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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.48 by pcg, Sat Nov 15 03:53:37 2003 UTC vs.
Revision 1.142 by root, Tue Feb 13 19:21:29 2007 UTC

…		…
		1	#include "libcoro/coro.c"
		2
1	#include "EXTERN.h"	3	#include "EXTERN.h"
2	#include "perl.h"	4	#include "perl.h"
3	#include "XSUB.h"	5	#include "XSUB.h"
4		6
5	#include "patchlevel.h"	7	#include "patchlevel.h"
6		8
7	#if PATCHLEVEL < 6	9	#include <stdio.h>
		10	#include <errno.h>
		11	#include <assert.h>
		12
		13	#ifdef HAVE_MMAP
		14	# include <unistd.h>
		15	# include <sys/mman.h>
		16	# ifndef MAP_ANONYMOUS
		17	# ifdef MAP_ANON
		18	# define MAP_ANONYMOUS MAP_ANON
		19	# else
		20	# undef HAVE_MMAP
		21	# endif
		22	# endif
		23	# include <limits.h>
		24	# ifndef PAGESIZE
		25	# define PAGESIZE pagesize
		26	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		27	static long pagesize;
		28	# else
		29	# define BOOT_PAGESIZE (void)0
		30	# endif
		31	#else
		32	# define PAGESIZE 0
		33	# define BOOT_PAGESIZE (void)0
		34	#endif
		35
		36	#if USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		39	#else
		40	# define REGISTER_STACK(cctx,start,end)
		41	#endif
		42
		43	/* the maximum number of idle cctx that will be pooled */
		44	#define MAX_IDLE_CCTX 8
		45
		46	#define PERL_VERSION_ATLEAST(a,b,c) \
		47	(PERL_REVISION > (a) \
		48	\|\| (PERL_REVISION == (a) \
		49	&& (PERL_VERSION > (b) \
		50	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		51
		52	#if !PERL_VERSION_ATLEAST (5,6,0)
8	# ifndef PL_ppaddr	53	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	54	# define PL_ppaddr ppaddr
10	# endif	55	# endif
11	# ifndef call_sv	56	# ifndef call_sv
12	# define call_sv perl_call_sv	57	# define call_sv perl_call_sv
23	# ifndef IS_PADCONST	68	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	69	# define IS_PADCONST(v) 0
25	# endif	70	# endif
26	#endif	71	#endif
27		72
28	#include "libcoro/coro.c"	73	/* 5.8.7 */
29		74	#ifndef SvRV_set
30	#include <signal.h>	75	# 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	76	#endif
42	#endif
43		77
44	#define MAY_FLUSH /* increases codesize and is rarely used */	78	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		79	# undef STACKGUARD
		80	#endif
45		81
46	#define SUB_INIT "Coro::State::initialize"	82	#ifndef STACKGUARD
47	#define UCORO_STATE "_coro_state"	83	# define STACKGUARD 0
		84	#endif
		85
		86	/* prefer perl internal functions over our own? */
		87	#ifndef PREFER_PERL_FUNCTIONS
		88	# define PREFER_PERL_FUNCTIONS 0
		89	#endif
48		90
49	/* The next macro should declare a variable stacklevel that contains and approximation	91	/* The next macro should declare a variable stacklevel that contains and approximation
50	* to the current C stack pointer. Its property is that it changes with each call	92	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	93	* and should be unique. */
		94	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	95	#define STACKLEVEL ((void *)&stacklevel)
53		96
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	97	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		98
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	99	#if __GNUC__ >= 3
		100	# define attribute(x) __attribute__(x)
		101	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		102	#else
		103	# define attribute(x)
		104	# define BARRIER
		105	#endif
		106
		107	#define NOINLINE attribute ((noinline))
57		108
58	#include "CoroAPI.h"	109	#include "CoroAPI.h"
59		110
		111	#ifdef USE_ITHREADS
		112	static perl_mutex coro_mutex;
		113	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		114	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		115	#else
		116	# define LOCK (void)0
		117	# define UNLOCK (void)0
		118	#endif
		119
		120	/* helper storage struct for Coro::AIO */
		121	struct io_state
		122	{
		123	int errorno;
		124	I32 laststype;
		125	int laststatval;
		126	Stat_t statcache;
		127	};
		128
60	static struct CoroAPI coroapi;	129	static struct CoroAPI coroapi;
		130	static AV main_mainstack; / used to differentiate between $main and others */
		131	static HV coro_state_stash, coro_stash;
		132	static SV coro_mortal; / will be freed after next transfer */
61		133
62	/* this is actually not only the c stack but also c registers etc... */	134	static struct coro_cctx *cctx_first;
		135	static int cctx_count, cctx_idle;
		136
		137	/* this is a structure representing a c-level coroutine */
63	typedef struct {	138	typedef struct coro_cctx {
64	int refcnt; /* pointer reference counter */	139	struct coro_cctx *next;
65	int usecnt; /* shared by how many coroutines */
66	int gencnt; /* generation counter */
67		140
		141	/* the stack */
		142	void *sptr;
		143	ssize_t ssize; /* positive == mmap, otherwise malloc */
		144
		145	/* cpu state */
		146	void idle_sp; / sp of top-level transfer/schedule/cede call */
		147	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		148	JMPENV *top_env;
68	coro_context cctx;	149	coro_context cctx;
69		150
70	void *sptr;	151	int inuse;
71	long ssize; /* positive == mmap, otherwise malloc */
72	} coro_stack;
73		152
		153	#if USE_VALGRIND
		154	int valgrind_id;
		155	#endif
		156	} coro_cctx;
		157
		158	enum {
		159	CF_RUNNING = 0x0001, /* coroutine is running */
		160	CF_READY = 0x0002, /* coroutine is ready */
		161	CF_NEW = 0x0004, /* has never been switched to */
		162	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		163	};
		164
		165	/* this is a structure representing a perl-level coroutine */
74	struct coro {	166	struct coro {
75	/* the top-level JMPENV for each coroutine, needed to catch dies. */	167	/* the c coroutine allocated to this perl coroutine, if any */
76	JMPENV start_env;	168	coro_cctx *cctx;
77
78	/* the optional C context */
79	coro_stack *stack;
80	void *cursp;
81	int gencnt;
82
83	/* optionally saved, might be zero */
84	AV *defav;
85	SV *defsv;
86	SV *errsv;
87
88	/* saved global state not related to stacks */
89	U8 dowarn;
90	I32 in_eval;
91
92	/* the stacks and related info (callchain etc..) */
93	PERL_SI *curstackinfo;
94	AV *curstack;
95	AV *mainstack;
96	SV **stack_sp;
97	OP *op;
98	SV **curpad;
99	AV *comppad;
100	SV **stack_base;
101	SV **stack_max;
102	SV **tmps_stack;
103	I32 tmps_floor;
104	I32 tmps_ix;
105	I32 tmps_max;
106	I32 *markstack;
107	I32 *markstack_ptr;
108	I32 *markstack_max;
109	I32 *scopestack;
110	I32 scopestack_ix;
111	I32 scopestack_max;
112	ANY *savestack;
113	I32 savestack_ix;
114	I32 savestack_max;
115	OP **retstack;
116	I32 retstack_ix;
117	I32 retstack_max;
118	COP *curcop;
119	JMPENV *top_env;
120		169
121	/* data associated with this coroutine (initial args) */	170	/* data associated with this coroutine (initial args) */
122	AV *args;	171	AV *args;
		172	int refcnt;
		173	int save; /* CORO_SAVE flags */
		174	int flags; /* CF_ flags */
		175
		176	/* optionally saved, might be zero */
		177	AV defav; / @_ */
		178	SV defsv; / $_ */
		179	SV errsv; / $@ */
		180	SV irssv; / $/ */
		181	SV irssv_sv; / real $/ cache */
		182
		183	#define VAR(name,type) type name;
		184	# include "state.h"
		185	#undef VAR
		186
		187	/* coro process data */
		188	int prio;
123	};	189	};
124		190
125	typedef struct coro *Coro__State;	191	typedef struct coro *Coro__State;
126	typedef struct coro *Coro__State_or_hashref;	192	typedef struct coro *Coro__State_or_hashref;
127		193
128	static AV main_mainstack; / used to differentiate between $main and others */	194	/ Coro ******************************************************************/
129	static HV *coro_state_stash;
130	static SV *ucoro_state_sv;
131	static U32 ucoro_state_hash;
132	static HV *padlist_cache;
133	static SV coro_mortal; / will be freed after next transfer */
134		195
135	/* mostly copied from op.c:cv_clone2 */	196	#define PRIO_MAX 3
136	STATIC AV *	197	#define PRIO_HIGH 1
137	clone_padlist (AV *protopadlist)	198	#define PRIO_NORMAL 0
		199	#define PRIO_LOW -1
		200	#define PRIO_IDLE -3
		201	#define PRIO_MIN -4
		202
		203	/* for Coro.pm */
		204	static SV *coro_current;
		205	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		206	static int coro_nready;
		207
		208	/ lowlevel stuff ********************************************************/
		209
		210	static AV *
		211	coro_clone_padlist (CV *cv)
138	{	212	{
139	AV *av;	213	AV *padlist = CvPADLIST (cv);
140	I32 ix;
141	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
142	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
143	SV **pname = AvARRAY (protopad_name);
144	SV **ppad = AvARRAY (protopad);
145	I32 fname = AvFILLp (protopad_name);
146	I32 fpad = AvFILLp (protopad);
147	AV newpadlist, newpad_name, *newpad;	214	AV newpadlist, newpad;
148	SV **npad;
149
150	newpad_name = newAV ();
151	for (ix = fname; ix >= 0; ix--)
152	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
153
154	newpad = newAV ();
155	av_fill (newpad, AvFILLp (protopad));
156	npad = AvARRAY (newpad);
157		215
158	newpadlist = newAV ();	216	newpadlist = newAV ();
159	AvREAL_off (newpadlist);	217	AvREAL_off (newpadlist);
160	av_store (newpadlist, 0, (SV *) newpad_name);	218	#if PERL_VERSION_ATLEAST (5,9,0)
		219	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		220	#else
		221	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		222	#endif
		223	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		224	--AvFILLp (padlist);
		225
		226	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
161	av_store (newpadlist, 1, (SV *) newpad);	227	av_store (newpadlist, 1, (SV *)newpad);
162		228
163	av = newAV (); /* will be @_ */	229	return newpadlist;
164	av_extend (av, 0);	230	}
165	av_store (newpad, 0, (SV *) av);
166	AvFLAGS (av) = AVf_REIFY;
167		231
168	for (ix = fpad; ix > 0; ix--)	232	static void
		233	free_padlist (AV *padlist)
		234	{
		235	/* may be during global destruction */
		236	if (SvREFCNT (padlist))
169	{	237	{
170	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	238	I32 i = AvFILLp (padlist);
171	if (namesv && namesv != &PL_sv_undef)	239	while (i >= 0)
172	{	240	{
173	char name = SvPVX (namesv); / XXX */	241	SV **svp = av_fetch (padlist, i--, FALSE);
174	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')	242	if (svp)
175	{ /* lexical from outside? */
176	npad[ix] = SvREFCNT_inc (ppad[ix]);
177	}	243	{
178	else
179	{ /* our own lexical */
180	SV *sv;	244	SV *sv;
181	if (*name == '&')	245	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
182	sv = SvREFCNT_inc (ppad[ix]);	246	SvREFCNT_dec (sv);
183	else if (*name == '@')	247
184	sv = (SV *) newAV ();	248	SvREFCNT_dec (*svp);
185	else if (*name == '%')
186	sv = (SV *) newHV ();
187	else
188	sv = NEWSV (0, 0);
189	if (!SvPADBUSY (sv))
190	SvPADMY_on (sv);
191	npad[ix] = sv;
192	}	249	}
193	}	250	}
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		251
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
226	return newpadlist;
227	}
228
229	#ifdef MAY_FLUSH
230	STATIC void
231	free_padlist (AV *padlist)
232	{
233	/* may be during global destruction */
234	if (SvREFCNT(padlist))
235	{
236	I32 i = AvFILLp(padlist);
237	while (i >= 0)
238	{
239	SV **svp = av_fetch(padlist, i--, FALSE);
240	SV sv = svp ? svp : Nullsv;
241	if (sv)
242	SvREFCNT_dec(sv);
243	}
244
245	SvREFCNT_dec((SV*)padlist);	252	SvREFCNT_dec ((SV*)padlist);
246	}	253	}
247	}	254	}
248	#endif	255
		256	static int
		257	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		258	{
		259	AV *padlist;
		260	AV av = (AV )mg->mg_obj;
		261
		262	/* casting is fun. */
		263	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		264	free_padlist (padlist);
		265
		266	SvREFCNT_dec (av);
		267
		268	return 0;
		269	}
		270
		271	#define PERL_MAGIC_coro PERL_MAGIC_ext
		272
		273	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		274
		275	#define CORO_MAGIC(cv) \
		276	SvMAGIC (cv) \
		277	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		278	? SvMAGIC (cv) \
		279	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		280	: 0
249		281
250	/* the next two functions merely cache the padlists */	282	/* the next two functions merely cache the padlists */
251	STATIC void	283	static void
252	get_padlist (CV *cv)	284	get_padlist (CV *cv)
253	{	285	{
254	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);	286	MAGIC *mg = CORO_MAGIC (cv);
		287	AV *av;
255		288
256	if (he && AvFILLp ((AV )he) >= 0)	289	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
257	CvPADLIST (cv) = (AV )av_pop ((AV )*he);	290	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
258	else	291	else
		292	{
		293	#if PREFER_PERL_FUNCTIONS
		294	/* this is probably cleaner, but also slower? */
		295	CV *cp = Perl_cv_clone (cv);
		296	CvPADLIST (cv) = CvPADLIST (cp);
		297	CvPADLIST (cp) = 0;
		298	SvREFCNT_dec (cp);
		299	#else
259	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	300	CvPADLIST (cv) = coro_clone_padlist (cv);
		301	#endif
		302	}
260	}	303	}
261		304
262	STATIC void	305	static void
263	put_padlist (CV *cv)	306	put_padlist (CV *cv)
264	{	307	{
265	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);	308	MAGIC *mg = CORO_MAGIC (cv);
		309	AV *av;
266		310
267	if (SvTYPE (*he) != SVt_PVAV)	311	if (!mg)
268	{
269	SvREFCNT_dec (*he);
270	he = (SV )newAV ();
271	}	312	{
272		313	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
273	av_push ((AV )he, (SV *)CvPADLIST (cv));	314	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
274	}	315	mg->mg_virtual = &vtbl_coro;
275		316	mg->mg_obj = (SV *)newAV ();
276	#ifdef MAY_FLUSH
277	STATIC void
278	flush_padlist_cache ()
279	{
280	HV *hv = padlist_cache;
281	padlist_cache = newHV ();
282
283	if (hv_iterinit (hv))
284	{	317	}
285	HE *he;
286	AV *padlist;
287		318
288	while (!!(he = hv_iternext (hv)))	319	av = (AV *)mg->mg_obj;
289	{
290	AV av = (AV )HeVAL(he);
291		320
292	/* casting is fun. */	321	if (AvFILLp (av) >= AvMAX (av))
293	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	322	av_extend (av, AvMAX (av) + 1);
294	free_padlist (padlist);
295	}
296	}
297		323
298	SvREFCNT_dec (hv);	324	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
299	}	325	}
300	#endif	326
		327	/ load & save, init *****************************************************/
301		328
302	#define SB do {	329	#define SB do {
303	#define SE } while (0)	330	#define SE } while (0)
304		331
305	#define LOAD(state) load_state(aTHX_ (state));
306	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
307
308	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	332	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
309		333
310	static void	334	static void
311	load_state(pTHX_ Coro__State c)	335	load_perl (Coro__State c)
312	{	336	{
313	PL_dowarn = c->dowarn;	337	#define VAR(name,type) PL_ ## name = c->name;
314	PL_in_eval = c->in_eval;	338	# include "state.h"
315		339	#undef VAR
316	PL_curstackinfo = c->curstackinfo;
317	PL_curstack = c->curstack;
318	PL_mainstack = c->mainstack;
319	PL_stack_sp = c->stack_sp;
320	PL_op = c->op;
321	PL_curpad = c->curpad;
322	PL_comppad = c->comppad;
323	PL_stack_base = c->stack_base;
324	PL_stack_max = c->stack_max;
325	PL_tmps_stack = c->tmps_stack;
326	PL_tmps_floor = c->tmps_floor;
327	PL_tmps_ix = c->tmps_ix;
328	PL_tmps_max = c->tmps_max;
329	PL_markstack = c->markstack;
330	PL_markstack_ptr = c->markstack_ptr;
331	PL_markstack_max = c->markstack_max;
332	PL_scopestack = c->scopestack;
333	PL_scopestack_ix = c->scopestack_ix;
334	PL_scopestack_max = c->scopestack_max;
335	PL_savestack = c->savestack;
336	PL_savestack_ix = c->savestack_ix;
337	PL_savestack_max = c->savestack_max;
338	PL_retstack = c->retstack;
339	PL_retstack_ix = c->retstack_ix;
340	PL_retstack_max = c->retstack_max;
341	PL_curcop = c->curcop;
342	PL_top_env = c->top_env;
343		340
344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	341	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	342	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
346	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	343	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		344	if (c->irssv)
		345	{
		346	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
		347	SvREFCNT_dec (c->irssv);
		348	else
		349	{
		350	REPLACE_SV (PL_rs, c->irssv);
		351	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		352	sv_setsv (c->irssv_sv, PL_rs);
		353	}
		354	}
347		355
348	{	356	{
349	dSP;	357	dSP;
350	CV *cv;	358	CV *cv;
351		359
352	/* now do the ugly restore mess */	360	/* now do the ugly restore mess */
353	while ((cv = (CV *)POPs))	361	while ((cv = (CV *)POPs))
354	{	362	{
355	AV padlist = (AV )POPs;
356
357	if (padlist)
358	{
359	put_padlist (cv); /* mark this padlist as available */	363	put_padlist (cv); /* mark this padlist as available */
360	CvPADLIST(cv) = padlist;	364	CvDEPTH (cv) = PTR2IV (POPs);
361	#ifdef USE_THREADS	365	CvPADLIST (cv) = (AV *)POPs;
362	/CvOWNER(cv) = (struct perl_thread )POPs;*/
363	#endif
364	}
365
366	++CvDEPTH(cv);
367	}	366	}
368		367
369	PUTBACK;	368	PUTBACK;
370	}	369	}
		370	assert (!PL_comppad \|\| AvARRAY (PL_comppad));//D
371	}	371	}
372		372
373	static void	373	static void
374	save_state(pTHX_ Coro__State c, int flags)	374	save_perl (Coro__State c)
375	{	375	{
		376	assert (!PL_comppad \|\| AvARRAY (PL_comppad));//D
376	{	377	{
377	dSP;	378	dSP;
378	I32 cxix = cxstack_ix;	379	I32 cxix = cxstack_ix;
379	PERL_CONTEXT *ccstk = cxstack;	380	PERL_CONTEXT *ccstk = cxstack;
380	PERL_SI *top_si = PL_curstackinfo;	381	PERL_SI *top_si = PL_curstackinfo;
…		…
382	/*	383	/*
383	* the worst thing you can imagine happens first - we have to save	384	* the worst thing you can imagine happens first - we have to save
384	* (and reinitialize) all cv's in the whole callchain :(	385	* (and reinitialize) all cv's in the whole callchain :(
385	*/	386	*/
386		387
		388	EXTEND (SP, 3 + 1);
387	PUSHs (Nullsv);	389	PUSHs (Nullsv);
388	/* this loop was inspired by pp_caller */	390	/* this loop was inspired by pp_caller */
389	for (;;)	391	for (;;)
390	{	392	{
391	while (cxix >= 0)	393	while (cxix >= 0)
392	{	394	{
393	PERL_CONTEXT *cx = &ccstk[cxix--];	395	PERL_CONTEXT *cx = &ccstk[cxix--];
394		396
395	if (CxTYPE(cx) == CXt_SUB)	397	if (CxTYPE (cx) == CXt_SUB)
396	{	398	{
397	CV *cv = cx->blk_sub.cv;	399	CV *cv = cx->blk_sub.cv;
		400
398	if (CvDEPTH(cv))	401	if (CvDEPTH (cv))
399	{	402	{
400	#ifdef USE_THREADS
401	/XPUSHs ((SV )CvOWNER(cv));*/
402	/CvOWNER(cv) = 0;/
403	/error must unlock this cv etc.. etc.../
404	#endif
405	EXTEND (SP, CvDEPTH(cv)*2);	403	EXTEND (SP, 3);
406
407	while (--CvDEPTH(cv))
408	{
409	/* this tells the restore code to increment CvDEPTH */
410	PUSHs (Nullsv);
411	PUSHs ((SV *)cv);
412	}
413
414	PUSHs ((SV *)CvPADLIST(cv));	404	PUSHs ((SV *)CvPADLIST (cv));
		405	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
415	PUSHs ((SV *)cv);	406	PUSHs ((SV *)cv);
416		407
		408	CvDEPTH (cv) = 0;
417	get_padlist (cv); /* this is a monster */	409	get_padlist (cv);
418	}	410	}
419	}	411	}
420	#ifdef CXt_FORMAT
421	else if (CxTYPE(cx) == CXt_FORMAT)
422	{
423	/* I never used formats, so how should I know how these are implemented? */
424	/* my bold guess is as a simple, plain sub... */
425	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
426	}
427	#endif
428	}	412	}
429		413
430	if (top_si->si_type == PERLSI_MAIN)	414	if (top_si->si_type == PERLSI_MAIN)
431	break;	415	break;
432		416
…		…
436	}	420	}
437		421
438	PUTBACK;	422	PUTBACK;
439	}	423	}
440		424
441	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	425	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
442	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	426	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
443	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	427	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		428	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
444		429
445	c->dowarn = PL_dowarn;	430	#define VAR(name,type)c->name = PL_ ## name;
446	c->in_eval = PL_in_eval;	431	# include "state.h"
447		432	#undef VAR
448	c->curstackinfo = PL_curstackinfo;
449	c->curstack = PL_curstack;
450	c->mainstack = PL_mainstack;
451	c->stack_sp = PL_stack_sp;
452	c->op = PL_op;
453	c->curpad = PL_curpad;
454	c->comppad = PL_comppad;
455	c->stack_base = PL_stack_base;
456	c->stack_max = PL_stack_max;
457	c->tmps_stack = PL_tmps_stack;
458	c->tmps_floor = PL_tmps_floor;
459	c->tmps_ix = PL_tmps_ix;
460	c->tmps_max = PL_tmps_max;
461	c->markstack = PL_markstack;
462	c->markstack_ptr = PL_markstack_ptr;
463	c->markstack_max = PL_markstack_max;
464	c->scopestack = PL_scopestack;
465	c->scopestack_ix = PL_scopestack_ix;
466	c->scopestack_max = PL_scopestack_max;
467	c->savestack = PL_savestack;
468	c->savestack_ix = PL_savestack_ix;
469	c->savestack_max = PL_savestack_max;
470	c->retstack = PL_retstack;
471	c->retstack_ix = PL_retstack_ix;
472	c->retstack_max = PL_retstack_max;
473	c->curcop = PL_curcop;
474	c->top_env = PL_top_env;
475	}	433	}
476		434
477	/*	435	/*
478	* allocate various perl stacks. This is an exact copy	436	* allocate various perl stacks. This is an exact copy
479	* of perl.c:init_stacks, except that it uses less memory	437	* of perl.c:init_stacks, except that it uses less memory
480	* on the assumption that coroutines do not usually need	438	* on the (sometimes correct) assumption that coroutines do
481	* a lot of stackspace.	439	* not usually need a lot of stackspace.
482	*/	440	*/
483	STATIC void	441	#if PREFER_PERL_FUNCTIONS
		442	# define coro_init_stacks init_stacks
		443	#else
		444	static void
484	coro_init_stacks (pTHX)	445	coro_init_stacks ()
485	{	446	{
486	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	447	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
487	PL_curstackinfo->si_type = PERLSI_MAIN;	448	PL_curstackinfo->si_type = PERLSI_MAIN;
488	PL_curstack = PL_curstackinfo->si_stack;	449	PL_curstack = PL_curstackinfo->si_stack;
489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
490		451
491	PL_stack_base = AvARRAY(PL_curstack);	452	PL_stack_base = AvARRAY(PL_curstack);
492	PL_stack_sp = PL_stack_base;	453	PL_stack_sp = PL_stack_base;
493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
494		455
495	New(50,PL_tmps_stack,96,SV*);	456	New(50,PL_tmps_stack,128,SV*);
496	PL_tmps_floor = -1;	457	PL_tmps_floor = -1;
497	PL_tmps_ix = -1;	458	PL_tmps_ix = -1;
498	PL_tmps_max = 96;	459	PL_tmps_max = 128;
499		460
500	New(54,PL_markstack,16,I32);	461	New(54,PL_markstack,32,I32);
501	PL_markstack_ptr = PL_markstack;	462	PL_markstack_ptr = PL_markstack;
502	PL_markstack_max = PL_markstack + 16;	463	PL_markstack_max = PL_markstack + 32;
503		464
504	#ifdef SET_MARK_OFFSET	465	#ifdef SET_MARK_OFFSET
505	SET_MARK_OFFSET;	466	SET_MARK_OFFSET;
506	#endif	467	#endif
507		468
508	New(54,PL_scopestack,16,I32);	469	New(54,PL_scopestack,32,I32);
509	PL_scopestack_ix = 0;	470	PL_scopestack_ix = 0;
510	PL_scopestack_max = 16;	471	PL_scopestack_max = 32;
511		472
512	New(54,PL_savestack,96,ANY);	473	New(54,PL_savestack,64,ANY);
513	PL_savestack_ix = 0;	474	PL_savestack_ix = 0;
514	PL_savestack_max = 96;	475	PL_savestack_max = 64;
515		476
		477	#if !PERL_VERSION_ATLEAST (5,9,0)
516	New(54,PL_retstack,8,OP*);	478	New(54,PL_retstack,16,OP*);
517	PL_retstack_ix = 0;	479	PL_retstack_ix = 0;
518	PL_retstack_max = 8;	480	PL_retstack_max = 16;
		481	#endif
519	}	482	}
		483	#endif
520		484
521	/*	485	/*
522	* destroy the stacks, the callchain etc...	486	* destroy the stacks, the callchain etc...
523	*/	487	*/
524	STATIC void	488	static void
525	destroy_stacks(pTHX)	489	coro_destroy_stacks ()
526	{	490	{
527	if (!IN_DESTRUCT)	491	if (!IN_DESTRUCT)
528	{	492	{
529	/* is this ugly, I ask? */	493	/* restore all saved variables and stuff */
530	while (PL_scopestack_ix)	494	LEAVE_SCOPE (0);
531	LEAVE;	495	assert (PL_tmps_floor == -1);
532		496
533	/* sure it is, but more important: is it correct?? :/ */	497	/* free all temporaries */
534	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
535	FREETMPS;	498	FREETMPS;
		499	assert (PL_tmps_ix == -1);
		500
		501	/* unwind all extra stacks */
		502	POPSTACK_TO (PL_mainstack);
		503
		504	/* unwind main stack */
		505	dounwind (-1);
536	}	506	}
537		507
538	while (PL_curstackinfo->si_next)	508	while (PL_curstackinfo->si_next)
539	PL_curstackinfo = PL_curstackinfo->si_next;	509	PL_curstackinfo = PL_curstackinfo->si_next;
540		510
541	while (PL_curstackinfo)	511	while (PL_curstackinfo)
542	{	512	{
543	PERL_SI *p = PL_curstackinfo->si_prev;	513	PERL_SI *p = PL_curstackinfo->si_prev;
544		514
545	{
546	dSP;
547	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
548	PUTBACK; /* possibly superfluous */
549	}
550
551	if (!IN_DESTRUCT)	515	if (!IN_DESTRUCT)
552	{
553	dounwind(-1);
554	SvREFCNT_dec(PL_curstackinfo->si_stack);	516	SvREFCNT_dec (PL_curstackinfo->si_stack);
555	}
556		517
557	Safefree(PL_curstackinfo->si_cxstack);	518	Safefree (PL_curstackinfo->si_cxstack);
558	Safefree(PL_curstackinfo);	519	Safefree (PL_curstackinfo);
559	PL_curstackinfo = p;	520	PL_curstackinfo = p;
560	}	521	}
561		522
562	Safefree(PL_tmps_stack);	523	Safefree (PL_tmps_stack);
563	Safefree(PL_markstack);	524	Safefree (PL_markstack);
564	Safefree(PL_scopestack);	525	Safefree (PL_scopestack);
565	Safefree(PL_savestack);	526	Safefree (PL_savestack);
		527	#if !PERL_VERSION_ATLEAST (5,9,0)
566	Safefree(PL_retstack);	528	Safefree (PL_retstack);
567	}
568
569	static void
570	allocate_stack (Coro__State ctx, int alloc)
571	{
572	coro_stack *stack;
573
574	New (0, stack, 1, coro_stack);
575
576	stack->refcnt = 1;
577	stack->usecnt = 1;
578	stack->gencnt = ctx->gencnt = 0;
579	if (alloc)
580	{
581	#if HAVE_MMAP
582	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
583	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
584	if (stack->sptr == (void *)-1)
585	#endif	529	#endif
586	{
587	/FIXME//D//* reasonable stack size! */
588	stack->ssize = -4096 * sizeof (long);
589	New (0, stack->sptr, 4096, long);
590	}
591	}
592	else
593	stack->sptr = 0;
594
595	ctx->stack = stack;
596	}	530	}
597		531
598	static void	532	/ coroutine stack handling **********************************************/
599	deallocate_stack (Coro__State ctx)
600	{
601	coro_stack *stack = ctx->stack;
602		533
603	ctx->stack = 0;
604
605	if (stack)
606	{
607	if (!--stack->refcnt)
608	{
609	#ifdef HAVE_MMAP
610	if (stack->ssize > 0 && stack->sptr)
611	munmap (stack->sptr, stack->ssize);
612	else
613	#endif
614	Safefree (stack->sptr);
615
616	Safefree (stack);
617	}
618	else if (ctx->gencnt == stack->gencnt)
619	--stack->usecnt;
620	}
621	}
622
623	static void	534	static void
624	setup_coro (void *arg)	535	setup_coro (struct coro *coro)
625	{	536	{
626	/*	537	/*
627	* emulate part of the perl startup here.	538	* emulate part of the perl startup here.
628	*/	539	*/
		540
		541	coro_init_stacks ();
		542
		543	PL_curcop = &PL_compiling;
		544	PL_in_eval = EVAL_NULL;
		545	PL_comppad = 0;
		546	PL_curpm = 0;
		547	PL_localizing = 0;
		548	PL_dirty = 0;
		549	PL_restartop = 0;
		550
		551	{
		552	dSP;
		553	LOGOP myop;
		554
		555	SvREFCNT_dec (GvAV (PL_defgv));
		556	GvAV (PL_defgv) = coro->args; coro->args = 0;
		557
		558	Zero (&myop, 1, LOGOP);
		559	myop.op_next = Nullop;
		560	myop.op_flags = OPf_WANT_VOID;
		561
		562	PUSHMARK (SP);
		563	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		564	PUTBACK;
		565	PL_op = (OP *)&myop;
		566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		567	SPAGAIN;
		568	}
		569
		570	ENTER; /* necessary e.g. for dounwind */
		571	}
		572
		573	static void
		574	free_coro_mortal ()
		575	{
		576	if (coro_mortal)
		577	{
		578	SvREFCNT_dec (coro_mortal);
		579	coro_mortal = 0;
		580	}
		581	}
		582
		583	/* inject a fake call to Coro::State::_cctx_init into the execution */
		584	static void NOINLINE
		585	prepare_cctx (coro_cctx *cctx)
		586	{
629	dSP;	587	dSP;
630	Coro__State ctx = (Coro__State)arg;	588	LOGOP myop;
631	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
632		589
633	coro_init_stacks (aTHX);	590	Zero (&myop, 1, LOGOP);
634	/PL_curcop = 0;/	591	myop.op_next = PL_op;
635	/PL_in_eval = PL_in_eval;/ /* inherit */	592	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
636	SvREFCNT_dec (GvAV (PL_defgv));
637	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
638		593
		594	PUSHMARK (SP);
		595	EXTEND (SP, 2);
		596	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		597	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		598	PUTBACK;
		599	PL_op = (OP *)&myop;
		600	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
639	SPAGAIN;	601	SPAGAIN;
640
641	if (ctx->stack)
642	{
643	ctx->cursp = 0;
644
645	PUSHMARK(SP);
646	PUTBACK;
647	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
648
649	if (SvTRUE (ERRSV))
650	croak (NULL);
651	else
652	croak ("FATAL: CCTXT coroutine returned!");
653	}
654	else
655	{
656	UNOP myop;
657
658	PL_op = (OP *)&myop;
659
660	Zero(&myop, 1, UNOP);
661	myop.op_next = Nullop;
662	myop.op_flags = OPf_WANT_VOID;
663
664	PUSHMARK(SP);
665	XPUSHs (sub_init);
666	/*
667	* the next line is slightly wrong, as PL_op->op_next
668	* is actually being executed so we skip the first op.
669	* that doesn't matter, though, since it is only
670	* pp_nextstate and we never return...
671	* ah yes, and I don't care anyways ;)
672	*/
673	PUTBACK;
674	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
675	SPAGAIN;
676
677	ENTER; /* necessary e.g. for dounwind */
678	}
679	}	602	}
680		603
681	static void	604	static void
682	continue_coro (void *arg)	605	coro_run (void *arg)
683	{	606	{
		607	/* coro_run is the alternative tail of transfer(), so unlock here. */
		608	UNLOCK;
		609
684	/*	610	/*
685	* this is a _very_ stripped down perl interpreter ;)	611	* this is a _very_ stripped down perl interpreter ;)
686	*/	612	*/
687	Coro__State ctx = (Coro__State)arg;
688	JMPENV coro_start_env;
689
690	PL_top_env = &ctx->start_env;	613	PL_top_env = &PL_start_env;
691		614
692	ctx->cursp = 0;	615	/* inject call to cctx_init */
693	PL_op = PL_op->op_next;	616	prepare_cctx ((coro_cctx *)arg);
694	CALLRUNOPS(aTHX);
695		617
		618	/* somebody will hit me for both perl_run and PL_restartop */
		619	PL_restartop = PL_op;
		620	perl_run (PL_curinterp);
		621
		622	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
696	abort ();	623	abort ();
697	}	624	}
698		625
699	STATIC void	626	static coro_cctx *
		627	cctx_new ()
		628	{
		629	coro_cctx *cctx;
		630
		631	++cctx_count;
		632
		633	Newz (0, cctx, 1, coro_cctx);
		634
		635	#if HAVE_MMAP
		636
		637	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		638	/* mmap supposedly does allocate-on-write for us */
		639	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		640
		641	if (cctx->sptr != (void *)-1)
		642	{
		643	# if STACKGUARD
		644	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		645	# endif
		646	REGISTER_STACK (
		647	cctx,
		648	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		649	cctx->ssize + (char *)cctx->sptr
		650	);
		651
		652	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		653	}
		654	else
		655	#endif
		656	{
		657	cctx->ssize = -STACKSIZE * (long)sizeof (long);
		658	New (0, cctx->sptr, STACKSIZE, long);
		659
		660	if (!cctx->sptr)
		661	{
		662	perror ("FATAL: unable to allocate stack for coroutine");
		663	_exit (EXIT_FAILURE);
		664	}
		665
		666	REGISTER_STACK (
		667	cctx,
		668	(char *)cctx->sptr,
		669	(char *)cctx->sptr - cctx->ssize
		670	);
		671
		672	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, -cctx->ssize);
		673	}
		674
		675	return cctx;
		676	}
		677
		678	static void
		679	cctx_destroy (coro_cctx *cctx)
		680	{
		681	if (!cctx)
		682	return;
		683
		684	--cctx_count;
		685
		686	#if USE_VALGRIND
		687	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		688	#endif
		689
		690	#if HAVE_MMAP
		691	if (cctx->ssize > 0)
		692	munmap (cctx->sptr, cctx->ssize);
		693	else
		694	#endif
		695	Safefree (cctx->sptr);
		696
		697	Safefree (cctx);
		698	}
		699
		700	static coro_cctx *
		701	cctx_get ()
		702	{
		703	coro_cctx *cctx;
		704
		705	if (cctx_first)
		706	{
		707	cctx = cctx_first;
		708	cctx_first = cctx->next;
		709	--cctx_idle;
		710	}
		711	else
		712	{
		713	cctx = cctx_new ();
		714	PL_op = PL_op->op_next;
		715	}
		716
		717	return cctx;
		718	}
		719
		720	static void
		721	cctx_put (coro_cctx *cctx)
		722	{
		723	/* free another cctx if overlimit */
		724	if (cctx_idle >= MAX_IDLE_CCTX)
		725	{
		726	coro_cctx *first = cctx_first;
		727	cctx_first = first->next;
		728	--cctx_idle;
		729
		730	assert (!first->inuse);
		731	cctx_destroy (first);
		732	}
		733
		734	++cctx_idle;
		735	cctx->next = cctx_first;
		736	cctx_first = cctx;
		737	}
		738
		739	/ coroutine switching ***************************************************/
		740
		741	/* never call directly, always through the coro_state_transfer global variable */
		742	static void NOINLINE
700	transfer(pTHX_ struct coro prev, struct coro next, int flags)	743	transfer (struct coro prev, struct coro next)
701	{	744	{
702	dSTACKLEVEL;	745	dSTACKLEVEL;
703	static struct coro *xnext;
704		746
		747	/* sometimes transfer is only called to set idle_sp */
		748	if (!next)
		749	{
		750	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		751	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		752	}
705	if (prev != next)	753	else if (prev != next)
706	{	754	{
707	xnext = next;	755	coro_cctx *prev__cctx;
708		756
709	if (next->mainstack)	757	if (prev->flags & CF_NEW)
710	{	758	{
711	SAVE (prev, flags);	759	/* create a new empty context */
712	LOAD (next);	760	Newz (0, prev->cctx, 1, coro_cctx);
713		761	prev->cctx->inuse = 1;
714	/* mark this state as in-use */	762	prev->flags &= ~CF_NEW;
715	next->mainstack = 0;	763	prev->flags \|= CF_RUNNING;
716	next->tmps_ix = -2;
717
718	/* stacklevel changed? if yes, grab the stack for us! */
719	if (flags & TRANSFER_SAVE_CCTXT)
720	{
721	if (!prev->stack)
722	allocate_stack (prev, 0);
723	else if (prev->cursp != stacklevel
724	&& prev->stack->usecnt > 1)
725	{
726	prev->gencnt = ++prev->stack->gencnt;
727	prev->stack->usecnt = 1;
728	}
729
730	/* has our stack been invalidated? */
731	if (next->stack && next->stack->gencnt != next->gencnt)
732	{
733	deallocate_stack (next);
734	allocate_stack (next, 1);
735	coro_create (&(next->stack->cctx),
736	continue_coro, (void *)next,
737	next->stack->sptr, labs (next->stack->ssize));
738	}
739
740	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
741	/* don't add any code here */
742	}
743
744	}	764	}
745	else if (next->tmps_ix == -2)	765
746	croak ("tried to transfer to running coroutine");	766	/TODO: must not croak here /
		767	if (!prev->flags & CF_RUNNING)
		768	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		769
		770	if (next->flags & CF_RUNNING)
		771	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		772
		773	if (next->flags & CF_DESTROYED)
		774	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		775
		776	prev->flags &= ~CF_RUNNING;
		777	next->flags \|= CF_RUNNING;
		778
		779	LOCK;
		780
		781	if (next->flags & CF_NEW)
		782	{
		783	/* need to start coroutine */
		784	next->flags &= ~CF_NEW;
		785	/* first get rid of the old state */
		786	save_perl (prev);
		787	/* setup coroutine call */
		788	setup_coro (next);
		789	/* need a new stack */
		790	assert (!next->cctx);
		791	}
747	else	792	else
748	{	793	{
749	SAVE (prev, -1); /* first get rid of the old state */	794	/* coroutine already started */
750		795	save_perl (prev);
751	if (flags & TRANSFER_SAVE_CCTXT)	796	load_perl (next);
752	{
753	if (!prev->stack)
754	allocate_stack (prev, 0);
755
756	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
757	{
758	PL_top_env = &next->start_env;
759
760	setup_coro (next);
761
762	prev->stack->refcnt++;
763	prev->stack->usecnt++;
764	next->stack = prev->stack;
765	next->gencnt = prev->gencnt;
766	}
767	else
768	{
769	assert (!next->stack);
770	allocate_stack (next, 1);
771	coro_create (&(next->stack->cctx),
772	setup_coro, (void *)next,
773	next->stack->sptr, labs (next->stack->ssize));
774	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
775	/* don't add any code here */
776	}
777	}
778	else
779	setup_coro (next);
780	}	797	}
781		798
782	/*	799	prev__cctx = prev->cctx;
783	* xnext is now either prev or next, depending on wether	800
784	* we switched the c stack or not. that's why I use a global	801	/* possibly "free" the cctx */
785	* variable, that should become thread-specific at one point.	802	if (prev__cctx->idle_sp == STACKLEVEL)
786	*/	803	{
787	xnext->cursp = stacklevel;	804	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
788	}	805	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
789		806
790	if (coro_mortal)	807	prev->cctx = 0;
		808
		809	cctx_put (prev__cctx);
		810	prev__cctx->inuse = 0;
		811	}
		812
		813	if (!next->cctx)
		814	{
		815	next->cctx = cctx_get ();
		816	assert (!next->cctx->inuse);
		817	next->cctx->inuse = 1;
		818	}
		819
		820	if (prev__cctx != next->cctx)
		821	{
		822	prev__cctx->top_env = PL_top_env;
		823	PL_top_env = next->cctx->top_env;
		824	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		825	}
		826
		827	free_coro_mortal ();
		828	UNLOCK;
791	{	829	}
792	SvREFCNT_dec (coro_mortal);	830	}
793	coro_mortal = 0;	831
		832	struct transfer_args
		833	{
		834	struct coro prev, next;
		835	};
		836
		837	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
		838
		839	/ high level stuff ******************************************************/
		840
		841	static int
		842	coro_state_destroy (struct coro *coro)
		843	{
		844	if (coro->flags & CF_DESTROYED)
		845	return 0;
		846
		847	coro->flags \|= CF_DESTROYED;
		848
		849	if (coro->flags & CF_READY)
794	}	850	{
795	}	851	/* reduce nready, as destroying a ready coro effectively unreadies it */
		852	/* alternative: look through all ready queues and remove the coro */
		853	LOCK;
		854	--coro_nready;
		855	UNLOCK;
		856	}
		857	else
		858	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
796		859
797	#define SV_CORO(sv,func) \	860	if (coro->mainstack && coro->mainstack != main_mainstack)
798	do { \	861	{
799	if (SvROK (sv)) \	862	struct coro temp;
800	sv = SvRV (sv); \
801	\
802	if (SvTYPE(sv) == SVt_PVHV) \
803	{ \
804	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
805	\
806	if (!he) \
807	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
808	\
809	(sv) = SvRV (HeVAL(he)); \
810	} \
811	\
812	/* must also be changed inside Coro::Cont::yield */ \
813	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
814	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
815	\
816	} while(0)
817		863
818	#define SvSTATE(sv) (struct coro *)SvIV (sv)	864	assert (!(coro->flags & CF_RUNNING));
819		865
		866	Zero (&temp, 1, struct coro);
		867	temp.save = CORO_SAVE_ALL;
		868
		869	if (coro->flags & CF_RUNNING)
		870	croak ("FATAL: tried to destroy currently running coroutine");
		871
		872	save_perl (&temp);
		873	load_perl (coro);
		874
		875	coro_destroy_stacks ();
		876
		877	load_perl (&temp); /* this will get rid of defsv etc.. */
		878
		879	coro->mainstack = 0;
		880	}
		881
		882	cctx_destroy (coro->cctx);
		883	SvREFCNT_dec (coro->args);
		884
		885	return 1;
		886	}
		887
820	static void	888	static int
		889	coro_state_free (pTHX_ SV sv, MAGIC mg)
		890	{
		891	struct coro coro = (struct coro )mg->mg_ptr;
		892	mg->mg_ptr = 0;
		893
		894	if (--coro->refcnt < 0)
		895	{
		896	coro_state_destroy (coro);
		897	Safefree (coro);
		898	}
		899
		900	return 0;
		901	}
		902
		903	static int
		904	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		905	{
		906	struct coro coro = (struct coro )mg->mg_ptr;
		907
		908	++coro->refcnt;
		909
		910	return 0;
		911	}
		912
		913	static MGVTBL coro_state_vtbl = {
		914	0, 0, 0, 0,
		915	coro_state_free,
		916	0,
		917	#ifdef MGf_DUP
		918	coro_state_dup,
		919	#else
		920	# define MGf_DUP 0
		921	#endif
		922	};
		923
		924	static struct coro *
		925	SvSTATE (SV *coro)
		926	{
		927	HV *stash;
		928	MAGIC *mg;
		929
		930	if (SvROK (coro))
		931	coro = SvRV (coro);
		932
		933	stash = SvSTASH (coro);
		934	if (stash != coro_stash && stash != coro_state_stash)
		935	{
		936	/* very slow, but rare, check */
		937	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		938	croak ("Coro::State object required");
		939	}
		940
		941	mg = SvMAGIC (coro);
		942	assert (mg->mg_type == PERL_MAGIC_ext);
		943	return (struct coro *)mg->mg_ptr;
		944	}
		945
		946	static void
		947	prepare_transfer (struct transfer_args ta, SV prev_sv, SV *next_sv)
		948	{
		949	ta->prev = SvSTATE (prev_sv);
		950	ta->next = SvSTATE (next_sv);
		951	}
		952
		953	static void
821	api_transfer(pTHX_ SV prev, SV next, int flags)	954	api_transfer (SV prev_sv, SV next_sv)
822	{	955	{
823	SV_CORO (prev, "Coro::transfer");	956	struct transfer_args ta;
824	SV_CORO (next, "Coro::transfer");
825		957
826	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	958	prepare_transfer (&ta, prev_sv, next_sv);
		959	TRANSFER (ta);
		960	}
		961
		962	static int
		963	api_save (SV *coro_sv, int new_save)
		964	{
		965	struct coro *coro = SvSTATE (coro_sv);
		966	int old_save = coro->save;
		967
		968	if (new_save >= 0)
		969	coro->save = new_save;
		970
		971	return old_save;
827	}	972	}
828		973
829	/ Coro ******************************************************************/	974	/ Coro ******************************************************************/
830		975
831	#define PRIO_MAX 3
832	#define PRIO_HIGH 1
833	#define PRIO_NORMAL 0
834	#define PRIO_LOW -1
835	#define PRIO_IDLE -3
836	#define PRIO_MIN -4
837
838	/* for Coro.pm */
839	static GV coro_current, coro_idle;
840	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
841	static int coro_nready;
842
843	static void	976	static void
844	coro_enq (SV *sv)	977	coro_enq (SV *coro_sv)
845	{	978	{
846	if (SvTYPE (sv) == SVt_PVHV)
847	{
848	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
849	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
850
851	prio = prio > PRIO_MAX ? PRIO_MAX
852	: prio < PRIO_MIN ? PRIO_MIN
853	: prio;
854
855	av_push (coro_ready [prio - PRIO_MIN], sv);	979	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
856	coro_nready++;
857
858	return;
859	}
860
861	croak ("Coro::ready tried to enqueue something that is not a coroutine");
862	}	980	}
863		981
864	static SV *	982	static SV *
865	coro_deq (int min_prio)	983	coro_deq (int min_prio)
866	{	984	{
…		…
869	min_prio -= PRIO_MIN;	987	min_prio -= PRIO_MIN;
870	if (min_prio < 0)	988	if (min_prio < 0)
871	min_prio = 0;	989	min_prio = 0;
872		990
873	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	991	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
874	if (av_len (coro_ready[prio]) >= 0)	992	if (AvFILLp (coro_ready [prio]) >= 0)
875	{
876	coro_nready--;
877	return av_shift (coro_ready[prio]);	993	return av_shift (coro_ready [prio]);
878	}
879		994
880	return 0;	995	return 0;
881	}	996	}
882		997
883	static void	998	static int
884	api_ready (SV *coro)	999	api_ready (SV *coro_sv)
885	{	1000	{
		1001	struct coro *coro;
		1002
886	if (SvROK (coro))	1003	if (SvROK (coro_sv))
887	coro = SvRV (coro);	1004	coro_sv = SvRV (coro_sv);
888		1005
		1006	coro = SvSTATE (coro_sv);
		1007
		1008	if (coro->flags & CF_READY)
		1009	return 0;
		1010
		1011	coro->flags \|= CF_READY;
		1012
		1013	LOCK;
889	coro_enq (SvREFCNT_inc (coro));	1014	coro_enq (SvREFCNT_inc (coro_sv));
		1015	++coro_nready;
		1016	UNLOCK;
		1017
		1018	return 1;
		1019	}
		1020
		1021	static int
		1022	api_is_ready (SV *coro_sv)
		1023	{
		1024	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1025	}
		1026
		1027	static void
		1028	prepare_schedule (struct transfer_args *ta)
		1029	{
		1030	SV prev_sv, next_sv;
		1031
		1032	for (;;)
		1033	{
		1034	LOCK;
		1035	next_sv = coro_deq (PRIO_MIN);
		1036
		1037	/* nothing to schedule: call the idle handler */
		1038	if (!next_sv)
		1039	{
		1040	dSP;
		1041	UNLOCK;
		1042
		1043	ENTER;
		1044	SAVETMPS;
		1045
		1046	PUSHMARK (SP);
		1047	PUTBACK;
		1048	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1049
		1050	FREETMPS;
		1051	LEAVE;
		1052	continue;
		1053	}
		1054
		1055	ta->next = SvSTATE (next_sv);
		1056
		1057	/* cannot transfer to destroyed coros, skip and look for next */
		1058	if (ta->next->flags & CF_DESTROYED)
		1059	{
		1060	UNLOCK;
		1061	SvREFCNT_dec (next_sv);
		1062	/* coro_nready is already taken care of by destroy */
		1063	continue;
		1064	}
		1065
		1066	--coro_nready;
		1067	UNLOCK;
		1068	break;
		1069	}
		1070
		1071	/* free this only after the transfer */
		1072	prev_sv = SvRV (coro_current);
		1073	SvRV_set (coro_current, next_sv);
		1074	ta->prev = SvSTATE (prev_sv);
		1075
		1076	assert (ta->next->flags & CF_READY);
		1077	ta->next->flags &= ~CF_READY;
		1078
		1079	LOCK;
		1080	free_coro_mortal ();
		1081	coro_mortal = prev_sv;
		1082	UNLOCK;
		1083	}
		1084
		1085	static void
		1086	prepare_cede (struct transfer_args *ta)
		1087	{
		1088	api_ready (coro_current);
		1089	prepare_schedule (ta);
		1090	}
		1091
		1092	static int
		1093	prepare_cede_notself (struct transfer_args *ta)
		1094	{
		1095	if (coro_nready)
		1096	{
		1097	SV *prev = SvRV (coro_current);
		1098	prepare_schedule (ta);
		1099	api_ready (prev);
		1100	return 1;
		1101	}
		1102	else
		1103	return 0;
890	}	1104	}
891		1105
892	static void	1106	static void
893	api_schedule (void)	1107	api_schedule (void)
894	{	1108	{
895	SV prev, next;	1109	struct transfer_args ta;
896		1110
897	prev = SvRV (GvSV (coro_current));	1111	prepare_schedule (&ta);
898	next = coro_deq (PRIO_MIN);	1112	TRANSFER (ta);
899
900	if (!next)
901	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
902
903	/* free this only after the transfer */
904	coro_mortal = prev;
905	SV_CORO (prev, "Coro::schedule");
906
907	SvRV (GvSV (coro_current)) = next;
908
909	SV_CORO (next, "Coro::schedule");
910
911	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
912	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
913	}	1113	}
914		1114
915	static void	1115	static int
916	api_cede (void)	1116	api_cede (void)
917	{	1117	{
918	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1118	struct transfer_args ta;
919		1119
920	api_schedule ();	1120	prepare_cede (&ta);
		1121
		1122	if (ta.prev != ta.next)
		1123	{
		1124	TRANSFER (ta);
		1125	return 1;
		1126	}
		1127	else
		1128	return 0;
		1129	}
		1130
		1131	static int
		1132	api_cede_notself (void)
		1133	{
		1134	struct transfer_args ta;
		1135
		1136	if (prepare_cede_notself (&ta))
		1137	{
		1138	TRANSFER (ta);
		1139	return 1;
		1140	}
		1141	else
		1142	return 0;
921	}	1143	}
922		1144
923	MODULE = Coro::State PACKAGE = Coro::State	1145	MODULE = Coro::State PACKAGE = Coro::State
924		1146
925	PROTOTYPES: ENABLE	1147	PROTOTYPES: DISABLE
926		1148
927	BOOT:	1149	BOOT:
928	{ /* {} necessary for stoopid perl-5.6.x */	1150	{
929	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1151	#ifdef USE_ITHREADS
930	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1152	MUTEX_INIT (&coro_mutex);
		1153	#endif
		1154	BOOT_PAGESIZE;
		1155
931	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1156	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
932		1157
933	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1158	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
934	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1159	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
935	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1160	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1161	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
936	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1162	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
937
938	if (!padlist_cache)
939	padlist_cache = newHV ();
940		1163
941	main_mainstack = PL_mainstack;	1164	main_mainstack = PL_mainstack;
942		1165
943	coroapi.ver = CORO_API_VERSION;	1166	coroapi.ver = CORO_API_VERSION;
944	coroapi.transfer = api_transfer;	1167	coroapi.transfer = api_transfer;
945	}
946		1168
947	Coro::State	1169	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
948	_newprocess(args)	1170	}
949	SV * args	1171
950	PROTOTYPE: $	1172	SV *
		1173	new (char *klass, ...)
951	CODE:	1174	CODE:
952	Coro__State coro;	1175	{
		1176	struct coro *coro;
		1177	HV *hv;
		1178	int i;
953		1179
954	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
955	croak ("Coro::State::_newprocess expects an arrayref");
956
957	Newz (0, coro, 1, struct coro);	1180	Newz (0, coro, 1, struct coro);
		1181	coro->args = newAV ();
		1182	coro->save = CORO_SAVE_ALL;
		1183	coro->flags = CF_NEW;
958		1184
959	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1185	hv = newHV ();
960	coro->mainstack = 0; /* actual work is done inside transfer */	1186	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
961	coro->stack = 0;	1187	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
962		1188
963	/* same as JMPENV_BOOTSTRAP */	1189	for (i = 1; i < items; i++)
964	/* we might be able to recycle start_env, but safe is safe */	1190	av_push (coro->args, newSVsv (ST (i)));
965	//Zero(&coro->start_env, 1, JMPENV);	1191	}
966	coro->start_env.je_ret = -1;
967	coro->start_env.je_mustcatch = TRUE;
968
969	RETVAL = coro;
970	OUTPUT:	1192	OUTPUT:
971	RETVAL	1193	RETVAL
972		1194
		1195	int
		1196	save (SV *coro, int new_save = -1)
		1197	CODE:
		1198	RETVAL = api_save (coro, new_save);
		1199	OUTPUT:
		1200	RETVAL
		1201
973	void	1202	void
974	transfer(prev, next, flags)	1203	_set_stacklevel (...)
975	SV *prev	1204	ALIAS:
976	SV *next	1205	Coro::State::transfer = 1
977	int flags	1206	Coro::schedule = 2
978	PROTOTYPE: @	1207	Coro::cede = 3
		1208	Coro::cede_notself = 4
979	CODE:	1209	CODE:
980	PUTBACK;	1210	{
981	SV_CORO (next, "Coro::transfer");	1211	struct transfer_args ta;
982	SV_CORO (prev, "Coro::transfer");	1212
983	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1213	switch (ix)
984	SPAGAIN;	1214	{
		1215	case 0:
		1216	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1217	ta.next = 0;
		1218	break;
		1219
		1220	case 1:
		1221	if (items != 2)
		1222	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1223
		1224	prepare_transfer (&ta, ST (0), ST (1));
		1225	break;
		1226
		1227	case 2:
		1228	prepare_schedule (&ta);
		1229	break;
		1230
		1231	case 3:
		1232	prepare_cede (&ta);
		1233	break;
		1234
		1235	case 4:
		1236	if (!prepare_cede_notself (&ta))
		1237	XSRETURN_EMPTY;
		1238
		1239	break;
		1240	}
		1241
		1242	BARRIER;
		1243	TRANSFER (ta);
		1244
		1245	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1246	XSRETURN_YES;
		1247	}
		1248
		1249	bool
		1250	_destroy (SV *coro_sv)
		1251	CODE:
		1252	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
		1253	OUTPUT:
		1254	RETVAL
985		1255
986	void	1256	void
987	DESTROY(coro)
988	Coro::State coro
989	CODE:
990
991	if (coro->mainstack && coro->mainstack != main_mainstack)
992	{
993	struct coro temp;
994
995	PUTBACK;
996	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
997	LOAD(aTHX_ coro);
998	SPAGAIN;
999
1000	destroy_stacks (aTHX);
1001
1002	LOAD((&temp)); /* this will get rid of defsv etc.. */
1003	SPAGAIN;
1004
1005	coro->mainstack = 0;
1006	}
1007
1008	deallocate_stack (coro);
1009	SvREFCNT_dec (coro->args);
1010	Safefree (coro);
1011
1012	void
1013	flush()
1014	CODE:
1015	#ifdef MAY_FLUSH
1016	flush_padlist_cache ();
1017	#endif
1018
1019	void
1020	_exit(code)	1257	_exit (code)
1021	int code	1258	int code
1022	PROTOTYPE: $	1259	PROTOTYPE: $
1023	CODE:	1260	CODE:
1024	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
1025	_exit (code);	1261	_exit (code);
1026	#else
1027	signal (SIGTERM, SIG_DFL);
1028	raise (SIGTERM);
1029	exit (code);
1030	#endif
1031		1262
1032	MODULE = Coro::State PACKAGE = Coro::Cont	1263	int
		1264	cctx_count ()
		1265	CODE:
		1266	RETVAL = cctx_count;
		1267	OUTPUT:
		1268	RETVAL
1033		1269
1034	# this is slightly dirty (should expose a c-level api)	1270	int
1035		1271	cctx_idle ()
1036	void	1272	CODE:
1037	yield(...)	1273	RETVAL = cctx_idle;
1038	PROTOTYPE: @	1274	OUTPUT:
1039	CODE:	1275	RETVAL
1040	static SV *returnstk;
1041	SV *sv;
1042	AV *defav = GvAV (PL_defgv);
1043	struct coro prev, next;
1044
1045	if (!returnstk)
1046	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1047
1048	/* set up @_ -- ugly */
1049	av_clear (defav);
1050	av_fill (defav, items - 1);
1051	while (items--)
1052	av_store (defav, items, SvREFCNT_inc (ST(items)));
1053
1054	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1055	sv = av_pop ((AV *)SvRV (returnstk));
1056	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
1057	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
1058	SvREFCNT_dec (sv);
1059
1060	transfer(aTHX_ prev, next, 0);
1061		1276
1062	MODULE = Coro::State PACKAGE = Coro	1277	MODULE = Coro::State PACKAGE = Coro
1063		1278
1064	# this is slightly dirty (should expose a c-level api)
1065
1066	BOOT:	1279	BOOT:
1067	{	1280	{
1068	int i;	1281	int i;
		1282
1069	HV *stash = gv_stashpv ("Coro", TRUE);	1283	coro_stash = gv_stashpv ("Coro", TRUE);
1070		1284
1071	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1285	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1286	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1287	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1288	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1289	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1290	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1077		1291
1078	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1292	coro_current = get_sv ("Coro::current", FALSE);
1079	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1293	SvREADONLY_on (coro_current);
1080		1294
1081	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1295	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1082	coro_ready[i] = newAV ();	1296	coro_ready[i] = newAV ();
1083		1297
1084	{	1298	{
1085	SV *sv = perl_get_sv("Coro::API", 1);	1299	SV *sv = perl_get_sv("Coro::API", 1);
1086		1300
1087	coroapi.schedule = api_schedule;	1301	coroapi.schedule = api_schedule;
		1302	coroapi.save = api_save;
1088	coroapi.cede = api_cede;	1303	coroapi.cede = api_cede;
		1304	coroapi.cede_notself = api_cede_notself;
1089	coroapi.ready = api_ready;	1305	coroapi.ready = api_ready;
		1306	coroapi.is_ready = api_is_ready;
1090	coroapi.nready = &coro_nready;	1307	coroapi.nready = &coro_nready;
1091	coroapi.current = coro_current;	1308	coroapi.current = coro_current;
1092		1309
1093	GCoroAPI = &coroapi;	1310	GCoroAPI = &coroapi;
1094	sv_setiv(sv, (IV)&coroapi);	1311	sv_setiv (sv, (IV)&coroapi);
1095	SvREADONLY_on(sv);	1312	SvREADONLY_on (sv);
1096	}	1313	}
1097	}	1314	}
1098		1315
1099	void	1316	void
1100	ready(self)	1317	_set_current (SV *current)
1101	SV * self
1102	PROTOTYPE: $	1318	PROTOTYPE: $
1103	CODE:	1319	CODE:
1104	api_ready (self);	1320	SvREFCNT_dec (SvRV (coro_current));
		1321	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1105		1322
1106	int	1323	int
		1324	prio (Coro::State coro, int newprio = 0)
		1325	ALIAS:
		1326	nice = 1
		1327	CODE:
		1328	{
		1329	RETVAL = coro->prio;
		1330
		1331	if (items > 1)
		1332	{
		1333	if (ix)
		1334	newprio = coro->prio - newprio;
		1335
		1336	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1337	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1338
		1339	coro->prio = newprio;
		1340	}
		1341	}
		1342	OUTPUT:
		1343	RETVAL
		1344
		1345	SV *
		1346	ready (SV *self)
		1347	PROTOTYPE: $
		1348	CODE:
		1349	RETVAL = boolSV (api_ready (self));
		1350	OUTPUT:
		1351	RETVAL
		1352
		1353	SV *
		1354	is_ready (SV *self)
		1355	PROTOTYPE: $
		1356	CODE:
		1357	RETVAL = boolSV (api_is_ready (self));
		1358	OUTPUT:
		1359	RETVAL
		1360
		1361	int
1107	nready(...)	1362	nready (...)
1108	PROTOTYPE:	1363	PROTOTYPE:
1109	CODE:	1364	CODE:
1110	RETVAL = coro_nready;	1365	RETVAL = coro_nready;
1111	OUTPUT:	1366	OUTPUT:
1112	RETVAL	1367	RETVAL
1113		1368
		1369	MODULE = Coro::State PACKAGE = Coro::AIO
		1370
		1371	SV *
		1372	_get_state ()
		1373	CODE:
		1374	{
		1375	struct io_state *data;
		1376
		1377	RETVAL = newSV (sizeof (struct io_state));
		1378	data = (struct io_state *)SvPVX (RETVAL);
		1379	SvCUR_set (RETVAL, sizeof (struct io_state));
		1380	SvPOK_only (RETVAL);
		1381
		1382	data->errorno = errno;
		1383	data->laststype = PL_laststype;
		1384	data->laststatval = PL_laststatval;
		1385	data->statcache = PL_statcache;
		1386	}
		1387	OUTPUT:
		1388	RETVAL
		1389
1114	void	1390	void
1115	schedule(...)	1391	_set_state (char *data_)
1116	PROTOTYPE:	1392	PROTOTYPE: $
1117	CODE:	1393	CODE:
1118	api_schedule ();	1394	{
		1395	struct io_state data = (void )data_;
1119		1396
1120	void	1397	errno = data->errorno;
1121	cede(...)	1398	PL_laststype = data->laststype;
1122	PROTOTYPE:	1399	PL_laststatval = data->laststatval;
1123	CODE:	1400	PL_statcache = data->statcache;
1124	api_cede ();	1401	}
1125		1402

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Comparing Coro/Coro/State.xs (file contents): Revision 1.48 by pcg, Sat Nov 15 03:53:37 2003 UTC vs. Revision 1.142 by root, Tue Feb 13 19:21:29 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.48 by pcg, Sat Nov 15 03:53:37 2003 UTC vs.
Revision 1.142 by root, Tue Feb 13 19:21:29 2007 UTC