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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.62 by root, Tue Feb 22 19:51:58 2005 UTC vs.
Revision 1.146 by root, Sat Mar 17 19:51:57 2007 UTC

…		…
		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#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)
10	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
12	# endif	57	# endif
13	# ifndef call_sv	58	# ifndef call_sv
14	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
25	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
27	# endif	72	# endif
28	#endif	73	#endif
29		74
30	#include "libcoro/coro.c"	75	/* 5.8.7 */
31		76	#ifndef SvRV_set
32	#include <signal.h>	77	# define SvRV_set(s,v) SvRV(s) = (v)
33
34	#ifdef HAVE_MMAP
35	# include <unistd.h>
36	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS
38	# ifdef MAP_ANON
39	# define MAP_ANONYMOUS MAP_ANON
40	# else
41	# undef HAVE_MMAP
42	# endif
43	# endif	78	#endif
44	#endif
45		79
46	#define SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	#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
48		92
49	/* 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
50	* 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
51	* and should be unique. */	95	* and should be unique. */
		96	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	97	#define STACKLEVEL ((void *)&stacklevel)
53		98
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		100
56	#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))
57		110
58	#include "CoroAPI.h"	111	#include "CoroAPI.h"
59		112
60	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	117	#else
65	# define LOCK 0	118	# define LOCK (void)0
66	# define UNLOCK 0	119	# define UNLOCK (void)0
67	#endif	120	#endif
68		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;
69	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
70	static AV main_mainstack; / used to differentiate between $main and others */	133	static AV main_mainstack; / used to differentiate between $main and others */
71	static HV *coro_state_stash;	134	static HV coro_state_stash, coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV coro_mortal; / will be freed after next transfer */	135	static SV coro_mortal; / will be freed after next transfer */
75		136
76	/* 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 */
77	typedef struct {	141	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	142	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		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;
82	coro_context cctx;	152	coro_context cctx;
83		153
84	void *sptr;	154	#if CORO_USE_VALGRIND
85	long ssize; /* positive == mmap, otherwise malloc */	155	int valgrind_id;
86	} coro_stack;	156	#endif
		157	char inuse, mapped;
		158	} coro_cctx;
87		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 */
88	struct coro {	168	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	169	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	170	coro_cctx *cctx;
91
92	/* the optional C context */
93	coro_stack *stack;
94	void *cursp;
95	int gencnt;
96
97	/* optionally saved, might be zero */
98	AV *defav;
99	SV *defsv;
100	SV *errsv;
101
102	/* saved global state not related to stacks */
103	U8 dowarn;
104	I32 in_eval;
105
106	/* the stacks and related info (callchain etc..) */
107	PERL_SI *curstackinfo;
108	AV *curstack;
109	AV *mainstack;
110	SV **stack_sp;
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	CV *compcv;
115	SV **stack_base;
116	SV **stack_max;
117	SV **tmps_stack;
118	I32 tmps_floor;
119	I32 tmps_ix;
120	I32 tmps_max;
121	I32 *markstack;
122	I32 *markstack_ptr;
123	I32 *markstack_max;
124	I32 *scopestack;
125	I32 scopestack_ix;
126	I32 scopestack_max;
127	ANY *savestack;
128	I32 savestack_ix;
129	I32 savestack_max;
130	OP **retstack;
131	I32 retstack_ix;
132	I32 retstack_max;
133	COP *curcop;
134	JMPENV *top_env;
135		171
136	/* data associated with this coroutine (initial args) */	172	/* data associated with this coroutine (initial args) */
137	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	SV irssv; / $/ */
		183	SV irssv_sv; / real $/ cache */
		184
		185	#define VAR(name,type) type name;
		186	# include "state.h"
		187	#undef VAR
		188
		189	/* coro process data */
		190	int prio;
138	};	191	};
139		192
140	typedef struct coro *Coro__State;	193	typedef struct coro *Coro__State;
141	typedef struct coro *Coro__State_or_hashref;	194	typedef struct coro *Coro__State_or_hashref;
142		195
143	/* mostly copied from op.c:cv_clone2 */	196	/ Coro ******************************************************************/
144	STATIC AV *	197
145	clone_padlist (pTHX_ AV *protopadlist)	198	#define PRIO_MAX 3
		199	#define PRIO_HIGH 1
		200	#define PRIO_NORMAL 0
		201	#define PRIO_LOW -1
		202	#define PRIO_IDLE -3
		203	#define PRIO_MIN -4
		204
		205	/* for Coro.pm */
		206	static SV *coro_current;
		207	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		208	static int coro_nready;
		209
		210	/ lowlevel stuff ********************************************************/
		211
		212	static AV *
		213	coro_clone_padlist (pTHX_ CV *cv)
146	{	214	{
147	AV *av;	215	AV *padlist = CvPADLIST (cv);
148	I32 ix;
149	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
150	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
151	SV **pname = AvARRAY (protopad_name);
152	SV **ppad = AvARRAY (protopad);
153	I32 fname = AvFILLp (protopad_name);
154	I32 fpad = AvFILLp (protopad);
155	AV newpadlist, newpad_name, *newpad;	216	AV newpadlist, newpad;
156	SV **npad;
157
158	newpad_name = newAV ();
159	for (ix = fname; ix >= 0; ix--)
160	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
161
162	newpad = newAV ();
163	av_fill (newpad, AvFILLp (protopad));
164	npad = AvARRAY (newpad);
165		217
166	newpadlist = newAV ();	218	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	219	AvREAL_off (newpadlist);
168	av_store (newpadlist, 0, (SV *) newpad_name);	220	#if PERL_VERSION_ATLEAST (5,9,0)
		221	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		222	#else
		223	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		224	#endif
		225	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		226	--AvFILLp (padlist);
		227
		228	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
169	av_store (newpadlist, 1, (SV *) newpad);	229	av_store (newpadlist, 1, (SV *)newpad);
170
171	av = newAV (); /* will be @_ */
172	av_extend (av, 0);
173	av_store (newpad, 0, (SV *) av);
174	AvFLAGS (av) = AVf_REIFY;
175
176	for (ix = fpad; ix > 0; ix--)
177	{
178	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
179
180	if (namesv && namesv != &PL_sv_undef)
181	{
182	char name = SvPVX (namesv); / XXX */
183
184	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')
185	{ /* lexical from outside? */
186	npad[ix] = SvREFCNT_inc (ppad[ix]);
187	}
188	else
189	{ /* our own lexical */
190	SV *sv;
191	if (*name == '&')
192	sv = SvREFCNT_inc (ppad[ix]);
193	else if (*name == '@')
194	sv = (SV *) newAV ();
195	else if (*name == '%')
196	sv = (SV *) newHV ();
197	else
198	sv = NEWSV (0, 0);
199
200	#ifdef SvPADBUSY
201	if (!SvPADBUSY (sv))
202	#endif
203	SvPADMY_on (sv);
204
205	npad[ix] = sv;
206	}
207	}
208	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
209	{
210	npad[ix] = SvREFCNT_inc (ppad[ix]);
211	}
212	else
213	{
214	SV *sv = NEWSV (0, 0);
215	SvPADTMP_on (sv);
216	npad[ix] = sv;
217	}
218	}
219
220	#if 0 /* return -ENOTUNDERSTOOD */
221	/* Now that vars are all in place, clone nested closures. */
222
223	for (ix = fpad; ix > 0; ix--) {
224	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
225	if (namesv
226	&& namesv != &PL_sv_undef
227	&& !(SvFLAGS(namesv) & SVf_FAKE)
228	&& *SvPVX(namesv) == '&'
229	&& CvCLONE(ppad[ix]))
230	{
231	CV kid = cv_clone((CV)ppad[ix]);
232	SvREFCNT_dec(ppad[ix]);
233	CvCLONE_on(kid);
234	SvPADMY_on(kid);
235	npad[ix] = (SV*)kid;
236	}
237	}
238	#endif
239		230
240	return newpadlist;	231	return newpadlist;
241	}	232	}
242		233
243	STATIC void	234	static void
244	free_padlist (pTHX_ AV *padlist)	235	free_padlist (pTHX_ AV *padlist)
245	{	236	{
246	/* may be during global destruction */	237	/* may be during global destruction */
247	if (SvREFCNT (padlist))	238	if (SvREFCNT (padlist))
248	{	239	{
…		…
262		253
263	SvREFCNT_dec ((SV*)padlist);	254	SvREFCNT_dec ((SV*)padlist);
264	}	255	}
265	}	256	}
266		257
267	STATIC int	258	static int
268	coro_cv_free (pTHX_ SV sv, MAGIC mg)	259	coro_cv_free (pTHX_ SV sv, MAGIC mg)
269	{	260	{
270	AV *padlist;	261	AV *padlist;
271	AV av = (AV )mg->mg_obj;	262	AV av = (AV )mg->mg_obj;
272		263
273	/* casting is fun. */	264	/* casting is fun. */
274	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	265	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
275	free_padlist (aTHX_ padlist);	266	free_padlist (aTHX_ padlist);
276		267
277	SvREFCNT_dec (av);	268	SvREFCNT_dec (av);
		269
		270	return 0;
278	}	271	}
279		272
280	#define PERL_MAGIC_coro PERL_MAGIC_ext	273	#define PERL_MAGIC_coro PERL_MAGIC_ext
281		274
282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	275	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
283		276
		277	#define CORO_MAGIC(cv) \
		278	SvMAGIC (cv) \
		279	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		280	? SvMAGIC (cv) \
		281	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		282	: 0
		283
284	/* the next two functions merely cache the padlists */	284	/* the next two functions merely cache the padlists */
285	STATIC void	285	static void
286	get_padlist (pTHX_ CV *cv)	286	get_padlist (pTHX_ CV *cv)
287	{	287	{
288	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	288	MAGIC *mg = CORO_MAGIC (cv);
		289	AV *av;
289		290
290	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	291	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
291	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	292	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
292	else	293	else
		294	{
		295	#if CORO_PREFER_PERL_FUNCTIONS
		296	/* this is probably cleaner, but also slower? */
		297	CV *cp = Perl_cv_clone (cv);
		298	CvPADLIST (cv) = CvPADLIST (cp);
		299	CvPADLIST (cp) = 0;
		300	SvREFCNT_dec (cp);
		301	#else
293	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	302	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		303	#endif
		304	}
294	}	305	}
295		306
296	STATIC void	307	static void
297	put_padlist (pTHX_ CV *cv)	308	put_padlist (pTHX_ CV *cv)
298	{	309	{
299	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	310	MAGIC *mg = CORO_MAGIC (cv);
		311	AV *av;
300		312
301	if (!mg)	313	if (!mg)
302	{	314	{
303	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	315	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
304	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	316	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
305	mg->mg_virtual = &vtbl_coro;	317	mg->mg_virtual = &vtbl_coro;
306	mg->mg_obj = (SV *)newAV ();	318	mg->mg_obj = (SV *)newAV ();
307	}	319	}
308		320
309	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	321	av = (AV *)mg->mg_obj;
		322
		323	if (AvFILLp (av) >= AvMAX (av))
		324	av_extend (av, AvMAX (av) + 1);
		325
		326	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
310	}	327	}
		328
		329	/ load & save, init *****************************************************/
311		330
312	#define SB do {	331	#define SB do {
313	#define SE } while (0)	332	#define SE } while (0)
314		333
315	#define LOAD(state) load_state(aTHX_ (state));
316	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
317
318	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	334	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
319		335
320	static void	336	static void
321	load_state(pTHX_ Coro__State c)	337	load_perl (pTHX_ Coro__State c)
322	{	338	{
323	PL_dowarn = c->dowarn;	339	#define VAR(name,type) PL_ ## name = c->name;
324	PL_in_eval = c->in_eval;	340	# include "state.h"
325		341	#undef VAR
326	PL_curstackinfo = c->curstackinfo;
327	PL_curstack = c->curstack;
328	PL_mainstack = c->mainstack;
329	PL_stack_sp = c->stack_sp;
330	PL_op = c->op;
331	PL_curpad = c->curpad;
332	PL_comppad = c->comppad;
333	PL_compcv = c->compcv;
334	PL_stack_base = c->stack_base;
335	PL_stack_max = c->stack_max;
336	PL_tmps_stack = c->tmps_stack;
337	PL_tmps_floor = c->tmps_floor;
338	PL_tmps_ix = c->tmps_ix;
339	PL_tmps_max = c->tmps_max;
340	PL_markstack = c->markstack;
341	PL_markstack_ptr = c->markstack_ptr;
342	PL_markstack_max = c->markstack_max;
343	PL_scopestack = c->scopestack;
344	PL_scopestack_ix = c->scopestack_ix;
345	PL_scopestack_max = c->scopestack_max;
346	PL_savestack = c->savestack;
347	PL_savestack_ix = c->savestack_ix;
348	PL_savestack_max = c->savestack_max;
349	PL_retstack = c->retstack;
350	PL_retstack_ix = c->retstack_ix;
351	PL_retstack_max = c->retstack_max;
352	PL_curcop = c->curcop;
353	PL_top_env = c->top_env;
354		342
355	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	343	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
356	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	344	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
357	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	345	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		346	if (c->irssv)
		347	{
		348	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
		349	SvREFCNT_dec (c->irssv);
		350	else
		351	{
		352	REPLACE_SV (PL_rs, c->irssv);
		353	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		354	sv_setsv (c->irssv_sv, PL_rs);
		355	}
		356	}
358		357
359	{	358	{
360	dSP;	359	dSP;
361	CV *cv;	360	CV *cv;
362		361
363	/* now do the ugly restore mess */	362	/* now do the ugly restore mess */
364	while ((cv = (CV *)POPs))	363	while ((cv = (CV *)POPs))
365	{	364	{
366	AV padlist = (AV )POPs;
367
368	if (padlist)
369	{
370	put_padlist (aTHX_ cv); /* mark this padlist as available */	365	put_padlist (aTHX_ cv); /* mark this padlist as available */
371	CvPADLIST(cv) = padlist;	366	CvDEPTH (cv) = PTR2IV (POPs);
372	}	367	CvPADLIST (cv) = (AV *)POPs;
373
374	++CvDEPTH(cv);
375	}	368	}
376		369
377	PUTBACK;	370	PUTBACK;
378	}	371	}
		372	assert (!PL_comppad \|\| AvARRAY (PL_comppad));//D
379	}	373	}
380		374
381	static void	375	static void
382	save_state(pTHX_ Coro__State c, int flags)	376	save_perl (pTHX_ Coro__State c)
383	{	377	{
		378	assert (!PL_comppad \|\| AvARRAY (PL_comppad));//D
384	{	379	{
385	dSP;	380	dSP;
386	I32 cxix = cxstack_ix;	381	I32 cxix = cxstack_ix;
387	PERL_CONTEXT *ccstk = cxstack;	382	PERL_CONTEXT *ccstk = cxstack;
388	PERL_SI *top_si = PL_curstackinfo;	383	PERL_SI *top_si = PL_curstackinfo;
…		…
390	/*	385	/*
391	* the worst thing you can imagine happens first - we have to save	386	* the worst thing you can imagine happens first - we have to save
392	* (and reinitialize) all cv's in the whole callchain :(	387	* (and reinitialize) all cv's in the whole callchain :(
393	*/	388	*/
394		389
		390	EXTEND (SP, 3 + 1);
395	PUSHs (Nullsv);	391	PUSHs (Nullsv);
396	/* this loop was inspired by pp_caller */	392	/* this loop was inspired by pp_caller */
397	for (;;)	393	for (;;)
398	{	394	{
399	while (cxix >= 0)	395	while (cxix >= 0)
400	{	396	{
401	PERL_CONTEXT *cx = &ccstk[cxix--];	397	PERL_CONTEXT *cx = &ccstk[cxix--];
402		398
403	if (CxTYPE(cx) == CXt_SUB)	399	if (CxTYPE (cx) == CXt_SUB)
404	{	400	{
405	CV *cv = cx->blk_sub.cv;	401	CV *cv = cx->blk_sub.cv;
		402
406	if (CvDEPTH(cv))	403	if (CvDEPTH (cv))
407	{	404	{
408	EXTEND (SP, CvDEPTH(cv)*2);	405	EXTEND (SP, 3);
409
410	while (--CvDEPTH(cv))
411	{
412	/* this tells the restore code to increment CvDEPTH */
413	PUSHs (Nullsv);
414	PUSHs ((SV *)cv);
415	}
416
417	PUSHs ((SV *)CvPADLIST(cv));	406	PUSHs ((SV *)CvPADLIST (cv));
		407	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
418	PUSHs ((SV *)cv);	408	PUSHs ((SV *)cv);
419		409
		410	CvDEPTH (cv) = 0;
420	get_padlist (aTHX_ cv); /* this is a monster */	411	get_padlist (aTHX_ cv);
421	}	412	}
422	}	413	}
423	#ifdef CXt_FORMAT
424	else if (CxTYPE(cx) == CXt_FORMAT)
425	{
426	/* I never used formats, so how should I know how these are implemented? */
427	/* my bold guess is as a simple, plain sub... */
428	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
429	}
430	#endif
431	}	414	}
432		415
433	if (top_si->si_type == PERLSI_MAIN)	416	if (top_si->si_type == PERLSI_MAIN)
434	break;	417	break;
435		418
…		…
439	}	422	}
440		423
441	PUTBACK;	424	PUTBACK;
442	}	425	}
443		426
444	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	427	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
445	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	428	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
446	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	429	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		430	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
447		431
448	c->dowarn = PL_dowarn;	432	#define VAR(name,type)c->name = PL_ ## name;
449	c->in_eval = PL_in_eval;	433	# include "state.h"
450		434	#undef VAR
451	c->curstackinfo = PL_curstackinfo;
452	c->curstack = PL_curstack;
453	c->mainstack = PL_mainstack;
454	c->stack_sp = PL_stack_sp;
455	c->op = PL_op;
456	c->curpad = PL_curpad;
457	c->comppad = PL_comppad;
458	c->compcv = PL_compcv;
459	c->stack_base = PL_stack_base;
460	c->stack_max = PL_stack_max;
461	c->tmps_stack = PL_tmps_stack;
462	c->tmps_floor = PL_tmps_floor;
463	c->tmps_ix = PL_tmps_ix;
464	c->tmps_max = PL_tmps_max;
465	c->markstack = PL_markstack;
466	c->markstack_ptr = PL_markstack_ptr;
467	c->markstack_max = PL_markstack_max;
468	c->scopestack = PL_scopestack;
469	c->scopestack_ix = PL_scopestack_ix;
470	c->scopestack_max = PL_scopestack_max;
471	c->savestack = PL_savestack;
472	c->savestack_ix = PL_savestack_ix;
473	c->savestack_max = PL_savestack_max;
474	c->retstack = PL_retstack;
475	c->retstack_ix = PL_retstack_ix;
476	c->retstack_max = PL_retstack_max;
477	c->curcop = PL_curcop;
478	c->top_env = PL_top_env;
479	}	435	}
480		436
481	/*	437	/*
482	* allocate various perl stacks. This is an exact copy	438	* allocate various perl stacks. This is an exact copy
483	* of perl.c:init_stacks, except that it uses less memory	439	* of perl.c:init_stacks, except that it uses less memory
484	* on the (sometimes correct) assumption that coroutines do	440	* on the (sometimes correct) assumption that coroutines do
485	* not usually need a lot of stackspace.	441	* not usually need a lot of stackspace.
486	*/	442	*/
487	STATIC void	443	#if CORO_PREFER_PERL_FUNCTIONS
		444	# define coro_init_stacks init_stacks
		445	#else
		446	static void
488	coro_init_stacks (pTHX)	447	coro_init_stacks (pTHX)
489	{	448	{
490	LOCK;
491
492	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	449	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
493	PL_curstackinfo->si_type = PERLSI_MAIN;	450	PL_curstackinfo->si_type = PERLSI_MAIN;
494	PL_curstack = PL_curstackinfo->si_stack;	451	PL_curstack = PL_curstackinfo->si_stack;
495	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496		453
497	PL_stack_base = AvARRAY(PL_curstack);	454	PL_stack_base = AvARRAY(PL_curstack);
498	PL_stack_sp = PL_stack_base;	455	PL_stack_sp = PL_stack_base;
499	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
500		457
501	New(50,PL_tmps_stack,96,SV*);	458	New(50,PL_tmps_stack,128,SV*);
502	PL_tmps_floor = -1;	459	PL_tmps_floor = -1;
503	PL_tmps_ix = -1;	460	PL_tmps_ix = -1;
504	PL_tmps_max = 96;	461	PL_tmps_max = 128;
505		462
506	New(54,PL_markstack,16,I32);	463	New(54,PL_markstack,32,I32);
507	PL_markstack_ptr = PL_markstack;	464	PL_markstack_ptr = PL_markstack;
508	PL_markstack_max = PL_markstack + 16;	465	PL_markstack_max = PL_markstack + 32;
509		466
510	#ifdef SET_MARK_OFFSET	467	#ifdef SET_MARK_OFFSET
511	SET_MARK_OFFSET;	468	SET_MARK_OFFSET;
512	#endif	469	#endif
513		470
514	New(54,PL_scopestack,16,I32);	471	New(54,PL_scopestack,32,I32);
515	PL_scopestack_ix = 0;	472	PL_scopestack_ix = 0;
516	PL_scopestack_max = 16;	473	PL_scopestack_max = 32;
517		474
518	New(54,PL_savestack,96,ANY);	475	New(54,PL_savestack,64,ANY);
519	PL_savestack_ix = 0;	476	PL_savestack_ix = 0;
520	PL_savestack_max = 96;	477	PL_savestack_max = 64;
521		478
		479	#if !PERL_VERSION_ATLEAST (5,9,0)
522	New(54,PL_retstack,8,OP*);	480	New(54,PL_retstack,16,OP*);
523	PL_retstack_ix = 0;	481	PL_retstack_ix = 0;
524	PL_retstack_max = 8;	482	PL_retstack_max = 16;
525		483	#endif
526	UNLOCK;
527	}	484	}
		485	#endif
528		486
529	/*	487	/*
530	* destroy the stacks, the callchain etc...	488	* destroy the stacks, the callchain etc...
531	*/	489	*/
532	STATIC void	490	static void
533	destroy_stacks(pTHX)	491	coro_destroy_stacks (pTHX)
534	{	492	{
535	if (!IN_DESTRUCT)	493	if (!IN_DESTRUCT)
536	{	494	{
537	/* is this ugly, I ask? */	495	/* restore all saved variables and stuff */
538	LEAVE_SCOPE (0);	496	LEAVE_SCOPE (0);
		497	assert (PL_tmps_floor == -1);
539		498
540	/* sure it is, but more important: is it correct?? :/ */	499	/* free all temporaries */
541	FREETMPS;	500	FREETMPS;
		501	assert (PL_tmps_ix == -1);
542		502
		503	/* unwind all extra stacks */
543	/POPSTACK_TO (PL_mainstack);//D//use/	504	POPSTACK_TO (PL_mainstack);
		505
		506	/* unwind main stack */
		507	dounwind (-1);
544	}	508	}
545		509
546	while (PL_curstackinfo->si_next)	510	while (PL_curstackinfo->si_next)
547	PL_curstackinfo = PL_curstackinfo->si_next;	511	PL_curstackinfo = PL_curstackinfo->si_next;
548		512
549	while (PL_curstackinfo)	513	while (PL_curstackinfo)
550	{	514	{
551	PERL_SI *p = PL_curstackinfo->si_prev;	515	PERL_SI *p = PL_curstackinfo->si_prev;
552		516
553	{ /D//remove/
554	dSP;
555	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
556	PUTBACK; /* possibly superfluous */
557	}
558
559	if (!IN_DESTRUCT)	517	if (!IN_DESTRUCT)
560	{
561	dounwind (-1);/D//remove/
562	SvREFCNT_dec (PL_curstackinfo->si_stack);	518	SvREFCNT_dec (PL_curstackinfo->si_stack);
563	}
564		519
565	Safefree (PL_curstackinfo->si_cxstack);	520	Safefree (PL_curstackinfo->si_cxstack);
566	Safefree (PL_curstackinfo);	521	Safefree (PL_curstackinfo);
567	PL_curstackinfo = p;	522	PL_curstackinfo = p;
568	}	523	}
569		524
570	Safefree (PL_tmps_stack);	525	Safefree (PL_tmps_stack);
571	Safefree (PL_markstack);	526	Safefree (PL_markstack);
572	Safefree (PL_scopestack);	527	Safefree (PL_scopestack);
573	Safefree (PL_savestack);	528	Safefree (PL_savestack);
		529	#if !PERL_VERSION_ATLEAST (5,9,0)
574	Safefree (PL_retstack);	530	Safefree (PL_retstack);
575	}
576
577	static void
578	allocate_stack (Coro__State ctx, int alloc)
579	{
580	coro_stack *stack;
581
582	New (0, stack, 1, coro_stack);
583
584	stack->refcnt = 1;
585	stack->usecnt = 1;
586	stack->gencnt = ctx->gencnt = 0;
587
588	if (alloc)
589	{
590	#if HAVE_MMAP
591	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
592	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
593	if (stack->sptr == (void *)-1)
594	#endif	531	#endif
595	{
596	/FIXME//D//* reasonable stack size! */
597	stack->ssize = - (8192 * sizeof (long));
598	New (0, stack->sptr, 8192, long);
599	}
600	}
601	else
602	stack->sptr = 0;
603
604	ctx->stack = stack;
605	}	532	}
606		533
607	static void	534	/ coroutine stack handling **********************************************/
608	deallocate_stack (Coro__State ctx)
609	{
610	coro_stack *stack = ctx->stack;
611		535
612	ctx->stack = 0;
613
614	if (stack)
615	{
616	if (!--stack->refcnt)
617	{
618	#ifdef HAVE_MMAP
619	if (stack->ssize > 0 && stack->sptr)
620	munmap (stack->sptr, stack->ssize);
621	else
622	#endif
623	Safefree (stack->sptr);
624
625	Safefree (stack);
626	}
627	else if (ctx->gencnt == stack->gencnt)
628	--stack->usecnt;
629	}
630	}
631
632	static void	536	static void
633	setup_coro (void *arg)	537	setup_coro (pTHX_ struct coro *coro)
634	{	538	{
635	/*	539	/*
636	* emulate part of the perl startup here.	540	* emulate part of the perl startup here.
637	*/	541	*/
		542	coro_init_stacks (aTHX);
		543
		544	PL_curcop = &PL_compiling;
		545	PL_in_eval = EVAL_NULL;
		546	PL_comppad = 0;
		547	PL_curpm = 0;
		548	PL_localizing = 0;
		549	PL_dirty = 0;
		550	PL_restartop = 0;
		551
		552	{
		553	dSP;
		554	LOGOP myop;
		555
		556	SvREFCNT_dec (GvAV (PL_defgv));
		557	GvAV (PL_defgv) = coro->args; coro->args = 0;
		558
		559	Zero (&myop, 1, LOGOP);
		560	myop.op_next = Nullop;
		561	myop.op_flags = OPf_WANT_VOID;
		562
		563	PUSHMARK (SP);
		564	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		565	PUTBACK;
		566	PL_op = (OP *)&myop;
		567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		568	SPAGAIN;
		569	}
		570
		571	ENTER; /* necessary e.g. for dounwind */
		572	}
		573
		574	static void
		575	free_coro_mortal (pTHX)
		576	{
		577	if (coro_mortal)
		578	{
		579	SvREFCNT_dec (coro_mortal);
		580	coro_mortal = 0;
		581	}
		582	}
		583
		584	/* inject a fake call to Coro::State::_cctx_init into the execution */
		585	static void NOINLINE
		586	prepare_cctx (pTHX_ coro_cctx *cctx)
		587	{
		588	dSP;
		589	LOGOP myop;
		590
		591	Zero (&myop, 1, LOGOP);
		592	myop.op_next = PL_op;
		593	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		594
		595	PUSHMARK (SP);
		596	EXTEND (SP, 2);
		597	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		598	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		599	PUTBACK;
		600	PL_op = (OP *)&myop;
		601	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		602	SPAGAIN;
		603	}
		604
		605	static void
		606	coro_run (void *arg)
		607	{
638	dTHX;	608	dTHX;
639	dSP;
640	Coro__State ctx = (Coro__State)arg;
641	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
642		609
643	coro_init_stacks (aTHX);	610	/* coro_run is the alternative tail of transfer(), so unlock here. */
644	/PL_curcop = 0;/	611	UNLOCK;
645	/PL_in_eval = PL_in_eval;/ /* inherit */
646	SvREFCNT_dec (GvAV (PL_defgv));
647	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
648		612
649	SPAGAIN;
650
651	if (ctx->stack)
652	{
653	ctx->cursp = 0;
654
655	PUSHMARK(SP);
656	PUTBACK;
657	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
658
659	if (SvTRUE (ERRSV))
660	croak (NULL);
661	else
662	croak ("FATAL: CCTXT coroutine returned!");
663	}
664	else
665	{
666	UNOP myop;
667
668	PL_op = (OP *)&myop;
669
670	Zero(&myop, 1, UNOP);
671	myop.op_next = Nullop;
672	myop.op_flags = OPf_WANT_VOID;
673
674	PUSHMARK(SP);
675	XPUSHs (sub_init);
676	/*
677	* the next line is slightly wrong, as PL_op->op_next
678	* is actually being executed so we skip the first op.
679	* that doesn't matter, though, since it is only
680	* pp_nextstate and we never return...
681	* ah yes, and I don't care anyways ;)
682	*/
683	PUTBACK;
684	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685	SPAGAIN;
686
687	ENTER; /* necessary e.g. for dounwind */
688	}
689	}
690
691	static void
692	continue_coro (void *arg)
693	{
694	/*	613	/*
695	* this is a _very_ stripped down perl interpreter ;)	614	* this is a _very_ stripped down perl interpreter ;)
696	*/	615	*/
697	dTHX;
698	Coro__State ctx = (Coro__State)arg;
699	JMPENV coro_start_env;
700
701	PL_top_env = &ctx->start_env;	616	PL_top_env = &PL_start_env;
702		617
703	ctx->cursp = 0;	618	/* inject call to cctx_init */
		619	prepare_cctx (aTHX_ (coro_cctx *)arg);
		620
		621	/* somebody will hit me for both perl_run and PL_restartop */
		622	PL_restartop = PL_op;
		623	perl_run (PL_curinterp);
		624
		625	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		626	abort ();
		627	}
		628
		629	static coro_cctx *
		630	cctx_new ()
		631	{
		632	coro_cctx *cctx;
		633	void *stack_start;
		634	size_t stack_size;
		635
		636	++cctx_count;
		637
		638	Newz (0, cctx, 1, coro_cctx);
		639
		640	#if HAVE_MMAP
		641
		642	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		643	/* mmap supposedly does allocate-on-write for us */
		644	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		645
		646	if (cctx->sptr != (void *)-1)
		647	{
		648	# if CORO_STACKGUARD
		649	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		650	# endif
		651	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		652	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		653	cctx->mapped = 1;
		654	}
		655	else
		656	#endif
		657	{
		658	cctx->ssize = coro_stacksize * (long)sizeof (long);
		659	New (0, cctx->sptr, coro_stacksize, long);
		660
		661	if (!cctx->sptr)
		662	{
		663	perror ("FATAL: unable to allocate stack for coroutine");
		664	_exit (EXIT_FAILURE);
		665	}
		666
		667	stack_start = cctx->sptr;
		668	stack_size = cctx->ssize;
		669	}
		670
		671	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		672	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		673
		674	return cctx;
		675	}
		676
		677	static void
		678	cctx_destroy (coro_cctx *cctx)
		679	{
		680	if (!cctx)
		681	return;
		682
		683	--cctx_count;
		684
		685	#if CORO_USE_VALGRIND
		686	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		687	#endif
		688
		689	#if HAVE_MMAP
		690	if (cctx->mapped)
		691	munmap (cctx->sptr, cctx->ssize);
		692	else
		693	#endif
		694	Safefree (cctx->sptr);
		695
		696	Safefree (cctx);
		697	}
		698
		699	static coro_cctx *
		700	cctx_get (pTHX)
		701	{
		702	while (cctx_first)
		703	{
		704	coro_cctx *cctx = cctx_first;
		705	cctx_first = cctx->next;
		706	--cctx_idle;
		707
		708	if (cctx->ssize >= coro_stacksize)
		709	return cctx;
		710
		711	cctx_destroy (cctx);
		712	}
		713
704	PL_op = PL_op->op_next;	714	PL_op = PL_op->op_next;
705	CALLRUNOPS(aTHX);	715	return cctx_new ();
706
707	abort ();
708	}	716	}
709		717
710	STATIC void	718	static void
		719	cctx_put (coro_cctx *cctx)
		720	{
		721	/* free another cctx if overlimit */
		722	if (cctx_idle >= MAX_IDLE_CCTX)
		723	{
		724	coro_cctx *first = cctx_first;
		725	cctx_first = first->next;
		726	--cctx_idle;
		727
		728	assert (!first->inuse);
		729	cctx_destroy (first);
		730	}
		731
		732	++cctx_idle;
		733	cctx->next = cctx_first;
		734	cctx_first = cctx;
		735	}
		736
		737	/ coroutine switching ***************************************************/
		738
		739	/* never call directly, always through the coro_state_transfer global variable */
		740	static void NOINLINE
711	transfer (pTHX_ struct coro prev, struct coro next, int flags)	741	transfer (pTHX_ struct coro prev, struct coro next)
712	{	742	{
713	dSTACKLEVEL;	743	dSTACKLEVEL;
714		744
		745	/* sometimes transfer is only called to set idle_sp */
		746	if (!next)
		747	{
		748	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		749	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		750	}
715	if (prev != next)	751	else if (prev != next)
716	{	752	{
717	if (next->mainstack)	753	coro_cctx *prev__cctx;
		754
		755	if (prev->flags & CF_NEW)
718	{	756	{
719	LOCK;	757	/* create a new empty context */
720	SAVE (prev, flags);	758	Newz (0, prev->cctx, 1, coro_cctx);
721	LOAD (next);	759	prev->cctx->inuse = 1;
722	UNLOCK;	760	prev->flags &= ~CF_NEW;
723		761	prev->flags \|= CF_RUNNING;
724	/* mark this state as in-use */
725	next->mainstack = 0;
726	next->tmps_ix = -2;
727
728	/* stacklevel changed? if yes, grab the stack for us! */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733	else if (prev->cursp != stacklevel
734	&& prev->stack->usecnt > 1)
735	{
736	prev->gencnt = ++prev->stack->gencnt;
737	prev->stack->usecnt = 1;
738	}
739
740	/* has our stack been invalidated? */
741	if (next->stack && next->stack->gencnt != next->gencnt)
742	{
743	deallocate_stack (next);
744	allocate_stack (next, 1);
745	coro_create (&(next->stack->cctx),
746	continue_coro, (void *)next,
747	next->stack->sptr, labs (next->stack->ssize));
748	}
749
750	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751	prev->cursp = stacklevel;
752	/* don't add any code here */
753	}
754	else
755	next->cursp = stacklevel;
756	}	762	}
757	else if (next->tmps_ix == -2)	763
758	croak ("tried to transfer to running coroutine");	764	/TODO: must not croak here /
		765	if (!prev->flags & CF_RUNNING)
		766	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		767
		768	if (next->flags & CF_RUNNING)
		769	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		770
		771	if (next->flags & CF_DESTROYED)
		772	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		773
		774	prev->flags &= ~CF_RUNNING;
		775	next->flags \|= CF_RUNNING;
		776
		777	LOCK;
		778
		779	if (next->flags & CF_NEW)
		780	{
		781	/* need to start coroutine */
		782	next->flags &= ~CF_NEW;
		783	/* first get rid of the old state */
		784	save_perl (aTHX_ prev);
		785	/* setup coroutine call */
		786	setup_coro (aTHX_ next);
		787	/* need a new stack */
		788	assert (!next->cctx);
		789	}
759	else	790	else
760	{	791	{
761	LOCK;	792	/* coroutine already started */
762	SAVE (prev, -1); /* first get rid of the old state */	793	save_perl (aTHX_ prev);
763	UNLOCK;	794	load_perl (aTHX_ next);
764
765	if (flags & TRANSFER_SAVE_CCTXT)
766	{
767	if (!prev->stack)
768	allocate_stack (prev, 0);
769
770	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
771	{
772	PL_top_env = &next->start_env;
773
774	setup_coro (next);
775	next->cursp = stacklevel;
776
777	prev->stack->refcnt++;
778	prev->stack->usecnt++;
779	next->stack = prev->stack;
780	next->gencnt = prev->gencnt;
781	}
782	else
783	{
784	assert (!next->stack);
785	allocate_stack (next, 1);
786	coro_create (&(next->stack->cctx),
787	setup_coro, (void *)next,
788	next->stack->sptr, labs (next->stack->ssize));
789	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
790	prev->cursp = stacklevel;
791	/* don't add any code here */
792	}
793	}
794	else
795	{
796	setup_coro (next);
797	next->cursp = stacklevel;
798	}
799	}	795	}
800	}
801		796
802	LOCK;	797	prev__cctx = prev->cctx;
803	if (coro_mortal)	798
804	{	799	/* possibly "free" the cctx */
805	SvREFCNT_dec (coro_mortal);	800	if (prev__cctx->idle_sp == STACKLEVEL)
806	coro_mortal = 0;	801	{
807	}	802	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		803	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		804
		805	prev->cctx = 0;
		806
		807	cctx_put (prev__cctx);
		808	prev__cctx->inuse = 0;
		809	}
		810
		811	if (!next->cctx)
		812	{
		813	next->cctx = cctx_get (aTHX);
		814	assert (!next->cctx->inuse);
		815	next->cctx->inuse = 1;
		816	}
		817
		818	if (prev__cctx != next->cctx)
		819	{
		820	prev__cctx->top_env = PL_top_env;
		821	PL_top_env = next->cctx->top_env;
		822	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		823	}
		824
		825	free_coro_mortal (aTHX);
808	UNLOCK;	826	UNLOCK;
		827	}
809	}	828	}
810		829
811	#define SV_CORO(sv,func) \	830	struct transfer_args
812	do { \	831	{
813	if (SvROK (sv)) \	832	struct coro prev, next;
814	sv = SvRV (sv); \	833	};
815	\
816	if (SvTYPE (sv) == SVt_PVHV) \
817	{ \
818	HE he = hv_fetch_ent ((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
819	\
820	if (!he) \
821	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
822	\
823	(sv) = SvRV (HeVAL(he)); \
824	} \
825	\
826	/* must also be changed inside Coro::Cont::yield */ \
827	if (!SvOBJECT (sv) \|\| SvSTASH (sv) != coro_state_stash) \
828	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
829	\
830	} while(0)
831		834
832	#define SvSTATE(sv) (struct coro *)SvIV (sv)	835	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
833		836
		837	/ high level stuff ******************************************************/
		838
834	static void	839	static int
		840	coro_state_destroy (pTHX_ struct coro *coro)
		841	{
		842	if (coro->flags & CF_DESTROYED)
		843	return 0;
		844
		845	coro->flags \|= CF_DESTROYED;
		846
		847	if (coro->flags & CF_READY)
		848	{
		849	/* reduce nready, as destroying a ready coro effectively unreadies it */
		850	/* alternative: look through all ready queues and remove the coro */
		851	LOCK;
		852	--coro_nready;
		853	UNLOCK;
		854	}
		855	else
		856	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
		857
		858	if (coro->mainstack && coro->mainstack != main_mainstack)
		859	{
		860	struct coro temp;
		861
		862	assert (!(coro->flags & CF_RUNNING));
		863
		864	Zero (&temp, 1, struct coro);
		865	temp.save = CORO_SAVE_ALL;
		866
		867	if (coro->flags & CF_RUNNING)
		868	croak ("FATAL: tried to destroy currently running coroutine");
		869
		870	save_perl (aTHX_ &temp);
		871	load_perl (aTHX_ coro);
		872
		873	coro_destroy_stacks (aTHX);
		874
		875	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		876
		877	coro->mainstack = 0;
		878	}
		879
		880	cctx_destroy (coro->cctx);
		881	SvREFCNT_dec (coro->args);
		882
		883	return 1;
		884	}
		885
		886	static int
		887	coro_state_free (pTHX_ SV sv, MAGIC mg)
		888	{
		889	struct coro coro = (struct coro )mg->mg_ptr;
		890	mg->mg_ptr = 0;
		891
		892	if (--coro->refcnt < 0)
		893	{
		894	coro_state_destroy (aTHX_ coro);
		895	Safefree (coro);
		896	}
		897
		898	return 0;
		899	}
		900
		901	static int
		902	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		903	{
		904	struct coro coro = (struct coro )mg->mg_ptr;
		905
		906	++coro->refcnt;
		907
		908	return 0;
		909	}
		910
		911	static MGVTBL coro_state_vtbl = {
		912	0, 0, 0, 0,
		913	coro_state_free,
		914	0,
		915	#ifdef MGf_DUP
		916	coro_state_dup,
		917	#else
		918	# define MGf_DUP 0
		919	#endif
		920	};
		921
		922	static struct coro *
		923	SvSTATE_ (pTHX_ SV *coro)
		924	{
		925	HV *stash;
		926	MAGIC *mg;
		927
		928	if (SvROK (coro))
		929	coro = SvRV (coro);
		930
		931	stash = SvSTASH (coro);
		932	if (stash != coro_stash && stash != coro_state_stash)
		933	{
		934	/* very slow, but rare, check */
		935	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		936	croak ("Coro::State object required");
		937	}
		938
		939	mg = CORO_MAGIC (coro);
		940	return (struct coro *)mg->mg_ptr;
		941	}
		942
		943	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		944
		945	static void
		946	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		947	{
		948	ta->prev = SvSTATE (prev_sv);
		949	ta->next = SvSTATE (next_sv);
		950	}
		951
		952	static void
835	api_transfer(pTHX_ SV prev, SV next, int flags)	953	api_transfer (SV prev_sv, SV next_sv)
836	{	954	{
837	SV_CORO (prev, "Coro::transfer");	955	dTHX;
838	SV_CORO (next, "Coro::transfer");	956	struct transfer_args ta;
839		957
840	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	958	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		959	TRANSFER (ta);
		960	}
		961
		962	static int
		963	api_save (SV *coro_sv, int new_save)
		964	{
		965	dTHX;
		966	struct coro *coro = SvSTATE (coro_sv);
		967	int old_save = coro->save;
		968
		969	if (new_save >= 0)
		970	coro->save = new_save;
		971
		972	return old_save;
841	}	973	}
842		974
843	/ Coro ******************************************************************/	975	/ Coro ******************************************************************/
844		976
845	#define PRIO_MAX 3
846	#define PRIO_HIGH 1
847	#define PRIO_NORMAL 0
848	#define PRIO_LOW -1
849	#define PRIO_IDLE -3
850	#define PRIO_MIN -4
851
852	/* for Coro.pm */
853	static GV coro_current, coro_idle;
854	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
855	static int coro_nready;
856
857	static void	977	static void
858	coro_enq (pTHX_ SV *sv)	978	coro_enq (pTHX_ SV *coro_sv)
859	{	979	{
860	if (SvTYPE (sv) == SVt_PVHV)
861	{
862	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
863	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
864
865	prio = prio > PRIO_MAX ? PRIO_MAX
866	: prio < PRIO_MIN ? PRIO_MIN
867	: prio;
868
869	av_push (coro_ready [prio - PRIO_MIN], sv);	980	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
870	coro_nready++;
871
872	return;
873	}
874
875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
876	}	981	}
877		982
878	static SV *	983	static SV *
879	coro_deq (pTHX_ int min_prio)	984	coro_deq (pTHX_ int min_prio)
880	{	985	{
…		…
883	min_prio -= PRIO_MIN;	988	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	989	if (min_prio < 0)
885	min_prio = 0;	990	min_prio = 0;
886		991
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	992	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (av_len (coro_ready[prio]) >= 0)	993	if (AvFILLp (coro_ready [prio]) >= 0)
889	{
890	coro_nready--;
891	return av_shift (coro_ready[prio]);	994	return av_shift (coro_ready [prio]);
892	}
893		995
894	return 0;	996	return 0;
895	}	997	}
896		998
897	static void	999	static int
898	api_ready (SV *coro)	1000	api_ready (SV *coro_sv)
899	{	1001	{
900	dTHX;	1002	dTHX;
		1003	struct coro *coro;
901		1004
902	if (SvROK (coro))	1005	if (SvROK (coro_sv))
903	coro = SvRV (coro);	1006	coro_sv = SvRV (coro_sv);
		1007
		1008	coro = SvSTATE (coro_sv);
		1009
		1010	if (coro->flags & CF_READY)
		1011	return 0;
		1012
		1013	coro->flags \|= CF_READY;
904		1014
905	LOCK;	1015	LOCK;
906	coro_enq (aTHX_ SvREFCNT_inc (coro));	1016	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1017	++coro_nready;
907	UNLOCK;	1018	UNLOCK;
		1019
		1020	return 1;
		1021	}
		1022
		1023	static int
		1024	api_is_ready (SV *coro_sv)
		1025	{
		1026	dTHX;
		1027	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1028	}
		1029
		1030	static void
		1031	prepare_schedule (pTHX_ struct transfer_args *ta)
		1032	{
		1033	SV prev_sv, next_sv;
		1034
		1035	for (;;)
		1036	{
		1037	LOCK;
		1038	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1039
		1040	/* nothing to schedule: call the idle handler */
		1041	if (!next_sv)
		1042	{
		1043	dSP;
		1044	UNLOCK;
		1045
		1046	ENTER;
		1047	SAVETMPS;
		1048
		1049	PUSHMARK (SP);
		1050	PUTBACK;
		1051	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1052
		1053	FREETMPS;
		1054	LEAVE;
		1055	continue;
		1056	}
		1057
		1058	ta->next = SvSTATE (next_sv);
		1059
		1060	/* cannot transfer to destroyed coros, skip and look for next */
		1061	if (ta->next->flags & CF_DESTROYED)
		1062	{
		1063	UNLOCK;
		1064	SvREFCNT_dec (next_sv);
		1065	/* coro_nready is already taken care of by destroy */
		1066	continue;
		1067	}
		1068
		1069	--coro_nready;
		1070	UNLOCK;
		1071	break;
		1072	}
		1073
		1074	/* free this only after the transfer */
		1075	prev_sv = SvRV (coro_current);
		1076	SvRV_set (coro_current, next_sv);
		1077	ta->prev = SvSTATE (prev_sv);
		1078
		1079	assert (ta->next->flags & CF_READY);
		1080	ta->next->flags &= ~CF_READY;
		1081
		1082	LOCK;
		1083	free_coro_mortal (aTHX);
		1084	coro_mortal = prev_sv;
		1085	UNLOCK;
		1086	}
		1087
		1088	static void
		1089	prepare_cede (pTHX_ struct transfer_args *ta)
		1090	{
		1091	api_ready (coro_current);
		1092	prepare_schedule (aTHX_ ta);
		1093	}
		1094
		1095	static int
		1096	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1097	{
		1098	if (coro_nready)
		1099	{
		1100	SV *prev = SvRV (coro_current);
		1101	prepare_schedule (aTHX_ ta);
		1102	api_ready (prev);
		1103	return 1;
		1104	}
		1105	else
		1106	return 0;
908	}	1107	}
909		1108
910	static void	1109	static void
911	api_schedule (void)	1110	api_schedule (void)
912	{	1111	{
913	dTHX;	1112	dTHX;
		1113	struct transfer_args ta;
914		1114
915	SV prev, next;	1115	prepare_schedule (aTHX_ &ta);
916		1116	TRANSFER (ta);
917	LOCK;
918
919	prev = SvRV (GvSV (coro_current));
920	next = coro_deq (aTHX_ PRIO_MIN);
921
922	if (!next)
923	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
924
925	/* free this only after the transfer */
926	coro_mortal = prev;
927	SV_CORO (prev, "Coro::schedule");
928
929	SvRV (GvSV (coro_current)) = next;
930
931	SV_CORO (next, "Coro::schedule");
932
933	UNLOCK;
934
935	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
936	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
937	}	1117	}
938		1118
939	static void	1119	static int
940	api_cede (void)	1120	api_cede (void)
941	{	1121	{
942	dTHX;	1122	dTHX;
		1123	struct transfer_args ta;
943		1124
944	LOCK;	1125	prepare_cede (aTHX_ &ta);
945	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
946	UNLOCK;
947		1126
948	api_schedule ();	1127	if (ta.prev != ta.next)
		1128	{
		1129	TRANSFER (ta);
		1130	return 1;
		1131	}
		1132	else
		1133	return 0;
		1134	}
		1135
		1136	static int
		1137	api_cede_notself (void)
		1138	{
		1139	dTHX;
		1140	struct transfer_args ta;
		1141
		1142	if (prepare_cede_notself (aTHX_ &ta))
		1143	{
		1144	TRANSFER (ta);
		1145	return 1;
		1146	}
		1147	else
		1148	return 0;
949	}	1149	}
950		1150
951	MODULE = Coro::State PACKAGE = Coro::State	1151	MODULE = Coro::State PACKAGE = Coro::State
952		1152
953	PROTOTYPES: ENABLE	1153	PROTOTYPES: DISABLE
954		1154
955	BOOT:	1155	BOOT:
956	{ /* {} necessary for stoopid perl-5.6.x */	1156	{
957	#ifdef USE_ITHREADS	1157	#ifdef USE_ITHREADS
958	MUTEX_INIT (&coro_mutex);	1158	MUTEX_INIT (&coro_mutex);
959	#endif	1159	#endif
		1160	BOOT_PAGESIZE;
960		1161
961	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
962	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
963	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1162	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964		1163
965	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1164	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
966	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1165	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
967	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1166	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1167	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
968	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1168	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
969		1169
970	main_mainstack = PL_mainstack;	1170	main_mainstack = PL_mainstack;
971		1171
972	coroapi.ver = CORO_API_VERSION;	1172	coroapi.ver = CORO_API_VERSION;
973	coroapi.transfer = api_transfer;	1173	coroapi.transfer = api_transfer;
974	}
975		1174
976	Coro::State	1175	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
977	_newprocess(args)	1176	}
978	SV * args	1177
979	PROTOTYPE: $	1178	SV *
		1179	new (char *klass, ...)
980	CODE:	1180	CODE:
981	Coro__State coro;	1181	{
		1182	struct coro *coro;
		1183	HV *hv;
		1184	int i;
982		1185
983	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
984	croak ("Coro::State::_newprocess expects an arrayref");
985
986	Newz (0, coro, 1, struct coro);	1186	Newz (0, coro, 1, struct coro);
		1187	coro->args = newAV ();
		1188	coro->save = CORO_SAVE_ALL;
		1189	coro->flags = CF_NEW;
987		1190
988	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1191	hv = newHV ();
989	/coro->mainstack = 0; //actual work is done inside transfer /	1192	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
990	/coro->stack = 0;/	1193	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
991		1194
992	/* same as JMPENV_BOOTSTRAP */	1195	for (i = 1; i < items; i++)
993	/* we might be able to recycle start_env, but safe is safe */	1196	av_push (coro->args, newSVsv (ST (i)));
994	/Zero(&coro->start_env, 1, JMPENV);/	1197	}
995	coro->start_env.je_ret = -1;
996	coro->start_env.je_mustcatch = TRUE;
997
998	RETVAL = coro;
999	OUTPUT:	1198	OUTPUT:
1000	RETVAL	1199	RETVAL
1001		1200
		1201	int
		1202	save (SV *coro, int new_save = -1)
		1203	CODE:
		1204	RETVAL = api_save (coro, new_save);
		1205	OUTPUT:
		1206	RETVAL
		1207
1002	void	1208	void
1003	transfer(prev, next, flags)	1209	_set_stacklevel (...)
1004	SV *prev	1210	ALIAS:
1005	SV *next	1211	Coro::State::transfer = 1
1006	int flags	1212	Coro::schedule = 2
1007	PROTOTYPE: @	1213	Coro::cede = 3
		1214	Coro::cede_notself = 4
1008	CODE:	1215	CODE:
1009	PUTBACK;	1216	{
1010	SV_CORO (next, "Coro::transfer");	1217	struct transfer_args ta;
1011	SV_CORO (prev, "Coro::transfer");	1218
1012	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1219	switch (ix)
1013	SPAGAIN;	1220	{
		1221	case 0:
		1222	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1223	ta.next = 0;
		1224	break;
		1225
		1226	case 1:
		1227	if (items != 2)
		1228	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1229
		1230	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1231	break;
		1232
		1233	case 2:
		1234	prepare_schedule (aTHX_ &ta);
		1235	break;
		1236
		1237	case 3:
		1238	prepare_cede (aTHX_ &ta);
		1239	break;
		1240
		1241	case 4:
		1242	if (!prepare_cede_notself (aTHX_ &ta))
		1243	XSRETURN_EMPTY;
		1244
		1245	break;
		1246	}
		1247
		1248	BARRIER;
		1249	TRANSFER (ta);
		1250
		1251	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1252	XSRETURN_YES;
		1253	}
		1254
		1255	bool
		1256	_destroy (SV *coro_sv)
		1257	CODE:
		1258	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1259	OUTPUT:
		1260	RETVAL
1014		1261
1015	void	1262	void
1016	DESTROY(coro)
1017	Coro::State coro
1018	CODE:
1019
1020	if (coro->mainstack && coro->mainstack != main_mainstack)
1021	{
1022	struct coro temp;
1023
1024	PUTBACK;
1025	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1026	LOAD (aTHX_ coro);
1027	SPAGAIN;
1028
1029	destroy_stacks (aTHX);
1030
1031	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1032	SPAGAIN;
1033
1034	coro->mainstack = 0;
1035	}
1036
1037	deallocate_stack (coro);
1038	SvREFCNT_dec (coro->args);
1039	Safefree (coro);
1040
1041	void
1042	_exit(code)	1263	_exit (code)
1043	int code	1264	int code
1044	PROTOTYPE: $	1265	PROTOTYPE: $
1045	CODE:	1266	CODE:
1046	_exit (code);	1267	_exit (code);
1047		1268
1048	MODULE = Coro::State PACKAGE = Coro::Cont	1269	int
		1270	cctx_stacksize (int new_stacksize = 0)
		1271	CODE:
		1272	RETVAL = coro_stacksize;
		1273	if (new_stacksize)
		1274	coro_stacksize = new_stacksize;
		1275	OUTPUT:
		1276	RETVAL
1049		1277
1050	# this is slightly dirty (should expose a c-level api)	1278	int
		1279	cctx_count ()
		1280	CODE:
		1281	RETVAL = cctx_count;
		1282	OUTPUT:
		1283	RETVAL
1051		1284
1052	void	1285	int
1053	yield(...)	1286	cctx_idle ()
1054	PROTOTYPE: @	1287	CODE:
1055	CODE:	1288	RETVAL = cctx_idle;
1056	static SV *returnstk;	1289	OUTPUT:
1057	SV *sv;	1290	RETVAL
1058	AV *defav = GvAV (PL_defgv);
1059	struct coro prev, next;
1060
1061	if (!returnstk)
1062	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1063
1064	/* set up @_ -- ugly */
1065	av_clear (defav);
1066	av_fill (defav, items - 1);
1067	while (items--)
1068	av_store (defav, items, SvREFCNT_inc (ST(items)));
1069
1070	SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1071	sv = av_pop ((AV *)SvRV (returnstk));
1072	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
1073	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
1074	SvREFCNT_dec (sv);
1075
1076	transfer (aTHX_ prev, next, 0);
1077		1291
1078	MODULE = Coro::State PACKAGE = Coro	1292	MODULE = Coro::State PACKAGE = Coro
1079		1293
1080	# this is slightly dirty (should expose a c-level api)
1081
1082	BOOT:	1294	BOOT:
1083	{	1295	{
1084	int i;	1296	int i;
		1297
1085	HV *stash = gv_stashpv ("Coro", TRUE);	1298	coro_stash = gv_stashpv ("Coro", TRUE);
1086		1299
1087	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1300	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1088	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1301	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1089	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1302	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1090	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1303	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1091	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1304	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1092	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1305	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1093		1306
1094	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1307	coro_current = get_sv ("Coro::current", FALSE);
1095	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1308	SvREADONLY_on (coro_current);
1096		1309
1097	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1310	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1098	coro_ready[i] = newAV ();	1311	coro_ready[i] = newAV ();
1099		1312
1100	{	1313	{
1101	SV *sv = perl_get_sv("Coro::API", 1);	1314	SV *sv = perl_get_sv("Coro::API", 1);
1102		1315
1103	coroapi.schedule = api_schedule;	1316	coroapi.schedule = api_schedule;
		1317	coroapi.save = api_save;
1104	coroapi.cede = api_cede;	1318	coroapi.cede = api_cede;
		1319	coroapi.cede_notself = api_cede_notself;
1105	coroapi.ready = api_ready;	1320	coroapi.ready = api_ready;
		1321	coroapi.is_ready = api_is_ready;
1106	coroapi.nready = &coro_nready;	1322	coroapi.nready = &coro_nready;
1107	coroapi.current = coro_current;	1323	coroapi.current = coro_current;
1108		1324
1109	GCoroAPI = &coroapi;	1325	GCoroAPI = &coroapi;
1110	sv_setiv(sv, (IV)&coroapi);	1326	sv_setiv (sv, (IV)&coroapi);
1111	SvREADONLY_on(sv);	1327	SvREADONLY_on (sv);
1112	}	1328	}
1113	}	1329	}
1114		1330
1115	#if !PERL_MICRO
1116
1117	void	1331	void
1118	ready(self)	1332	_set_current (SV *current)
1119	SV * self
1120	PROTOTYPE: $	1333	PROTOTYPE: $
1121	CODE:	1334	CODE:
1122	api_ready (self);	1335	SvREFCNT_dec (SvRV (coro_current));
1123		1336	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1124	#endif
1125		1337
1126	int	1338	int
		1339	prio (Coro::State coro, int newprio = 0)
		1340	ALIAS:
		1341	nice = 1
		1342	CODE:
		1343	{
		1344	RETVAL = coro->prio;
		1345
		1346	if (items > 1)
		1347	{
		1348	if (ix)
		1349	newprio = coro->prio - newprio;
		1350
		1351	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1352	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1353
		1354	coro->prio = newprio;
		1355	}
		1356	}
		1357	OUTPUT:
		1358	RETVAL
		1359
		1360	SV *
		1361	ready (SV *self)
		1362	PROTOTYPE: $
		1363	CODE:
		1364	RETVAL = boolSV (api_ready (self));
		1365	OUTPUT:
		1366	RETVAL
		1367
		1368	SV *
		1369	is_ready (SV *self)
		1370	PROTOTYPE: $
		1371	CODE:
		1372	RETVAL = boolSV (api_is_ready (self));
		1373	OUTPUT:
		1374	RETVAL
		1375
		1376	int
1127	nready(...)	1377	nready (...)
1128	PROTOTYPE:	1378	PROTOTYPE:
1129	CODE:	1379	CODE:
1130	RETVAL = coro_nready;	1380	RETVAL = coro_nready;
1131	OUTPUT:	1381	OUTPUT:
1132	RETVAL	1382	RETVAL
1133		1383
		1384	MODULE = Coro::State PACKAGE = Coro::AIO
		1385
		1386	SV *
		1387	_get_state ()
		1388	CODE:
		1389	{
		1390	struct io_state *data;
		1391
		1392	RETVAL = newSV (sizeof (struct io_state));
		1393	data = (struct io_state *)SvPVX (RETVAL);
		1394	SvCUR_set (RETVAL, sizeof (struct io_state));
		1395	SvPOK_only (RETVAL);
		1396
		1397	data->errorno = errno;
		1398	data->laststype = PL_laststype;
		1399	data->laststatval = PL_laststatval;
		1400	data->statcache = PL_statcache;
		1401	}
		1402	OUTPUT:
		1403	RETVAL
		1404
1134	void	1405	void
1135	schedule(...)	1406	_set_state (char *data_)
1136	PROTOTYPE:	1407	PROTOTYPE: $
1137	CODE:	1408	CODE:
1138	api_schedule ();	1409	{
		1410	struct io_state data = (void )data_;
1139		1411
1140	void	1412	errno = data->errorno;
1141	cede(...)	1413	PL_laststype = data->laststype;
1142	PROTOTYPE:	1414	PL_laststatval = data->laststatval;
1143	CODE:	1415	PL_statcache = data->statcache;
1144	api_cede ();	1416	}
1145		1417

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Comparing Coro/Coro/State.xs (file contents): Revision 1.62 by root, Tue Feb 22 19:51:58 2005 UTC vs. Revision 1.146 by root, Sat Mar 17 19:51:57 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.62 by root, Tue Feb 22 19:51:58 2005 UTC vs.
Revision 1.146 by root, Sat Mar 17 19:51:57 2007 UTC