ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.67 by root, Mon Dec 12 20:07:44 2005 UTC vs.
Revision 1.101 by root, Mon Nov 27 00:08:18 2006 UTC

1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	// threaded perls might need much more, 65536 or more,	9	#define PERL_VERSION_ATLEAST(a,b,c) \
12	// which is 0.5 to 1MB	10	(PERL_REVISION > (a) \
13	#define STACKSIZE 16384	11	|| (PERL_REVISION == (a) \
		12	&& (PERL_VERSION > (b) \
		13	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
14		14
15	#if PERL_VERSION < 6	15	#if !PERL_VERSION_ATLEAST (5,8,0)
16	# ifndef PL_ppaddr	16	# ifndef PL_ppaddr
17	# define PL_ppaddr ppaddr	17	# define PL_ppaddr ppaddr
18	# endif	18	# endif
19	# ifndef call_sv	19	# ifndef call_sv
20	# define call_sv perl_call_sv	20	# define call_sv perl_call_sv
…		…
31	# ifndef IS_PADCONST	31	# ifndef IS_PADCONST
32	# define IS_PADCONST(v) 0	32	# define IS_PADCONST(v) 0
33	# endif	33	# endif
34	#endif	34	#endif
35		35
36	#include <signal.h>	36	#include <stdio.h>
		37	#include <errno.h>
		38
		39	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		40	# undef STACKGUARD
		41	#endif
		42
		43	#ifndef STACKGUARD
		44	# define STACKGUARD 0
		45	#endif
37		46
38	#ifdef HAVE_MMAP	47	#ifdef HAVE_MMAP
39	# include <unistd.h>	48	# include <unistd.h>
40	# include <sys/mman.h>	49	# include <sys/mman.h>
41	# ifndef MAP_ANONYMOUS	50	# ifndef MAP_ANONYMOUS
…		…
43	# define MAP_ANONYMOUS MAP_ANON	52	# define MAP_ANONYMOUS MAP_ANON
44	# else	53	# else
45	# undef HAVE_MMAP	54	# undef HAVE_MMAP
46	# endif	55	# endif
47	# endif	56	# endif
		57	# include <limits.h>
		58	# ifndef PAGESIZE
		59	# define PAGESIZE pagesize
		60	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		61	static long pagesize;
		62	# else
		63	# define BOOT_PAGESIZE
48	#endif	64	# endif
49		65	#endif
50	#define SUB_INIT "Coro::State::initialize"
51	#define UCORO_STATE "_coro_state"
52		66
53	/* The next macro should declare a variable stacklevel that contains and approximation	67	/* The next macro should declare a variable stacklevel that contains and approximation
54	* to the current C stack pointer. Its property is that it changes with each call	68	* to the current C stack pointer. Its property is that it changes with each call
55	* and should be unique. */	69	* and should be unique. */
		70	#define dSTACKLEVEL int stacklevel
56	#define dSTACKLEVEL void *stacklevel = &stacklevel	71	#define STACKLEVEL ((void *)&stacklevel)
57		72
58	#define IN_DESTRUCT (PL_main_cv == Nullcv)	73	#define IN_DESTRUCT (PL_main_cv == Nullcv)
59		74
60	#define labs(l) ((l) >= 0 ? (l) : -(l))	75	#if __GNUC__ >= 3
		76	# define attribute(x) __attribute__(x)
		77	#else
		78	# define attribute(x)
		79	#endif
		80
		81	#define NOINLINE attribute ((noinline))
61		82
62	#include "CoroAPI.h"	83	#include "CoroAPI.h"
		84
		85	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
63		86
64	#ifdef USE_ITHREADS	87	#ifdef USE_ITHREADS
65	static perl_mutex coro_mutex;	88	static perl_mutex coro_mutex;
66	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	89	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
67	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	90	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
68	#else	91	#else
69	# define LOCK 0	92	# define LOCK (void)0
70	# define UNLOCK 0	93	# define UNLOCK (void)0
71	#endif	94	#endif
72		95
73	static struct CoroAPI coroapi;	96	static struct CoroAPI coroapi;
74	static AV *main_mainstack; /* used to differentiate between $main and others */	97	static AV *main_mainstack; /* used to differentiate between $main and others */
75	static HV *coro_state_stash;	98	static HV *coro_state_stash, *coro_stash;
76	static SV *ucoro_state_sv;
77	static U32 ucoro_state_hash;
78	static SV *coro_mortal; /* will be freed after next transfer */	99	static SV *coro_mortal; /* will be freed after next transfer */
79		100
80	/* this is actually not only the c stack but also c registers etc... */	101	/* this is a structure representing a c-level coroutine */
81	typedef struct {	102	typedef struct coro_stack {
82	int refcnt; /* pointer reference counter */	103	struct coro_stack *next;
83	int usecnt; /* shared by how many coroutines */
84	int gencnt; /* generation counter */
85		104
86	coro_context cctx;	105	/* the stack */
87
88	void *sptr;	106	void *sptr;
89	long ssize; /* positive == mmap, otherwise malloc */	107	long ssize; /* positive == mmap, otherwise malloc */
		108
		109	/* cpu state */
		110	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		111	JMPENV *top_env;
		112	coro_context cctx;
90	} coro_stack;	113	} coro_stack;
91		114
		115	/* this is a structure representing a perl-level coroutine */
92	struct coro {	116	struct coro {
93	/* the top-level JMPENV for each coroutine, needed to catch dies. */	117	/* the c coroutine allocated to this perl coroutine, if any */
94	JMPENV start_env;
95
96	/* the optional C context */
97	coro_stack *stack;	118	coro_stack *stack;
98	void *cursp;	119
		120	/* data associated with this coroutine (initial args) */
		121	AV *args;
99	int gencnt;	122	int refcnt;
100		123
101	/* optionally saved, might be zero */	124	/* optionally saved, might be zero */
102	AV *defav;	125	AV *defav;
103	SV *defsv;	126	SV *defsv;
104	SV *errsv;	127	SV *errsv;
…		…
134	OP **retstack;	157	OP **retstack;
135	I32 retstack_ix;	158	I32 retstack_ix;
136	I32 retstack_max;	159	I32 retstack_max;
137	PMOP *curpm;	160	PMOP *curpm;
138	COP *curcop;	161	COP *curcop;
139	JMPENV *top_env;
140		162
141	/* data associated with this coroutine (initial args) */	163	/* coro process data */
142	AV *args;	164	int prio;
143	};	165	};
144		166
145	typedef struct coro *Coro__State;	167	typedef struct coro *Coro__State;
146	typedef struct coro *Coro__State_or_hashref;	168	typedef struct coro *Coro__State_or_hashref;
147		169
148	/* mostly copied from op.c:cv_clone2 */	170	static AV *
149	STATIC AV *	171	coro_clone_padlist (CV *cv)
150	clone_padlist (pTHX_ AV *protopadlist)
151	{	172	{
152	AV *av;	173	AV *padlist = CvPADLIST (cv);
153	I32 ix;
154	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
155	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
156	SV **pname = AvARRAY (protopad_name);
157	SV **ppad = AvARRAY (protopad);
158	I32 fname = AvFILLp (protopad_name);
159	I32 fpad = AvFILLp (protopad);
160	AV *newpadlist, *newpad_name, *newpad;	174	AV *newpadlist, *newpad;
161	SV **npad;
162
163	newpad_name = newAV ();
164	for (ix = fname; ix >= 0; ix--)
165	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
166
167	newpad = newAV ();
168	av_fill (newpad, AvFILLp (protopad));
169	npad = AvARRAY (newpad);
170		175
171	newpadlist = newAV ();	176	newpadlist = newAV ();
172	AvREAL_off (newpadlist);	177	AvREAL_off (newpadlist);
173	av_store (newpadlist, 0, (SV *) newpad_name);	178	#if PERL_VERSION_ATLEAST (5,9,0)
		179	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		180	#else
		181	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		182	#endif
		183	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		184	--AvFILLp (padlist);
		185
		186	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
174	av_store (newpadlist, 1, (SV *) newpad);	187	av_store (newpadlist, 1, (SV *)newpad);
175
176	av = newAV (); /* will be @_ */
177	av_extend (av, 0);
178	av_store (newpad, 0, (SV *) av);
179	AvFLAGS (av) = AVf_REIFY;
180
181	for (ix = fpad; ix > 0; ix--)
182	{
183	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
184
185	if (namesv && namesv != &PL_sv_undef)
186	{
187	char *name = SvPVX (namesv); /* XXX */
188
189	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
190	{ /* lexical from outside? */
191	npad[ix] = SvREFCNT_inc (ppad[ix]);
192	}
193	else
194	{ /* our own lexical */
195	SV *sv;
196	if (*name == '&')
197	sv = SvREFCNT_inc (ppad[ix]);
198	else if (*name == '@')
199	sv = (SV *) newAV ();
200	else if (*name == '%')
201	sv = (SV *) newHV ();
202	else
203	sv = NEWSV (0, 0);
204
205	#ifdef SvPADBUSY
206	if (!SvPADBUSY (sv))
207	#endif
208	SvPADMY_on (sv);
209
210	npad[ix] = sv;
211	}
212	}
213	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
214	{
215	npad[ix] = SvREFCNT_inc (ppad[ix]);
216	}
217	else
218	{
219	SV *sv = NEWSV (0, 0);
220	SvPADTMP_on (sv);
221	npad[ix] = sv;
222	}
223	}
224
225	#if 0 /* return -ENOTUNDERSTOOD */
226	/* Now that vars are all in place, clone nested closures. */
227
228	for (ix = fpad; ix > 0; ix--) {
229	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
230	if (namesv
231	&& namesv != &PL_sv_undef
232	&& !(SvFLAGS(namesv) & SVf_FAKE)
233	&& *SvPVX(namesv) == '&'
234	&& CvCLONE(ppad[ix]))
235	{
236	CV *kid = cv_clone((CV*)ppad[ix]);
237	SvREFCNT_dec(ppad[ix]);
238	CvCLONE_on(kid);
239	SvPADMY_on(kid);
240	npad[ix] = (SV*)kid;
241	}
242	}
243	#endif
244		188
245	return newpadlist;	189	return newpadlist;
246	}	190	}
247		191
248	STATIC void	192	static void
249	free_padlist (pTHX_ AV *padlist)	193	free_padlist (AV *padlist)
250	{	194	{
251	/* may be during global destruction */	195	/* may be during global destruction */
252	if (SvREFCNT (padlist))	196	if (SvREFCNT (padlist))
253	{	197	{
254	I32 i = AvFILLp (padlist);	198	I32 i = AvFILLp (padlist);
…		…
267		211
268	SvREFCNT_dec ((SV*)padlist);	212	SvREFCNT_dec ((SV*)padlist);
269	}	213	}
270	}	214	}
271		215
272	STATIC int	216	static int
273	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	217	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
274	{	218	{
275	AV *padlist;	219	AV *padlist;
276	AV *av = (AV *)mg->mg_obj;	220	AV *av = (AV *)mg->mg_obj;
277		221
278	/* casting is fun. */	222	/* casting is fun. */
279	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	223	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
280	free_padlist (aTHX_ padlist);	224	free_padlist (padlist);
281		225
282	SvREFCNT_dec (av);	226	SvREFCNT_dec (av);
		227
		228	return 0;
283	}	229	}
284		230
285	#define PERL_MAGIC_coro PERL_MAGIC_ext	231	#define PERL_MAGIC_coro PERL_MAGIC_ext
286		232
287	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	233	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
288		234
289	/* the next two functions merely cache the padlists */	235	/* the next two functions merely cache the padlists */
290	STATIC void	236	static void
291	get_padlist (pTHX_ CV *cv)	237	get_padlist (CV *cv)
292	{	238	{
293	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	239	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
294		240
295	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
296	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	242	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
297	else	243	else
		244	{
		245	#if 0
		246	/* this is probably cleaner, but also slower? */
		247	CV *cp = Perl_cv_clone (cv);
		248	CvPADLIST (cv) = CvPADLIST (cp);
		249	CvPADLIST (cp) = 0;
		250	SvREFCNT_dec (cp);
		251	#else
298	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	252	CvPADLIST (cv) = coro_clone_padlist (cv);
		253	#endif
		254	}
299	}	255	}
300		256
301	STATIC void	257	static void
302	put_padlist (pTHX_ CV *cv)	258	put_padlist (CV *cv)
303	{	259	{
304	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	260	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
305		261
306	if (!mg)	262	if (!mg)
307	{	263	{
…		…
315	}	271	}
316		272
317	#define SB do {	273	#define SB do {
318	#define SE } while (0)	274	#define SE } while (0)
319		275
320	#define LOAD(state) load_state(aTHX_ (state));	276	#define LOAD(state) load_state((state));
321	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	277	#define SAVE(state,flags) save_state((state),(flags));
322		278
323	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	279	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
324		280
325	static void	281	static void
326	load_state(pTHX_ Coro__State c)	282	load_state(Coro__State c)
327	{	283	{
328	PL_dowarn = c->dowarn;	284	PL_dowarn = c->dowarn;
329	PL_in_eval = c->in_eval;	285	PL_in_eval = c->in_eval;
330		286
331	PL_curstackinfo = c->curstackinfo;	287	PL_curstackinfo = c->curstackinfo;
…		…
349	PL_scopestack_ix = c->scopestack_ix;	305	PL_scopestack_ix = c->scopestack_ix;
350	PL_scopestack_max = c->scopestack_max;	306	PL_scopestack_max = c->scopestack_max;
351	PL_savestack = c->savestack;	307	PL_savestack = c->savestack;
352	PL_savestack_ix = c->savestack_ix;	308	PL_savestack_ix = c->savestack_ix;
353	PL_savestack_max = c->savestack_max;	309	PL_savestack_max = c->savestack_max;
		310	#if !PERL_VERSION_ATLEAST (5,9,0)
354	PL_retstack = c->retstack;	311	PL_retstack = c->retstack;
355	PL_retstack_ix = c->retstack_ix;	312	PL_retstack_ix = c->retstack_ix;
356	PL_retstack_max = c->retstack_max;	313	PL_retstack_max = c->retstack_max;
		314	#endif
357	PL_curpm = c->curpm;	315	PL_curpm = c->curpm;
358	PL_curcop = c->curcop;	316	PL_curcop = c->curcop;
359	PL_top_env = c->top_env;
360		317
361	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
362	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
363	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
364		321
…		…
371	{	328	{
372	AV *padlist = (AV *)POPs;	329	AV *padlist = (AV *)POPs;
373		330
374	if (padlist)	331	if (padlist)
375	{	332	{
376	put_padlist (aTHX_ cv); /* mark this padlist as available */	333	put_padlist (cv); /* mark this padlist as available */
377	CvPADLIST(cv) = padlist;	334	CvPADLIST(cv) = padlist;
378	}	335	}
379		336
380	++CvDEPTH(cv);	337	++CvDEPTH(cv);
381	}	338	}
…		…
383	PUTBACK;	340	PUTBACK;
384	}	341	}
385	}	342	}
386		343
387	static void	344	static void
388	save_state(pTHX_ Coro__State c, int flags)	345	save_state(Coro__State c, int flags)
389	{	346	{
390	{	347	{
391	dSP;	348	dSP;
392	I32 cxix = cxstack_ix;	349	I32 cxix = cxstack_ix;
393	PERL_CONTEXT *ccstk = cxstack;	350	PERL_CONTEXT *ccstk = cxstack;
…		…
421	}	378	}
422		379
423	PUSHs ((SV *)CvPADLIST(cv));	380	PUSHs ((SV *)CvPADLIST(cv));
424	PUSHs ((SV *)cv);	381	PUSHs ((SV *)cv);
425		382
426	get_padlist (aTHX_ cv); /* this is a monster */	383	get_padlist (cv);
427	}	384	}
428	}	385	}
429	#ifdef CXt_FORMAT	386	#ifdef CXt_FORMAT
430	else if (CxTYPE(cx) == CXt_FORMAT)	387	else if (CxTYPE(cx) == CXt_FORMAT)
431	{	388	{
…		…
475	c->scopestack_ix = PL_scopestack_ix;	432	c->scopestack_ix = PL_scopestack_ix;
476	c->scopestack_max = PL_scopestack_max;	433	c->scopestack_max = PL_scopestack_max;
477	c->savestack = PL_savestack;	434	c->savestack = PL_savestack;
478	c->savestack_ix = PL_savestack_ix;	435	c->savestack_ix = PL_savestack_ix;
479	c->savestack_max = PL_savestack_max;	436	c->savestack_max = PL_savestack_max;
		437	#if !PERL_VERSION_ATLEAST (5,9,0)
480	c->retstack = PL_retstack;	438	c->retstack = PL_retstack;
481	c->retstack_ix = PL_retstack_ix;	439	c->retstack_ix = PL_retstack_ix;
482	c->retstack_max = PL_retstack_max;	440	c->retstack_max = PL_retstack_max;
		441	#endif
483	c->curpm = PL_curpm;	442	c->curpm = PL_curpm;
484	c->curcop = PL_curcop;	443	c->curcop = PL_curcop;
485	c->top_env = PL_top_env;
486	}	444	}
487		445
488	/*	446	/*
489	* allocate various perl stacks. This is an exact copy	447	* allocate various perl stacks. This is an exact copy
490	* of perl.c:init_stacks, except that it uses less memory	448	* of perl.c:init_stacks, except that it uses less memory
491	* on the (sometimes correct) assumption that coroutines do	449	* on the (sometimes correct) assumption that coroutines do
492	* not usually need a lot of stackspace.	450	* not usually need a lot of stackspace.
493	*/	451	*/
494	STATIC void	452	static void
495	coro_init_stacks (pTHX)	453	coro_init_stacks ()
496	{	454	{
497	LOCK;
498
499	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
500	PL_curstackinfo->si_type = PERLSI_MAIN;	456	PL_curstackinfo->si_type = PERLSI_MAIN;
501	PL_curstack = PL_curstackinfo->si_stack;	457	PL_curstack = PL_curstackinfo->si_stack;
502	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
503		459
…		…
524		480
525	New(54,PL_savestack,96,ANY);	481	New(54,PL_savestack,96,ANY);
526	PL_savestack_ix = 0;	482	PL_savestack_ix = 0;
527	PL_savestack_max = 96;	483	PL_savestack_max = 96;
528		484
		485	#if !PERL_VERSION_ATLEAST (5,9,0)
529	New(54,PL_retstack,8,OP*);	486	New(54,PL_retstack,8,OP*);
530	PL_retstack_ix = 0;	487	PL_retstack_ix = 0;
531	PL_retstack_max = 8;	488	PL_retstack_max = 8;
532		489	#endif
533	UNLOCK;
534	}	490	}
535		491
536	/*	492	/*
537	* destroy the stacks, the callchain etc...	493	* destroy the stacks, the callchain etc...
538	*/	494	*/
539	STATIC void	495	static void
540	destroy_stacks(pTHX)	496	destroy_stacks()
541	{	497	{
542	if (!IN_DESTRUCT)	498	if (!IN_DESTRUCT)
543	{	499	{
544	/* is this ugly, I ask? */	500	/* is this ugly, I ask? */
545	LEAVE_SCOPE (0);	501	LEAVE_SCOPE (0);
…		…
576		532
577	Safefree (PL_tmps_stack);	533	Safefree (PL_tmps_stack);
578	Safefree (PL_markstack);	534	Safefree (PL_markstack);
579	Safefree (PL_scopestack);	535	Safefree (PL_scopestack);
580	Safefree (PL_savestack);	536	Safefree (PL_savestack);
		537	#if !PERL_VERSION_ATLEAST (5,9,0)
581	Safefree (PL_retstack);	538	Safefree (PL_retstack);
582	}
583
584	static void
585	allocate_stack (Coro__State ctx, int alloc)
586	{
587	coro_stack *stack;
588
589	New (0, stack, 1, coro_stack);
590
591	stack->refcnt = 1;
592	stack->usecnt = 1;
593	stack->gencnt = ctx->gencnt = 0;
594
595	if (alloc)
596	{
597	#if HAVE_MMAP
598	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
599	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
600	if (stack->sptr == (void *)-1)
601	#endif	539	#endif
602	{
603	/*FIXME*//*D*//* reasonable stack size! */
604	stack->ssize = - (STACKSIZE * sizeof (long));
605	New (0, stack->sptr, STACKSIZE, long);
606	}
607	}
608	else
609	stack->sptr = 0;
610
611	ctx->stack = stack;
612	}	540	}
613		541
614	static void	542	static void
615	deallocate_stack (Coro__State ctx)	543	setup_coro (struct coro *coro)
616	{
617	coro_stack *stack = ctx->stack;
618
619	ctx->stack = 0;
620
621	if (stack)
622	{
623	if (!--stack->refcnt)
624	{
625	#ifdef HAVE_MMAP
626	if (stack->ssize > 0 && stack->sptr)
627	munmap (stack->sptr, stack->ssize);
628	else
629	#endif
630	Safefree (stack->sptr);
631
632	Safefree (stack);
633	}
634	else if (ctx->gencnt == stack->gencnt)
635	--stack->usecnt;
636	}
637	}
638
639	static void
640	setup_coro (void *arg)
641	{	544	{
642	/*	545	/*
643	* emulate part of the perl startup here.	546	* emulate part of the perl startup here.
644	*/	547	*/
645	dTHX;	548	dTHX;
646	dSP;	549	dSP;
647	Coro__State ctx = (Coro__State)arg;	550	UNOP myop;
648	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);	551	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
649		552
650	coro_init_stacks (aTHX);	553	coro_init_stacks ();
651	/*PL_curcop = 0;*/	554	/*PL_curcop = 0;*/
652	/*PL_in_eval = PL_in_eval;*/ /* inherit */	555	/*PL_in_eval = PL_in_eval;*/ /* inherit */
653	SvREFCNT_dec (GvAV (PL_defgv));	556	SvREFCNT_dec (GvAV (PL_defgv));
654	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	557	GvAV (PL_defgv) = coro->args; coro->args = 0;
655		558
656	SPAGAIN;	559	SPAGAIN;
657		560
658	if (ctx->stack)
659	{
660	ctx->cursp = 0;
661
662	PUSHMARK(SP);
663	PUTBACK;
664	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
665
666	if (SvTRUE (ERRSV))
667	croak (NULL);
668	else
669	croak ("FATAL: CCTXT coroutine returned!");
670	}
671	else
672	{
673	UNOP myop;
674
675	PL_op = (OP *)&myop;
676
677	Zero(&myop, 1, UNOP);	561	Zero (&myop, 1, UNOP);
678	myop.op_next = Nullop;	562	myop.op_next = Nullop;
679	myop.op_flags = OPf_WANT_VOID;	563	myop.op_flags = OPf_WANT_VOID;
680		564
		565	PL_op = (OP *)&myop;
		566
681	PUSHMARK(SP);	567	PUSHMARK(SP);
682	XPUSHs (sub_init);	568	XPUSHs (sub_init);
683	/*
684	* the next line is slightly wrong, as PL_op->op_next
685	* is actually being executed so we skip the first op.
686	* that doesn't matter, though, since it is only
687	* pp_nextstate and we never return...
688	* ah yes, and I don't care anyways ;)
689	*/
690	PUTBACK;	569	PUTBACK;
691	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	570	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
692	SPAGAIN;	571	SPAGAIN;
693		572
694	ENTER; /* necessary e.g. for dounwind */	573	ENTER; /* necessary e.g. for dounwind */
695	}
696	}	574	}
697		575
698	static void	576	static void
699	continue_coro (void *arg)	577	free_coro_mortal ()
700	{	578	{
701	/*
702	* this is a _very_ stripped down perl interpreter ;)
703	*/
704	dTHX;
705	Coro__State ctx = (Coro__State)arg;
706	JMPENV coro_start_env;
707
708	PL_top_env = &ctx->start_env;
709
710	ctx->cursp = 0;
711	PL_op = PL_op->op_next;
712	CALLRUNOPS(aTHX);
713
714	abort ();
715	}
716
717	STATIC void
718	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
719	{
720	dSTACKLEVEL;
721
722	if (prev != next)
723	{
724	if (next->mainstack)
725	{
726	LOCK;
727	SAVE (prev, flags);
728	LOAD (next);
729	UNLOCK;
730
731	/* mark this state as in-use */
732	next->mainstack = 0;
733	next->tmps_ix = -2;
734
735	/* stacklevel changed? if yes, grab the stack for us! */
736	if (flags & TRANSFER_SAVE_CCTXT)
737	{
738	if (!prev->stack)
739	allocate_stack (prev, 0);
740	else if (prev->cursp != stacklevel
741	&& prev->stack->usecnt > 1)
742	{
743	prev->gencnt = ++prev->stack->gencnt;
744	prev->stack->usecnt = 1;
745	}
746
747	/* has our stack been invalidated? */
748	if (next->stack && next->stack->gencnt != next->gencnt)
749	{
750	deallocate_stack (next);
751	allocate_stack (next, 1);
752	coro_create (&(next->stack->cctx),
753	continue_coro, (void *)next,
754	next->stack->sptr, labs (next->stack->ssize));
755	}
756
757	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
758	prev->cursp = stacklevel;
759	/* don't add any code here */
760	}
761	else
762	next->cursp = stacklevel;
763	}
764	else if (next->tmps_ix == -2)
765	croak ("tried to transfer to running coroutine");
766	else
767	{
768	LOCK;
769	SAVE (prev, -1); /* first get rid of the old state */
770	UNLOCK;
771
772	if (flags & TRANSFER_SAVE_CCTXT)
773	{
774	if (!prev->stack)
775	allocate_stack (prev, 0);
776
777	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
778	{
779	PL_top_env = &next->start_env;
780
781	setup_coro (next);
782	next->cursp = stacklevel;
783
784	prev->stack->refcnt++;
785	prev->stack->usecnt++;
786	next->stack = prev->stack;
787	next->gencnt = prev->gencnt;
788	}
789	else
790	{
791	assert (!next->stack);
792	allocate_stack (next, 1);
793	coro_create (&(next->stack->cctx),
794	setup_coro, (void *)next,
795	next->stack->sptr, labs (next->stack->ssize));
796	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
797	prev->cursp = stacklevel;
798	/* don't add any code here */
799	}
800	}
801	else
802	{
803	setup_coro (next);
804	next->cursp = stacklevel;
805	}
806	}
807	}
808
809	LOCK;
810	if (coro_mortal)	579	if (coro_mortal)
811	{	580	{
812	SvREFCNT_dec (coro_mortal);	581	SvREFCNT_dec (coro_mortal);
813	coro_mortal = 0;	582	coro_mortal = 0;
814	}	583	}
		584	}
		585
		586	static void NOINLINE
		587	prepare_cctx (coro_stack *cctx)
		588	{
		589	dSP;
		590	UNOP myop;
		591
		592	Zero (&myop, 1, UNOP);
		593	myop.op_next = PL_op;
		594	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		595
		596	PUSHMARK(SP);
		597	EXTEND (SP, 2);
		598	PUSHs (newSViv (PTR2IV (cctx)));
		599	PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
		600	PUTBACK;
		601	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		602	SPAGAIN;
		603	}
		604
		605	static void
		606	coro_run (void *arg)
		607	{
		608	/*
		609	* this is a _very_ stripped down perl interpreter ;)
		610	*/
815	UNLOCK;	611	UNLOCK;
816	}
817		612
818	#define SV_CORO(sv,func) \	613	PL_top_env = &PL_start_env;
819	do { \	614	prepare_cctx ((coro_stack *)arg);
820	if (SvROK (sv)) \
821	sv = SvRV (sv); \
822	\
823	if (SvTYPE (sv) == SVt_PVHV) \
824	{ \
825	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
826	\
827	if (!he) \
828	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
829	\
830	(sv) = SvRV (HeVAL(he)); \
831	} \
832	\
833	/* must also be changed inside Coro::Cont::yield */ \
834	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
835	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
836	\
837	} while(0)
838		615
839	#define SvSTATE(sv) (struct coro *)SvIV (sv)	616	/* somebody will hit me for both perl_run and PL_restartop */
		617	perl_run (PERL_GET_CONTEXT);
840		618
		619	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
		620	abort ();
		621	}
		622
		623	static coro_stack *
		624	stack_new ()
		625	{
		626	coro_stack *stack;
		627
		628	New (0, stack, 1, coro_stack);
		629
		630	#if HAVE_MMAP
		631
		632	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		633	/* mmap suppsedly does allocate-on-write for us */
		634	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		635
		636	if (stack->sptr == (void *)-1)
		637	{
		638	perror ("FATAL: unable to mmap stack for coroutine");
		639	_exit (EXIT_FAILURE);
		640	}
		641
		642	# if STACKGUARD
		643	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		644	# endif
		645
		646	#else
		647
		648	stack->ssize = STACKSIZE * (long)sizeof (long);
		649	New (0, stack->sptr, STACKSIZE, long);
		650
		651	if (!stack->sptr)
		652	{
		653	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		654	_exit (EXIT_FAILURE);
		655	}
		656
		657	#endif
		658
		659	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		660
		661	return stack;
		662	}
		663
		664	static void
		665	stack_free (coro_stack *stack)
		666	{
		667	if (!stack)
		668	return;
		669
		670	#if HAVE_MMAP
		671	munmap (stack->sptr, stack->ssize);
		672	#else
		673	Safefree (stack->sptr);
		674	#endif
		675
		676	Safefree (stack);
		677	}
		678
		679	static coro_stack *stack_first;
		680
		681	static coro_stack *
		682	stack_get ()
		683	{
		684	coro_stack *stack;
		685
		686	if (stack_first)
		687	{
		688	stack = stack_first;
		689	stack_first = stack->next;
		690	}
		691	else
		692	{
		693	stack = stack_new ();
		694	PL_op = PL_op->op_next;
		695	}
		696
		697	return stack;
		698	}
		699
		700	static void
		701	stack_put (coro_stack *stack)
		702	{
		703	stack->next = stack_first;
		704	stack_first = stack;
		705	}
		706
		707	/* never call directly, always through the coro_state_transfer global variable */
		708	static void NOINLINE
		709	transfer (struct coro *prev, struct coro *next, int flags)
		710	{
		711	dSTACKLEVEL;
		712
		713	/* sometimes transfer is only called to set idle_sp */
		714	if (flags == TRANSFER_SET_STACKLEVEL)
		715	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		716	else if (prev != next)
		717	{
		718	coro_stack *prev__stack;
		719
		720	LOCK;
		721
		722	if (next->mainstack)
		723	{
		724	/* coroutine already started */
		725	SAVE (prev, flags);
		726	LOAD (next);
		727	}
		728	else
		729	{
		730	/* need to start coroutine */
		731	/* first get rid of the old state */
		732	SAVE (prev, -1);
		733	/* setup coroutine call */
		734	setup_coro (next);
		735	/* need a stack */
		736	next->stack = 0;
		737	}
		738
		739	if (!prev->stack)
		740	/* create a new empty context */
		741	Newz (0, prev->stack, 1, coro_stack);
		742
		743	prev__stack = prev->stack;
		744
		745	/* possibly "free" the stack */
		746	if (prev__stack->idle_sp == STACKLEVEL)
		747	{
		748	stack_put (prev__stack);
		749	prev->stack = 0;
		750	}
		751
		752	if (!next->stack)
		753	next->stack = stack_get ();
		754
		755	if (prev__stack != next->stack)
		756	{
		757	prev__stack->top_env = PL_top_env;
		758	PL_top_env = next->stack->top_env;
		759	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		760	}
		761
		762	free_coro_mortal ();
		763
		764	UNLOCK;
		765	}
		766	}
		767
		768	struct transfer_args
		769	{
		770	struct coro *prev, *next;
		771	int flags;
		772	};
		773
		774	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		775
		776	static void
		777	coro_state_destroy (struct coro *coro)
		778	{
		779	if (coro->refcnt--)
		780	return;
		781
		782	if (coro->mainstack && coro->mainstack != main_mainstack)
		783	{
		784	struct coro temp;
		785
		786	SAVE ((&temp), TRANSFER_SAVE_ALL);
		787	LOAD (coro);
		788
		789	destroy_stacks ();
		790
		791	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		792
		793	coro->mainstack = 0;
		794	}
		795
		796	stack_free (coro->stack);
		797	SvREFCNT_dec (coro->args);
		798	Safefree (coro);
		799	}
		800
841	static void	801	static int
		802	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		803	{
		804	struct coro *coro = (struct coro *)mg->mg_ptr;
		805	mg->mg_ptr = 0;
		806
		807	coro_state_destroy (coro);
		808
		809	return 0;
		810	}
		811
		812	static int
		813	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		814	{
		815	struct coro *coro = (struct coro *)mg->mg_ptr;
		816
		817	++coro->refcnt;
		818
		819	return 0;
		820	}
		821
		822	static MGVTBL coro_state_vtbl = {
		823	0, 0, 0, 0,
		824	coro_state_clear,
		825	0,
		826	#ifdef MGf_DUP
		827	coro_state_dup,
		828	#endif
		829	};
		830
		831	static struct coro *
		832	SvSTATE (SV *coro)
		833	{
		834	HV *stash;
		835	MAGIC *mg;
		836
		837	if (SvROK (coro))
		838	coro = SvRV (coro);
		839
		840	stash = SvSTASH (coro);
		841	if (stash != coro_stash && stash != coro_state_stash)
		842	{
		843	/* very slow, but rare, check */
		844	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		845	croak ("Coro::State object required");
		846	}
		847
		848	mg = SvMAGIC (coro);
		849	assert (mg->mg_type == PERL_MAGIC_ext);
		850	return (struct coro *)mg->mg_ptr;
		851	}
		852
		853	static void
		854	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		855	{
		856	ta->prev = SvSTATE (prev);
		857	ta->next = SvSTATE (next);
		858	ta->flags = flags;
		859	}
		860
		861	static void
842	api_transfer(pTHX_ SV *prev, SV *next, int flags)	862	api_transfer (SV *prev, SV *next, int flags)
843	{	863	{
844	SV_CORO (prev, "Coro::transfer");	864	dTHX;
845	SV_CORO (next, "Coro::transfer");	865	struct transfer_args ta;
846		866
847	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	867	prepare_transfer (&ta, prev, next, flags);
		868	TRANSFER (ta);
848	}	869	}
849		870
850	/** Coro ********************************************************************/	871	/** Coro ********************************************************************/
851		872
852	#define PRIO_MAX 3	873	#define PRIO_MAX 3
…		…
856	#define PRIO_IDLE -3	877	#define PRIO_IDLE -3
857	#define PRIO_MIN -4	878	#define PRIO_MIN -4
858		879
859	/* for Coro.pm */	880	/* for Coro.pm */
860	static GV *coro_current, *coro_idle;	881	static GV *coro_current, *coro_idle;
861	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	882	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
862	static int coro_nready;	883	static int coro_nready;
863		884
864	static void	885	static void
865	coro_enq (pTHX_ SV *sv)	886	coro_enq (SV *sv)
866	{	887	{
		888	int prio;
		889
867	if (SvTYPE (sv) == SVt_PVHV)	890	if (SvTYPE (sv) != SVt_PVHV)
868	{
869	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
870	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
871
872	prio = prio > PRIO_MAX ? PRIO_MAX
873	: prio < PRIO_MIN ? PRIO_MIN
874	: prio;
875
876	av_push (coro_ready [prio - PRIO_MIN], sv);
877	coro_nready++;
878
879	return;
880	}
881
882	croak ("Coro::ready tried to enqueue something that is not a coroutine");	891	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		892
		893	prio = SvSTATE (sv)->prio;
		894
		895	av_push (coro_ready [prio - PRIO_MIN], sv);
		896	coro_nready++;
883	}	897	}
884		898
885	static SV *	899	static SV *
886	coro_deq (pTHX_ int min_prio)	900	coro_deq (int min_prio)
887	{	901	{
888	int prio = PRIO_MAX - PRIO_MIN;	902	int prio = PRIO_MAX - PRIO_MIN;
889		903
890	min_prio -= PRIO_MIN;	904	min_prio -= PRIO_MIN;
891	if (min_prio < 0)	905	if (min_prio < 0)
892	min_prio = 0;	906	min_prio = 0;
893		907
894	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	908	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
895	if (av_len (coro_ready[prio]) >= 0)	909	if (AvFILLp (coro_ready [prio]) >= 0)
896	{	910	{
897	coro_nready--;	911	coro_nready--;
898	return av_shift (coro_ready[prio]);	912	return av_shift (coro_ready [prio]);
899	}	913	}
900		914
901	return 0;	915	return 0;
902	}	916	}
903		917
…		…
908		922
909	if (SvROK (coro))	923	if (SvROK (coro))
910	coro = SvRV (coro);	924	coro = SvRV (coro);
911		925
912	LOCK;	926	LOCK;
913	coro_enq (aTHX_ SvREFCNT_inc (coro));	927	coro_enq (SvREFCNT_inc (coro));
914	UNLOCK;	928	UNLOCK;
915	}	929	}
916		930
917	static void	931	static void
		932	prepare_schedule (struct transfer_args *ta)
		933	{
		934	SV *current, *prev, *next;
		935
		936	current = GvSV (coro_current);
		937
		938	for (;;)
		939	{
		940	LOCK;
		941	next = coro_deq (PRIO_MIN);
		942	UNLOCK;
		943
		944	if (next)
		945	break;
		946
		947	{
		948	dSP;
		949
		950	ENTER;
		951	SAVETMPS;
		952
		953	PUSHMARK (SP);
		954	PUTBACK;
		955	call_sv (GvSV (coro_idle), G_DISCARD);
		956
		957	FREETMPS;
		958	LEAVE;
		959	}
		960	}
		961
		962	prev = SvRV (current);
		963	SvRV (current) = next;
		964
		965	/* free this only after the transfer */
		966	LOCK;
		967	free_coro_mortal ();
		968	UNLOCK;
		969	coro_mortal = prev;
		970
		971	ta->prev = SvSTATE (prev);
		972	ta->next = SvSTATE (next);
		973	ta->flags = TRANSFER_SAVE_ALL;
		974	}
		975
		976	static void
		977	prepare_cede (struct transfer_args *ta)
		978	{
		979	LOCK;
		980	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		981	UNLOCK;
		982
		983	prepare_schedule (ta);
		984	}
		985
		986	static void
918	api_schedule (void)	987	api_schedule (void)
919	{	988	{
920	dTHX;	989	dTHX;
		990	struct transfer_args ta;
921		991
922	SV *prev, *next;	992	prepare_schedule (&ta);
923		993	TRANSFER (ta);
924	LOCK;
925
926	prev = SvRV (GvSV (coro_current));
927	next = coro_deq (aTHX_ PRIO_MIN);
928
929	if (!next)
930	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
931
932	/* free this only after the transfer */
933	coro_mortal = prev;
934	SV_CORO (prev, "Coro::schedule");
935
936	SvRV (GvSV (coro_current)) = next;
937
938	SV_CORO (next, "Coro::schedule");
939
940	UNLOCK;
941
942	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
943	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
944	}	994	}
945		995
946	static void	996	static void
947	api_cede (void)	997	api_cede (void)
948	{	998	{
949	dTHX;	999	dTHX;
		1000	struct transfer_args ta;
950		1001
951	LOCK;	1002	prepare_cede (&ta);
952	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1003	TRANSFER (ta);
953	UNLOCK;
954
955	api_schedule ();
956	}	1004	}
957		1005
958	MODULE = Coro::State PACKAGE = Coro::State	1006	MODULE = Coro::State PACKAGE = Coro::State
959		1007
960	PROTOTYPES: ENABLE	1008	PROTOTYPES: DISABLE
961		1009
962	BOOT:	1010	BOOT:
963	{ /* {} necessary for stoopid perl-5.6.x */	1011	{
964	#ifdef USE_ITHREADS	1012	#ifdef USE_ITHREADS
965	MUTEX_INIT (&coro_mutex);	1013	MUTEX_INIT (&coro_mutex);
966	#endif	1014	#endif
		1015	BOOT_PAGESIZE;
967		1016
968	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
969	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
970	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1017	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
971		1018
972	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1019	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
973	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1020	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
974	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1021	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
975	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
976		1022
977	main_mainstack = PL_mainstack;	1023	main_mainstack = PL_mainstack;
978		1024
979	coroapi.ver = CORO_API_VERSION;	1025	coroapi.ver = CORO_API_VERSION;
980	coroapi.transfer = api_transfer;	1026	coroapi.transfer = api_transfer;
981	}
982		1027
983	Coro::State	1028	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
984	_newprocess(args)	1029	}
985	SV * args	1030
986	PROTOTYPE: $	1031	SV *
		1032	new (char *klass, ...)
987	CODE:	1033	CODE:
988	Coro__State coro;	1034	{
		1035	struct coro *coro;
		1036	HV *hv;
		1037	int i;
989		1038
990	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
991	croak ("Coro::State::_newprocess expects an arrayref");
992
993	Newz (0, coro, 1, struct coro);	1039	Newz (0, coro, 1, struct coro);
		1040	coro->args = newAV ();
994		1041
995	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1042	hv = newHV ();
		1043	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1044	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1045
		1046	for (i = 1; i < items; i++)
		1047	av_push (coro->args, newSVsv (ST (i)));
		1048
996	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1049	/*coro->mainstack = 0; *//*actual work is done inside transfer */
997	/*coro->stack = 0;*/	1050	/*coro->stack = 0;*/
998		1051	}
999	/* same as JMPENV_BOOTSTRAP */
1000	/* we might be able to recycle start_env, but safe is safe */
1001	/*Zero(&coro->start_env, 1, JMPENV);*/
1002	coro->start_env.je_ret = -1;
1003	coro->start_env.je_mustcatch = TRUE;
1004
1005	RETVAL = coro;
1006	OUTPUT:	1052	OUTPUT:
1007	RETVAL	1053	RETVAL
1008		1054
1009	void	1055	void
1010	transfer(prev, next, flags)	1056	_set_stacklevel (...)
1011	SV *prev	1057	ALIAS:
1012	SV *next	1058	Coro::State::transfer = 1
1013	int flags	1059	Coro::schedule = 2
1014	PROTOTYPE: @	1060	Coro::cede = 3
		1061	Coro::Cont::yield = 4
1015	CODE:	1062	CODE:
1016	PUTBACK;	1063	{
1017	SV_CORO (next, "Coro::transfer");	1064	struct transfer_args ta;
1018	SV_CORO (prev, "Coro::transfer");	1065
1019	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1066	switch (ix)
1020	SPAGAIN;	1067	{
		1068	case 0:
		1069	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
		1070	ta.next = 0;
		1071	ta.flags = TRANSFER_SET_STACKLEVEL;
		1072	break;
		1073
		1074	case 1:
		1075	if (items != 3)
		1076	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1077
		1078	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1079	break;
		1080
		1081	case 2:
		1082	prepare_schedule (&ta);
		1083	break;
		1084
		1085	case 3:
		1086	prepare_cede (&ta);
		1087	break;
		1088
		1089	case 4:
		1090	{
		1091	SV *yieldstack;
		1092	SV *sv;
		1093	AV *defav = GvAV (PL_defgv);
		1094
		1095	yieldstack = *hv_fetch (
		1096	(HV *)SvRV (GvSV (coro_current)),
		1097	"yieldstack", sizeof ("yieldstack") - 1,
		1098	0
		1099	);
		1100
		1101	/* set up @_ -- ugly */
		1102	av_clear (defav);
		1103	av_fill (defav, items - 1);
		1104	while (items--)
		1105	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1106
		1107	sv = av_pop ((AV *)SvRV (yieldstack));
		1108	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1109	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1110	ta.flags = 0;
		1111	SvREFCNT_dec (sv);
		1112	}
		1113	break;
		1114
		1115	}
		1116
		1117	TRANSFER (ta);
		1118	}
1021		1119
1022	void	1120	void
1023	DESTROY(coro)	1121	_clone_state_from (SV *dst, SV *src)
1024	Coro::State coro	1122	CODE:
1025	CODE:	1123	{
		1124	struct coro *coro_src = SvSTATE (src);
1026		1125
1027	if (coro->mainstack && coro->mainstack != main_mainstack)	1126	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1028	{
1029	struct coro temp;
1030		1127
1031	PUTBACK;	1128	++coro_src->refcnt;
1032	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1129	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1033	LOAD (aTHX_ coro);	1130	}
1034	SPAGAIN;
1035
1036	destroy_stacks (aTHX);
1037
1038	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1039	SPAGAIN;
1040
1041	coro->mainstack = 0;
1042	}
1043
1044	deallocate_stack (coro);
1045	SvREFCNT_dec (coro->args);
1046	Safefree (coro);
1047		1131
1048	void	1132	void
1049	_exit(code)	1133	_exit (code)
1050	int code	1134	int code
1051	PROTOTYPE: $	1135	PROTOTYPE: $
1052	CODE:	1136	CODE:
1053	_exit (code);	1137	_exit (code);
1054		1138
1055	MODULE = Coro::State PACKAGE = Coro::Cont
1056
1057	# this is slightly dirty (should expose a c-level api)
1058
1059	void
1060	yield(...)
1061	PROTOTYPE: @
1062	CODE:
1063	SV *yieldstack;
1064	SV *sv;
1065	AV *defav = GvAV (PL_defgv);
1066	struct coro *prev, *next;
1067
1068	yieldstack = *hv_fetch (
1069	(HV *)SvRV (GvSV (coro_current)),
1070	"yieldstack", sizeof ("yieldstack") - 1,
1071	0
1072	);
1073
1074	/* set up @_ -- ugly */
1075	av_clear (defav);
1076	av_fill (defav, items - 1);
1077	while (items--)
1078	av_store (defav, items, SvREFCNT_inc (ST(items)));
1079
1080	sv = av_pop ((AV *)SvRV (yieldstack));
1081	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1082	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1083	SvREFCNT_dec (sv);
1084
1085	transfer (aTHX_ prev, next, 0);
1086
1087	MODULE = Coro::State PACKAGE = Coro	1139	MODULE = Coro::State PACKAGE = Coro
1088		1140
1089	# this is slightly dirty (should expose a c-level api)
1090
1091	BOOT:	1141	BOOT:
1092	{	1142	{
1093	int i;	1143	int i;
		1144
1094	HV *stash = gv_stashpv ("Coro", TRUE);	1145	coro_stash = gv_stashpv ("Coro", TRUE);
1095		1146
1096	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1147	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1097	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1148	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1098	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1149	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1099	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1150	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1100	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1151	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1101	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1152	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1102		1153
1103	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1154	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1104	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1155	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1105		1156
1106	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1157	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1114	coroapi.ready = api_ready;	1165	coroapi.ready = api_ready;
1115	coroapi.nready = &coro_nready;	1166	coroapi.nready = &coro_nready;
1116	coroapi.current = coro_current;	1167	coroapi.current = coro_current;
1117		1168
1118	GCoroAPI = &coroapi;	1169	GCoroAPI = &coroapi;
1119	sv_setiv(sv, (IV)&coroapi);	1170	sv_setiv (sv, (IV)&coroapi);
1120	SvREADONLY_on(sv);	1171	SvREADONLY_on (sv);
1121	}	1172	}
1122	}	1173	}
1123		1174
1124	#if !PERL_MICRO	1175	int
		1176	prio (Coro::State coro, int newprio = 0)
		1177	ALIAS:
		1178	nice = 1
		1179	CODE:
		1180	{
		1181	RETVAL = coro->prio;
		1182
		1183	if (items > 1)
		1184	{
		1185	if (ix)
		1186	newprio += coro->prio;
		1187
		1188	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1189	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1190
		1191	coro->prio = newprio;
		1192	}
		1193	}
1125		1194
1126	void	1195	void
1127	ready(self)	1196	ready (SV *self)
1128	SV * self
1129	PROTOTYPE: $	1197	PROTOTYPE: $
1130	CODE:	1198	CODE:
1131	api_ready (self);	1199	api_ready (self);
1132		1200
1133	#endif
1134
1135	int	1201	int
1136	nready(...)	1202	nready (...)
1137	PROTOTYPE:	1203	PROTOTYPE:
1138	CODE:	1204	CODE:
1139	RETVAL = coro_nready;	1205	RETVAL = coro_nready;
1140	OUTPUT:	1206	OUTPUT:
1141	RETVAL	1207	RETVAL
1142		1208
		1209	MODULE = Coro::State PACKAGE = Coro::AIO
		1210
		1211	SV *
		1212	_get_state ()
		1213	CODE:
		1214	{
		1215	struct {
		1216	int errorno;
		1217	int laststype;
		1218	int laststatval;
		1219	Stat_t statcache;
		1220	} data;
		1221
		1222	data.errorno = errno;
		1223	data.laststype = PL_laststype;
		1224	data.laststatval = PL_laststatval;
		1225	data.statcache = PL_statcache;
		1226
		1227	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1228	}
		1229	OUTPUT:
		1230	RETVAL
		1231
1143	void	1232	void
1144	schedule(...)	1233	_set_state (char *data_)
1145	PROTOTYPE:	1234	PROTOTYPE: $
1146	CODE:	1235	CODE:
1147	api_schedule ();	1236	{
		1237	struct {
		1238	int errorno;
		1239	int laststype;
		1240	int laststatval;
		1241	Stat_t statcache;
		1242	} *data = (void *)data_;
1148		1243
1149	void	1244	errno = data->errorno;
1150	cede(...)	1245	PL_laststype = data->laststype;
1151	PROTOTYPE:	1246	PL_laststatval = data->laststatval;
1152	CODE:	1247	PL_statcache = data->statcache;
1153	api_cede ();	1248	}
1154

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines