ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.45 by root, Tue May 27 01:15:31 2003 UTC vs.
Revision 1.104 by root, Mon Nov 27 01:51:02 2006 UTC

		1	#include "libcoro/coro.c"
		2
1	#include "EXTERN.h"	3	#include "EXTERN.h"
2	#include "perl.h"	4	#include "perl.h"
3	#include "XSUB.h"	5	#include "XSUB.h"
4		6
5	#include "libcoro/coro.c"	7	#include "patchlevel.h"
6		8
		9	#if USE_VALGRIND
		10	# include <valgrind/valgrind.h>
		11	#endif
		12
		13	#define PERL_VERSION_ATLEAST(a,b,c) \
		14	(PERL_REVISION > (a) \
		15	|| (PERL_REVISION == (a) \
		16	&& (PERL_VERSION > (b) \
		17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		18
		19	#if !PERL_VERSION_ATLEAST (5,6,0)
		20	# ifndef PL_ppaddr
		21	# define PL_ppaddr ppaddr
		22	# endif
		23	# ifndef call_sv
		24	# define call_sv perl_call_sv
		25	# endif
		26	# ifndef get_sv
		27	# define get_sv perl_get_sv
		28	# endif
		29	# ifndef get_cv
		30	# define get_cv perl_get_cv
		31	# endif
		32	# ifndef IS_PADGV
		33	# define IS_PADGV(v) 0
		34	# endif
		35	# ifndef IS_PADCONST
		36	# define IS_PADCONST(v) 0
		37	# endif
		38	#endif
		39
7	#include <signal.h>	40	#include <stdio.h>
		41	#include <errno.h>
		42
		43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		44	# undef STACKGUARD
		45	#endif
		46
		47	#ifndef STACKGUARD
		48	# define STACKGUARD 0
		49	#endif
8		50
9	#ifdef HAVE_MMAP	51	#ifdef HAVE_MMAP
10	# include <unistd.h>	52	# include <unistd.h>
11	# include <sys/mman.h>	53	# include <sys/mman.h>
12	# ifndef MAP_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
…		…
14	# define MAP_ANONYMOUS MAP_ANON	56	# define MAP_ANONYMOUS MAP_ANON
15	# else	57	# else
16	# undef HAVE_MMAP	58	# undef HAVE_MMAP
17	# endif	59	# endif
18	# endif	60	# endif
		61	# include <limits.h>
		62	# ifndef PAGESIZE
		63	# define PAGESIZE pagesize
		64	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		65	static long pagesize;
		66	# else
		67	# define BOOT_PAGESIZE
19	#endif	68	# endif
20		69	#endif
21	#define MAY_FLUSH /* increases codesize and is rarely used */
22
23	#define SUB_INIT "Coro::State::initialize"
24	#define UCORO_STATE "_coro_state"
25		70
26	/* The next macro should declare a variable stacklevel that contains and approximation	71	/* The next macro should declare a variable stacklevel that contains and approximation
27	* to the current C stack pointer. Its property is that it changes with each call	72	* to the current C stack pointer. Its property is that it changes with each call
28	* and should be unique. */	73	* and should be unique. */
		74	#define dSTACKLEVEL int stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	75	#define STACKLEVEL ((void *)&stacklevel)
30		76
31	#define IN_DESTRUCT (PL_main_cv == Nullcv)	77	#define IN_DESTRUCT (PL_main_cv == Nullcv)
32		78
33	#define labs(l) ((l) >= 0 ? (l) : -(l))	79	#if __GNUC__ >= 3
		80	# define attribute(x) __attribute__(x)
		81	#else
		82	# define attribute(x)
		83	#endif
		84
		85	#define NOINLINE attribute ((noinline))
34		86
35	#include "CoroAPI.h"	87	#include "CoroAPI.h"
36		88
		89	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
		90
		91	#ifdef USE_ITHREADS
		92	static perl_mutex coro_mutex;
		93	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		94	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		95	#else
		96	# define LOCK (void)0
		97	# define UNLOCK (void)0
		98	#endif
		99
37	static struct CoroAPI coroapi;	100	static struct CoroAPI coroapi;
		101	static AV *main_mainstack; /* used to differentiate between $main and others */
		102	static HV *coro_state_stash, *coro_stash;
		103	static SV *coro_mortal; /* will be freed after next transfer */
38		104
39	/* this is actually not only the c stack but also c registers etc... */	105	/* this is a structure representing a c-level coroutine */
40	typedef struct {	106	typedef struct coro_stack {
41	int refcnt; /* pointer reference counter */	107	struct coro_stack *next;
42	int usecnt; /* shared by how many coroutines */
43	int gencnt; /* generation counter */
44		108
45	coro_context cctx;	109	/* the stack */
46
47	void *sptr;	110	void *sptr;
48	long ssize; /* positive == mmap, otherwise malloc */	111	long ssize; /* positive == mmap, otherwise malloc */
		112
		113	/* cpu state */
		114	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		115	JMPENV *top_env;
		116	coro_context cctx;
		117
		118	#if USE_VALGRIND
		119	int valgrind_id;
		120	#endif
49	} coro_stack;	121	} coro_stack;
50		122
		123	/* this is a structure representing a perl-level coroutine */
51	struct coro {	124	struct coro {
52	/* the top-level JMPENV for each coroutine, needed to catch dies. */	125	/* the c coroutine allocated to this perl coroutine, if any */
53	JMPENV start_env;
54
55	/* the optional C context */
56	coro_stack *stack;	126	coro_stack *stack;
57	void *cursp;	127
		128	/* data associated with this coroutine (initial args) */
		129	AV *args;
58	int gencnt;	130	int refcnt;
59		131
60	/* optionally saved, might be zero */	132	/* optionally saved, might be zero */
61	AV *defav;	133	AV *defav;
62	SV *defsv;	134	SV *defsv;
63	SV *errsv;	135	SV *errsv;
…		…
72	AV *mainstack;	144	AV *mainstack;
73	SV **stack_sp;	145	SV **stack_sp;
74	OP *op;	146	OP *op;
75	SV **curpad;	147	SV **curpad;
76	AV *comppad;	148	AV *comppad;
		149	CV *compcv;
77	SV **stack_base;	150	SV **stack_base;
78	SV **stack_max;	151	SV **stack_max;
79	SV **tmps_stack;	152	SV **tmps_stack;
80	I32 tmps_floor;	153	I32 tmps_floor;
81	I32 tmps_ix;	154	I32 tmps_ix;
…		…
90	I32 savestack_ix;	163	I32 savestack_ix;
91	I32 savestack_max;	164	I32 savestack_max;
92	OP **retstack;	165	OP **retstack;
93	I32 retstack_ix;	166	I32 retstack_ix;
94	I32 retstack_max;	167	I32 retstack_max;
		168	PMOP *curpm;
95	COP *curcop;	169	COP *curcop;
96	JMPENV *top_env;
97		170
98	/* data associated with this coroutine (initial args) */	171	/* coro process data */
99	AV *args;	172	int prio;
100	};	173	};
101		174
102	typedef struct coro *Coro__State;	175	typedef struct coro *Coro__State;
103	typedef struct coro *Coro__State_or_hashref;	176	typedef struct coro *Coro__State_or_hashref;
104		177
105	static AV *main_mainstack; /* used to differentiate between $main and others */	178	static AV *
106	static HV *coro_state_stash;	179	coro_clone_padlist (CV *cv)
107	static SV *ucoro_state_sv;
108	static U32 ucoro_state_hash;
109	static HV *padlist_cache;
110	static SV *coro_mortal; /* will be freed after next transfer */
111
112	/* mostly copied from op.c:cv_clone2 */
113	STATIC AV *
114	clone_padlist (AV *protopadlist)
115	{	180	{
116	AV *av;	181	AV *padlist = CvPADLIST (cv);
117	I32 ix;
118	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
119	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
120	SV **pname = AvARRAY (protopad_name);
121	SV **ppad = AvARRAY (protopad);
122	I32 fname = AvFILLp (protopad_name);
123	I32 fpad = AvFILLp (protopad);
124	AV *newpadlist, *newpad_name, *newpad;	182	AV *newpadlist, *newpad;
125	SV **npad;
126
127	newpad_name = newAV ();
128	for (ix = fname; ix >= 0; ix--)
129	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
130
131	newpad = newAV ();
132	av_fill (newpad, AvFILLp (protopad));
133	npad = AvARRAY (newpad);
134		183
135	newpadlist = newAV ();	184	newpadlist = newAV ();
136	AvREAL_off (newpadlist);	185	AvREAL_off (newpadlist);
137	av_store (newpadlist, 0, (SV *) newpad_name);	186	#if PERL_VERSION_ATLEAST (5,9,0)
		187	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		188	#else
		189	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		190	#endif
		191	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		192	--AvFILLp (padlist);
		193
		194	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
138	av_store (newpadlist, 1, (SV *) newpad);	195	av_store (newpadlist, 1, (SV *)newpad);
139		196
140	av = newAV (); /* will be @_ */	197	return newpadlist;
141	av_extend (av, 0);	198	}
142	av_store (newpad, 0, (SV *) av);
143	AvFLAGS (av) = AVf_REIFY;
144		199
145	for (ix = fpad; ix > 0; ix--)	200	static void
		201	free_padlist (AV *padlist)
		202	{
		203	/* may be during global destruction */
		204	if (SvREFCNT (padlist))
146	{	205	{
147	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	206	I32 i = AvFILLp (padlist);
148	if (namesv && namesv != &PL_sv_undef)	207	while (i >= 0)
149	{	208	{
150	char *name = SvPVX (namesv); /* XXX */	209	SV **svp = av_fetch (padlist, i--, FALSE);
151	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	210	if (svp)
152	{ /* lexical from outside? */
153	npad[ix] = SvREFCNT_inc (ppad[ix]);
154	}	211	{
155	else
156	{ /* our own lexical */
157	SV *sv;	212	SV *sv;
158	if (*name == '&')	213	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
159	sv = SvREFCNT_inc (ppad[ix]);	214	SvREFCNT_dec (sv);
160	else if (*name == '@')	215
161	sv = (SV *) newAV ();	216	SvREFCNT_dec (*svp);
162	else if (*name == '%')
163	sv = (SV *) newHV ();
164	else
165	sv = NEWSV (0, 0);
166	if (!SvPADBUSY (sv))
167	SvPADMY_on (sv);
168	npad[ix] = sv;
169	}	217	}
170	}	218	}
171	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	219
172	{	220	SvREFCNT_dec ((SV*)padlist);
173	npad[ix] = SvREFCNT_inc (ppad[ix]);
174	}
175	else
176	{
177	SV *sv = NEWSV (0, 0);
178	SvPADTMP_on (sv);
179	npad[ix] = sv;
180	}
181	}	221	}
		222	}
182		223
183	#if 0 /* return -ENOTUNDERSTOOD */	224	static int
184	/* Now that vars are all in place, clone nested closures. */	225	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		226	{
		227	AV *padlist;
		228	AV *av = (AV *)mg->mg_obj;
185		229
186	for (ix = fpad; ix > 0; ix--) {	230	/* casting is fun. */
187	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	231	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
188	if (namesv	232	free_padlist (padlist);
189	&& namesv != &PL_sv_undef	233
190	&& !(SvFLAGS(namesv) & SVf_FAKE)	234	SvREFCNT_dec (av);
191	&& *SvPVX(namesv) == '&'	235
192	&& CvCLONE(ppad[ix]))	236	return 0;
193	{	237	}
194	CV *kid = cv_clone((CV*)ppad[ix]);	238
195	SvREFCNT_dec(ppad[ix]);	239	#define PERL_MAGIC_coro PERL_MAGIC_ext
196	CvCLONE_on(kid);	240
197	SvPADMY_on(kid);	241	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
198	npad[ix] = (SV*)kid;	242
199	}	243	/* the next two functions merely cache the padlists */
		244	static void
		245	get_padlist (CV *cv)
		246	{
		247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		248
		249	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
		250	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
		251	else
		252	{
		253	#if 0
		254	/* this is probably cleaner, but also slower? */
		255	CV *cp = Perl_cv_clone (cv);
		256	CvPADLIST (cv) = CvPADLIST (cp);
		257	CvPADLIST (cp) = 0;
		258	SvREFCNT_dec (cp);
		259	#else
		260	CvPADLIST (cv) = coro_clone_padlist (cv);
		261	#endif
		262	}
		263	}
		264
		265	static void
		266	put_padlist (CV *cv)
		267	{
		268	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		269
		270	if (!mg)
		271	{
		272	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		273	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		274	mg->mg_virtual = &vtbl_coro;
		275	mg->mg_obj = (SV *)newAV ();
200	}	276	}
201	#endif
202		277
203	return newpadlist;
204	}
205
206	#ifdef MAY_FLUSH
207	STATIC void
208	free_padlist (AV *padlist)
209	{
210	/* may be during global destruction */
211	if (SvREFCNT(padlist))
212	{
213	I32 i = AvFILLp(padlist);
214	while (i >= 0)
215	{
216	SV **svp = av_fetch(padlist, i--, FALSE);
217	SV *sv = svp ? *svp : Nullsv;
218	if (sv)
219	SvREFCNT_dec(sv);
220	}
221
222	SvREFCNT_dec((SV*)padlist);
223	}
224	}
225	#endif
226
227	/* the next two functions merely cache the padlists */
228	STATIC void
229	get_padlist (CV *cv)
230	{
231	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
232
233	if (he && AvFILLp ((AV *)*he) >= 0)
234	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
235	else
236	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
237	}
238
239	STATIC void
240	put_padlist (CV *cv)
241	{
242	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
243
244	if (SvTYPE (*he) != SVt_PVAV)
245	{
246	SvREFCNT_dec (*he);
247	*he = (SV *)newAV ();
248	}
249
250	av_push ((AV *)*he, (SV *)CvPADLIST (cv));	278	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
251	}	279	}
252
253	#ifdef MAY_FLUSH
254	STATIC void
255	flush_padlist_cache ()
256	{
257	HV *hv = padlist_cache;
258	padlist_cache = newHV ();
259
260	if (hv_iterinit (hv))
261	{
262	HE *he;
263	AV *padlist;
264
265	while (!!(he = hv_iternext (hv)))
266	{
267	AV *av = (AV *)HeVAL(he);
268
269	/* casting is fun. */
270	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
271	free_padlist (padlist);
272	}
273	}
274
275	SvREFCNT_dec (hv);
276	}
277	#endif
278		280
279	#define SB do {	281	#define SB do {
280	#define SE } while (0)	282	#define SE } while (0)
281		283
282	#define LOAD(state) load_state(aTHX_ (state));	284	#define LOAD(state) load_state((state));
283	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	285	#define SAVE(state,flags) save_state((state),(flags));
284		286
285	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	287	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
286		288
287	static void	289	static void
288	load_state(pTHX_ Coro__State c)	290	load_state(Coro__State c)
289	{	291	{
290	PL_dowarn = c->dowarn;	292	PL_dowarn = c->dowarn;
291	PL_in_eval = c->in_eval;	293	PL_in_eval = c->in_eval;
292		294
293	PL_curstackinfo = c->curstackinfo;	295	PL_curstackinfo = c->curstackinfo;
…		…
295	PL_mainstack = c->mainstack;	297	PL_mainstack = c->mainstack;
296	PL_stack_sp = c->stack_sp;	298	PL_stack_sp = c->stack_sp;
297	PL_op = c->op;	299	PL_op = c->op;
298	PL_curpad = c->curpad;	300	PL_curpad = c->curpad;
299	PL_comppad = c->comppad;	301	PL_comppad = c->comppad;
		302	PL_compcv = c->compcv;
300	PL_stack_base = c->stack_base;	303	PL_stack_base = c->stack_base;
301	PL_stack_max = c->stack_max;	304	PL_stack_max = c->stack_max;
302	PL_tmps_stack = c->tmps_stack;	305	PL_tmps_stack = c->tmps_stack;
303	PL_tmps_floor = c->tmps_floor;	306	PL_tmps_floor = c->tmps_floor;
304	PL_tmps_ix = c->tmps_ix;	307	PL_tmps_ix = c->tmps_ix;
…		…
310	PL_scopestack_ix = c->scopestack_ix;	313	PL_scopestack_ix = c->scopestack_ix;
311	PL_scopestack_max = c->scopestack_max;	314	PL_scopestack_max = c->scopestack_max;
312	PL_savestack = c->savestack;	315	PL_savestack = c->savestack;
313	PL_savestack_ix = c->savestack_ix;	316	PL_savestack_ix = c->savestack_ix;
314	PL_savestack_max = c->savestack_max;	317	PL_savestack_max = c->savestack_max;
		318	#if !PERL_VERSION_ATLEAST (5,9,0)
315	PL_retstack = c->retstack;	319	PL_retstack = c->retstack;
316	PL_retstack_ix = c->retstack_ix;	320	PL_retstack_ix = c->retstack_ix;
317	PL_retstack_max = c->retstack_max;	321	PL_retstack_max = c->retstack_max;
		322	#endif
		323	PL_curpm = c->curpm;
318	PL_curcop = c->curcop;	324	PL_curcop = c->curcop;
319	PL_top_env = c->top_env;
320		325
321	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	326	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
322	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	327	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
323	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	328	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
324		329
…		…
333		338
334	if (padlist)	339	if (padlist)
335	{	340	{
336	put_padlist (cv); /* mark this padlist as available */	341	put_padlist (cv); /* mark this padlist as available */
337	CvPADLIST(cv) = padlist;	342	CvPADLIST(cv) = padlist;
338	#ifdef USE_THREADS
339	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
340	#endif
341	}	343	}
342		344
343	++CvDEPTH(cv);	345	++CvDEPTH(cv);
344	}	346	}
345		347
346	PUTBACK;	348	PUTBACK;
347	}	349	}
348	}	350	}
349		351
350	static void	352	static void
351	save_state(pTHX_ Coro__State c, int flags)	353	save_state(Coro__State c, int flags)
352	{	354	{
353	{	355	{
354	dSP;	356	dSP;
355	I32 cxix = cxstack_ix;	357	I32 cxix = cxstack_ix;
356	PERL_CONTEXT *ccstk = cxstack;	358	PERL_CONTEXT *ccstk = cxstack;
…		…
372	if (CxTYPE(cx) == CXt_SUB)	374	if (CxTYPE(cx) == CXt_SUB)
373	{	375	{
374	CV *cv = cx->blk_sub.cv;	376	CV *cv = cx->blk_sub.cv;
375	if (CvDEPTH(cv))	377	if (CvDEPTH(cv))
376	{	378	{
377	#ifdef USE_THREADS
378	/*XPUSHs ((SV *)CvOWNER(cv));*/
379	/*CvOWNER(cv) = 0;*/
380	/*error must unlock this cv etc.. etc...*/
381	#endif
382	EXTEND (SP, CvDEPTH(cv)*2);	379	EXTEND (SP, CvDEPTH(cv)*2);
383		380
384	while (--CvDEPTH(cv))	381	while (--CvDEPTH(cv))
385	{	382	{
386	/* this tells the restore code to increment CvDEPTH */	383	/* this tells the restore code to increment CvDEPTH */
…		…
389	}	386	}
390		387
391	PUSHs ((SV *)CvPADLIST(cv));	388	PUSHs ((SV *)CvPADLIST(cv));
392	PUSHs ((SV *)cv);	389	PUSHs ((SV *)cv);
393		390
394	get_padlist (cv); /* this is a monster */	391	get_padlist (cv);
395	}	392	}
396	}	393	}
		394	#ifdef CXt_FORMAT
397	else if (CxTYPE(cx) == CXt_FORMAT)	395	else if (CxTYPE(cx) == CXt_FORMAT)
398	{	396	{
399	/* I never used formats, so how should I know how these are implemented? */	397	/* I never used formats, so how should I know how these are implemented? */
400	/* my bold guess is as a simple, plain sub... */	398	/* my bold guess is as a simple, plain sub... */
401	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	399	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
402	}	400	}
		401	#endif
403	}	402	}
404		403
405	if (top_si->si_type == PERLSI_MAIN)	404	if (top_si->si_type == PERLSI_MAIN)
406	break;	405	break;
407		406
…		…
425	c->mainstack = PL_mainstack;	424	c->mainstack = PL_mainstack;
426	c->stack_sp = PL_stack_sp;	425	c->stack_sp = PL_stack_sp;
427	c->op = PL_op;	426	c->op = PL_op;
428	c->curpad = PL_curpad;	427	c->curpad = PL_curpad;
429	c->comppad = PL_comppad;	428	c->comppad = PL_comppad;
		429	c->compcv = PL_compcv;
430	c->stack_base = PL_stack_base;	430	c->stack_base = PL_stack_base;
431	c->stack_max = PL_stack_max;	431	c->stack_max = PL_stack_max;
432	c->tmps_stack = PL_tmps_stack;	432	c->tmps_stack = PL_tmps_stack;
433	c->tmps_floor = PL_tmps_floor;	433	c->tmps_floor = PL_tmps_floor;
434	c->tmps_ix = PL_tmps_ix;	434	c->tmps_ix = PL_tmps_ix;
…		…
440	c->scopestack_ix = PL_scopestack_ix;	440	c->scopestack_ix = PL_scopestack_ix;
441	c->scopestack_max = PL_scopestack_max;	441	c->scopestack_max = PL_scopestack_max;
442	c->savestack = PL_savestack;	442	c->savestack = PL_savestack;
443	c->savestack_ix = PL_savestack_ix;	443	c->savestack_ix = PL_savestack_ix;
444	c->savestack_max = PL_savestack_max;	444	c->savestack_max = PL_savestack_max;
		445	#if !PERL_VERSION_ATLEAST (5,9,0)
445	c->retstack = PL_retstack;	446	c->retstack = PL_retstack;
446	c->retstack_ix = PL_retstack_ix;	447	c->retstack_ix = PL_retstack_ix;
447	c->retstack_max = PL_retstack_max;	448	c->retstack_max = PL_retstack_max;
		449	#endif
		450	c->curpm = PL_curpm;
448	c->curcop = PL_curcop;	451	c->curcop = PL_curcop;
449	c->top_env = PL_top_env;
450	}	452	}
451		453
452	/*	454	/*
453	* allocate various perl stacks. This is an exact copy	455	* allocate various perl stacks. This is an exact copy
454	* of perl.c:init_stacks, except that it uses less memory	456	* of perl.c:init_stacks, except that it uses less memory
455	* on the assumption that coroutines do not usually need	457	* on the (sometimes correct) assumption that coroutines do
456	* a lot of stackspace.	458	* not usually need a lot of stackspace.
457	*/	459	*/
458	STATIC void	460	static void
459	coro_init_stacks (pTHX)	461	coro_init_stacks ()
460	{	462	{
461	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	463	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
462	PL_curstackinfo->si_type = PERLSI_MAIN;	464	PL_curstackinfo->si_type = PERLSI_MAIN;
463	PL_curstack = PL_curstackinfo->si_stack;	465	PL_curstack = PL_curstackinfo->si_stack;
464	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	466	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
474		476
475	New(54,PL_markstack,16,I32);	477	New(54,PL_markstack,16,I32);
476	PL_markstack_ptr = PL_markstack;	478	PL_markstack_ptr = PL_markstack;
477	PL_markstack_max = PL_markstack + 16;	479	PL_markstack_max = PL_markstack + 16;
478		480
		481	#ifdef SET_MARK_OFFSET
479	SET_MARK_OFFSET;	482	SET_MARK_OFFSET;
		483	#endif
480		484
481	New(54,PL_scopestack,16,I32);	485	New(54,PL_scopestack,16,I32);
482	PL_scopestack_ix = 0;	486	PL_scopestack_ix = 0;
483	PL_scopestack_max = 16;	487	PL_scopestack_max = 16;
484		488
485	New(54,PL_savestack,96,ANY);	489	New(54,PL_savestack,96,ANY);
486	PL_savestack_ix = 0;	490	PL_savestack_ix = 0;
487	PL_savestack_max = 96;	491	PL_savestack_max = 96;
488		492
		493	#if !PERL_VERSION_ATLEAST (5,9,0)
489	New(54,PL_retstack,8,OP*);	494	New(54,PL_retstack,8,OP*);
490	PL_retstack_ix = 0;	495	PL_retstack_ix = 0;
491	PL_retstack_max = 8;	496	PL_retstack_max = 8;
		497	#endif
492	}	498	}
493		499
494	/*	500	/*
495	* destroy the stacks, the callchain etc...	501	* destroy the stacks, the callchain etc...
496	* still there is a memleak of 128 bytes...
497	*/	502	*/
498	STATIC void	503	static void
499	destroy_stacks(pTHX)	504	coro_destroy_stacks()
500	{	505	{
501	if (!IN_DESTRUCT)	506	if (!IN_DESTRUCT)
502	{	507	{
503	/* is this ugly, I ask? */	508	/* is this ugly, I ask? */
504	while (PL_scopestack_ix)	509	LEAVE_SCOPE (0);
505	LEAVE;
506		510
507	/* sure it is, but more important: is it correct?? :/ */	511	/* sure it is, but more important: is it correct?? :/ */
508	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
509	FREETMPS;	512	FREETMPS;
		513
		514	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
510	}	515	}
511		516
512	while (PL_curstackinfo->si_next)	517	while (PL_curstackinfo->si_next)
513	PL_curstackinfo = PL_curstackinfo->si_next;	518	PL_curstackinfo = PL_curstackinfo->si_next;
514		519
515	while (PL_curstackinfo)	520	while (PL_curstackinfo)
516	{	521	{
517	PERL_SI *p = PL_curstackinfo->si_prev;	522	PERL_SI *p = PL_curstackinfo->si_prev;
518		523
519	{	524	{ /*D*//*remove*/
520	dSP;	525	dSP;
521	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	526	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
522	PUTBACK; /* possibly superfluous */	527	PUTBACK; /* possibly superfluous */
523	}	528	}
524		529
525	if (!IN_DESTRUCT)	530	if (!IN_DESTRUCT)
526	{	531	{
527	dounwind(-1);	532	dounwind (-1);/*D*//*remove*/
528	SvREFCNT_dec(PL_curstackinfo->si_stack);	533	SvREFCNT_dec (PL_curstackinfo->si_stack);
529	}	534	}
530		535
531	Safefree(PL_curstackinfo->si_cxstack);	536	Safefree (PL_curstackinfo->si_cxstack);
532	Safefree(PL_curstackinfo);	537	Safefree (PL_curstackinfo);
533	PL_curstackinfo = p;	538	PL_curstackinfo = p;
534	}	539	}
535		540
536	Safefree(PL_tmps_stack);	541	Safefree (PL_tmps_stack);
537	Safefree(PL_markstack);	542	Safefree (PL_markstack);
538	Safefree(PL_scopestack);	543	Safefree (PL_scopestack);
539	Safefree(PL_savestack);	544	Safefree (PL_savestack);
		545	#if !PERL_VERSION_ATLEAST (5,9,0)
540	Safefree(PL_retstack);	546	Safefree (PL_retstack);
541	}
542
543	static void
544	allocate_stack (Coro__State ctx, int alloc)
545	{
546	coro_stack *stack;
547
548	New (0, stack, 1, coro_stack);
549
550	stack->refcnt = 1;
551	stack->usecnt = 1;
552	stack->gencnt = ctx->gencnt = 0;
553	if (alloc)
554	{
555	#if HAVE_MMAP
556	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
557	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
558	if (stack->sptr == (void *)-1)
559	#endif	547	#endif
560	{
561	/*FIXME*//*D*//* reasonable stack size! */
562	stack->ssize = -4096 * sizeof (long);
563	New (0, stack->sptr, 4096, long);
564	}
565	}
566	else
567	stack->sptr = 0;
568
569	ctx->stack = stack;
570	}	548	}
571		549
572	static void	550	static void
573	deallocate_stack (Coro__State ctx)	551	setup_coro (struct coro *coro)
574	{
575	coro_stack *stack = ctx->stack;
576
577	ctx->stack = 0;
578
579	if (stack)
580	{
581	if (!--stack->refcnt)
582	{
583	#ifdef HAVE_MMAP
584	if (stack->ssize > 0 && stack->sptr)
585	munmap (stack->sptr, stack->ssize);
586	else
587	#else
588	Safefree (stack->sptr);
589	#endif
590	Safefree (stack);
591	}
592	else if (ctx->gencnt == stack->gencnt)
593	--stack->usecnt;
594	}
595	}
596
597	static void
598	setup_coro (void *arg)
599	{	552	{
600	/*	553	/*
601	* emulate part of the perl startup here.	554	* emulate part of the perl startup here.
602	*/	555	*/
603	dSP;
604	Coro__State ctx = (Coro__State)arg;
605	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
606		556
607	coro_init_stacks (aTHX);	557	coro_init_stacks ();
		558
608	/*PL_curcop = 0;*/	559	PL_curcop = 0;
609	/*PL_in_eval = PL_in_eval;*/ /* inherit */	560	PL_in_eval = 0;
		561	PL_curpm = 0;
		562
		563	{
		564	dSP;
		565	LOGOP myop;
		566
		567	/* I have no idea why this is needed, but it is */
		568	PUSHMARK (SP);
		569
610	SvREFCNT_dec (GvAV (PL_defgv));	570	SvREFCNT_dec (GvAV (PL_defgv));
611	GvAV (PL_defgv) = ctx->args;	571	GvAV (PL_defgv) = coro->args; coro->args = 0;
612		572
613	SPAGAIN;
614
615	if (ctx->stack)
616	{
617	ctx->cursp = 0;
618
619	PUSHMARK(SP);
620	PUTBACK;
621	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
622
623	if (SvTRUE (ERRSV))
624	croak (NULL);
625	else
626	croak ("FATAL: CCTXT coroutine returned!");
627	}
628	else
629	{
630	UNOP myop;
631
632	PL_op = (OP *)&myop;
633
634	Zero(&myop, 1, UNOP);	573	Zero (&myop, 1, LOGOP);
635	myop.op_next = Nullop;	574	myop.op_next = Nullop;
636	myop.op_flags = OPf_WANT_VOID;	575	myop.op_flags = OPf_WANT_VOID;
637		576
		577	PL_op = (OP *)&myop;
		578
638	PUSHMARK(SP);	579	PUSHMARK (SP);
639	XPUSHs (sub_init);	580	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
640	/*
641	* the next line is slightly wrong, as PL_op->op_next
642	* is actually being executed so we skip the first op.
643	* that doesn't matter, though, since it is only
644	* pp_nextstate and we never return...
645	* ah yes, and I don't care anyways ;)
646	*/
647	PUTBACK;	581	PUTBACK;
648	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	582	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
649	SPAGAIN;	583	SPAGAIN;
650		584
651	ENTER; /* necessary e.g. for dounwind */	585	ENTER; /* necessary e.g. for dounwind */
652	}	586	}
653	}	587	}
654		588
655	static void	589	static void
656	continue_coro (void *arg)	590	free_coro_mortal ()
657	{	591	{
658	/*
659	* this is a _very_ stripped down perl interpreter ;)
660	*/
661	Coro__State ctx = (Coro__State)arg;
662	JMPENV coro_start_env;
663
664	PL_top_env = &ctx->start_env;
665
666	ctx->cursp = 0;
667	PL_op = PL_op->op_next;
668	CALLRUNOPS(aTHX);
669
670	abort ();
671	}
672
673	STATIC void
674	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
675	{
676	dSTACKLEVEL;
677	static struct coro *xnext;
678
679	if (prev != next)
680	{
681	xnext = next;
682
683	if (next->mainstack)
684	{
685	SAVE (prev, flags);
686	LOAD (next);
687
688	/* mark this state as in-use */
689	next->mainstack = 0;
690	next->tmps_ix = -2;
691
692	/* stacklevel changed? if yes, grab the stack for us! */
693	if (flags & TRANSFER_SAVE_CCTXT)
694	{
695	if (!prev->stack)
696	allocate_stack (prev, 0);
697	else if (prev->cursp != stacklevel
698	&& prev->stack->usecnt > 1)
699	{
700	prev->gencnt = ++prev->stack->gencnt;
701	prev->stack->usecnt = 1;
702	}
703
704	/* has our stack been invalidated? */
705	if (next->stack && next->stack->gencnt != next->gencnt)
706	{
707	deallocate_stack (next);
708	allocate_stack (next, 1);
709	coro_create (&(next->stack->cctx),
710	continue_coro, (void *)next,
711	next->stack->sptr, labs (next->stack->ssize));
712	}
713
714	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715	/* don't add any code here */
716	}
717
718	}
719	else if (next->tmps_ix == -2)
720	croak ("tried to transfer to running coroutine");
721	else
722	{
723	SAVE (prev, -1); /* first get rid of the old state */
724
725	if (flags & TRANSFER_SAVE_CCTXT)
726	{
727	if (!prev->stack)
728	allocate_stack (prev, 0);
729
730	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
731	{
732	PL_top_env = &next->start_env;
733
734	setup_coro (next);
735
736	prev->stack->refcnt++;
737	prev->stack->usecnt++;
738	next->stack = prev->stack;
739	next->gencnt = prev->gencnt;
740	}
741	else
742	{
743	allocate_stack (next, 1);
744	coro_create (&(next->stack->cctx),
745	setup_coro, (void *)next,
746	next->stack->sptr, labs (next->stack->ssize));
747	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
748	/* don't add any code here */
749	}
750	}
751	else
752	setup_coro (next);
753	}
754
755	/*
756	* xnext is now either prev or next, depending on wether
757	* we switched the c stack or not. that's why I use a global
758	* variable, that should become thread-specific at one point.
759	*/
760	xnext->cursp = stacklevel;
761	}
762
763	if (coro_mortal)	592	if (coro_mortal)
764	{	593	{
765	SvREFCNT_dec (coro_mortal);	594	SvREFCNT_dec (coro_mortal);
766	coro_mortal = 0;	595	coro_mortal = 0;
767	}	596	}
768	}	597	}
769		598
770	#define SV_CORO(sv,func) \	599	static void NOINLINE
771	do { \	600	prepare_cctx (coro_stack *cctx)
772	if (SvROK (sv)) \	601	{
773	sv = SvRV (sv); \	602	dSP;
774	\	603	LOGOP myop;
775	if (SvTYPE(sv) == SVt_PVHV) \
776	{ \
777	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
778	\
779	if (!he) \
780	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
781	\
782	(sv) = SvRV (HeVAL(he)); \
783	} \
784	\
785	/* must also be changed inside Coro::Cont::yield */ \
786	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
787	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
788	\
789	} while(0)
790		604
791	#define SvSTATE(sv) (struct coro *)SvIV (sv)	605	Zero (&myop, 1, LOGOP);
		606	myop.op_next = PL_op;
		607	myop.op_flags = OPf_WANT_VOID;
792		608
		609	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
		610
		611	PUSHMARK (SP);
		612	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
		613	PUTBACK;
		614	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		615	SPAGAIN;
		616	}
		617
		618	static void
		619	coro_run (void *arg)
		620	{
		621	/* coro_run is the alternative epilogue of transfer() */
		622	UNLOCK;
		623
		624	/*
		625	* this is a _very_ stripped down perl interpreter ;)
		626	*/
		627	PL_top_env = &PL_start_env;
		628	/* inject call to cctx_init */
		629	prepare_cctx ((coro_stack *)arg);
		630
		631	/* somebody will hit me for both perl_run and PL_restartop */
		632	perl_run (PL_curinterp);
		633
		634	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
		635	abort ();
		636	}
		637
		638	static coro_stack *
		639	stack_new ()
		640	{
		641	coro_stack *stack;
		642
		643	New (0, stack, 1, coro_stack);
		644
		645	#if HAVE_MMAP
		646
		647	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		648	/* mmap suppsedly does allocate-on-write for us */
		649	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		650
		651	if (stack->sptr == (void *)-1)
		652	{
		653	perror ("FATAL: unable to mmap stack for coroutine");
		654	_exit (EXIT_FAILURE);
		655	}
		656
		657	# if STACKGUARD
		658	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		659	# endif
		660
		661	#else
		662
		663	stack->ssize = STACKSIZE * (long)sizeof (long);
		664	New (0, stack->sptr, STACKSIZE, long);
		665
		666	if (!stack->sptr)
		667	{
		668	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		669	_exit (EXIT_FAILURE);
		670	}
		671
		672	#endif
		673
		674	#if USE_VALGRIND
		675	stack->valgrind_id = VALGRIND_STACK_REGISTER (
		676	STACKGUARD * PAGESIZE + (char *)stack->sptr,
		677	stack->ssize + (char *)stack->sptr
		678	);
		679	#endif
		680
		681	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		682
		683	return stack;
		684	}
		685
		686	static void
		687	stack_free (coro_stack *stack)
		688	{
		689	if (!stack)
		690	return;
		691
		692	#if USE_VALGRIND
		693	VALGRIND_STACK_DEREGISTER (stack->valgrind_id);
		694	#endif
		695
		696	#if HAVE_MMAP
		697	munmap (stack->sptr, stack->ssize);
		698	#else
		699	Safefree (stack->sptr);
		700	#endif
		701
		702	Safefree (stack);
		703	}
		704
		705	static coro_stack *stack_first;
		706	static int cctx_count, cctx_idle;
		707
		708	static coro_stack *
		709	stack_get ()
		710	{
		711	coro_stack *stack;
		712
		713	if (stack_first)
		714	{
		715	--cctx_idle;
		716	stack = stack_first;
		717	stack_first = stack->next;
		718	}
		719	else
		720	{
		721	++cctx_count;
		722	stack = stack_new ();
		723	PL_op = PL_op->op_next;
		724	}
		725
		726	return stack;
		727	}
		728
		729	static void
		730	stack_put (coro_stack *stack)
		731	{
		732	++cctx_idle;
		733	stack->next = stack_first;
		734	stack_first = stack;
		735	}
		736
		737	/* never call directly, always through the coro_state_transfer global variable */
		738	static void NOINLINE
		739	transfer (struct coro *prev, struct coro *next, int flags)
		740	{
		741	dSTACKLEVEL;
		742
		743	/* sometimes transfer is only called to set idle_sp */
		744	if (flags == TRANSFER_SET_STACKLEVEL)
		745	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		746	else if (prev != next)
		747	{
		748	coro_stack *prev__stack;
		749
		750	LOCK;
		751
		752	if (next->mainstack)
		753	{
		754	/* coroutine already started */
		755	SAVE (prev, flags);
		756	LOAD (next);
		757	}
		758	else
		759	{
		760	/* need to start coroutine */
		761	/* first get rid of the old state */
		762	SAVE (prev, -1);
		763	/* setup coroutine call */
		764	setup_coro (next);
		765	/* need a stack */
		766	next->stack = 0;
		767	}
		768
		769	if (!prev->stack)
		770	/* create a new empty context */
		771	Newz (0, prev->stack, 1, coro_stack);
		772
		773	prev__stack = prev->stack;
		774
		775	/* possibly "free" the stack */
		776	if (prev__stack->idle_sp == STACKLEVEL)
		777	{
		778	stack_put (prev__stack);
		779	prev->stack = 0;
		780	}
		781
		782	if (!next->stack)
		783	next->stack = stack_get ();
		784
		785	if (prev__stack != next->stack)
		786	{
		787	prev__stack->top_env = PL_top_env;
		788	PL_top_env = next->stack->top_env;
		789	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		790	}
		791
		792	free_coro_mortal ();
		793
		794	UNLOCK;
		795	}
		796	}
		797
		798	struct transfer_args
		799	{
		800	struct coro *prev, *next;
		801	int flags;
		802	};
		803
		804	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		805
		806	static void
		807	coro_state_destroy (struct coro *coro)
		808	{
		809	if (coro->refcnt--)
		810	return;
		811
		812	if (coro->mainstack && coro->mainstack != main_mainstack)
		813	{
		814	struct coro temp;
		815
		816	SAVE ((&temp), TRANSFER_SAVE_ALL);
		817	LOAD (coro);
		818
		819	coro_destroy_stacks ();
		820
		821	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		822
		823	coro->mainstack = 0;
		824	}
		825
		826	stack_free (coro->stack);
		827	SvREFCNT_dec (coro->args);
		828	Safefree (coro);
		829	}
		830
793	static void	831	static int
		832	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		833	{
		834	struct coro *coro = (struct coro *)mg->mg_ptr;
		835	mg->mg_ptr = 0;
		836
		837	coro_state_destroy (coro);
		838
		839	return 0;
		840	}
		841
		842	static int
		843	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		844	{
		845	struct coro *coro = (struct coro *)mg->mg_ptr;
		846
		847	++coro->refcnt;
		848
		849	return 0;
		850	}
		851
		852	static MGVTBL coro_state_vtbl = {
		853	0, 0, 0, 0,
		854	coro_state_clear,
		855	0,
		856	#ifdef MGf_DUP
		857	coro_state_dup,
		858	#else
		859	# define MGf_DUP 0
		860	#endif
		861	};
		862
		863	static struct coro *
		864	SvSTATE (SV *coro)
		865	{
		866	HV *stash;
		867	MAGIC *mg;
		868
		869	if (SvROK (coro))
		870	coro = SvRV (coro);
		871
		872	stash = SvSTASH (coro);
		873	if (stash != coro_stash && stash != coro_state_stash)
		874	{
		875	/* very slow, but rare, check */
		876	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		877	croak ("Coro::State object required");
		878	}
		879
		880	mg = SvMAGIC (coro);
		881	assert (mg->mg_type == PERL_MAGIC_ext);
		882	return (struct coro *)mg->mg_ptr;
		883	}
		884
		885	static void
		886	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		887	{
		888	ta->prev = SvSTATE (prev);
		889	ta->next = SvSTATE (next);
		890	ta->flags = flags;
		891	}
		892
		893	static void
794	api_transfer(pTHX_ SV *prev, SV *next, int flags)	894	api_transfer (SV *prev, SV *next, int flags)
795	{	895	{
796	SV_CORO (prev, "Coro::transfer");	896	dTHX;
797	SV_CORO (next, "Coro::transfer");	897	struct transfer_args ta;
798		898
799	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	899	prepare_transfer (&ta, prev, next, flags);
		900	TRANSFER (ta);
800	}	901	}
801		902
802	/** Coro ********************************************************************/	903	/** Coro ********************************************************************/
803		904
804	#define PRIO_MAX 3	905	#define PRIO_MAX 3
…		…
808	#define PRIO_IDLE -3	909	#define PRIO_IDLE -3
809	#define PRIO_MIN -4	910	#define PRIO_MIN -4
810		911
811	/* for Coro.pm */	912	/* for Coro.pm */
812	static GV *coro_current, *coro_idle;	913	static GV *coro_current, *coro_idle;
813	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	914	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
814	static int coro_nready;	915	static int coro_nready;
815		916
816	static void	917	static void
817	coro_enq (SV *sv)	918	coro_enq (SV *sv)
818	{	919	{
		920	int prio;
		921
819	if (SvTYPE (sv) == SVt_PVHV)	922	if (SvTYPE (sv) != SVt_PVHV)
820	{
821	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
822	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
823
824	prio = prio > PRIO_MAX ? PRIO_MAX
825	: prio < PRIO_MIN ? PRIO_MIN
826	: prio;
827
828	av_push (coro_ready [prio - PRIO_MIN], sv);
829	coro_nready++;
830
831	return;
832	}
833
834	croak ("Coro::ready tried to enqueue something that is not a coroutine");	923	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		924
		925	prio = SvSTATE (sv)->prio;
		926
		927	av_push (coro_ready [prio - PRIO_MIN], sv);
		928	coro_nready++;
835	}	929	}
836		930
837	static SV *	931	static SV *
838	coro_deq (int min_prio)	932	coro_deq (int min_prio)
839	{	933	{
…		…
842	min_prio -= PRIO_MIN;	936	min_prio -= PRIO_MIN;
843	if (min_prio < 0)	937	if (min_prio < 0)
844	min_prio = 0;	938	min_prio = 0;
845		939
846	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	940	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
847	if (av_len (coro_ready[prio]) >= 0)	941	if (AvFILLp (coro_ready [prio]) >= 0)
848	{	942	{
849	coro_nready--;	943	coro_nready--;
850	return av_shift (coro_ready[prio]);	944	return av_shift (coro_ready [prio]);
851	}	945	}
852		946
853	return 0;	947	return 0;
854	}	948	}
855		949
856	static void	950	static void
857	api_ready (SV *coro)	951	api_ready (SV *coro)
858	{	952	{
		953	dTHX;
		954
859	if (SvROK (coro))	955	if (SvROK (coro))
860	coro = SvRV (coro);	956	coro = SvRV (coro);
861		957
		958	LOCK;
862	coro_enq (SvREFCNT_inc (coro));	959	coro_enq (SvREFCNT_inc (coro));
		960	UNLOCK;
		961	}
		962
		963	static void
		964	prepare_schedule (struct transfer_args *ta)
		965	{
		966	SV *current, *prev, *next;
		967
		968	current = GvSV (coro_current);
		969
		970	for (;;)
		971	{
		972	LOCK;
		973	next = coro_deq (PRIO_MIN);
		974	UNLOCK;
		975
		976	if (next)
		977	break;
		978
		979	{
		980	dSP;
		981
		982	ENTER;
		983	SAVETMPS;
		984
		985	PUSHMARK (SP);
		986	PUTBACK;
		987	call_sv (GvSV (coro_idle), G_DISCARD);
		988
		989	FREETMPS;
		990	LEAVE;
		991	}
		992	}
		993
		994	prev = SvRV (current);
		995	SvRV (current) = next;
		996
		997	/* free this only after the transfer */
		998	LOCK;
		999	free_coro_mortal ();
		1000	UNLOCK;
		1001	coro_mortal = prev;
		1002
		1003	ta->prev = SvSTATE (prev);
		1004	ta->next = SvSTATE (next);
		1005	ta->flags = TRANSFER_SAVE_ALL;
		1006	}
		1007
		1008	static void
		1009	prepare_cede (struct transfer_args *ta)
		1010	{
		1011	LOCK;
		1012	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		1013	UNLOCK;
		1014
		1015	prepare_schedule (ta);
863	}	1016	}
864		1017
865	static void	1018	static void
866	api_schedule (void)	1019	api_schedule (void)
867	{	1020	{
868	SV *prev, *next;	1021	dTHX;
		1022	struct transfer_args ta;
869		1023
870	prev = SvRV (GvSV (coro_current));	1024	prepare_schedule (&ta);
871	next = coro_deq (PRIO_MIN);	1025	TRANSFER (ta);
872
873	if (!next)
874	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
875
876	/* free this only after the transfer */
877	coro_mortal = prev;
878	SV_CORO (prev, "Coro::schedule");
879
880	SvRV (GvSV (coro_current)) = next;
881
882	SV_CORO (next, "Coro::schedule");
883
884	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
885	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
886	}	1026	}
887		1027
888	static void	1028	static void
889	api_cede (void)	1029	api_cede (void)
890	{	1030	{
891	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1031	dTHX;
		1032	struct transfer_args ta;
892		1033
893	api_schedule ();	1034	prepare_cede (&ta);
		1035	TRANSFER (ta);
894	}	1036	}
895		1037
896	MODULE = Coro::State PACKAGE = Coro::State	1038	MODULE = Coro::State PACKAGE = Coro::State
897		1039
898	PROTOTYPES: ENABLE	1040	PROTOTYPES: DISABLE
899		1041
900	BOOT:	1042	BOOT:
901	{ /* {} necessary for stoopid perl-5.6.x */	1043	{
902	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1044	#ifdef USE_ITHREADS
903	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1045	MUTEX_INIT (&coro_mutex);
		1046	#endif
		1047	BOOT_PAGESIZE;
		1048
904	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1049	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
905		1050
906	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1051	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
907	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1052	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
908	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1053	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
909	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
910
911	if (!padlist_cache)
912	padlist_cache = newHV ();
913		1054
914	main_mainstack = PL_mainstack;	1055	main_mainstack = PL_mainstack;
915		1056
916	coroapi.ver = CORO_API_VERSION;	1057	coroapi.ver = CORO_API_VERSION;
917	coroapi.transfer = api_transfer;	1058	coroapi.transfer = api_transfer;
918	}
919		1059
920	Coro::State	1060	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
921	_newprocess(args)	1061	}
922	SV * args	1062
923	PROTOTYPE: $	1063	SV *
		1064	new (char *klass, ...)
924	CODE:	1065	CODE:
925	Coro__State coro;	1066	{
		1067	struct coro *coro;
		1068	HV *hv;
		1069	int i;
926		1070
927	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
928	croak ("Coro::State::_newprocess expects an arrayref");
929
930	New (0, coro, 1, struct coro);	1071	Newz (0, coro, 1, struct coro);
		1072	coro->args = newAV ();
931		1073
932	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1074	hv = newHV ();
		1075	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1076	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1077
		1078	for (i = 1; i < items; i++)
		1079	av_push (coro->args, newSVsv (ST (i)));
		1080
933	coro->mainstack = 0; /* actual work is done inside transfer */	1081	/*coro->mainstack = 0; *//*actual work is done inside transfer */
934	coro->stack = 0;	1082	/*coro->stack = 0;*/
935		1083	}
936	/* same as JMPENV_BOOTSTRAP */
937	/* we might be able to recycle start_env, but safe is safe */
938	Zero(&coro->start_env, 1, JMPENV);
939	coro->start_env.je_ret = -1;
940	coro->start_env.je_mustcatch = TRUE;
941
942	RETVAL = coro;
943	OUTPUT:	1084	OUTPUT:
944	RETVAL	1085	RETVAL
945		1086
946	void	1087	void
947	transfer(prev, next, flags)	1088	_set_stacklevel (...)
948	SV *prev	1089	ALIAS:
949	SV *next	1090	Coro::State::transfer = 1
950	int flags	1091	Coro::schedule = 2
951	PROTOTYPE: @	1092	Coro::cede = 3
		1093	Coro::Cont::yield = 4
952	CODE:	1094	CODE:
953	PUTBACK;	1095	{
954	SV_CORO (next, "Coro::transfer");	1096	struct transfer_args ta;
955	SV_CORO (prev, "Coro::transfer");	1097
956	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1098	switch (ix)
957	SPAGAIN;	1099	{
		1100	case 0:
		1101	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
		1102	ta.next = 0;
		1103	ta.flags = TRANSFER_SET_STACKLEVEL;
		1104	break;
		1105
		1106	case 1:
		1107	if (items != 3)
		1108	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1109
		1110	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1111	break;
		1112
		1113	case 2:
		1114	prepare_schedule (&ta);
		1115	break;
		1116
		1117	case 3:
		1118	prepare_cede (&ta);
		1119	break;
		1120
		1121	case 4:
		1122	{
		1123	SV *yieldstack;
		1124	SV *sv;
		1125	AV *defav = GvAV (PL_defgv);
		1126
		1127	yieldstack = *hv_fetch (
		1128	(HV *)SvRV (GvSV (coro_current)),
		1129	"yieldstack", sizeof ("yieldstack") - 1,
		1130	0
		1131	);
		1132
		1133	/* set up @_ -- ugly */
		1134	av_clear (defav);
		1135	av_fill (defav, items - 1);
		1136	while (items--)
		1137	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1138
		1139	sv = av_pop ((AV *)SvRV (yieldstack));
		1140	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1141	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1142	ta.flags = 0;
		1143	SvREFCNT_dec (sv);
		1144	}
		1145	break;
		1146
		1147	}
		1148
		1149	TRANSFER (ta);
		1150	}
958		1151
959	void	1152	void
960	DESTROY(coro)	1153	_clone_state_from (SV *dst, SV *src)
961	Coro::State coro	1154	CODE:
962	CODE:	1155	{
		1156	struct coro *coro_src = SvSTATE (src);
963		1157
964	if (coro->mainstack && coro->mainstack != main_mainstack)	1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
965	{
966	struct coro temp;
967		1159
968	PUTBACK;	1160	++coro_src->refcnt;
969	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1161	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
970	LOAD(aTHX_ coro);	1162	}
971	SPAGAIN;
972
973	destroy_stacks (aTHX);
974
975	LOAD((&temp)); /* this will get rid of defsv etc.. */
976	SPAGAIN;
977
978	coro->mainstack = 0;
979	}
980
981	deallocate_stack (coro);
982
983	Safefree (coro);
984		1163
985	void	1164	void
986	flush()
987	CODE:
988	#ifdef MAY_FLUSH
989	flush_padlist_cache ();
990	#endif
991
992	void
993	_exit(code)	1165	_exit (code)
994	int code	1166	int code
995	PROTOTYPE: $	1167	PROTOTYPE: $
996	CODE:	1168	CODE:
997	#if defined(__GLIBC__) || _POSIX_C_SOURCE
998	_exit (code);	1169	_exit (code);
999	#else
1000	signal (SIGTERM, SIG_DFL);
1001	raise (SIGTERM);
1002	exit (code);
1003	#endif
1004
1005	MODULE = Coro::State PACKAGE = Coro::Cont
1006
1007	# this is slightly dirty (should expose a c-level api)
1008
1009	void
1010	yield(...)
1011	PROTOTYPE: @
1012	CODE:
1013	static SV *returnstk;
1014	SV *sv;
1015	AV *defav = GvAV (PL_defgv);
1016	struct coro *prev, *next;
1017
1018	if (!returnstk)
1019	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1020
1021	/* set up @_ -- ugly */
1022	av_clear (defav);
1023	av_fill (defav, items - 1);
1024	while (items--)
1025	av_store (defav, items, SvREFCNT_inc (ST(items)));
1026
1027	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1028	sv = av_pop ((AV *)SvRV (returnstk));
1029	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1030	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1031	SvREFCNT_dec (sv);
1032
1033	transfer(aTHX_ prev, next, 0);
1034		1170
1035	MODULE = Coro::State PACKAGE = Coro	1171	MODULE = Coro::State PACKAGE = Coro
1036		1172
1037	# this is slightly dirty (should expose a c-level api)
1038
1039	BOOT:	1173	BOOT:
1040	{	1174	{
1041	int i;	1175	int i;
		1176
1042	HV *stash = gv_stashpv ("Coro", TRUE);	1177	coro_stash = gv_stashpv ("Coro", TRUE);
1043		1178
1044	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1179	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1045	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1180	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1046	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1181	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1047	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1182	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1048	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1183	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1049	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1184	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1050		1185
1051	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1186	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1052	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1187	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1053		1188
1054	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1189	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1062	coroapi.ready = api_ready;	1197	coroapi.ready = api_ready;
1063	coroapi.nready = &coro_nready;	1198	coroapi.nready = &coro_nready;
1064	coroapi.current = coro_current;	1199	coroapi.current = coro_current;
1065		1200
1066	GCoroAPI = &coroapi;	1201	GCoroAPI = &coroapi;
1067	sv_setiv(sv, (IV)&coroapi);	1202	sv_setiv (sv, (IV)&coroapi);
1068	SvREADONLY_on(sv);	1203	SvREADONLY_on (sv);
1069	}	1204	}
1070	}	1205	}
1071		1206
		1207	int
		1208	prio (Coro::State coro, int newprio = 0)
		1209	ALIAS:
		1210	nice = 1
		1211	CODE:
		1212	{
		1213	RETVAL = coro->prio;
		1214
		1215	if (items > 1)
		1216	{
		1217	if (ix)
		1218	newprio += coro->prio;
		1219
		1220	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1221	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1222
		1223	coro->prio = newprio;
		1224	}
		1225	}
		1226
1072	void	1227	void
1073	ready(self)	1228	ready (SV *self)
1074	SV * self
1075	PROTOTYPE: $	1229	PROTOTYPE: $
1076	CODE:	1230	CODE:
1077	api_ready (self);	1231	api_ready (self);
1078		1232
1079	int	1233	int
1080	nready(...)	1234	nready (...)
1081	PROTOTYPE:	1235	PROTOTYPE:
1082	CODE:	1236	CODE:
1083	RETVAL = coro_nready;	1237	RETVAL = coro_nready;
1084	OUTPUT:	1238	OUTPUT:
1085	RETVAL	1239	RETVAL
1086		1240
		1241	MODULE = Coro::State PACKAGE = Coro::AIO
		1242
		1243	SV *
		1244	_get_state ()
		1245	CODE:
		1246	{
		1247	struct {
		1248	int errorno;
		1249	int laststype;
		1250	int laststatval;
		1251	Stat_t statcache;
		1252	} data;
		1253
		1254	data.errorno = errno;
		1255	data.laststype = PL_laststype;
		1256	data.laststatval = PL_laststatval;
		1257	data.statcache = PL_statcache;
		1258
		1259	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1260	}
		1261	OUTPUT:
		1262	RETVAL
		1263
1087	void	1264	void
1088	schedule(...)	1265	_set_state (char *data_)
1089	PROTOTYPE:	1266	PROTOTYPE: $
1090	CODE:	1267	CODE:
1091	api_schedule ();	1268	{
		1269	struct {
		1270	int errorno;
		1271	int laststype;
		1272	int laststatval;
		1273	Stat_t statcache;
		1274	} *data = (void *)data_;
1092		1275
1093	void	1276	errno = data->errorno;
1094	cede(...)	1277	PL_laststype = data->laststype;
1095	PROTOTYPE:	1278	PL_laststatval = data->laststatval;
1096	CODE:	1279	PL_statcache = data->statcache;
1097	api_cede ();	1280	}
1098

Diff Legend

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