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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.92 by root, Sun Nov 26 02:16:19 2006 UTC vs.
Revision 1.122 by root, Mon Dec 4 13:47:56 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
54	# ifndef PAGESIZE	65	# ifndef PAGESIZE
55	# define PAGESIZE pagesize	66	# define PAGESIZE pagesize
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)	67	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;	68	static long pagesize;
58	# else	69	# else
59	# define BOOT_PAGESIZE	70	# define BOOT_PAGESIZE (void)0
60	# endif	71	# endif
		72	#else
		73	# define PAGESIZE 0
		74	# define BOOT_PAGESIZE (void)0
61	#endif	75	#endif
62		76
63	/* 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
64	* 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
65	* and should be unique. */	79	* and should be unique. */
66	#define dSTACKLEVEL int stacklevel	80	#define dSTACKLEVEL int stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	81	#define STACKLEVEL ((void *)&stacklevel)
68		82
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	83	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		84
71	#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))
72		92
73	#include "CoroAPI.h"	93	#include "CoroAPI.h"
74
75	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
76		94
77	#ifdef USE_ITHREADS	95	#ifdef USE_ITHREADS
78	static perl_mutex coro_mutex;	96	static perl_mutex coro_mutex;
79	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	97	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
80	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	98	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
81	#else	99	#else
82	# define LOCK (void)0	100	# define LOCK (void)0
83	# define UNLOCK (void)0	101	# define UNLOCK (void)0
84	#endif	102	#endif
85		103
		104	struct io_state
		105	{
		106	int errorno;
		107	I32 laststype;
		108	int laststatval;
		109	Stat_t statcache;
		110	};
		111
86	static struct CoroAPI coroapi;	112	static struct CoroAPI coroapi;
87	static AV main_mainstack; / used to differentiate between $main and others */	113	static AV main_mainstack; / used to differentiate between $main and others */
88	static HV coro_state_stash, coro_stash;	114	static HV coro_state_stash, coro_stash;
89	static SV coro_mortal; / will be freed after next transfer */	115	static SV coro_mortal; / will be freed after next transfer */
90		116
		117	static struct coro_cctx *cctx_first;
		118	static int cctx_count, cctx_idle;
		119
91	/* this is a structure representing a c-level coroutine */	120	/* this is a structure representing a c-level coroutine */
92	typedef struct coro_stack {	121	typedef struct coro_cctx {
93	struct coro_stack *next;	122	struct coro_cctx *next;
94		123
95	void idle_sp; / original stacklevel when coroutine was created */	124	/* the stack */
96	void *sptr;	125	void *sptr;
97	long ssize; /* positive == mmap, otherwise malloc */	126	long ssize; /* positive == mmap, otherwise malloc */
98		127
99	/* cpu state */	128	/* cpu state */
		129	void idle_sp; / sp of top-level transfer/schedule/cede call */
		130	JMPENV *top_env;
100	coro_context cctx;	131	coro_context cctx;
101	JMPENV *top_env;
102	} coro_stack;
103		132
104	/* the (fake) coro_stack representing the main program */	133	int inuse;
105	static coro_stack *main_stack;	134
		135	#if USE_VALGRIND
		136	int valgrind_id;
		137	#endif
		138	} coro_cctx;
		139
		140	enum {
		141	CF_RUNNING = 0x0001, /* coroutine is running */
		142	CF_READY = 0x0002, /* coroutine is ready */
		143	CF_NEW = 0x0004, /* ahs never been switched to */
		144	};
106		145
107	/* this is a structure representing a perl-level coroutine */	146	/* this is a structure representing a perl-level coroutine */
108	struct coro {	147	struct coro {
109	/* the c coroutine allocated to this perl coroutine, if any */	148	/* the c coroutine allocated to this perl coroutine, if any */
110	coro_stack *stack;	149	coro_cctx *cctx;
111		150
112	/* data associated with this coroutine (initial args) */	151	/* data associated with this coroutine (initial args) */
113	AV *args;	152	AV *args;
114	int refcnt;	153	int refcnt;
		154	int save; /* CORO_SAVE flags */
		155	int flags; /* CF_ flags */
115		156
116	/* optionally saved, might be zero */	157	/* optionally saved, might be zero */
117	AV *defav;	158	AV defav; / @_ */
118	SV *defsv;	159	SV defsv; / $_ */
119	SV *errsv;	160	SV errsv; / $@ */
		161	SV irssv; / $/ */
120		162
121	/* saved global state not related to stacks */	163	#define VAR(name,type) type name;
122	U8 dowarn;	164	# include "state.h"
123	I32 in_eval;	165	#undef VAR
124
125	/* the stacks and related info (callchain etc..) */
126	PERL_SI *curstackinfo;
127	AV *curstack;
128	AV *mainstack;
129	SV **stack_sp;
130	OP *op;
131	SV **curpad;
132	AV *comppad;
133	CV *compcv;
134	SV **stack_base;
135	SV **stack_max;
136	SV **tmps_stack;
137	I32 tmps_floor;
138	I32 tmps_ix;
139	I32 tmps_max;
140	I32 *markstack;
141	I32 *markstack_ptr;
142	I32 *markstack_max;
143	I32 *scopestack;
144	I32 scopestack_ix;
145	I32 scopestack_max;
146	ANY *savestack;
147	I32 savestack_ix;
148	I32 savestack_max;
149	OP **retstack;
150	I32 retstack_ix;
151	I32 retstack_max;
152	PMOP *curpm;
153	COP *curcop;
154		166
155	/* coro process data */	167	/* coro process data */
156	int prio;	168	int prio;
157	};	169	};
158		170
159	typedef struct coro *Coro__State;	171	typedef struct coro *Coro__State;
160	typedef struct coro *Coro__State_or_hashref;	172	typedef struct coro *Coro__State_or_hashref;
161		173
162	static AV *	174	static AV *
163	coro_clone_padlist (pTHX_ CV *cv)	175	coro_clone_padlist (CV *cv)
164	{	176	{
165	AV *padlist = CvPADLIST (cv);	177	AV *padlist = CvPADLIST (cv);
166	AV newpadlist, newpad;	178	AV newpadlist, newpad;
167		179
168	newpadlist = newAV ();	180	newpadlist = newAV ();
169	AvREAL_off (newpadlist);	181	AvREAL_off (newpadlist);
170	#if PERL_VERSION < 9	182	#if PERL_VERSION_ATLEAST (5,9,0)
		183	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		184	#else
171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	185	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
172	#else
173	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
174	#endif	186	#endif
175	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	187	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
176	--AvFILLp (padlist);	188	--AvFILLp (padlist);
177		189
178	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	190	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
180		192
181	return newpadlist;	193	return newpadlist;
182	}	194	}
183		195
184	static void	196	static void
185	free_padlist (pTHX_ AV *padlist)	197	free_padlist (AV *padlist)
186	{	198	{
187	/* may be during global destruction */	199	/* may be during global destruction */
188	if (SvREFCNT (padlist))	200	if (SvREFCNT (padlist))
189	{	201	{
190	I32 i = AvFILLp (padlist);	202	I32 i = AvFILLp (padlist);
…		…
211	AV *padlist;	223	AV *padlist;
212	AV av = (AV )mg->mg_obj;	224	AV av = (AV )mg->mg_obj;
213		225
214	/* casting is fun. */	226	/* casting is fun. */
215	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	227	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
216	free_padlist (aTHX_ padlist);	228	free_padlist (padlist);
217		229
218	SvREFCNT_dec (av);	230	SvREFCNT_dec (av);
219		231
220	return 0;	232	return 0;
221	}	233	}
222		234
223	#define PERL_MAGIC_coro PERL_MAGIC_ext	235	#define PERL_MAGIC_coro PERL_MAGIC_ext
224		236
225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	237	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
226		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
227	/* the next two functions merely cache the padlists */	246	/* the next two functions merely cache the padlists */
228	static void	247	static void
229	get_padlist (pTHX_ CV *cv)	248	get_padlist (CV *cv)
230	{	249	{
231	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	250	MAGIC *mg = CORO_MAGIC (cv);
		251	AV *av;
232		252
233	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	253	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
234	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	254	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
235	else	255	else
236	{	256	{
237	#if 0	257	#if 0
238	/* this should work - but it doesn't :( */	258	/* this is probably cleaner, but also slower? */
239	CV *cp = Perl_cv_clone (aTHX_ cv);	259	CV *cp = Perl_cv_clone (cv);
240	CvPADLIST (cv) = CvPADLIST (cp);	260	CvPADLIST (cv) = CvPADLIST (cp);
241	CvPADLIST (cp) = 0;	261	CvPADLIST (cp) = 0;
242	SvREFCNT_dec (cp);	262	SvREFCNT_dec (cp);
243	#else	263	#else
244	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	264	CvPADLIST (cv) = coro_clone_padlist (cv);
245	#endif	265	#endif
246	}	266	}
247	}	267	}
248		268
249	static void	269	static void
250	put_padlist (pTHX_ CV *cv)	270	put_padlist (CV *cv)
251	{	271	{
252	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	272	MAGIC *mg = CORO_MAGIC (cv);
		273	AV *av;
253		274
254	if (!mg)	275	if (!mg)
255	{	276	{
256	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	277	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
257	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	278	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
258	mg->mg_virtual = &vtbl_coro;	279	mg->mg_virtual = &vtbl_coro;
259	mg->mg_obj = (SV *)newAV ();	280	mg->mg_obj = (SV *)newAV ();
260	}	281	}
261		282
262	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);
263	}	289	}
264		290
265	#define SB do {	291	#define SB do {
266	#define SE } while (0)	292	#define SE } while (0)
267		293
268	#define LOAD(state) load_state(aTHX_ (state));
269	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
270
271	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	294	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
272		295
273	static void	296	static void
274	load_state(pTHX_ Coro__State c)	297	load_perl (Coro__State c)
275	{	298	{
276	PL_dowarn = c->dowarn;	299	#define VAR(name,type) PL_ ## name = c->name;
277	PL_in_eval = c->in_eval;	300	# include "state.h"
278		301	#undef VAR
279	PL_curstackinfo = c->curstackinfo;
280	PL_curstack = c->curstack;
281	PL_mainstack = c->mainstack;
282	PL_stack_sp = c->stack_sp;
283	PL_op = c->op;
284	PL_curpad = c->curpad;
285	PL_comppad = c->comppad;
286	PL_compcv = c->compcv;
287	PL_stack_base = c->stack_base;
288	PL_stack_max = c->stack_max;
289	PL_tmps_stack = c->tmps_stack;
290	PL_tmps_floor = c->tmps_floor;
291	PL_tmps_ix = c->tmps_ix;
292	PL_tmps_max = c->tmps_max;
293	PL_markstack = c->markstack;
294	PL_markstack_ptr = c->markstack_ptr;
295	PL_markstack_max = c->markstack_max;
296	PL_scopestack = c->scopestack;
297	PL_scopestack_ix = c->scopestack_ix;
298	PL_scopestack_max = c->scopestack_max;
299	PL_savestack = c->savestack;
300	PL_savestack_ix = c->savestack_ix;
301	PL_savestack_max = c->savestack_max;
302	#if PERL_VERSION < 9
303	PL_retstack = c->retstack;
304	PL_retstack_ix = c->retstack_ix;
305	PL_retstack_max = c->retstack_max;
306	#endif
307	PL_curpm = c->curpm;
308	PL_curcop = c->curcop;
309		302
310	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	303	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
311	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	304	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
312	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	305	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		306	if (c->irssv) REPLACE_SV (PL_rs , c->irssv);
313		307
314	{	308	{
315	dSP;	309	dSP;
316	CV *cv;	310	CV *cv;
317		311
318	/* now do the ugly restore mess */	312	/* now do the ugly restore mess */
319	while ((cv = (CV *)POPs))	313	while ((cv = (CV *)POPs))
320	{	314	{
321	AV padlist = (AV )POPs;
322
323	if (padlist)
324	{
325	put_padlist (aTHX_ cv); /* mark this padlist as available */	315	put_padlist (cv); /* mark this padlist as available */
326	CvPADLIST(cv) = padlist;	316	CvDEPTH (cv) = PTR2IV (POPs);
327	}	317	CvPADLIST (cv) = (AV *)POPs;
328
329	++CvDEPTH(cv);
330	}	318	}
331		319
332	PUTBACK;	320	PUTBACK;
333	}	321	}
334	}	322	}
335		323
336	static void	324	static void
337	save_state(pTHX_ Coro__State c, int flags)	325	save_perl (Coro__State c)
338	{	326	{
339	{	327	{
340	dSP;	328	dSP;
341	I32 cxix = cxstack_ix;	329	I32 cxix = cxstack_ix;
342	PERL_CONTEXT *ccstk = cxstack;	330	PERL_CONTEXT *ccstk = cxstack;
…		…
353	{	341	{
354	while (cxix >= 0)	342	while (cxix >= 0)
355	{	343	{
356	PERL_CONTEXT *cx = &ccstk[cxix--];	344	PERL_CONTEXT *cx = &ccstk[cxix--];
357		345
358	if (CxTYPE(cx) == CXt_SUB)	346	if (CxTYPE (cx) == CXt_SUB)
359	{	347	{
360	CV *cv = cx->blk_sub.cv;	348	CV *cv = cx->blk_sub.cv;
		349
361	if (CvDEPTH(cv))	350	if (CvDEPTH (cv))
362	{	351	{
363	EXTEND (SP, CvDEPTH(cv)*2);	352	EXTEND (SP, 3);
364		353
365	while (--CvDEPTH(cv))
366	{
367	/* this tells the restore code to increment CvDEPTH */
368	PUSHs (Nullsv);
369	PUSHs ((SV *)cv);
370	}
371
372	PUSHs ((SV *)CvPADLIST(cv));	354	PUSHs ((SV *)CvPADLIST (cv));
		355	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
373	PUSHs ((SV *)cv);	356	PUSHs ((SV *)cv);
374		357
		358	CvDEPTH (cv) = 0;
375	get_padlist (aTHX_ cv);	359	get_padlist (cv);
376	}	360	}
377	}	361	}
378	#ifdef CXt_FORMAT	362	#ifdef CXt_FORMAT
379	else if (CxTYPE(cx) == CXt_FORMAT)	363	else if (CxTYPE (cx) == CXt_FORMAT)
380	{	364	{
381	/* I never used formats, so how should I know how these are implemented? */	365	/* I never used formats, so how should I know how these are implemented? */
382	/* my bold guess is as a simple, plain sub... */	366	/* my bold guess is as a simple, plain sub... */
383	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	367	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
384	}	368	}
…		…
394	}	378	}
395		379
396	PUTBACK;	380	PUTBACK;
397	}	381	}
398		382
399	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	383	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
400	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	384	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
401	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	385	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		386	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
402		387
403	c->dowarn = PL_dowarn;	388	#define VAR(name,type)c->name = PL_ ## name;
404	c->in_eval = PL_in_eval;	389	# include "state.h"
405		390	#undef VAR
406	c->curstackinfo = PL_curstackinfo;
407	c->curstack = PL_curstack;
408	c->mainstack = PL_mainstack;
409	c->stack_sp = PL_stack_sp;
410	c->op = PL_op;
411	c->curpad = PL_curpad;
412	c->comppad = PL_comppad;
413	c->compcv = PL_compcv;
414	c->stack_base = PL_stack_base;
415	c->stack_max = PL_stack_max;
416	c->tmps_stack = PL_tmps_stack;
417	c->tmps_floor = PL_tmps_floor;
418	c->tmps_ix = PL_tmps_ix;
419	c->tmps_max = PL_tmps_max;
420	c->markstack = PL_markstack;
421	c->markstack_ptr = PL_markstack_ptr;
422	c->markstack_max = PL_markstack_max;
423	c->scopestack = PL_scopestack;
424	c->scopestack_ix = PL_scopestack_ix;
425	c->scopestack_max = PL_scopestack_max;
426	c->savestack = PL_savestack;
427	c->savestack_ix = PL_savestack_ix;
428	c->savestack_max = PL_savestack_max;
429	#if PERL_VERSION < 9
430	c->retstack = PL_retstack;
431	c->retstack_ix = PL_retstack_ix;
432	c->retstack_max = PL_retstack_max;
433	#endif
434	c->curpm = PL_curpm;
435	c->curcop = PL_curcop;
436	}	391	}
437		392
438	/*	393	/*
439	* allocate various perl stacks. This is an exact copy	394	* allocate various perl stacks. This is an exact copy
440	* of perl.c:init_stacks, except that it uses less memory	395	* of perl.c:init_stacks, except that it uses less memory
441	* on the (sometimes correct) assumption that coroutines do	396	* on the (sometimes correct) assumption that coroutines do
442	* not usually need a lot of stackspace.	397	* not usually need a lot of stackspace.
443	*/	398	*/
444	static void	399	static void
445	coro_init_stacks (pTHX)	400	coro_init_stacks ()
446	{	401	{
447	LOCK;
448
449	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	402	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
450	PL_curstackinfo->si_type = PERLSI_MAIN;	403	PL_curstackinfo->si_type = PERLSI_MAIN;
451	PL_curstack = PL_curstackinfo->si_stack;	404	PL_curstack = PL_curstackinfo->si_stack;
452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	405	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453		406
454	PL_stack_base = AvARRAY(PL_curstack);	407	PL_stack_base = AvARRAY(PL_curstack);
455	PL_stack_sp = PL_stack_base;	408	PL_stack_sp = PL_stack_base;
456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	409	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457		410
458	New(50,PL_tmps_stack,96,SV*);	411	New(50,PL_tmps_stack,128,SV*);
459	PL_tmps_floor = -1;	412	PL_tmps_floor = -1;
460	PL_tmps_ix = -1;	413	PL_tmps_ix = -1;
461	PL_tmps_max = 96;	414	PL_tmps_max = 128;
462		415
463	New(54,PL_markstack,16,I32);	416	New(54,PL_markstack,32,I32);
464	PL_markstack_ptr = PL_markstack;	417	PL_markstack_ptr = PL_markstack;
465	PL_markstack_max = PL_markstack + 16;	418	PL_markstack_max = PL_markstack + 32;
466		419
467	#ifdef SET_MARK_OFFSET	420	#ifdef SET_MARK_OFFSET
468	SET_MARK_OFFSET;	421	SET_MARK_OFFSET;
469	#endif	422	#endif
470		423
471	New(54,PL_scopestack,16,I32);	424	New(54,PL_scopestack,32,I32);
472	PL_scopestack_ix = 0;	425	PL_scopestack_ix = 0;
473	PL_scopestack_max = 16;	426	PL_scopestack_max = 32;
474		427
475	New(54,PL_savestack,96,ANY);	428	New(54,PL_savestack,64,ANY);
476	PL_savestack_ix = 0;	429	PL_savestack_ix = 0;
477	PL_savestack_max = 96;	430	PL_savestack_max = 64;
478		431
479	#if PERL_VERSION < 9	432	#if !PERL_VERSION_ATLEAST (5,9,0)
480	New(54,PL_retstack,8,OP*);	433	New(54,PL_retstack,16,OP*);
481	PL_retstack_ix = 0;	434	PL_retstack_ix = 0;
482	PL_retstack_max = 8;	435	PL_retstack_max = 16;
483	#endif	436	#endif
484
485	UNLOCK;
486	}	437	}
487		438
488	/*	439	/*
489	* destroy the stacks, the callchain etc...	440	* destroy the stacks, the callchain etc...
490	*/	441	*/
491	static void	442	static void
492	destroy_stacks(pTHX)	443	coro_destroy_stacks ()
493	{	444	{
494	if (!IN_DESTRUCT)	445	if (!IN_DESTRUCT)
495	{	446	{
496	/* is this ugly, I ask? */	447	/* is this ugly, I ask? */
497	LEAVE_SCOPE (0);	448	LEAVE_SCOPE (0);
…		…
528		479
529	Safefree (PL_tmps_stack);	480	Safefree (PL_tmps_stack);
530	Safefree (PL_markstack);	481	Safefree (PL_markstack);
531	Safefree (PL_scopestack);	482	Safefree (PL_scopestack);
532	Safefree (PL_savestack);	483	Safefree (PL_savestack);
533	#if PERL_VERSION < 9	484	#if !PERL_VERSION_ATLEAST (5,9,0)
534	Safefree (PL_retstack);	485	Safefree (PL_retstack);
535	#endif	486	#endif
536	}	487	}
537		488
538	static void	489	static void
539	setup_coro (struct coro *coro)	490	setup_coro (struct coro *coro)
540	{	491	{
541	/*	492	/*
542	* emulate part of the perl startup here.	493	* emulate part of the perl startup here.
543	*/	494	*/
544	dTHX;
545	dSP;
546	UNOP myop;
547	SV sub_init = (SV )get_cv ("Coro::State::coro_init", FALSE);
548		495
549	coro_init_stacks (aTHX);	496	coro_init_stacks ();
550	/PL_curcop = 0;/	497
551	/PL_in_eval = PL_in_eval;/ /* inherit */	498	PL_curcop = &PL_compiling;
		499	PL_in_eval = EVAL_NULL;
		500	PL_curpm = 0;
		501	PL_localizing = 0;
		502	PL_dirty = 0;
		503	PL_restartop = 0;
		504
		505	{
		506	dSP;
		507	LOGOP myop;
		508
552	SvREFCNT_dec (GvAV (PL_defgv));	509	SvREFCNT_dec (GvAV (PL_defgv));
553	GvAV (PL_defgv) = coro->args; coro->args = 0;	510	GvAV (PL_defgv) = coro->args; coro->args = 0;
554		511
555	SPAGAIN;
556
557	Zero (&myop, 1, UNOP);	512	Zero (&myop, 1, LOGOP);
558	myop.op_next = Nullop;	513	myop.op_next = Nullop;
559	myop.op_flags = OPf_WANT_VOID;	514	myop.op_flags = OPf_WANT_VOID;
560		515
		516	PUSHMARK (SP);
		517	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		518	PUTBACK;
561	PL_op = (OP *)&myop;	519	PL_op = (OP *)&myop;
562
563	PUSHMARK(SP);
564	XPUSHs (sub_init);
565	PUTBACK;
566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	520	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
567	SPAGAIN;	521	SPAGAIN;
		522	}
568		523
569	ENTER; /* necessary e.g. for dounwind */	524	ENTER; /* necessary e.g. for dounwind */
570	}	525	}
571		526
572	static void	527	static void
…		…
577	SvREFCNT_dec (coro_mortal);	532	SvREFCNT_dec (coro_mortal);
578	coro_mortal = 0;	533	coro_mortal = 0;
579	}	534	}
580	}	535	}
581		536
		537	/* inject a fake call to Coro::State::_cctx_init into the execution */
		538	static void NOINLINE
		539	prepare_cctx (coro_cctx *cctx)
		540	{
		541	dSP;
		542	LOGOP myop;
		543
		544	Zero (&myop, 1, LOGOP);
		545	myop.op_next = PL_op;
		546	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		547
		548	PUSHMARK (SP);
		549	EXTEND (SP, 2);
		550	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		551	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		552	PUTBACK;
		553	PL_op = (OP *)&myop;
		554	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		555	SPAGAIN;
		556	}
		557
582	static void	558	static void
583	coro_run (void *arg)	559	coro_run (void *arg)
584	{	560	{
		561	/* coro_run is the alternative tail of transfer(), so unlock here. */
		562	UNLOCK;
		563
585	/*	564	/*
586	* this is a _very_ stripped down perl interpreter ;)	565	* this is a _very_ stripped down perl interpreter ;)
587	*/	566	*/
588	dTHX;
589	PL_top_env = &PL_start_env;	567	PL_top_env = &PL_start_env;
590		568
591	UNLOCK;	569	/* inject call to cctx_init */
		570	prepare_cctx ((coro_cctx *)arg);
592		571
593	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
594	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
595	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
596
597	/* somebody will hit me for both perl_run and PL_restart_op */	572	/* somebody will hit me for both perl_run and PL_restartop */
598	perl_run (aTHX_ PERL_GET_CONTEXT);	573	PL_restartop = PL_op;
		574	perl_run (PL_curinterp);
599		575
		576	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
600	abort ();	577	abort ();
601	}	578	}
602		579
603	static coro_stack *	580	static coro_cctx *
604	stack_new ()	581	cctx_new ()
605	{	582	{
606	coro_stack *stack;	583	coro_cctx *cctx;
607		584
		585	++cctx_count;
		586
608	New (0, stack, 1, coro_stack);	587	New (0, cctx, 1, coro_cctx);
609		588
610	#if HAVE_MMAP	589	#if HAVE_MMAP
611		590
612	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	591	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		592	/* mmap supposedly does allocate-on-write for us */
613	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);	593	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
614		594
615	if (stack->sptr == (void *)-1)	595	if (cctx->sptr == (void *)-1)
616	{	596	{
617	perror ("FATAL: unable to mmap stack for coroutine");	597	perror ("FATAL: unable to mmap stack for coroutine");
618	_exit (EXIT_FAILURE);	598	_exit (EXIT_FAILURE);
619	}	599	}
620		600
		601	# if STACKGUARD
621	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	602	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		603	# endif
622		604
623	#else	605	#else
624		606
625	stack->ssize = STACKSIZE * (long)sizeof (long);	607	cctx->ssize = STACKSIZE * (long)sizeof (long);
626	New (0, stack->sptr, STACKSIZE, long);	608	New (0, cctx->sptr, STACKSIZE, long);
627		609
628	if (!stack->sptr)	610	if (!cctx->sptr)
629	{	611	{
630	perror (stderr, "FATAL: unable to malloc stack for coroutine");	612	perror ("FATAL: unable to malloc stack for coroutine");
631	_exit (EXIT_FAILURE);	613	_exit (EXIT_FAILURE);
632	}	614	}
633		615
634	#endif	616	#endif
635		617
		618	#if USE_VALGRIND
		619	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		620	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		621	cctx->ssize + (char *)cctx->sptr
		622	);
		623	#endif
		624
636	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	625	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
637		626
638	return stack;	627	return cctx;
639	}	628	}
640		629
641	static void	630	static void
642	stack_free (coro_stack *stack)	631	cctx_destroy (coro_cctx *cctx)
643	{	632	{
644	if (!stack \|\| stack == main_stack)	633	if (!cctx)
645	return;	634	return;
646		635
		636	--cctx_count;
		637
		638	#if USE_VALGRIND
		639	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		640	#endif
		641
647	#if HAVE_MMAP	642	#if HAVE_MMAP
648	munmap (stack->sptr, stack->ssize);	643	munmap (cctx->sptr, cctx->ssize);
649	#else	644	#else
650	Safefree (stack->sptr);	645	Safefree (cctx->sptr);
651	#endif	646	#endif
652		647
653	Safefree (stack);	648	Safefree (cctx);
654	}	649	}
655		650
656	static coro_stack *stack_first;
657
658	static coro_stack *	651	static coro_cctx *
659	stack_get ()	652	cctx_get ()
660	{	653	{
661	coro_stack *stack;	654	coro_cctx *cctx;
662		655
663	if (stack_first)	656	if (cctx_first)
664	{	657	{
665	stack = stack_first;	658	cctx = cctx_first;
666	stack_first = stack->next;	659	cctx_first = cctx->next;
		660	--cctx_idle;
667	}	661	}
668	else	662	else
669	{	663	{
670	stack = stack_new ();	664	cctx = cctx_new ();
671	PL_op = PL_op->op_next;	665	PL_op = PL_op->op_next;
672	}	666	}
673		667
674	return stack;	668	return cctx;
675	}	669	}
676		670
677	static void	671	static void
678	stack_put (coro_stack *stack)	672	cctx_put (coro_cctx *cctx)
679	{	673	{
680	stack->next = stack_first;	674	/* free another cctx if overlimit */
681	stack_first = stack;	675	if (cctx_idle >= MAX_IDLE_CCTX)
		676	{
		677	coro_cctx *first = cctx_first;
		678	cctx_first = first->next;
		679	--cctx_idle;
		680
		681	assert (!first->inuse);
		682	cctx_destroy (first);
		683	}
		684
		685	++cctx_idle;
		686	cctx->next = cctx_first;
		687	cctx_first = cctx;
682	}	688	}
683		689
684	/* never call directly, always through the coro_state_transfer global variable */	690	/* never call directly, always through the coro_state_transfer global variable */
685	static void	691	static void NOINLINE
686	transfer_impl (pTHX_ struct coro prev, struct coro next, int flags)	692	transfer (struct coro prev, struct coro next)
687	{	693	{
688	dSTACKLEVEL;	694	dSTACKLEVEL;
689		695
690	/* sometimes transfer is only called to set idle_sp */	696	/* sometimes transfer is only called to set idle_sp */
691	if (flags == TRANSFER_SET_STACKLEVEL)	697	if (!next)
692	((coro_stack *)prev)->idle_sp = STACKLEVEL;	698	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
693	else if (prev != next)	699	else if (prev != next)
694	{	700	{
695	coro_stack *prev__stack;	701	coro_cctx *prev__cctx;
		702
		703	if (prev->flags & CF_NEW)
		704	{
		705	/* create a new empty context */
		706	Newz (0, prev->cctx, 1, coro_cctx);
		707	prev->cctx->inuse = 1;
		708	prev->flags &= ~CF_NEW;
		709	prev->flags \|= CF_RUNNING;
		710	}
		711
		712	/TODO: must not croak here /
		713	if (!prev->flags & CF_RUNNING)
		714	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		715
		716	if (next->flags & CF_RUNNING)
		717	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		718
		719	prev->flags &= ~CF_RUNNING;
		720	next->flags \|= CF_RUNNING;
696		721
697	LOCK;	722	LOCK;
698		723
699	if (next->mainstack)	724	if (next->flags & CF_NEW)
700	{	725	{
701	/* coroutine already started */	726	/* need to start coroutine */
702	SAVE (prev, flags);	727	next->flags &= ~CF_NEW;
703	LOAD (next);	728	/* first get rid of the old state */
		729	save_perl (prev);
		730	/* setup coroutine call */
		731	setup_coro (next);
		732	/* need a new stack */
		733	assert (!next->stack);
704	}	734	}
705	else	735	else
706	{	736	{
707	/* need to start coroutine */	737	/* coroutine already started */
708	/* first get rid of the old state */	738	save_perl (prev);
709	SAVE (prev, -1);	739	load_perl (next);
710	/* setup coroutine call */
711	setup_coro (next);
712	/* need a stack */
713	next->stack = 0;
714	}	740	}
715		741
716	prev__stack = prev->stack;	742	prev__cctx = prev->cctx;
717		743
718	/* possibly "free" the stack */	744	/* possibly "free" the cctx */
719	if (prev__stack->idle_sp == STACKLEVEL)	745	if (prev__cctx->idle_sp == STACKLEVEL)
720	{	746	{
721	stack_put (prev__stack);	747	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		748	assert (PL_top_env == prev__cctx->top_env);
		749
722	prev->stack = 0;	750	prev->cctx = 0;
		751
		752	cctx_put (prev__cctx);
		753	prev__cctx->inuse = 0;
723	}	754	}
724		755
725	if (!next->stack)	756	if (!next->cctx)
726	next->stack = stack_get ();
727
728	if (prev__stack != next->stack)
729	{	757	{
		758	next->cctx = cctx_get ();
		759	assert (!next->cctx->inuse);
		760	next->cctx->inuse = 1;
		761	}
		762
		763	if (prev__cctx != next->cctx)
		764	{
730	prev__stack->top_env = PL_top_env;	765	prev__cctx->top_env = PL_top_env;
731	PL_top_env = next->stack->top_env;	766	PL_top_env = next->cctx->top_env;
732	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	767	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
733	}	768	}
734		769
735	free_coro_mortal ();	770	free_coro_mortal ();
736		771
737	UNLOCK;	772	UNLOCK;
738	}	773	}
739	}	774	}
740		775
741	/* use this function pointer to call the above function */
742	/* this is done to increase chances of the compiler not inlining the call */
743	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
744	void (coro_state_transfer)(pTHX_ struct coro prev, struct coro *next, int flags) = transfer_impl;
745
746	struct transfer_args	776	struct transfer_args
747	{	777	{
748	struct coro prev, next;	778	struct coro prev, next;
749	int flags;
750	};	779	};
751		780
752	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	781	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
753		782
754	static void	783	static void
755	coro_state_destroy (struct coro *coro)	784	coro_state_destroy (struct coro *coro)
756	{	785	{
757	if (coro->refcnt--)	786	if (coro->refcnt--)
758	return;	787	return;
759		788
760	if (coro->mainstack && coro->mainstack != main_mainstack)	789	if (coro->mainstack && coro->mainstack != main_mainstack)
761	{	790	{
762	struct coro temp;	791	struct coro temp;
		792	Zero (&temp, 1, struct coro);
		793	temp.save = CORO_SAVE_ALL;
763		794
764	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	795	if (coro->flags & CF_RUNNING)
765	LOAD (aTHX_ coro);	796	croak ("FATAL: tried to destroy currently running coroutine");
766		797
		798	save_perl (&temp);
		799	load_perl (coro);
		800
767	destroy_stacks (aTHX);	801	coro_destroy_stacks ();
768		802
769	LOAD ((&temp)); /* this will get rid of defsv etc.. */	803	load_perl (&temp); /* this will get rid of defsv etc.. */
770		804
771	coro->mainstack = 0;	805	coro->mainstack = 0;
772	}	806	}
773		807
774	stack_free (coro->stack);	808	cctx_destroy (coro->cctx);
775	SvREFCNT_dec (coro->args);	809	SvREFCNT_dec (coro->args);
776	Safefree (coro);	810	Safefree (coro);
777	}	811	}
778		812
779	static int	813	static int
780	coro_state_clear (SV sv, MAGIC mg)	814	coro_state_clear (pTHX_ SV sv, MAGIC mg)
781	{	815	{
782	struct coro coro = (struct coro )mg->mg_ptr;	816	struct coro coro = (struct coro )mg->mg_ptr;
783	mg->mg_ptr = 0;	817	mg->mg_ptr = 0;
784		818
785	coro_state_destroy (coro);	819	coro_state_destroy (coro);
786		820
787	return 0;	821	return 0;
788	}	822	}
789		823
790	static int	824	static int
791	coro_state_dup (MAGIC mg, CLONE_PARAMS params)	825	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
792	{	826	{
793	struct coro coro = (struct coro )mg->mg_ptr;	827	struct coro coro = (struct coro )mg->mg_ptr;
794		828
795	++coro->refcnt;	829	++coro->refcnt;
796		830
797	return 0;	831	return 0;
798	}	832	}
799		833
800	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	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	};
801		844
802	static struct coro *	845	static struct coro *
803	SvSTATE (SV *coro)	846	SvSTATE (SV *coro)
804	{	847	{
805	HV *stash;	848	HV *stash;
…		…
820	assert (mg->mg_type == PERL_MAGIC_ext);	863	assert (mg->mg_type == PERL_MAGIC_ext);
821	return (struct coro *)mg->mg_ptr;	864	return (struct coro *)mg->mg_ptr;
822	}	865	}
823		866
824	static void	867	static void
825	prepare_transfer (pTHX_ struct transfer_args ta, SV prev, SV *next, int flags)	868	prepare_transfer (struct transfer_args ta, SV prev_sv, SV *next_sv)
826	{	869	{
827	ta->prev = SvSTATE (prev);	870	ta->prev = SvSTATE (prev_sv);
828	ta->next = SvSTATE (next);	871	ta->next = SvSTATE (next_sv);
829	ta->flags = flags;
830	}	872	}
831		873
832	static void	874	static void
833	api_transfer (SV prev, SV next, int flags)	875	api_transfer (SV prev_sv, SV next_sv)
834	{	876	{
835	dTHX;
836	struct transfer_args ta;	877	struct transfer_args ta;
837		878
838	prepare_transfer (aTHX_ &ta, prev, next, flags);	879	prepare_transfer (&ta, prev_sv, next_sv);
839	TRANSFER (ta);	880	TRANSFER (ta);
		881	}
		882
		883	static int
		884	api_save (SV *coro_sv, int new_save)
		885	{
		886	struct coro *coro = SvSTATE (coro_sv);
		887	int old_save = coro->save;
		888
		889	if (new_save >= 0)
		890	coro->save = new_save;
		891
		892	return old_save;
840	}	893	}
841		894
842	/ Coro ******************************************************************/	895	/ Coro ******************************************************************/
843		896
844	#define PRIO_MAX 3	897	#define PRIO_MAX 3
…		…
847	#define PRIO_LOW -1	900	#define PRIO_LOW -1
848	#define PRIO_IDLE -3	901	#define PRIO_IDLE -3
849	#define PRIO_MIN -4	902	#define PRIO_MIN -4
850		903
851	/* for Coro.pm */	904	/* for Coro.pm */
852	static GV coro_current, coro_idle;	905	static SV *coro_current;
853	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	906	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
854	static int coro_nready;	907	static int coro_nready;
855		908
856	static void	909	static void
857	coro_enq (pTHX_ SV *sv)	910	coro_enq (SV *coro_sv)
858	{	911	{
859	int prio;
860
861	if (SvTYPE (sv) != SVt_PVHV)
862	croak ("Coro::ready tried to enqueue something that is not a coroutine");
863
864	prio = SvSTATE (sv)->prio;
865
866	av_push (coro_ready [prio - PRIO_MIN], sv);	912	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
867	coro_nready++;	913	coro_nready++;
868	}	914	}
869		915
870	static SV *	916	static SV *
871	coro_deq (pTHX_ int min_prio)	917	coro_deq (int min_prio)
872	{	918	{
873	int prio = PRIO_MAX - PRIO_MIN;	919	int prio = PRIO_MAX - PRIO_MIN;
874		920
875	min_prio -= PRIO_MIN;	921	min_prio -= PRIO_MIN;
876	if (min_prio < 0)	922	if (min_prio < 0)
…		…
884	}	930	}
885		931
886	return 0;	932	return 0;
887	}	933	}
888		934
889	static void	935	static int
890	api_ready (SV *coro)	936	api_ready (SV *coro_sv)
891	{	937	{
892	dTHX;	938	struct coro *coro;
893		939
894	if (SvROK (coro))	940	if (SvROK (coro_sv))
895	coro = SvRV (coro);	941	coro_sv = SvRV (coro_sv);
		942
		943	coro = SvSTATE (coro_sv);
		944
		945	if (coro->flags & CF_READY)
		946	return 0;
		947
		948	#if 0 /* this is actually harmless */
		949	if (coro->flags & CF_RUNNING)
		950	croak ("Coro::ready called on currently running coroutine");
		951	#endif
		952
		953	coro->flags \|= CF_READY;
896		954
897	LOCK;	955	LOCK;
898	coro_enq (aTHX_ SvREFCNT_inc (coro));	956	coro_enq (SvREFCNT_inc (coro_sv));
899	UNLOCK;	957	UNLOCK;
900	}
901		958
		959	return 1;
		960	}
		961
902	static void	962	static int
		963	api_is_ready (SV *coro_sv)
		964	{
		965	return !!SvSTATE (coro_sv)->flags & CF_READY;
		966	}
		967
		968	static void
903	prepare_schedule (aTHX_ struct transfer_args *ta)	969	prepare_schedule (struct transfer_args *ta)
904	{	970	{
905	SV current, prev, *next;	971	SV prev, next;
906
907	LOCK;
908
909	current = GvSV (coro_current);
910		972
911	for (;;)	973	for (;;)
912	{	974	{
913	LOCK;	975	LOCK;
914
915	next = coro_deq (aTHX_ PRIO_MIN);	976	next = coro_deq (PRIO_MIN);
		977	UNLOCK;
916		978
917	if (next)	979	if (next)
918	break;	980	break;
919		981
920	UNLOCK;
921
922	{	982	{
923	dSP;	983	dSP;
924		984
925	ENTER;	985	ENTER;
926	SAVETMPS;	986	SAVETMPS;
927		987
928	PUSHMARK (SP);	988	PUSHMARK (SP);
929	PUTBACK;	989	PUTBACK;
930	call_sv (GvSV (coro_idle), G_DISCARD);	990	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
931		991
932	FREETMPS;	992	FREETMPS;
933	LEAVE;	993	LEAVE;
934	}	994	}
935	}	995	}
936		996
937	prev = SvRV (current);	997	prev = SvRV (coro_current);
938	SvRV (current) = next;	998	SvRV_set (coro_current, next);
939		999
940	/* free this only after the transfer */	1000	/* free this only after the transfer */
		1001	LOCK;
941	free_coro_mortal ();	1002	free_coro_mortal ();
		1003	UNLOCK;
942	coro_mortal = prev;	1004	coro_mortal = prev;
943		1005
		1006	assert (!SvROK(prev));//D
		1007	assert (!SvROK(next));//D
		1008
944	ta->prev = SvSTATE (prev);	1009	ta->prev = SvSTATE (prev);
945	ta->next = SvSTATE (next);	1010	ta->next = SvSTATE (next);
946	ta->flags = TRANSFER_SAVE_ALL;
947		1011
948	UNLOCK;	1012	assert (ta->next->flags & CF_READY);
		1013	ta->next->flags &= ~CF_READY;
949	}	1014	}
950		1015
951	static void	1016	static void
952	prepare_cede (aTHX_ struct transfer_args *ta)	1017	prepare_cede (struct transfer_args *ta)
953	{	1018	{
954	LOCK;	1019	api_ready (coro_current);
955	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
956	UNLOCK;
957		1020
958	prepare_schedule (ta);	1021	prepare_schedule (ta);
959	}	1022	}
960		1023
961	static void	1024	static void
962	api_schedule (void)	1025	api_schedule (void)
963	{	1026	{
964	dTHX;
965	struct transfer_args ta;	1027	struct transfer_args ta;
966		1028
967	prepare_schedule (&ta);	1029	prepare_schedule (&ta);
968	TRANSFER (ta);	1030	TRANSFER (ta);
969	}	1031	}
970		1032
971	static void	1033	static void
972	api_cede (void)	1034	api_cede (void)
973	{	1035	{
974	dTHX;
975	struct transfer_args ta;	1036	struct transfer_args ta;
976		1037
977	prepare_cede (&ta);	1038	prepare_cede (&ta);
978	TRANSFER (ta);	1039	TRANSFER (ta);
979	}	1040	}
…		…
989	#endif	1050	#endif
990	BOOT_PAGESIZE;	1051	BOOT_PAGESIZE;
991		1052
992	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1053	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
993		1054
994	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1055	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
995	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1056	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
996	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1057	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1058	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1059	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
997		1060
998	main_mainstack = PL_mainstack;	1061	main_mainstack = PL_mainstack;
999		1062
1000	coroapi.ver = CORO_API_VERSION;	1063	coroapi.ver = CORO_API_VERSION;
1001	coroapi.transfer = api_transfer;	1064	coroapi.transfer = api_transfer;
1002
1003	Newz (0, main_stack, 1, coro_stack);
1004	main_stack->idle_sp = (void *)-1;
1005		1065
1006	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1066	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1007	}	1067	}
1008		1068
1009	SV *	1069	SV *
…		…
1014	HV *hv;	1074	HV *hv;
1015	int i;	1075	int i;
1016		1076
1017	Newz (0, coro, 1, struct coro);	1077	Newz (0, coro, 1, struct coro);
1018	coro->args = newAV ();	1078	coro->args = newAV ();
		1079	coro->save = CORO_SAVE_ALL;
		1080	coro->flags = CF_NEW;
1019		1081
1020	hv = newHV ();	1082	hv = newHV ();
1021	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;	1083	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
1022	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1084	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1023		1085
1024	for (i = 1; i < items; i++)	1086	for (i = 1; i < items; i++)
1025	av_push (coro->args, newSVsv (ST (i)));	1087	av_push (coro->args, newSVsv (ST (i)));
1026
1027	coro->stack = main_stack;
1028	/coro->mainstack = 0; //actual work is done inside transfer /
1029	/coro->stack = 0;/
1030	}	1088	}
1031	OUTPUT:	1089	OUTPUT:
1032	RETVAL	1090	RETVAL
1033		1091
		1092	int
		1093	save (SV *coro, int new_save = -1)
		1094	CODE:
		1095	RETVAL = api_save (coro, new_save);
		1096	OUTPUT:
		1097	RETVAL
		1098
1034	void	1099	void
1035	transfer (...)	1100	_set_stacklevel (...)
1036	ALIAS:	1101	ALIAS:
1037	Coro::schedule = 1	1102	Coro::State::transfer = 1
1038	Coro::cede = 2	1103	Coro::schedule = 2
1039	_set_stacklevel = 3	1104	Coro::cede = 3
1040	CODE:	1105	CODE:
1041	{	1106	{
1042	struct transfer_args ta;	1107	struct transfer_args ta;
1043		1108
1044	switch (ix)	1109	switch (ix)
1045	{	1110	{
1046	case 0:	1111	case 0:
1047	if (items != 3)	1112	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
1048	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1113	ta.next = 0;
1049
1050	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1051	break;	1114	break;
1052		1115
1053	case 1:	1116	case 1:
		1117	if (items != 2)
		1118	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1119
		1120	prepare_transfer (&ta, ST (0), ST (1));
		1121	break;
		1122
		1123	case 2:
1054	prepare_schedule (&ta);	1124	prepare_schedule (&ta);
1055	break;	1125	break;
1056		1126
1057	case 2:	1127	case 3:
1058	prepare_cede (&ta);	1128	prepare_cede (&ta);
1059	break;
1060
1061	case 3:
1062	ta.prev = (struct coro )INT2PTR (coro_stack , SvIV (ST (0)));
1063	ta.next = 0;
1064	ta.flags = TRANSFER_SET_STACKLEVEL;
1065	break;	1129	break;
1066	}	1130	}
1067		1131
1068	TRANSFER (ta);	1132	TRANSFER (ta);
1069	}	1133	}
…		…
1077	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);	1141	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1078		1142
1079	++coro_src->refcnt;	1143	++coro_src->refcnt;
1080	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;	1144	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags \|= MGf_DUP;
1081	}	1145	}
1082
1083	void
1084	_nonlocal_goto (IV nextop)
1085	CODE:
1086	/* uuh, somebody will kill me again for this */
1087	PL_op->op_next = INT2PTR (OP *, nextop);
1088		1146
1089	void	1147	void
1090	_exit (code)	1148	_exit (code)
1091	int code	1149	int code
1092	PROTOTYPE: $	1150	PROTOTYPE: $
1093	CODE:	1151	CODE:
1094	_exit (code);	1152	_exit (code);
1095		1153
1096	MODULE = Coro::State PACKAGE = Coro::Cont	1154	int
		1155	cctx_count ()
		1156	CODE:
		1157	RETVAL = cctx_count;
		1158	OUTPUT:
		1159	RETVAL
1097		1160
1098	void	1161	int
1099	yield (...)	1162	cctx_idle ()
1100	PROTOTYPE: @	1163	CODE:
1101	CODE:	1164	RETVAL = cctx_idle;
1102	{	1165	OUTPUT:
1103	SV *yieldstack;	1166	RETVAL
1104	SV *sv;
1105	AV *defav = GvAV (PL_defgv);
1106	struct coro prev, next;
1107
1108	yieldstack = *hv_fetch (
1109	(HV *)SvRV (GvSV (coro_current)),
1110	"yieldstack", sizeof ("yieldstack") - 1,
1111	0
1112	);
1113
1114	/* set up @_ -- ugly */
1115	av_clear (defav);
1116	av_fill (defav, items - 1);
1117	while (items--)
1118	av_store (defav, items, SvREFCNT_inc (ST(items)));
1119
1120	sv = av_pop ((AV *)SvRV (yieldstack));
1121	prev = SvSTATE (av_fetch ((AV )SvRV (sv), 0, 0));
1122	next = SvSTATE (av_fetch ((AV )SvRV (sv), 1, 0));
1123	SvREFCNT_dec (sv);
1124
1125	coro_state_transfer (aTHX_ prev, next, 0);
1126	}
1127		1167
1128	MODULE = Coro::State PACKAGE = Coro	1168	MODULE = Coro::State PACKAGE = Coro
1129		1169
1130	BOOT:	1170	BOOT:
1131	{	1171	{
…		…
1138	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1178	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1139	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1179	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1140	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1180	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1141	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1181	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1142		1182
1143	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1183	coro_current = get_sv ("Coro::current", FALSE);
1144	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1184	SvREADONLY_on (coro_current);
1145		1185
1146	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1186	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1147	coro_ready[i] = newAV ();	1187	coro_ready[i] = newAV ();
1148		1188
1149	{	1189	{
1150	SV *sv = perl_get_sv("Coro::API", 1);	1190	SV *sv = perl_get_sv("Coro::API", 1);
1151		1191
1152	coroapi.schedule = api_schedule;	1192	coroapi.schedule = api_schedule;
		1193	coroapi.save = api_save;
1153	coroapi.cede = api_cede;	1194	coroapi.cede = api_cede;
1154	coroapi.ready = api_ready;	1195	coroapi.ready = api_ready;
		1196	coroapi.is_ready = api_is_ready;
1155	coroapi.nready = &coro_nready;	1197	coroapi.nready = &coro_nready;
1156	coroapi.current = coro_current;	1198	coroapi.current = coro_current;
1157		1199
1158	GCoroAPI = &coroapi;	1200	GCoroAPI = &coroapi;
1159	sv_setiv (sv, (IV)&coroapi);	1201	sv_setiv (sv, (IV)&coroapi);
1160	SvREADONLY_on (sv);	1202	SvREADONLY_on (sv);
1161	}	1203	}
1162	}	1204	}
		1205
		1206	void
		1207	_set_current (SV *current)
		1208	PROTOTYPE: $
		1209	CODE:
		1210	SvREFCNT_dec (SvRV (coro_current));
		1211	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1163		1212
1164	int	1213	int
1165	prio (Coro::State coro, int newprio = 0)	1214	prio (Coro::State coro, int newprio = 0)
1166	ALIAS:	1215	ALIAS:
1167	nice = 1	1216	nice = 1
…		…
1179		1228
1180	coro->prio = newprio;	1229	coro->prio = newprio;
1181	}	1230	}
1182	}	1231	}
1183		1232
1184	void	1233	SV *
1185	ready (SV *self)	1234	ready (SV *self)
1186	PROTOTYPE: $	1235	PROTOTYPE: $
1187	CODE:	1236	CODE:
1188	api_ready (self);	1237	RETVAL = boolSV (api_ready (self));
		1238	OUTPUT:
		1239	RETVAL
		1240
		1241	SV *
		1242	is_ready (SV *self)
		1243	PROTOTYPE: $
		1244	CODE:
		1245	RETVAL = boolSV (api_is_ready (self));
		1246	OUTPUT:
		1247	RETVAL
1189		1248
1190	int	1249	int
1191	nready (...)	1250	nready (...)
1192	PROTOTYPE:	1251	PROTOTYPE:
1193	CODE:	1252	CODE:
…		…
1199		1258
1200	SV *	1259	SV *
1201	_get_state ()	1260	_get_state ()
1202	CODE:	1261	CODE:
1203	{	1262	{
1204	struct {	1263	struct io_state *data;
1205	int errorno;
1206	int laststype;
1207	int laststatval;
1208	Stat_t statcache;
1209	} data;
1210		1264
		1265	RETVAL = newSV (sizeof (struct io_state));
		1266	data = (struct io_state *)SvPVX (RETVAL);
		1267	SvCUR_set (RETVAL, sizeof (struct io_state));
		1268	SvPOK_only (RETVAL);
		1269
1211	data.errorno = errno;	1270	data->errorno = errno;
1212	data.laststype = PL_laststype;	1271	data->laststype = PL_laststype;
1213	data.laststatval = PL_laststatval;	1272	data->laststatval = PL_laststatval;
1214	data.statcache = PL_statcache;	1273	data->statcache = PL_statcache;
1215
1216	RETVAL = newSVpvn ((char *)&data, sizeof data);
1217	}	1274	}
1218	OUTPUT:	1275	OUTPUT:
1219	RETVAL	1276	RETVAL
1220		1277
1221	void	1278	void
1222	_set_state (char *data_)	1279	_set_state (char *data_)
1223	PROTOTYPE: $	1280	PROTOTYPE: $
1224	CODE:	1281	CODE:
1225	{	1282	{
1226	struct {	1283	struct io_state data = (void )data_;
1227	int errorno;
1228	int laststype;
1229	int laststatval;
1230	Stat_t statcache;
1231	} data = (void )data_;
1232		1284
1233	errno = data->errorno;	1285	errno = data->errorno;
1234	PL_laststype = data->laststype;	1286	PL_laststype = data->laststype;
1235	PL_laststatval = data->laststatval;	1287	PL_laststatval = data->laststatval;
1236	PL_statcache = data->statcache;	1288	PL_statcache = data->statcache;
1237	}	1289	}
		1290

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Comparing Coro/Coro/State.xs (file contents): Revision 1.92 by root, Sun Nov 26 02:16:19 2006 UTC vs. Revision 1.122 by root, Mon Dec 4 13:47:56 2006 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.92 by root, Sun Nov 26 02:16:19 2006 UTC vs.
Revision 1.122 by root, Mon Dec 4 13:47:56 2006 UTC