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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.61 by root, Tue Aug 10 01:56:30 2004 UTC vs.
Revision 1.98 by root, Sun Nov 26 21:25:53 2006 UTC

1	#define PERL_NO_GET_CONTEXT	1	#include "libcoro/coro.c"
2		2
3	#include "EXTERN.h"	3	#include "EXTERN.h"
4	#include "perl.h"	4	#include "perl.h"
5	#include "XSUB.h"	5	#include "XSUB.h"
6		6
7	#include "patchlevel.h"	7	#include "patchlevel.h"
8		8
9	#if PATCHLEVEL < 6	9	#if PERL_VERSION < 6
10	# ifndef PL_ppaddr	10	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	11	# define PL_ppaddr ppaddr
12	# endif	12	# endif
13	# ifndef call_sv	13	# ifndef call_sv
14	# define call_sv perl_call_sv	14	# define call_sv perl_call_sv
…		…
25	# ifndef IS_PADCONST	25	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	26	# define IS_PADCONST(v) 0
27	# endif	27	# endif
28	#endif	28	#endif
29		29
30	#include "libcoro/coro.c"
31
32	#include <signal.h>	30	#include <stdio.h>
		31	#include <errno.h>
		32
		33	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		34	# undef STACKGUARD
		35	#endif
		36
		37	#ifndef STACKGUARD
		38	# define STACKGUARD 0
		39	#endif
33		40
34	#ifdef HAVE_MMAP	41	#ifdef HAVE_MMAP
35	# include <unistd.h>	42	# include <unistd.h>
36	# include <sys/mman.h>	43	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS	44	# ifndef MAP_ANONYMOUS
…		…
39	# define MAP_ANONYMOUS MAP_ANON	46	# define MAP_ANONYMOUS MAP_ANON
40	# else	47	# else
41	# undef HAVE_MMAP	48	# undef HAVE_MMAP
42	# endif	49	# endif
43	# 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
44	#endif	58	# endif
45		59	#endif
46	#define SUB_INIT "Coro::State::initialize"
47	#define UCORO_STATE "_coro_state"
48		60
49	/* The next macro should declare a variable stacklevel that contains and approximation	61	/* The next macro should declare a variable stacklevel that contains and approximation
50	* to the current C stack pointer. Its property is that it changes with each call	62	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	63	* and should be unique. */
		64	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	65	#define STACKLEVEL ((void *)&stacklevel)
53		66
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	67	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		68
56	#define labs(l) ((l) >= 0 ? (l) : -(l))
57
58	#include "CoroAPI.h"	69	#include "CoroAPI.h"
		70
		71	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59		72
60	#ifdef USE_ITHREADS	73	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	74	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	75	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	76	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	77	#else
65	# define LOCK 0	78	# define LOCK (void)0
66	# define UNLOCK 0	79	# define UNLOCK (void)0
67	#endif	80	#endif
68		81
69	static struct CoroAPI coroapi;	82	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	83	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	84	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV *coro_mortal; /* will be freed after next transfer */	85	static SV *coro_mortal; /* will be freed after next transfer */
75		86
76	/* this is actually not only the c stack but also c registers etc... */	87	/* this is a structure representing a c-level coroutine */
77	typedef struct {	88	typedef struct coro_stack {
78	int refcnt; /* pointer reference counter */	89	struct coro_stack *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		90
82	coro_context cctx;	91	/* the stack */
83
84	void *sptr;	92	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	93	long ssize; /* positive == mmap, otherwise malloc */
		94
		95	/* cpu state */
		96	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		97	JMPENV *top_env;
		98	coro_context cctx;
86	} coro_stack;	99	} coro_stack;
87		100
		101	/* this is a structure representing a perl-level coroutine */
88	struct coro {	102	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	103	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;
91
92	/* the optional C context */
93	coro_stack *stack;	104	coro_stack *stack;
94	void *cursp;	105
		106	/* data associated with this coroutine (initial args) */
		107	AV *args;
95	int gencnt;	108	int refcnt;
96		109
97	/* optionally saved, might be zero */	110	/* optionally saved, might be zero */
98	AV *defav;	111	AV *defav;
99	SV *defsv;	112	SV *defsv;
100	SV *errsv;	113	SV *errsv;
…		…
109	AV *mainstack;	122	AV *mainstack;
110	SV **stack_sp;	123	SV **stack_sp;
111	OP *op;	124	OP *op;
112	SV **curpad;	125	SV **curpad;
113	AV *comppad;	126	AV *comppad;
		127	CV *compcv;
114	SV **stack_base;	128	SV **stack_base;
115	SV **stack_max;	129	SV **stack_max;
116	SV **tmps_stack;	130	SV **tmps_stack;
117	I32 tmps_floor;	131	I32 tmps_floor;
118	I32 tmps_ix;	132	I32 tmps_ix;
…		…
127	I32 savestack_ix;	141	I32 savestack_ix;
128	I32 savestack_max;	142	I32 savestack_max;
129	OP **retstack;	143	OP **retstack;
130	I32 retstack_ix;	144	I32 retstack_ix;
131	I32 retstack_max;	145	I32 retstack_max;
		146	PMOP *curpm;
132	COP *curcop;	147	COP *curcop;
133	JMPENV *top_env;
134		148
135	/* data associated with this coroutine (initial args) */	149	/* coro process data */
136	AV *args;	150	int prio;
137	};	151	};
138		152
139	typedef struct coro *Coro__State;	153	typedef struct coro *Coro__State;
140	typedef struct coro *Coro__State_or_hashref;	154	typedef struct coro *Coro__State_or_hashref;
141		155
142	/* mostly copied from op.c:cv_clone2 */	156	static AV *
143	STATIC AV *	157	coro_clone_padlist (CV *cv)
144	clone_padlist (pTHX_ AV *protopadlist)
145	{	158	{
146	AV *av;	159	AV *padlist = CvPADLIST (cv);
147	I32 ix;
148	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
149	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
150	SV **pname = AvARRAY (protopad_name);
151	SV **ppad = AvARRAY (protopad);
152	I32 fname = AvFILLp (protopad_name);
153	I32 fpad = AvFILLp (protopad);
154	AV *newpadlist, *newpad_name, *newpad;	160	AV *newpadlist, *newpad;
155	SV **npad;
156
157	newpad_name = newAV ();
158	for (ix = fname; ix >= 0; ix--)
159	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161	newpad = newAV ();
162	av_fill (newpad, AvFILLp (protopad));
163	npad = AvARRAY (newpad);
164		161
165	newpadlist = newAV ();	162	newpadlist = newAV ();
166	AvREAL_off (newpadlist);	163	AvREAL_off (newpadlist);
167	av_store (newpadlist, 0, (SV *) newpad_name);	164	#if PERL_VERSION < 9
		165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		166	#else
		167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		168	#endif
		169	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		170	--AvFILLp (padlist);
		171
		172	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
168	av_store (newpadlist, 1, (SV *) newpad);	173	av_store (newpadlist, 1, (SV *)newpad);
169
170	av = newAV (); /* will be @_ */
171	av_extend (av, 0);
172	av_store (newpad, 0, (SV *) av);
173	AvFLAGS (av) = AVf_REIFY;
174
175	for (ix = fpad; ix > 0; ix--)
176	{
177	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
178
179	if (namesv && namesv != &PL_sv_undef)
180	{
181	char *name = SvPVX (namesv); /* XXX */
182
183	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
184	{ /* lexical from outside? */
185	npad[ix] = SvREFCNT_inc (ppad[ix]);
186	}
187	else
188	{ /* our own lexical */
189	SV *sv;
190	if (*name == '&')
191	sv = SvREFCNT_inc (ppad[ix]);
192	else if (*name == '@')
193	sv = (SV *) newAV ();
194	else if (*name == '%')
195	sv = (SV *) newHV ();
196	else
197	sv = NEWSV (0, 0);
198
199	#ifdef SvPADBUSY
200	if (!SvPADBUSY (sv))
201	#endif
202	SvPADMY_on (sv);
203
204	npad[ix] = sv;
205	}
206	}
207	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
208	{
209	npad[ix] = SvREFCNT_inc (ppad[ix]);
210	}
211	else
212	{
213	SV *sv = NEWSV (0, 0);
214	SvPADTMP_on (sv);
215	npad[ix] = sv;
216	}
217	}
218
219	#if 0 /* return -ENOTUNDERSTOOD */
220	/* Now that vars are all in place, clone nested closures. */
221
222	for (ix = fpad; ix > 0; ix--) {
223	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224	if (namesv
225	&& namesv != &PL_sv_undef
226	&& !(SvFLAGS(namesv) & SVf_FAKE)
227	&& *SvPVX(namesv) == '&'
228	&& CvCLONE(ppad[ix]))
229	{
230	CV *kid = cv_clone((CV*)ppad[ix]);
231	SvREFCNT_dec(ppad[ix]);
232	CvCLONE_on(kid);
233	SvPADMY_on(kid);
234	npad[ix] = (SV*)kid;
235	}
236	}
237	#endif
238		174
239	return newpadlist;	175	return newpadlist;
240	}	176	}
241		177
242	STATIC void	178	static void
243	free_padlist (pTHX_ AV *padlist)	179	free_padlist (AV *padlist)
244	{	180	{
245	/* may be during global destruction */	181	/* may be during global destruction */
246	if (SvREFCNT (padlist))	182	if (SvREFCNT (padlist))
247	{	183	{
248	I32 i = AvFILLp (padlist);	184	I32 i = AvFILLp (padlist);
…		…
261		197
262	SvREFCNT_dec ((SV*)padlist);	198	SvREFCNT_dec ((SV*)padlist);
263	}	199	}
264	}	200	}
265		201
266	STATIC int	202	static int
267	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	203	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268	{	204	{
269	AV *padlist;	205	AV *padlist;
270	AV *av = (AV *)mg->mg_obj;	206	AV *av = (AV *)mg->mg_obj;
271		207
272	/* casting is fun. */	208	/* casting is fun. */
273	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	209	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274	free_padlist (aTHX_ padlist);	210	free_padlist (padlist);
275		211
276	SvREFCNT_dec (av);	212	SvREFCNT_dec (av);
		213
		214	return 0;
277	}	215	}
278		216
279	#define PERL_MAGIC_coro PERL_MAGIC_ext	217	#define PERL_MAGIC_coro PERL_MAGIC_ext
280		218
281	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	219	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
282		220
283	/* the next two functions merely cache the padlists */	221	/* the next two functions merely cache the padlists */
284	STATIC void	222	static void
285	get_padlist (pTHX_ CV *cv)	223	get_padlist (CV *cv)
286	{	224	{
287	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	225	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
288		226
289	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	227	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
290	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	228	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
291	else	229	else
		230	{
		231	#if 0
		232	/* this is probably cleaner, but also slower? */
		233	CV *cp = Perl_cv_clone (cv);
		234	CvPADLIST (cv) = CvPADLIST (cp);
		235	CvPADLIST (cp) = 0;
		236	SvREFCNT_dec (cp);
		237	#else
292	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	238	CvPADLIST (cv) = coro_clone_padlist (cv);
		239	#endif
		240	}
293	}	241	}
294		242
295	STATIC void	243	static void
296	put_padlist (pTHX_ CV *cv)	244	put_padlist (CV *cv)
297	{	245	{
298	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	246	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
299		247
300	if (!mg)	248	if (!mg)
301	{	249	{
…		…
309	}	257	}
310		258
311	#define SB do {	259	#define SB do {
312	#define SE } while (0)	260	#define SE } while (0)
313		261
314	#define LOAD(state) load_state(aTHX_ (state));	262	#define LOAD(state) load_state((state));
315	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	263	#define SAVE(state,flags) save_state((state),(flags));
316		264
317	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	265	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
318		266
319	static void	267	static void
320	load_state(pTHX_ Coro__State c)	268	load_state(Coro__State c)
321	{	269	{
322	PL_dowarn = c->dowarn;	270	PL_dowarn = c->dowarn;
323	PL_in_eval = c->in_eval;	271	PL_in_eval = c->in_eval;
324		272
325	PL_curstackinfo = c->curstackinfo;	273	PL_curstackinfo = c->curstackinfo;
…		…
327	PL_mainstack = c->mainstack;	275	PL_mainstack = c->mainstack;
328	PL_stack_sp = c->stack_sp;	276	PL_stack_sp = c->stack_sp;
329	PL_op = c->op;	277	PL_op = c->op;
330	PL_curpad = c->curpad;	278	PL_curpad = c->curpad;
331	PL_comppad = c->comppad;	279	PL_comppad = c->comppad;
		280	PL_compcv = c->compcv;
332	PL_stack_base = c->stack_base;	281	PL_stack_base = c->stack_base;
333	PL_stack_max = c->stack_max;	282	PL_stack_max = c->stack_max;
334	PL_tmps_stack = c->tmps_stack;	283	PL_tmps_stack = c->tmps_stack;
335	PL_tmps_floor = c->tmps_floor;	284	PL_tmps_floor = c->tmps_floor;
336	PL_tmps_ix = c->tmps_ix;	285	PL_tmps_ix = c->tmps_ix;
…		…
342	PL_scopestack_ix = c->scopestack_ix;	291	PL_scopestack_ix = c->scopestack_ix;
343	PL_scopestack_max = c->scopestack_max;	292	PL_scopestack_max = c->scopestack_max;
344	PL_savestack = c->savestack;	293	PL_savestack = c->savestack;
345	PL_savestack_ix = c->savestack_ix;	294	PL_savestack_ix = c->savestack_ix;
346	PL_savestack_max = c->savestack_max;	295	PL_savestack_max = c->savestack_max;
		296	#if PERL_VERSION < 9
347	PL_retstack = c->retstack;	297	PL_retstack = c->retstack;
348	PL_retstack_ix = c->retstack_ix;	298	PL_retstack_ix = c->retstack_ix;
349	PL_retstack_max = c->retstack_max;	299	PL_retstack_max = c->retstack_max;
		300	#endif
		301	PL_curpm = c->curpm;
350	PL_curcop = c->curcop;	302	PL_curcop = c->curcop;
351	PL_top_env = c->top_env;
352		303
353	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
354	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
355	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	306	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
356		307
…		…
363	{	314	{
364	AV *padlist = (AV *)POPs;	315	AV *padlist = (AV *)POPs;
365		316
366	if (padlist)	317	if (padlist)
367	{	318	{
368	put_padlist (aTHX_ cv); /* mark this padlist as available */	319	put_padlist (cv); /* mark this padlist as available */
369	CvPADLIST(cv) = padlist;	320	CvPADLIST(cv) = padlist;
370	}	321	}
371		322
372	++CvDEPTH(cv);	323	++CvDEPTH(cv);
373	}	324	}
…		…
375	PUTBACK;	326	PUTBACK;
376	}	327	}
377	}	328	}
378		329
379	static void	330	static void
380	save_state(pTHX_ Coro__State c, int flags)	331	save_state(Coro__State c, int flags)
381	{	332	{
382	{	333	{
383	dSP;	334	dSP;
384	I32 cxix = cxstack_ix;	335	I32 cxix = cxstack_ix;
385	PERL_CONTEXT *ccstk = cxstack;	336	PERL_CONTEXT *ccstk = cxstack;
…		…
413	}	364	}
414		365
415	PUSHs ((SV *)CvPADLIST(cv));	366	PUSHs ((SV *)CvPADLIST(cv));
416	PUSHs ((SV *)cv);	367	PUSHs ((SV *)cv);
417		368
418	get_padlist (aTHX_ cv); /* this is a monster */	369	get_padlist (cv);
419	}	370	}
420	}	371	}
421	#ifdef CXt_FORMAT	372	#ifdef CXt_FORMAT
422	else if (CxTYPE(cx) == CXt_FORMAT)	373	else if (CxTYPE(cx) == CXt_FORMAT)
423	{	374	{
…		…
451	c->mainstack = PL_mainstack;	402	c->mainstack = PL_mainstack;
452	c->stack_sp = PL_stack_sp;	403	c->stack_sp = PL_stack_sp;
453	c->op = PL_op;	404	c->op = PL_op;
454	c->curpad = PL_curpad;	405	c->curpad = PL_curpad;
455	c->comppad = PL_comppad;	406	c->comppad = PL_comppad;
		407	c->compcv = PL_compcv;
456	c->stack_base = PL_stack_base;	408	c->stack_base = PL_stack_base;
457	c->stack_max = PL_stack_max;	409	c->stack_max = PL_stack_max;
458	c->tmps_stack = PL_tmps_stack;	410	c->tmps_stack = PL_tmps_stack;
459	c->tmps_floor = PL_tmps_floor;	411	c->tmps_floor = PL_tmps_floor;
460	c->tmps_ix = PL_tmps_ix;	412	c->tmps_ix = PL_tmps_ix;
…		…
466	c->scopestack_ix = PL_scopestack_ix;	418	c->scopestack_ix = PL_scopestack_ix;
467	c->scopestack_max = PL_scopestack_max;	419	c->scopestack_max = PL_scopestack_max;
468	c->savestack = PL_savestack;	420	c->savestack = PL_savestack;
469	c->savestack_ix = PL_savestack_ix;	421	c->savestack_ix = PL_savestack_ix;
470	c->savestack_max = PL_savestack_max;	422	c->savestack_max = PL_savestack_max;
		423	#if PERL_VERSION < 9
471	c->retstack = PL_retstack;	424	c->retstack = PL_retstack;
472	c->retstack_ix = PL_retstack_ix;	425	c->retstack_ix = PL_retstack_ix;
473	c->retstack_max = PL_retstack_max;	426	c->retstack_max = PL_retstack_max;
		427	#endif
		428	c->curpm = PL_curpm;
474	c->curcop = PL_curcop;	429	c->curcop = PL_curcop;
475	c->top_env = PL_top_env;
476	}	430	}
477		431
478	/*	432	/*
479	* allocate various perl stacks. This is an exact copy	433	* allocate various perl stacks. This is an exact copy
480	* of perl.c:init_stacks, except that it uses less memory	434	* of perl.c:init_stacks, except that it uses less memory
481	* on the (sometimes correct) assumption that coroutines do	435	* on the (sometimes correct) assumption that coroutines do
482	* not usually need a lot of stackspace.	436	* not usually need a lot of stackspace.
483	*/	437	*/
484	STATIC void	438	static void
485	coro_init_stacks (pTHX)	439	coro_init_stacks ()
486	{	440	{
487	LOCK;	441	LOCK;
488		442
489	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	443	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
490	PL_curstackinfo->si_type = PERLSI_MAIN;	444	PL_curstackinfo->si_type = PERLSI_MAIN;
…		…
514		468
515	New(54,PL_savestack,96,ANY);	469	New(54,PL_savestack,96,ANY);
516	PL_savestack_ix = 0;	470	PL_savestack_ix = 0;
517	PL_savestack_max = 96;	471	PL_savestack_max = 96;
518		472
		473	#if PERL_VERSION < 9
519	New(54,PL_retstack,8,OP*);	474	New(54,PL_retstack,8,OP*);
520	PL_retstack_ix = 0;	475	PL_retstack_ix = 0;
521	PL_retstack_max = 8;	476	PL_retstack_max = 8;
		477	#endif
522		478
523	UNLOCK;	479	UNLOCK;
524	}	480	}
525		481
526	/*	482	/*
527	* destroy the stacks, the callchain etc...	483	* destroy the stacks, the callchain etc...
528	*/	484	*/
529	STATIC void	485	static void
530	destroy_stacks(pTHX)	486	destroy_stacks()
531	{	487	{
532	if (!IN_DESTRUCT)	488	if (!IN_DESTRUCT)
533	{	489	{
534	/* is this ugly, I ask? */	490	/* is this ugly, I ask? */
535	LEAVE_SCOPE (0);	491	LEAVE_SCOPE (0);
…		…
566		522
567	Safefree (PL_tmps_stack);	523	Safefree (PL_tmps_stack);
568	Safefree (PL_markstack);	524	Safefree (PL_markstack);
569	Safefree (PL_scopestack);	525	Safefree (PL_scopestack);
570	Safefree (PL_savestack);	526	Safefree (PL_savestack);
		527	#if PERL_VERSION < 9
571	Safefree (PL_retstack);	528	Safefree (PL_retstack);
572	}
573
574	static void
575	allocate_stack (Coro__State ctx, int alloc)
576	{
577	coro_stack *stack;
578
579	New (0, stack, 1, coro_stack);
580
581	stack->refcnt = 1;
582	stack->usecnt = 1;
583	stack->gencnt = ctx->gencnt = 0;
584
585	if (alloc)
586	{
587	#if HAVE_MMAP
588	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
589	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
590	if (stack->sptr == (void *)-1)
591	#endif	529	#endif
592	{
593	/*FIXME*//*D*//* reasonable stack size! */
594	stack->ssize = - (8192 * sizeof (long));
595	New (0, stack->sptr, 8192, long);
596	}
597	}
598	else
599	stack->sptr = 0;
600
601	ctx->stack = stack;
602	}	530	}
603		531
604	static void	532	static void
605	deallocate_stack (Coro__State ctx)	533	setup_coro (struct coro *coro)
606	{
607	coro_stack *stack = ctx->stack;
608
609	ctx->stack = 0;
610
611	if (stack)
612	{
613	if (!--stack->refcnt)
614	{
615	#ifdef HAVE_MMAP
616	if (stack->ssize > 0 && stack->sptr)
617	munmap (stack->sptr, stack->ssize);
618	else
619	#endif
620	Safefree (stack->sptr);
621
622	Safefree (stack);
623	}
624	else if (ctx->gencnt == stack->gencnt)
625	--stack->usecnt;
626	}
627	}
628
629	static void
630	setup_coro (void *arg)
631	{	534	{
632	/*	535	/*
633	* emulate part of the perl startup here.	536	* emulate part of the perl startup here.
634	*/	537	*/
635	dTHX;	538	dTHX;
636	dSP;	539	dSP;
637	Coro__State ctx = (Coro__State)arg;	540	UNOP myop;
638	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);	541	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
639		542
640	coro_init_stacks (aTHX);	543	coro_init_stacks ();
641	/*PL_curcop = 0;*/	544	/*PL_curcop = 0;*/
642	/*PL_in_eval = PL_in_eval;*/ /* inherit */	545	/*PL_in_eval = PL_in_eval;*/ /* inherit */
643	SvREFCNT_dec (GvAV (PL_defgv));	546	SvREFCNT_dec (GvAV (PL_defgv));
644	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	547	GvAV (PL_defgv) = coro->args; coro->args = 0;
645		548
646	SPAGAIN;	549	SPAGAIN;
647		550
648	if (ctx->stack)
649	{
650	ctx->cursp = 0;
651
652	PUSHMARK(SP);
653	PUTBACK;
654	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
655
656	if (SvTRUE (ERRSV))
657	croak (NULL);
658	else
659	croak ("FATAL: CCTXT coroutine returned!");
660	}
661	else
662	{
663	UNOP myop;
664
665	PL_op = (OP *)&myop;
666
667	Zero(&myop, 1, UNOP);	551	Zero (&myop, 1, UNOP);
668	myop.op_next = Nullop;	552	myop.op_next = Nullop;
669	myop.op_flags = OPf_WANT_VOID;	553	myop.op_flags = OPf_WANT_VOID;
670		554
		555	PL_op = (OP *)&myop;
		556
671	PUSHMARK(SP);	557	PUSHMARK(SP);
672	XPUSHs (sub_init);	558	XPUSHs (sub_init);
673	/*
674	* the next line is slightly wrong, as PL_op->op_next
675	* is actually being executed so we skip the first op.
676	* that doesn't matter, though, since it is only
677	* pp_nextstate and we never return...
678	* ah yes, and I don't care anyways ;)
679	*/
680	PUTBACK;	559	PUTBACK;
681	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	560	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
682	SPAGAIN;	561	SPAGAIN;
683		562
684	ENTER; /* necessary e.g. for dounwind */	563	ENTER; /* necessary e.g. for dounwind */
685	}
686	}	564	}
687		565
688	static void	566	static void
689	continue_coro (void *arg)	567	free_coro_mortal ()
690	{	568	{
691	/*
692	* this is a _very_ stripped down perl interpreter ;)
693	*/
694	dTHX;
695	Coro__State ctx = (Coro__State)arg;
696	JMPENV coro_start_env;
697
698	PL_top_env = &ctx->start_env;
699
700	ctx->cursp = 0;
701	PL_op = PL_op->op_next;
702	CALLRUNOPS(aTHX);
703
704	abort ();
705	}
706
707	STATIC void
708	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
709	{
710	dSTACKLEVEL;
711
712	if (prev != next)
713	{
714	if (next->mainstack)
715	{
716	LOCK;
717	SAVE (prev, flags);
718	LOAD (next);
719	UNLOCK;
720
721	/* mark this state as in-use */
722	next->mainstack = 0;
723	next->tmps_ix = -2;
724
725	/* stacklevel changed? if yes, grab the stack for us! */
726	if (flags & TRANSFER_SAVE_CCTXT)
727	{
728	if (!prev->stack)
729	allocate_stack (prev, 0);
730	else if (prev->cursp != stacklevel
731	&& prev->stack->usecnt > 1)
732	{
733	prev->gencnt = ++prev->stack->gencnt;
734	prev->stack->usecnt = 1;
735	}
736
737	/* has our stack been invalidated? */
738	if (next->stack && next->stack->gencnt != next->gencnt)
739	{
740	deallocate_stack (next);
741	allocate_stack (next, 1);
742	coro_create (&(next->stack->cctx),
743	continue_coro, (void *)next,
744	next->stack->sptr, labs (next->stack->ssize));
745	}
746
747	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
748	prev->cursp = stacklevel;
749	/* don't add any code here */
750	}
751	else
752	next->cursp = stacklevel;
753	}
754	else if (next->tmps_ix == -2)
755	croak ("tried to transfer to running coroutine");
756	else
757	{
758	LOCK;
759	SAVE (prev, -1); /* first get rid of the old state */
760	UNLOCK;
761
762	if (flags & TRANSFER_SAVE_CCTXT)
763	{
764	if (!prev->stack)
765	allocate_stack (prev, 0);
766
767	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
768	{
769	PL_top_env = &next->start_env;
770
771	setup_coro (next);
772	next->cursp = stacklevel;
773
774	prev->stack->refcnt++;
775	prev->stack->usecnt++;
776	next->stack = prev->stack;
777	next->gencnt = prev->gencnt;
778	}
779	else
780	{
781	assert (!next->stack);
782	allocate_stack (next, 1);
783	coro_create (&(next->stack->cctx),
784	setup_coro, (void *)next,
785	next->stack->sptr, labs (next->stack->ssize));
786	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
787	prev->cursp = stacklevel;
788	/* don't add any code here */
789	}
790	}
791	else
792	{
793	setup_coro (next);
794	next->cursp = stacklevel;
795	}
796	}
797	}
798
799	LOCK;
800	if (coro_mortal)	569	if (coro_mortal)
801	{	570	{
802	SvREFCNT_dec (coro_mortal);	571	SvREFCNT_dec (coro_mortal);
803	coro_mortal = 0;	572	coro_mortal = 0;
804	}	573	}
		574	}
		575
		576	static void
		577	coro_run (void *arg)
		578	{
		579	/*
		580	* this is a _very_ stripped down perl interpreter ;)
		581	*/
		582	dTHX;
		583	int ret;
		584
805	UNLOCK;	585	UNLOCK;
806	}
807		586
808	#define SV_CORO(sv,func) \	587	PL_top_env = &PL_start_env;
809	do { \
810	if (SvROK (sv)) \
811	sv = SvRV (sv); \
812	\
813	if (SvTYPE (sv) == SVt_PVHV) \
814	{ \
815	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
816	\
817	if (!he) \
818	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
819	\
820	(sv) = SvRV (HeVAL(he)); \
821	} \
822	\
823	/* must also be changed inside Coro::Cont::yield */ \
824	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
825	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
826	\
827	} while(0)
828		588
829	#define SvSTATE(sv) (struct coro *)SvIV (sv)	589	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
		590	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
830		591
		592	/* continue at cctx_init, without entersub */
		593	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
		594
		595	/* somebody will hit me for both perl_run and PL_restartop */
		596	ret = perl_run (PERL_GET_CONTEXT);
		597	printf ("ret %d\n", ret);//D
		598
		599	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
		600	abort ();
		601	}
		602
		603	static coro_stack *
		604	stack_new ()
		605	{
		606	coro_stack *stack;
		607
		608	New (0, stack, 1, coro_stack);
		609
		610	#if HAVE_MMAP
		611
		612	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		613	/* mmap suppsedly does allocate-on-write for us */
		614	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		615
		616	if (stack->sptr == (void *)-1)
		617	{
		618	perror ("FATAL: unable to mmap stack for coroutine");
		619	_exit (EXIT_FAILURE);
		620	}
		621
		622	# if STACKGUARD
		623	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		624	# endif
		625
		626	#else
		627
		628	stack->ssize = STACKSIZE * (long)sizeof (long);
		629	New (0, stack->sptr, STACKSIZE, long);
		630
		631	if (!stack->sptr)
		632	{
		633	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		634	_exit (EXIT_FAILURE);
		635	}
		636
		637	#endif
		638
		639	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		640
		641	return stack;
		642	}
		643
		644	static void
		645	stack_free (coro_stack *stack)
		646	{
		647	if (!stack)
		648	return;
		649
		650	#if HAVE_MMAP
		651	munmap (stack->sptr, stack->ssize);
		652	#else
		653	Safefree (stack->sptr);
		654	#endif
		655
		656	Safefree (stack);
		657	}
		658
		659	static coro_stack *stack_first;
		660
		661	static coro_stack *
		662	stack_get ()
		663	{
		664	coro_stack *stack;
		665
		666	if (stack_first)
		667	{
		668	stack = stack_first;
		669	stack_first = stack->next;
		670	}
		671	else
		672	{
		673	stack = stack_new ();
		674	PL_op = PL_op->op_next;
		675	}
		676
		677	return stack;
		678	}
		679
		680	static void
		681	stack_put (coro_stack *stack)
		682	{
		683	stack->next = stack_first;
		684	stack_first = stack;
		685	}
		686
		687	/* never call directly, always through the coro_state_transfer global variable */
		688	static void
		689	transfer_impl (struct coro *prev, struct coro *next, int flags)
		690	{
		691	dSTACKLEVEL;
		692
		693	/* sometimes transfer is only called to set idle_sp */
		694	if (flags == TRANSFER_SET_STACKLEVEL)
		695	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		696	else if (prev != next)
		697	{
		698	coro_stack *prev__stack;
		699
		700	LOCK;
		701
		702	if (next->mainstack)
		703	{
		704	/* coroutine already started */
		705	SAVE (prev, flags);
		706	LOAD (next);
		707	}
		708	else
		709	{
		710	/* need to start coroutine */
		711	/* first get rid of the old state */
		712	SAVE (prev, -1);
		713	/* setup coroutine call */
		714	setup_coro (next);
		715	/* need a stack */
		716	next->stack = 0;
		717	}
		718
		719	if (!prev->stack)
		720	/* create a new empty context */
		721	Newz (0, prev->stack, 1, coro_stack);
		722
		723	prev__stack = prev->stack;
		724
		725	/* possibly "free" the stack */
		726	if (prev__stack->idle_sp == STACKLEVEL)
		727	{
		728	stack_put (prev__stack);
		729	prev->stack = 0;
		730	}
		731
		732	if (!next->stack)
		733	next->stack = stack_get ();
		734
		735	if (prev__stack != next->stack)
		736	{
		737	prev__stack->top_env = PL_top_env;
		738	PL_top_env = next->stack->top_env;
		739	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		740	}
		741
		742	free_coro_mortal ();
		743
		744	UNLOCK;
		745	}
		746	}
		747
		748	/* use this function pointer to call the above function */
		749	/* this is done to increase chances of the compiler not inlining the call */
		750	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
		751	void (*coro_state_transfer)(struct coro *prev, struct coro *next, int flags) = transfer_impl;
		752
		753	struct transfer_args
		754	{
		755	struct coro *prev, *next;
		756	int flags;
		757	};
		758
		759	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
		760
		761	static void
		762	coro_state_destroy (struct coro *coro)
		763	{
		764	if (coro->refcnt--)
		765	return;
		766
		767	if (coro->mainstack && coro->mainstack != main_mainstack)
		768	{
		769	struct coro temp;
		770
		771	SAVE ((&temp), TRANSFER_SAVE_ALL);
		772	LOAD (coro);
		773
		774	destroy_stacks ();
		775
		776	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		777
		778	coro->mainstack = 0;
		779	}
		780
		781	stack_free (coro->stack);
		782	SvREFCNT_dec (coro->args);
		783	Safefree (coro);
		784	}
		785
831	static void	786	static int
		787	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		788	{
		789	struct coro *coro = (struct coro *)mg->mg_ptr;
		790	mg->mg_ptr = 0;
		791
		792	coro_state_destroy (coro);
		793
		794	return 0;
		795	}
		796
		797	static int
		798	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		799	{
		800	struct coro *coro = (struct coro *)mg->mg_ptr;
		801
		802	++coro->refcnt;
		803
		804	return 0;
		805	}
		806
		807	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
		808
		809	static struct coro *
		810	SvSTATE (SV *coro)
		811	{
		812	HV *stash;
		813	MAGIC *mg;
		814
		815	if (SvROK (coro))
		816	coro = SvRV (coro);
		817
		818	stash = SvSTASH (coro);
		819	if (stash != coro_stash && stash != coro_state_stash)
		820	{
		821	/* very slow, but rare, check */
		822	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		823	croak ("Coro::State object required");
		824	}
		825
		826	mg = SvMAGIC (coro);
		827	assert (mg->mg_type == PERL_MAGIC_ext);
		828	return (struct coro *)mg->mg_ptr;
		829	}
		830
		831	static void
		832	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		833	{
		834	ta->prev = SvSTATE (prev);
		835	ta->next = SvSTATE (next);
		836	ta->flags = flags;
		837	}
		838
		839	static void
832	api_transfer(pTHX_ SV *prev, SV *next, int flags)	840	api_transfer (SV *prev, SV *next, int flags)
833	{	841	{
834	SV_CORO (prev, "Coro::transfer");	842	dTHX;
835	SV_CORO (next, "Coro::transfer");	843	struct transfer_args ta;
836		844
837	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	845	prepare_transfer (&ta, prev, next, flags);
		846	TRANSFER (ta);
838	}	847	}
839		848
840	/** Coro ********************************************************************/	849	/** Coro ********************************************************************/
841		850
842	#define PRIO_MAX 3	851	#define PRIO_MAX 3
…		…
846	#define PRIO_IDLE -3	855	#define PRIO_IDLE -3
847	#define PRIO_MIN -4	856	#define PRIO_MIN -4
848		857
849	/* for Coro.pm */	858	/* for Coro.pm */
850	static GV *coro_current, *coro_idle;	859	static GV *coro_current, *coro_idle;
851	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	860	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
852	static int coro_nready;	861	static int coro_nready;
853		862
854	static void	863	static void
855	coro_enq (pTHX_ SV *sv)	864	coro_enq (SV *sv)
856	{	865	{
		866	int prio;
		867
857	if (SvTYPE (sv) == SVt_PVHV)	868	if (SvTYPE (sv) != SVt_PVHV)
858	{
859	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
860	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
861
862	prio = prio > PRIO_MAX ? PRIO_MAX
863	: prio < PRIO_MIN ? PRIO_MIN
864	: prio;
865
866	av_push (coro_ready [prio - PRIO_MIN], sv);
867	coro_nready++;
868
869	return;
870	}
871
872	croak ("Coro::ready tried to enqueue something that is not a coroutine");	869	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		870
		871	prio = SvSTATE (sv)->prio;
		872
		873	av_push (coro_ready [prio - PRIO_MIN], sv);
		874	coro_nready++;
873	}	875	}
874		876
875	static SV *	877	static SV *
876	coro_deq (pTHX_ int min_prio)	878	coro_deq (int min_prio)
877	{	879	{
878	int prio = PRIO_MAX - PRIO_MIN;	880	int prio = PRIO_MAX - PRIO_MIN;
879		881
880	min_prio -= PRIO_MIN;	882	min_prio -= PRIO_MIN;
881	if (min_prio < 0)	883	if (min_prio < 0)
882	min_prio = 0;	884	min_prio = 0;
883		885
884	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	886	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
885	if (av_len (coro_ready[prio]) >= 0)	887	if (AvFILLp (coro_ready [prio]) >= 0)
886	{	888	{
887	coro_nready--;	889	coro_nready--;
888	return av_shift (coro_ready[prio]);	890	return av_shift (coro_ready [prio]);
889	}	891	}
890		892
891	return 0;	893	return 0;
892	}	894	}
893		895
…		…
898		900
899	if (SvROK (coro))	901	if (SvROK (coro))
900	coro = SvRV (coro);	902	coro = SvRV (coro);
901		903
902	LOCK;	904	LOCK;
903	coro_enq (aTHX_ SvREFCNT_inc (coro));	905	coro_enq (SvREFCNT_inc (coro));
904	UNLOCK;	906	UNLOCK;
905	}	907	}
906		908
907	static void	909	static void
		910	prepare_schedule (struct transfer_args *ta)
		911	{
		912	SV *current, *prev, *next;
		913
		914	LOCK;
		915
		916	current = GvSV (coro_current);
		917
		918	for (;;)
		919	{
		920	LOCK;
		921
		922	next = coro_deq (PRIO_MIN);
		923
		924	if (next)
		925	break;
		926
		927	UNLOCK;
		928
		929	{
		930	dSP;
		931
		932	ENTER;
		933	SAVETMPS;
		934
		935	PUSHMARK (SP);
		936	PUTBACK;
		937	call_sv (GvSV (coro_idle), G_DISCARD);
		938
		939	FREETMPS;
		940	LEAVE;
		941	}
		942	}
		943
		944	prev = SvRV (current);
		945	SvRV (current) = next;
		946
		947	/* free this only after the transfer */
		948	free_coro_mortal ();
		949	coro_mortal = prev;
		950
		951	ta->prev = SvSTATE (prev);
		952	ta->next = SvSTATE (next);
		953	ta->flags = TRANSFER_SAVE_ALL;
		954
		955	UNLOCK;
		956	}
		957
		958	static void
		959	prepare_cede (struct transfer_args *ta)
		960	{
		961	LOCK;
		962	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		963	UNLOCK;
		964
		965	prepare_schedule (ta);
		966	}
		967
		968	static void
908	api_schedule (void)	969	api_schedule (void)
909	{	970	{
910	dTHX;	971	dTHX;
		972	struct transfer_args ta;
911		973
912	SV *prev, *next;	974	prepare_schedule (&ta);
913		975	TRANSFER (ta);
914	LOCK;
915
916	prev = SvRV (GvSV (coro_current));
917	next = coro_deq (aTHX_ PRIO_MIN);
918
919	if (!next)
920	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
921
922	/* free this only after the transfer */
923	coro_mortal = prev;
924	SV_CORO (prev, "Coro::schedule");
925
926	SvRV (GvSV (coro_current)) = next;
927
928	SV_CORO (next, "Coro::schedule");
929
930	UNLOCK;
931
932	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
933	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
934	}	976	}
935		977
936	static void	978	static void
937	api_cede (void)	979	api_cede (void)
938	{	980	{
939	dTHX;	981	dTHX;
		982	struct transfer_args ta;
940		983
941	LOCK;	984	prepare_cede (&ta);
942	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	985	TRANSFER (ta);
943	UNLOCK;
944
945	api_schedule ();
946	}	986	}
947		987
948	MODULE = Coro::State PACKAGE = Coro::State	988	MODULE = Coro::State PACKAGE = Coro::State
949		989
950	PROTOTYPES: ENABLE	990	PROTOTYPES: DISABLE
951		991
952	BOOT:	992	BOOT:
953	{ /* {} necessary for stoopid perl-5.6.x */	993	{
954	#ifdef USE_ITHREADS	994	#ifdef USE_ITHREADS
955	MUTEX_INIT (&coro_mutex);	995	MUTEX_INIT (&coro_mutex);
956	#endif	996	#endif
		997	BOOT_PAGESIZE;
957		998
958	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
959	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
960	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	999	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
961		1000
962	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1001	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
963	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1002	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
964	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1003	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
965	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
966		1004
967	main_mainstack = PL_mainstack;	1005	main_mainstack = PL_mainstack;
968		1006
969	coroapi.ver = CORO_API_VERSION;	1007	coroapi.ver = CORO_API_VERSION;
970	coroapi.transfer = api_transfer;	1008	coroapi.transfer = api_transfer;
971	}
972		1009
973	Coro::State	1010	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
974	_newprocess(args)	1011	}
975	SV * args	1012
976	PROTOTYPE: $	1013	SV *
		1014	new (char *klass, ...)
977	CODE:	1015	CODE:
978	Coro__State coro;	1016	{
		1017	struct coro *coro;
		1018	HV *hv;
		1019	int i;
979		1020
980	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
981	croak ("Coro::State::_newprocess expects an arrayref");
982
983	Newz (0, coro, 1, struct coro);	1021	Newz (0, coro, 1, struct coro);
		1022	coro->args = newAV ();
984		1023
985	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1024	hv = newHV ();
		1025	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1026	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1027
		1028	for (i = 1; i < items; i++)
		1029	av_push (coro->args, newSVsv (ST (i)));
		1030
986	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1031	/*coro->mainstack = 0; *//*actual work is done inside transfer */
987	/*coro->stack = 0;*/	1032	/*coro->stack = 0;*/
988		1033	}
989	/* same as JMPENV_BOOTSTRAP */
990	/* we might be able to recycle start_env, but safe is safe */
991	/*Zero(&coro->start_env, 1, JMPENV);*/
992	coro->start_env.je_ret = -1;
993	coro->start_env.je_mustcatch = TRUE;
994
995	RETVAL = coro;
996	OUTPUT:	1034	OUTPUT:
997	RETVAL	1035	RETVAL
998		1036
999	void	1037	void
1000	transfer(prev, next, flags)	1038	_set_stacklevel (...)
1001	SV *prev	1039	ALIAS:
1002	SV *next	1040	Coro::State::transfer = 1
1003	int flags	1041	Coro::schedule = 2
1004	PROTOTYPE: @	1042	Coro::cede = 3
		1043	Coro::Cont::yield = 4
1005	CODE:	1044	CODE:
1006	PUTBACK;	1045	{
1007	SV_CORO (next, "Coro::transfer");	1046	struct transfer_args ta;
1008	SV_CORO (prev, "Coro::transfer");	1047
1009	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1048	switch (ix)
1010	SPAGAIN;	1049	{
		1050	case 0:
		1051	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
		1052	ta.next = 0;
		1053	ta.flags = TRANSFER_SET_STACKLEVEL;
		1054	break;
		1055
		1056	case 1:
		1057	if (items != 3)
		1058	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1059
		1060	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1061	break;
		1062
		1063	case 2:
		1064	prepare_schedule (&ta);
		1065	break;
		1066
		1067	case 3:
		1068	prepare_cede (&ta);
		1069	break;
		1070
		1071	case 4:
		1072	{
		1073	SV *yieldstack;
		1074	SV *sv;
		1075	AV *defav = GvAV (PL_defgv);
		1076
		1077	yieldstack = *hv_fetch (
		1078	(HV *)SvRV (GvSV (coro_current)),
		1079	"yieldstack", sizeof ("yieldstack") - 1,
		1080	0
		1081	);
		1082
		1083	/* set up @_ -- ugly */
		1084	av_clear (defav);
		1085	av_fill (defav, items - 1);
		1086	while (items--)
		1087	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1088
		1089	sv = av_pop ((AV *)SvRV (yieldstack));
		1090	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1091	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1092	ta.flags = 0;
		1093	SvREFCNT_dec (sv);
		1094	}
		1095	break;
		1096
		1097	}
		1098
		1099	TRANSFER (ta);
		1100	}
1011		1101
1012	void	1102	void
1013	DESTROY(coro)	1103	_clone_state_from (SV *dst, SV *src)
1014	Coro::State coro	1104	CODE:
1015	CODE:	1105	{
		1106	struct coro *coro_src = SvSTATE (src);
1016		1107
1017	if (coro->mainstack && coro->mainstack != main_mainstack)	1108	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1018	{
1019	struct coro temp;
1020		1109
1021	PUTBACK;	1110	++coro_src->refcnt;
1022	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1111	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1023	LOAD (aTHX_ coro);	1112	}
1024	SPAGAIN;
1025
1026	destroy_stacks (aTHX);
1027
1028	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1029	SPAGAIN;
1030
1031	coro->mainstack = 0;
1032	}
1033
1034	deallocate_stack (coro);
1035	SvREFCNT_dec (coro->args);
1036	Safefree (coro);
1037		1113
1038	void	1114	void
		1115	_nonlocal_goto (IV nextop)
		1116	CODE:
		1117	/* uuh, somebody will kill me again for this */
		1118	PL_op->op_next = INT2PTR (OP *, nextop);
		1119
		1120	void
1039	_exit(code)	1121	_exit (code)
1040	int code	1122	int code
1041	PROTOTYPE: $	1123	PROTOTYPE: $
1042	CODE:	1124	CODE:
1043	_exit (code);	1125	_exit (code);
1044		1126
1045	MODULE = Coro::State PACKAGE = Coro::Cont
1046
1047	# this is slightly dirty (should expose a c-level api)
1048
1049	void
1050	yield(...)
1051	PROTOTYPE: @
1052	CODE:
1053	static SV *returnstk;
1054	SV *sv;
1055	AV *defav = GvAV (PL_defgv);
1056	struct coro *prev, *next;
1057
1058	if (!returnstk)
1059	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1060
1061	/* set up @_ -- ugly */
1062	av_clear (defav);
1063	av_fill (defav, items - 1);
1064	while (items--)
1065	av_store (defav, items, SvREFCNT_inc (ST(items)));
1066
1067	SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1068	sv = av_pop ((AV *)SvRV (returnstk));
1069	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1070	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1071	SvREFCNT_dec (sv);
1072
1073	transfer (aTHX_ prev, next, 0);
1074
1075	MODULE = Coro::State PACKAGE = Coro	1127	MODULE = Coro::State PACKAGE = Coro
1076		1128
1077	# this is slightly dirty (should expose a c-level api)
1078
1079	BOOT:	1129	BOOT:
1080	{	1130	{
1081	int i;	1131	int i;
		1132
1082	HV *stash = gv_stashpv ("Coro", TRUE);	1133	coro_stash = gv_stashpv ("Coro", TRUE);
1083		1134
1084	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1135	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1085	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1136	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1086	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1137	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1087	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1138	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1088	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1139	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1089	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1140	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1090		1141
1091	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1142	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1092	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1143	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1093		1144
1094	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1145	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1102	coroapi.ready = api_ready;	1153	coroapi.ready = api_ready;
1103	coroapi.nready = &coro_nready;	1154	coroapi.nready = &coro_nready;
1104	coroapi.current = coro_current;	1155	coroapi.current = coro_current;
1105		1156
1106	GCoroAPI = &coroapi;	1157	GCoroAPI = &coroapi;
1107	sv_setiv(sv, (IV)&coroapi);	1158	sv_setiv (sv, (IV)&coroapi);
1108	SvREADONLY_on(sv);	1159	SvREADONLY_on (sv);
1109	}	1160	}
1110	}	1161	}
1111		1162
1112	#if !PERL_MICRO	1163	int
		1164	prio (Coro::State coro, int newprio = 0)
		1165	ALIAS:
		1166	nice = 1
		1167	CODE:
		1168	{
		1169	RETVAL = coro->prio;
		1170
		1171	if (items > 1)
		1172	{
		1173	if (ix)
		1174	newprio += coro->prio;
		1175
		1176	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1177	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1178
		1179	coro->prio = newprio;
		1180	}
		1181	}
1113		1182
1114	void	1183	void
1115	ready(self)	1184	ready (SV *self)
1116	SV * self
1117	PROTOTYPE: $	1185	PROTOTYPE: $
1118	CODE:	1186	CODE:
1119	api_ready (self);	1187	api_ready (self);
1120		1188
1121	#endif
1122
1123	int	1189	int
1124	nready(...)	1190	nready (...)
1125	PROTOTYPE:	1191	PROTOTYPE:
1126	CODE:	1192	CODE:
1127	RETVAL = coro_nready;	1193	RETVAL = coro_nready;
1128	OUTPUT:	1194	OUTPUT:
1129	RETVAL	1195	RETVAL
1130		1196
		1197	MODULE = Coro::State PACKAGE = Coro::AIO
		1198
		1199	SV *
		1200	_get_state ()
		1201	CODE:
		1202	{
		1203	struct {
		1204	int errorno;
		1205	int laststype;
		1206	int laststatval;
		1207	Stat_t statcache;
		1208	} data;
		1209
		1210	data.errorno = errno;
		1211	data.laststype = PL_laststype;
		1212	data.laststatval = PL_laststatval;
		1213	data.statcache = PL_statcache;
		1214
		1215	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1216	}
		1217	OUTPUT:
		1218	RETVAL
		1219
1131	void	1220	void
1132	schedule(...)	1221	_set_state (char *data_)
1133	PROTOTYPE:	1222	PROTOTYPE: $
1134	CODE:	1223	CODE:
1135	api_schedule ();	1224	{
		1225	struct {
		1226	int errorno;
		1227	int laststype;
		1228	int laststatval;
		1229	Stat_t statcache;
		1230	} *data = (void *)data_;
1136		1231
1137	void	1232	errno = data->errorno;
1138	cede(...)	1233	PL_laststype = data->laststype;
1139	PROTOTYPE:	1234	PL_laststatval = data->laststatval;
1140	CODE:	1235	PL_statcache = data->statcache;
1141	api_cede ();	1236	}
1142

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