[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.33 by root, Sun Aug 26 21:44:20 2001 UTC vs.
Revision 1.142 by root, Tue Feb 13 19:21:29 2007 UTC

…		…
		1	#include "libcoro/coro.c"
		2
1	#include "EXTERN.h"	3	#include "EXTERN.h"
2	#include "perl.h"	4	#include "perl.h"
3	#include "XSUB.h"	5	#include "XSUB.h"
4		6
5	#include "libcoro/coro.c"	7	#include "patchlevel.h"
6		8
7	#include <signal.h>	9	#include <stdio.h>
		10	#include <errno.h>
		11	#include <assert.h>
8		12
9	#ifdef HAVE_MMAP	13	#ifdef HAVE_MMAP
10	# include <unistd.h>	14	# include <unistd.h>
11	# include <sys/mman.h>	15	# include <sys/mman.h>
12	# ifndef MAP_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	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		39	#else
		40	# define REGISTER_STACK(cctx,start,end)
		41	#endif
22		42
23	#define SUB_INIT "Coro::State::initialize"	43	/* the maximum number of idle cctx that will be pooled */
24	#define UCORO_STATE "_coro_state"	44	#define MAX_IDLE_CCTX 8
		45
		46	#define PERL_VERSION_ATLEAST(a,b,c) \
		47	(PERL_REVISION > (a) \
		48	\|\| (PERL_REVISION == (a) \
		49	&& (PERL_VERSION > (b) \
		50	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		51
		52	#if !PERL_VERSION_ATLEAST (5,6,0)
		53	# ifndef PL_ppaddr
		54	# define PL_ppaddr ppaddr
		55	# endif
		56	# ifndef call_sv
		57	# define call_sv perl_call_sv
		58	# endif
		59	# ifndef get_sv
		60	# define get_sv perl_get_sv
		61	# endif
		62	# ifndef get_cv
		63	# define get_cv perl_get_cv
		64	# endif
		65	# ifndef IS_PADGV
		66	# define IS_PADGV(v) 0
		67	# endif
		68	# ifndef IS_PADCONST
		69	# define IS_PADCONST(v) 0
		70	# endif
		71	#endif
		72
		73	/* 5.8.7 */
		74	#ifndef SvRV_set
		75	# define SvRV_set(s,v) SvRV(s) = (v)
		76	#endif
		77
		78	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		79	# undef STACKGUARD
		80	#endif
		81
		82	#ifndef STACKGUARD
		83	# define STACKGUARD 0
		84	#endif
		85
		86	/* prefer perl internal functions over our own? */
		87	#ifndef PREFER_PERL_FUNCTIONS
		88	# define PREFER_PERL_FUNCTIONS 0
		89	#endif
25		90
26	/* The next macro should declare a variable stacklevel that contains and approximation	91	/* The next macro should declare a variable stacklevel that contains and approximation
27	* to the current C stack pointer. Its property is that it changes with each call	92	* to the current C stack pointer. Its property is that it changes with each call
28	* and should be unique. */	93	* and should be unique. */
		94	#define dSTACKLEVEL int stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	95	#define STACKLEVEL ((void *)&stacklevel)
30		96
31	#define labs(l) ((l) >= 0 ? (l) : -(l))	97	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		98
		99	#if __GNUC__ >= 3
		100	# define attribute(x) __attribute__(x)
		101	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		102	#else
		103	# define attribute(x)
		104	# define BARRIER
		105	#endif
		106
		107	#define NOINLINE attribute ((noinline))
32		108
33	#include "CoroAPI.h"	109	#include "CoroAPI.h"
34		110
		111	#ifdef USE_ITHREADS
		112	static perl_mutex coro_mutex;
		113	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		114	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		115	#else
		116	# define LOCK (void)0
		117	# define UNLOCK (void)0
		118	#endif
		119
		120	/* helper storage struct for Coro::AIO */
		121	struct io_state
		122	{
		123	int errorno;
		124	I32 laststype;
		125	int laststatval;
		126	Stat_t statcache;
		127	};
		128
35	static struct CoroAPI coroapi;	129	static struct CoroAPI coroapi;
		130	static AV main_mainstack; / used to differentiate between $main and others */
		131	static HV coro_state_stash, coro_stash;
		132	static SV coro_mortal; / will be freed after next transfer */
36		133
37	/* this is actually not only the c stack but also c registers etc... */	134	static struct coro_cctx *cctx_first;
		135	static int cctx_count, cctx_idle;
		136
		137	/* this is a structure representing a c-level coroutine */
38	typedef struct {	138	typedef struct coro_cctx {
39	int refcnt; /* pointer reference counter */	139	struct coro_cctx *next;
40	int usecnt; /* shared by how many coroutines */
41	int gencnt; /* generation counter */
42		140
		141	/* the stack */
		142	void *sptr;
		143	ssize_t ssize; /* positive == mmap, otherwise malloc */
		144
		145	/* cpu state */
		146	void idle_sp; / sp of top-level transfer/schedule/cede call */
		147	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		148	JMPENV *top_env;
43	coro_context cctx;	149	coro_context cctx;
44		150
45	void *sptr;	151	int inuse;
46	long ssize; /* positive == mmap, otherwise malloc */
47	} coro_stack;
48		152
		153	#if USE_VALGRIND
		154	int valgrind_id;
		155	#endif
		156	} coro_cctx;
		157
		158	enum {
		159	CF_RUNNING = 0x0001, /* coroutine is running */
		160	CF_READY = 0x0002, /* coroutine is ready */
		161	CF_NEW = 0x0004, /* has never been switched to */
		162	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		163	};
		164
		165	/* this is a structure representing a perl-level coroutine */
49	struct coro {	166	struct coro {
50	/* the optional C context */	167	/* the c coroutine allocated to this perl coroutine, if any */
51	coro_stack *stack;	168	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		169
92	/* data associated with this coroutine (initial args) */	170	/* data associated with this coroutine (initial args) */
93	AV *args;	171	AV *args;
		172	int refcnt;
		173	int save; /* CORO_SAVE flags */
		174	int flags; /* CF_ flags */
		175
		176	/* optionally saved, might be zero */
		177	AV defav; / @_ */
		178	SV defsv; / $_ */
		179	SV errsv; / $@ */
		180	SV irssv; / $/ */
		181	SV irssv_sv; / real $/ cache */
		182
		183	#define VAR(name,type) type name;
		184	# include "state.h"
		185	#undef VAR
		186
		187	/* coro process data */
		188	int prio;
94	};	189	};
95		190
96	typedef struct coro *Coro__State;	191	typedef struct coro *Coro__State;
97	typedef struct coro *Coro__State_or_hashref;	192	typedef struct coro *Coro__State_or_hashref;
98		193
99	static AV main_mainstack; / used to differentiate between $main and others */	194	/ Coro ******************************************************************/
100	static HV *coro_state_stash;
101	static SV *ucoro_state_sv;
102	static U32 ucoro_state_hash;
103	static HV *padlist_cache;
104		195
105	/* mostly copied from op.c:cv_clone2 */	196	#define PRIO_MAX 3
106	STATIC AV *	197	#define PRIO_HIGH 1
107	clone_padlist (AV *protopadlist)	198	#define PRIO_NORMAL 0
		199	#define PRIO_LOW -1
		200	#define PRIO_IDLE -3
		201	#define PRIO_MIN -4
		202
		203	/* for Coro.pm */
		204	static SV *coro_current;
		205	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		206	static int coro_nready;
		207
		208	/ lowlevel stuff ********************************************************/
		209
		210	static AV *
		211	coro_clone_padlist (CV *cv)
108	{	212	{
109	AV *av;	213	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;	214	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		215
128	newpadlist = newAV ();	216	newpadlist = newAV ();
129	AvREAL_off (newpadlist);	217	AvREAL_off (newpadlist);
130	av_store (newpadlist, 0, (SV *) newpad_name);	218	#if PERL_VERSION_ATLEAST (5,9,0)
		219	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		220	#else
		221	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		222	#endif
		223	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		224	--AvFILLp (padlist);
		225
		226	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
131	av_store (newpadlist, 1, (SV *) newpad);	227	av_store (newpadlist, 1, (SV *)newpad);
132		228
133	av = newAV (); /* will be @_ */	229	return newpadlist;
134	av_extend (av, 0);	230	}
135	av_store (newpad, 0, (SV *) av);
136	AvFLAGS (av) = AVf_REIFY;
137		231
138	for (ix = fpad; ix > 0; ix--)	232	static void
		233	free_padlist (AV *padlist)
		234	{
		235	/* may be during global destruction */
		236	if (SvREFCNT (padlist))
139	{	237	{
140	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	238	I32 i = AvFILLp (padlist);
141	if (namesv && namesv != &PL_sv_undef)	239	while (i >= 0)
142	{	240	{
143	char name = SvPVX (namesv); / XXX */	241	SV **svp = av_fetch (padlist, i--, FALSE);
144	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')	242	if (svp)
145	{ /* lexical from outside? */
146	npad[ix] = SvREFCNT_inc (ppad[ix]);
147	}	243	{
148	else
149	{ /* our own lexical */
150	SV *sv;	244	SV *sv;
151	if (*name == '&')	245	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
152	sv = SvREFCNT_inc (ppad[ix]);	246	SvREFCNT_dec (sv);
153	else if (*name == '@')	247
154	sv = (SV *) newAV ();	248	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	}	249	}
163	}	250	}
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		251
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);	252	SvREFCNT_dec ((SV*)padlist);
216	}	253	}
217	}	254	}
218	#endif	255
		256	static int
		257	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		258	{
		259	AV *padlist;
		260	AV av = (AV )mg->mg_obj;
		261
		262	/* casting is fun. */
		263	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		264	free_padlist (padlist);
		265
		266	SvREFCNT_dec (av);
		267
		268	return 0;
		269	}
		270
		271	#define PERL_MAGIC_coro PERL_MAGIC_ext
		272
		273	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		274
		275	#define CORO_MAGIC(cv) \
		276	SvMAGIC (cv) \
		277	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		278	? SvMAGIC (cv) \
		279	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		280	: 0
219		281
220	/* the next two functions merely cache the padlists */	282	/* the next two functions merely cache the padlists */
221	STATIC void	283	static void
222	get_padlist (CV *cv)	284	get_padlist (CV *cv)
223	{	285	{
224	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);	286	MAGIC *mg = CORO_MAGIC (cv);
		287	AV *av;
225		288
226	if (he && AvFILLp ((AV )he) >= 0)	289	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
227	CvPADLIST (cv) = (AV )av_pop ((AV )*he);	290	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
228	else	291	else
		292	{
		293	#if PREFER_PERL_FUNCTIONS
		294	/* this is probably cleaner, but also slower? */
		295	CV *cp = Perl_cv_clone (cv);
		296	CvPADLIST (cv) = CvPADLIST (cp);
		297	CvPADLIST (cp) = 0;
		298	SvREFCNT_dec (cp);
		299	#else
229	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	300	CvPADLIST (cv) = coro_clone_padlist (cv);
		301	#endif
		302	}
230	}	303	}
231		304
232	STATIC void	305	static void
233	put_padlist (CV *cv)	306	put_padlist (CV *cv)
234	{	307	{
235	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);	308	MAGIC *mg = CORO_MAGIC (cv);
		309	AV *av;
236		310
237	if (SvTYPE (*he) != SVt_PVAV)	311	if (!mg)
238	{
239	SvREFCNT_dec (*he);
240	he = (SV )newAV ();
241	}	312	{
242		313	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
243	av_push ((AV )he, (SV *)CvPADLIST (cv));	314	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
244	}	315	mg->mg_virtual = &vtbl_coro;
245		316	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	{	317	}
255	HE *he;
256	AV *padlist;
257		318
258	while (!!(he = hv_iternext (hv)))	319	av = (AV *)mg->mg_obj;
259	{
260	AV av = (AV )HeVAL(he);
261		320
262	/* casting is fun. */	321	if (AvFILLp (av) >= AvMAX (av))
263	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	322	av_extend (av, AvMAX (av) + 1);
264	free_padlist (padlist);
265	}
266	}
267		323
268	SvREFCNT_dec (hv);	324	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
269	}	325	}
270	#endif	326
		327	/ load & save, init *****************************************************/
271		328
272	#define SB do {	329	#define SB do {
273	#define SE } while (0)	330	#define SE } while (0)
274		331
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	332	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
279		333
280	static void	334	static void
281	load_state(pTHX_ Coro__State c)	335	load_perl (Coro__State c)
282	{	336	{
283	PL_dowarn = c->dowarn;	337	#define VAR(name,type) PL_ ## name = c->name;
284	PL_in_eval = c->in_eval;	338	# include "state.h"
285		339	#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		340
313	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	341	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	342	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	343	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		344	if (c->irssv)
		345	{
		346	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
		347	SvREFCNT_dec (c->irssv);
		348	else
		349	{
		350	REPLACE_SV (PL_rs, c->irssv);
		351	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		352	sv_setsv (c->irssv_sv, PL_rs);
		353	}
		354	}
316		355
317	{	356	{
318	dSP;	357	dSP;
319	CV *cv;	358	CV *cv;
320		359
321	/* now do the ugly restore mess */	360	/* now do the ugly restore mess */
322	while ((cv = (CV *)POPs))	361	while ((cv = (CV *)POPs))
323	{	362	{
324	AV padlist = (AV )POPs;
325
326	if (padlist)
327	{
328	put_padlist (cv); /* mark this padlist as available */	363	put_padlist (cv); /* mark this padlist as available */
329	CvPADLIST(cv) = padlist;	364	CvDEPTH (cv) = PTR2IV (POPs);
330	#ifdef USE_THREADS	365	CvPADLIST (cv) = (AV *)POPs;
331	/CvOWNER(cv) = (struct perl_thread )POPs;*/
332	#endif
333	}
334
335	++CvDEPTH(cv);
336	}	366	}
337		367
338	PUTBACK;	368	PUTBACK;
339	}	369	}
		370	assert (!PL_comppad \|\| AvARRAY (PL_comppad));//D
340	}	371	}
341		372
342	static void	373	static void
343	save_state(pTHX_ Coro__State c, int flags)	374	save_perl (Coro__State c)
344	{	375	{
		376	assert (!PL_comppad \|\| AvARRAY (PL_comppad));//D
345	{	377	{
346	dSP;	378	dSP;
347	I32 cxix = cxstack_ix;	379	I32 cxix = cxstack_ix;
348	PERL_CONTEXT *ccstk = cxstack;	380	PERL_CONTEXT *ccstk = cxstack;
349	PERL_SI *top_si = PL_curstackinfo;	381	PERL_SI *top_si = PL_curstackinfo;
351	/*	383	/*
352	* the worst thing you can imagine happens first - we have to save	384	* the worst thing you can imagine happens first - we have to save
353	* (and reinitialize) all cv's in the whole callchain :(	385	* (and reinitialize) all cv's in the whole callchain :(
354	*/	386	*/
355		387
		388	EXTEND (SP, 3 + 1);
356	PUSHs (Nullsv);	389	PUSHs (Nullsv);
357	/* this loop was inspired by pp_caller */	390	/* this loop was inspired by pp_caller */
358	for (;;)	391	for (;;)
359	{	392	{
360	while (cxix >= 0)	393	while (cxix >= 0)
361	{	394	{
362	PERL_CONTEXT *cx = &ccstk[cxix--];	395	PERL_CONTEXT *cx = &ccstk[cxix--];
363		396
364	if (CxTYPE(cx) == CXt_SUB)	397	if (CxTYPE (cx) == CXt_SUB)
365	{	398	{
366	CV *cv = cx->blk_sub.cv;	399	CV *cv = cx->blk_sub.cv;
		400
367	if (CvDEPTH(cv))	401	if (CvDEPTH (cv))
368	{	402	{
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);	403	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));	404	PUSHs ((SV *)CvPADLIST (cv));
		405	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
384	PUSHs ((SV *)cv);	406	PUSHs ((SV *)cv);
385		407
		408	CvDEPTH (cv) = 0;
386	get_padlist (cv); /* this is a monster */	409	get_padlist (cv);
387	}	410	}
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	}	411	}
395	}	412	}
396		413
397	if (top_si->si_type == PERLSI_MAIN)	414	if (top_si->si_type == PERLSI_MAIN)
398	break;	415	break;
…		…
403	}	420	}
404		421
405	PUTBACK;	422	PUTBACK;
406	}	423	}
407		424
408	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	425	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;	426	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
410	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	427	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		428	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
411		429
412	c->dowarn = PL_dowarn;	430	#define VAR(name,type)c->name = PL_ ## name;
413	c->in_eval = PL_in_eval;	431	# include "state.h"
414		432	#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	}	433	}
442		434
443	/*	435	/*
444	* allocate various perl stacks. This is an exact copy	436	* allocate various perl stacks. This is an exact copy
445	* of perl.c:init_stacks, except that it uses less memory	437	* of perl.c:init_stacks, except that it uses less memory
446	* on the assumption that coroutines do not usually need	438	* on the (sometimes correct) assumption that coroutines do
447	* a lot of stackspace.	439	* not usually need a lot of stackspace.
448	*/	440	*/
449	STATIC void	441	#if PREFER_PERL_FUNCTIONS
		442	# define coro_init_stacks init_stacks
		443	#else
		444	static void
450	coro_init_stacks (pTHX)	445	coro_init_stacks ()
451	{	446	{
452	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	447	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
453	PL_curstackinfo->si_type = PERLSI_MAIN;	448	PL_curstackinfo->si_type = PERLSI_MAIN;
454	PL_curstack = PL_curstackinfo->si_stack;	449	PL_curstack = PL_curstackinfo->si_stack;
455	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
456		451
457	PL_stack_base = AvARRAY(PL_curstack);	452	PL_stack_base = AvARRAY(PL_curstack);
458	PL_stack_sp = PL_stack_base;	453	PL_stack_sp = PL_stack_base;
459	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
460		455
461	New(50,PL_tmps_stack,96,SV*);	456	New(50,PL_tmps_stack,128,SV*);
462	PL_tmps_floor = -1;	457	PL_tmps_floor = -1;
463	PL_tmps_ix = -1;	458	PL_tmps_ix = -1;
464	PL_tmps_max = 96;	459	PL_tmps_max = 128;
465		460
466	New(54,PL_markstack,16,I32);	461	New(54,PL_markstack,32,I32);
467	PL_markstack_ptr = PL_markstack;	462	PL_markstack_ptr = PL_markstack;
468	PL_markstack_max = PL_markstack + 16;	463	PL_markstack_max = PL_markstack + 32;
469		464
		465	#ifdef SET_MARK_OFFSET
470	SET_MARK_OFFSET;	466	SET_MARK_OFFSET;
		467	#endif
471		468
472	New(54,PL_scopestack,16,I32);	469	New(54,PL_scopestack,32,I32);
473	PL_scopestack_ix = 0;	470	PL_scopestack_ix = 0;
474	PL_scopestack_max = 16;	471	PL_scopestack_max = 32;
475		472
476	New(54,PL_savestack,96,ANY);	473	New(54,PL_savestack,64,ANY);
477	PL_savestack_ix = 0;	474	PL_savestack_ix = 0;
478	PL_savestack_max = 96;	475	PL_savestack_max = 64;
479		476
		477	#if !PERL_VERSION_ATLEAST (5,9,0)
480	New(54,PL_retstack,8,OP*);	478	New(54,PL_retstack,16,OP*);
481	PL_retstack_ix = 0;	479	PL_retstack_ix = 0;
482	PL_retstack_max = 8;	480	PL_retstack_max = 16;
		481	#endif
483	}	482	}
		483	#endif
484		484
485	/*	485	/*
486	* destroy the stacks, the callchain etc...	486	* destroy the stacks, the callchain etc...
487	* still there is a memleak of 128 bytes...
488	*/	487	*/
489	STATIC void	488	static void
490	destroy_stacks(pTHX)	489	coro_destroy_stacks ()
491	{	490	{
492	int destruct = PL_main_cv != Nullcv;	491	if (!IN_DESTRUCT)
493
494	if (destruct)
495	{	492	{
496	/* is this ugly, I ask? */	493	/* restore all saved variables and stuff */
497	while (PL_scopestack_ix)	494	LEAVE_SCOPE (0);
498	LEAVE;	495	assert (PL_tmps_floor == -1);
499		496
500	/* sure it is, but more important: is it correct?? :/ */	497	/* free all temporaries */
501	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
502	FREETMPS;	498	FREETMPS;
		499	assert (PL_tmps_ix == -1);
		500
		501	/* unwind all extra stacks */
		502	POPSTACK_TO (PL_mainstack);
		503
		504	/* unwind main stack */
		505	dounwind (-1);
503	}	506	}
504		507
505	while (PL_curstackinfo->si_next)	508	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	509	PL_curstackinfo = PL_curstackinfo->si_next;
507		510
508	while (PL_curstackinfo)	511	while (PL_curstackinfo)
509	{	512	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	513	PERL_SI *p = PL_curstackinfo->si_prev;
511		514
512	{	515	if (!IN_DESTRUCT)
513	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */
516	}
517
518	if (destruct)
519	{
520	dounwind(-1);
521	SvREFCNT_dec(PL_curstackinfo->si_stack);	516	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}
523		517
524	Safefree(PL_curstackinfo->si_cxstack);	518	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree(PL_curstackinfo);	519	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	520	PL_curstackinfo = p;
527	}	521	}
528		522
529	Safefree(PL_tmps_stack);	523	Safefree (PL_tmps_stack);
530	Safefree(PL_markstack);	524	Safefree (PL_markstack);
531	Safefree(PL_scopestack);	525	Safefree (PL_scopestack);
532	Safefree(PL_savestack);	526	Safefree (PL_savestack);
		527	#if !PERL_VERSION_ATLEAST (5,9,0)
533	Safefree(PL_retstack);	528	Safefree (PL_retstack);
534	}
535
536	static void
537	allocate_stack (Coro__State ctx, int alloc)
538	{
539	coro_stack *stack;
540
541	New (0, stack, 1, coro_stack);
542
543	stack->refcnt = 1;
544	stack->usecnt = 1;
545	stack->gencnt = ctx->gencnt = 0;
546	if (alloc)
547	{
548	#ifdef HAVE_MMAP
549	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);
551	if (stack->sptr == (void *)-1)
552	#endif	529	#endif
553	{
554	/FIXME//D//* reasonable stack size! */
555	stack->ssize = -4096 * sizeof (long);
556	New (0, stack->sptr, 4096, long);
557	}
558	}
559	else
560	stack->sptr = 0;
561
562	ctx->stack = stack;
563	}	530	}
564		531
565	static void	532	/ coroutine stack handling **********************************************/
566	deallocate_stack (Coro__State ctx)
567	{
568	coro_stack *stack = ctx->stack;
569		533
570	ctx->stack = 0;
571
572	if (stack)
573	{
574	if (!--stack->refcnt)
575	{
576	#ifdef HAVE_MMAP
577	if (stack->ssize > 0 && stack->sptr)
578	munmap (stack->sptr, stack->ssize);
579	else
580	#else
581	Safefree (stack->sptr);
582	#endif
583	Safefree (stack);
584	}
585	else if (ctx->gencnt == stack->gencnt)
586	--stack->usecnt;
587	}
588	}
589
590	static void	534	static void
591	setup_coro (void *arg)	535	setup_coro (struct coro *coro)
592	{	536	{
593	/*	537	/*
594	* emulate part of the perl startup here.	538	* emulate part of the perl startup here.
595	*/	539	*/
		540
		541	coro_init_stacks ();
		542
		543	PL_curcop = &PL_compiling;
		544	PL_in_eval = EVAL_NULL;
		545	PL_comppad = 0;
		546	PL_curpm = 0;
		547	PL_localizing = 0;
		548	PL_dirty = 0;
		549	PL_restartop = 0;
		550
		551	{
		552	dSP;
		553	LOGOP myop;
		554
		555	SvREFCNT_dec (GvAV (PL_defgv));
		556	GvAV (PL_defgv) = coro->args; coro->args = 0;
		557
		558	Zero (&myop, 1, LOGOP);
		559	myop.op_next = Nullop;
		560	myop.op_flags = OPf_WANT_VOID;
		561
		562	PUSHMARK (SP);
		563	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		564	PUTBACK;
		565	PL_op = (OP *)&myop;
		566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		567	SPAGAIN;
		568	}
		569
		570	ENTER; /* necessary e.g. for dounwind */
		571	}
		572
		573	static void
		574	free_coro_mortal ()
		575	{
		576	if (coro_mortal)
		577	{
		578	SvREFCNT_dec (coro_mortal);
		579	coro_mortal = 0;
		580	}
		581	}
		582
		583	/* inject a fake call to Coro::State::_cctx_init into the execution */
		584	static void NOINLINE
		585	prepare_cctx (coro_cctx *cctx)
		586	{
596	dSP;	587	dSP;
597	Coro__State ctx = (Coro__State)arg;	588	LOGOP myop;
598	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
599		589
600	coro_init_stacks (aTHX);	590	Zero (&myop, 1, LOGOP);
601	/PL_curcop = 0;/	591	myop.op_next = PL_op;
602	/PL_in_eval = PL_in_eval;/ /* inherit */	592	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
603	SvREFCNT_dec (GvAV (PL_defgv));
604	GvAV (PL_defgv) = ctx->args;
605		593
		594	PUSHMARK (SP);
		595	EXTEND (SP, 2);
		596	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		597	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		598	PUTBACK;
		599	PL_op = (OP *)&myop;
		600	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
606	SPAGAIN;	601	SPAGAIN;
607
608	if (ctx->stack)
609	{
610	ctx->cursp = 0;
611
612	PUSHMARK(SP);
613	PUTBACK;
614	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
615
616	if (SvTRUE (ERRSV))
617	croak (NULL);
618	else
619	croak ("FATAL: CCTXT coroutine returned!");
620	}
621	else
622	{
623	UNOP myop;
624
625	PL_op = (OP *)&myop;
626
627	Zero(&myop, 1, UNOP);
628	myop.op_next = Nullop;
629	myop.op_flags = OPf_WANT_VOID;
630
631	PUSHMARK(SP);
632	XPUSHs (sub_init);
633	/*
634	* the next line is slightly wrong, as PL_op->op_next
635	* is actually being executed so we skip the first op.
636	* that doesn't matter, though, since it is only
637	* pp_nextstate and we never return...
638	* ah yes, and I don't care anyways ;)
639	*/
640	PUTBACK;
641	PL_op = pp_entersub();
642	SPAGAIN;
643
644	ENTER; /* necessary e.g. for dounwind */
645	}
646	}	602	}
647		603
648	static void	604	static void
649	continue_coro (void *arg)	605	coro_run (void *arg)
650	{	606	{
		607	/* coro_run is the alternative tail of transfer(), so unlock here. */
		608	UNLOCK;
		609
651	/*	610	/*
652	* this is a _very_ stripped down perl interpreter ;)	611	* this is a _very_ stripped down perl interpreter ;)
653	*/	612	*/
654	Coro__State ctx = (Coro__State)arg;
655	JMPENV coro_start_env;
656
657	/* same as JMPENV_BOOTSTRAP */
658	Zero(&coro_start_env, 1, JMPENV);
659	coro_start_env.je_ret = -1;
660	coro_start_env.je_mustcatch = TRUE;
661	PL_top_env = &coro_start_env;	613	PL_top_env = &PL_start_env;
662		614
663	ctx->cursp = 0;	615	/* inject call to cctx_init */
664	PL_op = PL_op->op_next;	616	prepare_cctx ((coro_cctx *)arg);
665	CALLRUNOPS(aTHX);
666		617
		618	/* somebody will hit me for both perl_run and PL_restartop */
		619	PL_restartop = PL_op;
		620	perl_run (PL_curinterp);
		621
		622	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
667	abort ();	623	abort ();
668	}	624	}
669		625
670	STATIC void	626	static coro_cctx *
		627	cctx_new ()
		628	{
		629	coro_cctx *cctx;
		630
		631	++cctx_count;
		632
		633	Newz (0, cctx, 1, coro_cctx);
		634
		635	#if HAVE_MMAP
		636
		637	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		638	/* mmap supposedly does allocate-on-write for us */
		639	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		640
		641	if (cctx->sptr != (void *)-1)
		642	{
		643	# if STACKGUARD
		644	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		645	# endif
		646	REGISTER_STACK (
		647	cctx,
		648	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		649	cctx->ssize + (char *)cctx->sptr
		650	);
		651
		652	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		653	}
		654	else
		655	#endif
		656	{
		657	cctx->ssize = -STACKSIZE * (long)sizeof (long);
		658	New (0, cctx->sptr, STACKSIZE, long);
		659
		660	if (!cctx->sptr)
		661	{
		662	perror ("FATAL: unable to allocate stack for coroutine");
		663	_exit (EXIT_FAILURE);
		664	}
		665
		666	REGISTER_STACK (
		667	cctx,
		668	(char *)cctx->sptr,
		669	(char *)cctx->sptr - cctx->ssize
		670	);
		671
		672	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, -cctx->ssize);
		673	}
		674
		675	return cctx;
		676	}
		677
		678	static void
		679	cctx_destroy (coro_cctx *cctx)
		680	{
		681	if (!cctx)
		682	return;
		683
		684	--cctx_count;
		685
		686	#if USE_VALGRIND
		687	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		688	#endif
		689
		690	#if HAVE_MMAP
		691	if (cctx->ssize > 0)
		692	munmap (cctx->sptr, cctx->ssize);
		693	else
		694	#endif
		695	Safefree (cctx->sptr);
		696
		697	Safefree (cctx);
		698	}
		699
		700	static coro_cctx *
		701	cctx_get ()
		702	{
		703	coro_cctx *cctx;
		704
		705	if (cctx_first)
		706	{
		707	cctx = cctx_first;
		708	cctx_first = cctx->next;
		709	--cctx_idle;
		710	}
		711	else
		712	{
		713	cctx = cctx_new ();
		714	PL_op = PL_op->op_next;
		715	}
		716
		717	return cctx;
		718	}
		719
		720	static void
		721	cctx_put (coro_cctx *cctx)
		722	{
		723	/* free another cctx if overlimit */
		724	if (cctx_idle >= MAX_IDLE_CCTX)
		725	{
		726	coro_cctx *first = cctx_first;
		727	cctx_first = first->next;
		728	--cctx_idle;
		729
		730	assert (!first->inuse);
		731	cctx_destroy (first);
		732	}
		733
		734	++cctx_idle;
		735	cctx->next = cctx_first;
		736	cctx_first = cctx;
		737	}
		738
		739	/ coroutine switching ***************************************************/
		740
		741	/* never call directly, always through the coro_state_transfer global variable */
		742	static void NOINLINE
671	transfer(pTHX_ struct coro prev, struct coro next, int flags)	743	transfer (struct coro prev, struct coro next)
672	{	744	{
673	dSTACKLEVEL;	745	dSTACKLEVEL;
674	static struct coro *xnext;
675		746
		747	/* sometimes transfer is only called to set idle_sp */
		748	if (!next)
		749	{
		750	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		751	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		752	}
676	if (prev != next)	753	else if (prev != next)
677	{	754	{
678	xnext = next;	755	coro_cctx *prev__cctx;
679		756
680	if (next->mainstack)	757	if (prev->flags & CF_NEW)
681	{	758	{
682	SAVE (prev, flags);	759	/* create a new empty context */
683	LOAD (next);	760	Newz (0, prev->cctx, 1, coro_cctx);
684		761	prev->cctx->inuse = 1;
685	/* mark this state as in-use */	762	prev->flags &= ~CF_NEW;
686	next->mainstack = 0;	763	prev->flags \|= CF_RUNNING;
687	next->tmps_ix = -2;
688
689	/* stacklevel changed? if yes, grab the stack for us! */
690	if (flags & TRANSFER_SAVE_CCTXT)
691	{
692	if (!prev->stack)
693	allocate_stack (prev, 0);
694	else if (prev->cursp != stacklevel
695	&& prev->stack->usecnt > 1)
696	{
697	prev->gencnt = ++prev->stack->gencnt;
698	prev->stack->usecnt = 1;
699	}
700
701	/* has our stack been invalidated? */
702	if (next->stack && next->stack->gencnt != next->gencnt)
703	{
704	deallocate_stack (next);
705	allocate_stack (next, 1);
706	coro_create (&(next->stack->cctx),
707	continue_coro, (void *)next,
708	next->stack->sptr, labs (next->stack->ssize));
709	}
710
711	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712	/* don't add any code here */
713	}
714
715	}	764	}
716	else if (next->tmps_ix == -2)	765
717	croak ("tried to transfer to running coroutine");	766	/TODO: must not croak here /
		767	if (!prev->flags & CF_RUNNING)
		768	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		769
		770	if (next->flags & CF_RUNNING)
		771	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		772
		773	if (next->flags & CF_DESTROYED)
		774	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		775
		776	prev->flags &= ~CF_RUNNING;
		777	next->flags \|= CF_RUNNING;
		778
		779	LOCK;
		780
		781	if (next->flags & CF_NEW)
		782	{
		783	/* need to start coroutine */
		784	next->flags &= ~CF_NEW;
		785	/* first get rid of the old state */
		786	save_perl (prev);
		787	/* setup coroutine call */
		788	setup_coro (next);
		789	/* need a new stack */
		790	assert (!next->cctx);
		791	}
718	else	792	else
719	{	793	{
720	SAVE (prev, -1); /* first get rid of the old state */	794	/* coroutine already started */
721		795	save_perl (prev);
722	if (flags & TRANSFER_SAVE_CCTXT)	796	load_perl (next);
723	{
724	if (!prev->stack)
725	allocate_stack (prev, 0);
726
727	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
728	{
729	setup_coro (next);
730
731	prev->stack->refcnt++;
732	prev->stack->usecnt++;
733	next->stack = prev->stack;
734	next->gencnt = prev->gencnt;
735	}
736	else
737	{
738	allocate_stack (next, 1);
739	coro_create (&(next->stack->cctx),
740	setup_coro, (void *)next,
741	next->stack->sptr, labs (next->stack->ssize));
742	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743	/* don't add any code here */
744	}
745	}
746	else
747	setup_coro (next);
748	}	797	}
		798
		799	prev__cctx = prev->cctx;
		800
		801	/* possibly "free" the cctx */
		802	if (prev__cctx->idle_sp == STACKLEVEL)
		803	{
		804	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		805	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		806
		807	prev->cctx = 0;
		808
		809	cctx_put (prev__cctx);
		810	prev__cctx->inuse = 0;
		811	}
		812
		813	if (!next->cctx)
		814	{
		815	next->cctx = cctx_get ();
		816	assert (!next->cctx->inuse);
		817	next->cctx->inuse = 1;
		818	}
		819
		820	if (prev__cctx != next->cctx)
		821	{
		822	prev__cctx->top_env = PL_top_env;
		823	PL_top_env = next->cctx->top_env;
		824	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		825	}
		826
		827	free_coro_mortal ();
		828	UNLOCK;
		829	}
		830	}
		831
		832	struct transfer_args
		833	{
		834	struct coro prev, next;
		835	};
		836
		837	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
		838
		839	/ high level stuff ******************************************************/
		840
		841	static int
		842	coro_state_destroy (struct coro *coro)
		843	{
		844	if (coro->flags & CF_DESTROYED)
		845	return 0;
		846
		847	coro->flags \|= CF_DESTROYED;
		848
		849	if (coro->flags & CF_READY)
749	}	850	{
		851	/* reduce nready, as destroying a ready coro effectively unreadies it */
		852	/* alternative: look through all ready queues and remove the coro */
		853	LOCK;
		854	--coro_nready;
		855	UNLOCK;
		856	}
		857	else
		858	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
750		859
751	/*	860	if (coro->mainstack && coro->mainstack != main_mainstack)
752	* xnext is now either prev or next, depending on wether	861	{
753	* we switched the c stack or not. that's why i use a global	862	struct coro temp;
754	* variable, that should become thread-specific at one point.	863
755	*/	864	assert (!(coro->flags & CF_RUNNING));
756	xnext->cursp = stacklevel;	865
		866	Zero (&temp, 1, struct coro);
		867	temp.save = CORO_SAVE_ALL;
		868
		869	if (coro->flags & CF_RUNNING)
		870	croak ("FATAL: tried to destroy currently running coroutine");
		871
		872	save_perl (&temp);
		873	load_perl (coro);
		874
		875	coro_destroy_stacks ();
		876
		877	load_perl (&temp); /* this will get rid of defsv etc.. */
		878
		879	coro->mainstack = 0;
		880	}
		881
		882	cctx_destroy (coro->cctx);
		883	SvREFCNT_dec (coro->args);
		884
		885	return 1;
757	}	886	}
		887
		888	static int
		889	coro_state_free (pTHX_ SV sv, MAGIC mg)
		890	{
		891	struct coro coro = (struct coro )mg->mg_ptr;
		892	mg->mg_ptr = 0;
		893
		894	if (--coro->refcnt < 0)
		895	{
		896	coro_state_destroy (coro);
		897	Safefree (coro);
		898	}
		899
		900	return 0;
		901	}
		902
		903	static int
		904	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		905	{
		906	struct coro coro = (struct coro )mg->mg_ptr;
		907
		908	++coro->refcnt;
		909
		910	return 0;
		911	}
		912
		913	static MGVTBL coro_state_vtbl = {
		914	0, 0, 0, 0,
		915	coro_state_free,
		916	0,
		917	#ifdef MGf_DUP
		918	coro_state_dup,
		919	#else
		920	# define MGf_DUP 0
		921	#endif
		922	};
758		923
759	static struct coro *	924	static struct coro *
760	sv_to_coro (SV arg, const char funcname, const char *varname)	925	SvSTATE (SV *coro)
761	{	926	{
762	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	927	HV *stash;
763	{	928	MAGIC *mg;
764	HE he = hv_fetch_ent((HV )SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
765		929
766	if (!he)	930	if (SvROK (coro))
767	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);	931	coro = SvRV (coro);
768		932
769	arg = HeVAL(he);	933	stash = SvSTASH (coro);
		934	if (stash != coro_stash && stash != coro_state_stash)
770	}	935	{
		936	/* very slow, but rare, check */
		937	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		938	croak ("Coro::State object required");
771		939	}
772	/* must also be changed inside Coro::Cont::yield */
773	if (SvROK(arg) && SvOBJECT(SvRV(arg))
774	&& SvSTASH(SvRV(arg)) == coro_state_stash)
775	return (struct coro ) SvIV((SV)SvRV(arg));
776		940
777	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	941	mg = SvMAGIC (coro);
778	/NORETURN/	942	assert (mg->mg_type == PERL_MAGIC_ext);
		943	return (struct coro *)mg->mg_ptr;
779	}	944	}
780		945
		946	static void
		947	prepare_transfer (struct transfer_args ta, SV prev_sv, SV *next_sv)
		948	{
		949	ta->prev = SvSTATE (prev_sv);
		950	ta->next = SvSTATE (next_sv);
		951	}
		952
		953	static void
		954	api_transfer (SV prev_sv, SV next_sv)
		955	{
		956	struct transfer_args ta;
		957
		958	prepare_transfer (&ta, prev_sv, next_sv);
		959	TRANSFER (ta);
		960	}
		961
781	static void	962	static int
782	api_transfer(pTHX_ SV prev, SV next, int flags)	963	api_save (SV *coro_sv, int new_save)
783	{	964	{
784	transfer(aTHX_	965	struct coro *coro = SvSTATE (coro_sv);
785	sv_to_coro (prev, "Coro::transfer", "prev"),	966	int old_save = coro->save;
786	sv_to_coro (next, "Coro::transfer", "next"),	967
787	flags);	968	if (new_save >= 0)
		969	coro->save = new_save;
		970
		971	return old_save;
788	}	972	}
789		973
790	/ Coro ******************************************************************/	974	/ Coro ******************************************************************/
791		975
792	#define PRIO_MAX 3
793	#define PRIO_HIGH 1
794	#define PRIO_NORMAL 0
795	#define PRIO_LOW -1
796	#define PRIO_IDLE -3
797	#define PRIO_MIN -4
798
799	/* for Coro.pm */
800	static GV coro_current, coro_idle;
801	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
802	static int coro_nready;
803
804	static void	976	static void
805	coro_enq (SV *sv)	977	coro_enq (SV *coro_sv)
806	{	978	{
807	if (SvROK (sv))	979	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
808	{
809	SV *hv = SvRV (sv);
810	if (SvTYPE (hv) == SVt_PVHV)
811	{
812	SV *xprio = hv_fetch ((HV )hv, "prio", 4, 0);
813	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
814
815	prio = prio > PRIO_MAX ? PRIO_MAX
816	: prio < PRIO_MIN ? PRIO_MIN
817	: prio;
818
819	av_push (coro_ready [prio - PRIO_MIN], sv);
820	coro_nready++;
821
822	return;
823	}
824	}
825
826	croak ("Coro::ready tried to enqueue something that is not a coroutine");
827	}	980	}
828		981
829	static SV *	982	static SV *
830	coro_deq (int min_prio)	983	coro_deq (int min_prio)
831	{	984	{
…		…
834	min_prio -= PRIO_MIN;	987	min_prio -= PRIO_MIN;
835	if (min_prio < 0)	988	if (min_prio < 0)
836	min_prio = 0;	989	min_prio = 0;
837		990
838	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	991	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
839	if (av_len (coro_ready[prio]) >= 0)	992	if (AvFILLp (coro_ready [prio]) >= 0)
840	{
841	coro_nready--;
842	return av_shift (coro_ready[prio]);	993	return av_shift (coro_ready [prio]);
843	}
844		994
845	return 0;	995	return 0;
846	}	996	}
847		997
848	static void	998	static int
849	api_ready (SV *coro)	999	api_ready (SV *coro_sv)
850	{	1000	{
		1001	struct coro *coro;
		1002
		1003	if (SvROK (coro_sv))
		1004	coro_sv = SvRV (coro_sv);
		1005
		1006	coro = SvSTATE (coro_sv);
		1007
		1008	if (coro->flags & CF_READY)
		1009	return 0;
		1010
		1011	coro->flags \|= CF_READY;
		1012
		1013	LOCK;
851	coro_enq (SvREFCNT_inc (coro));	1014	coro_enq (SvREFCNT_inc (coro_sv));
852	}	1015	++coro_nready;
		1016	UNLOCK;
853		1017
		1018	return 1;
		1019	}
		1020
854	static void	1021	static int
855	api_schedule (int cede)	1022	api_is_ready (SV *coro_sv)
856	{	1023	{
		1024	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1025	}
		1026
		1027	static void
		1028	prepare_schedule (struct transfer_args *ta)
		1029	{
857	SV prev, next;	1030	SV prev_sv, next_sv;
858		1031
859	prev = GvSV (coro_current);	1032	for (;;)
860		1033	{
861	if (cede)	1034	LOCK;
862	coro_enq (SvREFCNT_inc (prev));
863
864	next = coro_deq (PRIO_MIN);	1035	next_sv = coro_deq (PRIO_MIN);
865		1036
		1037	/* nothing to schedule: call the idle handler */
866	if (!next)	1038	if (!next_sv)
867	next = SvREFCNT_inc (GvSV (coro_idle));	1039	{
		1040	dSP;
		1041	UNLOCK;
868		1042
869	GvSV (coro_current) = SvREFCNT_inc (next);	1043	ENTER;
870	transfer (aTHX_	1044	SAVETMPS;
871	sv_to_coro (prev, "Coro::schedule", "current coroutine"),	1045
872	sv_to_coro (next, "Coro::schedule", "next coroutine"),	1046	PUSHMARK (SP);
873	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);	1047	PUTBACK;
		1048	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1049
		1050	FREETMPS;
		1051	LEAVE;
		1052	continue;
		1053	}
		1054
		1055	ta->next = SvSTATE (next_sv);
		1056
		1057	/* cannot transfer to destroyed coros, skip and look for next */
		1058	if (ta->next->flags & CF_DESTROYED)
		1059	{
		1060	UNLOCK;
874	SvREFCNT_dec (next);	1061	SvREFCNT_dec (next_sv);
875	SvREFCNT_dec (prev);	1062	/* coro_nready is already taken care of by destroy */
		1063	continue;
		1064	}
		1065
		1066	--coro_nready;
		1067	UNLOCK;
		1068	break;
		1069	}
		1070
		1071	/* free this only after the transfer */
		1072	prev_sv = SvRV (coro_current);
		1073	SvRV_set (coro_current, next_sv);
		1074	ta->prev = SvSTATE (prev_sv);
		1075
		1076	assert (ta->next->flags & CF_READY);
		1077	ta->next->flags &= ~CF_READY;
		1078
		1079	LOCK;
		1080	free_coro_mortal ();
		1081	coro_mortal = prev_sv;
		1082	UNLOCK;
		1083	}
		1084
		1085	static void
		1086	prepare_cede (struct transfer_args *ta)
		1087	{
		1088	api_ready (coro_current);
		1089	prepare_schedule (ta);
		1090	}
		1091
		1092	static int
		1093	prepare_cede_notself (struct transfer_args *ta)
		1094	{
		1095	if (coro_nready)
		1096	{
		1097	SV *prev = SvRV (coro_current);
		1098	prepare_schedule (ta);
		1099	api_ready (prev);
		1100	return 1;
		1101	}
		1102	else
		1103	return 0;
		1104	}
		1105
		1106	static void
		1107	api_schedule (void)
		1108	{
		1109	struct transfer_args ta;
		1110
		1111	prepare_schedule (&ta);
		1112	TRANSFER (ta);
		1113	}
		1114
		1115	static int
		1116	api_cede (void)
		1117	{
		1118	struct transfer_args ta;
		1119
		1120	prepare_cede (&ta);
		1121
		1122	if (ta.prev != ta.next)
		1123	{
		1124	TRANSFER (ta);
		1125	return 1;
		1126	}
		1127	else
		1128	return 0;
		1129	}
		1130
		1131	static int
		1132	api_cede_notself (void)
		1133	{
		1134	struct transfer_args ta;
		1135
		1136	if (prepare_cede_notself (&ta))
		1137	{
		1138	TRANSFER (ta);
		1139	return 1;
		1140	}
		1141	else
		1142	return 0;
876	}	1143	}
877		1144
878	MODULE = Coro::State PACKAGE = Coro::State	1145	MODULE = Coro::State PACKAGE = Coro::State
879		1146
880	PROTOTYPES: ENABLE	1147	PROTOTYPES: DISABLE
881		1148
882	BOOT:	1149	BOOT:
883	{ /* {} necessary for stoopid perl-5.6.x */	1150	{
884	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1151	#ifdef USE_ITHREADS
885	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1152	MUTEX_INIT (&coro_mutex);
		1153	#endif
		1154	BOOT_PAGESIZE;
		1155
886	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1156	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887		1157
888	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1158	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
889	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1159	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
890	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1160	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1161	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
891	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1162	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
892
893	if (!padlist_cache)
894	padlist_cache = newHV ();
895		1163
896	main_mainstack = PL_mainstack;	1164	main_mainstack = PL_mainstack;
897		1165
898	coroapi.ver = CORO_API_VERSION;	1166	coroapi.ver = CORO_API_VERSION;
899	coroapi.transfer = api_transfer;	1167	coroapi.transfer = api_transfer;
900	}
901		1168
902	Coro::State	1169	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
903	_newprocess(args)	1170	}
904	SV * args	1171
905	PROTOTYPE: $	1172	SV *
		1173	new (char *klass, ...)
906	CODE:	1174	CODE:
907	Coro__State coro;	1175	{
		1176	struct coro *coro;
		1177	HV *hv;
		1178	int i;
908		1179
909	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
910	croak ("Coro::State::_newprocess expects an arrayref");
911
912	New (0, coro, 1, struct coro);	1180	Newz (0, coro, 1, struct coro);
		1181	coro->args = newAV ();
		1182	coro->save = CORO_SAVE_ALL;
		1183	coro->flags = CF_NEW;
913		1184
914	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1185	hv = newHV ();
915	coro->mainstack = 0; /* actual work is done inside transfer */	1186	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
916	coro->stack = 0;	1187	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
917		1188
918	RETVAL = coro;	1189	for (i = 1; i < items; i++)
		1190	av_push (coro->args, newSVsv (ST (i)));
		1191	}
919	OUTPUT:	1192	OUTPUT:
920	RETVAL	1193	RETVAL
921		1194
		1195	int
		1196	save (SV *coro, int new_save = -1)
		1197	CODE:
		1198	RETVAL = api_save (coro, new_save);
		1199	OUTPUT:
		1200	RETVAL
		1201
922	void	1202	void
923	transfer(prev, next, flags)	1203	_set_stacklevel (...)
924	Coro::State_or_hashref prev	1204	ALIAS:
925	Coro::State_or_hashref next	1205	Coro::State::transfer = 1
926	int flags	1206	Coro::schedule = 2
927	PROTOTYPE: @	1207	Coro::cede = 3
		1208	Coro::cede_notself = 4
928	CODE:	1209	CODE:
929	PUTBACK;	1210	{
930	transfer (aTHX_ prev, next, flags);	1211	struct transfer_args ta;
931	SPAGAIN;	1212
		1213	switch (ix)
		1214	{
		1215	case 0:
		1216	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1217	ta.next = 0;
		1218	break;
		1219
		1220	case 1:
		1221	if (items != 2)
		1222	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1223
		1224	prepare_transfer (&ta, ST (0), ST (1));
		1225	break;
		1226
		1227	case 2:
		1228	prepare_schedule (&ta);
		1229	break;
		1230
		1231	case 3:
		1232	prepare_cede (&ta);
		1233	break;
		1234
		1235	case 4:
		1236	if (!prepare_cede_notself (&ta))
		1237	XSRETURN_EMPTY;
		1238
		1239	break;
		1240	}
		1241
		1242	BARRIER;
		1243	TRANSFER (ta);
		1244
		1245	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1246	XSRETURN_YES;
		1247	}
		1248
		1249	bool
		1250	_destroy (SV *coro_sv)
		1251	CODE:
		1252	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
		1253	OUTPUT:
		1254	RETVAL
932		1255
933	void	1256	void
934	DESTROY(coro)
935	Coro::State coro
936	CODE:
937
938	if (coro->mainstack && coro->mainstack != main_mainstack)
939	{
940	struct coro temp;
941
942	PUTBACK;
943	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
944	LOAD(aTHX_ coro);
945	SPAGAIN;
946
947	destroy_stacks (aTHX);
948
949	LOAD((&temp)); /* this will get rid of defsv etc.. */
950	SPAGAIN;
951
952	coro->mainstack = 0;
953	}
954
955	deallocate_stack (coro);
956
957	Safefree (coro);
958
959	void
960	flush()
961	CODE:
962	#ifdef MAY_FLUSH
963	flush_padlist_cache ();
964	#endif
965
966	void
967	_exit(code)	1257	_exit (code)
968	int code	1258	int code
969	PROTOTYPE: $	1259	PROTOTYPE: $
970	CODE:	1260	CODE:
971	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
972	_exit (code);	1261	_exit (code);
973	#else
974	signal (SIGTERM, SIG_DFL);
975	raise (SIGTERM);
976	exit (code);
977	#endif
978		1262
979	MODULE = Coro::State PACKAGE = Coro::Cont	1263	int
		1264	cctx_count ()
		1265	CODE:
		1266	RETVAL = cctx_count;
		1267	OUTPUT:
		1268	RETVAL
980		1269
981	# this is slightly dirty (should expose a c-level api)	1270	int
982		1271	cctx_idle ()
983	void	1272	CODE:
984	yield(...)	1273	RETVAL = cctx_idle;
985	PROTOTYPE: @	1274	OUTPUT:
986	CODE:	1275	RETVAL
987	static SV *returnstk;
988	SV *sv;
989	AV *defav = GvAV (PL_defgv);
990	struct coro prev, next;
991
992	if (!returnstk)
993	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
994
995	/* set up @_ -- ugly */
996	av_clear (defav);
997	av_fill (defav, items - 1);
998	while (items--)
999	av_store (defav, items, SvREFCNT_inc (ST(items)));
1000
1001	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1002	sv = av_pop ((AV *)SvRV (returnstk));
1003	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
1004	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
1005	SvREFCNT_dec (sv);
1006
1007	transfer(aTHX_ prev, next, 0);
1008		1276
1009	MODULE = Coro::State PACKAGE = Coro	1277	MODULE = Coro::State PACKAGE = Coro
1010		1278
1011	# this is slightly dirty (should expose a c-level api)
1012
1013	BOOT:	1279	BOOT:
1014	{	1280	{
1015	int i;	1281	int i;
		1282
1016	HV *stash = gv_stashpv ("Coro", TRUE);	1283	coro_stash = gv_stashpv ("Coro", TRUE);
1017		1284
1018	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1285	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1286	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1287	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1288	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1289	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1290	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1024		1291
1025	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1292	coro_current = get_sv ("Coro::current", FALSE);
1026	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1293	SvREADONLY_on (coro_current);
1027		1294
1028	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1295	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1029	coro_ready[i] = newAV ();	1296	coro_ready[i] = newAV ();
1030		1297
1031	{	1298	{
1032	SV *sv = perl_get_sv("Coro::API", 1);	1299	SV *sv = perl_get_sv("Coro::API", 1);
1033		1300
1034	coroapi.schedule = api_schedule;	1301	coroapi.schedule = api_schedule;
		1302	coroapi.save = api_save;
		1303	coroapi.cede = api_cede;
		1304	coroapi.cede_notself = api_cede_notself;
1035	coroapi.ready = api_ready;	1305	coroapi.ready = api_ready;
		1306	coroapi.is_ready = api_is_ready;
1036	coroapi.nready = &coro_nready;	1307	coroapi.nready = &coro_nready;
1037	coroapi.current = coro_current;	1308	coroapi.current = coro_current;
1038		1309
1039	GCoroAPI = &coroapi;	1310	GCoroAPI = &coroapi;
1040	sv_setiv(sv, (IV)&coroapi);	1311	sv_setiv (sv, (IV)&coroapi);
1041	SvREADONLY_on(sv);	1312	SvREADONLY_on (sv);
1042	}	1313	}
1043	}	1314	}
1044		1315
1045	void	1316	void
1046	ready(self)	1317	_set_current (SV *current)
1047	SV * self	1318	PROTOTYPE: $
1048	CODE:	1319	CODE:
1049	api_ready (self);	1320	SvREFCNT_dec (SvRV (coro_current));
		1321	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1050		1322
1051	int	1323	int
		1324	prio (Coro::State coro, int newprio = 0)
		1325	ALIAS:
		1326	nice = 1
		1327	CODE:
		1328	{
		1329	RETVAL = coro->prio;
		1330
		1331	if (items > 1)
		1332	{
		1333	if (ix)
		1334	newprio = coro->prio - newprio;
		1335
		1336	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1337	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1338
		1339	coro->prio = newprio;
		1340	}
		1341	}
		1342	OUTPUT:
		1343	RETVAL
		1344
		1345	SV *
		1346	ready (SV *self)
		1347	PROTOTYPE: $
		1348	CODE:
		1349	RETVAL = boolSV (api_ready (self));
		1350	OUTPUT:
		1351	RETVAL
		1352
		1353	SV *
		1354	is_ready (SV *self)
		1355	PROTOTYPE: $
		1356	CODE:
		1357	RETVAL = boolSV (api_is_ready (self));
		1358	OUTPUT:
		1359	RETVAL
		1360
		1361	int
1052	nready(...)	1362	nready (...)
1053	PROTOTYPE:	1363	PROTOTYPE:
1054	CODE:	1364	CODE:
1055	RETVAL = coro_nready;	1365	RETVAL = coro_nready;
1056	OUTPUT:	1366	OUTPUT:
1057	RETVAL	1367	RETVAL
1058		1368
		1369	MODULE = Coro::State PACKAGE = Coro::AIO
		1370
		1371	SV *
		1372	_get_state ()
		1373	CODE:
		1374	{
		1375	struct io_state *data;
		1376
		1377	RETVAL = newSV (sizeof (struct io_state));
		1378	data = (struct io_state *)SvPVX (RETVAL);
		1379	SvCUR_set (RETVAL, sizeof (struct io_state));
		1380	SvPOK_only (RETVAL);
		1381
		1382	data->errorno = errno;
		1383	data->laststype = PL_laststype;
		1384	data->laststatval = PL_laststatval;
		1385	data->statcache = PL_statcache;
		1386	}
		1387	OUTPUT:
		1388	RETVAL
		1389
1059	void	1390	void
1060	schedule(...)	1391	_set_state (char *data_)
1061	PROTOTYPE:	1392	PROTOTYPE: $
1062	ALIAS:
1063	cede = 1
1064	CODE:	1393	CODE:
1065	api_schedule (ix);	1394	{
		1395	struct io_state data = (void )data_;
1066		1396
		1397	errno = data->errorno;
		1398	PL_laststype = data->laststype;
		1399	PL_laststatval = data->laststatval;
		1400	PL_statcache = data->statcache;
		1401	}
		1402

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Comparing Coro/Coro/State.xs (file contents): Revision 1.33 by root, Sun Aug 26 21:44:20 2001 UTC vs. Revision 1.142 by root, Tue Feb 13 19:21:29 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.33 by root, Sun Aug 26 21:44:20 2001 UTC vs.
Revision 1.142 by root, Tue Feb 13 19:21:29 2007 UTC