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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.54 by pcg, Sat Mar 13 06:45:04 2004 UTC vs.
Revision 1.114 by root, Thu Nov 30 21:22:45 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 "patchlevel.h"	7	#include "patchlevel.h"
6		8
7	#if PATCHLEVEL < 6	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)
8	# ifndef PL_ppaddr	20	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	21	# define PL_ppaddr ppaddr
10	# endif	22	# endif
11	# ifndef call_sv	23	# ifndef call_sv
12	# define call_sv perl_call_sv	24	# define call_sv perl_call_sv
…		…
23	# ifndef IS_PADCONST	35	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	36	# define IS_PADCONST(v) 0
25	# endif	37	# endif
26	#endif	38	#endif
27		39
28	#include "libcoro/coro.c"
29
30	#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
31		50
32	#ifdef HAVE_MMAP	51	#ifdef HAVE_MMAP
33	# include <unistd.h>	52	# include <unistd.h>
34	# include <sys/mman.h>	53	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
…		…
37	# define MAP_ANONYMOUS MAP_ANON	56	# define MAP_ANONYMOUS MAP_ANON
38	# else	57	# else
39	# undef HAVE_MMAP	58	# undef HAVE_MMAP
40	# endif	59	# endif
41	# 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
42	#endif	68	# endif
43		69	#else
44	#define SUB_INIT "Coro::State::initialize"	70	# define PAGESIZE 0
45	#define UCORO_STATE "_coro_state"	71	# define BOOT_PAGESIZE (void)0
		72	#endif
46		73
47	/* 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
48	* 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
49	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
50	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
51		79
52	#define IN_DESTRUCT (PL_main_cv == Nullcv)	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
53		81
54	#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))
55		89
56	#include "CoroAPI.h"	90	#include "CoroAPI.h"
57		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
58	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 */
59		107
60	/* 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 */
61	typedef struct {	112	typedef struct coro_cctx {
62	int refcnt; /* pointer reference counter */	113	struct coro_cctx *next;
63	int usecnt; /* shared by how many coroutines */
64	int gencnt; /* generation counter */
65		114
66	coro_context cctx;	115	/* the stack */
67
68	void *sptr;	116	void *sptr;
69	long ssize; /* positive == mmap, otherwise malloc */	117	long ssize; /* positive == mmap, otherwise malloc */
70	} coro_stack;
71		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	int inuse;
		125
		126	#if USE_VALGRIND
		127	int valgrind_id;
		128	#endif
		129	} coro_cctx;
		130
		131	enum {
		132	CF_RUNNING, /* coroutine is running */
		133	CF_READY, /* coroutine is ready */
		134	};
		135
		136	/* this is a structure representing a perl-level coroutine */
72	struct coro {	137	struct coro {
73	/* the top-level JMPENV for each coroutine, needed to catch dies. */	138	/* the c coroutine allocated to this perl coroutine, if any */
74	JMPENV start_env;	139	coro_cctx *cctx;
75		140
76	/* the optional C context */	141	/* data associated with this coroutine (initial args) */
77	coro_stack *stack;	142	AV *args;
78	void *cursp;
79	int gencnt;	143	int refcnt;
		144	int flags;
80		145
81	/* optionally saved, might be zero */	146	/* optionally saved, might be zero */
82	AV *defav;	147	AV *defav;
83	SV *defsv;	148	SV *defsv;
84	SV *errsv;	149	SV *errsv;
85		150
86	/* saved global state not related to stacks */	151	#define VAR(name,type) type name;
87	U8 dowarn;	152	# include "state.h"
88	I32 in_eval;	153	#undef VAR
89		154
90	/* the stacks and related info (callchain etc..) */	155	/* coro process data */
91	PERL_SI *curstackinfo;	156	int prio;
92	AV *curstack;
93	AV *mainstack;
94	SV **stack_sp;
95	OP *op;
96	SV **curpad;
97	AV *comppad;
98	SV **stack_base;
99	SV **stack_max;
100	SV **tmps_stack;
101	I32 tmps_floor;
102	I32 tmps_ix;
103	I32 tmps_max;
104	I32 *markstack;
105	I32 *markstack_ptr;
106	I32 *markstack_max;
107	I32 *scopestack;
108	I32 scopestack_ix;
109	I32 scopestack_max;
110	ANY *savestack;
111	I32 savestack_ix;
112	I32 savestack_max;
113	OP **retstack;
114	I32 retstack_ix;
115	I32 retstack_max;
116	COP *curcop;
117	JMPENV *top_env;
118
119	/* data associated with this coroutine (initial args) */
120	AV *args;
121	};	157	};
122		158
123	typedef struct coro *Coro__State;	159	typedef struct coro *Coro__State;
124	typedef struct coro *Coro__State_or_hashref;	160	typedef struct coro *Coro__State_or_hashref;
125		161
126	static AV *main_mainstack; /* used to differentiate between $main and others */	162	static AV *
127	static HV *coro_state_stash;	163	coro_clone_padlist (CV *cv)
128	static SV *ucoro_state_sv;
129	static U32 ucoro_state_hash;
130	static HV *padlist_cache;
131	static SV *coro_mortal; /* will be freed after next transfer */
132
133	/* mostly copied from op.c:cv_clone2 */
134	STATIC AV *
135	clone_padlist (AV *protopadlist)
136	{	164	{
137	AV *av;	165	AV *padlist = CvPADLIST (cv);
138	I32 ix;
139	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
140	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
141	SV **pname = AvARRAY (protopad_name);
142	SV **ppad = AvARRAY (protopad);
143	I32 fname = AvFILLp (protopad_name);
144	I32 fpad = AvFILLp (protopad);
145	AV *newpadlist, *newpad_name, *newpad;	166	AV *newpadlist, *newpad;
146	SV **npad;
147
148	newpad_name = newAV ();
149	for (ix = fname; ix >= 0; ix--)
150	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
151
152	newpad = newAV ();
153	av_fill (newpad, AvFILLp (protopad));
154	npad = AvARRAY (newpad);
155		167
156	newpadlist = newAV ();	168	newpadlist = newAV ();
157	AvREAL_off (newpadlist);	169	AvREAL_off (newpadlist);
158	av_store (newpadlist, 0, (SV *) newpad_name);	170	#if PERL_VERSION_ATLEAST (5,9,0)
		171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		172	#else
		173	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		174	#endif
		175	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		176	--AvFILLp (padlist);
		177
		178	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
159	av_store (newpadlist, 1, (SV *) newpad);	179	av_store (newpadlist, 1, (SV *)newpad);
160
161	av = newAV (); /* will be @_ */
162	av_extend (av, 0);
163	av_store (newpad, 0, (SV *) av);
164	AvFLAGS (av) = AVf_REIFY;
165
166	for (ix = fpad; ix > 0; ix--)
167	{
168	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
169	if (namesv && namesv != &PL_sv_undef)
170	{
171	char *name = SvPVX (namesv); /* XXX */
172	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
173	{ /* lexical from outside? */
174	npad[ix] = SvREFCNT_inc (ppad[ix]);
175	}
176	else
177	{ /* our own lexical */
178	SV *sv;
179	if (*name == '&')
180	sv = SvREFCNT_inc (ppad[ix]);
181	else if (*name == '@')
182	sv = (SV *) newAV ();
183	else if (*name == '%')
184	sv = (SV *) newHV ();
185	else
186	sv = NEWSV (0, 0);
187	#ifdef SvPADBUSY
188	if (!SvPADBUSY (sv))
189	#endif
190	SvPADMY_on (sv);
191	npad[ix] = sv;
192	}
193	}
194	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
195	{
196	npad[ix] = SvREFCNT_inc (ppad[ix]);
197	}
198	else
199	{
200	SV *sv = NEWSV (0, 0);
201	SvPADTMP_on (sv);
202	npad[ix] = sv;
203	}
204	}
205
206	#if 0 /* return -ENOTUNDERSTOOD */
207	/* Now that vars are all in place, clone nested closures. */
208
209	for (ix = fpad; ix > 0; ix--) {
210	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
211	if (namesv
212	&& namesv != &PL_sv_undef
213	&& !(SvFLAGS(namesv) & SVf_FAKE)
214	&& *SvPVX(namesv) == '&'
215	&& CvCLONE(ppad[ix]))
216	{
217	CV *kid = cv_clone((CV*)ppad[ix]);
218	SvREFCNT_dec(ppad[ix]);
219	CvCLONE_on(kid);
220	SvPADMY_on(kid);
221	npad[ix] = (SV*)kid;
222	}
223	}
224	#endif
225		180
226	return newpadlist;	181	return newpadlist;
227	}	182	}
228		183
229	STATIC void	184	static void
230	free_padlist (AV *padlist)	185	free_padlist (AV *padlist)
231	{	186	{
232	/* may be during global destruction */	187	/* may be during global destruction */
233	if (SvREFCNT (padlist))	188	if (SvREFCNT (padlist))
234	{	189	{
…		…
248		203
249	SvREFCNT_dec ((SV*)padlist);	204	SvREFCNT_dec ((SV*)padlist);
250	}	205	}
251	}	206	}
252		207
253	STATIC int	208	static int
254	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	209	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
255	{	210	{
256	AV *padlist;	211	AV *padlist;
257	AV *av = (AV *)mg->mg_obj;	212	AV *av = (AV *)mg->mg_obj;
258		213
259	/* casting is fun. */	214	/* casting is fun. */
260	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
261	free_padlist (padlist);	216	free_padlist (padlist);
		217
		218	SvREFCNT_dec (av);
		219
		220	return 0;
262	}	221	}
263		222
264	#define PERL_MAGIC_coro PERL_MAGIC_ext	223	#define PERL_MAGIC_coro PERL_MAGIC_ext
265		224
266	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
267		226
		227	#define CORO_MAGIC(cv) \
		228	SvMAGIC (cv) \
		229	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		230	? SvMAGIC (cv) \
		231	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		232	: 0
		233
268	/* the next two functions merely cache the padlists */	234	/* the next two functions merely cache the padlists */
269	STATIC void	235	static void
270	get_padlist (CV *cv)	236	get_padlist (CV *cv)
271	{	237	{
272	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	238	MAGIC *mg = CORO_MAGIC (cv);
		239	AV *av;
273		240
274	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
275	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
276	else	243	else
		244	{
		245	#if 0
		246	/* this is probably cleaner, but also slower? */
		247	CV *cp = Perl_cv_clone (cv);
		248	CvPADLIST (cv) = CvPADLIST (cp);
		249	CvPADLIST (cp) = 0;
		250	SvREFCNT_dec (cp);
		251	#else
277	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	252	CvPADLIST (cv) = coro_clone_padlist (cv);
		253	#endif
		254	}
278	}	255	}
279		256
280	STATIC void	257	static void
281	put_padlist (CV *cv)	258	put_padlist (CV *cv)
282	{	259	{
283	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	260	MAGIC *mg = CORO_MAGIC (cv);
		261	AV *av;
284		262
285	if (!mg)	263	if (!mg)
286	{	264	{
287	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	265	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
288	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	266	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
289	mg->mg_virtual = &vtbl_coro;	267	mg->mg_virtual = &vtbl_coro;
290	mg->mg_obj = (SV *)newAV ();	268	mg->mg_obj = (SV *)newAV ();
291	}	269	}
292		270
293	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	271	av = (AV *)mg->mg_obj;
		272
		273	if (AvFILLp (av) >= AvMAX (av))
		274	av_extend (av, AvMAX (av) + 1);
		275
		276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
294	}	277	}
295		278
296	#define SB do {	279	#define SB do {
297	#define SE } while (0)	280	#define SE } while (0)
298		281
299	#define LOAD(state) load_state(aTHX_ (state));	282	#define LOAD(state) load_state((state));
300	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	283	#define SAVE(state,flags) save_state((state),(flags));
301		284
302	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	285	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
303		286
304	static void	287	static void
305	load_state(pTHX_ Coro__State c)	288	load_state(Coro__State c)
306	{	289	{
307	PL_dowarn = c->dowarn;	290	#define VAR(name,type) PL_ ## name = c->name;
308	PL_in_eval = c->in_eval;	291	# include "state.h"
309		292	#undef VAR
310	PL_curstackinfo = c->curstackinfo;
311	PL_curstack = c->curstack;
312	PL_mainstack = c->mainstack;
313	PL_stack_sp = c->stack_sp;
314	PL_op = c->op;
315	PL_curpad = c->curpad;
316	PL_comppad = c->comppad;
317	PL_stack_base = c->stack_base;
318	PL_stack_max = c->stack_max;
319	PL_tmps_stack = c->tmps_stack;
320	PL_tmps_floor = c->tmps_floor;
321	PL_tmps_ix = c->tmps_ix;
322	PL_tmps_max = c->tmps_max;
323	PL_markstack = c->markstack;
324	PL_markstack_ptr = c->markstack_ptr;
325	PL_markstack_max = c->markstack_max;
326	PL_scopestack = c->scopestack;
327	PL_scopestack_ix = c->scopestack_ix;
328	PL_scopestack_max = c->scopestack_max;
329	PL_savestack = c->savestack;
330	PL_savestack_ix = c->savestack_ix;
331	PL_savestack_max = c->savestack_max;
332	PL_retstack = c->retstack;
333	PL_retstack_ix = c->retstack_ix;
334	PL_retstack_max = c->retstack_max;
335	PL_curcop = c->curcop;
336	PL_top_env = c->top_env;
337		293
338	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
339	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
340	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
341		297
…		…
344	CV *cv;	300	CV *cv;
345		301
346	/* now do the ugly restore mess */	302	/* now do the ugly restore mess */
347	while ((cv = (CV *)POPs))	303	while ((cv = (CV *)POPs))
348	{	304	{
349	AV *padlist = (AV *)POPs;
350
351	if (padlist)
352	{
353	put_padlist (cv); /* mark this padlist as available */	305	put_padlist (cv); /* mark this padlist as available */
354	CvPADLIST(cv) = padlist;	306	CvDEPTH (cv) = PTR2IV (POPs);
355	#ifdef USE_THREADS	307	CvPADLIST (cv) = (AV *)POPs;
356	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
357	#endif
358	}
359
360	++CvDEPTH(cv);
361	}	308	}
362		309
363	PUTBACK;	310	PUTBACK;
364	}	311	}
365	}	312	}
366		313
367	static void	314	static void
368	save_state(pTHX_ Coro__State c, int flags)	315	save_state(Coro__State c, int flags)
369	{	316	{
370	{	317	{
371	dSP;	318	dSP;
372	I32 cxix = cxstack_ix;	319	I32 cxix = cxstack_ix;
373	PERL_CONTEXT *ccstk = cxstack;	320	PERL_CONTEXT *ccstk = cxstack;
…		…
387	PERL_CONTEXT *cx = &ccstk[cxix--];	334	PERL_CONTEXT *cx = &ccstk[cxix--];
388		335
389	if (CxTYPE(cx) == CXt_SUB)	336	if (CxTYPE(cx) == CXt_SUB)
390	{	337	{
391	CV *cv = cx->blk_sub.cv;	338	CV *cv = cx->blk_sub.cv;
		339
392	if (CvDEPTH(cv))	340	if (CvDEPTH (cv))
393	{	341	{
394	#ifdef USE_THREADS
395	/*XPUSHs ((SV *)CvOWNER(cv));*/
396	/*CvOWNER(cv) = 0;*/
397	/*error must unlock this cv etc.. etc...*/
398	#endif
399	EXTEND (SP, CvDEPTH(cv)*2);	342	EXTEND (SP, 3);
400
401	while (--CvDEPTH(cv))
402	{
403	/* this tells the restore code to increment CvDEPTH */
404	PUSHs (Nullsv);
405	PUSHs ((SV *)cv);
406	}
407		343
408	PUSHs ((SV *)CvPADLIST(cv));	344	PUSHs ((SV *)CvPADLIST(cv));
		345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
409	PUSHs ((SV *)cv);	346	PUSHs ((SV *)cv);
410		347
		348	CvDEPTH (cv) = 0;
411	get_padlist (cv); /* this is a monster */	349	get_padlist (cv);
412	}	350	}
413	}	351	}
414	#ifdef CXt_FORMAT	352	#ifdef CXt_FORMAT
415	else if (CxTYPE(cx) == CXt_FORMAT)	353	else if (CxTYPE(cx) == CXt_FORMAT)
416	{	354	{
…		…
434		372
435	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	373	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
436	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
437	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
438		376
439	c->dowarn = PL_dowarn;	377	#define VAR(name,type)c->name = PL_ ## name;
440	c->in_eval = PL_in_eval;	378	# include "state.h"
441		379	#undef VAR
442	c->curstackinfo = PL_curstackinfo;
443	c->curstack = PL_curstack;
444	c->mainstack = PL_mainstack;
445	c->stack_sp = PL_stack_sp;
446	c->op = PL_op;
447	c->curpad = PL_curpad;
448	c->comppad = PL_comppad;
449	c->stack_base = PL_stack_base;
450	c->stack_max = PL_stack_max;
451	c->tmps_stack = PL_tmps_stack;
452	c->tmps_floor = PL_tmps_floor;
453	c->tmps_ix = PL_tmps_ix;
454	c->tmps_max = PL_tmps_max;
455	c->markstack = PL_markstack;
456	c->markstack_ptr = PL_markstack_ptr;
457	c->markstack_max = PL_markstack_max;
458	c->scopestack = PL_scopestack;
459	c->scopestack_ix = PL_scopestack_ix;
460	c->scopestack_max = PL_scopestack_max;
461	c->savestack = PL_savestack;
462	c->savestack_ix = PL_savestack_ix;
463	c->savestack_max = PL_savestack_max;
464	c->retstack = PL_retstack;
465	c->retstack_ix = PL_retstack_ix;
466	c->retstack_max = PL_retstack_max;
467	c->curcop = PL_curcop;
468	c->top_env = PL_top_env;
469	}	380	}
470		381
471	/*	382	/*
472	* allocate various perl stacks. This is an exact copy	383	* allocate various perl stacks. This is an exact copy
473	* of perl.c:init_stacks, except that it uses less memory	384	* of perl.c:init_stacks, except that it uses less memory
474	* on the (sometimes correct) assumption that coroutines do	385	* on the (sometimes correct) assumption that coroutines do
475	* not usually need a lot of stackspace.	386	* not usually need a lot of stackspace.
476	*/	387	*/
477	STATIC void	388	static void
478	coro_init_stacks (pTHX)	389	coro_init_stacks ()
479	{	390	{
480	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
481	PL_curstackinfo->si_type = PERLSI_MAIN;	392	PL_curstackinfo->si_type = PERLSI_MAIN;
482	PL_curstack = PL_curstackinfo->si_stack;	393	PL_curstack = PL_curstackinfo->si_stack;
483	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
505		416
506	New(54,PL_savestack,96,ANY);	417	New(54,PL_savestack,96,ANY);
507	PL_savestack_ix = 0;	418	PL_savestack_ix = 0;
508	PL_savestack_max = 96;	419	PL_savestack_max = 96;
509		420
		421	#if !PERL_VERSION_ATLEAST (5,9,0)
510	New(54,PL_retstack,8,OP*);	422	New(54,PL_retstack,8,OP*);
511	PL_retstack_ix = 0;	423	PL_retstack_ix = 0;
512	PL_retstack_max = 8;	424	PL_retstack_max = 8;
		425	#endif
513	}	426	}
514		427
515	/*	428	/*
516	* destroy the stacks, the callchain etc...	429	* destroy the stacks, the callchain etc...
517	*/	430	*/
518	STATIC void	431	static void
519	destroy_stacks(pTHX)	432	coro_destroy_stacks ()
520	{	433	{
521	if (!IN_DESTRUCT)	434	if (!IN_DESTRUCT)
522	{	435	{
523	/* is this ugly, I ask? */	436	/* is this ugly, I ask? */
524	LEAVE_SCOPE (0);	437	LEAVE_SCOPE (0);
525		438
526	/* sure it is, but more important: is it correct?? :/ */	439	/* sure it is, but more important: is it correct?? :/ */
527	FREETMPS;	440	FREETMPS;
		441
		442	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
528	}	443	}
529		444
530	while (PL_curstackinfo->si_next)	445	while (PL_curstackinfo->si_next)
531	PL_curstackinfo = PL_curstackinfo->si_next;	446	PL_curstackinfo = PL_curstackinfo->si_next;
532		447
533	while (PL_curstackinfo)	448	while (PL_curstackinfo)
534	{	449	{
535	PERL_SI *p = PL_curstackinfo->si_prev;	450	PERL_SI *p = PL_curstackinfo->si_prev;
536		451
537	{	452	{ /*D*//*remove*/
538	dSP;	453	dSP;
539	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	454	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
540	PUTBACK; /* possibly superfluous */	455	PUTBACK; /* possibly superfluous */
541	}	456	}
542		457
543	if (!IN_DESTRUCT)	458	if (!IN_DESTRUCT)
544	{	459	{
545	dounwind(-1);	460	dounwind (-1);/*D*//*remove*/
546	SvREFCNT_dec(PL_curstackinfo->si_stack);	461	SvREFCNT_dec (PL_curstackinfo->si_stack);
547	}	462	}
548		463
549	Safefree(PL_curstackinfo->si_cxstack);	464	Safefree (PL_curstackinfo->si_cxstack);
550	Safefree(PL_curstackinfo);	465	Safefree (PL_curstackinfo);
551	PL_curstackinfo = p;	466	PL_curstackinfo = p;
552	}	467	}
553		468
554	Safefree(PL_tmps_stack);	469	Safefree (PL_tmps_stack);
555	Safefree(PL_markstack);	470	Safefree (PL_markstack);
556	Safefree(PL_scopestack);	471	Safefree (PL_scopestack);
557	Safefree(PL_savestack);	472	Safefree (PL_savestack);
		473	#if !PERL_VERSION_ATLEAST (5,9,0)
558	Safefree(PL_retstack);	474	Safefree (PL_retstack);
559	}
560
561	static void
562	allocate_stack (Coro__State ctx, int alloc)
563	{
564	coro_stack *stack;
565
566	New (0, stack, 1, coro_stack);
567
568	stack->refcnt = 1;
569	stack->usecnt = 1;
570	stack->gencnt = ctx->gencnt = 0;
571	if (alloc)
572	{
573	#if HAVE_MMAP
574	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
575	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
576	if (stack->sptr == (void *)-1)
577	#endif	475	#endif
578	{
579	/*FIXME*//*D*//* reasonable stack size! */
580	stack->ssize = - (8192 * sizeof (long));
581	New (0, stack->sptr, 8192, long);
582	}
583	}
584	else
585	stack->sptr = 0;
586
587	ctx->stack = stack;
588	}	476	}
589		477
590	static void	478	static void
591	deallocate_stack (Coro__State ctx)	479	setup_coro (struct coro *coro)
592	{
593	coro_stack *stack = ctx->stack;
594
595	ctx->stack = 0;
596
597	if (stack)
598	{
599	if (!--stack->refcnt)
600	{
601	#ifdef HAVE_MMAP
602	if (stack->ssize > 0 && stack->sptr)
603	munmap (stack->sptr, stack->ssize);
604	else
605	#endif
606	Safefree (stack->sptr);
607
608	Safefree (stack);
609	}
610	else if (ctx->gencnt == stack->gencnt)
611	--stack->usecnt;
612	}
613	}
614
615	static void
616	setup_coro (void *arg)
617	{	480	{
618	/*	481	/*
619	* emulate part of the perl startup here.	482	* emulate part of the perl startup here.
620	*/	483	*/
621	dSP;
622	Coro__State ctx = (Coro__State)arg;
623	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
624		484
625	coro_init_stacks (aTHX);	485	coro_init_stacks ();
		486
626	/*PL_curcop = 0;*/	487	PL_curcop = 0;
627	/*PL_in_eval = PL_in_eval;*/ /* inherit */	488	PL_in_eval = 0;
		489	PL_curpm = 0;
		490
		491	{
		492	dSP;
		493	LOGOP myop;
		494
		495	/* I have no idea why this is needed, but it is */
		496	PUSHMARK (SP);
		497
628	SvREFCNT_dec (GvAV (PL_defgv));	498	SvREFCNT_dec (GvAV (PL_defgv));
629	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	499	GvAV (PL_defgv) = coro->args; coro->args = 0;
630		500
631	SPAGAIN;
632
633	if (ctx->stack)
634	{
635	ctx->cursp = 0;
636
637	PUSHMARK(SP);
638	PUTBACK;
639	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
640
641	if (SvTRUE (ERRSV))
642	croak (NULL);
643	else
644	croak ("FATAL: CCTXT coroutine returned!");
645	}
646	else
647	{
648	UNOP myop;
649
650	PL_op = (OP *)&myop;
651
652	Zero(&myop, 1, UNOP);	501	Zero (&myop, 1, LOGOP);
653	myop.op_next = Nullop;	502	myop.op_next = Nullop;
654	myop.op_flags = OPf_WANT_VOID;	503	myop.op_flags = OPf_WANT_VOID;
655		504
		505	PL_op = (OP *)&myop;
		506
656	PUSHMARK(SP);	507	PUSHMARK (SP);
657	XPUSHs (sub_init);	508	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
658	/*
659	* the next line is slightly wrong, as PL_op->op_next
660	* is actually being executed so we skip the first op.
661	* that doesn't matter, though, since it is only
662	* pp_nextstate and we never return...
663	* ah yes, and I don't care anyways ;)
664	*/
665	PUTBACK;	509	PUTBACK;
666	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	510	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
667	SPAGAIN;	511	SPAGAIN;
668		512
669	ENTER; /* necessary e.g. for dounwind */	513	ENTER; /* necessary e.g. for dounwind */
670	}	514	}
671	}	515	}
672		516
673	static void	517	static void
674	continue_coro (void *arg)	518	free_coro_mortal ()
675	{	519	{
676	/*
677	* this is a _very_ stripped down perl interpreter ;)
678	*/
679	Coro__State ctx = (Coro__State)arg;
680	JMPENV coro_start_env;
681
682	PL_top_env = &ctx->start_env;
683
684	ctx->cursp = 0;
685	PL_op = PL_op->op_next;
686	CALLRUNOPS(aTHX);
687
688	abort ();
689	}
690
691	STATIC void
692	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
693	{
694	dSTACKLEVEL;
695	static struct coro *xnext;
696
697	if (prev != next)
698	{
699	xnext = next;
700
701	if (next->mainstack)
702	{
703	SAVE (prev, flags);
704	LOAD (next);
705
706	/* mark this state as in-use */
707	next->mainstack = 0;
708	next->tmps_ix = -2;
709
710	/* stacklevel changed? if yes, grab the stack for us! */
711	if (flags & TRANSFER_SAVE_CCTXT)
712	{
713	if (!prev->stack)
714	allocate_stack (prev, 0);
715	else if (prev->cursp != stacklevel
716	&& prev->stack->usecnt > 1)
717	{
718	prev->gencnt = ++prev->stack->gencnt;
719	prev->stack->usecnt = 1;
720	}
721
722	/* has our stack been invalidated? */
723	if (next->stack && next->stack->gencnt != next->gencnt)
724	{
725	deallocate_stack (next);
726	allocate_stack (next, 1);
727	coro_create (&(next->stack->cctx),
728	continue_coro, (void *)next,
729	next->stack->sptr, labs (next->stack->ssize));
730	}
731
732	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733	/* don't add any code here */
734	}
735
736	}
737	else if (next->tmps_ix == -2)
738	croak ("tried to transfer to running coroutine");
739	else
740	{
741	SAVE (prev, -1); /* first get rid of the old state */
742
743	if (flags & TRANSFER_SAVE_CCTXT)
744	{
745	if (!prev->stack)
746	allocate_stack (prev, 0);
747
748	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
749	{
750	PL_top_env = &next->start_env;
751
752	setup_coro (next);
753
754	prev->stack->refcnt++;
755	prev->stack->usecnt++;
756	next->stack = prev->stack;
757	next->gencnt = prev->gencnt;
758	}
759	else
760	{
761	assert (!next->stack);
762	allocate_stack (next, 1);
763	coro_create (&(next->stack->cctx),
764	setup_coro, (void *)next,
765	next->stack->sptr, labs (next->stack->ssize));
766	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
767	/* don't add any code here */
768	}
769	}
770	else
771	setup_coro (next);
772	}
773
774	/*
775	* xnext is now either prev or next, depending on wether
776	* we switched the c stack or not. that's why I use a global
777	* variable, that should become thread-specific at one point.
778	*/
779	xnext->cursp = stacklevel;
780	}
781
782	if (coro_mortal)	520	if (coro_mortal)
783	{	521	{
784	SvREFCNT_dec (coro_mortal);	522	SvREFCNT_dec (coro_mortal);
785	coro_mortal = 0;	523	coro_mortal = 0;
786	}	524	}
787	}	525	}
788		526
789	#define SV_CORO(sv,func) \	527	static void NOINLINE
790	do { \	528	prepare_cctx (coro_cctx *cctx)
791	if (SvROK (sv)) \	529	{
792	sv = SvRV (sv); \	530	dSP;
793	\	531	LOGOP myop;
794	if (SvTYPE(sv) == SVt_PVHV) \
795	{ \
796	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
797	\
798	if (!he) \
799	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
800	\
801	(sv) = SvRV (HeVAL(he)); \
802	} \
803	\
804	/* must also be changed inside Coro::Cont::yield */ \
805	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
806	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
807	\
808	} while(0)
809		532
810	#define SvSTATE(sv) (struct coro *)SvIV (sv)	533	Zero (&myop, 1, LOGOP);
		534	myop.op_next = PL_op;
		535	myop.op_flags = OPf_WANT_VOID;
811		536
		537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		538
		539	PUSHMARK (SP);
		540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		541	PUTBACK;
		542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		543	SPAGAIN;
		544	}
		545
		546	static void
		547	coro_run (void *arg)
		548	{
		549	/* coro_run is the alternative epilogue of transfer() */
		550	UNLOCK;
		551
		552	/*
		553	* this is a _very_ stripped down perl interpreter ;)
		554	*/
		555	PL_top_env = &PL_start_env;
		556
		557	/* inject call to cctx_init */
		558	prepare_cctx ((coro_cctx *)arg);
		559
		560	/* somebody will hit me for both perl_run and PL_restartop */
		561	perl_run (PL_curinterp);
		562
		563	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		564	abort ();
		565	}
		566
		567	static coro_cctx *
		568	cctx_new ()
		569	{
		570	coro_cctx *cctx;
		571
		572	++cctx_count;
		573
		574	New (0, cctx, 1, coro_cctx);
		575
		576	#if HAVE_MMAP
		577
		578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		579	/* mmap suppsedly does allocate-on-write for us */
		580	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		581
		582	if (cctx->sptr == (void *)-1)
		583	{
		584	perror ("FATAL: unable to mmap stack for coroutine");
		585	_exit (EXIT_FAILURE);
		586	}
		587
		588	# if STACKGUARD
		589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		590	# endif
		591
		592	#else
		593
		594	cctx->ssize = STACKSIZE * (long)sizeof (long);
		595	New (0, cctx->sptr, STACKSIZE, long);
		596
		597	if (!cctx->sptr)
		598	{
		599	perror ("FATAL: unable to malloc stack for coroutine");
		600	_exit (EXIT_FAILURE);
		601	}
		602
		603	#endif
		604
		605	#if USE_VALGRIND
		606	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		607	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		608	cctx->ssize + (char *)cctx->sptr
		609	);
		610	#endif
		611
		612	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		613
		614	return cctx;
		615	}
		616
		617	static void
		618	cctx_free (coro_cctx *cctx)
		619	{
		620	if (!cctx)
		621	return;
		622
		623	--cctx_count;
		624
		625	#if USE_VALGRIND
		626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		627	#endif
		628
		629	#if HAVE_MMAP
		630	munmap (cctx->sptr, cctx->ssize);
		631	#else
		632	Safefree (cctx->sptr);
		633	#endif
		634
		635	Safefree (cctx);
		636	}
		637
		638	static coro_cctx *
		639	cctx_get ()
		640	{
		641	coro_cctx *cctx;
		642
		643	if (cctx_first)
		644	{
		645	--cctx_idle;
		646	cctx = cctx_first;
		647	cctx_first = cctx->next;
		648	}
		649	else
		650	{
		651	cctx = cctx_new ();
		652	PL_op = PL_op->op_next;
		653	}
		654
		655	return cctx;
		656	}
		657
		658	static void
		659	cctx_put (coro_cctx *cctx)
		660	{
		661	++cctx_idle;
		662	cctx->next = cctx_first;
		663	cctx_first = cctx;
		664	}
		665
		666	/* never call directly, always through the coro_state_transfer global variable */
		667	static void NOINLINE
		668	transfer (struct coro *prev, struct coro *next, int flags)
		669	{
		670	dSTACKLEVEL;
		671
		672	/* sometimes transfer is only called to set idle_sp */
		673	if (flags == TRANSFER_SET_STACKLEVEL)
		674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		675	else if (prev != next)
		676	{
		677	coro_cctx *prev__cctx;
		678
		679	if (!prev->cctx)
		680	{
		681	/* create a new empty context */
		682	Newz (0, prev->cctx, 1, coro_cctx);
		683	prev->cctx->inuse = 1;
		684	prev->flags |= CF_RUNNING;
		685	}
		686
		687	if (!prev->flags & CF_RUNNING)
		688	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		689
		690	if (next->flags & CF_RUNNING)
		691	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		692
		693	prev->flags &= ~CF_RUNNING;
		694	next->flags |= CF_RUNNING;
		695
		696	LOCK;
		697
		698	if (next->mainstack)
		699	{
		700	/* coroutine already started */
		701	SAVE (prev, flags);
		702	LOAD (next);
		703	}
		704	else
		705	{
		706	/* need to start coroutine */
		707	/* first get rid of the old state */
		708	SAVE (prev, -1);
		709	/* setup coroutine call */
		710	setup_coro (next);
		711	/* need a new stack */
		712	assert (!next->stack);
		713	}
		714
		715	prev__cctx = prev->cctx;
		716
		717	/* possibly "free" the cctx */
		718	if (prev__cctx->idle_sp == STACKLEVEL)
		719	{
		720	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		721	assert (PL_top_env == prev__cctx->top_env);
		722
		723	cctx_put (prev__cctx);
		724	prev->cctx = 0;
		725	}
		726
		727	if (!next->cctx)
		728	next->cctx = cctx_get ();
		729
		730	if (prev__cctx != next->cctx)
		731	{
		732	assert ( prev__cctx->inuse);
		733	assert (!next->cctx->inuse);
		734
		735	prev__cctx->inuse = 0;
		736	next->cctx->inuse = 1;
		737
		738	prev__cctx->top_env = PL_top_env;
		739	PL_top_env = next->cctx->top_env;
		740	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		741	}
		742
		743	free_coro_mortal ();
		744
		745	UNLOCK;
		746	}
		747	}
		748
		749	struct transfer_args
		750	{
		751	struct coro *prev, *next;
		752	int flags;
		753	};
		754
		755	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		756
		757	static void
		758	coro_state_destroy (struct coro *coro)
		759	{
		760	if (coro->refcnt--)
		761	return;
		762
		763	if (coro->flags & CF_RUNNING)
		764	croak ("FATAL: tried to destroy currently running coroutine");
		765
		766	if (coro->mainstack && coro->mainstack != main_mainstack)
		767	{
		768	struct coro temp;
		769
		770	SAVE ((&temp), TRANSFER_SAVE_ALL);
		771	LOAD (coro);
		772
		773	coro_destroy_stacks ();
		774
		775	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		776
		777	coro->mainstack = 0;
		778	}
		779
		780	cctx_free (coro->cctx);
		781	SvREFCNT_dec (coro->args);
		782	Safefree (coro);
		783	}
		784
812	static void	785	static int
		786	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		787	{
		788	struct coro *coro = (struct coro *)mg->mg_ptr;
		789	mg->mg_ptr = 0;
		790
		791	coro_state_destroy (coro);
		792
		793	return 0;
		794	}
		795
		796	static int
		797	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		798	{
		799	struct coro *coro = (struct coro *)mg->mg_ptr;
		800
		801	++coro->refcnt;
		802
		803	return 0;
		804	}
		805
		806	static MGVTBL coro_state_vtbl = {
		807	0, 0, 0, 0,
		808	coro_state_clear,
		809	0,
		810	#ifdef MGf_DUP
		811	coro_state_dup,
		812	#else
		813	# define MGf_DUP 0
		814	#endif
		815	};
		816
		817	static struct coro *
		818	SvSTATE (SV *coro)
		819	{
		820	HV *stash;
		821	MAGIC *mg;
		822
		823	if (SvROK (coro))
		824	coro = SvRV (coro);
		825
		826	stash = SvSTASH (coro);
		827	if (stash != coro_stash && stash != coro_state_stash)
		828	{
		829	/* very slow, but rare, check */
		830	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		831	croak ("Coro::State object required");
		832	}
		833
		834	mg = SvMAGIC (coro);
		835	assert (mg->mg_type == PERL_MAGIC_ext);
		836	return (struct coro *)mg->mg_ptr;
		837	}
		838
		839	static void
		840	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		841	{
		842	ta->prev = SvSTATE (prev);
		843	ta->next = SvSTATE (next);
		844	ta->flags = flags;
		845	}
		846
		847	static void
813	api_transfer(pTHX_ SV *prev, SV *next, int flags)	848	api_transfer (SV *prev, SV *next, int flags)
814	{	849	{
815	SV_CORO (prev, "Coro::transfer");	850	dTHX;
816	SV_CORO (next, "Coro::transfer");	851	struct transfer_args ta;
817		852
818	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	853	prepare_transfer (&ta, prev, next, flags);
		854	TRANSFER (ta);
819	}	855	}
820		856
821	/** Coro ********************************************************************/	857	/** Coro ********************************************************************/
822		858
823	#define PRIO_MAX 3	859	#define PRIO_MAX 3
…		…
827	#define PRIO_IDLE -3	863	#define PRIO_IDLE -3
828	#define PRIO_MIN -4	864	#define PRIO_MIN -4
829		865
830	/* for Coro.pm */	866	/* for Coro.pm */
831	static GV *coro_current, *coro_idle;	867	static GV *coro_current, *coro_idle;
832	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	868	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
833	static int coro_nready;	869	static int coro_nready;
834		870
835	static void	871	static void
836	coro_enq (SV *sv)	872	coro_enq (SV *coro_sv)
837	{	873	{
838	if (SvTYPE (sv) == SVt_PVHV)
839	{
840	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
841	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
842
843	prio = prio > PRIO_MAX ? PRIO_MAX
844	: prio < PRIO_MIN ? PRIO_MIN
845	: prio;
846
847	av_push (coro_ready [prio - PRIO_MIN], sv);	874	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
848	coro_nready++;	875	coro_nready++;
849
850	return;
851	}
852
853	croak ("Coro::ready tried to enqueue something that is not a coroutine");
854	}	876	}
855		877
856	static SV *	878	static SV *
857	coro_deq (int min_prio)	879	coro_deq (int min_prio)
858	{	880	{
…		…
861	min_prio -= PRIO_MIN;	883	min_prio -= PRIO_MIN;
862	if (min_prio < 0)	884	if (min_prio < 0)
863	min_prio = 0;	885	min_prio = 0;
864		886
865	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
866	if (av_len (coro_ready[prio]) >= 0)	888	if (AvFILLp (coro_ready [prio]) >= 0)
867	{	889	{
868	coro_nready--;	890	coro_nready--;
869	return av_shift (coro_ready[prio]);	891	return av_shift (coro_ready [prio]);
870	}	892	}
871		893
872	return 0;	894	return 0;
873	}	895	}
874		896
875	static void	897	static int
876	api_ready (SV *coro)	898	api_ready (SV *coro_sv)
877	{	899	{
		900	struct coro *coro;
		901
878	if (SvROK (coro))	902	if (SvROK (coro_sv))
879	coro = SvRV (coro);	903	coro_sv = SvRV (coro_sv);
880		904
		905	coro = SvSTATE (coro_sv);
		906
		907	if (coro->flags & CF_READY)
		908	return 0;
		909
		910	if (coro->flags & CF_RUNNING)
		911	croak ("Coro::ready called on currently running coroutine");
		912
		913	coro->flags |= CF_READY;
		914
		915	LOCK;
881	coro_enq (SvREFCNT_inc (coro));	916	coro_enq (SvREFCNT_inc (coro_sv));
		917	UNLOCK;
		918
		919	return 1;
		920	}
		921
		922	static int
		923	api_is_ready (SV *coro_sv)
		924	{
		925	return !!SvSTATE (coro_sv)->flags & CF_READY;
		926	}
		927
		928	static void
		929	prepare_schedule (struct transfer_args *ta)
		930	{
		931	SV *current, *prev, *next;
		932
		933	current = GvSV (coro_current);
		934
		935	for (;;)
		936	{
		937	LOCK;
		938	next = coro_deq (PRIO_MIN);
		939	UNLOCK;
		940
		941	if (next)
		942	break;
		943
		944	{
		945	dSP;
		946
		947	ENTER;
		948	SAVETMPS;
		949
		950	PUSHMARK (SP);
		951	PUTBACK;
		952	call_sv (GvSV (coro_idle), G_DISCARD);
		953
		954	FREETMPS;
		955	LEAVE;
		956	}
		957	}
		958
		959	prev = SvRV (current);
		960	SvRV (current) = next;
		961
		962	/* free this only after the transfer */
		963	LOCK;
		964	free_coro_mortal ();
		965	UNLOCK;
		966	coro_mortal = prev;
		967
		968	ta->prev = SvSTATE (prev);
		969	ta->next = SvSTATE (next);
		970	ta->flags = TRANSFER_SAVE_ALL;
		971
		972	ta->next->flags &= ~CF_READY;
		973	}
		974
		975	static void
		976	prepare_cede (struct transfer_args *ta)
		977	{
		978	api_ready (GvSV (coro_current));
		979
		980	prepare_schedule (ta);
882	}	981	}
883		982
884	static void	983	static void
885	api_schedule (void)	984	api_schedule (void)
886	{	985	{
887	SV *prev, *next;	986	dTHX;
		987	struct transfer_args ta;
888		988
889	prev = SvRV (GvSV (coro_current));	989	prepare_schedule (&ta);
890	next = coro_deq (PRIO_MIN);	990	TRANSFER (ta);
891
892	if (!next)
893	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
894
895	/* free this only after the transfer */
896	coro_mortal = prev;
897	SV_CORO (prev, "Coro::schedule");
898
899	SvRV (GvSV (coro_current)) = next;
900
901	SV_CORO (next, "Coro::schedule");
902
903	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
904	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
905	}	991	}
906		992
907	static void	993	static void
908	api_cede (void)	994	api_cede (void)
909	{	995	{
910	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	996	dTHX;
		997	struct transfer_args ta;
911		998
912	api_schedule ();	999	prepare_cede (&ta);
		1000	TRANSFER (ta);
913	}	1001	}
914		1002
915	MODULE = Coro::State PACKAGE = Coro::State	1003	MODULE = Coro::State PACKAGE = Coro::State
916		1004
917	PROTOTYPES: ENABLE	1005	PROTOTYPES: DISABLE
918		1006
919	BOOT:	1007	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1008	{
921	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1009	#ifdef USE_ITHREADS
922	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1010	MUTEX_INIT (&coro_mutex);
		1011	#endif
		1012	BOOT_PAGESIZE;
		1013
923	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1014	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
924		1015
925	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1016	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
926	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1017	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
927	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1018	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
928	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
929
930	if (!padlist_cache)
931	padlist_cache = newHV ();
932		1019
933	main_mainstack = PL_mainstack;	1020	main_mainstack = PL_mainstack;
934		1021
935	coroapi.ver = CORO_API_VERSION;	1022	coroapi.ver = CORO_API_VERSION;
936	coroapi.transfer = api_transfer;	1023	coroapi.transfer = api_transfer;
937	}
938		1024
939	Coro::State	1025	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
940	_newprocess(args)	1026	}
941	SV * args	1027
942	PROTOTYPE: $	1028	SV *
		1029	new (char *klass, ...)
943	CODE:	1030	CODE:
944	Coro__State coro;	1031	{
		1032	struct coro *coro;
		1033	HV *hv;
		1034	int i;
945		1035
946	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
947	croak ("Coro::State::_newprocess expects an arrayref");
948
949	Newz (0, coro, 1, struct coro);	1036	Newz (0, coro, 1, struct coro);
		1037	coro->args = newAV ();
950		1038
951	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1039	hv = newHV ();
952	coro->mainstack = 0; /* actual work is done inside transfer */	1040	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
953	coro->stack = 0;	1041	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
954		1042
955	/* same as JMPENV_BOOTSTRAP */	1043	for (i = 1; i < items; i++)
956	/* we might be able to recycle start_env, but safe is safe */	1044	av_push (coro->args, newSVsv (ST (i)));
957	//Zero(&coro->start_env, 1, JMPENV);	1045	}
958	coro->start_env.je_ret = -1;
959	coro->start_env.je_mustcatch = TRUE;
960
961	RETVAL = coro;
962	OUTPUT:	1046	OUTPUT:
963	RETVAL	1047	RETVAL
964		1048
965	void	1049	void
966	transfer(prev, next, flags)	1050	_set_stacklevel (...)
967	SV *prev	1051	ALIAS:
968	SV *next	1052	Coro::State::transfer = 1
969	int flags	1053	Coro::schedule = 2
970	PROTOTYPE: @	1054	Coro::cede = 3
		1055	Coro::Cont::yield = 4
971	CODE:	1056	CODE:
972	PUTBACK;	1057	{
973	SV_CORO (next, "Coro::transfer");	1058	struct transfer_args ta;
974	SV_CORO (prev, "Coro::transfer");	1059
975	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1060	switch (ix)
976	SPAGAIN;	1061	{
		1062	case 0:
		1063	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1064	ta.next = 0;
		1065	ta.flags = TRANSFER_SET_STACKLEVEL;
		1066	break;
		1067
		1068	case 1:
		1069	if (items != 3)
		1070	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1071
		1072	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1073	break;
		1074
		1075	case 2:
		1076	prepare_schedule (&ta);
		1077	break;
		1078
		1079	case 3:
		1080	prepare_cede (&ta);
		1081	break;
		1082
		1083	case 4:
		1084	{
		1085	SV *yieldstack;
		1086	SV *sv;
		1087	AV *defav = GvAV (PL_defgv);
		1088
		1089	yieldstack = *hv_fetch (
		1090	(HV *)SvRV (GvSV (coro_current)),
		1091	"yieldstack", sizeof ("yieldstack") - 1,
		1092	0
		1093	);
		1094
		1095	/* set up @_ -- ugly */
		1096	av_clear (defav);
		1097	av_fill (defav, items - 1);
		1098	while (items--)
		1099	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1100
		1101	sv = av_pop ((AV *)SvRV (yieldstack));
		1102	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1103	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1104	ta.flags = 0;
		1105	SvREFCNT_dec (sv);
		1106	}
		1107	break;
		1108
		1109	}
		1110
		1111	TRANSFER (ta);
		1112	}
977		1113
978	void	1114	void
979	DESTROY(coro)	1115	_clone_state_from (SV *dst, SV *src)
980	Coro::State coro	1116	CODE:
981	CODE:	1117	{
		1118	struct coro *coro_src = SvSTATE (src);
982		1119
983	if (coro->mainstack && coro->mainstack != main_mainstack)	1120	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
984	{
985	struct coro temp;
986		1121
987	PUTBACK;	1122	++coro_src->refcnt;
988	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1123	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
989	LOAD(aTHX_ coro);	1124	}
990	SPAGAIN;
991
992	destroy_stacks (aTHX);
993
994	LOAD((&temp)); /* this will get rid of defsv etc.. */
995	SPAGAIN;
996
997	coro->mainstack = 0;
998	}
999
1000	deallocate_stack (coro);
1001	SvREFCNT_dec (coro->args);
1002	Safefree (coro);
1003		1125
1004	void	1126	void
1005	_exit(code)	1127	_exit (code)
1006	int code	1128	int code
1007	PROTOTYPE: $	1129	PROTOTYPE: $
1008	CODE:	1130	CODE:
1009	_exit (code);	1131	_exit (code);
1010		1132
1011	MODULE = Coro::State PACKAGE = Coro::Cont	1133	int
		1134	cctx_count ()
		1135	CODE:
		1136	RETVAL = cctx_count;
		1137	OUTPUT:
		1138	RETVAL
1012		1139
1013	# this is slightly dirty (should expose a c-level api)	1140	int
1014		1141	cctx_idle ()
1015	void	1142	CODE:
1016	yield(...)	1143	RETVAL = cctx_idle;
1017	PROTOTYPE: @	1144	OUTPUT:
1018	CODE:	1145	RETVAL
1019	static SV *returnstk;
1020	SV *sv;
1021	AV *defav = GvAV (PL_defgv);
1022	struct coro *prev, *next;
1023
1024	if (!returnstk)
1025	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1026
1027	/* set up @_ -- ugly */
1028	av_clear (defav);
1029	av_fill (defav, items - 1);
1030	while (items--)
1031	av_store (defav, items, SvREFCNT_inc (ST(items)));
1032
1033	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1034	sv = av_pop ((AV *)SvRV (returnstk));
1035	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1036	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1037	SvREFCNT_dec (sv);
1038
1039	transfer(aTHX_ prev, next, 0);
1040		1146
1041	MODULE = Coro::State PACKAGE = Coro	1147	MODULE = Coro::State PACKAGE = Coro
1042		1148
1043	# this is slightly dirty (should expose a c-level api)
1044
1045	BOOT:	1149	BOOT:
1046	{	1150	{
1047	int i;	1151	int i;
		1152
1048	HV *stash = gv_stashpv ("Coro", TRUE);	1153	coro_stash = gv_stashpv ("Coro", TRUE);
1049		1154
1050	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1155	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1051	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1156	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1052	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1157	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1053	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1158	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1054	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1159	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1055	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1160	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1056		1161
1057	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1162	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1058	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1163	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1059		1164
1060	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1165	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1064	SV *sv = perl_get_sv("Coro::API", 1);	1169	SV *sv = perl_get_sv("Coro::API", 1);
1065		1170
1066	coroapi.schedule = api_schedule;	1171	coroapi.schedule = api_schedule;
1067	coroapi.cede = api_cede;	1172	coroapi.cede = api_cede;
1068	coroapi.ready = api_ready;	1173	coroapi.ready = api_ready;
		1174	coroapi.is_ready = api_is_ready;
1069	coroapi.nready = &coro_nready;	1175	coroapi.nready = &coro_nready;
1070	coroapi.current = coro_current;	1176	coroapi.current = coro_current;
1071		1177
1072	GCoroAPI = &coroapi;	1178	GCoroAPI = &coroapi;
1073	sv_setiv(sv, (IV)&coroapi);	1179	sv_setiv (sv, (IV)&coroapi);
1074	SvREADONLY_on(sv);	1180	SvREADONLY_on (sv);
1075	}	1181	}
1076	}	1182	}
1077		1183
1078	#if !PERL_MICRO	1184	int
		1185	prio (Coro::State coro, int newprio = 0)
		1186	ALIAS:
		1187	nice = 1
		1188	CODE:
		1189	{
		1190	RETVAL = coro->prio;
1079		1191
1080	void	1192	if (items > 1)
		1193	{
		1194	if (ix)
		1195	newprio += coro->prio;
		1196
		1197	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1198	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1199
		1200	coro->prio = newprio;
		1201	}
		1202	}
		1203
		1204	SV *
1081	ready(self)	1205	ready (SV *self)
1082	SV * self
1083	PROTOTYPE: $	1206	PROTOTYPE: $
1084	CODE:	1207	CODE:
1085	api_ready (self);	1208	RETVAL = boolSV (api_ready (self));
		1209	OUTPUT:
		1210	RETVAL
1086		1211
1087	#endif	1212	SV *
		1213	is_ready (SV *self)
		1214	PROTOTYPE: $
		1215	CODE:
		1216	RETVAL = boolSV (api_is_ready (self));
		1217	OUTPUT:
		1218	RETVAL
1088		1219
1089	int	1220	int
1090	nready(...)	1221	nready (...)
1091	PROTOTYPE:	1222	PROTOTYPE:
1092	CODE:	1223	CODE:
1093	RETVAL = coro_nready;	1224	RETVAL = coro_nready;
1094	OUTPUT:	1225	OUTPUT:
1095	RETVAL	1226	RETVAL
1096		1227
		1228	MODULE = Coro::State PACKAGE = Coro::AIO
		1229
		1230	SV *
		1231	_get_state ()
		1232	CODE:
		1233	{
		1234	struct {
		1235	int errorno;
		1236	int laststype;
		1237	int laststatval;
		1238	Stat_t statcache;
		1239	} data;
		1240
		1241	data.errorno = errno;
		1242	data.laststype = PL_laststype;
		1243	data.laststatval = PL_laststatval;
		1244	data.statcache = PL_statcache;
		1245
		1246	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1247	}
		1248	OUTPUT:
		1249	RETVAL
		1250
1097	void	1251	void
1098	schedule(...)	1252	_set_state (char *data_)
1099	PROTOTYPE:	1253	PROTOTYPE: $
1100	CODE:	1254	CODE:
1101	api_schedule ();	1255	{
		1256	struct {
		1257	int errorno;
		1258	int laststype;
		1259	int laststatval;
		1260	Stat_t statcache;
		1261	} *data = (void *)data_;
1102		1262
1103	void	1263	errno = data->errorno;
1104	cede(...)	1264	PL_laststype = data->laststype;
1105	PROTOTYPE:	1265	PL_laststatval = data->laststatval;
1106	CODE:	1266	PL_statcache = data->statcache;
1107	api_cede ();	1267	}
1108

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