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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.77 by root, Tue Oct 31 23:55:33 2006 UTC vs.
Revision 1.149 by root, Sat Apr 14 15:06:05 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 <errno.h>	75	/* 5.8.7 */
33		76	#ifndef SvRV_set
34	#ifdef HAVE_MMAP	77	# define SvRV_set(s,v) SvRV(s) = (v)
35	# include <unistd.h>
36	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS
38	# ifdef MAP_ANON
39	# define MAP_ANONYMOUS MAP_ANON
40	# else
41	# undef HAVE_MMAP
42	# endif
43	# endif	78	#endif
44	#endif
45		79
46	#define SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	#define UCORO_STATE "_coro_state"	81	# undef CORO_STACKGUARD
		82	#endif
		83
		84	#ifndef CORO_STACKGUARD
		85	# define CORO_STACKGUARD 0
		86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
48		92
49	/* 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
50	* 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
51	* and should be unique. */	95	* and should be unique. */
		96	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	97	#define STACKLEVEL ((void *)&stacklevel)
53		98
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		100
56	#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))
57		110
58	#include "CoroAPI.h"	111	#include "CoroAPI.h"
59		112
60	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
…		…
64	#else	117	#else
65	# define LOCK (void)0	118	# define LOCK (void)0
66	# define UNLOCK (void)0	119	# define UNLOCK (void)0
67	#endif	120	#endif
68		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;
69	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
70	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;
71	static HV *coro_state_stash;	135	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV *coro_mortal; /* will be freed after next transfer */	136	static SV *coro_mortal; /* will be freed after next transfer */
75		137
76	/* this is actually not only the c stack but also c registers etc... */	138	static struct coro_cctx *cctx_first;
		139	static int cctx_count, cctx_idle;
		140
		141	/* this is a structure representing a c-level coroutine */
77	typedef struct {	142	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	143	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		144
		145	/* the stack */
		146	void *sptr;
		147	size_t ssize;
		148
		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;
82	coro_context cctx;	153	coro_context cctx;
83		154
84	void *sptr;	155	#if CORO_USE_VALGRIND
85	long ssize; /* positive == mmap, otherwise malloc */	156	int valgrind_id;
86	} coro_stack;	157	#endif
		158	char inuse, mapped;
		159	} coro_cctx;
87		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	};
		167
		168	/* this is a structure representing a perl-level coroutine */
88	struct coro {	169	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	170	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	171	coro_cctx *cctx;
91
92	/* the optional C context */
93	coro_stack *stack;
94	void *cursp;
95	int gencnt;
96
97	/* optionally saved, might be zero */
98	AV *defav;
99	SV *defsv;
100	SV *errsv;
101
102	/* saved global state not related to stacks */
103	U8 dowarn;
104	I32 in_eval;
105
106	/* the stacks and related info (callchain etc..) */
107	PERL_SI *curstackinfo;
108	AV *curstack;
109	AV *mainstack;
110	SV **stack_sp;
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	CV *compcv;
115	SV **stack_base;
116	SV **stack_max;
117	SV **tmps_stack;
118	I32 tmps_floor;
119	I32 tmps_ix;
120	I32 tmps_max;
121	I32 *markstack;
122	I32 *markstack_ptr;
123	I32 *markstack_max;
124	I32 *scopestack;
125	I32 scopestack_ix;
126	I32 scopestack_max;
127	ANY *savestack;
128	I32 savestack_ix;
129	I32 savestack_max;
130	OP **retstack;
131	I32 retstack_ix;
132	I32 retstack_max;
133	PMOP *curpm;
134	COP *curcop;
135	JMPENV *top_env;
136		172
137	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
138	AV *args;	174	AV *args;
		175	int refcnt;
		176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
		178
		179	/* optionally saved, might be zero */
		180	AV *defav; /* @_ */
		181	SV *defsv; /* $_ */
		182	SV *errsv; /* $@ */
		183	GV *deffh; /* default filehandle */
		184	SV *irssv; /* $/ */
		185	SV *irssv_sv; /* real $/ cache */
		186
		187	#define VAR(name,type) type name;
		188	# include "state.h"
		189	#undef VAR
		190
		191	/* coro process data */
		192	int prio;
139	};	193	};
140		194
141	typedef struct coro *Coro__State;	195	typedef struct coro *Coro__State;
142	typedef struct coro *Coro__State_or_hashref;	196	typedef struct coro *Coro__State_or_hashref;
143		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
144	static AV *	214	static AV *
145	coro_clone_padlist (pTHX_ CV *cv)	215	coro_clone_padlist (pTHX_ CV *cv)
146	{	216	{
147	AV *padlist = CvPADLIST (cv);	217	AV *padlist = CvPADLIST (cv);
148	AV *newpadlist, *newpad;	218	AV *newpadlist, *newpad;
149		219
150	newpadlist = newAV ();	220	newpadlist = newAV ();
151	AvREAL_off (newpadlist);	221	AvREAL_off (newpadlist);
		222	#if PERL_VERSION_ATLEAST (5,9,0)
		223	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		224	#else
152	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	225	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		226	#endif
153	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	227	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
154	--AvFILLp (padlist);	228	--AvFILLp (padlist);
155		229
156	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	230	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
157	av_store (newpadlist, 1, (SV *)newpad);	231	av_store (newpadlist, 1, (SV *)newpad);
…		…
200		274
201	#define PERL_MAGIC_coro PERL_MAGIC_ext	275	#define PERL_MAGIC_coro PERL_MAGIC_ext
202		276
203	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	277	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
204		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
205	/* the next two functions merely cache the padlists */	286	/* the next two functions merely cache the padlists */
206	static void	287	static void
207	get_padlist (pTHX_ CV *cv)	288	get_padlist (pTHX_ CV *cv)
208	{	289	{
209	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	290	MAGIC *mg = CORO_MAGIC (cv);
		291	AV *av;
210		292
211	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	293	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
212	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	294	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
213	else	295	else
214	{	296	{
215	#if 0	297	#if CORO_PREFER_PERL_FUNCTIONS
216	/* this should work - but it doesn't :( */	298	/* this is probably cleaner, but also slower? */
217	CV *cp = Perl_cv_clone (aTHX_ cv);	299	CV *cp = Perl_cv_clone (cv);
218	CvPADLIST (cv) = CvPADLIST (cp);	300	CvPADLIST (cv) = CvPADLIST (cp);
219	CvPADLIST (cp) = 0;	301	CvPADLIST (cp) = 0;
220	SvREFCNT_dec (cp);	302	SvREFCNT_dec (cp);
221	#else	303	#else
222	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	304	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
225	}	307	}
226		308
227	static void	309	static void
228	put_padlist (pTHX_ CV *cv)	310	put_padlist (pTHX_ CV *cv)
229	{	311	{
230	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	312	MAGIC *mg = CORO_MAGIC (cv);
		313	AV *av;
231		314
232	if (!mg)	315	if (!mg)
233	{	316	{
234	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	317	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
235	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	318	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
236	mg->mg_virtual = &vtbl_coro;	319	mg->mg_virtual = &vtbl_coro;
237	mg->mg_obj = (SV *)newAV ();	320	mg->mg_obj = (SV *)newAV ();
238	}	321	}
239		322
240	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);
241	}	329	}
		330
		331	/** load & save, init *******************************************************/
242		332
243	#define SB do {	333	#define SB do {
244	#define SE } while (0)	334	#define SE } while (0)
245		335
246	#define LOAD(state) load_state(aTHX_ (state));
247	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
248
249	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	336	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
250		337
251	static void	338	static void
252	load_state(pTHX_ Coro__State c)	339	load_perl (pTHX_ Coro__State c)
253	{	340	{
254	PL_dowarn = c->dowarn;	341	#define VAR(name,type) PL_ ## name = c->name;
255	PL_in_eval = c->in_eval;	342	# include "state.h"
256		343	#undef VAR
257	PL_curstackinfo = c->curstackinfo;
258	PL_curstack = c->curstack;
259	PL_mainstack = c->mainstack;
260	PL_stack_sp = c->stack_sp;
261	PL_op = c->op;
262	PL_curpad = c->curpad;
263	PL_comppad = c->comppad;
264	PL_compcv = c->compcv;
265	PL_stack_base = c->stack_base;
266	PL_stack_max = c->stack_max;
267	PL_tmps_stack = c->tmps_stack;
268	PL_tmps_floor = c->tmps_floor;
269	PL_tmps_ix = c->tmps_ix;
270	PL_tmps_max = c->tmps_max;
271	PL_markstack = c->markstack;
272	PL_markstack_ptr = c->markstack_ptr;
273	PL_markstack_max = c->markstack_max;
274	PL_scopestack = c->scopestack;
275	PL_scopestack_ix = c->scopestack_ix;
276	PL_scopestack_max = c->scopestack_max;
277	PL_savestack = c->savestack;
278	PL_savestack_ix = c->savestack_ix;
279	PL_savestack_max = c->savestack_max;
280	#if PERL_VERSION < 9
281	PL_retstack = c->retstack;
282	PL_retstack_ix = c->retstack_ix;
283	PL_retstack_max = c->retstack_max;
284	#endif
285	PL_curpm = c->curpm;
286	PL_curcop = c->curcop;
287	PL_top_env = c->top_env;
288		344
289	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	345	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
290	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	346	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
291	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	}
292		364
293	{	365	{
294	dSP;	366	dSP;
295	CV *cv;	367	CV *cv;
296		368
297	/* now do the ugly restore mess */	369	/* now do the ugly restore mess */
298	while ((cv = (CV *)POPs))	370	while ((cv = (CV *)POPs))
299	{	371	{
300	AV *padlist = (AV *)POPs;
301
302	if (padlist)
303	{
304	put_padlist (aTHX_ cv); /* mark this padlist as available */	372	put_padlist (aTHX_ cv); /* mark this padlist as available */
305	CvPADLIST(cv) = padlist;	373	CvDEPTH (cv) = PTR2IV (POPs);
306	}	374	CvPADLIST (cv) = (AV *)POPs;
307
308	++CvDEPTH(cv);
309	}	375	}
310		376
311	PUTBACK;	377	PUTBACK;
312	}	378	}
		379	assert (!PL_comppad || AvARRAY (PL_comppad));//D
313	}	380	}
314		381
315	static void	382	static void
316	save_state(pTHX_ Coro__State c, int flags)	383	save_perl (pTHX_ Coro__State c)
317	{	384	{
		385	assert (!PL_comppad || AvARRAY (PL_comppad));//D
318	{	386	{
319	dSP;	387	dSP;
320	I32 cxix = cxstack_ix;	388	I32 cxix = cxstack_ix;
321	PERL_CONTEXT *ccstk = cxstack;	389	PERL_CONTEXT *ccstk = cxstack;
322	PERL_SI *top_si = PL_curstackinfo;	390	PERL_SI *top_si = PL_curstackinfo;
…		…
324	/*	392	/*
325	* 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
326	* (and reinitialize) all cv's in the whole callchain :(	394	* (and reinitialize) all cv's in the whole callchain :(
327	*/	395	*/
328		396
		397	EXTEND (SP, 3 + 1);
329	PUSHs (Nullsv);	398	PUSHs (Nullsv);
330	/* this loop was inspired by pp_caller */	399	/* this loop was inspired by pp_caller */
331	for (;;)	400	for (;;)
332	{	401	{
333	while (cxix >= 0)	402	while (cxix >= 0)
334	{	403	{
335	PERL_CONTEXT *cx = &ccstk[cxix--];	404	PERL_CONTEXT *cx = &ccstk[cxix--];
336		405
337	if (CxTYPE(cx) == CXt_SUB)	406	if (CxTYPE (cx) == CXt_SUB)
338	{	407	{
339	CV *cv = cx->blk_sub.cv;	408	CV *cv = cx->blk_sub.cv;
		409
340	if (CvDEPTH(cv))	410	if (CvDEPTH (cv))
341	{	411	{
342	EXTEND (SP, CvDEPTH(cv)*2);	412	EXTEND (SP, 3);
343
344	while (--CvDEPTH(cv))
345	{
346	/* this tells the restore code to increment CvDEPTH */
347	PUSHs (Nullsv);
348	PUSHs ((SV *)cv);
349	}
350
351	PUSHs ((SV *)CvPADLIST(cv));	413	PUSHs ((SV *)CvPADLIST (cv));
		414	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
352	PUSHs ((SV *)cv);	415	PUSHs ((SV *)cv);
353		416
		417	CvDEPTH (cv) = 0;
354	get_padlist (aTHX_ cv);	418	get_padlist (aTHX_ cv);
355	}	419	}
356	}	420	}
357	#ifdef CXt_FORMAT
358	else if (CxTYPE(cx) == CXt_FORMAT)
359	{
360	/* I never used formats, so how should I know how these are implemented? */
361	/* my bold guess is as a simple, plain sub... */
362	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
363	}
364	#endif
365	}	421	}
366		422
367	if (top_si->si_type == PERLSI_MAIN)	423	if (top_si->si_type == PERLSI_MAIN)
368	break;	424	break;
369		425
…		…
373	}	429	}
374		430
375	PUTBACK;	431	PUTBACK;
376	}	432	}
377		433
378	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;
379	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	435	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
380	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;
381		439
382	c->dowarn = PL_dowarn;	440	#define VAR(name,type)c->name = PL_ ## name;
383	c->in_eval = PL_in_eval;	441	# include "state.h"
384		442	#undef VAR
385	c->curstackinfo = PL_curstackinfo;
386	c->curstack = PL_curstack;
387	c->mainstack = PL_mainstack;
388	c->stack_sp = PL_stack_sp;
389	c->op = PL_op;
390	c->curpad = PL_curpad;
391	c->comppad = PL_comppad;
392	c->compcv = PL_compcv;
393	c->stack_base = PL_stack_base;
394	c->stack_max = PL_stack_max;
395	c->tmps_stack = PL_tmps_stack;
396	c->tmps_floor = PL_tmps_floor;
397	c->tmps_ix = PL_tmps_ix;
398	c->tmps_max = PL_tmps_max;
399	c->markstack = PL_markstack;
400	c->markstack_ptr = PL_markstack_ptr;
401	c->markstack_max = PL_markstack_max;
402	c->scopestack = PL_scopestack;
403	c->scopestack_ix = PL_scopestack_ix;
404	c->scopestack_max = PL_scopestack_max;
405	c->savestack = PL_savestack;
406	c->savestack_ix = PL_savestack_ix;
407	c->savestack_max = PL_savestack_max;
408	#if PERL_VERSION < 9
409	c->retstack = PL_retstack;
410	c->retstack_ix = PL_retstack_ix;
411	c->retstack_max = PL_retstack_max;
412	#endif
413	c->curpm = PL_curpm;
414	c->curcop = PL_curcop;
415	c->top_env = PL_top_env;
416	}	443	}
417		444
418	/*	445	/*
419	* allocate various perl stacks. This is an exact copy	446	* allocate various perl stacks. This is an exact copy
420	* of perl.c:init_stacks, except that it uses less memory	447	* of perl.c:init_stacks, except that it uses less memory
421	* on the (sometimes correct) assumption that coroutines do	448	* on the (sometimes correct) assumption that coroutines do
422	* not usually need a lot of stackspace.	449	* not usually need a lot of stackspace.
423	*/	450	*/
		451	#if CORO_PREFER_PERL_FUNCTIONS
		452	# define coro_init_stacks init_stacks
		453	#else
424	static void	454	static void
425	coro_init_stacks (pTHX)	455	coro_init_stacks (pTHX)
426	{	456	{
427	LOCK;
428
429	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	457	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
430	PL_curstackinfo->si_type = PERLSI_MAIN;	458	PL_curstackinfo->si_type = PERLSI_MAIN;
431	PL_curstack = PL_curstackinfo->si_stack;	459	PL_curstack = PL_curstackinfo->si_stack;
432	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	460	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
433		461
434	PL_stack_base = AvARRAY(PL_curstack);	462	PL_stack_base = AvARRAY(PL_curstack);
435	PL_stack_sp = PL_stack_base;	463	PL_stack_sp = PL_stack_base;
436	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	464	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
437		465
438	New(50,PL_tmps_stack,96,SV*);	466	New(50,PL_tmps_stack,128,SV*);
439	PL_tmps_floor = -1;	467	PL_tmps_floor = -1;
440	PL_tmps_ix = -1;	468	PL_tmps_ix = -1;
441	PL_tmps_max = 96;	469	PL_tmps_max = 128;
442		470
443	New(54,PL_markstack,16,I32);	471	New(54,PL_markstack,32,I32);
444	PL_markstack_ptr = PL_markstack;	472	PL_markstack_ptr = PL_markstack;
445	PL_markstack_max = PL_markstack + 16;	473	PL_markstack_max = PL_markstack + 32;
446		474
447	#ifdef SET_MARK_OFFSET	475	#ifdef SET_MARK_OFFSET
448	SET_MARK_OFFSET;	476	SET_MARK_OFFSET;
449	#endif	477	#endif
450		478
451	New(54,PL_scopestack,16,I32);	479	New(54,PL_scopestack,32,I32);
452	PL_scopestack_ix = 0;	480	PL_scopestack_ix = 0;
453	PL_scopestack_max = 16;	481	PL_scopestack_max = 32;
454		482
455	New(54,PL_savestack,96,ANY);	483	New(54,PL_savestack,64,ANY);
456	PL_savestack_ix = 0;	484	PL_savestack_ix = 0;
457	PL_savestack_max = 96;	485	PL_savestack_max = 64;
458		486
459	#if PERL_VERSION < 9	487	#if !PERL_VERSION_ATLEAST (5,9,0)
460	New(54,PL_retstack,8,OP*);	488	New(54,PL_retstack,16,OP*);
461	PL_retstack_ix = 0;	489	PL_retstack_ix = 0;
462	PL_retstack_max = 8;	490	PL_retstack_max = 16;
463	#endif	491	#endif
464
465	UNLOCK;
466	}	492	}
		493	#endif
467		494
468	/*	495	/*
469	* destroy the stacks, the callchain etc...	496	* destroy the stacks, the callchain etc...
470	*/	497	*/
471	static void	498	static void
472	destroy_stacks(pTHX)	499	coro_destroy_stacks (pTHX)
473	{	500	{
474	if (!IN_DESTRUCT)	501	if (!IN_DESTRUCT)
475	{	502	{
476	/* is this ugly, I ask? */	503	/* restore all saved variables and stuff */
477	LEAVE_SCOPE (0);	504	LEAVE_SCOPE (0);
		505	assert (PL_tmps_floor == -1);
478		506
479	/* sure it is, but more important: is it correct?? :/ */	507	/* free all temporaries */
480	FREETMPS;	508	FREETMPS;
		509	assert (PL_tmps_ix == -1);
481		510
		511	/* unwind all extra stacks */
482	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	512	POPSTACK_TO (PL_mainstack);
		513
		514	/* unwind main stack */
		515	dounwind (-1);
483	}	516	}
484		517
485	while (PL_curstackinfo->si_next)	518	while (PL_curstackinfo->si_next)
486	PL_curstackinfo = PL_curstackinfo->si_next;	519	PL_curstackinfo = PL_curstackinfo->si_next;
487		520
488	while (PL_curstackinfo)	521	while (PL_curstackinfo)
489	{	522	{
490	PERL_SI *p = PL_curstackinfo->si_prev;	523	PERL_SI *p = PL_curstackinfo->si_prev;
491		524
492	{ /*D*//*remove*/
493	dSP;
494	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
495	PUTBACK; /* possibly superfluous */
496	}
497
498	if (!IN_DESTRUCT)	525	if (!IN_DESTRUCT)
499	{
500	dounwind (-1);/*D*//*remove*/
501	SvREFCNT_dec (PL_curstackinfo->si_stack);	526	SvREFCNT_dec (PL_curstackinfo->si_stack);
502	}
503		527
504	Safefree (PL_curstackinfo->si_cxstack);	528	Safefree (PL_curstackinfo->si_cxstack);
505	Safefree (PL_curstackinfo);	529	Safefree (PL_curstackinfo);
506	PL_curstackinfo = p;	530	PL_curstackinfo = p;
507	}	531	}
508		532
509	Safefree (PL_tmps_stack);	533	Safefree (PL_tmps_stack);
510	Safefree (PL_markstack);	534	Safefree (PL_markstack);
511	Safefree (PL_scopestack);	535	Safefree (PL_scopestack);
512	Safefree (PL_savestack);	536	Safefree (PL_savestack);
513	#if PERL_VERSION < 9	537	#if !PERL_VERSION_ATLEAST (5,9,0)
514	Safefree (PL_retstack);	538	Safefree (PL_retstack);
515	#endif	539	#endif
516	}	540	}
517		541
518	static void	542	/** coroutine stack handling ************************************************/
519	allocate_stack (Coro__State ctx, int alloc)
520	{
521	coro_stack *stack;
522		543
523	New (0, stack, 1, coro_stack);
524
525	stack->refcnt = 1;
526	stack->usecnt = 1;
527	stack->gencnt = ctx->gencnt = 0;
528
529	if (alloc)
530	{
531	#if HAVE_MMAP
532	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
533	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
534	if (stack->sptr == (void *)-1)
535	#endif
536	{
537	stack->ssize = - (STACKSIZE * (long)sizeof (long));
538	New (0, stack->sptr, STACKSIZE, long);
539	}
540	}
541	else
542	stack->sptr = 0;
543
544	ctx->stack = stack;
545	}
546
547	static void	544	static void
548	deallocate_stack (Coro__State ctx)	545	setup_coro (pTHX_ struct coro *coro)
549	{
550	coro_stack *stack = ctx->stack;
551
552	ctx->stack = 0;
553
554	if (stack)
555	{
556	if (!--stack->refcnt)
557	{
558	#ifdef HAVE_MMAP
559	if (stack->ssize > 0 && stack->sptr)
560	munmap (stack->sptr, stack->ssize);
561	else
562	#endif
563	Safefree (stack->sptr);
564
565	Safefree (stack);
566	}
567	else if (ctx->gencnt == stack->gencnt)
568	--stack->usecnt;
569	}
570	}
571
572	static void
573	setup_coro (void *arg)
574	{	546	{
575	/*	547	/*
576	* emulate part of the perl startup here.	548	* emulate part of the perl startup here.
577	*/	549	*/
		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 (av_shift (GvAV (PL_defgv)));
		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	{
		598	dSP;
		599	LOGOP myop;
		600
		601	Zero (&myop, 1, LOGOP);
		602	myop.op_next = PL_op;
		603	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		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;
		610	PL_op = (OP *)&myop;
		611	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		612	SPAGAIN;
		613	}
		614
		615	/*
		616	* this is a _very_ stripped down perl interpreter ;)
		617	*/
		618	static void
		619	coro_run (void *arg)
		620	{
578	dTHX;	621	dTHX;
579	dSP;
580	Coro__State ctx = (Coro__State)arg;
581	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
582		622
583	coro_init_stacks (aTHX);	623	/* coro_run is the alternative tail of transfer(), so unlock here. */
584	/*PL_curcop = 0;*/	624	UNLOCK;
585	/*PL_in_eval = PL_in_eval;*/ /* inherit */
586	SvREFCNT_dec (GvAV (PL_defgv));
587	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
588		625
589	SPAGAIN;	626	PL_top_env = &PL_start_env;
590		627
591	if (ctx->stack)	628	/* inject a fake subroutine call to cctx_init */
592	{	629	prepare_cctx (aTHX_ (coro_cctx *)arg);
593	ctx->cursp = 0;
594		630
595	PUSHMARK(SP);	631	/* somebody or something will hit me for both perl_run and PL_restartop */
596	PUTBACK;	632	PL_restartop = PL_op;
597	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	633	perl_run (PL_curinterp);
598		634
599	if (SvTRUE (ERRSV))	635	/*
600	croak (NULL);	636	* If perl-run returns we assume exit() was being called or the coro
601	else	637	* fell off the end, which seems to be the only valid (non-bug)
602	croak ("FATAL: CCTXT coroutine returned!");	638	* reason for perl_run to return. We try to exit by jumping to the
		639	* bootstrap-time "top" top_env, as we cannot restore the "main"
		640	* coroutine as Coro has no such concept
		641	*/
		642	PL_top_env = main_top_env;
		643	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		644	}
		645
		646	static coro_cctx *
		647	cctx_new ()
		648	{
		649	coro_cctx *cctx;
		650	void *stack_start;
		651	size_t stack_size;
		652
		653	++cctx_count;
		654
		655	Newz (0, cctx, 1, coro_cctx);
		656
		657	#if HAVE_MMAP
		658
		659	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		660	/* mmap supposedly does allocate-on-write for us */
		661	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		662
		663	if (cctx->sptr != (void *)-1)
		664	{
		665	# if CORO_STACKGUARD
		666	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		667	# endif
		668	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		669	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		670	cctx->mapped = 1;
603	}	671	}
604	else	672	else
605	{	673	#endif
606	UNOP myop;
607
608	PL_op = (OP *)&myop;
609
610	Zero(&myop, 1, UNOP);
611	myop.op_next = Nullop;
612	myop.op_flags = OPf_WANT_VOID;
613
614	PUSHMARK(SP);
615	XPUSHs (sub_init);
616	/*
617	* the next line is slightly wrong, as PL_op->op_next
618	* is actually being executed so we skip the first op.
619	* that doesn't matter, though, since it is only
620	* pp_nextstate and we never return...
621	* ah yes, and I don't care anyways ;)
622	*/
623	PUTBACK;
624	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
625	SPAGAIN;
626
627	ENTER; /* necessary e.g. for dounwind */
628	}	674	{
629	}	675	cctx->ssize = coro_stacksize * (long)sizeof (long);
		676	New (0, cctx->sptr, coro_stacksize, long);
630		677
631	static void	678	if (!cctx->sptr)
632	continue_coro (void *arg)	679	{
633	{	680	perror ("FATAL: unable to allocate stack for coroutine");
634	/*	681	_exit (EXIT_FAILURE);
635	* this is a _very_ stripped down perl interpreter ;)	682	}
636	*/
637	dTHX;
638	Coro__State ctx = (Coro__State)arg;
639		683
640	PL_top_env = &ctx->start_env;	684	stack_start = cctx->sptr;
		685	stack_size = cctx->ssize;
		686	}
641		687
642	ctx->cursp = 0;	688	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		689	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		690
		691	return cctx;
		692	}
		693
		694	static void
		695	cctx_destroy (coro_cctx *cctx)
		696	{
		697	if (!cctx)
		698	return;
		699
		700	--cctx_count;
		701
		702	#if CORO_USE_VALGRIND
		703	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		704	#endif
		705
		706	#if HAVE_MMAP
		707	if (cctx->mapped)
		708	munmap (cctx->sptr, cctx->ssize);
		709	else
		710	#endif
		711	Safefree (cctx->sptr);
		712
		713	Safefree (cctx);
		714	}
		715
		716	static coro_cctx *
		717	cctx_get (pTHX)
		718	{
		719	while (cctx_first)
		720	{
		721	coro_cctx *cctx = cctx_first;
		722	cctx_first = cctx->next;
		723	--cctx_idle;
		724
		725	if (cctx->ssize >= coro_stacksize)
		726	return cctx;
		727
		728	cctx_destroy (cctx);
		729	}
		730
643	PL_op = PL_op->op_next;	731	PL_op = PL_op->op_next;
644	CALLRUNOPS(aTHX);	732	return cctx_new ();
645
646	abort ();
647	}	733	}
648		734
649	static void	735	static void
		736	cctx_put (coro_cctx *cctx)
		737	{
		738	/* free another cctx if overlimit */
		739	if (cctx_idle >= MAX_IDLE_CCTX)
		740	{
		741	coro_cctx *first = cctx_first;
		742	cctx_first = first->next;
		743	--cctx_idle;
		744
		745	assert (!first->inuse);
		746	cctx_destroy (first);
		747	}
		748
		749	++cctx_idle;
		750	cctx->next = cctx_first;
		751	cctx_first = cctx;
		752	}
		753
		754	/** coroutine switching *****************************************************/
		755
		756	/* never call directly, always through the coro_state_transfer global variable */
		757	static void NOINLINE
650	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	758	transfer (pTHX_ struct coro *prev, struct coro *next)
651	{	759	{
652	dSTACKLEVEL;	760	dSTACKLEVEL;
653		761
		762	/* sometimes transfer is only called to set idle_sp */
		763	if (!next)
		764	{
		765	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		766	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		767	}
654	if (prev != next)	768	else if (prev != next)
655	{	769	{
656	if (next->mainstack)	770	coro_cctx *prev__cctx;
		771
		772	if (prev->flags & CF_NEW)
657	{	773	{
658	LOCK;	774	/* create a new empty context */
659	SAVE (prev, flags);	775	Newz (0, prev->cctx, 1, coro_cctx);
660	LOAD (next);	776	prev->cctx->inuse = 1;
661	UNLOCK;	777	prev->flags &= ~CF_NEW;
662		778	prev->flags |= CF_RUNNING;
663	/* mark this state as in-use */
664	next->mainstack = 0;
665	next->tmps_ix = -2;
666
667	/* stacklevel changed? if yes, grab the stack for us! */
668	if (flags & TRANSFER_SAVE_CCTXT)
669	{
670	if (!prev->stack)
671	allocate_stack (prev, 0);
672	else if (prev->cursp != stacklevel
673	&& prev->stack->usecnt > 1)
674	{
675	prev->gencnt = ++prev->stack->gencnt;
676	prev->stack->usecnt = 1;
677	}
678
679	/* has our stack been invalidated? */
680	if (next->stack && next->stack->gencnt != next->gencnt)
681	{
682	deallocate_stack (next);
683	allocate_stack (next, 1);
684	coro_create (&(next->stack->cctx),
685	continue_coro, (void *)next,
686	next->stack->sptr, labs (next->stack->ssize));
687	}
688
689	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
690	prev->cursp = stacklevel;
691	/* don't add any code here */
692	}
693	else
694	next->cursp = stacklevel;
695	}	779	}
696	else if (next->tmps_ix == -2)	780
697	croak ("tried to transfer to running coroutine");	781	/*TODO: must not croak here */
		782	if (!prev->flags & CF_RUNNING)
		783	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		784
		785	if (next->flags & CF_RUNNING)
		786	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		787
		788	if (next->flags & CF_DESTROYED)
		789	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		790
		791	prev->flags &= ~CF_RUNNING;
		792	next->flags |= CF_RUNNING;
		793
		794	LOCK;
		795
		796	if (next->flags & CF_NEW)
		797	{
		798	/* need to start coroutine */
		799	next->flags &= ~CF_NEW;
		800	/* first get rid of the old state */
		801	save_perl (aTHX_ prev);
		802	/* setup coroutine call */
		803	setup_coro (aTHX_ next);
		804	/* need a new stack */
		805	assert (!next->cctx);
		806	}
698	else	807	else
699	{	808	{
700	LOCK;	809	/* coroutine already started */
701	SAVE (prev, -1); /* first get rid of the old state */	810	save_perl (aTHX_ prev);
702	UNLOCK;	811	load_perl (aTHX_ next);
703
704	if (flags & TRANSFER_SAVE_CCTXT)
705	{
706	if (!prev->stack)
707	allocate_stack (prev, 0);
708
709	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
710	{
711	PL_top_env = &next->start_env;
712
713	setup_coro (next);
714	next->cursp = stacklevel;
715
716	prev->stack->refcnt++;
717	prev->stack->usecnt++;
718	next->stack = prev->stack;
719	next->gencnt = prev->gencnt;
720	}
721	else
722	{
723	assert (!next->stack);
724	allocate_stack (next, 1);
725	coro_create (&(next->stack->cctx),
726	setup_coro, (void *)next,
727	next->stack->sptr, labs (next->stack->ssize));
728	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
729	prev->cursp = stacklevel;
730	/* don't add any code here */
731	}
732	}
733	else
734	{
735	setup_coro (next);
736	next->cursp = stacklevel;
737	}
738	}	812	}
739	}
740		813
741	LOCK;	814	prev__cctx = prev->cctx;
742	if (coro_mortal)	815
743	{	816	/* possibly "free" the cctx */
744	SvREFCNT_dec (coro_mortal);	817	if (prev__cctx->idle_sp == STACKLEVEL)
745	coro_mortal = 0;	818	{
746	}	819	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		820	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		821
		822	prev->cctx = 0;
		823
		824	cctx_put (prev__cctx);
		825	prev__cctx->inuse = 0;
		826	}
		827
		828	if (!next->cctx)
		829	{
		830	next->cctx = cctx_get (aTHX);
		831	assert (!next->cctx->inuse);
		832	next->cctx->inuse = 1;
		833	}
		834
		835	if (prev__cctx != next->cctx)
		836	{
		837	prev__cctx->top_env = PL_top_env;
		838	PL_top_env = next->cctx->top_env;
		839	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		840	}
		841
		842	free_coro_mortal (aTHX);
747	UNLOCK;	843	UNLOCK;
		844	}
748	}	845	}
749		846
750	#define SV_CORO(sv,func) \	847	struct transfer_args
751	do { \	848	{
752	if (SvROK (sv)) \	849	struct coro *prev, *next;
753	sv = SvRV (sv); \	850	};
754	\
755	if (SvTYPE (sv) == SVt_PVHV) \
756	{ \
757	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
758	\
759	if (!he) \
760	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
761	\
762	(sv) = SvRV (HeVAL(he)); \
763	} \
764	\
765	/* must also be changed inside Coro::Cont::yield */ \
766	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
767	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
768	\
769	} while(0)
770		851
771	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	852	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
772		853
		854	/** high level stuff ********************************************************/
		855
773	static void	856	static int
		857	coro_state_destroy (pTHX_ struct coro *coro)
		858	{
		859	if (coro->flags & CF_DESTROYED)
		860	return 0;
		861
		862	coro->flags |= CF_DESTROYED;
		863
		864	if (coro->flags & CF_READY)
		865	{
		866	/* reduce nready, as destroying a ready coro effectively unreadies it */
		867	/* alternative: look through all ready queues and remove the coro */
		868	LOCK;
		869	--coro_nready;
		870	UNLOCK;
		871	}
		872	else
		873	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		874
		875	if (coro->mainstack && coro->mainstack != main_mainstack)
		876	{
		877	struct coro temp;
		878
		879	assert (!(coro->flags & CF_RUNNING));
		880
		881	Zero (&temp, 1, struct coro);
		882	temp.save = CORO_SAVE_DEF;
		883
		884	if (coro->flags & CF_RUNNING)
		885	croak ("FATAL: tried to destroy currently running coroutine");
		886
		887	save_perl (aTHX_ &temp);
		888	load_perl (aTHX_ coro);
		889
		890	coro_destroy_stacks (aTHX);
		891
		892	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		893
		894	coro->mainstack = 0;
		895	}
		896
		897	cctx_destroy (coro->cctx);
		898	SvREFCNT_dec (coro->args);
		899
		900	return 1;
		901	}
		902
		903	static int
		904	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		905	{
		906	struct coro *coro = (struct coro *)mg->mg_ptr;
		907	mg->mg_ptr = 0;
		908
		909	if (--coro->refcnt < 0)
		910	{
		911	coro_state_destroy (aTHX_ coro);
		912	Safefree (coro);
		913	}
		914
		915	return 0;
		916	}
		917
		918	static int
		919	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		920	{
		921	struct coro *coro = (struct coro *)mg->mg_ptr;
		922
		923	++coro->refcnt;
		924
		925	return 0;
		926	}
		927
		928	static MGVTBL coro_state_vtbl = {
		929	0, 0, 0, 0,
		930	coro_state_free,
		931	0,
		932	#ifdef MGf_DUP
		933	coro_state_dup,
		934	#else
		935	# define MGf_DUP 0
		936	#endif
		937	};
		938
		939	static struct coro *
		940	SvSTATE_ (pTHX_ SV *coro)
		941	{
		942	HV *stash;
		943	MAGIC *mg;
		944
		945	if (SvROK (coro))
		946	coro = SvRV (coro);
		947
		948	stash = SvSTASH (coro);
		949	if (stash != coro_stash && stash != coro_state_stash)
		950	{
		951	/* very slow, but rare, check */
		952	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		953	croak ("Coro::State object required");
		954	}
		955
		956	mg = CORO_MAGIC (coro);
		957	return (struct coro *)mg->mg_ptr;
		958	}
		959
		960	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		961
		962	static void
		963	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		964	{
		965	ta->prev = SvSTATE (prev_sv);
		966	ta->next = SvSTATE (next_sv);
		967	}
		968
		969	static void
774	api_transfer(pTHX_ SV *prev, SV *next, int flags)	970	api_transfer (SV *prev_sv, SV *next_sv)
775	{	971	{
776	SV_CORO (prev, "Coro::transfer");	972	dTHX;
777	SV_CORO (next, "Coro::transfer");	973	struct transfer_args ta;
778		974
779	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	975	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		976	TRANSFER (ta);
		977	}
		978
		979	static int
		980	api_save (SV *coro_sv, int new_save)
		981	{
		982	dTHX;
		983	struct coro *coro = SvSTATE (coro_sv);
		984	int old_save = coro->save;
		985
		986	if (new_save >= 0)
		987	coro->save = new_save;
		988
		989	return old_save;
780	}	990	}
781		991
782	/** Coro ********************************************************************/	992	/** Coro ********************************************************************/
783		993
784	#define PRIO_MAX 3
785	#define PRIO_HIGH 1
786	#define PRIO_NORMAL 0
787	#define PRIO_LOW -1
788	#define PRIO_IDLE -3
789	#define PRIO_MIN -4
790
791	/* for Coro.pm */
792	static GV *coro_current, *coro_idle;
793	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
794	static int coro_nready;
795
796	static void	994	static void
797	coro_enq (pTHX_ SV *sv)	995	coro_enq (pTHX_ SV *coro_sv)
798	{	996	{
799	SV **xprio;
800	int prio;
801
802	if (SvTYPE (sv) != SVt_PVHV)
803	croak ("Coro::ready tried to enqueue something that is not a coroutine");
804
805	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
806	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
807
808	prio = prio > PRIO_MAX ? PRIO_MAX
809	: prio < PRIO_MIN ? PRIO_MIN
810	: prio;
811
812	av_push (coro_ready [prio - PRIO_MIN], sv);	997	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
813	coro_nready++;
814	}	998	}
815		999
816	static SV *	1000	static SV *
817	coro_deq (pTHX_ int min_prio)	1001	coro_deq (pTHX_ int min_prio)
818	{	1002	{
…		…
821	min_prio -= PRIO_MIN;	1005	min_prio -= PRIO_MIN;
822	if (min_prio < 0)	1006	if (min_prio < 0)
823	min_prio = 0;	1007	min_prio = 0;
824		1008
825	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1009	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
826	if (av_len (coro_ready[prio]) >= 0)	1010	if (AvFILLp (coro_ready [prio]) >= 0)
827	{
828	coro_nready--;
829	return av_shift (coro_ready[prio]);	1011	return av_shift (coro_ready [prio]);
830	}
831		1012
832	return 0;	1013	return 0;
833	}	1014	}
834		1015
835	static void	1016	static int
836	api_ready (SV *coro)	1017	api_ready (SV *coro_sv)
837	{	1018	{
838	dTHX;	1019	dTHX;
		1020	struct coro *coro;
839		1021
840	if (SvROK (coro))	1022	if (SvROK (coro_sv))
841	coro = SvRV (coro);	1023	coro_sv = SvRV (coro_sv);
		1024
		1025	coro = SvSTATE (coro_sv);
		1026
		1027	if (coro->flags & CF_READY)
		1028	return 0;
		1029
		1030	coro->flags |= CF_READY;
842		1031
843	LOCK;	1032	LOCK;
844	coro_enq (aTHX_ SvREFCNT_inc (coro));	1033	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1034	++coro_nready;
845	UNLOCK;	1035	UNLOCK;
		1036
		1037	return 1;
		1038	}
		1039
		1040	static int
		1041	api_is_ready (SV *coro_sv)
		1042	{
		1043	dTHX;
		1044	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1045	}
		1046
		1047	static void
		1048	prepare_schedule (pTHX_ struct transfer_args *ta)
		1049	{
		1050	SV *prev_sv, *next_sv;
		1051
		1052	for (;;)
		1053	{
		1054	LOCK;
		1055	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1056
		1057	/* nothing to schedule: call the idle handler */
		1058	if (!next_sv)
		1059	{
		1060	dSP;
		1061	UNLOCK;
		1062
		1063	ENTER;
		1064	SAVETMPS;
		1065
		1066	PUSHMARK (SP);
		1067	PUTBACK;
		1068	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1069
		1070	FREETMPS;
		1071	LEAVE;
		1072	continue;
		1073	}
		1074
		1075	ta->next = SvSTATE (next_sv);
		1076
		1077	/* cannot transfer to destroyed coros, skip and look for next */
		1078	if (ta->next->flags & CF_DESTROYED)
		1079	{
		1080	UNLOCK;
		1081	SvREFCNT_dec (next_sv);
		1082	/* coro_nready is already taken care of by destroy */
		1083	continue;
		1084	}
		1085
		1086	--coro_nready;
		1087	UNLOCK;
		1088	break;
		1089	}
		1090
		1091	/* free this only after the transfer */
		1092	prev_sv = SvRV (coro_current);
		1093	SvRV_set (coro_current, next_sv);
		1094	ta->prev = SvSTATE (prev_sv);
		1095
		1096	assert (ta->next->flags & CF_READY);
		1097	ta->next->flags &= ~CF_READY;
		1098
		1099	LOCK;
		1100	free_coro_mortal (aTHX);
		1101	coro_mortal = prev_sv;
		1102	UNLOCK;
		1103	}
		1104
		1105	static void
		1106	prepare_cede (pTHX_ struct transfer_args *ta)
		1107	{
		1108	api_ready (coro_current);
		1109	prepare_schedule (aTHX_ ta);
		1110	}
		1111
		1112	static int
		1113	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1114	{
		1115	if (coro_nready)
		1116	{
		1117	SV *prev = SvRV (coro_current);
		1118	prepare_schedule (aTHX_ ta);
		1119	api_ready (prev);
		1120	return 1;
		1121	}
		1122	else
		1123	return 0;
846	}	1124	}
847		1125
848	static void	1126	static void
849	api_schedule (void)	1127	api_schedule (void)
850	{	1128	{
851	dTHX;	1129	dTHX;
		1130	struct transfer_args ta;
852		1131
853	SV *prev, *next;	1132	prepare_schedule (aTHX_ &ta);
854		1133	TRANSFER (ta);
855	LOCK;
856
857	prev = SvRV (GvSV (coro_current));
858	next = coro_deq (aTHX_ PRIO_MIN);
859
860	if (!next)
861	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
862
863	/* free this only after the transfer */
864	coro_mortal = prev;
865	SV_CORO (prev, "Coro::schedule");
866
867	SvRV (GvSV (coro_current)) = next;
868
869	SV_CORO (next, "Coro::schedule");
870
871	UNLOCK;
872
873	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
874	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
875	}	1134	}
876		1135
877	static void	1136	static int
878	api_cede (void)	1137	api_cede (void)
879	{	1138	{
880	dTHX;	1139	dTHX;
		1140	struct transfer_args ta;
881		1141
882	LOCK;	1142	prepare_cede (aTHX_ &ta);
883	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
884	UNLOCK;
885		1143
886	api_schedule ();	1144	if (ta.prev != ta.next)
		1145	{
		1146	TRANSFER (ta);
		1147	return 1;
		1148	}
		1149	else
		1150	return 0;
		1151	}
		1152
		1153	static int
		1154	api_cede_notself (void)
		1155	{
		1156	dTHX;
		1157	struct transfer_args ta;
		1158
		1159	if (prepare_cede_notself (aTHX_ &ta))
		1160	{
		1161	TRANSFER (ta);
		1162	return 1;
		1163	}
		1164	else
		1165	return 0;
887	}	1166	}
888		1167
889	MODULE = Coro::State PACKAGE = Coro::State	1168	MODULE = Coro::State PACKAGE = Coro::State
890		1169
891	PROTOTYPES: ENABLE	1170	PROTOTYPES: DISABLE
892		1171
893	BOOT:	1172	BOOT:
894	{ /* {} necessary for stoopid perl-5.6.x */	1173	{
895	#ifdef USE_ITHREADS	1174	#ifdef USE_ITHREADS
896	MUTEX_INIT (&coro_mutex);	1175	MUTEX_INIT (&coro_mutex);
897	#endif	1176	#endif
		1177	BOOT_PAGESIZE;
898		1178
899	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
900	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
901	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1179	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
902		1180
903	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1181	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
904	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1182	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
905	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1183	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1184	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1185	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
906	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1186	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1187	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
907		1188
908	main_mainstack = PL_mainstack;	1189	main_mainstack = PL_mainstack;
		1190	main_top_env = PL_top_env;
		1191
		1192	while (main_top_env->je_prev)
		1193	main_top_env = main_top_env->je_prev;
909		1194
910	coroapi.ver = CORO_API_VERSION;	1195	coroapi.ver = CORO_API_VERSION;
911	coroapi.transfer = api_transfer;	1196	coroapi.transfer = api_transfer;
912	}
913		1197
914	Coro::State	1198	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
915	_newprocess(args)	1199	}
916	SV * args	1200
917	PROTOTYPE: $	1201	SV *
		1202	new (char *klass, ...)
918	CODE:	1203	CODE:
919	Coro__State coro;	1204	{
		1205	struct coro *coro;
		1206	HV *hv;
		1207	int i;
920		1208
921	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
922	croak ("Coro::State::_newprocess expects an arrayref");
923
924	Newz (0, coro, 1, struct coro);	1209	Newz (0, coro, 1, struct coro);
		1210	coro->args = newAV ();
		1211	coro->save = CORO_SAVE_DEF;
		1212	coro->flags = CF_NEW;
925		1213
926	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1214	hv = newHV ();
927	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1215	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
928	/*coro->stack = 0;*/	1216	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
929		1217
930	/* same as JMPENV_BOOTSTRAP */	1218	for (i = 1; i < items; i++)
931	/* we might be able to recycle start_env, but safe is safe */	1219	av_push (coro->args, newSVsv (ST (i)));
932	/*Zero(&coro->start_env, 1, JMPENV);*/	1220	}
933	coro->start_env.je_ret = -1;
934	coro->start_env.je_mustcatch = TRUE;
935
936	RETVAL = coro;
937	OUTPUT:	1221	OUTPUT:
938	RETVAL	1222	RETVAL
939		1223
		1224	int
		1225	save (SV *coro, int new_save = -1)
		1226	CODE:
		1227	RETVAL = api_save (coro, new_save);
		1228	OUTPUT:
		1229	RETVAL
		1230
		1231	int
		1232	save_also (SV *coro_sv, int save_also)
		1233	CODE:
		1234	{
		1235	struct coro *coro = SvSTATE (coro_sv);
		1236	RETVAL = coro->save;
		1237	coro->save |= save_also;
		1238	}
		1239	OUTPUT:
		1240	RETVAL
		1241
940	void	1242	void
941	transfer(prev, next, flags)	1243	_set_stacklevel (...)
942	SV *prev	1244	ALIAS:
943	SV *next	1245	Coro::State::transfer = 1
944	int flags	1246	Coro::schedule = 2
945	PROTOTYPE: @	1247	Coro::cede = 3
		1248	Coro::cede_notself = 4
946	CODE:	1249	CODE:
947	PUTBACK;	1250	{
948	SV_CORO (next, "Coro::transfer");	1251	struct transfer_args ta;
949	SV_CORO (prev, "Coro::transfer");	1252
950	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1253	switch (ix)
951	SPAGAIN;	1254	{
		1255	case 0:
		1256	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1257	ta.next = 0;
		1258	break;
		1259
		1260	case 1:
		1261	if (items != 2)
		1262	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1263
		1264	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1265	break;
		1266
		1267	case 2:
		1268	prepare_schedule (aTHX_ &ta);
		1269	break;
		1270
		1271	case 3:
		1272	prepare_cede (aTHX_ &ta);
		1273	break;
		1274
		1275	case 4:
		1276	if (!prepare_cede_notself (aTHX_ &ta))
		1277	XSRETURN_EMPTY;
		1278
		1279	break;
		1280	}
		1281
		1282	BARRIER;
		1283	TRANSFER (ta);
		1284
		1285	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1286	XSRETURN_YES;
		1287	}
		1288
		1289	bool
		1290	_destroy (SV *coro_sv)
		1291	CODE:
		1292	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1293	OUTPUT:
		1294	RETVAL
952		1295
953	void	1296	void
954	DESTROY(coro)
955	Coro::State coro
956	CODE:
957
958	if (coro->mainstack && coro->mainstack != main_mainstack)
959	{
960	struct coro temp;
961
962	PUTBACK;
963	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
964	LOAD (aTHX_ coro);
965	SPAGAIN;
966
967	destroy_stacks (aTHX);
968
969	LOAD ((&temp)); /* this will get rid of defsv etc.. */
970	SPAGAIN;
971
972	coro->mainstack = 0;
973	}
974
975	deallocate_stack (coro);
976	SvREFCNT_dec (coro->args);
977	Safefree (coro);
978
979	void
980	_exit(code)	1297	_exit (code)
981	int code	1298	int code
982	PROTOTYPE: $	1299	PROTOTYPE: $
983	CODE:	1300	CODE:
984	_exit (code);	1301	_exit (code);
985		1302
986	MODULE = Coro::State PACKAGE = Coro::Cont	1303	int
		1304	cctx_stacksize (int new_stacksize = 0)
		1305	CODE:
		1306	RETVAL = coro_stacksize;
		1307	if (new_stacksize)
		1308	coro_stacksize = new_stacksize;
		1309	OUTPUT:
		1310	RETVAL
987		1311
988	# this is slightly dirty (should expose a c-level api)	1312	int
		1313	cctx_count ()
		1314	CODE:
		1315	RETVAL = cctx_count;
		1316	OUTPUT:
		1317	RETVAL
989		1318
990	void	1319	int
991	yield(...)	1320	cctx_idle ()
992	PROTOTYPE: @	1321	CODE:
993	CODE:	1322	RETVAL = cctx_idle;
994	SV *yieldstack;	1323	OUTPUT:
995	SV *sv;	1324	RETVAL
996	AV *defav = GvAV (PL_defgv);
997	struct coro *prev, *next;
998
999	yieldstack = *hv_fetch (
1000	(HV *)SvRV (GvSV (coro_current)),
1001	"yieldstack", sizeof ("yieldstack") - 1,
1002	0
1003	);
1004
1005	/* set up @_ -- ugly */
1006	av_clear (defav);
1007	av_fill (defav, items - 1);
1008	while (items--)
1009	av_store (defav, items, SvREFCNT_inc (ST(items)));
1010
1011	sv = av_pop ((AV *)SvRV (yieldstack));
1012	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1013	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1014	SvREFCNT_dec (sv);
1015
1016	transfer (aTHX_ prev, next, 0);
1017		1325
1018	MODULE = Coro::State PACKAGE = Coro	1326	MODULE = Coro::State PACKAGE = Coro
1019		1327
1020	# this is slightly dirty (should expose a c-level api)
1021
1022	BOOT:	1328	BOOT:
1023	{	1329	{
1024	int i;	1330	int i;
		1331
1025	HV *stash = gv_stashpv ("Coro", TRUE);	1332	coro_stash = gv_stashpv ("Coro", TRUE);
1026		1333
1027	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1334	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1028	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1335	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1029	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1336	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1030	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1337	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1031	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1338	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1032	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1339	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1033		1340
1034	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1341	coro_current = get_sv ("Coro::current", FALSE);
1035	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1342	SvREADONLY_on (coro_current);
1036		1343
1037	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1344	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1038	coro_ready[i] = newAV ();	1345	coro_ready[i] = newAV ();
1039		1346
1040	{	1347	{
1041	SV *sv = perl_get_sv("Coro::API", 1);	1348	SV *sv = perl_get_sv("Coro::API", 1);
1042		1349
1043	coroapi.schedule = api_schedule;	1350	coroapi.schedule = api_schedule;
		1351	coroapi.save = api_save;
1044	coroapi.cede = api_cede;	1352	coroapi.cede = api_cede;
		1353	coroapi.cede_notself = api_cede_notself;
1045	coroapi.ready = api_ready;	1354	coroapi.ready = api_ready;
		1355	coroapi.is_ready = api_is_ready;
1046	coroapi.nready = &coro_nready;	1356	coroapi.nready = &coro_nready;
1047	coroapi.current = coro_current;	1357	coroapi.current = coro_current;
1048		1358
1049	GCoroAPI = &coroapi;	1359	GCoroAPI = &coroapi;
1050	sv_setiv(sv, (IV)&coroapi);	1360	sv_setiv (sv, (IV)&coroapi);
1051	SvREADONLY_on(sv);	1361	SvREADONLY_on (sv);
1052	}	1362	}
1053	}	1363	}
1054		1364
1055	#if !PERL_MICRO
1056
1057	void	1365	void
1058	ready(self)	1366	_set_current (SV *current)
1059	SV * self
1060	PROTOTYPE: $	1367	PROTOTYPE: $
1061	CODE:	1368	CODE:
1062	api_ready (self);	1369	SvREFCNT_dec (SvRV (coro_current));
1063		1370	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1064	#endif
1065		1371
1066	int	1372	int
		1373	prio (Coro::State coro, int newprio = 0)
		1374	ALIAS:
		1375	nice = 1
		1376	CODE:
		1377	{
		1378	RETVAL = coro->prio;
		1379
		1380	if (items > 1)
		1381	{
		1382	if (ix)
		1383	newprio = coro->prio - newprio;
		1384
		1385	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1386	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1387
		1388	coro->prio = newprio;
		1389	}
		1390	}
		1391	OUTPUT:
		1392	RETVAL
		1393
		1394	SV *
		1395	ready (SV *self)
		1396	PROTOTYPE: $
		1397	CODE:
		1398	RETVAL = boolSV (api_ready (self));
		1399	OUTPUT:
		1400	RETVAL
		1401
		1402	SV *
		1403	is_ready (SV *self)
		1404	PROTOTYPE: $
		1405	CODE:
		1406	RETVAL = boolSV (api_is_ready (self));
		1407	OUTPUT:
		1408	RETVAL
		1409
		1410	int
1067	nready(...)	1411	nready (...)
1068	PROTOTYPE:	1412	PROTOTYPE:
1069	CODE:	1413	CODE:
1070	RETVAL = coro_nready;	1414	RETVAL = coro_nready;
1071	OUTPUT:	1415	OUTPUT:
1072	RETVAL	1416	RETVAL
1073		1417
1074	void	1418	MODULE = Coro::State PACKAGE = Coro::AIO
1075	schedule(...)	1419
1076	PROTOTYPE:	1420	SV *
		1421	_get_state ()
1077	CODE:	1422	CODE:
1078	api_schedule ();
1079
1080	void
1081	cede(...)
1082	PROTOTYPE:
1083	CODE:
1084	api_cede ();
1085
1086	# and these are hacks
1087	SV *
1088	_aio_get_state ()
1089	CODE:
1090	{	1423	{
1091	struct {	1424	struct io_state *data;
1092	int errorno;
1093	int laststype;
1094	int laststatval;
1095	Stat_t statcache;
1096	} data;
1097		1425
		1426	RETVAL = newSV (sizeof (struct io_state));
		1427	data = (struct io_state *)SvPVX (RETVAL);
		1428	SvCUR_set (RETVAL, sizeof (struct io_state));
		1429	SvPOK_only (RETVAL);
		1430
1098	data.errorno = errno;	1431	data->errorno = errno;
1099	data.laststype = PL_laststype;	1432	data->laststype = PL_laststype;
1100	data.laststatval = PL_laststatval;	1433	data->laststatval = PL_laststatval;
1101	data.statcache = PL_statcache;	1434	data->statcache = PL_statcache;
1102
1103	RETVAL = newSVpvn ((char *)&data, sizeof data);
1104	}	1435	}
1105	OUTPUT:	1436	OUTPUT:
1106	RETVAL	1437	RETVAL
1107		1438
1108	void	1439	void
1109	_aio_set_state (char *data_)	1440	_set_state (char *data_)
1110	PROTOTYPE: $	1441	PROTOTYPE: $
1111	CODE:	1442	CODE:
1112	{	1443	{
1113	struct {	1444	struct io_state *data = (void *)data_;
1114	int errorno;
1115	int laststype;
1116	int laststatval;
1117	Stat_t statcache;
1118	} *data = (void *)data_;
1119		1445
1120	errno = data->errorno;	1446	errno = data->errorno;
1121	PL_laststype = data->laststype;	1447	PL_laststype = data->laststype;
1122	PL_laststatval = data->laststatval;	1448	PL_laststatval = data->laststatval;
1123	PL_statcache = data->statcache;	1449	PL_statcache = data->statcache;
1124	}	1450	}
		1451

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