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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.55 by pcg, Thu Apr 1 02:29:05 2004 UTC vs.
Revision 1.151 by root, Wed Sep 19 21:39:15 2007 UTC

…		…
		1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "patchlevel.h"	9	#include "patchlevel.h"
6		10
7	#if PATCHLEVEL < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	\|\| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
8	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
10	# endif	57	# endif
11	# ifndef call_sv	58	# ifndef call_sv
12	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
23	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
25	# endif	72	# endif
26	#endif	73	#endif
27		74
28	#include "libcoro/coro.c"	75	/* 5.8.7 */
29		76	#ifndef SvRV_set
30	#include <signal.h>	77	# define SvRV_set(s,v) SvRV(s) = (v)
31
32	#ifdef HAVE_MMAP
33	# include <unistd.h>
34	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS
36	# ifdef MAP_ANON
37	# define MAP_ANONYMOUS MAP_ANON
38	# else
39	# undef HAVE_MMAP
40	# endif
41	# endif	78	#endif
42	#endif
43		79
44	#define SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
45	#define UCORO_STATE "_coro_state"	81	# undef CORO_STACKGUARD
		82	#endif
		83
		84	#ifndef CORO_STACKGUARD
		85	# define CORO_STACKGUARD 0
		86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
46		92
47	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macro should declare a variable stacklevel that contains and approximation
48	* to the current C stack pointer. Its property is that it changes with each call	94	* to the current C stack pointer. Its property is that it changes with each call
49	* and should be unique. */	95	* and should be unique. */
		96	#define dSTACKLEVEL int stacklevel
50	#define dSTACKLEVEL void *stacklevel = &stacklevel	97	#define STACKLEVEL ((void *)&stacklevel)
51		98
52	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
53		100
54	#define labs(l) ((l) >= 0 ? (l) : -(l))	101	#if __GNUC__ >= 3
		102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		104	#else
		105	# define attribute(x)
		106	# define BARRIER
		107	#endif
		108
		109	#define NOINLINE attribute ((noinline))
55		110
56	#include "CoroAPI.h"	111	#include "CoroAPI.h"
57		112
58	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
59	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
60	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
61	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
62	#else	117	#else
63	# define LOCK 0	118	# define LOCK (void)0
64	# define UNLOCK 0	119	# define UNLOCK (void)0
65	#endif	120	#endif
66		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;
67	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
		133	static AV main_mainstack; / used to differentiate between $main and others */
		134	static JMPENV *main_top_env;
		135	static HV coro_state_stash, coro_stash;
		136	static SV coro_mortal; / will be freed after next transfer */
68		137
69	/* this is actually not only the c stack but also c registers etc... */	138	static struct coro_cctx *cctx_first;
		139	static int cctx_count, cctx_idle;
		140
		141	/* this is a structure representing a c-level coroutine */
70	typedef struct {	142	typedef struct coro_cctx {
71	int refcnt; /* pointer reference counter */	143	struct coro_cctx *next;
72	int usecnt; /* shared by how many coroutines */
73	int gencnt; /* generation counter */
74		144
		145	/* the stack */
		146	void *sptr;
		147	size_t ssize;
		148
		149	/* cpu state */
		150	void idle_sp; / sp of top-level transfer/schedule/cede call */
		151	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		152	JMPENV *top_env;
75	coro_context cctx;	153	coro_context cctx;
76		154
77	void *sptr;	155	#if CORO_USE_VALGRIND
78	long ssize; /* positive == mmap, otherwise malloc */	156	int valgrind_id;
79	} coro_stack;	157	#endif
		158	char inuse, mapped;
		159	} coro_cctx;
80		160
		161	enum {
		162	CF_RUNNING = 0x0001, /* coroutine is running */
		163	CF_READY = 0x0002, /* coroutine is ready */
		164	CF_NEW = 0x0004, /* has never been switched to */
		165	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		166	};
		167
		168	/* this is a structure representing a perl-level coroutine */
81	struct coro {	169	struct coro {
82	/* the top-level JMPENV for each coroutine, needed to catch dies. */	170	/* the c coroutine allocated to this perl coroutine, if any */
83	JMPENV start_env;	171	coro_cctx *cctx;
84
85	/* the optional C context */
86	coro_stack *stack;
87	void *cursp;
88	int gencnt;
89
90	/* optionally saved, might be zero */
91	AV *defav;
92	SV *defsv;
93	SV *errsv;
94
95	/* saved global state not related to stacks */
96	U8 dowarn;
97	I32 in_eval;
98
99	/* the stacks and related info (callchain etc..) */
100	PERL_SI *curstackinfo;
101	AV *curstack;
102	AV *mainstack;
103	SV **stack_sp;
104	OP *op;
105	SV **curpad;
106	AV *comppad;
107	SV **stack_base;
108	SV **stack_max;
109	SV **tmps_stack;
110	I32 tmps_floor;
111	I32 tmps_ix;
112	I32 tmps_max;
113	I32 *markstack;
114	I32 *markstack_ptr;
115	I32 *markstack_max;
116	I32 *scopestack;
117	I32 scopestack_ix;
118	I32 scopestack_max;
119	ANY *savestack;
120	I32 savestack_ix;
121	I32 savestack_max;
122	OP **retstack;
123	I32 retstack_ix;
124	I32 retstack_max;
125	COP *curcop;
126	JMPENV *top_env;
127		172
128	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
129	AV *args;	174	AV *args;
		175	int refcnt;
		176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
		178
		179	/* optionally saved, might be zero */
		180	AV defav; / @_ */
		181	SV defsv; / $_ */
		182	SV errsv; / $@ */
		183	GV deffh; / default filehandle */
		184	SV irssv; / $/ */
		185	SV irssv_sv; / real $/ cache */
		186
		187	#define VAR(name,type) type name;
		188	# include "state.h"
		189	#undef VAR
		190
		191	/* coro process data */
		192	int prio;
		193
		194	/* linked list */
		195	struct coro next, prev;
		196	HV hv; / the perl hash associated with this coro, if any */
130	};	197	};
131		198
132	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
133	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
134		201
135	static AV main_mainstack; / used to differentiate between $main and others */	202	/ Coro ******************************************************************/
136	static HV *coro_state_stash;
137	static SV *ucoro_state_sv;
138	static U32 ucoro_state_hash;
139	static SV coro_mortal; / will be freed after next transfer */
140		203
141	/* mostly copied from op.c:cv_clone2 */	204	#define PRIO_MAX 3
142	STATIC AV *	205	#define PRIO_HIGH 1
143	clone_padlist (AV *protopadlist)	206	#define PRIO_NORMAL 0
		207	#define PRIO_LOW -1
		208	#define PRIO_IDLE -3
		209	#define PRIO_MIN -4
		210
		211	/* for Coro.pm */
		212	static SV *coro_current;
		213	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		214	static int coro_nready;
		215	static struct coro *first;
		216
		217	/ lowlevel stuff ********************************************************/
		218
		219	static AV *
		220	coro_clone_padlist (pTHX_ CV *cv)
144	{	221	{
145	AV *av;	222	AV *padlist = CvPADLIST (cv);
146	I32 ix;
147	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
148	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
149	SV **pname = AvARRAY (protopad_name);
150	SV **ppad = AvARRAY (protopad);
151	I32 fname = AvFILLp (protopad_name);
152	I32 fpad = AvFILLp (protopad);
153	AV newpadlist, newpad_name, *newpad;	223	AV newpadlist, newpad;
154	SV **npad;
155
156	newpad_name = newAV ();
157	for (ix = fname; ix >= 0; ix--)
158	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
159
160	newpad = newAV ();
161	av_fill (newpad, AvFILLp (protopad));
162	npad = AvARRAY (newpad);
163		224
164	newpadlist = newAV ();	225	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	226	AvREAL_off (newpadlist);
166	av_store (newpadlist, 0, (SV *) newpad_name);	227	#if PERL_VERSION_ATLEAST (5,9,0)
		228	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		229	#else
		230	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		231	#endif
		232	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		233	--AvFILLp (padlist);
		234
		235	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
167	av_store (newpadlist, 1, (SV *) newpad);	236	av_store (newpadlist, 1, (SV *)newpad);
168
169	av = newAV (); /* will be @_ */
170	av_extend (av, 0);
171	av_store (newpad, 0, (SV *) av);
172	AvFLAGS (av) = AVf_REIFY;
173
174	for (ix = fpad; ix > 0; ix--)
175	{
176	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
177
178	if (namesv && namesv != &PL_sv_undef)
179	{
180	char name = SvPVX (namesv); / XXX */
181
182	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')
183	{ /* lexical from outside? */
184	npad[ix] = SvREFCNT_inc (ppad[ix]);
185	}
186	else
187	{ /* our own lexical */
188	SV *sv;
189	if (*name == '&')
190	sv = SvREFCNT_inc (ppad[ix]);
191	else if (*name == '@')
192	sv = (SV *) newAV ();
193	else if (*name == '%')
194	sv = (SV *) newHV ();
195	else
196	sv = NEWSV (0, 0);
197
198	#ifdef SvPADBUSY
199	if (!SvPADBUSY (sv))
200	#endif
201	SvPADMY_on (sv);
202
203	npad[ix] = sv;
204	}
205	}
206	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
207	{
208	npad[ix] = SvREFCNT_inc (ppad[ix]);
209	}
210	else
211	{
212	SV *sv = NEWSV (0, 0);
213	SvPADTMP_on (sv);
214	npad[ix] = sv;
215	}
216	}
217
218	#if 0 /* return -ENOTUNDERSTOOD */
219	/* Now that vars are all in place, clone nested closures. */
220
221	for (ix = fpad; ix > 0; ix--) {
222	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
223	if (namesv
224	&& namesv != &PL_sv_undef
225	&& !(SvFLAGS(namesv) & SVf_FAKE)
226	&& *SvPVX(namesv) == '&'
227	&& CvCLONE(ppad[ix]))
228	{
229	CV kid = cv_clone((CV)ppad[ix]);
230	SvREFCNT_dec(ppad[ix]);
231	CvCLONE_on(kid);
232	SvPADMY_on(kid);
233	npad[ix] = (SV*)kid;
234	}
235	}
236	#endif
237		237
238	return newpadlist;	238	return newpadlist;
239	}	239	}
240		240
241	STATIC void	241	static void
242	free_padlist (AV *padlist)	242	free_padlist (pTHX_ AV *padlist)
243	{	243	{
244	/* may be during global destruction */	244	/* may be during global destruction */
245	if (SvREFCNT (padlist))	245	if (SvREFCNT (padlist))
246	{	246	{
247	I32 i = AvFILLp (padlist);	247	I32 i = AvFILLp (padlist);
…		…
260		260
261	SvREFCNT_dec ((SV*)padlist);	261	SvREFCNT_dec ((SV*)padlist);
262	}	262	}
263	}	263	}
264		264
265	STATIC int	265	static int
266	coro_cv_free (pTHX_ SV sv, MAGIC mg)	266	coro_cv_free (pTHX_ SV sv, MAGIC mg)
267	{	267	{
268	AV *padlist;	268	AV *padlist;
269	AV av = (AV )mg->mg_obj;	269	AV av = (AV )mg->mg_obj;
270		270
271	/* casting is fun. */	271	/* casting is fun. */
272	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	272	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
273	free_padlist (padlist);	273	free_padlist (aTHX_ padlist);
		274
		275	SvREFCNT_dec (av);
		276
		277	return 0;
274	}	278	}
275		279
276	#define PERL_MAGIC_coro PERL_MAGIC_ext	280	#define PERL_MAGIC_coro PERL_MAGIC_ext
277		281
278	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
279		283
		284	#define CORO_MAGIC(cv) \
		285	SvMAGIC (cv) \
		286	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		287	? SvMAGIC (cv) \
		288	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		289	: 0
		290
280	/* the next two functions merely cache the padlists */	291	/* the next two functions merely cache the padlists */
281	STATIC void	292	static void
282	get_padlist (CV *cv)	293	get_padlist (pTHX_ CV *cv)
283	{	294	{
284	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	295	MAGIC *mg = CORO_MAGIC (cv);
		296	AV *av;
285		297
286	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
287	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
288	else	300	else
		301	{
		302	#if CORO_PREFER_PERL_FUNCTIONS
		303	/* this is probably cleaner, but also slower? */
		304	CV *cp = Perl_cv_clone (cv);
		305	CvPADLIST (cv) = CvPADLIST (cp);
		306	CvPADLIST (cp) = 0;
		307	SvREFCNT_dec (cp);
		308	#else
289	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		310	#endif
		311	}
290	}	312	}
291		313
292	STATIC void	314	static void
293	put_padlist (CV *cv)	315	put_padlist (pTHX_ CV *cv)
294	{	316	{
295	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	317	MAGIC *mg = CORO_MAGIC (cv);
		318	AV *av;
296		319
297	if (!mg)	320	if (!mg)
298	{	321	{
299	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	322	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
300	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	323	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
301	mg->mg_virtual = &vtbl_coro;	324	mg->mg_virtual = &vtbl_coro;
302	mg->mg_obj = (SV *)newAV ();	325	mg->mg_obj = (SV *)newAV ();
303	}	326	}
304		327
305	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	328	av = (AV *)mg->mg_obj;
		329
		330	if (AvFILLp (av) >= AvMAX (av))
		331	av_extend (av, AvMAX (av) + 1);
		332
		333	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
306	}	334	}
		335
		336	/ load & save, init *****************************************************/
307		337
308	#define SB do {	338	#define SB do {
309	#define SE } while (0)	339	#define SE } while (0)
310		340
311	#define LOAD(state) load_state(aTHX_ (state));
312	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
313
314	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	341	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
315		342
316	static void	343	static void
317	load_state(pTHX_ Coro__State c)	344	load_perl (pTHX_ Coro__State c)
318	{	345	{
319	PL_dowarn = c->dowarn;	346	#define VAR(name,type) PL_ ## name = c->name;
320	PL_in_eval = c->in_eval;	347	# include "state.h"
321		348	#undef VAR
322	PL_curstackinfo = c->curstackinfo;
323	PL_curstack = c->curstack;
324	PL_mainstack = c->mainstack;
325	PL_stack_sp = c->stack_sp;
326	PL_op = c->op;
327	PL_curpad = c->curpad;
328	PL_comppad = c->comppad;
329	PL_stack_base = c->stack_base;
330	PL_stack_max = c->stack_max;
331	PL_tmps_stack = c->tmps_stack;
332	PL_tmps_floor = c->tmps_floor;
333	PL_tmps_ix = c->tmps_ix;
334	PL_tmps_max = c->tmps_max;
335	PL_markstack = c->markstack;
336	PL_markstack_ptr = c->markstack_ptr;
337	PL_markstack_max = c->markstack_max;
338	PL_scopestack = c->scopestack;
339	PL_scopestack_ix = c->scopestack_ix;
340	PL_scopestack_max = c->scopestack_max;
341	PL_savestack = c->savestack;
342	PL_savestack_ix = c->savestack_ix;
343	PL_savestack_max = c->savestack_max;
344	PL_retstack = c->retstack;
345	PL_retstack_ix = c->retstack_ix;
346	PL_retstack_max = c->retstack_max;
347	PL_curcop = c->curcop;
348	PL_top_env = c->top_env;
349		349
350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
352	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	352	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		353	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		354
		355	if (c->irssv)
		356	{
		357	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
		358	{
		359	SvREFCNT_dec (c->irssv);
		360	c->irssv = 0;
		361	}
		362	else
		363	{
		364	REPLACE_SV (PL_rs, c->irssv);
		365	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		366	sv_setsv (c->irssv_sv, PL_rs);
		367	}
		368	}
353		369
354	{	370	{
355	dSP;	371	dSP;
356	CV *cv;	372	CV *cv;
357		373
358	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
359	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
360	{	376	{
361	AV padlist = (AV )POPs;
362
363	if (padlist)
364	{
365	put_padlist (cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
366	CvPADLIST(cv) = padlist;	378	CvDEPTH (cv) = PTR2IV (POPs);
367	}	379	CvPADLIST (cv) = (AV *)POPs;
368
369	++CvDEPTH(cv);
370	}	380	}
371		381
372	PUTBACK;	382	PUTBACK;
373	}	383	}
374	}	384	}
375		385
376	static void	386	static void
377	save_state(pTHX_ Coro__State c, int flags)	387	save_perl (pTHX_ Coro__State c)
378	{	388	{
379	{	389	{
380	dSP;	390	dSP;
381	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
382	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
…		…
385	/*	395	/*
386	* the worst thing you can imagine happens first - we have to save	396	* the worst thing you can imagine happens first - we have to save
387	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
388	*/	398	*/
389		399
		400	EXTEND (SP, 3 + 1);
390	PUSHs (Nullsv);	401	PUSHs (Nullsv);
391	/* this loop was inspired by pp_caller */	402	/* this loop was inspired by pp_caller */
392	for (;;)	403	for (;;)
393	{	404	{
394	while (cxix >= 0)	405	while (cxix >= 0)
395	{	406	{
396	PERL_CONTEXT *cx = &ccstk[cxix--];	407	PERL_CONTEXT *cx = &ccstk[cxix--];
397		408
398	if (CxTYPE(cx) == CXt_SUB)	409	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
399	{	410	{
400	CV *cv = cx->blk_sub.cv;	411	CV *cv = cx->blk_sub.cv;
		412
401	if (CvDEPTH(cv))	413	if (CvDEPTH (cv))
402	{	414	{
403	EXTEND (SP, CvDEPTH(cv)*2);	415	EXTEND (SP, 3);
404
405	while (--CvDEPTH(cv))
406	{
407	/* this tells the restore code to increment CvDEPTH */
408	PUSHs (Nullsv);
409	PUSHs ((SV *)cv);
410	}
411
412	PUSHs ((SV *)CvPADLIST(cv));	416	PUSHs ((SV *)CvPADLIST (cv));
		417	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
413	PUSHs ((SV *)cv);	418	PUSHs ((SV *)cv);
414		419
415	get_padlist (cv); /* this is a monster */	420	CvDEPTH (cv) = 0;
		421	get_padlist (aTHX_ cv);
416	}	422	}
417	}	423	}
418	#ifdef CXt_FORMAT
419	else if (CxTYPE(cx) == CXt_FORMAT)
420	{
421	/* I never used formats, so how should I know how these are implemented? */
422	/* my bold guess is as a simple, plain sub... */
423	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
424	}
425	#endif
426	}	424	}
427		425
428	if (top_si->si_type == PERLSI_MAIN)	426	if (top_si->si_type == PERLSI_MAIN)
429	break;	427	break;
430		428
…		…
434	}	432	}
435		433
436	PUTBACK;	434	PUTBACK;
437	}	435	}
438		436
439	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	437	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
440	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	438	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
441	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	439	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		440	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		441	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
442		442
443	c->dowarn = PL_dowarn;	443	#define VAR(name,type)c->name = PL_ ## name;
444	c->in_eval = PL_in_eval;	444	# include "state.h"
445		445	#undef VAR
446	c->curstackinfo = PL_curstackinfo;
447	c->curstack = PL_curstack;
448	c->mainstack = PL_mainstack;
449	c->stack_sp = PL_stack_sp;
450	c->op = PL_op;
451	c->curpad = PL_curpad;
452	c->comppad = PL_comppad;
453	c->stack_base = PL_stack_base;
454	c->stack_max = PL_stack_max;
455	c->tmps_stack = PL_tmps_stack;
456	c->tmps_floor = PL_tmps_floor;
457	c->tmps_ix = PL_tmps_ix;
458	c->tmps_max = PL_tmps_max;
459	c->markstack = PL_markstack;
460	c->markstack_ptr = PL_markstack_ptr;
461	c->markstack_max = PL_markstack_max;
462	c->scopestack = PL_scopestack;
463	c->scopestack_ix = PL_scopestack_ix;
464	c->scopestack_max = PL_scopestack_max;
465	c->savestack = PL_savestack;
466	c->savestack_ix = PL_savestack_ix;
467	c->savestack_max = PL_savestack_max;
468	c->retstack = PL_retstack;
469	c->retstack_ix = PL_retstack_ix;
470	c->retstack_max = PL_retstack_max;
471	c->curcop = PL_curcop;
472	c->top_env = PL_top_env;
473	}	446	}
474		447
475	/*	448	/*
476	* allocate various perl stacks. This is an exact copy	449	* allocate various perl stacks. This is an exact copy
477	* of perl.c:init_stacks, except that it uses less memory	450	* of perl.c:init_stacks, except that it uses less memory
478	* on the (sometimes correct) assumption that coroutines do	451	* on the (sometimes correct) assumption that coroutines do
479	* not usually need a lot of stackspace.	452	* not usually need a lot of stackspace.
480	*/	453	*/
481	STATIC void	454	#if CORO_PREFER_PERL_FUNCTIONS
		455	# define coro_init_stacks init_stacks
		456	#else
		457	static void
482	coro_init_stacks (pTHX)	458	coro_init_stacks (pTHX)
483	{	459	{
484	LOCK;
485
486	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	460	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
487	PL_curstackinfo->si_type = PERLSI_MAIN;	461	PL_curstackinfo->si_type = PERLSI_MAIN;
488	PL_curstack = PL_curstackinfo->si_stack;	462	PL_curstack = PL_curstackinfo->si_stack;
489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	463	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
490		464
491	PL_stack_base = AvARRAY(PL_curstack);	465	PL_stack_base = AvARRAY(PL_curstack);
492	PL_stack_sp = PL_stack_base;	466	PL_stack_sp = PL_stack_base;
493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	467	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
494		468
495	New(50,PL_tmps_stack,96,SV*);	469	New(50,PL_tmps_stack,128,SV*);
496	PL_tmps_floor = -1;	470	PL_tmps_floor = -1;
497	PL_tmps_ix = -1;	471	PL_tmps_ix = -1;
498	PL_tmps_max = 96;	472	PL_tmps_max = 128;
499		473
500	New(54,PL_markstack,16,I32);	474	New(54,PL_markstack,32,I32);
501	PL_markstack_ptr = PL_markstack;	475	PL_markstack_ptr = PL_markstack;
502	PL_markstack_max = PL_markstack + 16;	476	PL_markstack_max = PL_markstack + 32;
503		477
504	#ifdef SET_MARK_OFFSET	478	#ifdef SET_MARK_OFFSET
505	SET_MARK_OFFSET;	479	SET_MARK_OFFSET;
506	#endif	480	#endif
507		481
508	New(54,PL_scopestack,16,I32);	482	New(54,PL_scopestack,32,I32);
509	PL_scopestack_ix = 0;	483	PL_scopestack_ix = 0;
510	PL_scopestack_max = 16;	484	PL_scopestack_max = 32;
511		485
512	New(54,PL_savestack,96,ANY);	486	New(54,PL_savestack,64,ANY);
513	PL_savestack_ix = 0;	487	PL_savestack_ix = 0;
514	PL_savestack_max = 96;	488	PL_savestack_max = 64;
515		489
		490	#if !PERL_VERSION_ATLEAST (5,9,0)
516	New(54,PL_retstack,8,OP*);	491	New(54,PL_retstack,16,OP*);
517	PL_retstack_ix = 0;	492	PL_retstack_ix = 0;
518	PL_retstack_max = 8;	493	PL_retstack_max = 16;
519		494	#endif
520	UNLOCK;
521	}	495	}
		496	#endif
522		497
523	/*	498	/*
524	* destroy the stacks, the callchain etc...	499	* destroy the stacks, the callchain etc...
525	*/	500	*/
526	STATIC void	501	static void
527	destroy_stacks(pTHX)	502	coro_destroy_stacks (pTHX)
528	{	503	{
529	if (!IN_DESTRUCT)	504	if (!IN_DESTRUCT)
530	{	505	{
531	/* is this ugly, I ask? */	506	/* restore all saved variables and stuff */
532	LEAVE_SCOPE (0);	507	LEAVE_SCOPE (0);
		508	assert (PL_tmps_floor == -1);
533		509
534	/* sure it is, but more important: is it correct?? :/ */	510	/* free all temporaries */
535	FREETMPS;	511	FREETMPS;
		512	assert (PL_tmps_ix == -1);
		513
		514	/* unwind all extra stacks */
		515	POPSTACK_TO (PL_mainstack);
		516
		517	/* unwind main stack */
		518	dounwind (-1);
536	}	519	}
537		520
538	while (PL_curstackinfo->si_next)	521	while (PL_curstackinfo->si_next)
539	PL_curstackinfo = PL_curstackinfo->si_next;	522	PL_curstackinfo = PL_curstackinfo->si_next;
540		523
541	while (PL_curstackinfo)	524	while (PL_curstackinfo)
542	{	525	{
543	PERL_SI *p = PL_curstackinfo->si_prev;	526	PERL_SI *p = PL_curstackinfo->si_prev;
544		527
545	{
546	dSP;
547	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
548	PUTBACK; /* possibly superfluous */
549	}
550
551	if (!IN_DESTRUCT)	528	if (!IN_DESTRUCT)
552	{
553	dounwind(-1);
554	SvREFCNT_dec(PL_curstackinfo->si_stack);	529	SvREFCNT_dec (PL_curstackinfo->si_stack);
555	}
556		530
557	Safefree(PL_curstackinfo->si_cxstack);	531	Safefree (PL_curstackinfo->si_cxstack);
558	Safefree(PL_curstackinfo);	532	Safefree (PL_curstackinfo);
559	PL_curstackinfo = p;	533	PL_curstackinfo = p;
560	}	534	}
561		535
562	Safefree(PL_tmps_stack);	536	Safefree (PL_tmps_stack);
563	Safefree(PL_markstack);	537	Safefree (PL_markstack);
564	Safefree(PL_scopestack);	538	Safefree (PL_scopestack);
565	Safefree(PL_savestack);	539	Safefree (PL_savestack);
		540	#if !PERL_VERSION_ATLEAST (5,9,0)
566	Safefree(PL_retstack);	541	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
580	if (alloc)
581	{
582	#if HAVE_MMAP
583	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
584	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
585	if (stack->sptr == (void *)-1)
586	#endif	542	#endif
587	{
588	/FIXME//D//* reasonable stack size! */
589	stack->ssize = - (8192 * sizeof (long));
590	New (0, stack->sptr, 8192, long);
591	}
592	}
593	else
594	stack->sptr = 0;
595
596	ctx->stack = stack;
597	}	543	}
598		544
599	static void	545	/ coroutine stack handling **********************************************/
600	deallocate_stack (Coro__State ctx)
601	{
602	coro_stack *stack = ctx->stack;
603		546
604	ctx->stack = 0;
605
606	if (stack)
607	{
608	if (!--stack->refcnt)
609	{
610	#ifdef HAVE_MMAP
611	if (stack->ssize > 0 && stack->sptr)
612	munmap (stack->sptr, stack->ssize);
613	else
614	#endif
615	Safefree (stack->sptr);
616
617	Safefree (stack);
618	}
619	else if (ctx->gencnt == stack->gencnt)
620	--stack->usecnt;
621	}
622	}
623
624	static void	547	static void
625	setup_coro (void *arg)	548	setup_coro (pTHX_ struct coro *coro)
626	{	549	{
627	/*	550	/*
628	* emulate part of the perl startup here.	551	* emulate part of the perl startup here.
629	*/	552	*/
		553	coro_init_stacks (aTHX);
		554
		555	PL_curcop = &PL_compiling;
		556	PL_in_eval = EVAL_NULL;
		557	PL_comppad = 0;
		558	PL_curpm = 0;
		559	PL_localizing = 0;
		560	PL_dirty = 0;
		561	PL_restartop = 0;
		562
		563	{
		564	dSP;
		565	LOGOP myop;
		566
		567	SvREFCNT_dec (GvAV (PL_defgv));
		568	GvAV (PL_defgv) = coro->args; coro->args = 0;
		569
		570	Zero (&myop, 1, LOGOP);
		571	myop.op_next = Nullop;
		572	myop.op_flags = OPf_WANT_VOID;
		573
		574	PUSHMARK (SP);
		575	XPUSHs (av_shift (GvAV (PL_defgv)));
		576	PUTBACK;
		577	PL_op = (OP *)&myop;
		578	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		579	SPAGAIN;
		580	}
		581
		582	ENTER; /* necessary e.g. for dounwind */
		583	}
		584
		585	static void
		586	free_coro_mortal (pTHX)
		587	{
		588	if (coro_mortal)
		589	{
		590	SvREFCNT_dec (coro_mortal);
		591	coro_mortal = 0;
		592	}
		593	}
		594
		595	/* inject a fake call to Coro::State::_cctx_init into the execution */
		596	/* _cctx_init should be careful, as it could be called at almost any time */
		597	/* during execution of a perl program */
		598	static void NOINLINE
		599	prepare_cctx (pTHX_ coro_cctx *cctx)
		600	{
630	dSP;	601	dSP;
631	Coro__State ctx = (Coro__State)arg;	602	LOGOP myop;
632	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
633		603
634	coro_init_stacks (aTHX);	604	Zero (&myop, 1, LOGOP);
635	/PL_curcop = 0;/	605	myop.op_next = PL_op;
636	/PL_in_eval = PL_in_eval;/ /* inherit */	606	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
637	SvREFCNT_dec (GvAV (PL_defgv));
638	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
639		607
		608	PUSHMARK (SP);
		609	EXTEND (SP, 2);
		610	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		611	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		612	PUTBACK;
		613	PL_op = (OP *)&myop;
		614	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
640	SPAGAIN;	615	SPAGAIN;
		616	}
641		617
642	if (ctx->stack)	618	/*
643	{	619	* this is a _very_ stripped down perl interpreter ;)
644	ctx->cursp = 0;	620	*/
		621	static void
		622	coro_run (void *arg)
		623	{
		624	dTHX;
645		625
646	PUSHMARK(SP);	626	/* coro_run is the alternative tail of transfer(), so unlock here. */
647	PUTBACK;	627	UNLOCK;
648	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
649		628
650	if (SvTRUE (ERRSV))	629	PL_top_env = &PL_start_env;
651	croak (NULL);	630
652	else	631	/* inject a fake subroutine call to cctx_init */
653	croak ("FATAL: CCTXT coroutine returned!");	632	prepare_cctx (aTHX_ (coro_cctx *)arg);
		633
		634	/* somebody or something will hit me for both perl_run and PL_restartop */
		635	PL_restartop = PL_op;
		636	perl_run (PL_curinterp);
		637
		638	/*
		639	* If perl-run returns we assume exit() was being called or the coro
		640	* fell off the end, which seems to be the only valid (non-bug)
		641	* reason for perl_run to return. We try to exit by jumping to the
		642	* bootstrap-time "top" top_env, as we cannot restore the "main"
		643	* coroutine as Coro has no such concept
		644	*/
		645	PL_top_env = main_top_env;
		646	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		647	}
		648
		649	static coro_cctx *
		650	cctx_new ()
		651	{
		652	coro_cctx *cctx;
		653	void *stack_start;
		654	size_t stack_size;
		655
		656	++cctx_count;
		657
		658	Newz (0, cctx, 1, coro_cctx);
		659
		660	#if HAVE_MMAP
		661
		662	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		663	/* mmap supposedly does allocate-on-write for us */
		664	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		665
		666	if (cctx->sptr != (void *)-1)
		667	{
		668	# if CORO_STACKGUARD
		669	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		670	# endif
		671	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		672	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		673	cctx->mapped = 1;
654	}	674	}
655	else	675	else
656	{	676	#endif
657	UNOP myop;
658
659	PL_op = (OP *)&myop;
660
661	Zero(&myop, 1, UNOP);
662	myop.op_next = Nullop;
663	myop.op_flags = OPf_WANT_VOID;
664
665	PUSHMARK(SP);
666	XPUSHs (sub_init);
667	/*
668	* the next line is slightly wrong, as PL_op->op_next
669	* is actually being executed so we skip the first op.
670	* that doesn't matter, though, since it is only
671	* pp_nextstate and we never return...
672	* ah yes, and I don't care anyways ;)
673	*/
674	PUTBACK;
675	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
676	SPAGAIN;
677
678	ENTER; /* necessary e.g. for dounwind */
679	}	677	{
680	}	678	cctx->ssize = coro_stacksize * (long)sizeof (long);
		679	New (0, cctx->sptr, coro_stacksize, long);
681		680
682	static void	681	if (!cctx->sptr)
683	continue_coro (void *arg)	682	{
684	{	683	perror ("FATAL: unable to allocate stack for coroutine");
685	/*	684	_exit (EXIT_FAILURE);
686	* this is a _very_ stripped down perl interpreter ;)	685	}
687	*/
688	Coro__State ctx = (Coro__State)arg;
689	JMPENV coro_start_env;
690		686
691	PL_top_env = &ctx->start_env;	687	stack_start = cctx->sptr;
		688	stack_size = cctx->ssize;
		689	}
692		690
693	ctx->cursp = 0;	691	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		692	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		693
		694	return cctx;
		695	}
		696
		697	static void
		698	cctx_destroy (coro_cctx *cctx)
		699	{
		700	if (!cctx)
		701	return;
		702
		703	--cctx_count;
		704
		705	#if CORO_USE_VALGRIND
		706	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		707	#endif
		708
		709	#if HAVE_MMAP
		710	if (cctx->mapped)
		711	munmap (cctx->sptr, cctx->ssize);
		712	else
		713	#endif
		714	Safefree (cctx->sptr);
		715
		716	Safefree (cctx);
		717	}
		718
		719	static coro_cctx *
		720	cctx_get (pTHX)
		721	{
		722	while (cctx_first)
		723	{
		724	coro_cctx *cctx = cctx_first;
		725	cctx_first = cctx->next;
		726	--cctx_idle;
		727
		728	if (cctx->ssize >= coro_stacksize)
		729	return cctx;
		730
		731	cctx_destroy (cctx);
		732	}
		733
694	PL_op = PL_op->op_next;	734	PL_op = PL_op->op_next;
695	CALLRUNOPS(aTHX);	735	return cctx_new ();
696
697	abort ();
698	}	736	}
699		737
700	STATIC void	738	static void
		739	cctx_put (coro_cctx *cctx)
		740	{
		741	/* free another cctx if overlimit */
		742	if (cctx_idle >= MAX_IDLE_CCTX)
		743	{
		744	coro_cctx *first = cctx_first;
		745	cctx_first = first->next;
		746	--cctx_idle;
		747
		748	assert (!first->inuse);
		749	cctx_destroy (first);
		750	}
		751
		752	++cctx_idle;
		753	cctx->next = cctx_first;
		754	cctx_first = cctx;
		755	}
		756
		757	/ coroutine switching ***************************************************/
		758
		759	/* never call directly, always through the coro_state_transfer global variable */
		760	static void NOINLINE
701	transfer (pTHX_ struct coro prev, struct coro next, int flags)	761	transfer (pTHX_ struct coro prev, struct coro next)
702	{	762	{
703	dSTACKLEVEL;	763	dSTACKLEVEL;
704		764
		765	/* sometimes transfer is only called to set idle_sp */
		766	if (!next)
		767	{
		768	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		769	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		770	}
705	if (prev != next)	771	else if (prev != next)
706	{	772	{
707	if (next->mainstack)	773	coro_cctx *prev__cctx;
		774
		775	if (prev->flags & CF_NEW)
708	{	776	{
709	LOCK;	777	/* create a new empty context */
710	SAVE (prev, flags);	778	Newz (0, prev->cctx, 1, coro_cctx);
711	LOAD (next);	779	prev->cctx->inuse = 1;
712	UNLOCK;	780	prev->flags &= ~CF_NEW;
713		781	prev->flags \|= CF_RUNNING;
714	/* mark this state as in-use */
715	next->mainstack = 0;
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	prev->cursp = stacklevel;
742	/* don't add any code here */
743	}
744	else
745	next->cursp = stacklevel;
746	}	782	}
747	else if (next->tmps_ix == -2)	783
748	croak ("tried to transfer to running coroutine");	784	/TODO: must not croak here /
		785	if (!prev->flags & CF_RUNNING)
		786	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		787
		788	if (next->flags & CF_RUNNING)
		789	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		790
		791	if (next->flags & CF_DESTROYED)
		792	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		793
		794	prev->flags &= ~CF_RUNNING;
		795	next->flags \|= CF_RUNNING;
		796
		797	LOCK;
		798
		799	if (next->flags & CF_NEW)
		800	{
		801	/* need to start coroutine */
		802	next->flags &= ~CF_NEW;
		803	/* first get rid of the old state */
		804	save_perl (aTHX_ prev);
		805	/* setup coroutine call */
		806	setup_coro (aTHX_ next);
		807	/* need a new stack */
		808	assert (!next->cctx);
		809	}
749	else	810	else
750	{	811	{
751	LOCK;	812	/* coroutine already started */
752	SAVE (prev, -1); /* first get rid of the old state */	813	save_perl (aTHX_ prev);
753	UNLOCK;	814	load_perl (aTHX_ next);
754
755	if (flags & TRANSFER_SAVE_CCTXT)
756	{
757	if (!prev->stack)
758	allocate_stack (prev, 0);
759
760	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
761	{
762	PL_top_env = &next->start_env;
763
764	setup_coro (next);
765	next->cursp = stacklevel;
766
767	prev->stack->refcnt++;
768	prev->stack->usecnt++;
769	next->stack = prev->stack;
770	next->gencnt = prev->gencnt;
771	}
772	else
773	{
774	assert (!next->stack);
775	allocate_stack (next, 1);
776	coro_create (&(next->stack->cctx),
777	setup_coro, (void *)next,
778	next->stack->sptr, labs (next->stack->ssize));
779	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
780	prev->cursp = stacklevel;
781	/* don't add any code here */
782	}
783	}
784	else
785	{
786	setup_coro (next);
787	next->cursp = stacklevel;
788	}
789	}	815	}
790	}
791		816
792	LOCK;	817	prev__cctx = prev->cctx;
793	if (coro_mortal)	818
794	{	819	/* possibly "free" the cctx */
795	SvREFCNT_dec (coro_mortal);	820	if (prev__cctx->idle_sp == STACKLEVEL)
796	coro_mortal = 0;	821	{
797	}	822	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		823	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		824
		825	prev->cctx = 0;
		826
		827	cctx_put (prev__cctx);
		828	prev__cctx->inuse = 0;
		829	}
		830
		831	if (!next->cctx)
		832	{
		833	next->cctx = cctx_get (aTHX);
		834	assert (!next->cctx->inuse);
		835	next->cctx->inuse = 1;
		836	}
		837
		838	if (prev__cctx != next->cctx)
		839	{
		840	prev__cctx->top_env = PL_top_env;
		841	PL_top_env = next->cctx->top_env;
		842	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		843	}
		844
		845	free_coro_mortal (aTHX);
798	UNLOCK;	846	UNLOCK;
		847	}
799	}	848	}
800		849
801	#define SV_CORO(sv,func) \	850	struct transfer_args
802	do { \	851	{
803	if (SvROK (sv)) \	852	struct coro prev, next;
804	sv = SvRV (sv); \	853	};
805	\
806	if (SvTYPE (sv) == SVt_PVHV) \
807	{ \
808	HE he = hv_fetch_ent ((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
809	\
810	if (!he) \
811	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
812	\
813	(sv) = SvRV (HeVAL(he)); \
814	} \
815	\
816	/* must also be changed inside Coro::Cont::yield */ \
817	if (!SvOBJECT (sv) \|\| SvSTASH (sv) != coro_state_stash) \
818	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
819	\
820	} while(0)
821		854
822	#define SvSTATE(sv) (struct coro *)SvIV (sv)	855	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
823		856
		857	/ high level stuff ******************************************************/
		858
824	static void	859	static int
		860	coro_state_destroy (pTHX_ struct coro *coro)
		861	{
		862	if (coro->flags & CF_DESTROYED)
		863	return 0;
		864
		865	coro->flags \|= CF_DESTROYED;
		866
		867	if (coro->flags & CF_READY)
		868	{
		869	/* reduce nready, as destroying a ready coro effectively unreadies it */
		870	/* alternative: look through all ready queues and remove the coro */
		871	LOCK;
		872	--coro_nready;
		873	UNLOCK;
		874	}
		875	else
		876	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
		877
		878	if (coro->mainstack && coro->mainstack != main_mainstack)
		879	{
		880	struct coro temp;
		881
		882	assert (!(coro->flags & CF_RUNNING));
		883
		884	Zero (&temp, 1, struct coro);
		885	temp.save = CORO_SAVE_ALL;
		886
		887	if (coro->flags & CF_RUNNING)
		888	croak ("FATAL: tried to destroy currently running coroutine");
		889
		890	save_perl (aTHX_ &temp);
		891	load_perl (aTHX_ coro);
		892
		893	coro_destroy_stacks (aTHX);
		894
		895	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		896
		897	coro->mainstack = 0;
		898	}
		899
		900	cctx_destroy (coro->cctx);
		901	SvREFCNT_dec (coro->args);
		902
		903	if (coro->next) coro->next->prev = coro->prev;
		904	if (coro->prev) coro->prev->next = coro->next;
		905	if (coro == first) first = coro->next;
		906
		907	return 1;
		908	}
		909
		910	static int
		911	coro_state_free (pTHX_ SV sv, MAGIC mg)
		912	{
		913	struct coro coro = (struct coro )mg->mg_ptr;
		914	mg->mg_ptr = 0;
		915
		916	coro->hv = 0;
		917
		918	if (--coro->refcnt < 0)
		919	{
		920	coro_state_destroy (aTHX_ coro);
		921	Safefree (coro);
		922	}
		923
		924	return 0;
		925	}
		926
		927	static int
		928	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		929	{
		930	struct coro coro = (struct coro )mg->mg_ptr;
		931
		932	++coro->refcnt;
		933
		934	return 0;
		935	}
		936
		937	static MGVTBL coro_state_vtbl = {
		938	0, 0, 0, 0,
		939	coro_state_free,
		940	0,
		941	#ifdef MGf_DUP
		942	coro_state_dup,
		943	#else
		944	# define MGf_DUP 0
		945	#endif
		946	};
		947
		948	static struct coro *
		949	SvSTATE_ (pTHX_ SV *coro)
		950	{
		951	HV *stash;
		952	MAGIC *mg;
		953
		954	if (SvROK (coro))
		955	coro = SvRV (coro);
		956
		957	stash = SvSTASH (coro);
		958	if (stash != coro_stash && stash != coro_state_stash)
		959	{
		960	/* very slow, but rare, check */
		961	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		962	croak ("Coro::State object required");
		963	}
		964
		965	mg = CORO_MAGIC (coro);
		966	return (struct coro *)mg->mg_ptr;
		967	}
		968
		969	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		970
		971	static void
		972	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		973	{
		974	ta->prev = SvSTATE (prev_sv);
		975	ta->next = SvSTATE (next_sv);
		976	}
		977
		978	static void
825	api_transfer(pTHX_ SV prev, SV next, int flags)	979	api_transfer (SV prev_sv, SV next_sv)
826	{	980	{
827	SV_CORO (prev, "Coro::transfer");	981	dTHX;
828	SV_CORO (next, "Coro::transfer");	982	struct transfer_args ta;
829		983
830	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	984	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		985	TRANSFER (ta);
		986	}
		987
		988	static int
		989	api_save (SV *coro_sv, int new_save)
		990	{
		991	dTHX;
		992	struct coro *coro = SvSTATE (coro_sv);
		993	int old_save = coro->save;
		994
		995	if (new_save >= 0)
		996	coro->save = new_save;
		997
		998	return old_save;
831	}	999	}
832		1000
833	/ Coro ******************************************************************/	1001	/ Coro ******************************************************************/
834		1002
835	#define PRIO_MAX 3
836	#define PRIO_HIGH 1
837	#define PRIO_NORMAL 0
838	#define PRIO_LOW -1
839	#define PRIO_IDLE -3
840	#define PRIO_MIN -4
841
842	/* for Coro.pm */
843	static GV coro_current, coro_idle;
844	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
845	static int coro_nready;
846
847	static void	1003	static void
848	coro_enq (SV *sv)	1004	coro_enq (pTHX_ SV *coro_sv)
849	{	1005	{
850	if (SvTYPE (sv) == SVt_PVHV)
851	{
852	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
853	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
854
855	prio = prio > PRIO_MAX ? PRIO_MAX
856	: prio < PRIO_MIN ? PRIO_MIN
857	: prio;
858
859	av_push (coro_ready [prio - PRIO_MIN], sv);	1006	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
860	coro_nready++;
861
862	return;
863	}
864
865	croak ("Coro::ready tried to enqueue something that is not a coroutine");
866	}	1007	}
867		1008
868	static SV *	1009	static SV *
869	coro_deq (int min_prio)	1010	coro_deq (pTHX_ int min_prio)
870	{	1011	{
871	int prio = PRIO_MAX - PRIO_MIN;	1012	int prio = PRIO_MAX - PRIO_MIN;
872		1013
873	min_prio -= PRIO_MIN;	1014	min_prio -= PRIO_MIN;
874	if (min_prio < 0)	1015	if (min_prio < 0)
875	min_prio = 0;	1016	min_prio = 0;
876		1017
877	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1018	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
878	if (av_len (coro_ready[prio]) >= 0)	1019	if (AvFILLp (coro_ready [prio]) >= 0)
879	{
880	coro_nready--;
881	return av_shift (coro_ready[prio]);	1020	return av_shift (coro_ready [prio]);
882	}
883		1021
884	return 0;	1022	return 0;
885	}	1023	}
886		1024
887	static void	1025	static int
888	api_ready (SV *coro)	1026	api_ready (SV *coro_sv)
889	{	1027	{
		1028	dTHX;
		1029	struct coro *coro;
		1030
890	if (SvROK (coro))	1031	if (SvROK (coro_sv))
891	coro = SvRV (coro);	1032	coro_sv = SvRV (coro_sv);
		1033
		1034	coro = SvSTATE (coro_sv);
		1035
		1036	if (coro->flags & CF_READY)
		1037	return 0;
		1038
		1039	coro->flags \|= CF_READY;
892		1040
893	LOCK;	1041	LOCK;
894	coro_enq (SvREFCNT_inc (coro));	1042	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1043	++coro_nready;
895	UNLOCK;	1044	UNLOCK;
		1045
		1046	return 1;
		1047	}
		1048
		1049	static int
		1050	api_is_ready (SV *coro_sv)
		1051	{
		1052	dTHX;
		1053	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1054	}
		1055
		1056	static void
		1057	prepare_schedule (pTHX_ struct transfer_args *ta)
		1058	{
		1059	SV prev_sv, next_sv;
		1060
		1061	for (;;)
		1062	{
		1063	LOCK;
		1064	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1065
		1066	/* nothing to schedule: call the idle handler */
		1067	if (!next_sv)
		1068	{
		1069	dSP;
		1070	UNLOCK;
		1071
		1072	ENTER;
		1073	SAVETMPS;
		1074
		1075	PUSHMARK (SP);
		1076	PUTBACK;
		1077	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1078
		1079	FREETMPS;
		1080	LEAVE;
		1081	continue;
		1082	}
		1083
		1084	ta->next = SvSTATE (next_sv);
		1085
		1086	/* cannot transfer to destroyed coros, skip and look for next */
		1087	if (ta->next->flags & CF_DESTROYED)
		1088	{
		1089	UNLOCK;
		1090	SvREFCNT_dec (next_sv);
		1091	/* coro_nready is already taken care of by destroy */
		1092	continue;
		1093	}
		1094
		1095	--coro_nready;
		1096	UNLOCK;
		1097	break;
		1098	}
		1099
		1100	/* free this only after the transfer */
		1101	prev_sv = SvRV (coro_current);
		1102	SvRV_set (coro_current, next_sv);
		1103	ta->prev = SvSTATE (prev_sv);
		1104
		1105	assert (ta->next->flags & CF_READY);
		1106	ta->next->flags &= ~CF_READY;
		1107
		1108	LOCK;
		1109	free_coro_mortal (aTHX);
		1110	coro_mortal = prev_sv;
		1111	UNLOCK;
		1112	}
		1113
		1114	static void
		1115	prepare_cede (pTHX_ struct transfer_args *ta)
		1116	{
		1117	api_ready (coro_current);
		1118	prepare_schedule (aTHX_ ta);
		1119	}
		1120
		1121	static int
		1122	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1123	{
		1124	if (coro_nready)
		1125	{
		1126	SV *prev = SvRV (coro_current);
		1127	prepare_schedule (aTHX_ ta);
		1128	api_ready (prev);
		1129	return 1;
		1130	}
		1131	else
		1132	return 0;
896	}	1133	}
897		1134
898	static void	1135	static void
899	api_schedule (void)	1136	api_schedule (void)
900	{	1137	{
901	SV prev, next;	1138	dTHX;
		1139	struct transfer_args ta;
902		1140
903	LOCK;	1141	prepare_schedule (aTHX_ &ta);
904		1142	TRANSFER (ta);
905	prev = SvRV (GvSV (coro_current));
906	next = coro_deq (PRIO_MIN);
907
908	if (!next)
909	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
910
911	/* free this only after the transfer */
912	coro_mortal = prev;
913	SV_CORO (prev, "Coro::schedule");
914
915	SvRV (GvSV (coro_current)) = next;
916
917	SV_CORO (next, "Coro::schedule");
918
919	UNLOCK;
920
921	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
922	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
923	}	1143	}
924		1144
925	static void	1145	static int
926	api_cede (void)	1146	api_cede (void)
927	{	1147	{
928	LOCK;	1148	dTHX;
929	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1149	struct transfer_args ta;
930	UNLOCK;
931		1150
932	api_schedule ();	1151	prepare_cede (aTHX_ &ta);
		1152
		1153	if (ta.prev != ta.next)
		1154	{
		1155	TRANSFER (ta);
		1156	return 1;
		1157	}
		1158	else
		1159	return 0;
		1160	}
		1161
		1162	static int
		1163	api_cede_notself (void)
		1164	{
		1165	dTHX;
		1166	struct transfer_args ta;
		1167
		1168	if (prepare_cede_notself (aTHX_ &ta))
		1169	{
		1170	TRANSFER (ta);
		1171	return 1;
		1172	}
		1173	else
		1174	return 0;
933	}	1175	}
934		1176
935	MODULE = Coro::State PACKAGE = Coro::State	1177	MODULE = Coro::State PACKAGE = Coro::State
936		1178
937	PROTOTYPES: ENABLE	1179	PROTOTYPES: DISABLE
938		1180
939	BOOT:	1181	BOOT:
940	{ /* {} necessary for stoopid perl-5.6.x */	1182	{
941	#ifdef USE_ITHREADS	1183	#ifdef USE_ITHREADS
942	MUTEX_INIT (&coro_mutex);	1184	MUTEX_INIT (&coro_mutex);
943	#endif	1185	#endif
		1186	BOOT_PAGESIZE;
944		1187
945	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
946	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
947	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1188	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
948		1189
949	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1190	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
950	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1191	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
951	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1192	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1193	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1194	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
952	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1195	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1196	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
953		1197
954	main_mainstack = PL_mainstack;	1198	main_mainstack = PL_mainstack;
		1199	main_top_env = PL_top_env;
		1200
		1201	while (main_top_env->je_prev)
		1202	main_top_env = main_top_env->je_prev;
955		1203
956	coroapi.ver = CORO_API_VERSION;	1204	coroapi.ver = CORO_API_VERSION;
957	coroapi.transfer = api_transfer;	1205	coroapi.transfer = api_transfer;
958	}
959		1206
960	Coro::State	1207	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
961	_newprocess(args)	1208	}
962	SV * args	1209
963	PROTOTYPE: $	1210	SV *
		1211	new (char *klass, ...)
964	CODE:	1212	CODE:
965	Coro__State coro;	1213	{
		1214	struct coro *coro;
		1215	HV *hv;
		1216	int i;
966		1217
967	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
968	croak ("Coro::State::_newprocess expects an arrayref");
969
970	Newz (0, coro, 1, struct coro);	1218	Newz (0, coro, 1, struct coro);
		1219	coro->args = newAV ();
		1220	coro->save = CORO_SAVE_DEF;
		1221	coro->flags = CF_NEW;
971		1222
972	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1223	if (first) first->prev = coro;
973	coro->mainstack = 0; /* actual work is done inside transfer */	1224	coro->next = first;
974	coro->stack = 0;	1225	first = coro;
975		1226
976	/* same as JMPENV_BOOTSTRAP */	1227	coro->hv = hv = newHV ();
977	/* we might be able to recycle start_env, but safe is safe */	1228	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
978	//Zero(&coro->start_env, 1, JMPENV);	1229	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
979	coro->start_env.je_ret = -1;
980	coro->start_env.je_mustcatch = TRUE;
981		1230
982	RETVAL = coro;	1231	for (i = 1; i < items; i++)
		1232	av_push (coro->args, newSVsv (ST (i)));
		1233	}
983	OUTPUT:	1234	OUTPUT:
984	RETVAL	1235	RETVAL
985		1236
		1237	int
		1238	save (SV *coro, int new_save = -1)
		1239	CODE:
		1240	RETVAL = api_save (coro, new_save);
		1241	OUTPUT:
		1242	RETVAL
		1243
		1244	int
		1245	save_also (SV *coro_sv, int save_also)
		1246	CODE:
		1247	{
		1248	struct coro *coro = SvSTATE (coro_sv);
		1249	RETVAL = coro->save;
		1250	coro->save \|= save_also;
		1251	}
		1252	OUTPUT:
		1253	RETVAL
		1254
986	void	1255	void
987	transfer(prev, next, flags)	1256	_set_stacklevel (...)
988	SV *prev	1257	ALIAS:
989	SV *next	1258	Coro::State::transfer = 1
990	int flags	1259	Coro::schedule = 2
991	PROTOTYPE: @	1260	Coro::cede = 3
		1261	Coro::cede_notself = 4
992	CODE:	1262	CODE:
993	PUTBACK;	1263	{
994	SV_CORO (next, "Coro::transfer");	1264	struct transfer_args ta;
995	SV_CORO (prev, "Coro::transfer");	1265
996	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1266	switch (ix)
997	SPAGAIN;	1267	{
		1268	case 0:
		1269	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1270	ta.next = 0;
		1271	break;
		1272
		1273	case 1:
		1274	if (items != 2)
		1275	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1276
		1277	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1278	break;
		1279
		1280	case 2:
		1281	prepare_schedule (aTHX_ &ta);
		1282	break;
		1283
		1284	case 3:
		1285	prepare_cede (aTHX_ &ta);
		1286	break;
		1287
		1288	case 4:
		1289	if (!prepare_cede_notself (aTHX_ &ta))
		1290	XSRETURN_EMPTY;
		1291
		1292	break;
		1293	}
		1294
		1295	BARRIER;
		1296	TRANSFER (ta);
		1297
		1298	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1299	XSRETURN_YES;
		1300	}
		1301
		1302	bool
		1303	_destroy (SV *coro_sv)
		1304	CODE:
		1305	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1306	OUTPUT:
		1307	RETVAL
998		1308
999	void	1309	void
1000	DESTROY(coro)
1001	Coro::State coro
1002	CODE:
1003
1004	if (coro->mainstack && coro->mainstack != main_mainstack)
1005	{
1006	struct coro temp;
1007
1008	PUTBACK;
1009	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
1010	LOAD(aTHX_ coro);
1011	SPAGAIN;
1012
1013	destroy_stacks (aTHX);
1014
1015	LOAD((&temp)); /* this will get rid of defsv etc.. */
1016	SPAGAIN;
1017
1018	coro->mainstack = 0;
1019	}
1020
1021	deallocate_stack (coro);
1022	SvREFCNT_dec (coro->args);
1023	Safefree (coro);
1024
1025	void
1026	_exit(code)	1310	_exit (code)
1027	int code	1311	int code
1028	PROTOTYPE: $	1312	PROTOTYPE: $
1029	CODE:	1313	CODE:
1030	_exit (code);	1314	_exit (code);
1031		1315
1032	MODULE = Coro::State PACKAGE = Coro::Cont	1316	int
		1317	cctx_stacksize (int new_stacksize = 0)
		1318	CODE:
		1319	RETVAL = coro_stacksize;
		1320	if (new_stacksize)
		1321	coro_stacksize = new_stacksize;
		1322	OUTPUT:
		1323	RETVAL
1033		1324
1034	# this is slightly dirty (should expose a c-level api)	1325	int
		1326	cctx_count ()
		1327	CODE:
		1328	RETVAL = cctx_count;
		1329	OUTPUT:
		1330	RETVAL
		1331
		1332	int
		1333	cctx_idle ()
		1334	CODE:
		1335	RETVAL = cctx_idle;
		1336	OUTPUT:
		1337	RETVAL
1035		1338
1036	void	1339	void
1037	yield(...)	1340	list ()
1038	PROTOTYPE: @	1341	PPCODE:
1039	CODE:	1342	{
1040	static SV *returnstk;	1343	struct coro *coro;
1041	SV *sv;	1344	for (coro = first; coro; coro = coro->next)
1042	AV *defav = GvAV (PL_defgv);	1345	if (coro->hv)
1043	struct coro prev, next;	1346	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1347	}
1044		1348
1045	if (!returnstk)	1349	void
1046	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));	1350	_eval (SV coro_sv, SV coderef)
		1351	CODE:
		1352	{
		1353	struct coro *coro = SvSTATE (coro_sv);
		1354	if (coro->mainstack)
		1355	{
		1356	struct coro temp;
		1357	Zero (&temp, 1, struct coro);
		1358	temp.save = CORO_SAVE_ALL;
1047		1359
1048	/* set up @_ -- ugly */	1360	if (!(coro->flags & CF_RUNNING))
1049	av_clear (defav);	1361	{
1050	av_fill (defav, items - 1);	1362	save_perl (aTHX_ &temp);
1051	while (items--)	1363	load_perl (aTHX_ coro);
1052	av_store (defav, items, SvREFCNT_inc (ST(items)));	1364	}
1053		1365
1054	mg_get (returnstk); /* isn't documentation wrong for mg_get? */	1366	{
1055	sv = av_pop ((AV *)SvRV (returnstk));	1367	dSP;
1056	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));	1368	ENTER;
1057	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));	1369	SAVETMPS;
1058	SvREFCNT_dec (sv);	1370	PUSHMARK (SP);
		1371	PUTBACK;
		1372	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1373	SPAGAIN;
		1374	FREETMPS;
		1375	LEAVE;
		1376	PUTBACK;
		1377	}
1059		1378
1060	transfer(aTHX_ prev, next, 0);	1379	if (!(coro->flags & CF_RUNNING))
		1380	{
		1381	save_perl (aTHX_ coro);
		1382	load_perl (aTHX_ &temp);
		1383	}
		1384	}
		1385	}
		1386
		1387	SV *
		1388	is_ready (SV *coro_sv)
		1389	PROTOTYPE: $
		1390	ALIAS:
		1391	is_ready = CF_READY
		1392	is_running = CF_RUNNING
		1393	is_new = CF_NEW
		1394	is_destroyed = CF_DESTROYED
		1395	CODE:
		1396	struct coro *coro = SvSTATE (coro_sv);
		1397	RETVAL = boolSV (coro->flags & ix);
		1398	OUTPUT:
		1399	RETVAL
		1400
1061		1401
1062	MODULE = Coro::State PACKAGE = Coro	1402	MODULE = Coro::State PACKAGE = Coro
1063		1403
1064	# this is slightly dirty (should expose a c-level api)
1065
1066	BOOT:	1404	BOOT:
1067	{	1405	{
1068	int i;	1406	int i;
		1407
1069	HV *stash = gv_stashpv ("Coro", TRUE);	1408	coro_stash = gv_stashpv ("Coro", TRUE);
1070		1409
1071	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1410	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1411	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1412	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1413	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1414	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1415	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1077		1416
1078	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1417	coro_current = get_sv ("Coro::current", FALSE);
1079	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1418	SvREADONLY_on (coro_current);
1080		1419
1081	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1420	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1082	coro_ready[i] = newAV ();	1421	coro_ready[i] = newAV ();
1083		1422
1084	{	1423	{
1085	SV *sv = perl_get_sv("Coro::API", 1);	1424	SV *sv = perl_get_sv("Coro::API", 1);
1086		1425
1087	coroapi.schedule = api_schedule;	1426	coroapi.schedule = api_schedule;
		1427	coroapi.save = api_save;
1088	coroapi.cede = api_cede;	1428	coroapi.cede = api_cede;
		1429	coroapi.cede_notself = api_cede_notself;
1089	coroapi.ready = api_ready;	1430	coroapi.ready = api_ready;
		1431	coroapi.is_ready = api_is_ready;
1090	coroapi.nready = &coro_nready;	1432	coroapi.nready = &coro_nready;
1091	coroapi.current = coro_current;	1433	coroapi.current = coro_current;
1092		1434
1093	GCoroAPI = &coroapi;	1435	GCoroAPI = &coroapi;
1094	sv_setiv(sv, (IV)&coroapi);	1436	sv_setiv (sv, (IV)&coroapi);
1095	SvREADONLY_on(sv);	1437	SvREADONLY_on (sv);
1096	}	1438	}
1097	}	1439	}
1098		1440
1099	#if !PERL_MICRO
1100
1101	void	1441	void
1102	ready(self)	1442	_set_current (SV *current)
1103	SV * self
1104	PROTOTYPE: $	1443	PROTOTYPE: $
1105	CODE:	1444	CODE:
1106	api_ready (self);	1445	SvREFCNT_dec (SvRV (coro_current));
1107		1446	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1108	#endif
1109		1447
1110	int	1448	int
		1449	prio (Coro::State coro, int newprio = 0)
		1450	ALIAS:
		1451	nice = 1
		1452	CODE:
		1453	{
		1454	RETVAL = coro->prio;
		1455
		1456	if (items > 1)
		1457	{
		1458	if (ix)
		1459	newprio = coro->prio - newprio;
		1460
		1461	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1462	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1463
		1464	coro->prio = newprio;
		1465	}
		1466	}
		1467	OUTPUT:
		1468	RETVAL
		1469
		1470	SV *
		1471	ready (SV *self)
		1472	PROTOTYPE: $
		1473	CODE:
		1474	RETVAL = boolSV (api_ready (self));
		1475	OUTPUT:
		1476	RETVAL
		1477
		1478	int
1111	nready(...)	1479	nready (...)
1112	PROTOTYPE:	1480	PROTOTYPE:
1113	CODE:	1481	CODE:
1114	RETVAL = coro_nready;	1482	RETVAL = coro_nready;
1115	OUTPUT:	1483	OUTPUT:
1116	RETVAL	1484	RETVAL
1117		1485
		1486	MODULE = Coro::State PACKAGE = Coro::AIO
		1487
		1488	SV *
		1489	_get_state ()
		1490	CODE:
		1491	{
		1492	struct io_state *data;
		1493
		1494	RETVAL = newSV (sizeof (struct io_state));
		1495	data = (struct io_state *)SvPVX (RETVAL);
		1496	SvCUR_set (RETVAL, sizeof (struct io_state));
		1497	SvPOK_only (RETVAL);
		1498
		1499	data->errorno = errno;
		1500	data->laststype = PL_laststype;
		1501	data->laststatval = PL_laststatval;
		1502	data->statcache = PL_statcache;
		1503	}
		1504	OUTPUT:
		1505	RETVAL
		1506
1118	void	1507	void
1119	schedule(...)	1508	_set_state (char *data_)
1120	PROTOTYPE:	1509	PROTOTYPE: $
1121	CODE:	1510	CODE:
1122	api_schedule ();	1511	{
		1512	struct io_state data = (void )data_;
1123		1513
1124	void	1514	errno = data->errorno;
1125	cede(...)	1515	PL_laststype = data->laststype;
1126	PROTOTYPE:	1516	PL_laststatval = data->laststatval;
1127	CODE:	1517	PL_statcache = data->statcache;
1128	api_cede ();	1518	}
1129		1519

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Comparing Coro/Coro/State.xs (file contents): Revision 1.55 by pcg, Thu Apr 1 02:29:05 2004 UTC vs. Revision 1.151 by root, Wed Sep 19 21:39:15 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.55 by pcg, Thu Apr 1 02:29:05 2004 UTC vs.
Revision 1.151 by root, Wed Sep 19 21:39:15 2007 UTC