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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.98 by root, Sun Nov 26 21:25:53 2006 UTC vs.
Revision 1.154 by root, Fri Sep 21 01:08:06 2007 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
7	#include "patchlevel.h"	9	#include "patchlevel.h"
8		10
9	#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)
10	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
11	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
12	# endif	57	# endif
13	# ifndef call_sv	58	# ifndef call_sv
14	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
25	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
26	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
27	# endif	72	# endif
28	#endif	73	#endif
29		74
30	#include <stdio.h>	75	/* 5.8.7 */
31	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
32		79
33	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
34	# undef STACKGUARD	81	# undef CORO_STACKGUARD
35	#endif
36
37	#ifndef STACKGUARD
38	# define STACKGUARD 0
39	#endif
40
41	#ifdef HAVE_MMAP
42	# include <unistd.h>
43	# include <sys/mman.h>
44	# ifndef MAP_ANONYMOUS
45	# ifdef MAP_ANON
46	# define MAP_ANONYMOUS MAP_ANON
47	# else
48	# undef HAVE_MMAP
49	# endif
50	# endif	82	#endif
51	# include <limits.h>	83
52	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
53	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
54	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
55	static long pagesize;
56	# else
57	# define BOOT_PAGESIZE
58	# endif	86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
59	#endif	91	#endif
60		92
61	/* 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
62	* 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
63	* and should be unique. */	95	* and should be unique. */
64	#define dSTACKLEVEL int stacklevel	96	#define dSTACKLEVEL int stacklevel
65	#define STACKLEVEL ((void *)&stacklevel)	97	#define STACKLEVEL ((void *)&stacklevel)
66		98
67	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
68		100
		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))
		110
69	#include "CoroAPI.h"	111	#include "CoroAPI.h"
70
71	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
72		112
73	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
74	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
75	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
76	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
77	#else	117	#else
78	# define LOCK (void)0	118	# define LOCK (void)0
79	# define UNLOCK (void)0	119	# define UNLOCK (void)0
80	#endif	120	#endif
81		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;
82	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
83	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;
84	static HV *coro_state_stash, *coro_stash;	135	static HV *coro_state_stash, *coro_stash;
85	static SV *coro_mortal; /* will be freed after next transfer */	136	static SV *coro_mortal; /* will be freed after next transfer */
86		137
		138	static struct coro_cctx *cctx_first;
		139	static int cctx_count, cctx_idle;
		140
87	/* this is a structure representing a c-level coroutine */	141	/* this is a structure representing a c-level coroutine */
88	typedef struct coro_stack {	142	typedef struct coro_cctx {
89	struct coro_stack *next;	143	struct coro_cctx *next;
90		144
91	/* the stack */	145	/* the stack */
92	void *sptr;	146	void *sptr;
93	long ssize; /* positive == mmap, otherwise malloc */	147	size_t ssize;
94		148
95	/* cpu state */	149	/* cpu state */
96	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	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 */
97	JMPENV *top_env;	152	JMPENV *top_env;
98	coro_context cctx;	153	coro_context cctx;
99	} coro_stack;	154
		155	#if CORO_USE_VALGRIND
		156	int valgrind_id;
		157	#endif
		158	char inuse, mapped;
		159	} coro_cctx;
		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	};
100		167
101	/* this is a structure representing a perl-level coroutine */	168	/* this is a structure representing a perl-level coroutine */
102	struct coro {	169	struct coro {
103	/* the c coroutine allocated to this perl coroutine, if any */	170	/* the c coroutine allocated to this perl coroutine, if any */
104	coro_stack *stack;	171	coro_cctx *cctx;
105		172
106	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
107	AV *args;	174	AV *args;
108	int refcnt;	175	int refcnt;
		176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
109		178
110	/* optionally saved, might be zero */	179	/* optionally saved, might be zero */
111	AV *defav;	180	AV *defav; /* @_ */
112	SV *defsv;	181	SV *defsv; /* $_ */
113	SV *errsv;	182	SV *errsv; /* $@ */
		183	GV *deffh; /* default filehandle */
		184	SV *irssv; /* $/ */
		185	SV *irssv_sv; /* real $/ cache */
114		186
115	/* saved global state not related to stacks */	187	#define VAR(name,type) type name;
116	U8 dowarn;	188	# include "state.h"
117	I32 in_eval;	189	#undef VAR
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		190
149	/* coro process data */	191	/* coro process data */
150	int prio;	192	int prio;
		193
		194	/* linked list */
		195	struct coro *next, *prev;
		196	HV *hv; /* the perl hash associated with this coro, if any */
151	};	197	};
152		198
153	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
154	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
155		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
156	static AV *	219	static AV *
157	coro_clone_padlist (CV *cv)	220	coro_clone_padlist (pTHX_ CV *cv)
158	{	221	{
159	AV *padlist = CvPADLIST (cv);	222	AV *padlist = CvPADLIST (cv);
160	AV *newpadlist, *newpad;	223	AV *newpadlist, *newpad;
161		224
162	newpadlist = newAV ();	225	newpadlist = newAV ();
163	AvREAL_off (newpadlist);	226	AvREAL_off (newpadlist);
164	#if PERL_VERSION < 9	227	#if PERL_VERSION_ATLEAST (5,9,0)
		228	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		229	#else
165	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	230	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
166	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
168	#endif	231	#endif
169	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	232	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
170	--AvFILLp (padlist);	233	--AvFILLp (padlist);
171		234
172	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	235	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
174		237
175	return newpadlist;	238	return newpadlist;
176	}	239	}
177		240
178	static void	241	static void
179	free_padlist (AV *padlist)	242	free_padlist (pTHX_ AV *padlist)
180	{	243	{
181	/* may be during global destruction */	244	/* may be during global destruction */
182	if (SvREFCNT (padlist))	245	if (SvREFCNT (padlist))
183	{	246	{
184	I32 i = AvFILLp (padlist);	247	I32 i = AvFILLp (padlist);
…		…
205	AV *padlist;	268	AV *padlist;
206	AV *av = (AV *)mg->mg_obj;	269	AV *av = (AV *)mg->mg_obj;
207		270
208	/* casting is fun. */	271	/* casting is fun. */
209	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
210	free_padlist (padlist);	273	free_padlist (aTHX_ padlist);
211		274
212	SvREFCNT_dec (av);	275	SvREFCNT_dec (av);
213		276
214	return 0;	277	return 0;
215	}	278	}
216		279
217	#define PERL_MAGIC_coro PERL_MAGIC_ext	280	#define PERL_MAGIC_coro PERL_MAGIC_ext
218		281
219	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
220		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
221	/* the next two functions merely cache the padlists */	291	/* the next two functions merely cache the padlists */
222	static void	292	static void
223	get_padlist (CV *cv)	293	get_padlist (pTHX_ CV *cv)
224	{	294	{
225	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	295	MAGIC *mg = CORO_MAGIC (cv);
		296	AV *av;
226		297
227	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
228	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
229	else	300	else
230	{	301	{
231	#if 0	302	#if CORO_PREFER_PERL_FUNCTIONS
232	/* this is probably cleaner, but also slower? */	303	/* this is probably cleaner, but also slower? */
233	CV *cp = Perl_cv_clone (cv);	304	CV *cp = Perl_cv_clone (cv);
234	CvPADLIST (cv) = CvPADLIST (cp);	305	CvPADLIST (cv) = CvPADLIST (cp);
235	CvPADLIST (cp) = 0;	306	CvPADLIST (cp) = 0;
236	SvREFCNT_dec (cp);	307	SvREFCNT_dec (cp);
237	#else	308	#else
238	CvPADLIST (cv) = coro_clone_padlist (cv);	309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
239	#endif	310	#endif
240	}	311	}
241	}	312	}
242		313
243	static void	314	static void
244	put_padlist (CV *cv)	315	put_padlist (pTHX_ CV *cv)
245	{	316	{
246	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	317	MAGIC *mg = CORO_MAGIC (cv);
		318	AV *av;
247		319
248	if (!mg)	320	if (!mg)
249	{	321	{
250	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	322	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
251	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	323	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
252	mg->mg_virtual = &vtbl_coro;	324	mg->mg_virtual = &vtbl_coro;
253	mg->mg_obj = (SV *)newAV ();	325	mg->mg_obj = (SV *)newAV ();
254	}	326	}
255		327
256	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);
257	}	334	}
		335
		336	/** load & save, init *******************************************************/
258		337
259	#define SB do {	338	#define SB do {
260	#define SE } while (0)	339	#define SE } while (0)
261		340
262	#define LOAD(state) load_state((state));
263	#define SAVE(state,flags) save_state((state),(flags));
264
265	#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
266		342
267	static void	343	static void
268	load_state(Coro__State c)	344	load_perl (pTHX_ Coro__State c)
269	{	345	{
270	PL_dowarn = c->dowarn;	346	#define VAR(name,type) PL_ ## name = c->name;
271	PL_in_eval = c->in_eval;	347	# include "state.h"
272		348	#undef VAR
273	PL_curstackinfo = c->curstackinfo;
274	PL_curstack = c->curstack;
275	PL_mainstack = c->mainstack;
276	PL_stack_sp = c->stack_sp;
277	PL_op = c->op;
278	PL_curpad = c->curpad;
279	PL_comppad = c->comppad;
280	PL_compcv = c->compcv;
281	PL_stack_base = c->stack_base;
282	PL_stack_max = c->stack_max;
283	PL_tmps_stack = c->tmps_stack;
284	PL_tmps_floor = c->tmps_floor;
285	PL_tmps_ix = c->tmps_ix;
286	PL_tmps_max = c->tmps_max;
287	PL_markstack = c->markstack;
288	PL_markstack_ptr = c->markstack_ptr;
289	PL_markstack_max = c->markstack_max;
290	PL_scopestack = c->scopestack;
291	PL_scopestack_ix = c->scopestack_ix;
292	PL_scopestack_max = c->scopestack_max;
293	PL_savestack = c->savestack;
294	PL_savestack_ix = c->savestack_ix;
295	PL_savestack_max = c->savestack_max;
296	#if PERL_VERSION < 9
297	PL_retstack = c->retstack;
298	PL_retstack_ix = c->retstack_ix;
299	PL_retstack_max = c->retstack_max;
300	#endif
301	PL_curpm = c->curpm;
302	PL_curcop = c->curcop;
303		349
304	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
305	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
306	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	}
307		369
308	{	370	{
309	dSP;	371	dSP;
310	CV *cv;	372	CV *cv;
311		373
312	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
313	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
314	{	376	{
315	AV *padlist = (AV *)POPs;
316
317	if (padlist)
318	{
319	put_padlist (cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
320	CvPADLIST(cv) = padlist;	378	CvDEPTH (cv) = PTR2IV (POPs);
321	}	379	CvPADLIST (cv) = (AV *)POPs;
322
323	++CvDEPTH(cv);
324	}	380	}
325		381
326	PUTBACK;	382	PUTBACK;
327	}	383	}
328	}	384	}
329		385
330	static void	386	static void
331	save_state(Coro__State c, int flags)	387	save_perl (pTHX_ Coro__State c)
332	{	388	{
333	{	389	{
334	dSP;	390	dSP;
335	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
336	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
…		…
339	/*	395	/*
340	* 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
341	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
342	*/	398	*/
343		399
		400	EXTEND (SP, 3 + 1);
344	PUSHs (Nullsv);	401	PUSHs (Nullsv);
345	/* this loop was inspired by pp_caller */	402	/* this loop was inspired by pp_caller */
346	for (;;)	403	for (;;)
347	{	404	{
348	while (cxix >= 0)	405	while (cxix >= 0)
349	{	406	{
350	PERL_CONTEXT *cx = &ccstk[cxix--];	407	PERL_CONTEXT *cx = &ccstk[cxix--];
351		408
352	if (CxTYPE(cx) == CXt_SUB)	409	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
353	{	410	{
354	CV *cv = cx->blk_sub.cv;	411	CV *cv = cx->blk_sub.cv;
		412
355	if (CvDEPTH(cv))	413	if (CvDEPTH (cv))
356	{	414	{
357	EXTEND (SP, CvDEPTH(cv)*2);	415	EXTEND (SP, 3);
358
359	while (--CvDEPTH(cv))
360	{
361	/* this tells the restore code to increment CvDEPTH */
362	PUSHs (Nullsv);
363	PUSHs ((SV *)cv);
364	}
365
366	PUSHs ((SV *)CvPADLIST(cv));	416	PUSHs ((SV *)CvPADLIST (cv));
		417	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
367	PUSHs ((SV *)cv);	418	PUSHs ((SV *)cv);
368		419
		420	CvDEPTH (cv) = 0;
369	get_padlist (cv);	421	get_padlist (aTHX_ cv);
370	}	422	}
371	}	423	}
372	#ifdef CXt_FORMAT
373	else if (CxTYPE(cx) == CXt_FORMAT)
374	{
375	/* I never used formats, so how should I know how these are implemented? */
376	/* my bold guess is as a simple, plain sub... */
377	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
378	}
379	#endif
380	}	424	}
381		425
382	if (top_si->si_type == PERLSI_MAIN)	426	if (top_si->si_type == PERLSI_MAIN)
383	break;	427	break;
384		428
…		…
388	}	432	}
389		433
390	PUTBACK;	434	PUTBACK;
391	}	435	}
392		436
393	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	437	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
394	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	438	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
395	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	439	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		440	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		441	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
396		442
397	c->dowarn = PL_dowarn;	443	#define VAR(name,type)c->name = PL_ ## name;
398	c->in_eval = PL_in_eval;	444	# include "state.h"
399		445	#undef VAR
400	c->curstackinfo = PL_curstackinfo;
401	c->curstack = PL_curstack;
402	c->mainstack = PL_mainstack;
403	c->stack_sp = PL_stack_sp;
404	c->op = PL_op;
405	c->curpad = PL_curpad;
406	c->comppad = PL_comppad;
407	c->compcv = PL_compcv;
408	c->stack_base = PL_stack_base;
409	c->stack_max = PL_stack_max;
410	c->tmps_stack = PL_tmps_stack;
411	c->tmps_floor = PL_tmps_floor;
412	c->tmps_ix = PL_tmps_ix;
413	c->tmps_max = PL_tmps_max;
414	c->markstack = PL_markstack;
415	c->markstack_ptr = PL_markstack_ptr;
416	c->markstack_max = PL_markstack_max;
417	c->scopestack = PL_scopestack;
418	c->scopestack_ix = PL_scopestack_ix;
419	c->scopestack_max = PL_scopestack_max;
420	c->savestack = PL_savestack;
421	c->savestack_ix = PL_savestack_ix;
422	c->savestack_max = PL_savestack_max;
423	#if PERL_VERSION < 9
424	c->retstack = PL_retstack;
425	c->retstack_ix = PL_retstack_ix;
426	c->retstack_max = PL_retstack_max;
427	#endif
428	c->curpm = PL_curpm;
429	c->curcop = PL_curcop;
430	}	446	}
431		447
432	/*	448	/*
433	* allocate various perl stacks. This is an exact copy	449	* allocate various perl stacks. This is an exact copy
434	* of perl.c:init_stacks, except that it uses less memory	450	* of perl.c:init_stacks, except that it uses less memory
435	* on the (sometimes correct) assumption that coroutines do	451	* on the (sometimes correct) assumption that coroutines do
436	* not usually need a lot of stackspace.	452	* not usually need a lot of stackspace.
437	*/	453	*/
		454	#if CORO_PREFER_PERL_FUNCTIONS
		455	# define coro_init_stacks init_stacks
		456	#else
438	static void	457	static void
439	coro_init_stacks ()	458	coro_init_stacks (pTHX)
440	{	459	{
441	LOCK;	460	PL_curstackinfo = new_stackinfo(64, 4);
442
443	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
444	PL_curstackinfo->si_type = PERLSI_MAIN;	461	PL_curstackinfo->si_type = PERLSI_MAIN;
445	PL_curstack = PL_curstackinfo->si_stack;	462	PL_curstack = PL_curstackinfo->si_stack;
446	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	463	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
447		464
448	PL_stack_base = AvARRAY(PL_curstack);	465	PL_stack_base = AvARRAY(PL_curstack);
449	PL_stack_sp = PL_stack_base;	466	PL_stack_sp = PL_stack_base;
450	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	467	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
451		468
452	New(50,PL_tmps_stack,96,SV*);	469	New(50,PL_tmps_stack,64,SV*);
453	PL_tmps_floor = -1;	470	PL_tmps_floor = -1;
454	PL_tmps_ix = -1;	471	PL_tmps_ix = -1;
455	PL_tmps_max = 96;	472	PL_tmps_max = 64;
456		473
457	New(54,PL_markstack,16,I32);	474	New(54,PL_markstack,16,I32);
458	PL_markstack_ptr = PL_markstack;	475	PL_markstack_ptr = PL_markstack;
459	PL_markstack_max = PL_markstack + 16;	476	PL_markstack_max = PL_markstack + 16;
460		477
…		…
464		481
465	New(54,PL_scopestack,16,I32);	482	New(54,PL_scopestack,16,I32);
466	PL_scopestack_ix = 0;	483	PL_scopestack_ix = 0;
467	PL_scopestack_max = 16;	484	PL_scopestack_max = 16;
468		485
469	New(54,PL_savestack,96,ANY);	486	New(54,PL_savestack,32,ANY);
470	PL_savestack_ix = 0;	487	PL_savestack_ix = 0;
471	PL_savestack_max = 96;	488	PL_savestack_max = 32;
472		489
473	#if PERL_VERSION < 9	490	#if !PERL_VERSION_ATLEAST (5,9,0)
474	New(54,PL_retstack,8,OP*);	491	New(54,PL_retstack,8,OP*);
475	PL_retstack_ix = 0;	492	PL_retstack_ix = 0;
476	PL_retstack_max = 8;	493	PL_retstack_max = 8;
477	#endif	494	#endif
478
479	UNLOCK;
480	}	495	}
		496	#endif
481		497
482	/*	498	/*
483	* destroy the stacks, the callchain etc...	499	* destroy the stacks, the callchain etc...
484	*/	500	*/
485	static void	501	static void
486	destroy_stacks()	502	coro_destroy_stacks (pTHX)
487	{	503	{
488	if (!IN_DESTRUCT)	504	if (!IN_DESTRUCT)
489	{	505	{
490	/* is this ugly, I ask? */	506	/* restore all saved variables and stuff */
491	LEAVE_SCOPE (0);	507	LEAVE_SCOPE (0);
		508	assert (PL_tmps_floor == -1);
492		509
493	/* sure it is, but more important: is it correct?? :/ */	510	/* free all temporaries */
494	FREETMPS;	511	FREETMPS;
		512	assert (PL_tmps_ix == -1);
495		513
		514	/* unwind all extra stacks */
496	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	515	POPSTACK_TO (PL_mainstack);
		516
		517	/* unwind main stack */
		518	dounwind (-1);
497	}	519	}
498		520
499	while (PL_curstackinfo->si_next)	521	while (PL_curstackinfo->si_next)
500	PL_curstackinfo = PL_curstackinfo->si_next;	522	PL_curstackinfo = PL_curstackinfo->si_next;
501		523
502	while (PL_curstackinfo)	524	while (PL_curstackinfo)
503	{	525	{
504	PERL_SI *p = PL_curstackinfo->si_prev;	526	PERL_SI *p = PL_curstackinfo->si_prev;
505		527
506	{ /*D*//*remove*/
507	dSP;
508	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
509	PUTBACK; /* possibly superfluous */
510	}
511
512	if (!IN_DESTRUCT)	528	if (!IN_DESTRUCT)
513	{
514	dounwind (-1);/*D*//*remove*/
515	SvREFCNT_dec (PL_curstackinfo->si_stack);	529	SvREFCNT_dec (PL_curstackinfo->si_stack);
516	}
517		530
518	Safefree (PL_curstackinfo->si_cxstack);	531	Safefree (PL_curstackinfo->si_cxstack);
519	Safefree (PL_curstackinfo);	532	Safefree (PL_curstackinfo);
520	PL_curstackinfo = p;	533	PL_curstackinfo = p;
521	}	534	}
522		535
523	Safefree (PL_tmps_stack);	536	Safefree (PL_tmps_stack);
524	Safefree (PL_markstack);	537	Safefree (PL_markstack);
525	Safefree (PL_scopestack);	538	Safefree (PL_scopestack);
526	Safefree (PL_savestack);	539	Safefree (PL_savestack);
527	#if PERL_VERSION < 9	540	#if !PERL_VERSION_ATLEAST (5,9,0)
528	Safefree (PL_retstack);	541	Safefree (PL_retstack);
529	#endif	542	#endif
530	}	543	}
531		544
		545	static size_t
		546	coro_rss (struct coro *coro)
		547	{
		548	size_t rss = sizeof (coro);
		549
		550	if (coro->mainstack)
		551	{
		552	if (coro->flags & CF_RUNNING)
		553	{
		554	#define VAR(name,type)coro->name = PL_ ## name;
		555	# include "state.h"
		556	#undef VAR
		557	}
		558
		559	rss += sizeof (coro->curstackinfo);
		560	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		561	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		562	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		563	rss += coro->tmps_max * sizeof (SV *);
		564	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		565	rss += coro->scopestack_max * sizeof (I32);
		566	rss += coro->savestack_max * sizeof (ANY);
		567
		568	#if !PERL_VERSION_ATLEAST (5,9,0)
		569	rss += coro->retstack_max * sizeof (OP *);
		570	#endif
		571	}
		572
		573	return rss;
		574	}
		575
		576	/** coroutine stack handling ************************************************/
		577
532	static void	578	static void
533	setup_coro (struct coro *coro)	579	setup_coro (pTHX_ struct coro *coro)
534	{	580	{
535	/*	581	/*
536	* emulate part of the perl startup here.	582	* emulate part of the perl startup here.
537	*/	583	*/
538	dTHX;	584	coro_init_stacks (aTHX);
		585
		586	PL_curcop = &PL_compiling;
		587	PL_in_eval = EVAL_NULL;
		588	PL_comppad = 0;
		589	PL_curpm = 0;
		590	PL_localizing = 0;
		591	PL_dirty = 0;
		592	PL_restartop = 0;
		593
		594	{
		595	dSP;
		596	LOGOP myop;
		597
		598	SvREFCNT_dec (GvAV (PL_defgv));
		599	GvAV (PL_defgv) = coro->args; coro->args = 0;
		600
		601	Zero (&myop, 1, LOGOP);
		602	myop.op_next = Nullop;
		603	myop.op_flags = OPf_WANT_VOID;
		604
		605	PUSHMARK (SP);
		606	XPUSHs (av_shift (GvAV (PL_defgv)));
		607	PUTBACK;
		608	PL_op = (OP *)&myop;
		609	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		610	SPAGAIN;
		611	}
		612
		613	ENTER; /* necessary e.g. for dounwind */
		614	}
		615
		616	static void
		617	free_coro_mortal (pTHX)
		618	{
		619	if (coro_mortal)
		620	{
		621	SvREFCNT_dec (coro_mortal);
		622	coro_mortal = 0;
		623	}
		624	}
		625
		626	/* inject a fake call to Coro::State::_cctx_init into the execution */
		627	/* _cctx_init should be careful, as it could be called at almost any time */
		628	/* during execution of a perl program */
		629	static void NOINLINE
		630	prepare_cctx (pTHX_ coro_cctx *cctx)
		631	{
539	dSP;	632	dSP;
540	UNOP myop;	633	LOGOP myop;
541	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
542		634
543	coro_init_stacks ();
544	/*PL_curcop = 0;*/
545	/*PL_in_eval = PL_in_eval;*/ /* inherit */
546	SvREFCNT_dec (GvAV (PL_defgv));
547	GvAV (PL_defgv) = coro->args; coro->args = 0;
548
549	SPAGAIN;
550
551	Zero (&myop, 1, UNOP);	635	Zero (&myop, 1, LOGOP);
552	myop.op_next = Nullop;	636	myop.op_next = PL_op;
553	myop.op_flags = OPf_WANT_VOID;	637	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
554		638
		639	PUSHMARK (SP);
		640	EXTEND (SP, 2);
		641	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		642	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		643	PUTBACK;
555	PL_op = (OP *)&myop;	644	PL_op = (OP *)&myop;
556
557	PUSHMARK(SP);
558	XPUSHs (sub_init);
559	PUTBACK;
560	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	645	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
561	SPAGAIN;	646	SPAGAIN;
562
563	ENTER; /* necessary e.g. for dounwind */
564	}	647	}
565		648
566	static void	649	/*
567	free_coro_mortal ()	650	* this is a _very_ stripped down perl interpreter ;)
568	{	651	*/
569	if (coro_mortal)
570	{
571	SvREFCNT_dec (coro_mortal);
572	coro_mortal = 0;
573	}
574	}
575
576	static void	652	static void
577	coro_run (void *arg)	653	coro_run (void *arg)
578	{	654	{
		655	dTHX;
		656
		657	/* coro_run is the alternative tail of transfer(), so unlock here. */
		658	UNLOCK;
		659
		660	PL_top_env = &PL_start_env;
		661
		662	/* inject a fake subroutine call to cctx_init */
		663	prepare_cctx (aTHX_ (coro_cctx *)arg);
		664
		665	/* somebody or something will hit me for both perl_run and PL_restartop */
		666	PL_restartop = PL_op;
		667	perl_run (PL_curinterp);
		668
579	/*	669	/*
580	* this is a _very_ stripped down perl interpreter ;)	670	* If perl-run returns we assume exit() was being called or the coro
		671	* fell off the end, which seems to be the only valid (non-bug)
		672	* reason for perl_run to return. We try to exit by jumping to the
		673	* bootstrap-time "top" top_env, as we cannot restore the "main"
		674	* coroutine as Coro has no such concept
581	*/	675	*/
582	dTHX;
583	int ret;
584
585	UNLOCK;
586
587	PL_top_env = &PL_start_env;	676	PL_top_env = main_top_env;
588		677	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
589	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
590	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
591
592	/* continue at cctx_init, without entersub */
593	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
594
595	/* somebody will hit me for both perl_run and PL_restartop */
596	ret = perl_run (PERL_GET_CONTEXT);
597	printf ("ret %d\n", ret);//D
598
599	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
600	abort ();
601	}	678	}
602		679
603	static coro_stack *	680	static coro_cctx *
604	stack_new ()	681	cctx_new ()
605	{	682	{
606	coro_stack *stack;	683	coro_cctx *cctx;
		684	void *stack_start;
		685	size_t stack_size;
607		686
		687	++cctx_count;
		688
608	New (0, stack, 1, coro_stack);	689	Newz (0, cctx, 1, coro_cctx);
609		690
610	#if HAVE_MMAP	691	#if HAVE_MMAP
611		692
612	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	693	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
613	/* mmap suppsedly does allocate-on-write for us */	694	/* mmap supposedly does allocate-on-write for us */
614	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	695	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
615		696
616	if (stack->sptr == (void *)-1)	697	if (cctx->sptr != (void *)-1)
617	{
618	perror ("FATAL: unable to mmap stack for coroutine");
619	_exit (EXIT_FAILURE);
620	}	698	{
621
622	# if STACKGUARD	699	# if CORO_STACKGUARD
623	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	700	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
624	# endif	701	# endif
625		702	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
626	#else	703	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
627		704	cctx->mapped = 1;
628	stack->ssize = STACKSIZE * (long)sizeof (long);
629	New (0, stack->sptr, STACKSIZE, long);
630
631	if (!stack->sptr)
632	{	705	}
		706	else
		707	#endif
		708	{
		709	cctx->ssize = coro_stacksize * (long)sizeof (long);
		710	New (0, cctx->sptr, coro_stacksize, long);
		711
		712	if (!cctx->sptr)
		713	{
633	perror (stderr, "FATAL: unable to malloc stack for coroutine");	714	perror ("FATAL: unable to allocate stack for coroutine");
634	_exit (EXIT_FAILURE);	715	_exit (EXIT_FAILURE);
635	}	716	}
636		717
637	#endif	718	stack_start = cctx->sptr;
		719	stack_size = cctx->ssize;
		720	}
638		721
		722	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
639	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	723	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
640		724
641	return stack;	725	return cctx;
642	}	726	}
643		727
644	static void	728	static void
645	stack_free (coro_stack *stack)	729	cctx_destroy (coro_cctx *cctx)
646	{	730	{
647	if (!stack)	731	if (!cctx)
648	return;	732	return;
649		733
		734	--cctx_count;
		735
		736	#if CORO_USE_VALGRIND
		737	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		738	#endif
		739
650	#if HAVE_MMAP	740	#if HAVE_MMAP
		741	if (cctx->mapped)
651	munmap (stack->sptr, stack->ssize);	742	munmap (cctx->sptr, cctx->ssize);
652	#else
653	Safefree (stack->sptr);
654	#endif
655
656	Safefree (stack);
657	}
658
659	static coro_stack *stack_first;
660
661	static coro_stack *
662	stack_get ()
663	{
664	coro_stack *stack;
665
666	if (stack_first)
667	{
668	stack = stack_first;
669	stack_first = stack->next;
670	}
671	else	743	else
		744	#endif
		745	Safefree (cctx->sptr);
		746
		747	Safefree (cctx);
		748	}
		749
		750	static coro_cctx *
		751	cctx_get (pTHX)
		752	{
		753	while (cctx_first)
672	{	754	{
673	stack = stack_new ();	755	coro_cctx *cctx = cctx_first;
		756	cctx_first = cctx->next;
		757	--cctx_idle;
		758
		759	if (cctx->ssize >= coro_stacksize)
		760	return cctx;
		761
		762	cctx_destroy (cctx);
		763	}
		764
674	PL_op = PL_op->op_next;	765	PL_op = PL_op->op_next;
		766	return cctx_new ();
		767	}
		768
		769	static void
		770	cctx_put (coro_cctx *cctx)
		771	{
		772	/* free another cctx if overlimit */
		773	if (cctx_idle >= MAX_IDLE_CCTX)
		774	{
		775	coro_cctx *first = cctx_first;
		776	cctx_first = first->next;
		777	--cctx_idle;
		778
		779	assert (!first->inuse);
		780	cctx_destroy (first);
675	}	781	}
676		782
677	return stack;	783	++cctx_idle;
		784	cctx->next = cctx_first;
		785	cctx_first = cctx;
678	}	786	}
679		787
680	static void	788	/** coroutine switching *****************************************************/
681	stack_put (coro_stack *stack)
682	{
683	stack->next = stack_first;
684	stack_first = stack;
685	}
686		789
687	/* never call directly, always through the coro_state_transfer global variable */	790	/* never call directly, always through the coro_state_transfer global variable */
688	static void	791	static void NOINLINE
689	transfer_impl (struct coro *prev, struct coro *next, int flags)	792	transfer (pTHX_ struct coro *prev, struct coro *next)
690	{	793	{
691	dSTACKLEVEL;	794	dSTACKLEVEL;
692		795
693	/* sometimes transfer is only called to set idle_sp */	796	/* sometimes transfer is only called to set idle_sp */
694	if (flags == TRANSFER_SET_STACKLEVEL)	797	if (!next)
		798	{
695	((coro_stack *)prev)->idle_sp = STACKLEVEL;	799	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		800	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		801	}
696	else if (prev != next)	802	else if (prev != next)
697	{	803	{
698	coro_stack *prev__stack;	804	coro_cctx *prev__cctx;
		805
		806	if (prev->flags & CF_NEW)
		807	{
		808	/* create a new empty context */
		809	Newz (0, prev->cctx, 1, coro_cctx);
		810	prev->cctx->inuse = 1;
		811	prev->flags &= ~CF_NEW;
		812	prev->flags |= CF_RUNNING;
		813	}
		814
		815	/*TODO: must not croak here */
		816	if (!prev->flags & CF_RUNNING)
		817	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		818
		819	if (next->flags & CF_RUNNING)
		820	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		821
		822	if (next->flags & CF_DESTROYED)
		823	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		824
		825	prev->flags &= ~CF_RUNNING;
		826	next->flags |= CF_RUNNING;
699		827
700	LOCK;	828	LOCK;
701		829
702	if (next->mainstack)	830	if (next->flags & CF_NEW)
703	{	831	{
704	/* coroutine already started */	832	/* need to start coroutine */
705	SAVE (prev, flags);	833	next->flags &= ~CF_NEW;
706	LOAD (next);	834	/* first get rid of the old state */
		835	save_perl (aTHX_ prev);
		836	/* setup coroutine call */
		837	setup_coro (aTHX_ next);
		838	/* need a new stack */
		839	assert (!next->cctx);
707	}	840	}
708	else	841	else
709	{	842	{
710	/* need to start coroutine */	843	/* coroutine already started */
711	/* first get rid of the old state */	844	save_perl (aTHX_ prev);
712	SAVE (prev, -1);	845	load_perl (aTHX_ next);
713	/* setup coroutine call */
714	setup_coro (next);
715	/* need a stack */
716	next->stack = 0;
717	}	846	}
718		847
719	if (!prev->stack)
720	/* create a new empty context */
721	Newz (0, prev->stack, 1, coro_stack);
722
723	prev__stack = prev->stack;	848	prev__cctx = prev->cctx;
724		849
725	/* possibly "free" the stack */	850	/* possibly "free" the cctx */
726	if (prev__stack->idle_sp == STACKLEVEL)	851	if (prev__cctx->idle_sp == STACKLEVEL)
727	{	852	{
728	stack_put (prev__stack);	853	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		854	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		855
729	prev->stack = 0;	856	prev->cctx = 0;
		857
		858	cctx_put (prev__cctx);
		859	prev__cctx->inuse = 0;
730	}	860	}
731		861
732	if (!next->stack)	862	if (!next->cctx)
733	next->stack = stack_get ();
734
735	if (prev__stack != next->stack)
736	{	863	{
737	prev__stack->top_env = PL_top_env;	864	next->cctx = cctx_get (aTHX);
738	PL_top_env = next->stack->top_env;	865	assert (!next->cctx->inuse);
739	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	866	next->cctx->inuse = 1;
740	}	867	}
741		868
		869	if (prev__cctx != next->cctx)
		870	{
		871	prev__cctx->top_env = PL_top_env;
		872	PL_top_env = next->cctx->top_env;
		873	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		874	}
		875
742	free_coro_mortal ();	876	free_coro_mortal (aTHX);
743
744	UNLOCK;	877	UNLOCK;
745	}	878	}
746	}	879	}
747		880
748	/* use this function pointer to call the above function */
749	/* this is done to increase chances of the compiler not inlining the call */
750	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
751	void (*coro_state_transfer)(struct coro *prev, struct coro *next, int flags) = transfer_impl;
752
753	struct transfer_args	881	struct transfer_args
754	{	882	{
755	struct coro *prev, *next;	883	struct coro *prev, *next;
756	int flags;
757	};	884	};
758		885
759	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	886	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
760		887
		888	/** high level stuff ********************************************************/
		889
761	static void	890	static int
762	coro_state_destroy (struct coro *coro)	891	coro_state_destroy (pTHX_ struct coro *coro)
763	{	892	{
764	if (coro->refcnt--)	893	if (coro->flags & CF_DESTROYED)
765	return;	894	return 0;
		895
		896	coro->flags |= CF_DESTROYED;
		897
		898	if (coro->flags & CF_READY)
		899	{
		900	/* reduce nready, as destroying a ready coro effectively unreadies it */
		901	/* alternative: look through all ready queues and remove the coro */
		902	LOCK;
		903	--coro_nready;
		904	UNLOCK;
		905	}
		906	else
		907	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
766		908
767	if (coro->mainstack && coro->mainstack != main_mainstack)	909	if (coro->mainstack && coro->mainstack != main_mainstack)
768	{	910	{
769	struct coro temp;	911	struct coro temp;
770		912
771	SAVE ((&temp), TRANSFER_SAVE_ALL);	913	assert (!(coro->flags & CF_RUNNING));
772	LOAD (coro);
773		914
		915	Zero (&temp, 1, struct coro);
		916	temp.save = CORO_SAVE_ALL;
		917
		918	if (coro->flags & CF_RUNNING)
		919	croak ("FATAL: tried to destroy currently running coroutine");
		920
		921	save_perl (aTHX_ &temp);
		922	load_perl (aTHX_ coro);
		923
774	destroy_stacks ();	924	coro_destroy_stacks (aTHX);
775		925
776	LOAD ((&temp)); /* this will get rid of defsv etc.. */	926	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
777		927
778	coro->mainstack = 0;	928	coro->mainstack = 0;
779	}	929	}
780		930
781	stack_free (coro->stack);	931	cctx_destroy (coro->cctx);
782	SvREFCNT_dec (coro->args);	932	SvREFCNT_dec (coro->args);
783	Safefree (coro);	933
		934	if (coro->next) coro->next->prev = coro->prev;
		935	if (coro->prev) coro->prev->next = coro->next;
		936	if (coro == coro_first) coro_first = coro->next;
		937
		938	return 1;
784	}	939	}
785		940
786	static int	941	static int
787	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	942	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
788	{	943	{
789	struct coro *coro = (struct coro *)mg->mg_ptr;	944	struct coro *coro = (struct coro *)mg->mg_ptr;
790	mg->mg_ptr = 0;	945	mg->mg_ptr = 0;
791		946
		947	coro->hv = 0;
		948
		949	if (--coro->refcnt < 0)
		950	{
792	coro_state_destroy (coro);	951	coro_state_destroy (aTHX_ coro);
		952	Safefree (coro);
		953	}
793		954
794	return 0;	955	return 0;
795	}	956	}
796		957
797	static int	958	static int
…		…
802	++coro->refcnt;	963	++coro->refcnt;
803		964
804	return 0;	965	return 0;
805	}	966	}
806		967
807	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	968	static MGVTBL coro_state_vtbl = {
		969	0, 0, 0, 0,
		970	coro_state_free,
		971	0,
		972	#ifdef MGf_DUP
		973	coro_state_dup,
		974	#else
		975	# define MGf_DUP 0
		976	#endif
		977	};
808		978
809	static struct coro *	979	static struct coro *
810	SvSTATE (SV *coro)	980	SvSTATE_ (pTHX_ SV *coro)
811	{	981	{
812	HV *stash;	982	HV *stash;
813	MAGIC *mg;	983	MAGIC *mg;
814		984
815	if (SvROK (coro))	985	if (SvROK (coro))
…		…
821	/* very slow, but rare, check */	991	/* very slow, but rare, check */
822	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	992	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
823	croak ("Coro::State object required");	993	croak ("Coro::State object required");
824	}	994	}
825		995
826	mg = SvMAGIC (coro);	996	mg = CORO_MAGIC (coro);
827	assert (mg->mg_type == PERL_MAGIC_ext);
828	return (struct coro *)mg->mg_ptr;	997	return (struct coro *)mg->mg_ptr;
829	}	998	}
830		999
		1000	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1001
831	static void	1002	static void
832	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1003	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
833	{	1004	{
834	ta->prev = SvSTATE (prev);	1005	ta->prev = SvSTATE (prev_sv);
835	ta->next = SvSTATE (next);	1006	ta->next = SvSTATE (next_sv);
836	ta->flags = flags;
837	}	1007	}
838		1008
839	static void	1009	static void
840	api_transfer (SV *prev, SV *next, int flags)	1010	api_transfer (SV *prev_sv, SV *next_sv)
841	{	1011	{
842	dTHX;	1012	dTHX;
843	struct transfer_args ta;	1013	struct transfer_args ta;
844		1014
845	prepare_transfer (&ta, prev, next, flags);	1015	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
846	TRANSFER (ta);	1016	TRANSFER (ta);
847	}	1017	}
848		1018
		1019	static int
		1020	api_save (SV *coro_sv, int new_save)
		1021	{
		1022	dTHX;
		1023	struct coro *coro = SvSTATE (coro_sv);
		1024	int old_save = coro->save;
		1025
		1026	if (new_save >= 0)
		1027	coro->save = new_save;
		1028
		1029	return old_save;
		1030	}
		1031
849	/** Coro ********************************************************************/	1032	/** Coro ********************************************************************/
850		1033
851	#define PRIO_MAX 3
852	#define PRIO_HIGH 1
853	#define PRIO_NORMAL 0
854	#define PRIO_LOW -1
855	#define PRIO_IDLE -3
856	#define PRIO_MIN -4
857
858	/* for Coro.pm */
859	static GV *coro_current, *coro_idle;
860	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
861	static int coro_nready;
862
863	static void	1034	static void
864	coro_enq (SV *sv)	1035	coro_enq (pTHX_ SV *coro_sv)
865	{	1036	{
866	int prio;
867
868	if (SvTYPE (sv) != SVt_PVHV)
869	croak ("Coro::ready tried to enqueue something that is not a coroutine");
870
871	prio = SvSTATE (sv)->prio;
872
873	av_push (coro_ready [prio - PRIO_MIN], sv);	1037	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
874	coro_nready++;
875	}	1038	}
876		1039
877	static SV *	1040	static SV *
878	coro_deq (int min_prio)	1041	coro_deq (pTHX_ int min_prio)
879	{	1042	{
880	int prio = PRIO_MAX - PRIO_MIN;	1043	int prio = PRIO_MAX - PRIO_MIN;
881		1044
882	min_prio -= PRIO_MIN;	1045	min_prio -= PRIO_MIN;
883	if (min_prio < 0)	1046	if (min_prio < 0)
884	min_prio = 0;	1047	min_prio = 0;
885		1048
886	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1049	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
887	if (AvFILLp (coro_ready [prio]) >= 0)	1050	if (AvFILLp (coro_ready [prio]) >= 0)
888	{
889	coro_nready--;
890	return av_shift (coro_ready [prio]);	1051	return av_shift (coro_ready [prio]);
891	}
892		1052
893	return 0;	1053	return 0;
894	}	1054	}
895		1055
896	static void	1056	static int
897	api_ready (SV *coro)	1057	api_ready (SV *coro_sv)
898	{	1058	{
899	dTHX;	1059	dTHX;
		1060	struct coro *coro;
900		1061
901	if (SvROK (coro))	1062	if (SvROK (coro_sv))
902	coro = SvRV (coro);	1063	coro_sv = SvRV (coro_sv);
		1064
		1065	coro = SvSTATE (coro_sv);
		1066
		1067	if (coro->flags & CF_READY)
		1068	return 0;
		1069
		1070	coro->flags |= CF_READY;
903		1071
904	LOCK;	1072	LOCK;
905	coro_enq (SvREFCNT_inc (coro));	1073	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1074	++coro_nready;
906	UNLOCK;	1075	UNLOCK;
907	}
908		1076
		1077	return 1;
		1078	}
		1079
909	static void	1080	static int
		1081	api_is_ready (SV *coro_sv)
		1082	{
		1083	dTHX;
		1084	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1085	}
		1086
		1087	static void
910	prepare_schedule (struct transfer_args *ta)	1088	prepare_schedule (pTHX_ struct transfer_args *ta)
911	{	1089	{
912	SV *current, *prev, *next;	1090	SV *prev_sv, *next_sv;
		1091
		1092	for (;;)
		1093	{
		1094	LOCK;
		1095	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1096
		1097	/* nothing to schedule: call the idle handler */
		1098	if (!next_sv)
		1099	{
		1100	dSP;
		1101	UNLOCK;
		1102
		1103	ENTER;
		1104	SAVETMPS;
		1105
		1106	PUSHMARK (SP);
		1107	PUTBACK;
		1108	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1109
		1110	FREETMPS;
		1111	LEAVE;
		1112	continue;
		1113	}
		1114
		1115	ta->next = SvSTATE (next_sv);
		1116
		1117	/* cannot transfer to destroyed coros, skip and look for next */
		1118	if (ta->next->flags & CF_DESTROYED)
		1119	{
		1120	UNLOCK;
		1121	SvREFCNT_dec (next_sv);
		1122	/* coro_nready is already taken care of by destroy */
		1123	continue;
		1124	}
		1125
		1126	--coro_nready;
		1127	UNLOCK;
		1128	break;
		1129	}
		1130
		1131	/* free this only after the transfer */
		1132	prev_sv = SvRV (coro_current);
		1133	SvRV_set (coro_current, next_sv);
		1134	ta->prev = SvSTATE (prev_sv);
		1135
		1136	assert (ta->next->flags & CF_READY);
		1137	ta->next->flags &= ~CF_READY;
913		1138
914	LOCK;	1139	LOCK;
915
916	current = GvSV (coro_current);
917
918	for (;;)
919	{
920	LOCK;
921
922	next = coro_deq (PRIO_MIN);
923
924	if (next)
925	break;
926
927	UNLOCK;
928
929	{
930	dSP;
931
932	ENTER;
933	SAVETMPS;
934
935	PUSHMARK (SP);
936	PUTBACK;
937	call_sv (GvSV (coro_idle), G_DISCARD);
938
939	FREETMPS;
940	LEAVE;
941	}
942	}
943
944	prev = SvRV (current);
945	SvRV (current) = next;
946
947	/* free this only after the transfer */
948	free_coro_mortal ();	1140	free_coro_mortal (aTHX);
949	coro_mortal = prev;	1141	coro_mortal = prev_sv;
950
951	ta->prev = SvSTATE (prev);
952	ta->next = SvSTATE (next);
953	ta->flags = TRANSFER_SAVE_ALL;
954
955	UNLOCK;	1142	UNLOCK;
956	}	1143	}
957		1144
958	static void	1145	static void
959	prepare_cede (struct transfer_args *ta)	1146	prepare_cede (pTHX_ struct transfer_args *ta)
960	{	1147	{
961	LOCK;	1148	api_ready (coro_current);
962	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
963	UNLOCK;
964
965	prepare_schedule (ta);	1149	prepare_schedule (aTHX_ ta);
		1150	}
		1151
		1152	static int
		1153	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1154	{
		1155	if (coro_nready)
		1156	{
		1157	SV *prev = SvRV (coro_current);
		1158	prepare_schedule (aTHX_ ta);
		1159	api_ready (prev);
		1160	return 1;
		1161	}
		1162	else
		1163	return 0;
966	}	1164	}
967		1165
968	static void	1166	static void
969	api_schedule (void)	1167	api_schedule (void)
970	{	1168	{
971	dTHX;	1169	dTHX;
972	struct transfer_args ta;	1170	struct transfer_args ta;
973		1171
974	prepare_schedule (&ta);	1172	prepare_schedule (aTHX_ &ta);
975	TRANSFER (ta);	1173	TRANSFER (ta);
976	}	1174	}
977		1175
978	static void	1176	static int
979	api_cede (void)	1177	api_cede (void)
980	{	1178	{
981	dTHX;	1179	dTHX;
982	struct transfer_args ta;	1180	struct transfer_args ta;
983		1181
984	prepare_cede (&ta);	1182	prepare_cede (aTHX_ &ta);
		1183
		1184	if (ta.prev != ta.next)
		1185	{
985	TRANSFER (ta);	1186	TRANSFER (ta);
		1187	return 1;
		1188	}
		1189	else
		1190	return 0;
		1191	}
		1192
		1193	static int
		1194	api_cede_notself (void)
		1195	{
		1196	dTHX;
		1197	struct transfer_args ta;
		1198
		1199	if (prepare_cede_notself (aTHX_ &ta))
		1200	{
		1201	TRANSFER (ta);
		1202	return 1;
		1203	}
		1204	else
		1205	return 0;
986	}	1206	}
987		1207
988	MODULE = Coro::State PACKAGE = Coro::State	1208	MODULE = Coro::State PACKAGE = Coro::State
989		1209
990	PROTOTYPES: DISABLE	1210	PROTOTYPES: DISABLE
…		…
996	#endif	1216	#endif
997	BOOT_PAGESIZE;	1217	BOOT_PAGESIZE;
998		1218
999	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1219	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1000		1220
1001	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1221	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1002	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1222	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1003	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1223	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1224	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1225	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1226	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1227	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1004		1228
1005	main_mainstack = PL_mainstack;	1229	main_mainstack = PL_mainstack;
		1230	main_top_env = PL_top_env;
		1231
		1232	while (main_top_env->je_prev)
		1233	main_top_env = main_top_env->je_prev;
1006		1234
1007	coroapi.ver = CORO_API_VERSION;	1235	coroapi.ver = CORO_API_VERSION;
1008	coroapi.transfer = api_transfer;	1236	coroapi.transfer = api_transfer;
1009		1237
1010	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1238	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1018	HV *hv;	1246	HV *hv;
1019	int i;	1247	int i;
1020		1248
1021	Newz (0, coro, 1, struct coro);	1249	Newz (0, coro, 1, struct coro);
1022	coro->args = newAV ();	1250	coro->args = newAV ();
		1251	coro->save = CORO_SAVE_DEF;
		1252	coro->flags = CF_NEW;
1023		1253
		1254	if (coro_first) coro_first->prev = coro;
		1255	coro->next = coro_first;
		1256	coro_first = coro;
		1257
1024	hv = newHV ();	1258	coro->hv = hv = newHV ();
1025	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1259	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1026	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1260	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1027		1261
1028	for (i = 1; i < items; i++)	1262	for (i = 1; i < items; i++)
1029	av_push (coro->args, newSVsv (ST (i)));	1263	av_push (coro->args, newSVsv (ST (i)));
1030
1031	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1032	/*coro->stack = 0;*/
1033	}	1264	}
1034	OUTPUT:	1265	OUTPUT:
		1266	RETVAL
		1267
		1268	int
		1269	save (SV *coro, int new_save = -1)
		1270	CODE:
		1271	RETVAL = api_save (coro, new_save);
		1272	OUTPUT:
		1273	RETVAL
		1274
		1275	int
		1276	save_also (SV *coro_sv, int save_also)
		1277	CODE:
		1278	{
		1279	struct coro *coro = SvSTATE (coro_sv);
		1280	RETVAL = coro->save;
		1281	coro->save |= save_also;
		1282	}
		1283	OUTPUT:
1035	RETVAL	1284	RETVAL
1036		1285
1037	void	1286	void
1038	_set_stacklevel (...)	1287	_set_stacklevel (...)
1039	ALIAS:	1288	ALIAS:
1040	Coro::State::transfer = 1	1289	Coro::State::transfer = 1
1041	Coro::schedule = 2	1290	Coro::schedule = 2
1042	Coro::cede = 3	1291	Coro::cede = 3
1043	Coro::Cont::yield = 4	1292	Coro::cede_notself = 4
1044	CODE:	1293	CODE:
1045	{	1294	{
1046	struct transfer_args ta;	1295	struct transfer_args ta;
1047		1296
1048	switch (ix)	1297	switch (ix)
1049	{	1298	{
1050	case 0:	1299	case 0:
1051	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1300	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1052	ta.next = 0;	1301	ta.next = 0;
1053	ta.flags = TRANSFER_SET_STACKLEVEL;
1054	break;	1302	break;
1055		1303
1056	case 1:	1304	case 1:
1057	if (items != 3)	1305	if (items != 2)
1058	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1306	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1059		1307
1060	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1308	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1061	break;	1309	break;
1062		1310
1063	case 2:	1311	case 2:
1064	prepare_schedule (&ta);	1312	prepare_schedule (aTHX_ &ta);
1065	break;	1313	break;
1066		1314
1067	case 3:	1315	case 3:
1068	prepare_cede (&ta);	1316	prepare_cede (aTHX_ &ta);
1069	break;	1317	break;
1070		1318
1071	case 4:	1319	case 4:
1072	{	1320	if (!prepare_cede_notself (aTHX_ &ta))
1073	SV *yieldstack;	1321	XSRETURN_EMPTY;
1074	SV *sv;
1075	AV *defav = GvAV (PL_defgv);
1076		1322
1077	yieldstack = *hv_fetch (
1078	(HV *)SvRV (GvSV (coro_current)),
1079	"yieldstack", sizeof ("yieldstack") - 1,
1080	0
1081	);
1082
1083	/* set up @_ -- ugly */
1084	av_clear (defav);
1085	av_fill (defav, items - 1);
1086	while (items--)
1087	av_store (defav, items, SvREFCNT_inc (ST(items)));
1088
1089	sv = av_pop ((AV *)SvRV (yieldstack));
1090	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1091	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1092	ta.flags = 0;
1093	SvREFCNT_dec (sv);
1094	}
1095	break;	1323	break;
1096
1097	}	1324	}
1098		1325
		1326	BARRIER;
1099	TRANSFER (ta);	1327	TRANSFER (ta);
1100	}
1101		1328
1102	void	1329	if (GIMME_V != G_VOID && ta.next != ta.prev)
1103	_clone_state_from (SV *dst, SV *src)	1330	XSRETURN_YES;
		1331	}
		1332
		1333	bool
		1334	_destroy (SV *coro_sv)
1104	CODE:	1335	CODE:
1105	{	1336	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1106	struct coro *coro_src = SvSTATE (src);	1337	OUTPUT:
1107		1338	RETVAL
1108	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1109
1110	++coro_src->refcnt;
1111	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1112	}
1113
1114	void
1115	_nonlocal_goto (IV nextop)
1116	CODE:
1117	/* uuh, somebody will kill me again for this */
1118	PL_op->op_next = INT2PTR (OP *, nextop);
1119		1339
1120	void	1340	void
1121	_exit (code)	1341	_exit (code)
1122	int code	1342	int code
1123	PROTOTYPE: $	1343	PROTOTYPE: $
1124	CODE:	1344	CODE:
1125	_exit (code);	1345	_exit (code);
1126		1346
		1347	int
		1348	cctx_stacksize (int new_stacksize = 0)
		1349	CODE:
		1350	RETVAL = coro_stacksize;
		1351	if (new_stacksize)
		1352	coro_stacksize = new_stacksize;
		1353	OUTPUT:
		1354	RETVAL
		1355
		1356	int
		1357	cctx_count ()
		1358	CODE:
		1359	RETVAL = cctx_count;
		1360	OUTPUT:
		1361	RETVAL
		1362
		1363	int
		1364	cctx_idle ()
		1365	CODE:
		1366	RETVAL = cctx_idle;
		1367	OUTPUT:
		1368	RETVAL
		1369
		1370	void
		1371	list ()
		1372	PPCODE:
		1373	{
		1374	struct coro *coro;
		1375	for (coro = coro_first; coro; coro = coro->next)
		1376	if (coro->hv)
		1377	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1378	}
		1379
		1380	void
		1381	_eval (Coro::State coro, SV *coderef)
		1382	CODE:
		1383	{
		1384	if (coro->mainstack)
		1385	{
		1386	struct coro temp;
		1387	Zero (&temp, 1, struct coro);
		1388	temp.save = CORO_SAVE_ALL;
		1389
		1390	if (!(coro->flags & CF_RUNNING))
		1391	{
		1392	save_perl (aTHX_ &temp);
		1393	load_perl (aTHX_ coro);
		1394	}
		1395
		1396	{
		1397	dSP;
		1398	ENTER;
		1399	SAVETMPS;
		1400	PUSHMARK (SP);
		1401	PUTBACK;
		1402	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1403	SPAGAIN;
		1404	FREETMPS;
		1405	LEAVE;
		1406	PUTBACK;
		1407	}
		1408
		1409	if (!(coro->flags & CF_RUNNING))
		1410	{
		1411	save_perl (aTHX_ coro);
		1412	load_perl (aTHX_ &temp);
		1413	}
		1414	}
		1415	}
		1416
		1417	SV *
		1418	is_ready (Coro::State coro)
		1419	PROTOTYPE: $
		1420	ALIAS:
		1421	is_ready = CF_READY
		1422	is_running = CF_RUNNING
		1423	is_new = CF_NEW
		1424	is_destroyed = CF_DESTROYED
		1425	CODE:
		1426	RETVAL = boolSV (coro->flags & ix);
		1427	OUTPUT:
		1428	RETVAL
		1429
		1430	IV
		1431	rss (Coro::State coro)
		1432	PROTOTYPE: $
		1433	CODE:
		1434	RETVAL = coro_rss (coro);
		1435	OUTPUT:
		1436	RETVAL
		1437
		1438
1127	MODULE = Coro::State PACKAGE = Coro	1439	MODULE = Coro::State PACKAGE = Coro
1128		1440
1129	BOOT:	1441	BOOT:
1130	{	1442	{
1131	int i;	1443	int i;
…		…
1137	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1449	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1138	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1450	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1139	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1451	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1140	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1452	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1141		1453
1142	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1454	coro_current = get_sv ("Coro::current", FALSE);
1143	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1455	SvREADONLY_on (coro_current);
1144		1456
1145	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1457	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1146	coro_ready[i] = newAV ();	1458	coro_ready[i] = newAV ();
1147		1459
1148	{	1460	{
1149	SV *sv = perl_get_sv("Coro::API", 1);	1461	SV *sv = perl_get_sv("Coro::API", 1);
1150		1462
1151	coroapi.schedule = api_schedule;	1463	coroapi.schedule = api_schedule;
		1464	coroapi.save = api_save;
1152	coroapi.cede = api_cede;	1465	coroapi.cede = api_cede;
		1466	coroapi.cede_notself = api_cede_notself;
1153	coroapi.ready = api_ready;	1467	coroapi.ready = api_ready;
		1468	coroapi.is_ready = api_is_ready;
1154	coroapi.nready = &coro_nready;	1469	coroapi.nready = &coro_nready;
1155	coroapi.current = coro_current;	1470	coroapi.current = coro_current;
1156		1471
1157	GCoroAPI = &coroapi;	1472	GCoroAPI = &coroapi;
1158	sv_setiv (sv, (IV)&coroapi);	1473	sv_setiv (sv, (IV)&coroapi);
1159	SvREADONLY_on (sv);	1474	SvREADONLY_on (sv);
1160	}	1475	}
1161	}	1476	}
		1477
		1478	void
		1479	_set_current (SV *current)
		1480	PROTOTYPE: $
		1481	CODE:
		1482	SvREFCNT_dec (SvRV (coro_current));
		1483	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1162		1484
1163	int	1485	int
1164	prio (Coro::State coro, int newprio = 0)	1486	prio (Coro::State coro, int newprio = 0)
1165	ALIAS:	1487	ALIAS:
1166	nice = 1	1488	nice = 1
…		…
1169	RETVAL = coro->prio;	1491	RETVAL = coro->prio;
1170		1492
1171	if (items > 1)	1493	if (items > 1)
1172	{	1494	{
1173	if (ix)	1495	if (ix)
1174	newprio += coro->prio;	1496	newprio = coro->prio - newprio;
1175		1497
1176	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1498	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1177	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1499	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1178		1500
1179	coro->prio = newprio;	1501	coro->prio = newprio;
1180	}	1502	}
1181	}	1503	}
		1504	OUTPUT:
		1505	RETVAL
1182		1506
1183	void	1507	SV *
1184	ready (SV *self)	1508	ready (SV *self)
1185	PROTOTYPE: $	1509	PROTOTYPE: $
1186	CODE:	1510	CODE:
1187	api_ready (self);	1511	RETVAL = boolSV (api_ready (self));
		1512	OUTPUT:
		1513	RETVAL
1188		1514
1189	int	1515	int
1190	nready (...)	1516	nready (...)
1191	PROTOTYPE:	1517	PROTOTYPE:
1192	CODE:	1518	CODE:
…		…
1198		1524
1199	SV *	1525	SV *
1200	_get_state ()	1526	_get_state ()
1201	CODE:	1527	CODE:
1202	{	1528	{
1203	struct {	1529	struct io_state *data;
1204	int errorno;
1205	int laststype;
1206	int laststatval;
1207	Stat_t statcache;
1208	} data;
1209		1530
		1531	RETVAL = newSV (sizeof (struct io_state));
		1532	data = (struct io_state *)SvPVX (RETVAL);
		1533	SvCUR_set (RETVAL, sizeof (struct io_state));
		1534	SvPOK_only (RETVAL);
		1535
1210	data.errorno = errno;	1536	data->errorno = errno;
1211	data.laststype = PL_laststype;	1537	data->laststype = PL_laststype;
1212	data.laststatval = PL_laststatval;	1538	data->laststatval = PL_laststatval;
1213	data.statcache = PL_statcache;	1539	data->statcache = PL_statcache;
1214
1215	RETVAL = newSVpvn ((char *)&data, sizeof data);
1216	}	1540	}
1217	OUTPUT:	1541	OUTPUT:
1218	RETVAL	1542	RETVAL
1219		1543
1220	void	1544	void
1221	_set_state (char *data_)	1545	_set_state (char *data_)
1222	PROTOTYPE: $	1546	PROTOTYPE: $
1223	CODE:	1547	CODE:
1224	{	1548	{
1225	struct {	1549	struct io_state *data = (void *)data_;
1226	int errorno;
1227	int laststype;
1228	int laststatval;
1229	Stat_t statcache;
1230	} *data = (void *)data_;
1231		1550
1232	errno = data->errorno;	1551	errno = data->errorno;
1233	PL_laststype = data->laststype;	1552	PL_laststype = data->laststype;
1234	PL_laststatval = data->laststatval;	1553	PL_laststatval = data->laststatval;
1235	PL_statcache = data->statcache;	1554	PL_statcache = data->statcache;
1236	}	1555	}
		1556

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