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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.77 by root, Tue Oct 31 23:55:33 2006 UTC vs.
Revision 1.109 by root, Mon Nov 27 18:45:29 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>
		42
		43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		44	# undef STACKGUARD
		45	#endif
		46
		47	#ifndef STACKGUARD
		48	# define STACKGUARD 0
		49	#endif
33		50
34	#ifdef HAVE_MMAP	51	#ifdef HAVE_MMAP
35	# include <unistd.h>	52	# include <unistd.h>
36	# include <sys/mman.h>	53	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS	54	# ifndef MAP_ANONYMOUS
…		…
39	# define MAP_ANONYMOUS MAP_ANON	56	# define MAP_ANONYMOUS MAP_ANON
40	# else	57	# else
41	# undef HAVE_MMAP	58	# undef HAVE_MMAP
42	# endif	59	# endif
43	# endif	60	# endif
		61	# include <limits.h>
		62	# ifndef PAGESIZE
		63	# define PAGESIZE pagesize
		64	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		65	static long pagesize;
		66	# else
		67	# define BOOT_PAGESIZE (void)0
44	#endif	68	# endif
45		69	#else
46	#define SUB_INIT "Coro::State::initialize"	70	# define PAGESIZE 0
47	#define UCORO_STATE "_coro_state"	71	# define BOOT_PAGESIZE (void)0
		72	#endif
48		73
49	/* 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
50	* 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
51	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
53		79
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		81
56	#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))
57		89
58	#include "CoroAPI.h"	90	#include "CoroAPI.h"
		91
		92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
59		93
60	#ifdef USE_ITHREADS	94	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	95	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
66	# define UNLOCK (void)0	100	# define UNLOCK (void)0
67	#endif	101	#endif
68		102
69	static struct CoroAPI coroapi;	103	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	104	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	105	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV *coro_mortal; /* will be freed after next transfer */	106	static SV *coro_mortal; /* will be freed after next transfer */
75		107
76	/* 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 */
77	typedef struct {	112	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	113	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		114
82	coro_context cctx;	115	/* the stack */
83
84	void *sptr;	116	void *sptr;
85	long ssize; /* positive == mmap, otherwise malloc */	117	long ssize; /* positive == mmap, otherwise malloc */
86	} coro_stack;
87		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 */
88	struct coro {	130	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	131	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	132	coro_cctx *cctx;
91		133
92	/* the optional C context */	134	/* data associated with this coroutine (initial args) */
93	coro_stack *stack;	135	AV *args;
94	void *cursp;
95	int gencnt;	136	int refcnt;
96		137
97	/* optionally saved, might be zero */	138	/* optionally saved, might be zero */
98	AV *defav;	139	AV *defav;
99	SV *defsv;	140	SV *defsv;
100	SV *errsv;	141	SV *errsv;
101		142
102	/* saved global state not related to stacks */	143	#define VAR(name,type) type name;
103	U8 dowarn;	144	# include "state.h"
104	I32 in_eval;	145	#undef VAR
105		146
106	/* the stacks and related info (callchain etc..) */	147	/* coro process data */
107	PERL_SI *curstackinfo;	148	int prio;
108	AV *curstack;
109	AV *mainstack;
110	SV **stack_sp;
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	CV *compcv;
115	SV **stack_base;
116	SV **stack_max;
117	SV **tmps_stack;
118	I32 tmps_floor;
119	I32 tmps_ix;
120	I32 tmps_max;
121	I32 *markstack;
122	I32 *markstack_ptr;
123	I32 *markstack_max;
124	I32 *scopestack;
125	I32 scopestack_ix;
126	I32 scopestack_max;
127	ANY *savestack;
128	I32 savestack_ix;
129	I32 savestack_max;
130	OP **retstack;
131	I32 retstack_ix;
132	I32 retstack_max;
133	PMOP *curpm;
134	COP *curcop;
135	JMPENV *top_env;
136
137	/* data associated with this coroutine (initial args) */
138	AV *args;
139	};	149	};
140		150
141	typedef struct coro *Coro__State;	151	typedef struct coro *Coro__State;
142	typedef struct coro *Coro__State_or_hashref;	152	typedef struct coro *Coro__State_or_hashref;
143		153
144	static AV *	154	static AV *
145	coro_clone_padlist (pTHX_ CV *cv)	155	coro_clone_padlist (CV *cv)
146	{	156	{
147	AV *padlist = CvPADLIST (cv);	157	AV *padlist = CvPADLIST (cv);
148	AV *newpadlist, *newpad;	158	AV *newpadlist, *newpad;
149		159
150	newpadlist = newAV ();	160	newpadlist = newAV ();
151	AvREAL_off (newpadlist);	161	AvREAL_off (newpadlist);
		162	#if PERL_VERSION_ATLEAST (5,9,0)
		163	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		164	#else
152	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		166	#endif
153	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	167	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
154	--AvFILLp (padlist);	168	--AvFILLp (padlist);
155		169
156	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	170	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
157	av_store (newpadlist, 1, (SV *)newpad);	171	av_store (newpadlist, 1, (SV *)newpad);
158		172
159	return newpadlist;	173	return newpadlist;
160	}	174	}
161		175
162	static void	176	static void
163	free_padlist (pTHX_ AV *padlist)	177	free_padlist (AV *padlist)
164	{	178	{
165	/* may be during global destruction */	179	/* may be during global destruction */
166	if (SvREFCNT (padlist))	180	if (SvREFCNT (padlist))
167	{	181	{
168	I32 i = AvFILLp (padlist);	182	I32 i = AvFILLp (padlist);
…		…
189	AV *padlist;	203	AV *padlist;
190	AV *av = (AV *)mg->mg_obj;	204	AV *av = (AV *)mg->mg_obj;
191		205
192	/* casting is fun. */	206	/* casting is fun. */
193	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	207	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
194	free_padlist (aTHX_ padlist);	208	free_padlist (padlist);
195		209
196	SvREFCNT_dec (av);	210	SvREFCNT_dec (av);
197		211
198	return 0;	212	return 0;
199	}	213	}
200		214
201	#define PERL_MAGIC_coro PERL_MAGIC_ext	215	#define PERL_MAGIC_coro PERL_MAGIC_ext
202		216
203	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	217	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
204		218
		219	#define CORO_MAGIC(cv) \
		220	SvMAGIC (cv) \
		221	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		222	? SvMAGIC (cv) \
		223	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		224	: 0
		225
205	/* the next two functions merely cache the padlists */	226	/* the next two functions merely cache the padlists */
206	static void	227	static void
207	get_padlist (pTHX_ CV *cv)	228	get_padlist (CV *cv)
208	{	229	{
209	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	230	MAGIC *mg = CORO_MAGIC (cv);
		231	AV *av;
210		232
211	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	233	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
212	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	234	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
213	else	235	else
214	{	236	{
215	#if 0	237	#if 0
216	/* this should work - but it doesn't :( */	238	/* this is probably cleaner, but also slower? */
217	CV *cp = Perl_cv_clone (aTHX_ cv);	239	CV *cp = Perl_cv_clone (cv);
218	CvPADLIST (cv) = CvPADLIST (cp);	240	CvPADLIST (cv) = CvPADLIST (cp);
219	CvPADLIST (cp) = 0;	241	CvPADLIST (cp) = 0;
220	SvREFCNT_dec (cp);	242	SvREFCNT_dec (cp);
221	#else	243	#else
222	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	244	CvPADLIST (cv) = coro_clone_padlist (cv);
223	#endif	245	#endif
224	}	246	}
225	}	247	}
226		248
227	static void	249	static void
228	put_padlist (pTHX_ CV *cv)	250	put_padlist (CV *cv)
229	{	251	{
230	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	252	MAGIC *mg = CORO_MAGIC (cv);
		253	AV *av;
231		254
232	if (!mg)	255	if (!mg)
233	{	256	{
234	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	257	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
235	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	258	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
236	mg->mg_virtual = &vtbl_coro;	259	mg->mg_virtual = &vtbl_coro;
237	mg->mg_obj = (SV *)newAV ();	260	mg->mg_obj = (SV *)newAV ();
238	}	261	}
239		262
240	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	263	av = (AV *)mg->mg_obj;
		264
		265	if (AvFILLp (av) >= AvMAX (av))
		266	av_extend (av, AvMAX (av) + 1);
		267
		268	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
241	}	269	}
242		270
243	#define SB do {	271	#define SB do {
244	#define SE } while (0)	272	#define SE } while (0)
245		273
246	#define LOAD(state) load_state(aTHX_ (state));	274	#define LOAD(state) load_state((state));
247	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	275	#define SAVE(state,flags) save_state((state),(flags));
248		276
249	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	277	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
250		278
251	static void	279	static void
252	load_state(pTHX_ Coro__State c)	280	load_state(Coro__State c)
253	{	281	{
254	PL_dowarn = c->dowarn;	282	#define VAR(name,type) PL_ ## name = c->name;
255	PL_in_eval = c->in_eval;	283	# include "state.h"
256		284	#undef VAR
257	PL_curstackinfo = c->curstackinfo;
258	PL_curstack = c->curstack;
259	PL_mainstack = c->mainstack;
260	PL_stack_sp = c->stack_sp;
261	PL_op = c->op;
262	PL_curpad = c->curpad;
263	PL_comppad = c->comppad;
264	PL_compcv = c->compcv;
265	PL_stack_base = c->stack_base;
266	PL_stack_max = c->stack_max;
267	PL_tmps_stack = c->tmps_stack;
268	PL_tmps_floor = c->tmps_floor;
269	PL_tmps_ix = c->tmps_ix;
270	PL_tmps_max = c->tmps_max;
271	PL_markstack = c->markstack;
272	PL_markstack_ptr = c->markstack_ptr;
273	PL_markstack_max = c->markstack_max;
274	PL_scopestack = c->scopestack;
275	PL_scopestack_ix = c->scopestack_ix;
276	PL_scopestack_max = c->scopestack_max;
277	PL_savestack = c->savestack;
278	PL_savestack_ix = c->savestack_ix;
279	PL_savestack_max = c->savestack_max;
280	#if PERL_VERSION < 9
281	PL_retstack = c->retstack;
282	PL_retstack_ix = c->retstack_ix;
283	PL_retstack_max = c->retstack_max;
284	#endif
285	PL_curpm = c->curpm;
286	PL_curcop = c->curcop;
287	PL_top_env = c->top_env;
288		285
289	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	286	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
290	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	287	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
291	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	288	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
292		289
…		…
295	CV *cv;	292	CV *cv;
296		293
297	/* now do the ugly restore mess */	294	/* now do the ugly restore mess */
298	while ((cv = (CV *)POPs))	295	while ((cv = (CV *)POPs))
299	{	296	{
300	AV *padlist = (AV *)POPs;
301
302	if (padlist)
303	{
304	put_padlist (aTHX_ cv); /* mark this padlist as available */	297	put_padlist (cv); /* mark this padlist as available */
305	CvPADLIST(cv) = padlist;	298	CvDEPTH (cv) = PTR2IV (POPs);
306	}	299	CvPADLIST (cv) = (AV *)POPs;
307
308	++CvDEPTH(cv);
309	}	300	}
310		301
311	PUTBACK;	302	PUTBACK;
312	}	303	}
313	}	304	}
314		305
315	static void	306	static void
316	save_state(pTHX_ Coro__State c, int flags)	307	save_state(Coro__State c, int flags)
317	{	308	{
318	{	309	{
319	dSP;	310	dSP;
320	I32 cxix = cxstack_ix;	311	I32 cxix = cxstack_ix;
321	PERL_CONTEXT *ccstk = cxstack;	312	PERL_CONTEXT *ccstk = cxstack;
…		…
335	PERL_CONTEXT *cx = &ccstk[cxix--];	326	PERL_CONTEXT *cx = &ccstk[cxix--];
336		327
337	if (CxTYPE(cx) == CXt_SUB)	328	if (CxTYPE(cx) == CXt_SUB)
338	{	329	{
339	CV *cv = cx->blk_sub.cv;	330	CV *cv = cx->blk_sub.cv;
		331
340	if (CvDEPTH(cv))	332	if (CvDEPTH (cv))
341	{	333	{
342	EXTEND (SP, CvDEPTH(cv)*2);	334	EXTEND (SP, 3);
343
344	while (--CvDEPTH(cv))
345	{
346	/* this tells the restore code to increment CvDEPTH */
347	PUSHs (Nullsv);
348	PUSHs ((SV *)cv);
349	}
350		335
351	PUSHs ((SV *)CvPADLIST(cv));	336	PUSHs ((SV *)CvPADLIST(cv));
		337	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
352	PUSHs ((SV *)cv);	338	PUSHs ((SV *)cv);
353		339
		340	CvDEPTH (cv) = 0;
354	get_padlist (aTHX_ cv);	341	get_padlist (cv);
355	}	342	}
356	}	343	}
357	#ifdef CXt_FORMAT	344	#ifdef CXt_FORMAT
358	else if (CxTYPE(cx) == CXt_FORMAT)	345	else if (CxTYPE(cx) == CXt_FORMAT)
359	{	346	{
…		…
377		364
378	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	365	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
379	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	366	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
380	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	367	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
381		368
382	c->dowarn = PL_dowarn;	369	#define VAR(name,type)c->name = PL_ ## name;
383	c->in_eval = PL_in_eval;	370	# include "state.h"
384		371	#undef VAR
385	c->curstackinfo = PL_curstackinfo;
386	c->curstack = PL_curstack;
387	c->mainstack = PL_mainstack;
388	c->stack_sp = PL_stack_sp;
389	c->op = PL_op;
390	c->curpad = PL_curpad;
391	c->comppad = PL_comppad;
392	c->compcv = PL_compcv;
393	c->stack_base = PL_stack_base;
394	c->stack_max = PL_stack_max;
395	c->tmps_stack = PL_tmps_stack;
396	c->tmps_floor = PL_tmps_floor;
397	c->tmps_ix = PL_tmps_ix;
398	c->tmps_max = PL_tmps_max;
399	c->markstack = PL_markstack;
400	c->markstack_ptr = PL_markstack_ptr;
401	c->markstack_max = PL_markstack_max;
402	c->scopestack = PL_scopestack;
403	c->scopestack_ix = PL_scopestack_ix;
404	c->scopestack_max = PL_scopestack_max;
405	c->savestack = PL_savestack;
406	c->savestack_ix = PL_savestack_ix;
407	c->savestack_max = PL_savestack_max;
408	#if PERL_VERSION < 9
409	c->retstack = PL_retstack;
410	c->retstack_ix = PL_retstack_ix;
411	c->retstack_max = PL_retstack_max;
412	#endif
413	c->curpm = PL_curpm;
414	c->curcop = PL_curcop;
415	c->top_env = PL_top_env;
416	}	372	}
417		373
418	/*	374	/*
419	* allocate various perl stacks. This is an exact copy	375	* allocate various perl stacks. This is an exact copy
420	* of perl.c:init_stacks, except that it uses less memory	376	* of perl.c:init_stacks, except that it uses less memory
421	* on the (sometimes correct) assumption that coroutines do	377	* on the (sometimes correct) assumption that coroutines do
422	* not usually need a lot of stackspace.	378	* not usually need a lot of stackspace.
423	*/	379	*/
424	static void	380	static void
425	coro_init_stacks (pTHX)	381	coro_init_stacks ()
426	{	382	{
427	LOCK;
428
429	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	383	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
430	PL_curstackinfo->si_type = PERLSI_MAIN;	384	PL_curstackinfo->si_type = PERLSI_MAIN;
431	PL_curstack = PL_curstackinfo->si_stack;	385	PL_curstack = PL_curstackinfo->si_stack;
432	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	386	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
433		387
…		…
454		408
455	New(54,PL_savestack,96,ANY);	409	New(54,PL_savestack,96,ANY);
456	PL_savestack_ix = 0;	410	PL_savestack_ix = 0;
457	PL_savestack_max = 96;	411	PL_savestack_max = 96;
458		412
459	#if PERL_VERSION < 9	413	#if !PERL_VERSION_ATLEAST (5,9,0)
460	New(54,PL_retstack,8,OP*);	414	New(54,PL_retstack,8,OP*);
461	PL_retstack_ix = 0;	415	PL_retstack_ix = 0;
462	PL_retstack_max = 8;	416	PL_retstack_max = 8;
463	#endif	417	#endif
464
465	UNLOCK;
466	}	418	}
467		419
468	/*	420	/*
469	* destroy the stacks, the callchain etc...	421	* destroy the stacks, the callchain etc...
470	*/	422	*/
471	static void	423	static void
472	destroy_stacks(pTHX)	424	coro_destroy_stacks ()
473	{	425	{
474	if (!IN_DESTRUCT)	426	if (!IN_DESTRUCT)
475	{	427	{
476	/* is this ugly, I ask? */	428	/* is this ugly, I ask? */
477	LEAVE_SCOPE (0);	429	LEAVE_SCOPE (0);
…		…
508		460
509	Safefree (PL_tmps_stack);	461	Safefree (PL_tmps_stack);
510	Safefree (PL_markstack);	462	Safefree (PL_markstack);
511	Safefree (PL_scopestack);	463	Safefree (PL_scopestack);
512	Safefree (PL_savestack);	464	Safefree (PL_savestack);
513	#if PERL_VERSION < 9	465	#if !PERL_VERSION_ATLEAST (5,9,0)
514	Safefree (PL_retstack);	466	Safefree (PL_retstack);
515	#endif	467	#endif
516	}	468	}
517		469
518	static void	470	static void
519	allocate_stack (Coro__State ctx, int alloc)	471	setup_coro (struct coro *coro)
520	{
521	coro_stack *stack;
522
523	New (0, stack, 1, coro_stack);
524
525	stack->refcnt = 1;
526	stack->usecnt = 1;
527	stack->gencnt = ctx->gencnt = 0;
528
529	if (alloc)
530	{
531	#if HAVE_MMAP
532	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
533	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
534	if (stack->sptr == (void *)-1)
535	#endif
536	{
537	stack->ssize = - (STACKSIZE * (long)sizeof (long));
538	New (0, stack->sptr, STACKSIZE, long);
539	}
540	}
541	else
542	stack->sptr = 0;
543
544	ctx->stack = stack;
545	}
546
547	static void
548	deallocate_stack (Coro__State ctx)
549	{
550	coro_stack *stack = ctx->stack;
551
552	ctx->stack = 0;
553
554	if (stack)
555	{
556	if (!--stack->refcnt)
557	{
558	#ifdef HAVE_MMAP
559	if (stack->ssize > 0 && stack->sptr)
560	munmap (stack->sptr, stack->ssize);
561	else
562	#endif
563	Safefree (stack->sptr);
564
565	Safefree (stack);
566	}
567	else if (ctx->gencnt == stack->gencnt)
568	--stack->usecnt;
569	}
570	}
571
572	static void
573	setup_coro (void *arg)
574	{	472	{
575	/*	473	/*
576	* emulate part of the perl startup here.	474	* emulate part of the perl startup here.
577	*/	475	*/
578	dTHX;
579	dSP;
580	Coro__State ctx = (Coro__State)arg;
581	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
582		476
583	coro_init_stacks (aTHX);	477	coro_init_stacks ();
		478
584	/*PL_curcop = 0;*/	479	PL_curcop = 0;
585	/*PL_in_eval = PL_in_eval;*/ /* inherit */	480	PL_in_eval = 0;
		481	PL_curpm = 0;
		482
		483	{
		484	dSP;
		485	LOGOP myop;
		486
		487	/* I have no idea why this is needed, but it is */
		488	PUSHMARK (SP);
		489
586	SvREFCNT_dec (GvAV (PL_defgv));	490	SvREFCNT_dec (GvAV (PL_defgv));
587	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	491	GvAV (PL_defgv) = coro->args; coro->args = 0;
588		492
589	SPAGAIN;
590
591	if (ctx->stack)
592	{
593	ctx->cursp = 0;
594
595	PUSHMARK(SP);
596	PUTBACK;
597	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
598
599	if (SvTRUE (ERRSV))
600	croak (NULL);
601	else
602	croak ("FATAL: CCTXT coroutine returned!");
603	}
604	else
605	{
606	UNOP myop;
607
608	PL_op = (OP *)&myop;
609
610	Zero(&myop, 1, UNOP);	493	Zero (&myop, 1, LOGOP);
611	myop.op_next = Nullop;	494	myop.op_next = Nullop;
612	myop.op_flags = OPf_WANT_VOID;	495	myop.op_flags = OPf_WANT_VOID;
613		496
		497	PL_op = (OP *)&myop;
		498
614	PUSHMARK(SP);	499	PUSHMARK (SP);
615	XPUSHs (sub_init);	500	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
616	/*
617	* the next line is slightly wrong, as PL_op->op_next
618	* is actually being executed so we skip the first op.
619	* that doesn't matter, though, since it is only
620	* pp_nextstate and we never return...
621	* ah yes, and I don't care anyways ;)
622	*/
623	PUTBACK;	501	PUTBACK;
624	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	502	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
625	SPAGAIN;	503	SPAGAIN;
626		504
627	ENTER; /* necessary e.g. for dounwind */	505	ENTER; /* necessary e.g. for dounwind */
628	}	506	}
629	}	507	}
630		508
631	static void	509	static void
632	continue_coro (void *arg)	510	free_coro_mortal ()
633	{	511	{
634	/*
635	* this is a _very_ stripped down perl interpreter ;)
636	*/
637	dTHX;
638	Coro__State ctx = (Coro__State)arg;
639
640	PL_top_env = &ctx->start_env;
641
642	ctx->cursp = 0;
643	PL_op = PL_op->op_next;
644	CALLRUNOPS(aTHX);
645
646	abort ();
647	}
648
649	static void
650	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
651	{
652	dSTACKLEVEL;
653
654	if (prev != next)
655	{
656	if (next->mainstack)
657	{
658	LOCK;
659	SAVE (prev, flags);
660	LOAD (next);
661	UNLOCK;
662
663	/* mark this state as in-use */
664	next->mainstack = 0;
665	next->tmps_ix = -2;
666
667	/* stacklevel changed? if yes, grab the stack for us! */
668	if (flags & TRANSFER_SAVE_CCTXT)
669	{
670	if (!prev->stack)
671	allocate_stack (prev, 0);
672	else if (prev->cursp != stacklevel
673	&& prev->stack->usecnt > 1)
674	{
675	prev->gencnt = ++prev->stack->gencnt;
676	prev->stack->usecnt = 1;
677	}
678
679	/* has our stack been invalidated? */
680	if (next->stack && next->stack->gencnt != next->gencnt)
681	{
682	deallocate_stack (next);
683	allocate_stack (next, 1);
684	coro_create (&(next->stack->cctx),
685	continue_coro, (void *)next,
686	next->stack->sptr, labs (next->stack->ssize));
687	}
688
689	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
690	prev->cursp = stacklevel;
691	/* don't add any code here */
692	}
693	else
694	next->cursp = stacklevel;
695	}
696	else if (next->tmps_ix == -2)
697	croak ("tried to transfer to running coroutine");
698	else
699	{
700	LOCK;
701	SAVE (prev, -1); /* first get rid of the old state */
702	UNLOCK;
703
704	if (flags & TRANSFER_SAVE_CCTXT)
705	{
706	if (!prev->stack)
707	allocate_stack (prev, 0);
708
709	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
710	{
711	PL_top_env = &next->start_env;
712
713	setup_coro (next);
714	next->cursp = stacklevel;
715
716	prev->stack->refcnt++;
717	prev->stack->usecnt++;
718	next->stack = prev->stack;
719	next->gencnt = prev->gencnt;
720	}
721	else
722	{
723	assert (!next->stack);
724	allocate_stack (next, 1);
725	coro_create (&(next->stack->cctx),
726	setup_coro, (void *)next,
727	next->stack->sptr, labs (next->stack->ssize));
728	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
729	prev->cursp = stacklevel;
730	/* don't add any code here */
731	}
732	}
733	else
734	{
735	setup_coro (next);
736	next->cursp = stacklevel;
737	}
738	}
739	}
740
741	LOCK;
742	if (coro_mortal)	512	if (coro_mortal)
743	{	513	{
744	SvREFCNT_dec (coro_mortal);	514	SvREFCNT_dec (coro_mortal);
745	coro_mortal = 0;	515	coro_mortal = 0;
746	}	516	}
		517	}
		518
		519	static void NOINLINE
		520	prepare_cctx (coro_cctx *cctx)
		521	{
		522	dSP;
		523	LOGOP myop;
		524
		525	Zero (&myop, 1, LOGOP);
		526	myop.op_next = PL_op;
		527	myop.op_flags = OPf_WANT_VOID;
		528
		529	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		530
		531	PUSHMARK (SP);
		532	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		533	PUTBACK;
		534	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		535	SPAGAIN;
		536	}
		537
		538	static void
		539	coro_run (void *arg)
		540	{
		541	/* coro_run is the alternative epilogue of transfer() */
747	UNLOCK;	542	UNLOCK;
748	}
749		543
750	#define SV_CORO(sv,func) \	544	/*
751	do { \	545	* this is a _very_ stripped down perl interpreter ;)
752	if (SvROK (sv)) \	546	*/
753	sv = SvRV (sv); \	547	PL_top_env = &PL_start_env;
754	\
755	if (SvTYPE (sv) == SVt_PVHV) \
756	{ \
757	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
758	\
759	if (!he) \
760	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
761	\
762	(sv) = SvRV (HeVAL(he)); \
763	} \
764	\
765	/* must also be changed inside Coro::Cont::yield */ \
766	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
767	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
768	\
769	} while(0)
770		548
771	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	549	/* inject call to cctx_init */
		550	prepare_cctx ((coro_cctx *)arg);
772		551
		552	/* somebody will hit me for both perl_run and PL_restartop */
		553	perl_run (PL_curinterp);
		554
		555	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		556	abort ();
		557	}
		558
		559	static coro_cctx *
		560	cctx_new ()
		561	{
		562	coro_cctx *cctx;
		563
		564	++cctx_count;
		565
		566	New (0, cctx, 1, coro_cctx);
		567
		568	#if HAVE_MMAP
		569
		570	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		571	/* mmap suppsedly does allocate-on-write for us */
		572	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		573
		574	if (cctx->sptr == (void *)-1)
		575	{
		576	perror ("FATAL: unable to mmap stack for coroutine");
		577	_exit (EXIT_FAILURE);
		578	}
		579
		580	# if STACKGUARD
		581	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		582	# endif
		583
		584	#else
		585
		586	cctx->ssize = STACKSIZE * (long)sizeof (long);
		587	New (0, cctx->sptr, STACKSIZE, long);
		588
		589	if (!cctx->sptr)
		590	{
		591	perror ("FATAL: unable to malloc stack for coroutine");
		592	_exit (EXIT_FAILURE);
		593	}
		594
		595	#endif
		596
		597	#if USE_VALGRIND
		598	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		599	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		600	cctx->ssize + (char *)cctx->sptr
		601	);
		602	#endif
		603
		604	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		605
		606	return cctx;
		607	}
		608
		609	static void
		610	cctx_free (coro_cctx *cctx)
		611	{
		612	if (!cctx)
		613	return;
		614
		615	--cctx_count;
		616
		617	#if USE_VALGRIND
		618	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		619	#endif
		620
		621	#if HAVE_MMAP
		622	munmap (cctx->sptr, cctx->ssize);
		623	#else
		624	Safefree (cctx->sptr);
		625	#endif
		626
		627	Safefree (cctx);
		628	}
		629
		630	static coro_cctx *
		631	cctx_get ()
		632	{
		633	coro_cctx *cctx;
		634
		635	if (cctx_first)
		636	{
		637	--cctx_idle;
		638	cctx = cctx_first;
		639	cctx_first = cctx->next;
		640	}
		641	else
		642	{
		643	cctx = cctx_new ();
		644	PL_op = PL_op->op_next;
		645	}
		646
		647	return cctx;
		648	}
		649
		650	static void
		651	cctx_put (coro_cctx *cctx)
		652	{
		653	++cctx_idle;
		654	cctx->next = cctx_first;
		655	cctx_first = cctx;
		656	}
		657
		658	/* never call directly, always through the coro_state_transfer global variable */
		659	static void NOINLINE
		660	transfer (struct coro *prev, struct coro *next, int flags)
		661	{
		662	dSTACKLEVEL;
		663
		664	/* sometimes transfer is only called to set idle_sp */
		665	if (flags == TRANSFER_SET_STACKLEVEL)
		666	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		667	else if (prev != next)
		668	{
		669	coro_cctx *prev__cctx;
		670
		671	LOCK;
		672
		673	if (next->mainstack)
		674	{
		675	/* coroutine already started */
		676	SAVE (prev, flags);
		677	LOAD (next);
		678	}
		679	else
		680	{
		681	/* need to start coroutine */
		682	/* first get rid of the old state */
		683	SAVE (prev, -1);
		684	/* setup coroutine call */
		685	setup_coro (next);
		686	/* need a stack */
		687	next->cctx = 0;
		688	}
		689
		690	if (!prev->cctx)
		691	/* create a new empty context */
		692	Newz (0, prev->cctx, 1, coro_cctx);
		693
		694	prev__cctx = prev->cctx;
		695
		696	/* possibly "free" the cctx */
		697	if (prev__cctx->idle_sp == STACKLEVEL)
		698	{
		699	cctx_put (prev__cctx);
		700	prev->cctx = 0;
		701	}
		702
		703	if (!next->cctx)
		704	next->cctx = cctx_get ();
		705
		706	if (prev__cctx != next->cctx)
		707	{
		708	prev__cctx->top_env = PL_top_env;
		709	PL_top_env = next->cctx->top_env;
		710	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		711	}
		712
		713	free_coro_mortal ();
		714
		715	UNLOCK;
		716	}
		717	}
		718
		719	struct transfer_args
		720	{
		721	struct coro *prev, *next;
		722	int flags;
		723	};
		724
		725	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		726
		727	static void
		728	coro_state_destroy (struct coro *coro)
		729	{
		730	if (coro->refcnt--)
		731	return;
		732
		733	if (coro->mainstack && coro->mainstack != main_mainstack)
		734	{
		735	struct coro temp;
		736
		737	SAVE ((&temp), TRANSFER_SAVE_ALL);
		738	LOAD (coro);
		739
		740	coro_destroy_stacks ();
		741
		742	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		743
		744	coro->mainstack = 0;
		745	}
		746
		747	cctx_free (coro->cctx);
		748	SvREFCNT_dec (coro->args);
		749	Safefree (coro);
		750	}
		751
773	static void	752	static int
		753	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		754	{
		755	struct coro *coro = (struct coro *)mg->mg_ptr;
		756	mg->mg_ptr = 0;
		757
		758	coro_state_destroy (coro);
		759
		760	return 0;
		761	}
		762
		763	static int
		764	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		765	{
		766	struct coro *coro = (struct coro *)mg->mg_ptr;
		767
		768	++coro->refcnt;
		769
		770	return 0;
		771	}
		772
		773	static MGVTBL coro_state_vtbl = {
		774	0, 0, 0, 0,
		775	coro_state_clear,
		776	0,
		777	#ifdef MGf_DUP
		778	coro_state_dup,
		779	#else
		780	# define MGf_DUP 0
		781	#endif
		782	};
		783
		784	static struct coro *
		785	SvSTATE (SV *coro)
		786	{
		787	HV *stash;
		788	MAGIC *mg;
		789
		790	if (SvROK (coro))
		791	coro = SvRV (coro);
		792
		793	stash = SvSTASH (coro);
		794	if (stash != coro_stash && stash != coro_state_stash)
		795	{
		796	/* very slow, but rare, check */
		797	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		798	croak ("Coro::State object required");
		799	}
		800
		801	mg = SvMAGIC (coro);
		802	assert (mg->mg_type == PERL_MAGIC_ext);
		803	return (struct coro *)mg->mg_ptr;
		804	}
		805
		806	static void
		807	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		808	{
		809	ta->prev = SvSTATE (prev);
		810	ta->next = SvSTATE (next);
		811	ta->flags = flags;
		812	}
		813
		814	static void
774	api_transfer(pTHX_ SV *prev, SV *next, int flags)	815	api_transfer (SV *prev, SV *next, int flags)
775	{	816	{
776	SV_CORO (prev, "Coro::transfer");	817	dTHX;
777	SV_CORO (next, "Coro::transfer");	818	struct transfer_args ta;
778		819
779	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	820	prepare_transfer (&ta, prev, next, flags);
		821	TRANSFER (ta);
780	}	822	}
781		823
782	/** Coro ********************************************************************/	824	/** Coro ********************************************************************/
783		825
784	#define PRIO_MAX 3	826	#define PRIO_MAX 3
…		…
788	#define PRIO_IDLE -3	830	#define PRIO_IDLE -3
789	#define PRIO_MIN -4	831	#define PRIO_MIN -4
790		832
791	/* for Coro.pm */	833	/* for Coro.pm */
792	static GV *coro_current, *coro_idle;	834	static GV *coro_current, *coro_idle;
793	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	835	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
794	static int coro_nready;	836	static int coro_nready;
795		837
796	static void	838	static void
797	coro_enq (pTHX_ SV *sv)	839	coro_enq (SV *sv)
798	{	840	{
799	SV **xprio;
800	int prio;	841	int prio;
801		842
802	if (SvTYPE (sv) != SVt_PVHV)	843	if (SvTYPE (sv) != SVt_PVHV)
803	croak ("Coro::ready tried to enqueue something that is not a coroutine");	844	croak ("Coro::ready tried to enqueue something that is not a coroutine");
804		845
805	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);	846	prio = SvSTATE (sv)->prio;
806	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
807
808	prio = prio > PRIO_MAX ? PRIO_MAX
809	: prio < PRIO_MIN ? PRIO_MIN
810	: prio;
811		847
812	av_push (coro_ready [prio - PRIO_MIN], sv);	848	av_push (coro_ready [prio - PRIO_MIN], sv);
813	coro_nready++;	849	coro_nready++;
814	}	850	}
815		851
816	static SV *	852	static SV *
817	coro_deq (pTHX_ int min_prio)	853	coro_deq (int min_prio)
818	{	854	{
819	int prio = PRIO_MAX - PRIO_MIN;	855	int prio = PRIO_MAX - PRIO_MIN;
820		856
821	min_prio -= PRIO_MIN;	857	min_prio -= PRIO_MIN;
822	if (min_prio < 0)	858	if (min_prio < 0)
823	min_prio = 0;	859	min_prio = 0;
824		860
825	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	861	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
826	if (av_len (coro_ready[prio]) >= 0)	862	if (AvFILLp (coro_ready [prio]) >= 0)
827	{	863	{
828	coro_nready--;	864	coro_nready--;
829	return av_shift (coro_ready[prio]);	865	return av_shift (coro_ready [prio]);
830	}	866	}
831		867
832	return 0;	868	return 0;
833	}	869	}
834		870
…		…
839		875
840	if (SvROK (coro))	876	if (SvROK (coro))
841	coro = SvRV (coro);	877	coro = SvRV (coro);
842		878
843	LOCK;	879	LOCK;
844	coro_enq (aTHX_ SvREFCNT_inc (coro));	880	coro_enq (SvREFCNT_inc (coro));
845	UNLOCK;	881	UNLOCK;
846	}	882	}
847		883
848	static void	884	static void
		885	prepare_schedule (struct transfer_args *ta)
		886	{
		887	SV *current, *prev, *next;
		888
		889	current = GvSV (coro_current);
		890
		891	for (;;)
		892	{
		893	LOCK;
		894	next = coro_deq (PRIO_MIN);
		895	UNLOCK;
		896
		897	if (next)
		898	break;
		899
		900	{
		901	dSP;
		902
		903	ENTER;
		904	SAVETMPS;
		905
		906	PUSHMARK (SP);
		907	PUTBACK;
		908	call_sv (GvSV (coro_idle), G_DISCARD);
		909
		910	FREETMPS;
		911	LEAVE;
		912	}
		913	}
		914
		915	prev = SvRV (current);
		916	SvRV (current) = next;
		917
		918	/* free this only after the transfer */
		919	LOCK;
		920	free_coro_mortal ();
		921	UNLOCK;
		922	coro_mortal = prev;
		923
		924	ta->prev = SvSTATE (prev);
		925	ta->next = SvSTATE (next);
		926	ta->flags = TRANSFER_SAVE_ALL;
		927	}
		928
		929	static void
		930	prepare_cede (struct transfer_args *ta)
		931	{
		932	LOCK;
		933	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		934	UNLOCK;
		935
		936	prepare_schedule (ta);
		937	}
		938
		939	static void
849	api_schedule (void)	940	api_schedule (void)
850	{	941	{
851	dTHX;	942	dTHX;
		943	struct transfer_args ta;
852		944
853	SV *prev, *next;	945	prepare_schedule (&ta);
854		946	TRANSFER (ta);
855	LOCK;
856
857	prev = SvRV (GvSV (coro_current));
858	next = coro_deq (aTHX_ PRIO_MIN);
859
860	if (!next)
861	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
862
863	/* free this only after the transfer */
864	coro_mortal = prev;
865	SV_CORO (prev, "Coro::schedule");
866
867	SvRV (GvSV (coro_current)) = next;
868
869	SV_CORO (next, "Coro::schedule");
870
871	UNLOCK;
872
873	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
874	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
875	}	947	}
876		948
877	static void	949	static void
878	api_cede (void)	950	api_cede (void)
879	{	951	{
880	dTHX;	952	dTHX;
		953	struct transfer_args ta;
881		954
882	LOCK;	955	prepare_cede (&ta);
883	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	956	TRANSFER (ta);
884	UNLOCK;
885
886	api_schedule ();
887	}	957	}
888		958
889	MODULE = Coro::State PACKAGE = Coro::State	959	MODULE = Coro::State PACKAGE = Coro::State
890		960
891	PROTOTYPES: ENABLE	961	PROTOTYPES: DISABLE
892		962
893	BOOT:	963	BOOT:
894	{ /* {} necessary for stoopid perl-5.6.x */	964	{
895	#ifdef USE_ITHREADS	965	#ifdef USE_ITHREADS
896	MUTEX_INIT (&coro_mutex);	966	MUTEX_INIT (&coro_mutex);
897	#endif	967	#endif
		968	BOOT_PAGESIZE;
898		969
899	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
900	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
901	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	970	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
902		971
903	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	972	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
904	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	973	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
905	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	974	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
906	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
907		975
908	main_mainstack = PL_mainstack;	976	main_mainstack = PL_mainstack;
909		977
910	coroapi.ver = CORO_API_VERSION;	978	coroapi.ver = CORO_API_VERSION;
911	coroapi.transfer = api_transfer;	979	coroapi.transfer = api_transfer;
912	}
913		980
914	Coro::State	981	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
915	_newprocess(args)	982	}
916	SV * args	983
917	PROTOTYPE: $	984	SV *
		985	new (char *klass, ...)
918	CODE:	986	CODE:
919	Coro__State coro;	987	{
		988	struct coro *coro;
		989	HV *hv;
		990	int i;
920		991
921	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
922	croak ("Coro::State::_newprocess expects an arrayref");
923
924	Newz (0, coro, 1, struct coro);	992	Newz (0, coro, 1, struct coro);
		993	coro->args = newAV ();
925		994
926	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	995	hv = newHV ();
927	/*coro->mainstack = 0; *//*actual work is done inside transfer */	996	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
928	/*coro->stack = 0;*/	997	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
929		998
930	/* same as JMPENV_BOOTSTRAP */	999	for (i = 1; i < items; i++)
931	/* we might be able to recycle start_env, but safe is safe */	1000	av_push (coro->args, newSVsv (ST (i)));
932	/*Zero(&coro->start_env, 1, JMPENV);*/	1001	}
933	coro->start_env.je_ret = -1;
934	coro->start_env.je_mustcatch = TRUE;
935
936	RETVAL = coro;
937	OUTPUT:	1002	OUTPUT:
938	RETVAL	1003	RETVAL
939		1004
940	void	1005	void
941	transfer(prev, next, flags)	1006	_set_stacklevel (...)
942	SV *prev	1007	ALIAS:
943	SV *next	1008	Coro::State::transfer = 1
944	int flags	1009	Coro::schedule = 2
945	PROTOTYPE: @	1010	Coro::cede = 3
		1011	Coro::Cont::yield = 4
946	CODE:	1012	CODE:
947	PUTBACK;	1013	{
948	SV_CORO (next, "Coro::transfer");	1014	struct transfer_args ta;
949	SV_CORO (prev, "Coro::transfer");	1015
950	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1016	switch (ix)
951	SPAGAIN;	1017	{
		1018	case 0:
		1019	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1020	ta.next = 0;
		1021	ta.flags = TRANSFER_SET_STACKLEVEL;
		1022	break;
		1023
		1024	case 1:
		1025	if (items != 3)
		1026	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1027
		1028	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1029	break;
		1030
		1031	case 2:
		1032	prepare_schedule (&ta);
		1033	break;
		1034
		1035	case 3:
		1036	prepare_cede (&ta);
		1037	break;
		1038
		1039	case 4:
		1040	{
		1041	SV *yieldstack;
		1042	SV *sv;
		1043	AV *defav = GvAV (PL_defgv);
		1044
		1045	yieldstack = *hv_fetch (
		1046	(HV *)SvRV (GvSV (coro_current)),
		1047	"yieldstack", sizeof ("yieldstack") - 1,
		1048	0
		1049	);
		1050
		1051	/* set up @_ -- ugly */
		1052	av_clear (defav);
		1053	av_fill (defav, items - 1);
		1054	while (items--)
		1055	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1056
		1057	sv = av_pop ((AV *)SvRV (yieldstack));
		1058	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1059	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1060	ta.flags = 0;
		1061	SvREFCNT_dec (sv);
		1062	}
		1063	break;
		1064
		1065	}
		1066
		1067	TRANSFER (ta);
		1068	}
952		1069
953	void	1070	void
954	DESTROY(coro)	1071	_clone_state_from (SV *dst, SV *src)
955	Coro::State coro	1072	CODE:
956	CODE:	1073	{
		1074	struct coro *coro_src = SvSTATE (src);
957		1075
958	if (coro->mainstack && coro->mainstack != main_mainstack)	1076	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
959	{
960	struct coro temp;
961		1077
962	PUTBACK;	1078	++coro_src->refcnt;
963	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1079	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
964	LOAD (aTHX_ coro);	1080	}
965	SPAGAIN;
966
967	destroy_stacks (aTHX);
968
969	LOAD ((&temp)); /* this will get rid of defsv etc.. */
970	SPAGAIN;
971
972	coro->mainstack = 0;
973	}
974
975	deallocate_stack (coro);
976	SvREFCNT_dec (coro->args);
977	Safefree (coro);
978		1081
979	void	1082	void
980	_exit(code)	1083	_exit (code)
981	int code	1084	int code
982	PROTOTYPE: $	1085	PROTOTYPE: $
983	CODE:	1086	CODE:
984	_exit (code);	1087	_exit (code);
985		1088
986	MODULE = Coro::State PACKAGE = Coro::Cont	1089	int
		1090	cctx_count ()
		1091	CODE:
		1092	RETVAL = cctx_count;
		1093	OUTPUT:
		1094	RETVAL
987		1095
988	# this is slightly dirty (should expose a c-level api)	1096	int
989		1097	cctx_idle ()
990	void	1098	CODE:
991	yield(...)	1099	RETVAL = cctx_idle;
992	PROTOTYPE: @	1100	OUTPUT:
993	CODE:	1101	RETVAL
994	SV *yieldstack;
995	SV *sv;
996	AV *defav = GvAV (PL_defgv);
997	struct coro *prev, *next;
998
999	yieldstack = *hv_fetch (
1000	(HV *)SvRV (GvSV (coro_current)),
1001	"yieldstack", sizeof ("yieldstack") - 1,
1002	0
1003	);
1004
1005	/* set up @_ -- ugly */
1006	av_clear (defav);
1007	av_fill (defav, items - 1);
1008	while (items--)
1009	av_store (defav, items, SvREFCNT_inc (ST(items)));
1010
1011	sv = av_pop ((AV *)SvRV (yieldstack));
1012	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1013	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1014	SvREFCNT_dec (sv);
1015
1016	transfer (aTHX_ prev, next, 0);
1017		1102
1018	MODULE = Coro::State PACKAGE = Coro	1103	MODULE = Coro::State PACKAGE = Coro
1019		1104
1020	# this is slightly dirty (should expose a c-level api)
1021
1022	BOOT:	1105	BOOT:
1023	{	1106	{
1024	int i;	1107	int i;
		1108
1025	HV *stash = gv_stashpv ("Coro", TRUE);	1109	coro_stash = gv_stashpv ("Coro", TRUE);
1026		1110
1027	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1111	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1028	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1112	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1029	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1113	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1030	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1114	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1031	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1115	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1032	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1116	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1033		1117
1034	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1118	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1035	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1119	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1036		1120
1037	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1121	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1045	coroapi.ready = api_ready;	1129	coroapi.ready = api_ready;
1046	coroapi.nready = &coro_nready;	1130	coroapi.nready = &coro_nready;
1047	coroapi.current = coro_current;	1131	coroapi.current = coro_current;
1048		1132
1049	GCoroAPI = &coroapi;	1133	GCoroAPI = &coroapi;
1050	sv_setiv(sv, (IV)&coroapi);	1134	sv_setiv (sv, (IV)&coroapi);
1051	SvREADONLY_on(sv);	1135	SvREADONLY_on (sv);
1052	}	1136	}
1053	}	1137	}
1054		1138
1055	#if !PERL_MICRO	1139	int
		1140	prio (Coro::State coro, int newprio = 0)
		1141	ALIAS:
		1142	nice = 1
		1143	CODE:
		1144	{
		1145	RETVAL = coro->prio;
		1146
		1147	if (items > 1)
		1148	{
		1149	if (ix)
		1150	newprio += coro->prio;
		1151
		1152	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1153	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1154
		1155	coro->prio = newprio;
		1156	}
		1157	}
1056		1158
1057	void	1159	void
1058	ready(self)	1160	ready (SV *self)
1059	SV * self
1060	PROTOTYPE: $	1161	PROTOTYPE: $
1061	CODE:	1162	CODE:
1062	api_ready (self);	1163	api_ready (self);
1063		1164
1064	#endif
1065
1066	int	1165	int
1067	nready(...)	1166	nready (...)
1068	PROTOTYPE:	1167	PROTOTYPE:
1069	CODE:	1168	CODE:
1070	RETVAL = coro_nready;	1169	RETVAL = coro_nready;
1071	OUTPUT:	1170	OUTPUT:
1072	RETVAL	1171	RETVAL
1073		1172
1074	void	1173	MODULE = Coro::State PACKAGE = Coro::AIO
1075	schedule(...)
1076	PROTOTYPE:
1077	CODE:
1078	api_schedule ();
1079		1174
1080	void
1081	cede(...)
1082	PROTOTYPE:
1083	CODE:
1084	api_cede ();
1085
1086	# and these are hacks
1087	SV *	1175	SV *
1088	_aio_get_state ()	1176	_get_state ()
1089	CODE:	1177	CODE:
1090	{	1178	{
1091	struct {	1179	struct {
1092	int errorno;	1180	int errorno;
1093	int laststype;	1181	int laststype;
…		…
1104	}	1192	}
1105	OUTPUT:	1193	OUTPUT:
1106	RETVAL	1194	RETVAL
1107		1195
1108	void	1196	void
1109	_aio_set_state (char *data_)	1197	_set_state (char *data_)
1110	PROTOTYPE: $	1198	PROTOTYPE: $
1111	CODE:	1199	CODE:
1112	{	1200	{
1113	struct {	1201	struct {
1114	int errorno;	1202	int errorno;

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