ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.30 by root, Sat Aug 25 22:19:05 2001 UTC vs.
Revision 1.132 by root, Fri Dec 29 13:03:05 2006 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_ANON
13	# ifdef MAP_ANONYMOUS	16	# ifndef MAP_ANONYMOUS
14	# define MAP_ANON MAP_ANONYMOUS	17	# ifdef 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	#endif
22		39
23	#define SUB_INIT "Coro::State::initialize"	40	/* the maximum number of idle cctx that will be pooled */
24	#define UCORO_STATE "_coro_state"	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)
		50	# ifndef PL_ppaddr
		51	# define PL_ppaddr ppaddr
		52	# endif
		53	# ifndef call_sv
		54	# define call_sv perl_call_sv
		55	# endif
		56	# ifndef get_sv
		57	# define get_sv perl_get_sv
		58	# endif
		59	# ifndef get_cv
		60	# define get_cv perl_get_cv
		61	# endif
		62	# ifndef IS_PADGV
		63	# define IS_PADGV(v) 0
		64	# endif
		65	# ifndef IS_PADCONST
		66	# define IS_PADCONST(v) 0
		67	# endif
		68	#endif
		69
		70	/* 5.8.7 */
		71	#ifndef SvRV_set
		72	# define SvRV_set(s,v) SvRV(s) = (v)
		73	#endif
		74
		75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		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
25		87
26	/* 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
27	* 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
28	* and should be unique. */	90	* and should be unique. */
		91	#define dSTACKLEVEL int stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	92	#define STACKLEVEL ((void *)&stacklevel)
30		93
31	#define labs(l) ((l) >= 0 ? (l) : -(l))	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		95
		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))
32		105
33	#include "CoroAPI.h"	106	#include "CoroAPI.h"
34		107
		108	#ifdef USE_ITHREADS
		109	static perl_mutex coro_mutex;
		110	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		111	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		112	#else
		113	# define LOCK (void)0
		114	# define UNLOCK (void)0
		115	#endif
		116
		117	struct io_state
		118	{
		119	int errorno;
		120	I32 laststype;
		121	int laststatval;
		122	Stat_t statcache;
		123	};
		124
35	static struct CoroAPI coroapi;	125	static struct CoroAPI coroapi;
		126	static AV *main_mainstack; /* used to differentiate between $main and others */
		127	static HV *coro_state_stash, *coro_stash;
		128	static SV *coro_mortal; /* will be freed after next transfer */
36		129
37	/* 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 */
38	typedef struct {	134	typedef struct coro_cctx {
39	int refcnt; /* pointer reference counter */	135	struct coro_cctx *next;
40	int usecnt; /* shared by how many coroutines */
41	int gencnt; /* generation counter */
42		136
43	coro_context cctx;	137	/* the stack */
44
45	void *sptr;	138	void *sptr;
46	long ssize; /* positive == mmap, otherwise malloc */	139	long ssize; /* positive == mmap, otherwise malloc */
47	} coro_stack;
48		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 */
49	struct coro {	161	struct coro {
50	/* the optional C context */	162	/* the c coroutine allocated to this perl coroutine, if any */
51	coro_stack *stack;	163	coro_cctx *cctx;
52	void *cursp;
53	int gencnt;
54
55	/* optionally saved, might be zero */
56	AV *defav;
57	SV *defsv;
58	SV *errsv;
59
60	/* saved global state not related to stacks */
61	U8 dowarn;
62	I32 in_eval;
63
64	/* the stacks and related info (callchain etc..) */
65	PERL_SI *curstackinfo;
66	AV *curstack;
67	AV *mainstack;
68	SV **stack_sp;
69	OP *op;
70	SV **curpad;
71	SV **stack_base;
72	SV **stack_max;
73	SV **tmps_stack;
74	I32 tmps_floor;
75	I32 tmps_ix;
76	I32 tmps_max;
77	I32 *markstack;
78	I32 *markstack_ptr;
79	I32 *markstack_max;
80	I32 *scopestack;
81	I32 scopestack_ix;
82	I32 scopestack_max;
83	ANY *savestack;
84	I32 savestack_ix;
85	I32 savestack_max;
86	OP **retstack;
87	I32 retstack_ix;
88	I32 retstack_max;
89	COP *curcop;
90	JMPENV *top_env;
91		164
92	/* data associated with this coroutine (initial args) */	165	/* data associated with this coroutine (initial args) */
93	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;
94	};	184	};
95		185
96	typedef struct coro *Coro__State;	186	typedef struct coro *Coro__State;
97	typedef struct coro *Coro__State_or_hashref;	187	typedef struct coro *Coro__State_or_hashref;
98		188
99	static AV *main_mainstack; /* used to differentiate between $main and others */	189	static AV *
100	static HV *coro_state_stash;	190	coro_clone_padlist (CV *cv)
101	static SV *ucoro_state_sv;
102	static U32 ucoro_state_hash;
103	static HV *padlist_cache;
104
105	/* mostly copied from op.c:cv_clone2 */
106	STATIC AV *
107	clone_padlist (AV *protopadlist)
108	{	191	{
109	AV *av;	192	AV *padlist = CvPADLIST (cv);
110	I32 ix;
111	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
112	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
113	SV **pname = AvARRAY (protopad_name);
114	SV **ppad = AvARRAY (protopad);
115	I32 fname = AvFILLp (protopad_name);
116	I32 fpad = AvFILLp (protopad);
117	AV *newpadlist, *newpad_name, *newpad;	193	AV *newpadlist, *newpad;
118	SV **npad;
119
120	newpad_name = newAV ();
121	for (ix = fname; ix >= 0; ix--)
122	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124	newpad = newAV ();
125	av_fill (newpad, AvFILLp (protopad));
126	npad = AvARRAY (newpad);
127		194
128	newpadlist = newAV ();	195	newpadlist = newAV ();
129	AvREAL_off (newpadlist);	196	AvREAL_off (newpadlist);
130	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)));
131	av_store (newpadlist, 1, (SV *) newpad);	206	av_store (newpadlist, 1, (SV *)newpad);
132		207
133	av = newAV (); /* will be @_ */	208	return newpadlist;
134	av_extend (av, 0);	209	}
135	av_store (newpad, 0, (SV *) av);
136	AvFLAGS (av) = AVf_REIFY;
137		210
138	for (ix = fpad; ix > 0; ix--)	211	static void
		212	free_padlist (AV *padlist)
		213	{
		214	/* may be during global destruction */
		215	if (SvREFCNT (padlist))
139	{	216	{
140	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	217	I32 i = AvFILLp (padlist);
141	if (namesv && namesv != &PL_sv_undef)	218	while (i >= 0)
142	{	219	{
143	char *name = SvPVX (namesv); /* XXX */	220	SV **svp = av_fetch (padlist, i--, FALSE);
144	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	221	if (svp)
145	{ /* lexical from outside? */
146	npad[ix] = SvREFCNT_inc (ppad[ix]);
147	}	222	{
148	else
149	{ /* our own lexical */
150	SV *sv;	223	SV *sv;
151	if (*name == '&')	224	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
152	sv = SvREFCNT_inc (ppad[ix]);	225	SvREFCNT_dec (sv);
153	else if (*name == '@')	226
154	sv = (SV *) newAV ();	227	SvREFCNT_dec (*svp);
155	else if (*name == '%')
156	sv = (SV *) newHV ();
157	else
158	sv = NEWSV (0, 0);
159	if (!SvPADBUSY (sv))
160	SvPADMY_on (sv);
161	npad[ix] = sv;
162	}	228	}
163	}	229	}
164	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
165	{
166	npad[ix] = SvREFCNT_inc (ppad[ix]);
167	}
168	else
169	{
170	SV *sv = NEWSV (0, 0);
171	SvPADTMP_on (sv);
172	npad[ix] = sv;
173	}
174	}
175		230
176	#if 0 /* return -ENOTUNDERSTOOD */
177	/* Now that vars are all in place, clone nested closures. */
178
179	for (ix = fpad; ix > 0; ix--) {
180	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181	if (namesv
182	&& namesv != &PL_sv_undef
183	&& !(SvFLAGS(namesv) & SVf_FAKE)
184	&& *SvPVX(namesv) == '&'
185	&& CvCLONE(ppad[ix]))
186	{
187	CV *kid = cv_clone((CV*)ppad[ix]);
188	SvREFCNT_dec(ppad[ix]);
189	CvCLONE_on(kid);
190	SvPADMY_on(kid);
191	npad[ix] = (SV*)kid;
192	}
193	}
194	#endif
195
196	return newpadlist;
197	}
198
199	#ifdef MAY_FLUSH
200	STATIC void
201	free_padlist (AV *padlist)
202	{
203	/* may be during global destruction */
204	if (SvREFCNT(padlist))
205	{
206	I32 i = AvFILLp(padlist);
207	while (i >= 0)
208	{
209	SV **svp = av_fetch(padlist, i--, FALSE);
210	SV *sv = svp ? *svp : Nullsv;
211	if (sv)
212	SvREFCNT_dec(sv);
213	}
214
215	SvREFCNT_dec((SV*)padlist);	231	SvREFCNT_dec ((SV*)padlist);
216	}	232	}
217	}	233	}
218	#endif	234
		235	static int
		236	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		237	{
		238	AV *padlist;
		239	AV *av = (AV *)mg->mg_obj;
		240
		241	/* casting is fun. */
		242	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
		243	free_padlist (padlist);
		244
		245	SvREFCNT_dec (av);
		246
		247	return 0;
		248	}
		249
		250	#define PERL_MAGIC_coro PERL_MAGIC_ext
		251
		252	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		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
219		260
220	/* the next two functions merely cache the padlists */	261	/* the next two functions merely cache the padlists */
221	STATIC void	262	static void
222	get_padlist (CV *cv)	263	get_padlist (CV *cv)
223	{	264	{
224	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);	265	MAGIC *mg = CORO_MAGIC (cv);
		266	AV *av;
225		267
226	if (he && AvFILLp ((AV *)*he) >= 0)	268	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
227	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);	269	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
228	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
229	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	279	CvPADLIST (cv) = coro_clone_padlist (cv);
		280	#endif
		281	}
230	}	282	}
231		283
232	STATIC void	284	static void
233	put_padlist (CV *cv)	285	put_padlist (CV *cv)
234	{	286	{
235	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);	287	MAGIC *mg = CORO_MAGIC (cv);
		288	AV *av;
236		289
237	if (SvTYPE (*he) != SVt_PVAV)	290	if (!mg)
238	{
239	SvREFCNT_dec (*he);
240	*he = (SV *)newAV ();
241	}	291	{
242		292	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
243	av_push ((AV *)*he, (SV *)CvPADLIST (cv));	293	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
244	}	294	mg->mg_virtual = &vtbl_coro;
245		295	mg->mg_obj = (SV *)newAV ();
246	#ifdef MAY_FLUSH
247	STATIC void
248	flush_padlist_cache ()
249	{
250	HV *hv = padlist_cache;
251	padlist_cache = newHV ();
252
253	if (hv_iterinit (hv))
254	{	296	}
255	HE *he;
256	AV *padlist;
257		297
258	while (!!(he = hv_iternext (hv)))	298	av = (AV *)mg->mg_obj;
259	{
260	AV *av = (AV *)HeVAL(he);
261		299
262	/* casting is fun. */	300	if (AvFILLp (av) >= AvMAX (av))
263	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	301	av_extend (av, AvMAX (av) + 1);
264	free_padlist (padlist);
265	}
266	}
267		302
268	SvREFCNT_dec (hv);	303	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
269	}	304	}
270	#endif
271		305
272	#define SB do {	306	#define SB do {
273	#define SE } while (0)	307	#define SE } while (0)
274		308
275	#define LOAD(state) load_state(aTHX_ (state));
276	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
277
278	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	309	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
279		310
280	static void	311	static void
281	load_state(pTHX_ Coro__State c)	312	load_perl (Coro__State c)
282	{	313	{
283	PL_dowarn = c->dowarn;	314	#define VAR(name,type) PL_ ## name = c->name;
284	PL_in_eval = c->in_eval;	315	# include "state.h"
285		316	#undef VAR
286	PL_curstackinfo = c->curstackinfo;
287	PL_curstack = c->curstack;
288	PL_mainstack = c->mainstack;
289	PL_stack_sp = c->stack_sp;
290	PL_op = c->op;
291	PL_curpad = c->curpad;
292	PL_stack_base = c->stack_base;
293	PL_stack_max = c->stack_max;
294	PL_tmps_stack = c->tmps_stack;
295	PL_tmps_floor = c->tmps_floor;
296	PL_tmps_ix = c->tmps_ix;
297	PL_tmps_max = c->tmps_max;
298	PL_markstack = c->markstack;
299	PL_markstack_ptr = c->markstack_ptr;
300	PL_markstack_max = c->markstack_max;
301	PL_scopestack = c->scopestack;
302	PL_scopestack_ix = c->scopestack_ix;
303	PL_scopestack_max = c->scopestack_max;
304	PL_savestack = c->savestack;
305	PL_savestack_ix = c->savestack_ix;
306	PL_savestack_max = c->savestack_max;
307	PL_retstack = c->retstack;
308	PL_retstack_ix = c->retstack_ix;
309	PL_retstack_max = c->retstack_max;
310	PL_curcop = c->curcop;
311	PL_top_env = c->top_env;
312		317
313	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315	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	}
316		332
317	{	333	{
318	dSP;	334	dSP;
319	CV *cv;	335	CV *cv;
320		336
321	/* now do the ugly restore mess */	337	/* now do the ugly restore mess */
322	while ((cv = (CV *)POPs))	338	while ((cv = (CV *)POPs))
323	{	339	{
324	AV *padlist = (AV *)POPs;
325
326	if (padlist)
327	{
328	put_padlist (cv); /* mark this padlist as available */	340	put_padlist (cv); /* mark this padlist as available */
329	CvPADLIST(cv) = padlist;	341	CvDEPTH (cv) = PTR2IV (POPs);
330	#ifdef USE_THREADS	342	CvPADLIST (cv) = (AV *)POPs;
331	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332	#endif
333	}
334
335	++CvDEPTH(cv);
336	}	343	}
337		344
338	PUTBACK;	345	PUTBACK;
339	}	346	}
340	}	347	}
341		348
342	static void	349	static void
343	save_state(pTHX_ Coro__State c, int flags)	350	save_perl (Coro__State c)
344	{	351	{
345	{	352	{
346	dSP;	353	dSP;
347	I32 cxix = cxstack_ix;	354	I32 cxix = cxstack_ix;
348	PERL_CONTEXT *ccstk = cxstack;	355	PERL_CONTEXT *ccstk = cxstack;
…		…
351	/*	358	/*
352	* 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
353	* (and reinitialize) all cv's in the whole callchain :(	360	* (and reinitialize) all cv's in the whole callchain :(
354	*/	361	*/
355		362
		363	EXTEND (SP, 3 + 1);
356	PUSHs (Nullsv);	364	PUSHs (Nullsv);
357	/* this loop was inspired by pp_caller */	365	/* this loop was inspired by pp_caller */
358	for (;;)	366	for (;;)
359	{	367	{
360	while (cxix >= 0)	368	while (cxix >= 0)
361	{	369	{
362	PERL_CONTEXT *cx = &ccstk[cxix--];	370	PERL_CONTEXT *cx = &ccstk[cxix--];
363		371
364	if (CxTYPE(cx) == CXt_SUB)	372	if (CxTYPE (cx) == CXt_SUB)
365	{	373	{
366	CV *cv = cx->blk_sub.cv;	374	CV *cv = cx->blk_sub.cv;
		375
367	if (CvDEPTH(cv))	376	if (CvDEPTH (cv))
368	{	377	{
369	#ifdef USE_THREADS
370	/*XPUSHs ((SV *)CvOWNER(cv));*/
371	/*CvOWNER(cv) = 0;*/
372	/*error must unlock this cv etc.. etc...*/
373	#endif
374	EXTEND (SP, CvDEPTH(cv)*2);	378	EXTEND (SP, 3);
375
376	while (--CvDEPTH(cv))
377	{
378	/* this tells the restore code to increment CvDEPTH */
379	PUSHs (Nullsv);
380	PUSHs ((SV *)cv);
381	}
382
383	PUSHs ((SV *)CvPADLIST(cv));	379	PUSHs ((SV *)CvPADLIST (cv));
		380	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
384	PUSHs ((SV *)cv);	381	PUSHs ((SV *)cv);
385		382
		383	CvDEPTH (cv) = 0;
386	get_padlist (cv); /* this is a monster */	384	get_padlist (cv);
387	}	385	}
388	}
389	else if (CxTYPE(cx) == CXt_FORMAT)
390	{
391	/* I never used formats, so how should I know how these are implemented? */
392	/* my bold guess is as a simple, plain sub... */
393	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394	}	386	}
395	}	387	}
396		388
397	if (top_si->si_type == PERLSI_MAIN)	389	if (top_si->si_type == PERLSI_MAIN)
398	break;	390	break;
…		…
403	}	395	}
404		396
405	PUTBACK;	397	PUTBACK;
406	}	398	}
407		399
408	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;
409	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	401	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
410	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;
411		404
412	c->dowarn = PL_dowarn;	405	#define VAR(name,type)c->name = PL_ ## name;
413	c->in_eval = PL_in_eval;	406	# include "state.h"
414		407	#undef VAR
415	c->curstackinfo = PL_curstackinfo;
416	c->curstack = PL_curstack;
417	c->mainstack = PL_mainstack;
418	c->stack_sp = PL_stack_sp;
419	c->op = PL_op;
420	c->curpad = PL_curpad;
421	c->stack_base = PL_stack_base;
422	c->stack_max = PL_stack_max;
423	c->tmps_stack = PL_tmps_stack;
424	c->tmps_floor = PL_tmps_floor;
425	c->tmps_ix = PL_tmps_ix;
426	c->tmps_max = PL_tmps_max;
427	c->markstack = PL_markstack;
428	c->markstack_ptr = PL_markstack_ptr;
429	c->markstack_max = PL_markstack_max;
430	c->scopestack = PL_scopestack;
431	c->scopestack_ix = PL_scopestack_ix;
432	c->scopestack_max = PL_scopestack_max;
433	c->savestack = PL_savestack;
434	c->savestack_ix = PL_savestack_ix;
435	c->savestack_max = PL_savestack_max;
436	c->retstack = PL_retstack;
437	c->retstack_ix = PL_retstack_ix;
438	c->retstack_max = PL_retstack_max;
439	c->curcop = PL_curcop;
440	c->top_env = PL_top_env;
441	}	408	}
442		409
443	/*	410	/*
444	* allocate various perl stacks. This is an exact copy	411	* allocate various perl stacks. This is an exact copy
445	* of perl.c:init_stacks, except that it uses less memory	412	* of perl.c:init_stacks, except that it uses less memory
446	* on the assumption that coroutines do not usually need	413	* on the (sometimes correct) assumption that coroutines do
447	* a lot of stackspace.	414	* not usually need a lot of stackspace.
448	*/	415	*/
449	STATIC void	416	#if PREFER_PERL_FUNCTIONS
		417	# define coro_init_stacks init_stacks
		418	#else
		419	static void
450	coro_init_stacks (pTHX)	420	coro_init_stacks ()
451	{	421	{
452	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	422	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
453	PL_curstackinfo->si_type = PERLSI_MAIN;	423	PL_curstackinfo->si_type = PERLSI_MAIN;
454	PL_curstack = PL_curstackinfo->si_stack;	424	PL_curstack = PL_curstackinfo->si_stack;
455	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	425	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
456		426
457	PL_stack_base = AvARRAY(PL_curstack);	427	PL_stack_base = AvARRAY(PL_curstack);
458	PL_stack_sp = PL_stack_base;	428	PL_stack_sp = PL_stack_base;
459	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	429	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
460		430
461	New(50,PL_tmps_stack,96,SV*);	431	New(50,PL_tmps_stack,128,SV*);
462	PL_tmps_floor = -1;	432	PL_tmps_floor = -1;
463	PL_tmps_ix = -1;	433	PL_tmps_ix = -1;
464	PL_tmps_max = 96;	434	PL_tmps_max = 128;
465		435
466	New(54,PL_markstack,16,I32);	436	New(54,PL_markstack,32,I32);
467	PL_markstack_ptr = PL_markstack;	437	PL_markstack_ptr = PL_markstack;
468	PL_markstack_max = PL_markstack + 16;	438	PL_markstack_max = PL_markstack + 32;
469		439
		440	#ifdef SET_MARK_OFFSET
470	SET_MARK_OFFSET;	441	SET_MARK_OFFSET;
		442	#endif
471		443
472	New(54,PL_scopestack,16,I32);	444	New(54,PL_scopestack,32,I32);
473	PL_scopestack_ix = 0;	445	PL_scopestack_ix = 0;
474	PL_scopestack_max = 16;	446	PL_scopestack_max = 32;
475		447
476	New(54,PL_savestack,96,ANY);	448	New(54,PL_savestack,64,ANY);
477	PL_savestack_ix = 0;	449	PL_savestack_ix = 0;
478	PL_savestack_max = 96;	450	PL_savestack_max = 64;
479		451
		452	#if !PERL_VERSION_ATLEAST (5,9,0)
480	New(54,PL_retstack,8,OP*);	453	New(54,PL_retstack,16,OP*);
481	PL_retstack_ix = 0;	454	PL_retstack_ix = 0;
482	PL_retstack_max = 8;	455	PL_retstack_max = 16;
		456	#endif
483	}	457	}
		458	#endif
484		459
485	/*	460	/*
486	* destroy the stacks, the callchain etc...	461	* destroy the stacks, the callchain etc...
487	* still there is a memleak of 128 bytes...
488	*/	462	*/
489	STATIC void	463	static void
490	destroy_stacks(pTHX)	464	coro_destroy_stacks ()
491	{	465	{
492	/* is this ugly, I ask? */	466	if (!IN_DESTRUCT)
493	while (PL_scopestack_ix)	467	{
494	LEAVE;	468	/* restore all saved variables and stuff */
		469	LEAVE_SCOPE (0);
		470	assert (PL_tmps_floor == -1);
495		471
496	/* sure it is, but more important: is it correct?? :/ */	472	/* free all temporaries */
497	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
498	FREETMPS;	473	FREETMPS;
		474	assert (PL_tmps_ix == -1);
		475
		476	POPSTACK_TO (PL_mainstack);
		477	}
499		478
500	while (PL_curstackinfo->si_next)	479	while (PL_curstackinfo->si_next)
501	PL_curstackinfo = PL_curstackinfo->si_next;	480	PL_curstackinfo = PL_curstackinfo->si_next;
502		481
503	while (PL_curstackinfo)	482	while (PL_curstackinfo)
504	{	483	{
505	PERL_SI *p = PL_curstackinfo->si_prev;	484	PERL_SI *p = PL_curstackinfo->si_prev;
506		485
507	{	486	if (!IN_DESTRUCT)
508	dSP;
509	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
510	PUTBACK; /* possibly superfluous */
511	}
512
513	if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
514	dounwind(-1);
515
516	SvREFCNT_dec(PL_curstackinfo->si_stack);	487	SvREFCNT_dec (PL_curstackinfo->si_stack);
		488
517	Safefree(PL_curstackinfo->si_cxstack);	489	Safefree (PL_curstackinfo->si_cxstack);
518	Safefree(PL_curstackinfo);	490	Safefree (PL_curstackinfo);
519	PL_curstackinfo = p;	491	PL_curstackinfo = p;
520	}	492	}
521		493
522	Safefree(PL_tmps_stack);	494	Safefree (PL_tmps_stack);
523	Safefree(PL_markstack);	495	Safefree (PL_markstack);
524	Safefree(PL_scopestack);	496	Safefree (PL_scopestack);
525	Safefree(PL_savestack);	497	Safefree (PL_savestack);
		498	#if !PERL_VERSION_ATLEAST (5,9,0)
526	Safefree(PL_retstack);	499	Safefree (PL_retstack);
527	}
528
529	static void
530	allocate_stack (Coro__State ctx, int alloc)
531	{
532	coro_stack *stack;
533
534	New (0, stack, 1, coro_stack);
535
536	stack->refcnt = 1;
537	stack->usecnt = 1;
538	stack->gencnt = ctx->gencnt = 0;
539	if (alloc)
540	{
541	#ifdef HAVE_MMAP
542	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
543	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
544	if (stack->sptr == (void *)-1)
545	#endif	500	#endif
546	{
547	/*FIXME*//*D*//* reasonable stack size! */
548	stack->ssize = -4096 * sizeof (long);
549	New (0, stack->sptr, 4096, long);
550	}
551	}
552	else
553	stack->sptr = 0;
554
555	ctx->stack = stack;
556	}	501	}
557		502
558	static void	503	static void
559	deallocate_stack (Coro__State ctx)	504	setup_coro (struct coro *coro)
560	{
561	coro_stack *stack = ctx->stack;
562
563	ctx->stack = 0;
564
565	if (stack)
566	{
567	if (!--stack->refcnt)
568	{
569	#ifdef HAVE_MMAP
570	if (stack->ssize > 0 && stack->sptr)
571	munmap (stack->sptr, stack->ssize);
572	else
573	#else
574	Safefree (stack->sptr);
575	#endif
576	Safefree (stack);
577	}
578	else if (ctx->gencnt == stack->gencnt)
579	--stack->usecnt;
580	}
581	}
582
583	static void
584	setup_coro (void *arg)
585	{	505	{
586	/*	506	/*
587	* emulate part of the perl startup here.	507	* emulate part of the perl startup here.
588	*/	508	*/
		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	{
589	dSP;	555	dSP;
590	Coro__State ctx = (Coro__State)arg;	556	LOGOP myop;
591	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
592		557
593	coro_init_stacks (aTHX);	558	Zero (&myop, 1, LOGOP);
594	/*PL_curcop = 0;*/	559	myop.op_next = PL_op;
595	/*PL_in_eval = PL_in_eval;*/ /* inherit */	560	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
596	SvREFCNT_dec (GvAV (PL_defgv));
597	GvAV (PL_defgv) = ctx->args;
598		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);
599	SPAGAIN;	569	SPAGAIN;
600
601	if (ctx->stack)
602	{
603	ctx->cursp = 0;
604
605	PUSHMARK(SP);
606	PUTBACK;
607	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
608
609	if (SvTRUE (ERRSV))
610	croak (NULL);
611	else
612	croak ("FATAL: CCTXT coroutine returned!");
613	}
614	else
615	{
616	UNOP myop;
617
618	PL_op = (OP *)&myop;
619
620	Zero(&myop, 1, UNOP);
621	myop.op_next = Nullop;
622	myop.op_flags = OPf_WANT_VOID;
623
624	PUSHMARK(SP);
625	XPUSHs (sub_init);
626	/*
627	* the next line is slightly wrong, as PL_op->op_next
628	* is actually being executed so we skip the first op.
629	* that doesn't matter, though, since it is only
630	* pp_nextstate and we never return...
631	* ah yes, and I don't care anyways ;)
632	*/
633	PUTBACK;
634	PL_op = pp_entersub();
635	SPAGAIN;
636
637	ENTER; /* necessary e.g. for dounwind */
638	}
639	}	570	}
640		571
641	static void	572	static void
642	continue_coro (void *arg)	573	coro_run (void *arg)
643	{	574	{
		575	/* coro_run is the alternative tail of transfer(), so unlock here. */
		576	UNLOCK;
		577
644	/*	578	/*
645	* this is a _very_ stripped down perl interpreter ;)	579	* this is a _very_ stripped down perl interpreter ;)
646	*/	580	*/
647	Coro__State ctx = (Coro__State)arg;	581	PL_top_env = &PL_start_env;
648		582
649	/*FIXME*//* must set up top_env here */	583	/* inject call to cctx_init */
650	ctx->cursp = 0;	584	prepare_cctx ((coro_cctx *)arg);
651	PL_op = PL_op->op_next;
652	CALLRUNOPS(aTHX);
653		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);
654	abort ();	591	abort ();
655	}	592	}
656		593
657	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
658	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	706	transfer (struct coro *prev, struct coro *next)
659	{	707	{
660	dSTACKLEVEL;	708	dSTACKLEVEL;
661	static struct coro *xnext;
662		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	}
663	if (prev != next)	716	else if (prev != next)
664	{	717	{
665	xnext = next;	718	coro_cctx *prev__cctx;
666		719
667	if (next->mainstack)	720	if (prev->flags & CF_NEW)
668	{	721	{
669	SAVE (prev, flags);	722	/* create a new empty context */
670	LOAD (next);	723	Newz (0, prev->cctx, 1, coro_cctx);
671		724	prev->cctx->inuse = 1;
672	/* mark this state as in-use */	725	prev->flags &= ~CF_NEW;
673	next->mainstack = 0;	726	prev->flags |= CF_RUNNING;
674	next->tmps_ix = -2;
675
676	/* stacklevel changed? if yes, grab the stack for us! */
677	if (flags & TRANSFER_SAVE_CCTXT)
678	{
679	if (!prev->stack)
680	allocate_stack (prev, 0);
681	else if (prev->cursp != stacklevel
682	&& prev->stack->usecnt > 1)
683	{
684	prev->gencnt = ++prev->stack->gencnt;
685	prev->stack->usecnt = 1;
686	}
687
688	/* has our stack been invalidated? */
689	if (next->stack && next->stack->gencnt != next->gencnt)
690	{
691	deallocate_stack (next);
692	allocate_stack (next, 1);
693	coro_create (&(next->stack->cctx),
694	continue_coro, (void *)next,
695	next->stack->sptr, labs (next->stack->ssize));
696	}
697
698	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
699	/* don't add any code here */
700	}
701
702	}	727	}
703	else if (next->tmps_ix == -2)	728
704	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	}
705	else	752	else
706	{	753	{
707	SAVE (prev, -1); /* first get rid of the old state */	754	/* coroutine already started */
708		755	save_perl (prev);
709	if (flags & TRANSFER_SAVE_CCTXT)	756	load_perl (next);
710	{
711	if (!prev->stack)
712	allocate_stack (prev, 0);
713
714	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
715	{
716	setup_coro (next);
717
718	prev->stack->refcnt++;
719	prev->stack->usecnt++;
720	next->stack = prev->stack;
721	next->gencnt = prev->gencnt;
722	}
723	else
724	{
725	allocate_stack (next, 1);
726	coro_create (&(next->stack->cctx),
727	setup_coro, (void *)next,
728	next->stack->sptr, labs (next->stack->ssize));
729	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
730	/* don't add any code here */
731	}
732	}
733	else
734	setup_coro (next);
735	}	757	}
		758
		759	prev__cctx = prev->cctx;
		760
		761	/* possibly "free" the cctx */
		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
		787	free_coro_mortal ();
		788
		789	UNLOCK;
		790	}
		791	}
		792
		793	struct transfer_args
		794	{
		795	struct coro *prev, *next;
		796	};
		797
		798	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
		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)
736	}	807	{
		808	struct coro temp;
		809	Zero (&temp, 1, struct coro);
		810	temp.save = CORO_SAVE_ALL;
737		811
738	/*	812	if (coro->flags & CF_RUNNING)
739	* xnext is now either prev or next, depending on wether	813	croak ("FATAL: tried to destroy currently running coroutine");
740	* we switched the c stack or not. that's why i use a global	814
741	* variable, that should become thread-specific at one point.	815	save_perl (&temp);
742	*/	816	load_perl (coro);
743	xnext->cursp = stacklevel;	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);
744	}	828	}
		829
		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	};
745		861
746	static struct coro *	862	static struct coro *
747	sv_to_coro (SV *arg, const char *funcname, const char *varname)	863	SvSTATE (SV *coro)
748	{	864	{
749	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	865	HV *stash;
750	{	866	MAGIC *mg;
751	HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
752		867
753	if (!he)	868	if (SvROK (coro))
754	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);	869	coro = SvRV (coro);
755		870
756	arg = HeVAL(he);	871	stash = SvSTASH (coro);
		872	if (stash != coro_stash && stash != coro_state_stash)
757	}	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");
758		877	}
759	/* must also be changed inside Coro::Cont::yield */
760	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
761	return (struct coro *) SvIV((SV*)SvRV(arg));
762		878
763	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	879	mg = SvMAGIC (coro);
764	/*NORETURN*/	880	assert (mg->mg_type == PERL_MAGIC_ext);
		881	return (struct coro *)mg->mg_ptr;
765	}	882	}
766		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
		892	api_transfer (SV *prev_sv, SV *next_sv)
		893	{
		894	struct transfer_args ta;
		895
		896	prepare_transfer (&ta, prev_sv, next_sv);
		897	TRANSFER (ta);
		898	}
		899
767	static void	900	static int
768	api_transfer(pTHX_ SV *prev, SV *next, int flags)	901	api_save (SV *coro_sv, int new_save)
769	{	902	{
770	transfer(aTHX_	903	struct coro *coro = SvSTATE (coro_sv);
771	sv_to_coro (prev, "Coro::transfer", "prev"),	904	int old_save = coro->save;
772	sv_to_coro (next, "Coro::transfer", "next"),	905
773	flags);	906	if (new_save >= 0)
		907	coro->save = new_save;
		908
		909	return old_save;
774	}	910	}
775		911
776	/** Coro ********************************************************************/	912	/** Coro ********************************************************************/
777		913
778	#define PRIO_MAX 3	914	#define PRIO_MAX 3
…		…
781	#define PRIO_LOW -1	917	#define PRIO_LOW -1
782	#define PRIO_IDLE -3	918	#define PRIO_IDLE -3
783	#define PRIO_MIN -4	919	#define PRIO_MIN -4
784		920
785	/* for Coro.pm */	921	/* for Coro.pm */
786	static GV *coro_current, *coro_idle;	922	static SV *coro_current;
787	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	923	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
788	static int coro_nready;	924	static int coro_nready;
789		925
790	static void	926	static void
791	coro_enq (SV *sv)	927	coro_enq (SV *coro_sv)
792	{	928	{
793	if (SvROK (sv))	929	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
794	{
795	SV *hv = SvRV (sv);
796	if (SvTYPE (hv) == SVt_PVHV)
797	{
798	SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0);
799	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
800
801	prio = prio > PRIO_MAX ? PRIO_MAX
802	: prio < PRIO_MIN ? PRIO_MIN
803	: prio;
804
805	av_push (coro_ready [prio - PRIO_MIN], sv);
806	coro_nready++;	930	coro_nready++;
807
808	return;
809	}
810	}
811
812	croak ("Coro::ready tried to enqueue something that is not a coroutine");
813	}	931	}
814		932
815	static SV *	933	static SV *
816	coro_deq (int min_prio)	934	coro_deq (int min_prio)
817	{	935	{
…		…
820	min_prio -= PRIO_MIN;	938	min_prio -= PRIO_MIN;
821	if (min_prio < 0)	939	if (min_prio < 0)
822	min_prio = 0;	940	min_prio = 0;
823		941
824	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	942	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
825	if (av_len (coro_ready[prio]) >= 0)	943	if (AvFILLp (coro_ready [prio]) >= 0)
826	{	944	{
827	coro_nready--;	945	coro_nready--;
828	return av_shift (coro_ready[prio]);	946	return av_shift (coro_ready [prio]);
829	}	947	}
830		948
831	return 0;	949	return 0;
832	}	950	}
833		951
834	static void	952	static int
835	api_ready (SV *coro)	953	api_ready (SV *coro_sv)
836	{	954	{
		955	struct coro *coro;
		956
		957	if (SvROK (coro_sv))
		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;
		966
		967	LOCK;
837	coro_enq (SvREFCNT_inc (coro));	968	coro_enq (SvREFCNT_inc (coro_sv));
838	}	969	UNLOCK;
839		970
		971	return 1;
		972	}
		973
840	static void	974	static int
841	api_schedule (int cede)	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)
842	{	982	{
843	SV *prev, *next;	983	SV *prev, *next;
844		984
845	prev = GvSV (coro_current);	985	for (;;)
846		986	{
847	if (cede)	987	LOCK;
848	coro_enq (SvREFCNT_inc (prev));
849
850	next = coro_deq (PRIO_MIN);	988	next = coro_deq (PRIO_MIN);
		989	UNLOCK;
851		990
852	if (!next)	991	if (next)
853	next = SvREFCNT_inc (GvSV (coro_idle));	992	break;
854		993
855	GvSV (coro_current) = SvREFCNT_inc (next);	994	{
856	transfer (aTHX_	995	dSP;
857	sv_to_coro (prev, "Coro::schedule", "current coroutine"),	996
858	sv_to_coro (next, "Coro::schedule", "next coroutine"),	997	ENTER;
859	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);	998	SAVETMPS;
860	SvREFCNT_dec (next);	999
861	SvREFCNT_dec (prev);	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;
		1047	}
		1048
		1049	static void
		1050	api_schedule (void)
		1051	{
		1052	struct transfer_args ta;
		1053
		1054	prepare_schedule (&ta);
		1055	TRANSFER (ta);
		1056	}
		1057
		1058	static int
		1059	api_cede (void)
		1060	{
		1061	struct transfer_args ta;
		1062
		1063	prepare_cede (&ta);
		1064
		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;
862	}	1086	}
863		1087
864	MODULE = Coro::State PACKAGE = Coro::State	1088	MODULE = Coro::State PACKAGE = Coro::State
865		1089
866	PROTOTYPES: ENABLE	1090	PROTOTYPES: DISABLE
867		1091
868	BOOT:	1092	BOOT:
869	{ /* {} necessary for stoopid perl-5.6.x */	1093	{
870	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1094	#ifdef USE_ITHREADS
871	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1095	MUTEX_INIT (&coro_mutex);
		1096	#endif
		1097	BOOT_PAGESIZE;
		1098
872	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1099	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
873		1100
874	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1101	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
875	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1102	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
876	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));
877	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1105	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
878
879	if (!padlist_cache)
880	padlist_cache = newHV ();
881		1106
882	main_mainstack = PL_mainstack;	1107	main_mainstack = PL_mainstack;
883		1108
884	coroapi.ver = CORO_API_VERSION;	1109	coroapi.ver = CORO_API_VERSION;
885	coroapi.transfer = api_transfer;	1110	coroapi.transfer = api_transfer;
886	}
887		1111
888	Coro::State	1112	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
889	_newprocess(args)	1113	}
890	SV * args	1114
891	PROTOTYPE: $	1115	SV *
		1116	new (char *klass, ...)
892	CODE:	1117	CODE:
893	Coro__State coro;	1118	{
		1119	struct coro *coro;
		1120	HV *hv;
		1121	int i;
894		1122
895	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
896	croak ("Coro::State::_newprocess expects an arrayref");
897
898	New (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;
899		1127
900	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1128	hv = newHV ();
901	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;
902	coro->stack = 0;	1130	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
903		1131
904	RETVAL = coro;	1132	for (i = 1; i < items; i++)
		1133	av_push (coro->args, newSVsv (ST (i)));
		1134	}
905	OUTPUT:	1135	OUTPUT:
906	RETVAL	1136	RETVAL
907		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
908	void	1145	void
909	transfer(prev, next, flags)	1146	_set_stacklevel (...)
910	Coro::State_or_hashref prev	1147	ALIAS:
911	Coro::State_or_hashref next	1148	Coro::State::transfer = 1
912	int flags	1149	Coro::schedule = 2
913	PROTOTYPE: @	1150	Coro::cede = 3
		1151	Coro::cede_notself = 4
914	CODE:	1152	CODE:
915	PUTBACK;	1153	{
916	transfer (aTHX_ prev, next, flags);	1154	struct transfer_args ta;
917	SPAGAIN;	1155
		1156	switch (ix)
		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	}
918		1188
919	void	1189	void
920	DESTROY(coro)	1190	_clone_state_from (SV *dst, SV *src)
921	Coro::State coro	1191	CODE:
922	CODE:	1192	{
		1193	struct coro *coro_src = SvSTATE (src);
923		1194
924	if (coro->mainstack && coro->mainstack != main_mainstack)	1195	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
925	{
926	struct coro temp;
927		1196
928	PUTBACK;	1197	++coro_src->refcnt;
929	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;
930	LOAD(aTHX_ coro);	1199	}
931	SPAGAIN;
932
933	destroy_stacks (aTHX);
934
935	LOAD((&temp)); /* this will get rid of defsv etc.. */
936	SPAGAIN;
937
938	coro->mainstack = 0;
939	}
940
941	deallocate_stack (coro);
942
943	Safefree (coro);
944		1200
945	void	1201	void
946	flush()
947	CODE:
948	#ifdef MAY_FLUSH
949	flush_padlist_cache ();
950	#endif
951
952	void
953	_exit(code)	1202	_exit (code)
954	int code	1203	int code
955	PROTOTYPE: $	1204	PROTOTYPE: $
956	CODE:	1205	CODE:
957	#if defined(__GLIBC__) || _POSIX_C_SOURCE
958	_exit (code);	1206	_exit (code);
959	#else
960	signal (SIGTERM, SIG_DFL);
961	raise (SIGTERM);
962	exit (code);
963	#endif
964		1207
965	MODULE = Coro::State PACKAGE = Coro::Cont	1208	int
		1209	cctx_count ()
		1210	CODE:
		1211	RETVAL = cctx_count;
		1212	OUTPUT:
		1213	RETVAL
966		1214
967	# this is slightly dirty (should expose a c-level api)	1215	int
968		1216	cctx_idle ()
969	void	1217	CODE:
970	yield(...)	1218	RETVAL = cctx_idle;
971	PROTOTYPE: @	1219	OUTPUT:
972	CODE:	1220	RETVAL
973	static SV *returnstk;
974	SV *sv;
975	AV *defav = GvAV (PL_defgv);
976	struct coro *prev, *next;
977
978	if (!returnstk)
979	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
980
981	/* set up @_ -- ugly */
982	av_clear (defav);
983	av_fill (defav, items - 1);
984	while (items--)
985	av_store (defav, items, SvREFCNT_inc (ST(items)));
986
987	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
988	sv = av_pop ((AV *)SvRV (returnstk));
989	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
990	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
991	SvREFCNT_dec (sv);
992
993	transfer(aTHX_ prev, next, 0);
994		1221
995	MODULE = Coro::State PACKAGE = Coro	1222	MODULE = Coro::State PACKAGE = Coro
996		1223
997	# this is slightly dirty (should expose a c-level api)
998
999	BOOT:	1224	BOOT:
1000	{	1225	{
1001	int i;	1226	int i;
		1227
1002	HV *stash = gv_stashpv ("Coro", TRUE);	1228	coro_stash = gv_stashpv ("Coro", TRUE);
1003		1229
1004	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1230	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1005	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1231	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1006	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1232	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1007	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1233	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1008	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1234	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1009	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1235	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1010		1236
1011	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1237	coro_current = get_sv ("Coro::current", FALSE);
1012	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1238	SvREADONLY_on (coro_current);
1013		1239
1014	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1240	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1015	coro_ready[i] = newAV ();	1241	coro_ready[i] = newAV ();
1016		1242
1017	{	1243	{
1018	SV *sv = perl_get_sv("Coro::API", 1);	1244	SV *sv = perl_get_sv("Coro::API", 1);
1019		1245
1020	coroapi.schedule = api_schedule;	1246	coroapi.schedule = api_schedule;
		1247	coroapi.save = api_save;
		1248	coroapi.cede = api_cede;
		1249	coroapi.cede_notself = api_cede_notself;
1021	coroapi.ready = api_ready;	1250	coroapi.ready = api_ready;
		1251	coroapi.is_ready = api_is_ready;
1022	coroapi.nready = &coro_nready;	1252	coroapi.nready = &coro_nready;
1023	coroapi.current = coro_current;	1253	coroapi.current = coro_current;
1024		1254
1025	GCoroAPI = &coroapi;	1255	GCoroAPI = &coroapi;
1026	sv_setiv(sv, (IV)&coroapi);	1256	sv_setiv (sv, (IV)&coroapi);
1027	SvREADONLY_on(sv);	1257	SvREADONLY_on (sv);
1028	}	1258	}
1029	}	1259	}
1030		1260
1031	void	1261	void
1032	ready(self)	1262	_set_current (SV *current)
1033	SV * self	1263	PROTOTYPE: $
1034	CODE:	1264	CODE:
1035	api_ready (self);	1265	SvREFCNT_dec (SvRV (coro_current));
		1266	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1036		1267
1037	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
1038	nready(...)	1307	nready (...)
1039	PROTOTYPE:	1308	PROTOTYPE:
1040	CODE:	1309	CODE:
1041	RETVAL = coro_nready;	1310	RETVAL = coro_nready;
1042	OUTPUT:	1311	OUTPUT:
1043	RETVAL	1312	RETVAL
1044		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
1045	void	1335	void
1046	schedule(...)	1336	_set_state (char *data_)
1047	PROTOTYPE:	1337	PROTOTYPE: $
1048	ALIAS:
1049	cede = 1
1050	CODE:	1338	CODE:
1051	api_schedule (ix);	1339	{
		1340	struct io_state *data = (void *)data_;
1052		1341
		1342	errno = data->errorno;
		1343	PL_laststype = data->laststype;
		1344	PL_laststatval = data->laststatval;
		1345	PL_statcache = data->statcache;
		1346	}
		1347

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines