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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.77 by root, Tue Oct 31 23:55:33 2006 UTC vs.
Revision 1.119 by root, Sat Dec 2 15:41:28 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
		46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		47	# undef STACKGUARD
		48	#endif
		49
		50	#ifndef STACKGUARD
		51	# define STACKGUARD 0
		52	#endif
33		53
34	#ifdef HAVE_MMAP	54	#ifdef HAVE_MMAP
35	# include <unistd.h>	55	# include <unistd.h>
36	# include <sys/mman.h>	56	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS	57	# ifndef MAP_ANONYMOUS
…		…
39	# define MAP_ANONYMOUS MAP_ANON	59	# define MAP_ANONYMOUS MAP_ANON
40	# else	60	# else
41	# undef HAVE_MMAP	61	# undef HAVE_MMAP
42	# endif	62	# endif
43	# endif	63	# endif
		64	# include <limits.h>
		65	# ifndef PAGESIZE
		66	# define PAGESIZE pagesize
		67	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		68	static long pagesize;
		69	# else
		70	# define BOOT_PAGESIZE (void)0
44	#endif	71	# endif
45		72	#else
46	#define SUB_INIT "Coro::State::initialize"	73	# define PAGESIZE 0
47	#define UCORO_STATE "_coro_state"	74	# define BOOT_PAGESIZE (void)0
		75	#endif
48		76
49	/* The next macro should declare a variable stacklevel that contains and approximation	77	/* The next macro should declare a variable stacklevel that contains and approximation
50	* to the current C stack pointer. Its property is that it changes with each call	78	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	79	* and should be unique. */
		80	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	81	#define STACKLEVEL ((void *)&stacklevel)
53		82
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	83	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		84
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	85	#if __GNUC__ >= 3
		86	# define attribute(x) __attribute__(x)
		87	#else
		88	# define attribute(x)
		89	#endif
		90
		91	#define NOINLINE attribute ((noinline))
57		92
58	#include "CoroAPI.h"	93	#include "CoroAPI.h"
		94
		95	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59		96
60	#ifdef USE_ITHREADS	97	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	98	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	99	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	100	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
66	# define UNLOCK (void)0	103	# define UNLOCK (void)0
67	#endif	104	#endif
68		105
69	static struct CoroAPI coroapi;	106	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	107	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	108	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV *coro_mortal; /* will be freed after next transfer */	109	static SV *coro_mortal; /* will be freed after next transfer */
75		110
76	/* this is actually not only the c stack but also c registers etc... */	111	static struct coro_cctx *cctx_first;
		112	static int cctx_count, cctx_idle;
		113
		114	/* this is a structure representing a c-level coroutine */
77	typedef struct {	115	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	116	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		117
82	coro_context cctx;	118	/* the stack */
83
84	void *sptr;	119	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	120	long ssize; /* positive == mmap, otherwise malloc */
86	} coro_stack;
87		121
		122	/* cpu state */
		123	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		124	JMPENV *top_env;
		125	coro_context cctx;
		126
		127	int inuse;
		128
		129	#if USE_VALGRIND
		130	int valgrind_id;
		131	#endif
		132	} coro_cctx;
		133
		134	enum {
		135	CF_RUNNING = 0x0001, /* coroutine is running */
		136	CF_READY = 0x0002, /* coroutine is ready */
		137	CF_NEW = 0x0004, /* ahs never been switched to */
		138	};
		139
		140	/* this is a structure representing a perl-level coroutine */
88	struct coro {	141	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	142	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	143	coro_cctx *cctx;
91		144
92	/* the optional C context */	145	/* data associated with this coroutine (initial args) */
93	coro_stack *stack;	146	AV *args;
94	void *cursp;
95	int gencnt;	147	int refcnt;
		148	int flags;
96		149
97	/* optionally saved, might be zero */	150	/* optionally saved, might be zero */
98	AV *defav;	151	AV *defav;
99	SV *defsv;	152	SV *defsv;
100	SV *errsv;	153	SV *errsv;
101		154
102	/* saved global state not related to stacks */	155	#define VAR(name,type) type name;
103	U8 dowarn;	156	# include "state.h"
104	I32 in_eval;	157	#undef VAR
105		158
106	/* the stacks and related info (callchain etc..) */	159	/* coro process data */
107	PERL_SI *curstackinfo;	160	int prio;
108	AV *curstack;
109	AV *mainstack;
110	SV **stack_sp;
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	CV *compcv;
115	SV **stack_base;
116	SV **stack_max;
117	SV **tmps_stack;
118	I32 tmps_floor;
119	I32 tmps_ix;
120	I32 tmps_max;
121	I32 *markstack;
122	I32 *markstack_ptr;
123	I32 *markstack_max;
124	I32 *scopestack;
125	I32 scopestack_ix;
126	I32 scopestack_max;
127	ANY *savestack;
128	I32 savestack_ix;
129	I32 savestack_max;
130	OP **retstack;
131	I32 retstack_ix;
132	I32 retstack_max;
133	PMOP *curpm;
134	COP *curcop;
135	JMPENV *top_env;
136
137	/* data associated with this coroutine (initial args) */
138	AV *args;
139	};	161	};
140		162
141	typedef struct coro *Coro__State;	163	typedef struct coro *Coro__State;
142	typedef struct coro *Coro__State_or_hashref;	164	typedef struct coro *Coro__State_or_hashref;
143		165
144	static AV *	166	static AV *
145	coro_clone_padlist (pTHX_ CV *cv)	167	coro_clone_padlist (CV *cv)
146	{	168	{
147	AV *padlist = CvPADLIST (cv);	169	AV *padlist = CvPADLIST (cv);
148	AV *newpadlist, *newpad;	170	AV *newpadlist, *newpad;
149		171
150	newpadlist = newAV ();	172	newpadlist = newAV ();
151	AvREAL_off (newpadlist);	173	AvREAL_off (newpadlist);
		174	#if PERL_VERSION_ATLEAST (5,9,0)
		175	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		176	#else
152	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	177	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		178	#endif
153	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	179	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
154	--AvFILLp (padlist);	180	--AvFILLp (padlist);
155		181
156	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	182	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
157	av_store (newpadlist, 1, (SV *)newpad);	183	av_store (newpadlist, 1, (SV *)newpad);
158		184
159	return newpadlist;	185	return newpadlist;
160	}	186	}
161		187
162	static void	188	static void
163	free_padlist (pTHX_ AV *padlist)	189	free_padlist (AV *padlist)
164	{	190	{
165	/* may be during global destruction */	191	/* may be during global destruction */
166	if (SvREFCNT (padlist))	192	if (SvREFCNT (padlist))
167	{	193	{
168	I32 i = AvFILLp (padlist);	194	I32 i = AvFILLp (padlist);
…		…
189	AV *padlist;	215	AV *padlist;
190	AV *av = (AV *)mg->mg_obj;	216	AV *av = (AV *)mg->mg_obj;
191		217
192	/* casting is fun. */	218	/* casting is fun. */
193	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	219	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
194	free_padlist (aTHX_ padlist);	220	free_padlist (padlist);
195		221
196	SvREFCNT_dec (av);	222	SvREFCNT_dec (av);
197		223
198	return 0;	224	return 0;
199	}	225	}
200		226
201	#define PERL_MAGIC_coro PERL_MAGIC_ext	227	#define PERL_MAGIC_coro PERL_MAGIC_ext
202		228
203	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	229	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
204		230
		231	#define CORO_MAGIC(cv) \
		232	SvMAGIC (cv) \
		233	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		234	? SvMAGIC (cv) \
		235	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		236	: 0
		237
205	/* the next two functions merely cache the padlists */	238	/* the next two functions merely cache the padlists */
206	static void	239	static void
207	get_padlist (pTHX_ CV *cv)	240	get_padlist (CV *cv)
208	{	241	{
209	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	242	MAGIC *mg = CORO_MAGIC (cv);
		243	AV *av;
210		244
211	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	245	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
212	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	246	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
213	else	247	else
214	{	248	{
215	#if 0	249	#if 0
216	/* this should work - but it doesn't :( */	250	/* this is probably cleaner, but also slower? */
217	CV *cp = Perl_cv_clone (aTHX_ cv);	251	CV *cp = Perl_cv_clone (cv);
218	CvPADLIST (cv) = CvPADLIST (cp);	252	CvPADLIST (cv) = CvPADLIST (cp);
219	CvPADLIST (cp) = 0;	253	CvPADLIST (cp) = 0;
220	SvREFCNT_dec (cp);	254	SvREFCNT_dec (cp);
221	#else	255	#else
222	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	256	CvPADLIST (cv) = coro_clone_padlist (cv);
223	#endif	257	#endif
224	}	258	}
225	}	259	}
226		260
227	static void	261	static void
228	put_padlist (pTHX_ CV *cv)	262	put_padlist (CV *cv)
229	{	263	{
230	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	264	MAGIC *mg = CORO_MAGIC (cv);
		265	AV *av;
231		266
232	if (!mg)	267	if (!mg)
233	{	268	{
234	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	269	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
235	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	270	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
236	mg->mg_virtual = &vtbl_coro;	271	mg->mg_virtual = &vtbl_coro;
237	mg->mg_obj = (SV *)newAV ();	272	mg->mg_obj = (SV *)newAV ();
238	}	273	}
239		274
240	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	275	av = (AV *)mg->mg_obj;
		276
		277	if (AvFILLp (av) >= AvMAX (av))
		278	av_extend (av, AvMAX (av) + 1);
		279
		280	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
241	}	281	}
242		282
243	#define SB do {	283	#define SB do {
244	#define SE } while (0)	284	#define SE } while (0)
245		285
246	#define LOAD(state) load_state(aTHX_ (state));	286	#define LOAD(state) load_state ((state))
247	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	287	#define SAVE(state,flags) save_state ((state),(flags))
248		288
249	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	289	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
250		290
251	static void	291	static void
252	load_state(pTHX_ Coro__State c)	292	load_state (Coro__State c)
253	{	293	{
254	PL_dowarn = c->dowarn;	294	#define VAR(name,type) PL_ ## name = c->name;
255	PL_in_eval = c->in_eval;	295	# include "state.h"
256		296	#undef VAR
257	PL_curstackinfo = c->curstackinfo;
258	PL_curstack = c->curstack;
259	PL_mainstack = c->mainstack;
260	PL_stack_sp = c->stack_sp;
261	PL_op = c->op;
262	PL_curpad = c->curpad;
263	PL_comppad = c->comppad;
264	PL_compcv = c->compcv;
265	PL_stack_base = c->stack_base;
266	PL_stack_max = c->stack_max;
267	PL_tmps_stack = c->tmps_stack;
268	PL_tmps_floor = c->tmps_floor;
269	PL_tmps_ix = c->tmps_ix;
270	PL_tmps_max = c->tmps_max;
271	PL_markstack = c->markstack;
272	PL_markstack_ptr = c->markstack_ptr;
273	PL_markstack_max = c->markstack_max;
274	PL_scopestack = c->scopestack;
275	PL_scopestack_ix = c->scopestack_ix;
276	PL_scopestack_max = c->scopestack_max;
277	PL_savestack = c->savestack;
278	PL_savestack_ix = c->savestack_ix;
279	PL_savestack_max = c->savestack_max;
280	#if PERL_VERSION < 9
281	PL_retstack = c->retstack;
282	PL_retstack_ix = c->retstack_ix;
283	PL_retstack_max = c->retstack_max;
284	#endif
285	PL_curpm = c->curpm;
286	PL_curcop = c->curcop;
287	PL_top_env = c->top_env;
288		297
289	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	298	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
290	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	299	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
291	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	300	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
292		301
…		…
295	CV *cv;	304	CV *cv;
296		305
297	/* now do the ugly restore mess */	306	/* now do the ugly restore mess */
298	while ((cv = (CV *)POPs))	307	while ((cv = (CV *)POPs))
299	{	308	{
300	AV *padlist = (AV *)POPs;
301
302	if (padlist)
303	{
304	put_padlist (aTHX_ cv); /* mark this padlist as available */	309	put_padlist (cv); /* mark this padlist as available */
305	CvPADLIST(cv) = padlist;	310	CvDEPTH (cv) = PTR2IV (POPs);
306	}	311	CvPADLIST (cv) = (AV *)POPs;
307
308	++CvDEPTH(cv);
309	}	312	}
310		313
311	PUTBACK;	314	PUTBACK;
312	}	315	}
313	}	316	}
314		317
315	static void	318	static void
316	save_state(pTHX_ Coro__State c, int flags)	319	save_state (Coro__State c, int flags)
317	{	320	{
318	{	321	{
319	dSP;	322	dSP;
320	I32 cxix = cxstack_ix;	323	I32 cxix = cxstack_ix;
321	PERL_CONTEXT *ccstk = cxstack;	324	PERL_CONTEXT *ccstk = cxstack;
…		…
332	{	335	{
333	while (cxix >= 0)	336	while (cxix >= 0)
334	{	337	{
335	PERL_CONTEXT *cx = &ccstk[cxix--];	338	PERL_CONTEXT *cx = &ccstk[cxix--];
336		339
337	if (CxTYPE(cx) == CXt_SUB)	340	if (CxTYPE (cx) == CXt_SUB)
338	{	341	{
339	CV *cv = cx->blk_sub.cv;	342	CV *cv = cx->blk_sub.cv;
		343
340	if (CvDEPTH(cv))	344	if (CvDEPTH (cv))
341	{	345	{
342	EXTEND (SP, CvDEPTH(cv)*2);	346	EXTEND (SP, 3);
343		347
344	while (--CvDEPTH(cv))
345	{
346	/* this tells the restore code to increment CvDEPTH */
347	PUSHs (Nullsv);
348	PUSHs ((SV *)cv);
349	}
350
351	PUSHs ((SV *)CvPADLIST(cv));	348	PUSHs ((SV *)CvPADLIST (cv));
		349	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
352	PUSHs ((SV *)cv);	350	PUSHs ((SV *)cv);
353		351
		352	CvDEPTH (cv) = 0;
354	get_padlist (aTHX_ cv);	353	get_padlist (cv);
355	}	354	}
356	}	355	}
357	#ifdef CXt_FORMAT	356	#ifdef CXt_FORMAT
358	else if (CxTYPE(cx) == CXt_FORMAT)	357	else if (CxTYPE (cx) == CXt_FORMAT)
359	{	358	{
360	/* I never used formats, so how should I know how these are implemented? */	359	/* I never used formats, so how should I know how these are implemented? */
361	/* my bold guess is as a simple, plain sub... */	360	/* my bold guess is as a simple, plain sub... */
362	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	361	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
363	}	362	}
…		…
377		376
378	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	377	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
379	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	378	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
380	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	379	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
381		380
382	c->dowarn = PL_dowarn;	381	#define VAR(name,type)c->name = PL_ ## name;
383	c->in_eval = PL_in_eval;	382	# include "state.h"
384		383	#undef VAR
385	c->curstackinfo = PL_curstackinfo;
386	c->curstack = PL_curstack;
387	c->mainstack = PL_mainstack;
388	c->stack_sp = PL_stack_sp;
389	c->op = PL_op;
390	c->curpad = PL_curpad;
391	c->comppad = PL_comppad;
392	c->compcv = PL_compcv;
393	c->stack_base = PL_stack_base;
394	c->stack_max = PL_stack_max;
395	c->tmps_stack = PL_tmps_stack;
396	c->tmps_floor = PL_tmps_floor;
397	c->tmps_ix = PL_tmps_ix;
398	c->tmps_max = PL_tmps_max;
399	c->markstack = PL_markstack;
400	c->markstack_ptr = PL_markstack_ptr;
401	c->markstack_max = PL_markstack_max;
402	c->scopestack = PL_scopestack;
403	c->scopestack_ix = PL_scopestack_ix;
404	c->scopestack_max = PL_scopestack_max;
405	c->savestack = PL_savestack;
406	c->savestack_ix = PL_savestack_ix;
407	c->savestack_max = PL_savestack_max;
408	#if PERL_VERSION < 9
409	c->retstack = PL_retstack;
410	c->retstack_ix = PL_retstack_ix;
411	c->retstack_max = PL_retstack_max;
412	#endif
413	c->curpm = PL_curpm;
414	c->curcop = PL_curcop;
415	c->top_env = PL_top_env;
416	}	384	}
417		385
418	/*	386	/*
419	* allocate various perl stacks. This is an exact copy	387	* allocate various perl stacks. This is an exact copy
420	* of perl.c:init_stacks, except that it uses less memory	388	* of perl.c:init_stacks, except that it uses less memory
421	* on the (sometimes correct) assumption that coroutines do	389	* on the (sometimes correct) assumption that coroutines do
422	* not usually need a lot of stackspace.	390	* not usually need a lot of stackspace.
423	*/	391	*/
424	static void	392	static void
425	coro_init_stacks (pTHX)	393	coro_init_stacks ()
426	{	394	{
427	LOCK;
428
429	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	395	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
430	PL_curstackinfo->si_type = PERLSI_MAIN;	396	PL_curstackinfo->si_type = PERLSI_MAIN;
431	PL_curstack = PL_curstackinfo->si_stack;	397	PL_curstack = PL_curstackinfo->si_stack;
432	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	398	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
433		399
434	PL_stack_base = AvARRAY(PL_curstack);	400	PL_stack_base = AvARRAY(PL_curstack);
435	PL_stack_sp = PL_stack_base;	401	PL_stack_sp = PL_stack_base;
436	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	402	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
437		403
438	New(50,PL_tmps_stack,96,SV*);	404	New(50,PL_tmps_stack,128,SV*);
439	PL_tmps_floor = -1;	405	PL_tmps_floor = -1;
440	PL_tmps_ix = -1;	406	PL_tmps_ix = -1;
441	PL_tmps_max = 96;	407	PL_tmps_max = 128;
442		408
443	New(54,PL_markstack,16,I32);	409	New(54,PL_markstack,32,I32);
444	PL_markstack_ptr = PL_markstack;	410	PL_markstack_ptr = PL_markstack;
445	PL_markstack_max = PL_markstack + 16;	411	PL_markstack_max = PL_markstack + 32;
446		412
447	#ifdef SET_MARK_OFFSET	413	#ifdef SET_MARK_OFFSET
448	SET_MARK_OFFSET;	414	SET_MARK_OFFSET;
449	#endif	415	#endif
450		416
451	New(54,PL_scopestack,16,I32);	417	New(54,PL_scopestack,32,I32);
452	PL_scopestack_ix = 0;	418	PL_scopestack_ix = 0;
453	PL_scopestack_max = 16;	419	PL_scopestack_max = 32;
454		420
455	New(54,PL_savestack,96,ANY);	421	New(54,PL_savestack,64,ANY);
456	PL_savestack_ix = 0;	422	PL_savestack_ix = 0;
457	PL_savestack_max = 96;	423	PL_savestack_max = 64;
458		424
459	#if PERL_VERSION < 9	425	#if !PERL_VERSION_ATLEAST (5,9,0)
460	New(54,PL_retstack,8,OP*);	426	New(54,PL_retstack,16,OP*);
461	PL_retstack_ix = 0;	427	PL_retstack_ix = 0;
462	PL_retstack_max = 8;	428	PL_retstack_max = 16;
463	#endif	429	#endif
464
465	UNLOCK;
466	}	430	}
467		431
468	/*	432	/*
469	* destroy the stacks, the callchain etc...	433	* destroy the stacks, the callchain etc...
470	*/	434	*/
471	static void	435	static void
472	destroy_stacks(pTHX)	436	coro_destroy_stacks ()
473	{	437	{
474	if (!IN_DESTRUCT)	438	if (!IN_DESTRUCT)
475	{	439	{
476	/* is this ugly, I ask? */	440	/* is this ugly, I ask? */
477	LEAVE_SCOPE (0);	441	LEAVE_SCOPE (0);
…		…
508		472
509	Safefree (PL_tmps_stack);	473	Safefree (PL_tmps_stack);
510	Safefree (PL_markstack);	474	Safefree (PL_markstack);
511	Safefree (PL_scopestack);	475	Safefree (PL_scopestack);
512	Safefree (PL_savestack);	476	Safefree (PL_savestack);
513	#if PERL_VERSION < 9	477	#if !PERL_VERSION_ATLEAST (5,9,0)
514	Safefree (PL_retstack);	478	Safefree (PL_retstack);
515	#endif	479	#endif
516	}	480	}
517		481
518	static void	482	static void
519	allocate_stack (Coro__State ctx, int alloc)	483	setup_coro (struct coro *coro)
520	{
521	coro_stack *stack;
522
523	New (0, stack, 1, coro_stack);
524
525	stack->refcnt = 1;
526	stack->usecnt = 1;
527	stack->gencnt = ctx->gencnt = 0;
528
529	if (alloc)
530	{
531	#if HAVE_MMAP
532	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
533	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
534	if (stack->sptr == (void *)-1)
535	#endif
536	{
537	stack->ssize = - (STACKSIZE * (long)sizeof (long));
538	New (0, stack->sptr, STACKSIZE, long);
539	}
540	}
541	else
542	stack->sptr = 0;
543
544	ctx->stack = stack;
545	}
546
547	static void
548	deallocate_stack (Coro__State ctx)
549	{
550	coro_stack *stack = ctx->stack;
551
552	ctx->stack = 0;
553
554	if (stack)
555	{
556	if (!--stack->refcnt)
557	{
558	#ifdef HAVE_MMAP
559	if (stack->ssize > 0 && stack->sptr)
560	munmap (stack->sptr, stack->ssize);
561	else
562	#endif
563	Safefree (stack->sptr);
564
565	Safefree (stack);
566	}
567	else if (ctx->gencnt == stack->gencnt)
568	--stack->usecnt;
569	}
570	}
571
572	static void
573	setup_coro (void *arg)
574	{	484	{
575	/*	485	/*
576	* emulate part of the perl startup here.	486	* emulate part of the perl startup here.
577	*/	487	*/
578	dTHX;
579	dSP;
580	Coro__State ctx = (Coro__State)arg;
581	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
582		488
583	coro_init_stacks (aTHX);	489	coro_init_stacks ();
584	/*PL_curcop = 0;*/	490
585	/*PL_in_eval = PL_in_eval;*/ /* inherit */	491	PL_curcop = &PL_compiling;
		492	PL_in_eval = EVAL_NULL;
		493	PL_curpm = 0;
		494	PL_localizing = 0;
		495	PL_dirty = 0;
		496	PL_restartop = 0;
		497
		498	{
		499	dSP;
		500	LOGOP myop;
		501
		502	/* I have no idea why this is needed, but it is */
		503	PUSHMARK (SP);
		504
586	SvREFCNT_dec (GvAV (PL_defgv));	505	SvREFCNT_dec (GvAV (PL_defgv));
587	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	506	GvAV (PL_defgv) = coro->args; coro->args = 0;
588		507
589	SPAGAIN;
590
591	if (ctx->stack)
592	{
593	ctx->cursp = 0;
594
595	PUSHMARK(SP);
596	PUTBACK;
597	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
598
599	if (SvTRUE (ERRSV))
600	croak (NULL);
601	else
602	croak ("FATAL: CCTXT coroutine returned!");
603	}
604	else
605	{
606	UNOP myop;
607
608	PL_op = (OP *)&myop;
609
610	Zero(&myop, 1, UNOP);	508	Zero (&myop, 1, LOGOP);
611	myop.op_next = Nullop;	509	myop.op_next = Nullop;
612	myop.op_flags = OPf_WANT_VOID;	510	myop.op_flags = OPf_WANT_VOID;
613		511
		512	PL_op = (OP *)&myop;
		513
614	PUSHMARK(SP);	514	PUSHMARK (SP);
615	XPUSHs (sub_init);	515	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
616	/*
617	* the next line is slightly wrong, as PL_op->op_next
618	* is actually being executed so we skip the first op.
619	* that doesn't matter, though, since it is only
620	* pp_nextstate and we never return...
621	* ah yes, and I don't care anyways ;)
622	*/
623	PUTBACK;	516	PUTBACK;
624	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	517	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
625	SPAGAIN;	518	SPAGAIN;
		519	}
626		520
627	ENTER; /* necessary e.g. for dounwind */	521	ENTER; /* necessary e.g. for dounwind */
628	}
629	}	522	}
630		523
631	static void	524	static void
632	continue_coro (void *arg)	525	free_coro_mortal ()
633	{	526	{
634	/*
635	* this is a _very_ stripped down perl interpreter ;)
636	*/
637	dTHX;
638	Coro__State ctx = (Coro__State)arg;
639
640	PL_top_env = &ctx->start_env;
641
642	ctx->cursp = 0;
643	PL_op = PL_op->op_next;
644	CALLRUNOPS(aTHX);
645
646	abort ();
647	}
648
649	static void
650	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
651	{
652	dSTACKLEVEL;
653
654	if (prev != next)
655	{
656	if (next->mainstack)
657	{
658	LOCK;
659	SAVE (prev, flags);
660	LOAD (next);
661	UNLOCK;
662
663	/* mark this state as in-use */
664	next->mainstack = 0;
665	next->tmps_ix = -2;
666
667	/* stacklevel changed? if yes, grab the stack for us! */
668	if (flags & TRANSFER_SAVE_CCTXT)
669	{
670	if (!prev->stack)
671	allocate_stack (prev, 0);
672	else if (prev->cursp != stacklevel
673	&& prev->stack->usecnt > 1)
674	{
675	prev->gencnt = ++prev->stack->gencnt;
676	prev->stack->usecnt = 1;
677	}
678
679	/* has our stack been invalidated? */
680	if (next->stack && next->stack->gencnt != next->gencnt)
681	{
682	deallocate_stack (next);
683	allocate_stack (next, 1);
684	coro_create (&(next->stack->cctx),
685	continue_coro, (void *)next,
686	next->stack->sptr, labs (next->stack->ssize));
687	}
688
689	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
690	prev->cursp = stacklevel;
691	/* don't add any code here */
692	}
693	else
694	next->cursp = stacklevel;
695	}
696	else if (next->tmps_ix == -2)
697	croak ("tried to transfer to running coroutine");
698	else
699	{
700	LOCK;
701	SAVE (prev, -1); /* first get rid of the old state */
702	UNLOCK;
703
704	if (flags & TRANSFER_SAVE_CCTXT)
705	{
706	if (!prev->stack)
707	allocate_stack (prev, 0);
708
709	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
710	{
711	PL_top_env = &next->start_env;
712
713	setup_coro (next);
714	next->cursp = stacklevel;
715
716	prev->stack->refcnt++;
717	prev->stack->usecnt++;
718	next->stack = prev->stack;
719	next->gencnt = prev->gencnt;
720	}
721	else
722	{
723	assert (!next->stack);
724	allocate_stack (next, 1);
725	coro_create (&(next->stack->cctx),
726	setup_coro, (void *)next,
727	next->stack->sptr, labs (next->stack->ssize));
728	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
729	prev->cursp = stacklevel;
730	/* don't add any code here */
731	}
732	}
733	else
734	{
735	setup_coro (next);
736	next->cursp = stacklevel;
737	}
738	}
739	}
740
741	LOCK;
742	if (coro_mortal)	527	if (coro_mortal)
743	{	528	{
744	SvREFCNT_dec (coro_mortal);	529	SvREFCNT_dec (coro_mortal);
745	coro_mortal = 0;	530	coro_mortal = 0;
746	}	531	}
		532	}
		533
		534	static void NOINLINE
		535	prepare_cctx (coro_cctx *cctx)
		536	{
		537	dSP;
		538	LOGOP myop;
		539
		540	Zero (&myop, 1, LOGOP);
		541	myop.op_next = PL_op;
		542	myop.op_flags = OPf_WANT_VOID;
		543
		544	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		545
		546	PUSHMARK (SP);
		547	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		548	PUTBACK;
		549	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		550	SPAGAIN;
		551	}
		552
		553	static void
		554	coro_run (void *arg)
		555	{
		556	/* coro_run is the alternative epilogue of transfer() */
747	UNLOCK;	557	UNLOCK;
748	}
749		558
750	#define SV_CORO(sv,func) \	559	/*
751	do { \	560	* this is a _very_ stripped down perl interpreter ;)
752	if (SvROK (sv)) \	561	*/
753	sv = SvRV (sv); \	562	PL_top_env = &PL_start_env;
754	\
755	if (SvTYPE (sv) == SVt_PVHV) \
756	{ \
757	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
758	\
759	if (!he) \
760	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
761	\
762	(sv) = SvRV (HeVAL(he)); \
763	} \
764	\
765	/* must also be changed inside Coro::Cont::yield */ \
766	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
767	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
768	\
769	} while(0)
770		563
771	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	564	/* inject call to cctx_init */
		565	prepare_cctx ((coro_cctx *)arg);
772		566
		567	/* somebody will hit me for both perl_run and PL_restartop */
		568	perl_run (PL_curinterp);
		569
		570	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		571	abort ();
		572	}
		573
		574	static coro_cctx *
		575	cctx_new ()
		576	{
		577	coro_cctx *cctx;
		578
		579	++cctx_count;
		580
		581	New (0, cctx, 1, coro_cctx);
		582
		583	#if HAVE_MMAP
		584
		585	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		586	/* mmap suppsedly does allocate-on-write for us */
		587	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		588
		589	if (cctx->sptr == (void *)-1)
		590	{
		591	perror ("FATAL: unable to mmap stack for coroutine");
		592	_exit (EXIT_FAILURE);
		593	}
		594
		595	# if STACKGUARD
		596	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		597	# endif
		598
		599	#else
		600
		601	cctx->ssize = STACKSIZE * (long)sizeof (long);
		602	New (0, cctx->sptr, STACKSIZE, long);
		603
		604	if (!cctx->sptr)
		605	{
		606	perror ("FATAL: unable to malloc stack for coroutine");
		607	_exit (EXIT_FAILURE);
		608	}
		609
		610	#endif
		611
		612	#if USE_VALGRIND
		613	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		614	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		615	cctx->ssize + (char *)cctx->sptr
		616	);
		617	#endif
		618
		619	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		620
		621	return cctx;
		622	}
		623
		624	static void
		625	cctx_destroy (coro_cctx *cctx)
		626	{
		627	if (!cctx)
		628	return;
		629
		630	--cctx_count;
		631
		632	#if USE_VALGRIND
		633	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		634	#endif
		635
		636	#if HAVE_MMAP
		637	munmap (cctx->sptr, cctx->ssize);
		638	#else
		639	Safefree (cctx->sptr);
		640	#endif
		641
		642	Safefree (cctx);
		643	}
		644
		645	static coro_cctx *
		646	cctx_get ()
		647	{
		648	coro_cctx *cctx;
		649
		650	if (cctx_first)
		651	{
		652	cctx = cctx_first;
		653	cctx_first = cctx->next;
		654	--cctx_idle;
		655	}
		656	else
		657	{
		658	cctx = cctx_new ();
		659	PL_op = PL_op->op_next;
		660	}
		661
		662	return cctx;
		663	}
		664
		665	static void
		666	cctx_put (coro_cctx *cctx)
		667	{
		668	/* free another cctx if overlimit */
		669	if (cctx_idle >= MAX_IDLE_CCTX)
		670	{
		671	coro_cctx *first = cctx_first;
		672	cctx_first = first->next;
		673	--cctx_idle;
		674
		675	assert (!first->inuse);
		676	cctx_destroy (first);
		677	}
		678
		679	++cctx_idle;
		680	cctx->next = cctx_first;
		681	cctx_first = cctx;
		682	}
		683
		684	/* never call directly, always through the coro_state_transfer global variable */
		685	static void NOINLINE
		686	transfer (struct coro *prev, struct coro *next, int flags)
		687	{
		688	dSTACKLEVEL;
		689
		690	/* sometimes transfer is only called to set idle_sp */
		691	if (flags == TRANSFER_SET_STACKLEVEL)
		692	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		693	else if (prev != next)
		694	{
		695	coro_cctx *prev__cctx;
		696
		697	if (prev->flags & CF_NEW)
		698	{
		699	/* create a new empty context */
		700	Newz (0, prev->cctx, 1, coro_cctx);
		701	prev->cctx->inuse = 1;
		702	prev->flags &= ~CF_NEW;
		703	prev->flags |= CF_RUNNING;
		704	}
		705
		706	/*TODO: must not croak here */
		707	if (!prev->flags & CF_RUNNING)
		708	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		709
		710	if (next->flags & CF_RUNNING)
		711	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		712
		713	prev->flags &= ~CF_RUNNING;
		714	next->flags |= CF_RUNNING;
		715
		716	LOCK;
		717
		718	if (next->flags & CF_NEW)
		719	{
		720	/* need to start coroutine */
		721	next->flags &= ~CF_NEW;
		722	/* first get rid of the old state */
		723	SAVE (prev, -1);
		724	/* setup coroutine call */
		725	setup_coro (next);
		726	/* need a new stack */
		727	assert (!next->stack);
		728	}
		729	else
		730	{
		731	/* coroutine already started */
		732	SAVE (prev, flags);
		733	LOAD (next);
		734	}
		735
		736	prev__cctx = prev->cctx;
		737
		738	/* possibly "free" the cctx */
		739	if (prev__cctx->idle_sp == STACKLEVEL)
		740	{
		741	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		742	assert (PL_top_env == prev__cctx->top_env);
		743
		744	prev->cctx = 0;
		745
		746	cctx_put (prev__cctx);
		747	prev__cctx->inuse = 0;
		748	}
		749
		750	if (!next->cctx)
		751	{
		752	next->cctx = cctx_get ();
		753	assert (!next->cctx->inuse);
		754	next->cctx->inuse = 1;
		755	}
		756
		757	if (prev__cctx != next->cctx)
		758	{
		759	prev__cctx->top_env = PL_top_env;
		760	PL_top_env = next->cctx->top_env;
		761	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		762	}
		763
		764	free_coro_mortal ();
		765
		766	UNLOCK;
		767	}
		768	}
		769
		770	struct transfer_args
		771	{
		772	struct coro *prev, *next;
		773	int flags;
		774	};
		775
		776	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		777
		778	static void
		779	coro_state_destroy (struct coro *coro)
		780	{
		781	if (coro->refcnt--)
		782	return;
		783
		784	if (coro->mainstack && coro->mainstack != main_mainstack)
		785	{
		786	struct coro temp;
		787
		788	if (coro->flags & CF_RUNNING)
		789	croak ("FATAL: tried to destroy currently running coroutine");
		790
		791	SAVE ((&temp), TRANSFER_SAVE_ALL);
		792	LOAD (coro);
		793
		794	coro_destroy_stacks ();
		795
		796	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		797
		798	coro->mainstack = 0;
		799	}
		800
		801	cctx_destroy (coro->cctx);
		802	SvREFCNT_dec (coro->args);
		803	Safefree (coro);
		804	}
		805
773	static void	806	static int
		807	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		808	{
		809	struct coro *coro = (struct coro *)mg->mg_ptr;
		810	mg->mg_ptr = 0;
		811
		812	coro_state_destroy (coro);
		813
		814	return 0;
		815	}
		816
		817	static int
		818	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		819	{
		820	struct coro *coro = (struct coro *)mg->mg_ptr;
		821
		822	++coro->refcnt;
		823
		824	return 0;
		825	}
		826
		827	static MGVTBL coro_state_vtbl = {
		828	0, 0, 0, 0,
		829	coro_state_clear,
		830	0,
		831	#ifdef MGf_DUP
		832	coro_state_dup,
		833	#else
		834	# define MGf_DUP 0
		835	#endif
		836	};
		837
		838	static struct coro *
		839	SvSTATE (SV *coro)
		840	{
		841	HV *stash;
		842	MAGIC *mg;
		843
		844	if (SvROK (coro))
		845	coro = SvRV (coro);
		846
		847	stash = SvSTASH (coro);
		848	if (stash != coro_stash && stash != coro_state_stash)
		849	{
		850	/* very slow, but rare, check */
		851	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		852	croak ("Coro::State object required");
		853	}
		854
		855	mg = SvMAGIC (coro);
		856	assert (mg->mg_type == PERL_MAGIC_ext);
		857	return (struct coro *)mg->mg_ptr;
		858	}
		859
		860	static void
		861	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		862	{
		863	ta->prev = SvSTATE (prev);
		864	ta->next = SvSTATE (next);
		865	ta->flags = flags;
		866	}
		867
		868	static void
774	api_transfer(pTHX_ SV *prev, SV *next, int flags)	869	api_transfer (SV *prev, SV *next, int flags)
775	{	870	{
776	SV_CORO (prev, "Coro::transfer");	871	struct transfer_args ta;
777	SV_CORO (next, "Coro::transfer");
778		872
779	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	873	prepare_transfer (&ta, prev, next, flags);
		874	TRANSFER (ta);
780	}	875	}
781		876
782	/** Coro ********************************************************************/	877	/** Coro ********************************************************************/
783		878
784	#define PRIO_MAX 3	879	#define PRIO_MAX 3
…		…
787	#define PRIO_LOW -1	882	#define PRIO_LOW -1
788	#define PRIO_IDLE -3	883	#define PRIO_IDLE -3
789	#define PRIO_MIN -4	884	#define PRIO_MIN -4
790		885
791	/* for Coro.pm */	886	/* for Coro.pm */
792	static GV *coro_current, *coro_idle;	887	static SV *coro_current;
793	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	888	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
794	static int coro_nready;	889	static int coro_nready;
795		890
796	static void	891	static void
797	coro_enq (pTHX_ SV *sv)	892	coro_enq (SV *coro_sv)
798	{	893	{
799	SV **xprio;
800	int prio;
801
802	if (SvTYPE (sv) != SVt_PVHV)
803	croak ("Coro::ready tried to enqueue something that is not a coroutine");
804
805	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
806	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
807
808	prio = prio > PRIO_MAX ? PRIO_MAX
809	: prio < PRIO_MIN ? PRIO_MIN
810	: prio;
811
812	av_push (coro_ready [prio - PRIO_MIN], sv);	894	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
813	coro_nready++;	895	coro_nready++;
814	}	896	}
815		897
816	static SV *	898	static SV *
817	coro_deq (pTHX_ int min_prio)	899	coro_deq (int min_prio)
818	{	900	{
819	int prio = PRIO_MAX - PRIO_MIN;	901	int prio = PRIO_MAX - PRIO_MIN;
820		902
821	min_prio -= PRIO_MIN;	903	min_prio -= PRIO_MIN;
822	if (min_prio < 0)	904	if (min_prio < 0)
823	min_prio = 0;	905	min_prio = 0;
824		906
825	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	907	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
826	if (av_len (coro_ready[prio]) >= 0)	908	if (AvFILLp (coro_ready [prio]) >= 0)
827	{	909	{
828	coro_nready--;	910	coro_nready--;
829	return av_shift (coro_ready[prio]);	911	return av_shift (coro_ready [prio]);
830	}	912	}
831		913
832	return 0;	914	return 0;
833	}	915	}
834		916
835	static void	917	static int
836	api_ready (SV *coro)	918	api_ready (SV *coro_sv)
837	{	919	{
838	dTHX;	920	struct coro *coro;
839		921
840	if (SvROK (coro))	922	if (SvROK (coro_sv))
841	coro = SvRV (coro);	923	coro_sv = SvRV (coro_sv);
		924
		925	coro = SvSTATE (coro_sv);
		926
		927	if (coro->flags & CF_READY)
		928	return 0;
		929
		930	#if 0 /* this is actually harmless */
		931	if (coro->flags & CF_RUNNING)
		932	croak ("Coro::ready called on currently running coroutine");
		933	#endif
		934
		935	coro->flags |= CF_READY;
842		936
843	LOCK;	937	LOCK;
844	coro_enq (aTHX_ SvREFCNT_inc (coro));	938	coro_enq (SvREFCNT_inc (coro_sv));
845	UNLOCK;	939	UNLOCK;
		940
		941	return 1;
		942	}
		943
		944	static int
		945	api_is_ready (SV *coro_sv)
		946	{
		947	return !!SvSTATE (coro_sv)->flags & CF_READY;
		948	}
		949
		950	static void
		951	prepare_schedule (struct transfer_args *ta)
		952	{
		953	SV *prev, *next;
		954
		955	for (;;)
		956	{
		957	LOCK;
		958	next = coro_deq (PRIO_MIN);
		959	UNLOCK;
		960
		961	if (next)
		962	break;
		963
		964	{
		965	dSP;
		966
		967	ENTER;
		968	SAVETMPS;
		969
		970	PUSHMARK (SP);
		971	PUTBACK;
		972	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		973
		974	FREETMPS;
		975	LEAVE;
		976	}
		977	}
		978
		979	prev = SvRV (coro_current);
		980	SvRV_set (coro_current, next);
		981
		982	/* free this only after the transfer */
		983	LOCK;
		984	free_coro_mortal ();
		985	UNLOCK;
		986	coro_mortal = prev;
		987
		988	assert (!SvROK(prev));//D
		989	assert (!SvROK(next));//D
		990
		991	ta->prev = SvSTATE (prev);
		992	ta->next = SvSTATE (next);
		993	ta->flags = TRANSFER_SAVE_ALL;
		994
		995	assert (ta->flags & CF_READY);
		996	ta->next->flags &= ~CF_READY;
		997	}
		998
		999	static void
		1000	prepare_cede (struct transfer_args *ta)
		1001	{
		1002	api_ready (coro_current);
		1003
		1004	prepare_schedule (ta);
846	}	1005	}
847		1006
848	static void	1007	static void
849	api_schedule (void)	1008	api_schedule (void)
850	{	1009	{
851	dTHX;	1010	struct transfer_args ta;
852		1011
853	SV *prev, *next;	1012	prepare_schedule (&ta);
854		1013	TRANSFER (ta);
855	LOCK;
856
857	prev = SvRV (GvSV (coro_current));
858	next = coro_deq (aTHX_ PRIO_MIN);
859
860	if (!next)
861	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
862
863	/* free this only after the transfer */
864	coro_mortal = prev;
865	SV_CORO (prev, "Coro::schedule");
866
867	SvRV (GvSV (coro_current)) = next;
868
869	SV_CORO (next, "Coro::schedule");
870
871	UNLOCK;
872
873	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
874	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
875	}	1014	}
876		1015
877	static void	1016	static void
878	api_cede (void)	1017	api_cede (void)
879	{	1018	{
880	dTHX;	1019	struct transfer_args ta;
881		1020
882	LOCK;	1021	prepare_cede (&ta);
883	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1022	TRANSFER (ta);
884	UNLOCK;
885
886	api_schedule ();
887	}	1023	}
888		1024
889	MODULE = Coro::State PACKAGE = Coro::State	1025	MODULE = Coro::State PACKAGE = Coro::State
890		1026
891	PROTOTYPES: ENABLE	1027	PROTOTYPES: DISABLE
892		1028
893	BOOT:	1029	BOOT:
894	{ /* {} necessary for stoopid perl-5.6.x */	1030	{
895	#ifdef USE_ITHREADS	1031	#ifdef USE_ITHREADS
896	MUTEX_INIT (&coro_mutex);	1032	MUTEX_INIT (&coro_mutex);
897	#endif	1033	#endif
		1034	BOOT_PAGESIZE;
898		1035
899	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
900	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
901	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1036	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
902		1037
903	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1038	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
904	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1039	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
905	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1040	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
906	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
907		1041
908	main_mainstack = PL_mainstack;	1042	main_mainstack = PL_mainstack;
909		1043
910	coroapi.ver = CORO_API_VERSION;	1044	coroapi.ver = CORO_API_VERSION;
911	coroapi.transfer = api_transfer;	1045	coroapi.transfer = api_transfer;
912	}
913		1046
914	Coro::State	1047	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
915	_newprocess(args)	1048	}
916	SV * args	1049
917	PROTOTYPE: $	1050	SV *
		1051	new (char *klass, ...)
918	CODE:	1052	CODE:
919	Coro__State coro;	1053	{
		1054	struct coro *coro;
		1055	HV *hv;
		1056	int i;
920		1057
921	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
922	croak ("Coro::State::_newprocess expects an arrayref");
923
924	Newz (0, coro, 1, struct coro);	1058	Newz (0, coro, 1, struct coro);
		1059	coro->args = newAV ();
		1060	coro->flags = CF_NEW;
925		1061
926	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1062	hv = newHV ();
927	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1063	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
928	/*coro->stack = 0;*/	1064	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
929		1065
930	/* same as JMPENV_BOOTSTRAP */	1066	for (i = 1; i < items; i++)
931	/* we might be able to recycle start_env, but safe is safe */	1067	av_push (coro->args, newSVsv (ST (i)));
932	/*Zero(&coro->start_env, 1, JMPENV);*/	1068	}
933	coro->start_env.je_ret = -1;
934	coro->start_env.je_mustcatch = TRUE;
935
936	RETVAL = coro;
937	OUTPUT:	1069	OUTPUT:
938	RETVAL	1070	RETVAL
939		1071
940	void	1072	void
941	transfer(prev, next, flags)	1073	_set_stacklevel (...)
942	SV *prev	1074	ALIAS:
943	SV *next	1075	Coro::State::transfer = 1
944	int flags	1076	Coro::schedule = 2
945	PROTOTYPE: @	1077	Coro::cede = 3
946	CODE:	1078	CODE:
947	PUTBACK;	1079	{
948	SV_CORO (next, "Coro::transfer");	1080	struct transfer_args ta;
949	SV_CORO (prev, "Coro::transfer");	1081
950	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1082	switch (ix)
951	SPAGAIN;	1083	{
		1084	case 0:
		1085	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1086	ta.next = 0;
		1087	ta.flags = TRANSFER_SET_STACKLEVEL;
		1088	break;
		1089
		1090	case 1:
		1091	if (items != 3)
		1092	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);
		1093
		1094	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1095	break;
		1096
		1097	case 2:
		1098	prepare_schedule (&ta);
		1099	break;
		1100
		1101	case 3:
		1102	prepare_cede (&ta);
		1103	break;
		1104	}
		1105
		1106	TRANSFER (ta);
		1107	}
952		1108
953	void	1109	void
954	DESTROY(coro)	1110	_clone_state_from (SV *dst, SV *src)
955	Coro::State coro	1111	CODE:
956	CODE:	1112	{
		1113	struct coro *coro_src = SvSTATE (src);
957		1114
958	if (coro->mainstack && coro->mainstack != main_mainstack)	1115	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
959	{
960	struct coro temp;
961		1116
962	PUTBACK;	1117	++coro_src->refcnt;
963	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1118	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
964	LOAD (aTHX_ coro);	1119	}
965	SPAGAIN;
966
967	destroy_stacks (aTHX);
968
969	LOAD ((&temp)); /* this will get rid of defsv etc.. */
970	SPAGAIN;
971
972	coro->mainstack = 0;
973	}
974
975	deallocate_stack (coro);
976	SvREFCNT_dec (coro->args);
977	Safefree (coro);
978		1120
979	void	1121	void
980	_exit(code)	1122	_exit (code)
981	int code	1123	int code
982	PROTOTYPE: $	1124	PROTOTYPE: $
983	CODE:	1125	CODE:
984	_exit (code);	1126	_exit (code);
985		1127
986	MODULE = Coro::State PACKAGE = Coro::Cont	1128	int
		1129	cctx_count ()
		1130	CODE:
		1131	RETVAL = cctx_count;
		1132	OUTPUT:
		1133	RETVAL
987		1134
988	# this is slightly dirty (should expose a c-level api)	1135	int
989		1136	cctx_idle ()
990	void	1137	CODE:
991	yield(...)	1138	RETVAL = cctx_idle;
992	PROTOTYPE: @	1139	OUTPUT:
993	CODE:	1140	RETVAL
994	SV *yieldstack;
995	SV *sv;
996	AV *defav = GvAV (PL_defgv);
997	struct coro *prev, *next;
998
999	yieldstack = *hv_fetch (
1000	(HV *)SvRV (GvSV (coro_current)),
1001	"yieldstack", sizeof ("yieldstack") - 1,
1002	0
1003	);
1004
1005	/* set up @_ -- ugly */
1006	av_clear (defav);
1007	av_fill (defav, items - 1);
1008	while (items--)
1009	av_store (defav, items, SvREFCNT_inc (ST(items)));
1010
1011	sv = av_pop ((AV *)SvRV (yieldstack));
1012	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1013	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1014	SvREFCNT_dec (sv);
1015
1016	transfer (aTHX_ prev, next, 0);
1017		1141
1018	MODULE = Coro::State PACKAGE = Coro	1142	MODULE = Coro::State PACKAGE = Coro
1019		1143
1020	# this is slightly dirty (should expose a c-level api)
1021
1022	BOOT:	1144	BOOT:
1023	{	1145	{
1024	int i;	1146	int i;
		1147
1025	HV *stash = gv_stashpv ("Coro", TRUE);	1148	coro_stash = gv_stashpv ("Coro", TRUE);
1026		1149
1027	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1150	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1028	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1151	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1029	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1152	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1030	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1153	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1031	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1154	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1032	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1155	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1033		1156
1034	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1157	coro_current = get_sv ("Coro::current", FALSE);
1035	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1158	SvREADONLY_on (coro_current);
1036		1159
1037	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1160	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1038	coro_ready[i] = newAV ();	1161	coro_ready[i] = newAV ();
1039		1162
1040	{	1163	{
1041	SV *sv = perl_get_sv("Coro::API", 1);	1164	SV *sv = perl_get_sv("Coro::API", 1);
1042		1165
1043	coroapi.schedule = api_schedule;	1166	coroapi.schedule = api_schedule;
1044	coroapi.cede = api_cede;	1167	coroapi.cede = api_cede;
1045	coroapi.ready = api_ready;	1168	coroapi.ready = api_ready;
		1169	coroapi.is_ready = api_is_ready;
1046	coroapi.nready = &coro_nready;	1170	coroapi.nready = &coro_nready;
1047	coroapi.current = coro_current;	1171	coroapi.current = coro_current;
1048		1172
1049	GCoroAPI = &coroapi;	1173	GCoroAPI = &coroapi;
1050	sv_setiv(sv, (IV)&coroapi);	1174	sv_setiv (sv, (IV)&coroapi);
1051	SvREADONLY_on(sv);	1175	SvREADONLY_on (sv);
1052	}	1176	}
1053	}	1177	}
1054		1178
1055	#if !PERL_MICRO	1179	int
		1180	prio (Coro::State coro, int newprio = 0)
		1181	ALIAS:
		1182	nice = 1
		1183	CODE:
		1184	{
		1185	RETVAL = coro->prio;
1056		1186
1057	void	1187	if (items > 1)
		1188	{
		1189	if (ix)
		1190	newprio += coro->prio;
		1191
		1192	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1193	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1194
		1195	coro->prio = newprio;
		1196	}
		1197	}
		1198
		1199	SV *
1058	ready(self)	1200	ready (SV *self)
1059	SV * self
1060	PROTOTYPE: $	1201	PROTOTYPE: $
1061	CODE:	1202	CODE:
1062	api_ready (self);	1203	RETVAL = boolSV (api_ready (self));
		1204	OUTPUT:
		1205	RETVAL
1063		1206
1064	#endif	1207	SV *
		1208	is_ready (SV *self)
		1209	PROTOTYPE: $
		1210	CODE:
		1211	RETVAL = boolSV (api_is_ready (self));
		1212	OUTPUT:
		1213	RETVAL
1065		1214
1066	int	1215	int
1067	nready(...)	1216	nready (...)
1068	PROTOTYPE:	1217	PROTOTYPE:
1069	CODE:	1218	CODE:
1070	RETVAL = coro_nready;	1219	RETVAL = coro_nready;
1071	OUTPUT:	1220	OUTPUT:
1072	RETVAL	1221	RETVAL
1073		1222
1074	void	1223	void
1075	schedule(...)	1224	_set_current (SV *current)
1076	PROTOTYPE:	1225	PROTOTYPE: $
1077	CODE:	1226	CODE:
1078	api_schedule ();	1227	SvREFCNT_dec (SvRV (coro_current));
		1228	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1079		1229
1080	void	1230	MODULE = Coro::State PACKAGE = Coro::AIO
1081	cede(...)
1082	PROTOTYPE:
1083	CODE:
1084	api_cede ();
1085		1231
1086	# and these are hacks
1087	SV *	1232	SV *
1088	_aio_get_state ()	1233	_get_state ()
1089	CODE:	1234	CODE:
1090	{	1235	{
1091	struct {	1236	struct {
1092	int errorno;	1237	int errorno;
1093	int laststype;	1238	int laststype;
…		…
1104	}	1249	}
1105	OUTPUT:	1250	OUTPUT:
1106	RETVAL	1251	RETVAL
1107		1252
1108	void	1253	void
1109	_aio_set_state (char *data_)	1254	_set_state (char *data_)
1110	PROTOTYPE: $	1255	PROTOTYPE: $
1111	CODE:	1256	CODE:
1112	{	1257	{
1113	struct {	1258	struct {
1114	int errorno;	1259	int errorno;

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