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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.99 by root, Sun Nov 26 23:53:20 2006 UTC vs.
Revision 1.131 by root, Fri Dec 29 11:37:49 2006 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	#if PERL_VERSION < 6	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
		42
		43	#define PERL_VERSION_ATLEAST(a,b,c) \
		44	(PERL_REVISION > (a) \
		45	|| (PERL_REVISION == (a) \
		46	&& (PERL_VERSION > (b) \
		47	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		48
		49	#if !PERL_VERSION_ATLEAST (5,6,0)
10	# ifndef PL_ppaddr	50	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	51	# define PL_ppaddr ppaddr
12	# endif	52	# endif
13	# ifndef call_sv	53	# ifndef call_sv
14	# define call_sv perl_call_sv	54	# define call_sv perl_call_sv
…		…
25	# ifndef IS_PADCONST	65	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	66	# define IS_PADCONST(v) 0
27	# endif	67	# endif
28	#endif	68	#endif
29		69
30	#include <stdio.h>	70	/* 5.8.7 */
31	#include <errno.h>	71	#ifndef SvRV_set
		72	# define SvRV_set(s,v) SvRV(s) = (v)
		73	#endif
32		74
33	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
34	# undef STACKGUARD	76	# undef STACKGUARD
35	#endif	77	#endif
36		78
37	#ifndef STACKGUARD	79	#ifndef STACKGUARD
38	# define STACKGUARD 0	80	# define STACKGUARD 0
39	#endif	81	#endif
40		82
41	#ifdef HAVE_MMAP	83	/* prefer perl internal functions over our own? */
42	# include <unistd.h>	84	#ifndef PREFER_PERL_FUNCTIONS
43	# include <sys/mman.h>	85	# define PREFER_PERL_FUNCTIONS 0
44	# ifndef MAP_ANONYMOUS
45	# ifdef MAP_ANON
46	# define MAP_ANONYMOUS MAP_ANON
47	# else
48	# undef HAVE_MMAP
49	# endif
50	# endif
51	# include <limits.h>
52	# ifndef PAGESIZE
53	# define PAGESIZE pagesize
54	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
55	static long pagesize;
56	# else
57	# define BOOT_PAGESIZE
58	# endif
59	#endif	86	#endif
60		87
61	/* 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
62	* 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
63	* and should be unique. */	90	* and should be unique. */
64	#define dSTACKLEVEL int stacklevel	91	#define dSTACKLEVEL int stacklevel
65	#define STACKLEVEL ((void *)&stacklevel)	92	#define STACKLEVEL ((void *)&stacklevel)
66		93
67	#define IN_DESTRUCT (PL_main_cv == Nullcv)	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
68		95
		96	#if __GNUC__ >= 3
		97	# define attribute(x) __attribute__(x)
		98	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		99	#else
		100	# define attribute(x)
		101	# define BARRIER
		102	#endif
		103
		104	#define NOINLINE attribute ((noinline))
		105
69	#include "CoroAPI.h"	106	#include "CoroAPI.h"
70
71	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
72		107
73	#ifdef USE_ITHREADS	108	#ifdef USE_ITHREADS
74	static perl_mutex coro_mutex;	109	static perl_mutex coro_mutex;
75	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	110	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
76	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	111	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
77	#else	112	#else
78	# define LOCK (void)0	113	# define LOCK (void)0
79	# define UNLOCK (void)0	114	# define UNLOCK (void)0
80	#endif	115	#endif
81		116
		117	struct io_state
		118	{
		119	int errorno;
		120	I32 laststype;
		121	int laststatval;
		122	Stat_t statcache;
		123	};
		124
82	static struct CoroAPI coroapi;	125	static struct CoroAPI coroapi;
83	static AV *main_mainstack; /* used to differentiate between $main and others */	126	static AV *main_mainstack; /* used to differentiate between $main and others */
84	static HV *coro_state_stash, *coro_stash;	127	static HV *coro_state_stash, *coro_stash;
85	static SV *coro_mortal; /* will be freed after next transfer */	128	static SV *coro_mortal; /* will be freed after next transfer */
86		129
		130	static struct coro_cctx *cctx_first;
		131	static int cctx_count, cctx_idle;
		132
87	/* this is a structure representing a c-level coroutine */	133	/* this is a structure representing a c-level coroutine */
88	typedef struct coro_stack {	134	typedef struct coro_cctx {
89	struct coro_stack *next;	135	struct coro_cctx *next;
90		136
91	/* the stack */	137	/* the stack */
92	void *sptr;	138	void *sptr;
93	long ssize; /* positive == mmap, otherwise malloc */	139	long ssize; /* positive == mmap, otherwise malloc */
94		140
95	/* cpu state */	141	/* cpu state */
96	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	142	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
97	JMPENV *top_env;	143	JMPENV *top_env;
98	coro_context cctx;	144	coro_context cctx;
99	} coro_stack;	145
		146	int inuse;
		147
		148	#if USE_VALGRIND
		149	int valgrind_id;
		150	#endif
		151	} coro_cctx;
		152
		153	enum {
		154	CF_RUNNING = 0x0001, /* coroutine is running */
		155	CF_READY = 0x0002, /* coroutine is ready */
		156	CF_NEW = 0x0004, /* ahs never been switched to */
		157	};
100		158
101	/* this is a structure representing a perl-level coroutine */	159	/* this is a structure representing a perl-level coroutine */
102	struct coro {	160	struct coro {
103	/* the c coroutine allocated to this perl coroutine, if any */	161	/* the c coroutine allocated to this perl coroutine, if any */
104	coro_stack *stack;	162	coro_cctx *cctx;
105		163
106	/* data associated with this coroutine (initial args) */	164	/* data associated with this coroutine (initial args) */
107	AV *args;	165	AV *args;
108	int refcnt;	166	int refcnt;
		167	int save; /* CORO_SAVE flags */
		168	int flags; /* CF_ flags */
109		169
110	/* optionally saved, might be zero */	170	/* optionally saved, might be zero */
111	AV *defav;	171	AV *defav; /* @_ */
112	SV *defsv;	172	SV *defsv; /* $_ */
113	SV *errsv;	173	SV *errsv; /* $@ */
		174	SV *irssv; /* $/ */
		175	SV *irssv_sv; /* real $/ cache */
114		176
115	/* saved global state not related to stacks */	177	#define VAR(name,type) type name;
116	U8 dowarn;	178	# include "state.h"
117	I32 in_eval;	179	#undef VAR
118
119	/* the stacks and related info (callchain etc..) */
120	PERL_SI *curstackinfo;
121	AV *curstack;
122	AV *mainstack;
123	SV **stack_sp;
124	OP *op;
125	SV **curpad;
126	AV *comppad;
127	CV *compcv;
128	SV **stack_base;
129	SV **stack_max;
130	SV **tmps_stack;
131	I32 tmps_floor;
132	I32 tmps_ix;
133	I32 tmps_max;
134	I32 *markstack;
135	I32 *markstack_ptr;
136	I32 *markstack_max;
137	I32 *scopestack;
138	I32 scopestack_ix;
139	I32 scopestack_max;
140	ANY *savestack;
141	I32 savestack_ix;
142	I32 savestack_max;
143	OP **retstack;
144	I32 retstack_ix;
145	I32 retstack_max;
146	PMOP *curpm;
147	COP *curcop;
148		180
149	/* coro process data */	181	/* coro process data */
150	int prio;	182	int prio;
151	};	183	};
152		184
…		…
159	AV *padlist = CvPADLIST (cv);	191	AV *padlist = CvPADLIST (cv);
160	AV *newpadlist, *newpad;	192	AV *newpadlist, *newpad;
161		193
162	newpadlist = newAV ();	194	newpadlist = newAV ();
163	AvREAL_off (newpadlist);	195	AvREAL_off (newpadlist);
164	#if PERL_VERSION < 9	196	#if PERL_VERSION_ATLEAST (5,9,0)
		197	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		198	#else
165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	199	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
168	#endif	200	#endif
169	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	201	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170	--AvFILLp (padlist);	202	--AvFILLp (padlist);
171		203
172	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	204	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
216		248
217	#define PERL_MAGIC_coro PERL_MAGIC_ext	249	#define PERL_MAGIC_coro PERL_MAGIC_ext
218		250
219	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	251	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
220		252
		253	#define CORO_MAGIC(cv) \
		254	SvMAGIC (cv) \
		255	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		256	? SvMAGIC (cv) \
		257	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		258	: 0
		259
221	/* the next two functions merely cache the padlists */	260	/* the next two functions merely cache the padlists */
222	static void	261	static void
223	get_padlist (CV *cv)	262	get_padlist (CV *cv)
224	{	263	{
225	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	264	MAGIC *mg = CORO_MAGIC (cv);
		265	AV *av;
226		266
227	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	267	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
228	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	268	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229	else	269	else
230	{	270	{
231	#if 0	271	#if PREFER_PERL_FUNCTIONS
232	/* this is probably cleaner, but also slower? */	272	/* this is probably cleaner, but also slower? */
233	CV *cp = Perl_cv_clone (cv);	273	CV *cp = Perl_cv_clone (cv);
234	CvPADLIST (cv) = CvPADLIST (cp);	274	CvPADLIST (cv) = CvPADLIST (cp);
235	CvPADLIST (cp) = 0;	275	CvPADLIST (cp) = 0;
236	SvREFCNT_dec (cp);	276	SvREFCNT_dec (cp);
…		…
241	}	281	}
242		282
243	static void	283	static void
244	put_padlist (CV *cv)	284	put_padlist (CV *cv)
245	{	285	{
246	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	286	MAGIC *mg = CORO_MAGIC (cv);
		287	AV *av;
247		288
248	if (!mg)	289	if (!mg)
249	{	290	{
250	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	291	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	292	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252	mg->mg_virtual = &vtbl_coro;	293	mg->mg_virtual = &vtbl_coro;
253	mg->mg_obj = (SV *)newAV ();	294	mg->mg_obj = (SV *)newAV ();
254	}	295	}
255		296
256	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	297	av = (AV *)mg->mg_obj;
		298
		299	if (AvFILLp (av) >= AvMAX (av))
		300	av_extend (av, AvMAX (av) + 1);
		301
		302	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
257	}	303	}
258		304
259	#define SB do {	305	#define SB do {
260	#define SE } while (0)	306	#define SE } while (0)
261		307
262	#define LOAD(state) load_state((state));
263	#define SAVE(state,flags) save_state((state),(flags));
264
265	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	308	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
266		309
267	static void	310	static void
268	load_state(Coro__State c)	311	load_perl (Coro__State c)
269	{	312	{
270	PL_dowarn = c->dowarn;	313	#define VAR(name,type) PL_ ## name = c->name;
271	PL_in_eval = c->in_eval;	314	# include "state.h"
272		315	#undef VAR
273	PL_curstackinfo = c->curstackinfo;
274	PL_curstack = c->curstack;
275	PL_mainstack = c->mainstack;
276	PL_stack_sp = c->stack_sp;
277	PL_op = c->op;
278	PL_curpad = c->curpad;
279	PL_comppad = c->comppad;
280	PL_compcv = c->compcv;
281	PL_stack_base = c->stack_base;
282	PL_stack_max = c->stack_max;
283	PL_tmps_stack = c->tmps_stack;
284	PL_tmps_floor = c->tmps_floor;
285	PL_tmps_ix = c->tmps_ix;
286	PL_tmps_max = c->tmps_max;
287	PL_markstack = c->markstack;
288	PL_markstack_ptr = c->markstack_ptr;
289	PL_markstack_max = c->markstack_max;
290	PL_scopestack = c->scopestack;
291	PL_scopestack_ix = c->scopestack_ix;
292	PL_scopestack_max = c->scopestack_max;
293	PL_savestack = c->savestack;
294	PL_savestack_ix = c->savestack_ix;
295	PL_savestack_max = c->savestack_max;
296	#if PERL_VERSION < 9
297	PL_retstack = c->retstack;
298	PL_retstack_ix = c->retstack_ix;
299	PL_retstack_max = c->retstack_max;
300	#endif
301	PL_curpm = c->curpm;
302	PL_curcop = c->curcop;
303		316
304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	317	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	318	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
306	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	319	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		320	if (c->irssv)
		321	{
		322	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		323	SvREFCNT_dec (c->irssv);
		324	else
		325	{
		326	REPLACE_SV (PL_rs, c->irssv);
		327	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		328	sv_setsv (c->irssv_sv, PL_rs);
		329	}
		330	}
307		331
308	{	332	{
309	dSP;	333	dSP;
310	CV *cv;	334	CV *cv;
311		335
312	/* now do the ugly restore mess */	336	/* now do the ugly restore mess */
313	while ((cv = (CV *)POPs))	337	while ((cv = (CV *)POPs))
314	{	338	{
315	AV *padlist = (AV *)POPs;
316
317	if (padlist)
318	{
319	put_padlist (cv); /* mark this padlist as available */	339	put_padlist (cv); /* mark this padlist as available */
320	CvPADLIST(cv) = padlist;	340	CvDEPTH (cv) = PTR2IV (POPs);
321	}	341	CvPADLIST (cv) = (AV *)POPs;
322
323	++CvDEPTH(cv);
324	}	342	}
325		343
326	PUTBACK;	344	PUTBACK;
327	}	345	}
328	}	346	}
329		347
330	static void	348	static void
331	save_state(Coro__State c, int flags)	349	save_perl (Coro__State c)
332	{	350	{
333	{	351	{
334	dSP;	352	dSP;
335	I32 cxix = cxstack_ix;	353	I32 cxix = cxstack_ix;
336	PERL_CONTEXT *ccstk = cxstack;	354	PERL_CONTEXT *ccstk = cxstack;
…		…
339	/*	357	/*
340	* the worst thing you can imagine happens first - we have to save	358	* the worst thing you can imagine happens first - we have to save
341	* (and reinitialize) all cv's in the whole callchain :(	359	* (and reinitialize) all cv's in the whole callchain :(
342	*/	360	*/
343		361
		362	EXTEND (SP, 3 + 1);
344	PUSHs (Nullsv);	363	PUSHs (Nullsv);
345	/* this loop was inspired by pp_caller */	364	/* this loop was inspired by pp_caller */
346	for (;;)	365	for (;;)
347	{	366	{
348	while (cxix >= 0)	367	while (cxix >= 0)
349	{	368	{
350	PERL_CONTEXT *cx = &ccstk[cxix--];	369	PERL_CONTEXT *cx = &ccstk[cxix--];
351		370
352	if (CxTYPE(cx) == CXt_SUB)	371	if (CxTYPE (cx) == CXt_SUB)
353	{	372	{
354	CV *cv = cx->blk_sub.cv;	373	CV *cv = cx->blk_sub.cv;
		374
355	if (CvDEPTH(cv))	375	if (CvDEPTH (cv))
356	{	376	{
357	EXTEND (SP, CvDEPTH(cv)*2);	377	EXTEND (SP, 3);
358
359	while (--CvDEPTH(cv))
360	{
361	/* this tells the restore code to increment CvDEPTH */
362	PUSHs (Nullsv);
363	PUSHs ((SV *)cv);
364	}
365
366	PUSHs ((SV *)CvPADLIST(cv));	378	PUSHs ((SV *)CvPADLIST (cv));
		379	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
367	PUSHs ((SV *)cv);	380	PUSHs ((SV *)cv);
368		381
		382	CvDEPTH (cv) = 0;
369	get_padlist (cv);	383	get_padlist (cv);
370	}	384	}
371	}	385	}
372	#ifdef CXt_FORMAT
373	else if (CxTYPE(cx) == CXt_FORMAT)
374	{
375	/* I never used formats, so how should I know how these are implemented? */
376	/* my bold guess is as a simple, plain sub... */
377	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
378	}
379	#endif
380	}	386	}
381		387
382	if (top_si->si_type == PERLSI_MAIN)	388	if (top_si->si_type == PERLSI_MAIN)
383	break;	389	break;
384		390
…		…
388	}	394	}
389		395
390	PUTBACK;	396	PUTBACK;
391	}	397	}
392		398
393	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	399	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
394	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	400	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
395	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	401	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		402	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
396		403
397	c->dowarn = PL_dowarn;	404	#define VAR(name,type)c->name = PL_ ## name;
398	c->in_eval = PL_in_eval;	405	# include "state.h"
399		406	#undef VAR
400	c->curstackinfo = PL_curstackinfo;
401	c->curstack = PL_curstack;
402	c->mainstack = PL_mainstack;
403	c->stack_sp = PL_stack_sp;
404	c->op = PL_op;
405	c->curpad = PL_curpad;
406	c->comppad = PL_comppad;
407	c->compcv = PL_compcv;
408	c->stack_base = PL_stack_base;
409	c->stack_max = PL_stack_max;
410	c->tmps_stack = PL_tmps_stack;
411	c->tmps_floor = PL_tmps_floor;
412	c->tmps_ix = PL_tmps_ix;
413	c->tmps_max = PL_tmps_max;
414	c->markstack = PL_markstack;
415	c->markstack_ptr = PL_markstack_ptr;
416	c->markstack_max = PL_markstack_max;
417	c->scopestack = PL_scopestack;
418	c->scopestack_ix = PL_scopestack_ix;
419	c->scopestack_max = PL_scopestack_max;
420	c->savestack = PL_savestack;
421	c->savestack_ix = PL_savestack_ix;
422	c->savestack_max = PL_savestack_max;
423	#if PERL_VERSION < 9
424	c->retstack = PL_retstack;
425	c->retstack_ix = PL_retstack_ix;
426	c->retstack_max = PL_retstack_max;
427	#endif
428	c->curpm = PL_curpm;
429	c->curcop = PL_curcop;
430	}	407	}
431		408
432	/*	409	/*
433	* allocate various perl stacks. This is an exact copy	410	* allocate various perl stacks. This is an exact copy
434	* of perl.c:init_stacks, except that it uses less memory	411	* of perl.c:init_stacks, except that it uses less memory
435	* on the (sometimes correct) assumption that coroutines do	412	* on the (sometimes correct) assumption that coroutines do
436	* not usually need a lot of stackspace.	413	* not usually need a lot of stackspace.
437	*/	414	*/
		415	#if PREFER_PERL_FUNCTIONS
		416	# define coro_init_stacks init_stacks
		417	#else
438	static void	418	static void
439	coro_init_stacks ()	419	coro_init_stacks ()
440	{	420	{
441	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	421	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
442	PL_curstackinfo->si_type = PERLSI_MAIN;	422	PL_curstackinfo->si_type = PERLSI_MAIN;
443	PL_curstack = PL_curstackinfo->si_stack;	423	PL_curstack = PL_curstackinfo->si_stack;
444	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	424	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
445		425
446	PL_stack_base = AvARRAY(PL_curstack);	426	PL_stack_base = AvARRAY(PL_curstack);
447	PL_stack_sp = PL_stack_base;	427	PL_stack_sp = PL_stack_base;
448	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	428	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
449		429
450	New(50,PL_tmps_stack,96,SV*);	430	New(50,PL_tmps_stack,128,SV*);
451	PL_tmps_floor = -1;	431	PL_tmps_floor = -1;
452	PL_tmps_ix = -1;	432	PL_tmps_ix = -1;
453	PL_tmps_max = 96;	433	PL_tmps_max = 128;
454		434
455	New(54,PL_markstack,16,I32);	435	New(54,PL_markstack,32,I32);
456	PL_markstack_ptr = PL_markstack;	436	PL_markstack_ptr = PL_markstack;
457	PL_markstack_max = PL_markstack + 16;	437	PL_markstack_max = PL_markstack + 32;
458		438
459	#ifdef SET_MARK_OFFSET	439	#ifdef SET_MARK_OFFSET
460	SET_MARK_OFFSET;	440	SET_MARK_OFFSET;
461	#endif	441	#endif
462		442
463	New(54,PL_scopestack,16,I32);	443	New(54,PL_scopestack,32,I32);
464	PL_scopestack_ix = 0;	444	PL_scopestack_ix = 0;
465	PL_scopestack_max = 16;	445	PL_scopestack_max = 32;
466		446
467	New(54,PL_savestack,96,ANY);	447	New(54,PL_savestack,64,ANY);
468	PL_savestack_ix = 0;	448	PL_savestack_ix = 0;
469	PL_savestack_max = 96;	449	PL_savestack_max = 64;
470		450
471	#if PERL_VERSION < 9	451	#if !PERL_VERSION_ATLEAST (5,9,0)
472	New(54,PL_retstack,8,OP*);	452	New(54,PL_retstack,16,OP*);
473	PL_retstack_ix = 0;	453	PL_retstack_ix = 0;
474	PL_retstack_max = 8;	454	PL_retstack_max = 16;
475	#endif	455	#endif
476	}	456	}
		457	#endif
477		458
478	/*	459	/*
479	* destroy the stacks, the callchain etc...	460	* destroy the stacks, the callchain etc...
480	*/	461	*/
481	static void	462	static void
482	destroy_stacks()	463	coro_destroy_stacks ()
483	{	464	{
484	if (!IN_DESTRUCT)	465	if (!IN_DESTRUCT)
485	{	466	{
486	/* is this ugly, I ask? */	467	/* restore all saved variables and stuff */
487	LEAVE_SCOPE (0);	468	LEAVE_SCOPE (0);
		469	assert (PL_tmps_floor == -1);
488		470
489	/* sure it is, but more important: is it correct?? :/ */	471	/* free all temporaries */
490	FREETMPS;	472	FREETMPS;
		473	assert (PL_tmps_ix == -1);
491		474
492	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	475	POPSTACK_TO (PL_mainstack);
493	}	476	}
494		477
495	while (PL_curstackinfo->si_next)	478	while (PL_curstackinfo->si_next)
496	PL_curstackinfo = PL_curstackinfo->si_next;	479	PL_curstackinfo = PL_curstackinfo->si_next;
497		480
498	while (PL_curstackinfo)	481	while (PL_curstackinfo)
499	{	482	{
500	PERL_SI *p = PL_curstackinfo->si_prev;	483	PERL_SI *p = PL_curstackinfo->si_prev;
501		484
502	{ /*D*//*remove*/
503	dSP;
504	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
505	PUTBACK; /* possibly superfluous */
506	}
507
508	if (!IN_DESTRUCT)	485	if (!IN_DESTRUCT)
509	{
510	dounwind (-1);/*D*//*remove*/
511	SvREFCNT_dec (PL_curstackinfo->si_stack);	486	SvREFCNT_dec (PL_curstackinfo->si_stack);
512	}
513		487
514	Safefree (PL_curstackinfo->si_cxstack);	488	Safefree (PL_curstackinfo->si_cxstack);
515	Safefree (PL_curstackinfo);	489	Safefree (PL_curstackinfo);
516	PL_curstackinfo = p;	490	PL_curstackinfo = p;
517	}	491	}
518		492
519	Safefree (PL_tmps_stack);	493	Safefree (PL_tmps_stack);
520	Safefree (PL_markstack);	494	Safefree (PL_markstack);
521	Safefree (PL_scopestack);	495	Safefree (PL_scopestack);
522	Safefree (PL_savestack);	496	Safefree (PL_savestack);
523	#if PERL_VERSION < 9	497	#if !PERL_VERSION_ATLEAST (5,9,0)
524	Safefree (PL_retstack);	498	Safefree (PL_retstack);
525	#endif	499	#endif
526	}	500	}
527		501
528	static void	502	static void
529	setup_coro (struct coro *coro)	503	setup_coro (struct coro *coro)
530	{	504	{
531	/*	505	/*
532	* emulate part of the perl startup here.	506	* emulate part of the perl startup here.
533	*/	507	*/
534	dTHX;	508
		509	coro_init_stacks ();
		510
		511	PL_curcop = &PL_compiling;
		512	PL_in_eval = EVAL_NULL;
		513	PL_curpm = 0;
		514	PL_localizing = 0;
		515	PL_dirty = 0;
		516	PL_restartop = 0;
		517
		518	{
		519	dSP;
		520	LOGOP myop;
		521
		522	SvREFCNT_dec (GvAV (PL_defgv));
		523	GvAV (PL_defgv) = coro->args; coro->args = 0;
		524
		525	Zero (&myop, 1, LOGOP);
		526	myop.op_next = Nullop;
		527	myop.op_flags = OPf_WANT_VOID;
		528
		529	PUSHMARK (SP);
		530	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		531	PUTBACK;
		532	PL_op = (OP *)&myop;
		533	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		534	SPAGAIN;
		535	}
		536
		537	ENTER; /* necessary e.g. for dounwind */
		538	}
		539
		540	static void
		541	free_coro_mortal ()
		542	{
		543	if (coro_mortal)
		544	{
		545	SvREFCNT_dec (coro_mortal);
		546	coro_mortal = 0;
		547	}
		548	}
		549
		550	/* inject a fake call to Coro::State::_cctx_init into the execution */
		551	static void NOINLINE
		552	prepare_cctx (coro_cctx *cctx)
		553	{
535	dSP;	554	dSP;
536	UNOP myop;	555	LOGOP myop;
537	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
538		556
539	coro_init_stacks ();
540	/*PL_curcop = 0;*/
541	/*PL_in_eval = PL_in_eval;*/ /* inherit */
542	SvREFCNT_dec (GvAV (PL_defgv));
543	GvAV (PL_defgv) = coro->args; coro->args = 0;
544
545	SPAGAIN;
546
547	Zero (&myop, 1, UNOP);	557	Zero (&myop, 1, LOGOP);
548	myop.op_next = Nullop;	558	myop.op_next = PL_op;
549	myop.op_flags = OPf_WANT_VOID;	559	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
550		560
		561	PUSHMARK (SP);
		562	EXTEND (SP, 2);
		563	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		564	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		565	PUTBACK;
551	PL_op = (OP *)&myop;	566	PL_op = (OP *)&myop;
552
553	PUSHMARK(SP);
554	XPUSHs (sub_init);
555	PUTBACK;
556	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
557	SPAGAIN;	568	SPAGAIN;
558
559	ENTER; /* necessary e.g. for dounwind */
560	}
561
562	static void
563	free_coro_mortal ()
564	{
565	if (coro_mortal)
566	{
567	SvREFCNT_dec (coro_mortal);
568	coro_mortal = 0;
569	}
570	}
571
572	static void
573	prepare_cctx (coro_stack *cctx)
574	{
575	dSP;
576	UNOP myop;
577
578	Zero (&myop, 1, UNOP);
579	myop.op_next = PL_op;
580	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
581
582	PUSHMARK(SP);
583	EXTEND (SP, 2);
584	PUSHs (newSViv (PTR2IV (cctx)));
585	PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
586	PUTBACK;
587	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
588	SPAGAIN;
589	}	569	}
590		570
591	static void	571	static void
592	coro_run (void *arg)	572	coro_run (void *arg)
593	{	573	{
		574	/* coro_run is the alternative tail of transfer(), so unlock here. */
		575	UNLOCK;
		576
594	/*	577	/*
595	* this is a _very_ stripped down perl interpreter ;)	578	* this is a _very_ stripped down perl interpreter ;)
596	*/	579	*/
597	UNLOCK;
598
599	PL_top_env = &PL_start_env;	580	PL_top_env = &PL_start_env;
		581
		582	/* inject call to cctx_init */
600	prepare_cctx ((coro_stack *)arg);	583	prepare_cctx ((coro_cctx *)arg);
601		584
602	/* somebody will hit me for both perl_run and PL_restartop */	585	/* somebody will hit me for both perl_run and PL_restartop */
603	perl_run (PERL_GET_CONTEXT);	586	PL_restartop = PL_op;
		587	perl_run (PL_curinterp);
604		588
605	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);	589	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
606	abort ();	590	abort ();
607	}	591	}
608		592
609	static coro_stack *	593	static coro_cctx *
610	stack_new ()	594	cctx_new ()
611	{	595	{
612	coro_stack *stack;	596	coro_cctx *cctx;
613		597
		598	++cctx_count;
		599
614	New (0, stack, 1, coro_stack);	600	Newz (0, cctx, 1, coro_cctx);
615		601
616	#if HAVE_MMAP	602	#if HAVE_MMAP
617		603
618	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	604	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
619	/* mmap suppsedly does allocate-on-write for us */	605	/* mmap supposedly does allocate-on-write for us */
620	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	606	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
621		607
622	if (stack->sptr == (void *)-1)	608	if (cctx->sptr == (void *)-1)
623	{	609	{
624	perror ("FATAL: unable to mmap stack for coroutine");	610	perror ("FATAL: unable to mmap stack for coroutine");
625	_exit (EXIT_FAILURE);	611	_exit (EXIT_FAILURE);
626	}	612	}
627		613
628	# if STACKGUARD	614	# if STACKGUARD
629	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	615	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
630	# endif	616	# endif
631		617
632	#else	618	#else
633		619
634	stack->ssize = STACKSIZE * (long)sizeof (long);	620	cctx->ssize = STACKSIZE * (long)sizeof (long);
635	New (0, stack->sptr, STACKSIZE, long);	621	New (0, cctx->sptr, STACKSIZE, long);
636		622
637	if (!stack->sptr)	623	if (!cctx->sptr)
638	{	624	{
639	perror (stderr, "FATAL: unable to malloc stack for coroutine");	625	perror ("FATAL: unable to malloc stack for coroutine");
640	_exit (EXIT_FAILURE);	626	_exit (EXIT_FAILURE);
641	}	627	}
642		628
643	#endif	629	#endif
644		630
		631	#if USE_VALGRIND
		632	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		633	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		634	cctx->ssize + (char *)cctx->sptr
		635	);
		636	#endif
		637
645	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	638	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
646		639
647	return stack;	640	return cctx;
648	}	641	}
649		642
650	static void	643	static void
651	stack_free (coro_stack *stack)	644	cctx_destroy (coro_cctx *cctx)
652	{	645	{
653	if (!stack)	646	if (!cctx)
654	return;	647	return;
655		648
		649	--cctx_count;
		650
		651	#if USE_VALGRIND
		652	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		653	#endif
		654
656	#if HAVE_MMAP	655	#if HAVE_MMAP
657	munmap (stack->sptr, stack->ssize);	656	munmap (cctx->sptr, cctx->ssize);
658	#else	657	#else
659	Safefree (stack->sptr);	658	Safefree (cctx->sptr);
660	#endif	659	#endif
661		660
662	Safefree (stack);	661	Safefree (cctx);
663	}	662	}
664		663
665	static coro_stack *stack_first;
666
667	static coro_stack *	664	static coro_cctx *
668	stack_get ()	665	cctx_get ()
669	{	666	{
670	coro_stack *stack;	667	coro_cctx *cctx;
671		668
672	if (stack_first)	669	if (cctx_first)
673	{	670	{
674	stack = stack_first;	671	cctx = cctx_first;
675	stack_first = stack->next;	672	cctx_first = cctx->next;
		673	--cctx_idle;
676	}	674	}
677	else	675	else
678	{	676	{
679	stack = stack_new ();	677	cctx = cctx_new ();
680	PL_op = PL_op->op_next;	678	PL_op = PL_op->op_next;
681	}	679	}
682		680
683	return stack;	681	return cctx;
684	}	682	}
685		683
686	static void	684	static void
687	stack_put (coro_stack *stack)	685	cctx_put (coro_cctx *cctx)
688	{	686	{
689	stack->next = stack_first;	687	/* free another cctx if overlimit */
690	stack_first = stack;	688	if (cctx_idle >= MAX_IDLE_CCTX)
		689	{
		690	coro_cctx *first = cctx_first;
		691	cctx_first = first->next;
		692	--cctx_idle;
		693
		694	assert (!first->inuse);
		695	cctx_destroy (first);
		696	}
		697
		698	++cctx_idle;
		699	cctx->next = cctx_first;
		700	cctx_first = cctx;
691	}	701	}
692		702
693	/* never call directly, always through the coro_state_transfer global variable */	703	/* never call directly, always through the coro_state_transfer global variable */
694	static void	704	static void NOINLINE
695	transfer_impl (struct coro *prev, struct coro *next, int flags)	705	transfer (struct coro *prev, struct coro *next)
696	{	706	{
697	dSTACKLEVEL;	707	dSTACKLEVEL;
698		708
699	/* sometimes transfer is only called to set idle_sp */	709	/* sometimes transfer is only called to set idle_sp */
700	if (flags == TRANSFER_SET_STACKLEVEL)	710	if (!next)
		711	{
701	((coro_stack *)prev)->idle_sp = STACKLEVEL;	712	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		713	assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */
		714	}
702	else if (prev != next)	715	else if (prev != next)
703	{	716	{
704	coro_stack *prev__stack;	717	coro_cctx *prev__cctx;
		718
		719	if (prev->flags & CF_NEW)
		720	{
		721	/* create a new empty context */
		722	Newz (0, prev->cctx, 1, coro_cctx);
		723	prev->cctx->inuse = 1;
		724	prev->flags &= ~CF_NEW;
		725	prev->flags |= CF_RUNNING;
		726	}
		727
		728	/*TODO: must not croak here */
		729	if (!prev->flags & CF_RUNNING)
		730	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		731
		732	if (next->flags & CF_RUNNING)
		733	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		734
		735	prev->flags &= ~CF_RUNNING;
		736	next->flags |= CF_RUNNING;
705		737
706	LOCK;	738	LOCK;
707		739
708	if (next->mainstack)	740	if (next->flags & CF_NEW)
709	{	741	{
710	/* coroutine already started */	742	/* need to start coroutine */
711	SAVE (prev, flags);	743	next->flags &= ~CF_NEW;
712	LOAD (next);	744	/* first get rid of the old state */
		745	save_perl (prev);
		746	/* setup coroutine call */
		747	setup_coro (next);
		748	/* need a new stack */
		749	assert (!next->cctx);
713	}	750	}
714	else	751	else
715	{	752	{
716	/* need to start coroutine */	753	/* coroutine already started */
717	/* first get rid of the old state */	754	save_perl (prev);
718	SAVE (prev, -1);	755	load_perl (next);
719	/* setup coroutine call */
720	setup_coro (next);
721	/* need a stack */
722	next->stack = 0;
723	}	756	}
724		757
725	if (!prev->stack)
726	/* create a new empty context */
727	Newz (0, prev->stack, 1, coro_stack);
728
729	prev__stack = prev->stack;	758	prev__cctx = prev->cctx;
730		759
731	/* possibly "free" the stack */	760	/* possibly "free" the cctx */
732	if (prev__stack->idle_sp == STACKLEVEL)	761	if (prev__cctx->idle_sp == STACKLEVEL)
733	{	762	{
734	stack_put (prev__stack);	763	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		764	assert (PL_top_env == prev__cctx->top_env);
		765
735	prev->stack = 0;	766	prev->cctx = 0;
		767
		768	cctx_put (prev__cctx);
		769	prev__cctx->inuse = 0;
736	}	770	}
737		771
738	if (!next->stack)	772	if (!next->cctx)
739	next->stack = stack_get ();
740
741	if (prev__stack != next->stack)
742	{	773	{
743	prev__stack->top_env = PL_top_env;	774	next->cctx = cctx_get ();
744	PL_top_env = next->stack->top_env;	775	assert (!next->cctx->inuse);
745	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	776	next->cctx->inuse = 1;
746	}	777	}
747		778
		779	if (prev__cctx != next->cctx)
		780	{
		781	prev__cctx->top_env = PL_top_env;
		782	PL_top_env = next->cctx->top_env;
		783	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		784	}
		785
748	free_coro_mortal ();	786	free_coro_mortal ();
749		787
750	UNLOCK;	788	UNLOCK;
751	}	789	}
752	}	790	}
753		791
754	/* use this function pointer to call the above function */
755	/* this is done to increase chances of the compiler not inlining the call */
756	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
757	void (*coro_state_transfer)(struct coro *prev, struct coro *next, int flags) = transfer_impl;
758
759	struct transfer_args	792	struct transfer_args
760	{	793	{
761	struct coro *prev, *next;	794	struct coro *prev, *next;
762	int flags;
763	};	795	};
764		796
765	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	797	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
766		798
767	static void	799	static void
768	coro_state_destroy (struct coro *coro)	800	coro_state_destroy (struct coro *coro)
769	{	801	{
770	if (coro->refcnt--)	802	if (coro->refcnt--)
771	return;	803	return;
772		804
773	if (coro->mainstack && coro->mainstack != main_mainstack)	805	if (coro->mainstack && coro->mainstack != main_mainstack)
774	{	806	{
775	struct coro temp;	807	struct coro temp;
		808	Zero (&temp, 1, struct coro);
		809	temp.save = CORO_SAVE_ALL;
776		810
777	SAVE ((&temp), TRANSFER_SAVE_ALL);	811	if (coro->flags & CF_RUNNING)
778	LOAD (coro);	812	croak ("FATAL: tried to destroy currently running coroutine");
779		813
		814	save_perl (&temp);
		815	load_perl (coro);
		816
780	destroy_stacks ();	817	coro_destroy_stacks ();
781		818
782	LOAD ((&temp)); /* this will get rid of defsv etc.. */	819	load_perl (&temp); /* this will get rid of defsv etc.. */
783		820
784	coro->mainstack = 0;	821	coro->mainstack = 0;
785	}	822	}
786		823
787	stack_free (coro->stack);	824	cctx_destroy (coro->cctx);
788	SvREFCNT_dec (coro->args);	825	SvREFCNT_dec (coro->args);
789	Safefree (coro);	826	Safefree (coro);
790	}	827	}
791		828
792	static int	829	static int
…		…
808	++coro->refcnt;	845	++coro->refcnt;
809		846
810	return 0;	847	return 0;
811	}	848	}
812		849
813	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	850	static MGVTBL coro_state_vtbl = {
		851	0, 0, 0, 0,
		852	coro_state_clear,
		853	0,
		854	#ifdef MGf_DUP
		855	coro_state_dup,
		856	#else
		857	# define MGf_DUP 0
		858	#endif
		859	};
814		860
815	static struct coro *	861	static struct coro *
816	SvSTATE (SV *coro)	862	SvSTATE (SV *coro)
817	{	863	{
818	HV *stash;	864	HV *stash;
…		…
833	assert (mg->mg_type == PERL_MAGIC_ext);	879	assert (mg->mg_type == PERL_MAGIC_ext);
834	return (struct coro *)mg->mg_ptr;	880	return (struct coro *)mg->mg_ptr;
835	}	881	}
836		882
837	static void	883	static void
838	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	884	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
839	{	885	{
840	ta->prev = SvSTATE (prev);	886	ta->prev = SvSTATE (prev_sv);
841	ta->next = SvSTATE (next);	887	ta->next = SvSTATE (next_sv);
842	ta->flags = flags;
843	}	888	}
844		889
845	static void	890	static void
846	api_transfer (SV *prev, SV *next, int flags)	891	api_transfer (SV *prev_sv, SV *next_sv)
847	{	892	{
848	dTHX;
849	struct transfer_args ta;	893	struct transfer_args ta;
850		894
851	prepare_transfer (&ta, prev, next, flags);	895	prepare_transfer (&ta, prev_sv, next_sv);
852	TRANSFER (ta);	896	TRANSFER (ta);
		897	}
		898
		899	static int
		900	api_save (SV *coro_sv, int new_save)
		901	{
		902	struct coro *coro = SvSTATE (coro_sv);
		903	int old_save = coro->save;
		904
		905	if (new_save >= 0)
		906	coro->save = new_save;
		907
		908	return old_save;
853	}	909	}
854		910
855	/** Coro ********************************************************************/	911	/** Coro ********************************************************************/
856		912
857	#define PRIO_MAX 3	913	#define PRIO_MAX 3
…		…
860	#define PRIO_LOW -1	916	#define PRIO_LOW -1
861	#define PRIO_IDLE -3	917	#define PRIO_IDLE -3
862	#define PRIO_MIN -4	918	#define PRIO_MIN -4
863		919
864	/* for Coro.pm */	920	/* for Coro.pm */
865	static GV *coro_current, *coro_idle;	921	static SV *coro_current;
866	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	922	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
867	static int coro_nready;	923	static int coro_nready;
868		924
869	static void	925	static void
870	coro_enq (SV *sv)	926	coro_enq (SV *coro_sv)
871	{	927	{
872	int prio;
873
874	if (SvTYPE (sv) != SVt_PVHV)
875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
876
877	prio = SvSTATE (sv)->prio;
878
879	av_push (coro_ready [prio - PRIO_MIN], sv);	928	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
880	coro_nready++;	929	coro_nready++;
881	}	930	}
882		931
883	static SV *	932	static SV *
884	coro_deq (int min_prio)	933	coro_deq (int min_prio)
…		…
897	}	946	}
898		947
899	return 0;	948	return 0;
900	}	949	}
901		950
902	static void	951	static int
903	api_ready (SV *coro)	952	api_ready (SV *coro_sv)
904	{	953	{
905	dTHX;	954	struct coro *coro;
906		955
907	if (SvROK (coro))	956	if (SvROK (coro_sv))
908	coro = SvRV (coro);	957	coro_sv = SvRV (coro_sv);
		958
		959	coro = SvSTATE (coro_sv);
		960
		961	if (coro->flags & CF_READY)
		962	return 0;
		963
		964	coro->flags |= CF_READY;
909		965
910	LOCK;	966	LOCK;
911	coro_enq (SvREFCNT_inc (coro));	967	coro_enq (SvREFCNT_inc (coro_sv));
912	UNLOCK;	968	UNLOCK;
		969
		970	return 1;
		971	}
		972
		973	static int
		974	api_is_ready (SV *coro_sv)
		975	{
		976	return !!(SvSTATE (coro_sv)->flags & CF_READY);
913	}	977	}
914		978
915	static void	979	static void
916	prepare_schedule (struct transfer_args *ta)	980	prepare_schedule (struct transfer_args *ta)
917	{	981	{
918	SV *current, *prev, *next;	982	SV *prev, *next;
919
920	current = GvSV (coro_current);
921		983
922	for (;;)	984	for (;;)
923	{	985	{
924	LOCK;	986	LOCK;
925	next = coro_deq (PRIO_MIN);	987	next = coro_deq (PRIO_MIN);
…		…
934	ENTER;	996	ENTER;
935	SAVETMPS;	997	SAVETMPS;
936		998
937	PUSHMARK (SP);	999	PUSHMARK (SP);
938	PUTBACK;	1000	PUTBACK;
939	call_sv (GvSV (coro_idle), G_DISCARD);	1001	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
940		1002
941	FREETMPS;	1003	FREETMPS;
942	LEAVE;	1004	LEAVE;
943	}	1005	}
944	}	1006	}
945		1007
946	prev = SvRV (current);	1008	prev = SvRV (coro_current);
947	SvRV (current) = next;	1009	SvRV_set (coro_current, next);
948		1010
949	/* free this only after the transfer */	1011	/* free this only after the transfer */
950	LOCK;	1012	LOCK;
951	free_coro_mortal ();	1013	free_coro_mortal ();
952	UNLOCK;	1014	UNLOCK;
953	coro_mortal = prev;	1015	coro_mortal = prev;
954		1016
		1017	assert (!SvROK(prev));//D
		1018	assert (!SvROK(next));//D
		1019
955	ta->prev = SvSTATE (prev);	1020	ta->prev = SvSTATE (prev);
956	ta->next = SvSTATE (next);	1021	ta->next = SvSTATE (next);
957	ta->flags = TRANSFER_SAVE_ALL;	1022
		1023	assert (ta->next->flags & CF_READY);
		1024	ta->next->flags &= ~CF_READY;
958	}	1025	}
959		1026
960	static void	1027	static void
961	prepare_cede (struct transfer_args *ta)	1028	prepare_cede (struct transfer_args *ta)
962	{	1029	{
963	LOCK;	1030	api_ready (coro_current);
964	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
965	UNLOCK;
966
967	prepare_schedule (ta);	1031	prepare_schedule (ta);
968	}	1032	}
969		1033
		1034	static int
		1035	prepare_cede_notself (struct transfer_args *ta)
		1036	{
		1037	if (coro_nready)
		1038	{
		1039	SV *prev = SvRV (coro_current);
		1040	prepare_schedule (ta);
		1041	api_ready (prev);
		1042	return 1;
		1043	}
		1044	else
		1045	return 0;
		1046	}
		1047
970	static void	1048	static void
971	api_schedule (void)	1049	api_schedule (void)
972	{	1050	{
973	dTHX;
974	struct transfer_args ta;	1051	struct transfer_args ta;
975		1052
976	prepare_schedule (&ta);	1053	prepare_schedule (&ta);
977	TRANSFER (ta);	1054	TRANSFER (ta);
978	}	1055	}
979		1056
980	static void	1057	static int
981	api_cede (void)	1058	api_cede (void)
982	{	1059	{
983	dTHX;
984	struct transfer_args ta;	1060	struct transfer_args ta;
985		1061
986	prepare_cede (&ta);	1062	prepare_cede (&ta);
		1063
		1064	if (ta.prev != ta.next)
		1065	{
987	TRANSFER (ta);	1066	TRANSFER (ta);
		1067	return 1;
		1068	}
		1069	else
		1070	return 0;
		1071	}
		1072
		1073	static int
		1074	api_cede_notself (void)
		1075	{
		1076	struct transfer_args ta;
		1077
		1078	if (prepare_cede_notself (&ta))
		1079	{
		1080	TRANSFER (ta);
		1081	return 1;
		1082	}
		1083	else
		1084	return 0;
988	}	1085	}
989		1086
990	MODULE = Coro::State PACKAGE = Coro::State	1087	MODULE = Coro::State PACKAGE = Coro::State
991		1088
992	PROTOTYPES: DISABLE	1089	PROTOTYPES: DISABLE
…		…
998	#endif	1095	#endif
999	BOOT_PAGESIZE;	1096	BOOT_PAGESIZE;
1000		1097
1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1098	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002		1099
1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1100	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1101	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1102	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1103	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1104	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1006		1105
1007	main_mainstack = PL_mainstack;	1106	main_mainstack = PL_mainstack;
1008		1107
1009	coroapi.ver = CORO_API_VERSION;	1108	coroapi.ver = CORO_API_VERSION;
1010	coroapi.transfer = api_transfer;	1109	coroapi.transfer = api_transfer;
…		…
1020	HV *hv;	1119	HV *hv;
1021	int i;	1120	int i;
1022		1121
1023	Newz (0, coro, 1, struct coro);	1122	Newz (0, coro, 1, struct coro);
1024	coro->args = newAV ();	1123	coro->args = newAV ();
		1124	coro->save = CORO_SAVE_ALL;
		1125	coro->flags = CF_NEW;
1025		1126
1026	hv = newHV ();	1127	hv = newHV ();
1027	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1128	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1028	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1129	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029		1130
1030	for (i = 1; i < items; i++)	1131	for (i = 1; i < items; i++)
1031	av_push (coro->args, newSVsv (ST (i)));	1132	av_push (coro->args, newSVsv (ST (i)));
1032
1033	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1034	/*coro->stack = 0;*/
1035	}	1133	}
1036	OUTPUT:	1134	OUTPUT:
		1135	RETVAL
		1136
		1137	int
		1138	save (SV *coro, int new_save = -1)
		1139	CODE:
		1140	RETVAL = api_save (coro, new_save);
		1141	OUTPUT:
1037	RETVAL	1142	RETVAL
1038		1143
1039	void	1144	void
1040	_set_stacklevel (...)	1145	_set_stacklevel (...)
1041	ALIAS:	1146	ALIAS:
1042	Coro::State::transfer = 1	1147	Coro::State::transfer = 1
1043	Coro::schedule = 2	1148	Coro::schedule = 2
1044	Coro::cede = 3	1149	Coro::cede = 3
1045	Coro::Cont::yield = 4	1150	Coro::cede_notself = 4
1046	CODE:	1151	CODE:
1047	{	1152	{
1048	struct transfer_args ta;	1153	struct transfer_args ta;
1049		1154
1050	switch (ix)	1155	switch (ix)
1051	{	1156	{
1052	case 0:	1157	case 0:
1053	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1158	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1054	ta.next = 0;	1159	ta.next = 0;
1055	ta.flags = TRANSFER_SET_STACKLEVEL;
1056	break;	1160	break;
1057		1161
1058	case 1:	1162	case 1:
1059	if (items != 3)	1163	if (items != 2)
1060	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1164	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1061		1165
1062	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1166	prepare_transfer (&ta, ST (0), ST (1));
1063	break;	1167	break;
1064		1168
1065	case 2:	1169	case 2:
1066	prepare_schedule (&ta);	1170	prepare_schedule (&ta);
1067	break;	1171	break;
…		…
1069	case 3:	1173	case 3:
1070	prepare_cede (&ta);	1174	prepare_cede (&ta);
1071	break;	1175	break;
1072		1176
1073	case 4:	1177	case 4:
1074	{	1178	if (!prepare_cede_notself (&ta))
1075	SV *yieldstack;	1179	XSRETURN_EMPTY;
1076	SV *sv;
1077	AV *defav = GvAV (PL_defgv);
1078		1180
1079	yieldstack = *hv_fetch (
1080	(HV *)SvRV (GvSV (coro_current)),
1081	"yieldstack", sizeof ("yieldstack") - 1,
1082	0
1083	);
1084
1085	/* set up @_ -- ugly */
1086	av_clear (defav);
1087	av_fill (defav, items - 1);
1088	while (items--)
1089	av_store (defav, items, SvREFCNT_inc (ST(items)));
1090
1091	sv = av_pop ((AV *)SvRV (yieldstack));
1092	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1093	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1094	ta.flags = 0;
1095	SvREFCNT_dec (sv);
1096	}
1097	break;	1181	break;
1098
1099	}	1182	}
1100		1183
		1184	BARRIER;
1101	TRANSFER (ta);	1185	TRANSFER (ta);
1102	}	1186	}
1103		1187
1104	void	1188	void
1105	_clone_state_from (SV *dst, SV *src)	1189	_clone_state_from (SV *dst, SV *src)
…		…
1110	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);	1194	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1111		1195
1112	++coro_src->refcnt;	1196	++coro_src->refcnt;
1113	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;	1197	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1114	}	1198	}
1115
1116	void
1117	_nonlocal_goto (IV nextop)
1118	CODE:
1119	/* uuh, somebody will kill me again for this */
1120	PL_op->op_next = INT2PTR (OP *, nextop);
1121		1199
1122	void	1200	void
1123	_exit (code)	1201	_exit (code)
1124	int code	1202	int code
1125	PROTOTYPE: $	1203	PROTOTYPE: $
1126	CODE:	1204	CODE:
1127	_exit (code);	1205	_exit (code);
1128		1206
		1207	int
		1208	cctx_count ()
		1209	CODE:
		1210	RETVAL = cctx_count;
		1211	OUTPUT:
		1212	RETVAL
		1213
		1214	int
		1215	cctx_idle ()
		1216	CODE:
		1217	RETVAL = cctx_idle;
		1218	OUTPUT:
		1219	RETVAL
		1220
1129	MODULE = Coro::State PACKAGE = Coro	1221	MODULE = Coro::State PACKAGE = Coro
1130		1222
1131	BOOT:	1223	BOOT:
1132	{	1224	{
1133	int i;	1225	int i;
…		…
1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1231	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1232	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1233	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1234	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143		1235
1144	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1236	coro_current = get_sv ("Coro::current", FALSE);
1145	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1237	SvREADONLY_on (coro_current);
1146		1238
1147	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1239	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148	coro_ready[i] = newAV ();	1240	coro_ready[i] = newAV ();
1149		1241
1150	{	1242	{
1151	SV *sv = perl_get_sv("Coro::API", 1);	1243	SV *sv = perl_get_sv("Coro::API", 1);
1152		1244
1153	coroapi.schedule = api_schedule;	1245	coroapi.schedule = api_schedule;
		1246	coroapi.save = api_save;
1154	coroapi.cede = api_cede;	1247	coroapi.cede = api_cede;
		1248	coroapi.cede_notself = api_cede_notself;
1155	coroapi.ready = api_ready;	1249	coroapi.ready = api_ready;
		1250	coroapi.is_ready = api_is_ready;
1156	coroapi.nready = &coro_nready;	1251	coroapi.nready = &coro_nready;
1157	coroapi.current = coro_current;	1252	coroapi.current = coro_current;
1158		1253
1159	GCoroAPI = &coroapi;	1254	GCoroAPI = &coroapi;
1160	sv_setiv (sv, (IV)&coroapi);	1255	sv_setiv (sv, (IV)&coroapi);
1161	SvREADONLY_on (sv);	1256	SvREADONLY_on (sv);
1162	}	1257	}
1163	}	1258	}
		1259
		1260	void
		1261	_set_current (SV *current)
		1262	PROTOTYPE: $
		1263	CODE:
		1264	SvREFCNT_dec (SvRV (coro_current));
		1265	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1164		1266
1165	int	1267	int
1166	prio (Coro::State coro, int newprio = 0)	1268	prio (Coro::State coro, int newprio = 0)
1167	ALIAS:	1269	ALIAS:
1168	nice = 1	1270	nice = 1
…		…
1171	RETVAL = coro->prio;	1273	RETVAL = coro->prio;
1172		1274
1173	if (items > 1)	1275	if (items > 1)
1174	{	1276	{
1175	if (ix)	1277	if (ix)
1176	newprio += coro->prio;	1278	newprio = coro->prio - newprio;
1177		1279
1178	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1280	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1179	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1281	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1180		1282
1181	coro->prio = newprio;	1283	coro->prio = newprio;
1182	}	1284	}
1183	}	1285	}
		1286	OUTPUT:
		1287	RETVAL
1184		1288
1185	void	1289	SV *
1186	ready (SV *self)	1290	ready (SV *self)
1187	PROTOTYPE: $	1291	PROTOTYPE: $
1188	CODE:	1292	CODE:
1189	api_ready (self);	1293	RETVAL = boolSV (api_ready (self));
		1294	OUTPUT:
		1295	RETVAL
		1296
		1297	SV *
		1298	is_ready (SV *self)
		1299	PROTOTYPE: $
		1300	CODE:
		1301	RETVAL = boolSV (api_is_ready (self));
		1302	OUTPUT:
		1303	RETVAL
1190		1304
1191	int	1305	int
1192	nready (...)	1306	nready (...)
1193	PROTOTYPE:	1307	PROTOTYPE:
1194	CODE:	1308	CODE:
…		…
1200		1314
1201	SV *	1315	SV *
1202	_get_state ()	1316	_get_state ()
1203	CODE:	1317	CODE:
1204	{	1318	{
1205	struct {	1319	struct io_state *data;
1206	int errorno;
1207	int laststype;
1208	int laststatval;
1209	Stat_t statcache;
1210	} data;
1211		1320
		1321	RETVAL = newSV (sizeof (struct io_state));
		1322	data = (struct io_state *)SvPVX (RETVAL);
		1323	SvCUR_set (RETVAL, sizeof (struct io_state));
		1324	SvPOK_only (RETVAL);
		1325
1212	data.errorno = errno;	1326	data->errorno = errno;
1213	data.laststype = PL_laststype;	1327	data->laststype = PL_laststype;
1214	data.laststatval = PL_laststatval;	1328	data->laststatval = PL_laststatval;
1215	data.statcache = PL_statcache;	1329	data->statcache = PL_statcache;
1216
1217	RETVAL = newSVpvn ((char *)&data, sizeof data);
1218	}	1330	}
1219	OUTPUT:	1331	OUTPUT:
1220	RETVAL	1332	RETVAL
1221		1333
1222	void	1334	void
1223	_set_state (char *data_)	1335	_set_state (char *data_)
1224	PROTOTYPE: $	1336	PROTOTYPE: $
1225	CODE:	1337	CODE:
1226	{	1338	{
1227	struct {	1339	struct io_state *data = (void *)data_;
1228	int errorno;
1229	int laststype;
1230	int laststatval;
1231	Stat_t statcache;
1232	} *data = (void *)data_;
1233		1340
1234	errno = data->errorno;	1341	errno = data->errorno;
1235	PL_laststype = data->laststype;	1342	PL_laststype = data->laststype;
1236	PL_laststatval = data->laststatval;	1343	PL_laststatval = data->laststatval;
1237	PL_statcache = data->statcache;	1344	PL_statcache = data->statcache;
1238	}	1345	}
		1346

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