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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.63 by root, Mon Mar 21 14:35:22 2005 UTC vs.
Revision 1.151 by root, Wed Sep 19 21:39:15 2007 UTC

…		…
		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#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)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <signal.h>	75	/* 5.8.7 */
33		76	#ifndef SvRV_set
34	#ifdef HAVE_MMAP	77	# define SvRV_set(s,v) SvRV(s) = (v)
35	# include <unistd.h>
36	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS
38	# ifdef MAP_ANON
39	# define MAP_ANONYMOUS MAP_ANON
40	# else
41	# undef HAVE_MMAP
42	# endif
43	# endif	78	#endif
44	#endif
45		79
46	#define SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	#define UCORO_STATE "_coro_state"	81	# undef CORO_STACKGUARD
		82	#endif
		83
		84	#ifndef CORO_STACKGUARD
		85	# define CORO_STACKGUARD 0
		86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
48		92
49	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macro should declare a variable stacklevel that contains and approximation
50	* to the current C stack pointer. Its property is that it changes with each call	94	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	95	* and should be unique. */
		96	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	97	#define STACKLEVEL ((void *)&stacklevel)
53		98
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		100
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	101	#if __GNUC__ >= 3
		102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		104	#else
		105	# define attribute(x)
		106	# define BARRIER
		107	#endif
		108
		109	#define NOINLINE attribute ((noinline))
57		110
58	#include "CoroAPI.h"	111	#include "CoroAPI.h"
59		112
60	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	117	#else
65	# define LOCK 0	118	# define LOCK (void)0
66	# define UNLOCK 0	119	# define UNLOCK (void)0
67	#endif	120	#endif
68		121
		122	/* helper storage struct for Coro::AIO */
		123	struct io_state
		124	{
		125	int errorno;
		126	I32 laststype;
		127	int laststatval;
		128	Stat_t statcache;
		129	};
		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
69	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
70	static AV main_mainstack; / used to differentiate between $main and others */	133	static AV main_mainstack; / used to differentiate between $main and others */
		134	static JMPENV *main_top_env;
71	static HV *coro_state_stash;	135	static HV coro_state_stash, coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV coro_mortal; / will be freed after next transfer */	136	static SV coro_mortal; / will be freed after next transfer */
75		137
76	/* 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 */
77	typedef struct {	142	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	143	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		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;
82	coro_context cctx;	153	coro_context cctx;
83		154
84	void *sptr;	155	#if CORO_USE_VALGRIND
85	long ssize; /* positive == mmap, otherwise malloc */	156	int valgrind_id;
86	} coro_stack;	157	#endif
		158	char inuse, mapped;
		159	} coro_cctx;
87		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 */
88	struct coro {	169	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	170	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	171	coro_cctx *cctx;
91
92	/* the optional C context */
93	coro_stack *stack;
94	void *cursp;
95	int gencnt;
96
97	/* optionally saved, might be zero */
98	AV *defav;
99	SV *defsv;
100	SV *errsv;
101
102	/* saved global state not related to stacks */
103	U8 dowarn;
104	I32 in_eval;
105
106	/* the stacks and related info (callchain etc..) */
107	PERL_SI *curstackinfo;
108	AV *curstack;
109	AV *mainstack;
110	SV **stack_sp;
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	CV *compcv;
115	SV **stack_base;
116	SV **stack_max;
117	SV **tmps_stack;
118	I32 tmps_floor;
119	I32 tmps_ix;
120	I32 tmps_max;
121	I32 *markstack;
122	I32 *markstack_ptr;
123	I32 *markstack_max;
124	I32 *scopestack;
125	I32 scopestack_ix;
126	I32 scopestack_max;
127	ANY *savestack;
128	I32 savestack_ix;
129	I32 savestack_max;
130	OP **retstack;
131	I32 retstack_ix;
132	I32 retstack_max;
133	COP *curcop;
134	JMPENV *top_env;
135		172
136	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
137	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 */
138	};	197	};
139		198
140	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
141	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
142		201
143	/* mostly copied from op.c:cv_clone2 */	202	/ Coro ******************************************************************/
144	STATIC AV *	203
145	clone_padlist (pTHX_ AV *protopadlist)	204	#define PRIO_MAX 3
		205	#define PRIO_HIGH 1
		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)
146	{	221	{
147	AV *av;	222	AV *padlist = CvPADLIST (cv);
148	I32 ix;
149	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
150	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
151	SV **pname = AvARRAY (protopad_name);
152	SV **ppad = AvARRAY (protopad);
153	I32 fname = AvFILLp (protopad_name);
154	I32 fpad = AvFILLp (protopad);
155	AV newpadlist, newpad_name, *newpad;	223	AV newpadlist, newpad;
156	SV **npad;
157
158	newpad_name = newAV ();
159	for (ix = fname; ix >= 0; ix--)
160	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
161
162	newpad = newAV ();
163	av_fill (newpad, AvFILLp (protopad));
164	npad = AvARRAY (newpad);
165		224
166	newpadlist = newAV ();	225	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	226	AvREAL_off (newpadlist);
168	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)));
169	av_store (newpadlist, 1, (SV *) newpad);	236	av_store (newpadlist, 1, (SV *)newpad);
170
171	av = newAV (); /* will be @_ */
172	av_extend (av, 0);
173	av_store (newpad, 0, (SV *) av);
174	AvFLAGS (av) = AVf_REIFY;
175
176	for (ix = fpad; ix > 0; ix--)
177	{
178	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
179
180	if (namesv && namesv != &PL_sv_undef)
181	{
182	char name = SvPVX (namesv); / XXX */
183
184	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')
185	{ /* lexical from outside? */
186	npad[ix] = SvREFCNT_inc (ppad[ix]);
187	}
188	else
189	{ /* our own lexical */
190	SV *sv;
191	if (*name == '&')
192	sv = SvREFCNT_inc (ppad[ix]);
193	else if (*name == '@')
194	sv = (SV *) newAV ();
195	else if (*name == '%')
196	sv = (SV *) newHV ();
197	else
198	sv = NEWSV (0, 0);
199
200	#ifdef SvPADBUSY
201	if (!SvPADBUSY (sv))
202	#endif
203	SvPADMY_on (sv);
204
205	npad[ix] = sv;
206	}
207	}
208	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
209	{
210	npad[ix] = SvREFCNT_inc (ppad[ix]);
211	}
212	else
213	{
214	SV *sv = NEWSV (0, 0);
215	SvPADTMP_on (sv);
216	npad[ix] = sv;
217	}
218	}
219
220	#if 0 /* return -ENOTUNDERSTOOD */
221	/* Now that vars are all in place, clone nested closures. */
222
223	for (ix = fpad; ix > 0; ix--) {
224	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
225	if (namesv
226	&& namesv != &PL_sv_undef
227	&& !(SvFLAGS(namesv) & SVf_FAKE)
228	&& *SvPVX(namesv) == '&'
229	&& CvCLONE(ppad[ix]))
230	{
231	CV kid = cv_clone((CV)ppad[ix]);
232	SvREFCNT_dec(ppad[ix]);
233	CvCLONE_on(kid);
234	SvPADMY_on(kid);
235	npad[ix] = (SV*)kid;
236	}
237	}
238	#endif
239		237
240	return newpadlist;	238	return newpadlist;
241	}	239	}
242		240
243	STATIC void	241	static void
244	free_padlist (pTHX_ AV *padlist)	242	free_padlist (pTHX_ AV *padlist)
245	{	243	{
246	/* may be during global destruction */	244	/* may be during global destruction */
247	if (SvREFCNT (padlist))	245	if (SvREFCNT (padlist))
248	{	246	{
…		…
262		260
263	SvREFCNT_dec ((SV*)padlist);	261	SvREFCNT_dec ((SV*)padlist);
264	}	262	}
265	}	263	}
266		264
267	STATIC int	265	static int
268	coro_cv_free (pTHX_ SV sv, MAGIC mg)	266	coro_cv_free (pTHX_ SV sv, MAGIC mg)
269	{	267	{
270	AV *padlist;	268	AV *padlist;
271	AV av = (AV )mg->mg_obj;	269	AV av = (AV )mg->mg_obj;
272		270
273	/* casting is fun. */	271	/* casting is fun. */
274	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	272	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
275	free_padlist (aTHX_ padlist);	273	free_padlist (aTHX_ padlist);
276		274
277	SvREFCNT_dec (av);	275	SvREFCNT_dec (av);
		276
		277	return 0;
278	}	278	}
279		279
280	#define PERL_MAGIC_coro PERL_MAGIC_ext	280	#define PERL_MAGIC_coro PERL_MAGIC_ext
281		281
282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
283		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
284	/* the next two functions merely cache the padlists */	291	/* the next two functions merely cache the padlists */
285	STATIC void	292	static void
286	get_padlist (pTHX_ CV *cv)	293	get_padlist (pTHX_ CV *cv)
287	{	294	{
288	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	295	MAGIC *mg = CORO_MAGIC (cv);
		296	AV *av;
289		297
290	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
291	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
292	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
293	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		310	#endif
		311	}
294	}	312	}
295		313
296	STATIC void	314	static void
297	put_padlist (pTHX_ CV *cv)	315	put_padlist (pTHX_ CV *cv)
298	{	316	{
299	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	317	MAGIC *mg = CORO_MAGIC (cv);
		318	AV *av;
300		319
301	if (!mg)	320	if (!mg)
302	{	321	{
303	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	322	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
304	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	323	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
305	mg->mg_virtual = &vtbl_coro;	324	mg->mg_virtual = &vtbl_coro;
306	mg->mg_obj = (SV *)newAV ();	325	mg->mg_obj = (SV *)newAV ();
307	}	326	}
308		327
309	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);
310	}	334	}
		335
		336	/ load & save, init *****************************************************/
311		337
312	#define SB do {	338	#define SB do {
313	#define SE } while (0)	339	#define SE } while (0)
314		340
315	#define LOAD(state) load_state(aTHX_ (state));
316	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
317
318	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	341	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
319		342
320	static void	343	static void
321	load_state(pTHX_ Coro__State c)	344	load_perl (pTHX_ Coro__State c)
322	{	345	{
323	PL_dowarn = c->dowarn;	346	#define VAR(name,type) PL_ ## name = c->name;
324	PL_in_eval = c->in_eval;	347	# include "state.h"
325		348	#undef VAR
326	PL_curstackinfo = c->curstackinfo;
327	PL_curstack = c->curstack;
328	PL_mainstack = c->mainstack;
329	PL_stack_sp = c->stack_sp;
330	PL_op = c->op;
331	PL_curpad = c->curpad;
332	PL_comppad = c->comppad;
333	PL_compcv = c->compcv;
334	PL_stack_base = c->stack_base;
335	PL_stack_max = c->stack_max;
336	PL_tmps_stack = c->tmps_stack;
337	PL_tmps_floor = c->tmps_floor;
338	PL_tmps_ix = c->tmps_ix;
339	PL_tmps_max = c->tmps_max;
340	PL_markstack = c->markstack;
341	PL_markstack_ptr = c->markstack_ptr;
342	PL_markstack_max = c->markstack_max;
343	PL_scopestack = c->scopestack;
344	PL_scopestack_ix = c->scopestack_ix;
345	PL_scopestack_max = c->scopestack_max;
346	PL_savestack = c->savestack;
347	PL_savestack_ix = c->savestack_ix;
348	PL_savestack_max = c->savestack_max;
349	PL_retstack = c->retstack;
350	PL_retstack_ix = c->retstack_ix;
351	PL_retstack_max = c->retstack_max;
352	PL_curcop = c->curcop;
353	PL_top_env = c->top_env;
354		349
355	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
356	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
357	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	}
358		369
359	{	370	{
360	dSP;	371	dSP;
361	CV *cv;	372	CV *cv;
362		373
363	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
364	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
365	{	376	{
366	AV padlist = (AV )POPs;
367
368	if (padlist)
369	{
370	put_padlist (aTHX_ cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
371	CvPADLIST(cv) = padlist;	378	CvDEPTH (cv) = PTR2IV (POPs);
372	}	379	CvPADLIST (cv) = (AV *)POPs;
373
374	++CvDEPTH(cv);
375	}	380	}
376		381
377	PUTBACK;	382	PUTBACK;
378	}	383	}
379	}	384	}
380		385
381	static void	386	static void
382	save_state(pTHX_ Coro__State c, int flags)	387	save_perl (pTHX_ Coro__State c)
383	{	388	{
384	{	389	{
385	dSP;	390	dSP;
386	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
387	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
…		…
390	/*	395	/*
391	* 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
392	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
393	*/	398	*/
394		399
		400	EXTEND (SP, 3 + 1);
395	PUSHs (Nullsv);	401	PUSHs (Nullsv);
396	/* this loop was inspired by pp_caller */	402	/* this loop was inspired by pp_caller */
397	for (;;)	403	for (;;)
398	{	404	{
399	while (cxix >= 0)	405	while (cxix >= 0)
400	{	406	{
401	PERL_CONTEXT *cx = &ccstk[cxix--];	407	PERL_CONTEXT *cx = &ccstk[cxix--];
402		408
403	if (CxTYPE(cx) == CXt_SUB)	409	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
404	{	410	{
405	CV *cv = cx->blk_sub.cv;	411	CV *cv = cx->blk_sub.cv;
		412
406	if (CvDEPTH(cv))	413	if (CvDEPTH (cv))
407	{	414	{
408	EXTEND (SP, CvDEPTH(cv)*2);	415	EXTEND (SP, 3);
409
410	while (--CvDEPTH(cv))
411	{
412	/* this tells the restore code to increment CvDEPTH */
413	PUSHs (Nullsv);
414	PUSHs ((SV *)cv);
415	}
416
417	PUSHs ((SV *)CvPADLIST(cv));	416	PUSHs ((SV *)CvPADLIST (cv));
		417	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
418	PUSHs ((SV *)cv);	418	PUSHs ((SV *)cv);
419		419
		420	CvDEPTH (cv) = 0;
420	get_padlist (aTHX_ cv); /* this is a monster */	421	get_padlist (aTHX_ cv);
421	}	422	}
422	}	423	}
423	#ifdef CXt_FORMAT
424	else if (CxTYPE(cx) == CXt_FORMAT)
425	{
426	/* I never used formats, so how should I know how these are implemented? */
427	/* my bold guess is as a simple, plain sub... */
428	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
429	}
430	#endif
431	}	424	}
432		425
433	if (top_si->si_type == PERLSI_MAIN)	426	if (top_si->si_type == PERLSI_MAIN)
434	break;	427	break;
435		428
…		…
439	}	432	}
440		433
441	PUTBACK;	434	PUTBACK;
442	}	435	}
443		436
444	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;
445	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	438	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
446	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;
447		442
448	c->dowarn = PL_dowarn;	443	#define VAR(name,type)c->name = PL_ ## name;
449	c->in_eval = PL_in_eval;	444	# include "state.h"
450		445	#undef VAR
451	c->curstackinfo = PL_curstackinfo;
452	c->curstack = PL_curstack;
453	c->mainstack = PL_mainstack;
454	c->stack_sp = PL_stack_sp;
455	c->op = PL_op;
456	c->curpad = PL_curpad;
457	c->comppad = PL_comppad;
458	c->compcv = PL_compcv;
459	c->stack_base = PL_stack_base;
460	c->stack_max = PL_stack_max;
461	c->tmps_stack = PL_tmps_stack;
462	c->tmps_floor = PL_tmps_floor;
463	c->tmps_ix = PL_tmps_ix;
464	c->tmps_max = PL_tmps_max;
465	c->markstack = PL_markstack;
466	c->markstack_ptr = PL_markstack_ptr;
467	c->markstack_max = PL_markstack_max;
468	c->scopestack = PL_scopestack;
469	c->scopestack_ix = PL_scopestack_ix;
470	c->scopestack_max = PL_scopestack_max;
471	c->savestack = PL_savestack;
472	c->savestack_ix = PL_savestack_ix;
473	c->savestack_max = PL_savestack_max;
474	c->retstack = PL_retstack;
475	c->retstack_ix = PL_retstack_ix;
476	c->retstack_max = PL_retstack_max;
477	c->curcop = PL_curcop;
478	c->top_env = PL_top_env;
479	}	446	}
480		447
481	/*	448	/*
482	* allocate various perl stacks. This is an exact copy	449	* allocate various perl stacks. This is an exact copy
483	* of perl.c:init_stacks, except that it uses less memory	450	* of perl.c:init_stacks, except that it uses less memory
484	* on the (sometimes correct) assumption that coroutines do	451	* on the (sometimes correct) assumption that coroutines do
485	* not usually need a lot of stackspace.	452	* not usually need a lot of stackspace.
486	*/	453	*/
487	STATIC void	454	#if CORO_PREFER_PERL_FUNCTIONS
		455	# define coro_init_stacks init_stacks
		456	#else
		457	static void
488	coro_init_stacks (pTHX)	458	coro_init_stacks (pTHX)
489	{	459	{
490	LOCK;
491
492	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	460	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
493	PL_curstackinfo->si_type = PERLSI_MAIN;	461	PL_curstackinfo->si_type = PERLSI_MAIN;
494	PL_curstack = PL_curstackinfo->si_stack;	462	PL_curstack = PL_curstackinfo->si_stack;
495	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	463	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496		464
497	PL_stack_base = AvARRAY(PL_curstack);	465	PL_stack_base = AvARRAY(PL_curstack);
498	PL_stack_sp = PL_stack_base;	466	PL_stack_sp = PL_stack_base;
499	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	467	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
500		468
501	New(50,PL_tmps_stack,96,SV*);	469	New(50,PL_tmps_stack,128,SV*);
502	PL_tmps_floor = -1;	470	PL_tmps_floor = -1;
503	PL_tmps_ix = -1;	471	PL_tmps_ix = -1;
504	PL_tmps_max = 96;	472	PL_tmps_max = 128;
505		473
506	New(54,PL_markstack,16,I32);	474	New(54,PL_markstack,32,I32);
507	PL_markstack_ptr = PL_markstack;	475	PL_markstack_ptr = PL_markstack;
508	PL_markstack_max = PL_markstack + 16;	476	PL_markstack_max = PL_markstack + 32;
509		477
510	#ifdef SET_MARK_OFFSET	478	#ifdef SET_MARK_OFFSET
511	SET_MARK_OFFSET;	479	SET_MARK_OFFSET;
512	#endif	480	#endif
513		481
514	New(54,PL_scopestack,16,I32);	482	New(54,PL_scopestack,32,I32);
515	PL_scopestack_ix = 0;	483	PL_scopestack_ix = 0;
516	PL_scopestack_max = 16;	484	PL_scopestack_max = 32;
517		485
518	New(54,PL_savestack,96,ANY);	486	New(54,PL_savestack,64,ANY);
519	PL_savestack_ix = 0;	487	PL_savestack_ix = 0;
520	PL_savestack_max = 96;	488	PL_savestack_max = 64;
521		489
		490	#if !PERL_VERSION_ATLEAST (5,9,0)
522	New(54,PL_retstack,8,OP*);	491	New(54,PL_retstack,16,OP*);
523	PL_retstack_ix = 0;	492	PL_retstack_ix = 0;
524	PL_retstack_max = 8;	493	PL_retstack_max = 16;
525		494	#endif
526	UNLOCK;
527	}	495	}
		496	#endif
528		497
529	/*	498	/*
530	* destroy the stacks, the callchain etc...	499	* destroy the stacks, the callchain etc...
531	*/	500	*/
532	STATIC void	501	static void
533	destroy_stacks(pTHX)	502	coro_destroy_stacks (pTHX)
534	{	503	{
535	if (!IN_DESTRUCT)	504	if (!IN_DESTRUCT)
536	{	505	{
537	/* is this ugly, I ask? */	506	/* restore all saved variables and stuff */
538	LEAVE_SCOPE (0);	507	LEAVE_SCOPE (0);
		508	assert (PL_tmps_floor == -1);
539		509
540	/* sure it is, but more important: is it correct?? :/ */	510	/* free all temporaries */
541	FREETMPS;	511	FREETMPS;
		512	assert (PL_tmps_ix == -1);
542		513
		514	/* unwind all extra stacks */
543	/POPSTACK_TO (PL_mainstack);//D//use/	515	POPSTACK_TO (PL_mainstack);
		516
		517	/* unwind main stack */
		518	dounwind (-1);
544	}	519	}
545		520
546	while (PL_curstackinfo->si_next)	521	while (PL_curstackinfo->si_next)
547	PL_curstackinfo = PL_curstackinfo->si_next;	522	PL_curstackinfo = PL_curstackinfo->si_next;
548		523
549	while (PL_curstackinfo)	524	while (PL_curstackinfo)
550	{	525	{
551	PERL_SI *p = PL_curstackinfo->si_prev;	526	PERL_SI *p = PL_curstackinfo->si_prev;
552		527
553	{ /D//remove/
554	dSP;
555	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
556	PUTBACK; /* possibly superfluous */
557	}
558
559	if (!IN_DESTRUCT)	528	if (!IN_DESTRUCT)
560	{
561	dounwind (-1);/D//remove/
562	SvREFCNT_dec (PL_curstackinfo->si_stack);	529	SvREFCNT_dec (PL_curstackinfo->si_stack);
563	}
564		530
565	Safefree (PL_curstackinfo->si_cxstack);	531	Safefree (PL_curstackinfo->si_cxstack);
566	Safefree (PL_curstackinfo);	532	Safefree (PL_curstackinfo);
567	PL_curstackinfo = p;	533	PL_curstackinfo = p;
568	}	534	}
569		535
570	Safefree (PL_tmps_stack);	536	Safefree (PL_tmps_stack);
571	Safefree (PL_markstack);	537	Safefree (PL_markstack);
572	Safefree (PL_scopestack);	538	Safefree (PL_scopestack);
573	Safefree (PL_savestack);	539	Safefree (PL_savestack);
		540	#if !PERL_VERSION_ATLEAST (5,9,0)
574	Safefree (PL_retstack);	541	Safefree (PL_retstack);
575	}
576
577	static void
578	allocate_stack (Coro__State ctx, int alloc)
579	{
580	coro_stack *stack;
581
582	New (0, stack, 1, coro_stack);
583
584	stack->refcnt = 1;
585	stack->usecnt = 1;
586	stack->gencnt = ctx->gencnt = 0;
587
588	if (alloc)
589	{
590	#if HAVE_MMAP
591	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
592	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
593	if (stack->sptr == (void *)-1)
594	#endif	542	#endif
595	{
596	/FIXME//D//* reasonable stack size! */
597	stack->ssize = - (8192 * sizeof (long));
598	New (0, stack->sptr, 8192, long);
599	}
600	}
601	else
602	stack->sptr = 0;
603
604	ctx->stack = stack;
605	}	543	}
606		544
607	static void	545	/ coroutine stack handling **********************************************/
608	deallocate_stack (Coro__State ctx)
609	{
610	coro_stack *stack = ctx->stack;
611		546
612	ctx->stack = 0;
613
614	if (stack)
615	{
616	if (!--stack->refcnt)
617	{
618	#ifdef HAVE_MMAP
619	if (stack->ssize > 0 && stack->sptr)
620	munmap (stack->sptr, stack->ssize);
621	else
622	#endif
623	Safefree (stack->sptr);
624
625	Safefree (stack);
626	}
627	else if (ctx->gencnt == stack->gencnt)
628	--stack->usecnt;
629	}
630	}
631
632	static void	547	static void
633	setup_coro (void *arg)	548	setup_coro (pTHX_ struct coro *coro)
634	{	549	{
635	/*	550	/*
636	* emulate part of the perl startup here.	551	* emulate part of the perl startup here.
637	*/	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	{
		601	dSP;
		602	LOGOP myop;
		603
		604	Zero (&myop, 1, LOGOP);
		605	myop.op_next = PL_op;
		606	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		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);
		615	SPAGAIN;
		616	}
		617
		618	/*
		619	* this is a _very_ stripped down perl interpreter ;)
		620	*/
		621	static void
		622	coro_run (void *arg)
		623	{
638	dTHX;	624	dTHX;
639	dSP;
640	Coro__State ctx = (Coro__State)arg;
641	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
642		625
643	coro_init_stacks (aTHX);	626	/* coro_run is the alternative tail of transfer(), so unlock here. */
644	/PL_curcop = 0;/	627	UNLOCK;
645	/PL_in_eval = PL_in_eval;/ /* inherit */
646	SvREFCNT_dec (GvAV (PL_defgv));
647	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
648		628
649	SPAGAIN;	629	PL_top_env = &PL_start_env;
650		630
651	if (ctx->stack)	631	/* inject a fake subroutine call to cctx_init */
652	{	632	prepare_cctx (aTHX_ (coro_cctx *)arg);
653	ctx->cursp = 0;
654		633
655	PUSHMARK(SP);	634	/* somebody or something will hit me for both perl_run and PL_restartop */
656	PUTBACK;	635	PL_restartop = PL_op;
657	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);	636	perl_run (PL_curinterp);
658		637
659	if (SvTRUE (ERRSV))	638	/*
660	croak (NULL);	639	* If perl-run returns we assume exit() was being called or the coro
661	else	640	* fell off the end, which seems to be the only valid (non-bug)
662	croak ("FATAL: CCTXT coroutine returned!");	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;
663	}	674	}
664	else	675	else
665	{	676	#endif
666	UNOP myop;
667
668	PL_op = (OP *)&myop;
669
670	Zero(&myop, 1, UNOP);
671	myop.op_next = Nullop;
672	myop.op_flags = OPf_WANT_VOID;
673
674	PUSHMARK(SP);
675	XPUSHs (sub_init);
676	/*
677	* the next line is slightly wrong, as PL_op->op_next
678	* is actually being executed so we skip the first op.
679	* that doesn't matter, though, since it is only
680	* pp_nextstate and we never return...
681	* ah yes, and I don't care anyways ;)
682	*/
683	PUTBACK;
684	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685	SPAGAIN;
686
687	ENTER; /* necessary e.g. for dounwind */
688	}	677	{
689	}	678	cctx->ssize = coro_stacksize * (long)sizeof (long);
		679	New (0, cctx->sptr, coro_stacksize, long);
690		680
691	static void	681	if (!cctx->sptr)
692	continue_coro (void *arg)	682	{
693	{	683	perror ("FATAL: unable to allocate stack for coroutine");
694	/*	684	_exit (EXIT_FAILURE);
695	* this is a _very_ stripped down perl interpreter ;)	685	}
696	*/
697	dTHX;
698	Coro__State ctx = (Coro__State)arg;
699	JMPENV coro_start_env;
700		686
701	PL_top_env = &ctx->start_env;	687	stack_start = cctx->sptr;
		688	stack_size = cctx->ssize;
		689	}
702		690
703	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
704	PL_op = PL_op->op_next;	734	PL_op = PL_op->op_next;
705	CALLRUNOPS(aTHX);	735	return cctx_new ();
706
707	abort ();
708	}	736	}
709		737
710	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
711	transfer (pTHX_ struct coro prev, struct coro next, int flags)	761	transfer (pTHX_ struct coro prev, struct coro next)
712	{	762	{
713	dSTACKLEVEL;	763	dSTACKLEVEL;
714		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	}
715	if (prev != next)	771	else if (prev != next)
716	{	772	{
717	if (next->mainstack)	773	coro_cctx *prev__cctx;
		774
		775	if (prev->flags & CF_NEW)
718	{	776	{
719	LOCK;	777	/* create a new empty context */
720	SAVE (prev, flags);	778	Newz (0, prev->cctx, 1, coro_cctx);
721	LOAD (next);	779	prev->cctx->inuse = 1;
722	UNLOCK;	780	prev->flags &= ~CF_NEW;
723		781	prev->flags \|= CF_RUNNING;
724	/* mark this state as in-use */
725	next->mainstack = 0;
726	next->tmps_ix = -2;
727
728	/* stacklevel changed? if yes, grab the stack for us! */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733	else if (prev->cursp != stacklevel
734	&& prev->stack->usecnt > 1)
735	{
736	prev->gencnt = ++prev->stack->gencnt;
737	prev->stack->usecnt = 1;
738	}
739
740	/* has our stack been invalidated? */
741	if (next->stack && next->stack->gencnt != next->gencnt)
742	{
743	deallocate_stack (next);
744	allocate_stack (next, 1);
745	coro_create (&(next->stack->cctx),
746	continue_coro, (void *)next,
747	next->stack->sptr, labs (next->stack->ssize));
748	}
749
750	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751	prev->cursp = stacklevel;
752	/* don't add any code here */
753	}
754	else
755	next->cursp = stacklevel;
756	}	782	}
757	else if (next->tmps_ix == -2)	783
758	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	}
759	else	810	else
760	{	811	{
761	LOCK;	812	/* coroutine already started */
762	SAVE (prev, -1); /* first get rid of the old state */	813	save_perl (aTHX_ prev);
763	UNLOCK;	814	load_perl (aTHX_ next);
764
765	if (flags & TRANSFER_SAVE_CCTXT)
766	{
767	if (!prev->stack)
768	allocate_stack (prev, 0);
769
770	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
771	{
772	PL_top_env = &next->start_env;
773
774	setup_coro (next);
775	next->cursp = stacklevel;
776
777	prev->stack->refcnt++;
778	prev->stack->usecnt++;
779	next->stack = prev->stack;
780	next->gencnt = prev->gencnt;
781	}
782	else
783	{
784	assert (!next->stack);
785	allocate_stack (next, 1);
786	coro_create (&(next->stack->cctx),
787	setup_coro, (void *)next,
788	next->stack->sptr, labs (next->stack->ssize));
789	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
790	prev->cursp = stacklevel;
791	/* don't add any code here */
792	}
793	}
794	else
795	{
796	setup_coro (next);
797	next->cursp = stacklevel;
798	}
799	}	815	}
800	}
801		816
802	LOCK;	817	prev__cctx = prev->cctx;
803	if (coro_mortal)	818
804	{	819	/* possibly "free" the cctx */
805	SvREFCNT_dec (coro_mortal);	820	if (prev__cctx->idle_sp == STACKLEVEL)
806	coro_mortal = 0;	821	{
807	}	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);
808	UNLOCK;	846	UNLOCK;
		847	}
809	}	848	}
810		849
811	#define SV_CORO(sv,func) \	850	struct transfer_args
812	do { \	851	{
813	if (SvROK (sv)) \	852	struct coro prev, next;
814	sv = SvRV (sv); \	853	};
815	\
816	if (SvTYPE (sv) == SVt_PVHV) \
817	{ \
818	HE he = hv_fetch_ent ((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
819	\
820	if (!he) \
821	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
822	\
823	(sv) = SvRV (HeVAL(he)); \
824	} \
825	\
826	/* must also be changed inside Coro::Cont::yield */ \
827	if (!SvOBJECT (sv) \|\| SvSTASH (sv) != coro_state_stash) \
828	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
829	\
830	} while(0)
831		854
832	#define SvSTATE(sv) (struct coro *)SvIV (sv)	855	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
833		856
		857	/ high level stuff ******************************************************/
		858
834	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
835	api_transfer(pTHX_ SV prev, SV next, int flags)	979	api_transfer (SV prev_sv, SV next_sv)
836	{	980	{
837	SV_CORO (prev, "Coro::transfer");	981	dTHX;
838	SV_CORO (next, "Coro::transfer");	982	struct transfer_args ta;
839		983
840	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;
841	}	999	}
842		1000
843	/ Coro ******************************************************************/	1001	/ Coro ******************************************************************/
844		1002
845	#define PRIO_MAX 3
846	#define PRIO_HIGH 1
847	#define PRIO_NORMAL 0
848	#define PRIO_LOW -1
849	#define PRIO_IDLE -3
850	#define PRIO_MIN -4
851
852	/* for Coro.pm */
853	static GV coro_current, coro_idle;
854	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
855	static int coro_nready;
856
857	static void	1003	static void
858	coro_enq (pTHX_ SV *sv)	1004	coro_enq (pTHX_ SV *coro_sv)
859	{	1005	{
860	if (SvTYPE (sv) == SVt_PVHV)
861	{
862	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
863	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
864
865	prio = prio > PRIO_MAX ? PRIO_MAX
866	: prio < PRIO_MIN ? PRIO_MIN
867	: prio;
868
869	av_push (coro_ready [prio - PRIO_MIN], sv);	1006	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
870	coro_nready++;
871
872	return;
873	}
874
875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
876	}	1007	}
877		1008
878	static SV *	1009	static SV *
879	coro_deq (pTHX_ int min_prio)	1010	coro_deq (pTHX_ int min_prio)
880	{	1011	{
…		…
883	min_prio -= PRIO_MIN;	1014	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	1015	if (min_prio < 0)
885	min_prio = 0;	1016	min_prio = 0;
886		1017
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1018	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (av_len (coro_ready[prio]) >= 0)	1019	if (AvFILLp (coro_ready [prio]) >= 0)
889	{
890	coro_nready--;
891	return av_shift (coro_ready[prio]);	1020	return av_shift (coro_ready [prio]);
892	}
893		1021
894	return 0;	1022	return 0;
895	}	1023	}
896		1024
897	static void	1025	static int
898	api_ready (SV *coro)	1026	api_ready (SV *coro_sv)
899	{	1027	{
900	dTHX;	1028	dTHX;
		1029	struct coro *coro;
901		1030
902	if (SvROK (coro))	1031	if (SvROK (coro_sv))
903	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;
904		1040
905	LOCK;	1041	LOCK;
906	coro_enq (aTHX_ SvREFCNT_inc (coro));	1042	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1043	++coro_nready;
907	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;
908	}	1133	}
909		1134
910	static void	1135	static void
911	api_schedule (void)	1136	api_schedule (void)
912	{	1137	{
913	dTHX;	1138	dTHX;
		1139	struct transfer_args ta;
914		1140
915	SV prev, next;	1141	prepare_schedule (aTHX_ &ta);
916		1142	TRANSFER (ta);
917	LOCK;
918
919	prev = SvRV (GvSV (coro_current));
920	next = coro_deq (aTHX_ PRIO_MIN);
921
922	if (!next)
923	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
924
925	/* free this only after the transfer */
926	coro_mortal = prev;
927	SV_CORO (prev, "Coro::schedule");
928
929	SvRV (GvSV (coro_current)) = next;
930
931	SV_CORO (next, "Coro::schedule");
932
933	UNLOCK;
934
935	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
936	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
937	}	1143	}
938		1144
939	static void	1145	static int
940	api_cede (void)	1146	api_cede (void)
941	{	1147	{
942	dTHX;	1148	dTHX;
		1149	struct transfer_args ta;
943		1150
944	LOCK;	1151	prepare_cede (aTHX_ &ta);
945	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
946	UNLOCK;
947		1152
948	api_schedule ();	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;
949	}	1175	}
950		1176
951	MODULE = Coro::State PACKAGE = Coro::State	1177	MODULE = Coro::State PACKAGE = Coro::State
952		1178
953	PROTOTYPES: ENABLE	1179	PROTOTYPES: DISABLE
954		1180
955	BOOT:	1181	BOOT:
956	{ /* {} necessary for stoopid perl-5.6.x */	1182	{
957	#ifdef USE_ITHREADS	1183	#ifdef USE_ITHREADS
958	MUTEX_INIT (&coro_mutex);	1184	MUTEX_INIT (&coro_mutex);
959	#endif	1185	#endif
		1186	BOOT_PAGESIZE;
960		1187
961	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
962	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
963	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1188	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964		1189
965	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1190	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
966	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1191	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
967	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));
968	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));
969		1197
970	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;
971		1203
972	coroapi.ver = CORO_API_VERSION;	1204	coroapi.ver = CORO_API_VERSION;
973	coroapi.transfer = api_transfer;	1205	coroapi.transfer = api_transfer;
974	}
975		1206
976	Coro::State	1207	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
977	_newprocess(args)	1208	}
978	SV * args	1209
979	PROTOTYPE: $	1210	SV *
		1211	new (char *klass, ...)
980	CODE:	1212	CODE:
981	Coro__State coro;	1213	{
		1214	struct coro *coro;
		1215	HV *hv;
		1216	int i;
982		1217
983	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
984	croak ("Coro::State::_newprocess expects an arrayref");
985
986	Newz (0, coro, 1, struct coro);	1218	Newz (0, coro, 1, struct coro);
		1219	coro->args = newAV ();
		1220	coro->save = CORO_SAVE_DEF;
		1221	coro->flags = CF_NEW;
987		1222
988	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1223	if (first) first->prev = coro;
989	/coro->mainstack = 0; //actual work is done inside transfer /	1224	coro->next = first;
990	/coro->stack = 0;/	1225	first = coro;
991		1226
992	/* same as JMPENV_BOOTSTRAP */	1227	coro->hv = hv = newHV ();
993	/* 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;
994	/Zero(&coro->start_env, 1, JMPENV);/	1229	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
995	coro->start_env.je_ret = -1;
996	coro->start_env.je_mustcatch = TRUE;
997		1230
998	RETVAL = coro;	1231	for (i = 1; i < items; i++)
		1232	av_push (coro->args, newSVsv (ST (i)));
		1233	}
999	OUTPUT:	1234	OUTPUT:
1000	RETVAL	1235	RETVAL
1001		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
1002	void	1255	void
1003	transfer(prev, next, flags)	1256	_set_stacklevel (...)
1004	SV *prev	1257	ALIAS:
1005	SV *next	1258	Coro::State::transfer = 1
1006	int flags	1259	Coro::schedule = 2
1007	PROTOTYPE: @	1260	Coro::cede = 3
		1261	Coro::cede_notself = 4
1008	CODE:	1262	CODE:
1009	PUTBACK;	1263	{
1010	SV_CORO (next, "Coro::transfer");	1264	struct transfer_args ta;
1011	SV_CORO (prev, "Coro::transfer");	1265
1012	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1266	switch (ix)
1013	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
1014		1308
1015	void	1309	void
1016	DESTROY(coro)
1017	Coro::State coro
1018	CODE:
1019
1020	if (coro->mainstack && coro->mainstack != main_mainstack)
1021	{
1022	struct coro temp;
1023
1024	PUTBACK;
1025	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1026	LOAD (aTHX_ coro);
1027	SPAGAIN;
1028
1029	destroy_stacks (aTHX);
1030
1031	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1032	SPAGAIN;
1033
1034	coro->mainstack = 0;
1035	}
1036
1037	deallocate_stack (coro);
1038	SvREFCNT_dec (coro->args);
1039	Safefree (coro);
1040
1041	void
1042	_exit(code)	1310	_exit (code)
1043	int code	1311	int code
1044	PROTOTYPE: $	1312	PROTOTYPE: $
1045	CODE:	1313	CODE:
1046	_exit (code);	1314	_exit (code);
1047		1315
1048	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
1049		1324
1050	# 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
1051		1338
1052	void	1339	void
1053	yield(...)	1340	list ()
1054	PROTOTYPE: @	1341	PPCODE:
1055	CODE:	1342	{
1056	static SV *returnstk;	1343	struct coro *coro;
1057	SV *sv;	1344	for (coro = first; coro; coro = coro->next)
1058	AV *defav = GvAV (PL_defgv);	1345	if (coro->hv)
1059	struct coro prev, next;	1346	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1347	}
1060		1348
1061	if (!returnstk)	1349	void
1062	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;
1063		1359
1064	/* set up @_ -- ugly */	1360	if (!(coro->flags & CF_RUNNING))
1065	av_clear (defav);	1361	{
1066	av_fill (defav, items - 1);	1362	save_perl (aTHX_ &temp);
1067	while (items--)	1363	load_perl (aTHX_ coro);
1068	av_store (defav, items, SvREFCNT_inc (ST(items)));	1364	}
1069		1365
1070	SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */	1366	{
1071	sv = av_pop ((AV *)SvRV (returnstk));	1367	dSP;
1072	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));	1368	ENTER;
1073	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));	1369	SAVETMPS;
1074	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	}
1075		1378
1076	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
1077		1401
1078	MODULE = Coro::State PACKAGE = Coro	1402	MODULE = Coro::State PACKAGE = Coro
1079		1403
1080	# this is slightly dirty (should expose a c-level api)
1081
1082	BOOT:	1404	BOOT:
1083	{	1405	{
1084	int i;	1406	int i;
		1407
1085	HV *stash = gv_stashpv ("Coro", TRUE);	1408	coro_stash = gv_stashpv ("Coro", TRUE);
1086		1409
1087	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1410	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1088	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1411	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1089	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1412	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1090	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1413	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1091	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1414	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1092	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1415	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1093		1416
1094	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1417	coro_current = get_sv ("Coro::current", FALSE);
1095	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1418	SvREADONLY_on (coro_current);
1096		1419
1097	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1420	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1098	coro_ready[i] = newAV ();	1421	coro_ready[i] = newAV ();
1099		1422
1100	{	1423	{
1101	SV *sv = perl_get_sv("Coro::API", 1);	1424	SV *sv = perl_get_sv("Coro::API", 1);
1102		1425
1103	coroapi.schedule = api_schedule;	1426	coroapi.schedule = api_schedule;
		1427	coroapi.save = api_save;
1104	coroapi.cede = api_cede;	1428	coroapi.cede = api_cede;
		1429	coroapi.cede_notself = api_cede_notself;
1105	coroapi.ready = api_ready;	1430	coroapi.ready = api_ready;
		1431	coroapi.is_ready = api_is_ready;
1106	coroapi.nready = &coro_nready;	1432	coroapi.nready = &coro_nready;
1107	coroapi.current = coro_current;	1433	coroapi.current = coro_current;
1108		1434
1109	GCoroAPI = &coroapi;	1435	GCoroAPI = &coroapi;
1110	sv_setiv(sv, (IV)&coroapi);	1436	sv_setiv (sv, (IV)&coroapi);
1111	SvREADONLY_on(sv);	1437	SvREADONLY_on (sv);
1112	}	1438	}
1113	}	1439	}
1114		1440
1115	#if !PERL_MICRO
1116
1117	void	1441	void
1118	ready(self)	1442	_set_current (SV *current)
1119	SV * self
1120	PROTOTYPE: $	1443	PROTOTYPE: $
1121	CODE:	1444	CODE:
1122	api_ready (self);	1445	SvREFCNT_dec (SvRV (coro_current));
1123		1446	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1124	#endif
1125		1447
1126	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
1127	nready(...)	1479	nready (...)
1128	PROTOTYPE:	1480	PROTOTYPE:
1129	CODE:	1481	CODE:
1130	RETVAL = coro_nready;	1482	RETVAL = coro_nready;
1131	OUTPUT:	1483	OUTPUT:
1132	RETVAL	1484	RETVAL
1133		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
1134	void	1507	void
1135	schedule(...)	1508	_set_state (char *data_)
1136	PROTOTYPE:	1509	PROTOTYPE: $
1137	CODE:	1510	CODE:
1138	api_schedule ();	1511	{
		1512	struct io_state data = (void )data_;
1139		1513
1140	void	1514	errno = data->errorno;
1141	cede(...)	1515	PL_laststype = data->laststype;
1142	PROTOTYPE:	1516	PL_laststatval = data->laststatval;
1143	CODE:	1517	PL_statcache = data->statcache;
1144	api_cede ();	1518	}
1145		1519

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Comparing Coro/Coro/State.xs (file contents): Revision 1.63 by root, Mon Mar 21 14:35:22 2005 UTC vs. Revision 1.151 by root, Wed Sep 19 21:39:15 2007 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.63 by root, Mon Mar 21 14:35:22 2005 UTC vs.
Revision 1.151 by root, Wed Sep 19 21:39:15 2007 UTC