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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.79 by root, Thu Nov 2 12:29:08 2006 UTC vs.
Revision 1.157 by root, Fri Sep 21 02:01:13 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 PERL_VERSION < 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 <errno.h>	75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
33		79
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	81	# undef CORO_STACKGUARD
36	#endif
37
38	#ifndef STACKGUARD
39	# define STACKGUARD 0
40	#endif
41
42	#ifdef HAVE_MMAP
43	# include <unistd.h>
44	# include <sys/mman.h>
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	82	#endif
52	# include <limits.h>	83
53	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	86	#endif
60	#endif
61		87
62	#define SUB_INIT "Coro::State::initialize"	88	/* prefer perl internal functions over our own? */
63	#define UCORO_STATE "_coro_state"	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
64		92
65	/* 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
66	* 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
67	* and should be unique. */	95	* and should be unique. */
		96	#define dSTACKLEVEL int stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	97	#define STACKLEVEL ((void *)&stacklevel)
69		98
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		100
72	#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))
73		110
74	#include "CoroAPI.h"	111	#include "CoroAPI.h"
75		112
76	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
…		…
80	#else	117	#else
81	# define LOCK (void)0	118	# define LOCK (void)0
82	# define UNLOCK (void)0	119	# define UNLOCK (void)0
83	#endif	120	#endif
84		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;
85	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
86	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;
87	static HV *coro_state_stash;	135	static HV coro_state_stash, coro_stash;
88	static SV *ucoro_state_sv;
89	static U32 ucoro_state_hash;
90	static SV coro_mortal; / will be freed after next transfer */	136	static SV coro_mortal; / will be freed after next transfer */
91		137
92	/* 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 */
93	typedef struct {	142	typedef struct coro_cctx {
94	int refcnt; /* pointer reference counter */	143	struct coro_cctx *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		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;
98	coro_context cctx;	153	coro_context cctx;
99		154
100	void *sptr;	155	#if CORO_USE_VALGRIND
101	long ssize; /* positive == mmap, otherwise malloc */	156	int valgrind_id;
102	} coro_stack;	157	#endif
		158	char inuse, mapped;
		159	} coro_cctx;
103		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 */
104	struct coro {	169	struct coro {
105	/* the top-level JMPENV for each coroutine, needed to catch dies. */	170	/* the c coroutine allocated to this perl coroutine, if any */
106	JMPENV start_env;	171	coro_cctx *cctx;
107
108	/* the optional C context */
109	coro_stack *stack;
110	void *cursp;
111	int gencnt;
112
113	/* optionally saved, might be zero */
114	AV *defav;
115	SV *defsv;
116	SV *errsv;
117
118	/* saved global state not related to stacks */
119	U8 dowarn;
120	I32 in_eval;
121
122	/* the stacks and related info (callchain etc..) */
123	PERL_SI *curstackinfo;
124	AV *curstack;
125	AV *mainstack;
126	SV **stack_sp;
127	OP *op;
128	SV **curpad;
129	AV *comppad;
130	CV *compcv;
131	SV **stack_base;
132	SV **stack_max;
133	SV **tmps_stack;
134	I32 tmps_floor;
135	I32 tmps_ix;
136	I32 tmps_max;
137	I32 *markstack;
138	I32 *markstack_ptr;
139	I32 *markstack_max;
140	I32 *scopestack;
141	I32 scopestack_ix;
142	I32 scopestack_max;
143	ANY *savestack;
144	I32 savestack_ix;
145	I32 savestack_max;
146	OP **retstack;
147	I32 retstack_ix;
148	I32 retstack_max;
149	PMOP *curpm;
150	COP *curcop;
151	JMPENV *top_env;
152		172
153	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
154	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 */
155	};	197	};
156		198
157	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
158	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
159		201
		202	/ Coro ******************************************************************/
		203
		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 *coro_first;
		216
		217	/ lowlevel stuff ********************************************************/
		218
160	static AV *	219	static AV *
161	coro_clone_padlist (pTHX_ CV *cv)	220	coro_clone_padlist (pTHX_ CV *cv)
162	{	221	{
163	AV *padlist = CvPADLIST (cv);	222	AV *padlist = CvPADLIST (cv);
164	AV newpadlist, newpad;	223	AV newpadlist, newpad;
165		224
166	newpadlist = newAV ();	225	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	226	AvREAL_off (newpadlist);
168	#if PERL_VERSION < 9	227	#if PERL_VERSION_ATLEAST (5,9,0)
		228	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		229	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	230	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
170	#else
171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172	#endif	231	#endif
173	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	232	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
174	--AvFILLp (padlist);	233	--AvFILLp (padlist);
175		234
176	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	235	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
220		279
221	#define PERL_MAGIC_coro PERL_MAGIC_ext	280	#define PERL_MAGIC_coro PERL_MAGIC_ext
222		281
223	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
224		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
225	/* the next two functions merely cache the padlists */	291	/* the next two functions merely cache the padlists */
226	static void	292	static void
227	get_padlist (pTHX_ CV *cv)	293	get_padlist (pTHX_ CV *cv)
228	{	294	{
229	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	295	MAGIC *mg = CORO_MAGIC (cv);
		296	AV *av;
230		297
231	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
232	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
233	else	300	else
234	{	301	{
235	#if 0	302	#if CORO_PREFER_PERL_FUNCTIONS
236	/* this should work - but it doesn't :( */	303	/* this is probably cleaner, but also slower? */
237	CV *cp = Perl_cv_clone (aTHX_ cv);	304	CV *cp = Perl_cv_clone (cv);
238	CvPADLIST (cv) = CvPADLIST (cp);	305	CvPADLIST (cv) = CvPADLIST (cp);
239	CvPADLIST (cp) = 0;	306	CvPADLIST (cp) = 0;
240	SvREFCNT_dec (cp);	307	SvREFCNT_dec (cp);
241	#else	308	#else
242	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
245	}	312	}
246		313
247	static void	314	static void
248	put_padlist (pTHX_ CV *cv)	315	put_padlist (pTHX_ CV *cv)
249	{	316	{
250	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	317	MAGIC *mg = CORO_MAGIC (cv);
		318	AV *av;
251		319
252	if (!mg)	320	if (!mg)
253	{	321	{
254	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	322	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
255	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	323	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
256	mg->mg_virtual = &vtbl_coro;	324	mg->mg_virtual = &vtbl_coro;
257	mg->mg_obj = (SV *)newAV ();	325	mg->mg_obj = (SV *)newAV ();
258	}	326	}
259		327
260	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);
261	}	334	}
		335
		336	/ load & save, init *****************************************************/
262		337
263	#define SB do {	338	#define SB do {
264	#define SE } while (0)	339	#define SE } while (0)
265		340
266	#define LOAD(state) load_state(aTHX_ (state));
267	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
268
269	#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
270		342
271	static void	343	static void
272	load_state(pTHX_ Coro__State c)	344	load_perl (pTHX_ Coro__State c)
273	{	345	{
274	PL_dowarn = c->dowarn;	346	#define VAR(name,type) PL_ ## name = c->name;
275	PL_in_eval = c->in_eval;	347	# include "state.h"
276		348	#undef VAR
277	PL_curstackinfo = c->curstackinfo;
278	PL_curstack = c->curstack;
279	PL_mainstack = c->mainstack;
280	PL_stack_sp = c->stack_sp;
281	PL_op = c->op;
282	PL_curpad = c->curpad;
283	PL_comppad = c->comppad;
284	PL_compcv = c->compcv;
285	PL_stack_base = c->stack_base;
286	PL_stack_max = c->stack_max;
287	PL_tmps_stack = c->tmps_stack;
288	PL_tmps_floor = c->tmps_floor;
289	PL_tmps_ix = c->tmps_ix;
290	PL_tmps_max = c->tmps_max;
291	PL_markstack = c->markstack;
292	PL_markstack_ptr = c->markstack_ptr;
293	PL_markstack_max = c->markstack_max;
294	PL_scopestack = c->scopestack;
295	PL_scopestack_ix = c->scopestack_ix;
296	PL_scopestack_max = c->scopestack_max;
297	PL_savestack = c->savestack;
298	PL_savestack_ix = c->savestack_ix;
299	PL_savestack_max = c->savestack_max;
300	#if PERL_VERSION < 9
301	PL_retstack = c->retstack;
302	PL_retstack_ix = c->retstack_ix;
303	PL_retstack_max = c->retstack_max;
304	#endif
305	PL_curpm = c->curpm;
306	PL_curcop = c->curcop;
307	PL_top_env = c->top_env;
308		349
309	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
310	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
311	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	}
312		369
313	{	370	{
314	dSP;	371	dSP;
315	CV *cv;	372	CV *cv;
316		373
317	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
318	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
319	{	376	{
320	AV padlist = (AV )POPs;
321
322	if (padlist)
323	{
324	put_padlist (aTHX_ cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
325	CvPADLIST(cv) = padlist;	378	CvDEPTH (cv) = PTR2IV (POPs);
326	}	379	CvPADLIST (cv) = (AV *)POPs;
327
328	++CvDEPTH(cv);
329	}	380	}
330		381
331	PUTBACK;	382	PUTBACK;
332	}	383	}
333	}	384	}
334		385
335	static void	386	static void
336	save_state(pTHX_ Coro__State c, int flags)	387	save_perl (pTHX_ Coro__State c)
337	{	388	{
338	{	389	{
339	dSP;	390	dSP;
340	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
341	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
…		…
344	/*	395	/*
345	* 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
346	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
347	*/	398	*/
348		399
349	PUSHs (Nullsv);	400	XPUSHs (Nullsv);
350	/* this loop was inspired by pp_caller */	401	/* this loop was inspired by pp_caller */
351	for (;;)	402	for (;;)
352	{	403	{
353	while (cxix >= 0)	404	while (cxix >= 0)
354	{	405	{
355	PERL_CONTEXT *cx = &ccstk[cxix--];	406	PERL_CONTEXT *cx = &ccstk[cxix--];
356		407
357	if (CxTYPE(cx) == CXt_SUB)	408	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
358	{	409	{
359	CV *cv = cx->blk_sub.cv;	410	CV *cv = cx->blk_sub.cv;
		411
360	if (CvDEPTH(cv))	412	if (CvDEPTH (cv))
361	{	413	{
362	EXTEND (SP, CvDEPTH(cv)*2);	414	EXTEND (SP, 3);
363
364	while (--CvDEPTH(cv))
365	{
366	/* this tells the restore code to increment CvDEPTH */
367	PUSHs (Nullsv);
368	PUSHs ((SV *)cv);
369	}
370
371	PUSHs ((SV *)CvPADLIST(cv));	415	PUSHs ((SV *)CvPADLIST (cv));
		416	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
372	PUSHs ((SV *)cv);	417	PUSHs ((SV *)cv);
373		418
		419	CvDEPTH (cv) = 0;
374	get_padlist (aTHX_ cv);	420	get_padlist (aTHX_ cv);
375	}	421	}
376	}	422	}
377	#ifdef CXt_FORMAT
378	else if (CxTYPE(cx) == CXt_FORMAT)
379	{
380	/* I never used formats, so how should I know how these are implemented? */
381	/* my bold guess is as a simple, plain sub... */
382	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383	}
384	#endif
385	}	423	}
386		424
387	if (top_si->si_type == PERLSI_MAIN)	425	if (top_si->si_type == PERLSI_MAIN)
388	break;	426	break;
389		427
…		…
393	}	431	}
394		432
395	PUTBACK;	433	PUTBACK;
396	}	434	}
397		435
398	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	436	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
399	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	437	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
400	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	438	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		439	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		440	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
401		441
402	c->dowarn = PL_dowarn;	442	#define VAR(name,type)c->name = PL_ ## name;
403	c->in_eval = PL_in_eval;	443	# include "state.h"
404		444	#undef VAR
405	c->curstackinfo = PL_curstackinfo;
406	c->curstack = PL_curstack;
407	c->mainstack = PL_mainstack;
408	c->stack_sp = PL_stack_sp;
409	c->op = PL_op;
410	c->curpad = PL_curpad;
411	c->comppad = PL_comppad;
412	c->compcv = PL_compcv;
413	c->stack_base = PL_stack_base;
414	c->stack_max = PL_stack_max;
415	c->tmps_stack = PL_tmps_stack;
416	c->tmps_floor = PL_tmps_floor;
417	c->tmps_ix = PL_tmps_ix;
418	c->tmps_max = PL_tmps_max;
419	c->markstack = PL_markstack;
420	c->markstack_ptr = PL_markstack_ptr;
421	c->markstack_max = PL_markstack_max;
422	c->scopestack = PL_scopestack;
423	c->scopestack_ix = PL_scopestack_ix;
424	c->scopestack_max = PL_scopestack_max;
425	c->savestack = PL_savestack;
426	c->savestack_ix = PL_savestack_ix;
427	c->savestack_max = PL_savestack_max;
428	#if PERL_VERSION < 9
429	c->retstack = PL_retstack;
430	c->retstack_ix = PL_retstack_ix;
431	c->retstack_max = PL_retstack_max;
432	#endif
433	c->curpm = PL_curpm;
434	c->curcop = PL_curcop;
435	c->top_env = PL_top_env;
436	}	445	}
437		446
438	/*	447	/*
439	* allocate various perl stacks. This is an exact copy	448	* allocate various perl stacks. This is an exact copy
440	* of perl.c:init_stacks, except that it uses less memory	449	* of perl.c:init_stacks, except that it uses less memory
441	* on the (sometimes correct) assumption that coroutines do	450	* on the (sometimes correct) assumption that coroutines do
442	* not usually need a lot of stackspace.	451	* not usually need a lot of stackspace.
443	*/	452	*/
		453	#if CORO_PREFER_PERL_FUNCTIONS
		454	# define coro_init_stacks init_stacks
		455	#else
444	static void	456	static void
445	coro_init_stacks (pTHX)	457	coro_init_stacks (pTHX)
446	{	458	{
447	LOCK;	459	PL_curstackinfo = new_stackinfo(64, 6);
448
449	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
450	PL_curstackinfo->si_type = PERLSI_MAIN;	460	PL_curstackinfo->si_type = PERLSI_MAIN;
451	PL_curstack = PL_curstackinfo->si_stack;	461	PL_curstack = PL_curstackinfo->si_stack;
452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	462	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453		463
454	PL_stack_base = AvARRAY(PL_curstack);	464	PL_stack_base = AvARRAY(PL_curstack);
455	PL_stack_sp = PL_stack_base;	465	PL_stack_sp = PL_stack_base;
456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	466	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457		467
458	New(50,PL_tmps_stack,96,SV*);	468	New(50,PL_tmps_stack,64,SV*);
459	PL_tmps_floor = -1;	469	PL_tmps_floor = -1;
460	PL_tmps_ix = -1;	470	PL_tmps_ix = -1;
461	PL_tmps_max = 96;	471	PL_tmps_max = 64;
462		472
463	New(54,PL_markstack,16,I32);	473	New(54,PL_markstack,16,I32);
464	PL_markstack_ptr = PL_markstack;	474	PL_markstack_ptr = PL_markstack;
465	PL_markstack_max = PL_markstack + 16;	475	PL_markstack_max = PL_markstack + 16;
466		476
…		…
470		480
471	New(54,PL_scopestack,16,I32);	481	New(54,PL_scopestack,16,I32);
472	PL_scopestack_ix = 0;	482	PL_scopestack_ix = 0;
473	PL_scopestack_max = 16;	483	PL_scopestack_max = 16;
474		484
475	New(54,PL_savestack,96,ANY);	485	New(54,PL_savestack,64,ANY);
476	PL_savestack_ix = 0;	486	PL_savestack_ix = 0;
477	PL_savestack_max = 96;	487	PL_savestack_max = 64;
478		488
479	#if PERL_VERSION < 9	489	#if !PERL_VERSION_ATLEAST (5,9,0)
480	New(54,PL_retstack,8,OP*);	490	New(54,PL_retstack,4,OP*);
481	PL_retstack_ix = 0;	491	PL_retstack_ix = 0;
482	PL_retstack_max = 8;	492	PL_retstack_max = 4;
483	#endif	493	#endif
484
485	UNLOCK;
486	}	494	}
		495	#endif
487		496
488	/*	497	/*
489	* destroy the stacks, the callchain etc...	498	* destroy the stacks, the callchain etc...
490	*/	499	*/
491	static void	500	static void
492	destroy_stacks(pTHX)	501	coro_destroy_stacks (pTHX)
493	{	502	{
494	if (!IN_DESTRUCT)	503	if (!IN_DESTRUCT)
495	{	504	{
496	/* is this ugly, I ask? */	505	/* restore all saved variables and stuff */
497	LEAVE_SCOPE (0);	506	LEAVE_SCOPE (0);
		507	assert (PL_tmps_floor == -1);
498		508
499	/* sure it is, but more important: is it correct?? :/ */	509	/* free all temporaries */
500	FREETMPS;	510	FREETMPS;
		511	assert (PL_tmps_ix == -1);
501		512
		513	/* unwind all extra stacks */
502	/POPSTACK_TO (PL_mainstack);//D//use/	514	POPSTACK_TO (PL_mainstack);
		515
		516	/* unwind main stack */
		517	dounwind (-1);
503	}	518	}
504		519
505	while (PL_curstackinfo->si_next)	520	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	521	PL_curstackinfo = PL_curstackinfo->si_next;
507		522
508	while (PL_curstackinfo)	523	while (PL_curstackinfo)
509	{	524	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	525	PERL_SI *p = PL_curstackinfo->si_prev;
511		526
512	{ /D//remove/
513	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */
516	}
517
518	if (!IN_DESTRUCT)	527	if (!IN_DESTRUCT)
519	{
520	dounwind (-1);/D//remove/
521	SvREFCNT_dec (PL_curstackinfo->si_stack);	528	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}
523		529
524	Safefree (PL_curstackinfo->si_cxstack);	530	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree (PL_curstackinfo);	531	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	532	PL_curstackinfo = p;
527	}	533	}
528		534
529	Safefree (PL_tmps_stack);	535	Safefree (PL_tmps_stack);
530	Safefree (PL_markstack);	536	Safefree (PL_markstack);
531	Safefree (PL_scopestack);	537	Safefree (PL_scopestack);
532	Safefree (PL_savestack);	538	Safefree (PL_savestack);
533	#if PERL_VERSION < 9	539	#if !PERL_VERSION_ATLEAST (5,9,0)
534	Safefree (PL_retstack);	540	Safefree (PL_retstack);
535	#endif	541	#endif
536	}	542	}
537		543
538	static void	544	static size_t
539	allocate_stack (Coro__State ctx, int alloc)	545	coro_rss (struct coro *coro)
540	{	546	{
541	coro_stack *stack;	547	size_t rss = sizeof (coro);
542		548
543	New (0, stack, 1, coro_stack);	549	if (coro->mainstack)
544
545	stack->refcnt = 1;
546	stack->usecnt = 1;
547	stack->gencnt = ctx->gencnt = 0;
548
549	if (alloc)
550	{	550	{
551	#if HAVE_MMAP	551	if (coro->flags & CF_RUNNING)
552	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
553	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
554	if (stack->sptr != (void *)-1)
555	{	552	{
556	# if STACKGUARD	553	#define VAR(name,type)coro->name = PL_ ## name;
557	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	554	# include "state.h"
558	# endif	555	#undef VAR
559	}	556	}
560	else
561	#endif
562	{
563	stack->ssize = - (STACKSIZE * (long)sizeof (long));
564	New (0, stack->sptr, STACKSIZE, long);
565	}
566	}
567	else
568	stack->sptr = 0;
569		557
570	ctx->stack = stack;	558	rss += sizeof (coro->curstackinfo);
571	}	559	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		560	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		561	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		562	rss += coro->tmps_max * sizeof (SV *);
		563	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		564	rss += coro->scopestack_max * sizeof (I32);
		565	rss += coro->savestack_max * sizeof (ANY);
572		566
573	static void	567	#if !PERL_VERSION_ATLEAST (5,9,0)
574	deallocate_stack (Coro__State ctx)	568	rss += coro->retstack_max * sizeof (OP *);
575	{	569	#endif
576	coro_stack *stack = ctx->stack;
577
578	ctx->stack = 0;
579
580	if (stack)
581	{	570	}
582	if (!--stack->refcnt)
583	{
584	#ifdef HAVE_MMAP
585	if (stack->ssize > 0 && stack->sptr)
586	munmap (stack->sptr, stack->ssize);
587	else
588	#endif
589	Safefree (stack->sptr);
590		571
591	Safefree (stack);	572	return rss;
592	}
593	else if (ctx->gencnt == stack->gencnt)
594	--stack->usecnt;
595	}
596	}	573	}
597		574
		575	/ coroutine stack handling **********************************************/
		576
598	static void	577	static void
599	setup_coro (void *arg)	578	setup_coro (pTHX_ struct coro *coro)
600	{	579	{
601	/*	580	/*
602	* emulate part of the perl startup here.	581	* emulate part of the perl startup here.
603	*/	582	*/
		583	coro_init_stacks (aTHX);
		584
		585	PL_curcop = &PL_compiling;
		586	PL_in_eval = EVAL_NULL;
		587	PL_comppad = 0;
		588	PL_curpm = 0;
		589	PL_localizing = 0;
		590	PL_dirty = 0;
		591	PL_restartop = 0;
		592
		593	{
		594	dSP;
		595	LOGOP myop;
		596
		597	SvREFCNT_dec (GvAV (PL_defgv));
		598	GvAV (PL_defgv) = coro->args; coro->args = 0;
		599
		600	Zero (&myop, 1, LOGOP);
		601	myop.op_next = Nullop;
		602	myop.op_flags = OPf_WANT_VOID;
		603
		604	PUSHMARK (SP);
		605	XPUSHs (av_shift (GvAV (PL_defgv)));
		606	PUTBACK;
		607	PL_op = (OP *)&myop;
		608	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		609	SPAGAIN;
		610	}
		611
		612	ENTER; /* necessary e.g. for dounwind */
		613	}
		614
		615	static void
		616	free_coro_mortal (pTHX)
		617	{
		618	if (coro_mortal)
		619	{
		620	SvREFCNT_dec (coro_mortal);
		621	coro_mortal = 0;
		622	}
		623	}
		624
		625	/* inject a fake call to Coro::State::_cctx_init into the execution */
		626	/* _cctx_init should be careful, as it could be called at almost any time */
		627	/* during execution of a perl program */
		628	static void NOINLINE
		629	prepare_cctx (pTHX_ coro_cctx *cctx)
		630	{
		631	dSP;
		632	LOGOP myop;
		633
		634	Zero (&myop, 1, LOGOP);
		635	myop.op_next = PL_op;
		636	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		637
		638	PUSHMARK (SP);
		639	EXTEND (SP, 2);
		640	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		641	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		642	PUTBACK;
		643	PL_op = (OP *)&myop;
		644	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		645	SPAGAIN;
		646	}
		647
		648	/*
		649	* this is a _very_ stripped down perl interpreter ;)
		650	*/
		651	static void
		652	coro_run (void *arg)
		653	{
604	dTHX;	654	dTHX;
605	dSP;
606	Coro__State ctx = (Coro__State)arg;
607	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
608		655
609	coro_init_stacks (aTHX);	656	/* coro_run is the alternative tail of transfer(), so unlock here. */
610	/PL_curcop = 0;/	657	UNLOCK;
611	/PL_in_eval = PL_in_eval;/ /* inherit */
612	SvREFCNT_dec (GvAV (PL_defgv));
613	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
614		658
615	SPAGAIN;	659	PL_top_env = &PL_start_env;
616		660
617	if (ctx->stack)	661	/* inject a fake subroutine call to cctx_init */
618	{	662	prepare_cctx (aTHX_ (coro_cctx *)arg);
619	ctx->cursp = 0;
620		663
621	PUSHMARK(SP);	664	/* somebody or something will hit me for both perl_run and PL_restartop */
622	PUTBACK;	665	PL_restartop = PL_op;
623	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);	666	perl_run (PL_curinterp);
624		667
625	if (SvTRUE (ERRSV))	668	/*
626	croak (NULL);	669	* If perl-run returns we assume exit() was being called or the coro
627	else	670	* fell off the end, which seems to be the only valid (non-bug)
628	croak ("FATAL: CCTXT coroutine returned!");	671	* reason for perl_run to return. We try to exit by jumping to the
		672	* bootstrap-time "top" top_env, as we cannot restore the "main"
		673	* coroutine as Coro has no such concept
		674	*/
		675	PL_top_env = main_top_env;
		676	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		677	}
		678
		679	static coro_cctx *
		680	cctx_new ()
		681	{
		682	coro_cctx *cctx;
		683	void *stack_start;
		684	size_t stack_size;
		685
		686	++cctx_count;
		687
		688	Newz (0, cctx, 1, coro_cctx);
		689
		690	#if HAVE_MMAP
		691
		692	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		693	/* mmap supposedly does allocate-on-write for us */
		694	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		695
		696	if (cctx->sptr != (void *)-1)
		697	{
		698	# if CORO_STACKGUARD
		699	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		700	# endif
		701	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		702	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		703	cctx->mapped = 1;
629	}	704	}
630	else	705	else
631	{	706	#endif
632	UNOP myop;
633
634	PL_op = (OP *)&myop;
635
636	Zero(&myop, 1, UNOP);
637	myop.op_next = Nullop;
638	myop.op_flags = OPf_WANT_VOID;
639
640	PUSHMARK(SP);
641	XPUSHs (sub_init);
642	/*
643	* the next line is slightly wrong, as PL_op->op_next
644	* is actually being executed so we skip the first op.
645	* that doesn't matter, though, since it is only
646	* pp_nextstate and we never return...
647	* ah yes, and I don't care anyways ;)
648	*/
649	PUTBACK;
650	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
651	SPAGAIN;
652
653	ENTER; /* necessary e.g. for dounwind */
654	}	707	{
655	}	708	cctx->ssize = coro_stacksize * (long)sizeof (long);
		709	New (0, cctx->sptr, coro_stacksize, long);
656		710
657	static void	711	if (!cctx->sptr)
658	continue_coro (void *arg)	712	{
659	{	713	perror ("FATAL: unable to allocate stack for coroutine");
660	/*	714	_exit (EXIT_FAILURE);
661	* this is a _very_ stripped down perl interpreter ;)	715	}
662	*/
663	dTHX;
664	Coro__State ctx = (Coro__State)arg;
665		716
666	PL_top_env = &ctx->start_env;	717	stack_start = cctx->sptr;
		718	stack_size = cctx->ssize;
		719	}
667		720
668	ctx->cursp = 0;	721	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		722	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		723
		724	return cctx;
		725	}
		726
		727	static void
		728	cctx_destroy (coro_cctx *cctx)
		729	{
		730	if (!cctx)
		731	return;
		732
		733	--cctx_count;
		734
		735	#if CORO_USE_VALGRIND
		736	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		737	#endif
		738
		739	#if HAVE_MMAP
		740	if (cctx->mapped)
		741	munmap (cctx->sptr, cctx->ssize);
		742	else
		743	#endif
		744	Safefree (cctx->sptr);
		745
		746	Safefree (cctx);
		747	}
		748
		749	static coro_cctx *
		750	cctx_get (pTHX)
		751	{
		752	while (cctx_first)
		753	{
		754	coro_cctx *cctx = cctx_first;
		755	cctx_first = cctx->next;
		756	--cctx_idle;
		757
		758	if (cctx->ssize >= coro_stacksize)
		759	return cctx;
		760
		761	cctx_destroy (cctx);
		762	}
		763
669	PL_op = PL_op->op_next;	764	PL_op = PL_op->op_next;
670	CALLRUNOPS(aTHX);	765	return cctx_new ();
671
672	abort ();
673	}	766	}
674		767
675	static void	768	static void
		769	cctx_put (coro_cctx *cctx)
		770	{
		771	/* free another cctx if overlimit */
		772	if (cctx_idle >= MAX_IDLE_CCTX)
		773	{
		774	coro_cctx *first = cctx_first;
		775	cctx_first = first->next;
		776	--cctx_idle;
		777
		778	assert (!first->inuse);
		779	cctx_destroy (first);
		780	}
		781
		782	++cctx_idle;
		783	cctx->next = cctx_first;
		784	cctx_first = cctx;
		785	}
		786
		787	/ coroutine switching ***************************************************/
		788
		789	/* never call directly, always through the coro_state_transfer global variable */
		790	static void NOINLINE
676	transfer (pTHX_ struct coro prev, struct coro next, int flags)	791	transfer (pTHX_ struct coro prev, struct coro next)
677	{	792	{
678	dSTACKLEVEL;	793	dSTACKLEVEL;
679		794
		795	/* sometimes transfer is only called to set idle_sp */
		796	if (!next)
		797	{
		798	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		799	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		800	}
680	if (prev != next)	801	else if (prev != next)
681	{	802	{
682	if (next->mainstack)	803	coro_cctx *prev__cctx;
		804
		805	if (prev->flags & CF_NEW)
683	{	806	{
684	LOCK;	807	/* create a new empty context */
685	SAVE (prev, flags);	808	Newz (0, prev->cctx, 1, coro_cctx);
686	LOAD (next);	809	prev->cctx->inuse = 1;
687	UNLOCK;	810	prev->flags &= ~CF_NEW;
688		811	prev->flags \|= CF_RUNNING;
689	/* mark this state as in-use */
690	next->mainstack = 0;
691	next->tmps_ix = -2;
692
693	/* stacklevel changed? if yes, grab the stack for us! */
694	if (flags & TRANSFER_SAVE_CCTXT)
695	{
696	if (!prev->stack)
697	allocate_stack (prev, 0);
698	else if (prev->cursp != stacklevel
699	&& prev->stack->usecnt > 1)
700	{
701	prev->gencnt = ++prev->stack->gencnt;
702	prev->stack->usecnt = 1;
703	}
704
705	/* has our stack been invalidated? */
706	if (next->stack && next->stack->gencnt != next->gencnt)
707	{
708	deallocate_stack (next);
709	allocate_stack (next, 1);
710	coro_create (&(next->stack->cctx),
711	continue_coro, (void *)next,
712	next->stack->sptr, labs (next->stack->ssize));
713	}
714
715	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716	prev->cursp = stacklevel;
717	/* don't add any code here */
718	}
719	else
720	next->cursp = stacklevel;
721	}	812	}
722	else if (next->tmps_ix == -2)	813
723	croak ("tried to transfer to running coroutine");	814	/TODO: must not croak here /
		815	if (!prev->flags & CF_RUNNING)
		816	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		817
		818	if (next->flags & CF_RUNNING)
		819	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		820
		821	if (next->flags & CF_DESTROYED)
		822	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		823
		824	prev->flags &= ~CF_RUNNING;
		825	next->flags \|= CF_RUNNING;
		826
		827	LOCK;
		828
		829	if (next->flags & CF_NEW)
		830	{
		831	/* need to start coroutine */
		832	next->flags &= ~CF_NEW;
		833	/* first get rid of the old state */
		834	save_perl (aTHX_ prev);
		835	/* setup coroutine call */
		836	setup_coro (aTHX_ next);
		837	/* need a new stack */
		838	assert (!next->cctx);
		839	}
724	else	840	else
725	{	841	{
726	LOCK;	842	/* coroutine already started */
727	SAVE (prev, -1); /* first get rid of the old state */	843	save_perl (aTHX_ prev);
728	UNLOCK;	844	load_perl (aTHX_ next);
729
730	if (flags & TRANSFER_SAVE_CCTXT)
731	{
732	if (!prev->stack)
733	allocate_stack (prev, 0);
734
735	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
736	{
737	PL_top_env = &next->start_env;
738
739	setup_coro (next);
740	next->cursp = stacklevel;
741
742	prev->stack->refcnt++;
743	prev->stack->usecnt++;
744	next->stack = prev->stack;
745	next->gencnt = prev->gencnt;
746	}
747	else
748	{
749	assert (!next->stack);
750	allocate_stack (next, 1);
751	coro_create (&(next->stack->cctx),
752	setup_coro, (void *)next,
753	next->stack->sptr, labs (next->stack->ssize));
754	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755	prev->cursp = stacklevel;
756	/* don't add any code here */
757	}
758	}
759	else
760	{
761	setup_coro (next);
762	next->cursp = stacklevel;
763	}
764	}	845	}
765	}
766		846
767	LOCK;	847	prev__cctx = prev->cctx;
768	if (coro_mortal)	848
769	{	849	/* possibly "free" the cctx */
770	SvREFCNT_dec (coro_mortal);	850	if (prev__cctx->idle_sp == STACKLEVEL)
771	coro_mortal = 0;	851	{
772	}	852	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		853	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		854
		855	prev->cctx = 0;
		856
		857	cctx_put (prev__cctx);
		858	prev__cctx->inuse = 0;
		859	}
		860
		861	if (!next->cctx)
		862	{
		863	next->cctx = cctx_get (aTHX);
		864	assert (!next->cctx->inuse);
		865	next->cctx->inuse = 1;
		866	}
		867
		868	if (prev__cctx != next->cctx)
		869	{
		870	prev__cctx->top_env = PL_top_env;
		871	PL_top_env = next->cctx->top_env;
		872	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		873	}
		874
		875	free_coro_mortal (aTHX);
773	UNLOCK;	876	UNLOCK;
		877	}
774	}	878	}
775		879
776	#define SV_CORO(sv,func) \	880	struct transfer_args
777	do { \	881	{
778	if (SvROK (sv)) \	882	struct coro prev, next;
779	sv = SvRV (sv); \	883	};
780	\
781	if (SvTYPE (sv) == SVt_PVHV) \
782	{ \
783	HE he = hv_fetch_ent ((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
784	\
785	if (!he) \
786	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787	\
788	(sv) = SvRV (HeVAL(he)); \
789	} \
790	\
791	/* must also be changed inside Coro::Cont::yield */ \
792	if (!SvOBJECT (sv) \|\| SvSTASH (sv) != coro_state_stash) \
793	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794	\
795	} while(0)
796		884
797	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	885	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
798		886
		887	/ high level stuff ******************************************************/
		888
799	static void	889	static int
		890	coro_state_destroy (pTHX_ struct coro *coro)
		891	{
		892	if (coro->flags & CF_DESTROYED)
		893	return 0;
		894
		895	coro->flags \|= CF_DESTROYED;
		896
		897	if (coro->flags & CF_READY)
		898	{
		899	/* reduce nready, as destroying a ready coro effectively unreadies it */
		900	/* alternative: look through all ready queues and remove the coro */
		901	LOCK;
		902	--coro_nready;
		903	UNLOCK;
		904	}
		905	else
		906	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
		907
		908	if (coro->mainstack && coro->mainstack != main_mainstack)
		909	{
		910	struct coro temp;
		911
		912	assert (!(coro->flags & CF_RUNNING));
		913
		914	Zero (&temp, 1, struct coro);
		915	temp.save = CORO_SAVE_ALL;
		916
		917	if (coro->flags & CF_RUNNING)
		918	croak ("FATAL: tried to destroy currently running coroutine");
		919
		920	save_perl (aTHX_ &temp);
		921	load_perl (aTHX_ coro);
		922
		923	coro_destroy_stacks (aTHX);
		924
		925	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		926
		927	coro->mainstack = 0;
		928	}
		929
		930	cctx_destroy (coro->cctx);
		931	SvREFCNT_dec (coro->args);
		932
		933	if (coro->next) coro->next->prev = coro->prev;
		934	if (coro->prev) coro->prev->next = coro->next;
		935	if (coro == coro_first) coro_first = coro->next;
		936
		937	return 1;
		938	}
		939
		940	static int
		941	coro_state_free (pTHX_ SV sv, MAGIC mg)
		942	{
		943	struct coro coro = (struct coro )mg->mg_ptr;
		944	mg->mg_ptr = 0;
		945
		946	coro->hv = 0;
		947
		948	if (--coro->refcnt < 0)
		949	{
		950	coro_state_destroy (aTHX_ coro);
		951	Safefree (coro);
		952	}
		953
		954	return 0;
		955	}
		956
		957	static int
		958	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		959	{
		960	struct coro coro = (struct coro )mg->mg_ptr;
		961
		962	++coro->refcnt;
		963
		964	return 0;
		965	}
		966
		967	static MGVTBL coro_state_vtbl = {
		968	0, 0, 0, 0,
		969	coro_state_free,
		970	0,
		971	#ifdef MGf_DUP
		972	coro_state_dup,
		973	#else
		974	# define MGf_DUP 0
		975	#endif
		976	};
		977
		978	static struct coro *
		979	SvSTATE_ (pTHX_ SV *coro)
		980	{
		981	HV *stash;
		982	MAGIC *mg;
		983
		984	if (SvROK (coro))
		985	coro = SvRV (coro);
		986
		987	stash = SvSTASH (coro);
		988	if (stash != coro_stash && stash != coro_state_stash)
		989	{
		990	/* very slow, but rare, check */
		991	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		992	croak ("Coro::State object required");
		993	}
		994
		995	mg = CORO_MAGIC (coro);
		996	return (struct coro *)mg->mg_ptr;
		997	}
		998
		999	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1000
		1001	static void
		1002	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1003	{
		1004	ta->prev = SvSTATE (prev_sv);
		1005	ta->next = SvSTATE (next_sv);
		1006	}
		1007
		1008	static void
800	api_transfer(pTHX_ SV prev, SV next, int flags)	1009	api_transfer (SV prev_sv, SV next_sv)
801	{	1010	{
802	SV_CORO (prev, "Coro::transfer");	1011	dTHX;
803	SV_CORO (next, "Coro::transfer");	1012	struct transfer_args ta;
804		1013
805	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1014	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1015	TRANSFER (ta);
		1016	}
		1017
		1018	static int
		1019	api_save (SV *coro_sv, int new_save)
		1020	{
		1021	dTHX;
		1022	struct coro *coro = SvSTATE (coro_sv);
		1023	int old_save = coro->save;
		1024
		1025	if (new_save >= 0)
		1026	coro->save = new_save;
		1027
		1028	return old_save;
806	}	1029	}
807		1030
808	/ Coro ******************************************************************/	1031	/ Coro ******************************************************************/
809		1032
810	#define PRIO_MAX 3
811	#define PRIO_HIGH 1
812	#define PRIO_NORMAL 0
813	#define PRIO_LOW -1
814	#define PRIO_IDLE -3
815	#define PRIO_MIN -4
816
817	/* for Coro.pm */
818	static GV coro_current, coro_idle;
819	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
820	static int coro_nready;
821
822	static void	1033	static void
823	coro_enq (pTHX_ SV *sv)	1034	coro_enq (pTHX_ SV *coro_sv)
824	{	1035	{
825	SV **xprio;
826	int prio;
827
828	if (SvTYPE (sv) != SVt_PVHV)
829	croak ("Coro::ready tried to enqueue something that is not a coroutine");
830
831	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
832	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
833
834	prio = prio > PRIO_MAX ? PRIO_MAX
835	: prio < PRIO_MIN ? PRIO_MIN
836	: prio;
837
838	av_push (coro_ready [prio - PRIO_MIN], sv);	1036	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
839	coro_nready++;
840	}	1037	}
841		1038
842	static SV *	1039	static SV *
843	coro_deq (pTHX_ int min_prio)	1040	coro_deq (pTHX_ int min_prio)
844	{	1041	{
…		…
847	min_prio -= PRIO_MIN;	1044	min_prio -= PRIO_MIN;
848	if (min_prio < 0)	1045	if (min_prio < 0)
849	min_prio = 0;	1046	min_prio = 0;
850		1047
851	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1048	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852	if (av_len (coro_ready[prio]) >= 0)	1049	if (AvFILLp (coro_ready [prio]) >= 0)
853	{
854	coro_nready--;
855	return av_shift (coro_ready[prio]);	1050	return av_shift (coro_ready [prio]);
856	}
857		1051
858	return 0;	1052	return 0;
859	}	1053	}
860		1054
861	static void	1055	static int
862	api_ready (SV *coro)	1056	api_ready (SV *coro_sv)
863	{	1057	{
864	dTHX;	1058	dTHX;
		1059	struct coro *coro;
865		1060
866	if (SvROK (coro))	1061	if (SvROK (coro_sv))
867	coro = SvRV (coro);	1062	coro_sv = SvRV (coro_sv);
		1063
		1064	coro = SvSTATE (coro_sv);
		1065
		1066	if (coro->flags & CF_READY)
		1067	return 0;
		1068
		1069	coro->flags \|= CF_READY;
868		1070
869	LOCK;	1071	LOCK;
870	coro_enq (aTHX_ SvREFCNT_inc (coro));	1072	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1073	++coro_nready;
871	UNLOCK;	1074	UNLOCK;
		1075
		1076	return 1;
		1077	}
		1078
		1079	static int
		1080	api_is_ready (SV *coro_sv)
		1081	{
		1082	dTHX;
		1083	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1084	}
		1085
		1086	static void
		1087	prepare_schedule (pTHX_ struct transfer_args *ta)
		1088	{
		1089	SV prev_sv, next_sv;
		1090
		1091	for (;;)
		1092	{
		1093	LOCK;
		1094	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1095
		1096	/* nothing to schedule: call the idle handler */
		1097	if (!next_sv)
		1098	{
		1099	dSP;
		1100	UNLOCK;
		1101
		1102	ENTER;
		1103	SAVETMPS;
		1104
		1105	PUSHMARK (SP);
		1106	PUTBACK;
		1107	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1108
		1109	FREETMPS;
		1110	LEAVE;
		1111	continue;
		1112	}
		1113
		1114	ta->next = SvSTATE (next_sv);
		1115
		1116	/* cannot transfer to destroyed coros, skip and look for next */
		1117	if (ta->next->flags & CF_DESTROYED)
		1118	{
		1119	UNLOCK;
		1120	SvREFCNT_dec (next_sv);
		1121	/* coro_nready is already taken care of by destroy */
		1122	continue;
		1123	}
		1124
		1125	--coro_nready;
		1126	UNLOCK;
		1127	break;
		1128	}
		1129
		1130	/* free this only after the transfer */
		1131	prev_sv = SvRV (coro_current);
		1132	SvRV_set (coro_current, next_sv);
		1133	ta->prev = SvSTATE (prev_sv);
		1134
		1135	assert (ta->next->flags & CF_READY);
		1136	ta->next->flags &= ~CF_READY;
		1137
		1138	LOCK;
		1139	free_coro_mortal (aTHX);
		1140	coro_mortal = prev_sv;
		1141	UNLOCK;
		1142	}
		1143
		1144	static void
		1145	prepare_cede (pTHX_ struct transfer_args *ta)
		1146	{
		1147	api_ready (coro_current);
		1148	prepare_schedule (aTHX_ ta);
		1149	}
		1150
		1151	static int
		1152	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1153	{
		1154	if (coro_nready)
		1155	{
		1156	SV *prev = SvRV (coro_current);
		1157	prepare_schedule (aTHX_ ta);
		1158	api_ready (prev);
		1159	return 1;
		1160	}
		1161	else
		1162	return 0;
872	}	1163	}
873		1164
874	static void	1165	static void
875	api_schedule (void)	1166	api_schedule (void)
876	{	1167	{
877	dTHX;	1168	dTHX;
		1169	struct transfer_args ta;
878		1170
879	SV prev, next;	1171	prepare_schedule (aTHX_ &ta);
880		1172	TRANSFER (ta);
881	LOCK;
882
883	prev = SvRV (GvSV (coro_current));
884	next = coro_deq (aTHX_ PRIO_MIN);
885
886	if (!next)
887	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
888
889	/* free this only after the transfer */
890	coro_mortal = prev;
891	SV_CORO (prev, "Coro::schedule");
892
893	SvRV (GvSV (coro_current)) = next;
894
895	SV_CORO (next, "Coro::schedule");
896
897	UNLOCK;
898
899	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
900	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
901	}	1173	}
902		1174
903	static void	1175	static int
904	api_cede (void)	1176	api_cede (void)
905	{	1177	{
906	dTHX;	1178	dTHX;
		1179	struct transfer_args ta;
907		1180
908	LOCK;	1181	prepare_cede (aTHX_ &ta);
909	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
910	UNLOCK;
911		1182
912	api_schedule ();	1183	if (ta.prev != ta.next)
		1184	{
		1185	TRANSFER (ta);
		1186	return 1;
		1187	}
		1188	else
		1189	return 0;
		1190	}
		1191
		1192	static int
		1193	api_cede_notself (void)
		1194	{
		1195	dTHX;
		1196	struct transfer_args ta;
		1197
		1198	if (prepare_cede_notself (aTHX_ &ta))
		1199	{
		1200	TRANSFER (ta);
		1201	return 1;
		1202	}
		1203	else
		1204	return 0;
913	}	1205	}
914		1206
915	MODULE = Coro::State PACKAGE = Coro::State	1207	MODULE = Coro::State PACKAGE = Coro::State
916		1208
917	PROTOTYPES: ENABLE	1209	PROTOTYPES: DISABLE
918		1210
919	BOOT:	1211	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1212	{
921	#ifdef USE_ITHREADS	1213	#ifdef USE_ITHREADS
922	MUTEX_INIT (&coro_mutex);	1214	MUTEX_INIT (&coro_mutex);
923	#endif	1215	#endif
924	BOOT_PAGESIZE;	1216	BOOT_PAGESIZE;
925		1217
926	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
927	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
928	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1218	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929		1219
930	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1220	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
931	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1221	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
932	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1222	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1223	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1224	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
933	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1225	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1226	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
934		1227
935	main_mainstack = PL_mainstack;	1228	main_mainstack = PL_mainstack;
		1229	main_top_env = PL_top_env;
		1230
		1231	while (main_top_env->je_prev)
		1232	main_top_env = main_top_env->je_prev;
936		1233
937	coroapi.ver = CORO_API_VERSION;	1234	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1235	coroapi.transfer = api_transfer;
939	}
940		1236
941	Coro::State	1237	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1238	}
943	SV * args	1239
944	PROTOTYPE: $	1240	SV *
		1241	new (char *klass, ...)
945	CODE:	1242	CODE:
946	Coro__State coro;	1243	{
		1244	struct coro *coro;
		1245	HV *hv;
		1246	int i;
947		1247
948	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
949	croak ("Coro::State::_newprocess expects an arrayref");
950
951	Newz (0, coro, 1, struct coro);	1248	Newz (0, coro, 1, struct coro);
		1249	coro->args = newAV ();
		1250	coro->save = CORO_SAVE_DEF;
		1251	coro->flags = CF_NEW;
952		1252
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1253	if (coro_first) coro_first->prev = coro;
954	/coro->mainstack = 0; //actual work is done inside transfer /	1254	coro->next = coro_first;
955	/coro->stack = 0;/	1255	coro_first = coro;
956		1256
957	/* same as JMPENV_BOOTSTRAP */	1257	coro->hv = hv = newHV ();
958	/* we might be able to recycle start_env, but safe is safe */	1258	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
959	/Zero(&coro->start_env, 1, JMPENV);/	1259	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
960	coro->start_env.je_ret = -1;
961	coro->start_env.je_mustcatch = TRUE;
962		1260
963	RETVAL = coro;	1261	for (i = 1; i < items; i++)
		1262	av_push (coro->args, newSVsv (ST (i)));
		1263	}
964	OUTPUT:	1264	OUTPUT:
965	RETVAL	1265	RETVAL
966		1266
		1267	int
		1268	save (SV *coro, int new_save = -1)
		1269	CODE:
		1270	RETVAL = api_save (coro, new_save);
		1271	OUTPUT:
		1272	RETVAL
		1273
		1274	int
		1275	save_also (SV *coro_sv, int save_also)
		1276	CODE:
		1277	{
		1278	struct coro *coro = SvSTATE (coro_sv);
		1279	RETVAL = coro->save;
		1280	coro->save \|= save_also;
		1281	}
		1282	OUTPUT:
		1283	RETVAL
		1284
967	void	1285	void
968	transfer(prev, next, flags)	1286	_set_stacklevel (...)
969	SV *prev	1287	ALIAS:
970	SV *next	1288	Coro::State::transfer = 1
971	int flags	1289	Coro::schedule = 2
972	PROTOTYPE: @	1290	Coro::cede = 3
		1291	Coro::cede_notself = 4
973	CODE:	1292	CODE:
974	PUTBACK;	1293	{
975	SV_CORO (next, "Coro::transfer");	1294	struct transfer_args ta;
976	SV_CORO (prev, "Coro::transfer");	1295
977	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1296	switch (ix)
978	SPAGAIN;	1297	{
		1298	case 0:
		1299	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1300	ta.next = 0;
		1301	break;
		1302
		1303	case 1:
		1304	if (items != 2)
		1305	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1306
		1307	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1308	break;
		1309
		1310	case 2:
		1311	prepare_schedule (aTHX_ &ta);
		1312	break;
		1313
		1314	case 3:
		1315	prepare_cede (aTHX_ &ta);
		1316	break;
		1317
		1318	case 4:
		1319	if (!prepare_cede_notself (aTHX_ &ta))
		1320	XSRETURN_EMPTY;
		1321
		1322	break;
		1323	}
		1324
		1325	BARRIER;
		1326	TRANSFER (ta);
		1327
		1328	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1329	XSRETURN_YES;
		1330	}
		1331
		1332	bool
		1333	_destroy (SV *coro_sv)
		1334	CODE:
		1335	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1336	OUTPUT:
		1337	RETVAL
979		1338
980	void	1339	void
981	DESTROY(coro)
982	Coro::State coro
983	CODE:
984
985	if (coro->mainstack && coro->mainstack != main_mainstack)
986	{
987	struct coro temp;
988
989	PUTBACK;
990	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
991	LOAD (aTHX_ coro);
992	SPAGAIN;
993
994	destroy_stacks (aTHX);
995
996	LOAD ((&temp)); /* this will get rid of defsv etc.. */
997	SPAGAIN;
998
999	coro->mainstack = 0;
1000	}
1001
1002	deallocate_stack (coro);
1003	SvREFCNT_dec (coro->args);
1004	Safefree (coro);
1005
1006	void
1007	_exit(code)	1340	_exit (code)
1008	int code	1341	int code
1009	PROTOTYPE: $	1342	PROTOTYPE: $
1010	CODE:	1343	CODE:
1011	_exit (code);	1344	_exit (code);
1012		1345
1013	MODULE = Coro::State PACKAGE = Coro::Cont	1346	int
		1347	cctx_stacksize (int new_stacksize = 0)
		1348	CODE:
		1349	RETVAL = coro_stacksize;
		1350	if (new_stacksize)
		1351	coro_stacksize = new_stacksize;
		1352	OUTPUT:
		1353	RETVAL
1014		1354
1015	# this is slightly dirty (should expose a c-level api)	1355	int
		1356	cctx_count ()
		1357	CODE:
		1358	RETVAL = cctx_count;
		1359	OUTPUT:
		1360	RETVAL
		1361
		1362	int
		1363	cctx_idle ()
		1364	CODE:
		1365	RETVAL = cctx_idle;
		1366	OUTPUT:
		1367	RETVAL
1016		1368
1017	void	1369	void
1018	yield(...)	1370	list ()
1019	PROTOTYPE: @	1371	PPCODE:
		1372	{
		1373	struct coro *coro;
		1374	for (coro = coro_first; coro; coro = coro->next)
		1375	if (coro->hv)
		1376	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1377	}
		1378
		1379	void
		1380	_eval (Coro::State coro, SV *coderef)
		1381	CODE:
		1382	{
		1383	if (coro->mainstack)
		1384	{
		1385	struct coro temp;
		1386	Zero (&temp, 1, struct coro);
		1387	temp.save = CORO_SAVE_ALL;
		1388
		1389	if (!(coro->flags & CF_RUNNING))
		1390	{
		1391	save_perl (aTHX_ &temp);
		1392	load_perl (aTHX_ coro);
		1393	}
		1394
		1395	{
		1396	dSP;
		1397	ENTER;
		1398	SAVETMPS;
		1399	PUSHMARK (SP);
		1400	PUTBACK;
		1401	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1402	SPAGAIN;
		1403	FREETMPS;
		1404	LEAVE;
		1405	PUTBACK;
		1406	}
		1407
		1408	if (!(coro->flags & CF_RUNNING))
		1409	{
		1410	save_perl (aTHX_ coro);
		1411	load_perl (aTHX_ &temp);
		1412	}
		1413	}
		1414	}
		1415
		1416	SV *
		1417	is_ready (Coro::State coro)
		1418	PROTOTYPE: $
		1419	ALIAS:
		1420	is_ready = CF_READY
		1421	is_running = CF_RUNNING
		1422	is_new = CF_NEW
		1423	is_destroyed = CF_DESTROYED
		1424	CODE:
		1425	RETVAL = boolSV (coro->flags & ix);
		1426	OUTPUT:
		1427	RETVAL
		1428
		1429	IV
		1430	rss (Coro::State coro)
		1431	PROTOTYPE: $
1020	CODE:	1432	CODE:
1021	SV *yieldstack;	1433	RETVAL = coro_rss (coro);
1022	SV *sv;	1434	OUTPUT:
1023	AV *defav = GvAV (PL_defgv);	1435	RETVAL
1024	struct coro prev, next;
1025		1436
1026	yieldstack = *hv_fetch (
1027	(HV *)SvRV (GvSV (coro_current)),
1028	"yieldstack", sizeof ("yieldstack") - 1,
1029	0
1030	);
1031
1032	/* set up @_ -- ugly */
1033	av_clear (defav);
1034	av_fill (defav, items - 1);
1035	while (items--)
1036	av_store (defav, items, SvREFCNT_inc (ST(items)));
1037
1038	sv = av_pop ((AV *)SvRV (yieldstack));
1039	prev = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0))));
1040	next = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0))));
1041	SvREFCNT_dec (sv);
1042
1043	transfer (aTHX_ prev, next, 0);
1044		1437
1045	MODULE = Coro::State PACKAGE = Coro	1438	MODULE = Coro::State PACKAGE = Coro
1046		1439
1047	# this is slightly dirty (should expose a c-level api)
1048
1049	BOOT:	1440	BOOT:
1050	{	1441	{
1051	int i;	1442	int i;
		1443
1052	HV *stash = gv_stashpv ("Coro", TRUE);	1444	coro_stash = gv_stashpv ("Coro", TRUE);
1053		1445
1054	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1446	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1055	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1447	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1056	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1448	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1057	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1449	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1058	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1450	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1059	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1451	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1060		1452
1061	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1453	coro_current = get_sv ("Coro::current", FALSE);
1062	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1454	SvREADONLY_on (coro_current);
1063		1455
1064	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1456	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1065	coro_ready[i] = newAV ();	1457	coro_ready[i] = newAV ();
1066		1458
1067	{	1459	{
1068	SV *sv = perl_get_sv("Coro::API", 1);	1460	SV *sv = perl_get_sv("Coro::API", 1);
1069		1461
1070	coroapi.schedule = api_schedule;	1462	coroapi.schedule = api_schedule;
		1463	coroapi.save = api_save;
1071	coroapi.cede = api_cede;	1464	coroapi.cede = api_cede;
		1465	coroapi.cede_notself = api_cede_notself;
1072	coroapi.ready = api_ready;	1466	coroapi.ready = api_ready;
		1467	coroapi.is_ready = api_is_ready;
1073	coroapi.nready = &coro_nready;	1468	coroapi.nready = &coro_nready;
1074	coroapi.current = coro_current;	1469	coroapi.current = coro_current;
1075		1470
1076	GCoroAPI = &coroapi;	1471	GCoroAPI = &coroapi;
1077	sv_setiv(sv, (IV)&coroapi);	1472	sv_setiv (sv, (IV)&coroapi);
1078	SvREADONLY_on(sv);	1473	SvREADONLY_on (sv);
1079	}	1474	}
1080	}	1475	}
1081		1476
1082	#if !PERL_MICRO
1083
1084	void	1477	void
1085	ready(self)	1478	_set_current (SV *current)
1086	SV * self
1087	PROTOTYPE: $	1479	PROTOTYPE: $
1088	CODE:	1480	CODE:
1089	api_ready (self);	1481	SvREFCNT_dec (SvRV (coro_current));
1090		1482	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1091	#endif
1092		1483
1093	int	1484	int
		1485	prio (Coro::State coro, int newprio = 0)
		1486	ALIAS:
		1487	nice = 1
		1488	CODE:
		1489	{
		1490	RETVAL = coro->prio;
		1491
		1492	if (items > 1)
		1493	{
		1494	if (ix)
		1495	newprio = coro->prio - newprio;
		1496
		1497	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1498	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1499
		1500	coro->prio = newprio;
		1501	}
		1502	}
		1503	OUTPUT:
		1504	RETVAL
		1505
		1506	SV *
		1507	ready (SV *self)
		1508	PROTOTYPE: $
		1509	CODE:
		1510	RETVAL = boolSV (api_ready (self));
		1511	OUTPUT:
		1512	RETVAL
		1513
		1514	int
1094	nready(...)	1515	nready (...)
1095	PROTOTYPE:	1516	PROTOTYPE:
1096	CODE:	1517	CODE:
1097	RETVAL = coro_nready;	1518	RETVAL = coro_nready;
1098	OUTPUT:	1519	OUTPUT:
1099	RETVAL	1520	RETVAL
1100		1521
1101	void	1522	MODULE = Coro::State PACKAGE = Coro::AIO
1102	schedule(...)	1523
1103	PROTOTYPE:	1524	SV *
		1525	_get_state ()
1104	CODE:	1526	CODE:
1105	api_schedule ();
1106
1107	void
1108	cede(...)
1109	PROTOTYPE:
1110	CODE:
1111	api_cede ();
1112
1113	# and these are hacks
1114	SV *
1115	_aio_get_state ()
1116	CODE:
1117	{	1527	{
1118	struct {	1528	struct io_state *data;
1119	int errorno;
1120	int laststype;
1121	int laststatval;
1122	Stat_t statcache;
1123	} data;
1124		1529
		1530	RETVAL = newSV (sizeof (struct io_state));
		1531	data = (struct io_state *)SvPVX (RETVAL);
		1532	SvCUR_set (RETVAL, sizeof (struct io_state));
		1533	SvPOK_only (RETVAL);
		1534
1125	data.errorno = errno;	1535	data->errorno = errno;
1126	data.laststype = PL_laststype;	1536	data->laststype = PL_laststype;
1127	data.laststatval = PL_laststatval;	1537	data->laststatval = PL_laststatval;
1128	data.statcache = PL_statcache;	1538	data->statcache = PL_statcache;
1129
1130	RETVAL = newSVpvn ((char *)&data, sizeof data);
1131	}	1539	}
1132	OUTPUT:	1540	OUTPUT:
1133	RETVAL	1541	RETVAL
1134		1542
1135	void	1543	void
1136	_aio_set_state (char *data_)	1544	_set_state (char *data_)
1137	PROTOTYPE: $	1545	PROTOTYPE: $
1138	CODE:	1546	CODE:
1139	{	1547	{
1140	struct {	1548	struct io_state data = (void )data_;
1141	int errorno;
1142	int laststype;
1143	int laststatval;
1144	Stat_t statcache;
1145	} data = (void )data_;
1146		1549
1147	errno = data->errorno;	1550	errno = data->errorno;
1148	PL_laststype = data->laststype;	1551	PL_laststype = data->laststype;
1149	PL_laststatval = data->laststatval;	1552	PL_laststatval = data->laststatval;
1150	PL_statcache = data->statcache;	1553	PL_statcache = data->statcache;
1151	}	1554	}
		1555

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Comparing Coro/Coro/State.xs (file contents): Revision 1.79 by root, Thu Nov 2 12:29:08 2006 UTC vs. Revision 1.157 by root, Fri Sep 21 02:01:13 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.79 by root, Thu Nov 2 12:29:08 2006 UTC vs.
Revision 1.157 by root, Fri Sep 21 02:01:13 2007 UTC