ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.49 by pcg, Sun Nov 23 03:34:13 2003 UTC vs.
Revision 1.97 by root, Sun Nov 26 21:21:14 2006 UTC

		1	#define PERL_NO_GET_CONTEXT
		2
		3	#include "libcoro/coro.c"
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "patchlevel.h"	9	#include "patchlevel.h"
6		10
7	#if PATCHLEVEL < 6	11	#if PERL_VERSION < 6
8	# ifndef PL_ppaddr	12	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	13	# define PL_ppaddr ppaddr
10	# endif	14	# endif
11	# ifndef call_sv	15	# ifndef call_sv
12	# define call_sv perl_call_sv	16	# define call_sv perl_call_sv
…		…
23	# ifndef IS_PADCONST	27	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	28	# define IS_PADCONST(v) 0
25	# endif	29	# endif
26	#endif	30	#endif
27		31
28	#include "libcoro/coro.c"
29
30	#include <signal.h>	32	#include <stdio.h>
		33	#include <errno.h>
		34
		35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		36	# undef STACKGUARD
		37	#endif
		38
		39	#ifndef STACKGUARD
		40	# define STACKGUARD 0
		41	#endif
31		42
32	#ifdef HAVE_MMAP	43	#ifdef HAVE_MMAP
33	# include <unistd.h>	44	# include <unistd.h>
34	# include <sys/mman.h>	45	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS	46	# ifndef MAP_ANONYMOUS
…		…
37	# define MAP_ANONYMOUS MAP_ANON	48	# define MAP_ANONYMOUS MAP_ANON
38	# else	49	# else
39	# undef HAVE_MMAP	50	# undef HAVE_MMAP
40	# endif	51	# endif
41	# endif	52	# endif
		53	# include <limits.h>
		54	# ifndef PAGESIZE
		55	# define PAGESIZE pagesize
		56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		57	static long pagesize;
		58	# else
		59	# define BOOT_PAGESIZE
42	#endif	60	# endif
43		61	#endif
44	#define MAY_FLUSH /* increases codesize and is rarely used */
45
46	#define SUB_INIT "Coro::State::initialize"
47	#define UCORO_STATE "_coro_state"
48		62
49	/* The next macro should declare a variable stacklevel that contains and approximation	63	/* The next macro should declare a variable stacklevel that contains and approximation
50	* to the current C stack pointer. Its property is that it changes with each call	64	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	65	* and should be unique. */
		66	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	67	#define STACKLEVEL ((void *)&stacklevel)
53		68
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	69	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		70
56	#define labs(l) ((l) >= 0 ? (l) : -(l))
57
58	#include "CoroAPI.h"	71	#include "CoroAPI.h"
59		72
		73	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
		74
		75	#ifdef USE_ITHREADS
		76	static perl_mutex coro_mutex;
		77	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		78	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		79	#else
		80	# define LOCK (void)0
		81	# define UNLOCK (void)0
		82	#endif
		83
60	static struct CoroAPI coroapi;	84	static struct CoroAPI coroapi;
		85	static AV *main_mainstack; /* used to differentiate between $main and others */
		86	static HV *coro_state_stash, *coro_stash;
		87	static SV *coro_mortal; /* will be freed after next transfer */
61		88
62	/* this is actually not only the c stack but also c registers etc... */	89	/* this is a structure representing a c-level coroutine */
63	typedef struct {	90	typedef struct coro_stack {
64	int refcnt; /* pointer reference counter */	91	struct coro_stack *next;
65	int usecnt; /* shared by how many coroutines */
66	int gencnt; /* generation counter */
67		92
68	coro_context cctx;	93	/* the stack */
69
70	void *sptr;	94	void *sptr;
71	long ssize; /* positive == mmap, otherwise malloc */	95	long ssize; /* positive == mmap, otherwise malloc */
		96
		97	/* cpu state */
		98	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		99	JMPENV *top_env;
		100	coro_context cctx;
72	} coro_stack;	101	} coro_stack;
73		102
		103	/* this is a structure representing a perl-level coroutine */
74	struct coro {	104	struct coro {
75	/* the top-level JMPENV for each coroutine, needed to catch dies. */	105	/* the c coroutine allocated to this perl coroutine, if any */
76	JMPENV start_env;
77
78	/* the optional C context */
79	coro_stack *stack;	106	coro_stack *stack;
80	void *cursp;	107
		108	/* data associated with this coroutine (initial args) */
		109	AV *args;
81	int gencnt;	110	int refcnt;
82		111
83	/* optionally saved, might be zero */	112	/* optionally saved, might be zero */
84	AV *defav;	113	AV *defav;
85	SV *defsv;	114	SV *defsv;
86	SV *errsv;	115	SV *errsv;
…		…
95	AV *mainstack;	124	AV *mainstack;
96	SV **stack_sp;	125	SV **stack_sp;
97	OP *op;	126	OP *op;
98	SV **curpad;	127	SV **curpad;
99	AV *comppad;	128	AV *comppad;
		129	CV *compcv;
100	SV **stack_base;	130	SV **stack_base;
101	SV **stack_max;	131	SV **stack_max;
102	SV **tmps_stack;	132	SV **tmps_stack;
103	I32 tmps_floor;	133	I32 tmps_floor;
104	I32 tmps_ix;	134	I32 tmps_ix;
…		…
113	I32 savestack_ix;	143	I32 savestack_ix;
114	I32 savestack_max;	144	I32 savestack_max;
115	OP **retstack;	145	OP **retstack;
116	I32 retstack_ix;	146	I32 retstack_ix;
117	I32 retstack_max;	147	I32 retstack_max;
		148	PMOP *curpm;
118	COP *curcop;	149	COP *curcop;
119	JMPENV *top_env;
120		150
121	/* data associated with this coroutine (initial args) */	151	/* coro process data */
122	AV *args;	152	int prio;
123	};	153	};
124		154
125	typedef struct coro *Coro__State;	155	typedef struct coro *Coro__State;
126	typedef struct coro *Coro__State_or_hashref;	156	typedef struct coro *Coro__State_or_hashref;
127		157
128	static AV *main_mainstack; /* used to differentiate between $main and others */	158	static AV *
129	static HV *coro_state_stash;	159	coro_clone_padlist (pTHX_ CV *cv)
130	static SV *ucoro_state_sv;
131	static U32 ucoro_state_hash;
132	static HV *padlist_cache;
133	static SV *coro_mortal; /* will be freed after next transfer */
134
135	/* mostly copied from op.c:cv_clone2 */
136	STATIC AV *
137	clone_padlist (AV *protopadlist)
138	{	160	{
139	AV *av;	161	AV *padlist = CvPADLIST (cv);
140	I32 ix;
141	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
142	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
143	SV **pname = AvARRAY (protopad_name);
144	SV **ppad = AvARRAY (protopad);
145	I32 fname = AvFILLp (protopad_name);
146	I32 fpad = AvFILLp (protopad);
147	AV *newpadlist, *newpad_name, *newpad;	162	AV *newpadlist, *newpad;
148	SV **npad;
149
150	newpad_name = newAV ();
151	for (ix = fname; ix >= 0; ix--)
152	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
153
154	newpad = newAV ();
155	av_fill (newpad, AvFILLp (protopad));
156	npad = AvARRAY (newpad);
157		163
158	newpadlist = newAV ();	164	newpadlist = newAV ();
159	AvREAL_off (newpadlist);	165	AvREAL_off (newpadlist);
160	av_store (newpadlist, 0, (SV *) newpad_name);	166	#if PERL_VERSION < 9
		167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		168	#else
		169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		170	#endif
		171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		172	--AvFILLp (padlist);
		173
		174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
161	av_store (newpadlist, 1, (SV *) newpad);	175	av_store (newpadlist, 1, (SV *)newpad);
162		176
163	av = newAV (); /* will be @_ */	177	return newpadlist;
164	av_extend (av, 0);	178	}
165	av_store (newpad, 0, (SV *) av);
166	AvFLAGS (av) = AVf_REIFY;
167		179
168	for (ix = fpad; ix > 0; ix--)	180	static void
		181	free_padlist (pTHX_ AV *padlist)
		182	{
		183	/* may be during global destruction */
		184	if (SvREFCNT (padlist))
169	{	185	{
170	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	186	I32 i = AvFILLp (padlist);
171	if (namesv && namesv != &PL_sv_undef)	187	while (i >= 0)
172	{	188	{
173	char *name = SvPVX (namesv); /* XXX */	189	SV **svp = av_fetch (padlist, i--, FALSE);
174	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	190	if (svp)
175	{ /* lexical from outside? */
176	npad[ix] = SvREFCNT_inc (ppad[ix]);
177	}	191	{
178	else
179	{ /* our own lexical */
180	SV *sv;	192	SV *sv;
181	if (*name == '&')	193	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
182	sv = SvREFCNT_inc (ppad[ix]);	194	SvREFCNT_dec (sv);
183	else if (*name == '@')	195
184	sv = (SV *) newAV ();	196	SvREFCNT_dec (*svp);
185	else if (*name == '%')
186	sv = (SV *) newHV ();
187	else
188	sv = NEWSV (0, 0);
189	#ifdef SvPADBUSY
190	if (!SvPADBUSY (sv))
191	#endif
192	SvPADMY_on (sv);
193	npad[ix] = sv;
194	}	197	}
195	}	198	}
196	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	199
197	{	200	SvREFCNT_dec ((SV*)padlist);
198	npad[ix] = SvREFCNT_inc (ppad[ix]);
199	}
200	else
201	{
202	SV *sv = NEWSV (0, 0);
203	SvPADTMP_on (sv);
204	npad[ix] = sv;
205	}
206	}	201	}
		202	}
207		203
208	#if 0 /* return -ENOTUNDERSTOOD */	204	static int
209	/* Now that vars are all in place, clone nested closures. */	205	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		206	{
		207	AV *padlist;
		208	AV *av = (AV *)mg->mg_obj;
210		209
211	for (ix = fpad; ix > 0; ix--) {	210	/* casting is fun. */
212	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	211	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
213	if (namesv	212	free_padlist (aTHX_ padlist);
214	&& namesv != &PL_sv_undef	213
215	&& !(SvFLAGS(namesv) & SVf_FAKE)	214	SvREFCNT_dec (av);
216	&& *SvPVX(namesv) == '&'	215
217	&& CvCLONE(ppad[ix]))	216	return 0;
218	{	217	}
219	CV *kid = cv_clone((CV*)ppad[ix]);	218
220	SvREFCNT_dec(ppad[ix]);	219	#define PERL_MAGIC_coro PERL_MAGIC_ext
221	CvCLONE_on(kid);	220
222	SvPADMY_on(kid);	221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
223	npad[ix] = (SV*)kid;	222
224	}	223	/* the next two functions merely cache the padlists */
		224	static void
		225	get_padlist (pTHX_ CV *cv)
		226	{
		227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		228
		229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
		230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
		231	else
		232	{
		233	#if 0
		234	/* this is probably cleaner, but also slower? */
		235	CV *cp = Perl_cv_clone (aTHX_ cv);
		236	CvPADLIST (cv) = CvPADLIST (cp);
		237	CvPADLIST (cp) = 0;
		238	SvREFCNT_dec (cp);
		239	#else
		240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		241	#endif
		242	}
		243	}
		244
		245	static void
		246	put_padlist (pTHX_ CV *cv)
		247	{
		248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		249
		250	if (!mg)
		251	{
		252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		254	mg->mg_virtual = &vtbl_coro;
		255	mg->mg_obj = (SV *)newAV ();
225	}	256	}
226	#endif
227		257
228	return newpadlist;
229	}
230
231	#ifdef MAY_FLUSH
232	STATIC void
233	free_padlist (AV *padlist)
234	{
235	/* may be during global destruction */
236	if (SvREFCNT(padlist))
237	{
238	I32 i = AvFILLp(padlist);
239	while (i >= 0)
240	{
241	SV **svp = av_fetch(padlist, i--, FALSE);
242	SV *sv = svp ? *svp : Nullsv;
243	if (sv)
244	SvREFCNT_dec(sv);
245	}
246
247	SvREFCNT_dec((SV*)padlist);
248	}
249	}
250	#endif
251
252	/* the next two functions merely cache the padlists */
253	STATIC void
254	get_padlist (CV *cv)
255	{
256	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
257
258	if (he && AvFILLp ((AV *)*he) >= 0)
259	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
260	else
261	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
262	}
263
264	STATIC void
265	put_padlist (CV *cv)
266	{
267	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
268
269	if (SvTYPE (*he) != SVt_PVAV)
270	{
271	SvREFCNT_dec (*he);
272	*he = (SV *)newAV ();
273	}
274
275	av_push ((AV *)*he, (SV *)CvPADLIST (cv));	258	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
276	}	259	}
277
278	#ifdef MAY_FLUSH
279	STATIC void
280	flush_padlist_cache ()
281	{
282	HV *hv = padlist_cache;
283	padlist_cache = newHV ();
284
285	if (hv_iterinit (hv))
286	{
287	HE *he;
288	AV *padlist;
289
290	while (!!(he = hv_iternext (hv)))
291	{
292	AV *av = (AV *)HeVAL(he);
293
294	/* casting is fun. */
295	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
296	free_padlist (padlist);
297	}
298	}
299
300	SvREFCNT_dec (hv);
301	}
302	#endif
303		260
304	#define SB do {	261	#define SB do {
305	#define SE } while (0)	262	#define SE } while (0)
306		263
307	#define LOAD(state) load_state(aTHX_ (state));	264	#define LOAD(state) load_state(aTHX_ (state));
…		…
320	PL_mainstack = c->mainstack;	277	PL_mainstack = c->mainstack;
321	PL_stack_sp = c->stack_sp;	278	PL_stack_sp = c->stack_sp;
322	PL_op = c->op;	279	PL_op = c->op;
323	PL_curpad = c->curpad;	280	PL_curpad = c->curpad;
324	PL_comppad = c->comppad;	281	PL_comppad = c->comppad;
		282	PL_compcv = c->compcv;
325	PL_stack_base = c->stack_base;	283	PL_stack_base = c->stack_base;
326	PL_stack_max = c->stack_max;	284	PL_stack_max = c->stack_max;
327	PL_tmps_stack = c->tmps_stack;	285	PL_tmps_stack = c->tmps_stack;
328	PL_tmps_floor = c->tmps_floor;	286	PL_tmps_floor = c->tmps_floor;
329	PL_tmps_ix = c->tmps_ix;	287	PL_tmps_ix = c->tmps_ix;
…		…
335	PL_scopestack_ix = c->scopestack_ix;	293	PL_scopestack_ix = c->scopestack_ix;
336	PL_scopestack_max = c->scopestack_max;	294	PL_scopestack_max = c->scopestack_max;
337	PL_savestack = c->savestack;	295	PL_savestack = c->savestack;
338	PL_savestack_ix = c->savestack_ix;	296	PL_savestack_ix = c->savestack_ix;
339	PL_savestack_max = c->savestack_max;	297	PL_savestack_max = c->savestack_max;
		298	#if PERL_VERSION < 9
340	PL_retstack = c->retstack;	299	PL_retstack = c->retstack;
341	PL_retstack_ix = c->retstack_ix;	300	PL_retstack_ix = c->retstack_ix;
342	PL_retstack_max = c->retstack_max;	301	PL_retstack_max = c->retstack_max;
		302	#endif
		303	PL_curpm = c->curpm;
343	PL_curcop = c->curcop;	304	PL_curcop = c->curcop;
344	PL_top_env = c->top_env;
345		305
346	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
347	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
348	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
349		309
…		…
356	{	316	{
357	AV *padlist = (AV *)POPs;	317	AV *padlist = (AV *)POPs;
358		318
359	if (padlist)	319	if (padlist)
360	{	320	{
361	put_padlist (cv); /* mark this padlist as available */	321	put_padlist (aTHX_ cv); /* mark this padlist as available */
362	CvPADLIST(cv) = padlist;	322	CvPADLIST(cv) = padlist;
363	#ifdef USE_THREADS
364	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
365	#endif
366	}	323	}
367		324
368	++CvDEPTH(cv);	325	++CvDEPTH(cv);
369	}	326	}
370		327
…		…
397	if (CxTYPE(cx) == CXt_SUB)	354	if (CxTYPE(cx) == CXt_SUB)
398	{	355	{
399	CV *cv = cx->blk_sub.cv;	356	CV *cv = cx->blk_sub.cv;
400	if (CvDEPTH(cv))	357	if (CvDEPTH(cv))
401	{	358	{
402	#ifdef USE_THREADS
403	/*XPUSHs ((SV *)CvOWNER(cv));*/
404	/*CvOWNER(cv) = 0;*/
405	/*error must unlock this cv etc.. etc...*/
406	#endif
407	EXTEND (SP, CvDEPTH(cv)*2);	359	EXTEND (SP, CvDEPTH(cv)*2);
408		360
409	while (--CvDEPTH(cv))	361	while (--CvDEPTH(cv))
410	{	362	{
411	/* this tells the restore code to increment CvDEPTH */	363	/* this tells the restore code to increment CvDEPTH */
…		…
414	}	366	}
415		367
416	PUSHs ((SV *)CvPADLIST(cv));	368	PUSHs ((SV *)CvPADLIST(cv));
417	PUSHs ((SV *)cv);	369	PUSHs ((SV *)cv);
418		370
419	get_padlist (cv); /* this is a monster */	371	get_padlist (aTHX_ cv);
420	}	372	}
421	}	373	}
422	#ifdef CXt_FORMAT	374	#ifdef CXt_FORMAT
423	else if (CxTYPE(cx) == CXt_FORMAT)	375	else if (CxTYPE(cx) == CXt_FORMAT)
424	{	376	{
…		…
452	c->mainstack = PL_mainstack;	404	c->mainstack = PL_mainstack;
453	c->stack_sp = PL_stack_sp;	405	c->stack_sp = PL_stack_sp;
454	c->op = PL_op;	406	c->op = PL_op;
455	c->curpad = PL_curpad;	407	c->curpad = PL_curpad;
456	c->comppad = PL_comppad;	408	c->comppad = PL_comppad;
		409	c->compcv = PL_compcv;
457	c->stack_base = PL_stack_base;	410	c->stack_base = PL_stack_base;
458	c->stack_max = PL_stack_max;	411	c->stack_max = PL_stack_max;
459	c->tmps_stack = PL_tmps_stack;	412	c->tmps_stack = PL_tmps_stack;
460	c->tmps_floor = PL_tmps_floor;	413	c->tmps_floor = PL_tmps_floor;
461	c->tmps_ix = PL_tmps_ix;	414	c->tmps_ix = PL_tmps_ix;
…		…
467	c->scopestack_ix = PL_scopestack_ix;	420	c->scopestack_ix = PL_scopestack_ix;
468	c->scopestack_max = PL_scopestack_max;	421	c->scopestack_max = PL_scopestack_max;
469	c->savestack = PL_savestack;	422	c->savestack = PL_savestack;
470	c->savestack_ix = PL_savestack_ix;	423	c->savestack_ix = PL_savestack_ix;
471	c->savestack_max = PL_savestack_max;	424	c->savestack_max = PL_savestack_max;
		425	#if PERL_VERSION < 9
472	c->retstack = PL_retstack;	426	c->retstack = PL_retstack;
473	c->retstack_ix = PL_retstack_ix;	427	c->retstack_ix = PL_retstack_ix;
474	c->retstack_max = PL_retstack_max;	428	c->retstack_max = PL_retstack_max;
		429	#endif
		430	c->curpm = PL_curpm;
475	c->curcop = PL_curcop;	431	c->curcop = PL_curcop;
476	c->top_env = PL_top_env;
477	}	432	}
478		433
479	/*	434	/*
480	* allocate various perl stacks. This is an exact copy	435	* allocate various perl stacks. This is an exact copy
481	* of perl.c:init_stacks, except that it uses less memory	436	* of perl.c:init_stacks, except that it uses less memory
482	* on the assumption that coroutines do not usually need	437	* on the (sometimes correct) assumption that coroutines do
483	* a lot of stackspace.	438	* not usually need a lot of stackspace.
484	*/	439	*/
485	STATIC void	440	static void
486	coro_init_stacks (pTHX)	441	coro_init_stacks (pTHX)
487	{	442	{
		443	LOCK;
		444
488	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	445	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
489	PL_curstackinfo->si_type = PERLSI_MAIN;	446	PL_curstackinfo->si_type = PERLSI_MAIN;
490	PL_curstack = PL_curstackinfo->si_stack;	447	PL_curstack = PL_curstackinfo->si_stack;
491	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	448	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
492		449
…		…
513		470
514	New(54,PL_savestack,96,ANY);	471	New(54,PL_savestack,96,ANY);
515	PL_savestack_ix = 0;	472	PL_savestack_ix = 0;
516	PL_savestack_max = 96;	473	PL_savestack_max = 96;
517		474
		475	#if PERL_VERSION < 9
518	New(54,PL_retstack,8,OP*);	476	New(54,PL_retstack,8,OP*);
519	PL_retstack_ix = 0;	477	PL_retstack_ix = 0;
520	PL_retstack_max = 8;	478	PL_retstack_max = 8;
		479	#endif
		480
		481	UNLOCK;
521	}	482	}
522		483
523	/*	484	/*
524	* destroy the stacks, the callchain etc...	485	* destroy the stacks, the callchain etc...
525	*/	486	*/
526	STATIC void	487	static void
527	destroy_stacks(pTHX)	488	destroy_stacks(pTHX)
528	{	489	{
529	if (!IN_DESTRUCT)	490	if (!IN_DESTRUCT)
530	{	491	{
531	/* is this ugly, I ask? */	492	/* is this ugly, I ask? */
532	while (PL_scopestack_ix)	493	LEAVE_SCOPE (0);
533	LEAVE;
534		494
535	/* sure it is, but more important: is it correct?? :/ */	495	/* sure it is, but more important: is it correct?? :/ */
536	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
537	FREETMPS;	496	FREETMPS;
		497
		498	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
538	}	499	}
539		500
540	while (PL_curstackinfo->si_next)	501	while (PL_curstackinfo->si_next)
541	PL_curstackinfo = PL_curstackinfo->si_next;	502	PL_curstackinfo = PL_curstackinfo->si_next;
542		503
543	while (PL_curstackinfo)	504	while (PL_curstackinfo)
544	{	505	{
545	PERL_SI *p = PL_curstackinfo->si_prev;	506	PERL_SI *p = PL_curstackinfo->si_prev;
546		507
547	{	508	{ /*D*//*remove*/
548	dSP;	509	dSP;
549	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	510	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
550	PUTBACK; /* possibly superfluous */	511	PUTBACK; /* possibly superfluous */
551	}	512	}
552		513
553	if (!IN_DESTRUCT)	514	if (!IN_DESTRUCT)
554	{	515	{
555	dounwind(-1);	516	dounwind (-1);/*D*//*remove*/
556	SvREFCNT_dec(PL_curstackinfo->si_stack);	517	SvREFCNT_dec (PL_curstackinfo->si_stack);
557	}	518	}
558		519
559	Safefree(PL_curstackinfo->si_cxstack);	520	Safefree (PL_curstackinfo->si_cxstack);
560	Safefree(PL_curstackinfo);	521	Safefree (PL_curstackinfo);
561	PL_curstackinfo = p;	522	PL_curstackinfo = p;
562	}	523	}
563		524
564	Safefree(PL_tmps_stack);	525	Safefree (PL_tmps_stack);
565	Safefree(PL_markstack);	526	Safefree (PL_markstack);
566	Safefree(PL_scopestack);	527	Safefree (PL_scopestack);
567	Safefree(PL_savestack);	528	Safefree (PL_savestack);
		529	#if PERL_VERSION < 9
568	Safefree(PL_retstack);	530	Safefree (PL_retstack);
569	}
570
571	static void
572	allocate_stack (Coro__State ctx, int alloc)
573	{
574	coro_stack *stack;
575
576	New (0, stack, 1, coro_stack);
577
578	stack->refcnt = 1;
579	stack->usecnt = 1;
580	stack->gencnt = ctx->gencnt = 0;
581	if (alloc)
582	{
583	#if HAVE_MMAP
584	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
585	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
586	if (stack->sptr == (void *)-1)
587	#endif	531	#endif
588	{
589	/*FIXME*//*D*//* reasonable stack size! */
590	stack->ssize = -4096 * sizeof (long);
591	New (0, stack->sptr, 4096, long);
592	}
593	}
594	else
595	stack->sptr = 0;
596
597	ctx->stack = stack;
598	}	532	}
599		533
600	static void	534	static void
601	deallocate_stack (Coro__State ctx)	535	setup_coro (struct coro *coro)
602	{
603	coro_stack *stack = ctx->stack;
604
605	ctx->stack = 0;
606
607	if (stack)
608	{
609	if (!--stack->refcnt)
610	{
611	#ifdef HAVE_MMAP
612	if (stack->ssize > 0 && stack->sptr)
613	munmap (stack->sptr, stack->ssize);
614	else
615	#endif
616	Safefree (stack->sptr);
617
618	Safefree (stack);
619	}
620	else if (ctx->gencnt == stack->gencnt)
621	--stack->usecnt;
622	}
623	}
624
625	static void
626	setup_coro (void *arg)
627	{	536	{
628	/*	537	/*
629	* emulate part of the perl startup here.	538	* emulate part of the perl startup here.
630	*/	539	*/
		540	dTHX;
631	dSP;	541	dSP;
632	Coro__State ctx = (Coro__State)arg;	542	UNOP myop;
633	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);	543	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
634		544
635	coro_init_stacks (aTHX);	545	coro_init_stacks (aTHX);
636	/*PL_curcop = 0;*/	546	/*PL_curcop = 0;*/
637	/*PL_in_eval = PL_in_eval;*/ /* inherit */	547	/*PL_in_eval = PL_in_eval;*/ /* inherit */
638	SvREFCNT_dec (GvAV (PL_defgv));	548	SvREFCNT_dec (GvAV (PL_defgv));
639	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	549	GvAV (PL_defgv) = coro->args; coro->args = 0;
640		550
641	SPAGAIN;	551	SPAGAIN;
642		552
643	if (ctx->stack)	553	Zero (&myop, 1, UNOP);
		554	myop.op_next = Nullop;
		555	myop.op_flags = OPf_WANT_VOID;
		556
		557	PL_op = (OP *)&myop;
		558
		559	PUSHMARK(SP);
		560	XPUSHs (sub_init);
		561	PUTBACK;
		562	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		563	SPAGAIN;
		564
		565	ENTER; /* necessary e.g. for dounwind */
		566	}
		567
		568	static void
		569	free_coro_mortal ()
		570	{
		571	if (coro_mortal)
644	{	572	{
645	ctx->cursp = 0;	573	dTHX;
646		574
647	PUSHMARK(SP);	575	SvREFCNT_dec (coro_mortal);
648	PUTBACK;	576	coro_mortal = 0;
649	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
650
651	if (SvTRUE (ERRSV))
652	croak (NULL);
653	else
654	croak ("FATAL: CCTXT coroutine returned!");
655	}	577	}
656	else
657	{
658	UNOP myop;
659
660	PL_op = (OP *)&myop;
661
662	Zero(&myop, 1, UNOP);
663	myop.op_next = Nullop;
664	myop.op_flags = OPf_WANT_VOID;
665
666	PUSHMARK(SP);
667	XPUSHs (sub_init);
668	/*
669	* the next line is slightly wrong, as PL_op->op_next
670	* is actually being executed so we skip the first op.
671	* that doesn't matter, though, since it is only
672	* pp_nextstate and we never return...
673	* ah yes, and I don't care anyways ;)
674	*/
675	PUTBACK;
676	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
677	SPAGAIN;
678
679	ENTER; /* necessary e.g. for dounwind */
680	}
681	}	578	}
682		579
683	static void	580	static void
684	continue_coro (void *arg)	581	coro_run (void *arg)
685	{	582	{
686	/*	583	/*
687	* this is a _very_ stripped down perl interpreter ;)	584	* this is a _very_ stripped down perl interpreter ;)
688	*/	585	*/
689	Coro__State ctx = (Coro__State)arg;	586	dTHX;
690	JMPENV coro_start_env;	587	int ret;
691		588
		589	UNLOCK;
		590
692	PL_top_env = &ctx->start_env;	591	PL_top_env = &PL_start_env;
693		592
694	ctx->cursp = 0;	593	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
695	PL_op = PL_op->op_next;	594	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
696	CALLRUNOPS(aTHX);
697		595
		596	/* continue at cctx_init, without entersub */
		597	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
		598
		599	/* somebody will hit me for both perl_run and PL_restartop */
		600	ret = perl_run (aTHX_ PERL_GET_CONTEXT);
		601	printf ("ret %d\n", ret);//D
		602
		603	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
698	abort ();	604	abort ();
699	}	605	}
700		606
701	STATIC void	607	static coro_stack *
		608	stack_new ()
		609	{
		610	coro_stack *stack;
		611
		612	New (0, stack, 1, coro_stack);
		613
		614	#if HAVE_MMAP
		615
		616	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		617	/* mmap suppsedly does allocate-on-write for us */
		618	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		619
		620	if (stack->sptr == (void *)-1)
		621	{
		622	perror ("FATAL: unable to mmap stack for coroutine");
		623	_exit (EXIT_FAILURE);
		624	}
		625
		626	# if STACKGUARD
		627	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		628	# endif
		629
		630	#else
		631
		632	stack->ssize = STACKSIZE * (long)sizeof (long);
		633	New (0, stack->sptr, STACKSIZE, long);
		634
		635	if (!stack->sptr)
		636	{
		637	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		638	_exit (EXIT_FAILURE);
		639	}
		640
		641	#endif
		642
		643	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		644
		645	return stack;
		646	}
		647
		648	static void
		649	stack_free (coro_stack *stack)
		650	{
		651	if (!stack)
		652	return;
		653
		654	#if HAVE_MMAP
		655	munmap (stack->sptr, stack->ssize);
		656	#else
		657	Safefree (stack->sptr);
		658	#endif
		659
		660	Safefree (stack);
		661	}
		662
		663	static coro_stack *stack_first;
		664
		665	static coro_stack *
		666	stack_get ()
		667	{
		668	coro_stack *stack;
		669
		670	if (stack_first)
		671	{
		672	stack = stack_first;
		673	stack_first = stack->next;
		674	}
		675	else
		676	{
		677	stack = stack_new ();
		678	PL_op = PL_op->op_next;
		679	}
		680
		681	return stack;
		682	}
		683
		684	static void
		685	stack_put (coro_stack *stack)
		686	{
		687	stack->next = stack_first;
		688	stack_first = stack;
		689	}
		690
		691	/* never call directly, always through the coro_state_transfer global variable */
		692	static void
702	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	693	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
703	{	694	{
704	dSTACKLEVEL;	695	dSTACKLEVEL;
705	static struct coro *xnext;
706		696
		697	/* sometimes transfer is only called to set idle_sp */
		698	if (flags == TRANSFER_SET_STACKLEVEL)
		699	((coro_stack *)prev)->idle_sp = STACKLEVEL;
707	if (prev != next)	700	else if (prev != next)
708	{	701	{
709	xnext = next;	702	coro_stack *prev__stack;
		703
		704	LOCK;
710		705
711	if (next->mainstack)	706	if (next->mainstack)
712	{	707	{
		708	/* coroutine already started */
713	SAVE (prev, flags);	709	SAVE (prev, flags);
714	LOAD (next);	710	LOAD (next);
715
716	/* mark this state as in-use */
717	next->mainstack = 0;
718	next->tmps_ix = -2;
719
720	/* stacklevel changed? if yes, grab the stack for us! */
721	if (flags & TRANSFER_SAVE_CCTXT)
722	{
723	if (!prev->stack)
724	allocate_stack (prev, 0);
725	else if (prev->cursp != stacklevel
726	&& prev->stack->usecnt > 1)
727	{
728	prev->gencnt = ++prev->stack->gencnt;
729	prev->stack->usecnt = 1;
730	}
731
732	/* has our stack been invalidated? */
733	if (next->stack && next->stack->gencnt != next->gencnt)
734	{
735	deallocate_stack (next);
736	allocate_stack (next, 1);
737	coro_create (&(next->stack->cctx),
738	continue_coro, (void *)next,
739	next->stack->sptr, labs (next->stack->ssize));
740	}
741
742	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743	/* don't add any code here */
744	}
745
746	}	711	}
747	else if (next->tmps_ix == -2)
748	croak ("tried to transfer to running coroutine");
749	else	712	else
750	{	713	{
		714	/* need to start coroutine */
751	SAVE (prev, -1); /* first get rid of the old state */	715	/* first get rid of the old state */
752		716	SAVE (prev, -1);
753	if (flags & TRANSFER_SAVE_CCTXT)	717	/* setup coroutine call */
754	{
755	if (!prev->stack)
756	allocate_stack (prev, 0);
757
758	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
759	{
760	PL_top_env = &next->start_env;
761
762	setup_coro (next);
763
764	prev->stack->refcnt++;
765	prev->stack->usecnt++;
766	next->stack = prev->stack;
767	next->gencnt = prev->gencnt;
768	}
769	else
770	{
771	assert (!next->stack);
772	allocate_stack (next, 1);
773	coro_create (&(next->stack->cctx),
774	setup_coro, (void *)next,
775	next->stack->sptr, labs (next->stack->ssize));
776	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
777	/* don't add any code here */
778	}
779	}
780	else
781	setup_coro (next);	718	setup_coro (next);
		719	/* need a stack */
		720	next->stack = 0;
782	}	721	}
783		722
784	/*	723	if (!prev->stack)
785	* xnext is now either prev or next, depending on wether	724	/* create a new empty context */
786	* we switched the c stack or not. that's why I use a global	725	Newz (0, prev->stack, 1, coro_stack);
787	* variable, that should become thread-specific at one point.	726
		727	prev__stack = prev->stack;
		728
		729	/* possibly "free" the stack */
		730	if (prev__stack->idle_sp == STACKLEVEL)
788	*/	731	{
789	xnext->cursp = stacklevel;	732	stack_put (prev__stack);
		733	prev->stack = 0;
		734	}
		735
		736	if (!next->stack)
		737	next->stack = stack_get ();
		738
		739	if (prev__stack != next->stack)
		740	{
		741	prev__stack->top_env = PL_top_env;
		742	PL_top_env = next->stack->top_env;
		743	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		744	}
		745
		746	free_coro_mortal ();
		747
		748	UNLOCK;
790	}	749	}
		750	}
791		751
792	if (coro_mortal)	752	/* use this function pointer to call the above function */
		753	/* this is done to increase chances of the compiler not inlining the call */
		754	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
		755	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
		756
		757	struct transfer_args
		758	{
		759	struct coro *prev, *next;
		760	int flags;
		761	};
		762
		763	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
		764
		765	static void
		766	coro_state_destroy (struct coro *coro)
		767	{
		768	if (coro->refcnt--)
		769	return;
		770
		771	if (coro->mainstack && coro->mainstack != main_mainstack)
793	{	772	{
794	SvREFCNT_dec (coro_mortal);	773	struct coro temp;
		774
		775	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
		776	LOAD (aTHX_ coro);
		777
		778	destroy_stacks (aTHX);
		779
		780	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		781
795	coro_mortal = 0;	782	coro->mainstack = 0;
796	}	783	}
797	}
798		784
799	#define SV_CORO(sv,func) \	785	stack_free (coro->stack);
800	do { \	786	SvREFCNT_dec (coro->args);
801	if (SvROK (sv)) \	787	Safefree (coro);
802	sv = SvRV (sv); \	788	}
803	\
804	if (SvTYPE(sv) == SVt_PVHV) \
805	{ \
806	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
807	\
808	if (!he) \
809	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
810	\
811	(sv) = SvRV (HeVAL(he)); \
812	} \
813	\
814	/* must also be changed inside Coro::Cont::yield */ \
815	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
816	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
817	\
818	} while(0)
819		789
820	#define SvSTATE(sv) (struct coro *)SvIV (sv)
821
822	static void	790	static int
		791	coro_state_clear (SV *sv, MAGIC *mg)
		792	{
		793	struct coro *coro = (struct coro *)mg->mg_ptr;
		794	mg->mg_ptr = 0;
		795
		796	coro_state_destroy (coro);
		797
		798	return 0;
		799	}
		800
		801	static int
		802	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)
		803	{
		804	struct coro *coro = (struct coro *)mg->mg_ptr;
		805
		806	++coro->refcnt;
		807
		808	return 0;
		809	}
		810
		811	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
		812
		813	static struct coro *
		814	SvSTATE (SV *coro)
		815	{
		816	HV *stash;
		817	MAGIC *mg;
		818
		819	if (SvROK (coro))
		820	coro = SvRV (coro);
		821
		822	stash = SvSTASH (coro);
		823	if (stash != coro_stash && stash != coro_state_stash)
		824	{
		825	/* very slow, but rare, check */
		826	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		827	croak ("Coro::State object required");
		828	}
		829
		830	mg = SvMAGIC (coro);
		831	assert (mg->mg_type == PERL_MAGIC_ext);
		832	return (struct coro *)mg->mg_ptr;
		833	}
		834
		835	static void
		836	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)
		837	{
		838	ta->prev = SvSTATE (prev);
		839	ta->next = SvSTATE (next);
		840	ta->flags = flags;
		841	}
		842
		843	static void
823	api_transfer(pTHX_ SV *prev, SV *next, int flags)	844	api_transfer (SV *prev, SV *next, int flags)
824	{	845	{
825	SV_CORO (prev, "Coro::transfer");	846	dTHX;
826	SV_CORO (next, "Coro::transfer");	847	struct transfer_args ta;
827		848
828	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	849	prepare_transfer (aTHX_ &ta, prev, next, flags);
		850	TRANSFER (ta);
829	}	851	}
830		852
831	/** Coro ********************************************************************/	853	/** Coro ********************************************************************/
832		854
833	#define PRIO_MAX 3	855	#define PRIO_MAX 3
…		…
837	#define PRIO_IDLE -3	859	#define PRIO_IDLE -3
838	#define PRIO_MIN -4	860	#define PRIO_MIN -4
839		861
840	/* for Coro.pm */	862	/* for Coro.pm */
841	static GV *coro_current, *coro_idle;	863	static GV *coro_current, *coro_idle;
842	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	864	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
843	static int coro_nready;	865	static int coro_nready;
844		866
845	static void	867	static void
846	coro_enq (SV *sv)	868	coro_enq (pTHX_ SV *sv)
847	{	869	{
		870	int prio;
		871
848	if (SvTYPE (sv) == SVt_PVHV)	872	if (SvTYPE (sv) != SVt_PVHV)
849	{
850	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
851	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
852
853	prio = prio > PRIO_MAX ? PRIO_MAX
854	: prio < PRIO_MIN ? PRIO_MIN
855	: prio;
856
857	av_push (coro_ready [prio - PRIO_MIN], sv);
858	coro_nready++;
859
860	return;
861	}
862
863	croak ("Coro::ready tried to enqueue something that is not a coroutine");	873	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		874
		875	prio = SvSTATE (sv)->prio;
		876
		877	av_push (coro_ready [prio - PRIO_MIN], sv);
		878	coro_nready++;
864	}	879	}
865		880
866	static SV *	881	static SV *
867	coro_deq (int min_prio)	882	coro_deq (pTHX_ int min_prio)
868	{	883	{
869	int prio = PRIO_MAX - PRIO_MIN;	884	int prio = PRIO_MAX - PRIO_MIN;
870		885
871	min_prio -= PRIO_MIN;	886	min_prio -= PRIO_MIN;
872	if (min_prio < 0)	887	if (min_prio < 0)
873	min_prio = 0;	888	min_prio = 0;
874		889
875	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	890	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
876	if (av_len (coro_ready[prio]) >= 0)	891	if (AvFILLp (coro_ready [prio]) >= 0)
877	{	892	{
878	coro_nready--;	893	coro_nready--;
879	return av_shift (coro_ready[prio]);	894	return av_shift (coro_ready [prio]);
880	}	895	}
881		896
882	return 0;	897	return 0;
883	}	898	}
884		899
885	static void	900	static void
886	api_ready (SV *coro)	901	api_ready (SV *coro)
887	{	902	{
		903	dTHX;
		904
888	if (SvROK (coro))	905	if (SvROK (coro))
889	coro = SvRV (coro);	906	coro = SvRV (coro);
890		907
		908	LOCK;
891	coro_enq (SvREFCNT_inc (coro));	909	coro_enq (aTHX_ SvREFCNT_inc (coro));
		910	UNLOCK;
		911	}
		912
		913	static void
		914	prepare_schedule (aTHX_ struct transfer_args *ta)
		915	{
		916	SV *current, *prev, *next;
		917
		918	LOCK;
		919
		920	current = GvSV (coro_current);
		921
		922	for (;;)
		923	{
		924	LOCK;
		925
		926	next = coro_deq (aTHX_ PRIO_MIN);
		927
		928	if (next)
		929	break;
		930
		931	UNLOCK;
		932
		933	{
		934	dSP;
		935
		936	ENTER;
		937	SAVETMPS;
		938
		939	PUSHMARK (SP);
		940	PUTBACK;
		941	call_sv (GvSV (coro_idle), G_DISCARD);
		942
		943	FREETMPS;
		944	LEAVE;
		945	}
		946	}
		947
		948	prev = SvRV (current);
		949	SvRV (current) = next;
		950
		951	/* free this only after the transfer */
		952	free_coro_mortal ();
		953	coro_mortal = prev;
		954
		955	ta->prev = SvSTATE (prev);
		956	ta->next = SvSTATE (next);
		957	ta->flags = TRANSFER_SAVE_ALL;
		958
		959	UNLOCK;
		960	}
		961
		962	static void
		963	prepare_cede (aTHX_ struct transfer_args *ta)
		964	{
		965	LOCK;
		966	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
		967	UNLOCK;
		968
		969	prepare_schedule (ta);
892	}	970	}
893		971
894	static void	972	static void
895	api_schedule (void)	973	api_schedule (void)
896	{	974	{
897	SV *prev, *next;	975	dTHX;
		976	struct transfer_args ta;
898		977
899	prev = SvRV (GvSV (coro_current));	978	prepare_schedule (&ta);
900	next = coro_deq (PRIO_MIN);	979	TRANSFER (ta);
901
902	if (!next)
903	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
904
905	/* free this only after the transfer */
906	coro_mortal = prev;
907	SV_CORO (prev, "Coro::schedule");
908
909	SvRV (GvSV (coro_current)) = next;
910
911	SV_CORO (next, "Coro::schedule");
912
913	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
914	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
915	}	980	}
916		981
917	static void	982	static void
918	api_cede (void)	983	api_cede (void)
919	{	984	{
920	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	985	dTHX;
		986	struct transfer_args ta;
921		987
922	api_schedule ();	988	prepare_cede (&ta);
		989	TRANSFER (ta);
923	}	990	}
924		991
925	MODULE = Coro::State PACKAGE = Coro::State	992	MODULE = Coro::State PACKAGE = Coro::State
926		993
927	PROTOTYPES: ENABLE	994	PROTOTYPES: DISABLE
928		995
929	BOOT:	996	BOOT:
930	{ /* {} necessary for stoopid perl-5.6.x */	997	{
931	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	998	#ifdef USE_ITHREADS
932	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	999	MUTEX_INIT (&coro_mutex);
		1000	#endif
		1001	BOOT_PAGESIZE;
		1002
933	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1003	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
934		1004
935	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1005	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
936	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1006	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
937	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1007	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
938	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
939
940	if (!padlist_cache)
941	padlist_cache = newHV ();
942		1008
943	main_mainstack = PL_mainstack;	1009	main_mainstack = PL_mainstack;
944		1010
945	coroapi.ver = CORO_API_VERSION;	1011	coroapi.ver = CORO_API_VERSION;
946	coroapi.transfer = api_transfer;	1012	coroapi.transfer = api_transfer;
947	}
948		1013
949	Coro::State	1014	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
950	_newprocess(args)	1015	}
951	SV * args	1016
952	PROTOTYPE: $	1017	SV *
		1018	new (char *klass, ...)
953	CODE:	1019	CODE:
954	Coro__State coro;	1020	{
		1021	struct coro *coro;
		1022	HV *hv;
		1023	int i;
955		1024
956	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
957	croak ("Coro::State::_newprocess expects an arrayref");
958
959	Newz (0, coro, 1, struct coro);	1025	Newz (0, coro, 1, struct coro);
		1026	coro->args = newAV ();
960		1027
961	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1028	hv = newHV ();
		1029	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1030	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1031
		1032	for (i = 1; i < items; i++)
		1033	av_push (coro->args, newSVsv (ST (i)));
		1034
962	coro->mainstack = 0; /* actual work is done inside transfer */	1035	/*coro->mainstack = 0; *//*actual work is done inside transfer */
963	coro->stack = 0;	1036	/*coro->stack = 0;*/
964		1037	}
965	/* same as JMPENV_BOOTSTRAP */
966	/* we might be able to recycle start_env, but safe is safe */
967	//Zero(&coro->start_env, 1, JMPENV);
968	coro->start_env.je_ret = -1;
969	coro->start_env.je_mustcatch = TRUE;
970
971	RETVAL = coro;
972	OUTPUT:	1038	OUTPUT:
973	RETVAL	1039	RETVAL
974		1040
975	void	1041	void
976	transfer(prev, next, flags)	1042	_set_stacklevel (...)
977	SV *prev	1043	ALIAS:
978	SV *next	1044	Coro::State::transfer = 1
979	int flags	1045	Coro::schedule = 2
980	PROTOTYPE: @	1046	Coro::cede = 3
		1047	Coro::Cont::yield = 4
981	CODE:	1048	CODE:
982	PUTBACK;	1049	{
983	SV_CORO (next, "Coro::transfer");	1050	struct transfer_args ta;
984	SV_CORO (prev, "Coro::transfer");	1051
985	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1052	switch (ix)
986	SPAGAIN;	1053	{
		1054	case 0:
		1055	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
		1056	ta.next = 0;
		1057	ta.flags = TRANSFER_SET_STACKLEVEL;
		1058	break;
		1059
		1060	case 1:
		1061	if (items != 3)
		1062	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1063
		1064	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1065	break;
		1066
		1067	case 2:
		1068	prepare_schedule (&ta);
		1069	break;
		1070
		1071	case 3:
		1072	prepare_cede (&ta);
		1073	break;
		1074
		1075	case 4:
		1076	{
		1077	SV *yieldstack;
		1078	SV *sv;
		1079	AV *defav = GvAV (PL_defgv);
		1080
		1081	yieldstack = *hv_fetch (
		1082	(HV *)SvRV (GvSV (coro_current)),
		1083	"yieldstack", sizeof ("yieldstack") - 1,
		1084	0
		1085	);
		1086
		1087	/* set up @_ -- ugly */
		1088	av_clear (defav);
		1089	av_fill (defav, items - 1);
		1090	while (items--)
		1091	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1092
		1093	sv = av_pop ((AV *)SvRV (yieldstack));
		1094	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1095	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1096	ta.flags = 0;
		1097	SvREFCNT_dec (sv);
		1098	}
		1099	break;
		1100
		1101	}
		1102
		1103	TRANSFER (ta);
		1104	}
987		1105
988	void	1106	void
989	DESTROY(coro)	1107	_clone_state_from (SV *dst, SV *src)
990	Coro::State coro	1108	CODE:
991	CODE:	1109	{
		1110	struct coro *coro_src = SvSTATE (src);
992		1111
993	if (coro->mainstack && coro->mainstack != main_mainstack)	1112	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
994	{
995	struct coro temp;
996		1113
997	PUTBACK;	1114	++coro_src->refcnt;
998	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1115	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
999	LOAD(aTHX_ coro);	1116	}
1000	SPAGAIN;
1001
1002	destroy_stacks (aTHX);
1003
1004	LOAD((&temp)); /* this will get rid of defsv etc.. */
1005	SPAGAIN;
1006
1007	coro->mainstack = 0;
1008	}
1009
1010	deallocate_stack (coro);
1011	SvREFCNT_dec (coro->args);
1012	Safefree (coro);
1013		1117
1014	void	1118	void
1015	flush()	1119	_nonlocal_goto (IV nextop)
1016	CODE:	1120	CODE:
1017	#ifdef MAY_FLUSH	1121	/* uuh, somebody will kill me again for this */
1018	flush_padlist_cache ();	1122	PL_op->op_next = INT2PTR (OP *, nextop);
1019	#endif
1020		1123
1021	void	1124	void
1022	_exit(code)	1125	_exit (code)
1023	int code	1126	int code
1024	PROTOTYPE: $	1127	PROTOTYPE: $
1025	CODE:	1128	CODE:
1026	#if defined(__GLIBC__) || _POSIX_C_SOURCE
1027	_exit (code);	1129	_exit (code);
1028	#else
1029	signal (SIGTERM, SIG_DFL);
1030	raise (SIGTERM);
1031	exit (code);
1032	#endif
1033
1034	MODULE = Coro::State PACKAGE = Coro::Cont
1035
1036	# this is slightly dirty (should expose a c-level api)
1037
1038	void
1039	yield(...)
1040	PROTOTYPE: @
1041	CODE:
1042	static SV *returnstk;
1043	SV *sv;
1044	AV *defav = GvAV (PL_defgv);
1045	struct coro *prev, *next;
1046
1047	if (!returnstk)
1048	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1049
1050	/* set up @_ -- ugly */
1051	av_clear (defav);
1052	av_fill (defav, items - 1);
1053	while (items--)
1054	av_store (defav, items, SvREFCNT_inc (ST(items)));
1055
1056	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1057	sv = av_pop ((AV *)SvRV (returnstk));
1058	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1059	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1060	SvREFCNT_dec (sv);
1061
1062	transfer(aTHX_ prev, next, 0);
1063		1130
1064	MODULE = Coro::State PACKAGE = Coro	1131	MODULE = Coro::State PACKAGE = Coro
1065		1132
1066	# this is slightly dirty (should expose a c-level api)
1067
1068	BOOT:	1133	BOOT:
1069	{	1134	{
1070	int i;	1135	int i;
		1136
1071	HV *stash = gv_stashpv ("Coro", TRUE);	1137	coro_stash = gv_stashpv ("Coro", TRUE);
1072		1138
1073	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1139	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1074	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1140	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1075	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1141	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1076	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1142	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1077	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1143	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1078	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1144	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1079		1145
1080	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1146	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1081	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1147	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1082		1148
1083	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1149	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1091	coroapi.ready = api_ready;	1157	coroapi.ready = api_ready;
1092	coroapi.nready = &coro_nready;	1158	coroapi.nready = &coro_nready;
1093	coroapi.current = coro_current;	1159	coroapi.current = coro_current;
1094		1160
1095	GCoroAPI = &coroapi;	1161	GCoroAPI = &coroapi;
1096	sv_setiv(sv, (IV)&coroapi);	1162	sv_setiv (sv, (IV)&coroapi);
1097	SvREADONLY_on(sv);	1163	SvREADONLY_on (sv);
1098	}	1164	}
1099	}	1165	}
1100		1166
		1167	int
		1168	prio (Coro::State coro, int newprio = 0)
		1169	ALIAS:
		1170	nice = 1
		1171	CODE:
		1172	{
		1173	RETVAL = coro->prio;
		1174
		1175	if (items > 1)
		1176	{
		1177	if (ix)
		1178	newprio += coro->prio;
		1179
		1180	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1181	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1182
		1183	coro->prio = newprio;
		1184	}
		1185	}
		1186
1101	void	1187	void
1102	ready(self)	1188	ready (SV *self)
1103	SV * self
1104	PROTOTYPE: $	1189	PROTOTYPE: $
1105	CODE:	1190	CODE:
1106	api_ready (self);	1191	api_ready (self);
1107		1192
1108	int	1193	int
1109	nready(...)	1194	nready (...)
1110	PROTOTYPE:	1195	PROTOTYPE:
1111	CODE:	1196	CODE:
1112	RETVAL = coro_nready;	1197	RETVAL = coro_nready;
1113	OUTPUT:	1198	OUTPUT:
1114	RETVAL	1199	RETVAL
1115		1200
		1201	MODULE = Coro::State PACKAGE = Coro::AIO
		1202
		1203	SV *
		1204	_get_state ()
		1205	CODE:
		1206	{
		1207	struct {
		1208	int errorno;
		1209	int laststype;
		1210	int laststatval;
		1211	Stat_t statcache;
		1212	} data;
		1213
		1214	data.errorno = errno;
		1215	data.laststype = PL_laststype;
		1216	data.laststatval = PL_laststatval;
		1217	data.statcache = PL_statcache;
		1218
		1219	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1220	}
		1221	OUTPUT:
		1222	RETVAL
		1223
1116	void	1224	void
1117	schedule(...)	1225	_set_state (char *data_)
1118	PROTOTYPE:	1226	PROTOTYPE: $
1119	CODE:	1227	CODE:
1120	api_schedule ();	1228	{
		1229	struct {
		1230	int errorno;
		1231	int laststype;
		1232	int laststatval;
		1233	Stat_t statcache;
		1234	} *data = (void *)data_;
1121		1235
1122	void	1236	errno = data->errorno;
1123	cede(...)	1237	PL_laststype = data->laststype;
1124	PROTOTYPE:	1238	PL_laststatval = data->laststatval;
1125	CODE:	1239	PL_statcache = data->statcache;
1126	api_cede ();	1240	}
1127

Diff Legend

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