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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.84 by root, Fri Nov 24 00:31:21 2006 UTC vs.
Revision 1.117 by root, Fri Dec 1 19:41:06 2006 UTC

1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	#if PERL_VERSION < 6	9	#if USE_VALGRIND
		10	# include <valgrind/valgrind.h>
		11	#endif
		12
		13	/* the maximum number of idle cctx that will be pooled */
		14	#define MAX_IDLE_CCTX 8
		15
		16	#define PERL_VERSION_ATLEAST(a,b,c) \
		17	(PERL_REVISION > (a) \
		18	|| (PERL_REVISION == (a) \
		19	&& (PERL_VERSION > (b) \
		20	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		21
		22	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	23	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	24	# define PL_ppaddr ppaddr
14	# endif	25	# endif
15	# ifndef call_sv	26	# ifndef call_sv
16	# define call_sv perl_call_sv	27	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	38	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	39	# define IS_PADCONST(v) 0
29	# endif	40	# endif
30	#endif	41	#endif
31		42
		43	#include <stdio.h>
32	#include <errno.h>	44	#include <errno.h>
33		45
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	46	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	47	# undef STACKGUARD
36	#endif	48	#endif
…		…
53	# ifndef PAGESIZE	65	# ifndef PAGESIZE
54	# define PAGESIZE pagesize	66	# define PAGESIZE pagesize
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)	67	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;	68	static long pagesize;
57	# else	69	# else
58	# define BOOT_PAGESIZE	70	# define BOOT_PAGESIZE (void)0
59	# endif	71	# endif
		72	#else
		73	# define PAGESIZE 0
		74	# define BOOT_PAGESIZE (void)0
60	#endif	75	#endif
61
62	#define SUB_INIT "Coro::State::initialize"
63	#define UCORO_STATE "_coro_state"
64		76
65	/* The next macro should declare a variable stacklevel that contains and approximation	77	/* The next macro should declare a variable stacklevel that contains and approximation
66	* to the current C stack pointer. Its property is that it changes with each call	78	* to the current C stack pointer. Its property is that it changes with each call
67	* and should be unique. */	79	* and should be unique. */
		80	#define dSTACKLEVEL int stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	81	#define STACKLEVEL ((void *)&stacklevel)
69		82
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	83	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		84
72	#define labs(l) ((l) >= 0 ? (l) : -(l))	85	#if __GNUC__ >= 3
		86	# define attribute(x) __attribute__(x)
		87	#else
		88	# define attribute(x)
		89	#endif
		90
		91	#define NOINLINE attribute ((noinline))
73		92
74	#include "CoroAPI.h"	93	#include "CoroAPI.h"
		94
		95	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
75		96
76	#ifdef USE_ITHREADS	97	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	98	static perl_mutex coro_mutex;
78	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	99	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	100	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
82	# define UNLOCK (void)0	103	# define UNLOCK (void)0
83	#endif	104	#endif
84		105
85	static struct CoroAPI coroapi;	106	static struct CoroAPI coroapi;
86	static AV *main_mainstack; /* used to differentiate between $main and others */	107	static AV *main_mainstack; /* used to differentiate between $main and others */
87	static HV *coro_state_stash;	108	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 */	109	static SV *coro_mortal; /* will be freed after next transfer */
91		110
92	/* this is actually not only the c stack but also c registers etc... */	111	static struct coro_cctx *cctx_first;
		112	static int cctx_count, cctx_idle;
		113
		114	/* this is a structure representing a c-level coroutine */
93	typedef struct {	115	typedef struct coro_cctx {
94	int refcnt; /* pointer reference counter */	116	struct coro_cctx *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		117
98	coro_context cctx;	118	/* the stack */
99
100	void *sptr;	119	void *sptr;
101	long ssize; /* positive == mmap, otherwise malloc */	120	long ssize; /* positive == mmap, otherwise malloc */
102	} coro_stack;
103		121
		122	/* cpu state */
		123	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		124	JMPENV *top_env;
		125	coro_context cctx;
		126
		127	int inuse;
		128
		129	#if USE_VALGRIND
		130	int valgrind_id;
		131	#endif
		132	} coro_cctx;
		133
		134	enum {
		135	CF_RUNNING = 0x0001, /* coroutine is running */
		136	CF_READY = 0x0002, /* coroutine is ready */
		137	CF_NEW = 0x0004, /* ahs never been switched to */
		138	};
		139
		140	/* this is a structure representing a perl-level coroutine */
104	struct coro {	141	struct coro {
105	/* the optional C context */	142	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	143	coro_cctx *cctx;
107	void *cursp;	144
		145	/* data associated with this coroutine (initial args) */
		146	AV *args;
108	int gencnt;	147	int refcnt;
		148	int flags;
109		149
110	/* optionally saved, might be zero */	150	/* optionally saved, might be zero */
111	AV *defav;	151	AV *defav;
112	SV *defsv;	152	SV *defsv;
113	SV *errsv;	153	SV *errsv;
114		154
115	/* saved global state not related to stacks */	155	#define VAR(name,type) type name;
116	U8 dowarn;	156	# include "state.h"
117	I32 in_eval;	157	#undef VAR
118		158
119	/* the stacks and related info (callchain etc..) */	159	/* coro process data */
120	PERL_SI *curstackinfo;	160	int prio;
121	AV *curstack;
122	AV *mainstack;
123	SV **stack_sp;
124	OP *op;
125	SV **curpad;
126	AV *comppad;
127	CV *compcv;
128	SV **stack_base;
129	SV **stack_max;
130	SV **tmps_stack;
131	I32 tmps_floor;
132	I32 tmps_ix;
133	I32 tmps_max;
134	I32 *markstack;
135	I32 *markstack_ptr;
136	I32 *markstack_max;
137	I32 *scopestack;
138	I32 scopestack_ix;
139	I32 scopestack_max;
140	ANY *savestack;
141	I32 savestack_ix;
142	I32 savestack_max;
143	OP **retstack;
144	I32 retstack_ix;
145	I32 retstack_max;
146	PMOP *curpm;
147	COP *curcop;
148	JMPENV *top_env;
149
150	/* data associated with this coroutine (initial args) */
151	AV *args;
152	};	161	};
153		162
154	typedef struct coro *Coro__State;	163	typedef struct coro *Coro__State;
155	typedef struct coro *Coro__State_or_hashref;	164	typedef struct coro *Coro__State_or_hashref;
156		165
157	static AV *	166	static AV *
158	coro_clone_padlist (pTHX_ CV *cv)	167	coro_clone_padlist (CV *cv)
159	{	168	{
160	AV *padlist = CvPADLIST (cv);	169	AV *padlist = CvPADLIST (cv);
161	AV *newpadlist, *newpad;	170	AV *newpadlist, *newpad;
162		171
163	newpadlist = newAV ();	172	newpadlist = newAV ();
164	AvREAL_off (newpadlist);	173	AvREAL_off (newpadlist);
165	#if PERL_VERSION < 9	174	#if PERL_VERSION_ATLEAST (5,9,0)
		175	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		176	#else
166	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	177	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
167	#else
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169	#endif	178	#endif
170	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	179	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
171	--AvFILLp (padlist);	180	--AvFILLp (padlist);
172		181
173	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	182	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
175		184
176	return newpadlist;	185	return newpadlist;
177	}	186	}
178		187
179	static void	188	static void
180	free_padlist (pTHX_ AV *padlist)	189	free_padlist (AV *padlist)
181	{	190	{
182	/* may be during global destruction */	191	/* may be during global destruction */
183	if (SvREFCNT (padlist))	192	if (SvREFCNT (padlist))
184	{	193	{
185	I32 i = AvFILLp (padlist);	194	I32 i = AvFILLp (padlist);
…		…
206	AV *padlist;	215	AV *padlist;
207	AV *av = (AV *)mg->mg_obj;	216	AV *av = (AV *)mg->mg_obj;
208		217
209	/* casting is fun. */	218	/* casting is fun. */
210	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	219	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
211	free_padlist (aTHX_ padlist);	220	free_padlist (padlist);
212		221
213	SvREFCNT_dec (av);	222	SvREFCNT_dec (av);
214		223
215	return 0;	224	return 0;
216	}	225	}
217		226
218	#define PERL_MAGIC_coro PERL_MAGIC_ext	227	#define PERL_MAGIC_coro PERL_MAGIC_ext
219		228
220	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	229	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221		230
		231	#define CORO_MAGIC(cv) \
		232	SvMAGIC (cv) \
		233	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		234	? SvMAGIC (cv) \
		235	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		236	: 0
		237
222	/* the next two functions merely cache the padlists */	238	/* the next two functions merely cache the padlists */
223	static void	239	static void
224	get_padlist (pTHX_ CV *cv)	240	get_padlist (CV *cv)
225	{	241	{
226	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	242	MAGIC *mg = CORO_MAGIC (cv);
		243	AV *av;
227		244
228	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	245	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
229	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	246	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
230	else	247	else
231	{	248	{
232	#if 0	249	#if 0
233	/* this should work - but it doesn't :( */	250	/* this is probably cleaner, but also slower? */
234	CV *cp = Perl_cv_clone (aTHX_ cv);	251	CV *cp = Perl_cv_clone (cv);
235	CvPADLIST (cv) = CvPADLIST (cp);	252	CvPADLIST (cv) = CvPADLIST (cp);
236	CvPADLIST (cp) = 0;	253	CvPADLIST (cp) = 0;
237	SvREFCNT_dec (cp);	254	SvREFCNT_dec (cp);
238	#else	255	#else
239	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	256	CvPADLIST (cv) = coro_clone_padlist (cv);
240	#endif	257	#endif
241	}	258	}
242	}	259	}
243		260
244	static void	261	static void
245	put_padlist (pTHX_ CV *cv)	262	put_padlist (CV *cv)
246	{	263	{
247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	264	MAGIC *mg = CORO_MAGIC (cv);
		265	AV *av;
248		266
249	if (!mg)	267	if (!mg)
250	{	268	{
251	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	269	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
252	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	270	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
253	mg->mg_virtual = &vtbl_coro;	271	mg->mg_virtual = &vtbl_coro;
254	mg->mg_obj = (SV *)newAV ();	272	mg->mg_obj = (SV *)newAV ();
255	}	273	}
256		274
257	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	275	av = (AV *)mg->mg_obj;
		276
		277	if (AvFILLp (av) >= AvMAX (av))
		278	av_extend (av, AvMAX (av) + 1);
		279
		280	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
258	}	281	}
259		282
260	#define SB do {	283	#define SB do {
261	#define SE } while (0)	284	#define SE } while (0)
262		285
263	#define LOAD(state) load_state(aTHX_ (state));	286	#define LOAD(state) load_state ((state))
264	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	287	#define SAVE(state,flags) save_state ((state),(flags))
265		288
266	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	289	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
267		290
268	static void	291	static void
269	load_state(pTHX_ Coro__State c)	292	load_state (Coro__State c)
270	{	293	{
271	PL_dowarn = c->dowarn;	294	#define VAR(name,type) PL_ ## name = c->name;
272	PL_in_eval = c->in_eval;	295	# include "state.h"
273		296	#undef VAR
274	PL_curstackinfo = c->curstackinfo;
275	PL_curstack = c->curstack;
276	PL_mainstack = c->mainstack;
277	PL_stack_sp = c->stack_sp;
278	PL_op = c->op;
279	PL_curpad = c->curpad;
280	PL_comppad = c->comppad;
281	PL_compcv = c->compcv;
282	PL_stack_base = c->stack_base;
283	PL_stack_max = c->stack_max;
284	PL_tmps_stack = c->tmps_stack;
285	PL_tmps_floor = c->tmps_floor;
286	PL_tmps_ix = c->tmps_ix;
287	PL_tmps_max = c->tmps_max;
288	PL_markstack = c->markstack;
289	PL_markstack_ptr = c->markstack_ptr;
290	PL_markstack_max = c->markstack_max;
291	PL_scopestack = c->scopestack;
292	PL_scopestack_ix = c->scopestack_ix;
293	PL_scopestack_max = c->scopestack_max;
294	PL_savestack = c->savestack;
295	PL_savestack_ix = c->savestack_ix;
296	PL_savestack_max = c->savestack_max;
297	#if PERL_VERSION < 9
298	PL_retstack = c->retstack;
299	PL_retstack_ix = c->retstack_ix;
300	PL_retstack_max = c->retstack_max;
301	#endif
302	PL_curpm = c->curpm;
303	PL_curcop = c->curcop;
304	PL_top_env = c->top_env;
305		297
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	298	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	299	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	300	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
309		301
…		…
312	CV *cv;	304	CV *cv;
313		305
314	/* now do the ugly restore mess */	306	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	307	while ((cv = (CV *)POPs))
316	{	308	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	309	put_padlist (cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	310	CvDEPTH (cv) = PTR2IV (POPs);
323	}	311	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	312	}
327		313
328	PUTBACK;	314	PUTBACK;
329	}	315	}
330	}	316	}
331		317
332	static void	318	static void
333	save_state(pTHX_ Coro__State c, int flags)	319	save_state (Coro__State c, int flags)
334	{	320	{
335	{	321	{
336	dSP;	322	dSP;
337	I32 cxix = cxstack_ix;	323	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	324	PERL_CONTEXT *ccstk = cxstack;
…		…
349	{	335	{
350	while (cxix >= 0)	336	while (cxix >= 0)
351	{	337	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	338	PERL_CONTEXT *cx = &ccstk[cxix--];
353		339
354	if (CxTYPE(cx) == CXt_SUB)	340	if (CxTYPE (cx) == CXt_SUB)
355	{	341	{
356	CV *cv = cx->blk_sub.cv;	342	CV *cv = cx->blk_sub.cv;
		343
357	if (CvDEPTH(cv))	344	if (CvDEPTH (cv))
358	{	345	{
359	EXTEND (SP, CvDEPTH(cv)*2);	346	EXTEND (SP, 3);
360		347
361	while (--CvDEPTH(cv))
362	{
363	/* this tells the restore code to increment CvDEPTH */
364	PUSHs (Nullsv);
365	PUSHs ((SV *)cv);
366	}
367
368	PUSHs ((SV *)CvPADLIST(cv));	348	PUSHs ((SV *)CvPADLIST (cv));
		349	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	350	PUSHs ((SV *)cv);
370		351
		352	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	353	get_padlist (cv);
372	}	354	}
373	}	355	}
374	#ifdef CXt_FORMAT	356	#ifdef CXt_FORMAT
375	else if (CxTYPE(cx) == CXt_FORMAT)	357	else if (CxTYPE (cx) == CXt_FORMAT)
376	{	358	{
377	/* I never used formats, so how should I know how these are implemented? */	359	/* I never used formats, so how should I know how these are implemented? */
378	/* my bold guess is as a simple, plain sub... */	360	/* my bold guess is as a simple, plain sub... */
379	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");	361	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380	}	362	}
…		…
394		376
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	377	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	378	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	379	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
398		380
399	c->dowarn = PL_dowarn;	381	#define VAR(name,type)c->name = PL_ ## name;
400	c->in_eval = PL_in_eval;	382	# include "state.h"
401		383	#undef VAR
402	c->curstackinfo = PL_curstackinfo;
403	c->curstack = PL_curstack;
404	c->mainstack = PL_mainstack;
405	c->stack_sp = PL_stack_sp;
406	c->op = PL_op;
407	c->curpad = PL_curpad;
408	c->comppad = PL_comppad;
409	c->compcv = PL_compcv;
410	c->stack_base = PL_stack_base;
411	c->stack_max = PL_stack_max;
412	c->tmps_stack = PL_tmps_stack;
413	c->tmps_floor = PL_tmps_floor;
414	c->tmps_ix = PL_tmps_ix;
415	c->tmps_max = PL_tmps_max;
416	c->markstack = PL_markstack;
417	c->markstack_ptr = PL_markstack_ptr;
418	c->markstack_max = PL_markstack_max;
419	c->scopestack = PL_scopestack;
420	c->scopestack_ix = PL_scopestack_ix;
421	c->scopestack_max = PL_scopestack_max;
422	c->savestack = PL_savestack;
423	c->savestack_ix = PL_savestack_ix;
424	c->savestack_max = PL_savestack_max;
425	#if PERL_VERSION < 9
426	c->retstack = PL_retstack;
427	c->retstack_ix = PL_retstack_ix;
428	c->retstack_max = PL_retstack_max;
429	#endif
430	c->curpm = PL_curpm;
431	c->curcop = PL_curcop;
432	c->top_env = PL_top_env;
433	}	384	}
434		385
435	/*	386	/*
436	* allocate various perl stacks. This is an exact copy	387	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	388	* of perl.c:init_stacks, except that it uses less memory
438	* on the (sometimes correct) assumption that coroutines do	389	* on the (sometimes correct) assumption that coroutines do
439	* not usually need a lot of stackspace.	390	* not usually need a lot of stackspace.
440	*/	391	*/
441	static void	392	static void
442	coro_init_stacks (pTHX)	393	coro_init_stacks ()
443	{	394	{
444	LOCK;
445
446	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	395	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
447	PL_curstackinfo->si_type = PERLSI_MAIN;	396	PL_curstackinfo->si_type = PERLSI_MAIN;
448	PL_curstack = PL_curstackinfo->si_stack;	397	PL_curstack = PL_curstackinfo->si_stack;
449	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	398	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
450		399
451	PL_stack_base = AvARRAY(PL_curstack);	400	PL_stack_base = AvARRAY(PL_curstack);
452	PL_stack_sp = PL_stack_base;	401	PL_stack_sp = PL_stack_base;
453	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	402	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
454		403
455	New(50,PL_tmps_stack,96,SV*);	404	New(50,PL_tmps_stack,128,SV*);
456	PL_tmps_floor = -1;	405	PL_tmps_floor = -1;
457	PL_tmps_ix = -1;	406	PL_tmps_ix = -1;
458	PL_tmps_max = 96;	407	PL_tmps_max = 128;
459		408
460	New(54,PL_markstack,16,I32);	409	New(54,PL_markstack,32,I32);
461	PL_markstack_ptr = PL_markstack;	410	PL_markstack_ptr = PL_markstack;
462	PL_markstack_max = PL_markstack + 16;	411	PL_markstack_max = PL_markstack + 32;
463		412
464	#ifdef SET_MARK_OFFSET	413	#ifdef SET_MARK_OFFSET
465	SET_MARK_OFFSET;	414	SET_MARK_OFFSET;
466	#endif	415	#endif
467		416
468	New(54,PL_scopestack,16,I32);	417	New(54,PL_scopestack,32,I32);
469	PL_scopestack_ix = 0;	418	PL_scopestack_ix = 0;
470	PL_scopestack_max = 16;	419	PL_scopestack_max = 32;
471		420
472	New(54,PL_savestack,96,ANY);	421	New(54,PL_savestack,64,ANY);
473	PL_savestack_ix = 0;	422	PL_savestack_ix = 0;
474	PL_savestack_max = 96;	423	PL_savestack_max = 64;
475		424
476	#if PERL_VERSION < 9	425	#if !PERL_VERSION_ATLEAST (5,9,0)
477	New(54,PL_retstack,8,OP*);	426	New(54,PL_retstack,16,OP*);
478	PL_retstack_ix = 0;	427	PL_retstack_ix = 0;
479	PL_retstack_max = 8;	428	PL_retstack_max = 16;
480	#endif	429	#endif
481
482	UNLOCK;
483	}	430	}
484		431
485	/*	432	/*
486	* destroy the stacks, the callchain etc...	433	* destroy the stacks, the callchain etc...
487	*/	434	*/
488	static void	435	static void
489	destroy_stacks(pTHX)	436	coro_destroy_stacks ()
490	{	437	{
491	if (!IN_DESTRUCT)	438	if (!IN_DESTRUCT)
492	{	439	{
493	/* is this ugly, I ask? */	440	/* is this ugly, I ask? */
494	LEAVE_SCOPE (0);	441	LEAVE_SCOPE (0);
…		…
525		472
526	Safefree (PL_tmps_stack);	473	Safefree (PL_tmps_stack);
527	Safefree (PL_markstack);	474	Safefree (PL_markstack);
528	Safefree (PL_scopestack);	475	Safefree (PL_scopestack);
529	Safefree (PL_savestack);	476	Safefree (PL_savestack);
530	#if PERL_VERSION < 9	477	#if !PERL_VERSION_ATLEAST (5,9,0)
531	Safefree (PL_retstack);	478	Safefree (PL_retstack);
532	#endif	479	#endif
533	}	480	}
534		481
535	static void	482	static void
536	allocate_stack (Coro__State ctx, int alloc)	483	setup_coro (struct coro *coro)
537	{
538	coro_stack *stack;
539
540	New (0, stack, 1, coro_stack);
541
542	stack->refcnt = 1;
543	stack->usecnt = 1;
544	stack->gencnt = ctx->gencnt = 0;
545
546	if (alloc)
547	{
548	#if HAVE_MMAP
549	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
551	if (stack->sptr != (void *)-1)
552	{
553	# if STACKGUARD
554	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
555	# endif
556	}
557	else
558	#endif
559	{
560	stack->ssize = - (STACKSIZE * (long)sizeof (long));
561	New (0, stack->sptr, STACKSIZE, long);
562	}
563	}
564	else
565	stack->sptr = 0;
566
567	ctx->stack = stack;
568	}
569
570	static void
571	deallocate_stack (Coro__State ctx)
572	{
573	coro_stack *stack = ctx->stack;
574
575	ctx->stack = 0;
576
577	if (stack)
578	{
579	if (!--stack->refcnt)
580	{
581	#ifdef HAVE_MMAP
582	if (stack->ssize > 0 && stack->sptr)
583	munmap (stack->sptr, stack->ssize);
584	else
585	#endif
586	Safefree (stack->sptr);
587
588	Safefree (stack);
589	}
590	else if (ctx->gencnt == stack->gencnt)
591	--stack->usecnt;
592	}
593	}
594
595	static void
596	setup_coro (void *arg)
597	{	484	{
598	/*	485	/*
599	* emulate part of the perl startup here.	486	* emulate part of the perl startup here.
600	*/	487	*/
601	dTHX;
602	dSP;
603	Coro__State ctx = (Coro__State)arg;
604	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
605		488
606	coro_init_stacks (aTHX);	489	coro_init_stacks ();
607	/*PL_curcop = 0;*/	490
608	/*PL_in_eval = PL_in_eval;*/ /* inherit */	491	PL_curcop = &PL_compiling;
		492	PL_in_eval = EVAL_NULL;
		493	PL_curpm = 0;
		494	PL_localizing = 0;
		495	PL_dirty = 0;
		496	PL_restartop = 0;
		497
		498	{
		499	dSP;
		500	LOGOP myop;
		501
		502	/* I have no idea why this is needed, but it is */
		503	PUSHMARK (SP);
		504
609	SvREFCNT_dec (GvAV (PL_defgv));	505	SvREFCNT_dec (GvAV (PL_defgv));
610	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	506	GvAV (PL_defgv) = coro->args; coro->args = 0;
611		507
612	SPAGAIN;
613
614	if (ctx->stack)
615	{
616	ctx->cursp = 0;
617
618	PUSHMARK(SP);
619	PUTBACK;
620	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
621
622	if (SvTRUE (ERRSV))
623	croak (NULL);
624	else
625	croak ("FATAL: CCTXT coroutine returned!");
626	}
627	else
628	{
629	UNOP myop;
630
631	Zero(&myop, 1, UNOP);	508	Zero (&myop, 1, LOGOP);
632	myop.op_next = Nullop;	509	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;	510	myop.op_flags = OPf_WANT_VOID;
634		511
635	PL_op = (OP *)&myop;	512	PL_op = (OP *)&myop;
636		513
637	PUSHMARK(SP);	514	PUSHMARK (SP);
638	XPUSHs (sub_init);	515	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
639	/*
640	* the next line is slightly wrong, as PL_op->op_next
641	* is actually being executed so we skip the first op.
642	* that doesn't matter, though, since it is only
643	* pp_nextstate and we never return...
644	* ah yes, and I don't care anyways ;)
645	*/
646	PUTBACK;	516	PUTBACK;
647	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	517	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
648	SPAGAIN;	518	SPAGAIN;
		519	}
649		520
650	ENTER; /* necessary e.g. for dounwind */	521	ENTER; /* necessary e.g. for dounwind */
651	}
652	}	522	}
653		523
654	static void	524	static void
655	continue_coro (void *arg)	525	free_coro_mortal ()
656	{	526	{
657	/*
658	* this is a _very_ stripped down perl interpreter ;)
659	*/
660	dTHX;
661	Coro__State ctx = (Coro__State)arg;
662
663	PL_top_env = &PL_start_env;
664
665	ctx->cursp = 0;
666	PL_op = PL_op->op_next;
667	CALLRUNOPS(aTHX);
668
669	abort ();
670	}
671
672	/* never call directly, always through the coro_state_transfer global variable */
673	static void
674	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)
675	{
676	dSTACKLEVEL;
677
678	if (prev != next)
679	{
680	/* has this coro been created yet? */
681	if (next->mainstack)
682	{
683	LOCK;
684	SAVE (prev, flags);
685	LOAD (next);
686	UNLOCK;
687
688	/* mark this state as in-use */
689	next->mainstack = 0;
690	next->tmps_ix = -2;
691
692	/* stacklevel changed? if yes, grab the stack for us! */
693	if (flags & TRANSFER_SAVE_CCTXT)
694	{
695	if (!prev->stack)
696	allocate_stack (prev, 0);
697	else if (prev->cursp != stacklevel
698	&& prev->stack->usecnt > 1)
699	{
700	prev->gencnt = ++prev->stack->gencnt;
701	prev->stack->usecnt = 1;
702	}
703
704	/* has our stack been invalidated? */
705	if (next->stack && next->stack->gencnt != next->gencnt)
706	{
707	deallocate_stack (next);
708	allocate_stack (next, 1);
709	coro_create (&(next->stack->cctx),
710	continue_coro, (void *)next,
711	next->stack->sptr, labs (next->stack->ssize));
712	}
713
714	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715	prev->cursp = stacklevel;
716	/* don't add any code here */
717	}
718	else
719	next->cursp = stacklevel;
720	}
721	else if (next->tmps_ix == -2)
722	croak ("tried to transfer to running coroutine");
723	else
724	{
725	LOCK;
726	SAVE (prev, -1); /* first get rid of the old state */
727	UNLOCK;
728
729	/* create the coroutine for the first time */
730	if (flags & TRANSFER_SAVE_CCTXT)
731	{
732	if (!prev->stack)
733	allocate_stack (prev, 0);
734
735	/* the new coroutine starts with start_env again */
736	PL_top_env = &PL_start_env;
737
738	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
739	{
740	setup_coro (next);
741	next->cursp = stacklevel;
742
743	prev->stack->refcnt++;
744	prev->stack->usecnt++;
745	next->stack = prev->stack;
746	next->gencnt = prev->gencnt;
747	}
748	else
749	{
750	assert (!next->stack);
751	allocate_stack (next, 1);
752	coro_create (&(next->stack->cctx),
753	setup_coro, (void *)next,
754	next->stack->sptr, labs (next->stack->ssize));
755	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
756	prev->cursp = stacklevel;
757	/* don't add any code here */
758	}
759	}
760	else
761	{
762	setup_coro (next);
763	next->cursp = stacklevel;
764	}
765	}
766	}
767
768	LOCK;
769	if (coro_mortal)	527	if (coro_mortal)
770	{	528	{
771	SvREFCNT_dec (coro_mortal);	529	SvREFCNT_dec (coro_mortal);
772	coro_mortal = 0;	530	coro_mortal = 0;
773	}	531	}
		532	}
		533
		534	static void NOINLINE
		535	prepare_cctx (coro_cctx *cctx)
		536	{
		537	dSP;
		538	LOGOP myop;
		539
		540	Zero (&myop, 1, LOGOP);
		541	myop.op_next = PL_op;
		542	myop.op_flags = OPf_WANT_VOID;
		543
		544	sv_setiv (get_sv ("Coro::State::_cctx", FALSE), PTR2IV (cctx));
		545
		546	PUSHMARK (SP);
		547	XPUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		548	PUTBACK;
		549	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		550	SPAGAIN;
		551	}
		552
		553	static void
		554	coro_run (void *arg)
		555	{
		556	/* coro_run is the alternative epilogue of transfer() */
774	UNLOCK;	557	UNLOCK;
775	}
776		558
777	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	559	/*
		560	* this is a _very_ stripped down perl interpreter ;)
		561	*/
		562	PL_top_env = &PL_start_env;
778		563
779	#define SV_CORO(sv,func) \	564	/* inject call to cctx_init */
780	do { \	565	prepare_cctx ((coro_cctx *)arg);
781	if (SvROK (sv)) \
782	sv = SvRV (sv); \
783	\
784	if (SvTYPE (sv) == SVt_PVHV) \
785	{ \
786	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
787	\
788	if (!he) \
789	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
790	\
791	(sv) = SvRV (HeVAL(he)); \
792	} \
793	\
794	/* must also be changed inside Coro::Cont::yield */ \
795	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
796	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
797	\
798	} while(0)
799		566
800	#define SvSTATE(sv) INT2PTR (struct coro *, SvIVX (sv))	567	/* somebody will hit me for both perl_run and PL_restartop */
		568	perl_run (PL_curinterp);
801		569
		570	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		571	abort ();
		572	}
		573
		574	static coro_cctx *
		575	cctx_new ()
		576	{
		577	coro_cctx *cctx;
		578
		579	++cctx_count;
		580
		581	New (0, cctx, 1, coro_cctx);
		582
		583	#if HAVE_MMAP
		584
		585	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		586	/* mmap suppsedly does allocate-on-write for us */
		587	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		588
		589	if (cctx->sptr == (void *)-1)
		590	{
		591	perror ("FATAL: unable to mmap stack for coroutine");
		592	_exit (EXIT_FAILURE);
		593	}
		594
		595	# if STACKGUARD
		596	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		597	# endif
		598
		599	#else
		600
		601	cctx->ssize = STACKSIZE * (long)sizeof (long);
		602	New (0, cctx->sptr, STACKSIZE, long);
		603
		604	if (!cctx->sptr)
		605	{
		606	perror ("FATAL: unable to malloc stack for coroutine");
		607	_exit (EXIT_FAILURE);
		608	}
		609
		610	#endif
		611
		612	#if USE_VALGRIND
		613	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		614	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		615	cctx->ssize + (char *)cctx->sptr
		616	);
		617	#endif
		618
		619	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		620
		621	return cctx;
		622	}
		623
		624	static void
		625	cctx_destroy (coro_cctx *cctx)
		626	{
		627	if (!cctx)
		628	return;
		629
		630	--cctx_count;
		631
		632	#if USE_VALGRIND
		633	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		634	#endif
		635
		636	#if HAVE_MMAP
		637	munmap (cctx->sptr, cctx->ssize);
		638	#else
		639	Safefree (cctx->sptr);
		640	#endif
		641
		642	Safefree (cctx);
		643	}
		644
		645	static coro_cctx *
		646	cctx_get ()
		647	{
		648	coro_cctx *cctx;
		649
		650	if (cctx_first)
		651	{
		652	cctx = cctx_first;
		653	cctx_first = cctx->next;
		654	--cctx_idle;
		655	}
		656	else
		657	{
		658	cctx = cctx_new ();
		659	PL_op = PL_op->op_next;
		660	}
		661
		662	return cctx;
		663	}
		664
		665	static void
		666	cctx_put (coro_cctx *cctx)
		667	{
		668	/* free another cctx if overlimit */
		669	if (cctx_idle >= MAX_IDLE_CCTX)
		670	{
		671	coro_cctx *first = cctx_first;
		672	cctx_first = first->next;
		673	--cctx_idle;
		674
		675	assert (!first->inuse);
		676	cctx_destroy (first);
		677	}
		678
		679	++cctx_idle;
		680	cctx->next = cctx_first;
		681	cctx_first = cctx;
		682	}
		683
		684	/* never call directly, always through the coro_state_transfer global variable */
		685	static void NOINLINE
		686	transfer (struct coro *prev, struct coro *next, int flags)
		687	{
		688	dSTACKLEVEL;
		689
		690	/* sometimes transfer is only called to set idle_sp */
		691	if (flags == TRANSFER_SET_STACKLEVEL)
		692	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		693	else if (prev != next)
		694	{
		695	coro_cctx *prev__cctx;
		696
		697	if (prev->flags & CF_NEW)
		698	{
		699	/* create a new empty context */
		700	Newz (0, prev->cctx, 1, coro_cctx);
		701	prev->cctx->inuse = 1;
		702	prev->flags &= ~CF_NEW;
		703	prev->flags |= CF_RUNNING;
		704	}
		705
		706	/*TODO: must not croak here */
		707	if (!prev->flags & CF_RUNNING)
		708	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		709
		710	if (next->flags & CF_RUNNING)
		711	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		712
		713	prev->flags &= ~CF_RUNNING;
		714	next->flags |= CF_RUNNING;
		715
		716	LOCK;
		717
		718	if (next->mainstack)
		719	{
		720	/* coroutine already started */
		721	SAVE (prev, flags);
		722	LOAD (next);
		723	}
		724	else
		725	{
		726	/* need to start coroutine */
		727	assert (next->flags & CF_NEW);
		728	next->flags &= ~CF_NEW;
		729	/* first get rid of the old state */
		730	SAVE (prev, -1);
		731	/* setup coroutine call */
		732	setup_coro (next);
		733	/* need a new stack */
		734	assert (!next->stack);
		735	}
		736
		737	prev__cctx = prev->cctx;
		738
		739	/* possibly "free" the cctx */
		740	if (prev__cctx->idle_sp == STACKLEVEL && 0)
		741	{
		742	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		743	assert (PL_top_env == prev__cctx->top_env);
		744
		745	prev->cctx = 0;
		746
		747	cctx_put (prev__cctx);
		748	prev__cctx->inuse = 0;
		749	}
		750
		751	if (!next->cctx)
		752	{
		753	next->cctx = cctx_get ();
		754	assert (!next->cctx->inuse);
		755	next->cctx->inuse = 1;
		756	}
		757
		758	if (prev__cctx != next->cctx)
		759	{
		760	prev__cctx->top_env = PL_top_env;
		761	PL_top_env = next->cctx->top_env;
		762	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		763	}
		764
		765	free_coro_mortal ();
		766
		767	UNLOCK;
		768	}
		769	}
		770
		771	struct transfer_args
		772	{
		773	struct coro *prev, *next;
		774	int flags;
		775	};
		776
		777	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		778
		779	static void
		780	coro_state_destroy (struct coro *coro)
		781	{
		782	if (coro->refcnt--)
		783	return;
		784
		785	if (coro->mainstack && coro->mainstack != main_mainstack)
		786	{
		787	struct coro temp;
		788
		789	if (coro->flags & CF_RUNNING)
		790	croak ("FATAL: tried to destroy currently running coroutine");
		791
		792	SAVE ((&temp), TRANSFER_SAVE_ALL);
		793	LOAD (coro);
		794
		795	coro_destroy_stacks ();
		796
		797	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		798
		799	coro->mainstack = 0;
		800	}
		801
		802	cctx_destroy (coro->cctx);
		803	SvREFCNT_dec (coro->args);
		804	Safefree (coro);
		805	}
		806
802	static void	807	static int
		808	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		809	{
		810	struct coro *coro = (struct coro *)mg->mg_ptr;
		811	mg->mg_ptr = 0;
		812
		813	coro_state_destroy (coro);
		814
		815	return 0;
		816	}
		817
		818	static int
		819	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		820	{
		821	struct coro *coro = (struct coro *)mg->mg_ptr;
		822
		823	++coro->refcnt;
		824
		825	return 0;
		826	}
		827
		828	static MGVTBL coro_state_vtbl = {
		829	0, 0, 0, 0,
		830	coro_state_clear,
		831	0,
		832	#ifdef MGf_DUP
		833	coro_state_dup,
		834	#else
		835	# define MGf_DUP 0
		836	#endif
		837	};
		838
		839	static struct coro *
		840	SvSTATE (SV *coro)
		841	{
		842	HV *stash;
		843	MAGIC *mg;
		844
		845	if (SvROK (coro))
		846	coro = SvRV (coro);
		847
		848	stash = SvSTASH (coro);
		849	if (stash != coro_stash && stash != coro_state_stash)
		850	{
		851	/* very slow, but rare, check */
		852	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		853	croak ("Coro::State object required");
		854	}
		855
		856	mg = SvMAGIC (coro);
		857	assert (mg->mg_type == PERL_MAGIC_ext);
		858	return (struct coro *)mg->mg_ptr;
		859	}
		860
		861	static void
		862	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		863	{
		864	ta->prev = SvSTATE (prev);
		865	ta->next = SvSTATE (next);
		866	ta->flags = flags;
		867	}
		868
		869	static void
803	api_transfer (pTHX_ SV *prev, SV *next, int flags)	870	api_transfer (SV *prev, SV *next, int flags)
804	{	871	{
805	SV_CORO (prev, "Coro::transfer");	872	struct transfer_args ta;
806	SV_CORO (next, "Coro::transfer");
807		873
808	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	874	prepare_transfer (&ta, prev, next, flags);
		875	TRANSFER (ta);
809	}	876	}
810		877
811	/** Coro ********************************************************************/	878	/** Coro ********************************************************************/
812		879
813	#define PRIO_MAX 3	880	#define PRIO_MAX 3
…		…
816	#define PRIO_LOW -1	883	#define PRIO_LOW -1
817	#define PRIO_IDLE -3	884	#define PRIO_IDLE -3
818	#define PRIO_MIN -4	885	#define PRIO_MIN -4
819		886
820	/* for Coro.pm */	887	/* for Coro.pm */
821	static GV *coro_current, *coro_idle;	888	static SV *coro_current;
822	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];	889	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
823	static int coro_nready;	890	static int coro_nready;
824		891
825	static void	892	static void
826	coro_enq (pTHX_ SV *sv)	893	coro_enq (SV *coro_sv)
827	{	894	{
828	SV **xprio;
829	int prio;
830
831	if (SvTYPE (sv) != SVt_PVHV)
832	croak ("Coro::ready tried to enqueue something that is not a coroutine");
833
834	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
835	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
836
837	prio = prio > PRIO_MAX ? PRIO_MAX
838	: prio < PRIO_MIN ? PRIO_MIN
839	: prio;
840
841	av_push (coro_ready [prio - PRIO_MIN], sv);	895	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
842	coro_nready++;	896	coro_nready++;
843	}	897	}
844		898
845	static SV *	899	static SV *
846	coro_deq (pTHX_ int min_prio)	900	coro_deq (int min_prio)
847	{	901	{
848	int prio = PRIO_MAX - PRIO_MIN;	902	int prio = PRIO_MAX - PRIO_MIN;
849		903
850	min_prio -= PRIO_MIN;	904	min_prio -= PRIO_MIN;
851	if (min_prio < 0)	905	if (min_prio < 0)
…		…
859	}	913	}
860		914
861	return 0;	915	return 0;
862	}	916	}
863		917
864	static void	918	static int
865	api_ready (SV *coro)	919	api_ready (SV *coro_sv)
866	{	920	{
867	dTHX;	921	struct coro *coro;
868		922
869	if (SvROK (coro))	923	if (SvROK (coro_sv))
870	coro = SvRV (coro);	924	coro_sv = SvRV (coro_sv);
		925
		926	coro = SvSTATE (coro_sv);
		927
		928	if (coro->flags & CF_READY)
		929	return 0;
		930
		931	#if 0 /* this is actually harmless */
		932	if (coro->flags & CF_RUNNING)
		933	croak ("Coro::ready called on currently running coroutine");
		934	#endif
		935
		936	coro->flags |= CF_READY;
871		937
872	LOCK;	938	LOCK;
873	coro_enq (aTHX_ SvREFCNT_inc (coro));	939	coro_enq (SvREFCNT_inc (coro_sv));
874	UNLOCK;	940	UNLOCK;
		941
		942	return 1;
		943	}
		944
		945	static int
		946	api_is_ready (SV *coro_sv)
		947	{
		948	return !!SvSTATE (coro_sv)->flags & CF_READY;
		949	}
		950
		951	static void
		952	prepare_schedule (struct transfer_args *ta)
		953	{
		954	SV *prev, *next;
		955
		956	for (;;)
		957	{
		958	LOCK;
		959	next = coro_deq (PRIO_MIN);
		960	UNLOCK;
		961
		962	if (next)
		963	break;
		964
		965	{
		966	dSP;
		967
		968	ENTER;
		969	SAVETMPS;
		970
		971	PUSHMARK (SP);
		972	PUTBACK;
		973	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		974
		975	FREETMPS;
		976	LEAVE;
		977	}
		978	}
		979
		980	prev = SvRV (coro_current);
		981	SvRV_set (coro_current, next);
		982
		983	/* free this only after the transfer */
		984	LOCK;
		985	free_coro_mortal ();
		986	UNLOCK;
		987	coro_mortal = prev;
		988
		989	assert (!SvROK(prev));//D
		990	assert (!SvROK(next));//D
		991
		992	ta->prev = SvSTATE (prev);
		993	ta->next = SvSTATE (next);
		994	ta->flags = TRANSFER_SAVE_ALL;
		995
		996	assert (ta->flags & CF_READY);
		997	ta->next->flags &= ~CF_READY;
		998	}
		999
		1000	static void
		1001	prepare_cede (struct transfer_args *ta)
		1002	{
		1003	api_ready (coro_current);
		1004
		1005	prepare_schedule (ta);
875	}	1006	}
876		1007
877	static void	1008	static void
878	api_schedule (void)	1009	api_schedule (void)
879	{	1010	{
880	dTHX;	1011	struct transfer_args ta;
881		1012
882	SV *prev, *next;	1013	prepare_schedule (&ta);
883		1014	TRANSFER (ta);
884	LOCK;
885
886	prev = SvRV (GvSV (coro_current));
887	next = coro_deq (aTHX_ PRIO_MIN);
888
889	if (!next)
890	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
891
892	/* free this only after the transfer */
893	coro_mortal = prev;
894	SV_CORO (prev, "Coro::schedule");
895
896	SvRV (GvSV (coro_current)) = next;
897
898	SV_CORO (next, "Coro::schedule");
899
900	UNLOCK;
901
902	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
903	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
904	}	1015	}
905		1016
906	static void	1017	static void
907	api_cede (void)	1018	api_cede (void)
908	{	1019	{
909	dTHX;	1020	struct transfer_args ta;
910		1021
911	LOCK;	1022	prepare_cede (&ta);
912	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1023	TRANSFER (ta);
913	UNLOCK;
914
915	api_schedule ();
916	}	1024	}
917		1025
918	MODULE = Coro::State PACKAGE = Coro::State	1026	MODULE = Coro::State PACKAGE = Coro::State
919		1027
920	PROTOTYPES: ENABLE	1028	PROTOTYPES: DISABLE
921		1029
922	BOOT:	1030	BOOT:
923	{ /* {} necessary for stoopid perl-5.6.x */	1031	{
924	#ifdef USE_ITHREADS	1032	#ifdef USE_ITHREADS
925	MUTEX_INIT (&coro_mutex);	1033	MUTEX_INIT (&coro_mutex);
926	#endif	1034	#endif
927	BOOT_PAGESIZE;	1035	BOOT_PAGESIZE;
928		1036
929	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
930	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
931	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1037	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
932		1038
933	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1039	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
934	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1040	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
935	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1041	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
936	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
937		1042
938	main_mainstack = PL_mainstack;	1043	main_mainstack = PL_mainstack;
939		1044
940	coroapi.ver = CORO_API_VERSION;	1045	coroapi.ver = CORO_API_VERSION;
941	coroapi.transfer = api_transfer;	1046	coroapi.transfer = api_transfer;
942	}
943		1047
944	Coro::State	1048	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
945	_newprocess(args)	1049	}
946	SV * args	1050
947	PROTOTYPE: $	1051	SV *
		1052	new (char *klass, ...)
948	CODE:	1053	CODE:
949	Coro__State coro;	1054	{
		1055	struct coro *coro;
		1056	HV *hv;
		1057	int i;
950		1058
951	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
952	croak ("Coro::State::_newprocess expects an arrayref");
953
954	Newz (0, coro, 1, struct coro);	1059	Newz (0, coro, 1, struct coro);
		1060	coro->args = newAV ();
		1061	coro->flags = CF_NEW;
955		1062
956	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1063	hv = newHV ();
957	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1064	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
958	/*coro->stack = 0;*/	1065	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
959		1066
960	RETVAL = coro;	1067	for (i = 1; i < items; i++)
		1068	av_push (coro->args, newSVsv (ST (i)));
		1069	}
961	OUTPUT:	1070	OUTPUT:
962	RETVAL	1071	RETVAL
963		1072
964	void	1073	void
965	transfer(prev, next, flags)	1074	_set_stacklevel (...)
966	SV *prev	1075	ALIAS:
967	SV *next	1076	Coro::State::transfer = 1
968	int flags	1077	Coro::schedule = 2
969	PROTOTYPE: @	1078	Coro::cede = 3
		1079	Coro::Cont::yield = 4
970	CODE:	1080	CODE:
971	PUTBACK;	1081	{
972	SV_CORO (next, "Coro::transfer");	1082	struct transfer_args ta;
973	SV_CORO (prev, "Coro::transfer");	1083
974	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1084	switch (ix)
975	SPAGAIN;	1085	{
		1086	case 0:
		1087	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1088	ta.next = 0;
		1089	ta.flags = TRANSFER_SET_STACKLEVEL;
		1090	break;
		1091
		1092	case 1:
		1093	if (items != 3)
		1094	croak ("Coro::State::transfer (prev,next,flags) expects three arguments, not %d", items);
		1095
		1096	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1097	break;
		1098
		1099	case 2:
		1100	prepare_schedule (&ta);
		1101	break;
		1102
		1103	case 3:
		1104	prepare_cede (&ta);
		1105	break;
		1106
		1107	case 4:
		1108	{
		1109	SV *yieldstack;
		1110	SV *sv;
		1111	AV *defav = GvAV (PL_defgv);
		1112
		1113	yieldstack = *hv_fetch (
		1114	(HV *)SvRV (coro_current),
		1115	"yieldstack", sizeof ("yieldstack") - 1,
		1116	0
		1117	);
		1118
		1119	/* set up @_ -- ugly */
		1120	av_clear (defav);
		1121	av_fill (defav, items - 1);
		1122	while (items--)
		1123	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1124
		1125	sv = av_pop ((AV *)SvRV (yieldstack));
		1126	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1127	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1128	ta.flags = 0;
		1129	SvREFCNT_dec (sv);
		1130	}
		1131	break;
		1132
		1133	}
		1134
		1135	TRANSFER (ta);
		1136	}
976		1137
977	void	1138	void
978	DESTROY(coro)	1139	_clone_state_from (SV *dst, SV *src)
979	Coro::State coro	1140	CODE:
980	CODE:	1141	{
		1142	struct coro *coro_src = SvSTATE (src);
981		1143
982	if (coro->mainstack && coro->mainstack != main_mainstack)	1144	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
983	{
984	struct coro temp;
985		1145
986	PUTBACK;	1146	++coro_src->refcnt;
987	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1147	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
988	LOAD (aTHX_ coro);	1148	}
989	SPAGAIN;
990
991	destroy_stacks (aTHX);
992
993	LOAD ((&temp)); /* this will get rid of defsv etc.. */
994	SPAGAIN;
995
996	coro->mainstack = 0;
997	}
998
999	deallocate_stack (coro);
1000	SvREFCNT_dec (coro->args);
1001	Safefree (coro);
1002		1149
1003	void	1150	void
1004	_exit(code)	1151	_exit (code)
1005	int code	1152	int code
1006	PROTOTYPE: $	1153	PROTOTYPE: $
1007	CODE:	1154	CODE:
1008	_exit (code);	1155	_exit (code);
1009		1156
1010	MODULE = Coro::State PACKAGE = Coro::Cont	1157	int
		1158	cctx_count ()
		1159	CODE:
		1160	RETVAL = cctx_count;
		1161	OUTPUT:
		1162	RETVAL
1011		1163
1012	void	1164	int
1013	yield(...)	1165	cctx_idle ()
1014	PROTOTYPE: @	1166	CODE:
1015	CODE:	1167	RETVAL = cctx_idle;
1016	SV *yieldstack;	1168	OUTPUT:
1017	SV *sv;	1169	RETVAL
1018	AV *defav = GvAV (PL_defgv);
1019	struct coro *prev, *next;
1020
1021	yieldstack = *hv_fetch (
1022	(HV *)SvRV (GvSV (coro_current)),
1023	"yieldstack", sizeof ("yieldstack") - 1,
1024	0
1025	);
1026
1027	/* set up @_ -- ugly */
1028	av_clear (defav);
1029	av_fill (defav, items - 1);
1030	while (items--)
1031	av_store (defav, items, SvREFCNT_inc (ST(items)));
1032
1033	sv = av_pop ((AV *)SvRV (yieldstack));
1034	prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1035	next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1036	SvREFCNT_dec (sv);
1037
1038	coro_state_transfer (aTHX_ prev, next, 0);
1039		1170
1040	MODULE = Coro::State PACKAGE = Coro	1171	MODULE = Coro::State PACKAGE = Coro
1041		1172
1042	BOOT:	1173	BOOT:
1043	{	1174	{
1044	int i;	1175	int i;
		1176
1045	HV *stash = gv_stashpv ("Coro", TRUE);	1177	coro_stash = gv_stashpv ("Coro", TRUE);
1046		1178
1047	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1179	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1048	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1180	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1049	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1181	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1050	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1182	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1051	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1183	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1052	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1184	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1053		1185
1054	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1186	coro_current = get_sv ("Coro::current", FALSE);
1055	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1187	SvREADONLY_on (coro_current);
1056		1188
1057	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1189	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1058	coro_ready[i] = newAV ();	1190	coro_ready[i] = newAV ();
1059		1191
1060	{	1192	{
1061	SV *sv = perl_get_sv("Coro::API", 1);	1193	SV *sv = perl_get_sv("Coro::API", 1);
1062		1194
1063	coroapi.schedule = api_schedule;	1195	coroapi.schedule = api_schedule;
1064	coroapi.cede = api_cede;	1196	coroapi.cede = api_cede;
1065	coroapi.ready = api_ready;	1197	coroapi.ready = api_ready;
		1198	coroapi.is_ready = api_is_ready;
1066	coroapi.nready = &coro_nready;	1199	coroapi.nready = &coro_nready;
1067	coroapi.current = coro_current;	1200	coroapi.current = coro_current;
1068		1201
1069	GCoroAPI = &coroapi;	1202	GCoroAPI = &coroapi;
1070	sv_setiv (sv, (IV)&coroapi);	1203	sv_setiv (sv, (IV)&coroapi);
1071	SvREADONLY_on (sv);	1204	SvREADONLY_on (sv);
1072	}	1205	}
1073	}	1206	}
1074		1207
1075	#if !PERL_MICRO	1208	int
		1209	prio (Coro::State coro, int newprio = 0)
		1210	ALIAS:
		1211	nice = 1
		1212	CODE:
		1213	{
		1214	RETVAL = coro->prio;
1076		1215
1077	void	1216	if (items > 1)
		1217	{
		1218	if (ix)
		1219	newprio += coro->prio;
		1220
		1221	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1222	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1223
		1224	coro->prio = newprio;
		1225	}
		1226	}
		1227
		1228	SV *
1078	ready(self)	1229	ready (SV *self)
1079	SV * self
1080	PROTOTYPE: $	1230	PROTOTYPE: $
1081	CODE:	1231	CODE:
1082	api_ready (self);	1232	RETVAL = boolSV (api_ready (self));
		1233	OUTPUT:
		1234	RETVAL
1083		1235
1084	#endif	1236	SV *
		1237	is_ready (SV *self)
		1238	PROTOTYPE: $
		1239	CODE:
		1240	RETVAL = boolSV (api_is_ready (self));
		1241	OUTPUT:
		1242	RETVAL
1085		1243
1086	int	1244	int
1087	nready(...)	1245	nready (...)
1088	PROTOTYPE:	1246	PROTOTYPE:
1089	CODE:	1247	CODE:
1090	RETVAL = coro_nready;	1248	RETVAL = coro_nready;
1091	OUTPUT:	1249	OUTPUT:
1092	RETVAL	1250	RETVAL
1093		1251
1094	void	1252	void
1095	schedule(...)	1253	_set_current (SV *current)
1096	PROTOTYPE:	1254	PROTOTYPE: $
1097	CODE:	1255	CODE:
1098	api_schedule ();	1256	SvREFCNT_dec (SvRV (coro_current));
		1257	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1099		1258
1100	void	1259	MODULE = Coro::State PACKAGE = Coro::AIO
1101	cede(...)
1102	PROTOTYPE:
1103	CODE:
1104	api_cede ();
1105		1260
1106	# and these are hacks
1107	SV *	1261	SV *
1108	_aio_get_state ()	1262	_get_state ()
1109	CODE:	1263	CODE:
1110	{	1264	{
1111	struct {	1265	struct {
1112	int errorno;	1266	int errorno;
1113	int laststype;	1267	int laststype;
…		…
1124	}	1278	}
1125	OUTPUT:	1279	OUTPUT:
1126	RETVAL	1280	RETVAL
1127		1281
1128	void	1282	void
1129	_aio_set_state (char *data_)	1283	_set_state (char *data_)
1130	PROTOTYPE: $	1284	PROTOTYPE: $
1131	CODE:	1285	CODE:
1132	{	1286	{
1133	struct {	1287	struct {
1134	int errorno;	1288	int errorno;

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