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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.41 by root, Tue Nov 27 02:51:03 2001 UTC vs.
Revision 1.143 by root, Wed Feb 28 11:43:03 2007 UTC

…		…
		1	#include "libcoro/coro.c"
		2
1	#include "EXTERN.h"	3	#include "EXTERN.h"
2	#include "perl.h"	4	#include "perl.h"
3	#include "XSUB.h"	5	#include "XSUB.h"
4		6
5	#include "libcoro/coro.c"	7	#include "patchlevel.h"
6		8
7	#include <signal.h>	9	#include <stdio.h>
		10	#include <errno.h>
		11	#include <assert.h>
8		12
9	#ifdef HAVE_MMAP	13	#ifdef HAVE_MMAP
10	# include <unistd.h>	14	# include <unistd.h>
11	# include <sys/mman.h>	15	# include <sys/mman.h>
12	# ifndef MAP_ANONYMOUS	16	# ifndef MAP_ANONYMOUS
14	# define MAP_ANONYMOUS MAP_ANON	18	# define MAP_ANONYMOUS MAP_ANON
15	# else	19	# else
16	# undef HAVE_MMAP	20	# undef HAVE_MMAP
17	# endif	21	# endif
18	# endif	22	# endif
		23	# include <limits.h>
		24	# ifndef PAGESIZE
		25	# define PAGESIZE pagesize
		26	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		27	static long pagesize;
		28	# else
		29	# define BOOT_PAGESIZE (void)0
19	#endif	30	# endif
		31	#else
		32	# define PAGESIZE 0
		33	# define BOOT_PAGESIZE (void)0
		34	#endif
20		35
21	#define MAY_FLUSH /* increases codesize and is rarely used */	36	#if CORO_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 CORO_STACKGUARD
		80	#endif
		81
		82	#ifndef CORO_STACKGUARD
		83	# define CORO_STACKGUARD 0
		84	#endif
		85
		86	/* prefer perl internal functions over our own? */
		87	#ifndef CORO_PREFER_PERL_FUNCTIONS
		88	# define CORO_PREFER_PERL_FUNCTIONS 0
		89	#endif
25		90
26	/* The next macro should declare a variable stacklevel that contains and approximation	91	/* The next macro should declare a variable stacklevel that contains and approximation
27	* to the current C stack pointer. Its property is that it changes with each call	92	* to the current C stack pointer. Its property is that it changes with each call
28	* and should be unique. */	93	* and should be unique. */
		94	#define dSTACKLEVEL int stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	95	#define STACKLEVEL ((void *)&stacklevel)
30		96
31	#define IN_DESTRUCT (PL_main_cv == Nullcv)	97	#define IN_DESTRUCT (PL_main_cv == Nullcv)
32		98
33	#define labs(l) ((l) >= 0 ? (l) : -(l))	99	#if __GNUC__ >= 3
		100	# define attribute(x) __attribute__(x)
		101	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		102	#else
		103	# define attribute(x)
		104	# define BARRIER
		105	#endif
		106
		107	#define NOINLINE attribute ((noinline))
34		108
35	#include "CoroAPI.h"	109	#include "CoroAPI.h"
36		110
		111	#ifdef USE_ITHREADS
		112	static perl_mutex coro_mutex;
		113	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		114	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		115	#else
		116	# define LOCK (void)0
		117	# define UNLOCK (void)0
		118	#endif
		119
		120	/* helper storage struct for Coro::AIO */
		121	struct io_state
		122	{
		123	int errorno;
		124	I32 laststype;
		125	int laststatval;
		126	Stat_t statcache;
		127	};
		128
37	static struct CoroAPI coroapi;	129	static struct CoroAPI coroapi;
		130	static AV main_mainstack; / used to differentiate between $main and others */
		131	static HV coro_state_stash, coro_stash;
		132	static SV coro_mortal; / will be freed after next transfer */
38		133
39	/* this is actually not only the c stack but also c registers etc... */	134	static struct coro_cctx *cctx_first;
		135	static int cctx_count, cctx_idle;
		136
		137	/* this is a structure representing a c-level coroutine */
40	typedef struct {	138	typedef struct coro_cctx {
41	int refcnt; /* pointer reference counter */	139	struct coro_cctx *next;
42	int usecnt; /* shared by how many coroutines */
43	int gencnt; /* generation counter */
44		140
		141	/* the stack */
		142	void *sptr;
		143	ssize_t ssize; /* positive == mmap, otherwise malloc */
		144
		145	/* cpu state */
		146	void idle_sp; / sp of top-level transfer/schedule/cede call */
		147	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		148	JMPENV *top_env;
45	coro_context cctx;	149	coro_context cctx;
46		150
47	void *sptr;	151	int inuse;
48	long ssize; /* positive == mmap, otherwise malloc */
49	} coro_stack;
50		152
		153	#if CORO_USE_VALGRIND
		154	int valgrind_id;
		155	#endif
		156	} coro_cctx;
		157
		158	enum {
		159	CF_RUNNING = 0x0001, /* coroutine is running */
		160	CF_READY = 0x0002, /* coroutine is ready */
		161	CF_NEW = 0x0004, /* has never been switched to */
		162	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		163	};
		164
		165	/* this is a structure representing a perl-level coroutine */
51	struct coro {	166	struct coro {
52	/* the optional C context */	167	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	168	coro_cctx *cctx;
54	void *cursp;
55	int gencnt;
56
57	/* optionally saved, might be zero */
58	AV *defav;
59	SV *defsv;
60	SV *errsv;
61
62	/* saved global state not related to stacks */
63	U8 dowarn;
64	I32 in_eval;
65
66	/* the stacks and related info (callchain etc..) */
67	PERL_SI *curstackinfo;
68	AV *curstack;
69	AV *mainstack;
70	SV **stack_sp;
71	OP *op;
72	SV **curpad;
73	SV **stack_base;
74	SV **stack_max;
75	SV **tmps_stack;
76	I32 tmps_floor;
77	I32 tmps_ix;
78	I32 tmps_max;
79	I32 *markstack;
80	I32 *markstack_ptr;
81	I32 *markstack_max;
82	I32 *scopestack;
83	I32 scopestack_ix;
84	I32 scopestack_max;
85	ANY *savestack;
86	I32 savestack_ix;
87	I32 savestack_max;
88	OP **retstack;
89	I32 retstack_ix;
90	I32 retstack_max;
91	COP *curcop;
92	JMPENV *top_env;
93		169
94	/* data associated with this coroutine (initial args) */	170	/* data associated with this coroutine (initial args) */
95	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;
96	};	189	};
97		190
98	typedef struct coro *Coro__State;	191	typedef struct coro *Coro__State;
99	typedef struct coro *Coro__State_or_hashref;	192	typedef struct coro *Coro__State_or_hashref;
100		193
101	static AV main_mainstack; / used to differentiate between $main and others */	194	/ Coro ******************************************************************/
102	static HV *coro_state_stash;
103	static SV *ucoro_state_sv;
104	static U32 ucoro_state_hash;
105	static HV *padlist_cache;
106	static SV coro_mortal; / will be freed after next transfer */
107		195
108	/* mostly copied from op.c:cv_clone2 */	196	#define PRIO_MAX 3
109	STATIC AV *	197	#define PRIO_HIGH 1
110	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)
111	{	212	{
112	AV *av;	213	AV *padlist = CvPADLIST (cv);
113	I32 ix;
114	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
115	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
116	SV **pname = AvARRAY (protopad_name);
117	SV **ppad = AvARRAY (protopad);
118	I32 fname = AvFILLp (protopad_name);
119	I32 fpad = AvFILLp (protopad);
120	AV newpadlist, newpad_name, *newpad;	214	AV newpadlist, newpad;
121	SV **npad;
122
123	newpad_name = newAV ();
124	for (ix = fname; ix >= 0; ix--)
125	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
126
127	newpad = newAV ();
128	av_fill (newpad, AvFILLp (protopad));
129	npad = AvARRAY (newpad);
130		215
131	newpadlist = newAV ();	216	newpadlist = newAV ();
132	AvREAL_off (newpadlist);	217	AvREAL_off (newpadlist);
133	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)));
134	av_store (newpadlist, 1, (SV *) newpad);	227	av_store (newpadlist, 1, (SV *)newpad);
135		228
136	av = newAV (); /* will be @_ */	229	return newpadlist;
137	av_extend (av, 0);	230	}
138	av_store (newpad, 0, (SV *) av);
139	AvFLAGS (av) = AVf_REIFY;
140		231
141	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))
142	{	237	{
143	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	238	I32 i = AvFILLp (padlist);
144	if (namesv && namesv != &PL_sv_undef)	239	while (i >= 0)
145	{	240	{
146	char name = SvPVX (namesv); / XXX */	241	SV **svp = av_fetch (padlist, i--, FALSE);
147	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')	242	if (svp)
148	{ /* lexical from outside? */
149	npad[ix] = SvREFCNT_inc (ppad[ix]);
150	}	243	{
151	else
152	{ /* our own lexical */
153	SV *sv;	244	SV *sv;
154	if (*name == '&')	245	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
155	sv = SvREFCNT_inc (ppad[ix]);	246	SvREFCNT_dec (sv);
156	else if (*name == '@')	247
157	sv = (SV *) newAV ();	248	SvREFCNT_dec (*svp);
158	else if (*name == '%')
159	sv = (SV *) newHV ();
160	else
161	sv = NEWSV (0, 0);
162	if (!SvPADBUSY (sv))
163	SvPADMY_on (sv);
164	npad[ix] = sv;
165	}	249	}
166	}	250	}
167	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
168	{
169	npad[ix] = SvREFCNT_inc (ppad[ix]);
170	}
171	else
172	{
173	SV *sv = NEWSV (0, 0);
174	SvPADTMP_on (sv);
175	npad[ix] = sv;
176	}
177	}
178		251
179	#if 0 /* return -ENOTUNDERSTOOD */
180	/* Now that vars are all in place, clone nested closures. */
181
182	for (ix = fpad; ix > 0; ix--) {
183	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
184	if (namesv
185	&& namesv != &PL_sv_undef
186	&& !(SvFLAGS(namesv) & SVf_FAKE)
187	&& *SvPVX(namesv) == '&'
188	&& CvCLONE(ppad[ix]))
189	{
190	CV kid = cv_clone((CV)ppad[ix]);
191	SvREFCNT_dec(ppad[ix]);
192	CvCLONE_on(kid);
193	SvPADMY_on(kid);
194	npad[ix] = (SV*)kid;
195	}
196	}
197	#endif
198
199	return newpadlist;
200	}
201
202	#ifdef MAY_FLUSH
203	STATIC void
204	free_padlist (AV *padlist)
205	{
206	/* may be during global destruction */
207	if (SvREFCNT(padlist))
208	{
209	I32 i = AvFILLp(padlist);
210	while (i >= 0)
211	{
212	SV **svp = av_fetch(padlist, i--, FALSE);
213	SV sv = svp ? svp : Nullsv;
214	if (sv)
215	SvREFCNT_dec(sv);
216	}
217
218	SvREFCNT_dec((SV*)padlist);	252	SvREFCNT_dec ((SV*)padlist);
219	}	253	}
220	}	254	}
221	#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
222		281
223	/* the next two functions merely cache the padlists */	282	/* the next two functions merely cache the padlists */
224	STATIC void	283	static void
225	get_padlist (CV *cv)	284	get_padlist (CV *cv)
226	{	285	{
227	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);	286	MAGIC *mg = CORO_MAGIC (cv);
		287	AV *av;
228		288
229	if (he && AvFILLp ((AV )he) >= 0)	289	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
230	CvPADLIST (cv) = (AV )av_pop ((AV )*he);	290	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	291	else
		292	{
		293	#if CORO_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
232	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	300	CvPADLIST (cv) = coro_clone_padlist (cv);
		301	#endif
		302	}
233	}	303	}
234		304
235	STATIC void	305	static void
236	put_padlist (CV *cv)	306	put_padlist (CV *cv)
237	{	307	{
238	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);	308	MAGIC *mg = CORO_MAGIC (cv);
		309	AV *av;
239		310
240	if (SvTYPE (*he) != SVt_PVAV)	311	if (!mg)
241	{
242	SvREFCNT_dec (*he);
243	he = (SV )newAV ();
244	}	312	{
245		313	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
246	av_push ((AV )he, (SV *)CvPADLIST (cv));	314	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
247	}	315	mg->mg_virtual = &vtbl_coro;
248		316	mg->mg_obj = (SV *)newAV ();
249	#ifdef MAY_FLUSH
250	STATIC void
251	flush_padlist_cache ()
252	{
253	HV *hv = padlist_cache;
254	padlist_cache = newHV ();
255
256	if (hv_iterinit (hv))
257	{	317	}
258	HE *he;
259	AV *padlist;
260		318
261	while (!!(he = hv_iternext (hv)))	319	av = (AV *)mg->mg_obj;
262	{
263	AV av = (AV )HeVAL(he);
264		320
265	/* casting is fun. */	321	if (AvFILLp (av) >= AvMAX (av))
266	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	322	av_extend (av, AvMAX (av) + 1);
267	free_padlist (padlist);
268	}
269	}
270		323
271	SvREFCNT_dec (hv);	324	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
272	}	325	}
273	#endif	326
		327	/ load & save, init *****************************************************/
274		328
275	#define SB do {	329	#define SB do {
276	#define SE } while (0)	330	#define SE } while (0)
277		331
278	#define LOAD(state) load_state(aTHX_ (state));
279	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
280
281	#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
282		333
283	static void	334	static void
284	load_state(pTHX_ Coro__State c)	335	load_perl (Coro__State c)
285	{	336	{
286	PL_dowarn = c->dowarn;	337	#define VAR(name,type) PL_ ## name = c->name;
287	PL_in_eval = c->in_eval;	338	# include "state.h"
288		339	#undef VAR
289	PL_curstackinfo = c->curstackinfo;
290	PL_curstack = c->curstack;
291	PL_mainstack = c->mainstack;
292	PL_stack_sp = c->stack_sp;
293	PL_op = c->op;
294	PL_curpad = c->curpad;
295	PL_stack_base = c->stack_base;
296	PL_stack_max = c->stack_max;
297	PL_tmps_stack = c->tmps_stack;
298	PL_tmps_floor = c->tmps_floor;
299	PL_tmps_ix = c->tmps_ix;
300	PL_tmps_max = c->tmps_max;
301	PL_markstack = c->markstack;
302	PL_markstack_ptr = c->markstack_ptr;
303	PL_markstack_max = c->markstack_max;
304	PL_scopestack = c->scopestack;
305	PL_scopestack_ix = c->scopestack_ix;
306	PL_scopestack_max = c->scopestack_max;
307	PL_savestack = c->savestack;
308	PL_savestack_ix = c->savestack_ix;
309	PL_savestack_max = c->savestack_max;
310	PL_retstack = c->retstack;
311	PL_retstack_ix = c->retstack_ix;
312	PL_retstack_max = c->retstack_max;
313	PL_curcop = c->curcop;
314	PL_top_env = c->top_env;
315		340
316	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	341	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
317	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	342	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
318	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	}
319		355
320	{	356	{
321	dSP;	357	dSP;
322	CV *cv;	358	CV *cv;
323		359
324	/* now do the ugly restore mess */	360	/* now do the ugly restore mess */
325	while ((cv = (CV *)POPs))	361	while ((cv = (CV *)POPs))
326	{	362	{
327	AV padlist = (AV )POPs;
328
329	if (padlist)
330	{
331	put_padlist (cv); /* mark this padlist as available */	363	put_padlist (cv); /* mark this padlist as available */
332	CvPADLIST(cv) = padlist;	364	CvDEPTH (cv) = PTR2IV (POPs);
333	#ifdef USE_THREADS	365	CvPADLIST (cv) = (AV *)POPs;
334	/CvOWNER(cv) = (struct perl_thread )POPs;*/
335	#endif
336	}
337
338	++CvDEPTH(cv);
339	}	366	}
340		367
341	PUTBACK;	368	PUTBACK;
342	}	369	}
		370	assert (!PL_comppad \|\| AvARRAY (PL_comppad));//D
343	}	371	}
344		372
345	static void	373	static void
346	save_state(pTHX_ Coro__State c, int flags)	374	save_perl (Coro__State c)
347	{	375	{
		376	assert (!PL_comppad \|\| AvARRAY (PL_comppad));//D
348	{	377	{
349	dSP;	378	dSP;
350	I32 cxix = cxstack_ix;	379	I32 cxix = cxstack_ix;
351	PERL_CONTEXT *ccstk = cxstack;	380	PERL_CONTEXT *ccstk = cxstack;
352	PERL_SI *top_si = PL_curstackinfo;	381	PERL_SI *top_si = PL_curstackinfo;
…		…
354	/*	383	/*
355	* 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
356	* (and reinitialize) all cv's in the whole callchain :(	385	* (and reinitialize) all cv's in the whole callchain :(
357	*/	386	*/
358		387
		388	EXTEND (SP, 3 + 1);
359	PUSHs (Nullsv);	389	PUSHs (Nullsv);
360	/* this loop was inspired by pp_caller */	390	/* this loop was inspired by pp_caller */
361	for (;;)	391	for (;;)
362	{	392	{
363	while (cxix >= 0)	393	while (cxix >= 0)
364	{	394	{
365	PERL_CONTEXT *cx = &ccstk[cxix--];	395	PERL_CONTEXT *cx = &ccstk[cxix--];
366		396
367	if (CxTYPE(cx) == CXt_SUB)	397	if (CxTYPE (cx) == CXt_SUB)
368	{	398	{
369	CV *cv = cx->blk_sub.cv;	399	CV *cv = cx->blk_sub.cv;
		400
370	if (CvDEPTH(cv))	401	if (CvDEPTH (cv))
371	{	402	{
372	#ifdef USE_THREADS
373	/XPUSHs ((SV )CvOWNER(cv));*/
374	/CvOWNER(cv) = 0;/
375	/error must unlock this cv etc.. etc.../
376	#endif
377	EXTEND (SP, CvDEPTH(cv)*2);	403	EXTEND (SP, 3);
378
379	while (--CvDEPTH(cv))
380	{
381	/* this tells the restore code to increment CvDEPTH */
382	PUSHs (Nullsv);
383	PUSHs ((SV *)cv);
384	}
385
386	PUSHs ((SV *)CvPADLIST(cv));	404	PUSHs ((SV *)CvPADLIST (cv));
		405	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
387	PUSHs ((SV *)cv);	406	PUSHs ((SV *)cv);
388		407
		408	CvDEPTH (cv) = 0;
389	get_padlist (cv); /* this is a monster */	409	get_padlist (cv);
390	}	410	}
391	}
392	else if (CxTYPE(cx) == CXt_FORMAT)
393	{
394	/* I never used formats, so how should I know how these are implemented? */
395	/* my bold guess is as a simple, plain sub... */
396	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
397	}	411	}
398	}	412	}
399		413
400	if (top_si->si_type == PERLSI_MAIN)	414	if (top_si->si_type == PERLSI_MAIN)
401	break;	415	break;
…		…
406	}	420	}
407		421
408	PUTBACK;	422	PUTBACK;
409	}	423	}
410		424
411	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;
412	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	426	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
413	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;
414		429
415	c->dowarn = PL_dowarn;	430	#define VAR(name,type)c->name = PL_ ## name;
416	c->in_eval = PL_in_eval;	431	# include "state.h"
417		432	#undef VAR
418	c->curstackinfo = PL_curstackinfo;
419	c->curstack = PL_curstack;
420	c->mainstack = PL_mainstack;
421	c->stack_sp = PL_stack_sp;
422	c->op = PL_op;
423	c->curpad = PL_curpad;
424	c->stack_base = PL_stack_base;
425	c->stack_max = PL_stack_max;
426	c->tmps_stack = PL_tmps_stack;
427	c->tmps_floor = PL_tmps_floor;
428	c->tmps_ix = PL_tmps_ix;
429	c->tmps_max = PL_tmps_max;
430	c->markstack = PL_markstack;
431	c->markstack_ptr = PL_markstack_ptr;
432	c->markstack_max = PL_markstack_max;
433	c->scopestack = PL_scopestack;
434	c->scopestack_ix = PL_scopestack_ix;
435	c->scopestack_max = PL_scopestack_max;
436	c->savestack = PL_savestack;
437	c->savestack_ix = PL_savestack_ix;
438	c->savestack_max = PL_savestack_max;
439	c->retstack = PL_retstack;
440	c->retstack_ix = PL_retstack_ix;
441	c->retstack_max = PL_retstack_max;
442	c->curcop = PL_curcop;
443	c->top_env = PL_top_env;
444	}	433	}
445		434
446	/*	435	/*
447	* allocate various perl stacks. This is an exact copy	436	* allocate various perl stacks. This is an exact copy
448	* of perl.c:init_stacks, except that it uses less memory	437	* of perl.c:init_stacks, except that it uses less memory
449	* on the assumption that coroutines do not usually need	438	* on the (sometimes correct) assumption that coroutines do
450	* a lot of stackspace.	439	* not usually need a lot of stackspace.
451	*/	440	*/
452	STATIC void	441	#if CORO_PREFER_PERL_FUNCTIONS
		442	# define coro_init_stacks init_stacks
		443	#else
		444	static void
453	coro_init_stacks (pTHX)	445	coro_init_stacks ()
454	{	446	{
455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	447	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
456	PL_curstackinfo->si_type = PERLSI_MAIN;	448	PL_curstackinfo->si_type = PERLSI_MAIN;
457	PL_curstack = PL_curstackinfo->si_stack;	449	PL_curstack = PL_curstackinfo->si_stack;
458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459		451
460	PL_stack_base = AvARRAY(PL_curstack);	452	PL_stack_base = AvARRAY(PL_curstack);
461	PL_stack_sp = PL_stack_base;	453	PL_stack_sp = PL_stack_base;
462	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463		455
464	New(50,PL_tmps_stack,96,SV*);	456	New(50,PL_tmps_stack,128,SV*);
465	PL_tmps_floor = -1;	457	PL_tmps_floor = -1;
466	PL_tmps_ix = -1;	458	PL_tmps_ix = -1;
467	PL_tmps_max = 96;	459	PL_tmps_max = 128;
468		460
469	New(54,PL_markstack,16,I32);	461	New(54,PL_markstack,32,I32);
470	PL_markstack_ptr = PL_markstack;	462	PL_markstack_ptr = PL_markstack;
471	PL_markstack_max = PL_markstack + 16;	463	PL_markstack_max = PL_markstack + 32;
472		464
		465	#ifdef SET_MARK_OFFSET
473	SET_MARK_OFFSET;	466	SET_MARK_OFFSET;
		467	#endif
474		468
475	New(54,PL_scopestack,16,I32);	469	New(54,PL_scopestack,32,I32);
476	PL_scopestack_ix = 0;	470	PL_scopestack_ix = 0;
477	PL_scopestack_max = 16;	471	PL_scopestack_max = 32;
478		472
479	New(54,PL_savestack,96,ANY);	473	New(54,PL_savestack,64,ANY);
480	PL_savestack_ix = 0;	474	PL_savestack_ix = 0;
481	PL_savestack_max = 96;	475	PL_savestack_max = 64;
482		476
		477	#if !PERL_VERSION_ATLEAST (5,9,0)
483	New(54,PL_retstack,8,OP*);	478	New(54,PL_retstack,16,OP*);
484	PL_retstack_ix = 0;	479	PL_retstack_ix = 0;
485	PL_retstack_max = 8;	480	PL_retstack_max = 16;
		481	#endif
486	}	482	}
		483	#endif
487		484
488	/*	485	/*
489	* destroy the stacks, the callchain etc...	486	* destroy the stacks, the callchain etc...
490	* still there is a memleak of 128 bytes...
491	*/	487	*/
492	STATIC void	488	static void
493	destroy_stacks(pTHX)	489	coro_destroy_stacks ()
494	{	490	{
495	if (!IN_DESTRUCT)	491	if (!IN_DESTRUCT)
496	{	492	{
497	/* is this ugly, I ask? */	493	/* restore all saved variables and stuff */
498	while (PL_scopestack_ix)	494	LEAVE_SCOPE (0);
499	LEAVE;	495	assert (PL_tmps_floor == -1);
500		496
501	/* sure it is, but more important: is it correct?? :/ */	497	/* free all temporaries */
502	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
503	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);
504	}	506	}
505		507
506	while (PL_curstackinfo->si_next)	508	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;	509	PL_curstackinfo = PL_curstackinfo->si_next;
508		510
509	while (PL_curstackinfo)	511	while (PL_curstackinfo)
510	{	512	{
511	PERL_SI *p = PL_curstackinfo->si_prev;	513	PERL_SI *p = PL_curstackinfo->si_prev;
512		514
513	{
514	dSP;
515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516	PUTBACK; /* possibly superfluous */
517	}
518
519	if (!IN_DESTRUCT)	515	if (!IN_DESTRUCT)
520	{
521	dounwind(-1);
522	SvREFCNT_dec(PL_curstackinfo->si_stack);	516	SvREFCNT_dec (PL_curstackinfo->si_stack);
523	}
524		517
525	Safefree(PL_curstackinfo->si_cxstack);	518	Safefree (PL_curstackinfo->si_cxstack);
526	Safefree(PL_curstackinfo);	519	Safefree (PL_curstackinfo);
527	PL_curstackinfo = p;	520	PL_curstackinfo = p;
528	}	521	}
529		522
530	Safefree(PL_tmps_stack);	523	Safefree (PL_tmps_stack);
531	Safefree(PL_markstack);	524	Safefree (PL_markstack);
532	Safefree(PL_scopestack);	525	Safefree (PL_scopestack);
533	Safefree(PL_savestack);	526	Safefree (PL_savestack);
		527	#if !PERL_VERSION_ATLEAST (5,9,0)
534	Safefree(PL_retstack);	528	Safefree (PL_retstack);
535	}
536
537	static void
538	allocate_stack (Coro__State ctx, int alloc)
539	{
540	coro_stack *stack;
541
542	New (0, stack, 1, coro_stack);
543
544	stack->refcnt = 1;
545	stack->usecnt = 1;
546	stack->gencnt = ctx->gencnt = 0;
547	if (alloc)
548	{
549	#if HAVE_MMAP
550	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
551	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
552	if (stack->sptr == (void *)-1)
553	#endif	529	#endif
554	{
555	/FIXME//D//* reasonable stack size! */
556	stack->ssize = -4096 * sizeof (long);
557	New (0, stack->sptr, 4096, long);
558	}
559	}
560	else
561	stack->sptr = 0;
562
563	ctx->stack = stack;
564	}	530	}
565		531
566	static void	532	/ coroutine stack handling **********************************************/
567	deallocate_stack (Coro__State ctx)
568	{
569	coro_stack *stack = ctx->stack;
570		533
571	ctx->stack = 0;
572
573	if (stack)
574	{
575	if (!--stack->refcnt)
576	{
577	#ifdef HAVE_MMAP
578	if (stack->ssize > 0 && stack->sptr)
579	munmap (stack->sptr, stack->ssize);
580	else
581	#else
582	Safefree (stack->sptr);
583	#endif
584	Safefree (stack);
585	}
586	else if (ctx->gencnt == stack->gencnt)
587	--stack->usecnt;
588	}
589	}
590
591	static void	534	static void
592	setup_coro (void *arg)	535	setup_coro (struct coro *coro)
593	{	536	{
594	/*	537	/*
595	* emulate part of the perl startup here.	538	* emulate part of the perl startup here.
596	*/	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	{
597	dSP;	587	dSP;
598	Coro__State ctx = (Coro__State)arg;	588	LOGOP myop;
599	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
600		589
601	coro_init_stacks (aTHX);	590	Zero (&myop, 1, LOGOP);
602	/PL_curcop = 0;/	591	myop.op_next = PL_op;
603	/PL_in_eval = PL_in_eval;/ /* inherit */	592	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
604	SvREFCNT_dec (GvAV (PL_defgv));
605	GvAV (PL_defgv) = ctx->args;
606		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);
607	SPAGAIN;	601	SPAGAIN;
608
609	if (ctx->stack)
610	{
611	ctx->cursp = 0;
612
613	PUSHMARK(SP);
614	PUTBACK;
615	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
616
617	if (SvTRUE (ERRSV))
618	croak (NULL);
619	else
620	croak ("FATAL: CCTXT coroutine returned!");
621	}
622	else
623	{
624	UNOP myop;
625
626	PL_op = (OP *)&myop;
627
628	Zero(&myop, 1, UNOP);
629	myop.op_next = Nullop;
630	myop.op_flags = OPf_WANT_VOID;
631
632	PUSHMARK(SP);
633	XPUSHs (sub_init);
634	/*
635	* the next line is slightly wrong, as PL_op->op_next
636	* is actually being executed so we skip the first op.
637	* that doesn't matter, though, since it is only
638	* pp_nextstate and we never return...
639	* ah yes, and I don't care anyways ;)
640	*/
641	PUTBACK;
642	PL_op = pp_entersub();
643	SPAGAIN;
644
645	ENTER; /* necessary e.g. for dounwind */
646	}
647	}	602	}
648		603
649	static void	604	static void
650	continue_coro (void *arg)	605	coro_run (void *arg)
651	{	606	{
		607	/* coro_run is the alternative tail of transfer(), so unlock here. */
		608	UNLOCK;
		609
652	/*	610	/*
653	* this is a _very_ stripped down perl interpreter ;)	611	* this is a _very_ stripped down perl interpreter ;)
654	*/	612	*/
655	Coro__State ctx = (Coro__State)arg;
656	JMPENV coro_start_env;
657
658	/* same as JMPENV_BOOTSTRAP */
659	Zero(&coro_start_env, 1, JMPENV);
660	coro_start_env.je_ret = -1;
661	coro_start_env.je_mustcatch = TRUE;
662	PL_top_env = &coro_start_env;	613	PL_top_env = &PL_start_env;
663		614
664	ctx->cursp = 0;	615	/* inject call to cctx_init */
665	PL_op = PL_op->op_next;	616	prepare_cctx ((coro_cctx *)arg);
666	CALLRUNOPS(aTHX);
667		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);
668	abort ();	623	abort ();
669	}	624	}
670		625
671	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 = ((CORO_STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_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 CORO_STACKGUARD
		644	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		645	# endif
		646	REGISTER_STACK (
		647	cctx,
		648	CORO_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 = -CORO_STACKSIZE * (long)sizeof (long);
		658	New (0, cctx->sptr, CORO_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 CORO_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
672	transfer(pTHX_ struct coro prev, struct coro next, int flags)	743	transfer (struct coro prev, struct coro next)
673	{	744	{
674	dSTACKLEVEL;	745	dSTACKLEVEL;
675	static struct coro *xnext;
676		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	}
677	if (prev != next)	753	else if (prev != next)
678	{	754	{
679	xnext = next;	755	coro_cctx *prev__cctx;
680		756
681	if (next->mainstack)	757	if (prev->flags & CF_NEW)
682	{	758	{
683	SAVE (prev, flags);	759	/* create a new empty context */
684	LOAD (next);	760	Newz (0, prev->cctx, 1, coro_cctx);
685		761	prev->cctx->inuse = 1;
686	/* mark this state as in-use */	762	prev->flags &= ~CF_NEW;
687	next->mainstack = 0;	763	prev->flags \|= CF_RUNNING;
688	next->tmps_ix = -2;
689
690	/* stacklevel changed? if yes, grab the stack for us! */
691	if (flags & TRANSFER_SAVE_CCTXT)
692	{
693	if (!prev->stack)
694	allocate_stack (prev, 0);
695	else if (prev->cursp != stacklevel
696	&& prev->stack->usecnt > 1)
697	{
698	prev->gencnt = ++prev->stack->gencnt;
699	prev->stack->usecnt = 1;
700	}
701
702	/* has our stack been invalidated? */
703	if (next->stack && next->stack->gencnt != next->gencnt)
704	{
705	deallocate_stack (next);
706	allocate_stack (next, 1);
707	coro_create (&(next->stack->cctx),
708	continue_coro, (void *)next,
709	next->stack->sptr, labs (next->stack->ssize));
710	}
711
712	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
713	/* don't add any code here */
714	}
715
716	}	764	}
717	else if (next->tmps_ix == -2)	765
718	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	}
719	else	792	else
720	{	793	{
721	SAVE (prev, -1); /* first get rid of the old state */	794	/* coroutine already started */
722		795	save_perl (prev);
723	if (flags & TRANSFER_SAVE_CCTXT)	796	load_perl (next);
724	{
725	if (!prev->stack)
726	allocate_stack (prev, 0);
727
728	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
729	{
730	setup_coro (next);
731
732	prev->stack->refcnt++;
733	prev->stack->usecnt++;
734	next->stack = prev->stack;
735	next->gencnt = prev->gencnt;
736	}
737	else
738	{
739	allocate_stack (next, 1);
740	coro_create (&(next->stack->cctx),
741	setup_coro, (void *)next,
742	next->stack->sptr, labs (next->stack->ssize));
743	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
744	/* don't add any code here */
745	}
746	}
747	else
748	setup_coro (next);
749	}	797	}
750		798
751	/*	799	prev__cctx = prev->cctx;
752	* xnext is now either prev or next, depending on wether	800
753	* we switched the c stack or not. that's why I use a global	801	/* possibly "free" the cctx */
754	* variable, that should become thread-specific at one point.	802	if (prev__cctx->idle_sp == STACKLEVEL)
755	*/	803	{
756	xnext->cursp = stacklevel;	804	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
757	}	805	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
758		806
759	if (coro_mortal)	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;
760	{	829	}
761	SvREFCNT_dec (coro_mortal);	830	}
762	coro_mortal = 0;	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)
763	}	850	{
764	}	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 */
765		859
766	#define SV_CORO(sv,func) \	860	if (coro->mainstack && coro->mainstack != main_mainstack)
767	do { \	861	{
768	if (SvROK (sv)) \	862	struct coro temp;
769	sv = SvRV (sv); \
770	\
771	if (SvTYPE(sv) == SVt_PVHV) \
772	{ \
773	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
774	\
775	if (!he) \
776	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
777	\
778	(sv) = SvRV (HeVAL(he)); \
779	} \
780	\
781	/* must also be changed inside Coro::Cont::yield */ \
782	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
783	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
784	\
785	} while(0)
786		863
787	#define SvSTATE(sv) (struct coro *)SvIV (sv)	864	assert (!(coro->flags & CF_RUNNING));
788		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;
		886	}
		887
789	static void	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	};
		923
		924	static struct coro *
		925	SvSTATE (SV *coro)
		926	{
		927	HV *stash;
		928	MAGIC *mg;
		929
		930	if (SvROK (coro))
		931	coro = SvRV (coro);
		932
		933	stash = SvSTASH (coro);
		934	if (stash != coro_stash && stash != coro_state_stash)
		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");
		939	}
		940
		941	mg = SvMAGIC (coro);
		942	assert (mg->mg_type == PERL_MAGIC_ext);
		943	return (struct coro *)mg->mg_ptr;
		944	}
		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
790	api_transfer(pTHX_ SV prev, SV next, int flags)	954	api_transfer (SV prev_sv, SV next_sv)
791	{	955	{
792	SV_CORO (prev, "Coro::transfer");	956	struct transfer_args ta;
793	SV_CORO (next, "Coro::transfer");
794		957
795	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	958	prepare_transfer (&ta, prev_sv, next_sv);
		959	TRANSFER (ta);
		960	}
		961
		962	static int
		963	api_save (SV *coro_sv, int new_save)
		964	{
		965	struct coro *coro = SvSTATE (coro_sv);
		966	int old_save = coro->save;
		967
		968	if (new_save >= 0)
		969	coro->save = new_save;
		970
		971	return old_save;
796	}	972	}
797		973
798	/ Coro ******************************************************************/	974	/ Coro ******************************************************************/
799		975
800	#define PRIO_MAX 3
801	#define PRIO_HIGH 1
802	#define PRIO_NORMAL 0
803	#define PRIO_LOW -1
804	#define PRIO_IDLE -3
805	#define PRIO_MIN -4
806
807	/* for Coro.pm */
808	static GV coro_current, coro_idle;
809	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
810	static int coro_nready;
811
812	static void	976	static void
813	coro_enq (SV *sv)	977	coro_enq (SV *coro_sv)
814	{	978	{
815	if (SvTYPE (sv) == SVt_PVHV)
816	{
817	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
818	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
819
820	prio = prio > PRIO_MAX ? PRIO_MAX
821	: prio < PRIO_MIN ? PRIO_MIN
822	: prio;
823
824	av_push (coro_ready [prio - PRIO_MIN], sv);	979	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
825	coro_nready++;
826
827	return;
828	}
829
830	croak ("Coro::ready tried to enqueue something that is not a coroutine");
831	}	980	}
832		981
833	static SV *	982	static SV *
834	coro_deq (int min_prio)	983	coro_deq (int min_prio)
835	{	984	{
…		…
838	min_prio -= PRIO_MIN;	987	min_prio -= PRIO_MIN;
839	if (min_prio < 0)	988	if (min_prio < 0)
840	min_prio = 0;	989	min_prio = 0;
841		990
842	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	991	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
843	if (av_len (coro_ready[prio]) >= 0)	992	if (AvFILLp (coro_ready [prio]) >= 0)
844	{
845	coro_nready--;
846	return av_shift (coro_ready[prio]);	993	return av_shift (coro_ready [prio]);
847	}
848		994
849	return 0;	995	return 0;
850	}	996	}
851		997
852	static void	998	static int
853	api_ready (SV *coro)	999	api_ready (SV *coro_sv)
854	{	1000	{
		1001	struct coro *coro;
		1002
855	if (SvROK (coro))	1003	if (SvROK (coro_sv))
856	coro = SvRV (coro);	1004	coro_sv = SvRV (coro_sv);
857		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;
858	coro_enq (SvREFCNT_inc (coro));	1014	coro_enq (SvREFCNT_inc (coro_sv));
		1015	++coro_nready;
		1016	UNLOCK;
		1017
		1018	return 1;
		1019	}
		1020
		1021	static int
		1022	api_is_ready (SV *coro_sv)
		1023	{
		1024	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1025	}
		1026
		1027	static void
		1028	prepare_schedule (struct transfer_args *ta)
		1029	{
		1030	SV prev_sv, next_sv;
		1031
		1032	for (;;)
		1033	{
		1034	LOCK;
		1035	next_sv = coro_deq (PRIO_MIN);
		1036
		1037	/* nothing to schedule: call the idle handler */
		1038	if (!next_sv)
		1039	{
		1040	dSP;
		1041	UNLOCK;
		1042
		1043	ENTER;
		1044	SAVETMPS;
		1045
		1046	PUSHMARK (SP);
		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;
		1061	SvREFCNT_dec (next_sv);
		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;
859	}	1104	}
860		1105
861	static void	1106	static void
862	api_schedule (void)	1107	api_schedule (void)
863	{	1108	{
864	SV prev, next;	1109	struct transfer_args ta;
865		1110
866	prev = SvRV (GvSV (coro_current));	1111	prepare_schedule (&ta);
867	next = coro_deq (PRIO_MIN);	1112	TRANSFER (ta);
868
869	if (!next)
870	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
871
872	/* free this only after the transfer */
873	coro_mortal = prev;
874	SV_CORO (prev, "Coro::schedule");
875
876	SvRV (GvSV (coro_current)) = next;
877
878	SV_CORO (next, "Coro::schedule");
879
880	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
881	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
882	}	1113	}
883		1114
884	static void	1115	static int
885	api_cede (void)	1116	api_cede (void)
886	{	1117	{
887	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1118	struct transfer_args ta;
888		1119
889	api_schedule ();	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;
890	}	1143	}
891		1144
892	MODULE = Coro::State PACKAGE = Coro::State	1145	MODULE = Coro::State PACKAGE = Coro::State
893		1146
894	PROTOTYPES: ENABLE	1147	PROTOTYPES: DISABLE
895		1148
896	BOOT:	1149	BOOT:
897	{ /* {} necessary for stoopid perl-5.6.x */	1150	{
898	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1151	#ifdef USE_ITHREADS
899	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1152	MUTEX_INIT (&coro_mutex);
		1153	#endif
		1154	BOOT_PAGESIZE;
		1155
900	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1156	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
901		1157
902	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1158	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
903	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1159	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
904	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));
905	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1162	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
906
907	if (!padlist_cache)
908	padlist_cache = newHV ();
909		1163
910	main_mainstack = PL_mainstack;	1164	main_mainstack = PL_mainstack;
911		1165
912	coroapi.ver = CORO_API_VERSION;	1166	coroapi.ver = CORO_API_VERSION;
913	coroapi.transfer = api_transfer;	1167	coroapi.transfer = api_transfer;
914	}
915		1168
916	Coro::State	1169	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
917	_newprocess(args)	1170	}
918	SV * args	1171
919	PROTOTYPE: $	1172	SV *
		1173	new (char *klass, ...)
920	CODE:	1174	CODE:
921	Coro__State coro;	1175	{
		1176	struct coro *coro;
		1177	HV *hv;
		1178	int i;
922		1179
923	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
924	croak ("Coro::State::_newprocess expects an arrayref");
925
926	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;
927		1184
928	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1185	hv = newHV ();
929	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;
930	coro->stack = 0;	1187	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
931		1188
932	RETVAL = coro;	1189	for (i = 1; i < items; i++)
		1190	av_push (coro->args, newSVsv (ST (i)));
		1191	}
933	OUTPUT:	1192	OUTPUT:
934	RETVAL	1193	RETVAL
935		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
936	void	1202	void
937	transfer(prev, next, flags)	1203	_set_stacklevel (...)
938	SV *prev	1204	ALIAS:
939	SV *next	1205	Coro::State::transfer = 1
940	int flags	1206	Coro::schedule = 2
941	PROTOTYPE: @	1207	Coro::cede = 3
		1208	Coro::cede_notself = 4
942	CODE:	1209	CODE:
943	PUTBACK;	1210	{
944	SV_CORO (next, "Coro::transfer");	1211	struct transfer_args ta;
945	SV_CORO (prev, "Coro::transfer");	1212
946	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1213	switch (ix)
947	SPAGAIN;	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
948		1255
949	void	1256	void
950	DESTROY(coro)
951	Coro::State coro
952	CODE:
953
954	if (coro->mainstack && coro->mainstack != main_mainstack)
955	{
956	struct coro temp;
957
958	PUTBACK;
959	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
960	LOAD(aTHX_ coro);
961	SPAGAIN;
962
963	destroy_stacks (aTHX);
964
965	LOAD((&temp)); /* this will get rid of defsv etc.. */
966	SPAGAIN;
967
968	coro->mainstack = 0;
969	}
970
971	deallocate_stack (coro);
972
973	Safefree (coro);
974
975	void
976	flush()
977	CODE:
978	#ifdef MAY_FLUSH
979	flush_padlist_cache ();
980	#endif
981
982	void
983	_exit(code)	1257	_exit (code)
984	int code	1258	int code
985	PROTOTYPE: $	1259	PROTOTYPE: $
986	CODE:	1260	CODE:
987	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
988	_exit (code);	1261	_exit (code);
989	#else
990	signal (SIGTERM, SIG_DFL);
991	raise (SIGTERM);
992	exit (code);
993	#endif
994		1262
995	MODULE = Coro::State PACKAGE = Coro::Cont	1263	int
		1264	cctx_count ()
		1265	CODE:
		1266	RETVAL = cctx_count;
		1267	OUTPUT:
		1268	RETVAL
996		1269
997	# this is slightly dirty (should expose a c-level api)	1270	int
998		1271	cctx_idle ()
999	void	1272	CODE:
1000	yield(...)	1273	RETVAL = cctx_idle;
1001	PROTOTYPE: @	1274	OUTPUT:
1002	CODE:	1275	RETVAL
1003	static SV *returnstk;
1004	SV *sv;
1005	AV *defav = GvAV (PL_defgv);
1006	struct coro prev, next;
1007
1008	if (!returnstk)
1009	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1010
1011	/* set up @_ -- ugly */
1012	av_clear (defav);
1013	av_fill (defav, items - 1);
1014	while (items--)
1015	av_store (defav, items, SvREFCNT_inc (ST(items)));
1016
1017	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1018	sv = av_pop ((AV *)SvRV (returnstk));
1019	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
1020	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
1021	SvREFCNT_dec (sv);
1022
1023	transfer(aTHX_ prev, next, 0);
1024		1276
1025	MODULE = Coro::State PACKAGE = Coro	1277	MODULE = Coro::State PACKAGE = Coro
1026		1278
1027	# this is slightly dirty (should expose a c-level api)
1028
1029	BOOT:	1279	BOOT:
1030	{	1280	{
1031	int i;	1281	int i;
		1282
1032	HV *stash = gv_stashpv ("Coro", TRUE);	1283	coro_stash = gv_stashpv ("Coro", TRUE);
1033		1284
1034	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1285	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1035	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1286	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1036	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1287	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1037	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1288	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1038	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1289	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1039	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1290	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1040		1291
1041	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1292	coro_current = get_sv ("Coro::current", FALSE);
1042	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1293	SvREADONLY_on (coro_current);
1043		1294
1044	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1295	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1045	coro_ready[i] = newAV ();	1296	coro_ready[i] = newAV ();
1046		1297
1047	{	1298	{
1048	SV *sv = perl_get_sv("Coro::API", 1);	1299	SV *sv = perl_get_sv("Coro::API", 1);
1049		1300
1050	coroapi.schedule = api_schedule;	1301	coroapi.schedule = api_schedule;
		1302	coroapi.save = api_save;
1051	coroapi.cede = api_cede;	1303	coroapi.cede = api_cede;
		1304	coroapi.cede_notself = api_cede_notself;
1052	coroapi.ready = api_ready;	1305	coroapi.ready = api_ready;
		1306	coroapi.is_ready = api_is_ready;
1053	coroapi.nready = &coro_nready;	1307	coroapi.nready = &coro_nready;
1054	coroapi.current = coro_current;	1308	coroapi.current = coro_current;
1055		1309
1056	GCoroAPI = &coroapi;	1310	GCoroAPI = &coroapi;
1057	sv_setiv(sv, (IV)&coroapi);	1311	sv_setiv (sv, (IV)&coroapi);
1058	SvREADONLY_on(sv);	1312	SvREADONLY_on (sv);
1059	}	1313	}
1060	}	1314	}
1061		1315
1062	void	1316	void
1063	ready(self)	1317	_set_current (SV *current)
1064	SV * self
1065	PROTOTYPE: $	1318	PROTOTYPE: $
1066	CODE:	1319	CODE:
1067	api_ready (self);	1320	SvREFCNT_dec (SvRV (coro_current));
		1321	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1068		1322
1069	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
1070	nready(...)	1362	nready (...)
1071	PROTOTYPE:	1363	PROTOTYPE:
1072	CODE:	1364	CODE:
1073	RETVAL = coro_nready;	1365	RETVAL = coro_nready;
1074	OUTPUT:	1366	OUTPUT:
1075	RETVAL	1367	RETVAL
1076		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
1077	void	1390	void
1078	schedule(...)	1391	_set_state (char *data_)
1079	PROTOTYPE:	1392	PROTOTYPE: $
1080	CODE:	1393	CODE:
1081	api_schedule ();	1394	{
		1395	struct io_state data = (void )data_;
1082		1396
1083	void	1397	errno = data->errorno;
1084	cede(...)	1398	PL_laststype = data->laststype;
1085	PROTOTYPE:	1399	PL_laststatval = data->laststatval;
1086	CODE:	1400	PL_statcache = data->statcache;
1087	api_cede ();	1401	}
1088		1402

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Comparing Coro/Coro/State.xs (file contents): Revision 1.41 by root, Tue Nov 27 02:51:03 2001 UTC vs. Revision 1.143 by root, Wed Feb 28 11:43:03 2007 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.41 by root, Tue Nov 27 02:51:03 2001 UTC vs.
Revision 1.143 by root, Wed Feb 28 11:43:03 2007 UTC