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Comparing Coro/Coro/State.xs (file contents):
Revision 1.89 by root, Sat Nov 25 00:40:26 2006 UTC vs.
Revision 1.167 by root, Thu Sep 27 15:52:31 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <errno.h>	75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
33		79
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	81	# undef CORO_STACKGUARD
36	#endif
37
38	#ifndef STACKGUARD
39	# define STACKGUARD 0
40	#endif
41
42	#ifdef HAVE_MMAP
43	# include <unistd.h>
44	# include <sys/mman.h>
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	82	#endif
52	# include <limits.h>	83
53	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	86	#endif
60	#endif
61		87
62	#define SUB_INIT "Coro::State::initialize"	88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
63		92
64	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macros try to return the current stack pointer, in an as
65	* to the current C stack pointer. Its property is that it changes with each call	94	* portable way as possible. */
66	* and should be unique. */	95	#define dSTACKLEVEL volatile char stacklevel
67	#define dSTACKLEVEL void *stacklevel = &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		111
75	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
…		…
79	#else	116	#else
80	# define LOCK (void)0	117	# define LOCK (void)0
81	# define UNLOCK (void)0	118	# define UNLOCK (void)0
82	#endif	119	#endif
83		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;
84	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
85	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;
86	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
88		136
89	/* this is actually not just the c stack but also c registers etc... */	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
		145	enum {
		146	CC_MAPPED = 0x01,
		147	CC_NOREUSE = 0x02, /* throw this away after tracing */
		148	CC_TRACE = 0x04,
		149	CC_TRACE_SUB = 0x08, /* trace sub calls */
		150	CC_TRACE_LINE = 0x10, /* trace each statement */
		151	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		152	};
		153
		154	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	155	typedef struct coro_cctx {
91	struct coro_stack *next;	156	struct coro_cctx *next;
92		157
93	void *idle_sp;	158	/* the stack */
94	void *sptr;	159	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	160	size_t ssize;
96		161
97	/* cpu state */	162	/* cpu state */
		163	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		164	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		165	JMPENV *top_env;
98	coro_context cctx;	166	coro_context cctx;
99	} coro_stack;
100		167
101	static coro_stack *main_stack;	168	#if CORO_USE_VALGRIND
		169	int valgrind_id;
		170	#endif
		171	unsigned char flags;
		172	} coro_cctx;
102		173
		174	enum {
		175	CF_RUNNING = 0x0001, /* coroutine is running */
		176	CF_READY = 0x0002, /* coroutine is ready */
		177	CF_NEW = 0x0004, /* has never been switched to */
		178	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		179	};
		180
		181	/* this is a structure representing a perl-level coroutine */
103	struct coro {	182	struct coro {
104	/* optionally saved, might be zero */	183	/* the c coroutine allocated to this perl coroutine, if any */
105	AV *defav;	184	coro_cctx *cctx;
106	SV *defsv;
107	SV *errsv;
108
109	/* saved global state not related to stacks */
110	U8 dowarn;
111	I32 in_eval;
112
113	/* the c stack, if any */
114	coro_stack *stack;
115
116	/* the stacks and related info (callchain etc..) */
117	PERL_SI *curstackinfo;
118	AV *curstack;
119	AV *mainstack;
120	SV **stack_sp;
121	OP *op;
122	SV **curpad;
123	AV *comppad;
124	CV *compcv;
125	SV **stack_base;
126	SV **stack_max;
127	SV **tmps_stack;
128	I32 tmps_floor;
129	I32 tmps_ix;
130	I32 tmps_max;
131	I32 *markstack;
132	I32 *markstack_ptr;
133	I32 *markstack_max;
134	I32 *scopestack;
135	I32 scopestack_ix;
136	I32 scopestack_max;
137	ANY *savestack;
138	I32 savestack_ix;
139	I32 savestack_max;
140	OP **retstack;
141	I32 retstack_ix;
142	I32 retstack_max;
143	PMOP *curpm;
144	COP *curcop;
145	JMPENV *top_env;
146
147	/* coro process data */
148	int prio;
149		185
150	/* data associated with this coroutine (initial args) */	186	/* data associated with this coroutine (initial args) */
151	AV *args;	187	AV *args;
152	int refcnt;	188	int refcnt;
		189	int save; /* CORO_SAVE flags */
		190	int flags; /* CF_ flags */
		191
		192	/* optionally saved, might be zero */
		193	AV *defav; /* @_ */
		194	SV *defsv; /* $_ */
		195	SV *errsv; /* $@ */
		196	GV *deffh; /* default filehandle */
		197	SV *irssv; /* $/ */
		198	SV *irssv_sv; /* real $/ cache */
		199
		200	#define VAR(name,type) type name;
		201	# include "state.h"
		202	#undef VAR
		203
		204	/* coro process data */
		205	int prio;
		206
		207	/* linked list */
		208	struct coro *next, *prev;
		209	HV *hv; /* the perl hash associated with this coro, if any */
153	};	210	};
154		211
155	typedef struct coro *Coro__State;	212	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	213	typedef struct coro *Coro__State_or_hashref;
157		214
		215	/** Coro ********************************************************************/
		216
		217	#define PRIO_MAX 3
		218	#define PRIO_HIGH 1
		219	#define PRIO_NORMAL 0
		220	#define PRIO_LOW -1
		221	#define PRIO_IDLE -3
		222	#define PRIO_MIN -4
		223
		224	/* for Coro.pm */
		225	static SV *coro_current;
		226	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		227	static int coro_nready;
		228	static struct coro *coro_first;
		229
		230	/** lowlevel stuff **********************************************************/
		231
158	static AV *	232	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	233	coro_clone_padlist (pTHX_ CV *cv)
160	{	234	{
161	AV *padlist = CvPADLIST (cv);	235	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	236	AV *newpadlist, *newpad;
163		237
164	newpadlist = newAV ();	238	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	239	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	240	#if PERL_VERSION_ATLEAST (5,9,0)
		241	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		242	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	243	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	244	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	245	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	246	--AvFILLp (padlist);
173		247
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	248	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
218		292
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	293	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		294
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	295	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		296
		297	#define CORO_MAGIC(cv) \
		298	SvMAGIC (cv) \
		299	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		300	? SvMAGIC (cv) \
		301	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		302	: 0
		303
223	/* the next two functions merely cache the padlists */	304	/* the next two functions merely cache the padlists */
224	static void	305	static void
225	get_padlist (pTHX_ CV *cv)	306	get_padlist (pTHX_ CV *cv)
226	{	307	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	308	MAGIC *mg = CORO_MAGIC (cv);
		309	AV *av;
228		310
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	311	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	312	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	313	else
232	{	314	{
233	#if 0	315	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this should work - but it doesn't :( */	316	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	317	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	318	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	319	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	320	SvREFCNT_dec (cp);
239	#else	321	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	322	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	325	}
244		326
245	static void	327	static void
246	put_padlist (pTHX_ CV *cv)	328	put_padlist (pTHX_ CV *cv)
247	{	329	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	330	MAGIC *mg = CORO_MAGIC (cv);
		331	AV *av;
249		332
250	if (!mg)	333	if (!mg)
251	{	334	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	335	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	336	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	337	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	338	mg->mg_obj = (SV *)newAV ();
256	}	339	}
257		340
258	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	341	av = (AV *)mg->mg_obj;
		342
		343	if (AvFILLp (av) >= AvMAX (av))
		344	av_extend (av, AvMAX (av) + 1);
		345
		346	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
259	}	347	}
		348
		349	/** load & save, init *******************************************************/
260		350
261	#define SB do {	351	#define SB do {
262	#define SE } while (0)	352	#define SE } while (0)
263		353
264	#define LOAD(state) load_state(aTHX_ (state));
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
266
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	354	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
268		355
269	static void	356	static void
270	load_state(pTHX_ Coro__State c)	357	load_perl (pTHX_ Coro__State c)
271	{	358	{
272	PL_dowarn = c->dowarn;	359	#define VAR(name,type) PL_ ## name = c->name;
273	PL_in_eval = c->in_eval;	360	# include "state.h"
274		361	#undef VAR
275	PL_curstackinfo = c->curstackinfo;
276	PL_curstack = c->curstack;
277	PL_mainstack = c->mainstack;
278	PL_stack_sp = c->stack_sp;
279	PL_op = c->op;
280	PL_curpad = c->curpad;
281	PL_comppad = c->comppad;
282	PL_compcv = c->compcv;
283	PL_stack_base = c->stack_base;
284	PL_stack_max = c->stack_max;
285	PL_tmps_stack = c->tmps_stack;
286	PL_tmps_floor = c->tmps_floor;
287	PL_tmps_ix = c->tmps_ix;
288	PL_tmps_max = c->tmps_max;
289	PL_markstack = c->markstack;
290	PL_markstack_ptr = c->markstack_ptr;
291	PL_markstack_max = c->markstack_max;
292	PL_scopestack = c->scopestack;
293	PL_scopestack_ix = c->scopestack_ix;
294	PL_scopestack_max = c->scopestack_max;
295	PL_savestack = c->savestack;
296	PL_savestack_ix = c->savestack_ix;
297	PL_savestack_max = c->savestack_max;
298	#if PERL_VERSION < 9
299	PL_retstack = c->retstack;
300	PL_retstack_ix = c->retstack_ix;
301	PL_retstack_max = c->retstack_max;
302	#endif
303	PL_curpm = c->curpm;
304	PL_curcop = c->curcop;
305	PL_top_env = c->top_env;
306		362
307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	363	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	364	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
309	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	365	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		366	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		367
		368	if (c->irssv)
		369	{
		370	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		371	{
		372	SvREFCNT_dec (c->irssv);
		373	c->irssv = 0;
		374	}
		375	else
		376	{
		377	REPLACE_SV (PL_rs, c->irssv);
		378	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		379	sv_setsv (c->irssv_sv, PL_rs);
		380	}
		381	}
310		382
311	{	383	{
312	dSP;	384	dSP;
313	CV *cv;	385	CV *cv;
314		386
315	/* now do the ugly restore mess */	387	/* now do the ugly restore mess */
316	while ((cv = (CV *)POPs))	388	while ((cv = (CV *)POPs))
317	{	389	{
318	AV *padlist = (AV *)POPs;
319
320	if (padlist)
321	{
322	put_padlist (aTHX_ cv); /* mark this padlist as available */	390	put_padlist (aTHX_ cv); /* mark this padlist as available */
323	CvPADLIST(cv) = padlist;	391	CvDEPTH (cv) = PTR2IV (POPs);
324	}	392	CvPADLIST (cv) = (AV *)POPs;
325
326	++CvDEPTH(cv);
327	}	393	}
328		394
329	PUTBACK;	395	PUTBACK;
330	}	396	}
331	}	397	}
332		398
333	static void	399	static void
334	save_state(pTHX_ Coro__State c, int flags)	400	save_perl (pTHX_ Coro__State c)
335	{	401	{
336	{	402	{
337	dSP;	403	dSP;
338	I32 cxix = cxstack_ix;	404	I32 cxix = cxstack_ix;
339	PERL_CONTEXT *ccstk = cxstack;	405	PERL_CONTEXT *ccstk = cxstack;
…		…
342	/*	408	/*
343	* the worst thing you can imagine happens first - we have to save	409	* the worst thing you can imagine happens first - we have to save
344	* (and reinitialize) all cv's in the whole callchain :(	410	* (and reinitialize) all cv's in the whole callchain :(
345	*/	411	*/
346		412
347	PUSHs (Nullsv);	413	XPUSHs (Nullsv);
348	/* this loop was inspired by pp_caller */	414	/* this loop was inspired by pp_caller */
349	for (;;)	415	for (;;)
350	{	416	{
351	while (cxix >= 0)	417	while (cxix >= 0)
352	{	418	{
353	PERL_CONTEXT *cx = &ccstk[cxix--];	419	PERL_CONTEXT *cx = &ccstk[cxix--];
354		420
355	if (CxTYPE(cx) == CXt_SUB)	421	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
356	{	422	{
357	CV *cv = cx->blk_sub.cv;	423	CV *cv = cx->blk_sub.cv;
		424
358	if (CvDEPTH(cv))	425	if (CvDEPTH (cv))
359	{	426	{
360	EXTEND (SP, CvDEPTH(cv)*2);	427	EXTEND (SP, 3);
361
362	while (--CvDEPTH(cv))
363	{
364	/* this tells the restore code to increment CvDEPTH */
365	PUSHs (Nullsv);
366	PUSHs ((SV *)cv);
367	}
368
369	PUSHs ((SV *)CvPADLIST(cv));	428	PUSHs ((SV *)CvPADLIST (cv));
		429	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
370	PUSHs ((SV *)cv);	430	PUSHs ((SV *)cv);
371		431
		432	CvDEPTH (cv) = 0;
372	get_padlist (aTHX_ cv);	433	get_padlist (aTHX_ cv);
373	}	434	}
374	}	435	}
375	#ifdef CXt_FORMAT
376	else if (CxTYPE(cx) == CXt_FORMAT)
377	{
378	/* I never used formats, so how should I know how these are implemented? */
379	/* my bold guess is as a simple, plain sub... */
380	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381	}
382	#endif
383	}	436	}
384		437
385	if (top_si->si_type == PERLSI_MAIN)	438	if (top_si->si_type == PERLSI_MAIN)
386	break;	439	break;
387		440
388	top_si = top_si->si_prev;	441	top_si = top_si->si_prev;
389	ccstk = top_si->si_cxstack;	442	ccstk = top_si->si_cxstack;
390	cxix = top_si->si_cxix;	443	cxix = top_si->si_cxix;
391	}	444	}
392		445
393	PUTBACK;	446	PUTBACK;
394	}	447	}
395		448
396	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	449	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	450	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
398	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	451	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		452	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		453	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
399		454
400	c->dowarn = PL_dowarn;	455	#define VAR(name,type)c->name = PL_ ## name;
401	c->in_eval = PL_in_eval;	456	# include "state.h"
402		457	#undef VAR
403	c->curstackinfo = PL_curstackinfo;
404	c->curstack = PL_curstack;
405	c->mainstack = PL_mainstack;
406	c->stack_sp = PL_stack_sp;
407	c->op = PL_op;
408	c->curpad = PL_curpad;
409	c->comppad = PL_comppad;
410	c->compcv = PL_compcv;
411	c->stack_base = PL_stack_base;
412	c->stack_max = PL_stack_max;
413	c->tmps_stack = PL_tmps_stack;
414	c->tmps_floor = PL_tmps_floor;
415	c->tmps_ix = PL_tmps_ix;
416	c->tmps_max = PL_tmps_max;
417	c->markstack = PL_markstack;
418	c->markstack_ptr = PL_markstack_ptr;
419	c->markstack_max = PL_markstack_max;
420	c->scopestack = PL_scopestack;
421	c->scopestack_ix = PL_scopestack_ix;
422	c->scopestack_max = PL_scopestack_max;
423	c->savestack = PL_savestack;
424	c->savestack_ix = PL_savestack_ix;
425	c->savestack_max = PL_savestack_max;
426	#if PERL_VERSION < 9
427	c->retstack = PL_retstack;
428	c->retstack_ix = PL_retstack_ix;
429	c->retstack_max = PL_retstack_max;
430	#endif
431	c->curpm = PL_curpm;
432	c->curcop = PL_curcop;
433	c->top_env = PL_top_env;
434	}	458	}
435		459
436	/*	460	/*
437	* allocate various perl stacks. This is an exact copy	461	* allocate various perl stacks. This is an exact copy
438	* of perl.c:init_stacks, except that it uses less memory	462	* of perl.c:init_stacks, except that it uses less memory
439	* on the (sometimes correct) assumption that coroutines do	463	* on the (sometimes correct) assumption that coroutines do
440	* not usually need a lot of stackspace.	464	* not usually need a lot of stackspace.
441	*/	465	*/
		466	#if CORO_PREFER_PERL_FUNCTIONS
		467	# define coro_init_stacks init_stacks
		468	#else
442	static void	469	static void
443	coro_init_stacks (pTHX)	470	coro_init_stacks (pTHX)
444	{	471	{
445	LOCK;	472	PL_curstackinfo = new_stackinfo(64, 6);
446
447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
448	PL_curstackinfo->si_type = PERLSI_MAIN;	473	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	474	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	475	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		476
452	PL_stack_base = AvARRAY(PL_curstack);	477	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	478	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	479	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		480
456	New(50,PL_tmps_stack,96,SV*);	481	New(50,PL_tmps_stack,64,SV*);
457	PL_tmps_floor = -1;	482	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	483	PL_tmps_ix = -1;
459	PL_tmps_max = 96;	484	PL_tmps_max = 64;
460		485
461	New(54,PL_markstack,16,I32);	486	New(54,PL_markstack,16,I32);
462	PL_markstack_ptr = PL_markstack;	487	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 16;	488	PL_markstack_max = PL_markstack + 16;
464		489
…		…
468		493
469	New(54,PL_scopestack,16,I32);	494	New(54,PL_scopestack,16,I32);
470	PL_scopestack_ix = 0;	495	PL_scopestack_ix = 0;
471	PL_scopestack_max = 16;	496	PL_scopestack_max = 16;
472		497
473	New(54,PL_savestack,96,ANY);	498	New(54,PL_savestack,64,ANY);
474	PL_savestack_ix = 0;	499	PL_savestack_ix = 0;
475	PL_savestack_max = 96;	500	PL_savestack_max = 64;
476		501
477	#if PERL_VERSION < 9	502	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,8,OP*);	503	New(54,PL_retstack,4,OP*);
479	PL_retstack_ix = 0;	504	PL_retstack_ix = 0;
480	PL_retstack_max = 8;	505	PL_retstack_max = 4;
481	#endif	506	#endif
482
483	UNLOCK;
484	}	507	}
		508	#endif
485		509
486	/*	510	/*
487	* destroy the stacks, the callchain etc...	511	* destroy the stacks, the callchain etc...
488	*/	512	*/
489	static void	513	static void
490	destroy_stacks(pTHX)	514	coro_destroy_stacks (pTHX)
491	{	515	{
492	if (!IN_DESTRUCT)	516	if (!IN_DESTRUCT)
493	{	517	{
494	/* is this ugly, I ask? */	518	/* restore all saved variables and stuff */
495	LEAVE_SCOPE (0);	519	LEAVE_SCOPE (0);
		520	assert (PL_tmps_floor == -1);
496		521
497	/* sure it is, but more important: is it correct?? :/ */	522	/* free all temporaries */
498	FREETMPS;	523	FREETMPS;
		524	assert (PL_tmps_ix == -1);
499		525
		526	/* unwind all extra stacks */
500	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	527	POPSTACK_TO (PL_mainstack);
		528
		529	/* unwind main stack */
		530	dounwind (-1);
501	}	531	}
502		532
503	while (PL_curstackinfo->si_next)	533	while (PL_curstackinfo->si_next)
504	PL_curstackinfo = PL_curstackinfo->si_next;	534	PL_curstackinfo = PL_curstackinfo->si_next;
505		535
506	while (PL_curstackinfo)	536	while (PL_curstackinfo)
507	{	537	{
508	PERL_SI *p = PL_curstackinfo->si_prev;	538	PERL_SI *p = PL_curstackinfo->si_prev;
509		539
510	{ /*D*//*remove*/
511	dSP;
512	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513	PUTBACK; /* possibly superfluous */
514	}
515
516	if (!IN_DESTRUCT)	540	if (!IN_DESTRUCT)
517	{
518	dounwind (-1);/*D*//*remove*/
519	SvREFCNT_dec (PL_curstackinfo->si_stack);	541	SvREFCNT_dec (PL_curstackinfo->si_stack);
520	}
521		542
522	Safefree (PL_curstackinfo->si_cxstack);	543	Safefree (PL_curstackinfo->si_cxstack);
523	Safefree (PL_curstackinfo);	544	Safefree (PL_curstackinfo);
524	PL_curstackinfo = p;	545	PL_curstackinfo = p;
525	}	546	}
526		547
527	Safefree (PL_tmps_stack);	548	Safefree (PL_tmps_stack);
528	Safefree (PL_markstack);	549	Safefree (PL_markstack);
529	Safefree (PL_scopestack);	550	Safefree (PL_scopestack);
530	Safefree (PL_savestack);	551	Safefree (PL_savestack);
531	#if PERL_VERSION < 9	552	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree (PL_retstack);	553	Safefree (PL_retstack);
533	#endif	554	#endif
534	}	555	}
535		556
		557	static size_t
		558	coro_rss (struct coro *coro)
		559	{
		560	size_t rss = sizeof (coro);
		561
		562	if (coro->mainstack)
		563	{
		564	if (coro->flags & CF_RUNNING)
		565	{
		566	#define VAR(name,type)coro->name = PL_ ## name;
		567	# include "state.h"
		568	#undef VAR
		569	}
		570
		571	rss += sizeof (coro->curstackinfo);
		572	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		573	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		574	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		575	rss += coro->tmps_max * sizeof (SV *);
		576	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		577	rss += coro->scopestack_max * sizeof (I32);
		578	rss += coro->savestack_max * sizeof (ANY);
		579
		580	#if !PERL_VERSION_ATLEAST (5,9,0)
		581	rss += coro->retstack_max * sizeof (OP *);
		582	#endif
		583	}
		584
		585	return rss;
		586	}
		587
		588	/** coroutine stack handling ************************************************/
		589
536	static void	590	static void
537	setup_coro (struct coro *coro)	591	setup_coro (pTHX_ struct coro *coro)
538	{	592	{
539	/*	593	/*
540	* emulate part of the perl startup here.	594	* emulate part of the perl startup here.
541	*/	595	*/
542	dTHX;	596	coro_init_stacks (aTHX);
		597
		598	PL_curcop = &PL_compiling;
		599	PL_in_eval = EVAL_NULL;
		600	PL_comppad = 0;
		601	PL_curpm = 0;
		602	PL_localizing = 0;
		603	PL_dirty = 0;
		604	PL_restartop = 0;
		605
		606	{
		607	dSP;
		608	LOGOP myop;
		609
		610	SvREFCNT_dec (GvAV (PL_defgv));
		611	GvAV (PL_defgv) = coro->args; coro->args = 0;
		612
		613	Zero (&myop, 1, LOGOP);
		614	myop.op_next = Nullop;
		615	myop.op_flags = OPf_WANT_VOID;
		616
		617	PUSHMARK (SP);
		618	XPUSHs (av_shift (GvAV (PL_defgv)));
		619	PUTBACK;
		620	PL_op = (OP *)&myop;
		621	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		622	SPAGAIN;
		623	}
		624
		625	ENTER; /* necessary e.g. for dounwind */
		626	}
		627
		628	static void
		629	free_coro_mortal (pTHX)
		630	{
		631	if (coro_mortal)
		632	{
		633	SvREFCNT_dec (coro_mortal);
		634	coro_mortal = 0;
		635	}
		636	}
		637
		638	static int
		639	runops_coro (pTHX)
		640	{
		641	COP *oldcop = 0;
		642	int oldcxix = -2;
		643
		644	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		645	{
		646	PERL_ASYNC_CHECK ();
		647
		648	if (PL_op->op_type == OP_LEAVESUB)
		649	{
		650	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		651	SV **bot, **top;
		652	AV *av = newAV (); /* return values */
		653	runops_proc_t old_runops = PL_runops;
		654	dSP;
		655	ENTER;
		656	SAVETMPS;
		657	EXTEND (SP, 3);
		658	PL_runops = RUNOPS_DEFAULT;
		659
		660	GV *gv = CvGV (cx->blk_sub.cv);
		661	SV *fullname = sv_2mortal (newSV (0));
		662	if (isGV (gv))
		663	gv_efullname3 (fullname, gv, 0);
		664
		665	bot = PL_stack_base + cx->blk_oldsp + 1;
		666	top = cx->blk_gimme == G_ARRAY ? SP + 1
		667	: cx->blk_gimme == G_SCALAR ? bot + 1
		668	: bot;
		669
		670	while (bot < top)
		671	av_push (av, SvREFCNT_inc (*bot++));
		672
		673	PUSHMARK (SP);
		674	PUSHs (&PL_sv_no);
		675	PUSHs (fullname);
		676	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		677	PUTBACK;
		678	call_pv ("Coro::_do_trace_sub", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		679	SPAGAIN;
		680
		681	FREETMPS;
		682	LEAVE;
		683	PL_runops = old_runops;
		684	}
		685
		686	if (oldcop != PL_curcop)
		687	{
		688	oldcop = PL_curcop;
		689
		690	if (PL_curcop != &PL_compiling)
		691	{
		692	runops_proc_t old_runops = PL_runops;
		693	dSP;
		694	ENTER;
		695	SAVETMPS;
		696	EXTEND (SP, 3);
		697	PL_runops = RUNOPS_DEFAULT;
		698
		699	if (oldcxix != cxstack_ix)
		700	{
		701	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		702
		703	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		704	{
		705	GV *gv = CvGV (cx->blk_sub.cv);
		706	SV *fullname = sv_2mortal (newSV (0));
		707	if (isGV (gv))
		708	gv_efullname3 (fullname, gv, 0);
		709
		710	PUSHMARK (SP);
		711	PUSHs (&PL_sv_yes);
		712	PUSHs (fullname);
		713	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		714	PUTBACK;
		715	call_pv ("Coro::_do_trace_sub", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		716	SPAGAIN;
		717	}
		718
		719	oldcxix = cxstack_ix;
		720	}
		721
		722	if (0) {
		723	PUSHMARK (SP);
		724	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		725	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		726	PUTBACK;
		727	call_pv ("Coro::_do_trace_line", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		728	SPAGAIN;
		729	}
		730
		731	FREETMPS;
		732	LEAVE;
		733	PL_runops = old_runops;
		734	}
		735	}
		736	}
		737
		738	TAINT_NOT;
		739	return 0;
		740	}
		741
		742	/* inject a fake call to Coro::State::_cctx_init into the execution */
		743	/* _cctx_init should be careful, as it could be called at almost any time */
		744	/* during execution of a perl program */
		745	static void NOINLINE
		746	prepare_cctx (pTHX_ coro_cctx *cctx)
		747	{
543	dSP;	748	dSP;
544	UNOP myop;	749	LOGOP myop;
545	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
546		750
547	coro_init_stacks (aTHX);	751	PL_top_env = &PL_start_env;
548	/*PL_curcop = 0;*/
549	/*PL_in_eval = PL_in_eval;*/ /* inherit */
550	SvREFCNT_dec (GvAV (PL_defgv));
551	GvAV (PL_defgv) = coro->args; coro->args = 0;
552		752
553	SPAGAIN;	753	if (cctx->flags & CC_TRACE)
		754	PL_runops = runops_coro;
554		755
555	Zero (&myop, 1, UNOP);	756	Zero (&myop, 1, LOGOP);
556	myop.op_next = Nullop;	757	myop.op_next = PL_op;
557	myop.op_flags = OPf_WANT_VOID;	758	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558		759
		760	PUSHMARK (SP);
		761	EXTEND (SP, 2);
		762	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		763	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		764	PUTBACK;
559	PL_op = (OP *)&myop;	765	PL_op = (OP *)&myop;
560
561	PUSHMARK(SP);
562	XPUSHs (sub_init);
563	PUTBACK;
564	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	766	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565	SPAGAIN;	767	SPAGAIN;
566
567	ENTER; /* necessary e.g. for dounwind */
568	}	768	}
569		769
570	static void	770	/*
571	transfer_tail ()	771	* this is a _very_ stripped down perl interpreter ;)
572	{	772	*/
573	if (coro_mortal)
574	{
575	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;
577	}
578
579	UNLOCK;
580	}
581
582	static void	773	static void
583	coro_run (void *arg)	774	coro_run (void *arg)
584	{	775	{
		776	dTHX;
		777
		778	/* coro_run is the alternative tail of transfer(), so unlock here. */
		779	UNLOCK;
		780
		781	/* we now skip the entersub that lead to transfer() */
		782	PL_op = PL_op->op_next;
		783
		784	/* inject a fake subroutine call to cctx_init */
		785	prepare_cctx (aTHX_ (coro_cctx *)arg);
		786
		787	/* somebody or something will hit me for both perl_run and PL_restartop */
		788	PL_restartop = PL_op;
		789	perl_run (PL_curinterp);
		790
585	/*	791	/*
586	* this is a _very_ stripped down perl interpreter ;)	792	* If perl-run returns we assume exit() was being called or the coro
		793	* fell off the end, which seems to be the only valid (non-bug)
		794	* reason for perl_run to return. We try to exit by jumping to the
		795	* bootstrap-time "top" top_env, as we cannot restore the "main"
		796	* coroutine as Coro has no such concept
587	*/	797	*/
588	dTHX;
589
590	transfer_tail ();
591
592	PL_top_env = &PL_start_env;	798	PL_top_env = main_top_env;
593	PL_restartop = PL_op->op_next;	799	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
594	/* somebody will hit me for both perl_run and PL_restart_top */
595	perl_run (aTHX_ PERL_GET_CONTEXT);
596
597	abort ();
598	}	800	}
599		801
600	static coro_stack *	802	static coro_cctx *
601	stack_new ()	803	cctx_new ()
602	{	804	{
603	coro_stack *stack;	805	coro_cctx *cctx;
		806	void *stack_start;
		807	size_t stack_size;
604		808
		809	++cctx_count;
		810
605	New (0, stack, 1, coro_stack);	811	Newz (0, cctx, 1, coro_cctx);
606		812
607	#if HAVE_MMAP	813	#if HAVE_MMAP
608		814
609	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	815	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		816	/* mmap supposedly does allocate-on-write for us */
610	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	817	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
611		818
612	if (stack->sptr == (void *)-1)	819	if (cctx->sptr != (void *)-1)
		820	{
		821	# if CORO_STACKGUARD
		822	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		823	# endif
		824	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		825	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		826	cctx->flags |= CC_MAPPED;
613	{	827	}
		828	else
		829	#endif
		830	{
		831	cctx->ssize = coro_stacksize * (long)sizeof (long);
		832	New (0, cctx->sptr, coro_stacksize, long);
		833
		834	if (!cctx->sptr)
		835	{
614	fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n");	836	perror ("FATAL: unable to allocate stack for coroutine");
615	_exit (EXIT_FAILURE);	837	_exit (EXIT_FAILURE);
616	}	838	}
617		839
618	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	840	stack_start = cctx->sptr;
619		841	stack_size = cctx->ssize;
620	#else
621
622	stack->ssize = STACKSIZE * (long)sizeof (long);
623	New (0, stack->sptr, STACKSIZE, long);
624
625	if (!stack->sptr)
626	{	842	}
627	fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");
628	_exit (EXIT_FAILURE);
629	}
630		843
631	#endif	844	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
632
633	coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize);	845	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
634		846
635	return stack;	847	return cctx;
636	}	848	}
637		849
638	static void	850	static void
639	stack_free (coro_stack *stack)	851	cctx_destroy (coro_cctx *cctx)
640	{	852	{
641	if (!stack || stack == main_stack)	853	if (!cctx)
642	return;	854	return;
643		855
		856	--cctx_count;
		857
		858	#if CORO_USE_VALGRIND
		859	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		860	#endif
		861
644	#if HAVE_MMAP	862	#if HAVE_MMAP
		863	if (cctx->flags & CC_MAPPED)
645	munmap (stack->sptr, stack->ssize);	864	munmap (cctx->sptr, cctx->ssize);
646	#else	865	else
		866	#endif
647	Safefree (stack->sptr);	867	Safefree (cctx->sptr);
648	#endif
649		868
650	Safefree (stack);	869	Safefree (cctx);
651	}	870	}
652		871
653	static coro_stack *stack_first;	872	static coro_cctx *
		873	cctx_get (pTHX)
		874	{
		875	while (cctx_first)
		876	{
		877	coro_cctx *cctx = cctx_first;
		878	cctx_first = cctx->next;
		879	--cctx_idle;
		880
		881	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		882	return cctx;
		883
		884	cctx_destroy (cctx);
		885	}
		886
		887	return cctx_new ();
		888	}
654		889
655	static void	890	static void
656	stack_get (struct coro *coro)	891	cctx_put (coro_cctx *cctx)
657	{	892	{
658	if (stack_first)	893	/* free another cctx if overlimit */
		894	if (cctx_idle >= MAX_IDLE_CCTX)
659	{	895	{
660	coro->stack = stack_first;	896	coro_cctx *first = cctx_first;
661	stack_first = stack_first->next;	897	cctx_first = first->next;
662	}	898	--cctx_idle;
663	else
664	coro->stack = stack_new ();
665	}
666		899
667	static void	900	cctx_destroy (first);
668	stack_put (coro_stack *stack)	901	}
669	{	902
670	stack->next = stack_first;	903	++cctx_idle;
671	stack_first = stack;	904	cctx->next = cctx_first;
		905	cctx_first = cctx;
672	}	906	}
		907
		908	/** coroutine switching *****************************************************/
673		909
674	/* never call directly, always through the coro_state_transfer global variable */	910	/* never call directly, always through the coro_state_transfer global variable */
675	static void	911	static void NOINLINE
676	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	912	transfer (pTHX_ struct coro *prev, struct coro *next)
677	{	913	{
678	dSTACKLEVEL;	914	dSTACKLEVEL;
679		915
680	/* sometimes transfer is only called to set idle_sp */	916	/* sometimes transfer is only called to set idle_sp */
681	if (!prev->stack->idle_sp)	917	if (!next)
682	prev->stack->idle_sp = stacklevel;	918	{
683		919	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
684	LOCK;	920	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
685		921	}
686	if (prev != next)	922	else if (prev != next)
687	{	923	{
688	coro_stack *prev_stack = prev->stack;	924	coro_cctx *prev__cctx;
689		925
690	/* possibly "free" the stack */	926	if (prev->flags & CF_NEW)
691	if (prev_stack->idle_sp == stacklevel)
692	{	927	{
693	stack_put (prev_stack);	928	/* create a new empty context */
694	prev->stack = 0;	929	Newz (0, prev->cctx, 1, coro_cctx);
		930	prev->flags &= ~CF_NEW;
		931	prev->flags |= CF_RUNNING;
695	}	932	}
696		933
697	if (!next->mainstack)	934	/*TODO: must not croak here */
		935	if (!prev->flags & CF_RUNNING)
		936	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		937
		938	if (next->flags & CF_RUNNING)
		939	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		940
		941	if (next->flags & CF_DESTROYED)
		942	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		943
		944	prev->flags &= ~CF_RUNNING;
		945	next->flags |= CF_RUNNING;
		946
		947	LOCK;
		948
		949	if (next->flags & CF_NEW)
698	{	950	{
		951	/* need to start coroutine */
		952	next->flags &= ~CF_NEW;
699	/* first get rid of the old state */	953	/* first get rid of the old state */
700	SAVE (prev, -1);	954	save_perl (aTHX_ prev);
701	/* setup coroutine call */	955	/* setup coroutine call */
702	setup_coro (next);	956	setup_coro (aTHX_ next);
703	next->stack = 0;
704	}	957	}
705	else	958	else
706	{	959	{
707	SAVE (prev, flags);	960	/* coroutine already started */
708	LOAD (next);	961	save_perl (aTHX_ prev);
		962	load_perl (aTHX_ next);
709	}	963	}
710		964
		965	prev__cctx = prev->cctx;
		966
		967	/* possibly "free" the cctx */
		968	if (prev__cctx->idle_sp == STACKLEVEL)
		969	{
		970	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		971	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		972
		973	prev->cctx = 0;
		974
		975	cctx_put (prev__cctx);
		976	}
		977
711	if (!next->stack)	978	if (!next->cctx)
712	stack_get (next);	979	next->cctx = cctx_get (aTHX);
713		980
714	if (prev_stack != next->stack)	981	if (prev__cctx != next->cctx)
		982	{
		983	prev__cctx->top_env = PL_top_env;
		984	PL_top_env = next->cctx->top_env;
715	coro_transfer (&prev_stack->cctx, &next->stack->cctx);	985	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
716	}	986	}
717		987
718	transfer_tail ();	988	free_coro_mortal (aTHX);
		989	UNLOCK;
		990	}
719	}	991	}
720		992
721	/* use this function pointer to call the above function */	993	struct transfer_args
722	/* this is done to increase chances of the compiler not inlining the call */	994	{
723	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	995	struct coro *prev, *next;
		996	};
724		997
		998	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		999
		1000	/** high level stuff ********************************************************/
		1001
725	static void	1002	static int
726	coro_state_destroy (struct coro *coro)	1003	coro_state_destroy (pTHX_ struct coro *coro)
727	{	1004	{
728	if (coro->refcnt--)	1005	if (coro->flags & CF_DESTROYED)
729	return;	1006	return 0;
		1007
		1008	coro->flags |= CF_DESTROYED;
		1009
		1010	if (coro->flags & CF_READY)
		1011	{
		1012	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1013	/* alternative: look through all ready queues and remove the coro */
		1014	LOCK;
		1015	--coro_nready;
		1016	UNLOCK;
		1017	}
		1018	else
		1019	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
730		1020
731	if (coro->mainstack && coro->mainstack != main_mainstack)	1021	if (coro->mainstack && coro->mainstack != main_mainstack)
732	{	1022	{
733	struct coro temp;	1023	struct coro temp;
734		1024
735	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1025	assert (!(coro->flags & CF_RUNNING));
		1026
		1027	Zero (&temp, 1, struct coro);
		1028	temp.save = CORO_SAVE_ALL;
		1029
		1030	if (coro->flags & CF_RUNNING)
		1031	croak ("FATAL: tried to destroy currently running coroutine");
		1032
		1033	save_perl (aTHX_ &temp);
736	LOAD (aTHX_ coro);	1034	load_perl (aTHX_ coro);
737		1035
738	destroy_stacks (aTHX);	1036	coro_destroy_stacks (aTHX);
739		1037
740	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1038	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
741		1039
742	coro->mainstack = 0;	1040	coro->mainstack = 0;
743	}	1041	}
744		1042
745	stack_free (coro->stack);	1043	cctx_destroy (coro->cctx);
746	SvREFCNT_dec (coro->args);	1044	SvREFCNT_dec (coro->args);
747	Safefree (coro);	1045
		1046	if (coro->next) coro->next->prev = coro->prev;
		1047	if (coro->prev) coro->prev->next = coro->next;
		1048	if (coro == coro_first) coro_first = coro->next;
		1049
		1050	return 1;
748	}	1051	}
749		1052
750	static int	1053	static int
751	coro_state_clear (SV *sv, MAGIC *mg)	1054	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
752	{	1055	{
753	struct coro *coro = (struct coro *)mg->mg_ptr;	1056	struct coro *coro = (struct coro *)mg->mg_ptr;
754	mg->mg_ptr = 0;	1057	mg->mg_ptr = 0;
755		1058
		1059	coro->hv = 0;
		1060
		1061	if (--coro->refcnt < 0)
		1062	{
756	coro_state_destroy (coro);	1063	coro_state_destroy (aTHX_ coro);
		1064	Safefree (coro);
		1065	}
757		1066
758	return 0;	1067	return 0;
759	}	1068	}
760		1069
761	static int	1070	static int
762	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	1071	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
763	{	1072	{
764	struct coro *coro = (struct coro *)mg->mg_ptr;	1073	struct coro *coro = (struct coro *)mg->mg_ptr;
765		1074
766	++coro->refcnt;	1075	++coro->refcnt;
767		1076
768	return 0;	1077	return 0;
769	}	1078	}
770		1079
771	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1080	static MGVTBL coro_state_vtbl = {
		1081	0, 0, 0, 0,
		1082	coro_state_free,
		1083	0,
		1084	#ifdef MGf_DUP
		1085	coro_state_dup,
		1086	#else
		1087	# define MGf_DUP 0
		1088	#endif
		1089	};
772		1090
773	static struct coro *	1091	static struct coro *
774	SvSTATE (SV *coro)	1092	SvSTATE_ (pTHX_ SV *coro)
775	{	1093	{
776	HV *stash;	1094	HV *stash;
777	MAGIC *mg;	1095	MAGIC *mg;
778		1096
779	if (SvROK (coro))	1097	if (SvROK (coro))
…		…
785	/* very slow, but rare, check */	1103	/* very slow, but rare, check */
786	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	1104	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
787	croak ("Coro::State object required");	1105	croak ("Coro::State object required");
788	}	1106	}
789		1107
790	mg = SvMAGIC (coro);	1108	mg = CORO_MAGIC (coro);
791	assert (mg->mg_type == PERL_MAGIC_ext);
792	return (struct coro *)mg->mg_ptr;	1109	return (struct coro *)mg->mg_ptr;
793	}	1110	}
794		1111
		1112	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1113
795	static void	1114	static void
		1115	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1116	{
		1117	ta->prev = SvSTATE (prev_sv);
		1118	ta->next = SvSTATE (next_sv);
		1119	}
		1120
		1121	static void
796	api_transfer (pTHX_ SV *prev, SV *next, int flags)	1122	api_transfer (SV *prev_sv, SV *next_sv)
797	{	1123	{
798	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1124	dTHX;
		1125	struct transfer_args ta;
		1126
		1127	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1128	TRANSFER (ta);
		1129	}
		1130
		1131	static int
		1132	api_save (SV *coro_sv, int new_save)
		1133	{
		1134	dTHX;
		1135	struct coro *coro = SvSTATE (coro_sv);
		1136	int old_save = coro->save;
		1137
		1138	if (new_save >= 0)
		1139	coro->save = new_save;
		1140
		1141	return old_save;
799	}	1142	}
800		1143
801	/** Coro ********************************************************************/	1144	/** Coro ********************************************************************/
802		1145
803	#define PRIO_MAX 3
804	#define PRIO_HIGH 1
805	#define PRIO_NORMAL 0
806	#define PRIO_LOW -1
807	#define PRIO_IDLE -3
808	#define PRIO_MIN -4
809
810	/* for Coro.pm */
811	static GV *coro_current, *coro_idle;
812	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
813	static int coro_nready;
814
815	static void	1146	static void
816	coro_enq (pTHX_ SV *sv)	1147	coro_enq (pTHX_ SV *coro_sv)
817	{	1148	{
818	int prio;
819
820	if (SvTYPE (sv) != SVt_PVHV)
821	croak ("Coro::ready tried to enqueue something that is not a coroutine");
822
823	prio = SvSTATE (sv)->prio;
824
825	av_push (coro_ready [prio - PRIO_MIN], sv);	1149	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
826	coro_nready++;
827	}	1150	}
828		1151
829	static SV *	1152	static SV *
830	coro_deq (pTHX_ int min_prio)	1153	coro_deq (pTHX_ int min_prio)
831	{	1154	{
…		…
835	if (min_prio < 0)	1158	if (min_prio < 0)
836	min_prio = 0;	1159	min_prio = 0;
837		1160
838	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1161	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
839	if (AvFILLp (coro_ready [prio]) >= 0)	1162	if (AvFILLp (coro_ready [prio]) >= 0)
840	{
841	coro_nready--;
842	return av_shift (coro_ready [prio]);	1163	return av_shift (coro_ready [prio]);
843	}
844		1164
845	return 0;	1165	return 0;
846	}	1166	}
847		1167
		1168	static int
		1169	api_ready (SV *coro_sv)
		1170	{
		1171	dTHX;
		1172	struct coro *coro;
		1173
		1174	if (SvROK (coro_sv))
		1175	coro_sv = SvRV (coro_sv);
		1176
		1177	coro = SvSTATE (coro_sv);
		1178
		1179	if (coro->flags & CF_READY)
		1180	return 0;
		1181
		1182	coro->flags |= CF_READY;
		1183
		1184	LOCK;
		1185	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1186	++coro_nready;
		1187	UNLOCK;
		1188
		1189	return 1;
		1190	}
		1191
		1192	static int
		1193	api_is_ready (SV *coro_sv)
		1194	{
		1195	dTHX;
		1196	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1197	}
		1198
848	static void	1199	static void
849	api_ready (SV *coro)	1200	prepare_schedule (pTHX_ struct transfer_args *ta)
850	{	1201	{
851	dTHX;	1202	SV *prev_sv, *next_sv;
852		1203
853	if (SvROK (coro))	1204	for (;;)
854	coro = SvRV (coro);	1205	{
		1206	LOCK;
		1207	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1208
		1209	/* nothing to schedule: call the idle handler */
		1210	if (!next_sv)
		1211	{
		1212	dSP;
		1213	UNLOCK;
		1214
		1215	ENTER;
		1216	SAVETMPS;
		1217
		1218	PUSHMARK (SP);
		1219	PUTBACK;
		1220	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1221
		1222	FREETMPS;
		1223	LEAVE;
		1224	continue;
		1225	}
		1226
		1227	ta->next = SvSTATE (next_sv);
		1228
		1229	/* cannot transfer to destroyed coros, skip and look for next */
		1230	if (ta->next->flags & CF_DESTROYED)
		1231	{
		1232	UNLOCK;
		1233	SvREFCNT_dec (next_sv);
		1234	/* coro_nready is already taken care of by destroy */
		1235	continue;
		1236	}
		1237
		1238	--coro_nready;
		1239	UNLOCK;
		1240	break;
		1241	}
		1242
		1243	/* free this only after the transfer */
		1244	prev_sv = SvRV (coro_current);
		1245	SvRV_set (coro_current, next_sv);
		1246	ta->prev = SvSTATE (prev_sv);
		1247
		1248	assert (ta->next->flags & CF_READY);
		1249	ta->next->flags &= ~CF_READY;
855		1250
856	LOCK;	1251	LOCK;
857	coro_enq (aTHX_ SvREFCNT_inc (coro));	1252	free_coro_mortal (aTHX);
		1253	coro_mortal = prev_sv;
858	UNLOCK;	1254	UNLOCK;
		1255	}
		1256
		1257	static void
		1258	prepare_cede (pTHX_ struct transfer_args *ta)
		1259	{
		1260	api_ready (coro_current);
		1261	prepare_schedule (aTHX_ ta);
		1262	}
		1263
		1264	static int
		1265	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1266	{
		1267	if (coro_nready)
		1268	{
		1269	SV *prev = SvRV (coro_current);
		1270	prepare_schedule (aTHX_ ta);
		1271	api_ready (prev);
		1272	return 1;
		1273	}
		1274	else
		1275	return 0;
859	}	1276	}
860		1277
861	static void	1278	static void
862	api_schedule (void)	1279	api_schedule (void)
863	{	1280	{
864	dTHX;	1281	dTHX;
		1282	struct transfer_args ta;
865		1283
866	SV *prev, *next;	1284	prepare_schedule (aTHX_ &ta);
867	SV *current = GvSV (coro_current);	1285	TRANSFER (ta);
868
869	for (;;)
870	{
871	LOCK;
872
873	next = coro_deq (aTHX_ PRIO_MIN);
874
875	if (next)
876	break;
877
878	UNLOCK;
879
880	{
881	dSP;
882
883	ENTER;
884	SAVETMPS;
885
886	PUSHMARK (SP);
887	PUTBACK;
888	call_sv (GvSV (coro_idle), G_DISCARD);
889
890	FREETMPS;
891	LEAVE;
892	}
893	}
894
895	prev = SvRV (current);
896	SvRV (current) = next;
897
898	/* free this only after the transfer */
899	coro_mortal = prev;
900
901	UNLOCK;
902
903	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);
904	}	1286	}
905		1287
906	static int coro_cede_self;
907
908	static void	1288	static int
909	api_cede (void)	1289	api_cede (void)
910	{	1290	{
911	dTHX;	1291	dTHX;
912	SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));	1292	struct transfer_args ta;
913		1293
914	LOCK;	1294	prepare_cede (aTHX_ &ta);
915		1295
916	if (coro_cede_self)	1296	if (ta.prev != ta.next)
917	{	1297	{
918	AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN];	1298	TRANSFER (ta);
919	av_unshift (runqueue, 1);	1299	return 1;
920	av_store (runqueue, 0, current);
921	coro_nready++;
922	coro_cede_self = 0;
923	}	1300	}
924	else	1301	else
925	coro_enq (aTHX_ current);	1302	return 0;
		1303	}
926		1304
927	UNLOCK;	1305	static int
		1306	api_cede_notself (void)
		1307	{
		1308	dTHX;
		1309	struct transfer_args ta;
928		1310
929	api_schedule ();	1311	if (prepare_cede_notself (aTHX_ &ta))
		1312	{
		1313	TRANSFER (ta);
		1314	return 1;
		1315	}
		1316	else
		1317	return 0;
930	}	1318	}
931		1319
932	MODULE = Coro::State PACKAGE = Coro::State	1320	MODULE = Coro::State PACKAGE = Coro::State
933		1321
934	PROTOTYPES: DISABLE	1322	PROTOTYPES: DISABLE
…		…
940	#endif	1328	#endif
941	BOOT_PAGESIZE;	1329	BOOT_PAGESIZE;
942		1330
943	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1331	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
944		1332
		1333	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1334	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
		1335	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1336	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
		1337
945	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1338	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
946	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1339	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
947	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1340	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1341	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1342	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1343	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1344	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
948		1345
949	main_mainstack = PL_mainstack;	1346	main_mainstack = PL_mainstack;
		1347	main_top_env = PL_top_env;
		1348
		1349	while (main_top_env->je_prev)
		1350	main_top_env = main_top_env->je_prev;
950		1351
951	coroapi.ver = CORO_API_VERSION;	1352	coroapi.ver = CORO_API_VERSION;
952	coroapi.transfer = api_transfer;	1353	coroapi.transfer = api_transfer;
953
954	Newz (0, main_stack, 1, coro_stack);
955	main_stack->idle_sp = (void *)-1;
956		1354
957	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1355	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
958	}	1356	}
959		1357
960	SV *	1358	SV *
…		…
965	HV *hv;	1363	HV *hv;
966	int i;	1364	int i;
967		1365
968	Newz (0, coro, 1, struct coro);	1366	Newz (0, coro, 1, struct coro);
969	coro->args = newAV ();	1367	coro->args = newAV ();
		1368	coro->save = CORO_SAVE_DEF;
		1369	coro->flags = CF_NEW;
970		1370
		1371	if (coro_first) coro_first->prev = coro;
		1372	coro->next = coro_first;
		1373	coro_first = coro;
		1374
971	hv = newHV ();	1375	coro->hv = hv = newHV ();
972	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1376	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
973	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1377	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
974		1378
975	av_push (coro->args, newSVsv (RETVAL));
976	for (i = 1; i < items; i++)	1379	for (i = 1; i < items; i++)
977	av_push (coro->args, newSVsv (ST (i)));	1380	av_push (coro->args, newSVsv (ST (i)));
978
979	coro->stack = main_stack;
980	/*coro->mainstack = 0; *//*actual work is done inside transfer */
981	/*coro->stack = 0;*/
982	}	1381	}
983	OUTPUT:	1382	OUTPUT:
984	RETVAL	1383	RETVAL
985		1384
		1385	int
		1386	save (SV *coro, int new_save = -1)
		1387	CODE:
		1388	RETVAL = api_save (coro, new_save);
		1389	OUTPUT:
		1390	RETVAL
		1391
		1392	int
		1393	save_also (SV *coro_sv, int save_also)
		1394	CODE:
		1395	{
		1396	struct coro *coro = SvSTATE (coro_sv);
		1397	RETVAL = coro->save;
		1398	coro->save |= save_also;
		1399	}
		1400	OUTPUT:
		1401	RETVAL
		1402
986	void	1403	void
987	transfer (prev, next, flags)	1404	_set_stacklevel (...)
988	SV *prev	1405	ALIAS:
989	SV *next	1406	Coro::State::transfer = 1
990	int flags	1407	Coro::schedule = 2
		1408	Coro::cede = 3
		1409	Coro::cede_notself = 4
991	CODE:	1410	CODE:
992	PUTBACK;
993	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
994	SPAGAIN;
995
996	int
997	prio (Coro::State coro, int newprio = 0)
998	ALIAS:
999	nice = 1
1000	CODE:
1001	{	1411	{
1002	RETVAL = coro->prio;	1412	struct transfer_args ta;
1003		1413
1004	if (items > 1)	1414	switch (ix)
1005	{	1415	{
		1416	case 0:
		1417	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1418	ta.next = 0;
		1419	break;
		1420
		1421	case 1:
1006	if (ix)	1422	if (items != 2)
1007	newprio += coro->prio;	1423	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1008		1424
1009	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1425	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1010	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1426	break;
1011		1427
1012	coro->prio = newprio;	1428	case 2:
		1429	prepare_schedule (aTHX_ &ta);
		1430	break;
		1431
		1432	case 3:
		1433	prepare_cede (aTHX_ &ta);
		1434	break;
		1435
		1436	case 4:
		1437	if (!prepare_cede_notself (aTHX_ &ta))
		1438	XSRETURN_EMPTY;
		1439
		1440	break;
1013	}	1441	}
1014	}
1015		1442
1016	void	1443	BARRIER;
1017	_clear_idle_sp (Coro::State self)	1444	TRANSFER (ta);
		1445
		1446	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1447	XSRETURN_YES;
		1448	}
		1449
		1450	bool
		1451	_destroy (SV *coro_sv)
1018	CODE:	1452	CODE:
1019	self->stack->idle_sp = 0;	1453	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1020		1454	OUTPUT:
1021	void	1455	RETVAL
1022	_clone_state_from (SV *dst, SV *src)
1023	CODE:
1024	{
1025	struct coro *coro_src = SvSTATE (src);
1026
1027	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1028
1029	++coro_src->refcnt;
1030	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1031	}
1032		1456
1033	void	1457	void
1034	_exit (code)	1458	_exit (code)
1035	int code	1459	int code
1036	PROTOTYPE: $	1460	PROTOTYPE: $
1037	CODE:	1461	CODE:
1038	_exit (code);	1462	_exit (code);
1039		1463
1040	MODULE = Coro::State PACKAGE = Coro::Cont	1464	int
		1465	cctx_stacksize (int new_stacksize = 0)
		1466	CODE:
		1467	RETVAL = coro_stacksize;
		1468	if (new_stacksize)
		1469	coro_stacksize = new_stacksize;
		1470	OUTPUT:
		1471	RETVAL
		1472
		1473	int
		1474	cctx_count ()
		1475	CODE:
		1476	RETVAL = cctx_count;
		1477	OUTPUT:
		1478	RETVAL
		1479
		1480	int
		1481	cctx_idle ()
		1482	CODE:
		1483	RETVAL = cctx_idle;
		1484	OUTPUT:
		1485	RETVAL
1041		1486
1042	void	1487	void
1043	yield (...)	1488	list ()
1044	PROTOTYPE: @	1489	PPCODE:
		1490	{
		1491	struct coro *coro;
		1492	for (coro = coro_first; coro; coro = coro->next)
		1493	if (coro->hv)
		1494	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1495	}
		1496
		1497	void
		1498	call (Coro::State coro, SV *coderef)
		1499	ALIAS:
		1500	eval = 1
		1501	CODE:
		1502	{
		1503	if (coro->mainstack)
		1504	{
		1505	struct coro temp;
		1506	Zero (&temp, 1, struct coro);
		1507	temp.save = CORO_SAVE_ALL;
		1508
		1509	if (!(coro->flags & CF_RUNNING))
		1510	{
		1511	save_perl (aTHX_ &temp);
		1512	load_perl (aTHX_ coro);
		1513	}
		1514
		1515	{
		1516	dSP;
		1517	ENTER;
		1518	SAVETMPS;
		1519	PUSHMARK (SP);
		1520	PUTBACK;
		1521	if (ix)
		1522	eval_sv (coderef, 0);
		1523	else
		1524	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1525	SPAGAIN;
		1526	FREETMPS;
		1527	LEAVE;
		1528	PUTBACK;
		1529	}
		1530
		1531	if (!(coro->flags & CF_RUNNING))
		1532	{
		1533	save_perl (aTHX_ coro);
		1534	load_perl (aTHX_ &temp);
		1535	}
		1536	}
		1537	}
		1538
		1539	SV *
		1540	is_ready (Coro::State coro)
		1541	PROTOTYPE: $
		1542	ALIAS:
		1543	is_ready = CF_READY
		1544	is_running = CF_RUNNING
		1545	is_new = CF_NEW
		1546	is_destroyed = CF_DESTROYED
		1547	CODE:
		1548	RETVAL = boolSV (coro->flags & ix);
		1549	OUTPUT:
		1550	RETVAL
		1551
		1552	void
		1553	trace (Coro::State coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1554	CODE:
		1555	if (flags & CC_TRACE)
		1556	{
		1557	if (!coro->cctx)
		1558	coro->cctx = cctx_new ();
		1559	else if (!(coro->cctx->flags & CC_TRACE))
		1560	croak ("cannot enable tracing on coroutine with custom stack");
		1561
		1562	coro->cctx->flags |= flags & (CC_TRACE | CC_TRACE_ALL);
		1563	}
		1564	else
		1565	if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1566	{
		1567	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1568	coro->cctx->flags |= CC_NOREUSE;
		1569	}
		1570
		1571	SV *
		1572	has_stack (Coro::State coro)
		1573	PROTOTYPE: $
		1574	CODE:
		1575	RETVAL = boolSV (!!coro->cctx);
		1576	OUTPUT:
		1577	RETVAL
		1578
		1579	int
		1580	is_traced (Coro::State coro)
		1581	PROTOTYPE: $
		1582	CODE:
		1583	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1584	OUTPUT:
		1585	RETVAL
		1586
		1587	IV
		1588	rss (Coro::State coro)
		1589	PROTOTYPE: $
1045	CODE:	1590	CODE:
1046	{	1591	RETVAL = coro_rss (coro);
1047	SV *yieldstack;	1592	OUTPUT:
1048	SV *sv;	1593	RETVAL
1049	AV *defav = GvAV (PL_defgv);
1050	struct coro *prev, *next;
1051		1594
1052	yieldstack = *hv_fetch (
1053	(HV *)SvRV (GvSV (coro_current)),
1054	"yieldstack", sizeof ("yieldstack") - 1,
1055	0
1056	);
1057
1058	/* set up @_ -- ugly */
1059	av_clear (defav);
1060	av_fill (defav, items - 1);
1061	while (items--)
1062	av_store (defav, items, SvREFCNT_inc (ST(items)));
1063
1064	sv = av_pop ((AV *)SvRV (yieldstack));
1065	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1066	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1067	SvREFCNT_dec (sv);
1068
1069	coro_state_transfer (aTHX_ prev, next, 0);
1070	}
1071		1595
1072	MODULE = Coro::State PACKAGE = Coro	1596	MODULE = Coro::State PACKAGE = Coro
1073		1597
1074	BOOT:	1598	BOOT:
1075	{	1599	{
1076	int i;	1600	int i;
		1601
		1602	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1603	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1604	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1605
		1606	coro_current = get_sv ("Coro::current", FALSE);
		1607	SvREADONLY_on (coro_current);
1077		1608
1078	coro_stash = gv_stashpv ("Coro", TRUE);	1609	coro_stash = gv_stashpv ("Coro", TRUE);
1079		1610
1080	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1611	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1081	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1612	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1082	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1613	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1083	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1614	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1084	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1615	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1085	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1616	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1086		1617
1087	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1088	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1089
1090	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1618	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1091	coro_ready[i] = newAV ();	1619	coro_ready[i] = newAV ();
1092		1620
1093	{	1621	{
1094	SV *sv = perl_get_sv("Coro::API", 1);	1622	SV *sv = perl_get_sv("Coro::API", 1);
1095		1623
1096	coroapi.schedule = api_schedule;	1624	coroapi.schedule = api_schedule;
		1625	coroapi.save = api_save;
1097	coroapi.cede = api_cede;	1626	coroapi.cede = api_cede;
		1627	coroapi.cede_notself = api_cede_notself;
1098	coroapi.ready = api_ready;	1628	coroapi.ready = api_ready;
		1629	coroapi.is_ready = api_is_ready;
1099	coroapi.nready = &coro_nready;	1630	coroapi.nready = &coro_nready;
1100	coroapi.current = coro_current;	1631	coroapi.current = coro_current;
1101		1632
1102	GCoroAPI = &coroapi;	1633	GCoroAPI = &coroapi;
1103	sv_setiv (sv, (IV)&coroapi);	1634	sv_setiv (sv, (IV)&coroapi);
1104	SvREADONLY_on (sv);	1635	SvREADONLY_on (sv);
1105	}	1636	}
1106	}	1637	}
1107		1638
1108	void	1639	void
		1640	_set_current (SV *current)
		1641	PROTOTYPE: $
		1642	CODE:
		1643	SvREFCNT_dec (SvRV (coro_current));
		1644	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1645
		1646	int
		1647	prio (Coro::State coro, int newprio = 0)
		1648	ALIAS:
		1649	nice = 1
		1650	CODE:
		1651	{
		1652	RETVAL = coro->prio;
		1653
		1654	if (items > 1)
		1655	{
		1656	if (ix)
		1657	newprio = coro->prio - newprio;
		1658
		1659	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1660	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1661
		1662	coro->prio = newprio;
		1663	}
		1664	}
		1665	OUTPUT:
		1666	RETVAL
		1667
		1668	SV *
1109	ready (SV *self)	1669	ready (SV *self)
1110	PROTOTYPE: $	1670	PROTOTYPE: $
1111	CODE:	1671	CODE:
1112	api_ready (self);	1672	RETVAL = boolSV (api_ready (self));
		1673	OUTPUT:
		1674	RETVAL
1113		1675
1114	int	1676	int
1115	nready (...)	1677	nready (...)
1116	PROTOTYPE:	1678	PROTOTYPE:
1117	CODE:	1679	CODE:
1118	RETVAL = coro_nready;	1680	RETVAL = coro_nready;
1119	OUTPUT:	1681	OUTPUT:
1120	RETVAL	1682	RETVAL
1121		1683
		1684	# for async_pool speedup
1122	void	1685	void
1123	schedule (...)	1686	_pool_1 (SV *cb)
1124	PROTOTYPE:
1125	CODE:	1687	CODE:
1126	api_schedule ();	1688	{
		1689	int i, len;
		1690	HV *hv = (HV *)SvRV (coro_current);
		1691	AV *defav = GvAV (PL_defgv);
		1692	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1693	AV *invoke_av;
		1694
		1695	if (!invoke)
		1696	croak ("\3terminate\2\n");
		1697
		1698	hv_store (hv, "desc", sizeof ("desc") - 1,
		1699	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1700
		1701	invoke_av = (AV *)SvRV (invoke);
		1702	len = av_len (invoke_av);
		1703
		1704	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1705
		1706	if (len > 0)
		1707	{
		1708	av_fill (defav, len - 1);
		1709	for (i = 0; i < len; ++i)
		1710	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1711	}
		1712
		1713	SvREFCNT_dec (invoke);
		1714	}
1127		1715
1128	void	1716	void
1129	_set_cede_self ()	1717	_pool_2 (SV *cb)
1130	CODE:	1718	CODE:
1131	coro_cede_self = 1;	1719	{
		1720	struct coro *coro = SvSTATE (coro_current);
1132		1721
1133	void	1722	sv_setsv (cb, &PL_sv_undef);
1134	cede (...)	1723
1135	PROTOTYPE:	1724	if (coro_rss (coro) > SvIV (sv_pool_rss)
1136	CODE:	1725	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
1137	api_cede ();	1726	croak ("\3terminate\2\n");
		1727
		1728	av_clear (GvAV (PL_defgv));
		1729	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1730	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1731	coro->save = CORO_SAVE_DEF;
		1732	coro->prio = 0;
		1733	av_push (av_async_pool, newSVsv (coro_current));
		1734	}
		1735
1138		1736
1139	MODULE = Coro::State PACKAGE = Coro::AIO	1737	MODULE = Coro::State PACKAGE = Coro::AIO
1140		1738
1141	SV *	1739	SV *
1142	_get_state ()	1740	_get_state ()
1143	CODE:	1741	CODE:
1144	{	1742	{
1145	struct {	1743	struct io_state *data;
1146	int errorno;
1147	int laststype;
1148	int laststatval;
1149	Stat_t statcache;
1150	} data;
1151		1744
		1745	RETVAL = newSV (sizeof (struct io_state));
		1746	data = (struct io_state *)SvPVX (RETVAL);
		1747	SvCUR_set (RETVAL, sizeof (struct io_state));
		1748	SvPOK_only (RETVAL);
		1749
1152	data.errorno = errno;	1750	data->errorno = errno;
1153	data.laststype = PL_laststype;	1751	data->laststype = PL_laststype;
1154	data.laststatval = PL_laststatval;	1752	data->laststatval = PL_laststatval;
1155	data.statcache = PL_statcache;	1753	data->statcache = PL_statcache;
1156
1157	RETVAL = newSVpvn ((char *)&data, sizeof data);
1158	}	1754	}
1159	OUTPUT:	1755	OUTPUT:
1160	RETVAL	1756	RETVAL
1161		1757
1162	void	1758	void
1163	_set_state (char *data_)	1759	_set_state (char *data_)
1164	PROTOTYPE: $	1760	PROTOTYPE: $
1165	CODE:	1761	CODE:
1166	{	1762	{
1167	struct {	1763	struct io_state *data = (void *)data_;
1168	int errorno;
1169	int laststype;
1170	int laststatval;
1171	Stat_t statcache;
1172	} *data = (void *)data_;
1173		1764
1174	errno = data->errorno;	1765	errno = data->errorno;
1175	PL_laststype = data->laststype;	1766	PL_laststype = data->laststype;
1176	PL_laststatval = data->laststatval;	1767	PL_laststatval = data->laststatval;
1177	PL_statcache = data->statcache;	1768	PL_statcache = data->statcache;
1178	}	1769	}
		1770

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