ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.92 by root, Sun Nov 26 02:16:19 2006 UTC vs.
Revision 1.162 by root, Sun Sep 23 21:49:58 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 <stdio.h>	75	/* 5.8.7 */
33	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
34		79
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	81	# undef CORO_STACKGUARD
37	#endif
38
39	#ifndef STACKGUARD
40	# define STACKGUARD 0
41	#endif
42
43	#ifdef HAVE_MMAP
44	# include <unistd.h>
45	# include <sys/mman.h>
46	# ifndef MAP_ANONYMOUS
47	# ifdef MAP_ANON
48	# define MAP_ANONYMOUS MAP_ANON
49	# else
50	# undef HAVE_MMAP
51	# endif
52	# endif	82	#endif
53	# include <limits.h>	83
54	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
55	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif	86	#endif
61	#endif
62		87
63	/* The next macro should declare a variable stacklevel that contains and approximation	88	/* prefer perl internal functions over our own? */
64	* to the current C stack pointer. Its property is that it changes with each call	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
65	* and should be unique. */	90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
		93	/* The next macros try to return the current stack pointer, in an as
		94	* portable way as possible. */
66	#define dSTACKLEVEL int stacklevel	95	#define dSTACKLEVEL volatile char stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	96	#define STACKLEVEL ((void *)&stacklevel)
68		97
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		99
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	100	#if __GNUC__ >= 3
		101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		103	#else
		104	# define attribute(x)
		105	# define BARRIER
		106	#endif
		107
		108	#define NOINLINE attribute ((noinline))
72		109
73	#include "CoroAPI.h"	110	#include "CoroAPI.h"
74
75	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
76		111
77	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
78	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
79	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
80	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
81	#else	116	#else
82	# define LOCK (void)0	117	# define LOCK (void)0
83	# define UNLOCK (void)0	118	# define UNLOCK (void)0
84	#endif	119	#endif
85		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
86	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
87	static AV *main_mainstack; /* used to differentiate between $main and others */	132	static AV *main_mainstack; /* used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
88	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
89	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
90		136
		137	/* async_pool helper stuff */
		138	static SV *sv_pool_rss;
		139	static SV *sv_pool_size;
		140	static AV *av_async_pool;
		141
		142	static struct coro_cctx *cctx_first;
		143	static int cctx_count, cctx_idle;
		144
91	/* this is a structure representing a c-level coroutine */	145	/* this is a structure representing a c-level coroutine */
92	typedef struct coro_stack {	146	typedef struct coro_cctx {
93	struct coro_stack *next;	147	struct coro_cctx *next;
94		148
95	void *idle_sp; /* original stacklevel when coroutine was created */	149	/* the stack */
96	void *sptr;	150	void *sptr;
97	long ssize; /* positive == mmap, otherwise malloc */	151	size_t ssize;
98		152
99	/* cpu state */	153	/* cpu state */
		154	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		155	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		156	JMPENV *top_env;
100	coro_context cctx;	157	coro_context cctx;
101	JMPENV *top_env;
102	} coro_stack;
103		158
104	/* the (fake) coro_stack representing the main program */	159	#if CORO_USE_VALGRIND
105	static coro_stack *main_stack;	160	int valgrind_id;
		161	#endif
		162	char inuse, mapped;
		163	} coro_cctx;
		164
		165	enum {
		166	CF_RUNNING = 0x0001, /* coroutine is running */
		167	CF_READY = 0x0002, /* coroutine is ready */
		168	CF_NEW = 0x0004, /* has never been switched to */
		169	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		170	};
106		171
107	/* this is a structure representing a perl-level coroutine */	172	/* this is a structure representing a perl-level coroutine */
108	struct coro {	173	struct coro {
109	/* the c coroutine allocated to this perl coroutine, if any */	174	/* the c coroutine allocated to this perl coroutine, if any */
110	coro_stack *stack;	175	coro_cctx *cctx;
111		176
112	/* data associated with this coroutine (initial args) */	177	/* data associated with this coroutine (initial args) */
113	AV *args;	178	AV *args;
114	int refcnt;	179	int refcnt;
		180	int save; /* CORO_SAVE flags */
		181	int flags; /* CF_ flags */
115		182
116	/* optionally saved, might be zero */	183	/* optionally saved, might be zero */
117	AV *defav;	184	AV *defav; /* @_ */
118	SV *defsv;	185	SV *defsv; /* $_ */
119	SV *errsv;	186	SV *errsv; /* $@ */
		187	GV *deffh; /* default filehandle */
		188	SV *irssv; /* $/ */
		189	SV *irssv_sv; /* real $/ cache */
120		190
121	/* saved global state not related to stacks */	191	#define VAR(name,type) type name;
122	U8 dowarn;	192	# include "state.h"
123	I32 in_eval;	193	#undef VAR
124
125	/* the stacks and related info (callchain etc..) */
126	PERL_SI *curstackinfo;
127	AV *curstack;
128	AV *mainstack;
129	SV **stack_sp;
130	OP *op;
131	SV **curpad;
132	AV *comppad;
133	CV *compcv;
134	SV **stack_base;
135	SV **stack_max;
136	SV **tmps_stack;
137	I32 tmps_floor;
138	I32 tmps_ix;
139	I32 tmps_max;
140	I32 *markstack;
141	I32 *markstack_ptr;
142	I32 *markstack_max;
143	I32 *scopestack;
144	I32 scopestack_ix;
145	I32 scopestack_max;
146	ANY *savestack;
147	I32 savestack_ix;
148	I32 savestack_max;
149	OP **retstack;
150	I32 retstack_ix;
151	I32 retstack_max;
152	PMOP *curpm;
153	COP *curcop;
154		194
155	/* coro process data */	195	/* coro process data */
156	int prio;	196	int prio;
		197
		198	/* linked list */
		199	struct coro *next, *prev;
		200	HV *hv; /* the perl hash associated with this coro, if any */
157	};	201	};
158		202
159	typedef struct coro *Coro__State;	203	typedef struct coro *Coro__State;
160	typedef struct coro *Coro__State_or_hashref;	204	typedef struct coro *Coro__State_or_hashref;
161		205
		206	/** Coro ********************************************************************/
		207
		208	#define PRIO_MAX 3
		209	#define PRIO_HIGH 1
		210	#define PRIO_NORMAL 0
		211	#define PRIO_LOW -1
		212	#define PRIO_IDLE -3
		213	#define PRIO_MIN -4
		214
		215	/* for Coro.pm */
		216	static SV *coro_current;
		217	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		218	static int coro_nready;
		219	static struct coro *coro_first;
		220
		221	/** lowlevel stuff **********************************************************/
		222
162	static AV *	223	static AV *
163	coro_clone_padlist (pTHX_ CV *cv)	224	coro_clone_padlist (pTHX_ CV *cv)
164	{	225	{
165	AV *padlist = CvPADLIST (cv);	226	AV *padlist = CvPADLIST (cv);
166	AV *newpadlist, *newpad;	227	AV *newpadlist, *newpad;
167		228
168	newpadlist = newAV ();	229	newpadlist = newAV ();
169	AvREAL_off (newpadlist);	230	AvREAL_off (newpadlist);
170	#if PERL_VERSION < 9	231	#if PERL_VERSION_ATLEAST (5,9,0)
		232	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		233	#else
171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	234	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
172	#else
173	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
174	#endif	235	#endif
175	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	236	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
176	--AvFILLp (padlist);	237	--AvFILLp (padlist);
177		238
178	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	239	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
222		283
223	#define PERL_MAGIC_coro PERL_MAGIC_ext	284	#define PERL_MAGIC_coro PERL_MAGIC_ext
224		285
225	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	286	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
226		287
		288	#define CORO_MAGIC(cv) \
		289	SvMAGIC (cv) \
		290	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		291	? SvMAGIC (cv) \
		292	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		293	: 0
		294
227	/* the next two functions merely cache the padlists */	295	/* the next two functions merely cache the padlists */
228	static void	296	static void
229	get_padlist (pTHX_ CV *cv)	297	get_padlist (pTHX_ CV *cv)
230	{	298	{
231	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	299	MAGIC *mg = CORO_MAGIC (cv);
		300	AV *av;
232		301
233	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	302	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
234	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	303	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
235	else	304	else
236	{	305	{
237	#if 0	306	#if CORO_PREFER_PERL_FUNCTIONS
238	/* this should work - but it doesn't :( */	307	/* this is probably cleaner, but also slower? */
239	CV *cp = Perl_cv_clone (aTHX_ cv);	308	CV *cp = Perl_cv_clone (cv);
240	CvPADLIST (cv) = CvPADLIST (cp);	309	CvPADLIST (cv) = CvPADLIST (cp);
241	CvPADLIST (cp) = 0;	310	CvPADLIST (cp) = 0;
242	SvREFCNT_dec (cp);	311	SvREFCNT_dec (cp);
243	#else	312	#else
244	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	313	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
247	}	316	}
248		317
249	static void	318	static void
250	put_padlist (pTHX_ CV *cv)	319	put_padlist (pTHX_ CV *cv)
251	{	320	{
252	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	321	MAGIC *mg = CORO_MAGIC (cv);
		322	AV *av;
253		323
254	if (!mg)	324	if (!mg)
255	{	325	{
256	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	326	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
257	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	327	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
258	mg->mg_virtual = &vtbl_coro;	328	mg->mg_virtual = &vtbl_coro;
259	mg->mg_obj = (SV *)newAV ();	329	mg->mg_obj = (SV *)newAV ();
260	}	330	}
261		331
262	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	332	av = (AV *)mg->mg_obj;
		333
		334	if (AvFILLp (av) >= AvMAX (av))
		335	av_extend (av, AvMAX (av) + 1);
		336
		337	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
263	}	338	}
		339
		340	/** load & save, init *******************************************************/
264		341
265	#define SB do {	342	#define SB do {
266	#define SE } while (0)	343	#define SE } while (0)
267		344
268	#define LOAD(state) load_state(aTHX_ (state));
269	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
270
271	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	345	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
272		346
273	static void	347	static void
274	load_state(pTHX_ Coro__State c)	348	load_perl (pTHX_ Coro__State c)
275	{	349	{
276	PL_dowarn = c->dowarn;	350	#define VAR(name,type) PL_ ## name = c->name;
277	PL_in_eval = c->in_eval;	351	# include "state.h"
278		352	#undef VAR
279	PL_curstackinfo = c->curstackinfo;
280	PL_curstack = c->curstack;
281	PL_mainstack = c->mainstack;
282	PL_stack_sp = c->stack_sp;
283	PL_op = c->op;
284	PL_curpad = c->curpad;
285	PL_comppad = c->comppad;
286	PL_compcv = c->compcv;
287	PL_stack_base = c->stack_base;
288	PL_stack_max = c->stack_max;
289	PL_tmps_stack = c->tmps_stack;
290	PL_tmps_floor = c->tmps_floor;
291	PL_tmps_ix = c->tmps_ix;
292	PL_tmps_max = c->tmps_max;
293	PL_markstack = c->markstack;
294	PL_markstack_ptr = c->markstack_ptr;
295	PL_markstack_max = c->markstack_max;
296	PL_scopestack = c->scopestack;
297	PL_scopestack_ix = c->scopestack_ix;
298	PL_scopestack_max = c->scopestack_max;
299	PL_savestack = c->savestack;
300	PL_savestack_ix = c->savestack_ix;
301	PL_savestack_max = c->savestack_max;
302	#if PERL_VERSION < 9
303	PL_retstack = c->retstack;
304	PL_retstack_ix = c->retstack_ix;
305	PL_retstack_max = c->retstack_max;
306	#endif
307	PL_curpm = c->curpm;
308	PL_curcop = c->curcop;
309		353
310	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	354	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
311	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	355	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
312	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	356	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		357	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		358
		359	if (c->irssv)
		360	{
		361	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		362	{
		363	SvREFCNT_dec (c->irssv);
		364	c->irssv = 0;
		365	}
		366	else
		367	{
		368	REPLACE_SV (PL_rs, c->irssv);
		369	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		370	sv_setsv (c->irssv_sv, PL_rs);
		371	}
		372	}
313		373
314	{	374	{
315	dSP;	375	dSP;
316	CV *cv;	376	CV *cv;
317		377
318	/* now do the ugly restore mess */	378	/* now do the ugly restore mess */
319	while ((cv = (CV *)POPs))	379	while ((cv = (CV *)POPs))
320	{	380	{
321	AV *padlist = (AV *)POPs;
322
323	if (padlist)
324	{
325	put_padlist (aTHX_ cv); /* mark this padlist as available */	381	put_padlist (aTHX_ cv); /* mark this padlist as available */
326	CvPADLIST(cv) = padlist;	382	CvDEPTH (cv) = PTR2IV (POPs);
327	}	383	CvPADLIST (cv) = (AV *)POPs;
328
329	++CvDEPTH(cv);
330	}	384	}
331		385
332	PUTBACK;	386	PUTBACK;
333	}	387	}
334	}	388	}
335		389
336	static void	390	static void
337	save_state(pTHX_ Coro__State c, int flags)	391	save_perl (pTHX_ Coro__State c)
338	{	392	{
339	{	393	{
340	dSP;	394	dSP;
341	I32 cxix = cxstack_ix;	395	I32 cxix = cxstack_ix;
342	PERL_CONTEXT *ccstk = cxstack;	396	PERL_CONTEXT *ccstk = cxstack;
…		…
345	/*	399	/*
346	* the worst thing you can imagine happens first - we have to save	400	* the worst thing you can imagine happens first - we have to save
347	* (and reinitialize) all cv's in the whole callchain :(	401	* (and reinitialize) all cv's in the whole callchain :(
348	*/	402	*/
349		403
350	PUSHs (Nullsv);	404	XPUSHs (Nullsv);
351	/* this loop was inspired by pp_caller */	405	/* this loop was inspired by pp_caller */
352	for (;;)	406	for (;;)
353	{	407	{
354	while (cxix >= 0)	408	while (cxix >= 0)
355	{	409	{
356	PERL_CONTEXT *cx = &ccstk[cxix--];	410	PERL_CONTEXT *cx = &ccstk[cxix--];
357		411
358	if (CxTYPE(cx) == CXt_SUB)	412	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
359	{	413	{
360	CV *cv = cx->blk_sub.cv;	414	CV *cv = cx->blk_sub.cv;
		415
361	if (CvDEPTH(cv))	416	if (CvDEPTH (cv))
362	{	417	{
363	EXTEND (SP, CvDEPTH(cv)*2);	418	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));	419	PUSHs ((SV *)CvPADLIST (cv));
		420	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
373	PUSHs ((SV *)cv);	421	PUSHs ((SV *)cv);
374		422
		423	CvDEPTH (cv) = 0;
375	get_padlist (aTHX_ cv);	424	get_padlist (aTHX_ cv);
376	}	425	}
377	}	426	}
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	}	427	}
387		428
388	if (top_si->si_type == PERLSI_MAIN)	429	if (top_si->si_type == PERLSI_MAIN)
389	break;	430	break;
390		431
391	top_si = top_si->si_prev;	432	top_si = top_si->si_prev;
392	ccstk = top_si->si_cxstack;	433	ccstk = top_si->si_cxstack;
393	cxix = top_si->si_cxix;	434	cxix = top_si->si_cxix;
394	}	435	}
395		436
396	PUTBACK;	437	PUTBACK;
397	}	438	}
398		439
399	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	440	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;	441	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
401	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	442	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		443	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		444	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
402		445
403	c->dowarn = PL_dowarn;	446	#define VAR(name,type)c->name = PL_ ## name;
404	c->in_eval = PL_in_eval;	447	# include "state.h"
405		448	#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	}	449	}
437		450
438	/*	451	/*
439	* allocate various perl stacks. This is an exact copy	452	* allocate various perl stacks. This is an exact copy
440	* of perl.c:init_stacks, except that it uses less memory	453	* of perl.c:init_stacks, except that it uses less memory
441	* on the (sometimes correct) assumption that coroutines do	454	* on the (sometimes correct) assumption that coroutines do
442	* not usually need a lot of stackspace.	455	* not usually need a lot of stackspace.
443	*/	456	*/
		457	#if CORO_PREFER_PERL_FUNCTIONS
		458	# define coro_init_stacks init_stacks
		459	#else
444	static void	460	static void
445	coro_init_stacks (pTHX)	461	coro_init_stacks (pTHX)
446	{	462	{
447	LOCK;	463	PL_curstackinfo = new_stackinfo(64, 6);
448
449	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
450	PL_curstackinfo->si_type = PERLSI_MAIN;	464	PL_curstackinfo->si_type = PERLSI_MAIN;
451	PL_curstack = PL_curstackinfo->si_stack;	465	PL_curstack = PL_curstackinfo->si_stack;
452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	466	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453		467
454	PL_stack_base = AvARRAY(PL_curstack);	468	PL_stack_base = AvARRAY(PL_curstack);
455	PL_stack_sp = PL_stack_base;	469	PL_stack_sp = PL_stack_base;
456	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	470	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
457		471
458	New(50,PL_tmps_stack,96,SV*);	472	New(50,PL_tmps_stack,64,SV*);
459	PL_tmps_floor = -1;	473	PL_tmps_floor = -1;
460	PL_tmps_ix = -1;	474	PL_tmps_ix = -1;
461	PL_tmps_max = 96;	475	PL_tmps_max = 64;
462		476
463	New(54,PL_markstack,16,I32);	477	New(54,PL_markstack,16,I32);
464	PL_markstack_ptr = PL_markstack;	478	PL_markstack_ptr = PL_markstack;
465	PL_markstack_max = PL_markstack + 16;	479	PL_markstack_max = PL_markstack + 16;
466		480
…		…
470		484
471	New(54,PL_scopestack,16,I32);	485	New(54,PL_scopestack,16,I32);
472	PL_scopestack_ix = 0;	486	PL_scopestack_ix = 0;
473	PL_scopestack_max = 16;	487	PL_scopestack_max = 16;
474		488
475	New(54,PL_savestack,96,ANY);	489	New(54,PL_savestack,64,ANY);
476	PL_savestack_ix = 0;	490	PL_savestack_ix = 0;
477	PL_savestack_max = 96;	491	PL_savestack_max = 64;
478		492
479	#if PERL_VERSION < 9	493	#if !PERL_VERSION_ATLEAST (5,9,0)
480	New(54,PL_retstack,8,OP*);	494	New(54,PL_retstack,4,OP*);
481	PL_retstack_ix = 0;	495	PL_retstack_ix = 0;
482	PL_retstack_max = 8;	496	PL_retstack_max = 4;
483	#endif	497	#endif
484
485	UNLOCK;
486	}	498	}
		499	#endif
487		500
488	/*	501	/*
489	* destroy the stacks, the callchain etc...	502	* destroy the stacks, the callchain etc...
490	*/	503	*/
491	static void	504	static void
492	destroy_stacks(pTHX)	505	coro_destroy_stacks (pTHX)
493	{	506	{
494	if (!IN_DESTRUCT)	507	if (!IN_DESTRUCT)
495	{	508	{
496	/* is this ugly, I ask? */	509	/* restore all saved variables and stuff */
497	LEAVE_SCOPE (0);	510	LEAVE_SCOPE (0);
		511	assert (PL_tmps_floor == -1);
498		512
499	/* sure it is, but more important: is it correct?? :/ */	513	/* free all temporaries */
500	FREETMPS;	514	FREETMPS;
		515	assert (PL_tmps_ix == -1);
501		516
		517	/* unwind all extra stacks */
502	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	518	POPSTACK_TO (PL_mainstack);
		519
		520	/* unwind main stack */
		521	dounwind (-1);
503	}	522	}
504		523
505	while (PL_curstackinfo->si_next)	524	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	525	PL_curstackinfo = PL_curstackinfo->si_next;
507		526
508	while (PL_curstackinfo)	527	while (PL_curstackinfo)
509	{	528	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	529	PERL_SI *p = PL_curstackinfo->si_prev;
511		530
512	{ /*D*//*remove*/
513	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */
516	}
517
518	if (!IN_DESTRUCT)	531	if (!IN_DESTRUCT)
519	{
520	dounwind (-1);/*D*//*remove*/
521	SvREFCNT_dec (PL_curstackinfo->si_stack);	532	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}
523		533
524	Safefree (PL_curstackinfo->si_cxstack);	534	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree (PL_curstackinfo);	535	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	536	PL_curstackinfo = p;
527	}	537	}
528		538
529	Safefree (PL_tmps_stack);	539	Safefree (PL_tmps_stack);
530	Safefree (PL_markstack);	540	Safefree (PL_markstack);
531	Safefree (PL_scopestack);	541	Safefree (PL_scopestack);
532	Safefree (PL_savestack);	542	Safefree (PL_savestack);
533	#if PERL_VERSION < 9	543	#if !PERL_VERSION_ATLEAST (5,9,0)
534	Safefree (PL_retstack);	544	Safefree (PL_retstack);
535	#endif	545	#endif
536	}	546	}
537		547
		548	static size_t
		549	coro_rss (struct coro *coro)
		550	{
		551	size_t rss = sizeof (coro);
		552
		553	if (coro->mainstack)
		554	{
		555	if (coro->flags & CF_RUNNING)
		556	{
		557	#define VAR(name,type)coro->name = PL_ ## name;
		558	# include "state.h"
		559	#undef VAR
		560	}
		561
		562	rss += sizeof (coro->curstackinfo);
		563	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		564	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		565	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		566	rss += coro->tmps_max * sizeof (SV *);
		567	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		568	rss += coro->scopestack_max * sizeof (I32);
		569	rss += coro->savestack_max * sizeof (ANY);
		570
		571	#if !PERL_VERSION_ATLEAST (5,9,0)
		572	rss += coro->retstack_max * sizeof (OP *);
		573	#endif
		574	}
		575
		576	return rss;
		577	}
		578
		579	/** coroutine stack handling ************************************************/
		580
538	static void	581	static void
539	setup_coro (struct coro *coro)	582	setup_coro (pTHX_ struct coro *coro)
540	{	583	{
541	/*	584	/*
542	* emulate part of the perl startup here.	585	* emulate part of the perl startup here.
543	*/	586	*/
544	dTHX;	587	coro_init_stacks (aTHX);
		588
		589	PL_curcop = &PL_compiling;
		590	PL_in_eval = EVAL_NULL;
		591	PL_comppad = 0;
		592	PL_curpm = 0;
		593	PL_localizing = 0;
		594	PL_dirty = 0;
		595	PL_restartop = 0;
		596
		597	{
		598	dSP;
		599	LOGOP myop;
		600
		601	SvREFCNT_dec (GvAV (PL_defgv));
		602	GvAV (PL_defgv) = coro->args; coro->args = 0;
		603
		604	Zero (&myop, 1, LOGOP);
		605	myop.op_next = Nullop;
		606	myop.op_flags = OPf_WANT_VOID;
		607
		608	PUSHMARK (SP);
		609	XPUSHs (av_shift (GvAV (PL_defgv)));
		610	PUTBACK;
		611	PL_op = (OP *)&myop;
		612	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		613	SPAGAIN;
		614	}
		615
		616	ENTER; /* necessary e.g. for dounwind */
		617	}
		618
		619	static void
		620	free_coro_mortal (pTHX)
		621	{
		622	if (coro_mortal)
		623	{
		624	SvREFCNT_dec (coro_mortal);
		625	coro_mortal = 0;
		626	}
		627	}
		628
		629	/* inject a fake call to Coro::State::_cctx_init into the execution */
		630	/* _cctx_init should be careful, as it could be called at almost any time */
		631	/* during execution of a perl program */
		632	static void NOINLINE
		633	prepare_cctx (pTHX_ coro_cctx *cctx)
		634	{
545	dSP;	635	dSP;
546	UNOP myop;	636	LOGOP myop;
547	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
548		637
549	coro_init_stacks (aTHX);
550	/*PL_curcop = 0;*/
551	/*PL_in_eval = PL_in_eval;*/ /* inherit */
552	SvREFCNT_dec (GvAV (PL_defgv));
553	GvAV (PL_defgv) = coro->args; coro->args = 0;
554
555	SPAGAIN;
556
557	Zero (&myop, 1, UNOP);	638	Zero (&myop, 1, LOGOP);
558	myop.op_next = Nullop;	639	myop.op_next = PL_op;
559	myop.op_flags = OPf_WANT_VOID;	640	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
560		641
		642	PUSHMARK (SP);
		643	EXTEND (SP, 2);
		644	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		645	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		646	PUTBACK;
561	PL_op = (OP *)&myop;	647	PL_op = (OP *)&myop;
562
563	PUSHMARK(SP);
564	XPUSHs (sub_init);
565	PUTBACK;
566	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	648	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
567	SPAGAIN;	649	SPAGAIN;
568
569	ENTER; /* necessary e.g. for dounwind */
570	}	650	}
571		651
572	static void	652	/*
573	free_coro_mortal ()	653	* this is a _very_ stripped down perl interpreter ;)
574	{	654	*/
575	if (coro_mortal)
576	{
577	SvREFCNT_dec (coro_mortal);
578	coro_mortal = 0;
579	}
580	}
581
582	static void	655	static void
583	coro_run (void *arg)	656	coro_run (void *arg)
584	{	657	{
		658	dTHX;
		659
		660	/* coro_run is the alternative tail of transfer(), so unlock here. */
		661	UNLOCK;
		662
		663	PL_top_env = &PL_start_env;
		664
		665	/* inject a fake subroutine call to cctx_init */
		666	prepare_cctx (aTHX_ (coro_cctx *)arg);
		667
		668	/* somebody or something will hit me for both perl_run and PL_restartop */
		669	PL_restartop = PL_op;
		670	perl_run (PL_curinterp);
		671
585	/*	672	/*
586	* this is a _very_ stripped down perl interpreter ;)	673	* If perl-run returns we assume exit() was being called or the coro
		674	* fell off the end, which seems to be the only valid (non-bug)
		675	* reason for perl_run to return. We try to exit by jumping to the
		676	* bootstrap-time "top" top_env, as we cannot restore the "main"
		677	* coroutine as Coro has no such concept
587	*/	678	*/
588	dTHX;
589	PL_top_env = &PL_start_env;	679	PL_top_env = main_top_env;
590		680	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
591	UNLOCK;
592
593	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
594	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
595	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
596
597	/* somebody will hit me for both perl_run and PL_restart_op */
598	perl_run (aTHX_ PERL_GET_CONTEXT);
599
600	abort ();
601	}	681	}
602		682
603	static coro_stack *	683	static coro_cctx *
604	stack_new ()	684	cctx_new ()
605	{	685	{
606	coro_stack *stack;	686	coro_cctx *cctx;
		687	void *stack_start;
		688	size_t stack_size;
607		689
		690	++cctx_count;
		691
608	New (0, stack, 1, coro_stack);	692	Newz (0, cctx, 1, coro_cctx);
609		693
610	#if HAVE_MMAP	694	#if HAVE_MMAP
611		695
612	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	696	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		697	/* mmap supposedly does allocate-on-write for us */
613	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	698	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
614		699
615	if (stack->sptr == (void *)-1)	700	if (cctx->sptr != (void *)-1)
		701	{
		702	# if CORO_STACKGUARD
		703	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		704	# endif
		705	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		706	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		707	cctx->mapped = 1;
616	{	708	}
		709	else
		710	#endif
		711	{
		712	cctx->ssize = coro_stacksize * (long)sizeof (long);
		713	New (0, cctx->sptr, coro_stacksize, long);
		714
		715	if (!cctx->sptr)
		716	{
617	perror ("FATAL: unable to mmap stack for coroutine");	717	perror ("FATAL: unable to allocate stack for coroutine");
618	_exit (EXIT_FAILURE);	718	_exit (EXIT_FAILURE);
619	}	719	}
620		720
621	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	721	stack_start = cctx->sptr;
622		722	stack_size = cctx->ssize;
623	#else
624
625	stack->ssize = STACKSIZE * (long)sizeof (long);
626	New (0, stack->sptr, STACKSIZE, long);
627
628	if (!stack->sptr)
629	{	723	}
630	perror (stderr, "FATAL: unable to malloc stack for coroutine");
631	_exit (EXIT_FAILURE);
632	}
633		724
634	#endif	725	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
635
636	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	726	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
637		727
638	return stack;	728	return cctx;
639	}	729	}
640		730
641	static void	731	static void
642	stack_free (coro_stack *stack)	732	cctx_destroy (coro_cctx *cctx)
643	{	733	{
644	if (!stack || stack == main_stack)	734	if (!cctx)
645	return;	735	return;
646		736
		737	--cctx_count;
		738
		739	#if CORO_USE_VALGRIND
		740	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		741	#endif
		742
647	#if HAVE_MMAP	743	#if HAVE_MMAP
		744	if (cctx->mapped)
648	munmap (stack->sptr, stack->ssize);	745	munmap (cctx->sptr, cctx->ssize);
649	#else
650	Safefree (stack->sptr);
651	#endif
652
653	Safefree (stack);
654	}
655
656	static coro_stack *stack_first;
657
658	static coro_stack *
659	stack_get ()
660	{
661	coro_stack *stack;
662
663	if (stack_first)
664	{
665	stack = stack_first;
666	stack_first = stack->next;
667	}
668	else	746	else
		747	#endif
		748	Safefree (cctx->sptr);
		749
		750	Safefree (cctx);
		751	}
		752
		753	static coro_cctx *
		754	cctx_get (pTHX)
		755	{
		756	while (cctx_first)
669	{	757	{
670	stack = stack_new ();	758	coro_cctx *cctx = cctx_first;
		759	cctx_first = cctx->next;
		760	--cctx_idle;
		761
		762	if (cctx->ssize >= coro_stacksize)
		763	return cctx;
		764
		765	cctx_destroy (cctx);
		766	}
		767
671	PL_op = PL_op->op_next;	768	PL_op = PL_op->op_next;
		769	return cctx_new ();
		770	}
		771
		772	static void
		773	cctx_put (coro_cctx *cctx)
		774	{
		775	/* free another cctx if overlimit */
		776	if (cctx_idle >= MAX_IDLE_CCTX)
		777	{
		778	coro_cctx *first = cctx_first;
		779	cctx_first = first->next;
		780	--cctx_idle;
		781
		782	assert (!first->inuse);
		783	cctx_destroy (first);
672	}	784	}
673		785
674	return stack;	786	++cctx_idle;
		787	cctx->next = cctx_first;
		788	cctx_first = cctx;
675	}	789	}
676		790
677	static void	791	/** coroutine switching *****************************************************/
678	stack_put (coro_stack *stack)
679	{
680	stack->next = stack_first;
681	stack_first = stack;
682	}
683		792
684	/* never call directly, always through the coro_state_transfer global variable */	793	/* never call directly, always through the coro_state_transfer global variable */
685	static void	794	static void NOINLINE
686	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	795	transfer (pTHX_ struct coro *prev, struct coro *next)
687	{	796	{
688	dSTACKLEVEL;	797	dSTACKLEVEL;
689		798
690	/* sometimes transfer is only called to set idle_sp */	799	/* sometimes transfer is only called to set idle_sp */
691	if (flags == TRANSFER_SET_STACKLEVEL)	800	if (!next)
		801	{
692	((coro_stack *)prev)->idle_sp = STACKLEVEL;	802	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		803	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		804	}
693	else if (prev != next)	805	else if (prev != next)
694	{	806	{
695	coro_stack *prev__stack;	807	coro_cctx *prev__cctx;
		808
		809	if (prev->flags & CF_NEW)
		810	{
		811	/* create a new empty context */
		812	Newz (0, prev->cctx, 1, coro_cctx);
		813	prev->cctx->inuse = 1;
		814	prev->flags &= ~CF_NEW;
		815	prev->flags |= CF_RUNNING;
		816	}
		817
		818	/*TODO: must not croak here */
		819	if (!prev->flags & CF_RUNNING)
		820	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		821
		822	if (next->flags & CF_RUNNING)
		823	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		824
		825	if (next->flags & CF_DESTROYED)
		826	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		827
		828	prev->flags &= ~CF_RUNNING;
		829	next->flags |= CF_RUNNING;
696		830
697	LOCK;	831	LOCK;
698		832
699	if (next->mainstack)	833	if (next->flags & CF_NEW)
700	{	834	{
701	/* coroutine already started */	835	/* need to start coroutine */
702	SAVE (prev, flags);	836	next->flags &= ~CF_NEW;
703	LOAD (next);	837	/* first get rid of the old state */
		838	save_perl (aTHX_ prev);
		839	/* setup coroutine call */
		840	setup_coro (aTHX_ next);
		841	/* need a new stack */
		842	assert (!next->cctx);
704	}	843	}
705	else	844	else
706	{	845	{
707	/* need to start coroutine */	846	/* coroutine already started */
708	/* first get rid of the old state */	847	save_perl (aTHX_ prev);
709	SAVE (prev, -1);	848	load_perl (aTHX_ next);
710	/* setup coroutine call */
711	setup_coro (next);
712	/* need a stack */
713	next->stack = 0;
714	}	849	}
715		850
716	prev__stack = prev->stack;	851	prev__cctx = prev->cctx;
717		852
718	/* possibly "free" the stack */	853	/* possibly "free" the cctx */
719	if (prev__stack->idle_sp == STACKLEVEL)	854	if (prev__cctx->idle_sp == STACKLEVEL)
720	{	855	{
721	stack_put (prev__stack);	856	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		857	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		858
722	prev->stack = 0;	859	prev->cctx = 0;
		860
		861	cctx_put (prev__cctx);
		862	prev__cctx->inuse = 0;
723	}	863	}
724		864
725	if (!next->stack)	865	if (!next->cctx)
726	next->stack = stack_get ();
727
728	if (prev__stack != next->stack)
729	{	866	{
730	prev__stack->top_env = PL_top_env;	867	next->cctx = cctx_get (aTHX);
731	PL_top_env = next->stack->top_env;	868	assert (!next->cctx->inuse);
732	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	869	next->cctx->inuse = 1;
733	}	870	}
734		871
		872	if (prev__cctx != next->cctx)
		873	{
		874	prev__cctx->top_env = PL_top_env;
		875	PL_top_env = next->cctx->top_env;
		876	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		877	}
		878
735	free_coro_mortal ();	879	free_coro_mortal (aTHX);
736
737	UNLOCK;	880	UNLOCK;
738	}	881	}
739	}	882	}
740		883
741	/* use this function pointer to call the above function */
742	/* this is done to increase chances of the compiler not inlining the call */
743	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
744	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
745
746	struct transfer_args	884	struct transfer_args
747	{	885	{
748	struct coro *prev, *next;	886	struct coro *prev, *next;
749	int flags;
750	};	887	};
751		888
752	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	889	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
753		890
		891	/** high level stuff ********************************************************/
		892
754	static void	893	static int
755	coro_state_destroy (struct coro *coro)	894	coro_state_destroy (pTHX_ struct coro *coro)
756	{	895	{
757	if (coro->refcnt--)	896	if (coro->flags & CF_DESTROYED)
758	return;	897	return 0;
		898
		899	coro->flags |= CF_DESTROYED;
		900
		901	if (coro->flags & CF_READY)
		902	{
		903	/* reduce nready, as destroying a ready coro effectively unreadies it */
		904	/* alternative: look through all ready queues and remove the coro */
		905	LOCK;
		906	--coro_nready;
		907	UNLOCK;
		908	}
		909	else
		910	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
759		911
760	if (coro->mainstack && coro->mainstack != main_mainstack)	912	if (coro->mainstack && coro->mainstack != main_mainstack)
761	{	913	{
762	struct coro temp;	914	struct coro temp;
763		915
764	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	916	assert (!(coro->flags & CF_RUNNING));
		917
		918	Zero (&temp, 1, struct coro);
		919	temp.save = CORO_SAVE_ALL;
		920
		921	if (coro->flags & CF_RUNNING)
		922	croak ("FATAL: tried to destroy currently running coroutine");
		923
		924	save_perl (aTHX_ &temp);
765	LOAD (aTHX_ coro);	925	load_perl (aTHX_ coro);
766		926
767	destroy_stacks (aTHX);	927	coro_destroy_stacks (aTHX);
768		928
769	LOAD ((&temp)); /* this will get rid of defsv etc.. */	929	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
770		930
771	coro->mainstack = 0;	931	coro->mainstack = 0;
772	}	932	}
773		933
774	stack_free (coro->stack);	934	cctx_destroy (coro->cctx);
775	SvREFCNT_dec (coro->args);	935	SvREFCNT_dec (coro->args);
776	Safefree (coro);	936
		937	if (coro->next) coro->next->prev = coro->prev;
		938	if (coro->prev) coro->prev->next = coro->next;
		939	if (coro == coro_first) coro_first = coro->next;
		940
		941	return 1;
777	}	942	}
778		943
779	static int	944	static int
780	coro_state_clear (SV *sv, MAGIC *mg)	945	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
781	{	946	{
782	struct coro *coro = (struct coro *)mg->mg_ptr;	947	struct coro *coro = (struct coro *)mg->mg_ptr;
783	mg->mg_ptr = 0;	948	mg->mg_ptr = 0;
784		949
		950	coro->hv = 0;
		951
		952	if (--coro->refcnt < 0)
		953	{
785	coro_state_destroy (coro);	954	coro_state_destroy (aTHX_ coro);
		955	Safefree (coro);
		956	}
786		957
787	return 0;	958	return 0;
788	}	959	}
789		960
790	static int	961	static int
791	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	962	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
792	{	963	{
793	struct coro *coro = (struct coro *)mg->mg_ptr;	964	struct coro *coro = (struct coro *)mg->mg_ptr;
794		965
795	++coro->refcnt;	966	++coro->refcnt;
796		967
797	return 0;	968	return 0;
798	}	969	}
799		970
800	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	971	static MGVTBL coro_state_vtbl = {
		972	0, 0, 0, 0,
		973	coro_state_free,
		974	0,
		975	#ifdef MGf_DUP
		976	coro_state_dup,
		977	#else
		978	# define MGf_DUP 0
		979	#endif
		980	};
801		981
802	static struct coro *	982	static struct coro *
803	SvSTATE (SV *coro)	983	SvSTATE_ (pTHX_ SV *coro)
804	{	984	{
805	HV *stash;	985	HV *stash;
806	MAGIC *mg;	986	MAGIC *mg;
807		987
808	if (SvROK (coro))	988	if (SvROK (coro))
…		…
814	/* very slow, but rare, check */	994	/* very slow, but rare, check */
815	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	995	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
816	croak ("Coro::State object required");	996	croak ("Coro::State object required");
817	}	997	}
818		998
819	mg = SvMAGIC (coro);	999	mg = CORO_MAGIC (coro);
820	assert (mg->mg_type == PERL_MAGIC_ext);
821	return (struct coro *)mg->mg_ptr;	1000	return (struct coro *)mg->mg_ptr;
822	}	1001	}
823		1002
		1003	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1004
824	static void	1005	static void
825	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	1006	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
826	{	1007	{
827	ta->prev = SvSTATE (prev);	1008	ta->prev = SvSTATE (prev_sv);
828	ta->next = SvSTATE (next);	1009	ta->next = SvSTATE (next_sv);
829	ta->flags = flags;
830	}	1010	}
831		1011
832	static void	1012	static void
833	api_transfer (SV *prev, SV *next, int flags)	1013	api_transfer (SV *prev_sv, SV *next_sv)
834	{	1014	{
835	dTHX;	1015	dTHX;
836	struct transfer_args ta;	1016	struct transfer_args ta;
837		1017
838	prepare_transfer (aTHX_ &ta, prev, next, flags);	1018	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
839	TRANSFER (ta);	1019	TRANSFER (ta);
840	}	1020	}
841		1021
		1022	static int
		1023	api_save (SV *coro_sv, int new_save)
		1024	{
		1025	dTHX;
		1026	struct coro *coro = SvSTATE (coro_sv);
		1027	int old_save = coro->save;
		1028
		1029	if (new_save >= 0)
		1030	coro->save = new_save;
		1031
		1032	return old_save;
		1033	}
		1034
842	/** Coro ********************************************************************/	1035	/** Coro ********************************************************************/
843		1036
844	#define PRIO_MAX 3
845	#define PRIO_HIGH 1
846	#define PRIO_NORMAL 0
847	#define PRIO_LOW -1
848	#define PRIO_IDLE -3
849	#define PRIO_MIN -4
850
851	/* for Coro.pm */
852	static GV *coro_current, *coro_idle;
853	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
854	static int coro_nready;
855
856	static void	1037	static void
857	coro_enq (pTHX_ SV *sv)	1038	coro_enq (pTHX_ SV *coro_sv)
858	{	1039	{
859	int prio;
860
861	if (SvTYPE (sv) != SVt_PVHV)
862	croak ("Coro::ready tried to enqueue something that is not a coroutine");
863
864	prio = SvSTATE (sv)->prio;
865
866	av_push (coro_ready [prio - PRIO_MIN], sv);	1040	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
867	coro_nready++;
868	}	1041	}
869		1042
870	static SV *	1043	static SV *
871	coro_deq (pTHX_ int min_prio)	1044	coro_deq (pTHX_ int min_prio)
872	{	1045	{
…		…
876	if (min_prio < 0)	1049	if (min_prio < 0)
877	min_prio = 0;	1050	min_prio = 0;
878		1051
879	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1052	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
880	if (AvFILLp (coro_ready [prio]) >= 0)	1053	if (AvFILLp (coro_ready [prio]) >= 0)
881	{
882	coro_nready--;
883	return av_shift (coro_ready [prio]);	1054	return av_shift (coro_ready [prio]);
884	}
885		1055
886	return 0;	1056	return 0;
887	}	1057	}
888		1058
889	static void	1059	static int
890	api_ready (SV *coro)	1060	api_ready (SV *coro_sv)
891	{	1061	{
892	dTHX;	1062	dTHX;
		1063	struct coro *coro;
893		1064
894	if (SvROK (coro))	1065	if (SvROK (coro_sv))
895	coro = SvRV (coro);	1066	coro_sv = SvRV (coro_sv);
		1067
		1068	coro = SvSTATE (coro_sv);
		1069
		1070	if (coro->flags & CF_READY)
		1071	return 0;
		1072
		1073	coro->flags |= CF_READY;
896		1074
897	LOCK;	1075	LOCK;
898	coro_enq (aTHX_ SvREFCNT_inc (coro));	1076	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1077	++coro_nready;
899	UNLOCK;	1078	UNLOCK;
900	}
901		1079
		1080	return 1;
		1081	}
		1082
902	static void	1083	static int
		1084	api_is_ready (SV *coro_sv)
		1085	{
		1086	dTHX;
		1087	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1088	}
		1089
		1090	static void
903	prepare_schedule (aTHX_ struct transfer_args *ta)	1091	prepare_schedule (pTHX_ struct transfer_args *ta)
904	{	1092	{
905	SV *current, *prev, *next;	1093	SV *prev_sv, *next_sv;
		1094
		1095	for (;;)
		1096	{
		1097	LOCK;
		1098	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1099
		1100	/* nothing to schedule: call the idle handler */
		1101	if (!next_sv)
		1102	{
		1103	dSP;
		1104	UNLOCK;
		1105
		1106	ENTER;
		1107	SAVETMPS;
		1108
		1109	PUSHMARK (SP);
		1110	PUTBACK;
		1111	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1112
		1113	FREETMPS;
		1114	LEAVE;
		1115	continue;
		1116	}
		1117
		1118	ta->next = SvSTATE (next_sv);
		1119
		1120	/* cannot transfer to destroyed coros, skip and look for next */
		1121	if (ta->next->flags & CF_DESTROYED)
		1122	{
		1123	UNLOCK;
		1124	SvREFCNT_dec (next_sv);
		1125	/* coro_nready is already taken care of by destroy */
		1126	continue;
		1127	}
		1128
		1129	--coro_nready;
		1130	UNLOCK;
		1131	break;
		1132	}
		1133
		1134	/* free this only after the transfer */
		1135	prev_sv = SvRV (coro_current);
		1136	SvRV_set (coro_current, next_sv);
		1137	ta->prev = SvSTATE (prev_sv);
		1138
		1139	assert (ta->next->flags & CF_READY);
		1140	ta->next->flags &= ~CF_READY;
906		1141
907	LOCK;	1142	LOCK;
908
909	current = GvSV (coro_current);
910
911	for (;;)
912	{
913	LOCK;
914
915	next = coro_deq (aTHX_ PRIO_MIN);
916
917	if (next)
918	break;
919
920	UNLOCK;
921
922	{
923	dSP;
924
925	ENTER;
926	SAVETMPS;
927
928	PUSHMARK (SP);
929	PUTBACK;
930	call_sv (GvSV (coro_idle), G_DISCARD);
931
932	FREETMPS;
933	LEAVE;
934	}
935	}
936
937	prev = SvRV (current);
938	SvRV (current) = next;
939
940	/* free this only after the transfer */
941	free_coro_mortal ();	1143	free_coro_mortal (aTHX);
942	coro_mortal = prev;	1144	coro_mortal = prev_sv;
943
944	ta->prev = SvSTATE (prev);
945	ta->next = SvSTATE (next);
946	ta->flags = TRANSFER_SAVE_ALL;
947
948	UNLOCK;	1145	UNLOCK;
949	}	1146	}
950		1147
951	static void	1148	static void
952	prepare_cede (aTHX_ struct transfer_args *ta)	1149	prepare_cede (pTHX_ struct transfer_args *ta)
953	{	1150	{
954	LOCK;	1151	api_ready (coro_current);
955	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
956	UNLOCK;
957
958	prepare_schedule (ta);	1152	prepare_schedule (aTHX_ ta);
		1153	}
		1154
		1155	static int
		1156	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1157	{
		1158	if (coro_nready)
		1159	{
		1160	SV *prev = SvRV (coro_current);
		1161	prepare_schedule (aTHX_ ta);
		1162	api_ready (prev);
		1163	return 1;
		1164	}
		1165	else
		1166	return 0;
959	}	1167	}
960		1168
961	static void	1169	static void
962	api_schedule (void)	1170	api_schedule (void)
963	{	1171	{
964	dTHX;	1172	dTHX;
965	struct transfer_args ta;	1173	struct transfer_args ta;
966		1174
967	prepare_schedule (&ta);	1175	prepare_schedule (aTHX_ &ta);
968	TRANSFER (ta);	1176	TRANSFER (ta);
969	}	1177	}
970		1178
971	static void	1179	static int
972	api_cede (void)	1180	api_cede (void)
973	{	1181	{
974	dTHX;	1182	dTHX;
975	struct transfer_args ta;	1183	struct transfer_args ta;
976		1184
977	prepare_cede (&ta);	1185	prepare_cede (aTHX_ &ta);
		1186
		1187	if (ta.prev != ta.next)
		1188	{
978	TRANSFER (ta);	1189	TRANSFER (ta);
		1190	return 1;
		1191	}
		1192	else
		1193	return 0;
		1194	}
		1195
		1196	static int
		1197	api_cede_notself (void)
		1198	{
		1199	dTHX;
		1200	struct transfer_args ta;
		1201
		1202	if (prepare_cede_notself (aTHX_ &ta))
		1203	{
		1204	TRANSFER (ta);
		1205	return 1;
		1206	}
		1207	else
		1208	return 0;
979	}	1209	}
980		1210
981	MODULE = Coro::State PACKAGE = Coro::State	1211	MODULE = Coro::State PACKAGE = Coro::State
982		1212
983	PROTOTYPES: DISABLE	1213	PROTOTYPES: DISABLE
…		…
989	#endif	1219	#endif
990	BOOT_PAGESIZE;	1220	BOOT_PAGESIZE;
991		1221
992	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1222	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
993		1223
994	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1224	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
995	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1225	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
996	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1226	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1227	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1228	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1229	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1230	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
997		1231
998	main_mainstack = PL_mainstack;	1232	main_mainstack = PL_mainstack;
		1233	main_top_env = PL_top_env;
		1234
		1235	while (main_top_env->je_prev)
		1236	main_top_env = main_top_env->je_prev;
999		1237
1000	coroapi.ver = CORO_API_VERSION;	1238	coroapi.ver = CORO_API_VERSION;
1001	coroapi.transfer = api_transfer;	1239	coroapi.transfer = api_transfer;
1002
1003	Newz (0, main_stack, 1, coro_stack);
1004	main_stack->idle_sp = (void *)-1;
1005		1240
1006	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1241	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1007	}	1242	}
1008		1243
1009	SV *	1244	SV *
…		…
1014	HV *hv;	1249	HV *hv;
1015	int i;	1250	int i;
1016		1251
1017	Newz (0, coro, 1, struct coro);	1252	Newz (0, coro, 1, struct coro);
1018	coro->args = newAV ();	1253	coro->args = newAV ();
		1254	coro->save = CORO_SAVE_DEF;
		1255	coro->flags = CF_NEW;
1019		1256
		1257	if (coro_first) coro_first->prev = coro;
		1258	coro->next = coro_first;
		1259	coro_first = coro;
		1260
1020	hv = newHV ();	1261	coro->hv = hv = newHV ();
1021	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1262	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1022	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1263	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1023		1264
1024	for (i = 1; i < items; i++)	1265	for (i = 1; i < items; i++)
1025	av_push (coro->args, newSVsv (ST (i)));	1266	av_push (coro->args, newSVsv (ST (i)));
1026
1027	coro->stack = main_stack;
1028	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1029	/*coro->stack = 0;*/
1030	}	1267	}
1031	OUTPUT:	1268	OUTPUT:
1032	RETVAL	1269	RETVAL
1033		1270
		1271	int
		1272	save (SV *coro, int new_save = -1)
		1273	CODE:
		1274	RETVAL = api_save (coro, new_save);
		1275	OUTPUT:
		1276	RETVAL
		1277
		1278	int
		1279	save_also (SV *coro_sv, int save_also)
		1280	CODE:
		1281	{
		1282	struct coro *coro = SvSTATE (coro_sv);
		1283	RETVAL = coro->save;
		1284	coro->save |= save_also;
		1285	}
		1286	OUTPUT:
		1287	RETVAL
		1288
1034	void	1289	void
1035	transfer (...)	1290	_set_stacklevel (...)
1036	ALIAS:	1291	ALIAS:
1037	Coro::schedule = 1	1292	Coro::State::transfer = 1
1038	Coro::cede = 2	1293	Coro::schedule = 2
1039	_set_stacklevel = 3	1294	Coro::cede = 3
		1295	Coro::cede_notself = 4
1040	CODE:	1296	CODE:
1041	{	1297	{
1042	struct transfer_args ta;	1298	struct transfer_args ta;
1043		1299
1044	switch (ix)	1300	switch (ix)
1045	{	1301	{
1046	case 0:	1302	case 0:
1047	if (items != 3)	1303	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1048	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1304	ta.next = 0;
1049
1050	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1051	break;	1305	break;
1052		1306
1053	case 1:	1307	case 1:
1054	prepare_schedule (&ta);	1308	if (items != 2)
		1309	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1310
		1311	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1055	break;	1312	break;
1056		1313
1057	case 2:	1314	case 2:
1058	prepare_cede (&ta);	1315	prepare_schedule (aTHX_ &ta);
1059	break;	1316	break;
1060		1317
1061	case 3:	1318	case 3:
1062	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1319	prepare_cede (aTHX_ &ta);
1063	ta.next = 0;	1320	break;
1064	ta.flags = TRANSFER_SET_STACKLEVEL;	1321
		1322	case 4:
		1323	if (!prepare_cede_notself (aTHX_ &ta))
		1324	XSRETURN_EMPTY;
		1325
1065	break;	1326	break;
1066	}	1327	}
1067		1328
		1329	BARRIER;
1068	TRANSFER (ta);	1330	TRANSFER (ta);
1069	}
1070		1331
1071	void	1332	if (GIMME_V != G_VOID && ta.next != ta.prev)
1072	_clone_state_from (SV *dst, SV *src)	1333	XSRETURN_YES;
		1334	}
		1335
		1336	bool
		1337	_destroy (SV *coro_sv)
1073	CODE:	1338	CODE:
1074	{	1339	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1075	struct coro *coro_src = SvSTATE (src);	1340	OUTPUT:
1076		1341	RETVAL
1077	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1078
1079	++coro_src->refcnt;
1080	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1081	}
1082
1083	void
1084	_nonlocal_goto (IV nextop)
1085	CODE:
1086	/* uuh, somebody will kill me again for this */
1087	PL_op->op_next = INT2PTR (OP *, nextop);
1088		1342
1089	void	1343	void
1090	_exit (code)	1344	_exit (code)
1091	int code	1345	int code
1092	PROTOTYPE: $	1346	PROTOTYPE: $
1093	CODE:	1347	CODE:
1094	_exit (code);	1348	_exit (code);
1095		1349
1096	MODULE = Coro::State PACKAGE = Coro::Cont	1350	int
		1351	cctx_stacksize (int new_stacksize = 0)
		1352	CODE:
		1353	RETVAL = coro_stacksize;
		1354	if (new_stacksize)
		1355	coro_stacksize = new_stacksize;
		1356	OUTPUT:
		1357	RETVAL
		1358
		1359	int
		1360	cctx_count ()
		1361	CODE:
		1362	RETVAL = cctx_count;
		1363	OUTPUT:
		1364	RETVAL
		1365
		1366	int
		1367	cctx_idle ()
		1368	CODE:
		1369	RETVAL = cctx_idle;
		1370	OUTPUT:
		1371	RETVAL
1097		1372
1098	void	1373	void
1099	yield (...)	1374	list ()
1100	PROTOTYPE: @	1375	PPCODE:
		1376	{
		1377	struct coro *coro;
		1378	for (coro = coro_first; coro; coro = coro->next)
		1379	if (coro->hv)
		1380	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1381	}
		1382
		1383	void
		1384	_eval (Coro::State coro, SV *coderef)
		1385	CODE:
		1386	{
		1387	if (coro->mainstack)
		1388	{
		1389	struct coro temp;
		1390	Zero (&temp, 1, struct coro);
		1391	temp.save = CORO_SAVE_ALL;
		1392
		1393	if (!(coro->flags & CF_RUNNING))
		1394	{
		1395	save_perl (aTHX_ &temp);
		1396	load_perl (aTHX_ coro);
		1397	}
		1398
		1399	{
		1400	dSP;
		1401	ENTER;
		1402	SAVETMPS;
		1403	PUSHMARK (SP);
		1404	PUTBACK;
		1405	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1406	SPAGAIN;
		1407	FREETMPS;
		1408	LEAVE;
		1409	PUTBACK;
		1410	}
		1411
		1412	if (!(coro->flags & CF_RUNNING))
		1413	{
		1414	save_perl (aTHX_ coro);
		1415	load_perl (aTHX_ &temp);
		1416	}
		1417	}
		1418	}
		1419
		1420	SV *
		1421	is_ready (Coro::State coro)
		1422	PROTOTYPE: $
		1423	ALIAS:
		1424	is_ready = CF_READY
		1425	is_running = CF_RUNNING
		1426	is_new = CF_NEW
		1427	is_destroyed = CF_DESTROYED
		1428	CODE:
		1429	RETVAL = boolSV (coro->flags & ix);
		1430	OUTPUT:
		1431	RETVAL
		1432
		1433	SV *
		1434	has_stack (Coro::State coro)
		1435	PROTOTYPE: $
		1436	CODE:
		1437	RETVAL = boolSV (!!coro->cctx);
		1438	OUTPUT:
		1439	RETVAL
		1440
		1441	IV
		1442	rss (Coro::State coro)
		1443	PROTOTYPE: $
1101	CODE:	1444	CODE:
1102	{	1445	RETVAL = coro_rss (coro);
1103	SV *yieldstack;	1446	OUTPUT:
1104	SV *sv;	1447	RETVAL
1105	AV *defav = GvAV (PL_defgv);
1106	struct coro *prev, *next;
1107		1448
1108	yieldstack = *hv_fetch (
1109	(HV *)SvRV (GvSV (coro_current)),
1110	"yieldstack", sizeof ("yieldstack") - 1,
1111	0
1112	);
1113
1114	/* set up @_ -- ugly */
1115	av_clear (defav);
1116	av_fill (defav, items - 1);
1117	while (items--)
1118	av_store (defav, items, SvREFCNT_inc (ST(items)));
1119
1120	sv = av_pop ((AV *)SvRV (yieldstack));
1121	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1122	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1123	SvREFCNT_dec (sv);
1124
1125	coro_state_transfer (aTHX_ prev, next, 0);
1126	}
1127		1449
1128	MODULE = Coro::State PACKAGE = Coro	1450	MODULE = Coro::State PACKAGE = Coro
1129		1451
1130	BOOT:	1452	BOOT:
1131	{	1453	{
1132	int i;	1454	int i;
		1455
		1456	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1457	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1458	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1459
		1460	coro_current = get_sv ("Coro::current", FALSE);
		1461	SvREADONLY_on (coro_current);
1133		1462
1134	coro_stash = gv_stashpv ("Coro", TRUE);	1463	coro_stash = gv_stashpv ("Coro", TRUE);
1135		1464
1136	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1465	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1137	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1466	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1138	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1467	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1139	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1468	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1140	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1469	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1141	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1470	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1142		1471
1143	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1144	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1145
1146	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1472	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1147	coro_ready[i] = newAV ();	1473	coro_ready[i] = newAV ();
1148		1474
1149	{	1475	{
1150	SV *sv = perl_get_sv("Coro::API", 1);	1476	SV *sv = perl_get_sv("Coro::API", 1);
1151		1477
1152	coroapi.schedule = api_schedule;	1478	coroapi.schedule = api_schedule;
		1479	coroapi.save = api_save;
1153	coroapi.cede = api_cede;	1480	coroapi.cede = api_cede;
		1481	coroapi.cede_notself = api_cede_notself;
1154	coroapi.ready = api_ready;	1482	coroapi.ready = api_ready;
		1483	coroapi.is_ready = api_is_ready;
1155	coroapi.nready = &coro_nready;	1484	coroapi.nready = &coro_nready;
1156	coroapi.current = coro_current;	1485	coroapi.current = coro_current;
1157		1486
1158	GCoroAPI = &coroapi;	1487	GCoroAPI = &coroapi;
1159	sv_setiv (sv, (IV)&coroapi);	1488	sv_setiv (sv, (IV)&coroapi);
1160	SvREADONLY_on (sv);	1489	SvREADONLY_on (sv);
1161	}	1490	}
1162	}	1491	}
		1492
		1493	void
		1494	_set_current (SV *current)
		1495	PROTOTYPE: $
		1496	CODE:
		1497	SvREFCNT_dec (SvRV (coro_current));
		1498	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1163		1499
1164	int	1500	int
1165	prio (Coro::State coro, int newprio = 0)	1501	prio (Coro::State coro, int newprio = 0)
1166	ALIAS:	1502	ALIAS:
1167	nice = 1	1503	nice = 1
…		…
1170	RETVAL = coro->prio;	1506	RETVAL = coro->prio;
1171		1507
1172	if (items > 1)	1508	if (items > 1)
1173	{	1509	{
1174	if (ix)	1510	if (ix)
1175	newprio += coro->prio;	1511	newprio = coro->prio - newprio;
1176		1512
1177	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1513	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1178	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1514	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1179		1515
1180	coro->prio = newprio;	1516	coro->prio = newprio;
1181	}	1517	}
1182	}	1518	}
		1519	OUTPUT:
		1520	RETVAL
1183		1521
1184	void	1522	SV *
1185	ready (SV *self)	1523	ready (SV *self)
1186	PROTOTYPE: $	1524	PROTOTYPE: $
1187	CODE:	1525	CODE:
1188	api_ready (self);	1526	RETVAL = boolSV (api_ready (self));
		1527	OUTPUT:
		1528	RETVAL
1189		1529
1190	int	1530	int
1191	nready (...)	1531	nready (...)
1192	PROTOTYPE:	1532	PROTOTYPE:
1193	CODE:	1533	CODE:
1194	RETVAL = coro_nready;	1534	RETVAL = coro_nready;
1195	OUTPUT:	1535	OUTPUT:
1196	RETVAL	1536	RETVAL
1197		1537
		1538	# for async_pool speedup
		1539	void
		1540	_pool_1 (SV *cb)
		1541	CODE:
		1542	{
		1543	int i, len;
		1544	HV *hv = (HV *)SvRV (coro_current);
		1545	AV *defav = GvAV (PL_defgv);
		1546	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1547	AV *invoke_av;
		1548
		1549	if (!invoke)
		1550	croak ("\3terminate\2\n");
		1551
		1552	hv_store (hv, "desc", sizeof ("desc") - 1,
		1553	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1554
		1555	invoke_av = (AV *)SvRV (invoke);
		1556	len = av_len (invoke_av);
		1557
		1558	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1559
		1560	if (len > 0)
		1561	{
		1562	av_fill (defav, len - 1);
		1563	for (i = 0; i < len; ++i)
		1564	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1565	}
		1566
		1567	SvREFCNT_dec (invoke);
		1568	}
		1569
		1570	void
		1571	_pool_2 (SV *cb)
		1572	CODE:
		1573	{
		1574	struct coro *coro = SvSTATE (coro_current);
		1575
		1576	sv_setsv (cb, &PL_sv_undef);
		1577
		1578	if (coro_rss (coro) > SvIV (sv_pool_rss)
		1579	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1580	croak ("\3terminate\2\n");
		1581
		1582	av_clear (GvAV (PL_defgv));
		1583	hv_store (SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1584	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1585	coro->save = CORO_SAVE_DEF;
		1586	coro->prio = 0;
		1587	av_push (av_async_pool, newSVsv (coro_current));
		1588	}
		1589
		1590
1198	MODULE = Coro::State PACKAGE = Coro::AIO	1591	MODULE = Coro::State PACKAGE = Coro::AIO
1199		1592
1200	SV *	1593	SV *
1201	_get_state ()	1594	_get_state ()
1202	CODE:	1595	CODE:
1203	{	1596	{
1204	struct {	1597	struct io_state *data;
1205	int errorno;
1206	int laststype;
1207	int laststatval;
1208	Stat_t statcache;
1209	} data;
1210		1598
		1599	RETVAL = newSV (sizeof (struct io_state));
		1600	data = (struct io_state *)SvPVX (RETVAL);
		1601	SvCUR_set (RETVAL, sizeof (struct io_state));
		1602	SvPOK_only (RETVAL);
		1603
1211	data.errorno = errno;	1604	data->errorno = errno;
1212	data.laststype = PL_laststype;	1605	data->laststype = PL_laststype;
1213	data.laststatval = PL_laststatval;	1606	data->laststatval = PL_laststatval;
1214	data.statcache = PL_statcache;	1607	data->statcache = PL_statcache;
1215
1216	RETVAL = newSVpvn ((char *)&data, sizeof data);
1217	}	1608	}
1218	OUTPUT:	1609	OUTPUT:
1219	RETVAL	1610	RETVAL
1220		1611
1221	void	1612	void
1222	_set_state (char *data_)	1613	_set_state (char *data_)
1223	PROTOTYPE: $	1614	PROTOTYPE: $
1224	CODE:	1615	CODE:
1225	{	1616	{
1226	struct {	1617	struct io_state *data = (void *)data_;
1227	int errorno;
1228	int laststype;
1229	int laststatval;
1230	Stat_t statcache;
1231	} *data = (void *)data_;
1232		1618
1233	errno = data->errorno;	1619	errno = data->errorno;
1234	PL_laststype = data->laststype;	1620	PL_laststype = data->laststype;
1235	PL_laststatval = data->laststatval;	1621	PL_laststatval = data->laststatval;
1236	PL_statcache = data->statcache;	1622	PL_statcache = data->statcache;
1237	}	1623	}
		1624

Diff Legend

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