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Comparing Coro/Coro/State.xs (file contents):
Revision 1.100 by root, Mon Nov 27 00:07:49 2006 UTC vs.
Revision 1.148 by root, Fri Apr 13 12:56:55 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 */
		134	static JMPENV *main_top_env;
98	static HV *coro_state_stash, *coro_stash;	135	static HV *coro_state_stash, *coro_stash;
99	static SV *coro_mortal; /* will be freed after next transfer */	136	static SV *coro_mortal; /* will be freed after next transfer */
100		137
		138	static struct coro_cctx *cctx_first;
		139	static int cctx_count, cctx_idle;
		140
101	/* this is a structure representing a c-level coroutine */	141	/* this is a structure representing a c-level coroutine */
102	typedef struct coro_stack {	142	typedef struct coro_cctx {
103	struct coro_stack *next;	143	struct coro_cctx *next;
104		144
105	/* the stack */	145	/* the stack */
106	void *sptr;	146	void *sptr;
107	long ssize; /* positive == mmap, otherwise malloc */	147	size_t ssize;
108		148
109	/* cpu state */	149	/* cpu state */
110	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	150	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		151	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
111	JMPENV *top_env;	152	JMPENV *top_env;
112	coro_context cctx;	153	coro_context cctx;
113	} coro_stack;	154
		155	#if CORO_USE_VALGRIND
		156	int valgrind_id;
		157	#endif
		158	char inuse, mapped;
		159	} coro_cctx;
		160
		161	enum {
		162	CF_RUNNING = 0x0001, /* coroutine is running */
		163	CF_READY = 0x0002, /* coroutine is ready */
		164	CF_NEW = 0x0004, /* has never been switched to */
		165	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		166	};
114		167
115	/* this is a structure representing a perl-level coroutine */	168	/* this is a structure representing a perl-level coroutine */
116	struct coro {	169	struct coro {
117	/* the c coroutine allocated to this perl coroutine, if any */	170	/* the c coroutine allocated to this perl coroutine, if any */
118	coro_stack *stack;	171	coro_cctx *cctx;
119		172
120	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
121	AV *args;	174	AV *args;
122	int refcnt;	175	int refcnt;
		176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
123		178
124	/* optionally saved, might be zero */	179	/* optionally saved, might be zero */
125	AV *defav;	180	AV *defav; /* @_ */
126	SV *defsv;	181	SV *defsv; /* $_ */
127	SV *errsv;	182	SV *errsv; /* $@ */
		183	GV *deffh; /* default filehandle */
		184	SV *irssv; /* $/ */
		185	SV *irssv_sv; /* real $/ cache */
128		186
129	/* saved global state not related to stacks */	187	#define VAR(name,type) type name;
130	U8 dowarn;	188	# include "state.h"
131	I32 in_eval;	189	#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		190
163	/* coro process data */	191	/* coro process data */
164	int prio;	192	int prio;
165	};	193	};
166		194
167	typedef struct coro *Coro__State;	195	typedef struct coro *Coro__State;
168	typedef struct coro *Coro__State_or_hashref;	196	typedef struct coro *Coro__State_or_hashref;
169		197
		198	/** Coro ********************************************************************/
		199
		200	#define PRIO_MAX 3
		201	#define PRIO_HIGH 1
		202	#define PRIO_NORMAL 0
		203	#define PRIO_LOW -1
		204	#define PRIO_IDLE -3
		205	#define PRIO_MIN -4
		206
		207	/* for Coro.pm */
		208	static SV *coro_current;
		209	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		210	static int coro_nready;
		211
		212	/** lowlevel stuff **********************************************************/
		213
170	static AV *	214	static AV *
171	coro_clone_padlist (CV *cv)	215	coro_clone_padlist (pTHX_ CV *cv)
172	{	216	{
173	AV *padlist = CvPADLIST (cv);	217	AV *padlist = CvPADLIST (cv);
174	AV *newpadlist, *newpad;	218	AV *newpadlist, *newpad;
175		219
176	newpadlist = newAV ();	220	newpadlist = newAV ();
…		…
188		232
189	return newpadlist;	233	return newpadlist;
190	}	234	}
191		235
192	static void	236	static void
193	free_padlist (AV *padlist)	237	free_padlist (pTHX_ AV *padlist)
194	{	238	{
195	/* may be during global destruction */	239	/* may be during global destruction */
196	if (SvREFCNT (padlist))	240	if (SvREFCNT (padlist))
197	{	241	{
198	I32 i = AvFILLp (padlist);	242	I32 i = AvFILLp (padlist);
…		…
219	AV *padlist;	263	AV *padlist;
220	AV *av = (AV *)mg->mg_obj;	264	AV *av = (AV *)mg->mg_obj;
221		265
222	/* casting is fun. */	266	/* casting is fun. */
223	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	267	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
224	free_padlist (padlist);	268	free_padlist (aTHX_ padlist);
225		269
226	SvREFCNT_dec (av);	270	SvREFCNT_dec (av);
227		271
228	return 0;	272	return 0;
229	}	273	}
230		274
231	#define PERL_MAGIC_coro PERL_MAGIC_ext	275	#define PERL_MAGIC_coro PERL_MAGIC_ext
232		276
233	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	277	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
234		278
		279	#define CORO_MAGIC(cv) \
		280	SvMAGIC (cv) \
		281	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		282	? SvMAGIC (cv) \
		283	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		284	: 0
		285
235	/* the next two functions merely cache the padlists */	286	/* the next two functions merely cache the padlists */
236	static void	287	static void
237	get_padlist (CV *cv)	288	get_padlist (pTHX_ CV *cv)
238	{	289	{
239	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	290	MAGIC *mg = CORO_MAGIC (cv);
		291	AV *av;
240		292
241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	293	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
242	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	294	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	295	else
244	{	296	{
245	#if 0	297	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	298	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	299	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	300	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	301	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	302	SvREFCNT_dec (cp);
251	#else	303	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	304	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	305	#endif
254	}	306	}
255	}	307	}
256		308
257	static void	309	static void
258	put_padlist (CV *cv)	310	put_padlist (pTHX_ CV *cv)
259	{	311	{
260	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	312	MAGIC *mg = CORO_MAGIC (cv);
		313	AV *av;
261		314
262	if (!mg)	315	if (!mg)
263	{	316	{
264	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	317	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	318	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266	mg->mg_virtual = &vtbl_coro;	319	mg->mg_virtual = &vtbl_coro;
267	mg->mg_obj = (SV *)newAV ();	320	mg->mg_obj = (SV *)newAV ();
268	}	321	}
269		322
270	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	323	av = (AV *)mg->mg_obj;
		324
		325	if (AvFILLp (av) >= AvMAX (av))
		326	av_extend (av, AvMAX (av) + 1);
		327
		328	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
271	}	329	}
		330
		331	/** load & save, init *******************************************************/
272		332
273	#define SB do {	333	#define SB do {
274	#define SE } while (0)	334	#define SE } while (0)
275		335
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	336	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
280		337
281	static void	338	static void
282	load_state(Coro__State c)	339	load_perl (pTHX_ Coro__State c)
283	{	340	{
284	PL_dowarn = c->dowarn;	341	#define VAR(name,type) PL_ ## name = c->name;
285	PL_in_eval = c->in_eval;	342	# include "state.h"
286		343	#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		344
318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	345	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	346	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	347	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		348	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		349
		350	if (c->irssv)
		351	{
		352	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		353	{
		354	SvREFCNT_dec (c->irssv);
		355	c->irssv = 0;
		356	}
		357	else
		358	{
		359	REPLACE_SV (PL_rs, c->irssv);
		360	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		361	sv_setsv (c->irssv_sv, PL_rs);
		362	}
		363	}
321		364
322	{	365	{
323	dSP;	366	dSP;
324	CV *cv;	367	CV *cv;
325		368
326	/* now do the ugly restore mess */	369	/* now do the ugly restore mess */
327	while ((cv = (CV *)POPs))	370	while ((cv = (CV *)POPs))
328	{	371	{
329	AV *padlist = (AV *)POPs;
330
331	if (padlist)
332	{
333	put_padlist (cv); /* mark this padlist as available */	372	put_padlist (aTHX_ cv); /* mark this padlist as available */
334	CvPADLIST(cv) = padlist;	373	CvDEPTH (cv) = PTR2IV (POPs);
335	}	374	CvPADLIST (cv) = (AV *)POPs;
336
337	++CvDEPTH(cv);
338	}	375	}
339		376
340	PUTBACK;	377	PUTBACK;
341	}	378	}
		379	assert (!PL_comppad || AvARRAY (PL_comppad));//D
342	}	380	}
343		381
344	static void	382	static void
345	save_state(Coro__State c, int flags)	383	save_perl (pTHX_ Coro__State c)
346	{	384	{
		385	assert (!PL_comppad || AvARRAY (PL_comppad));//D
347	{	386	{
348	dSP;	387	dSP;
349	I32 cxix = cxstack_ix;	388	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	389	PERL_CONTEXT *ccstk = cxstack;
351	PERL_SI *top_si = PL_curstackinfo;	390	PERL_SI *top_si = PL_curstackinfo;
…		…
353	/*	392	/*
354	* the worst thing you can imagine happens first - we have to save	393	* the worst thing you can imagine happens first - we have to save
355	* (and reinitialize) all cv's in the whole callchain :(	394	* (and reinitialize) all cv's in the whole callchain :(
356	*/	395	*/
357		396
		397	EXTEND (SP, 3 + 1);
358	PUSHs (Nullsv);	398	PUSHs (Nullsv);
359	/* this loop was inspired by pp_caller */	399	/* this loop was inspired by pp_caller */
360	for (;;)	400	for (;;)
361	{	401	{
362	while (cxix >= 0)	402	while (cxix >= 0)
363	{	403	{
364	PERL_CONTEXT *cx = &ccstk[cxix--];	404	PERL_CONTEXT *cx = &ccstk[cxix--];
365		405
366	if (CxTYPE(cx) == CXt_SUB)	406	if (CxTYPE (cx) == CXt_SUB)
367	{	407	{
368	CV *cv = cx->blk_sub.cv;	408	CV *cv = cx->blk_sub.cv;
		409
369	if (CvDEPTH(cv))	410	if (CvDEPTH (cv))
370	{	411	{
371	EXTEND (SP, CvDEPTH(cv)*2);	412	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));	413	PUSHs ((SV *)CvPADLIST (cv));
		414	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
381	PUSHs ((SV *)cv);	415	PUSHs ((SV *)cv);
382		416
		417	CvDEPTH (cv) = 0;
383	get_padlist (cv);	418	get_padlist (aTHX_ cv);
384	}	419	}
385	}	420	}
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	}	421	}
395		422
396	if (top_si->si_type == PERLSI_MAIN)	423	if (top_si->si_type == PERLSI_MAIN)
397	break;	424	break;
398		425
…		…
402	}	429	}
403		430
404	PUTBACK;	431	PUTBACK;
405	}	432	}
406		433
407	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	434	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;	435	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
409	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	436	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		437	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		438	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
410		439
411	c->dowarn = PL_dowarn;	440	#define VAR(name,type)c->name = PL_ ## name;
412	c->in_eval = PL_in_eval;	441	# include "state.h"
413		442	#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	}	443	}
445		444
446	/*	445	/*
447	* allocate various perl stacks. This is an exact copy	446	* allocate various perl stacks. This is an exact copy
448	* of perl.c:init_stacks, except that it uses less memory	447	* of perl.c:init_stacks, except that it uses less memory
449	* on the (sometimes correct) assumption that coroutines do	448	* on the (sometimes correct) assumption that coroutines do
450	* not usually need a lot of stackspace.	449	* not usually need a lot of stackspace.
451	*/	450	*/
		451	#if CORO_PREFER_PERL_FUNCTIONS
		452	# define coro_init_stacks init_stacks
		453	#else
452	static void	454	static void
453	coro_init_stacks ()	455	coro_init_stacks (pTHX)
454	{	456	{
455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	457	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
456	PL_curstackinfo->si_type = PERLSI_MAIN;	458	PL_curstackinfo->si_type = PERLSI_MAIN;
457	PL_curstack = PL_curstackinfo->si_stack;	459	PL_curstack = PL_curstackinfo->si_stack;
458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	460	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459		461
460	PL_stack_base = AvARRAY(PL_curstack);	462	PL_stack_base = AvARRAY(PL_curstack);
461	PL_stack_sp = PL_stack_base;	463	PL_stack_sp = PL_stack_base;
462	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	464	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463		465
464	New(50,PL_tmps_stack,96,SV*);	466	New(50,PL_tmps_stack,128,SV*);
465	PL_tmps_floor = -1;	467	PL_tmps_floor = -1;
466	PL_tmps_ix = -1;	468	PL_tmps_ix = -1;
467	PL_tmps_max = 96;	469	PL_tmps_max = 128;
468		470
469	New(54,PL_markstack,16,I32);	471	New(54,PL_markstack,32,I32);
470	PL_markstack_ptr = PL_markstack;	472	PL_markstack_ptr = PL_markstack;
471	PL_markstack_max = PL_markstack + 16;	473	PL_markstack_max = PL_markstack + 32;
472		474
473	#ifdef SET_MARK_OFFSET	475	#ifdef SET_MARK_OFFSET
474	SET_MARK_OFFSET;	476	SET_MARK_OFFSET;
475	#endif	477	#endif
476		478
477	New(54,PL_scopestack,16,I32);	479	New(54,PL_scopestack,32,I32);
478	PL_scopestack_ix = 0;	480	PL_scopestack_ix = 0;
479	PL_scopestack_max = 16;	481	PL_scopestack_max = 32;
480		482
481	New(54,PL_savestack,96,ANY);	483	New(54,PL_savestack,64,ANY);
482	PL_savestack_ix = 0;	484	PL_savestack_ix = 0;
483	PL_savestack_max = 96;	485	PL_savestack_max = 64;
484		486
485	#if !PERL_VERSION_ATLEAST (5,9,0)	487	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	488	New(54,PL_retstack,16,OP*);
487	PL_retstack_ix = 0;	489	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	490	PL_retstack_max = 16;
489	#endif	491	#endif
490	}	492	}
		493	#endif
491		494
492	/*	495	/*
493	* destroy the stacks, the callchain etc...	496	* destroy the stacks, the callchain etc...
494	*/	497	*/
495	static void	498	static void
496	destroy_stacks()	499	coro_destroy_stacks (pTHX)
497	{	500	{
498	if (!IN_DESTRUCT)	501	if (!IN_DESTRUCT)
499	{	502	{
500	/* is this ugly, I ask? */	503	/* restore all saved variables and stuff */
501	LEAVE_SCOPE (0);	504	LEAVE_SCOPE (0);
		505	assert (PL_tmps_floor == -1);
502		506
503	/* sure it is, but more important: is it correct?? :/ */	507	/* free all temporaries */
504	FREETMPS;	508	FREETMPS;
		509	assert (PL_tmps_ix == -1);
505		510
		511	/* unwind all extra stacks */
506	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	512	POPSTACK_TO (PL_mainstack);
		513
		514	/* unwind main stack */
		515	dounwind (-1);
507	}	516	}
508		517
509	while (PL_curstackinfo->si_next)	518	while (PL_curstackinfo->si_next)
510	PL_curstackinfo = PL_curstackinfo->si_next;	519	PL_curstackinfo = PL_curstackinfo->si_next;
511		520
512	while (PL_curstackinfo)	521	while (PL_curstackinfo)
513	{	522	{
514	PERL_SI *p = PL_curstackinfo->si_prev;	523	PERL_SI *p = PL_curstackinfo->si_prev;
515		524
516	{ /*D*//*remove*/
517	dSP;
518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519	PUTBACK; /* possibly superfluous */
520	}
521
522	if (!IN_DESTRUCT)	525	if (!IN_DESTRUCT)
523	{
524	dounwind (-1);/*D*//*remove*/
525	SvREFCNT_dec (PL_curstackinfo->si_stack);	526	SvREFCNT_dec (PL_curstackinfo->si_stack);
526	}
527		527
528	Safefree (PL_curstackinfo->si_cxstack);	528	Safefree (PL_curstackinfo->si_cxstack);
529	Safefree (PL_curstackinfo);	529	Safefree (PL_curstackinfo);
530	PL_curstackinfo = p;	530	PL_curstackinfo = p;
531	}	531	}
…		…
537	#if !PERL_VERSION_ATLEAST (5,9,0)	537	#if !PERL_VERSION_ATLEAST (5,9,0)
538	Safefree (PL_retstack);	538	Safefree (PL_retstack);
539	#endif	539	#endif
540	}	540	}
541		541
		542	/** coroutine stack handling ************************************************/
		543
542	static void	544	static void
543	setup_coro (struct coro *coro)	545	setup_coro (pTHX_ struct coro *coro)
544	{	546	{
545	/*	547	/*
546	* emulate part of the perl startup here.	548	* emulate part of the perl startup here.
547	*/	549	*/
548	dTHX;	550	coro_init_stacks (aTHX);
		551
		552	PL_curcop = &PL_compiling;
		553	PL_in_eval = EVAL_NULL;
		554	PL_comppad = 0;
		555	PL_curpm = 0;
		556	PL_localizing = 0;
		557	PL_dirty = 0;
		558	PL_restartop = 0;
		559
		560	{
		561	dSP;
		562	LOGOP myop;
		563
		564	SvREFCNT_dec (GvAV (PL_defgv));
		565	GvAV (PL_defgv) = coro->args; coro->args = 0;
		566
		567	Zero (&myop, 1, LOGOP);
		568	myop.op_next = Nullop;
		569	myop.op_flags = OPf_WANT_VOID;
		570
		571	PUSHMARK (SP);
		572	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		573	PUTBACK;
		574	PL_op = (OP *)&myop;
		575	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		576	SPAGAIN;
		577	}
		578
		579	ENTER; /* necessary e.g. for dounwind */
		580	}
		581
		582	static void
		583	free_coro_mortal (pTHX)
		584	{
		585	if (coro_mortal)
		586	{
		587	SvREFCNT_dec (coro_mortal);
		588	coro_mortal = 0;
		589	}
		590	}
		591
		592	/* inject a fake call to Coro::State::_cctx_init into the execution */
		593	/* _cctx_init shoukld be careful, as it could be called at almost any time */
		594	/* during execution of a pelr program */
		595	static void NOINLINE
		596	prepare_cctx (pTHX_ coro_cctx *cctx)
		597	{
549	dSP;	598	dSP;
550	UNOP myop;	599	LOGOP myop;
551	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
552		600
553	coro_init_stacks ();
554	/*PL_curcop = 0;*/
555	/*PL_in_eval = PL_in_eval;*/ /* inherit */
556	SvREFCNT_dec (GvAV (PL_defgv));
557	GvAV (PL_defgv) = coro->args; coro->args = 0;
558
559	SPAGAIN;
560
561	Zero (&myop, 1, UNOP);	601	Zero (&myop, 1, LOGOP);
562	myop.op_next = Nullop;	602	myop.op_next = PL_op;
563	myop.op_flags = OPf_WANT_VOID;	603	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
564		604
		605	PUSHMARK (SP);
		606	EXTEND (SP, 2);
		607	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		608	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		609	PUTBACK;
565	PL_op = (OP *)&myop;	610	PL_op = (OP *)&myop;
566
567	PUSHMARK(SP);
568	XPUSHs (sub_init);
569	PUTBACK;
570	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	611	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
571	SPAGAIN;	612	SPAGAIN;
572
573	ENTER; /* necessary e.g. for dounwind */
574	}	613	}
575		614
576	static void	615	/*
577	free_coro_mortal ()	616	* this is a _very_ stripped down perl interpreter ;)
578	{	617	*/
579	if (coro_mortal)
580	{
581	SvREFCNT_dec (coro_mortal);
582	coro_mortal = 0;
583	}
584	}
585
586	static void NOINLINE
587	prepare_cctx (coro_stack *cctx)
588	{
589	dSP;
590	UNOP myop;
591
592	Zero (&myop, 1, UNOP);
593	myop.op_next = PL_op;
594	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
595
596	PUSHMARK(SP);
597	EXTEND (SP, 2);
598	PUSHs (newSViv (PTR2IV (cctx)));
599	PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
600	PUTBACK;
601	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
602	SPAGAIN;
603	}
604
605	static void	618	static void
606	coro_run (void *arg)	619	coro_run (void *arg)
607	{	620	{
608	/*	621	dTHX;
609	* this is a _very_ stripped down perl interpreter ;)	622
610	*/	623	/* coro_run is the alternative tail of transfer(), so unlock here. */
611	UNLOCK;	624	UNLOCK;
612		625
613	PL_top_env = &PL_start_env;	626	PL_top_env = &PL_start_env;
		627
		628	/* inject a fake subroutine call to cctx_init */
614	prepare_cctx ((coro_stack *)arg);	629	prepare_cctx (aTHX_ (coro_cctx *)arg);
615		630
616	/* somebody will hit me for both perl_run and PL_restartop */	631	/* somebody or something will hit me for both perl_run and PL_restartop */
617	perl_run (PERL_GET_CONTEXT);	632	PL_restartop = PL_op;
		633	perl_run (PL_curinterp);
618		634
619	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);	635	/* If perl-run returns we assume exit() was being called, which */
620	abort ();	636	/* seems to be the only valid (non-bug) reason for perl_run to return. */
		637	/* We try to exit by jumping to the bootstrap-time "top" top_env, as */
		638	/* we cannot restore the "main" coroutine as Coro has no such concept */
		639	PL_top_env = main_top_env;
		640	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
621	}	641	}
622		642
623	static coro_stack *	643	static coro_cctx *
624	stack_new ()	644	cctx_new ()
625	{	645	{
626	coro_stack *stack;	646	coro_cctx *cctx;
		647	void *stack_start;
		648	size_t stack_size;
627		649
		650	++cctx_count;
		651
628	New (0, stack, 1, coro_stack);	652	Newz (0, cctx, 1, coro_cctx);
629		653
630	#if HAVE_MMAP	654	#if HAVE_MMAP
631		655
632	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	656	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
633	/* mmap suppsedly does allocate-on-write for us */	657	/* mmap supposedly does allocate-on-write for us */
634	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	658	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
635		659
636	if (stack->sptr == (void *)-1)	660	if (cctx->sptr != (void *)-1)
637	{
638	perror ("FATAL: unable to mmap stack for coroutine");
639	_exit (EXIT_FAILURE);
640	}	661	{
641
642	# if STACKGUARD	662	# if CORO_STACKGUARD
643	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	663	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
644	# endif	664	# endif
645		665	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
646	#else	666	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
647		667	cctx->mapped = 1;
648	stack->ssize = STACKSIZE * (long)sizeof (long);
649	New (0, stack->sptr, STACKSIZE, long);
650
651	if (!stack->sptr)
652	{	668	}
		669	else
		670	#endif
		671	{
		672	cctx->ssize = coro_stacksize * (long)sizeof (long);
		673	New (0, cctx->sptr, coro_stacksize, long);
		674
		675	if (!cctx->sptr)
		676	{
653	perror (stderr, "FATAL: unable to malloc stack for coroutine");	677	perror ("FATAL: unable to allocate stack for coroutine");
654	_exit (EXIT_FAILURE);	678	_exit (EXIT_FAILURE);
655	}	679	}
656		680
657	#endif	681	stack_start = cctx->sptr;
		682	stack_size = cctx->ssize;
		683	}
658		684
		685	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
659	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	686	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
660		687
661	return stack;	688	return cctx;
662	}	689	}
663		690
664	static void	691	static void
665	stack_free (coro_stack *stack)	692	cctx_destroy (coro_cctx *cctx)
666	{	693	{
667	if (!stack)	694	if (!cctx)
668	return;	695	return;
669		696
		697	--cctx_count;
		698
		699	#if CORO_USE_VALGRIND
		700	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		701	#endif
		702
670	#if HAVE_MMAP	703	#if HAVE_MMAP
		704	if (cctx->mapped)
671	munmap (stack->sptr, stack->ssize);	705	munmap (cctx->sptr, cctx->ssize);
672	#else
673	Safefree (stack->sptr);
674	#endif
675
676	Safefree (stack);
677	}
678
679	static coro_stack *stack_first;
680
681	static coro_stack *
682	stack_get ()
683	{
684	coro_stack *stack;
685
686	if (stack_first)
687	{
688	stack = stack_first;
689	stack_first = stack->next;
690	}
691	else	706	else
		707	#endif
		708	Safefree (cctx->sptr);
		709
		710	Safefree (cctx);
		711	}
		712
		713	static coro_cctx *
		714	cctx_get (pTHX)
		715	{
		716	while (cctx_first)
692	{	717	{
693	stack = stack_new ();	718	coro_cctx *cctx = cctx_first;
		719	cctx_first = cctx->next;
		720	--cctx_idle;
		721
		722	if (cctx->ssize >= coro_stacksize)
		723	return cctx;
		724
		725	cctx_destroy (cctx);
		726	}
		727
694	PL_op = PL_op->op_next;	728	PL_op = PL_op->op_next;
		729	return cctx_new ();
		730	}
		731
		732	static void
		733	cctx_put (coro_cctx *cctx)
		734	{
		735	/* free another cctx if overlimit */
		736	if (cctx_idle >= MAX_IDLE_CCTX)
		737	{
		738	coro_cctx *first = cctx_first;
		739	cctx_first = first->next;
		740	--cctx_idle;
		741
		742	assert (!first->inuse);
		743	cctx_destroy (first);
695	}	744	}
696		745
697	return stack;	746	++cctx_idle;
		747	cctx->next = cctx_first;
		748	cctx_first = cctx;
698	}	749	}
699		750
700	static void	751	/** coroutine switching *****************************************************/
701	stack_put (coro_stack *stack)
702	{
703	stack->next = stack_first;
704	stack_first = stack;
705	}
706		752
707	/* never call directly, always through the coro_state_transfer global variable */	753	/* never call directly, always through the coro_state_transfer global variable */
708	static void NOINLINE	754	static void NOINLINE
709	transfer (struct coro *prev, struct coro *next, int flags)	755	transfer (pTHX_ struct coro *prev, struct coro *next)
710	{	756	{
711	dSTACKLEVEL;	757	dSTACKLEVEL;
712		758
713	/* sometimes transfer is only called to set idle_sp */	759	/* sometimes transfer is only called to set idle_sp */
714	if (flags == TRANSFER_SET_STACKLEVEL)	760	if (!next)
		761	{
715	((coro_stack *)prev)->idle_sp = STACKLEVEL;	762	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		763	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		764	}
716	else if (prev != next)	765	else if (prev != next)
717	{	766	{
718	coro_stack *prev__stack;	767	coro_cctx *prev__cctx;
		768
		769	if (prev->flags & CF_NEW)
		770	{
		771	/* create a new empty context */
		772	Newz (0, prev->cctx, 1, coro_cctx);
		773	prev->cctx->inuse = 1;
		774	prev->flags &= ~CF_NEW;
		775	prev->flags |= CF_RUNNING;
		776	}
		777
		778	/*TODO: must not croak here */
		779	if (!prev->flags & CF_RUNNING)
		780	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		781
		782	if (next->flags & CF_RUNNING)
		783	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		784
		785	if (next->flags & CF_DESTROYED)
		786	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		787
		788	prev->flags &= ~CF_RUNNING;
		789	next->flags |= CF_RUNNING;
719		790
720	LOCK;	791	LOCK;
721		792
722	if (next->mainstack)	793	if (next->flags & CF_NEW)
723	{	794	{
724	/* coroutine already started */	795	/* need to start coroutine */
725	SAVE (prev, flags);	796	next->flags &= ~CF_NEW;
726	LOAD (next);	797	/* first get rid of the old state */
		798	save_perl (aTHX_ prev);
		799	/* setup coroutine call */
		800	setup_coro (aTHX_ next);
		801	/* need a new stack */
		802	assert (!next->cctx);
727	}	803	}
728	else	804	else
729	{	805	{
730	/* need to start coroutine */	806	/* coroutine already started */
731	/* first get rid of the old state */	807	save_perl (aTHX_ prev);
732	SAVE (prev, -1);	808	load_perl (aTHX_ next);
733	/* setup coroutine call */
734	setup_coro (next);
735	/* need a stack */
736	next->stack = 0;
737	}	809	}
738		810
739	if (!prev->stack)
740	/* create a new empty context */
741	Newz (0, prev->stack, 1, coro_stack);
742
743	prev__stack = prev->stack;	811	prev__cctx = prev->cctx;
744		812
745	/* possibly "free" the stack */	813	/* possibly "free" the cctx */
746	if (prev__stack->idle_sp == STACKLEVEL)	814	if (prev__cctx->idle_sp == STACKLEVEL)
747	{	815	{
748	stack_put (prev__stack);	816	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		817	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		818
749	prev->stack = 0;	819	prev->cctx = 0;
		820
		821	cctx_put (prev__cctx);
		822	prev__cctx->inuse = 0;
750	}	823	}
751		824
752	if (!next->stack)	825	if (!next->cctx)
753	next->stack = stack_get ();
754
755	if (prev__stack != next->stack)
756	{	826	{
757	prev__stack->top_env = PL_top_env;	827	next->cctx = cctx_get (aTHX);
758	PL_top_env = next->stack->top_env;	828	assert (!next->cctx->inuse);
759	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	829	next->cctx->inuse = 1;
760	}	830	}
761		831
		832	if (prev__cctx != next->cctx)
		833	{
		834	prev__cctx->top_env = PL_top_env;
		835	PL_top_env = next->cctx->top_env;
		836	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		837	}
		838
762	free_coro_mortal ();	839	free_coro_mortal (aTHX);
763
764	UNLOCK;	840	UNLOCK;
765	}	841	}
766	}	842	}
767		843
768	struct transfer_args	844	struct transfer_args
769	{	845	{
770	struct coro *prev, *next;	846	struct coro *prev, *next;
771	int flags;
772	};	847	};
773		848
774	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	849	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
775		850
		851	/** high level stuff ********************************************************/
		852
776	static void	853	static int
777	coro_state_destroy (struct coro *coro)	854	coro_state_destroy (pTHX_ struct coro *coro)
778	{	855	{
779	if (coro->refcnt--)	856	if (coro->flags & CF_DESTROYED)
780	return;	857	return 0;
		858
		859	coro->flags |= CF_DESTROYED;
		860
		861	if (coro->flags & CF_READY)
		862	{
		863	/* reduce nready, as destroying a ready coro effectively unreadies it */
		864	/* alternative: look through all ready queues and remove the coro */
		865	LOCK;
		866	--coro_nready;
		867	UNLOCK;
		868	}
		869	else
		870	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
781		871
782	if (coro->mainstack && coro->mainstack != main_mainstack)	872	if (coro->mainstack && coro->mainstack != main_mainstack)
783	{	873	{
784	struct coro temp;	874	struct coro temp;
785		875
786	SAVE ((&temp), TRANSFER_SAVE_ALL);	876	assert (!(coro->flags & CF_RUNNING));
787	LOAD (coro);
788		877
		878	Zero (&temp, 1, struct coro);
		879	temp.save = CORO_SAVE_DEF;
		880
		881	if (coro->flags & CF_RUNNING)
		882	croak ("FATAL: tried to destroy currently running coroutine");
		883
		884	save_perl (aTHX_ &temp);
		885	load_perl (aTHX_ coro);
		886
789	destroy_stacks ();	887	coro_destroy_stacks (aTHX);
790		888
791	LOAD ((&temp)); /* this will get rid of defsv etc.. */	889	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
792		890
793	coro->mainstack = 0;	891	coro->mainstack = 0;
794	}	892	}
795		893
796	stack_free (coro->stack);	894	cctx_destroy (coro->cctx);
797	SvREFCNT_dec (coro->args);	895	SvREFCNT_dec (coro->args);
798	Safefree (coro);	896
		897	return 1;
799	}	898	}
800		899
801	static int	900	static int
802	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	901	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
803	{	902	{
804	struct coro *coro = (struct coro *)mg->mg_ptr;	903	struct coro *coro = (struct coro *)mg->mg_ptr;
805	mg->mg_ptr = 0;	904	mg->mg_ptr = 0;
806		905
		906	if (--coro->refcnt < 0)
		907	{
807	coro_state_destroy (coro);	908	coro_state_destroy (aTHX_ coro);
		909	Safefree (coro);
		910	}
808		911
809	return 0;	912	return 0;
810	}	913	}
811		914
812	static int	915	static int
…		…
819	return 0;	922	return 0;
820	}	923	}
821		924
822	static MGVTBL coro_state_vtbl = {	925	static MGVTBL coro_state_vtbl = {
823	0, 0, 0, 0,	926	0, 0, 0, 0,
824	coro_state_clear,	927	coro_state_free,
825	0,	928	0,
826	#ifdef MGf_DUP	929	#ifdef MGf_DUP
827	coro_state_dup,	930	coro_state_dup,
		931	#else
		932	# define MGf_DUP 0
828	#endif	933	#endif
829	};	934	};
830		935
831	static struct coro *	936	static struct coro *
832	SvSTATE (SV *coro)	937	SvSTATE_ (pTHX_ SV *coro)
833	{	938	{
834	HV *stash;	939	HV *stash;
835	MAGIC *mg;	940	MAGIC *mg;
836		941
837	if (SvROK (coro))	942	if (SvROK (coro))
…		…
843	/* very slow, but rare, check */	948	/* very slow, but rare, check */
844	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	949	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
845	croak ("Coro::State object required");	950	croak ("Coro::State object required");
846	}	951	}
847		952
848	mg = SvMAGIC (coro);	953	mg = CORO_MAGIC (coro);
849	assert (mg->mg_type == PERL_MAGIC_ext);
850	return (struct coro *)mg->mg_ptr;	954	return (struct coro *)mg->mg_ptr;
851	}	955	}
852		956
		957	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		958
853	static void	959	static void
854	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	960	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
855	{	961	{
856	ta->prev = SvSTATE (prev);	962	ta->prev = SvSTATE (prev_sv);
857	ta->next = SvSTATE (next);	963	ta->next = SvSTATE (next_sv);
858	ta->flags = flags;
859	}	964	}
860		965
861	static void	966	static void
862	api_transfer (SV *prev, SV *next, int flags)	967	api_transfer (SV *prev_sv, SV *next_sv)
863	{	968	{
864	dTHX;	969	dTHX;
865	struct transfer_args ta;	970	struct transfer_args ta;
866		971
867	prepare_transfer (&ta, prev, next, flags);	972	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
868	TRANSFER (ta);	973	TRANSFER (ta);
869	}	974	}
870		975
		976	static int
		977	api_save (SV *coro_sv, int new_save)
		978	{
		979	dTHX;
		980	struct coro *coro = SvSTATE (coro_sv);
		981	int old_save = coro->save;
		982
		983	if (new_save >= 0)
		984	coro->save = new_save;
		985
		986	return old_save;
		987	}
		988
871	/** Coro ********************************************************************/	989	/** Coro ********************************************************************/
872		990
873	#define PRIO_MAX 3
874	#define PRIO_HIGH 1
875	#define PRIO_NORMAL 0
876	#define PRIO_LOW -1
877	#define PRIO_IDLE -3
878	#define PRIO_MIN -4
879
880	/* for Coro.pm */
881	static GV *coro_current, *coro_idle;
882	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883	static int coro_nready;
884
885	static void	991	static void
886	coro_enq (SV *sv)	992	coro_enq (pTHX_ SV *coro_sv)
887	{	993	{
888	int prio;
889
890	if (SvTYPE (sv) != SVt_PVHV)
891	croak ("Coro::ready tried to enqueue something that is not a coroutine");
892
893	prio = SvSTATE (sv)->prio;
894
895	av_push (coro_ready [prio - PRIO_MIN], sv);	994	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
896	coro_nready++;
897	}	995	}
898		996
899	static SV *	997	static SV *
900	coro_deq (int min_prio)	998	coro_deq (pTHX_ int min_prio)
901	{	999	{
902	int prio = PRIO_MAX - PRIO_MIN;	1000	int prio = PRIO_MAX - PRIO_MIN;
903		1001
904	min_prio -= PRIO_MIN;	1002	min_prio -= PRIO_MIN;
905	if (min_prio < 0)	1003	if (min_prio < 0)
906	min_prio = 0;	1004	min_prio = 0;
907		1005
908	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1006	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
909	if (AvFILLp (coro_ready [prio]) >= 0)	1007	if (AvFILLp (coro_ready [prio]) >= 0)
910	{
911	coro_nready--;
912	return av_shift (coro_ready [prio]);	1008	return av_shift (coro_ready [prio]);
913	}
914		1009
915	return 0;	1010	return 0;
916	}	1011	}
917		1012
918	static void	1013	static int
919	api_ready (SV *coro)	1014	api_ready (SV *coro_sv)
920	{	1015	{
921	dTHX;	1016	dTHX;
		1017	struct coro *coro;
922		1018
923	if (SvROK (coro))	1019	if (SvROK (coro_sv))
924	coro = SvRV (coro);	1020	coro_sv = SvRV (coro_sv);
		1021
		1022	coro = SvSTATE (coro_sv);
		1023
		1024	if (coro->flags & CF_READY)
		1025	return 0;
		1026
		1027	coro->flags |= CF_READY;
925		1028
926	LOCK;	1029	LOCK;
927	coro_enq (SvREFCNT_inc (coro));	1030	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1031	++coro_nready;
928	UNLOCK;	1032	UNLOCK;
929	}
930		1033
		1034	return 1;
		1035	}
		1036
931	static void	1037	static int
		1038	api_is_ready (SV *coro_sv)
		1039	{
		1040	dTHX;
		1041	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1042	}
		1043
		1044	static void
932	prepare_schedule (struct transfer_args *ta)	1045	prepare_schedule (pTHX_ struct transfer_args *ta)
933	{	1046	{
934	SV *current, *prev, *next;	1047	SV *prev_sv, *next_sv;
935
936	current = GvSV (coro_current);
937		1048
938	for (;;)	1049	for (;;)
939	{	1050	{
940	LOCK;	1051	LOCK;
941	next = coro_deq (PRIO_MIN);	1052	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1053
		1054	/* nothing to schedule: call the idle handler */
		1055	if (!next_sv)
		1056	{
		1057	dSP;
		1058	UNLOCK;
		1059
		1060	ENTER;
		1061	SAVETMPS;
		1062
		1063	PUSHMARK (SP);
		1064	PUTBACK;
		1065	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1066
		1067	FREETMPS;
		1068	LEAVE;
		1069	continue;
		1070	}
		1071
		1072	ta->next = SvSTATE (next_sv);
		1073
		1074	/* cannot transfer to destroyed coros, skip and look for next */
		1075	if (ta->next->flags & CF_DESTROYED)
		1076	{
		1077	UNLOCK;
		1078	SvREFCNT_dec (next_sv);
		1079	/* coro_nready is already taken care of by destroy */
		1080	continue;
		1081	}
		1082
		1083	--coro_nready;
942	UNLOCK;	1084	UNLOCK;
943
944	if (next)
945	break;	1085	break;
946
947	{
948	dSP;
949
950	ENTER;
951	SAVETMPS;
952
953	PUSHMARK (SP);
954	PUTBACK;
955	call_sv (GvSV (coro_idle), G_DISCARD);
956
957	FREETMPS;
958	LEAVE;
959	}	1086	}
960	}
961
962	prev = SvRV (current);
963	SvRV (current) = next;
964		1087
965	/* free this only after the transfer */	1088	/* free this only after the transfer */
		1089	prev_sv = SvRV (coro_current);
		1090	SvRV_set (coro_current, next_sv);
		1091	ta->prev = SvSTATE (prev_sv);
		1092
		1093	assert (ta->next->flags & CF_READY);
		1094	ta->next->flags &= ~CF_READY;
		1095
966	LOCK;	1096	LOCK;
967	free_coro_mortal ();	1097	free_coro_mortal (aTHX);
		1098	coro_mortal = prev_sv;
968	UNLOCK;	1099	UNLOCK;
969	coro_mortal = prev;
970
971	ta->prev = SvSTATE (prev);
972	ta->next = SvSTATE (next);
973	ta->flags = TRANSFER_SAVE_ALL;
974	}	1100	}
975		1101
976	static void	1102	static void
977	prepare_cede (struct transfer_args *ta)	1103	prepare_cede (pTHX_ struct transfer_args *ta)
978	{	1104	{
979	LOCK;	1105	api_ready (coro_current);
980	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
981	UNLOCK;
982
983	prepare_schedule (ta);	1106	prepare_schedule (aTHX_ ta);
		1107	}
		1108
		1109	static int
		1110	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1111	{
		1112	if (coro_nready)
		1113	{
		1114	SV *prev = SvRV (coro_current);
		1115	prepare_schedule (aTHX_ ta);
		1116	api_ready (prev);
		1117	return 1;
		1118	}
		1119	else
		1120	return 0;
984	}	1121	}
985		1122
986	static void	1123	static void
987	api_schedule (void)	1124	api_schedule (void)
988	{	1125	{
989	dTHX;	1126	dTHX;
990	struct transfer_args ta;	1127	struct transfer_args ta;
991		1128
992	prepare_schedule (&ta);	1129	prepare_schedule (aTHX_ &ta);
993	TRANSFER (ta);	1130	TRANSFER (ta);
994	}	1131	}
995		1132
996	static void	1133	static int
997	api_cede (void)	1134	api_cede (void)
998	{	1135	{
999	dTHX;	1136	dTHX;
1000	struct transfer_args ta;	1137	struct transfer_args ta;
1001		1138
1002	prepare_cede (&ta);	1139	prepare_cede (aTHX_ &ta);
		1140
		1141	if (ta.prev != ta.next)
		1142	{
1003	TRANSFER (ta);	1143	TRANSFER (ta);
		1144	return 1;
		1145	}
		1146	else
		1147	return 0;
		1148	}
		1149
		1150	static int
		1151	api_cede_notself (void)
		1152	{
		1153	dTHX;
		1154	struct transfer_args ta;
		1155
		1156	if (prepare_cede_notself (aTHX_ &ta))
		1157	{
		1158	TRANSFER (ta);
		1159	return 1;
		1160	}
		1161	else
		1162	return 0;
1004	}	1163	}
1005		1164
1006	MODULE = Coro::State PACKAGE = Coro::State	1165	MODULE = Coro::State PACKAGE = Coro::State
1007		1166
1008	PROTOTYPES: DISABLE	1167	PROTOTYPES: DISABLE
…		…
1014	#endif	1173	#endif
1015	BOOT_PAGESIZE;	1174	BOOT_PAGESIZE;
1016		1175
1017	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1176	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1018		1177
1019	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1178	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1020	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1179	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1021	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1180	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1181	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1182	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1183	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1184	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1022		1185
1023	main_mainstack = PL_mainstack;	1186	main_mainstack = PL_mainstack;
		1187	main_top_env = PL_top_env;
		1188
		1189	while (main_top_env->je_prev)
		1190	main_top_env = main_top_env->je_prev;
1024		1191
1025	coroapi.ver = CORO_API_VERSION;	1192	coroapi.ver = CORO_API_VERSION;
1026	coroapi.transfer = api_transfer;	1193	coroapi.transfer = api_transfer;
1027		1194
1028	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1195	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1036	HV *hv;	1203	HV *hv;
1037	int i;	1204	int i;
1038		1205
1039	Newz (0, coro, 1, struct coro);	1206	Newz (0, coro, 1, struct coro);
1040	coro->args = newAV ();	1207	coro->args = newAV ();
		1208	coro->save = CORO_SAVE_DEF;
		1209	coro->flags = CF_NEW;
1041		1210
1042	hv = newHV ();	1211	hv = newHV ();
1043	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1212	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1044	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1213	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1045		1214
1046	for (i = 1; i < items; i++)	1215	for (i = 1; i < items; i++)
1047	av_push (coro->args, newSVsv (ST (i)));	1216	av_push (coro->args, newSVsv (ST (i)));
1048
1049	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1050	/*coro->stack = 0;*/
1051	}	1217	}
1052	OUTPUT:	1218	OUTPUT:
		1219	RETVAL
		1220
		1221	int
		1222	save (SV *coro, int new_save = -1)
		1223	CODE:
		1224	RETVAL = api_save (coro, new_save);
		1225	OUTPUT:
		1226	RETVAL
		1227
		1228	int
		1229	save_also (SV *coro_sv, int save_also)
		1230	CODE:
		1231	{
		1232	struct coro *coro = SvSTATE (coro_sv);
		1233	RETVAL = coro->save;
		1234	coro->save |= save_also;
		1235	}
		1236	OUTPUT:
1053	RETVAL	1237	RETVAL
1054		1238
1055	void	1239	void
1056	_set_stacklevel (...)	1240	_set_stacklevel (...)
1057	ALIAS:	1241	ALIAS:
1058	Coro::State::transfer = 1	1242	Coro::State::transfer = 1
1059	Coro::schedule = 2	1243	Coro::schedule = 2
1060	Coro::cede = 3	1244	Coro::cede = 3
1061	Coro::Cont::yield = 4	1245	Coro::cede_notself = 4
1062	CODE:	1246	CODE:
1063	{	1247	{
1064	struct transfer_args ta;	1248	struct transfer_args ta;
1065		1249
1066	switch (ix)	1250	switch (ix)
1067	{	1251	{
1068	case 0:	1252	case 0:
1069	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1253	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1070	ta.next = 0;	1254	ta.next = 0;
1071	ta.flags = TRANSFER_SET_STACKLEVEL;
1072	break;	1255	break;
1073		1256
1074	case 1:	1257	case 1:
1075	if (items != 3)	1258	if (items != 2)
1076	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1259	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1077		1260
1078	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1261	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1079	break;	1262	break;
1080		1263
1081	case 2:	1264	case 2:
1082	prepare_schedule (&ta);	1265	prepare_schedule (aTHX_ &ta);
1083	break;	1266	break;
1084		1267
1085	case 3:	1268	case 3:
1086	prepare_cede (&ta);	1269	prepare_cede (aTHX_ &ta);
1087	break;	1270	break;
1088		1271
1089	case 4:	1272	case 4:
1090	{	1273	if (!prepare_cede_notself (aTHX_ &ta))
1091	SV *yieldstack;	1274	XSRETURN_EMPTY;
1092	SV *sv;
1093	AV *defav = GvAV (PL_defgv);
1094		1275
1095	yieldstack = *hv_fetch (
1096	(HV *)SvRV (GvSV (coro_current)),
1097	"yieldstack", sizeof ("yieldstack") - 1,
1098	0
1099	);
1100
1101	/* set up @_ -- ugly */
1102	av_clear (defav);
1103	av_fill (defav, items - 1);
1104	while (items--)
1105	av_store (defav, items, SvREFCNT_inc (ST(items)));
1106
1107	sv = av_pop ((AV *)SvRV (yieldstack));
1108	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1109	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1110	ta.flags = 0;
1111	SvREFCNT_dec (sv);
1112	}
1113	break;	1276	break;
1114
1115	}	1277	}
1116		1278
		1279	BARRIER;
1117	TRANSFER (ta);	1280	TRANSFER (ta);
1118	}
1119		1281
1120	void	1282	if (GIMME_V != G_VOID && ta.next != ta.prev)
1121	_clone_state_from (SV *dst, SV *src)	1283	XSRETURN_YES;
		1284	}
		1285
		1286	bool
		1287	_destroy (SV *coro_sv)
1122	CODE:	1288	CODE:
1123	{	1289	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1124	struct coro *coro_src = SvSTATE (src);	1290	OUTPUT:
1125		1291	RETVAL
1126	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1127
1128	++coro_src->refcnt;
1129	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1130	}
1131		1292
1132	void	1293	void
1133	_exit (code)	1294	_exit (code)
1134	int code	1295	int code
1135	PROTOTYPE: $	1296	PROTOTYPE: $
1136	CODE:	1297	CODE:
1137	_exit (code);	1298	_exit (code);
1138		1299
		1300	int
		1301	cctx_stacksize (int new_stacksize = 0)
		1302	CODE:
		1303	RETVAL = coro_stacksize;
		1304	if (new_stacksize)
		1305	coro_stacksize = new_stacksize;
		1306	OUTPUT:
		1307	RETVAL
		1308
		1309	int
		1310	cctx_count ()
		1311	CODE:
		1312	RETVAL = cctx_count;
		1313	OUTPUT:
		1314	RETVAL
		1315
		1316	int
		1317	cctx_idle ()
		1318	CODE:
		1319	RETVAL = cctx_idle;
		1320	OUTPUT:
		1321	RETVAL
		1322
1139	MODULE = Coro::State PACKAGE = Coro	1323	MODULE = Coro::State PACKAGE = Coro
1140		1324
1141	BOOT:	1325	BOOT:
1142	{	1326	{
1143	int i;	1327	int i;
…		…
1149	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1333	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1150	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1334	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1151	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1335	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1152	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1336	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1153		1337
1154	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1338	coro_current = get_sv ("Coro::current", FALSE);
1155	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1339	SvREADONLY_on (coro_current);
1156		1340
1157	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1341	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1158	coro_ready[i] = newAV ();	1342	coro_ready[i] = newAV ();
1159		1343
1160	{	1344	{
1161	SV *sv = perl_get_sv("Coro::API", 1);	1345	SV *sv = perl_get_sv("Coro::API", 1);
1162		1346
1163	coroapi.schedule = api_schedule;	1347	coroapi.schedule = api_schedule;
		1348	coroapi.save = api_save;
1164	coroapi.cede = api_cede;	1349	coroapi.cede = api_cede;
		1350	coroapi.cede_notself = api_cede_notself;
1165	coroapi.ready = api_ready;	1351	coroapi.ready = api_ready;
		1352	coroapi.is_ready = api_is_ready;
1166	coroapi.nready = &coro_nready;	1353	coroapi.nready = &coro_nready;
1167	coroapi.current = coro_current;	1354	coroapi.current = coro_current;
1168		1355
1169	GCoroAPI = &coroapi;	1356	GCoroAPI = &coroapi;
1170	sv_setiv (sv, (IV)&coroapi);	1357	sv_setiv (sv, (IV)&coroapi);
1171	SvREADONLY_on (sv);	1358	SvREADONLY_on (sv);
1172	}	1359	}
1173	}	1360	}
		1361
		1362	void
		1363	_set_current (SV *current)
		1364	PROTOTYPE: $
		1365	CODE:
		1366	SvREFCNT_dec (SvRV (coro_current));
		1367	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1174		1368
1175	int	1369	int
1176	prio (Coro::State coro, int newprio = 0)	1370	prio (Coro::State coro, int newprio = 0)
1177	ALIAS:	1371	ALIAS:
1178	nice = 1	1372	nice = 1
…		…
1181	RETVAL = coro->prio;	1375	RETVAL = coro->prio;
1182		1376
1183	if (items > 1)	1377	if (items > 1)
1184	{	1378	{
1185	if (ix)	1379	if (ix)
1186	newprio += coro->prio;	1380	newprio = coro->prio - newprio;
1187		1381
1188	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1382	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1189	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1383	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1190		1384
1191	coro->prio = newprio;	1385	coro->prio = newprio;
1192	}	1386	}
1193	}	1387	}
		1388	OUTPUT:
		1389	RETVAL
1194		1390
1195	void	1391	SV *
1196	ready (SV *self)	1392	ready (SV *self)
1197	PROTOTYPE: $	1393	PROTOTYPE: $
1198	CODE:	1394	CODE:
1199	api_ready (self);	1395	RETVAL = boolSV (api_ready (self));
		1396	OUTPUT:
		1397	RETVAL
		1398
		1399	SV *
		1400	is_ready (SV *self)
		1401	PROTOTYPE: $
		1402	CODE:
		1403	RETVAL = boolSV (api_is_ready (self));
		1404	OUTPUT:
		1405	RETVAL
1200		1406
1201	int	1407	int
1202	nready (...)	1408	nready (...)
1203	PROTOTYPE:	1409	PROTOTYPE:
1204	CODE:	1410	CODE:
…		…
1210		1416
1211	SV *	1417	SV *
1212	_get_state ()	1418	_get_state ()
1213	CODE:	1419	CODE:
1214	{	1420	{
1215	struct {	1421	struct io_state *data;
1216	int errorno;
1217	int laststype;
1218	int laststatval;
1219	Stat_t statcache;
1220	} data;
1221		1422
		1423	RETVAL = newSV (sizeof (struct io_state));
		1424	data = (struct io_state *)SvPVX (RETVAL);
		1425	SvCUR_set (RETVAL, sizeof (struct io_state));
		1426	SvPOK_only (RETVAL);
		1427
1222	data.errorno = errno;	1428	data->errorno = errno;
1223	data.laststype = PL_laststype;	1429	data->laststype = PL_laststype;
1224	data.laststatval = PL_laststatval;	1430	data->laststatval = PL_laststatval;
1225	data.statcache = PL_statcache;	1431	data->statcache = PL_statcache;
1226
1227	RETVAL = newSVpvn ((char *)&data, sizeof data);
1228	}	1432	}
1229	OUTPUT:	1433	OUTPUT:
1230	RETVAL	1434	RETVAL
1231		1435
1232	void	1436	void
1233	_set_state (char *data_)	1437	_set_state (char *data_)
1234	PROTOTYPE: $	1438	PROTOTYPE: $
1235	CODE:	1439	CODE:
1236	{	1440	{
1237	struct {	1441	struct io_state *data = (void *)data_;
1238	int errorno;
1239	int laststype;
1240	int laststatval;
1241	Stat_t statcache;
1242	} *data = (void *)data_;
1243		1442
1244	errno = data->errorno;	1443	errno = data->errorno;
1245	PL_laststype = data->laststype;	1444	PL_laststype = data->laststype;
1246	PL_laststatval = data->laststatval;	1445	PL_laststatval = data->laststatval;
1247	PL_statcache = data->statcache;	1446	PL_statcache = data->statcache;
1248	}	1447	}
		1448

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