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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.104 by root, Mon Nov 27 01:51:02 2006 UTC vs.
Revision 1.135 by root, Fri Jan 5 18:25:51 2007 UTC

…		…
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		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
9	#if USE_VALGRIND	36	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>	37	# include <valgrind/valgrind.h>
11	#endif	38	#endif
		39
		40	/* the maximum number of idle cctx that will be pooled */
		41	#define MAX_IDLE_CCTX 8
12		42
13	#define PERL_VERSION_ATLEAST(a,b,c) \	43	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \	44	(PERL_REVISION > (a) \
15	\|\| (PERL_REVISION == (a) \	45	\|\| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \	46	&& (PERL_VERSION > (b) \
…		…
35	# ifndef IS_PADCONST	65	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0	66	# define IS_PADCONST(v) 0
37	# endif	67	# endif
38	#endif	68	#endif
39		69
40	#include <stdio.h>	70	/* 5.8.7 */
41	#include <errno.h>	71	#ifndef SvRV_set
		72	# define SvRV_set(s,v) SvRV(s) = (v)
		73	#endif
42		74
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44	# undef STACKGUARD	76	# undef STACKGUARD
45	#endif	77	#endif
46		78
47	#ifndef STACKGUARD	79	#ifndef STACKGUARD
48	# define STACKGUARD 0	80	# define STACKGUARD 0
49	#endif	81	#endif
50		82
51	#ifdef HAVE_MMAP	83	/* prefer perl internal functions over our own? */
52	# include <unistd.h>	84	#ifndef PREFER_PERL_FUNCTIONS
53	# include <sys/mman.h>	85	# define PREFER_PERL_FUNCTIONS 0
54	# ifndef MAP_ANONYMOUS
55	# ifdef MAP_ANON
56	# define MAP_ANONYMOUS MAP_ANON
57	# else
58	# undef HAVE_MMAP
59	# endif
60	# endif
61	# include <limits.h>
62	# ifndef PAGESIZE
63	# define PAGESIZE pagesize
64	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
65	static long pagesize;
66	# else
67	# define BOOT_PAGESIZE
68	# endif
69	#endif	86	#endif
70		87
71	/* 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
72	* 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
73	* and should be unique. */	90	* and should be unique. */
…		…
76		93
77	#define IN_DESTRUCT (PL_main_cv == Nullcv)	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
78		95
79	#if __GNUC__ >= 3	96	#if __GNUC__ >= 3
80	# define attribute(x) __attribute__(x)	97	# define attribute(x) __attribute__(x)
		98	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
81	#else	99	#else
82	# define attribute(x)	100	# define attribute(x)
		101	# define BARRIER
83	#endif	102	#endif
84		103
85	#define NOINLINE attribute ((noinline))	104	#define NOINLINE attribute ((noinline))
86		105
87	#include "CoroAPI.h"	106	#include "CoroAPI.h"
88
89	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
90		107
91	#ifdef USE_ITHREADS	108	#ifdef USE_ITHREADS
92	static perl_mutex coro_mutex;	109	static perl_mutex coro_mutex;
93	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	110	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
94	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	111	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
95	#else	112	#else
96	# define LOCK (void)0	113	# define LOCK (void)0
97	# define UNLOCK (void)0	114	# define UNLOCK (void)0
98	#endif	115	#endif
99		116
		117	struct io_state
		118	{
		119	int errorno;
		120	I32 laststype;
		121	int laststatval;
		122	Stat_t statcache;
		123	};
		124
100	static struct CoroAPI coroapi;	125	static struct CoroAPI coroapi;
101	static AV main_mainstack; / used to differentiate between $main and others */	126	static AV main_mainstack; / used to differentiate between $main and others */
102	static HV coro_state_stash, coro_stash;	127	static HV coro_state_stash, coro_stash;
103	static SV coro_mortal; / will be freed after next transfer */	128	static SV coro_mortal; / will be freed after next transfer */
104		129
		130	static struct coro_cctx *cctx_first;
		131	static int cctx_count, cctx_idle;
		132
105	/* this is a structure representing a c-level coroutine */	133	/* this is a structure representing a c-level coroutine */
106	typedef struct coro_stack {	134	typedef struct coro_cctx {
107	struct coro_stack *next;	135	struct coro_cctx *next;
108		136
109	/* the stack */	137	/* the stack */
110	void *sptr;	138	void *sptr;
111	long ssize; /* positive == mmap, otherwise malloc */	139	long ssize; /* positive == mmap, otherwise malloc */
112		140
113	/* cpu state */	141	/* cpu state */
114	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 */
115	JMPENV *top_env;	144	JMPENV *top_env;
116	coro_context cctx;	145	coro_context cctx;
117		146
		147	int inuse;
		148
118	#if USE_VALGRIND	149	#if USE_VALGRIND
119	int valgrind_id;	150	int valgrind_id;
120	#endif	151	#endif
121	} coro_stack;	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	};
122		160
123	/* this is a structure representing a perl-level coroutine */	161	/* this is a structure representing a perl-level coroutine */
124	struct coro {	162	struct coro {
125	/* the c coroutine allocated to this perl coroutine, if any */	163	/* the c coroutine allocated to this perl coroutine, if any */
126	coro_stack *stack;	164	coro_cctx *cctx;
127		165
128	/* data associated with this coroutine (initial args) */	166	/* data associated with this coroutine (initial args) */
129	AV *args;	167	AV *args;
130	int refcnt;	168	int refcnt;
		169	int save; /* CORO_SAVE flags */
		170	int flags; /* CF_ flags */
131		171
132	/* optionally saved, might be zero */	172	/* optionally saved, might be zero */
133	AV *defav;	173	AV defav; / @_ */
134	SV *defsv;	174	SV defsv; / $_ */
135	SV *errsv;	175	SV errsv; / $@ */
		176	SV irssv; / $/ */
		177	SV irssv_sv; / real $/ cache */
136		178
137	/* saved global state not related to stacks */	179	#define VAR(name,type) type name;
138	U8 dowarn;	180	# include "state.h"
139	I32 in_eval;	181	#undef VAR
140
141	/* the stacks and related info (callchain etc..) */
142	PERL_SI *curstackinfo;
143	AV *curstack;
144	AV *mainstack;
145	SV **stack_sp;
146	OP *op;
147	SV **curpad;
148	AV *comppad;
149	CV *compcv;
150	SV **stack_base;
151	SV **stack_max;
152	SV **tmps_stack;
153	I32 tmps_floor;
154	I32 tmps_ix;
155	I32 tmps_max;
156	I32 *markstack;
157	I32 *markstack_ptr;
158	I32 *markstack_max;
159	I32 *scopestack;
160	I32 scopestack_ix;
161	I32 scopestack_max;
162	ANY *savestack;
163	I32 savestack_ix;
164	I32 savestack_max;
165	OP **retstack;
166	I32 retstack_ix;
167	I32 retstack_max;
168	PMOP *curpm;
169	COP *curcop;
170		182
171	/* coro process data */	183	/* coro process data */
172	int prio;	184	int prio;
173	};	185	};
174		186
…		…
238		250
239	#define PERL_MAGIC_coro PERL_MAGIC_ext	251	#define PERL_MAGIC_coro PERL_MAGIC_ext
240		252
241	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	253	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
242		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
243	/* the next two functions merely cache the padlists */	262	/* the next two functions merely cache the padlists */
244	static void	263	static void
245	get_padlist (CV *cv)	264	get_padlist (CV *cv)
246	{	265	{
247	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	266	MAGIC *mg = CORO_MAGIC (cv);
		267	AV *av;
248		268
249	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	269	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
250	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	270	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
251	else	271	else
252	{	272	{
253	#if 0	273	#if PREFER_PERL_FUNCTIONS
254	/* this is probably cleaner, but also slower? */	274	/* this is probably cleaner, but also slower? */
255	CV *cp = Perl_cv_clone (cv);	275	CV *cp = Perl_cv_clone (cv);
256	CvPADLIST (cv) = CvPADLIST (cp);	276	CvPADLIST (cv) = CvPADLIST (cp);
257	CvPADLIST (cp) = 0;	277	CvPADLIST (cp) = 0;
258	SvREFCNT_dec (cp);	278	SvREFCNT_dec (cp);
…		…
263	}	283	}
264		284
265	static void	285	static void
266	put_padlist (CV *cv)	286	put_padlist (CV *cv)
267	{	287	{
268	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	288	MAGIC *mg = CORO_MAGIC (cv);
		289	AV *av;
269		290
270	if (!mg)	291	if (!mg)
271	{	292	{
272	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	293	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
273	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	294	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
274	mg->mg_virtual = &vtbl_coro;	295	mg->mg_virtual = &vtbl_coro;
275	mg->mg_obj = (SV *)newAV ();	296	mg->mg_obj = (SV *)newAV ();
276	}	297	}
277		298
278	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);
279	}	305	}
280		306
281	#define SB do {	307	#define SB do {
282	#define SE } while (0)	308	#define SE } while (0)
283		309
284	#define LOAD(state) load_state((state));
285	#define SAVE(state,flags) save_state((state),(flags));
286
287	#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
288		311
289	static void	312	static void
290	load_state(Coro__State c)	313	load_perl (Coro__State c)
291	{	314	{
292	PL_dowarn = c->dowarn;	315	#define VAR(name,type) PL_ ## name = c->name;
293	PL_in_eval = c->in_eval;	316	# include "state.h"
294		317	#undef VAR
295	PL_curstackinfo = c->curstackinfo;
296	PL_curstack = c->curstack;
297	PL_mainstack = c->mainstack;
298	PL_stack_sp = c->stack_sp;
299	PL_op = c->op;
300	PL_curpad = c->curpad;
301	PL_comppad = c->comppad;
302	PL_compcv = c->compcv;
303	PL_stack_base = c->stack_base;
304	PL_stack_max = c->stack_max;
305	PL_tmps_stack = c->tmps_stack;
306	PL_tmps_floor = c->tmps_floor;
307	PL_tmps_ix = c->tmps_ix;
308	PL_tmps_max = c->tmps_max;
309	PL_markstack = c->markstack;
310	PL_markstack_ptr = c->markstack_ptr;
311	PL_markstack_max = c->markstack_max;
312	PL_scopestack = c->scopestack;
313	PL_scopestack_ix = c->scopestack_ix;
314	PL_scopestack_max = c->scopestack_max;
315	PL_savestack = c->savestack;
316	PL_savestack_ix = c->savestack_ix;
317	PL_savestack_max = c->savestack_max;
318	#if !PERL_VERSION_ATLEAST (5,9,0)
319	PL_retstack = c->retstack;
320	PL_retstack_ix = c->retstack_ix;
321	PL_retstack_max = c->retstack_max;
322	#endif
323	PL_curpm = c->curpm;
324	PL_curcop = c->curcop;
325		318
326	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	319	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
327	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	320	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
328	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	}
329		333
330	{	334	{
331	dSP;	335	dSP;
332	CV *cv;	336	CV *cv;
333		337
334	/* now do the ugly restore mess */	338	/* now do the ugly restore mess */
335	while ((cv = (CV *)POPs))	339	while ((cv = (CV *)POPs))
336	{	340	{
337	AV padlist = (AV )POPs;
338
339	if (padlist)
340	{
341	put_padlist (cv); /* mark this padlist as available */	341	put_padlist (cv); /* mark this padlist as available */
342	CvPADLIST(cv) = padlist;	342	CvDEPTH (cv) = PTR2IV (POPs);
343	}	343	CvPADLIST (cv) = (AV *)POPs;
344
345	++CvDEPTH(cv);
346	}	344	}
347		345
348	PUTBACK;	346	PUTBACK;
349	}	347	}
350	}	348	}
351		349
352	static void	350	static void
353	save_state(Coro__State c, int flags)	351	save_perl (Coro__State c)
354	{	352	{
355	{	353	{
356	dSP;	354	dSP;
357	I32 cxix = cxstack_ix;	355	I32 cxix = cxstack_ix;
358	PERL_CONTEXT *ccstk = cxstack;	356	PERL_CONTEXT *ccstk = cxstack;
…		…
361	/*	359	/*
362	* 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
363	* (and reinitialize) all cv's in the whole callchain :(	361	* (and reinitialize) all cv's in the whole callchain :(
364	*/	362	*/
365		363
		364	EXTEND (SP, 3 + 1);
366	PUSHs (Nullsv);	365	PUSHs (Nullsv);
367	/* this loop was inspired by pp_caller */	366	/* this loop was inspired by pp_caller */
368	for (;;)	367	for (;;)
369	{	368	{
370	while (cxix >= 0)	369	while (cxix >= 0)
371	{	370	{
372	PERL_CONTEXT *cx = &ccstk[cxix--];	371	PERL_CONTEXT *cx = &ccstk[cxix--];
373		372
374	if (CxTYPE(cx) == CXt_SUB)	373	if (CxTYPE (cx) == CXt_SUB)
375	{	374	{
376	CV *cv = cx->blk_sub.cv;	375	CV *cv = cx->blk_sub.cv;
		376
377	if (CvDEPTH(cv))	377	if (CvDEPTH (cv))
378	{	378	{
379	EXTEND (SP, CvDEPTH(cv)*2);	379	EXTEND (SP, 3);
380
381	while (--CvDEPTH(cv))
382	{
383	/* this tells the restore code to increment CvDEPTH */
384	PUSHs (Nullsv);
385	PUSHs ((SV *)cv);
386	}
387
388	PUSHs ((SV *)CvPADLIST(cv));	380	PUSHs ((SV *)CvPADLIST (cv));
		381	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
389	PUSHs ((SV *)cv);	382	PUSHs ((SV *)cv);
390		383
		384	CvDEPTH (cv) = 0;
391	get_padlist (cv);	385	get_padlist (cv);
392	}	386	}
393	}	387	}
394	#ifdef CXt_FORMAT
395	else if (CxTYPE(cx) == CXt_FORMAT)
396	{
397	/* I never used formats, so how should I know how these are implemented? */
398	/* my bold guess is as a simple, plain sub... */
399	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
400	}
401	#endif
402	}	388	}
403		389
404	if (top_si->si_type == PERLSI_MAIN)	390	if (top_si->si_type == PERLSI_MAIN)
405	break;	391	break;
406		392
…		…
410	}	396	}
411		397
412	PUTBACK;	398	PUTBACK;
413	}	399	}
414		400
415	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;
416	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	402	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
417	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;
418		405
419	c->dowarn = PL_dowarn;	406	#define VAR(name,type)c->name = PL_ ## name;
420	c->in_eval = PL_in_eval;	407	# include "state.h"
421		408	#undef VAR
422	c->curstackinfo = PL_curstackinfo;
423	c->curstack = PL_curstack;
424	c->mainstack = PL_mainstack;
425	c->stack_sp = PL_stack_sp;
426	c->op = PL_op;
427	c->curpad = PL_curpad;
428	c->comppad = PL_comppad;
429	c->compcv = PL_compcv;
430	c->stack_base = PL_stack_base;
431	c->stack_max = PL_stack_max;
432	c->tmps_stack = PL_tmps_stack;
433	c->tmps_floor = PL_tmps_floor;
434	c->tmps_ix = PL_tmps_ix;
435	c->tmps_max = PL_tmps_max;
436	c->markstack = PL_markstack;
437	c->markstack_ptr = PL_markstack_ptr;
438	c->markstack_max = PL_markstack_max;
439	c->scopestack = PL_scopestack;
440	c->scopestack_ix = PL_scopestack_ix;
441	c->scopestack_max = PL_scopestack_max;
442	c->savestack = PL_savestack;
443	c->savestack_ix = PL_savestack_ix;
444	c->savestack_max = PL_savestack_max;
445	#if !PERL_VERSION_ATLEAST (5,9,0)
446	c->retstack = PL_retstack;
447	c->retstack_ix = PL_retstack_ix;
448	c->retstack_max = PL_retstack_max;
449	#endif
450	c->curpm = PL_curpm;
451	c->curcop = PL_curcop;
452	}	409	}
453		410
454	/*	411	/*
455	* allocate various perl stacks. This is an exact copy	412	* allocate various perl stacks. This is an exact copy
456	* of perl.c:init_stacks, except that it uses less memory	413	* of perl.c:init_stacks, except that it uses less memory
457	* on the (sometimes correct) assumption that coroutines do	414	* on the (sometimes correct) assumption that coroutines do
458	* not usually need a lot of stackspace.	415	* not usually need a lot of stackspace.
459	*/	416	*/
		417	#if PREFER_PERL_FUNCTIONS
		418	# define coro_init_stacks init_stacks
		419	#else
460	static void	420	static void
461	coro_init_stacks ()	421	coro_init_stacks ()
462	{	422	{
463	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	423	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
464	PL_curstackinfo->si_type = PERLSI_MAIN;	424	PL_curstackinfo->si_type = PERLSI_MAIN;
465	PL_curstack = PL_curstackinfo->si_stack;	425	PL_curstack = PL_curstackinfo->si_stack;
466	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	426	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
467		427
468	PL_stack_base = AvARRAY(PL_curstack);	428	PL_stack_base = AvARRAY(PL_curstack);
469	PL_stack_sp = PL_stack_base;	429	PL_stack_sp = PL_stack_base;
470	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	430	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
471		431
472	New(50,PL_tmps_stack,96,SV*);	432	New(50,PL_tmps_stack,128,SV*);
473	PL_tmps_floor = -1;	433	PL_tmps_floor = -1;
474	PL_tmps_ix = -1;	434	PL_tmps_ix = -1;
475	PL_tmps_max = 96;	435	PL_tmps_max = 128;
476		436
477	New(54,PL_markstack,16,I32);	437	New(54,PL_markstack,32,I32);
478	PL_markstack_ptr = PL_markstack;	438	PL_markstack_ptr = PL_markstack;
479	PL_markstack_max = PL_markstack + 16;	439	PL_markstack_max = PL_markstack + 32;
480		440
481	#ifdef SET_MARK_OFFSET	441	#ifdef SET_MARK_OFFSET
482	SET_MARK_OFFSET;	442	SET_MARK_OFFSET;
483	#endif	443	#endif
484		444
485	New(54,PL_scopestack,16,I32);	445	New(54,PL_scopestack,32,I32);
486	PL_scopestack_ix = 0;	446	PL_scopestack_ix = 0;
487	PL_scopestack_max = 16;	447	PL_scopestack_max = 32;
488		448
489	New(54,PL_savestack,96,ANY);	449	New(54,PL_savestack,64,ANY);
490	PL_savestack_ix = 0;	450	PL_savestack_ix = 0;
491	PL_savestack_max = 96;	451	PL_savestack_max = 64;
492		452
493	#if !PERL_VERSION_ATLEAST (5,9,0)	453	#if !PERL_VERSION_ATLEAST (5,9,0)
494	New(54,PL_retstack,8,OP*);	454	New(54,PL_retstack,16,OP*);
495	PL_retstack_ix = 0;	455	PL_retstack_ix = 0;
496	PL_retstack_max = 8;	456	PL_retstack_max = 16;
497	#endif	457	#endif
498	}	458	}
		459	#endif
499		460
500	/*	461	/*
501	* destroy the stacks, the callchain etc...	462	* destroy the stacks, the callchain etc...
502	*/	463	*/
503	static void	464	static void
504	coro_destroy_stacks()	465	coro_destroy_stacks ()
505	{	466	{
506	if (!IN_DESTRUCT)	467	if (!IN_DESTRUCT)
507	{	468	{
508	/* is this ugly, I ask? */	469	/* restore all saved variables and stuff */
509	LEAVE_SCOPE (0);	470	LEAVE_SCOPE (0);
		471	assert (PL_tmps_floor == -1);
510		472
511	/* sure it is, but more important: is it correct?? :/ */	473	/* free all temporaries */
512	FREETMPS;	474	FREETMPS;
		475	assert (PL_tmps_ix == -1);
513		476
		477	/* unwind all extra stacks */
514	/POPSTACK_TO (PL_mainstack);//D//use/	478	POPSTACK_TO (PL_mainstack);
		479
		480	/* unwind main stack */
		481	dounwind (-1);
515	}	482	}
516		483
517	while (PL_curstackinfo->si_next)	484	while (PL_curstackinfo->si_next)
518	PL_curstackinfo = PL_curstackinfo->si_next;	485	PL_curstackinfo = PL_curstackinfo->si_next;
519		486
520	while (PL_curstackinfo)	487	while (PL_curstackinfo)
521	{	488	{
522	PERL_SI *p = PL_curstackinfo->si_prev;	489	PERL_SI *p = PL_curstackinfo->si_prev;
523		490
524	{ /D//remove/
525	dSP;
526	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527	PUTBACK; /* possibly superfluous */
528	}
529
530	if (!IN_DESTRUCT)	491	if (!IN_DESTRUCT)
531	{
532	dounwind (-1);/D//remove/
533	SvREFCNT_dec (PL_curstackinfo->si_stack);	492	SvREFCNT_dec (PL_curstackinfo->si_stack);
534	}
535		493
536	Safefree (PL_curstackinfo->si_cxstack);	494	Safefree (PL_curstackinfo->si_cxstack);
537	Safefree (PL_curstackinfo);	495	Safefree (PL_curstackinfo);
538	PL_curstackinfo = p;	496	PL_curstackinfo = p;
539	}	497	}
…		…
554	* emulate part of the perl startup here.	512	* emulate part of the perl startup here.
555	*/	513	*/
556		514
557	coro_init_stacks ();	515	coro_init_stacks ();
558		516
559	PL_curcop = 0;	517	PL_curcop = &PL_compiling;
560	PL_in_eval = 0;	518	PL_in_eval = EVAL_NULL;
561	PL_curpm = 0;	519	PL_curpm = 0;
		520	PL_localizing = 0;
		521	PL_dirty = 0;
		522	PL_restartop = 0;
562		523
563	{	524	{
564	dSP;	525	dSP;
565	LOGOP myop;	526	LOGOP myop;
566		527
567	/* I have no idea why this is needed, but it is */
568	PUSHMARK (SP);
569
570	SvREFCNT_dec (GvAV (PL_defgv));	528	SvREFCNT_dec (GvAV (PL_defgv));
571	GvAV (PL_defgv) = coro->args; coro->args = 0;	529	GvAV (PL_defgv) = coro->args; coro->args = 0;
572		530
573	Zero (&myop, 1, LOGOP);	531	Zero (&myop, 1, LOGOP);
574	myop.op_next = Nullop;	532	myop.op_next = Nullop;
575	myop.op_flags = OPf_WANT_VOID;	533	myop.op_flags = OPf_WANT_VOID;
576		534
		535	PUSHMARK (SP);
		536	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		537	PUTBACK;
577	PL_op = (OP *)&myop;	538	PL_op = (OP *)&myop;
578
579	PUSHMARK (SP);
580	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
581	PUTBACK;
582	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	539	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
583	SPAGAIN;	540	SPAGAIN;
584
585	ENTER; /* necessary e.g. for dounwind */
586	}	541	}
		542
		543	ENTER; /* necessary e.g. for dounwind */
587	}	544	}
588		545
589	static void	546	static void
590	free_coro_mortal ()	547	free_coro_mortal ()
591	{	548	{
…		…
594	SvREFCNT_dec (coro_mortal);	551	SvREFCNT_dec (coro_mortal);
595	coro_mortal = 0;	552	coro_mortal = 0;
596	}	553	}
597	}	554	}
598		555
		556	/* inject a fake call to Coro::State::_cctx_init into the execution */
599	static void NOINLINE	557	static void NOINLINE
600	prepare_cctx (coro_stack *cctx)	558	prepare_cctx (coro_cctx *cctx)
601	{	559	{
602	dSP;	560	dSP;
603	LOGOP myop;	561	LOGOP myop;
604		562
605	Zero (&myop, 1, LOGOP);	563	Zero (&myop, 1, LOGOP);
606	myop.op_next = PL_op;	564	myop.op_next = PL_op;
607	myop.op_flags = OPf_WANT_VOID;	565	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
608
609	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
610		566
611	PUSHMARK (SP);	567	PUSHMARK (SP);
		568	EXTEND (SP, 2);
		569	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
612	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	570	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
613	PUTBACK;	571	PUTBACK;
		572	PL_op = (OP *)&myop;
614	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	573	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
615	SPAGAIN;	574	SPAGAIN;
616	}	575	}
617		576
618	static void	577	static void
619	coro_run (void *arg)	578	coro_run (void *arg)
620	{	579	{
621	/* coro_run is the alternative epilogue of transfer() */	580	/* coro_run is the alternative tail of transfer(), so unlock here. */
622	UNLOCK;	581	UNLOCK;
623		582
624	/*	583	/*
625	* this is a _very_ stripped down perl interpreter ;)	584	* this is a _very_ stripped down perl interpreter ;)
626	*/	585	*/
627	PL_top_env = &PL_start_env;	586	PL_top_env = &PL_start_env;
		587
628	/* inject call to cctx_init */	588	/* inject call to cctx_init */
629	prepare_cctx ((coro_stack *)arg);	589	prepare_cctx ((coro_cctx *)arg);
630		590
631	/* somebody will hit me for both perl_run and PL_restartop */	591	/* somebody will hit me for both perl_run and PL_restartop */
		592	PL_restartop = PL_op;
632	perl_run (PL_curinterp);	593	perl_run (PL_curinterp);
633		594
634	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);
635	abort ();	596	abort ();
636	}	597	}
637		598
638	static coro_stack *	599	static coro_cctx *
639	stack_new ()	600	cctx_new ()
640	{	601	{
641	coro_stack *stack;	602	coro_cctx *cctx;
642		603
		604	++cctx_count;
		605
643	New (0, stack, 1, coro_stack);	606	Newz (0, cctx, 1, coro_cctx);
644		607
645	#if HAVE_MMAP	608	#if HAVE_MMAP
646		609
647	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	610	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
648	/* mmap suppsedly does allocate-on-write for us */	611	/* mmap supposedly does allocate-on-write for us */
649	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);
650		613
651	if (stack->sptr == (void *)-1)	614	if (cctx->sptr == (void *)-1)
652	{	615	{
653	perror ("FATAL: unable to mmap stack for coroutine");	616	perror ("FATAL: unable to mmap stack for coroutine");
654	_exit (EXIT_FAILURE);	617	_exit (EXIT_FAILURE);
655	}	618	}
656		619
657	# if STACKGUARD	620	# if STACKGUARD
658	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	621	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
659	# endif	622	# endif
660		623
661	#else	624	#else
662		625
663	stack->ssize = STACKSIZE * (long)sizeof (long);	626	cctx->ssize = STACKSIZE * (long)sizeof (long);
664	New (0, stack->sptr, STACKSIZE, long);	627	New (0, cctx->sptr, STACKSIZE, long);
665		628
666	if (!stack->sptr)	629	if (!cctx->sptr)
667	{	630	{
668	perror (stderr, "FATAL: unable to malloc stack for coroutine");	631	perror ("FATAL: unable to malloc stack for coroutine");
669	_exit (EXIT_FAILURE);	632	_exit (EXIT_FAILURE);
670	}	633	}
671		634
672	#endif	635	#endif
673		636
674	#if USE_VALGRIND	637	#if USE_VALGRIND
675	stack->valgrind_id = VALGRIND_STACK_REGISTER (	638	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
676	STACKGUARD * PAGESIZE + (char *)stack->sptr,	639	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
677	stack->ssize + (char *)stack->sptr	640	cctx->ssize + (char *)cctx->sptr
678	);	641	);
679	#endif	642	#endif
680		643
681	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);
682		645
683	return stack;	646	return cctx;
684	}	647	}
685		648
686	static void	649	static void
687	stack_free (coro_stack *stack)	650	cctx_destroy (coro_cctx *cctx)
688	{	651	{
689	if (!stack)	652	if (!cctx)
690	return;	653	return;
691		654
		655	--cctx_count;
		656
692	#if USE_VALGRIND	657	#if USE_VALGRIND
693	VALGRIND_STACK_DEREGISTER (stack->valgrind_id);	658	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
694	#endif	659	#endif
695		660
696	#if HAVE_MMAP	661	#if HAVE_MMAP
697	munmap (stack->sptr, stack->ssize);	662	munmap (cctx->sptr, cctx->ssize);
698	#else	663	#else
699	Safefree (stack->sptr);	664	Safefree (cctx->sptr);
700	#endif	665	#endif
701		666
702	Safefree (stack);	667	Safefree (cctx);
703	}	668	}
704		669
705	static coro_stack *stack_first;
706	static int cctx_count, cctx_idle;
707
708	static coro_stack *	670	static coro_cctx *
709	stack_get ()	671	cctx_get ()
710	{	672	{
711	coro_stack *stack;	673	coro_cctx *cctx;
712		674
713	if (stack_first)	675	if (cctx_first)
714	{	676	{
		677	cctx = cctx_first;
		678	cctx_first = cctx->next;
715	--cctx_idle;	679	--cctx_idle;
716	stack = stack_first;
717	stack_first = stack->next;
718	}	680	}
719	else	681	else
720	{	682	{
721	++cctx_count;	683	cctx = cctx_new ();
722	stack = stack_new ();
723	PL_op = PL_op->op_next;	684	PL_op = PL_op->op_next;
724	}	685	}
725		686
726	return stack;	687	return cctx;
727	}	688	}
728		689
729	static void	690	static void
730	stack_put (coro_stack *stack)	691	cctx_put (coro_cctx *cctx)
731	{	692	{
		693	/* free another cctx if overlimit */
		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
732	++cctx_idle;	704	++cctx_idle;
733	stack->next = stack_first;	705	cctx->next = cctx_first;
734	stack_first = stack;	706	cctx_first = cctx;
735	}	707	}
736		708
737	/* never call directly, always through the coro_state_transfer global variable */	709	/* never call directly, always through the coro_state_transfer global variable */
738	static void NOINLINE	710	static void NOINLINE
739	transfer (struct coro prev, struct coro next, int flags)	711	transfer (struct coro prev, struct coro next)
740	{	712	{
741	dSTACKLEVEL;	713	dSTACKLEVEL;
742		714
743	/* sometimes transfer is only called to set idle_sp */	715	/* sometimes transfer is only called to set idle_sp */
744	if (flags == TRANSFER_SET_STACKLEVEL)	716	if (!next)
		717	{
745	((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	}
746	else if (prev != next)	721	else if (prev != next)
747	{	722	{
748	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;
749		746
750	LOCK;	747	LOCK;
751		748
752	if (next->mainstack)	749	if (next->flags & CF_NEW)
753	{	750	{
754	/* coroutine already started */	751	/* need to start coroutine */
755	SAVE (prev, flags);	752	next->flags &= ~CF_NEW;
756	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);
757	}	759	}
758	else	760	else
759	{	761	{
760	/* need to start coroutine */	762	/* coroutine already started */
761	/* first get rid of the old state */	763	save_perl (prev);
762	SAVE (prev, -1);	764	load_perl (next);
763	/* setup coroutine call */
764	setup_coro (next);
765	/* need a stack */
766	next->stack = 0;
767	}	765	}
768		766
769	if (!prev->stack)
770	/* create a new empty context */
771	Newz (0, prev->stack, 1, coro_stack);
772
773	prev__stack = prev->stack;	767	prev__cctx = prev->cctx;
774		768
775	/* possibly "free" the stack */	769	/* possibly "free" the cctx */
776	if (prev__stack->idle_sp == STACKLEVEL)	770	if (prev__cctx->idle_sp == STACKLEVEL)
777	{	771	{
778	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
779	prev->stack = 0;	775	prev->cctx = 0;
		776
		777	cctx_put (prev__cctx);
		778	prev__cctx->inuse = 0;
780	}	779	}
781		780
782	if (!next->stack)	781	if (!next->cctx)
783	next->stack = stack_get ();
784
785	if (prev__stack != next->stack)
786	{	782	{
787	prev__stack->top_env = PL_top_env;	783	next->cctx = cctx_get ();
788	PL_top_env = next->stack->top_env;	784	assert (!next->cctx->inuse);
789	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	785	next->cctx->inuse = 1;
790	}	786	}
791		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
792	free_coro_mortal ();	795	free_coro_mortal ();
793
794	UNLOCK;	796	UNLOCK;
795	}	797	}
796	}	798	}
797		799
798	struct transfer_args	800	struct transfer_args
799	{	801	{
800	struct coro prev, next;	802	struct coro prev, next;
801	int flags;
802	};	803	};
803		804
804	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	805	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
805		806
806	static void	807	static int
807	coro_state_destroy (struct coro *coro)	808	coro_state_destroy (struct coro *coro)
808	{	809	{
809	if (coro->refcnt--)	810	if (coro->flags & CF_DESTROYED)
810	return;	811	return 0;
		812
		813	coro->flags \|= CF_DESTROYED;
811		814
812	if (coro->mainstack && coro->mainstack != main_mainstack)	815	if (coro->mainstack && coro->mainstack != main_mainstack)
813	{	816	{
		817	assert (!(coro->flags & CF_RUNNING));
		818
814	struct coro temp;	819	struct coro temp;
		820	Zero (&temp, 1, struct coro);
		821	temp.save = CORO_SAVE_ALL;
815		822
816	SAVE ((&temp), TRANSFER_SAVE_ALL);	823	if (coro->flags & CF_RUNNING)
817	LOAD (coro);	824	croak ("FATAL: tried to destroy currently running coroutine");
		825
		826	save_perl (&temp);
		827	load_perl (coro);
818		828
819	coro_destroy_stacks ();	829	coro_destroy_stacks ();
820		830
821	LOAD ((&temp)); /* this will get rid of defsv etc.. */	831	load_perl (&temp); /* this will get rid of defsv etc.. */
822		832
823	coro->mainstack = 0;	833	coro->mainstack = 0;
824	}	834	}
825		835
826	stack_free (coro->stack);	836	cctx_destroy (coro->cctx);
827	SvREFCNT_dec (coro->args);	837	SvREFCNT_dec (coro->args);
828	Safefree (coro);	838
		839	return 1;
829	}	840	}
830		841
831	static int	842	static int
832	coro_state_clear (pTHX_ SV sv, MAGIC mg)	843	coro_state_free (pTHX_ SV sv, MAGIC mg)
833	{	844	{
834	struct coro coro = (struct coro )mg->mg_ptr;	845	struct coro coro = (struct coro )mg->mg_ptr;
835	mg->mg_ptr = 0;	846	mg->mg_ptr = 0;
836		847
		848	if (--coro->refcnt < 0)
		849	{
837	coro_state_destroy (coro);	850	coro_state_destroy (coro);
		851	Safefree (coro);
		852	}
838		853
839	return 0;	854	return 0;
840	}	855	}
841		856
842	static int	857	static int
…		…
849	return 0;	864	return 0;
850	}	865	}
851		866
852	static MGVTBL coro_state_vtbl = {	867	static MGVTBL coro_state_vtbl = {
853	0, 0, 0, 0,	868	0, 0, 0, 0,
854	coro_state_clear,	869	coro_state_free,
855	0,	870	0,
856	#ifdef MGf_DUP	871	#ifdef MGf_DUP
857	coro_state_dup,	872	coro_state_dup,
858	#else	873	#else
859	# define MGf_DUP 0	874	# define MGf_DUP 0
…		…
881	assert (mg->mg_type == PERL_MAGIC_ext);	896	assert (mg->mg_type == PERL_MAGIC_ext);
882	return (struct coro *)mg->mg_ptr;	897	return (struct coro *)mg->mg_ptr;
883	}	898	}
884		899
885	static void	900	static void
886	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)
887	{	902	{
888	ta->prev = SvSTATE (prev);	903	ta->prev = SvSTATE (prev_sv);
889	ta->next = SvSTATE (next);	904	ta->next = SvSTATE (next_sv);
890	ta->flags = flags;
891	}	905	}
892		906
893	static void	907	static void
894	api_transfer (SV prev, SV next, int flags)	908	api_transfer (SV prev_sv, SV next_sv)
895	{	909	{
896	dTHX;
897	struct transfer_args ta;	910	struct transfer_args ta;
898		911
899	prepare_transfer (&ta, prev, next, flags);	912	prepare_transfer (&ta, prev_sv, next_sv);
900	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;
901	}	926	}
902		927
903	/ Coro ******************************************************************/	928	/ Coro ******************************************************************/
904		929
905	#define PRIO_MAX 3	930	#define PRIO_MAX 3
…		…
908	#define PRIO_LOW -1	933	#define PRIO_LOW -1
909	#define PRIO_IDLE -3	934	#define PRIO_IDLE -3
910	#define PRIO_MIN -4	935	#define PRIO_MIN -4
911		936
912	/* for Coro.pm */	937	/* for Coro.pm */
913	static GV coro_current, coro_idle;	938	static SV *coro_current;
914	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	939	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
915	static int coro_nready;	940	static int coro_nready;
916		941
917	static void	942	static void
918	coro_enq (SV *sv)	943	coro_enq (SV *coro_sv)
919	{	944	{
920	int prio;
921
922	if (SvTYPE (sv) != SVt_PVHV)
923	croak ("Coro::ready tried to enqueue something that is not a coroutine");
924
925	prio = SvSTATE (sv)->prio;
926
927	av_push (coro_ready [prio - PRIO_MIN], sv);	945	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
928	coro_nready++;	946	coro_nready++;
929	}	947	}
930		948
931	static SV *	949	static SV *
932	coro_deq (int min_prio)	950	coro_deq (int min_prio)
…		…
945	}	963	}
946		964
947	return 0;	965	return 0;
948	}	966	}
949		967
950	static void	968	static int
951	api_ready (SV *coro)	969	api_ready (SV *coro_sv)
952	{	970	{
953	dTHX;	971	struct coro *coro;
954		972
955	if (SvROK (coro))	973	if (SvROK (coro_sv))
956	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;
957		982
958	LOCK;	983	LOCK;
959	coro_enq (SvREFCNT_inc (coro));	984	coro_enq (SvREFCNT_inc (coro_sv));
960	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);
961	}	994	}
962		995
963	static void	996	static void
964	prepare_schedule (struct transfer_args *ta)	997	prepare_schedule (struct transfer_args *ta)
965	{	998	{
966	SV current, prev, *next;	999	SV prev_sv, next_sv;
967
968	current = GvSV (coro_current);
969		1000
970	for (;;)	1001	for (;;)
971	{	1002	{
972	LOCK;	1003	LOCK;
973	next = coro_deq (PRIO_MIN);	1004	next_sv = coro_deq (PRIO_MIN);
974	UNLOCK;	1005	UNLOCK;
975		1006
		1007	/* nothing to schedule: call the idle handler */
976	if (next)	1008	if (!next_sv)
977	break;
978
979	{	1009	{
980	dSP;	1010	dSP;
981		1011
982	ENTER;	1012	ENTER;
983	SAVETMPS;	1013	SAVETMPS;
984		1014
985	PUSHMARK (SP);	1015	PUSHMARK (SP);
986	PUTBACK;	1016	PUTBACK;
987	call_sv (GvSV (coro_idle), G_DISCARD);	1017	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
988		1018
989	FREETMPS;	1019	FREETMPS;
990	LEAVE;	1020	LEAVE;
		1021	continue;
991	}	1022	}
992	}
993		1023
994	prev = SvRV (current);	1024	ta->next = SvSTATE (next_sv);
995	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	}
996		1035
997	/* 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
998	LOCK;	1044	LOCK;
999	free_coro_mortal ();	1045	free_coro_mortal ();
		1046	coro_mortal = prev_sv;
1000	UNLOCK;	1047	UNLOCK;
1001	coro_mortal = prev;
1002
1003	ta->prev = SvSTATE (prev);
1004	ta->next = SvSTATE (next);
1005	ta->flags = TRANSFER_SAVE_ALL;
1006	}	1048	}
1007		1049
1008	static void	1050	static void
1009	prepare_cede (struct transfer_args *ta)	1051	prepare_cede (struct transfer_args *ta)
1010	{	1052	{
1011	LOCK;	1053	api_ready (coro_current);
1012	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1013	UNLOCK;
1014
1015	prepare_schedule (ta);	1054	prepare_schedule (ta);
1016	}	1055	}
1017		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
1018	static void	1071	static void
1019	api_schedule (void)	1072	api_schedule (void)
1020	{	1073	{
1021	dTHX;
1022	struct transfer_args ta;	1074	struct transfer_args ta;
1023		1075
1024	prepare_schedule (&ta);	1076	prepare_schedule (&ta);
1025	TRANSFER (ta);	1077	TRANSFER (ta);
1026	}	1078	}
1027		1079
1028	static void	1080	static int
1029	api_cede (void)	1081	api_cede (void)
1030	{	1082	{
1031	dTHX;
1032	struct transfer_args ta;	1083	struct transfer_args ta;
1033		1084
1034	prepare_cede (&ta);	1085	prepare_cede (&ta);
		1086
		1087	if (ta.prev != ta.next)
		1088	{
1035	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;
1036	}	1108	}
1037		1109
1038	MODULE = Coro::State PACKAGE = Coro::State	1110	MODULE = Coro::State PACKAGE = Coro::State
1039		1111
1040	PROTOTYPES: DISABLE	1112	PROTOTYPES: DISABLE
…		…
1046	#endif	1118	#endif
1047	BOOT_PAGESIZE;	1119	BOOT_PAGESIZE;
1048		1120
1049	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1121	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1050		1122
1051	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1123	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1052	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1124	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1053	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));
1054		1128
1055	main_mainstack = PL_mainstack;	1129	main_mainstack = PL_mainstack;
1056		1130
1057	coroapi.ver = CORO_API_VERSION;	1131	coroapi.ver = CORO_API_VERSION;
1058	coroapi.transfer = api_transfer;	1132	coroapi.transfer = api_transfer;
…		…
1068	HV *hv;	1142	HV *hv;
1069	int i;	1143	int i;
1070		1144
1071	Newz (0, coro, 1, struct coro);	1145	Newz (0, coro, 1, struct coro);
1072	coro->args = newAV ();	1146	coro->args = newAV ();
		1147	coro->save = CORO_SAVE_ALL;
		1148	coro->flags = CF_NEW;
1073		1149
1074	hv = newHV ();	1150	hv = newHV ();
1075	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;
1076	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1152	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1077		1153
1078	for (i = 1; i < items; i++)	1154	for (i = 1; i < items; i++)
1079	av_push (coro->args, newSVsv (ST (i)));	1155	av_push (coro->args, newSVsv (ST (i)));
1080
1081	/coro->mainstack = 0; //actual work is done inside transfer /
1082	/coro->stack = 0;/
1083	}	1156	}
1084	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:
1085	RETVAL	1165	RETVAL
1086		1166
1087	void	1167	void
1088	_set_stacklevel (...)	1168	_set_stacklevel (...)
1089	ALIAS:	1169	ALIAS:
1090	Coro::State::transfer = 1	1170	Coro::State::transfer = 1
1091	Coro::schedule = 2	1171	Coro::schedule = 2
1092	Coro::cede = 3	1172	Coro::cede = 3
1093	Coro::Cont::yield = 4	1173	Coro::cede_notself = 4
1094	CODE:	1174	CODE:
1095	{	1175	{
1096	struct transfer_args ta;	1176	struct transfer_args ta;
1097		1177
1098	switch (ix)	1178	switch (ix)
1099	{	1179	{
1100	case 0:	1180	case 0:
1101	ta.prev = (struct coro )INT2PTR (coro_stack , SvIV (ST (0)));	1181	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1102	ta.next = 0;	1182	ta.next = 0;
1103	ta.flags = TRANSFER_SET_STACKLEVEL;
1104	break;	1183	break;
1105		1184
1106	case 1:	1185	case 1:
1107	if (items != 3)	1186	if (items != 2)
1108	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);
1109		1188
1110	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1189	prepare_transfer (&ta, ST (0), ST (1));
1111	break;	1190	break;
1112		1191
1113	case 2:	1192	case 2:
1114	prepare_schedule (&ta);	1193	prepare_schedule (&ta);
1115	break;	1194	break;
…		…
1117	case 3:	1196	case 3:
1118	prepare_cede (&ta);	1197	prepare_cede (&ta);
1119	break;	1198	break;
1120		1199
1121	case 4:	1200	case 4:
1122	{	1201	if (!prepare_cede_notself (&ta))
1123	SV *yieldstack;	1202	XSRETURN_EMPTY;
1124	SV *sv;
1125	AV *defav = GvAV (PL_defgv);
1126		1203
1127	yieldstack = *hv_fetch (
1128	(HV *)SvRV (GvSV (coro_current)),
1129	"yieldstack", sizeof ("yieldstack") - 1,
1130	0
1131	);
1132
1133	/* set up @_ -- ugly */
1134	av_clear (defav);
1135	av_fill (defav, items - 1);
1136	while (items--)
1137	av_store (defav, items, SvREFCNT_inc (ST(items)));
1138
1139	sv = av_pop ((AV *)SvRV (yieldstack));
1140	ta.prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1141	ta.next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1142	ta.flags = 0;
1143	SvREFCNT_dec (sv);
1144	}
1145	break;	1204	break;
1146
1147	}	1205	}
1148		1206
		1207	BARRIER;
1149	TRANSFER (ta);	1208	TRANSFER (ta);
1150	}
1151		1209
1152	void	1210	if (GIMME_V != G_VOID && ta.next != ta.prev)
1153	_clone_state_from (SV dst, SV src)	1211	XSRETURN_YES;
		1212	}
		1213
		1214	bool
		1215	_destroy (SV *coro_sv)
1154	CODE:	1216	CODE:
1155	{	1217	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1156	struct coro *coro_src = SvSTATE (src);	1218	OUTPUT:
1157		1219	RETVAL
1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1159
1160	++coro_src->refcnt;
1161	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1162	}
1163		1220
1164	void	1221	void
1165	_exit (code)	1222	_exit (code)
1166	int code	1223	int code
1167	PROTOTYPE: $	1224	PROTOTYPE: $
1168	CODE:	1225	CODE:
1169	_exit (code);	1226	_exit (code);
1170		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
1171	MODULE = Coro::State PACKAGE = Coro	1242	MODULE = Coro::State PACKAGE = Coro
1172		1243
1173	BOOT:	1244	BOOT:
1174	{	1245	{
1175	int i;	1246	int i;
…		…
1181	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1252	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1182	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1253	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1183	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1254	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1184	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1255	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1185		1256
1186	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1257	coro_current = get_sv ("Coro::current", FALSE);
1187	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1258	SvREADONLY_on (coro_current);
1188		1259
1189	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1260	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1190	coro_ready[i] = newAV ();	1261	coro_ready[i] = newAV ();
1191		1262
1192	{	1263	{
1193	SV *sv = perl_get_sv("Coro::API", 1);	1264	SV *sv = perl_get_sv("Coro::API", 1);
1194		1265
1195	coroapi.schedule = api_schedule;	1266	coroapi.schedule = api_schedule;
		1267	coroapi.save = api_save;
1196	coroapi.cede = api_cede;	1268	coroapi.cede = api_cede;
		1269	coroapi.cede_notself = api_cede_notself;
1197	coroapi.ready = api_ready;	1270	coroapi.ready = api_ready;
		1271	coroapi.is_ready = api_is_ready;
1198	coroapi.nready = &coro_nready;	1272	coroapi.nready = &coro_nready;
1199	coroapi.current = coro_current;	1273	coroapi.current = coro_current;
1200		1274
1201	GCoroAPI = &coroapi;	1275	GCoroAPI = &coroapi;
1202	sv_setiv (sv, (IV)&coroapi);	1276	sv_setiv (sv, (IV)&coroapi);
1203	SvREADONLY_on (sv);	1277	SvREADONLY_on (sv);
1204	}	1278	}
1205	}	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)));
1206		1287
1207	int	1288	int
1208	prio (Coro::State coro, int newprio = 0)	1289	prio (Coro::State coro, int newprio = 0)
1209	ALIAS:	1290	ALIAS:
1210	nice = 1	1291	nice = 1
…		…
1213	RETVAL = coro->prio;	1294	RETVAL = coro->prio;
1214		1295
1215	if (items > 1)	1296	if (items > 1)
1216	{	1297	{
1217	if (ix)	1298	if (ix)
1218	newprio += coro->prio;	1299	newprio = coro->prio - newprio;
1219		1300
1220	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1301	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1221	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1302	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1222		1303
1223	coro->prio = newprio;	1304	coro->prio = newprio;
1224	}	1305	}
1225	}	1306	}
		1307	OUTPUT:
		1308	RETVAL
1226		1309
1227	void	1310	SV *
1228	ready (SV *self)	1311	ready (SV *self)
1229	PROTOTYPE: $	1312	PROTOTYPE: $
1230	CODE:	1313	CODE:
1231	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
1232		1325
1233	int	1326	int
1234	nready (...)	1327	nready (...)
1235	PROTOTYPE:	1328	PROTOTYPE:
1236	CODE:	1329	CODE:
…		…
1242		1335
1243	SV *	1336	SV *
1244	_get_state ()	1337	_get_state ()
1245	CODE:	1338	CODE:
1246	{	1339	{
1247	struct {	1340	struct io_state *data;
1248	int errorno;
1249	int laststype;
1250	int laststatval;
1251	Stat_t statcache;
1252	} data;
1253		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
1254	data.errorno = errno;	1347	data->errorno = errno;
1255	data.laststype = PL_laststype;	1348	data->laststype = PL_laststype;
1256	data.laststatval = PL_laststatval;	1349	data->laststatval = PL_laststatval;
1257	data.statcache = PL_statcache;	1350	data->statcache = PL_statcache;
1258
1259	RETVAL = newSVpvn ((char *)&data, sizeof data);
1260	}	1351	}
1261	OUTPUT:	1352	OUTPUT:
1262	RETVAL	1353	RETVAL
1263		1354
1264	void	1355	void
1265	_set_state (char *data_)	1356	_set_state (char *data_)
1266	PROTOTYPE: $	1357	PROTOTYPE: $
1267	CODE:	1358	CODE:
1268	{	1359	{
1269	struct {	1360	struct io_state data = (void )data_;
1270	int errorno;
1271	int laststype;
1272	int laststatval;
1273	Stat_t statcache;
1274	} data = (void )data_;
1275		1361
1276	errno = data->errorno;	1362	errno = data->errorno;
1277	PL_laststype = data->laststype;	1363	PL_laststype = data->laststype;
1278	PL_laststatval = data->laststatval;	1364	PL_laststatval = data->laststatval;
1279	PL_statcache = data->statcache;	1365	PL_statcache = data->statcache;
1280	}	1366	}
		1367

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Comparing Coro/Coro/State.xs (file contents): Revision 1.104 by root, Mon Nov 27 01:51:02 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 1.104 by root, Mon Nov 27 01:51:02 2006 UTC vs.
Revision 1.135 by root, Fri Jan 5 18:25:51 2007 UTC