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Comparing Coro/Coro/State.xs (file contents):
Revision 1.93 by root, Sun Nov 26 03:22:50 2006 UTC vs.
Revision 1.166 by root, Wed Sep 26 21:11:28 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
		145	enum {
		146	CC_MAPPED = 0x01,
		147	CC_TRACE = 0x02,
		148	CC_NOREUSE = 0x04, /* throw this away after tracing */
		149	};
		150
91	/* this is a structure representing a c-level coroutine */	151	/* this is a structure representing a c-level coroutine */
92	typedef struct coro_stack {	152	typedef struct coro_cctx {
93	struct coro_stack *next;	153	struct coro_cctx *next;
94		154
95	/* the stack */	155	/* the stack */
96	void *sptr;	156	void *sptr;
97	long ssize; /* positive == mmap, otherwise malloc */	157	size_t ssize;
98		158
99	/* cpu state */	159	/* cpu state */
100	void *idle_sp; /* original stacklevel when coroutine was created */	160	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		161	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
101	JMPENV *top_env;	162	JMPENV *top_env;
102	coro_context cctx;	163	coro_context cctx;
103	} coro_stack;
104		164
105	/* the (fake) coro_stack representing the main program */	165	#if CORO_USE_VALGRIND
106	static coro_stack *main_stack;	166	int valgrind_id;
		167	#endif
		168	unsigned char flags;
		169	} coro_cctx;
		170
		171	enum {
		172	CF_RUNNING = 0x0001, /* coroutine is running */
		173	CF_READY = 0x0002, /* coroutine is ready */
		174	CF_NEW = 0x0004, /* has never been switched to */
		175	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		176	};
107		177
108	/* this is a structure representing a perl-level coroutine */	178	/* this is a structure representing a perl-level coroutine */
109	struct coro {	179	struct coro {
110	/* the c coroutine allocated to this perl coroutine, if any */	180	/* the c coroutine allocated to this perl coroutine, if any */
111	coro_stack *stack;	181	coro_cctx *cctx;
112		182
113	/* data associated with this coroutine (initial args) */	183	/* data associated with this coroutine (initial args) */
114	AV *args;	184	AV *args;
115	int refcnt;	185	int refcnt;
		186	int save; /* CORO_SAVE flags */
		187	int flags; /* CF_ flags */
116		188
117	/* optionally saved, might be zero */	189	/* optionally saved, might be zero */
118	AV *defav;	190	AV *defav; /* @_ */
119	SV *defsv;	191	SV *defsv; /* $_ */
120	SV *errsv;	192	SV *errsv; /* $@ */
		193	GV *deffh; /* default filehandle */
		194	SV *irssv; /* $/ */
		195	SV *irssv_sv; /* real $/ cache */
121		196
122	/* saved global state not related to stacks */	197	#define VAR(name,type) type name;
123	U8 dowarn;	198	# include "state.h"
124	I32 in_eval;	199	#undef VAR
125
126	/* the stacks and related info (callchain etc..) */
127	PERL_SI *curstackinfo;
128	AV *curstack;
129	AV *mainstack;
130	SV **stack_sp;
131	OP *op;
132	SV **curpad;
133	AV *comppad;
134	CV *compcv;
135	SV **stack_base;
136	SV **stack_max;
137	SV **tmps_stack;
138	I32 tmps_floor;
139	I32 tmps_ix;
140	I32 tmps_max;
141	I32 *markstack;
142	I32 *markstack_ptr;
143	I32 *markstack_max;
144	I32 *scopestack;
145	I32 scopestack_ix;
146	I32 scopestack_max;
147	ANY *savestack;
148	I32 savestack_ix;
149	I32 savestack_max;
150	OP **retstack;
151	I32 retstack_ix;
152	I32 retstack_max;
153	PMOP *curpm;
154	COP *curcop;
155		200
156	/* coro process data */	201	/* coro process data */
157	int prio;	202	int prio;
		203
		204	/* linked list */
		205	struct coro *next, *prev;
		206	HV *hv; /* the perl hash associated with this coro, if any */
158	};	207	};
159		208
160	typedef struct coro *Coro__State;	209	typedef struct coro *Coro__State;
161	typedef struct coro *Coro__State_or_hashref;	210	typedef struct coro *Coro__State_or_hashref;
162		211
		212	/** Coro ********************************************************************/
		213
		214	#define PRIO_MAX 3
		215	#define PRIO_HIGH 1
		216	#define PRIO_NORMAL 0
		217	#define PRIO_LOW -1
		218	#define PRIO_IDLE -3
		219	#define PRIO_MIN -4
		220
		221	/* for Coro.pm */
		222	static SV *coro_current;
		223	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		224	static int coro_nready;
		225	static struct coro *coro_first;
		226
		227	/** lowlevel stuff **********************************************************/
		228
163	static AV *	229	static AV *
164	coro_clone_padlist (pTHX_ CV *cv)	230	coro_clone_padlist (pTHX_ CV *cv)
165	{	231	{
166	AV *padlist = CvPADLIST (cv);	232	AV *padlist = CvPADLIST (cv);
167	AV *newpadlist, *newpad;	233	AV *newpadlist, *newpad;
168		234
169	newpadlist = newAV ();	235	newpadlist = newAV ();
170	AvREAL_off (newpadlist);	236	AvREAL_off (newpadlist);
171	#if PERL_VERSION < 9	237	#if PERL_VERSION_ATLEAST (5,9,0)
		238	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		239	#else
172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	240	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
173	#else
174	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
175	#endif	241	#endif
176	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	242	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
177	--AvFILLp (padlist);	243	--AvFILLp (padlist);
178		244
179	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	245	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
223		289
224	#define PERL_MAGIC_coro PERL_MAGIC_ext	290	#define PERL_MAGIC_coro PERL_MAGIC_ext
225		291
226	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	292	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
227		293
		294	#define CORO_MAGIC(cv) \
		295	SvMAGIC (cv) \
		296	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		297	? SvMAGIC (cv) \
		298	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		299	: 0
		300
228	/* the next two functions merely cache the padlists */	301	/* the next two functions merely cache the padlists */
229	static void	302	static void
230	get_padlist (pTHX_ CV *cv)	303	get_padlist (pTHX_ CV *cv)
231	{	304	{
232	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	305	MAGIC *mg = CORO_MAGIC (cv);
		306	AV *av;
233		307
234	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	308	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
235	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	309	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
236	else	310	else
237	{	311	{
238	#if 0	312	#if CORO_PREFER_PERL_FUNCTIONS
239	/* this should work - but it doesn't :( */	313	/* this is probably cleaner, but also slower? */
240	CV *cp = Perl_cv_clone (aTHX_ cv);	314	CV *cp = Perl_cv_clone (cv);
241	CvPADLIST (cv) = CvPADLIST (cp);	315	CvPADLIST (cv) = CvPADLIST (cp);
242	CvPADLIST (cp) = 0;	316	CvPADLIST (cp) = 0;
243	SvREFCNT_dec (cp);	317	SvREFCNT_dec (cp);
244	#else	318	#else
245	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	319	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
248	}	322	}
249		323
250	static void	324	static void
251	put_padlist (pTHX_ CV *cv)	325	put_padlist (pTHX_ CV *cv)
252	{	326	{
253	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	327	MAGIC *mg = CORO_MAGIC (cv);
		328	AV *av;
254		329
255	if (!mg)	330	if (!mg)
256	{	331	{
257	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	332	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
258	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	333	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
259	mg->mg_virtual = &vtbl_coro;	334	mg->mg_virtual = &vtbl_coro;
260	mg->mg_obj = (SV *)newAV ();	335	mg->mg_obj = (SV *)newAV ();
261	}	336	}
262		337
263	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	338	av = (AV *)mg->mg_obj;
		339
		340	if (AvFILLp (av) >= AvMAX (av))
		341	av_extend (av, AvMAX (av) + 1);
		342
		343	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
264	}	344	}
		345
		346	/** load & save, init *******************************************************/
265		347
266	#define SB do {	348	#define SB do {
267	#define SE } while (0)	349	#define SE } while (0)
268		350
269	#define LOAD(state) load_state(aTHX_ (state));
270	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
271
272	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	351	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
273		352
274	static void	353	static void
275	load_state(pTHX_ Coro__State c)	354	load_perl (pTHX_ Coro__State c)
276	{	355	{
277	PL_dowarn = c->dowarn;	356	#define VAR(name,type) PL_ ## name = c->name;
278	PL_in_eval = c->in_eval;	357	# include "state.h"
279		358	#undef VAR
280	PL_curstackinfo = c->curstackinfo;
281	PL_curstack = c->curstack;
282	PL_mainstack = c->mainstack;
283	PL_stack_sp = c->stack_sp;
284	PL_op = c->op;
285	PL_curpad = c->curpad;
286	PL_comppad = c->comppad;
287	PL_compcv = c->compcv;
288	PL_stack_base = c->stack_base;
289	PL_stack_max = c->stack_max;
290	PL_tmps_stack = c->tmps_stack;
291	PL_tmps_floor = c->tmps_floor;
292	PL_tmps_ix = c->tmps_ix;
293	PL_tmps_max = c->tmps_max;
294	PL_markstack = c->markstack;
295	PL_markstack_ptr = c->markstack_ptr;
296	PL_markstack_max = c->markstack_max;
297	PL_scopestack = c->scopestack;
298	PL_scopestack_ix = c->scopestack_ix;
299	PL_scopestack_max = c->scopestack_max;
300	PL_savestack = c->savestack;
301	PL_savestack_ix = c->savestack_ix;
302	PL_savestack_max = c->savestack_max;
303	#if PERL_VERSION < 9
304	PL_retstack = c->retstack;
305	PL_retstack_ix = c->retstack_ix;
306	PL_retstack_max = c->retstack_max;
307	#endif
308	PL_curpm = c->curpm;
309	PL_curcop = c->curcop;
310		359
311	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	360	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
312	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	361	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
313	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	362	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		363	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		364
		365	if (c->irssv)
		366	{
		367	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		368	{
		369	SvREFCNT_dec (c->irssv);
		370	c->irssv = 0;
		371	}
		372	else
		373	{
		374	REPLACE_SV (PL_rs, c->irssv);
		375	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		376	sv_setsv (c->irssv_sv, PL_rs);
		377	}
		378	}
314		379
315	{	380	{
316	dSP;	381	dSP;
317	CV *cv;	382	CV *cv;
318		383
319	/* now do the ugly restore mess */	384	/* now do the ugly restore mess */
320	while ((cv = (CV *)POPs))	385	while ((cv = (CV *)POPs))
321	{	386	{
322	AV *padlist = (AV *)POPs;
323
324	if (padlist)
325	{
326	put_padlist (aTHX_ cv); /* mark this padlist as available */	387	put_padlist (aTHX_ cv); /* mark this padlist as available */
327	CvPADLIST(cv) = padlist;	388	CvDEPTH (cv) = PTR2IV (POPs);
328	}	389	CvPADLIST (cv) = (AV *)POPs;
329
330	++CvDEPTH(cv);
331	}	390	}
332		391
333	PUTBACK;	392	PUTBACK;
334	}	393	}
335	}	394	}
336		395
337	static void	396	static void
338	save_state(pTHX_ Coro__State c, int flags)	397	save_perl (pTHX_ Coro__State c)
339	{	398	{
340	{	399	{
341	dSP;	400	dSP;
342	I32 cxix = cxstack_ix;	401	I32 cxix = cxstack_ix;
343	PERL_CONTEXT *ccstk = cxstack;	402	PERL_CONTEXT *ccstk = cxstack;
…		…
346	/*	405	/*
347	* the worst thing you can imagine happens first - we have to save	406	* the worst thing you can imagine happens first - we have to save
348	* (and reinitialize) all cv's in the whole callchain :(	407	* (and reinitialize) all cv's in the whole callchain :(
349	*/	408	*/
350		409
351	PUSHs (Nullsv);	410	XPUSHs (Nullsv);
352	/* this loop was inspired by pp_caller */	411	/* this loop was inspired by pp_caller */
353	for (;;)	412	for (;;)
354	{	413	{
355	while (cxix >= 0)	414	while (cxix >= 0)
356	{	415	{
357	PERL_CONTEXT *cx = &ccstk[cxix--];	416	PERL_CONTEXT *cx = &ccstk[cxix--];
358		417
359	if (CxTYPE(cx) == CXt_SUB)	418	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
360	{	419	{
361	CV *cv = cx->blk_sub.cv;	420	CV *cv = cx->blk_sub.cv;
		421
362	if (CvDEPTH(cv))	422	if (CvDEPTH (cv))
363	{	423	{
364	EXTEND (SP, CvDEPTH(cv)*2);	424	EXTEND (SP, 3);
365
366	while (--CvDEPTH(cv))
367	{
368	/* this tells the restore code to increment CvDEPTH */
369	PUSHs (Nullsv);
370	PUSHs ((SV *)cv);
371	}
372
373	PUSHs ((SV *)CvPADLIST(cv));	425	PUSHs ((SV *)CvPADLIST (cv));
		426	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
374	PUSHs ((SV *)cv);	427	PUSHs ((SV *)cv);
375		428
		429	CvDEPTH (cv) = 0;
376	get_padlist (aTHX_ cv);	430	get_padlist (aTHX_ cv);
377	}	431	}
378	}	432	}
379	#ifdef CXt_FORMAT
380	else if (CxTYPE(cx) == CXt_FORMAT)
381	{
382	/* I never used formats, so how should I know how these are implemented? */
383	/* my bold guess is as a simple, plain sub... */
384	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
385	}
386	#endif
387	}	433	}
388		434
389	if (top_si->si_type == PERLSI_MAIN)	435	if (top_si->si_type == PERLSI_MAIN)
390	break;	436	break;
391		437
392	top_si = top_si->si_prev;	438	top_si = top_si->si_prev;
393	ccstk = top_si->si_cxstack;	439	ccstk = top_si->si_cxstack;
394	cxix = top_si->si_cxix;	440	cxix = top_si->si_cxix;
395	}	441	}
396		442
397	PUTBACK;	443	PUTBACK;
398	}	444	}
399		445
400	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	446	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
401	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	447	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
402	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	448	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		449	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		450	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
403		451
404	c->dowarn = PL_dowarn;	452	#define VAR(name,type)c->name = PL_ ## name;
405	c->in_eval = PL_in_eval;	453	# include "state.h"
406		454	#undef VAR
407	c->curstackinfo = PL_curstackinfo;
408	c->curstack = PL_curstack;
409	c->mainstack = PL_mainstack;
410	c->stack_sp = PL_stack_sp;
411	c->op = PL_op;
412	c->curpad = PL_curpad;
413	c->comppad = PL_comppad;
414	c->compcv = PL_compcv;
415	c->stack_base = PL_stack_base;
416	c->stack_max = PL_stack_max;
417	c->tmps_stack = PL_tmps_stack;
418	c->tmps_floor = PL_tmps_floor;
419	c->tmps_ix = PL_tmps_ix;
420	c->tmps_max = PL_tmps_max;
421	c->markstack = PL_markstack;
422	c->markstack_ptr = PL_markstack_ptr;
423	c->markstack_max = PL_markstack_max;
424	c->scopestack = PL_scopestack;
425	c->scopestack_ix = PL_scopestack_ix;
426	c->scopestack_max = PL_scopestack_max;
427	c->savestack = PL_savestack;
428	c->savestack_ix = PL_savestack_ix;
429	c->savestack_max = PL_savestack_max;
430	#if PERL_VERSION < 9
431	c->retstack = PL_retstack;
432	c->retstack_ix = PL_retstack_ix;
433	c->retstack_max = PL_retstack_max;
434	#endif
435	c->curpm = PL_curpm;
436	c->curcop = PL_curcop;
437	}	455	}
438		456
439	/*	457	/*
440	* allocate various perl stacks. This is an exact copy	458	* allocate various perl stacks. This is an exact copy
441	* of perl.c:init_stacks, except that it uses less memory	459	* of perl.c:init_stacks, except that it uses less memory
442	* on the (sometimes correct) assumption that coroutines do	460	* on the (sometimes correct) assumption that coroutines do
443	* not usually need a lot of stackspace.	461	* not usually need a lot of stackspace.
444	*/	462	*/
		463	#if CORO_PREFER_PERL_FUNCTIONS
		464	# define coro_init_stacks init_stacks
		465	#else
445	static void	466	static void
446	coro_init_stacks (pTHX)	467	coro_init_stacks (pTHX)
447	{	468	{
448	LOCK;	469	PL_curstackinfo = new_stackinfo(64, 6);
449
450	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
451	PL_curstackinfo->si_type = PERLSI_MAIN;	470	PL_curstackinfo->si_type = PERLSI_MAIN;
452	PL_curstack = PL_curstackinfo->si_stack;	471	PL_curstack = PL_curstackinfo->si_stack;
453	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	472	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
454		473
455	PL_stack_base = AvARRAY(PL_curstack);	474	PL_stack_base = AvARRAY(PL_curstack);
456	PL_stack_sp = PL_stack_base;	475	PL_stack_sp = PL_stack_base;
457	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	476	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
458		477
459	New(50,PL_tmps_stack,96,SV*);	478	New(50,PL_tmps_stack,64,SV*);
460	PL_tmps_floor = -1;	479	PL_tmps_floor = -1;
461	PL_tmps_ix = -1;	480	PL_tmps_ix = -1;
462	PL_tmps_max = 96;	481	PL_tmps_max = 64;
463		482
464	New(54,PL_markstack,16,I32);	483	New(54,PL_markstack,16,I32);
465	PL_markstack_ptr = PL_markstack;	484	PL_markstack_ptr = PL_markstack;
466	PL_markstack_max = PL_markstack + 16;	485	PL_markstack_max = PL_markstack + 16;
467		486
…		…
471		490
472	New(54,PL_scopestack,16,I32);	491	New(54,PL_scopestack,16,I32);
473	PL_scopestack_ix = 0;	492	PL_scopestack_ix = 0;
474	PL_scopestack_max = 16;	493	PL_scopestack_max = 16;
475		494
476	New(54,PL_savestack,96,ANY);	495	New(54,PL_savestack,64,ANY);
477	PL_savestack_ix = 0;	496	PL_savestack_ix = 0;
478	PL_savestack_max = 96;	497	PL_savestack_max = 64;
479		498
480	#if PERL_VERSION < 9	499	#if !PERL_VERSION_ATLEAST (5,9,0)
481	New(54,PL_retstack,8,OP*);	500	New(54,PL_retstack,4,OP*);
482	PL_retstack_ix = 0;	501	PL_retstack_ix = 0;
483	PL_retstack_max = 8;	502	PL_retstack_max = 4;
484	#endif	503	#endif
485
486	UNLOCK;
487	}	504	}
		505	#endif
488		506
489	/*	507	/*
490	* destroy the stacks, the callchain etc...	508	* destroy the stacks, the callchain etc...
491	*/	509	*/
492	static void	510	static void
493	destroy_stacks(pTHX)	511	coro_destroy_stacks (pTHX)
494	{	512	{
495	if (!IN_DESTRUCT)	513	if (!IN_DESTRUCT)
496	{	514	{
497	/* is this ugly, I ask? */	515	/* restore all saved variables and stuff */
498	LEAVE_SCOPE (0);	516	LEAVE_SCOPE (0);
		517	assert (PL_tmps_floor == -1);
499		518
500	/* sure it is, but more important: is it correct?? :/ */	519	/* free all temporaries */
501	FREETMPS;	520	FREETMPS;
		521	assert (PL_tmps_ix == -1);
502		522
		523	/* unwind all extra stacks */
503	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	524	POPSTACK_TO (PL_mainstack);
		525
		526	/* unwind main stack */
		527	dounwind (-1);
504	}	528	}
505		529
506	while (PL_curstackinfo->si_next)	530	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;	531	PL_curstackinfo = PL_curstackinfo->si_next;
508		532
509	while (PL_curstackinfo)	533	while (PL_curstackinfo)
510	{	534	{
511	PERL_SI *p = PL_curstackinfo->si_prev;	535	PERL_SI *p = PL_curstackinfo->si_prev;
512		536
513	{ /*D*//*remove*/
514	dSP;
515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516	PUTBACK; /* possibly superfluous */
517	}
518
519	if (!IN_DESTRUCT)	537	if (!IN_DESTRUCT)
520	{
521	dounwind (-1);/*D*//*remove*/
522	SvREFCNT_dec (PL_curstackinfo->si_stack);	538	SvREFCNT_dec (PL_curstackinfo->si_stack);
523	}
524		539
525	Safefree (PL_curstackinfo->si_cxstack);	540	Safefree (PL_curstackinfo->si_cxstack);
526	Safefree (PL_curstackinfo);	541	Safefree (PL_curstackinfo);
527	PL_curstackinfo = p;	542	PL_curstackinfo = p;
528	}	543	}
529		544
530	Safefree (PL_tmps_stack);	545	Safefree (PL_tmps_stack);
531	Safefree (PL_markstack);	546	Safefree (PL_markstack);
532	Safefree (PL_scopestack);	547	Safefree (PL_scopestack);
533	Safefree (PL_savestack);	548	Safefree (PL_savestack);
534	#if PERL_VERSION < 9	549	#if !PERL_VERSION_ATLEAST (5,9,0)
535	Safefree (PL_retstack);	550	Safefree (PL_retstack);
536	#endif	551	#endif
537	}	552	}
538		553
		554	static size_t
		555	coro_rss (struct coro *coro)
		556	{
		557	size_t rss = sizeof (coro);
		558
		559	if (coro->mainstack)
		560	{
		561	if (coro->flags & CF_RUNNING)
		562	{
		563	#define VAR(name,type)coro->name = PL_ ## name;
		564	# include "state.h"
		565	#undef VAR
		566	}
		567
		568	rss += sizeof (coro->curstackinfo);
		569	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		570	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		571	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		572	rss += coro->tmps_max * sizeof (SV *);
		573	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		574	rss += coro->scopestack_max * sizeof (I32);
		575	rss += coro->savestack_max * sizeof (ANY);
		576
		577	#if !PERL_VERSION_ATLEAST (5,9,0)
		578	rss += coro->retstack_max * sizeof (OP *);
		579	#endif
		580	}
		581
		582	return rss;
		583	}
		584
		585	/** coroutine stack handling ************************************************/
		586
539	static void	587	static void
540	setup_coro (struct coro *coro)	588	setup_coro (pTHX_ struct coro *coro)
541	{	589	{
542	/*	590	/*
543	* emulate part of the perl startup here.	591	* emulate part of the perl startup here.
544	*/	592	*/
545	dTHX;	593	coro_init_stacks (aTHX);
		594
		595	PL_curcop = &PL_compiling;
		596	PL_in_eval = EVAL_NULL;
		597	PL_comppad = 0;
		598	PL_curpm = 0;
		599	PL_localizing = 0;
		600	PL_dirty = 0;
		601	PL_restartop = 0;
		602
		603	{
		604	dSP;
		605	LOGOP myop;
		606
		607	SvREFCNT_dec (GvAV (PL_defgv));
		608	GvAV (PL_defgv) = coro->args; coro->args = 0;
		609
		610	Zero (&myop, 1, LOGOP);
		611	myop.op_next = Nullop;
		612	myop.op_flags = OPf_WANT_VOID;
		613
		614	PUSHMARK (SP);
		615	XPUSHs (av_shift (GvAV (PL_defgv)));
		616	PUTBACK;
		617	PL_op = (OP *)&myop;
		618	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		619	SPAGAIN;
		620	}
		621
		622	ENTER; /* necessary e.g. for dounwind */
		623	}
		624
		625	static void
		626	free_coro_mortal (pTHX)
		627	{
		628	if (coro_mortal)
		629	{
		630	SvREFCNT_dec (coro_mortal);
		631	coro_mortal = 0;
		632	}
		633	}
		634
		635	static void
		636	do_trace (pTHX)
		637	{
		638	if (PL_curcop != &PL_compiling)
		639	{
		640	runops_proc_t old_runops = PL_runops;
		641	dSP;
		642	ENTER;
		643	SAVETMPS;
		644	PUSHMARK (SP);
		645	PUTBACK;
		646	PL_runops = RUNOPS_DEFAULT;
		647	call_pv ("Coro::_do_trace", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD | G_NOARGS);
		648	PL_runops = old_runops;
		649	SPAGAIN;
		650	FREETMPS;
		651	LEAVE;
		652	PUTBACK;
		653	}
		654	}
		655
		656	static int
		657	runops_coro (pTHX)
		658	{
		659	COP *oldcop = 0;
		660
		661	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		662	{
		663	PERL_ASYNC_CHECK ();
		664
		665	if (oldcop != PL_curcop)
		666	{
		667	oldcop = PL_curcop;
		668	do_trace (aTHX);
		669	}
		670	}
		671
		672	TAINT_NOT;
		673	return 0;
		674	}
		675
		676	/* inject a fake call to Coro::State::_cctx_init into the execution */
		677	/* _cctx_init should be careful, as it could be called at almost any time */
		678	/* during execution of a perl program */
		679	static void NOINLINE
		680	prepare_cctx (pTHX_ coro_cctx *cctx)
		681	{
546	dSP;	682	dSP;
547	UNOP myop;	683	LOGOP myop;
548	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
549		684
550	coro_init_stacks (aTHX);	685	PL_top_env = &PL_start_env;
551	/*PL_curcop = 0;*/
552	/*PL_in_eval = PL_in_eval;*/ /* inherit */
553	SvREFCNT_dec (GvAV (PL_defgv));
554	GvAV (PL_defgv) = coro->args; coro->args = 0;
555		686
556	SPAGAIN;	687	if (cctx->flags & CC_TRACE)
		688	PL_runops = runops_coro;
557		689
558	Zero (&myop, 1, UNOP);	690	Zero (&myop, 1, LOGOP);
559	myop.op_next = Nullop;	691	myop.op_next = PL_op;
560	myop.op_flags = OPf_WANT_VOID;	692	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
561		693
		694	PUSHMARK (SP);
		695	EXTEND (SP, 2);
		696	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		697	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		698	PUTBACK;
562	PL_op = (OP *)&myop;	699	PL_op = (OP *)&myop;
563
564	PUSHMARK(SP);
565	XPUSHs (sub_init);
566	PUTBACK;
567	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	700	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
568	SPAGAIN;	701	SPAGAIN;
569
570	ENTER; /* necessary e.g. for dounwind */
571	}	702	}
572		703
573	static void	704	/*
574	free_coro_mortal ()	705	* this is a _very_ stripped down perl interpreter ;)
575	{	706	*/
576	if (coro_mortal)
577	{
578	SvREFCNT_dec (coro_mortal);
579	coro_mortal = 0;
580	}
581	}
582
583	static void	707	static void
584	coro_run (void *arg)	708	coro_run (void *arg)
585	{	709	{
		710	dTHX;
		711
		712	/* coro_run is the alternative tail of transfer(), so unlock here. */
		713	UNLOCK;
		714
		715	/* we now skip the entersub that lead to transfer() */
		716	PL_op = PL_op->op_next;
		717
		718	/* inject a fake subroutine call to cctx_init */
		719	prepare_cctx (aTHX_ (coro_cctx *)arg);
		720
		721	/* somebody or something will hit me for both perl_run and PL_restartop */
		722	PL_restartop = PL_op;
		723	perl_run (PL_curinterp);
		724
586	/*	725	/*
587	* this is a _very_ stripped down perl interpreter ;)	726	* If perl-run returns we assume exit() was being called or the coro
		727	* fell off the end, which seems to be the only valid (non-bug)
		728	* reason for perl_run to return. We try to exit by jumping to the
		729	* bootstrap-time "top" top_env, as we cannot restore the "main"
		730	* coroutine as Coro has no such concept
588	*/	731	*/
589	dTHX;
590
591	UNLOCK;
592
593	PL_top_env = &PL_start_env;	732	PL_top_env = main_top_env;
594		733	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
595	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
596	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
597
598	/* continue at cctx_init, without entersub */
599	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
600
601	/* somebody will hit me for both perl_run and PL_restart_op */
602	perl_run (aTHX_ PERL_GET_CONTEXT);
603
604	abort ();
605	}	734	}
606		735
607	static coro_stack *	736	static coro_cctx *
608	stack_new ()	737	cctx_new ()
609	{	738	{
610	coro_stack *stack;	739	coro_cctx *cctx;
		740	void *stack_start;
		741	size_t stack_size;
611		742
		743	++cctx_count;
		744
612	New (0, stack, 1, coro_stack);	745	Newz (0, cctx, 1, coro_cctx);
613		746
614	#if HAVE_MMAP	747	#if HAVE_MMAP
615		748
616	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	749	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		750	/* mmap supposedly does allocate-on-write for us */
617	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	751	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
618		752
619	if (stack->sptr == (void *)-1)	753	if (cctx->sptr != (void *)-1)
		754	{
		755	# if CORO_STACKGUARD
		756	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		757	# endif
		758	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		759	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		760	cctx->flags |= CC_MAPPED;
620	{	761	}
		762	else
		763	#endif
		764	{
		765	cctx->ssize = coro_stacksize * (long)sizeof (long);
		766	New (0, cctx->sptr, coro_stacksize, long);
		767
		768	if (!cctx->sptr)
		769	{
621	perror ("FATAL: unable to mmap stack for coroutine");	770	perror ("FATAL: unable to allocate stack for coroutine");
622	_exit (EXIT_FAILURE);	771	_exit (EXIT_FAILURE);
623	}	772	}
624		773
625	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	774	stack_start = cctx->sptr;
626		775	stack_size = cctx->ssize;
627	#else
628
629	stack->ssize = STACKSIZE * (long)sizeof (long);
630	New (0, stack->sptr, STACKSIZE, long);
631
632	if (!stack->sptr)
633	{	776	}
634	perror (stderr, "FATAL: unable to malloc stack for coroutine");
635	_exit (EXIT_FAILURE);
636	}
637		777
638	#endif	778	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
639
640	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	779	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
641		780
642	return stack;	781	return cctx;
643	}	782	}
644		783
645	static void	784	static void
646	stack_free (coro_stack *stack)	785	cctx_destroy (coro_cctx *cctx)
647	{	786	{
648	if (!stack || stack == main_stack)	787	if (!cctx)
649	return;	788	return;
650		789
		790	--cctx_count;
		791
		792	#if CORO_USE_VALGRIND
		793	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		794	#endif
		795
651	#if HAVE_MMAP	796	#if HAVE_MMAP
		797	if (cctx->flags & CC_MAPPED)
652	munmap (stack->sptr, stack->ssize);	798	munmap (cctx->sptr, cctx->ssize);
653	#else
654	Safefree (stack->sptr);
655	#endif
656
657	Safefree (stack);
658	}
659
660	static coro_stack *stack_first;
661
662	static coro_stack *
663	stack_get ()
664	{
665	coro_stack *stack;
666
667	if (stack_first)
668	{
669	stack = stack_first;
670	stack_first = stack->next;
671	}
672	else	799	else
		800	#endif
		801	Safefree (cctx->sptr);
		802
		803	Safefree (cctx);
		804	}
		805
		806	static coro_cctx *
		807	cctx_get (pTHX)
		808	{
		809	while (cctx_first)
673	{	810	{
674	stack = stack_new ();	811	coro_cctx *cctx = cctx_first;
675	PL_op = PL_op->op_next;	812	cctx_first = cctx->next;
		813	--cctx_idle;
		814
		815	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		816	return cctx;
		817
		818	cctx_destroy (cctx);
676	}	819	}
677		820
678	return stack;	821	return cctx_new ();
679	}	822	}
680		823
681	static void	824	static void
682	stack_put (coro_stack *stack)	825	cctx_put (coro_cctx *cctx)
683	{	826	{
684	stack->next = stack_first;	827	/* free another cctx if overlimit */
685	stack_first = stack;	828	if (cctx_idle >= MAX_IDLE_CCTX)
		829	{
		830	coro_cctx *first = cctx_first;
		831	cctx_first = first->next;
		832	--cctx_idle;
		833
		834	cctx_destroy (first);
		835	}
		836
		837	++cctx_idle;
		838	cctx->next = cctx_first;
		839	cctx_first = cctx;
686	}	840	}
		841
		842	/** coroutine switching *****************************************************/
687		843
688	/* never call directly, always through the coro_state_transfer global variable */	844	/* never call directly, always through the coro_state_transfer global variable */
689	static void	845	static void NOINLINE
690	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	846	transfer (pTHX_ struct coro *prev, struct coro *next)
691	{	847	{
692	dSTACKLEVEL;	848	dSTACKLEVEL;
693		849
694	/* sometimes transfer is only called to set idle_sp */	850	/* sometimes transfer is only called to set idle_sp */
695	if (flags == TRANSFER_SET_STACKLEVEL)	851	if (!next)
		852	{
696	((coro_stack *)prev)->idle_sp = STACKLEVEL;	853	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		854	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		855	}
697	else if (prev != next)	856	else if (prev != next)
698	{	857	{
699	coro_stack *prev__stack;	858	coro_cctx *prev__cctx;
		859
		860	if (prev->flags & CF_NEW)
		861	{
		862	/* create a new empty context */
		863	Newz (0, prev->cctx, 1, coro_cctx);
		864	prev->flags &= ~CF_NEW;
		865	prev->flags |= CF_RUNNING;
		866	}
		867
		868	/*TODO: must not croak here */
		869	if (!prev->flags & CF_RUNNING)
		870	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		871
		872	if (next->flags & CF_RUNNING)
		873	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		874
		875	if (next->flags & CF_DESTROYED)
		876	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		877
		878	prev->flags &= ~CF_RUNNING;
		879	next->flags |= CF_RUNNING;
700		880
701	LOCK;	881	LOCK;
702		882
703	if (next->mainstack)	883	if (next->flags & CF_NEW)
704	{	884	{
705	/* coroutine already started */	885	/* need to start coroutine */
706	SAVE (prev, flags);	886	next->flags &= ~CF_NEW;
707	LOAD (next);	887	/* first get rid of the old state */
		888	save_perl (aTHX_ prev);
		889	/* setup coroutine call */
		890	setup_coro (aTHX_ next);
708	}	891	}
709	else	892	else
710	{	893	{
711	/* need to start coroutine */	894	/* coroutine already started */
712	/* first get rid of the old state */	895	save_perl (aTHX_ prev);
713	SAVE (prev, -1);	896	load_perl (aTHX_ next);
714	/* setup coroutine call */
715	setup_coro (next);
716	/* need a stack */
717	next->stack = 0;
718	}	897	}
719		898
720	prev__stack = prev->stack;	899	prev__cctx = prev->cctx;
721		900
722	/* possibly "free" the stack */	901	/* possibly "free" the cctx */
723	if (prev__stack->idle_sp == STACKLEVEL)	902	if (prev__cctx->idle_sp == STACKLEVEL)
724	{	903	{
725	stack_put (prev__stack);	904	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		905	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		906
726	prev->stack = 0;	907	prev->cctx = 0;
		908
		909	cctx_put (prev__cctx);
727	}	910	}
728		911
729	if (!next->stack)	912	if (!next->cctx)
730	next->stack = stack_get ();	913	next->cctx = cctx_get (aTHX);
731		914
732	if (prev__stack != next->stack)	915	if (prev__cctx != next->cctx)
733	{	916	{
734	prev__stack->top_env = PL_top_env;	917	prev__cctx->top_env = PL_top_env;
735	PL_top_env = next->stack->top_env;	918	PL_top_env = next->cctx->top_env;
736	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	919	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
737	}	920	}
738		921
739	free_coro_mortal ();	922	free_coro_mortal (aTHX);
740
741	UNLOCK;	923	UNLOCK;
742	}	924	}
743	}	925	}
744		926
745	/* use this function pointer to call the above function */
746	/* this is done to increase chances of the compiler not inlining the call */
747	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
748	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
749
750	struct transfer_args	927	struct transfer_args
751	{	928	{
752	struct coro *prev, *next;	929	struct coro *prev, *next;
753	int flags;
754	};	930	};
755		931
756	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	932	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
757		933
		934	/** high level stuff ********************************************************/
		935
758	static void	936	static int
759	coro_state_destroy (struct coro *coro)	937	coro_state_destroy (pTHX_ struct coro *coro)
760	{	938	{
761	if (coro->refcnt--)	939	if (coro->flags & CF_DESTROYED)
762	return;	940	return 0;
		941
		942	coro->flags |= CF_DESTROYED;
		943
		944	if (coro->flags & CF_READY)
		945	{
		946	/* reduce nready, as destroying a ready coro effectively unreadies it */
		947	/* alternative: look through all ready queues and remove the coro */
		948	LOCK;
		949	--coro_nready;
		950	UNLOCK;
		951	}
		952	else
		953	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
763		954
764	if (coro->mainstack && coro->mainstack != main_mainstack)	955	if (coro->mainstack && coro->mainstack != main_mainstack)
765	{	956	{
766	struct coro temp;	957	struct coro temp;
767		958
768	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	959	assert (!(coro->flags & CF_RUNNING));
		960
		961	Zero (&temp, 1, struct coro);
		962	temp.save = CORO_SAVE_ALL;
		963
		964	if (coro->flags & CF_RUNNING)
		965	croak ("FATAL: tried to destroy currently running coroutine");
		966
		967	save_perl (aTHX_ &temp);
769	LOAD (aTHX_ coro);	968	load_perl (aTHX_ coro);
770		969
771	destroy_stacks (aTHX);	970	coro_destroy_stacks (aTHX);
772		971
773	LOAD ((&temp)); /* this will get rid of defsv etc.. */	972	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
774		973
775	coro->mainstack = 0;	974	coro->mainstack = 0;
776	}	975	}
777		976
778	stack_free (coro->stack);	977	cctx_destroy (coro->cctx);
779	SvREFCNT_dec (coro->args);	978	SvREFCNT_dec (coro->args);
780	Safefree (coro);	979
		980	if (coro->next) coro->next->prev = coro->prev;
		981	if (coro->prev) coro->prev->next = coro->next;
		982	if (coro == coro_first) coro_first = coro->next;
		983
		984	return 1;
781	}	985	}
782		986
783	static int	987	static int
784	coro_state_clear (SV *sv, MAGIC *mg)	988	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
785	{	989	{
786	struct coro *coro = (struct coro *)mg->mg_ptr;	990	struct coro *coro = (struct coro *)mg->mg_ptr;
787	mg->mg_ptr = 0;	991	mg->mg_ptr = 0;
788		992
		993	coro->hv = 0;
		994
		995	if (--coro->refcnt < 0)
		996	{
789	coro_state_destroy (coro);	997	coro_state_destroy (aTHX_ coro);
		998	Safefree (coro);
		999	}
790		1000
791	return 0;	1001	return 0;
792	}	1002	}
793		1003
794	static int	1004	static int
795	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	1005	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
796	{	1006	{
797	struct coro *coro = (struct coro *)mg->mg_ptr;	1007	struct coro *coro = (struct coro *)mg->mg_ptr;
798		1008
799	++coro->refcnt;	1009	++coro->refcnt;
800		1010
801	return 0;	1011	return 0;
802	}	1012	}
803		1013
804	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1014	static MGVTBL coro_state_vtbl = {
		1015	0, 0, 0, 0,
		1016	coro_state_free,
		1017	0,
		1018	#ifdef MGf_DUP
		1019	coro_state_dup,
		1020	#else
		1021	# define MGf_DUP 0
		1022	#endif
		1023	};
805		1024
806	static struct coro *	1025	static struct coro *
807	SvSTATE (SV *coro)	1026	SvSTATE_ (pTHX_ SV *coro)
808	{	1027	{
809	HV *stash;	1028	HV *stash;
810	MAGIC *mg;	1029	MAGIC *mg;
811		1030
812	if (SvROK (coro))	1031	if (SvROK (coro))
…		…
818	/* very slow, but rare, check */	1037	/* very slow, but rare, check */
819	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	1038	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
820	croak ("Coro::State object required");	1039	croak ("Coro::State object required");
821	}	1040	}
822		1041
823	mg = SvMAGIC (coro);	1042	mg = CORO_MAGIC (coro);
824	assert (mg->mg_type == PERL_MAGIC_ext);
825	return (struct coro *)mg->mg_ptr;	1043	return (struct coro *)mg->mg_ptr;
826	}	1044	}
827		1045
		1046	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1047
828	static void	1048	static void
829	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	1049	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
830	{	1050	{
831	ta->prev = SvSTATE (prev);	1051	ta->prev = SvSTATE (prev_sv);
832	ta->next = SvSTATE (next);	1052	ta->next = SvSTATE (next_sv);
833	ta->flags = flags;
834	}	1053	}
835		1054
836	static void	1055	static void
837	api_transfer (SV *prev, SV *next, int flags)	1056	api_transfer (SV *prev_sv, SV *next_sv)
838	{	1057	{
839	dTHX;	1058	dTHX;
840	struct transfer_args ta;	1059	struct transfer_args ta;
841		1060
842	prepare_transfer (aTHX_ &ta, prev, next, flags);	1061	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
843	TRANSFER (ta);	1062	TRANSFER (ta);
844	}	1063	}
845		1064
		1065	static int
		1066	api_save (SV *coro_sv, int new_save)
		1067	{
		1068	dTHX;
		1069	struct coro *coro = SvSTATE (coro_sv);
		1070	int old_save = coro->save;
		1071
		1072	if (new_save >= 0)
		1073	coro->save = new_save;
		1074
		1075	return old_save;
		1076	}
		1077
846	/** Coro ********************************************************************/	1078	/** Coro ********************************************************************/
847		1079
848	#define PRIO_MAX 3
849	#define PRIO_HIGH 1
850	#define PRIO_NORMAL 0
851	#define PRIO_LOW -1
852	#define PRIO_IDLE -3
853	#define PRIO_MIN -4
854
855	/* for Coro.pm */
856	static GV *coro_current, *coro_idle;
857	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
858	static int coro_nready;
859
860	static void	1080	static void
861	coro_enq (pTHX_ SV *sv)	1081	coro_enq (pTHX_ SV *coro_sv)
862	{	1082	{
863	int prio;
864
865	if (SvTYPE (sv) != SVt_PVHV)
866	croak ("Coro::ready tried to enqueue something that is not a coroutine");
867
868	prio = SvSTATE (sv)->prio;
869
870	av_push (coro_ready [prio - PRIO_MIN], sv);	1083	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
871	coro_nready++;
872	}	1084	}
873		1085
874	static SV *	1086	static SV *
875	coro_deq (pTHX_ int min_prio)	1087	coro_deq (pTHX_ int min_prio)
876	{	1088	{
…		…
880	if (min_prio < 0)	1092	if (min_prio < 0)
881	min_prio = 0;	1093	min_prio = 0;
882		1094
883	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1095	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
884	if (AvFILLp (coro_ready [prio]) >= 0)	1096	if (AvFILLp (coro_ready [prio]) >= 0)
885	{
886	coro_nready--;
887	return av_shift (coro_ready [prio]);	1097	return av_shift (coro_ready [prio]);
888	}
889		1098
890	return 0;	1099	return 0;
891	}	1100	}
892		1101
893	static void	1102	static int
894	api_ready (SV *coro)	1103	api_ready (SV *coro_sv)
895	{	1104	{
896	dTHX;	1105	dTHX;
		1106	struct coro *coro;
897		1107
898	if (SvROK (coro))	1108	if (SvROK (coro_sv))
899	coro = SvRV (coro);	1109	coro_sv = SvRV (coro_sv);
		1110
		1111	coro = SvSTATE (coro_sv);
		1112
		1113	if (coro->flags & CF_READY)
		1114	return 0;
		1115
		1116	coro->flags |= CF_READY;
900		1117
901	LOCK;	1118	LOCK;
902	coro_enq (aTHX_ SvREFCNT_inc (coro));	1119	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1120	++coro_nready;
903	UNLOCK;	1121	UNLOCK;
904	}
905		1122
		1123	return 1;
		1124	}
		1125
906	static void	1126	static int
		1127	api_is_ready (SV *coro_sv)
		1128	{
		1129	dTHX;
		1130	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1131	}
		1132
		1133	static void
907	prepare_schedule (aTHX_ struct transfer_args *ta)	1134	prepare_schedule (pTHX_ struct transfer_args *ta)
908	{	1135	{
909	SV *current, *prev, *next;	1136	SV *prev_sv, *next_sv;
		1137
		1138	for (;;)
		1139	{
		1140	LOCK;
		1141	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1142
		1143	/* nothing to schedule: call the idle handler */
		1144	if (!next_sv)
		1145	{
		1146	dSP;
		1147	UNLOCK;
		1148
		1149	ENTER;
		1150	SAVETMPS;
		1151
		1152	PUSHMARK (SP);
		1153	PUTBACK;
		1154	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1155
		1156	FREETMPS;
		1157	LEAVE;
		1158	continue;
		1159	}
		1160
		1161	ta->next = SvSTATE (next_sv);
		1162
		1163	/* cannot transfer to destroyed coros, skip and look for next */
		1164	if (ta->next->flags & CF_DESTROYED)
		1165	{
		1166	UNLOCK;
		1167	SvREFCNT_dec (next_sv);
		1168	/* coro_nready is already taken care of by destroy */
		1169	continue;
		1170	}
		1171
		1172	--coro_nready;
		1173	UNLOCK;
		1174	break;
		1175	}
		1176
		1177	/* free this only after the transfer */
		1178	prev_sv = SvRV (coro_current);
		1179	SvRV_set (coro_current, next_sv);
		1180	ta->prev = SvSTATE (prev_sv);
		1181
		1182	assert (ta->next->flags & CF_READY);
		1183	ta->next->flags &= ~CF_READY;
910		1184
911	LOCK;	1185	LOCK;
912
913	current = GvSV (coro_current);
914
915	for (;;)
916	{
917	LOCK;
918
919	next = coro_deq (aTHX_ PRIO_MIN);
920
921	if (next)
922	break;
923
924	UNLOCK;
925
926	{
927	dSP;
928
929	ENTER;
930	SAVETMPS;
931
932	PUSHMARK (SP);
933	PUTBACK;
934	call_sv (GvSV (coro_idle), G_DISCARD);
935
936	FREETMPS;
937	LEAVE;
938	}
939	}
940
941	prev = SvRV (current);
942	SvRV (current) = next;
943
944	/* free this only after the transfer */
945	free_coro_mortal ();	1186	free_coro_mortal (aTHX);
946	coro_mortal = prev;	1187	coro_mortal = prev_sv;
947
948	ta->prev = SvSTATE (prev);
949	ta->next = SvSTATE (next);
950	ta->flags = TRANSFER_SAVE_ALL;
951
952	UNLOCK;	1188	UNLOCK;
953	}	1189	}
954		1190
955	static void	1191	static void
956	prepare_cede (aTHX_ struct transfer_args *ta)	1192	prepare_cede (pTHX_ struct transfer_args *ta)
957	{	1193	{
958	LOCK;	1194	api_ready (coro_current);
959	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
960	UNLOCK;
961
962	prepare_schedule (ta);	1195	prepare_schedule (aTHX_ ta);
		1196	}
		1197
		1198	static int
		1199	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1200	{
		1201	if (coro_nready)
		1202	{
		1203	SV *prev = SvRV (coro_current);
		1204	prepare_schedule (aTHX_ ta);
		1205	api_ready (prev);
		1206	return 1;
		1207	}
		1208	else
		1209	return 0;
963	}	1210	}
964		1211
965	static void	1212	static void
966	api_schedule (void)	1213	api_schedule (void)
967	{	1214	{
968	dTHX;	1215	dTHX;
969	struct transfer_args ta;	1216	struct transfer_args ta;
970		1217
971	prepare_schedule (&ta);	1218	prepare_schedule (aTHX_ &ta);
972	TRANSFER (ta);	1219	TRANSFER (ta);
973	}	1220	}
974		1221
975	static void	1222	static int
976	api_cede (void)	1223	api_cede (void)
977	{	1224	{
978	dTHX;	1225	dTHX;
979	struct transfer_args ta;	1226	struct transfer_args ta;
980		1227
981	prepare_cede (&ta);	1228	prepare_cede (aTHX_ &ta);
		1229
		1230	if (ta.prev != ta.next)
		1231	{
982	TRANSFER (ta);	1232	TRANSFER (ta);
		1233	return 1;
		1234	}
		1235	else
		1236	return 0;
		1237	}
		1238
		1239	static int
		1240	api_cede_notself (void)
		1241	{
		1242	dTHX;
		1243	struct transfer_args ta;
		1244
		1245	if (prepare_cede_notself (aTHX_ &ta))
		1246	{
		1247	TRANSFER (ta);
		1248	return 1;
		1249	}
		1250	else
		1251	return 0;
983	}	1252	}
984		1253
985	MODULE = Coro::State PACKAGE = Coro::State	1254	MODULE = Coro::State PACKAGE = Coro::State
986		1255
987	PROTOTYPES: DISABLE	1256	PROTOTYPES: DISABLE
…		…
993	#endif	1262	#endif
994	BOOT_PAGESIZE;	1263	BOOT_PAGESIZE;
995		1264
996	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1265	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
997		1266
998	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1267	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
999	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1268	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1000	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1269	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1270	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1271	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1272	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1273	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1001		1274
1002	main_mainstack = PL_mainstack;	1275	main_mainstack = PL_mainstack;
		1276	main_top_env = PL_top_env;
		1277
		1278	while (main_top_env->je_prev)
		1279	main_top_env = main_top_env->je_prev;
1003		1280
1004	coroapi.ver = CORO_API_VERSION;	1281	coroapi.ver = CORO_API_VERSION;
1005	coroapi.transfer = api_transfer;	1282	coroapi.transfer = api_transfer;
1006
1007	Newz (0, main_stack, 1, coro_stack);
1008	main_stack->idle_sp = (void *)-1;
1009		1283
1010	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1284	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1011	}	1285	}
1012		1286
1013	SV *	1287	SV *
…		…
1018	HV *hv;	1292	HV *hv;
1019	int i;	1293	int i;
1020		1294
1021	Newz (0, coro, 1, struct coro);	1295	Newz (0, coro, 1, struct coro);
1022	coro->args = newAV ();	1296	coro->args = newAV ();
		1297	coro->save = CORO_SAVE_DEF;
		1298	coro->flags = CF_NEW;
1023		1299
		1300	if (coro_first) coro_first->prev = coro;
		1301	coro->next = coro_first;
		1302	coro_first = coro;
		1303
1024	hv = newHV ();	1304	coro->hv = hv = newHV ();
1025	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1305	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1026	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1306	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1027		1307
1028	for (i = 1; i < items; i++)	1308	for (i = 1; i < items; i++)
1029	av_push (coro->args, newSVsv (ST (i)));	1309	av_push (coro->args, newSVsv (ST (i)));
1030
1031	coro->stack = main_stack;
1032	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1033	/*coro->stack = 0;*/
1034	}	1310	}
1035	OUTPUT:	1311	OUTPUT:
1036	RETVAL	1312	RETVAL
1037		1313
		1314	int
		1315	save (SV *coro, int new_save = -1)
		1316	CODE:
		1317	RETVAL = api_save (coro, new_save);
		1318	OUTPUT:
		1319	RETVAL
		1320
		1321	int
		1322	save_also (SV *coro_sv, int save_also)
		1323	CODE:
		1324	{
		1325	struct coro *coro = SvSTATE (coro_sv);
		1326	RETVAL = coro->save;
		1327	coro->save |= save_also;
		1328	}
		1329	OUTPUT:
		1330	RETVAL
		1331
1038	void	1332	void
1039	transfer (...)	1333	_set_stacklevel (...)
1040	ALIAS:	1334	ALIAS:
1041	Coro::schedule = 1	1335	Coro::State::transfer = 1
1042	Coro::cede = 2	1336	Coro::schedule = 2
1043	_set_stacklevel = 3	1337	Coro::cede = 3
		1338	Coro::cede_notself = 4
1044	CODE:	1339	CODE:
1045	{	1340	{
1046	struct transfer_args ta;	1341	struct transfer_args ta;
1047		1342
1048	switch (ix)	1343	switch (ix)
1049	{	1344	{
1050	case 0:	1345	case 0:
1051	if (items != 3)	1346	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1052	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1347	ta.next = 0;
1053
1054	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
1055	break;	1348	break;
1056		1349
1057	case 1:	1350	case 1:
1058	prepare_schedule (&ta);	1351	if (items != 2)
		1352	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1353
		1354	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1059	break;	1355	break;
1060		1356
1061	case 2:	1357	case 2:
1062	prepare_cede (&ta);	1358	prepare_schedule (aTHX_ &ta);
1063	break;	1359	break;
1064		1360
1065	case 3:	1361	case 3:
1066	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1362	prepare_cede (aTHX_ &ta);
1067	ta.next = 0;	1363	break;
1068	ta.flags = TRANSFER_SET_STACKLEVEL;	1364
		1365	case 4:
		1366	if (!prepare_cede_notself (aTHX_ &ta))
		1367	XSRETURN_EMPTY;
		1368
1069	break;	1369	break;
1070	}	1370	}
1071		1371
		1372	BARRIER;
1072	TRANSFER (ta);	1373	TRANSFER (ta);
1073	}
1074		1374
1075	void	1375	if (GIMME_V != G_VOID && ta.next != ta.prev)
1076	_clone_state_from (SV *dst, SV *src)	1376	XSRETURN_YES;
		1377	}
		1378
		1379	bool
		1380	_destroy (SV *coro_sv)
1077	CODE:	1381	CODE:
1078	{	1382	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1079	struct coro *coro_src = SvSTATE (src);	1383	OUTPUT:
1080		1384	RETVAL
1081	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1082
1083	++coro_src->refcnt;
1084	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1085	}
1086
1087	void
1088	_nonlocal_goto (IV nextop)
1089	CODE:
1090	/* uuh, somebody will kill me again for this */
1091	PL_op->op_next = INT2PTR (OP *, nextop);
1092		1385
1093	void	1386	void
1094	_exit (code)	1387	_exit (code)
1095	int code	1388	int code
1096	PROTOTYPE: $	1389	PROTOTYPE: $
1097	CODE:	1390	CODE:
1098	_exit (code);	1391	_exit (code);
1099		1392
1100	MODULE = Coro::State PACKAGE = Coro::Cont	1393	int
		1394	cctx_stacksize (int new_stacksize = 0)
		1395	CODE:
		1396	RETVAL = coro_stacksize;
		1397	if (new_stacksize)
		1398	coro_stacksize = new_stacksize;
		1399	OUTPUT:
		1400	RETVAL
		1401
		1402	int
		1403	cctx_count ()
		1404	CODE:
		1405	RETVAL = cctx_count;
		1406	OUTPUT:
		1407	RETVAL
		1408
		1409	int
		1410	cctx_idle ()
		1411	CODE:
		1412	RETVAL = cctx_idle;
		1413	OUTPUT:
		1414	RETVAL
1101		1415
1102	void	1416	void
1103	yield (...)	1417	list ()
1104	PROTOTYPE: @	1418	PPCODE:
		1419	{
		1420	struct coro *coro;
		1421	for (coro = coro_first; coro; coro = coro->next)
		1422	if (coro->hv)
		1423	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1424	}
		1425
		1426	void
		1427	call (Coro::State coro, SV *coderef)
		1428	ALIAS:
		1429	eval = 1
		1430	CODE:
		1431	{
		1432	if (coro->mainstack)
		1433	{
		1434	struct coro temp;
		1435	Zero (&temp, 1, struct coro);
		1436	temp.save = CORO_SAVE_ALL;
		1437
		1438	if (!(coro->flags & CF_RUNNING))
		1439	{
		1440	save_perl (aTHX_ &temp);
		1441	load_perl (aTHX_ coro);
		1442	}
		1443
		1444	{
		1445	dSP;
		1446	ENTER;
		1447	SAVETMPS;
		1448	PUSHMARK (SP);
		1449	PUTBACK;
		1450	if (ix)
		1451	eval_sv (coderef, 0);
		1452	else
		1453	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1454	SPAGAIN;
		1455	FREETMPS;
		1456	LEAVE;
		1457	PUTBACK;
		1458	}
		1459
		1460	if (!(coro->flags & CF_RUNNING))
		1461	{
		1462	save_perl (aTHX_ coro);
		1463	load_perl (aTHX_ &temp);
		1464	}
		1465	}
		1466	}
		1467
		1468	SV *
		1469	is_ready (Coro::State coro)
		1470	PROTOTYPE: $
		1471	ALIAS:
		1472	is_ready = CF_READY
		1473	is_running = CF_RUNNING
		1474	is_new = CF_NEW
		1475	is_destroyed = CF_DESTROYED
		1476	CODE:
		1477	RETVAL = boolSV (coro->flags & ix);
		1478	OUTPUT:
		1479	RETVAL
		1480
		1481	void
		1482	trace (Coro::State coro, int enable = 0)
		1483	CODE:
		1484	if (enable)
		1485	{
		1486	if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1487	XSRETURN_EMPTY;
		1488
		1489	if (coro->flags & CF_RUNNING)
		1490	croak ("cannot enable tracing on running coroutine");
		1491
		1492	if (coro->cctx)
		1493	croak ("cannot enable tracing on coroutine with custom stack");
		1494
		1495	coro->cctx = cctx_new ();
		1496	coro->cctx->flags |= CC_TRACE;
		1497	}
		1498	else
		1499	if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1500	{
		1501	coro->cctx->flags &= ~CC_TRACE;
		1502	coro->cctx->flags |= CC_NOREUSE;
		1503	}
		1504
		1505	SV *
		1506	has_stack (Coro::State coro)
		1507	PROTOTYPE: $
		1508	CODE:
		1509	RETVAL = boolSV (!!coro->cctx);
		1510	OUTPUT:
		1511	RETVAL
		1512
		1513	IV
		1514	rss (Coro::State coro)
		1515	PROTOTYPE: $
1105	CODE:	1516	CODE:
1106	{	1517	RETVAL = coro_rss (coro);
1107	SV *yieldstack;	1518	OUTPUT:
1108	SV *sv;	1519	RETVAL
1109	AV *defav = GvAV (PL_defgv);
1110	struct coro *prev, *next;
1111		1520
1112	yieldstack = *hv_fetch (
1113	(HV *)SvRV (GvSV (coro_current)),
1114	"yieldstack", sizeof ("yieldstack") - 1,
1115	0
1116	);
1117
1118	/* set up @_ -- ugly */
1119	av_clear (defav);
1120	av_fill (defav, items - 1);
1121	while (items--)
1122	av_store (defav, items, SvREFCNT_inc (ST(items)));
1123
1124	sv = av_pop ((AV *)SvRV (yieldstack));
1125	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1126	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1127	SvREFCNT_dec (sv);
1128
1129	coro_state_transfer (aTHX_ prev, next, 0);
1130	}
1131		1521
1132	MODULE = Coro::State PACKAGE = Coro	1522	MODULE = Coro::State PACKAGE = Coro
1133		1523
1134	BOOT:	1524	BOOT:
1135	{	1525	{
1136	int i;	1526	int i;
		1527
		1528	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1529	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1530	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1531
		1532	coro_current = get_sv ("Coro::current", FALSE);
		1533	SvREADONLY_on (coro_current);
1137		1534
1138	coro_stash = gv_stashpv ("Coro", TRUE);	1535	coro_stash = gv_stashpv ("Coro", TRUE);
1139		1536
1140	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1537	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1141	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1538	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1142	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1539	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1143	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1540	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1144	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1541	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1145	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1542	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1146		1543
1147	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1148	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1149
1150	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1544	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1151	coro_ready[i] = newAV ();	1545	coro_ready[i] = newAV ();
1152		1546
1153	{	1547	{
1154	SV *sv = perl_get_sv("Coro::API", 1);	1548	SV *sv = perl_get_sv("Coro::API", 1);
1155		1549
1156	coroapi.schedule = api_schedule;	1550	coroapi.schedule = api_schedule;
		1551	coroapi.save = api_save;
1157	coroapi.cede = api_cede;	1552	coroapi.cede = api_cede;
		1553	coroapi.cede_notself = api_cede_notself;
1158	coroapi.ready = api_ready;	1554	coroapi.ready = api_ready;
		1555	coroapi.is_ready = api_is_ready;
1159	coroapi.nready = &coro_nready;	1556	coroapi.nready = &coro_nready;
1160	coroapi.current = coro_current;	1557	coroapi.current = coro_current;
1161		1558
1162	GCoroAPI = &coroapi;	1559	GCoroAPI = &coroapi;
1163	sv_setiv (sv, (IV)&coroapi);	1560	sv_setiv (sv, (IV)&coroapi);
1164	SvREADONLY_on (sv);	1561	SvREADONLY_on (sv);
1165	}	1562	}
1166	}	1563	}
		1564
		1565	void
		1566	_set_current (SV *current)
		1567	PROTOTYPE: $
		1568	CODE:
		1569	SvREFCNT_dec (SvRV (coro_current));
		1570	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1167		1571
1168	int	1572	int
1169	prio (Coro::State coro, int newprio = 0)	1573	prio (Coro::State coro, int newprio = 0)
1170	ALIAS:	1574	ALIAS:
1171	nice = 1	1575	nice = 1
…		…
1174	RETVAL = coro->prio;	1578	RETVAL = coro->prio;
1175		1579
1176	if (items > 1)	1580	if (items > 1)
1177	{	1581	{
1178	if (ix)	1582	if (ix)
1179	newprio += coro->prio;	1583	newprio = coro->prio - newprio;
1180		1584
1181	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1585	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1182	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1586	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1183		1587
1184	coro->prio = newprio;	1588	coro->prio = newprio;
1185	}	1589	}
1186	}	1590	}
		1591	OUTPUT:
		1592	RETVAL
1187		1593
1188	void	1594	SV *
1189	ready (SV *self)	1595	ready (SV *self)
1190	PROTOTYPE: $	1596	PROTOTYPE: $
1191	CODE:	1597	CODE:
1192	api_ready (self);	1598	RETVAL = boolSV (api_ready (self));
		1599	OUTPUT:
		1600	RETVAL
1193		1601
1194	int	1602	int
1195	nready (...)	1603	nready (...)
1196	PROTOTYPE:	1604	PROTOTYPE:
1197	CODE:	1605	CODE:
1198	RETVAL = coro_nready;	1606	RETVAL = coro_nready;
1199	OUTPUT:	1607	OUTPUT:
1200	RETVAL	1608	RETVAL
1201		1609
		1610	# for async_pool speedup
		1611	void
		1612	_pool_1 (SV *cb)
		1613	CODE:
		1614	{
		1615	int i, len;
		1616	HV *hv = (HV *)SvRV (coro_current);
		1617	AV *defav = GvAV (PL_defgv);
		1618	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1619	AV *invoke_av;
		1620
		1621	if (!invoke)
		1622	croak ("\3terminate\2\n");
		1623
		1624	hv_store (hv, "desc", sizeof ("desc") - 1,
		1625	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1626
		1627	invoke_av = (AV *)SvRV (invoke);
		1628	len = av_len (invoke_av);
		1629
		1630	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1631
		1632	if (len > 0)
		1633	{
		1634	av_fill (defav, len - 1);
		1635	for (i = 0; i < len; ++i)
		1636	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1637	}
		1638
		1639	SvREFCNT_dec (invoke);
		1640	}
		1641
		1642	void
		1643	_pool_2 (SV *cb)
		1644	CODE:
		1645	{
		1646	struct coro *coro = SvSTATE (coro_current);
		1647
		1648	sv_setsv (cb, &PL_sv_undef);
		1649
		1650	if (coro_rss (coro) > SvIV (sv_pool_rss)
		1651	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1652	croak ("\3terminate\2\n");
		1653
		1654	av_clear (GvAV (PL_defgv));
		1655	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1656	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1657	coro->save = CORO_SAVE_DEF;
		1658	coro->prio = 0;
		1659	av_push (av_async_pool, newSVsv (coro_current));
		1660	}
		1661
		1662
1202	MODULE = Coro::State PACKAGE = Coro::AIO	1663	MODULE = Coro::State PACKAGE = Coro::AIO
1203		1664
1204	SV *	1665	SV *
1205	_get_state ()	1666	_get_state ()
1206	CODE:	1667	CODE:
1207	{	1668	{
1208	struct {	1669	struct io_state *data;
1209	int errorno;
1210	int laststype;
1211	int laststatval;
1212	Stat_t statcache;
1213	} data;
1214		1670
		1671	RETVAL = newSV (sizeof (struct io_state));
		1672	data = (struct io_state *)SvPVX (RETVAL);
		1673	SvCUR_set (RETVAL, sizeof (struct io_state));
		1674	SvPOK_only (RETVAL);
		1675
1215	data.errorno = errno;	1676	data->errorno = errno;
1216	data.laststype = PL_laststype;	1677	data->laststype = PL_laststype;
1217	data.laststatval = PL_laststatval;	1678	data->laststatval = PL_laststatval;
1218	data.statcache = PL_statcache;	1679	data->statcache = PL_statcache;
1219
1220	RETVAL = newSVpvn ((char *)&data, sizeof data);
1221	}	1680	}
1222	OUTPUT:	1681	OUTPUT:
1223	RETVAL	1682	RETVAL
1224		1683
1225	void	1684	void
1226	_set_state (char *data_)	1685	_set_state (char *data_)
1227	PROTOTYPE: $	1686	PROTOTYPE: $
1228	CODE:	1687	CODE:
1229	{	1688	{
1230	struct {	1689	struct io_state *data = (void *)data_;
1231	int errorno;
1232	int laststype;
1233	int laststatval;
1234	Stat_t statcache;
1235	} *data = (void *)data_;
1236		1690
1237	errno = data->errorno;	1691	errno = data->errorno;
1238	PL_laststype = data->laststype;	1692	PL_laststype = data->laststype;
1239	PL_laststatval = data->laststatval;	1693	PL_laststatval = data->laststatval;
1240	PL_statcache = data->statcache;	1694	PL_statcache = data->statcache;
1241	}	1695	}
		1696

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