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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.124 by root, Tue Dec 5 12:50:04 2006 UTC vs.
Revision 1.148 by root, Fri Apr 13 12:56:55 2007 UTC

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

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing Coro/Coro/State.xs (file contents): Revision 1.124 by root, Tue Dec 5 12:50:04 2006 UTC vs. Revision 1.148 by root, Fri Apr 13 12:56:55 2007 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.124 by root, Tue Dec 5 12:50:04 2006 UTC vs.
Revision 1.148 by root, Fri Apr 13 12:56:55 2007 UTC