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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.85 by root, Fri Nov 24 00:32:04 2006 UTC vs.
Revision 1.108 by root, Mon Nov 27 18:15:47 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	#define PERL_VERSION_ATLEAST(a,b,c) \
		14	(PERL_REVISION > (a) \
		15	|| (PERL_REVISION == (a) \
		16	&& (PERL_VERSION > (b) \
		17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		18
		19	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	20	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	21	# define PL_ppaddr ppaddr
14	# endif	22	# endif
15	# ifndef call_sv	23	# ifndef call_sv
16	# define call_sv perl_call_sv	24	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	35	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	36	# define IS_PADCONST(v) 0
29	# endif	37	# endif
30	#endif	38	#endif
31		39
		40	#include <stdio.h>
32	#include <errno.h>	41	#include <errno.h>
33		42
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	44	# undef STACKGUARD
36	#endif	45	#endif
…		…
53	# ifndef PAGESIZE	62	# ifndef PAGESIZE
54	# define PAGESIZE pagesize	63	# define PAGESIZE pagesize
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)	64	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;	65	static long pagesize;
57	# else	66	# else
58	# define BOOT_PAGESIZE	67	# define BOOT_PAGESIZE (void)0
59	# endif	68	# endif
		69	#else
		70	# define PAGESIZE 0
		71	# define BOOT_PAGESIZE (void)0
60	#endif	72	#endif
61
62	#define SUB_INIT "Coro::State::initialize"
63	#define UCORO_STATE "_coro_state"
64		73
65	/* The next macro should declare a variable stacklevel that contains and approximation	74	/* 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	75	* to the current C stack pointer. Its property is that it changes with each call
67	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
69		79
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		81
72	#define labs(l) ((l) >= 0 ? (l) : -(l))	82	#if __GNUC__ >= 3
		83	# define attribute(x) __attribute__(x)
		84	#else
		85	# define attribute(x)
		86	#endif
		87
		88	#define NOINLINE attribute ((noinline))
73		89
74	#include "CoroAPI.h"	90	#include "CoroAPI.h"
		91
		92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
75		93
76	#ifdef USE_ITHREADS	94	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	95	static perl_mutex coro_mutex;
78	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
82	# define UNLOCK (void)0	100	# define UNLOCK (void)0
83	#endif	101	#endif
84		102
85	static struct CoroAPI coroapi;	103	static struct CoroAPI coroapi;
86	static AV *main_mainstack; /* used to differentiate between $main and others */	104	static AV *main_mainstack; /* used to differentiate between $main and others */
87	static HV *coro_state_stash;	105	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 */	106	static SV *coro_mortal; /* will be freed after next transfer */
91		107
92	/* this is actually not only the c stack but also c registers etc... */	108	static struct coro_cctx *cctx_first;
		109	static int cctx_count, cctx_idle;
		110
		111	/* this is a structure representing a c-level coroutine */
93	typedef struct {	112	typedef struct coro_cctx {
94	int refcnt; /* pointer reference counter */	113	struct coro_cctx *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		114
98	coro_context cctx;	115	/* the stack */
99
100	void *sptr;	116	void *sptr;
101	long ssize; /* positive == mmap, otherwise malloc */	117	long ssize; /* positive == mmap, otherwise malloc */
102	} coro_stack;
103		118
		119	/* cpu state */
		120	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		121	JMPENV *top_env;
		122	coro_context cctx;
		123
		124	#if USE_VALGRIND
		125	int valgrind_id;
		126	#endif
		127	} coro_cctx;
		128
		129	/* this is a structure representing a perl-level coroutine */
104	struct coro {	130	struct coro {
105	/* the optional C context */	131	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	132	coro_cctx *cctx;
107	void *cursp;	133
		134	/* data associated with this coroutine (initial args) */
		135	AV *args;
108	int gencnt;	136	int refcnt;
109		137
110	/* optionally saved, might be zero */	138	/* optionally saved, might be zero */
111	AV *defav;	139	AV *defav;
112	SV *defsv;	140	SV *defsv;
113	SV *errsv;	141	SV *errsv;
114		142
115	/* saved global state not related to stacks */	143	#define VAR(name,type) type name;
116	U8 dowarn;	144	# include "state.h"
117	I32 in_eval;	145	#undef VAR
118		146
119	/* the stacks and related info (callchain etc..) */	147	/* coro process data */
120	PERL_SI *curstackinfo;	148	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	};	149	};
153		150
154	typedef struct coro *Coro__State;	151	typedef struct coro *Coro__State;
155	typedef struct coro *Coro__State_or_hashref;	152	typedef struct coro *Coro__State_or_hashref;
156		153
157	static AV *	154	static AV *
158	coro_clone_padlist (pTHX_ CV *cv)	155	coro_clone_padlist (CV *cv)
159	{	156	{
160	AV *padlist = CvPADLIST (cv);	157	AV *padlist = CvPADLIST (cv);
161	AV *newpadlist, *newpad;	158	AV *newpadlist, *newpad;
162		159
163	newpadlist = newAV ();	160	newpadlist = newAV ();
164	AvREAL_off (newpadlist);	161	AvREAL_off (newpadlist);
165	#if PERL_VERSION < 9	162	#if PERL_VERSION_ATLEAST (5,9,0)
		163	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		164	#else
166	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
167	#else
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169	#endif	166	#endif
170	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	167	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
171	--AvFILLp (padlist);	168	--AvFILLp (padlist);
172		169
173	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	170	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
175		172
176	return newpadlist;	173	return newpadlist;
177	}	174	}
178		175
179	static void	176	static void
180	free_padlist (pTHX_ AV *padlist)	177	free_padlist (AV *padlist)
181	{	178	{
182	/* may be during global destruction */	179	/* may be during global destruction */
183	if (SvREFCNT (padlist))	180	if (SvREFCNT (padlist))
184	{	181	{
185	I32 i = AvFILLp (padlist);	182	I32 i = AvFILLp (padlist);
…		…
206	AV *padlist;	203	AV *padlist;
207	AV *av = (AV *)mg->mg_obj;	204	AV *av = (AV *)mg->mg_obj;
208		205
209	/* casting is fun. */	206	/* casting is fun. */
210	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	207	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
211	free_padlist (aTHX_ padlist);	208	free_padlist (padlist);
212		209
213	SvREFCNT_dec (av);	210	SvREFCNT_dec (av);
214		211
215	return 0;	212	return 0;
216	}	213	}
…		…
219		216
220	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	217	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221		218
222	/* the next two functions merely cache the padlists */	219	/* the next two functions merely cache the padlists */
223	static void	220	static void
224	get_padlist (pTHX_ CV *cv)	221	get_padlist (CV *cv)
225	{	222	{
226	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	223	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
227		224
228	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	225	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
229	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	226	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
230	else	227	else
231	{	228	{
232	#if 0	229	#if 0
233	/* this should work - but it doesn't :( */	230	/* this is probably cleaner, but also slower? */
234	CV *cp = Perl_cv_clone (aTHX_ cv);	231	CV *cp = Perl_cv_clone (cv);
235	CvPADLIST (cv) = CvPADLIST (cp);	232	CvPADLIST (cv) = CvPADLIST (cp);
236	CvPADLIST (cp) = 0;	233	CvPADLIST (cp) = 0;
237	SvREFCNT_dec (cp);	234	SvREFCNT_dec (cp);
238	#else	235	#else
239	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	236	CvPADLIST (cv) = coro_clone_padlist (cv);
240	#endif	237	#endif
241	}	238	}
242	}	239	}
243		240
244	static void	241	static void
245	put_padlist (pTHX_ CV *cv)	242	put_padlist (CV *cv)
246	{	243	{
247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	244	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
248		245
249	if (!mg)	246	if (!mg)
250	{	247	{
…		…
258	}	255	}
259		256
260	#define SB do {	257	#define SB do {
261	#define SE } while (0)	258	#define SE } while (0)
262		259
263	#define LOAD(state) load_state(aTHX_ (state));	260	#define LOAD(state) load_state((state));
264	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	261	#define SAVE(state,flags) save_state((state),(flags));
265		262
266	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	263	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
267		264
268	static void	265	static void
269	load_state(pTHX_ Coro__State c)	266	load_state(Coro__State c)
270	{	267	{
271	PL_dowarn = c->dowarn;	268	#define VAR(name,type) PL_ ## name = c->name;
272	PL_in_eval = c->in_eval;	269	# include "state.h"
273		270	#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		271
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	272	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	273	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	274	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
309		275
…		…
316	{	282	{
317	AV *padlist = (AV *)POPs;	283	AV *padlist = (AV *)POPs;
318		284
319	if (padlist)	285	if (padlist)
320	{	286	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	287	put_padlist (cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	288	CvPADLIST(cv) = padlist;
323	}	289	}
324		290
325	++CvDEPTH(cv);	291	++CvDEPTH(cv);
326	}	292	}
…		…
328	PUTBACK;	294	PUTBACK;
329	}	295	}
330	}	296	}
331		297
332	static void	298	static void
333	save_state(pTHX_ Coro__State c, int flags)	299	save_state(Coro__State c, int flags)
334	{	300	{
335	{	301	{
336	dSP;	302	dSP;
337	I32 cxix = cxstack_ix;	303	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	304	PERL_CONTEXT *ccstk = cxstack;
…		…
366	}	332	}
367		333
368	PUSHs ((SV *)CvPADLIST(cv));	334	PUSHs ((SV *)CvPADLIST(cv));
369	PUSHs ((SV *)cv);	335	PUSHs ((SV *)cv);
370		336
371	get_padlist (aTHX_ cv);	337	get_padlist (cv);
372	}	338	}
373	}	339	}
374	#ifdef CXt_FORMAT	340	#ifdef CXt_FORMAT
375	else if (CxTYPE(cx) == CXt_FORMAT)	341	else if (CxTYPE(cx) == CXt_FORMAT)
376	{	342	{
…		…
394		360
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	361	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	362	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	363	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
398		364
399	c->dowarn = PL_dowarn;	365	#define VAR(name,type)c->name = PL_ ## name;
400	c->in_eval = PL_in_eval;	366	# include "state.h"
401		367	#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	}	368	}
434		369
435	/*	370	/*
436	* allocate various perl stacks. This is an exact copy	371	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	372	* of perl.c:init_stacks, except that it uses less memory
438	* on the (sometimes correct) assumption that coroutines do	373	* on the (sometimes correct) assumption that coroutines do
439	* not usually need a lot of stackspace.	374	* not usually need a lot of stackspace.
440	*/	375	*/
441	static void	376	static void
442	coro_init_stacks (pTHX)	377	coro_init_stacks ()
443	{	378	{
444	LOCK;
445
446	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	379	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
447	PL_curstackinfo->si_type = PERLSI_MAIN;	380	PL_curstackinfo->si_type = PERLSI_MAIN;
448	PL_curstack = PL_curstackinfo->si_stack;	381	PL_curstack = PL_curstackinfo->si_stack;
449	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	382	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
450		383
…		…
471		404
472	New(54,PL_savestack,96,ANY);	405	New(54,PL_savestack,96,ANY);
473	PL_savestack_ix = 0;	406	PL_savestack_ix = 0;
474	PL_savestack_max = 96;	407	PL_savestack_max = 96;
475		408
476	#if PERL_VERSION < 9	409	#if !PERL_VERSION_ATLEAST (5,9,0)
477	New(54,PL_retstack,8,OP*);	410	New(54,PL_retstack,8,OP*);
478	PL_retstack_ix = 0;	411	PL_retstack_ix = 0;
479	PL_retstack_max = 8;	412	PL_retstack_max = 8;
480	#endif	413	#endif
481
482	UNLOCK;
483	}	414	}
484		415
485	/*	416	/*
486	* destroy the stacks, the callchain etc...	417	* destroy the stacks, the callchain etc...
487	*/	418	*/
488	static void	419	static void
489	destroy_stacks(pTHX)	420	coro_destroy_stacks ()
490	{	421	{
491	if (!IN_DESTRUCT)	422	if (!IN_DESTRUCT)
492	{	423	{
493	/* is this ugly, I ask? */	424	/* is this ugly, I ask? */
494	LEAVE_SCOPE (0);	425	LEAVE_SCOPE (0);
…		…
525		456
526	Safefree (PL_tmps_stack);	457	Safefree (PL_tmps_stack);
527	Safefree (PL_markstack);	458	Safefree (PL_markstack);
528	Safefree (PL_scopestack);	459	Safefree (PL_scopestack);
529	Safefree (PL_savestack);	460	Safefree (PL_savestack);
530	#if PERL_VERSION < 9	461	#if !PERL_VERSION_ATLEAST (5,9,0)
531	Safefree (PL_retstack);	462	Safefree (PL_retstack);
532	#endif	463	#endif
533	}	464	}
534		465
535	static void	466	static void
536	allocate_stack (Coro__State ctx, int alloc)	467	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	{	468	{
598	/*	469	/*
599	* emulate part of the perl startup here.	470	* emulate part of the perl startup here.
600	*/	471	*/
601	dTHX;
602	dSP;
603	Coro__State ctx = (Coro__State)arg;
604	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
605		472
606	coro_init_stacks (aTHX);	473	coro_init_stacks ();
		474
607	/*PL_curcop = 0;*/	475	PL_curcop = 0;
608	/*PL_in_eval = PL_in_eval;*/ /* inherit */	476	PL_in_eval = 0;
		477	PL_curpm = 0;
		478
		479	{
		480	dSP;
		481	LOGOP myop;
		482
		483	/* I have no idea why this is needed, but it is */
		484	PUSHMARK (SP);
		485
609	SvREFCNT_dec (GvAV (PL_defgv));	486	SvREFCNT_dec (GvAV (PL_defgv));
610	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	487	GvAV (PL_defgv) = coro->args; coro->args = 0;
611		488
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);	489	Zero (&myop, 1, LOGOP);
632	myop.op_next = Nullop;	490	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;	491	myop.op_flags = OPf_WANT_VOID;
634		492
635	PL_op = (OP *)&myop;	493	PL_op = (OP *)&myop;
636		494
637	PUSHMARK(SP);	495	PUSHMARK (SP);
638	XPUSHs (sub_init);	496	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
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;	497	PUTBACK;
647	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	498	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
648	SPAGAIN;	499	SPAGAIN;
649		500
650	ENTER; /* necessary e.g. for dounwind */	501	ENTER; /* necessary e.g. for dounwind */
651	}	502	}
652	}	503	}
653		504
654	static void	505	static void
655	continue_coro (void *arg)	506	free_coro_mortal ()
656	{	507	{
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	/* never call directly, always through the coro_state_transfer global variable */
673	static void
674	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
675	{
676	dSTACKLEVEL;
677
678	if (prev != next)
679	{
680	/* has this coro been created yet? */
681	if (next->mainstack)
682	{
683	LOCK;
684	SAVE (prev, flags);
685	LOAD (next);
686	UNLOCK;
687
688	/* mark this state as in-use */
689	next->mainstack = 0;
690	next->tmps_ix = -2;
691
692	/* stacklevel changed? if yes, grab the stack for us! */
693	if (flags & TRANSFER_SAVE_CCTXT)
694	{
695	if (!prev->stack)
696	allocate_stack (prev, 0);
697	else if (prev->cursp != stacklevel
698	&& prev->stack->usecnt > 1)
699	{
700	prev->gencnt = ++prev->stack->gencnt;
701	prev->stack->usecnt = 1;
702	}
703
704	/* has our stack been invalidated? */
705	if (next->stack && next->stack->gencnt != next->gencnt)
706	{
707	deallocate_stack (next);
708	allocate_stack (next, 1);
709	coro_create (&(next->stack->cctx),
710	continue_coro, (void *)next,
711	next->stack->sptr, labs (next->stack->ssize));
712	}
713
714	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715	prev->cursp = stacklevel;
716	/* don't add any code here */
717	}
718	else
719	next->cursp = stacklevel;
720	}
721	else if (next->tmps_ix == -2)
722	croak ("tried to transfer to running coroutine");
723	else
724	{
725	LOCK;
726	SAVE (prev, -1); /* first get rid of the old state */
727	UNLOCK;
728
729	/* create the coroutine for the first time */
730	if (flags & TRANSFER_SAVE_CCTXT)
731	{
732	if (!prev->stack)
733	allocate_stack (prev, 0);
734
735	/* the new coroutine starts with start_env again */
736	PL_top_env = &PL_start_env;
737
738	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
739	{
740	setup_coro (next);
741	next->cursp = stacklevel;
742
743	prev->stack->refcnt++;
744	prev->stack->usecnt++;
745	next->stack = prev->stack;
746	next->gencnt = prev->gencnt;
747	}
748	else
749	{
750	assert (!next->stack);
751	allocate_stack (next, 1);
752	coro_create (&(next->stack->cctx),
753	setup_coro, (void *)next,
754	next->stack->sptr, labs (next->stack->ssize));
755	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
756	prev->cursp = stacklevel;
757	/* don't add any code here */
758	}
759	}
760	else
761	{
762	setup_coro (next);
763	next->cursp = stacklevel;
764	}
765	}
766	}
767
768	LOCK;
769	if (coro_mortal)	508	if (coro_mortal)
770	{	509	{
771	SvREFCNT_dec (coro_mortal);	510	SvREFCNT_dec (coro_mortal);
772	coro_mortal = 0;	511	coro_mortal = 0;
773	}	512	}
		513	}
		514
		515	static void NOINLINE
		516	prepare_cctx (coro_cctx *cctx)
		517	{
		518	dSP;
		519	LOGOP myop;
		520
		521	Zero (&myop, 1, LOGOP);
		522	myop.op_next = PL_op;
		523	myop.op_flags = OPf_WANT_VOID;
		524
		525	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		526
		527	PUSHMARK (SP);
		528	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		529	PUTBACK;
		530	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		531	SPAGAIN;
		532	}
		533
		534	static void
		535	coro_run (void *arg)
		536	{
		537	/* coro_run is the alternative epilogue of transfer() */
774	UNLOCK;	538	UNLOCK;
775	}
776		539
777	/* use this function pointer to call the above function */	540	/*
778	/* this is done to increase chances of the compiler not inlining the call */	541	* this is a _very_ stripped down perl interpreter ;)
779	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	542	*/
		543	PL_top_env = &PL_start_env;
780		544
781	#define SV_CORO(sv,func) \	545	/* inject call to cctx_init */
782	do { \	546	prepare_cctx ((coro_cctx *)arg);
783	if (SvROK (sv)) \
784	sv = SvRV (sv); \
785	\
786	if (SvTYPE (sv) == SVt_PVHV) \
787	{ \
788	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
789	\
790	if (!he) \
791	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
792	\
793	(sv) = SvRV (HeVAL(he)); \
794	} \
795	\
796	/* must also be changed inside Coro::Cont::yield */ \
797	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
798	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
799	\
800	} while(0)
801		547
802	#define SvSTATE(sv) INT2PTR (struct coro *, SvIVX (sv))	548	/* somebody will hit me for both perl_run and PL_restartop */
		549	perl_run (PL_curinterp);
803		550
		551	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		552	abort ();
		553	}
		554
		555	static coro_cctx *
		556	cctx_new ()
		557	{
		558	coro_cctx *cctx;
		559
		560	++cctx_count;
		561
		562	New (0, cctx, 1, coro_cctx);
		563
		564	#if HAVE_MMAP
		565
		566	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		567	/* mmap suppsedly does allocate-on-write for us */
		568	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		569
		570	if (cctx->sptr == (void *)-1)
		571	{
		572	perror ("FATAL: unable to mmap stack for coroutine");
		573	_exit (EXIT_FAILURE);
		574	}
		575
		576	# if STACKGUARD
		577	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		578	# endif
		579
		580	#else
		581
		582	cctx->ssize = STACKSIZE * (long)sizeof (long);
		583	New (0, cctx->sptr, STACKSIZE, long);
		584
		585	if (!cctx->sptr)
		586	{
		587	perror ("FATAL: unable to malloc stack for coroutine");
		588	_exit (EXIT_FAILURE);
		589	}
		590
		591	#endif
		592
		593	#if USE_VALGRIND
		594	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		595	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		596	cctx->ssize + (char *)cctx->sptr
		597	);
		598	#endif
		599
		600	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		601
		602	return cctx;
		603	}
		604
		605	static void
		606	cctx_free (coro_cctx *cctx)
		607	{
		608	if (!cctx)
		609	return;
		610
		611	--cctx_count;
		612
		613	#if USE_VALGRIND
		614	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		615	#endif
		616
		617	#if HAVE_MMAP
		618	munmap (cctx->sptr, cctx->ssize);
		619	#else
		620	Safefree (cctx->sptr);
		621	#endif
		622
		623	Safefree (cctx);
		624	}
		625
		626	static coro_cctx *
		627	cctx_get ()
		628	{
		629	coro_cctx *cctx;
		630
		631	if (cctx_first)
		632	{
		633	--cctx_idle;
		634	cctx = cctx_first;
		635	cctx_first = cctx->next;
		636	}
		637	else
		638	{
		639	cctx = cctx_new ();
		640	PL_op = PL_op->op_next;
		641	}
		642
		643	return cctx;
		644	}
		645
		646	static void
		647	cctx_put (coro_cctx *cctx)
		648	{
		649	++cctx_idle;
		650	cctx->next = cctx_first;
		651	cctx_first = cctx;
		652	}
		653
		654	/* never call directly, always through the coro_state_transfer global variable */
		655	static void NOINLINE
		656	transfer (struct coro *prev, struct coro *next, int flags)
		657	{
		658	dSTACKLEVEL;
		659
		660	/* sometimes transfer is only called to set idle_sp */
		661	if (flags == TRANSFER_SET_STACKLEVEL)
		662	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		663	else if (prev != next)
		664	{
		665	coro_cctx *prev__cctx;
		666
		667	LOCK;
		668
		669	if (next->mainstack)
		670	{
		671	/* coroutine already started */
		672	SAVE (prev, flags);
		673	LOAD (next);
		674	}
		675	else
		676	{
		677	/* need to start coroutine */
		678	/* first get rid of the old state */
		679	SAVE (prev, -1);
		680	/* setup coroutine call */
		681	setup_coro (next);
		682	/* need a stack */
		683	next->cctx = 0;
		684	}
		685
		686	if (!prev->cctx)
		687	/* create a new empty context */
		688	Newz (0, prev->cctx, 1, coro_cctx);
		689
		690	prev__cctx = prev->cctx;
		691
		692	/* possibly "free" the cctx */
		693	if (prev__cctx->idle_sp == STACKLEVEL)
		694	{
		695	cctx_put (prev__cctx);
		696	prev->cctx = 0;
		697	}
		698
		699	if (!next->cctx)
		700	next->cctx = cctx_get ();
		701
		702	if (prev__cctx != next->cctx)
		703	{
		704	prev__cctx->top_env = PL_top_env;
		705	PL_top_env = next->cctx->top_env;
		706	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		707	}
		708
		709	free_coro_mortal ();
		710
		711	UNLOCK;
		712	}
		713	}
		714
		715	struct transfer_args
		716	{
		717	struct coro *prev, *next;
		718	int flags;
		719	};
		720
		721	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		722
		723	static void
		724	coro_state_destroy (struct coro *coro)
		725	{
		726	if (coro->refcnt--)
		727	return;
		728
		729	if (coro->mainstack && coro->mainstack != main_mainstack)
		730	{
		731	struct coro temp;
		732
		733	SAVE ((&temp), TRANSFER_SAVE_ALL);
		734	LOAD (coro);
		735
		736	coro_destroy_stacks ();
		737
		738	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		739
		740	coro->mainstack = 0;
		741	}
		742
		743	cctx_free (coro->cctx);
		744	SvREFCNT_dec (coro->args);
		745	Safefree (coro);
		746	}
		747
804	static void	748	static int
		749	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		750	{
		751	struct coro *coro = (struct coro *)mg->mg_ptr;
		752	mg->mg_ptr = 0;
		753
		754	coro_state_destroy (coro);
		755
		756	return 0;
		757	}
		758
		759	static int
		760	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		761	{
		762	struct coro *coro = (struct coro *)mg->mg_ptr;
		763
		764	++coro->refcnt;
		765
		766	return 0;
		767	}
		768
		769	static MGVTBL coro_state_vtbl = {
		770	0, 0, 0, 0,
		771	coro_state_clear,
		772	0,
		773	#ifdef MGf_DUP
		774	coro_state_dup,
		775	#else
		776	# define MGf_DUP 0
		777	#endif
		778	};
		779
		780	static struct coro *
		781	SvSTATE (SV *coro)
		782	{
		783	HV *stash;
		784	MAGIC *mg;
		785
		786	if (SvROK (coro))
		787	coro = SvRV (coro);
		788
		789	stash = SvSTASH (coro);
		790	if (stash != coro_stash && stash != coro_state_stash)
		791	{
		792	/* very slow, but rare, check */
		793	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		794	croak ("Coro::State object required");
		795	}
		796
		797	mg = SvMAGIC (coro);
		798	assert (mg->mg_type == PERL_MAGIC_ext);
		799	return (struct coro *)mg->mg_ptr;
		800	}
		801
		802	static void
		803	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		804	{
		805	ta->prev = SvSTATE (prev);
		806	ta->next = SvSTATE (next);
		807	ta->flags = flags;
		808	}
		809
		810	static void
805	api_transfer (pTHX_ SV *prev, SV *next, int flags)	811	api_transfer (SV *prev, SV *next, int flags)
806	{	812	{
807	SV_CORO (prev, "Coro::transfer");	813	dTHX;
808	SV_CORO (next, "Coro::transfer");	814	struct transfer_args ta;
809		815
810	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	816	prepare_transfer (&ta, prev, next, flags);
		817	TRANSFER (ta);
811	}	818	}
812		819
813	/** Coro ********************************************************************/	820	/** Coro ********************************************************************/
814		821
815	#define PRIO_MAX 3	822	#define PRIO_MAX 3
…		…
823	static GV *coro_current, *coro_idle;	830	static GV *coro_current, *coro_idle;
824	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	831	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
825	static int coro_nready;	832	static int coro_nready;
826		833
827	static void	834	static void
828	coro_enq (pTHX_ SV *sv)	835	coro_enq (SV *sv)
829	{	836	{
830	SV **xprio;
831	int prio;	837	int prio;
832		838
833	if (SvTYPE (sv) != SVt_PVHV)	839	if (SvTYPE (sv) != SVt_PVHV)
834	croak ("Coro::ready tried to enqueue something that is not a coroutine");	840	croak ("Coro::ready tried to enqueue something that is not a coroutine");
835		841
836	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);	842	prio = SvSTATE (sv)->prio;
837	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
838
839	prio = prio > PRIO_MAX ? PRIO_MAX
840	: prio < PRIO_MIN ? PRIO_MIN
841	: prio;
842		843
843	av_push (coro_ready [prio - PRIO_MIN], sv);	844	av_push (coro_ready [prio - PRIO_MIN], sv);
844	coro_nready++;	845	coro_nready++;
845	}	846	}
846		847
847	static SV *	848	static SV *
848	coro_deq (pTHX_ int min_prio)	849	coro_deq (int min_prio)
849	{	850	{
850	int prio = PRIO_MAX - PRIO_MIN;	851	int prio = PRIO_MAX - PRIO_MIN;
851		852
852	min_prio -= PRIO_MIN;	853	min_prio -= PRIO_MIN;
853	if (min_prio < 0)	854	if (min_prio < 0)
…		…
870		871
871	if (SvROK (coro))	872	if (SvROK (coro))
872	coro = SvRV (coro);	873	coro = SvRV (coro);
873		874
874	LOCK;	875	LOCK;
875	coro_enq (aTHX_ SvREFCNT_inc (coro));	876	coro_enq (SvREFCNT_inc (coro));
876	UNLOCK;	877	UNLOCK;
877	}	878	}
878		879
879	static void	880	static void
		881	prepare_schedule (struct transfer_args *ta)
		882	{
		883	SV *current, *prev, *next;
		884
		885	current = GvSV (coro_current);
		886
		887	for (;;)
		888	{
		889	LOCK;
		890	next = coro_deq (PRIO_MIN);
		891	UNLOCK;
		892
		893	if (next)
		894	break;
		895
		896	{
		897	dSP;
		898
		899	ENTER;
		900	SAVETMPS;
		901
		902	PUSHMARK (SP);
		903	PUTBACK;
		904	call_sv (GvSV (coro_idle), G_DISCARD);
		905
		906	FREETMPS;
		907	LEAVE;
		908	}
		909	}
		910
		911	prev = SvRV (current);
		912	SvRV (current) = next;
		913
		914	/* free this only after the transfer */
		915	LOCK;
		916	free_coro_mortal ();
		917	UNLOCK;
		918	coro_mortal = prev;
		919
		920	ta->prev = SvSTATE (prev);
		921	ta->next = SvSTATE (next);
		922	ta->flags = TRANSFER_SAVE_ALL;
		923	}
		924
		925	static void
		926	prepare_cede (struct transfer_args *ta)
		927	{
		928	LOCK;
		929	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		930	UNLOCK;
		931
		932	prepare_schedule (ta);
		933	}
		934
		935	static void
880	api_schedule (void)	936	api_schedule (void)
881	{	937	{
882	dTHX;	938	dTHX;
		939	struct transfer_args ta;
883		940
884	SV *prev, *next;	941	prepare_schedule (&ta);
885		942	TRANSFER (ta);
886	LOCK;
887
888	prev = SvRV (GvSV (coro_current));
889	next = coro_deq (aTHX_ PRIO_MIN);
890
891	if (!next)
892	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
893
894	/* free this only after the transfer */
895	coro_mortal = prev;
896	SV_CORO (prev, "Coro::schedule");
897
898	SvRV (GvSV (coro_current)) = next;
899
900	SV_CORO (next, "Coro::schedule");
901
902	UNLOCK;
903
904	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
905	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
906	}	943	}
907		944
908	static void	945	static void
909	api_cede (void)	946	api_cede (void)
910	{	947	{
911	dTHX;	948	dTHX;
		949	struct transfer_args ta;
912		950
913	LOCK;	951	prepare_cede (&ta);
914	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	952	TRANSFER (ta);
915	UNLOCK;
916
917	api_schedule ();
918	}	953	}
919		954
920	MODULE = Coro::State PACKAGE = Coro::State	955	MODULE = Coro::State PACKAGE = Coro::State
921		956
922	PROTOTYPES: ENABLE	957	PROTOTYPES: DISABLE
923		958
924	BOOT:	959	BOOT:
925	{ /* {} necessary for stoopid perl-5.6.x */	960	{
926	#ifdef USE_ITHREADS	961	#ifdef USE_ITHREADS
927	MUTEX_INIT (&coro_mutex);	962	MUTEX_INIT (&coro_mutex);
928	#endif	963	#endif
929	BOOT_PAGESIZE;	964	BOOT_PAGESIZE;
930		965
931	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
932	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
933	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	966	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
934		967
935	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	968	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
936	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	969	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
937	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	970	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
938	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
939		971
940	main_mainstack = PL_mainstack;	972	main_mainstack = PL_mainstack;
941		973
942	coroapi.ver = CORO_API_VERSION;	974	coroapi.ver = CORO_API_VERSION;
943	coroapi.transfer = api_transfer;	975	coroapi.transfer = api_transfer;
944	}
945		976
946	Coro::State	977	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
947	_newprocess(args)	978	}
948	SV * args	979
949	PROTOTYPE: $	980	SV *
		981	new (char *klass, ...)
950	CODE:	982	CODE:
951	Coro__State coro;	983	{
		984	struct coro *coro;
		985	HV *hv;
		986	int i;
952		987
953	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
954	croak ("Coro::State::_newprocess expects an arrayref");
955
956	Newz (0, coro, 1, struct coro);	988	Newz (0, coro, 1, struct coro);
		989	coro->args = newAV ();
957		990
958	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	991	hv = newHV ();
959	/*coro->mainstack = 0; *//*actual work is done inside transfer */	992	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
960	/*coro->stack = 0;*/	993	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
961		994
962	RETVAL = coro;	995	for (i = 1; i < items; i++)
		996	av_push (coro->args, newSVsv (ST (i)));
		997	}
963	OUTPUT:	998	OUTPUT:
964	RETVAL	999	RETVAL
965		1000
966	void	1001	void
967	transfer(prev, next, flags)	1002	_set_stacklevel (...)
968	SV *prev	1003	ALIAS:
969	SV *next	1004	Coro::State::transfer = 1
970	int flags	1005	Coro::schedule = 2
971	PROTOTYPE: @	1006	Coro::cede = 3
		1007	Coro::Cont::yield = 4
972	CODE:	1008	CODE:
973	PUTBACK;	1009	{
974	SV_CORO (next, "Coro::transfer");	1010	struct transfer_args ta;
975	SV_CORO (prev, "Coro::transfer");	1011
976	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1012	switch (ix)
977	SPAGAIN;	1013	{
		1014	case 0:
		1015	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1016	ta.next = 0;
		1017	ta.flags = TRANSFER_SET_STACKLEVEL;
		1018	break;
		1019
		1020	case 1:
		1021	if (items != 3)
		1022	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1023
		1024	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1025	break;
		1026
		1027	case 2:
		1028	prepare_schedule (&ta);
		1029	break;
		1030
		1031	case 3:
		1032	prepare_cede (&ta);
		1033	break;
		1034
		1035	case 4:
		1036	{
		1037	SV *yieldstack;
		1038	SV *sv;
		1039	AV *defav = GvAV (PL_defgv);
		1040
		1041	yieldstack = *hv_fetch (
		1042	(HV *)SvRV (GvSV (coro_current)),
		1043	"yieldstack", sizeof ("yieldstack") - 1,
		1044	0
		1045	);
		1046
		1047	/* set up @_ -- ugly */
		1048	av_clear (defav);
		1049	av_fill (defav, items - 1);
		1050	while (items--)
		1051	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1052
		1053	sv = av_pop ((AV *)SvRV (yieldstack));
		1054	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1055	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1056	ta.flags = 0;
		1057	SvREFCNT_dec (sv);
		1058	}
		1059	break;
		1060
		1061	}
		1062
		1063	TRANSFER (ta);
		1064	}
978		1065
979	void	1066	void
980	DESTROY(coro)	1067	_clone_state_from (SV *dst, SV *src)
981	Coro::State coro	1068	CODE:
982	CODE:	1069	{
		1070	struct coro *coro_src = SvSTATE (src);
983		1071
984	if (coro->mainstack && coro->mainstack != main_mainstack)	1072	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
985	{
986	struct coro temp;
987		1073
988	PUTBACK;	1074	++coro_src->refcnt;
989	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1075	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
990	LOAD (aTHX_ coro);	1076	}
991	SPAGAIN;
992
993	destroy_stacks (aTHX);
994
995	LOAD ((&temp)); /* this will get rid of defsv etc.. */
996	SPAGAIN;
997
998	coro->mainstack = 0;
999	}
1000
1001	deallocate_stack (coro);
1002	SvREFCNT_dec (coro->args);
1003	Safefree (coro);
1004		1077
1005	void	1078	void
1006	_exit(code)	1079	_exit (code)
1007	int code	1080	int code
1008	PROTOTYPE: $	1081	PROTOTYPE: $
1009	CODE:	1082	CODE:
1010	_exit (code);	1083	_exit (code);
1011		1084
1012	MODULE = Coro::State PACKAGE = Coro::Cont	1085	int
		1086	cctx_count ()
		1087	CODE:
		1088	RETVAL = cctx_count;
		1089	OUTPUT:
		1090	RETVAL
1013		1091
1014	void	1092	int
1015	yield(...)	1093	cctx_idle ()
1016	PROTOTYPE: @	1094	CODE:
1017	CODE:	1095	RETVAL = cctx_idle;
1018	SV *yieldstack;	1096	OUTPUT:
1019	SV *sv;	1097	RETVAL
1020	AV *defav = GvAV (PL_defgv);
1021	struct coro *prev, *next;
1022
1023	yieldstack = *hv_fetch (
1024	(HV *)SvRV (GvSV (coro_current)),
1025	"yieldstack", sizeof ("yieldstack") - 1,
1026	0
1027	);
1028
1029	/* set up @_ -- ugly */
1030	av_clear (defav);
1031	av_fill (defav, items - 1);
1032	while (items--)
1033	av_store (defav, items, SvREFCNT_inc (ST(items)));
1034
1035	sv = av_pop ((AV *)SvRV (yieldstack));
1036	prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1037	next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1038	SvREFCNT_dec (sv);
1039
1040	coro_state_transfer (aTHX_ prev, next, 0);
1041		1098
1042	MODULE = Coro::State PACKAGE = Coro	1099	MODULE = Coro::State PACKAGE = Coro
1043		1100
1044	BOOT:	1101	BOOT:
1045	{	1102	{
1046	int i;	1103	int i;
		1104
1047	HV *stash = gv_stashpv ("Coro", TRUE);	1105	coro_stash = gv_stashpv ("Coro", TRUE);
1048		1106
1049	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1107	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1050	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1108	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1051	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1109	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1052	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1110	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1053	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1111	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1054	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1112	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1055		1113
1056	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1114	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1057	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1115	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1058		1116
1059	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1117	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1072	sv_setiv (sv, (IV)&coroapi);	1130	sv_setiv (sv, (IV)&coroapi);
1073	SvREADONLY_on (sv);	1131	SvREADONLY_on (sv);
1074	}	1132	}
1075	}	1133	}
1076		1134
1077	#if !PERL_MICRO	1135	int
		1136	prio (Coro::State coro, int newprio = 0)
		1137	ALIAS:
		1138	nice = 1
		1139	CODE:
		1140	{
		1141	RETVAL = coro->prio;
		1142
		1143	if (items > 1)
		1144	{
		1145	if (ix)
		1146	newprio += coro->prio;
		1147
		1148	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1149	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1150
		1151	coro->prio = newprio;
		1152	}
		1153	}
1078		1154
1079	void	1155	void
1080	ready(self)	1156	ready (SV *self)
1081	SV * self
1082	PROTOTYPE: $	1157	PROTOTYPE: $
1083	CODE:	1158	CODE:
1084	api_ready (self);	1159	api_ready (self);
1085		1160
1086	#endif
1087
1088	int	1161	int
1089	nready(...)	1162	nready (...)
1090	PROTOTYPE:	1163	PROTOTYPE:
1091	CODE:	1164	CODE:
1092	RETVAL = coro_nready;	1165	RETVAL = coro_nready;
1093	OUTPUT:	1166	OUTPUT:
1094	RETVAL	1167	RETVAL
1095		1168
1096	void	1169	MODULE = Coro::State PACKAGE = Coro::AIO
1097	schedule(...)
1098	PROTOTYPE:
1099	CODE:
1100	api_schedule ();
1101		1170
1102	void
1103	cede(...)
1104	PROTOTYPE:
1105	CODE:
1106	api_cede ();
1107
1108	# and these are hacks
1109	SV *	1171	SV *
1110	_aio_get_state ()	1172	_get_state ()
1111	CODE:	1173	CODE:
1112	{	1174	{
1113	struct {	1175	struct {
1114	int errorno;	1176	int errorno;
1115	int laststype;	1177	int laststype;
…		…
1126	}	1188	}
1127	OUTPUT:	1189	OUTPUT:
1128	RETVAL	1190	RETVAL
1129		1191
1130	void	1192	void
1131	_aio_set_state (char *data_)	1193	_set_state (char *data_)
1132	PROTOTYPE: $	1194	PROTOTYPE: $
1133	CODE:	1195	CODE:
1134	{	1196	{
1135	struct {	1197	struct {
1136	int errorno;	1198	int errorno;

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