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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.79 by root, Thu Nov 2 12:29:08 2006 UTC vs.
Revision 1.111 by root, Thu Nov 30 18:21:14 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	int inuse;
		125
		126	#if USE_VALGRIND
		127	int valgrind_id;
		128	#endif
		129	} coro_cctx;
		130
		131	enum {
		132	CF_RUNNING, /* coroutine is running */
		133	CF_READY, /* coroutine is ready */
		134	};
		135
		136	/* this is a structure representing a perl-level coroutine */
104	struct coro {	137	struct coro {
105	/* the top-level JMPENV for each coroutine, needed to catch dies. */	138	/* the c coroutine allocated to this perl coroutine, if any */
106	JMPENV start_env;	139	coro_cctx *cctx;
107		140
108	/* the optional C context */	141	/* data associated with this coroutine (initial args) */
109	coro_stack *stack;	142	AV *args;
110	void *cursp;
111	int gencnt;	143	int refcnt;
		144	int flags;
112		145
113	/* optionally saved, might be zero */	146	/* optionally saved, might be zero */
114	AV *defav;	147	AV *defav;
115	SV *defsv;	148	SV *defsv;
116	SV *errsv;	149	SV *errsv;
117		150
118	/* saved global state not related to stacks */	151	#define VAR(name,type) type name;
119	U8 dowarn;	152	# include "state.h"
120	I32 in_eval;	153	#undef VAR
121		154
122	/* the stacks and related info (callchain etc..) */	155	/* coro process data */
123	PERL_SI *curstackinfo;	156	int prio;
124	AV *curstack;
125	AV *mainstack;
126	SV **stack_sp;
127	OP *op;
128	SV **curpad;
129	AV *comppad;
130	CV *compcv;
131	SV **stack_base;
132	SV **stack_max;
133	SV **tmps_stack;
134	I32 tmps_floor;
135	I32 tmps_ix;
136	I32 tmps_max;
137	I32 *markstack;
138	I32 *markstack_ptr;
139	I32 *markstack_max;
140	I32 *scopestack;
141	I32 scopestack_ix;
142	I32 scopestack_max;
143	ANY *savestack;
144	I32 savestack_ix;
145	I32 savestack_max;
146	OP **retstack;
147	I32 retstack_ix;
148	I32 retstack_max;
149	PMOP *curpm;
150	COP *curcop;
151	JMPENV *top_env;
152
153	/* data associated with this coroutine (initial args) */
154	AV *args;
155	};	157	};
156		158
157	typedef struct coro *Coro__State;	159	typedef struct coro *Coro__State;
158	typedef struct coro *Coro__State_or_hashref;	160	typedef struct coro *Coro__State_or_hashref;
159		161
160	static AV *	162	static AV *
161	coro_clone_padlist (pTHX_ CV *cv)	163	coro_clone_padlist (CV *cv)
162	{	164	{
163	AV *padlist = CvPADLIST (cv);	165	AV *padlist = CvPADLIST (cv);
164	AV *newpadlist, *newpad;	166	AV *newpadlist, *newpad;
165		167
166	newpadlist = newAV ();	168	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	169	AvREAL_off (newpadlist);
168	#if PERL_VERSION < 9	170	#if PERL_VERSION_ATLEAST (5,9,0)
		171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		172	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	173	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
170	#else
171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172	#endif	174	#endif
173	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	175	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
174	--AvFILLp (padlist);	176	--AvFILLp (padlist);
175		177
176	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	178	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
178		180
179	return newpadlist;	181	return newpadlist;
180	}	182	}
181		183
182	static void	184	static void
183	free_padlist (pTHX_ AV *padlist)	185	free_padlist (AV *padlist)
184	{	186	{
185	/* may be during global destruction */	187	/* may be during global destruction */
186	if (SvREFCNT (padlist))	188	if (SvREFCNT (padlist))
187	{	189	{
188	I32 i = AvFILLp (padlist);	190	I32 i = AvFILLp (padlist);
…		…
209	AV *padlist;	211	AV *padlist;
210	AV *av = (AV *)mg->mg_obj;	212	AV *av = (AV *)mg->mg_obj;
211		213
212	/* casting is fun. */	214	/* casting is fun. */
213	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	215	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
214	free_padlist (aTHX_ padlist);	216	free_padlist (padlist);
215		217
216	SvREFCNT_dec (av);	218	SvREFCNT_dec (av);
217		219
218	return 0;	220	return 0;
219	}	221	}
220		222
221	#define PERL_MAGIC_coro PERL_MAGIC_ext	223	#define PERL_MAGIC_coro PERL_MAGIC_ext
222		224
223	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
224		226
		227	#define CORO_MAGIC(cv) \
		228	SvMAGIC (cv) \
		229	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		230	? SvMAGIC (cv) \
		231	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		232	: 0
		233
225	/* the next two functions merely cache the padlists */	234	/* the next two functions merely cache the padlists */
226	static void	235	static void
227	get_padlist (pTHX_ CV *cv)	236	get_padlist (CV *cv)
228	{	237	{
229	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	238	MAGIC *mg = CORO_MAGIC (cv);
		239	AV *av;
230		240
231	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	241	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
232	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	242	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
233	else	243	else
234	{	244	{
235	#if 0	245	#if 0
236	/* this should work - but it doesn't :( */	246	/* this is probably cleaner, but also slower? */
237	CV *cp = Perl_cv_clone (aTHX_ cv);	247	CV *cp = Perl_cv_clone (cv);
238	CvPADLIST (cv) = CvPADLIST (cp);	248	CvPADLIST (cv) = CvPADLIST (cp);
239	CvPADLIST (cp) = 0;	249	CvPADLIST (cp) = 0;
240	SvREFCNT_dec (cp);	250	SvREFCNT_dec (cp);
241	#else	251	#else
242	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	252	CvPADLIST (cv) = coro_clone_padlist (cv);
243	#endif	253	#endif
244	}	254	}
245	}	255	}
246		256
247	static void	257	static void
248	put_padlist (pTHX_ CV *cv)	258	put_padlist (CV *cv)
249	{	259	{
250	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	260	MAGIC *mg = CORO_MAGIC (cv);
		261	AV *av;
251		262
252	if (!mg)	263	if (!mg)
253	{	264	{
254	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	265	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
255	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	266	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
256	mg->mg_virtual = &vtbl_coro;	267	mg->mg_virtual = &vtbl_coro;
257	mg->mg_obj = (SV *)newAV ();	268	mg->mg_obj = (SV *)newAV ();
258	}	269	}
259		270
260	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	271	av = (AV *)mg->mg_obj;
		272
		273	if (AvFILLp (av) >= AvMAX (av))
		274	av_extend (av, AvMAX (av) + 1);
		275
		276	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
261	}	277	}
262		278
263	#define SB do {	279	#define SB do {
264	#define SE } while (0)	280	#define SE } while (0)
265		281
266	#define LOAD(state) load_state(aTHX_ (state));	282	#define LOAD(state) load_state((state));
267	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	283	#define SAVE(state,flags) save_state((state),(flags));
268		284
269	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	285	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
270		286
271	static void	287	static void
272	load_state(pTHX_ Coro__State c)	288	load_state(Coro__State c)
273	{	289	{
274	PL_dowarn = c->dowarn;	290	#define VAR(name,type) PL_ ## name = c->name;
275	PL_in_eval = c->in_eval;	291	# include "state.h"
276		292	#undef VAR
277	PL_curstackinfo = c->curstackinfo;
278	PL_curstack = c->curstack;
279	PL_mainstack = c->mainstack;
280	PL_stack_sp = c->stack_sp;
281	PL_op = c->op;
282	PL_curpad = c->curpad;
283	PL_comppad = c->comppad;
284	PL_compcv = c->compcv;
285	PL_stack_base = c->stack_base;
286	PL_stack_max = c->stack_max;
287	PL_tmps_stack = c->tmps_stack;
288	PL_tmps_floor = c->tmps_floor;
289	PL_tmps_ix = c->tmps_ix;
290	PL_tmps_max = c->tmps_max;
291	PL_markstack = c->markstack;
292	PL_markstack_ptr = c->markstack_ptr;
293	PL_markstack_max = c->markstack_max;
294	PL_scopestack = c->scopestack;
295	PL_scopestack_ix = c->scopestack_ix;
296	PL_scopestack_max = c->scopestack_max;
297	PL_savestack = c->savestack;
298	PL_savestack_ix = c->savestack_ix;
299	PL_savestack_max = c->savestack_max;
300	#if PERL_VERSION < 9
301	PL_retstack = c->retstack;
302	PL_retstack_ix = c->retstack_ix;
303	PL_retstack_max = c->retstack_max;
304	#endif
305	PL_curpm = c->curpm;
306	PL_curcop = c->curcop;
307	PL_top_env = c->top_env;
308		293
309	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	294	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
310	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	295	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
311	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	296	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
312		297
…		…
315	CV *cv;	300	CV *cv;
316		301
317	/* now do the ugly restore mess */	302	/* now do the ugly restore mess */
318	while ((cv = (CV *)POPs))	303	while ((cv = (CV *)POPs))
319	{	304	{
320	AV *padlist = (AV *)POPs;
321
322	if (padlist)
323	{
324	put_padlist (aTHX_ cv); /* mark this padlist as available */	305	put_padlist (cv); /* mark this padlist as available */
325	CvPADLIST(cv) = padlist;	306	CvDEPTH (cv) = PTR2IV (POPs);
326	}	307	CvPADLIST (cv) = (AV *)POPs;
327
328	++CvDEPTH(cv);
329	}	308	}
330		309
331	PUTBACK;	310	PUTBACK;
332	}	311	}
333	}	312	}
334		313
335	static void	314	static void
336	save_state(pTHX_ Coro__State c, int flags)	315	save_state(Coro__State c, int flags)
337	{	316	{
338	{	317	{
339	dSP;	318	dSP;
340	I32 cxix = cxstack_ix;	319	I32 cxix = cxstack_ix;
341	PERL_CONTEXT *ccstk = cxstack;	320	PERL_CONTEXT *ccstk = cxstack;
…		…
355	PERL_CONTEXT *cx = &ccstk[cxix--];	334	PERL_CONTEXT *cx = &ccstk[cxix--];
356		335
357	if (CxTYPE(cx) == CXt_SUB)	336	if (CxTYPE(cx) == CXt_SUB)
358	{	337	{
359	CV *cv = cx->blk_sub.cv;	338	CV *cv = cx->blk_sub.cv;
		339
360	if (CvDEPTH(cv))	340	if (CvDEPTH (cv))
361	{	341	{
362	EXTEND (SP, CvDEPTH(cv)*2);	342	EXTEND (SP, 3);
363
364	while (--CvDEPTH(cv))
365	{
366	/* this tells the restore code to increment CvDEPTH */
367	PUSHs (Nullsv);
368	PUSHs ((SV *)cv);
369	}
370		343
371	PUSHs ((SV *)CvPADLIST(cv));	344	PUSHs ((SV *)CvPADLIST(cv));
		345	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
372	PUSHs ((SV *)cv);	346	PUSHs ((SV *)cv);
373		347
		348	CvDEPTH (cv) = 0;
374	get_padlist (aTHX_ cv);	349	get_padlist (cv);
375	}	350	}
376	}	351	}
377	#ifdef CXt_FORMAT	352	#ifdef CXt_FORMAT
378	else if (CxTYPE(cx) == CXt_FORMAT)	353	else if (CxTYPE(cx) == CXt_FORMAT)
379	{	354	{
…		…
397		372
398	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	373	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
399	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	374	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
400	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	375	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
401		376
402	c->dowarn = PL_dowarn;	377	#define VAR(name,type)c->name = PL_ ## name;
403	c->in_eval = PL_in_eval;	378	# include "state.h"
404		379	#undef VAR
405	c->curstackinfo = PL_curstackinfo;
406	c->curstack = PL_curstack;
407	c->mainstack = PL_mainstack;
408	c->stack_sp = PL_stack_sp;
409	c->op = PL_op;
410	c->curpad = PL_curpad;
411	c->comppad = PL_comppad;
412	c->compcv = PL_compcv;
413	c->stack_base = PL_stack_base;
414	c->stack_max = PL_stack_max;
415	c->tmps_stack = PL_tmps_stack;
416	c->tmps_floor = PL_tmps_floor;
417	c->tmps_ix = PL_tmps_ix;
418	c->tmps_max = PL_tmps_max;
419	c->markstack = PL_markstack;
420	c->markstack_ptr = PL_markstack_ptr;
421	c->markstack_max = PL_markstack_max;
422	c->scopestack = PL_scopestack;
423	c->scopestack_ix = PL_scopestack_ix;
424	c->scopestack_max = PL_scopestack_max;
425	c->savestack = PL_savestack;
426	c->savestack_ix = PL_savestack_ix;
427	c->savestack_max = PL_savestack_max;
428	#if PERL_VERSION < 9
429	c->retstack = PL_retstack;
430	c->retstack_ix = PL_retstack_ix;
431	c->retstack_max = PL_retstack_max;
432	#endif
433	c->curpm = PL_curpm;
434	c->curcop = PL_curcop;
435	c->top_env = PL_top_env;
436	}	380	}
437		381
438	/*	382	/*
439	* allocate various perl stacks. This is an exact copy	383	* allocate various perl stacks. This is an exact copy
440	* of perl.c:init_stacks, except that it uses less memory	384	* of perl.c:init_stacks, except that it uses less memory
441	* on the (sometimes correct) assumption that coroutines do	385	* on the (sometimes correct) assumption that coroutines do
442	* not usually need a lot of stackspace.	386	* not usually need a lot of stackspace.
443	*/	387	*/
444	static void	388	static void
445	coro_init_stacks (pTHX)	389	coro_init_stacks ()
446	{	390	{
447	LOCK;
448
449	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	391	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
450	PL_curstackinfo->si_type = PERLSI_MAIN;	392	PL_curstackinfo->si_type = PERLSI_MAIN;
451	PL_curstack = PL_curstackinfo->si_stack;	393	PL_curstack = PL_curstackinfo->si_stack;
452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	394	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453		395
…		…
474		416
475	New(54,PL_savestack,96,ANY);	417	New(54,PL_savestack,96,ANY);
476	PL_savestack_ix = 0;	418	PL_savestack_ix = 0;
477	PL_savestack_max = 96;	419	PL_savestack_max = 96;
478		420
479	#if PERL_VERSION < 9	421	#if !PERL_VERSION_ATLEAST (5,9,0)
480	New(54,PL_retstack,8,OP*);	422	New(54,PL_retstack,8,OP*);
481	PL_retstack_ix = 0;	423	PL_retstack_ix = 0;
482	PL_retstack_max = 8;	424	PL_retstack_max = 8;
483	#endif	425	#endif
484
485	UNLOCK;
486	}	426	}
487		427
488	/*	428	/*
489	* destroy the stacks, the callchain etc...	429	* destroy the stacks, the callchain etc...
490	*/	430	*/
491	static void	431	static void
492	destroy_stacks(pTHX)	432	coro_destroy_stacks ()
493	{	433	{
494	if (!IN_DESTRUCT)	434	if (!IN_DESTRUCT)
495	{	435	{
496	/* is this ugly, I ask? */	436	/* is this ugly, I ask? */
497	LEAVE_SCOPE (0);	437	LEAVE_SCOPE (0);
…		…
528		468
529	Safefree (PL_tmps_stack);	469	Safefree (PL_tmps_stack);
530	Safefree (PL_markstack);	470	Safefree (PL_markstack);
531	Safefree (PL_scopestack);	471	Safefree (PL_scopestack);
532	Safefree (PL_savestack);	472	Safefree (PL_savestack);
533	#if PERL_VERSION < 9	473	#if !PERL_VERSION_ATLEAST (5,9,0)
534	Safefree (PL_retstack);	474	Safefree (PL_retstack);
535	#endif	475	#endif
536	}	476	}
537		477
538	static void	478	static void
539	allocate_stack (Coro__State ctx, int alloc)	479	setup_coro (struct coro *coro)
540	{
541	coro_stack *stack;
542
543	New (0, stack, 1, coro_stack);
544
545	stack->refcnt = 1;
546	stack->usecnt = 1;
547	stack->gencnt = ctx->gencnt = 0;
548
549	if (alloc)
550	{
551	#if HAVE_MMAP
552	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
553	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
554	if (stack->sptr != (void *)-1)
555	{
556	# if STACKGUARD
557	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
558	# endif
559	}
560	else
561	#endif
562	{
563	stack->ssize = - (STACKSIZE * (long)sizeof (long));
564	New (0, stack->sptr, STACKSIZE, long);
565	}
566	}
567	else
568	stack->sptr = 0;
569
570	ctx->stack = stack;
571	}
572
573	static void
574	deallocate_stack (Coro__State ctx)
575	{
576	coro_stack *stack = ctx->stack;
577
578	ctx->stack = 0;
579
580	if (stack)
581	{
582	if (!--stack->refcnt)
583	{
584	#ifdef HAVE_MMAP
585	if (stack->ssize > 0 && stack->sptr)
586	munmap (stack->sptr, stack->ssize);
587	else
588	#endif
589	Safefree (stack->sptr);
590
591	Safefree (stack);
592	}
593	else if (ctx->gencnt == stack->gencnt)
594	--stack->usecnt;
595	}
596	}
597
598	static void
599	setup_coro (void *arg)
600	{	480	{
601	/*	481	/*
602	* emulate part of the perl startup here.	482	* emulate part of the perl startup here.
603	*/	483	*/
604	dTHX;
605	dSP;
606	Coro__State ctx = (Coro__State)arg;
607	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
608		484
609	coro_init_stacks (aTHX);	485	coro_init_stacks ();
		486
610	/*PL_curcop = 0;*/	487	PL_curcop = 0;
611	/*PL_in_eval = PL_in_eval;*/ /* inherit */	488	PL_in_eval = 0;
		489	PL_curpm = 0;
		490
		491	{
		492	dSP;
		493	LOGOP myop;
		494
		495	/* I have no idea why this is needed, but it is */
		496	PUSHMARK (SP);
		497
612	SvREFCNT_dec (GvAV (PL_defgv));	498	SvREFCNT_dec (GvAV (PL_defgv));
613	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	499	GvAV (PL_defgv) = coro->args; coro->args = 0;
614		500
615	SPAGAIN;
616
617	if (ctx->stack)
618	{
619	ctx->cursp = 0;
620
621	PUSHMARK(SP);
622	PUTBACK;
623	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
624
625	if (SvTRUE (ERRSV))
626	croak (NULL);
627	else
628	croak ("FATAL: CCTXT coroutine returned!");
629	}
630	else
631	{
632	UNOP myop;
633
634	PL_op = (OP *)&myop;
635
636	Zero(&myop, 1, UNOP);	501	Zero (&myop, 1, LOGOP);
637	myop.op_next = Nullop;	502	myop.op_next = Nullop;
638	myop.op_flags = OPf_WANT_VOID;	503	myop.op_flags = OPf_WANT_VOID;
639		504
		505	PL_op = (OP *)&myop;
		506
640	PUSHMARK(SP);	507	PUSHMARK (SP);
641	XPUSHs (sub_init);	508	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
642	/*
643	* the next line is slightly wrong, as PL_op->op_next
644	* is actually being executed so we skip the first op.
645	* that doesn't matter, though, since it is only
646	* pp_nextstate and we never return...
647	* ah yes, and I don't care anyways ;)
648	*/
649	PUTBACK;	509	PUTBACK;
650	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	510	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
651	SPAGAIN;	511	SPAGAIN;
652		512
653	ENTER; /* necessary e.g. for dounwind */	513	ENTER; /* necessary e.g. for dounwind */
654	}	514	}
655	}	515	}
656		516
657	static void	517	static void
658	continue_coro (void *arg)	518	free_coro_mortal ()
659	{	519	{
660	/*
661	* this is a _very_ stripped down perl interpreter ;)
662	*/
663	dTHX;
664	Coro__State ctx = (Coro__State)arg;
665
666	PL_top_env = &ctx->start_env;
667
668	ctx->cursp = 0;
669	PL_op = PL_op->op_next;
670	CALLRUNOPS(aTHX);
671
672	abort ();
673	}
674
675	static void
676	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
677	{
678	dSTACKLEVEL;
679
680	if (prev != next)
681	{
682	if (next->mainstack)
683	{
684	LOCK;
685	SAVE (prev, flags);
686	LOAD (next);
687	UNLOCK;
688
689	/* mark this state as in-use */
690	next->mainstack = 0;
691	next->tmps_ix = -2;
692
693	/* stacklevel changed? if yes, grab the stack for us! */
694	if (flags & TRANSFER_SAVE_CCTXT)
695	{
696	if (!prev->stack)
697	allocate_stack (prev, 0);
698	else if (prev->cursp != stacklevel
699	&& prev->stack->usecnt > 1)
700	{
701	prev->gencnt = ++prev->stack->gencnt;
702	prev->stack->usecnt = 1;
703	}
704
705	/* has our stack been invalidated? */
706	if (next->stack && next->stack->gencnt != next->gencnt)
707	{
708	deallocate_stack (next);
709	allocate_stack (next, 1);
710	coro_create (&(next->stack->cctx),
711	continue_coro, (void *)next,
712	next->stack->sptr, labs (next->stack->ssize));
713	}
714
715	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716	prev->cursp = stacklevel;
717	/* don't add any code here */
718	}
719	else
720	next->cursp = stacklevel;
721	}
722	else if (next->tmps_ix == -2)
723	croak ("tried to transfer to running coroutine");
724	else
725	{
726	LOCK;
727	SAVE (prev, -1); /* first get rid of the old state */
728	UNLOCK;
729
730	if (flags & TRANSFER_SAVE_CCTXT)
731	{
732	if (!prev->stack)
733	allocate_stack (prev, 0);
734
735	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
736	{
737	PL_top_env = &next->start_env;
738
739	setup_coro (next);
740	next->cursp = stacklevel;
741
742	prev->stack->refcnt++;
743	prev->stack->usecnt++;
744	next->stack = prev->stack;
745	next->gencnt = prev->gencnt;
746	}
747	else
748	{
749	assert (!next->stack);
750	allocate_stack (next, 1);
751	coro_create (&(next->stack->cctx),
752	setup_coro, (void *)next,
753	next->stack->sptr, labs (next->stack->ssize));
754	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755	prev->cursp = stacklevel;
756	/* don't add any code here */
757	}
758	}
759	else
760	{
761	setup_coro (next);
762	next->cursp = stacklevel;
763	}
764	}
765	}
766
767	LOCK;
768	if (coro_mortal)	520	if (coro_mortal)
769	{	521	{
770	SvREFCNT_dec (coro_mortal);	522	SvREFCNT_dec (coro_mortal);
771	coro_mortal = 0;	523	coro_mortal = 0;
772	}	524	}
		525	}
		526
		527	static void NOINLINE
		528	prepare_cctx (coro_cctx *cctx)
		529	{
		530	dSP;
		531	LOGOP myop;
		532
		533	Zero (&myop, 1, LOGOP);
		534	myop.op_next = PL_op;
		535	myop.op_flags = OPf_WANT_VOID;
		536
		537	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		538
		539	PUSHMARK (SP);
		540	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		541	PUTBACK;
		542	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		543	SPAGAIN;
		544	}
		545
		546	static void
		547	coro_run (void *arg)
		548	{
		549	/* coro_run is the alternative epilogue of transfer() */
773	UNLOCK;	550	UNLOCK;
774	}
775		551
776	#define SV_CORO(sv,func) \	552	/*
777	do { \	553	* this is a _very_ stripped down perl interpreter ;)
778	if (SvROK (sv)) \	554	*/
779	sv = SvRV (sv); \	555	PL_top_env = &PL_start_env;
780	\
781	if (SvTYPE (sv) == SVt_PVHV) \
782	{ \
783	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
784	\
785	if (!he) \
786	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787	\
788	(sv) = SvRV (HeVAL(he)); \
789	} \
790	\
791	/* must also be changed inside Coro::Cont::yield */ \
792	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
793	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794	\
795	} while(0)
796		556
797	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	557	/* inject call to cctx_init */
		558	prepare_cctx ((coro_cctx *)arg);
798		559
		560	/* somebody will hit me for both perl_run and PL_restartop */
		561	perl_run (PL_curinterp);
		562
		563	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		564	abort ();
		565	}
		566
		567	static coro_cctx *
		568	cctx_new ()
		569	{
		570	coro_cctx *cctx;
		571
		572	++cctx_count;
		573
		574	New (0, cctx, 1, coro_cctx);
		575
		576	#if HAVE_MMAP
		577
		578	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		579	/* mmap suppsedly does allocate-on-write for us */
		580	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		581
		582	if (cctx->sptr == (void *)-1)
		583	{
		584	perror ("FATAL: unable to mmap stack for coroutine");
		585	_exit (EXIT_FAILURE);
		586	}
		587
		588	# if STACKGUARD
		589	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		590	# endif
		591
		592	#else
		593
		594	cctx->ssize = STACKSIZE * (long)sizeof (long);
		595	New (0, cctx->sptr, STACKSIZE, long);
		596
		597	if (!cctx->sptr)
		598	{
		599	perror ("FATAL: unable to malloc stack for coroutine");
		600	_exit (EXIT_FAILURE);
		601	}
		602
		603	#endif
		604
		605	#if USE_VALGRIND
		606	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		607	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		608	cctx->ssize + (char *)cctx->sptr
		609	);
		610	#endif
		611
		612	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		613
		614	return cctx;
		615	}
		616
		617	static void
		618	cctx_free (coro_cctx *cctx)
		619	{
		620	if (!cctx)
		621	return;
		622
		623	--cctx_count;
		624
		625	#if USE_VALGRIND
		626	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		627	#endif
		628
		629	#if HAVE_MMAP
		630	munmap (cctx->sptr, cctx->ssize);
		631	#else
		632	Safefree (cctx->sptr);
		633	#endif
		634
		635	Safefree (cctx);
		636	}
		637
		638	static coro_cctx *
		639	cctx_get ()
		640	{
		641	coro_cctx *cctx;
		642
		643	if (cctx_first)
		644	{
		645	--cctx_idle;
		646	cctx = cctx_first;
		647	cctx_first = cctx->next;
		648	}
		649	else
		650	{
		651	cctx = cctx_new ();
		652	PL_op = PL_op->op_next;
		653	}
		654
		655	return cctx;
		656	}
		657
		658	static void
		659	cctx_put (coro_cctx *cctx)
		660	{
		661	++cctx_idle;
		662	cctx->next = cctx_first;
		663	cctx_first = cctx;
		664	}
		665
		666	/* never call directly, always through the coro_state_transfer global variable */
		667	static void NOINLINE
		668	transfer (struct coro *prev, struct coro *next, int flags)
		669	{
		670	dSTACKLEVEL;
		671
		672	/* sometimes transfer is only called to set idle_sp */
		673	if (flags == TRANSFER_SET_STACKLEVEL)
		674	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		675	else if (prev != next)
		676	{
		677	coro_cctx *prev__cctx;
		678
		679	if (!prev->cctx)
		680	{
		681	/* create a new empty context */
		682	Newz (0, prev->cctx, 1, coro_cctx);
		683	prev->cctx->inuse = 1;
		684	prev->flags |= CF_RUNNING;
		685	}
		686
		687	assert ( prev->flags & CF_RUNNING);
		688	assert (!next->flags & CF_RUNNING);
		689
		690	prev->flags &= ~CF_RUNNING;
		691	next->flags |= CF_RUNNING;
		692
		693	LOCK;
		694
		695	if (next->mainstack)
		696	{
		697	/* coroutine already started */
		698	SAVE (prev, flags);
		699	LOAD (next);
		700	}
		701	else
		702	{
		703	/* need to start coroutine */
		704	/* first get rid of the old state */
		705	SAVE (prev, -1);
		706	/* setup coroutine call */
		707	setup_coro (next);
		708	/* need a stack */
		709	assert (!next->stack);
		710	next->cctx = 0;
		711	}
		712
		713	prev__cctx = prev->cctx;
		714
		715	/* possibly "free" the cctx */
		716	if (prev__cctx->idle_sp == STACKLEVEL)
		717	{
		718	assert (PL_top_env == prev__cctx->top_env);//D
		719	cctx_put (prev__cctx);
		720	prev->cctx = 0;
		721	}
		722
		723	if (!next->cctx)
		724	next->cctx = cctx_get ();
		725
		726	if (prev__cctx != next->cctx)
		727	{
		728	assert ( prev__cctx->inuse);
		729	assert (!next->cctx->inuse);
		730
		731	prev__cctx->inuse = 0;
		732	next->cctx->inuse = 1;
		733
		734	prev__cctx->top_env = PL_top_env;
		735	PL_top_env = next->cctx->top_env;
		736	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		737	}
		738
		739	free_coro_mortal ();
		740
		741	UNLOCK;
		742	}
		743	}
		744
		745	struct transfer_args
		746	{
		747	struct coro *prev, *next;
		748	int flags;
		749	};
		750
		751	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		752
		753	static void
		754	coro_state_destroy (struct coro *coro)
		755	{
		756	if (coro->refcnt--)
		757	return;
		758
		759	if (coro->mainstack && coro->mainstack != main_mainstack)
		760	{
		761	struct coro temp;
		762
		763	SAVE ((&temp), TRANSFER_SAVE_ALL);
		764	LOAD (coro);
		765
		766	coro_destroy_stacks ();
		767
		768	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		769
		770	coro->mainstack = 0;
		771	}
		772
		773	cctx_free (coro->cctx);
		774	SvREFCNT_dec (coro->args);
		775	Safefree (coro);
		776	}
		777
799	static void	778	static int
		779	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		780	{
		781	struct coro *coro = (struct coro *)mg->mg_ptr;
		782	mg->mg_ptr = 0;
		783
		784	coro_state_destroy (coro);
		785
		786	return 0;
		787	}
		788
		789	static int
		790	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		791	{
		792	struct coro *coro = (struct coro *)mg->mg_ptr;
		793
		794	++coro->refcnt;
		795
		796	return 0;
		797	}
		798
		799	static MGVTBL coro_state_vtbl = {
		800	0, 0, 0, 0,
		801	coro_state_clear,
		802	0,
		803	#ifdef MGf_DUP
		804	coro_state_dup,
		805	#else
		806	# define MGf_DUP 0
		807	#endif
		808	};
		809
		810	static struct coro *
		811	SvSTATE (SV *coro)
		812	{
		813	HV *stash;
		814	MAGIC *mg;
		815
		816	if (SvROK (coro))
		817	coro = SvRV (coro);
		818
		819	stash = SvSTASH (coro);
		820	if (stash != coro_stash && stash != coro_state_stash)
		821	{
		822	/* very slow, but rare, check */
		823	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		824	croak ("Coro::State object required");
		825	}
		826
		827	mg = SvMAGIC (coro);
		828	assert (mg->mg_type == PERL_MAGIC_ext);
		829	return (struct coro *)mg->mg_ptr;
		830	}
		831
		832	static void
		833	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		834	{
		835	ta->prev = SvSTATE (prev);
		836	ta->next = SvSTATE (next);
		837	ta->flags = flags;
		838	}
		839
		840	static void
800	api_transfer(pTHX_ SV *prev, SV *next, int flags)	841	api_transfer (SV *prev, SV *next, int flags)
801	{	842	{
802	SV_CORO (prev, "Coro::transfer");	843	dTHX;
803	SV_CORO (next, "Coro::transfer");	844	struct transfer_args ta;
804		845
805	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	846	prepare_transfer (&ta, prev, next, flags);
		847	TRANSFER (ta);
806	}	848	}
807		849
808	/** Coro ********************************************************************/	850	/** Coro ********************************************************************/
809		851
810	#define PRIO_MAX 3	852	#define PRIO_MAX 3
…		…
814	#define PRIO_IDLE -3	856	#define PRIO_IDLE -3
815	#define PRIO_MIN -4	857	#define PRIO_MIN -4
816		858
817	/* for Coro.pm */	859	/* for Coro.pm */
818	static GV *coro_current, *coro_idle;	860	static GV *coro_current, *coro_idle;
819	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	861	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
820	static int coro_nready;	862	static int coro_nready;
821		863
822	static void	864	static void
823	coro_enq (pTHX_ SV *sv)	865	coro_enq (SV *sv)
824	{	866	{
825	SV **xprio;
826	int prio;	867	int prio;
827		868
828	if (SvTYPE (sv) != SVt_PVHV)	869	if (SvTYPE (sv) != SVt_PVHV)
829	croak ("Coro::ready tried to enqueue something that is not a coroutine");	870	croak ("Coro::ready tried to enqueue something that is not a coroutine");
830		871
831	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);	872	prio = SvSTATE (sv)->prio;
832	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
833
834	prio = prio > PRIO_MAX ? PRIO_MAX
835	: prio < PRIO_MIN ? PRIO_MIN
836	: prio;
837		873
838	av_push (coro_ready [prio - PRIO_MIN], sv);	874	av_push (coro_ready [prio - PRIO_MIN], sv);
839	coro_nready++;	875	coro_nready++;
840	}	876	}
841		877
842	static SV *	878	static SV *
843	coro_deq (pTHX_ int min_prio)	879	coro_deq (int min_prio)
844	{	880	{
845	int prio = PRIO_MAX - PRIO_MIN;	881	int prio = PRIO_MAX - PRIO_MIN;
846		882
847	min_prio -= PRIO_MIN;	883	min_prio -= PRIO_MIN;
848	if (min_prio < 0)	884	if (min_prio < 0)
849	min_prio = 0;	885	min_prio = 0;
850		886
851	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852	if (av_len (coro_ready[prio]) >= 0)	888	if (AvFILLp (coro_ready [prio]) >= 0)
853	{	889	{
854	coro_nready--;	890	coro_nready--;
855	return av_shift (coro_ready[prio]);	891	return av_shift (coro_ready [prio]);
856	}	892	}
857		893
858	return 0;	894	return 0;
859	}	895	}
860		896
861	static void	897	static int
862	api_ready (SV *coro)	898	api_ready (SV *coro_sv)
		899	{
		900	struct coro *coro;
		901
		902	if (SvROK (coro_sv))
		903	coro_sv = SvRV (coro_sv);
		904
		905	coro = SvSTATE (coro_sv);
		906	if (coro->flags & CF_READY)
		907	return 0;
		908
		909	coro->flags |= CF_READY;
		910
		911	LOCK;
		912	coro_enq (SvREFCNT_inc (coro_sv));
		913	UNLOCK;
		914
		915	return 1;
		916	}
		917
		918	static int
		919	api_is_ready (SV *coro_sv)
		920	{
		921	struct coro *coro;
		922
		923	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		924	}
		925
		926	static void
		927	prepare_schedule (struct transfer_args *ta)
		928	{
		929	SV *current, *prev, *next;
		930
		931	current = GvSV (coro_current);
		932
		933	for (;;)
		934	{
		935	LOCK;
		936	next = coro_deq (PRIO_MIN);
		937	UNLOCK;
		938
		939	if (next)
		940	break;
		941
		942	{
		943	dSP;
		944
		945	ENTER;
		946	SAVETMPS;
		947
		948	PUSHMARK (SP);
		949	PUTBACK;
		950	call_sv (GvSV (coro_idle), G_DISCARD);
		951
		952	FREETMPS;
		953	LEAVE;
		954	}
		955	}
		956
		957	prev = SvRV (current);
		958	SvRV (current) = next;
		959
		960	/* free this only after the transfer */
		961	LOCK;
		962	free_coro_mortal ();
		963	UNLOCK;
		964	coro_mortal = prev;
		965
		966	ta->prev = SvSTATE (prev);
		967	ta->next = SvSTATE (next);
		968	ta->flags = TRANSFER_SAVE_ALL;
		969
		970	ta->next->flags &= ~CF_READY;
		971	}
		972
		973	static void
		974	prepare_cede (struct transfer_args *ta)
		975	{
		976	api_ready (GvSV (coro_current));
		977
		978	prepare_schedule (ta);
		979	}
		980
		981	static void
		982	api_schedule (void)
863	{	983	{
864	dTHX;	984	dTHX;
		985	struct transfer_args ta;
865		986
866	if (SvROK (coro))	987	prepare_schedule (&ta);
867	coro = SvRV (coro);	988	TRANSFER (ta);
868
869	LOCK;
870	coro_enq (aTHX_ SvREFCNT_inc (coro));
871	UNLOCK;
872	}	989	}
873		990
874	static void	991	static void
875	api_schedule (void)	992	api_cede (void)
876	{	993	{
877	dTHX;	994	dTHX;
		995	struct transfer_args ta;
878		996
879	SV *prev, *next;	997	prepare_cede (&ta);
880		998	TRANSFER (ta);
881	LOCK;
882
883	prev = SvRV (GvSV (coro_current));
884	next = coro_deq (aTHX_ PRIO_MIN);
885
886	if (!next)
887	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
888
889	/* free this only after the transfer */
890	coro_mortal = prev;
891	SV_CORO (prev, "Coro::schedule");
892
893	SvRV (GvSV (coro_current)) = next;
894
895	SV_CORO (next, "Coro::schedule");
896
897	UNLOCK;
898
899	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
900	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
901	}
902
903	static void
904	api_cede (void)
905	{
906	dTHX;
907
908	LOCK;
909	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
910	UNLOCK;
911
912	api_schedule ();
913	}	999	}
914		1000
915	MODULE = Coro::State PACKAGE = Coro::State	1001	MODULE = Coro::State PACKAGE = Coro::State
916		1002
917	PROTOTYPES: ENABLE	1003	PROTOTYPES: DISABLE
918		1004
919	BOOT:	1005	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1006	{
921	#ifdef USE_ITHREADS	1007	#ifdef USE_ITHREADS
922	MUTEX_INIT (&coro_mutex);	1008	MUTEX_INIT (&coro_mutex);
923	#endif	1009	#endif
924	BOOT_PAGESIZE;	1010	BOOT_PAGESIZE;
925		1011
926	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
927	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
928	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1012	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929		1013
930	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1014	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
931	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1015	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
932	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1016	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
933	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
934		1017
935	main_mainstack = PL_mainstack;	1018	main_mainstack = PL_mainstack;
936		1019
937	coroapi.ver = CORO_API_VERSION;	1020	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1021	coroapi.transfer = api_transfer;
939	}
940		1022
941	Coro::State	1023	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1024	}
943	SV * args	1025
944	PROTOTYPE: $	1026	SV *
		1027	new (char *klass, ...)
945	CODE:	1028	CODE:
946	Coro__State coro;	1029	{
		1030	struct coro *coro;
		1031	HV *hv;
		1032	int i;
947		1033
948	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
949	croak ("Coro::State::_newprocess expects an arrayref");
950
951	Newz (0, coro, 1, struct coro);	1034	Newz (0, coro, 1, struct coro);
		1035	coro->args = newAV ();
952		1036
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1037	hv = newHV ();
954	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1038	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
955	/*coro->stack = 0;*/	1039	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
956		1040
957	/* same as JMPENV_BOOTSTRAP */	1041	for (i = 1; i < items; i++)
958	/* we might be able to recycle start_env, but safe is safe */	1042	av_push (coro->args, newSVsv (ST (i)));
959	/*Zero(&coro->start_env, 1, JMPENV);*/	1043	}
960	coro->start_env.je_ret = -1;
961	coro->start_env.je_mustcatch = TRUE;
962
963	RETVAL = coro;
964	OUTPUT:	1044	OUTPUT:
965	RETVAL	1045	RETVAL
966		1046
967	void	1047	void
968	transfer(prev, next, flags)	1048	_set_stacklevel (...)
969	SV *prev	1049	ALIAS:
970	SV *next	1050	Coro::State::transfer = 1
971	int flags	1051	Coro::schedule = 2
972	PROTOTYPE: @	1052	Coro::cede = 3
		1053	Coro::Cont::yield = 4
973	CODE:	1054	CODE:
974	PUTBACK;	1055	{
975	SV_CORO (next, "Coro::transfer");	1056	struct transfer_args ta;
976	SV_CORO (prev, "Coro::transfer");	1057
977	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1058	switch (ix)
978	SPAGAIN;	1059	{
		1060	case 0:
		1061	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1062	ta.next = 0;
		1063	ta.flags = TRANSFER_SET_STACKLEVEL;
		1064	break;
		1065
		1066	case 1:
		1067	if (items != 3)
		1068	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1069
		1070	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1071	break;
		1072
		1073	case 2:
		1074	prepare_schedule (&ta);
		1075	break;
		1076
		1077	case 3:
		1078	prepare_cede (&ta);
		1079	break;
		1080
		1081	case 4:
		1082	{
		1083	SV *yieldstack;
		1084	SV *sv;
		1085	AV *defav = GvAV (PL_defgv);
		1086
		1087	yieldstack = *hv_fetch (
		1088	(HV *)SvRV (GvSV (coro_current)),
		1089	"yieldstack", sizeof ("yieldstack") - 1,
		1090	0
		1091	);
		1092
		1093	/* set up @_ -- ugly */
		1094	av_clear (defav);
		1095	av_fill (defav, items - 1);
		1096	while (items--)
		1097	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1098
		1099	sv = av_pop ((AV *)SvRV (yieldstack));
		1100	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1101	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1102	ta.flags = 0;
		1103	SvREFCNT_dec (sv);
		1104	}
		1105	break;
		1106
		1107	}
		1108
		1109	TRANSFER (ta);
		1110	}
979		1111
980	void	1112	void
981	DESTROY(coro)	1113	_clone_state_from (SV *dst, SV *src)
982	Coro::State coro	1114	CODE:
983	CODE:	1115	{
		1116	struct coro *coro_src = SvSTATE (src);
984		1117
985	if (coro->mainstack && coro->mainstack != main_mainstack)	1118	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
986	{
987	struct coro temp;
988		1119
989	PUTBACK;	1120	++coro_src->refcnt;
990	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1121	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
991	LOAD (aTHX_ coro);	1122	}
992	SPAGAIN;
993
994	destroy_stacks (aTHX);
995
996	LOAD ((&temp)); /* this will get rid of defsv etc.. */
997	SPAGAIN;
998
999	coro->mainstack = 0;
1000	}
1001
1002	deallocate_stack (coro);
1003	SvREFCNT_dec (coro->args);
1004	Safefree (coro);
1005		1123
1006	void	1124	void
1007	_exit(code)	1125	_exit (code)
1008	int code	1126	int code
1009	PROTOTYPE: $	1127	PROTOTYPE: $
1010	CODE:	1128	CODE:
1011	_exit (code);	1129	_exit (code);
1012		1130
1013	MODULE = Coro::State PACKAGE = Coro::Cont	1131	int
		1132	cctx_count ()
		1133	CODE:
		1134	RETVAL = cctx_count;
		1135	OUTPUT:
		1136	RETVAL
1014		1137
1015	# this is slightly dirty (should expose a c-level api)	1138	int
1016		1139	cctx_idle ()
1017	void	1140	CODE:
1018	yield(...)	1141	RETVAL = cctx_idle;
1019	PROTOTYPE: @	1142	OUTPUT:
1020	CODE:	1143	RETVAL
1021	SV *yieldstack;
1022	SV *sv;
1023	AV *defav = GvAV (PL_defgv);
1024	struct coro *prev, *next;
1025
1026	yieldstack = *hv_fetch (
1027	(HV *)SvRV (GvSV (coro_current)),
1028	"yieldstack", sizeof ("yieldstack") - 1,
1029	0
1030	);
1031
1032	/* set up @_ -- ugly */
1033	av_clear (defav);
1034	av_fill (defav, items - 1);
1035	while (items--)
1036	av_store (defav, items, SvREFCNT_inc (ST(items)));
1037
1038	sv = av_pop ((AV *)SvRV (yieldstack));
1039	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1040	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1041	SvREFCNT_dec (sv);
1042
1043	transfer (aTHX_ prev, next, 0);
1044		1144
1045	MODULE = Coro::State PACKAGE = Coro	1145	MODULE = Coro::State PACKAGE = Coro
1046		1146
1047	# this is slightly dirty (should expose a c-level api)
1048
1049	BOOT:	1147	BOOT:
1050	{	1148	{
1051	int i;	1149	int i;
		1150
1052	HV *stash = gv_stashpv ("Coro", TRUE);	1151	coro_stash = gv_stashpv ("Coro", TRUE);
1053		1152
1054	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1153	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1055	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1154	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1056	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1155	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1057	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1156	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1058	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1157	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1059	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1158	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1060		1159
1061	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1160	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1062	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1161	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1063		1162
1064	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1163	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1068	SV *sv = perl_get_sv("Coro::API", 1);	1167	SV *sv = perl_get_sv("Coro::API", 1);
1069		1168
1070	coroapi.schedule = api_schedule;	1169	coroapi.schedule = api_schedule;
1071	coroapi.cede = api_cede;	1170	coroapi.cede = api_cede;
1072	coroapi.ready = api_ready;	1171	coroapi.ready = api_ready;
		1172	coroapi.is_ready = api_is_ready;
1073	coroapi.nready = &coro_nready;	1173	coroapi.nready = &coro_nready;
1074	coroapi.current = coro_current;	1174	coroapi.current = coro_current;
1075		1175
1076	GCoroAPI = &coroapi;	1176	GCoroAPI = &coroapi;
1077	sv_setiv(sv, (IV)&coroapi);	1177	sv_setiv (sv, (IV)&coroapi);
1078	SvREADONLY_on(sv);	1178	SvREADONLY_on (sv);
1079	}	1179	}
1080	}	1180	}
1081		1181
1082	#if !PERL_MICRO	1182	int
		1183	prio (Coro::State coro, int newprio = 0)
		1184	ALIAS:
		1185	nice = 1
		1186	CODE:
		1187	{
		1188	RETVAL = coro->prio;
1083		1189
1084	void	1190	if (items > 1)
		1191	{
		1192	if (ix)
		1193	newprio += coro->prio;
		1194
		1195	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1196	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1197
		1198	coro->prio = newprio;
		1199	}
		1200	}
		1201
		1202	SV *
1085	ready(self)	1203	ready (SV *self)
1086	SV * self
1087	PROTOTYPE: $	1204	PROTOTYPE: $
1088	CODE:	1205	CODE:
1089	api_ready (self);	1206	RETVAL = boolSV (api_ready (self));
		1207	OUTPUT:
		1208	RETVAL
1090		1209
1091	#endif	1210	SV *
		1211	is_ready (SV *self)
		1212	PROTOTYPE: $
		1213	CODE:
		1214	RETVAL = boolSV (api_is_ready (self));
		1215	OUTPUT:
		1216	RETVAL
1092		1217
1093	int	1218	int
1094	nready(...)	1219	nready (...)
1095	PROTOTYPE:	1220	PROTOTYPE:
1096	CODE:	1221	CODE:
1097	RETVAL = coro_nready;	1222	RETVAL = coro_nready;
1098	OUTPUT:	1223	OUTPUT:
1099	RETVAL	1224	RETVAL
1100		1225
1101	void	1226	MODULE = Coro::State PACKAGE = Coro::AIO
1102	schedule(...)
1103	PROTOTYPE:
1104	CODE:
1105	api_schedule ();
1106		1227
1107	void
1108	cede(...)
1109	PROTOTYPE:
1110	CODE:
1111	api_cede ();
1112
1113	# and these are hacks
1114	SV *	1228	SV *
1115	_aio_get_state ()	1229	_get_state ()
1116	CODE:	1230	CODE:
1117	{	1231	{
1118	struct {	1232	struct {
1119	int errorno;	1233	int errorno;
1120	int laststype;	1234	int laststype;
…		…
1131	}	1245	}
1132	OUTPUT:	1246	OUTPUT:
1133	RETVAL	1247	RETVAL
1134		1248
1135	void	1249	void
1136	_aio_set_state (char *data_)	1250	_set_state (char *data_)
1137	PROTOTYPE: $	1251	PROTOTYPE: $
1138	CODE:	1252	CODE:
1139	{	1253	{
1140	struct {	1254	struct {
1141	int errorno;	1255	int errorno;

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