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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.77 by root, Tue Oct 31 23:55:33 2006 UTC vs.
Revision 1.145 by root, Mon Mar 12 21:40:14 2007 UTC

1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	#if PERL_VERSION < 6	9	#include <stdio.h>
		10	#include <errno.h>
		11	#include <assert.h>
		12
		13	#ifdef HAVE_MMAP
		14	# include <unistd.h>
		15	# include <sys/mman.h>
		16	# ifndef MAP_ANONYMOUS
		17	# ifdef MAP_ANON
		18	# define MAP_ANONYMOUS MAP_ANON
		19	# else
		20	# undef HAVE_MMAP
		21	# endif
		22	# endif
		23	# include <limits.h>
		24	# ifndef PAGESIZE
		25	# define PAGESIZE pagesize
		26	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		27	static long pagesize;
		28	# else
		29	# define BOOT_PAGESIZE (void)0
		30	# endif
		31	#else
		32	# define PAGESIZE 0
		33	# define BOOT_PAGESIZE (void)0
		34	#endif
		35
		36	#if CORO_USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		39	#else
		40	# define REGISTER_STACK(cctx,start,end)
		41	#endif
		42
		43	/* the maximum number of idle cctx that will be pooled */
		44	#define MAX_IDLE_CCTX 8
		45
		46	#define PERL_VERSION_ATLEAST(a,b,c) \
		47	(PERL_REVISION > (a) \
		48	|| (PERL_REVISION == (a) \
		49	&& (PERL_VERSION > (b) \
		50	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		51
		52	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	53	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	54	# define PL_ppaddr ppaddr
14	# endif	55	# endif
15	# ifndef call_sv	56	# ifndef call_sv
16	# define call_sv perl_call_sv	57	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	68	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	69	# define IS_PADCONST(v) 0
29	# endif	70	# endif
30	#endif	71	#endif
31		72
32	#include <errno.h>	73	/* 5.8.7 */
33		74	#ifndef SvRV_set
34	#ifdef HAVE_MMAP	75	# define SvRV_set(s,v) SvRV(s) = (v)
35	# include <unistd.h>
36	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS
38	# ifdef MAP_ANON
39	# define MAP_ANONYMOUS MAP_ANON
40	# else
41	# undef HAVE_MMAP
42	# endif
43	# endif	76	#endif
44	#endif
45		77
46	#define SUB_INIT "Coro::State::initialize"	78	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	#define UCORO_STATE "_coro_state"	79	# undef CORO_STACKGUARD
		80	#endif
		81
		82	#ifndef CORO_STACKGUARD
		83	# define CORO_STACKGUARD 0
		84	#endif
		85
		86	/* prefer perl internal functions over our own? */
		87	#ifndef CORO_PREFER_PERL_FUNCTIONS
		88	# define CORO_PREFER_PERL_FUNCTIONS 0
		89	#endif
48		90
49	/* The next macro should declare a variable stacklevel that contains and approximation	91	/* The next macro should declare a variable stacklevel that contains and approximation
50	* to the current C stack pointer. Its property is that it changes with each call	92	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	93	* and should be unique. */
		94	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	95	#define STACKLEVEL ((void *)&stacklevel)
53		96
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	97	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		98
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	99	#if __GNUC__ >= 3
		100	# define attribute(x) __attribute__(x)
		101	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		102	#else
		103	# define attribute(x)
		104	# define BARRIER
		105	#endif
		106
		107	#define NOINLINE attribute ((noinline))
57		108
58	#include "CoroAPI.h"	109	#include "CoroAPI.h"
59		110
60	#ifdef USE_ITHREADS	111	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	112	static perl_mutex coro_mutex;
…		…
64	#else	115	#else
65	# define LOCK (void)0	116	# define LOCK (void)0
66	# define UNLOCK (void)0	117	# define UNLOCK (void)0
67	#endif	118	#endif
68		119
		120	/* helper storage struct for Coro::AIO */
		121	struct io_state
		122	{
		123	int errorno;
		124	I32 laststype;
		125	int laststatval;
		126	Stat_t statcache;
		127	};
		128
		129	static size_t coro_stacksize = CORO_STACKSIZE;
69	static struct CoroAPI coroapi;	130	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	131	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	132	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV *coro_mortal; /* will be freed after next transfer */	133	static SV *coro_mortal; /* will be freed after next transfer */
75		134
76	/* this is actually not only the c stack but also c registers etc... */	135	static struct coro_cctx *cctx_first;
		136	static int cctx_count, cctx_idle;
		137
		138	/* this is a structure representing a c-level coroutine */
77	typedef struct {	139	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	140	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		141
		142	/* the stack */
		143	void *sptr;
		144	size_t ssize;
		145
		146	/* cpu state */
		147	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		148	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		149	JMPENV *top_env;
82	coro_context cctx;	150	coro_context cctx;
83		151
84	void *sptr;	152	#if CORO_USE_VALGRIND
85	long ssize; /* positive == mmap, otherwise malloc */	153	int valgrind_id;
86	} coro_stack;	154	#endif
		155	char inuse, mapped;
		156	} coro_cctx;
87		157
		158	enum {
		159	CF_RUNNING = 0x0001, /* coroutine is running */
		160	CF_READY = 0x0002, /* coroutine is ready */
		161	CF_NEW = 0x0004, /* has never been switched to */
		162	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		163	};
		164
		165	/* this is a structure representing a perl-level coroutine */
88	struct coro {	166	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	167	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	168	coro_cctx *cctx;
91
92	/* the optional C context */
93	coro_stack *stack;
94	void *cursp;
95	int gencnt;
96
97	/* optionally saved, might be zero */
98	AV *defav;
99	SV *defsv;
100	SV *errsv;
101
102	/* saved global state not related to stacks */
103	U8 dowarn;
104	I32 in_eval;
105
106	/* the stacks and related info (callchain etc..) */
107	PERL_SI *curstackinfo;
108	AV *curstack;
109	AV *mainstack;
110	SV **stack_sp;
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	CV *compcv;
115	SV **stack_base;
116	SV **stack_max;
117	SV **tmps_stack;
118	I32 tmps_floor;
119	I32 tmps_ix;
120	I32 tmps_max;
121	I32 *markstack;
122	I32 *markstack_ptr;
123	I32 *markstack_max;
124	I32 *scopestack;
125	I32 scopestack_ix;
126	I32 scopestack_max;
127	ANY *savestack;
128	I32 savestack_ix;
129	I32 savestack_max;
130	OP **retstack;
131	I32 retstack_ix;
132	I32 retstack_max;
133	PMOP *curpm;
134	COP *curcop;
135	JMPENV *top_env;
136		169
137	/* data associated with this coroutine (initial args) */	170	/* data associated with this coroutine (initial args) */
138	AV *args;	171	AV *args;
		172	int refcnt;
		173	int save; /* CORO_SAVE flags */
		174	int flags; /* CF_ flags */
		175
		176	/* optionally saved, might be zero */
		177	AV *defav; /* @_ */
		178	SV *defsv; /* $_ */
		179	SV *errsv; /* $@ */
		180	SV *irssv; /* $/ */
		181	SV *irssv_sv; /* real $/ cache */
		182
		183	#define VAR(name,type) type name;
		184	# include "state.h"
		185	#undef VAR
		186
		187	/* coro process data */
		188	int prio;
139	};	189	};
140		190
141	typedef struct coro *Coro__State;	191	typedef struct coro *Coro__State;
142	typedef struct coro *Coro__State_or_hashref;	192	typedef struct coro *Coro__State_or_hashref;
143		193
		194	/** Coro ********************************************************************/
		195
		196	#define PRIO_MAX 3
		197	#define PRIO_HIGH 1
		198	#define PRIO_NORMAL 0
		199	#define PRIO_LOW -1
		200	#define PRIO_IDLE -3
		201	#define PRIO_MIN -4
		202
		203	/* for Coro.pm */
		204	static SV *coro_current;
		205	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		206	static int coro_nready;
		207
		208	/** lowlevel stuff **********************************************************/
		209
144	static AV *	210	static AV *
145	coro_clone_padlist (pTHX_ CV *cv)	211	coro_clone_padlist (CV *cv)
146	{	212	{
147	AV *padlist = CvPADLIST (cv);	213	AV *padlist = CvPADLIST (cv);
148	AV *newpadlist, *newpad;	214	AV *newpadlist, *newpad;
149		215
150	newpadlist = newAV ();	216	newpadlist = newAV ();
151	AvREAL_off (newpadlist);	217	AvREAL_off (newpadlist);
		218	#if PERL_VERSION_ATLEAST (5,9,0)
		219	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		220	#else
152	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	221	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		222	#endif
153	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	223	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
154	--AvFILLp (padlist);	224	--AvFILLp (padlist);
155		225
156	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	226	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
157	av_store (newpadlist, 1, (SV *)newpad);	227	av_store (newpadlist, 1, (SV *)newpad);
158		228
159	return newpadlist;	229	return newpadlist;
160	}	230	}
161		231
162	static void	232	static void
163	free_padlist (pTHX_ AV *padlist)	233	free_padlist (AV *padlist)
164	{	234	{
165	/* may be during global destruction */	235	/* may be during global destruction */
166	if (SvREFCNT (padlist))	236	if (SvREFCNT (padlist))
167	{	237	{
168	I32 i = AvFILLp (padlist);	238	I32 i = AvFILLp (padlist);
…		…
189	AV *padlist;	259	AV *padlist;
190	AV *av = (AV *)mg->mg_obj;	260	AV *av = (AV *)mg->mg_obj;
191		261
192	/* casting is fun. */	262	/* casting is fun. */
193	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	263	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
194	free_padlist (aTHX_ padlist);	264	free_padlist (padlist);
195		265
196	SvREFCNT_dec (av);	266	SvREFCNT_dec (av);
197		267
198	return 0;	268	return 0;
199	}	269	}
200		270
201	#define PERL_MAGIC_coro PERL_MAGIC_ext	271	#define PERL_MAGIC_coro PERL_MAGIC_ext
202		272
203	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	273	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
204		274
		275	#define CORO_MAGIC(cv) \
		276	SvMAGIC (cv) \
		277	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		278	? SvMAGIC (cv) \
		279	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		280	: 0
		281
205	/* the next two functions merely cache the padlists */	282	/* the next two functions merely cache the padlists */
206	static void	283	static void
207	get_padlist (pTHX_ CV *cv)	284	get_padlist (CV *cv)
208	{	285	{
209	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	286	MAGIC *mg = CORO_MAGIC (cv);
		287	AV *av;
210		288
211	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	289	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
212	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	290	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
213	else	291	else
214	{	292	{
215	#if 0	293	#if CORO_PREFER_PERL_FUNCTIONS
216	/* this should work - but it doesn't :( */	294	/* this is probably cleaner, but also slower? */
217	CV *cp = Perl_cv_clone (aTHX_ cv);	295	CV *cp = Perl_cv_clone (cv);
218	CvPADLIST (cv) = CvPADLIST (cp);	296	CvPADLIST (cv) = CvPADLIST (cp);
219	CvPADLIST (cp) = 0;	297	CvPADLIST (cp) = 0;
220	SvREFCNT_dec (cp);	298	SvREFCNT_dec (cp);
221	#else	299	#else
222	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	300	CvPADLIST (cv) = coro_clone_padlist (cv);
223	#endif	301	#endif
224	}	302	}
225	}	303	}
226		304
227	static void	305	static void
228	put_padlist (pTHX_ CV *cv)	306	put_padlist (CV *cv)
229	{	307	{
230	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	308	MAGIC *mg = CORO_MAGIC (cv);
		309	AV *av;
231		310
232	if (!mg)	311	if (!mg)
233	{	312	{
234	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	313	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
235	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	314	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
236	mg->mg_virtual = &vtbl_coro;	315	mg->mg_virtual = &vtbl_coro;
237	mg->mg_obj = (SV *)newAV ();	316	mg->mg_obj = (SV *)newAV ();
238	}	317	}
239		318
240	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	319	av = (AV *)mg->mg_obj;
		320
		321	if (AvFILLp (av) >= AvMAX (av))
		322	av_extend (av, AvMAX (av) + 1);
		323
		324	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
241	}	325	}
		326
		327	/** load & save, init *******************************************************/
242		328
243	#define SB do {	329	#define SB do {
244	#define SE } while (0)	330	#define SE } while (0)
245		331
246	#define LOAD(state) load_state(aTHX_ (state));
247	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
248
249	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	332	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
250		333
251	static void	334	static void
252	load_state(pTHX_ Coro__State c)	335	load_perl (Coro__State c)
253	{	336	{
254	PL_dowarn = c->dowarn;	337	#define VAR(name,type) PL_ ## name = c->name;
255	PL_in_eval = c->in_eval;	338	# include "state.h"
256		339	#undef VAR
257	PL_curstackinfo = c->curstackinfo;
258	PL_curstack = c->curstack;
259	PL_mainstack = c->mainstack;
260	PL_stack_sp = c->stack_sp;
261	PL_op = c->op;
262	PL_curpad = c->curpad;
263	PL_comppad = c->comppad;
264	PL_compcv = c->compcv;
265	PL_stack_base = c->stack_base;
266	PL_stack_max = c->stack_max;
267	PL_tmps_stack = c->tmps_stack;
268	PL_tmps_floor = c->tmps_floor;
269	PL_tmps_ix = c->tmps_ix;
270	PL_tmps_max = c->tmps_max;
271	PL_markstack = c->markstack;
272	PL_markstack_ptr = c->markstack_ptr;
273	PL_markstack_max = c->markstack_max;
274	PL_scopestack = c->scopestack;
275	PL_scopestack_ix = c->scopestack_ix;
276	PL_scopestack_max = c->scopestack_max;
277	PL_savestack = c->savestack;
278	PL_savestack_ix = c->savestack_ix;
279	PL_savestack_max = c->savestack_max;
280	#if PERL_VERSION < 9
281	PL_retstack = c->retstack;
282	PL_retstack_ix = c->retstack_ix;
283	PL_retstack_max = c->retstack_max;
284	#endif
285	PL_curpm = c->curpm;
286	PL_curcop = c->curcop;
287	PL_top_env = c->top_env;
288		340
289	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	341	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
290	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	342	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
291	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	343	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		344	if (c->irssv)
		345	{
		346	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		347	SvREFCNT_dec (c->irssv);
		348	else
		349	{
		350	REPLACE_SV (PL_rs, c->irssv);
		351	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		352	sv_setsv (c->irssv_sv, PL_rs);
		353	}
		354	}
292		355
293	{	356	{
294	dSP;	357	dSP;
295	CV *cv;	358	CV *cv;
296		359
297	/* now do the ugly restore mess */	360	/* now do the ugly restore mess */
298	while ((cv = (CV *)POPs))	361	while ((cv = (CV *)POPs))
299	{	362	{
300	AV *padlist = (AV *)POPs;
301
302	if (padlist)
303	{
304	put_padlist (aTHX_ cv); /* mark this padlist as available */	363	put_padlist (cv); /* mark this padlist as available */
305	CvPADLIST(cv) = padlist;	364	CvDEPTH (cv) = PTR2IV (POPs);
306	}	365	CvPADLIST (cv) = (AV *)POPs;
307
308	++CvDEPTH(cv);
309	}	366	}
310		367
311	PUTBACK;	368	PUTBACK;
312	}	369	}
		370	assert (!PL_comppad || AvARRAY (PL_comppad));//D
313	}	371	}
314		372
315	static void	373	static void
316	save_state(pTHX_ Coro__State c, int flags)	374	save_perl (Coro__State c)
317	{	375	{
		376	assert (!PL_comppad || AvARRAY (PL_comppad));//D
318	{	377	{
319	dSP;	378	dSP;
320	I32 cxix = cxstack_ix;	379	I32 cxix = cxstack_ix;
321	PERL_CONTEXT *ccstk = cxstack;	380	PERL_CONTEXT *ccstk = cxstack;
322	PERL_SI *top_si = PL_curstackinfo;	381	PERL_SI *top_si = PL_curstackinfo;
…		…
324	/*	383	/*
325	* the worst thing you can imagine happens first - we have to save	384	* the worst thing you can imagine happens first - we have to save
326	* (and reinitialize) all cv's in the whole callchain :(	385	* (and reinitialize) all cv's in the whole callchain :(
327	*/	386	*/
328		387
		388	EXTEND (SP, 3 + 1);
329	PUSHs (Nullsv);	389	PUSHs (Nullsv);
330	/* this loop was inspired by pp_caller */	390	/* this loop was inspired by pp_caller */
331	for (;;)	391	for (;;)
332	{	392	{
333	while (cxix >= 0)	393	while (cxix >= 0)
334	{	394	{
335	PERL_CONTEXT *cx = &ccstk[cxix--];	395	PERL_CONTEXT *cx = &ccstk[cxix--];
336		396
337	if (CxTYPE(cx) == CXt_SUB)	397	if (CxTYPE (cx) == CXt_SUB)
338	{	398	{
339	CV *cv = cx->blk_sub.cv;	399	CV *cv = cx->blk_sub.cv;
		400
340	if (CvDEPTH(cv))	401	if (CvDEPTH (cv))
341	{	402	{
342	EXTEND (SP, CvDEPTH(cv)*2);	403	EXTEND (SP, 3);
343
344	while (--CvDEPTH(cv))
345	{
346	/* this tells the restore code to increment CvDEPTH */
347	PUSHs (Nullsv);
348	PUSHs ((SV *)cv);
349	}
350
351	PUSHs ((SV *)CvPADLIST(cv));	404	PUSHs ((SV *)CvPADLIST (cv));
		405	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
352	PUSHs ((SV *)cv);	406	PUSHs ((SV *)cv);
353		407
		408	CvDEPTH (cv) = 0;
354	get_padlist (aTHX_ cv);	409	get_padlist (cv);
355	}	410	}
356	}	411	}
357	#ifdef CXt_FORMAT
358	else if (CxTYPE(cx) == CXt_FORMAT)
359	{
360	/* I never used formats, so how should I know how these are implemented? */
361	/* my bold guess is as a simple, plain sub... */
362	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
363	}
364	#endif
365	}	412	}
366		413
367	if (top_si->si_type == PERLSI_MAIN)	414	if (top_si->si_type == PERLSI_MAIN)
368	break;	415	break;
369		416
…		…
373	}	420	}
374		421
375	PUTBACK;	422	PUTBACK;
376	}	423	}
377		424
378	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	425	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
379	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	426	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
380	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	427	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		428	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
381		429
382	c->dowarn = PL_dowarn;	430	#define VAR(name,type)c->name = PL_ ## name;
383	c->in_eval = PL_in_eval;	431	# include "state.h"
384		432	#undef VAR
385	c->curstackinfo = PL_curstackinfo;
386	c->curstack = PL_curstack;
387	c->mainstack = PL_mainstack;
388	c->stack_sp = PL_stack_sp;
389	c->op = PL_op;
390	c->curpad = PL_curpad;
391	c->comppad = PL_comppad;
392	c->compcv = PL_compcv;
393	c->stack_base = PL_stack_base;
394	c->stack_max = PL_stack_max;
395	c->tmps_stack = PL_tmps_stack;
396	c->tmps_floor = PL_tmps_floor;
397	c->tmps_ix = PL_tmps_ix;
398	c->tmps_max = PL_tmps_max;
399	c->markstack = PL_markstack;
400	c->markstack_ptr = PL_markstack_ptr;
401	c->markstack_max = PL_markstack_max;
402	c->scopestack = PL_scopestack;
403	c->scopestack_ix = PL_scopestack_ix;
404	c->scopestack_max = PL_scopestack_max;
405	c->savestack = PL_savestack;
406	c->savestack_ix = PL_savestack_ix;
407	c->savestack_max = PL_savestack_max;
408	#if PERL_VERSION < 9
409	c->retstack = PL_retstack;
410	c->retstack_ix = PL_retstack_ix;
411	c->retstack_max = PL_retstack_max;
412	#endif
413	c->curpm = PL_curpm;
414	c->curcop = PL_curcop;
415	c->top_env = PL_top_env;
416	}	433	}
417		434
418	/*	435	/*
419	* allocate various perl stacks. This is an exact copy	436	* allocate various perl stacks. This is an exact copy
420	* of perl.c:init_stacks, except that it uses less memory	437	* of perl.c:init_stacks, except that it uses less memory
421	* on the (sometimes correct) assumption that coroutines do	438	* on the (sometimes correct) assumption that coroutines do
422	* not usually need a lot of stackspace.	439	* not usually need a lot of stackspace.
423	*/	440	*/
		441	#if CORO_PREFER_PERL_FUNCTIONS
		442	# define coro_init_stacks init_stacks
		443	#else
424	static void	444	static void
425	coro_init_stacks (pTHX)	445	coro_init_stacks ()
426	{	446	{
427	LOCK;
428
429	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	447	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
430	PL_curstackinfo->si_type = PERLSI_MAIN;	448	PL_curstackinfo->si_type = PERLSI_MAIN;
431	PL_curstack = PL_curstackinfo->si_stack;	449	PL_curstack = PL_curstackinfo->si_stack;
432	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
433		451
434	PL_stack_base = AvARRAY(PL_curstack);	452	PL_stack_base = AvARRAY(PL_curstack);
435	PL_stack_sp = PL_stack_base;	453	PL_stack_sp = PL_stack_base;
436	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
437		455
438	New(50,PL_tmps_stack,96,SV*);	456	New(50,PL_tmps_stack,128,SV*);
439	PL_tmps_floor = -1;	457	PL_tmps_floor = -1;
440	PL_tmps_ix = -1;	458	PL_tmps_ix = -1;
441	PL_tmps_max = 96;	459	PL_tmps_max = 128;
442		460
443	New(54,PL_markstack,16,I32);	461	New(54,PL_markstack,32,I32);
444	PL_markstack_ptr = PL_markstack;	462	PL_markstack_ptr = PL_markstack;
445	PL_markstack_max = PL_markstack + 16;	463	PL_markstack_max = PL_markstack + 32;
446		464
447	#ifdef SET_MARK_OFFSET	465	#ifdef SET_MARK_OFFSET
448	SET_MARK_OFFSET;	466	SET_MARK_OFFSET;
449	#endif	467	#endif
450		468
451	New(54,PL_scopestack,16,I32);	469	New(54,PL_scopestack,32,I32);
452	PL_scopestack_ix = 0;	470	PL_scopestack_ix = 0;
453	PL_scopestack_max = 16;	471	PL_scopestack_max = 32;
454		472
455	New(54,PL_savestack,96,ANY);	473	New(54,PL_savestack,64,ANY);
456	PL_savestack_ix = 0;	474	PL_savestack_ix = 0;
457	PL_savestack_max = 96;	475	PL_savestack_max = 64;
458		476
459	#if PERL_VERSION < 9	477	#if !PERL_VERSION_ATLEAST (5,9,0)
460	New(54,PL_retstack,8,OP*);	478	New(54,PL_retstack,16,OP*);
461	PL_retstack_ix = 0;	479	PL_retstack_ix = 0;
462	PL_retstack_max = 8;	480	PL_retstack_max = 16;
463	#endif	481	#endif
464
465	UNLOCK;
466	}	482	}
		483	#endif
467		484
468	/*	485	/*
469	* destroy the stacks, the callchain etc...	486	* destroy the stacks, the callchain etc...
470	*/	487	*/
471	static void	488	static void
472	destroy_stacks(pTHX)	489	coro_destroy_stacks ()
473	{	490	{
474	if (!IN_DESTRUCT)	491	if (!IN_DESTRUCT)
475	{	492	{
476	/* is this ugly, I ask? */	493	/* restore all saved variables and stuff */
477	LEAVE_SCOPE (0);	494	LEAVE_SCOPE (0);
		495	assert (PL_tmps_floor == -1);
478		496
479	/* sure it is, but more important: is it correct?? :/ */	497	/* free all temporaries */
480	FREETMPS;	498	FREETMPS;
		499	assert (PL_tmps_ix == -1);
481		500
		501	/* unwind all extra stacks */
482	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	502	POPSTACK_TO (PL_mainstack);
		503
		504	/* unwind main stack */
		505	dounwind (-1);
483	}	506	}
484		507
485	while (PL_curstackinfo->si_next)	508	while (PL_curstackinfo->si_next)
486	PL_curstackinfo = PL_curstackinfo->si_next;	509	PL_curstackinfo = PL_curstackinfo->si_next;
487		510
488	while (PL_curstackinfo)	511	while (PL_curstackinfo)
489	{	512	{
490	PERL_SI *p = PL_curstackinfo->si_prev;	513	PERL_SI *p = PL_curstackinfo->si_prev;
491		514
492	{ /*D*//*remove*/
493	dSP;
494	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
495	PUTBACK; /* possibly superfluous */
496	}
497
498	if (!IN_DESTRUCT)	515	if (!IN_DESTRUCT)
499	{
500	dounwind (-1);/*D*//*remove*/
501	SvREFCNT_dec (PL_curstackinfo->si_stack);	516	SvREFCNT_dec (PL_curstackinfo->si_stack);
502	}
503		517
504	Safefree (PL_curstackinfo->si_cxstack);	518	Safefree (PL_curstackinfo->si_cxstack);
505	Safefree (PL_curstackinfo);	519	Safefree (PL_curstackinfo);
506	PL_curstackinfo = p;	520	PL_curstackinfo = p;
507	}	521	}
508		522
509	Safefree (PL_tmps_stack);	523	Safefree (PL_tmps_stack);
510	Safefree (PL_markstack);	524	Safefree (PL_markstack);
511	Safefree (PL_scopestack);	525	Safefree (PL_scopestack);
512	Safefree (PL_savestack);	526	Safefree (PL_savestack);
513	#if PERL_VERSION < 9	527	#if !PERL_VERSION_ATLEAST (5,9,0)
514	Safefree (PL_retstack);	528	Safefree (PL_retstack);
515	#endif	529	#endif
516	}	530	}
517		531
518	static void	532	/** coroutine stack handling ************************************************/
519	allocate_stack (Coro__State ctx, int alloc)
520	{
521	coro_stack *stack;
522		533
523	New (0, stack, 1, coro_stack);
524
525	stack->refcnt = 1;
526	stack->usecnt = 1;
527	stack->gencnt = ctx->gencnt = 0;
528
529	if (alloc)
530	{
531	#if HAVE_MMAP
532	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
533	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
534	if (stack->sptr == (void *)-1)
535	#endif
536	{
537	stack->ssize = - (STACKSIZE * (long)sizeof (long));
538	New (0, stack->sptr, STACKSIZE, long);
539	}
540	}
541	else
542	stack->sptr = 0;
543
544	ctx->stack = stack;
545	}
546
547	static void	534	static void
548	deallocate_stack (Coro__State ctx)	535	setup_coro (struct coro *coro)
549	{
550	coro_stack *stack = ctx->stack;
551
552	ctx->stack = 0;
553
554	if (stack)
555	{
556	if (!--stack->refcnt)
557	{
558	#ifdef HAVE_MMAP
559	if (stack->ssize > 0 && stack->sptr)
560	munmap (stack->sptr, stack->ssize);
561	else
562	#endif
563	Safefree (stack->sptr);
564
565	Safefree (stack);
566	}
567	else if (ctx->gencnt == stack->gencnt)
568	--stack->usecnt;
569	}
570	}
571
572	static void
573	setup_coro (void *arg)
574	{	536	{
575	/*	537	/*
576	* emulate part of the perl startup here.	538	* emulate part of the perl startup here.
577	*/	539	*/
578	dTHX;	540
		541	coro_init_stacks ();
		542
		543	PL_curcop = &PL_compiling;
		544	PL_in_eval = EVAL_NULL;
		545	PL_comppad = 0;
		546	PL_curpm = 0;
		547	PL_localizing = 0;
		548	PL_dirty = 0;
		549	PL_restartop = 0;
		550
		551	{
		552	dSP;
		553	LOGOP myop;
		554
		555	SvREFCNT_dec (GvAV (PL_defgv));
		556	GvAV (PL_defgv) = coro->args; coro->args = 0;
		557
		558	Zero (&myop, 1, LOGOP);
		559	myop.op_next = Nullop;
		560	myop.op_flags = OPf_WANT_VOID;
		561
		562	PUSHMARK (SP);
		563	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		564	PUTBACK;
		565	PL_op = (OP *)&myop;
		566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		567	SPAGAIN;
		568	}
		569
		570	ENTER; /* necessary e.g. for dounwind */
		571	}
		572
		573	static void
		574	free_coro_mortal ()
		575	{
		576	if (coro_mortal)
		577	{
		578	SvREFCNT_dec (coro_mortal);
		579	coro_mortal = 0;
		580	}
		581	}
		582
		583	/* inject a fake call to Coro::State::_cctx_init into the execution */
		584	static void NOINLINE
		585	prepare_cctx (coro_cctx *cctx)
		586	{
579	dSP;	587	dSP;
580	Coro__State ctx = (Coro__State)arg;	588	LOGOP myop;
581	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
582		589
583	coro_init_stacks (aTHX);	590	Zero (&myop, 1, LOGOP);
584	/*PL_curcop = 0;*/	591	myop.op_next = PL_op;
585	/*PL_in_eval = PL_in_eval;*/ /* inherit */	592	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
586	SvREFCNT_dec (GvAV (PL_defgv));
587	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
588		593
		594	PUSHMARK (SP);
		595	EXTEND (SP, 2);
		596	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		597	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		598	PUTBACK;
		599	PL_op = (OP *)&myop;
		600	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
589	SPAGAIN;	601	SPAGAIN;
590
591	if (ctx->stack)
592	{
593	ctx->cursp = 0;
594
595	PUSHMARK(SP);
596	PUTBACK;
597	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
598
599	if (SvTRUE (ERRSV))
600	croak (NULL);
601	else
602	croak ("FATAL: CCTXT coroutine returned!");
603	}
604	else
605	{
606	UNOP myop;
607
608	PL_op = (OP *)&myop;
609
610	Zero(&myop, 1, UNOP);
611	myop.op_next = Nullop;
612	myop.op_flags = OPf_WANT_VOID;
613
614	PUSHMARK(SP);
615	XPUSHs (sub_init);
616	/*
617	* the next line is slightly wrong, as PL_op->op_next
618	* is actually being executed so we skip the first op.
619	* that doesn't matter, though, since it is only
620	* pp_nextstate and we never return...
621	* ah yes, and I don't care anyways ;)
622	*/
623	PUTBACK;
624	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
625	SPAGAIN;
626
627	ENTER; /* necessary e.g. for dounwind */
628	}
629	}	602	}
630		603
631	static void	604	static void
632	continue_coro (void *arg)	605	coro_run (void *arg)
633	{	606	{
		607	/* coro_run is the alternative tail of transfer(), so unlock here. */
		608	UNLOCK;
		609
634	/*	610	/*
635	* this is a _very_ stripped down perl interpreter ;)	611	* this is a _very_ stripped down perl interpreter ;)
636	*/	612	*/
637	dTHX;
638	Coro__State ctx = (Coro__State)arg;
639
640	PL_top_env = &ctx->start_env;	613	PL_top_env = &PL_start_env;
641		614
642	ctx->cursp = 0;	615	/* inject call to cctx_init */
		616	prepare_cctx ((coro_cctx *)arg);
		617
		618	/* somebody will hit me for both perl_run and PL_restartop */
		619	PL_restartop = PL_op;
		620	perl_run (PL_curinterp);
		621
		622	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		623	abort ();
		624	}
		625
		626	static coro_cctx *
		627	cctx_new ()
		628	{
		629	coro_cctx *cctx;
		630	void *stack_start;
		631	size_t stack_size;
		632
		633	++cctx_count;
		634
		635	Newz (0, cctx, 1, coro_cctx);
		636
		637	#if HAVE_MMAP
		638
		639	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		640	/* mmap supposedly does allocate-on-write for us */
		641	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		642
		643	if (cctx->sptr != (void *)-1)
		644	{
		645	# if CORO_STACKGUARD
		646	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		647	# endif
		648	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		649	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		650	cctx->mapped = 1;
		651	}
		652	else
		653	#endif
		654	{
		655	cctx->ssize = coro_stacksize * (long)sizeof (long);
		656	New (0, cctx->sptr, coro_stacksize, long);
		657
		658	if (!cctx->sptr)
		659	{
		660	perror ("FATAL: unable to allocate stack for coroutine");
		661	_exit (EXIT_FAILURE);
		662	}
		663
		664	stack_start = cctx->sptr;
		665	stack_size = cctx->ssize;
		666	}
		667
		668	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		669	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		670
		671	return cctx;
		672	}
		673
		674	static void
		675	cctx_destroy (coro_cctx *cctx)
		676	{
		677	if (!cctx)
		678	return;
		679
		680	--cctx_count;
		681
		682	#if CORO_USE_VALGRIND
		683	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		684	#endif
		685
		686	#if HAVE_MMAP
		687	if (cctx->mapped)
		688	munmap (cctx->sptr, cctx->ssize);
		689	else
		690	#endif
		691	Safefree (cctx->sptr);
		692
		693	Safefree (cctx);
		694	}
		695
		696	static coro_cctx *
		697	cctx_get ()
		698	{
		699	while (cctx_first)
		700	{
		701	coro_cctx *cctx = cctx_first;
		702	cctx_first = cctx->next;
		703	--cctx_idle;
		704
		705	if (cctx->ssize >= coro_stacksize)
		706	return cctx;
		707
		708	cctx_destroy (cctx);
		709	}
		710
643	PL_op = PL_op->op_next;	711	PL_op = PL_op->op_next;
644	CALLRUNOPS(aTHX);	712	return cctx_new ();
645
646	abort ();
647	}	713	}
648		714
649	static void	715	static void
		716	cctx_put (coro_cctx *cctx)
		717	{
		718	/* free another cctx if overlimit */
		719	if (cctx_idle >= MAX_IDLE_CCTX)
		720	{
		721	coro_cctx *first = cctx_first;
		722	cctx_first = first->next;
		723	--cctx_idle;
		724
		725	assert (!first->inuse);
		726	cctx_destroy (first);
		727	}
		728
		729	++cctx_idle;
		730	cctx->next = cctx_first;
		731	cctx_first = cctx;
		732	}
		733
		734	/** coroutine switching *****************************************************/
		735
		736	/* never call directly, always through the coro_state_transfer global variable */
		737	static void NOINLINE
650	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	738	transfer (struct coro *prev, struct coro *next)
651	{	739	{
652	dSTACKLEVEL;	740	dSTACKLEVEL;
653		741
		742	/* sometimes transfer is only called to set idle_sp */
		743	if (!next)
		744	{
		745	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		746	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		747	}
654	if (prev != next)	748	else if (prev != next)
655	{	749	{
656	if (next->mainstack)	750	coro_cctx *prev__cctx;
		751
		752	if (prev->flags & CF_NEW)
657	{	753	{
658	LOCK;	754	/* create a new empty context */
659	SAVE (prev, flags);	755	Newz (0, prev->cctx, 1, coro_cctx);
660	LOAD (next);	756	prev->cctx->inuse = 1;
661	UNLOCK;	757	prev->flags &= ~CF_NEW;
662		758	prev->flags |= CF_RUNNING;
663	/* mark this state as in-use */
664	next->mainstack = 0;
665	next->tmps_ix = -2;
666
667	/* stacklevel changed? if yes, grab the stack for us! */
668	if (flags & TRANSFER_SAVE_CCTXT)
669	{
670	if (!prev->stack)
671	allocate_stack (prev, 0);
672	else if (prev->cursp != stacklevel
673	&& prev->stack->usecnt > 1)
674	{
675	prev->gencnt = ++prev->stack->gencnt;
676	prev->stack->usecnt = 1;
677	}
678
679	/* has our stack been invalidated? */
680	if (next->stack && next->stack->gencnt != next->gencnt)
681	{
682	deallocate_stack (next);
683	allocate_stack (next, 1);
684	coro_create (&(next->stack->cctx),
685	continue_coro, (void *)next,
686	next->stack->sptr, labs (next->stack->ssize));
687	}
688
689	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
690	prev->cursp = stacklevel;
691	/* don't add any code here */
692	}
693	else
694	next->cursp = stacklevel;
695	}	759	}
696	else if (next->tmps_ix == -2)	760
697	croak ("tried to transfer to running coroutine");	761	/*TODO: must not croak here */
		762	if (!prev->flags & CF_RUNNING)
		763	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		764
		765	if (next->flags & CF_RUNNING)
		766	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		767
		768	if (next->flags & CF_DESTROYED)
		769	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		770
		771	prev->flags &= ~CF_RUNNING;
		772	next->flags |= CF_RUNNING;
		773
		774	LOCK;
		775
		776	if (next->flags & CF_NEW)
		777	{
		778	/* need to start coroutine */
		779	next->flags &= ~CF_NEW;
		780	/* first get rid of the old state */
		781	save_perl (prev);
		782	/* setup coroutine call */
		783	setup_coro (next);
		784	/* need a new stack */
		785	assert (!next->cctx);
		786	}
698	else	787	else
699	{	788	{
700	LOCK;	789	/* coroutine already started */
701	SAVE (prev, -1); /* first get rid of the old state */	790	save_perl (prev);
702	UNLOCK;	791	load_perl (next);
703
704	if (flags & TRANSFER_SAVE_CCTXT)
705	{
706	if (!prev->stack)
707	allocate_stack (prev, 0);
708
709	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
710	{
711	PL_top_env = &next->start_env;
712
713	setup_coro (next);
714	next->cursp = stacklevel;
715
716	prev->stack->refcnt++;
717	prev->stack->usecnt++;
718	next->stack = prev->stack;
719	next->gencnt = prev->gencnt;
720	}
721	else
722	{
723	assert (!next->stack);
724	allocate_stack (next, 1);
725	coro_create (&(next->stack->cctx),
726	setup_coro, (void *)next,
727	next->stack->sptr, labs (next->stack->ssize));
728	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
729	prev->cursp = stacklevel;
730	/* don't add any code here */
731	}
732	}
733	else
734	{
735	setup_coro (next);
736	next->cursp = stacklevel;
737	}
738	}	792	}
739	}
740		793
741	LOCK;	794	prev__cctx = prev->cctx;
742	if (coro_mortal)	795
743	{	796	/* possibly "free" the cctx */
744	SvREFCNT_dec (coro_mortal);	797	if (prev__cctx->idle_sp == STACKLEVEL)
		798	{
		799	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		800	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		801
		802	prev->cctx = 0;
		803
		804	cctx_put (prev__cctx);
		805	prev__cctx->inuse = 0;
		806	}
		807
		808	if (!next->cctx)
		809	{
		810	next->cctx = cctx_get ();
		811	assert (!next->cctx->inuse);
		812	next->cctx->inuse = 1;
		813	}
		814
		815	if (prev__cctx != next->cctx)
		816	{
		817	prev__cctx->top_env = PL_top_env;
		818	PL_top_env = next->cctx->top_env;
		819	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		820	}
		821
745	coro_mortal = 0;	822	free_coro_mortal ();
746	}
747	UNLOCK;	823	UNLOCK;
		824	}
748	}	825	}
749		826
750	#define SV_CORO(sv,func) \	827	struct transfer_args
751	do { \	828	{
752	if (SvROK (sv)) \	829	struct coro *prev, *next;
753	sv = SvRV (sv); \	830	};
754	\
755	if (SvTYPE (sv) == SVt_PVHV) \
756	{ \
757	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
758	\
759	if (!he) \
760	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
761	\
762	(sv) = SvRV (HeVAL(he)); \
763	} \
764	\
765	/* must also be changed inside Coro::Cont::yield */ \
766	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
767	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
768	\
769	} while(0)
770		831
771	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	832	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
772		833
		834	/** high level stuff ********************************************************/
		835
773	static void	836	static int
		837	coro_state_destroy (struct coro *coro)
		838	{
		839	if (coro->flags & CF_DESTROYED)
		840	return 0;
		841
		842	coro->flags |= CF_DESTROYED;
		843
		844	if (coro->flags & CF_READY)
		845	{
		846	/* reduce nready, as destroying a ready coro effectively unreadies it */
		847	/* alternative: look through all ready queues and remove the coro */
		848	LOCK;
		849	--coro_nready;
		850	UNLOCK;
		851	}
		852	else
		853	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		854
		855	if (coro->mainstack && coro->mainstack != main_mainstack)
		856	{
		857	struct coro temp;
		858
		859	assert (!(coro->flags & CF_RUNNING));
		860
		861	Zero (&temp, 1, struct coro);
		862	temp.save = CORO_SAVE_ALL;
		863
		864	if (coro->flags & CF_RUNNING)
		865	croak ("FATAL: tried to destroy currently running coroutine");
		866
		867	save_perl (&temp);
		868	load_perl (coro);
		869
		870	coro_destroy_stacks ();
		871
		872	load_perl (&temp); /* this will get rid of defsv etc.. */
		873
		874	coro->mainstack = 0;
		875	}
		876
		877	cctx_destroy (coro->cctx);
		878	SvREFCNT_dec (coro->args);
		879
		880	return 1;
		881	}
		882
		883	static int
		884	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		885	{
		886	struct coro *coro = (struct coro *)mg->mg_ptr;
		887	mg->mg_ptr = 0;
		888
		889	if (--coro->refcnt < 0)
		890	{
		891	coro_state_destroy (coro);
		892	Safefree (coro);
		893	}
		894
		895	return 0;
		896	}
		897
		898	static int
		899	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		900	{
		901	struct coro *coro = (struct coro *)mg->mg_ptr;
		902
		903	++coro->refcnt;
		904
		905	return 0;
		906	}
		907
		908	static MGVTBL coro_state_vtbl = {
		909	0, 0, 0, 0,
		910	coro_state_free,
		911	0,
		912	#ifdef MGf_DUP
		913	coro_state_dup,
		914	#else
		915	# define MGf_DUP 0
		916	#endif
		917	};
		918
		919	static struct coro *
		920	SvSTATE (SV *coro)
		921	{
		922	HV *stash;
		923	MAGIC *mg;
		924
		925	if (SvROK (coro))
		926	coro = SvRV (coro);
		927
		928	stash = SvSTASH (coro);
		929	if (stash != coro_stash && stash != coro_state_stash)
		930	{
		931	/* very slow, but rare, check */
		932	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		933	croak ("Coro::State object required");
		934	}
		935
		936	mg = CORO_MAGIC (coro);
		937	return (struct coro *)mg->mg_ptr;
		938	}
		939
		940	static void
		941	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		942	{
		943	ta->prev = SvSTATE (prev_sv);
		944	ta->next = SvSTATE (next_sv);
		945	}
		946
		947	static void
774	api_transfer(pTHX_ SV *prev, SV *next, int flags)	948	api_transfer (SV *prev_sv, SV *next_sv)
775	{	949	{
776	SV_CORO (prev, "Coro::transfer");	950	struct transfer_args ta;
777	SV_CORO (next, "Coro::transfer");
778		951
779	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	952	prepare_transfer (&ta, prev_sv, next_sv);
		953	TRANSFER (ta);
		954	}
		955
		956	static int
		957	api_save (SV *coro_sv, int new_save)
		958	{
		959	struct coro *coro = SvSTATE (coro_sv);
		960	int old_save = coro->save;
		961
		962	if (new_save >= 0)
		963	coro->save = new_save;
		964
		965	return old_save;
780	}	966	}
781		967
782	/** Coro ********************************************************************/	968	/** Coro ********************************************************************/
783		969
784	#define PRIO_MAX 3
785	#define PRIO_HIGH 1
786	#define PRIO_NORMAL 0
787	#define PRIO_LOW -1
788	#define PRIO_IDLE -3
789	#define PRIO_MIN -4
790
791	/* for Coro.pm */
792	static GV *coro_current, *coro_idle;
793	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
794	static int coro_nready;
795
796	static void	970	static void
797	coro_enq (pTHX_ SV *sv)	971	coro_enq (SV *coro_sv)
798	{	972	{
799	SV **xprio;
800	int prio;
801
802	if (SvTYPE (sv) != SVt_PVHV)
803	croak ("Coro::ready tried to enqueue something that is not a coroutine");
804
805	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
806	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
807
808	prio = prio > PRIO_MAX ? PRIO_MAX
809	: prio < PRIO_MIN ? PRIO_MIN
810	: prio;
811
812	av_push (coro_ready [prio - PRIO_MIN], sv);	973	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
813	coro_nready++;
814	}	974	}
815		975
816	static SV *	976	static SV *
817	coro_deq (pTHX_ int min_prio)	977	coro_deq (int min_prio)
818	{	978	{
819	int prio = PRIO_MAX - PRIO_MIN;	979	int prio = PRIO_MAX - PRIO_MIN;
820		980
821	min_prio -= PRIO_MIN;	981	min_prio -= PRIO_MIN;
822	if (min_prio < 0)	982	if (min_prio < 0)
823	min_prio = 0;	983	min_prio = 0;
824		984
825	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	985	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
826	if (av_len (coro_ready[prio]) >= 0)	986	if (AvFILLp (coro_ready [prio]) >= 0)
827	{
828	coro_nready--;
829	return av_shift (coro_ready[prio]);	987	return av_shift (coro_ready [prio]);
830	}
831		988
832	return 0;	989	return 0;
833	}	990	}
834		991
835	static void	992	static int
836	api_ready (SV *coro)	993	api_ready (SV *coro_sv)
837	{	994	{
838	dTHX;	995	struct coro *coro;
839		996
840	if (SvROK (coro))	997	if (SvROK (coro_sv))
841	coro = SvRV (coro);	998	coro_sv = SvRV (coro_sv);
		999
		1000	coro = SvSTATE (coro_sv);
		1001
		1002	if (coro->flags & CF_READY)
		1003	return 0;
		1004
		1005	coro->flags |= CF_READY;
842		1006
843	LOCK;	1007	LOCK;
844	coro_enq (aTHX_ SvREFCNT_inc (coro));	1008	coro_enq (SvREFCNT_inc (coro_sv));
		1009	++coro_nready;
845	UNLOCK;	1010	UNLOCK;
		1011
		1012	return 1;
		1013	}
		1014
		1015	static int
		1016	api_is_ready (SV *coro_sv)
		1017	{
		1018	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1019	}
		1020
		1021	static void
		1022	prepare_schedule (struct transfer_args *ta)
		1023	{
		1024	SV *prev_sv, *next_sv;
		1025
		1026	for (;;)
		1027	{
		1028	LOCK;
		1029	next_sv = coro_deq (PRIO_MIN);
		1030
		1031	/* nothing to schedule: call the idle handler */
		1032	if (!next_sv)
		1033	{
		1034	dSP;
		1035	UNLOCK;
		1036
		1037	ENTER;
		1038	SAVETMPS;
		1039
		1040	PUSHMARK (SP);
		1041	PUTBACK;
		1042	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1043
		1044	FREETMPS;
		1045	LEAVE;
		1046	continue;
		1047	}
		1048
		1049	ta->next = SvSTATE (next_sv);
		1050
		1051	/* cannot transfer to destroyed coros, skip and look for next */
		1052	if (ta->next->flags & CF_DESTROYED)
		1053	{
		1054	UNLOCK;
		1055	SvREFCNT_dec (next_sv);
		1056	/* coro_nready is already taken care of by destroy */
		1057	continue;
		1058	}
		1059
		1060	--coro_nready;
		1061	UNLOCK;
		1062	break;
		1063	}
		1064
		1065	/* free this only after the transfer */
		1066	prev_sv = SvRV (coro_current);
		1067	SvRV_set (coro_current, next_sv);
		1068	ta->prev = SvSTATE (prev_sv);
		1069
		1070	assert (ta->next->flags & CF_READY);
		1071	ta->next->flags &= ~CF_READY;
		1072
		1073	LOCK;
		1074	free_coro_mortal ();
		1075	coro_mortal = prev_sv;
		1076	UNLOCK;
		1077	}
		1078
		1079	static void
		1080	prepare_cede (struct transfer_args *ta)
		1081	{
		1082	api_ready (coro_current);
		1083	prepare_schedule (ta);
		1084	}
		1085
		1086	static int
		1087	prepare_cede_notself (struct transfer_args *ta)
		1088	{
		1089	if (coro_nready)
		1090	{
		1091	SV *prev = SvRV (coro_current);
		1092	prepare_schedule (ta);
		1093	api_ready (prev);
		1094	return 1;
		1095	}
		1096	else
		1097	return 0;
846	}	1098	}
847		1099
848	static void	1100	static void
849	api_schedule (void)	1101	api_schedule (void)
850	{	1102	{
851	dTHX;	1103	struct transfer_args ta;
852		1104
853	SV *prev, *next;	1105	prepare_schedule (&ta);
854		1106	TRANSFER (ta);
855	LOCK;
856
857	prev = SvRV (GvSV (coro_current));
858	next = coro_deq (aTHX_ PRIO_MIN);
859
860	if (!next)
861	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
862
863	/* free this only after the transfer */
864	coro_mortal = prev;
865	SV_CORO (prev, "Coro::schedule");
866
867	SvRV (GvSV (coro_current)) = next;
868
869	SV_CORO (next, "Coro::schedule");
870
871	UNLOCK;
872
873	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
874	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
875	}	1107	}
876		1108
877	static void	1109	static int
878	api_cede (void)	1110	api_cede (void)
879	{	1111	{
880	dTHX;	1112	struct transfer_args ta;
881		1113
882	LOCK;	1114	prepare_cede (&ta);
883	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
884	UNLOCK;
885		1115
886	api_schedule ();	1116	if (ta.prev != ta.next)
		1117	{
		1118	TRANSFER (ta);
		1119	return 1;
		1120	}
		1121	else
		1122	return 0;
		1123	}
		1124
		1125	static int
		1126	api_cede_notself (void)
		1127	{
		1128	struct transfer_args ta;
		1129
		1130	if (prepare_cede_notself (&ta))
		1131	{
		1132	TRANSFER (ta);
		1133	return 1;
		1134	}
		1135	else
		1136	return 0;
887	}	1137	}
888		1138
889	MODULE = Coro::State PACKAGE = Coro::State	1139	MODULE = Coro::State PACKAGE = Coro::State
890		1140
891	PROTOTYPES: ENABLE	1141	PROTOTYPES: DISABLE
892		1142
893	BOOT:	1143	BOOT:
894	{ /* {} necessary for stoopid perl-5.6.x */	1144	{
895	#ifdef USE_ITHREADS	1145	#ifdef USE_ITHREADS
896	MUTEX_INIT (&coro_mutex);	1146	MUTEX_INIT (&coro_mutex);
897	#endif	1147	#endif
		1148	BOOT_PAGESIZE;
898		1149
899	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
900	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
901	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1150	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
902		1151
903	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1152	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
904	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1153	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
905	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1154	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1155	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
906	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1156	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
907		1157
908	main_mainstack = PL_mainstack;	1158	main_mainstack = PL_mainstack;
909		1159
910	coroapi.ver = CORO_API_VERSION;	1160	coroapi.ver = CORO_API_VERSION;
911	coroapi.transfer = api_transfer;	1161	coroapi.transfer = api_transfer;
912	}
913		1162
914	Coro::State	1163	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
915	_newprocess(args)	1164	}
916	SV * args	1165
917	PROTOTYPE: $	1166	SV *
		1167	new (char *klass, ...)
918	CODE:	1168	CODE:
919	Coro__State coro;	1169	{
		1170	struct coro *coro;
		1171	HV *hv;
		1172	int i;
920		1173
921	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
922	croak ("Coro::State::_newprocess expects an arrayref");
923
924	Newz (0, coro, 1, struct coro);	1174	Newz (0, coro, 1, struct coro);
		1175	coro->args = newAV ();
		1176	coro->save = CORO_SAVE_ALL;
		1177	coro->flags = CF_NEW;
925		1178
926	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1179	hv = newHV ();
927	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1180	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
928	/*coro->stack = 0;*/	1181	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
929		1182
930	/* same as JMPENV_BOOTSTRAP */	1183	for (i = 1; i < items; i++)
931	/* we might be able to recycle start_env, but safe is safe */	1184	av_push (coro->args, newSVsv (ST (i)));
932	/*Zero(&coro->start_env, 1, JMPENV);*/	1185	}
933	coro->start_env.je_ret = -1;
934	coro->start_env.je_mustcatch = TRUE;
935
936	RETVAL = coro;
937	OUTPUT:	1186	OUTPUT:
938	RETVAL	1187	RETVAL
939		1188
		1189	int
		1190	save (SV *coro, int new_save = -1)
		1191	CODE:
		1192	RETVAL = api_save (coro, new_save);
		1193	OUTPUT:
		1194	RETVAL
		1195
940	void	1196	void
941	transfer(prev, next, flags)	1197	_set_stacklevel (...)
942	SV *prev	1198	ALIAS:
943	SV *next	1199	Coro::State::transfer = 1
944	int flags	1200	Coro::schedule = 2
945	PROTOTYPE: @	1201	Coro::cede = 3
		1202	Coro::cede_notself = 4
946	CODE:	1203	CODE:
947	PUTBACK;	1204	{
948	SV_CORO (next, "Coro::transfer");	1205	struct transfer_args ta;
949	SV_CORO (prev, "Coro::transfer");	1206
950	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1207	switch (ix)
951	SPAGAIN;	1208	{
		1209	case 0:
		1210	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1211	ta.next = 0;
		1212	break;
		1213
		1214	case 1:
		1215	if (items != 2)
		1216	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1217
		1218	prepare_transfer (&ta, ST (0), ST (1));
		1219	break;
		1220
		1221	case 2:
		1222	prepare_schedule (&ta);
		1223	break;
		1224
		1225	case 3:
		1226	prepare_cede (&ta);
		1227	break;
		1228
		1229	case 4:
		1230	if (!prepare_cede_notself (&ta))
		1231	XSRETURN_EMPTY;
		1232
		1233	break;
		1234	}
		1235
		1236	BARRIER;
		1237	TRANSFER (ta);
		1238
		1239	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1240	XSRETURN_YES;
		1241	}
		1242
		1243	bool
		1244	_destroy (SV *coro_sv)
		1245	CODE:
		1246	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
		1247	OUTPUT:
		1248	RETVAL
952		1249
953	void	1250	void
954	DESTROY(coro)
955	Coro::State coro
956	CODE:
957
958	if (coro->mainstack && coro->mainstack != main_mainstack)
959	{
960	struct coro temp;
961
962	PUTBACK;
963	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
964	LOAD (aTHX_ coro);
965	SPAGAIN;
966
967	destroy_stacks (aTHX);
968
969	LOAD ((&temp)); /* this will get rid of defsv etc.. */
970	SPAGAIN;
971
972	coro->mainstack = 0;
973	}
974
975	deallocate_stack (coro);
976	SvREFCNT_dec (coro->args);
977	Safefree (coro);
978
979	void
980	_exit(code)	1251	_exit (code)
981	int code	1252	int code
982	PROTOTYPE: $	1253	PROTOTYPE: $
983	CODE:	1254	CODE:
984	_exit (code);	1255	_exit (code);
985		1256
986	MODULE = Coro::State PACKAGE = Coro::Cont	1257	int
		1258	cctx_stacksize (int new_stacksize = 0)
		1259	CODE:
		1260	RETVAL = coro_stacksize;
		1261	if (new_stacksize)
		1262	coro_stacksize = new_stacksize;
		1263	OUTPUT:
		1264	RETVAL
987		1265
988	# this is slightly dirty (should expose a c-level api)	1266	int
		1267	cctx_count ()
		1268	CODE:
		1269	RETVAL = cctx_count;
		1270	OUTPUT:
		1271	RETVAL
989		1272
990	void	1273	int
991	yield(...)	1274	cctx_idle ()
992	PROTOTYPE: @	1275	CODE:
993	CODE:	1276	RETVAL = cctx_idle;
994	SV *yieldstack;	1277	OUTPUT:
995	SV *sv;	1278	RETVAL
996	AV *defav = GvAV (PL_defgv);
997	struct coro *prev, *next;
998
999	yieldstack = *hv_fetch (
1000	(HV *)SvRV (GvSV (coro_current)),
1001	"yieldstack", sizeof ("yieldstack") - 1,
1002	0
1003	);
1004
1005	/* set up @_ -- ugly */
1006	av_clear (defav);
1007	av_fill (defav, items - 1);
1008	while (items--)
1009	av_store (defav, items, SvREFCNT_inc (ST(items)));
1010
1011	sv = av_pop ((AV *)SvRV (yieldstack));
1012	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1013	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1014	SvREFCNT_dec (sv);
1015
1016	transfer (aTHX_ prev, next, 0);
1017		1279
1018	MODULE = Coro::State PACKAGE = Coro	1280	MODULE = Coro::State PACKAGE = Coro
1019		1281
1020	# this is slightly dirty (should expose a c-level api)
1021
1022	BOOT:	1282	BOOT:
1023	{	1283	{
1024	int i;	1284	int i;
		1285
1025	HV *stash = gv_stashpv ("Coro", TRUE);	1286	coro_stash = gv_stashpv ("Coro", TRUE);
1026		1287
1027	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1288	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1028	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1289	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1029	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1290	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1030	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1291	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1031	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1292	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1032	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1293	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1033		1294
1034	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1295	coro_current = get_sv ("Coro::current", FALSE);
1035	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1296	SvREADONLY_on (coro_current);
1036		1297
1037	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1298	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1038	coro_ready[i] = newAV ();	1299	coro_ready[i] = newAV ();
1039		1300
1040	{	1301	{
1041	SV *sv = perl_get_sv("Coro::API", 1);	1302	SV *sv = perl_get_sv("Coro::API", 1);
1042		1303
1043	coroapi.schedule = api_schedule;	1304	coroapi.schedule = api_schedule;
		1305	coroapi.save = api_save;
1044	coroapi.cede = api_cede;	1306	coroapi.cede = api_cede;
		1307	coroapi.cede_notself = api_cede_notself;
1045	coroapi.ready = api_ready;	1308	coroapi.ready = api_ready;
		1309	coroapi.is_ready = api_is_ready;
1046	coroapi.nready = &coro_nready;	1310	coroapi.nready = &coro_nready;
1047	coroapi.current = coro_current;	1311	coroapi.current = coro_current;
1048		1312
1049	GCoroAPI = &coroapi;	1313	GCoroAPI = &coroapi;
1050	sv_setiv(sv, (IV)&coroapi);	1314	sv_setiv (sv, (IV)&coroapi);
1051	SvREADONLY_on(sv);	1315	SvREADONLY_on (sv);
1052	}	1316	}
1053	}	1317	}
1054		1318
1055	#if !PERL_MICRO
1056
1057	void	1319	void
1058	ready(self)	1320	_set_current (SV *current)
1059	SV * self
1060	PROTOTYPE: $	1321	PROTOTYPE: $
1061	CODE:	1322	CODE:
1062	api_ready (self);	1323	SvREFCNT_dec (SvRV (coro_current));
1063		1324	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1064	#endif
1065		1325
1066	int	1326	int
		1327	prio (Coro::State coro, int newprio = 0)
		1328	ALIAS:
		1329	nice = 1
		1330	CODE:
		1331	{
		1332	RETVAL = coro->prio;
		1333
		1334	if (items > 1)
		1335	{
		1336	if (ix)
		1337	newprio = coro->prio - newprio;
		1338
		1339	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1340	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1341
		1342	coro->prio = newprio;
		1343	}
		1344	}
		1345	OUTPUT:
		1346	RETVAL
		1347
		1348	SV *
		1349	ready (SV *self)
		1350	PROTOTYPE: $
		1351	CODE:
		1352	RETVAL = boolSV (api_ready (self));
		1353	OUTPUT:
		1354	RETVAL
		1355
		1356	SV *
		1357	is_ready (SV *self)
		1358	PROTOTYPE: $
		1359	CODE:
		1360	RETVAL = boolSV (api_is_ready (self));
		1361	OUTPUT:
		1362	RETVAL
		1363
		1364	int
1067	nready(...)	1365	nready (...)
1068	PROTOTYPE:	1366	PROTOTYPE:
1069	CODE:	1367	CODE:
1070	RETVAL = coro_nready;	1368	RETVAL = coro_nready;
1071	OUTPUT:	1369	OUTPUT:
1072	RETVAL	1370	RETVAL
1073		1371
1074	void	1372	MODULE = Coro::State PACKAGE = Coro::AIO
1075	schedule(...)	1373
1076	PROTOTYPE:	1374	SV *
		1375	_get_state ()
1077	CODE:	1376	CODE:
1078	api_schedule ();
1079
1080	void
1081	cede(...)
1082	PROTOTYPE:
1083	CODE:
1084	api_cede ();
1085
1086	# and these are hacks
1087	SV *
1088	_aio_get_state ()
1089	CODE:
1090	{	1377	{
1091	struct {	1378	struct io_state *data;
1092	int errorno;
1093	int laststype;
1094	int laststatval;
1095	Stat_t statcache;
1096	} data;
1097		1379
		1380	RETVAL = newSV (sizeof (struct io_state));
		1381	data = (struct io_state *)SvPVX (RETVAL);
		1382	SvCUR_set (RETVAL, sizeof (struct io_state));
		1383	SvPOK_only (RETVAL);
		1384
1098	data.errorno = errno;	1385	data->errorno = errno;
1099	data.laststype = PL_laststype;	1386	data->laststype = PL_laststype;
1100	data.laststatval = PL_laststatval;	1387	data->laststatval = PL_laststatval;
1101	data.statcache = PL_statcache;	1388	data->statcache = PL_statcache;
1102
1103	RETVAL = newSVpvn ((char *)&data, sizeof data);
1104	}	1389	}
1105	OUTPUT:	1390	OUTPUT:
1106	RETVAL	1391	RETVAL
1107		1392
1108	void	1393	void
1109	_aio_set_state (char *data_)	1394	_set_state (char *data_)
1110	PROTOTYPE: $	1395	PROTOTYPE: $
1111	CODE:	1396	CODE:
1112	{	1397	{
1113	struct {	1398	struct io_state *data = (void *)data_;
1114	int errorno;
1115	int laststype;
1116	int laststatval;
1117	Stat_t statcache;
1118	} *data = (void *)data_;
1119		1399
1120	errno = data->errorno;	1400	errno = data->errorno;
1121	PL_laststype = data->laststype;	1401	PL_laststype = data->laststype;
1122	PL_laststatval = data->laststatval;	1402	PL_laststatval = data->laststatval;
1123	PL_statcache = data->statcache;	1403	PL_statcache = data->statcache;
1124	}	1404	}
		1405

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