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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 1.128 by root, Fri Dec 22 04:22:28 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	#else
		99	# define attribute(x)
		100	#endif
		101
		102	#define NOINLINE attribute ((noinline))
		103
69	#include "CoroAPI.h"	104	#include "CoroAPI.h"
70
71	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
72		105
73	#ifdef USE_ITHREADS	106	#ifdef USE_ITHREADS
74	static perl_mutex coro_mutex;	107	static perl_mutex coro_mutex;
75	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	108	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
76	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	109	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
77	#else	110	#else
78	# define LOCK (void)0	111	# define LOCK (void)0
79	# define UNLOCK (void)0	112	# define UNLOCK (void)0
80	#endif	113	#endif
81		114
		115	struct io_state
		116	{
		117	int errorno;
		118	I32 laststype;
		119	int laststatval;
		120	Stat_t statcache;
		121	};
		122
82	static struct CoroAPI coroapi;	123	static struct CoroAPI coroapi;
83	static AV *main_mainstack; /* used to differentiate between $main and others */	124	static AV *main_mainstack; /* used to differentiate between $main and others */
84	static HV *coro_state_stash, *coro_stash;	125	static HV *coro_state_stash, *coro_stash;
85	static SV *coro_mortal; /* will be freed after next transfer */	126	static SV *coro_mortal; /* will be freed after next transfer */
86		127
		128	static struct coro_cctx *cctx_first;
		129	static int cctx_count, cctx_idle;
		130
87	/* this is a structure representing a c-level coroutine */	131	/* this is a structure representing a c-level coroutine */
88	typedef struct coro_stack {	132	typedef struct coro_cctx {
89	struct coro_stack *next;	133	struct coro_cctx *next;
90		134
91	/* the stack */	135	/* the stack */
92	void *sptr;	136	void *sptr;
93	long ssize; /* positive == mmap, otherwise malloc */	137	long ssize; /* positive == mmap, otherwise malloc */
94		138
95	/* cpu state */	139	/* cpu state */
96	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	140	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
97	JMPENV *top_env;	141	JMPENV *top_env;
98	coro_context cctx;	142	coro_context cctx;
99	} coro_stack;	143
		144	int inuse;
		145
		146	#if USE_VALGRIND
		147	int valgrind_id;
		148	#endif
		149	} coro_cctx;
		150
		151	enum {
		152	CF_RUNNING = 0x0001, /* coroutine is running */
		153	CF_READY = 0x0002, /* coroutine is ready */
		154	CF_NEW = 0x0004, /* ahs never been switched to */
		155	};
100		156
101	/* this is a structure representing a perl-level coroutine */	157	/* this is a structure representing a perl-level coroutine */
102	struct coro {	158	struct coro {
103	/* the c coroutine allocated to this perl coroutine, if any */	159	/* the c coroutine allocated to this perl coroutine, if any */
104	coro_stack *stack;	160	coro_cctx *cctx;
105		161
106	/* data associated with this coroutine (initial args) */	162	/* data associated with this coroutine (initial args) */
107	AV *args;	163	AV *args;
108	int refcnt;	164	int refcnt;
		165	int save; /* CORO_SAVE flags */
		166	int flags; /* CF_ flags */
109		167
110	/* optionally saved, might be zero */	168	/* optionally saved, might be zero */
111	AV *defav;	169	AV *defav; /* @_ */
112	SV *defsv;	170	SV *defsv; /* $_ */
113	SV *errsv;	171	SV *errsv; /* $@ */
		172	SV *irssv; /* $/ */
		173	SV *irssv_sv; /* real $/ cache */
114		174
115	/* saved global state not related to stacks */	175	#define VAR(name,type) type name;
116	U8 dowarn;	176	# include "state.h"
117	I32 in_eval;	177	#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		178
149	/* coro process data */	179	/* coro process data */
150	int prio;	180	int prio;
151	};	181	};
152		182
…		…
159	AV *padlist = CvPADLIST (cv);	189	AV *padlist = CvPADLIST (cv);
160	AV *newpadlist, *newpad;	190	AV *newpadlist, *newpad;
161		191
162	newpadlist = newAV ();	192	newpadlist = newAV ();
163	AvREAL_off (newpadlist);	193	AvREAL_off (newpadlist);
164	#if PERL_VERSION < 9	194	#if PERL_VERSION_ATLEAST (5,9,0)
		195	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		196	#else
165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	197	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
168	#endif	198	#endif
169	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	199	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170	--AvFILLp (padlist);	200	--AvFILLp (padlist);
171		201
172	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	202	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
216		246
217	#define PERL_MAGIC_coro PERL_MAGIC_ext	247	#define PERL_MAGIC_coro PERL_MAGIC_ext
218		248
219	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	249	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
220		250
		251	#define CORO_MAGIC(cv) \
		252	SvMAGIC (cv) \
		253	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		254	? SvMAGIC (cv) \
		255	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		256	: 0
		257
221	/* the next two functions merely cache the padlists */	258	/* the next two functions merely cache the padlists */
222	static void	259	static void
223	get_padlist (CV *cv)	260	get_padlist (CV *cv)
224	{	261	{
225	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	262	MAGIC *mg = CORO_MAGIC (cv);
		263	AV *av;
226		264
227	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	265	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
228	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	266	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229	else	267	else
230	{	268	{
231	#if 0	269	#if PREFER_PERL_FUNCTIONS
232	/* this is probably cleaner, but also slower? */	270	/* this is probably cleaner, but also slower? */
233	CV *cp = Perl_cv_clone (cv);	271	CV *cp = Perl_cv_clone (cv);
234	CvPADLIST (cv) = CvPADLIST (cp);	272	CvPADLIST (cv) = CvPADLIST (cp);
235	CvPADLIST (cp) = 0;	273	CvPADLIST (cp) = 0;
236	SvREFCNT_dec (cp);	274	SvREFCNT_dec (cp);
…		…
241	}	279	}
242		280
243	static void	281	static void
244	put_padlist (CV *cv)	282	put_padlist (CV *cv)
245	{	283	{
246	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	284	MAGIC *mg = CORO_MAGIC (cv);
		285	AV *av;
247		286
248	if (!mg)	287	if (!mg)
249	{	288	{
250	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	289	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	290	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252	mg->mg_virtual = &vtbl_coro;	291	mg->mg_virtual = &vtbl_coro;
253	mg->mg_obj = (SV *)newAV ();	292	mg->mg_obj = (SV *)newAV ();
254	}	293	}
255		294
256	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	295	av = (AV *)mg->mg_obj;
		296
		297	if (AvFILLp (av) >= AvMAX (av))
		298	av_extend (av, AvMAX (av) + 1);
		299
		300	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
257	}	301	}
258		302
259	#define SB do {	303	#define SB do {
260	#define SE } while (0)	304	#define SE } while (0)
261		305
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	306	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
266		307
267	static void	308	static void
268	load_state(Coro__State c)	309	load_perl (Coro__State c)
269	{	310	{
270	PL_dowarn = c->dowarn;	311	#define VAR(name,type) PL_ ## name = c->name;
271	PL_in_eval = c->in_eval;	312	# include "state.h"
272		313	#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		314
304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	315	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	316	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
306	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	317	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		318	if (c->irssv)
		319	{
		320	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		321	SvREFCNT_dec (c->irssv);
		322	else
		323	{
		324	REPLACE_SV (PL_rs, c->irssv);
		325	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		326	sv_setsv (c->irssv_sv, PL_rs);
		327	}
		328	}
307		329
308	{	330	{
309	dSP;	331	dSP;
310	CV *cv;	332	CV *cv;
311		333
312	/* now do the ugly restore mess */	334	/* now do the ugly restore mess */
313	while ((cv = (CV *)POPs))	335	while ((cv = (CV *)POPs))
314	{	336	{
315	AV *padlist = (AV *)POPs;
316
317	if (padlist)
318	{
319	put_padlist (cv); /* mark this padlist as available */	337	put_padlist (cv); /* mark this padlist as available */
320	CvPADLIST(cv) = padlist;	338	CvDEPTH (cv) = PTR2IV (POPs);
321	}	339	CvPADLIST (cv) = (AV *)POPs;
322
323	++CvDEPTH(cv);
324	}	340	}
325		341
326	PUTBACK;	342	PUTBACK;
327	}	343	}
328	}	344	}
329		345
330	static void	346	static void
331	save_state(Coro__State c, int flags)	347	save_perl (Coro__State c)
332	{	348	{
333	{	349	{
334	dSP;	350	dSP;
335	I32 cxix = cxstack_ix;	351	I32 cxix = cxstack_ix;
336	PERL_CONTEXT *ccstk = cxstack;	352	PERL_CONTEXT *ccstk = cxstack;
…		…
339	/*	355	/*
340	* the worst thing you can imagine happens first - we have to save	356	* the worst thing you can imagine happens first - we have to save
341	* (and reinitialize) all cv's in the whole callchain :(	357	* (and reinitialize) all cv's in the whole callchain :(
342	*/	358	*/
343		359
		360	EXTEND (SP, 3 + 1);
344	PUSHs (Nullsv);	361	PUSHs (Nullsv);
345	/* this loop was inspired by pp_caller */	362	/* this loop was inspired by pp_caller */
346	for (;;)	363	for (;;)
347	{	364	{
348	while (cxix >= 0)	365	while (cxix >= 0)
349	{	366	{
350	PERL_CONTEXT *cx = &ccstk[cxix--];	367	PERL_CONTEXT *cx = &ccstk[cxix--];
351		368
352	if (CxTYPE(cx) == CXt_SUB)	369	if (CxTYPE (cx) == CXt_SUB)
353	{	370	{
354	CV *cv = cx->blk_sub.cv;	371	CV *cv = cx->blk_sub.cv;
		372
355	if (CvDEPTH(cv))	373	if (CvDEPTH (cv))
356	{	374	{
357	EXTEND (SP, CvDEPTH(cv)*2);	375	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));	376	PUSHs ((SV *)CvPADLIST (cv));
		377	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
367	PUSHs ((SV *)cv);	378	PUSHs ((SV *)cv);
368		379
		380	CvDEPTH (cv) = 0;
369	get_padlist (cv);	381	get_padlist (cv);
370	}	382	}
371	}	383	}
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	}	384	}
381		385
382	if (top_si->si_type == PERLSI_MAIN)	386	if (top_si->si_type == PERLSI_MAIN)
383	break;	387	break;
384		388
…		…
388	}	392	}
389		393
390	PUTBACK;	394	PUTBACK;
391	}	395	}
392		396
393	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	397	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;	398	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
395	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	399	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		400	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
396		401
397	c->dowarn = PL_dowarn;	402	#define VAR(name,type)c->name = PL_ ## name;
398	c->in_eval = PL_in_eval;	403	# include "state.h"
399		404	#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	}	405	}
431		406
432	/*	407	/*
433	* allocate various perl stacks. This is an exact copy	408	* allocate various perl stacks. This is an exact copy
434	* of perl.c:init_stacks, except that it uses less memory	409	* of perl.c:init_stacks, except that it uses less memory
435	* on the (sometimes correct) assumption that coroutines do	410	* on the (sometimes correct) assumption that coroutines do
436	* not usually need a lot of stackspace.	411	* not usually need a lot of stackspace.
437	*/	412	*/
		413	#if PREFER_PERL_FUNCTIONS
		414	# define coro_init_stacks init_stacks
		415	#else
438	static void	416	static void
439	coro_init_stacks ()	417	coro_init_stacks ()
440	{	418	{
441	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	419	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
442	PL_curstackinfo->si_type = PERLSI_MAIN;	420	PL_curstackinfo->si_type = PERLSI_MAIN;
443	PL_curstack = PL_curstackinfo->si_stack;	421	PL_curstack = PL_curstackinfo->si_stack;
444	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	422	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
445		423
446	PL_stack_base = AvARRAY(PL_curstack);	424	PL_stack_base = AvARRAY(PL_curstack);
447	PL_stack_sp = PL_stack_base;	425	PL_stack_sp = PL_stack_base;
448	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	426	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
449		427
450	New(50,PL_tmps_stack,96,SV*);	428	New(50,PL_tmps_stack,128,SV*);
451	PL_tmps_floor = -1;	429	PL_tmps_floor = -1;
452	PL_tmps_ix = -1;	430	PL_tmps_ix = -1;
453	PL_tmps_max = 96;	431	PL_tmps_max = 128;
454		432
455	New(54,PL_markstack,16,I32);	433	New(54,PL_markstack,32,I32);
456	PL_markstack_ptr = PL_markstack;	434	PL_markstack_ptr = PL_markstack;
457	PL_markstack_max = PL_markstack + 16;	435	PL_markstack_max = PL_markstack + 32;
458		436
459	#ifdef SET_MARK_OFFSET	437	#ifdef SET_MARK_OFFSET
460	SET_MARK_OFFSET;	438	SET_MARK_OFFSET;
461	#endif	439	#endif
462		440
463	New(54,PL_scopestack,16,I32);	441	New(54,PL_scopestack,32,I32);
464	PL_scopestack_ix = 0;	442	PL_scopestack_ix = 0;
465	PL_scopestack_max = 16;	443	PL_scopestack_max = 32;
466		444
467	New(54,PL_savestack,96,ANY);	445	New(54,PL_savestack,64,ANY);
468	PL_savestack_ix = 0;	446	PL_savestack_ix = 0;
469	PL_savestack_max = 96;	447	PL_savestack_max = 64;
470		448
471	#if PERL_VERSION < 9	449	#if !PERL_VERSION_ATLEAST (5,9,0)
472	New(54,PL_retstack,8,OP*);	450	New(54,PL_retstack,16,OP*);
473	PL_retstack_ix = 0;	451	PL_retstack_ix = 0;
474	PL_retstack_max = 8;	452	PL_retstack_max = 16;
475	#endif	453	#endif
476	}	454	}
		455	#endif
477		456
478	/*	457	/*
479	* destroy the stacks, the callchain etc...	458	* destroy the stacks, the callchain etc...
480	*/	459	*/
481	static void	460	static void
482	destroy_stacks()	461	coro_destroy_stacks ()
483	{	462	{
484	if (!IN_DESTRUCT)	463	if (!IN_DESTRUCT)
485	{	464	{
486	/* is this ugly, I ask? */	465	/* restore all saved variables and stuff */
487	LEAVE_SCOPE (0);	466	LEAVE_SCOPE (0);
		467	assert (PL_tmps_floor == -1);
488		468
489	/* sure it is, but more important: is it correct?? :/ */	469	/* free all temporaries */
490	FREETMPS;	470	FREETMPS;
		471	assert (PL_tmps_ix == -1);
491		472
492	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	473	POPSTACK_TO (PL_mainstack);
493	}	474	}
494		475
495	while (PL_curstackinfo->si_next)	476	while (PL_curstackinfo->si_next)
496	PL_curstackinfo = PL_curstackinfo->si_next;	477	PL_curstackinfo = PL_curstackinfo->si_next;
497		478
498	while (PL_curstackinfo)	479	while (PL_curstackinfo)
499	{	480	{
500	PERL_SI *p = PL_curstackinfo->si_prev;	481	PERL_SI *p = PL_curstackinfo->si_prev;
501		482
502	{ /*D*//*remove*/
503	dSP;
504	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
505	PUTBACK; /* possibly superfluous */
506	}
507
508	if (!IN_DESTRUCT)	483	if (!IN_DESTRUCT)
509	{
510	dounwind (-1);/*D*//*remove*/
511	SvREFCNT_dec (PL_curstackinfo->si_stack);	484	SvREFCNT_dec (PL_curstackinfo->si_stack);
512	}
513		485
514	Safefree (PL_curstackinfo->si_cxstack);	486	Safefree (PL_curstackinfo->si_cxstack);
515	Safefree (PL_curstackinfo);	487	Safefree (PL_curstackinfo);
516	PL_curstackinfo = p;	488	PL_curstackinfo = p;
517	}	489	}
518		490
519	Safefree (PL_tmps_stack);	491	Safefree (PL_tmps_stack);
520	Safefree (PL_markstack);	492	Safefree (PL_markstack);
521	Safefree (PL_scopestack);	493	Safefree (PL_scopestack);
522	Safefree (PL_savestack);	494	Safefree (PL_savestack);
523	#if PERL_VERSION < 9	495	#if !PERL_VERSION_ATLEAST (5,9,0)
524	Safefree (PL_retstack);	496	Safefree (PL_retstack);
525	#endif	497	#endif
526	}	498	}
527		499
528	static void	500	static void
529	setup_coro (struct coro *coro)	501	setup_coro (struct coro *coro)
530	{	502	{
531	/*	503	/*
532	* emulate part of the perl startup here.	504	* emulate part of the perl startup here.
533	*/	505	*/
534	dTHX;	506
		507	coro_init_stacks ();
		508
		509	PL_curcop = &PL_compiling;
		510	PL_in_eval = EVAL_NULL;
		511	PL_curpm = 0;
		512	PL_localizing = 0;
		513	PL_dirty = 0;
		514	PL_restartop = 0;
		515
		516	{
		517	dSP;
		518	LOGOP myop;
		519
		520	SvREFCNT_dec (GvAV (PL_defgv));
		521	GvAV (PL_defgv) = coro->args; coro->args = 0;
		522
		523	Zero (&myop, 1, LOGOP);
		524	myop.op_next = Nullop;
		525	myop.op_flags = OPf_WANT_VOID;
		526
		527	PUSHMARK (SP);
		528	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		529	PUTBACK;
		530	PL_op = (OP *)&myop;
		531	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		532	SPAGAIN;
		533	}
		534
		535	ENTER; /* necessary e.g. for dounwind */
		536	}
		537
		538	static void
		539	free_coro_mortal ()
		540	{
		541	if (coro_mortal)
		542	{
		543	SvREFCNT_dec (coro_mortal);
		544	coro_mortal = 0;
		545	}
		546	}
		547
		548	/* inject a fake call to Coro::State::_cctx_init into the execution */
		549	static void NOINLINE
		550	prepare_cctx (coro_cctx *cctx)
		551	{
535	dSP;	552	dSP;
536	UNOP myop;	553	LOGOP myop;
537	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
538		554
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);	555	Zero (&myop, 1, LOGOP);
548	myop.op_next = Nullop;	556	myop.op_next = PL_op;
549	myop.op_flags = OPf_WANT_VOID;	557	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
550		558
		559	PUSHMARK (SP);
		560	EXTEND (SP, 2);
		561	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		562	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		563	PUTBACK;
551	PL_op = (OP *)&myop;	564	PL_op = (OP *)&myop;
552
553	PUSHMARK(SP);
554	XPUSHs (sub_init);
555	PUTBACK;
556	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	565	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
557	SPAGAIN;	566	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	}	567	}
590		568
591	static void	569	static void
592	coro_run (void *arg)	570	coro_run (void *arg)
593	{	571	{
		572	/* coro_run is the alternative tail of transfer(), so unlock here. */
		573	UNLOCK;
		574
594	/*	575	/*
595	* this is a _very_ stripped down perl interpreter ;)	576	* this is a _very_ stripped down perl interpreter ;)
596	*/	577	*/
597	UNLOCK;
598
599	PL_top_env = &PL_start_env;	578	PL_top_env = &PL_start_env;
		579
		580	/* inject call to cctx_init */
600	prepare_cctx ((coro_stack *)arg);	581	prepare_cctx ((coro_cctx *)arg);
601		582
602	/* somebody will hit me for both perl_run and PL_restartop */	583	/* somebody will hit me for both perl_run and PL_restartop */
603	perl_run (PERL_GET_CONTEXT);	584	PL_restartop = PL_op;
		585	perl_run (PL_curinterp);
604		586
605	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);	587	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
606	abort ();	588	abort ();
607	}	589	}
608		590
609	static coro_stack *	591	static coro_cctx *
610	stack_new ()	592	cctx_new ()
611	{	593	{
612	coro_stack *stack;	594	coro_cctx *cctx;
613		595
		596	++cctx_count;
		597
614	New (0, stack, 1, coro_stack);	598	Newz (0, cctx, 1, coro_cctx);
615		599
616	#if HAVE_MMAP	600	#if HAVE_MMAP
617		601
618	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	602	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
619	/* mmap suppsedly does allocate-on-write for us */	603	/* 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);	604	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
621		605
622	if (stack->sptr == (void *)-1)	606	if (cctx->sptr == (void *)-1)
623	{	607	{
624	perror ("FATAL: unable to mmap stack for coroutine");	608	perror ("FATAL: unable to mmap stack for coroutine");
625	_exit (EXIT_FAILURE);	609	_exit (EXIT_FAILURE);
626	}	610	}
627		611
628	# if STACKGUARD	612	# if STACKGUARD
629	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	613	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
630	# endif	614	# endif
631		615
632	#else	616	#else
633		617
634	stack->ssize = STACKSIZE * (long)sizeof (long);	618	cctx->ssize = STACKSIZE * (long)sizeof (long);
635	New (0, stack->sptr, STACKSIZE, long);	619	New (0, cctx->sptr, STACKSIZE, long);
636		620
637	if (!stack->sptr)	621	if (!cctx->sptr)
638	{	622	{
639	perror (stderr, "FATAL: unable to malloc stack for coroutine");	623	perror ("FATAL: unable to malloc stack for coroutine");
640	_exit (EXIT_FAILURE);	624	_exit (EXIT_FAILURE);
641	}	625	}
642		626
643	#endif	627	#endif
644		628
		629	#if USE_VALGRIND
		630	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		631	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		632	cctx->ssize + (char *)cctx->sptr
		633	);
		634	#endif
		635
645	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	636	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
646		637
647	return stack;	638	return cctx;
648	}	639	}
649		640
650	static void	641	static void
651	stack_free (coro_stack *stack)	642	cctx_destroy (coro_cctx *cctx)
652	{	643	{
653	if (!stack)	644	if (!cctx)
654	return;	645	return;
655		646
		647	--cctx_count;
		648
		649	#if USE_VALGRIND
		650	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		651	#endif
		652
656	#if HAVE_MMAP	653	#if HAVE_MMAP
657	munmap (stack->sptr, stack->ssize);	654	munmap (cctx->sptr, cctx->ssize);
658	#else	655	#else
659	Safefree (stack->sptr);	656	Safefree (cctx->sptr);
660	#endif	657	#endif
661		658
662	Safefree (stack);	659	Safefree (cctx);
663	}	660	}
664		661
665	static coro_stack *stack_first;
666
667	static coro_stack *	662	static coro_cctx *
668	stack_get ()	663	cctx_get ()
669	{	664	{
670	coro_stack *stack;	665	coro_cctx *cctx;
671		666
672	if (stack_first)	667	if (cctx_first)
673	{	668	{
674	stack = stack_first;	669	cctx = cctx_first;
675	stack_first = stack->next;	670	cctx_first = cctx->next;
		671	--cctx_idle;
676	}	672	}
677	else	673	else
678	{	674	{
679	stack = stack_new ();	675	cctx = cctx_new ();
680	PL_op = PL_op->op_next;	676	PL_op = PL_op->op_next;
681	}	677	}
682		678
683	return stack;	679	return cctx;
684	}	680	}
685		681
686	static void	682	static void
687	stack_put (coro_stack *stack)	683	cctx_put (coro_cctx *cctx)
688	{	684	{
689	stack->next = stack_first;	685	/* free another cctx if overlimit */
690	stack_first = stack;	686	if (cctx_idle >= MAX_IDLE_CCTX)
		687	{
		688	coro_cctx *first = cctx_first;
		689	cctx_first = first->next;
		690	--cctx_idle;
		691
		692	assert (!first->inuse);
		693	cctx_destroy (first);
		694	}
		695
		696	++cctx_idle;
		697	cctx->next = cctx_first;
		698	cctx_first = cctx;
691	}	699	}
692		700
693	/* never call directly, always through the coro_state_transfer global variable */	701	/* never call directly, always through the coro_state_transfer global variable */
694	static void	702	static void NOINLINE
695	transfer_impl (struct coro *prev, struct coro *next, int flags)	703	transfer (struct coro *prev, struct coro *next)
696	{	704	{
697	dSTACKLEVEL;	705	dSTACKLEVEL;
698		706
699	/* sometimes transfer is only called to set idle_sp */	707	/* sometimes transfer is only called to set idle_sp */
700	if (flags == TRANSFER_SET_STACKLEVEL)	708	if (!next)
		709	{
701	((coro_stack *)prev)->idle_sp = STACKLEVEL;	710	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		711	assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */
		712	}
702	else if (prev != next)	713	else if (prev != next)
703	{	714	{
704	coro_stack *prev__stack;	715	coro_cctx *prev__cctx;
		716
		717	if (prev->flags & CF_NEW)
		718	{
		719	/* create a new empty context */
		720	Newz (0, prev->cctx, 1, coro_cctx);
		721	prev->cctx->inuse = 1;
		722	prev->flags &= ~CF_NEW;
		723	prev->flags |= CF_RUNNING;
		724	}
		725
		726	/*TODO: must not croak here */
		727	if (!prev->flags & CF_RUNNING)
		728	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		729
		730	if (next->flags & CF_RUNNING)
		731	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		732
		733	prev->flags &= ~CF_RUNNING;
		734	next->flags |= CF_RUNNING;
705		735
706	LOCK;	736	LOCK;
707		737
708	if (next->mainstack)	738	if (next->flags & CF_NEW)
709	{	739	{
710	/* coroutine already started */	740	/* need to start coroutine */
711	SAVE (prev, flags);	741	next->flags &= ~CF_NEW;
712	LOAD (next);	742	/* first get rid of the old state */
		743	save_perl (prev);
		744	/* setup coroutine call */
		745	setup_coro (next);
		746	/* need a new stack */
		747	assert (!next->cctx);
713	}	748	}
714	else	749	else
715	{	750	{
716	/* need to start coroutine */	751	/* coroutine already started */
717	/* first get rid of the old state */	752	save_perl (prev);
718	SAVE (prev, -1);	753	load_perl (next);
719	/* setup coroutine call */
720	setup_coro (next);
721	/* need a stack */
722	next->stack = 0;
723	}	754	}
724		755
725	if (!prev->stack)
726	/* create a new empty context */
727	Newz (0, prev->stack, 1, coro_stack);
728
729	prev__stack = prev->stack;	756	prev__cctx = prev->cctx;
730		757
731	/* possibly "free" the stack */	758	/* possibly "free" the cctx */
732	if (prev__stack->idle_sp == STACKLEVEL)	759	if (prev__cctx->idle_sp == STACKLEVEL)
733	{	760	{
734	stack_put (prev__stack);	761	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		762	assert (PL_top_env == prev__cctx->top_env);
		763
735	prev->stack = 0;	764	prev->cctx = 0;
		765
		766	cctx_put (prev__cctx);
		767	prev__cctx->inuse = 0;
736	}	768	}
737		769
738	if (!next->stack)	770	if (!next->cctx)
739	next->stack = stack_get ();
740
741	if (prev__stack != next->stack)
742	{	771	{
743	prev__stack->top_env = PL_top_env;	772	next->cctx = cctx_get ();
744	PL_top_env = next->stack->top_env;	773	assert (!next->cctx->inuse);
745	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	774	next->cctx->inuse = 1;
746	}	775	}
747		776
		777	if (prev__cctx != next->cctx)
		778	{
		779	prev__cctx->top_env = PL_top_env;
		780	PL_top_env = next->cctx->top_env;
		781	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		782	}
		783
748	free_coro_mortal ();	784	free_coro_mortal ();
749		785
750	UNLOCK;	786	UNLOCK;
751	}	787	}
752	}	788	}
753		789
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	790	struct transfer_args
760	{	791	{
761	struct coro *prev, *next;	792	struct coro *prev, *next;
762	int flags;
763	};	793	};
764		794
765	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	795	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
766		796
767	static void	797	static void
768	coro_state_destroy (struct coro *coro)	798	coro_state_destroy (struct coro *coro)
769	{	799	{
770	if (coro->refcnt--)	800	if (coro->refcnt--)
771	return;	801	return;
772		802
773	if (coro->mainstack && coro->mainstack != main_mainstack)	803	if (coro->mainstack && coro->mainstack != main_mainstack)
774	{	804	{
775	struct coro temp;	805	struct coro temp;
		806	Zero (&temp, 1, struct coro);
		807	temp.save = CORO_SAVE_ALL;
776		808
777	SAVE ((&temp), TRANSFER_SAVE_ALL);	809	if (coro->flags & CF_RUNNING)
778	LOAD (coro);	810	croak ("FATAL: tried to destroy currently running coroutine");
779		811
		812	save_perl (&temp);
		813	load_perl (coro);
		814
780	destroy_stacks ();	815	coro_destroy_stacks ();
781		816
782	LOAD ((&temp)); /* this will get rid of defsv etc.. */	817	load_perl (&temp); /* this will get rid of defsv etc.. */
783		818
784	coro->mainstack = 0;	819	coro->mainstack = 0;
785	}	820	}
786		821
787	stack_free (coro->stack);	822	cctx_destroy (coro->cctx);
788	SvREFCNT_dec (coro->args);	823	SvREFCNT_dec (coro->args);
789	Safefree (coro);	824	Safefree (coro);
790	}	825	}
791		826
792	static int	827	static int
…		…
808	++coro->refcnt;	843	++coro->refcnt;
809		844
810	return 0;	845	return 0;
811	}	846	}
812		847
813	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	848	static MGVTBL coro_state_vtbl = {
		849	0, 0, 0, 0,
		850	coro_state_clear,
		851	0,
		852	#ifdef MGf_DUP
		853	coro_state_dup,
		854	#else
		855	# define MGf_DUP 0
		856	#endif
		857	};
814		858
815	static struct coro *	859	static struct coro *
816	SvSTATE (SV *coro)	860	SvSTATE (SV *coro)
817	{	861	{
818	HV *stash;	862	HV *stash;
…		…
833	assert (mg->mg_type == PERL_MAGIC_ext);	877	assert (mg->mg_type == PERL_MAGIC_ext);
834	return (struct coro *)mg->mg_ptr;	878	return (struct coro *)mg->mg_ptr;
835	}	879	}
836		880
837	static void	881	static void
838	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	882	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
839	{	883	{
840	ta->prev = SvSTATE (prev);	884	ta->prev = SvSTATE (prev_sv);
841	ta->next = SvSTATE (next);	885	ta->next = SvSTATE (next_sv);
842	ta->flags = flags;
843	}	886	}
844		887
845	static void	888	static void
846	api_transfer (SV *prev, SV *next, int flags)	889	api_transfer (SV *prev_sv, SV *next_sv)
847	{	890	{
848	dTHX;
849	struct transfer_args ta;	891	struct transfer_args ta;
850		892
851	prepare_transfer (&ta, prev, next, flags);	893	prepare_transfer (&ta, prev_sv, next_sv);
852	TRANSFER (ta);	894	TRANSFER (ta);
		895	}
		896
		897	static int
		898	api_save (SV *coro_sv, int new_save)
		899	{
		900	struct coro *coro = SvSTATE (coro_sv);
		901	int old_save = coro->save;
		902
		903	if (new_save >= 0)
		904	coro->save = new_save;
		905
		906	return old_save;
853	}	907	}
854		908
855	/** Coro ********************************************************************/	909	/** Coro ********************************************************************/
856		910
857	#define PRIO_MAX 3	911	#define PRIO_MAX 3
…		…
860	#define PRIO_LOW -1	914	#define PRIO_LOW -1
861	#define PRIO_IDLE -3	915	#define PRIO_IDLE -3
862	#define PRIO_MIN -4	916	#define PRIO_MIN -4
863		917
864	/* for Coro.pm */	918	/* for Coro.pm */
865	static GV *coro_current, *coro_idle;	919	static SV *coro_current;
866	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	920	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
867	static int coro_nready;	921	static int coro_nready;
868		922
869	static void	923	static void
870	coro_enq (SV *sv)	924	coro_enq (SV *coro_sv)
871	{	925	{
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);	926	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
880	coro_nready++;	927	coro_nready++;
881	}	928	}
882		929
883	static SV *	930	static SV *
884	coro_deq (int min_prio)	931	coro_deq (int min_prio)
…		…
897	}	944	}
898		945
899	return 0;	946	return 0;
900	}	947	}
901		948
902	static void	949	static int
903	api_ready (SV *coro)	950	api_ready (SV *coro_sv)
904	{	951	{
905	dTHX;	952	struct coro *coro;
906		953
907	if (SvROK (coro))	954	if (SvROK (coro_sv))
908	coro = SvRV (coro);	955	coro_sv = SvRV (coro_sv);
		956
		957	coro = SvSTATE (coro_sv);
		958
		959	if (coro->flags & CF_READY)
		960	return 0;
		961
		962	coro->flags |= CF_READY;
909		963
910	LOCK;	964	LOCK;
911	coro_enq (SvREFCNT_inc (coro));	965	coro_enq (SvREFCNT_inc (coro_sv));
912	UNLOCK;	966	UNLOCK;
		967
		968	return 1;
		969	}
		970
		971	static int
		972	api_is_ready (SV *coro_sv)
		973	{
		974	return !!SvSTATE (coro_sv)->flags & CF_READY;
913	}	975	}
914		976
915	static void	977	static void
916	prepare_schedule (struct transfer_args *ta)	978	prepare_schedule (struct transfer_args *ta)
917	{	979	{
918	SV *current, *prev, *next;	980	SV *prev, *next;
919
920	current = GvSV (coro_current);
921		981
922	for (;;)	982	for (;;)
923	{	983	{
924	LOCK;	984	LOCK;
925	next = coro_deq (PRIO_MIN);	985	next = coro_deq (PRIO_MIN);
…		…
934	ENTER;	994	ENTER;
935	SAVETMPS;	995	SAVETMPS;
936		996
937	PUSHMARK (SP);	997	PUSHMARK (SP);
938	PUTBACK;	998	PUTBACK;
939	call_sv (GvSV (coro_idle), G_DISCARD);	999	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
940		1000
941	FREETMPS;	1001	FREETMPS;
942	LEAVE;	1002	LEAVE;
943	}	1003	}
944	}	1004	}
945		1005
946	prev = SvRV (current);	1006	prev = SvRV (coro_current);
947	SvRV (current) = next;	1007	SvRV_set (coro_current, next);
948		1008
949	/* free this only after the transfer */	1009	/* free this only after the transfer */
950	LOCK;	1010	LOCK;
951	free_coro_mortal ();	1011	free_coro_mortal ();
952	UNLOCK;	1012	UNLOCK;
953	coro_mortal = prev;	1013	coro_mortal = prev;
954		1014
		1015	assert (!SvROK(prev));//D
		1016	assert (!SvROK(next));//D
		1017
955	ta->prev = SvSTATE (prev);	1018	ta->prev = SvSTATE (prev);
956	ta->next = SvSTATE (next);	1019	ta->next = SvSTATE (next);
957	ta->flags = TRANSFER_SAVE_ALL;	1020
		1021	assert (ta->next->flags & CF_READY);
		1022	ta->next->flags &= ~CF_READY;
958	}	1023	}
959		1024
960	static void	1025	static void
961	prepare_cede (struct transfer_args *ta)	1026	prepare_cede (struct transfer_args *ta)
962	{	1027	{
963	LOCK;	1028	api_ready (coro_current);
964	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
965	UNLOCK;
966		1029
967	prepare_schedule (ta);	1030	prepare_schedule (ta);
968	}	1031	}
969		1032
970	static void	1033	static void
971	api_schedule (void)	1034	api_schedule (void)
972	{	1035	{
973	dTHX;
974	struct transfer_args ta;	1036	struct transfer_args ta;
975		1037
976	prepare_schedule (&ta);	1038	prepare_schedule (&ta);
977	TRANSFER (ta);	1039	TRANSFER (ta);
978	}	1040	}
979		1041
980	static void	1042	static void
981	api_cede (void)	1043	api_cede (void)
982	{	1044	{
983	dTHX;
984	struct transfer_args ta;	1045	struct transfer_args ta;
985		1046
986	prepare_cede (&ta);	1047	prepare_cede (&ta);
987	TRANSFER (ta);	1048	TRANSFER (ta);
988	}	1049	}
…		…
998	#endif	1059	#endif
999	BOOT_PAGESIZE;	1060	BOOT_PAGESIZE;
1000		1061
1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1062	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002		1063
1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1064	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1065	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1066	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1067	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1068	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1006		1069
1007	main_mainstack = PL_mainstack;	1070	main_mainstack = PL_mainstack;
1008		1071
1009	coroapi.ver = CORO_API_VERSION;	1072	coroapi.ver = CORO_API_VERSION;
1010	coroapi.transfer = api_transfer;	1073	coroapi.transfer = api_transfer;
…		…
1020	HV *hv;	1083	HV *hv;
1021	int i;	1084	int i;
1022		1085
1023	Newz (0, coro, 1, struct coro);	1086	Newz (0, coro, 1, struct coro);
1024	coro->args = newAV ();	1087	coro->args = newAV ();
		1088	coro->save = CORO_SAVE_ALL;
		1089	coro->flags = CF_NEW;
1025		1090
1026	hv = newHV ();	1091	hv = newHV ();
1027	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1092	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));	1093	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029		1094
1030	for (i = 1; i < items; i++)	1095	for (i = 1; i < items; i++)
1031	av_push (coro->args, newSVsv (ST (i)));	1096	av_push (coro->args, newSVsv (ST (i)));
1032
1033	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1034	/*coro->stack = 0;*/
1035	}	1097	}
1036	OUTPUT:	1098	OUTPUT:
		1099	RETVAL
		1100
		1101	int
		1102	save (SV *coro, int new_save = -1)
		1103	CODE:
		1104	RETVAL = api_save (coro, new_save);
		1105	OUTPUT:
1037	RETVAL	1106	RETVAL
1038		1107
1039	void	1108	void
1040	_set_stacklevel (...)	1109	_set_stacklevel (...)
1041	ALIAS:	1110	ALIAS:
1042	Coro::State::transfer = 1	1111	Coro::State::transfer = 1
1043	Coro::schedule = 2	1112	Coro::schedule = 2
1044	Coro::cede = 3	1113	Coro::cede = 3
1045	Coro::Cont::yield = 4
1046	CODE:	1114	CODE:
1047	{	1115	{
1048	struct transfer_args ta;	1116	struct transfer_args ta;
1049		1117
1050	switch (ix)	1118	switch (ix)
1051	{	1119	{
1052	case 0:	1120	case 0:
1053	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1121	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1054	ta.next = 0;	1122	ta.next = 0;
1055	ta.flags = TRANSFER_SET_STACKLEVEL;
1056	break;	1123	break;
1057		1124
1058	case 1:	1125	case 1:
1059	if (items != 3)	1126	if (items != 2)
1060	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1127	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1061		1128
1062	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1129	prepare_transfer (&ta, ST (0), ST (1));
1063	break;	1130	break;
1064		1131
1065	case 2:	1132	case 2:
1066	prepare_schedule (&ta);	1133	prepare_schedule (&ta);
1067	break;	1134	break;
1068		1135
1069	case 3:	1136	case 3:
1070	prepare_cede (&ta);	1137	prepare_cede (&ta);
1071	break;	1138	break;
1072
1073	case 4:
1074	{
1075	SV *yieldstack;
1076	SV *sv;
1077	AV *defav = GvAV (PL_defgv);
1078
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;
1098
1099	}	1139	}
1100		1140
1101	TRANSFER (ta);	1141	TRANSFER (ta);
1102	}	1142	}
1103		1143
…		…
1110	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);	1150	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1111		1151
1112	++coro_src->refcnt;	1152	++coro_src->refcnt;
1113	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;	1153	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1114	}	1154	}
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		1155
1122	void	1156	void
1123	_exit (code)	1157	_exit (code)
1124	int code	1158	int code
1125	PROTOTYPE: $	1159	PROTOTYPE: $
1126	CODE:	1160	CODE:
1127	_exit (code);	1161	_exit (code);
1128		1162
		1163	int
		1164	cctx_count ()
		1165	CODE:
		1166	RETVAL = cctx_count;
		1167	OUTPUT:
		1168	RETVAL
		1169
		1170	int
		1171	cctx_idle ()
		1172	CODE:
		1173	RETVAL = cctx_idle;
		1174	OUTPUT:
		1175	RETVAL
		1176
1129	MODULE = Coro::State PACKAGE = Coro	1177	MODULE = Coro::State PACKAGE = Coro
1130		1178
1131	BOOT:	1179	BOOT:
1132	{	1180	{
1133	int i;	1181	int i;
…		…
1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1187	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1188	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1189	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1190	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143		1191
1144	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1192	coro_current = get_sv ("Coro::current", FALSE);
1145	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1193	SvREADONLY_on (coro_current);
1146		1194
1147	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1195	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148	coro_ready[i] = newAV ();	1196	coro_ready[i] = newAV ();
1149		1197
1150	{	1198	{
1151	SV *sv = perl_get_sv("Coro::API", 1);	1199	SV *sv = perl_get_sv("Coro::API", 1);
1152		1200
1153	coroapi.schedule = api_schedule;	1201	coroapi.schedule = api_schedule;
		1202	coroapi.save = api_save;
1154	coroapi.cede = api_cede;	1203	coroapi.cede = api_cede;
1155	coroapi.ready = api_ready;	1204	coroapi.ready = api_ready;
		1205	coroapi.is_ready = api_is_ready;
1156	coroapi.nready = &coro_nready;	1206	coroapi.nready = &coro_nready;
1157	coroapi.current = coro_current;	1207	coroapi.current = coro_current;
1158		1208
1159	GCoroAPI = &coroapi;	1209	GCoroAPI = &coroapi;
1160	sv_setiv (sv, (IV)&coroapi);	1210	sv_setiv (sv, (IV)&coroapi);
1161	SvREADONLY_on (sv);	1211	SvREADONLY_on (sv);
1162	}	1212	}
1163	}	1213	}
		1214
		1215	void
		1216	_set_current (SV *current)
		1217	PROTOTYPE: $
		1218	CODE:
		1219	SvREFCNT_dec (SvRV (coro_current));
		1220	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1164		1221
1165	int	1222	int
1166	prio (Coro::State coro, int newprio = 0)	1223	prio (Coro::State coro, int newprio = 0)
1167	ALIAS:	1224	ALIAS:
1168	nice = 1	1225	nice = 1
…		…
1180		1237
1181	coro->prio = newprio;	1238	coro->prio = newprio;
1182	}	1239	}
1183	}	1240	}
1184		1241
1185	void	1242	SV *
1186	ready (SV *self)	1243	ready (SV *self)
1187	PROTOTYPE: $	1244	PROTOTYPE: $
1188	CODE:	1245	CODE:
1189	api_ready (self);	1246	RETVAL = boolSV (api_ready (self));
		1247	OUTPUT:
		1248	RETVAL
		1249
		1250	SV *
		1251	is_ready (SV *self)
		1252	PROTOTYPE: $
		1253	CODE:
		1254	RETVAL = boolSV (api_is_ready (self));
		1255	OUTPUT:
		1256	RETVAL
1190		1257
1191	int	1258	int
1192	nready (...)	1259	nready (...)
1193	PROTOTYPE:	1260	PROTOTYPE:
1194	CODE:	1261	CODE:
…		…
1200		1267
1201	SV *	1268	SV *
1202	_get_state ()	1269	_get_state ()
1203	CODE:	1270	CODE:
1204	{	1271	{
1205	struct {	1272	struct io_state *data;
1206	int errorno;
1207	int laststype;
1208	int laststatval;
1209	Stat_t statcache;
1210	} data;
1211		1273
		1274	RETVAL = newSV (sizeof (struct io_state));
		1275	data = (struct io_state *)SvPVX (RETVAL);
		1276	SvCUR_set (RETVAL, sizeof (struct io_state));
		1277	SvPOK_only (RETVAL);
		1278
1212	data.errorno = errno;	1279	data->errorno = errno;
1213	data.laststype = PL_laststype;	1280	data->laststype = PL_laststype;
1214	data.laststatval = PL_laststatval;	1281	data->laststatval = PL_laststatval;
1215	data.statcache = PL_statcache;	1282	data->statcache = PL_statcache;
1216
1217	RETVAL = newSVpvn ((char *)&data, sizeof data);
1218	}	1283	}
1219	OUTPUT:	1284	OUTPUT:
1220	RETVAL	1285	RETVAL
1221		1286
1222	void	1287	void
1223	_set_state (char *data_)	1288	_set_state (char *data_)
1224	PROTOTYPE: $	1289	PROTOTYPE: $
1225	CODE:	1290	CODE:
1226	{	1291	{
1227	struct {	1292	struct io_state *data = (void *)data_;
1228	int errorno;
1229	int laststype;
1230	int laststatval;
1231	Stat_t statcache;
1232	} *data = (void *)data_;
1233		1293
1234	errno = data->errorno;	1294	errno = data->errorno;
1235	PL_laststype = data->laststype;	1295	PL_laststype = data->laststype;
1236	PL_laststatval = data->laststatval;	1296	PL_laststatval = data->laststatval;
1237	PL_statcache = data->statcache;	1297	PL_statcache = data->statcache;
1238	}	1298	}
		1299

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