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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.81 by root, Fri Nov 3 00:56:03 2006 UTC vs.
Revision 1.167 by root, Thu Sep 27 15:52:31 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <errno.h>	75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
33		79
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	81	# undef CORO_STACKGUARD
36	#endif
37
38	#ifndef STACKGUARD
39	# define STACKGUARD 0
40	#endif
41
42	#ifdef HAVE_MMAP
43	# include <unistd.h>
44	# include <sys/mman.h>
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	82	#endif
52	# include <limits.h>	83
53	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	86	#endif
60	#endif
61		87
62	#define SUB_INIT "Coro::State::initialize"	88	/* prefer perl internal functions over our own? */
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_NOREUSE = 0x02, /* throw this away after tracing */
		148	CC_TRACE = 0x04,
		149	CC_TRACE_SUB = 0x08, /* trace sub calls */
		150	CC_TRACE_LINE = 0x10, /* trace each statement */
		151	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		152	};
		153
		154	/* this is a structure representing a c-level coroutine */
93	typedef struct {	155	typedef struct coro_cctx {
94	int refcnt; /* pointer reference counter */	156	struct coro_cctx *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		157
		158	/* the stack */
		159	void *sptr;
		160	size_t ssize;
		161
		162	/* cpu state */
		163	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		164	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		165	JMPENV *top_env;
98	coro_context cctx;	166	coro_context cctx;
99		167
100	void *sptr;	168	#if CORO_USE_VALGRIND
101	long ssize; /* positive == mmap, otherwise malloc */	169	int valgrind_id;
102	} coro_stack;	170	#endif
		171	unsigned char flags;
		172	} coro_cctx;
103		173
		174	enum {
		175	CF_RUNNING = 0x0001, /* coroutine is running */
		176	CF_READY = 0x0002, /* coroutine is ready */
		177	CF_NEW = 0x0004, /* has never been switched to */
		178	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		179	};
		180
		181	/* this is a structure representing a perl-level coroutine */
104	struct coro {	182	struct coro {
105	/* the optional C context */	183	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	184	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		185
150	/* data associated with this coroutine (initial args) */	186	/* data associated with this coroutine (initial args) */
151	AV *args;	187	AV *args;
		188	int refcnt;
		189	int save; /* CORO_SAVE flags */
		190	int flags; /* CF_ flags */
		191
		192	/* optionally saved, might be zero */
		193	AV *defav; /* @_ */
		194	SV *defsv; /* $_ */
		195	SV *errsv; /* $@ */
		196	GV *deffh; /* default filehandle */
		197	SV *irssv; /* $/ */
		198	SV *irssv_sv; /* real $/ cache */
		199
		200	#define VAR(name,type) type name;
		201	# include "state.h"
		202	#undef VAR
		203
		204	/* coro process data */
		205	int prio;
		206
		207	/* linked list */
		208	struct coro *next, *prev;
		209	HV *hv; /* the perl hash associated with this coro, if any */
152	};	210	};
153		211
154	typedef struct coro *Coro__State;	212	typedef struct coro *Coro__State;
155	typedef struct coro *Coro__State_or_hashref;	213	typedef struct coro *Coro__State_or_hashref;
156		214
		215	/** Coro ********************************************************************/
		216
		217	#define PRIO_MAX 3
		218	#define PRIO_HIGH 1
		219	#define PRIO_NORMAL 0
		220	#define PRIO_LOW -1
		221	#define PRIO_IDLE -3
		222	#define PRIO_MIN -4
		223
		224	/* for Coro.pm */
		225	static SV *coro_current;
		226	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		227	static int coro_nready;
		228	static struct coro *coro_first;
		229
		230	/** lowlevel stuff **********************************************************/
		231
157	static AV *	232	static AV *
158	coro_clone_padlist (pTHX_ CV *cv)	233	coro_clone_padlist (pTHX_ CV *cv)
159	{	234	{
160	AV *padlist = CvPADLIST (cv);	235	AV *padlist = CvPADLIST (cv);
161	AV *newpadlist, *newpad;	236	AV *newpadlist, *newpad;
162		237
163	newpadlist = newAV ();	238	newpadlist = newAV ();
164	AvREAL_off (newpadlist);	239	AvREAL_off (newpadlist);
165	#if PERL_VERSION < 9	240	#if PERL_VERSION_ATLEAST (5,9,0)
		241	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		242	#else
166	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	243	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
167	#else
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169	#endif	244	#endif
170	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	245	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
171	--AvFILLp (padlist);	246	--AvFILLp (padlist);
172		247
173	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	248	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
217		292
218	#define PERL_MAGIC_coro PERL_MAGIC_ext	293	#define PERL_MAGIC_coro PERL_MAGIC_ext
219		294
220	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	295	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221		296
		297	#define CORO_MAGIC(cv) \
		298	SvMAGIC (cv) \
		299	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		300	? SvMAGIC (cv) \
		301	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		302	: 0
		303
222	/* the next two functions merely cache the padlists */	304	/* the next two functions merely cache the padlists */
223	static void	305	static void
224	get_padlist (pTHX_ CV *cv)	306	get_padlist (pTHX_ CV *cv)
225	{	307	{
226	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	308	MAGIC *mg = CORO_MAGIC (cv);
		309	AV *av;
227		310
228	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	311	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
229	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	312	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
230	else	313	else
231	{	314	{
232	#if 0	315	#if CORO_PREFER_PERL_FUNCTIONS
233	/* this should work - but it doesn't :( */	316	/* this is probably cleaner, but also slower? */
234	CV *cp = Perl_cv_clone (aTHX_ cv);	317	CV *cp = Perl_cv_clone (cv);
235	CvPADLIST (cv) = CvPADLIST (cp);	318	CvPADLIST (cv) = CvPADLIST (cp);
236	CvPADLIST (cp) = 0;	319	CvPADLIST (cp) = 0;
237	SvREFCNT_dec (cp);	320	SvREFCNT_dec (cp);
238	#else	321	#else
239	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	322	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
242	}	325	}
243		326
244	static void	327	static void
245	put_padlist (pTHX_ CV *cv)	328	put_padlist (pTHX_ CV *cv)
246	{	329	{
247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	330	MAGIC *mg = CORO_MAGIC (cv);
		331	AV *av;
248		332
249	if (!mg)	333	if (!mg)
250	{	334	{
251	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	335	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
252	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	336	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
253	mg->mg_virtual = &vtbl_coro;	337	mg->mg_virtual = &vtbl_coro;
254	mg->mg_obj = (SV *)newAV ();	338	mg->mg_obj = (SV *)newAV ();
255	}	339	}
256		340
257	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	341	av = (AV *)mg->mg_obj;
		342
		343	if (AvFILLp (av) >= AvMAX (av))
		344	av_extend (av, AvMAX (av) + 1);
		345
		346	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
258	}	347	}
		348
		349	/** load & save, init *******************************************************/
259		350
260	#define SB do {	351	#define SB do {
261	#define SE } while (0)	352	#define SE } while (0)
262		353
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	354	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
267		355
268	static void	356	static void
269	load_state(pTHX_ Coro__State c)	357	load_perl (pTHX_ Coro__State c)
270	{	358	{
271	PL_dowarn = c->dowarn;	359	#define VAR(name,type) PL_ ## name = c->name;
272	PL_in_eval = c->in_eval;	360	# include "state.h"
273		361	#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		362
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	363	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	364	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	365	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		366	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		367
		368	if (c->irssv)
		369	{
		370	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		371	{
		372	SvREFCNT_dec (c->irssv);
		373	c->irssv = 0;
		374	}
		375	else
		376	{
		377	REPLACE_SV (PL_rs, c->irssv);
		378	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		379	sv_setsv (c->irssv_sv, PL_rs);
		380	}
		381	}
309		382
310	{	383	{
311	dSP;	384	dSP;
312	CV *cv;	385	CV *cv;
313		386
314	/* now do the ugly restore mess */	387	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	388	while ((cv = (CV *)POPs))
316	{	389	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	390	put_padlist (aTHX_ cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	391	CvDEPTH (cv) = PTR2IV (POPs);
323	}	392	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	393	}
327		394
328	PUTBACK;	395	PUTBACK;
329	}	396	}
330	}	397	}
331		398
332	static void	399	static void
333	save_state(pTHX_ Coro__State c, int flags)	400	save_perl (pTHX_ Coro__State c)
334	{	401	{
335	{	402	{
336	dSP;	403	dSP;
337	I32 cxix = cxstack_ix;	404	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	405	PERL_CONTEXT *ccstk = cxstack;
…		…
341	/*	408	/*
342	* the worst thing you can imagine happens first - we have to save	409	* the worst thing you can imagine happens first - we have to save
343	* (and reinitialize) all cv's in the whole callchain :(	410	* (and reinitialize) all cv's in the whole callchain :(
344	*/	411	*/
345		412
346	PUSHs (Nullsv);	413	XPUSHs (Nullsv);
347	/* this loop was inspired by pp_caller */	414	/* this loop was inspired by pp_caller */
348	for (;;)	415	for (;;)
349	{	416	{
350	while (cxix >= 0)	417	while (cxix >= 0)
351	{	418	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	419	PERL_CONTEXT *cx = &ccstk[cxix--];
353		420
354	if (CxTYPE(cx) == CXt_SUB)	421	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
355	{	422	{
356	CV *cv = cx->blk_sub.cv;	423	CV *cv = cx->blk_sub.cv;
		424
357	if (CvDEPTH(cv))	425	if (CvDEPTH (cv))
358	{	426	{
359	EXTEND (SP, CvDEPTH(cv)*2);	427	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));	428	PUSHs ((SV *)CvPADLIST (cv));
		429	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	430	PUSHs ((SV *)cv);
370		431
		432	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	433	get_padlist (aTHX_ cv);
372	}	434	}
373	}	435	}
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	}	436	}
383		437
384	if (top_si->si_type == PERLSI_MAIN)	438	if (top_si->si_type == PERLSI_MAIN)
385	break;	439	break;
386		440
387	top_si = top_si->si_prev;	441	top_si = top_si->si_prev;
388	ccstk = top_si->si_cxstack;	442	ccstk = top_si->si_cxstack;
389	cxix = top_si->si_cxix;	443	cxix = top_si->si_cxix;
390	}	444	}
391		445
392	PUTBACK;	446	PUTBACK;
393	}	447	}
394		448
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	449	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	450	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	451	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		452	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		453	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
398		454
399	c->dowarn = PL_dowarn;	455	#define VAR(name,type)c->name = PL_ ## name;
400	c->in_eval = PL_in_eval;	456	# include "state.h"
401		457	#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	}	458	}
434		459
435	/*	460	/*
436	* allocate various perl stacks. This is an exact copy	461	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	462	* of perl.c:init_stacks, except that it uses less memory
438	* on the (sometimes correct) assumption that coroutines do	463	* on the (sometimes correct) assumption that coroutines do
439	* not usually need a lot of stackspace.	464	* not usually need a lot of stackspace.
440	*/	465	*/
		466	#if CORO_PREFER_PERL_FUNCTIONS
		467	# define coro_init_stacks init_stacks
		468	#else
441	static void	469	static void
442	coro_init_stacks (pTHX)	470	coro_init_stacks (pTHX)
443	{	471	{
444	LOCK;	472	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;	473	PL_curstackinfo->si_type = PERLSI_MAIN;
448	PL_curstack = PL_curstackinfo->si_stack;	474	PL_curstack = PL_curstackinfo->si_stack;
449	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	475	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
450		476
451	PL_stack_base = AvARRAY(PL_curstack);	477	PL_stack_base = AvARRAY(PL_curstack);
452	PL_stack_sp = PL_stack_base;	478	PL_stack_sp = PL_stack_base;
453	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	479	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
454		480
455	New(50,PL_tmps_stack,96,SV*);	481	New(50,PL_tmps_stack,64,SV*);
456	PL_tmps_floor = -1;	482	PL_tmps_floor = -1;
457	PL_tmps_ix = -1;	483	PL_tmps_ix = -1;
458	PL_tmps_max = 96;	484	PL_tmps_max = 64;
459		485
460	New(54,PL_markstack,16,I32);	486	New(54,PL_markstack,16,I32);
461	PL_markstack_ptr = PL_markstack;	487	PL_markstack_ptr = PL_markstack;
462	PL_markstack_max = PL_markstack + 16;	488	PL_markstack_max = PL_markstack + 16;
463		489
…		…
467		493
468	New(54,PL_scopestack,16,I32);	494	New(54,PL_scopestack,16,I32);
469	PL_scopestack_ix = 0;	495	PL_scopestack_ix = 0;
470	PL_scopestack_max = 16;	496	PL_scopestack_max = 16;
471		497
472	New(54,PL_savestack,96,ANY);	498	New(54,PL_savestack,64,ANY);
473	PL_savestack_ix = 0;	499	PL_savestack_ix = 0;
474	PL_savestack_max = 96;	500	PL_savestack_max = 64;
475		501
476	#if PERL_VERSION < 9	502	#if !PERL_VERSION_ATLEAST (5,9,0)
477	New(54,PL_retstack,8,OP*);	503	New(54,PL_retstack,4,OP*);
478	PL_retstack_ix = 0;	504	PL_retstack_ix = 0;
479	PL_retstack_max = 8;	505	PL_retstack_max = 4;
480	#endif	506	#endif
481
482	UNLOCK;
483	}	507	}
		508	#endif
484		509
485	/*	510	/*
486	* destroy the stacks, the callchain etc...	511	* destroy the stacks, the callchain etc...
487	*/	512	*/
488	static void	513	static void
489	destroy_stacks(pTHX)	514	coro_destroy_stacks (pTHX)
490	{	515	{
491	if (!IN_DESTRUCT)	516	if (!IN_DESTRUCT)
492	{	517	{
493	/* is this ugly, I ask? */	518	/* restore all saved variables and stuff */
494	LEAVE_SCOPE (0);	519	LEAVE_SCOPE (0);
		520	assert (PL_tmps_floor == -1);
495		521
496	/* sure it is, but more important: is it correct?? :/ */	522	/* free all temporaries */
497	FREETMPS;	523	FREETMPS;
		524	assert (PL_tmps_ix == -1);
498		525
		526	/* unwind all extra stacks */
499	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	527	POPSTACK_TO (PL_mainstack);
		528
		529	/* unwind main stack */
		530	dounwind (-1);
500	}	531	}
501		532
502	while (PL_curstackinfo->si_next)	533	while (PL_curstackinfo->si_next)
503	PL_curstackinfo = PL_curstackinfo->si_next;	534	PL_curstackinfo = PL_curstackinfo->si_next;
504		535
505	while (PL_curstackinfo)	536	while (PL_curstackinfo)
506	{	537	{
507	PERL_SI *p = PL_curstackinfo->si_prev;	538	PERL_SI *p = PL_curstackinfo->si_prev;
508		539
509	{ /*D*//*remove*/
510	dSP;
511	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
512	PUTBACK; /* possibly superfluous */
513	}
514
515	if (!IN_DESTRUCT)	540	if (!IN_DESTRUCT)
516	{
517	dounwind (-1);/*D*//*remove*/
518	SvREFCNT_dec (PL_curstackinfo->si_stack);	541	SvREFCNT_dec (PL_curstackinfo->si_stack);
519	}
520		542
521	Safefree (PL_curstackinfo->si_cxstack);	543	Safefree (PL_curstackinfo->si_cxstack);
522	Safefree (PL_curstackinfo);	544	Safefree (PL_curstackinfo);
523	PL_curstackinfo = p;	545	PL_curstackinfo = p;
524	}	546	}
525		547
526	Safefree (PL_tmps_stack);	548	Safefree (PL_tmps_stack);
527	Safefree (PL_markstack);	549	Safefree (PL_markstack);
528	Safefree (PL_scopestack);	550	Safefree (PL_scopestack);
529	Safefree (PL_savestack);	551	Safefree (PL_savestack);
530	#if PERL_VERSION < 9	552	#if !PERL_VERSION_ATLEAST (5,9,0)
531	Safefree (PL_retstack);	553	Safefree (PL_retstack);
532	#endif	554	#endif
533	}	555	}
534		556
		557	static size_t
		558	coro_rss (struct coro *coro)
		559	{
		560	size_t rss = sizeof (coro);
		561
		562	if (coro->mainstack)
		563	{
		564	if (coro->flags & CF_RUNNING)
		565	{
		566	#define VAR(name,type)coro->name = PL_ ## name;
		567	# include "state.h"
		568	#undef VAR
		569	}
		570
		571	rss += sizeof (coro->curstackinfo);
		572	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		573	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		574	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		575	rss += coro->tmps_max * sizeof (SV *);
		576	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		577	rss += coro->scopestack_max * sizeof (I32);
		578	rss += coro->savestack_max * sizeof (ANY);
		579
		580	#if !PERL_VERSION_ATLEAST (5,9,0)
		581	rss += coro->retstack_max * sizeof (OP *);
		582	#endif
		583	}
		584
		585	return rss;
		586	}
		587
		588	/** coroutine stack handling ************************************************/
		589
535	static void	590	static void
536	allocate_stack (Coro__State ctx, int alloc)	591	setup_coro (pTHX_ struct coro *coro)
537	{
538	coro_stack *stack;
539
540	New (0, stack, 1, coro_stack);
541
542	stack->refcnt = 1;
543	stack->usecnt = 1;
544	stack->gencnt = ctx->gencnt = 0;
545
546	if (alloc)
547	{
548	#if HAVE_MMAP
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	{
553	# if STACKGUARD
554	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
555	# endif
556	}
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	ctx->stack = stack;
568	}
569
570	static void
571	deallocate_stack (Coro__State ctx)
572	{
573	coro_stack *stack = ctx->stack;
574
575	ctx->stack = 0;
576
577	if (stack)
578	{
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
588	Safefree (stack);
589	}
590	else if (ctx->gencnt == stack->gencnt)
591	--stack->usecnt;
592	}
593	}
594
595	static void
596	setup_coro (void *arg)
597	{	592	{
598	/*	593	/*
599	* emulate part of the perl startup here.	594	* emulate part of the perl startup here.
600	*/	595	*/
		596	coro_init_stacks (aTHX);
		597
		598	PL_curcop = &PL_compiling;
		599	PL_in_eval = EVAL_NULL;
		600	PL_comppad = 0;
		601	PL_curpm = 0;
		602	PL_localizing = 0;
		603	PL_dirty = 0;
		604	PL_restartop = 0;
		605
		606	{
		607	dSP;
		608	LOGOP myop;
		609
		610	SvREFCNT_dec (GvAV (PL_defgv));
		611	GvAV (PL_defgv) = coro->args; coro->args = 0;
		612
		613	Zero (&myop, 1, LOGOP);
		614	myop.op_next = Nullop;
		615	myop.op_flags = OPf_WANT_VOID;
		616
		617	PUSHMARK (SP);
		618	XPUSHs (av_shift (GvAV (PL_defgv)));
		619	PUTBACK;
		620	PL_op = (OP *)&myop;
		621	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		622	SPAGAIN;
		623	}
		624
		625	ENTER; /* necessary e.g. for dounwind */
		626	}
		627
		628	static void
		629	free_coro_mortal (pTHX)
		630	{
		631	if (coro_mortal)
		632	{
		633	SvREFCNT_dec (coro_mortal);
		634	coro_mortal = 0;
		635	}
		636	}
		637
		638	static int
		639	runops_coro (pTHX)
		640	{
		641	COP *oldcop = 0;
		642	int oldcxix = -2;
		643
		644	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		645	{
		646	PERL_ASYNC_CHECK ();
		647
		648	if (PL_op->op_type == OP_LEAVESUB)
		649	{
		650	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		651	SV **bot, **top;
		652	AV *av = newAV (); /* return values */
		653	runops_proc_t old_runops = PL_runops;
		654	dSP;
		655	ENTER;
		656	SAVETMPS;
		657	EXTEND (SP, 3);
		658	PL_runops = RUNOPS_DEFAULT;
		659
		660	GV *gv = CvGV (cx->blk_sub.cv);
		661	SV *fullname = sv_2mortal (newSV (0));
		662	if (isGV (gv))
		663	gv_efullname3 (fullname, gv, 0);
		664
		665	bot = PL_stack_base + cx->blk_oldsp + 1;
		666	top = cx->blk_gimme == G_ARRAY ? SP + 1
		667	: cx->blk_gimme == G_SCALAR ? bot + 1
		668	: bot;
		669
		670	while (bot < top)
		671	av_push (av, SvREFCNT_inc (*bot++));
		672
		673	PUSHMARK (SP);
		674	PUSHs (&PL_sv_no);
		675	PUSHs (fullname);
		676	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		677	PUTBACK;
		678	call_pv ("Coro::_do_trace_sub", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		679	SPAGAIN;
		680
		681	FREETMPS;
		682	LEAVE;
		683	PL_runops = old_runops;
		684	}
		685
		686	if (oldcop != PL_curcop)
		687	{
		688	oldcop = PL_curcop;
		689
		690	if (PL_curcop != &PL_compiling)
		691	{
		692	runops_proc_t old_runops = PL_runops;
		693	dSP;
		694	ENTER;
		695	SAVETMPS;
		696	EXTEND (SP, 3);
		697	PL_runops = RUNOPS_DEFAULT;
		698
		699	if (oldcxix != cxstack_ix)
		700	{
		701	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		702
		703	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		704	{
		705	GV *gv = CvGV (cx->blk_sub.cv);
		706	SV *fullname = sv_2mortal (newSV (0));
		707	if (isGV (gv))
		708	gv_efullname3 (fullname, gv, 0);
		709
		710	PUSHMARK (SP);
		711	PUSHs (&PL_sv_yes);
		712	PUSHs (fullname);
		713	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		714	PUTBACK;
		715	call_pv ("Coro::_do_trace_sub", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		716	SPAGAIN;
		717	}
		718
		719	oldcxix = cxstack_ix;
		720	}
		721
		722	if (0) {
		723	PUSHMARK (SP);
		724	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		725	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		726	PUTBACK;
		727	call_pv ("Coro::_do_trace_line", G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		728	SPAGAIN;
		729	}
		730
		731	FREETMPS;
		732	LEAVE;
		733	PL_runops = old_runops;
		734	}
		735	}
		736	}
		737
		738	TAINT_NOT;
		739	return 0;
		740	}
		741
		742	/* inject a fake call to Coro::State::_cctx_init into the execution */
		743	/* _cctx_init should be careful, as it could be called at almost any time */
		744	/* during execution of a perl program */
		745	static void NOINLINE
		746	prepare_cctx (pTHX_ coro_cctx *cctx)
		747	{
		748	dSP;
		749	LOGOP myop;
		750
		751	PL_top_env = &PL_start_env;
		752
		753	if (cctx->flags & CC_TRACE)
		754	PL_runops = runops_coro;
		755
		756	Zero (&myop, 1, LOGOP);
		757	myop.op_next = PL_op;
		758	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		759
		760	PUSHMARK (SP);
		761	EXTEND (SP, 2);
		762	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		763	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		764	PUTBACK;
		765	PL_op = (OP *)&myop;
		766	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		767	SPAGAIN;
		768	}
		769
		770	/*
		771	* this is a _very_ stripped down perl interpreter ;)
		772	*/
		773	static void
		774	coro_run (void *arg)
		775	{
601	dTHX;	776	dTHX;
602	dSP;
603	Coro__State ctx = (Coro__State)arg;
604	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
605		777
606	coro_init_stacks (aTHX);	778	/* coro_run is the alternative tail of transfer(), so unlock here. */
607	/*PL_curcop = 0;*/	779	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		780
612	SPAGAIN;	781	/* we now skip the entersub that lead to transfer() */
		782	PL_op = PL_op->op_next;
613		783
614	if (ctx->stack)	784	/* inject a fake subroutine call to cctx_init */
615	{	785	prepare_cctx (aTHX_ (coro_cctx *)arg);
616	ctx->cursp = 0;
617		786
618	PUSHMARK(SP);	787	/* somebody or something will hit me for both perl_run and PL_restartop */
619	PUTBACK;	788	PL_restartop = PL_op;
620	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	789	perl_run (PL_curinterp);
621		790
622	if (SvTRUE (ERRSV))	791	/*
623	croak (NULL);	792	* If perl-run returns we assume exit() was being called or the coro
624	else	793	* fell off the end, which seems to be the only valid (non-bug)
625	croak ("FATAL: CCTXT coroutine returned!");	794	* reason for perl_run to return. We try to exit by jumping to the
		795	* bootstrap-time "top" top_env, as we cannot restore the "main"
		796	* coroutine as Coro has no such concept
		797	*/
		798	PL_top_env = main_top_env;
		799	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		800	}
		801
		802	static coro_cctx *
		803	cctx_new ()
		804	{
		805	coro_cctx *cctx;
		806	void *stack_start;
		807	size_t stack_size;
		808
		809	++cctx_count;
		810
		811	Newz (0, cctx, 1, coro_cctx);
		812
		813	#if HAVE_MMAP
		814
		815	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		816	/* mmap supposedly does allocate-on-write for us */
		817	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		818
		819	if (cctx->sptr != (void *)-1)
		820	{
		821	# if CORO_STACKGUARD
		822	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		823	# endif
		824	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		825	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		826	cctx->flags |= CC_MAPPED;
626	}	827	}
627	else	828	else
628	{	829	#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	}	830	{
		831	cctx->ssize = coro_stacksize * (long)sizeof (long);
		832	New (0, cctx->sptr, coro_stacksize, long);
		833
		834	if (!cctx->sptr)
		835	{
		836	perror ("FATAL: unable to allocate stack for coroutine");
		837	_exit (EXIT_FAILURE);
		838	}
		839
		840	stack_start = cctx->sptr;
		841	stack_size = cctx->ssize;
		842	}
		843
		844	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		845	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		846
		847	return cctx;
652	}	848	}
653		849
654	static void	850	static void
655	continue_coro (void *arg)	851	cctx_destroy (coro_cctx *cctx)
656	{	852	{
657	/*	853	if (!cctx)
658	* this is a _very_ stripped down perl interpreter ;)	854	return;
659	*/
660	dTHX;
661	Coro__State ctx = (Coro__State)arg;
662		855
663	PL_top_env = &PL_start_env;	856	--cctx_count;
664		857
665	ctx->cursp = 0;	858	#if CORO_USE_VALGRIND
666	PL_op = PL_op->op_next;	859	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
667	CALLRUNOPS(aTHX);	860	#endif
668		861
669	abort ();	862	#if HAVE_MMAP
		863	if (cctx->flags & CC_MAPPED)
		864	munmap (cctx->sptr, cctx->ssize);
		865	else
		866	#endif
		867	Safefree (cctx->sptr);
		868
		869	Safefree (cctx);
		870	}
		871
		872	static coro_cctx *
		873	cctx_get (pTHX)
		874	{
		875	while (cctx_first)
		876	{
		877	coro_cctx *cctx = cctx_first;
		878	cctx_first = cctx->next;
		879	--cctx_idle;
		880
		881	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		882	return cctx;
		883
		884	cctx_destroy (cctx);
		885	}
		886
		887	return cctx_new ();
670	}	888	}
671		889
672	static void	890	static void
		891	cctx_put (coro_cctx *cctx)
		892	{
		893	/* free another cctx if overlimit */
		894	if (cctx_idle >= MAX_IDLE_CCTX)
		895	{
		896	coro_cctx *first = cctx_first;
		897	cctx_first = first->next;
		898	--cctx_idle;
		899
		900	cctx_destroy (first);
		901	}
		902
		903	++cctx_idle;
		904	cctx->next = cctx_first;
		905	cctx_first = cctx;
		906	}
		907
		908	/** coroutine switching *****************************************************/
		909
		910	/* never call directly, always through the coro_state_transfer global variable */
		911	static void NOINLINE
673	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	912	transfer (pTHX_ struct coro *prev, struct coro *next)
674	{	913	{
675	dSTACKLEVEL;	914	dSTACKLEVEL;
676		915
		916	/* sometimes transfer is only called to set idle_sp */
		917	if (!next)
		918	{
		919	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		920	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		921	}
677	if (prev != next)	922	else if (prev != next)
678	{	923	{
679	/* has this coro been created yet? */	924	coro_cctx *prev__cctx;
680	if (next->mainstack)	925
		926	if (prev->flags & CF_NEW)
681	{	927	{
682	LOCK;	928	/* create a new empty context */
683	SAVE (prev, flags);	929	Newz (0, prev->cctx, 1, coro_cctx);
684	LOAD (next);	930	prev->flags &= ~CF_NEW;
685	UNLOCK;	931	prev->flags |= CF_RUNNING;
686
687	/* mark this state as in-use */
688	next->mainstack = 0;
689	next->tmps_ix = -2;
690
691	/* stacklevel changed? if yes, grab the stack for us! */
692	if (flags & TRANSFER_SAVE_CCTXT)
693	{
694	if (!prev->stack)
695	allocate_stack (prev, 0);
696	else if (prev->cursp != stacklevel
697	&& prev->stack->usecnt > 1)
698	{
699	prev->gencnt = ++prev->stack->gencnt;
700	prev->stack->usecnt = 1;
701	}
702
703	/* has our stack been invalidated? */
704	if (next->stack && next->stack->gencnt != next->gencnt)
705	{
706	deallocate_stack (next);
707	allocate_stack (next, 1);
708	coro_create (&(next->stack->cctx),
709	continue_coro, (void *)next,
710	next->stack->sptr, labs (next->stack->ssize));
711	}
712
713	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
714	prev->cursp = stacklevel;
715	/* don't add any code here */
716	}
717	else
718	next->cursp = stacklevel;
719	}	932	}
720	else if (next->tmps_ix == -2)	933
721	croak ("tried to transfer to running coroutine");	934	/*TODO: must not croak here */
		935	if (!prev->flags & CF_RUNNING)
		936	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		937
		938	if (next->flags & CF_RUNNING)
		939	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		940
		941	if (next->flags & CF_DESTROYED)
		942	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		943
		944	prev->flags &= ~CF_RUNNING;
		945	next->flags |= CF_RUNNING;
		946
		947	LOCK;
		948
		949	if (next->flags & CF_NEW)
		950	{
		951	/* need to start coroutine */
		952	next->flags &= ~CF_NEW;
		953	/* first get rid of the old state */
		954	save_perl (aTHX_ prev);
		955	/* setup coroutine call */
		956	setup_coro (aTHX_ next);
		957	}
722	else	958	else
723	{	959	{
724	LOCK;	960	/* coroutine already started */
725	SAVE (prev, -1); /* first get rid of the old state */	961	save_perl (aTHX_ prev);
726	UNLOCK;	962	load_perl (aTHX_ next);
727
728	/* create the coroutine for the first time */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733
734	/* the new coroutine starts with start_env again */
735	PL_top_env = &PL_start_env;
736
737	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
738	{
739	setup_coro (next);
740	next->cursp = stacklevel;
741
742	prev->stack->refcnt++;
743	prev->stack->usecnt++;
744	next->stack = prev->stack;
745	next->gencnt = prev->gencnt;
746	}
747	else
748	{
749	assert (!next->stack);
750	allocate_stack (next, 1);
751	coro_create (&(next->stack->cctx),
752	setup_coro, (void *)next,
753	next->stack->sptr, labs (next->stack->ssize));
754	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755	prev->cursp = stacklevel;
756	/* don't add any code here */
757	}
758	}
759	else
760	{
761	setup_coro (next);
762	next->cursp = stacklevel;
763	}
764	}	963	}
765	}
766		964
767	LOCK;	965	prev__cctx = prev->cctx;
768	if (coro_mortal)	966
769	{	967	/* possibly "free" the cctx */
770	SvREFCNT_dec (coro_mortal);	968	if (prev__cctx->idle_sp == STACKLEVEL)
771	coro_mortal = 0;	969	{
772	}	970	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		971	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		972
		973	prev->cctx = 0;
		974
		975	cctx_put (prev__cctx);
		976	}
		977
		978	if (!next->cctx)
		979	next->cctx = cctx_get (aTHX);
		980
		981	if (prev__cctx != next->cctx)
		982	{
		983	prev__cctx->top_env = PL_top_env;
		984	PL_top_env = next->cctx->top_env;
		985	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		986	}
		987
		988	free_coro_mortal (aTHX);
773	UNLOCK;	989	UNLOCK;
		990	}
774	}	991	}
775		992
776	#define SV_CORO(sv,func) \	993	struct transfer_args
777	do { \	994	{
778	if (SvROK (sv)) \	995	struct coro *prev, *next;
779	sv = SvRV (sv); \	996	};
780	\
781	if (SvTYPE (sv) == SVt_PVHV) \
782	{ \
783	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
784	\
785	if (!he) \
786	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787	\
788	(sv) = SvRV (HeVAL(he)); \
789	} \
790	\
791	/* must also be changed inside Coro::Cont::yield */ \
792	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
793	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794	\
795	} while(0)
796		997
797	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	998	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		999
		1000	/** high level stuff ********************************************************/
		1001
		1002	static int
		1003	coro_state_destroy (pTHX_ struct coro *coro)
		1004	{
		1005	if (coro->flags & CF_DESTROYED)
		1006	return 0;
		1007
		1008	coro->flags |= CF_DESTROYED;
		1009
		1010	if (coro->flags & CF_READY)
		1011	{
		1012	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1013	/* alternative: look through all ready queues and remove the coro */
		1014	LOCK;
		1015	--coro_nready;
		1016	UNLOCK;
		1017	}
		1018	else
		1019	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		1020
		1021	if (coro->mainstack && coro->mainstack != main_mainstack)
		1022	{
		1023	struct coro temp;
		1024
		1025	assert (!(coro->flags & CF_RUNNING));
		1026
		1027	Zero (&temp, 1, struct coro);
		1028	temp.save = CORO_SAVE_ALL;
		1029
		1030	if (coro->flags & CF_RUNNING)
		1031	croak ("FATAL: tried to destroy currently running coroutine");
		1032
		1033	save_perl (aTHX_ &temp);
		1034	load_perl (aTHX_ coro);
		1035
		1036	coro_destroy_stacks (aTHX);
		1037
		1038	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1039
		1040	coro->mainstack = 0;
		1041	}
		1042
		1043	cctx_destroy (coro->cctx);
		1044	SvREFCNT_dec (coro->args);
		1045
		1046	if (coro->next) coro->next->prev = coro->prev;
		1047	if (coro->prev) coro->prev->next = coro->next;
		1048	if (coro == coro_first) coro_first = coro->next;
		1049
		1050	return 1;
		1051	}
		1052
		1053	static int
		1054	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1055	{
		1056	struct coro *coro = (struct coro *)mg->mg_ptr;
		1057	mg->mg_ptr = 0;
		1058
		1059	coro->hv = 0;
		1060
		1061	if (--coro->refcnt < 0)
		1062	{
		1063	coro_state_destroy (aTHX_ coro);
		1064	Safefree (coro);
		1065	}
		1066
		1067	return 0;
		1068	}
		1069
		1070	static int
		1071	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1072	{
		1073	struct coro *coro = (struct coro *)mg->mg_ptr;
		1074
		1075	++coro->refcnt;
		1076
		1077	return 0;
		1078	}
		1079
		1080	static MGVTBL coro_state_vtbl = {
		1081	0, 0, 0, 0,
		1082	coro_state_free,
		1083	0,
		1084	#ifdef MGf_DUP
		1085	coro_state_dup,
		1086	#else
		1087	# define MGf_DUP 0
		1088	#endif
		1089	};
		1090
		1091	static struct coro *
		1092	SvSTATE_ (pTHX_ SV *coro)
		1093	{
		1094	HV *stash;
		1095	MAGIC *mg;
		1096
		1097	if (SvROK (coro))
		1098	coro = SvRV (coro);
		1099
		1100	stash = SvSTASH (coro);
		1101	if (stash != coro_stash && stash != coro_state_stash)
		1102	{
		1103	/* very slow, but rare, check */
		1104	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		1105	croak ("Coro::State object required");
		1106	}
		1107
		1108	mg = CORO_MAGIC (coro);
		1109	return (struct coro *)mg->mg_ptr;
		1110	}
		1111
		1112	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
798		1113
799	static void	1114	static void
		1115	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1116	{
		1117	ta->prev = SvSTATE (prev_sv);
		1118	ta->next = SvSTATE (next_sv);
		1119	}
		1120
		1121	static void
800	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1122	api_transfer (SV *prev_sv, SV *next_sv)
801	{	1123	{
802	SV_CORO (prev, "Coro::transfer");	1124	dTHX;
803	SV_CORO (next, "Coro::transfer");	1125	struct transfer_args ta;
804		1126
805	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1127	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1128	TRANSFER (ta);
		1129	}
		1130
		1131	static int
		1132	api_save (SV *coro_sv, int new_save)
		1133	{
		1134	dTHX;
		1135	struct coro *coro = SvSTATE (coro_sv);
		1136	int old_save = coro->save;
		1137
		1138	if (new_save >= 0)
		1139	coro->save = new_save;
		1140
		1141	return old_save;
806	}	1142	}
807		1143
808	/** Coro ********************************************************************/	1144	/** Coro ********************************************************************/
809		1145
810	#define PRIO_MAX 3
811	#define PRIO_HIGH 1
812	#define PRIO_NORMAL 0
813	#define PRIO_LOW -1
814	#define PRIO_IDLE -3
815	#define PRIO_MIN -4
816
817	/* for Coro.pm */
818	static GV *coro_current, *coro_idle;
819	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
820	static int coro_nready;
821
822	static void	1146	static void
823	coro_enq (pTHX_ SV *sv)	1147	coro_enq (pTHX_ SV *coro_sv)
824	{	1148	{
825	SV **xprio;
826	int prio;
827
828	if (SvTYPE (sv) != SVt_PVHV)
829	croak ("Coro::ready tried to enqueue something that is not a coroutine");
830
831	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
832	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
833
834	prio = prio > PRIO_MAX ? PRIO_MAX
835	: prio < PRIO_MIN ? PRIO_MIN
836	: prio;
837
838	av_push (coro_ready [prio - PRIO_MIN], sv);	1149	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
839	coro_nready++;
840	}	1150	}
841		1151
842	static SV *	1152	static SV *
843	coro_deq (pTHX_ int min_prio)	1153	coro_deq (pTHX_ int min_prio)
844	{	1154	{
…		…
847	min_prio -= PRIO_MIN;	1157	min_prio -= PRIO_MIN;
848	if (min_prio < 0)	1158	if (min_prio < 0)
849	min_prio = 0;	1159	min_prio = 0;
850		1160
851	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1161	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852	if (av_len (coro_ready[prio]) >= 0)	1162	if (AvFILLp (coro_ready [prio]) >= 0)
853	{
854	coro_nready--;
855	return av_shift (coro_ready[prio]);	1163	return av_shift (coro_ready [prio]);
856	}
857		1164
858	return 0;	1165	return 0;
859	}	1166	}
860		1167
		1168	static int
		1169	api_ready (SV *coro_sv)
		1170	{
		1171	dTHX;
		1172	struct coro *coro;
		1173
		1174	if (SvROK (coro_sv))
		1175	coro_sv = SvRV (coro_sv);
		1176
		1177	coro = SvSTATE (coro_sv);
		1178
		1179	if (coro->flags & CF_READY)
		1180	return 0;
		1181
		1182	coro->flags |= CF_READY;
		1183
		1184	LOCK;
		1185	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1186	++coro_nready;
		1187	UNLOCK;
		1188
		1189	return 1;
		1190	}
		1191
		1192	static int
		1193	api_is_ready (SV *coro_sv)
		1194	{
		1195	dTHX;
		1196	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1197	}
		1198
861	static void	1199	static void
862	api_ready (SV *coro)	1200	prepare_schedule (pTHX_ struct transfer_args *ta)
863	{	1201	{
864	dTHX;	1202	SV *prev_sv, *next_sv;
865		1203
866	if (SvROK (coro))	1204	for (;;)
867	coro = SvRV (coro);	1205	{
		1206	LOCK;
		1207	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1208
		1209	/* nothing to schedule: call the idle handler */
		1210	if (!next_sv)
		1211	{
		1212	dSP;
		1213	UNLOCK;
		1214
		1215	ENTER;
		1216	SAVETMPS;
		1217
		1218	PUSHMARK (SP);
		1219	PUTBACK;
		1220	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1221
		1222	FREETMPS;
		1223	LEAVE;
		1224	continue;
		1225	}
		1226
		1227	ta->next = SvSTATE (next_sv);
		1228
		1229	/* cannot transfer to destroyed coros, skip and look for next */
		1230	if (ta->next->flags & CF_DESTROYED)
		1231	{
		1232	UNLOCK;
		1233	SvREFCNT_dec (next_sv);
		1234	/* coro_nready is already taken care of by destroy */
		1235	continue;
		1236	}
		1237
		1238	--coro_nready;
		1239	UNLOCK;
		1240	break;
		1241	}
		1242
		1243	/* free this only after the transfer */
		1244	prev_sv = SvRV (coro_current);
		1245	SvRV_set (coro_current, next_sv);
		1246	ta->prev = SvSTATE (prev_sv);
		1247
		1248	assert (ta->next->flags & CF_READY);
		1249	ta->next->flags &= ~CF_READY;
868		1250
869	LOCK;	1251	LOCK;
870	coro_enq (aTHX_ SvREFCNT_inc (coro));	1252	free_coro_mortal (aTHX);
		1253	coro_mortal = prev_sv;
871	UNLOCK;	1254	UNLOCK;
		1255	}
		1256
		1257	static void
		1258	prepare_cede (pTHX_ struct transfer_args *ta)
		1259	{
		1260	api_ready (coro_current);
		1261	prepare_schedule (aTHX_ ta);
		1262	}
		1263
		1264	static int
		1265	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1266	{
		1267	if (coro_nready)
		1268	{
		1269	SV *prev = SvRV (coro_current);
		1270	prepare_schedule (aTHX_ ta);
		1271	api_ready (prev);
		1272	return 1;
		1273	}
		1274	else
		1275	return 0;
872	}	1276	}
873		1277
874	static void	1278	static void
875	api_schedule (void)	1279	api_schedule (void)
876	{	1280	{
877	dTHX;	1281	dTHX;
		1282	struct transfer_args ta;
878		1283
879	SV *prev, *next;	1284	prepare_schedule (aTHX_ &ta);
880		1285	TRANSFER (ta);
881	LOCK;
882
883	prev = SvRV (GvSV (coro_current));
884	next = coro_deq (aTHX_ PRIO_MIN);
885
886	if (!next)
887	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
888
889	/* free this only after the transfer */
890	coro_mortal = prev;
891	SV_CORO (prev, "Coro::schedule");
892
893	SvRV (GvSV (coro_current)) = next;
894
895	SV_CORO (next, "Coro::schedule");
896
897	UNLOCK;
898
899	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
900	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
901	}	1286	}
902		1287
903	static void	1288	static int
904	api_cede (void)	1289	api_cede (void)
905	{	1290	{
906	dTHX;	1291	dTHX;
		1292	struct transfer_args ta;
907		1293
908	LOCK;	1294	prepare_cede (aTHX_ &ta);
909	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
910	UNLOCK;
911		1295
912	api_schedule ();	1296	if (ta.prev != ta.next)
		1297	{
		1298	TRANSFER (ta);
		1299	return 1;
		1300	}
		1301	else
		1302	return 0;
		1303	}
		1304
		1305	static int
		1306	api_cede_notself (void)
		1307	{
		1308	dTHX;
		1309	struct transfer_args ta;
		1310
		1311	if (prepare_cede_notself (aTHX_ &ta))
		1312	{
		1313	TRANSFER (ta);
		1314	return 1;
		1315	}
		1316	else
		1317	return 0;
913	}	1318	}
914		1319
915	MODULE = Coro::State PACKAGE = Coro::State	1320	MODULE = Coro::State PACKAGE = Coro::State
916		1321
917	PROTOTYPES: ENABLE	1322	PROTOTYPES: DISABLE
918		1323
919	BOOT:	1324	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1325	{
921	#ifdef USE_ITHREADS	1326	#ifdef USE_ITHREADS
922	MUTEX_INIT (&coro_mutex);	1327	MUTEX_INIT (&coro_mutex);
923	#endif	1328	#endif
924	BOOT_PAGESIZE;	1329	BOOT_PAGESIZE;
925		1330
926	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
927	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
928	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1331	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929		1332
		1333	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1334	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
		1335	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1336	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
		1337
930	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1338	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
931	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1339	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
932	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1340	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1341	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1342	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
933	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1343	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1344	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
934		1345
935	main_mainstack = PL_mainstack;	1346	main_mainstack = PL_mainstack;
		1347	main_top_env = PL_top_env;
		1348
		1349	while (main_top_env->je_prev)
		1350	main_top_env = main_top_env->je_prev;
936		1351
937	coroapi.ver = CORO_API_VERSION;	1352	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1353	coroapi.transfer = api_transfer;
939	}
940		1354
941	Coro::State	1355	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1356	}
943	SV * args	1357
944	PROTOTYPE: $	1358	SV *
		1359	new (char *klass, ...)
945	CODE:	1360	CODE:
946	Coro__State coro;	1361	{
		1362	struct coro *coro;
		1363	HV *hv;
		1364	int i;
947		1365
948	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
949	croak ("Coro::State::_newprocess expects an arrayref");
950
951	Newz (0, coro, 1, struct coro);	1366	Newz (0, coro, 1, struct coro);
		1367	coro->args = newAV ();
		1368	coro->save = CORO_SAVE_DEF;
		1369	coro->flags = CF_NEW;
952		1370
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1371	if (coro_first) coro_first->prev = coro;
954	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1372	coro->next = coro_first;
955	/*coro->stack = 0;*/	1373	coro_first = coro;
956		1374
957	RETVAL = coro;	1375	coro->hv = hv = newHV ();
		1376	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1377	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1378
		1379	for (i = 1; i < items; i++)
		1380	av_push (coro->args, newSVsv (ST (i)));
		1381	}
958	OUTPUT:	1382	OUTPUT:
959	RETVAL	1383	RETVAL
960		1384
		1385	int
		1386	save (SV *coro, int new_save = -1)
		1387	CODE:
		1388	RETVAL = api_save (coro, new_save);
		1389	OUTPUT:
		1390	RETVAL
		1391
		1392	int
		1393	save_also (SV *coro_sv, int save_also)
		1394	CODE:
		1395	{
		1396	struct coro *coro = SvSTATE (coro_sv);
		1397	RETVAL = coro->save;
		1398	coro->save |= save_also;
		1399	}
		1400	OUTPUT:
		1401	RETVAL
		1402
961	void	1403	void
962	transfer(prev, next, flags)	1404	_set_stacklevel (...)
963	SV *prev	1405	ALIAS:
964	SV *next	1406	Coro::State::transfer = 1
965	int flags	1407	Coro::schedule = 2
966	PROTOTYPE: @	1408	Coro::cede = 3
		1409	Coro::cede_notself = 4
967	CODE:	1410	CODE:
968	PUTBACK;	1411	{
969	SV_CORO (next, "Coro::transfer");	1412	struct transfer_args ta;
970	SV_CORO (prev, "Coro::transfer");	1413
971	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1414	switch (ix)
972	SPAGAIN;	1415	{
		1416	case 0:
		1417	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1418	ta.next = 0;
		1419	break;
		1420
		1421	case 1:
		1422	if (items != 2)
		1423	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1424
		1425	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1426	break;
		1427
		1428	case 2:
		1429	prepare_schedule (aTHX_ &ta);
		1430	break;
		1431
		1432	case 3:
		1433	prepare_cede (aTHX_ &ta);
		1434	break;
		1435
		1436	case 4:
		1437	if (!prepare_cede_notself (aTHX_ &ta))
		1438	XSRETURN_EMPTY;
		1439
		1440	break;
		1441	}
		1442
		1443	BARRIER;
		1444	TRANSFER (ta);
		1445
		1446	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1447	XSRETURN_YES;
		1448	}
		1449
		1450	bool
		1451	_destroy (SV *coro_sv)
		1452	CODE:
		1453	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1454	OUTPUT:
		1455	RETVAL
973		1456
974	void	1457	void
975	DESTROY(coro)
976	Coro::State coro
977	CODE:
978
979	if (coro->mainstack && coro->mainstack != main_mainstack)
980	{
981	struct coro temp;
982
983	PUTBACK;
984	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
985	LOAD (aTHX_ coro);
986	SPAGAIN;
987
988	destroy_stacks (aTHX);
989
990	LOAD ((&temp)); /* this will get rid of defsv etc.. */
991	SPAGAIN;
992
993	coro->mainstack = 0;
994	}
995
996	deallocate_stack (coro);
997	SvREFCNT_dec (coro->args);
998	Safefree (coro);
999
1000	void
1001	_exit(code)	1458	_exit (code)
1002	int code	1459	int code
1003	PROTOTYPE: $	1460	PROTOTYPE: $
1004	CODE:	1461	CODE:
1005	_exit (code);	1462	_exit (code);
1006		1463
1007	MODULE = Coro::State PACKAGE = Coro::Cont	1464	int
		1465	cctx_stacksize (int new_stacksize = 0)
		1466	CODE:
		1467	RETVAL = coro_stacksize;
		1468	if (new_stacksize)
		1469	coro_stacksize = new_stacksize;
		1470	OUTPUT:
		1471	RETVAL
		1472
		1473	int
		1474	cctx_count ()
		1475	CODE:
		1476	RETVAL = cctx_count;
		1477	OUTPUT:
		1478	RETVAL
		1479
		1480	int
		1481	cctx_idle ()
		1482	CODE:
		1483	RETVAL = cctx_idle;
		1484	OUTPUT:
		1485	RETVAL
1008		1486
1009	void	1487	void
1010	yield(...)	1488	list ()
1011	PROTOTYPE: @	1489	PPCODE:
		1490	{
		1491	struct coro *coro;
		1492	for (coro = coro_first; coro; coro = coro->next)
		1493	if (coro->hv)
		1494	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1495	}
		1496
		1497	void
		1498	call (Coro::State coro, SV *coderef)
		1499	ALIAS:
		1500	eval = 1
		1501	CODE:
		1502	{
		1503	if (coro->mainstack)
		1504	{
		1505	struct coro temp;
		1506	Zero (&temp, 1, struct coro);
		1507	temp.save = CORO_SAVE_ALL;
		1508
		1509	if (!(coro->flags & CF_RUNNING))
		1510	{
		1511	save_perl (aTHX_ &temp);
		1512	load_perl (aTHX_ coro);
		1513	}
		1514
		1515	{
		1516	dSP;
		1517	ENTER;
		1518	SAVETMPS;
		1519	PUSHMARK (SP);
		1520	PUTBACK;
		1521	if (ix)
		1522	eval_sv (coderef, 0);
		1523	else
		1524	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1525	SPAGAIN;
		1526	FREETMPS;
		1527	LEAVE;
		1528	PUTBACK;
		1529	}
		1530
		1531	if (!(coro->flags & CF_RUNNING))
		1532	{
		1533	save_perl (aTHX_ coro);
		1534	load_perl (aTHX_ &temp);
		1535	}
		1536	}
		1537	}
		1538
		1539	SV *
		1540	is_ready (Coro::State coro)
		1541	PROTOTYPE: $
		1542	ALIAS:
		1543	is_ready = CF_READY
		1544	is_running = CF_RUNNING
		1545	is_new = CF_NEW
		1546	is_destroyed = CF_DESTROYED
		1547	CODE:
		1548	RETVAL = boolSV (coro->flags & ix);
		1549	OUTPUT:
		1550	RETVAL
		1551
		1552	void
		1553	trace (Coro::State coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1554	CODE:
		1555	if (flags & CC_TRACE)
		1556	{
		1557	if (!coro->cctx)
		1558	coro->cctx = cctx_new ();
		1559	else if (!(coro->cctx->flags & CC_TRACE))
		1560	croak ("cannot enable tracing on coroutine with custom stack");
		1561
		1562	coro->cctx->flags |= flags & (CC_TRACE | CC_TRACE_ALL);
		1563	}
		1564	else
		1565	if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1566	{
		1567	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1568	coro->cctx->flags |= CC_NOREUSE;
		1569	}
		1570
		1571	SV *
		1572	has_stack (Coro::State coro)
		1573	PROTOTYPE: $
		1574	CODE:
		1575	RETVAL = boolSV (!!coro->cctx);
		1576	OUTPUT:
		1577	RETVAL
		1578
		1579	int
		1580	is_traced (Coro::State coro)
		1581	PROTOTYPE: $
		1582	CODE:
		1583	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1584	OUTPUT:
		1585	RETVAL
		1586
		1587	IV
		1588	rss (Coro::State coro)
		1589	PROTOTYPE: $
1012	CODE:	1590	CODE:
1013	SV *yieldstack;	1591	RETVAL = coro_rss (coro);
1014	SV *sv;	1592	OUTPUT:
1015	AV *defav = GvAV (PL_defgv);	1593	RETVAL
1016	struct coro *prev, *next;
1017		1594
1018	yieldstack = *hv_fetch (
1019	(HV *)SvRV (GvSV (coro_current)),
1020	"yieldstack", sizeof ("yieldstack") - 1,
1021	0
1022	);
1023
1024	/* set up @_ -- ugly */
1025	av_clear (defav);
1026	av_fill (defav, items - 1);
1027	while (items--)
1028	av_store (defav, items, SvREFCNT_inc (ST(items)));
1029
1030	sv = av_pop ((AV *)SvRV (yieldstack));
1031	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1032	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1033	SvREFCNT_dec (sv);
1034
1035	transfer (aTHX_ prev, next, 0);
1036		1595
1037	MODULE = Coro::State PACKAGE = Coro	1596	MODULE = Coro::State PACKAGE = Coro
1038		1597
1039	BOOT:	1598	BOOT:
1040	{	1599	{
1041	int i;	1600	int i;
		1601
		1602	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1603	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1604	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1605
		1606	coro_current = get_sv ("Coro::current", FALSE);
		1607	SvREADONLY_on (coro_current);
		1608
1042	HV *stash = gv_stashpv ("Coro", TRUE);	1609	coro_stash = gv_stashpv ("Coro", TRUE);
1043		1610
1044	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1611	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1045	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1612	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1046	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1613	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1047	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1614	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1048	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1615	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1049	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1616	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1050
1051	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1052	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1053		1617
1054	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1618	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1055	coro_ready[i] = newAV ();	1619	coro_ready[i] = newAV ();
1056		1620
1057	{	1621	{
1058	SV *sv = perl_get_sv("Coro::API", 1);	1622	SV *sv = perl_get_sv("Coro::API", 1);
1059		1623
1060	coroapi.schedule = api_schedule;	1624	coroapi.schedule = api_schedule;
		1625	coroapi.save = api_save;
1061	coroapi.cede = api_cede;	1626	coroapi.cede = api_cede;
		1627	coroapi.cede_notself = api_cede_notself;
1062	coroapi.ready = api_ready;	1628	coroapi.ready = api_ready;
		1629	coroapi.is_ready = api_is_ready;
1063	coroapi.nready = &coro_nready;	1630	coroapi.nready = &coro_nready;
1064	coroapi.current = coro_current;	1631	coroapi.current = coro_current;
1065		1632
1066	GCoroAPI = &coroapi;	1633	GCoroAPI = &coroapi;
1067	sv_setiv (sv, (IV)&coroapi);	1634	sv_setiv (sv, (IV)&coroapi);
1068	SvREADONLY_on (sv);	1635	SvREADONLY_on (sv);
1069	}	1636	}
1070	}	1637	}
1071		1638
1072	#if !PERL_MICRO
1073
1074	void	1639	void
1075	ready(self)	1640	_set_current (SV *current)
1076	SV * self
1077	PROTOTYPE: $	1641	PROTOTYPE: $
1078	CODE:	1642	CODE:
1079	api_ready (self);	1643	SvREFCNT_dec (SvRV (coro_current));
1080		1644	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1081	#endif
1082		1645
1083	int	1646	int
		1647	prio (Coro::State coro, int newprio = 0)
		1648	ALIAS:
		1649	nice = 1
		1650	CODE:
		1651	{
		1652	RETVAL = coro->prio;
		1653
		1654	if (items > 1)
		1655	{
		1656	if (ix)
		1657	newprio = coro->prio - newprio;
		1658
		1659	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1660	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1661
		1662	coro->prio = newprio;
		1663	}
		1664	}
		1665	OUTPUT:
		1666	RETVAL
		1667
		1668	SV *
		1669	ready (SV *self)
		1670	PROTOTYPE: $
		1671	CODE:
		1672	RETVAL = boolSV (api_ready (self));
		1673	OUTPUT:
		1674	RETVAL
		1675
		1676	int
1084	nready(...)	1677	nready (...)
1085	PROTOTYPE:	1678	PROTOTYPE:
1086	CODE:	1679	CODE:
1087	RETVAL = coro_nready;	1680	RETVAL = coro_nready;
1088	OUTPUT:	1681	OUTPUT:
1089	RETVAL	1682	RETVAL
1090		1683
		1684	# for async_pool speedup
1091	void	1685	void
1092	schedule(...)	1686	_pool_1 (SV *cb)
1093	PROTOTYPE:
1094	CODE:	1687	CODE:
1095	api_schedule ();	1688	{
		1689	int i, len;
		1690	HV *hv = (HV *)SvRV (coro_current);
		1691	AV *defav = GvAV (PL_defgv);
		1692	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1693	AV *invoke_av;
		1694
		1695	if (!invoke)
		1696	croak ("\3terminate\2\n");
		1697
		1698	hv_store (hv, "desc", sizeof ("desc") - 1,
		1699	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1700
		1701	invoke_av = (AV *)SvRV (invoke);
		1702	len = av_len (invoke_av);
		1703
		1704	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1705
		1706	if (len > 0)
		1707	{
		1708	av_fill (defav, len - 1);
		1709	for (i = 0; i < len; ++i)
		1710	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1711	}
		1712
		1713	SvREFCNT_dec (invoke);
		1714	}
1096		1715
1097	void	1716	void
1098	cede(...)	1717	_pool_2 (SV *cb)
1099	PROTOTYPE:
1100	CODE:	1718	CODE:
1101	api_cede ();	1719	{
		1720	struct coro *coro = SvSTATE (coro_current);
1102		1721
1103	# and these are hacks	1722	sv_setsv (cb, &PL_sv_undef);
		1723
		1724	if (coro_rss (coro) > SvIV (sv_pool_rss)
		1725	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1726	croak ("\3terminate\2\n");
		1727
		1728	av_clear (GvAV (PL_defgv));
		1729	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1730	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1731	coro->save = CORO_SAVE_DEF;
		1732	coro->prio = 0;
		1733	av_push (av_async_pool, newSVsv (coro_current));
		1734	}
		1735
		1736
		1737	MODULE = Coro::State PACKAGE = Coro::AIO
		1738
1104	SV *	1739	SV *
1105	_aio_get_state ()	1740	_get_state ()
1106	CODE:	1741	CODE:
1107	{	1742	{
1108	struct {	1743	struct io_state *data;
1109	int errorno;
1110	int laststype;
1111	int laststatval;
1112	Stat_t statcache;
1113	} data;
1114		1744
		1745	RETVAL = newSV (sizeof (struct io_state));
		1746	data = (struct io_state *)SvPVX (RETVAL);
		1747	SvCUR_set (RETVAL, sizeof (struct io_state));
		1748	SvPOK_only (RETVAL);
		1749
1115	data.errorno = errno;	1750	data->errorno = errno;
1116	data.laststype = PL_laststype;	1751	data->laststype = PL_laststype;
1117	data.laststatval = PL_laststatval;	1752	data->laststatval = PL_laststatval;
1118	data.statcache = PL_statcache;	1753	data->statcache = PL_statcache;
1119
1120	RETVAL = newSVpvn ((char *)&data, sizeof data);
1121	}	1754	}
1122	OUTPUT:	1755	OUTPUT:
1123	RETVAL	1756	RETVAL
1124		1757
1125	void	1758	void
1126	_aio_set_state (char *data_)	1759	_set_state (char *data_)
1127	PROTOTYPE: $	1760	PROTOTYPE: $
1128	CODE:	1761	CODE:
1129	{	1762	{
1130	struct {	1763	struct io_state *data = (void *)data_;
1131	int errorno;
1132	int laststype;
1133	int laststatval;
1134	Stat_t statcache;
1135	} *data = (void *)data_;
1136		1764
1137	errno = data->errorno;	1765	errno = data->errorno;
1138	PL_laststype = data->laststype;	1766	PL_laststype = data->laststype;
1139	PL_laststatval = data->laststatval;	1767	PL_laststatval = data->laststatval;
1140	PL_statcache = data->statcache;	1768	PL_statcache = data->statcache;
1141	}	1769	}
		1770

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