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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.88 by root, Fri Nov 24 15:34:33 2006 UTC vs.
Revision 1.141 by root, Mon Jan 22 18:45:17 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	# 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 */
		74	#ifndef SvRV_set
		75	# define SvRV_set(s,v) SvRV(s) = (v)
		76	#endif
33		77
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	78	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	79	# undef STACKGUARD
36	#endif	80	#endif
37		81
38	#ifndef STACKGUARD	82	#ifndef STACKGUARD
39	# define STACKGUARD 0	83	# define STACKGUARD 0
40	#endif	84	#endif
41		85
42	#ifdef HAVE_MMAP	86	/* prefer perl internal functions over our own? */
43	# include <unistd.h>	87	#ifndef PREFER_PERL_FUNCTIONS
44	# include <sys/mman.h>	88	# define PREFER_PERL_FUNCTIONS 0
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	89	#endif
52	# include <limits.h>
53	# ifndef PAGESIZE
54	# define PAGESIZE pagesize
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif
60	#endif
61
62	#define SUB_INIT "Coro::State::initialize"
63		90
64	/* 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
65	* 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
66	* and should be unique. */	93	* and should be unique. */
		94	#define dSTACKLEVEL int stacklevel
67	#define dSTACKLEVEL void *stacklevel = &stacklevel	95	#define STACKLEVEL ((void *)&stacklevel)
68		96
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	97	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		98
71	#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))
72		108
73	#include "CoroAPI.h"	109	#include "CoroAPI.h"
74		110
75	#ifdef USE_ITHREADS	111	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	112	static perl_mutex coro_mutex;
…		…
79	#else	115	#else
80	# define LOCK (void)0	116	# define LOCK (void)0
81	# define UNLOCK (void)0	117	# define UNLOCK (void)0
82	#endif	118	#endif
83		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
84	static struct CoroAPI coroapi;	129	static struct CoroAPI coroapi;
85	static AV *main_mainstack; /* used to differentiate between $main and others */	130	static AV *main_mainstack; /* used to differentiate between $main and others */
86	static HV *coro_state_stash, *coro_stash;	131	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	132	static SV *coro_mortal; /* will be freed after next transfer */
88		133
89	/* this is actually not only the c stack but also c registers etc... */	134	static struct coro_cctx *cctx_first;
		135	static int cctx_count, cctx_idle;
		136
		137	/* this is a structure representing a c-level coroutine */
90	typedef struct {	138	typedef struct coro_cctx {
91	int refcnt; /* pointer reference counter */	139	struct coro_cctx *next;
92	int usecnt; /* shared by how many coroutines */
93	int gencnt; /* generation counter */
94		140
		141	/* the stack */
		142	void *sptr;
		143	ssize_t ssize; /* positive == mmap, otherwise malloc */
		144
		145	/* cpu state */
		146	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		147	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		148	JMPENV *top_env;
95	coro_context cctx;	149	coro_context cctx;
96		150
97	void *sptr;	151	int inuse;
98	long ssize; /* positive == mmap, otherwise malloc */
99	} coro_stack;
100		152
		153	#if USE_VALGRIND
		154	int valgrind_id;
		155	#endif
		156	} coro_cctx;
		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 */
101	struct coro {	166	struct coro {
102	/* the optional C context */	167	/* the c coroutine allocated to this perl coroutine, if any */
103	coro_stack *stack;	168	coro_cctx *cctx;
104	void *cursp;
105	int gencnt;
106
107	/* optionally saved, might be zero */
108	AV *defav;
109	SV *defsv;
110	SV *errsv;
111
112	/* saved global state not related to stacks */
113	U8 dowarn;
114	I32 in_eval;
115
116	/* the stacks and related info (callchain etc..) */
117	PERL_SI *curstackinfo;
118	AV *curstack;
119	AV *mainstack;
120	SV **stack_sp;
121	OP *op;
122	SV **curpad;
123	AV *comppad;
124	CV *compcv;
125	SV **stack_base;
126	SV **stack_max;
127	SV **tmps_stack;
128	I32 tmps_floor;
129	I32 tmps_ix;
130	I32 tmps_max;
131	I32 *markstack;
132	I32 *markstack_ptr;
133	I32 *markstack_max;
134	I32 *scopestack;
135	I32 scopestack_ix;
136	I32 scopestack_max;
137	ANY *savestack;
138	I32 savestack_ix;
139	I32 savestack_max;
140	OP **retstack;
141	I32 retstack_ix;
142	I32 retstack_max;
143	PMOP *curpm;
144	COP *curcop;
145	JMPENV *top_env;
146
147	/* coro process data */
148	int prio;
149		169
150	/* data associated with this coroutine (initial args) */	170	/* data associated with this coroutine (initial args) */
151	AV *args;	171	AV *args;
152	int refcnt;	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;
153	};	189	};
154		190
155	typedef struct coro *Coro__State;	191	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	192	typedef struct coro *Coro__State_or_hashref;
157		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
158	static AV *	210	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	211	coro_clone_padlist (CV *cv)
160	{	212	{
161	AV *padlist = CvPADLIST (cv);	213	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	214	AV *newpadlist, *newpad;
163		215
164	newpadlist = newAV ();	216	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	217	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	218	#if PERL_VERSION_ATLEAST (5,9,0)
		219	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		220	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	221	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	222	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	223	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	224	--AvFILLp (padlist);
173		225
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	226	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
176		228
177	return newpadlist;	229	return newpadlist;
178	}	230	}
179		231
180	static void	232	static void
181	free_padlist (pTHX_ AV *padlist)	233	free_padlist (AV *padlist)
182	{	234	{
183	/* may be during global destruction */	235	/* may be during global destruction */
184	if (SvREFCNT (padlist))	236	if (SvREFCNT (padlist))
185	{	237	{
186	I32 i = AvFILLp (padlist);	238	I32 i = AvFILLp (padlist);
…		…
207	AV *padlist;	259	AV *padlist;
208	AV *av = (AV *)mg->mg_obj;	260	AV *av = (AV *)mg->mg_obj;
209		261
210	/* casting is fun. */	262	/* casting is fun. */
211	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	263	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212	free_padlist (aTHX_ padlist);	264	free_padlist (padlist);
213		265
214	SvREFCNT_dec (av);	266	SvREFCNT_dec (av);
215		267
216	return 0;	268	return 0;
217	}	269	}
218		270
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	271	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		272
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	273	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		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
223	/* the next two functions merely cache the padlists */	282	/* the next two functions merely cache the padlists */
224	static void	283	static void
225	get_padlist (pTHX_ CV *cv)	284	get_padlist (CV *cv)
226	{	285	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	286	MAGIC *mg = CORO_MAGIC (cv);
		287	AV *av;
228		288
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	289	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	290	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	291	else
232	{	292	{
233	#if 0	293	#if PREFER_PERL_FUNCTIONS
234	/* this should work - but it doesn't :( */	294	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	295	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	296	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	297	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	298	SvREFCNT_dec (cp);
239	#else	299	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	300	CvPADLIST (cv) = coro_clone_padlist (cv);
241	#endif	301	#endif
242	}	302	}
243	}	303	}
244		304
245	static void	305	static void
246	put_padlist (pTHX_ CV *cv)	306	put_padlist (CV *cv)
247	{	307	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	308	MAGIC *mg = CORO_MAGIC (cv);
		309	AV *av;
249		310
250	if (!mg)	311	if (!mg)
251	{	312	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	313	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	314	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	315	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	316	mg->mg_obj = (SV *)newAV ();
256	}	317	}
257		318
258	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);
259	}	325	}
		326
		327	/** load & save, init *******************************************************/
260		328
261	#define SB do {	329	#define SB do {
262	#define SE } while (0)	330	#define SE } while (0)
263		331
264	#define LOAD(state) load_state(aTHX_ (state));
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
266
267	#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
268		333
269	static void	334	static void
270	load_state(pTHX_ Coro__State c)	335	load_perl (Coro__State c)
271	{	336	{
272	PL_dowarn = c->dowarn;	337	#define VAR(name,type) PL_ ## name = c->name;
273	PL_in_eval = c->in_eval;	338	# include "state.h"
274		339	#undef VAR
275	PL_curstackinfo = c->curstackinfo;
276	PL_curstack = c->curstack;
277	PL_mainstack = c->mainstack;
278	PL_stack_sp = c->stack_sp;
279	PL_op = c->op;
280	PL_curpad = c->curpad;
281	PL_comppad = c->comppad;
282	PL_compcv = c->compcv;
283	PL_stack_base = c->stack_base;
284	PL_stack_max = c->stack_max;
285	PL_tmps_stack = c->tmps_stack;
286	PL_tmps_floor = c->tmps_floor;
287	PL_tmps_ix = c->tmps_ix;
288	PL_tmps_max = c->tmps_max;
289	PL_markstack = c->markstack;
290	PL_markstack_ptr = c->markstack_ptr;
291	PL_markstack_max = c->markstack_max;
292	PL_scopestack = c->scopestack;
293	PL_scopestack_ix = c->scopestack_ix;
294	PL_scopestack_max = c->scopestack_max;
295	PL_savestack = c->savestack;
296	PL_savestack_ix = c->savestack_ix;
297	PL_savestack_max = c->savestack_max;
298	#if PERL_VERSION < 9
299	PL_retstack = c->retstack;
300	PL_retstack_ix = c->retstack_ix;
301	PL_retstack_max = c->retstack_max;
302	#endif
303	PL_curpm = c->curpm;
304	PL_curcop = c->curcop;
305	PL_top_env = c->top_env;
306		340
307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	341	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	342	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
309	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	}
310		355
311	{	356	{
312	dSP;	357	dSP;
313	CV *cv;	358	CV *cv;
314		359
315	/* now do the ugly restore mess */	360	/* now do the ugly restore mess */
316	while ((cv = (CV *)POPs))	361	while ((cv = (CV *)POPs))
317	{	362	{
318	AV *padlist = (AV *)POPs;
319
320	if (padlist)
321	{
322	put_padlist (aTHX_ cv); /* mark this padlist as available */	363	put_padlist (cv); /* mark this padlist as available */
323	CvPADLIST(cv) = padlist;	364	CvDEPTH (cv) = PTR2IV (POPs);
324	}	365	CvPADLIST (cv) = (AV *)POPs;
325
326	++CvDEPTH(cv);
327	}	366	}
328		367
329	PUTBACK;	368	PUTBACK;
330	}	369	}
331	}	370	}
332		371
333	static void	372	static void
334	save_state(pTHX_ Coro__State c, int flags)	373	save_perl (Coro__State c)
335	{	374	{
336	{	375	{
337	dSP;	376	dSP;
338	I32 cxix = cxstack_ix;	377	I32 cxix = cxstack_ix;
339	PERL_CONTEXT *ccstk = cxstack;	378	PERL_CONTEXT *ccstk = cxstack;
…		…
342	/*	381	/*
343	* the worst thing you can imagine happens first - we have to save	382	* the worst thing you can imagine happens first - we have to save
344	* (and reinitialize) all cv's in the whole callchain :(	383	* (and reinitialize) all cv's in the whole callchain :(
345	*/	384	*/
346		385
		386	EXTEND (SP, 3 + 1);
347	PUSHs (Nullsv);	387	PUSHs (Nullsv);
348	/* this loop was inspired by pp_caller */	388	/* this loop was inspired by pp_caller */
349	for (;;)	389	for (;;)
350	{	390	{
351	while (cxix >= 0)	391	while (cxix >= 0)
352	{	392	{
353	PERL_CONTEXT *cx = &ccstk[cxix--];	393	PERL_CONTEXT *cx = &ccstk[cxix--];
354		394
355	if (CxTYPE(cx) == CXt_SUB)	395	if (CxTYPE (cx) == CXt_SUB)
356	{	396	{
357	CV *cv = cx->blk_sub.cv;	397	CV *cv = cx->blk_sub.cv;
		398
358	if (CvDEPTH(cv))	399	if (CvDEPTH (cv))
359	{	400	{
360	EXTEND (SP, CvDEPTH(cv)*2);	401	EXTEND (SP, 3);
361
362	while (--CvDEPTH(cv))
363	{
364	/* this tells the restore code to increment CvDEPTH */
365	PUSHs (Nullsv);
366	PUSHs ((SV *)cv);
367	}
368
369	PUSHs ((SV *)CvPADLIST(cv));	402	PUSHs ((SV *)CvPADLIST (cv));
		403	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
370	PUSHs ((SV *)cv);	404	PUSHs ((SV *)cv);
371		405
		406	CvDEPTH (cv) = 0;
372	get_padlist (aTHX_ cv);	407	get_padlist (cv);
373	}	408	}
374	}	409	}
375	#ifdef CXt_FORMAT
376	else if (CxTYPE(cx) == CXt_FORMAT)
377	{
378	/* I never used formats, so how should I know how these are implemented? */
379	/* my bold guess is as a simple, plain sub... */
380	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381	}
382	#endif
383	}	410	}
384		411
385	if (top_si->si_type == PERLSI_MAIN)	412	if (top_si->si_type == PERLSI_MAIN)
386	break;	413	break;
387		414
…		…
391	}	418	}
392		419
393	PUTBACK;	420	PUTBACK;
394	}	421	}
395		422
396	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	423	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	424	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
398	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	425	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		426	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
399		427
400	c->dowarn = PL_dowarn;	428	#define VAR(name,type)c->name = PL_ ## name;
401	c->in_eval = PL_in_eval;	429	# include "state.h"
402		430	#undef VAR
403	c->curstackinfo = PL_curstackinfo;
404	c->curstack = PL_curstack;
405	c->mainstack = PL_mainstack;
406	c->stack_sp = PL_stack_sp;
407	c->op = PL_op;
408	c->curpad = PL_curpad;
409	c->comppad = PL_comppad;
410	c->compcv = PL_compcv;
411	c->stack_base = PL_stack_base;
412	c->stack_max = PL_stack_max;
413	c->tmps_stack = PL_tmps_stack;
414	c->tmps_floor = PL_tmps_floor;
415	c->tmps_ix = PL_tmps_ix;
416	c->tmps_max = PL_tmps_max;
417	c->markstack = PL_markstack;
418	c->markstack_ptr = PL_markstack_ptr;
419	c->markstack_max = PL_markstack_max;
420	c->scopestack = PL_scopestack;
421	c->scopestack_ix = PL_scopestack_ix;
422	c->scopestack_max = PL_scopestack_max;
423	c->savestack = PL_savestack;
424	c->savestack_ix = PL_savestack_ix;
425	c->savestack_max = PL_savestack_max;
426	#if PERL_VERSION < 9
427	c->retstack = PL_retstack;
428	c->retstack_ix = PL_retstack_ix;
429	c->retstack_max = PL_retstack_max;
430	#endif
431	c->curpm = PL_curpm;
432	c->curcop = PL_curcop;
433	c->top_env = PL_top_env;
434	}	431	}
435		432
436	/*	433	/*
437	* allocate various perl stacks. This is an exact copy	434	* allocate various perl stacks. This is an exact copy
438	* of perl.c:init_stacks, except that it uses less memory	435	* of perl.c:init_stacks, except that it uses less memory
439	* on the (sometimes correct) assumption that coroutines do	436	* on the (sometimes correct) assumption that coroutines do
440	* not usually need a lot of stackspace.	437	* not usually need a lot of stackspace.
441	*/	438	*/
		439	#if PREFER_PERL_FUNCTIONS
		440	# define coro_init_stacks init_stacks
		441	#else
442	static void	442	static void
443	coro_init_stacks (pTHX)	443	coro_init_stacks ()
444	{	444	{
445	LOCK;
446
447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	445	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
448	PL_curstackinfo->si_type = PERLSI_MAIN;	446	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	447	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	448	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		449
452	PL_stack_base = AvARRAY(PL_curstack);	450	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	451	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	452	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		453
456	New(50,PL_tmps_stack,96,SV*);	454	New(50,PL_tmps_stack,128,SV*);
457	PL_tmps_floor = -1;	455	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	456	PL_tmps_ix = -1;
459	PL_tmps_max = 96;	457	PL_tmps_max = 128;
460		458
461	New(54,PL_markstack,16,I32);	459	New(54,PL_markstack,32,I32);
462	PL_markstack_ptr = PL_markstack;	460	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 16;	461	PL_markstack_max = PL_markstack + 32;
464		462
465	#ifdef SET_MARK_OFFSET	463	#ifdef SET_MARK_OFFSET
466	SET_MARK_OFFSET;	464	SET_MARK_OFFSET;
467	#endif	465	#endif
468		466
469	New(54,PL_scopestack,16,I32);	467	New(54,PL_scopestack,32,I32);
470	PL_scopestack_ix = 0;	468	PL_scopestack_ix = 0;
471	PL_scopestack_max = 16;	469	PL_scopestack_max = 32;
472		470
473	New(54,PL_savestack,96,ANY);	471	New(54,PL_savestack,64,ANY);
474	PL_savestack_ix = 0;	472	PL_savestack_ix = 0;
475	PL_savestack_max = 96;	473	PL_savestack_max = 64;
476		474
477	#if PERL_VERSION < 9	475	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,8,OP*);	476	New(54,PL_retstack,16,OP*);
479	PL_retstack_ix = 0;	477	PL_retstack_ix = 0;
480	PL_retstack_max = 8;	478	PL_retstack_max = 16;
481	#endif	479	#endif
482
483	UNLOCK;
484	}	480	}
		481	#endif
485		482
486	/*	483	/*
487	* destroy the stacks, the callchain etc...	484	* destroy the stacks, the callchain etc...
488	*/	485	*/
489	static void	486	static void
490	destroy_stacks(pTHX)	487	coro_destroy_stacks ()
491	{	488	{
492	if (!IN_DESTRUCT)	489	if (!IN_DESTRUCT)
493	{	490	{
494	/* is this ugly, I ask? */	491	/* restore all saved variables and stuff */
495	LEAVE_SCOPE (0);	492	LEAVE_SCOPE (0);
		493	assert (PL_tmps_floor == -1);
496		494
497	/* sure it is, but more important: is it correct?? :/ */	495	/* free all temporaries */
498	FREETMPS;	496	FREETMPS;
		497	assert (PL_tmps_ix == -1);
499		498
		499	/* unwind all extra stacks */
500	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	500	POPSTACK_TO (PL_mainstack);
		501
		502	/* unwind main stack */
		503	dounwind (-1);
501	}	504	}
502		505
503	while (PL_curstackinfo->si_next)	506	while (PL_curstackinfo->si_next)
504	PL_curstackinfo = PL_curstackinfo->si_next;	507	PL_curstackinfo = PL_curstackinfo->si_next;
505		508
506	while (PL_curstackinfo)	509	while (PL_curstackinfo)
507	{	510	{
508	PERL_SI *p = PL_curstackinfo->si_prev;	511	PERL_SI *p = PL_curstackinfo->si_prev;
509		512
510	{ /*D*//*remove*/
511	dSP;
512	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513	PUTBACK; /* possibly superfluous */
514	}
515
516	if (!IN_DESTRUCT)	513	if (!IN_DESTRUCT)
517	{
518	dounwind (-1);/*D*//*remove*/
519	SvREFCNT_dec (PL_curstackinfo->si_stack);	514	SvREFCNT_dec (PL_curstackinfo->si_stack);
520	}
521		515
522	Safefree (PL_curstackinfo->si_cxstack);	516	Safefree (PL_curstackinfo->si_cxstack);
523	Safefree (PL_curstackinfo);	517	Safefree (PL_curstackinfo);
524	PL_curstackinfo = p;	518	PL_curstackinfo = p;
525	}	519	}
526		520
527	Safefree (PL_tmps_stack);	521	Safefree (PL_tmps_stack);
528	Safefree (PL_markstack);	522	Safefree (PL_markstack);
529	Safefree (PL_scopestack);	523	Safefree (PL_scopestack);
530	Safefree (PL_savestack);	524	Safefree (PL_savestack);
531	#if PERL_VERSION < 9	525	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree (PL_retstack);	526	Safefree (PL_retstack);
533	#endif	527	#endif
534	}	528	}
535		529
536	static void	530	/** coroutine stack handling ************************************************/
537	allocate_stack (Coro__State ctx, int alloc)
538	{
539	coro_stack *stack;
540		531
541	New (0, stack, 1, coro_stack);
542
543	stack->refcnt = 1;
544	stack->usecnt = 1;
545	stack->gencnt = ctx->gencnt = 0;
546
547	if (alloc)
548	{
549	#if HAVE_MMAP
550	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
551	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
552	if (stack->sptr != (void *)-1)
553	{
554	# if STACKGUARD
555	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
556	# endif
557	}
558	else
559	#endif
560	{
561	stack->ssize = - (STACKSIZE * (long)sizeof (long));
562	New (0, stack->sptr, STACKSIZE, long);
563	}
564	}
565	else
566	stack->sptr = 0;
567
568	ctx->stack = stack;
569	}
570
571	static void	532	static void
572	deallocate_stack (Coro__State ctx)	533	setup_coro (struct coro *coro)
573	{
574	coro_stack *stack = ctx->stack;
575
576	ctx->stack = 0;
577
578	if (stack)
579	{
580	if (!--stack->refcnt)
581	{
582	#ifdef HAVE_MMAP
583	if (stack->ssize > 0 && stack->sptr)
584	munmap (stack->sptr, stack->ssize);
585	else
586	#endif
587	Safefree (stack->sptr);
588
589	Safefree (stack);
590	}
591	else if (ctx->gencnt == stack->gencnt)
592	--stack->usecnt;
593	}
594	}
595
596	static void
597	setup_coro (void *arg)
598	{	534	{
599	/*	535	/*
600	* emulate part of the perl startup here.	536	* emulate part of the perl startup here.
601	*/	537	*/
602	dTHX;	538
		539	coro_init_stacks ();
		540
		541	PL_curcop = &PL_compiling;
		542	PL_in_eval = EVAL_NULL;
		543	PL_curpm = 0;
		544	PL_localizing = 0;
		545	PL_dirty = 0;
		546	PL_restartop = 0;
		547
		548	{
		549	dSP;
		550	LOGOP myop;
		551
		552	SvREFCNT_dec (GvAV (PL_defgv));
		553	GvAV (PL_defgv) = coro->args; coro->args = 0;
		554
		555	Zero (&myop, 1, LOGOP);
		556	myop.op_next = Nullop;
		557	myop.op_flags = OPf_WANT_VOID;
		558
		559	PUSHMARK (SP);
		560	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		561	PUTBACK;
		562	PL_op = (OP *)&myop;
		563	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		564	SPAGAIN;
		565	}
		566
		567	ENTER; /* necessary e.g. for dounwind */
		568	}
		569
		570	static void
		571	free_coro_mortal ()
		572	{
		573	if (coro_mortal)
		574	{
		575	SvREFCNT_dec (coro_mortal);
		576	coro_mortal = 0;
		577	}
		578	}
		579
		580	/* inject a fake call to Coro::State::_cctx_init into the execution */
		581	static void NOINLINE
		582	prepare_cctx (coro_cctx *cctx)
		583	{
603	dSP;	584	dSP;
604	Coro__State ctx = (Coro__State)arg;	585	LOGOP myop;
605	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
606		586
607	coro_init_stacks (aTHX);	587	Zero (&myop, 1, LOGOP);
608	/*PL_curcop = 0;*/	588	myop.op_next = PL_op;
609	/*PL_in_eval = PL_in_eval;*/ /* inherit */	589	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
610	SvREFCNT_dec (GvAV (PL_defgv));
611	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
612		590
		591	PUSHMARK (SP);
		592	EXTEND (SP, 2);
		593	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		594	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		595	PUTBACK;
		596	PL_op = (OP *)&myop;
		597	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
613	SPAGAIN;	598	SPAGAIN;
614
615	if (ctx->stack)
616	{
617	ctx->cursp = 0;
618
619	PUSHMARK(SP);
620	PUTBACK;
621	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
622
623	if (SvTRUE (ERRSV))
624	croak (NULL);
625	else
626	croak ("FATAL: CCTXT coroutine returned!");
627	}
628	else
629	{
630	UNOP myop;
631
632	Zero(&myop, 1, UNOP);
633	myop.op_next = Nullop;
634	myop.op_flags = OPf_WANT_VOID;
635
636	PL_op = (OP *)&myop;
637
638	PUSHMARK(SP);
639	XPUSHs (sub_init);
640	/*
641	* the next line is slightly wrong, as PL_op->op_next
642	* is actually being executed so we skip the first op.
643	* that doesn't matter, though, since it is only
644	* pp_nextstate and we never return...
645	* ah yes, and I don't care anyways ;)
646	*/
647	PUTBACK;
648	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
649	SPAGAIN;
650
651	ENTER; /* necessary e.g. for dounwind */
652	}
653	}	599	}
654		600
655	static void	601	static void
656	continue_coro (void *arg)	602	coro_run (void *arg)
657	{	603	{
		604	/* coro_run is the alternative tail of transfer(), so unlock here. */
		605	UNLOCK;
		606
658	/*	607	/*
659	* this is a _very_ stripped down perl interpreter ;)	608	* this is a _very_ stripped down perl interpreter ;)
660	*/	609	*/
661	dTHX;
662	Coro__State ctx = (Coro__State)arg;
663
664	PL_top_env = &PL_start_env;	610	PL_top_env = &PL_start_env;
665		611
666	ctx->cursp = 0;	612	/* inject call to cctx_init */
667	PL_op = PL_op->op_next;	613	prepare_cctx ((coro_cctx *)arg);
668	CALLRUNOPS(aTHX);
669		614
		615	/* somebody will hit me for both perl_run and PL_restartop */
		616	PL_restartop = PL_op;
		617	perl_run (PL_curinterp);
		618
		619	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
670	abort ();	620	abort ();
671	}	621	}
672		622
		623	static coro_cctx *
		624	cctx_new ()
		625	{
		626	coro_cctx *cctx;
		627
		628	++cctx_count;
		629
		630	Newz (0, cctx, 1, coro_cctx);
		631
		632	#if HAVE_MMAP
		633
		634	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		635	/* mmap supposedly does allocate-on-write for us */
		636	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		637
		638	if (cctx->sptr != (void *)-1)
		639	{
		640	# if STACKGUARD
		641	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		642	# endif
		643	REGISTER_STACK (
		644	cctx,
		645	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		646	cctx->ssize + (char *)cctx->sptr
		647	);
		648
		649	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		650	}
		651	else
		652	#endif
		653	{
		654	cctx->ssize = -STACKSIZE * (long)sizeof (long);
		655	New (0, cctx->sptr, STACKSIZE, long);
		656
		657	if (!cctx->sptr)
		658	{
		659	perror ("FATAL: unable to allocate stack for coroutine");
		660	_exit (EXIT_FAILURE);
		661	}
		662
		663	REGISTER_STACK (
		664	cctx,
		665	(char *)cctx->sptr,
		666	(char *)cctx->sptr - cctx->ssize
		667	);
		668
		669	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, -cctx->ssize);
		670	}
		671
		672	return cctx;
		673	}
		674
		675	static void
		676	cctx_destroy (coro_cctx *cctx)
		677	{
		678	if (!cctx)
		679	return;
		680
		681	--cctx_count;
		682
		683	#if USE_VALGRIND
		684	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		685	#endif
		686
		687	#if HAVE_MMAP
		688	if (cctx->ssize > 0)
		689	munmap (cctx->sptr, cctx->ssize);
		690	else
		691	#endif
		692	Safefree (cctx->sptr);
		693
		694	Safefree (cctx);
		695	}
		696
		697	static coro_cctx *
		698	cctx_get ()
		699	{
		700	coro_cctx *cctx;
		701
		702	if (cctx_first)
		703	{
		704	cctx = cctx_first;
		705	cctx_first = cctx->next;
		706	--cctx_idle;
		707	}
		708	else
		709	{
		710	cctx = cctx_new ();
		711	PL_op = PL_op->op_next;
		712	}
		713
		714	return cctx;
		715	}
		716
		717	static void
		718	cctx_put (coro_cctx *cctx)
		719	{
		720	/* free another cctx if overlimit */
		721	if (cctx_idle >= MAX_IDLE_CCTX)
		722	{
		723	coro_cctx *first = cctx_first;
		724	cctx_first = first->next;
		725	--cctx_idle;
		726
		727	assert (!first->inuse);
		728	cctx_destroy (first);
		729	}
		730
		731	++cctx_idle;
		732	cctx->next = cctx_first;
		733	cctx_first = cctx;
		734	}
		735
		736	/** coroutine switching *****************************************************/
		737
673	/* never call directly, always through the coro_state_transfer global variable */	738	/* never call directly, always through the coro_state_transfer global variable */
674	static void	739	static void NOINLINE
675	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	740	transfer (struct coro *prev, struct coro *next)
676	{	741	{
677	dSTACKLEVEL;	742	dSTACKLEVEL;
678		743
		744	/* sometimes transfer is only called to set idle_sp */
		745	if (!next)
		746	{
		747	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		748	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		749	}
679	if (prev != next)	750	else if (prev != next)
680	{	751	{
681	/* has this coro been created yet? */	752	coro_cctx *prev__cctx;
682	if (next->mainstack)	753
		754	if (prev->flags & CF_NEW)
683	{	755	{
684	LOCK;	756	/* create a new empty context */
685	SAVE (prev, flags);	757	Newz (0, prev->cctx, 1, coro_cctx);
686	LOAD (next);	758	prev->cctx->inuse = 1;
687	UNLOCK;	759	prev->flags &= ~CF_NEW;
688		760	prev->flags |= CF_RUNNING;
689	/* mark this state as in-use */
690	next->mainstack = 0;
691	next->tmps_ix = -2;
692
693	/* stacklevel changed? if yes, grab the stack for us! */
694	if (flags & TRANSFER_SAVE_CCTXT)
695	{
696	if (!prev->stack)
697	allocate_stack (prev, 0);
698	else if (prev->cursp != stacklevel
699	&& prev->stack->usecnt > 1)
700	{
701	prev->gencnt = ++prev->stack->gencnt;
702	prev->stack->usecnt = 1;
703	}
704
705	/* has our stack been invalidated? */
706	if (next->stack && next->stack->gencnt != next->gencnt)
707	{
708	deallocate_stack (next);
709	allocate_stack (next, 1);
710	coro_create (&(next->stack->cctx),
711	continue_coro, (void *)next,
712	next->stack->sptr, labs (next->stack->ssize));
713	}
714
715	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716	prev->cursp = stacklevel;
717	/* don't add any code here */
718	}
719	else
720	next->cursp = stacklevel;
721	}	761	}
722	else if (next->tmps_ix == -2)	762
723	croak ("tried to transfer to running coroutine");	763	/*TODO: must not croak here */
		764	if (!prev->flags & CF_RUNNING)
		765	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		766
		767	if (next->flags & CF_RUNNING)
		768	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		769
		770	if (next->flags & CF_DESTROYED)
		771	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		772
		773	prev->flags &= ~CF_RUNNING;
		774	next->flags |= CF_RUNNING;
		775
		776	LOCK;
		777
		778	if (next->flags & CF_NEW)
		779	{
		780	/* need to start coroutine */
		781	next->flags &= ~CF_NEW;
		782	/* first get rid of the old state */
		783	save_perl (prev);
		784	/* setup coroutine call */
		785	setup_coro (next);
		786	/* need a new stack */
		787	assert (!next->cctx);
		788	}
724	else	789	else
725	{	790	{
726	LOCK;	791	/* coroutine already started */
727	SAVE (prev, -1); /* first get rid of the old state */	792	save_perl (prev);
728	UNLOCK;	793	load_perl (next);
729
730	/* create the coroutine for the first time */
731	if (flags & TRANSFER_SAVE_CCTXT)
732	{
733	if (!prev->stack)
734	allocate_stack (prev, 0);
735
736	/* the new coroutine starts with start_env again */
737	PL_top_env = &PL_start_env;
738
739	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
740	{
741	setup_coro (next);
742	next->cursp = stacklevel;
743
744	prev->stack->refcnt++;
745	prev->stack->usecnt++;
746	next->stack = prev->stack;
747	next->gencnt = prev->gencnt;
748	}
749	else
750	{
751	assert (!next->stack);
752	allocate_stack (next, 1);
753	coro_create (&(next->stack->cctx),
754	setup_coro, (void *)next,
755	next->stack->sptr, labs (next->stack->ssize));
756	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
757	prev->cursp = stacklevel;
758	/* don't add any code here */
759	}
760	}
761	else
762	{
763	setup_coro (next);
764	next->cursp = stacklevel;
765	}
766	}	794	}
767	}
768		795
769	LOCK;	796	prev__cctx = prev->cctx;
770	if (coro_mortal)	797
771	{	798	/* possibly "free" the cctx */
772	SvREFCNT_dec (coro_mortal);	799	if (prev__cctx->idle_sp == STACKLEVEL)
		800	{
		801	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		802	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		803
		804	prev->cctx = 0;
		805
		806	cctx_put (prev__cctx);
		807	prev__cctx->inuse = 0;
		808	}
		809
		810	if (!next->cctx)
		811	{
		812	next->cctx = cctx_get ();
		813	assert (!next->cctx->inuse);
		814	next->cctx->inuse = 1;
		815	}
		816
		817	if (prev__cctx != next->cctx)
		818	{
		819	prev__cctx->top_env = PL_top_env;
		820	PL_top_env = next->cctx->top_env;
		821	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		822	}
		823
773	coro_mortal = 0;	824	free_coro_mortal ();
774	}
775	UNLOCK;	825	UNLOCK;
		826	}
776	}	827	}
777		828
778	/* use this function pointer to call the above function */	829	struct transfer_args
779	/* this is done to increase chances of the compiler not inlining the call */	830	{
780	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	831	struct coro *prev, *next;
		832	};
781		833
		834	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
		835
		836	/** high level stuff ********************************************************/
		837
782	static void	838	static int
783	coro_state_destroy (struct coro *coro)	839	coro_state_destroy (struct coro *coro)
784	{	840	{
785	if (coro->refcnt--)	841	if (coro->flags & CF_DESTROYED)
786	return;	842	return 0;
		843
		844	coro->flags |= CF_DESTROYED;
		845
		846	if (coro->flags & CF_READY)
		847	{
		848	/* reduce nready, as destroying a ready coro effectively unreadies it */
		849	/* alternative: look through all ready queues and remove the coro */
		850	LOCK;
		851	--coro_nready;
		852	UNLOCK;
		853	}
		854	else
		855	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
787		856
788	if (coro->mainstack && coro->mainstack != main_mainstack)	857	if (coro->mainstack && coro->mainstack != main_mainstack)
789	{	858	{
790	struct coro temp;	859	struct coro temp;
791		860
792	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	861	assert (!(coro->flags & CF_RUNNING));
793	LOAD (aTHX_ coro);
794		862
		863	Zero (&temp, 1, struct coro);
		864	temp.save = CORO_SAVE_ALL;
		865
		866	if (coro->flags & CF_RUNNING)
		867	croak ("FATAL: tried to destroy currently running coroutine");
		868
		869	save_perl (&temp);
		870	load_perl (coro);
		871
795	destroy_stacks (aTHX);	872	coro_destroy_stacks ();
796		873
797	LOAD ((&temp)); /* this will get rid of defsv etc.. */	874	load_perl (&temp); /* this will get rid of defsv etc.. */
798		875
799	coro->mainstack = 0;	876	coro->mainstack = 0;
800	}	877	}
801		878
802	deallocate_stack (coro);	879	cctx_destroy (coro->cctx);
803	SvREFCNT_dec (coro->args);	880	SvREFCNT_dec (coro->args);
804	Safefree (coro);	881
		882	return 1;
805	}	883	}
806		884
807	static int	885	static int
808	coro_state_clear (SV *sv, MAGIC *mg)	886	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
809	{	887	{
810	struct coro *coro = (struct coro *)mg->mg_ptr;	888	struct coro *coro = (struct coro *)mg->mg_ptr;
811	mg->mg_ptr = 0;	889	mg->mg_ptr = 0;
812		890
		891	if (--coro->refcnt < 0)
		892	{
813	coro_state_destroy (coro);	893	coro_state_destroy (coro);
		894	Safefree (coro);
		895	}
814		896
815	return 0;	897	return 0;
816	}	898	}
817		899
818	static int	900	static int
819	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	901	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
820	{	902	{
821	struct coro *coro = (struct coro *)mg->mg_ptr;	903	struct coro *coro = (struct coro *)mg->mg_ptr;
822		904
823	++coro->refcnt;	905	++coro->refcnt;
824		906
825	return 0;	907	return 0;
826	}	908	}
827		909
828	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	910	static MGVTBL coro_state_vtbl = {
		911	0, 0, 0, 0,
		912	coro_state_free,
		913	0,
		914	#ifdef MGf_DUP
		915	coro_state_dup,
		916	#else
		917	# define MGf_DUP 0
		918	#endif
		919	};
829		920
830	static struct coro *	921	static struct coro *
831	SvSTATE (SV *coro)	922	SvSTATE (SV *coro)
832	{	923	{
833	HV *stash;	924	HV *stash;
…		…
848	assert (mg->mg_type == PERL_MAGIC_ext);	939	assert (mg->mg_type == PERL_MAGIC_ext);
849	return (struct coro *)mg->mg_ptr;	940	return (struct coro *)mg->mg_ptr;
850	}	941	}
851		942
852	static void	943	static void
		944	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		945	{
		946	ta->prev = SvSTATE (prev_sv);
		947	ta->next = SvSTATE (next_sv);
		948	}
		949
		950	static void
853	api_transfer (pTHX_ SV *prev, SV *next, int flags)	951	api_transfer (SV *prev_sv, SV *next_sv)
854	{	952	{
855	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	953	struct transfer_args ta;
		954
		955	prepare_transfer (&ta, prev_sv, next_sv);
		956	TRANSFER (ta);
		957	}
		958
		959	static int
		960	api_save (SV *coro_sv, int new_save)
		961	{
		962	struct coro *coro = SvSTATE (coro_sv);
		963	int old_save = coro->save;
		964
		965	if (new_save >= 0)
		966	coro->save = new_save;
		967
		968	return old_save;
856	}	969	}
857		970
858	/** Coro ********************************************************************/	971	/** Coro ********************************************************************/
859		972
860	#define PRIO_MAX 3
861	#define PRIO_HIGH 1
862	#define PRIO_NORMAL 0
863	#define PRIO_LOW -1
864	#define PRIO_IDLE -3
865	#define PRIO_MIN -4
866
867	/* for Coro.pm */
868	static GV *coro_current, *coro_idle;
869	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
870	static int coro_nready;
871
872	static void	973	static void
873	coro_enq (pTHX_ SV *sv)	974	coro_enq (SV *coro_sv)
874	{	975	{
875	int prio;
876
877	if (SvTYPE (sv) != SVt_PVHV)
878	croak ("Coro::ready tried to enqueue something that is not a coroutine");
879
880	prio = SvSTATE (sv)->prio;
881
882	av_push (coro_ready [prio - PRIO_MIN], sv);	976	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
883	coro_nready++;
884	}	977	}
885		978
886	static SV *	979	static SV *
887	coro_deq (pTHX_ int min_prio)	980	coro_deq (int min_prio)
888	{	981	{
889	int prio = PRIO_MAX - PRIO_MIN;	982	int prio = PRIO_MAX - PRIO_MIN;
890		983
891	min_prio -= PRIO_MIN;	984	min_prio -= PRIO_MIN;
892	if (min_prio < 0)	985	if (min_prio < 0)
893	min_prio = 0;	986	min_prio = 0;
894		987
895	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	988	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
896	if (AvFILLp (coro_ready [prio]) >= 0)	989	if (AvFILLp (coro_ready [prio]) >= 0)
897	{
898	coro_nready--;
899	return av_shift (coro_ready [prio]);	990	return av_shift (coro_ready [prio]);
900	}
901		991
902	return 0;	992	return 0;
903	}	993	}
904		994
905	static void	995	static int
906	api_ready (SV *coro)	996	api_ready (SV *coro_sv)
907	{	997	{
908	dTHX;	998	struct coro *coro;
909		999
910	if (SvROK (coro))	1000	if (SvROK (coro_sv))
911	coro = SvRV (coro);	1001	coro_sv = SvRV (coro_sv);
		1002
		1003	coro = SvSTATE (coro_sv);
		1004
		1005	if (coro->flags & CF_READY)
		1006	return 0;
		1007
		1008	coro->flags |= CF_READY;
912		1009
913	LOCK;	1010	LOCK;
914	coro_enq (aTHX_ SvREFCNT_inc (coro));	1011	coro_enq (SvREFCNT_inc (coro_sv));
		1012	++coro_nready;
915	UNLOCK;	1013	UNLOCK;
		1014
		1015	return 1;
		1016	}
		1017
		1018	static int
		1019	api_is_ready (SV *coro_sv)
		1020	{
		1021	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1022	}
		1023
		1024	static void
		1025	prepare_schedule (struct transfer_args *ta)
		1026	{
		1027	SV *prev_sv, *next_sv;
		1028
		1029	for (;;)
		1030	{
		1031	LOCK;
		1032	next_sv = coro_deq (PRIO_MIN);
		1033
		1034	/* nothing to schedule: call the idle handler */
		1035	if (!next_sv)
		1036	{
		1037	dSP;
		1038	UNLOCK;
		1039
		1040	ENTER;
		1041	SAVETMPS;
		1042
		1043	PUSHMARK (SP);
		1044	PUTBACK;
		1045	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1046
		1047	FREETMPS;
		1048	LEAVE;
		1049	continue;
		1050	}
		1051
		1052	ta->next = SvSTATE (next_sv);
		1053
		1054	/* cannot transfer to destroyed coros, skip and look for next */
		1055	if (ta->next->flags & CF_DESTROYED)
		1056	{
		1057	UNLOCK;
		1058	SvREFCNT_dec (next_sv);
		1059	/* coro_nready is already taken care of by destroy */
		1060	continue;
		1061	}
		1062
		1063	--coro_nready;
		1064	UNLOCK;
		1065	break;
		1066	}
		1067
		1068	/* free this only after the transfer */
		1069	prev_sv = SvRV (coro_current);
		1070	SvRV_set (coro_current, next_sv);
		1071	ta->prev = SvSTATE (prev_sv);
		1072
		1073	assert (ta->next->flags & CF_READY);
		1074	ta->next->flags &= ~CF_READY;
		1075
		1076	LOCK;
		1077	free_coro_mortal ();
		1078	coro_mortal = prev_sv;
		1079	UNLOCK;
		1080	}
		1081
		1082	static void
		1083	prepare_cede (struct transfer_args *ta)
		1084	{
		1085	api_ready (coro_current);
		1086	prepare_schedule (ta);
		1087	}
		1088
		1089	static int
		1090	prepare_cede_notself (struct transfer_args *ta)
		1091	{
		1092	if (coro_nready)
		1093	{
		1094	SV *prev = SvRV (coro_current);
		1095	prepare_schedule (ta);
		1096	api_ready (prev);
		1097	return 1;
		1098	}
		1099	else
		1100	return 0;
916	}	1101	}
917		1102
918	static void	1103	static void
919	api_schedule (void)	1104	api_schedule (void)
920	{	1105	{
921	dTHX;	1106	struct transfer_args ta;
922		1107
923	SV *prev, *next;	1108	prepare_schedule (&ta);
924	SV *current = GvSV (coro_current);	1109	TRANSFER (ta);
925
926	for (;;)
927	{
928	LOCK;
929
930	next = coro_deq (aTHX_ PRIO_MIN);
931
932	if (next)
933	break;
934
935	UNLOCK;
936
937	{
938	dSP;
939
940	ENTER;
941	SAVETMPS;
942
943	PUSHMARK (SP);
944	PUTBACK;
945	call_sv (GvSV (coro_idle), G_DISCARD);
946
947	FREETMPS;
948	LEAVE;
949	}
950	}
951
952	prev = SvRV (current);
953	SvRV (current) = next;
954
955	/* free this only after the transfer */
956	coro_mortal = prev;
957
958	UNLOCK;
959
960	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
961	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
962	}	1110	}
963		1111
964	static void	1112	static int
965	api_cede (void)	1113	api_cede (void)
966	{	1114	{
967	dTHX;	1115	struct transfer_args ta;
968		1116
969	LOCK;	1117	prepare_cede (&ta);
970	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
971	UNLOCK;
972		1118
973	api_schedule ();	1119	if (ta.prev != ta.next)
		1120	{
		1121	TRANSFER (ta);
		1122	return 1;
		1123	}
		1124	else
		1125	return 0;
		1126	}
		1127
		1128	static int
		1129	api_cede_notself (void)
		1130	{
		1131	struct transfer_args ta;
		1132
		1133	if (prepare_cede_notself (&ta))
		1134	{
		1135	TRANSFER (ta);
		1136	return 1;
		1137	}
		1138	else
		1139	return 0;
974	}	1140	}
975		1141
976	MODULE = Coro::State PACKAGE = Coro::State	1142	MODULE = Coro::State PACKAGE = Coro::State
977		1143
978	PROTOTYPES: DISABLE	1144	PROTOTYPES: DISABLE
…		…
984	#endif	1150	#endif
985	BOOT_PAGESIZE;	1151	BOOT_PAGESIZE;
986		1152
987	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1153	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
988		1154
989	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1155	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
990	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1156	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
991	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1157	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1158	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
992	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1159	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
993		1160
994	main_mainstack = PL_mainstack;	1161	main_mainstack = PL_mainstack;
995		1162
996	coroapi.ver = CORO_API_VERSION;	1163	coroapi.ver = CORO_API_VERSION;
997	coroapi.transfer = api_transfer;	1164	coroapi.transfer = api_transfer;
…		…
1007	HV *hv;	1174	HV *hv;
1008	int i;	1175	int i;
1009		1176
1010	Newz (0, coro, 1, struct coro);	1177	Newz (0, coro, 1, struct coro);
1011	coro->args = newAV ();	1178	coro->args = newAV ();
1012		1179	coro->save = CORO_SAVE_ALL;
1013	for (i = 1; i < items; i++)	1180	coro->flags = CF_NEW;
1014	av_push (coro->args, newSVsv (ST (i)));
1015
1016	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1017	/*coro->stack = 0;*/
1018		1181
1019	hv = newHV ();	1182	hv = newHV ();
1020	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1183	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1021	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1184	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1185
		1186	for (i = 1; i < items; i++)
		1187	av_push (coro->args, newSVsv (ST (i)));
1022	}	1188	}
1023	OUTPUT:	1189	OUTPUT:
1024	RETVAL	1190	RETVAL
1025		1191
		1192	int
		1193	save (SV *coro, int new_save = -1)
		1194	CODE:
		1195	RETVAL = api_save (coro, new_save);
		1196	OUTPUT:
		1197	RETVAL
		1198
1026	void	1199	void
1027	transfer(prev, next, flags)	1200	_set_stacklevel (...)
1028	SV *prev	1201	ALIAS:
1029	SV *next	1202	Coro::State::transfer = 1
1030	int flags	1203	Coro::schedule = 2
		1204	Coro::cede = 3
		1205	Coro::cede_notself = 4
1031	CODE:	1206	CODE:
1032	PUTBACK;
1033	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
1034	SPAGAIN;
1035
1036	int
1037	prio (Coro::State coro, int newprio = 0)
1038	ALIAS:
1039	nice = 1
1040	CODE:
1041	{	1207	{
1042	RETVAL = coro->prio;	1208	struct transfer_args ta;
1043		1209
1044	if (items > 1)	1210	switch (ix)
1045	{	1211	{
		1212	case 0:
		1213	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1214	ta.next = 0;
		1215	break;
		1216
		1217	case 1:
1046	if (ix)	1218	if (items != 2)
1047	newprio += coro->prio;	1219	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1048		1220
1049	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1221	prepare_transfer (&ta, ST (0), ST (1));
1050	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1222	break;
1051		1223
1052	coro->prio = newprio;	1224	case 2:
		1225	prepare_schedule (&ta);
		1226	break;
		1227
		1228	case 3:
		1229	prepare_cede (&ta);
		1230	break;
		1231
		1232	case 4:
		1233	if (!prepare_cede_notself (&ta))
		1234	XSRETURN_EMPTY;
		1235
		1236	break;
1053	}	1237	}
1054	}
1055		1238
1056	void	1239	BARRIER;
1057	_clone_state_from (SV *dst, SV *src)	1240	TRANSFER (ta);
		1241
		1242	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1243	XSRETURN_YES;
		1244	}
		1245
		1246	bool
		1247	_destroy (SV *coro_sv)
1058	CODE:	1248	CODE:
1059	{	1249	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1060	struct coro *coro_src = SvSTATE (src);	1250	OUTPUT:
1061		1251	RETVAL
1062	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1063
1064	++coro_src->refcnt;
1065	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1066	}
1067		1252
1068	void	1253	void
1069	_exit (code)	1254	_exit (code)
1070	int code	1255	int code
1071	PROTOTYPE: $	1256	PROTOTYPE: $
1072	CODE:	1257	CODE:
1073	_exit (code);	1258	_exit (code);
1074		1259
1075	MODULE = Coro::State PACKAGE = Coro::Cont	1260	int
		1261	cctx_count ()
		1262	CODE:
		1263	RETVAL = cctx_count;
		1264	OUTPUT:
		1265	RETVAL
1076		1266
1077	void	1267	int
1078	yield (...)	1268	cctx_idle ()
1079	PROTOTYPE: @	1269	CODE:
1080	CODE:	1270	RETVAL = cctx_idle;
1081	{	1271	OUTPUT:
1082	SV *yieldstack;	1272	RETVAL
1083	SV *sv;
1084	AV *defav = GvAV (PL_defgv);
1085	struct coro *prev, *next;
1086
1087	yieldstack = *hv_fetch (
1088	(HV *)SvRV (GvSV (coro_current)),
1089	"yieldstack", sizeof ("yieldstack") - 1,
1090	0
1091	);
1092
1093	/* set up @_ -- ugly */
1094	av_clear (defav);
1095	av_fill (defav, items - 1);
1096	while (items--)
1097	av_store (defav, items, SvREFCNT_inc (ST(items)));
1098
1099	sv = av_pop ((AV *)SvRV (yieldstack));
1100	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1101	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1102	SvREFCNT_dec (sv);
1103
1104	coro_state_transfer (aTHX_ prev, next, 0);
1105	}
1106		1273
1107	MODULE = Coro::State PACKAGE = Coro	1274	MODULE = Coro::State PACKAGE = Coro
1108		1275
1109	BOOT:	1276	BOOT:
1110	{	1277	{
…		…
1117	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1284	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1118	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1285	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1119	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1286	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1120	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1287	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1121		1288
1122	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1289	coro_current = get_sv ("Coro::current", FALSE);
1123	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1290	SvREADONLY_on (coro_current);
1124		1291
1125	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1292	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1126	coro_ready[i] = newAV ();	1293	coro_ready[i] = newAV ();
1127		1294
1128	{	1295	{
1129	SV *sv = perl_get_sv("Coro::API", 1);	1296	SV *sv = perl_get_sv("Coro::API", 1);
1130		1297
1131	coroapi.schedule = api_schedule;	1298	coroapi.schedule = api_schedule;
		1299	coroapi.save = api_save;
1132	coroapi.cede = api_cede;	1300	coroapi.cede = api_cede;
		1301	coroapi.cede_notself = api_cede_notself;
1133	coroapi.ready = api_ready;	1302	coroapi.ready = api_ready;
		1303	coroapi.is_ready = api_is_ready;
1134	coroapi.nready = &coro_nready;	1304	coroapi.nready = &coro_nready;
1135	coroapi.current = coro_current;	1305	coroapi.current = coro_current;
1136		1306
1137	GCoroAPI = &coroapi;	1307	GCoroAPI = &coroapi;
1138	sv_setiv (sv, (IV)&coroapi);	1308	sv_setiv (sv, (IV)&coroapi);
1139	SvREADONLY_on (sv);	1309	SvREADONLY_on (sv);
1140	}	1310	}
1141	}	1311	}
1142		1312
1143	#if !PERL_MICRO
1144
1145	void	1313	void
1146	ready (self)	1314	_set_current (SV *current)
1147	SV * self
1148	PROTOTYPE: $	1315	PROTOTYPE: $
1149	CODE:	1316	CODE:
1150	api_ready (self);	1317	SvREFCNT_dec (SvRV (coro_current));
		1318	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1151		1319
1152	#endif	1320	int
		1321	prio (Coro::State coro, int newprio = 0)
		1322	ALIAS:
		1323	nice = 1
		1324	CODE:
		1325	{
		1326	RETVAL = coro->prio;
		1327
		1328	if (items > 1)
		1329	{
		1330	if (ix)
		1331	newprio = coro->prio - newprio;
		1332
		1333	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1334	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1335
		1336	coro->prio = newprio;
		1337	}
		1338	}
		1339	OUTPUT:
		1340	RETVAL
		1341
		1342	SV *
		1343	ready (SV *self)
		1344	PROTOTYPE: $
		1345	CODE:
		1346	RETVAL = boolSV (api_ready (self));
		1347	OUTPUT:
		1348	RETVAL
		1349
		1350	SV *
		1351	is_ready (SV *self)
		1352	PROTOTYPE: $
		1353	CODE:
		1354	RETVAL = boolSV (api_is_ready (self));
		1355	OUTPUT:
		1356	RETVAL
1153		1357
1154	int	1358	int
1155	nready (...)	1359	nready (...)
1156	PROTOTYPE:	1360	PROTOTYPE:
1157	CODE:	1361	CODE:
1158	RETVAL = coro_nready;	1362	RETVAL = coro_nready;
1159	OUTPUT:	1363	OUTPUT:
1160	RETVAL	1364	RETVAL
1161		1365
1162	void	1366	MODULE = Coro::State PACKAGE = Coro::AIO
1163	schedule (...)	1367
1164	PROTOTYPE:	1368	SV *
		1369	_get_state ()
1165	CODE:	1370	CODE:
1166	api_schedule ();
1167
1168	void
1169	cede (...)
1170	PROTOTYPE:
1171	CODE:
1172	api_cede ();
1173
1174	# and these are hacks
1175	SV *
1176	_aio_get_state ()
1177	CODE:
1178	{	1371	{
1179	struct {	1372	struct io_state *data;
1180	int errorno;
1181	int laststype;
1182	int laststatval;
1183	Stat_t statcache;
1184	} data;
1185		1373
		1374	RETVAL = newSV (sizeof (struct io_state));
		1375	data = (struct io_state *)SvPVX (RETVAL);
		1376	SvCUR_set (RETVAL, sizeof (struct io_state));
		1377	SvPOK_only (RETVAL);
		1378
1186	data.errorno = errno;	1379	data->errorno = errno;
1187	data.laststype = PL_laststype;	1380	data->laststype = PL_laststype;
1188	data.laststatval = PL_laststatval;	1381	data->laststatval = PL_laststatval;
1189	data.statcache = PL_statcache;	1382	data->statcache = PL_statcache;
1190
1191	RETVAL = newSVpvn ((char *)&data, sizeof data);
1192	}	1383	}
1193	OUTPUT:	1384	OUTPUT:
1194	RETVAL	1385	RETVAL
1195		1386
1196	void	1387	void
1197	_aio_set_state (char *data_)	1388	_set_state (char *data_)
1198	PROTOTYPE: $	1389	PROTOTYPE: $
1199	CODE:	1390	CODE:
1200	{	1391	{
1201	struct {	1392	struct io_state *data = (void *)data_;
1202	int errorno;
1203	int laststype;
1204	int laststatval;
1205	Stat_t statcache;
1206	} *data = (void *)data_;
1207		1393
1208	errno = data->errorno;	1394	errno = data->errorno;
1209	PL_laststype = data->laststype;	1395	PL_laststype = data->laststype;
1210	PL_laststatval = data->laststatval;	1396	PL_laststatval = data->laststatval;
1211	PL_statcache = data->statcache;	1397	PL_statcache = data->statcache;
1212	}	1398	}
		1399

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