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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.38 by root, Wed Nov 7 00:21:06 2001 UTC vs.
Revision 1.107 by root, Mon Nov 27 02:15:51 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 (void)0
19	#endif	68	# endif
20		69	#else
21	#define MAY_FLUSH /* increases codesize and is rarely used */	70	# define PAGESIZE 0
22		71	# define BOOT_PAGESIZE (void)0
23	#define SUB_INIT "Coro::State::initialize"	72	#endif
24	#define UCORO_STATE "_coro_state"
25		73
26	/* The next macro should declare a variable stacklevel that contains and approximation	74	/* 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	75	* to the current C stack pointer. Its property is that it changes with each call
28	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
30		79
31	#define IN_DESTRUCT (PL_main_cv == Nullcv)	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
32		81
33	#define labs(l) ((l) >= 0 ? (l) : -(l))	82	#if __GNUC__ >= 3
		83	# define attribute(x) __attribute__(x)
		84	#else
		85	# define attribute(x)
		86	#endif
		87
		88	#define NOINLINE attribute ((noinline))
34		89
35	#include "CoroAPI.h"	90	#include "CoroAPI.h"
36		91
		92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
		93
		94	#ifdef USE_ITHREADS
		95	static perl_mutex coro_mutex;
		96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		98	#else
		99	# define LOCK (void)0
		100	# define UNLOCK (void)0
		101	#endif
		102
37	static struct CoroAPI coroapi;	103	static struct CoroAPI coroapi;
		104	static AV *main_mainstack; /* used to differentiate between $main and others */
		105	static HV *coro_state_stash, *coro_stash;
		106	static SV *coro_mortal; /* will be freed after next transfer */
38		107
39	/* this is actually not only the c stack but also c registers etc... */	108	static struct coro_cctx *cctx_first;
		109	static int cctx_count, cctx_idle;
		110
		111	/* this is a structure representing a c-level coroutine */
40	typedef struct {	112	typedef struct coro_cctx {
41	int refcnt; /* pointer reference counter */	113	struct coro_cctx *next;
42	int usecnt; /* shared by how many coroutines */
43	int gencnt; /* generation counter */
44		114
45	coro_context cctx;	115	/* the stack */
46
47	void *sptr;	116	void *sptr;
48	long ssize; /* positive == mmap, otherwise malloc */	117	long ssize; /* positive == mmap, otherwise malloc */
49	} coro_stack;
50		118
		119	/* cpu state */
		120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		121	JMPENV *top_env;
		122	coro_context cctx;
		123
		124	#if USE_VALGRIND
		125	int valgrind_id;
		126	#endif
		127	} coro_cctx;
		128
		129	/* this is a structure representing a perl-level coroutine */
51	struct coro {	130	struct coro {
52	/* the optional C context */	131	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	132	coro_cctx *cctx;
54	void *cursp;	133
		134	/* data associated with this coroutine (initial args) */
		135	AV *args;
55	int gencnt;	136	int refcnt;
56		137
57	/* optionally saved, might be zero */	138	/* optionally saved, might be zero */
58	AV *defav;	139	AV *defav;
59	SV *defsv;	140	SV *defsv;
60	SV *errsv;	141	SV *errsv;
61	/* TODO: PL_pmop might be nice && effortless to save. */
62		142
63	/* saved global state not related to stacks */	143	/* saved global state not related to stacks */
64	U8 dowarn;	144	U8 dowarn;
65	I32 in_eval;	145	I32 in_eval;
66		146
…		…
69	AV *curstack;	149	AV *curstack;
70	AV *mainstack;	150	AV *mainstack;
71	SV **stack_sp;	151	SV **stack_sp;
72	OP *op;	152	OP *op;
73	SV **curpad;	153	SV **curpad;
		154	AV *comppad;
		155	CV *compcv;
74	SV **stack_base;	156	SV **stack_base;
75	SV **stack_max;	157	SV **stack_max;
76	SV **tmps_stack;	158	SV **tmps_stack;
77	I32 tmps_floor;	159	I32 tmps_floor;
78	I32 tmps_ix;	160	I32 tmps_ix;
…		…
87	I32 savestack_ix;	169	I32 savestack_ix;
88	I32 savestack_max;	170	I32 savestack_max;
89	OP **retstack;	171	OP **retstack;
90	I32 retstack_ix;	172	I32 retstack_ix;
91	I32 retstack_max;	173	I32 retstack_max;
		174	PMOP *curpm;
92	COP *curcop;	175	COP *curcop;
93	JMPENV *top_env;
94		176
95	/* data associated with this coroutine (initial args) */	177	/* coro process data */
96	AV *args;	178	int prio;
97	};	179	};
98		180
99	typedef struct coro *Coro__State;	181	typedef struct coro *Coro__State;
100	typedef struct coro *Coro__State_or_hashref;	182	typedef struct coro *Coro__State_or_hashref;
101		183
102	static AV *main_mainstack; /* used to differentiate between $main and others */	184	static AV *
103	static HV *coro_state_stash;	185	coro_clone_padlist (CV *cv)
104	static SV *ucoro_state_sv;
105	static U32 ucoro_state_hash;
106	static HV *padlist_cache;
107
108	/* mostly copied from op.c:cv_clone2 */
109	STATIC AV *
110	clone_padlist (AV *protopadlist)
111	{	186	{
112	AV *av;	187	AV *padlist = CvPADLIST (cv);
113	I32 ix;
114	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
115	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
116	SV **pname = AvARRAY (protopad_name);
117	SV **ppad = AvARRAY (protopad);
118	I32 fname = AvFILLp (protopad_name);
119	I32 fpad = AvFILLp (protopad);
120	AV *newpadlist, *newpad_name, *newpad;	188	AV *newpadlist, *newpad;
121	SV **npad;
122
123	newpad_name = newAV ();
124	for (ix = fname; ix >= 0; ix--)
125	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
126
127	newpad = newAV ();
128	av_fill (newpad, AvFILLp (protopad));
129	npad = AvARRAY (newpad);
130		189
131	newpadlist = newAV ();	190	newpadlist = newAV ();
132	AvREAL_off (newpadlist);	191	AvREAL_off (newpadlist);
133	av_store (newpadlist, 0, (SV *) newpad_name);	192	#if PERL_VERSION_ATLEAST (5,9,0)
		193	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		194	#else
		195	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		196	#endif
		197	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		198	--AvFILLp (padlist);
		199
		200	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
134	av_store (newpadlist, 1, (SV *) newpad);	201	av_store (newpadlist, 1, (SV *)newpad);
135		202
136	av = newAV (); /* will be @_ */	203	return newpadlist;
137	av_extend (av, 0);	204	}
138	av_store (newpad, 0, (SV *) av);
139	AvFLAGS (av) = AVf_REIFY;
140		205
141	for (ix = fpad; ix > 0; ix--)	206	static void
		207	free_padlist (AV *padlist)
		208	{
		209	/* may be during global destruction */
		210	if (SvREFCNT (padlist))
142	{	211	{
143	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	212	I32 i = AvFILLp (padlist);
144	if (namesv && namesv != &PL_sv_undef)	213	while (i >= 0)
145	{	214	{
146	char *name = SvPVX (namesv); /* XXX */	215	SV **svp = av_fetch (padlist, i--, FALSE);
147	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	216	if (svp)
148	{ /* lexical from outside? */
149	npad[ix] = SvREFCNT_inc (ppad[ix]);
150	}	217	{
151	else
152	{ /* our own lexical */
153	SV *sv;	218	SV *sv;
154	if (*name == '&')	219	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
155	sv = SvREFCNT_inc (ppad[ix]);	220	SvREFCNT_dec (sv);
156	else if (*name == '@')	221
157	sv = (SV *) newAV ();	222	SvREFCNT_dec (*svp);
158	else if (*name == '%')
159	sv = (SV *) newHV ();
160	else
161	sv = NEWSV (0, 0);
162	if (!SvPADBUSY (sv))
163	SvPADMY_on (sv);
164	npad[ix] = sv;
165	}	223	}
166	}	224	}
167	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))	225
168	{	226	SvREFCNT_dec ((SV*)padlist);
169	npad[ix] = SvREFCNT_inc (ppad[ix]);
170	}
171	else
172	{
173	SV *sv = NEWSV (0, 0);
174	SvPADTMP_on (sv);
175	npad[ix] = sv;
176	}
177	}	227	}
		228	}
178		229
179	#if 0 /* return -ENOTUNDERSTOOD */	230	static int
180	/* Now that vars are all in place, clone nested closures. */	231	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		232	{
		233	AV *padlist;
		234	AV *av = (AV *)mg->mg_obj;
181		235
182	for (ix = fpad; ix > 0; ix--) {	236	/* casting is fun. */
183	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;	237	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
184	if (namesv	238	free_padlist (padlist);
185	&& namesv != &PL_sv_undef	239
186	&& !(SvFLAGS(namesv) & SVf_FAKE)	240	SvREFCNT_dec (av);
187	&& *SvPVX(namesv) == '&'	241
188	&& CvCLONE(ppad[ix]))	242	return 0;
189	{	243	}
190	CV *kid = cv_clone((CV*)ppad[ix]);	244
191	SvREFCNT_dec(ppad[ix]);	245	#define PERL_MAGIC_coro PERL_MAGIC_ext
192	CvCLONE_on(kid);	246
193	SvPADMY_on(kid);	247	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
194	npad[ix] = (SV*)kid;	248
195	}	249	/* the next two functions merely cache the padlists */
		250	static void
		251	get_padlist (CV *cv)
		252	{
		253	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		254
		255	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
		256	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
		257	else
		258	{
		259	#if 0
		260	/* this is probably cleaner, but also slower? */
		261	CV *cp = Perl_cv_clone (cv);
		262	CvPADLIST (cv) = CvPADLIST (cp);
		263	CvPADLIST (cp) = 0;
		264	SvREFCNT_dec (cp);
		265	#else
		266	CvPADLIST (cv) = coro_clone_padlist (cv);
		267	#endif
		268	}
		269	}
		270
		271	static void
		272	put_padlist (CV *cv)
		273	{
		274	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		275
		276	if (!mg)
		277	{
		278	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		279	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		280	mg->mg_virtual = &vtbl_coro;
		281	mg->mg_obj = (SV *)newAV ();
196	}	282	}
197	#endif
198		283
199	return newpadlist;
200	}
201
202	#ifdef MAY_FLUSH
203	STATIC void
204	free_padlist (AV *padlist)
205	{
206	/* may be during global destruction */
207	if (SvREFCNT(padlist))
208	{
209	I32 i = AvFILLp(padlist);
210	while (i >= 0)
211	{
212	SV **svp = av_fetch(padlist, i--, FALSE);
213	SV *sv = svp ? *svp : Nullsv;
214	if (sv)
215	SvREFCNT_dec(sv);
216	}
217
218	SvREFCNT_dec((SV*)padlist);
219	}
220	}
221	#endif
222
223	/* the next two functions merely cache the padlists */
224	STATIC void
225	get_padlist (CV *cv)
226	{
227	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);
228
229	if (he && AvFILLp ((AV *)*he) >= 0)
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);
231	else
232	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
233	}
234
235	STATIC void
236	put_padlist (CV *cv)
237	{
238	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
239
240	if (SvTYPE (*he) != SVt_PVAV)
241	{
242	SvREFCNT_dec (*he);
243	*he = (SV *)newAV ();
244	}
245
246	av_push ((AV *)*he, (SV *)CvPADLIST (cv));	284	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));
247	}	285	}
248
249	#ifdef MAY_FLUSH
250	STATIC void
251	flush_padlist_cache ()
252	{
253	HV *hv = padlist_cache;
254	padlist_cache = newHV ();
255
256	if (hv_iterinit (hv))
257	{
258	HE *he;
259	AV *padlist;
260
261	while (!!(he = hv_iternext (hv)))
262	{
263	AV *av = (AV *)HeVAL(he);
264
265	/* casting is fun. */
266	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
267	free_padlist (padlist);
268	}
269	}
270
271	SvREFCNT_dec (hv);
272	}
273	#endif
274		286
275	#define SB do {	287	#define SB do {
276	#define SE } while (0)	288	#define SE } while (0)
277		289
278	#define LOAD(state) load_state(aTHX_ (state));	290	#define LOAD(state) load_state((state));
279	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	291	#define SAVE(state,flags) save_state((state),(flags));
280		292
281	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	293	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
282		294
283	static void	295	static void
284	load_state(pTHX_ Coro__State c)	296	load_state(Coro__State c)
285	{	297	{
286	PL_dowarn = c->dowarn;	298	PL_dowarn = c->dowarn;
287	PL_in_eval = c->in_eval;	299	PL_in_eval = c->in_eval;
288		300
289	PL_curstackinfo = c->curstackinfo;	301	PL_curstackinfo = c->curstackinfo;
290	PL_curstack = c->curstack;	302	PL_curstack = c->curstack;
291	PL_mainstack = c->mainstack;	303	PL_mainstack = c->mainstack;
292	PL_stack_sp = c->stack_sp;	304	PL_stack_sp = c->stack_sp;
293	PL_op = c->op;	305	PL_op = c->op;
294	PL_curpad = c->curpad;	306	PL_curpad = c->curpad;
		307	PL_comppad = c->comppad;
		308	PL_compcv = c->compcv;
295	PL_stack_base = c->stack_base;	309	PL_stack_base = c->stack_base;
296	PL_stack_max = c->stack_max;	310	PL_stack_max = c->stack_max;
297	PL_tmps_stack = c->tmps_stack;	311	PL_tmps_stack = c->tmps_stack;
298	PL_tmps_floor = c->tmps_floor;	312	PL_tmps_floor = c->tmps_floor;
299	PL_tmps_ix = c->tmps_ix;	313	PL_tmps_ix = c->tmps_ix;
…		…
305	PL_scopestack_ix = c->scopestack_ix;	319	PL_scopestack_ix = c->scopestack_ix;
306	PL_scopestack_max = c->scopestack_max;	320	PL_scopestack_max = c->scopestack_max;
307	PL_savestack = c->savestack;	321	PL_savestack = c->savestack;
308	PL_savestack_ix = c->savestack_ix;	322	PL_savestack_ix = c->savestack_ix;
309	PL_savestack_max = c->savestack_max;	323	PL_savestack_max = c->savestack_max;
		324	#if !PERL_VERSION_ATLEAST (5,9,0)
310	PL_retstack = c->retstack;	325	PL_retstack = c->retstack;
311	PL_retstack_ix = c->retstack_ix;	326	PL_retstack_ix = c->retstack_ix;
312	PL_retstack_max = c->retstack_max;	327	PL_retstack_max = c->retstack_max;
		328	#endif
		329	PL_curpm = c->curpm;
313	PL_curcop = c->curcop;	330	PL_curcop = c->curcop;
314	PL_top_env = c->top_env;
315		331
316	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	332	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
317	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	333	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
318	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	334	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
319		335
…		…
328		344
329	if (padlist)	345	if (padlist)
330	{	346	{
331	put_padlist (cv); /* mark this padlist as available */	347	put_padlist (cv); /* mark this padlist as available */
332	CvPADLIST(cv) = padlist;	348	CvPADLIST(cv) = padlist;
333	#ifdef USE_THREADS
334	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
335	#endif
336	}	349	}
337		350
338	++CvDEPTH(cv);	351	++CvDEPTH(cv);
339	}	352	}
340		353
341	PUTBACK;	354	PUTBACK;
342	}	355	}
343	}	356	}
344		357
345	static void	358	static void
346	save_state(pTHX_ Coro__State c, int flags)	359	save_state(Coro__State c, int flags)
347	{	360	{
348	{	361	{
349	dSP;	362	dSP;
350	I32 cxix = cxstack_ix;	363	I32 cxix = cxstack_ix;
351	PERL_CONTEXT *ccstk = cxstack;	364	PERL_CONTEXT *ccstk = cxstack;
…		…
367	if (CxTYPE(cx) == CXt_SUB)	380	if (CxTYPE(cx) == CXt_SUB)
368	{	381	{
369	CV *cv = cx->blk_sub.cv;	382	CV *cv = cx->blk_sub.cv;
370	if (CvDEPTH(cv))	383	if (CvDEPTH(cv))
371	{	384	{
372	#ifdef USE_THREADS
373	/*XPUSHs ((SV *)CvOWNER(cv));*/
374	/*CvOWNER(cv) = 0;*/
375	/*error must unlock this cv etc.. etc...*/
376	#endif
377	EXTEND (SP, CvDEPTH(cv)*2);	385	EXTEND (SP, CvDEPTH(cv)*2);
378		386
379	while (--CvDEPTH(cv))	387	while (--CvDEPTH(cv))
380	{	388	{
381	/* this tells the restore code to increment CvDEPTH */	389	/* this tells the restore code to increment CvDEPTH */
…		…
384	}	392	}
385		393
386	PUSHs ((SV *)CvPADLIST(cv));	394	PUSHs ((SV *)CvPADLIST(cv));
387	PUSHs ((SV *)cv);	395	PUSHs ((SV *)cv);
388		396
389	get_padlist (cv); /* this is a monster */	397	get_padlist (cv);
390	}	398	}
391	}	399	}
		400	#ifdef CXt_FORMAT
392	else if (CxTYPE(cx) == CXt_FORMAT)	401	else if (CxTYPE(cx) == CXt_FORMAT)
393	{	402	{
394	/* I never used formats, so how should I know how these are implemented? */	403	/* I never used formats, so how should I know how these are implemented? */
395	/* my bold guess is as a simple, plain sub... */	404	/* my bold guess is as a simple, plain sub... */
396	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	405	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
397	}	406	}
		407	#endif
398	}	408	}
399		409
400	if (top_si->si_type == PERLSI_MAIN)	410	if (top_si->si_type == PERLSI_MAIN)
401	break;	411	break;
402		412
…		…
419	c->curstack = PL_curstack;	429	c->curstack = PL_curstack;
420	c->mainstack = PL_mainstack;	430	c->mainstack = PL_mainstack;
421	c->stack_sp = PL_stack_sp;	431	c->stack_sp = PL_stack_sp;
422	c->op = PL_op;	432	c->op = PL_op;
423	c->curpad = PL_curpad;	433	c->curpad = PL_curpad;
		434	c->comppad = PL_comppad;
		435	c->compcv = PL_compcv;
424	c->stack_base = PL_stack_base;	436	c->stack_base = PL_stack_base;
425	c->stack_max = PL_stack_max;	437	c->stack_max = PL_stack_max;
426	c->tmps_stack = PL_tmps_stack;	438	c->tmps_stack = PL_tmps_stack;
427	c->tmps_floor = PL_tmps_floor;	439	c->tmps_floor = PL_tmps_floor;
428	c->tmps_ix = PL_tmps_ix;	440	c->tmps_ix = PL_tmps_ix;
…		…
434	c->scopestack_ix = PL_scopestack_ix;	446	c->scopestack_ix = PL_scopestack_ix;
435	c->scopestack_max = PL_scopestack_max;	447	c->scopestack_max = PL_scopestack_max;
436	c->savestack = PL_savestack;	448	c->savestack = PL_savestack;
437	c->savestack_ix = PL_savestack_ix;	449	c->savestack_ix = PL_savestack_ix;
438	c->savestack_max = PL_savestack_max;	450	c->savestack_max = PL_savestack_max;
		451	#if !PERL_VERSION_ATLEAST (5,9,0)
439	c->retstack = PL_retstack;	452	c->retstack = PL_retstack;
440	c->retstack_ix = PL_retstack_ix;	453	c->retstack_ix = PL_retstack_ix;
441	c->retstack_max = PL_retstack_max;	454	c->retstack_max = PL_retstack_max;
		455	#endif
		456	c->curpm = PL_curpm;
442	c->curcop = PL_curcop;	457	c->curcop = PL_curcop;
443	c->top_env = PL_top_env;
444	}	458	}
445		459
446	/*	460	/*
447	* allocate various perl stacks. This is an exact copy	461	* allocate various perl stacks. This is an exact copy
448	* of perl.c:init_stacks, except that it uses less memory	462	* of perl.c:init_stacks, except that it uses less memory
449	* on the assumption that coroutines do not usually need	463	* on the (sometimes correct) assumption that coroutines do
450	* a lot of stackspace.	464	* not usually need a lot of stackspace.
451	*/	465	*/
452	STATIC void	466	static void
453	coro_init_stacks (pTHX)	467	coro_init_stacks ()
454	{	468	{
455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	469	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
456	PL_curstackinfo->si_type = PERLSI_MAIN;	470	PL_curstackinfo->si_type = PERLSI_MAIN;
457	PL_curstack = PL_curstackinfo->si_stack;	471	PL_curstack = PL_curstackinfo->si_stack;
458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	472	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
468		482
469	New(54,PL_markstack,16,I32);	483	New(54,PL_markstack,16,I32);
470	PL_markstack_ptr = PL_markstack;	484	PL_markstack_ptr = PL_markstack;
471	PL_markstack_max = PL_markstack + 16;	485	PL_markstack_max = PL_markstack + 16;
472		486
		487	#ifdef SET_MARK_OFFSET
473	SET_MARK_OFFSET;	488	SET_MARK_OFFSET;
		489	#endif
474		490
475	New(54,PL_scopestack,16,I32);	491	New(54,PL_scopestack,16,I32);
476	PL_scopestack_ix = 0;	492	PL_scopestack_ix = 0;
477	PL_scopestack_max = 16;	493	PL_scopestack_max = 16;
478		494
479	New(54,PL_savestack,96,ANY);	495	New(54,PL_savestack,96,ANY);
480	PL_savestack_ix = 0;	496	PL_savestack_ix = 0;
481	PL_savestack_max = 96;	497	PL_savestack_max = 96;
482		498
		499	#if !PERL_VERSION_ATLEAST (5,9,0)
483	New(54,PL_retstack,8,OP*);	500	New(54,PL_retstack,8,OP*);
484	PL_retstack_ix = 0;	501	PL_retstack_ix = 0;
485	PL_retstack_max = 8;	502	PL_retstack_max = 8;
		503	#endif
486	}	504	}
487		505
488	/*	506	/*
489	* destroy the stacks, the callchain etc...	507	* destroy the stacks, the callchain etc...
490	* still there is a memleak of 128 bytes...
491	*/	508	*/
492	STATIC void	509	static void
493	destroy_stacks(pTHX)	510	coro_destroy_stacks ()
494	{	511	{
495	if (!IN_DESTRUCT)	512	if (!IN_DESTRUCT)
496	{	513	{
497	/* is this ugly, I ask? */	514	/* is this ugly, I ask? */
498	while (PL_scopestack_ix)	515	LEAVE_SCOPE (0);
499	LEAVE;
500		516
501	/* sure it is, but more important: is it correct?? :/ */	517	/* sure it is, but more important: is it correct?? :/ */
502	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
503	FREETMPS;	518	FREETMPS;
		519
		520	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
504	}	521	}
505		522
506	while (PL_curstackinfo->si_next)	523	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;	524	PL_curstackinfo = PL_curstackinfo->si_next;
508		525
509	while (PL_curstackinfo)	526	while (PL_curstackinfo)
510	{	527	{
511	PERL_SI *p = PL_curstackinfo->si_prev;	528	PERL_SI *p = PL_curstackinfo->si_prev;
512		529
513	{	530	{ /*D*//*remove*/
514	dSP;	531	dSP;
515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	532	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516	PUTBACK; /* possibly superfluous */	533	PUTBACK; /* possibly superfluous */
517	}	534	}
518		535
519	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
520	{	537	{
521	dounwind(-1);	538	dounwind (-1);/*D*//*remove*/
522	SvREFCNT_dec(PL_curstackinfo->si_stack);	539	SvREFCNT_dec (PL_curstackinfo->si_stack);
523	}	540	}
524		541
525	Safefree(PL_curstackinfo->si_cxstack);	542	Safefree (PL_curstackinfo->si_cxstack);
526	Safefree(PL_curstackinfo);	543	Safefree (PL_curstackinfo);
527	PL_curstackinfo = p;	544	PL_curstackinfo = p;
528	}	545	}
529		546
530	Safefree(PL_tmps_stack);	547	Safefree (PL_tmps_stack);
531	Safefree(PL_markstack);	548	Safefree (PL_markstack);
532	Safefree(PL_scopestack);	549	Safefree (PL_scopestack);
533	Safefree(PL_savestack);	550	Safefree (PL_savestack);
		551	#if !PERL_VERSION_ATLEAST (5,9,0)
534	Safefree(PL_retstack);	552	Safefree (PL_retstack);
535	}
536
537	static void
538	allocate_stack (Coro__State ctx, int alloc)
539	{
540	coro_stack *stack;
541
542	New (0, stack, 1, coro_stack);
543
544	stack->refcnt = 1;
545	stack->usecnt = 1;
546	stack->gencnt = ctx->gencnt = 0;
547	if (alloc)
548	{
549	#if HAVE_MMAP
550	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
551	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
552	if (stack->sptr == (void *)-1)
553	#endif	553	#endif
554	{
555	/*FIXME*//*D*//* reasonable stack size! */
556	stack->ssize = -4096 * sizeof (long);
557	New (0, stack->sptr, 4096, long);
558	}
559	}
560	else
561	stack->sptr = 0;
562
563	ctx->stack = stack;
564	}	554	}
565		555
566	static void	556	static void
567	deallocate_stack (Coro__State ctx)	557	setup_coro (struct coro *coro)
568	{
569	coro_stack *stack = ctx->stack;
570
571	ctx->stack = 0;
572
573	if (stack)
574	{
575	if (!--stack->refcnt)
576	{
577	#ifdef HAVE_MMAP
578	if (stack->ssize > 0 && stack->sptr)
579	munmap (stack->sptr, stack->ssize);
580	else
581	#else
582	Safefree (stack->sptr);
583	#endif
584	Safefree (stack);
585	}
586	else if (ctx->gencnt == stack->gencnt)
587	--stack->usecnt;
588	}
589	}
590
591	static void
592	setup_coro (void *arg)
593	{	558	{
594	/*	559	/*
595	* emulate part of the perl startup here.	560	* emulate part of the perl startup here.
596	*/	561	*/
		562
		563	coro_init_stacks ();
		564
		565	PL_curcop = 0;
		566	PL_in_eval = 0;
		567	PL_curpm = 0;
		568
		569	{
		570	dSP;
		571	LOGOP myop;
		572
		573	/* I have no idea why this is needed, but it is */
		574	PUSHMARK (SP);
		575
		576	SvREFCNT_dec (GvAV (PL_defgv));
		577	GvAV (PL_defgv) = coro->args; coro->args = 0;
		578
		579	Zero (&myop, 1, LOGOP);
		580	myop.op_next = Nullop;
		581	myop.op_flags = OPf_WANT_VOID;
		582
		583	PL_op = (OP *)&myop;
		584
		585	PUSHMARK (SP);
		586	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		587	PUTBACK;
		588	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		589	SPAGAIN;
		590
		591	ENTER; /* necessary e.g. for dounwind */
		592	}
		593	}
		594
		595	static void
		596	free_coro_mortal ()
		597	{
		598	if (coro_mortal)
		599	{
		600	SvREFCNT_dec (coro_mortal);
		601	coro_mortal = 0;
		602	}
		603	}
		604
		605	static void NOINLINE
		606	prepare_cctx (coro_cctx *cctx)
		607	{
597	dSP;	608	dSP;
598	Coro__State ctx = (Coro__State)arg;	609	LOGOP myop;
599	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
600		610
601	coro_init_stacks (aTHX);	611	Zero (&myop, 1, LOGOP);
602	/*PL_curcop = 0;*/	612	myop.op_next = PL_op;
603	/*PL_in_eval = PL_in_eval;*/ /* inherit */	613	myop.op_flags = OPf_WANT_VOID;
604	SvREFCNT_dec (GvAV (PL_defgv));
605	GvAV (PL_defgv) = ctx->args;
606		614
		615	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		616
		617	PUSHMARK (SP);
		618	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		619	PUTBACK;
		620	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
607	SPAGAIN;	621	SPAGAIN;
608
609	if (ctx->stack)
610	{
611	ctx->cursp = 0;
612
613	PUSHMARK(SP);
614	PUTBACK;
615	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
616
617	if (SvTRUE (ERRSV))
618	croak (NULL);
619	else
620	croak ("FATAL: CCTXT coroutine returned!");
621	}
622	else
623	{
624	UNOP myop;
625
626	PL_op = (OP *)&myop;
627
628	Zero(&myop, 1, UNOP);
629	myop.op_next = Nullop;
630	myop.op_flags = OPf_WANT_VOID;
631
632	PUSHMARK(SP);
633	XPUSHs (sub_init);
634	/*
635	* the next line is slightly wrong, as PL_op->op_next
636	* is actually being executed so we skip the first op.
637	* that doesn't matter, though, since it is only
638	* pp_nextstate and we never return...
639	* ah yes, and I don't care anyways ;)
640	*/
641	PUTBACK;
642	PL_op = pp_entersub();
643	SPAGAIN;
644
645	ENTER; /* necessary e.g. for dounwind */
646	}
647	}	622	}
648		623
649	static void	624	static void
650	continue_coro (void *arg)	625	coro_run (void *arg)
651	{	626	{
		627	/* coro_run is the alternative epilogue of transfer() */
		628	UNLOCK;
		629
652	/*	630	/*
653	* this is a _very_ stripped down perl interpreter ;)	631	* this is a _very_ stripped down perl interpreter ;)
654	*/	632	*/
655	Coro__State ctx = (Coro__State)arg;
656	JMPENV coro_start_env;
657
658	/* same as JMPENV_BOOTSTRAP */
659	Zero(&coro_start_env, 1, JMPENV);
660	coro_start_env.je_ret = -1;
661	coro_start_env.je_mustcatch = TRUE;
662	PL_top_env = &coro_start_env;	633	PL_top_env = &PL_start_env;
663		634
664	ctx->cursp = 0;	635	/* inject call to cctx_init */
665	PL_op = PL_op->op_next;	636	prepare_cctx ((coro_cctx *)arg);
666	CALLRUNOPS(aTHX);
667		637
		638	/* somebody will hit me for both perl_run and PL_restartop */
		639	perl_run (PL_curinterp);
		640
		641	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
668	abort ();	642	abort ();
669	}	643	}
670		644
671	STATIC void	645	static coro_cctx *
		646	cctx_new ()
		647	{
		648	coro_cctx *cctx;
		649
		650	++cctx_count;
		651
		652	New (0, cctx, 1, coro_cctx);
		653
		654	#if HAVE_MMAP
		655
		656	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		657	/* mmap suppsedly does allocate-on-write for us */
		658	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		659
		660	if (cctx->sptr == (void *)-1)
		661	{
		662	perror ("FATAL: unable to mmap stack for coroutine");
		663	_exit (EXIT_FAILURE);
		664	}
		665
		666	# if STACKGUARD
		667	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		668	# endif
		669
		670	#else
		671
		672	cctx->ssize = STACKSIZE * (long)sizeof (long);
		673	New (0, cctx->sptr, STACKSIZE, long);
		674
		675	if (!cctx->sptr)
		676	{
		677	perror ("FATAL: unable to malloc stack for coroutine");
		678	_exit (EXIT_FAILURE);
		679	}
		680
		681	#endif
		682
		683	#if USE_VALGRIND
		684	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		685	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		686	cctx->ssize + (char *)cctx->sptr
		687	);
		688	#endif
		689
		690	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		691
		692	return cctx;
		693	}
		694
		695	static void
		696	cctx_free (coro_cctx *cctx)
		697	{
		698	if (!cctx)
		699	return;
		700
		701	--cctx_count;
		702
		703	#if USE_VALGRIND
		704	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		705	#endif
		706
		707	#if HAVE_MMAP
		708	munmap (cctx->sptr, cctx->ssize);
		709	#else
		710	Safefree (cctx->sptr);
		711	#endif
		712
		713	Safefree (cctx);
		714	}
		715
		716	static coro_cctx *
		717	cctx_get ()
		718	{
		719	coro_cctx *cctx;
		720
		721	if (cctx_first)
		722	{
		723	--cctx_idle;
		724	cctx = cctx_first;
		725	cctx_first = cctx->next;
		726	}
		727	else
		728	{
		729	cctx = cctx_new ();
		730	PL_op = PL_op->op_next;
		731	}
		732
		733	return cctx;
		734	}
		735
		736	static void
		737	cctx_put (coro_cctx *cctx)
		738	{
		739	++cctx_idle;
		740	cctx->next = cctx_first;
		741	cctx_first = cctx;
		742	}
		743
		744	/* never call directly, always through the coro_state_transfer global variable */
		745	static void NOINLINE
672	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	746	transfer (struct coro *prev, struct coro *next, int flags)
673	{	747	{
674	dSTACKLEVEL;	748	dSTACKLEVEL;
675	static struct coro *xnext;
676		749
		750	/* sometimes transfer is only called to set idle_sp */
		751	if (flags == TRANSFER_SET_STACKLEVEL)
		752	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
677	if (prev != next)	753	else if (prev != next)
678	{	754	{
679	xnext = next;	755	coro_cctx *prev__cctx;
		756
		757	LOCK;
680		758
681	if (next->mainstack)	759	if (next->mainstack)
682	{	760	{
		761	/* coroutine already started */
683	SAVE (prev, flags);	762	SAVE (prev, flags);
684	LOAD (next);	763	LOAD (next);
685
686	/* mark this state as in-use */
687	next->mainstack = 0;
688	next->tmps_ix = -2;
689
690	/* stacklevel changed? if yes, grab the stack for us! */
691	if (flags & TRANSFER_SAVE_CCTXT)
692	{
693	if (!prev->stack)
694	allocate_stack (prev, 0);
695	else if (prev->cursp != stacklevel
696	&& prev->stack->usecnt > 1)
697	{
698	prev->gencnt = ++prev->stack->gencnt;
699	prev->stack->usecnt = 1;
700	}
701
702	/* has our stack been invalidated? */
703	if (next->stack && next->stack->gencnt != next->gencnt)
704	{
705	deallocate_stack (next);
706	allocate_stack (next, 1);
707	coro_create (&(next->stack->cctx),
708	continue_coro, (void *)next,
709	next->stack->sptr, labs (next->stack->ssize));
710	}
711
712	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
713	/* don't add any code here */
714	}
715
716	}	764	}
717	else if (next->tmps_ix == -2)
718	croak ("tried to transfer to running coroutine");
719	else	765	else
720	{	766	{
		767	/* need to start coroutine */
721	SAVE (prev, -1); /* first get rid of the old state */	768	/* first get rid of the old state */
722		769	SAVE (prev, -1);
723	if (flags & TRANSFER_SAVE_CCTXT)	770	/* setup coroutine call */
724	{
725	if (!prev->stack)
726	allocate_stack (prev, 0);
727
728	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
729	{
730	setup_coro (next);
731
732	prev->stack->refcnt++;
733	prev->stack->usecnt++;
734	next->stack = prev->stack;
735	next->gencnt = prev->gencnt;
736	}
737	else
738	{
739	allocate_stack (next, 1);
740	coro_create (&(next->stack->cctx),
741	setup_coro, (void *)next,
742	next->stack->sptr, labs (next->stack->ssize));
743	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
744	/* don't add any code here */
745	}
746	}
747	else
748	setup_coro (next);	771	setup_coro (next);
		772	/* need a stack */
		773	next->cctx = 0;
749	}	774	}
750		775
751	/*	776	if (!prev->cctx)
752	* xnext is now either prev or next, depending on wether	777	/* create a new empty context */
753	* we switched the c stack or not. that's why i use a global	778	Newz (0, prev->cctx, 1, coro_cctx);
754	* variable, that should become thread-specific at one point.	779
		780	prev__cctx = prev->cctx;
		781
		782	/* possibly "free" the cctx */
		783	if (prev__cctx->idle_sp == STACKLEVEL)
755	*/	784	{
756	xnext->cursp = stacklevel;	785	cctx_put (prev__cctx);
		786	prev->cctx = 0;
		787	}
		788
		789	if (!next->cctx)
		790	next->cctx = cctx_get ();
		791
		792	if (prev__cctx != next->cctx)
		793	{
		794	prev__cctx->top_env = PL_top_env;
		795	PL_top_env = next->cctx->top_env;
		796	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		797	}
		798
		799	free_coro_mortal ();
		800
		801	UNLOCK;
757	}	802	}
758	}	803	}
759		804
		805	struct transfer_args
		806	{
		807	struct coro *prev, *next;
		808	int flags;
		809	};
		810
		811	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		812
		813	static void
		814	coro_state_destroy (struct coro *coro)
		815	{
		816	if (coro->refcnt--)
		817	return;
		818
		819	if (coro->mainstack && coro->mainstack != main_mainstack)
		820	{
		821	struct coro temp;
		822
		823	SAVE ((&temp), TRANSFER_SAVE_ALL);
		824	LOAD (coro);
		825
		826	coro_destroy_stacks ();
		827
		828	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		829
		830	coro->mainstack = 0;
		831	}
		832
		833	cctx_free (coro->cctx);
		834	SvREFCNT_dec (coro->args);
		835	Safefree (coro);
		836	}
		837
		838	static int
		839	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		840	{
		841	struct coro *coro = (struct coro *)mg->mg_ptr;
		842	mg->mg_ptr = 0;
		843
		844	coro_state_destroy (coro);
		845
		846	return 0;
		847	}
		848
		849	static int
		850	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		851	{
		852	struct coro *coro = (struct coro *)mg->mg_ptr;
		853
		854	++coro->refcnt;
		855
		856	return 0;
		857	}
		858
		859	static MGVTBL coro_state_vtbl = {
		860	0, 0, 0, 0,
		861	coro_state_clear,
		862	0,
		863	#ifdef MGf_DUP
		864	coro_state_dup,
		865	#else
		866	# define MGf_DUP 0
		867	#endif
		868	};
		869
760	static struct coro *	870	static struct coro *
761	sv_to_coro (SV *arg, const char *funcname, const char *varname)	871	SvSTATE (SV *coro)
762	{	872	{
763	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	873	HV *stash;
		874	MAGIC *mg;
		875
		876	if (SvROK (coro))
		877	coro = SvRV (coro);
		878
		879	stash = SvSTASH (coro);
		880	if (stash != coro_stash && stash != coro_state_stash)
764	{	881	{
765	HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);	882	/* very slow, but rare, check */
766		883	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
767	if (!he)	884	croak ("Coro::State object required");
768	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
769
770	arg = HeVAL(he);
771	}	885	}
772
773	/* must also be changed inside Coro::Cont::yield */
774	if (SvROK(arg) && SvOBJECT(SvRV(arg))
775	&& SvSTASH(SvRV(arg)) == coro_state_stash)
776	return (struct coro *) SvIV((SV*)SvRV(arg));
777		886
778	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	887	mg = SvMAGIC (coro);
779	/*NORETURN*/	888	assert (mg->mg_type == PERL_MAGIC_ext);
		889	return (struct coro *)mg->mg_ptr;
780	}	890	}
781		891
782	static void	892	static void
		893	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		894	{
		895	ta->prev = SvSTATE (prev);
		896	ta->next = SvSTATE (next);
		897	ta->flags = flags;
		898	}
		899
		900	static void
783	api_transfer(pTHX_ SV *prev, SV *next, int flags)	901	api_transfer (SV *prev, SV *next, int flags)
784	{	902	{
785	transfer(aTHX_	903	dTHX;
786	sv_to_coro (prev, "Coro::transfer", "prev"),	904	struct transfer_args ta;
787	sv_to_coro (next, "Coro::transfer", "next"),	905
788	flags);	906	prepare_transfer (&ta, prev, next, flags);
		907	TRANSFER (ta);
789	}	908	}
790		909
791	/** Coro ********************************************************************/	910	/** Coro ********************************************************************/
792		911
793	#define PRIO_MAX 3	912	#define PRIO_MAX 3
…		…
797	#define PRIO_IDLE -3	916	#define PRIO_IDLE -3
798	#define PRIO_MIN -4	917	#define PRIO_MIN -4
799		918
800	/* for Coro.pm */	919	/* for Coro.pm */
801	static GV *coro_current, *coro_idle;	920	static GV *coro_current, *coro_idle;
802	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	921	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
803	static int coro_nready;	922	static int coro_nready;
804		923
805	static void	924	static void
806	coro_enq (SV *sv)	925	coro_enq (SV *sv)
807	{	926	{
808	if (SvROK (sv))	927	int prio;
809	{	928
810	SV *hv = SvRV (sv);
811	if (SvTYPE (hv) == SVt_PVHV)	929	if (SvTYPE (sv) != SVt_PVHV)
812	{
813	SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0);
814	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
815
816	prio = prio > PRIO_MAX ? PRIO_MAX
817	: prio < PRIO_MIN ? PRIO_MIN
818	: prio;
819
820	av_push (coro_ready [prio - PRIO_MIN], sv);
821	coro_nready++;
822
823	return;
824	}
825	}
826
827	croak ("Coro::ready tried to enqueue something that is not a coroutine");	930	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		931
		932	prio = SvSTATE (sv)->prio;
		933
		934	av_push (coro_ready [prio - PRIO_MIN], sv);
		935	coro_nready++;
828	}	936	}
829		937
830	static SV *	938	static SV *
831	coro_deq (int min_prio)	939	coro_deq (int min_prio)
832	{	940	{
…		…
835	min_prio -= PRIO_MIN;	943	min_prio -= PRIO_MIN;
836	if (min_prio < 0)	944	if (min_prio < 0)
837	min_prio = 0;	945	min_prio = 0;
838		946
839	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	947	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
840	if (av_len (coro_ready[prio]) >= 0)	948	if (AvFILLp (coro_ready [prio]) >= 0)
841	{	949	{
842	coro_nready--;	950	coro_nready--;
843	return av_shift (coro_ready[prio]);	951	return av_shift (coro_ready [prio]);
844	}	952	}
845		953
846	return 0;	954	return 0;
847	}	955	}
848		956
849	static void	957	static void
850	api_ready (SV *coro)	958	api_ready (SV *coro)
851	{	959	{
		960	dTHX;
		961
		962	if (SvROK (coro))
		963	coro = SvRV (coro);
		964
		965	LOCK;
852	coro_enq (SvREFCNT_inc (coro));	966	coro_enq (SvREFCNT_inc (coro));
		967	UNLOCK;
853	}	968	}
854		969
855	static void	970	static void
856	api_schedule (int cede)	971	prepare_schedule (struct transfer_args *ta)
857	{	972	{
858	SV *prev, *next;	973	SV *current, *prev, *next;
859		974
860	prev = GvSV (coro_current);	975	current = GvSV (coro_current);
861		976
862	if (cede)	977	for (;;)
863	coro_enq (SvREFCNT_inc (prev));	978	{
864		979	LOCK;
865	next = coro_deq (PRIO_MIN);	980	next = coro_deq (PRIO_MIN);
		981	UNLOCK;
866		982
867	if (!next)	983	if (next)
868	next = SvREFCNT_inc (GvSV (coro_idle));	984	break;
869		985
870	GvSV (coro_current) = SvREFCNT_inc (next);	986	{
871	transfer (aTHX_	987	dSP;
872	sv_to_coro (prev, "Coro::schedule", "current coroutine"),	988
873	sv_to_coro (next, "Coro::schedule", "next coroutine"),	989	ENTER;
874	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);	990	SAVETMPS;
875	SvREFCNT_dec (next);	991
876	SvREFCNT_dec (prev);	992	PUSHMARK (SP);
		993	PUTBACK;
		994	call_sv (GvSV (coro_idle), G_DISCARD);
		995
		996	FREETMPS;
		997	LEAVE;
		998	}
		999	}
		1000
		1001	prev = SvRV (current);
		1002	SvRV (current) = next;
		1003
		1004	/* free this only after the transfer */
		1005	LOCK;
		1006	free_coro_mortal ();
		1007	UNLOCK;
		1008	coro_mortal = prev;
		1009
		1010	ta->prev = SvSTATE (prev);
		1011	ta->next = SvSTATE (next);
		1012	ta->flags = TRANSFER_SAVE_ALL;
		1013	}
		1014
		1015	static void
		1016	prepare_cede (struct transfer_args *ta)
		1017	{
		1018	LOCK;
		1019	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		1020	UNLOCK;
		1021
		1022	prepare_schedule (ta);
		1023	}
		1024
		1025	static void
		1026	api_schedule (void)
		1027	{
		1028	dTHX;
		1029	struct transfer_args ta;
		1030
		1031	prepare_schedule (&ta);
		1032	TRANSFER (ta);
		1033	}
		1034
		1035	static void
		1036	api_cede (void)
		1037	{
		1038	dTHX;
		1039	struct transfer_args ta;
		1040
		1041	prepare_cede (&ta);
		1042	TRANSFER (ta);
877	}	1043	}
878		1044
879	MODULE = Coro::State PACKAGE = Coro::State	1045	MODULE = Coro::State PACKAGE = Coro::State
880		1046
881	PROTOTYPES: ENABLE	1047	PROTOTYPES: DISABLE
882		1048
883	BOOT:	1049	BOOT:
884	{ /* {} necessary for stoopid perl-5.6.x */	1050	{
885	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1051	#ifdef USE_ITHREADS
886	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1052	MUTEX_INIT (&coro_mutex);
		1053	#endif
		1054	BOOT_PAGESIZE;
		1055
887	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1056	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
888		1057
889	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1058	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
890	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1059	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
891	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1060	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
892	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
893
894	if (!padlist_cache)
895	padlist_cache = newHV ();
896		1061
897	main_mainstack = PL_mainstack;	1062	main_mainstack = PL_mainstack;
898		1063
899	coroapi.ver = CORO_API_VERSION;	1064	coroapi.ver = CORO_API_VERSION;
900	coroapi.transfer = api_transfer;	1065	coroapi.transfer = api_transfer;
901	}
902		1066
903	Coro::State	1067	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
904	_newprocess(args)	1068	}
905	SV * args	1069
906	PROTOTYPE: $	1070	SV *
		1071	new (char *klass, ...)
907	CODE:	1072	CODE:
908	Coro__State coro;	1073	{
		1074	struct coro *coro;
		1075	HV *hv;
		1076	int i;
909		1077
910	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
911	croak ("Coro::State::_newprocess expects an arrayref");
912
913	New (0, coro, 1, struct coro);	1078	Newz (0, coro, 1, struct coro);
		1079	coro->args = newAV ();
914		1080
915	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1081	hv = newHV ();
916	coro->mainstack = 0; /* actual work is done inside transfer */	1082	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
917	coro->stack = 0;	1083	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
918		1084
919	RETVAL = coro;	1085	for (i = 1; i < items; i++)
		1086	av_push (coro->args, newSVsv (ST (i)));
		1087	}
920	OUTPUT:	1088	OUTPUT:
921	RETVAL	1089	RETVAL
922		1090
923	void	1091	void
924	transfer(prev, next, flags)	1092	_set_stacklevel (...)
925	Coro::State_or_hashref prev	1093	ALIAS:
926	Coro::State_or_hashref next	1094	Coro::State::transfer = 1
927	int flags	1095	Coro::schedule = 2
928	PROTOTYPE: @	1096	Coro::cede = 3
		1097	Coro::Cont::yield = 4
929	CODE:	1098	CODE:
930	PUTBACK;	1099	{
931	transfer (aTHX_ prev, next, flags);	1100	struct transfer_args ta;
932	SPAGAIN;	1101
		1102	switch (ix)
		1103	{
		1104	case 0:
		1105	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1106	ta.next = 0;
		1107	ta.flags = TRANSFER_SET_STACKLEVEL;
		1108	break;
		1109
		1110	case 1:
		1111	if (items != 3)
		1112	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1113
		1114	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1115	break;
		1116
		1117	case 2:
		1118	prepare_schedule (&ta);
		1119	break;
		1120
		1121	case 3:
		1122	prepare_cede (&ta);
		1123	break;
		1124
		1125	case 4:
		1126	{
		1127	SV *yieldstack;
		1128	SV *sv;
		1129	AV *defav = GvAV (PL_defgv);
		1130
		1131	yieldstack = *hv_fetch (
		1132	(HV *)SvRV (GvSV (coro_current)),
		1133	"yieldstack", sizeof ("yieldstack") - 1,
		1134	0
		1135	);
		1136
		1137	/* set up @_ -- ugly */
		1138	av_clear (defav);
		1139	av_fill (defav, items - 1);
		1140	while (items--)
		1141	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1142
		1143	sv = av_pop ((AV *)SvRV (yieldstack));
		1144	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1145	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1146	ta.flags = 0;
		1147	SvREFCNT_dec (sv);
		1148	}
		1149	break;
		1150
		1151	}
		1152
		1153	TRANSFER (ta);
		1154	}
933		1155
934	void	1156	void
935	DESTROY(coro)	1157	_clone_state_from (SV *dst, SV *src)
936	Coro::State coro	1158	CODE:
937	CODE:	1159	{
		1160	struct coro *coro_src = SvSTATE (src);
938		1161
939	if (coro->mainstack && coro->mainstack != main_mainstack)	1162	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
940	{
941	struct coro temp;
942		1163
943	PUTBACK;	1164	++coro_src->refcnt;
944	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1165	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
945	LOAD(aTHX_ coro);	1166	}
946	SPAGAIN;
947
948	destroy_stacks (aTHX);
949
950	LOAD((&temp)); /* this will get rid of defsv etc.. */
951	SPAGAIN;
952
953	coro->mainstack = 0;
954	}
955
956	deallocate_stack (coro);
957
958	Safefree (coro);
959		1167
960	void	1168	void
961	flush()
962	CODE:
963	#ifdef MAY_FLUSH
964	flush_padlist_cache ();
965	#endif
966
967	void
968	_exit(code)	1169	_exit (code)
969	int code	1170	int code
970	PROTOTYPE: $	1171	PROTOTYPE: $
971	CODE:	1172	CODE:
972	#if defined(__GLIBC__) || _POSIX_C_SOURCE
973	_exit (code);	1173	_exit (code);
974	#else
975	signal (SIGTERM, SIG_DFL);
976	raise (SIGTERM);
977	exit (code);
978	#endif
979		1174
980	MODULE = Coro::State PACKAGE = Coro::Cont	1175	int
		1176	cctx_count ()
		1177	CODE:
		1178	RETVAL = cctx_count;
		1179	OUTPUT:
		1180	RETVAL
981		1181
982	# this is slightly dirty (should expose a c-level api)	1182	int
983		1183	cctx_idle ()
984	void	1184	CODE:
985	yield(...)	1185	RETVAL = cctx_idle;
986	PROTOTYPE: @	1186	OUTPUT:
987	CODE:	1187	RETVAL
988	static SV *returnstk;
989	SV *sv;
990	AV *defav = GvAV (PL_defgv);
991	struct coro *prev, *next;
992
993	if (!returnstk)
994	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
995
996	/* set up @_ -- ugly */
997	av_clear (defav);
998	av_fill (defav, items - 1);
999	while (items--)
1000	av_store (defav, items, SvREFCNT_inc (ST(items)));
1001
1002	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1003	sv = av_pop ((AV *)SvRV (returnstk));
1004	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1005	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1006	SvREFCNT_dec (sv);
1007
1008	transfer(aTHX_ prev, next, 0);
1009		1188
1010	MODULE = Coro::State PACKAGE = Coro	1189	MODULE = Coro::State PACKAGE = Coro
1011		1190
1012	# this is slightly dirty (should expose a c-level api)
1013
1014	BOOT:	1191	BOOT:
1015	{	1192	{
1016	int i;	1193	int i;
		1194
1017	HV *stash = gv_stashpv ("Coro", TRUE);	1195	coro_stash = gv_stashpv ("Coro", TRUE);
1018		1196
1019	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1197	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1020	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1198	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1021	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1199	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1022	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1200	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1023	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1201	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1024	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1202	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1025		1203
1026	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1204	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1027	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1205	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1028		1206
1029	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1207	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1031		1209
1032	{	1210	{
1033	SV *sv = perl_get_sv("Coro::API", 1);	1211	SV *sv = perl_get_sv("Coro::API", 1);
1034		1212
1035	coroapi.schedule = api_schedule;	1213	coroapi.schedule = api_schedule;
		1214	coroapi.cede = api_cede;
1036	coroapi.ready = api_ready;	1215	coroapi.ready = api_ready;
1037	coroapi.nready = &coro_nready;	1216	coroapi.nready = &coro_nready;
1038	coroapi.current = coro_current;	1217	coroapi.current = coro_current;
1039		1218
1040	GCoroAPI = &coroapi;	1219	GCoroAPI = &coroapi;
1041	sv_setiv(sv, (IV)&coroapi);	1220	sv_setiv (sv, (IV)&coroapi);
1042	SvREADONLY_on(sv);	1221	SvREADONLY_on (sv);
1043	}	1222	}
1044	}	1223	}
1045		1224
		1225	int
		1226	prio (Coro::State coro, int newprio = 0)
		1227	ALIAS:
		1228	nice = 1
		1229	CODE:
		1230	{
		1231	RETVAL = coro->prio;
		1232
		1233	if (items > 1)
		1234	{
		1235	if (ix)
		1236	newprio += coro->prio;
		1237
		1238	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1239	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1240
		1241	coro->prio = newprio;
		1242	}
		1243	}
		1244
1046	void	1245	void
1047	ready(self)	1246	ready (SV *self)
1048	SV * self
1049	PROTOTYPE: $	1247	PROTOTYPE: $
1050	CODE:	1248	CODE:
1051	api_ready (self);	1249	api_ready (self);
1052		1250
1053	int	1251	int
1054	nready(...)	1252	nready (...)
1055	PROTOTYPE:	1253	PROTOTYPE:
1056	CODE:	1254	CODE:
1057	RETVAL = coro_nready;	1255	RETVAL = coro_nready;
1058	OUTPUT:	1256	OUTPUT:
1059	RETVAL	1257	RETVAL
1060		1258
		1259	MODULE = Coro::State PACKAGE = Coro::AIO
		1260
		1261	SV *
		1262	_get_state ()
		1263	CODE:
		1264	{
		1265	struct {
		1266	int errorno;
		1267	int laststype;
		1268	int laststatval;
		1269	Stat_t statcache;
		1270	} data;
		1271
		1272	data.errorno = errno;
		1273	data.laststype = PL_laststype;
		1274	data.laststatval = PL_laststatval;
		1275	data.statcache = PL_statcache;
		1276
		1277	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1278	}
		1279	OUTPUT:
		1280	RETVAL
		1281
1061	void	1282	void
1062	schedule(...)	1283	_set_state (char *data_)
1063	PROTOTYPE:	1284	PROTOTYPE: $
1064	ALIAS:
1065	cede = 1
1066	CODE:	1285	CODE:
1067	api_schedule (ix);	1286	{
		1287	struct {
		1288	int errorno;
		1289	int laststype;
		1290	int laststatval;
		1291	Stat_t statcache;
		1292	} *data = (void *)data_;
1068		1293
		1294	errno = data->errorno;
		1295	PL_laststype = data->laststype;
		1296	PL_laststatval = data->laststatval;
		1297	PL_statcache = data->statcache;
		1298	}

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