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

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