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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.78 by root, Wed Nov 1 01:21:21 2006 UTC vs.
Revision 1.121 by root, Sat Dec 2 20:40:25 2006 UTC

1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	#if PERL_VERSION < 6	9	#if USE_VALGRIND
		10	# include <valgrind/valgrind.h>
		11	#endif
		12
		13	/* the maximum number of idle cctx that will be pooled */
		14	#define MAX_IDLE_CCTX 8
		15
		16	#define PERL_VERSION_ATLEAST(a,b,c) \
		17	(PERL_REVISION > (a) \
		18	|| (PERL_REVISION == (a) \
		19	&& (PERL_VERSION > (b) \
		20	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		21
		22	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	23	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	24	# define PL_ppaddr ppaddr
14	# endif	25	# endif
15	# ifndef call_sv	26	# ifndef call_sv
16	# define call_sv perl_call_sv	27	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	38	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	39	# define IS_PADCONST(v) 0
29	# endif	40	# endif
30	#endif	41	#endif
31		42
		43	#include <stdio.h>
32	#include <errno.h>	44	#include <errno.h>
33		45
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	47	# undef STACKGUARD
36	#endif	48	#endif
…		…
53	# ifndef PAGESIZE	65	# ifndef PAGESIZE
54	# define PAGESIZE pagesize	66	# define PAGESIZE pagesize
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)	67	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;	68	static long pagesize;
57	# else	69	# else
58	# define BOOT_PAGESIZE	70	# define BOOT_PAGESIZE (void)0
59	# endif	71	# endif
		72	#else
		73	# define PAGESIZE 0
		74	# define BOOT_PAGESIZE (void)0
60	#endif	75	#endif
61
62	#define SUB_INIT "Coro::State::initialize"
63	#define UCORO_STATE "_coro_state"
64		76
65	/* The next macro should declare a variable stacklevel that contains and approximation	77	/* The next macro should declare a variable stacklevel that contains and approximation
66	* to the current C stack pointer. Its property is that it changes with each call	78	* to the current C stack pointer. Its property is that it changes with each call
67	* and should be unique. */	79	* and should be unique. */
		80	#define dSTACKLEVEL int stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	81	#define STACKLEVEL ((void *)&stacklevel)
69		82
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	83	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		84
72	#define labs(l) ((l) >= 0 ? (l) : -(l))	85	#if __GNUC__ >= 3
		86	# define attribute(x) __attribute__(x)
		87	#else
		88	# define attribute(x)
		89	#endif
		90
		91	#define NOINLINE attribute ((noinline))
73		92
74	#include "CoroAPI.h"	93	#include "CoroAPI.h"
		94
		95	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
75		96
76	#ifdef USE_ITHREADS	97	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	98	static perl_mutex coro_mutex;
78	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	99	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	100	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
80	#else	101	#else
81	# define LOCK (void)0	102	# define LOCK (void)0
82	# define UNLOCK (void)0	103	# define UNLOCK (void)0
83	#endif	104	#endif
84		105
		106	struct io_state
		107	{
		108	int errorno;
		109	I32 laststype;
		110	int laststatval;
		111	Stat_t statcache;
		112	};
		113
85	static struct CoroAPI coroapi;	114	static struct CoroAPI coroapi;
86	static AV *main_mainstack; /* used to differentiate between $main and others */	115	static AV *main_mainstack; /* used to differentiate between $main and others */
87	static HV *coro_state_stash;	116	static HV *coro_state_stash, *coro_stash;
88	static SV *ucoro_state_sv;
89	static U32 ucoro_state_hash;
90	static SV *coro_mortal; /* will be freed after next transfer */	117	static SV *coro_mortal; /* will be freed after next transfer */
91		118
92	/* this is actually not only the c stack but also c registers etc... */	119	static struct coro_cctx *cctx_first;
		120	static int cctx_count, cctx_idle;
		121
		122	/* this is a structure representing a c-level coroutine */
93	typedef struct {	123	typedef struct coro_cctx {
94	int refcnt; /* pointer reference counter */	124	struct coro_cctx *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		125
98	coro_context cctx;	126	/* the stack */
99
100	void *sptr;	127	void *sptr;
101	long ssize; /* positive == mmap, otherwise malloc */	128	long ssize; /* positive == mmap, otherwise malloc */
102	} coro_stack;
103		129
		130	/* cpu state */
		131	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		132	JMPENV *top_env;
		133	coro_context cctx;
		134
		135	int inuse;
		136
		137	#if USE_VALGRIND
		138	int valgrind_id;
		139	#endif
		140	} coro_cctx;
		141
		142	enum {
		143	CF_RUNNING = 0x0001, /* coroutine is running */
		144	CF_READY = 0x0002, /* coroutine is ready */
		145	CF_NEW = 0x0004, /* ahs never been switched to */
		146	};
		147
		148	/* this is a structure representing a perl-level coroutine */
104	struct coro {	149	struct coro {
105	/* the top-level JMPENV for each coroutine, needed to catch dies. */	150	/* the c coroutine allocated to this perl coroutine, if any */
106	JMPENV start_env;	151	coro_cctx *cctx;
107		152
108	/* the optional C context */	153	/* data associated with this coroutine (initial args) */
109	coro_stack *stack;	154	AV *args;
110	void *cursp;
111	int gencnt;	155	int refcnt;
		156	int flags;
112		157
113	/* optionally saved, might be zero */	158	/* optionally saved, might be zero */
114	AV *defav;	159	AV *defav;
115	SV *defsv;	160	SV *defsv;
116	SV *errsv;	161	SV *errsv;
117		162
118	/* saved global state not related to stacks */	163	#define VAR(name,type) type name;
119	U8 dowarn;	164	# include "state.h"
120	I32 in_eval;	165	#undef VAR
121		166
122	/* the stacks and related info (callchain etc..) */	167	/* coro process data */
123	PERL_SI *curstackinfo;	168	int prio;
124	AV *curstack;
125	AV *mainstack;
126	SV **stack_sp;
127	OP *op;
128	SV **curpad;
129	AV *comppad;
130	CV *compcv;
131	SV **stack_base;
132	SV **stack_max;
133	SV **tmps_stack;
134	I32 tmps_floor;
135	I32 tmps_ix;
136	I32 tmps_max;
137	I32 *markstack;
138	I32 *markstack_ptr;
139	I32 *markstack_max;
140	I32 *scopestack;
141	I32 scopestack_ix;
142	I32 scopestack_max;
143	ANY *savestack;
144	I32 savestack_ix;
145	I32 savestack_max;
146	OP **retstack;
147	I32 retstack_ix;
148	I32 retstack_max;
149	PMOP *curpm;
150	COP *curcop;
151	JMPENV *top_env;
152
153	/* data associated with this coroutine (initial args) */
154	AV *args;
155	};	169	};
156		170
157	typedef struct coro *Coro__State;	171	typedef struct coro *Coro__State;
158	typedef struct coro *Coro__State_or_hashref;	172	typedef struct coro *Coro__State_or_hashref;
159		173
160	static AV *	174	static AV *
161	coro_clone_padlist (pTHX_ CV *cv)	175	coro_clone_padlist (CV *cv)
162	{	176	{
163	AV *padlist = CvPADLIST (cv);	177	AV *padlist = CvPADLIST (cv);
164	AV *newpadlist, *newpad;	178	AV *newpadlist, *newpad;
165		179
166	newpadlist = newAV ();	180	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	181	AvREAL_off (newpadlist);
		182	#if PERL_VERSION_ATLEAST (5,9,0)
		183	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		184	#else
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	185	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		186	#endif
169	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	187	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170	--AvFILLp (padlist);	188	--AvFILLp (padlist);
171		189
172	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	190	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
173	av_store (newpadlist, 1, (SV *)newpad);	191	av_store (newpadlist, 1, (SV *)newpad);
174		192
175	return newpadlist;	193	return newpadlist;
176	}	194	}
177		195
178	static void	196	static void
179	free_padlist (pTHX_ AV *padlist)	197	free_padlist (AV *padlist)
180	{	198	{
181	/* may be during global destruction */	199	/* may be during global destruction */
182	if (SvREFCNT (padlist))	200	if (SvREFCNT (padlist))
183	{	201	{
184	I32 i = AvFILLp (padlist);	202	I32 i = AvFILLp (padlist);
…		…
205	AV *padlist;	223	AV *padlist;
206	AV *av = (AV *)mg->mg_obj;	224	AV *av = (AV *)mg->mg_obj;
207		225
208	/* casting is fun. */	226	/* casting is fun. */
209	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	227	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
210	free_padlist (aTHX_ padlist);	228	free_padlist (padlist);
211		229
212	SvREFCNT_dec (av);	230	SvREFCNT_dec (av);
213		231
214	return 0;	232	return 0;
215	}	233	}
216		234
217	#define PERL_MAGIC_coro PERL_MAGIC_ext	235	#define PERL_MAGIC_coro PERL_MAGIC_ext
218		236
219	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	237	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
220		238
		239	#define CORO_MAGIC(cv) \
		240	SvMAGIC (cv) \
		241	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		242	? SvMAGIC (cv) \
		243	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		244	: 0
		245
221	/* the next two functions merely cache the padlists */	246	/* the next two functions merely cache the padlists */
222	static void	247	static void
223	get_padlist (pTHX_ CV *cv)	248	get_padlist (CV *cv)
224	{	249	{
225	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	250	MAGIC *mg = CORO_MAGIC (cv);
		251	AV *av;
226		252
227	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	253	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
228	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	254	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229	else	255	else
230	{	256	{
231	#if 0	257	#if 0
232	/* this should work - but it doesn't :( */	258	/* this is probably cleaner, but also slower? */
233	CV *cp = Perl_cv_clone (aTHX_ cv);	259	CV *cp = Perl_cv_clone (cv);
234	CvPADLIST (cv) = CvPADLIST (cp);	260	CvPADLIST (cv) = CvPADLIST (cp);
235	CvPADLIST (cp) = 0;	261	CvPADLIST (cp) = 0;
236	SvREFCNT_dec (cp);	262	SvREFCNT_dec (cp);
237	#else	263	#else
238	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	264	CvPADLIST (cv) = coro_clone_padlist (cv);
239	#endif	265	#endif
240	}	266	}
241	}	267	}
242		268
243	static void	269	static void
244	put_padlist (pTHX_ CV *cv)	270	put_padlist (CV *cv)
245	{	271	{
246	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	272	MAGIC *mg = CORO_MAGIC (cv);
		273	AV *av;
247		274
248	if (!mg)	275	if (!mg)
249	{	276	{
250	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	277	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	278	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252	mg->mg_virtual = &vtbl_coro;	279	mg->mg_virtual = &vtbl_coro;
253	mg->mg_obj = (SV *)newAV ();	280	mg->mg_obj = (SV *)newAV ();
254	}	281	}
255		282
256	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	283	av = (AV *)mg->mg_obj;
		284
		285	if (AvFILLp (av) >= AvMAX (av))
		286	av_extend (av, AvMAX (av) + 1);
		287
		288	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
257	}	289	}
258		290
259	#define SB do {	291	#define SB do {
260	#define SE } while (0)	292	#define SE } while (0)
261		293
262	#define LOAD(state) load_state(aTHX_ (state));	294	#define LOAD(state) load_state ((state))
263	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	295	#define SAVE(state,flags) save_state ((state),(flags))
264		296
265	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	297	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
266		298
267	static void	299	static void
268	load_state(pTHX_ Coro__State c)	300	load_state (Coro__State c)
269	{	301	{
270	PL_dowarn = c->dowarn;	302	#define VAR(name,type) PL_ ## name = c->name;
271	PL_in_eval = c->in_eval;	303	# include "state.h"
272		304	#undef VAR
273	PL_curstackinfo = c->curstackinfo;
274	PL_curstack = c->curstack;
275	PL_mainstack = c->mainstack;
276	PL_stack_sp = c->stack_sp;
277	PL_op = c->op;
278	PL_curpad = c->curpad;
279	PL_comppad = c->comppad;
280	PL_compcv = c->compcv;
281	PL_stack_base = c->stack_base;
282	PL_stack_max = c->stack_max;
283	PL_tmps_stack = c->tmps_stack;
284	PL_tmps_floor = c->tmps_floor;
285	PL_tmps_ix = c->tmps_ix;
286	PL_tmps_max = c->tmps_max;
287	PL_markstack = c->markstack;
288	PL_markstack_ptr = c->markstack_ptr;
289	PL_markstack_max = c->markstack_max;
290	PL_scopestack = c->scopestack;
291	PL_scopestack_ix = c->scopestack_ix;
292	PL_scopestack_max = c->scopestack_max;
293	PL_savestack = c->savestack;
294	PL_savestack_ix = c->savestack_ix;
295	PL_savestack_max = c->savestack_max;
296	#if PERL_VERSION < 9
297	PL_retstack = c->retstack;
298	PL_retstack_ix = c->retstack_ix;
299	PL_retstack_max = c->retstack_max;
300	#endif
301	PL_curpm = c->curpm;
302	PL_curcop = c->curcop;
303	PL_top_env = c->top_env;
304		305
305	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
306	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
307	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
308		309
…		…
311	CV *cv;	312	CV *cv;
312		313
313	/* now do the ugly restore mess */	314	/* now do the ugly restore mess */
314	while ((cv = (CV *)POPs))	315	while ((cv = (CV *)POPs))
315	{	316	{
316	AV *padlist = (AV *)POPs;
317
318	if (padlist)
319	{
320	put_padlist (aTHX_ cv); /* mark this padlist as available */	317	put_padlist (cv); /* mark this padlist as available */
321	CvPADLIST(cv) = padlist;	318	CvDEPTH (cv) = PTR2IV (POPs);
322	}	319	CvPADLIST (cv) = (AV *)POPs;
323
324	++CvDEPTH(cv);
325	}	320	}
326		321
327	PUTBACK;	322	PUTBACK;
328	}	323	}
329	}	324	}
330		325
331	static void	326	static void
332	save_state(pTHX_ Coro__State c, int flags)	327	save_state (Coro__State c, int flags)
333	{	328	{
334	{	329	{
335	dSP;	330	dSP;
336	I32 cxix = cxstack_ix;	331	I32 cxix = cxstack_ix;
337	PERL_CONTEXT *ccstk = cxstack;	332	PERL_CONTEXT *ccstk = cxstack;
…		…
348	{	343	{
349	while (cxix >= 0)	344	while (cxix >= 0)
350	{	345	{
351	PERL_CONTEXT *cx = &ccstk[cxix--];	346	PERL_CONTEXT *cx = &ccstk[cxix--];
352		347
353	if (CxTYPE(cx) == CXt_SUB)	348	if (CxTYPE (cx) == CXt_SUB)
354	{	349	{
355	CV *cv = cx->blk_sub.cv;	350	CV *cv = cx->blk_sub.cv;
		351
356	if (CvDEPTH(cv))	352	if (CvDEPTH (cv))
357	{	353	{
358	EXTEND (SP, CvDEPTH(cv)*2);	354	EXTEND (SP, 3);
359		355
360	while (--CvDEPTH(cv))
361	{
362	/* this tells the restore code to increment CvDEPTH */
363	PUSHs (Nullsv);
364	PUSHs ((SV *)cv);
365	}
366
367	PUSHs ((SV *)CvPADLIST(cv));	356	PUSHs ((SV *)CvPADLIST (cv));
		357	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
368	PUSHs ((SV *)cv);	358	PUSHs ((SV *)cv);
369		359
		360	CvDEPTH (cv) = 0;
370	get_padlist (aTHX_ cv);	361	get_padlist (cv);
371	}	362	}
372	}	363	}
373	#ifdef CXt_FORMAT	364	#ifdef CXt_FORMAT
374	else if (CxTYPE(cx) == CXt_FORMAT)	365	else if (CxTYPE (cx) == CXt_FORMAT)
375	{	366	{
376	/* I never used formats, so how should I know how these are implemented? */	367	/* I never used formats, so how should I know how these are implemented? */
377	/* my bold guess is as a simple, plain sub... */	368	/* my bold guess is as a simple, plain sub... */
378	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	369	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
379	}	370	}
…		…
393		384
394	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	385	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
395	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	386	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
396	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	387	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
397		388
398	c->dowarn = PL_dowarn;	389	#define VAR(name,type)c->name = PL_ ## name;
399	c->in_eval = PL_in_eval;	390	# include "state.h"
400		391	#undef VAR
401	c->curstackinfo = PL_curstackinfo;
402	c->curstack = PL_curstack;
403	c->mainstack = PL_mainstack;
404	c->stack_sp = PL_stack_sp;
405	c->op = PL_op;
406	c->curpad = PL_curpad;
407	c->comppad = PL_comppad;
408	c->compcv = PL_compcv;
409	c->stack_base = PL_stack_base;
410	c->stack_max = PL_stack_max;
411	c->tmps_stack = PL_tmps_stack;
412	c->tmps_floor = PL_tmps_floor;
413	c->tmps_ix = PL_tmps_ix;
414	c->tmps_max = PL_tmps_max;
415	c->markstack = PL_markstack;
416	c->markstack_ptr = PL_markstack_ptr;
417	c->markstack_max = PL_markstack_max;
418	c->scopestack = PL_scopestack;
419	c->scopestack_ix = PL_scopestack_ix;
420	c->scopestack_max = PL_scopestack_max;
421	c->savestack = PL_savestack;
422	c->savestack_ix = PL_savestack_ix;
423	c->savestack_max = PL_savestack_max;
424	#if PERL_VERSION < 9
425	c->retstack = PL_retstack;
426	c->retstack_ix = PL_retstack_ix;
427	c->retstack_max = PL_retstack_max;
428	#endif
429	c->curpm = PL_curpm;
430	c->curcop = PL_curcop;
431	c->top_env = PL_top_env;
432	}	392	}
433		393
434	/*	394	/*
435	* allocate various perl stacks. This is an exact copy	395	* allocate various perl stacks. This is an exact copy
436	* of perl.c:init_stacks, except that it uses less memory	396	* of perl.c:init_stacks, except that it uses less memory
437	* on the (sometimes correct) assumption that coroutines do	397	* on the (sometimes correct) assumption that coroutines do
438	* not usually need a lot of stackspace.	398	* not usually need a lot of stackspace.
439	*/	399	*/
440	static void	400	static void
441	coro_init_stacks (pTHX)	401	coro_init_stacks ()
442	{	402	{
443	LOCK;
444
445	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	403	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
446	PL_curstackinfo->si_type = PERLSI_MAIN;	404	PL_curstackinfo->si_type = PERLSI_MAIN;
447	PL_curstack = PL_curstackinfo->si_stack;	405	PL_curstack = PL_curstackinfo->si_stack;
448	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	406	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449		407
450	PL_stack_base = AvARRAY(PL_curstack);	408	PL_stack_base = AvARRAY(PL_curstack);
451	PL_stack_sp = PL_stack_base;	409	PL_stack_sp = PL_stack_base;
452	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	410	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453		411
454	New(50,PL_tmps_stack,96,SV*);	412	New(50,PL_tmps_stack,128,SV*);
455	PL_tmps_floor = -1;	413	PL_tmps_floor = -1;
456	PL_tmps_ix = -1;	414	PL_tmps_ix = -1;
457	PL_tmps_max = 96;	415	PL_tmps_max = 128;
458		416
459	New(54,PL_markstack,16,I32);	417	New(54,PL_markstack,32,I32);
460	PL_markstack_ptr = PL_markstack;	418	PL_markstack_ptr = PL_markstack;
461	PL_markstack_max = PL_markstack + 16;	419	PL_markstack_max = PL_markstack + 32;
462		420
463	#ifdef SET_MARK_OFFSET	421	#ifdef SET_MARK_OFFSET
464	SET_MARK_OFFSET;	422	SET_MARK_OFFSET;
465	#endif	423	#endif
466		424
467	New(54,PL_scopestack,16,I32);	425	New(54,PL_scopestack,32,I32);
468	PL_scopestack_ix = 0;	426	PL_scopestack_ix = 0;
469	PL_scopestack_max = 16;	427	PL_scopestack_max = 32;
470		428
471	New(54,PL_savestack,96,ANY);	429	New(54,PL_savestack,64,ANY);
472	PL_savestack_ix = 0;	430	PL_savestack_ix = 0;
473	PL_savestack_max = 96;	431	PL_savestack_max = 64;
474		432
475	#if PERL_VERSION < 9	433	#if !PERL_VERSION_ATLEAST (5,9,0)
476	New(54,PL_retstack,8,OP*);	434	New(54,PL_retstack,16,OP*);
477	PL_retstack_ix = 0;	435	PL_retstack_ix = 0;
478	PL_retstack_max = 8;	436	PL_retstack_max = 16;
479	#endif	437	#endif
480
481	UNLOCK;
482	}	438	}
483		439
484	/*	440	/*
485	* destroy the stacks, the callchain etc...	441	* destroy the stacks, the callchain etc...
486	*/	442	*/
487	static void	443	static void
488	destroy_stacks(pTHX)	444	coro_destroy_stacks ()
489	{	445	{
490	if (!IN_DESTRUCT)	446	if (!IN_DESTRUCT)
491	{	447	{
492	/* is this ugly, I ask? */	448	/* is this ugly, I ask? */
493	LEAVE_SCOPE (0);	449	LEAVE_SCOPE (0);
…		…
524		480
525	Safefree (PL_tmps_stack);	481	Safefree (PL_tmps_stack);
526	Safefree (PL_markstack);	482	Safefree (PL_markstack);
527	Safefree (PL_scopestack);	483	Safefree (PL_scopestack);
528	Safefree (PL_savestack);	484	Safefree (PL_savestack);
529	#if PERL_VERSION < 9	485	#if !PERL_VERSION_ATLEAST (5,9,0)
530	Safefree (PL_retstack);	486	Safefree (PL_retstack);
531	#endif	487	#endif
532	}	488	}
533		489
534	static void	490	static void
535	allocate_stack (Coro__State ctx, int alloc)	491	setup_coro (struct coro *coro)
536	{
537	coro_stack *stack;
538
539	New (0, stack, 1, coro_stack);
540
541	stack->refcnt = 1;
542	stack->usecnt = 1;
543	stack->gencnt = ctx->gencnt = 0;
544
545	if (alloc)
546	{
547	#if HAVE_MMAP
548	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
549	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
550	if (stack->sptr != (void *)-1)
551	{
552	# if STACKGUARD
553	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
554	# endif
555	}
556	else
557	#endif
558	{
559	stack->ssize = - (STACKSIZE * (long)sizeof (long));
560	New (0, stack->sptr, STACKSIZE, long);
561	}
562	}
563	else
564	stack->sptr = 0;
565
566	ctx->stack = stack;
567	}
568
569	static void
570	deallocate_stack (Coro__State ctx)
571	{
572	coro_stack *stack = ctx->stack;
573
574	ctx->stack = 0;
575
576	if (stack)
577	{
578	if (!--stack->refcnt)
579	{
580	#ifdef HAVE_MMAP
581	if (stack->ssize > 0 && stack->sptr)
582	munmap (stack->sptr, stack->ssize);
583	else
584	#endif
585	Safefree (stack->sptr);
586
587	Safefree (stack);
588	}
589	else if (ctx->gencnt == stack->gencnt)
590	--stack->usecnt;
591	}
592	}
593
594	static void
595	setup_coro (void *arg)
596	{	492	{
597	/*	493	/*
598	* emulate part of the perl startup here.	494	* emulate part of the perl startup here.
599	*/	495	*/
600	dTHX;
601	dSP;
602	Coro__State ctx = (Coro__State)arg;
603	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
604		496
605	coro_init_stacks (aTHX);	497	coro_init_stacks ();
606	/*PL_curcop = 0;*/	498
607	/*PL_in_eval = PL_in_eval;*/ /* inherit */	499	PL_curcop = &PL_compiling;
		500	PL_in_eval = EVAL_NULL;
		501	PL_curpm = 0;
		502	PL_localizing = 0;
		503	PL_dirty = 0;
		504	PL_restartop = 0;
		505
		506	{
		507	dSP;
		508	LOGOP myop;
		509
608	SvREFCNT_dec (GvAV (PL_defgv));	510	SvREFCNT_dec (GvAV (PL_defgv));
609	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	511	GvAV (PL_defgv) = coro->args; coro->args = 0;
610		512
611	SPAGAIN;
612
613	if (ctx->stack)
614	{
615	ctx->cursp = 0;
616
617	PUSHMARK(SP);
618	PUTBACK;
619	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
620
621	if (SvTRUE (ERRSV))
622	croak (NULL);
623	else
624	croak ("FATAL: CCTXT coroutine returned!");
625	}
626	else
627	{
628	UNOP myop;
629
630	PL_op = (OP *)&myop;
631
632	Zero(&myop, 1, UNOP);	513	Zero (&myop, 1, LOGOP);
633	myop.op_next = Nullop;	514	myop.op_next = Nullop;
634	myop.op_flags = OPf_WANT_VOID;	515	myop.op_flags = OPf_WANT_VOID;
635		516
636	PUSHMARK(SP);	517	PUSHMARK (SP);
637	XPUSHs (sub_init);	518	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
638	/*
639	* the next line is slightly wrong, as PL_op->op_next
640	* is actually being executed so we skip the first op.
641	* that doesn't matter, though, since it is only
642	* pp_nextstate and we never return...
643	* ah yes, and I don't care anyways ;)
644	*/
645	PUTBACK;	519	PUTBACK;
		520	PL_op = (OP *)&myop;
646	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	521	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
647	SPAGAIN;	522	SPAGAIN;
		523	}
648		524
649	ENTER; /* necessary e.g. for dounwind */	525	ENTER; /* necessary e.g. for dounwind */
650	}
651	}	526	}
652		527
653	static void	528	static void
654	continue_coro (void *arg)	529	free_coro_mortal ()
655	{	530	{
656	/*
657	* this is a _very_ stripped down perl interpreter ;)
658	*/
659	dTHX;
660	Coro__State ctx = (Coro__State)arg;
661
662	PL_top_env = &ctx->start_env;
663
664	ctx->cursp = 0;
665	PL_op = PL_op->op_next;
666	CALLRUNOPS(aTHX);
667
668	abort ();
669	}
670
671	static void
672	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
673	{
674	dSTACKLEVEL;
675
676	if (prev != next)
677	{
678	if (next->mainstack)
679	{
680	LOCK;
681	SAVE (prev, flags);
682	LOAD (next);
683	UNLOCK;
684
685	/* mark this state as in-use */
686	next->mainstack = 0;
687	next->tmps_ix = -2;
688
689	/* stacklevel changed? if yes, grab the stack for us! */
690	if (flags & TRANSFER_SAVE_CCTXT)
691	{
692	if (!prev->stack)
693	allocate_stack (prev, 0);
694	else if (prev->cursp != stacklevel
695	&& prev->stack->usecnt > 1)
696	{
697	prev->gencnt = ++prev->stack->gencnt;
698	prev->stack->usecnt = 1;
699	}
700
701	/* has our stack been invalidated? */
702	if (next->stack && next->stack->gencnt != next->gencnt)
703	{
704	deallocate_stack (next);
705	allocate_stack (next, 1);
706	coro_create (&(next->stack->cctx),
707	continue_coro, (void *)next,
708	next->stack->sptr, labs (next->stack->ssize));
709	}
710
711	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712	prev->cursp = stacklevel;
713	/* don't add any code here */
714	}
715	else
716	next->cursp = stacklevel;
717	}
718	else if (next->tmps_ix == -2)
719	croak ("tried to transfer to running coroutine");
720	else
721	{
722	LOCK;
723	SAVE (prev, -1); /* first get rid of the old state */
724	UNLOCK;
725
726	if (flags & TRANSFER_SAVE_CCTXT)
727	{
728	if (!prev->stack)
729	allocate_stack (prev, 0);
730
731	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732	{
733	PL_top_env = &next->start_env;
734
735	setup_coro (next);
736	next->cursp = stacklevel;
737
738	prev->stack->refcnt++;
739	prev->stack->usecnt++;
740	next->stack = prev->stack;
741	next->gencnt = prev->gencnt;
742	}
743	else
744	{
745	assert (!next->stack);
746	allocate_stack (next, 1);
747	coro_create (&(next->stack->cctx),
748	setup_coro, (void *)next,
749	next->stack->sptr, labs (next->stack->ssize));
750	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751	prev->cursp = stacklevel;
752	/* don't add any code here */
753	}
754	}
755	else
756	{
757	setup_coro (next);
758	next->cursp = stacklevel;
759	}
760	}
761	}
762
763	LOCK;
764	if (coro_mortal)	531	if (coro_mortal)
765	{	532	{
766	SvREFCNT_dec (coro_mortal);	533	SvREFCNT_dec (coro_mortal);
767	coro_mortal = 0;	534	coro_mortal = 0;
768	}	535	}
		536	}
		537
		538	/* inject a fake call to Coro::State::_cctx_init into the execution */
		539	static void NOINLINE
		540	prepare_cctx (coro_cctx *cctx)
		541	{
		542	dSP;
		543	LOGOP myop;
		544
		545	Zero (&myop, 1, LOGOP);
		546	myop.op_next = PL_op;
		547	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		548
		549	PUSHMARK (SP);
		550	EXTEND (SP, 2);
		551	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		552	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		553	PUTBACK;
		554	PL_op = (OP *)&myop;
		555	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		556	SPAGAIN;
		557	}
		558
		559	static void
		560	coro_run (void *arg)
		561	{
		562	/* coro_run is the alternative tail of transfer(), so unlock here. */
769	UNLOCK;	563	UNLOCK;
770	}
771		564
772	#define SV_CORO(sv,func) \	565	/*
773	do { \	566	* this is a _very_ stripped down perl interpreter ;)
774	if (SvROK (sv)) \	567	*/
775	sv = SvRV (sv); \	568	PL_top_env = &PL_start_env;
776	\
777	if (SvTYPE (sv) == SVt_PVHV) \
778	{ \
779	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
780	\
781	if (!he) \
782	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
783	\
784	(sv) = SvRV (HeVAL(he)); \
785	} \
786	\
787	/* must also be changed inside Coro::Cont::yield */ \
788	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
789	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
790	\
791	} while(0)
792		569
793	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	570	/* inject call to cctx_init */
		571	prepare_cctx ((coro_cctx *)arg);
794		572
		573	/* somebody will hit me for both perl_run and PL_restartop */
		574	PL_restartop = PL_op;
		575	perl_run (PL_curinterp);
		576
		577	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		578	abort ();
		579	}
		580
		581	static coro_cctx *
		582	cctx_new ()
		583	{
		584	coro_cctx *cctx;
		585
		586	++cctx_count;
		587
		588	New (0, cctx, 1, coro_cctx);
		589
		590	#if HAVE_MMAP
		591
		592	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		593	/* mmap supposedly does allocate-on-write for us */
		594	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		595
		596	if (cctx->sptr == (void *)-1)
		597	{
		598	perror ("FATAL: unable to mmap stack for coroutine");
		599	_exit (EXIT_FAILURE);
		600	}
		601
		602	# if STACKGUARD
		603	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		604	# endif
		605
		606	#else
		607
		608	cctx->ssize = STACKSIZE * (long)sizeof (long);
		609	New (0, cctx->sptr, STACKSIZE, long);
		610
		611	if (!cctx->sptr)
		612	{
		613	perror ("FATAL: unable to malloc stack for coroutine");
		614	_exit (EXIT_FAILURE);
		615	}
		616
		617	#endif
		618
		619	#if USE_VALGRIND
		620	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		621	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		622	cctx->ssize + (char *)cctx->sptr
		623	);
		624	#endif
		625
		626	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		627
		628	return cctx;
		629	}
		630
		631	static void
		632	cctx_destroy (coro_cctx *cctx)
		633	{
		634	if (!cctx)
		635	return;
		636
		637	--cctx_count;
		638
		639	#if USE_VALGRIND
		640	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		641	#endif
		642
		643	#if HAVE_MMAP
		644	munmap (cctx->sptr, cctx->ssize);
		645	#else
		646	Safefree (cctx->sptr);
		647	#endif
		648
		649	Safefree (cctx);
		650	}
		651
		652	static coro_cctx *
		653	cctx_get ()
		654	{
		655	coro_cctx *cctx;
		656
		657	if (cctx_first)
		658	{
		659	cctx = cctx_first;
		660	cctx_first = cctx->next;
		661	--cctx_idle;
		662	}
		663	else
		664	{
		665	cctx = cctx_new ();
		666	PL_op = PL_op->op_next;
		667	}
		668
		669	return cctx;
		670	}
		671
		672	static void
		673	cctx_put (coro_cctx *cctx)
		674	{
		675	/* free another cctx if overlimit */
		676	if (cctx_idle >= MAX_IDLE_CCTX)
		677	{
		678	coro_cctx *first = cctx_first;
		679	cctx_first = first->next;
		680	--cctx_idle;
		681
		682	assert (!first->inuse);
		683	cctx_destroy (first);
		684	}
		685
		686	++cctx_idle;
		687	cctx->next = cctx_first;
		688	cctx_first = cctx;
		689	}
		690
		691	/* never call directly, always through the coro_state_transfer global variable */
		692	static void NOINLINE
		693	transfer (struct coro *prev, struct coro *next, int flags)
		694	{
		695	dSTACKLEVEL;
		696
		697	/* sometimes transfer is only called to set idle_sp */
		698	if (flags == TRANSFER_SET_STACKLEVEL)
		699	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		700	else if (prev != next)
		701	{
		702	coro_cctx *prev__cctx;
		703
		704	if (prev->flags & CF_NEW)
		705	{
		706	/* create a new empty context */
		707	Newz (0, prev->cctx, 1, coro_cctx);
		708	prev->cctx->inuse = 1;
		709	prev->flags &= ~CF_NEW;
		710	prev->flags |= CF_RUNNING;
		711	}
		712
		713	/*TODO: must not croak here */
		714	if (!prev->flags & CF_RUNNING)
		715	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		716
		717	if (next->flags & CF_RUNNING)
		718	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		719
		720	prev->flags &= ~CF_RUNNING;
		721	next->flags |= CF_RUNNING;
		722
		723	LOCK;
		724
		725	if (next->flags & CF_NEW)
		726	{
		727	/* need to start coroutine */
		728	next->flags &= ~CF_NEW;
		729	/* first get rid of the old state */
		730	SAVE (prev, -1);
		731	/* setup coroutine call */
		732	setup_coro (next);
		733	/* need a new stack */
		734	assert (!next->stack);
		735	}
		736	else
		737	{
		738	/* coroutine already started */
		739	SAVE (prev, flags);
		740	LOAD (next);
		741	}
		742
		743	prev__cctx = prev->cctx;
		744
		745	/* possibly "free" the cctx */
		746	if (prev__cctx->idle_sp == STACKLEVEL)
		747	{
		748	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		749	assert (PL_top_env == prev__cctx->top_env);
		750
		751	prev->cctx = 0;
		752
		753	cctx_put (prev__cctx);
		754	prev__cctx->inuse = 0;
		755	}
		756
		757	if (!next->cctx)
		758	{
		759	next->cctx = cctx_get ();
		760	assert (!next->cctx->inuse);
		761	next->cctx->inuse = 1;
		762	}
		763
		764	if (prev__cctx != next->cctx)
		765	{
		766	prev__cctx->top_env = PL_top_env;
		767	PL_top_env = next->cctx->top_env;
		768	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		769	}
		770
		771	free_coro_mortal ();
		772
		773	UNLOCK;
		774	}
		775	}
		776
		777	struct transfer_args
		778	{
		779	struct coro *prev, *next;
		780	int flags;
		781	};
		782
		783	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		784
		785	static void
		786	coro_state_destroy (struct coro *coro)
		787	{
		788	if (coro->refcnt--)
		789	return;
		790
		791	if (coro->mainstack && coro->mainstack != main_mainstack)
		792	{
		793	struct coro temp;
		794
		795	if (coro->flags & CF_RUNNING)
		796	croak ("FATAL: tried to destroy currently running coroutine");
		797
		798	SAVE ((&temp), TRANSFER_SAVE_ALL);
		799	LOAD (coro);
		800
		801	coro_destroy_stacks ();
		802
		803	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		804
		805	coro->mainstack = 0;
		806	}
		807
		808	cctx_destroy (coro->cctx);
		809	SvREFCNT_dec (coro->args);
		810	Safefree (coro);
		811	}
		812
795	static void	813	static int
		814	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		815	{
		816	struct coro *coro = (struct coro *)mg->mg_ptr;
		817	mg->mg_ptr = 0;
		818
		819	coro_state_destroy (coro);
		820
		821	return 0;
		822	}
		823
		824	static int
		825	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		826	{
		827	struct coro *coro = (struct coro *)mg->mg_ptr;
		828
		829	++coro->refcnt;
		830
		831	return 0;
		832	}
		833
		834	static MGVTBL coro_state_vtbl = {
		835	0, 0, 0, 0,
		836	coro_state_clear,
		837	0,
		838	#ifdef MGf_DUP
		839	coro_state_dup,
		840	#else
		841	# define MGf_DUP 0
		842	#endif
		843	};
		844
		845	static struct coro *
		846	SvSTATE (SV *coro)
		847	{
		848	HV *stash;
		849	MAGIC *mg;
		850
		851	if (SvROK (coro))
		852	coro = SvRV (coro);
		853
		854	stash = SvSTASH (coro);
		855	if (stash != coro_stash && stash != coro_state_stash)
		856	{
		857	/* very slow, but rare, check */
		858	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		859	croak ("Coro::State object required");
		860	}
		861
		862	mg = SvMAGIC (coro);
		863	assert (mg->mg_type == PERL_MAGIC_ext);
		864	return (struct coro *)mg->mg_ptr;
		865	}
		866
		867	static void
		868	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		869	{
		870	ta->prev = SvSTATE (prev);
		871	ta->next = SvSTATE (next);
		872	ta->flags = flags;
		873	}
		874
		875	static void
796	api_transfer(pTHX_ SV *prev, SV *next, int flags)	876	api_transfer (SV *prev, SV *next, int flags)
797	{	877	{
798	SV_CORO (prev, "Coro::transfer");	878	struct transfer_args ta;
799	SV_CORO (next, "Coro::transfer");
800		879
801	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	880	prepare_transfer (&ta, prev, next, flags);
		881	TRANSFER (ta);
802	}	882	}
803		883
804	/** Coro ********************************************************************/	884	/** Coro ********************************************************************/
805		885
806	#define PRIO_MAX 3	886	#define PRIO_MAX 3
…		…
809	#define PRIO_LOW -1	889	#define PRIO_LOW -1
810	#define PRIO_IDLE -3	890	#define PRIO_IDLE -3
811	#define PRIO_MIN -4	891	#define PRIO_MIN -4
812		892
813	/* for Coro.pm */	893	/* for Coro.pm */
814	static GV *coro_current, *coro_idle;	894	static SV *coro_current;
815	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	895	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
816	static int coro_nready;	896	static int coro_nready;
817		897
818	static void	898	static void
819	coro_enq (pTHX_ SV *sv)	899	coro_enq (SV *coro_sv)
820	{	900	{
821	SV **xprio;
822	int prio;
823
824	if (SvTYPE (sv) != SVt_PVHV)
825	croak ("Coro::ready tried to enqueue something that is not a coroutine");
826
827	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
828	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
829
830	prio = prio > PRIO_MAX ? PRIO_MAX
831	: prio < PRIO_MIN ? PRIO_MIN
832	: prio;
833
834	av_push (coro_ready [prio - PRIO_MIN], sv);	901	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
835	coro_nready++;	902	coro_nready++;
836	}	903	}
837		904
838	static SV *	905	static SV *
839	coro_deq (pTHX_ int min_prio)	906	coro_deq (int min_prio)
840	{	907	{
841	int prio = PRIO_MAX - PRIO_MIN;	908	int prio = PRIO_MAX - PRIO_MIN;
842		909
843	min_prio -= PRIO_MIN;	910	min_prio -= PRIO_MIN;
844	if (min_prio < 0)	911	if (min_prio < 0)
845	min_prio = 0;	912	min_prio = 0;
846		913
847	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	914	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
848	if (av_len (coro_ready[prio]) >= 0)	915	if (AvFILLp (coro_ready [prio]) >= 0)
849	{	916	{
850	coro_nready--;	917	coro_nready--;
851	return av_shift (coro_ready[prio]);	918	return av_shift (coro_ready [prio]);
852	}	919	}
853		920
854	return 0;	921	return 0;
855	}	922	}
856		923
857	static void	924	static int
858	api_ready (SV *coro)	925	api_ready (SV *coro_sv)
859	{	926	{
860	dTHX;	927	struct coro *coro;
861		928
862	if (SvROK (coro))	929	if (SvROK (coro_sv))
863	coro = SvRV (coro);	930	coro_sv = SvRV (coro_sv);
		931
		932	coro = SvSTATE (coro_sv);
		933
		934	if (coro->flags & CF_READY)
		935	return 0;
		936
		937	#if 0 /* this is actually harmless */
		938	if (coro->flags & CF_RUNNING)
		939	croak ("Coro::ready called on currently running coroutine");
		940	#endif
		941
		942	coro->flags |= CF_READY;
864		943
865	LOCK;	944	LOCK;
866	coro_enq (aTHX_ SvREFCNT_inc (coro));	945	coro_enq (SvREFCNT_inc (coro_sv));
867	UNLOCK;	946	UNLOCK;
		947
		948	return 1;
		949	}
		950
		951	static int
		952	api_is_ready (SV *coro_sv)
		953	{
		954	return !!SvSTATE (coro_sv)->flags & CF_READY;
		955	}
		956
		957	static void
		958	prepare_schedule (struct transfer_args *ta)
		959	{
		960	SV *prev, *next;
		961
		962	for (;;)
		963	{
		964	LOCK;
		965	next = coro_deq (PRIO_MIN);
		966	UNLOCK;
		967
		968	if (next)
		969	break;
		970
		971	{
		972	dSP;
		973
		974	ENTER;
		975	SAVETMPS;
		976
		977	PUSHMARK (SP);
		978	PUTBACK;
		979	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		980
		981	FREETMPS;
		982	LEAVE;
		983	}
		984	}
		985
		986	prev = SvRV (coro_current);
		987	SvRV_set (coro_current, next);
		988
		989	/* free this only after the transfer */
		990	LOCK;
		991	free_coro_mortal ();
		992	UNLOCK;
		993	coro_mortal = prev;
		994
		995	assert (!SvROK(prev));//D
		996	assert (!SvROK(next));//D
		997
		998	ta->prev = SvSTATE (prev);
		999	ta->next = SvSTATE (next);
		1000	ta->flags = TRANSFER_SAVE_ALL;
		1001
		1002	assert (ta->flags & CF_READY);
		1003	ta->next->flags &= ~CF_READY;
		1004	}
		1005
		1006	static void
		1007	prepare_cede (struct transfer_args *ta)
		1008	{
		1009	api_ready (coro_current);
		1010
		1011	prepare_schedule (ta);
868	}	1012	}
869		1013
870	static void	1014	static void
871	api_schedule (void)	1015	api_schedule (void)
872	{	1016	{
873	dTHX;	1017	struct transfer_args ta;
874		1018
875	SV *prev, *next;	1019	prepare_schedule (&ta);
876		1020	TRANSFER (ta);
877	LOCK;
878
879	prev = SvRV (GvSV (coro_current));
880	next = coro_deq (aTHX_ PRIO_MIN);
881
882	if (!next)
883	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
884
885	/* free this only after the transfer */
886	coro_mortal = prev;
887	SV_CORO (prev, "Coro::schedule");
888
889	SvRV (GvSV (coro_current)) = next;
890
891	SV_CORO (next, "Coro::schedule");
892
893	UNLOCK;
894
895	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
896	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
897	}	1021	}
898		1022
899	static void	1023	static void
900	api_cede (void)	1024	api_cede (void)
901	{	1025	{
902	dTHX;	1026	struct transfer_args ta;
903		1027
904	LOCK;	1028	prepare_cede (&ta);
905	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1029	TRANSFER (ta);
906	UNLOCK;
907
908	api_schedule ();
909	}	1030	}
910		1031
911	MODULE = Coro::State PACKAGE = Coro::State	1032	MODULE = Coro::State PACKAGE = Coro::State
912		1033
913	PROTOTYPES: ENABLE	1034	PROTOTYPES: DISABLE
914		1035
915	BOOT:	1036	BOOT:
916	{ /* {} necessary for stoopid perl-5.6.x */	1037	{
917	#ifdef USE_ITHREADS	1038	#ifdef USE_ITHREADS
918	MUTEX_INIT (&coro_mutex);	1039	MUTEX_INIT (&coro_mutex);
919	#endif	1040	#endif
920	BOOT_PAGESIZE;	1041	BOOT_PAGESIZE;
921		1042
922	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
923	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
924	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1043	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
925		1044
926	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1045	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
927	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1046	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
928	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1047	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
929	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
930		1048
931	main_mainstack = PL_mainstack;	1049	main_mainstack = PL_mainstack;
932		1050
933	coroapi.ver = CORO_API_VERSION;	1051	coroapi.ver = CORO_API_VERSION;
934	coroapi.transfer = api_transfer;	1052	coroapi.transfer = api_transfer;
935	}
936		1053
937	Coro::State	1054	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
938	_newprocess(args)	1055	}
939	SV * args	1056
940	PROTOTYPE: $	1057	SV *
		1058	new (char *klass, ...)
941	CODE:	1059	CODE:
942	Coro__State coro;	1060	{
		1061	struct coro *coro;
		1062	HV *hv;
		1063	int i;
943		1064
944	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
945	croak ("Coro::State::_newprocess expects an arrayref");
946
947	Newz (0, coro, 1, struct coro);	1065	Newz (0, coro, 1, struct coro);
		1066	coro->args = newAV ();
		1067	coro->flags = CF_NEW;
948		1068
949	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1069	hv = newHV ();
950	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1070	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
951	/*coro->stack = 0;*/	1071	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
952		1072
953	/* same as JMPENV_BOOTSTRAP */	1073	for (i = 1; i < items; i++)
954	/* we might be able to recycle start_env, but safe is safe */	1074	av_push (coro->args, newSVsv (ST (i)));
955	/*Zero(&coro->start_env, 1, JMPENV);*/	1075	}
956	coro->start_env.je_ret = -1;
957	coro->start_env.je_mustcatch = TRUE;
958
959	RETVAL = coro;
960	OUTPUT:	1076	OUTPUT:
961	RETVAL	1077	RETVAL
962		1078
963	void	1079	void
964	transfer(prev, next, flags)	1080	_set_stacklevel (...)
965	SV *prev	1081	ALIAS:
966	SV *next	1082	Coro::State::transfer = 1
967	int flags	1083	Coro::schedule = 2
968	PROTOTYPE: @	1084	Coro::cede = 3
969	CODE:	1085	CODE:
970	PUTBACK;	1086	{
971	SV_CORO (next, "Coro::transfer");	1087	struct transfer_args ta;
972	SV_CORO (prev, "Coro::transfer");	1088
973	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1089	switch (ix)
974	SPAGAIN;	1090	{
		1091	case 0:
		1092	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1093	ta.next = 0;
		1094	ta.flags = TRANSFER_SET_STACKLEVEL;
		1095	break;
		1096
		1097	case 1:
		1098	if (items != 3)
		1099	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);
		1100
		1101	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1102	break;
		1103
		1104	case 2:
		1105	prepare_schedule (&ta);
		1106	break;
		1107
		1108	case 3:
		1109	prepare_cede (&ta);
		1110	break;
		1111	}
		1112
		1113	TRANSFER (ta);
		1114	}
975		1115
976	void	1116	void
977	DESTROY(coro)	1117	_clone_state_from (SV *dst, SV *src)
978	Coro::State coro	1118	CODE:
979	CODE:	1119	{
		1120	struct coro *coro_src = SvSTATE (src);
980		1121
981	if (coro->mainstack && coro->mainstack != main_mainstack)	1122	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
982	{
983	struct coro temp;
984		1123
985	PUTBACK;	1124	++coro_src->refcnt;
986	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1125	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
987	LOAD (aTHX_ coro);	1126	}
988	SPAGAIN;
989
990	destroy_stacks (aTHX);
991
992	LOAD ((&temp)); /* this will get rid of defsv etc.. */
993	SPAGAIN;
994
995	coro->mainstack = 0;
996	}
997
998	deallocate_stack (coro);
999	SvREFCNT_dec (coro->args);
1000	Safefree (coro);
1001		1127
1002	void	1128	void
1003	_exit(code)	1129	_exit (code)
1004	int code	1130	int code
1005	PROTOTYPE: $	1131	PROTOTYPE: $
1006	CODE:	1132	CODE:
1007	_exit (code);	1133	_exit (code);
1008		1134
1009	MODULE = Coro::State PACKAGE = Coro::Cont	1135	int
		1136	cctx_count ()
		1137	CODE:
		1138	RETVAL = cctx_count;
		1139	OUTPUT:
		1140	RETVAL
1010		1141
1011	# this is slightly dirty (should expose a c-level api)	1142	int
1012		1143	cctx_idle ()
1013	void	1144	CODE:
1014	yield(...)	1145	RETVAL = cctx_idle;
1015	PROTOTYPE: @	1146	OUTPUT:
1016	CODE:	1147	RETVAL
1017	SV *yieldstack;
1018	SV *sv;
1019	AV *defav = GvAV (PL_defgv);
1020	struct coro *prev, *next;
1021
1022	yieldstack = *hv_fetch (
1023	(HV *)SvRV (GvSV (coro_current)),
1024	"yieldstack", sizeof ("yieldstack") - 1,
1025	0
1026	);
1027
1028	/* set up @_ -- ugly */
1029	av_clear (defav);
1030	av_fill (defav, items - 1);
1031	while (items--)
1032	av_store (defav, items, SvREFCNT_inc (ST(items)));
1033
1034	sv = av_pop ((AV *)SvRV (yieldstack));
1035	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1036	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1037	SvREFCNT_dec (sv);
1038
1039	transfer (aTHX_ prev, next, 0);
1040		1148
1041	MODULE = Coro::State PACKAGE = Coro	1149	MODULE = Coro::State PACKAGE = Coro
1042		1150
1043	# this is slightly dirty (should expose a c-level api)
1044
1045	BOOT:	1151	BOOT:
1046	{	1152	{
1047	int i;	1153	int i;
		1154
1048	HV *stash = gv_stashpv ("Coro", TRUE);	1155	coro_stash = gv_stashpv ("Coro", TRUE);
1049		1156
1050	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1157	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1051	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1158	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1052	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1159	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1053	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1160	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1054	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1161	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1055	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1162	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1056		1163
1057	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1164	coro_current = get_sv ("Coro::current", FALSE);
1058	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1165	SvREADONLY_on (coro_current);
1059		1166
1060	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1167	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1061	coro_ready[i] = newAV ();	1168	coro_ready[i] = newAV ();
1062		1169
1063	{	1170	{
1064	SV *sv = perl_get_sv("Coro::API", 1);	1171	SV *sv = perl_get_sv("Coro::API", 1);
1065		1172
1066	coroapi.schedule = api_schedule;	1173	coroapi.schedule = api_schedule;
1067	coroapi.cede = api_cede;	1174	coroapi.cede = api_cede;
1068	coroapi.ready = api_ready;	1175	coroapi.ready = api_ready;
		1176	coroapi.is_ready = api_is_ready;
1069	coroapi.nready = &coro_nready;	1177	coroapi.nready = &coro_nready;
1070	coroapi.current = coro_current;	1178	coroapi.current = coro_current;
1071		1179
1072	GCoroAPI = &coroapi;	1180	GCoroAPI = &coroapi;
1073	sv_setiv(sv, (IV)&coroapi);	1181	sv_setiv (sv, (IV)&coroapi);
1074	SvREADONLY_on(sv);	1182	SvREADONLY_on (sv);
1075	}	1183	}
1076	}	1184	}
1077		1185
1078	#if !PERL_MICRO	1186	int
		1187	prio (Coro::State coro, int newprio = 0)
		1188	ALIAS:
		1189	nice = 1
		1190	CODE:
		1191	{
		1192	RETVAL = coro->prio;
1079		1193
1080	void	1194	if (items > 1)
		1195	{
		1196	if (ix)
		1197	newprio += coro->prio;
		1198
		1199	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1200	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1201
		1202	coro->prio = newprio;
		1203	}
		1204	}
		1205
		1206	SV *
1081	ready(self)	1207	ready (SV *self)
1082	SV * self
1083	PROTOTYPE: $	1208	PROTOTYPE: $
1084	CODE:	1209	CODE:
1085	api_ready (self);	1210	RETVAL = boolSV (api_ready (self));
		1211	OUTPUT:
		1212	RETVAL
1086		1213
1087	#endif	1214	SV *
		1215	is_ready (SV *self)
		1216	PROTOTYPE: $
		1217	CODE:
		1218	RETVAL = boolSV (api_is_ready (self));
		1219	OUTPUT:
		1220	RETVAL
1088		1221
1089	int	1222	int
1090	nready(...)	1223	nready (...)
1091	PROTOTYPE:	1224	PROTOTYPE:
1092	CODE:	1225	CODE:
1093	RETVAL = coro_nready;	1226	RETVAL = coro_nready;
1094	OUTPUT:	1227	OUTPUT:
1095	RETVAL	1228	RETVAL
1096		1229
1097	void	1230	void
1098	schedule(...)	1231	_set_current (SV *current)
1099	PROTOTYPE:	1232	PROTOTYPE: $
1100	CODE:	1233	CODE:
1101	api_schedule ();	1234	SvREFCNT_dec (SvRV (coro_current));
		1235	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1102		1236
1103	void	1237	MODULE = Coro::State PACKAGE = Coro::AIO
1104	cede(...)	1238
1105	PROTOTYPE:	1239	SV *
		1240	_get_state ()
1106	CODE:	1241	CODE:
1107	api_cede ();
1108
1109	# and these are hacks
1110	SV *
1111	_aio_get_state ()
1112	CODE:
1113	{	1242	{
1114	struct {	1243	struct io_state *data;
1115	int errorno;
1116	int laststype;
1117	int laststatval;
1118	Stat_t statcache;
1119	} data;
1120		1244
		1245	RETVAL = newSV (sizeof (struct io_state));
		1246	data = (struct io_state *)SvPVX (RETVAL);
		1247	SvCUR_set (RETVAL, sizeof (struct io_state));
		1248	SvPOK_only (RETVAL);
		1249
1121	data.errorno = errno;	1250	data->errorno = errno;
1122	data.laststype = PL_laststype;	1251	data->laststype = PL_laststype;
1123	data.laststatval = PL_laststatval;	1252	data->laststatval = PL_laststatval;
1124	data.statcache = PL_statcache;	1253	data->statcache = PL_statcache;
1125
1126	RETVAL = newSVpvn ((char *)&data, sizeof data);
1127	}	1254	}
1128	OUTPUT:	1255	OUTPUT:
1129	RETVAL	1256	RETVAL
1130		1257
1131	void	1258	void
1132	_aio_set_state (char *data_)	1259	_set_state (char *data_)
1133	PROTOTYPE: $	1260	PROTOTYPE: $
1134	CODE:	1261	CODE:
1135	{	1262	{
1136	struct {	1263	struct io_state *data = (void *)data_;
1137	int errorno;
1138	int laststype;
1139	int laststatval;
1140	Stat_t statcache;
1141	} *data = (void *)data_;
1142		1264
1143	errno = data->errorno;	1265	errno = data->errorno;
1144	PL_laststype = data->laststype;	1266	PL_laststype = data->laststype;
1145	PL_laststatval = data->laststatval;	1267	PL_laststatval = data->laststatval;
1146	PL_statcache = data->statcache;	1268	PL_statcache = data->statcache;
1147	}	1269	}
		1270

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