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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.95 by root, Sun Nov 26 17:35:42 2006 UTC vs.
Revision 1.143 by root, Wed Feb 28 11:43:03 2007 UTC

1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	#if PERL_VERSION < 6	9	#include <stdio.h>
		10	#include <errno.h>
		11	#include <assert.h>
		12
		13	#ifdef HAVE_MMAP
		14	# include <unistd.h>
		15	# include <sys/mman.h>
		16	# ifndef MAP_ANONYMOUS
		17	# ifdef MAP_ANON
		18	# define MAP_ANONYMOUS MAP_ANON
		19	# else
		20	# undef HAVE_MMAP
		21	# endif
		22	# endif
		23	# include <limits.h>
		24	# ifndef PAGESIZE
		25	# define PAGESIZE pagesize
		26	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		27	static long pagesize;
		28	# else
		29	# define BOOT_PAGESIZE (void)0
		30	# endif
		31	#else
		32	# define PAGESIZE 0
		33	# define BOOT_PAGESIZE (void)0
		34	#endif
		35
		36	#if CORO_USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		39	#else
		40	# define REGISTER_STACK(cctx,start,end)
		41	#endif
		42
		43	/* the maximum number of idle cctx that will be pooled */
		44	#define MAX_IDLE_CCTX 8
		45
		46	#define PERL_VERSION_ATLEAST(a,b,c) \
		47	(PERL_REVISION > (a) \
		48	|| (PERL_REVISION == (a) \
		49	&& (PERL_VERSION > (b) \
		50	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		51
		52	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	53	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	54	# define PL_ppaddr ppaddr
14	# endif	55	# endif
15	# ifndef call_sv	56	# ifndef call_sv
16	# define call_sv perl_call_sv	57	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	68	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	69	# define IS_PADCONST(v) 0
29	# endif	70	# endif
30	#endif	71	#endif
31		72
32	#include <stdio.h>	73	/* 5.8.7 */
33	#include <errno.h>	74	#ifndef SvRV_set
		75	# define SvRV_set(s,v) SvRV(s) = (v)
		76	#endif
34		77
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	78	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	79	# undef CORO_STACKGUARD
37	#endif
38
39	#ifndef STACKGUARD
40	# define STACKGUARD 0
41	#endif
42
43	#ifdef HAVE_MMAP
44	# include <unistd.h>
45	# include <sys/mman.h>
46	# ifndef MAP_ANONYMOUS
47	# ifdef MAP_ANON
48	# define MAP_ANONYMOUS MAP_ANON
49	# else
50	# undef HAVE_MMAP
51	# endif
52	# endif	80	#endif
53	# include <limits.h>	81
54	# ifndef PAGESIZE	82	#ifndef CORO_STACKGUARD
55	# define PAGESIZE pagesize	83	# define CORO_STACKGUARD 0
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif	84	#endif
		85
		86	/* prefer perl internal functions over our own? */
		87	#ifndef CORO_PREFER_PERL_FUNCTIONS
		88	# define CORO_PREFER_PERL_FUNCTIONS 0
61	#endif	89	#endif
62		90
63	/* 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
64	* 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
65	* and should be unique. */	93	* and should be unique. */
66	#define dSTACKLEVEL int stacklevel	94	#define dSTACKLEVEL int stacklevel
67	#define STACKLEVEL ((void *)&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
		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))
		108
71	#include "CoroAPI.h"	109	#include "CoroAPI.h"
72
73	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74		110
75	#ifdef USE_ITHREADS	111	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	112	static perl_mutex coro_mutex;
77	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	113	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	114	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
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
		134	static struct coro_cctx *cctx_first;
		135	static int cctx_count, cctx_idle;
		136
89	/* this is a structure representing a c-level coroutine */	137	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	138	typedef struct coro_cctx {
91	struct coro_stack *next;	139	struct coro_cctx *next;
92		140
93	/* the stack */	141	/* the stack */
94	void *sptr;	142	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	143	ssize_t ssize; /* positive == mmap, otherwise malloc */
96		144
97	/* cpu state */	145	/* cpu state */
98	void *idle_sp; /* original stacklevel when coroutine was created */	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 */
99	JMPENV *top_env;	148	JMPENV *top_env;
100	coro_context cctx;	149	coro_context cctx;
101	} coro_stack;	150
		151	int inuse;
		152
		153	#if CORO_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	};
102		164
103	/* this is a structure representing a perl-level coroutine */	165	/* this is a structure representing a perl-level coroutine */
104	struct coro {	166	struct coro {
105	/* the c coroutine allocated to this perl coroutine, if any */	167	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	168	coro_cctx *cctx;
107		169
108	/* data associated with this coroutine (initial args) */	170	/* data associated with this coroutine (initial args) */
109	AV *args;	171	AV *args;
110	int refcnt;	172	int refcnt;
		173	int save; /* CORO_SAVE flags */
		174	int flags; /* CF_ flags */
111		175
112	/* optionally saved, might be zero */	176	/* optionally saved, might be zero */
113	AV *defav;	177	AV *defav; /* @_ */
114	SV *defsv;	178	SV *defsv; /* $_ */
115	SV *errsv;	179	SV *errsv; /* $@ */
		180	SV *irssv; /* $/ */
		181	SV *irssv_sv; /* real $/ cache */
116		182
117	/* saved global state not related to stacks */	183	#define VAR(name,type) type name;
118	U8 dowarn;	184	# include "state.h"
119	I32 in_eval;	185	#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		186
151	/* coro process data */	187	/* coro process data */
152	int prio;	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 CORO_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		340
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	341	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	342	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	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	}
309		355
310	{	356	{
311	dSP;	357	dSP;
312	CV *cv;	358	CV *cv;
313		359
314	/* now do the ugly restore mess */	360	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	361	while ((cv = (CV *)POPs))
316	{	362	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	363	put_padlist (cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	364	CvDEPTH (cv) = PTR2IV (POPs);
323	}	365	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	366	}
327		367
328	PUTBACK;	368	PUTBACK;
329	}	369	}
		370	assert (!PL_comppad || AvARRAY (PL_comppad));//D
330	}	371	}
331		372
332	static void	373	static void
333	save_state(pTHX_ Coro__State c, int flags)	374	save_perl (Coro__State c)
334	{	375	{
		376	assert (!PL_comppad || AvARRAY (PL_comppad));//D
335	{	377	{
336	dSP;	378	dSP;
337	I32 cxix = cxstack_ix;	379	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	380	PERL_CONTEXT *ccstk = cxstack;
339	PERL_SI *top_si = PL_curstackinfo;	381	PERL_SI *top_si = PL_curstackinfo;
…		…
341	/*	383	/*
342	* the worst thing you can imagine happens first - we have to save	384	* the worst thing you can imagine happens first - we have to save
343	* (and reinitialize) all cv's in the whole callchain :(	385	* (and reinitialize) all cv's in the whole callchain :(
344	*/	386	*/
345		387
		388	EXTEND (SP, 3 + 1);
346	PUSHs (Nullsv);	389	PUSHs (Nullsv);
347	/* this loop was inspired by pp_caller */	390	/* this loop was inspired by pp_caller */
348	for (;;)	391	for (;;)
349	{	392	{
350	while (cxix >= 0)	393	while (cxix >= 0)
351	{	394	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	395	PERL_CONTEXT *cx = &ccstk[cxix--];
353		396
354	if (CxTYPE(cx) == CXt_SUB)	397	if (CxTYPE (cx) == CXt_SUB)
355	{	398	{
356	CV *cv = cx->blk_sub.cv;	399	CV *cv = cx->blk_sub.cv;
		400
357	if (CvDEPTH(cv))	401	if (CvDEPTH (cv))
358	{	402	{
359	EXTEND (SP, CvDEPTH(cv)*2);	403	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));	404	PUSHs ((SV *)CvPADLIST (cv));
		405	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	406	PUSHs ((SV *)cv);
370		407
		408	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	409	get_padlist (cv);
372	}	410	}
373	}	411	}
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	}	412	}
383		413
384	if (top_si->si_type == PERLSI_MAIN)	414	if (top_si->si_type == PERLSI_MAIN)
385	break;	415	break;
386		416
…		…
390	}	420	}
391		421
392	PUTBACK;	422	PUTBACK;
393	}	423	}
394		424
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	425	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	426	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	427	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		428	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
398		429
399	c->dowarn = PL_dowarn;	430	#define VAR(name,type)c->name = PL_ ## name;
400	c->in_eval = PL_in_eval;	431	# include "state.h"
401		432	#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	}	433	}
433		434
434	/*	435	/*
435	* allocate various perl stacks. This is an exact copy	436	* allocate various perl stacks. This is an exact copy
436	* of perl.c:init_stacks, except that it uses less memory	437	* of perl.c:init_stacks, except that it uses less memory
437	* on the (sometimes correct) assumption that coroutines do	438	* on the (sometimes correct) assumption that coroutines do
438	* not usually need a lot of stackspace.	439	* not usually need a lot of stackspace.
439	*/	440	*/
		441	#if CORO_PREFER_PERL_FUNCTIONS
		442	# define coro_init_stacks init_stacks
		443	#else
440	static void	444	static void
441	coro_init_stacks (pTHX)	445	coro_init_stacks ()
442	{	446	{
443	LOCK;
444
445	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	447	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
446	PL_curstackinfo->si_type = PERLSI_MAIN;	448	PL_curstackinfo->si_type = PERLSI_MAIN;
447	PL_curstack = PL_curstackinfo->si_stack;	449	PL_curstack = PL_curstackinfo->si_stack;
448	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449		451
450	PL_stack_base = AvARRAY(PL_curstack);	452	PL_stack_base = AvARRAY(PL_curstack);
451	PL_stack_sp = PL_stack_base;	453	PL_stack_sp = PL_stack_base;
452	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453		455
454	New(50,PL_tmps_stack,96,SV*);	456	New(50,PL_tmps_stack,128,SV*);
455	PL_tmps_floor = -1;	457	PL_tmps_floor = -1;
456	PL_tmps_ix = -1;	458	PL_tmps_ix = -1;
457	PL_tmps_max = 96;	459	PL_tmps_max = 128;
458		460
459	New(54,PL_markstack,16,I32);	461	New(54,PL_markstack,32,I32);
460	PL_markstack_ptr = PL_markstack;	462	PL_markstack_ptr = PL_markstack;
461	PL_markstack_max = PL_markstack + 16;	463	PL_markstack_max = PL_markstack + 32;
462		464
463	#ifdef SET_MARK_OFFSET	465	#ifdef SET_MARK_OFFSET
464	SET_MARK_OFFSET;	466	SET_MARK_OFFSET;
465	#endif	467	#endif
466		468
467	New(54,PL_scopestack,16,I32);	469	New(54,PL_scopestack,32,I32);
468	PL_scopestack_ix = 0;	470	PL_scopestack_ix = 0;
469	PL_scopestack_max = 16;	471	PL_scopestack_max = 32;
470		472
471	New(54,PL_savestack,96,ANY);	473	New(54,PL_savestack,64,ANY);
472	PL_savestack_ix = 0;	474	PL_savestack_ix = 0;
473	PL_savestack_max = 96;	475	PL_savestack_max = 64;
474		476
475	#if PERL_VERSION < 9	477	#if !PERL_VERSION_ATLEAST (5,9,0)
476	New(54,PL_retstack,8,OP*);	478	New(54,PL_retstack,16,OP*);
477	PL_retstack_ix = 0;	479	PL_retstack_ix = 0;
478	PL_retstack_max = 8;	480	PL_retstack_max = 16;
479	#endif	481	#endif
480
481	UNLOCK;
482	}	482	}
		483	#endif
483		484
484	/*	485	/*
485	* destroy the stacks, the callchain etc...	486	* destroy the stacks, the callchain etc...
486	*/	487	*/
487	static void	488	static void
488	destroy_stacks(pTHX)	489	coro_destroy_stacks ()
489	{	490	{
490	if (!IN_DESTRUCT)	491	if (!IN_DESTRUCT)
491	{	492	{
492	/* is this ugly, I ask? */	493	/* restore all saved variables and stuff */
493	LEAVE_SCOPE (0);	494	LEAVE_SCOPE (0);
		495	assert (PL_tmps_floor == -1);
494		496
495	/* sure it is, but more important: is it correct?? :/ */	497	/* free all temporaries */
496	FREETMPS;	498	FREETMPS;
		499	assert (PL_tmps_ix == -1);
497		500
		501	/* unwind all extra stacks */
498	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	502	POPSTACK_TO (PL_mainstack);
		503
		504	/* unwind main stack */
		505	dounwind (-1);
499	}	506	}
500		507
501	while (PL_curstackinfo->si_next)	508	while (PL_curstackinfo->si_next)
502	PL_curstackinfo = PL_curstackinfo->si_next;	509	PL_curstackinfo = PL_curstackinfo->si_next;
503		510
504	while (PL_curstackinfo)	511	while (PL_curstackinfo)
505	{	512	{
506	PERL_SI *p = PL_curstackinfo->si_prev;	513	PERL_SI *p = PL_curstackinfo->si_prev;
507		514
508	{ /*D*//*remove*/
509	dSP;
510	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511	PUTBACK; /* possibly superfluous */
512	}
513
514	if (!IN_DESTRUCT)	515	if (!IN_DESTRUCT)
515	{
516	dounwind (-1);/*D*//*remove*/
517	SvREFCNT_dec (PL_curstackinfo->si_stack);	516	SvREFCNT_dec (PL_curstackinfo->si_stack);
518	}
519		517
520	Safefree (PL_curstackinfo->si_cxstack);	518	Safefree (PL_curstackinfo->si_cxstack);
521	Safefree (PL_curstackinfo);	519	Safefree (PL_curstackinfo);
522	PL_curstackinfo = p;	520	PL_curstackinfo = p;
523	}	521	}
524		522
525	Safefree (PL_tmps_stack);	523	Safefree (PL_tmps_stack);
526	Safefree (PL_markstack);	524	Safefree (PL_markstack);
527	Safefree (PL_scopestack);	525	Safefree (PL_scopestack);
528	Safefree (PL_savestack);	526	Safefree (PL_savestack);
529	#if PERL_VERSION < 9	527	#if !PERL_VERSION_ATLEAST (5,9,0)
530	Safefree (PL_retstack);	528	Safefree (PL_retstack);
531	#endif	529	#endif
532	}	530	}
		531
		532	/** coroutine stack handling ************************************************/
533		533
534	static void	534	static void
535	setup_coro (struct coro *coro)	535	setup_coro (struct coro *coro)
536	{	536	{
537	/*	537	/*
538	* emulate part of the perl startup here.	538	* emulate part of the perl startup here.
539	*/	539	*/
540	dTHX;	540
		541	coro_init_stacks ();
		542
		543	PL_curcop = &PL_compiling;
		544	PL_in_eval = EVAL_NULL;
		545	PL_comppad = 0;
		546	PL_curpm = 0;
		547	PL_localizing = 0;
		548	PL_dirty = 0;
		549	PL_restartop = 0;
		550
		551	{
		552	dSP;
		553	LOGOP myop;
		554
		555	SvREFCNT_dec (GvAV (PL_defgv));
		556	GvAV (PL_defgv) = coro->args; coro->args = 0;
		557
		558	Zero (&myop, 1, LOGOP);
		559	myop.op_next = Nullop;
		560	myop.op_flags = OPf_WANT_VOID;
		561
		562	PUSHMARK (SP);
		563	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		564	PUTBACK;
		565	PL_op = (OP *)&myop;
		566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		567	SPAGAIN;
		568	}
		569
		570	ENTER; /* necessary e.g. for dounwind */
		571	}
		572
		573	static void
		574	free_coro_mortal ()
		575	{
		576	if (coro_mortal)
		577	{
		578	SvREFCNT_dec (coro_mortal);
		579	coro_mortal = 0;
		580	}
		581	}
		582
		583	/* inject a fake call to Coro::State::_cctx_init into the execution */
		584	static void NOINLINE
		585	prepare_cctx (coro_cctx *cctx)
		586	{
541	dSP;	587	dSP;
542	UNOP myop;	588	LOGOP myop;
543	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
544		589
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);	590	Zero (&myop, 1, LOGOP);
554	myop.op_next = Nullop;	591	myop.op_next = PL_op;
555	myop.op_flags = OPf_WANT_VOID;	592	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
556		593
		594	PUSHMARK (SP);
		595	EXTEND (SP, 2);
		596	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		597	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		598	PUTBACK;
557	PL_op = (OP *)&myop;	599	PL_op = (OP *)&myop;
558
559	PUSHMARK(SP);
560	XPUSHs (sub_init);
561	PUTBACK;
562	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	600	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
563	SPAGAIN;	601	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	SvREFCNT_dec (coro_mortal);
574	coro_mortal = 0;
575	}
576	}	602	}
577		603
578	static void	604	static void
579	coro_run (void *arg)	605	coro_run (void *arg)
580	{	606	{
		607	/* coro_run is the alternative tail of transfer(), so unlock here. */
		608	UNLOCK;
		609
581	/*	610	/*
582	* this is a _very_ stripped down perl interpreter ;)	611	* this is a _very_ stripped down perl interpreter ;)
583	*/	612	*/
584	dTHX;
585	int ret;
586
587	UNLOCK;
588
589	PL_top_env = &PL_start_env;	613	PL_top_env = &PL_start_env;
590		614
591	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));	615	/* inject call to cctx_init */
592	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));	616	prepare_cctx ((coro_cctx *)arg);
593
594	/* continue at cctx_init, without entersub */
595	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
596		617
597	/* somebody will hit me for both perl_run and PL_restartop */	618	/* somebody will hit me for both perl_run and PL_restartop */
598	ret = perl_run (aTHX_ PERL_GET_CONTEXT);	619	PL_restartop = PL_op;
599	printf ("ret %d\n", ret);//D	620	perl_run (PL_curinterp);
600		621
601	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);	622	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
602	abort ();	623	abort ();
603	}	624	}
604		625
605	static coro_stack *	626	static coro_cctx *
606	stack_new ()	627	cctx_new ()
607	{	628	{
608	coro_stack *stack;	629	coro_cctx *cctx;
609		630
		631	++cctx_count;
		632
610	New (0, stack, 1, coro_stack);	633	Newz (0, cctx, 1, coro_cctx);
611		634
612	#if HAVE_MMAP	635	#if HAVE_MMAP
613		636
614	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	637	cctx->ssize = ((CORO_STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
615	/* mmap suppsedly does allocate-on-write for us */	638	/* mmap supposedly does allocate-on-write for us */
616	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	639	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
617		640
618	if (stack->sptr == (void *)-1)	641	if (cctx->sptr != (void *)-1)
619	{
620	perror ("FATAL: unable to mmap stack for coroutine");
621	_exit (EXIT_FAILURE);
622	}	642	{
623
624	# if STACKGUARD	643	# if CORO_STACKGUARD
625	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	644	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
626	# endif	645	# endif
		646	REGISTER_STACK (
		647	cctx,
		648	CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		649	cctx->ssize + (char *)cctx->sptr
		650	);
627		651
628	#else	652	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
629		653	}
		654	else
		655	#endif
		656	{
630	stack->ssize = STACKSIZE * (long)sizeof (long);	657	cctx->ssize = -CORO_STACKSIZE * (long)sizeof (long);
631	New (0, stack->sptr, STACKSIZE, long);	658	New (0, cctx->sptr, CORO_STACKSIZE, long);
632		659
633	if (!stack->sptr)	660	if (!cctx->sptr)
634	{	661	{
635	perror (stderr, "FATAL: unable to malloc stack for coroutine");	662	perror ("FATAL: unable to allocate stack for coroutine");
636	_exit (EXIT_FAILURE);	663	_exit (EXIT_FAILURE);
637	}	664	}
638		665
639	#endif	666	REGISTER_STACK (
		667	cctx,
		668	(char *)cctx->sptr,
		669	(char *)cctx->sptr - cctx->ssize
		670	);
640		671
641	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	672	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, -cctx->ssize);
		673	}
642		674
643	return stack;	675	return cctx;
644	}	676	}
645		677
646	static void	678	static void
647	stack_free (coro_stack *stack)	679	cctx_destroy (coro_cctx *cctx)
648	{	680	{
649	if (!stack)	681	if (!cctx)
650	return;	682	return;
651		683
		684	--cctx_count;
		685
		686	#if CORO_USE_VALGRIND
		687	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		688	#endif
		689
652	#if HAVE_MMAP	690	#if HAVE_MMAP
		691	if (cctx->ssize > 0)
653	munmap (stack->sptr, stack->ssize);	692	munmap (cctx->sptr, cctx->ssize);
654	#else	693	else
		694	#endif
655	Safefree (stack->sptr);	695	Safefree (cctx->sptr);
656	#endif
657		696
658	Safefree (stack);	697	Safefree (cctx);
659	}	698	}
660		699
661	static coro_stack *stack_first;
662
663	static coro_stack *	700	static coro_cctx *
664	stack_get ()	701	cctx_get ()
665	{	702	{
666	coro_stack *stack;	703	coro_cctx *cctx;
667		704
668	if (stack_first)	705	if (cctx_first)
669	{	706	{
670	stack = stack_first;	707	cctx = cctx_first;
671	stack_first = stack->next;	708	cctx_first = cctx->next;
		709	--cctx_idle;
672	}	710	}
673	else	711	else
674	{	712	{
675	stack = stack_new ();	713	cctx = cctx_new ();
676	PL_op = PL_op->op_next;	714	PL_op = PL_op->op_next;
677	}	715	}
678		716
679	return stack;	717	return cctx;
680	}	718	}
681		719
682	static void	720	static void
683	stack_put (coro_stack *stack)	721	cctx_put (coro_cctx *cctx)
684	{	722	{
685	stack->next = stack_first;	723	/* free another cctx if overlimit */
686	stack_first = stack;	724	if (cctx_idle >= MAX_IDLE_CCTX)
		725	{
		726	coro_cctx *first = cctx_first;
		727	cctx_first = first->next;
		728	--cctx_idle;
		729
		730	assert (!first->inuse);
		731	cctx_destroy (first);
		732	}
		733
		734	++cctx_idle;
		735	cctx->next = cctx_first;
		736	cctx_first = cctx;
687	}	737	}
		738
		739	/** coroutine switching *****************************************************/
688		740
689	/* never call directly, always through the coro_state_transfer global variable */	741	/* never call directly, always through the coro_state_transfer global variable */
690	static void	742	static void NOINLINE
691	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	743	transfer (struct coro *prev, struct coro *next)
692	{	744	{
693	dSTACKLEVEL;	745	dSTACKLEVEL;
694		746
695	/* sometimes transfer is only called to set idle_sp */	747	/* sometimes transfer is only called to set idle_sp */
696	if (flags == TRANSFER_SET_STACKLEVEL)	748	if (!next)
		749	{
697	((coro_stack *)prev)->idle_sp = STACKLEVEL;	750	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		751	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		752	}
698	else if (prev != next)	753	else if (prev != next)
699	{	754	{
700	coro_stack *prev__stack;	755	coro_cctx *prev__cctx;
		756
		757	if (prev->flags & CF_NEW)
		758	{
		759	/* create a new empty context */
		760	Newz (0, prev->cctx, 1, coro_cctx);
		761	prev->cctx->inuse = 1;
		762	prev->flags &= ~CF_NEW;
		763	prev->flags |= CF_RUNNING;
		764	}
		765
		766	/*TODO: must not croak here */
		767	if (!prev->flags & CF_RUNNING)
		768	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		769
		770	if (next->flags & CF_RUNNING)
		771	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		772
		773	if (next->flags & CF_DESTROYED)
		774	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		775
		776	prev->flags &= ~CF_RUNNING;
		777	next->flags |= CF_RUNNING;
701		778
702	LOCK;	779	LOCK;
703		780
704	if (next->mainstack)	781	if (next->flags & CF_NEW)
705	{	782	{
706	/* coroutine already started */	783	/* need to start coroutine */
707	SAVE (prev, flags);	784	next->flags &= ~CF_NEW;
708	LOAD (next);	785	/* first get rid of the old state */
		786	save_perl (prev);
		787	/* setup coroutine call */
		788	setup_coro (next);
		789	/* need a new stack */
		790	assert (!next->cctx);
709	}	791	}
710	else	792	else
711	{	793	{
712	/* need to start coroutine */	794	/* coroutine already started */
713	/* first get rid of the old state */	795	save_perl (prev);
714	SAVE (prev, -1);	796	load_perl (next);
715	/* setup coroutine call */
716	setup_coro (next);
717	/* need a stack */
718	next->stack = 0;
719	}	797	}
720		798
721	if (!prev->stack)
722	/* create a new empty context */
723	Newz (0, prev->stack, 1, coro_stack);
724
725	prev__stack = prev->stack;	799	prev__cctx = prev->cctx;
726		800
727	/* possibly "free" the stack */	801	/* possibly "free" the cctx */
728	if (prev__stack->idle_sp == STACKLEVEL)	802	if (prev__cctx->idle_sp == STACKLEVEL)
729	{	803	{
730	stack_put (prev__stack);	804	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		805	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		806
731	prev->stack = 0;	807	prev->cctx = 0;
		808
		809	cctx_put (prev__cctx);
		810	prev__cctx->inuse = 0;
732	}	811	}
733		812
734	if (!next->stack)	813	if (!next->cctx)
735	next->stack = stack_get ();
736
737	if (prev__stack != next->stack)
738	{	814	{
739	prev__stack->top_env = PL_top_env;	815	next->cctx = cctx_get ();
740	PL_top_env = next->stack->top_env;	816	assert (!next->cctx->inuse);
741	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	817	next->cctx->inuse = 1;
742	}	818	}
743		819
		820	if (prev__cctx != next->cctx)
		821	{
		822	prev__cctx->top_env = PL_top_env;
		823	PL_top_env = next->cctx->top_env;
		824	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		825	}
		826
744	free_coro_mortal ();	827	free_coro_mortal ();
745
746	UNLOCK;	828	UNLOCK;
747	}	829	}
748	}	830	}
749		831
750	/* use this function pointer to call the above function */
751	/* this is done to increase chances of the compiler not inlining the call */
752	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
753	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
754
755	struct transfer_args	832	struct transfer_args
756	{	833	{
757	struct coro *prev, *next;	834	struct coro *prev, *next;
758	int flags;
759	};	835	};
760		836
761	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	837	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
762		838
		839	/** high level stuff ********************************************************/
		840
763	static void	841	static int
764	coro_state_destroy (struct coro *coro)	842	coro_state_destroy (struct coro *coro)
765	{	843	{
766	if (coro->refcnt--)	844	if (coro->flags & CF_DESTROYED)
767	return;	845	return 0;
		846
		847	coro->flags |= CF_DESTROYED;
		848
		849	if (coro->flags & CF_READY)
		850	{
		851	/* reduce nready, as destroying a ready coro effectively unreadies it */
		852	/* alternative: look through all ready queues and remove the coro */
		853	LOCK;
		854	--coro_nready;
		855	UNLOCK;
		856	}
		857	else
		858	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
768		859
769	if (coro->mainstack && coro->mainstack != main_mainstack)	860	if (coro->mainstack && coro->mainstack != main_mainstack)
770	{	861	{
771	struct coro temp;	862	struct coro temp;
772		863
773	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	864	assert (!(coro->flags & CF_RUNNING));
774	LOAD (aTHX_ coro);
775		865
		866	Zero (&temp, 1, struct coro);
		867	temp.save = CORO_SAVE_ALL;
		868
		869	if (coro->flags & CF_RUNNING)
		870	croak ("FATAL: tried to destroy currently running coroutine");
		871
		872	save_perl (&temp);
		873	load_perl (coro);
		874
776	destroy_stacks (aTHX);	875	coro_destroy_stacks ();
777		876
778	LOAD ((&temp)); /* this will get rid of defsv etc.. */	877	load_perl (&temp); /* this will get rid of defsv etc.. */
779		878
780	coro->mainstack = 0;	879	coro->mainstack = 0;
781	}	880	}
782		881
783	stack_free (coro->stack);	882	cctx_destroy (coro->cctx);
784	SvREFCNT_dec (coro->args);	883	SvREFCNT_dec (coro->args);
785	Safefree (coro);	884
		885	return 1;
786	}	886	}
787		887
788	static int	888	static int
789	coro_state_clear (SV *sv, MAGIC *mg)	889	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
790	{	890	{
791	struct coro *coro = (struct coro *)mg->mg_ptr;	891	struct coro *coro = (struct coro *)mg->mg_ptr;
792	mg->mg_ptr = 0;	892	mg->mg_ptr = 0;
793		893
		894	if (--coro->refcnt < 0)
		895	{
794	coro_state_destroy (coro);	896	coro_state_destroy (coro);
		897	Safefree (coro);
		898	}
795		899
796	return 0;	900	return 0;
797	}	901	}
798		902
799	static int	903	static int
800	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	904	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
801	{	905	{
802	struct coro *coro = (struct coro *)mg->mg_ptr;	906	struct coro *coro = (struct coro *)mg->mg_ptr;
803		907
804	++coro->refcnt;	908	++coro->refcnt;
805		909
806	return 0;	910	return 0;
807	}	911	}
808		912
809	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	913	static MGVTBL coro_state_vtbl = {
		914	0, 0, 0, 0,
		915	coro_state_free,
		916	0,
		917	#ifdef MGf_DUP
		918	coro_state_dup,
		919	#else
		920	# define MGf_DUP 0
		921	#endif
		922	};
810		923
811	static struct coro *	924	static struct coro *
812	SvSTATE (SV *coro)	925	SvSTATE (SV *coro)
813	{	926	{
814	HV *stash;	927	HV *stash;
…		…
829	assert (mg->mg_type == PERL_MAGIC_ext);	942	assert (mg->mg_type == PERL_MAGIC_ext);
830	return (struct coro *)mg->mg_ptr;	943	return (struct coro *)mg->mg_ptr;
831	}	944	}
832		945
833	static void	946	static void
834	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	947	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
835	{	948	{
836	ta->prev = SvSTATE (prev);	949	ta->prev = SvSTATE (prev_sv);
837	ta->next = SvSTATE (next);	950	ta->next = SvSTATE (next_sv);
838	ta->flags = flags;
839	}	951	}
840		952
841	static void	953	static void
842	api_transfer (SV *prev, SV *next, int flags)	954	api_transfer (SV *prev_sv, SV *next_sv)
843	{	955	{
844	dTHX;
845	struct transfer_args ta;	956	struct transfer_args ta;
846		957
847	prepare_transfer (aTHX_ &ta, prev, next, flags);	958	prepare_transfer (&ta, prev_sv, next_sv);
848	TRANSFER (ta);	959	TRANSFER (ta);
849	}	960	}
850		961
		962	static int
		963	api_save (SV *coro_sv, int new_save)
		964	{
		965	struct coro *coro = SvSTATE (coro_sv);
		966	int old_save = coro->save;
		967
		968	if (new_save >= 0)
		969	coro->save = new_save;
		970
		971	return old_save;
		972	}
		973
851	/** Coro ********************************************************************/	974	/** Coro ********************************************************************/
852		975
853	#define PRIO_MAX 3
854	#define PRIO_HIGH 1
855	#define PRIO_NORMAL 0
856	#define PRIO_LOW -1
857	#define PRIO_IDLE -3
858	#define PRIO_MIN -4
859
860	/* for Coro.pm */
861	static GV *coro_current, *coro_idle;
862	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863	static int coro_nready;
864
865	static void	976	static void
866	coro_enq (pTHX_ SV *sv)	977	coro_enq (SV *coro_sv)
867	{	978	{
868	int prio;
869
870	if (SvTYPE (sv) != SVt_PVHV)
871	croak ("Coro::ready tried to enqueue something that is not a coroutine");
872
873	prio = SvSTATE (sv)->prio;
874
875	av_push (coro_ready [prio - PRIO_MIN], sv);	979	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
876	coro_nready++;
877	}	980	}
878		981
879	static SV *	982	static SV *
880	coro_deq (pTHX_ int min_prio)	983	coro_deq (int min_prio)
881	{	984	{
882	int prio = PRIO_MAX - PRIO_MIN;	985	int prio = PRIO_MAX - PRIO_MIN;
883		986
884	min_prio -= PRIO_MIN;	987	min_prio -= PRIO_MIN;
885	if (min_prio < 0)	988	if (min_prio < 0)
886	min_prio = 0;	989	min_prio = 0;
887		990
888	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	991	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
889	if (AvFILLp (coro_ready [prio]) >= 0)	992	if (AvFILLp (coro_ready [prio]) >= 0)
890	{
891	coro_nready--;
892	return av_shift (coro_ready [prio]);	993	return av_shift (coro_ready [prio]);
893	}
894		994
895	return 0;	995	return 0;
896	}	996	}
897		997
898	static void	998	static int
899	api_ready (SV *coro)	999	api_ready (SV *coro_sv)
900	{	1000	{
901	dTHX;	1001	struct coro *coro;
902		1002
903	if (SvROK (coro))	1003	if (SvROK (coro_sv))
904	coro = SvRV (coro);	1004	coro_sv = SvRV (coro_sv);
		1005
		1006	coro = SvSTATE (coro_sv);
		1007
		1008	if (coro->flags & CF_READY)
		1009	return 0;
		1010
		1011	coro->flags |= CF_READY;
905		1012
906	LOCK;	1013	LOCK;
907	coro_enq (aTHX_ SvREFCNT_inc (coro));	1014	coro_enq (SvREFCNT_inc (coro_sv));
		1015	++coro_nready;
908	UNLOCK;	1016	UNLOCK;
909	}
910		1017
		1018	return 1;
		1019	}
		1020
911	static void	1021	static int
		1022	api_is_ready (SV *coro_sv)
		1023	{
		1024	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1025	}
		1026
		1027	static void
912	prepare_schedule (aTHX_ struct transfer_args *ta)	1028	prepare_schedule (struct transfer_args *ta)
913	{	1029	{
914	SV *current, *prev, *next;	1030	SV *prev_sv, *next_sv;
		1031
		1032	for (;;)
		1033	{
		1034	LOCK;
		1035	next_sv = coro_deq (PRIO_MIN);
		1036
		1037	/* nothing to schedule: call the idle handler */
		1038	if (!next_sv)
		1039	{
		1040	dSP;
		1041	UNLOCK;
		1042
		1043	ENTER;
		1044	SAVETMPS;
		1045
		1046	PUSHMARK (SP);
		1047	PUTBACK;
		1048	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1049
		1050	FREETMPS;
		1051	LEAVE;
		1052	continue;
		1053	}
		1054
		1055	ta->next = SvSTATE (next_sv);
		1056
		1057	/* cannot transfer to destroyed coros, skip and look for next */
		1058	if (ta->next->flags & CF_DESTROYED)
		1059	{
		1060	UNLOCK;
		1061	SvREFCNT_dec (next_sv);
		1062	/* coro_nready is already taken care of by destroy */
		1063	continue;
		1064	}
		1065
		1066	--coro_nready;
		1067	UNLOCK;
		1068	break;
		1069	}
		1070
		1071	/* free this only after the transfer */
		1072	prev_sv = SvRV (coro_current);
		1073	SvRV_set (coro_current, next_sv);
		1074	ta->prev = SvSTATE (prev_sv);
		1075
		1076	assert (ta->next->flags & CF_READY);
		1077	ta->next->flags &= ~CF_READY;
915		1078
916	LOCK;	1079	LOCK;
917
918	current = GvSV (coro_current);
919
920	for (;;)
921	{
922	LOCK;
923
924	next = coro_deq (aTHX_ PRIO_MIN);
925
926	if (next)
927	break;
928
929	UNLOCK;
930
931	{
932	dSP;
933
934	ENTER;
935	SAVETMPS;
936
937	PUSHMARK (SP);
938	PUTBACK;
939	call_sv (GvSV (coro_idle), G_DISCARD);
940
941	FREETMPS;
942	LEAVE;
943	}
944	}
945
946	prev = SvRV (current);
947	SvRV (current) = next;
948
949	/* free this only after the transfer */
950	free_coro_mortal ();	1080	free_coro_mortal ();
951	coro_mortal = prev;	1081	coro_mortal = prev_sv;
952
953	ta->prev = SvSTATE (prev);
954	ta->next = SvSTATE (next);
955	ta->flags = TRANSFER_SAVE_ALL;
956
957	UNLOCK;	1082	UNLOCK;
958	}	1083	}
959		1084
960	static void	1085	static void
961	prepare_cede (aTHX_ struct transfer_args *ta)	1086	prepare_cede (struct transfer_args *ta)
962	{	1087	{
963	LOCK;	1088	api_ready (coro_current);
964	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965	UNLOCK;
966
967	prepare_schedule (ta);	1089	prepare_schedule (ta);
968	}	1090	}
969		1091
		1092	static int
		1093	prepare_cede_notself (struct transfer_args *ta)
		1094	{
		1095	if (coro_nready)
		1096	{
		1097	SV *prev = SvRV (coro_current);
		1098	prepare_schedule (ta);
		1099	api_ready (prev);
		1100	return 1;
		1101	}
		1102	else
		1103	return 0;
		1104	}
		1105
970	static void	1106	static void
971	api_schedule (void)	1107	api_schedule (void)
972	{	1108	{
973	dTHX;
974	struct transfer_args ta;	1109	struct transfer_args ta;
975		1110
976	prepare_schedule (&ta);	1111	prepare_schedule (&ta);
977	TRANSFER (ta);	1112	TRANSFER (ta);
978	}	1113	}
979		1114
980	static void	1115	static int
981	api_cede (void)	1116	api_cede (void)
982	{	1117	{
983	dTHX;
984	struct transfer_args ta;	1118	struct transfer_args ta;
985		1119
986	prepare_cede (&ta);	1120	prepare_cede (&ta);
		1121
		1122	if (ta.prev != ta.next)
		1123	{
987	TRANSFER (ta);	1124	TRANSFER (ta);
		1125	return 1;
		1126	}
		1127	else
		1128	return 0;
		1129	}
		1130
		1131	static int
		1132	api_cede_notself (void)
		1133	{
		1134	struct transfer_args ta;
		1135
		1136	if (prepare_cede_notself (&ta))
		1137	{
		1138	TRANSFER (ta);
		1139	return 1;
		1140	}
		1141	else
		1142	return 0;
988	}	1143	}
989		1144
990	MODULE = Coro::State PACKAGE = Coro::State	1145	MODULE = Coro::State PACKAGE = Coro::State
991		1146
992	PROTOTYPES: DISABLE	1147	PROTOTYPES: DISABLE
…		…
998	#endif	1153	#endif
999	BOOT_PAGESIZE;	1154	BOOT_PAGESIZE;
1000		1155
1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1156	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002		1157
1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1158	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1159	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1160	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1161	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1162	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1006		1163
1007	main_mainstack = PL_mainstack;	1164	main_mainstack = PL_mainstack;
1008		1165
1009	coroapi.ver = CORO_API_VERSION;	1166	coroapi.ver = CORO_API_VERSION;
1010	coroapi.transfer = api_transfer;	1167	coroapi.transfer = api_transfer;
…		…
1020	HV *hv;	1177	HV *hv;
1021	int i;	1178	int i;
1022		1179
1023	Newz (0, coro, 1, struct coro);	1180	Newz (0, coro, 1, struct coro);
1024	coro->args = newAV ();	1181	coro->args = newAV ();
		1182	coro->save = CORO_SAVE_ALL;
		1183	coro->flags = CF_NEW;
1025		1184
1026	hv = newHV ();	1185	hv = newHV ();
1027	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1186	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1028	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1187	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029		1188
1030	for (i = 1; i < items; i++)	1189	for (i = 1; i < items; i++)
1031	av_push (coro->args, newSVsv (ST (i)));	1190	av_push (coro->args, newSVsv (ST (i)));
1032
1033	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1034	/*coro->stack = 0;*/
1035	}	1191	}
1036	OUTPUT:	1192	OUTPUT:
		1193	RETVAL
		1194
		1195	int
		1196	save (SV *coro, int new_save = -1)
		1197	CODE:
		1198	RETVAL = api_save (coro, new_save);
		1199	OUTPUT:
1037	RETVAL	1200	RETVAL
1038		1201
1039	void	1202	void
1040	_set_stacklevel (...)	1203	_set_stacklevel (...)
1041	ALIAS:	1204	ALIAS:
1042	Coro::State::transfer = 1	1205	Coro::State::transfer = 1
1043	Coro::schedule = 2	1206	Coro::schedule = 2
1044	Coro::cede = 3	1207	Coro::cede = 3
1045	Coro::Cont::yield = 4	1208	Coro::cede_notself = 4
1046	CODE:	1209	CODE:
1047	{	1210	{
1048	struct transfer_args ta;	1211	struct transfer_args ta;
1049		1212
1050	switch (ix)	1213	switch (ix)
1051	{	1214	{
1052	case 0:	1215	case 0:
1053	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1216	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1054	ta.next = 0;	1217	ta.next = 0;
1055	ta.flags = TRANSFER_SET_STACKLEVEL;
1056	break;	1218	break;
1057		1219
1058	case 1:	1220	case 1:
1059	if (items != 3)	1221	if (items != 2)
1060	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1222	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1061		1223
1062	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1224	prepare_transfer (&ta, ST (0), ST (1));
1063	break;	1225	break;
1064		1226
1065	case 2:	1227	case 2:
1066	prepare_schedule (&ta);	1228	prepare_schedule (&ta);
1067	break;	1229	break;
…		…
1069	case 3:	1231	case 3:
1070	prepare_cede (&ta);	1232	prepare_cede (&ta);
1071	break;	1233	break;
1072		1234
1073	case 4:	1235	case 4:
1074	{	1236	if (!prepare_cede_notself (&ta))
1075	SV *yieldstack;	1237	XSRETURN_EMPTY;
1076	SV *sv;
1077	AV *defav = GvAV (PL_defgv);
1078		1238
1079	yieldstack = *hv_fetch (
1080	(HV *)SvRV (GvSV (coro_current)),
1081	"yieldstack", sizeof ("yieldstack") - 1,
1082	0
1083	);
1084
1085	/* set up @_ -- ugly */
1086	av_clear (defav);
1087	av_fill (defav, items - 1);
1088	while (items--)
1089	av_store (defav, items, SvREFCNT_inc (ST(items)));
1090
1091	sv = av_pop ((AV *)SvRV (yieldstack));
1092	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1093	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1094	ta.flags = 0;
1095	SvREFCNT_dec (sv);
1096	}
1097	break;	1239	break;
1098
1099	}	1240	}
1100		1241
		1242	BARRIER;
1101	TRANSFER (ta);	1243	TRANSFER (ta);
1102	}
1103		1244
1104	void	1245	if (GIMME_V != G_VOID && ta.next != ta.prev)
1105	_clone_state_from (SV *dst, SV *src)	1246	XSRETURN_YES;
		1247	}
		1248
		1249	bool
		1250	_destroy (SV *coro_sv)
1106	CODE:	1251	CODE:
1107	{	1252	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
1108	struct coro *coro_src = SvSTATE (src);	1253	OUTPUT:
1109		1254	RETVAL
1110	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1111
1112	++coro_src->refcnt;
1113	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1114	}
1115
1116	void
1117	_nonlocal_goto (IV nextop)
1118	CODE:
1119	/* uuh, somebody will kill me again for this */
1120	PL_op->op_next = INT2PTR (OP *, nextop);
1121		1255
1122	void	1256	void
1123	_exit (code)	1257	_exit (code)
1124	int code	1258	int code
1125	PROTOTYPE: $	1259	PROTOTYPE: $
1126	CODE:	1260	CODE:
1127	_exit (code);	1261	_exit (code);
1128		1262
		1263	int
		1264	cctx_count ()
		1265	CODE:
		1266	RETVAL = cctx_count;
		1267	OUTPUT:
		1268	RETVAL
		1269
		1270	int
		1271	cctx_idle ()
		1272	CODE:
		1273	RETVAL = cctx_idle;
		1274	OUTPUT:
		1275	RETVAL
		1276
1129	MODULE = Coro::State PACKAGE = Coro	1277	MODULE = Coro::State PACKAGE = Coro
1130		1278
1131	BOOT:	1279	BOOT:
1132	{	1280	{
1133	int i;	1281	int i;
…		…
1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1287	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1288	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1289	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1290	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143		1291
1144	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1292	coro_current = get_sv ("Coro::current", FALSE);
1145	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1293	SvREADONLY_on (coro_current);
1146		1294
1147	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1295	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148	coro_ready[i] = newAV ();	1296	coro_ready[i] = newAV ();
1149		1297
1150	{	1298	{
1151	SV *sv = perl_get_sv("Coro::API", 1);	1299	SV *sv = perl_get_sv("Coro::API", 1);
1152		1300
1153	coroapi.schedule = api_schedule;	1301	coroapi.schedule = api_schedule;
		1302	coroapi.save = api_save;
1154	coroapi.cede = api_cede;	1303	coroapi.cede = api_cede;
		1304	coroapi.cede_notself = api_cede_notself;
1155	coroapi.ready = api_ready;	1305	coroapi.ready = api_ready;
		1306	coroapi.is_ready = api_is_ready;
1156	coroapi.nready = &coro_nready;	1307	coroapi.nready = &coro_nready;
1157	coroapi.current = coro_current;	1308	coroapi.current = coro_current;
1158		1309
1159	GCoroAPI = &coroapi;	1310	GCoroAPI = &coroapi;
1160	sv_setiv (sv, (IV)&coroapi);	1311	sv_setiv (sv, (IV)&coroapi);
1161	SvREADONLY_on (sv);	1312	SvREADONLY_on (sv);
1162	}	1313	}
1163	}	1314	}
		1315
		1316	void
		1317	_set_current (SV *current)
		1318	PROTOTYPE: $
		1319	CODE:
		1320	SvREFCNT_dec (SvRV (coro_current));
		1321	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1164		1322
1165	int	1323	int
1166	prio (Coro::State coro, int newprio = 0)	1324	prio (Coro::State coro, int newprio = 0)
1167	ALIAS:	1325	ALIAS:
1168	nice = 1	1326	nice = 1
…		…
1171	RETVAL = coro->prio;	1329	RETVAL = coro->prio;
1172		1330
1173	if (items > 1)	1331	if (items > 1)
1174	{	1332	{
1175	if (ix)	1333	if (ix)
1176	newprio += coro->prio;	1334	newprio = coro->prio - newprio;
1177		1335
1178	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1336	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1179	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1337	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1180		1338
1181	coro->prio = newprio;	1339	coro->prio = newprio;
1182	}	1340	}
1183	}	1341	}
		1342	OUTPUT:
		1343	RETVAL
1184		1344
1185	void	1345	SV *
1186	ready (SV *self)	1346	ready (SV *self)
1187	PROTOTYPE: $	1347	PROTOTYPE: $
1188	CODE:	1348	CODE:
1189	api_ready (self);	1349	RETVAL = boolSV (api_ready (self));
		1350	OUTPUT:
		1351	RETVAL
		1352
		1353	SV *
		1354	is_ready (SV *self)
		1355	PROTOTYPE: $
		1356	CODE:
		1357	RETVAL = boolSV (api_is_ready (self));
		1358	OUTPUT:
		1359	RETVAL
1190		1360
1191	int	1361	int
1192	nready (...)	1362	nready (...)
1193	PROTOTYPE:	1363	PROTOTYPE:
1194	CODE:	1364	CODE:
…		…
1200		1370
1201	SV *	1371	SV *
1202	_get_state ()	1372	_get_state ()
1203	CODE:	1373	CODE:
1204	{	1374	{
1205	struct {	1375	struct io_state *data;
1206	int errorno;
1207	int laststype;
1208	int laststatval;
1209	Stat_t statcache;
1210	} data;
1211		1376
		1377	RETVAL = newSV (sizeof (struct io_state));
		1378	data = (struct io_state *)SvPVX (RETVAL);
		1379	SvCUR_set (RETVAL, sizeof (struct io_state));
		1380	SvPOK_only (RETVAL);
		1381
1212	data.errorno = errno;	1382	data->errorno = errno;
1213	data.laststype = PL_laststype;	1383	data->laststype = PL_laststype;
1214	data.laststatval = PL_laststatval;	1384	data->laststatval = PL_laststatval;
1215	data.statcache = PL_statcache;	1385	data->statcache = PL_statcache;
1216
1217	RETVAL = newSVpvn ((char *)&data, sizeof data);
1218	}	1386	}
1219	OUTPUT:	1387	OUTPUT:
1220	RETVAL	1388	RETVAL
1221		1389
1222	void	1390	void
1223	_set_state (char *data_)	1391	_set_state (char *data_)
1224	PROTOTYPE: $	1392	PROTOTYPE: $
1225	CODE:	1393	CODE:
1226	{	1394	{
1227	struct {	1395	struct io_state *data = (void *)data_;
1228	int errorno;
1229	int laststype;
1230	int laststatval;
1231	Stat_t statcache;
1232	} *data = (void *)data_;
1233		1396
1234	errno = data->errorno;	1397	errno = data->errorno;
1235	PL_laststype = data->laststype;	1398	PL_laststype = data->laststype;
1236	PL_laststatval = data->laststatval;	1399	PL_laststatval = data->laststatval;
1237	PL_statcache = data->statcache;	1400	PL_statcache = data->statcache;
1238	}	1401	}
		1402

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