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Comparing Coro/Coro/State.xs (file contents):
Revision 1.61 by root, Tue Aug 10 01:56:30 2004 UTC vs.
Revision 1.132 by root, Fri Dec 29 13:03:05 2006 UTC

1	#define PERL_NO_GET_CONTEXT	1	#include "libcoro/coro.c"
2		2
3	#include "EXTERN.h"	3	#include "EXTERN.h"
4	#include "perl.h"	4	#include "perl.h"
5	#include "XSUB.h"	5	#include "XSUB.h"
6		6
7	#include "patchlevel.h"	7	#include "patchlevel.h"
8		8
9	#if PATCHLEVEL < 6	9	#include <stdio.h>
		10	#include <errno.h>
		11	#include <assert.h>
		12
		13	#ifdef HAVE_MMAP
		14	# include <unistd.h>
		15	# include <sys/mman.h>
		16	# ifndef MAP_ANONYMOUS
		17	# ifdef MAP_ANON
		18	# define MAP_ANONYMOUS MAP_ANON
		19	# else
		20	# undef HAVE_MMAP
		21	# 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
		30	# endif
		31	#else
		32	# define PAGESIZE 0
		33	# define BOOT_PAGESIZE (void)0
		34	#endif
		35
		36	#if USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	#endif
		39
		40	/* the maximum number of idle cctx that will be pooled */
		41	#define MAX_IDLE_CCTX 8
		42
		43	#define PERL_VERSION_ATLEAST(a,b,c) \
		44	(PERL_REVISION > (a) \
		45	|| (PERL_REVISION == (a) \
		46	&& (PERL_VERSION > (b) \
		47	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		48
		49	#if !PERL_VERSION_ATLEAST (5,6,0)
10	# ifndef PL_ppaddr	50	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	51	# define PL_ppaddr ppaddr
12	# endif	52	# endif
13	# ifndef call_sv	53	# ifndef call_sv
14	# define call_sv perl_call_sv	54	# define call_sv perl_call_sv
…		…
25	# ifndef IS_PADCONST	65	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	66	# define IS_PADCONST(v) 0
27	# endif	67	# endif
28	#endif	68	#endif
29		69
30	#include "libcoro/coro.c"	70	/* 5.8.7 */
31		71	#ifndef SvRV_set
32	#include <signal.h>	72	# define SvRV_set(s,v) SvRV(s) = (v)
33
34	#ifdef HAVE_MMAP
35	# include <unistd.h>
36	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS
38	# ifdef MAP_ANON
39	# define MAP_ANONYMOUS MAP_ANON
40	# else
41	# undef HAVE_MMAP
42	# endif
43	# endif	73	#endif
44	#endif
45		74
46	#define SUB_INIT "Coro::State::initialize"	75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	#define UCORO_STATE "_coro_state"	76	# undef STACKGUARD
		77	#endif
		78
		79	#ifndef STACKGUARD
		80	# define STACKGUARD 0
		81	#endif
		82
		83	/* prefer perl internal functions over our own? */
		84	#ifndef PREFER_PERL_FUNCTIONS
		85	# define PREFER_PERL_FUNCTIONS 0
		86	#endif
48		87
49	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* The next macro should declare a variable stacklevel that contains and approximation
50	* to the current C stack pointer. Its property is that it changes with each call	89	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	90	* and should be unique. */
		91	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	92	#define STACKLEVEL ((void *)&stacklevel)
53		93
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		95
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	96	#if __GNUC__ >= 3
		97	# define attribute(x) __attribute__(x)
		98	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		99	#else
		100	# define attribute(x)
		101	# define BARRIER
		102	#endif
		103
		104	#define NOINLINE attribute ((noinline))
57		105
58	#include "CoroAPI.h"	106	#include "CoroAPI.h"
59		107
60	#ifdef USE_ITHREADS	108	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	109	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	110	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	111	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	112	#else
65	# define LOCK 0	113	# define LOCK (void)0
66	# define UNLOCK 0	114	# define UNLOCK (void)0
67	#endif	115	#endif
		116
		117	struct io_state
		118	{
		119	int errorno;
		120	I32 laststype;
		121	int laststatval;
		122	Stat_t statcache;
		123	};
68		124
69	static struct CoroAPI coroapi;	125	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	126	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	127	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV *coro_mortal; /* will be freed after next transfer */	128	static SV *coro_mortal; /* will be freed after next transfer */
75		129
76	/* this is actually not only the c stack but also c registers etc... */	130	static struct coro_cctx *cctx_first;
		131	static int cctx_count, cctx_idle;
		132
		133	/* this is a structure representing a c-level coroutine */
77	typedef struct {	134	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	135	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		136
82	coro_context cctx;	137	/* the stack */
83
84	void *sptr;	138	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	139	long ssize; /* positive == mmap, otherwise malloc */
86	} coro_stack;
87		140
		141	/* cpu state */
		142	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		143	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		144	JMPENV *top_env;
		145	coro_context cctx;
		146
		147	int inuse;
		148
		149	#if USE_VALGRIND
		150	int valgrind_id;
		151	#endif
		152	} coro_cctx;
		153
		154	enum {
		155	CF_RUNNING = 0x0001, /* coroutine is running */
		156	CF_READY = 0x0002, /* coroutine is ready */
		157	CF_NEW = 0x0004, /* ahs never been switched to */
		158	};
		159
		160	/* this is a structure representing a perl-level coroutine */
88	struct coro {	161	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	162	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	163	coro_cctx *cctx;
91
92	/* the optional C context */
93	coro_stack *stack;
94	void *cursp;
95	int gencnt;
96
97	/* optionally saved, might be zero */
98	AV *defav;
99	SV *defsv;
100	SV *errsv;
101
102	/* saved global state not related to stacks */
103	U8 dowarn;
104	I32 in_eval;
105
106	/* the stacks and related info (callchain etc..) */
107	PERL_SI *curstackinfo;
108	AV *curstack;
109	AV *mainstack;
110	SV **stack_sp;
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	SV **stack_base;
115	SV **stack_max;
116	SV **tmps_stack;
117	I32 tmps_floor;
118	I32 tmps_ix;
119	I32 tmps_max;
120	I32 *markstack;
121	I32 *markstack_ptr;
122	I32 *markstack_max;
123	I32 *scopestack;
124	I32 scopestack_ix;
125	I32 scopestack_max;
126	ANY *savestack;
127	I32 savestack_ix;
128	I32 savestack_max;
129	OP **retstack;
130	I32 retstack_ix;
131	I32 retstack_max;
132	COP *curcop;
133	JMPENV *top_env;
134		164
135	/* data associated with this coroutine (initial args) */	165	/* data associated with this coroutine (initial args) */
136	AV *args;	166	AV *args;
		167	int refcnt;
		168	int save; /* CORO_SAVE flags */
		169	int flags; /* CF_ flags */
		170
		171	/* optionally saved, might be zero */
		172	AV *defav; /* @_ */
		173	SV *defsv; /* $_ */
		174	SV *errsv; /* $@ */
		175	SV *irssv; /* $/ */
		176	SV *irssv_sv; /* real $/ cache */
		177
		178	#define VAR(name,type) type name;
		179	# include "state.h"
		180	#undef VAR
		181
		182	/* coro process data */
		183	int prio;
137	};	184	};
138		185
139	typedef struct coro *Coro__State;	186	typedef struct coro *Coro__State;
140	typedef struct coro *Coro__State_or_hashref;	187	typedef struct coro *Coro__State_or_hashref;
141		188
142	/* mostly copied from op.c:cv_clone2 */	189	static AV *
143	STATIC AV *	190	coro_clone_padlist (CV *cv)
144	clone_padlist (pTHX_ AV *protopadlist)
145	{	191	{
146	AV *av;	192	AV *padlist = CvPADLIST (cv);
147	I32 ix;
148	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
149	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
150	SV **pname = AvARRAY (protopad_name);
151	SV **ppad = AvARRAY (protopad);
152	I32 fname = AvFILLp (protopad_name);
153	I32 fpad = AvFILLp (protopad);
154	AV *newpadlist, *newpad_name, *newpad;	193	AV *newpadlist, *newpad;
155	SV **npad;
156
157	newpad_name = newAV ();
158	for (ix = fname; ix >= 0; ix--)
159	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161	newpad = newAV ();
162	av_fill (newpad, AvFILLp (protopad));
163	npad = AvARRAY (newpad);
164		194
165	newpadlist = newAV ();	195	newpadlist = newAV ();
166	AvREAL_off (newpadlist);	196	AvREAL_off (newpadlist);
167	av_store (newpadlist, 0, (SV *) newpad_name);	197	#if PERL_VERSION_ATLEAST (5,9,0)
		198	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		199	#else
		200	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		201	#endif
		202	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		203	--AvFILLp (padlist);
		204
		205	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
168	av_store (newpadlist, 1, (SV *) newpad);	206	av_store (newpadlist, 1, (SV *)newpad);
169
170	av = newAV (); /* will be @_ */
171	av_extend (av, 0);
172	av_store (newpad, 0, (SV *) av);
173	AvFLAGS (av) = AVf_REIFY;
174
175	for (ix = fpad; ix > 0; ix--)
176	{
177	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
178
179	if (namesv && namesv != &PL_sv_undef)
180	{
181	char *name = SvPVX (namesv); /* XXX */
182
183	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
184	{ /* lexical from outside? */
185	npad[ix] = SvREFCNT_inc (ppad[ix]);
186	}
187	else
188	{ /* our own lexical */
189	SV *sv;
190	if (*name == '&')
191	sv = SvREFCNT_inc (ppad[ix]);
192	else if (*name == '@')
193	sv = (SV *) newAV ();
194	else if (*name == '%')
195	sv = (SV *) newHV ();
196	else
197	sv = NEWSV (0, 0);
198
199	#ifdef SvPADBUSY
200	if (!SvPADBUSY (sv))
201	#endif
202	SvPADMY_on (sv);
203
204	npad[ix] = sv;
205	}
206	}
207	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
208	{
209	npad[ix] = SvREFCNT_inc (ppad[ix]);
210	}
211	else
212	{
213	SV *sv = NEWSV (0, 0);
214	SvPADTMP_on (sv);
215	npad[ix] = sv;
216	}
217	}
218
219	#if 0 /* return -ENOTUNDERSTOOD */
220	/* Now that vars are all in place, clone nested closures. */
221
222	for (ix = fpad; ix > 0; ix--) {
223	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224	if (namesv
225	&& namesv != &PL_sv_undef
226	&& !(SvFLAGS(namesv) & SVf_FAKE)
227	&& *SvPVX(namesv) == '&'
228	&& CvCLONE(ppad[ix]))
229	{
230	CV *kid = cv_clone((CV*)ppad[ix]);
231	SvREFCNT_dec(ppad[ix]);
232	CvCLONE_on(kid);
233	SvPADMY_on(kid);
234	npad[ix] = (SV*)kid;
235	}
236	}
237	#endif
238		207
239	return newpadlist;	208	return newpadlist;
240	}	209	}
241		210
242	STATIC void	211	static void
243	free_padlist (pTHX_ AV *padlist)	212	free_padlist (AV *padlist)
244	{	213	{
245	/* may be during global destruction */	214	/* may be during global destruction */
246	if (SvREFCNT (padlist))	215	if (SvREFCNT (padlist))
247	{	216	{
248	I32 i = AvFILLp (padlist);	217	I32 i = AvFILLp (padlist);
…		…
261		230
262	SvREFCNT_dec ((SV*)padlist);	231	SvREFCNT_dec ((SV*)padlist);
263	}	232	}
264	}	233	}
265		234
266	STATIC int	235	static int
267	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	236	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268	{	237	{
269	AV *padlist;	238	AV *padlist;
270	AV *av = (AV *)mg->mg_obj;	239	AV *av = (AV *)mg->mg_obj;
271		240
272	/* casting is fun. */	241	/* casting is fun. */
273	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	242	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274	free_padlist (aTHX_ padlist);	243	free_padlist (padlist);
275		244
276	SvREFCNT_dec (av);	245	SvREFCNT_dec (av);
		246
		247	return 0;
277	}	248	}
278		249
279	#define PERL_MAGIC_coro PERL_MAGIC_ext	250	#define PERL_MAGIC_coro PERL_MAGIC_ext
280		251
281	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	252	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
282		253
		254	#define CORO_MAGIC(cv) \
		255	SvMAGIC (cv) \
		256	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		257	? SvMAGIC (cv) \
		258	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		259	: 0
		260
283	/* the next two functions merely cache the padlists */	261	/* the next two functions merely cache the padlists */
284	STATIC void	262	static void
285	get_padlist (pTHX_ CV *cv)	263	get_padlist (CV *cv)
286	{	264	{
287	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	265	MAGIC *mg = CORO_MAGIC (cv);
		266	AV *av;
288		267
289	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	268	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
290	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	269	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
291	else	270	else
		271	{
		272	#if PREFER_PERL_FUNCTIONS
		273	/* this is probably cleaner, but also slower? */
		274	CV *cp = Perl_cv_clone (cv);
		275	CvPADLIST (cv) = CvPADLIST (cp);
		276	CvPADLIST (cp) = 0;
		277	SvREFCNT_dec (cp);
		278	#else
292	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	279	CvPADLIST (cv) = coro_clone_padlist (cv);
		280	#endif
		281	}
293	}	282	}
294		283
295	STATIC void	284	static void
296	put_padlist (pTHX_ CV *cv)	285	put_padlist (CV *cv)
297	{	286	{
298	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	287	MAGIC *mg = CORO_MAGIC (cv);
		288	AV *av;
299		289
300	if (!mg)	290	if (!mg)
301	{	291	{
302	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	292	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
303	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	293	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
304	mg->mg_virtual = &vtbl_coro;	294	mg->mg_virtual = &vtbl_coro;
305	mg->mg_obj = (SV *)newAV ();	295	mg->mg_obj = (SV *)newAV ();
306	}	296	}
307		297
308	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	298	av = (AV *)mg->mg_obj;
		299
		300	if (AvFILLp (av) >= AvMAX (av))
		301	av_extend (av, AvMAX (av) + 1);
		302
		303	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
309	}	304	}
310		305
311	#define SB do {	306	#define SB do {
312	#define SE } while (0)	307	#define SE } while (0)
313		308
314	#define LOAD(state) load_state(aTHX_ (state));
315	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
316
317	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	309	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
318		310
319	static void	311	static void
320	load_state(pTHX_ Coro__State c)	312	load_perl (Coro__State c)
321	{	313	{
322	PL_dowarn = c->dowarn;	314	#define VAR(name,type) PL_ ## name = c->name;
323	PL_in_eval = c->in_eval;	315	# include "state.h"
324		316	#undef VAR
325	PL_curstackinfo = c->curstackinfo;
326	PL_curstack = c->curstack;
327	PL_mainstack = c->mainstack;
328	PL_stack_sp = c->stack_sp;
329	PL_op = c->op;
330	PL_curpad = c->curpad;
331	PL_comppad = c->comppad;
332	PL_stack_base = c->stack_base;
333	PL_stack_max = c->stack_max;
334	PL_tmps_stack = c->tmps_stack;
335	PL_tmps_floor = c->tmps_floor;
336	PL_tmps_ix = c->tmps_ix;
337	PL_tmps_max = c->tmps_max;
338	PL_markstack = c->markstack;
339	PL_markstack_ptr = c->markstack_ptr;
340	PL_markstack_max = c->markstack_max;
341	PL_scopestack = c->scopestack;
342	PL_scopestack_ix = c->scopestack_ix;
343	PL_scopestack_max = c->scopestack_max;
344	PL_savestack = c->savestack;
345	PL_savestack_ix = c->savestack_ix;
346	PL_savestack_max = c->savestack_max;
347	PL_retstack = c->retstack;
348	PL_retstack_ix = c->retstack_ix;
349	PL_retstack_max = c->retstack_max;
350	PL_curcop = c->curcop;
351	PL_top_env = c->top_env;
352		317
353	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
354	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
355	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		321	if (c->irssv)
		322	{
		323	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		324	SvREFCNT_dec (c->irssv);
		325	else
		326	{
		327	REPLACE_SV (PL_rs, c->irssv);
		328	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		329	sv_setsv (c->irssv_sv, PL_rs);
		330	}
		331	}
356		332
357	{	333	{
358	dSP;	334	dSP;
359	CV *cv;	335	CV *cv;
360		336
361	/* now do the ugly restore mess */	337	/* now do the ugly restore mess */
362	while ((cv = (CV *)POPs))	338	while ((cv = (CV *)POPs))
363	{	339	{
364	AV *padlist = (AV *)POPs;
365
366	if (padlist)
367	{
368	put_padlist (aTHX_ cv); /* mark this padlist as available */	340	put_padlist (cv); /* mark this padlist as available */
369	CvPADLIST(cv) = padlist;	341	CvDEPTH (cv) = PTR2IV (POPs);
370	}	342	CvPADLIST (cv) = (AV *)POPs;
371
372	++CvDEPTH(cv);
373	}	343	}
374		344
375	PUTBACK;	345	PUTBACK;
376	}	346	}
377	}	347	}
378		348
379	static void	349	static void
380	save_state(pTHX_ Coro__State c, int flags)	350	save_perl (Coro__State c)
381	{	351	{
382	{	352	{
383	dSP;	353	dSP;
384	I32 cxix = cxstack_ix;	354	I32 cxix = cxstack_ix;
385	PERL_CONTEXT *ccstk = cxstack;	355	PERL_CONTEXT *ccstk = cxstack;
…		…
388	/*	358	/*
389	* the worst thing you can imagine happens first - we have to save	359	* the worst thing you can imagine happens first - we have to save
390	* (and reinitialize) all cv's in the whole callchain :(	360	* (and reinitialize) all cv's in the whole callchain :(
391	*/	361	*/
392		362
		363	EXTEND (SP, 3 + 1);
393	PUSHs (Nullsv);	364	PUSHs (Nullsv);
394	/* this loop was inspired by pp_caller */	365	/* this loop was inspired by pp_caller */
395	for (;;)	366	for (;;)
396	{	367	{
397	while (cxix >= 0)	368	while (cxix >= 0)
398	{	369	{
399	PERL_CONTEXT *cx = &ccstk[cxix--];	370	PERL_CONTEXT *cx = &ccstk[cxix--];
400		371
401	if (CxTYPE(cx) == CXt_SUB)	372	if (CxTYPE (cx) == CXt_SUB)
402	{	373	{
403	CV *cv = cx->blk_sub.cv;	374	CV *cv = cx->blk_sub.cv;
		375
404	if (CvDEPTH(cv))	376	if (CvDEPTH (cv))
405	{	377	{
406	EXTEND (SP, CvDEPTH(cv)*2);	378	EXTEND (SP, 3);
407
408	while (--CvDEPTH(cv))
409	{
410	/* this tells the restore code to increment CvDEPTH */
411	PUSHs (Nullsv);
412	PUSHs ((SV *)cv);
413	}
414
415	PUSHs ((SV *)CvPADLIST(cv));	379	PUSHs ((SV *)CvPADLIST (cv));
		380	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
416	PUSHs ((SV *)cv);	381	PUSHs ((SV *)cv);
417		382
418	get_padlist (aTHX_ cv); /* this is a monster */	383	CvDEPTH (cv) = 0;
		384	get_padlist (cv);
419	}	385	}
420	}	386	}
421	#ifdef CXt_FORMAT
422	else if (CxTYPE(cx) == CXt_FORMAT)
423	{
424	/* I never used formats, so how should I know how these are implemented? */
425	/* my bold guess is as a simple, plain sub... */
426	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
427	}
428	#endif
429	}	387	}
430		388
431	if (top_si->si_type == PERLSI_MAIN)	389	if (top_si->si_type == PERLSI_MAIN)
432	break;	390	break;
433		391
…		…
437	}	395	}
438		396
439	PUTBACK;	397	PUTBACK;
440	}	398	}
441		399
442	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	400	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
443	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	401	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
444	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	402	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		403	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
445		404
446	c->dowarn = PL_dowarn;	405	#define VAR(name,type)c->name = PL_ ## name;
447	c->in_eval = PL_in_eval;	406	# include "state.h"
448		407	#undef VAR
449	c->curstackinfo = PL_curstackinfo;
450	c->curstack = PL_curstack;
451	c->mainstack = PL_mainstack;
452	c->stack_sp = PL_stack_sp;
453	c->op = PL_op;
454	c->curpad = PL_curpad;
455	c->comppad = PL_comppad;
456	c->stack_base = PL_stack_base;
457	c->stack_max = PL_stack_max;
458	c->tmps_stack = PL_tmps_stack;
459	c->tmps_floor = PL_tmps_floor;
460	c->tmps_ix = PL_tmps_ix;
461	c->tmps_max = PL_tmps_max;
462	c->markstack = PL_markstack;
463	c->markstack_ptr = PL_markstack_ptr;
464	c->markstack_max = PL_markstack_max;
465	c->scopestack = PL_scopestack;
466	c->scopestack_ix = PL_scopestack_ix;
467	c->scopestack_max = PL_scopestack_max;
468	c->savestack = PL_savestack;
469	c->savestack_ix = PL_savestack_ix;
470	c->savestack_max = PL_savestack_max;
471	c->retstack = PL_retstack;
472	c->retstack_ix = PL_retstack_ix;
473	c->retstack_max = PL_retstack_max;
474	c->curcop = PL_curcop;
475	c->top_env = PL_top_env;
476	}	408	}
477		409
478	/*	410	/*
479	* allocate various perl stacks. This is an exact copy	411	* allocate various perl stacks. This is an exact copy
480	* of perl.c:init_stacks, except that it uses less memory	412	* of perl.c:init_stacks, except that it uses less memory
481	* on the (sometimes correct) assumption that coroutines do	413	* on the (sometimes correct) assumption that coroutines do
482	* not usually need a lot of stackspace.	414	* not usually need a lot of stackspace.
483	*/	415	*/
484	STATIC void	416	#if PREFER_PERL_FUNCTIONS
		417	# define coro_init_stacks init_stacks
		418	#else
		419	static void
485	coro_init_stacks (pTHX)	420	coro_init_stacks ()
486	{	421	{
487	LOCK;
488
489	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	422	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
490	PL_curstackinfo->si_type = PERLSI_MAIN;	423	PL_curstackinfo->si_type = PERLSI_MAIN;
491	PL_curstack = PL_curstackinfo->si_stack;	424	PL_curstack = PL_curstackinfo->si_stack;
492	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	425	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
493		426
494	PL_stack_base = AvARRAY(PL_curstack);	427	PL_stack_base = AvARRAY(PL_curstack);
495	PL_stack_sp = PL_stack_base;	428	PL_stack_sp = PL_stack_base;
496	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	429	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
497		430
498	New(50,PL_tmps_stack,96,SV*);	431	New(50,PL_tmps_stack,128,SV*);
499	PL_tmps_floor = -1;	432	PL_tmps_floor = -1;
500	PL_tmps_ix = -1;	433	PL_tmps_ix = -1;
501	PL_tmps_max = 96;	434	PL_tmps_max = 128;
502		435
503	New(54,PL_markstack,16,I32);	436	New(54,PL_markstack,32,I32);
504	PL_markstack_ptr = PL_markstack;	437	PL_markstack_ptr = PL_markstack;
505	PL_markstack_max = PL_markstack + 16;	438	PL_markstack_max = PL_markstack + 32;
506		439
507	#ifdef SET_MARK_OFFSET	440	#ifdef SET_MARK_OFFSET
508	SET_MARK_OFFSET;	441	SET_MARK_OFFSET;
509	#endif	442	#endif
510		443
511	New(54,PL_scopestack,16,I32);	444	New(54,PL_scopestack,32,I32);
512	PL_scopestack_ix = 0;	445	PL_scopestack_ix = 0;
513	PL_scopestack_max = 16;	446	PL_scopestack_max = 32;
514		447
515	New(54,PL_savestack,96,ANY);	448	New(54,PL_savestack,64,ANY);
516	PL_savestack_ix = 0;	449	PL_savestack_ix = 0;
517	PL_savestack_max = 96;	450	PL_savestack_max = 64;
518		451
		452	#if !PERL_VERSION_ATLEAST (5,9,0)
519	New(54,PL_retstack,8,OP*);	453	New(54,PL_retstack,16,OP*);
520	PL_retstack_ix = 0;	454	PL_retstack_ix = 0;
521	PL_retstack_max = 8;	455	PL_retstack_max = 16;
522		456	#endif
523	UNLOCK;
524	}	457	}
		458	#endif
525		459
526	/*	460	/*
527	* destroy the stacks, the callchain etc...	461	* destroy the stacks, the callchain etc...
528	*/	462	*/
529	STATIC void	463	static void
530	destroy_stacks(pTHX)	464	coro_destroy_stacks ()
531	{	465	{
532	if (!IN_DESTRUCT)	466	if (!IN_DESTRUCT)
533	{	467	{
534	/* is this ugly, I ask? */	468	/* restore all saved variables and stuff */
535	LEAVE_SCOPE (0);	469	LEAVE_SCOPE (0);
		470	assert (PL_tmps_floor == -1);
536		471
537	/* sure it is, but more important: is it correct?? :/ */	472	/* free all temporaries */
538	FREETMPS;	473	FREETMPS;
		474	assert (PL_tmps_ix == -1);
539		475
540	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	476	POPSTACK_TO (PL_mainstack);
541	}	477	}
542		478
543	while (PL_curstackinfo->si_next)	479	while (PL_curstackinfo->si_next)
544	PL_curstackinfo = PL_curstackinfo->si_next;	480	PL_curstackinfo = PL_curstackinfo->si_next;
545		481
546	while (PL_curstackinfo)	482	while (PL_curstackinfo)
547	{	483	{
548	PERL_SI *p = PL_curstackinfo->si_prev;	484	PERL_SI *p = PL_curstackinfo->si_prev;
549		485
550	{ /*D*//*remove*/
551	dSP;
552	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
553	PUTBACK; /* possibly superfluous */
554	}
555
556	if (!IN_DESTRUCT)	486	if (!IN_DESTRUCT)
557	{
558	dounwind (-1);/*D*//*remove*/
559	SvREFCNT_dec (PL_curstackinfo->si_stack);	487	SvREFCNT_dec (PL_curstackinfo->si_stack);
560	}
561		488
562	Safefree (PL_curstackinfo->si_cxstack);	489	Safefree (PL_curstackinfo->si_cxstack);
563	Safefree (PL_curstackinfo);	490	Safefree (PL_curstackinfo);
564	PL_curstackinfo = p;	491	PL_curstackinfo = p;
565	}	492	}
566		493
567	Safefree (PL_tmps_stack);	494	Safefree (PL_tmps_stack);
568	Safefree (PL_markstack);	495	Safefree (PL_markstack);
569	Safefree (PL_scopestack);	496	Safefree (PL_scopestack);
570	Safefree (PL_savestack);	497	Safefree (PL_savestack);
		498	#if !PERL_VERSION_ATLEAST (5,9,0)
571	Safefree (PL_retstack);	499	Safefree (PL_retstack);
572	}
573
574	static void
575	allocate_stack (Coro__State ctx, int alloc)
576	{
577	coro_stack *stack;
578
579	New (0, stack, 1, coro_stack);
580
581	stack->refcnt = 1;
582	stack->usecnt = 1;
583	stack->gencnt = ctx->gencnt = 0;
584
585	if (alloc)
586	{
587	#if HAVE_MMAP
588	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
589	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
590	if (stack->sptr == (void *)-1)
591	#endif	500	#endif
592	{
593	/*FIXME*//*D*//* reasonable stack size! */
594	stack->ssize = - (8192 * sizeof (long));
595	New (0, stack->sptr, 8192, long);
596	}
597	}
598	else
599	stack->sptr = 0;
600
601	ctx->stack = stack;
602	}	501	}
603		502
604	static void	503	static void
605	deallocate_stack (Coro__State ctx)	504	setup_coro (struct coro *coro)
606	{
607	coro_stack *stack = ctx->stack;
608
609	ctx->stack = 0;
610
611	if (stack)
612	{
613	if (!--stack->refcnt)
614	{
615	#ifdef HAVE_MMAP
616	if (stack->ssize > 0 && stack->sptr)
617	munmap (stack->sptr, stack->ssize);
618	else
619	#endif
620	Safefree (stack->sptr);
621
622	Safefree (stack);
623	}
624	else if (ctx->gencnt == stack->gencnt)
625	--stack->usecnt;
626	}
627	}
628
629	static void
630	setup_coro (void *arg)
631	{	505	{
632	/*	506	/*
633	* emulate part of the perl startup here.	507	* emulate part of the perl startup here.
634	*/	508	*/
635	dTHX;	509
		510	coro_init_stacks ();
		511
		512	PL_curcop = &PL_compiling;
		513	PL_in_eval = EVAL_NULL;
		514	PL_curpm = 0;
		515	PL_localizing = 0;
		516	PL_dirty = 0;
		517	PL_restartop = 0;
		518
		519	{
		520	dSP;
		521	LOGOP myop;
		522
		523	SvREFCNT_dec (GvAV (PL_defgv));
		524	GvAV (PL_defgv) = coro->args; coro->args = 0;
		525
		526	Zero (&myop, 1, LOGOP);
		527	myop.op_next = Nullop;
		528	myop.op_flags = OPf_WANT_VOID;
		529
		530	PUSHMARK (SP);
		531	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		532	PUTBACK;
		533	PL_op = (OP *)&myop;
		534	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		535	SPAGAIN;
		536	}
		537
		538	ENTER; /* necessary e.g. for dounwind */
		539	}
		540
		541	static void
		542	free_coro_mortal ()
		543	{
		544	if (coro_mortal)
		545	{
		546	SvREFCNT_dec (coro_mortal);
		547	coro_mortal = 0;
		548	}
		549	}
		550
		551	/* inject a fake call to Coro::State::_cctx_init into the execution */
		552	static void NOINLINE
		553	prepare_cctx (coro_cctx *cctx)
		554	{
636	dSP;	555	dSP;
637	Coro__State ctx = (Coro__State)arg;	556	LOGOP myop;
638	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
639		557
640	coro_init_stacks (aTHX);	558	Zero (&myop, 1, LOGOP);
641	/*PL_curcop = 0;*/	559	myop.op_next = PL_op;
642	/*PL_in_eval = PL_in_eval;*/ /* inherit */	560	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
643	SvREFCNT_dec (GvAV (PL_defgv));
644	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
645		561
		562	PUSHMARK (SP);
		563	EXTEND (SP, 2);
		564	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		565	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		566	PUTBACK;
		567	PL_op = (OP *)&myop;
		568	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
646	SPAGAIN;	569	SPAGAIN;
647
648	if (ctx->stack)
649	{
650	ctx->cursp = 0;
651
652	PUSHMARK(SP);
653	PUTBACK;
654	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
655
656	if (SvTRUE (ERRSV))
657	croak (NULL);
658	else
659	croak ("FATAL: CCTXT coroutine returned!");
660	}
661	else
662	{
663	UNOP myop;
664
665	PL_op = (OP *)&myop;
666
667	Zero(&myop, 1, UNOP);
668	myop.op_next = Nullop;
669	myop.op_flags = OPf_WANT_VOID;
670
671	PUSHMARK(SP);
672	XPUSHs (sub_init);
673	/*
674	* the next line is slightly wrong, as PL_op->op_next
675	* is actually being executed so we skip the first op.
676	* that doesn't matter, though, since it is only
677	* pp_nextstate and we never return...
678	* ah yes, and I don't care anyways ;)
679	*/
680	PUTBACK;
681	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
682	SPAGAIN;
683
684	ENTER; /* necessary e.g. for dounwind */
685	}
686	}	570	}
687		571
688	static void	572	static void
689	continue_coro (void *arg)	573	coro_run (void *arg)
690	{	574	{
		575	/* coro_run is the alternative tail of transfer(), so unlock here. */
		576	UNLOCK;
		577
691	/*	578	/*
692	* this is a _very_ stripped down perl interpreter ;)	579	* this is a _very_ stripped down perl interpreter ;)
693	*/	580	*/
694	dTHX;
695	Coro__State ctx = (Coro__State)arg;
696	JMPENV coro_start_env;
697
698	PL_top_env = &ctx->start_env;	581	PL_top_env = &PL_start_env;
699		582
700	ctx->cursp = 0;	583	/* inject call to cctx_init */
701	PL_op = PL_op->op_next;	584	prepare_cctx ((coro_cctx *)arg);
702	CALLRUNOPS(aTHX);
703		585
		586	/* somebody will hit me for both perl_run and PL_restartop */
		587	PL_restartop = PL_op;
		588	perl_run (PL_curinterp);
		589
		590	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
704	abort ();	591	abort ();
705	}	592	}
706		593
707	STATIC void	594	static coro_cctx *
		595	cctx_new ()
		596	{
		597	coro_cctx *cctx;
		598
		599	++cctx_count;
		600
		601	Newz (0, cctx, 1, coro_cctx);
		602
		603	#if HAVE_MMAP
		604
		605	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		606	/* mmap supposedly does allocate-on-write for us */
		607	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		608
		609	if (cctx->sptr == (void *)-1)
		610	{
		611	perror ("FATAL: unable to mmap stack for coroutine");
		612	_exit (EXIT_FAILURE);
		613	}
		614
		615	# if STACKGUARD
		616	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		617	# endif
		618
		619	#else
		620
		621	cctx->ssize = STACKSIZE * (long)sizeof (long);
		622	New (0, cctx->sptr, STACKSIZE, long);
		623
		624	if (!cctx->sptr)
		625	{
		626	perror ("FATAL: unable to malloc stack for coroutine");
		627	_exit (EXIT_FAILURE);
		628	}
		629
		630	#endif
		631
		632	#if USE_VALGRIND
		633	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		634	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		635	cctx->ssize + (char *)cctx->sptr
		636	);
		637	#endif
		638
		639	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		640
		641	return cctx;
		642	}
		643
		644	static void
		645	cctx_destroy (coro_cctx *cctx)
		646	{
		647	if (!cctx)
		648	return;
		649
		650	--cctx_count;
		651
		652	#if USE_VALGRIND
		653	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		654	#endif
		655
		656	#if HAVE_MMAP
		657	munmap (cctx->sptr, cctx->ssize);
		658	#else
		659	Safefree (cctx->sptr);
		660	#endif
		661
		662	Safefree (cctx);
		663	}
		664
		665	static coro_cctx *
		666	cctx_get ()
		667	{
		668	coro_cctx *cctx;
		669
		670	if (cctx_first)
		671	{
		672	cctx = cctx_first;
		673	cctx_first = cctx->next;
		674	--cctx_idle;
		675	}
		676	else
		677	{
		678	cctx = cctx_new ();
		679	PL_op = PL_op->op_next;
		680	}
		681
		682	return cctx;
		683	}
		684
		685	static void
		686	cctx_put (coro_cctx *cctx)
		687	{
		688	/* free another cctx if overlimit */
		689	if (cctx_idle >= MAX_IDLE_CCTX)
		690	{
		691	coro_cctx *first = cctx_first;
		692	cctx_first = first->next;
		693	--cctx_idle;
		694
		695	assert (!first->inuse);
		696	cctx_destroy (first);
		697	}
		698
		699	++cctx_idle;
		700	cctx->next = cctx_first;
		701	cctx_first = cctx;
		702	}
		703
		704	/* never call directly, always through the coro_state_transfer global variable */
		705	static void NOINLINE
708	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	706	transfer (struct coro *prev, struct coro *next)
709	{	707	{
710	dSTACKLEVEL;	708	dSTACKLEVEL;
711		709
		710	/* sometimes transfer is only called to set idle_sp */
		711	if (!next)
		712	{
		713	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		714	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		715	}
712	if (prev != next)	716	else if (prev != next)
713	{	717	{
714	if (next->mainstack)	718	coro_cctx *prev__cctx;
		719
		720	if (prev->flags & CF_NEW)
715	{	721	{
716	LOCK;	722	/* create a new empty context */
717	SAVE (prev, flags);	723	Newz (0, prev->cctx, 1, coro_cctx);
718	LOAD (next);	724	prev->cctx->inuse = 1;
719	UNLOCK;	725	prev->flags &= ~CF_NEW;
720		726	prev->flags |= CF_RUNNING;
721	/* mark this state as in-use */
722	next->mainstack = 0;
723	next->tmps_ix = -2;
724
725	/* stacklevel changed? if yes, grab the stack for us! */
726	if (flags & TRANSFER_SAVE_CCTXT)
727	{
728	if (!prev->stack)
729	allocate_stack (prev, 0);
730	else if (prev->cursp != stacklevel
731	&& prev->stack->usecnt > 1)
732	{
733	prev->gencnt = ++prev->stack->gencnt;
734	prev->stack->usecnt = 1;
735	}
736
737	/* has our stack been invalidated? */
738	if (next->stack && next->stack->gencnt != next->gencnt)
739	{
740	deallocate_stack (next);
741	allocate_stack (next, 1);
742	coro_create (&(next->stack->cctx),
743	continue_coro, (void *)next,
744	next->stack->sptr, labs (next->stack->ssize));
745	}
746
747	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
748	prev->cursp = stacklevel;
749	/* don't add any code here */
750	}
751	else
752	next->cursp = stacklevel;
753	}	727	}
754	else if (next->tmps_ix == -2)	728
755	croak ("tried to transfer to running coroutine");	729	/*TODO: must not croak here */
		730	if (!prev->flags & CF_RUNNING)
		731	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		732
		733	if (next->flags & CF_RUNNING)
		734	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		735
		736	prev->flags &= ~CF_RUNNING;
		737	next->flags |= CF_RUNNING;
		738
		739	LOCK;
		740
		741	if (next->flags & CF_NEW)
		742	{
		743	/* need to start coroutine */
		744	next->flags &= ~CF_NEW;
		745	/* first get rid of the old state */
		746	save_perl (prev);
		747	/* setup coroutine call */
		748	setup_coro (next);
		749	/* need a new stack */
		750	assert (!next->cctx);
		751	}
756	else	752	else
757	{	753	{
758	LOCK;	754	/* coroutine already started */
759	SAVE (prev, -1); /* first get rid of the old state */	755	save_perl (prev);
760	UNLOCK;	756	load_perl (next);
761
762	if (flags & TRANSFER_SAVE_CCTXT)
763	{
764	if (!prev->stack)
765	allocate_stack (prev, 0);
766
767	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
768	{
769	PL_top_env = &next->start_env;
770
771	setup_coro (next);
772	next->cursp = stacklevel;
773
774	prev->stack->refcnt++;
775	prev->stack->usecnt++;
776	next->stack = prev->stack;
777	next->gencnt = prev->gencnt;
778	}
779	else
780	{
781	assert (!next->stack);
782	allocate_stack (next, 1);
783	coro_create (&(next->stack->cctx),
784	setup_coro, (void *)next,
785	next->stack->sptr, labs (next->stack->ssize));
786	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
787	prev->cursp = stacklevel;
788	/* don't add any code here */
789	}
790	}
791	else
792	{
793	setup_coro (next);
794	next->cursp = stacklevel;
795	}
796	}	757	}
797	}
798		758
799	LOCK;	759	prev__cctx = prev->cctx;
800	if (coro_mortal)	760
801	{	761	/* possibly "free" the cctx */
802	SvREFCNT_dec (coro_mortal);	762	if (prev__cctx->idle_sp == STACKLEVEL)
		763	{
		764	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		765	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		766
		767	prev->cctx = 0;
		768
		769	cctx_put (prev__cctx);
		770	prev__cctx->inuse = 0;
		771	}
		772
		773	if (!next->cctx)
		774	{
		775	next->cctx = cctx_get ();
		776	assert (!next->cctx->inuse);
		777	next->cctx->inuse = 1;
		778	}
		779
		780	if (prev__cctx != next->cctx)
		781	{
		782	prev__cctx->top_env = PL_top_env;
		783	PL_top_env = next->cctx->top_env;
		784	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		785	}
		786
803	coro_mortal = 0;	787	free_coro_mortal ();
804	}	788
805	UNLOCK;	789	UNLOCK;
		790	}
806	}	791	}
807		792
808	#define SV_CORO(sv,func) \	793	struct transfer_args
809	do { \	794	{
810	if (SvROK (sv)) \	795	struct coro *prev, *next;
811	sv = SvRV (sv); \	796	};
812	\
813	if (SvTYPE (sv) == SVt_PVHV) \
814	{ \
815	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
816	\
817	if (!he) \
818	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
819	\
820	(sv) = SvRV (HeVAL(he)); \
821	} \
822	\
823	/* must also be changed inside Coro::Cont::yield */ \
824	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
825	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
826	\
827	} while(0)
828		797
829	#define SvSTATE(sv) (struct coro *)SvIV (sv)	798	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
830		799
		800	static void
		801	coro_state_destroy (struct coro *coro)
		802	{
		803	if (coro->refcnt--)
		804	return;
		805
		806	if (coro->mainstack && coro->mainstack != main_mainstack)
		807	{
		808	struct coro temp;
		809	Zero (&temp, 1, struct coro);
		810	temp.save = CORO_SAVE_ALL;
		811
		812	if (coro->flags & CF_RUNNING)
		813	croak ("FATAL: tried to destroy currently running coroutine");
		814
		815	save_perl (&temp);
		816	load_perl (coro);
		817
		818	coro_destroy_stacks ();
		819
		820	load_perl (&temp); /* this will get rid of defsv etc.. */
		821
		822	coro->mainstack = 0;
		823	}
		824
		825	cctx_destroy (coro->cctx);
		826	SvREFCNT_dec (coro->args);
		827	Safefree (coro);
		828	}
		829
831	static void	830	static int
		831	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		832	{
		833	struct coro *coro = (struct coro *)mg->mg_ptr;
		834	mg->mg_ptr = 0;
		835
		836	coro_state_destroy (coro);
		837
		838	return 0;
		839	}
		840
		841	static int
		842	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		843	{
		844	struct coro *coro = (struct coro *)mg->mg_ptr;
		845
		846	++coro->refcnt;
		847
		848	return 0;
		849	}
		850
		851	static MGVTBL coro_state_vtbl = {
		852	0, 0, 0, 0,
		853	coro_state_clear,
		854	0,
		855	#ifdef MGf_DUP
		856	coro_state_dup,
		857	#else
		858	# define MGf_DUP 0
		859	#endif
		860	};
		861
		862	static struct coro *
		863	SvSTATE (SV *coro)
		864	{
		865	HV *stash;
		866	MAGIC *mg;
		867
		868	if (SvROK (coro))
		869	coro = SvRV (coro);
		870
		871	stash = SvSTASH (coro);
		872	if (stash != coro_stash && stash != coro_state_stash)
		873	{
		874	/* very slow, but rare, check */
		875	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		876	croak ("Coro::State object required");
		877	}
		878
		879	mg = SvMAGIC (coro);
		880	assert (mg->mg_type == PERL_MAGIC_ext);
		881	return (struct coro *)mg->mg_ptr;
		882	}
		883
		884	static void
		885	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		886	{
		887	ta->prev = SvSTATE (prev_sv);
		888	ta->next = SvSTATE (next_sv);
		889	}
		890
		891	static void
832	api_transfer(pTHX_ SV *prev, SV *next, int flags)	892	api_transfer (SV *prev_sv, SV *next_sv)
833	{	893	{
834	SV_CORO (prev, "Coro::transfer");	894	struct transfer_args ta;
835	SV_CORO (next, "Coro::transfer");
836		895
837	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	896	prepare_transfer (&ta, prev_sv, next_sv);
		897	TRANSFER (ta);
		898	}
		899
		900	static int
		901	api_save (SV *coro_sv, int new_save)
		902	{
		903	struct coro *coro = SvSTATE (coro_sv);
		904	int old_save = coro->save;
		905
		906	if (new_save >= 0)
		907	coro->save = new_save;
		908
		909	return old_save;
838	}	910	}
839		911
840	/** Coro ********************************************************************/	912	/** Coro ********************************************************************/
841		913
842	#define PRIO_MAX 3	914	#define PRIO_MAX 3
…		…
845	#define PRIO_LOW -1	917	#define PRIO_LOW -1
846	#define PRIO_IDLE -3	918	#define PRIO_IDLE -3
847	#define PRIO_MIN -4	919	#define PRIO_MIN -4
848		920
849	/* for Coro.pm */	921	/* for Coro.pm */
850	static GV *coro_current, *coro_idle;	922	static SV *coro_current;
851	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	923	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
852	static int coro_nready;	924	static int coro_nready;
853		925
854	static void	926	static void
855	coro_enq (pTHX_ SV *sv)	927	coro_enq (SV *coro_sv)
856	{	928	{
857	if (SvTYPE (sv) == SVt_PVHV)
858	{
859	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
860	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
861
862	prio = prio > PRIO_MAX ? PRIO_MAX
863	: prio < PRIO_MIN ? PRIO_MIN
864	: prio;
865
866	av_push (coro_ready [prio - PRIO_MIN], sv);	929	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
867	coro_nready++;	930	coro_nready++;
868
869	return;
870	}
871
872	croak ("Coro::ready tried to enqueue something that is not a coroutine");
873	}	931	}
874		932
875	static SV *	933	static SV *
876	coro_deq (pTHX_ int min_prio)	934	coro_deq (int min_prio)
877	{	935	{
878	int prio = PRIO_MAX - PRIO_MIN;	936	int prio = PRIO_MAX - PRIO_MIN;
879		937
880	min_prio -= PRIO_MIN;	938	min_prio -= PRIO_MIN;
881	if (min_prio < 0)	939	if (min_prio < 0)
882	min_prio = 0;	940	min_prio = 0;
883		941
884	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	942	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
885	if (av_len (coro_ready[prio]) >= 0)	943	if (AvFILLp (coro_ready [prio]) >= 0)
886	{	944	{
887	coro_nready--;	945	coro_nready--;
888	return av_shift (coro_ready[prio]);	946	return av_shift (coro_ready [prio]);
889	}	947	}
890		948
891	return 0;	949	return 0;
892	}	950	}
893		951
894	static void	952	static int
895	api_ready (SV *coro)	953	api_ready (SV *coro_sv)
896	{	954	{
897	dTHX;	955	struct coro *coro;
898		956
899	if (SvROK (coro))	957	if (SvROK (coro_sv))
900	coro = SvRV (coro);	958	coro_sv = SvRV (coro_sv);
		959
		960	coro = SvSTATE (coro_sv);
		961
		962	if (coro->flags & CF_READY)
		963	return 0;
		964
		965	coro->flags |= CF_READY;
901		966
902	LOCK;	967	LOCK;
903	coro_enq (aTHX_ SvREFCNT_inc (coro));	968	coro_enq (SvREFCNT_inc (coro_sv));
904	UNLOCK;	969	UNLOCK;
		970
		971	return 1;
		972	}
		973
		974	static int
		975	api_is_ready (SV *coro_sv)
		976	{
		977	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		978	}
		979
		980	static void
		981	prepare_schedule (struct transfer_args *ta)
		982	{
		983	SV *prev, *next;
		984
		985	for (;;)
		986	{
		987	LOCK;
		988	next = coro_deq (PRIO_MIN);
		989	UNLOCK;
		990
		991	if (next)
		992	break;
		993
		994	{
		995	dSP;
		996
		997	ENTER;
		998	SAVETMPS;
		999
		1000	PUSHMARK (SP);
		1001	PUTBACK;
		1002	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1003
		1004	FREETMPS;
		1005	LEAVE;
		1006	}
		1007	}
		1008
		1009	prev = SvRV (coro_current);
		1010	SvRV_set (coro_current, next);
		1011
		1012	/* free this only after the transfer */
		1013	LOCK;
		1014	free_coro_mortal ();
		1015	UNLOCK;
		1016	coro_mortal = prev;
		1017
		1018	assert (!SvROK(prev));//D
		1019	assert (!SvROK(next));//D
		1020
		1021	ta->prev = SvSTATE (prev);
		1022	ta->next = SvSTATE (next);
		1023
		1024	assert (ta->next->flags & CF_READY);
		1025	ta->next->flags &= ~CF_READY;
		1026	}
		1027
		1028	static void
		1029	prepare_cede (struct transfer_args *ta)
		1030	{
		1031	api_ready (coro_current);
		1032	prepare_schedule (ta);
		1033	}
		1034
		1035	static int
		1036	prepare_cede_notself (struct transfer_args *ta)
		1037	{
		1038	if (coro_nready)
		1039	{
		1040	SV *prev = SvRV (coro_current);
		1041	prepare_schedule (ta);
		1042	api_ready (prev);
		1043	return 1;
		1044	}
		1045	else
		1046	return 0;
905	}	1047	}
906		1048
907	static void	1049	static void
908	api_schedule (void)	1050	api_schedule (void)
909	{	1051	{
910	dTHX;	1052	struct transfer_args ta;
911		1053
912	SV *prev, *next;	1054	prepare_schedule (&ta);
913		1055	TRANSFER (ta);
914	LOCK;
915
916	prev = SvRV (GvSV (coro_current));
917	next = coro_deq (aTHX_ PRIO_MIN);
918
919	if (!next)
920	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
921
922	/* free this only after the transfer */
923	coro_mortal = prev;
924	SV_CORO (prev, "Coro::schedule");
925
926	SvRV (GvSV (coro_current)) = next;
927
928	SV_CORO (next, "Coro::schedule");
929
930	UNLOCK;
931
932	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
933	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
934	}	1056	}
935		1057
936	static void	1058	static int
937	api_cede (void)	1059	api_cede (void)
938	{	1060	{
939	dTHX;	1061	struct transfer_args ta;
940		1062
941	LOCK;	1063	prepare_cede (&ta);
942	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
943	UNLOCK;
944		1064
945	api_schedule ();	1065	if (ta.prev != ta.next)
		1066	{
		1067	TRANSFER (ta);
		1068	return 1;
		1069	}
		1070	else
		1071	return 0;
		1072	}
		1073
		1074	static int
		1075	api_cede_notself (void)
		1076	{
		1077	struct transfer_args ta;
		1078
		1079	if (prepare_cede_notself (&ta))
		1080	{
		1081	TRANSFER (ta);
		1082	return 1;
		1083	}
		1084	else
		1085	return 0;
946	}	1086	}
947		1087
948	MODULE = Coro::State PACKAGE = Coro::State	1088	MODULE = Coro::State PACKAGE = Coro::State
949		1089
950	PROTOTYPES: ENABLE	1090	PROTOTYPES: DISABLE
951		1091
952	BOOT:	1092	BOOT:
953	{ /* {} necessary for stoopid perl-5.6.x */	1093	{
954	#ifdef USE_ITHREADS	1094	#ifdef USE_ITHREADS
955	MUTEX_INIT (&coro_mutex);	1095	MUTEX_INIT (&coro_mutex);
956	#endif	1096	#endif
		1097	BOOT_PAGESIZE;
957		1098
958	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
959	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
960	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1099	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
961		1100
962	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1101	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
963	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1102	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
964	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1103	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1104	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
965	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1105	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
966		1106
967	main_mainstack = PL_mainstack;	1107	main_mainstack = PL_mainstack;
968		1108
969	coroapi.ver = CORO_API_VERSION;	1109	coroapi.ver = CORO_API_VERSION;
970	coroapi.transfer = api_transfer;	1110	coroapi.transfer = api_transfer;
971	}
972		1111
973	Coro::State	1112	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
974	_newprocess(args)	1113	}
975	SV * args	1114
976	PROTOTYPE: $	1115	SV *
		1116	new (char *klass, ...)
977	CODE:	1117	CODE:
978	Coro__State coro;	1118	{
		1119	struct coro *coro;
		1120	HV *hv;
		1121	int i;
979		1122
980	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
981	croak ("Coro::State::_newprocess expects an arrayref");
982
983	Newz (0, coro, 1, struct coro);	1123	Newz (0, coro, 1, struct coro);
		1124	coro->args = newAV ();
		1125	coro->save = CORO_SAVE_ALL;
		1126	coro->flags = CF_NEW;
984		1127
985	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1128	hv = newHV ();
986	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1129	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
987	/*coro->stack = 0;*/	1130	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
988		1131
989	/* same as JMPENV_BOOTSTRAP */	1132	for (i = 1; i < items; i++)
990	/* we might be able to recycle start_env, but safe is safe */	1133	av_push (coro->args, newSVsv (ST (i)));
991	/*Zero(&coro->start_env, 1, JMPENV);*/	1134	}
992	coro->start_env.je_ret = -1;
993	coro->start_env.je_mustcatch = TRUE;
994
995	RETVAL = coro;
996	OUTPUT:	1135	OUTPUT:
997	RETVAL	1136	RETVAL
998		1137
		1138	int
		1139	save (SV *coro, int new_save = -1)
		1140	CODE:
		1141	RETVAL = api_save (coro, new_save);
		1142	OUTPUT:
		1143	RETVAL
		1144
999	void	1145	void
1000	transfer(prev, next, flags)	1146	_set_stacklevel (...)
1001	SV *prev	1147	ALIAS:
1002	SV *next	1148	Coro::State::transfer = 1
1003	int flags	1149	Coro::schedule = 2
1004	PROTOTYPE: @	1150	Coro::cede = 3
		1151	Coro::cede_notself = 4
1005	CODE:	1152	CODE:
1006	PUTBACK;	1153	{
1007	SV_CORO (next, "Coro::transfer");	1154	struct transfer_args ta;
1008	SV_CORO (prev, "Coro::transfer");	1155
1009	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1156	switch (ix)
1010	SPAGAIN;	1157	{
		1158	case 0:
		1159	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1160	ta.next = 0;
		1161	break;
		1162
		1163	case 1:
		1164	if (items != 2)
		1165	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1166
		1167	prepare_transfer (&ta, ST (0), ST (1));
		1168	break;
		1169
		1170	case 2:
		1171	prepare_schedule (&ta);
		1172	break;
		1173
		1174	case 3:
		1175	prepare_cede (&ta);
		1176	break;
		1177
		1178	case 4:
		1179	if (!prepare_cede_notself (&ta))
		1180	XSRETURN_EMPTY;
		1181
		1182	break;
		1183	}
		1184
		1185	BARRIER;
		1186	TRANSFER (ta);
		1187	}
1011		1188
1012	void	1189	void
1013	DESTROY(coro)	1190	_clone_state_from (SV *dst, SV *src)
1014	Coro::State coro	1191	CODE:
1015	CODE:	1192	{
		1193	struct coro *coro_src = SvSTATE (src);
1016		1194
1017	if (coro->mainstack && coro->mainstack != main_mainstack)	1195	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1018	{
1019	struct coro temp;
1020		1196
1021	PUTBACK;	1197	++coro_src->refcnt;
1022	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1198	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1023	LOAD (aTHX_ coro);	1199	}
1024	SPAGAIN;
1025
1026	destroy_stacks (aTHX);
1027
1028	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1029	SPAGAIN;
1030
1031	coro->mainstack = 0;
1032	}
1033
1034	deallocate_stack (coro);
1035	SvREFCNT_dec (coro->args);
1036	Safefree (coro);
1037		1200
1038	void	1201	void
1039	_exit(code)	1202	_exit (code)
1040	int code	1203	int code
1041	PROTOTYPE: $	1204	PROTOTYPE: $
1042	CODE:	1205	CODE:
1043	_exit (code);	1206	_exit (code);
1044		1207
1045	MODULE = Coro::State PACKAGE = Coro::Cont	1208	int
		1209	cctx_count ()
		1210	CODE:
		1211	RETVAL = cctx_count;
		1212	OUTPUT:
		1213	RETVAL
1046		1214
1047	# this is slightly dirty (should expose a c-level api)	1215	int
1048		1216	cctx_idle ()
1049	void	1217	CODE:
1050	yield(...)	1218	RETVAL = cctx_idle;
1051	PROTOTYPE: @	1219	OUTPUT:
1052	CODE:	1220	RETVAL
1053	static SV *returnstk;
1054	SV *sv;
1055	AV *defav = GvAV (PL_defgv);
1056	struct coro *prev, *next;
1057
1058	if (!returnstk)
1059	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1060
1061	/* set up @_ -- ugly */
1062	av_clear (defav);
1063	av_fill (defav, items - 1);
1064	while (items--)
1065	av_store (defav, items, SvREFCNT_inc (ST(items)));
1066
1067	SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1068	sv = av_pop ((AV *)SvRV (returnstk));
1069	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1070	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1071	SvREFCNT_dec (sv);
1072
1073	transfer (aTHX_ prev, next, 0);
1074		1221
1075	MODULE = Coro::State PACKAGE = Coro	1222	MODULE = Coro::State PACKAGE = Coro
1076		1223
1077	# this is slightly dirty (should expose a c-level api)
1078
1079	BOOT:	1224	BOOT:
1080	{	1225	{
1081	int i;	1226	int i;
		1227
1082	HV *stash = gv_stashpv ("Coro", TRUE);	1228	coro_stash = gv_stashpv ("Coro", TRUE);
1083		1229
1084	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1230	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1085	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1231	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1086	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1232	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1087	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1233	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1088	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1234	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1089	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1235	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1090		1236
1091	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1237	coro_current = get_sv ("Coro::current", FALSE);
1092	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1238	SvREADONLY_on (coro_current);
1093		1239
1094	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1240	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1095	coro_ready[i] = newAV ();	1241	coro_ready[i] = newAV ();
1096		1242
1097	{	1243	{
1098	SV *sv = perl_get_sv("Coro::API", 1);	1244	SV *sv = perl_get_sv("Coro::API", 1);
1099		1245
1100	coroapi.schedule = api_schedule;	1246	coroapi.schedule = api_schedule;
		1247	coroapi.save = api_save;
1101	coroapi.cede = api_cede;	1248	coroapi.cede = api_cede;
		1249	coroapi.cede_notself = api_cede_notself;
1102	coroapi.ready = api_ready;	1250	coroapi.ready = api_ready;
		1251	coroapi.is_ready = api_is_ready;
1103	coroapi.nready = &coro_nready;	1252	coroapi.nready = &coro_nready;
1104	coroapi.current = coro_current;	1253	coroapi.current = coro_current;
1105		1254
1106	GCoroAPI = &coroapi;	1255	GCoroAPI = &coroapi;
1107	sv_setiv(sv, (IV)&coroapi);	1256	sv_setiv (sv, (IV)&coroapi);
1108	SvREADONLY_on(sv);	1257	SvREADONLY_on (sv);
1109	}	1258	}
1110	}	1259	}
1111		1260
1112	#if !PERL_MICRO
1113
1114	void	1261	void
1115	ready(self)	1262	_set_current (SV *current)
1116	SV * self
1117	PROTOTYPE: $	1263	PROTOTYPE: $
1118	CODE:	1264	CODE:
1119	api_ready (self);	1265	SvREFCNT_dec (SvRV (coro_current));
1120		1266	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1121	#endif
1122		1267
1123	int	1268	int
		1269	prio (Coro::State coro, int newprio = 0)
		1270	ALIAS:
		1271	nice = 1
		1272	CODE:
		1273	{
		1274	RETVAL = coro->prio;
		1275
		1276	if (items > 1)
		1277	{
		1278	if (ix)
		1279	newprio = coro->prio - newprio;
		1280
		1281	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1282	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1283
		1284	coro->prio = newprio;
		1285	}
		1286	}
		1287	OUTPUT:
		1288	RETVAL
		1289
		1290	SV *
		1291	ready (SV *self)
		1292	PROTOTYPE: $
		1293	CODE:
		1294	RETVAL = boolSV (api_ready (self));
		1295	OUTPUT:
		1296	RETVAL
		1297
		1298	SV *
		1299	is_ready (SV *self)
		1300	PROTOTYPE: $
		1301	CODE:
		1302	RETVAL = boolSV (api_is_ready (self));
		1303	OUTPUT:
		1304	RETVAL
		1305
		1306	int
1124	nready(...)	1307	nready (...)
1125	PROTOTYPE:	1308	PROTOTYPE:
1126	CODE:	1309	CODE:
1127	RETVAL = coro_nready;	1310	RETVAL = coro_nready;
1128	OUTPUT:	1311	OUTPUT:
1129	RETVAL	1312	RETVAL
1130		1313
		1314	MODULE = Coro::State PACKAGE = Coro::AIO
		1315
		1316	SV *
		1317	_get_state ()
		1318	CODE:
		1319	{
		1320	struct io_state *data;
		1321
		1322	RETVAL = newSV (sizeof (struct io_state));
		1323	data = (struct io_state *)SvPVX (RETVAL);
		1324	SvCUR_set (RETVAL, sizeof (struct io_state));
		1325	SvPOK_only (RETVAL);
		1326
		1327	data->errorno = errno;
		1328	data->laststype = PL_laststype;
		1329	data->laststatval = PL_laststatval;
		1330	data->statcache = PL_statcache;
		1331	}
		1332	OUTPUT:
		1333	RETVAL
		1334
1131	void	1335	void
1132	schedule(...)	1336	_set_state (char *data_)
1133	PROTOTYPE:	1337	PROTOTYPE: $
1134	CODE:	1338	CODE:
1135	api_schedule ();	1339	{
		1340	struct io_state *data = (void *)data_;
1136		1341
1137	void	1342	errno = data->errorno;
1138	cede(...)	1343	PL_laststype = data->laststype;
1139	PROTOTYPE:	1344	PL_laststatval = data->laststatval;
1140	CODE:	1345	PL_statcache = data->statcache;
1141	api_cede ();	1346	}
1142		1347

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