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Comparing Coro/Coro/State.xs (file contents):
Revision 1.103 by root, Mon Nov 27 01:33:30 2006 UTC vs.
Revision 1.146 by root, Sat Mar 17 19:51:57 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
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"
		10
		11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
8		47
9	#define PERL_VERSION_ATLEAST(a,b,c) \	48	#define PERL_VERSION_ATLEAST(a,b,c) \
10	(PERL_REVISION > (a) \	49	(PERL_REVISION > (a) \
11	|| (PERL_REVISION == (a) \	50	|| (PERL_REVISION == (a) \
12	&& (PERL_VERSION > (b) \	51	&& (PERL_VERSION > (b) \
…		…
31	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
32	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
33	# endif	72	# endif
34	#endif	73	#endif
35		74
36	#include <stdio.h>	75	/* 5.8.7 */
37	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
38		79
39	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40	# undef STACKGUARD	81	# undef CORO_STACKGUARD
41	#endif
42
43	#ifndef STACKGUARD
44	# define STACKGUARD 0
45	#endif
46
47	#ifdef HAVE_MMAP
48	# include <unistd.h>
49	# include <sys/mman.h>
50	# ifndef MAP_ANONYMOUS
51	# ifdef MAP_ANON
52	# define MAP_ANONYMOUS MAP_ANON
53	# else
54	# undef HAVE_MMAP
55	# endif
56	# endif	82	#endif
57	# include <limits.h>	83
58	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
59	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
60	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
61	static long pagesize;
62	# else
63	# define BOOT_PAGESIZE
64	# endif	86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
65	#endif	91	#endif
66		92
67	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macro should declare a variable stacklevel that contains and approximation
68	* to the current C stack pointer. Its property is that it changes with each call	94	* to the current C stack pointer. Its property is that it changes with each call
69	* and should be unique. */	95	* and should be unique. */
…		…
72		98
73	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
74		100
75	#if __GNUC__ >= 3	101	#if __GNUC__ >= 3
76	# define attribute(x) __attribute__(x)	102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
77	#else	104	#else
78	# define attribute(x)	105	# define attribute(x)
		106	# define BARRIER
79	#endif	107	#endif
80		108
81	#define NOINLINE attribute ((noinline))	109	#define NOINLINE attribute ((noinline))
82		110
83	#include "CoroAPI.h"	111	#include "CoroAPI.h"
84
85	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
86		112
87	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
88	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
89	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
90	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
91	#else	117	#else
92	# define LOCK (void)0	118	# define LOCK (void)0
93	# define UNLOCK (void)0	119	# define UNLOCK (void)0
94	#endif	120	#endif
95		121
		122	/* helper storage struct for Coro::AIO */
		123	struct io_state
		124	{
		125	int errorno;
		126	I32 laststype;
		127	int laststatval;
		128	Stat_t statcache;
		129	};
		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
96	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
97	static AV *main_mainstack; /* used to differentiate between $main and others */	133	static AV *main_mainstack; /* used to differentiate between $main and others */
98	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
99	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
100		136
		137	static struct coro_cctx *cctx_first;
		138	static int cctx_count, cctx_idle;
		139
101	/* this is a structure representing a c-level coroutine */	140	/* this is a structure representing a c-level coroutine */
102	typedef struct coro_stack {	141	typedef struct coro_cctx {
103	struct coro_stack *next;	142	struct coro_cctx *next;
104		143
105	/* the stack */	144	/* the stack */
106	void *sptr;	145	void *sptr;
107	long ssize; /* positive == mmap, otherwise malloc */	146	size_t ssize;
108		147
109	/* cpu state */	148	/* cpu state */
110	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	149	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		150	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
111	JMPENV *top_env;	151	JMPENV *top_env;
112	coro_context cctx;	152	coro_context cctx;
113	} coro_stack;	153
		154	#if CORO_USE_VALGRIND
		155	int valgrind_id;
		156	#endif
		157	char inuse, mapped;
		158	} coro_cctx;
		159
		160	enum {
		161	CF_RUNNING = 0x0001, /* coroutine is running */
		162	CF_READY = 0x0002, /* coroutine is ready */
		163	CF_NEW = 0x0004, /* has never been switched to */
		164	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		165	};
114		166
115	/* this is a structure representing a perl-level coroutine */	167	/* this is a structure representing a perl-level coroutine */
116	struct coro {	168	struct coro {
117	/* the c coroutine allocated to this perl coroutine, if any */	169	/* the c coroutine allocated to this perl coroutine, if any */
118	coro_stack *stack;	170	coro_cctx *cctx;
119		171
120	/* data associated with this coroutine (initial args) */	172	/* data associated with this coroutine (initial args) */
121	AV *args;	173	AV *args;
122	int refcnt;	174	int refcnt;
		175	int save; /* CORO_SAVE flags */
		176	int flags; /* CF_ flags */
123		177
124	/* optionally saved, might be zero */	178	/* optionally saved, might be zero */
125	AV *defav;	179	AV *defav; /* @_ */
126	SV *defsv;	180	SV *defsv; /* $_ */
127	SV *errsv;	181	SV *errsv; /* $@ */
		182	SV *irssv; /* $/ */
		183	SV *irssv_sv; /* real $/ cache */
128		184
129	/* saved global state not related to stacks */	185	#define VAR(name,type) type name;
130	U8 dowarn;	186	# include "state.h"
131	I32 in_eval;	187	#undef VAR
132
133	/* the stacks and related info (callchain etc..) */
134	PERL_SI *curstackinfo;
135	AV *curstack;
136	AV *mainstack;
137	SV **stack_sp;
138	OP *op;
139	SV **curpad;
140	AV *comppad;
141	CV *compcv;
142	SV **stack_base;
143	SV **stack_max;
144	SV **tmps_stack;
145	I32 tmps_floor;
146	I32 tmps_ix;
147	I32 tmps_max;
148	I32 *markstack;
149	I32 *markstack_ptr;
150	I32 *markstack_max;
151	I32 *scopestack;
152	I32 scopestack_ix;
153	I32 scopestack_max;
154	ANY *savestack;
155	I32 savestack_ix;
156	I32 savestack_max;
157	OP **retstack;
158	I32 retstack_ix;
159	I32 retstack_max;
160	PMOP *curpm;
161	COP *curcop;
162		188
163	/* coro process data */	189	/* coro process data */
164	int prio;	190	int prio;
165	};	191	};
166		192
167	typedef struct coro *Coro__State;	193	typedef struct coro *Coro__State;
168	typedef struct coro *Coro__State_or_hashref;	194	typedef struct coro *Coro__State_or_hashref;
169		195
		196	/** Coro ********************************************************************/
		197
		198	#define PRIO_MAX 3
		199	#define PRIO_HIGH 1
		200	#define PRIO_NORMAL 0
		201	#define PRIO_LOW -1
		202	#define PRIO_IDLE -3
		203	#define PRIO_MIN -4
		204
		205	/* for Coro.pm */
		206	static SV *coro_current;
		207	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		208	static int coro_nready;
		209
		210	/** lowlevel stuff **********************************************************/
		211
170	static AV *	212	static AV *
171	coro_clone_padlist (CV *cv)	213	coro_clone_padlist (pTHX_ CV *cv)
172	{	214	{
173	AV *padlist = CvPADLIST (cv);	215	AV *padlist = CvPADLIST (cv);
174	AV *newpadlist, *newpad;	216	AV *newpadlist, *newpad;
175		217
176	newpadlist = newAV ();	218	newpadlist = newAV ();
…		…
188		230
189	return newpadlist;	231	return newpadlist;
190	}	232	}
191		233
192	static void	234	static void
193	free_padlist (AV *padlist)	235	free_padlist (pTHX_ AV *padlist)
194	{	236	{
195	/* may be during global destruction */	237	/* may be during global destruction */
196	if (SvREFCNT (padlist))	238	if (SvREFCNT (padlist))
197	{	239	{
198	I32 i = AvFILLp (padlist);	240	I32 i = AvFILLp (padlist);
…		…
219	AV *padlist;	261	AV *padlist;
220	AV *av = (AV *)mg->mg_obj;	262	AV *av = (AV *)mg->mg_obj;
221		263
222	/* casting is fun. */	264	/* casting is fun. */
223	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	265	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
224	free_padlist (padlist);	266	free_padlist (aTHX_ padlist);
225		267
226	SvREFCNT_dec (av);	268	SvREFCNT_dec (av);
227		269
228	return 0;	270	return 0;
229	}	271	}
230		272
231	#define PERL_MAGIC_coro PERL_MAGIC_ext	273	#define PERL_MAGIC_coro PERL_MAGIC_ext
232		274
233	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	275	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
234		276
		277	#define CORO_MAGIC(cv) \
		278	SvMAGIC (cv) \
		279	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		280	? SvMAGIC (cv) \
		281	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		282	: 0
		283
235	/* the next two functions merely cache the padlists */	284	/* the next two functions merely cache the padlists */
236	static void	285	static void
237	get_padlist (CV *cv)	286	get_padlist (pTHX_ CV *cv)
238	{	287	{
239	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	288	MAGIC *mg = CORO_MAGIC (cv);
		289	AV *av;
240		290
241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	291	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	292	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	293	else
244	{	294	{
245	#if 0	295	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	296	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	297	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	298	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	299	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	300	SvREFCNT_dec (cp);
251	#else	301	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	302	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	303	#endif
254	}	304	}
255	}	305	}
256		306
257	static void	307	static void
258	put_padlist (CV *cv)	308	put_padlist (pTHX_ CV *cv)
259	{	309	{
260	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	310	MAGIC *mg = CORO_MAGIC (cv);
		311	AV *av;
261		312
262	if (!mg)	313	if (!mg)
263	{	314	{
264	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	315	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	316	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266	mg->mg_virtual = &vtbl_coro;	317	mg->mg_virtual = &vtbl_coro;
267	mg->mg_obj = (SV *)newAV ();	318	mg->mg_obj = (SV *)newAV ();
268	}	319	}
269		320
270	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	321	av = (AV *)mg->mg_obj;
		322
		323	if (AvFILLp (av) >= AvMAX (av))
		324	av_extend (av, AvMAX (av) + 1);
		325
		326	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
271	}	327	}
		328
		329	/** load & save, init *******************************************************/
272		330
273	#define SB do {	331	#define SB do {
274	#define SE } while (0)	332	#define SE } while (0)
275		333
276	#define LOAD(state) load_state((state));
277	#define SAVE(state,flags) save_state((state),(flags));
278
279	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	334	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
280		335
281	static void	336	static void
282	load_state(Coro__State c)	337	load_perl (pTHX_ Coro__State c)
283	{	338	{
284	PL_dowarn = c->dowarn;	339	#define VAR(name,type) PL_ ## name = c->name;
285	PL_in_eval = c->in_eval;	340	# include "state.h"
286		341	#undef VAR
287	PL_curstackinfo = c->curstackinfo;
288	PL_curstack = c->curstack;
289	PL_mainstack = c->mainstack;
290	PL_stack_sp = c->stack_sp;
291	PL_op = c->op;
292	PL_curpad = c->curpad;
293	PL_comppad = c->comppad;
294	PL_compcv = c->compcv;
295	PL_stack_base = c->stack_base;
296	PL_stack_max = c->stack_max;
297	PL_tmps_stack = c->tmps_stack;
298	PL_tmps_floor = c->tmps_floor;
299	PL_tmps_ix = c->tmps_ix;
300	PL_tmps_max = c->tmps_max;
301	PL_markstack = c->markstack;
302	PL_markstack_ptr = c->markstack_ptr;
303	PL_markstack_max = c->markstack_max;
304	PL_scopestack = c->scopestack;
305	PL_scopestack_ix = c->scopestack_ix;
306	PL_scopestack_max = c->scopestack_max;
307	PL_savestack = c->savestack;
308	PL_savestack_ix = c->savestack_ix;
309	PL_savestack_max = c->savestack_max;
310	#if !PERL_VERSION_ATLEAST (5,9,0)
311	PL_retstack = c->retstack;
312	PL_retstack_ix = c->retstack_ix;
313	PL_retstack_max = c->retstack_max;
314	#endif
315	PL_curpm = c->curpm;
316	PL_curcop = c->curcop;
317		342
318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	343	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	344	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	345	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		346	if (c->irssv)
		347	{
		348	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		349	SvREFCNT_dec (c->irssv);
		350	else
		351	{
		352	REPLACE_SV (PL_rs, c->irssv);
		353	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		354	sv_setsv (c->irssv_sv, PL_rs);
		355	}
		356	}
321		357
322	{	358	{
323	dSP;	359	dSP;
324	CV *cv;	360	CV *cv;
325		361
326	/* now do the ugly restore mess */	362	/* now do the ugly restore mess */
327	while ((cv = (CV *)POPs))	363	while ((cv = (CV *)POPs))
328	{	364	{
329	AV *padlist = (AV *)POPs;
330
331	if (padlist)
332	{
333	put_padlist (cv); /* mark this padlist as available */	365	put_padlist (aTHX_ cv); /* mark this padlist as available */
334	CvPADLIST(cv) = padlist;	366	CvDEPTH (cv) = PTR2IV (POPs);
335	}	367	CvPADLIST (cv) = (AV *)POPs;
336
337	++CvDEPTH(cv);
338	}	368	}
339		369
340	PUTBACK;	370	PUTBACK;
341	}	371	}
		372	assert (!PL_comppad || AvARRAY (PL_comppad));//D
342	}	373	}
343		374
344	static void	375	static void
345	save_state(Coro__State c, int flags)	376	save_perl (pTHX_ Coro__State c)
346	{	377	{
		378	assert (!PL_comppad || AvARRAY (PL_comppad));//D
347	{	379	{
348	dSP;	380	dSP;
349	I32 cxix = cxstack_ix;	381	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	382	PERL_CONTEXT *ccstk = cxstack;
351	PERL_SI *top_si = PL_curstackinfo;	383	PERL_SI *top_si = PL_curstackinfo;
…		…
353	/*	385	/*
354	* the worst thing you can imagine happens first - we have to save	386	* the worst thing you can imagine happens first - we have to save
355	* (and reinitialize) all cv's in the whole callchain :(	387	* (and reinitialize) all cv's in the whole callchain :(
356	*/	388	*/
357		389
		390	EXTEND (SP, 3 + 1);
358	PUSHs (Nullsv);	391	PUSHs (Nullsv);
359	/* this loop was inspired by pp_caller */	392	/* this loop was inspired by pp_caller */
360	for (;;)	393	for (;;)
361	{	394	{
362	while (cxix >= 0)	395	while (cxix >= 0)
363	{	396	{
364	PERL_CONTEXT *cx = &ccstk[cxix--];	397	PERL_CONTEXT *cx = &ccstk[cxix--];
365		398
366	if (CxTYPE(cx) == CXt_SUB)	399	if (CxTYPE (cx) == CXt_SUB)
367	{	400	{
368	CV *cv = cx->blk_sub.cv;	401	CV *cv = cx->blk_sub.cv;
		402
369	if (CvDEPTH(cv))	403	if (CvDEPTH (cv))
370	{	404	{
371	EXTEND (SP, CvDEPTH(cv)*2);	405	EXTEND (SP, 3);
372
373	while (--CvDEPTH(cv))
374	{
375	/* this tells the restore code to increment CvDEPTH */
376	PUSHs (Nullsv);
377	PUSHs ((SV *)cv);
378	}
379
380	PUSHs ((SV *)CvPADLIST(cv));	406	PUSHs ((SV *)CvPADLIST (cv));
		407	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
381	PUSHs ((SV *)cv);	408	PUSHs ((SV *)cv);
382		409
		410	CvDEPTH (cv) = 0;
383	get_padlist (cv);	411	get_padlist (aTHX_ cv);
384	}	412	}
385	}	413	}
386	#ifdef CXt_FORMAT
387	else if (CxTYPE(cx) == CXt_FORMAT)
388	{
389	/* I never used formats, so how should I know how these are implemented? */
390	/* my bold guess is as a simple, plain sub... */
391	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
392	}
393	#endif
394	}	414	}
395		415
396	if (top_si->si_type == PERLSI_MAIN)	416	if (top_si->si_type == PERLSI_MAIN)
397	break;	417	break;
398		418
…		…
402	}	422	}
403		423
404	PUTBACK;	424	PUTBACK;
405	}	425	}
406		426
407	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	427	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
408	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	428	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
409	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	429	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		430	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
410		431
411	c->dowarn = PL_dowarn;	432	#define VAR(name,type)c->name = PL_ ## name;
412	c->in_eval = PL_in_eval;	433	# include "state.h"
413		434	#undef VAR
414	c->curstackinfo = PL_curstackinfo;
415	c->curstack = PL_curstack;
416	c->mainstack = PL_mainstack;
417	c->stack_sp = PL_stack_sp;
418	c->op = PL_op;
419	c->curpad = PL_curpad;
420	c->comppad = PL_comppad;
421	c->compcv = PL_compcv;
422	c->stack_base = PL_stack_base;
423	c->stack_max = PL_stack_max;
424	c->tmps_stack = PL_tmps_stack;
425	c->tmps_floor = PL_tmps_floor;
426	c->tmps_ix = PL_tmps_ix;
427	c->tmps_max = PL_tmps_max;
428	c->markstack = PL_markstack;
429	c->markstack_ptr = PL_markstack_ptr;
430	c->markstack_max = PL_markstack_max;
431	c->scopestack = PL_scopestack;
432	c->scopestack_ix = PL_scopestack_ix;
433	c->scopestack_max = PL_scopestack_max;
434	c->savestack = PL_savestack;
435	c->savestack_ix = PL_savestack_ix;
436	c->savestack_max = PL_savestack_max;
437	#if !PERL_VERSION_ATLEAST (5,9,0)
438	c->retstack = PL_retstack;
439	c->retstack_ix = PL_retstack_ix;
440	c->retstack_max = PL_retstack_max;
441	#endif
442	c->curpm = PL_curpm;
443	c->curcop = PL_curcop;
444	}	435	}
445		436
446	/*	437	/*
447	* allocate various perl stacks. This is an exact copy	438	* allocate various perl stacks. This is an exact copy
448	* of perl.c:init_stacks, except that it uses less memory	439	* of perl.c:init_stacks, except that it uses less memory
449	* on the (sometimes correct) assumption that coroutines do	440	* on the (sometimes correct) assumption that coroutines do
450	* not usually need a lot of stackspace.	441	* not usually need a lot of stackspace.
451	*/	442	*/
		443	#if CORO_PREFER_PERL_FUNCTIONS
		444	# define coro_init_stacks init_stacks
		445	#else
452	static void	446	static void
453	coro_init_stacks ()	447	coro_init_stacks (pTHX)
454	{	448	{
455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	449	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
456	PL_curstackinfo->si_type = PERLSI_MAIN;	450	PL_curstackinfo->si_type = PERLSI_MAIN;
457	PL_curstack = PL_curstackinfo->si_stack;	451	PL_curstack = PL_curstackinfo->si_stack;
458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459		453
460	PL_stack_base = AvARRAY(PL_curstack);	454	PL_stack_base = AvARRAY(PL_curstack);
461	PL_stack_sp = PL_stack_base;	455	PL_stack_sp = PL_stack_base;
462	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463		457
464	New(50,PL_tmps_stack,96,SV*);	458	New(50,PL_tmps_stack,128,SV*);
465	PL_tmps_floor = -1;	459	PL_tmps_floor = -1;
466	PL_tmps_ix = -1;	460	PL_tmps_ix = -1;
467	PL_tmps_max = 96;	461	PL_tmps_max = 128;
468		462
469	New(54,PL_markstack,16,I32);	463	New(54,PL_markstack,32,I32);
470	PL_markstack_ptr = PL_markstack;	464	PL_markstack_ptr = PL_markstack;
471	PL_markstack_max = PL_markstack + 16;	465	PL_markstack_max = PL_markstack + 32;
472		466
473	#ifdef SET_MARK_OFFSET	467	#ifdef SET_MARK_OFFSET
474	SET_MARK_OFFSET;	468	SET_MARK_OFFSET;
475	#endif	469	#endif
476		470
477	New(54,PL_scopestack,16,I32);	471	New(54,PL_scopestack,32,I32);
478	PL_scopestack_ix = 0;	472	PL_scopestack_ix = 0;
479	PL_scopestack_max = 16;	473	PL_scopestack_max = 32;
480		474
481	New(54,PL_savestack,96,ANY);	475	New(54,PL_savestack,64,ANY);
482	PL_savestack_ix = 0;	476	PL_savestack_ix = 0;
483	PL_savestack_max = 96;	477	PL_savestack_max = 64;
484		478
485	#if !PERL_VERSION_ATLEAST (5,9,0)	479	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	480	New(54,PL_retstack,16,OP*);
487	PL_retstack_ix = 0;	481	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	482	PL_retstack_max = 16;
489	#endif	483	#endif
490	}	484	}
		485	#endif
491		486
492	/*	487	/*
493	* destroy the stacks, the callchain etc...	488	* destroy the stacks, the callchain etc...
494	*/	489	*/
495	static void	490	static void
496	coro_destroy_stacks()	491	coro_destroy_stacks (pTHX)
497	{	492	{
498	if (!IN_DESTRUCT)	493	if (!IN_DESTRUCT)
499	{	494	{
500	/* is this ugly, I ask? */	495	/* restore all saved variables and stuff */
501	LEAVE_SCOPE (0);	496	LEAVE_SCOPE (0);
		497	assert (PL_tmps_floor == -1);
502		498
503	/* sure it is, but more important: is it correct?? :/ */	499	/* free all temporaries */
504	FREETMPS;	500	FREETMPS;
		501	assert (PL_tmps_ix == -1);
505		502
		503	/* unwind all extra stacks */
506	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	504	POPSTACK_TO (PL_mainstack);
		505
		506	/* unwind main stack */
		507	dounwind (-1);
507	}	508	}
508		509
509	while (PL_curstackinfo->si_next)	510	while (PL_curstackinfo->si_next)
510	PL_curstackinfo = PL_curstackinfo->si_next;	511	PL_curstackinfo = PL_curstackinfo->si_next;
511		512
512	while (PL_curstackinfo)	513	while (PL_curstackinfo)
513	{	514	{
514	PERL_SI *p = PL_curstackinfo->si_prev;	515	PERL_SI *p = PL_curstackinfo->si_prev;
515		516
516	{ /*D*//*remove*/
517	dSP;
518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519	PUTBACK; /* possibly superfluous */
520	}
521
522	if (!IN_DESTRUCT)	517	if (!IN_DESTRUCT)
523	{
524	dounwind (-1);/*D*//*remove*/
525	SvREFCNT_dec (PL_curstackinfo->si_stack);	518	SvREFCNT_dec (PL_curstackinfo->si_stack);
526	}
527		519
528	Safefree (PL_curstackinfo->si_cxstack);	520	Safefree (PL_curstackinfo->si_cxstack);
529	Safefree (PL_curstackinfo);	521	Safefree (PL_curstackinfo);
530	PL_curstackinfo = p;	522	PL_curstackinfo = p;
531	}	523	}
…		…
537	#if !PERL_VERSION_ATLEAST (5,9,0)	529	#if !PERL_VERSION_ATLEAST (5,9,0)
538	Safefree (PL_retstack);	530	Safefree (PL_retstack);
539	#endif	531	#endif
540	}	532	}
541		533
		534	/** coroutine stack handling ************************************************/
		535
542	static void	536	static void
543	setup_coro (struct coro *coro)	537	setup_coro (pTHX_ struct coro *coro)
544	{	538	{
545	/*	539	/*
546	* emulate part of the perl startup here.	540	* emulate part of the perl startup here.
547	*/	541	*/
548
549	coro_init_stacks ();	542	coro_init_stacks (aTHX);
550		543
		544	PL_curcop = &PL_compiling;
		545	PL_in_eval = EVAL_NULL;
551	PL_curcop = 0;	546	PL_comppad = 0;
552	PL_in_eval = 0;
553	PL_curpm = 0;	547	PL_curpm = 0;
		548	PL_localizing = 0;
		549	PL_dirty = 0;
		550	PL_restartop = 0;
554		551
555	{	552	{
556	dSP;	553	dSP;
557	LOGOP myop;	554	LOGOP myop;
558		555
559	/* I have no idea why this is needed, but it is */
560	PUSHMARK (SP);
561
562	SvREFCNT_dec (GvAV (PL_defgv));	556	SvREFCNT_dec (GvAV (PL_defgv));
563	GvAV (PL_defgv) = coro->args; coro->args = 0;	557	GvAV (PL_defgv) = coro->args; coro->args = 0;
564		558
565	Zero (&myop, 1, LOGOP);	559	Zero (&myop, 1, LOGOP);
566	myop.op_next = Nullop;	560	myop.op_next = Nullop;
567	myop.op_flags = OPf_WANT_VOID;	561	myop.op_flags = OPf_WANT_VOID;
568		562
		563	PUSHMARK (SP);
		564	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		565	PUTBACK;
569	PL_op = (OP *)&myop;	566	PL_op = (OP *)&myop;
570
571	PUSHMARK (SP);
572	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
573	PUTBACK;
574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
575	SPAGAIN;	568	SPAGAIN;
576
577	ENTER; /* necessary e.g. for dounwind */
578	}	569	}
579	}
580		570
		571	ENTER; /* necessary e.g. for dounwind */
		572	}
		573
581	static void	574	static void
582	free_coro_mortal ()	575	free_coro_mortal (pTHX)
583	{	576	{
584	if (coro_mortal)	577	if (coro_mortal)
585	{	578	{
586	SvREFCNT_dec (coro_mortal);	579	SvREFCNT_dec (coro_mortal);
587	coro_mortal = 0;	580	coro_mortal = 0;
588	}	581	}
589	}	582	}
590		583
		584	/* inject a fake call to Coro::State::_cctx_init into the execution */
591	static void NOINLINE	585	static void NOINLINE
592	prepare_cctx (coro_stack *cctx)	586	prepare_cctx (pTHX_ coro_cctx *cctx)
593	{	587	{
594	dSP;	588	dSP;
595	LOGOP myop;	589	LOGOP myop;
596		590
597	Zero (&myop, 1, LOGOP);	591	Zero (&myop, 1, LOGOP);
598	myop.op_next = PL_op;	592	myop.op_next = PL_op;
599	myop.op_flags = OPf_WANT_VOID;	593	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
600
601	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
602		594
603	PUSHMARK (SP);	595	PUSHMARK (SP);
		596	EXTEND (SP, 2);
		597	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
604	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	598	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
605	PUTBACK;	599	PUTBACK;
		600	PL_op = (OP *)&myop;
606	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	601	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
607	SPAGAIN;	602	SPAGAIN;
608	}	603	}
609		604
610	static void	605	static void
611	coro_run (void *arg)	606	coro_run (void *arg)
612	{	607	{
		608	dTHX;
		609
613	/* coro_run is the alternative epilogue of transfer() */	610	/* coro_run is the alternative tail of transfer(), so unlock here. */
614	UNLOCK;	611	UNLOCK;
615		612
616	/*	613	/*
617	* this is a _very_ stripped down perl interpreter ;)	614	* this is a _very_ stripped down perl interpreter ;)
618	*/	615	*/
619	PL_top_env = &PL_start_env;	616	PL_top_env = &PL_start_env;
		617
620	/* inject call to cctx_init */	618	/* inject call to cctx_init */
621	prepare_cctx ((coro_stack *)arg);	619	prepare_cctx (aTHX_ (coro_cctx *)arg);
622		620
623	/* somebody will hit me for both perl_run and PL_restartop */	621	/* somebody will hit me for both perl_run and PL_restartop */
		622	PL_restartop = PL_op;
624	perl_run (PL_curinterp);	623	perl_run (PL_curinterp);
625		624
626	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);	625	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
627	abort ();	626	abort ();
628	}	627	}
629		628
630	static coro_stack *	629	static coro_cctx *
631	stack_new ()	630	cctx_new ()
632	{	631	{
633	coro_stack *stack;	632	coro_cctx *cctx;
		633	void *stack_start;
		634	size_t stack_size;
634		635
		636	++cctx_count;
		637
635	New (0, stack, 1, coro_stack);	638	Newz (0, cctx, 1, coro_cctx);
636		639
637	#if HAVE_MMAP	640	#if HAVE_MMAP
638		641
639	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	642	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
640	/* mmap suppsedly does allocate-on-write for us */	643	/* mmap supposedly does allocate-on-write for us */
641	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	644	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
642		645
643	if (stack->sptr == (void *)-1)	646	if (cctx->sptr != (void *)-1)
644	{
645	perror ("FATAL: unable to mmap stack for coroutine");
646	_exit (EXIT_FAILURE);
647	}	647	{
648
649	# if STACKGUARD	648	# if CORO_STACKGUARD
650	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	649	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
651	# endif	650	# endif
652		651	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
653	#else	652	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
654		653	cctx->mapped = 1;
655	stack->ssize = STACKSIZE * (long)sizeof (long);
656	New (0, stack->sptr, STACKSIZE, long);
657
658	if (!stack->sptr)
659	{	654	}
		655	else
		656	#endif
		657	{
		658	cctx->ssize = coro_stacksize * (long)sizeof (long);
		659	New (0, cctx->sptr, coro_stacksize, long);
		660
		661	if (!cctx->sptr)
		662	{
660	perror (stderr, "FATAL: unable to malloc stack for coroutine");	663	perror ("FATAL: unable to allocate stack for coroutine");
661	_exit (EXIT_FAILURE);	664	_exit (EXIT_FAILURE);
662	}	665	}
663		666
664	#endif	667	stack_start = cctx->sptr;
		668	stack_size = cctx->ssize;
		669	}
665		670
		671	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
666	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	672	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
667		673
668	return stack;	674	return cctx;
669	}	675	}
670		676
671	static void	677	static void
672	stack_free (coro_stack *stack)	678	cctx_destroy (coro_cctx *cctx)
673	{	679	{
674	if (!stack)	680	if (!cctx)
675	return;	681	return;
676		682
		683	--cctx_count;
		684
		685	#if CORO_USE_VALGRIND
		686	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		687	#endif
		688
677	#if HAVE_MMAP	689	#if HAVE_MMAP
		690	if (cctx->mapped)
678	munmap (stack->sptr, stack->ssize);	691	munmap (cctx->sptr, cctx->ssize);
679	#else	692	else
		693	#endif
680	Safefree (stack->sptr);	694	Safefree (cctx->sptr);
681	#endif
682		695
683	Safefree (stack);	696	Safefree (cctx);
684	}	697	}
685		698
686	static coro_stack *stack_first;
687	static int cctx_count, cctx_idle;
688
689	static coro_stack *	699	static coro_cctx *
690	stack_get ()	700	cctx_get (pTHX)
691	{	701	{
692	coro_stack *stack;	702	while (cctx_first)
693
694	if (stack_first)
695	{	703	{
		704	coro_cctx *cctx = cctx_first;
		705	cctx_first = cctx->next;
696	--cctx_idle;	706	--cctx_idle;
697	stack = stack_first;	707
698	stack_first = stack->next;	708	if (cctx->ssize >= coro_stacksize)
		709	return cctx;
		710
		711	cctx_destroy (cctx);
699	}	712	}
700	else	713
701	{
702	++cctx_count;
703	stack = stack_new ();
704	PL_op = PL_op->op_next;	714	PL_op = PL_op->op_next;
		715	return cctx_new ();
		716	}
		717
		718	static void
		719	cctx_put (coro_cctx *cctx)
		720	{
		721	/* free another cctx if overlimit */
		722	if (cctx_idle >= MAX_IDLE_CCTX)
		723	{
		724	coro_cctx *first = cctx_first;
		725	cctx_first = first->next;
		726	--cctx_idle;
		727
		728	assert (!first->inuse);
		729	cctx_destroy (first);
705	}	730	}
706		731
707	return stack;
708	}
709
710	static void
711	stack_put (coro_stack *stack)
712	{
713	++cctx_idle;	732	++cctx_idle;
714	stack->next = stack_first;	733	cctx->next = cctx_first;
715	stack_first = stack;	734	cctx_first = cctx;
716	}	735	}
		736
		737	/** coroutine switching *****************************************************/
717		738
718	/* never call directly, always through the coro_state_transfer global variable */	739	/* never call directly, always through the coro_state_transfer global variable */
719	static void NOINLINE	740	static void NOINLINE
720	transfer (struct coro *prev, struct coro *next, int flags)	741	transfer (pTHX_ struct coro *prev, struct coro *next)
721	{	742	{
722	dSTACKLEVEL;	743	dSTACKLEVEL;
723		744
724	/* sometimes transfer is only called to set idle_sp */	745	/* sometimes transfer is only called to set idle_sp */
725	if (flags == TRANSFER_SET_STACKLEVEL)	746	if (!next)
		747	{
726	((coro_stack *)prev)->idle_sp = STACKLEVEL;	748	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		749	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		750	}
727	else if (prev != next)	751	else if (prev != next)
728	{	752	{
729	coro_stack *prev__stack;	753	coro_cctx *prev__cctx;
		754
		755	if (prev->flags & CF_NEW)
		756	{
		757	/* create a new empty context */
		758	Newz (0, prev->cctx, 1, coro_cctx);
		759	prev->cctx->inuse = 1;
		760	prev->flags &= ~CF_NEW;
		761	prev->flags |= CF_RUNNING;
		762	}
		763
		764	/*TODO: must not croak here */
		765	if (!prev->flags & CF_RUNNING)
		766	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		767
		768	if (next->flags & CF_RUNNING)
		769	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		770
		771	if (next->flags & CF_DESTROYED)
		772	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		773
		774	prev->flags &= ~CF_RUNNING;
		775	next->flags |= CF_RUNNING;
730		776
731	LOCK;	777	LOCK;
732		778
733	if (next->mainstack)	779	if (next->flags & CF_NEW)
734	{	780	{
735	/* coroutine already started */	781	/* need to start coroutine */
736	SAVE (prev, flags);	782	next->flags &= ~CF_NEW;
737	LOAD (next);	783	/* first get rid of the old state */
		784	save_perl (aTHX_ prev);
		785	/* setup coroutine call */
		786	setup_coro (aTHX_ next);
		787	/* need a new stack */
		788	assert (!next->cctx);
738	}	789	}
739	else	790	else
740	{	791	{
741	/* need to start coroutine */	792	/* coroutine already started */
742	/* first get rid of the old state */	793	save_perl (aTHX_ prev);
743	SAVE (prev, -1);	794	load_perl (aTHX_ next);
744	/* setup coroutine call */
745	setup_coro (next);
746	/* need a stack */
747	next->stack = 0;
748	}	795	}
749		796
750	if (!prev->stack)
751	/* create a new empty context */
752	Newz (0, prev->stack, 1, coro_stack);
753
754	prev__stack = prev->stack;	797	prev__cctx = prev->cctx;
755		798
756	/* possibly "free" the stack */	799	/* possibly "free" the cctx */
757	if (prev__stack->idle_sp == STACKLEVEL)	800	if (prev__cctx->idle_sp == STACKLEVEL)
758	{	801	{
759	stack_put (prev__stack);	802	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		803	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		804
760	prev->stack = 0;	805	prev->cctx = 0;
		806
		807	cctx_put (prev__cctx);
		808	prev__cctx->inuse = 0;
761	}	809	}
762		810
763	if (!next->stack)	811	if (!next->cctx)
764	next->stack = stack_get ();
765
766	if (prev__stack != next->stack)
767	{	812	{
768	prev__stack->top_env = PL_top_env;	813	next->cctx = cctx_get (aTHX);
769	PL_top_env = next->stack->top_env;	814	assert (!next->cctx->inuse);
770	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	815	next->cctx->inuse = 1;
771	}	816	}
772		817
		818	if (prev__cctx != next->cctx)
		819	{
		820	prev__cctx->top_env = PL_top_env;
		821	PL_top_env = next->cctx->top_env;
		822	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		823	}
		824
773	free_coro_mortal ();	825	free_coro_mortal (aTHX);
774
775	UNLOCK;	826	UNLOCK;
776	}	827	}
777	}	828	}
778		829
779	struct transfer_args	830	struct transfer_args
780	{	831	{
781	struct coro *prev, *next;	832	struct coro *prev, *next;
782	int flags;
783	};	833	};
784		834
785	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	835	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
786		836
		837	/** high level stuff ********************************************************/
		838
787	static void	839	static int
788	coro_state_destroy (struct coro *coro)	840	coro_state_destroy (pTHX_ struct coro *coro)
789	{	841	{
790	if (coro->refcnt--)	842	if (coro->flags & CF_DESTROYED)
791	return;	843	return 0;
		844
		845	coro->flags |= CF_DESTROYED;
		846
		847	if (coro->flags & CF_READY)
		848	{
		849	/* reduce nready, as destroying a ready coro effectively unreadies it */
		850	/* alternative: look through all ready queues and remove the coro */
		851	LOCK;
		852	--coro_nready;
		853	UNLOCK;
		854	}
		855	else
		856	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
792		857
793	if (coro->mainstack && coro->mainstack != main_mainstack)	858	if (coro->mainstack && coro->mainstack != main_mainstack)
794	{	859	{
795	struct coro temp;	860	struct coro temp;
796		861
797	SAVE ((&temp), TRANSFER_SAVE_ALL);	862	assert (!(coro->flags & CF_RUNNING));
798	LOAD (coro);
799		863
		864	Zero (&temp, 1, struct coro);
		865	temp.save = CORO_SAVE_ALL;
		866
		867	if (coro->flags & CF_RUNNING)
		868	croak ("FATAL: tried to destroy currently running coroutine");
		869
		870	save_perl (aTHX_ &temp);
		871	load_perl (aTHX_ coro);
		872
800	coro_destroy_stacks ();	873	coro_destroy_stacks (aTHX);
801		874
802	LOAD ((&temp)); /* this will get rid of defsv etc.. */	875	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
803		876
804	coro->mainstack = 0;	877	coro->mainstack = 0;
805	}	878	}
806		879
807	stack_free (coro->stack);	880	cctx_destroy (coro->cctx);
808	SvREFCNT_dec (coro->args);	881	SvREFCNT_dec (coro->args);
809	Safefree (coro);	882
		883	return 1;
810	}	884	}
811		885
812	static int	886	static int
813	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	887	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
814	{	888	{
815	struct coro *coro = (struct coro *)mg->mg_ptr;	889	struct coro *coro = (struct coro *)mg->mg_ptr;
816	mg->mg_ptr = 0;	890	mg->mg_ptr = 0;
817		891
		892	if (--coro->refcnt < 0)
		893	{
818	coro_state_destroy (coro);	894	coro_state_destroy (aTHX_ coro);
		895	Safefree (coro);
		896	}
819		897
820	return 0;	898	return 0;
821	}	899	}
822		900
823	static int	901	static int
…		…
830	return 0;	908	return 0;
831	}	909	}
832		910
833	static MGVTBL coro_state_vtbl = {	911	static MGVTBL coro_state_vtbl = {
834	0, 0, 0, 0,	912	0, 0, 0, 0,
835	coro_state_clear,	913	coro_state_free,
836	0,	914	0,
837	#ifdef MGf_DUP	915	#ifdef MGf_DUP
838	coro_state_dup,	916	coro_state_dup,
839	#else	917	#else
840	# define MGf_DUP 0	918	# define MGf_DUP 0
841	#endif	919	#endif
842	};	920	};
843		921
844	static struct coro *	922	static struct coro *
845	SvSTATE (SV *coro)	923	SvSTATE_ (pTHX_ SV *coro)
846	{	924	{
847	HV *stash;	925	HV *stash;
848	MAGIC *mg;	926	MAGIC *mg;
849		927
850	if (SvROK (coro))	928	if (SvROK (coro))
…		…
856	/* very slow, but rare, check */	934	/* very slow, but rare, check */
857	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	935	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
858	croak ("Coro::State object required");	936	croak ("Coro::State object required");
859	}	937	}
860		938
861	mg = SvMAGIC (coro);	939	mg = CORO_MAGIC (coro);
862	assert (mg->mg_type == PERL_MAGIC_ext);
863	return (struct coro *)mg->mg_ptr;	940	return (struct coro *)mg->mg_ptr;
864	}	941	}
865		942
		943	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		944
866	static void	945	static void
867	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	946	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
868	{	947	{
869	ta->prev = SvSTATE (prev);	948	ta->prev = SvSTATE (prev_sv);
870	ta->next = SvSTATE (next);	949	ta->next = SvSTATE (next_sv);
871	ta->flags = flags;
872	}	950	}
873		951
874	static void	952	static void
875	api_transfer (SV *prev, SV *next, int flags)	953	api_transfer (SV *prev_sv, SV *next_sv)
876	{	954	{
877	dTHX;	955	dTHX;
878	struct transfer_args ta;	956	struct transfer_args ta;
879		957
880	prepare_transfer (&ta, prev, next, flags);	958	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
881	TRANSFER (ta);	959	TRANSFER (ta);
882	}	960	}
883		961
		962	static int
		963	api_save (SV *coro_sv, int new_save)
		964	{
		965	dTHX;
		966	struct coro *coro = SvSTATE (coro_sv);
		967	int old_save = coro->save;
		968
		969	if (new_save >= 0)
		970	coro->save = new_save;
		971
		972	return old_save;
		973	}
		974
884	/** Coro ********************************************************************/	975	/** Coro ********************************************************************/
885		976
886	#define PRIO_MAX 3
887	#define PRIO_HIGH 1
888	#define PRIO_NORMAL 0
889	#define PRIO_LOW -1
890	#define PRIO_IDLE -3
891	#define PRIO_MIN -4
892
893	/* for Coro.pm */
894	static GV *coro_current, *coro_idle;
895	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
896	static int coro_nready;
897
898	static void	977	static void
899	coro_enq (SV *sv)	978	coro_enq (pTHX_ SV *coro_sv)
900	{	979	{
901	int prio;
902
903	if (SvTYPE (sv) != SVt_PVHV)
904	croak ("Coro::ready tried to enqueue something that is not a coroutine");
905
906	prio = SvSTATE (sv)->prio;
907
908	av_push (coro_ready [prio - PRIO_MIN], sv);	980	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
909	coro_nready++;
910	}	981	}
911		982
912	static SV *	983	static SV *
913	coro_deq (int min_prio)	984	coro_deq (pTHX_ int min_prio)
914	{	985	{
915	int prio = PRIO_MAX - PRIO_MIN;	986	int prio = PRIO_MAX - PRIO_MIN;
916		987
917	min_prio -= PRIO_MIN;	988	min_prio -= PRIO_MIN;
918	if (min_prio < 0)	989	if (min_prio < 0)
919	min_prio = 0;	990	min_prio = 0;
920		991
921	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	992	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
922	if (AvFILLp (coro_ready [prio]) >= 0)	993	if (AvFILLp (coro_ready [prio]) >= 0)
923	{
924	coro_nready--;
925	return av_shift (coro_ready [prio]);	994	return av_shift (coro_ready [prio]);
926	}
927		995
928	return 0;	996	return 0;
929	}	997	}
930		998
931	static void	999	static int
932	api_ready (SV *coro)	1000	api_ready (SV *coro_sv)
933	{	1001	{
934	dTHX;	1002	dTHX;
		1003	struct coro *coro;
935		1004
936	if (SvROK (coro))	1005	if (SvROK (coro_sv))
937	coro = SvRV (coro);	1006	coro_sv = SvRV (coro_sv);
		1007
		1008	coro = SvSTATE (coro_sv);
		1009
		1010	if (coro->flags & CF_READY)
		1011	return 0;
		1012
		1013	coro->flags |= CF_READY;
938		1014
939	LOCK;	1015	LOCK;
940	coro_enq (SvREFCNT_inc (coro));	1016	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1017	++coro_nready;
941	UNLOCK;	1018	UNLOCK;
942	}
943		1019
		1020	return 1;
		1021	}
		1022
944	static void	1023	static int
		1024	api_is_ready (SV *coro_sv)
		1025	{
		1026	dTHX;
		1027	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1028	}
		1029
		1030	static void
945	prepare_schedule (struct transfer_args *ta)	1031	prepare_schedule (pTHX_ struct transfer_args *ta)
946	{	1032	{
947	SV *current, *prev, *next;	1033	SV *prev_sv, *next_sv;
948
949	current = GvSV (coro_current);
950		1034
951	for (;;)	1035	for (;;)
952	{	1036	{
953	LOCK;	1037	LOCK;
954	next = coro_deq (PRIO_MIN);	1038	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1039
		1040	/* nothing to schedule: call the idle handler */
		1041	if (!next_sv)
		1042	{
		1043	dSP;
		1044	UNLOCK;
		1045
		1046	ENTER;
		1047	SAVETMPS;
		1048
		1049	PUSHMARK (SP);
		1050	PUTBACK;
		1051	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1052
		1053	FREETMPS;
		1054	LEAVE;
		1055	continue;
		1056	}
		1057
		1058	ta->next = SvSTATE (next_sv);
		1059
		1060	/* cannot transfer to destroyed coros, skip and look for next */
		1061	if (ta->next->flags & CF_DESTROYED)
		1062	{
		1063	UNLOCK;
		1064	SvREFCNT_dec (next_sv);
		1065	/* coro_nready is already taken care of by destroy */
		1066	continue;
		1067	}
		1068
		1069	--coro_nready;
955	UNLOCK;	1070	UNLOCK;
956
957	if (next)
958	break;	1071	break;
959
960	{
961	dSP;
962
963	ENTER;
964	SAVETMPS;
965
966	PUSHMARK (SP);
967	PUTBACK;
968	call_sv (GvSV (coro_idle), G_DISCARD);
969
970	FREETMPS;
971	LEAVE;
972	}	1072	}
973	}
974
975	prev = SvRV (current);
976	SvRV (current) = next;
977		1073
978	/* free this only after the transfer */	1074	/* free this only after the transfer */
		1075	prev_sv = SvRV (coro_current);
		1076	SvRV_set (coro_current, next_sv);
		1077	ta->prev = SvSTATE (prev_sv);
		1078
		1079	assert (ta->next->flags & CF_READY);
		1080	ta->next->flags &= ~CF_READY;
		1081
979	LOCK;	1082	LOCK;
980	free_coro_mortal ();	1083	free_coro_mortal (aTHX);
		1084	coro_mortal = prev_sv;
981	UNLOCK;	1085	UNLOCK;
982	coro_mortal = prev;
983
984	ta->prev = SvSTATE (prev);
985	ta->next = SvSTATE (next);
986	ta->flags = TRANSFER_SAVE_ALL;
987	}	1086	}
988		1087
989	static void	1088	static void
990	prepare_cede (struct transfer_args *ta)	1089	prepare_cede (pTHX_ struct transfer_args *ta)
991	{	1090	{
992	LOCK;	1091	api_ready (coro_current);
993	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
994	UNLOCK;
995
996	prepare_schedule (ta);	1092	prepare_schedule (aTHX_ ta);
		1093	}
		1094
		1095	static int
		1096	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1097	{
		1098	if (coro_nready)
		1099	{
		1100	SV *prev = SvRV (coro_current);
		1101	prepare_schedule (aTHX_ ta);
		1102	api_ready (prev);
		1103	return 1;
		1104	}
		1105	else
		1106	return 0;
997	}	1107	}
998		1108
999	static void	1109	static void
1000	api_schedule (void)	1110	api_schedule (void)
1001	{	1111	{
1002	dTHX;	1112	dTHX;
1003	struct transfer_args ta;	1113	struct transfer_args ta;
1004		1114
1005	prepare_schedule (&ta);	1115	prepare_schedule (aTHX_ &ta);
1006	TRANSFER (ta);	1116	TRANSFER (ta);
1007	}	1117	}
1008		1118
1009	static void	1119	static int
1010	api_cede (void)	1120	api_cede (void)
1011	{	1121	{
1012	dTHX;	1122	dTHX;
1013	struct transfer_args ta;	1123	struct transfer_args ta;
1014		1124
1015	prepare_cede (&ta);	1125	prepare_cede (aTHX_ &ta);
		1126
		1127	if (ta.prev != ta.next)
		1128	{
1016	TRANSFER (ta);	1129	TRANSFER (ta);
		1130	return 1;
		1131	}
		1132	else
		1133	return 0;
		1134	}
		1135
		1136	static int
		1137	api_cede_notself (void)
		1138	{
		1139	dTHX;
		1140	struct transfer_args ta;
		1141
		1142	if (prepare_cede_notself (aTHX_ &ta))
		1143	{
		1144	TRANSFER (ta);
		1145	return 1;
		1146	}
		1147	else
		1148	return 0;
1017	}	1149	}
1018		1150
1019	MODULE = Coro::State PACKAGE = Coro::State	1151	MODULE = Coro::State PACKAGE = Coro::State
1020		1152
1021	PROTOTYPES: DISABLE	1153	PROTOTYPES: DISABLE
…		…
1027	#endif	1159	#endif
1028	BOOT_PAGESIZE;	1160	BOOT_PAGESIZE;
1029		1161
1030	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1162	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1031		1163
1032	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1164	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1033	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1165	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1034	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1166	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1167	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1168	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1035		1169
1036	main_mainstack = PL_mainstack;	1170	main_mainstack = PL_mainstack;
1037		1171
1038	coroapi.ver = CORO_API_VERSION;	1172	coroapi.ver = CORO_API_VERSION;
1039	coroapi.transfer = api_transfer;	1173	coroapi.transfer = api_transfer;
…		…
1049	HV *hv;	1183	HV *hv;
1050	int i;	1184	int i;
1051		1185
1052	Newz (0, coro, 1, struct coro);	1186	Newz (0, coro, 1, struct coro);
1053	coro->args = newAV ();	1187	coro->args = newAV ();
		1188	coro->save = CORO_SAVE_ALL;
		1189	coro->flags = CF_NEW;
1054		1190
1055	hv = newHV ();	1191	hv = newHV ();
1056	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1192	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1057	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1193	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1058		1194
1059	for (i = 1; i < items; i++)	1195	for (i = 1; i < items; i++)
1060	av_push (coro->args, newSVsv (ST (i)));	1196	av_push (coro->args, newSVsv (ST (i)));
1061
1062	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1063	/*coro->stack = 0;*/
1064	}	1197	}
1065	OUTPUT:	1198	OUTPUT:
		1199	RETVAL
		1200
		1201	int
		1202	save (SV *coro, int new_save = -1)
		1203	CODE:
		1204	RETVAL = api_save (coro, new_save);
		1205	OUTPUT:
1066	RETVAL	1206	RETVAL
1067		1207
1068	void	1208	void
1069	_set_stacklevel (...)	1209	_set_stacklevel (...)
1070	ALIAS:	1210	ALIAS:
1071	Coro::State::transfer = 1	1211	Coro::State::transfer = 1
1072	Coro::schedule = 2	1212	Coro::schedule = 2
1073	Coro::cede = 3	1213	Coro::cede = 3
1074	Coro::Cont::yield = 4	1214	Coro::cede_notself = 4
1075	CODE:	1215	CODE:
1076	{	1216	{
1077	struct transfer_args ta;	1217	struct transfer_args ta;
1078		1218
1079	switch (ix)	1219	switch (ix)
1080	{	1220	{
1081	case 0:	1221	case 0:
1082	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1222	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1083	ta.next = 0;	1223	ta.next = 0;
1084	ta.flags = TRANSFER_SET_STACKLEVEL;
1085	break;	1224	break;
1086		1225
1087	case 1:	1226	case 1:
1088	if (items != 3)	1227	if (items != 2)
1089	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1228	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1090		1229
1091	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1230	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1092	break;	1231	break;
1093		1232
1094	case 2:	1233	case 2:
1095	prepare_schedule (&ta);	1234	prepare_schedule (aTHX_ &ta);
1096	break;	1235	break;
1097		1236
1098	case 3:	1237	case 3:
1099	prepare_cede (&ta);	1238	prepare_cede (aTHX_ &ta);
1100	break;	1239	break;
1101		1240
1102	case 4:	1241	case 4:
1103	{	1242	if (!prepare_cede_notself (aTHX_ &ta))
1104	SV *yieldstack;	1243	XSRETURN_EMPTY;
1105	SV *sv;
1106	AV *defav = GvAV (PL_defgv);
1107		1244
1108	yieldstack = *hv_fetch (
1109	(HV *)SvRV (GvSV (coro_current)),
1110	"yieldstack", sizeof ("yieldstack") - 1,
1111	0
1112	);
1113
1114	/* set up @_ -- ugly */
1115	av_clear (defav);
1116	av_fill (defav, items - 1);
1117	while (items--)
1118	av_store (defav, items, SvREFCNT_inc (ST(items)));
1119
1120	sv = av_pop ((AV *)SvRV (yieldstack));
1121	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1122	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1123	ta.flags = 0;
1124	SvREFCNT_dec (sv);
1125	}
1126	break;	1245	break;
1127
1128	}	1246	}
1129		1247
		1248	BARRIER;
1130	TRANSFER (ta);	1249	TRANSFER (ta);
1131	}
1132		1250
1133	void	1251	if (GIMME_V != G_VOID && ta.next != ta.prev)
1134	_clone_state_from (SV *dst, SV *src)	1252	XSRETURN_YES;
		1253	}
		1254
		1255	bool
		1256	_destroy (SV *coro_sv)
1135	CODE:	1257	CODE:
1136	{	1258	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1137	struct coro *coro_src = SvSTATE (src);	1259	OUTPUT:
1138		1260	RETVAL
1139	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1140
1141	++coro_src->refcnt;
1142	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1143	}
1144		1261
1145	void	1262	void
1146	_exit (code)	1263	_exit (code)
1147	int code	1264	int code
1148	PROTOTYPE: $	1265	PROTOTYPE: $
1149	CODE:	1266	CODE:
1150	_exit (code);	1267	_exit (code);
1151		1268
		1269	int
		1270	cctx_stacksize (int new_stacksize = 0)
		1271	CODE:
		1272	RETVAL = coro_stacksize;
		1273	if (new_stacksize)
		1274	coro_stacksize = new_stacksize;
		1275	OUTPUT:
		1276	RETVAL
		1277
		1278	int
		1279	cctx_count ()
		1280	CODE:
		1281	RETVAL = cctx_count;
		1282	OUTPUT:
		1283	RETVAL
		1284
		1285	int
		1286	cctx_idle ()
		1287	CODE:
		1288	RETVAL = cctx_idle;
		1289	OUTPUT:
		1290	RETVAL
		1291
1152	MODULE = Coro::State PACKAGE = Coro	1292	MODULE = Coro::State PACKAGE = Coro
1153		1293
1154	BOOT:	1294	BOOT:
1155	{	1295	{
1156	int i;	1296	int i;
…		…
1162	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1302	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1163	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1303	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1164	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1304	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1165	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1305	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1166		1306
1167	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1307	coro_current = get_sv ("Coro::current", FALSE);
1168	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1308	SvREADONLY_on (coro_current);
1169		1309
1170	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1310	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1171	coro_ready[i] = newAV ();	1311	coro_ready[i] = newAV ();
1172		1312
1173	{	1313	{
1174	SV *sv = perl_get_sv("Coro::API", 1);	1314	SV *sv = perl_get_sv("Coro::API", 1);
1175		1315
1176	coroapi.schedule = api_schedule;	1316	coroapi.schedule = api_schedule;
		1317	coroapi.save = api_save;
1177	coroapi.cede = api_cede;	1318	coroapi.cede = api_cede;
		1319	coroapi.cede_notself = api_cede_notself;
1178	coroapi.ready = api_ready;	1320	coroapi.ready = api_ready;
		1321	coroapi.is_ready = api_is_ready;
1179	coroapi.nready = &coro_nready;	1322	coroapi.nready = &coro_nready;
1180	coroapi.current = coro_current;	1323	coroapi.current = coro_current;
1181		1324
1182	GCoroAPI = &coroapi;	1325	GCoroAPI = &coroapi;
1183	sv_setiv (sv, (IV)&coroapi);	1326	sv_setiv (sv, (IV)&coroapi);
1184	SvREADONLY_on (sv);	1327	SvREADONLY_on (sv);
1185	}	1328	}
1186	}	1329	}
		1330
		1331	void
		1332	_set_current (SV *current)
		1333	PROTOTYPE: $
		1334	CODE:
		1335	SvREFCNT_dec (SvRV (coro_current));
		1336	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1187		1337
1188	int	1338	int
1189	prio (Coro::State coro, int newprio = 0)	1339	prio (Coro::State coro, int newprio = 0)
1190	ALIAS:	1340	ALIAS:
1191	nice = 1	1341	nice = 1
…		…
1194	RETVAL = coro->prio;	1344	RETVAL = coro->prio;
1195		1345
1196	if (items > 1)	1346	if (items > 1)
1197	{	1347	{
1198	if (ix)	1348	if (ix)
1199	newprio += coro->prio;	1349	newprio = coro->prio - newprio;
1200		1350
1201	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1351	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1202	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1352	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1203		1353
1204	coro->prio = newprio;	1354	coro->prio = newprio;
1205	}	1355	}
1206	}	1356	}
		1357	OUTPUT:
		1358	RETVAL
1207		1359
1208	void	1360	SV *
1209	ready (SV *self)	1361	ready (SV *self)
1210	PROTOTYPE: $	1362	PROTOTYPE: $
1211	CODE:	1363	CODE:
1212	api_ready (self);	1364	RETVAL = boolSV (api_ready (self));
		1365	OUTPUT:
		1366	RETVAL
		1367
		1368	SV *
		1369	is_ready (SV *self)
		1370	PROTOTYPE: $
		1371	CODE:
		1372	RETVAL = boolSV (api_is_ready (self));
		1373	OUTPUT:
		1374	RETVAL
1213		1375
1214	int	1376	int
1215	nready (...)	1377	nready (...)
1216	PROTOTYPE:	1378	PROTOTYPE:
1217	CODE:	1379	CODE:
…		…
1223		1385
1224	SV *	1386	SV *
1225	_get_state ()	1387	_get_state ()
1226	CODE:	1388	CODE:
1227	{	1389	{
1228	struct {	1390	struct io_state *data;
1229	int errorno;
1230	int laststype;
1231	int laststatval;
1232	Stat_t statcache;
1233	} data;
1234		1391
		1392	RETVAL = newSV (sizeof (struct io_state));
		1393	data = (struct io_state *)SvPVX (RETVAL);
		1394	SvCUR_set (RETVAL, sizeof (struct io_state));
		1395	SvPOK_only (RETVAL);
		1396
1235	data.errorno = errno;	1397	data->errorno = errno;
1236	data.laststype = PL_laststype;	1398	data->laststype = PL_laststype;
1237	data.laststatval = PL_laststatval;	1399	data->laststatval = PL_laststatval;
1238	data.statcache = PL_statcache;	1400	data->statcache = PL_statcache;
1239
1240	RETVAL = newSVpvn ((char *)&data, sizeof data);
1241	}	1401	}
1242	OUTPUT:	1402	OUTPUT:
1243	RETVAL	1403	RETVAL
1244		1404
1245	void	1405	void
1246	_set_state (char *data_)	1406	_set_state (char *data_)
1247	PROTOTYPE: $	1407	PROTOTYPE: $
1248	CODE:	1408	CODE:
1249	{	1409	{
1250	struct {	1410	struct io_state *data = (void *)data_;
1251	int errorno;
1252	int laststype;
1253	int laststatval;
1254	Stat_t statcache;
1255	} *data = (void *)data_;
1256		1411
1257	errno = data->errorno;	1412	errno = data->errorno;
1258	PL_laststype = data->laststype;	1413	PL_laststype = data->laststype;
1259	PL_laststatval = data->laststatval;	1414	PL_laststatval = data->laststatval;
1260	PL_statcache = data->statcache;	1415	PL_statcache = data->statcache;
1261	}	1416	}
		1417

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