ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.87 by root, Fri Nov 24 13:40:36 2006 UTC vs.
Revision 1.157 by root, Fri Sep 21 02:01:13 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <errno.h>	75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
33		79
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	81	# undef CORO_STACKGUARD
36	#endif
37
38	#ifndef STACKGUARD
39	# define STACKGUARD 0
40	#endif
41
42	#ifdef HAVE_MMAP
43	# include <unistd.h>
44	# include <sys/mman.h>
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	82	#endif
52	# include <limits.h>	83
53	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	86	#endif
60	#endif
61		87
62	#define SUB_INIT "Coro::State::initialize"	88	/* prefer perl internal functions over our own? */
63	#define UCORO_STATE "_coro_state"	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
64		92
65	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* 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	94	* to the current C stack pointer. Its property is that it changes with each call
67	* and should be unique. */	95	* and should be unique. */
		96	#define dSTACKLEVEL int stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	97	#define STACKLEVEL ((void *)&stacklevel)
69		98
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		100
72	#define labs(l) ((l) >= 0 ? (l) : -(l))	101	#if __GNUC__ >= 3
		102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		104	#else
		105	# define attribute(x)
		106	# define BARRIER
		107	#endif
		108
		109	#define NOINLINE attribute ((noinline))
73		110
74	#include "CoroAPI.h"	111	#include "CoroAPI.h"
75		112
76	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
…		…
80	#else	117	#else
81	# define LOCK (void)0	118	# define LOCK (void)0
82	# define UNLOCK (void)0	119	# define UNLOCK (void)0
83	#endif	120	#endif
84		121
		122	/* helper storage struct for Coro::AIO */
		123	struct io_state
		124	{
		125	int errorno;
		126	I32 laststype;
		127	int laststatval;
		128	Stat_t statcache;
		129	};
		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
85	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
86	static AV *main_mainstack; /* used to differentiate between $main and others */	133	static AV *main_mainstack; /* used to differentiate between $main and others */
		134	static JMPENV *main_top_env;
87	static HV *coro_state_stash;	135	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 */	136	static SV *coro_mortal; /* will be freed after next transfer */
91		137
92	/* this is actually not only the c stack but also c registers etc... */	138	static struct coro_cctx *cctx_first;
		139	static int cctx_count, cctx_idle;
		140
		141	/* this is a structure representing a c-level coroutine */
93	typedef struct {	142	typedef struct coro_cctx {
94	int refcnt; /* pointer reference counter */	143	struct coro_cctx *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		144
		145	/* the stack */
		146	void *sptr;
		147	size_t ssize;
		148
		149	/* cpu state */
		150	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		151	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		152	JMPENV *top_env;
98	coro_context cctx;	153	coro_context cctx;
99		154
100	void *sptr;	155	#if CORO_USE_VALGRIND
101	long ssize; /* positive == mmap, otherwise malloc */	156	int valgrind_id;
102	} coro_stack;	157	#endif
		158	char inuse, mapped;
		159	} coro_cctx;
103		160
		161	enum {
		162	CF_RUNNING = 0x0001, /* coroutine is running */
		163	CF_READY = 0x0002, /* coroutine is ready */
		164	CF_NEW = 0x0004, /* has never been switched to */
		165	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		166	};
		167
		168	/* this is a structure representing a perl-level coroutine */
104	struct coro {	169	struct coro {
105	/* the optional C context */	170	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	171	coro_cctx *cctx;
107	void *cursp;
108	int gencnt;
109
110	/* optionally saved, might be zero */
111	AV *defav;
112	SV *defsv;
113	SV *errsv;
114
115	/* saved global state not related to stacks */
116	U8 dowarn;
117	I32 in_eval;
118
119	/* the stacks and related info (callchain etc..) */
120	PERL_SI *curstackinfo;
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	/* coro process data */
151	int prio;
152		172
153	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
154	AV *args;	174	AV *args;
155	int refcnt;	175	int refcnt;
		176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
		178
		179	/* optionally saved, might be zero */
		180	AV *defav; /* @_ */
		181	SV *defsv; /* $_ */
		182	SV *errsv; /* $@ */
		183	GV *deffh; /* default filehandle */
		184	SV *irssv; /* $/ */
		185	SV *irssv_sv; /* real $/ cache */
		186
		187	#define VAR(name,type) type name;
		188	# include "state.h"
		189	#undef VAR
		190
		191	/* coro process data */
		192	int prio;
		193
		194	/* linked list */
		195	struct coro *next, *prev;
		196	HV *hv; /* the perl hash associated with this coro, if any */
156	};	197	};
157		198
158	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
159	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
160		201
		202	/** Coro ********************************************************************/
		203
		204	#define PRIO_MAX 3
		205	#define PRIO_HIGH 1
		206	#define PRIO_NORMAL 0
		207	#define PRIO_LOW -1
		208	#define PRIO_IDLE -3
		209	#define PRIO_MIN -4
		210
		211	/* for Coro.pm */
		212	static SV *coro_current;
		213	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		214	static int coro_nready;
		215	static struct coro *coro_first;
		216
		217	/** lowlevel stuff **********************************************************/
		218
161	static AV *	219	static AV *
162	coro_clone_padlist (pTHX_ CV *cv)	220	coro_clone_padlist (pTHX_ CV *cv)
163	{	221	{
164	AV *padlist = CvPADLIST (cv);	222	AV *padlist = CvPADLIST (cv);
165	AV *newpadlist, *newpad;	223	AV *newpadlist, *newpad;
166		224
167	newpadlist = newAV ();	225	newpadlist = newAV ();
168	AvREAL_off (newpadlist);	226	AvREAL_off (newpadlist);
169	#if PERL_VERSION < 9	227	#if PERL_VERSION_ATLEAST (5,9,0)
		228	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		229	#else
170	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	230	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171	#else
172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173	#endif	231	#endif
174	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	232	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175	--AvFILLp (padlist);	233	--AvFILLp (padlist);
176		234
177	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	235	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
221		279
222	#define PERL_MAGIC_coro PERL_MAGIC_ext	280	#define PERL_MAGIC_coro PERL_MAGIC_ext
223		281
224	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
225		283
		284	#define CORO_MAGIC(cv) \
		285	SvMAGIC (cv) \
		286	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		287	? SvMAGIC (cv) \
		288	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		289	: 0
		290
226	/* the next two functions merely cache the padlists */	291	/* the next two functions merely cache the padlists */
227	static void	292	static void
228	get_padlist (pTHX_ CV *cv)	293	get_padlist (pTHX_ CV *cv)
229	{	294	{
230	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	295	MAGIC *mg = CORO_MAGIC (cv);
		296	AV *av;
231		297
232	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
233	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
234	else	300	else
235	{	301	{
236	#if 0	302	#if CORO_PREFER_PERL_FUNCTIONS
237	/* this should work - but it doesn't :( */	303	/* this is probably cleaner, but also slower? */
238	CV *cp = Perl_cv_clone (aTHX_ cv);	304	CV *cp = Perl_cv_clone (cv);
239	CvPADLIST (cv) = CvPADLIST (cp);	305	CvPADLIST (cv) = CvPADLIST (cp);
240	CvPADLIST (cp) = 0;	306	CvPADLIST (cp) = 0;
241	SvREFCNT_dec (cp);	307	SvREFCNT_dec (cp);
242	#else	308	#else
243	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
246	}	312	}
247		313
248	static void	314	static void
249	put_padlist (pTHX_ CV *cv)	315	put_padlist (pTHX_ CV *cv)
250	{	316	{
251	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	317	MAGIC *mg = CORO_MAGIC (cv);
		318	AV *av;
252		319
253	if (!mg)	320	if (!mg)
254	{	321	{
255	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	322	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
256	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	323	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
257	mg->mg_virtual = &vtbl_coro;	324	mg->mg_virtual = &vtbl_coro;
258	mg->mg_obj = (SV *)newAV ();	325	mg->mg_obj = (SV *)newAV ();
259	}	326	}
260		327
261	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	328	av = (AV *)mg->mg_obj;
		329
		330	if (AvFILLp (av) >= AvMAX (av))
		331	av_extend (av, AvMAX (av) + 1);
		332
		333	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
262	}	334	}
		335
		336	/** load & save, init *******************************************************/
263		337
264	#define SB do {	338	#define SB do {
265	#define SE } while (0)	339	#define SE } while (0)
266		340
267	#define LOAD(state) load_state(aTHX_ (state));
268	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
269
270	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	341	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
271		342
272	static void	343	static void
273	load_state(pTHX_ Coro__State c)	344	load_perl (pTHX_ Coro__State c)
274	{	345	{
275	PL_dowarn = c->dowarn;	346	#define VAR(name,type) PL_ ## name = c->name;
276	PL_in_eval = c->in_eval;	347	# include "state.h"
277		348	#undef VAR
278	PL_curstackinfo = c->curstackinfo;
279	PL_curstack = c->curstack;
280	PL_mainstack = c->mainstack;
281	PL_stack_sp = c->stack_sp;
282	PL_op = c->op;
283	PL_curpad = c->curpad;
284	PL_comppad = c->comppad;
285	PL_compcv = c->compcv;
286	PL_stack_base = c->stack_base;
287	PL_stack_max = c->stack_max;
288	PL_tmps_stack = c->tmps_stack;
289	PL_tmps_floor = c->tmps_floor;
290	PL_tmps_ix = c->tmps_ix;
291	PL_tmps_max = c->tmps_max;
292	PL_markstack = c->markstack;
293	PL_markstack_ptr = c->markstack_ptr;
294	PL_markstack_max = c->markstack_max;
295	PL_scopestack = c->scopestack;
296	PL_scopestack_ix = c->scopestack_ix;
297	PL_scopestack_max = c->scopestack_max;
298	PL_savestack = c->savestack;
299	PL_savestack_ix = c->savestack_ix;
300	PL_savestack_max = c->savestack_max;
301	#if PERL_VERSION < 9
302	PL_retstack = c->retstack;
303	PL_retstack_ix = c->retstack_ix;
304	PL_retstack_max = c->retstack_max;
305	#endif
306	PL_curpm = c->curpm;
307	PL_curcop = c->curcop;
308	PL_top_env = c->top_env;
309		349
310	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
311	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
312	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	352	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		353	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		354
		355	if (c->irssv)
		356	{
		357	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		358	{
		359	SvREFCNT_dec (c->irssv);
		360	c->irssv = 0;
		361	}
		362	else
		363	{
		364	REPLACE_SV (PL_rs, c->irssv);
		365	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		366	sv_setsv (c->irssv_sv, PL_rs);
		367	}
		368	}
313		369
314	{	370	{
315	dSP;	371	dSP;
316	CV *cv;	372	CV *cv;
317		373
318	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
319	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
320	{	376	{
321	AV *padlist = (AV *)POPs;
322
323	if (padlist)
324	{
325	put_padlist (aTHX_ cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
326	CvPADLIST(cv) = padlist;	378	CvDEPTH (cv) = PTR2IV (POPs);
327	}	379	CvPADLIST (cv) = (AV *)POPs;
328
329	++CvDEPTH(cv);
330	}	380	}
331		381
332	PUTBACK;	382	PUTBACK;
333	}	383	}
334	}	384	}
335		385
336	static void	386	static void
337	save_state(pTHX_ Coro__State c, int flags)	387	save_perl (pTHX_ Coro__State c)
338	{	388	{
339	{	389	{
340	dSP;	390	dSP;
341	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
342	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
…		…
345	/*	395	/*
346	* the worst thing you can imagine happens first - we have to save	396	* the worst thing you can imagine happens first - we have to save
347	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
348	*/	398	*/
349		399
350	PUSHs (Nullsv);	400	XPUSHs (Nullsv);
351	/* this loop was inspired by pp_caller */	401	/* this loop was inspired by pp_caller */
352	for (;;)	402	for (;;)
353	{	403	{
354	while (cxix >= 0)	404	while (cxix >= 0)
355	{	405	{
356	PERL_CONTEXT *cx = &ccstk[cxix--];	406	PERL_CONTEXT *cx = &ccstk[cxix--];
357		407
358	if (CxTYPE(cx) == CXt_SUB)	408	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
359	{	409	{
360	CV *cv = cx->blk_sub.cv;	410	CV *cv = cx->blk_sub.cv;
		411
361	if (CvDEPTH(cv))	412	if (CvDEPTH (cv))
362	{	413	{
363	EXTEND (SP, CvDEPTH(cv)*2);	414	EXTEND (SP, 3);
364
365	while (--CvDEPTH(cv))
366	{
367	/* this tells the restore code to increment CvDEPTH */
368	PUSHs (Nullsv);
369	PUSHs ((SV *)cv);
370	}
371
372	PUSHs ((SV *)CvPADLIST(cv));	415	PUSHs ((SV *)CvPADLIST (cv));
		416	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
373	PUSHs ((SV *)cv);	417	PUSHs ((SV *)cv);
374		418
		419	CvDEPTH (cv) = 0;
375	get_padlist (aTHX_ cv);	420	get_padlist (aTHX_ cv);
376	}	421	}
377	}	422	}
378	#ifdef CXt_FORMAT
379	else if (CxTYPE(cx) == CXt_FORMAT)
380	{
381	/* I never used formats, so how should I know how these are implemented? */
382	/* my bold guess is as a simple, plain sub... */
383	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
384	}
385	#endif
386	}	423	}
387		424
388	if (top_si->si_type == PERLSI_MAIN)	425	if (top_si->si_type == PERLSI_MAIN)
389	break;	426	break;
390		427
…		…
394	}	431	}
395		432
396	PUTBACK;	433	PUTBACK;
397	}	434	}
398		435
399	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	436	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
400	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	437	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
401	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	438	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		439	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		440	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
402		441
403	c->dowarn = PL_dowarn;	442	#define VAR(name,type)c->name = PL_ ## name;
404	c->in_eval = PL_in_eval;	443	# include "state.h"
405		444	#undef VAR
406	c->curstackinfo = PL_curstackinfo;
407	c->curstack = PL_curstack;
408	c->mainstack = PL_mainstack;
409	c->stack_sp = PL_stack_sp;
410	c->op = PL_op;
411	c->curpad = PL_curpad;
412	c->comppad = PL_comppad;
413	c->compcv = PL_compcv;
414	c->stack_base = PL_stack_base;
415	c->stack_max = PL_stack_max;
416	c->tmps_stack = PL_tmps_stack;
417	c->tmps_floor = PL_tmps_floor;
418	c->tmps_ix = PL_tmps_ix;
419	c->tmps_max = PL_tmps_max;
420	c->markstack = PL_markstack;
421	c->markstack_ptr = PL_markstack_ptr;
422	c->markstack_max = PL_markstack_max;
423	c->scopestack = PL_scopestack;
424	c->scopestack_ix = PL_scopestack_ix;
425	c->scopestack_max = PL_scopestack_max;
426	c->savestack = PL_savestack;
427	c->savestack_ix = PL_savestack_ix;
428	c->savestack_max = PL_savestack_max;
429	#if PERL_VERSION < 9
430	c->retstack = PL_retstack;
431	c->retstack_ix = PL_retstack_ix;
432	c->retstack_max = PL_retstack_max;
433	#endif
434	c->curpm = PL_curpm;
435	c->curcop = PL_curcop;
436	c->top_env = PL_top_env;
437	}	445	}
438		446
439	/*	447	/*
440	* allocate various perl stacks. This is an exact copy	448	* allocate various perl stacks. This is an exact copy
441	* of perl.c:init_stacks, except that it uses less memory	449	* of perl.c:init_stacks, except that it uses less memory
442	* on the (sometimes correct) assumption that coroutines do	450	* on the (sometimes correct) assumption that coroutines do
443	* not usually need a lot of stackspace.	451	* not usually need a lot of stackspace.
444	*/	452	*/
		453	#if CORO_PREFER_PERL_FUNCTIONS
		454	# define coro_init_stacks init_stacks
		455	#else
445	static void	456	static void
446	coro_init_stacks (pTHX)	457	coro_init_stacks (pTHX)
447	{	458	{
448	LOCK;	459	PL_curstackinfo = new_stackinfo(64, 6);
449
450	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
451	PL_curstackinfo->si_type = PERLSI_MAIN;	460	PL_curstackinfo->si_type = PERLSI_MAIN;
452	PL_curstack = PL_curstackinfo->si_stack;	461	PL_curstack = PL_curstackinfo->si_stack;
453	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	462	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454		463
455	PL_stack_base = AvARRAY(PL_curstack);	464	PL_stack_base = AvARRAY(PL_curstack);
456	PL_stack_sp = PL_stack_base;	465	PL_stack_sp = PL_stack_base;
457	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	466	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458		467
459	New(50,PL_tmps_stack,96,SV*);	468	New(50,PL_tmps_stack,64,SV*);
460	PL_tmps_floor = -1;	469	PL_tmps_floor = -1;
461	PL_tmps_ix = -1;	470	PL_tmps_ix = -1;
462	PL_tmps_max = 96;	471	PL_tmps_max = 64;
463		472
464	New(54,PL_markstack,16,I32);	473	New(54,PL_markstack,16,I32);
465	PL_markstack_ptr = PL_markstack;	474	PL_markstack_ptr = PL_markstack;
466	PL_markstack_max = PL_markstack + 16;	475	PL_markstack_max = PL_markstack + 16;
467		476
…		…
471		480
472	New(54,PL_scopestack,16,I32);	481	New(54,PL_scopestack,16,I32);
473	PL_scopestack_ix = 0;	482	PL_scopestack_ix = 0;
474	PL_scopestack_max = 16;	483	PL_scopestack_max = 16;
475		484
476	New(54,PL_savestack,96,ANY);	485	New(54,PL_savestack,64,ANY);
477	PL_savestack_ix = 0;	486	PL_savestack_ix = 0;
478	PL_savestack_max = 96;	487	PL_savestack_max = 64;
479		488
480	#if PERL_VERSION < 9	489	#if !PERL_VERSION_ATLEAST (5,9,0)
481	New(54,PL_retstack,8,OP*);	490	New(54,PL_retstack,4,OP*);
482	PL_retstack_ix = 0;	491	PL_retstack_ix = 0;
483	PL_retstack_max = 8;	492	PL_retstack_max = 4;
484	#endif	493	#endif
485
486	UNLOCK;
487	}	494	}
		495	#endif
488		496
489	/*	497	/*
490	* destroy the stacks, the callchain etc...	498	* destroy the stacks, the callchain etc...
491	*/	499	*/
492	static void	500	static void
493	destroy_stacks(pTHX)	501	coro_destroy_stacks (pTHX)
494	{	502	{
495	if (!IN_DESTRUCT)	503	if (!IN_DESTRUCT)
496	{	504	{
497	/* is this ugly, I ask? */	505	/* restore all saved variables and stuff */
498	LEAVE_SCOPE (0);	506	LEAVE_SCOPE (0);
		507	assert (PL_tmps_floor == -1);
499		508
500	/* sure it is, but more important: is it correct?? :/ */	509	/* free all temporaries */
501	FREETMPS;	510	FREETMPS;
		511	assert (PL_tmps_ix == -1);
502		512
		513	/* unwind all extra stacks */
503	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	514	POPSTACK_TO (PL_mainstack);
		515
		516	/* unwind main stack */
		517	dounwind (-1);
504	}	518	}
505		519
506	while (PL_curstackinfo->si_next)	520	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;	521	PL_curstackinfo = PL_curstackinfo->si_next;
508		522
509	while (PL_curstackinfo)	523	while (PL_curstackinfo)
510	{	524	{
511	PERL_SI *p = PL_curstackinfo->si_prev;	525	PERL_SI *p = PL_curstackinfo->si_prev;
512		526
513	{ /*D*//*remove*/
514	dSP;
515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516	PUTBACK; /* possibly superfluous */
517	}
518
519	if (!IN_DESTRUCT)	527	if (!IN_DESTRUCT)
520	{
521	dounwind (-1);/*D*//*remove*/
522	SvREFCNT_dec (PL_curstackinfo->si_stack);	528	SvREFCNT_dec (PL_curstackinfo->si_stack);
523	}
524		529
525	Safefree (PL_curstackinfo->si_cxstack);	530	Safefree (PL_curstackinfo->si_cxstack);
526	Safefree (PL_curstackinfo);	531	Safefree (PL_curstackinfo);
527	PL_curstackinfo = p;	532	PL_curstackinfo = p;
528	}	533	}
529		534
530	Safefree (PL_tmps_stack);	535	Safefree (PL_tmps_stack);
531	Safefree (PL_markstack);	536	Safefree (PL_markstack);
532	Safefree (PL_scopestack);	537	Safefree (PL_scopestack);
533	Safefree (PL_savestack);	538	Safefree (PL_savestack);
534	#if PERL_VERSION < 9	539	#if !PERL_VERSION_ATLEAST (5,9,0)
535	Safefree (PL_retstack);	540	Safefree (PL_retstack);
536	#endif	541	#endif
537	}	542	}
538		543
539	static void	544	static size_t
540	allocate_stack (Coro__State ctx, int alloc)	545	coro_rss (struct coro *coro)
541	{	546	{
542	coro_stack *stack;	547	size_t rss = sizeof (coro);
543		548
544	New (0, stack, 1, coro_stack);	549	if (coro->mainstack)
545
546	stack->refcnt = 1;
547	stack->usecnt = 1;
548	stack->gencnt = ctx->gencnt = 0;
549
550	if (alloc)
551	{	550	{
552	#if HAVE_MMAP	551	if (coro->flags & CF_RUNNING)
553	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
554	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
555	if (stack->sptr != (void *)-1)
556	{	552	{
557	# if STACKGUARD	553	#define VAR(name,type)coro->name = PL_ ## name;
558	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	554	# include "state.h"
559	# endif	555	#undef VAR
560	}	556	}
561	else
562	#endif
563	{
564	stack->ssize = - (STACKSIZE * (long)sizeof (long));
565	New (0, stack->sptr, STACKSIZE, long);
566	}
567	}
568	else
569	stack->sptr = 0;
570		557
571	ctx->stack = stack;	558	rss += sizeof (coro->curstackinfo);
572	}	559	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		560	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		561	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		562	rss += coro->tmps_max * sizeof (SV *);
		563	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		564	rss += coro->scopestack_max * sizeof (I32);
		565	rss += coro->savestack_max * sizeof (ANY);
573		566
574	static void	567	#if !PERL_VERSION_ATLEAST (5,9,0)
575	deallocate_stack (Coro__State ctx)	568	rss += coro->retstack_max * sizeof (OP *);
576	{	569	#endif
577	coro_stack *stack = ctx->stack;
578
579	ctx->stack = 0;
580
581	if (stack)
582	{	570	}
583	if (!--stack->refcnt)
584	{
585	#ifdef HAVE_MMAP
586	if (stack->ssize > 0 && stack->sptr)
587	munmap (stack->sptr, stack->ssize);
588	else
589	#endif
590	Safefree (stack->sptr);
591		571
592	Safefree (stack);	572	return rss;
593	}
594	else if (ctx->gencnt == stack->gencnt)
595	--stack->usecnt;
596	}
597	}	573	}
598		574
		575	/** coroutine stack handling ************************************************/
		576
599	static void	577	static void
600	setup_coro (void *arg)	578	setup_coro (pTHX_ struct coro *coro)
601	{	579	{
602	/*	580	/*
603	* emulate part of the perl startup here.	581	* emulate part of the perl startup here.
604	*/	582	*/
		583	coro_init_stacks (aTHX);
		584
		585	PL_curcop = &PL_compiling;
		586	PL_in_eval = EVAL_NULL;
		587	PL_comppad = 0;
		588	PL_curpm = 0;
		589	PL_localizing = 0;
		590	PL_dirty = 0;
		591	PL_restartop = 0;
		592
		593	{
		594	dSP;
		595	LOGOP myop;
		596
		597	SvREFCNT_dec (GvAV (PL_defgv));
		598	GvAV (PL_defgv) = coro->args; coro->args = 0;
		599
		600	Zero (&myop, 1, LOGOP);
		601	myop.op_next = Nullop;
		602	myop.op_flags = OPf_WANT_VOID;
		603
		604	PUSHMARK (SP);
		605	XPUSHs (av_shift (GvAV (PL_defgv)));
		606	PUTBACK;
		607	PL_op = (OP *)&myop;
		608	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		609	SPAGAIN;
		610	}
		611
		612	ENTER; /* necessary e.g. for dounwind */
		613	}
		614
		615	static void
		616	free_coro_mortal (pTHX)
		617	{
		618	if (coro_mortal)
		619	{
		620	SvREFCNT_dec (coro_mortal);
		621	coro_mortal = 0;
		622	}
		623	}
		624
		625	/* inject a fake call to Coro::State::_cctx_init into the execution */
		626	/* _cctx_init should be careful, as it could be called at almost any time */
		627	/* during execution of a perl program */
		628	static void NOINLINE
		629	prepare_cctx (pTHX_ coro_cctx *cctx)
		630	{
		631	dSP;
		632	LOGOP myop;
		633
		634	Zero (&myop, 1, LOGOP);
		635	myop.op_next = PL_op;
		636	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		637
		638	PUSHMARK (SP);
		639	EXTEND (SP, 2);
		640	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		641	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		642	PUTBACK;
		643	PL_op = (OP *)&myop;
		644	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		645	SPAGAIN;
		646	}
		647
		648	/*
		649	* this is a _very_ stripped down perl interpreter ;)
		650	*/
		651	static void
		652	coro_run (void *arg)
		653	{
605	dTHX;	654	dTHX;
606	dSP;
607	Coro__State ctx = (Coro__State)arg;
608	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
609		655
610	coro_init_stacks (aTHX);	656	/* coro_run is the alternative tail of transfer(), so unlock here. */
611	/*PL_curcop = 0;*/	657	UNLOCK;
612	/*PL_in_eval = PL_in_eval;*/ /* inherit */
613	SvREFCNT_dec (GvAV (PL_defgv));
614	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
615		658
616	SPAGAIN;	659	PL_top_env = &PL_start_env;
617		660
618	if (ctx->stack)	661	/* inject a fake subroutine call to cctx_init */
619	{	662	prepare_cctx (aTHX_ (coro_cctx *)arg);
620	ctx->cursp = 0;
621		663
622	PUSHMARK(SP);	664	/* somebody or something will hit me for both perl_run and PL_restartop */
623	PUTBACK;	665	PL_restartop = PL_op;
624	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	666	perl_run (PL_curinterp);
625		667
626	if (SvTRUE (ERRSV))	668	/*
627	croak (NULL);	669	* If perl-run returns we assume exit() was being called or the coro
628	else	670	* fell off the end, which seems to be the only valid (non-bug)
629	croak ("FATAL: CCTXT coroutine returned!");	671	* reason for perl_run to return. We try to exit by jumping to the
		672	* bootstrap-time "top" top_env, as we cannot restore the "main"
		673	* coroutine as Coro has no such concept
		674	*/
		675	PL_top_env = main_top_env;
		676	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		677	}
		678
		679	static coro_cctx *
		680	cctx_new ()
		681	{
		682	coro_cctx *cctx;
		683	void *stack_start;
		684	size_t stack_size;
		685
		686	++cctx_count;
		687
		688	Newz (0, cctx, 1, coro_cctx);
		689
		690	#if HAVE_MMAP
		691
		692	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		693	/* mmap supposedly does allocate-on-write for us */
		694	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		695
		696	if (cctx->sptr != (void *)-1)
		697	{
		698	# if CORO_STACKGUARD
		699	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		700	# endif
		701	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		702	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		703	cctx->mapped = 1;
630	}	704	}
631	else	705	else
632	{	706	#endif
633	UNOP myop;
634
635	Zero(&myop, 1, UNOP);
636	myop.op_next = Nullop;
637	myop.op_flags = OPf_WANT_VOID;
638
639	PL_op = (OP *)&myop;
640
641	PUSHMARK(SP);
642	XPUSHs (sub_init);
643	/*
644	* the next line is slightly wrong, as PL_op->op_next
645	* is actually being executed so we skip the first op.
646	* that doesn't matter, though, since it is only
647	* pp_nextstate and we never return...
648	* ah yes, and I don't care anyways ;)
649	*/
650	PUTBACK;
651	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
652	SPAGAIN;
653
654	ENTER; /* necessary e.g. for dounwind */
655	}	707	{
656	}	708	cctx->ssize = coro_stacksize * (long)sizeof (long);
		709	New (0, cctx->sptr, coro_stacksize, long);
657		710
658	static void	711	if (!cctx->sptr)
659	continue_coro (void *arg)	712	{
660	{	713	perror ("FATAL: unable to allocate stack for coroutine");
661	/*	714	_exit (EXIT_FAILURE);
662	* this is a _very_ stripped down perl interpreter ;)	715	}
663	*/
664	dTHX;
665	Coro__State ctx = (Coro__State)arg;
666		716
667	PL_top_env = &PL_start_env;	717	stack_start = cctx->sptr;
		718	stack_size = cctx->ssize;
		719	}
668		720
669	ctx->cursp = 0;	721	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		722	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		723
		724	return cctx;
		725	}
		726
		727	static void
		728	cctx_destroy (coro_cctx *cctx)
		729	{
		730	if (!cctx)
		731	return;
		732
		733	--cctx_count;
		734
		735	#if CORO_USE_VALGRIND
		736	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		737	#endif
		738
		739	#if HAVE_MMAP
		740	if (cctx->mapped)
		741	munmap (cctx->sptr, cctx->ssize);
		742	else
		743	#endif
		744	Safefree (cctx->sptr);
		745
		746	Safefree (cctx);
		747	}
		748
		749	static coro_cctx *
		750	cctx_get (pTHX)
		751	{
		752	while (cctx_first)
		753	{
		754	coro_cctx *cctx = cctx_first;
		755	cctx_first = cctx->next;
		756	--cctx_idle;
		757
		758	if (cctx->ssize >= coro_stacksize)
		759	return cctx;
		760
		761	cctx_destroy (cctx);
		762	}
		763
670	PL_op = PL_op->op_next;	764	PL_op = PL_op->op_next;
671	CALLRUNOPS(aTHX);	765	return cctx_new ();
672
673	abort ();
674	}	766	}
		767
		768	static void
		769	cctx_put (coro_cctx *cctx)
		770	{
		771	/* free another cctx if overlimit */
		772	if (cctx_idle >= MAX_IDLE_CCTX)
		773	{
		774	coro_cctx *first = cctx_first;
		775	cctx_first = first->next;
		776	--cctx_idle;
		777
		778	assert (!first->inuse);
		779	cctx_destroy (first);
		780	}
		781
		782	++cctx_idle;
		783	cctx->next = cctx_first;
		784	cctx_first = cctx;
		785	}
		786
		787	/** coroutine switching *****************************************************/
675		788
676	/* never call directly, always through the coro_state_transfer global variable */	789	/* never call directly, always through the coro_state_transfer global variable */
677	static void	790	static void NOINLINE
678	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	791	transfer (pTHX_ struct coro *prev, struct coro *next)
679	{	792	{
680	dSTACKLEVEL;	793	dSTACKLEVEL;
681		794
		795	/* sometimes transfer is only called to set idle_sp */
		796	if (!next)
		797	{
		798	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		799	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		800	}
682	if (prev != next)	801	else if (prev != next)
683	{	802	{
684	/* has this coro been created yet? */	803	coro_cctx *prev__cctx;
685	if (next->mainstack)	804
		805	if (prev->flags & CF_NEW)
686	{	806	{
687	LOCK;	807	/* create a new empty context */
688	SAVE (prev, flags);	808	Newz (0, prev->cctx, 1, coro_cctx);
689	LOAD (next);	809	prev->cctx->inuse = 1;
690	UNLOCK;	810	prev->flags &= ~CF_NEW;
691		811	prev->flags |= CF_RUNNING;
692	/* mark this state as in-use */
693	next->mainstack = 0;
694	next->tmps_ix = -2;
695
696	/* stacklevel changed? if yes, grab the stack for us! */
697	if (flags & TRANSFER_SAVE_CCTXT)
698	{
699	if (!prev->stack)
700	allocate_stack (prev, 0);
701	else if (prev->cursp != stacklevel
702	&& prev->stack->usecnt > 1)
703	{
704	prev->gencnt = ++prev->stack->gencnt;
705	prev->stack->usecnt = 1;
706	}
707
708	/* has our stack been invalidated? */
709	if (next->stack && next->stack->gencnt != next->gencnt)
710	{
711	deallocate_stack (next);
712	allocate_stack (next, 1);
713	coro_create (&(next->stack->cctx),
714	continue_coro, (void *)next,
715	next->stack->sptr, labs (next->stack->ssize));
716	}
717
718	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
719	prev->cursp = stacklevel;
720	/* don't add any code here */
721	}
722	else
723	next->cursp = stacklevel;
724	}	812	}
725	else if (next->tmps_ix == -2)	813
726	croak ("tried to transfer to running coroutine");	814	/*TODO: must not croak here */
		815	if (!prev->flags & CF_RUNNING)
		816	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		817
		818	if (next->flags & CF_RUNNING)
		819	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		820
		821	if (next->flags & CF_DESTROYED)
		822	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		823
		824	prev->flags &= ~CF_RUNNING;
		825	next->flags |= CF_RUNNING;
		826
		827	LOCK;
		828
		829	if (next->flags & CF_NEW)
		830	{
		831	/* need to start coroutine */
		832	next->flags &= ~CF_NEW;
		833	/* first get rid of the old state */
		834	save_perl (aTHX_ prev);
		835	/* setup coroutine call */
		836	setup_coro (aTHX_ next);
		837	/* need a new stack */
		838	assert (!next->cctx);
		839	}
727	else	840	else
728	{	841	{
729	LOCK;	842	/* coroutine already started */
730	SAVE (prev, -1); /* first get rid of the old state */	843	save_perl (aTHX_ prev);
731	UNLOCK;	844	load_perl (aTHX_ next);
732
733	/* create the coroutine for the first time */
734	if (flags & TRANSFER_SAVE_CCTXT)
735	{
736	if (!prev->stack)
737	allocate_stack (prev, 0);
738
739	/* the new coroutine starts with start_env again */
740	PL_top_env = &PL_start_env;
741
742	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
743	{
744	setup_coro (next);
745	next->cursp = stacklevel;
746
747	prev->stack->refcnt++;
748	prev->stack->usecnt++;
749	next->stack = prev->stack;
750	next->gencnt = prev->gencnt;
751	}
752	else
753	{
754	assert (!next->stack);
755	allocate_stack (next, 1);
756	coro_create (&(next->stack->cctx),
757	setup_coro, (void *)next,
758	next->stack->sptr, labs (next->stack->ssize));
759	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
760	prev->cursp = stacklevel;
761	/* don't add any code here */
762	}
763	}
764	else
765	{
766	setup_coro (next);
767	next->cursp = stacklevel;
768	}
769	}	845	}
770	}
771		846
772	LOCK;	847	prev__cctx = prev->cctx;
773	if (coro_mortal)	848
774	{	849	/* possibly "free" the cctx */
775	SvREFCNT_dec (coro_mortal);	850	if (prev__cctx->idle_sp == STACKLEVEL)
776	coro_mortal = 0;	851	{
777	}	852	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		853	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		854
		855	prev->cctx = 0;
		856
		857	cctx_put (prev__cctx);
		858	prev__cctx->inuse = 0;
		859	}
		860
		861	if (!next->cctx)
		862	{
		863	next->cctx = cctx_get (aTHX);
		864	assert (!next->cctx->inuse);
		865	next->cctx->inuse = 1;
		866	}
		867
		868	if (prev__cctx != next->cctx)
		869	{
		870	prev__cctx->top_env = PL_top_env;
		871	PL_top_env = next->cctx->top_env;
		872	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		873	}
		874
		875	free_coro_mortal (aTHX);
778	UNLOCK;	876	UNLOCK;
		877	}
779	}	878	}
780		879
781	/* use this function pointer to call the above function */	880	struct transfer_args
782	/* this is done to increase chances of the compiler not inlining the call */	881	{
783	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	882	struct coro *prev, *next;
		883	};
784		884
785	#define SV_CORO(sv,func) \	885	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
786	do { \
787	if (SvROK (sv)) \
788	sv = SvRV (sv); \
789	\
790	if (SvTYPE (sv) == SVt_PVHV && SvSTASH (sv) != coro_state_stash) \
791	{ \
792	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
793	\
794	if (!he) \
795	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
796	\
797	(sv) = SvRV (HeVAL(he)); \
798	} \
799	\
800	/* must also be changed inside Coro::Cont::yield */ \
801	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
802	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
803	\
804	} while(0)
805		886
		887	/** high level stuff ********************************************************/
		888
806	static void	889	static int
807	coro_state_destroy (struct coro *coro)	890	coro_state_destroy (pTHX_ struct coro *coro)
808	{	891	{
809	if (coro->refcnt--)	892	if (coro->flags & CF_DESTROYED)
810	return;	893	return 0;
		894
		895	coro->flags |= CF_DESTROYED;
		896
		897	if (coro->flags & CF_READY)
		898	{
		899	/* reduce nready, as destroying a ready coro effectively unreadies it */
		900	/* alternative: look through all ready queues and remove the coro */
		901	LOCK;
		902	--coro_nready;
		903	UNLOCK;
		904	}
		905	else
		906	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
811		907
812	if (coro->mainstack && coro->mainstack != main_mainstack)	908	if (coro->mainstack && coro->mainstack != main_mainstack)
813	{	909	{
814	struct coro temp;	910	struct coro temp;
815		911
816	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	912	assert (!(coro->flags & CF_RUNNING));
		913
		914	Zero (&temp, 1, struct coro);
		915	temp.save = CORO_SAVE_ALL;
		916
		917	if (coro->flags & CF_RUNNING)
		918	croak ("FATAL: tried to destroy currently running coroutine");
		919
		920	save_perl (aTHX_ &temp);
817	LOAD (aTHX_ coro);	921	load_perl (aTHX_ coro);
818		922
819	destroy_stacks (aTHX);	923	coro_destroy_stacks (aTHX);
820		924
821	LOAD ((&temp)); /* this will get rid of defsv etc.. */	925	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
822		926
823	coro->mainstack = 0;	927	coro->mainstack = 0;
824	}	928	}
825		929
826	deallocate_stack (coro);	930	cctx_destroy (coro->cctx);
827	SvREFCNT_dec (coro->args);	931	SvREFCNT_dec (coro->args);
828	Safefree (coro);	932
		933	if (coro->next) coro->next->prev = coro->prev;
		934	if (coro->prev) coro->prev->next = coro->next;
		935	if (coro == coro_first) coro_first = coro->next;
		936
		937	return 1;
829	}	938	}
830		939
831	static int	940	static int
832	coro_state_clear (SV *sv, MAGIC *mg)	941	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
833	{	942	{
834	struct coro *coro = (struct coro *)mg->mg_ptr;	943	struct coro *coro = (struct coro *)mg->mg_ptr;
835	mg->mg_ptr = 0;	944	mg->mg_ptr = 0;
836		945
		946	coro->hv = 0;
		947
		948	if (--coro->refcnt < 0)
		949	{
837	coro_state_destroy (coro);	950	coro_state_destroy (aTHX_ coro);
		951	Safefree (coro);
		952	}
838		953
839	return 0;	954	return 0;
840	}	955	}
841		956
842	static int	957	static int
843	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	958	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
844	{	959	{
845	struct coro *coro = (struct coro *)mg->mg_ptr;	960	struct coro *coro = (struct coro *)mg->mg_ptr;
846		961
847	++coro->refcnt;	962	++coro->refcnt;
848		963
849	return 0;	964	return 0;
850	}	965	}
851		966
852	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	967	static MGVTBL coro_state_vtbl = {
		968	0, 0, 0, 0,
		969	coro_state_free,
		970	0,
		971	#ifdef MGf_DUP
		972	coro_state_dup,
		973	#else
		974	# define MGf_DUP 0
		975	#endif
		976	};
853		977
854	static struct coro *	978	static struct coro *
855	SvSTATE (SV *coro)	979	SvSTATE_ (pTHX_ SV *coro)
856	{	980	{
857	MAGIC *mg = SvMAGIC (SvROK (coro) ? SvRV (coro) : coro);	981	HV *stash;
858	assert (mg->mg_type == PERL_MAGIC_ext);	982	MAGIC *mg;
		983
		984	if (SvROK (coro))
		985	coro = SvRV (coro);
		986
		987	stash = SvSTASH (coro);
		988	if (stash != coro_stash && stash != coro_state_stash)
		989	{
		990	/* very slow, but rare, check */
		991	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		992	croak ("Coro::State object required");
		993	}
		994
		995	mg = CORO_MAGIC (coro);
859	return (struct coro *)mg->mg_ptr;	996	return (struct coro *)mg->mg_ptr;
860	}	997	}
861		998
		999	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1000
862	static void	1001	static void
		1002	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1003	{
		1004	ta->prev = SvSTATE (prev_sv);
		1005	ta->next = SvSTATE (next_sv);
		1006	}
		1007
		1008	static void
863	api_transfer (pTHX_ SV *prev, SV *next, int flags)	1009	api_transfer (SV *prev_sv, SV *next_sv)
864	{	1010	{
865	SV_CORO (prev, "Coro::transfer");	1011	dTHX;
866	SV_CORO (next, "Coro::transfer");	1012	struct transfer_args ta;
867		1013
868	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1014	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1015	TRANSFER (ta);
		1016	}
		1017
		1018	static int
		1019	api_save (SV *coro_sv, int new_save)
		1020	{
		1021	dTHX;
		1022	struct coro *coro = SvSTATE (coro_sv);
		1023	int old_save = coro->save;
		1024
		1025	if (new_save >= 0)
		1026	coro->save = new_save;
		1027
		1028	return old_save;
869	}	1029	}
870		1030
871	/** Coro ********************************************************************/	1031	/** Coro ********************************************************************/
872		1032
873	#define PRIO_MAX 3
874	#define PRIO_HIGH 1
875	#define PRIO_NORMAL 0
876	#define PRIO_LOW -1
877	#define PRIO_IDLE -3
878	#define PRIO_MIN -4
879
880	/* for Coro.pm */
881	static GV *coro_current, *coro_idle;
882	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
883	static int coro_nready;
884
885	static void	1033	static void
886	coro_enq (pTHX_ SV *sv)	1034	coro_enq (pTHX_ SV *coro_sv)
887	{	1035	{
888	int prio;
889
890	if (SvTYPE (sv) != SVt_PVHV)
891	croak ("Coro::ready tried to enqueue something that is not a coroutine");
892
893	{
894	SV *coro = sv;
895	SV_CORO (coro, "omg");
896	prio = SvSTATE (coro)->prio;
897	}
898
899	av_push (coro_ready [prio - PRIO_MIN], sv);	1036	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
900	coro_nready++;
901	}	1037	}
902		1038
903	static SV *	1039	static SV *
904	coro_deq (pTHX_ int min_prio)	1040	coro_deq (pTHX_ int min_prio)
905	{	1041	{
…		…
909	if (min_prio < 0)	1045	if (min_prio < 0)
910	min_prio = 0;	1046	min_prio = 0;
911		1047
912	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1048	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
913	if (AvFILLp (coro_ready [prio]) >= 0)	1049	if (AvFILLp (coro_ready [prio]) >= 0)
914	{
915	coro_nready--;
916	return av_shift (coro_ready [prio]);	1050	return av_shift (coro_ready [prio]);
917	}
918		1051
919	return 0;	1052	return 0;
920	}	1053	}
921		1054
922	static void	1055	static int
923	api_ready (SV *coro)	1056	api_ready (SV *coro_sv)
924	{	1057	{
925	dTHX;	1058	dTHX;
		1059	struct coro *coro;
926		1060
927	if (SvROK (coro))	1061	if (SvROK (coro_sv))
928	coro = SvRV (coro);	1062	coro_sv = SvRV (coro_sv);
		1063
		1064	coro = SvSTATE (coro_sv);
		1065
		1066	if (coro->flags & CF_READY)
		1067	return 0;
		1068
		1069	coro->flags |= CF_READY;
929		1070
930	LOCK;	1071	LOCK;
931	coro_enq (aTHX_ SvREFCNT_inc (coro));	1072	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1073	++coro_nready;
932	UNLOCK;	1074	UNLOCK;
		1075
		1076	return 1;
		1077	}
		1078
		1079	static int
		1080	api_is_ready (SV *coro_sv)
		1081	{
		1082	dTHX;
		1083	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1084	}
		1085
		1086	static void
		1087	prepare_schedule (pTHX_ struct transfer_args *ta)
		1088	{
		1089	SV *prev_sv, *next_sv;
		1090
		1091	for (;;)
		1092	{
		1093	LOCK;
		1094	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1095
		1096	/* nothing to schedule: call the idle handler */
		1097	if (!next_sv)
		1098	{
		1099	dSP;
		1100	UNLOCK;
		1101
		1102	ENTER;
		1103	SAVETMPS;
		1104
		1105	PUSHMARK (SP);
		1106	PUTBACK;
		1107	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1108
		1109	FREETMPS;
		1110	LEAVE;
		1111	continue;
		1112	}
		1113
		1114	ta->next = SvSTATE (next_sv);
		1115
		1116	/* cannot transfer to destroyed coros, skip and look for next */
		1117	if (ta->next->flags & CF_DESTROYED)
		1118	{
		1119	UNLOCK;
		1120	SvREFCNT_dec (next_sv);
		1121	/* coro_nready is already taken care of by destroy */
		1122	continue;
		1123	}
		1124
		1125	--coro_nready;
		1126	UNLOCK;
		1127	break;
		1128	}
		1129
		1130	/* free this only after the transfer */
		1131	prev_sv = SvRV (coro_current);
		1132	SvRV_set (coro_current, next_sv);
		1133	ta->prev = SvSTATE (prev_sv);
		1134
		1135	assert (ta->next->flags & CF_READY);
		1136	ta->next->flags &= ~CF_READY;
		1137
		1138	LOCK;
		1139	free_coro_mortal (aTHX);
		1140	coro_mortal = prev_sv;
		1141	UNLOCK;
		1142	}
		1143
		1144	static void
		1145	prepare_cede (pTHX_ struct transfer_args *ta)
		1146	{
		1147	api_ready (coro_current);
		1148	prepare_schedule (aTHX_ ta);
		1149	}
		1150
		1151	static int
		1152	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1153	{
		1154	if (coro_nready)
		1155	{
		1156	SV *prev = SvRV (coro_current);
		1157	prepare_schedule (aTHX_ ta);
		1158	api_ready (prev);
		1159	return 1;
		1160	}
		1161	else
		1162	return 0;
933	}	1163	}
934		1164
935	static void	1165	static void
936	api_schedule (void)	1166	api_schedule (void)
937	{	1167	{
938	dTHX;	1168	dTHX;
		1169	struct transfer_args ta;
939		1170
940	SV *prev, *next;	1171	prepare_schedule (aTHX_ &ta);
941		1172	TRANSFER (ta);
942	LOCK;
943
944	prev = SvRV (GvSV (coro_current));
945	next = coro_deq (aTHX_ PRIO_MIN);
946
947	if (!next)
948	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
949
950	/* free this only after the transfer */
951	coro_mortal = prev;
952	SV_CORO (prev, "Coro::schedule");
953
954	SvRV (GvSV (coro_current)) = next;
955
956	SV_CORO (next, "Coro::schedule");
957
958	UNLOCK;
959
960	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
961	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
962	}	1173	}
963		1174
964	static void	1175	static int
965	api_cede (void)	1176	api_cede (void)
966	{	1177	{
967	dTHX;	1178	dTHX;
		1179	struct transfer_args ta;
968		1180
969	LOCK;	1181	prepare_cede (aTHX_ &ta);
970	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
971	UNLOCK;
972		1182
973	api_schedule ();	1183	if (ta.prev != ta.next)
		1184	{
		1185	TRANSFER (ta);
		1186	return 1;
		1187	}
		1188	else
		1189	return 0;
		1190	}
		1191
		1192	static int
		1193	api_cede_notself (void)
		1194	{
		1195	dTHX;
		1196	struct transfer_args ta;
		1197
		1198	if (prepare_cede_notself (aTHX_ &ta))
		1199	{
		1200	TRANSFER (ta);
		1201	return 1;
		1202	}
		1203	else
		1204	return 0;
974	}	1205	}
975		1206
976	MODULE = Coro::State PACKAGE = Coro::State	1207	MODULE = Coro::State PACKAGE = Coro::State
977		1208
978	PROTOTYPES: DISABLE	1209	PROTOTYPES: DISABLE
979		1210
980	BOOT:	1211	BOOT:
981	{ /* {} necessary for stoopid perl-5.6.x */	1212	{
982	#ifdef USE_ITHREADS	1213	#ifdef USE_ITHREADS
983	MUTEX_INIT (&coro_mutex);	1214	MUTEX_INIT (&coro_mutex);
984	#endif	1215	#endif
985	BOOT_PAGESIZE;	1216	BOOT_PAGESIZE;
986		1217
987	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
988	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
989	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1218	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
990		1219
991	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1220	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
992	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1221	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
993	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1222	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1223	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1224	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
994	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1225	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1226	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
995		1227
996	main_mainstack = PL_mainstack;	1228	main_mainstack = PL_mainstack;
		1229	main_top_env = PL_top_env;
		1230
		1231	while (main_top_env->je_prev)
		1232	main_top_env = main_top_env->je_prev;
997		1233
998	coroapi.ver = CORO_API_VERSION;	1234	coroapi.ver = CORO_API_VERSION;
999	coroapi.transfer = api_transfer;	1235	coroapi.transfer = api_transfer;
1000		1236
1001	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1237	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1009	HV *hv;	1245	HV *hv;
1010	int i;	1246	int i;
1011		1247
1012	Newz (0, coro, 1, struct coro);	1248	Newz (0, coro, 1, struct coro);
1013	coro->args = newAV ();	1249	coro->args = newAV ();
		1250	coro->save = CORO_SAVE_DEF;
		1251	coro->flags = CF_NEW;
		1252
		1253	if (coro_first) coro_first->prev = coro;
		1254	coro->next = coro_first;
		1255	coro_first = coro;
		1256
		1257	coro->hv = hv = newHV ();
		1258	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1259	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1014		1260
1015	for (i = 1; i < items; i++)	1261	for (i = 1; i < items; i++)
1016	av_push (coro->args, newSVsv (ST (i)));	1262	av_push (coro->args, newSVsv (ST (i)));
1017
1018	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1019	/*coro->stack = 0;*/
1020
1021	hv = newHV ();
1022	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1023	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1024	}	1263	}
1025	OUTPUT:	1264	OUTPUT:
1026	RETVAL	1265	RETVAL
1027		1266
		1267	int
		1268	save (SV *coro, int new_save = -1)
		1269	CODE:
		1270	RETVAL = api_save (coro, new_save);
		1271	OUTPUT:
		1272	RETVAL
		1273
		1274	int
		1275	save_also (SV *coro_sv, int save_also)
		1276	CODE:
		1277	{
		1278	struct coro *coro = SvSTATE (coro_sv);
		1279	RETVAL = coro->save;
		1280	coro->save |= save_also;
		1281	}
		1282	OUTPUT:
		1283	RETVAL
		1284
1028	void	1285	void
1029	transfer(prev, next, flags)	1286	_set_stacklevel (...)
1030	SV *prev	1287	ALIAS:
1031	SV *next	1288	Coro::State::transfer = 1
1032	int flags	1289	Coro::schedule = 2
		1290	Coro::cede = 3
		1291	Coro::cede_notself = 4
1033	CODE:	1292	CODE:
1034	PUTBACK;
1035	SV_CORO (next, "Coro::transfer");
1036	SV_CORO (prev, "Coro::transfer");
1037	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
1038	SPAGAIN;
1039
1040	int
1041	prio (Coro::State coro, int newprio = 0)
1042	ALIAS:
1043	nice = 1
1044	CODE:
1045	{	1293	{
1046	RETVAL = coro->prio;	1294	struct transfer_args ta;
1047		1295
1048	if (items > 1)	1296	switch (ix)
1049	{	1297	{
		1298	case 0:
		1299	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1300	ta.next = 0;
		1301	break;
		1302
		1303	case 1:
1050	if (ix)	1304	if (items != 2)
1051	newprio += coro->prio;	1305	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1052		1306
1053	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1307	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1054	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1308	break;
1055		1309
1056	coro->prio = newprio;	1310	case 2:
		1311	prepare_schedule (aTHX_ &ta);
		1312	break;
		1313
		1314	case 3:
		1315	prepare_cede (aTHX_ &ta);
		1316	break;
		1317
		1318	case 4:
		1319	if (!prepare_cede_notself (aTHX_ &ta))
		1320	XSRETURN_EMPTY;
		1321
		1322	break;
1057	}	1323	}
1058	}
1059		1324
1060	void	1325	BARRIER;
1061	_clone_state_from (SV *dst, SV *src)	1326	TRANSFER (ta);
		1327
		1328	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1329	XSRETURN_YES;
		1330	}
		1331
		1332	bool
		1333	_destroy (SV *coro_sv)
1062	CODE:	1334	CODE:
1063	{	1335	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1064	struct coro *coro_src = SvSTATE (src);	1336	OUTPUT:
1065		1337	RETVAL
1066	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1067
1068	++coro_src->refcnt;
1069	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1070	}
1071		1338
1072	void	1339	void
1073	_exit (code)	1340	_exit (code)
1074	int code	1341	int code
1075	PROTOTYPE: $	1342	PROTOTYPE: $
1076	CODE:	1343	CODE:
1077	_exit (code);	1344	_exit (code);
1078		1345
1079	MODULE = Coro::State PACKAGE = Coro::Cont	1346	int
		1347	cctx_stacksize (int new_stacksize = 0)
		1348	CODE:
		1349	RETVAL = coro_stacksize;
		1350	if (new_stacksize)
		1351	coro_stacksize = new_stacksize;
		1352	OUTPUT:
		1353	RETVAL
		1354
		1355	int
		1356	cctx_count ()
		1357	CODE:
		1358	RETVAL = cctx_count;
		1359	OUTPUT:
		1360	RETVAL
		1361
		1362	int
		1363	cctx_idle ()
		1364	CODE:
		1365	RETVAL = cctx_idle;
		1366	OUTPUT:
		1367	RETVAL
1080		1368
1081	void	1369	void
1082	yield (...)	1370	list ()
1083	PROTOTYPE: @	1371	PPCODE:
		1372	{
		1373	struct coro *coro;
		1374	for (coro = coro_first; coro; coro = coro->next)
		1375	if (coro->hv)
		1376	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1377	}
		1378
		1379	void
		1380	_eval (Coro::State coro, SV *coderef)
		1381	CODE:
		1382	{
		1383	if (coro->mainstack)
		1384	{
		1385	struct coro temp;
		1386	Zero (&temp, 1, struct coro);
		1387	temp.save = CORO_SAVE_ALL;
		1388
		1389	if (!(coro->flags & CF_RUNNING))
		1390	{
		1391	save_perl (aTHX_ &temp);
		1392	load_perl (aTHX_ coro);
		1393	}
		1394
		1395	{
		1396	dSP;
		1397	ENTER;
		1398	SAVETMPS;
		1399	PUSHMARK (SP);
		1400	PUTBACK;
		1401	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1402	SPAGAIN;
		1403	FREETMPS;
		1404	LEAVE;
		1405	PUTBACK;
		1406	}
		1407
		1408	if (!(coro->flags & CF_RUNNING))
		1409	{
		1410	save_perl (aTHX_ coro);
		1411	load_perl (aTHX_ &temp);
		1412	}
		1413	}
		1414	}
		1415
		1416	SV *
		1417	is_ready (Coro::State coro)
		1418	PROTOTYPE: $
		1419	ALIAS:
		1420	is_ready = CF_READY
		1421	is_running = CF_RUNNING
		1422	is_new = CF_NEW
		1423	is_destroyed = CF_DESTROYED
		1424	CODE:
		1425	RETVAL = boolSV (coro->flags & ix);
		1426	OUTPUT:
		1427	RETVAL
		1428
		1429	IV
		1430	rss (Coro::State coro)
		1431	PROTOTYPE: $
1084	CODE:	1432	CODE:
1085	SV *yieldstack;	1433	RETVAL = coro_rss (coro);
1086	SV *sv;	1434	OUTPUT:
1087	AV *defav = GvAV (PL_defgv);	1435	RETVAL
1088	struct coro *prev, *next;
1089		1436
1090	yieldstack = *hv_fetch (
1091	(HV *)SvRV (GvSV (coro_current)),
1092	"yieldstack", sizeof ("yieldstack") - 1,
1093	0
1094	);
1095
1096	/* set up @_ -- ugly */
1097	av_clear (defav);
1098	av_fill (defav, items - 1);
1099	while (items--)
1100	av_store (defav, items, SvREFCNT_inc (ST(items)));
1101
1102	sv = av_pop ((AV *)SvRV (yieldstack));
1103	prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1104	next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1105	SvREFCNT_dec (sv);
1106
1107	coro_state_transfer (aTHX_ prev, next, 0);
1108		1437
1109	MODULE = Coro::State PACKAGE = Coro	1438	MODULE = Coro::State PACKAGE = Coro
1110		1439
1111	BOOT:	1440	BOOT:
1112	{	1441	{
1113	int i;	1442	int i;
		1443
1114	HV *stash = gv_stashpv ("Coro", TRUE);	1444	coro_stash = gv_stashpv ("Coro", TRUE);
1115		1445
1116	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1446	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1117	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1447	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1118	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1448	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1119	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1449	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1120	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1450	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1121	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1451	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1122		1452
1123	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1453	coro_current = get_sv ("Coro::current", FALSE);
1124	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1454	SvREADONLY_on (coro_current);
1125		1455
1126	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1456	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1127	coro_ready[i] = newAV ();	1457	coro_ready[i] = newAV ();
1128		1458
1129	{	1459	{
1130	SV *sv = perl_get_sv("Coro::API", 1);	1460	SV *sv = perl_get_sv("Coro::API", 1);
1131		1461
1132	coroapi.schedule = api_schedule;	1462	coroapi.schedule = api_schedule;
		1463	coroapi.save = api_save;
1133	coroapi.cede = api_cede;	1464	coroapi.cede = api_cede;
		1465	coroapi.cede_notself = api_cede_notself;
1134	coroapi.ready = api_ready;	1466	coroapi.ready = api_ready;
		1467	coroapi.is_ready = api_is_ready;
1135	coroapi.nready = &coro_nready;	1468	coroapi.nready = &coro_nready;
1136	coroapi.current = coro_current;	1469	coroapi.current = coro_current;
1137		1470
1138	GCoroAPI = &coroapi;	1471	GCoroAPI = &coroapi;
1139	sv_setiv (sv, (IV)&coroapi);	1472	sv_setiv (sv, (IV)&coroapi);
1140	SvREADONLY_on (sv);	1473	SvREADONLY_on (sv);
1141	}	1474	}
1142	}	1475	}
1143		1476
1144	#if !PERL_MICRO
1145
1146	void	1477	void
1147	ready (self)	1478	_set_current (SV *current)
1148	SV * self
1149	PROTOTYPE: $	1479	PROTOTYPE: $
1150	CODE:	1480	CODE:
1151	api_ready (self);	1481	SvREFCNT_dec (SvRV (coro_current));
		1482	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1152		1483
1153	#endif	1484	int
		1485	prio (Coro::State coro, int newprio = 0)
		1486	ALIAS:
		1487	nice = 1
		1488	CODE:
		1489	{
		1490	RETVAL = coro->prio;
		1491
		1492	if (items > 1)
		1493	{
		1494	if (ix)
		1495	newprio = coro->prio - newprio;
		1496
		1497	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1498	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1499
		1500	coro->prio = newprio;
		1501	}
		1502	}
		1503	OUTPUT:
		1504	RETVAL
		1505
		1506	SV *
		1507	ready (SV *self)
		1508	PROTOTYPE: $
		1509	CODE:
		1510	RETVAL = boolSV (api_ready (self));
		1511	OUTPUT:
		1512	RETVAL
1154		1513
1155	int	1514	int
1156	nready (...)	1515	nready (...)
1157	PROTOTYPE:	1516	PROTOTYPE:
1158	CODE:	1517	CODE:
1159	RETVAL = coro_nready;	1518	RETVAL = coro_nready;
1160	OUTPUT:	1519	OUTPUT:
1161	RETVAL	1520	RETVAL
1162		1521
1163	void	1522	MODULE = Coro::State PACKAGE = Coro::AIO
1164	schedule (...)	1523
1165	PROTOTYPE:	1524	SV *
		1525	_get_state ()
1166	CODE:	1526	CODE:
1167	api_schedule ();
1168
1169	void
1170	cede (...)
1171	PROTOTYPE:
1172	CODE:
1173	api_cede ();
1174
1175	# and these are hacks
1176	SV *
1177	_aio_get_state ()
1178	CODE:
1179	{	1527	{
1180	struct {	1528	struct io_state *data;
1181	int errorno;
1182	int laststype;
1183	int laststatval;
1184	Stat_t statcache;
1185	} data;
1186		1529
		1530	RETVAL = newSV (sizeof (struct io_state));
		1531	data = (struct io_state *)SvPVX (RETVAL);
		1532	SvCUR_set (RETVAL, sizeof (struct io_state));
		1533	SvPOK_only (RETVAL);
		1534
1187	data.errorno = errno;	1535	data->errorno = errno;
1188	data.laststype = PL_laststype;	1536	data->laststype = PL_laststype;
1189	data.laststatval = PL_laststatval;	1537	data->laststatval = PL_laststatval;
1190	data.statcache = PL_statcache;	1538	data->statcache = PL_statcache;
1191
1192	RETVAL = newSVpvn ((char *)&data, sizeof data);
1193	}	1539	}
1194	OUTPUT:	1540	OUTPUT:
1195	RETVAL	1541	RETVAL
1196		1542
1197	void	1543	void
1198	_aio_set_state (char *data_)	1544	_set_state (char *data_)
1199	PROTOTYPE: $	1545	PROTOTYPE: $
1200	CODE:	1546	CODE:
1201	{	1547	{
1202	struct {	1548	struct io_state *data = (void *)data_;
1203	int errorno;
1204	int laststype;
1205	int laststatval;
1206	Stat_t statcache;
1207	} *data = (void *)data_;
1208		1549
1209	errno = data->errorno;	1550	errno = data->errorno;
1210	PL_laststype = data->laststype;	1551	PL_laststype = data->laststype;
1211	PL_laststatval = data->laststatval;	1552	PL_laststatval = data->laststatval;
1212	PL_statcache = data->statcache;	1553	PL_statcache = data->statcache;
1213	}	1554	}
		1555

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines