ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.94 by root, Sun Nov 26 17:14:15 2006 UTC vs.
Revision 1.125 by root, Mon Dec 11 20:54:45 2006 UTC

1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	#if PERL_VERSION < 6	9	#if USE_VALGRIND
		10	# include <valgrind/valgrind.h>
		11	#endif
		12
		13	/* the maximum number of idle cctx that will be pooled */
		14	#define MAX_IDLE_CCTX 8
		15
		16	#define PERL_VERSION_ATLEAST(a,b,c) \
		17	(PERL_REVISION > (a) \
		18	|| (PERL_REVISION == (a) \
		19	&& (PERL_VERSION > (b) \
		20	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		21
		22	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	23	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	24	# define PL_ppaddr ppaddr
14	# endif	25	# endif
15	# ifndef call_sv	26	# ifndef call_sv
16	# define call_sv perl_call_sv	27	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	38	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	39	# define IS_PADCONST(v) 0
29	# endif	40	# endif
30	#endif	41	#endif
31		42
		43	/* 5.8.7 */
		44	#ifndef SvRV_set
		45	# define SvRV_set(s,v) SvRV(s) = (v)
		46	#endif
		47
32	#include <stdio.h>	48	#include <stdio.h>
33	#include <errno.h>	49	#include <errno.h>
		50	#include <assert.h>
34		51
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	52	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	53	# undef STACKGUARD
37	#endif	54	#endif
38		55
…		…
54	# ifndef PAGESIZE	71	# ifndef PAGESIZE
55	# define PAGESIZE pagesize	72	# define PAGESIZE pagesize
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)	73	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;	74	static long pagesize;
58	# else	75	# else
59	# define BOOT_PAGESIZE	76	# define BOOT_PAGESIZE (void)0
60	# endif	77	# endif
		78	#else
		79	# define PAGESIZE 0
		80	# define BOOT_PAGESIZE (void)0
61	#endif	81	#endif
62		82
63	/* The next macro should declare a variable stacklevel that contains and approximation	83	/* The next macro should declare a variable stacklevel that contains and approximation
64	* to the current C stack pointer. Its property is that it changes with each call	84	* to the current C stack pointer. Its property is that it changes with each call
65	* and should be unique. */	85	* and should be unique. */
66	#define dSTACKLEVEL int stacklevel	86	#define dSTACKLEVEL int stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	87	#define STACKLEVEL ((void *)&stacklevel)
68		88
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	89	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		90
		91	#if __GNUC__ >= 3
		92	# define attribute(x) __attribute__(x)
		93	#else
		94	# define attribute(x)
		95	#endif
		96
		97	#define NOINLINE attribute ((noinline))
		98
71	#include "CoroAPI.h"	99	#include "CoroAPI.h"
72
73	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74		100
75	#ifdef USE_ITHREADS	101	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	102	static perl_mutex coro_mutex;
77	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	103	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	104	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79	#else	105	#else
80	# define LOCK (void)0	106	# define LOCK (void)0
81	# define UNLOCK (void)0	107	# define UNLOCK (void)0
82	#endif	108	#endif
83		109
		110	struct io_state
		111	{
		112	int errorno;
		113	I32 laststype;
		114	int laststatval;
		115	Stat_t statcache;
		116	};
		117
84	static struct CoroAPI coroapi;	118	static struct CoroAPI coroapi;
85	static AV *main_mainstack; /* used to differentiate between $main and others */	119	static AV *main_mainstack; /* used to differentiate between $main and others */
86	static HV *coro_state_stash, *coro_stash;	120	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	121	static SV *coro_mortal; /* will be freed after next transfer */
88		122
		123	static struct coro_cctx *cctx_first;
		124	static int cctx_count, cctx_idle;
		125
89	/* this is a structure representing a c-level coroutine */	126	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	127	typedef struct coro_cctx {
91	struct coro_stack *next;	128	struct coro_cctx *next;
92		129
93	/* the stack */	130	/* the stack */
94	void *sptr;	131	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	132	long ssize; /* positive == mmap, otherwise malloc */
96		133
97	/* cpu state */	134	/* cpu state */
98	void *idle_sp; /* original stacklevel when coroutine was created */	135	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
99	JMPENV *top_env;	136	JMPENV *top_env;
100	coro_context cctx;	137	coro_context cctx;
101	} coro_stack;
102		138
103	/* the (fake) coro_stack representing the main program */	139	int inuse;
104	static coro_stack *main_stack;	140
		141	#if USE_VALGRIND
		142	int valgrind_id;
		143	#endif
		144	} coro_cctx;
		145
		146	enum {
		147	CF_RUNNING = 0x0001, /* coroutine is running */
		148	CF_READY = 0x0002, /* coroutine is ready */
		149	CF_NEW = 0x0004, /* ahs never been switched to */
		150	};
105		151
106	/* this is a structure representing a perl-level coroutine */	152	/* this is a structure representing a perl-level coroutine */
107	struct coro {	153	struct coro {
108	/* the c coroutine allocated to this perl coroutine, if any */	154	/* the c coroutine allocated to this perl coroutine, if any */
109	coro_stack *stack;	155	coro_cctx *cctx;
110		156
111	/* data associated with this coroutine (initial args) */	157	/* data associated with this coroutine (initial args) */
112	AV *args;	158	AV *args;
113	int refcnt;	159	int refcnt;
		160	int save; /* CORO_SAVE flags */
		161	int flags; /* CF_ flags */
114		162
115	/* optionally saved, might be zero */	163	/* optionally saved, might be zero */
116	AV *defav;	164	AV *defav; /* @_ */
117	SV *defsv;	165	SV *defsv; /* $_ */
118	SV *errsv;	166	SV *errsv; /* $@ */
		167	SV *irssv; /* $/ */
		168	SV *irssv_sv; /* real $/ cache */
119		169
120	/* saved global state not related to stacks */	170	#define VAR(name,type) type name;
121	U8 dowarn;	171	# include "state.h"
122	I32 in_eval;	172	#undef VAR
123
124	/* the stacks and related info (callchain etc..) */
125	PERL_SI *curstackinfo;
126	AV *curstack;
127	AV *mainstack;
128	SV **stack_sp;
129	OP *op;
130	SV **curpad;
131	AV *comppad;
132	CV *compcv;
133	SV **stack_base;
134	SV **stack_max;
135	SV **tmps_stack;
136	I32 tmps_floor;
137	I32 tmps_ix;
138	I32 tmps_max;
139	I32 *markstack;
140	I32 *markstack_ptr;
141	I32 *markstack_max;
142	I32 *scopestack;
143	I32 scopestack_ix;
144	I32 scopestack_max;
145	ANY *savestack;
146	I32 savestack_ix;
147	I32 savestack_max;
148	OP **retstack;
149	I32 retstack_ix;
150	I32 retstack_max;
151	PMOP *curpm;
152	COP *curcop;
153		173
154	/* coro process data */	174	/* coro process data */
155	int prio;	175	int prio;
156	};	176	};
157		177
158	typedef struct coro *Coro__State;	178	typedef struct coro *Coro__State;
159	typedef struct coro *Coro__State_or_hashref;	179	typedef struct coro *Coro__State_or_hashref;
160		180
161	static AV *	181	static AV *
162	coro_clone_padlist (pTHX_ CV *cv)	182	coro_clone_padlist (CV *cv)
163	{	183	{
164	AV *padlist = CvPADLIST (cv);	184	AV *padlist = CvPADLIST (cv);
165	AV *newpadlist, *newpad;	185	AV *newpadlist, *newpad;
166		186
167	newpadlist = newAV ();	187	newpadlist = newAV ();
168	AvREAL_off (newpadlist);	188	AvREAL_off (newpadlist);
169	#if PERL_VERSION < 9	189	#if PERL_VERSION_ATLEAST (5,9,0)
		190	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		191	#else
170	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	192	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171	#else
172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173	#endif	193	#endif
174	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	194	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175	--AvFILLp (padlist);	195	--AvFILLp (padlist);
176		196
177	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	197	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
179		199
180	return newpadlist;	200	return newpadlist;
181	}	201	}
182		202
183	static void	203	static void
184	free_padlist (pTHX_ AV *padlist)	204	free_padlist (AV *padlist)
185	{	205	{
186	/* may be during global destruction */	206	/* may be during global destruction */
187	if (SvREFCNT (padlist))	207	if (SvREFCNT (padlist))
188	{	208	{
189	I32 i = AvFILLp (padlist);	209	I32 i = AvFILLp (padlist);
…		…
210	AV *padlist;	230	AV *padlist;
211	AV *av = (AV *)mg->mg_obj;	231	AV *av = (AV *)mg->mg_obj;
212		232
213	/* casting is fun. */	233	/* casting is fun. */
214	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	234	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
215	free_padlist (aTHX_ padlist);	235	free_padlist (padlist);
216		236
217	SvREFCNT_dec (av);	237	SvREFCNT_dec (av);
218		238
219	return 0;	239	return 0;
220	}	240	}
221		241
222	#define PERL_MAGIC_coro PERL_MAGIC_ext	242	#define PERL_MAGIC_coro PERL_MAGIC_ext
223		243
224	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	244	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
225		245
		246	#define CORO_MAGIC(cv) \
		247	SvMAGIC (cv) \
		248	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		249	? SvMAGIC (cv) \
		250	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		251	: 0
		252
226	/* the next two functions merely cache the padlists */	253	/* the next two functions merely cache the padlists */
227	static void	254	static void
228	get_padlist (pTHX_ CV *cv)	255	get_padlist (CV *cv)
229	{	256	{
230	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	257	MAGIC *mg = CORO_MAGIC (cv);
		258	AV *av;
231		259
232	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	260	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
233	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	261	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
234	else	262	else
235	{	263	{
236	#if 0	264	#if 0
237	/* this should work - but it doesn't :( */	265	/* this is probably cleaner, but also slower? */
238	CV *cp = Perl_cv_clone (aTHX_ cv);	266	CV *cp = Perl_cv_clone (cv);
239	CvPADLIST (cv) = CvPADLIST (cp);	267	CvPADLIST (cv) = CvPADLIST (cp);
240	CvPADLIST (cp) = 0;	268	CvPADLIST (cp) = 0;
241	SvREFCNT_dec (cp);	269	SvREFCNT_dec (cp);
242	#else	270	#else
243	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	271	CvPADLIST (cv) = coro_clone_padlist (cv);
244	#endif	272	#endif
245	}	273	}
246	}	274	}
247		275
248	static void	276	static void
249	put_padlist (pTHX_ CV *cv)	277	put_padlist (CV *cv)
250	{	278	{
251	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	279	MAGIC *mg = CORO_MAGIC (cv);
		280	AV *av;
252		281
253	if (!mg)	282	if (!mg)
254	{	283	{
255	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	284	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
256	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	285	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
257	mg->mg_virtual = &vtbl_coro;	286	mg->mg_virtual = &vtbl_coro;
258	mg->mg_obj = (SV *)newAV ();	287	mg->mg_obj = (SV *)newAV ();
259	}	288	}
260		289
261	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	290	av = (AV *)mg->mg_obj;
		291
		292	if (AvFILLp (av) >= AvMAX (av))
		293	av_extend (av, AvMAX (av) + 1);
		294
		295	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
262	}	296	}
263		297
264	#define SB do {	298	#define SB do {
265	#define SE } while (0)	299	#define SE } while (0)
266		300
267	#define LOAD(state) load_state(aTHX_ (state));
268	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
269
270	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	301	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
271		302
272	static void	303	static void
273	load_state(pTHX_ Coro__State c)	304	load_perl (Coro__State c)
274	{	305	{
275	PL_dowarn = c->dowarn;	306	#define VAR(name,type) PL_ ## name = c->name;
276	PL_in_eval = c->in_eval;	307	# include "state.h"
277		308	#undef VAR
278	PL_curstackinfo = c->curstackinfo;
279	PL_curstack = c->curstack;
280	PL_mainstack = c->mainstack;
281	PL_stack_sp = c->stack_sp;
282	PL_op = c->op;
283	PL_curpad = c->curpad;
284	PL_comppad = c->comppad;
285	PL_compcv = c->compcv;
286	PL_stack_base = c->stack_base;
287	PL_stack_max = c->stack_max;
288	PL_tmps_stack = c->tmps_stack;
289	PL_tmps_floor = c->tmps_floor;
290	PL_tmps_ix = c->tmps_ix;
291	PL_tmps_max = c->tmps_max;
292	PL_markstack = c->markstack;
293	PL_markstack_ptr = c->markstack_ptr;
294	PL_markstack_max = c->markstack_max;
295	PL_scopestack = c->scopestack;
296	PL_scopestack_ix = c->scopestack_ix;
297	PL_scopestack_max = c->scopestack_max;
298	PL_savestack = c->savestack;
299	PL_savestack_ix = c->savestack_ix;
300	PL_savestack_max = c->savestack_max;
301	#if PERL_VERSION < 9
302	PL_retstack = c->retstack;
303	PL_retstack_ix = c->retstack_ix;
304	PL_retstack_max = c->retstack_max;
305	#endif
306	PL_curpm = c->curpm;
307	PL_curcop = c->curcop;
308		309
309	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	310	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
310	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	311	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
311	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	312	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		313	if (c->irssv)
		314	{
		315	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		316	SvREFCNT_dec (c->irssv);
		317	else
		318	{
		319	REPLACE_SV (PL_rs, c->irssv);
		320	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		321	sv_setsv (c->irssv_sv, PL_rs);
		322	}
		323	}
312		324
313	{	325	{
314	dSP;	326	dSP;
315	CV *cv;	327	CV *cv;
316		328
317	/* now do the ugly restore mess */	329	/* now do the ugly restore mess */
318	while ((cv = (CV *)POPs))	330	while ((cv = (CV *)POPs))
319	{	331	{
320	AV *padlist = (AV *)POPs;
321
322	if (padlist)
323	{
324	put_padlist (aTHX_ cv); /* mark this padlist as available */	332	put_padlist (cv); /* mark this padlist as available */
325	CvPADLIST(cv) = padlist;	333	CvDEPTH (cv) = PTR2IV (POPs);
326	}	334	CvPADLIST (cv) = (AV *)POPs;
327
328	++CvDEPTH(cv);
329	}	335	}
330		336
331	PUTBACK;	337	PUTBACK;
332	}	338	}
333	}	339	}
334		340
335	static void	341	static void
336	save_state(pTHX_ Coro__State c, int flags)	342	save_perl (Coro__State c)
337	{	343	{
338	{	344	{
339	dSP;	345	dSP;
340	I32 cxix = cxstack_ix;	346	I32 cxix = cxstack_ix;
341	PERL_CONTEXT *ccstk = cxstack;	347	PERL_CONTEXT *ccstk = cxstack;
…		…
352	{	358	{
353	while (cxix >= 0)	359	while (cxix >= 0)
354	{	360	{
355	PERL_CONTEXT *cx = &ccstk[cxix--];	361	PERL_CONTEXT *cx = &ccstk[cxix--];
356		362
357	if (CxTYPE(cx) == CXt_SUB)	363	if (CxTYPE (cx) == CXt_SUB)
358	{	364	{
359	CV *cv = cx->blk_sub.cv;	365	CV *cv = cx->blk_sub.cv;
		366
360	if (CvDEPTH(cv))	367	if (CvDEPTH (cv))
361	{	368	{
362	EXTEND (SP, CvDEPTH(cv)*2);	369	EXTEND (SP, 3);
363		370
364	while (--CvDEPTH(cv))
365	{
366	/* this tells the restore code to increment CvDEPTH */
367	PUSHs (Nullsv);
368	PUSHs ((SV *)cv);
369	}
370
371	PUSHs ((SV *)CvPADLIST(cv));	371	PUSHs ((SV *)CvPADLIST (cv));
		372	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
372	PUSHs ((SV *)cv);	373	PUSHs ((SV *)cv);
373		374
		375	CvDEPTH (cv) = 0;
374	get_padlist (aTHX_ cv);	376	get_padlist (cv);
375	}	377	}
376	}	378	}
377	#ifdef CXt_FORMAT	379	#ifdef CXt_FORMAT
378	else if (CxTYPE(cx) == CXt_FORMAT)	380	else if (CxTYPE (cx) == CXt_FORMAT)
379	{	381	{
380	/* I never used formats, so how should I know how these are implemented? */	382	/* I never used formats, so how should I know how these are implemented? */
381	/* my bold guess is as a simple, plain sub... */	383	/* my bold guess is as a simple, plain sub... */
382	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	384	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383	}	385	}
…		…
393	}	395	}
394		396
395	PUTBACK;	397	PUTBACK;
396	}	398	}
397		399
398	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	400	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
399	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	401	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
400	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	402	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		403	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
401		404
402	c->dowarn = PL_dowarn;	405	#define VAR(name,type)c->name = PL_ ## name;
403	c->in_eval = PL_in_eval;	406	# include "state.h"
404		407	#undef VAR
405	c->curstackinfo = PL_curstackinfo;
406	c->curstack = PL_curstack;
407	c->mainstack = PL_mainstack;
408	c->stack_sp = PL_stack_sp;
409	c->op = PL_op;
410	c->curpad = PL_curpad;
411	c->comppad = PL_comppad;
412	c->compcv = PL_compcv;
413	c->stack_base = PL_stack_base;
414	c->stack_max = PL_stack_max;
415	c->tmps_stack = PL_tmps_stack;
416	c->tmps_floor = PL_tmps_floor;
417	c->tmps_ix = PL_tmps_ix;
418	c->tmps_max = PL_tmps_max;
419	c->markstack = PL_markstack;
420	c->markstack_ptr = PL_markstack_ptr;
421	c->markstack_max = PL_markstack_max;
422	c->scopestack = PL_scopestack;
423	c->scopestack_ix = PL_scopestack_ix;
424	c->scopestack_max = PL_scopestack_max;
425	c->savestack = PL_savestack;
426	c->savestack_ix = PL_savestack_ix;
427	c->savestack_max = PL_savestack_max;
428	#if PERL_VERSION < 9
429	c->retstack = PL_retstack;
430	c->retstack_ix = PL_retstack_ix;
431	c->retstack_max = PL_retstack_max;
432	#endif
433	c->curpm = PL_curpm;
434	c->curcop = PL_curcop;
435	}	408	}
436		409
437	/*	410	/*
438	* allocate various perl stacks. This is an exact copy	411	* allocate various perl stacks. This is an exact copy
439	* of perl.c:init_stacks, except that it uses less memory	412	* of perl.c:init_stacks, except that it uses less memory
440	* on the (sometimes correct) assumption that coroutines do	413	* on the (sometimes correct) assumption that coroutines do
441	* not usually need a lot of stackspace.	414	* not usually need a lot of stackspace.
442	*/	415	*/
443	static void	416	static void
444	coro_init_stacks (pTHX)	417	coro_init_stacks ()
445	{	418	{
446	LOCK;
447
448	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	419	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
449	PL_curstackinfo->si_type = PERLSI_MAIN;	420	PL_curstackinfo->si_type = PERLSI_MAIN;
450	PL_curstack = PL_curstackinfo->si_stack;	421	PL_curstack = PL_curstackinfo->si_stack;
451	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	422	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
452		423
453	PL_stack_base = AvARRAY(PL_curstack);	424	PL_stack_base = AvARRAY(PL_curstack);
454	PL_stack_sp = PL_stack_base;	425	PL_stack_sp = PL_stack_base;
455	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	426	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
456		427
457	New(50,PL_tmps_stack,96,SV*);	428	New(50,PL_tmps_stack,128,SV*);
458	PL_tmps_floor = -1;	429	PL_tmps_floor = -1;
459	PL_tmps_ix = -1;	430	PL_tmps_ix = -1;
460	PL_tmps_max = 96;	431	PL_tmps_max = 128;
461		432
462	New(54,PL_markstack,16,I32);	433	New(54,PL_markstack,32,I32);
463	PL_markstack_ptr = PL_markstack;	434	PL_markstack_ptr = PL_markstack;
464	PL_markstack_max = PL_markstack + 16;	435	PL_markstack_max = PL_markstack + 32;
465		436
466	#ifdef SET_MARK_OFFSET	437	#ifdef SET_MARK_OFFSET
467	SET_MARK_OFFSET;	438	SET_MARK_OFFSET;
468	#endif	439	#endif
469		440
470	New(54,PL_scopestack,16,I32);	441	New(54,PL_scopestack,32,I32);
471	PL_scopestack_ix = 0;	442	PL_scopestack_ix = 0;
472	PL_scopestack_max = 16;	443	PL_scopestack_max = 32;
473		444
474	New(54,PL_savestack,96,ANY);	445	New(54,PL_savestack,64,ANY);
475	PL_savestack_ix = 0;	446	PL_savestack_ix = 0;
476	PL_savestack_max = 96;	447	PL_savestack_max = 64;
477		448
478	#if PERL_VERSION < 9	449	#if !PERL_VERSION_ATLEAST (5,9,0)
479	New(54,PL_retstack,8,OP*);	450	New(54,PL_retstack,16,OP*);
480	PL_retstack_ix = 0;	451	PL_retstack_ix = 0;
481	PL_retstack_max = 8;	452	PL_retstack_max = 16;
482	#endif	453	#endif
483
484	UNLOCK;
485	}	454	}
486		455
487	/*	456	/*
488	* destroy the stacks, the callchain etc...	457	* destroy the stacks, the callchain etc...
489	*/	458	*/
490	static void	459	static void
491	destroy_stacks(pTHX)	460	coro_destroy_stacks ()
492	{	461	{
493	if (!IN_DESTRUCT)	462	if (!IN_DESTRUCT)
494	{	463	{
495	/* is this ugly, I ask? */	464	/* is this ugly, I ask? */
496	LEAVE_SCOPE (0);	465	LEAVE_SCOPE (0);
…		…
527		496
528	Safefree (PL_tmps_stack);	497	Safefree (PL_tmps_stack);
529	Safefree (PL_markstack);	498	Safefree (PL_markstack);
530	Safefree (PL_scopestack);	499	Safefree (PL_scopestack);
531	Safefree (PL_savestack);	500	Safefree (PL_savestack);
532	#if PERL_VERSION < 9	501	#if !PERL_VERSION_ATLEAST (5,9,0)
533	Safefree (PL_retstack);	502	Safefree (PL_retstack);
534	#endif	503	#endif
535	}	504	}
536		505
537	static void	506	static void
538	setup_coro (struct coro *coro)	507	setup_coro (struct coro *coro)
539	{	508	{
540	/*	509	/*
541	* emulate part of the perl startup here.	510	* emulate part of the perl startup here.
542	*/	511	*/
543	dTHX;
544	dSP;
545	UNOP myop;
546	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
547		512
548	coro_init_stacks (aTHX);	513	coro_init_stacks ();
549	/*PL_curcop = 0;*/	514
550	/*PL_in_eval = PL_in_eval;*/ /* inherit */	515	PL_curcop = &PL_compiling;
		516	PL_in_eval = EVAL_NULL;
		517	PL_curpm = 0;
		518	PL_localizing = 0;
		519	PL_dirty = 0;
		520	PL_restartop = 0;
		521
		522	{
		523	dSP;
		524	LOGOP myop;
		525
551	SvREFCNT_dec (GvAV (PL_defgv));	526	SvREFCNT_dec (GvAV (PL_defgv));
552	GvAV (PL_defgv) = coro->args; coro->args = 0;	527	GvAV (PL_defgv) = coro->args; coro->args = 0;
553		528
554	SPAGAIN;
555
556	Zero (&myop, 1, UNOP);	529	Zero (&myop, 1, LOGOP);
557	myop.op_next = Nullop;	530	myop.op_next = Nullop;
558	myop.op_flags = OPf_WANT_VOID;	531	myop.op_flags = OPf_WANT_VOID;
559		532
		533	PUSHMARK (SP);
		534	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		535	PUTBACK;
560	PL_op = (OP *)&myop;	536	PL_op = (OP *)&myop;
561
562	PUSHMARK(SP);
563	XPUSHs (sub_init);
564	PUTBACK;
565	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	537	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
566	SPAGAIN;	538	SPAGAIN;
		539	}
567		540
568	ENTER; /* necessary e.g. for dounwind */	541	ENTER; /* necessary e.g. for dounwind */
569	}	542	}
570		543
571	static void	544	static void
…		…
576	SvREFCNT_dec (coro_mortal);	549	SvREFCNT_dec (coro_mortal);
577	coro_mortal = 0;	550	coro_mortal = 0;
578	}	551	}
579	}	552	}
580		553
		554	/* inject a fake call to Coro::State::_cctx_init into the execution */
		555	static void NOINLINE
		556	prepare_cctx (coro_cctx *cctx)
		557	{
		558	dSP;
		559	LOGOP myop;
		560
		561	Zero (&myop, 1, LOGOP);
		562	myop.op_next = PL_op;
		563	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		564
		565	PUSHMARK (SP);
		566	EXTEND (SP, 2);
		567	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		568	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		569	PUTBACK;
		570	PL_op = (OP *)&myop;
		571	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		572	SPAGAIN;
		573	}
		574
581	static void	575	static void
582	coro_run (void *arg)	576	coro_run (void *arg)
583	{	577	{
		578	/* coro_run is the alternative tail of transfer(), so unlock here. */
		579	UNLOCK;
		580
584	/*	581	/*
585	* this is a _very_ stripped down perl interpreter ;)	582	* this is a _very_ stripped down perl interpreter ;)
586	*/	583	*/
587	dTHX;
588	int ret;
589
590	UNLOCK;
591
592	PL_top_env = &PL_start_env;	584	PL_top_env = &PL_start_env;
593		585
594	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));	586	/* inject call to cctx_init */
595	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));	587	prepare_cctx ((coro_cctx *)arg);
596
597	/* continue at cctx_init, without entersub */
598	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
599		588
600	/* somebody will hit me for both perl_run and PL_restartop */	589	/* somebody will hit me for both perl_run and PL_restartop */
601	ret = perl_run (aTHX_ PERL_GET_CONTEXT);	590	PL_restartop = PL_op;
602	printf ("ret %d\n", ret);//D	591	perl_run (PL_curinterp);
603		592
604	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);	593	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
605	abort ();	594	abort ();
606	}	595	}
607		596
608	static coro_stack *	597	static coro_cctx *
609	stack_new ()	598	cctx_new ()
610	{	599	{
611	coro_stack *stack;	600	coro_cctx *cctx;
612		601
		602	++cctx_count;
		603
613	New (0, stack, 1, coro_stack);	604	Newz (0, cctx, 1, coro_cctx);
614		605
615	#if HAVE_MMAP	606	#if HAVE_MMAP
616		607
617	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	608	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
618	/* mmap suppsedly does allocate-on-write for us */	609	/* mmap supposedly does allocate-on-write for us */
619	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	610	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
620		611
621	if (stack->sptr == (void *)-1)	612	if (cctx->sptr == (void *)-1)
622	{	613	{
623	perror ("FATAL: unable to mmap stack for coroutine");	614	perror ("FATAL: unable to mmap stack for coroutine");
624	_exit (EXIT_FAILURE);	615	_exit (EXIT_FAILURE);
625	}	616	}
626		617
627	# if STACKGUARD	618	# if STACKGUARD
628	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	619	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
629	# endif	620	# endif
630		621
631	#else	622	#else
632		623
633	stack->ssize = STACKSIZE * (long)sizeof (long);	624	cctx->ssize = STACKSIZE * (long)sizeof (long);
634	New (0, stack->sptr, STACKSIZE, long);	625	New (0, cctx->sptr, STACKSIZE, long);
635		626
636	if (!stack->sptr)	627	if (!cctx->sptr)
637	{	628	{
638	perror (stderr, "FATAL: unable to malloc stack for coroutine");	629	perror ("FATAL: unable to malloc stack for coroutine");
639	_exit (EXIT_FAILURE);	630	_exit (EXIT_FAILURE);
640	}	631	}
641		632
642	#endif	633	#endif
643		634
		635	#if USE_VALGRIND
		636	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		637	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		638	cctx->ssize + (char *)cctx->sptr
		639	);
		640	#endif
		641
644	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	642	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
645		643
646	return stack;	644	return cctx;
647	}	645	}
648		646
649	static void	647	static void
650	stack_free (coro_stack *stack)	648	cctx_destroy (coro_cctx *cctx)
651	{	649	{
652	if (!stack || stack == main_stack)	650	if (!cctx)
653	return;	651	return;
654		652
		653	--cctx_count;
		654
		655	#if USE_VALGRIND
		656	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		657	#endif
		658
655	#if HAVE_MMAP	659	#if HAVE_MMAP
656	munmap (stack->sptr, stack->ssize);	660	munmap (cctx->sptr, cctx->ssize);
657	#else	661	#else
658	Safefree (stack->sptr);	662	Safefree (cctx->sptr);
659	#endif	663	#endif
660		664
661	Safefree (stack);	665	Safefree (cctx);
662	}	666	}
663		667
664	static coro_stack *stack_first;
665
666	static coro_stack *	668	static coro_cctx *
667	stack_get ()	669	cctx_get ()
668	{	670	{
669	coro_stack *stack;	671	coro_cctx *cctx;
670		672
671	if (stack_first)	673	if (cctx_first)
672	{	674	{
673	stack = stack_first;	675	cctx = cctx_first;
674	stack_first = stack->next;	676	cctx_first = cctx->next;
		677	--cctx_idle;
675	}	678	}
676	else	679	else
677	{	680	{
678	stack = stack_new ();	681	cctx = cctx_new ();
679	PL_op = PL_op->op_next;	682	PL_op = PL_op->op_next;
680	}	683	}
681		684
682	return stack;	685	return cctx;
683	}	686	}
684		687
685	static void	688	static void
686	stack_put (coro_stack *stack)	689	cctx_put (coro_cctx *cctx)
687	{	690	{
688	stack->next = stack_first;	691	/* free another cctx if overlimit */
689	stack_first = stack;	692	if (cctx_idle >= MAX_IDLE_CCTX)
		693	{
		694	coro_cctx *first = cctx_first;
		695	cctx_first = first->next;
		696	--cctx_idle;
		697
		698	assert (!first->inuse);
		699	cctx_destroy (first);
		700	}
		701
		702	++cctx_idle;
		703	cctx->next = cctx_first;
		704	cctx_first = cctx;
690	}	705	}
691		706
692	/* never call directly, always through the coro_state_transfer global variable */	707	/* never call directly, always through the coro_state_transfer global variable */
693	static void	708	static void NOINLINE
694	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	709	transfer (struct coro *prev, struct coro *next)
695	{	710	{
696	dSTACKLEVEL;	711	dSTACKLEVEL;
697		712
698	/* sometimes transfer is only called to set idle_sp */	713	/* sometimes transfer is only called to set idle_sp */
699	if (flags == TRANSFER_SET_STACKLEVEL)	714	if (!next)
		715	{
700	((coro_stack *)prev)->idle_sp = STACKLEVEL;	716	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		717	assert (((coro_cctx *)prev)->top_env = PL_top_env); /* just for the side effetc when assert is enabled */
		718	}
701	else if (prev != next)	719	else if (prev != next)
702	{	720	{
703	coro_stack *prev__stack;	721	coro_cctx *prev__cctx;
		722
		723	if (prev->flags & CF_NEW)
		724	{
		725	/* create a new empty context */
		726	Newz (0, prev->cctx, 1, coro_cctx);
		727	prev->cctx->inuse = 1;
		728	prev->flags &= ~CF_NEW;
		729	prev->flags |= CF_RUNNING;
		730	}
		731
		732	/*TODO: must not croak here */
		733	if (!prev->flags & CF_RUNNING)
		734	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		735
		736	if (next->flags & CF_RUNNING)
		737	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		738
		739	prev->flags &= ~CF_RUNNING;
		740	next->flags |= CF_RUNNING;
704		741
705	LOCK;	742	LOCK;
706		743
707	if (next->mainstack)	744	if (next->flags & CF_NEW)
708	{	745	{
709	/* coroutine already started */	746	/* need to start coroutine */
710	SAVE (prev, flags);	747	next->flags &= ~CF_NEW;
711	LOAD (next);	748	/* first get rid of the old state */
		749	save_perl (prev);
		750	/* setup coroutine call */
		751	setup_coro (next);
		752	/* need a new stack */
		753	assert (!next->cctx);
712	}	754	}
713	else	755	else
714	{	756	{
715	/* need to start coroutine */	757	/* coroutine already started */
716	/* first get rid of the old state */	758	save_perl (prev);
717	SAVE (prev, -1);	759	load_perl (next);
718	/* setup coroutine call */
719	setup_coro (next);
720	/* need a stack */
721	next->stack = 0;
722	}	760	}
723		761
724	prev__stack = prev->stack;	762	prev__cctx = prev->cctx;
725		763
726	/* possibly "free" the stack */	764	/* possibly "free" the cctx */
727	if (prev__stack->idle_sp == STACKLEVEL)	765	if (prev__cctx->idle_sp == STACKLEVEL)
728	{	766	{
729	stack_put (prev__stack);	767	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		768	assert (PL_top_env == prev__cctx->top_env);
		769
730	prev->stack = 0;	770	prev->cctx = 0;
		771
		772	cctx_put (prev__cctx);
		773	prev__cctx->inuse = 0;
731	}	774	}
732		775
733	if (!next->stack)	776	if (!next->cctx)
734	next->stack = stack_get ();
735
736	if (prev__stack != next->stack)
737	{	777	{
		778	next->cctx = cctx_get ();
		779	assert (!next->cctx->inuse);
		780	next->cctx->inuse = 1;
		781	}
		782
		783	if (prev__cctx != next->cctx)
		784	{
738	prev__stack->top_env = PL_top_env;	785	prev__cctx->top_env = PL_top_env;
739	PL_top_env = next->stack->top_env;	786	PL_top_env = next->cctx->top_env;
740	printf ("stacksw %p %p\n", prev__stack->idle_sp, next->stack->idle_sp);//D
741	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	787	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
742	}	788	}
743		789
744	free_coro_mortal ();	790	free_coro_mortal ();
745		791
746	UNLOCK;	792	UNLOCK;
747	}	793	}
748	}	794	}
749		795
750	/* use this function pointer to call the above function */
751	/* this is done to increase chances of the compiler not inlining the call */
752	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
753	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
754
755	struct transfer_args	796	struct transfer_args
756	{	797	{
757	struct coro *prev, *next;	798	struct coro *prev, *next;
758	int flags;
759	};	799	};
760		800
761	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	801	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
762		802
763	static void	803	static void
764	coro_state_destroy (struct coro *coro)	804	coro_state_destroy (struct coro *coro)
765	{	805	{
766	if (coro->refcnt--)	806	if (coro->refcnt--)
767	return;	807	return;
768		808
769	if (coro->mainstack && coro->mainstack != main_mainstack)	809	if (coro->mainstack && coro->mainstack != main_mainstack)
770	{	810	{
771	struct coro temp;	811	struct coro temp;
		812	Zero (&temp, 1, struct coro);
		813	temp.save = CORO_SAVE_ALL;
772		814
773	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	815	if (coro->flags & CF_RUNNING)
774	LOAD (aTHX_ coro);	816	croak ("FATAL: tried to destroy currently running coroutine");
775		817
		818	save_perl (&temp);
		819	load_perl (coro);
		820
776	destroy_stacks (aTHX);	821	coro_destroy_stacks ();
777		822
778	LOAD ((&temp)); /* this will get rid of defsv etc.. */	823	load_perl (&temp); /* this will get rid of defsv etc.. */
779		824
780	coro->mainstack = 0;	825	coro->mainstack = 0;
781	}	826	}
782		827
783	stack_free (coro->stack);	828	cctx_destroy (coro->cctx);
784	SvREFCNT_dec (coro->args);	829	SvREFCNT_dec (coro->args);
785	Safefree (coro);	830	Safefree (coro);
786	}	831	}
787		832
788	static int	833	static int
789	coro_state_clear (SV *sv, MAGIC *mg)	834	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
790	{	835	{
791	struct coro *coro = (struct coro *)mg->mg_ptr;	836	struct coro *coro = (struct coro *)mg->mg_ptr;
792	mg->mg_ptr = 0;	837	mg->mg_ptr = 0;
793		838
794	coro_state_destroy (coro);	839	coro_state_destroy (coro);
795		840
796	return 0;	841	return 0;
797	}	842	}
798		843
799	static int	844	static int
800	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	845	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
801	{	846	{
802	struct coro *coro = (struct coro *)mg->mg_ptr;	847	struct coro *coro = (struct coro *)mg->mg_ptr;
803		848
804	++coro->refcnt;	849	++coro->refcnt;
805		850
806	return 0;	851	return 0;
807	}	852	}
808		853
809	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	854	static MGVTBL coro_state_vtbl = {
		855	0, 0, 0, 0,
		856	coro_state_clear,
		857	0,
		858	#ifdef MGf_DUP
		859	coro_state_dup,
		860	#else
		861	# define MGf_DUP 0
		862	#endif
		863	};
810		864
811	static struct coro *	865	static struct coro *
812	SvSTATE (SV *coro)	866	SvSTATE (SV *coro)
813	{	867	{
814	HV *stash;	868	HV *stash;
…		…
829	assert (mg->mg_type == PERL_MAGIC_ext);	883	assert (mg->mg_type == PERL_MAGIC_ext);
830	return (struct coro *)mg->mg_ptr;	884	return (struct coro *)mg->mg_ptr;
831	}	885	}
832		886
833	static void	887	static void
834	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	888	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
835	{	889	{
836	ta->prev = SvSTATE (prev);	890	ta->prev = SvSTATE (prev_sv);
837	ta->next = SvSTATE (next);	891	ta->next = SvSTATE (next_sv);
838	ta->flags = flags;
839	}	892	}
840		893
841	static void	894	static void
842	api_transfer (SV *prev, SV *next, int flags)	895	api_transfer (SV *prev_sv, SV *next_sv)
843	{	896	{
844	dTHX;
845	struct transfer_args ta;	897	struct transfer_args ta;
846		898
847	prepare_transfer (aTHX_ &ta, prev, next, flags);	899	prepare_transfer (&ta, prev_sv, next_sv);
848	TRANSFER (ta);	900	TRANSFER (ta);
		901	}
		902
		903	static int
		904	api_save (SV *coro_sv, int new_save)
		905	{
		906	struct coro *coro = SvSTATE (coro_sv);
		907	int old_save = coro->save;
		908
		909	if (new_save >= 0)
		910	coro->save = new_save;
		911
		912	return old_save;
849	}	913	}
850		914
851	/** Coro ********************************************************************/	915	/** Coro ********************************************************************/
852		916
853	#define PRIO_MAX 3	917	#define PRIO_MAX 3
…		…
856	#define PRIO_LOW -1	920	#define PRIO_LOW -1
857	#define PRIO_IDLE -3	921	#define PRIO_IDLE -3
858	#define PRIO_MIN -4	922	#define PRIO_MIN -4
859		923
860	/* for Coro.pm */	924	/* for Coro.pm */
861	static GV *coro_current, *coro_idle;	925	static SV *coro_current;
862	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	926	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863	static int coro_nready;	927	static int coro_nready;
864		928
865	static void	929	static void
866	coro_enq (pTHX_ SV *sv)	930	coro_enq (SV *coro_sv)
867	{	931	{
868	int prio;
869
870	if (SvTYPE (sv) != SVt_PVHV)
871	croak ("Coro::ready tried to enqueue something that is not a coroutine");
872
873	prio = SvSTATE (sv)->prio;
874
875	av_push (coro_ready [prio - PRIO_MIN], sv);	932	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
876	coro_nready++;	933	coro_nready++;
877	}	934	}
878		935
879	static SV *	936	static SV *
880	coro_deq (pTHX_ int min_prio)	937	coro_deq (int min_prio)
881	{	938	{
882	int prio = PRIO_MAX - PRIO_MIN;	939	int prio = PRIO_MAX - PRIO_MIN;
883		940
884	min_prio -= PRIO_MIN;	941	min_prio -= PRIO_MIN;
885	if (min_prio < 0)	942	if (min_prio < 0)
…		…
893	}	950	}
894		951
895	return 0;	952	return 0;
896	}	953	}
897		954
898	static void	955	static int
899	api_ready (SV *coro)	956	api_ready (SV *coro_sv)
900	{	957	{
901	dTHX;	958	struct coro *coro;
902		959
903	if (SvROK (coro))	960	if (SvROK (coro_sv))
904	coro = SvRV (coro);	961	coro_sv = SvRV (coro_sv);
		962
		963	coro = SvSTATE (coro_sv);
		964
		965	if (coro->flags & CF_READY)
		966	return 0;
		967
		968	#if 0 /* this is actually harmless */
		969	if (coro->flags & CF_RUNNING)
		970	croak ("Coro::ready called on currently running coroutine");
		971	#endif
		972
		973	coro->flags |= CF_READY;
905		974
906	LOCK;	975	LOCK;
907	coro_enq (aTHX_ SvREFCNT_inc (coro));	976	coro_enq (SvREFCNT_inc (coro_sv));
908	UNLOCK;	977	UNLOCK;
909	}
910		978
		979	return 1;
		980	}
		981
911	static void	982	static int
		983	api_is_ready (SV *coro_sv)
		984	{
		985	return !!SvSTATE (coro_sv)->flags & CF_READY;
		986	}
		987
		988	static void
912	prepare_schedule (aTHX_ struct transfer_args *ta)	989	prepare_schedule (struct transfer_args *ta)
913	{	990	{
914	SV *current, *prev, *next;	991	SV *prev, *next;
915
916	LOCK;
917
918	current = GvSV (coro_current);
919		992
920	for (;;)	993	for (;;)
921	{	994	{
922	LOCK;	995	LOCK;
923
924	next = coro_deq (aTHX_ PRIO_MIN);	996	next = coro_deq (PRIO_MIN);
		997	UNLOCK;
925		998
926	if (next)	999	if (next)
927	break;	1000	break;
928		1001
929	UNLOCK;
930
931	{	1002	{
932	dSP;	1003	dSP;
933		1004
934	ENTER;	1005	ENTER;
935	SAVETMPS;	1006	SAVETMPS;
936		1007
937	PUSHMARK (SP);	1008	PUSHMARK (SP);
938	PUTBACK;	1009	PUTBACK;
939	call_sv (GvSV (coro_idle), G_DISCARD);	1010	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
940		1011
941	FREETMPS;	1012	FREETMPS;
942	LEAVE;	1013	LEAVE;
943	}	1014	}
944	}	1015	}
945		1016
946	prev = SvRV (current);	1017	prev = SvRV (coro_current);
947	SvRV (current) = next;	1018	SvRV_set (coro_current, next);
948		1019
949	/* free this only after the transfer */	1020	/* free this only after the transfer */
		1021	LOCK;
950	free_coro_mortal ();	1022	free_coro_mortal ();
		1023	UNLOCK;
951	coro_mortal = prev;	1024	coro_mortal = prev;
952		1025
		1026	assert (!SvROK(prev));//D
		1027	assert (!SvROK(next));//D
		1028
953	ta->prev = SvSTATE (prev);	1029	ta->prev = SvSTATE (prev);
954	ta->next = SvSTATE (next);	1030	ta->next = SvSTATE (next);
955	ta->flags = TRANSFER_SAVE_ALL;
956		1031
957	UNLOCK;	1032	assert (ta->next->flags & CF_READY);
		1033	ta->next->flags &= ~CF_READY;
958	}	1034	}
959		1035
960	static void	1036	static void
961	prepare_cede (aTHX_ struct transfer_args *ta)	1037	prepare_cede (struct transfer_args *ta)
962	{	1038	{
963	LOCK;	1039	api_ready (coro_current);
964	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965	UNLOCK;
966		1040
967	prepare_schedule (ta);	1041	prepare_schedule (ta);
968	}	1042	}
969		1043
970	static void	1044	static void
971	api_schedule (void)	1045	api_schedule (void)
972	{	1046	{
973	dTHX;
974	struct transfer_args ta;	1047	struct transfer_args ta;
975		1048
976	prepare_schedule (&ta);	1049	prepare_schedule (&ta);
977	TRANSFER (ta);	1050	TRANSFER (ta);
978	}	1051	}
979		1052
980	static void	1053	static void
981	api_cede (void)	1054	api_cede (void)
982	{	1055	{
983	dTHX;
984	struct transfer_args ta;	1056	struct transfer_args ta;
985		1057
986	prepare_cede (&ta);	1058	prepare_cede (&ta);
987	TRANSFER (ta);	1059	TRANSFER (ta);
988	}	1060	}
…		…
998	#endif	1070	#endif
999	BOOT_PAGESIZE;	1071	BOOT_PAGESIZE;
1000		1072
1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1073	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002		1074
1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1075	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1076	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1077	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1078	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1079	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1006		1080
1007	main_mainstack = PL_mainstack;	1081	main_mainstack = PL_mainstack;
1008		1082
1009	coroapi.ver = CORO_API_VERSION;	1083	coroapi.ver = CORO_API_VERSION;
1010	coroapi.transfer = api_transfer;	1084	coroapi.transfer = api_transfer;
1011
1012	Newz (0, main_stack, 1, coro_stack);
1013	main_stack->idle_sp = (void *)-1;
1014		1085
1015	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1086	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1016	}	1087	}
1017		1088
1018	SV *	1089	SV *
…		…
1023	HV *hv;	1094	HV *hv;
1024	int i;	1095	int i;
1025		1096
1026	Newz (0, coro, 1, struct coro);	1097	Newz (0, coro, 1, struct coro);
1027	coro->args = newAV ();	1098	coro->args = newAV ();
		1099	coro->save = CORO_SAVE_ALL;
		1100	coro->flags = CF_NEW;
1028		1101
1029	hv = newHV ();	1102	hv = newHV ();
1030	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1103	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1031	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1104	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1032		1105
1033	for (i = 1; i < items; i++)	1106	for (i = 1; i < items; i++)
1034	av_push (coro->args, newSVsv (ST (i)));	1107	av_push (coro->args, newSVsv (ST (i)));
1035
1036	coro->stack = main_stack;
1037	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1038	/*coro->stack = 0;*/
1039	}	1108	}
1040	OUTPUT:	1109	OUTPUT:
		1110	RETVAL
		1111
		1112	int
		1113	save (SV *coro, int new_save = -1)
		1114	CODE:
		1115	RETVAL = api_save (coro, new_save);
		1116	OUTPUT:
1041	RETVAL	1117	RETVAL
1042		1118
1043	void	1119	void
1044	_set_stacklevel (...)	1120	_set_stacklevel (...)
1045	ALIAS:	1121	ALIAS:
1046	Coro::State::transfer = 1	1122	Coro::State::transfer = 1
1047	Coro::schedule = 2	1123	Coro::schedule = 2
1048	Coro::cede = 3	1124	Coro::cede = 3
1049	Coro::Cont::yield = 4
1050	CODE:	1125	CODE:
1051	{	1126	{
1052	struct transfer_args ta;	1127	struct transfer_args ta;
1053		1128
1054	switch (ix)	1129	switch (ix)
1055	{	1130	{
1056	case 0:	1131	case 0:
1057	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1132	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1058	ta.next = 0;	1133	ta.next = 0;
1059	ta.flags = TRANSFER_SET_STACKLEVEL;
1060	break;	1134	break;
1061		1135
1062	case 1:	1136	case 1:
1063	if (items != 3)	1137	if (items != 2)
1064	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1138	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1065		1139
1066	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1140	prepare_transfer (&ta, ST (0), ST (1));
1067	break;	1141	break;
1068		1142
1069	case 2:	1143	case 2:
1070	prepare_schedule (&ta);	1144	prepare_schedule (&ta);
1071	break;	1145	break;
1072		1146
1073	case 3:	1147	case 3:
1074	prepare_cede (&ta);	1148	prepare_cede (&ta);
1075	break;	1149	break;
1076
1077	case 4:
1078	{
1079	SV *yieldstack;
1080	SV *sv;
1081	AV *defav = GvAV (PL_defgv);
1082
1083	yieldstack = *hv_fetch (
1084	(HV *)SvRV (GvSV (coro_current)),
1085	"yieldstack", sizeof ("yieldstack") - 1,
1086	0
1087	);
1088
1089	/* set up @_ -- ugly */
1090	av_clear (defav);
1091	av_fill (defav, items - 1);
1092	while (items--)
1093	av_store (defav, items, SvREFCNT_inc (ST(items)));
1094
1095	sv = av_pop ((AV *)SvRV (yieldstack));
1096	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1097	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1098	ta.flags = 0;
1099	SvREFCNT_dec (sv);
1100	}
1101	break;
1102
1103	}	1150	}
1104		1151
1105	TRANSFER (ta);	1152	TRANSFER (ta);
1106	}	1153	}
1107		1154
…		…
1114	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);	1161	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1115		1162
1116	++coro_src->refcnt;	1163	++coro_src->refcnt;
1117	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;	1164	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1118	}	1165	}
1119
1120	void
1121	_nonlocal_goto (IV nextop)
1122	CODE:
1123	/* uuh, somebody will kill me again for this */
1124	PL_op->op_next = INT2PTR (OP *, nextop);
1125		1166
1126	void	1167	void
1127	_exit (code)	1168	_exit (code)
1128	int code	1169	int code
1129	PROTOTYPE: $	1170	PROTOTYPE: $
1130	CODE:	1171	CODE:
1131	_exit (code);	1172	_exit (code);
1132		1173
		1174	int
		1175	cctx_count ()
		1176	CODE:
		1177	RETVAL = cctx_count;
		1178	OUTPUT:
		1179	RETVAL
		1180
		1181	int
		1182	cctx_idle ()
		1183	CODE:
		1184	RETVAL = cctx_idle;
		1185	OUTPUT:
		1186	RETVAL
		1187
1133	MODULE = Coro::State PACKAGE = Coro	1188	MODULE = Coro::State PACKAGE = Coro
1134		1189
1135	BOOT:	1190	BOOT:
1136	{	1191	{
1137	int i;	1192	int i;
…		…
1143	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1198	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1144	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1199	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1145	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1200	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1146	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1201	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1147		1202
1148	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1203	coro_current = get_sv ("Coro::current", FALSE);
1149	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1204	SvREADONLY_on (coro_current);
1150		1205
1151	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1206	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1152	coro_ready[i] = newAV ();	1207	coro_ready[i] = newAV ();
1153		1208
1154	{	1209	{
1155	SV *sv = perl_get_sv("Coro::API", 1);	1210	SV *sv = perl_get_sv("Coro::API", 1);
1156		1211
1157	coroapi.schedule = api_schedule;	1212	coroapi.schedule = api_schedule;
		1213	coroapi.save = api_save;
1158	coroapi.cede = api_cede;	1214	coroapi.cede = api_cede;
1159	coroapi.ready = api_ready;	1215	coroapi.ready = api_ready;
		1216	coroapi.is_ready = api_is_ready;
1160	coroapi.nready = &coro_nready;	1217	coroapi.nready = &coro_nready;
1161	coroapi.current = coro_current;	1218	coroapi.current = coro_current;
1162		1219
1163	GCoroAPI = &coroapi;	1220	GCoroAPI = &coroapi;
1164	sv_setiv (sv, (IV)&coroapi);	1221	sv_setiv (sv, (IV)&coroapi);
1165	SvREADONLY_on (sv);	1222	SvREADONLY_on (sv);
1166	}	1223	}
1167	}	1224	}
		1225
		1226	void
		1227	_set_current (SV *current)
		1228	PROTOTYPE: $
		1229	CODE:
		1230	SvREFCNT_dec (SvRV (coro_current));
		1231	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1168		1232
1169	int	1233	int
1170	prio (Coro::State coro, int newprio = 0)	1234	prio (Coro::State coro, int newprio = 0)
1171	ALIAS:	1235	ALIAS:
1172	nice = 1	1236	nice = 1
…		…
1184		1248
1185	coro->prio = newprio;	1249	coro->prio = newprio;
1186	}	1250	}
1187	}	1251	}
1188		1252
1189	void	1253	SV *
1190	ready (SV *self)	1254	ready (SV *self)
1191	PROTOTYPE: $	1255	PROTOTYPE: $
1192	CODE:	1256	CODE:
1193	api_ready (self);	1257	RETVAL = boolSV (api_ready (self));
		1258	OUTPUT:
		1259	RETVAL
		1260
		1261	SV *
		1262	is_ready (SV *self)
		1263	PROTOTYPE: $
		1264	CODE:
		1265	RETVAL = boolSV (api_is_ready (self));
		1266	OUTPUT:
		1267	RETVAL
1194		1268
1195	int	1269	int
1196	nready (...)	1270	nready (...)
1197	PROTOTYPE:	1271	PROTOTYPE:
1198	CODE:	1272	CODE:
…		…
1204		1278
1205	SV *	1279	SV *
1206	_get_state ()	1280	_get_state ()
1207	CODE:	1281	CODE:
1208	{	1282	{
1209	struct {	1283	struct io_state *data;
1210	int errorno;
1211	int laststype;
1212	int laststatval;
1213	Stat_t statcache;
1214	} data;
1215		1284
		1285	RETVAL = newSV (sizeof (struct io_state));
		1286	data = (struct io_state *)SvPVX (RETVAL);
		1287	SvCUR_set (RETVAL, sizeof (struct io_state));
		1288	SvPOK_only (RETVAL);
		1289
1216	data.errorno = errno;	1290	data->errorno = errno;
1217	data.laststype = PL_laststype;	1291	data->laststype = PL_laststype;
1218	data.laststatval = PL_laststatval;	1292	data->laststatval = PL_laststatval;
1219	data.statcache = PL_statcache;	1293	data->statcache = PL_statcache;
1220
1221	RETVAL = newSVpvn ((char *)&data, sizeof data);
1222	}	1294	}
1223	OUTPUT:	1295	OUTPUT:
1224	RETVAL	1296	RETVAL
1225		1297
1226	void	1298	void
1227	_set_state (char *data_)	1299	_set_state (char *data_)
1228	PROTOTYPE: $	1300	PROTOTYPE: $
1229	CODE:	1301	CODE:
1230	{	1302	{
1231	struct {	1303	struct io_state *data = (void *)data_;
1232	int errorno;
1233	int laststype;
1234	int laststatval;
1235	Stat_t statcache;
1236	} *data = (void *)data_;
1237		1304
1238	errno = data->errorno;	1305	errno = data->errorno;
1239	PL_laststype = data->laststype;	1306	PL_laststype = data->laststype;
1240	PL_laststatval = data->laststatval;	1307	PL_laststatval = data->laststatval;
1241	PL_statcache = data->statcache;	1308	PL_statcache = data->statcache;
1242	}	1309	}
		1310

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines