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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.53 by pcg, Sat Feb 14 12:39:41 2004 UTC vs.
Revision 1.147 by root, Mon Mar 19 15:50:48 2007 UTC

…		…
		1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "patchlevel.h"	9	#include "patchlevel.h"
6		10
7	#if PATCHLEVEL < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	\|\| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
8	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
10	# endif	57	# endif
11	# ifndef call_sv	58	# ifndef call_sv
12	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
23	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
25	# endif	72	# endif
26	#endif	73	#endif
27		74
28	#include "libcoro/coro.c"	75	/* 5.8.7 */
29		76	#ifndef SvRV_set
30	#include <signal.h>	77	# define SvRV_set(s,v) SvRV(s) = (v)
31
32	#ifdef HAVE_MMAP
33	# include <unistd.h>
34	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS
36	# ifdef MAP_ANON
37	# define MAP_ANONYMOUS MAP_ANON
38	# else
39	# undef HAVE_MMAP
40	# endif
41	# endif	78	#endif
42	#endif
43		79
44	#define SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
45	#define UCORO_STATE "_coro_state"	81	# undef CORO_STACKGUARD
		82	#endif
		83
		84	#ifndef CORO_STACKGUARD
		85	# define CORO_STACKGUARD 0
		86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
46		92
47	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macro should declare a variable stacklevel that contains and approximation
48	* to the current C stack pointer. Its property is that it changes with each call	94	* to the current C stack pointer. Its property is that it changes with each call
49	* and should be unique. */	95	* and should be unique. */
		96	#define dSTACKLEVEL int stacklevel
50	#define dSTACKLEVEL void *stacklevel = &stacklevel	97	#define STACKLEVEL ((void *)&stacklevel)
51		98
52	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
53		100
54	#define labs(l) ((l) >= 0 ? (l) : -(l))	101	#if __GNUC__ >= 3
		102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		104	#else
		105	# define attribute(x)
		106	# define BARRIER
		107	#endif
		108
		109	#define NOINLINE attribute ((noinline))
55		110
56	#include "CoroAPI.h"	111	#include "CoroAPI.h"
57		112
		113	#ifdef USE_ITHREADS
		114	static perl_mutex coro_mutex;
		115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		117	#else
		118	# define LOCK (void)0
		119	# define UNLOCK (void)0
		120	#endif
		121
		122	/* helper storage struct for Coro::AIO */
		123	struct io_state
		124	{
		125	int errorno;
		126	I32 laststype;
		127	int laststatval;
		128	Stat_t statcache;
		129	};
		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
58	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
		133	static AV main_mainstack; / used to differentiate between $main and others */
		134	static HV coro_state_stash, coro_stash;
		135	static SV coro_mortal; / will be freed after next transfer */
59		136
60	/* this is actually not only the c stack but also c registers etc... */	137	static struct coro_cctx *cctx_first;
		138	static int cctx_count, cctx_idle;
		139
		140	/* this is a structure representing a c-level coroutine */
61	typedef struct {	141	typedef struct coro_cctx {
62	int refcnt; /* pointer reference counter */	142	struct coro_cctx *next;
63	int usecnt; /* shared by how many coroutines */
64	int gencnt; /* generation counter */
65		143
		144	/* the stack */
		145	void *sptr;
		146	size_t ssize;
		147
		148	/* cpu state */
		149	void idle_sp; / sp of top-level transfer/schedule/cede call */
		150	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		151	JMPENV *top_env;
66	coro_context cctx;	152	coro_context cctx;
67		153
68	void *sptr;	154	#if CORO_USE_VALGRIND
69	long ssize; /* positive == mmap, otherwise malloc */	155	int valgrind_id;
70	} coro_stack;	156	#endif
		157	char inuse, mapped;
		158	} coro_cctx;
71		159
		160	enum {
		161	CF_RUNNING = 0x0001, /* coroutine is running */
		162	CF_READY = 0x0002, /* coroutine is ready */
		163	CF_NEW = 0x0004, /* has never been switched to */
		164	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		165	};
		166
		167	/* this is a structure representing a perl-level coroutine */
72	struct coro {	168	struct coro {
73	/* the top-level JMPENV for each coroutine, needed to catch dies. */	169	/* the c coroutine allocated to this perl coroutine, if any */
74	JMPENV start_env;	170	coro_cctx *cctx;
75
76	/* the optional C context */
77	coro_stack *stack;
78	void *cursp;
79	int gencnt;
80
81	/* optionally saved, might be zero */
82	AV *defav;
83	SV *defsv;
84	SV *errsv;
85
86	/* saved global state not related to stacks */
87	U8 dowarn;
88	I32 in_eval;
89
90	/* the stacks and related info (callchain etc..) */
91	PERL_SI *curstackinfo;
92	AV *curstack;
93	AV *mainstack;
94	SV **stack_sp;
95	OP *op;
96	SV **curpad;
97	AV *comppad;
98	SV **stack_base;
99	SV **stack_max;
100	SV **tmps_stack;
101	I32 tmps_floor;
102	I32 tmps_ix;
103	I32 tmps_max;
104	I32 *markstack;
105	I32 *markstack_ptr;
106	I32 *markstack_max;
107	I32 *scopestack;
108	I32 scopestack_ix;
109	I32 scopestack_max;
110	ANY *savestack;
111	I32 savestack_ix;
112	I32 savestack_max;
113	OP **retstack;
114	I32 retstack_ix;
115	I32 retstack_max;
116	COP *curcop;
117	JMPENV *top_env;
118		171
119	/* data associated with this coroutine (initial args) */	172	/* data associated with this coroutine (initial args) */
120	AV *args;	173	AV *args;
		174	int refcnt;
		175	int save; /* CORO_SAVE flags */
		176	int flags; /* CF_ flags */
		177
		178	/* optionally saved, might be zero */
		179	AV defav; / @_ */
		180	SV defsv; / $_ */
		181	SV errsv; / $@ */
		182	GV deffh; / default filehandle */
		183	SV irssv; / $/ */
		184	SV irssv_sv; / real $/ cache */
		185
		186	#define VAR(name,type) type name;
		187	# include "state.h"
		188	#undef VAR
		189
		190	/* coro process data */
		191	int prio;
121	};	192	};
122		193
123	typedef struct coro *Coro__State;	194	typedef struct coro *Coro__State;
124	typedef struct coro *Coro__State_or_hashref;	195	typedef struct coro *Coro__State_or_hashref;
125		196
126	static AV main_mainstack; / used to differentiate between $main and others */	197	/ Coro ******************************************************************/
127	static HV *coro_state_stash;
128	static SV *ucoro_state_sv;
129	static U32 ucoro_state_hash;
130	static HV *padlist_cache;
131	static SV coro_mortal; / will be freed after next transfer */
132		198
133	/* mostly copied from op.c:cv_clone2 */	199	#define PRIO_MAX 3
134	STATIC AV *	200	#define PRIO_HIGH 1
135	clone_padlist (AV *protopadlist)	201	#define PRIO_NORMAL 0
		202	#define PRIO_LOW -1
		203	#define PRIO_IDLE -3
		204	#define PRIO_MIN -4
		205
		206	/* for Coro.pm */
		207	static SV *coro_current;
		208	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		209	static int coro_nready;
		210
		211	/ lowlevel stuff ********************************************************/
		212
		213	static AV *
		214	coro_clone_padlist (pTHX_ CV *cv)
136	{	215	{
137	AV *av;	216	AV *padlist = CvPADLIST (cv);
138	I32 ix;
139	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
140	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
141	SV **pname = AvARRAY (protopad_name);
142	SV **ppad = AvARRAY (protopad);
143	I32 fname = AvFILLp (protopad_name);
144	I32 fpad = AvFILLp (protopad);
145	AV newpadlist, newpad_name, *newpad;	217	AV newpadlist, newpad;
146	SV **npad;
147
148	newpad_name = newAV ();
149	for (ix = fname; ix >= 0; ix--)
150	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
151
152	newpad = newAV ();
153	av_fill (newpad, AvFILLp (protopad));
154	npad = AvARRAY (newpad);
155		218
156	newpadlist = newAV ();	219	newpadlist = newAV ();
157	AvREAL_off (newpadlist);	220	AvREAL_off (newpadlist);
158	av_store (newpadlist, 0, (SV *) newpad_name);	221	#if PERL_VERSION_ATLEAST (5,9,0)
		222	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		223	#else
		224	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		225	#endif
		226	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		227	--AvFILLp (padlist);
		228
		229	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
159	av_store (newpadlist, 1, (SV *) newpad);	230	av_store (newpadlist, 1, (SV *)newpad);
160
161	av = newAV (); /* will be @_ */
162	av_extend (av, 0);
163	av_store (newpad, 0, (SV *) av);
164	AvFLAGS (av) = AVf_REIFY;
165
166	for (ix = fpad; ix > 0; ix--)
167	{
168	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
169	if (namesv && namesv != &PL_sv_undef)
170	{
171	char name = SvPVX (namesv); / XXX */
172	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')
173	{ /* lexical from outside? */
174	npad[ix] = SvREFCNT_inc (ppad[ix]);
175	}
176	else
177	{ /* our own lexical */
178	SV *sv;
179	if (*name == '&')
180	sv = SvREFCNT_inc (ppad[ix]);
181	else if (*name == '@')
182	sv = (SV *) newAV ();
183	else if (*name == '%')
184	sv = (SV *) newHV ();
185	else
186	sv = NEWSV (0, 0);
187	#ifdef SvPADBUSY
188	if (!SvPADBUSY (sv))
189	#endif
190	SvPADMY_on (sv);
191	npad[ix] = sv;
192	}
193	}
194	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
195	{
196	npad[ix] = SvREFCNT_inc (ppad[ix]);
197	}
198	else
199	{
200	SV *sv = NEWSV (0, 0);
201	SvPADTMP_on (sv);
202	npad[ix] = sv;
203	}
204	}
205
206	#if 0 /* return -ENOTUNDERSTOOD */
207	/* Now that vars are all in place, clone nested closures. */
208
209	for (ix = fpad; ix > 0; ix--) {
210	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
211	if (namesv
212	&& namesv != &PL_sv_undef
213	&& !(SvFLAGS(namesv) & SVf_FAKE)
214	&& *SvPVX(namesv) == '&'
215	&& CvCLONE(ppad[ix]))
216	{
217	CV kid = cv_clone((CV)ppad[ix]);
218	SvREFCNT_dec(ppad[ix]);
219	CvCLONE_on(kid);
220	SvPADMY_on(kid);
221	npad[ix] = (SV*)kid;
222	}
223	}
224	#endif
225		231
226	return newpadlist;	232	return newpadlist;
227	}	233	}
228		234
229	STATIC void	235	static void
230	free_padlist (AV *padlist)	236	free_padlist (pTHX_ AV *padlist)
231	{	237	{
232	/* may be during global destruction */	238	/* may be during global destruction */
233	if (SvREFCNT (padlist))	239	if (SvREFCNT (padlist))
234	{	240	{
235	I32 i = AvFILLp (padlist);	241	I32 i = AvFILLp (padlist);
…		…
248		254
249	SvREFCNT_dec ((SV*)padlist);	255	SvREFCNT_dec ((SV*)padlist);
250	}	256	}
251	}	257	}
252		258
253	STATIC int	259	static int
254	coro_cv_free (SV sv, MAGIC mg)	260	coro_cv_free (pTHX_ SV sv, MAGIC mg)
255	{	261	{
256	AV *padlist;	262	AV *padlist;
257	AV av = (AV )mg->mg_obj;	263	AV av = (AV )mg->mg_obj;
258		264
259	/* casting is fun. */	265	/* casting is fun. */
260	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	266	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
261	free_padlist (padlist);	267	free_padlist (aTHX_ padlist);
		268
		269	SvREFCNT_dec (av);
		270
		271	return 0;
262	}	272	}
263		273
264	#define PERL_MAGIC_coro PERL_MAGIC_ext	274	#define PERL_MAGIC_coro PERL_MAGIC_ext
265		275
266	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	276	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
267		277
		278	#define CORO_MAGIC(cv) \
		279	SvMAGIC (cv) \
		280	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		281	? SvMAGIC (cv) \
		282	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		283	: 0
		284
268	/* the next two functions merely cache the padlists */	285	/* the next two functions merely cache the padlists */
269	STATIC void	286	static void
270	get_padlist (CV *cv)	287	get_padlist (pTHX_ CV *cv)
271	{	288	{
272	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	289	MAGIC *mg = CORO_MAGIC (cv);
		290	AV *av;
273		291
274	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	292	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
275	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	293	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
276	else	294	else
		295	{
		296	#if CORO_PREFER_PERL_FUNCTIONS
		297	/* this is probably cleaner, but also slower? */
		298	CV *cp = Perl_cv_clone (cv);
		299	CvPADLIST (cv) = CvPADLIST (cp);
		300	CvPADLIST (cp) = 0;
		301	SvREFCNT_dec (cp);
		302	#else
277	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	303	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		304	#endif
		305	}
278	}	306	}
279		307
280	STATIC void	308	static void
281	put_padlist (CV *cv)	309	put_padlist (pTHX_ CV *cv)
282	{	310	{
283	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	311	MAGIC *mg = CORO_MAGIC (cv);
		312	AV *av;
284		313
285	if (!mg)	314	if (!mg)
286	{	315	{
287	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	316	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
288	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	317	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
289	mg->mg_virtual = &vtbl_coro;	318	mg->mg_virtual = &vtbl_coro;
290	mg->mg_obj = (SV *)newAV ();	319	mg->mg_obj = (SV *)newAV ();
291	}	320	}
292		321
293	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	322	av = (AV *)mg->mg_obj;
		323
		324	if (AvFILLp (av) >= AvMAX (av))
		325	av_extend (av, AvMAX (av) + 1);
		326
		327	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
294	}	328	}
		329
		330	/ load & save, init *****************************************************/
295		331
296	#define SB do {	332	#define SB do {
297	#define SE } while (0)	333	#define SE } while (0)
298		334
299	#define LOAD(state) load_state(aTHX_ (state));
300	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
301
302	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	335	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
303		336
304	static void	337	static void
305	load_state(pTHX_ Coro__State c)	338	load_perl (pTHX_ Coro__State c)
306	{	339	{
307	PL_dowarn = c->dowarn;	340	#define VAR(name,type) PL_ ## name = c->name;
308	PL_in_eval = c->in_eval;	341	# include "state.h"
309		342	#undef VAR
310	PL_curstackinfo = c->curstackinfo;
311	PL_curstack = c->curstack;
312	PL_mainstack = c->mainstack;
313	PL_stack_sp = c->stack_sp;
314	PL_op = c->op;
315	PL_curpad = c->curpad;
316	PL_comppad = c->comppad;
317	PL_stack_base = c->stack_base;
318	PL_stack_max = c->stack_max;
319	PL_tmps_stack = c->tmps_stack;
320	PL_tmps_floor = c->tmps_floor;
321	PL_tmps_ix = c->tmps_ix;
322	PL_tmps_max = c->tmps_max;
323	PL_markstack = c->markstack;
324	PL_markstack_ptr = c->markstack_ptr;
325	PL_markstack_max = c->markstack_max;
326	PL_scopestack = c->scopestack;
327	PL_scopestack_ix = c->scopestack_ix;
328	PL_scopestack_max = c->scopestack_max;
329	PL_savestack = c->savestack;
330	PL_savestack_ix = c->savestack_ix;
331	PL_savestack_max = c->savestack_max;
332	PL_retstack = c->retstack;
333	PL_retstack_ix = c->retstack_ix;
334	PL_retstack_max = c->retstack_max;
335	PL_curcop = c->curcop;
336	PL_top_env = c->top_env;
337		343
338	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
339	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
340	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	346	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		347	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		348
		349	if (c->irssv)
		350	{
		351	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
		352	{
		353	SvREFCNT_dec (c->irssv);
		354	c->irssv = 0;
		355	}
		356	else
		357	{
		358	REPLACE_SV (PL_rs, c->irssv);
		359	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		360	sv_setsv (c->irssv_sv, PL_rs);
		361	}
		362	}
341		363
342	{	364	{
343	dSP;	365	dSP;
344	CV *cv;	366	CV *cv;
345		367
346	/* now do the ugly restore mess */	368	/* now do the ugly restore mess */
347	while ((cv = (CV *)POPs))	369	while ((cv = (CV *)POPs))
348	{	370	{
349	AV padlist = (AV )POPs;
350
351	if (padlist)
352	{
353	put_padlist (cv); /* mark this padlist as available */	371	put_padlist (aTHX_ cv); /* mark this padlist as available */
354	CvPADLIST(cv) = padlist;	372	CvDEPTH (cv) = PTR2IV (POPs);
355	#ifdef USE_THREADS	373	CvPADLIST (cv) = (AV *)POPs;
356	/CvOWNER(cv) = (struct perl_thread )POPs;*/
357	#endif
358	}
359
360	++CvDEPTH(cv);
361	}	374	}
362		375
363	PUTBACK;	376	PUTBACK;
364	}	377	}
		378	assert (!PL_comppad \|\| AvARRAY (PL_comppad));//D
365	}	379	}
366		380
367	static void	381	static void
368	save_state(pTHX_ Coro__State c, int flags)	382	save_perl (pTHX_ Coro__State c)
369	{	383	{
		384	assert (!PL_comppad \|\| AvARRAY (PL_comppad));//D
370	{	385	{
371	dSP;	386	dSP;
372	I32 cxix = cxstack_ix;	387	I32 cxix = cxstack_ix;
373	PERL_CONTEXT *ccstk = cxstack;	388	PERL_CONTEXT *ccstk = cxstack;
374	PERL_SI *top_si = PL_curstackinfo;	389	PERL_SI *top_si = PL_curstackinfo;
…		…
376	/*	391	/*
377	* the worst thing you can imagine happens first - we have to save	392	* the worst thing you can imagine happens first - we have to save
378	* (and reinitialize) all cv's in the whole callchain :(	393	* (and reinitialize) all cv's in the whole callchain :(
379	*/	394	*/
380		395
		396	EXTEND (SP, 3 + 1);
381	PUSHs (Nullsv);	397	PUSHs (Nullsv);
382	/* this loop was inspired by pp_caller */	398	/* this loop was inspired by pp_caller */
383	for (;;)	399	for (;;)
384	{	400	{
385	while (cxix >= 0)	401	while (cxix >= 0)
386	{	402	{
387	PERL_CONTEXT *cx = &ccstk[cxix--];	403	PERL_CONTEXT *cx = &ccstk[cxix--];
388		404
389	if (CxTYPE(cx) == CXt_SUB)	405	if (CxTYPE (cx) == CXt_SUB)
390	{	406	{
391	CV *cv = cx->blk_sub.cv;	407	CV *cv = cx->blk_sub.cv;
		408
392	if (CvDEPTH(cv))	409	if (CvDEPTH (cv))
393	{	410	{
394	#ifdef USE_THREADS
395	/XPUSHs ((SV )CvOWNER(cv));*/
396	/CvOWNER(cv) = 0;/
397	/error must unlock this cv etc.. etc.../
398	#endif
399	EXTEND (SP, CvDEPTH(cv)*2);	411	EXTEND (SP, 3);
400
401	while (--CvDEPTH(cv))
402	{
403	/* this tells the restore code to increment CvDEPTH */
404	PUSHs (Nullsv);
405	PUSHs ((SV *)cv);
406	}
407
408	PUSHs ((SV *)CvPADLIST(cv));	412	PUSHs ((SV *)CvPADLIST (cv));
		413	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
409	PUSHs ((SV *)cv);	414	PUSHs ((SV *)cv);
410		415
411	get_padlist (cv); /* this is a monster */	416	CvDEPTH (cv) = 0;
		417	get_padlist (aTHX_ cv);
412	}	418	}
413	}	419	}
414	#ifdef CXt_FORMAT
415	else if (CxTYPE(cx) == CXt_FORMAT)
416	{
417	/* I never used formats, so how should I know how these are implemented? */
418	/* my bold guess is as a simple, plain sub... */
419	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
420	}
421	#endif
422	}	420	}
423		421
424	if (top_si->si_type == PERLSI_MAIN)	422	if (top_si->si_type == PERLSI_MAIN)
425	break;	423	break;
426		424
…		…
430	}	428	}
431		429
432	PUTBACK;	430	PUTBACK;
433	}	431	}
434		432
435	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	433	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
436	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	434	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
437	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	435	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		436	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		437	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
438		438
439	c->dowarn = PL_dowarn;	439	#define VAR(name,type)c->name = PL_ ## name;
440	c->in_eval = PL_in_eval;	440	# include "state.h"
441		441	#undef VAR
442	c->curstackinfo = PL_curstackinfo;
443	c->curstack = PL_curstack;
444	c->mainstack = PL_mainstack;
445	c->stack_sp = PL_stack_sp;
446	c->op = PL_op;
447	c->curpad = PL_curpad;
448	c->comppad = PL_comppad;
449	c->stack_base = PL_stack_base;
450	c->stack_max = PL_stack_max;
451	c->tmps_stack = PL_tmps_stack;
452	c->tmps_floor = PL_tmps_floor;
453	c->tmps_ix = PL_tmps_ix;
454	c->tmps_max = PL_tmps_max;
455	c->markstack = PL_markstack;
456	c->markstack_ptr = PL_markstack_ptr;
457	c->markstack_max = PL_markstack_max;
458	c->scopestack = PL_scopestack;
459	c->scopestack_ix = PL_scopestack_ix;
460	c->scopestack_max = PL_scopestack_max;
461	c->savestack = PL_savestack;
462	c->savestack_ix = PL_savestack_ix;
463	c->savestack_max = PL_savestack_max;
464	c->retstack = PL_retstack;
465	c->retstack_ix = PL_retstack_ix;
466	c->retstack_max = PL_retstack_max;
467	c->curcop = PL_curcop;
468	c->top_env = PL_top_env;
469	}	442	}
470		443
471	/*	444	/*
472	* allocate various perl stacks. This is an exact copy	445	* allocate various perl stacks. This is an exact copy
473	* of perl.c:init_stacks, except that it uses less memory	446	* of perl.c:init_stacks, except that it uses less memory
474	* on the (sometimes correct) assumption that coroutines do	447	* on the (sometimes correct) assumption that coroutines do
475	* not usually need a lot of stackspace.	448	* not usually need a lot of stackspace.
476	*/	449	*/
477	STATIC void	450	#if CORO_PREFER_PERL_FUNCTIONS
		451	# define coro_init_stacks init_stacks
		452	#else
		453	static void
478	coro_init_stacks (pTHX)	454	coro_init_stacks (pTHX)
479	{	455	{
480	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	456	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
481	PL_curstackinfo->si_type = PERLSI_MAIN;	457	PL_curstackinfo->si_type = PERLSI_MAIN;
482	PL_curstack = PL_curstackinfo->si_stack;	458	PL_curstack = PL_curstackinfo->si_stack;
483	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	459	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
484		460
485	PL_stack_base = AvARRAY(PL_curstack);	461	PL_stack_base = AvARRAY(PL_curstack);
486	PL_stack_sp = PL_stack_base;	462	PL_stack_sp = PL_stack_base;
487	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	463	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
488		464
489	New(50,PL_tmps_stack,96,SV*);	465	New(50,PL_tmps_stack,128,SV*);
490	PL_tmps_floor = -1;	466	PL_tmps_floor = -1;
491	PL_tmps_ix = -1;	467	PL_tmps_ix = -1;
492	PL_tmps_max = 96;	468	PL_tmps_max = 128;
493		469
494	New(54,PL_markstack,16,I32);	470	New(54,PL_markstack,32,I32);
495	PL_markstack_ptr = PL_markstack;	471	PL_markstack_ptr = PL_markstack;
496	PL_markstack_max = PL_markstack + 16;	472	PL_markstack_max = PL_markstack + 32;
497		473
498	#ifdef SET_MARK_OFFSET	474	#ifdef SET_MARK_OFFSET
499	SET_MARK_OFFSET;	475	SET_MARK_OFFSET;
500	#endif	476	#endif
501		477
502	New(54,PL_scopestack,16,I32);	478	New(54,PL_scopestack,32,I32);
503	PL_scopestack_ix = 0;	479	PL_scopestack_ix = 0;
504	PL_scopestack_max = 16;	480	PL_scopestack_max = 32;
505		481
506	New(54,PL_savestack,96,ANY);	482	New(54,PL_savestack,64,ANY);
507	PL_savestack_ix = 0;	483	PL_savestack_ix = 0;
508	PL_savestack_max = 96;	484	PL_savestack_max = 64;
509		485
		486	#if !PERL_VERSION_ATLEAST (5,9,0)
510	New(54,PL_retstack,8,OP*);	487	New(54,PL_retstack,16,OP*);
511	PL_retstack_ix = 0;	488	PL_retstack_ix = 0;
512	PL_retstack_max = 8;	489	PL_retstack_max = 16;
		490	#endif
513	}	491	}
		492	#endif
514		493
515	/*	494	/*
516	* destroy the stacks, the callchain etc...	495	* destroy the stacks, the callchain etc...
517	*/	496	*/
518	STATIC void	497	static void
519	destroy_stacks(pTHX)	498	coro_destroy_stacks (pTHX)
520	{	499	{
521	if (!IN_DESTRUCT)	500	if (!IN_DESTRUCT)
522	{	501	{
523	/* is this ugly, I ask? */	502	/* restore all saved variables and stuff */
524	LEAVE_SCOPE (0);	503	LEAVE_SCOPE (0);
		504	assert (PL_tmps_floor == -1);
525		505
526	/* sure it is, but more important: is it correct?? :/ */	506	/* free all temporaries */
527	FREETMPS;	507	FREETMPS;
		508	assert (PL_tmps_ix == -1);
		509
		510	/* unwind all extra stacks */
		511	POPSTACK_TO (PL_mainstack);
		512
		513	/* unwind main stack */
		514	dounwind (-1);
528	}	515	}
529		516
530	while (PL_curstackinfo->si_next)	517	while (PL_curstackinfo->si_next)
531	PL_curstackinfo = PL_curstackinfo->si_next;	518	PL_curstackinfo = PL_curstackinfo->si_next;
532		519
533	while (PL_curstackinfo)	520	while (PL_curstackinfo)
534	{	521	{
535	PERL_SI *p = PL_curstackinfo->si_prev;	522	PERL_SI *p = PL_curstackinfo->si_prev;
536		523
537	{
538	dSP;
539	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
540	PUTBACK; /* possibly superfluous */
541	}
542
543	if (!IN_DESTRUCT)	524	if (!IN_DESTRUCT)
544	{
545	dounwind(-1);
546	SvREFCNT_dec(PL_curstackinfo->si_stack);	525	SvREFCNT_dec (PL_curstackinfo->si_stack);
547	}
548		526
549	Safefree(PL_curstackinfo->si_cxstack);	527	Safefree (PL_curstackinfo->si_cxstack);
550	Safefree(PL_curstackinfo);	528	Safefree (PL_curstackinfo);
551	PL_curstackinfo = p;	529	PL_curstackinfo = p;
552	}	530	}
553		531
554	Safefree(PL_tmps_stack);	532	Safefree (PL_tmps_stack);
555	Safefree(PL_markstack);	533	Safefree (PL_markstack);
556	Safefree(PL_scopestack);	534	Safefree (PL_scopestack);
557	Safefree(PL_savestack);	535	Safefree (PL_savestack);
		536	#if !PERL_VERSION_ATLEAST (5,9,0)
558	Safefree(PL_retstack);	537	Safefree (PL_retstack);
559	}
560
561	static void
562	allocate_stack (Coro__State ctx, int alloc)
563	{
564	coro_stack *stack;
565
566	New (0, stack, 1, coro_stack);
567
568	stack->refcnt = 1;
569	stack->usecnt = 1;
570	stack->gencnt = ctx->gencnt = 0;
571	if (alloc)
572	{
573	#if HAVE_MMAP
574	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
575	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
576	if (stack->sptr == (void *)-1)
577	#endif	538	#endif
578	{
579	/FIXME//D//* reasonable stack size! */
580	stack->ssize = - (8192 * sizeof (long));
581	New (0, stack->sptr, 8192, long);
582	}
583	}
584	else
585	stack->sptr = 0;
586
587	ctx->stack = stack;
588	}	539	}
589		540
590	static void	541	/ coroutine stack handling **********************************************/
591	deallocate_stack (Coro__State ctx)
592	{
593	coro_stack *stack = ctx->stack;
594		542
595	ctx->stack = 0;
596
597	if (stack)
598	{
599	if (!--stack->refcnt)
600	{
601	#ifdef HAVE_MMAP
602	if (stack->ssize > 0 && stack->sptr)
603	munmap (stack->sptr, stack->ssize);
604	else
605	#endif
606	Safefree (stack->sptr);
607
608	Safefree (stack);
609	}
610	else if (ctx->gencnt == stack->gencnt)
611	--stack->usecnt;
612	}
613	}
614
615	static void	543	static void
616	setup_coro (void *arg)	544	setup_coro (pTHX_ struct coro *coro)
617	{	545	{
618	/*	546	/*
619	* emulate part of the perl startup here.	547	* emulate part of the perl startup here.
620	*/	548	*/
		549	coro_init_stacks (aTHX);
		550
		551	PL_curcop = &PL_compiling;
		552	PL_in_eval = EVAL_NULL;
		553	PL_comppad = 0;
		554	PL_curpm = 0;
		555	PL_localizing = 0;
		556	PL_dirty = 0;
		557	PL_restartop = 0;
		558
		559	{
		560	dSP;
		561	LOGOP myop;
		562
		563	SvREFCNT_dec (GvAV (PL_defgv));
		564	GvAV (PL_defgv) = coro->args; coro->args = 0;
		565
		566	Zero (&myop, 1, LOGOP);
		567	myop.op_next = Nullop;
		568	myop.op_flags = OPf_WANT_VOID;
		569
		570	PUSHMARK (SP);
		571	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		572	PUTBACK;
		573	PL_op = (OP *)&myop;
		574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		575	SPAGAIN;
		576	}
		577
		578	ENTER; /* necessary e.g. for dounwind */
		579	}
		580
		581	static void
		582	free_coro_mortal (pTHX)
		583	{
		584	if (coro_mortal)
		585	{
		586	SvREFCNT_dec (coro_mortal);
		587	coro_mortal = 0;
		588	}
		589	}
		590
		591	/* inject a fake call to Coro::State::_cctx_init into the execution */
		592	static void NOINLINE
		593	prepare_cctx (pTHX_ coro_cctx *cctx)
		594	{
621	dSP;	595	dSP;
622	Coro__State ctx = (Coro__State)arg;	596	LOGOP myop;
623	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
624		597
625	coro_init_stacks (aTHX);	598	Zero (&myop, 1, LOGOP);
626	/PL_curcop = 0;/	599	myop.op_next = PL_op;
627	/PL_in_eval = PL_in_eval;/ /* inherit */	600	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
628	SvREFCNT_dec (GvAV (PL_defgv));
629	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
630		601
		602	PUSHMARK (SP);
		603	EXTEND (SP, 2);
		604	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		605	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		606	PUTBACK;
		607	PL_op = (OP *)&myop;
		608	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
631	SPAGAIN;	609	SPAGAIN;
632
633	if (ctx->stack)
634	{
635	ctx->cursp = 0;
636
637	PUSHMARK(SP);
638	PUTBACK;
639	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
640
641	if (SvTRUE (ERRSV))
642	croak (NULL);
643	else
644	croak ("FATAL: CCTXT coroutine returned!");
645	}
646	else
647	{
648	UNOP myop;
649
650	PL_op = (OP *)&myop;
651
652	Zero(&myop, 1, UNOP);
653	myop.op_next = Nullop;
654	myop.op_flags = OPf_WANT_VOID;
655
656	PUSHMARK(SP);
657	XPUSHs (sub_init);
658	/*
659	* the next line is slightly wrong, as PL_op->op_next
660	* is actually being executed so we skip the first op.
661	* that doesn't matter, though, since it is only
662	* pp_nextstate and we never return...
663	* ah yes, and I don't care anyways ;)
664	*/
665	PUTBACK;
666	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
667	SPAGAIN;
668
669	ENTER; /* necessary e.g. for dounwind */
670	}
671	}	610	}
672		611
673	static void	612	static void
674	continue_coro (void *arg)	613	coro_run (void *arg)
675	{	614	{
		615	dTHX;
		616
		617	/* coro_run is the alternative tail of transfer(), so unlock here. */
		618	UNLOCK;
		619
676	/*	620	/*
677	* this is a _very_ stripped down perl interpreter ;)	621	* this is a _very_ stripped down perl interpreter ;)
678	*/	622	*/
679	Coro__State ctx = (Coro__State)arg;
680	JMPENV coro_start_env;
681
682	PL_top_env = &ctx->start_env;	623	PL_top_env = &PL_start_env;
683		624
684	ctx->cursp = 0;	625	/* inject call to cctx_init */
		626	prepare_cctx (aTHX_ (coro_cctx *)arg);
		627
		628	/* somebody will hit me for both perl_run and PL_restartop */
		629	PL_restartop = PL_op;
		630	perl_run (PL_curinterp);
		631
		632	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		633	abort ();
		634	}
		635
		636	static coro_cctx *
		637	cctx_new ()
		638	{
		639	coro_cctx *cctx;
		640	void *stack_start;
		641	size_t stack_size;
		642
		643	++cctx_count;
		644
		645	Newz (0, cctx, 1, coro_cctx);
		646
		647	#if HAVE_MMAP
		648
		649	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		650	/* mmap supposedly does allocate-on-write for us */
		651	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		652
		653	if (cctx->sptr != (void *)-1)
		654	{
		655	# if CORO_STACKGUARD
		656	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		657	# endif
		658	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		659	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		660	cctx->mapped = 1;
		661	}
		662	else
		663	#endif
		664	{
		665	cctx->ssize = coro_stacksize * (long)sizeof (long);
		666	New (0, cctx->sptr, coro_stacksize, long);
		667
		668	if (!cctx->sptr)
		669	{
		670	perror ("FATAL: unable to allocate stack for coroutine");
		671	_exit (EXIT_FAILURE);
		672	}
		673
		674	stack_start = cctx->sptr;
		675	stack_size = cctx->ssize;
		676	}
		677
		678	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		679	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		680
		681	return cctx;
		682	}
		683
		684	static void
		685	cctx_destroy (coro_cctx *cctx)
		686	{
		687	if (!cctx)
		688	return;
		689
		690	--cctx_count;
		691
		692	#if CORO_USE_VALGRIND
		693	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		694	#endif
		695
		696	#if HAVE_MMAP
		697	if (cctx->mapped)
		698	munmap (cctx->sptr, cctx->ssize);
		699	else
		700	#endif
		701	Safefree (cctx->sptr);
		702
		703	Safefree (cctx);
		704	}
		705
		706	static coro_cctx *
		707	cctx_get (pTHX)
		708	{
		709	while (cctx_first)
		710	{
		711	coro_cctx *cctx = cctx_first;
		712	cctx_first = cctx->next;
		713	--cctx_idle;
		714
		715	if (cctx->ssize >= coro_stacksize)
		716	return cctx;
		717
		718	cctx_destroy (cctx);
		719	}
		720
685	PL_op = PL_op->op_next;	721	PL_op = PL_op->op_next;
686	CALLRUNOPS(aTHX);	722	return cctx_new ();
687
688	abort ();
689	}	723	}
690		724
691	STATIC void	725	static void
		726	cctx_put (coro_cctx *cctx)
		727	{
		728	/* free another cctx if overlimit */
		729	if (cctx_idle >= MAX_IDLE_CCTX)
		730	{
		731	coro_cctx *first = cctx_first;
		732	cctx_first = first->next;
		733	--cctx_idle;
		734
		735	assert (!first->inuse);
		736	cctx_destroy (first);
		737	}
		738
		739	++cctx_idle;
		740	cctx->next = cctx_first;
		741	cctx_first = cctx;
		742	}
		743
		744	/ coroutine switching ***************************************************/
		745
		746	/* never call directly, always through the coro_state_transfer global variable */
		747	static void NOINLINE
692	transfer(pTHX_ struct coro prev, struct coro next, int flags)	748	transfer (pTHX_ struct coro prev, struct coro next)
693	{	749	{
694	dSTACKLEVEL;	750	dSTACKLEVEL;
695	static struct coro *xnext;
696		751
		752	/* sometimes transfer is only called to set idle_sp */
		753	if (!next)
		754	{
		755	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		756	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		757	}
697	if (prev != next)	758	else if (prev != next)
698	{	759	{
699	xnext = next;	760	coro_cctx *prev__cctx;
700		761
701	if (next->mainstack)	762	if (prev->flags & CF_NEW)
702	{	763	{
703	SAVE (prev, flags);	764	/* create a new empty context */
704	LOAD (next);	765	Newz (0, prev->cctx, 1, coro_cctx);
705		766	prev->cctx->inuse = 1;
706	/* mark this state as in-use */	767	prev->flags &= ~CF_NEW;
707	next->mainstack = 0;	768	prev->flags \|= CF_RUNNING;
708	next->tmps_ix = -2;
709
710	/* stacklevel changed? if yes, grab the stack for us! */
711	if (flags & TRANSFER_SAVE_CCTXT)
712	{
713	if (!prev->stack)
714	allocate_stack (prev, 0);
715	else if (prev->cursp != stacklevel
716	&& prev->stack->usecnt > 1)
717	{
718	prev->gencnt = ++prev->stack->gencnt;
719	prev->stack->usecnt = 1;
720	}
721
722	/* has our stack been invalidated? */
723	if (next->stack && next->stack->gencnt != next->gencnt)
724	{
725	deallocate_stack (next);
726	allocate_stack (next, 1);
727	coro_create (&(next->stack->cctx),
728	continue_coro, (void *)next,
729	next->stack->sptr, labs (next->stack->ssize));
730	}
731
732	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733	/* don't add any code here */
734	}
735
736	}	769	}
737	else if (next->tmps_ix == -2)	770
738	croak ("tried to transfer to running coroutine");	771	/TODO: must not croak here /
		772	if (!prev->flags & CF_RUNNING)
		773	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		774
		775	if (next->flags & CF_RUNNING)
		776	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		777
		778	if (next->flags & CF_DESTROYED)
		779	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		780
		781	prev->flags &= ~CF_RUNNING;
		782	next->flags \|= CF_RUNNING;
		783
		784	LOCK;
		785
		786	if (next->flags & CF_NEW)
		787	{
		788	/* need to start coroutine */
		789	next->flags &= ~CF_NEW;
		790	/* first get rid of the old state */
		791	save_perl (aTHX_ prev);
		792	/* setup coroutine call */
		793	setup_coro (aTHX_ next);
		794	/* need a new stack */
		795	assert (!next->cctx);
		796	}
739	else	797	else
740	{	798	{
741	SAVE (prev, -1); /* first get rid of the old state */	799	/* coroutine already started */
742		800	save_perl (aTHX_ prev);
743	if (flags & TRANSFER_SAVE_CCTXT)	801	load_perl (aTHX_ next);
744	{
745	if (!prev->stack)
746	allocate_stack (prev, 0);
747
748	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
749	{
750	PL_top_env = &next->start_env;
751
752	setup_coro (next);
753
754	prev->stack->refcnt++;
755	prev->stack->usecnt++;
756	next->stack = prev->stack;
757	next->gencnt = prev->gencnt;
758	}
759	else
760	{
761	assert (!next->stack);
762	allocate_stack (next, 1);
763	coro_create (&(next->stack->cctx),
764	setup_coro, (void *)next,
765	next->stack->sptr, labs (next->stack->ssize));
766	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
767	/* don't add any code here */
768	}
769	}
770	else
771	setup_coro (next);
772	}	802	}
773		803
774	/*	804	prev__cctx = prev->cctx;
775	* xnext is now either prev or next, depending on wether	805
776	* we switched the c stack or not. that's why I use a global	806	/* possibly "free" the cctx */
777	* variable, that should become thread-specific at one point.	807	if (prev__cctx->idle_sp == STACKLEVEL)
778	*/	808	{
779	xnext->cursp = stacklevel;	809	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
780	}	810	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
781		811
782	if (coro_mortal)	812	prev->cctx = 0;
		813
		814	cctx_put (prev__cctx);
		815	prev__cctx->inuse = 0;
		816	}
		817
		818	if (!next->cctx)
		819	{
		820	next->cctx = cctx_get (aTHX);
		821	assert (!next->cctx->inuse);
		822	next->cctx->inuse = 1;
		823	}
		824
		825	if (prev__cctx != next->cctx)
		826	{
		827	prev__cctx->top_env = PL_top_env;
		828	PL_top_env = next->cctx->top_env;
		829	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		830	}
		831
		832	free_coro_mortal (aTHX);
		833	UNLOCK;
783	{	834	}
784	SvREFCNT_dec (coro_mortal);	835	}
785	coro_mortal = 0;	836
		837	struct transfer_args
		838	{
		839	struct coro prev, next;
		840	};
		841
		842	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		843
		844	/ high level stuff ******************************************************/
		845
		846	static int
		847	coro_state_destroy (pTHX_ struct coro *coro)
		848	{
		849	if (coro->flags & CF_DESTROYED)
		850	return 0;
		851
		852	coro->flags \|= CF_DESTROYED;
		853
		854	if (coro->flags & CF_READY)
786	}	855	{
787	}	856	/* reduce nready, as destroying a ready coro effectively unreadies it */
		857	/* alternative: look through all ready queues and remove the coro */
		858	LOCK;
		859	--coro_nready;
		860	UNLOCK;
		861	}
		862	else
		863	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
788		864
789	#define SV_CORO(sv,func) \	865	if (coro->mainstack && coro->mainstack != main_mainstack)
790	do { \	866	{
791	if (SvROK (sv)) \	867	struct coro temp;
792	sv = SvRV (sv); \
793	\
794	if (SvTYPE(sv) == SVt_PVHV) \
795	{ \
796	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
797	\
798	if (!he) \
799	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
800	\
801	(sv) = SvRV (HeVAL(he)); \
802	} \
803	\
804	/* must also be changed inside Coro::Cont::yield */ \
805	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
806	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
807	\
808	} while(0)
809		868
810	#define SvSTATE(sv) (struct coro *)SvIV (sv)	869	assert (!(coro->flags & CF_RUNNING));
811		870
		871	Zero (&temp, 1, struct coro);
		872	temp.save = CORO_SAVE_DEF;
		873
		874	if (coro->flags & CF_RUNNING)
		875	croak ("FATAL: tried to destroy currently running coroutine");
		876
		877	save_perl (aTHX_ &temp);
		878	load_perl (aTHX_ coro);
		879
		880	coro_destroy_stacks (aTHX);
		881
		882	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		883
		884	coro->mainstack = 0;
		885	}
		886
		887	cctx_destroy (coro->cctx);
		888	SvREFCNT_dec (coro->args);
		889
		890	return 1;
		891	}
		892
812	static void	893	static int
		894	coro_state_free (pTHX_ SV sv, MAGIC mg)
		895	{
		896	struct coro coro = (struct coro )mg->mg_ptr;
		897	mg->mg_ptr = 0;
		898
		899	if (--coro->refcnt < 0)
		900	{
		901	coro_state_destroy (aTHX_ coro);
		902	Safefree (coro);
		903	}
		904
		905	return 0;
		906	}
		907
		908	static int
		909	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		910	{
		911	struct coro coro = (struct coro )mg->mg_ptr;
		912
		913	++coro->refcnt;
		914
		915	return 0;
		916	}
		917
		918	static MGVTBL coro_state_vtbl = {
		919	0, 0, 0, 0,
		920	coro_state_free,
		921	0,
		922	#ifdef MGf_DUP
		923	coro_state_dup,
		924	#else
		925	# define MGf_DUP 0
		926	#endif
		927	};
		928
		929	static struct coro *
		930	SvSTATE_ (pTHX_ SV *coro)
		931	{
		932	HV *stash;
		933	MAGIC *mg;
		934
		935	if (SvROK (coro))
		936	coro = SvRV (coro);
		937
		938	stash = SvSTASH (coro);
		939	if (stash != coro_stash && stash != coro_state_stash)
		940	{
		941	/* very slow, but rare, check */
		942	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		943	croak ("Coro::State object required");
		944	}
		945
		946	mg = CORO_MAGIC (coro);
		947	return (struct coro *)mg->mg_ptr;
		948	}
		949
		950	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		951
		952	static void
		953	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		954	{
		955	ta->prev = SvSTATE (prev_sv);
		956	ta->next = SvSTATE (next_sv);
		957	}
		958
		959	static void
813	api_transfer(pTHX_ SV prev, SV next, int flags)	960	api_transfer (SV prev_sv, SV next_sv)
814	{	961	{
815	SV_CORO (prev, "Coro::transfer");	962	dTHX;
816	SV_CORO (next, "Coro::transfer");	963	struct transfer_args ta;
817		964
818	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	965	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		966	TRANSFER (ta);
		967	}
		968
		969	static int
		970	api_save (SV *coro_sv, int new_save)
		971	{
		972	dTHX;
		973	struct coro *coro = SvSTATE (coro_sv);
		974	int old_save = coro->save;
		975
		976	if (new_save >= 0)
		977	coro->save = new_save;
		978
		979	return old_save;
819	}	980	}
820		981
821	/ Coro ******************************************************************/	982	/ Coro ******************************************************************/
822		983
823	#define PRIO_MAX 3
824	#define PRIO_HIGH 1
825	#define PRIO_NORMAL 0
826	#define PRIO_LOW -1
827	#define PRIO_IDLE -3
828	#define PRIO_MIN -4
829
830	/* for Coro.pm */
831	static GV coro_current, coro_idle;
832	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
833	static int coro_nready;
834
835	static void	984	static void
836	coro_enq (SV *sv)	985	coro_enq (pTHX_ SV *coro_sv)
837	{	986	{
838	if (SvTYPE (sv) == SVt_PVHV)
839	{
840	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
841	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
842
843	prio = prio > PRIO_MAX ? PRIO_MAX
844	: prio < PRIO_MIN ? PRIO_MIN
845	: prio;
846
847	av_push (coro_ready [prio - PRIO_MIN], sv);	987	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
848	coro_nready++;
849
850	return;
851	}
852
853	croak ("Coro::ready tried to enqueue something that is not a coroutine");
854	}	988	}
855		989
856	static SV *	990	static SV *
857	coro_deq (int min_prio)	991	coro_deq (pTHX_ int min_prio)
858	{	992	{
859	int prio = PRIO_MAX - PRIO_MIN;	993	int prio = PRIO_MAX - PRIO_MIN;
860		994
861	min_prio -= PRIO_MIN;	995	min_prio -= PRIO_MIN;
862	if (min_prio < 0)	996	if (min_prio < 0)
863	min_prio = 0;	997	min_prio = 0;
864		998
865	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	999	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
866	if (av_len (coro_ready[prio]) >= 0)	1000	if (AvFILLp (coro_ready [prio]) >= 0)
867	{
868	coro_nready--;
869	return av_shift (coro_ready[prio]);	1001	return av_shift (coro_ready [prio]);
870	}
871		1002
872	return 0;	1003	return 0;
873	}	1004	}
874		1005
875	static void	1006	static int
876	api_ready (SV *coro)	1007	api_ready (SV *coro_sv)
877	{	1008	{
		1009	dTHX;
		1010	struct coro *coro;
		1011
878	if (SvROK (coro))	1012	if (SvROK (coro_sv))
879	coro = SvRV (coro);	1013	coro_sv = SvRV (coro_sv);
880		1014
		1015	coro = SvSTATE (coro_sv);
		1016
		1017	if (coro->flags & CF_READY)
		1018	return 0;
		1019
		1020	coro->flags \|= CF_READY;
		1021
		1022	LOCK;
881	coro_enq (SvREFCNT_inc (coro));	1023	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1024	++coro_nready;
		1025	UNLOCK;
		1026
		1027	return 1;
		1028	}
		1029
		1030	static int
		1031	api_is_ready (SV *coro_sv)
		1032	{
		1033	dTHX;
		1034	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1035	}
		1036
		1037	static void
		1038	prepare_schedule (pTHX_ struct transfer_args *ta)
		1039	{
		1040	SV prev_sv, next_sv;
		1041
		1042	for (;;)
		1043	{
		1044	LOCK;
		1045	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1046
		1047	/* nothing to schedule: call the idle handler */
		1048	if (!next_sv)
		1049	{
		1050	dSP;
		1051	UNLOCK;
		1052
		1053	ENTER;
		1054	SAVETMPS;
		1055
		1056	PUSHMARK (SP);
		1057	PUTBACK;
		1058	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1059
		1060	FREETMPS;
		1061	LEAVE;
		1062	continue;
		1063	}
		1064
		1065	ta->next = SvSTATE (next_sv);
		1066
		1067	/* cannot transfer to destroyed coros, skip and look for next */
		1068	if (ta->next->flags & CF_DESTROYED)
		1069	{
		1070	UNLOCK;
		1071	SvREFCNT_dec (next_sv);
		1072	/* coro_nready is already taken care of by destroy */
		1073	continue;
		1074	}
		1075
		1076	--coro_nready;
		1077	UNLOCK;
		1078	break;
		1079	}
		1080
		1081	/* free this only after the transfer */
		1082	prev_sv = SvRV (coro_current);
		1083	SvRV_set (coro_current, next_sv);
		1084	ta->prev = SvSTATE (prev_sv);
		1085
		1086	assert (ta->next->flags & CF_READY);
		1087	ta->next->flags &= ~CF_READY;
		1088
		1089	LOCK;
		1090	free_coro_mortal (aTHX);
		1091	coro_mortal = prev_sv;
		1092	UNLOCK;
		1093	}
		1094
		1095	static void
		1096	prepare_cede (pTHX_ struct transfer_args *ta)
		1097	{
		1098	api_ready (coro_current);
		1099	prepare_schedule (aTHX_ ta);
		1100	}
		1101
		1102	static int
		1103	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1104	{
		1105	if (coro_nready)
		1106	{
		1107	SV *prev = SvRV (coro_current);
		1108	prepare_schedule (aTHX_ ta);
		1109	api_ready (prev);
		1110	return 1;
		1111	}
		1112	else
		1113	return 0;
882	}	1114	}
883		1115
884	static void	1116	static void
885	api_schedule (void)	1117	api_schedule (void)
886	{	1118	{
887	SV prev, next;	1119	dTHX;
		1120	struct transfer_args ta;
888		1121
889	prev = SvRV (GvSV (coro_current));	1122	prepare_schedule (aTHX_ &ta);
890	next = coro_deq (PRIO_MIN);	1123	TRANSFER (ta);
891
892	if (!next)
893	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
894
895	/* free this only after the transfer */
896	coro_mortal = prev;
897	SV_CORO (prev, "Coro::schedule");
898
899	SvRV (GvSV (coro_current)) = next;
900
901	SV_CORO (next, "Coro::schedule");
902
903	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
904	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
905	}	1124	}
906		1125
907	static void	1126	static int
908	api_cede (void)	1127	api_cede (void)
909	{	1128	{
910	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1129	dTHX;
		1130	struct transfer_args ta;
911		1131
912	api_schedule ();	1132	prepare_cede (aTHX_ &ta);
		1133
		1134	if (ta.prev != ta.next)
		1135	{
		1136	TRANSFER (ta);
		1137	return 1;
		1138	}
		1139	else
		1140	return 0;
		1141	}
		1142
		1143	static int
		1144	api_cede_notself (void)
		1145	{
		1146	dTHX;
		1147	struct transfer_args ta;
		1148
		1149	if (prepare_cede_notself (aTHX_ &ta))
		1150	{
		1151	TRANSFER (ta);
		1152	return 1;
		1153	}
		1154	else
		1155	return 0;
913	}	1156	}
914		1157
915	MODULE = Coro::State PACKAGE = Coro::State	1158	MODULE = Coro::State PACKAGE = Coro::State
916		1159
917	PROTOTYPES: ENABLE	1160	PROTOTYPES: DISABLE
918		1161
919	BOOT:	1162	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1163	{
921	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1164	#ifdef USE_ITHREADS
922	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1165	MUTEX_INIT (&coro_mutex);
		1166	#endif
		1167	BOOT_PAGESIZE;
		1168
923	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1169	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
924		1170
925	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1171	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
926	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1172	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
927	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1173	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1174	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1175	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
928	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1176	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
929		1177	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
930	if (!padlist_cache)
931	padlist_cache = newHV ();
932		1178
933	main_mainstack = PL_mainstack;	1179	main_mainstack = PL_mainstack;
934		1180
935	coroapi.ver = CORO_API_VERSION;	1181	coroapi.ver = CORO_API_VERSION;
936	coroapi.transfer = api_transfer;	1182	coroapi.transfer = api_transfer;
937	}
938		1183
939	Coro::State	1184	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
940	_newprocess(args)	1185	}
941	SV * args	1186
942	PROTOTYPE: $	1187	SV *
		1188	new (char *klass, ...)
943	CODE:	1189	CODE:
944	Coro__State coro;	1190	{
		1191	struct coro *coro;
		1192	HV *hv;
		1193	int i;
945		1194
946	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
947	croak ("Coro::State::_newprocess expects an arrayref");
948
949	Newz (0, coro, 1, struct coro);	1195	Newz (0, coro, 1, struct coro);
		1196	coro->args = newAV ();
		1197	coro->save = CORO_SAVE_DEF;
		1198	coro->flags = CF_NEW;
950		1199
951	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1200	hv = newHV ();
952	coro->mainstack = 0; /* actual work is done inside transfer */	1201	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
953	coro->stack = 0;	1202	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
954		1203
955	/* same as JMPENV_BOOTSTRAP */	1204	for (i = 1; i < items; i++)
956	/* we might be able to recycle start_env, but safe is safe */	1205	av_push (coro->args, newSVsv (ST (i)));
957	//Zero(&coro->start_env, 1, JMPENV);	1206	}
958	coro->start_env.je_ret = -1;
959	coro->start_env.je_mustcatch = TRUE;
960
961	RETVAL = coro;
962	OUTPUT:	1207	OUTPUT:
963	RETVAL	1208	RETVAL
964		1209
		1210	int
		1211	save (SV *coro, int new_save = -1)
		1212	CODE:
		1213	RETVAL = api_save (coro, new_save);
		1214	OUTPUT:
		1215	RETVAL
		1216
		1217	int
		1218	save_also (SV *coro_sv, int save_also)
		1219	CODE:
		1220	{
		1221	struct coro *coro = SvSTATE (coro_sv);
		1222	RETVAL = coro->save;
		1223	coro->save \|= save_also;
		1224	}
		1225	OUTPUT:
		1226	RETVAL
		1227
965	void	1228	void
966	transfer(prev, next, flags)	1229	_set_stacklevel (...)
967	SV *prev	1230	ALIAS:
968	SV *next	1231	Coro::State::transfer = 1
969	int flags	1232	Coro::schedule = 2
970	PROTOTYPE: @	1233	Coro::cede = 3
		1234	Coro::cede_notself = 4
971	CODE:	1235	CODE:
972	PUTBACK;	1236	{
973	SV_CORO (next, "Coro::transfer");	1237	struct transfer_args ta;
974	SV_CORO (prev, "Coro::transfer");	1238
975	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1239	switch (ix)
976	SPAGAIN;	1240	{
		1241	case 0:
		1242	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1243	ta.next = 0;
		1244	break;
		1245
		1246	case 1:
		1247	if (items != 2)
		1248	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1249
		1250	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1251	break;
		1252
		1253	case 2:
		1254	prepare_schedule (aTHX_ &ta);
		1255	break;
		1256
		1257	case 3:
		1258	prepare_cede (aTHX_ &ta);
		1259	break;
		1260
		1261	case 4:
		1262	if (!prepare_cede_notself (aTHX_ &ta))
		1263	XSRETURN_EMPTY;
		1264
		1265	break;
		1266	}
		1267
		1268	BARRIER;
		1269	TRANSFER (ta);
		1270
		1271	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1272	XSRETURN_YES;
		1273	}
		1274
		1275	bool
		1276	_destroy (SV *coro_sv)
		1277	CODE:
		1278	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1279	OUTPUT:
		1280	RETVAL
977		1281
978	void	1282	void
979	DESTROY(coro)
980	Coro::State coro
981	CODE:
982
983	if (coro->mainstack && coro->mainstack != main_mainstack)
984	{
985	struct coro temp;
986
987	PUTBACK;
988	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
989	LOAD(aTHX_ coro);
990	SPAGAIN;
991
992	destroy_stacks (aTHX);
993
994	LOAD((&temp)); /* this will get rid of defsv etc.. */
995	SPAGAIN;
996
997	coro->mainstack = 0;
998	}
999
1000	deallocate_stack (coro);
1001	SvREFCNT_dec (coro->args);
1002	Safefree (coro);
1003
1004	void
1005	_exit(code)	1283	_exit (code)
1006	int code	1284	int code
1007	PROTOTYPE: $	1285	PROTOTYPE: $
1008	CODE:	1286	CODE:
1009	_exit (code);	1287	_exit (code);
1010		1288
1011	MODULE = Coro::State PACKAGE = Coro::Cont	1289	int
		1290	cctx_stacksize (int new_stacksize = 0)
		1291	CODE:
		1292	RETVAL = coro_stacksize;
		1293	if (new_stacksize)
		1294	coro_stacksize = new_stacksize;
		1295	OUTPUT:
		1296	RETVAL
1012		1297
1013	# this is slightly dirty (should expose a c-level api)	1298	int
		1299	cctx_count ()
		1300	CODE:
		1301	RETVAL = cctx_count;
		1302	OUTPUT:
		1303	RETVAL
1014		1304
1015	void	1305	int
1016	yield(...)	1306	cctx_idle ()
1017	PROTOTYPE: @	1307	CODE:
1018	CODE:	1308	RETVAL = cctx_idle;
1019	static SV *returnstk;	1309	OUTPUT:
1020	SV *sv;	1310	RETVAL
1021	AV *defav = GvAV (PL_defgv);
1022	struct coro prev, next;
1023
1024	if (!returnstk)
1025	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1026
1027	/* set up @_ -- ugly */
1028	av_clear (defav);
1029	av_fill (defav, items - 1);
1030	while (items--)
1031	av_store (defav, items, SvREFCNT_inc (ST(items)));
1032
1033	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1034	sv = av_pop ((AV *)SvRV (returnstk));
1035	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
1036	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
1037	SvREFCNT_dec (sv);
1038
1039	transfer(aTHX_ prev, next, 0);
1040		1311
1041	MODULE = Coro::State PACKAGE = Coro	1312	MODULE = Coro::State PACKAGE = Coro
1042		1313
1043	# this is slightly dirty (should expose a c-level api)
1044
1045	BOOT:	1314	BOOT:
1046	{	1315	{
1047	int i;	1316	int i;
		1317
1048	HV *stash = gv_stashpv ("Coro", TRUE);	1318	coro_stash = gv_stashpv ("Coro", TRUE);
1049		1319
1050	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1320	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1051	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1321	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1052	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1322	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1053	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1323	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1054	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1324	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1055	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1325	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1056		1326
1057	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1327	coro_current = get_sv ("Coro::current", FALSE);
1058	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1328	SvREADONLY_on (coro_current);
1059		1329
1060	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1330	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1061	coro_ready[i] = newAV ();	1331	coro_ready[i] = newAV ();
1062		1332
1063	{	1333	{
1064	SV *sv = perl_get_sv("Coro::API", 1);	1334	SV *sv = perl_get_sv("Coro::API", 1);
1065		1335
1066	coroapi.schedule = api_schedule;	1336	coroapi.schedule = api_schedule;
		1337	coroapi.save = api_save;
1067	coroapi.cede = api_cede;	1338	coroapi.cede = api_cede;
		1339	coroapi.cede_notself = api_cede_notself;
1068	coroapi.ready = api_ready;	1340	coroapi.ready = api_ready;
		1341	coroapi.is_ready = api_is_ready;
1069	coroapi.nready = &coro_nready;	1342	coroapi.nready = &coro_nready;
1070	coroapi.current = coro_current;	1343	coroapi.current = coro_current;
1071		1344
1072	GCoroAPI = &coroapi;	1345	GCoroAPI = &coroapi;
1073	sv_setiv(sv, (IV)&coroapi);	1346	sv_setiv (sv, (IV)&coroapi);
1074	SvREADONLY_on(sv);	1347	SvREADONLY_on (sv);
1075	}	1348	}
1076	}	1349	}
1077		1350
1078	#if !PERL_MICRO
1079
1080	void	1351	void
1081	ready(self)	1352	_set_current (SV *current)
1082	SV * self
1083	PROTOTYPE: $	1353	PROTOTYPE: $
1084	CODE:	1354	CODE:
1085	api_ready (self);	1355	SvREFCNT_dec (SvRV (coro_current));
1086		1356	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1087	#endif
1088		1357
1089	int	1358	int
		1359	prio (Coro::State coro, int newprio = 0)
		1360	ALIAS:
		1361	nice = 1
		1362	CODE:
		1363	{
		1364	RETVAL = coro->prio;
		1365
		1366	if (items > 1)
		1367	{
		1368	if (ix)
		1369	newprio = coro->prio - newprio;
		1370
		1371	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1372	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1373
		1374	coro->prio = newprio;
		1375	}
		1376	}
		1377	OUTPUT:
		1378	RETVAL
		1379
		1380	SV *
		1381	ready (SV *self)
		1382	PROTOTYPE: $
		1383	CODE:
		1384	RETVAL = boolSV (api_ready (self));
		1385	OUTPUT:
		1386	RETVAL
		1387
		1388	SV *
		1389	is_ready (SV *self)
		1390	PROTOTYPE: $
		1391	CODE:
		1392	RETVAL = boolSV (api_is_ready (self));
		1393	OUTPUT:
		1394	RETVAL
		1395
		1396	int
1090	nready(...)	1397	nready (...)
1091	PROTOTYPE:	1398	PROTOTYPE:
1092	CODE:	1399	CODE:
1093	RETVAL = coro_nready;	1400	RETVAL = coro_nready;
1094	OUTPUT:	1401	OUTPUT:
1095	RETVAL	1402	RETVAL
1096		1403
		1404	MODULE = Coro::State PACKAGE = Coro::AIO
		1405
		1406	SV *
		1407	_get_state ()
		1408	CODE:
		1409	{
		1410	struct io_state *data;
		1411
		1412	RETVAL = newSV (sizeof (struct io_state));
		1413	data = (struct io_state *)SvPVX (RETVAL);
		1414	SvCUR_set (RETVAL, sizeof (struct io_state));
		1415	SvPOK_only (RETVAL);
		1416
		1417	data->errorno = errno;
		1418	data->laststype = PL_laststype;
		1419	data->laststatval = PL_laststatval;
		1420	data->statcache = PL_statcache;
		1421	}
		1422	OUTPUT:
		1423	RETVAL
		1424
1097	void	1425	void
1098	schedule(...)	1426	_set_state (char *data_)
1099	PROTOTYPE:	1427	PROTOTYPE: $
1100	CODE:	1428	CODE:
1101	api_schedule ();	1429	{
		1430	struct io_state data = (void )data_;
1102		1431
1103	void	1432	errno = data->errorno;
1104	cede(...)	1433	PL_laststype = data->laststype;
1105	PROTOTYPE:	1434	PL_laststatval = data->laststatval;
1106	CODE:	1435	PL_statcache = data->statcache;
1107	api_cede ();	1436	}
1108		1437

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Comparing Coro/Coro/State.xs (file contents): Revision 1.53 by pcg, Sat Feb 14 12:39:41 2004 UTC vs. Revision 1.147 by root, Mon Mar 19 15:50:48 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.53 by pcg, Sat Feb 14 12:39:41 2004 UTC vs.
Revision 1.147 by root, Mon Mar 19 15:50:48 2007 UTC