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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.58 by pcg, Fri May 14 13:25:09 2004 UTC vs.
Revision 1.103 by root, Mon Nov 27 01:33:30 2006 UTC

1	#define PERL_NO_GET_CONTEXT	1	#include "libcoro/coro.c"
2		2
3	#include "EXTERN.h"	3	#include "EXTERN.h"
4	#include "perl.h"	4	#include "perl.h"
5	#include "XSUB.h"	5	#include "XSUB.h"
6		6
7	#include "patchlevel.h"	7	#include "patchlevel.h"
8		8
9	#if PATCHLEVEL < 6	9	#define PERL_VERSION_ATLEAST(a,b,c) \
		10	(PERL_REVISION > (a) \
		11	|| (PERL_REVISION == (a) \
		12	&& (PERL_VERSION > (b) \
		13	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		14
		15	#if !PERL_VERSION_ATLEAST (5,6,0)
10	# ifndef PL_ppaddr	16	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	17	# define PL_ppaddr ppaddr
12	# endif	18	# endif
13	# ifndef call_sv	19	# ifndef call_sv
14	# define call_sv perl_call_sv	20	# define call_sv perl_call_sv
…		…
25	# ifndef IS_PADCONST	31	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	32	# define IS_PADCONST(v) 0
27	# endif	33	# endif
28	#endif	34	#endif
29		35
30	#include "libcoro/coro.c"
31
32	#include <signal.h>	36	#include <stdio.h>
		37	#include <errno.h>
		38
		39	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		40	# undef STACKGUARD
		41	#endif
		42
		43	#ifndef STACKGUARD
		44	# define STACKGUARD 0
		45	#endif
33		46
34	#ifdef HAVE_MMAP	47	#ifdef HAVE_MMAP
35	# include <unistd.h>	48	# include <unistd.h>
36	# include <sys/mman.h>	49	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS	50	# ifndef MAP_ANONYMOUS
…		…
39	# define MAP_ANONYMOUS MAP_ANON	52	# define MAP_ANONYMOUS MAP_ANON
40	# else	53	# else
41	# undef HAVE_MMAP	54	# undef HAVE_MMAP
42	# endif	55	# endif
43	# endif	56	# endif
		57	# include <limits.h>
		58	# ifndef PAGESIZE
		59	# define PAGESIZE pagesize
		60	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		61	static long pagesize;
		62	# else
		63	# define BOOT_PAGESIZE
44	#endif	64	# endif
45		65	#endif
46	#define SUB_INIT "Coro::State::initialize"
47	#define UCORO_STATE "_coro_state"
48		66
49	/* The next macro should declare a variable stacklevel that contains and approximation	67	/* 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	68	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	69	* and should be unique. */
		70	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	71	#define STACKLEVEL ((void *)&stacklevel)
53		72
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	73	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		74
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	75	#if __GNUC__ >= 3
		76	# define attribute(x) __attribute__(x)
		77	#else
		78	# define attribute(x)
		79	#endif
		80
		81	#define NOINLINE attribute ((noinline))
57		82
58	#include "CoroAPI.h"	83	#include "CoroAPI.h"
		84
		85	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59		86
60	#ifdef USE_ITHREADS	87	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	88	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	89	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	90	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	91	#else
65	# define LOCK 0	92	# define LOCK (void)0
66	# define UNLOCK 0	93	# define UNLOCK (void)0
67	#endif	94	#endif
68		95
69	static struct CoroAPI coroapi;	96	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	97	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	98	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 */	99	static SV *coro_mortal; /* will be freed after next transfer */
75		100
76	/* this is actually not only the c stack but also c registers etc... */	101	/* this is a structure representing a c-level coroutine */
77	typedef struct {	102	typedef struct coro_stack {
78	int refcnt; /* pointer reference counter */	103	struct coro_stack *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		104
82	coro_context cctx;	105	/* the stack */
83
84	void *sptr;	106	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	107	long ssize; /* positive == mmap, otherwise malloc */
		108
		109	/* cpu state */
		110	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		111	JMPENV *top_env;
		112	coro_context cctx;
86	} coro_stack;	113	} coro_stack;
87		114
		115	/* this is a structure representing a perl-level coroutine */
88	struct coro {	116	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	117	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;
91
92	/* the optional C context */
93	coro_stack *stack;	118	coro_stack *stack;
94	void *cursp;	119
		120	/* data associated with this coroutine (initial args) */
		121	AV *args;
95	int gencnt;	122	int refcnt;
96		123
97	/* optionally saved, might be zero */	124	/* optionally saved, might be zero */
98	AV *defav;	125	AV *defav;
99	SV *defsv;	126	SV *defsv;
100	SV *errsv;	127	SV *errsv;
…		…
109	AV *mainstack;	136	AV *mainstack;
110	SV **stack_sp;	137	SV **stack_sp;
111	OP *op;	138	OP *op;
112	SV **curpad;	139	SV **curpad;
113	AV *comppad;	140	AV *comppad;
		141	CV *compcv;
114	SV **stack_base;	142	SV **stack_base;
115	SV **stack_max;	143	SV **stack_max;
116	SV **tmps_stack;	144	SV **tmps_stack;
117	I32 tmps_floor;	145	I32 tmps_floor;
118	I32 tmps_ix;	146	I32 tmps_ix;
…		…
127	I32 savestack_ix;	155	I32 savestack_ix;
128	I32 savestack_max;	156	I32 savestack_max;
129	OP **retstack;	157	OP **retstack;
130	I32 retstack_ix;	158	I32 retstack_ix;
131	I32 retstack_max;	159	I32 retstack_max;
		160	PMOP *curpm;
132	COP *curcop;	161	COP *curcop;
133	JMPENV *top_env;
134		162
135	/* data associated with this coroutine (initial args) */	163	/* coro process data */
136	AV *args;	164	int prio;
137	};	165	};
138		166
139	typedef struct coro *Coro__State;	167	typedef struct coro *Coro__State;
140	typedef struct coro *Coro__State_or_hashref;	168	typedef struct coro *Coro__State_or_hashref;
141		169
142	/* mostly copied from op.c:cv_clone2 */	170	static AV *
143	STATIC AV *	171	coro_clone_padlist (CV *cv)
144	clone_padlist (pTHX_ AV *protopadlist)
145	{	172	{
146	AV *av;	173	AV *padlist = CvPADLIST (cv);
147	I32 ix;
148	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
149	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
150	SV **pname = AvARRAY (protopad_name);
151	SV **ppad = AvARRAY (protopad);
152	I32 fname = AvFILLp (protopad_name);
153	I32 fpad = AvFILLp (protopad);
154	AV *newpadlist, *newpad_name, *newpad;	174	AV *newpadlist, *newpad;
155	SV **npad;
156
157	newpad_name = newAV ();
158	for (ix = fname; ix >= 0; ix--)
159	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
160
161	newpad = newAV ();
162	av_fill (newpad, AvFILLp (protopad));
163	npad = AvARRAY (newpad);
164		175
165	newpadlist = newAV ();	176	newpadlist = newAV ();
166	AvREAL_off (newpadlist);	177	AvREAL_off (newpadlist);
167	av_store (newpadlist, 0, (SV *) newpad_name);	178	#if PERL_VERSION_ATLEAST (5,9,0)
		179	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		180	#else
		181	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		182	#endif
		183	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		184	--AvFILLp (padlist);
		185
		186	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
168	av_store (newpadlist, 1, (SV *) newpad);	187	av_store (newpadlist, 1, (SV *)newpad);
169
170	av = newAV (); /* will be @_ */
171	av_extend (av, 0);
172	av_store (newpad, 0, (SV *) av);
173	AvFLAGS (av) = AVf_REIFY;
174
175	for (ix = fpad; ix > 0; ix--)
176	{
177	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
178
179	if (namesv && namesv != &PL_sv_undef)
180	{
181	char *name = SvPVX (namesv); /* XXX */
182
183	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
184	{ /* lexical from outside? */
185	npad[ix] = SvREFCNT_inc (ppad[ix]);
186	}
187	else
188	{ /* our own lexical */
189	SV *sv;
190	if (*name == '&')
191	sv = SvREFCNT_inc (ppad[ix]);
192	else if (*name == '@')
193	sv = (SV *) newAV ();
194	else if (*name == '%')
195	sv = (SV *) newHV ();
196	else
197	sv = NEWSV (0, 0);
198
199	#ifdef SvPADBUSY
200	if (!SvPADBUSY (sv))
201	#endif
202	SvPADMY_on (sv);
203
204	npad[ix] = sv;
205	}
206	}
207	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
208	{
209	npad[ix] = SvREFCNT_inc (ppad[ix]);
210	}
211	else
212	{
213	SV *sv = NEWSV (0, 0);
214	SvPADTMP_on (sv);
215	npad[ix] = sv;
216	}
217	}
218
219	#if 0 /* return -ENOTUNDERSTOOD */
220	/* Now that vars are all in place, clone nested closures. */
221
222	for (ix = fpad; ix > 0; ix--) {
223	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
224	if (namesv
225	&& namesv != &PL_sv_undef
226	&& !(SvFLAGS(namesv) & SVf_FAKE)
227	&& *SvPVX(namesv) == '&'
228	&& CvCLONE(ppad[ix]))
229	{
230	CV *kid = cv_clone((CV*)ppad[ix]);
231	SvREFCNT_dec(ppad[ix]);
232	CvCLONE_on(kid);
233	SvPADMY_on(kid);
234	npad[ix] = (SV*)kid;
235	}
236	}
237	#endif
238		188
239	return newpadlist;	189	return newpadlist;
240	}	190	}
241		191
242	STATIC void	192	static void
243	free_padlist (pTHX_ AV *padlist)	193	free_padlist (AV *padlist)
244	{	194	{
245	/* may be during global destruction */	195	/* may be during global destruction */
246	if (SvREFCNT (padlist))	196	if (SvREFCNT (padlist))
247	{	197	{
248	I32 i = AvFILLp (padlist);	198	I32 i = AvFILLp (padlist);
…		…
261		211
262	SvREFCNT_dec ((SV*)padlist);	212	SvREFCNT_dec ((SV*)padlist);
263	}	213	}
264	}	214	}
265		215
266	STATIC int	216	static int
267	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	217	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
268	{	218	{
269	AV *padlist;	219	AV *padlist;
270	AV *av = (AV *)mg->mg_obj;	220	AV *av = (AV *)mg->mg_obj;
271		221
272	/* casting is fun. */	222	/* casting is fun. */
273	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	223	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
274	free_padlist (aTHX_ padlist);	224	free_padlist (padlist);
		225
		226	SvREFCNT_dec (av);
		227
		228	return 0;
275	}	229	}
276		230
277	#define PERL_MAGIC_coro PERL_MAGIC_ext	231	#define PERL_MAGIC_coro PERL_MAGIC_ext
278		232
279	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	233	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
280		234
281	/* the next two functions merely cache the padlists */	235	/* the next two functions merely cache the padlists */
282	STATIC void	236	static void
283	get_padlist (pTHX_ CV *cv)	237	get_padlist (CV *cv)
284	{	238	{
285	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	239	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
286		240
287	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
288	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	242	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
289	else	243	else
		244	{
		245	#if 0
		246	/* this is probably cleaner, but also slower? */
		247	CV *cp = Perl_cv_clone (cv);
		248	CvPADLIST (cv) = CvPADLIST (cp);
		249	CvPADLIST (cp) = 0;
		250	SvREFCNT_dec (cp);
		251	#else
290	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	252	CvPADLIST (cv) = coro_clone_padlist (cv);
		253	#endif
		254	}
291	}	255	}
292		256
293	STATIC void	257	static void
294	put_padlist (pTHX_ CV *cv)	258	put_padlist (CV *cv)
295	{	259	{
296	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	260	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
297		261
298	if (!mg)	262	if (!mg)
299	{	263	{
…		…
307	}	271	}
308		272
309	#define SB do {	273	#define SB do {
310	#define SE } while (0)	274	#define SE } while (0)
311		275
312	#define LOAD(state) load_state(aTHX_ (state));	276	#define LOAD(state) load_state((state));
313	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	277	#define SAVE(state,flags) save_state((state),(flags));
314		278
315	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	279	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
316		280
317	static void	281	static void
318	load_state(pTHX_ Coro__State c)	282	load_state(Coro__State c)
319	{	283	{
320	PL_dowarn = c->dowarn;	284	PL_dowarn = c->dowarn;
321	PL_in_eval = c->in_eval;	285	PL_in_eval = c->in_eval;
322		286
323	PL_curstackinfo = c->curstackinfo;	287	PL_curstackinfo = c->curstackinfo;
…		…
325	PL_mainstack = c->mainstack;	289	PL_mainstack = c->mainstack;
326	PL_stack_sp = c->stack_sp;	290	PL_stack_sp = c->stack_sp;
327	PL_op = c->op;	291	PL_op = c->op;
328	PL_curpad = c->curpad;	292	PL_curpad = c->curpad;
329	PL_comppad = c->comppad;	293	PL_comppad = c->comppad;
		294	PL_compcv = c->compcv;
330	PL_stack_base = c->stack_base;	295	PL_stack_base = c->stack_base;
331	PL_stack_max = c->stack_max;	296	PL_stack_max = c->stack_max;
332	PL_tmps_stack = c->tmps_stack;	297	PL_tmps_stack = c->tmps_stack;
333	PL_tmps_floor = c->tmps_floor;	298	PL_tmps_floor = c->tmps_floor;
334	PL_tmps_ix = c->tmps_ix;	299	PL_tmps_ix = c->tmps_ix;
…		…
340	PL_scopestack_ix = c->scopestack_ix;	305	PL_scopestack_ix = c->scopestack_ix;
341	PL_scopestack_max = c->scopestack_max;	306	PL_scopestack_max = c->scopestack_max;
342	PL_savestack = c->savestack;	307	PL_savestack = c->savestack;
343	PL_savestack_ix = c->savestack_ix;	308	PL_savestack_ix = c->savestack_ix;
344	PL_savestack_max = c->savestack_max;	309	PL_savestack_max = c->savestack_max;
		310	#if !PERL_VERSION_ATLEAST (5,9,0)
345	PL_retstack = c->retstack;	311	PL_retstack = c->retstack;
346	PL_retstack_ix = c->retstack_ix;	312	PL_retstack_ix = c->retstack_ix;
347	PL_retstack_max = c->retstack_max;	313	PL_retstack_max = c->retstack_max;
		314	#endif
		315	PL_curpm = c->curpm;
348	PL_curcop = c->curcop;	316	PL_curcop = c->curcop;
349	PL_top_env = c->top_env;
350		317
351	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
352	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
353	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	320	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
354		321
…		…
361	{	328	{
362	AV *padlist = (AV *)POPs;	329	AV *padlist = (AV *)POPs;
363		330
364	if (padlist)	331	if (padlist)
365	{	332	{
366	put_padlist (aTHX_ cv); /* mark this padlist as available */	333	put_padlist (cv); /* mark this padlist as available */
367	CvPADLIST(cv) = padlist;	334	CvPADLIST(cv) = padlist;
368	}	335	}
369		336
370	++CvDEPTH(cv);	337	++CvDEPTH(cv);
371	}	338	}
…		…
373	PUTBACK;	340	PUTBACK;
374	}	341	}
375	}	342	}
376		343
377	static void	344	static void
378	save_state(pTHX_ Coro__State c, int flags)	345	save_state(Coro__State c, int flags)
379	{	346	{
380	{	347	{
381	dSP;	348	dSP;
382	I32 cxix = cxstack_ix;	349	I32 cxix = cxstack_ix;
383	PERL_CONTEXT *ccstk = cxstack;	350	PERL_CONTEXT *ccstk = cxstack;
…		…
411	}	378	}
412		379
413	PUSHs ((SV *)CvPADLIST(cv));	380	PUSHs ((SV *)CvPADLIST(cv));
414	PUSHs ((SV *)cv);	381	PUSHs ((SV *)cv);
415		382
416	get_padlist (aTHX_ cv); /* this is a monster */	383	get_padlist (cv);
417	}	384	}
418	}	385	}
419	#ifdef CXt_FORMAT	386	#ifdef CXt_FORMAT
420	else if (CxTYPE(cx) == CXt_FORMAT)	387	else if (CxTYPE(cx) == CXt_FORMAT)
421	{	388	{
…		…
449	c->mainstack = PL_mainstack;	416	c->mainstack = PL_mainstack;
450	c->stack_sp = PL_stack_sp;	417	c->stack_sp = PL_stack_sp;
451	c->op = PL_op;	418	c->op = PL_op;
452	c->curpad = PL_curpad;	419	c->curpad = PL_curpad;
453	c->comppad = PL_comppad;	420	c->comppad = PL_comppad;
		421	c->compcv = PL_compcv;
454	c->stack_base = PL_stack_base;	422	c->stack_base = PL_stack_base;
455	c->stack_max = PL_stack_max;	423	c->stack_max = PL_stack_max;
456	c->tmps_stack = PL_tmps_stack;	424	c->tmps_stack = PL_tmps_stack;
457	c->tmps_floor = PL_tmps_floor;	425	c->tmps_floor = PL_tmps_floor;
458	c->tmps_ix = PL_tmps_ix;	426	c->tmps_ix = PL_tmps_ix;
…		…
464	c->scopestack_ix = PL_scopestack_ix;	432	c->scopestack_ix = PL_scopestack_ix;
465	c->scopestack_max = PL_scopestack_max;	433	c->scopestack_max = PL_scopestack_max;
466	c->savestack = PL_savestack;	434	c->savestack = PL_savestack;
467	c->savestack_ix = PL_savestack_ix;	435	c->savestack_ix = PL_savestack_ix;
468	c->savestack_max = PL_savestack_max;	436	c->savestack_max = PL_savestack_max;
		437	#if !PERL_VERSION_ATLEAST (5,9,0)
469	c->retstack = PL_retstack;	438	c->retstack = PL_retstack;
470	c->retstack_ix = PL_retstack_ix;	439	c->retstack_ix = PL_retstack_ix;
471	c->retstack_max = PL_retstack_max;	440	c->retstack_max = PL_retstack_max;
		441	#endif
		442	c->curpm = PL_curpm;
472	c->curcop = PL_curcop;	443	c->curcop = PL_curcop;
473	c->top_env = PL_top_env;
474	}	444	}
475		445
476	/*	446	/*
477	* allocate various perl stacks. This is an exact copy	447	* allocate various perl stacks. This is an exact copy
478	* of perl.c:init_stacks, except that it uses less memory	448	* of perl.c:init_stacks, except that it uses less memory
479	* on the (sometimes correct) assumption that coroutines do	449	* on the (sometimes correct) assumption that coroutines do
480	* not usually need a lot of stackspace.	450	* not usually need a lot of stackspace.
481	*/	451	*/
482	STATIC void	452	static void
483	coro_init_stacks (pTHX)	453	coro_init_stacks ()
484	{	454	{
485	LOCK;
486
487	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
488	PL_curstackinfo->si_type = PERLSI_MAIN;	456	PL_curstackinfo->si_type = PERLSI_MAIN;
489	PL_curstack = PL_curstackinfo->si_stack;	457	PL_curstack = PL_curstackinfo->si_stack;
490	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
491		459
…		…
512		480
513	New(54,PL_savestack,96,ANY);	481	New(54,PL_savestack,96,ANY);
514	PL_savestack_ix = 0;	482	PL_savestack_ix = 0;
515	PL_savestack_max = 96;	483	PL_savestack_max = 96;
516		484
		485	#if !PERL_VERSION_ATLEAST (5,9,0)
517	New(54,PL_retstack,8,OP*);	486	New(54,PL_retstack,8,OP*);
518	PL_retstack_ix = 0;	487	PL_retstack_ix = 0;
519	PL_retstack_max = 8;	488	PL_retstack_max = 8;
520		489	#endif
521	UNLOCK;
522	}	490	}
523		491
524	/*	492	/*
525	* destroy the stacks, the callchain etc...	493	* destroy the stacks, the callchain etc...
526	*/	494	*/
527	STATIC void	495	static void
528	destroy_stacks(pTHX)	496	coro_destroy_stacks()
529	{	497	{
530	if (!IN_DESTRUCT)	498	if (!IN_DESTRUCT)
531	{	499	{
532	/* is this ugly, I ask? */	500	/* is this ugly, I ask? */
533	LEAVE_SCOPE (0);	501	LEAVE_SCOPE (0);
…		…
564		532
565	Safefree (PL_tmps_stack);	533	Safefree (PL_tmps_stack);
566	Safefree (PL_markstack);	534	Safefree (PL_markstack);
567	Safefree (PL_scopestack);	535	Safefree (PL_scopestack);
568	Safefree (PL_savestack);	536	Safefree (PL_savestack);
		537	#if !PERL_VERSION_ATLEAST (5,9,0)
569	Safefree (PL_retstack);	538	Safefree (PL_retstack);
570	}
571
572	static void
573	allocate_stack (Coro__State ctx, int alloc)
574	{
575	coro_stack *stack;
576
577	New (0, stack, 1, coro_stack);
578
579	stack->refcnt = 1;
580	stack->usecnt = 1;
581	stack->gencnt = ctx->gencnt = 0;
582
583	if (alloc)
584	{
585	#if HAVE_MMAP
586	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
587	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
588	if (stack->sptr == (void *)-1)
589	#endif	539	#endif
590	{
591	/*FIXME*//*D*//* reasonable stack size! */
592	stack->ssize = - (8192 * sizeof (long));
593	New (0, stack->sptr, 8192, long);
594	}
595	}
596	else
597	stack->sptr = 0;
598
599	ctx->stack = stack;
600	}	540	}
601		541
602	static void	542	static void
603	deallocate_stack (Coro__State ctx)	543	setup_coro (struct coro *coro)
604	{
605	coro_stack *stack = ctx->stack;
606
607	ctx->stack = 0;
608
609	if (stack)
610	{
611	if (!--stack->refcnt)
612	{
613	#ifdef HAVE_MMAP
614	if (stack->ssize > 0 && stack->sptr)
615	munmap (stack->sptr, stack->ssize);
616	else
617	#endif
618	Safefree (stack->sptr);
619
620	Safefree (stack);
621	}
622	else if (ctx->gencnt == stack->gencnt)
623	--stack->usecnt;
624	}
625	}
626
627	static void
628	setup_coro (void *arg)
629	{	544	{
630	/*	545	/*
631	* emulate part of the perl startup here.	546	* emulate part of the perl startup here.
632	*/	547	*/
633	dTHX;
634	dSP;
635	Coro__State ctx = (Coro__State)arg;
636	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
637		548
638	coro_init_stacks (aTHX);	549	coro_init_stacks ();
		550
639	/*PL_curcop = 0;*/	551	PL_curcop = 0;
640	/*PL_in_eval = PL_in_eval;*/ /* inherit */	552	PL_in_eval = 0;
		553	PL_curpm = 0;
		554
		555	{
		556	dSP;
		557	LOGOP myop;
		558
		559	/* I have no idea why this is needed, but it is */
		560	PUSHMARK (SP);
		561
641	SvREFCNT_dec (GvAV (PL_defgv));	562	SvREFCNT_dec (GvAV (PL_defgv));
642	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	563	GvAV (PL_defgv) = coro->args; coro->args = 0;
643		564
644	SPAGAIN;
645
646	if (ctx->stack)
647	{
648	ctx->cursp = 0;
649
650	PUSHMARK(SP);
651	PUTBACK;
652	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
653
654	if (SvTRUE (ERRSV))
655	croak (NULL);
656	else
657	croak ("FATAL: CCTXT coroutine returned!");
658	}
659	else
660	{
661	UNOP myop;
662
663	PL_op = (OP *)&myop;
664
665	Zero(&myop, 1, UNOP);	565	Zero (&myop, 1, LOGOP);
666	myop.op_next = Nullop;	566	myop.op_next = Nullop;
667	myop.op_flags = OPf_WANT_VOID;	567	myop.op_flags = OPf_WANT_VOID;
668		568
		569	PL_op = (OP *)&myop;
		570
669	PUSHMARK(SP);	571	PUSHMARK (SP);
670	XPUSHs (sub_init);	572	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
671	/*
672	* the next line is slightly wrong, as PL_op->op_next
673	* is actually being executed so we skip the first op.
674	* that doesn't matter, though, since it is only
675	* pp_nextstate and we never return...
676	* ah yes, and I don't care anyways ;)
677	*/
678	PUTBACK;	573	PUTBACK;
679	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
680	SPAGAIN;	575	SPAGAIN;
681		576
682	ENTER; /* necessary e.g. for dounwind */	577	ENTER; /* necessary e.g. for dounwind */
683	}	578	}
684	}	579	}
685		580
686	static void	581	static void
687	continue_coro (void *arg)	582	free_coro_mortal ()
688	{	583	{
689	/*
690	* this is a _very_ stripped down perl interpreter ;)
691	*/
692	dTHX;
693	Coro__State ctx = (Coro__State)arg;
694	JMPENV coro_start_env;
695
696	PL_top_env = &ctx->start_env;
697
698	ctx->cursp = 0;
699	PL_op = PL_op->op_next;
700	CALLRUNOPS(aTHX);
701
702	abort ();
703	}
704
705	STATIC void
706	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
707	{
708	dSTACKLEVEL;
709
710	if (prev != next)
711	{
712	if (next->mainstack)
713	{
714	LOCK;
715	SAVE (prev, flags);
716	LOAD (next);
717	UNLOCK;
718
719	/* mark this state as in-use */
720	next->mainstack = 0;
721	next->tmps_ix = -2;
722
723	/* stacklevel changed? if yes, grab the stack for us! */
724	if (flags & TRANSFER_SAVE_CCTXT)
725	{
726	if (!prev->stack)
727	allocate_stack (prev, 0);
728	else if (prev->cursp != stacklevel
729	&& prev->stack->usecnt > 1)
730	{
731	prev->gencnt = ++prev->stack->gencnt;
732	prev->stack->usecnt = 1;
733	}
734
735	/* has our stack been invalidated? */
736	if (next->stack && next->stack->gencnt != next->gencnt)
737	{
738	deallocate_stack (next);
739	allocate_stack (next, 1);
740	coro_create (&(next->stack->cctx),
741	continue_coro, (void *)next,
742	next->stack->sptr, labs (next->stack->ssize));
743	}
744
745	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
746	prev->cursp = stacklevel;
747	/* don't add any code here */
748	}
749	else
750	next->cursp = stacklevel;
751	}
752	else if (next->tmps_ix == -2)
753	croak ("tried to transfer to running coroutine");
754	else
755	{
756	LOCK;
757	SAVE (prev, -1); /* first get rid of the old state */
758	UNLOCK;
759
760	if (flags & TRANSFER_SAVE_CCTXT)
761	{
762	if (!prev->stack)
763	allocate_stack (prev, 0);
764
765	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
766	{
767	PL_top_env = &next->start_env;
768
769	setup_coro (next);
770	next->cursp = stacklevel;
771
772	prev->stack->refcnt++;
773	prev->stack->usecnt++;
774	next->stack = prev->stack;
775	next->gencnt = prev->gencnt;
776	}
777	else
778	{
779	assert (!next->stack);
780	allocate_stack (next, 1);
781	coro_create (&(next->stack->cctx),
782	setup_coro, (void *)next,
783	next->stack->sptr, labs (next->stack->ssize));
784	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
785	prev->cursp = stacklevel;
786	/* don't add any code here */
787	}
788	}
789	else
790	{
791	setup_coro (next);
792	next->cursp = stacklevel;
793	}
794	}
795	}
796
797	LOCK;
798	if (coro_mortal)	584	if (coro_mortal)
799	{	585	{
800	SvREFCNT_dec (coro_mortal);	586	SvREFCNT_dec (coro_mortal);
801	coro_mortal = 0;	587	coro_mortal = 0;
802	}	588	}
		589	}
		590
		591	static void NOINLINE
		592	prepare_cctx (coro_stack *cctx)
		593	{
		594	dSP;
		595	LOGOP myop;
		596
		597	Zero (&myop, 1, LOGOP);
		598	myop.op_next = PL_op;
		599	myop.op_flags = OPf_WANT_VOID;
		600
		601	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
		602
		603	PUSHMARK (SP);
		604	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
		605	PUTBACK;
		606	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		607	SPAGAIN;
		608	}
		609
		610	static void
		611	coro_run (void *arg)
		612	{
		613	/* coro_run is the alternative epilogue of transfer() */
803	UNLOCK;	614	UNLOCK;
804	}
805		615
806	#define SV_CORO(sv,func) \	616	/*
807	do { \	617	* this is a _very_ stripped down perl interpreter ;)
808	if (SvROK (sv)) \	618	*/
809	sv = SvRV (sv); \	619	PL_top_env = &PL_start_env;
810	\	620	/* inject call to cctx_init */
811	if (SvTYPE (sv) == SVt_PVHV) \	621	prepare_cctx ((coro_stack *)arg);
812	{ \
813	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
814	\
815	if (!he) \
816	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
817	\
818	(sv) = SvRV (HeVAL(he)); \
819	} \
820	\
821	/* must also be changed inside Coro::Cont::yield */ \
822	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
823	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
824	\
825	} while(0)
826		622
827	#define SvSTATE(sv) (struct coro *)SvIV (sv)	623	/* somebody will hit me for both perl_run and PL_restartop */
		624	perl_run (PL_curinterp);
828		625
		626	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
		627	abort ();
		628	}
		629
		630	static coro_stack *
		631	stack_new ()
		632	{
		633	coro_stack *stack;
		634
		635	New (0, stack, 1, coro_stack);
		636
		637	#if HAVE_MMAP
		638
		639	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		640	/* mmap suppsedly does allocate-on-write for us */
		641	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		642
		643	if (stack->sptr == (void *)-1)
		644	{
		645	perror ("FATAL: unable to mmap stack for coroutine");
		646	_exit (EXIT_FAILURE);
		647	}
		648
		649	# if STACKGUARD
		650	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		651	# endif
		652
		653	#else
		654
		655	stack->ssize = STACKSIZE * (long)sizeof (long);
		656	New (0, stack->sptr, STACKSIZE, long);
		657
		658	if (!stack->sptr)
		659	{
		660	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		661	_exit (EXIT_FAILURE);
		662	}
		663
		664	#endif
		665
		666	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		667
		668	return stack;
		669	}
		670
		671	static void
		672	stack_free (coro_stack *stack)
		673	{
		674	if (!stack)
		675	return;
		676
		677	#if HAVE_MMAP
		678	munmap (stack->sptr, stack->ssize);
		679	#else
		680	Safefree (stack->sptr);
		681	#endif
		682
		683	Safefree (stack);
		684	}
		685
		686	static coro_stack *stack_first;
		687	static int cctx_count, cctx_idle;
		688
		689	static coro_stack *
		690	stack_get ()
		691	{
		692	coro_stack *stack;
		693
		694	if (stack_first)
		695	{
		696	--cctx_idle;
		697	stack = stack_first;
		698	stack_first = stack->next;
		699	}
		700	else
		701	{
		702	++cctx_count;
		703	stack = stack_new ();
		704	PL_op = PL_op->op_next;
		705	}
		706
		707	return stack;
		708	}
		709
		710	static void
		711	stack_put (coro_stack *stack)
		712	{
		713	++cctx_idle;
		714	stack->next = stack_first;
		715	stack_first = stack;
		716	}
		717
		718	/* never call directly, always through the coro_state_transfer global variable */
		719	static void NOINLINE
		720	transfer (struct coro *prev, struct coro *next, int flags)
		721	{
		722	dSTACKLEVEL;
		723
		724	/* sometimes transfer is only called to set idle_sp */
		725	if (flags == TRANSFER_SET_STACKLEVEL)
		726	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		727	else if (prev != next)
		728	{
		729	coro_stack *prev__stack;
		730
		731	LOCK;
		732
		733	if (next->mainstack)
		734	{
		735	/* coroutine already started */
		736	SAVE (prev, flags);
		737	LOAD (next);
		738	}
		739	else
		740	{
		741	/* need to start coroutine */
		742	/* first get rid of the old state */
		743	SAVE (prev, -1);
		744	/* setup coroutine call */
		745	setup_coro (next);
		746	/* need a stack */
		747	next->stack = 0;
		748	}
		749
		750	if (!prev->stack)
		751	/* create a new empty context */
		752	Newz (0, prev->stack, 1, coro_stack);
		753
		754	prev__stack = prev->stack;
		755
		756	/* possibly "free" the stack */
		757	if (prev__stack->idle_sp == STACKLEVEL)
		758	{
		759	stack_put (prev__stack);
		760	prev->stack = 0;
		761	}
		762
		763	if (!next->stack)
		764	next->stack = stack_get ();
		765
		766	if (prev__stack != next->stack)
		767	{
		768	prev__stack->top_env = PL_top_env;
		769	PL_top_env = next->stack->top_env;
		770	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		771	}
		772
		773	free_coro_mortal ();
		774
		775	UNLOCK;
		776	}
		777	}
		778
		779	struct transfer_args
		780	{
		781	struct coro *prev, *next;
		782	int flags;
		783	};
		784
		785	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		786
		787	static void
		788	coro_state_destroy (struct coro *coro)
		789	{
		790	if (coro->refcnt--)
		791	return;
		792
		793	if (coro->mainstack && coro->mainstack != main_mainstack)
		794	{
		795	struct coro temp;
		796
		797	SAVE ((&temp), TRANSFER_SAVE_ALL);
		798	LOAD (coro);
		799
		800	coro_destroy_stacks ();
		801
		802	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		803
		804	coro->mainstack = 0;
		805	}
		806
		807	stack_free (coro->stack);
		808	SvREFCNT_dec (coro->args);
		809	Safefree (coro);
		810	}
		811
829	static void	812	static int
		813	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		814	{
		815	struct coro *coro = (struct coro *)mg->mg_ptr;
		816	mg->mg_ptr = 0;
		817
		818	coro_state_destroy (coro);
		819
		820	return 0;
		821	}
		822
		823	static int
		824	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		825	{
		826	struct coro *coro = (struct coro *)mg->mg_ptr;
		827
		828	++coro->refcnt;
		829
		830	return 0;
		831	}
		832
		833	static MGVTBL coro_state_vtbl = {
		834	0, 0, 0, 0,
		835	coro_state_clear,
		836	0,
		837	#ifdef MGf_DUP
		838	coro_state_dup,
		839	#else
		840	# define MGf_DUP 0
		841	#endif
		842	};
		843
		844	static struct coro *
		845	SvSTATE (SV *coro)
		846	{
		847	HV *stash;
		848	MAGIC *mg;
		849
		850	if (SvROK (coro))
		851	coro = SvRV (coro);
		852
		853	stash = SvSTASH (coro);
		854	if (stash != coro_stash && stash != coro_state_stash)
		855	{
		856	/* very slow, but rare, check */
		857	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		858	croak ("Coro::State object required");
		859	}
		860
		861	mg = SvMAGIC (coro);
		862	assert (mg->mg_type == PERL_MAGIC_ext);
		863	return (struct coro *)mg->mg_ptr;
		864	}
		865
		866	static void
		867	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		868	{
		869	ta->prev = SvSTATE (prev);
		870	ta->next = SvSTATE (next);
		871	ta->flags = flags;
		872	}
		873
		874	static void
830	api_transfer(pTHX_ SV *prev, SV *next, int flags)	875	api_transfer (SV *prev, SV *next, int flags)
831	{	876	{
832	SV_CORO (prev, "Coro::transfer");	877	dTHX;
833	SV_CORO (next, "Coro::transfer");	878	struct transfer_args ta;
834		879
835	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	880	prepare_transfer (&ta, prev, next, flags);
		881	TRANSFER (ta);
836	}	882	}
837		883
838	/** Coro ********************************************************************/	884	/** Coro ********************************************************************/
839		885
840	#define PRIO_MAX 3	886	#define PRIO_MAX 3
…		…
844	#define PRIO_IDLE -3	890	#define PRIO_IDLE -3
845	#define PRIO_MIN -4	891	#define PRIO_MIN -4
846		892
847	/* for Coro.pm */	893	/* for Coro.pm */
848	static GV *coro_current, *coro_idle;	894	static GV *coro_current, *coro_idle;
849	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	895	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
850	static int coro_nready;	896	static int coro_nready;
851		897
852	static void	898	static void
853	coro_enq (pTHX_ SV *sv)	899	coro_enq (SV *sv)
854	{	900	{
		901	int prio;
		902
855	if (SvTYPE (sv) == SVt_PVHV)	903	if (SvTYPE (sv) != SVt_PVHV)
856	{
857	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
858	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
859
860	prio = prio > PRIO_MAX ? PRIO_MAX
861	: prio < PRIO_MIN ? PRIO_MIN
862	: prio;
863
864	av_push (coro_ready [prio - PRIO_MIN], sv);
865	coro_nready++;
866
867	return;
868	}
869
870	croak ("Coro::ready tried to enqueue something that is not a coroutine");	904	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		905
		906	prio = SvSTATE (sv)->prio;
		907
		908	av_push (coro_ready [prio - PRIO_MIN], sv);
		909	coro_nready++;
871	}	910	}
872		911
873	static SV *	912	static SV *
874	coro_deq (pTHX_ int min_prio)	913	coro_deq (int min_prio)
875	{	914	{
876	int prio = PRIO_MAX - PRIO_MIN;	915	int prio = PRIO_MAX - PRIO_MIN;
877		916
878	min_prio -= PRIO_MIN;	917	min_prio -= PRIO_MIN;
879	if (min_prio < 0)	918	if (min_prio < 0)
880	min_prio = 0;	919	min_prio = 0;
881		920
882	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	921	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
883	if (av_len (coro_ready[prio]) >= 0)	922	if (AvFILLp (coro_ready [prio]) >= 0)
884	{	923	{
885	coro_nready--;	924	coro_nready--;
886	return av_shift (coro_ready[prio]);	925	return av_shift (coro_ready [prio]);
887	}	926	}
888		927
889	return 0;	928	return 0;
890	}	929	}
891		930
…		…
896		935
897	if (SvROK (coro))	936	if (SvROK (coro))
898	coro = SvRV (coro);	937	coro = SvRV (coro);
899		938
900	LOCK;	939	LOCK;
901	coro_enq (aTHX_ SvREFCNT_inc (coro));	940	coro_enq (SvREFCNT_inc (coro));
902	UNLOCK;	941	UNLOCK;
903	}	942	}
904		943
905	static void	944	static void
		945	prepare_schedule (struct transfer_args *ta)
		946	{
		947	SV *current, *prev, *next;
		948
		949	current = GvSV (coro_current);
		950
		951	for (;;)
		952	{
		953	LOCK;
		954	next = coro_deq (PRIO_MIN);
		955	UNLOCK;
		956
		957	if (next)
		958	break;
		959
		960	{
		961	dSP;
		962
		963	ENTER;
		964	SAVETMPS;
		965
		966	PUSHMARK (SP);
		967	PUTBACK;
		968	call_sv (GvSV (coro_idle), G_DISCARD);
		969
		970	FREETMPS;
		971	LEAVE;
		972	}
		973	}
		974
		975	prev = SvRV (current);
		976	SvRV (current) = next;
		977
		978	/* free this only after the transfer */
		979	LOCK;
		980	free_coro_mortal ();
		981	UNLOCK;
		982	coro_mortal = prev;
		983
		984	ta->prev = SvSTATE (prev);
		985	ta->next = SvSTATE (next);
		986	ta->flags = TRANSFER_SAVE_ALL;
		987	}
		988
		989	static void
		990	prepare_cede (struct transfer_args *ta)
		991	{
		992	LOCK;
		993	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		994	UNLOCK;
		995
		996	prepare_schedule (ta);
		997	}
		998
		999	static void
906	api_schedule (void)	1000	api_schedule (void)
907	{	1001	{
908	dTHX;	1002	dTHX;
		1003	struct transfer_args ta;
909		1004
910	SV *prev, *next;	1005	prepare_schedule (&ta);
911		1006	TRANSFER (ta);
912	LOCK;
913
914	prev = SvRV (GvSV (coro_current));
915	next = coro_deq (aTHX_ PRIO_MIN);
916
917	if (!next)
918	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
919
920	/* free this only after the transfer */
921	coro_mortal = prev;
922	SV_CORO (prev, "Coro::schedule");
923
924	SvRV (GvSV (coro_current)) = next;
925
926	SV_CORO (next, "Coro::schedule");
927
928	UNLOCK;
929
930	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
931	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
932	}	1007	}
933		1008
934	static void	1009	static void
935	api_cede (void)	1010	api_cede (void)
936	{	1011	{
937	dTHX;	1012	dTHX;
		1013	struct transfer_args ta;
938		1014
939	LOCK;	1015	prepare_cede (&ta);
940	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1016	TRANSFER (ta);
941	UNLOCK;
942
943	api_schedule ();
944	}	1017	}
945		1018
946	MODULE = Coro::State PACKAGE = Coro::State	1019	MODULE = Coro::State PACKAGE = Coro::State
947		1020
948	PROTOTYPES: ENABLE	1021	PROTOTYPES: DISABLE
949		1022
950	BOOT:	1023	BOOT:
951	{ /* {} necessary for stoopid perl-5.6.x */	1024	{
952	#ifdef USE_ITHREADS	1025	#ifdef USE_ITHREADS
953	MUTEX_INIT (&coro_mutex);	1026	MUTEX_INIT (&coro_mutex);
954	#endif	1027	#endif
		1028	BOOT_PAGESIZE;
955		1029
956	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
957	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
958	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1030	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
959		1031
960	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1032	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
961	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1033	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
962	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1034	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
963	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
964		1035
965	main_mainstack = PL_mainstack;	1036	main_mainstack = PL_mainstack;
966		1037
967	coroapi.ver = CORO_API_VERSION;	1038	coroapi.ver = CORO_API_VERSION;
968	coroapi.transfer = api_transfer;	1039	coroapi.transfer = api_transfer;
969	}
970		1040
971	Coro::State	1041	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
972	_newprocess(args)	1042	}
973	SV * args	1043
974	PROTOTYPE: $	1044	SV *
		1045	new (char *klass, ...)
975	CODE:	1046	CODE:
976	Coro__State coro;	1047	{
		1048	struct coro *coro;
		1049	HV *hv;
		1050	int i;
977		1051
978	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
979	croak ("Coro::State::_newprocess expects an arrayref");
980
981	Newz (0, coro, 1, struct coro);	1052	Newz (0, coro, 1, struct coro);
		1053	coro->args = newAV ();
982		1054
983	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1055	hv = newHV ();
		1056	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1057	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1058
		1059	for (i = 1; i < items; i++)
		1060	av_push (coro->args, newSVsv (ST (i)));
		1061
984	coro->mainstack = 0; /* actual work is done inside transfer */	1062	/*coro->mainstack = 0; *//*actual work is done inside transfer */
985	coro->stack = 0;	1063	/*coro->stack = 0;*/
986		1064	}
987	/* same as JMPENV_BOOTSTRAP */
988	/* we might be able to recycle start_env, but safe is safe */
989	//Zero(&coro->start_env, 1, JMPENV);
990	coro->start_env.je_ret = -1;
991	coro->start_env.je_mustcatch = TRUE;
992
993	RETVAL = coro;
994	OUTPUT:	1065	OUTPUT:
995	RETVAL	1066	RETVAL
996		1067
997	void	1068	void
998	transfer(prev, next, flags)	1069	_set_stacklevel (...)
999	SV *prev	1070	ALIAS:
1000	SV *next	1071	Coro::State::transfer = 1
1001	int flags	1072	Coro::schedule = 2
1002	PROTOTYPE: @	1073	Coro::cede = 3
		1074	Coro::Cont::yield = 4
1003	CODE:	1075	CODE:
1004	PUTBACK;	1076	{
1005	SV_CORO (next, "Coro::transfer");	1077	struct transfer_args ta;
1006	SV_CORO (prev, "Coro::transfer");	1078
1007	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1079	switch (ix)
1008	SPAGAIN;	1080	{
		1081	case 0:
		1082	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
		1083	ta.next = 0;
		1084	ta.flags = TRANSFER_SET_STACKLEVEL;
		1085	break;
		1086
		1087	case 1:
		1088	if (items != 3)
		1089	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1090
		1091	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1092	break;
		1093
		1094	case 2:
		1095	prepare_schedule (&ta);
		1096	break;
		1097
		1098	case 3:
		1099	prepare_cede (&ta);
		1100	break;
		1101
		1102	case 4:
		1103	{
		1104	SV *yieldstack;
		1105	SV *sv;
		1106	AV *defav = GvAV (PL_defgv);
		1107
		1108	yieldstack = *hv_fetch (
		1109	(HV *)SvRV (GvSV (coro_current)),
		1110	"yieldstack", sizeof ("yieldstack") - 1,
		1111	0
		1112	);
		1113
		1114	/* set up @_ -- ugly */
		1115	av_clear (defav);
		1116	av_fill (defav, items - 1);
		1117	while (items--)
		1118	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1119
		1120	sv = av_pop ((AV *)SvRV (yieldstack));
		1121	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1122	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1123	ta.flags = 0;
		1124	SvREFCNT_dec (sv);
		1125	}
		1126	break;
		1127
		1128	}
		1129
		1130	TRANSFER (ta);
		1131	}
1009		1132
1010	void	1133	void
1011	DESTROY(coro)	1134	_clone_state_from (SV *dst, SV *src)
1012	Coro::State coro	1135	CODE:
1013	CODE:	1136	{
		1137	struct coro *coro_src = SvSTATE (src);
1014		1138
1015	if (coro->mainstack && coro->mainstack != main_mainstack)	1139	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1016	{
1017	struct coro temp;
1018		1140
1019	PUTBACK;	1141	++coro_src->refcnt;
1020	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1142	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1021	LOAD(aTHX_ coro);	1143	}
1022	SPAGAIN;
1023
1024	destroy_stacks (aTHX);
1025
1026	LOAD((&temp)); /* this will get rid of defsv etc.. */
1027	SPAGAIN;
1028
1029	coro->mainstack = 0;
1030	}
1031
1032	deallocate_stack (coro);
1033	SvREFCNT_dec (coro->args);
1034	Safefree (coro);
1035		1144
1036	void	1145	void
1037	_exit(code)	1146	_exit (code)
1038	int code	1147	int code
1039	PROTOTYPE: $	1148	PROTOTYPE: $
1040	CODE:	1149	CODE:
1041	_exit (code);	1150	_exit (code);
1042		1151
1043	MODULE = Coro::State PACKAGE = Coro::Cont
1044
1045	# this is slightly dirty (should expose a c-level api)
1046
1047	void
1048	yield(...)
1049	PROTOTYPE: @
1050	CODE:
1051	static SV *returnstk;
1052	SV *sv;
1053	AV *defav = GvAV (PL_defgv);
1054	struct coro *prev, *next;
1055
1056	if (!returnstk)
1057	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1058
1059	/* set up @_ -- ugly */
1060	av_clear (defav);
1061	av_fill (defav, items - 1);
1062	while (items--)
1063	av_store (defav, items, SvREFCNT_inc (ST(items)));
1064
1065	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1066	sv = av_pop ((AV *)SvRV (returnstk));
1067	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1068	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1069	SvREFCNT_dec (sv);
1070
1071	transfer(aTHX_ prev, next, 0);
1072
1073	MODULE = Coro::State PACKAGE = Coro	1152	MODULE = Coro::State PACKAGE = Coro
1074		1153
1075	# this is slightly dirty (should expose a c-level api)
1076
1077	BOOT:	1154	BOOT:
1078	{	1155	{
1079	int i;	1156	int i;
		1157
1080	HV *stash = gv_stashpv ("Coro", TRUE);	1158	coro_stash = gv_stashpv ("Coro", TRUE);
1081		1159
1082	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1160	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1083	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1161	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1084	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1162	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1085	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1163	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1086	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1164	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1087	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1165	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1088		1166
1089	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1167	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1090	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1168	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1091		1169
1092	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1170	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1100	coroapi.ready = api_ready;	1178	coroapi.ready = api_ready;
1101	coroapi.nready = &coro_nready;	1179	coroapi.nready = &coro_nready;
1102	coroapi.current = coro_current;	1180	coroapi.current = coro_current;
1103		1181
1104	GCoroAPI = &coroapi;	1182	GCoroAPI = &coroapi;
1105	sv_setiv(sv, (IV)&coroapi);	1183	sv_setiv (sv, (IV)&coroapi);
1106	SvREADONLY_on(sv);	1184	SvREADONLY_on (sv);
1107	}	1185	}
1108	}	1186	}
1109		1187
1110	#if !PERL_MICRO	1188	int
		1189	prio (Coro::State coro, int newprio = 0)
		1190	ALIAS:
		1191	nice = 1
		1192	CODE:
		1193	{
		1194	RETVAL = coro->prio;
		1195
		1196	if (items > 1)
		1197	{
		1198	if (ix)
		1199	newprio += coro->prio;
		1200
		1201	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1202	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1203
		1204	coro->prio = newprio;
		1205	}
		1206	}
1111		1207
1112	void	1208	void
1113	ready(self)	1209	ready (SV *self)
1114	SV * self
1115	PROTOTYPE: $	1210	PROTOTYPE: $
1116	CODE:	1211	CODE:
1117	api_ready (self);	1212	api_ready (self);
1118		1213
1119	#endif
1120
1121	int	1214	int
1122	nready(...)	1215	nready (...)
1123	PROTOTYPE:	1216	PROTOTYPE:
1124	CODE:	1217	CODE:
1125	RETVAL = coro_nready;	1218	RETVAL = coro_nready;
1126	OUTPUT:	1219	OUTPUT:
1127	RETVAL	1220	RETVAL
1128		1221
		1222	MODULE = Coro::State PACKAGE = Coro::AIO
		1223
		1224	SV *
		1225	_get_state ()
		1226	CODE:
		1227	{
		1228	struct {
		1229	int errorno;
		1230	int laststype;
		1231	int laststatval;
		1232	Stat_t statcache;
		1233	} data;
		1234
		1235	data.errorno = errno;
		1236	data.laststype = PL_laststype;
		1237	data.laststatval = PL_laststatval;
		1238	data.statcache = PL_statcache;
		1239
		1240	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1241	}
		1242	OUTPUT:
		1243	RETVAL
		1244
1129	void	1245	void
1130	schedule(...)	1246	_set_state (char *data_)
1131	PROTOTYPE:	1247	PROTOTYPE: $
1132	CODE:	1248	CODE:
1133	api_schedule ();	1249	{
		1250	struct {
		1251	int errorno;
		1252	int laststype;
		1253	int laststatval;
		1254	Stat_t statcache;
		1255	} *data = (void *)data_;
1134		1256
1135	void	1257	errno = data->errorno;
1136	cede(...)	1258	PL_laststype = data->laststype;
1137	PROTOTYPE:	1259	PL_laststatval = data->laststatval;
1138	CODE:	1260	PL_statcache = data->statcache;
1139	api_cede ();	1261	}
1140

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