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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.99 by root, Sun Nov 26 23:53:20 2006 UTC vs.
Revision 1.151 by root, Wed Sep 19 21:39:15 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#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)
10	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
12	# endif	57	# endif
13	# ifndef call_sv	58	# ifndef call_sv
14	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
25	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
27	# endif	72	# endif
28	#endif	73	#endif
29		74
30	#include <stdio.h>	75	/* 5.8.7 */
31	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
32		79
33	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
34	# undef STACKGUARD	81	# undef CORO_STACKGUARD
35	#endif
36
37	#ifndef STACKGUARD
38	# define STACKGUARD 0
39	#endif
40
41	#ifdef HAVE_MMAP
42	# include <unistd.h>
43	# include <sys/mman.h>
44	# ifndef MAP_ANONYMOUS
45	# ifdef MAP_ANON
46	# define MAP_ANONYMOUS MAP_ANON
47	# else
48	# undef HAVE_MMAP
49	# endif
50	# endif	82	#endif
51	# include <limits.h>	83
52	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
53	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
54	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
55	static long pagesize;
56	# else
57	# define BOOT_PAGESIZE
58	# endif	86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
59	#endif	91	#endif
60		92
61	/* 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
62	* 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
63	* and should be unique. */	95	* and should be unique. */
64	#define dSTACKLEVEL int stacklevel	96	#define dSTACKLEVEL int stacklevel
65	#define STACKLEVEL ((void *)&stacklevel)	97	#define STACKLEVEL ((void *)&stacklevel)
66		98
67	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
68		100
		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))
		110
69	#include "CoroAPI.h"	111	#include "CoroAPI.h"
70
71	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
72		112
73	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
74	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
75	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
76	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
77	#else	117	#else
78	# define LOCK (void)0	118	# define LOCK (void)0
79	# define UNLOCK (void)0	119	# define UNLOCK (void)0
80	#endif	120	#endif
81		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;
82	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
83	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;
84	static HV *coro_state_stash, *coro_stash;	135	static HV *coro_state_stash, *coro_stash;
85	static SV *coro_mortal; /* will be freed after next transfer */	136	static SV *coro_mortal; /* will be freed after next transfer */
86		137
		138	static struct coro_cctx *cctx_first;
		139	static int cctx_count, cctx_idle;
		140
87	/* this is a structure representing a c-level coroutine */	141	/* this is a structure representing a c-level coroutine */
88	typedef struct coro_stack {	142	typedef struct coro_cctx {
89	struct coro_stack *next;	143	struct coro_cctx *next;
90		144
91	/* the stack */	145	/* the stack */
92	void *sptr;	146	void *sptr;
93	long ssize; /* positive == mmap, otherwise malloc */	147	size_t ssize;
94		148
95	/* cpu state */	149	/* cpu state */
96	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	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 */
97	JMPENV *top_env;	152	JMPENV *top_env;
98	coro_context cctx;	153	coro_context cctx;
99	} coro_stack;	154
		155	#if CORO_USE_VALGRIND
		156	int valgrind_id;
		157	#endif
		158	char inuse, mapped;
		159	} coro_cctx;
		160
		161	enum {
		162	CF_RUNNING = 0x0001, /* coroutine is running */
		163	CF_READY = 0x0002, /* coroutine is ready */
		164	CF_NEW = 0x0004, /* has never been switched to */
		165	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		166	};
100		167
101	/* this is a structure representing a perl-level coroutine */	168	/* this is a structure representing a perl-level coroutine */
102	struct coro {	169	struct coro {
103	/* the c coroutine allocated to this perl coroutine, if any */	170	/* the c coroutine allocated to this perl coroutine, if any */
104	coro_stack *stack;	171	coro_cctx *cctx;
105		172
106	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
107	AV *args;	174	AV *args;
108	int refcnt;	175	int refcnt;
		176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
109		178
110	/* optionally saved, might be zero */	179	/* optionally saved, might be zero */
111	AV *defav;	180	AV *defav; /* @_ */
112	SV *defsv;	181	SV *defsv; /* $_ */
113	SV *errsv;	182	SV *errsv; /* $@ */
		183	GV *deffh; /* default filehandle */
		184	SV *irssv; /* $/ */
		185	SV *irssv_sv; /* real $/ cache */
114		186
115	/* saved global state not related to stacks */	187	#define VAR(name,type) type name;
116	U8 dowarn;	188	# include "state.h"
117	I32 in_eval;	189	#undef VAR
118
119	/* the stacks and related info (callchain etc..) */
120	PERL_SI *curstackinfo;
121	AV *curstack;
122	AV *mainstack;
123	SV **stack_sp;
124	OP *op;
125	SV **curpad;
126	AV *comppad;
127	CV *compcv;
128	SV **stack_base;
129	SV **stack_max;
130	SV **tmps_stack;
131	I32 tmps_floor;
132	I32 tmps_ix;
133	I32 tmps_max;
134	I32 *markstack;
135	I32 *markstack_ptr;
136	I32 *markstack_max;
137	I32 *scopestack;
138	I32 scopestack_ix;
139	I32 scopestack_max;
140	ANY *savestack;
141	I32 savestack_ix;
142	I32 savestack_max;
143	OP **retstack;
144	I32 retstack_ix;
145	I32 retstack_max;
146	PMOP *curpm;
147	COP *curcop;
148		190
149	/* coro process data */	191	/* coro process data */
150	int prio;	192	int prio;
		193
		194	/* linked list */
		195	struct coro *next, *prev;
		196	HV *hv; /* the perl hash associated with this coro, if any */
151	};	197	};
152		198
153	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
154	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
155		201
		202	/** Coro ********************************************************************/
		203
		204	#define PRIO_MAX 3
		205	#define PRIO_HIGH 1
		206	#define PRIO_NORMAL 0
		207	#define PRIO_LOW -1
		208	#define PRIO_IDLE -3
		209	#define PRIO_MIN -4
		210
		211	/* for Coro.pm */
		212	static SV *coro_current;
		213	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		214	static int coro_nready;
		215	static struct coro *first;
		216
		217	/** lowlevel stuff **********************************************************/
		218
156	static AV *	219	static AV *
157	coro_clone_padlist (CV *cv)	220	coro_clone_padlist (pTHX_ CV *cv)
158	{	221	{
159	AV *padlist = CvPADLIST (cv);	222	AV *padlist = CvPADLIST (cv);
160	AV *newpadlist, *newpad;	223	AV *newpadlist, *newpad;
161		224
162	newpadlist = newAV ();	225	newpadlist = newAV ();
163	AvREAL_off (newpadlist);	226	AvREAL_off (newpadlist);
164	#if PERL_VERSION < 9	227	#if PERL_VERSION_ATLEAST (5,9,0)
		228	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		229	#else
165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	230	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
168	#endif	231	#endif
169	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	232	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170	--AvFILLp (padlist);	233	--AvFILLp (padlist);
171		234
172	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	235	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
174		237
175	return newpadlist;	238	return newpadlist;
176	}	239	}
177		240
178	static void	241	static void
179	free_padlist (AV *padlist)	242	free_padlist (pTHX_ AV *padlist)
180	{	243	{
181	/* may be during global destruction */	244	/* may be during global destruction */
182	if (SvREFCNT (padlist))	245	if (SvREFCNT (padlist))
183	{	246	{
184	I32 i = AvFILLp (padlist);	247	I32 i = AvFILLp (padlist);
…		…
205	AV *padlist;	268	AV *padlist;
206	AV *av = (AV *)mg->mg_obj;	269	AV *av = (AV *)mg->mg_obj;
207		270
208	/* casting is fun. */	271	/* casting is fun. */
209	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
210	free_padlist (padlist);	273	free_padlist (aTHX_ padlist);
211		274
212	SvREFCNT_dec (av);	275	SvREFCNT_dec (av);
213		276
214	return 0;	277	return 0;
215	}	278	}
216		279
217	#define PERL_MAGIC_coro PERL_MAGIC_ext	280	#define PERL_MAGIC_coro PERL_MAGIC_ext
218		281
219	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
220		283
		284	#define CORO_MAGIC(cv) \
		285	SvMAGIC (cv) \
		286	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		287	? SvMAGIC (cv) \
		288	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		289	: 0
		290
221	/* the next two functions merely cache the padlists */	291	/* the next two functions merely cache the padlists */
222	static void	292	static void
223	get_padlist (CV *cv)	293	get_padlist (pTHX_ CV *cv)
224	{	294	{
225	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	295	MAGIC *mg = CORO_MAGIC (cv);
		296	AV *av;
226		297
227	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
228	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229	else	300	else
230	{	301	{
231	#if 0	302	#if CORO_PREFER_PERL_FUNCTIONS
232	/* this is probably cleaner, but also slower? */	303	/* this is probably cleaner, but also slower? */
233	CV *cp = Perl_cv_clone (cv);	304	CV *cp = Perl_cv_clone (cv);
234	CvPADLIST (cv) = CvPADLIST (cp);	305	CvPADLIST (cv) = CvPADLIST (cp);
235	CvPADLIST (cp) = 0;	306	CvPADLIST (cp) = 0;
236	SvREFCNT_dec (cp);	307	SvREFCNT_dec (cp);
237	#else	308	#else
238	CvPADLIST (cv) = coro_clone_padlist (cv);	309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
239	#endif	310	#endif
240	}	311	}
241	}	312	}
242		313
243	static void	314	static void
244	put_padlist (CV *cv)	315	put_padlist (pTHX_ CV *cv)
245	{	316	{
246	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	317	MAGIC *mg = CORO_MAGIC (cv);
		318	AV *av;
247		319
248	if (!mg)	320	if (!mg)
249	{	321	{
250	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	322	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	323	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252	mg->mg_virtual = &vtbl_coro;	324	mg->mg_virtual = &vtbl_coro;
253	mg->mg_obj = (SV *)newAV ();	325	mg->mg_obj = (SV *)newAV ();
254	}	326	}
255		327
256	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	328	av = (AV *)mg->mg_obj;
		329
		330	if (AvFILLp (av) >= AvMAX (av))
		331	av_extend (av, AvMAX (av) + 1);
		332
		333	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
257	}	334	}
		335
		336	/** load & save, init *******************************************************/
258		337
259	#define SB do {	338	#define SB do {
260	#define SE } while (0)	339	#define SE } while (0)
261		340
262	#define LOAD(state) load_state((state));
263	#define SAVE(state,flags) save_state((state),(flags));
264
265	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	341	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
266		342
267	static void	343	static void
268	load_state(Coro__State c)	344	load_perl (pTHX_ Coro__State c)
269	{	345	{
270	PL_dowarn = c->dowarn;	346	#define VAR(name,type) PL_ ## name = c->name;
271	PL_in_eval = c->in_eval;	347	# include "state.h"
272		348	#undef VAR
273	PL_curstackinfo = c->curstackinfo;
274	PL_curstack = c->curstack;
275	PL_mainstack = c->mainstack;
276	PL_stack_sp = c->stack_sp;
277	PL_op = c->op;
278	PL_curpad = c->curpad;
279	PL_comppad = c->comppad;
280	PL_compcv = c->compcv;
281	PL_stack_base = c->stack_base;
282	PL_stack_max = c->stack_max;
283	PL_tmps_stack = c->tmps_stack;
284	PL_tmps_floor = c->tmps_floor;
285	PL_tmps_ix = c->tmps_ix;
286	PL_tmps_max = c->tmps_max;
287	PL_markstack = c->markstack;
288	PL_markstack_ptr = c->markstack_ptr;
289	PL_markstack_max = c->markstack_max;
290	PL_scopestack = c->scopestack;
291	PL_scopestack_ix = c->scopestack_ix;
292	PL_scopestack_max = c->scopestack_max;
293	PL_savestack = c->savestack;
294	PL_savestack_ix = c->savestack_ix;
295	PL_savestack_max = c->savestack_max;
296	#if PERL_VERSION < 9
297	PL_retstack = c->retstack;
298	PL_retstack_ix = c->retstack_ix;
299	PL_retstack_max = c->retstack_max;
300	#endif
301	PL_curpm = c->curpm;
302	PL_curcop = c->curcop;
303		349
304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
306	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	352	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		353	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		354
		355	if (c->irssv)
		356	{
		357	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		358	{
		359	SvREFCNT_dec (c->irssv);
		360	c->irssv = 0;
		361	}
		362	else
		363	{
		364	REPLACE_SV (PL_rs, c->irssv);
		365	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		366	sv_setsv (c->irssv_sv, PL_rs);
		367	}
		368	}
307		369
308	{	370	{
309	dSP;	371	dSP;
310	CV *cv;	372	CV *cv;
311		373
312	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
313	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
314	{	376	{
315	AV *padlist = (AV *)POPs;
316
317	if (padlist)
318	{
319	put_padlist (cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
320	CvPADLIST(cv) = padlist;	378	CvDEPTH (cv) = PTR2IV (POPs);
321	}	379	CvPADLIST (cv) = (AV *)POPs;
322
323	++CvDEPTH(cv);
324	}	380	}
325		381
326	PUTBACK;	382	PUTBACK;
327	}	383	}
328	}	384	}
329		385
330	static void	386	static void
331	save_state(Coro__State c, int flags)	387	save_perl (pTHX_ Coro__State c)
332	{	388	{
333	{	389	{
334	dSP;	390	dSP;
335	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
336	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
…		…
339	/*	395	/*
340	* the worst thing you can imagine happens first - we have to save	396	* the worst thing you can imagine happens first - we have to save
341	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
342	*/	398	*/
343		399
		400	EXTEND (SP, 3 + 1);
344	PUSHs (Nullsv);	401	PUSHs (Nullsv);
345	/* this loop was inspired by pp_caller */	402	/* this loop was inspired by pp_caller */
346	for (;;)	403	for (;;)
347	{	404	{
348	while (cxix >= 0)	405	while (cxix >= 0)
349	{	406	{
350	PERL_CONTEXT *cx = &ccstk[cxix--];	407	PERL_CONTEXT *cx = &ccstk[cxix--];
351		408
352	if (CxTYPE(cx) == CXt_SUB)	409	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
353	{	410	{
354	CV *cv = cx->blk_sub.cv;	411	CV *cv = cx->blk_sub.cv;
		412
355	if (CvDEPTH(cv))	413	if (CvDEPTH (cv))
356	{	414	{
357	EXTEND (SP, CvDEPTH(cv)*2);	415	EXTEND (SP, 3);
358
359	while (--CvDEPTH(cv))
360	{
361	/* this tells the restore code to increment CvDEPTH */
362	PUSHs (Nullsv);
363	PUSHs ((SV *)cv);
364	}
365
366	PUSHs ((SV *)CvPADLIST(cv));	416	PUSHs ((SV *)CvPADLIST (cv));
		417	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
367	PUSHs ((SV *)cv);	418	PUSHs ((SV *)cv);
368		419
		420	CvDEPTH (cv) = 0;
369	get_padlist (cv);	421	get_padlist (aTHX_ cv);
370	}	422	}
371	}	423	}
372	#ifdef CXt_FORMAT
373	else if (CxTYPE(cx) == CXt_FORMAT)
374	{
375	/* I never used formats, so how should I know how these are implemented? */
376	/* my bold guess is as a simple, plain sub... */
377	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
378	}
379	#endif
380	}	424	}
381		425
382	if (top_si->si_type == PERLSI_MAIN)	426	if (top_si->si_type == PERLSI_MAIN)
383	break;	427	break;
384		428
…		…
388	}	432	}
389		433
390	PUTBACK;	434	PUTBACK;
391	}	435	}
392		436
393	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	437	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
394	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	438	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
395	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	439	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		440	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		441	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
396		442
397	c->dowarn = PL_dowarn;	443	#define VAR(name,type)c->name = PL_ ## name;
398	c->in_eval = PL_in_eval;	444	# include "state.h"
399		445	#undef VAR
400	c->curstackinfo = PL_curstackinfo;
401	c->curstack = PL_curstack;
402	c->mainstack = PL_mainstack;
403	c->stack_sp = PL_stack_sp;
404	c->op = PL_op;
405	c->curpad = PL_curpad;
406	c->comppad = PL_comppad;
407	c->compcv = PL_compcv;
408	c->stack_base = PL_stack_base;
409	c->stack_max = PL_stack_max;
410	c->tmps_stack = PL_tmps_stack;
411	c->tmps_floor = PL_tmps_floor;
412	c->tmps_ix = PL_tmps_ix;
413	c->tmps_max = PL_tmps_max;
414	c->markstack = PL_markstack;
415	c->markstack_ptr = PL_markstack_ptr;
416	c->markstack_max = PL_markstack_max;
417	c->scopestack = PL_scopestack;
418	c->scopestack_ix = PL_scopestack_ix;
419	c->scopestack_max = PL_scopestack_max;
420	c->savestack = PL_savestack;
421	c->savestack_ix = PL_savestack_ix;
422	c->savestack_max = PL_savestack_max;
423	#if PERL_VERSION < 9
424	c->retstack = PL_retstack;
425	c->retstack_ix = PL_retstack_ix;
426	c->retstack_max = PL_retstack_max;
427	#endif
428	c->curpm = PL_curpm;
429	c->curcop = PL_curcop;
430	}	446	}
431		447
432	/*	448	/*
433	* allocate various perl stacks. This is an exact copy	449	* allocate various perl stacks. This is an exact copy
434	* of perl.c:init_stacks, except that it uses less memory	450	* of perl.c:init_stacks, except that it uses less memory
435	* on the (sometimes correct) assumption that coroutines do	451	* on the (sometimes correct) assumption that coroutines do
436	* not usually need a lot of stackspace.	452	* not usually need a lot of stackspace.
437	*/	453	*/
		454	#if CORO_PREFER_PERL_FUNCTIONS
		455	# define coro_init_stacks init_stacks
		456	#else
438	static void	457	static void
439	coro_init_stacks ()	458	coro_init_stacks (pTHX)
440	{	459	{
441	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	460	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
442	PL_curstackinfo->si_type = PERLSI_MAIN;	461	PL_curstackinfo->si_type = PERLSI_MAIN;
443	PL_curstack = PL_curstackinfo->si_stack;	462	PL_curstack = PL_curstackinfo->si_stack;
444	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	463	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
445		464
446	PL_stack_base = AvARRAY(PL_curstack);	465	PL_stack_base = AvARRAY(PL_curstack);
447	PL_stack_sp = PL_stack_base;	466	PL_stack_sp = PL_stack_base;
448	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	467	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
449		468
450	New(50,PL_tmps_stack,96,SV*);	469	New(50,PL_tmps_stack,128,SV*);
451	PL_tmps_floor = -1;	470	PL_tmps_floor = -1;
452	PL_tmps_ix = -1;	471	PL_tmps_ix = -1;
453	PL_tmps_max = 96;	472	PL_tmps_max = 128;
454		473
455	New(54,PL_markstack,16,I32);	474	New(54,PL_markstack,32,I32);
456	PL_markstack_ptr = PL_markstack;	475	PL_markstack_ptr = PL_markstack;
457	PL_markstack_max = PL_markstack + 16;	476	PL_markstack_max = PL_markstack + 32;
458		477
459	#ifdef SET_MARK_OFFSET	478	#ifdef SET_MARK_OFFSET
460	SET_MARK_OFFSET;	479	SET_MARK_OFFSET;
461	#endif	480	#endif
462		481
463	New(54,PL_scopestack,16,I32);	482	New(54,PL_scopestack,32,I32);
464	PL_scopestack_ix = 0;	483	PL_scopestack_ix = 0;
465	PL_scopestack_max = 16;	484	PL_scopestack_max = 32;
466		485
467	New(54,PL_savestack,96,ANY);	486	New(54,PL_savestack,64,ANY);
468	PL_savestack_ix = 0;	487	PL_savestack_ix = 0;
469	PL_savestack_max = 96;	488	PL_savestack_max = 64;
470		489
471	#if PERL_VERSION < 9	490	#if !PERL_VERSION_ATLEAST (5,9,0)
472	New(54,PL_retstack,8,OP*);	491	New(54,PL_retstack,16,OP*);
473	PL_retstack_ix = 0;	492	PL_retstack_ix = 0;
474	PL_retstack_max = 8;	493	PL_retstack_max = 16;
475	#endif	494	#endif
476	}	495	}
		496	#endif
477		497
478	/*	498	/*
479	* destroy the stacks, the callchain etc...	499	* destroy the stacks, the callchain etc...
480	*/	500	*/
481	static void	501	static void
482	destroy_stacks()	502	coro_destroy_stacks (pTHX)
483	{	503	{
484	if (!IN_DESTRUCT)	504	if (!IN_DESTRUCT)
485	{	505	{
486	/* is this ugly, I ask? */	506	/* restore all saved variables and stuff */
487	LEAVE_SCOPE (0);	507	LEAVE_SCOPE (0);
		508	assert (PL_tmps_floor == -1);
488		509
489	/* sure it is, but more important: is it correct?? :/ */	510	/* free all temporaries */
490	FREETMPS;	511	FREETMPS;
		512	assert (PL_tmps_ix == -1);
491		513
		514	/* unwind all extra stacks */
492	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	515	POPSTACK_TO (PL_mainstack);
		516
		517	/* unwind main stack */
		518	dounwind (-1);
493	}	519	}
494		520
495	while (PL_curstackinfo->si_next)	521	while (PL_curstackinfo->si_next)
496	PL_curstackinfo = PL_curstackinfo->si_next;	522	PL_curstackinfo = PL_curstackinfo->si_next;
497		523
498	while (PL_curstackinfo)	524	while (PL_curstackinfo)
499	{	525	{
500	PERL_SI *p = PL_curstackinfo->si_prev;	526	PERL_SI *p = PL_curstackinfo->si_prev;
501		527
502	{ /*D*//*remove*/
503	dSP;
504	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
505	PUTBACK; /* possibly superfluous */
506	}
507
508	if (!IN_DESTRUCT)	528	if (!IN_DESTRUCT)
509	{
510	dounwind (-1);/*D*//*remove*/
511	SvREFCNT_dec (PL_curstackinfo->si_stack);	529	SvREFCNT_dec (PL_curstackinfo->si_stack);
512	}
513		530
514	Safefree (PL_curstackinfo->si_cxstack);	531	Safefree (PL_curstackinfo->si_cxstack);
515	Safefree (PL_curstackinfo);	532	Safefree (PL_curstackinfo);
516	PL_curstackinfo = p;	533	PL_curstackinfo = p;
517	}	534	}
518		535
519	Safefree (PL_tmps_stack);	536	Safefree (PL_tmps_stack);
520	Safefree (PL_markstack);	537	Safefree (PL_markstack);
521	Safefree (PL_scopestack);	538	Safefree (PL_scopestack);
522	Safefree (PL_savestack);	539	Safefree (PL_savestack);
523	#if PERL_VERSION < 9	540	#if !PERL_VERSION_ATLEAST (5,9,0)
524	Safefree (PL_retstack);	541	Safefree (PL_retstack);
525	#endif	542	#endif
526	}	543	}
527		544
		545	/** coroutine stack handling ************************************************/
		546
528	static void	547	static void
529	setup_coro (struct coro *coro)	548	setup_coro (pTHX_ struct coro *coro)
530	{	549	{
531	/*	550	/*
532	* emulate part of the perl startup here.	551	* emulate part of the perl startup here.
533	*/	552	*/
534	dTHX;	553	coro_init_stacks (aTHX);
		554
		555	PL_curcop = &PL_compiling;
		556	PL_in_eval = EVAL_NULL;
		557	PL_comppad = 0;
		558	PL_curpm = 0;
		559	PL_localizing = 0;
		560	PL_dirty = 0;
		561	PL_restartop = 0;
		562
		563	{
		564	dSP;
		565	LOGOP myop;
		566
		567	SvREFCNT_dec (GvAV (PL_defgv));
		568	GvAV (PL_defgv) = coro->args; coro->args = 0;
		569
		570	Zero (&myop, 1, LOGOP);
		571	myop.op_next = Nullop;
		572	myop.op_flags = OPf_WANT_VOID;
		573
		574	PUSHMARK (SP);
		575	XPUSHs (av_shift (GvAV (PL_defgv)));
		576	PUTBACK;
		577	PL_op = (OP *)&myop;
		578	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		579	SPAGAIN;
		580	}
		581
		582	ENTER; /* necessary e.g. for dounwind */
		583	}
		584
		585	static void
		586	free_coro_mortal (pTHX)
		587	{
		588	if (coro_mortal)
		589	{
		590	SvREFCNT_dec (coro_mortal);
		591	coro_mortal = 0;
		592	}
		593	}
		594
		595	/* inject a fake call to Coro::State::_cctx_init into the execution */
		596	/* _cctx_init should be careful, as it could be called at almost any time */
		597	/* during execution of a perl program */
		598	static void NOINLINE
		599	prepare_cctx (pTHX_ coro_cctx *cctx)
		600	{
535	dSP;	601	dSP;
536	UNOP myop;	602	LOGOP myop;
537	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
538		603
539	coro_init_stacks ();
540	/*PL_curcop = 0;*/
541	/*PL_in_eval = PL_in_eval;*/ /* inherit */
542	SvREFCNT_dec (GvAV (PL_defgv));
543	GvAV (PL_defgv) = coro->args; coro->args = 0;
544
545	SPAGAIN;
546
547	Zero (&myop, 1, UNOP);	604	Zero (&myop, 1, LOGOP);
548	myop.op_next = Nullop;	605	myop.op_next = PL_op;
549	myop.op_flags = OPf_WANT_VOID;	606	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
550		607
		608	PUSHMARK (SP);
		609	EXTEND (SP, 2);
		610	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		611	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		612	PUTBACK;
551	PL_op = (OP *)&myop;	613	PL_op = (OP *)&myop;
552
553	PUSHMARK(SP);
554	XPUSHs (sub_init);
555	PUTBACK;
556	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	614	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
557	SPAGAIN;	615	SPAGAIN;
558
559	ENTER; /* necessary e.g. for dounwind */
560	}	616	}
561		617
562	static void	618	/*
563	free_coro_mortal ()	619	* this is a _very_ stripped down perl interpreter ;)
564	{	620	*/
565	if (coro_mortal)
566	{
567	SvREFCNT_dec (coro_mortal);
568	coro_mortal = 0;
569	}
570	}
571
572	static void
573	prepare_cctx (coro_stack *cctx)
574	{
575	dSP;
576	UNOP myop;
577
578	Zero (&myop, 1, UNOP);
579	myop.op_next = PL_op;
580	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
581
582	PUSHMARK(SP);
583	EXTEND (SP, 2);
584	PUSHs (newSViv (PTR2IV (cctx)));
585	PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
586	PUTBACK;
587	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
588	SPAGAIN;
589	}
590
591	static void	621	static void
592	coro_run (void *arg)	622	coro_run (void *arg)
593	{	623	{
		624	dTHX;
		625
		626	/* coro_run is the alternative tail of transfer(), so unlock here. */
		627	UNLOCK;
		628
		629	PL_top_env = &PL_start_env;
		630
		631	/* inject a fake subroutine call to cctx_init */
		632	prepare_cctx (aTHX_ (coro_cctx *)arg);
		633
		634	/* somebody or something will hit me for both perl_run and PL_restartop */
		635	PL_restartop = PL_op;
		636	perl_run (PL_curinterp);
		637
594	/*	638	/*
595	* this is a _very_ stripped down perl interpreter ;)	639	* If perl-run returns we assume exit() was being called or the coro
		640	* fell off the end, which seems to be the only valid (non-bug)
		641	* reason for perl_run to return. We try to exit by jumping to the
		642	* bootstrap-time "top" top_env, as we cannot restore the "main"
		643	* coroutine as Coro has no such concept
596	*/	644	*/
597	UNLOCK;
598
599	PL_top_env = &PL_start_env;	645	PL_top_env = main_top_env;
600	prepare_cctx ((coro_stack *)arg);	646	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
601
602	/* somebody will hit me for both perl_run and PL_restartop */
603	perl_run (PERL_GET_CONTEXT);
604
605	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
606	abort ();
607	}	647	}
608		648
609	static coro_stack *	649	static coro_cctx *
610	stack_new ()	650	cctx_new ()
611	{	651	{
612	coro_stack *stack;	652	coro_cctx *cctx;
		653	void *stack_start;
		654	size_t stack_size;
613		655
		656	++cctx_count;
		657
614	New (0, stack, 1, coro_stack);	658	Newz (0, cctx, 1, coro_cctx);
615		659
616	#if HAVE_MMAP	660	#if HAVE_MMAP
617		661
618	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	662	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
619	/* mmap suppsedly does allocate-on-write for us */	663	/* mmap supposedly does allocate-on-write for us */
620	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	664	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
621		665
622	if (stack->sptr == (void *)-1)	666	if (cctx->sptr != (void *)-1)
623	{
624	perror ("FATAL: unable to mmap stack for coroutine");
625	_exit (EXIT_FAILURE);
626	}	667	{
627
628	# if STACKGUARD	668	# if CORO_STACKGUARD
629	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	669	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
630	# endif	670	# endif
631		671	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
632	#else	672	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
633		673	cctx->mapped = 1;
634	stack->ssize = STACKSIZE * (long)sizeof (long);
635	New (0, stack->sptr, STACKSIZE, long);
636
637	if (!stack->sptr)
638	{	674	}
		675	else
		676	#endif
		677	{
		678	cctx->ssize = coro_stacksize * (long)sizeof (long);
		679	New (0, cctx->sptr, coro_stacksize, long);
		680
		681	if (!cctx->sptr)
		682	{
639	perror (stderr, "FATAL: unable to malloc stack for coroutine");	683	perror ("FATAL: unable to allocate stack for coroutine");
640	_exit (EXIT_FAILURE);	684	_exit (EXIT_FAILURE);
641	}	685	}
642		686
643	#endif	687	stack_start = cctx->sptr;
		688	stack_size = cctx->ssize;
		689	}
644		690
		691	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
645	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	692	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
646		693
647	return stack;	694	return cctx;
648	}	695	}
649		696
650	static void	697	static void
651	stack_free (coro_stack *stack)	698	cctx_destroy (coro_cctx *cctx)
652	{	699	{
653	if (!stack)	700	if (!cctx)
654	return;	701	return;
655		702
		703	--cctx_count;
		704
		705	#if CORO_USE_VALGRIND
		706	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		707	#endif
		708
656	#if HAVE_MMAP	709	#if HAVE_MMAP
		710	if (cctx->mapped)
657	munmap (stack->sptr, stack->ssize);	711	munmap (cctx->sptr, cctx->ssize);
658	#else
659	Safefree (stack->sptr);
660	#endif
661
662	Safefree (stack);
663	}
664
665	static coro_stack *stack_first;
666
667	static coro_stack *
668	stack_get ()
669	{
670	coro_stack *stack;
671
672	if (stack_first)
673	{
674	stack = stack_first;
675	stack_first = stack->next;
676	}
677	else	712	else
		713	#endif
		714	Safefree (cctx->sptr);
		715
		716	Safefree (cctx);
		717	}
		718
		719	static coro_cctx *
		720	cctx_get (pTHX)
		721	{
		722	while (cctx_first)
678	{	723	{
679	stack = stack_new ();	724	coro_cctx *cctx = cctx_first;
		725	cctx_first = cctx->next;
		726	--cctx_idle;
		727
		728	if (cctx->ssize >= coro_stacksize)
		729	return cctx;
		730
		731	cctx_destroy (cctx);
		732	}
		733
680	PL_op = PL_op->op_next;	734	PL_op = PL_op->op_next;
		735	return cctx_new ();
		736	}
		737
		738	static void
		739	cctx_put (coro_cctx *cctx)
		740	{
		741	/* free another cctx if overlimit */
		742	if (cctx_idle >= MAX_IDLE_CCTX)
		743	{
		744	coro_cctx *first = cctx_first;
		745	cctx_first = first->next;
		746	--cctx_idle;
		747
		748	assert (!first->inuse);
		749	cctx_destroy (first);
681	}	750	}
682		751
683	return stack;	752	++cctx_idle;
		753	cctx->next = cctx_first;
		754	cctx_first = cctx;
684	}	755	}
685		756
686	static void	757	/** coroutine switching *****************************************************/
687	stack_put (coro_stack *stack)
688	{
689	stack->next = stack_first;
690	stack_first = stack;
691	}
692		758
693	/* never call directly, always through the coro_state_transfer global variable */	759	/* never call directly, always through the coro_state_transfer global variable */
694	static void	760	static void NOINLINE
695	transfer_impl (struct coro *prev, struct coro *next, int flags)	761	transfer (pTHX_ struct coro *prev, struct coro *next)
696	{	762	{
697	dSTACKLEVEL;	763	dSTACKLEVEL;
698		764
699	/* sometimes transfer is only called to set idle_sp */	765	/* sometimes transfer is only called to set idle_sp */
700	if (flags == TRANSFER_SET_STACKLEVEL)	766	if (!next)
		767	{
701	((coro_stack *)prev)->idle_sp = STACKLEVEL;	768	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		769	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		770	}
702	else if (prev != next)	771	else if (prev != next)
703	{	772	{
704	coro_stack *prev__stack;	773	coro_cctx *prev__cctx;
		774
		775	if (prev->flags & CF_NEW)
		776	{
		777	/* create a new empty context */
		778	Newz (0, prev->cctx, 1, coro_cctx);
		779	prev->cctx->inuse = 1;
		780	prev->flags &= ~CF_NEW;
		781	prev->flags |= CF_RUNNING;
		782	}
		783
		784	/*TODO: must not croak here */
		785	if (!prev->flags & CF_RUNNING)
		786	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		787
		788	if (next->flags & CF_RUNNING)
		789	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		790
		791	if (next->flags & CF_DESTROYED)
		792	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		793
		794	prev->flags &= ~CF_RUNNING;
		795	next->flags |= CF_RUNNING;
705		796
706	LOCK;	797	LOCK;
707		798
708	if (next->mainstack)	799	if (next->flags & CF_NEW)
709	{	800	{
710	/* coroutine already started */	801	/* need to start coroutine */
711	SAVE (prev, flags);	802	next->flags &= ~CF_NEW;
712	LOAD (next);	803	/* first get rid of the old state */
		804	save_perl (aTHX_ prev);
		805	/* setup coroutine call */
		806	setup_coro (aTHX_ next);
		807	/* need a new stack */
		808	assert (!next->cctx);
713	}	809	}
714	else	810	else
715	{	811	{
716	/* need to start coroutine */	812	/* coroutine already started */
717	/* first get rid of the old state */	813	save_perl (aTHX_ prev);
718	SAVE (prev, -1);	814	load_perl (aTHX_ next);
719	/* setup coroutine call */
720	setup_coro (next);
721	/* need a stack */
722	next->stack = 0;
723	}	815	}
724		816
725	if (!prev->stack)
726	/* create a new empty context */
727	Newz (0, prev->stack, 1, coro_stack);
728
729	prev__stack = prev->stack;	817	prev__cctx = prev->cctx;
730		818
731	/* possibly "free" the stack */	819	/* possibly "free" the cctx */
732	if (prev__stack->idle_sp == STACKLEVEL)	820	if (prev__cctx->idle_sp == STACKLEVEL)
733	{	821	{
734	stack_put (prev__stack);	822	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		823	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		824
735	prev->stack = 0;	825	prev->cctx = 0;
		826
		827	cctx_put (prev__cctx);
		828	prev__cctx->inuse = 0;
736	}	829	}
737		830
738	if (!next->stack)	831	if (!next->cctx)
739	next->stack = stack_get ();
740
741	if (prev__stack != next->stack)
742	{	832	{
743	prev__stack->top_env = PL_top_env;	833	next->cctx = cctx_get (aTHX);
744	PL_top_env = next->stack->top_env;	834	assert (!next->cctx->inuse);
745	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	835	next->cctx->inuse = 1;
746	}	836	}
747		837
		838	if (prev__cctx != next->cctx)
		839	{
		840	prev__cctx->top_env = PL_top_env;
		841	PL_top_env = next->cctx->top_env;
		842	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		843	}
		844
748	free_coro_mortal ();	845	free_coro_mortal (aTHX);
749
750	UNLOCK;	846	UNLOCK;
751	}	847	}
752	}	848	}
753		849
754	/* use this function pointer to call the above function */
755	/* this is done to increase chances of the compiler not inlining the call */
756	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
757	void (*coro_state_transfer)(struct coro *prev, struct coro *next, int flags) = transfer_impl;
758
759	struct transfer_args	850	struct transfer_args
760	{	851	{
761	struct coro *prev, *next;	852	struct coro *prev, *next;
762	int flags;
763	};	853	};
764		854
765	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	855	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
766		856
		857	/** high level stuff ********************************************************/
		858
767	static void	859	static int
768	coro_state_destroy (struct coro *coro)	860	coro_state_destroy (pTHX_ struct coro *coro)
769	{	861	{
770	if (coro->refcnt--)	862	if (coro->flags & CF_DESTROYED)
771	return;	863	return 0;
		864
		865	coro->flags |= CF_DESTROYED;
		866
		867	if (coro->flags & CF_READY)
		868	{
		869	/* reduce nready, as destroying a ready coro effectively unreadies it */
		870	/* alternative: look through all ready queues and remove the coro */
		871	LOCK;
		872	--coro_nready;
		873	UNLOCK;
		874	}
		875	else
		876	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
772		877
773	if (coro->mainstack && coro->mainstack != main_mainstack)	878	if (coro->mainstack && coro->mainstack != main_mainstack)
774	{	879	{
775	struct coro temp;	880	struct coro temp;
776		881
777	SAVE ((&temp), TRANSFER_SAVE_ALL);	882	assert (!(coro->flags & CF_RUNNING));
778	LOAD (coro);
779		883
		884	Zero (&temp, 1, struct coro);
		885	temp.save = CORO_SAVE_ALL;
		886
		887	if (coro->flags & CF_RUNNING)
		888	croak ("FATAL: tried to destroy currently running coroutine");
		889
		890	save_perl (aTHX_ &temp);
		891	load_perl (aTHX_ coro);
		892
780	destroy_stacks ();	893	coro_destroy_stacks (aTHX);
781		894
782	LOAD ((&temp)); /* this will get rid of defsv etc.. */	895	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
783		896
784	coro->mainstack = 0;	897	coro->mainstack = 0;
785	}	898	}
786		899
787	stack_free (coro->stack);	900	cctx_destroy (coro->cctx);
788	SvREFCNT_dec (coro->args);	901	SvREFCNT_dec (coro->args);
789	Safefree (coro);	902
		903	if (coro->next) coro->next->prev = coro->prev;
		904	if (coro->prev) coro->prev->next = coro->next;
		905	if (coro == first) first = coro->next;
		906
		907	return 1;
790	}	908	}
791		909
792	static int	910	static int
793	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	911	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
794	{	912	{
795	struct coro *coro = (struct coro *)mg->mg_ptr;	913	struct coro *coro = (struct coro *)mg->mg_ptr;
796	mg->mg_ptr = 0;	914	mg->mg_ptr = 0;
797		915
		916	coro->hv = 0;
		917
		918	if (--coro->refcnt < 0)
		919	{
798	coro_state_destroy (coro);	920	coro_state_destroy (aTHX_ coro);
		921	Safefree (coro);
		922	}
799		923
800	return 0;	924	return 0;
801	}	925	}
802		926
803	static int	927	static int
…		…
808	++coro->refcnt;	932	++coro->refcnt;
809		933
810	return 0;	934	return 0;
811	}	935	}
812		936
813	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	937	static MGVTBL coro_state_vtbl = {
		938	0, 0, 0, 0,
		939	coro_state_free,
		940	0,
		941	#ifdef MGf_DUP
		942	coro_state_dup,
		943	#else
		944	# define MGf_DUP 0
		945	#endif
		946	};
814		947
815	static struct coro *	948	static struct coro *
816	SvSTATE (SV *coro)	949	SvSTATE_ (pTHX_ SV *coro)
817	{	950	{
818	HV *stash;	951	HV *stash;
819	MAGIC *mg;	952	MAGIC *mg;
820		953
821	if (SvROK (coro))	954	if (SvROK (coro))
…		…
827	/* very slow, but rare, check */	960	/* very slow, but rare, check */
828	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	961	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
829	croak ("Coro::State object required");	962	croak ("Coro::State object required");
830	}	963	}
831		964
832	mg = SvMAGIC (coro);	965	mg = CORO_MAGIC (coro);
833	assert (mg->mg_type == PERL_MAGIC_ext);
834	return (struct coro *)mg->mg_ptr;	966	return (struct coro *)mg->mg_ptr;
835	}	967	}
836		968
		969	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		970
837	static void	971	static void
838	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	972	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
839	{	973	{
840	ta->prev = SvSTATE (prev);	974	ta->prev = SvSTATE (prev_sv);
841	ta->next = SvSTATE (next);	975	ta->next = SvSTATE (next_sv);
842	ta->flags = flags;
843	}	976	}
844		977
845	static void	978	static void
846	api_transfer (SV *prev, SV *next, int flags)	979	api_transfer (SV *prev_sv, SV *next_sv)
847	{	980	{
848	dTHX;	981	dTHX;
849	struct transfer_args ta;	982	struct transfer_args ta;
850		983
851	prepare_transfer (&ta, prev, next, flags);	984	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
852	TRANSFER (ta);	985	TRANSFER (ta);
853	}	986	}
854		987
		988	static int
		989	api_save (SV *coro_sv, int new_save)
		990	{
		991	dTHX;
		992	struct coro *coro = SvSTATE (coro_sv);
		993	int old_save = coro->save;
		994
		995	if (new_save >= 0)
		996	coro->save = new_save;
		997
		998	return old_save;
		999	}
		1000
855	/** Coro ********************************************************************/	1001	/** Coro ********************************************************************/
856		1002
857	#define PRIO_MAX 3
858	#define PRIO_HIGH 1
859	#define PRIO_NORMAL 0
860	#define PRIO_LOW -1
861	#define PRIO_IDLE -3
862	#define PRIO_MIN -4
863
864	/* for Coro.pm */
865	static GV *coro_current, *coro_idle;
866	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
867	static int coro_nready;
868
869	static void	1003	static void
870	coro_enq (SV *sv)	1004	coro_enq (pTHX_ SV *coro_sv)
871	{	1005	{
872	int prio;
873
874	if (SvTYPE (sv) != SVt_PVHV)
875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
876
877	prio = SvSTATE (sv)->prio;
878
879	av_push (coro_ready [prio - PRIO_MIN], sv);	1006	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
880	coro_nready++;
881	}	1007	}
882		1008
883	static SV *	1009	static SV *
884	coro_deq (int min_prio)	1010	coro_deq (pTHX_ int min_prio)
885	{	1011	{
886	int prio = PRIO_MAX - PRIO_MIN;	1012	int prio = PRIO_MAX - PRIO_MIN;
887		1013
888	min_prio -= PRIO_MIN;	1014	min_prio -= PRIO_MIN;
889	if (min_prio < 0)	1015	if (min_prio < 0)
890	min_prio = 0;	1016	min_prio = 0;
891		1017
892	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1018	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
893	if (AvFILLp (coro_ready [prio]) >= 0)	1019	if (AvFILLp (coro_ready [prio]) >= 0)
894	{
895	coro_nready--;
896	return av_shift (coro_ready [prio]);	1020	return av_shift (coro_ready [prio]);
897	}
898		1021
899	return 0;	1022	return 0;
900	}	1023	}
901		1024
902	static void	1025	static int
903	api_ready (SV *coro)	1026	api_ready (SV *coro_sv)
904	{	1027	{
905	dTHX;	1028	dTHX;
		1029	struct coro *coro;
906		1030
907	if (SvROK (coro))	1031	if (SvROK (coro_sv))
908	coro = SvRV (coro);	1032	coro_sv = SvRV (coro_sv);
		1033
		1034	coro = SvSTATE (coro_sv);
		1035
		1036	if (coro->flags & CF_READY)
		1037	return 0;
		1038
		1039	coro->flags |= CF_READY;
909		1040
910	LOCK;	1041	LOCK;
911	coro_enq (SvREFCNT_inc (coro));	1042	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1043	++coro_nready;
912	UNLOCK;	1044	UNLOCK;
913	}
914		1045
		1046	return 1;
		1047	}
		1048
915	static void	1049	static int
		1050	api_is_ready (SV *coro_sv)
		1051	{
		1052	dTHX;
		1053	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1054	}
		1055
		1056	static void
916	prepare_schedule (struct transfer_args *ta)	1057	prepare_schedule (pTHX_ struct transfer_args *ta)
917	{	1058	{
918	SV *current, *prev, *next;	1059	SV *prev_sv, *next_sv;
919
920	current = GvSV (coro_current);
921		1060
922	for (;;)	1061	for (;;)
923	{	1062	{
924	LOCK;	1063	LOCK;
925	next = coro_deq (PRIO_MIN);	1064	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1065
		1066	/* nothing to schedule: call the idle handler */
		1067	if (!next_sv)
		1068	{
		1069	dSP;
		1070	UNLOCK;
		1071
		1072	ENTER;
		1073	SAVETMPS;
		1074
		1075	PUSHMARK (SP);
		1076	PUTBACK;
		1077	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1078
		1079	FREETMPS;
		1080	LEAVE;
		1081	continue;
		1082	}
		1083
		1084	ta->next = SvSTATE (next_sv);
		1085
		1086	/* cannot transfer to destroyed coros, skip and look for next */
		1087	if (ta->next->flags & CF_DESTROYED)
		1088	{
		1089	UNLOCK;
		1090	SvREFCNT_dec (next_sv);
		1091	/* coro_nready is already taken care of by destroy */
		1092	continue;
		1093	}
		1094
		1095	--coro_nready;
926	UNLOCK;	1096	UNLOCK;
927
928	if (next)
929	break;	1097	break;
930
931	{
932	dSP;
933
934	ENTER;
935	SAVETMPS;
936
937	PUSHMARK (SP);
938	PUTBACK;
939	call_sv (GvSV (coro_idle), G_DISCARD);
940
941	FREETMPS;
942	LEAVE;
943	}	1098	}
944	}
945
946	prev = SvRV (current);
947	SvRV (current) = next;
948		1099
949	/* free this only after the transfer */	1100	/* free this only after the transfer */
		1101	prev_sv = SvRV (coro_current);
		1102	SvRV_set (coro_current, next_sv);
		1103	ta->prev = SvSTATE (prev_sv);
		1104
		1105	assert (ta->next->flags & CF_READY);
		1106	ta->next->flags &= ~CF_READY;
		1107
950	LOCK;	1108	LOCK;
951	free_coro_mortal ();	1109	free_coro_mortal (aTHX);
		1110	coro_mortal = prev_sv;
952	UNLOCK;	1111	UNLOCK;
953	coro_mortal = prev;
954
955	ta->prev = SvSTATE (prev);
956	ta->next = SvSTATE (next);
957	ta->flags = TRANSFER_SAVE_ALL;
958	}	1112	}
959		1113
960	static void	1114	static void
961	prepare_cede (struct transfer_args *ta)	1115	prepare_cede (pTHX_ struct transfer_args *ta)
962	{	1116	{
963	LOCK;	1117	api_ready (coro_current);
964	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
965	UNLOCK;
966
967	prepare_schedule (ta);	1118	prepare_schedule (aTHX_ ta);
		1119	}
		1120
		1121	static int
		1122	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1123	{
		1124	if (coro_nready)
		1125	{
		1126	SV *prev = SvRV (coro_current);
		1127	prepare_schedule (aTHX_ ta);
		1128	api_ready (prev);
		1129	return 1;
		1130	}
		1131	else
		1132	return 0;
968	}	1133	}
969		1134
970	static void	1135	static void
971	api_schedule (void)	1136	api_schedule (void)
972	{	1137	{
973	dTHX;	1138	dTHX;
974	struct transfer_args ta;	1139	struct transfer_args ta;
975		1140
976	prepare_schedule (&ta);	1141	prepare_schedule (aTHX_ &ta);
977	TRANSFER (ta);	1142	TRANSFER (ta);
978	}	1143	}
979		1144
980	static void	1145	static int
981	api_cede (void)	1146	api_cede (void)
982	{	1147	{
983	dTHX;	1148	dTHX;
984	struct transfer_args ta;	1149	struct transfer_args ta;
985		1150
986	prepare_cede (&ta);	1151	prepare_cede (aTHX_ &ta);
		1152
		1153	if (ta.prev != ta.next)
		1154	{
987	TRANSFER (ta);	1155	TRANSFER (ta);
		1156	return 1;
		1157	}
		1158	else
		1159	return 0;
		1160	}
		1161
		1162	static int
		1163	api_cede_notself (void)
		1164	{
		1165	dTHX;
		1166	struct transfer_args ta;
		1167
		1168	if (prepare_cede_notself (aTHX_ &ta))
		1169	{
		1170	TRANSFER (ta);
		1171	return 1;
		1172	}
		1173	else
		1174	return 0;
988	}	1175	}
989		1176
990	MODULE = Coro::State PACKAGE = Coro::State	1177	MODULE = Coro::State PACKAGE = Coro::State
991		1178
992	PROTOTYPES: DISABLE	1179	PROTOTYPES: DISABLE
…		…
998	#endif	1185	#endif
999	BOOT_PAGESIZE;	1186	BOOT_PAGESIZE;
1000		1187
1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1188	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002		1189
1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1190	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1191	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1192	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1193	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1194	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1195	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1196	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1006		1197
1007	main_mainstack = PL_mainstack;	1198	main_mainstack = PL_mainstack;
		1199	main_top_env = PL_top_env;
		1200
		1201	while (main_top_env->je_prev)
		1202	main_top_env = main_top_env->je_prev;
1008		1203
1009	coroapi.ver = CORO_API_VERSION;	1204	coroapi.ver = CORO_API_VERSION;
1010	coroapi.transfer = api_transfer;	1205	coroapi.transfer = api_transfer;
1011		1206
1012	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1207	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1020	HV *hv;	1215	HV *hv;
1021	int i;	1216	int i;
1022		1217
1023	Newz (0, coro, 1, struct coro);	1218	Newz (0, coro, 1, struct coro);
1024	coro->args = newAV ();	1219	coro->args = newAV ();
		1220	coro->save = CORO_SAVE_DEF;
		1221	coro->flags = CF_NEW;
1025		1222
		1223	if (first) first->prev = coro;
		1224	coro->next = first;
		1225	first = coro;
		1226
1026	hv = newHV ();	1227	coro->hv = hv = newHV ();
1027	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1228	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1028	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1229	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029		1230
1030	for (i = 1; i < items; i++)	1231	for (i = 1; i < items; i++)
1031	av_push (coro->args, newSVsv (ST (i)));	1232	av_push (coro->args, newSVsv (ST (i)));
1032
1033	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1034	/*coro->stack = 0;*/
1035	}	1233	}
1036	OUTPUT:	1234	OUTPUT:
		1235	RETVAL
		1236
		1237	int
		1238	save (SV *coro, int new_save = -1)
		1239	CODE:
		1240	RETVAL = api_save (coro, new_save);
		1241	OUTPUT:
		1242	RETVAL
		1243
		1244	int
		1245	save_also (SV *coro_sv, int save_also)
		1246	CODE:
		1247	{
		1248	struct coro *coro = SvSTATE (coro_sv);
		1249	RETVAL = coro->save;
		1250	coro->save |= save_also;
		1251	}
		1252	OUTPUT:
1037	RETVAL	1253	RETVAL
1038		1254
1039	void	1255	void
1040	_set_stacklevel (...)	1256	_set_stacklevel (...)
1041	ALIAS:	1257	ALIAS:
1042	Coro::State::transfer = 1	1258	Coro::State::transfer = 1
1043	Coro::schedule = 2	1259	Coro::schedule = 2
1044	Coro::cede = 3	1260	Coro::cede = 3
1045	Coro::Cont::yield = 4	1261	Coro::cede_notself = 4
1046	CODE:	1262	CODE:
1047	{	1263	{
1048	struct transfer_args ta;	1264	struct transfer_args ta;
1049		1265
1050	switch (ix)	1266	switch (ix)
1051	{	1267	{
1052	case 0:	1268	case 0:
1053	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1269	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1054	ta.next = 0;	1270	ta.next = 0;
1055	ta.flags = TRANSFER_SET_STACKLEVEL;
1056	break;	1271	break;
1057		1272
1058	case 1:	1273	case 1:
1059	if (items != 3)	1274	if (items != 2)
1060	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1275	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1061		1276
1062	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1277	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1063	break;	1278	break;
1064		1279
1065	case 2:	1280	case 2:
1066	prepare_schedule (&ta);	1281	prepare_schedule (aTHX_ &ta);
1067	break;	1282	break;
1068		1283
1069	case 3:	1284	case 3:
1070	prepare_cede (&ta);	1285	prepare_cede (aTHX_ &ta);
1071	break;	1286	break;
1072		1287
1073	case 4:	1288	case 4:
1074	{	1289	if (!prepare_cede_notself (aTHX_ &ta))
1075	SV *yieldstack;	1290	XSRETURN_EMPTY;
1076	SV *sv;
1077	AV *defav = GvAV (PL_defgv);
1078		1291
1079	yieldstack = *hv_fetch (
1080	(HV *)SvRV (GvSV (coro_current)),
1081	"yieldstack", sizeof ("yieldstack") - 1,
1082	0
1083	);
1084
1085	/* set up @_ -- ugly */
1086	av_clear (defav);
1087	av_fill (defav, items - 1);
1088	while (items--)
1089	av_store (defav, items, SvREFCNT_inc (ST(items)));
1090
1091	sv = av_pop ((AV *)SvRV (yieldstack));
1092	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1093	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1094	ta.flags = 0;
1095	SvREFCNT_dec (sv);
1096	}
1097	break;	1292	break;
1098
1099	}	1293	}
1100		1294
		1295	BARRIER;
1101	TRANSFER (ta);	1296	TRANSFER (ta);
1102	}
1103		1297
1104	void	1298	if (GIMME_V != G_VOID && ta.next != ta.prev)
1105	_clone_state_from (SV *dst, SV *src)	1299	XSRETURN_YES;
		1300	}
		1301
		1302	bool
		1303	_destroy (SV *coro_sv)
1106	CODE:	1304	CODE:
1107	{	1305	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1108	struct coro *coro_src = SvSTATE (src);	1306	OUTPUT:
1109		1307	RETVAL
1110	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1111
1112	++coro_src->refcnt;
1113	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1114	}
1115
1116	void
1117	_nonlocal_goto (IV nextop)
1118	CODE:
1119	/* uuh, somebody will kill me again for this */
1120	PL_op->op_next = INT2PTR (OP *, nextop);
1121		1308
1122	void	1309	void
1123	_exit (code)	1310	_exit (code)
1124	int code	1311	int code
1125	PROTOTYPE: $	1312	PROTOTYPE: $
1126	CODE:	1313	CODE:
1127	_exit (code);	1314	_exit (code);
1128		1315
		1316	int
		1317	cctx_stacksize (int new_stacksize = 0)
		1318	CODE:
		1319	RETVAL = coro_stacksize;
		1320	if (new_stacksize)
		1321	coro_stacksize = new_stacksize;
		1322	OUTPUT:
		1323	RETVAL
		1324
		1325	int
		1326	cctx_count ()
		1327	CODE:
		1328	RETVAL = cctx_count;
		1329	OUTPUT:
		1330	RETVAL
		1331
		1332	int
		1333	cctx_idle ()
		1334	CODE:
		1335	RETVAL = cctx_idle;
		1336	OUTPUT:
		1337	RETVAL
		1338
		1339	void
		1340	list ()
		1341	PPCODE:
		1342	{
		1343	struct coro *coro;
		1344	for (coro = first; coro; coro = coro->next)
		1345	if (coro->hv)
		1346	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1347	}
		1348
		1349	void
		1350	_eval (SV *coro_sv, SV *coderef)
		1351	CODE:
		1352	{
		1353	struct coro *coro = SvSTATE (coro_sv);
		1354	if (coro->mainstack)
		1355	{
		1356	struct coro temp;
		1357	Zero (&temp, 1, struct coro);
		1358	temp.save = CORO_SAVE_ALL;
		1359
		1360	if (!(coro->flags & CF_RUNNING))
		1361	{
		1362	save_perl (aTHX_ &temp);
		1363	load_perl (aTHX_ coro);
		1364	}
		1365
		1366	{
		1367	dSP;
		1368	ENTER;
		1369	SAVETMPS;
		1370	PUSHMARK (SP);
		1371	PUTBACK;
		1372	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1373	SPAGAIN;
		1374	FREETMPS;
		1375	LEAVE;
		1376	PUTBACK;
		1377	}
		1378
		1379	if (!(coro->flags & CF_RUNNING))
		1380	{
		1381	save_perl (aTHX_ coro);
		1382	load_perl (aTHX_ &temp);
		1383	}
		1384	}
		1385	}
		1386
		1387	SV *
		1388	is_ready (SV *coro_sv)
		1389	PROTOTYPE: $
		1390	ALIAS:
		1391	is_ready = CF_READY
		1392	is_running = CF_RUNNING
		1393	is_new = CF_NEW
		1394	is_destroyed = CF_DESTROYED
		1395	CODE:
		1396	struct coro *coro = SvSTATE (coro_sv);
		1397	RETVAL = boolSV (coro->flags & ix);
		1398	OUTPUT:
		1399	RETVAL
		1400
		1401
1129	MODULE = Coro::State PACKAGE = Coro	1402	MODULE = Coro::State PACKAGE = Coro
1130		1403
1131	BOOT:	1404	BOOT:
1132	{	1405	{
1133	int i;	1406	int i;
…		…
1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1412	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1413	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1414	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1415	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143		1416
1144	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1417	coro_current = get_sv ("Coro::current", FALSE);
1145	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1418	SvREADONLY_on (coro_current);
1146		1419
1147	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1420	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148	coro_ready[i] = newAV ();	1421	coro_ready[i] = newAV ();
1149		1422
1150	{	1423	{
1151	SV *sv = perl_get_sv("Coro::API", 1);	1424	SV *sv = perl_get_sv("Coro::API", 1);
1152		1425
1153	coroapi.schedule = api_schedule;	1426	coroapi.schedule = api_schedule;
		1427	coroapi.save = api_save;
1154	coroapi.cede = api_cede;	1428	coroapi.cede = api_cede;
		1429	coroapi.cede_notself = api_cede_notself;
1155	coroapi.ready = api_ready;	1430	coroapi.ready = api_ready;
		1431	coroapi.is_ready = api_is_ready;
1156	coroapi.nready = &coro_nready;	1432	coroapi.nready = &coro_nready;
1157	coroapi.current = coro_current;	1433	coroapi.current = coro_current;
1158		1434
1159	GCoroAPI = &coroapi;	1435	GCoroAPI = &coroapi;
1160	sv_setiv (sv, (IV)&coroapi);	1436	sv_setiv (sv, (IV)&coroapi);
1161	SvREADONLY_on (sv);	1437	SvREADONLY_on (sv);
1162	}	1438	}
1163	}	1439	}
		1440
		1441	void
		1442	_set_current (SV *current)
		1443	PROTOTYPE: $
		1444	CODE:
		1445	SvREFCNT_dec (SvRV (coro_current));
		1446	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1164		1447
1165	int	1448	int
1166	prio (Coro::State coro, int newprio = 0)	1449	prio (Coro::State coro, int newprio = 0)
1167	ALIAS:	1450	ALIAS:
1168	nice = 1	1451	nice = 1
…		…
1171	RETVAL = coro->prio;	1454	RETVAL = coro->prio;
1172		1455
1173	if (items > 1)	1456	if (items > 1)
1174	{	1457	{
1175	if (ix)	1458	if (ix)
1176	newprio += coro->prio;	1459	newprio = coro->prio - newprio;
1177		1460
1178	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1461	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1179	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1462	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1180		1463
1181	coro->prio = newprio;	1464	coro->prio = newprio;
1182	}	1465	}
1183	}	1466	}
		1467	OUTPUT:
		1468	RETVAL
1184		1469
1185	void	1470	SV *
1186	ready (SV *self)	1471	ready (SV *self)
1187	PROTOTYPE: $	1472	PROTOTYPE: $
1188	CODE:	1473	CODE:
1189	api_ready (self);	1474	RETVAL = boolSV (api_ready (self));
		1475	OUTPUT:
		1476	RETVAL
1190		1477
1191	int	1478	int
1192	nready (...)	1479	nready (...)
1193	PROTOTYPE:	1480	PROTOTYPE:
1194	CODE:	1481	CODE:
…		…
1200		1487
1201	SV *	1488	SV *
1202	_get_state ()	1489	_get_state ()
1203	CODE:	1490	CODE:
1204	{	1491	{
1205	struct {	1492	struct io_state *data;
1206	int errorno;
1207	int laststype;
1208	int laststatval;
1209	Stat_t statcache;
1210	} data;
1211		1493
		1494	RETVAL = newSV (sizeof (struct io_state));
		1495	data = (struct io_state *)SvPVX (RETVAL);
		1496	SvCUR_set (RETVAL, sizeof (struct io_state));
		1497	SvPOK_only (RETVAL);
		1498
1212	data.errorno = errno;	1499	data->errorno = errno;
1213	data.laststype = PL_laststype;	1500	data->laststype = PL_laststype;
1214	data.laststatval = PL_laststatval;	1501	data->laststatval = PL_laststatval;
1215	data.statcache = PL_statcache;	1502	data->statcache = PL_statcache;
1216
1217	RETVAL = newSVpvn ((char *)&data, sizeof data);
1218	}	1503	}
1219	OUTPUT:	1504	OUTPUT:
1220	RETVAL	1505	RETVAL
1221		1506
1222	void	1507	void
1223	_set_state (char *data_)	1508	_set_state (char *data_)
1224	PROTOTYPE: $	1509	PROTOTYPE: $
1225	CODE:	1510	CODE:
1226	{	1511	{
1227	struct {	1512	struct io_state *data = (void *)data_;
1228	int errorno;
1229	int laststype;
1230	int laststatval;
1231	Stat_t statcache;
1232	} *data = (void *)data_;
1233		1513
1234	errno = data->errorno;	1514	errno = data->errorno;
1235	PL_laststype = data->laststype;	1515	PL_laststype = data->laststype;
1236	PL_laststatval = data->laststatval;	1516	PL_laststatval = data->laststatval;
1237	PL_statcache = data->statcache;	1517	PL_statcache = data->statcache;
1238	}	1518	}
		1519

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