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Comparing Coro/Coro/State.xs (file contents):
Revision 1.40 by root, Tue Nov 27 01:41:41 2001 UTC vs.
Revision 1.141 by root, Mon Jan 22 18:45:17 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#include "EXTERN.h"	3	#include "EXTERN.h"
2	#include "perl.h"	4	#include "perl.h"
3	#include "XSUB.h"	5	#include "XSUB.h"
4		6
5	#include "libcoro/coro.c"	7	#include "patchlevel.h"
6		8
7	#include <signal.h>	9	#include <stdio.h>
		10	#include <errno.h>
		11	#include <assert.h>
8		12
9	#ifdef HAVE_MMAP	13	#ifdef HAVE_MMAP
10	# include <unistd.h>	14	# include <unistd.h>
11	# include <sys/mman.h>	15	# include <sys/mman.h>
12	# ifndef MAP_ANONYMOUS	16	# ifndef MAP_ANONYMOUS
…		…
14	# define MAP_ANONYMOUS MAP_ANON	18	# define MAP_ANONYMOUS MAP_ANON
15	# else	19	# else
16	# undef HAVE_MMAP	20	# undef HAVE_MMAP
17	# endif	21	# endif
18	# endif	22	# endif
		23	# include <limits.h>
		24	# ifndef PAGESIZE
		25	# define PAGESIZE pagesize
		26	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		27	static long pagesize;
		28	# else
		29	# define BOOT_PAGESIZE (void)0
19	#endif	30	# endif
		31	#else
		32	# define PAGESIZE 0
		33	# define BOOT_PAGESIZE (void)0
		34	#endif
20		35
21	#define MAY_FLUSH /* increases codesize and is rarely used */	36	#if USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		39	#else
		40	# define REGISTER_STACK(cctx,start,end)
		41	#endif
22		42
23	#define SUB_INIT "Coro::State::initialize"	43	/* the maximum number of idle cctx that will be pooled */
24	#define UCORO_STATE "_coro_state"	44	#define MAX_IDLE_CCTX 8
		45
		46	#define PERL_VERSION_ATLEAST(a,b,c) \
		47	(PERL_REVISION > (a) \
		48	|| (PERL_REVISION == (a) \
		49	&& (PERL_VERSION > (b) \
		50	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		51
		52	#if !PERL_VERSION_ATLEAST (5,6,0)
		53	# ifndef PL_ppaddr
		54	# define PL_ppaddr ppaddr
		55	# endif
		56	# ifndef call_sv
		57	# define call_sv perl_call_sv
		58	# endif
		59	# ifndef get_sv
		60	# define get_sv perl_get_sv
		61	# endif
		62	# ifndef get_cv
		63	# define get_cv perl_get_cv
		64	# endif
		65	# ifndef IS_PADGV
		66	# define IS_PADGV(v) 0
		67	# endif
		68	# ifndef IS_PADCONST
		69	# define IS_PADCONST(v) 0
		70	# endif
		71	#endif
		72
		73	/* 5.8.7 */
		74	#ifndef SvRV_set
		75	# define SvRV_set(s,v) SvRV(s) = (v)
		76	#endif
		77
		78	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		79	# undef STACKGUARD
		80	#endif
		81
		82	#ifndef STACKGUARD
		83	# define STACKGUARD 0
		84	#endif
		85
		86	/* prefer perl internal functions over our own? */
		87	#ifndef PREFER_PERL_FUNCTIONS
		88	# define PREFER_PERL_FUNCTIONS 0
		89	#endif
25		90
26	/* The next macro should declare a variable stacklevel that contains and approximation	91	/* The next macro should declare a variable stacklevel that contains and approximation
27	* to the current C stack pointer. Its property is that it changes with each call	92	* to the current C stack pointer. Its property is that it changes with each call
28	* and should be unique. */	93	* and should be unique. */
		94	#define dSTACKLEVEL int stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	95	#define STACKLEVEL ((void *)&stacklevel)
30		96
31	#define IN_DESTRUCT (PL_main_cv == Nullcv)	97	#define IN_DESTRUCT (PL_main_cv == Nullcv)
32		98
33	#define labs(l) ((l) >= 0 ? (l) : -(l))	99	#if __GNUC__ >= 3
		100	# define attribute(x) __attribute__(x)
		101	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		102	#else
		103	# define attribute(x)
		104	# define BARRIER
		105	#endif
		106
		107	#define NOINLINE attribute ((noinline))
34		108
35	#include "CoroAPI.h"	109	#include "CoroAPI.h"
36		110
		111	#ifdef USE_ITHREADS
		112	static perl_mutex coro_mutex;
		113	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		114	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		115	#else
		116	# define LOCK (void)0
		117	# define UNLOCK (void)0
		118	#endif
		119
		120	/* helper storage struct for Coro::AIO */
		121	struct io_state
		122	{
		123	int errorno;
		124	I32 laststype;
		125	int laststatval;
		126	Stat_t statcache;
		127	};
		128
37	static struct CoroAPI coroapi;	129	static struct CoroAPI coroapi;
		130	static AV *main_mainstack; /* used to differentiate between $main and others */
		131	static HV *coro_state_stash, *coro_stash;
		132	static SV *coro_mortal; /* will be freed after next transfer */
38		133
39	/* this is actually not only the c stack but also c registers etc... */	134	static struct coro_cctx *cctx_first;
		135	static int cctx_count, cctx_idle;
		136
		137	/* this is a structure representing a c-level coroutine */
40	typedef struct {	138	typedef struct coro_cctx {
41	int refcnt; /* pointer reference counter */	139	struct coro_cctx *next;
42	int usecnt; /* shared by how many coroutines */
43	int gencnt; /* generation counter */
44		140
		141	/* the stack */
		142	void *sptr;
		143	ssize_t ssize; /* positive == mmap, otherwise malloc */
		144
		145	/* cpu state */
		146	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		147	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		148	JMPENV *top_env;
45	coro_context cctx;	149	coro_context cctx;
46		150
47	void *sptr;	151	int inuse;
48	long ssize; /* positive == mmap, otherwise malloc */
49	} coro_stack;
50		152
		153	#if USE_VALGRIND
		154	int valgrind_id;
		155	#endif
		156	} coro_cctx;
		157
		158	enum {
		159	CF_RUNNING = 0x0001, /* coroutine is running */
		160	CF_READY = 0x0002, /* coroutine is ready */
		161	CF_NEW = 0x0004, /* has never been switched to */
		162	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		163	};
		164
		165	/* this is a structure representing a perl-level coroutine */
51	struct coro {	166	struct coro {
52	/* the optional C context */	167	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	168	coro_cctx *cctx;
54	void *cursp;
55	int gencnt;
56
57	/* optionally saved, might be zero */
58	AV *defav;
59	SV *defsv;
60	SV *errsv;
61
62	/* saved global state not related to stacks */
63	U8 dowarn;
64	I32 in_eval;
65
66	/* the stacks and related info (callchain etc..) */
67	PERL_SI *curstackinfo;
68	AV *curstack;
69	AV *mainstack;
70	SV **stack_sp;
71	OP *op;
72	SV **curpad;
73	SV **stack_base;
74	SV **stack_max;
75	SV **tmps_stack;
76	I32 tmps_floor;
77	I32 tmps_ix;
78	I32 tmps_max;
79	I32 *markstack;
80	I32 *markstack_ptr;
81	I32 *markstack_max;
82	I32 *scopestack;
83	I32 scopestack_ix;
84	I32 scopestack_max;
85	ANY *savestack;
86	I32 savestack_ix;
87	I32 savestack_max;
88	OP **retstack;
89	I32 retstack_ix;
90	I32 retstack_max;
91	COP *curcop;
92	PMOP *curpm;
93	JMPENV *top_env;
94		169
95	/* data associated with this coroutine (initial args) */	170	/* data associated with this coroutine (initial args) */
96	AV *args;	171	AV *args;
		172	int refcnt;
		173	int save; /* CORO_SAVE flags */
		174	int flags; /* CF_ flags */
		175
		176	/* optionally saved, might be zero */
		177	AV *defav; /* @_ */
		178	SV *defsv; /* $_ */
		179	SV *errsv; /* $@ */
		180	SV *irssv; /* $/ */
		181	SV *irssv_sv; /* real $/ cache */
		182
		183	#define VAR(name,type) type name;
		184	# include "state.h"
		185	#undef VAR
		186
		187	/* coro process data */
		188	int prio;
97	};	189	};
98		190
99	typedef struct coro *Coro__State;	191	typedef struct coro *Coro__State;
100	typedef struct coro *Coro__State_or_hashref;	192	typedef struct coro *Coro__State_or_hashref;
101		193
102	static AV *main_mainstack; /* used to differentiate between $main and others */	194	/** Coro ********************************************************************/
103	static HV *coro_state_stash;
104	static SV *ucoro_state_sv;
105	static U32 ucoro_state_hash;
106	static HV *padlist_cache;
107	static SV *coro_mortal; /* will be freed after next transfer */
108		195
109	/* mostly copied from op.c:cv_clone2 */	196	#define PRIO_MAX 3
110	STATIC AV *	197	#define PRIO_HIGH 1
111	clone_padlist (AV *protopadlist)	198	#define PRIO_NORMAL 0
		199	#define PRIO_LOW -1
		200	#define PRIO_IDLE -3
		201	#define PRIO_MIN -4
		202
		203	/* for Coro.pm */
		204	static SV *coro_current;
		205	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		206	static int coro_nready;
		207
		208	/** lowlevel stuff **********************************************************/
		209
		210	static AV *
		211	coro_clone_padlist (CV *cv)
112	{	212	{
113	AV *av;	213	AV *padlist = CvPADLIST (cv);
114	I32 ix;
115	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
116	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
117	SV **pname = AvARRAY (protopad_name);
118	SV **ppad = AvARRAY (protopad);
119	I32 fname = AvFILLp (protopad_name);
120	I32 fpad = AvFILLp (protopad);
121	AV *newpadlist, *newpad_name, *newpad;	214	AV *newpadlist, *newpad;
122	SV **npad;
123
124	newpad_name = newAV ();
125	for (ix = fname; ix >= 0; ix--)
126	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
127
128	newpad = newAV ();
129	av_fill (newpad, AvFILLp (protopad));
130	npad = AvARRAY (newpad);
131		215
132	newpadlist = newAV ();	216	newpadlist = newAV ();
133	AvREAL_off (newpadlist);	217	AvREAL_off (newpadlist);
134	av_store (newpadlist, 0, (SV *) newpad_name);	218	#if PERL_VERSION_ATLEAST (5,9,0)
		219	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		220	#else
		221	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		222	#endif
		223	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		224	--AvFILLp (padlist);
		225
		226	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
135	av_store (newpadlist, 1, (SV *) newpad);	227	av_store (newpadlist, 1, (SV *)newpad);
136		228
137	av = newAV (); /* will be @_ */	229	return newpadlist;
138	av_extend (av, 0);	230	}
139	av_store (newpad, 0, (SV *) av);
140	AvFLAGS (av) = AVf_REIFY;
141		231
142	for (ix = fpad; ix > 0; ix--)	232	static void
		233	free_padlist (AV *padlist)
		234	{
		235	/* may be during global destruction */
		236	if (SvREFCNT (padlist))
143	{	237	{
144	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	238	I32 i = AvFILLp (padlist);
145	if (namesv && namesv != &PL_sv_undef)	239	while (i >= 0)
146	{	240	{
147	char *name = SvPVX (namesv); /* XXX */	241	SV **svp = av_fetch (padlist, i--, FALSE);
148	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	242	if (svp)
149	{ /* lexical from outside? */
150	npad[ix] = SvREFCNT_inc (ppad[ix]);
151	}	243	{
152	else
153	{ /* our own lexical */
154	SV *sv;	244	SV *sv;
155	if (*name == '&')	245	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
156	sv = SvREFCNT_inc (ppad[ix]);	246	SvREFCNT_dec (sv);
157	else if (*name == '@')	247
158	sv = (SV *) newAV ();	248	SvREFCNT_dec (*svp);
159	else if (*name == '%')
160	sv = (SV *) newHV ();
161	else
162	sv = NEWSV (0, 0);
163	if (!SvPADBUSY (sv))
164	SvPADMY_on (sv);
165	npad[ix] = sv;
166	}	249	}
167	}	250	}
168	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
169	{
170	npad[ix] = SvREFCNT_inc (ppad[ix]);
171	}
172	else
173	{
174	SV *sv = NEWSV (0, 0);
175	SvPADTMP_on (sv);
176	npad[ix] = sv;
177	}
178	}
179		251
180	#if 0 /* return -ENOTUNDERSTOOD */
181	/* Now that vars are all in place, clone nested closures. */
182
183	for (ix = fpad; ix > 0; ix--) {
184	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
185	if (namesv
186	&& namesv != &PL_sv_undef
187	&& !(SvFLAGS(namesv) & SVf_FAKE)
188	&& *SvPVX(namesv) == '&'
189	&& CvCLONE(ppad[ix]))
190	{
191	CV *kid = cv_clone((CV*)ppad[ix]);
192	SvREFCNT_dec(ppad[ix]);
193	CvCLONE_on(kid);
194	SvPADMY_on(kid);
195	npad[ix] = (SV*)kid;
196	}
197	}
198	#endif
199
200	return newpadlist;
201	}
202
203	#ifdef MAY_FLUSH
204	STATIC void
205	free_padlist (AV *padlist)
206	{
207	/* may be during global destruction */
208	if (SvREFCNT(padlist))
209	{
210	I32 i = AvFILLp(padlist);
211	while (i >= 0)
212	{
213	SV **svp = av_fetch(padlist, i--, FALSE);
214	SV *sv = svp ? *svp : Nullsv;
215	if (sv)
216	SvREFCNT_dec(sv);
217	}
218
219	SvREFCNT_dec((SV*)padlist);	252	SvREFCNT_dec ((SV*)padlist);
220	}	253	}
221	}	254	}
222	#endif	255
		256	static int
		257	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		258	{
		259	AV *padlist;
		260	AV *av = (AV *)mg->mg_obj;
		261
		262	/* casting is fun. */
		263	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
		264	free_padlist (padlist);
		265
		266	SvREFCNT_dec (av);
		267
		268	return 0;
		269	}
		270
		271	#define PERL_MAGIC_coro PERL_MAGIC_ext
		272
		273	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		274
		275	#define CORO_MAGIC(cv) \
		276	SvMAGIC (cv) \
		277	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		278	? SvMAGIC (cv) \
		279	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		280	: 0
223		281
224	/* the next two functions merely cache the padlists */	282	/* the next two functions merely cache the padlists */
225	STATIC void	283	static void
226	get_padlist (CV *cv)	284	get_padlist (CV *cv)
227	{	285	{
228	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);	286	MAGIC *mg = CORO_MAGIC (cv);
		287	AV *av;
229		288
230	if (he && AvFILLp ((AV *)*he) >= 0)	289	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
231	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);	290	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
232	else	291	else
		292	{
		293	#if PREFER_PERL_FUNCTIONS
		294	/* this is probably cleaner, but also slower? */
		295	CV *cp = Perl_cv_clone (cv);
		296	CvPADLIST (cv) = CvPADLIST (cp);
		297	CvPADLIST (cp) = 0;
		298	SvREFCNT_dec (cp);
		299	#else
233	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	300	CvPADLIST (cv) = coro_clone_padlist (cv);
		301	#endif
		302	}
234	}	303	}
235		304
236	STATIC void	305	static void
237	put_padlist (CV *cv)	306	put_padlist (CV *cv)
238	{	307	{
239	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);	308	MAGIC *mg = CORO_MAGIC (cv);
		309	AV *av;
240		310
241	if (SvTYPE (*he) != SVt_PVAV)	311	if (!mg)
242	{
243	SvREFCNT_dec (*he);
244	*he = (SV *)newAV ();
245	}	312	{
246		313	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
247	av_push ((AV *)*he, (SV *)CvPADLIST (cv));	314	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
248	}	315	mg->mg_virtual = &vtbl_coro;
249		316	mg->mg_obj = (SV *)newAV ();
250	#ifdef MAY_FLUSH
251	STATIC void
252	flush_padlist_cache ()
253	{
254	HV *hv = padlist_cache;
255	padlist_cache = newHV ();
256
257	if (hv_iterinit (hv))
258	{	317	}
259	HE *he;
260	AV *padlist;
261		318
262	while (!!(he = hv_iternext (hv)))	319	av = (AV *)mg->mg_obj;
263	{
264	AV *av = (AV *)HeVAL(he);
265		320
266	/* casting is fun. */	321	if (AvFILLp (av) >= AvMAX (av))
267	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	322	av_extend (av, AvMAX (av) + 1);
268	free_padlist (padlist);
269	}
270	}
271		323
272	SvREFCNT_dec (hv);	324	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
273	}	325	}
274	#endif	326
		327	/** load & save, init *******************************************************/
275		328
276	#define SB do {	329	#define SB do {
277	#define SE } while (0)	330	#define SE } while (0)
278		331
279	#define LOAD(state) load_state(aTHX_ (state));
280	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
281
282	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	332	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
283		333
284	static void	334	static void
285	load_state(pTHX_ Coro__State c)	335	load_perl (Coro__State c)
286	{	336	{
287	PL_dowarn = c->dowarn;	337	#define VAR(name,type) PL_ ## name = c->name;
288	PL_in_eval = c->in_eval;	338	# include "state.h"
289		339	#undef VAR
290	PL_curstackinfo = c->curstackinfo;
291	PL_curstack = c->curstack;
292	PL_mainstack = c->mainstack;
293	PL_stack_sp = c->stack_sp;
294	PL_op = c->op;
295	PL_curpad = c->curpad;
296	PL_stack_base = c->stack_base;
297	PL_stack_max = c->stack_max;
298	PL_tmps_stack = c->tmps_stack;
299	PL_tmps_floor = c->tmps_floor;
300	PL_tmps_ix = c->tmps_ix;
301	PL_tmps_max = c->tmps_max;
302	PL_markstack = c->markstack;
303	PL_markstack_ptr = c->markstack_ptr;
304	PL_markstack_max = c->markstack_max;
305	PL_scopestack = c->scopestack;
306	PL_scopestack_ix = c->scopestack_ix;
307	PL_scopestack_max = c->scopestack_max;
308	PL_savestack = c->savestack;
309	PL_savestack_ix = c->savestack_ix;
310	PL_savestack_max = c->savestack_max;
311	PL_retstack = c->retstack;
312	PL_retstack_ix = c->retstack_ix;
313	PL_retstack_max = c->retstack_max;
314	PL_curcop = c->curcop;
315	PL_top_env = c->top_env;
316		340
317	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	341	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
318	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	342	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
319	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	343	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		344	if (c->irssv)
		345	{
		346	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		347	SvREFCNT_dec (c->irssv);
		348	else
		349	{
		350	REPLACE_SV (PL_rs, c->irssv);
		351	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		352	sv_setsv (c->irssv_sv, PL_rs);
		353	}
		354	}
320		355
321	{	356	{
322	dSP;	357	dSP;
323	CV *cv;	358	CV *cv;
324		359
325	/* now do the ugly restore mess */	360	/* now do the ugly restore mess */
326	while ((cv = (CV *)POPs))	361	while ((cv = (CV *)POPs))
327	{	362	{
328	AV *padlist = (AV *)POPs;
329
330	if (padlist)
331	{
332	put_padlist (cv); /* mark this padlist as available */	363	put_padlist (cv); /* mark this padlist as available */
333	CvPADLIST(cv) = padlist;	364	CvDEPTH (cv) = PTR2IV (POPs);
334	#ifdef USE_THREADS	365	CvPADLIST (cv) = (AV *)POPs;
335	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
336	#endif
337	}
338
339	++CvDEPTH(cv);
340	}	366	}
341		367
342	PUTBACK;	368	PUTBACK;
343	}	369	}
344	}	370	}
345		371
346	static void	372	static void
347	save_state(pTHX_ Coro__State c, int flags)	373	save_perl (Coro__State c)
348	{	374	{
349	{	375	{
350	dSP;	376	dSP;
351	I32 cxix = cxstack_ix;	377	I32 cxix = cxstack_ix;
352	PERL_CONTEXT *ccstk = cxstack;	378	PERL_CONTEXT *ccstk = cxstack;
…		…
355	/*	381	/*
356	* the worst thing you can imagine happens first - we have to save	382	* the worst thing you can imagine happens first - we have to save
357	* (and reinitialize) all cv's in the whole callchain :(	383	* (and reinitialize) all cv's in the whole callchain :(
358	*/	384	*/
359		385
		386	EXTEND (SP, 3 + 1);
360	PUSHs (Nullsv);	387	PUSHs (Nullsv);
361	/* this loop was inspired by pp_caller */	388	/* this loop was inspired by pp_caller */
362	for (;;)	389	for (;;)
363	{	390	{
364	while (cxix >= 0)	391	while (cxix >= 0)
365	{	392	{
366	PERL_CONTEXT *cx = &ccstk[cxix--];	393	PERL_CONTEXT *cx = &ccstk[cxix--];
367		394
368	if (CxTYPE(cx) == CXt_SUB)	395	if (CxTYPE (cx) == CXt_SUB)
369	{	396	{
370	CV *cv = cx->blk_sub.cv;	397	CV *cv = cx->blk_sub.cv;
		398
371	if (CvDEPTH(cv))	399	if (CvDEPTH (cv))
372	{	400	{
373	#ifdef USE_THREADS
374	/*XPUSHs ((SV *)CvOWNER(cv));*/
375	/*CvOWNER(cv) = 0;*/
376	/*error must unlock this cv etc.. etc...*/
377	#endif
378	EXTEND (SP, CvDEPTH(cv)*2);	401	EXTEND (SP, 3);
379
380	while (--CvDEPTH(cv))
381	{
382	/* this tells the restore code to increment CvDEPTH */
383	PUSHs (Nullsv);
384	PUSHs ((SV *)cv);
385	}
386
387	PUSHs ((SV *)CvPADLIST(cv));	402	PUSHs ((SV *)CvPADLIST (cv));
		403	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
388	PUSHs ((SV *)cv);	404	PUSHs ((SV *)cv);
389		405
		406	CvDEPTH (cv) = 0;
390	get_padlist (cv); /* this is a monster */	407	get_padlist (cv);
391	}	408	}
392	}
393	else if (CxTYPE(cx) == CXt_FORMAT)
394	{
395	/* I never used formats, so how should I know how these are implemented? */
396	/* my bold guess is as a simple, plain sub... */
397	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
398	}	409	}
399	}	410	}
400		411
401	if (top_si->si_type == PERLSI_MAIN)	412	if (top_si->si_type == PERLSI_MAIN)
402	break;	413	break;
…		…
407	}	418	}
408		419
409	PUTBACK;	420	PUTBACK;
410	}	421	}
411		422
412	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	423	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
413	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	424	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
414	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	425	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		426	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
415		427
416	c->dowarn = PL_dowarn;	428	#define VAR(name,type)c->name = PL_ ## name;
417	c->in_eval = PL_in_eval;	429	# include "state.h"
418		430	#undef VAR
419	c->curstackinfo = PL_curstackinfo;
420	c->curstack = PL_curstack;
421	c->mainstack = PL_mainstack;
422	c->stack_sp = PL_stack_sp;
423	c->op = PL_op;
424	c->curpad = PL_curpad;
425	c->stack_base = PL_stack_base;
426	c->stack_max = PL_stack_max;
427	c->tmps_stack = PL_tmps_stack;
428	c->tmps_floor = PL_tmps_floor;
429	c->tmps_ix = PL_tmps_ix;
430	c->tmps_max = PL_tmps_max;
431	c->markstack = PL_markstack;
432	c->markstack_ptr = PL_markstack_ptr;
433	c->markstack_max = PL_markstack_max;
434	c->scopestack = PL_scopestack;
435	c->scopestack_ix = PL_scopestack_ix;
436	c->scopestack_max = PL_scopestack_max;
437	c->savestack = PL_savestack;
438	c->savestack_ix = PL_savestack_ix;
439	c->savestack_max = PL_savestack_max;
440	c->retstack = PL_retstack;
441	c->retstack_ix = PL_retstack_ix;
442	c->retstack_max = PL_retstack_max;
443	c->curcop = PL_curcop;
444	c->top_env = PL_top_env;
445	}	431	}
446		432
447	/*	433	/*
448	* allocate various perl stacks. This is an exact copy	434	* allocate various perl stacks. This is an exact copy
449	* of perl.c:init_stacks, except that it uses less memory	435	* of perl.c:init_stacks, except that it uses less memory
450	* on the assumption that coroutines do not usually need	436	* on the (sometimes correct) assumption that coroutines do
451	* a lot of stackspace.	437	* not usually need a lot of stackspace.
452	*/	438	*/
453	STATIC void	439	#if PREFER_PERL_FUNCTIONS
		440	# define coro_init_stacks init_stacks
		441	#else
		442	static void
454	coro_init_stacks (pTHX)	443	coro_init_stacks ()
455	{	444	{
456	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	445	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
457	PL_curstackinfo->si_type = PERLSI_MAIN;	446	PL_curstackinfo->si_type = PERLSI_MAIN;
458	PL_curstack = PL_curstackinfo->si_stack;	447	PL_curstack = PL_curstackinfo->si_stack;
459	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	448	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
460		449
461	PL_stack_base = AvARRAY(PL_curstack);	450	PL_stack_base = AvARRAY(PL_curstack);
462	PL_stack_sp = PL_stack_base;	451	PL_stack_sp = PL_stack_base;
463	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	452	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
464		453
465	New(50,PL_tmps_stack,96,SV*);	454	New(50,PL_tmps_stack,128,SV*);
466	PL_tmps_floor = -1;	455	PL_tmps_floor = -1;
467	PL_tmps_ix = -1;	456	PL_tmps_ix = -1;
468	PL_tmps_max = 96;	457	PL_tmps_max = 128;
469		458
470	New(54,PL_markstack,16,I32);	459	New(54,PL_markstack,32,I32);
471	PL_markstack_ptr = PL_markstack;	460	PL_markstack_ptr = PL_markstack;
472	PL_markstack_max = PL_markstack + 16;	461	PL_markstack_max = PL_markstack + 32;
473		462
		463	#ifdef SET_MARK_OFFSET
474	SET_MARK_OFFSET;	464	SET_MARK_OFFSET;
		465	#endif
475		466
476	New(54,PL_scopestack,16,I32);	467	New(54,PL_scopestack,32,I32);
477	PL_scopestack_ix = 0;	468	PL_scopestack_ix = 0;
478	PL_scopestack_max = 16;	469	PL_scopestack_max = 32;
479		470
480	New(54,PL_savestack,96,ANY);	471	New(54,PL_savestack,64,ANY);
481	PL_savestack_ix = 0;	472	PL_savestack_ix = 0;
482	PL_savestack_max = 96;	473	PL_savestack_max = 64;
483		474
		475	#if !PERL_VERSION_ATLEAST (5,9,0)
484	New(54,PL_retstack,8,OP*);	476	New(54,PL_retstack,16,OP*);
485	PL_retstack_ix = 0;	477	PL_retstack_ix = 0;
486	PL_retstack_max = 8;	478	PL_retstack_max = 16;
		479	#endif
487	}	480	}
		481	#endif
488		482
489	/*	483	/*
490	* destroy the stacks, the callchain etc...	484	* destroy the stacks, the callchain etc...
491	* still there is a memleak of 128 bytes...
492	*/	485	*/
493	STATIC void	486	static void
494	destroy_stacks(pTHX)	487	coro_destroy_stacks ()
495	{	488	{
496	if (!IN_DESTRUCT)	489	if (!IN_DESTRUCT)
497	{	490	{
498	/* is this ugly, I ask? */	491	/* restore all saved variables and stuff */
499	while (PL_scopestack_ix)	492	LEAVE_SCOPE (0);
500	LEAVE;	493	assert (PL_tmps_floor == -1);
501		494
502	/* sure it is, but more important: is it correct?? :/ */	495	/* free all temporaries */
503	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504	FREETMPS;	496	FREETMPS;
		497	assert (PL_tmps_ix == -1);
		498
		499	/* unwind all extra stacks */
		500	POPSTACK_TO (PL_mainstack);
		501
		502	/* unwind main stack */
		503	dounwind (-1);
505	}	504	}
506		505
507	while (PL_curstackinfo->si_next)	506	while (PL_curstackinfo->si_next)
508	PL_curstackinfo = PL_curstackinfo->si_next;	507	PL_curstackinfo = PL_curstackinfo->si_next;
509		508
510	while (PL_curstackinfo)	509	while (PL_curstackinfo)
511	{	510	{
512	PERL_SI *p = PL_curstackinfo->si_prev;	511	PERL_SI *p = PL_curstackinfo->si_prev;
513		512
514	{
515	dSP;
516	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
517	PUTBACK; /* possibly superfluous */
518	}
519
520	if (!IN_DESTRUCT)	513	if (!IN_DESTRUCT)
521	{
522	dounwind(-1);
523	SvREFCNT_dec(PL_curstackinfo->si_stack);	514	SvREFCNT_dec (PL_curstackinfo->si_stack);
524	}
525		515
526	Safefree(PL_curstackinfo->si_cxstack);	516	Safefree (PL_curstackinfo->si_cxstack);
527	Safefree(PL_curstackinfo);	517	Safefree (PL_curstackinfo);
528	PL_curstackinfo = p;	518	PL_curstackinfo = p;
529	}	519	}
530		520
531	Safefree(PL_tmps_stack);	521	Safefree (PL_tmps_stack);
532	Safefree(PL_markstack);	522	Safefree (PL_markstack);
533	Safefree(PL_scopestack);	523	Safefree (PL_scopestack);
534	Safefree(PL_savestack);	524	Safefree (PL_savestack);
		525	#if !PERL_VERSION_ATLEAST (5,9,0)
535	Safefree(PL_retstack);	526	Safefree (PL_retstack);
536	}
537
538	static void
539	allocate_stack (Coro__State ctx, int alloc)
540	{
541	coro_stack *stack;
542
543	New (0, stack, 1, coro_stack);
544
545	stack->refcnt = 1;
546	stack->usecnt = 1;
547	stack->gencnt = ctx->gencnt = 0;
548	if (alloc)
549	{
550	#if HAVE_MMAP
551	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
552	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
553	if (stack->sptr == (void *)-1)
554	#endif	527	#endif
555	{
556	/*FIXME*//*D*//* reasonable stack size! */
557	stack->ssize = -4096 * sizeof (long);
558	New (0, stack->sptr, 4096, long);
559	}
560	}
561	else
562	stack->sptr = 0;
563
564	ctx->stack = stack;
565	}	528	}
566		529
567	static void	530	/** coroutine stack handling ************************************************/
568	deallocate_stack (Coro__State ctx)
569	{
570	coro_stack *stack = ctx->stack;
571		531
572	ctx->stack = 0;
573
574	if (stack)
575	{
576	if (!--stack->refcnt)
577	{
578	#ifdef HAVE_MMAP
579	if (stack->ssize > 0 && stack->sptr)
580	munmap (stack->sptr, stack->ssize);
581	else
582	#else
583	Safefree (stack->sptr);
584	#endif
585	Safefree (stack);
586	}
587	else if (ctx->gencnt == stack->gencnt)
588	--stack->usecnt;
589	}
590	}
591
592	static void	532	static void
593	setup_coro (void *arg)	533	setup_coro (struct coro *coro)
594	{	534	{
595	/*	535	/*
596	* emulate part of the perl startup here.	536	* emulate part of the perl startup here.
597	*/	537	*/
		538
		539	coro_init_stacks ();
		540
		541	PL_curcop = &PL_compiling;
		542	PL_in_eval = EVAL_NULL;
		543	PL_curpm = 0;
		544	PL_localizing = 0;
		545	PL_dirty = 0;
		546	PL_restartop = 0;
		547
		548	{
		549	dSP;
		550	LOGOP myop;
		551
		552	SvREFCNT_dec (GvAV (PL_defgv));
		553	GvAV (PL_defgv) = coro->args; coro->args = 0;
		554
		555	Zero (&myop, 1, LOGOP);
		556	myop.op_next = Nullop;
		557	myop.op_flags = OPf_WANT_VOID;
		558
		559	PUSHMARK (SP);
		560	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		561	PUTBACK;
		562	PL_op = (OP *)&myop;
		563	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		564	SPAGAIN;
		565	}
		566
		567	ENTER; /* necessary e.g. for dounwind */
		568	}
		569
		570	static void
		571	free_coro_mortal ()
		572	{
		573	if (coro_mortal)
		574	{
		575	SvREFCNT_dec (coro_mortal);
		576	coro_mortal = 0;
		577	}
		578	}
		579
		580	/* inject a fake call to Coro::State::_cctx_init into the execution */
		581	static void NOINLINE
		582	prepare_cctx (coro_cctx *cctx)
		583	{
598	dSP;	584	dSP;
599	Coro__State ctx = (Coro__State)arg;	585	LOGOP myop;
600	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
601		586
602	coro_init_stacks (aTHX);	587	Zero (&myop, 1, LOGOP);
603	PL_curpm = 0; /* segfault on first access */	588	myop.op_next = PL_op;
604	/*PL_curcop = 0;*/	589	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
605	/*PL_in_eval = PL_in_eval;*/ /* inherit */
606	SvREFCNT_dec (GvAV (PL_defgv));
607	GvAV (PL_defgv) = ctx->args;
608		590
		591	PUSHMARK (SP);
		592	EXTEND (SP, 2);
		593	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		594	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		595	PUTBACK;
		596	PL_op = (OP *)&myop;
		597	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
609	SPAGAIN;	598	SPAGAIN;
610
611	if (ctx->stack)
612	{
613	ctx->cursp = 0;
614
615	PUSHMARK(SP);
616	PUTBACK;
617	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
618
619	if (SvTRUE (ERRSV))
620	croak (NULL);
621	else
622	croak ("FATAL: CCTXT coroutine returned!");
623	}
624	else
625	{
626	UNOP myop;
627
628	PL_op = (OP *)&myop;
629
630	Zero(&myop, 1, UNOP);
631	myop.op_next = Nullop;
632	myop.op_flags = OPf_WANT_VOID;
633
634	PUSHMARK(SP);
635	XPUSHs (sub_init);
636	/*
637	* the next line is slightly wrong, as PL_op->op_next
638	* is actually being executed so we skip the first op.
639	* that doesn't matter, though, since it is only
640	* pp_nextstate and we never return...
641	* ah yes, and I don't care anyways ;)
642	*/
643	PUTBACK;
644	PL_op = pp_entersub();
645	SPAGAIN;
646
647	ENTER; /* necessary e.g. for dounwind */
648	}
649	}	599	}
650		600
651	static void	601	static void
652	continue_coro (void *arg)	602	coro_run (void *arg)
653	{	603	{
		604	/* coro_run is the alternative tail of transfer(), so unlock here. */
		605	UNLOCK;
		606
654	/*	607	/*
655	* this is a _very_ stripped down perl interpreter ;)	608	* this is a _very_ stripped down perl interpreter ;)
656	*/	609	*/
657	Coro__State ctx = (Coro__State)arg;
658	JMPENV coro_start_env;
659
660	/* same as JMPENV_BOOTSTRAP */
661	Zero(&coro_start_env, 1, JMPENV);
662	coro_start_env.je_ret = -1;
663	coro_start_env.je_mustcatch = TRUE;
664	PL_top_env = &coro_start_env;	610	PL_top_env = &PL_start_env;
665		611
666	ctx->cursp = 0;	612	/* inject call to cctx_init */
667	PL_op = PL_op->op_next;	613	prepare_cctx ((coro_cctx *)arg);
668	CALLRUNOPS(aTHX);
669		614
		615	/* somebody will hit me for both perl_run and PL_restartop */
		616	PL_restartop = PL_op;
		617	perl_run (PL_curinterp);
		618
		619	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
670	abort ();	620	abort ();
671	}	621	}
672		622
673	STATIC void	623	static coro_cctx *
		624	cctx_new ()
		625	{
		626	coro_cctx *cctx;
		627
		628	++cctx_count;
		629
		630	Newz (0, cctx, 1, coro_cctx);
		631
		632	#if HAVE_MMAP
		633
		634	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		635	/* mmap supposedly does allocate-on-write for us */
		636	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		637
		638	if (cctx->sptr != (void *)-1)
		639	{
		640	# if STACKGUARD
		641	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		642	# endif
		643	REGISTER_STACK (
		644	cctx,
		645	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		646	cctx->ssize + (char *)cctx->sptr
		647	);
		648
		649	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		650	}
		651	else
		652	#endif
		653	{
		654	cctx->ssize = -STACKSIZE * (long)sizeof (long);
		655	New (0, cctx->sptr, STACKSIZE, long);
		656
		657	if (!cctx->sptr)
		658	{
		659	perror ("FATAL: unable to allocate stack for coroutine");
		660	_exit (EXIT_FAILURE);
		661	}
		662
		663	REGISTER_STACK (
		664	cctx,
		665	(char *)cctx->sptr,
		666	(char *)cctx->sptr - cctx->ssize
		667	);
		668
		669	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, -cctx->ssize);
		670	}
		671
		672	return cctx;
		673	}
		674
		675	static void
		676	cctx_destroy (coro_cctx *cctx)
		677	{
		678	if (!cctx)
		679	return;
		680
		681	--cctx_count;
		682
		683	#if USE_VALGRIND
		684	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		685	#endif
		686
		687	#if HAVE_MMAP
		688	if (cctx->ssize > 0)
		689	munmap (cctx->sptr, cctx->ssize);
		690	else
		691	#endif
		692	Safefree (cctx->sptr);
		693
		694	Safefree (cctx);
		695	}
		696
		697	static coro_cctx *
		698	cctx_get ()
		699	{
		700	coro_cctx *cctx;
		701
		702	if (cctx_first)
		703	{
		704	cctx = cctx_first;
		705	cctx_first = cctx->next;
		706	--cctx_idle;
		707	}
		708	else
		709	{
		710	cctx = cctx_new ();
		711	PL_op = PL_op->op_next;
		712	}
		713
		714	return cctx;
		715	}
		716
		717	static void
		718	cctx_put (coro_cctx *cctx)
		719	{
		720	/* free another cctx if overlimit */
		721	if (cctx_idle >= MAX_IDLE_CCTX)
		722	{
		723	coro_cctx *first = cctx_first;
		724	cctx_first = first->next;
		725	--cctx_idle;
		726
		727	assert (!first->inuse);
		728	cctx_destroy (first);
		729	}
		730
		731	++cctx_idle;
		732	cctx->next = cctx_first;
		733	cctx_first = cctx;
		734	}
		735
		736	/** coroutine switching *****************************************************/
		737
		738	/* never call directly, always through the coro_state_transfer global variable */
		739	static void NOINLINE
674	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	740	transfer (struct coro *prev, struct coro *next)
675	{	741	{
676	dSTACKLEVEL;	742	dSTACKLEVEL;
677	static struct coro *xnext;
678		743
		744	/* sometimes transfer is only called to set idle_sp */
		745	if (!next)
		746	{
		747	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		748	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		749	}
679	if (prev != next)	750	else if (prev != next)
680	{	751	{
681	xnext = next;	752	coro_cctx *prev__cctx;
682		753
683	if (next->mainstack)	754	if (prev->flags & CF_NEW)
684	{	755	{
685	SAVE (prev, flags);	756	/* create a new empty context */
686	LOAD (next);	757	Newz (0, prev->cctx, 1, coro_cctx);
687		758	prev->cctx->inuse = 1;
688	/* mark this state as in-use */	759	prev->flags &= ~CF_NEW;
689	next->mainstack = 0;	760	prev->flags |= CF_RUNNING;
690	next->tmps_ix = -2;
691
692	/* stacklevel changed? if yes, grab the stack for us! */
693	if (flags & TRANSFER_SAVE_CCTXT)
694	{
695	if (!prev->stack)
696	allocate_stack (prev, 0);
697	else if (prev->cursp != stacklevel
698	&& prev->stack->usecnt > 1)
699	{
700	prev->gencnt = ++prev->stack->gencnt;
701	prev->stack->usecnt = 1;
702	}
703
704	/* has our stack been invalidated? */
705	if (next->stack && next->stack->gencnt != next->gencnt)
706	{
707	deallocate_stack (next);
708	allocate_stack (next, 1);
709	coro_create (&(next->stack->cctx),
710	continue_coro, (void *)next,
711	next->stack->sptr, labs (next->stack->ssize));
712	}
713
714	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715	/* don't add any code here */
716	}
717
718	}	761	}
719	else if (next->tmps_ix == -2)	762
720	croak ("tried to transfer to running coroutine");	763	/*TODO: must not croak here */
		764	if (!prev->flags & CF_RUNNING)
		765	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		766
		767	if (next->flags & CF_RUNNING)
		768	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		769
		770	if (next->flags & CF_DESTROYED)
		771	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		772
		773	prev->flags &= ~CF_RUNNING;
		774	next->flags |= CF_RUNNING;
		775
		776	LOCK;
		777
		778	if (next->flags & CF_NEW)
		779	{
		780	/* need to start coroutine */
		781	next->flags &= ~CF_NEW;
		782	/* first get rid of the old state */
		783	save_perl (prev);
		784	/* setup coroutine call */
		785	setup_coro (next);
		786	/* need a new stack */
		787	assert (!next->cctx);
		788	}
721	else	789	else
722	{	790	{
723	SAVE (prev, -1); /* first get rid of the old state */	791	/* coroutine already started */
724		792	save_perl (prev);
725	if (flags & TRANSFER_SAVE_CCTXT)	793	load_perl (next);
726	{
727	if (!prev->stack)
728	allocate_stack (prev, 0);
729
730	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
731	{
732	setup_coro (next);
733
734	prev->stack->refcnt++;
735	prev->stack->usecnt++;
736	next->stack = prev->stack;
737	next->gencnt = prev->gencnt;
738	}
739	else
740	{
741	allocate_stack (next, 1);
742	coro_create (&(next->stack->cctx),
743	setup_coro, (void *)next,
744	next->stack->sptr, labs (next->stack->ssize));
745	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
746	/* don't add any code here */
747	}
748	}
749	else
750	setup_coro (next);
751	}	794	}
752		795
753	/*	796	prev__cctx = prev->cctx;
754	* xnext is now either prev or next, depending on wether	797
755	* we switched the c stack or not. that's why i use a global	798	/* possibly "free" the cctx */
756	* variable, that should become thread-specific at one point.	799	if (prev__cctx->idle_sp == STACKLEVEL)
757	*/	800	{
758	xnext->cursp = stacklevel;	801	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
759	}	802	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
760		803
761	if (coro_mortal)	804	prev->cctx = 0;
		805
		806	cctx_put (prev__cctx);
		807	prev__cctx->inuse = 0;
		808	}
		809
		810	if (!next->cctx)
		811	{
		812	next->cctx = cctx_get ();
		813	assert (!next->cctx->inuse);
		814	next->cctx->inuse = 1;
		815	}
		816
		817	if (prev__cctx != next->cctx)
		818	{
		819	prev__cctx->top_env = PL_top_env;
		820	PL_top_env = next->cctx->top_env;
		821	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		822	}
		823
		824	free_coro_mortal ();
		825	UNLOCK;
762	{	826	}
763	SvREFCNT_dec (coro_mortal);	827	}
764	coro_mortal = 0;	828
		829	struct transfer_args
		830	{
		831	struct coro *prev, *next;
		832	};
		833
		834	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
		835
		836	/** high level stuff ********************************************************/
		837
		838	static int
		839	coro_state_destroy (struct coro *coro)
		840	{
		841	if (coro->flags & CF_DESTROYED)
		842	return 0;
		843
		844	coro->flags |= CF_DESTROYED;
		845
		846	if (coro->flags & CF_READY)
765	}	847	{
766	}	848	/* reduce nready, as destroying a ready coro effectively unreadies it */
		849	/* alternative: look through all ready queues and remove the coro */
		850	LOCK;
		851	--coro_nready;
		852	UNLOCK;
		853	}
		854	else
		855	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
767		856
768	#define SV_CORO(sv,func) \	857	if (coro->mainstack && coro->mainstack != main_mainstack)
769	do { \	858	{
770	if (SvROK (sv)) \	859	struct coro temp;
771	sv = SvRV (sv); \
772	\
773	if (SvTYPE(sv) == SVt_PVHV) \
774	{ \
775	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
776	\
777	if (!he) \
778	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
779	\
780	(sv) = SvRV (HeVAL(he)); \
781	} \
782	\
783	/* must also be changed inside Coro::Cont::yield */ \
784	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
785	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
786	\
787	} while(0)
788		860
789	#define SvSTATE(sv) (struct coro *)SvIV (sv)	861	assert (!(coro->flags & CF_RUNNING));
790		862
		863	Zero (&temp, 1, struct coro);
		864	temp.save = CORO_SAVE_ALL;
		865
		866	if (coro->flags & CF_RUNNING)
		867	croak ("FATAL: tried to destroy currently running coroutine");
		868
		869	save_perl (&temp);
		870	load_perl (coro);
		871
		872	coro_destroy_stacks ();
		873
		874	load_perl (&temp); /* this will get rid of defsv etc.. */
		875
		876	coro->mainstack = 0;
		877	}
		878
		879	cctx_destroy (coro->cctx);
		880	SvREFCNT_dec (coro->args);
		881
		882	return 1;
		883	}
		884
791	static void	885	static int
		886	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		887	{
		888	struct coro *coro = (struct coro *)mg->mg_ptr;
		889	mg->mg_ptr = 0;
		890
		891	if (--coro->refcnt < 0)
		892	{
		893	coro_state_destroy (coro);
		894	Safefree (coro);
		895	}
		896
		897	return 0;
		898	}
		899
		900	static int
		901	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		902	{
		903	struct coro *coro = (struct coro *)mg->mg_ptr;
		904
		905	++coro->refcnt;
		906
		907	return 0;
		908	}
		909
		910	static MGVTBL coro_state_vtbl = {
		911	0, 0, 0, 0,
		912	coro_state_free,
		913	0,
		914	#ifdef MGf_DUP
		915	coro_state_dup,
		916	#else
		917	# define MGf_DUP 0
		918	#endif
		919	};
		920
		921	static struct coro *
		922	SvSTATE (SV *coro)
		923	{
		924	HV *stash;
		925	MAGIC *mg;
		926
		927	if (SvROK (coro))
		928	coro = SvRV (coro);
		929
		930	stash = SvSTASH (coro);
		931	if (stash != coro_stash && stash != coro_state_stash)
		932	{
		933	/* very slow, but rare, check */
		934	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		935	croak ("Coro::State object required");
		936	}
		937
		938	mg = SvMAGIC (coro);
		939	assert (mg->mg_type == PERL_MAGIC_ext);
		940	return (struct coro *)mg->mg_ptr;
		941	}
		942
		943	static void
		944	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		945	{
		946	ta->prev = SvSTATE (prev_sv);
		947	ta->next = SvSTATE (next_sv);
		948	}
		949
		950	static void
792	api_transfer(pTHX_ SV *prev, SV *next, int flags)	951	api_transfer (SV *prev_sv, SV *next_sv)
793	{	952	{
794	SV_CORO (prev, "Coro::transfer");	953	struct transfer_args ta;
795	SV_CORO (next, "Coro::transfer");
796		954
797	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	955	prepare_transfer (&ta, prev_sv, next_sv);
		956	TRANSFER (ta);
		957	}
		958
		959	static int
		960	api_save (SV *coro_sv, int new_save)
		961	{
		962	struct coro *coro = SvSTATE (coro_sv);
		963	int old_save = coro->save;
		964
		965	if (new_save >= 0)
		966	coro->save = new_save;
		967
		968	return old_save;
798	}	969	}
799		970
800	/** Coro ********************************************************************/	971	/** Coro ********************************************************************/
801		972
802	#define PRIO_MAX 3
803	#define PRIO_HIGH 1
804	#define PRIO_NORMAL 0
805	#define PRIO_LOW -1
806	#define PRIO_IDLE -3
807	#define PRIO_MIN -4
808
809	/* for Coro.pm */
810	static GV *coro_current, *coro_idle;
811	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
812	static int coro_nready;
813
814	static void	973	static void
815	coro_enq (SV *sv)	974	coro_enq (SV *coro_sv)
816	{	975	{
817	if (SvTYPE (sv) == SVt_PVHV)
818	{
819	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
820	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
821
822	prio = prio > PRIO_MAX ? PRIO_MAX
823	: prio < PRIO_MIN ? PRIO_MIN
824	: prio;
825
826	av_push (coro_ready [prio - PRIO_MIN], sv);	976	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
827	coro_nready++;
828
829	return;
830	}
831
832	croak ("Coro::ready tried to enqueue something that is not a coroutine");
833	}	977	}
834		978
835	static SV *	979	static SV *
836	coro_deq (int min_prio)	980	coro_deq (int min_prio)
837	{	981	{
…		…
840	min_prio -= PRIO_MIN;	984	min_prio -= PRIO_MIN;
841	if (min_prio < 0)	985	if (min_prio < 0)
842	min_prio = 0;	986	min_prio = 0;
843		987
844	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	988	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
845	if (av_len (coro_ready[prio]) >= 0)	989	if (AvFILLp (coro_ready [prio]) >= 0)
846	{
847	coro_nready--;
848	return av_shift (coro_ready[prio]);	990	return av_shift (coro_ready [prio]);
849	}
850		991
851	return 0;	992	return 0;
852	}	993	}
853		994
854	static void	995	static int
855	api_ready (SV *coro)	996	api_ready (SV *coro_sv)
856	{	997	{
		998	struct coro *coro;
		999
857	if (SvROK (coro))	1000	if (SvROK (coro_sv))
858	coro = SvRV (coro);	1001	coro_sv = SvRV (coro_sv);
859		1002
		1003	coro = SvSTATE (coro_sv);
		1004
		1005	if (coro->flags & CF_READY)
		1006	return 0;
		1007
		1008	coro->flags |= CF_READY;
		1009
		1010	LOCK;
860	coro_enq (SvREFCNT_inc (coro));	1011	coro_enq (SvREFCNT_inc (coro_sv));
		1012	++coro_nready;
		1013	UNLOCK;
		1014
		1015	return 1;
		1016	}
		1017
		1018	static int
		1019	api_is_ready (SV *coro_sv)
		1020	{
		1021	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1022	}
		1023
		1024	static void
		1025	prepare_schedule (struct transfer_args *ta)
		1026	{
		1027	SV *prev_sv, *next_sv;
		1028
		1029	for (;;)
		1030	{
		1031	LOCK;
		1032	next_sv = coro_deq (PRIO_MIN);
		1033
		1034	/* nothing to schedule: call the idle handler */
		1035	if (!next_sv)
		1036	{
		1037	dSP;
		1038	UNLOCK;
		1039
		1040	ENTER;
		1041	SAVETMPS;
		1042
		1043	PUSHMARK (SP);
		1044	PUTBACK;
		1045	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1046
		1047	FREETMPS;
		1048	LEAVE;
		1049	continue;
		1050	}
		1051
		1052	ta->next = SvSTATE (next_sv);
		1053
		1054	/* cannot transfer to destroyed coros, skip and look for next */
		1055	if (ta->next->flags & CF_DESTROYED)
		1056	{
		1057	UNLOCK;
		1058	SvREFCNT_dec (next_sv);
		1059	/* coro_nready is already taken care of by destroy */
		1060	continue;
		1061	}
		1062
		1063	--coro_nready;
		1064	UNLOCK;
		1065	break;
		1066	}
		1067
		1068	/* free this only after the transfer */
		1069	prev_sv = SvRV (coro_current);
		1070	SvRV_set (coro_current, next_sv);
		1071	ta->prev = SvSTATE (prev_sv);
		1072
		1073	assert (ta->next->flags & CF_READY);
		1074	ta->next->flags &= ~CF_READY;
		1075
		1076	LOCK;
		1077	free_coro_mortal ();
		1078	coro_mortal = prev_sv;
		1079	UNLOCK;
		1080	}
		1081
		1082	static void
		1083	prepare_cede (struct transfer_args *ta)
		1084	{
		1085	api_ready (coro_current);
		1086	prepare_schedule (ta);
		1087	}
		1088
		1089	static int
		1090	prepare_cede_notself (struct transfer_args *ta)
		1091	{
		1092	if (coro_nready)
		1093	{
		1094	SV *prev = SvRV (coro_current);
		1095	prepare_schedule (ta);
		1096	api_ready (prev);
		1097	return 1;
		1098	}
		1099	else
		1100	return 0;
861	}	1101	}
862		1102
863	static void	1103	static void
864	api_schedule (void)	1104	api_schedule (void)
865	{	1105	{
866	SV *prev, *next;	1106	struct transfer_args ta;
867		1107
868	prev = SvRV (GvSV (coro_current));	1108	prepare_schedule (&ta);
869	next = coro_deq (PRIO_MIN);	1109	TRANSFER (ta);
870
871	if (!next)
872	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
873
874	/* free this only after the transfer */
875	coro_mortal = prev;
876	SV_CORO (prev, "Coro::schedule");
877
878	SvRV (GvSV (coro_current)) = next;
879
880	SV_CORO (next, "Coro::schedule");
881
882	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
883	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
884	}	1110	}
885		1111
886	static void	1112	static int
887	api_cede (void)	1113	api_cede (void)
888	{	1114	{
889	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1115	struct transfer_args ta;
890		1116
891	api_schedule ();	1117	prepare_cede (&ta);
		1118
		1119	if (ta.prev != ta.next)
		1120	{
		1121	TRANSFER (ta);
		1122	return 1;
		1123	}
		1124	else
		1125	return 0;
		1126	}
		1127
		1128	static int
		1129	api_cede_notself (void)
		1130	{
		1131	struct transfer_args ta;
		1132
		1133	if (prepare_cede_notself (&ta))
		1134	{
		1135	TRANSFER (ta);
		1136	return 1;
		1137	}
		1138	else
		1139	return 0;
892	}	1140	}
893		1141
894	MODULE = Coro::State PACKAGE = Coro::State	1142	MODULE = Coro::State PACKAGE = Coro::State
895		1143
896	PROTOTYPES: ENABLE	1144	PROTOTYPES: DISABLE
897		1145
898	BOOT:	1146	BOOT:
899	{ /* {} necessary for stoopid perl-5.6.x */	1147	{
900	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1148	#ifdef USE_ITHREADS
901	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1149	MUTEX_INIT (&coro_mutex);
		1150	#endif
		1151	BOOT_PAGESIZE;
		1152
902	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1153	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
903		1154
904	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1155	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
905	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1156	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
906	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1157	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
907	newCONSTSUB (coro_state_stash, "SAVE_CURPM", newSViv (TRANSFER_SAVE_CURPM));	1158	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
908	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1159	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
909
910	if (!padlist_cache)
911	padlist_cache = newHV ();
912		1160
913	main_mainstack = PL_mainstack;	1161	main_mainstack = PL_mainstack;
914		1162
915	coroapi.ver = CORO_API_VERSION;	1163	coroapi.ver = CORO_API_VERSION;
916	coroapi.transfer = api_transfer;	1164	coroapi.transfer = api_transfer;
917	}
918		1165
919	Coro::State	1166	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
920	_newprocess(args)	1167	}
921	SV * args	1168
922	PROTOTYPE: $	1169	SV *
		1170	new (char *klass, ...)
923	CODE:	1171	CODE:
924	Coro__State coro;	1172	{
		1173	struct coro *coro;
		1174	HV *hv;
		1175	int i;
925		1176
926	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
927	croak ("Coro::State::_newprocess expects an arrayref");
928
929	New (0, coro, 1, struct coro);	1177	Newz (0, coro, 1, struct coro);
		1178	coro->args = newAV ();
		1179	coro->save = CORO_SAVE_ALL;
		1180	coro->flags = CF_NEW;
930		1181
931	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1182	hv = newHV ();
932	coro->mainstack = 0; /* actual work is done inside transfer */	1183	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
933	coro->stack = 0;	1184	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
934		1185
935	RETVAL = coro;	1186	for (i = 1; i < items; i++)
		1187	av_push (coro->args, newSVsv (ST (i)));
		1188	}
936	OUTPUT:	1189	OUTPUT:
937	RETVAL	1190	RETVAL
938		1191
		1192	int
		1193	save (SV *coro, int new_save = -1)
		1194	CODE:
		1195	RETVAL = api_save (coro, new_save);
		1196	OUTPUT:
		1197	RETVAL
		1198
939	void	1199	void
940	transfer(prev, next, flags)	1200	_set_stacklevel (...)
941	SV *prev	1201	ALIAS:
942	SV *next	1202	Coro::State::transfer = 1
943	int flags	1203	Coro::schedule = 2
944	PROTOTYPE: @	1204	Coro::cede = 3
		1205	Coro::cede_notself = 4
945	CODE:	1206	CODE:
946	PUTBACK;	1207	{
947	SV_CORO (next, "Coro::transfer");	1208	struct transfer_args ta;
948	SV_CORO (prev, "Coro::transfer");	1209
949	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1210	switch (ix)
950	SPAGAIN;	1211	{
		1212	case 0:
		1213	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1214	ta.next = 0;
		1215	break;
		1216
		1217	case 1:
		1218	if (items != 2)
		1219	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1220
		1221	prepare_transfer (&ta, ST (0), ST (1));
		1222	break;
		1223
		1224	case 2:
		1225	prepare_schedule (&ta);
		1226	break;
		1227
		1228	case 3:
		1229	prepare_cede (&ta);
		1230	break;
		1231
		1232	case 4:
		1233	if (!prepare_cede_notself (&ta))
		1234	XSRETURN_EMPTY;
		1235
		1236	break;
		1237	}
		1238
		1239	BARRIER;
		1240	TRANSFER (ta);
		1241
		1242	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1243	XSRETURN_YES;
		1244	}
		1245
		1246	bool
		1247	_destroy (SV *coro_sv)
		1248	CODE:
		1249	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
		1250	OUTPUT:
		1251	RETVAL
951		1252
952	void	1253	void
953	DESTROY(coro)
954	Coro::State coro
955	CODE:
956
957	if (coro->mainstack && coro->mainstack != main_mainstack)
958	{
959	struct coro temp;
960
961	PUTBACK;
962	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
963	LOAD(aTHX_ coro);
964	SPAGAIN;
965
966	destroy_stacks (aTHX);
967
968	LOAD((&temp)); /* this will get rid of defsv etc.. */
969	SPAGAIN;
970
971	coro->mainstack = 0;
972	}
973
974	deallocate_stack (coro);
975
976	Safefree (coro);
977
978	void
979	flush()
980	CODE:
981	#ifdef MAY_FLUSH
982	flush_padlist_cache ();
983	#endif
984
985	void
986	_exit(code)	1254	_exit (code)
987	int code	1255	int code
988	PROTOTYPE: $	1256	PROTOTYPE: $
989	CODE:	1257	CODE:
990	#if defined(__GLIBC__) || _POSIX_C_SOURCE
991	_exit (code);	1258	_exit (code);
992	#else
993	signal (SIGTERM, SIG_DFL);
994	raise (SIGTERM);
995	exit (code);
996	#endif
997		1259
998	MODULE = Coro::State PACKAGE = Coro::Cont	1260	int
		1261	cctx_count ()
		1262	CODE:
		1263	RETVAL = cctx_count;
		1264	OUTPUT:
		1265	RETVAL
999		1266
1000	# this is slightly dirty (should expose a c-level api)	1267	int
1001		1268	cctx_idle ()
1002	void	1269	CODE:
1003	yield(...)	1270	RETVAL = cctx_idle;
1004	PROTOTYPE: @	1271	OUTPUT:
1005	CODE:	1272	RETVAL
1006	static SV *returnstk;
1007	SV *sv;
1008	AV *defav = GvAV (PL_defgv);
1009	struct coro *prev, *next;
1010
1011	if (!returnstk)
1012	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1013
1014	/* set up @_ -- ugly */
1015	av_clear (defav);
1016	av_fill (defav, items - 1);
1017	while (items--)
1018	av_store (defav, items, SvREFCNT_inc (ST(items)));
1019
1020	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1021	sv = av_pop ((AV *)SvRV (returnstk));
1022	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1023	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1024	SvREFCNT_dec (sv);
1025
1026	transfer(aTHX_ prev, next, 0);
1027		1273
1028	MODULE = Coro::State PACKAGE = Coro	1274	MODULE = Coro::State PACKAGE = Coro
1029		1275
1030	# this is slightly dirty (should expose a c-level api)
1031
1032	BOOT:	1276	BOOT:
1033	{	1277	{
1034	int i;	1278	int i;
		1279
1035	HV *stash = gv_stashpv ("Coro", TRUE);	1280	coro_stash = gv_stashpv ("Coro", TRUE);
1036		1281
1037	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1282	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1038	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1283	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1039	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1284	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1040	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1285	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1041	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1286	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1042	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1287	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1043		1288
1044	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1289	coro_current = get_sv ("Coro::current", FALSE);
1045	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1290	SvREADONLY_on (coro_current);
1046		1291
1047	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1292	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1048	coro_ready[i] = newAV ();	1293	coro_ready[i] = newAV ();
1049		1294
1050	{	1295	{
1051	SV *sv = perl_get_sv("Coro::API", 1);	1296	SV *sv = perl_get_sv("Coro::API", 1);
1052		1297
1053	coroapi.schedule = api_schedule;	1298	coroapi.schedule = api_schedule;
		1299	coroapi.save = api_save;
1054	coroapi.cede = api_cede;	1300	coroapi.cede = api_cede;
		1301	coroapi.cede_notself = api_cede_notself;
1055	coroapi.ready = api_ready;	1302	coroapi.ready = api_ready;
		1303	coroapi.is_ready = api_is_ready;
1056	coroapi.nready = &coro_nready;	1304	coroapi.nready = &coro_nready;
1057	coroapi.current = coro_current;	1305	coroapi.current = coro_current;
1058		1306
1059	GCoroAPI = &coroapi;	1307	GCoroAPI = &coroapi;
1060	sv_setiv(sv, (IV)&coroapi);	1308	sv_setiv (sv, (IV)&coroapi);
1061	SvREADONLY_on(sv);	1309	SvREADONLY_on (sv);
1062	}	1310	}
1063	}	1311	}
1064		1312
1065	void	1313	void
1066	ready(self)	1314	_set_current (SV *current)
1067	SV * self
1068	PROTOTYPE: $	1315	PROTOTYPE: $
1069	CODE:	1316	CODE:
1070	api_ready (self);	1317	SvREFCNT_dec (SvRV (coro_current));
		1318	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1071		1319
1072	int	1320	int
		1321	prio (Coro::State coro, int newprio = 0)
		1322	ALIAS:
		1323	nice = 1
		1324	CODE:
		1325	{
		1326	RETVAL = coro->prio;
		1327
		1328	if (items > 1)
		1329	{
		1330	if (ix)
		1331	newprio = coro->prio - newprio;
		1332
		1333	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1334	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1335
		1336	coro->prio = newprio;
		1337	}
		1338	}
		1339	OUTPUT:
		1340	RETVAL
		1341
		1342	SV *
		1343	ready (SV *self)
		1344	PROTOTYPE: $
		1345	CODE:
		1346	RETVAL = boolSV (api_ready (self));
		1347	OUTPUT:
		1348	RETVAL
		1349
		1350	SV *
		1351	is_ready (SV *self)
		1352	PROTOTYPE: $
		1353	CODE:
		1354	RETVAL = boolSV (api_is_ready (self));
		1355	OUTPUT:
		1356	RETVAL
		1357
		1358	int
1073	nready(...)	1359	nready (...)
1074	PROTOTYPE:	1360	PROTOTYPE:
1075	CODE:	1361	CODE:
1076	RETVAL = coro_nready;	1362	RETVAL = coro_nready;
1077	OUTPUT:	1363	OUTPUT:
1078	RETVAL	1364	RETVAL
1079		1365
		1366	MODULE = Coro::State PACKAGE = Coro::AIO
		1367
		1368	SV *
		1369	_get_state ()
		1370	CODE:
		1371	{
		1372	struct io_state *data;
		1373
		1374	RETVAL = newSV (sizeof (struct io_state));
		1375	data = (struct io_state *)SvPVX (RETVAL);
		1376	SvCUR_set (RETVAL, sizeof (struct io_state));
		1377	SvPOK_only (RETVAL);
		1378
		1379	data->errorno = errno;
		1380	data->laststype = PL_laststype;
		1381	data->laststatval = PL_laststatval;
		1382	data->statcache = PL_statcache;
		1383	}
		1384	OUTPUT:
		1385	RETVAL
		1386
1080	void	1387	void
1081	schedule(...)	1388	_set_state (char *data_)
1082	PROTOTYPE:	1389	PROTOTYPE: $
1083	CODE:	1390	CODE:
1084	api_schedule ();	1391	{
		1392	struct io_state *data = (void *)data_;
1085		1393
1086	void	1394	errno = data->errorno;
1087	cede(...)	1395	PL_laststype = data->laststype;
1088	PROTOTYPE:	1396	PL_laststatval = data->laststatval;
1089	CODE:	1397	PL_statcache = data->statcache;
1090	api_cede ();	1398	}
1091		1399

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