[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.81 by root, Fri Nov 3 00:56:03 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 optional C context */	150	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	151	coro_cctx *cctx;
107	void *cursp;	152
		153	/* data associated with this coroutine (initial args) */
		154	AV *args;
108	int gencnt;	155	int refcnt;
		156	int flags;
109		157
110	/* optionally saved, might be zero */	158	/* optionally saved, might be zero */
111	AV *defav;	159	AV *defav;
112	SV *defsv;	160	SV *defsv;
113	SV *errsv;	161	SV *errsv;
114		162
115	/* saved global state not related to stacks */	163	#define VAR(name,type) type name;
116	U8 dowarn;	164	# include "state.h"
117	I32 in_eval;	165	#undef VAR
118		166
119	/* the stacks and related info (callchain etc..) */	167	/* coro process data */
120	PERL_SI *curstackinfo;	168	int prio;
121	AV *curstack;
122	AV *mainstack;
123	SV **stack_sp;
124	OP *op;
125	SV **curpad;
126	AV *comppad;
127	CV *compcv;
128	SV **stack_base;
129	SV **stack_max;
130	SV **tmps_stack;
131	I32 tmps_floor;
132	I32 tmps_ix;
133	I32 tmps_max;
134	I32 *markstack;
135	I32 *markstack_ptr;
136	I32 *markstack_max;
137	I32 *scopestack;
138	I32 scopestack_ix;
139	I32 scopestack_max;
140	ANY *savestack;
141	I32 savestack_ix;
142	I32 savestack_max;
143	OP **retstack;
144	I32 retstack_ix;
145	I32 retstack_max;
146	PMOP *curpm;
147	COP *curcop;
148	JMPENV *top_env;
149
150	/* data associated with this coroutine (initial args) */
151	AV *args;
152	};	169	};
153		170
154	typedef struct coro *Coro__State;	171	typedef struct coro *Coro__State;
155	typedef struct coro *Coro__State_or_hashref;	172	typedef struct coro *Coro__State_or_hashref;
156		173
157	static AV *	174	static AV *
158	coro_clone_padlist (pTHX_ CV *cv)	175	coro_clone_padlist (CV *cv)
159	{	176	{
160	AV *padlist = CvPADLIST (cv);	177	AV *padlist = CvPADLIST (cv);
161	AV newpadlist, newpad;	178	AV newpadlist, newpad;
162		179
163	newpadlist = newAV ();	180	newpadlist = newAV ();
164	AvREAL_off (newpadlist);	181	AvREAL_off (newpadlist);
165	#if PERL_VERSION < 9	182	#if PERL_VERSION_ATLEAST (5,9,0)
		183	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		184	#else
166	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	185	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
167	#else
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169	#endif	186	#endif
170	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	187	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
171	--AvFILLp (padlist);	188	--AvFILLp (padlist);
172		189
173	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	190	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
175		192
176	return newpadlist;	193	return newpadlist;
177	}	194	}
178		195
179	static void	196	static void
180	free_padlist (pTHX_ AV *padlist)	197	free_padlist (AV *padlist)
181	{	198	{
182	/* may be during global destruction */	199	/* may be during global destruction */
183	if (SvREFCNT (padlist))	200	if (SvREFCNT (padlist))
184	{	201	{
185	I32 i = AvFILLp (padlist);	202	I32 i = AvFILLp (padlist);
…		…
206	AV *padlist;	223	AV *padlist;
207	AV av = (AV )mg->mg_obj;	224	AV av = (AV )mg->mg_obj;
208		225
209	/* casting is fun. */	226	/* casting is fun. */
210	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	227	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
211	free_padlist (aTHX_ padlist);	228	free_padlist (padlist);
212		229
213	SvREFCNT_dec (av);	230	SvREFCNT_dec (av);
214		231
215	return 0;	232	return 0;
216	}	233	}
217		234
218	#define PERL_MAGIC_coro PERL_MAGIC_ext	235	#define PERL_MAGIC_coro PERL_MAGIC_ext
219		236
220	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	237	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221		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
222	/* the next two functions merely cache the padlists */	246	/* the next two functions merely cache the padlists */
223	static void	247	static void
224	get_padlist (pTHX_ CV *cv)	248	get_padlist (CV *cv)
225	{	249	{
226	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	250	MAGIC *mg = CORO_MAGIC (cv);
		251	AV *av;
227		252
228	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	253	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
229	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	254	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
230	else	255	else
231	{	256	{
232	#if 0	257	#if 0
233	/* this should work - but it doesn't :( */	258	/* this is probably cleaner, but also slower? */
234	CV *cp = Perl_cv_clone (aTHX_ cv);	259	CV *cp = Perl_cv_clone (cv);
235	CvPADLIST (cv) = CvPADLIST (cp);	260	CvPADLIST (cv) = CvPADLIST (cp);
236	CvPADLIST (cp) = 0;	261	CvPADLIST (cp) = 0;
237	SvREFCNT_dec (cp);	262	SvREFCNT_dec (cp);
238	#else	263	#else
239	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	264	CvPADLIST (cv) = coro_clone_padlist (cv);
240	#endif	265	#endif
241	}	266	}
242	}	267	}
243		268
244	static void	269	static void
245	put_padlist (pTHX_ CV *cv)	270	put_padlist (CV *cv)
246	{	271	{
247	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	272	MAGIC *mg = CORO_MAGIC (cv);
		273	AV *av;
248		274
249	if (!mg)	275	if (!mg)
250	{	276	{
251	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	277	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
252	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	278	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
253	mg->mg_virtual = &vtbl_coro;	279	mg->mg_virtual = &vtbl_coro;
254	mg->mg_obj = (SV *)newAV ();	280	mg->mg_obj = (SV *)newAV ();
255	}	281	}
256		282
257	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);
258	}	289	}
259		290
260	#define SB do {	291	#define SB do {
261	#define SE } while (0)	292	#define SE } while (0)
262		293
263	#define LOAD(state) load_state(aTHX_ (state));	294	#define LOAD(state) load_state ((state))
264	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	295	#define SAVE(state,flags) save_state ((state),(flags))
265		296
266	#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
267		298
268	static void	299	static void
269	load_state(pTHX_ Coro__State c)	300	load_state (Coro__State c)
270	{	301	{
271	PL_dowarn = c->dowarn;	302	#define VAR(name,type) PL_ ## name = c->name;
272	PL_in_eval = c->in_eval;	303	# include "state.h"
273		304	#undef VAR
274	PL_curstackinfo = c->curstackinfo;
275	PL_curstack = c->curstack;
276	PL_mainstack = c->mainstack;
277	PL_stack_sp = c->stack_sp;
278	PL_op = c->op;
279	PL_curpad = c->curpad;
280	PL_comppad = c->comppad;
281	PL_compcv = c->compcv;
282	PL_stack_base = c->stack_base;
283	PL_stack_max = c->stack_max;
284	PL_tmps_stack = c->tmps_stack;
285	PL_tmps_floor = c->tmps_floor;
286	PL_tmps_ix = c->tmps_ix;
287	PL_tmps_max = c->tmps_max;
288	PL_markstack = c->markstack;
289	PL_markstack_ptr = c->markstack_ptr;
290	PL_markstack_max = c->markstack_max;
291	PL_scopestack = c->scopestack;
292	PL_scopestack_ix = c->scopestack_ix;
293	PL_scopestack_max = c->scopestack_max;
294	PL_savestack = c->savestack;
295	PL_savestack_ix = c->savestack_ix;
296	PL_savestack_max = c->savestack_max;
297	#if PERL_VERSION < 9
298	PL_retstack = c->retstack;
299	PL_retstack_ix = c->retstack_ix;
300	PL_retstack_max = c->retstack_max;
301	#endif
302	PL_curpm = c->curpm;
303	PL_curcop = c->curcop;
304	PL_top_env = c->top_env;
305		305
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
309		309
…		…
312	CV *cv;	312	CV *cv;
313		313
314	/* now do the ugly restore mess */	314	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	315	while ((cv = (CV *)POPs))
316	{	316	{
317	AV padlist = (AV )POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	317	put_padlist (cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	318	CvDEPTH (cv) = PTR2IV (POPs);
323	}	319	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	320	}
327		321
328	PUTBACK;	322	PUTBACK;
329	}	323	}
330	}	324	}
331		325
332	static void	326	static void
333	save_state(pTHX_ Coro__State c, int flags)	327	save_state (Coro__State c, int flags)
334	{	328	{
335	{	329	{
336	dSP;	330	dSP;
337	I32 cxix = cxstack_ix;	331	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	332	PERL_CONTEXT *ccstk = cxstack;
…		…
349	{	343	{
350	while (cxix >= 0)	344	while (cxix >= 0)
351	{	345	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	346	PERL_CONTEXT *cx = &ccstk[cxix--];
353		347
354	if (CxTYPE(cx) == CXt_SUB)	348	if (CxTYPE (cx) == CXt_SUB)
355	{	349	{
356	CV *cv = cx->blk_sub.cv;	350	CV *cv = cx->blk_sub.cv;
		351
357	if (CvDEPTH(cv))	352	if (CvDEPTH (cv))
358	{	353	{
359	EXTEND (SP, CvDEPTH(cv)*2);	354	EXTEND (SP, 3);
360		355
361	while (--CvDEPTH(cv))
362	{
363	/* this tells the restore code to increment CvDEPTH */
364	PUSHs (Nullsv);
365	PUSHs ((SV *)cv);
366	}
367
368	PUSHs ((SV *)CvPADLIST(cv));	356	PUSHs ((SV *)CvPADLIST (cv));
		357	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	358	PUSHs ((SV *)cv);
370		359
		360	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	361	get_padlist (cv);
372	}	362	}
373	}	363	}
374	#ifdef CXt_FORMAT	364	#ifdef CXt_FORMAT
375	else if (CxTYPE(cx) == CXt_FORMAT)	365	else if (CxTYPE (cx) == CXt_FORMAT)
376	{	366	{
377	/* 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? */
378	/* my bold guess is as a simple, plain sub... */	368	/* my bold guess is as a simple, plain sub... */
379	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");
380	}	370	}
…		…
394		384
395	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;
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	386	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	387	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
398		388
399	c->dowarn = PL_dowarn;	389	#define VAR(name,type)c->name = PL_ ## name;
400	c->in_eval = PL_in_eval;	390	# include "state.h"
401		391	#undef VAR
402	c->curstackinfo = PL_curstackinfo;
403	c->curstack = PL_curstack;
404	c->mainstack = PL_mainstack;
405	c->stack_sp = PL_stack_sp;
406	c->op = PL_op;
407	c->curpad = PL_curpad;
408	c->comppad = PL_comppad;
409	c->compcv = PL_compcv;
410	c->stack_base = PL_stack_base;
411	c->stack_max = PL_stack_max;
412	c->tmps_stack = PL_tmps_stack;
413	c->tmps_floor = PL_tmps_floor;
414	c->tmps_ix = PL_tmps_ix;
415	c->tmps_max = PL_tmps_max;
416	c->markstack = PL_markstack;
417	c->markstack_ptr = PL_markstack_ptr;
418	c->markstack_max = PL_markstack_max;
419	c->scopestack = PL_scopestack;
420	c->scopestack_ix = PL_scopestack_ix;
421	c->scopestack_max = PL_scopestack_max;
422	c->savestack = PL_savestack;
423	c->savestack_ix = PL_savestack_ix;
424	c->savestack_max = PL_savestack_max;
425	#if PERL_VERSION < 9
426	c->retstack = PL_retstack;
427	c->retstack_ix = PL_retstack_ix;
428	c->retstack_max = PL_retstack_max;
429	#endif
430	c->curpm = PL_curpm;
431	c->curcop = PL_curcop;
432	c->top_env = PL_top_env;
433	}	392	}
434		393
435	/*	394	/*
436	* allocate various perl stacks. This is an exact copy	395	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	396	* of perl.c:init_stacks, except that it uses less memory
438	* on the (sometimes correct) assumption that coroutines do	397	* on the (sometimes correct) assumption that coroutines do
439	* not usually need a lot of stackspace.	398	* not usually need a lot of stackspace.
440	*/	399	*/
441	static void	400	static void
442	coro_init_stacks (pTHX)	401	coro_init_stacks ()
443	{	402	{
444	LOCK;
445
446	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	403	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
447	PL_curstackinfo->si_type = PERLSI_MAIN;	404	PL_curstackinfo->si_type = PERLSI_MAIN;
448	PL_curstack = PL_curstackinfo->si_stack;	405	PL_curstack = PL_curstackinfo->si_stack;
449	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	406	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
450		407
451	PL_stack_base = AvARRAY(PL_curstack);	408	PL_stack_base = AvARRAY(PL_curstack);
452	PL_stack_sp = PL_stack_base;	409	PL_stack_sp = PL_stack_base;
453	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	410	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
454		411
455	New(50,PL_tmps_stack,96,SV*);	412	New(50,PL_tmps_stack,128,SV*);
456	PL_tmps_floor = -1;	413	PL_tmps_floor = -1;
457	PL_tmps_ix = -1;	414	PL_tmps_ix = -1;
458	PL_tmps_max = 96;	415	PL_tmps_max = 128;
459		416
460	New(54,PL_markstack,16,I32);	417	New(54,PL_markstack,32,I32);
461	PL_markstack_ptr = PL_markstack;	418	PL_markstack_ptr = PL_markstack;
462	PL_markstack_max = PL_markstack + 16;	419	PL_markstack_max = PL_markstack + 32;
463		420
464	#ifdef SET_MARK_OFFSET	421	#ifdef SET_MARK_OFFSET
465	SET_MARK_OFFSET;	422	SET_MARK_OFFSET;
466	#endif	423	#endif
467		424
468	New(54,PL_scopestack,16,I32);	425	New(54,PL_scopestack,32,I32);
469	PL_scopestack_ix = 0;	426	PL_scopestack_ix = 0;
470	PL_scopestack_max = 16;	427	PL_scopestack_max = 32;
471		428
472	New(54,PL_savestack,96,ANY);	429	New(54,PL_savestack,64,ANY);
473	PL_savestack_ix = 0;	430	PL_savestack_ix = 0;
474	PL_savestack_max = 96;	431	PL_savestack_max = 64;
475		432
476	#if PERL_VERSION < 9	433	#if !PERL_VERSION_ATLEAST (5,9,0)
477	New(54,PL_retstack,8,OP*);	434	New(54,PL_retstack,16,OP*);
478	PL_retstack_ix = 0;	435	PL_retstack_ix = 0;
479	PL_retstack_max = 8;	436	PL_retstack_max = 16;
480	#endif	437	#endif
481
482	UNLOCK;
483	}	438	}
484		439
485	/*	440	/*
486	* destroy the stacks, the callchain etc...	441	* destroy the stacks, the callchain etc...
487	*/	442	*/
488	static void	443	static void
489	destroy_stacks(pTHX)	444	coro_destroy_stacks ()
490	{	445	{
491	if (!IN_DESTRUCT)	446	if (!IN_DESTRUCT)
492	{	447	{
493	/* is this ugly, I ask? */	448	/* is this ugly, I ask? */
494	LEAVE_SCOPE (0);	449	LEAVE_SCOPE (0);
…		…
525		480
526	Safefree (PL_tmps_stack);	481	Safefree (PL_tmps_stack);
527	Safefree (PL_markstack);	482	Safefree (PL_markstack);
528	Safefree (PL_scopestack);	483	Safefree (PL_scopestack);
529	Safefree (PL_savestack);	484	Safefree (PL_savestack);
530	#if PERL_VERSION < 9	485	#if !PERL_VERSION_ATLEAST (5,9,0)
531	Safefree (PL_retstack);	486	Safefree (PL_retstack);
532	#endif	487	#endif
533	}	488	}
534		489
535	static void	490	static void
536	allocate_stack (Coro__State ctx, int alloc)	491	setup_coro (struct coro *coro)
537	{
538	coro_stack *stack;
539
540	New (0, stack, 1, coro_stack);
541
542	stack->refcnt = 1;
543	stack->usecnt = 1;
544	stack->gencnt = ctx->gencnt = 0;
545
546	if (alloc)
547	{
548	#if HAVE_MMAP
549	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
551	if (stack->sptr != (void *)-1)
552	{
553	# if STACKGUARD
554	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
555	# endif
556	}
557	else
558	#endif
559	{
560	stack->ssize = - (STACKSIZE * (long)sizeof (long));
561	New (0, stack->sptr, STACKSIZE, long);
562	}
563	}
564	else
565	stack->sptr = 0;
566
567	ctx->stack = stack;
568	}
569
570	static void
571	deallocate_stack (Coro__State ctx)
572	{
573	coro_stack *stack = ctx->stack;
574
575	ctx->stack = 0;
576
577	if (stack)
578	{
579	if (!--stack->refcnt)
580	{
581	#ifdef HAVE_MMAP
582	if (stack->ssize > 0 && stack->sptr)
583	munmap (stack->sptr, stack->ssize);
584	else
585	#endif
586	Safefree (stack->sptr);
587
588	Safefree (stack);
589	}
590	else if (ctx->gencnt == stack->gencnt)
591	--stack->usecnt;
592	}
593	}
594
595	static void
596	setup_coro (void *arg)
597	{	492	{
598	/*	493	/*
599	* emulate part of the perl startup here.	494	* emulate part of the perl startup here.
600	*/	495	*/
601	dTHX;
602	dSP;
603	Coro__State ctx = (Coro__State)arg;
604	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
605		496
606	coro_init_stacks (aTHX);	497	coro_init_stacks ();
607	/PL_curcop = 0;/	498
608	/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
609	SvREFCNT_dec (GvAV (PL_defgv));	510	SvREFCNT_dec (GvAV (PL_defgv));
610	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	511	GvAV (PL_defgv) = coro->args; coro->args = 0;
611		512
612	SPAGAIN;
613
614	if (ctx->stack)
615	{
616	ctx->cursp = 0;
617
618	PUSHMARK(SP);
619	PUTBACK;
620	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
621
622	if (SvTRUE (ERRSV))
623	croak (NULL);
624	else
625	croak ("FATAL: CCTXT coroutine returned!");
626	}
627	else
628	{
629	UNOP myop;
630
631	Zero(&myop, 1, UNOP);	513	Zero (&myop, 1, LOGOP);
632	myop.op_next = Nullop;	514	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;	515	myop.op_flags = OPf_WANT_VOID;
634		516
		517	PUSHMARK (SP);
		518	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		519	PUTBACK;
635	PL_op = (OP *)&myop;	520	PL_op = (OP *)&myop;
636
637	PUSHMARK(SP);
638	XPUSHs (sub_init);
639	/*
640	* the next line is slightly wrong, as PL_op->op_next
641	* is actually being executed so we skip the first op.
642	* that doesn't matter, though, since it is only
643	* pp_nextstate and we never return...
644	* ah yes, and I don't care anyways ;)
645	*/
646	PUTBACK;
647	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	521	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
648	SPAGAIN;	522	SPAGAIN;
		523	}
649		524
650	ENTER; /* necessary e.g. for dounwind */	525	ENTER; /* necessary e.g. for dounwind */
651	}
652	}	526	}
653		527
654	static void	528	static void
655	continue_coro (void *arg)	529	free_coro_mortal ()
656	{	530	{
657	/*
658	* this is a _very_ stripped down perl interpreter ;)
659	*/
660	dTHX;
661	Coro__State ctx = (Coro__State)arg;
662
663	PL_top_env = &PL_start_env;
664
665	ctx->cursp = 0;
666	PL_op = PL_op->op_next;
667	CALLRUNOPS(aTHX);
668
669	abort ();
670	}
671
672	static void
673	transfer (pTHX_ struct coro prev, struct coro next, int flags)
674	{
675	dSTACKLEVEL;
676
677	if (prev != next)
678	{
679	/* has this coro been created yet? */
680	if (next->mainstack)
681	{
682	LOCK;
683	SAVE (prev, flags);
684	LOAD (next);
685	UNLOCK;
686
687	/* mark this state as in-use */
688	next->mainstack = 0;
689	next->tmps_ix = -2;
690
691	/* stacklevel changed? if yes, grab the stack for us! */
692	if (flags & TRANSFER_SAVE_CCTXT)
693	{
694	if (!prev->stack)
695	allocate_stack (prev, 0);
696	else if (prev->cursp != stacklevel
697	&& prev->stack->usecnt > 1)
698	{
699	prev->gencnt = ++prev->stack->gencnt;
700	prev->stack->usecnt = 1;
701	}
702
703	/* has our stack been invalidated? */
704	if (next->stack && next->stack->gencnt != next->gencnt)
705	{
706	deallocate_stack (next);
707	allocate_stack (next, 1);
708	coro_create (&(next->stack->cctx),
709	continue_coro, (void *)next,
710	next->stack->sptr, labs (next->stack->ssize));
711	}
712
713	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
714	prev->cursp = stacklevel;
715	/* don't add any code here */
716	}
717	else
718	next->cursp = stacklevel;
719	}
720	else if (next->tmps_ix == -2)
721	croak ("tried to transfer to running coroutine");
722	else
723	{
724	LOCK;
725	SAVE (prev, -1); /* first get rid of the old state */
726	UNLOCK;
727
728	/* create the coroutine for the first time */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733
734	/* the new coroutine starts with start_env again */
735	PL_top_env = &PL_start_env;
736
737	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
738	{
739	setup_coro (next);
740	next->cursp = stacklevel;
741
742	prev->stack->refcnt++;
743	prev->stack->usecnt++;
744	next->stack = prev->stack;
745	next->gencnt = prev->gencnt;
746	}
747	else
748	{
749	assert (!next->stack);
750	allocate_stack (next, 1);
751	coro_create (&(next->stack->cctx),
752	setup_coro, (void *)next,
753	next->stack->sptr, labs (next->stack->ssize));
754	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755	prev->cursp = stacklevel;
756	/* don't add any code here */
757	}
758	}
759	else
760	{
761	setup_coro (next);
762	next->cursp = stacklevel;
763	}
764	}
765	}
766
767	LOCK;
768	if (coro_mortal)	531	if (coro_mortal)
769	{	532	{
770	SvREFCNT_dec (coro_mortal);	533	SvREFCNT_dec (coro_mortal);
771	coro_mortal = 0;	534	coro_mortal = 0;
772	}	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. */
773	UNLOCK;	563	UNLOCK;
774	}
775		564
776	#define SV_CORO(sv,func) \	565	/*
777	do { \	566	* this is a _very_ stripped down perl interpreter ;)
778	if (SvROK (sv)) \	567	*/
779	sv = SvRV (sv); \	568	PL_top_env = &PL_start_env;
780	\
781	if (SvTYPE (sv) == SVt_PVHV) \
782	{ \
783	HE he = hv_fetch_ent ((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
784	\
785	if (!he) \
786	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787	\
788	(sv) = SvRV (HeVAL(he)); \
789	} \
790	\
791	/* must also be changed inside Coro::Cont::yield */ \
792	if (!SvOBJECT (sv) \|\| SvSTASH (sv) != coro_state_stash) \
793	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794	\
795	} while(0)
796		569
797	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	570	/* inject call to cctx_init */
		571	prepare_cctx ((coro_cctx *)arg);
798		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
799	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
800	api_transfer(pTHX_ SV prev, SV next, int flags)	876	api_transfer (SV prev, SV next, int flags)
801	{	877	{
802	SV_CORO (prev, "Coro::transfer");	878	struct transfer_args ta;
803	SV_CORO (next, "Coro::transfer");
804		879
805	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	880	prepare_transfer (&ta, prev, next, flags);
		881	TRANSFER (ta);
806	}	882	}
807		883
808	/ Coro ******************************************************************/	884	/ Coro ******************************************************************/
809		885
810	#define PRIO_MAX 3	886	#define PRIO_MAX 3
…		…
813	#define PRIO_LOW -1	889	#define PRIO_LOW -1
814	#define PRIO_IDLE -3	890	#define PRIO_IDLE -3
815	#define PRIO_MIN -4	891	#define PRIO_MIN -4
816		892
817	/* for Coro.pm */	893	/* for Coro.pm */
818	static GV coro_current, coro_idle;	894	static SV *coro_current;
819	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	895	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
820	static int coro_nready;	896	static int coro_nready;
821		897
822	static void	898	static void
823	coro_enq (pTHX_ SV *sv)	899	coro_enq (SV *coro_sv)
824	{	900	{
825	SV **xprio;
826	int prio;
827
828	if (SvTYPE (sv) != SVt_PVHV)
829	croak ("Coro::ready tried to enqueue something that is not a coroutine");
830
831	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
832	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
833
834	prio = prio > PRIO_MAX ? PRIO_MAX
835	: prio < PRIO_MIN ? PRIO_MIN
836	: prio;
837
838	av_push (coro_ready [prio - PRIO_MIN], sv);	901	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
839	coro_nready++;	902	coro_nready++;
840	}	903	}
841		904
842	static SV *	905	static SV *
843	coro_deq (pTHX_ int min_prio)	906	coro_deq (int min_prio)
844	{	907	{
845	int prio = PRIO_MAX - PRIO_MIN;	908	int prio = PRIO_MAX - PRIO_MIN;
846		909
847	min_prio -= PRIO_MIN;	910	min_prio -= PRIO_MIN;
848	if (min_prio < 0)	911	if (min_prio < 0)
849	min_prio = 0;	912	min_prio = 0;
850		913
851	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	914	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852	if (av_len (coro_ready[prio]) >= 0)	915	if (AvFILLp (coro_ready [prio]) >= 0)
853	{	916	{
854	coro_nready--;	917	coro_nready--;
855	return av_shift (coro_ready[prio]);	918	return av_shift (coro_ready [prio]);
856	}	919	}
857		920
858	return 0;	921	return 0;
859	}	922	}
860		923
861	static void	924	static int
862	api_ready (SV *coro)	925	api_ready (SV *coro_sv)
863	{	926	{
864	dTHX;	927	struct coro *coro;
865		928
866	if (SvROK (coro))	929	if (SvROK (coro_sv))
867	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;
868		943
869	LOCK;	944	LOCK;
870	coro_enq (aTHX_ SvREFCNT_inc (coro));	945	coro_enq (SvREFCNT_inc (coro_sv));
871	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);
872	}	1012	}
873		1013
874	static void	1014	static void
875	api_schedule (void)	1015	api_schedule (void)
876	{	1016	{
877	dTHX;	1017	struct transfer_args ta;
878		1018
879	SV prev, next;	1019	prepare_schedule (&ta);
880		1020	TRANSFER (ta);
881	LOCK;
882
883	prev = SvRV (GvSV (coro_current));
884	next = coro_deq (aTHX_ PRIO_MIN);
885
886	if (!next)
887	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
888
889	/* free this only after the transfer */
890	coro_mortal = prev;
891	SV_CORO (prev, "Coro::schedule");
892
893	SvRV (GvSV (coro_current)) = next;
894
895	SV_CORO (next, "Coro::schedule");
896
897	UNLOCK;
898
899	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
900	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
901	}	1021	}
902		1022
903	static void	1023	static void
904	api_cede (void)	1024	api_cede (void)
905	{	1025	{
906	dTHX;	1026	struct transfer_args ta;
907		1027
908	LOCK;	1028	prepare_cede (&ta);
909	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1029	TRANSFER (ta);
910	UNLOCK;
911
912	api_schedule ();
913	}	1030	}
914		1031
915	MODULE = Coro::State PACKAGE = Coro::State	1032	MODULE = Coro::State PACKAGE = Coro::State
916		1033
917	PROTOTYPES: ENABLE	1034	PROTOTYPES: DISABLE
918		1035
919	BOOT:	1036	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1037	{
921	#ifdef USE_ITHREADS	1038	#ifdef USE_ITHREADS
922	MUTEX_INIT (&coro_mutex);	1039	MUTEX_INIT (&coro_mutex);
923	#endif	1040	#endif
924	BOOT_PAGESIZE;	1041	BOOT_PAGESIZE;
925		1042
926	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
927	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
928	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1043	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929		1044
930	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1045	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
931	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1046	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
932	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1047	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
933	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
934		1048
935	main_mainstack = PL_mainstack;	1049	main_mainstack = PL_mainstack;
936		1050
937	coroapi.ver = CORO_API_VERSION;	1051	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1052	coroapi.transfer = api_transfer;
939	}
940		1053
941	Coro::State	1054	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1055	}
943	SV * args	1056
944	PROTOTYPE: $	1057	SV *
		1058	new (char *klass, ...)
945	CODE:	1059	CODE:
946	Coro__State coro;	1060	{
		1061	struct coro *coro;
		1062	HV *hv;
		1063	int i;
947		1064
948	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
949	croak ("Coro::State::_newprocess expects an arrayref");
950
951	Newz (0, coro, 1, struct coro);	1065	Newz (0, coro, 1, struct coro);
		1066	coro->args = newAV ();
		1067	coro->flags = CF_NEW;
952		1068
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1069	hv = newHV ();
954	/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;
955	/coro->stack = 0;/	1071	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
956		1072
957	RETVAL = coro;	1073	for (i = 1; i < items; i++)
		1074	av_push (coro->args, newSVsv (ST (i)));
		1075	}
958	OUTPUT:	1076	OUTPUT:
959	RETVAL	1077	RETVAL
960		1078
961	void	1079	void
962	transfer(prev, next, flags)	1080	_set_stacklevel (...)
963	SV *prev	1081	ALIAS:
964	SV *next	1082	Coro::State::transfer = 1
965	int flags	1083	Coro::schedule = 2
966	PROTOTYPE: @	1084	Coro::cede = 3
967	CODE:	1085	CODE:
968	PUTBACK;	1086	{
969	SV_CORO (next, "Coro::transfer");	1087	struct transfer_args ta;
970	SV_CORO (prev, "Coro::transfer");	1088
971	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1089	switch (ix)
972	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	}
973		1115
974	void	1116	void
975	DESTROY(coro)	1117	_clone_state_from (SV dst, SV src)
976	Coro::State coro	1118	CODE:
977	CODE:	1119	{
		1120	struct coro *coro_src = SvSTATE (src);
978		1121
979	if (coro->mainstack && coro->mainstack != main_mainstack)	1122	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
980	{
981	struct coro temp;
982		1123
983	PUTBACK;	1124	++coro_src->refcnt;
984	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;
985	LOAD (aTHX_ coro);	1126	}
986	SPAGAIN;
987
988	destroy_stacks (aTHX);
989
990	LOAD ((&temp)); /* this will get rid of defsv etc.. */
991	SPAGAIN;
992
993	coro->mainstack = 0;
994	}
995
996	deallocate_stack (coro);
997	SvREFCNT_dec (coro->args);
998	Safefree (coro);
999		1127
1000	void	1128	void
1001	_exit(code)	1129	_exit (code)
1002	int code	1130	int code
1003	PROTOTYPE: $	1131	PROTOTYPE: $
1004	CODE:	1132	CODE:
1005	_exit (code);	1133	_exit (code);
1006		1134
1007	MODULE = Coro::State PACKAGE = Coro::Cont	1135	int
		1136	cctx_count ()
		1137	CODE:
		1138	RETVAL = cctx_count;
		1139	OUTPUT:
		1140	RETVAL
1008		1141
1009	void	1142	int
1010	yield(...)	1143	cctx_idle ()
1011	PROTOTYPE: @	1144	CODE:
1012	CODE:	1145	RETVAL = cctx_idle;
1013	SV *yieldstack;	1146	OUTPUT:
1014	SV *sv;	1147	RETVAL
1015	AV *defav = GvAV (PL_defgv);
1016	struct coro prev, next;
1017
1018	yieldstack = *hv_fetch (
1019	(HV *)SvRV (GvSV (coro_current)),
1020	"yieldstack", sizeof ("yieldstack") - 1,
1021	0
1022	);
1023
1024	/* set up @_ -- ugly */
1025	av_clear (defav);
1026	av_fill (defav, items - 1);
1027	while (items--)
1028	av_store (defav, items, SvREFCNT_inc (ST(items)));
1029
1030	sv = av_pop ((AV *)SvRV (yieldstack));
1031	prev = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0))));
1032	next = INT2PTR (struct coro , SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0))));
1033	SvREFCNT_dec (sv);
1034
1035	transfer (aTHX_ prev, next, 0);
1036		1148
1037	MODULE = Coro::State PACKAGE = Coro	1149	MODULE = Coro::State PACKAGE = Coro
1038		1150
1039	BOOT:	1151	BOOT:
1040	{	1152	{
1041	int i;	1153	int i;
		1154
1042	HV *stash = gv_stashpv ("Coro", TRUE);	1155	coro_stash = gv_stashpv ("Coro", TRUE);
1043		1156
1044	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1157	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1045	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1158	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1046	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1159	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1047	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1160	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1048	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1161	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1049	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1162	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1050		1163
1051	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1164	coro_current = get_sv ("Coro::current", FALSE);
1052	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1165	SvREADONLY_on (coro_current);
1053		1166
1054	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1167	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1055	coro_ready[i] = newAV ();	1168	coro_ready[i] = newAV ();
1056		1169
1057	{	1170	{
1058	SV *sv = perl_get_sv("Coro::API", 1);	1171	SV *sv = perl_get_sv("Coro::API", 1);
1059		1172
1060	coroapi.schedule = api_schedule;	1173	coroapi.schedule = api_schedule;
1061	coroapi.cede = api_cede;	1174	coroapi.cede = api_cede;
1062	coroapi.ready = api_ready;	1175	coroapi.ready = api_ready;
		1176	coroapi.is_ready = api_is_ready;
1063	coroapi.nready = &coro_nready;	1177	coroapi.nready = &coro_nready;
1064	coroapi.current = coro_current;	1178	coroapi.current = coro_current;
1065		1179
1066	GCoroAPI = &coroapi;	1180	GCoroAPI = &coroapi;
1067	sv_setiv (sv, (IV)&coroapi);	1181	sv_setiv (sv, (IV)&coroapi);
1068	SvREADONLY_on (sv);	1182	SvREADONLY_on (sv);
1069	}	1183	}
1070	}	1184	}
1071		1185
1072	#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;
1073		1193
1074	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 *
1075	ready(self)	1207	ready (SV *self)
1076	SV * self
1077	PROTOTYPE: $	1208	PROTOTYPE: $
1078	CODE:	1209	CODE:
1079	api_ready (self);	1210	RETVAL = boolSV (api_ready (self));
		1211	OUTPUT:
		1212	RETVAL
1080		1213
1081	#endif	1214	SV *
		1215	is_ready (SV *self)
		1216	PROTOTYPE: $
		1217	CODE:
		1218	RETVAL = boolSV (api_is_ready (self));
		1219	OUTPUT:
		1220	RETVAL
1082		1221
1083	int	1222	int
1084	nready(...)	1223	nready (...)
1085	PROTOTYPE:	1224	PROTOTYPE:
1086	CODE:	1225	CODE:
1087	RETVAL = coro_nready;	1226	RETVAL = coro_nready;
1088	OUTPUT:	1227	OUTPUT:
1089	RETVAL	1228	RETVAL
1090		1229
1091	void	1230	void
1092	schedule(...)	1231	_set_current (SV *current)
1093	PROTOTYPE:	1232	PROTOTYPE: $
1094	CODE:	1233	CODE:
1095	api_schedule ();	1234	SvREFCNT_dec (SvRV (coro_current));
		1235	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1096		1236
1097	void	1237	MODULE = Coro::State PACKAGE = Coro::AIO
1098	cede(...)	1238
1099	PROTOTYPE:	1239	SV *
		1240	_get_state ()
1100	CODE:	1241	CODE:
1101	api_cede ();
1102
1103	# and these are hacks
1104	SV *
1105	_aio_get_state ()
1106	CODE:
1107	{	1242	{
1108	struct {	1243	struct io_state *data;
1109	int errorno;
1110	int laststype;
1111	int laststatval;
1112	Stat_t statcache;
1113	} data;
1114		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
1115	data.errorno = errno;	1250	data->errorno = errno;
1116	data.laststype = PL_laststype;	1251	data->laststype = PL_laststype;
1117	data.laststatval = PL_laststatval;	1252	data->laststatval = PL_laststatval;
1118	data.statcache = PL_statcache;	1253	data->statcache = PL_statcache;
1119
1120	RETVAL = newSVpvn ((char *)&data, sizeof data);
1121	}	1254	}
1122	OUTPUT:	1255	OUTPUT:
1123	RETVAL	1256	RETVAL
1124		1257
1125	void	1258	void
1126	_aio_set_state (char *data_)	1259	_set_state (char *data_)
1127	PROTOTYPE: $	1260	PROTOTYPE: $
1128	CODE:	1261	CODE:
1129	{	1262	{
1130	struct {	1263	struct io_state data = (void )data_;
1131	int errorno;
1132	int laststype;
1133	int laststatval;
1134	Stat_t statcache;
1135	} data = (void )data_;
1136		1264
1137	errno = data->errorno;	1265	errno = data->errorno;
1138	PL_laststype = data->laststype;	1266	PL_laststype = data->laststype;
1139	PL_laststatval = data->laststatval;	1267	PL_laststatval = data->laststatval;
1140	PL_statcache = data->statcache;	1268	PL_statcache = data->statcache;
1141	}	1269	}
		1270

Diff Legend

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

Comparing Coro/Coro/State.xs (file contents): Revision 1.81 by root, Fri Nov 3 00:56:03 2006 UTC vs. Revision 1.121 by root, Sat Dec 2 20:40:25 2006 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.81 by root, Fri Nov 3 00:56:03 2006 UTC vs.
Revision 1.121 by root, Sat Dec 2 20:40:25 2006 UTC