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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.97 by root, Sun Nov 26 21:21:14 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 <stdio.h>	70	/* 5.8.7 */
33	#include <errno.h>	71	#ifndef SvRV_set
		72	# define SvRV_set(s,v) SvRV(s) = (v)
		73	#endif
34		74
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	76	# undef STACKGUARD
37	#endif	77	#endif
38		78
39	#ifndef STACKGUARD	79	#ifndef STACKGUARD
40	# define STACKGUARD 0	80	# define STACKGUARD 0
41	#endif	81	#endif
42		82
43	#ifdef HAVE_MMAP	83	/* prefer perl internal functions over our own? */
44	# include <unistd.h>	84	#ifndef PREFER_PERL_FUNCTIONS
45	# include <sys/mman.h>	85	# define PREFER_PERL_FUNCTIONS 0
46	# ifndef MAP_ANONYMOUS
47	# ifdef MAP_ANON
48	# define MAP_ANONYMOUS MAP_ANON
49	# else
50	# undef HAVE_MMAP
51	# endif
52	# endif
53	# include <limits.h>
54	# ifndef PAGESIZE
55	# define PAGESIZE pagesize
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif
61	#endif	86	#endif
62		87
63	/* 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
64	* 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
65	* and should be unique. */	90	* and should be unique. */
66	#define dSTACKLEVEL int stacklevel	91	#define dSTACKLEVEL int stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	92	#define STACKLEVEL ((void *)&stacklevel)
68		93
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		95
		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))
		105
71	#include "CoroAPI.h"	106	#include "CoroAPI.h"
72
73	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74		107
75	#ifdef USE_ITHREADS	108	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	109	static perl_mutex coro_mutex;
77	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	110	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	111	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79	#else	112	#else
80	# define LOCK (void)0	113	# define LOCK (void)0
81	# define UNLOCK (void)0	114	# define UNLOCK (void)0
82	#endif	115	#endif
83		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
84	static struct CoroAPI coroapi;	126	static struct CoroAPI coroapi;
85	static AV *main_mainstack; /* used to differentiate between $main and others */	127	static AV *main_mainstack; /* used to differentiate between $main and others */
86	static HV *coro_state_stash, *coro_stash;	128	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	129	static SV *coro_mortal; /* will be freed after next transfer */
88		130
		131	static struct coro_cctx *cctx_first;
		132	static int cctx_count, cctx_idle;
		133
89	/* this is a structure representing a c-level coroutine */	134	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	135	typedef struct coro_cctx {
91	struct coro_stack *next;	136	struct coro_cctx *next;
92		137
93	/* the stack */	138	/* the stack */
94	void *sptr;	139	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	140	long ssize; /* positive == mmap, otherwise malloc */
96		141
97	/* cpu state */	142	/* cpu state */
98	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	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 */
99	JMPENV *top_env;	145	JMPENV *top_env;
100	coro_context cctx;	146	coro_context cctx;
101	} coro_stack;	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	};
102		161
103	/* this is a structure representing a perl-level coroutine */	162	/* this is a structure representing a perl-level coroutine */
104	struct coro {	163	struct coro {
105	/* the c coroutine allocated to this perl coroutine, if any */	164	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	165	coro_cctx *cctx;
107		166
108	/* data associated with this coroutine (initial args) */	167	/* data associated with this coroutine (initial args) */
109	AV *args;	168	AV *args;
110	int refcnt;	169	int refcnt;
		170	int save; /* CORO_SAVE flags */
		171	int flags; /* CF_ flags */
111		172
112	/* optionally saved, might be zero */	173	/* optionally saved, might be zero */
113	AV *defav;	174	AV *defav; /* @_ */
114	SV *defsv;	175	SV *defsv; /* $_ */
115	SV *errsv;	176	SV *errsv; /* $@ */
		177	SV *irssv; /* $/ */
		178	SV *irssv_sv; /* real $/ cache */
116		179
117	/* saved global state not related to stacks */	180	#define VAR(name,type) type name;
118	U8 dowarn;	181	# include "state.h"
119	I32 in_eval;	182	#undef VAR
120
121	/* the stacks and related info (callchain etc..) */
122	PERL_SI *curstackinfo;
123	AV *curstack;
124	AV *mainstack;
125	SV **stack_sp;
126	OP *op;
127	SV **curpad;
128	AV *comppad;
129	CV *compcv;
130	SV **stack_base;
131	SV **stack_max;
132	SV **tmps_stack;
133	I32 tmps_floor;
134	I32 tmps_ix;
135	I32 tmps_max;
136	I32 *markstack;
137	I32 *markstack_ptr;
138	I32 *markstack_max;
139	I32 *scopestack;
140	I32 scopestack_ix;
141	I32 scopestack_max;
142	ANY *savestack;
143	I32 savestack_ix;
144	I32 savestack_max;
145	OP **retstack;
146	I32 retstack_ix;
147	I32 retstack_max;
148	PMOP *curpm;
149	COP *curcop;
150		183
151	/* coro process data */	184	/* coro process data */
152	int prio;	185	int prio;
153	};	186	};
154		187
155	typedef struct coro *Coro__State;	188	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	189	typedef struct coro *Coro__State_or_hashref;
157		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
158	static AV *	207	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	208	coro_clone_padlist (CV *cv)
160	{	209	{
161	AV *padlist = CvPADLIST (cv);	210	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	211	AV *newpadlist, *newpad;
163		212
164	newpadlist = newAV ();	213	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	214	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	215	#if PERL_VERSION_ATLEAST (5,9,0)
		216	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		217	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	218	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	219	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	220	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	221	--AvFILLp (padlist);
173		222
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	223	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
176		225
177	return newpadlist;	226	return newpadlist;
178	}	227	}
179		228
180	static void	229	static void
181	free_padlist (pTHX_ AV *padlist)	230	free_padlist (AV *padlist)
182	{	231	{
183	/* may be during global destruction */	232	/* may be during global destruction */
184	if (SvREFCNT (padlist))	233	if (SvREFCNT (padlist))
185	{	234	{
186	I32 i = AvFILLp (padlist);	235	I32 i = AvFILLp (padlist);
…		…
207	AV *padlist;	256	AV *padlist;
208	AV *av = (AV *)mg->mg_obj;	257	AV *av = (AV *)mg->mg_obj;
209		258
210	/* casting is fun. */	259	/* casting is fun. */
211	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	260	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212	free_padlist (aTHX_ padlist);	261	free_padlist (padlist);
213		262
214	SvREFCNT_dec (av);	263	SvREFCNT_dec (av);
215		264
216	return 0;	265	return 0;
217	}	266	}
218		267
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	268	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		269
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	270	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		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
223	/* the next two functions merely cache the padlists */	279	/* the next two functions merely cache the padlists */
224	static void	280	static void
225	get_padlist (pTHX_ CV *cv)	281	get_padlist (CV *cv)
226	{	282	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	283	MAGIC *mg = CORO_MAGIC (cv);
		284	AV *av;
228		285
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	286	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	287	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	288	else
232	{	289	{
233	#if 0	290	#if PREFER_PERL_FUNCTIONS
234	/* this is probably cleaner, but also slower? */	291	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	292	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	293	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	294	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	295	SvREFCNT_dec (cp);
239	#else	296	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	297	CvPADLIST (cv) = coro_clone_padlist (cv);
241	#endif	298	#endif
242	}	299	}
243	}	300	}
244		301
245	static void	302	static void
246	put_padlist (pTHX_ CV *cv)	303	put_padlist (CV *cv)
247	{	304	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	305	MAGIC *mg = CORO_MAGIC (cv);
		306	AV *av;
249		307
250	if (!mg)	308	if (!mg)
251	{	309	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	310	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	311	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	312	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	313	mg->mg_obj = (SV *)newAV ();
256	}	314	}
257		315
258	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);
259	}	322	}
		323
		324	/** load & save, init *******************************************************/
260		325
261	#define SB do {	326	#define SB do {
262	#define SE } while (0)	327	#define SE } while (0)
263		328
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	329	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
268		330
269	static void	331	static void
270	load_state(pTHX_ Coro__State c)	332	load_perl (Coro__State c)
271	{	333	{
272	PL_dowarn = c->dowarn;	334	#define VAR(name,type) PL_ ## name = c->name;
273	PL_in_eval = c->in_eval;	335	# include "state.h"
274		336	#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		337
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	338	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	339	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	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	}
309		352
310	{	353	{
311	dSP;	354	dSP;
312	CV *cv;	355	CV *cv;
313		356
314	/* now do the ugly restore mess */	357	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	358	while ((cv = (CV *)POPs))
316	{	359	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	360	put_padlist (cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	361	CvDEPTH (cv) = PTR2IV (POPs);
323	}	362	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	363	}
327		364
328	PUTBACK;	365	PUTBACK;
329	}	366	}
330	}	367	}
331		368
332	static void	369	static void
333	save_state(pTHX_ Coro__State c, int flags)	370	save_perl (Coro__State c)
334	{	371	{
335	{	372	{
336	dSP;	373	dSP;
337	I32 cxix = cxstack_ix;	374	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	375	PERL_CONTEXT *ccstk = cxstack;
…		…
341	/*	378	/*
342	* 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
343	* (and reinitialize) all cv's in the whole callchain :(	380	* (and reinitialize) all cv's in the whole callchain :(
344	*/	381	*/
345		382
		383	EXTEND (SP, 3 + 1);
346	PUSHs (Nullsv);	384	PUSHs (Nullsv);
347	/* this loop was inspired by pp_caller */	385	/* this loop was inspired by pp_caller */
348	for (;;)	386	for (;;)
349	{	387	{
350	while (cxix >= 0)	388	while (cxix >= 0)
351	{	389	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	390	PERL_CONTEXT *cx = &ccstk[cxix--];
353		391
354	if (CxTYPE(cx) == CXt_SUB)	392	if (CxTYPE (cx) == CXt_SUB)
355	{	393	{
356	CV *cv = cx->blk_sub.cv;	394	CV *cv = cx->blk_sub.cv;
		395
357	if (CvDEPTH(cv))	396	if (CvDEPTH (cv))
358	{	397	{
359	EXTEND (SP, CvDEPTH(cv)*2);	398	EXTEND (SP, 3);
360
361	while (--CvDEPTH(cv))
362	{
363	/* this tells the restore code to increment CvDEPTH */
364	PUSHs (Nullsv);
365	PUSHs ((SV *)cv);
366	}
367
368	PUSHs ((SV *)CvPADLIST(cv));	399	PUSHs ((SV *)CvPADLIST (cv));
		400	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	401	PUSHs ((SV *)cv);
370		402
		403	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	404	get_padlist (cv);
372	}	405	}
373	}	406	}
374	#ifdef CXt_FORMAT
375	else if (CxTYPE(cx) == CXt_FORMAT)
376	{
377	/* I never used formats, so how should I know how these are implemented? */
378	/* my bold guess is as a simple, plain sub... */
379	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380	}
381	#endif
382	}	407	}
383		408
384	if (top_si->si_type == PERLSI_MAIN)	409	if (top_si->si_type == PERLSI_MAIN)
385	break;	410	break;
386		411
…		…
390	}	415	}
391		416
392	PUTBACK;	417	PUTBACK;
393	}	418	}
394		419
395	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;
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	421	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
397	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;
398		424
399	c->dowarn = PL_dowarn;	425	#define VAR(name,type)c->name = PL_ ## name;
400	c->in_eval = PL_in_eval;	426	# include "state.h"
401		427	#undef VAR
402	c->curstackinfo = PL_curstackinfo;
403	c->curstack = PL_curstack;
404	c->mainstack = PL_mainstack;
405	c->stack_sp = PL_stack_sp;
406	c->op = PL_op;
407	c->curpad = PL_curpad;
408	c->comppad = PL_comppad;
409	c->compcv = PL_compcv;
410	c->stack_base = PL_stack_base;
411	c->stack_max = PL_stack_max;
412	c->tmps_stack = PL_tmps_stack;
413	c->tmps_floor = PL_tmps_floor;
414	c->tmps_ix = PL_tmps_ix;
415	c->tmps_max = PL_tmps_max;
416	c->markstack = PL_markstack;
417	c->markstack_ptr = PL_markstack_ptr;
418	c->markstack_max = PL_markstack_max;
419	c->scopestack = PL_scopestack;
420	c->scopestack_ix = PL_scopestack_ix;
421	c->scopestack_max = PL_scopestack_max;
422	c->savestack = PL_savestack;
423	c->savestack_ix = PL_savestack_ix;
424	c->savestack_max = PL_savestack_max;
425	#if PERL_VERSION < 9
426	c->retstack = PL_retstack;
427	c->retstack_ix = PL_retstack_ix;
428	c->retstack_max = PL_retstack_max;
429	#endif
430	c->curpm = PL_curpm;
431	c->curcop = PL_curcop;
432	}	428	}
433		429
434	/*	430	/*
435	* allocate various perl stacks. This is an exact copy	431	* allocate various perl stacks. This is an exact copy
436	* of perl.c:init_stacks, except that it uses less memory	432	* of perl.c:init_stacks, except that it uses less memory
437	* on the (sometimes correct) assumption that coroutines do	433	* on the (sometimes correct) assumption that coroutines do
438	* not usually need a lot of stackspace.	434	* not usually need a lot of stackspace.
439	*/	435	*/
		436	#if PREFER_PERL_FUNCTIONS
		437	# define coro_init_stacks init_stacks
		438	#else
440	static void	439	static void
441	coro_init_stacks (pTHX)	440	coro_init_stacks ()
442	{	441	{
443	LOCK;
444
445	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	442	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
446	PL_curstackinfo->si_type = PERLSI_MAIN;	443	PL_curstackinfo->si_type = PERLSI_MAIN;
447	PL_curstack = PL_curstackinfo->si_stack;	444	PL_curstack = PL_curstackinfo->si_stack;
448	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	445	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449		446
450	PL_stack_base = AvARRAY(PL_curstack);	447	PL_stack_base = AvARRAY(PL_curstack);
451	PL_stack_sp = PL_stack_base;	448	PL_stack_sp = PL_stack_base;
452	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	449	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453		450
454	New(50,PL_tmps_stack,96,SV*);	451	New(50,PL_tmps_stack,128,SV*);
455	PL_tmps_floor = -1;	452	PL_tmps_floor = -1;
456	PL_tmps_ix = -1;	453	PL_tmps_ix = -1;
457	PL_tmps_max = 96;	454	PL_tmps_max = 128;
458		455
459	New(54,PL_markstack,16,I32);	456	New(54,PL_markstack,32,I32);
460	PL_markstack_ptr = PL_markstack;	457	PL_markstack_ptr = PL_markstack;
461	PL_markstack_max = PL_markstack + 16;	458	PL_markstack_max = PL_markstack + 32;
462		459
463	#ifdef SET_MARK_OFFSET	460	#ifdef SET_MARK_OFFSET
464	SET_MARK_OFFSET;	461	SET_MARK_OFFSET;
465	#endif	462	#endif
466		463
467	New(54,PL_scopestack,16,I32);	464	New(54,PL_scopestack,32,I32);
468	PL_scopestack_ix = 0;	465	PL_scopestack_ix = 0;
469	PL_scopestack_max = 16;	466	PL_scopestack_max = 32;
470		467
471	New(54,PL_savestack,96,ANY);	468	New(54,PL_savestack,64,ANY);
472	PL_savestack_ix = 0;	469	PL_savestack_ix = 0;
473	PL_savestack_max = 96;	470	PL_savestack_max = 64;
474		471
475	#if PERL_VERSION < 9	472	#if !PERL_VERSION_ATLEAST (5,9,0)
476	New(54,PL_retstack,8,OP*);	473	New(54,PL_retstack,16,OP*);
477	PL_retstack_ix = 0;	474	PL_retstack_ix = 0;
478	PL_retstack_max = 8;	475	PL_retstack_max = 16;
479	#endif	476	#endif
480
481	UNLOCK;
482	}	477	}
		478	#endif
483		479
484	/*	480	/*
485	* destroy the stacks, the callchain etc...	481	* destroy the stacks, the callchain etc...
486	*/	482	*/
487	static void	483	static void
488	destroy_stacks(pTHX)	484	coro_destroy_stacks ()
489	{	485	{
490	if (!IN_DESTRUCT)	486	if (!IN_DESTRUCT)
491	{	487	{
492	/* is this ugly, I ask? */	488	/* restore all saved variables and stuff */
493	LEAVE_SCOPE (0);	489	LEAVE_SCOPE (0);
		490	assert (PL_tmps_floor == -1);
494		491
495	/* sure it is, but more important: is it correct?? :/ */	492	/* free all temporaries */
496	FREETMPS;	493	FREETMPS;
		494	assert (PL_tmps_ix == -1);
497		495
		496	/* unwind all extra stacks */
498	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	497	POPSTACK_TO (PL_mainstack);
		498
		499	/* unwind main stack */
		500	dounwind (-1);
499	}	501	}
500		502
501	while (PL_curstackinfo->si_next)	503	while (PL_curstackinfo->si_next)
502	PL_curstackinfo = PL_curstackinfo->si_next;	504	PL_curstackinfo = PL_curstackinfo->si_next;
503		505
504	while (PL_curstackinfo)	506	while (PL_curstackinfo)
505	{	507	{
506	PERL_SI *p = PL_curstackinfo->si_prev;	508	PERL_SI *p = PL_curstackinfo->si_prev;
507		509
508	{ /*D*//*remove*/
509	dSP;
510	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511	PUTBACK; /* possibly superfluous */
512	}
513
514	if (!IN_DESTRUCT)	510	if (!IN_DESTRUCT)
515	{
516	dounwind (-1);/*D*//*remove*/
517	SvREFCNT_dec (PL_curstackinfo->si_stack);	511	SvREFCNT_dec (PL_curstackinfo->si_stack);
518	}
519		512
520	Safefree (PL_curstackinfo->si_cxstack);	513	Safefree (PL_curstackinfo->si_cxstack);
521	Safefree (PL_curstackinfo);	514	Safefree (PL_curstackinfo);
522	PL_curstackinfo = p;	515	PL_curstackinfo = p;
523	}	516	}
524		517
525	Safefree (PL_tmps_stack);	518	Safefree (PL_tmps_stack);
526	Safefree (PL_markstack);	519	Safefree (PL_markstack);
527	Safefree (PL_scopestack);	520	Safefree (PL_scopestack);
528	Safefree (PL_savestack);	521	Safefree (PL_savestack);
529	#if PERL_VERSION < 9	522	#if !PERL_VERSION_ATLEAST (5,9,0)
530	Safefree (PL_retstack);	523	Safefree (PL_retstack);
531	#endif	524	#endif
532	}	525	}
		526
		527	/** coroutine stack handling ************************************************/
533		528
534	static void	529	static void
535	setup_coro (struct coro *coro)	530	setup_coro (struct coro *coro)
536	{	531	{
537	/*	532	/*
538	* emulate part of the perl startup here.	533	* emulate part of the perl startup here.
539	*/	534	*/
540	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	{
541	dSP;	581	dSP;
542	UNOP myop;	582	LOGOP myop;
543	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
544		583
545	coro_init_stacks (aTHX);
546	/*PL_curcop = 0;*/
547	/*PL_in_eval = PL_in_eval;*/ /* inherit */
548	SvREFCNT_dec (GvAV (PL_defgv));
549	GvAV (PL_defgv) = coro->args; coro->args = 0;
550
551	SPAGAIN;
552
553	Zero (&myop, 1, UNOP);	584	Zero (&myop, 1, LOGOP);
554	myop.op_next = Nullop;	585	myop.op_next = PL_op;
555	myop.op_flags = OPf_WANT_VOID;	586	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
556		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;
557	PL_op = (OP *)&myop;	593	PL_op = (OP *)&myop;
558
559	PUSHMARK(SP);
560	XPUSHs (sub_init);
561	PUTBACK;
562	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	594	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
563	SPAGAIN;	595	SPAGAIN;
564
565	ENTER; /* necessary e.g. for dounwind */
566	}
567
568	static void
569	free_coro_mortal ()
570	{
571	if (coro_mortal)
572	{
573	dTHX;
574
575	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;
577	}
578	}	596	}
579		597
580	static void	598	static void
581	coro_run (void *arg)	599	coro_run (void *arg)
582	{	600	{
		601	/* coro_run is the alternative tail of transfer(), so unlock here. */
		602	UNLOCK;
		603
583	/*	604	/*
584	* this is a _very_ stripped down perl interpreter ;)	605	* this is a _very_ stripped down perl interpreter ;)
585	*/	606	*/
586	dTHX;
587	int ret;
588
589	UNLOCK;
590
591	PL_top_env = &PL_start_env;	607	PL_top_env = &PL_start_env;
592		608
593	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));	609	/* inject call to cctx_init */
594	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));	610	prepare_cctx ((coro_cctx *)arg);
595
596	/* continue at cctx_init, without entersub */
597	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
598		611
599	/* somebody will hit me for both perl_run and PL_restartop */	612	/* somebody will hit me for both perl_run and PL_restartop */
600	ret = perl_run (aTHX_ PERL_GET_CONTEXT);	613	PL_restartop = PL_op;
601	printf ("ret %d\n", ret);//D	614	perl_run (PL_curinterp);
602		615
603	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);	616	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
604	abort ();	617	abort ();
605	}	618	}
606		619
607	static coro_stack *	620	static coro_cctx *
608	stack_new ()	621	cctx_new ()
609	{	622	{
610	coro_stack *stack;	623	coro_cctx *cctx;
611		624
		625	++cctx_count;
		626
612	New (0, stack, 1, coro_stack);	627	Newz (0, cctx, 1, coro_cctx);
613		628
614	#if HAVE_MMAP	629	#if HAVE_MMAP
615		630
616	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	631	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
617	/* mmap suppsedly does allocate-on-write for us */	632	/* mmap supposedly does allocate-on-write for us */
618	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	633	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
619		634
620	if (stack->sptr == (void *)-1)	635	if (cctx->sptr == (void *)-1)
621	{	636	{
622	perror ("FATAL: unable to mmap stack for coroutine");	637	perror ("FATAL: unable to mmap stack for coroutine");
623	_exit (EXIT_FAILURE);	638	_exit (EXIT_FAILURE);
624	}	639	}
625		640
626	# if STACKGUARD	641	# if STACKGUARD
627	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	642	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
628	# endif	643	# endif
629		644
630	#else	645	#else
631		646
632	stack->ssize = STACKSIZE * (long)sizeof (long);	647	cctx->ssize = STACKSIZE * (long)sizeof (long);
633	New (0, stack->sptr, STACKSIZE, long);	648	New (0, cctx->sptr, STACKSIZE, long);
634		649
635	if (!stack->sptr)	650	if (!cctx->sptr)
636	{	651	{
637	perror (stderr, "FATAL: unable to malloc stack for coroutine");	652	perror ("FATAL: unable to malloc stack for coroutine");
638	_exit (EXIT_FAILURE);	653	_exit (EXIT_FAILURE);
639	}	654	}
640		655
641	#endif	656	#endif
642		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
643	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	665	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
644		666
645	return stack;	667	return cctx;
646	}	668	}
647		669
648	static void	670	static void
649	stack_free (coro_stack *stack)	671	cctx_destroy (coro_cctx *cctx)
650	{	672	{
651	if (!stack)	673	if (!cctx)
652	return;	674	return;
653		675
		676	--cctx_count;
		677
		678	#if USE_VALGRIND
		679	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		680	#endif
		681
654	#if HAVE_MMAP	682	#if HAVE_MMAP
655	munmap (stack->sptr, stack->ssize);	683	munmap (cctx->sptr, cctx->ssize);
656	#else	684	#else
657	Safefree (stack->sptr);	685	Safefree (cctx->sptr);
658	#endif	686	#endif
659		687
660	Safefree (stack);	688	Safefree (cctx);
661	}	689	}
662		690
663	static coro_stack *stack_first;
664
665	static coro_stack *	691	static coro_cctx *
666	stack_get ()	692	cctx_get ()
667	{	693	{
668	coro_stack *stack;	694	coro_cctx *cctx;
669		695
670	if (stack_first)	696	if (cctx_first)
671	{	697	{
672	stack = stack_first;	698	cctx = cctx_first;
673	stack_first = stack->next;	699	cctx_first = cctx->next;
		700	--cctx_idle;
674	}	701	}
675	else	702	else
676	{	703	{
677	stack = stack_new ();	704	cctx = cctx_new ();
678	PL_op = PL_op->op_next;	705	PL_op = PL_op->op_next;
679	}	706	}
680		707
681	return stack;	708	return cctx;
682	}	709	}
683		710
684	static void	711	static void
685	stack_put (coro_stack *stack)	712	cctx_put (coro_cctx *cctx)
686	{	713	{
687	stack->next = stack_first;	714	/* free another cctx if overlimit */
688	stack_first = stack;	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;
689	}	728	}
		729
		730	/** coroutine switching *****************************************************/
690		731
691	/* never call directly, always through the coro_state_transfer global variable */	732	/* never call directly, always through the coro_state_transfer global variable */
692	static void	733	static void NOINLINE
693	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	734	transfer (struct coro *prev, struct coro *next)
694	{	735	{
695	dSTACKLEVEL;	736	dSTACKLEVEL;
696		737
697	/* sometimes transfer is only called to set idle_sp */	738	/* sometimes transfer is only called to set idle_sp */
698	if (flags == TRANSFER_SET_STACKLEVEL)	739	if (!next)
		740	{
699	((coro_stack *)prev)->idle_sp = STACKLEVEL;	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	}
700	else if (prev != next)	744	else if (prev != next)
701	{	745	{
702	coro_stack *prev__stack;	746	coro_cctx *prev__cctx;
		747
		748	if (prev->flags & CF_NEW)
		749	{
		750	/* create a new empty context */
		751	Newz (0, prev->cctx, 1, coro_cctx);
		752	prev->cctx->inuse = 1;
		753	prev->flags &= ~CF_NEW;
		754	prev->flags |= CF_RUNNING;
		755	}
		756
		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;
703		769
704	LOCK;	770	LOCK;
705		771
706	if (next->mainstack)	772	if (next->flags & CF_NEW)
707	{	773	{
708	/* coroutine already started */	774	/* need to start coroutine */
709	SAVE (prev, flags);	775	next->flags &= ~CF_NEW;
710	LOAD (next);	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);
711	}	782	}
712	else	783	else
713	{	784	{
714	/* need to start coroutine */	785	/* coroutine already started */
715	/* first get rid of the old state */	786	save_perl (prev);
716	SAVE (prev, -1);	787	load_perl (next);
717	/* setup coroutine call */
718	setup_coro (next);
719	/* need a stack */
720	next->stack = 0;
721	}	788	}
722		789
723	if (!prev->stack)
724	/* create a new empty context */
725	Newz (0, prev->stack, 1, coro_stack);
726
727	prev__stack = prev->stack;	790	prev__cctx = prev->cctx;
728		791
729	/* possibly "free" the stack */	792	/* possibly "free" the cctx */
730	if (prev__stack->idle_sp == STACKLEVEL)	793	if (prev__cctx->idle_sp == STACKLEVEL)
731	{	794	{
732	stack_put (prev__stack);	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
733	prev->stack = 0;	798	prev->cctx = 0;
		799
		800	cctx_put (prev__cctx);
		801	prev__cctx->inuse = 0;
734	}	802	}
735		803
736	if (!next->stack)	804	if (!next->cctx)
737	next->stack = stack_get ();
738
739	if (prev__stack != next->stack)
740	{	805	{
741	prev__stack->top_env = PL_top_env;	806	next->cctx = cctx_get ();
742	PL_top_env = next->stack->top_env;	807	assert (!next->cctx->inuse);
743	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	808	next->cctx->inuse = 1;
744	}	809	}
745		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
746	free_coro_mortal ();	818	free_coro_mortal ();
747
748	UNLOCK;	819	UNLOCK;
749	}	820	}
750	}	821	}
751		822
752	/* use this function pointer to call the above function */
753	/* this is done to increase chances of the compiler not inlining the call */
754	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
755	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
756
757	struct transfer_args	823	struct transfer_args
758	{	824	{
759	struct coro *prev, *next;	825	struct coro *prev, *next;
760	int flags;
761	};	826	};
762		827
763	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	828	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
764		829
		830	/** high level stuff ********************************************************/
		831
765	static void	832	static int
766	coro_state_destroy (struct coro *coro)	833	coro_state_destroy (struct coro *coro)
767	{	834	{
768	if (coro->refcnt--)	835	if (coro->flags & CF_DESTROYED)
769	return;	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 */
770		850
771	if (coro->mainstack && coro->mainstack != main_mainstack)	851	if (coro->mainstack && coro->mainstack != main_mainstack)
772	{	852	{
		853	assert (!(coro->flags & CF_RUNNING));
		854
773	struct coro temp;	855	struct coro temp;
		856	Zero (&temp, 1, struct coro);
		857	temp.save = CORO_SAVE_ALL;
774		858
775	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	859	if (coro->flags & CF_RUNNING)
776	LOAD (aTHX_ coro);	860	croak ("FATAL: tried to destroy currently running coroutine");
777		861
		862	save_perl (&temp);
		863	load_perl (coro);
		864
778	destroy_stacks (aTHX);	865	coro_destroy_stacks ();
779		866
780	LOAD ((&temp)); /* this will get rid of defsv etc.. */	867	load_perl (&temp); /* this will get rid of defsv etc.. */
781		868
782	coro->mainstack = 0;	869	coro->mainstack = 0;
783	}	870	}
784		871
785	stack_free (coro->stack);	872	cctx_destroy (coro->cctx);
786	SvREFCNT_dec (coro->args);	873	SvREFCNT_dec (coro->args);
787	Safefree (coro);	874
		875	return 1;
788	}	876	}
789		877
790	static int	878	static int
791	coro_state_clear (SV *sv, MAGIC *mg)	879	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
792	{	880	{
793	struct coro *coro = (struct coro *)mg->mg_ptr;	881	struct coro *coro = (struct coro *)mg->mg_ptr;
794	mg->mg_ptr = 0;	882	mg->mg_ptr = 0;
795		883
		884	if (--coro->refcnt < 0)
		885	{
796	coro_state_destroy (coro);	886	coro_state_destroy (coro);
		887	Safefree (coro);
		888	}
797		889
798	return 0;	890	return 0;
799	}	891	}
800		892
801	static int	893	static int
802	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	894	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
803	{	895	{
804	struct coro *coro = (struct coro *)mg->mg_ptr;	896	struct coro *coro = (struct coro *)mg->mg_ptr;
805		897
806	++coro->refcnt;	898	++coro->refcnt;
807		899
808	return 0;	900	return 0;
809	}	901	}
810		902
811	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	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	};
812		913
813	static struct coro *	914	static struct coro *
814	SvSTATE (SV *coro)	915	SvSTATE (SV *coro)
815	{	916	{
816	HV *stash;	917	HV *stash;
…		…
831	assert (mg->mg_type == PERL_MAGIC_ext);	932	assert (mg->mg_type == PERL_MAGIC_ext);
832	return (struct coro *)mg->mg_ptr;	933	return (struct coro *)mg->mg_ptr;
833	}	934	}
834		935
835	static void	936	static void
836	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	937	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
837	{	938	{
838	ta->prev = SvSTATE (prev);	939	ta->prev = SvSTATE (prev_sv);
839	ta->next = SvSTATE (next);	940	ta->next = SvSTATE (next_sv);
840	ta->flags = flags;
841	}	941	}
842		942
843	static void	943	static void
844	api_transfer (SV *prev, SV *next, int flags)	944	api_transfer (SV *prev_sv, SV *next_sv)
845	{	945	{
846	dTHX;
847	struct transfer_args ta;	946	struct transfer_args ta;
848		947
849	prepare_transfer (aTHX_ &ta, prev, next, flags);	948	prepare_transfer (&ta, prev_sv, next_sv);
850	TRANSFER (ta);	949	TRANSFER (ta);
851	}	950	}
852		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;
		962	}
		963
853	/** Coro ********************************************************************/	964	/** Coro ********************************************************************/
854		965
855	#define PRIO_MAX 3
856	#define PRIO_HIGH 1
857	#define PRIO_NORMAL 0
858	#define PRIO_LOW -1
859	#define PRIO_IDLE -3
860	#define PRIO_MIN -4
861
862	/* for Coro.pm */
863	static GV *coro_current, *coro_idle;
864	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
865	static int coro_nready;
866
867	static void	966	static void
868	coro_enq (pTHX_ SV *sv)	967	coro_enq (SV *coro_sv)
869	{	968	{
870	int prio;
871
872	if (SvTYPE (sv) != SVt_PVHV)
873	croak ("Coro::ready tried to enqueue something that is not a coroutine");
874
875	prio = SvSTATE (sv)->prio;
876
877	av_push (coro_ready [prio - PRIO_MIN], sv);	969	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
878	coro_nready++;
879	}	970	}
880		971
881	static SV *	972	static SV *
882	coro_deq (pTHX_ int min_prio)	973	coro_deq (int min_prio)
883	{	974	{
884	int prio = PRIO_MAX - PRIO_MIN;	975	int prio = PRIO_MAX - PRIO_MIN;
885		976
886	min_prio -= PRIO_MIN;	977	min_prio -= PRIO_MIN;
887	if (min_prio < 0)	978	if (min_prio < 0)
888	min_prio = 0;	979	min_prio = 0;
889		980
890	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	981	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
891	if (AvFILLp (coro_ready [prio]) >= 0)	982	if (AvFILLp (coro_ready [prio]) >= 0)
892	{
893	coro_nready--;
894	return av_shift (coro_ready [prio]);	983	return av_shift (coro_ready [prio]);
895	}
896		984
897	return 0;	985	return 0;
898	}	986	}
899		987
900	static void	988	static int
901	api_ready (SV *coro)	989	api_ready (SV *coro_sv)
902	{	990	{
903	dTHX;	991	struct coro *coro;
904		992
905	if (SvROK (coro))	993	if (SvROK (coro_sv))
906	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;
907		1002
908	LOCK;	1003	LOCK;
909	coro_enq (aTHX_ SvREFCNT_inc (coro));	1004	coro_enq (SvREFCNT_inc (coro_sv));
		1005	++coro_nready;
910	UNLOCK;	1006	UNLOCK;
911	}
912		1007
		1008	return 1;
		1009	}
		1010
913	static void	1011	static int
		1012	api_is_ready (SV *coro_sv)
		1013	{
		1014	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1015	}
		1016
		1017	static void
914	prepare_schedule (aTHX_ struct transfer_args *ta)	1018	prepare_schedule (struct transfer_args *ta)
915	{	1019	{
916	SV *current, *prev, *next;	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;
917		1068
918	LOCK;	1069	LOCK;
919
920	current = GvSV (coro_current);
921
922	for (;;)
923	{
924	LOCK;
925
926	next = coro_deq (aTHX_ PRIO_MIN);
927
928	if (next)
929	break;
930
931	UNLOCK;
932
933	{
934	dSP;
935
936	ENTER;
937	SAVETMPS;
938
939	PUSHMARK (SP);
940	PUTBACK;
941	call_sv (GvSV (coro_idle), G_DISCARD);
942
943	FREETMPS;
944	LEAVE;
945	}
946	}
947
948	prev = SvRV (current);
949	SvRV (current) = next;
950
951	/* free this only after the transfer */
952	free_coro_mortal ();	1070	free_coro_mortal ();
953	coro_mortal = prev;	1071	coro_mortal = prev_sv;
954
955	ta->prev = SvSTATE (prev);
956	ta->next = SvSTATE (next);
957	ta->flags = TRANSFER_SAVE_ALL;
958
959	UNLOCK;	1072	UNLOCK;
960	}	1073	}
961		1074
962	static void	1075	static void
963	prepare_cede (aTHX_ struct transfer_args *ta)	1076	prepare_cede (struct transfer_args *ta)
964	{	1077	{
965	LOCK;	1078	api_ready (coro_current);
966	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
967	UNLOCK;
968
969	prepare_schedule (ta);	1079	prepare_schedule (ta);
970	}	1080	}
971		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;
		1094	}
		1095
972	static void	1096	static void
973	api_schedule (void)	1097	api_schedule (void)
974	{	1098	{
975	dTHX;
976	struct transfer_args ta;	1099	struct transfer_args ta;
977		1100
978	prepare_schedule (&ta);	1101	prepare_schedule (&ta);
979	TRANSFER (ta);	1102	TRANSFER (ta);
980	}	1103	}
981		1104
982	static void	1105	static int
983	api_cede (void)	1106	api_cede (void)
984	{	1107	{
985	dTHX;
986	struct transfer_args ta;	1108	struct transfer_args ta;
987		1109
988	prepare_cede (&ta);	1110	prepare_cede (&ta);
		1111
		1112	if (ta.prev != ta.next)
		1113	{
989	TRANSFER (ta);	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;
990	}	1133	}
991		1134
992	MODULE = Coro::State PACKAGE = Coro::State	1135	MODULE = Coro::State PACKAGE = Coro::State
993		1136
994	PROTOTYPES: DISABLE	1137	PROTOTYPES: DISABLE
…		…
1000	#endif	1143	#endif
1001	BOOT_PAGESIZE;	1144	BOOT_PAGESIZE;
1002		1145
1003	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1146	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1004		1147
1005	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1148	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1006	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1149	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1007	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));
		1152	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1008		1153
1009	main_mainstack = PL_mainstack;	1154	main_mainstack = PL_mainstack;
1010		1155
1011	coroapi.ver = CORO_API_VERSION;	1156	coroapi.ver = CORO_API_VERSION;
1012	coroapi.transfer = api_transfer;	1157	coroapi.transfer = api_transfer;
…		…
1022	HV *hv;	1167	HV *hv;
1023	int i;	1168	int i;
1024		1169
1025	Newz (0, coro, 1, struct coro);	1170	Newz (0, coro, 1, struct coro);
1026	coro->args = newAV ();	1171	coro->args = newAV ();
		1172	coro->save = CORO_SAVE_ALL;
		1173	coro->flags = CF_NEW;
1027		1174
1028	hv = newHV ();	1175	hv = newHV ();
1029	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1176	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1030	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1177	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1031		1178
1032	for (i = 1; i < items; i++)	1179	for (i = 1; i < items; i++)
1033	av_push (coro->args, newSVsv (ST (i)));	1180	av_push (coro->args, newSVsv (ST (i)));
1034
1035	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1036	/*coro->stack = 0;*/
1037	}	1181	}
1038	OUTPUT:	1182	OUTPUT:
		1183	RETVAL
		1184
		1185	int
		1186	save (SV *coro, int new_save = -1)
		1187	CODE:
		1188	RETVAL = api_save (coro, new_save);
		1189	OUTPUT:
1039	RETVAL	1190	RETVAL
1040		1191
1041	void	1192	void
1042	_set_stacklevel (...)	1193	_set_stacklevel (...)
1043	ALIAS:	1194	ALIAS:
1044	Coro::State::transfer = 1	1195	Coro::State::transfer = 1
1045	Coro::schedule = 2	1196	Coro::schedule = 2
1046	Coro::cede = 3	1197	Coro::cede = 3
1047	Coro::Cont::yield = 4	1198	Coro::cede_notself = 4
1048	CODE:	1199	CODE:
1049	{	1200	{
1050	struct transfer_args ta;	1201	struct transfer_args ta;
1051		1202
1052	switch (ix)	1203	switch (ix)
1053	{	1204	{
1054	case 0:	1205	case 0:
1055	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1206	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1056	ta.next = 0;	1207	ta.next = 0;
1057	ta.flags = TRANSFER_SET_STACKLEVEL;
1058	break;	1208	break;
1059		1209
1060	case 1:	1210	case 1:
1061	if (items != 3)	1211	if (items != 2)
1062	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1212	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1063		1213
1064	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1214	prepare_transfer (&ta, ST (0), ST (1));
1065	break;	1215	break;
1066		1216
1067	case 2:	1217	case 2:
1068	prepare_schedule (&ta);	1218	prepare_schedule (&ta);
1069	break;	1219	break;
…		…
1071	case 3:	1221	case 3:
1072	prepare_cede (&ta);	1222	prepare_cede (&ta);
1073	break;	1223	break;
1074		1224
1075	case 4:	1225	case 4:
1076	{	1226	if (!prepare_cede_notself (&ta))
1077	SV *yieldstack;	1227	XSRETURN_EMPTY;
1078	SV *sv;
1079	AV *defav = GvAV (PL_defgv);
1080		1228
1081	yieldstack = *hv_fetch (
1082	(HV *)SvRV (GvSV (coro_current)),
1083	"yieldstack", sizeof ("yieldstack") - 1,
1084	0
1085	);
1086
1087	/* set up @_ -- ugly */
1088	av_clear (defav);
1089	av_fill (defav, items - 1);
1090	while (items--)
1091	av_store (defav, items, SvREFCNT_inc (ST(items)));
1092
1093	sv = av_pop ((AV *)SvRV (yieldstack));
1094	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1095	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1096	ta.flags = 0;
1097	SvREFCNT_dec (sv);
1098	}
1099	break;	1229	break;
1100
1101	}	1230	}
1102		1231
		1232	BARRIER;
1103	TRANSFER (ta);	1233	TRANSFER (ta);
1104	}
1105		1234
1106	void	1235	if (GIMME_V != G_VOID && ta.next != ta.prev)
1107	_clone_state_from (SV *dst, SV *src)	1236	XSRETURN_YES;
		1237	}
		1238
		1239	bool
		1240	_destroy (SV *coro_sv)
1108	CODE:	1241	CODE:
1109	{	1242	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1110	struct coro *coro_src = SvSTATE (src);	1243	OUTPUT:
1111		1244	RETVAL
1112	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1113
1114	++coro_src->refcnt;
1115	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1116	}
1117
1118	void
1119	_nonlocal_goto (IV nextop)
1120	CODE:
1121	/* uuh, somebody will kill me again for this */
1122	PL_op->op_next = INT2PTR (OP *, nextop);
1123		1245
1124	void	1246	void
1125	_exit (code)	1247	_exit (code)
1126	int code	1248	int code
1127	PROTOTYPE: $	1249	PROTOTYPE: $
1128	CODE:	1250	CODE:
1129	_exit (code);	1251	_exit (code);
1130		1252
		1253	int
		1254	cctx_count ()
		1255	CODE:
		1256	RETVAL = cctx_count;
		1257	OUTPUT:
		1258	RETVAL
		1259
		1260	int
		1261	cctx_idle ()
		1262	CODE:
		1263	RETVAL = cctx_idle;
		1264	OUTPUT:
		1265	RETVAL
		1266
1131	MODULE = Coro::State PACKAGE = Coro	1267	MODULE = Coro::State PACKAGE = Coro
1132		1268
1133	BOOT:	1269	BOOT:
1134	{	1270	{
1135	int i;	1271	int i;
…		…
1141	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1277	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1142	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1278	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1143	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1279	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1144	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1280	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1145		1281
1146	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1282	coro_current = get_sv ("Coro::current", FALSE);
1147	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1283	SvREADONLY_on (coro_current);
1148		1284
1149	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1285	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1150	coro_ready[i] = newAV ();	1286	coro_ready[i] = newAV ();
1151		1287
1152	{	1288	{
1153	SV *sv = perl_get_sv("Coro::API", 1);	1289	SV *sv = perl_get_sv("Coro::API", 1);
1154		1290
1155	coroapi.schedule = api_schedule;	1291	coroapi.schedule = api_schedule;
		1292	coroapi.save = api_save;
1156	coroapi.cede = api_cede;	1293	coroapi.cede = api_cede;
		1294	coroapi.cede_notself = api_cede_notself;
1157	coroapi.ready = api_ready;	1295	coroapi.ready = api_ready;
		1296	coroapi.is_ready = api_is_ready;
1158	coroapi.nready = &coro_nready;	1297	coroapi.nready = &coro_nready;
1159	coroapi.current = coro_current;	1298	coroapi.current = coro_current;
1160		1299
1161	GCoroAPI = &coroapi;	1300	GCoroAPI = &coroapi;
1162	sv_setiv (sv, (IV)&coroapi);	1301	sv_setiv (sv, (IV)&coroapi);
1163	SvREADONLY_on (sv);	1302	SvREADONLY_on (sv);
1164	}	1303	}
1165	}	1304	}
		1305
		1306	void
		1307	_set_current (SV *current)
		1308	PROTOTYPE: $
		1309	CODE:
		1310	SvREFCNT_dec (SvRV (coro_current));
		1311	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1166		1312
1167	int	1313	int
1168	prio (Coro::State coro, int newprio = 0)	1314	prio (Coro::State coro, int newprio = 0)
1169	ALIAS:	1315	ALIAS:
1170	nice = 1	1316	nice = 1
…		…
1173	RETVAL = coro->prio;	1319	RETVAL = coro->prio;
1174		1320
1175	if (items > 1)	1321	if (items > 1)
1176	{	1322	{
1177	if (ix)	1323	if (ix)
1178	newprio += coro->prio;	1324	newprio = coro->prio - newprio;
1179		1325
1180	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1326	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1181	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1327	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1182		1328
1183	coro->prio = newprio;	1329	coro->prio = newprio;
1184	}	1330	}
1185	}	1331	}
		1332	OUTPUT:
		1333	RETVAL
1186		1334
1187	void	1335	SV *
1188	ready (SV *self)	1336	ready (SV *self)
1189	PROTOTYPE: $	1337	PROTOTYPE: $
1190	CODE:	1338	CODE:
1191	api_ready (self);	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
1192		1350
1193	int	1351	int
1194	nready (...)	1352	nready (...)
1195	PROTOTYPE:	1353	PROTOTYPE:
1196	CODE:	1354	CODE:
…		…
1202		1360
1203	SV *	1361	SV *
1204	_get_state ()	1362	_get_state ()
1205	CODE:	1363	CODE:
1206	{	1364	{
1207	struct {	1365	struct io_state *data;
1208	int errorno;
1209	int laststype;
1210	int laststatval;
1211	Stat_t statcache;
1212	} data;
1213		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
1214	data.errorno = errno;	1372	data->errorno = errno;
1215	data.laststype = PL_laststype;	1373	data->laststype = PL_laststype;
1216	data.laststatval = PL_laststatval;	1374	data->laststatval = PL_laststatval;
1217	data.statcache = PL_statcache;	1375	data->statcache = PL_statcache;
1218
1219	RETVAL = newSVpvn ((char *)&data, sizeof data);
1220	}	1376	}
1221	OUTPUT:	1377	OUTPUT:
1222	RETVAL	1378	RETVAL
1223		1379
1224	void	1380	void
1225	_set_state (char *data_)	1381	_set_state (char *data_)
1226	PROTOTYPE: $	1382	PROTOTYPE: $
1227	CODE:	1383	CODE:
1228	{	1384	{
1229	struct {	1385	struct io_state *data = (void *)data_;
1230	int errorno;
1231	int laststype;
1232	int laststatval;
1233	Stat_t statcache;
1234	} *data = (void *)data_;
1235		1386
1236	errno = data->errorno;	1387	errno = data->errorno;
1237	PL_laststype = data->laststype;	1388	PL_laststype = data->laststype;
1238	PL_laststatval = data->laststatval;	1389	PL_laststatval = data->laststatval;
1239	PL_statcache = data->statcache;	1390	PL_statcache = data->statcache;
1240	}	1391	}
		1392

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