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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 1.158 by root, Fri Sep 21 02:23:48 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
61	#endif
62		87
63	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* prefer perl internal functions over our own? */
64	* to the current C stack pointer. Its property is that it changes with each call	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
65	* and should be unique. */	90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
		93	/* The next macros try to return the current stack pointer, in an as
		94	* portable way as possible. */
66	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	96	#define STACKLEVEL ((void *)&stacklevel)
68		97
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		99
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	100	#if __GNUC__ >= 3
		101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		103	#else
		104	# define attribute(x)
		105	# define BARRIER
		106	#endif
		107
		108	#define NOINLINE attribute ((noinline))
72		109
73	#include "CoroAPI.h"	110	#include "CoroAPI.h"
74
75	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
76		111
77	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
78	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
79	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
80	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
81	#else	116	#else
82	# define LOCK (void)0	117	# define LOCK (void)0
83	# define UNLOCK (void)0	118	# define UNLOCK (void)0
84	#endif	119	#endif
85		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
86	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
87	static AV *main_mainstack; /* used to differentiate between $main and others */	132	static AV *main_mainstack; /* used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
88	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
89	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
90		136
		137	static struct coro_cctx *cctx_first;
		138	static int cctx_count, cctx_idle;
		139
91	/* this is a structure representing a c-level coroutine */	140	/* this is a structure representing a c-level coroutine */
92	typedef struct coro_stack {	141	typedef struct coro_cctx {
93	struct coro_stack *next;	142	struct coro_cctx *next;
94		143
95	void *idle_sp; /* original stacklevel when coroutine was created */	144	/* the stack */
96	void *sptr;	145	void *sptr;
97	long ssize; /* positive == mmap, otherwise malloc */	146	size_t ssize;
98		147
99	/* cpu state */	148	/* cpu state */
		149	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		150	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		151	JMPENV *top_env;
100	coro_context cctx;	152	coro_context cctx;
101	JMPENV *top_env;
102	} coro_stack;
103		153
104	/* the (fake) coro_stack representing the main program */	154	#if CORO_USE_VALGRIND
105	static coro_stack *main_stack;	155	int valgrind_id;
		156	#endif
		157	char inuse, mapped;
		158	} coro_cctx;
		159
		160	enum {
		161	CF_RUNNING = 0x0001, /* coroutine is running */
		162	CF_READY = 0x0002, /* coroutine is ready */
		163	CF_NEW = 0x0004, /* has never been switched to */
		164	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		165	};
106		166
107	/* this is a structure representing a perl-level coroutine */	167	/* this is a structure representing a perl-level coroutine */
108	struct coro {	168	struct coro {
109	/* the c coroutine allocated to this perl coroutine, if any */	169	/* the c coroutine allocated to this perl coroutine, if any */
110	coro_stack *stack;	170	coro_cctx *cctx;
111		171
112	/* data associated with this coroutine (initial args) */	172	/* data associated with this coroutine (initial args) */
113	AV *args;	173	AV *args;
114	int refcnt;	174	int refcnt;
		175	int save; /* CORO_SAVE flags */
		176	int flags; /* CF_ flags */
115		177
116	/* optionally saved, might be zero */	178	/* optionally saved, might be zero */
117	AV *defav;	179	AV *defav; /* @_ */
118	SV *defsv;	180	SV *defsv; /* $_ */
119	SV *errsv;	181	SV *errsv; /* $@ */
		182	GV *deffh; /* default filehandle */
		183	SV *irssv; /* $/ */
		184	SV *irssv_sv; /* real $/ cache */
120		185
121	/* saved global state not related to stacks */	186	#define VAR(name,type) type name;
122	U8 dowarn;	187	# include "state.h"
123	I32 in_eval;	188	#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		189
155	/* coro process data */	190	/* coro process data */
156	int prio;	191	int prio;
		192
		193	/* linked list */
		194	struct coro *next, *prev;
		195	HV *hv; /* the perl hash associated with this coro, if any */
157	};	196	};
158		197
159	typedef struct coro *Coro__State;	198	typedef struct coro *Coro__State;
160	typedef struct coro *Coro__State_or_hashref;	199	typedef struct coro *Coro__State_or_hashref;
161		200
		201	/** Coro ********************************************************************/
		202
		203	#define PRIO_MAX 3
		204	#define PRIO_HIGH 1
		205	#define PRIO_NORMAL 0
		206	#define PRIO_LOW -1
		207	#define PRIO_IDLE -3
		208	#define PRIO_MIN -4
		209
		210	/* for Coro.pm */
		211	static SV *coro_current;
		212	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		213	static int coro_nready;
		214	static struct coro *coro_first;
		215
		216	/** lowlevel stuff **********************************************************/
		217
162	static AV *	218	static AV *
163	coro_clone_padlist (pTHX_ CV *cv)	219	coro_clone_padlist (pTHX_ CV *cv)
164	{	220	{
165	AV *padlist = CvPADLIST (cv);	221	AV *padlist = CvPADLIST (cv);
166	AV *newpadlist, *newpad;	222	AV *newpadlist, *newpad;
167		223
168	newpadlist = newAV ();	224	newpadlist = newAV ();
169	AvREAL_off (newpadlist);	225	AvREAL_off (newpadlist);
170	#if PERL_VERSION < 9	226	#if PERL_VERSION_ATLEAST (5,9,0)
		227	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		228	#else
171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	229	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
172	#else
173	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
174	#endif	230	#endif
175	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	231	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
176	--AvFILLp (padlist);	232	--AvFILLp (padlist);
177		233
178	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	234	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
222		278
223	#define PERL_MAGIC_coro PERL_MAGIC_ext	279	#define PERL_MAGIC_coro PERL_MAGIC_ext
224		280
225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	281	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
226		282
		283	#define CORO_MAGIC(cv) \
		284	SvMAGIC (cv) \
		285	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		286	? SvMAGIC (cv) \
		287	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		288	: 0
		289
227	/* the next two functions merely cache the padlists */	290	/* the next two functions merely cache the padlists */
228	static void	291	static void
229	get_padlist (pTHX_ CV *cv)	292	get_padlist (pTHX_ CV *cv)
230	{	293	{
231	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	294	MAGIC *mg = CORO_MAGIC (cv);
		295	AV *av;
232		296
233	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	297	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
234	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	298	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
235	else	299	else
236	{	300	{
237	#if 0	301	#if CORO_PREFER_PERL_FUNCTIONS
238	/* this should work - but it doesn't :( */	302	/* this is probably cleaner, but also slower? */
239	CV *cp = Perl_cv_clone (aTHX_ cv);	303	CV *cp = Perl_cv_clone (cv);
240	CvPADLIST (cv) = CvPADLIST (cp);	304	CvPADLIST (cv) = CvPADLIST (cp);
241	CvPADLIST (cp) = 0;	305	CvPADLIST (cp) = 0;
242	SvREFCNT_dec (cp);	306	SvREFCNT_dec (cp);
243	#else	307	#else
244	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	308	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
247	}	311	}
248		312
249	static void	313	static void
250	put_padlist (pTHX_ CV *cv)	314	put_padlist (pTHX_ CV *cv)
251	{	315	{
252	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	316	MAGIC *mg = CORO_MAGIC (cv);
		317	AV *av;
253		318
254	if (!mg)	319	if (!mg)
255	{	320	{
256	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	321	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
257	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	322	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
258	mg->mg_virtual = &vtbl_coro;	323	mg->mg_virtual = &vtbl_coro;
259	mg->mg_obj = (SV *)newAV ();	324	mg->mg_obj = (SV *)newAV ();
260	}	325	}
261		326
262	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	327	av = (AV *)mg->mg_obj;
		328
		329	if (AvFILLp (av) >= AvMAX (av))
		330	av_extend (av, AvMAX (av) + 1);
		331
		332	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
263	}	333	}
		334
		335	/** load & save, init *******************************************************/
264		336
265	#define SB do {	337	#define SB do {
266	#define SE } while (0)	338	#define SE } while (0)
267		339
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	340	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
272		341
273	static void	342	static void
274	load_state(pTHX_ Coro__State c)	343	load_perl (pTHX_ Coro__State c)
275	{	344	{
276	PL_dowarn = c->dowarn;	345	#define VAR(name,type) PL_ ## name = c->name;
277	PL_in_eval = c->in_eval;	346	# include "state.h"
278		347	#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		348
310	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	349	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
311	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	350	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
312	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	351	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		352	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		353
		354	if (c->irssv)
		355	{
		356	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		357	{
		358	SvREFCNT_dec (c->irssv);
		359	c->irssv = 0;
		360	}
		361	else
		362	{
		363	REPLACE_SV (PL_rs, c->irssv);
		364	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		365	sv_setsv (c->irssv_sv, PL_rs);
		366	}
		367	}
313		368
314	{	369	{
315	dSP;	370	dSP;
316	CV *cv;	371	CV *cv;
317		372
318	/* now do the ugly restore mess */	373	/* now do the ugly restore mess */
319	while ((cv = (CV *)POPs))	374	while ((cv = (CV *)POPs))
320	{	375	{
321	AV *padlist = (AV *)POPs;
322
323	if (padlist)
324	{
325	put_padlist (aTHX_ cv); /* mark this padlist as available */	376	put_padlist (aTHX_ cv); /* mark this padlist as available */
326	CvPADLIST(cv) = padlist;	377	CvDEPTH (cv) = PTR2IV (POPs);
327	}	378	CvPADLIST (cv) = (AV *)POPs;
328
329	++CvDEPTH(cv);
330	}	379	}
331		380
332	PUTBACK;	381	PUTBACK;
333	}	382	}
334	}	383	}
335		384
336	static void	385	static void
337	save_state(pTHX_ Coro__State c, int flags)	386	save_perl (pTHX_ Coro__State c)
338	{	387	{
339	{	388	{
340	dSP;	389	dSP;
341	I32 cxix = cxstack_ix;	390	I32 cxix = cxstack_ix;
342	PERL_CONTEXT *ccstk = cxstack;	391	PERL_CONTEXT *ccstk = cxstack;
…		…
345	/*	394	/*
346	* the worst thing you can imagine happens first - we have to save	395	* the worst thing you can imagine happens first - we have to save
347	* (and reinitialize) all cv's in the whole callchain :(	396	* (and reinitialize) all cv's in the whole callchain :(
348	*/	397	*/
349		398
350	PUSHs (Nullsv);	399	XPUSHs (Nullsv);
351	/* this loop was inspired by pp_caller */	400	/* this loop was inspired by pp_caller */
352	for (;;)	401	for (;;)
353	{	402	{
354	while (cxix >= 0)	403	while (cxix >= 0)
355	{	404	{
356	PERL_CONTEXT *cx = &ccstk[cxix--];	405	PERL_CONTEXT *cx = &ccstk[cxix--];
357		406
358	if (CxTYPE(cx) == CXt_SUB)	407	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
359	{	408	{
360	CV *cv = cx->blk_sub.cv;	409	CV *cv = cx->blk_sub.cv;
		410
361	if (CvDEPTH(cv))	411	if (CvDEPTH (cv))
362	{	412	{
363	EXTEND (SP, CvDEPTH(cv)*2);	413	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));	414	PUSHs ((SV *)CvPADLIST (cv));
		415	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
373	PUSHs ((SV *)cv);	416	PUSHs ((SV *)cv);
374		417
		418	CvDEPTH (cv) = 0;
375	get_padlist (aTHX_ cv);	419	get_padlist (aTHX_ cv);
376	}	420	}
377	}	421	}
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	}	422	}
387		423
388	if (top_si->si_type == PERLSI_MAIN)	424	if (top_si->si_type == PERLSI_MAIN)
389	break;	425	break;
390		426
391	top_si = top_si->si_prev;	427	top_si = top_si->si_prev;
392	ccstk = top_si->si_cxstack;	428	ccstk = top_si->si_cxstack;
393	cxix = top_si->si_cxix;	429	cxix = top_si->si_cxix;
394	}	430	}
395		431
396	PUTBACK;	432	PUTBACK;
397	}	433	}
398		434
399	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	435	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;	436	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
401	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	437	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		438	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		439	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
402		440
403	c->dowarn = PL_dowarn;	441	#define VAR(name,type)c->name = PL_ ## name;
404	c->in_eval = PL_in_eval;	442	# include "state.h"
405		443	#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	}	444	}
437		445
438	/*	446	/*
439	* allocate various perl stacks. This is an exact copy	447	* allocate various perl stacks. This is an exact copy
440	* of perl.c:init_stacks, except that it uses less memory	448	* of perl.c:init_stacks, except that it uses less memory
441	* on the (sometimes correct) assumption that coroutines do	449	* on the (sometimes correct) assumption that coroutines do
442	* not usually need a lot of stackspace.	450	* not usually need a lot of stackspace.
443	*/	451	*/
		452	#if CORO_PREFER_PERL_FUNCTIONS
		453	# define coro_init_stacks init_stacks
		454	#else
444	static void	455	static void
445	coro_init_stacks (pTHX)	456	coro_init_stacks (pTHX)
446	{	457	{
447	LOCK;	458	PL_curstackinfo = new_stackinfo(64, 6);
448
449	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
450	PL_curstackinfo->si_type = PERLSI_MAIN;	459	PL_curstackinfo->si_type = PERLSI_MAIN;
451	PL_curstack = PL_curstackinfo->si_stack;	460	PL_curstack = PL_curstackinfo->si_stack;
452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	461	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453		462
454	PL_stack_base = AvARRAY(PL_curstack);	463	PL_stack_base = AvARRAY(PL_curstack);
455	PL_stack_sp = PL_stack_base;	464	PL_stack_sp = PL_stack_base;
456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	465	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457		466
458	New(50,PL_tmps_stack,96,SV*);	467	New(50,PL_tmps_stack,64,SV*);
459	PL_tmps_floor = -1;	468	PL_tmps_floor = -1;
460	PL_tmps_ix = -1;	469	PL_tmps_ix = -1;
461	PL_tmps_max = 96;	470	PL_tmps_max = 64;
462		471
463	New(54,PL_markstack,16,I32);	472	New(54,PL_markstack,16,I32);
464	PL_markstack_ptr = PL_markstack;	473	PL_markstack_ptr = PL_markstack;
465	PL_markstack_max = PL_markstack + 16;	474	PL_markstack_max = PL_markstack + 16;
466		475
…		…
470		479
471	New(54,PL_scopestack,16,I32);	480	New(54,PL_scopestack,16,I32);
472	PL_scopestack_ix = 0;	481	PL_scopestack_ix = 0;
473	PL_scopestack_max = 16;	482	PL_scopestack_max = 16;
474		483
475	New(54,PL_savestack,96,ANY);	484	New(54,PL_savestack,64,ANY);
476	PL_savestack_ix = 0;	485	PL_savestack_ix = 0;
477	PL_savestack_max = 96;	486	PL_savestack_max = 64;
478		487
479	#if PERL_VERSION < 9	488	#if !PERL_VERSION_ATLEAST (5,9,0)
480	New(54,PL_retstack,8,OP*);	489	New(54,PL_retstack,4,OP*);
481	PL_retstack_ix = 0;	490	PL_retstack_ix = 0;
482	PL_retstack_max = 8;	491	PL_retstack_max = 4;
483	#endif	492	#endif
484
485	UNLOCK;
486	}	493	}
		494	#endif
487		495
488	/*	496	/*
489	* destroy the stacks, the callchain etc...	497	* destroy the stacks, the callchain etc...
490	*/	498	*/
491	static void	499	static void
492	destroy_stacks(pTHX)	500	coro_destroy_stacks (pTHX)
493	{	501	{
494	if (!IN_DESTRUCT)	502	if (!IN_DESTRUCT)
495	{	503	{
496	/* is this ugly, I ask? */	504	/* restore all saved variables and stuff */
497	LEAVE_SCOPE (0);	505	LEAVE_SCOPE (0);
		506	assert (PL_tmps_floor == -1);
498		507
499	/* sure it is, but more important: is it correct?? :/ */	508	/* free all temporaries */
500	FREETMPS;	509	FREETMPS;
		510	assert (PL_tmps_ix == -1);
501		511
		512	/* unwind all extra stacks */
502	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	513	POPSTACK_TO (PL_mainstack);
		514
		515	/* unwind main stack */
		516	dounwind (-1);
503	}	517	}
504		518
505	while (PL_curstackinfo->si_next)	519	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	520	PL_curstackinfo = PL_curstackinfo->si_next;
507		521
508	while (PL_curstackinfo)	522	while (PL_curstackinfo)
509	{	523	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	524	PERL_SI *p = PL_curstackinfo->si_prev;
511		525
512	{ /*D*//*remove*/
513	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */
516	}
517
518	if (!IN_DESTRUCT)	526	if (!IN_DESTRUCT)
519	{
520	dounwind (-1);/*D*//*remove*/
521	SvREFCNT_dec (PL_curstackinfo->si_stack);	527	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}
523		528
524	Safefree (PL_curstackinfo->si_cxstack);	529	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree (PL_curstackinfo);	530	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	531	PL_curstackinfo = p;
527	}	532	}
528		533
529	Safefree (PL_tmps_stack);	534	Safefree (PL_tmps_stack);
530	Safefree (PL_markstack);	535	Safefree (PL_markstack);
531	Safefree (PL_scopestack);	536	Safefree (PL_scopestack);
532	Safefree (PL_savestack);	537	Safefree (PL_savestack);
533	#if PERL_VERSION < 9	538	#if !PERL_VERSION_ATLEAST (5,9,0)
534	Safefree (PL_retstack);	539	Safefree (PL_retstack);
535	#endif	540	#endif
536	}	541	}
537		542
		543	static size_t
		544	coro_rss (struct coro *coro)
		545	{
		546	size_t rss = sizeof (coro);
		547
		548	if (coro->mainstack)
		549	{
		550	if (coro->flags & CF_RUNNING)
		551	{
		552	#define VAR(name,type)coro->name = PL_ ## name;
		553	# include "state.h"
		554	#undef VAR
		555	}
		556
		557	rss += sizeof (coro->curstackinfo);
		558	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		559	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		560	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		561	rss += coro->tmps_max * sizeof (SV *);
		562	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		563	rss += coro->scopestack_max * sizeof (I32);
		564	rss += coro->savestack_max * sizeof (ANY);
		565
		566	#if !PERL_VERSION_ATLEAST (5,9,0)
		567	rss += coro->retstack_max * sizeof (OP *);
		568	#endif
		569	}
		570
		571	return rss;
		572	}
		573
		574	/** coroutine stack handling ************************************************/
		575
538	static void	576	static void
539	setup_coro (struct coro *coro)	577	setup_coro (pTHX_ struct coro *coro)
540	{	578	{
541	/*	579	/*
542	* emulate part of the perl startup here.	580	* emulate part of the perl startup here.
543	*/	581	*/
544	dTHX;	582	coro_init_stacks (aTHX);
		583
		584	PL_curcop = &PL_compiling;
		585	PL_in_eval = EVAL_NULL;
		586	PL_comppad = 0;
		587	PL_curpm = 0;
		588	PL_localizing = 0;
		589	PL_dirty = 0;
		590	PL_restartop = 0;
		591
		592	{
		593	dSP;
		594	LOGOP myop;
		595
		596	SvREFCNT_dec (GvAV (PL_defgv));
		597	GvAV (PL_defgv) = coro->args; coro->args = 0;
		598
		599	Zero (&myop, 1, LOGOP);
		600	myop.op_next = Nullop;
		601	myop.op_flags = OPf_WANT_VOID;
		602
		603	PUSHMARK (SP);
		604	XPUSHs (av_shift (GvAV (PL_defgv)));
		605	PUTBACK;
		606	PL_op = (OP *)&myop;
		607	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		608	SPAGAIN;
		609	}
		610
		611	ENTER; /* necessary e.g. for dounwind */
		612	}
		613
		614	static void
		615	free_coro_mortal (pTHX)
		616	{
		617	if (coro_mortal)
		618	{
		619	SvREFCNT_dec (coro_mortal);
		620	coro_mortal = 0;
		621	}
		622	}
		623
		624	/* inject a fake call to Coro::State::_cctx_init into the execution */
		625	/* _cctx_init should be careful, as it could be called at almost any time */
		626	/* during execution of a perl program */
		627	static void NOINLINE
		628	prepare_cctx (pTHX_ coro_cctx *cctx)
		629	{
545	dSP;	630	dSP;
546	UNOP myop;	631	LOGOP myop;
547	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
548		632
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);	633	Zero (&myop, 1, LOGOP);
558	myop.op_next = Nullop;	634	myop.op_next = PL_op;
559	myop.op_flags = OPf_WANT_VOID;	635	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
560		636
		637	PUSHMARK (SP);
		638	EXTEND (SP, 2);
		639	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		640	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		641	PUTBACK;
561	PL_op = (OP *)&myop;	642	PL_op = (OP *)&myop;
562
563	PUSHMARK(SP);
564	XPUSHs (sub_init);
565	PUTBACK;
566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	643	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
567	SPAGAIN;	644	SPAGAIN;
568
569	ENTER; /* necessary e.g. for dounwind */
570	}	645	}
571		646
572	static void	647	/*
573	free_coro_mortal ()	648	* this is a _very_ stripped down perl interpreter ;)
574	{	649	*/
575	if (coro_mortal)
576	{
577	SvREFCNT_dec (coro_mortal);
578	coro_mortal = 0;
579	}
580	}
581
582	static void	650	static void
583	coro_run (void *arg)	651	coro_run (void *arg)
584	{	652	{
		653	dTHX;
		654
		655	/* coro_run is the alternative tail of transfer(), so unlock here. */
		656	UNLOCK;
		657
		658	PL_top_env = &PL_start_env;
		659
		660	/* inject a fake subroutine call to cctx_init */
		661	prepare_cctx (aTHX_ (coro_cctx *)arg);
		662
		663	/* somebody or something will hit me for both perl_run and PL_restartop */
		664	PL_restartop = PL_op;
		665	perl_run (PL_curinterp);
		666
585	/*	667	/*
586	* this is a _very_ stripped down perl interpreter ;)	668	* If perl-run returns we assume exit() was being called or the coro
		669	* fell off the end, which seems to be the only valid (non-bug)
		670	* reason for perl_run to return. We try to exit by jumping to the
		671	* bootstrap-time "top" top_env, as we cannot restore the "main"
		672	* coroutine as Coro has no such concept
587	*/	673	*/
588	dTHX;
589	PL_top_env = &PL_start_env;	674	PL_top_env = main_top_env;
590		675	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
591	UNLOCK;
592
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 */
598	perl_run (aTHX_ PERL_GET_CONTEXT);
599
600	abort ();
601	}	676	}
602		677
603	static coro_stack *	678	static coro_cctx *
604	stack_new ()	679	cctx_new ()
605	{	680	{
606	coro_stack *stack;	681	coro_cctx *cctx;
		682	void *stack_start;
		683	size_t stack_size;
607		684
		685	++cctx_count;
		686
608	New (0, stack, 1, coro_stack);	687	Newz (0, cctx, 1, coro_cctx);
609		688
610	#if HAVE_MMAP	689	#if HAVE_MMAP
611		690
612	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	691	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		692	/* 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);	693	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
614		694
615	if (stack->sptr == (void *)-1)	695	if (cctx->sptr != (void *)-1)
		696	{
		697	# if CORO_STACKGUARD
		698	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		699	# endif
		700	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		701	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		702	cctx->mapped = 1;
616	{	703	}
		704	else
		705	#endif
		706	{
		707	cctx->ssize = coro_stacksize * (long)sizeof (long);
		708	New (0, cctx->sptr, coro_stacksize, long);
		709
		710	if (!cctx->sptr)
		711	{
617	perror ("FATAL: unable to mmap stack for coroutine");	712	perror ("FATAL: unable to allocate stack for coroutine");
618	_exit (EXIT_FAILURE);	713	_exit (EXIT_FAILURE);
619	}	714	}
620		715
621	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	716	stack_start = cctx->sptr;
622		717	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	{	718	}
630	perror (stderr, "FATAL: unable to malloc stack for coroutine");
631	_exit (EXIT_FAILURE);
632	}
633		719
634	#endif	720	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);	721	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
637		722
638	return stack;	723	return cctx;
639	}	724	}
640		725
641	static void	726	static void
642	stack_free (coro_stack *stack)	727	cctx_destroy (coro_cctx *cctx)
643	{	728	{
644	if (!stack || stack == main_stack)	729	if (!cctx)
645	return;	730	return;
646		731
		732	--cctx_count;
		733
		734	#if CORO_USE_VALGRIND
		735	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		736	#endif
		737
647	#if HAVE_MMAP	738	#if HAVE_MMAP
		739	if (cctx->mapped)
648	munmap (stack->sptr, stack->ssize);	740	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	741	else
		742	#endif
		743	Safefree (cctx->sptr);
		744
		745	Safefree (cctx);
		746	}
		747
		748	static coro_cctx *
		749	cctx_get (pTHX)
		750	{
		751	while (cctx_first)
669	{	752	{
670	stack = stack_new ();	753	coro_cctx *cctx = cctx_first;
		754	cctx_first = cctx->next;
		755	--cctx_idle;
		756
		757	if (cctx->ssize >= coro_stacksize)
		758	return cctx;
		759
		760	cctx_destroy (cctx);
		761	}
		762
671	PL_op = PL_op->op_next;	763	PL_op = PL_op->op_next;
		764	return cctx_new ();
		765	}
		766
		767	static void
		768	cctx_put (coro_cctx *cctx)
		769	{
		770	/* free another cctx if overlimit */
		771	if (cctx_idle >= MAX_IDLE_CCTX)
		772	{
		773	coro_cctx *first = cctx_first;
		774	cctx_first = first->next;
		775	--cctx_idle;
		776
		777	assert (!first->inuse);
		778	cctx_destroy (first);
672	}	779	}
673		780
674	return stack;	781	++cctx_idle;
		782	cctx->next = cctx_first;
		783	cctx_first = cctx;
675	}	784	}
676		785
677	static void	786	/** coroutine switching *****************************************************/
678	stack_put (coro_stack *stack)
679	{
680	stack->next = stack_first;
681	stack_first = stack;
682	}
683		787
684	/* never call directly, always through the coro_state_transfer global variable */	788	/* never call directly, always through the coro_state_transfer global variable */
685	static void	789	static void NOINLINE
686	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	790	transfer (pTHX_ struct coro *prev, struct coro *next)
687	{	791	{
688	dSTACKLEVEL;	792	dSTACKLEVEL;
689		793
690	/* sometimes transfer is only called to set idle_sp */	794	/* sometimes transfer is only called to set idle_sp */
691	if (flags == TRANSFER_SET_STACKLEVEL)	795	if (!next)
		796	{
692	((coro_stack *)prev)->idle_sp = STACKLEVEL;	797	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		798	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		799	}
693	else if (prev != next)	800	else if (prev != next)
694	{	801	{
695	coro_stack *prev__stack;	802	coro_cctx *prev__cctx;
		803
		804	if (prev->flags & CF_NEW)
		805	{
		806	/* create a new empty context */
		807	Newz (0, prev->cctx, 1, coro_cctx);
		808	prev->cctx->inuse = 1;
		809	prev->flags &= ~CF_NEW;
		810	prev->flags |= CF_RUNNING;
		811	}
		812
		813	/*TODO: must not croak here */
		814	if (!prev->flags & CF_RUNNING)
		815	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		816
		817	if (next->flags & CF_RUNNING)
		818	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		819
		820	if (next->flags & CF_DESTROYED)
		821	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		822
		823	prev->flags &= ~CF_RUNNING;
		824	next->flags |= CF_RUNNING;
696		825
697	LOCK;	826	LOCK;
698		827
699	if (next->mainstack)	828	if (next->flags & CF_NEW)
700	{	829	{
701	/* coroutine already started */	830	/* need to start coroutine */
702	SAVE (prev, flags);	831	next->flags &= ~CF_NEW;
703	LOAD (next);	832	/* first get rid of the old state */
		833	save_perl (aTHX_ prev);
		834	/* setup coroutine call */
		835	setup_coro (aTHX_ next);
		836	/* need a new stack */
		837	assert (!next->cctx);
704	}	838	}
705	else	839	else
706	{	840	{
707	/* need to start coroutine */	841	/* coroutine already started */
708	/* first get rid of the old state */	842	save_perl (aTHX_ prev);
709	SAVE (prev, -1);	843	load_perl (aTHX_ next);
710	/* setup coroutine call */
711	setup_coro (next);
712	/* need a stack */
713	next->stack = 0;
714	}	844	}
715		845
716	prev__stack = prev->stack;	846	prev__cctx = prev->cctx;
717		847
718	/* possibly "free" the stack */	848	/* possibly "free" the cctx */
719	if (prev__stack->idle_sp == STACKLEVEL)	849	if (prev__cctx->idle_sp == STACKLEVEL)
720	{	850	{
721	stack_put (prev__stack);	851	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		852	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		853
722	prev->stack = 0;	854	prev->cctx = 0;
		855
		856	cctx_put (prev__cctx);
		857	prev__cctx->inuse = 0;
723	}	858	}
724		859
725	if (!next->stack)	860	if (!next->cctx)
726	next->stack = stack_get ();
727
728	if (prev__stack != next->stack)
729	{	861	{
730	prev__stack->top_env = PL_top_env;	862	next->cctx = cctx_get (aTHX);
731	PL_top_env = next->stack->top_env;	863	assert (!next->cctx->inuse);
732	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	864	next->cctx->inuse = 1;
733	}	865	}
734		866
		867	if (prev__cctx != next->cctx)
		868	{
		869	prev__cctx->top_env = PL_top_env;
		870	PL_top_env = next->cctx->top_env;
		871	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		872	}
		873
735	free_coro_mortal ();	874	free_coro_mortal (aTHX);
736
737	UNLOCK;	875	UNLOCK;
738	}	876	}
739	}	877	}
740		878
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	879	struct transfer_args
747	{	880	{
748	struct coro *prev, *next;	881	struct coro *prev, *next;
749	int flags;
750	};	882	};
751		883
752	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	884	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
753		885
		886	/** high level stuff ********************************************************/
		887
754	static void	888	static int
755	coro_state_destroy (struct coro *coro)	889	coro_state_destroy (pTHX_ struct coro *coro)
756	{	890	{
757	if (coro->refcnt--)	891	if (coro->flags & CF_DESTROYED)
758	return;	892	return 0;
		893
		894	coro->flags |= CF_DESTROYED;
		895
		896	if (coro->flags & CF_READY)
		897	{
		898	/* reduce nready, as destroying a ready coro effectively unreadies it */
		899	/* alternative: look through all ready queues and remove the coro */
		900	LOCK;
		901	--coro_nready;
		902	UNLOCK;
		903	}
		904	else
		905	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
759		906
760	if (coro->mainstack && coro->mainstack != main_mainstack)	907	if (coro->mainstack && coro->mainstack != main_mainstack)
761	{	908	{
762	struct coro temp;	909	struct coro temp;
763		910
764	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	911	assert (!(coro->flags & CF_RUNNING));
		912
		913	Zero (&temp, 1, struct coro);
		914	temp.save = CORO_SAVE_ALL;
		915
		916	if (coro->flags & CF_RUNNING)
		917	croak ("FATAL: tried to destroy currently running coroutine");
		918
		919	save_perl (aTHX_ &temp);
765	LOAD (aTHX_ coro);	920	load_perl (aTHX_ coro);
766		921
767	destroy_stacks (aTHX);	922	coro_destroy_stacks (aTHX);
768		923
769	LOAD ((&temp)); /* this will get rid of defsv etc.. */	924	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
770		925
771	coro->mainstack = 0;	926	coro->mainstack = 0;
772	}	927	}
773		928
774	stack_free (coro->stack);	929	cctx_destroy (coro->cctx);
775	SvREFCNT_dec (coro->args);	930	SvREFCNT_dec (coro->args);
776	Safefree (coro);	931
		932	if (coro->next) coro->next->prev = coro->prev;
		933	if (coro->prev) coro->prev->next = coro->next;
		934	if (coro == coro_first) coro_first = coro->next;
		935
		936	return 1;
777	}	937	}
778		938
779	static int	939	static int
780	coro_state_clear (SV *sv, MAGIC *mg)	940	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
781	{	941	{
782	struct coro *coro = (struct coro *)mg->mg_ptr;	942	struct coro *coro = (struct coro *)mg->mg_ptr;
783	mg->mg_ptr = 0;	943	mg->mg_ptr = 0;
784		944
		945	coro->hv = 0;
		946
		947	if (--coro->refcnt < 0)
		948	{
785	coro_state_destroy (coro);	949	coro_state_destroy (aTHX_ coro);
		950	Safefree (coro);
		951	}
786		952
787	return 0;	953	return 0;
788	}	954	}
789		955
790	static int	956	static int
791	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	957	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
792	{	958	{
793	struct coro *coro = (struct coro *)mg->mg_ptr;	959	struct coro *coro = (struct coro *)mg->mg_ptr;
794		960
795	++coro->refcnt;	961	++coro->refcnt;
796		962
797	return 0;	963	return 0;
798	}	964	}
799		965
800	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	966	static MGVTBL coro_state_vtbl = {
		967	0, 0, 0, 0,
		968	coro_state_free,
		969	0,
		970	#ifdef MGf_DUP
		971	coro_state_dup,
		972	#else
		973	# define MGf_DUP 0
		974	#endif
		975	};
801		976
802	static struct coro *	977	static struct coro *
803	SvSTATE (SV *coro)	978	SvSTATE_ (pTHX_ SV *coro)
804	{	979	{
805	HV *stash;	980	HV *stash;
806	MAGIC *mg;	981	MAGIC *mg;
807		982
808	if (SvROK (coro))	983	if (SvROK (coro))
…		…
814	/* very slow, but rare, check */	989	/* very slow, but rare, check */
815	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	990	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
816	croak ("Coro::State object required");	991	croak ("Coro::State object required");
817	}	992	}
818		993
819	mg = SvMAGIC (coro);	994	mg = CORO_MAGIC (coro);
820	assert (mg->mg_type == PERL_MAGIC_ext);
821	return (struct coro *)mg->mg_ptr;	995	return (struct coro *)mg->mg_ptr;
822	}	996	}
823		997
		998	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		999
824	static void	1000	static void
825	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	1001	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
826	{	1002	{
827	ta->prev = SvSTATE (prev);	1003	ta->prev = SvSTATE (prev_sv);
828	ta->next = SvSTATE (next);	1004	ta->next = SvSTATE (next_sv);
829	ta->flags = flags;
830	}	1005	}
831		1006
832	static void	1007	static void
833	api_transfer (SV *prev, SV *next, int flags)	1008	api_transfer (SV *prev_sv, SV *next_sv)
834	{	1009	{
835	dTHX;	1010	dTHX;
836	struct transfer_args ta;	1011	struct transfer_args ta;
837		1012
838	prepare_transfer (aTHX_ &ta, prev, next, flags);	1013	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
839	TRANSFER (ta);	1014	TRANSFER (ta);
840	}	1015	}
841		1016
		1017	static int
		1018	api_save (SV *coro_sv, int new_save)
		1019	{
		1020	dTHX;
		1021	struct coro *coro = SvSTATE (coro_sv);
		1022	int old_save = coro->save;
		1023
		1024	if (new_save >= 0)
		1025	coro->save = new_save;
		1026
		1027	return old_save;
		1028	}
		1029
842	/** Coro ********************************************************************/	1030	/** Coro ********************************************************************/
843		1031
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	1032	static void
857	coro_enq (pTHX_ SV *sv)	1033	coro_enq (pTHX_ SV *coro_sv)
858	{	1034	{
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);	1035	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
867	coro_nready++;
868	}	1036	}
869		1037
870	static SV *	1038	static SV *
871	coro_deq (pTHX_ int min_prio)	1039	coro_deq (pTHX_ int min_prio)
872	{	1040	{
…		…
876	if (min_prio < 0)	1044	if (min_prio < 0)
877	min_prio = 0;	1045	min_prio = 0;
878		1046
879	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1047	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
880	if (AvFILLp (coro_ready [prio]) >= 0)	1048	if (AvFILLp (coro_ready [prio]) >= 0)
881	{
882	coro_nready--;
883	return av_shift (coro_ready [prio]);	1049	return av_shift (coro_ready [prio]);
884	}
885		1050
886	return 0;	1051	return 0;
887	}	1052	}
888		1053
889	static void	1054	static int
890	api_ready (SV *coro)	1055	api_ready (SV *coro_sv)
891	{	1056	{
892	dTHX;	1057	dTHX;
		1058	struct coro *coro;
893		1059
894	if (SvROK (coro))	1060	if (SvROK (coro_sv))
895	coro = SvRV (coro);	1061	coro_sv = SvRV (coro_sv);
		1062
		1063	coro = SvSTATE (coro_sv);
		1064
		1065	if (coro->flags & CF_READY)
		1066	return 0;
		1067
		1068	coro->flags |= CF_READY;
896		1069
897	LOCK;	1070	LOCK;
898	coro_enq (aTHX_ SvREFCNT_inc (coro));	1071	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1072	++coro_nready;
899	UNLOCK;	1073	UNLOCK;
900	}
901		1074
		1075	return 1;
		1076	}
		1077
902	static void	1078	static int
		1079	api_is_ready (SV *coro_sv)
		1080	{
		1081	dTHX;
		1082	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1083	}
		1084
		1085	static void
903	prepare_schedule (aTHX_ struct transfer_args *ta)	1086	prepare_schedule (pTHX_ struct transfer_args *ta)
904	{	1087	{
905	SV *current, *prev, *next;	1088	SV *prev_sv, *next_sv;
		1089
		1090	for (;;)
		1091	{
		1092	LOCK;
		1093	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1094
		1095	/* nothing to schedule: call the idle handler */
		1096	if (!next_sv)
		1097	{
		1098	dSP;
		1099	UNLOCK;
		1100
		1101	ENTER;
		1102	SAVETMPS;
		1103
		1104	PUSHMARK (SP);
		1105	PUTBACK;
		1106	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1107
		1108	FREETMPS;
		1109	LEAVE;
		1110	continue;
		1111	}
		1112
		1113	ta->next = SvSTATE (next_sv);
		1114
		1115	/* cannot transfer to destroyed coros, skip and look for next */
		1116	if (ta->next->flags & CF_DESTROYED)
		1117	{
		1118	UNLOCK;
		1119	SvREFCNT_dec (next_sv);
		1120	/* coro_nready is already taken care of by destroy */
		1121	continue;
		1122	}
		1123
		1124	--coro_nready;
		1125	UNLOCK;
		1126	break;
		1127	}
		1128
		1129	/* free this only after the transfer */
		1130	prev_sv = SvRV (coro_current);
		1131	SvRV_set (coro_current, next_sv);
		1132	ta->prev = SvSTATE (prev_sv);
		1133
		1134	assert (ta->next->flags & CF_READY);
		1135	ta->next->flags &= ~CF_READY;
906		1136
907	LOCK;	1137	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 ();	1138	free_coro_mortal (aTHX);
942	coro_mortal = prev;	1139	coro_mortal = prev_sv;
943
944	ta->prev = SvSTATE (prev);
945	ta->next = SvSTATE (next);
946	ta->flags = TRANSFER_SAVE_ALL;
947
948	UNLOCK;	1140	UNLOCK;
949	}	1141	}
950		1142
951	static void	1143	static void
952	prepare_cede (aTHX_ struct transfer_args *ta)	1144	prepare_cede (pTHX_ struct transfer_args *ta)
953	{	1145	{
954	LOCK;	1146	api_ready (coro_current);
955	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
956	UNLOCK;
957
958	prepare_schedule (ta);	1147	prepare_schedule (aTHX_ ta);
		1148	}
		1149
		1150	static int
		1151	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1152	{
		1153	if (coro_nready)
		1154	{
		1155	SV *prev = SvRV (coro_current);
		1156	prepare_schedule (aTHX_ ta);
		1157	api_ready (prev);
		1158	return 1;
		1159	}
		1160	else
		1161	return 0;
959	}	1162	}
960		1163
961	static void	1164	static void
962	api_schedule (void)	1165	api_schedule (void)
963	{	1166	{
964	dTHX;	1167	dTHX;
965	struct transfer_args ta;	1168	struct transfer_args ta;
966		1169
967	prepare_schedule (&ta);	1170	prepare_schedule (aTHX_ &ta);
968	TRANSFER (ta);	1171	TRANSFER (ta);
969	}	1172	}
970		1173
971	static void	1174	static int
972	api_cede (void)	1175	api_cede (void)
973	{	1176	{
974	dTHX;	1177	dTHX;
975	struct transfer_args ta;	1178	struct transfer_args ta;
976		1179
977	prepare_cede (&ta);	1180	prepare_cede (aTHX_ &ta);
		1181
		1182	if (ta.prev != ta.next)
		1183	{
978	TRANSFER (ta);	1184	TRANSFER (ta);
		1185	return 1;
		1186	}
		1187	else
		1188	return 0;
		1189	}
		1190
		1191	static int
		1192	api_cede_notself (void)
		1193	{
		1194	dTHX;
		1195	struct transfer_args ta;
		1196
		1197	if (prepare_cede_notself (aTHX_ &ta))
		1198	{
		1199	TRANSFER (ta);
		1200	return 1;
		1201	}
		1202	else
		1203	return 0;
979	}	1204	}
980		1205
981	MODULE = Coro::State PACKAGE = Coro::State	1206	MODULE = Coro::State PACKAGE = Coro::State
982		1207
983	PROTOTYPES: DISABLE	1208	PROTOTYPES: DISABLE
…		…
989	#endif	1214	#endif
990	BOOT_PAGESIZE;	1215	BOOT_PAGESIZE;
991		1216
992	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1217	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
993		1218
994	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1219	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
995	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1220	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
996	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1221	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1222	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1223	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1224	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1225	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
997		1226
998	main_mainstack = PL_mainstack;	1227	main_mainstack = PL_mainstack;
		1228	main_top_env = PL_top_env;
		1229
		1230	while (main_top_env->je_prev)
		1231	main_top_env = main_top_env->je_prev;
999		1232
1000	coroapi.ver = CORO_API_VERSION;	1233	coroapi.ver = CORO_API_VERSION;
1001	coroapi.transfer = api_transfer;	1234	coroapi.transfer = api_transfer;
1002
1003	Newz (0, main_stack, 1, coro_stack);
1004	main_stack->idle_sp = (void *)-1;
1005		1235
1006	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1236	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1007	}	1237	}
1008		1238
1009	SV *	1239	SV *
…		…
1014	HV *hv;	1244	HV *hv;
1015	int i;	1245	int i;
1016		1246
1017	Newz (0, coro, 1, struct coro);	1247	Newz (0, coro, 1, struct coro);
1018	coro->args = newAV ();	1248	coro->args = newAV ();
		1249	coro->save = CORO_SAVE_DEF;
		1250	coro->flags = CF_NEW;
1019		1251
		1252	if (coro_first) coro_first->prev = coro;
		1253	coro->next = coro_first;
		1254	coro_first = coro;
		1255
1020	hv = newHV ();	1256	coro->hv = hv = newHV ();
1021	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1257	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));	1258	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1023		1259
1024	for (i = 1; i < items; i++)	1260	for (i = 1; i < items; i++)
1025	av_push (coro->args, newSVsv (ST (i)));	1261	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	}	1262	}
1031	OUTPUT:	1263	OUTPUT:
1032	RETVAL	1264	RETVAL
1033		1265
		1266	int
		1267	save (SV *coro, int new_save = -1)
		1268	CODE:
		1269	RETVAL = api_save (coro, new_save);
		1270	OUTPUT:
		1271	RETVAL
		1272
		1273	int
		1274	save_also (SV *coro_sv, int save_also)
		1275	CODE:
		1276	{
		1277	struct coro *coro = SvSTATE (coro_sv);
		1278	RETVAL = coro->save;
		1279	coro->save |= save_also;
		1280	}
		1281	OUTPUT:
		1282	RETVAL
		1283
1034	void	1284	void
1035	transfer (...)	1285	_set_stacklevel (...)
1036	ALIAS:	1286	ALIAS:
1037	Coro::schedule = 1	1287	Coro::State::transfer = 1
1038	Coro::cede = 2	1288	Coro::schedule = 2
1039	_set_stacklevel = 3	1289	Coro::cede = 3
		1290	Coro::cede_notself = 4
1040	CODE:	1291	CODE:
1041	{	1292	{
1042	struct transfer_args ta;	1293	struct transfer_args ta;
1043		1294
1044	switch (ix)	1295	switch (ix)
1045	{	1296	{
1046	case 0:	1297	case 0:
1047	if (items != 3)	1298	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1048	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1299	ta.next = 0;
1049
1050	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1051	break;	1300	break;
1052		1301
1053	case 1:	1302	case 1:
1054	prepare_schedule (&ta);	1303	if (items != 2)
		1304	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1305
		1306	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1055	break;	1307	break;
1056		1308
1057	case 2:	1309	case 2:
1058	prepare_cede (&ta);	1310	prepare_schedule (aTHX_ &ta);
1059	break;	1311	break;
1060		1312
1061	case 3:	1313	case 3:
1062	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1314	prepare_cede (aTHX_ &ta);
1063	ta.next = 0;	1315	break;
1064	ta.flags = TRANSFER_SET_STACKLEVEL;	1316
		1317	case 4:
		1318	if (!prepare_cede_notself (aTHX_ &ta))
		1319	XSRETURN_EMPTY;
		1320
1065	break;	1321	break;
1066	}	1322	}
1067		1323
		1324	BARRIER;
1068	TRANSFER (ta);	1325	TRANSFER (ta);
1069	}
1070		1326
1071	void	1327	if (GIMME_V != G_VOID && ta.next != ta.prev)
1072	_clone_state_from (SV *dst, SV *src)	1328	XSRETURN_YES;
		1329	}
		1330
		1331	bool
		1332	_destroy (SV *coro_sv)
1073	CODE:	1333	CODE:
1074	{	1334	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1075	struct coro *coro_src = SvSTATE (src);	1335	OUTPUT:
1076		1336	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		1337
1089	void	1338	void
1090	_exit (code)	1339	_exit (code)
1091	int code	1340	int code
1092	PROTOTYPE: $	1341	PROTOTYPE: $
1093	CODE:	1342	CODE:
1094	_exit (code);	1343	_exit (code);
1095		1344
1096	MODULE = Coro::State PACKAGE = Coro::Cont	1345	int
		1346	cctx_stacksize (int new_stacksize = 0)
		1347	CODE:
		1348	RETVAL = coro_stacksize;
		1349	if (new_stacksize)
		1350	coro_stacksize = new_stacksize;
		1351	OUTPUT:
		1352	RETVAL
		1353
		1354	int
		1355	cctx_count ()
		1356	CODE:
		1357	RETVAL = cctx_count;
		1358	OUTPUT:
		1359	RETVAL
		1360
		1361	int
		1362	cctx_idle ()
		1363	CODE:
		1364	RETVAL = cctx_idle;
		1365	OUTPUT:
		1366	RETVAL
1097		1367
1098	void	1368	void
1099	yield (...)	1369	list ()
1100	PROTOTYPE: @	1370	PPCODE:
		1371	{
		1372	struct coro *coro;
		1373	for (coro = coro_first; coro; coro = coro->next)
		1374	if (coro->hv)
		1375	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1376	}
		1377
		1378	void
		1379	_eval (Coro::State coro, SV *coderef)
		1380	CODE:
		1381	{
		1382	if (coro->mainstack)
		1383	{
		1384	struct coro temp;
		1385	Zero (&temp, 1, struct coro);
		1386	temp.save = CORO_SAVE_ALL;
		1387
		1388	if (!(coro->flags & CF_RUNNING))
		1389	{
		1390	save_perl (aTHX_ &temp);
		1391	load_perl (aTHX_ coro);
		1392	}
		1393
		1394	{
		1395	dSP;
		1396	ENTER;
		1397	SAVETMPS;
		1398	PUSHMARK (SP);
		1399	PUTBACK;
		1400	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1401	SPAGAIN;
		1402	FREETMPS;
		1403	LEAVE;
		1404	PUTBACK;
		1405	}
		1406
		1407	if (!(coro->flags & CF_RUNNING))
		1408	{
		1409	save_perl (aTHX_ coro);
		1410	load_perl (aTHX_ &temp);
		1411	}
		1412	}
		1413	}
		1414
		1415	SV *
		1416	is_ready (Coro::State coro)
		1417	PROTOTYPE: $
		1418	ALIAS:
		1419	is_ready = CF_READY
		1420	is_running = CF_RUNNING
		1421	is_new = CF_NEW
		1422	is_destroyed = CF_DESTROYED
		1423	CODE:
		1424	RETVAL = boolSV (coro->flags & ix);
		1425	OUTPUT:
		1426	RETVAL
		1427
		1428	IV
		1429	rss (Coro::State coro)
		1430	PROTOTYPE: $
1101	CODE:	1431	CODE:
1102	{	1432	RETVAL = coro_rss (coro);
1103	SV *yieldstack;	1433	OUTPUT:
1104	SV *sv;	1434	RETVAL
1105	AV *defav = GvAV (PL_defgv);
1106	struct coro *prev, *next;
1107		1435
1108	yieldstack = *hv_fetch (
1109	(HV *)SvRV (GvSV (coro_current)),
1110	"yieldstack", sizeof ("yieldstack") - 1,
1111	0
1112	);
1113
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		1436
1128	MODULE = Coro::State PACKAGE = Coro	1437	MODULE = Coro::State PACKAGE = Coro
1129		1438
1130	BOOT:	1439	BOOT:
1131	{	1440	{
…		…
1138	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1447	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1139	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1448	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1140	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1449	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1141	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1450	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1142		1451
1143	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1452	coro_current = get_sv ("Coro::current", FALSE);
1144	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1453	SvREADONLY_on (coro_current);
1145		1454
1146	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1455	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1147	coro_ready[i] = newAV ();	1456	coro_ready[i] = newAV ();
1148		1457
1149	{	1458	{
1150	SV *sv = perl_get_sv("Coro::API", 1);	1459	SV *sv = perl_get_sv("Coro::API", 1);
1151		1460
1152	coroapi.schedule = api_schedule;	1461	coroapi.schedule = api_schedule;
		1462	coroapi.save = api_save;
1153	coroapi.cede = api_cede;	1463	coroapi.cede = api_cede;
		1464	coroapi.cede_notself = api_cede_notself;
1154	coroapi.ready = api_ready;	1465	coroapi.ready = api_ready;
		1466	coroapi.is_ready = api_is_ready;
1155	coroapi.nready = &coro_nready;	1467	coroapi.nready = &coro_nready;
1156	coroapi.current = coro_current;	1468	coroapi.current = coro_current;
1157		1469
1158	GCoroAPI = &coroapi;	1470	GCoroAPI = &coroapi;
1159	sv_setiv (sv, (IV)&coroapi);	1471	sv_setiv (sv, (IV)&coroapi);
1160	SvREADONLY_on (sv);	1472	SvREADONLY_on (sv);
1161	}	1473	}
1162	}	1474	}
		1475
		1476	void
		1477	_set_current (SV *current)
		1478	PROTOTYPE: $
		1479	CODE:
		1480	SvREFCNT_dec (SvRV (coro_current));
		1481	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1163		1482
1164	int	1483	int
1165	prio (Coro::State coro, int newprio = 0)	1484	prio (Coro::State coro, int newprio = 0)
1166	ALIAS:	1485	ALIAS:
1167	nice = 1	1486	nice = 1
…		…
1170	RETVAL = coro->prio;	1489	RETVAL = coro->prio;
1171		1490
1172	if (items > 1)	1491	if (items > 1)
1173	{	1492	{
1174	if (ix)	1493	if (ix)
1175	newprio += coro->prio;	1494	newprio = coro->prio - newprio;
1176		1495
1177	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1496	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1178	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1497	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1179		1498
1180	coro->prio = newprio;	1499	coro->prio = newprio;
1181	}	1500	}
1182	}	1501	}
		1502	OUTPUT:
		1503	RETVAL
1183		1504
1184	void	1505	SV *
1185	ready (SV *self)	1506	ready (SV *self)
1186	PROTOTYPE: $	1507	PROTOTYPE: $
1187	CODE:	1508	CODE:
1188	api_ready (self);	1509	RETVAL = boolSV (api_ready (self));
		1510	OUTPUT:
		1511	RETVAL
1189		1512
1190	int	1513	int
1191	nready (...)	1514	nready (...)
1192	PROTOTYPE:	1515	PROTOTYPE:
1193	CODE:	1516	CODE:
…		…
1199		1522
1200	SV *	1523	SV *
1201	_get_state ()	1524	_get_state ()
1202	CODE:	1525	CODE:
1203	{	1526	{
1204	struct {	1527	struct io_state *data;
1205	int errorno;
1206	int laststype;
1207	int laststatval;
1208	Stat_t statcache;
1209	} data;
1210		1528
		1529	RETVAL = newSV (sizeof (struct io_state));
		1530	data = (struct io_state *)SvPVX (RETVAL);
		1531	SvCUR_set (RETVAL, sizeof (struct io_state));
		1532	SvPOK_only (RETVAL);
		1533
1211	data.errorno = errno;	1534	data->errorno = errno;
1212	data.laststype = PL_laststype;	1535	data->laststype = PL_laststype;
1213	data.laststatval = PL_laststatval;	1536	data->laststatval = PL_laststatval;
1214	data.statcache = PL_statcache;	1537	data->statcache = PL_statcache;
1215
1216	RETVAL = newSVpvn ((char *)&data, sizeof data);
1217	}	1538	}
1218	OUTPUT:	1539	OUTPUT:
1219	RETVAL	1540	RETVAL
1220		1541
1221	void	1542	void
1222	_set_state (char *data_)	1543	_set_state (char *data_)
1223	PROTOTYPE: $	1544	PROTOTYPE: $
1224	CODE:	1545	CODE:
1225	{	1546	{
1226	struct {	1547	struct io_state *data = (void *)data_;
1227	int errorno;
1228	int laststype;
1229	int laststatval;
1230	Stat_t statcache;
1231	} *data = (void *)data_;
1232		1548
1233	errno = data->errorno;	1549	errno = data->errorno;
1234	PL_laststype = data->laststype;	1550	PL_laststype = data->laststype;
1235	PL_laststatval = data->laststatval;	1551	PL_laststatval = data->laststatval;
1236	PL_statcache = data->statcache;	1552	PL_statcache = data->statcache;
1237	}	1553	}
		1554

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