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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.78 by root, Wed Nov 1 01:21:21 2006 UTC vs.
Revision 1.124 by root, Tue Dec 5 12:50:04 2006 UTC

1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	#if PERL_VERSION < 6	9	#if USE_VALGRIND
		10	# include <valgrind/valgrind.h>
		11	#endif
		12
		13	/* the maximum number of idle cctx that will be pooled */
		14	#define MAX_IDLE_CCTX 8
		15
		16	#define PERL_VERSION_ATLEAST(a,b,c) \
		17	(PERL_REVISION > (a) \
		18	|| (PERL_REVISION == (a) \
		19	&& (PERL_VERSION > (b) \
		20	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		21
		22	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	23	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	24	# define PL_ppaddr ppaddr
14	# endif	25	# endif
15	# ifndef call_sv	26	# ifndef call_sv
16	# define call_sv perl_call_sv	27	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	38	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	39	# define IS_PADCONST(v) 0
29	# endif	40	# endif
30	#endif	41	#endif
31		42
		43	#include <stdio.h>
32	#include <errno.h>	44	#include <errno.h>
		45	#include <assert.h>
33		46
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	47	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	48	# undef STACKGUARD
36	#endif	49	#endif
37		50
…		…
53	# ifndef PAGESIZE	66	# ifndef PAGESIZE
54	# define PAGESIZE pagesize	67	# define PAGESIZE pagesize
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)	68	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;	69	static long pagesize;
57	# else	70	# else
58	# define BOOT_PAGESIZE	71	# define BOOT_PAGESIZE (void)0
59	# endif	72	# endif
		73	#else
		74	# define PAGESIZE 0
		75	# define BOOT_PAGESIZE (void)0
60	#endif	76	#endif
61
62	#define SUB_INIT "Coro::State::initialize"
63	#define UCORO_STATE "_coro_state"
64		77
65	/* The next macro should declare a variable stacklevel that contains and approximation	78	/* The next macro should declare a variable stacklevel that contains and approximation
66	* to the current C stack pointer. Its property is that it changes with each call	79	* to the current C stack pointer. Its property is that it changes with each call
67	* and should be unique. */	80	* and should be unique. */
		81	#define dSTACKLEVEL int stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	82	#define STACKLEVEL ((void *)&stacklevel)
69		83
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	84	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		85
72	#define labs(l) ((l) >= 0 ? (l) : -(l))	86	#if __GNUC__ >= 3
		87	# define attribute(x) __attribute__(x)
		88	#else
		89	# define attribute(x)
		90	#endif
		91
		92	#define NOINLINE attribute ((noinline))
73		93
74	#include "CoroAPI.h"	94	#include "CoroAPI.h"
75		95
76	#ifdef USE_ITHREADS	96	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	97	static perl_mutex coro_mutex;
…		…
80	#else	100	#else
81	# define LOCK (void)0	101	# define LOCK (void)0
82	# define UNLOCK (void)0	102	# define UNLOCK (void)0
83	#endif	103	#endif
84		104
		105	struct io_state
		106	{
		107	int errorno;
		108	I32 laststype;
		109	int laststatval;
		110	Stat_t statcache;
		111	};
		112
85	static struct CoroAPI coroapi;	113	static struct CoroAPI coroapi;
86	static AV *main_mainstack; /* used to differentiate between $main and others */	114	static AV *main_mainstack; /* used to differentiate between $main and others */
87	static HV *coro_state_stash;	115	static HV *coro_state_stash, *coro_stash;
88	static SV *ucoro_state_sv;
89	static U32 ucoro_state_hash;
90	static SV *coro_mortal; /* will be freed after next transfer */	116	static SV *coro_mortal; /* will be freed after next transfer */
91		117
92	/* this is actually not only the c stack but also c registers etc... */	118	static struct coro_cctx *cctx_first;
		119	static int cctx_count, cctx_idle;
		120
		121	/* this is a structure representing a c-level coroutine */
93	typedef struct {	122	typedef struct coro_cctx {
94	int refcnt; /* pointer reference counter */	123	struct coro_cctx *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		124
98	coro_context cctx;	125	/* the stack */
99
100	void *sptr;	126	void *sptr;
101	long ssize; /* positive == mmap, otherwise malloc */	127	long ssize; /* positive == mmap, otherwise malloc */
102	} coro_stack;
103		128
		129	/* cpu state */
		130	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		131	JMPENV *top_env;
		132	coro_context cctx;
		133
		134	int inuse;
		135
		136	#if USE_VALGRIND
		137	int valgrind_id;
		138	#endif
		139	} coro_cctx;
		140
		141	enum {
		142	CF_RUNNING = 0x0001, /* coroutine is running */
		143	CF_READY = 0x0002, /* coroutine is ready */
		144	CF_NEW = 0x0004, /* ahs never been switched to */
		145	};
		146
		147	/* this is a structure representing a perl-level coroutine */
104	struct coro {	148	struct coro {
105	/* the top-level JMPENV for each coroutine, needed to catch dies. */	149	/* the c coroutine allocated to this perl coroutine, if any */
106	JMPENV start_env;	150	coro_cctx *cctx;
107
108	/* the optional C context */
109	coro_stack *stack;
110	void *cursp;
111	int gencnt;
112
113	/* optionally saved, might be zero */
114	AV *defav;
115	SV *defsv;
116	SV *errsv;
117
118	/* saved global state not related to stacks */
119	U8 dowarn;
120	I32 in_eval;
121
122	/* the stacks and related info (callchain etc..) */
123	PERL_SI *curstackinfo;
124	AV *curstack;
125	AV *mainstack;
126	SV **stack_sp;
127	OP *op;
128	SV **curpad;
129	AV *comppad;
130	CV *compcv;
131	SV **stack_base;
132	SV **stack_max;
133	SV **tmps_stack;
134	I32 tmps_floor;
135	I32 tmps_ix;
136	I32 tmps_max;
137	I32 *markstack;
138	I32 *markstack_ptr;
139	I32 *markstack_max;
140	I32 *scopestack;
141	I32 scopestack_ix;
142	I32 scopestack_max;
143	ANY *savestack;
144	I32 savestack_ix;
145	I32 savestack_max;
146	OP **retstack;
147	I32 retstack_ix;
148	I32 retstack_max;
149	PMOP *curpm;
150	COP *curcop;
151	JMPENV *top_env;
152		151
153	/* data associated with this coroutine (initial args) */	152	/* data associated with this coroutine (initial args) */
154	AV *args;	153	AV *args;
		154	int refcnt;
		155	int save; /* CORO_SAVE flags */
		156	int flags; /* CF_ flags */
		157
		158	/* optionally saved, might be zero */
		159	AV *defav; /* @_ */
		160	SV *defsv; /* $_ */
		161	SV *errsv; /* $@ */
		162	SV *irssv; /* $/ */
		163	SV *irssv_sv; /* real $/ cache */
		164
		165	#define VAR(name,type) type name;
		166	# include "state.h"
		167	#undef VAR
		168
		169	/* coro process data */
		170	int prio;
155	};	171	};
156		172
157	typedef struct coro *Coro__State;	173	typedef struct coro *Coro__State;
158	typedef struct coro *Coro__State_or_hashref;	174	typedef struct coro *Coro__State_or_hashref;
159		175
160	static AV *	176	static AV *
161	coro_clone_padlist (pTHX_ CV *cv)	177	coro_clone_padlist (CV *cv)
162	{	178	{
163	AV *padlist = CvPADLIST (cv);	179	AV *padlist = CvPADLIST (cv);
164	AV *newpadlist, *newpad;	180	AV *newpadlist, *newpad;
165		181
166	newpadlist = newAV ();	182	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	183	AvREAL_off (newpadlist);
		184	#if PERL_VERSION_ATLEAST (5,9,0)
		185	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		186	#else
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	187	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		188	#endif
169	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	189	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170	--AvFILLp (padlist);	190	--AvFILLp (padlist);
171		191
172	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	192	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
173	av_store (newpadlist, 1, (SV *)newpad);	193	av_store (newpadlist, 1, (SV *)newpad);
174		194
175	return newpadlist;	195	return newpadlist;
176	}	196	}
177		197
178	static void	198	static void
179	free_padlist (pTHX_ AV *padlist)	199	free_padlist (AV *padlist)
180	{	200	{
181	/* may be during global destruction */	201	/* may be during global destruction */
182	if (SvREFCNT (padlist))	202	if (SvREFCNT (padlist))
183	{	203	{
184	I32 i = AvFILLp (padlist);	204	I32 i = AvFILLp (padlist);
…		…
205	AV *padlist;	225	AV *padlist;
206	AV *av = (AV *)mg->mg_obj;	226	AV *av = (AV *)mg->mg_obj;
207		227
208	/* casting is fun. */	228	/* casting is fun. */
209	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	229	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
210	free_padlist (aTHX_ padlist);	230	free_padlist (padlist);
211		231
212	SvREFCNT_dec (av);	232	SvREFCNT_dec (av);
213		233
214	return 0;	234	return 0;
215	}	235	}
216		236
217	#define PERL_MAGIC_coro PERL_MAGIC_ext	237	#define PERL_MAGIC_coro PERL_MAGIC_ext
218		238
219	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	239	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
220		240
		241	#define CORO_MAGIC(cv) \
		242	SvMAGIC (cv) \
		243	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		244	? SvMAGIC (cv) \
		245	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		246	: 0
		247
221	/* the next two functions merely cache the padlists */	248	/* the next two functions merely cache the padlists */
222	static void	249	static void
223	get_padlist (pTHX_ CV *cv)	250	get_padlist (CV *cv)
224	{	251	{
225	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	252	MAGIC *mg = CORO_MAGIC (cv);
		253	AV *av;
226		254
227	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	255	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
228	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	256	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229	else	257	else
230	{	258	{
231	#if 0	259	#if 0
232	/* this should work - but it doesn't :( */	260	/* this is probably cleaner, but also slower? */
233	CV *cp = Perl_cv_clone (aTHX_ cv);	261	CV *cp = Perl_cv_clone (cv);
234	CvPADLIST (cv) = CvPADLIST (cp);	262	CvPADLIST (cv) = CvPADLIST (cp);
235	CvPADLIST (cp) = 0;	263	CvPADLIST (cp) = 0;
236	SvREFCNT_dec (cp);	264	SvREFCNT_dec (cp);
237	#else	265	#else
238	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	266	CvPADLIST (cv) = coro_clone_padlist (cv);
239	#endif	267	#endif
240	}	268	}
241	}	269	}
242		270
243	static void	271	static void
244	put_padlist (pTHX_ CV *cv)	272	put_padlist (CV *cv)
245	{	273	{
246	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	274	MAGIC *mg = CORO_MAGIC (cv);
		275	AV *av;
247		276
248	if (!mg)	277	if (!mg)
249	{	278	{
250	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	279	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	280	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252	mg->mg_virtual = &vtbl_coro;	281	mg->mg_virtual = &vtbl_coro;
253	mg->mg_obj = (SV *)newAV ();	282	mg->mg_obj = (SV *)newAV ();
254	}	283	}
255		284
256	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	285	av = (AV *)mg->mg_obj;
		286
		287	if (AvFILLp (av) >= AvMAX (av))
		288	av_extend (av, AvMAX (av) + 1);
		289
		290	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
257	}	291	}
258		292
259	#define SB do {	293	#define SB do {
260	#define SE } while (0)	294	#define SE } while (0)
261		295
262	#define LOAD(state) load_state(aTHX_ (state));
263	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
264
265	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	296	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
266		297
267	static void	298	static void
268	load_state(pTHX_ Coro__State c)	299	load_perl (Coro__State c)
269	{	300	{
270	PL_dowarn = c->dowarn;	301	#define VAR(name,type) PL_ ## name = c->name;
271	PL_in_eval = c->in_eval;	302	# include "state.h"
272		303	#undef VAR
273	PL_curstackinfo = c->curstackinfo;
274	PL_curstack = c->curstack;
275	PL_mainstack = c->mainstack;
276	PL_stack_sp = c->stack_sp;
277	PL_op = c->op;
278	PL_curpad = c->curpad;
279	PL_comppad = c->comppad;
280	PL_compcv = c->compcv;
281	PL_stack_base = c->stack_base;
282	PL_stack_max = c->stack_max;
283	PL_tmps_stack = c->tmps_stack;
284	PL_tmps_floor = c->tmps_floor;
285	PL_tmps_ix = c->tmps_ix;
286	PL_tmps_max = c->tmps_max;
287	PL_markstack = c->markstack;
288	PL_markstack_ptr = c->markstack_ptr;
289	PL_markstack_max = c->markstack_max;
290	PL_scopestack = c->scopestack;
291	PL_scopestack_ix = c->scopestack_ix;
292	PL_scopestack_max = c->scopestack_max;
293	PL_savestack = c->savestack;
294	PL_savestack_ix = c->savestack_ix;
295	PL_savestack_max = c->savestack_max;
296	#if PERL_VERSION < 9
297	PL_retstack = c->retstack;
298	PL_retstack_ix = c->retstack_ix;
299	PL_retstack_max = c->retstack_max;
300	#endif
301	PL_curpm = c->curpm;
302	PL_curcop = c->curcop;
303	PL_top_env = c->top_env;
304		304
305	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	305	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
306	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	306	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
307	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	307	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		308	if (c->irssv)
		309	{
		310	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		311	SvREFCNT_dec (c->irssv);
		312	else
		313	{
		314	REPLACE_SV (PL_rs, c->irssv);
		315	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		316	sv_setsv (c->irssv_sv, PL_rs);
		317	}
		318	}
308		319
309	{	320	{
310	dSP;	321	dSP;
311	CV *cv;	322	CV *cv;
312		323
313	/* now do the ugly restore mess */	324	/* now do the ugly restore mess */
314	while ((cv = (CV *)POPs))	325	while ((cv = (CV *)POPs))
315	{	326	{
316	AV *padlist = (AV *)POPs;
317
318	if (padlist)
319	{
320	put_padlist (aTHX_ cv); /* mark this padlist as available */	327	put_padlist (cv); /* mark this padlist as available */
321	CvPADLIST(cv) = padlist;	328	CvDEPTH (cv) = PTR2IV (POPs);
322	}	329	CvPADLIST (cv) = (AV *)POPs;
323
324	++CvDEPTH(cv);
325	}	330	}
326		331
327	PUTBACK;	332	PUTBACK;
328	}	333	}
329	}	334	}
330		335
331	static void	336	static void
332	save_state(pTHX_ Coro__State c, int flags)	337	save_perl (Coro__State c)
333	{	338	{
334	{	339	{
335	dSP;	340	dSP;
336	I32 cxix = cxstack_ix;	341	I32 cxix = cxstack_ix;
337	PERL_CONTEXT *ccstk = cxstack;	342	PERL_CONTEXT *ccstk = cxstack;
…		…
348	{	353	{
349	while (cxix >= 0)	354	while (cxix >= 0)
350	{	355	{
351	PERL_CONTEXT *cx = &ccstk[cxix--];	356	PERL_CONTEXT *cx = &ccstk[cxix--];
352		357
353	if (CxTYPE(cx) == CXt_SUB)	358	if (CxTYPE (cx) == CXt_SUB)
354	{	359	{
355	CV *cv = cx->blk_sub.cv;	360	CV *cv = cx->blk_sub.cv;
		361
356	if (CvDEPTH(cv))	362	if (CvDEPTH (cv))
357	{	363	{
358	EXTEND (SP, CvDEPTH(cv)*2);	364	EXTEND (SP, 3);
359		365
360	while (--CvDEPTH(cv))
361	{
362	/* this tells the restore code to increment CvDEPTH */
363	PUSHs (Nullsv);
364	PUSHs ((SV *)cv);
365	}
366
367	PUSHs ((SV *)CvPADLIST(cv));	366	PUSHs ((SV *)CvPADLIST (cv));
		367	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
368	PUSHs ((SV *)cv);	368	PUSHs ((SV *)cv);
369		369
		370	CvDEPTH (cv) = 0;
370	get_padlist (aTHX_ cv);	371	get_padlist (cv);
371	}	372	}
372	}	373	}
373	#ifdef CXt_FORMAT	374	#ifdef CXt_FORMAT
374	else if (CxTYPE(cx) == CXt_FORMAT)	375	else if (CxTYPE (cx) == CXt_FORMAT)
375	{	376	{
376	/* I never used formats, so how should I know how these are implemented? */	377	/* I never used formats, so how should I know how these are implemented? */
377	/* my bold guess is as a simple, plain sub... */	378	/* my bold guess is as a simple, plain sub... */
378	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	379	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
379	}	380	}
…		…
389	}	390	}
390		391
391	PUTBACK;	392	PUTBACK;
392	}	393	}
393		394
394	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	395	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
395	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	396	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
396	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	397	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		398	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
397		399
398	c->dowarn = PL_dowarn;	400	#define VAR(name,type)c->name = PL_ ## name;
399	c->in_eval = PL_in_eval;	401	# include "state.h"
400		402	#undef VAR
401	c->curstackinfo = PL_curstackinfo;
402	c->curstack = PL_curstack;
403	c->mainstack = PL_mainstack;
404	c->stack_sp = PL_stack_sp;
405	c->op = PL_op;
406	c->curpad = PL_curpad;
407	c->comppad = PL_comppad;
408	c->compcv = PL_compcv;
409	c->stack_base = PL_stack_base;
410	c->stack_max = PL_stack_max;
411	c->tmps_stack = PL_tmps_stack;
412	c->tmps_floor = PL_tmps_floor;
413	c->tmps_ix = PL_tmps_ix;
414	c->tmps_max = PL_tmps_max;
415	c->markstack = PL_markstack;
416	c->markstack_ptr = PL_markstack_ptr;
417	c->markstack_max = PL_markstack_max;
418	c->scopestack = PL_scopestack;
419	c->scopestack_ix = PL_scopestack_ix;
420	c->scopestack_max = PL_scopestack_max;
421	c->savestack = PL_savestack;
422	c->savestack_ix = PL_savestack_ix;
423	c->savestack_max = PL_savestack_max;
424	#if PERL_VERSION < 9
425	c->retstack = PL_retstack;
426	c->retstack_ix = PL_retstack_ix;
427	c->retstack_max = PL_retstack_max;
428	#endif
429	c->curpm = PL_curpm;
430	c->curcop = PL_curcop;
431	c->top_env = PL_top_env;
432	}	403	}
433		404
434	/*	405	/*
435	* allocate various perl stacks. This is an exact copy	406	* allocate various perl stacks. This is an exact copy
436	* of perl.c:init_stacks, except that it uses less memory	407	* of perl.c:init_stacks, except that it uses less memory
437	* on the (sometimes correct) assumption that coroutines do	408	* on the (sometimes correct) assumption that coroutines do
438	* not usually need a lot of stackspace.	409	* not usually need a lot of stackspace.
439	*/	410	*/
440	static void	411	static void
441	coro_init_stacks (pTHX)	412	coro_init_stacks ()
442	{	413	{
443	LOCK;
444
445	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	414	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
446	PL_curstackinfo->si_type = PERLSI_MAIN;	415	PL_curstackinfo->si_type = PERLSI_MAIN;
447	PL_curstack = PL_curstackinfo->si_stack;	416	PL_curstack = PL_curstackinfo->si_stack;
448	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	417	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449		418
450	PL_stack_base = AvARRAY(PL_curstack);	419	PL_stack_base = AvARRAY(PL_curstack);
451	PL_stack_sp = PL_stack_base;	420	PL_stack_sp = PL_stack_base;
452	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	421	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453		422
454	New(50,PL_tmps_stack,96,SV*);	423	New(50,PL_tmps_stack,128,SV*);
455	PL_tmps_floor = -1;	424	PL_tmps_floor = -1;
456	PL_tmps_ix = -1;	425	PL_tmps_ix = -1;
457	PL_tmps_max = 96;	426	PL_tmps_max = 128;
458		427
459	New(54,PL_markstack,16,I32);	428	New(54,PL_markstack,32,I32);
460	PL_markstack_ptr = PL_markstack;	429	PL_markstack_ptr = PL_markstack;
461	PL_markstack_max = PL_markstack + 16;	430	PL_markstack_max = PL_markstack + 32;
462		431
463	#ifdef SET_MARK_OFFSET	432	#ifdef SET_MARK_OFFSET
464	SET_MARK_OFFSET;	433	SET_MARK_OFFSET;
465	#endif	434	#endif
466		435
467	New(54,PL_scopestack,16,I32);	436	New(54,PL_scopestack,32,I32);
468	PL_scopestack_ix = 0;	437	PL_scopestack_ix = 0;
469	PL_scopestack_max = 16;	438	PL_scopestack_max = 32;
470		439
471	New(54,PL_savestack,96,ANY);	440	New(54,PL_savestack,64,ANY);
472	PL_savestack_ix = 0;	441	PL_savestack_ix = 0;
473	PL_savestack_max = 96;	442	PL_savestack_max = 64;
474		443
475	#if PERL_VERSION < 9	444	#if !PERL_VERSION_ATLEAST (5,9,0)
476	New(54,PL_retstack,8,OP*);	445	New(54,PL_retstack,16,OP*);
477	PL_retstack_ix = 0;	446	PL_retstack_ix = 0;
478	PL_retstack_max = 8;	447	PL_retstack_max = 16;
479	#endif	448	#endif
480
481	UNLOCK;
482	}	449	}
483		450
484	/*	451	/*
485	* destroy the stacks, the callchain etc...	452	* destroy the stacks, the callchain etc...
486	*/	453	*/
487	static void	454	static void
488	destroy_stacks(pTHX)	455	coro_destroy_stacks ()
489	{	456	{
490	if (!IN_DESTRUCT)	457	if (!IN_DESTRUCT)
491	{	458	{
492	/* is this ugly, I ask? */	459	/* is this ugly, I ask? */
493	LEAVE_SCOPE (0);	460	LEAVE_SCOPE (0);
…		…
524		491
525	Safefree (PL_tmps_stack);	492	Safefree (PL_tmps_stack);
526	Safefree (PL_markstack);	493	Safefree (PL_markstack);
527	Safefree (PL_scopestack);	494	Safefree (PL_scopestack);
528	Safefree (PL_savestack);	495	Safefree (PL_savestack);
529	#if PERL_VERSION < 9	496	#if !PERL_VERSION_ATLEAST (5,9,0)
530	Safefree (PL_retstack);	497	Safefree (PL_retstack);
531	#endif	498	#endif
532	}	499	}
533		500
534	static void	501	static void
535	allocate_stack (Coro__State ctx, int alloc)	502	setup_coro (struct coro *coro)
536	{
537	coro_stack *stack;
538
539	New (0, stack, 1, coro_stack);
540
541	stack->refcnt = 1;
542	stack->usecnt = 1;
543	stack->gencnt = ctx->gencnt = 0;
544
545	if (alloc)
546	{
547	#if HAVE_MMAP
548	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
549	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
550	if (stack->sptr != (void *)-1)
551	{
552	# if STACKGUARD
553	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
554	# endif
555	}
556	else
557	#endif
558	{
559	stack->ssize = - (STACKSIZE * (long)sizeof (long));
560	New (0, stack->sptr, STACKSIZE, long);
561	}
562	}
563	else
564	stack->sptr = 0;
565
566	ctx->stack = stack;
567	}
568
569	static void
570	deallocate_stack (Coro__State ctx)
571	{
572	coro_stack *stack = ctx->stack;
573
574	ctx->stack = 0;
575
576	if (stack)
577	{
578	if (!--stack->refcnt)
579	{
580	#ifdef HAVE_MMAP
581	if (stack->ssize > 0 && stack->sptr)
582	munmap (stack->sptr, stack->ssize);
583	else
584	#endif
585	Safefree (stack->sptr);
586
587	Safefree (stack);
588	}
589	else if (ctx->gencnt == stack->gencnt)
590	--stack->usecnt;
591	}
592	}
593
594	static void
595	setup_coro (void *arg)
596	{	503	{
597	/*	504	/*
598	* emulate part of the perl startup here.	505	* emulate part of the perl startup here.
599	*/	506	*/
600	dTHX;	507
		508	coro_init_stacks ();
		509
		510	PL_curcop = &PL_compiling;
		511	PL_in_eval = EVAL_NULL;
		512	PL_curpm = 0;
		513	PL_localizing = 0;
		514	PL_dirty = 0;
		515	PL_restartop = 0;
		516
		517	{
		518	dSP;
		519	LOGOP myop;
		520
		521	SvREFCNT_dec (GvAV (PL_defgv));
		522	GvAV (PL_defgv) = coro->args; coro->args = 0;
		523
		524	Zero (&myop, 1, LOGOP);
		525	myop.op_next = Nullop;
		526	myop.op_flags = OPf_WANT_VOID;
		527
		528	PUSHMARK (SP);
		529	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		530	PUTBACK;
		531	PL_op = (OP *)&myop;
		532	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		533	SPAGAIN;
		534	}
		535
		536	ENTER; /* necessary e.g. for dounwind */
		537	}
		538
		539	static void
		540	free_coro_mortal ()
		541	{
		542	if (coro_mortal)
		543	{
		544	SvREFCNT_dec (coro_mortal);
		545	coro_mortal = 0;
		546	}
		547	}
		548
		549	/* inject a fake call to Coro::State::_cctx_init into the execution */
		550	static void NOINLINE
		551	prepare_cctx (coro_cctx *cctx)
		552	{
601	dSP;	553	dSP;
602	Coro__State ctx = (Coro__State)arg;	554	LOGOP myop;
603	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
604		555
605	coro_init_stacks (aTHX);	556	Zero (&myop, 1, LOGOP);
606	/*PL_curcop = 0;*/	557	myop.op_next = PL_op;
607	/*PL_in_eval = PL_in_eval;*/ /* inherit */	558	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
608	SvREFCNT_dec (GvAV (PL_defgv));
609	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
610		559
		560	PUSHMARK (SP);
		561	EXTEND (SP, 2);
		562	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		563	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		564	PUTBACK;
		565	PL_op = (OP *)&myop;
		566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
611	SPAGAIN;	567	SPAGAIN;
612
613	if (ctx->stack)
614	{
615	ctx->cursp = 0;
616
617	PUSHMARK(SP);
618	PUTBACK;
619	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
620
621	if (SvTRUE (ERRSV))
622	croak (NULL);
623	else
624	croak ("FATAL: CCTXT coroutine returned!");
625	}
626	else
627	{
628	UNOP myop;
629
630	PL_op = (OP *)&myop;
631
632	Zero(&myop, 1, UNOP);
633	myop.op_next = Nullop;
634	myop.op_flags = OPf_WANT_VOID;
635
636	PUSHMARK(SP);
637	XPUSHs (sub_init);
638	/*
639	* the next line is slightly wrong, as PL_op->op_next
640	* is actually being executed so we skip the first op.
641	* that doesn't matter, though, since it is only
642	* pp_nextstate and we never return...
643	* ah yes, and I don't care anyways ;)
644	*/
645	PUTBACK;
646	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
647	SPAGAIN;
648
649	ENTER; /* necessary e.g. for dounwind */
650	}
651	}	568	}
652		569
653	static void	570	static void
654	continue_coro (void *arg)	571	coro_run (void *arg)
655	{	572	{
		573	/* coro_run is the alternative tail of transfer(), so unlock here. */
		574	UNLOCK;
		575
656	/*	576	/*
657	* this is a _very_ stripped down perl interpreter ;)	577	* this is a _very_ stripped down perl interpreter ;)
658	*/	578	*/
659	dTHX;
660	Coro__State ctx = (Coro__State)arg;
661
662	PL_top_env = &ctx->start_env;	579	PL_top_env = &PL_start_env;
663		580
664	ctx->cursp = 0;	581	/* inject call to cctx_init */
665	PL_op = PL_op->op_next;	582	prepare_cctx ((coro_cctx *)arg);
666	CALLRUNOPS(aTHX);
667		583
		584	/* somebody will hit me for both perl_run and PL_restartop */
		585	PL_restartop = PL_op;
		586	perl_run (PL_curinterp);
		587
		588	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
668	abort ();	589	abort ();
669	}	590	}
670		591
		592	static coro_cctx *
		593	cctx_new ()
		594	{
		595	coro_cctx *cctx;
		596
		597	++cctx_count;
		598
		599	Newz (0, cctx, 1, coro_cctx);
		600
		601	#if HAVE_MMAP
		602
		603	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		604	/* mmap supposedly does allocate-on-write for us */
		605	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		606
		607	if (cctx->sptr == (void *)-1)
		608	{
		609	perror ("FATAL: unable to mmap stack for coroutine");
		610	_exit (EXIT_FAILURE);
		611	}
		612
		613	# if STACKGUARD
		614	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		615	# endif
		616
		617	#else
		618
		619	cctx->ssize = STACKSIZE * (long)sizeof (long);
		620	New (0, cctx->sptr, STACKSIZE, long);
		621
		622	if (!cctx->sptr)
		623	{
		624	perror ("FATAL: unable to malloc stack for coroutine");
		625	_exit (EXIT_FAILURE);
		626	}
		627
		628	#endif
		629
		630	#if USE_VALGRIND
		631	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		632	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		633	cctx->ssize + (char *)cctx->sptr
		634	);
		635	#endif
		636
		637	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		638
		639	return cctx;
		640	}
		641
671	static void	642	static void
		643	cctx_destroy (coro_cctx *cctx)
		644	{
		645	if (!cctx)
		646	return;
		647
		648	--cctx_count;
		649
		650	#if USE_VALGRIND
		651	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		652	#endif
		653
		654	#if HAVE_MMAP
		655	munmap (cctx->sptr, cctx->ssize);
		656	#else
		657	Safefree (cctx->sptr);
		658	#endif
		659
		660	Safefree (cctx);
		661	}
		662
		663	static coro_cctx *
		664	cctx_get ()
		665	{
		666	coro_cctx *cctx;
		667
		668	if (cctx_first)
		669	{
		670	cctx = cctx_first;
		671	cctx_first = cctx->next;
		672	--cctx_idle;
		673	}
		674	else
		675	{
		676	cctx = cctx_new ();
		677	PL_op = PL_op->op_next;
		678	}
		679
		680	return cctx;
		681	}
		682
		683	static void
		684	cctx_put (coro_cctx *cctx)
		685	{
		686	/* free another cctx if overlimit */
		687	if (cctx_idle >= MAX_IDLE_CCTX)
		688	{
		689	coro_cctx *first = cctx_first;
		690	cctx_first = first->next;
		691	--cctx_idle;
		692
		693	assert (!first->inuse);
		694	cctx_destroy (first);
		695	}
		696
		697	++cctx_idle;
		698	cctx->next = cctx_first;
		699	cctx_first = cctx;
		700	}
		701
		702	/* never call directly, always through the coro_state_transfer global variable */
		703	static void NOINLINE
672	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	704	transfer (struct coro *prev, struct coro *next)
673	{	705	{
674	dSTACKLEVEL;	706	dSTACKLEVEL;
675		707
		708	/* sometimes transfer is only called to set idle_sp */
		709	if (!next)
		710	{
		711	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		712	assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */
		713	}
676	if (prev != next)	714	else if (prev != next)
677	{	715	{
678	if (next->mainstack)	716	coro_cctx *prev__cctx;
		717
		718	if (prev->flags & CF_NEW)
679	{	719	{
680	LOCK;	720	/* create a new empty context */
681	SAVE (prev, flags);	721	Newz (0, prev->cctx, 1, coro_cctx);
682	LOAD (next);	722	prev->cctx->inuse = 1;
683	UNLOCK;	723	prev->flags &= ~CF_NEW;
684		724	prev->flags |= CF_RUNNING;
685	/* mark this state as in-use */
686	next->mainstack = 0;
687	next->tmps_ix = -2;
688
689	/* stacklevel changed? if yes, grab the stack for us! */
690	if (flags & TRANSFER_SAVE_CCTXT)
691	{
692	if (!prev->stack)
693	allocate_stack (prev, 0);
694	else if (prev->cursp != stacklevel
695	&& prev->stack->usecnt > 1)
696	{
697	prev->gencnt = ++prev->stack->gencnt;
698	prev->stack->usecnt = 1;
699	}
700
701	/* has our stack been invalidated? */
702	if (next->stack && next->stack->gencnt != next->gencnt)
703	{
704	deallocate_stack (next);
705	allocate_stack (next, 1);
706	coro_create (&(next->stack->cctx),
707	continue_coro, (void *)next,
708	next->stack->sptr, labs (next->stack->ssize));
709	}
710
711	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712	prev->cursp = stacklevel;
713	/* don't add any code here */
714	}
715	else
716	next->cursp = stacklevel;
717	}	725	}
718	else if (next->tmps_ix == -2)	726
719	croak ("tried to transfer to running coroutine");	727	/*TODO: must not croak here */
		728	if (!prev->flags & CF_RUNNING)
		729	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		730
		731	if (next->flags & CF_RUNNING)
		732	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		733
		734	prev->flags &= ~CF_RUNNING;
		735	next->flags |= CF_RUNNING;
		736
		737	LOCK;
		738
		739	if (next->flags & CF_NEW)
		740	{
		741	/* need to start coroutine */
		742	next->flags &= ~CF_NEW;
		743	/* first get rid of the old state */
		744	save_perl (prev);
		745	/* setup coroutine call */
		746	setup_coro (next);
		747	/* need a new stack */
		748	assert (!next->cctx);
		749	}
720	else	750	else
721	{	751	{
722	LOCK;	752	/* coroutine already started */
723	SAVE (prev, -1); /* first get rid of the old state */	753	save_perl (prev);
724	UNLOCK;	754	load_perl (next);
725
726	if (flags & TRANSFER_SAVE_CCTXT)
727	{
728	if (!prev->stack)
729	allocate_stack (prev, 0);
730
731	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732	{
733	PL_top_env = &next->start_env;
734
735	setup_coro (next);
736	next->cursp = stacklevel;
737
738	prev->stack->refcnt++;
739	prev->stack->usecnt++;
740	next->stack = prev->stack;
741	next->gencnt = prev->gencnt;
742	}
743	else
744	{
745	assert (!next->stack);
746	allocate_stack (next, 1);
747	coro_create (&(next->stack->cctx),
748	setup_coro, (void *)next,
749	next->stack->sptr, labs (next->stack->ssize));
750	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751	prev->cursp = stacklevel;
752	/* don't add any code here */
753	}
754	}
755	else
756	{
757	setup_coro (next);
758	next->cursp = stacklevel;
759	}
760	}	755	}
		756
		757	prev__cctx = prev->cctx;
		758
		759	/* possibly "free" the cctx */
		760	if (prev__cctx->idle_sp == STACKLEVEL)
		761	{
		762	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		763	assert (PL_top_env == prev__cctx->top_env);
		764
		765	prev->cctx = 0;
		766
		767	cctx_put (prev__cctx);
		768	prev__cctx->inuse = 0;
		769	}
		770
		771	if (!next->cctx)
		772	{
		773	next->cctx = cctx_get ();
		774	assert (!next->cctx->inuse);
		775	next->cctx->inuse = 1;
		776	}
		777
		778	if (prev__cctx != next->cctx)
		779	{
		780	prev__cctx->top_env = PL_top_env;
		781	PL_top_env = next->cctx->top_env;
		782	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		783	}
		784
		785	free_coro_mortal ();
		786
		787	UNLOCK;
761	}	788	}
		789	}
762		790
763	LOCK;	791	struct transfer_args
764	if (coro_mortal)	792	{
		793	struct coro *prev, *next;
		794	};
		795
		796	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
		797
		798	static void
		799	coro_state_destroy (struct coro *coro)
		800	{
		801	if (coro->refcnt--)
		802	return;
		803
		804	if (coro->mainstack && coro->mainstack != main_mainstack)
765	{	805	{
766	SvREFCNT_dec (coro_mortal);	806	struct coro temp;
		807	Zero (&temp, 1, struct coro);
		808	temp.save = CORO_SAVE_ALL;
		809
		810	if (coro->flags & CF_RUNNING)
		811	croak ("FATAL: tried to destroy currently running coroutine");
		812
		813	save_perl (&temp);
		814	load_perl (coro);
		815
		816	coro_destroy_stacks ();
		817
		818	load_perl (&temp); /* this will get rid of defsv etc.. */
		819
767	coro_mortal = 0;	820	coro->mainstack = 0;
768	}	821	}
769	UNLOCK;
770	}
771		822
772	#define SV_CORO(sv,func) \	823	cctx_destroy (coro->cctx);
773	do { \	824	SvREFCNT_dec (coro->args);
774	if (SvROK (sv)) \	825	Safefree (coro);
775	sv = SvRV (sv); \	826	}
776	\
777	if (SvTYPE (sv) == SVt_PVHV) \
778	{ \
779	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
780	\
781	if (!he) \
782	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
783	\
784	(sv) = SvRV (HeVAL(he)); \
785	} \
786	\
787	/* must also be changed inside Coro::Cont::yield */ \
788	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
789	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
790	\
791	} while(0)
792		827
793	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))
794
795	static void	828	static int
		829	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		830	{
		831	struct coro *coro = (struct coro *)mg->mg_ptr;
		832	mg->mg_ptr = 0;
		833
		834	coro_state_destroy (coro);
		835
		836	return 0;
		837	}
		838
		839	static int
		840	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		841	{
		842	struct coro *coro = (struct coro *)mg->mg_ptr;
		843
		844	++coro->refcnt;
		845
		846	return 0;
		847	}
		848
		849	static MGVTBL coro_state_vtbl = {
		850	0, 0, 0, 0,
		851	coro_state_clear,
		852	0,
		853	#ifdef MGf_DUP
		854	coro_state_dup,
		855	#else
		856	# define MGf_DUP 0
		857	#endif
		858	};
		859
		860	static struct coro *
		861	SvSTATE (SV *coro)
		862	{
		863	HV *stash;
		864	MAGIC *mg;
		865
		866	if (SvROK (coro))
		867	coro = SvRV (coro);
		868
		869	stash = SvSTASH (coro);
		870	if (stash != coro_stash && stash != coro_state_stash)
		871	{
		872	/* very slow, but rare, check */
		873	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		874	croak ("Coro::State object required");
		875	}
		876
		877	mg = SvMAGIC (coro);
		878	assert (mg->mg_type == PERL_MAGIC_ext);
		879	return (struct coro *)mg->mg_ptr;
		880	}
		881
		882	static void
		883	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		884	{
		885	ta->prev = SvSTATE (prev_sv);
		886	ta->next = SvSTATE (next_sv);
		887	}
		888
		889	static void
796	api_transfer(pTHX_ SV *prev, SV *next, int flags)	890	api_transfer (SV *prev_sv, SV *next_sv)
797	{	891	{
798	SV_CORO (prev, "Coro::transfer");	892	struct transfer_args ta;
799	SV_CORO (next, "Coro::transfer");
800		893
801	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	894	prepare_transfer (&ta, prev_sv, next_sv);
		895	TRANSFER (ta);
		896	}
		897
		898	static int
		899	api_save (SV *coro_sv, int new_save)
		900	{
		901	struct coro *coro = SvSTATE (coro_sv);
		902	int old_save = coro->save;
		903
		904	if (new_save >= 0)
		905	coro->save = new_save;
		906
		907	return old_save;
802	}	908	}
803		909
804	/** Coro ********************************************************************/	910	/** Coro ********************************************************************/
805		911
806	#define PRIO_MAX 3	912	#define PRIO_MAX 3
…		…
809	#define PRIO_LOW -1	915	#define PRIO_LOW -1
810	#define PRIO_IDLE -3	916	#define PRIO_IDLE -3
811	#define PRIO_MIN -4	917	#define PRIO_MIN -4
812		918
813	/* for Coro.pm */	919	/* for Coro.pm */
814	static GV *coro_current, *coro_idle;	920	static SV *coro_current;
815	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	921	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
816	static int coro_nready;	922	static int coro_nready;
817		923
818	static void	924	static void
819	coro_enq (pTHX_ SV *sv)	925	coro_enq (SV *coro_sv)
820	{	926	{
821	SV **xprio;
822	int prio;
823
824	if (SvTYPE (sv) != SVt_PVHV)
825	croak ("Coro::ready tried to enqueue something that is not a coroutine");
826
827	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
828	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
829
830	prio = prio > PRIO_MAX ? PRIO_MAX
831	: prio < PRIO_MIN ? PRIO_MIN
832	: prio;
833
834	av_push (coro_ready [prio - PRIO_MIN], sv);	927	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
835	coro_nready++;	928	coro_nready++;
836	}	929	}
837		930
838	static SV *	931	static SV *
839	coro_deq (pTHX_ int min_prio)	932	coro_deq (int min_prio)
840	{	933	{
841	int prio = PRIO_MAX - PRIO_MIN;	934	int prio = PRIO_MAX - PRIO_MIN;
842		935
843	min_prio -= PRIO_MIN;	936	min_prio -= PRIO_MIN;
844	if (min_prio < 0)	937	if (min_prio < 0)
845	min_prio = 0;	938	min_prio = 0;
846		939
847	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	940	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
848	if (av_len (coro_ready[prio]) >= 0)	941	if (AvFILLp (coro_ready [prio]) >= 0)
849	{	942	{
850	coro_nready--;	943	coro_nready--;
851	return av_shift (coro_ready[prio]);	944	return av_shift (coro_ready [prio]);
852	}	945	}
853		946
854	return 0;	947	return 0;
855	}	948	}
856		949
857	static void	950	static int
858	api_ready (SV *coro)	951	api_ready (SV *coro_sv)
859	{	952	{
860	dTHX;	953	struct coro *coro;
861		954
862	if (SvROK (coro))	955	if (SvROK (coro_sv))
863	coro = SvRV (coro);	956	coro_sv = SvRV (coro_sv);
		957
		958	coro = SvSTATE (coro_sv);
		959
		960	if (coro->flags & CF_READY)
		961	return 0;
		962
		963	#if 0 /* this is actually harmless */
		964	if (coro->flags & CF_RUNNING)
		965	croak ("Coro::ready called on currently running coroutine");
		966	#endif
		967
		968	coro->flags |= CF_READY;
864		969
865	LOCK;	970	LOCK;
866	coro_enq (aTHX_ SvREFCNT_inc (coro));	971	coro_enq (SvREFCNT_inc (coro_sv));
867	UNLOCK;	972	UNLOCK;
		973
		974	return 1;
		975	}
		976
		977	static int
		978	api_is_ready (SV *coro_sv)
		979	{
		980	return !!SvSTATE (coro_sv)->flags & CF_READY;
		981	}
		982
		983	static void
		984	prepare_schedule (struct transfer_args *ta)
		985	{
		986	SV *prev, *next;
		987
		988	for (;;)
		989	{
		990	LOCK;
		991	next = coro_deq (PRIO_MIN);
		992	UNLOCK;
		993
		994	if (next)
		995	break;
		996
		997	{
		998	dSP;
		999
		1000	ENTER;
		1001	SAVETMPS;
		1002
		1003	PUSHMARK (SP);
		1004	PUTBACK;
		1005	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1006
		1007	FREETMPS;
		1008	LEAVE;
		1009	}
		1010	}
		1011
		1012	prev = SvRV (coro_current);
		1013	SvRV_set (coro_current, next);
		1014
		1015	/* free this only after the transfer */
		1016	LOCK;
		1017	free_coro_mortal ();
		1018	UNLOCK;
		1019	coro_mortal = prev;
		1020
		1021	assert (!SvROK(prev));//D
		1022	assert (!SvROK(next));//D
		1023
		1024	ta->prev = SvSTATE (prev);
		1025	ta->next = SvSTATE (next);
		1026
		1027	assert (ta->next->flags & CF_READY);
		1028	ta->next->flags &= ~CF_READY;
		1029	}
		1030
		1031	static void
		1032	prepare_cede (struct transfer_args *ta)
		1033	{
		1034	api_ready (coro_current);
		1035
		1036	prepare_schedule (ta);
868	}	1037	}
869		1038
870	static void	1039	static void
871	api_schedule (void)	1040	api_schedule (void)
872	{	1041	{
873	dTHX;	1042	struct transfer_args ta;
874		1043
875	SV *prev, *next;	1044	prepare_schedule (&ta);
876		1045	TRANSFER (ta);
877	LOCK;
878
879	prev = SvRV (GvSV (coro_current));
880	next = coro_deq (aTHX_ PRIO_MIN);
881
882	if (!next)
883	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
884
885	/* free this only after the transfer */
886	coro_mortal = prev;
887	SV_CORO (prev, "Coro::schedule");
888
889	SvRV (GvSV (coro_current)) = next;
890
891	SV_CORO (next, "Coro::schedule");
892
893	UNLOCK;
894
895	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
896	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
897	}	1046	}
898		1047
899	static void	1048	static void
900	api_cede (void)	1049	api_cede (void)
901	{	1050	{
902	dTHX;	1051	struct transfer_args ta;
903		1052
904	LOCK;	1053	prepare_cede (&ta);
905	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1054	TRANSFER (ta);
906	UNLOCK;
907
908	api_schedule ();
909	}	1055	}
910		1056
911	MODULE = Coro::State PACKAGE = Coro::State	1057	MODULE = Coro::State PACKAGE = Coro::State
912		1058
913	PROTOTYPES: ENABLE	1059	PROTOTYPES: DISABLE
914		1060
915	BOOT:	1061	BOOT:
916	{ /* {} necessary for stoopid perl-5.6.x */	1062	{
917	#ifdef USE_ITHREADS	1063	#ifdef USE_ITHREADS
918	MUTEX_INIT (&coro_mutex);	1064	MUTEX_INIT (&coro_mutex);
919	#endif	1065	#endif
920	BOOT_PAGESIZE;	1066	BOOT_PAGESIZE;
921		1067
922	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
923	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
924	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1068	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
925		1069
926	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1070	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
927	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1071	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
928	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1072	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1073	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
929	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1074	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
930		1075
931	main_mainstack = PL_mainstack;	1076	main_mainstack = PL_mainstack;
932		1077
933	coroapi.ver = CORO_API_VERSION;	1078	coroapi.ver = CORO_API_VERSION;
934	coroapi.transfer = api_transfer;	1079	coroapi.transfer = api_transfer;
935	}
936		1080
937	Coro::State	1081	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
938	_newprocess(args)	1082	}
939	SV * args	1083
940	PROTOTYPE: $	1084	SV *
		1085	new (char *klass, ...)
941	CODE:	1086	CODE:
942	Coro__State coro;	1087	{
		1088	struct coro *coro;
		1089	HV *hv;
		1090	int i;
943		1091
944	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
945	croak ("Coro::State::_newprocess expects an arrayref");
946
947	Newz (0, coro, 1, struct coro);	1092	Newz (0, coro, 1, struct coro);
		1093	coro->args = newAV ();
		1094	coro->save = CORO_SAVE_ALL;
		1095	coro->flags = CF_NEW;
948		1096
949	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1097	hv = newHV ();
950	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1098	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
951	/*coro->stack = 0;*/	1099	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
952		1100
953	/* same as JMPENV_BOOTSTRAP */	1101	for (i = 1; i < items; i++)
954	/* we might be able to recycle start_env, but safe is safe */	1102	av_push (coro->args, newSVsv (ST (i)));
955	/*Zero(&coro->start_env, 1, JMPENV);*/	1103	}
956	coro->start_env.je_ret = -1;
957	coro->start_env.je_mustcatch = TRUE;
958
959	RETVAL = coro;
960	OUTPUT:	1104	OUTPUT:
961	RETVAL	1105	RETVAL
962		1106
		1107	int
		1108	save (SV *coro, int new_save = -1)
		1109	CODE:
		1110	RETVAL = api_save (coro, new_save);
		1111	OUTPUT:
		1112	RETVAL
		1113
963	void	1114	void
964	transfer(prev, next, flags)	1115	_set_stacklevel (...)
965	SV *prev	1116	ALIAS:
966	SV *next	1117	Coro::State::transfer = 1
967	int flags	1118	Coro::schedule = 2
968	PROTOTYPE: @	1119	Coro::cede = 3
969	CODE:	1120	CODE:
970	PUTBACK;	1121	{
971	SV_CORO (next, "Coro::transfer");	1122	struct transfer_args ta;
972	SV_CORO (prev, "Coro::transfer");	1123
973	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1124	switch (ix)
974	SPAGAIN;	1125	{
		1126	case 0:
		1127	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1128	ta.next = 0;
		1129	break;
		1130
		1131	case 1:
		1132	if (items != 2)
		1133	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1134
		1135	prepare_transfer (&ta, ST (0), ST (1));
		1136	break;
		1137
		1138	case 2:
		1139	prepare_schedule (&ta);
		1140	break;
		1141
		1142	case 3:
		1143	prepare_cede (&ta);
		1144	break;
		1145	}
		1146
		1147	TRANSFER (ta);
		1148	}
975		1149
976	void	1150	void
977	DESTROY(coro)	1151	_clone_state_from (SV *dst, SV *src)
978	Coro::State coro	1152	CODE:
979	CODE:	1153	{
		1154	struct coro *coro_src = SvSTATE (src);
980		1155
981	if (coro->mainstack && coro->mainstack != main_mainstack)	1156	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
982	{
983	struct coro temp;
984		1157
985	PUTBACK;	1158	++coro_src->refcnt;
986	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1159	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
987	LOAD (aTHX_ coro);	1160	}
988	SPAGAIN;
989
990	destroy_stacks (aTHX);
991
992	LOAD ((&temp)); /* this will get rid of defsv etc.. */
993	SPAGAIN;
994
995	coro->mainstack = 0;
996	}
997
998	deallocate_stack (coro);
999	SvREFCNT_dec (coro->args);
1000	Safefree (coro);
1001		1161
1002	void	1162	void
1003	_exit(code)	1163	_exit (code)
1004	int code	1164	int code
1005	PROTOTYPE: $	1165	PROTOTYPE: $
1006	CODE:	1166	CODE:
1007	_exit (code);	1167	_exit (code);
1008		1168
1009	MODULE = Coro::State PACKAGE = Coro::Cont	1169	int
		1170	cctx_count ()
		1171	CODE:
		1172	RETVAL = cctx_count;
		1173	OUTPUT:
		1174	RETVAL
1010		1175
1011	# this is slightly dirty (should expose a c-level api)	1176	int
1012		1177	cctx_idle ()
1013	void	1178	CODE:
1014	yield(...)	1179	RETVAL = cctx_idle;
1015	PROTOTYPE: @	1180	OUTPUT:
1016	CODE:	1181	RETVAL
1017	SV *yieldstack;
1018	SV *sv;
1019	AV *defav = GvAV (PL_defgv);
1020	struct coro *prev, *next;
1021
1022	yieldstack = *hv_fetch (
1023	(HV *)SvRV (GvSV (coro_current)),
1024	"yieldstack", sizeof ("yieldstack") - 1,
1025	0
1026	);
1027
1028	/* set up @_ -- ugly */
1029	av_clear (defav);
1030	av_fill (defav, items - 1);
1031	while (items--)
1032	av_store (defav, items, SvREFCNT_inc (ST(items)));
1033
1034	sv = av_pop ((AV *)SvRV (yieldstack));
1035	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1036	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1037	SvREFCNT_dec (sv);
1038
1039	transfer (aTHX_ prev, next, 0);
1040		1182
1041	MODULE = Coro::State PACKAGE = Coro	1183	MODULE = Coro::State PACKAGE = Coro
1042		1184
1043	# this is slightly dirty (should expose a c-level api)
1044
1045	BOOT:	1185	BOOT:
1046	{	1186	{
1047	int i;	1187	int i;
		1188
1048	HV *stash = gv_stashpv ("Coro", TRUE);	1189	coro_stash = gv_stashpv ("Coro", TRUE);
1049		1190
1050	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1191	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1051	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1192	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1052	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1193	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1053	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1194	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1054	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1195	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1055	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1196	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1056		1197
1057	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1198	coro_current = get_sv ("Coro::current", FALSE);
1058	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1199	SvREADONLY_on (coro_current);
1059		1200
1060	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1201	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1061	coro_ready[i] = newAV ();	1202	coro_ready[i] = newAV ();
1062		1203
1063	{	1204	{
1064	SV *sv = perl_get_sv("Coro::API", 1);	1205	SV *sv = perl_get_sv("Coro::API", 1);
1065		1206
1066	coroapi.schedule = api_schedule;	1207	coroapi.schedule = api_schedule;
		1208	coroapi.save = api_save;
1067	coroapi.cede = api_cede;	1209	coroapi.cede = api_cede;
1068	coroapi.ready = api_ready;	1210	coroapi.ready = api_ready;
		1211	coroapi.is_ready = api_is_ready;
1069	coroapi.nready = &coro_nready;	1212	coroapi.nready = &coro_nready;
1070	coroapi.current = coro_current;	1213	coroapi.current = coro_current;
1071		1214
1072	GCoroAPI = &coroapi;	1215	GCoroAPI = &coroapi;
1073	sv_setiv(sv, (IV)&coroapi);	1216	sv_setiv (sv, (IV)&coroapi);
1074	SvREADONLY_on(sv);	1217	SvREADONLY_on (sv);
1075	}	1218	}
1076	}	1219	}
1077		1220
1078	#if !PERL_MICRO
1079
1080	void	1221	void
1081	ready(self)	1222	_set_current (SV *current)
1082	SV * self
1083	PROTOTYPE: $	1223	PROTOTYPE: $
1084	CODE:	1224	CODE:
1085	api_ready (self);	1225	SvREFCNT_dec (SvRV (coro_current));
1086		1226	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1087	#endif
1088		1227
1089	int	1228	int
		1229	prio (Coro::State coro, int newprio = 0)
		1230	ALIAS:
		1231	nice = 1
		1232	CODE:
		1233	{
		1234	RETVAL = coro->prio;
		1235
		1236	if (items > 1)
		1237	{
		1238	if (ix)
		1239	newprio += coro->prio;
		1240
		1241	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1242	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1243
		1244	coro->prio = newprio;
		1245	}
		1246	}
		1247
		1248	SV *
		1249	ready (SV *self)
		1250	PROTOTYPE: $
		1251	CODE:
		1252	RETVAL = boolSV (api_ready (self));
		1253	OUTPUT:
		1254	RETVAL
		1255
		1256	SV *
		1257	is_ready (SV *self)
		1258	PROTOTYPE: $
		1259	CODE:
		1260	RETVAL = boolSV (api_is_ready (self));
		1261	OUTPUT:
		1262	RETVAL
		1263
		1264	int
1090	nready(...)	1265	nready (...)
1091	PROTOTYPE:	1266	PROTOTYPE:
1092	CODE:	1267	CODE:
1093	RETVAL = coro_nready;	1268	RETVAL = coro_nready;
1094	OUTPUT:	1269	OUTPUT:
1095	RETVAL	1270	RETVAL
1096		1271
1097	void	1272	MODULE = Coro::State PACKAGE = Coro::AIO
1098	schedule(...)	1273
1099	PROTOTYPE:	1274	SV *
		1275	_get_state ()
1100	CODE:	1276	CODE:
1101	api_schedule ();
1102
1103	void
1104	cede(...)
1105	PROTOTYPE:
1106	CODE:
1107	api_cede ();
1108
1109	# and these are hacks
1110	SV *
1111	_aio_get_state ()
1112	CODE:
1113	{	1277	{
1114	struct {	1278	struct io_state *data;
1115	int errorno;
1116	int laststype;
1117	int laststatval;
1118	Stat_t statcache;
1119	} data;
1120		1279
		1280	RETVAL = newSV (sizeof (struct io_state));
		1281	data = (struct io_state *)SvPVX (RETVAL);
		1282	SvCUR_set (RETVAL, sizeof (struct io_state));
		1283	SvPOK_only (RETVAL);
		1284
1121	data.errorno = errno;	1285	data->errorno = errno;
1122	data.laststype = PL_laststype;	1286	data->laststype = PL_laststype;
1123	data.laststatval = PL_laststatval;	1287	data->laststatval = PL_laststatval;
1124	data.statcache = PL_statcache;	1288	data->statcache = PL_statcache;
1125
1126	RETVAL = newSVpvn ((char *)&data, sizeof data);
1127	}	1289	}
1128	OUTPUT:	1290	OUTPUT:
1129	RETVAL	1291	RETVAL
1130		1292
1131	void	1293	void
1132	_aio_set_state (char *data_)	1294	_set_state (char *data_)
1133	PROTOTYPE: $	1295	PROTOTYPE: $
1134	CODE:	1296	CODE:
1135	{	1297	{
1136	struct {	1298	struct io_state *data = (void *)data_;
1137	int errorno;
1138	int laststype;
1139	int laststatval;
1140	Stat_t statcache;
1141	} *data = (void *)data_;
1142		1299
1143	errno = data->errorno;	1300	errno = data->errorno;
1144	PL_laststype = data->laststype;	1301	PL_laststype = data->laststype;
1145	PL_laststatval = data->laststatval;	1302	PL_laststatval = data->laststatval;
1146	PL_statcache = data->statcache;	1303	PL_statcache = data->statcache;
1147	}	1304	}
		1305

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