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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.85 by root, Fri Nov 24 00:32:04 2006 UTC vs.
Revision 1.165 by root, Wed Sep 26 19:26:48 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <errno.h>	75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
33		79
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	81	# undef CORO_STACKGUARD
36	#endif
37
38	#ifndef STACKGUARD
39	# define STACKGUARD 0
40	#endif
41
42	#ifdef HAVE_MMAP
43	# include <unistd.h>
44	# include <sys/mman.h>
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	82	#endif
52	# include <limits.h>	83
53	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	86	#endif
60	#endif
61		87
62	#define SUB_INIT "Coro::State::initialize"	88	/* prefer perl internal functions over our own? */
63	#define UCORO_STATE "_coro_state"	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
64		92
65	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macros try to return the current stack pointer, in an as
66	* to the current C stack pointer. Its property is that it changes with each call	94	* portable way as possible. */
67	* and should be unique. */	95	#define dSTACKLEVEL volatile char stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
69		97
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		99
72	#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))
73		109
74	#include "CoroAPI.h"	110	#include "CoroAPI.h"
75		111
76	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
…		…
80	#else	116	#else
81	# define LOCK (void)0	117	# define LOCK (void)0
82	# define UNLOCK (void)0	118	# define UNLOCK (void)0
83	#endif	119	#endif
84		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;
85	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
86	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;
87	static HV *coro_state_stash;	134	static HV *coro_state_stash, *coro_stash;
88	static SV *ucoro_state_sv;
89	static U32 ucoro_state_hash;
90	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
91		136
92	/* this is actually not only 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_TRACE = 0x02,
		148	CC_NOREUSE = 0x04, /* throw this away after tracing */
		149	};
		150
		151	/* this is a structure representing a c-level coroutine */
93	typedef struct {	152	typedef struct coro_cctx {
94	int refcnt; /* pointer reference counter */	153	struct coro_cctx *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		154
		155	/* the stack */
		156	void *sptr;
		157	size_t ssize;
		158
		159	/* cpu state */
		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 */
		162	JMPENV *top_env;
98	coro_context cctx;	163	coro_context cctx;
99		164
100	void *sptr;	165	#if CORO_USE_VALGRIND
101	long ssize; /* positive == mmap, otherwise malloc */	166	int valgrind_id;
102	} coro_stack;	167	#endif
		168	unsigned char flags;
		169	} coro_cctx;
103		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	};
		177
		178	/* this is a structure representing a perl-level coroutine */
104	struct coro {	179	struct coro {
105	/* the optional C context */	180	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	181	coro_cctx *cctx;
107	void *cursp;
108	int gencnt;
109
110	/* optionally saved, might be zero */
111	AV *defav;
112	SV *defsv;
113	SV *errsv;
114
115	/* saved global state not related to stacks */
116	U8 dowarn;
117	I32 in_eval;
118
119	/* the stacks and related info (callchain etc..) */
120	PERL_SI *curstackinfo;
121	AV *curstack;
122	AV *mainstack;
123	SV **stack_sp;
124	OP *op;
125	SV **curpad;
126	AV *comppad;
127	CV *compcv;
128	SV **stack_base;
129	SV **stack_max;
130	SV **tmps_stack;
131	I32 tmps_floor;
132	I32 tmps_ix;
133	I32 tmps_max;
134	I32 *markstack;
135	I32 *markstack_ptr;
136	I32 *markstack_max;
137	I32 *scopestack;
138	I32 scopestack_ix;
139	I32 scopestack_max;
140	ANY *savestack;
141	I32 savestack_ix;
142	I32 savestack_max;
143	OP **retstack;
144	I32 retstack_ix;
145	I32 retstack_max;
146	PMOP *curpm;
147	COP *curcop;
148	JMPENV *top_env;
149		182
150	/* data associated with this coroutine (initial args) */	183	/* data associated with this coroutine (initial args) */
151	AV *args;	184	AV *args;
		185	int refcnt;
		186	int save; /* CORO_SAVE flags */
		187	int flags; /* CF_ flags */
		188
		189	/* optionally saved, might be zero */
		190	AV *defav; /* @_ */
		191	SV *defsv; /* $_ */
		192	SV *errsv; /* $@ */
		193	GV *deffh; /* default filehandle */
		194	SV *irssv; /* $/ */
		195	SV *irssv_sv; /* real $/ cache */
		196
		197	#define VAR(name,type) type name;
		198	# include "state.h"
		199	#undef VAR
		200
		201	/* coro process data */
		202	int prio;
		203
		204	/* linked list */
		205	struct coro *next, *prev;
		206	HV *hv; /* the perl hash associated with this coro, if any */
152	};	207	};
153		208
154	typedef struct coro *Coro__State;	209	typedef struct coro *Coro__State;
155	typedef struct coro *Coro__State_or_hashref;	210	typedef struct coro *Coro__State_or_hashref;
156		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
157	static AV *	229	static AV *
158	coro_clone_padlist (pTHX_ CV *cv)	230	coro_clone_padlist (pTHX_ CV *cv)
159	{	231	{
160	AV *padlist = CvPADLIST (cv);	232	AV *padlist = CvPADLIST (cv);
161	AV *newpadlist, *newpad;	233	AV *newpadlist, *newpad;
162		234
163	newpadlist = newAV ();	235	newpadlist = newAV ();
164	AvREAL_off (newpadlist);	236	AvREAL_off (newpadlist);
165	#if PERL_VERSION < 9	237	#if PERL_VERSION_ATLEAST (5,9,0)
		238	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		239	#else
166	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	240	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
167	#else
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169	#endif	241	#endif
170	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	242	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
171	--AvFILLp (padlist);	243	--AvFILLp (padlist);
172		244
173	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	245	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
217		289
218	#define PERL_MAGIC_coro PERL_MAGIC_ext	290	#define PERL_MAGIC_coro PERL_MAGIC_ext
219		291
220	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	292	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221		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
222	/* the next two functions merely cache the padlists */	301	/* the next two functions merely cache the padlists */
223	static void	302	static void
224	get_padlist (pTHX_ CV *cv)	303	get_padlist (pTHX_ CV *cv)
225	{	304	{
226	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	305	MAGIC *mg = CORO_MAGIC (cv);
		306	AV *av;
227		307
228	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	308	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
229	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	309	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
230	else	310	else
231	{	311	{
232	#if 0	312	#if CORO_PREFER_PERL_FUNCTIONS
233	/* this should work - but it doesn't :( */	313	/* this is probably cleaner, but also slower? */
234	CV *cp = Perl_cv_clone (aTHX_ cv);	314	CV *cp = Perl_cv_clone (cv);
235	CvPADLIST (cv) = CvPADLIST (cp);	315	CvPADLIST (cv) = CvPADLIST (cp);
236	CvPADLIST (cp) = 0;	316	CvPADLIST (cp) = 0;
237	SvREFCNT_dec (cp);	317	SvREFCNT_dec (cp);
238	#else	318	#else
239	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	319	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
242	}	322	}
243		323
244	static void	324	static void
245	put_padlist (pTHX_ CV *cv)	325	put_padlist (pTHX_ CV *cv)
246	{	326	{
247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	327	MAGIC *mg = CORO_MAGIC (cv);
		328	AV *av;
248		329
249	if (!mg)	330	if (!mg)
250	{	331	{
251	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	332	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
252	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	333	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
253	mg->mg_virtual = &vtbl_coro;	334	mg->mg_virtual = &vtbl_coro;
254	mg->mg_obj = (SV *)newAV ();	335	mg->mg_obj = (SV *)newAV ();
255	}	336	}
256		337
257	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);
258	}	344	}
		345
		346	/** load & save, init *******************************************************/
259		347
260	#define SB do {	348	#define SB do {
261	#define SE } while (0)	349	#define SE } while (0)
262		350
263	#define LOAD(state) load_state(aTHX_ (state));
264	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
265
266	#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
267		352
268	static void	353	static void
269	load_state(pTHX_ Coro__State c)	354	load_perl (pTHX_ Coro__State c)
270	{	355	{
271	PL_dowarn = c->dowarn;	356	#define VAR(name,type) PL_ ## name = c->name;
272	PL_in_eval = c->in_eval;	357	# include "state.h"
273		358	#undef VAR
274	PL_curstackinfo = c->curstackinfo;
275	PL_curstack = c->curstack;
276	PL_mainstack = c->mainstack;
277	PL_stack_sp = c->stack_sp;
278	PL_op = c->op;
279	PL_curpad = c->curpad;
280	PL_comppad = c->comppad;
281	PL_compcv = c->compcv;
282	PL_stack_base = c->stack_base;
283	PL_stack_max = c->stack_max;
284	PL_tmps_stack = c->tmps_stack;
285	PL_tmps_floor = c->tmps_floor;
286	PL_tmps_ix = c->tmps_ix;
287	PL_tmps_max = c->tmps_max;
288	PL_markstack = c->markstack;
289	PL_markstack_ptr = c->markstack_ptr;
290	PL_markstack_max = c->markstack_max;
291	PL_scopestack = c->scopestack;
292	PL_scopestack_ix = c->scopestack_ix;
293	PL_scopestack_max = c->scopestack_max;
294	PL_savestack = c->savestack;
295	PL_savestack_ix = c->savestack_ix;
296	PL_savestack_max = c->savestack_max;
297	#if PERL_VERSION < 9
298	PL_retstack = c->retstack;
299	PL_retstack_ix = c->retstack_ix;
300	PL_retstack_max = c->retstack_max;
301	#endif
302	PL_curpm = c->curpm;
303	PL_curcop = c->curcop;
304	PL_top_env = c->top_env;
305		359
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	360	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	361	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	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	}
309		379
310	{	380	{
311	dSP;	381	dSP;
312	CV *cv;	382	CV *cv;
313		383
314	/* now do the ugly restore mess */	384	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	385	while ((cv = (CV *)POPs))
316	{	386	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	387	put_padlist (aTHX_ cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	388	CvDEPTH (cv) = PTR2IV (POPs);
323	}	389	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	390	}
327		391
328	PUTBACK;	392	PUTBACK;
329	}	393	}
330	}	394	}
331		395
332	static void	396	static void
333	save_state(pTHX_ Coro__State c, int flags)	397	save_perl (pTHX_ Coro__State c)
334	{	398	{
335	{	399	{
336	dSP;	400	dSP;
337	I32 cxix = cxstack_ix;	401	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	402	PERL_CONTEXT *ccstk = cxstack;
…		…
341	/*	405	/*
342	* 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
343	* (and reinitialize) all cv's in the whole callchain :(	407	* (and reinitialize) all cv's in the whole callchain :(
344	*/	408	*/
345		409
346	PUSHs (Nullsv);	410	XPUSHs (Nullsv);
347	/* this loop was inspired by pp_caller */	411	/* this loop was inspired by pp_caller */
348	for (;;)	412	for (;;)
349	{	413	{
350	while (cxix >= 0)	414	while (cxix >= 0)
351	{	415	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	416	PERL_CONTEXT *cx = &ccstk[cxix--];
353		417
354	if (CxTYPE(cx) == CXt_SUB)	418	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
355	{	419	{
356	CV *cv = cx->blk_sub.cv;	420	CV *cv = cx->blk_sub.cv;
		421
357	if (CvDEPTH(cv))	422	if (CvDEPTH (cv))
358	{	423	{
359	EXTEND (SP, CvDEPTH(cv)*2);	424	EXTEND (SP, 3);
360
361	while (--CvDEPTH(cv))
362	{
363	/* this tells the restore code to increment CvDEPTH */
364	PUSHs (Nullsv);
365	PUSHs ((SV *)cv);
366	}
367
368	PUSHs ((SV *)CvPADLIST(cv));	425	PUSHs ((SV *)CvPADLIST (cv));
		426	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	427	PUSHs ((SV *)cv);
370		428
		429	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	430	get_padlist (aTHX_ cv);
372	}	431	}
373	}	432	}
374	#ifdef CXt_FORMAT
375	else if (CxTYPE(cx) == CXt_FORMAT)
376	{
377	/* I never used formats, so how should I know how these are implemented? */
378	/* my bold guess is as a simple, plain sub... */
379	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
380	}
381	#endif
382	}	433	}
383		434
384	if (top_si->si_type == PERLSI_MAIN)	435	if (top_si->si_type == PERLSI_MAIN)
385	break;	436	break;
386		437
387	top_si = top_si->si_prev;	438	top_si = top_si->si_prev;
388	ccstk = top_si->si_cxstack;	439	ccstk = top_si->si_cxstack;
389	cxix = top_si->si_cxix;	440	cxix = top_si->si_cxix;
390	}	441	}
391		442
392	PUTBACK;	443	PUTBACK;
393	}	444	}
394		445
395	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;
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	447	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
397	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;
398		451
399	c->dowarn = PL_dowarn;	452	#define VAR(name,type)c->name = PL_ ## name;
400	c->in_eval = PL_in_eval;	453	# include "state.h"
401		454	#undef VAR
402	c->curstackinfo = PL_curstackinfo;
403	c->curstack = PL_curstack;
404	c->mainstack = PL_mainstack;
405	c->stack_sp = PL_stack_sp;
406	c->op = PL_op;
407	c->curpad = PL_curpad;
408	c->comppad = PL_comppad;
409	c->compcv = PL_compcv;
410	c->stack_base = PL_stack_base;
411	c->stack_max = PL_stack_max;
412	c->tmps_stack = PL_tmps_stack;
413	c->tmps_floor = PL_tmps_floor;
414	c->tmps_ix = PL_tmps_ix;
415	c->tmps_max = PL_tmps_max;
416	c->markstack = PL_markstack;
417	c->markstack_ptr = PL_markstack_ptr;
418	c->markstack_max = PL_markstack_max;
419	c->scopestack = PL_scopestack;
420	c->scopestack_ix = PL_scopestack_ix;
421	c->scopestack_max = PL_scopestack_max;
422	c->savestack = PL_savestack;
423	c->savestack_ix = PL_savestack_ix;
424	c->savestack_max = PL_savestack_max;
425	#if PERL_VERSION < 9
426	c->retstack = PL_retstack;
427	c->retstack_ix = PL_retstack_ix;
428	c->retstack_max = PL_retstack_max;
429	#endif
430	c->curpm = PL_curpm;
431	c->curcop = PL_curcop;
432	c->top_env = PL_top_env;
433	}	455	}
434		456
435	/*	457	/*
436	* allocate various perl stacks. This is an exact copy	458	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	459	* of perl.c:init_stacks, except that it uses less memory
438	* on the (sometimes correct) assumption that coroutines do	460	* on the (sometimes correct) assumption that coroutines do
439	* not usually need a lot of stackspace.	461	* not usually need a lot of stackspace.
440	*/	462	*/
		463	#if CORO_PREFER_PERL_FUNCTIONS
		464	# define coro_init_stacks init_stacks
		465	#else
441	static void	466	static void
442	coro_init_stacks (pTHX)	467	coro_init_stacks (pTHX)
443	{	468	{
444	LOCK;	469	PL_curstackinfo = new_stackinfo(64, 6);
445
446	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
447	PL_curstackinfo->si_type = PERLSI_MAIN;	470	PL_curstackinfo->si_type = PERLSI_MAIN;
448	PL_curstack = PL_curstackinfo->si_stack;	471	PL_curstack = PL_curstackinfo->si_stack;
449	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	472	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
450		473
451	PL_stack_base = AvARRAY(PL_curstack);	474	PL_stack_base = AvARRAY(PL_curstack);
452	PL_stack_sp = PL_stack_base;	475	PL_stack_sp = PL_stack_base;
453	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	476	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
454		477
455	New(50,PL_tmps_stack,96,SV*);	478	New(50,PL_tmps_stack,64,SV*);
456	PL_tmps_floor = -1;	479	PL_tmps_floor = -1;
457	PL_tmps_ix = -1;	480	PL_tmps_ix = -1;
458	PL_tmps_max = 96;	481	PL_tmps_max = 64;
459		482
460	New(54,PL_markstack,16,I32);	483	New(54,PL_markstack,16,I32);
461	PL_markstack_ptr = PL_markstack;	484	PL_markstack_ptr = PL_markstack;
462	PL_markstack_max = PL_markstack + 16;	485	PL_markstack_max = PL_markstack + 16;
463		486
…		…
467		490
468	New(54,PL_scopestack,16,I32);	491	New(54,PL_scopestack,16,I32);
469	PL_scopestack_ix = 0;	492	PL_scopestack_ix = 0;
470	PL_scopestack_max = 16;	493	PL_scopestack_max = 16;
471		494
472	New(54,PL_savestack,96,ANY);	495	New(54,PL_savestack,64,ANY);
473	PL_savestack_ix = 0;	496	PL_savestack_ix = 0;
474	PL_savestack_max = 96;	497	PL_savestack_max = 64;
475		498
476	#if PERL_VERSION < 9	499	#if !PERL_VERSION_ATLEAST (5,9,0)
477	New(54,PL_retstack,8,OP*);	500	New(54,PL_retstack,4,OP*);
478	PL_retstack_ix = 0;	501	PL_retstack_ix = 0;
479	PL_retstack_max = 8;	502	PL_retstack_max = 4;
480	#endif	503	#endif
481
482	UNLOCK;
483	}	504	}
		505	#endif
484		506
485	/*	507	/*
486	* destroy the stacks, the callchain etc...	508	* destroy the stacks, the callchain etc...
487	*/	509	*/
488	static void	510	static void
489	destroy_stacks(pTHX)	511	coro_destroy_stacks (pTHX)
490	{	512	{
491	if (!IN_DESTRUCT)	513	if (!IN_DESTRUCT)
492	{	514	{
493	/* is this ugly, I ask? */	515	/* restore all saved variables and stuff */
494	LEAVE_SCOPE (0);	516	LEAVE_SCOPE (0);
		517	assert (PL_tmps_floor == -1);
495		518
496	/* sure it is, but more important: is it correct?? :/ */	519	/* free all temporaries */
497	FREETMPS;	520	FREETMPS;
		521	assert (PL_tmps_ix == -1);
498		522
		523	/* unwind all extra stacks */
499	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	524	POPSTACK_TO (PL_mainstack);
		525
		526	/* unwind main stack */
		527	dounwind (-1);
500	}	528	}
501		529
502	while (PL_curstackinfo->si_next)	530	while (PL_curstackinfo->si_next)
503	PL_curstackinfo = PL_curstackinfo->si_next;	531	PL_curstackinfo = PL_curstackinfo->si_next;
504		532
505	while (PL_curstackinfo)	533	while (PL_curstackinfo)
506	{	534	{
507	PERL_SI *p = PL_curstackinfo->si_prev;	535	PERL_SI *p = PL_curstackinfo->si_prev;
508		536
509	{ /*D*//*remove*/
510	dSP;
511	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
512	PUTBACK; /* possibly superfluous */
513	}
514
515	if (!IN_DESTRUCT)	537	if (!IN_DESTRUCT)
516	{
517	dounwind (-1);/*D*//*remove*/
518	SvREFCNT_dec (PL_curstackinfo->si_stack);	538	SvREFCNT_dec (PL_curstackinfo->si_stack);
519	}
520		539
521	Safefree (PL_curstackinfo->si_cxstack);	540	Safefree (PL_curstackinfo->si_cxstack);
522	Safefree (PL_curstackinfo);	541	Safefree (PL_curstackinfo);
523	PL_curstackinfo = p;	542	PL_curstackinfo = p;
524	}	543	}
525		544
526	Safefree (PL_tmps_stack);	545	Safefree (PL_tmps_stack);
527	Safefree (PL_markstack);	546	Safefree (PL_markstack);
528	Safefree (PL_scopestack);	547	Safefree (PL_scopestack);
529	Safefree (PL_savestack);	548	Safefree (PL_savestack);
530	#if PERL_VERSION < 9	549	#if !PERL_VERSION_ATLEAST (5,9,0)
531	Safefree (PL_retstack);	550	Safefree (PL_retstack);
532	#endif	551	#endif
533	}	552	}
534		553
535	static void	554	static size_t
536	allocate_stack (Coro__State ctx, int alloc)	555	coro_rss (struct coro *coro)
537	{	556	{
538	coro_stack *stack;	557	size_t rss = sizeof (coro);
539		558
540	New (0, stack, 1, coro_stack);	559	if (coro->mainstack)
541
542	stack->refcnt = 1;
543	stack->usecnt = 1;
544	stack->gencnt = ctx->gencnt = 0;
545
546	if (alloc)
547	{	560	{
548	#if HAVE_MMAP	561	if (coro->flags & CF_RUNNING)
549	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
551	if (stack->sptr != (void *)-1)
552	{	562	{
553	# if STACKGUARD	563	#define VAR(name,type)coro->name = PL_ ## name;
554	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	564	# include "state.h"
555	# endif	565	#undef VAR
556	}	566	}
557	else
558	#endif
559	{
560	stack->ssize = - (STACKSIZE * (long)sizeof (long));
561	New (0, stack->sptr, STACKSIZE, long);
562	}
563	}
564	else
565	stack->sptr = 0;
566		567
567	ctx->stack = stack;	568	rss += sizeof (coro->curstackinfo);
568	}	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);
569		576
570	static void	577	#if !PERL_VERSION_ATLEAST (5,9,0)
571	deallocate_stack (Coro__State ctx)	578	rss += coro->retstack_max * sizeof (OP *);
572	{	579	#endif
573	coro_stack *stack = ctx->stack;
574
575	ctx->stack = 0;
576
577	if (stack)
578	{	580	}
579	if (!--stack->refcnt)
580	{
581	#ifdef HAVE_MMAP
582	if (stack->ssize > 0 && stack->sptr)
583	munmap (stack->sptr, stack->ssize);
584	else
585	#endif
586	Safefree (stack->sptr);
587		581
588	Safefree (stack);	582	return rss;
589	}
590	else if (ctx->gencnt == stack->gencnt)
591	--stack->usecnt;
592	}
593	}	583	}
594		584
		585	/** coroutine stack handling ************************************************/
		586
595	static void	587	static void
596	setup_coro (void *arg)	588	setup_coro (pTHX_ struct coro *coro)
597	{	589	{
598	/*	590	/*
599	* emulate part of the perl startup here.	591	* emulate part of the perl startup here.
600	*/	592	*/
		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	{
		682	dSP;
		683	LOGOP myop;
		684
		685	PL_top_env = &PL_start_env;
		686
		687	if (cctx->flags & CC_TRACE)
		688	PL_runops = runops_coro;
		689
		690	Zero (&myop, 1, LOGOP);
		691	myop.op_next = PL_op;
		692	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		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;
		699	PL_op = (OP *)&myop;
		700	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		701	SPAGAIN;
		702	}
		703
		704	/*
		705	* this is a _very_ stripped down perl interpreter ;)
		706	*/
		707	static void
		708	coro_run (void *arg)
		709	{
601	dTHX;	710	dTHX;
602	dSP;
603	Coro__State ctx = (Coro__State)arg;
604	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
605		711
606	coro_init_stacks (aTHX);	712	/* coro_run is the alternative tail of transfer(), so unlock here. */
607	/*PL_curcop = 0;*/	713	UNLOCK;
608	/*PL_in_eval = PL_in_eval;*/ /* inherit */
609	SvREFCNT_dec (GvAV (PL_defgv));
610	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
611		714
612	SPAGAIN;	715	/* we now skip the entersub that lead to transfer() */
		716	PL_op = PL_op->op_next;
613		717
614	if (ctx->stack)	718	/* inject a fake subroutine call to cctx_init */
615	{	719	prepare_cctx (aTHX_ (coro_cctx *)arg);
616	ctx->cursp = 0;
617		720
618	PUSHMARK(SP);	721	/* somebody or something will hit me for both perl_run and PL_restartop */
619	PUTBACK;	722	PL_restartop = PL_op;
620	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	723	perl_run (PL_curinterp);
621		724
622	if (SvTRUE (ERRSV))	725	/*
623	croak (NULL);	726	* If perl-run returns we assume exit() was being called or the coro
624	else	727	* fell off the end, which seems to be the only valid (non-bug)
625	croak ("FATAL: CCTXT coroutine returned!");	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
		731	*/
		732	PL_top_env = main_top_env;
		733	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		734	}
		735
		736	static coro_cctx *
		737	cctx_new ()
		738	{
		739	coro_cctx *cctx;
		740	void *stack_start;
		741	size_t stack_size;
		742
		743	++cctx_count;
		744
		745	Newz (0, cctx, 1, coro_cctx);
		746
		747	#if HAVE_MMAP
		748
		749	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		750	/* mmap supposedly does allocate-on-write for us */
		751	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		752
		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;
626	}	761	}
627	else	762	else
628	{	763	#endif
629	UNOP myop;
630
631	Zero(&myop, 1, UNOP);
632	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;
634
635	PL_op = (OP *)&myop;
636
637	PUSHMARK(SP);
638	XPUSHs (sub_init);
639	/*
640	* the next line is slightly wrong, as PL_op->op_next
641	* is actually being executed so we skip the first op.
642	* that doesn't matter, though, since it is only
643	* pp_nextstate and we never return...
644	* ah yes, and I don't care anyways ;)
645	*/
646	PUTBACK;
647	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
648	SPAGAIN;
649
650	ENTER; /* necessary e.g. for dounwind */
651	}	764	{
652	}	765	cctx->ssize = coro_stacksize * (long)sizeof (long);
		766	New (0, cctx->sptr, coro_stacksize, long);
653		767
654	static void	768	if (!cctx->sptr)
655	continue_coro (void *arg)	769	{
656	{	770	perror ("FATAL: unable to allocate stack for coroutine");
657	/*	771	_exit (EXIT_FAILURE);
658	* this is a _very_ stripped down perl interpreter ;)	772	}
659	*/
660	dTHX;
661	Coro__State ctx = (Coro__State)arg;
662		773
663	PL_top_env = &PL_start_env;	774	stack_start = cctx->sptr;
		775	stack_size = cctx->ssize;
		776	}
664		777
665	ctx->cursp = 0;	778	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
666	PL_op = PL_op->op_next;	779	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
667	CALLRUNOPS(aTHX);
668		780
669	abort ();	781	return cctx;
670	}	782	}
		783
		784	static void
		785	cctx_destroy (coro_cctx *cctx)
		786	{
		787	if (!cctx)
		788	return;
		789
		790	--cctx_count;
		791
		792	#if CORO_USE_VALGRIND
		793	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		794	#endif
		795
		796	#if HAVE_MMAP
		797	if (cctx->flags & CC_MAPPED)
		798	munmap (cctx->sptr, cctx->ssize);
		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)
		810	{
		811	coro_cctx *cctx = cctx_first;
		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);
		819	}
		820
		821	return cctx_new ();
		822	}
		823
		824	static void
		825	cctx_put (coro_cctx *cctx)
		826	{
		827	/* free another cctx if overlimit */
		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;
		840	}
		841
		842	/** coroutine switching *****************************************************/
671		843
672	/* never call directly, always through the coro_state_transfer global variable */	844	/* never call directly, always through the coro_state_transfer global variable */
673	static void	845	static void NOINLINE
674	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	846	transfer (pTHX_ struct coro *prev, struct coro *next)
675	{	847	{
676	dSTACKLEVEL;	848	dSTACKLEVEL;
677		849
		850	/* sometimes transfer is only called to set idle_sp */
		851	if (!next)
		852	{
		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	}
678	if (prev != next)	856	else if (prev != next)
679	{	857	{
680	/* has this coro been created yet? */	858	coro_cctx *prev__cctx;
681	if (next->mainstack)	859
		860	if (prev->flags & CF_NEW)
682	{	861	{
683	LOCK;	862	/* create a new empty context */
684	SAVE (prev, flags);	863	Newz (0, prev->cctx, 1, coro_cctx);
685	LOAD (next);	864	prev->flags &= ~CF_NEW;
686	UNLOCK;	865	prev->flags |= CF_RUNNING;
687
688	/* mark this state as in-use */
689	next->mainstack = 0;
690	next->tmps_ix = -2;
691
692	/* stacklevel changed? if yes, grab the stack for us! */
693	if (flags & TRANSFER_SAVE_CCTXT)
694	{
695	if (!prev->stack)
696	allocate_stack (prev, 0);
697	else if (prev->cursp != stacklevel
698	&& prev->stack->usecnt > 1)
699	{
700	prev->gencnt = ++prev->stack->gencnt;
701	prev->stack->usecnt = 1;
702	}
703
704	/* has our stack been invalidated? */
705	if (next->stack && next->stack->gencnt != next->gencnt)
706	{
707	deallocate_stack (next);
708	allocate_stack (next, 1);
709	coro_create (&(next->stack->cctx),
710	continue_coro, (void *)next,
711	next->stack->sptr, labs (next->stack->ssize));
712	}
713
714	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715	prev->cursp = stacklevel;
716	/* don't add any code here */
717	}
718	else
719	next->cursp = stacklevel;
720	}	866	}
721	else if (next->tmps_ix == -2)	867
722	croak ("tried to transfer to running coroutine");	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;
		880
		881	LOCK;
		882
		883	if (next->flags & CF_NEW)
		884	{
		885	/* need to start coroutine */
		886	next->flags &= ~CF_NEW;
		887	/* first get rid of the old state */
		888	save_perl (aTHX_ prev);
		889	/* setup coroutine call */
		890	setup_coro (aTHX_ next);
		891	}
723	else	892	else
724	{	893	{
725	LOCK;	894	/* coroutine already started */
726	SAVE (prev, -1); /* first get rid of the old state */	895	save_perl (aTHX_ prev);
727	UNLOCK;	896	load_perl (aTHX_ next);
728
729	/* create the coroutine for the first time */
730	if (flags & TRANSFER_SAVE_CCTXT)
731	{
732	if (!prev->stack)
733	allocate_stack (prev, 0);
734
735	/* the new coroutine starts with start_env again */
736	PL_top_env = &PL_start_env;
737
738	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
739	{
740	setup_coro (next);
741	next->cursp = stacklevel;
742
743	prev->stack->refcnt++;
744	prev->stack->usecnt++;
745	next->stack = prev->stack;
746	next->gencnt = prev->gencnt;
747	}
748	else
749	{
750	assert (!next->stack);
751	allocate_stack (next, 1);
752	coro_create (&(next->stack->cctx),
753	setup_coro, (void *)next,
754	next->stack->sptr, labs (next->stack->ssize));
755	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
756	prev->cursp = stacklevel;
757	/* don't add any code here */
758	}
759	}
760	else
761	{
762	setup_coro (next);
763	next->cursp = stacklevel;
764	}
765	}	897	}
766	}
767		898
768	LOCK;	899	prev__cctx = prev->cctx;
769	if (coro_mortal)	900
770	{	901	/* possibly "free" the cctx */
771	SvREFCNT_dec (coro_mortal);	902	if (prev__cctx->idle_sp == STACKLEVEL)
772	coro_mortal = 0;	903	{
773	}	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
		907	prev->cctx = 0;
		908
		909	cctx_put (prev__cctx);
		910	}
		911
		912	if (!next->cctx)
		913	next->cctx = cctx_get (aTHX);
		914
		915	if (prev__cctx != next->cctx)
		916	{
		917	prev__cctx->top_env = PL_top_env;
		918	PL_top_env = next->cctx->top_env;
		919	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		920	}
		921
		922	free_coro_mortal (aTHX);
774	UNLOCK;	923	UNLOCK;
		924	}
775	}	925	}
776		926
777	/* use this function pointer to call the above function */	927	struct transfer_args
778	/* this is done to increase chances of the compiler not inlining the call */	928	{
779	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	929	struct coro *prev, *next;
		930	};
780		931
781	#define SV_CORO(sv,func) \	932	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
782	do { \
783	if (SvROK (sv)) \
784	sv = SvRV (sv); \
785	\
786	if (SvTYPE (sv) == SVt_PVHV) \
787	{ \
788	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
789	\
790	if (!he) \
791	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
792	\
793	(sv) = SvRV (HeVAL(he)); \
794	} \
795	\
796	/* must also be changed inside Coro::Cont::yield */ \
797	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
798	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
799	\
800	} while(0)
801		933
802	#define SvSTATE(sv) INT2PTR (struct coro *, SvIVX (sv))	934	/** high level stuff ********************************************************/
803		935
804	static void	936	static int
		937	coro_state_destroy (pTHX_ struct coro *coro)
		938	{
		939	if (coro->flags & CF_DESTROYED)
		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 */
		954
		955	if (coro->mainstack && coro->mainstack != main_mainstack)
		956	{
		957	struct coro temp;
		958
		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);
		968	load_perl (aTHX_ coro);
		969
		970	coro_destroy_stacks (aTHX);
		971
		972	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		973
		974	coro->mainstack = 0;
		975	}
		976
		977	cctx_destroy (coro->cctx);
		978	SvREFCNT_dec (coro->args);
		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;
		985	}
		986
		987	static int
		988	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		989	{
		990	struct coro *coro = (struct coro *)mg->mg_ptr;
		991	mg->mg_ptr = 0;
		992
		993	coro->hv = 0;
		994
		995	if (--coro->refcnt < 0)
		996	{
		997	coro_state_destroy (aTHX_ coro);
		998	Safefree (coro);
		999	}
		1000
		1001	return 0;
		1002	}
		1003
		1004	static int
		1005	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1006	{
		1007	struct coro *coro = (struct coro *)mg->mg_ptr;
		1008
		1009	++coro->refcnt;
		1010
		1011	return 0;
		1012	}
		1013
		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	};
		1024
		1025	static struct coro *
		1026	SvSTATE_ (pTHX_ SV *coro)
		1027	{
		1028	HV *stash;
		1029	MAGIC *mg;
		1030
		1031	if (SvROK (coro))
		1032	coro = SvRV (coro);
		1033
		1034	stash = SvSTASH (coro);
		1035	if (stash != coro_stash && stash != coro_state_stash)
		1036	{
		1037	/* very slow, but rare, check */
		1038	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		1039	croak ("Coro::State object required");
		1040	}
		1041
		1042	mg = CORO_MAGIC (coro);
		1043	return (struct coro *)mg->mg_ptr;
		1044	}
		1045
		1046	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1047
		1048	static void
		1049	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1050	{
		1051	ta->prev = SvSTATE (prev_sv);
		1052	ta->next = SvSTATE (next_sv);
		1053	}
		1054
		1055	static void
805	api_transfer (pTHX_ SV *prev, SV *next, int flags)	1056	api_transfer (SV *prev_sv, SV *next_sv)
806	{	1057	{
807	SV_CORO (prev, "Coro::transfer");	1058	dTHX;
808	SV_CORO (next, "Coro::transfer");	1059	struct transfer_args ta;
809		1060
810	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1061	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1062	TRANSFER (ta);
		1063	}
		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;
811	}	1076	}
812		1077
813	/** Coro ********************************************************************/	1078	/** Coro ********************************************************************/
814		1079
815	#define PRIO_MAX 3
816	#define PRIO_HIGH 1
817	#define PRIO_NORMAL 0
818	#define PRIO_LOW -1
819	#define PRIO_IDLE -3
820	#define PRIO_MIN -4
821
822	/* for Coro.pm */
823	static GV *coro_current, *coro_idle;
824	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
825	static int coro_nready;
826
827	static void	1080	static void
828	coro_enq (pTHX_ SV *sv)	1081	coro_enq (pTHX_ SV *coro_sv)
829	{	1082	{
830	SV **xprio;
831	int prio;
832
833	if (SvTYPE (sv) != SVt_PVHV)
834	croak ("Coro::ready tried to enqueue something that is not a coroutine");
835
836	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
837	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
838
839	prio = prio > PRIO_MAX ? PRIO_MAX
840	: prio < PRIO_MIN ? PRIO_MIN
841	: prio;
842
843	av_push (coro_ready [prio - PRIO_MIN], sv);	1083	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
844	coro_nready++;
845	}	1084	}
846		1085
847	static SV *	1086	static SV *
848	coro_deq (pTHX_ int min_prio)	1087	coro_deq (pTHX_ int min_prio)
849	{	1088	{
…		…
853	if (min_prio < 0)	1092	if (min_prio < 0)
854	min_prio = 0;	1093	min_prio = 0;
855		1094
856	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1095	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
857	if (AvFILLp (coro_ready [prio]) >= 0)	1096	if (AvFILLp (coro_ready [prio]) >= 0)
858	{
859	coro_nready--;
860	return av_shift (coro_ready [prio]);	1097	return av_shift (coro_ready [prio]);
861	}
862		1098
863	return 0;	1099	return 0;
864	}	1100	}
865		1101
866	static void	1102	static int
867	api_ready (SV *coro)	1103	api_ready (SV *coro_sv)
868	{	1104	{
869	dTHX;	1105	dTHX;
		1106	struct coro *coro;
870		1107
871	if (SvROK (coro))	1108	if (SvROK (coro_sv))
872	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;
873		1117
874	LOCK;	1118	LOCK;
875	coro_enq (aTHX_ SvREFCNT_inc (coro));	1119	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1120	++coro_nready;
876	UNLOCK;	1121	UNLOCK;
		1122
		1123	return 1;
		1124	}
		1125
		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
		1134	prepare_schedule (pTHX_ struct transfer_args *ta)
		1135	{
		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;
		1184
		1185	LOCK;
		1186	free_coro_mortal (aTHX);
		1187	coro_mortal = prev_sv;
		1188	UNLOCK;
		1189	}
		1190
		1191	static void
		1192	prepare_cede (pTHX_ struct transfer_args *ta)
		1193	{
		1194	api_ready (coro_current);
		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;
877	}	1210	}
878		1211
879	static void	1212	static void
880	api_schedule (void)	1213	api_schedule (void)
881	{	1214	{
882	dTHX;	1215	dTHX;
		1216	struct transfer_args ta;
883		1217
884	SV *prev, *next;	1218	prepare_schedule (aTHX_ &ta);
885		1219	TRANSFER (ta);
886	LOCK;
887
888	prev = SvRV (GvSV (coro_current));
889	next = coro_deq (aTHX_ PRIO_MIN);
890
891	if (!next)
892	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
893
894	/* free this only after the transfer */
895	coro_mortal = prev;
896	SV_CORO (prev, "Coro::schedule");
897
898	SvRV (GvSV (coro_current)) = next;
899
900	SV_CORO (next, "Coro::schedule");
901
902	UNLOCK;
903
904	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
905	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
906	}	1220	}
907		1221
908	static void	1222	static int
909	api_cede (void)	1223	api_cede (void)
910	{	1224	{
911	dTHX;	1225	dTHX;
		1226	struct transfer_args ta;
912		1227
913	LOCK;	1228	prepare_cede (aTHX_ &ta);
914	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
915	UNLOCK;
916		1229
917	api_schedule ();	1230	if (ta.prev != ta.next)
		1231	{
		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;
918	}	1252	}
919		1253
920	MODULE = Coro::State PACKAGE = Coro::State	1254	MODULE = Coro::State PACKAGE = Coro::State
921		1255
922	PROTOTYPES: ENABLE	1256	PROTOTYPES: DISABLE
923		1257
924	BOOT:	1258	BOOT:
925	{ /* {} necessary for stoopid perl-5.6.x */	1259	{
926	#ifdef USE_ITHREADS	1260	#ifdef USE_ITHREADS
927	MUTEX_INIT (&coro_mutex);	1261	MUTEX_INIT (&coro_mutex);
928	#endif	1262	#endif
929	BOOT_PAGESIZE;	1263	BOOT_PAGESIZE;
930		1264
931	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
932	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
933	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1265	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
934		1266
935	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1267	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
936	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1268	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
937	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));
938	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1272	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1273	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
939		1274
940	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;
941		1280
942	coroapi.ver = CORO_API_VERSION;	1281	coroapi.ver = CORO_API_VERSION;
943	coroapi.transfer = api_transfer;	1282	coroapi.transfer = api_transfer;
944	}
945		1283
946	Coro::State	1284	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
947	_newprocess(args)	1285	}
948	SV * args	1286
949	PROTOTYPE: $	1287	SV *
		1288	new (char *klass, ...)
950	CODE:	1289	CODE:
951	Coro__State coro;	1290	{
		1291	struct coro *coro;
		1292	HV *hv;
		1293	int i;
952		1294
953	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
954	croak ("Coro::State::_newprocess expects an arrayref");
955
956	Newz (0, coro, 1, struct coro);	1295	Newz (0, coro, 1, struct coro);
		1296	coro->args = newAV ();
		1297	coro->save = CORO_SAVE_DEF;
		1298	coro->flags = CF_NEW;
957		1299
958	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1300	if (coro_first) coro_first->prev = coro;
959	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1301	coro->next = coro_first;
960	/*coro->stack = 0;*/	1302	coro_first = coro;
961		1303
962	RETVAL = coro;	1304	coro->hv = hv = newHV ();
		1305	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1306	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1307
		1308	for (i = 1; i < items; i++)
		1309	av_push (coro->args, newSVsv (ST (i)));
		1310	}
963	OUTPUT:	1311	OUTPUT:
964	RETVAL	1312	RETVAL
965		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
966	void	1332	void
967	transfer(prev, next, flags)	1333	_set_stacklevel (...)
968	SV *prev	1334	ALIAS:
969	SV *next	1335	Coro::State::transfer = 1
970	int flags	1336	Coro::schedule = 2
971	PROTOTYPE: @	1337	Coro::cede = 3
		1338	Coro::cede_notself = 4
972	CODE:	1339	CODE:
973	PUTBACK;	1340	{
974	SV_CORO (next, "Coro::transfer");	1341	struct transfer_args ta;
975	SV_CORO (prev, "Coro::transfer");	1342
976	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1343	switch (ix)
977	SPAGAIN;	1344	{
		1345	case 0:
		1346	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1347	ta.next = 0;
		1348	break;
		1349
		1350	case 1:
		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));
		1355	break;
		1356
		1357	case 2:
		1358	prepare_schedule (aTHX_ &ta);
		1359	break;
		1360
		1361	case 3:
		1362	prepare_cede (aTHX_ &ta);
		1363	break;
		1364
		1365	case 4:
		1366	if (!prepare_cede_notself (aTHX_ &ta))
		1367	XSRETURN_EMPTY;
		1368
		1369	break;
		1370	}
		1371
		1372	BARRIER;
		1373	TRANSFER (ta);
		1374
		1375	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1376	XSRETURN_YES;
		1377	}
		1378
		1379	bool
		1380	_destroy (SV *coro_sv)
		1381	CODE:
		1382	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1383	OUTPUT:
		1384	RETVAL
978		1385
979	void	1386	void
980	DESTROY(coro)
981	Coro::State coro
982	CODE:
983
984	if (coro->mainstack && coro->mainstack != main_mainstack)
985	{
986	struct coro temp;
987
988	PUTBACK;
989	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
990	LOAD (aTHX_ coro);
991	SPAGAIN;
992
993	destroy_stacks (aTHX);
994
995	LOAD ((&temp)); /* this will get rid of defsv etc.. */
996	SPAGAIN;
997
998	coro->mainstack = 0;
999	}
1000
1001	deallocate_stack (coro);
1002	SvREFCNT_dec (coro->args);
1003	Safefree (coro);
1004
1005	void
1006	_exit(code)	1387	_exit (code)
1007	int code	1388	int code
1008	PROTOTYPE: $	1389	PROTOTYPE: $
1009	CODE:	1390	CODE:
1010	_exit (code);	1391	_exit (code);
1011		1392
1012	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
1013		1415
1014	void	1416	void
1015	yield(...)	1417	list ()
1016	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->flags & CF_RUNNING)
		1487	croak ("cannot enable tracing on running coroutine");
		1488
		1489	if (coro->cctx)
		1490	croak ("cannot enable tracing on coroutine with custom stack");
		1491
		1492	coro->cctx = cctx_new ();
		1493	coro->cctx->flags |= CC_TRACE;
		1494	}
		1495	else
		1496	if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1497	{
		1498	coro->cctx->flags &= ~CC_TRACE;
		1499	coro->cctx->flags |= CC_NOREUSE;
		1500	}
		1501
		1502	SV *
		1503	has_stack (Coro::State coro)
		1504	PROTOTYPE: $
		1505	CODE:
		1506	RETVAL = boolSV (!!coro->cctx);
		1507	OUTPUT:
		1508	RETVAL
		1509
		1510	IV
		1511	rss (Coro::State coro)
		1512	PROTOTYPE: $
1017	CODE:	1513	CODE:
1018	SV *yieldstack;	1514	RETVAL = coro_rss (coro);
1019	SV *sv;	1515	OUTPUT:
1020	AV *defav = GvAV (PL_defgv);	1516	RETVAL
1021	struct coro *prev, *next;
1022		1517
1023	yieldstack = *hv_fetch (
1024	(HV *)SvRV (GvSV (coro_current)),
1025	"yieldstack", sizeof ("yieldstack") - 1,
1026	0
1027	);
1028
1029	/* set up @_ -- ugly */
1030	av_clear (defav);
1031	av_fill (defav, items - 1);
1032	while (items--)
1033	av_store (defav, items, SvREFCNT_inc (ST(items)));
1034
1035	sv = av_pop ((AV *)SvRV (yieldstack));
1036	prev = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1037	next = SvSTATE ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1038	SvREFCNT_dec (sv);
1039
1040	coro_state_transfer (aTHX_ prev, next, 0);
1041		1518
1042	MODULE = Coro::State PACKAGE = Coro	1519	MODULE = Coro::State PACKAGE = Coro
1043		1520
1044	BOOT:	1521	BOOT:
1045	{	1522	{
1046	int i;	1523	int i;
		1524
		1525	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1526	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1527	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1528
		1529	coro_current = get_sv ("Coro::current", FALSE);
		1530	SvREADONLY_on (coro_current);
		1531
1047	HV *stash = gv_stashpv ("Coro", TRUE);	1532	coro_stash = gv_stashpv ("Coro", TRUE);
1048		1533
1049	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1534	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1050	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1535	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1051	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1536	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1052	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1537	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1053	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1538	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1054	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1539	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1055
1056	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1057	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1058		1540
1059	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1541	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1060	coro_ready[i] = newAV ();	1542	coro_ready[i] = newAV ();
1061		1543
1062	{	1544	{
1063	SV *sv = perl_get_sv("Coro::API", 1);	1545	SV *sv = perl_get_sv("Coro::API", 1);
1064		1546
1065	coroapi.schedule = api_schedule;	1547	coroapi.schedule = api_schedule;
		1548	coroapi.save = api_save;
1066	coroapi.cede = api_cede;	1549	coroapi.cede = api_cede;
		1550	coroapi.cede_notself = api_cede_notself;
1067	coroapi.ready = api_ready;	1551	coroapi.ready = api_ready;
		1552	coroapi.is_ready = api_is_ready;
1068	coroapi.nready = &coro_nready;	1553	coroapi.nready = &coro_nready;
1069	coroapi.current = coro_current;	1554	coroapi.current = coro_current;
1070		1555
1071	GCoroAPI = &coroapi;	1556	GCoroAPI = &coroapi;
1072	sv_setiv (sv, (IV)&coroapi);	1557	sv_setiv (sv, (IV)&coroapi);
1073	SvREADONLY_on (sv);	1558	SvREADONLY_on (sv);
1074	}	1559	}
1075	}	1560	}
1076		1561
1077	#if !PERL_MICRO
1078
1079	void	1562	void
1080	ready(self)	1563	_set_current (SV *current)
1081	SV * self
1082	PROTOTYPE: $	1564	PROTOTYPE: $
1083	CODE:	1565	CODE:
1084	api_ready (self);	1566	SvREFCNT_dec (SvRV (coro_current));
1085		1567	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1086	#endif
1087		1568
1088	int	1569	int
		1570	prio (Coro::State coro, int newprio = 0)
		1571	ALIAS:
		1572	nice = 1
		1573	CODE:
		1574	{
		1575	RETVAL = coro->prio;
		1576
		1577	if (items > 1)
		1578	{
		1579	if (ix)
		1580	newprio = coro->prio - newprio;
		1581
		1582	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1583	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1584
		1585	coro->prio = newprio;
		1586	}
		1587	}
		1588	OUTPUT:
		1589	RETVAL
		1590
		1591	SV *
		1592	ready (SV *self)
		1593	PROTOTYPE: $
		1594	CODE:
		1595	RETVAL = boolSV (api_ready (self));
		1596	OUTPUT:
		1597	RETVAL
		1598
		1599	int
1089	nready(...)	1600	nready (...)
1090	PROTOTYPE:	1601	PROTOTYPE:
1091	CODE:	1602	CODE:
1092	RETVAL = coro_nready;	1603	RETVAL = coro_nready;
1093	OUTPUT:	1604	OUTPUT:
1094	RETVAL	1605	RETVAL
1095		1606
		1607	# for async_pool speedup
1096	void	1608	void
1097	schedule(...)	1609	_pool_1 (SV *cb)
1098	PROTOTYPE:
1099	CODE:	1610	CODE:
1100	api_schedule ();	1611	{
		1612	int i, len;
		1613	HV *hv = (HV *)SvRV (coro_current);
		1614	AV *defav = GvAV (PL_defgv);
		1615	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1616	AV *invoke_av;
		1617
		1618	if (!invoke)
		1619	croak ("\3terminate\2\n");
		1620
		1621	hv_store (hv, "desc", sizeof ("desc") - 1,
		1622	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1623
		1624	invoke_av = (AV *)SvRV (invoke);
		1625	len = av_len (invoke_av);
		1626
		1627	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1628
		1629	if (len > 0)
		1630	{
		1631	av_fill (defav, len - 1);
		1632	for (i = 0; i < len; ++i)
		1633	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1634	}
		1635
		1636	SvREFCNT_dec (invoke);
		1637	}
1101		1638
1102	void	1639	void
1103	cede(...)	1640	_pool_2 (SV *cb)
1104	PROTOTYPE:
1105	CODE:	1641	CODE:
1106	api_cede ();	1642	{
		1643	struct coro *coro = SvSTATE (coro_current);
1107		1644
1108	# and these are hacks	1645	sv_setsv (cb, &PL_sv_undef);
		1646
		1647	if (coro_rss (coro) > SvIV (sv_pool_rss)
		1648	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1649	croak ("\3terminate\2\n");
		1650
		1651	av_clear (GvAV (PL_defgv));
		1652	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1653	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1654	coro->save = CORO_SAVE_DEF;
		1655	coro->prio = 0;
		1656	av_push (av_async_pool, newSVsv (coro_current));
		1657	}
		1658
		1659
		1660	MODULE = Coro::State PACKAGE = Coro::AIO
		1661
1109	SV *	1662	SV *
1110	_aio_get_state ()	1663	_get_state ()
1111	CODE:	1664	CODE:
1112	{	1665	{
1113	struct {	1666	struct io_state *data;
1114	int errorno;
1115	int laststype;
1116	int laststatval;
1117	Stat_t statcache;
1118	} data;
1119		1667
		1668	RETVAL = newSV (sizeof (struct io_state));
		1669	data = (struct io_state *)SvPVX (RETVAL);
		1670	SvCUR_set (RETVAL, sizeof (struct io_state));
		1671	SvPOK_only (RETVAL);
		1672
1120	data.errorno = errno;	1673	data->errorno = errno;
1121	data.laststype = PL_laststype;	1674	data->laststype = PL_laststype;
1122	data.laststatval = PL_laststatval;	1675	data->laststatval = PL_laststatval;
1123	data.statcache = PL_statcache;	1676	data->statcache = PL_statcache;
1124
1125	RETVAL = newSVpvn ((char *)&data, sizeof data);
1126	}	1677	}
1127	OUTPUT:	1678	OUTPUT:
1128	RETVAL	1679	RETVAL
1129		1680
1130	void	1681	void
1131	_aio_set_state (char *data_)	1682	_set_state (char *data_)
1132	PROTOTYPE: $	1683	PROTOTYPE: $
1133	CODE:	1684	CODE:
1134	{	1685	{
1135	struct {	1686	struct io_state *data = (void *)data_;
1136	int errorno;
1137	int laststype;
1138	int laststatval;
1139	Stat_t statcache;
1140	} *data = (void *)data_;
1141		1687
1142	errno = data->errorno;	1688	errno = data->errorno;
1143	PL_laststype = data->laststype;	1689	PL_laststype = data->laststype;
1144	PL_laststatval = data->laststatval;	1690	PL_laststatval = data->laststatval;
1145	PL_statcache = data->statcache;	1691	PL_statcache = data->statcache;
1146	}	1692	}
		1693

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