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Comparing Coro/Coro/State.xs (file contents):
Revision 1.55 by pcg, Thu Apr 1 02:29:05 2004 UTC vs.
Revision 1.92 by root, Sun Nov 26 02:16:19 2006 UTC

		1	#define PERL_NO_GET_CONTEXT
		2
		3	#include "libcoro/coro.c"
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "patchlevel.h"	9	#include "patchlevel.h"
6		10
7	#if PATCHLEVEL < 6	11	#if PERL_VERSION < 6
8	# ifndef PL_ppaddr	12	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	13	# define PL_ppaddr ppaddr
10	# endif	14	# endif
11	# ifndef call_sv	15	# ifndef call_sv
12	# define call_sv perl_call_sv	16	# define call_sv perl_call_sv
…		…
23	# ifndef IS_PADCONST	27	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	28	# define IS_PADCONST(v) 0
25	# endif	29	# endif
26	#endif	30	#endif
27		31
28	#include "libcoro/coro.c"
29
30	#include <signal.h>	32	#include <stdio.h>
		33	#include <errno.h>
		34
		35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		36	# undef STACKGUARD
		37	#endif
		38
		39	#ifndef STACKGUARD
		40	# define STACKGUARD 0
		41	#endif
31		42
32	#ifdef HAVE_MMAP	43	#ifdef HAVE_MMAP
33	# include <unistd.h>	44	# include <unistd.h>
34	# include <sys/mman.h>	45	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS	46	# ifndef MAP_ANONYMOUS
…		…
37	# define MAP_ANONYMOUS MAP_ANON	48	# define MAP_ANONYMOUS MAP_ANON
38	# else	49	# else
39	# undef HAVE_MMAP	50	# undef HAVE_MMAP
40	# endif	51	# endif
41	# endif	52	# endif
		53	# include <limits.h>
		54	# ifndef PAGESIZE
		55	# define PAGESIZE pagesize
		56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		57	static long pagesize;
		58	# else
		59	# define BOOT_PAGESIZE
42	#endif	60	# endif
43		61	#endif
44	#define SUB_INIT "Coro::State::initialize"
45	#define UCORO_STATE "_coro_state"
46		62
47	/* The next macro should declare a variable stacklevel that contains and approximation	63	/* The next macro should declare a variable stacklevel that contains and approximation
48	* to the current C stack pointer. Its property is that it changes with each call	64	* to the current C stack pointer. Its property is that it changes with each call
49	* and should be unique. */	65	* and should be unique. */
		66	#define dSTACKLEVEL int stacklevel
50	#define dSTACKLEVEL void *stacklevel = &stacklevel	67	#define STACKLEVEL ((void *)&stacklevel)
51		68
52	#define IN_DESTRUCT (PL_main_cv == Nullcv)	69	#define IN_DESTRUCT (PL_main_cv == Nullcv)
53		70
54	#define labs(l) ((l) >= 0 ? (l) : -(l))	71	#define labs(l) ((l) >= 0 ? (l) : -(l))
55		72
56	#include "CoroAPI.h"	73	#include "CoroAPI.h"
		74
		75	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
57		76
58	#ifdef USE_ITHREADS	77	#ifdef USE_ITHREADS
59	static perl_mutex coro_mutex;	78	static perl_mutex coro_mutex;
60	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	79	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
61	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	80	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
62	#else	81	#else
63	# define LOCK 0	82	# define LOCK (void)0
64	# define UNLOCK 0	83	# define UNLOCK (void)0
65	#endif	84	#endif
66		85
67	static struct CoroAPI coroapi;	86	static struct CoroAPI coroapi;
		87	static AV *main_mainstack; /* used to differentiate between $main and others */
		88	static HV *coro_state_stash, *coro_stash;
		89	static SV *coro_mortal; /* will be freed after next transfer */
68		90
69	/* this is actually not only the c stack but also c registers etc... */	91	/* this is a structure representing a c-level coroutine */
70	typedef struct {	92	typedef struct coro_stack {
71	int refcnt; /* pointer reference counter */	93	struct coro_stack *next;
72	int usecnt; /* shared by how many coroutines */
73	int gencnt; /* generation counter */
74		94
75	coro_context cctx;	95	void *idle_sp; /* original stacklevel when coroutine was created */
76
77	void *sptr;	96	void *sptr;
78	long ssize; /* positive == mmap, otherwise malloc */	97	long ssize; /* positive == mmap, otherwise malloc */
		98
		99	/* cpu state */
		100	coro_context cctx;
		101	JMPENV *top_env;
79	} coro_stack;	102	} coro_stack;
80		103
		104	/* the (fake) coro_stack representing the main program */
		105	static coro_stack *main_stack;
		106
		107	/* this is a structure representing a perl-level coroutine */
81	struct coro {	108	struct coro {
82	/* the top-level JMPENV for each coroutine, needed to catch dies. */	109	/* the c coroutine allocated to this perl coroutine, if any */
83	JMPENV start_env;
84
85	/* the optional C context */
86	coro_stack *stack;	110	coro_stack *stack;
87	void *cursp;	111
		112	/* data associated with this coroutine (initial args) */
		113	AV *args;
88	int gencnt;	114	int refcnt;
89		115
90	/* optionally saved, might be zero */	116	/* optionally saved, might be zero */
91	AV *defav;	117	AV *defav;
92	SV *defsv;	118	SV *defsv;
93	SV *errsv;	119	SV *errsv;
…		…
102	AV *mainstack;	128	AV *mainstack;
103	SV **stack_sp;	129	SV **stack_sp;
104	OP *op;	130	OP *op;
105	SV **curpad;	131	SV **curpad;
106	AV *comppad;	132	AV *comppad;
		133	CV *compcv;
107	SV **stack_base;	134	SV **stack_base;
108	SV **stack_max;	135	SV **stack_max;
109	SV **tmps_stack;	136	SV **tmps_stack;
110	I32 tmps_floor;	137	I32 tmps_floor;
111	I32 tmps_ix;	138	I32 tmps_ix;
…		…
120	I32 savestack_ix;	147	I32 savestack_ix;
121	I32 savestack_max;	148	I32 savestack_max;
122	OP **retstack;	149	OP **retstack;
123	I32 retstack_ix;	150	I32 retstack_ix;
124	I32 retstack_max;	151	I32 retstack_max;
		152	PMOP *curpm;
125	COP *curcop;	153	COP *curcop;
126	JMPENV *top_env;
127		154
128	/* data associated with this coroutine (initial args) */	155	/* coro process data */
129	AV *args;	156	int prio;
130	};	157	};
131		158
132	typedef struct coro *Coro__State;	159	typedef struct coro *Coro__State;
133	typedef struct coro *Coro__State_or_hashref;	160	typedef struct coro *Coro__State_or_hashref;
134		161
135	static AV *main_mainstack; /* used to differentiate between $main and others */	162	static AV *
136	static HV *coro_state_stash;	163	coro_clone_padlist (pTHX_ CV *cv)
137	static SV *ucoro_state_sv;
138	static U32 ucoro_state_hash;
139	static SV *coro_mortal; /* will be freed after next transfer */
140
141	/* mostly copied from op.c:cv_clone2 */
142	STATIC AV *
143	clone_padlist (AV *protopadlist)
144	{	164	{
145	AV *av;	165	AV *padlist = CvPADLIST (cv);
146	I32 ix;
147	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
148	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
149	SV **pname = AvARRAY (protopad_name);
150	SV **ppad = AvARRAY (protopad);
151	I32 fname = AvFILLp (protopad_name);
152	I32 fpad = AvFILLp (protopad);
153	AV *newpadlist, *newpad_name, *newpad;	166	AV *newpadlist, *newpad;
154	SV **npad;
155
156	newpad_name = newAV ();
157	for (ix = fname; ix >= 0; ix--)
158	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
159
160	newpad = newAV ();
161	av_fill (newpad, AvFILLp (protopad));
162	npad = AvARRAY (newpad);
163		167
164	newpadlist = newAV ();	168	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	169	AvREAL_off (newpadlist);
166	av_store (newpadlist, 0, (SV *) newpad_name);	170	#if PERL_VERSION < 9
		171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		172	#else
		173	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		174	#endif
		175	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		176	--AvFILLp (padlist);
		177
		178	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
167	av_store (newpadlist, 1, (SV *) newpad);	179	av_store (newpadlist, 1, (SV *)newpad);
168
169	av = newAV (); /* will be @_ */
170	av_extend (av, 0);
171	av_store (newpad, 0, (SV *) av);
172	AvFLAGS (av) = AVf_REIFY;
173
174	for (ix = fpad; ix > 0; ix--)
175	{
176	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
177
178	if (namesv && namesv != &PL_sv_undef)
179	{
180	char *name = SvPVX (namesv); /* XXX */
181
182	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
183	{ /* lexical from outside? */
184	npad[ix] = SvREFCNT_inc (ppad[ix]);
185	}
186	else
187	{ /* our own lexical */
188	SV *sv;
189	if (*name == '&')
190	sv = SvREFCNT_inc (ppad[ix]);
191	else if (*name == '@')
192	sv = (SV *) newAV ();
193	else if (*name == '%')
194	sv = (SV *) newHV ();
195	else
196	sv = NEWSV (0, 0);
197
198	#ifdef SvPADBUSY
199	if (!SvPADBUSY (sv))
200	#endif
201	SvPADMY_on (sv);
202
203	npad[ix] = sv;
204	}
205	}
206	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
207	{
208	npad[ix] = SvREFCNT_inc (ppad[ix]);
209	}
210	else
211	{
212	SV *sv = NEWSV (0, 0);
213	SvPADTMP_on (sv);
214	npad[ix] = sv;
215	}
216	}
217
218	#if 0 /* return -ENOTUNDERSTOOD */
219	/* Now that vars are all in place, clone nested closures. */
220
221	for (ix = fpad; ix > 0; ix--) {
222	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
223	if (namesv
224	&& namesv != &PL_sv_undef
225	&& !(SvFLAGS(namesv) & SVf_FAKE)
226	&& *SvPVX(namesv) == '&'
227	&& CvCLONE(ppad[ix]))
228	{
229	CV *kid = cv_clone((CV*)ppad[ix]);
230	SvREFCNT_dec(ppad[ix]);
231	CvCLONE_on(kid);
232	SvPADMY_on(kid);
233	npad[ix] = (SV*)kid;
234	}
235	}
236	#endif
237		180
238	return newpadlist;	181	return newpadlist;
239	}	182	}
240		183
241	STATIC void	184	static void
242	free_padlist (AV *padlist)	185	free_padlist (pTHX_ AV *padlist)
243	{	186	{
244	/* may be during global destruction */	187	/* may be during global destruction */
245	if (SvREFCNT (padlist))	188	if (SvREFCNT (padlist))
246	{	189	{
247	I32 i = AvFILLp (padlist);	190	I32 i = AvFILLp (padlist);
…		…
260		203
261	SvREFCNT_dec ((SV*)padlist);	204	SvREFCNT_dec ((SV*)padlist);
262	}	205	}
263	}	206	}
264		207
265	STATIC int	208	static int
266	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	209	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
267	{	210	{
268	AV *padlist;	211	AV *padlist;
269	AV *av = (AV *)mg->mg_obj;	212	AV *av = (AV *)mg->mg_obj;
270		213
271	/* casting is fun. */	214	/* casting is fun. */
272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
273	free_padlist (padlist);	216	free_padlist (aTHX_ padlist);
		217
		218	SvREFCNT_dec (av);
		219
		220	return 0;
274	}	221	}
275		222
276	#define PERL_MAGIC_coro PERL_MAGIC_ext	223	#define PERL_MAGIC_coro PERL_MAGIC_ext
277		224
278	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
279		226
280	/* the next two functions merely cache the padlists */	227	/* the next two functions merely cache the padlists */
281	STATIC void	228	static void
282	get_padlist (CV *cv)	229	get_padlist (pTHX_ CV *cv)
283	{	230	{
284	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	231	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
285		232
286	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	233	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
287	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	234	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
288	else	235	else
		236	{
		237	#if 0
		238	/* this should work - but it doesn't :( */
		239	CV *cp = Perl_cv_clone (aTHX_ cv);
		240	CvPADLIST (cv) = CvPADLIST (cp);
		241	CvPADLIST (cp) = 0;
		242	SvREFCNT_dec (cp);
		243	#else
289	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	244	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		245	#endif
		246	}
290	}	247	}
291		248
292	STATIC void	249	static void
293	put_padlist (CV *cv)	250	put_padlist (pTHX_ CV *cv)
294	{	251	{
295	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	252	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
296		253
297	if (!mg)	254	if (!mg)
298	{	255	{
…		…
324	PL_mainstack = c->mainstack;	281	PL_mainstack = c->mainstack;
325	PL_stack_sp = c->stack_sp;	282	PL_stack_sp = c->stack_sp;
326	PL_op = c->op;	283	PL_op = c->op;
327	PL_curpad = c->curpad;	284	PL_curpad = c->curpad;
328	PL_comppad = c->comppad;	285	PL_comppad = c->comppad;
		286	PL_compcv = c->compcv;
329	PL_stack_base = c->stack_base;	287	PL_stack_base = c->stack_base;
330	PL_stack_max = c->stack_max;	288	PL_stack_max = c->stack_max;
331	PL_tmps_stack = c->tmps_stack;	289	PL_tmps_stack = c->tmps_stack;
332	PL_tmps_floor = c->tmps_floor;	290	PL_tmps_floor = c->tmps_floor;
333	PL_tmps_ix = c->tmps_ix;	291	PL_tmps_ix = c->tmps_ix;
…		…
339	PL_scopestack_ix = c->scopestack_ix;	297	PL_scopestack_ix = c->scopestack_ix;
340	PL_scopestack_max = c->scopestack_max;	298	PL_scopestack_max = c->scopestack_max;
341	PL_savestack = c->savestack;	299	PL_savestack = c->savestack;
342	PL_savestack_ix = c->savestack_ix;	300	PL_savestack_ix = c->savestack_ix;
343	PL_savestack_max = c->savestack_max;	301	PL_savestack_max = c->savestack_max;
		302	#if PERL_VERSION < 9
344	PL_retstack = c->retstack;	303	PL_retstack = c->retstack;
345	PL_retstack_ix = c->retstack_ix;	304	PL_retstack_ix = c->retstack_ix;
346	PL_retstack_max = c->retstack_max;	305	PL_retstack_max = c->retstack_max;
		306	#endif
		307	PL_curpm = c->curpm;
347	PL_curcop = c->curcop;	308	PL_curcop = c->curcop;
348	PL_top_env = c->top_env;
349		309
350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	310	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	311	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
352	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	312	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
353		313
…		…
360	{	320	{
361	AV *padlist = (AV *)POPs;	321	AV *padlist = (AV *)POPs;
362		322
363	if (padlist)	323	if (padlist)
364	{	324	{
365	put_padlist (cv); /* mark this padlist as available */	325	put_padlist (aTHX_ cv); /* mark this padlist as available */
366	CvPADLIST(cv) = padlist;	326	CvPADLIST(cv) = padlist;
367	}	327	}
368		328
369	++CvDEPTH(cv);	329	++CvDEPTH(cv);
370	}	330	}
…		…
410	}	370	}
411		371
412	PUSHs ((SV *)CvPADLIST(cv));	372	PUSHs ((SV *)CvPADLIST(cv));
413	PUSHs ((SV *)cv);	373	PUSHs ((SV *)cv);
414		374
415	get_padlist (cv); /* this is a monster */	375	get_padlist (aTHX_ cv);
416	}	376	}
417	}	377	}
418	#ifdef CXt_FORMAT	378	#ifdef CXt_FORMAT
419	else if (CxTYPE(cx) == CXt_FORMAT)	379	else if (CxTYPE(cx) == CXt_FORMAT)
420	{	380	{
…		…
448	c->mainstack = PL_mainstack;	408	c->mainstack = PL_mainstack;
449	c->stack_sp = PL_stack_sp;	409	c->stack_sp = PL_stack_sp;
450	c->op = PL_op;	410	c->op = PL_op;
451	c->curpad = PL_curpad;	411	c->curpad = PL_curpad;
452	c->comppad = PL_comppad;	412	c->comppad = PL_comppad;
		413	c->compcv = PL_compcv;
453	c->stack_base = PL_stack_base;	414	c->stack_base = PL_stack_base;
454	c->stack_max = PL_stack_max;	415	c->stack_max = PL_stack_max;
455	c->tmps_stack = PL_tmps_stack;	416	c->tmps_stack = PL_tmps_stack;
456	c->tmps_floor = PL_tmps_floor;	417	c->tmps_floor = PL_tmps_floor;
457	c->tmps_ix = PL_tmps_ix;	418	c->tmps_ix = PL_tmps_ix;
…		…
463	c->scopestack_ix = PL_scopestack_ix;	424	c->scopestack_ix = PL_scopestack_ix;
464	c->scopestack_max = PL_scopestack_max;	425	c->scopestack_max = PL_scopestack_max;
465	c->savestack = PL_savestack;	426	c->savestack = PL_savestack;
466	c->savestack_ix = PL_savestack_ix;	427	c->savestack_ix = PL_savestack_ix;
467	c->savestack_max = PL_savestack_max;	428	c->savestack_max = PL_savestack_max;
		429	#if PERL_VERSION < 9
468	c->retstack = PL_retstack;	430	c->retstack = PL_retstack;
469	c->retstack_ix = PL_retstack_ix;	431	c->retstack_ix = PL_retstack_ix;
470	c->retstack_max = PL_retstack_max;	432	c->retstack_max = PL_retstack_max;
		433	#endif
		434	c->curpm = PL_curpm;
471	c->curcop = PL_curcop;	435	c->curcop = PL_curcop;
472	c->top_env = PL_top_env;
473	}	436	}
474		437
475	/*	438	/*
476	* allocate various perl stacks. This is an exact copy	439	* allocate various perl stacks. This is an exact copy
477	* of perl.c:init_stacks, except that it uses less memory	440	* of perl.c:init_stacks, except that it uses less memory
478	* on the (sometimes correct) assumption that coroutines do	441	* on the (sometimes correct) assumption that coroutines do
479	* not usually need a lot of stackspace.	442	* not usually need a lot of stackspace.
480	*/	443	*/
481	STATIC void	444	static void
482	coro_init_stacks (pTHX)	445	coro_init_stacks (pTHX)
483	{	446	{
484	LOCK;	447	LOCK;
485		448
486	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	449	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
…		…
511		474
512	New(54,PL_savestack,96,ANY);	475	New(54,PL_savestack,96,ANY);
513	PL_savestack_ix = 0;	476	PL_savestack_ix = 0;
514	PL_savestack_max = 96;	477	PL_savestack_max = 96;
515		478
		479	#if PERL_VERSION < 9
516	New(54,PL_retstack,8,OP*);	480	New(54,PL_retstack,8,OP*);
517	PL_retstack_ix = 0;	481	PL_retstack_ix = 0;
518	PL_retstack_max = 8;	482	PL_retstack_max = 8;
		483	#endif
519		484
520	UNLOCK;	485	UNLOCK;
521	}	486	}
522		487
523	/*	488	/*
524	* destroy the stacks, the callchain etc...	489	* destroy the stacks, the callchain etc...
525	*/	490	*/
526	STATIC void	491	static void
527	destroy_stacks(pTHX)	492	destroy_stacks(pTHX)
528	{	493	{
529	if (!IN_DESTRUCT)	494	if (!IN_DESTRUCT)
530	{	495	{
531	/* is this ugly, I ask? */	496	/* is this ugly, I ask? */
532	LEAVE_SCOPE (0);	497	LEAVE_SCOPE (0);
533		498
534	/* sure it is, but more important: is it correct?? :/ */	499	/* sure it is, but more important: is it correct?? :/ */
535	FREETMPS;	500	FREETMPS;
		501
		502	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
536	}	503	}
537		504
538	while (PL_curstackinfo->si_next)	505	while (PL_curstackinfo->si_next)
539	PL_curstackinfo = PL_curstackinfo->si_next;	506	PL_curstackinfo = PL_curstackinfo->si_next;
540		507
541	while (PL_curstackinfo)	508	while (PL_curstackinfo)
542	{	509	{
543	PERL_SI *p = PL_curstackinfo->si_prev;	510	PERL_SI *p = PL_curstackinfo->si_prev;
544		511
545	{	512	{ /*D*//*remove*/
546	dSP;	513	dSP;
547	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
548	PUTBACK; /* possibly superfluous */	515	PUTBACK; /* possibly superfluous */
549	}	516	}
550		517
551	if (!IN_DESTRUCT)	518	if (!IN_DESTRUCT)
552	{	519	{
553	dounwind(-1);	520	dounwind (-1);/*D*//*remove*/
554	SvREFCNT_dec(PL_curstackinfo->si_stack);	521	SvREFCNT_dec (PL_curstackinfo->si_stack);
555	}	522	}
556		523
557	Safefree(PL_curstackinfo->si_cxstack);	524	Safefree (PL_curstackinfo->si_cxstack);
558	Safefree(PL_curstackinfo);	525	Safefree (PL_curstackinfo);
559	PL_curstackinfo = p;	526	PL_curstackinfo = p;
560	}	527	}
561		528
562	Safefree(PL_tmps_stack);	529	Safefree (PL_tmps_stack);
563	Safefree(PL_markstack);	530	Safefree (PL_markstack);
564	Safefree(PL_scopestack);	531	Safefree (PL_scopestack);
565	Safefree(PL_savestack);	532	Safefree (PL_savestack);
		533	#if PERL_VERSION < 9
566	Safefree(PL_retstack);	534	Safefree (PL_retstack);
567	}
568
569	static void
570	allocate_stack (Coro__State ctx, int alloc)
571	{
572	coro_stack *stack;
573
574	New (0, stack, 1, coro_stack);
575
576	stack->refcnt = 1;
577	stack->usecnt = 1;
578	stack->gencnt = ctx->gencnt = 0;
579
580	if (alloc)
581	{
582	#if HAVE_MMAP
583	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
584	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
585	if (stack->sptr == (void *)-1)
586	#endif	535	#endif
587	{
588	/*FIXME*//*D*//* reasonable stack size! */
589	stack->ssize = - (8192 * sizeof (long));
590	New (0, stack->sptr, 8192, long);
591	}
592	}
593	else
594	stack->sptr = 0;
595
596	ctx->stack = stack;
597	}	536	}
598		537
599	static void	538	static void
600	deallocate_stack (Coro__State ctx)	539	setup_coro (struct coro *coro)
601	{
602	coro_stack *stack = ctx->stack;
603
604	ctx->stack = 0;
605
606	if (stack)
607	{
608	if (!--stack->refcnt)
609	{
610	#ifdef HAVE_MMAP
611	if (stack->ssize > 0 && stack->sptr)
612	munmap (stack->sptr, stack->ssize);
613	else
614	#endif
615	Safefree (stack->sptr);
616
617	Safefree (stack);
618	}
619	else if (ctx->gencnt == stack->gencnt)
620	--stack->usecnt;
621	}
622	}
623
624	static void
625	setup_coro (void *arg)
626	{	540	{
627	/*	541	/*
628	* emulate part of the perl startup here.	542	* emulate part of the perl startup here.
629	*/	543	*/
		544	dTHX;
630	dSP;	545	dSP;
631	Coro__State ctx = (Coro__State)arg;	546	UNOP myop;
632	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);	547	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
633		548
634	coro_init_stacks (aTHX);	549	coro_init_stacks (aTHX);
635	/*PL_curcop = 0;*/	550	/*PL_curcop = 0;*/
636	/*PL_in_eval = PL_in_eval;*/ /* inherit */	551	/*PL_in_eval = PL_in_eval;*/ /* inherit */
637	SvREFCNT_dec (GvAV (PL_defgv));	552	SvREFCNT_dec (GvAV (PL_defgv));
638	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	553	GvAV (PL_defgv) = coro->args; coro->args = 0;
639		554
640	SPAGAIN;	555	SPAGAIN;
641		556
642	if (ctx->stack)
643	{
644	ctx->cursp = 0;
645
646	PUSHMARK(SP);
647	PUTBACK;
648	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
649
650	if (SvTRUE (ERRSV))
651	croak (NULL);
652	else
653	croak ("FATAL: CCTXT coroutine returned!");
654	}
655	else
656	{
657	UNOP myop;
658
659	PL_op = (OP *)&myop;
660
661	Zero(&myop, 1, UNOP);	557	Zero (&myop, 1, UNOP);
662	myop.op_next = Nullop;	558	myop.op_next = Nullop;
663	myop.op_flags = OPf_WANT_VOID;	559	myop.op_flags = OPf_WANT_VOID;
664		560
		561	PL_op = (OP *)&myop;
		562
665	PUSHMARK(SP);	563	PUSHMARK(SP);
666	XPUSHs (sub_init);	564	XPUSHs (sub_init);
667	/*
668	* the next line is slightly wrong, as PL_op->op_next
669	* is actually being executed so we skip the first op.
670	* that doesn't matter, though, since it is only
671	* pp_nextstate and we never return...
672	* ah yes, and I don't care anyways ;)
673	*/
674	PUTBACK;	565	PUTBACK;
675	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
676	SPAGAIN;	567	SPAGAIN;
677		568
678	ENTER; /* necessary e.g. for dounwind */	569	ENTER; /* necessary e.g. for dounwind */
679	}
680	}	570	}
681		571
682	static void	572	static void
683	continue_coro (void *arg)	573	free_coro_mortal ()
684	{	574	{
685	/*
686	* this is a _very_ stripped down perl interpreter ;)
687	*/
688	Coro__State ctx = (Coro__State)arg;
689	JMPENV coro_start_env;
690
691	PL_top_env = &ctx->start_env;
692
693	ctx->cursp = 0;
694	PL_op = PL_op->op_next;
695	CALLRUNOPS(aTHX);
696
697	abort ();
698	}
699
700	STATIC void
701	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
702	{
703	dSTACKLEVEL;
704
705	if (prev != next)
706	{
707	if (next->mainstack)
708	{
709	LOCK;
710	SAVE (prev, flags);
711	LOAD (next);
712	UNLOCK;
713
714	/* mark this state as in-use */
715	next->mainstack = 0;
716	next->tmps_ix = -2;
717
718	/* stacklevel changed? if yes, grab the stack for us! */
719	if (flags & TRANSFER_SAVE_CCTXT)
720	{
721	if (!prev->stack)
722	allocate_stack (prev, 0);
723	else if (prev->cursp != stacklevel
724	&& prev->stack->usecnt > 1)
725	{
726	prev->gencnt = ++prev->stack->gencnt;
727	prev->stack->usecnt = 1;
728	}
729
730	/* has our stack been invalidated? */
731	if (next->stack && next->stack->gencnt != next->gencnt)
732	{
733	deallocate_stack (next);
734	allocate_stack (next, 1);
735	coro_create (&(next->stack->cctx),
736	continue_coro, (void *)next,
737	next->stack->sptr, labs (next->stack->ssize));
738	}
739
740	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
741	prev->cursp = stacklevel;
742	/* don't add any code here */
743	}
744	else
745	next->cursp = stacklevel;
746	}
747	else if (next->tmps_ix == -2)
748	croak ("tried to transfer to running coroutine");
749	else
750	{
751	LOCK;
752	SAVE (prev, -1); /* first get rid of the old state */
753	UNLOCK;
754
755	if (flags & TRANSFER_SAVE_CCTXT)
756	{
757	if (!prev->stack)
758	allocate_stack (prev, 0);
759
760	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
761	{
762	PL_top_env = &next->start_env;
763
764	setup_coro (next);
765	next->cursp = stacklevel;
766
767	prev->stack->refcnt++;
768	prev->stack->usecnt++;
769	next->stack = prev->stack;
770	next->gencnt = prev->gencnt;
771	}
772	else
773	{
774	assert (!next->stack);
775	allocate_stack (next, 1);
776	coro_create (&(next->stack->cctx),
777	setup_coro, (void *)next,
778	next->stack->sptr, labs (next->stack->ssize));
779	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
780	prev->cursp = stacklevel;
781	/* don't add any code here */
782	}
783	}
784	else
785	{
786	setup_coro (next);
787	next->cursp = stacklevel;
788	}
789	}
790	}
791
792	LOCK;
793	if (coro_mortal)	575	if (coro_mortal)
794	{	576	{
795	SvREFCNT_dec (coro_mortal);	577	SvREFCNT_dec (coro_mortal);
796	coro_mortal = 0;	578	coro_mortal = 0;
797	}	579	}
		580	}
		581
		582	static void
		583	coro_run (void *arg)
		584	{
		585	/*
		586	* this is a _very_ stripped down perl interpreter ;)
		587	*/
		588	dTHX;
		589	PL_top_env = &PL_start_env;
		590
798	UNLOCK;	591	UNLOCK;
799	}
800		592
801	#define SV_CORO(sv,func) \	593	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
802	do { \	594	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
803	if (SvROK (sv)) \	595	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
804	sv = SvRV (sv); \
805	\
806	if (SvTYPE (sv) == SVt_PVHV) \
807	{ \
808	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
809	\
810	if (!he) \
811	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
812	\
813	(sv) = SvRV (HeVAL(he)); \
814	} \
815	\
816	/* must also be changed inside Coro::Cont::yield */ \
817	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
818	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
819	\
820	} while(0)
821		596
822	#define SvSTATE(sv) (struct coro *)SvIV (sv)	597	/* somebody will hit me for both perl_run and PL_restart_op */
		598	perl_run (aTHX_ PERL_GET_CONTEXT);
823		599
		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; /* mmap should do allocate-on-write for us */
		613	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		614
		615	if (stack->sptr == (void *)-1)
		616	{
		617	perror ("FATAL: unable to mmap stack for coroutine");
		618	_exit (EXIT_FAILURE);
		619	}
		620
		621	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		622
		623	#else
		624
		625	stack->ssize = STACKSIZE * (long)sizeof (long);
		626	New (0, stack->sptr, STACKSIZE, long);
		627
		628	if (!stack->sptr)
		629	{
		630	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		631	_exit (EXIT_FAILURE);
		632	}
		633
		634	#endif
		635
		636	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		637
		638	return stack;
		639	}
		640
		641	static void
		642	stack_free (coro_stack *stack)
		643	{
		644	if (!stack || stack == main_stack)
		645	return;
		646
		647	#if HAVE_MMAP
		648	munmap (stack->sptr, stack->ssize);
		649	#else
		650	Safefree (stack->sptr);
		651	#endif
		652
		653	Safefree (stack);
		654	}
		655
		656	static coro_stack *stack_first;
		657
		658	static coro_stack *
		659	stack_get ()
		660	{
		661	coro_stack *stack;
		662
		663	if (stack_first)
		664	{
		665	stack = stack_first;
		666	stack_first = stack->next;
		667	}
		668	else
		669	{
		670	stack = stack_new ();
		671	PL_op = PL_op->op_next;
		672	}
		673
		674	return stack;
		675	}
		676
		677	static void
		678	stack_put (coro_stack *stack)
		679	{
		680	stack->next = stack_first;
		681	stack_first = stack;
		682	}
		683
		684	/* never call directly, always through the coro_state_transfer global variable */
		685	static void
		686	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
		687	{
		688	dSTACKLEVEL;
		689
		690	/* sometimes transfer is only called to set idle_sp */
		691	if (flags == TRANSFER_SET_STACKLEVEL)
		692	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		693	else if (prev != next)
		694	{
		695	coro_stack *prev__stack;
		696
		697	LOCK;
		698
		699	if (next->mainstack)
		700	{
		701	/* coroutine already started */
		702	SAVE (prev, flags);
		703	LOAD (next);
		704	}
		705	else
		706	{
		707	/* need to start coroutine */
		708	/* first get rid of the old state */
		709	SAVE (prev, -1);
		710	/* setup coroutine call */
		711	setup_coro (next);
		712	/* need a stack */
		713	next->stack = 0;
		714	}
		715
		716	prev__stack = prev->stack;
		717
		718	/* possibly "free" the stack */
		719	if (prev__stack->idle_sp == STACKLEVEL)
		720	{
		721	stack_put (prev__stack);
		722	prev->stack = 0;
		723	}
		724
		725	if (!next->stack)
		726	next->stack = stack_get ();
		727
		728	if (prev__stack != next->stack)
		729	{
		730	prev__stack->top_env = PL_top_env;
		731	PL_top_env = next->stack->top_env;
		732	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		733	}
		734
		735	free_coro_mortal ();
		736
		737	UNLOCK;
		738	}
		739	}
		740
		741	/* use this function pointer to call the above function */
		742	/* this is done to increase chances of the compiler not inlining the call */
		743	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
		744	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
		745
		746	struct transfer_args
		747	{
		748	struct coro *prev, *next;
		749	int flags;
		750	};
		751
		752	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
		753
		754	static void
		755	coro_state_destroy (struct coro *coro)
		756	{
		757	if (coro->refcnt--)
		758	return;
		759
		760	if (coro->mainstack && coro->mainstack != main_mainstack)
		761	{
		762	struct coro temp;
		763
		764	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
		765	LOAD (aTHX_ coro);
		766
		767	destroy_stacks (aTHX);
		768
		769	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		770
		771	coro->mainstack = 0;
		772	}
		773
		774	stack_free (coro->stack);
		775	SvREFCNT_dec (coro->args);
		776	Safefree (coro);
		777	}
		778
824	static void	779	static int
		780	coro_state_clear (SV *sv, MAGIC *mg)
		781	{
		782	struct coro *coro = (struct coro *)mg->mg_ptr;
		783	mg->mg_ptr = 0;
		784
		785	coro_state_destroy (coro);
		786
		787	return 0;
		788	}
		789
		790	static int
		791	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)
		792	{
		793	struct coro *coro = (struct coro *)mg->mg_ptr;
		794
		795	++coro->refcnt;
		796
		797	return 0;
		798	}
		799
		800	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
		801
		802	static struct coro *
		803	SvSTATE (SV *coro)
		804	{
		805	HV *stash;
		806	MAGIC *mg;
		807
		808	if (SvROK (coro))
		809	coro = SvRV (coro);
		810
		811	stash = SvSTASH (coro);
		812	if (stash != coro_stash && stash != coro_state_stash)
		813	{
		814	/* very slow, but rare, check */
		815	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		816	croak ("Coro::State object required");
		817	}
		818
		819	mg = SvMAGIC (coro);
		820	assert (mg->mg_type == PERL_MAGIC_ext);
		821	return (struct coro *)mg->mg_ptr;
		822	}
		823
		824	static void
		825	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)
		826	{
		827	ta->prev = SvSTATE (prev);
		828	ta->next = SvSTATE (next);
		829	ta->flags = flags;
		830	}
		831
		832	static void
825	api_transfer(pTHX_ SV *prev, SV *next, int flags)	833	api_transfer (SV *prev, SV *next, int flags)
826	{	834	{
827	SV_CORO (prev, "Coro::transfer");	835	dTHX;
828	SV_CORO (next, "Coro::transfer");	836	struct transfer_args ta;
829		837
830	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	838	prepare_transfer (aTHX_ &ta, prev, next, flags);
		839	TRANSFER (ta);
831	}	840	}
832		841
833	/** Coro ********************************************************************/	842	/** Coro ********************************************************************/
834		843
835	#define PRIO_MAX 3	844	#define PRIO_MAX 3
…		…
839	#define PRIO_IDLE -3	848	#define PRIO_IDLE -3
840	#define PRIO_MIN -4	849	#define PRIO_MIN -4
841		850
842	/* for Coro.pm */	851	/* for Coro.pm */
843	static GV *coro_current, *coro_idle;	852	static GV *coro_current, *coro_idle;
844	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	853	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
845	static int coro_nready;	854	static int coro_nready;
846		855
847	static void	856	static void
848	coro_enq (SV *sv)	857	coro_enq (pTHX_ SV *sv)
849	{	858	{
		859	int prio;
		860
850	if (SvTYPE (sv) == SVt_PVHV)	861	if (SvTYPE (sv) != SVt_PVHV)
851	{
852	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
853	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
854
855	prio = prio > PRIO_MAX ? PRIO_MAX
856	: prio < PRIO_MIN ? PRIO_MIN
857	: prio;
858
859	av_push (coro_ready [prio - PRIO_MIN], sv);
860	coro_nready++;
861
862	return;
863	}
864
865	croak ("Coro::ready tried to enqueue something that is not a coroutine");	862	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		863
		864	prio = SvSTATE (sv)->prio;
		865
		866	av_push (coro_ready [prio - PRIO_MIN], sv);
		867	coro_nready++;
866	}	868	}
867		869
868	static SV *	870	static SV *
869	coro_deq (int min_prio)	871	coro_deq (pTHX_ int min_prio)
870	{	872	{
871	int prio = PRIO_MAX - PRIO_MIN;	873	int prio = PRIO_MAX - PRIO_MIN;
872		874
873	min_prio -= PRIO_MIN;	875	min_prio -= PRIO_MIN;
874	if (min_prio < 0)	876	if (min_prio < 0)
875	min_prio = 0;	877	min_prio = 0;
876		878
877	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	879	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
878	if (av_len (coro_ready[prio]) >= 0)	880	if (AvFILLp (coro_ready [prio]) >= 0)
879	{	881	{
880	coro_nready--;	882	coro_nready--;
881	return av_shift (coro_ready[prio]);	883	return av_shift (coro_ready [prio]);
882	}	884	}
883		885
884	return 0;	886	return 0;
885	}	887	}
886		888
887	static void	889	static void
888	api_ready (SV *coro)	890	api_ready (SV *coro)
889	{	891	{
		892	dTHX;
		893
890	if (SvROK (coro))	894	if (SvROK (coro))
891	coro = SvRV (coro);	895	coro = SvRV (coro);
892		896
893	LOCK;	897	LOCK;
894	coro_enq (SvREFCNT_inc (coro));	898	coro_enq (aTHX_ SvREFCNT_inc (coro));
895	UNLOCK;	899	UNLOCK;
896	}	900	}
897		901
898	static void	902	static void
		903	prepare_schedule (aTHX_ struct transfer_args *ta)
		904	{
		905	SV *current, *prev, *next;
		906
		907	LOCK;
		908
		909	current = GvSV (coro_current);
		910
		911	for (;;)
		912	{
		913	LOCK;
		914
		915	next = coro_deq (aTHX_ PRIO_MIN);
		916
		917	if (next)
		918	break;
		919
		920	UNLOCK;
		921
		922	{
		923	dSP;
		924
		925	ENTER;
		926	SAVETMPS;
		927
		928	PUSHMARK (SP);
		929	PUTBACK;
		930	call_sv (GvSV (coro_idle), G_DISCARD);
		931
		932	FREETMPS;
		933	LEAVE;
		934	}
		935	}
		936
		937	prev = SvRV (current);
		938	SvRV (current) = next;
		939
		940	/* free this only after the transfer */
		941	free_coro_mortal ();
		942	coro_mortal = prev;
		943
		944	ta->prev = SvSTATE (prev);
		945	ta->next = SvSTATE (next);
		946	ta->flags = TRANSFER_SAVE_ALL;
		947
		948	UNLOCK;
		949	}
		950
		951	static void
		952	prepare_cede (aTHX_ struct transfer_args *ta)
		953	{
		954	LOCK;
		955	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
		956	UNLOCK;
		957
		958	prepare_schedule (ta);
		959	}
		960
		961	static void
899	api_schedule (void)	962	api_schedule (void)
900	{	963	{
901	SV *prev, *next;	964	dTHX;
		965	struct transfer_args ta;
902		966
903	LOCK;	967	prepare_schedule (&ta);
904		968	TRANSFER (ta);
905	prev = SvRV (GvSV (coro_current));
906	next = coro_deq (PRIO_MIN);
907
908	if (!next)
909	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
910
911	/* free this only after the transfer */
912	coro_mortal = prev;
913	SV_CORO (prev, "Coro::schedule");
914
915	SvRV (GvSV (coro_current)) = next;
916
917	SV_CORO (next, "Coro::schedule");
918
919	UNLOCK;
920
921	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
922	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
923	}	969	}
924		970
925	static void	971	static void
926	api_cede (void)	972	api_cede (void)
927	{	973	{
928	LOCK;	974	dTHX;
929	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	975	struct transfer_args ta;
930	UNLOCK;
931		976
932	api_schedule ();	977	prepare_cede (&ta);
		978	TRANSFER (ta);
933	}	979	}
934		980
935	MODULE = Coro::State PACKAGE = Coro::State	981	MODULE = Coro::State PACKAGE = Coro::State
936		982
937	PROTOTYPES: ENABLE	983	PROTOTYPES: DISABLE
938		984
939	BOOT:	985	BOOT:
940	{ /* {} necessary for stoopid perl-5.6.x */	986	{
941	#ifdef USE_ITHREADS	987	#ifdef USE_ITHREADS
942	MUTEX_INIT (&coro_mutex);	988	MUTEX_INIT (&coro_mutex);
943	#endif	989	#endif
		990	BOOT_PAGESIZE;
944		991
945	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
946	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
947	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	992	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
948		993
949	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	994	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
950	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	995	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
951	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	996	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
952	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
953		997
954	main_mainstack = PL_mainstack;	998	main_mainstack = PL_mainstack;
955		999
956	coroapi.ver = CORO_API_VERSION;	1000	coroapi.ver = CORO_API_VERSION;
957	coroapi.transfer = api_transfer;	1001	coroapi.transfer = api_transfer;
958	}
959		1002
960	Coro::State	1003	Newz (0, main_stack, 1, coro_stack);
961	_newprocess(args)	1004	main_stack->idle_sp = (void *)-1;
962	SV * args	1005
963	PROTOTYPE: $	1006	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1007	}
		1008
		1009	SV *
		1010	new (char *klass, ...)
964	CODE:	1011	CODE:
965	Coro__State coro;	1012	{
		1013	struct coro *coro;
		1014	HV *hv;
		1015	int i;
966		1016
967	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
968	croak ("Coro::State::_newprocess expects an arrayref");
969
970	Newz (0, coro, 1, struct coro);	1017	Newz (0, coro, 1, struct coro);
		1018	coro->args = newAV ();
971		1019
972	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1020	hv = newHV ();
		1021	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1022	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1023
		1024	for (i = 1; i < items; i++)
		1025	av_push (coro->args, newSVsv (ST (i)));
		1026
		1027	coro->stack = main_stack;
973	coro->mainstack = 0; /* actual work is done inside transfer */	1028	/*coro->mainstack = 0; *//*actual work is done inside transfer */
974	coro->stack = 0;	1029	/*coro->stack = 0;*/
975		1030	}
976	/* same as JMPENV_BOOTSTRAP */
977	/* we might be able to recycle start_env, but safe is safe */
978	//Zero(&coro->start_env, 1, JMPENV);
979	coro->start_env.je_ret = -1;
980	coro->start_env.je_mustcatch = TRUE;
981
982	RETVAL = coro;
983	OUTPUT:	1031	OUTPUT:
984	RETVAL	1032	RETVAL
985		1033
986	void	1034	void
987	transfer(prev, next, flags)	1035	transfer (...)
988	SV *prev	1036	ALIAS:
989	SV *next	1037	Coro::schedule = 1
990	int flags	1038	Coro::cede = 2
991	PROTOTYPE: @	1039	_set_stacklevel = 3
992	CODE:	1040	CODE:
993	PUTBACK;	1041	{
994	SV_CORO (next, "Coro::transfer");	1042	struct transfer_args ta;
995	SV_CORO (prev, "Coro::transfer");	1043
996	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1044	switch (ix)
997	SPAGAIN;	1045	{
		1046	case 0:
		1047	if (items != 3)
		1048	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1049
		1050	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1051	break;
		1052
		1053	case 1:
		1054	prepare_schedule (&ta);
		1055	break;
		1056
		1057	case 2:
		1058	prepare_cede (&ta);
		1059	break;
		1060
		1061	case 3:
		1062	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
		1063	ta.next = 0;
		1064	ta.flags = TRANSFER_SET_STACKLEVEL;
		1065	break;
		1066	}
		1067
		1068	TRANSFER (ta);
		1069	}
998		1070
999	void	1071	void
1000	DESTROY(coro)	1072	_clone_state_from (SV *dst, SV *src)
1001	Coro::State coro	1073	CODE:
1002	CODE:	1074	{
		1075	struct coro *coro_src = SvSTATE (src);
1003		1076
1004	if (coro->mainstack && coro->mainstack != main_mainstack)	1077	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1005	{
1006	struct coro temp;
1007		1078
1008	PUTBACK;	1079	++coro_src->refcnt;
1009	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1080	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1010	LOAD(aTHX_ coro);	1081	}
1011	SPAGAIN;
1012
1013	destroy_stacks (aTHX);
1014
1015	LOAD((&temp)); /* this will get rid of defsv etc.. */
1016	SPAGAIN;
1017
1018	coro->mainstack = 0;
1019	}
1020
1021	deallocate_stack (coro);
1022	SvREFCNT_dec (coro->args);
1023	Safefree (coro);
1024		1082
1025	void	1083	void
		1084	_nonlocal_goto (IV nextop)
		1085	CODE:
		1086	/* uuh, somebody will kill me again for this */
		1087	PL_op->op_next = INT2PTR (OP *, nextop);
		1088
		1089	void
1026	_exit(code)	1090	_exit (code)
1027	int code	1091	int code
1028	PROTOTYPE: $	1092	PROTOTYPE: $
1029	CODE:	1093	CODE:
1030	_exit (code);	1094	_exit (code);
1031		1095
1032	MODULE = Coro::State PACKAGE = Coro::Cont	1096	MODULE = Coro::State PACKAGE = Coro::Cont
1033		1097
1034	# this is slightly dirty (should expose a c-level api)
1035
1036	void	1098	void
1037	yield(...)	1099	yield (...)
1038	PROTOTYPE: @	1100	PROTOTYPE: @
1039	CODE:	1101	CODE:
1040	static SV *returnstk;	1102	{
		1103	SV *yieldstack;
1041	SV *sv;	1104	SV *sv;
1042	AV *defav = GvAV (PL_defgv);	1105	AV *defav = GvAV (PL_defgv);
1043	struct coro *prev, *next;	1106	struct coro *prev, *next;
1044		1107
1045	if (!returnstk)	1108	yieldstack = *hv_fetch (
1046	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));	1109	(HV *)SvRV (GvSV (coro_current)),
		1110	"yieldstack", sizeof ("yieldstack") - 1,
		1111	0
		1112	);
1047		1113
1048	/* set up @_ -- ugly */	1114	/* set up @_ -- ugly */
1049	av_clear (defav);	1115	av_clear (defav);
1050	av_fill (defav, items - 1);	1116	av_fill (defav, items - 1);
1051	while (items--)	1117	while (items--)
1052	av_store (defav, items, SvREFCNT_inc (ST(items)));	1118	av_store (defav, items, SvREFCNT_inc (ST(items)));
1053		1119
1054	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1055	sv = av_pop ((AV *)SvRV (returnstk));	1120	sv = av_pop ((AV *)SvRV (yieldstack));
1056	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));	1121	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1057	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));	1122	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1058	SvREFCNT_dec (sv);	1123	SvREFCNT_dec (sv);
1059		1124
1060	transfer(aTHX_ prev, next, 0);	1125	coro_state_transfer (aTHX_ prev, next, 0);
		1126	}
1061		1127
1062	MODULE = Coro::State PACKAGE = Coro	1128	MODULE = Coro::State PACKAGE = Coro
1063		1129
1064	# this is slightly dirty (should expose a c-level api)
1065
1066	BOOT:	1130	BOOT:
1067	{	1131	{
1068	int i;	1132	int i;
		1133
1069	HV *stash = gv_stashpv ("Coro", TRUE);	1134	coro_stash = gv_stashpv ("Coro", TRUE);
1070		1135
1071	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1136	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1137	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1138	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1139	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1140	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1141	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1077		1142
1078	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1143	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1079	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1144	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1080		1145
1081	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1146	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1089	coroapi.ready = api_ready;	1154	coroapi.ready = api_ready;
1090	coroapi.nready = &coro_nready;	1155	coroapi.nready = &coro_nready;
1091	coroapi.current = coro_current;	1156	coroapi.current = coro_current;
1092		1157
1093	GCoroAPI = &coroapi;	1158	GCoroAPI = &coroapi;
1094	sv_setiv(sv, (IV)&coroapi);	1159	sv_setiv (sv, (IV)&coroapi);
1095	SvREADONLY_on(sv);	1160	SvREADONLY_on (sv);
1096	}	1161	}
1097	}	1162	}
1098		1163
1099	#if !PERL_MICRO	1164	int
		1165	prio (Coro::State coro, int newprio = 0)
		1166	ALIAS:
		1167	nice = 1
		1168	CODE:
		1169	{
		1170	RETVAL = coro->prio;
		1171
		1172	if (items > 1)
		1173	{
		1174	if (ix)
		1175	newprio += coro->prio;
		1176
		1177	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1178	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1179
		1180	coro->prio = newprio;
		1181	}
		1182	}
1100		1183
1101	void	1184	void
1102	ready(self)	1185	ready (SV *self)
1103	SV * self
1104	PROTOTYPE: $	1186	PROTOTYPE: $
1105	CODE:	1187	CODE:
1106	api_ready (self);	1188	api_ready (self);
1107		1189
1108	#endif
1109
1110	int	1190	int
1111	nready(...)	1191	nready (...)
1112	PROTOTYPE:	1192	PROTOTYPE:
1113	CODE:	1193	CODE:
1114	RETVAL = coro_nready;	1194	RETVAL = coro_nready;
1115	OUTPUT:	1195	OUTPUT:
1116	RETVAL	1196	RETVAL
1117		1197
		1198	MODULE = Coro::State PACKAGE = Coro::AIO
		1199
		1200	SV *
		1201	_get_state ()
		1202	CODE:
		1203	{
		1204	struct {
		1205	int errorno;
		1206	int laststype;
		1207	int laststatval;
		1208	Stat_t statcache;
		1209	} data;
		1210
		1211	data.errorno = errno;
		1212	data.laststype = PL_laststype;
		1213	data.laststatval = PL_laststatval;
		1214	data.statcache = PL_statcache;
		1215
		1216	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1217	}
		1218	OUTPUT:
		1219	RETVAL
		1220
1118	void	1221	void
1119	schedule(...)	1222	_set_state (char *data_)
1120	PROTOTYPE:	1223	PROTOTYPE: $
1121	CODE:	1224	CODE:
1122	api_schedule ();	1225	{
		1226	struct {
		1227	int errorno;
		1228	int laststype;
		1229	int laststatval;
		1230	Stat_t statcache;
		1231	} *data = (void *)data_;
1123		1232
1124	void	1233	errno = data->errorno;
1125	cede(...)	1234	PL_laststype = data->laststype;
1126	PROTOTYPE:	1235	PL_laststatval = data->laststatval;
1127	CODE:	1236	PL_statcache = data->statcache;
1128	api_cede ();	1237	}
1129

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