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Comparing Coro/Coro/State.xs (file contents):
Revision 1.92 by root, Sun Nov 26 02:16:19 2006 UTC vs.
Revision 1.148 by root, Fri Apr 13 12:56:55 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <stdio.h>	75	/* 5.8.7 */
33	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
34		79
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	81	# 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	82	#endif
53	# include <limits.h>	83
54	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
55	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif	86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
61	#endif	91	#endif
62		92
63	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* 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	94	* to the current C stack pointer. Its property is that it changes with each call
65	* and should be unique. */	95	* and should be unique. */
66	#define dSTACKLEVEL int stacklevel	96	#define dSTACKLEVEL int stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	97	#define STACKLEVEL ((void *)&stacklevel)
68		98
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		100
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	101	#if __GNUC__ >= 3
		102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		104	#else
		105	# define attribute(x)
		106	# define BARRIER
		107	#endif
		108
		109	#define NOINLINE attribute ((noinline))
72		110
73	#include "CoroAPI.h"	111	#include "CoroAPI.h"
74
75	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
76		112
77	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
78	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
79	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
80	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
81	#else	117	#else
82	# define LOCK (void)0	118	# define LOCK (void)0
83	# define UNLOCK (void)0	119	# define UNLOCK (void)0
84	#endif	120	#endif
85		121
		122	/* helper storage struct for Coro::AIO */
		123	struct io_state
		124	{
		125	int errorno;
		126	I32 laststype;
		127	int laststatval;
		128	Stat_t statcache;
		129	};
		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
86	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
87	static AV *main_mainstack; /* used to differentiate between $main and others */	133	static AV *main_mainstack; /* used to differentiate between $main and others */
		134	static JMPENV *main_top_env;
88	static HV *coro_state_stash, *coro_stash;	135	static HV *coro_state_stash, *coro_stash;
89	static SV *coro_mortal; /* will be freed after next transfer */	136	static SV *coro_mortal; /* will be freed after next transfer */
90		137
		138	static struct coro_cctx *cctx_first;
		139	static int cctx_count, cctx_idle;
		140
91	/* this is a structure representing a c-level coroutine */	141	/* this is a structure representing a c-level coroutine */
92	typedef struct coro_stack {	142	typedef struct coro_cctx {
93	struct coro_stack *next;	143	struct coro_cctx *next;
94		144
95	void *idle_sp; /* original stacklevel when coroutine was created */	145	/* the stack */
96	void *sptr;	146	void *sptr;
97	long ssize; /* positive == mmap, otherwise malloc */	147	size_t ssize;
98		148
99	/* cpu state */	149	/* cpu state */
		150	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		151	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		152	JMPENV *top_env;
100	coro_context cctx;	153	coro_context cctx;
101	JMPENV *top_env;
102	} coro_stack;
103		154
104	/* the (fake) coro_stack representing the main program */	155	#if CORO_USE_VALGRIND
105	static coro_stack *main_stack;	156	int valgrind_id;
		157	#endif
		158	char inuse, mapped;
		159	} coro_cctx;
		160
		161	enum {
		162	CF_RUNNING = 0x0001, /* coroutine is running */
		163	CF_READY = 0x0002, /* coroutine is ready */
		164	CF_NEW = 0x0004, /* has never been switched to */
		165	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		166	};
106		167
107	/* this is a structure representing a perl-level coroutine */	168	/* this is a structure representing a perl-level coroutine */
108	struct coro {	169	struct coro {
109	/* the c coroutine allocated to this perl coroutine, if any */	170	/* the c coroutine allocated to this perl coroutine, if any */
110	coro_stack *stack;	171	coro_cctx *cctx;
111		172
112	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
113	AV *args;	174	AV *args;
114	int refcnt;	175	int refcnt;
		176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
115		178
116	/* optionally saved, might be zero */	179	/* optionally saved, might be zero */
117	AV *defav;	180	AV *defav; /* @_ */
118	SV *defsv;	181	SV *defsv; /* $_ */
119	SV *errsv;	182	SV *errsv; /* $@ */
		183	GV *deffh; /* default filehandle */
		184	SV *irssv; /* $/ */
		185	SV *irssv_sv; /* real $/ cache */
120		186
121	/* saved global state not related to stacks */	187	#define VAR(name,type) type name;
122	U8 dowarn;	188	# include "state.h"
123	I32 in_eval;	189	#undef VAR
124
125	/* the stacks and related info (callchain etc..) */
126	PERL_SI *curstackinfo;
127	AV *curstack;
128	AV *mainstack;
129	SV **stack_sp;
130	OP *op;
131	SV **curpad;
132	AV *comppad;
133	CV *compcv;
134	SV **stack_base;
135	SV **stack_max;
136	SV **tmps_stack;
137	I32 tmps_floor;
138	I32 tmps_ix;
139	I32 tmps_max;
140	I32 *markstack;
141	I32 *markstack_ptr;
142	I32 *markstack_max;
143	I32 *scopestack;
144	I32 scopestack_ix;
145	I32 scopestack_max;
146	ANY *savestack;
147	I32 savestack_ix;
148	I32 savestack_max;
149	OP **retstack;
150	I32 retstack_ix;
151	I32 retstack_max;
152	PMOP *curpm;
153	COP *curcop;
154		190
155	/* coro process data */	191	/* coro process data */
156	int prio;	192	int prio;
157	};	193	};
158		194
159	typedef struct coro *Coro__State;	195	typedef struct coro *Coro__State;
160	typedef struct coro *Coro__State_or_hashref;	196	typedef struct coro *Coro__State_or_hashref;
161		197
		198	/** Coro ********************************************************************/
		199
		200	#define PRIO_MAX 3
		201	#define PRIO_HIGH 1
		202	#define PRIO_NORMAL 0
		203	#define PRIO_LOW -1
		204	#define PRIO_IDLE -3
		205	#define PRIO_MIN -4
		206
		207	/* for Coro.pm */
		208	static SV *coro_current;
		209	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		210	static int coro_nready;
		211
		212	/** lowlevel stuff **********************************************************/
		213
162	static AV *	214	static AV *
163	coro_clone_padlist (pTHX_ CV *cv)	215	coro_clone_padlist (pTHX_ CV *cv)
164	{	216	{
165	AV *padlist = CvPADLIST (cv);	217	AV *padlist = CvPADLIST (cv);
166	AV *newpadlist, *newpad;	218	AV *newpadlist, *newpad;
167		219
168	newpadlist = newAV ();	220	newpadlist = newAV ();
169	AvREAL_off (newpadlist);	221	AvREAL_off (newpadlist);
170	#if PERL_VERSION < 9	222	#if PERL_VERSION_ATLEAST (5,9,0)
		223	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		224	#else
171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	225	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
172	#else
173	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
174	#endif	226	#endif
175	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	227	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
176	--AvFILLp (padlist);	228	--AvFILLp (padlist);
177		229
178	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	230	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
222		274
223	#define PERL_MAGIC_coro PERL_MAGIC_ext	275	#define PERL_MAGIC_coro PERL_MAGIC_ext
224		276
225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	277	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
226		278
		279	#define CORO_MAGIC(cv) \
		280	SvMAGIC (cv) \
		281	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		282	? SvMAGIC (cv) \
		283	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		284	: 0
		285
227	/* the next two functions merely cache the padlists */	286	/* the next two functions merely cache the padlists */
228	static void	287	static void
229	get_padlist (pTHX_ CV *cv)	288	get_padlist (pTHX_ CV *cv)
230	{	289	{
231	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	290	MAGIC *mg = CORO_MAGIC (cv);
		291	AV *av;
232		292
233	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	293	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
234	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	294	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
235	else	295	else
236	{	296	{
237	#if 0	297	#if CORO_PREFER_PERL_FUNCTIONS
238	/* this should work - but it doesn't :( */	298	/* this is probably cleaner, but also slower? */
239	CV *cp = Perl_cv_clone (aTHX_ cv);	299	CV *cp = Perl_cv_clone (cv);
240	CvPADLIST (cv) = CvPADLIST (cp);	300	CvPADLIST (cv) = CvPADLIST (cp);
241	CvPADLIST (cp) = 0;	301	CvPADLIST (cp) = 0;
242	SvREFCNT_dec (cp);	302	SvREFCNT_dec (cp);
243	#else	303	#else
244	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	304	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
247	}	307	}
248		308
249	static void	309	static void
250	put_padlist (pTHX_ CV *cv)	310	put_padlist (pTHX_ CV *cv)
251	{	311	{
252	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	312	MAGIC *mg = CORO_MAGIC (cv);
		313	AV *av;
253		314
254	if (!mg)	315	if (!mg)
255	{	316	{
256	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	317	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
257	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	318	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
258	mg->mg_virtual = &vtbl_coro;	319	mg->mg_virtual = &vtbl_coro;
259	mg->mg_obj = (SV *)newAV ();	320	mg->mg_obj = (SV *)newAV ();
260	}	321	}
261		322
262	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	323	av = (AV *)mg->mg_obj;
		324
		325	if (AvFILLp (av) >= AvMAX (av))
		326	av_extend (av, AvMAX (av) + 1);
		327
		328	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
263	}	329	}
		330
		331	/** load & save, init *******************************************************/
264		332
265	#define SB do {	333	#define SB do {
266	#define SE } while (0)	334	#define SE } while (0)
267		335
268	#define LOAD(state) load_state(aTHX_ (state));
269	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
270
271	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	336	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
272		337
273	static void	338	static void
274	load_state(pTHX_ Coro__State c)	339	load_perl (pTHX_ Coro__State c)
275	{	340	{
276	PL_dowarn = c->dowarn;	341	#define VAR(name,type) PL_ ## name = c->name;
277	PL_in_eval = c->in_eval;	342	# include "state.h"
278		343	#undef VAR
279	PL_curstackinfo = c->curstackinfo;
280	PL_curstack = c->curstack;
281	PL_mainstack = c->mainstack;
282	PL_stack_sp = c->stack_sp;
283	PL_op = c->op;
284	PL_curpad = c->curpad;
285	PL_comppad = c->comppad;
286	PL_compcv = c->compcv;
287	PL_stack_base = c->stack_base;
288	PL_stack_max = c->stack_max;
289	PL_tmps_stack = c->tmps_stack;
290	PL_tmps_floor = c->tmps_floor;
291	PL_tmps_ix = c->tmps_ix;
292	PL_tmps_max = c->tmps_max;
293	PL_markstack = c->markstack;
294	PL_markstack_ptr = c->markstack_ptr;
295	PL_markstack_max = c->markstack_max;
296	PL_scopestack = c->scopestack;
297	PL_scopestack_ix = c->scopestack_ix;
298	PL_scopestack_max = c->scopestack_max;
299	PL_savestack = c->savestack;
300	PL_savestack_ix = c->savestack_ix;
301	PL_savestack_max = c->savestack_max;
302	#if PERL_VERSION < 9
303	PL_retstack = c->retstack;
304	PL_retstack_ix = c->retstack_ix;
305	PL_retstack_max = c->retstack_max;
306	#endif
307	PL_curpm = c->curpm;
308	PL_curcop = c->curcop;
309		344
310	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	345	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
311	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	346	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
312	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	347	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		348	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		349
		350	if (c->irssv)
		351	{
		352	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		353	{
		354	SvREFCNT_dec (c->irssv);
		355	c->irssv = 0;
		356	}
		357	else
		358	{
		359	REPLACE_SV (PL_rs, c->irssv);
		360	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		361	sv_setsv (c->irssv_sv, PL_rs);
		362	}
		363	}
313		364
314	{	365	{
315	dSP;	366	dSP;
316	CV *cv;	367	CV *cv;
317		368
318	/* now do the ugly restore mess */	369	/* now do the ugly restore mess */
319	while ((cv = (CV *)POPs))	370	while ((cv = (CV *)POPs))
320	{	371	{
321	AV *padlist = (AV *)POPs;
322
323	if (padlist)
324	{
325	put_padlist (aTHX_ cv); /* mark this padlist as available */	372	put_padlist (aTHX_ cv); /* mark this padlist as available */
326	CvPADLIST(cv) = padlist;	373	CvDEPTH (cv) = PTR2IV (POPs);
327	}	374	CvPADLIST (cv) = (AV *)POPs;
328
329	++CvDEPTH(cv);
330	}	375	}
331		376
332	PUTBACK;	377	PUTBACK;
333	}	378	}
		379	assert (!PL_comppad || AvARRAY (PL_comppad));//D
334	}	380	}
335		381
336	static void	382	static void
337	save_state(pTHX_ Coro__State c, int flags)	383	save_perl (pTHX_ Coro__State c)
338	{	384	{
		385	assert (!PL_comppad || AvARRAY (PL_comppad));//D
339	{	386	{
340	dSP;	387	dSP;
341	I32 cxix = cxstack_ix;	388	I32 cxix = cxstack_ix;
342	PERL_CONTEXT *ccstk = cxstack;	389	PERL_CONTEXT *ccstk = cxstack;
343	PERL_SI *top_si = PL_curstackinfo;	390	PERL_SI *top_si = PL_curstackinfo;
…		…
345	/*	392	/*
346	* the worst thing you can imagine happens first - we have to save	393	* the worst thing you can imagine happens first - we have to save
347	* (and reinitialize) all cv's in the whole callchain :(	394	* (and reinitialize) all cv's in the whole callchain :(
348	*/	395	*/
349		396
		397	EXTEND (SP, 3 + 1);
350	PUSHs (Nullsv);	398	PUSHs (Nullsv);
351	/* this loop was inspired by pp_caller */	399	/* this loop was inspired by pp_caller */
352	for (;;)	400	for (;;)
353	{	401	{
354	while (cxix >= 0)	402	while (cxix >= 0)
355	{	403	{
356	PERL_CONTEXT *cx = &ccstk[cxix--];	404	PERL_CONTEXT *cx = &ccstk[cxix--];
357		405
358	if (CxTYPE(cx) == CXt_SUB)	406	if (CxTYPE (cx) == CXt_SUB)
359	{	407	{
360	CV *cv = cx->blk_sub.cv;	408	CV *cv = cx->blk_sub.cv;
		409
361	if (CvDEPTH(cv))	410	if (CvDEPTH (cv))
362	{	411	{
363	EXTEND (SP, CvDEPTH(cv)*2);	412	EXTEND (SP, 3);
364
365	while (--CvDEPTH(cv))
366	{
367	/* this tells the restore code to increment CvDEPTH */
368	PUSHs (Nullsv);
369	PUSHs ((SV *)cv);
370	}
371
372	PUSHs ((SV *)CvPADLIST(cv));	413	PUSHs ((SV *)CvPADLIST (cv));
		414	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
373	PUSHs ((SV *)cv);	415	PUSHs ((SV *)cv);
374		416
		417	CvDEPTH (cv) = 0;
375	get_padlist (aTHX_ cv);	418	get_padlist (aTHX_ cv);
376	}	419	}
377	}	420	}
378	#ifdef CXt_FORMAT
379	else if (CxTYPE(cx) == CXt_FORMAT)
380	{
381	/* I never used formats, so how should I know how these are implemented? */
382	/* my bold guess is as a simple, plain sub... */
383	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
384	}
385	#endif
386	}	421	}
387		422
388	if (top_si->si_type == PERLSI_MAIN)	423	if (top_si->si_type == PERLSI_MAIN)
389	break;	424	break;
390		425
…		…
394	}	429	}
395		430
396	PUTBACK;	431	PUTBACK;
397	}	432	}
398		433
399	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	434	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
400	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	435	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
401	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	436	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		437	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		438	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
402		439
403	c->dowarn = PL_dowarn;	440	#define VAR(name,type)c->name = PL_ ## name;
404	c->in_eval = PL_in_eval;	441	# include "state.h"
405		442	#undef VAR
406	c->curstackinfo = PL_curstackinfo;
407	c->curstack = PL_curstack;
408	c->mainstack = PL_mainstack;
409	c->stack_sp = PL_stack_sp;
410	c->op = PL_op;
411	c->curpad = PL_curpad;
412	c->comppad = PL_comppad;
413	c->compcv = PL_compcv;
414	c->stack_base = PL_stack_base;
415	c->stack_max = PL_stack_max;
416	c->tmps_stack = PL_tmps_stack;
417	c->tmps_floor = PL_tmps_floor;
418	c->tmps_ix = PL_tmps_ix;
419	c->tmps_max = PL_tmps_max;
420	c->markstack = PL_markstack;
421	c->markstack_ptr = PL_markstack_ptr;
422	c->markstack_max = PL_markstack_max;
423	c->scopestack = PL_scopestack;
424	c->scopestack_ix = PL_scopestack_ix;
425	c->scopestack_max = PL_scopestack_max;
426	c->savestack = PL_savestack;
427	c->savestack_ix = PL_savestack_ix;
428	c->savestack_max = PL_savestack_max;
429	#if PERL_VERSION < 9
430	c->retstack = PL_retstack;
431	c->retstack_ix = PL_retstack_ix;
432	c->retstack_max = PL_retstack_max;
433	#endif
434	c->curpm = PL_curpm;
435	c->curcop = PL_curcop;
436	}	443	}
437		444
438	/*	445	/*
439	* allocate various perl stacks. This is an exact copy	446	* allocate various perl stacks. This is an exact copy
440	* of perl.c:init_stacks, except that it uses less memory	447	* of perl.c:init_stacks, except that it uses less memory
441	* on the (sometimes correct) assumption that coroutines do	448	* on the (sometimes correct) assumption that coroutines do
442	* not usually need a lot of stackspace.	449	* not usually need a lot of stackspace.
443	*/	450	*/
		451	#if CORO_PREFER_PERL_FUNCTIONS
		452	# define coro_init_stacks init_stacks
		453	#else
444	static void	454	static void
445	coro_init_stacks (pTHX)	455	coro_init_stacks (pTHX)
446	{	456	{
447	LOCK;
448
449	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	457	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
450	PL_curstackinfo->si_type = PERLSI_MAIN;	458	PL_curstackinfo->si_type = PERLSI_MAIN;
451	PL_curstack = PL_curstackinfo->si_stack;	459	PL_curstack = PL_curstackinfo->si_stack;
452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	460	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453		461
454	PL_stack_base = AvARRAY(PL_curstack);	462	PL_stack_base = AvARRAY(PL_curstack);
455	PL_stack_sp = PL_stack_base;	463	PL_stack_sp = PL_stack_base;
456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	464	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457		465
458	New(50,PL_tmps_stack,96,SV*);	466	New(50,PL_tmps_stack,128,SV*);
459	PL_tmps_floor = -1;	467	PL_tmps_floor = -1;
460	PL_tmps_ix = -1;	468	PL_tmps_ix = -1;
461	PL_tmps_max = 96;	469	PL_tmps_max = 128;
462		470
463	New(54,PL_markstack,16,I32);	471	New(54,PL_markstack,32,I32);
464	PL_markstack_ptr = PL_markstack;	472	PL_markstack_ptr = PL_markstack;
465	PL_markstack_max = PL_markstack + 16;	473	PL_markstack_max = PL_markstack + 32;
466		474
467	#ifdef SET_MARK_OFFSET	475	#ifdef SET_MARK_OFFSET
468	SET_MARK_OFFSET;	476	SET_MARK_OFFSET;
469	#endif	477	#endif
470		478
471	New(54,PL_scopestack,16,I32);	479	New(54,PL_scopestack,32,I32);
472	PL_scopestack_ix = 0;	480	PL_scopestack_ix = 0;
473	PL_scopestack_max = 16;	481	PL_scopestack_max = 32;
474		482
475	New(54,PL_savestack,96,ANY);	483	New(54,PL_savestack,64,ANY);
476	PL_savestack_ix = 0;	484	PL_savestack_ix = 0;
477	PL_savestack_max = 96;	485	PL_savestack_max = 64;
478		486
479	#if PERL_VERSION < 9	487	#if !PERL_VERSION_ATLEAST (5,9,0)
480	New(54,PL_retstack,8,OP*);	488	New(54,PL_retstack,16,OP*);
481	PL_retstack_ix = 0;	489	PL_retstack_ix = 0;
482	PL_retstack_max = 8;	490	PL_retstack_max = 16;
483	#endif	491	#endif
484
485	UNLOCK;
486	}	492	}
		493	#endif
487		494
488	/*	495	/*
489	* destroy the stacks, the callchain etc...	496	* destroy the stacks, the callchain etc...
490	*/	497	*/
491	static void	498	static void
492	destroy_stacks(pTHX)	499	coro_destroy_stacks (pTHX)
493	{	500	{
494	if (!IN_DESTRUCT)	501	if (!IN_DESTRUCT)
495	{	502	{
496	/* is this ugly, I ask? */	503	/* restore all saved variables and stuff */
497	LEAVE_SCOPE (0);	504	LEAVE_SCOPE (0);
		505	assert (PL_tmps_floor == -1);
498		506
499	/* sure it is, but more important: is it correct?? :/ */	507	/* free all temporaries */
500	FREETMPS;	508	FREETMPS;
		509	assert (PL_tmps_ix == -1);
501		510
		511	/* unwind all extra stacks */
502	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	512	POPSTACK_TO (PL_mainstack);
		513
		514	/* unwind main stack */
		515	dounwind (-1);
503	}	516	}
504		517
505	while (PL_curstackinfo->si_next)	518	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	519	PL_curstackinfo = PL_curstackinfo->si_next;
507		520
508	while (PL_curstackinfo)	521	while (PL_curstackinfo)
509	{	522	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	523	PERL_SI *p = PL_curstackinfo->si_prev;
511		524
512	{ /*D*//*remove*/
513	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */
516	}
517
518	if (!IN_DESTRUCT)	525	if (!IN_DESTRUCT)
519	{
520	dounwind (-1);/*D*//*remove*/
521	SvREFCNT_dec (PL_curstackinfo->si_stack);	526	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}
523		527
524	Safefree (PL_curstackinfo->si_cxstack);	528	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree (PL_curstackinfo);	529	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	530	PL_curstackinfo = p;
527	}	531	}
528		532
529	Safefree (PL_tmps_stack);	533	Safefree (PL_tmps_stack);
530	Safefree (PL_markstack);	534	Safefree (PL_markstack);
531	Safefree (PL_scopestack);	535	Safefree (PL_scopestack);
532	Safefree (PL_savestack);	536	Safefree (PL_savestack);
533	#if PERL_VERSION < 9	537	#if !PERL_VERSION_ATLEAST (5,9,0)
534	Safefree (PL_retstack);	538	Safefree (PL_retstack);
535	#endif	539	#endif
536	}	540	}
537		541
		542	/** coroutine stack handling ************************************************/
		543
538	static void	544	static void
539	setup_coro (struct coro *coro)	545	setup_coro (pTHX_ struct coro *coro)
540	{	546	{
541	/*	547	/*
542	* emulate part of the perl startup here.	548	* emulate part of the perl startup here.
543	*/	549	*/
544	dTHX;	550	coro_init_stacks (aTHX);
		551
		552	PL_curcop = &PL_compiling;
		553	PL_in_eval = EVAL_NULL;
		554	PL_comppad = 0;
		555	PL_curpm = 0;
		556	PL_localizing = 0;
		557	PL_dirty = 0;
		558	PL_restartop = 0;
		559
		560	{
		561	dSP;
		562	LOGOP myop;
		563
		564	SvREFCNT_dec (GvAV (PL_defgv));
		565	GvAV (PL_defgv) = coro->args; coro->args = 0;
		566
		567	Zero (&myop, 1, LOGOP);
		568	myop.op_next = Nullop;
		569	myop.op_flags = OPf_WANT_VOID;
		570
		571	PUSHMARK (SP);
		572	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		573	PUTBACK;
		574	PL_op = (OP *)&myop;
		575	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		576	SPAGAIN;
		577	}
		578
		579	ENTER; /* necessary e.g. for dounwind */
		580	}
		581
		582	static void
		583	free_coro_mortal (pTHX)
		584	{
		585	if (coro_mortal)
		586	{
		587	SvREFCNT_dec (coro_mortal);
		588	coro_mortal = 0;
		589	}
		590	}
		591
		592	/* inject a fake call to Coro::State::_cctx_init into the execution */
		593	/* _cctx_init shoukld be careful, as it could be called at almost any time */
		594	/* during execution of a pelr program */
		595	static void NOINLINE
		596	prepare_cctx (pTHX_ coro_cctx *cctx)
		597	{
545	dSP;	598	dSP;
546	UNOP myop;	599	LOGOP myop;
547	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
548		600
549	coro_init_stacks (aTHX);
550	/*PL_curcop = 0;*/
551	/*PL_in_eval = PL_in_eval;*/ /* inherit */
552	SvREFCNT_dec (GvAV (PL_defgv));
553	GvAV (PL_defgv) = coro->args; coro->args = 0;
554
555	SPAGAIN;
556
557	Zero (&myop, 1, UNOP);	601	Zero (&myop, 1, LOGOP);
558	myop.op_next = Nullop;	602	myop.op_next = PL_op;
559	myop.op_flags = OPf_WANT_VOID;	603	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
560		604
		605	PUSHMARK (SP);
		606	EXTEND (SP, 2);
		607	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		608	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		609	PUTBACK;
561	PL_op = (OP *)&myop;	610	PL_op = (OP *)&myop;
562
563	PUSHMARK(SP);
564	XPUSHs (sub_init);
565	PUTBACK;
566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	611	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
567	SPAGAIN;	612	SPAGAIN;
568
569	ENTER; /* necessary e.g. for dounwind */
570	}	613	}
571		614
572	static void	615	/*
573	free_coro_mortal ()	616	* this is a _very_ stripped down perl interpreter ;)
574	{	617	*/
575	if (coro_mortal)
576	{
577	SvREFCNT_dec (coro_mortal);
578	coro_mortal = 0;
579	}
580	}
581
582	static void	618	static void
583	coro_run (void *arg)	619	coro_run (void *arg)
584	{	620	{
585	/*
586	* this is a _very_ stripped down perl interpreter ;)
587	*/
588	dTHX;	621	dTHX;
		622
		623	/* coro_run is the alternative tail of transfer(), so unlock here. */
		624	UNLOCK;
		625
589	PL_top_env = &PL_start_env;	626	PL_top_env = &PL_start_env;
590		627
591	UNLOCK;	628	/* inject a fake subroutine call to cctx_init */
		629	prepare_cctx (aTHX_ (coro_cctx *)arg);
592		630
593	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
594	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
595	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
596
597	/* somebody will hit me for both perl_run and PL_restart_op */	631	/* somebody or something will hit me for both perl_run and PL_restartop */
598	perl_run (aTHX_ PERL_GET_CONTEXT);	632	PL_restartop = PL_op;
		633	perl_run (PL_curinterp);
599		634
600	abort ();	635	/* If perl-run returns we assume exit() was being called, which */
		636	/* seems to be the only valid (non-bug) reason for perl_run to return. */
		637	/* We try to exit by jumping to the bootstrap-time "top" top_env, as */
		638	/* we cannot restore the "main" coroutine as Coro has no such concept */
		639	PL_top_env = main_top_env;
		640	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
601	}	641	}
602		642
603	static coro_stack *	643	static coro_cctx *
604	stack_new ()	644	cctx_new ()
605	{	645	{
606	coro_stack *stack;	646	coro_cctx *cctx;
		647	void *stack_start;
		648	size_t stack_size;
607		649
		650	++cctx_count;
		651
608	New (0, stack, 1, coro_stack);	652	Newz (0, cctx, 1, coro_cctx);
609		653
610	#if HAVE_MMAP	654	#if HAVE_MMAP
611		655
612	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	656	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		657	/* mmap supposedly does allocate-on-write for us */
613	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	658	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
614		659
615	if (stack->sptr == (void *)-1)	660	if (cctx->sptr != (void *)-1)
		661	{
		662	# if CORO_STACKGUARD
		663	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		664	# endif
		665	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		666	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		667	cctx->mapped = 1;
616	{	668	}
		669	else
		670	#endif
		671	{
		672	cctx->ssize = coro_stacksize * (long)sizeof (long);
		673	New (0, cctx->sptr, coro_stacksize, long);
		674
		675	if (!cctx->sptr)
		676	{
617	perror ("FATAL: unable to mmap stack for coroutine");	677	perror ("FATAL: unable to allocate stack for coroutine");
618	_exit (EXIT_FAILURE);	678	_exit (EXIT_FAILURE);
619	}	679	}
620		680
621	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	681	stack_start = cctx->sptr;
622		682	stack_size = cctx->ssize;
623	#else
624
625	stack->ssize = STACKSIZE * (long)sizeof (long);
626	New (0, stack->sptr, STACKSIZE, long);
627
628	if (!stack->sptr)
629	{	683	}
630	perror (stderr, "FATAL: unable to malloc stack for coroutine");
631	_exit (EXIT_FAILURE);
632	}
633		684
634	#endif	685	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
635
636	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	686	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
637		687
638	return stack;	688	return cctx;
639	}	689	}
640		690
641	static void	691	static void
642	stack_free (coro_stack *stack)	692	cctx_destroy (coro_cctx *cctx)
643	{	693	{
644	if (!stack || stack == main_stack)	694	if (!cctx)
645	return;	695	return;
646		696
		697	--cctx_count;
		698
		699	#if CORO_USE_VALGRIND
		700	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		701	#endif
		702
647	#if HAVE_MMAP	703	#if HAVE_MMAP
		704	if (cctx->mapped)
648	munmap (stack->sptr, stack->ssize);	705	munmap (cctx->sptr, cctx->ssize);
649	#else
650	Safefree (stack->sptr);
651	#endif
652
653	Safefree (stack);
654	}
655
656	static coro_stack *stack_first;
657
658	static coro_stack *
659	stack_get ()
660	{
661	coro_stack *stack;
662
663	if (stack_first)
664	{
665	stack = stack_first;
666	stack_first = stack->next;
667	}
668	else	706	else
		707	#endif
		708	Safefree (cctx->sptr);
		709
		710	Safefree (cctx);
		711	}
		712
		713	static coro_cctx *
		714	cctx_get (pTHX)
		715	{
		716	while (cctx_first)
669	{	717	{
670	stack = stack_new ();	718	coro_cctx *cctx = cctx_first;
		719	cctx_first = cctx->next;
		720	--cctx_idle;
		721
		722	if (cctx->ssize >= coro_stacksize)
		723	return cctx;
		724
		725	cctx_destroy (cctx);
		726	}
		727
671	PL_op = PL_op->op_next;	728	PL_op = PL_op->op_next;
		729	return cctx_new ();
		730	}
		731
		732	static void
		733	cctx_put (coro_cctx *cctx)
		734	{
		735	/* free another cctx if overlimit */
		736	if (cctx_idle >= MAX_IDLE_CCTX)
		737	{
		738	coro_cctx *first = cctx_first;
		739	cctx_first = first->next;
		740	--cctx_idle;
		741
		742	assert (!first->inuse);
		743	cctx_destroy (first);
672	}	744	}
673		745
674	return stack;	746	++cctx_idle;
		747	cctx->next = cctx_first;
		748	cctx_first = cctx;
675	}	749	}
676		750
677	static void	751	/** coroutine switching *****************************************************/
678	stack_put (coro_stack *stack)
679	{
680	stack->next = stack_first;
681	stack_first = stack;
682	}
683		752
684	/* never call directly, always through the coro_state_transfer global variable */	753	/* never call directly, always through the coro_state_transfer global variable */
685	static void	754	static void NOINLINE
686	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	755	transfer (pTHX_ struct coro *prev, struct coro *next)
687	{	756	{
688	dSTACKLEVEL;	757	dSTACKLEVEL;
689		758
690	/* sometimes transfer is only called to set idle_sp */	759	/* sometimes transfer is only called to set idle_sp */
691	if (flags == TRANSFER_SET_STACKLEVEL)	760	if (!next)
		761	{
692	((coro_stack *)prev)->idle_sp = STACKLEVEL;	762	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		763	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		764	}
693	else if (prev != next)	765	else if (prev != next)
694	{	766	{
695	coro_stack *prev__stack;	767	coro_cctx *prev__cctx;
		768
		769	if (prev->flags & CF_NEW)
		770	{
		771	/* create a new empty context */
		772	Newz (0, prev->cctx, 1, coro_cctx);
		773	prev->cctx->inuse = 1;
		774	prev->flags &= ~CF_NEW;
		775	prev->flags |= CF_RUNNING;
		776	}
		777
		778	/*TODO: must not croak here */
		779	if (!prev->flags & CF_RUNNING)
		780	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		781
		782	if (next->flags & CF_RUNNING)
		783	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		784
		785	if (next->flags & CF_DESTROYED)
		786	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		787
		788	prev->flags &= ~CF_RUNNING;
		789	next->flags |= CF_RUNNING;
696		790
697	LOCK;	791	LOCK;
698		792
699	if (next->mainstack)	793	if (next->flags & CF_NEW)
700	{	794	{
701	/* coroutine already started */	795	/* need to start coroutine */
702	SAVE (prev, flags);	796	next->flags &= ~CF_NEW;
703	LOAD (next);	797	/* first get rid of the old state */
		798	save_perl (aTHX_ prev);
		799	/* setup coroutine call */
		800	setup_coro (aTHX_ next);
		801	/* need a new stack */
		802	assert (!next->cctx);
704	}	803	}
705	else	804	else
706	{	805	{
707	/* need to start coroutine */	806	/* coroutine already started */
708	/* first get rid of the old state */	807	save_perl (aTHX_ prev);
709	SAVE (prev, -1);	808	load_perl (aTHX_ next);
710	/* setup coroutine call */
711	setup_coro (next);
712	/* need a stack */
713	next->stack = 0;
714	}	809	}
715		810
716	prev__stack = prev->stack;	811	prev__cctx = prev->cctx;
717		812
718	/* possibly "free" the stack */	813	/* possibly "free" the cctx */
719	if (prev__stack->idle_sp == STACKLEVEL)	814	if (prev__cctx->idle_sp == STACKLEVEL)
720	{	815	{
721	stack_put (prev__stack);	816	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		817	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		818
722	prev->stack = 0;	819	prev->cctx = 0;
		820
		821	cctx_put (prev__cctx);
		822	prev__cctx->inuse = 0;
723	}	823	}
724		824
725	if (!next->stack)	825	if (!next->cctx)
726	next->stack = stack_get ();
727
728	if (prev__stack != next->stack)
729	{	826	{
730	prev__stack->top_env = PL_top_env;	827	next->cctx = cctx_get (aTHX);
731	PL_top_env = next->stack->top_env;	828	assert (!next->cctx->inuse);
732	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	829	next->cctx->inuse = 1;
733	}	830	}
734		831
		832	if (prev__cctx != next->cctx)
		833	{
		834	prev__cctx->top_env = PL_top_env;
		835	PL_top_env = next->cctx->top_env;
		836	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		837	}
		838
735	free_coro_mortal ();	839	free_coro_mortal (aTHX);
736
737	UNLOCK;	840	UNLOCK;
738	}	841	}
739	}	842	}
740		843
741	/* use this function pointer to call the above function */
742	/* this is done to increase chances of the compiler not inlining the call */
743	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
744	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
745
746	struct transfer_args	844	struct transfer_args
747	{	845	{
748	struct coro *prev, *next;	846	struct coro *prev, *next;
749	int flags;
750	};	847	};
751		848
752	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	849	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
753		850
		851	/** high level stuff ********************************************************/
		852
754	static void	853	static int
755	coro_state_destroy (struct coro *coro)	854	coro_state_destroy (pTHX_ struct coro *coro)
756	{	855	{
757	if (coro->refcnt--)	856	if (coro->flags & CF_DESTROYED)
758	return;	857	return 0;
		858
		859	coro->flags |= CF_DESTROYED;
		860
		861	if (coro->flags & CF_READY)
		862	{
		863	/* reduce nready, as destroying a ready coro effectively unreadies it */
		864	/* alternative: look through all ready queues and remove the coro */
		865	LOCK;
		866	--coro_nready;
		867	UNLOCK;
		868	}
		869	else
		870	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
759		871
760	if (coro->mainstack && coro->mainstack != main_mainstack)	872	if (coro->mainstack && coro->mainstack != main_mainstack)
761	{	873	{
762	struct coro temp;	874	struct coro temp;
763		875
764	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	876	assert (!(coro->flags & CF_RUNNING));
		877
		878	Zero (&temp, 1, struct coro);
		879	temp.save = CORO_SAVE_DEF;
		880
		881	if (coro->flags & CF_RUNNING)
		882	croak ("FATAL: tried to destroy currently running coroutine");
		883
		884	save_perl (aTHX_ &temp);
765	LOAD (aTHX_ coro);	885	load_perl (aTHX_ coro);
766		886
767	destroy_stacks (aTHX);	887	coro_destroy_stacks (aTHX);
768		888
769	LOAD ((&temp)); /* this will get rid of defsv etc.. */	889	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
770		890
771	coro->mainstack = 0;	891	coro->mainstack = 0;
772	}	892	}
773		893
774	stack_free (coro->stack);	894	cctx_destroy (coro->cctx);
775	SvREFCNT_dec (coro->args);	895	SvREFCNT_dec (coro->args);
776	Safefree (coro);	896
		897	return 1;
777	}	898	}
778		899
779	static int	900	static int
780	coro_state_clear (SV *sv, MAGIC *mg)	901	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
781	{	902	{
782	struct coro *coro = (struct coro *)mg->mg_ptr;	903	struct coro *coro = (struct coro *)mg->mg_ptr;
783	mg->mg_ptr = 0;	904	mg->mg_ptr = 0;
784		905
		906	if (--coro->refcnt < 0)
		907	{
785	coro_state_destroy (coro);	908	coro_state_destroy (aTHX_ coro);
		909	Safefree (coro);
		910	}
786		911
787	return 0;	912	return 0;
788	}	913	}
789		914
790	static int	915	static int
791	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	916	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
792	{	917	{
793	struct coro *coro = (struct coro *)mg->mg_ptr;	918	struct coro *coro = (struct coro *)mg->mg_ptr;
794		919
795	++coro->refcnt;	920	++coro->refcnt;
796		921
797	return 0;	922	return 0;
798	}	923	}
799		924
800	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	925	static MGVTBL coro_state_vtbl = {
		926	0, 0, 0, 0,
		927	coro_state_free,
		928	0,
		929	#ifdef MGf_DUP
		930	coro_state_dup,
		931	#else
		932	# define MGf_DUP 0
		933	#endif
		934	};
801		935
802	static struct coro *	936	static struct coro *
803	SvSTATE (SV *coro)	937	SvSTATE_ (pTHX_ SV *coro)
804	{	938	{
805	HV *stash;	939	HV *stash;
806	MAGIC *mg;	940	MAGIC *mg;
807		941
808	if (SvROK (coro))	942	if (SvROK (coro))
…		…
814	/* very slow, but rare, check */	948	/* very slow, but rare, check */
815	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	949	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
816	croak ("Coro::State object required");	950	croak ("Coro::State object required");
817	}	951	}
818		952
819	mg = SvMAGIC (coro);	953	mg = CORO_MAGIC (coro);
820	assert (mg->mg_type == PERL_MAGIC_ext);
821	return (struct coro *)mg->mg_ptr;	954	return (struct coro *)mg->mg_ptr;
822	}	955	}
823		956
		957	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		958
824	static void	959	static void
825	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	960	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
826	{	961	{
827	ta->prev = SvSTATE (prev);	962	ta->prev = SvSTATE (prev_sv);
828	ta->next = SvSTATE (next);	963	ta->next = SvSTATE (next_sv);
829	ta->flags = flags;
830	}	964	}
831		965
832	static void	966	static void
833	api_transfer (SV *prev, SV *next, int flags)	967	api_transfer (SV *prev_sv, SV *next_sv)
834	{	968	{
835	dTHX;	969	dTHX;
836	struct transfer_args ta;	970	struct transfer_args ta;
837		971
838	prepare_transfer (aTHX_ &ta, prev, next, flags);	972	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
839	TRANSFER (ta);	973	TRANSFER (ta);
840	}	974	}
841		975
		976	static int
		977	api_save (SV *coro_sv, int new_save)
		978	{
		979	dTHX;
		980	struct coro *coro = SvSTATE (coro_sv);
		981	int old_save = coro->save;
		982
		983	if (new_save >= 0)
		984	coro->save = new_save;
		985
		986	return old_save;
		987	}
		988
842	/** Coro ********************************************************************/	989	/** Coro ********************************************************************/
843		990
844	#define PRIO_MAX 3
845	#define PRIO_HIGH 1
846	#define PRIO_NORMAL 0
847	#define PRIO_LOW -1
848	#define PRIO_IDLE -3
849	#define PRIO_MIN -4
850
851	/* for Coro.pm */
852	static GV *coro_current, *coro_idle;
853	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
854	static int coro_nready;
855
856	static void	991	static void
857	coro_enq (pTHX_ SV *sv)	992	coro_enq (pTHX_ SV *coro_sv)
858	{	993	{
859	int prio;
860
861	if (SvTYPE (sv) != SVt_PVHV)
862	croak ("Coro::ready tried to enqueue something that is not a coroutine");
863
864	prio = SvSTATE (sv)->prio;
865
866	av_push (coro_ready [prio - PRIO_MIN], sv);	994	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
867	coro_nready++;
868	}	995	}
869		996
870	static SV *	997	static SV *
871	coro_deq (pTHX_ int min_prio)	998	coro_deq (pTHX_ int min_prio)
872	{	999	{
…		…
876	if (min_prio < 0)	1003	if (min_prio < 0)
877	min_prio = 0;	1004	min_prio = 0;
878		1005
879	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1006	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
880	if (AvFILLp (coro_ready [prio]) >= 0)	1007	if (AvFILLp (coro_ready [prio]) >= 0)
881	{
882	coro_nready--;
883	return av_shift (coro_ready [prio]);	1008	return av_shift (coro_ready [prio]);
884	}
885		1009
886	return 0;	1010	return 0;
887	}	1011	}
888		1012
889	static void	1013	static int
890	api_ready (SV *coro)	1014	api_ready (SV *coro_sv)
891	{	1015	{
892	dTHX;	1016	dTHX;
		1017	struct coro *coro;
893		1018
894	if (SvROK (coro))	1019	if (SvROK (coro_sv))
895	coro = SvRV (coro);	1020	coro_sv = SvRV (coro_sv);
		1021
		1022	coro = SvSTATE (coro_sv);
		1023
		1024	if (coro->flags & CF_READY)
		1025	return 0;
		1026
		1027	coro->flags |= CF_READY;
896		1028
897	LOCK;	1029	LOCK;
898	coro_enq (aTHX_ SvREFCNT_inc (coro));	1030	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1031	++coro_nready;
899	UNLOCK;	1032	UNLOCK;
900	}
901		1033
		1034	return 1;
		1035	}
		1036
902	static void	1037	static int
		1038	api_is_ready (SV *coro_sv)
		1039	{
		1040	dTHX;
		1041	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1042	}
		1043
		1044	static void
903	prepare_schedule (aTHX_ struct transfer_args *ta)	1045	prepare_schedule (pTHX_ struct transfer_args *ta)
904	{	1046	{
905	SV *current, *prev, *next;	1047	SV *prev_sv, *next_sv;
		1048
		1049	for (;;)
		1050	{
		1051	LOCK;
		1052	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1053
		1054	/* nothing to schedule: call the idle handler */
		1055	if (!next_sv)
		1056	{
		1057	dSP;
		1058	UNLOCK;
		1059
		1060	ENTER;
		1061	SAVETMPS;
		1062
		1063	PUSHMARK (SP);
		1064	PUTBACK;
		1065	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1066
		1067	FREETMPS;
		1068	LEAVE;
		1069	continue;
		1070	}
		1071
		1072	ta->next = SvSTATE (next_sv);
		1073
		1074	/* cannot transfer to destroyed coros, skip and look for next */
		1075	if (ta->next->flags & CF_DESTROYED)
		1076	{
		1077	UNLOCK;
		1078	SvREFCNT_dec (next_sv);
		1079	/* coro_nready is already taken care of by destroy */
		1080	continue;
		1081	}
		1082
		1083	--coro_nready;
		1084	UNLOCK;
		1085	break;
		1086	}
		1087
		1088	/* free this only after the transfer */
		1089	prev_sv = SvRV (coro_current);
		1090	SvRV_set (coro_current, next_sv);
		1091	ta->prev = SvSTATE (prev_sv);
		1092
		1093	assert (ta->next->flags & CF_READY);
		1094	ta->next->flags &= ~CF_READY;
906		1095
907	LOCK;	1096	LOCK;
908
909	current = GvSV (coro_current);
910
911	for (;;)
912	{
913	LOCK;
914
915	next = coro_deq (aTHX_ PRIO_MIN);
916
917	if (next)
918	break;
919
920	UNLOCK;
921
922	{
923	dSP;
924
925	ENTER;
926	SAVETMPS;
927
928	PUSHMARK (SP);
929	PUTBACK;
930	call_sv (GvSV (coro_idle), G_DISCARD);
931
932	FREETMPS;
933	LEAVE;
934	}
935	}
936
937	prev = SvRV (current);
938	SvRV (current) = next;
939
940	/* free this only after the transfer */
941	free_coro_mortal ();	1097	free_coro_mortal (aTHX);
942	coro_mortal = prev;	1098	coro_mortal = prev_sv;
943
944	ta->prev = SvSTATE (prev);
945	ta->next = SvSTATE (next);
946	ta->flags = TRANSFER_SAVE_ALL;
947
948	UNLOCK;	1099	UNLOCK;
949	}	1100	}
950		1101
951	static void	1102	static void
952	prepare_cede (aTHX_ struct transfer_args *ta)	1103	prepare_cede (pTHX_ struct transfer_args *ta)
953	{	1104	{
954	LOCK;	1105	api_ready (coro_current);
955	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
956	UNLOCK;
957
958	prepare_schedule (ta);	1106	prepare_schedule (aTHX_ ta);
		1107	}
		1108
		1109	static int
		1110	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1111	{
		1112	if (coro_nready)
		1113	{
		1114	SV *prev = SvRV (coro_current);
		1115	prepare_schedule (aTHX_ ta);
		1116	api_ready (prev);
		1117	return 1;
		1118	}
		1119	else
		1120	return 0;
959	}	1121	}
960		1122
961	static void	1123	static void
962	api_schedule (void)	1124	api_schedule (void)
963	{	1125	{
964	dTHX;	1126	dTHX;
965	struct transfer_args ta;	1127	struct transfer_args ta;
966		1128
967	prepare_schedule (&ta);	1129	prepare_schedule (aTHX_ &ta);
968	TRANSFER (ta);	1130	TRANSFER (ta);
969	}	1131	}
970		1132
971	static void	1133	static int
972	api_cede (void)	1134	api_cede (void)
973	{	1135	{
974	dTHX;	1136	dTHX;
975	struct transfer_args ta;	1137	struct transfer_args ta;
976		1138
977	prepare_cede (&ta);	1139	prepare_cede (aTHX_ &ta);
		1140
		1141	if (ta.prev != ta.next)
		1142	{
978	TRANSFER (ta);	1143	TRANSFER (ta);
		1144	return 1;
		1145	}
		1146	else
		1147	return 0;
		1148	}
		1149
		1150	static int
		1151	api_cede_notself (void)
		1152	{
		1153	dTHX;
		1154	struct transfer_args ta;
		1155
		1156	if (prepare_cede_notself (aTHX_ &ta))
		1157	{
		1158	TRANSFER (ta);
		1159	return 1;
		1160	}
		1161	else
		1162	return 0;
979	}	1163	}
980		1164
981	MODULE = Coro::State PACKAGE = Coro::State	1165	MODULE = Coro::State PACKAGE = Coro::State
982		1166
983	PROTOTYPES: DISABLE	1167	PROTOTYPES: DISABLE
…		…
989	#endif	1173	#endif
990	BOOT_PAGESIZE;	1174	BOOT_PAGESIZE;
991		1175
992	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1176	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
993		1177
994	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1178	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
995	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1179	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
996	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1180	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1181	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1182	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1183	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1184	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
997		1185
998	main_mainstack = PL_mainstack;	1186	main_mainstack = PL_mainstack;
		1187	main_top_env = PL_top_env;
		1188
		1189	while (main_top_env->je_prev)
		1190	main_top_env = main_top_env->je_prev;
999		1191
1000	coroapi.ver = CORO_API_VERSION;	1192	coroapi.ver = CORO_API_VERSION;
1001	coroapi.transfer = api_transfer;	1193	coroapi.transfer = api_transfer;
1002
1003	Newz (0, main_stack, 1, coro_stack);
1004	main_stack->idle_sp = (void *)-1;
1005		1194
1006	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1195	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1007	}	1196	}
1008		1197
1009	SV *	1198	SV *
…		…
1014	HV *hv;	1203	HV *hv;
1015	int i;	1204	int i;
1016		1205
1017	Newz (0, coro, 1, struct coro);	1206	Newz (0, coro, 1, struct coro);
1018	coro->args = newAV ();	1207	coro->args = newAV ();
		1208	coro->save = CORO_SAVE_DEF;
		1209	coro->flags = CF_NEW;
1019		1210
1020	hv = newHV ();	1211	hv = newHV ();
1021	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1212	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1022	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1213	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1023		1214
1024	for (i = 1; i < items; i++)	1215	for (i = 1; i < items; i++)
1025	av_push (coro->args, newSVsv (ST (i)));	1216	av_push (coro->args, newSVsv (ST (i)));
1026
1027	coro->stack = main_stack;
1028	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1029	/*coro->stack = 0;*/
1030	}	1217	}
1031	OUTPUT:	1218	OUTPUT:
1032	RETVAL	1219	RETVAL
1033		1220
		1221	int
		1222	save (SV *coro, int new_save = -1)
		1223	CODE:
		1224	RETVAL = api_save (coro, new_save);
		1225	OUTPUT:
		1226	RETVAL
		1227
		1228	int
		1229	save_also (SV *coro_sv, int save_also)
		1230	CODE:
		1231	{
		1232	struct coro *coro = SvSTATE (coro_sv);
		1233	RETVAL = coro->save;
		1234	coro->save |= save_also;
		1235	}
		1236	OUTPUT:
		1237	RETVAL
		1238
1034	void	1239	void
1035	transfer (...)	1240	_set_stacklevel (...)
1036	ALIAS:	1241	ALIAS:
1037	Coro::schedule = 1	1242	Coro::State::transfer = 1
1038	Coro::cede = 2	1243	Coro::schedule = 2
1039	_set_stacklevel = 3	1244	Coro::cede = 3
		1245	Coro::cede_notself = 4
1040	CODE:	1246	CODE:
1041	{	1247	{
1042	struct transfer_args ta;	1248	struct transfer_args ta;
1043		1249
1044	switch (ix)	1250	switch (ix)
1045	{	1251	{
1046	case 0:	1252	case 0:
1047	if (items != 3)	1253	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1048	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1254	ta.next = 0;
1049
1050	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1051	break;	1255	break;
1052		1256
1053	case 1:	1257	case 1:
1054	prepare_schedule (&ta);	1258	if (items != 2)
		1259	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1260
		1261	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1055	break;	1262	break;
1056		1263
1057	case 2:	1264	case 2:
1058	prepare_cede (&ta);	1265	prepare_schedule (aTHX_ &ta);
1059	break;	1266	break;
1060		1267
1061	case 3:	1268	case 3:
1062	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1269	prepare_cede (aTHX_ &ta);
1063	ta.next = 0;	1270	break;
1064	ta.flags = TRANSFER_SET_STACKLEVEL;	1271
		1272	case 4:
		1273	if (!prepare_cede_notself (aTHX_ &ta))
		1274	XSRETURN_EMPTY;
		1275
1065	break;	1276	break;
1066	}	1277	}
1067		1278
		1279	BARRIER;
1068	TRANSFER (ta);	1280	TRANSFER (ta);
1069	}
1070		1281
1071	void	1282	if (GIMME_V != G_VOID && ta.next != ta.prev)
1072	_clone_state_from (SV *dst, SV *src)	1283	XSRETURN_YES;
		1284	}
		1285
		1286	bool
		1287	_destroy (SV *coro_sv)
1073	CODE:	1288	CODE:
1074	{	1289	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1075	struct coro *coro_src = SvSTATE (src);	1290	OUTPUT:
1076		1291	RETVAL
1077	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1078
1079	++coro_src->refcnt;
1080	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1081	}
1082
1083	void
1084	_nonlocal_goto (IV nextop)
1085	CODE:
1086	/* uuh, somebody will kill me again for this */
1087	PL_op->op_next = INT2PTR (OP *, nextop);
1088		1292
1089	void	1293	void
1090	_exit (code)	1294	_exit (code)
1091	int code	1295	int code
1092	PROTOTYPE: $	1296	PROTOTYPE: $
1093	CODE:	1297	CODE:
1094	_exit (code);	1298	_exit (code);
1095		1299
1096	MODULE = Coro::State PACKAGE = Coro::Cont	1300	int
		1301	cctx_stacksize (int new_stacksize = 0)
		1302	CODE:
		1303	RETVAL = coro_stacksize;
		1304	if (new_stacksize)
		1305	coro_stacksize = new_stacksize;
		1306	OUTPUT:
		1307	RETVAL
1097		1308
1098	void	1309	int
1099	yield (...)	1310	cctx_count ()
1100	PROTOTYPE: @	1311	CODE:
1101	CODE:	1312	RETVAL = cctx_count;
1102	{	1313	OUTPUT:
1103	SV *yieldstack;	1314	RETVAL
1104	SV *sv;
1105	AV *defav = GvAV (PL_defgv);
1106	struct coro *prev, *next;
1107		1315
1108	yieldstack = *hv_fetch (	1316	int
1109	(HV *)SvRV (GvSV (coro_current)),	1317	cctx_idle ()
1110	"yieldstack", sizeof ("yieldstack") - 1,	1318	CODE:
1111	0	1319	RETVAL = cctx_idle;
1112	);	1320	OUTPUT:
1113		1321	RETVAL
1114	/* set up @_ -- ugly */
1115	av_clear (defav);
1116	av_fill (defav, items - 1);
1117	while (items--)
1118	av_store (defav, items, SvREFCNT_inc (ST(items)));
1119
1120	sv = av_pop ((AV *)SvRV (yieldstack));
1121	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1122	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1123	SvREFCNT_dec (sv);
1124
1125	coro_state_transfer (aTHX_ prev, next, 0);
1126	}
1127		1322
1128	MODULE = Coro::State PACKAGE = Coro	1323	MODULE = Coro::State PACKAGE = Coro
1129		1324
1130	BOOT:	1325	BOOT:
1131	{	1326	{
…		…
1138	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1333	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1139	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1334	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1140	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1335	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1141	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1336	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1142		1337
1143	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1338	coro_current = get_sv ("Coro::current", FALSE);
1144	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1339	SvREADONLY_on (coro_current);
1145		1340
1146	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1341	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1147	coro_ready[i] = newAV ();	1342	coro_ready[i] = newAV ();
1148		1343
1149	{	1344	{
1150	SV *sv = perl_get_sv("Coro::API", 1);	1345	SV *sv = perl_get_sv("Coro::API", 1);
1151		1346
1152	coroapi.schedule = api_schedule;	1347	coroapi.schedule = api_schedule;
		1348	coroapi.save = api_save;
1153	coroapi.cede = api_cede;	1349	coroapi.cede = api_cede;
		1350	coroapi.cede_notself = api_cede_notself;
1154	coroapi.ready = api_ready;	1351	coroapi.ready = api_ready;
		1352	coroapi.is_ready = api_is_ready;
1155	coroapi.nready = &coro_nready;	1353	coroapi.nready = &coro_nready;
1156	coroapi.current = coro_current;	1354	coroapi.current = coro_current;
1157		1355
1158	GCoroAPI = &coroapi;	1356	GCoroAPI = &coroapi;
1159	sv_setiv (sv, (IV)&coroapi);	1357	sv_setiv (sv, (IV)&coroapi);
1160	SvREADONLY_on (sv);	1358	SvREADONLY_on (sv);
1161	}	1359	}
1162	}	1360	}
		1361
		1362	void
		1363	_set_current (SV *current)
		1364	PROTOTYPE: $
		1365	CODE:
		1366	SvREFCNT_dec (SvRV (coro_current));
		1367	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1163		1368
1164	int	1369	int
1165	prio (Coro::State coro, int newprio = 0)	1370	prio (Coro::State coro, int newprio = 0)
1166	ALIAS:	1371	ALIAS:
1167	nice = 1	1372	nice = 1
…		…
1170	RETVAL = coro->prio;	1375	RETVAL = coro->prio;
1171		1376
1172	if (items > 1)	1377	if (items > 1)
1173	{	1378	{
1174	if (ix)	1379	if (ix)
1175	newprio += coro->prio;	1380	newprio = coro->prio - newprio;
1176		1381
1177	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1382	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1178	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1383	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1179		1384
1180	coro->prio = newprio;	1385	coro->prio = newprio;
1181	}	1386	}
1182	}	1387	}
		1388	OUTPUT:
		1389	RETVAL
1183		1390
1184	void	1391	SV *
1185	ready (SV *self)	1392	ready (SV *self)
1186	PROTOTYPE: $	1393	PROTOTYPE: $
1187	CODE:	1394	CODE:
1188	api_ready (self);	1395	RETVAL = boolSV (api_ready (self));
		1396	OUTPUT:
		1397	RETVAL
		1398
		1399	SV *
		1400	is_ready (SV *self)
		1401	PROTOTYPE: $
		1402	CODE:
		1403	RETVAL = boolSV (api_is_ready (self));
		1404	OUTPUT:
		1405	RETVAL
1189		1406
1190	int	1407	int
1191	nready (...)	1408	nready (...)
1192	PROTOTYPE:	1409	PROTOTYPE:
1193	CODE:	1410	CODE:
…		…
1199		1416
1200	SV *	1417	SV *
1201	_get_state ()	1418	_get_state ()
1202	CODE:	1419	CODE:
1203	{	1420	{
1204	struct {	1421	struct io_state *data;
1205	int errorno;
1206	int laststype;
1207	int laststatval;
1208	Stat_t statcache;
1209	} data;
1210		1422
		1423	RETVAL = newSV (sizeof (struct io_state));
		1424	data = (struct io_state *)SvPVX (RETVAL);
		1425	SvCUR_set (RETVAL, sizeof (struct io_state));
		1426	SvPOK_only (RETVAL);
		1427
1211	data.errorno = errno;	1428	data->errorno = errno;
1212	data.laststype = PL_laststype;	1429	data->laststype = PL_laststype;
1213	data.laststatval = PL_laststatval;	1430	data->laststatval = PL_laststatval;
1214	data.statcache = PL_statcache;	1431	data->statcache = PL_statcache;
1215
1216	RETVAL = newSVpvn ((char *)&data, sizeof data);
1217	}	1432	}
1218	OUTPUT:	1433	OUTPUT:
1219	RETVAL	1434	RETVAL
1220		1435
1221	void	1436	void
1222	_set_state (char *data_)	1437	_set_state (char *data_)
1223	PROTOTYPE: $	1438	PROTOTYPE: $
1224	CODE:	1439	CODE:
1225	{	1440	{
1226	struct {	1441	struct io_state *data = (void *)data_;
1227	int errorno;
1228	int laststype;
1229	int laststatval;
1230	Stat_t statcache;
1231	} *data = (void *)data_;
1232		1442
1233	errno = data->errorno;	1443	errno = data->errorno;
1234	PL_laststype = data->laststype;	1444	PL_laststype = data->laststype;
1235	PL_laststatval = data->laststatval;	1445	PL_laststatval = data->laststatval;
1236	PL_statcache = data->statcache;	1446	PL_statcache = data->statcache;
1237	}	1447	}
		1448

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