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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.57 by pcg, Thu Apr 22 04:14:49 2004 UTC vs.
Revision 1.93 by root, Sun Nov 26 03:22:50 2006 UTC

1	#define PERL_NO_GET_CONTEXT	1	#define PERL_NO_GET_CONTEXT
		2
		3	#include "libcoro/coro.c"
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#if PATCHLEVEL < 6	11	#if PERL_VERSION < 6
10	# ifndef PL_ppaddr	12	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	13	# define PL_ppaddr ppaddr
12	# endif	14	# endif
13	# ifndef call_sv	15	# ifndef call_sv
14	# define call_sv perl_call_sv	16	# define call_sv perl_call_sv
…		…
25	# ifndef IS_PADCONST	27	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	28	# define IS_PADCONST(v) 0
27	# endif	29	# endif
28	#endif	30	#endif
29		31
30	#include "libcoro/coro.c"
31
32	#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
33		42
34	#ifdef HAVE_MMAP	43	#ifdef HAVE_MMAP
35	# include <unistd.h>	44	# include <unistd.h>
36	# include <sys/mman.h>	45	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS	46	# ifndef MAP_ANONYMOUS
…		…
39	# define MAP_ANONYMOUS MAP_ANON	48	# define MAP_ANONYMOUS MAP_ANON
40	# else	49	# else
41	# undef HAVE_MMAP	50	# undef HAVE_MMAP
42	# endif	51	# endif
43	# 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
44	#endif	60	# endif
45		61	#endif
46	#define SUB_INIT "Coro::State::initialize"
47	#define UCORO_STATE "_coro_state"
48		62
49	/* 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
50	* 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
51	* and should be unique. */	65	* and should be unique. */
		66	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	67	#define STACKLEVEL ((void *)&stacklevel)
53		68
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	69	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		70
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	71	#define labs(l) ((l) >= 0 ? (l) : -(l))
57		72
58	#include "CoroAPI.h"	73	#include "CoroAPI.h"
		74
		75	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59		76
60	#ifdef USE_ITHREADS	77	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	78	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	79	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	80	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	81	#else
65	# define LOCK 0	82	# define LOCK (void)0
66	# define UNLOCK 0	83	# define UNLOCK (void)0
67	#endif	84	#endif
68		85
69	static struct CoroAPI coroapi;	86	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	87	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	88	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static __thread SV *coro_mortal; /* will be freed after next transfer */	89	static SV *coro_mortal; /* will be freed after next transfer */
75		90
76	/* this is actually not only the c stack but also c registers etc... */	91	/* this is a structure representing a c-level coroutine */
77	typedef struct {	92	typedef struct coro_stack {
78	int refcnt; /* pointer reference counter */	93	struct coro_stack *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		94
82	coro_context cctx;	95	/* the stack */
83
84	void *sptr;	96	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	97	long ssize; /* positive == mmap, otherwise malloc */
		98
		99	/* cpu state */
		100	void *idle_sp; /* original stacklevel when coroutine was created */
		101	JMPENV *top_env;
		102	coro_context cctx;
86	} coro_stack;	103	} coro_stack;
87		104
		105	/* the (fake) coro_stack representing the main program */
		106	static coro_stack *main_stack;
		107
		108	/* this is a structure representing a perl-level coroutine */
88	struct coro {	109	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	110	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;
91
92	/* the optional C context */
93	coro_stack *stack;	111	coro_stack *stack;
94	void *cursp;	112
		113	/* data associated with this coroutine (initial args) */
		114	AV *args;
95	int gencnt;	115	int refcnt;
96		116
97	/* optionally saved, might be zero */	117	/* optionally saved, might be zero */
98	AV *defav;	118	AV *defav;
99	SV *defsv;	119	SV *defsv;
100	SV *errsv;	120	SV *errsv;
…		…
109	AV *mainstack;	129	AV *mainstack;
110	SV **stack_sp;	130	SV **stack_sp;
111	OP *op;	131	OP *op;
112	SV **curpad;	132	SV **curpad;
113	AV *comppad;	133	AV *comppad;
		134	CV *compcv;
114	SV **stack_base;	135	SV **stack_base;
115	SV **stack_max;	136	SV **stack_max;
116	SV **tmps_stack;	137	SV **tmps_stack;
117	I32 tmps_floor;	138	I32 tmps_floor;
118	I32 tmps_ix;	139	I32 tmps_ix;
…		…
127	I32 savestack_ix;	148	I32 savestack_ix;
128	I32 savestack_max;	149	I32 savestack_max;
129	OP **retstack;	150	OP **retstack;
130	I32 retstack_ix;	151	I32 retstack_ix;
131	I32 retstack_max;	152	I32 retstack_max;
		153	PMOP *curpm;
132	COP *curcop;	154	COP *curcop;
133	JMPENV *top_env;
134		155
135	/* data associated with this coroutine (initial args) */	156	/* coro process data */
136	AV *args;	157	int prio;
137	};	158	};
138		159
139	typedef struct coro *Coro__State;	160	typedef struct coro *Coro__State;
140	typedef struct coro *Coro__State_or_hashref;	161	typedef struct coro *Coro__State_or_hashref;
141		162
142	/* mostly copied from op.c:cv_clone2 */	163	static AV *
143	STATIC AV *	164	coro_clone_padlist (pTHX_ CV *cv)
144	clone_padlist (pTHX_ AV *protopadlist)
145	{	165	{
146	AV *av;	166	AV *padlist = CvPADLIST (cv);
147	I32 ix;
148	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
149	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
150	SV **pname = AvARRAY (protopad_name);
151	SV **ppad = AvARRAY (protopad);
152	I32 fname = AvFILLp (protopad_name);
153	I32 fpad = AvFILLp (protopad);
154	AV *newpadlist, *newpad_name, *newpad;	167	AV *newpadlist, *newpad;
155	SV **npad;
156
157	newpad_name = newAV ();
158	for (ix = fname; ix >= 0; ix--)
159	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161	newpad = newAV ();
162	av_fill (newpad, AvFILLp (protopad));
163	npad = AvARRAY (newpad);
164		168
165	newpadlist = newAV ();	169	newpadlist = newAV ();
166	AvREAL_off (newpadlist);	170	AvREAL_off (newpadlist);
167	av_store (newpadlist, 0, (SV *) newpad_name);	171	#if PERL_VERSION < 9
		172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		173	#else
		174	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		175	#endif
		176	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		177	--AvFILLp (padlist);
		178
		179	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
168	av_store (newpadlist, 1, (SV *) newpad);	180	av_store (newpadlist, 1, (SV *)newpad);
169
170	av = newAV (); /* will be @_ */
171	av_extend (av, 0);
172	av_store (newpad, 0, (SV *) av);
173	AvFLAGS (av) = AVf_REIFY;
174
175	for (ix = fpad; ix > 0; ix--)
176	{
177	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
178
179	if (namesv && namesv != &PL_sv_undef)
180	{
181	char *name = SvPVX (namesv); /* XXX */
182
183	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
184	{ /* lexical from outside? */
185	npad[ix] = SvREFCNT_inc (ppad[ix]);
186	}
187	else
188	{ /* our own lexical */
189	SV *sv;
190	if (*name == '&')
191	sv = SvREFCNT_inc (ppad[ix]);
192	else if (*name == '@')
193	sv = (SV *) newAV ();
194	else if (*name == '%')
195	sv = (SV *) newHV ();
196	else
197	sv = NEWSV (0, 0);
198
199	#ifdef SvPADBUSY
200	if (!SvPADBUSY (sv))
201	#endif
202	SvPADMY_on (sv);
203
204	npad[ix] = sv;
205	}
206	}
207	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
208	{
209	npad[ix] = SvREFCNT_inc (ppad[ix]);
210	}
211	else
212	{
213	SV *sv = NEWSV (0, 0);
214	SvPADTMP_on (sv);
215	npad[ix] = sv;
216	}
217	}
218
219	#if 0 /* return -ENOTUNDERSTOOD */
220	/* Now that vars are all in place, clone nested closures. */
221
222	for (ix = fpad; ix > 0; ix--) {
223	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224	if (namesv
225	&& namesv != &PL_sv_undef
226	&& !(SvFLAGS(namesv) & SVf_FAKE)
227	&& *SvPVX(namesv) == '&'
228	&& CvCLONE(ppad[ix]))
229	{
230	CV *kid = cv_clone((CV*)ppad[ix]);
231	SvREFCNT_dec(ppad[ix]);
232	CvCLONE_on(kid);
233	SvPADMY_on(kid);
234	npad[ix] = (SV*)kid;
235	}
236	}
237	#endif
238		181
239	return newpadlist;	182	return newpadlist;
240	}	183	}
241		184
242	STATIC void	185	static void
243	free_padlist (pTHX_ AV *padlist)	186	free_padlist (pTHX_ AV *padlist)
244	{	187	{
245	/* may be during global destruction */	188	/* may be during global destruction */
246	if (SvREFCNT (padlist))	189	if (SvREFCNT (padlist))
247	{	190	{
…		…
261		204
262	SvREFCNT_dec ((SV*)padlist);	205	SvREFCNT_dec ((SV*)padlist);
263	}	206	}
264	}	207	}
265		208
266	STATIC int	209	static int
267	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	210	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268	{	211	{
269	AV *padlist;	212	AV *padlist;
270	AV *av = (AV *)mg->mg_obj;	213	AV *av = (AV *)mg->mg_obj;
271		214
272	/* casting is fun. */	215	/* casting is fun. */
273	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	216	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274	free_padlist (aTHX_ padlist);	217	free_padlist (aTHX_ padlist);
		218
		219	SvREFCNT_dec (av);
		220
		221	return 0;
275	}	222	}
276		223
277	#define PERL_MAGIC_coro PERL_MAGIC_ext	224	#define PERL_MAGIC_coro PERL_MAGIC_ext
278		225
279	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	226	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
280		227
281	/* the next two functions merely cache the padlists */	228	/* the next two functions merely cache the padlists */
282	STATIC void	229	static void
283	get_padlist (pTHX_ CV *cv)	230	get_padlist (pTHX_ CV *cv)
284	{	231	{
285	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	232	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
286		233
287	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	234	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
288	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	235	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
289	else	236	else
		237	{
		238	#if 0
		239	/* this should work - but it doesn't :( */
		240	CV *cp = Perl_cv_clone (aTHX_ cv);
		241	CvPADLIST (cv) = CvPADLIST (cp);
		242	CvPADLIST (cp) = 0;
		243	SvREFCNT_dec (cp);
		244	#else
290	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	245	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		246	#endif
		247	}
291	}	248	}
292		249
293	STATIC void	250	static void
294	put_padlist (pTHX_ CV *cv)	251	put_padlist (pTHX_ CV *cv)
295	{	252	{
296	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	253	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
297		254
298	if (!mg)	255	if (!mg)
…		…
325	PL_mainstack = c->mainstack;	282	PL_mainstack = c->mainstack;
326	PL_stack_sp = c->stack_sp;	283	PL_stack_sp = c->stack_sp;
327	PL_op = c->op;	284	PL_op = c->op;
328	PL_curpad = c->curpad;	285	PL_curpad = c->curpad;
329	PL_comppad = c->comppad;	286	PL_comppad = c->comppad;
		287	PL_compcv = c->compcv;
330	PL_stack_base = c->stack_base;	288	PL_stack_base = c->stack_base;
331	PL_stack_max = c->stack_max;	289	PL_stack_max = c->stack_max;
332	PL_tmps_stack = c->tmps_stack;	290	PL_tmps_stack = c->tmps_stack;
333	PL_tmps_floor = c->tmps_floor;	291	PL_tmps_floor = c->tmps_floor;
334	PL_tmps_ix = c->tmps_ix;	292	PL_tmps_ix = c->tmps_ix;
…		…
340	PL_scopestack_ix = c->scopestack_ix;	298	PL_scopestack_ix = c->scopestack_ix;
341	PL_scopestack_max = c->scopestack_max;	299	PL_scopestack_max = c->scopestack_max;
342	PL_savestack = c->savestack;	300	PL_savestack = c->savestack;
343	PL_savestack_ix = c->savestack_ix;	301	PL_savestack_ix = c->savestack_ix;
344	PL_savestack_max = c->savestack_max;	302	PL_savestack_max = c->savestack_max;
		303	#if PERL_VERSION < 9
345	PL_retstack = c->retstack;	304	PL_retstack = c->retstack;
346	PL_retstack_ix = c->retstack_ix;	305	PL_retstack_ix = c->retstack_ix;
347	PL_retstack_max = c->retstack_max;	306	PL_retstack_max = c->retstack_max;
		307	#endif
		308	PL_curpm = c->curpm;
348	PL_curcop = c->curcop;	309	PL_curcop = c->curcop;
349	PL_top_env = c->top_env;
350		310
351	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	311	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
352	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	312	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
353	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	313	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
354		314
…		…
411	}	371	}
412		372
413	PUSHs ((SV *)CvPADLIST(cv));	373	PUSHs ((SV *)CvPADLIST(cv));
414	PUSHs ((SV *)cv);	374	PUSHs ((SV *)cv);
415		375
416	get_padlist (aTHX_ cv); /* this is a monster */	376	get_padlist (aTHX_ cv);
417	}	377	}
418	}	378	}
419	#ifdef CXt_FORMAT	379	#ifdef CXt_FORMAT
420	else if (CxTYPE(cx) == CXt_FORMAT)	380	else if (CxTYPE(cx) == CXt_FORMAT)
421	{	381	{
…		…
449	c->mainstack = PL_mainstack;	409	c->mainstack = PL_mainstack;
450	c->stack_sp = PL_stack_sp;	410	c->stack_sp = PL_stack_sp;
451	c->op = PL_op;	411	c->op = PL_op;
452	c->curpad = PL_curpad;	412	c->curpad = PL_curpad;
453	c->comppad = PL_comppad;	413	c->comppad = PL_comppad;
		414	c->compcv = PL_compcv;
454	c->stack_base = PL_stack_base;	415	c->stack_base = PL_stack_base;
455	c->stack_max = PL_stack_max;	416	c->stack_max = PL_stack_max;
456	c->tmps_stack = PL_tmps_stack;	417	c->tmps_stack = PL_tmps_stack;
457	c->tmps_floor = PL_tmps_floor;	418	c->tmps_floor = PL_tmps_floor;
458	c->tmps_ix = PL_tmps_ix;	419	c->tmps_ix = PL_tmps_ix;
…		…
464	c->scopestack_ix = PL_scopestack_ix;	425	c->scopestack_ix = PL_scopestack_ix;
465	c->scopestack_max = PL_scopestack_max;	426	c->scopestack_max = PL_scopestack_max;
466	c->savestack = PL_savestack;	427	c->savestack = PL_savestack;
467	c->savestack_ix = PL_savestack_ix;	428	c->savestack_ix = PL_savestack_ix;
468	c->savestack_max = PL_savestack_max;	429	c->savestack_max = PL_savestack_max;
		430	#if PERL_VERSION < 9
469	c->retstack = PL_retstack;	431	c->retstack = PL_retstack;
470	c->retstack_ix = PL_retstack_ix;	432	c->retstack_ix = PL_retstack_ix;
471	c->retstack_max = PL_retstack_max;	433	c->retstack_max = PL_retstack_max;
		434	#endif
		435	c->curpm = PL_curpm;
472	c->curcop = PL_curcop;	436	c->curcop = PL_curcop;
473	c->top_env = PL_top_env;
474	}	437	}
475		438
476	/*	439	/*
477	* allocate various perl stacks. This is an exact copy	440	* allocate various perl stacks. This is an exact copy
478	* of perl.c:init_stacks, except that it uses less memory	441	* of perl.c:init_stacks, except that it uses less memory
479	* on the (sometimes correct) assumption that coroutines do	442	* on the (sometimes correct) assumption that coroutines do
480	* not usually need a lot of stackspace.	443	* not usually need a lot of stackspace.
481	*/	444	*/
482	STATIC void	445	static void
483	coro_init_stacks (pTHX)	446	coro_init_stacks (pTHX)
484	{	447	{
485	LOCK;	448	LOCK;
486		449
487	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	450	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
…		…
512		475
513	New(54,PL_savestack,96,ANY);	476	New(54,PL_savestack,96,ANY);
514	PL_savestack_ix = 0;	477	PL_savestack_ix = 0;
515	PL_savestack_max = 96;	478	PL_savestack_max = 96;
516		479
		480	#if PERL_VERSION < 9
517	New(54,PL_retstack,8,OP*);	481	New(54,PL_retstack,8,OP*);
518	PL_retstack_ix = 0;	482	PL_retstack_ix = 0;
519	PL_retstack_max = 8;	483	PL_retstack_max = 8;
		484	#endif
520		485
521	UNLOCK;	486	UNLOCK;
522	}	487	}
523		488
524	/*	489	/*
525	* destroy the stacks, the callchain etc...	490	* destroy the stacks, the callchain etc...
526	*/	491	*/
527	STATIC void	492	static void
528	destroy_stacks(pTHX)	493	destroy_stacks(pTHX)
529	{	494	{
530	if (!IN_DESTRUCT)	495	if (!IN_DESTRUCT)
531	{	496	{
532	/* is this ugly, I ask? */	497	/* is this ugly, I ask? */
…		…
564		529
565	Safefree (PL_tmps_stack);	530	Safefree (PL_tmps_stack);
566	Safefree (PL_markstack);	531	Safefree (PL_markstack);
567	Safefree (PL_scopestack);	532	Safefree (PL_scopestack);
568	Safefree (PL_savestack);	533	Safefree (PL_savestack);
		534	#if PERL_VERSION < 9
569	Safefree (PL_retstack);	535	Safefree (PL_retstack);
570	}
571
572	static void
573	allocate_stack (Coro__State ctx, int alloc)
574	{
575	coro_stack *stack;
576
577	New (0, stack, 1, coro_stack);
578
579	stack->refcnt = 1;
580	stack->usecnt = 1;
581	stack->gencnt = ctx->gencnt = 0;
582
583	if (alloc)
584	{
585	#if HAVE_MMAP
586	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
587	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588	if (stack->sptr == (void *)-1)
589	#endif	536	#endif
590	{
591	/*FIXME*//*D*//* reasonable stack size! */
592	stack->ssize = - (8192 * sizeof (long));
593	New (0, stack->sptr, 8192, long);
594	}
595	}
596	else
597	stack->sptr = 0;
598
599	ctx->stack = stack;
600	}	537	}
601		538
602	static void	539	static void
603	deallocate_stack (Coro__State ctx)	540	setup_coro (struct coro *coro)
604	{
605	coro_stack *stack = ctx->stack;
606
607	ctx->stack = 0;
608
609	if (stack)
610	{
611	if (!--stack->refcnt)
612	{
613	#ifdef HAVE_MMAP
614	if (stack->ssize > 0 && stack->sptr)
615	munmap (stack->sptr, stack->ssize);
616	else
617	#endif
618	Safefree (stack->sptr);
619
620	Safefree (stack);
621	}
622	else if (ctx->gencnt == stack->gencnt)
623	--stack->usecnt;
624	}
625	}
626
627	static void
628	setup_coro (void *arg)
629	{	541	{
630	/*	542	/*
631	* emulate part of the perl startup here.	543	* emulate part of the perl startup here.
632	*/	544	*/
633	dTHX;	545	dTHX;
634	dSP;	546	dSP;
635	Coro__State ctx = (Coro__State)arg;	547	UNOP myop;
636	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);	548	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
637		549
638	coro_init_stacks (aTHX);	550	coro_init_stacks (aTHX);
639	/*PL_curcop = 0;*/	551	/*PL_curcop = 0;*/
640	/*PL_in_eval = PL_in_eval;*/ /* inherit */	552	/*PL_in_eval = PL_in_eval;*/ /* inherit */
641	SvREFCNT_dec (GvAV (PL_defgv));	553	SvREFCNT_dec (GvAV (PL_defgv));
642	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	554	GvAV (PL_defgv) = coro->args; coro->args = 0;
643		555
644	SPAGAIN;	556	SPAGAIN;
645		557
646	if (ctx->stack)
647	{
648	ctx->cursp = 0;
649
650	PUSHMARK(SP);
651	PUTBACK;
652	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
653
654	if (SvTRUE (ERRSV))
655	croak (NULL);
656	else
657	croak ("FATAL: CCTXT coroutine returned!");
658	}
659	else
660	{
661	UNOP myop;
662
663	PL_op = (OP *)&myop;
664
665	Zero(&myop, 1, UNOP);	558	Zero (&myop, 1, UNOP);
666	myop.op_next = Nullop;	559	myop.op_next = Nullop;
667	myop.op_flags = OPf_WANT_VOID;	560	myop.op_flags = OPf_WANT_VOID;
668		561
		562	PL_op = (OP *)&myop;
		563
669	PUSHMARK(SP);	564	PUSHMARK(SP);
670	XPUSHs (sub_init);	565	XPUSHs (sub_init);
671	/*
672	* the next line is slightly wrong, as PL_op->op_next
673	* is actually being executed so we skip the first op.
674	* that doesn't matter, though, since it is only
675	* pp_nextstate and we never return...
676	* ah yes, and I don't care anyways ;)
677	*/
678	PUTBACK;	566	PUTBACK;
679	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
680	SPAGAIN;	568	SPAGAIN;
681		569
682	ENTER; /* necessary e.g. for dounwind */	570	ENTER; /* necessary e.g. for dounwind */
683	}
684	}	571	}
685		572
686	static void	573	static void
687	continue_coro (void *arg)	574	free_coro_mortal ()
688	{	575	{
689	/*
690	* this is a _very_ stripped down perl interpreter ;)
691	*/
692	dTHX;
693	Coro__State ctx = (Coro__State)arg;
694	JMPENV coro_start_env;
695
696	PL_top_env = &ctx->start_env;
697
698	ctx->cursp = 0;
699	PL_op = PL_op->op_next;
700	CALLRUNOPS(aTHX);
701
702	abort ();
703	}
704
705	STATIC void
706	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
707	{
708	dSTACKLEVEL;
709
710	if (prev != next)
711	{
712	if (next->mainstack)
713	{
714	LOCK;
715	SAVE (prev, flags);
716	LOAD (next);
717	UNLOCK;
718
719	/* mark this state as in-use */
720	next->mainstack = 0;
721	next->tmps_ix = -2;
722
723	/* stacklevel changed? if yes, grab the stack for us! */
724	if (flags & TRANSFER_SAVE_CCTXT)
725	{
726	if (!prev->stack)
727	allocate_stack (prev, 0);
728	else if (prev->cursp != stacklevel
729	&& prev->stack->usecnt > 1)
730	{
731	prev->gencnt = ++prev->stack->gencnt;
732	prev->stack->usecnt = 1;
733	}
734
735	/* has our stack been invalidated? */
736	if (next->stack && next->stack->gencnt != next->gencnt)
737	{
738	deallocate_stack (next);
739	allocate_stack (next, 1);
740	coro_create (&(next->stack->cctx),
741	continue_coro, (void *)next,
742	next->stack->sptr, labs (next->stack->ssize));
743	}
744
745	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
746	prev->cursp = stacklevel;
747	/* don't add any code here */
748	}
749	else
750	next->cursp = stacklevel;
751	}
752	else if (next->tmps_ix == -2)
753	croak ("tried to transfer to running coroutine");
754	else
755	{
756	LOCK;
757	SAVE (prev, -1); /* first get rid of the old state */
758	UNLOCK;
759
760	if (flags & TRANSFER_SAVE_CCTXT)
761	{
762	if (!prev->stack)
763	allocate_stack (prev, 0);
764
765	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
766	{
767	PL_top_env = &next->start_env;
768
769	setup_coro (next);
770	next->cursp = stacklevel;
771
772	prev->stack->refcnt++;
773	prev->stack->usecnt++;
774	next->stack = prev->stack;
775	next->gencnt = prev->gencnt;
776	}
777	else
778	{
779	assert (!next->stack);
780	allocate_stack (next, 1);
781	coro_create (&(next->stack->cctx),
782	setup_coro, (void *)next,
783	next->stack->sptr, labs (next->stack->ssize));
784	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
785	prev->cursp = stacklevel;
786	/* don't add any code here */
787	}
788	}
789	else
790	{
791	setup_coro (next);
792	next->cursp = stacklevel;
793	}
794	}
795	}
796
797	LOCK;
798	if (coro_mortal)	576	if (coro_mortal)
799	{	577	{
800	SvREFCNT_dec (coro_mortal);	578	SvREFCNT_dec (coro_mortal);
801	coro_mortal = 0;	579	coro_mortal = 0;
802	}	580	}
		581	}
		582
		583	static void
		584	coro_run (void *arg)
		585	{
		586	/*
		587	* this is a _very_ stripped down perl interpreter ;)
		588	*/
		589	dTHX;
		590
803	UNLOCK;	591	UNLOCK;
804	}
805		592
806	#define SV_CORO(sv,func) \	593	PL_top_env = &PL_start_env;
807	do { \
808	if (SvROK (sv)) \
809	sv = SvRV (sv); \
810	\
811	if (SvTYPE (sv) == SVt_PVHV) \
812	{ \
813	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
814	\
815	if (!he) \
816	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
817	\
818	(sv) = SvRV (HeVAL(he)); \
819	} \
820	\
821	/* must also be changed inside Coro::Cont::yield */ \
822	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
823	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
824	\
825	} while(0)
826		594
827	#define SvSTATE(sv) (struct coro *)SvIV (sv)	595	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
		596	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
828		597
		598	/* continue at cctx_init, without entersub */
		599	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
		600
		601	/* somebody will hit me for both perl_run and PL_restart_op */
		602	perl_run (aTHX_ PERL_GET_CONTEXT);
		603
		604	abort ();
		605	}
		606
		607	static coro_stack *
		608	stack_new ()
		609	{
		610	coro_stack *stack;
		611
		612	New (0, stack, 1, coro_stack);
		613
		614	#if HAVE_MMAP
		615
		616	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
		617	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		618
		619	if (stack->sptr == (void *)-1)
		620	{
		621	perror ("FATAL: unable to mmap stack for coroutine");
		622	_exit (EXIT_FAILURE);
		623	}
		624
		625	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		626
		627	#else
		628
		629	stack->ssize = STACKSIZE * (long)sizeof (long);
		630	New (0, stack->sptr, STACKSIZE, long);
		631
		632	if (!stack->sptr)
		633	{
		634	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		635	_exit (EXIT_FAILURE);
		636	}
		637
		638	#endif
		639
		640	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		641
		642	return stack;
		643	}
		644
		645	static void
		646	stack_free (coro_stack *stack)
		647	{
		648	if (!stack || stack == main_stack)
		649	return;
		650
		651	#if HAVE_MMAP
		652	munmap (stack->sptr, stack->ssize);
		653	#else
		654	Safefree (stack->sptr);
		655	#endif
		656
		657	Safefree (stack);
		658	}
		659
		660	static coro_stack *stack_first;
		661
		662	static coro_stack *
		663	stack_get ()
		664	{
		665	coro_stack *stack;
		666
		667	if (stack_first)
		668	{
		669	stack = stack_first;
		670	stack_first = stack->next;
		671	}
		672	else
		673	{
		674	stack = stack_new ();
		675	PL_op = PL_op->op_next;
		676	}
		677
		678	return stack;
		679	}
		680
		681	static void
		682	stack_put (coro_stack *stack)
		683	{
		684	stack->next = stack_first;
		685	stack_first = stack;
		686	}
		687
		688	/* never call directly, always through the coro_state_transfer global variable */
		689	static void
		690	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
		691	{
		692	dSTACKLEVEL;
		693
		694	/* sometimes transfer is only called to set idle_sp */
		695	if (flags == TRANSFER_SET_STACKLEVEL)
		696	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		697	else if (prev != next)
		698	{
		699	coro_stack *prev__stack;
		700
		701	LOCK;
		702
		703	if (next->mainstack)
		704	{
		705	/* coroutine already started */
		706	SAVE (prev, flags);
		707	LOAD (next);
		708	}
		709	else
		710	{
		711	/* need to start coroutine */
		712	/* first get rid of the old state */
		713	SAVE (prev, -1);
		714	/* setup coroutine call */
		715	setup_coro (next);
		716	/* need a stack */
		717	next->stack = 0;
		718	}
		719
		720	prev__stack = prev->stack;
		721
		722	/* possibly "free" the stack */
		723	if (prev__stack->idle_sp == STACKLEVEL)
		724	{
		725	stack_put (prev__stack);
		726	prev->stack = 0;
		727	}
		728
		729	if (!next->stack)
		730	next->stack = stack_get ();
		731
		732	if (prev__stack != next->stack)
		733	{
		734	prev__stack->top_env = PL_top_env;
		735	PL_top_env = next->stack->top_env;
		736	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		737	}
		738
		739	free_coro_mortal ();
		740
		741	UNLOCK;
		742	}
		743	}
		744
		745	/* use this function pointer to call the above function */
		746	/* this is done to increase chances of the compiler not inlining the call */
		747	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
		748	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
		749
		750	struct transfer_args
		751	{
		752	struct coro *prev, *next;
		753	int flags;
		754	};
		755
		756	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
		757
		758	static void
		759	coro_state_destroy (struct coro *coro)
		760	{
		761	if (coro->refcnt--)
		762	return;
		763
		764	if (coro->mainstack && coro->mainstack != main_mainstack)
		765	{
		766	struct coro temp;
		767
		768	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
		769	LOAD (aTHX_ coro);
		770
		771	destroy_stacks (aTHX);
		772
		773	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		774
		775	coro->mainstack = 0;
		776	}
		777
		778	stack_free (coro->stack);
		779	SvREFCNT_dec (coro->args);
		780	Safefree (coro);
		781	}
		782
829	static void	783	static int
		784	coro_state_clear (SV *sv, MAGIC *mg)
		785	{
		786	struct coro *coro = (struct coro *)mg->mg_ptr;
		787	mg->mg_ptr = 0;
		788
		789	coro_state_destroy (coro);
		790
		791	return 0;
		792	}
		793
		794	static int
		795	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)
		796	{
		797	struct coro *coro = (struct coro *)mg->mg_ptr;
		798
		799	++coro->refcnt;
		800
		801	return 0;
		802	}
		803
		804	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
		805
		806	static struct coro *
		807	SvSTATE (SV *coro)
		808	{
		809	HV *stash;
		810	MAGIC *mg;
		811
		812	if (SvROK (coro))
		813	coro = SvRV (coro);
		814
		815	stash = SvSTASH (coro);
		816	if (stash != coro_stash && stash != coro_state_stash)
		817	{
		818	/* very slow, but rare, check */
		819	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		820	croak ("Coro::State object required");
		821	}
		822
		823	mg = SvMAGIC (coro);
		824	assert (mg->mg_type == PERL_MAGIC_ext);
		825	return (struct coro *)mg->mg_ptr;
		826	}
		827
		828	static void
		829	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)
		830	{
		831	ta->prev = SvSTATE (prev);
		832	ta->next = SvSTATE (next);
		833	ta->flags = flags;
		834	}
		835
		836	static void
830	api_transfer(pTHX_ SV *prev, SV *next, int flags)	837	api_transfer (SV *prev, SV *next, int flags)
831	{	838	{
832	SV_CORO (prev, "Coro::transfer");	839	dTHX;
833	SV_CORO (next, "Coro::transfer");	840	struct transfer_args ta;
834		841
835	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	842	prepare_transfer (aTHX_ &ta, prev, next, flags);
		843	TRANSFER (ta);
836	}	844	}
837		845
838	/** Coro ********************************************************************/	846	/** Coro ********************************************************************/
839		847
840	#define PRIO_MAX 3	848	#define PRIO_MAX 3
…		…
844	#define PRIO_IDLE -3	852	#define PRIO_IDLE -3
845	#define PRIO_MIN -4	853	#define PRIO_MIN -4
846		854
847	/* for Coro.pm */	855	/* for Coro.pm */
848	static GV *coro_current, *coro_idle;	856	static GV *coro_current, *coro_idle;
849	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	857	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
850	static int coro_nready;	858	static int coro_nready;
851		859
852	static void	860	static void
853	coro_enq (pTHX_ SV *sv)	861	coro_enq (pTHX_ SV *sv)
854	{	862	{
		863	int prio;
		864
855	if (SvTYPE (sv) == SVt_PVHV)	865	if (SvTYPE (sv) != SVt_PVHV)
856	{
857	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
858	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
859
860	prio = prio > PRIO_MAX ? PRIO_MAX
861	: prio < PRIO_MIN ? PRIO_MIN
862	: prio;
863
864	av_push (coro_ready [prio - PRIO_MIN], sv);
865	coro_nready++;
866
867	return;
868	}
869
870	croak ("Coro::ready tried to enqueue something that is not a coroutine");	866	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		867
		868	prio = SvSTATE (sv)->prio;
		869
		870	av_push (coro_ready [prio - PRIO_MIN], sv);
		871	coro_nready++;
871	}	872	}
872		873
873	static SV *	874	static SV *
874	coro_deq (pTHX_ int min_prio)	875	coro_deq (pTHX_ int min_prio)
875	{	876	{
…		…
878	min_prio -= PRIO_MIN;	879	min_prio -= PRIO_MIN;
879	if (min_prio < 0)	880	if (min_prio < 0)
880	min_prio = 0;	881	min_prio = 0;
881		882
882	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	883	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
883	if (av_len (coro_ready[prio]) >= 0)	884	if (AvFILLp (coro_ready [prio]) >= 0)
884	{	885	{
885	coro_nready--;	886	coro_nready--;
886	return av_shift (coro_ready[prio]);	887	return av_shift (coro_ready [prio]);
887	}	888	}
888		889
889	return 0;	890	return 0;
890	}	891	}
891		892
…		…
901	coro_enq (aTHX_ SvREFCNT_inc (coro));	902	coro_enq (aTHX_ SvREFCNT_inc (coro));
902	UNLOCK;	903	UNLOCK;
903	}	904	}
904		905
905	static void	906	static void
906	api_schedule (void)	907	prepare_schedule (aTHX_ struct transfer_args *ta)
907	{	908	{
908	dTHX;
909
910	SV *prev, *next;	909	SV *current, *prev, *next;
911		910
912	LOCK;	911	LOCK;
913		912
914	prev = SvRV (GvSV (coro_current));	913	current = GvSV (coro_current);
		914
		915	for (;;)
		916	{
		917	LOCK;
		918
915	next = coro_deq (aTHX_ PRIO_MIN);	919	next = coro_deq (aTHX_ PRIO_MIN);
916		920
917	if (!next)	921	if (next)
918	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));	922	break;
		923
		924	UNLOCK;
		925
		926	{
		927	dSP;
		928
		929	ENTER;
		930	SAVETMPS;
		931
		932	PUSHMARK (SP);
		933	PUTBACK;
		934	call_sv (GvSV (coro_idle), G_DISCARD);
		935
		936	FREETMPS;
		937	LEAVE;
		938	}
		939	}
		940
		941	prev = SvRV (current);
		942	SvRV (current) = next;
919		943
920	/* free this only after the transfer */	944	/* free this only after the transfer */
		945	free_coro_mortal ();
921	coro_mortal = prev;	946	coro_mortal = prev;
922	SV_CORO (prev, "Coro::schedule");
923		947
924	SvRV (GvSV (coro_current)) = next;	948	ta->prev = SvSTATE (prev);
925		949	ta->next = SvSTATE (next);
926	SV_CORO (next, "Coro::schedule");	950	ta->flags = TRANSFER_SAVE_ALL;
927		951
928	UNLOCK;	952	UNLOCK;
929
930	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
931	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
932	}	953	}
933		954
934	static void	955	static void
935	api_cede (void)	956	prepare_cede (aTHX_ struct transfer_args *ta)
936	{	957	{
937	dTHX;
938
939	LOCK;	958	LOCK;
940	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	959	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
941	UNLOCK;	960	UNLOCK;
942		961
		962	prepare_schedule (ta);
		963	}
		964
		965	static void
943	api_schedule ();	966	api_schedule (void)
		967	{
		968	dTHX;
		969	struct transfer_args ta;
		970
		971	prepare_schedule (&ta);
		972	TRANSFER (ta);
		973	}
		974
		975	static void
		976	api_cede (void)
		977	{
		978	dTHX;
		979	struct transfer_args ta;
		980
		981	prepare_cede (&ta);
		982	TRANSFER (ta);
944	}	983	}
945		984
946	MODULE = Coro::State PACKAGE = Coro::State	985	MODULE = Coro::State PACKAGE = Coro::State
947		986
948	PROTOTYPES: ENABLE	987	PROTOTYPES: DISABLE
949		988
950	BOOT:	989	BOOT:
951	{ /* {} necessary for stoopid perl-5.6.x */	990	{
952	#ifdef USE_ITHREADS	991	#ifdef USE_ITHREADS
953	MUTEX_INIT (&coro_mutex);	992	MUTEX_INIT (&coro_mutex);
954	#endif	993	#endif
		994	BOOT_PAGESIZE;
955		995
956	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
957	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
958	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	996	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
959		997
960	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	998	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
961	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	999	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
962	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1000	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
963	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
964		1001
965	main_mainstack = PL_mainstack;	1002	main_mainstack = PL_mainstack;
966		1003
967	coroapi.ver = CORO_API_VERSION;	1004	coroapi.ver = CORO_API_VERSION;
968	coroapi.transfer = api_transfer;	1005	coroapi.transfer = api_transfer;
969	}
970		1006
971	Coro::State	1007	Newz (0, main_stack, 1, coro_stack);
972	_newprocess(args)	1008	main_stack->idle_sp = (void *)-1;
973	SV * args	1009
974	PROTOTYPE: $	1010	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1011	}
		1012
		1013	SV *
		1014	new (char *klass, ...)
975	CODE:	1015	CODE:
976	Coro__State coro;	1016	{
		1017	struct coro *coro;
		1018	HV *hv;
		1019	int i;
977		1020
978	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
979	croak ("Coro::State::_newprocess expects an arrayref");
980
981	Newz (0, coro, 1, struct coro);	1021	Newz (0, coro, 1, struct coro);
		1022	coro->args = newAV ();
982		1023
983	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1024	hv = newHV ();
		1025	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1026	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1027
		1028	for (i = 1; i < items; i++)
		1029	av_push (coro->args, newSVsv (ST (i)));
		1030
		1031	coro->stack = main_stack;
984	coro->mainstack = 0; /* actual work is done inside transfer */	1032	/*coro->mainstack = 0; *//*actual work is done inside transfer */
985	coro->stack = 0;	1033	/*coro->stack = 0;*/
986		1034	}
987	/* same as JMPENV_BOOTSTRAP */
988	/* we might be able to recycle start_env, but safe is safe */
989	//Zero(&coro->start_env, 1, JMPENV);
990	coro->start_env.je_ret = -1;
991	coro->start_env.je_mustcatch = TRUE;
992
993	RETVAL = coro;
994	OUTPUT:	1035	OUTPUT:
995	RETVAL	1036	RETVAL
996		1037
997	void	1038	void
998	transfer(prev, next, flags)	1039	transfer (...)
999	SV *prev	1040	ALIAS:
1000	SV *next	1041	Coro::schedule = 1
1001	int flags	1042	Coro::cede = 2
1002	PROTOTYPE: @	1043	_set_stacklevel = 3
1003	CODE:	1044	CODE:
1004	PUTBACK;	1045	{
1005	SV_CORO (next, "Coro::transfer");	1046	struct transfer_args ta;
1006	SV_CORO (prev, "Coro::transfer");	1047
1007	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1048	switch (ix)
1008	SPAGAIN;	1049	{
		1050	case 0:
		1051	if (items != 3)
		1052	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1053
		1054	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1055	break;
		1056
		1057	case 1:
		1058	prepare_schedule (&ta);
		1059	break;
		1060
		1061	case 2:
		1062	prepare_cede (&ta);
		1063	break;
		1064
		1065	case 3:
		1066	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
		1067	ta.next = 0;
		1068	ta.flags = TRANSFER_SET_STACKLEVEL;
		1069	break;
		1070	}
		1071
		1072	TRANSFER (ta);
		1073	}
1009		1074
1010	void	1075	void
1011	DESTROY(coro)	1076	_clone_state_from (SV *dst, SV *src)
1012	Coro::State coro	1077	CODE:
1013	CODE:	1078	{
		1079	struct coro *coro_src = SvSTATE (src);
1014		1080
1015	if (coro->mainstack && coro->mainstack != main_mainstack)	1081	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1016	{
1017	struct coro temp;
1018		1082
1019	PUTBACK;	1083	++coro_src->refcnt;
1020	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1084	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1021	LOAD(aTHX_ coro);	1085	}
1022	SPAGAIN;
1023
1024	destroy_stacks (aTHX);
1025
1026	LOAD((&temp)); /* this will get rid of defsv etc.. */
1027	SPAGAIN;
1028
1029	coro->mainstack = 0;
1030	}
1031
1032	deallocate_stack (coro);
1033	SvREFCNT_dec (coro->args);
1034	Safefree (coro);
1035		1086
1036	void	1087	void
		1088	_nonlocal_goto (IV nextop)
		1089	CODE:
		1090	/* uuh, somebody will kill me again for this */
		1091	PL_op->op_next = INT2PTR (OP *, nextop);
		1092
		1093	void
1037	_exit(code)	1094	_exit (code)
1038	int code	1095	int code
1039	PROTOTYPE: $	1096	PROTOTYPE: $
1040	CODE:	1097	CODE:
1041	_exit (code);	1098	_exit (code);
1042		1099
1043	MODULE = Coro::State PACKAGE = Coro::Cont	1100	MODULE = Coro::State PACKAGE = Coro::Cont
1044		1101
1045	# this is slightly dirty (should expose a c-level api)
1046
1047	void	1102	void
1048	yield(...)	1103	yield (...)
1049	PROTOTYPE: @	1104	PROTOTYPE: @
1050	CODE:	1105	CODE:
1051	static SV *returnstk;	1106	{
		1107	SV *yieldstack;
1052	SV *sv;	1108	SV *sv;
1053	AV *defav = GvAV (PL_defgv);	1109	AV *defav = GvAV (PL_defgv);
1054	struct coro *prev, *next;	1110	struct coro *prev, *next;
1055		1111
1056	if (!returnstk)	1112	yieldstack = *hv_fetch (
1057	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));	1113	(HV *)SvRV (GvSV (coro_current)),
		1114	"yieldstack", sizeof ("yieldstack") - 1,
		1115	0
		1116	);
1058		1117
1059	/* set up @_ -- ugly */	1118	/* set up @_ -- ugly */
1060	av_clear (defav);	1119	av_clear (defav);
1061	av_fill (defav, items - 1);	1120	av_fill (defav, items - 1);
1062	while (items--)	1121	while (items--)
1063	av_store (defav, items, SvREFCNT_inc (ST(items)));	1122	av_store (defav, items, SvREFCNT_inc (ST(items)));
1064		1123
1065	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1066	sv = av_pop ((AV *)SvRV (returnstk));	1124	sv = av_pop ((AV *)SvRV (yieldstack));
1067	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));	1125	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1068	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));	1126	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1069	SvREFCNT_dec (sv);	1127	SvREFCNT_dec (sv);
1070		1128
1071	transfer(aTHX_ prev, next, 0);	1129	coro_state_transfer (aTHX_ prev, next, 0);
		1130	}
1072		1131
1073	MODULE = Coro::State PACKAGE = Coro	1132	MODULE = Coro::State PACKAGE = Coro
1074		1133
1075	# this is slightly dirty (should expose a c-level api)
1076
1077	BOOT:	1134	BOOT:
1078	{	1135	{
1079	int i;	1136	int i;
		1137
1080	HV *stash = gv_stashpv ("Coro", TRUE);	1138	coro_stash = gv_stashpv ("Coro", TRUE);
1081		1139
1082	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1140	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1083	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1141	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1084	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1142	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1085	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1143	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1086	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1144	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1087	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1145	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1088		1146
1089	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1147	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1090	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1148	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1091		1149
1092	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1150	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1100	coroapi.ready = api_ready;	1158	coroapi.ready = api_ready;
1101	coroapi.nready = &coro_nready;	1159	coroapi.nready = &coro_nready;
1102	coroapi.current = coro_current;	1160	coroapi.current = coro_current;
1103		1161
1104	GCoroAPI = &coroapi;	1162	GCoroAPI = &coroapi;
1105	sv_setiv(sv, (IV)&coroapi);	1163	sv_setiv (sv, (IV)&coroapi);
1106	SvREADONLY_on(sv);	1164	SvREADONLY_on (sv);
1107	}	1165	}
1108	}	1166	}
1109		1167
1110	#if !PERL_MICRO	1168	int
		1169	prio (Coro::State coro, int newprio = 0)
		1170	ALIAS:
		1171	nice = 1
		1172	CODE:
		1173	{
		1174	RETVAL = coro->prio;
		1175
		1176	if (items > 1)
		1177	{
		1178	if (ix)
		1179	newprio += coro->prio;
		1180
		1181	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1182	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1183
		1184	coro->prio = newprio;
		1185	}
		1186	}
1111		1187
1112	void	1188	void
1113	ready(self)	1189	ready (SV *self)
1114	SV * self
1115	PROTOTYPE: $	1190	PROTOTYPE: $
1116	CODE:	1191	CODE:
1117	api_ready (self);	1192	api_ready (self);
1118		1193
1119	#endif
1120
1121	int	1194	int
1122	nready(...)	1195	nready (...)
1123	PROTOTYPE:	1196	PROTOTYPE:
1124	CODE:	1197	CODE:
1125	RETVAL = coro_nready;	1198	RETVAL = coro_nready;
1126	OUTPUT:	1199	OUTPUT:
1127	RETVAL	1200	RETVAL
1128		1201
		1202	MODULE = Coro::State PACKAGE = Coro::AIO
		1203
		1204	SV *
		1205	_get_state ()
		1206	CODE:
		1207	{
		1208	struct {
		1209	int errorno;
		1210	int laststype;
		1211	int laststatval;
		1212	Stat_t statcache;
		1213	} data;
		1214
		1215	data.errorno = errno;
		1216	data.laststype = PL_laststype;
		1217	data.laststatval = PL_laststatval;
		1218	data.statcache = PL_statcache;
		1219
		1220	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1221	}
		1222	OUTPUT:
		1223	RETVAL
		1224
1129	void	1225	void
1130	schedule(...)	1226	_set_state (char *data_)
1131	PROTOTYPE:	1227	PROTOTYPE: $
1132	CODE:	1228	CODE:
1133	api_schedule ();	1229	{
		1230	struct {
		1231	int errorno;
		1232	int laststype;
		1233	int laststatval;
		1234	Stat_t statcache;
		1235	} *data = (void *)data_;
1134		1236
1135	void	1237	errno = data->errorno;
1136	cede(...)	1238	PL_laststype = data->laststype;
1137	PROTOTYPE:	1239	PL_laststatval = data->laststatval;
1138	CODE:	1240	PL_statcache = data->statcache;
1139	api_cede ();	1241	}
1140

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