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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.50 by pcg, Sun Nov 30 16:59:15 2003 UTC vs.
Revision 1.99 by root, Sun Nov 26 23:53:20 2006 UTC

		1	#include "libcoro/coro.c"
		2
1	#include "EXTERN.h"	3	#include "EXTERN.h"
2	#include "perl.h"	4	#include "perl.h"
3	#include "XSUB.h"	5	#include "XSUB.h"
4		6
5	#include "patchlevel.h"	7	#include "patchlevel.h"
6		8
7	#if PATCHLEVEL < 6	9	#if PERL_VERSION < 6
8	# ifndef PL_ppaddr	10	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	11	# define PL_ppaddr ppaddr
10	# endif	12	# endif
11	# ifndef call_sv	13	# ifndef call_sv
12	# define call_sv perl_call_sv	14	# define call_sv perl_call_sv
…		…
23	# ifndef IS_PADCONST	25	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	26	# define IS_PADCONST(v) 0
25	# endif	27	# endif
26	#endif	28	#endif
27		29
28	#include "libcoro/coro.c"
29
30	#include <signal.h>	30	#include <stdio.h>
		31	#include <errno.h>
		32
		33	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		34	# undef STACKGUARD
		35	#endif
		36
		37	#ifndef STACKGUARD
		38	# define STACKGUARD 0
		39	#endif
31		40
32	#ifdef HAVE_MMAP	41	#ifdef HAVE_MMAP
33	# include <unistd.h>	42	# include <unistd.h>
34	# include <sys/mman.h>	43	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS	44	# ifndef MAP_ANONYMOUS
…		…
37	# define MAP_ANONYMOUS MAP_ANON	46	# define MAP_ANONYMOUS MAP_ANON
38	# else	47	# else
39	# undef HAVE_MMAP	48	# undef HAVE_MMAP
40	# endif	49	# endif
41	# endif	50	# endif
		51	# include <limits.h>
		52	# ifndef PAGESIZE
		53	# define PAGESIZE pagesize
		54	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		55	static long pagesize;
		56	# else
		57	# define BOOT_PAGESIZE
42	#endif	58	# endif
43		59	#endif
44	#define SUB_INIT "Coro::State::initialize"
45	#define UCORO_STATE "_coro_state"
46		60
47	/* The next macro should declare a variable stacklevel that contains and approximation	61	/* The next macro should declare a variable stacklevel that contains and approximation
48	* to the current C stack pointer. Its property is that it changes with each call	62	* to the current C stack pointer. Its property is that it changes with each call
49	* and should be unique. */	63	* and should be unique. */
		64	#define dSTACKLEVEL int stacklevel
50	#define dSTACKLEVEL void *stacklevel = &stacklevel	65	#define STACKLEVEL ((void *)&stacklevel)
51		66
52	#define IN_DESTRUCT (PL_main_cv == Nullcv)	67	#define IN_DESTRUCT (PL_main_cv == Nullcv)
53		68
54	#define labs(l) ((l) >= 0 ? (l) : -(l))
55
56	#include "CoroAPI.h"	69	#include "CoroAPI.h"
57		70
		71	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
		72
		73	#ifdef USE_ITHREADS
		74	static perl_mutex coro_mutex;
		75	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		76	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		77	#else
		78	# define LOCK (void)0
		79	# define UNLOCK (void)0
		80	#endif
		81
58	static struct CoroAPI coroapi;	82	static struct CoroAPI coroapi;
		83	static AV *main_mainstack; /* used to differentiate between $main and others */
		84	static HV *coro_state_stash, *coro_stash;
		85	static SV *coro_mortal; /* will be freed after next transfer */
59		86
60	/* this is actually not only the c stack but also c registers etc... */	87	/* this is a structure representing a c-level coroutine */
61	typedef struct {	88	typedef struct coro_stack {
62	int refcnt; /* pointer reference counter */	89	struct coro_stack *next;
63	int usecnt; /* shared by how many coroutines */
64	int gencnt; /* generation counter */
65		90
66	coro_context cctx;	91	/* the stack */
67
68	void *sptr;	92	void *sptr;
69	long ssize; /* positive == mmap, otherwise malloc */	93	long ssize; /* positive == mmap, otherwise malloc */
		94
		95	/* cpu state */
		96	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		97	JMPENV *top_env;
		98	coro_context cctx;
70	} coro_stack;	99	} coro_stack;
71		100
		101	/* this is a structure representing a perl-level coroutine */
72	struct coro {	102	struct coro {
73	/* the top-level JMPENV for each coroutine, needed to catch dies. */	103	/* the c coroutine allocated to this perl coroutine, if any */
74	JMPENV start_env;
75
76	/* the optional C context */
77	coro_stack *stack;	104	coro_stack *stack;
78	void *cursp;	105
		106	/* data associated with this coroutine (initial args) */
		107	AV *args;
79	int gencnt;	108	int refcnt;
80		109
81	/* optionally saved, might be zero */	110	/* optionally saved, might be zero */
82	AV *defav;	111	AV *defav;
83	SV *defsv;	112	SV *defsv;
84	SV *errsv;	113	SV *errsv;
…		…
93	AV *mainstack;	122	AV *mainstack;
94	SV **stack_sp;	123	SV **stack_sp;
95	OP *op;	124	OP *op;
96	SV **curpad;	125	SV **curpad;
97	AV *comppad;	126	AV *comppad;
		127	CV *compcv;
98	SV **stack_base;	128	SV **stack_base;
99	SV **stack_max;	129	SV **stack_max;
100	SV **tmps_stack;	130	SV **tmps_stack;
101	I32 tmps_floor;	131	I32 tmps_floor;
102	I32 tmps_ix;	132	I32 tmps_ix;
…		…
111	I32 savestack_ix;	141	I32 savestack_ix;
112	I32 savestack_max;	142	I32 savestack_max;
113	OP **retstack;	143	OP **retstack;
114	I32 retstack_ix;	144	I32 retstack_ix;
115	I32 retstack_max;	145	I32 retstack_max;
		146	PMOP *curpm;
116	COP *curcop;	147	COP *curcop;
117	JMPENV *top_env;
118		148
119	/* data associated with this coroutine (initial args) */	149	/* coro process data */
120	AV *args;	150	int prio;
121	};	151	};
122		152
123	typedef struct coro *Coro__State;	153	typedef struct coro *Coro__State;
124	typedef struct coro *Coro__State_or_hashref;	154	typedef struct coro *Coro__State_or_hashref;
125		155
126	static AV *main_mainstack; /* used to differentiate between $main and others */	156	static AV *
127	static HV *coro_state_stash;	157	coro_clone_padlist (CV *cv)
128	static SV *ucoro_state_sv;
129	static U32 ucoro_state_hash;
130	static HV *padlist_cache;
131	static SV *coro_mortal; /* will be freed after next transfer */
132
133	/* mostly copied from op.c:cv_clone2 */
134	STATIC AV *
135	clone_padlist (AV *protopadlist)
136	{	158	{
137	AV *av;	159	AV *padlist = CvPADLIST (cv);
138	I32 ix;
139	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
140	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
141	SV **pname = AvARRAY (protopad_name);
142	SV **ppad = AvARRAY (protopad);
143	I32 fname = AvFILLp (protopad_name);
144	I32 fpad = AvFILLp (protopad);
145	AV *newpadlist, *newpad_name, *newpad;	160	AV *newpadlist, *newpad;
146	SV **npad;
147
148	newpad_name = newAV ();
149	for (ix = fname; ix >= 0; ix--)
150	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
151
152	newpad = newAV ();
153	av_fill (newpad, AvFILLp (protopad));
154	npad = AvARRAY (newpad);
155		161
156	newpadlist = newAV ();	162	newpadlist = newAV ();
157	AvREAL_off (newpadlist);	163	AvREAL_off (newpadlist);
158	av_store (newpadlist, 0, (SV *) newpad_name);	164	#if PERL_VERSION < 9
		165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		166	#else
		167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		168	#endif
		169	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		170	--AvFILLp (padlist);
		171
		172	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
159	av_store (newpadlist, 1, (SV *) newpad);	173	av_store (newpadlist, 1, (SV *)newpad);
160
161	av = newAV (); /* will be @_ */
162	av_extend (av, 0);
163	av_store (newpad, 0, (SV *) av);
164	AvFLAGS (av) = AVf_REIFY;
165
166	for (ix = fpad; ix > 0; ix--)
167	{
168	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
169	if (namesv && namesv != &PL_sv_undef)
170	{
171	char *name = SvPVX (namesv); /* XXX */
172	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
173	{ /* lexical from outside? */
174	npad[ix] = SvREFCNT_inc (ppad[ix]);
175	}
176	else
177	{ /* our own lexical */
178	SV *sv;
179	if (*name == '&')
180	sv = SvREFCNT_inc (ppad[ix]);
181	else if (*name == '@')
182	sv = (SV *) newAV ();
183	else if (*name == '%')
184	sv = (SV *) newHV ();
185	else
186	sv = NEWSV (0, 0);
187	#ifdef SvPADBUSY
188	if (!SvPADBUSY (sv))
189	#endif
190	SvPADMY_on (sv);
191	npad[ix] = sv;
192	}
193	}
194	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
195	{
196	npad[ix] = SvREFCNT_inc (ppad[ix]);
197	}
198	else
199	{
200	SV *sv = NEWSV (0, 0);
201	SvPADTMP_on (sv);
202	npad[ix] = sv;
203	}
204	}
205
206	#if 0 /* return -ENOTUNDERSTOOD */
207	/* Now that vars are all in place, clone nested closures. */
208
209	for (ix = fpad; ix > 0; ix--) {
210	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
211	if (namesv
212	&& namesv != &PL_sv_undef
213	&& !(SvFLAGS(namesv) & SVf_FAKE)
214	&& *SvPVX(namesv) == '&'
215	&& CvCLONE(ppad[ix]))
216	{
217	CV *kid = cv_clone((CV*)ppad[ix]);
218	SvREFCNT_dec(ppad[ix]);
219	CvCLONE_on(kid);
220	SvPADMY_on(kid);
221	npad[ix] = (SV*)kid;
222	}
223	}
224	#endif
225		174
226	return newpadlist;	175	return newpadlist;
227	}	176	}
228		177
229	STATIC void	178	static void
230	free_padlist (AV *padlist)	179	free_padlist (AV *padlist)
231	{	180	{
232	/* may be during global destruction */	181	/* may be during global destruction */
233	if (SvREFCNT (padlist))	182	if (SvREFCNT (padlist))
234	{	183	{
…		…
248		197
249	SvREFCNT_dec ((SV*)padlist);	198	SvREFCNT_dec ((SV*)padlist);
250	}	199	}
251	}	200	}
252		201
253	STATIC int	202	static int
254	coro_cv_free (SV *sv, MAGIC *mg)	203	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
255	{	204	{
256	AV *padlist;	205	AV *padlist;
257	AV *av = (AV *)mg->mg_obj;	206	AV *av = (AV *)mg->mg_obj;
258		207
259	/* casting is fun. */	208	/* casting is fun. */
260	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	209	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
261	free_padlist (padlist);	210	free_padlist (padlist);
		211
		212	SvREFCNT_dec (av);
		213
		214	return 0;
262	}	215	}
263		216
264	#define PERL_MAGIC_coro PERL_MAGIC_ext	217	#define PERL_MAGIC_coro PERL_MAGIC_ext
265		218
266	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	219	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
267		220
268	/* the next two functions merely cache the padlists */	221	/* the next two functions merely cache the padlists */
269	STATIC void	222	static void
270	get_padlist (CV *cv)	223	get_padlist (CV *cv)
271	{	224	{
272	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	225	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
273		226
274	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	227	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
275	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	228	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
276	else	229	else
		230	{
		231	#if 0
		232	/* this is probably cleaner, but also slower? */
		233	CV *cp = Perl_cv_clone (cv);
		234	CvPADLIST (cv) = CvPADLIST (cp);
		235	CvPADLIST (cp) = 0;
		236	SvREFCNT_dec (cp);
		237	#else
277	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	238	CvPADLIST (cv) = coro_clone_padlist (cv);
		239	#endif
		240	}
278	}	241	}
279		242
280	STATIC void	243	static void
281	put_padlist (CV *cv)	244	put_padlist (CV *cv)
282	{	245	{
283	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	246	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
284		247
285	if (!mg)	248	if (!mg)
…		…
294	}	257	}
295		258
296	#define SB do {	259	#define SB do {
297	#define SE } while (0)	260	#define SE } while (0)
298		261
299	#define LOAD(state) load_state(aTHX_ (state));	262	#define LOAD(state) load_state((state));
300	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	263	#define SAVE(state,flags) save_state((state),(flags));
301		264
302	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	265	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
303		266
304	static void	267	static void
305	load_state(pTHX_ Coro__State c)	268	load_state(Coro__State c)
306	{	269	{
307	PL_dowarn = c->dowarn;	270	PL_dowarn = c->dowarn;
308	PL_in_eval = c->in_eval;	271	PL_in_eval = c->in_eval;
309		272
310	PL_curstackinfo = c->curstackinfo;	273	PL_curstackinfo = c->curstackinfo;
…		…
312	PL_mainstack = c->mainstack;	275	PL_mainstack = c->mainstack;
313	PL_stack_sp = c->stack_sp;	276	PL_stack_sp = c->stack_sp;
314	PL_op = c->op;	277	PL_op = c->op;
315	PL_curpad = c->curpad;	278	PL_curpad = c->curpad;
316	PL_comppad = c->comppad;	279	PL_comppad = c->comppad;
		280	PL_compcv = c->compcv;
317	PL_stack_base = c->stack_base;	281	PL_stack_base = c->stack_base;
318	PL_stack_max = c->stack_max;	282	PL_stack_max = c->stack_max;
319	PL_tmps_stack = c->tmps_stack;	283	PL_tmps_stack = c->tmps_stack;
320	PL_tmps_floor = c->tmps_floor;	284	PL_tmps_floor = c->tmps_floor;
321	PL_tmps_ix = c->tmps_ix;	285	PL_tmps_ix = c->tmps_ix;
…		…
327	PL_scopestack_ix = c->scopestack_ix;	291	PL_scopestack_ix = c->scopestack_ix;
328	PL_scopestack_max = c->scopestack_max;	292	PL_scopestack_max = c->scopestack_max;
329	PL_savestack = c->savestack;	293	PL_savestack = c->savestack;
330	PL_savestack_ix = c->savestack_ix;	294	PL_savestack_ix = c->savestack_ix;
331	PL_savestack_max = c->savestack_max;	295	PL_savestack_max = c->savestack_max;
		296	#if PERL_VERSION < 9
332	PL_retstack = c->retstack;	297	PL_retstack = c->retstack;
333	PL_retstack_ix = c->retstack_ix;	298	PL_retstack_ix = c->retstack_ix;
334	PL_retstack_max = c->retstack_max;	299	PL_retstack_max = c->retstack_max;
		300	#endif
		301	PL_curpm = c->curpm;
335	PL_curcop = c->curcop;	302	PL_curcop = c->curcop;
336	PL_top_env = c->top_env;
337		303
338	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
339	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
340	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	306	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
341		307
…		…
350		316
351	if (padlist)	317	if (padlist)
352	{	318	{
353	put_padlist (cv); /* mark this padlist as available */	319	put_padlist (cv); /* mark this padlist as available */
354	CvPADLIST(cv) = padlist;	320	CvPADLIST(cv) = padlist;
355	#ifdef USE_THREADS
356	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
357	#endif
358	}	321	}
359		322
360	++CvDEPTH(cv);	323	++CvDEPTH(cv);
361	}	324	}
362		325
363	PUTBACK;	326	PUTBACK;
364	}	327	}
365	}	328	}
366		329
367	static void	330	static void
368	save_state(pTHX_ Coro__State c, int flags)	331	save_state(Coro__State c, int flags)
369	{	332	{
370	{	333	{
371	dSP;	334	dSP;
372	I32 cxix = cxstack_ix;	335	I32 cxix = cxstack_ix;
373	PERL_CONTEXT *ccstk = cxstack;	336	PERL_CONTEXT *ccstk = cxstack;
…		…
389	if (CxTYPE(cx) == CXt_SUB)	352	if (CxTYPE(cx) == CXt_SUB)
390	{	353	{
391	CV *cv = cx->blk_sub.cv;	354	CV *cv = cx->blk_sub.cv;
392	if (CvDEPTH(cv))	355	if (CvDEPTH(cv))
393	{	356	{
394	#ifdef USE_THREADS
395	/*XPUSHs ((SV *)CvOWNER(cv));*/
396	/*CvOWNER(cv) = 0;*/
397	/*error must unlock this cv etc.. etc...*/
398	#endif
399	EXTEND (SP, CvDEPTH(cv)*2);	357	EXTEND (SP, CvDEPTH(cv)*2);
400		358
401	while (--CvDEPTH(cv))	359	while (--CvDEPTH(cv))
402	{	360	{
403	/* this tells the restore code to increment CvDEPTH */	361	/* this tells the restore code to increment CvDEPTH */
…		…
406	}	364	}
407		365
408	PUSHs ((SV *)CvPADLIST(cv));	366	PUSHs ((SV *)CvPADLIST(cv));
409	PUSHs ((SV *)cv);	367	PUSHs ((SV *)cv);
410		368
411	get_padlist (cv); /* this is a monster */	369	get_padlist (cv);
412	}	370	}
413	}	371	}
414	#ifdef CXt_FORMAT	372	#ifdef CXt_FORMAT
415	else if (CxTYPE(cx) == CXt_FORMAT)	373	else if (CxTYPE(cx) == CXt_FORMAT)
416	{	374	{
…		…
444	c->mainstack = PL_mainstack;	402	c->mainstack = PL_mainstack;
445	c->stack_sp = PL_stack_sp;	403	c->stack_sp = PL_stack_sp;
446	c->op = PL_op;	404	c->op = PL_op;
447	c->curpad = PL_curpad;	405	c->curpad = PL_curpad;
448	c->comppad = PL_comppad;	406	c->comppad = PL_comppad;
		407	c->compcv = PL_compcv;
449	c->stack_base = PL_stack_base;	408	c->stack_base = PL_stack_base;
450	c->stack_max = PL_stack_max;	409	c->stack_max = PL_stack_max;
451	c->tmps_stack = PL_tmps_stack;	410	c->tmps_stack = PL_tmps_stack;
452	c->tmps_floor = PL_tmps_floor;	411	c->tmps_floor = PL_tmps_floor;
453	c->tmps_ix = PL_tmps_ix;	412	c->tmps_ix = PL_tmps_ix;
…		…
459	c->scopestack_ix = PL_scopestack_ix;	418	c->scopestack_ix = PL_scopestack_ix;
460	c->scopestack_max = PL_scopestack_max;	419	c->scopestack_max = PL_scopestack_max;
461	c->savestack = PL_savestack;	420	c->savestack = PL_savestack;
462	c->savestack_ix = PL_savestack_ix;	421	c->savestack_ix = PL_savestack_ix;
463	c->savestack_max = PL_savestack_max;	422	c->savestack_max = PL_savestack_max;
		423	#if PERL_VERSION < 9
464	c->retstack = PL_retstack;	424	c->retstack = PL_retstack;
465	c->retstack_ix = PL_retstack_ix;	425	c->retstack_ix = PL_retstack_ix;
466	c->retstack_max = PL_retstack_max;	426	c->retstack_max = PL_retstack_max;
		427	#endif
		428	c->curpm = PL_curpm;
467	c->curcop = PL_curcop;	429	c->curcop = PL_curcop;
468	c->top_env = PL_top_env;
469	}	430	}
470		431
471	/*	432	/*
472	* allocate various perl stacks. This is an exact copy	433	* allocate various perl stacks. This is an exact copy
473	* of perl.c:init_stacks, except that it uses less memory	434	* of perl.c:init_stacks, except that it uses less memory
474	* on the assumption that coroutines do not usually need	435	* on the (sometimes correct) assumption that coroutines do
475	* a lot of stackspace.	436	* not usually need a lot of stackspace.
476	*/	437	*/
477	STATIC void	438	static void
478	coro_init_stacks (pTHX)	439	coro_init_stacks ()
479	{	440	{
480	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	441	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
481	PL_curstackinfo->si_type = PERLSI_MAIN;	442	PL_curstackinfo->si_type = PERLSI_MAIN;
482	PL_curstack = PL_curstackinfo->si_stack;	443	PL_curstack = PL_curstackinfo->si_stack;
483	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	444	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
…		…
505		466
506	New(54,PL_savestack,96,ANY);	467	New(54,PL_savestack,96,ANY);
507	PL_savestack_ix = 0;	468	PL_savestack_ix = 0;
508	PL_savestack_max = 96;	469	PL_savestack_max = 96;
509		470
		471	#if PERL_VERSION < 9
510	New(54,PL_retstack,8,OP*);	472	New(54,PL_retstack,8,OP*);
511	PL_retstack_ix = 0;	473	PL_retstack_ix = 0;
512	PL_retstack_max = 8;	474	PL_retstack_max = 8;
		475	#endif
513	}	476	}
514		477
515	/*	478	/*
516	* destroy the stacks, the callchain etc...	479	* destroy the stacks, the callchain etc...
517	*/	480	*/
518	STATIC void	481	static void
519	destroy_stacks(pTHX)	482	destroy_stacks()
520	{	483	{
521	if (!IN_DESTRUCT)	484	if (!IN_DESTRUCT)
522	{	485	{
523	/* is this ugly, I ask? */	486	/* is this ugly, I ask? */
524	while (PL_scopestack_ix)	487	LEAVE_SCOPE (0);
525	LEAVE;
526		488
527	/* sure it is, but more important: is it correct?? :/ */	489	/* sure it is, but more important: is it correct?? :/ */
528	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
529	FREETMPS;	490	FREETMPS;
		491
		492	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
530	}	493	}
531		494
532	while (PL_curstackinfo->si_next)	495	while (PL_curstackinfo->si_next)
533	PL_curstackinfo = PL_curstackinfo->si_next;	496	PL_curstackinfo = PL_curstackinfo->si_next;
534		497
535	while (PL_curstackinfo)	498	while (PL_curstackinfo)
536	{	499	{
537	PERL_SI *p = PL_curstackinfo->si_prev;	500	PERL_SI *p = PL_curstackinfo->si_prev;
538		501
539	{	502	{ /*D*//*remove*/
540	dSP;	503	dSP;
541	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);	504	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
542	PUTBACK; /* possibly superfluous */	505	PUTBACK; /* possibly superfluous */
543	}	506	}
544		507
545	if (!IN_DESTRUCT)	508	if (!IN_DESTRUCT)
546	{	509	{
547	dounwind(-1);	510	dounwind (-1);/*D*//*remove*/
548	SvREFCNT_dec(PL_curstackinfo->si_stack);	511	SvREFCNT_dec (PL_curstackinfo->si_stack);
549	}	512	}
550		513
551	Safefree(PL_curstackinfo->si_cxstack);	514	Safefree (PL_curstackinfo->si_cxstack);
552	Safefree(PL_curstackinfo);	515	Safefree (PL_curstackinfo);
553	PL_curstackinfo = p;	516	PL_curstackinfo = p;
554	}	517	}
555		518
556	Safefree(PL_tmps_stack);	519	Safefree (PL_tmps_stack);
557	Safefree(PL_markstack);	520	Safefree (PL_markstack);
558	Safefree(PL_scopestack);	521	Safefree (PL_scopestack);
559	Safefree(PL_savestack);	522	Safefree (PL_savestack);
		523	#if PERL_VERSION < 9
560	Safefree(PL_retstack);	524	Safefree (PL_retstack);
561	}
562
563	static void
564	allocate_stack (Coro__State ctx, int alloc)
565	{
566	coro_stack *stack;
567
568	New (0, stack, 1, coro_stack);
569
570	stack->refcnt = 1;
571	stack->usecnt = 1;
572	stack->gencnt = ctx->gencnt = 0;
573	if (alloc)
574	{
575	#if HAVE_MMAP
576	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
577	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
578	if (stack->sptr == (void *)-1)
579	#endif	525	#endif
580	{
581	/*FIXME*//*D*//* reasonable stack size! */
582	stack->ssize = -4096 * sizeof (long);
583	New (0, stack->sptr, 4096, long);
584	}
585	}
586	else
587	stack->sptr = 0;
588
589	ctx->stack = stack;
590	}	526	}
591		527
592	static void	528	static void
593	deallocate_stack (Coro__State ctx)	529	setup_coro (struct coro *coro)
594	{
595	coro_stack *stack = ctx->stack;
596
597	ctx->stack = 0;
598
599	if (stack)
600	{
601	if (!--stack->refcnt)
602	{
603	#ifdef HAVE_MMAP
604	if (stack->ssize > 0 && stack->sptr)
605	munmap (stack->sptr, stack->ssize);
606	else
607	#endif
608	Safefree (stack->sptr);
609
610	Safefree (stack);
611	}
612	else if (ctx->gencnt == stack->gencnt)
613	--stack->usecnt;
614	}
615	}
616
617	static void
618	setup_coro (void *arg)
619	{	530	{
620	/*	531	/*
621	* emulate part of the perl startup here.	532	* emulate part of the perl startup here.
622	*/	533	*/
		534	dTHX;
623	dSP;	535	dSP;
624	Coro__State ctx = (Coro__State)arg;	536	UNOP myop;
625	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);	537	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
626		538
627	coro_init_stacks (aTHX);	539	coro_init_stacks ();
628	/*PL_curcop = 0;*/	540	/*PL_curcop = 0;*/
629	/*PL_in_eval = PL_in_eval;*/ /* inherit */	541	/*PL_in_eval = PL_in_eval;*/ /* inherit */
630	SvREFCNT_dec (GvAV (PL_defgv));	542	SvREFCNT_dec (GvAV (PL_defgv));
631	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	543	GvAV (PL_defgv) = coro->args; coro->args = 0;
632		544
633	SPAGAIN;	545	SPAGAIN;
634		546
635	if (ctx->stack)
636	{
637	ctx->cursp = 0;
638
639	PUSHMARK(SP);
640	PUTBACK;
641	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
642
643	if (SvTRUE (ERRSV))
644	croak (NULL);
645	else
646	croak ("FATAL: CCTXT coroutine returned!");
647	}
648	else
649	{
650	UNOP myop;
651
652	PL_op = (OP *)&myop;
653
654	Zero(&myop, 1, UNOP);	547	Zero (&myop, 1, UNOP);
655	myop.op_next = Nullop;	548	myop.op_next = Nullop;
656	myop.op_flags = OPf_WANT_VOID;	549	myop.op_flags = OPf_WANT_VOID;
657		550
		551	PL_op = (OP *)&myop;
		552
658	PUSHMARK(SP);	553	PUSHMARK(SP);
659	XPUSHs (sub_init);	554	XPUSHs (sub_init);
660	/*
661	* the next line is slightly wrong, as PL_op->op_next
662	* is actually being executed so we skip the first op.
663	* that doesn't matter, though, since it is only
664	* pp_nextstate and we never return...
665	* ah yes, and I don't care anyways ;)
666	*/
667	PUTBACK;	555	PUTBACK;
668	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	556	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
669	SPAGAIN;	557	SPAGAIN;
670		558
671	ENTER; /* necessary e.g. for dounwind */	559	ENTER; /* necessary e.g. for dounwind */
672	}
673	}	560	}
674		561
675	static void	562	static void
676	continue_coro (void *arg)	563	free_coro_mortal ()
677	{	564	{
678	/*
679	* this is a _very_ stripped down perl interpreter ;)
680	*/
681	Coro__State ctx = (Coro__State)arg;
682	JMPENV coro_start_env;
683
684	PL_top_env = &ctx->start_env;
685
686	ctx->cursp = 0;
687	PL_op = PL_op->op_next;
688	CALLRUNOPS(aTHX);
689
690	abort ();
691	}
692
693	STATIC void
694	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)
695	{
696	dSTACKLEVEL;
697	static struct coro *xnext;
698
699	if (prev != next)
700	{
701	xnext = next;
702
703	if (next->mainstack)
704	{
705	SAVE (prev, flags);
706	LOAD (next);
707
708	/* mark this state as in-use */
709	next->mainstack = 0;
710	next->tmps_ix = -2;
711
712	/* stacklevel changed? if yes, grab the stack for us! */
713	if (flags & TRANSFER_SAVE_CCTXT)
714	{
715	if (!prev->stack)
716	allocate_stack (prev, 0);
717	else if (prev->cursp != stacklevel
718	&& prev->stack->usecnt > 1)
719	{
720	prev->gencnt = ++prev->stack->gencnt;
721	prev->stack->usecnt = 1;
722	}
723
724	/* has our stack been invalidated? */
725	if (next->stack && next->stack->gencnt != next->gencnt)
726	{
727	deallocate_stack (next);
728	allocate_stack (next, 1);
729	coro_create (&(next->stack->cctx),
730	continue_coro, (void *)next,
731	next->stack->sptr, labs (next->stack->ssize));
732	}
733
734	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
735	/* don't add any code here */
736	}
737
738	}
739	else if (next->tmps_ix == -2)
740	croak ("tried to transfer to running coroutine");
741	else
742	{
743	SAVE (prev, -1); /* first get rid of the old state */
744
745	if (flags & TRANSFER_SAVE_CCTXT)
746	{
747	if (!prev->stack)
748	allocate_stack (prev, 0);
749
750	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
751	{
752	PL_top_env = &next->start_env;
753
754	setup_coro (next);
755
756	prev->stack->refcnt++;
757	prev->stack->usecnt++;
758	next->stack = prev->stack;
759	next->gencnt = prev->gencnt;
760	}
761	else
762	{
763	assert (!next->stack);
764	allocate_stack (next, 1);
765	coro_create (&(next->stack->cctx),
766	setup_coro, (void *)next,
767	next->stack->sptr, labs (next->stack->ssize));
768	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
769	/* don't add any code here */
770	}
771	}
772	else
773	setup_coro (next);
774	}
775
776	/*
777	* xnext is now either prev or next, depending on wether
778	* we switched the c stack or not. that's why I use a global
779	* variable, that should become thread-specific at one point.
780	*/
781	xnext->cursp = stacklevel;
782	}
783
784	if (coro_mortal)	565	if (coro_mortal)
785	{	566	{
786	SvREFCNT_dec (coro_mortal);	567	SvREFCNT_dec (coro_mortal);
787	coro_mortal = 0;	568	coro_mortal = 0;
788	}	569	}
789	}	570	}
790		571
791	#define SV_CORO(sv,func) \	572	static void
792	do { \	573	prepare_cctx (coro_stack *cctx)
793	if (SvROK (sv)) \	574	{
794	sv = SvRV (sv); \	575	dSP;
795	\	576	UNOP myop;
796	if (SvTYPE(sv) == SVt_PVHV) \
797	{ \
798	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
799	\
800	if (!he) \
801	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
802	\
803	(sv) = SvRV (HeVAL(he)); \
804	} \
805	\
806	/* must also be changed inside Coro::Cont::yield */ \
807	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
808	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
809	\
810	} while(0)
811		577
812	#define SvSTATE(sv) (struct coro *)SvIV (sv)	578	Zero (&myop, 1, UNOP);
		579	myop.op_next = PL_op;
		580	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
813		581
		582	PUSHMARK(SP);
		583	EXTEND (SP, 2);
		584	PUSHs (newSViv (PTR2IV (cctx)));
		585	PUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
		586	PUTBACK;
		587	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		588	SPAGAIN;
		589	}
		590
		591	static void
		592	coro_run (void *arg)
		593	{
		594	/*
		595	* this is a _very_ stripped down perl interpreter ;)
		596	*/
		597	UNLOCK;
		598
		599	PL_top_env = &PL_start_env;
		600	prepare_cctx ((coro_stack *)arg);
		601
		602	/* somebody will hit me for both perl_run and PL_restartop */
		603	perl_run (PERL_GET_CONTEXT);
		604
		605	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
		606	abort ();
		607	}
		608
		609	static coro_stack *
		610	stack_new ()
		611	{
		612	coro_stack *stack;
		613
		614	New (0, stack, 1, coro_stack);
		615
		616	#if HAVE_MMAP
		617
		618	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		619	/* mmap suppsedly does allocate-on-write for us */
		620	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		621
		622	if (stack->sptr == (void *)-1)
		623	{
		624	perror ("FATAL: unable to mmap stack for coroutine");
		625	_exit (EXIT_FAILURE);
		626	}
		627
		628	# if STACKGUARD
		629	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		630	# endif
		631
		632	#else
		633
		634	stack->ssize = STACKSIZE * (long)sizeof (long);
		635	New (0, stack->sptr, STACKSIZE, long);
		636
		637	if (!stack->sptr)
		638	{
		639	perror (stderr, "FATAL: unable to malloc stack for coroutine");
		640	_exit (EXIT_FAILURE);
		641	}
		642
		643	#endif
		644
		645	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);
		646
		647	return stack;
		648	}
		649
		650	static void
		651	stack_free (coro_stack *stack)
		652	{
		653	if (!stack)
		654	return;
		655
		656	#if HAVE_MMAP
		657	munmap (stack->sptr, stack->ssize);
		658	#else
		659	Safefree (stack->sptr);
		660	#endif
		661
		662	Safefree (stack);
		663	}
		664
		665	static coro_stack *stack_first;
		666
		667	static coro_stack *
		668	stack_get ()
		669	{
		670	coro_stack *stack;
		671
		672	if (stack_first)
		673	{
		674	stack = stack_first;
		675	stack_first = stack->next;
		676	}
		677	else
		678	{
		679	stack = stack_new ();
		680	PL_op = PL_op->op_next;
		681	}
		682
		683	return stack;
		684	}
		685
		686	static void
		687	stack_put (coro_stack *stack)
		688	{
		689	stack->next = stack_first;
		690	stack_first = stack;
		691	}
		692
		693	/* never call directly, always through the coro_state_transfer global variable */
		694	static void
		695	transfer_impl (struct coro *prev, struct coro *next, int flags)
		696	{
		697	dSTACKLEVEL;
		698
		699	/* sometimes transfer is only called to set idle_sp */
		700	if (flags == TRANSFER_SET_STACKLEVEL)
		701	((coro_stack *)prev)->idle_sp = STACKLEVEL;
		702	else if (prev != next)
		703	{
		704	coro_stack *prev__stack;
		705
		706	LOCK;
		707
		708	if (next->mainstack)
		709	{
		710	/* coroutine already started */
		711	SAVE (prev, flags);
		712	LOAD (next);
		713	}
		714	else
		715	{
		716	/* need to start coroutine */
		717	/* first get rid of the old state */
		718	SAVE (prev, -1);
		719	/* setup coroutine call */
		720	setup_coro (next);
		721	/* need a stack */
		722	next->stack = 0;
		723	}
		724
		725	if (!prev->stack)
		726	/* create a new empty context */
		727	Newz (0, prev->stack, 1, coro_stack);
		728
		729	prev__stack = prev->stack;
		730
		731	/* possibly "free" the stack */
		732	if (prev__stack->idle_sp == STACKLEVEL)
		733	{
		734	stack_put (prev__stack);
		735	prev->stack = 0;
		736	}
		737
		738	if (!next->stack)
		739	next->stack = stack_get ();
		740
		741	if (prev__stack != next->stack)
		742	{
		743	prev__stack->top_env = PL_top_env;
		744	PL_top_env = next->stack->top_env;
		745	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
		746	}
		747
		748	free_coro_mortal ();
		749
		750	UNLOCK;
		751	}
		752	}
		753
		754	/* use this function pointer to call the above function */
		755	/* this is done to increase chances of the compiler not inlining the call */
		756	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
		757	void (*coro_state_transfer)(struct coro *prev, struct coro *next, int flags) = transfer_impl;
		758
		759	struct transfer_args
		760	{
		761	struct coro *prev, *next;
		762	int flags;
		763	};
		764
		765	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)
		766
		767	static void
		768	coro_state_destroy (struct coro *coro)
		769	{
		770	if (coro->refcnt--)
		771	return;
		772
		773	if (coro->mainstack && coro->mainstack != main_mainstack)
		774	{
		775	struct coro temp;
		776
		777	SAVE ((&temp), TRANSFER_SAVE_ALL);
		778	LOAD (coro);
		779
		780	destroy_stacks ();
		781
		782	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		783
		784	coro->mainstack = 0;
		785	}
		786
		787	stack_free (coro->stack);
		788	SvREFCNT_dec (coro->args);
		789	Safefree (coro);
		790	}
		791
814	static void	792	static int
		793	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		794	{
		795	struct coro *coro = (struct coro *)mg->mg_ptr;
		796	mg->mg_ptr = 0;
		797
		798	coro_state_destroy (coro);
		799
		800	return 0;
		801	}
		802
		803	static int
		804	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		805	{
		806	struct coro *coro = (struct coro *)mg->mg_ptr;
		807
		808	++coro->refcnt;
		809
		810	return 0;
		811	}
		812
		813	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };
		814
		815	static struct coro *
		816	SvSTATE (SV *coro)
		817	{
		818	HV *stash;
		819	MAGIC *mg;
		820
		821	if (SvROK (coro))
		822	coro = SvRV (coro);
		823
		824	stash = SvSTASH (coro);
		825	if (stash != coro_stash && stash != coro_state_stash)
		826	{
		827	/* very slow, but rare, check */
		828	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		829	croak ("Coro::State object required");
		830	}
		831
		832	mg = SvMAGIC (coro);
		833	assert (mg->mg_type == PERL_MAGIC_ext);
		834	return (struct coro *)mg->mg_ptr;
		835	}
		836
		837	static void
		838	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		839	{
		840	ta->prev = SvSTATE (prev);
		841	ta->next = SvSTATE (next);
		842	ta->flags = flags;
		843	}
		844
		845	static void
815	api_transfer(pTHX_ SV *prev, SV *next, int flags)	846	api_transfer (SV *prev, SV *next, int flags)
816	{	847	{
817	SV_CORO (prev, "Coro::transfer");	848	dTHX;
818	SV_CORO (next, "Coro::transfer");	849	struct transfer_args ta;
819		850
820	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	851	prepare_transfer (&ta, prev, next, flags);
		852	TRANSFER (ta);
821	}	853	}
822		854
823	/** Coro ********************************************************************/	855	/** Coro ********************************************************************/
824		856
825	#define PRIO_MAX 3	857	#define PRIO_MAX 3
…		…
829	#define PRIO_IDLE -3	861	#define PRIO_IDLE -3
830	#define PRIO_MIN -4	862	#define PRIO_MIN -4
831		863
832	/* for Coro.pm */	864	/* for Coro.pm */
833	static GV *coro_current, *coro_idle;	865	static GV *coro_current, *coro_idle;
834	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	866	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
835	static int coro_nready;	867	static int coro_nready;
836		868
837	static void	869	static void
838	coro_enq (SV *sv)	870	coro_enq (SV *sv)
839	{	871	{
		872	int prio;
		873
840	if (SvTYPE (sv) == SVt_PVHV)	874	if (SvTYPE (sv) != SVt_PVHV)
841	{
842	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
843	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
844
845	prio = prio > PRIO_MAX ? PRIO_MAX
846	: prio < PRIO_MIN ? PRIO_MIN
847	: prio;
848
849	av_push (coro_ready [prio - PRIO_MIN], sv);
850	coro_nready++;
851
852	return;
853	}
854
855	croak ("Coro::ready tried to enqueue something that is not a coroutine");	875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
		876
		877	prio = SvSTATE (sv)->prio;
		878
		879	av_push (coro_ready [prio - PRIO_MIN], sv);
		880	coro_nready++;
856	}	881	}
857		882
858	static SV *	883	static SV *
859	coro_deq (int min_prio)	884	coro_deq (int min_prio)
860	{	885	{
…		…
863	min_prio -= PRIO_MIN;	888	min_prio -= PRIO_MIN;
864	if (min_prio < 0)	889	if (min_prio < 0)
865	min_prio = 0;	890	min_prio = 0;
866		891
867	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	892	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
868	if (av_len (coro_ready[prio]) >= 0)	893	if (AvFILLp (coro_ready [prio]) >= 0)
869	{	894	{
870	coro_nready--;	895	coro_nready--;
871	return av_shift (coro_ready[prio]);	896	return av_shift (coro_ready [prio]);
872	}	897	}
873		898
874	return 0;	899	return 0;
875	}	900	}
876		901
877	static void	902	static void
878	api_ready (SV *coro)	903	api_ready (SV *coro)
879	{	904	{
		905	dTHX;
		906
880	if (SvROK (coro))	907	if (SvROK (coro))
881	coro = SvRV (coro);	908	coro = SvRV (coro);
882		909
		910	LOCK;
883	coro_enq (SvREFCNT_inc (coro));	911	coro_enq (SvREFCNT_inc (coro));
		912	UNLOCK;
		913	}
		914
		915	static void
		916	prepare_schedule (struct transfer_args *ta)
		917	{
		918	SV *current, *prev, *next;
		919
		920	current = GvSV (coro_current);
		921
		922	for (;;)
		923	{
		924	LOCK;
		925	next = coro_deq (PRIO_MIN);
		926	UNLOCK;
		927
		928	if (next)
		929	break;
		930
		931	{
		932	dSP;
		933
		934	ENTER;
		935	SAVETMPS;
		936
		937	PUSHMARK (SP);
		938	PUTBACK;
		939	call_sv (GvSV (coro_idle), G_DISCARD);
		940
		941	FREETMPS;
		942	LEAVE;
		943	}
		944	}
		945
		946	prev = SvRV (current);
		947	SvRV (current) = next;
		948
		949	/* free this only after the transfer */
		950	LOCK;
		951	free_coro_mortal ();
		952	UNLOCK;
		953	coro_mortal = prev;
		954
		955	ta->prev = SvSTATE (prev);
		956	ta->next = SvSTATE (next);
		957	ta->flags = TRANSFER_SAVE_ALL;
		958	}
		959
		960	static void
		961	prepare_cede (struct transfer_args *ta)
		962	{
		963	LOCK;
		964	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		965	UNLOCK;
		966
		967	prepare_schedule (ta);
884	}	968	}
885		969
886	static void	970	static void
887	api_schedule (void)	971	api_schedule (void)
888	{	972	{
889	SV *prev, *next;	973	dTHX;
		974	struct transfer_args ta;
890		975
891	prev = SvRV (GvSV (coro_current));	976	prepare_schedule (&ta);
892	next = coro_deq (PRIO_MIN);	977	TRANSFER (ta);
893
894	if (!next)
895	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
896
897	/* free this only after the transfer */
898	coro_mortal = prev;
899	SV_CORO (prev, "Coro::schedule");
900
901	SvRV (GvSV (coro_current)) = next;
902
903	SV_CORO (next, "Coro::schedule");
904
905	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
906	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
907	}	978	}
908		979
909	static void	980	static void
910	api_cede (void)	981	api_cede (void)
911	{	982	{
912	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	983	dTHX;
		984	struct transfer_args ta;
913		985
914	api_schedule ();	986	prepare_cede (&ta);
		987	TRANSFER (ta);
915	}	988	}
916		989
917	MODULE = Coro::State PACKAGE = Coro::State	990	MODULE = Coro::State PACKAGE = Coro::State
918		991
919	PROTOTYPES: ENABLE	992	PROTOTYPES: DISABLE
920		993
921	BOOT:	994	BOOT:
922	{ /* {} necessary for stoopid perl-5.6.x */	995	{
923	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	996	#ifdef USE_ITHREADS
924	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	997	MUTEX_INIT (&coro_mutex);
		998	#endif
		999	BOOT_PAGESIZE;
		1000
925	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
926		1002
927	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
928	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
929	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
930	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
931
932	if (!padlist_cache)
933	padlist_cache = newHV ();
934		1006
935	main_mainstack = PL_mainstack;	1007	main_mainstack = PL_mainstack;
936		1008
937	coroapi.ver = CORO_API_VERSION;	1009	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1010	coroapi.transfer = api_transfer;
939	}
940		1011
941	Coro::State	1012	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1013	}
943	SV * args	1014
944	PROTOTYPE: $	1015	SV *
		1016	new (char *klass, ...)
945	CODE:	1017	CODE:
946	Coro__State coro;	1018	{
		1019	struct coro *coro;
		1020	HV *hv;
		1021	int i;
947		1022
948	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
949	croak ("Coro::State::_newprocess expects an arrayref");
950
951	Newz (0, coro, 1, struct coro);	1023	Newz (0, coro, 1, struct coro);
		1024	coro->args = newAV ();
952		1025
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1026	hv = newHV ();
		1027	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1028	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1029
		1030	for (i = 1; i < items; i++)
		1031	av_push (coro->args, newSVsv (ST (i)));
		1032
954	coro->mainstack = 0; /* actual work is done inside transfer */	1033	/*coro->mainstack = 0; *//*actual work is done inside transfer */
955	coro->stack = 0;	1034	/*coro->stack = 0;*/
956		1035	}
957	/* same as JMPENV_BOOTSTRAP */
958	/* we might be able to recycle start_env, but safe is safe */
959	//Zero(&coro->start_env, 1, JMPENV);
960	coro->start_env.je_ret = -1;
961	coro->start_env.je_mustcatch = TRUE;
962
963	RETVAL = coro;
964	OUTPUT:	1036	OUTPUT:
965	RETVAL	1037	RETVAL
966		1038
967	void	1039	void
968	transfer(prev, next, flags)	1040	_set_stacklevel (...)
969	SV *prev	1041	ALIAS:
970	SV *next	1042	Coro::State::transfer = 1
971	int flags	1043	Coro::schedule = 2
972	PROTOTYPE: @	1044	Coro::cede = 3
		1045	Coro::Cont::yield = 4
973	CODE:	1046	CODE:
974	PUTBACK;	1047	{
975	SV_CORO (next, "Coro::transfer");	1048	struct transfer_args ta;
976	SV_CORO (prev, "Coro::transfer");	1049
977	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1050	switch (ix)
978	SPAGAIN;	1051	{
		1052	case 0:
		1053	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));
		1054	ta.next = 0;
		1055	ta.flags = TRANSFER_SET_STACKLEVEL;
		1056	break;
		1057
		1058	case 1:
		1059	if (items != 3)
		1060	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1061
		1062	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1063	break;
		1064
		1065	case 2:
		1066	prepare_schedule (&ta);
		1067	break;
		1068
		1069	case 3:
		1070	prepare_cede (&ta);
		1071	break;
		1072
		1073	case 4:
		1074	{
		1075	SV *yieldstack;
		1076	SV *sv;
		1077	AV *defav = GvAV (PL_defgv);
		1078
		1079	yieldstack = *hv_fetch (
		1080	(HV *)SvRV (GvSV (coro_current)),
		1081	"yieldstack", sizeof ("yieldstack") - 1,
		1082	0
		1083	);
		1084
		1085	/* set up @_ -- ugly */
		1086	av_clear (defav);
		1087	av_fill (defav, items - 1);
		1088	while (items--)
		1089	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1090
		1091	sv = av_pop ((AV *)SvRV (yieldstack));
		1092	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1093	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1094	ta.flags = 0;
		1095	SvREFCNT_dec (sv);
		1096	}
		1097	break;
		1098
		1099	}
		1100
		1101	TRANSFER (ta);
		1102	}
979		1103
980	void	1104	void
981	DESTROY(coro)	1105	_clone_state_from (SV *dst, SV *src)
982	Coro::State coro	1106	CODE:
983	CODE:	1107	{
		1108	struct coro *coro_src = SvSTATE (src);
984		1109
985	if (coro->mainstack && coro->mainstack != main_mainstack)	1110	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
986	{
987	struct coro temp;
988		1111
989	PUTBACK;	1112	++coro_src->refcnt;
990	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1113	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
991	LOAD(aTHX_ coro);	1114	}
992	SPAGAIN;
993
994	destroy_stacks (aTHX);
995
996	LOAD((&temp)); /* this will get rid of defsv etc.. */
997	SPAGAIN;
998
999	coro->mainstack = 0;
1000	}
1001
1002	deallocate_stack (coro);
1003	SvREFCNT_dec (coro->args);
1004	Safefree (coro);
1005		1115
1006	void	1116	void
		1117	_nonlocal_goto (IV nextop)
		1118	CODE:
		1119	/* uuh, somebody will kill me again for this */
		1120	PL_op->op_next = INT2PTR (OP *, nextop);
		1121
		1122	void
1007	_exit(code)	1123	_exit (code)
1008	int code	1124	int code
1009	PROTOTYPE: $	1125	PROTOTYPE: $
1010	CODE:	1126	CODE:
1011	#if defined(__GLIBC__) || _POSIX_C_SOURCE
1012	_exit (code);	1127	_exit (code);
1013	#else
1014	signal (SIGTERM, SIG_DFL);
1015	raise (SIGTERM);
1016	exit (code);
1017	#endif
1018
1019	MODULE = Coro::State PACKAGE = Coro::Cont
1020
1021	# this is slightly dirty (should expose a c-level api)
1022
1023	void
1024	yield(...)
1025	PROTOTYPE: @
1026	CODE:
1027	static SV *returnstk;
1028	SV *sv;
1029	AV *defav = GvAV (PL_defgv);
1030	struct coro *prev, *next;
1031
1032	if (!returnstk)
1033	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1034
1035	/* set up @_ -- ugly */
1036	av_clear (defav);
1037	av_fill (defav, items - 1);
1038	while (items--)
1039	av_store (defav, items, SvREFCNT_inc (ST(items)));
1040
1041	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1042	sv = av_pop ((AV *)SvRV (returnstk));
1043	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1044	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1045	SvREFCNT_dec (sv);
1046
1047	transfer(aTHX_ prev, next, 0);
1048		1128
1049	MODULE = Coro::State PACKAGE = Coro	1129	MODULE = Coro::State PACKAGE = Coro
1050		1130
1051	# this is slightly dirty (should expose a c-level api)
1052
1053	BOOT:	1131	BOOT:
1054	{	1132	{
1055	int i;	1133	int i;
		1134
1056	HV *stash = gv_stashpv ("Coro", TRUE);	1135	coro_stash = gv_stashpv ("Coro", TRUE);
1057		1136
1058	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1137	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1059	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1138	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1060	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1061	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1062	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1063	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1064		1143
1065	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1144	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1066	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1145	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1067		1146
1068	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1147	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1076	coroapi.ready = api_ready;	1155	coroapi.ready = api_ready;
1077	coroapi.nready = &coro_nready;	1156	coroapi.nready = &coro_nready;
1078	coroapi.current = coro_current;	1157	coroapi.current = coro_current;
1079		1158
1080	GCoroAPI = &coroapi;	1159	GCoroAPI = &coroapi;
1081	sv_setiv(sv, (IV)&coroapi);	1160	sv_setiv (sv, (IV)&coroapi);
1082	SvREADONLY_on(sv);	1161	SvREADONLY_on (sv);
1083	}	1162	}
1084	}	1163	}
1085		1164
1086	#if !PERL_MICRO	1165	int
		1166	prio (Coro::State coro, int newprio = 0)
		1167	ALIAS:
		1168	nice = 1
		1169	CODE:
		1170	{
		1171	RETVAL = coro->prio;
		1172
		1173	if (items > 1)
		1174	{
		1175	if (ix)
		1176	newprio += coro->prio;
		1177
		1178	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1179	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1180
		1181	coro->prio = newprio;
		1182	}
		1183	}
1087		1184
1088	void	1185	void
1089	ready(self)	1186	ready (SV *self)
1090	SV * self
1091	PROTOTYPE: $	1187	PROTOTYPE: $
1092	CODE:	1188	CODE:
1093	api_ready (self);	1189	api_ready (self);
1094		1190
1095	#endif
1096
1097	int	1191	int
1098	nready(...)	1192	nready (...)
1099	PROTOTYPE:	1193	PROTOTYPE:
1100	CODE:	1194	CODE:
1101	RETVAL = coro_nready;	1195	RETVAL = coro_nready;
1102	OUTPUT:	1196	OUTPUT:
1103	RETVAL	1197	RETVAL
1104		1198
		1199	MODULE = Coro::State PACKAGE = Coro::AIO
		1200
		1201	SV *
		1202	_get_state ()
		1203	CODE:
		1204	{
		1205	struct {
		1206	int errorno;
		1207	int laststype;
		1208	int laststatval;
		1209	Stat_t statcache;
		1210	} data;
		1211
		1212	data.errorno = errno;
		1213	data.laststype = PL_laststype;
		1214	data.laststatval = PL_laststatval;
		1215	data.statcache = PL_statcache;
		1216
		1217	RETVAL = newSVpvn ((char *)&data, sizeof data);
		1218	}
		1219	OUTPUT:
		1220	RETVAL
		1221
1105	void	1222	void
1106	schedule(...)	1223	_set_state (char *data_)
1107	PROTOTYPE:	1224	PROTOTYPE: $
1108	CODE:	1225	CODE:
1109	api_schedule ();	1226	{
		1227	struct {
		1228	int errorno;
		1229	int laststype;
		1230	int laststatval;
		1231	Stat_t statcache;
		1232	} *data = (void *)data_;
1110		1233
1111	void	1234	errno = data->errorno;
1112	cede(...)	1235	PL_laststype = data->laststype;
1113	PROTOTYPE:	1236	PL_laststatval = data->laststatval;
1114	CODE:	1237	PL_statcache = data->statcache;
1115	api_cede ();	1238	}
1116

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