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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.95 by root, Sun Nov 26 17:35:42 2006 UTC vs.
Revision 1.149 by root, Sat Apr 14 15:06:05 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <stdio.h>	75	/* 5.8.7 */
33	#include <errno.h>	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
34		79
35	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
36	# undef STACKGUARD	81	# undef CORO_STACKGUARD
37	#endif
38
39	#ifndef STACKGUARD
40	# define STACKGUARD 0
41	#endif
42
43	#ifdef HAVE_MMAP
44	# include <unistd.h>
45	# include <sys/mman.h>
46	# ifndef MAP_ANONYMOUS
47	# ifdef MAP_ANON
48	# define MAP_ANONYMOUS MAP_ANON
49	# else
50	# undef HAVE_MMAP
51	# endif
52	# endif	82	#endif
53	# include <limits.h>	83
54	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
55	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
56	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
57	static long pagesize;
58	# else
59	# define BOOT_PAGESIZE
60	# endif	86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
61	#endif	91	#endif
62		92
63	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macro should declare a variable stacklevel that contains and approximation
64	* to the current C stack pointer. Its property is that it changes with each call	94	* to the current C stack pointer. Its property is that it changes with each call
65	* and should be unique. */	95	* and should be unique. */
66	#define dSTACKLEVEL int stacklevel	96	#define dSTACKLEVEL int stacklevel
67	#define STACKLEVEL ((void *)&stacklevel)	97	#define STACKLEVEL ((void *)&stacklevel)
68		98
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		100
		101	#if __GNUC__ >= 3
		102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		104	#else
		105	# define attribute(x)
		106	# define BARRIER
		107	#endif
		108
		109	#define NOINLINE attribute ((noinline))
		110
71	#include "CoroAPI.h"	111	#include "CoroAPI.h"
72
73	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
74		112
75	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
77	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
78	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
79	#else	117	#else
80	# define LOCK (void)0	118	# define LOCK (void)0
81	# define UNLOCK (void)0	119	# define UNLOCK (void)0
82	#endif	120	#endif
83		121
		122	/* helper storage struct for Coro::AIO */
		123	struct io_state
		124	{
		125	int errorno;
		126	I32 laststype;
		127	int laststatval;
		128	Stat_t statcache;
		129	};
		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
84	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
85	static AV *main_mainstack; /* used to differentiate between $main and others */	133	static AV *main_mainstack; /* used to differentiate between $main and others */
		134	static JMPENV *main_top_env;
86	static HV *coro_state_stash, *coro_stash;	135	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	136	static SV *coro_mortal; /* will be freed after next transfer */
88		137
		138	static struct coro_cctx *cctx_first;
		139	static int cctx_count, cctx_idle;
		140
89	/* this is a structure representing a c-level coroutine */	141	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	142	typedef struct coro_cctx {
91	struct coro_stack *next;	143	struct coro_cctx *next;
92		144
93	/* the stack */	145	/* the stack */
94	void *sptr;	146	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	147	size_t ssize;
96		148
97	/* cpu state */	149	/* cpu state */
98	void *idle_sp; /* original stacklevel when coroutine was created */	150	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		151	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
99	JMPENV *top_env;	152	JMPENV *top_env;
100	coro_context cctx;	153	coro_context cctx;
101	} coro_stack;	154
		155	#if CORO_USE_VALGRIND
		156	int valgrind_id;
		157	#endif
		158	char inuse, mapped;
		159	} coro_cctx;
		160
		161	enum {
		162	CF_RUNNING = 0x0001, /* coroutine is running */
		163	CF_READY = 0x0002, /* coroutine is ready */
		164	CF_NEW = 0x0004, /* has never been switched to */
		165	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		166	};
102		167
103	/* this is a structure representing a perl-level coroutine */	168	/* this is a structure representing a perl-level coroutine */
104	struct coro {	169	struct coro {
105	/* the c coroutine allocated to this perl coroutine, if any */	170	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	171	coro_cctx *cctx;
107		172
108	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
109	AV *args;	174	AV *args;
110	int refcnt;	175	int refcnt;
		176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
111		178
112	/* optionally saved, might be zero */	179	/* optionally saved, might be zero */
113	AV *defav;	180	AV *defav; /* @_ */
114	SV *defsv;	181	SV *defsv; /* $_ */
115	SV *errsv;	182	SV *errsv; /* $@ */
		183	GV *deffh; /* default filehandle */
		184	SV *irssv; /* $/ */
		185	SV *irssv_sv; /* real $/ cache */
116		186
117	/* saved global state not related to stacks */	187	#define VAR(name,type) type name;
118	U8 dowarn;	188	# include "state.h"
119	I32 in_eval;	189	#undef VAR
120
121	/* the stacks and related info (callchain etc..) */
122	PERL_SI *curstackinfo;
123	AV *curstack;
124	AV *mainstack;
125	SV **stack_sp;
126	OP *op;
127	SV **curpad;
128	AV *comppad;
129	CV *compcv;
130	SV **stack_base;
131	SV **stack_max;
132	SV **tmps_stack;
133	I32 tmps_floor;
134	I32 tmps_ix;
135	I32 tmps_max;
136	I32 *markstack;
137	I32 *markstack_ptr;
138	I32 *markstack_max;
139	I32 *scopestack;
140	I32 scopestack_ix;
141	I32 scopestack_max;
142	ANY *savestack;
143	I32 savestack_ix;
144	I32 savestack_max;
145	OP **retstack;
146	I32 retstack_ix;
147	I32 retstack_max;
148	PMOP *curpm;
149	COP *curcop;
150		190
151	/* coro process data */	191	/* coro process data */
152	int prio;	192	int prio;
153	};	193	};
154		194
155	typedef struct coro *Coro__State;	195	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	196	typedef struct coro *Coro__State_or_hashref;
157		197
		198	/** Coro ********************************************************************/
		199
		200	#define PRIO_MAX 3
		201	#define PRIO_HIGH 1
		202	#define PRIO_NORMAL 0
		203	#define PRIO_LOW -1
		204	#define PRIO_IDLE -3
		205	#define PRIO_MIN -4
		206
		207	/* for Coro.pm */
		208	static SV *coro_current;
		209	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		210	static int coro_nready;
		211
		212	/** lowlevel stuff **********************************************************/
		213
158	static AV *	214	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	215	coro_clone_padlist (pTHX_ CV *cv)
160	{	216	{
161	AV *padlist = CvPADLIST (cv);	217	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	218	AV *newpadlist, *newpad;
163		219
164	newpadlist = newAV ();	220	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	221	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	222	#if PERL_VERSION_ATLEAST (5,9,0)
		223	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		224	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	225	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	226	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	227	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	228	--AvFILLp (padlist);
173		229
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	230	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
218		274
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	275	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		276
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	277	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		278
		279	#define CORO_MAGIC(cv) \
		280	SvMAGIC (cv) \
		281	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		282	? SvMAGIC (cv) \
		283	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		284	: 0
		285
223	/* the next two functions merely cache the padlists */	286	/* the next two functions merely cache the padlists */
224	static void	287	static void
225	get_padlist (pTHX_ CV *cv)	288	get_padlist (pTHX_ CV *cv)
226	{	289	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	290	MAGIC *mg = CORO_MAGIC (cv);
		291	AV *av;
228		292
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	293	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	294	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	295	else
232	{	296	{
233	#if 0	297	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this should work - but it doesn't :( */	298	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	299	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	300	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	301	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	302	SvREFCNT_dec (cp);
239	#else	303	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	304	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	307	}
244		308
245	static void	309	static void
246	put_padlist (pTHX_ CV *cv)	310	put_padlist (pTHX_ CV *cv)
247	{	311	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	312	MAGIC *mg = CORO_MAGIC (cv);
		313	AV *av;
249		314
250	if (!mg)	315	if (!mg)
251	{	316	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	317	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	318	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	319	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	320	mg->mg_obj = (SV *)newAV ();
256	}	321	}
257		322
258	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	323	av = (AV *)mg->mg_obj;
		324
		325	if (AvFILLp (av) >= AvMAX (av))
		326	av_extend (av, AvMAX (av) + 1);
		327
		328	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
259	}	329	}
		330
		331	/** load & save, init *******************************************************/
260		332
261	#define SB do {	333	#define SB do {
262	#define SE } while (0)	334	#define SE } while (0)
263		335
264	#define LOAD(state) load_state(aTHX_ (state));
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
266
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	336	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
268		337
269	static void	338	static void
270	load_state(pTHX_ Coro__State c)	339	load_perl (pTHX_ Coro__State c)
271	{	340	{
272	PL_dowarn = c->dowarn;	341	#define VAR(name,type) PL_ ## name = c->name;
273	PL_in_eval = c->in_eval;	342	# include "state.h"
274		343	#undef VAR
275	PL_curstackinfo = c->curstackinfo;
276	PL_curstack = c->curstack;
277	PL_mainstack = c->mainstack;
278	PL_stack_sp = c->stack_sp;
279	PL_op = c->op;
280	PL_curpad = c->curpad;
281	PL_comppad = c->comppad;
282	PL_compcv = c->compcv;
283	PL_stack_base = c->stack_base;
284	PL_stack_max = c->stack_max;
285	PL_tmps_stack = c->tmps_stack;
286	PL_tmps_floor = c->tmps_floor;
287	PL_tmps_ix = c->tmps_ix;
288	PL_tmps_max = c->tmps_max;
289	PL_markstack = c->markstack;
290	PL_markstack_ptr = c->markstack_ptr;
291	PL_markstack_max = c->markstack_max;
292	PL_scopestack = c->scopestack;
293	PL_scopestack_ix = c->scopestack_ix;
294	PL_scopestack_max = c->scopestack_max;
295	PL_savestack = c->savestack;
296	PL_savestack_ix = c->savestack_ix;
297	PL_savestack_max = c->savestack_max;
298	#if PERL_VERSION < 9
299	PL_retstack = c->retstack;
300	PL_retstack_ix = c->retstack_ix;
301	PL_retstack_max = c->retstack_max;
302	#endif
303	PL_curpm = c->curpm;
304	PL_curcop = c->curcop;
305		344
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	345	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	346	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	347	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		348	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		349
		350	if (c->irssv)
		351	{
		352	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		353	{
		354	SvREFCNT_dec (c->irssv);
		355	c->irssv = 0;
		356	}
		357	else
		358	{
		359	REPLACE_SV (PL_rs, c->irssv);
		360	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		361	sv_setsv (c->irssv_sv, PL_rs);
		362	}
		363	}
309		364
310	{	365	{
311	dSP;	366	dSP;
312	CV *cv;	367	CV *cv;
313		368
314	/* now do the ugly restore mess */	369	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	370	while ((cv = (CV *)POPs))
316	{	371	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	372	put_padlist (aTHX_ cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	373	CvDEPTH (cv) = PTR2IV (POPs);
323	}	374	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	375	}
327		376
328	PUTBACK;	377	PUTBACK;
329	}	378	}
		379	assert (!PL_comppad || AvARRAY (PL_comppad));//D
330	}	380	}
331		381
332	static void	382	static void
333	save_state(pTHX_ Coro__State c, int flags)	383	save_perl (pTHX_ Coro__State c)
334	{	384	{
		385	assert (!PL_comppad || AvARRAY (PL_comppad));//D
335	{	386	{
336	dSP;	387	dSP;
337	I32 cxix = cxstack_ix;	388	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	389	PERL_CONTEXT *ccstk = cxstack;
339	PERL_SI *top_si = PL_curstackinfo;	390	PERL_SI *top_si = PL_curstackinfo;
…		…
341	/*	392	/*
342	* the worst thing you can imagine happens first - we have to save	393	* the worst thing you can imagine happens first - we have to save
343	* (and reinitialize) all cv's in the whole callchain :(	394	* (and reinitialize) all cv's in the whole callchain :(
344	*/	395	*/
345		396
		397	EXTEND (SP, 3 + 1);
346	PUSHs (Nullsv);	398	PUSHs (Nullsv);
347	/* this loop was inspired by pp_caller */	399	/* this loop was inspired by pp_caller */
348	for (;;)	400	for (;;)
349	{	401	{
350	while (cxix >= 0)	402	while (cxix >= 0)
351	{	403	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	404	PERL_CONTEXT *cx = &ccstk[cxix--];
353		405
354	if (CxTYPE(cx) == CXt_SUB)	406	if (CxTYPE (cx) == CXt_SUB)
355	{	407	{
356	CV *cv = cx->blk_sub.cv;	408	CV *cv = cx->blk_sub.cv;
		409
357	if (CvDEPTH(cv))	410	if (CvDEPTH (cv))
358	{	411	{
359	EXTEND (SP, CvDEPTH(cv)*2);	412	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));	413	PUSHs ((SV *)CvPADLIST (cv));
		414	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	415	PUSHs ((SV *)cv);
370		416
		417	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	418	get_padlist (aTHX_ cv);
372	}	419	}
373	}	420	}
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	}	421	}
383		422
384	if (top_si->si_type == PERLSI_MAIN)	423	if (top_si->si_type == PERLSI_MAIN)
385	break;	424	break;
386		425
…		…
390	}	429	}
391		430
392	PUTBACK;	431	PUTBACK;
393	}	432	}
394		433
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	434	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;	435	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	436	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		437	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		438	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
398		439
399	c->dowarn = PL_dowarn;	440	#define VAR(name,type)c->name = PL_ ## name;
400	c->in_eval = PL_in_eval;	441	# include "state.h"
401		442	#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	}	443	}
433		444
434	/*	445	/*
435	* allocate various perl stacks. This is an exact copy	446	* allocate various perl stacks. This is an exact copy
436	* of perl.c:init_stacks, except that it uses less memory	447	* of perl.c:init_stacks, except that it uses less memory
437	* on the (sometimes correct) assumption that coroutines do	448	* on the (sometimes correct) assumption that coroutines do
438	* not usually need a lot of stackspace.	449	* not usually need a lot of stackspace.
439	*/	450	*/
		451	#if CORO_PREFER_PERL_FUNCTIONS
		452	# define coro_init_stacks init_stacks
		453	#else
440	static void	454	static void
441	coro_init_stacks (pTHX)	455	coro_init_stacks (pTHX)
442	{	456	{
443	LOCK;
444
445	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	457	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
446	PL_curstackinfo->si_type = PERLSI_MAIN;	458	PL_curstackinfo->si_type = PERLSI_MAIN;
447	PL_curstack = PL_curstackinfo->si_stack;	459	PL_curstack = PL_curstackinfo->si_stack;
448	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	460	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449		461
450	PL_stack_base = AvARRAY(PL_curstack);	462	PL_stack_base = AvARRAY(PL_curstack);
451	PL_stack_sp = PL_stack_base;	463	PL_stack_sp = PL_stack_base;
452	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	464	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453		465
454	New(50,PL_tmps_stack,96,SV*);	466	New(50,PL_tmps_stack,128,SV*);
455	PL_tmps_floor = -1;	467	PL_tmps_floor = -1;
456	PL_tmps_ix = -1;	468	PL_tmps_ix = -1;
457	PL_tmps_max = 96;	469	PL_tmps_max = 128;
458		470
459	New(54,PL_markstack,16,I32);	471	New(54,PL_markstack,32,I32);
460	PL_markstack_ptr = PL_markstack;	472	PL_markstack_ptr = PL_markstack;
461	PL_markstack_max = PL_markstack + 16;	473	PL_markstack_max = PL_markstack + 32;
462		474
463	#ifdef SET_MARK_OFFSET	475	#ifdef SET_MARK_OFFSET
464	SET_MARK_OFFSET;	476	SET_MARK_OFFSET;
465	#endif	477	#endif
466		478
467	New(54,PL_scopestack,16,I32);	479	New(54,PL_scopestack,32,I32);
468	PL_scopestack_ix = 0;	480	PL_scopestack_ix = 0;
469	PL_scopestack_max = 16;	481	PL_scopestack_max = 32;
470		482
471	New(54,PL_savestack,96,ANY);	483	New(54,PL_savestack,64,ANY);
472	PL_savestack_ix = 0;	484	PL_savestack_ix = 0;
473	PL_savestack_max = 96;	485	PL_savestack_max = 64;
474		486
475	#if PERL_VERSION < 9	487	#if !PERL_VERSION_ATLEAST (5,9,0)
476	New(54,PL_retstack,8,OP*);	488	New(54,PL_retstack,16,OP*);
477	PL_retstack_ix = 0;	489	PL_retstack_ix = 0;
478	PL_retstack_max = 8;	490	PL_retstack_max = 16;
479	#endif	491	#endif
480
481	UNLOCK;
482	}	492	}
		493	#endif
483		494
484	/*	495	/*
485	* destroy the stacks, the callchain etc...	496	* destroy the stacks, the callchain etc...
486	*/	497	*/
487	static void	498	static void
488	destroy_stacks(pTHX)	499	coro_destroy_stacks (pTHX)
489	{	500	{
490	if (!IN_DESTRUCT)	501	if (!IN_DESTRUCT)
491	{	502	{
492	/* is this ugly, I ask? */	503	/* restore all saved variables and stuff */
493	LEAVE_SCOPE (0);	504	LEAVE_SCOPE (0);
		505	assert (PL_tmps_floor == -1);
494		506
495	/* sure it is, but more important: is it correct?? :/ */	507	/* free all temporaries */
496	FREETMPS;	508	FREETMPS;
		509	assert (PL_tmps_ix == -1);
497		510
		511	/* unwind all extra stacks */
498	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	512	POPSTACK_TO (PL_mainstack);
		513
		514	/* unwind main stack */
		515	dounwind (-1);
499	}	516	}
500		517
501	while (PL_curstackinfo->si_next)	518	while (PL_curstackinfo->si_next)
502	PL_curstackinfo = PL_curstackinfo->si_next;	519	PL_curstackinfo = PL_curstackinfo->si_next;
503		520
504	while (PL_curstackinfo)	521	while (PL_curstackinfo)
505	{	522	{
506	PERL_SI *p = PL_curstackinfo->si_prev;	523	PERL_SI *p = PL_curstackinfo->si_prev;
507		524
508	{ /*D*//*remove*/
509	dSP;
510	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511	PUTBACK; /* possibly superfluous */
512	}
513
514	if (!IN_DESTRUCT)	525	if (!IN_DESTRUCT)
515	{
516	dounwind (-1);/*D*//*remove*/
517	SvREFCNT_dec (PL_curstackinfo->si_stack);	526	SvREFCNT_dec (PL_curstackinfo->si_stack);
518	}
519		527
520	Safefree (PL_curstackinfo->si_cxstack);	528	Safefree (PL_curstackinfo->si_cxstack);
521	Safefree (PL_curstackinfo);	529	Safefree (PL_curstackinfo);
522	PL_curstackinfo = p;	530	PL_curstackinfo = p;
523	}	531	}
524		532
525	Safefree (PL_tmps_stack);	533	Safefree (PL_tmps_stack);
526	Safefree (PL_markstack);	534	Safefree (PL_markstack);
527	Safefree (PL_scopestack);	535	Safefree (PL_scopestack);
528	Safefree (PL_savestack);	536	Safefree (PL_savestack);
529	#if PERL_VERSION < 9	537	#if !PERL_VERSION_ATLEAST (5,9,0)
530	Safefree (PL_retstack);	538	Safefree (PL_retstack);
531	#endif	539	#endif
532	}	540	}
533		541
		542	/** coroutine stack handling ************************************************/
		543
534	static void	544	static void
535	setup_coro (struct coro *coro)	545	setup_coro (pTHX_ struct coro *coro)
536	{	546	{
537	/*	547	/*
538	* emulate part of the perl startup here.	548	* emulate part of the perl startup here.
539	*/	549	*/
540	dTHX;	550	coro_init_stacks (aTHX);
		551
		552	PL_curcop = &PL_compiling;
		553	PL_in_eval = EVAL_NULL;
		554	PL_comppad = 0;
		555	PL_curpm = 0;
		556	PL_localizing = 0;
		557	PL_dirty = 0;
		558	PL_restartop = 0;
		559
		560	{
		561	dSP;
		562	LOGOP myop;
		563
		564	SvREFCNT_dec (GvAV (PL_defgv));
		565	GvAV (PL_defgv) = coro->args; coro->args = 0;
		566
		567	Zero (&myop, 1, LOGOP);
		568	myop.op_next = Nullop;
		569	myop.op_flags = OPf_WANT_VOID;
		570
		571	PUSHMARK (SP);
		572	XPUSHs (av_shift (GvAV (PL_defgv)));
		573	PUTBACK;
		574	PL_op = (OP *)&myop;
		575	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		576	SPAGAIN;
		577	}
		578
		579	ENTER; /* necessary e.g. for dounwind */
		580	}
		581
		582	static void
		583	free_coro_mortal (pTHX)
		584	{
		585	if (coro_mortal)
		586	{
		587	SvREFCNT_dec (coro_mortal);
		588	coro_mortal = 0;
		589	}
		590	}
		591
		592	/* inject a fake call to Coro::State::_cctx_init into the execution */
		593	/* _cctx_init shoukld be careful, as it could be called at almost any time */
		594	/* during execution of a pelr program */
		595	static void NOINLINE
		596	prepare_cctx (pTHX_ coro_cctx *cctx)
		597	{
541	dSP;	598	dSP;
542	UNOP myop;	599	LOGOP myop;
543	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
544		600
545	coro_init_stacks (aTHX);
546	/*PL_curcop = 0;*/
547	/*PL_in_eval = PL_in_eval;*/ /* inherit */
548	SvREFCNT_dec (GvAV (PL_defgv));
549	GvAV (PL_defgv) = coro->args; coro->args = 0;
550
551	SPAGAIN;
552
553	Zero (&myop, 1, UNOP);	601	Zero (&myop, 1, LOGOP);
554	myop.op_next = Nullop;	602	myop.op_next = PL_op;
555	myop.op_flags = OPf_WANT_VOID;	603	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
556		604
		605	PUSHMARK (SP);
		606	EXTEND (SP, 2);
		607	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		608	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		609	PUTBACK;
557	PL_op = (OP *)&myop;	610	PL_op = (OP *)&myop;
558
559	PUSHMARK(SP);
560	XPUSHs (sub_init);
561	PUTBACK;
562	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	611	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
563	SPAGAIN;	612	SPAGAIN;
564
565	ENTER; /* necessary e.g. for dounwind */
566	}	613	}
567		614
568	static void	615	/*
569	free_coro_mortal ()	616	* this is a _very_ stripped down perl interpreter ;)
570	{	617	*/
571	if (coro_mortal)
572	{
573	SvREFCNT_dec (coro_mortal);
574	coro_mortal = 0;
575	}
576	}
577
578	static void	618	static void
579	coro_run (void *arg)	619	coro_run (void *arg)
580	{	620	{
		621	dTHX;
		622
		623	/* coro_run is the alternative tail of transfer(), so unlock here. */
		624	UNLOCK;
		625
		626	PL_top_env = &PL_start_env;
		627
		628	/* inject a fake subroutine call to cctx_init */
		629	prepare_cctx (aTHX_ (coro_cctx *)arg);
		630
		631	/* somebody or something will hit me for both perl_run and PL_restartop */
		632	PL_restartop = PL_op;
		633	perl_run (PL_curinterp);
		634
581	/*	635	/*
582	* this is a _very_ stripped down perl interpreter ;)	636	* If perl-run returns we assume exit() was being called or the coro
		637	* fell off the end, which seems to be the only valid (non-bug)
		638	* reason for perl_run to return. We try to exit by jumping to the
		639	* bootstrap-time "top" top_env, as we cannot restore the "main"
		640	* coroutine as Coro has no such concept
583	*/	641	*/
584	dTHX;
585	int ret;
586
587	UNLOCK;
588
589	PL_top_env = &PL_start_env;	642	PL_top_env = main_top_env;
590		643	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
591	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
592	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
593
594	/* continue at cctx_init, without entersub */
595	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
596
597	/* somebody will hit me for both perl_run and PL_restartop */
598	ret = perl_run (aTHX_ PERL_GET_CONTEXT);
599	printf ("ret %d\n", ret);//D
600
601	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
602	abort ();
603	}	644	}
604		645
605	static coro_stack *	646	static coro_cctx *
606	stack_new ()	647	cctx_new ()
607	{	648	{
608	coro_stack *stack;	649	coro_cctx *cctx;
		650	void *stack_start;
		651	size_t stack_size;
609		652
		653	++cctx_count;
		654
610	New (0, stack, 1, coro_stack);	655	Newz (0, cctx, 1, coro_cctx);
611		656
612	#if HAVE_MMAP	657	#if HAVE_MMAP
613		658
614	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	659	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
615	/* mmap suppsedly does allocate-on-write for us */	660	/* mmap supposedly does allocate-on-write for us */
616	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	661	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
617		662
618	if (stack->sptr == (void *)-1)	663	if (cctx->sptr != (void *)-1)
619	{
620	perror ("FATAL: unable to mmap stack for coroutine");
621	_exit (EXIT_FAILURE);
622	}	664	{
623
624	# if STACKGUARD	665	# if CORO_STACKGUARD
625	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	666	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
626	# endif	667	# endif
627		668	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
628	#else	669	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
629		670	cctx->mapped = 1;
630	stack->ssize = STACKSIZE * (long)sizeof (long);
631	New (0, stack->sptr, STACKSIZE, long);
632
633	if (!stack->sptr)
634	{	671	}
		672	else
		673	#endif
		674	{
		675	cctx->ssize = coro_stacksize * (long)sizeof (long);
		676	New (0, cctx->sptr, coro_stacksize, long);
		677
		678	if (!cctx->sptr)
		679	{
635	perror (stderr, "FATAL: unable to malloc stack for coroutine");	680	perror ("FATAL: unable to allocate stack for coroutine");
636	_exit (EXIT_FAILURE);	681	_exit (EXIT_FAILURE);
637	}	682	}
638		683
639	#endif	684	stack_start = cctx->sptr;
		685	stack_size = cctx->ssize;
		686	}
640		687
		688	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
641	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	689	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
642		690
643	return stack;	691	return cctx;
644	}	692	}
645		693
646	static void	694	static void
647	stack_free (coro_stack *stack)	695	cctx_destroy (coro_cctx *cctx)
648	{	696	{
649	if (!stack)	697	if (!cctx)
650	return;	698	return;
651		699
		700	--cctx_count;
		701
		702	#if CORO_USE_VALGRIND
		703	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		704	#endif
		705
652	#if HAVE_MMAP	706	#if HAVE_MMAP
		707	if (cctx->mapped)
653	munmap (stack->sptr, stack->ssize);	708	munmap (cctx->sptr, cctx->ssize);
654	#else
655	Safefree (stack->sptr);
656	#endif
657
658	Safefree (stack);
659	}
660
661	static coro_stack *stack_first;
662
663	static coro_stack *
664	stack_get ()
665	{
666	coro_stack *stack;
667
668	if (stack_first)
669	{
670	stack = stack_first;
671	stack_first = stack->next;
672	}
673	else	709	else
		710	#endif
		711	Safefree (cctx->sptr);
		712
		713	Safefree (cctx);
		714	}
		715
		716	static coro_cctx *
		717	cctx_get (pTHX)
		718	{
		719	while (cctx_first)
674	{	720	{
675	stack = stack_new ();	721	coro_cctx *cctx = cctx_first;
		722	cctx_first = cctx->next;
		723	--cctx_idle;
		724
		725	if (cctx->ssize >= coro_stacksize)
		726	return cctx;
		727
		728	cctx_destroy (cctx);
		729	}
		730
676	PL_op = PL_op->op_next;	731	PL_op = PL_op->op_next;
		732	return cctx_new ();
		733	}
		734
		735	static void
		736	cctx_put (coro_cctx *cctx)
		737	{
		738	/* free another cctx if overlimit */
		739	if (cctx_idle >= MAX_IDLE_CCTX)
		740	{
		741	coro_cctx *first = cctx_first;
		742	cctx_first = first->next;
		743	--cctx_idle;
		744
		745	assert (!first->inuse);
		746	cctx_destroy (first);
677	}	747	}
678		748
679	return stack;	749	++cctx_idle;
		750	cctx->next = cctx_first;
		751	cctx_first = cctx;
680	}	752	}
681		753
682	static void	754	/** coroutine switching *****************************************************/
683	stack_put (coro_stack *stack)
684	{
685	stack->next = stack_first;
686	stack_first = stack;
687	}
688		755
689	/* never call directly, always through the coro_state_transfer global variable */	756	/* never call directly, always through the coro_state_transfer global variable */
690	static void	757	static void NOINLINE
691	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	758	transfer (pTHX_ struct coro *prev, struct coro *next)
692	{	759	{
693	dSTACKLEVEL;	760	dSTACKLEVEL;
694		761
695	/* sometimes transfer is only called to set idle_sp */	762	/* sometimes transfer is only called to set idle_sp */
696	if (flags == TRANSFER_SET_STACKLEVEL)	763	if (!next)
		764	{
697	((coro_stack *)prev)->idle_sp = STACKLEVEL;	765	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		766	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		767	}
698	else if (prev != next)	768	else if (prev != next)
699	{	769	{
700	coro_stack *prev__stack;	770	coro_cctx *prev__cctx;
		771
		772	if (prev->flags & CF_NEW)
		773	{
		774	/* create a new empty context */
		775	Newz (0, prev->cctx, 1, coro_cctx);
		776	prev->cctx->inuse = 1;
		777	prev->flags &= ~CF_NEW;
		778	prev->flags |= CF_RUNNING;
		779	}
		780
		781	/*TODO: must not croak here */
		782	if (!prev->flags & CF_RUNNING)
		783	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		784
		785	if (next->flags & CF_RUNNING)
		786	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		787
		788	if (next->flags & CF_DESTROYED)
		789	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		790
		791	prev->flags &= ~CF_RUNNING;
		792	next->flags |= CF_RUNNING;
701		793
702	LOCK;	794	LOCK;
703		795
704	if (next->mainstack)	796	if (next->flags & CF_NEW)
705	{	797	{
706	/* coroutine already started */	798	/* need to start coroutine */
707	SAVE (prev, flags);	799	next->flags &= ~CF_NEW;
708	LOAD (next);	800	/* first get rid of the old state */
		801	save_perl (aTHX_ prev);
		802	/* setup coroutine call */
		803	setup_coro (aTHX_ next);
		804	/* need a new stack */
		805	assert (!next->cctx);
709	}	806	}
710	else	807	else
711	{	808	{
712	/* need to start coroutine */	809	/* coroutine already started */
713	/* first get rid of the old state */	810	save_perl (aTHX_ prev);
714	SAVE (prev, -1);	811	load_perl (aTHX_ next);
715	/* setup coroutine call */
716	setup_coro (next);
717	/* need a stack */
718	next->stack = 0;
719	}	812	}
720		813
721	if (!prev->stack)
722	/* create a new empty context */
723	Newz (0, prev->stack, 1, coro_stack);
724
725	prev__stack = prev->stack;	814	prev__cctx = prev->cctx;
726		815
727	/* possibly "free" the stack */	816	/* possibly "free" the cctx */
728	if (prev__stack->idle_sp == STACKLEVEL)	817	if (prev__cctx->idle_sp == STACKLEVEL)
729	{	818	{
730	stack_put (prev__stack);	819	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		820	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		821
731	prev->stack = 0;	822	prev->cctx = 0;
		823
		824	cctx_put (prev__cctx);
		825	prev__cctx->inuse = 0;
732	}	826	}
733		827
734	if (!next->stack)	828	if (!next->cctx)
735	next->stack = stack_get ();
736
737	if (prev__stack != next->stack)
738	{	829	{
739	prev__stack->top_env = PL_top_env;	830	next->cctx = cctx_get (aTHX);
740	PL_top_env = next->stack->top_env;	831	assert (!next->cctx->inuse);
741	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	832	next->cctx->inuse = 1;
742	}	833	}
743		834
		835	if (prev__cctx != next->cctx)
		836	{
		837	prev__cctx->top_env = PL_top_env;
		838	PL_top_env = next->cctx->top_env;
		839	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		840	}
		841
744	free_coro_mortal ();	842	free_coro_mortal (aTHX);
745
746	UNLOCK;	843	UNLOCK;
747	}	844	}
748	}	845	}
749		846
750	/* use this function pointer to call the above function */
751	/* this is done to increase chances of the compiler not inlining the call */
752	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
753	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
754
755	struct transfer_args	847	struct transfer_args
756	{	848	{
757	struct coro *prev, *next;	849	struct coro *prev, *next;
758	int flags;
759	};	850	};
760		851
761	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	852	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
762		853
		854	/** high level stuff ********************************************************/
		855
763	static void	856	static int
764	coro_state_destroy (struct coro *coro)	857	coro_state_destroy (pTHX_ struct coro *coro)
765	{	858	{
766	if (coro->refcnt--)	859	if (coro->flags & CF_DESTROYED)
767	return;	860	return 0;
		861
		862	coro->flags |= CF_DESTROYED;
		863
		864	if (coro->flags & CF_READY)
		865	{
		866	/* reduce nready, as destroying a ready coro effectively unreadies it */
		867	/* alternative: look through all ready queues and remove the coro */
		868	LOCK;
		869	--coro_nready;
		870	UNLOCK;
		871	}
		872	else
		873	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
768		874
769	if (coro->mainstack && coro->mainstack != main_mainstack)	875	if (coro->mainstack && coro->mainstack != main_mainstack)
770	{	876	{
771	struct coro temp;	877	struct coro temp;
772		878
773	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	879	assert (!(coro->flags & CF_RUNNING));
		880
		881	Zero (&temp, 1, struct coro);
		882	temp.save = CORO_SAVE_DEF;
		883
		884	if (coro->flags & CF_RUNNING)
		885	croak ("FATAL: tried to destroy currently running coroutine");
		886
		887	save_perl (aTHX_ &temp);
774	LOAD (aTHX_ coro);	888	load_perl (aTHX_ coro);
775		889
776	destroy_stacks (aTHX);	890	coro_destroy_stacks (aTHX);
777		891
778	LOAD ((&temp)); /* this will get rid of defsv etc.. */	892	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
779		893
780	coro->mainstack = 0;	894	coro->mainstack = 0;
781	}	895	}
782		896
783	stack_free (coro->stack);	897	cctx_destroy (coro->cctx);
784	SvREFCNT_dec (coro->args);	898	SvREFCNT_dec (coro->args);
785	Safefree (coro);	899
		900	return 1;
786	}	901	}
787		902
788	static int	903	static int
789	coro_state_clear (SV *sv, MAGIC *mg)	904	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
790	{	905	{
791	struct coro *coro = (struct coro *)mg->mg_ptr;	906	struct coro *coro = (struct coro *)mg->mg_ptr;
792	mg->mg_ptr = 0;	907	mg->mg_ptr = 0;
793		908
		909	if (--coro->refcnt < 0)
		910	{
794	coro_state_destroy (coro);	911	coro_state_destroy (aTHX_ coro);
		912	Safefree (coro);
		913	}
795		914
796	return 0;	915	return 0;
797	}	916	}
798		917
799	static int	918	static int
800	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	919	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
801	{	920	{
802	struct coro *coro = (struct coro *)mg->mg_ptr;	921	struct coro *coro = (struct coro *)mg->mg_ptr;
803		922
804	++coro->refcnt;	923	++coro->refcnt;
805		924
806	return 0;	925	return 0;
807	}	926	}
808		927
809	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	928	static MGVTBL coro_state_vtbl = {
		929	0, 0, 0, 0,
		930	coro_state_free,
		931	0,
		932	#ifdef MGf_DUP
		933	coro_state_dup,
		934	#else
		935	# define MGf_DUP 0
		936	#endif
		937	};
810		938
811	static struct coro *	939	static struct coro *
812	SvSTATE (SV *coro)	940	SvSTATE_ (pTHX_ SV *coro)
813	{	941	{
814	HV *stash;	942	HV *stash;
815	MAGIC *mg;	943	MAGIC *mg;
816		944
817	if (SvROK (coro))	945	if (SvROK (coro))
…		…
823	/* very slow, but rare, check */	951	/* very slow, but rare, check */
824	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	952	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
825	croak ("Coro::State object required");	953	croak ("Coro::State object required");
826	}	954	}
827		955
828	mg = SvMAGIC (coro);	956	mg = CORO_MAGIC (coro);
829	assert (mg->mg_type == PERL_MAGIC_ext);
830	return (struct coro *)mg->mg_ptr;	957	return (struct coro *)mg->mg_ptr;
831	}	958	}
832		959
		960	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		961
833	static void	962	static void
834	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	963	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
835	{	964	{
836	ta->prev = SvSTATE (prev);	965	ta->prev = SvSTATE (prev_sv);
837	ta->next = SvSTATE (next);	966	ta->next = SvSTATE (next_sv);
838	ta->flags = flags;
839	}	967	}
840		968
841	static void	969	static void
842	api_transfer (SV *prev, SV *next, int flags)	970	api_transfer (SV *prev_sv, SV *next_sv)
843	{	971	{
844	dTHX;	972	dTHX;
845	struct transfer_args ta;	973	struct transfer_args ta;
846		974
847	prepare_transfer (aTHX_ &ta, prev, next, flags);	975	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
848	TRANSFER (ta);	976	TRANSFER (ta);
849	}	977	}
850		978
		979	static int
		980	api_save (SV *coro_sv, int new_save)
		981	{
		982	dTHX;
		983	struct coro *coro = SvSTATE (coro_sv);
		984	int old_save = coro->save;
		985
		986	if (new_save >= 0)
		987	coro->save = new_save;
		988
		989	return old_save;
		990	}
		991
851	/** Coro ********************************************************************/	992	/** Coro ********************************************************************/
852		993
853	#define PRIO_MAX 3
854	#define PRIO_HIGH 1
855	#define PRIO_NORMAL 0
856	#define PRIO_LOW -1
857	#define PRIO_IDLE -3
858	#define PRIO_MIN -4
859
860	/* for Coro.pm */
861	static GV *coro_current, *coro_idle;
862	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
863	static int coro_nready;
864
865	static void	994	static void
866	coro_enq (pTHX_ SV *sv)	995	coro_enq (pTHX_ SV *coro_sv)
867	{	996	{
868	int prio;
869
870	if (SvTYPE (sv) != SVt_PVHV)
871	croak ("Coro::ready tried to enqueue something that is not a coroutine");
872
873	prio = SvSTATE (sv)->prio;
874
875	av_push (coro_ready [prio - PRIO_MIN], sv);	997	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
876	coro_nready++;
877	}	998	}
878		999
879	static SV *	1000	static SV *
880	coro_deq (pTHX_ int min_prio)	1001	coro_deq (pTHX_ int min_prio)
881	{	1002	{
…		…
885	if (min_prio < 0)	1006	if (min_prio < 0)
886	min_prio = 0;	1007	min_prio = 0;
887		1008
888	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1009	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
889	if (AvFILLp (coro_ready [prio]) >= 0)	1010	if (AvFILLp (coro_ready [prio]) >= 0)
890	{
891	coro_nready--;
892	return av_shift (coro_ready [prio]);	1011	return av_shift (coro_ready [prio]);
893	}
894		1012
895	return 0;	1013	return 0;
896	}	1014	}
897		1015
898	static void	1016	static int
899	api_ready (SV *coro)	1017	api_ready (SV *coro_sv)
900	{	1018	{
901	dTHX;	1019	dTHX;
		1020	struct coro *coro;
902		1021
903	if (SvROK (coro))	1022	if (SvROK (coro_sv))
904	coro = SvRV (coro);	1023	coro_sv = SvRV (coro_sv);
		1024
		1025	coro = SvSTATE (coro_sv);
		1026
		1027	if (coro->flags & CF_READY)
		1028	return 0;
		1029
		1030	coro->flags |= CF_READY;
905		1031
906	LOCK;	1032	LOCK;
907	coro_enq (aTHX_ SvREFCNT_inc (coro));	1033	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1034	++coro_nready;
908	UNLOCK;	1035	UNLOCK;
909	}
910		1036
		1037	return 1;
		1038	}
		1039
911	static void	1040	static int
		1041	api_is_ready (SV *coro_sv)
		1042	{
		1043	dTHX;
		1044	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1045	}
		1046
		1047	static void
912	prepare_schedule (aTHX_ struct transfer_args *ta)	1048	prepare_schedule (pTHX_ struct transfer_args *ta)
913	{	1049	{
914	SV *current, *prev, *next;	1050	SV *prev_sv, *next_sv;
		1051
		1052	for (;;)
		1053	{
		1054	LOCK;
		1055	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1056
		1057	/* nothing to schedule: call the idle handler */
		1058	if (!next_sv)
		1059	{
		1060	dSP;
		1061	UNLOCK;
		1062
		1063	ENTER;
		1064	SAVETMPS;
		1065
		1066	PUSHMARK (SP);
		1067	PUTBACK;
		1068	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1069
		1070	FREETMPS;
		1071	LEAVE;
		1072	continue;
		1073	}
		1074
		1075	ta->next = SvSTATE (next_sv);
		1076
		1077	/* cannot transfer to destroyed coros, skip and look for next */
		1078	if (ta->next->flags & CF_DESTROYED)
		1079	{
		1080	UNLOCK;
		1081	SvREFCNT_dec (next_sv);
		1082	/* coro_nready is already taken care of by destroy */
		1083	continue;
		1084	}
		1085
		1086	--coro_nready;
		1087	UNLOCK;
		1088	break;
		1089	}
		1090
		1091	/* free this only after the transfer */
		1092	prev_sv = SvRV (coro_current);
		1093	SvRV_set (coro_current, next_sv);
		1094	ta->prev = SvSTATE (prev_sv);
		1095
		1096	assert (ta->next->flags & CF_READY);
		1097	ta->next->flags &= ~CF_READY;
915		1098
916	LOCK;	1099	LOCK;
917
918	current = GvSV (coro_current);
919
920	for (;;)
921	{
922	LOCK;
923
924	next = coro_deq (aTHX_ PRIO_MIN);
925
926	if (next)
927	break;
928
929	UNLOCK;
930
931	{
932	dSP;
933
934	ENTER;
935	SAVETMPS;
936
937	PUSHMARK (SP);
938	PUTBACK;
939	call_sv (GvSV (coro_idle), G_DISCARD);
940
941	FREETMPS;
942	LEAVE;
943	}
944	}
945
946	prev = SvRV (current);
947	SvRV (current) = next;
948
949	/* free this only after the transfer */
950	free_coro_mortal ();	1100	free_coro_mortal (aTHX);
951	coro_mortal = prev;	1101	coro_mortal = prev_sv;
952
953	ta->prev = SvSTATE (prev);
954	ta->next = SvSTATE (next);
955	ta->flags = TRANSFER_SAVE_ALL;
956
957	UNLOCK;	1102	UNLOCK;
958	}	1103	}
959		1104
960	static void	1105	static void
961	prepare_cede (aTHX_ struct transfer_args *ta)	1106	prepare_cede (pTHX_ struct transfer_args *ta)
962	{	1107	{
963	LOCK;	1108	api_ready (coro_current);
964	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965	UNLOCK;
966
967	prepare_schedule (ta);	1109	prepare_schedule (aTHX_ ta);
		1110	}
		1111
		1112	static int
		1113	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1114	{
		1115	if (coro_nready)
		1116	{
		1117	SV *prev = SvRV (coro_current);
		1118	prepare_schedule (aTHX_ ta);
		1119	api_ready (prev);
		1120	return 1;
		1121	}
		1122	else
		1123	return 0;
968	}	1124	}
969		1125
970	static void	1126	static void
971	api_schedule (void)	1127	api_schedule (void)
972	{	1128	{
973	dTHX;	1129	dTHX;
974	struct transfer_args ta;	1130	struct transfer_args ta;
975		1131
976	prepare_schedule (&ta);	1132	prepare_schedule (aTHX_ &ta);
977	TRANSFER (ta);	1133	TRANSFER (ta);
978	}	1134	}
979		1135
980	static void	1136	static int
981	api_cede (void)	1137	api_cede (void)
982	{	1138	{
983	dTHX;	1139	dTHX;
984	struct transfer_args ta;	1140	struct transfer_args ta;
985		1141
986	prepare_cede (&ta);	1142	prepare_cede (aTHX_ &ta);
		1143
		1144	if (ta.prev != ta.next)
		1145	{
987	TRANSFER (ta);	1146	TRANSFER (ta);
		1147	return 1;
		1148	}
		1149	else
		1150	return 0;
		1151	}
		1152
		1153	static int
		1154	api_cede_notself (void)
		1155	{
		1156	dTHX;
		1157	struct transfer_args ta;
		1158
		1159	if (prepare_cede_notself (aTHX_ &ta))
		1160	{
		1161	TRANSFER (ta);
		1162	return 1;
		1163	}
		1164	else
		1165	return 0;
988	}	1166	}
989		1167
990	MODULE = Coro::State PACKAGE = Coro::State	1168	MODULE = Coro::State PACKAGE = Coro::State
991		1169
992	PROTOTYPES: DISABLE	1170	PROTOTYPES: DISABLE
…		…
998	#endif	1176	#endif
999	BOOT_PAGESIZE;	1177	BOOT_PAGESIZE;
1000		1178
1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1179	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002		1180
1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1181	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1182	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1183	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1184	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1185	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1186	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1187	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1006		1188
1007	main_mainstack = PL_mainstack;	1189	main_mainstack = PL_mainstack;
		1190	main_top_env = PL_top_env;
		1191
		1192	while (main_top_env->je_prev)
		1193	main_top_env = main_top_env->je_prev;
1008		1194
1009	coroapi.ver = CORO_API_VERSION;	1195	coroapi.ver = CORO_API_VERSION;
1010	coroapi.transfer = api_transfer;	1196	coroapi.transfer = api_transfer;
1011		1197
1012	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1198	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1020	HV *hv;	1206	HV *hv;
1021	int i;	1207	int i;
1022		1208
1023	Newz (0, coro, 1, struct coro);	1209	Newz (0, coro, 1, struct coro);
1024	coro->args = newAV ();	1210	coro->args = newAV ();
		1211	coro->save = CORO_SAVE_DEF;
		1212	coro->flags = CF_NEW;
1025		1213
1026	hv = newHV ();	1214	hv = newHV ();
1027	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1215	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1028	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1216	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1029		1217
1030	for (i = 1; i < items; i++)	1218	for (i = 1; i < items; i++)
1031	av_push (coro->args, newSVsv (ST (i)));	1219	av_push (coro->args, newSVsv (ST (i)));
1032
1033	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1034	/*coro->stack = 0;*/
1035	}	1220	}
1036	OUTPUT:	1221	OUTPUT:
		1222	RETVAL
		1223
		1224	int
		1225	save (SV *coro, int new_save = -1)
		1226	CODE:
		1227	RETVAL = api_save (coro, new_save);
		1228	OUTPUT:
		1229	RETVAL
		1230
		1231	int
		1232	save_also (SV *coro_sv, int save_also)
		1233	CODE:
		1234	{
		1235	struct coro *coro = SvSTATE (coro_sv);
		1236	RETVAL = coro->save;
		1237	coro->save |= save_also;
		1238	}
		1239	OUTPUT:
1037	RETVAL	1240	RETVAL
1038		1241
1039	void	1242	void
1040	_set_stacklevel (...)	1243	_set_stacklevel (...)
1041	ALIAS:	1244	ALIAS:
1042	Coro::State::transfer = 1	1245	Coro::State::transfer = 1
1043	Coro::schedule = 2	1246	Coro::schedule = 2
1044	Coro::cede = 3	1247	Coro::cede = 3
1045	Coro::Cont::yield = 4	1248	Coro::cede_notself = 4
1046	CODE:	1249	CODE:
1047	{	1250	{
1048	struct transfer_args ta;	1251	struct transfer_args ta;
1049		1252
1050	switch (ix)	1253	switch (ix)
1051	{	1254	{
1052	case 0:	1255	case 0:
1053	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1256	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1054	ta.next = 0;	1257	ta.next = 0;
1055	ta.flags = TRANSFER_SET_STACKLEVEL;
1056	break;	1258	break;
1057		1259
1058	case 1:	1260	case 1:
1059	if (items != 3)	1261	if (items != 2)
1060	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1262	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1061		1263
1062	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1264	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1063	break;	1265	break;
1064		1266
1065	case 2:	1267	case 2:
1066	prepare_schedule (&ta);	1268	prepare_schedule (aTHX_ &ta);
1067	break;	1269	break;
1068		1270
1069	case 3:	1271	case 3:
1070	prepare_cede (&ta);	1272	prepare_cede (aTHX_ &ta);
1071	break;	1273	break;
1072		1274
1073	case 4:	1275	case 4:
1074	{	1276	if (!prepare_cede_notself (aTHX_ &ta))
1075	SV *yieldstack;	1277	XSRETURN_EMPTY;
1076	SV *sv;
1077	AV *defav = GvAV (PL_defgv);
1078		1278
1079	yieldstack = *hv_fetch (
1080	(HV *)SvRV (GvSV (coro_current)),
1081	"yieldstack", sizeof ("yieldstack") - 1,
1082	0
1083	);
1084
1085	/* set up @_ -- ugly */
1086	av_clear (defav);
1087	av_fill (defav, items - 1);
1088	while (items--)
1089	av_store (defav, items, SvREFCNT_inc (ST(items)));
1090
1091	sv = av_pop ((AV *)SvRV (yieldstack));
1092	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1093	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1094	ta.flags = 0;
1095	SvREFCNT_dec (sv);
1096	}
1097	break;	1279	break;
1098
1099	}	1280	}
1100		1281
		1282	BARRIER;
1101	TRANSFER (ta);	1283	TRANSFER (ta);
1102	}
1103		1284
1104	void	1285	if (GIMME_V != G_VOID && ta.next != ta.prev)
1105	_clone_state_from (SV *dst, SV *src)	1286	XSRETURN_YES;
		1287	}
		1288
		1289	bool
		1290	_destroy (SV *coro_sv)
1106	CODE:	1291	CODE:
1107	{	1292	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1108	struct coro *coro_src = SvSTATE (src);	1293	OUTPUT:
1109		1294	RETVAL
1110	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1111
1112	++coro_src->refcnt;
1113	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1114	}
1115
1116	void
1117	_nonlocal_goto (IV nextop)
1118	CODE:
1119	/* uuh, somebody will kill me again for this */
1120	PL_op->op_next = INT2PTR (OP *, nextop);
1121		1295
1122	void	1296	void
1123	_exit (code)	1297	_exit (code)
1124	int code	1298	int code
1125	PROTOTYPE: $	1299	PROTOTYPE: $
1126	CODE:	1300	CODE:
1127	_exit (code);	1301	_exit (code);
1128		1302
		1303	int
		1304	cctx_stacksize (int new_stacksize = 0)
		1305	CODE:
		1306	RETVAL = coro_stacksize;
		1307	if (new_stacksize)
		1308	coro_stacksize = new_stacksize;
		1309	OUTPUT:
		1310	RETVAL
		1311
		1312	int
		1313	cctx_count ()
		1314	CODE:
		1315	RETVAL = cctx_count;
		1316	OUTPUT:
		1317	RETVAL
		1318
		1319	int
		1320	cctx_idle ()
		1321	CODE:
		1322	RETVAL = cctx_idle;
		1323	OUTPUT:
		1324	RETVAL
		1325
1129	MODULE = Coro::State PACKAGE = Coro	1326	MODULE = Coro::State PACKAGE = Coro
1130		1327
1131	BOOT:	1328	BOOT:
1132	{	1329	{
1133	int i;	1330	int i;
…		…
1139	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1336	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1140	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1337	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1141	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1338	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1142	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1339	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1143		1340
1144	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1341	coro_current = get_sv ("Coro::current", FALSE);
1145	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1342	SvREADONLY_on (coro_current);
1146		1343
1147	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1344	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1148	coro_ready[i] = newAV ();	1345	coro_ready[i] = newAV ();
1149		1346
1150	{	1347	{
1151	SV *sv = perl_get_sv("Coro::API", 1);	1348	SV *sv = perl_get_sv("Coro::API", 1);
1152		1349
1153	coroapi.schedule = api_schedule;	1350	coroapi.schedule = api_schedule;
		1351	coroapi.save = api_save;
1154	coroapi.cede = api_cede;	1352	coroapi.cede = api_cede;
		1353	coroapi.cede_notself = api_cede_notself;
1155	coroapi.ready = api_ready;	1354	coroapi.ready = api_ready;
		1355	coroapi.is_ready = api_is_ready;
1156	coroapi.nready = &coro_nready;	1356	coroapi.nready = &coro_nready;
1157	coroapi.current = coro_current;	1357	coroapi.current = coro_current;
1158		1358
1159	GCoroAPI = &coroapi;	1359	GCoroAPI = &coroapi;
1160	sv_setiv (sv, (IV)&coroapi);	1360	sv_setiv (sv, (IV)&coroapi);
1161	SvREADONLY_on (sv);	1361	SvREADONLY_on (sv);
1162	}	1362	}
1163	}	1363	}
		1364
		1365	void
		1366	_set_current (SV *current)
		1367	PROTOTYPE: $
		1368	CODE:
		1369	SvREFCNT_dec (SvRV (coro_current));
		1370	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1164		1371
1165	int	1372	int
1166	prio (Coro::State coro, int newprio = 0)	1373	prio (Coro::State coro, int newprio = 0)
1167	ALIAS:	1374	ALIAS:
1168	nice = 1	1375	nice = 1
…		…
1171	RETVAL = coro->prio;	1378	RETVAL = coro->prio;
1172		1379
1173	if (items > 1)	1380	if (items > 1)
1174	{	1381	{
1175	if (ix)	1382	if (ix)
1176	newprio += coro->prio;	1383	newprio = coro->prio - newprio;
1177		1384
1178	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1385	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1179	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1386	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1180		1387
1181	coro->prio = newprio;	1388	coro->prio = newprio;
1182	}	1389	}
1183	}	1390	}
		1391	OUTPUT:
		1392	RETVAL
1184		1393
1185	void	1394	SV *
1186	ready (SV *self)	1395	ready (SV *self)
1187	PROTOTYPE: $	1396	PROTOTYPE: $
1188	CODE:	1397	CODE:
1189	api_ready (self);	1398	RETVAL = boolSV (api_ready (self));
		1399	OUTPUT:
		1400	RETVAL
		1401
		1402	SV *
		1403	is_ready (SV *self)
		1404	PROTOTYPE: $
		1405	CODE:
		1406	RETVAL = boolSV (api_is_ready (self));
		1407	OUTPUT:
		1408	RETVAL
1190		1409
1191	int	1410	int
1192	nready (...)	1411	nready (...)
1193	PROTOTYPE:	1412	PROTOTYPE:
1194	CODE:	1413	CODE:
…		…
1200		1419
1201	SV *	1420	SV *
1202	_get_state ()	1421	_get_state ()
1203	CODE:	1422	CODE:
1204	{	1423	{
1205	struct {	1424	struct io_state *data;
1206	int errorno;
1207	int laststype;
1208	int laststatval;
1209	Stat_t statcache;
1210	} data;
1211		1425
		1426	RETVAL = newSV (sizeof (struct io_state));
		1427	data = (struct io_state *)SvPVX (RETVAL);
		1428	SvCUR_set (RETVAL, sizeof (struct io_state));
		1429	SvPOK_only (RETVAL);
		1430
1212	data.errorno = errno;	1431	data->errorno = errno;
1213	data.laststype = PL_laststype;	1432	data->laststype = PL_laststype;
1214	data.laststatval = PL_laststatval;	1433	data->laststatval = PL_laststatval;
1215	data.statcache = PL_statcache;	1434	data->statcache = PL_statcache;
1216
1217	RETVAL = newSVpvn ((char *)&data, sizeof data);
1218	}	1435	}
1219	OUTPUT:	1436	OUTPUT:
1220	RETVAL	1437	RETVAL
1221		1438
1222	void	1439	void
1223	_set_state (char *data_)	1440	_set_state (char *data_)
1224	PROTOTYPE: $	1441	PROTOTYPE: $
1225	CODE:	1442	CODE:
1226	{	1443	{
1227	struct {	1444	struct io_state *data = (void *)data_;
1228	int errorno;
1229	int laststype;
1230	int laststatval;
1231	Stat_t statcache;
1232	} *data = (void *)data_;
1233		1445
1234	errno = data->errorno;	1446	errno = data->errorno;
1235	PL_laststype = data->laststype;	1447	PL_laststype = data->laststype;
1236	PL_laststatval = data->laststatval;	1448	PL_laststatval = data->laststatval;
1237	PL_statcache = data->statcache;	1449	PL_statcache = data->statcache;
1238	}	1450	}
		1451

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