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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.106 by root, Mon Nov 27 02:08:55 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"
8		10
9	#if USE_VALGRIND
10	# include <valgrind/valgrind.h>
11	#endif
12
13	#define PERL_VERSION_ATLEAST(a,b,c) \
14	(PERL_REVISION > (a) \
15	|| (PERL_REVISION == (a) \
16	&& (PERL_VERSION > (b) \
17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
18
19	#if !PERL_VERSION_ATLEAST (5,6,0)
20	# ifndef PL_ppaddr
21	# define PL_ppaddr ppaddr
22	# endif
23	# ifndef call_sv
24	# define call_sv perl_call_sv
25	# endif
26	# ifndef get_sv
27	# define get_sv perl_get_sv
28	# endif
29	# ifndef get_cv
30	# define get_cv perl_get_cv
31	# endif
32	# ifndef IS_PADGV
33	# define IS_PADGV(v) 0
34	# endif
35	# ifndef IS_PADCONST
36	# define IS_PADCONST(v) 0
37	# endif
38	#endif
39
40	#include <stdio.h>	11	#include <stdio.h>
41	#include <errno.h>	12	#include <errno.h>
42		13	#include <assert.h>
43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
44	# undef STACKGUARD
45	#endif
46
47	#ifndef STACKGUARD
48	# define STACKGUARD 0
49	#endif
50		14
51	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
52	# include <unistd.h>	16	# include <unistd.h>
53	# include <sys/mman.h>	17	# include <sys/mman.h>
54	# ifndef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
…		…
69	#else	33	#else
70	# define PAGESIZE 0	34	# define PAGESIZE 0
71	# define BOOT_PAGESIZE (void)0	35	# define BOOT_PAGESIZE (void)0
72	#endif	36	#endif
73		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
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
		55	# ifndef PL_ppaddr
		56	# define PL_ppaddr ppaddr
		57	# endif
		58	# ifndef call_sv
		59	# define call_sv perl_call_sv
		60	# endif
		61	# ifndef get_sv
		62	# define get_sv perl_get_sv
		63	# endif
		64	# ifndef get_cv
		65	# define get_cv perl_get_cv
		66	# endif
		67	# ifndef IS_PADGV
		68	# define IS_PADGV(v) 0
		69	# endif
		70	# ifndef IS_PADCONST
		71	# define IS_PADCONST(v) 0
		72	# endif
		73	#endif
		74
		75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		81	# undef CORO_STACKGUARD
		82	#endif
		83
		84	#ifndef CORO_STACKGUARD
		85	# define CORO_STACKGUARD 0
		86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
74	/* 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
75	* 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
76	* and should be unique. */	95	* and should be unique. */
77	#define dSTACKLEVEL int stacklevel	96	#define dSTACKLEVEL int stacklevel
78	#define STACKLEVEL ((void *)&stacklevel)	97	#define STACKLEVEL ((void *)&stacklevel)
79		98
80	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
81		100
82	#if __GNUC__ >= 3	101	#if __GNUC__ >= 3
83	# define attribute(x) __attribute__(x)	102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
84	#else	104	#else
85	# define attribute(x)	105	# define attribute(x)
		106	# define BARRIER
86	#endif	107	#endif
87		108
88	#define NOINLINE attribute ((noinline))	109	#define NOINLINE attribute ((noinline))
89		110
90	#include "CoroAPI.h"	111	#include "CoroAPI.h"
91
92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
93		112
94	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
95	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
98	#else	117	#else
99	# define LOCK (void)0	118	# define LOCK (void)0
100	# define UNLOCK (void)0	119	# define UNLOCK (void)0
101	#endif	120	#endif
102		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;
103	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
104	static AV *main_mainstack; /* used to differentiate between $main and others */	133	static AV *main_mainstack; /* used to differentiate between $main and others */
105	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
106	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
107		136
		137	static struct coro_cctx *cctx_first;
		138	static int cctx_count, cctx_idle;
		139
108	/* this is a structure representing a c-level coroutine */	140	/* this is a structure representing a c-level coroutine */
109	typedef struct coro_cctx {	141	typedef struct coro_cctx {
110	struct coro_cctx *next;	142	struct coro_cctx *next;
111		143
112	/* the stack */	144	/* the stack */
113	void *sptr;	145	void *sptr;
114	long ssize; /* positive == mmap, otherwise malloc */	146	size_t ssize;
115		147
116	/* cpu state */	148	/* cpu state */
117	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 */
118	JMPENV *top_env;	151	JMPENV *top_env;
119	coro_context cctx;	152	coro_context cctx;
120		153
121	#if USE_VALGRIND	154	#if CORO_USE_VALGRIND
122	int valgrind_id;	155	int valgrind_id;
123	#endif	156	#endif
		157	char inuse, mapped;
124	} coro_cctx;	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	};
125		166
126	/* this is a structure representing a perl-level coroutine */	167	/* this is a structure representing a perl-level coroutine */
127	struct coro {	168	struct coro {
128	/* the c coroutine allocated to this perl coroutine, if any */	169	/* the c coroutine allocated to this perl coroutine, if any */
129	coro_cctx *cctx;	170	coro_cctx *cctx;
130		171
131	/* data associated with this coroutine (initial args) */	172	/* data associated with this coroutine (initial args) */
132	AV *args;	173	AV *args;
133	int refcnt;	174	int refcnt;
		175	int save; /* CORO_SAVE flags */
		176	int flags; /* CF_ flags */
134		177
135	/* optionally saved, might be zero */	178	/* optionally saved, might be zero */
136	AV *defav;	179	AV *defav; /* @_ */
137	SV *defsv;	180	SV *defsv; /* $_ */
138	SV *errsv;	181	SV *errsv; /* $@ */
		182	SV *irssv; /* $/ */
		183	SV *irssv_sv; /* real $/ cache */
139		184
140	/* saved global state not related to stacks */	185	#define VAR(name,type) type name;
141	U8 dowarn;	186	# include "state.h"
142	I32 in_eval;	187	#undef VAR
143
144	/* the stacks and related info (callchain etc..) */
145	PERL_SI *curstackinfo;
146	AV *curstack;
147	AV *mainstack;
148	SV **stack_sp;
149	OP *op;
150	SV **curpad;
151	AV *comppad;
152	CV *compcv;
153	SV **stack_base;
154	SV **stack_max;
155	SV **tmps_stack;
156	I32 tmps_floor;
157	I32 tmps_ix;
158	I32 tmps_max;
159	I32 *markstack;
160	I32 *markstack_ptr;
161	I32 *markstack_max;
162	I32 *scopestack;
163	I32 scopestack_ix;
164	I32 scopestack_max;
165	ANY *savestack;
166	I32 savestack_ix;
167	I32 savestack_max;
168	OP **retstack;
169	I32 retstack_ix;
170	I32 retstack_max;
171	PMOP *curpm;
172	COP *curcop;
173		188
174	/* coro process data */	189	/* coro process data */
175	int prio;	190	int prio;
176	};	191	};
177		192
178	typedef struct coro *Coro__State;	193	typedef struct coro *Coro__State;
179	typedef struct coro *Coro__State_or_hashref;	194	typedef struct coro *Coro__State_or_hashref;
180		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
181	static AV *	212	static AV *
182	coro_clone_padlist (CV *cv)	213	coro_clone_padlist (pTHX_ CV *cv)
183	{	214	{
184	AV *padlist = CvPADLIST (cv);	215	AV *padlist = CvPADLIST (cv);
185	AV *newpadlist, *newpad;	216	AV *newpadlist, *newpad;
186		217
187	newpadlist = newAV ();	218	newpadlist = newAV ();
…		…
199		230
200	return newpadlist;	231	return newpadlist;
201	}	232	}
202		233
203	static void	234	static void
204	free_padlist (AV *padlist)	235	free_padlist (pTHX_ AV *padlist)
205	{	236	{
206	/* may be during global destruction */	237	/* may be during global destruction */
207	if (SvREFCNT (padlist))	238	if (SvREFCNT (padlist))
208	{	239	{
209	I32 i = AvFILLp (padlist);	240	I32 i = AvFILLp (padlist);
…		…
230	AV *padlist;	261	AV *padlist;
231	AV *av = (AV *)mg->mg_obj;	262	AV *av = (AV *)mg->mg_obj;
232		263
233	/* casting is fun. */	264	/* casting is fun. */
234	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	265	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
235	free_padlist (padlist);	266	free_padlist (aTHX_ padlist);
236		267
237	SvREFCNT_dec (av);	268	SvREFCNT_dec (av);
238		269
239	return 0;	270	return 0;
240	}	271	}
241		272
242	#define PERL_MAGIC_coro PERL_MAGIC_ext	273	#define PERL_MAGIC_coro PERL_MAGIC_ext
243		274
244	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	275	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
245		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
246	/* the next two functions merely cache the padlists */	284	/* the next two functions merely cache the padlists */
247	static void	285	static void
248	get_padlist (CV *cv)	286	get_padlist (pTHX_ CV *cv)
249	{	287	{
250	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	288	MAGIC *mg = CORO_MAGIC (cv);
		289	AV *av;
251		290
252	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	291	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
253	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	292	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
254	else	293	else
255	{	294	{
256	#if 0	295	#if CORO_PREFER_PERL_FUNCTIONS
257	/* this is probably cleaner, but also slower? */	296	/* this is probably cleaner, but also slower? */
258	CV *cp = Perl_cv_clone (cv);	297	CV *cp = Perl_cv_clone (cv);
259	CvPADLIST (cv) = CvPADLIST (cp);	298	CvPADLIST (cv) = CvPADLIST (cp);
260	CvPADLIST (cp) = 0;	299	CvPADLIST (cp) = 0;
261	SvREFCNT_dec (cp);	300	SvREFCNT_dec (cp);
262	#else	301	#else
263	CvPADLIST (cv) = coro_clone_padlist (cv);	302	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
264	#endif	303	#endif
265	}	304	}
266	}	305	}
267		306
268	static void	307	static void
269	put_padlist (CV *cv)	308	put_padlist (pTHX_ CV *cv)
270	{	309	{
271	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	310	MAGIC *mg = CORO_MAGIC (cv);
		311	AV *av;
272		312
273	if (!mg)	313	if (!mg)
274	{	314	{
275	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	315	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
276	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	316	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
277	mg->mg_virtual = &vtbl_coro;	317	mg->mg_virtual = &vtbl_coro;
278	mg->mg_obj = (SV *)newAV ();	318	mg->mg_obj = (SV *)newAV ();
279	}	319	}
280		320
281	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);
282	}	327	}
		328
		329	/** load & save, init *******************************************************/
283		330
284	#define SB do {	331	#define SB do {
285	#define SE } while (0)	332	#define SE } while (0)
286		333
287	#define LOAD(state) load_state((state));
288	#define SAVE(state,flags) save_state((state),(flags));
289
290	#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
291		335
292	static void	336	static void
293	load_state(Coro__State c)	337	load_perl (pTHX_ Coro__State c)
294	{	338	{
295	PL_dowarn = c->dowarn;	339	#define VAR(name,type) PL_ ## name = c->name;
296	PL_in_eval = c->in_eval;	340	# include "state.h"
297		341	#undef VAR
298	PL_curstackinfo = c->curstackinfo;
299	PL_curstack = c->curstack;
300	PL_mainstack = c->mainstack;
301	PL_stack_sp = c->stack_sp;
302	PL_op = c->op;
303	PL_curpad = c->curpad;
304	PL_comppad = c->comppad;
305	PL_compcv = c->compcv;
306	PL_stack_base = c->stack_base;
307	PL_stack_max = c->stack_max;
308	PL_tmps_stack = c->tmps_stack;
309	PL_tmps_floor = c->tmps_floor;
310	PL_tmps_ix = c->tmps_ix;
311	PL_tmps_max = c->tmps_max;
312	PL_markstack = c->markstack;
313	PL_markstack_ptr = c->markstack_ptr;
314	PL_markstack_max = c->markstack_max;
315	PL_scopestack = c->scopestack;
316	PL_scopestack_ix = c->scopestack_ix;
317	PL_scopestack_max = c->scopestack_max;
318	PL_savestack = c->savestack;
319	PL_savestack_ix = c->savestack_ix;
320	PL_savestack_max = c->savestack_max;
321	#if !PERL_VERSION_ATLEAST (5,9,0)
322	PL_retstack = c->retstack;
323	PL_retstack_ix = c->retstack_ix;
324	PL_retstack_max = c->retstack_max;
325	#endif
326	PL_curpm = c->curpm;
327	PL_curcop = c->curcop;
328		342
329	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	343	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
330	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	344	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
331	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	}
332		357
333	{	358	{
334	dSP;	359	dSP;
335	CV *cv;	360	CV *cv;
336		361
337	/* now do the ugly restore mess */	362	/* now do the ugly restore mess */
338	while ((cv = (CV *)POPs))	363	while ((cv = (CV *)POPs))
339	{	364	{
340	AV *padlist = (AV *)POPs;
341
342	if (padlist)
343	{
344	put_padlist (cv); /* mark this padlist as available */	365	put_padlist (aTHX_ cv); /* mark this padlist as available */
345	CvPADLIST(cv) = padlist;	366	CvDEPTH (cv) = PTR2IV (POPs);
346	}	367	CvPADLIST (cv) = (AV *)POPs;
347
348	++CvDEPTH(cv);
349	}	368	}
350		369
351	PUTBACK;	370	PUTBACK;
352	}	371	}
		372	assert (!PL_comppad || AvARRAY (PL_comppad));//D
353	}	373	}
354		374
355	static void	375	static void
356	save_state(Coro__State c, int flags)	376	save_perl (pTHX_ Coro__State c)
357	{	377	{
		378	assert (!PL_comppad || AvARRAY (PL_comppad));//D
358	{	379	{
359	dSP;	380	dSP;
360	I32 cxix = cxstack_ix;	381	I32 cxix = cxstack_ix;
361	PERL_CONTEXT *ccstk = cxstack;	382	PERL_CONTEXT *ccstk = cxstack;
362	PERL_SI *top_si = PL_curstackinfo;	383	PERL_SI *top_si = PL_curstackinfo;
…		…
364	/*	385	/*
365	* 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
366	* (and reinitialize) all cv's in the whole callchain :(	387	* (and reinitialize) all cv's in the whole callchain :(
367	*/	388	*/
368		389
		390	EXTEND (SP, 3 + 1);
369	PUSHs (Nullsv);	391	PUSHs (Nullsv);
370	/* this loop was inspired by pp_caller */	392	/* this loop was inspired by pp_caller */
371	for (;;)	393	for (;;)
372	{	394	{
373	while (cxix >= 0)	395	while (cxix >= 0)
374	{	396	{
375	PERL_CONTEXT *cx = &ccstk[cxix--];	397	PERL_CONTEXT *cx = &ccstk[cxix--];
376		398
377	if (CxTYPE(cx) == CXt_SUB)	399	if (CxTYPE (cx) == CXt_SUB)
378	{	400	{
379	CV *cv = cx->blk_sub.cv;	401	CV *cv = cx->blk_sub.cv;
		402
380	if (CvDEPTH(cv))	403	if (CvDEPTH (cv))
381	{	404	{
382	EXTEND (SP, CvDEPTH(cv)*2);	405	EXTEND (SP, 3);
383
384	while (--CvDEPTH(cv))
385	{
386	/* this tells the restore code to increment CvDEPTH */
387	PUSHs (Nullsv);
388	PUSHs ((SV *)cv);
389	}
390
391	PUSHs ((SV *)CvPADLIST(cv));	406	PUSHs ((SV *)CvPADLIST (cv));
		407	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
392	PUSHs ((SV *)cv);	408	PUSHs ((SV *)cv);
393		409
		410	CvDEPTH (cv) = 0;
394	get_padlist (cv);	411	get_padlist (aTHX_ cv);
395	}	412	}
396	}	413	}
397	#ifdef CXt_FORMAT
398	else if (CxTYPE(cx) == CXt_FORMAT)
399	{
400	/* I never used formats, so how should I know how these are implemented? */
401	/* my bold guess is as a simple, plain sub... */
402	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
403	}
404	#endif
405	}	414	}
406		415
407	if (top_si->si_type == PERLSI_MAIN)	416	if (top_si->si_type == PERLSI_MAIN)
408	break;	417	break;
409		418
…		…
413	}	422	}
414		423
415	PUTBACK;	424	PUTBACK;
416	}	425	}
417		426
418	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;
419	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	428	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
420	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;
421		431
422	c->dowarn = PL_dowarn;	432	#define VAR(name,type)c->name = PL_ ## name;
423	c->in_eval = PL_in_eval;	433	# include "state.h"
424		434	#undef VAR
425	c->curstackinfo = PL_curstackinfo;
426	c->curstack = PL_curstack;
427	c->mainstack = PL_mainstack;
428	c->stack_sp = PL_stack_sp;
429	c->op = PL_op;
430	c->curpad = PL_curpad;
431	c->comppad = PL_comppad;
432	c->compcv = PL_compcv;
433	c->stack_base = PL_stack_base;
434	c->stack_max = PL_stack_max;
435	c->tmps_stack = PL_tmps_stack;
436	c->tmps_floor = PL_tmps_floor;
437	c->tmps_ix = PL_tmps_ix;
438	c->tmps_max = PL_tmps_max;
439	c->markstack = PL_markstack;
440	c->markstack_ptr = PL_markstack_ptr;
441	c->markstack_max = PL_markstack_max;
442	c->scopestack = PL_scopestack;
443	c->scopestack_ix = PL_scopestack_ix;
444	c->scopestack_max = PL_scopestack_max;
445	c->savestack = PL_savestack;
446	c->savestack_ix = PL_savestack_ix;
447	c->savestack_max = PL_savestack_max;
448	#if !PERL_VERSION_ATLEAST (5,9,0)
449	c->retstack = PL_retstack;
450	c->retstack_ix = PL_retstack_ix;
451	c->retstack_max = PL_retstack_max;
452	#endif
453	c->curpm = PL_curpm;
454	c->curcop = PL_curcop;
455	}	435	}
456		436
457	/*	437	/*
458	* allocate various perl stacks. This is an exact copy	438	* allocate various perl stacks. This is an exact copy
459	* of perl.c:init_stacks, except that it uses less memory	439	* of perl.c:init_stacks, except that it uses less memory
460	* on the (sometimes correct) assumption that coroutines do	440	* on the (sometimes correct) assumption that coroutines do
461	* not usually need a lot of stackspace.	441	* not usually need a lot of stackspace.
462	*/	442	*/
		443	#if CORO_PREFER_PERL_FUNCTIONS
		444	# define coro_init_stacks init_stacks
		445	#else
463	static void	446	static void
464	coro_init_stacks ()	447	coro_init_stacks (pTHX)
465	{	448	{
466	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	449	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
467	PL_curstackinfo->si_type = PERLSI_MAIN;	450	PL_curstackinfo->si_type = PERLSI_MAIN;
468	PL_curstack = PL_curstackinfo->si_stack;	451	PL_curstack = PL_curstackinfo->si_stack;
469	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
470		453
471	PL_stack_base = AvARRAY(PL_curstack);	454	PL_stack_base = AvARRAY(PL_curstack);
472	PL_stack_sp = PL_stack_base;	455	PL_stack_sp = PL_stack_base;
473	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
474		457
475	New(50,PL_tmps_stack,96,SV*);	458	New(50,PL_tmps_stack,128,SV*);
476	PL_tmps_floor = -1;	459	PL_tmps_floor = -1;
477	PL_tmps_ix = -1;	460	PL_tmps_ix = -1;
478	PL_tmps_max = 96;	461	PL_tmps_max = 128;
479		462
480	New(54,PL_markstack,16,I32);	463	New(54,PL_markstack,32,I32);
481	PL_markstack_ptr = PL_markstack;	464	PL_markstack_ptr = PL_markstack;
482	PL_markstack_max = PL_markstack + 16;	465	PL_markstack_max = PL_markstack + 32;
483		466
484	#ifdef SET_MARK_OFFSET	467	#ifdef SET_MARK_OFFSET
485	SET_MARK_OFFSET;	468	SET_MARK_OFFSET;
486	#endif	469	#endif
487		470
488	New(54,PL_scopestack,16,I32);	471	New(54,PL_scopestack,32,I32);
489	PL_scopestack_ix = 0;	472	PL_scopestack_ix = 0;
490	PL_scopestack_max = 16;	473	PL_scopestack_max = 32;
491		474
492	New(54,PL_savestack,96,ANY);	475	New(54,PL_savestack,64,ANY);
493	PL_savestack_ix = 0;	476	PL_savestack_ix = 0;
494	PL_savestack_max = 96;	477	PL_savestack_max = 64;
495		478
496	#if !PERL_VERSION_ATLEAST (5,9,0)	479	#if !PERL_VERSION_ATLEAST (5,9,0)
497	New(54,PL_retstack,8,OP*);	480	New(54,PL_retstack,16,OP*);
498	PL_retstack_ix = 0;	481	PL_retstack_ix = 0;
499	PL_retstack_max = 8;	482	PL_retstack_max = 16;
500	#endif	483	#endif
501	}	484	}
		485	#endif
502		486
503	/*	487	/*
504	* destroy the stacks, the callchain etc...	488	* destroy the stacks, the callchain etc...
505	*/	489	*/
506	static void	490	static void
507	coro_destroy_stacks ()	491	coro_destroy_stacks (pTHX)
508	{	492	{
509	if (!IN_DESTRUCT)	493	if (!IN_DESTRUCT)
510	{	494	{
511	/* is this ugly, I ask? */	495	/* restore all saved variables and stuff */
512	LEAVE_SCOPE (0);	496	LEAVE_SCOPE (0);
		497	assert (PL_tmps_floor == -1);
513		498
514	/* sure it is, but more important: is it correct?? :/ */	499	/* free all temporaries */
515	FREETMPS;	500	FREETMPS;
		501	assert (PL_tmps_ix == -1);
516		502
		503	/* unwind all extra stacks */
517	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	504	POPSTACK_TO (PL_mainstack);
		505
		506	/* unwind main stack */
		507	dounwind (-1);
518	}	508	}
519		509
520	while (PL_curstackinfo->si_next)	510	while (PL_curstackinfo->si_next)
521	PL_curstackinfo = PL_curstackinfo->si_next;	511	PL_curstackinfo = PL_curstackinfo->si_next;
522		512
523	while (PL_curstackinfo)	513	while (PL_curstackinfo)
524	{	514	{
525	PERL_SI *p = PL_curstackinfo->si_prev;	515	PERL_SI *p = PL_curstackinfo->si_prev;
526		516
527	{ /*D*//*remove*/
528	dSP;
529	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
530	PUTBACK; /* possibly superfluous */
531	}
532
533	if (!IN_DESTRUCT)	517	if (!IN_DESTRUCT)
534	{
535	dounwind (-1);/*D*//*remove*/
536	SvREFCNT_dec (PL_curstackinfo->si_stack);	518	SvREFCNT_dec (PL_curstackinfo->si_stack);
537	}
538		519
539	Safefree (PL_curstackinfo->si_cxstack);	520	Safefree (PL_curstackinfo->si_cxstack);
540	Safefree (PL_curstackinfo);	521	Safefree (PL_curstackinfo);
541	PL_curstackinfo = p;	522	PL_curstackinfo = p;
542	}	523	}
…		…
548	#if !PERL_VERSION_ATLEAST (5,9,0)	529	#if !PERL_VERSION_ATLEAST (5,9,0)
549	Safefree (PL_retstack);	530	Safefree (PL_retstack);
550	#endif	531	#endif
551	}	532	}
552		533
		534	/** coroutine stack handling ************************************************/
		535
553	static void	536	static void
554	setup_coro (struct coro *coro)	537	setup_coro (pTHX_ struct coro *coro)
555	{	538	{
556	/*	539	/*
557	* emulate part of the perl startup here.	540	* emulate part of the perl startup here.
558	*/	541	*/
559
560	coro_init_stacks ();	542	coro_init_stacks (aTHX);
561		543
		544	PL_curcop = &PL_compiling;
		545	PL_in_eval = EVAL_NULL;
562	PL_curcop = 0;	546	PL_comppad = 0;
563	PL_in_eval = 0;
564	PL_curpm = 0;	547	PL_curpm = 0;
		548	PL_localizing = 0;
		549	PL_dirty = 0;
		550	PL_restartop = 0;
565		551
566	{	552	{
567	dSP;	553	dSP;
568	LOGOP myop;	554	LOGOP myop;
569		555
570	/* I have no idea why this is needed, but it is */
571	PUSHMARK (SP);
572
573	SvREFCNT_dec (GvAV (PL_defgv));	556	SvREFCNT_dec (GvAV (PL_defgv));
574	GvAV (PL_defgv) = coro->args; coro->args = 0;	557	GvAV (PL_defgv) = coro->args; coro->args = 0;
575		558
576	Zero (&myop, 1, LOGOP);	559	Zero (&myop, 1, LOGOP);
577	myop.op_next = Nullop;	560	myop.op_next = Nullop;
578	myop.op_flags = OPf_WANT_VOID;	561	myop.op_flags = OPf_WANT_VOID;
579		562
		563	PUSHMARK (SP);
		564	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		565	PUTBACK;
580	PL_op = (OP *)&myop;	566	PL_op = (OP *)&myop;
581
582	PUSHMARK (SP);
583	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
584	PUTBACK;
585	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
586	SPAGAIN;	568	SPAGAIN;
587
588	ENTER; /* necessary e.g. for dounwind */
589	}	569	}
590	}
591		570
		571	ENTER; /* necessary e.g. for dounwind */
		572	}
		573
592	static void	574	static void
593	free_coro_mortal ()	575	free_coro_mortal (pTHX)
594	{	576	{
595	if (coro_mortal)	577	if (coro_mortal)
596	{	578	{
597	SvREFCNT_dec (coro_mortal);	579	SvREFCNT_dec (coro_mortal);
598	coro_mortal = 0;	580	coro_mortal = 0;
599	}	581	}
600	}	582	}
601		583
		584	/* inject a fake call to Coro::State::_cctx_init into the execution */
602	static void NOINLINE	585	static void NOINLINE
603	prepare_cctx (coro_cctx *cctx)	586	prepare_cctx (pTHX_ coro_cctx *cctx)
604	{	587	{
605	dSP;	588	dSP;
606	LOGOP myop;	589	LOGOP myop;
607		590
608	Zero (&myop, 1, LOGOP);	591	Zero (&myop, 1, LOGOP);
609	myop.op_next = PL_op;	592	myop.op_next = PL_op;
610	myop.op_flags = OPf_WANT_VOID;	593	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
611
612	sv_setiv (get_sv ("Coro::State::cctx", FALSE), PTR2IV (cctx));
613		594
614	PUSHMARK (SP);	595	PUSHMARK (SP);
		596	EXTEND (SP, 2);
		597	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
615	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	598	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
616	PUTBACK;	599	PUTBACK;
		600	PL_op = (OP *)&myop;
617	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	601	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
618	SPAGAIN;	602	SPAGAIN;
619	}	603	}
620		604
621	static void	605	static void
622	coro_run (void *arg)	606	coro_run (void *arg)
623	{	607	{
		608	dTHX;
		609
624	/* coro_run is the alternative epilogue of transfer() */	610	/* coro_run is the alternative tail of transfer(), so unlock here. */
625	UNLOCK;	611	UNLOCK;
626		612
627	/*	613	/*
628	* this is a _very_ stripped down perl interpreter ;)	614	* this is a _very_ stripped down perl interpreter ;)
629	*/	615	*/
630	PL_top_env = &PL_start_env;	616	PL_top_env = &PL_start_env;
		617
631	/* inject call to cctx_init */	618	/* inject call to cctx_init */
632	prepare_cctx ((coro_cctx *)arg);	619	prepare_cctx (aTHX_ (coro_cctx *)arg);
633		620
634	/* 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;
635	perl_run (PL_curinterp);	623	perl_run (PL_curinterp);
636		624
637	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);	625	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
638	abort ();	626	abort ();
639	}	627	}
640		628
641	static coro_cctx *	629	static coro_cctx *
642	cctx_new ()	630	cctx_new ()
643	{	631	{
644	coro_cctx *cctx;	632	coro_cctx *cctx;
		633	void *stack_start;
		634	size_t stack_size;
645		635
		636	++cctx_count;
		637
646	New (0, cctx, 1, coro_cctx);	638	Newz (0, cctx, 1, coro_cctx);
647		639
648	#if HAVE_MMAP	640	#if HAVE_MMAP
649		641
650	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	642	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
651	/* mmap suppsedly does allocate-on-write for us */	643	/* mmap supposedly does allocate-on-write for us */
652	cctx->sptr = mmap (0, cctx->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);
653		645
654	if (cctx->sptr == (void *)-1)	646	if (cctx->sptr != (void *)-1)
655	{
656	perror ("FATAL: unable to mmap stack for coroutine");
657	_exit (EXIT_FAILURE);
658	}	647	{
659
660	# if STACKGUARD	648	# if CORO_STACKGUARD
661	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	649	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
662	# endif	650	# endif
		651	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		652	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		653	cctx->mapped = 1;
		654	}
		655	else
		656	#endif
		657	{
		658	cctx->ssize = coro_stacksize * (long)sizeof (long);
		659	New (0, cctx->sptr, coro_stacksize, long);
663		660
664	#else
665
666	cctx->ssize = STACKSIZE * (long)sizeof (long);
667	New (0, cctx->sptr, STACKSIZE, long);
668
669	if (!cctx->sptr)	661	if (!cctx->sptr)
670	{	662	{
671	perror ("FATAL: unable to malloc stack for coroutine");	663	perror ("FATAL: unable to allocate stack for coroutine");
672	_exit (EXIT_FAILURE);	664	_exit (EXIT_FAILURE);
673	}	665	}
674		666
675	#endif	667	stack_start = cctx->sptr;
		668	stack_size = cctx->ssize;
		669	}
676		670
677	#if USE_VALGRIND	671	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
678	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
679	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
680	cctx->ssize + (char *)cctx->sptr
681	);
682	#endif
683
684	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);	672	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
685		673
686	return cctx;	674	return cctx;
687	}	675	}
688		676
689	static void	677	static void
690	cctx_free (coro_cctx *cctx)	678	cctx_destroy (coro_cctx *cctx)
691	{	679	{
692	if (!cctx)	680	if (!cctx)
693	return;	681	return;
694		682
		683	--cctx_count;
		684
695	#if USE_VALGRIND	685	#if CORO_USE_VALGRIND
696	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);	686	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
697	#endif	687	#endif
698		688
699	#if HAVE_MMAP	689	#if HAVE_MMAP
		690	if (cctx->mapped)
700	munmap (cctx->sptr, cctx->ssize);	691	munmap (cctx->sptr, cctx->ssize);
701	#else	692	else
		693	#endif
702	Safefree (cctx->sptr);	694	Safefree (cctx->sptr);
703	#endif
704		695
705	Safefree (cctx);	696	Safefree (cctx);
706	}	697	}
707		698
708	static coro_cctx *cctx_first;
709	static int cctx_count, cctx_idle;
710
711	static coro_cctx *	699	static coro_cctx *
712	cctx_get ()	700	cctx_get (pTHX)
713	{	701	{
714	coro_cctx *cctx;
715
716	if (cctx_first)	702	while (cctx_first)
717	{	703	{
		704	coro_cctx *cctx = cctx_first;
		705	cctx_first = cctx->next;
718	--cctx_idle;	706	--cctx_idle;
719	cctx = cctx_first;	707
720	cctx_first = cctx->next;	708	if (cctx->ssize >= coro_stacksize)
		709	return cctx;
		710
		711	cctx_destroy (cctx);
721	}	712	}
722	else	713
723	{
724	++cctx_count;
725	cctx = cctx_new ();
726	PL_op = PL_op->op_next;	714	PL_op = PL_op->op_next;
727	}
728
729	return cctx;	715	return cctx_new ();
730	}	716	}
731		717
732	static void	718	static void
733	cctx_put (coro_cctx *cctx)	719	cctx_put (coro_cctx *cctx)
734	{	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);
		730	}
		731
735	++cctx_idle;	732	++cctx_idle;
736	cctx->next = cctx_first;	733	cctx->next = cctx_first;
737	cctx_first = cctx;	734	cctx_first = cctx;
738	}	735	}
739		736
		737	/** coroutine switching *****************************************************/
		738
740	/* never call directly, always through the coro_state_transfer global variable */	739	/* never call directly, always through the coro_state_transfer global variable */
741	static void NOINLINE	740	static void NOINLINE
742	transfer (struct coro *prev, struct coro *next, int flags)	741	transfer (pTHX_ struct coro *prev, struct coro *next)
743	{	742	{
744	dSTACKLEVEL;	743	dSTACKLEVEL;
745		744
746	/* sometimes transfer is only called to set idle_sp */	745	/* sometimes transfer is only called to set idle_sp */
747	if (flags == TRANSFER_SET_STACKLEVEL)	746	if (!next)
		747	{
748	((coro_cctx *)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	}
749	else if (prev != next)	751	else if (prev != next)
750	{	752	{
751	coro_cctx *prev__cctx;	753	coro_cctx *prev__cctx;
752		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;
		776
753	LOCK;	777	LOCK;
754		778
755	if (next->mainstack)	779	if (next->flags & CF_NEW)
756	{	780	{
757	/* coroutine already started */	781	/* need to start coroutine */
758	SAVE (prev, flags);	782	next->flags &= ~CF_NEW;
759	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);
760	}	789	}
761	else	790	else
762	{	791	{
763	/* need to start coroutine */	792	/* coroutine already started */
764	/* first get rid of the old state */	793	save_perl (aTHX_ prev);
765	SAVE (prev, -1);	794	load_perl (aTHX_ next);
766	/* setup coroutine call */
767	setup_coro (next);
768	/* need a stack */
769	next->cctx = 0;
770	}	795	}
771
772	if (!prev->cctx)
773	/* create a new empty context */
774	Newz (0, prev->cctx, 1, coro_cctx);
775		796
776	prev__cctx = prev->cctx;	797	prev__cctx = prev->cctx;
777		798
778	/* possibly "free" the cctx */	799	/* possibly "free" the cctx */
779	if (prev__cctx->idle_sp == STACKLEVEL)	800	if (prev__cctx->idle_sp == STACKLEVEL)
780	{	801	{
		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
		805	prev->cctx = 0;
		806
781	cctx_put (prev__cctx);	807	cctx_put (prev__cctx);
782	prev->cctx = 0;	808	prev__cctx->inuse = 0;
783	}	809	}
784		810
785	if (!next->cctx)	811	if (!next->cctx)
		812	{
786	next->cctx = cctx_get ();	813	next->cctx = cctx_get (aTHX);
		814	assert (!next->cctx->inuse);
		815	next->cctx->inuse = 1;
		816	}
787		817
788	if (prev__cctx != next->cctx)	818	if (prev__cctx != next->cctx)
789	{	819	{
790	prev__cctx->top_env = PL_top_env;	820	prev__cctx->top_env = PL_top_env;
791	PL_top_env = next->cctx->top_env;	821	PL_top_env = next->cctx->top_env;
792	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);	822	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
793	}	823	}
794		824
795	free_coro_mortal ();	825	free_coro_mortal (aTHX);
796
797	UNLOCK;	826	UNLOCK;
798	}	827	}
799	}	828	}
800		829
801	struct transfer_args	830	struct transfer_args
802	{	831	{
803	struct coro *prev, *next;	832	struct coro *prev, *next;
804	int flags;
805	};	833	};
806		834
807	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)	835	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
808		836
		837	/** high level stuff ********************************************************/
		838
809	static void	839	static int
810	coro_state_destroy (struct coro *coro)	840	coro_state_destroy (pTHX_ struct coro *coro)
811	{	841	{
812	if (coro->refcnt--)	842	if (coro->flags & CF_DESTROYED)
813	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 */
814		857
815	if (coro->mainstack && coro->mainstack != main_mainstack)	858	if (coro->mainstack && coro->mainstack != main_mainstack)
816	{	859	{
817	struct coro temp;	860	struct coro temp;
818		861
819	SAVE ((&temp), TRANSFER_SAVE_ALL);	862	assert (!(coro->flags & CF_RUNNING));
820	LOAD (coro);
821		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
822	coro_destroy_stacks ();	873	coro_destroy_stacks (aTHX);
823		874
824	LOAD ((&temp)); /* this will get rid of defsv etc.. */	875	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
825		876
826	coro->mainstack = 0;	877	coro->mainstack = 0;
827	}	878	}
828		879
829	cctx_free (coro->cctx);	880	cctx_destroy (coro->cctx);
830	SvREFCNT_dec (coro->args);	881	SvREFCNT_dec (coro->args);
831	Safefree (coro);	882
		883	return 1;
832	}	884	}
833		885
834	static int	886	static int
835	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	887	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
836	{	888	{
837	struct coro *coro = (struct coro *)mg->mg_ptr;	889	struct coro *coro = (struct coro *)mg->mg_ptr;
838	mg->mg_ptr = 0;	890	mg->mg_ptr = 0;
839		891
		892	if (--coro->refcnt < 0)
		893	{
840	coro_state_destroy (coro);	894	coro_state_destroy (aTHX_ coro);
		895	Safefree (coro);
		896	}
841		897
842	return 0;	898	return 0;
843	}	899	}
844		900
845	static int	901	static int
…		…
852	return 0;	908	return 0;
853	}	909	}
854		910
855	static MGVTBL coro_state_vtbl = {	911	static MGVTBL coro_state_vtbl = {
856	0, 0, 0, 0,	912	0, 0, 0, 0,
857	coro_state_clear,	913	coro_state_free,
858	0,	914	0,
859	#ifdef MGf_DUP	915	#ifdef MGf_DUP
860	coro_state_dup,	916	coro_state_dup,
861	#else	917	#else
862	# define MGf_DUP 0	918	# define MGf_DUP 0
863	#endif	919	#endif
864	};	920	};
865		921
866	static struct coro *	922	static struct coro *
867	SvSTATE (SV *coro)	923	SvSTATE_ (pTHX_ SV *coro)
868	{	924	{
869	HV *stash;	925	HV *stash;
870	MAGIC *mg;	926	MAGIC *mg;
871		927
872	if (SvROK (coro))	928	if (SvROK (coro))
…		…
878	/* very slow, but rare, check */	934	/* very slow, but rare, check */
879	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	935	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
880	croak ("Coro::State object required");	936	croak ("Coro::State object required");
881	}	937	}
882		938
883	mg = SvMAGIC (coro);	939	mg = CORO_MAGIC (coro);
884	assert (mg->mg_type == PERL_MAGIC_ext);
885	return (struct coro *)mg->mg_ptr;	940	return (struct coro *)mg->mg_ptr;
886	}	941	}
887		942
		943	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		944
888	static void	945	static void
889	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)
890	{	947	{
891	ta->prev = SvSTATE (prev);	948	ta->prev = SvSTATE (prev_sv);
892	ta->next = SvSTATE (next);	949	ta->next = SvSTATE (next_sv);
893	ta->flags = flags;
894	}	950	}
895		951
896	static void	952	static void
897	api_transfer (SV *prev, SV *next, int flags)	953	api_transfer (SV *prev_sv, SV *next_sv)
898	{	954	{
899	dTHX;	955	dTHX;
900	struct transfer_args ta;	956	struct transfer_args ta;
901		957
902	prepare_transfer (&ta, prev, next, flags);	958	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
903	TRANSFER (ta);	959	TRANSFER (ta);
904	}	960	}
905		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
906	/** Coro ********************************************************************/	975	/** Coro ********************************************************************/
907		976
908	#define PRIO_MAX 3
909	#define PRIO_HIGH 1
910	#define PRIO_NORMAL 0
911	#define PRIO_LOW -1
912	#define PRIO_IDLE -3
913	#define PRIO_MIN -4
914
915	/* for Coro.pm */
916	static GV *coro_current, *coro_idle;
917	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
918	static int coro_nready;
919
920	static void	977	static void
921	coro_enq (SV *sv)	978	coro_enq (pTHX_ SV *coro_sv)
922	{	979	{
923	int prio;
924
925	if (SvTYPE (sv) != SVt_PVHV)
926	croak ("Coro::ready tried to enqueue something that is not a coroutine");
927
928	prio = SvSTATE (sv)->prio;
929
930	av_push (coro_ready [prio - PRIO_MIN], sv);	980	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
931	coro_nready++;
932	}	981	}
933		982
934	static SV *	983	static SV *
935	coro_deq (int min_prio)	984	coro_deq (pTHX_ int min_prio)
936	{	985	{
937	int prio = PRIO_MAX - PRIO_MIN;	986	int prio = PRIO_MAX - PRIO_MIN;
938		987
939	min_prio -= PRIO_MIN;	988	min_prio -= PRIO_MIN;
940	if (min_prio < 0)	989	if (min_prio < 0)
941	min_prio = 0;	990	min_prio = 0;
942		991
943	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	992	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
944	if (AvFILLp (coro_ready [prio]) >= 0)	993	if (AvFILLp (coro_ready [prio]) >= 0)
945	{
946	coro_nready--;
947	return av_shift (coro_ready [prio]);	994	return av_shift (coro_ready [prio]);
948	}
949		995
950	return 0;	996	return 0;
951	}	997	}
952		998
953	static void	999	static int
954	api_ready (SV *coro)	1000	api_ready (SV *coro_sv)
955	{	1001	{
956	dTHX;	1002	dTHX;
		1003	struct coro *coro;
957		1004
958	if (SvROK (coro))	1005	if (SvROK (coro_sv))
959	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;
960		1014
961	LOCK;	1015	LOCK;
962	coro_enq (SvREFCNT_inc (coro));	1016	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1017	++coro_nready;
963	UNLOCK;	1018	UNLOCK;
964	}
965		1019
		1020	return 1;
		1021	}
		1022
966	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
967	prepare_schedule (struct transfer_args *ta)	1031	prepare_schedule (pTHX_ struct transfer_args *ta)
968	{	1032	{
969	SV *current, *prev, *next;	1033	SV *prev_sv, *next_sv;
970
971	current = GvSV (coro_current);
972		1034
973	for (;;)	1035	for (;;)
974	{	1036	{
975	LOCK;	1037	LOCK;
976	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;
977	UNLOCK;	1070	UNLOCK;
978
979	if (next)
980	break;	1071	break;
981
982	{
983	dSP;
984
985	ENTER;
986	SAVETMPS;
987
988	PUSHMARK (SP);
989	PUTBACK;
990	call_sv (GvSV (coro_idle), G_DISCARD);
991
992	FREETMPS;
993	LEAVE;
994	}	1072	}
995	}
996
997	prev = SvRV (current);
998	SvRV (current) = next;
999		1073
1000	/* 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
1001	LOCK;	1082	LOCK;
1002	free_coro_mortal ();	1083	free_coro_mortal (aTHX);
		1084	coro_mortal = prev_sv;
1003	UNLOCK;	1085	UNLOCK;
1004	coro_mortal = prev;
1005
1006	ta->prev = SvSTATE (prev);
1007	ta->next = SvSTATE (next);
1008	ta->flags = TRANSFER_SAVE_ALL;
1009	}	1086	}
1010		1087
1011	static void	1088	static void
1012	prepare_cede (struct transfer_args *ta)	1089	prepare_cede (pTHX_ struct transfer_args *ta)
1013	{	1090	{
1014	LOCK;	1091	api_ready (coro_current);
1015	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
1016	UNLOCK;
1017
1018	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;
1019	}	1107	}
1020		1108
1021	static void	1109	static void
1022	api_schedule (void)	1110	api_schedule (void)
1023	{	1111	{
1024	dTHX;	1112	dTHX;
1025	struct transfer_args ta;	1113	struct transfer_args ta;
1026		1114
1027	prepare_schedule (&ta);	1115	prepare_schedule (aTHX_ &ta);
1028	TRANSFER (ta);	1116	TRANSFER (ta);
1029	}	1117	}
1030		1118
1031	static void	1119	static int
1032	api_cede (void)	1120	api_cede (void)
1033	{	1121	{
1034	dTHX;	1122	dTHX;
1035	struct transfer_args ta;	1123	struct transfer_args ta;
1036		1124
1037	prepare_cede (&ta);	1125	prepare_cede (aTHX_ &ta);
		1126
		1127	if (ta.prev != ta.next)
		1128	{
1038	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;
1039	}	1149	}
1040		1150
1041	MODULE = Coro::State PACKAGE = Coro::State	1151	MODULE = Coro::State PACKAGE = Coro::State
1042		1152
1043	PROTOTYPES: DISABLE	1153	PROTOTYPES: DISABLE
…		…
1049	#endif	1159	#endif
1050	BOOT_PAGESIZE;	1160	BOOT_PAGESIZE;
1051		1161
1052	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1162	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1053		1163
1054	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1164	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1055	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1165	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1056	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));
1057		1169
1058	main_mainstack = PL_mainstack;	1170	main_mainstack = PL_mainstack;
1059		1171
1060	coroapi.ver = CORO_API_VERSION;	1172	coroapi.ver = CORO_API_VERSION;
1061	coroapi.transfer = api_transfer;	1173	coroapi.transfer = api_transfer;
…		…
1071	HV *hv;	1183	HV *hv;
1072	int i;	1184	int i;
1073		1185
1074	Newz (0, coro, 1, struct coro);	1186	Newz (0, coro, 1, struct coro);
1075	coro->args = newAV ();	1187	coro->args = newAV ();
		1188	coro->save = CORO_SAVE_ALL;
		1189	coro->flags = CF_NEW;
1076		1190
1077	hv = newHV ();	1191	hv = newHV ();
1078	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;
1079	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1193	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1080		1194
1081	for (i = 1; i < items; i++)	1195	for (i = 1; i < items; i++)
1082	av_push (coro->args, newSVsv (ST (i)));	1196	av_push (coro->args, newSVsv (ST (i)));
1083	}	1197	}
1084	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:
1085	RETVAL	1206	RETVAL
1086		1207
1087	void	1208	void
1088	_set_stacklevel (...)	1209	_set_stacklevel (...)
1089	ALIAS:	1210	ALIAS:
1090	Coro::State::transfer = 1	1211	Coro::State::transfer = 1
1091	Coro::schedule = 2	1212	Coro::schedule = 2
1092	Coro::cede = 3	1213	Coro::cede = 3
1093	Coro::Cont::yield = 4	1214	Coro::cede_notself = 4
1094	CODE:	1215	CODE:
1095	{	1216	{
1096	struct transfer_args ta;	1217	struct transfer_args ta;
1097		1218
1098	switch (ix)	1219	switch (ix)
1099	{	1220	{
1100	case 0:	1221	case 0:
1101	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));	1222	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1102	ta.next = 0;	1223	ta.next = 0;
1103	ta.flags = TRANSFER_SET_STACKLEVEL;
1104	break;	1224	break;
1105		1225
1106	case 1:	1226	case 1:
1107	if (items != 3)	1227	if (items != 2)
1108	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);
1109		1229
1110	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1230	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1111	break;	1231	break;
1112		1232
1113	case 2:	1233	case 2:
1114	prepare_schedule (&ta);	1234	prepare_schedule (aTHX_ &ta);
1115	break;	1235	break;
1116		1236
1117	case 3:	1237	case 3:
1118	prepare_cede (&ta);	1238	prepare_cede (aTHX_ &ta);
1119	break;	1239	break;
1120		1240
1121	case 4:	1241	case 4:
1122	{	1242	if (!prepare_cede_notself (aTHX_ &ta))
1123	SV *yieldstack;	1243	XSRETURN_EMPTY;
1124	SV *sv;
1125	AV *defav = GvAV (PL_defgv);
1126		1244
1127	yieldstack = *hv_fetch (
1128	(HV *)SvRV (GvSV (coro_current)),
1129	"yieldstack", sizeof ("yieldstack") - 1,
1130	0
1131	);
1132
1133	/* set up @_ -- ugly */
1134	av_clear (defav);
1135	av_fill (defav, items - 1);
1136	while (items--)
1137	av_store (defav, items, SvREFCNT_inc (ST(items)));
1138
1139	sv = av_pop ((AV *)SvRV (yieldstack));
1140	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1141	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1142	ta.flags = 0;
1143	SvREFCNT_dec (sv);
1144	}
1145	break;	1245	break;
1146
1147	}	1246	}
1148		1247
		1248	BARRIER;
1149	TRANSFER (ta);	1249	TRANSFER (ta);
1150	}
1151		1250
1152	void	1251	if (GIMME_V != G_VOID && ta.next != ta.prev)
1153	_clone_state_from (SV *dst, SV *src)	1252	XSRETURN_YES;
		1253	}
		1254
		1255	bool
		1256	_destroy (SV *coro_sv)
1154	CODE:	1257	CODE:
1155	{	1258	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1156	struct coro *coro_src = SvSTATE (src);	1259	OUTPUT:
1157		1260	RETVAL
1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1159
1160	++coro_src->refcnt;
1161	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1162	}
1163		1261
1164	void	1262	void
1165	_exit (code)	1263	_exit (code)
1166	int code	1264	int code
1167	PROTOTYPE: $	1265	PROTOTYPE: $
1168	CODE:	1266	CODE:
1169	_exit (code);	1267	_exit (code);
1170		1268
1171	int	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
1172	cctx_count ()	1279	cctx_count ()
1173	CODE:	1280	CODE:
1174	RETVAL = cctx_count;	1281	RETVAL = cctx_count;
1175	OUTPUT:	1282	OUTPUT:
1176	RETVAL	1283	RETVAL
…		…
1195	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1302	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1196	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1303	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1197	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1304	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1198	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1305	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1199		1306
1200	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1307	coro_current = get_sv ("Coro::current", FALSE);
1201	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1308	SvREADONLY_on (coro_current);
1202		1309
1203	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1310	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1204	coro_ready[i] = newAV ();	1311	coro_ready[i] = newAV ();
1205		1312
1206	{	1313	{
1207	SV *sv = perl_get_sv("Coro::API", 1);	1314	SV *sv = perl_get_sv("Coro::API", 1);
1208		1315
1209	coroapi.schedule = api_schedule;	1316	coroapi.schedule = api_schedule;
		1317	coroapi.save = api_save;
1210	coroapi.cede = api_cede;	1318	coroapi.cede = api_cede;
		1319	coroapi.cede_notself = api_cede_notself;
1211	coroapi.ready = api_ready;	1320	coroapi.ready = api_ready;
		1321	coroapi.is_ready = api_is_ready;
1212	coroapi.nready = &coro_nready;	1322	coroapi.nready = &coro_nready;
1213	coroapi.current = coro_current;	1323	coroapi.current = coro_current;
1214		1324
1215	GCoroAPI = &coroapi;	1325	GCoroAPI = &coroapi;
1216	sv_setiv (sv, (IV)&coroapi);	1326	sv_setiv (sv, (IV)&coroapi);
1217	SvREADONLY_on (sv);	1327	SvREADONLY_on (sv);
1218	}	1328	}
1219	}	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)));
1220		1337
1221	int	1338	int
1222	prio (Coro::State coro, int newprio = 0)	1339	prio (Coro::State coro, int newprio = 0)
1223	ALIAS:	1340	ALIAS:
1224	nice = 1	1341	nice = 1
…		…
1227	RETVAL = coro->prio;	1344	RETVAL = coro->prio;
1228		1345
1229	if (items > 1)	1346	if (items > 1)
1230	{	1347	{
1231	if (ix)	1348	if (ix)
1232	newprio += coro->prio;	1349	newprio = coro->prio - newprio;
1233		1350
1234	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1351	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1235	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1352	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1236		1353
1237	coro->prio = newprio;	1354	coro->prio = newprio;
1238	}	1355	}
1239	}	1356	}
		1357	OUTPUT:
		1358	RETVAL
1240		1359
1241	void	1360	SV *
1242	ready (SV *self)	1361	ready (SV *self)
1243	PROTOTYPE: $	1362	PROTOTYPE: $
1244	CODE:	1363	CODE:
1245	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
1246		1375
1247	int	1376	int
1248	nready (...)	1377	nready (...)
1249	PROTOTYPE:	1378	PROTOTYPE:
1250	CODE:	1379	CODE:
…		…
1256		1385
1257	SV *	1386	SV *
1258	_get_state ()	1387	_get_state ()
1259	CODE:	1388	CODE:
1260	{	1389	{
1261	struct {	1390	struct io_state *data;
1262	int errorno;
1263	int laststype;
1264	int laststatval;
1265	Stat_t statcache;
1266	} data;
1267		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
1268	data.errorno = errno;	1397	data->errorno = errno;
1269	data.laststype = PL_laststype;	1398	data->laststype = PL_laststype;
1270	data.laststatval = PL_laststatval;	1399	data->laststatval = PL_laststatval;
1271	data.statcache = PL_statcache;	1400	data->statcache = PL_statcache;
1272
1273	RETVAL = newSVpvn ((char *)&data, sizeof data);
1274	}	1401	}
1275	OUTPUT:	1402	OUTPUT:
1276	RETVAL	1403	RETVAL
1277		1404
1278	void	1405	void
1279	_set_state (char *data_)	1406	_set_state (char *data_)
1280	PROTOTYPE: $	1407	PROTOTYPE: $
1281	CODE:	1408	CODE:
1282	{	1409	{
1283	struct {	1410	struct io_state *data = (void *)data_;
1284	int errorno;
1285	int laststype;
1286	int laststatval;
1287	Stat_t statcache;
1288	} *data = (void *)data_;
1289		1411
1290	errno = data->errorno;	1412	errno = data->errorno;
1291	PL_laststype = data->laststype;	1413	PL_laststype = data->laststype;
1292	PL_laststatval = data->laststatval;	1414	PL_laststatval = data->laststatval;
1293	PL_statcache = data->statcache;	1415	PL_statcache = data->statcache;
1294	}	1416	}
		1417

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