	prev->stack = 0;	775	prev->cctx = 0;
		776
		777	cctx_put (prev__cctx);
		778	prev__cctx->inuse = 0;
750	}	779	}
751		780
752	if (!next->stack)	781	if (!next->cctx)
753	next->stack = stack_get ();
754
755	if (prev__stack != next->stack)
756	{	782	{
757	prev__stack->top_env = PL_top_env;	783	next->cctx = cctx_get ();
758	PL_top_env = next->stack->top_env;	784	assert (!next->cctx->inuse);
759	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	785	next->cctx->inuse = 1;
760	}	786	}
761		787
		788	if (prev__cctx != next->cctx)
		789	{
		790	prev__cctx->top_env = PL_top_env;
		791	PL_top_env = next->cctx->top_env;
		792	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		793	}
		794
762	free_coro_mortal ();	795	free_coro_mortal ();
763
764	UNLOCK;	796	UNLOCK;
765	}	797	}
766	}	798	}
767		799
768	struct transfer_args	800	struct transfer_args
769	{	801	{
770	struct coro prev, next;	802	struct coro prev, next;
771	int flags;
772	};	803	};
773		804
774	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	805	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
775		806
776	static void	807	static int
777	coro_state_destroy (struct coro *coro)	808	coro_state_destroy (struct coro *coro)
778	{	809	{
779	if (coro->refcnt--)	810	if (coro->flags & CF_DESTROYED)
780	return;	811	return 0;
		812
		813	coro->flags \|= CF_DESTROYED;
781		814
782	if (coro->mainstack && coro->mainstack != main_mainstack)	815	if (coro->mainstack && coro->mainstack != main_mainstack)
783	{	816	{
		817	assert (!(coro->flags & CF_RUNNING));
		818
784	struct coro temp;	819	struct coro temp;
		820	Zero (&temp, 1, struct coro);
		821	temp.save = CORO_SAVE_ALL;
785		822
786	SAVE ((&temp), TRANSFER_SAVE_ALL);	823	if (coro->flags & CF_RUNNING)
787	LOAD (coro);	824	croak ("FATAL: tried to destroy currently running coroutine");
788		825
		826	save_perl (&temp);
		827	load_perl (coro);
		828
789	destroy_stacks ();	829	coro_destroy_stacks ();
790		830
791	LOAD ((&temp)); /* this will get rid of defsv etc.. */	831	load_perl (&temp); /* this will get rid of defsv etc.. */
792		832
793	coro->mainstack = 0;	833	coro->mainstack = 0;
794	}	834	}
795		835
796	stack_free (coro->stack);	836	cctx_destroy (coro->cctx);
797	SvREFCNT_dec (coro->args);	837	SvREFCNT_dec (coro->args);
798	Safefree (coro);	838
		839	return 1;
799	}	840	}
800		841
801	static int	842	static int
802	coro_state_clear (pTHX_ SV sv, MAGIC mg)	843	coro_state_free (pTHX_ SV sv, MAGIC mg)
803	{	844	{
804	struct coro coro = (struct coro )mg->mg_ptr;	845	struct coro coro = (struct coro )mg->mg_ptr;
805	mg->mg_ptr = 0;	846	mg->mg_ptr = 0;
806		847
		848	if (--coro->refcnt < 0)
		849	{
807	coro_state_destroy (coro);	850	coro_state_destroy (coro);
		851	Safefree (coro);
		852	}
808		853
809	return 0;	854	return 0;
810	}	855	}
811		856
812	static int	857	static int
…		…
819	return 0;	864	return 0;
820	}	865	}
821		866
822	static MGVTBL coro_state_vtbl = {	867	static MGVTBL coro_state_vtbl = {
823	0, 0, 0, 0,	868	0, 0, 0, 0,
824	coro_state_clear,	869	coro_state_free,
825	0,	870	0,
826	#ifdef MGf_DUP	871	#ifdef MGf_DUP
827	coro_state_dup,	872	coro_state_dup,
		873	#else
		874	# define MGf_DUP 0
828	#endif	875	#endif
829	};	876	};
830		877
831	static struct coro *	878	static struct coro *
832	SvSTATE (SV *coro)	879	SvSTATE (SV *coro)
…		…
849	assert (mg->mg_type == PERL_MAGIC_ext);	896	assert (mg->mg_type == PERL_MAGIC_ext);
850	return (struct coro *)mg->mg_ptr;	897	return (struct coro *)mg->mg_ptr;
851	}	898	}
852		899
853	static void	900	static void
854	prepare_transfer (struct transfer_args ta, SV prev, SV *next, int flags)	901	prepare_transfer (struct transfer_args ta, SV prev_sv, SV *next_sv)
855	{	902	{
856	ta->prev = SvSTATE (prev);	903	ta->prev = SvSTATE (prev_sv);
857	ta->next = SvSTATE (next);	904	ta->next = SvSTATE (next_sv);
858	ta->flags = flags;
859	}	905	}
860		906
861	static void	907	static void
862	api_transfer (SV prev, SV next, int flags)	908	api_transfer (SV prev_sv, SV next_sv)
863	{	909	{
864	dTHX;
865	struct transfer_args ta;	910	struct transfer_args ta;
866		911
867	prepare_transfer (&ta, prev, next, flags);	912	prepare_transfer (&ta, prev_sv, next_sv);
868	TRANSFER (ta);	913	TRANSFER (ta);
		914	}
		915
		916	static int
		917	api_save (SV *coro_sv, int new_save)
		918	{
		919	struct coro *coro = SvSTATE (coro_sv);
		920	int old_save = coro->save;
		921
		922	if (new_save >= 0)
		923	coro->save = new_save;
		924
		925	return old_save;
869	}	926	}
870		927
871	/ Coro ******************************************************************/	928	/ Coro ******************************************************************/
872		929
873	#define PRIO_MAX 3	930	#define PRIO_MAX 3
…		…
876	#define PRIO_LOW -1	933	#define PRIO_LOW -1
877	#define PRIO_IDLE -3	934	#define PRIO_IDLE -3
878	#define PRIO_MIN -4	935	#define PRIO_MIN -4
879		936
880	/* for Coro.pm */	937	/* for Coro.pm */
881	static GV coro_current, coro_idle;	938	static SV *coro_current;
882	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	939	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883	static int coro_nready;	940	static int coro_nready;
884		941
885	static void	942	static void
886	coro_enq (SV *sv)	943	coro_enq (SV *coro_sv)
887	{	944	{
888	int prio;
889
890	if (SvTYPE (sv) != SVt_PVHV)
891	croak ("Coro::ready tried to enqueue something that is not a coroutine");
892
893	prio = SvSTATE (sv)->prio;
894
895	av_push (coro_ready [prio - PRIO_MIN], sv);	945	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
896	coro_nready++;	946	coro_nready++;
897	}	947	}
898		948
899	static SV *	949	static SV *
900	coro_deq (int min_prio)	950	coro_deq (int min_prio)
…		…
913	}	963	}
914		964
915	return 0;	965	return 0;
916	}	966	}
917		967
918	static void	968	static int
919	api_ready (SV *coro)	969	api_ready (SV *coro_sv)
920	{	970	{
921	dTHX;	971	struct coro *coro;
922		972
923	if (SvROK (coro))	973	if (SvROK (coro_sv))
924	coro = SvRV (coro);	974	coro_sv = SvRV (coro_sv);
		975
		976	coro = SvSTATE (coro_sv);
		977
		978	if (coro->flags & CF_READY)
		979	return 0;
		980
		981	coro->flags \|= CF_READY;
925		982
926	LOCK;	983	LOCK;
927	coro_enq (SvREFCNT_inc (coro));	984	coro_enq (SvREFCNT_inc (coro_sv));
928	UNLOCK;	985	UNLOCK;
		986
		987	return 1;
		988	}
		989
		990	static int
		991	api_is_ready (SV *coro_sv)
		992	{
		993	return !!(SvSTATE (coro_sv)->flags & CF_READY);
929	}	994	}
930		995
931	static void	996	static void
932	prepare_schedule (struct transfer_args *ta)	997	prepare_schedule (struct transfer_args *ta)
933	{	998	{
934	SV current, prev, *next;	999	SV prev_sv, next_sv;
935
936	current = GvSV (coro_current);
937		1000
938	for (;;)	1001	for (;;)
939	{	1002	{
940	LOCK;	1003	LOCK;
941	next = coro_deq (PRIO_MIN);	1004	next_sv = coro_deq (PRIO_MIN);
942	UNLOCK;	1005	UNLOCK;
943		1006
		1007	/* nothing to schedule: call the idle handler */
944	if (next)	1008	if (!next_sv)
945	break;
946
947	{	1009	{
948	dSP;	1010	dSP;
949		1011
950	ENTER;	1012	ENTER;
951	SAVETMPS;	1013	SAVETMPS;
952		1014
953	PUSHMARK (SP);	1015	PUSHMARK (SP);
954	PUTBACK;	1016	PUTBACK;
955	call_sv (GvSV (coro_idle), G_DISCARD);	1017	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
956		1018
957	FREETMPS;	1019	FREETMPS;
958	LEAVE;	1020	LEAVE;
		1021	continue;
959	}	1022	}
960	}
961		1023
962	prev = SvRV (current);	1024	ta->next = SvSTATE (next_sv);
963	SvRV (current) = next;	1025
		1026	/* cannot transfer to destroyed coros, skip and look for next */
		1027	if (ta->next->flags & CF_DESTROYED)
		1028	{
		1029	SvREFCNT_dec (next_sv);
		1030	continue;
		1031	}
		1032
		1033	break;
		1034	}
964		1035
965	/* free this only after the transfer */	1036	/* free this only after the transfer */
		1037	prev_sv = SvRV (coro_current);
		1038	SvRV_set (coro_current, next_sv);
		1039	ta->prev = SvSTATE (prev_sv);
		1040
		1041	assert (ta->next->flags & CF_READY);
		1042	ta->next->flags &= ~CF_READY;
		1043
966	LOCK;	1044	LOCK;
967	free_coro_mortal ();	1045	free_coro_mortal ();
		1046	coro_mortal = prev_sv;
968	UNLOCK;	1047	UNLOCK;
969	coro_mortal = prev;
970
971	ta->prev = SvSTATE (prev);
972	ta->next = SvSTATE (next);
973	ta->flags = TRANSFER_SAVE_ALL;
974	}	1048	}
975		1049
976	static void	1050	static void
977	prepare_cede (struct transfer_args *ta)	1051	prepare_cede (struct transfer_args *ta)
978	{	1052	{
979	LOCK;	1053	api_ready (coro_current);
980	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
981	UNLOCK;
982
983	prepare_schedule (ta);	1054	prepare_schedule (ta);
984	}	1055	}
985		1056
		1057	static int
		1058	prepare_cede_notself (struct transfer_args *ta)
		1059	{
		1060	if (coro_nready)
		1061	{
		1062	SV *prev = SvRV (coro_current);
		1063	prepare_schedule (ta);
		1064	api_ready (prev);
		1065	return 1;
		1066	}
		1067	else
		1068	return 0;
		1069	}
		1070
986	static void	1071	static void
987	api_schedule (void)	1072	api_schedule (void)
988	{	1073	{
989	dTHX;
990	struct transfer_args ta;	1074	struct transfer_args ta;
991		1075
992	prepare_schedule (&ta);	1076	prepare_schedule (&ta);
993	TRANSFER (ta);	1077	TRANSFER (ta);
994	}	1078	}
995		1079
996	static void	1080	static int
997	api_cede (void)	1081	api_cede (void)
998	{	1082	{
999	dTHX;
1000	struct transfer_args ta;	1083	struct transfer_args ta;
1001		1084
1002	prepare_cede (&ta);	1085	prepare_cede (&ta);
		1086
		1087	if (ta.prev != ta.next)
		1088	{
1003	TRANSFER (ta);	1089	TRANSFER (ta);
		1090	return 1;
		1091	}
		1092	else
		1093	return 0;
		1094	}
		1095
		1096	static int
		1097	api_cede_notself (void)
		1098	{
		1099	struct transfer_args ta;
		1100
		1101	if (prepare_cede_notself (&ta))
		1102	{
		1103	TRANSFER (ta);
		1104	return 1;
		1105	}
		1106	else
		1107	return 0;
1004	}	1108	}
1005		1109
1006	MODULE = Coro::State PACKAGE = Coro::State	1110	MODULE = Coro::State PACKAGE = Coro::State
1007		1111
1008	PROTOTYPES: DISABLE	1112	PROTOTYPES: DISABLE
…		…
1014	#endif	1118	#endif
1015	BOOT_PAGESIZE;	1119	BOOT_PAGESIZE;
1016		1120
1017	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1121	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1018		1122
1019	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1123	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1020	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1124	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1021	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1125	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1126	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1127	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1022		1128
1023	main_mainstack = PL_mainstack;	1129	main_mainstack = PL_mainstack;
1024		1130
1025	coroapi.ver = CORO_API_VERSION;	1131	coroapi.ver = CORO_API_VERSION;
1026	coroapi.transfer = api_transfer;	1132	coroapi.transfer = api_transfer;
…		…
1036	HV *hv;	1142	HV *hv;
1037	int i;	1143	int i;
1038		1144
1039	Newz (0, coro, 1, struct coro);	1145	Newz (0, coro, 1, struct coro);
1040	coro->args = newAV ();	1146	coro->args = newAV ();
		1147	coro->save = CORO_SAVE_ALL;
		1148	coro->flags = CF_NEW;
1041		1149
1042	hv = newHV ();	1150	hv = newHV ();
1043	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1151	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
1044	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1152	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1045		1153
1046	for (i = 1; i < items; i++)	1154	for (i = 1; i < items; i++)
1047	av_push (coro->args, newSVsv (ST (i)));	1155	av_push (coro->args, newSVsv (ST (i)));
1048
1049	/coro->mainstack = 0; //actual work is done inside transfer /
1050	/coro->stack = 0;/
1051	}	1156	}
1052	OUTPUT:	1157	OUTPUT:
		1158	RETVAL
		1159
		1160	int
		1161	save (SV *coro, int new_save = -1)
		1162	CODE:
		1163	RETVAL = api_save (coro, new_save);
		1164	OUTPUT:
1053	RETVAL	1165	RETVAL
1054		1166
1055	void	1167	void
1056	_set_stacklevel (...)	1168	_set_stacklevel (...)
1057	ALIAS:	1169	ALIAS:
1058	Coro::State::transfer = 1	1170	Coro::State::transfer = 1
1059	Coro::schedule = 2	1171	Coro::schedule = 2
1060	Coro::cede = 3	1172	Coro::cede = 3
1061	Coro::Cont::yield = 4	1173	Coro::cede_notself = 4
1062	CODE:	1174	CODE:
1063	{	1175	{
1064	struct transfer_args ta;	1176	struct transfer_args ta;
1065		1177
1066	switch (ix)	1178	switch (ix)
1067	{	1179	{
1068	case 0:	1180	case 0:
1069	ta.prev = (struct coro )INT2PTR (coro_stack , SvIV (ST (0)));	1181	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1070	ta.next = 0;	1182	ta.next = 0;
1071	ta.flags = TRANSFER_SET_STACKLEVEL;
1072	break;	1183	break;
1073		1184
1074	case 1:	1185	case 1:
1075	if (items != 3)	1186	if (items != 2)
1076	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1187	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1077		1188
1078	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1189	prepare_transfer (&ta, ST (0), ST (1));
1079	break;	1190	break;
1080		1191
1081	case 2:	1192	case 2:
1082	prepare_schedule (&ta);	1193	prepare_schedule (&ta);
1083	break;	1194	break;
…		…
1085	case 3:	1196	case 3:
1086	prepare_cede (&ta);	1197	prepare_cede (&ta);
1087	break;	1198	break;
1088		1199
1089	case 4:	1200	case 4:
1090	{	1201	if (!prepare_cede_notself (&ta))
1091	SV *yieldstack;	1202	XSRETURN_EMPTY;
1092	SV *sv;
1093	AV *defav = GvAV (PL_defgv);
1094		1203
1095	yieldstack = *hv_fetch (
1096	(HV *)SvRV (GvSV (coro_current)),
1097	"yieldstack", sizeof ("yieldstack") - 1,
1098	0
1099	);
1100
1101	/* set up @_ -- ugly */
1102	av_clear (defav);
1103	av_fill (defav, items - 1);
1104	while (items--)
1105	av_store (defav, items, SvREFCNT_inc (ST(items)));
1106
1107	sv = av_pop ((AV *)SvRV (yieldstack));
1108	ta.prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1109	ta.next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1110	ta.flags = 0;
1111	SvREFCNT_dec (sv);
1112	}
1113	break;	1204	break;
1114
1115	}	1205	}
1116		1206
		1207	BARRIER;
1117	TRANSFER (ta);	1208	TRANSFER (ta);
1118	}
1119		1209
1120	void	1210	if (GIMME_V != G_VOID && ta.next != ta.prev)
1121	_clone_state_from (SV dst, SV src)	1211	XSRETURN_YES;
		1212	}
		1213
		1214	bool
		1215	_destroy (SV *coro_sv)
1122	CODE:	1216	CODE:
1123	{	1217	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1124	struct coro *coro_src = SvSTATE (src);	1218	OUTPUT:
1125		1219	RETVAL
1126	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1127
1128	++coro_src->refcnt;
1129	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1130	}
1131		1220
1132	void	1221	void
1133	_exit (code)	1222	_exit (code)
1134	int code	1223	int code
1135	PROTOTYPE: $	1224	PROTOTYPE: $
1136	CODE:	1225	CODE:
1137	_exit (code);	1226	_exit (code);
1138		1227
		1228	int
		1229	cctx_count ()
		1230	CODE:
		1231	RETVAL = cctx_count;
		1232	OUTPUT:
		1233	RETVAL
		1234
		1235	int
		1236	cctx_idle ()
		1237	CODE:
		1238	RETVAL = cctx_idle;
		1239	OUTPUT:
		1240	RETVAL
		1241
1139	MODULE = Coro::State PACKAGE = Coro	1242	MODULE = Coro::State PACKAGE = Coro
1140		1243
1141	BOOT:	1244	BOOT:
1142	{	1245	{
1143	int i;	1246	int i;
…		…
1149	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1252	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1150	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1253	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1151	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1254	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1152	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1255	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1153		1256
1154	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1257	coro_current = get_sv ("Coro::current", FALSE);
1155	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1258	SvREADONLY_on (coro_current);
1156		1259
1157	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1260	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1158	coro_ready[i] = newAV ();	1261	coro_ready[i] = newAV ();
1159		1262
1160	{	1263	{
1161	SV *sv = perl_get_sv("Coro::API", 1);	1264	SV *sv = perl_get_sv("Coro::API", 1);
1162		1265
1163	coroapi.schedule = api_schedule;	1266	coroapi.schedule = api_schedule;
		1267	coroapi.save = api_save;
1164	coroapi.cede = api_cede;	1268	coroapi.cede = api_cede;
		1269	coroapi.cede_notself = api_cede_notself;
1165	coroapi.ready = api_ready;	1270	coroapi.ready = api_ready;
		1271	coroapi.is_ready = api_is_ready;
1166	coroapi.nready = &coro_nready;	1272	coroapi.nready = &coro_nready;
1167	coroapi.current = coro_current;	1273	coroapi.current = coro_current;
1168		1274
1169	GCoroAPI = &coroapi;	1275	GCoroAPI = &coroapi;
1170	sv_setiv (sv, (IV)&coroapi);	1276	sv_setiv (sv, (IV)&coroapi);
1171	SvREADONLY_on (sv);	1277	SvREADONLY_on (sv);
1172	}	1278	}
1173	}	1279	}
		1280
		1281	void
		1282	_set_current (SV *current)
		1283	PROTOTYPE: $
		1284	CODE:
		1285	SvREFCNT_dec (SvRV (coro_current));
		1286	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1174		1287
1175	int	1288	int
1176	prio (Coro::State coro, int newprio = 0)	1289	prio (Coro::State coro, int newprio = 0)
1177	ALIAS:	1290	ALIAS:
1178	nice = 1	1291	nice = 1
…		…
1181	RETVAL = coro->prio;	1294	RETVAL = coro->prio;
1182		1295
1183	if (items > 1)	1296	if (items > 1)
1184	{	1297	{
1185	if (ix)	1298	if (ix)
1186	newprio += coro->prio;	1299	newprio = coro->prio - newprio;
1187		1300
1188	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1301	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1189	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1302	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1190		1303
1191	coro->prio = newprio;	1304	coro->prio = newprio;
1192	}	1305	}
1193	}	1306	}
		1307	OUTPUT:
		1308	RETVAL
1194		1309
1195	void	1310	SV *
1196	ready (SV *self)	1311	ready (SV *self)
1197	PROTOTYPE: $	1312	PROTOTYPE: $
1198	CODE:	1313	CODE:
1199	api_ready (self);	1314	RETVAL = boolSV (api_ready (self));
		1315	OUTPUT:
		1316	RETVAL
		1317
		1318	SV *
		1319	is_ready (SV *self)
		1320	PROTOTYPE: $
		1321	CODE:
		1322	RETVAL = boolSV (api_is_ready (self));
		1323	OUTPUT:
		1324	RETVAL
1200		1325
1201	int	1326	int
1202	nready (...)	1327	nready (...)
1203	PROTOTYPE:	1328	PROTOTYPE:
1204	CODE:	1329	CODE:
…		…
1210		1335
1211	SV *	1336	SV *
1212	_get_state ()	1337	_get_state ()
1213	CODE:	1338	CODE:
1214	{	1339	{
1215	struct {	1340	struct io_state *data;
1216	int errorno;
1217	int laststype;
1218	int laststatval;
1219	Stat_t statcache;
1220	} data;
1221		1341
		1342	RETVAL = newSV (sizeof (struct io_state));
		1343	data = (struct io_state *)SvPVX (RETVAL);
		1344	SvCUR_set (RETVAL, sizeof (struct io_state));
		1345	SvPOK_only (RETVAL);
		1346
1222	data.errorno = errno;	1347	data->errorno = errno;
1223	data.laststype = PL_laststype;	1348	data->laststype = PL_laststype;
1224	data.laststatval = PL_laststatval;	1349	data->laststatval = PL_laststatval;
1225	data.statcache = PL_statcache;	1350	data->statcache = PL_statcache;
1226
1227	RETVAL = newSVpvn ((char *)&data, sizeof data);
1228	}	1351	}
1229	OUTPUT:	1352	OUTPUT:
1230	RETVAL	1353	RETVAL
1231		1354
1232	void	1355	void
1233	_set_state (char *data_)	1356	_set_state (char *data_)
1234	PROTOTYPE: $	1357	PROTOTYPE: $
1235	CODE:	1358	CODE:
1236	{	1359	{
1237	struct {	1360	struct io_state data = (void )data_;
1238	int errorno;
1239	int laststype;
1240	int laststatval;
1241	Stat_t statcache;
1242	} data = (void )data_;
1243		1361
1244	errno = data->errorno;	1362	errno = data->errorno;
1245	PL_laststype = data->laststype;	1363	PL_laststype = data->laststype;
1246	PL_laststatval = data->laststatval;	1364	PL_laststatval = data->laststatval;
1247	PL_statcache = data->statcache;	1365	PL_statcache = data->statcache;
1248	}	1366	}
		1367

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Comparing Coro/Coro/State.xs (file contents): Revision 1.101 by root, Mon Nov 27 00:08:18 2006 UTC vs. Revision 1.135 by root, Fri Jan 5 18:25:51 2007 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.101 by root, Mon Nov 27 00:08:18 2006 UTC vs.
Revision 1.135 by root, Fri Jan 5 18:25:51 2007 UTC