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Comparing Coro/Coro/State.xs (file contents):
Revision 1.94 by root, Sun Nov 26 17:14:15 2006 UTC vs.
Revision 1.147 by root, Mon Mar 19 15:50:48 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <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 */
86	static HV *coro_state_stash, *coro_stash;	134	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
88		136
		137	static struct coro_cctx *cctx_first;
		138	static int cctx_count, cctx_idle;
		139
89	/* this is a structure representing a c-level coroutine */	140	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	141	typedef struct coro_cctx {
91	struct coro_stack *next;	142	struct coro_cctx *next;
92		143
93	/* the stack */	144	/* the stack */
94	void *sptr;	145	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	146	size_t ssize;
96		147
97	/* cpu state */	148	/* cpu state */
98	void *idle_sp; /* original stacklevel when coroutine was created */	149	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		150	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
99	JMPENV *top_env;	151	JMPENV *top_env;
100	coro_context cctx;	152	coro_context cctx;
101	} coro_stack;
102		153
103	/* the (fake) coro_stack representing the main program */	154	#if CORO_USE_VALGRIND
104	static coro_stack *main_stack;	155	int valgrind_id;
		156	#endif
		157	char inuse, mapped;
		158	} coro_cctx;
		159
		160	enum {
		161	CF_RUNNING = 0x0001, /* coroutine is running */
		162	CF_READY = 0x0002, /* coroutine is ready */
		163	CF_NEW = 0x0004, /* has never been switched to */
		164	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		165	};
105		166
106	/* this is a structure representing a perl-level coroutine */	167	/* this is a structure representing a perl-level coroutine */
107	struct coro {	168	struct coro {
108	/* the c coroutine allocated to this perl coroutine, if any */	169	/* the c coroutine allocated to this perl coroutine, if any */
109	coro_stack *stack;	170	coro_cctx *cctx;
110		171
111	/* data associated with this coroutine (initial args) */	172	/* data associated with this coroutine (initial args) */
112	AV *args;	173	AV *args;
113	int refcnt;	174	int refcnt;
		175	int save; /* CORO_SAVE flags */
		176	int flags; /* CF_ flags */
114		177
115	/* optionally saved, might be zero */	178	/* optionally saved, might be zero */
116	AV *defav;	179	AV *defav; /* @_ */
117	SV *defsv;	180	SV *defsv; /* $_ */
118	SV *errsv;	181	SV *errsv; /* $@ */
		182	GV *deffh; /* default filehandle */
		183	SV *irssv; /* $/ */
		184	SV *irssv_sv; /* real $/ cache */
119		185
120	/* saved global state not related to stacks */	186	#define VAR(name,type) type name;
121	U8 dowarn;	187	# include "state.h"
122	I32 in_eval;	188	#undef VAR
123
124	/* the stacks and related info (callchain etc..) */
125	PERL_SI *curstackinfo;
126	AV *curstack;
127	AV *mainstack;
128	SV **stack_sp;
129	OP *op;
130	SV **curpad;
131	AV *comppad;
132	CV *compcv;
133	SV **stack_base;
134	SV **stack_max;
135	SV **tmps_stack;
136	I32 tmps_floor;
137	I32 tmps_ix;
138	I32 tmps_max;
139	I32 *markstack;
140	I32 *markstack_ptr;
141	I32 *markstack_max;
142	I32 *scopestack;
143	I32 scopestack_ix;
144	I32 scopestack_max;
145	ANY *savestack;
146	I32 savestack_ix;
147	I32 savestack_max;
148	OP **retstack;
149	I32 retstack_ix;
150	I32 retstack_max;
151	PMOP *curpm;
152	COP *curcop;
153		189
154	/* coro process data */	190	/* coro process data */
155	int prio;	191	int prio;
156	};	192	};
157		193
158	typedef struct coro *Coro__State;	194	typedef struct coro *Coro__State;
159	typedef struct coro *Coro__State_or_hashref;	195	typedef struct coro *Coro__State_or_hashref;
160		196
		197	/** Coro ********************************************************************/
		198
		199	#define PRIO_MAX 3
		200	#define PRIO_HIGH 1
		201	#define PRIO_NORMAL 0
		202	#define PRIO_LOW -1
		203	#define PRIO_IDLE -3
		204	#define PRIO_MIN -4
		205
		206	/* for Coro.pm */
		207	static SV *coro_current;
		208	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		209	static int coro_nready;
		210
		211	/** lowlevel stuff **********************************************************/
		212
161	static AV *	213	static AV *
162	coro_clone_padlist (pTHX_ CV *cv)	214	coro_clone_padlist (pTHX_ CV *cv)
163	{	215	{
164	AV *padlist = CvPADLIST (cv);	216	AV *padlist = CvPADLIST (cv);
165	AV *newpadlist, *newpad;	217	AV *newpadlist, *newpad;
166		218
167	newpadlist = newAV ();	219	newpadlist = newAV ();
168	AvREAL_off (newpadlist);	220	AvREAL_off (newpadlist);
169	#if PERL_VERSION < 9	221	#if PERL_VERSION_ATLEAST (5,9,0)
		222	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		223	#else
170	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	224	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
171	#else
172	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
173	#endif	225	#endif
174	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	226	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
175	--AvFILLp (padlist);	227	--AvFILLp (padlist);
176		228
177	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	229	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
221		273
222	#define PERL_MAGIC_coro PERL_MAGIC_ext	274	#define PERL_MAGIC_coro PERL_MAGIC_ext
223		275
224	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	276	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
225		277
		278	#define CORO_MAGIC(cv) \
		279	SvMAGIC (cv) \
		280	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		281	? SvMAGIC (cv) \
		282	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		283	: 0
		284
226	/* the next two functions merely cache the padlists */	285	/* the next two functions merely cache the padlists */
227	static void	286	static void
228	get_padlist (pTHX_ CV *cv)	287	get_padlist (pTHX_ CV *cv)
229	{	288	{
230	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	289	MAGIC *mg = CORO_MAGIC (cv);
		290	AV *av;
231		291
232	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	292	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
233	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	293	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
234	else	294	else
235	{	295	{
236	#if 0	296	#if CORO_PREFER_PERL_FUNCTIONS
237	/* this should work - but it doesn't :( */	297	/* this is probably cleaner, but also slower? */
238	CV *cp = Perl_cv_clone (aTHX_ cv);	298	CV *cp = Perl_cv_clone (cv);
239	CvPADLIST (cv) = CvPADLIST (cp);	299	CvPADLIST (cv) = CvPADLIST (cp);
240	CvPADLIST (cp) = 0;	300	CvPADLIST (cp) = 0;
241	SvREFCNT_dec (cp);	301	SvREFCNT_dec (cp);
242	#else	302	#else
243	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	303	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
246	}	306	}
247		307
248	static void	308	static void
249	put_padlist (pTHX_ CV *cv)	309	put_padlist (pTHX_ CV *cv)
250	{	310	{
251	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	311	MAGIC *mg = CORO_MAGIC (cv);
		312	AV *av;
252		313
253	if (!mg)	314	if (!mg)
254	{	315	{
255	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	316	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
256	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	317	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
257	mg->mg_virtual = &vtbl_coro;	318	mg->mg_virtual = &vtbl_coro;
258	mg->mg_obj = (SV *)newAV ();	319	mg->mg_obj = (SV *)newAV ();
259	}	320	}
260		321
261	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	322	av = (AV *)mg->mg_obj;
		323
		324	if (AvFILLp (av) >= AvMAX (av))
		325	av_extend (av, AvMAX (av) + 1);
		326
		327	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
262	}	328	}
		329
		330	/** load & save, init *******************************************************/
263		331
264	#define SB do {	332	#define SB do {
265	#define SE } while (0)	333	#define SE } while (0)
266		334
267	#define LOAD(state) load_state(aTHX_ (state));
268	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
269
270	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	335	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
271		336
272	static void	337	static void
273	load_state(pTHX_ Coro__State c)	338	load_perl (pTHX_ Coro__State c)
274	{	339	{
275	PL_dowarn = c->dowarn;	340	#define VAR(name,type) PL_ ## name = c->name;
276	PL_in_eval = c->in_eval;	341	# include "state.h"
277		342	#undef VAR
278	PL_curstackinfo = c->curstackinfo;
279	PL_curstack = c->curstack;
280	PL_mainstack = c->mainstack;
281	PL_stack_sp = c->stack_sp;
282	PL_op = c->op;
283	PL_curpad = c->curpad;
284	PL_comppad = c->comppad;
285	PL_compcv = c->compcv;
286	PL_stack_base = c->stack_base;
287	PL_stack_max = c->stack_max;
288	PL_tmps_stack = c->tmps_stack;
289	PL_tmps_floor = c->tmps_floor;
290	PL_tmps_ix = c->tmps_ix;
291	PL_tmps_max = c->tmps_max;
292	PL_markstack = c->markstack;
293	PL_markstack_ptr = c->markstack_ptr;
294	PL_markstack_max = c->markstack_max;
295	PL_scopestack = c->scopestack;
296	PL_scopestack_ix = c->scopestack_ix;
297	PL_scopestack_max = c->scopestack_max;
298	PL_savestack = c->savestack;
299	PL_savestack_ix = c->savestack_ix;
300	PL_savestack_max = c->savestack_max;
301	#if PERL_VERSION < 9
302	PL_retstack = c->retstack;
303	PL_retstack_ix = c->retstack_ix;
304	PL_retstack_max = c->retstack_max;
305	#endif
306	PL_curpm = c->curpm;
307	PL_curcop = c->curcop;
308		343
309	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
310	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
311	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	346	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		347	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		348
		349	if (c->irssv)
		350	{
		351	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		352	{
		353	SvREFCNT_dec (c->irssv);
		354	c->irssv = 0;
		355	}
		356	else
		357	{
		358	REPLACE_SV (PL_rs, c->irssv);
		359	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		360	sv_setsv (c->irssv_sv, PL_rs);
		361	}
		362	}
312		363
313	{	364	{
314	dSP;	365	dSP;
315	CV *cv;	366	CV *cv;
316		367
317	/* now do the ugly restore mess */	368	/* now do the ugly restore mess */
318	while ((cv = (CV *)POPs))	369	while ((cv = (CV *)POPs))
319	{	370	{
320	AV *padlist = (AV *)POPs;
321
322	if (padlist)
323	{
324	put_padlist (aTHX_ cv); /* mark this padlist as available */	371	put_padlist (aTHX_ cv); /* mark this padlist as available */
325	CvPADLIST(cv) = padlist;	372	CvDEPTH (cv) = PTR2IV (POPs);
326	}	373	CvPADLIST (cv) = (AV *)POPs;
327
328	++CvDEPTH(cv);
329	}	374	}
330		375
331	PUTBACK;	376	PUTBACK;
332	}	377	}
		378	assert (!PL_comppad || AvARRAY (PL_comppad));//D
333	}	379	}
334		380
335	static void	381	static void
336	save_state(pTHX_ Coro__State c, int flags)	382	save_perl (pTHX_ Coro__State c)
337	{	383	{
		384	assert (!PL_comppad || AvARRAY (PL_comppad));//D
338	{	385	{
339	dSP;	386	dSP;
340	I32 cxix = cxstack_ix;	387	I32 cxix = cxstack_ix;
341	PERL_CONTEXT *ccstk = cxstack;	388	PERL_CONTEXT *ccstk = cxstack;
342	PERL_SI *top_si = PL_curstackinfo;	389	PERL_SI *top_si = PL_curstackinfo;
…		…
344	/*	391	/*
345	* the worst thing you can imagine happens first - we have to save	392	* the worst thing you can imagine happens first - we have to save
346	* (and reinitialize) all cv's in the whole callchain :(	393	* (and reinitialize) all cv's in the whole callchain :(
347	*/	394	*/
348		395
		396	EXTEND (SP, 3 + 1);
349	PUSHs (Nullsv);	397	PUSHs (Nullsv);
350	/* this loop was inspired by pp_caller */	398	/* this loop was inspired by pp_caller */
351	for (;;)	399	for (;;)
352	{	400	{
353	while (cxix >= 0)	401	while (cxix >= 0)
354	{	402	{
355	PERL_CONTEXT *cx = &ccstk[cxix--];	403	PERL_CONTEXT *cx = &ccstk[cxix--];
356		404
357	if (CxTYPE(cx) == CXt_SUB)	405	if (CxTYPE (cx) == CXt_SUB)
358	{	406	{
359	CV *cv = cx->blk_sub.cv;	407	CV *cv = cx->blk_sub.cv;
		408
360	if (CvDEPTH(cv))	409	if (CvDEPTH (cv))
361	{	410	{
362	EXTEND (SP, CvDEPTH(cv)*2);	411	EXTEND (SP, 3);
363
364	while (--CvDEPTH(cv))
365	{
366	/* this tells the restore code to increment CvDEPTH */
367	PUSHs (Nullsv);
368	PUSHs ((SV *)cv);
369	}
370
371	PUSHs ((SV *)CvPADLIST(cv));	412	PUSHs ((SV *)CvPADLIST (cv));
		413	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
372	PUSHs ((SV *)cv);	414	PUSHs ((SV *)cv);
373		415
		416	CvDEPTH (cv) = 0;
374	get_padlist (aTHX_ cv);	417	get_padlist (aTHX_ cv);
375	}	418	}
376	}	419	}
377	#ifdef CXt_FORMAT
378	else if (CxTYPE(cx) == CXt_FORMAT)
379	{
380	/* I never used formats, so how should I know how these are implemented? */
381	/* my bold guess is as a simple, plain sub... */
382	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
383	}
384	#endif
385	}	420	}
386		421
387	if (top_si->si_type == PERLSI_MAIN)	422	if (top_si->si_type == PERLSI_MAIN)
388	break;	423	break;
389		424
…		…
393	}	428	}
394		429
395	PUTBACK;	430	PUTBACK;
396	}	431	}
397		432
398	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	433	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
399	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	434	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
400	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	435	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		436	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		437	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
401		438
402	c->dowarn = PL_dowarn;	439	#define VAR(name,type)c->name = PL_ ## name;
403	c->in_eval = PL_in_eval;	440	# include "state.h"
404		441	#undef VAR
405	c->curstackinfo = PL_curstackinfo;
406	c->curstack = PL_curstack;
407	c->mainstack = PL_mainstack;
408	c->stack_sp = PL_stack_sp;
409	c->op = PL_op;
410	c->curpad = PL_curpad;
411	c->comppad = PL_comppad;
412	c->compcv = PL_compcv;
413	c->stack_base = PL_stack_base;
414	c->stack_max = PL_stack_max;
415	c->tmps_stack = PL_tmps_stack;
416	c->tmps_floor = PL_tmps_floor;
417	c->tmps_ix = PL_tmps_ix;
418	c->tmps_max = PL_tmps_max;
419	c->markstack = PL_markstack;
420	c->markstack_ptr = PL_markstack_ptr;
421	c->markstack_max = PL_markstack_max;
422	c->scopestack = PL_scopestack;
423	c->scopestack_ix = PL_scopestack_ix;
424	c->scopestack_max = PL_scopestack_max;
425	c->savestack = PL_savestack;
426	c->savestack_ix = PL_savestack_ix;
427	c->savestack_max = PL_savestack_max;
428	#if PERL_VERSION < 9
429	c->retstack = PL_retstack;
430	c->retstack_ix = PL_retstack_ix;
431	c->retstack_max = PL_retstack_max;
432	#endif
433	c->curpm = PL_curpm;
434	c->curcop = PL_curcop;
435	}	442	}
436		443
437	/*	444	/*
438	* allocate various perl stacks. This is an exact copy	445	* allocate various perl stacks. This is an exact copy
439	* of perl.c:init_stacks, except that it uses less memory	446	* of perl.c:init_stacks, except that it uses less memory
440	* on the (sometimes correct) assumption that coroutines do	447	* on the (sometimes correct) assumption that coroutines do
441	* not usually need a lot of stackspace.	448	* not usually need a lot of stackspace.
442	*/	449	*/
		450	#if CORO_PREFER_PERL_FUNCTIONS
		451	# define coro_init_stacks init_stacks
		452	#else
443	static void	453	static void
444	coro_init_stacks (pTHX)	454	coro_init_stacks (pTHX)
445	{	455	{
446	LOCK;
447
448	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	456	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
449	PL_curstackinfo->si_type = PERLSI_MAIN;	457	PL_curstackinfo->si_type = PERLSI_MAIN;
450	PL_curstack = PL_curstackinfo->si_stack;	458	PL_curstack = PL_curstackinfo->si_stack;
451	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	459	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
452		460
453	PL_stack_base = AvARRAY(PL_curstack);	461	PL_stack_base = AvARRAY(PL_curstack);
454	PL_stack_sp = PL_stack_base;	462	PL_stack_sp = PL_stack_base;
455	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	463	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
456		464
457	New(50,PL_tmps_stack,96,SV*);	465	New(50,PL_tmps_stack,128,SV*);
458	PL_tmps_floor = -1;	466	PL_tmps_floor = -1;
459	PL_tmps_ix = -1;	467	PL_tmps_ix = -1;
460	PL_tmps_max = 96;	468	PL_tmps_max = 128;
461		469
462	New(54,PL_markstack,16,I32);	470	New(54,PL_markstack,32,I32);
463	PL_markstack_ptr = PL_markstack;	471	PL_markstack_ptr = PL_markstack;
464	PL_markstack_max = PL_markstack + 16;	472	PL_markstack_max = PL_markstack + 32;
465		473
466	#ifdef SET_MARK_OFFSET	474	#ifdef SET_MARK_OFFSET
467	SET_MARK_OFFSET;	475	SET_MARK_OFFSET;
468	#endif	476	#endif
469		477
470	New(54,PL_scopestack,16,I32);	478	New(54,PL_scopestack,32,I32);
471	PL_scopestack_ix = 0;	479	PL_scopestack_ix = 0;
472	PL_scopestack_max = 16;	480	PL_scopestack_max = 32;
473		481
474	New(54,PL_savestack,96,ANY);	482	New(54,PL_savestack,64,ANY);
475	PL_savestack_ix = 0;	483	PL_savestack_ix = 0;
476	PL_savestack_max = 96;	484	PL_savestack_max = 64;
477		485
478	#if PERL_VERSION < 9	486	#if !PERL_VERSION_ATLEAST (5,9,0)
479	New(54,PL_retstack,8,OP*);	487	New(54,PL_retstack,16,OP*);
480	PL_retstack_ix = 0;	488	PL_retstack_ix = 0;
481	PL_retstack_max = 8;	489	PL_retstack_max = 16;
482	#endif	490	#endif
483
484	UNLOCK;
485	}	491	}
		492	#endif
486		493
487	/*	494	/*
488	* destroy the stacks, the callchain etc...	495	* destroy the stacks, the callchain etc...
489	*/	496	*/
490	static void	497	static void
491	destroy_stacks(pTHX)	498	coro_destroy_stacks (pTHX)
492	{	499	{
493	if (!IN_DESTRUCT)	500	if (!IN_DESTRUCT)
494	{	501	{
495	/* is this ugly, I ask? */	502	/* restore all saved variables and stuff */
496	LEAVE_SCOPE (0);	503	LEAVE_SCOPE (0);
		504	assert (PL_tmps_floor == -1);
497		505
498	/* sure it is, but more important: is it correct?? :/ */	506	/* free all temporaries */
499	FREETMPS;	507	FREETMPS;
		508	assert (PL_tmps_ix == -1);
500		509
		510	/* unwind all extra stacks */
501	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	511	POPSTACK_TO (PL_mainstack);
		512
		513	/* unwind main stack */
		514	dounwind (-1);
502	}	515	}
503		516
504	while (PL_curstackinfo->si_next)	517	while (PL_curstackinfo->si_next)
505	PL_curstackinfo = PL_curstackinfo->si_next;	518	PL_curstackinfo = PL_curstackinfo->si_next;
506		519
507	while (PL_curstackinfo)	520	while (PL_curstackinfo)
508	{	521	{
509	PERL_SI *p = PL_curstackinfo->si_prev;	522	PERL_SI *p = PL_curstackinfo->si_prev;
510		523
511	{ /*D*//*remove*/
512	dSP;
513	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
514	PUTBACK; /* possibly superfluous */
515	}
516
517	if (!IN_DESTRUCT)	524	if (!IN_DESTRUCT)
518	{
519	dounwind (-1);/*D*//*remove*/
520	SvREFCNT_dec (PL_curstackinfo->si_stack);	525	SvREFCNT_dec (PL_curstackinfo->si_stack);
521	}
522		526
523	Safefree (PL_curstackinfo->si_cxstack);	527	Safefree (PL_curstackinfo->si_cxstack);
524	Safefree (PL_curstackinfo);	528	Safefree (PL_curstackinfo);
525	PL_curstackinfo = p;	529	PL_curstackinfo = p;
526	}	530	}
527		531
528	Safefree (PL_tmps_stack);	532	Safefree (PL_tmps_stack);
529	Safefree (PL_markstack);	533	Safefree (PL_markstack);
530	Safefree (PL_scopestack);	534	Safefree (PL_scopestack);
531	Safefree (PL_savestack);	535	Safefree (PL_savestack);
532	#if PERL_VERSION < 9	536	#if !PERL_VERSION_ATLEAST (5,9,0)
533	Safefree (PL_retstack);	537	Safefree (PL_retstack);
534	#endif	538	#endif
535	}	539	}
536		540
		541	/** coroutine stack handling ************************************************/
		542
537	static void	543	static void
538	setup_coro (struct coro *coro)	544	setup_coro (pTHX_ struct coro *coro)
539	{	545	{
540	/*	546	/*
541	* emulate part of the perl startup here.	547	* emulate part of the perl startup here.
542	*/	548	*/
543	dTHX;	549	coro_init_stacks (aTHX);
		550
		551	PL_curcop = &PL_compiling;
		552	PL_in_eval = EVAL_NULL;
		553	PL_comppad = 0;
		554	PL_curpm = 0;
		555	PL_localizing = 0;
		556	PL_dirty = 0;
		557	PL_restartop = 0;
		558
		559	{
		560	dSP;
		561	LOGOP myop;
		562
		563	SvREFCNT_dec (GvAV (PL_defgv));
		564	GvAV (PL_defgv) = coro->args; coro->args = 0;
		565
		566	Zero (&myop, 1, LOGOP);
		567	myop.op_next = Nullop;
		568	myop.op_flags = OPf_WANT_VOID;
		569
		570	PUSHMARK (SP);
		571	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		572	PUTBACK;
		573	PL_op = (OP *)&myop;
		574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		575	SPAGAIN;
		576	}
		577
		578	ENTER; /* necessary e.g. for dounwind */
		579	}
		580
		581	static void
		582	free_coro_mortal (pTHX)
		583	{
		584	if (coro_mortal)
		585	{
		586	SvREFCNT_dec (coro_mortal);
		587	coro_mortal = 0;
		588	}
		589	}
		590
		591	/* inject a fake call to Coro::State::_cctx_init into the execution */
		592	static void NOINLINE
		593	prepare_cctx (pTHX_ coro_cctx *cctx)
		594	{
544	dSP;	595	dSP;
545	UNOP myop;	596	LOGOP myop;
546	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
547		597
548	coro_init_stacks (aTHX);
549	/*PL_curcop = 0;*/
550	/*PL_in_eval = PL_in_eval;*/ /* inherit */
551	SvREFCNT_dec (GvAV (PL_defgv));
552	GvAV (PL_defgv) = coro->args; coro->args = 0;
553
554	SPAGAIN;
555
556	Zero (&myop, 1, UNOP);	598	Zero (&myop, 1, LOGOP);
557	myop.op_next = Nullop;	599	myop.op_next = PL_op;
558	myop.op_flags = OPf_WANT_VOID;	600	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
559		601
		602	PUSHMARK (SP);
		603	EXTEND (SP, 2);
		604	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		605	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		606	PUTBACK;
560	PL_op = (OP *)&myop;	607	PL_op = (OP *)&myop;
561
562	PUSHMARK(SP);
563	XPUSHs (sub_init);
564	PUTBACK;
565	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	608	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
566	SPAGAIN;	609	SPAGAIN;
567
568	ENTER; /* necessary e.g. for dounwind */
569	}
570
571	static void
572	free_coro_mortal ()
573	{
574	if (coro_mortal)
575	{
576	SvREFCNT_dec (coro_mortal);
577	coro_mortal = 0;
578	}
579	}	610	}
580		611
581	static void	612	static void
582	coro_run (void *arg)	613	coro_run (void *arg)
583	{	614	{
		615	dTHX;
		616
		617	/* coro_run is the alternative tail of transfer(), so unlock here. */
		618	UNLOCK;
		619
584	/*	620	/*
585	* this is a _very_ stripped down perl interpreter ;)	621	* this is a _very_ stripped down perl interpreter ;)
586	*/	622	*/
587	dTHX;
588	int ret;
589
590	UNLOCK;
591
592	PL_top_env = &PL_start_env;	623	PL_top_env = &PL_start_env;
593		624
594	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));	625	/* inject call to cctx_init */
595	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));	626	prepare_cctx (aTHX_ (coro_cctx *)arg);
596
597	/* continue at cctx_init, without entersub */
598	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
599		627
600	/* somebody will hit me for both perl_run and PL_restartop */	628	/* somebody will hit me for both perl_run and PL_restartop */
601	ret = perl_run (aTHX_ PERL_GET_CONTEXT);	629	PL_restartop = PL_op;
602	printf ("ret %d\n", ret);//D	630	perl_run (PL_curinterp);
603		631
604	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);	632	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
605	abort ();	633	abort ();
606	}	634	}
607		635
608	static coro_stack *	636	static coro_cctx *
609	stack_new ()	637	cctx_new ()
610	{	638	{
611	coro_stack *stack;	639	coro_cctx *cctx;
		640	void *stack_start;
		641	size_t stack_size;
612		642
		643	++cctx_count;
		644
613	New (0, stack, 1, coro_stack);	645	Newz (0, cctx, 1, coro_cctx);
614		646
615	#if HAVE_MMAP	647	#if HAVE_MMAP
616		648
617	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	649	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
618	/* mmap suppsedly does allocate-on-write for us */	650	/* mmap supposedly does allocate-on-write for us */
619	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	651	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
620		652
621	if (stack->sptr == (void *)-1)	653	if (cctx->sptr != (void *)-1)
622	{
623	perror ("FATAL: unable to mmap stack for coroutine");
624	_exit (EXIT_FAILURE);
625	}	654	{
626
627	# if STACKGUARD	655	# if CORO_STACKGUARD
628	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	656	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
629	# endif	657	# endif
630		658	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
631	#else	659	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
632		660	cctx->mapped = 1;
633	stack->ssize = STACKSIZE * (long)sizeof (long);
634	New (0, stack->sptr, STACKSIZE, long);
635
636	if (!stack->sptr)
637	{	661	}
		662	else
		663	#endif
		664	{
		665	cctx->ssize = coro_stacksize * (long)sizeof (long);
		666	New (0, cctx->sptr, coro_stacksize, long);
		667
		668	if (!cctx->sptr)
		669	{
638	perror (stderr, "FATAL: unable to malloc stack for coroutine");	670	perror ("FATAL: unable to allocate stack for coroutine");
639	_exit (EXIT_FAILURE);	671	_exit (EXIT_FAILURE);
640	}	672	}
641		673
642	#endif	674	stack_start = cctx->sptr;
		675	stack_size = cctx->ssize;
		676	}
643		677
		678	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
644	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	679	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
645		680
646	return stack;	681	return cctx;
647	}	682	}
648		683
649	static void	684	static void
650	stack_free (coro_stack *stack)	685	cctx_destroy (coro_cctx *cctx)
651	{	686	{
652	if (!stack || stack == main_stack)	687	if (!cctx)
653	return;	688	return;
654		689
		690	--cctx_count;
		691
		692	#if CORO_USE_VALGRIND
		693	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		694	#endif
		695
655	#if HAVE_MMAP	696	#if HAVE_MMAP
		697	if (cctx->mapped)
656	munmap (stack->sptr, stack->ssize);	698	munmap (cctx->sptr, cctx->ssize);
657	#else
658	Safefree (stack->sptr);
659	#endif
660
661	Safefree (stack);
662	}
663
664	static coro_stack *stack_first;
665
666	static coro_stack *
667	stack_get ()
668	{
669	coro_stack *stack;
670
671	if (stack_first)
672	{
673	stack = stack_first;
674	stack_first = stack->next;
675	}
676	else	699	else
		700	#endif
		701	Safefree (cctx->sptr);
		702
		703	Safefree (cctx);
		704	}
		705
		706	static coro_cctx *
		707	cctx_get (pTHX)
		708	{
		709	while (cctx_first)
677	{	710	{
678	stack = stack_new ();	711	coro_cctx *cctx = cctx_first;
		712	cctx_first = cctx->next;
		713	--cctx_idle;
		714
		715	if (cctx->ssize >= coro_stacksize)
		716	return cctx;
		717
		718	cctx_destroy (cctx);
		719	}
		720
679	PL_op = PL_op->op_next;	721	PL_op = PL_op->op_next;
		722	return cctx_new ();
		723	}
		724
		725	static void
		726	cctx_put (coro_cctx *cctx)
		727	{
		728	/* free another cctx if overlimit */
		729	if (cctx_idle >= MAX_IDLE_CCTX)
		730	{
		731	coro_cctx *first = cctx_first;
		732	cctx_first = first->next;
		733	--cctx_idle;
		734
		735	assert (!first->inuse);
		736	cctx_destroy (first);
680	}	737	}
681		738
682	return stack;	739	++cctx_idle;
		740	cctx->next = cctx_first;
		741	cctx_first = cctx;
683	}	742	}
684		743
685	static void	744	/** coroutine switching *****************************************************/
686	stack_put (coro_stack *stack)
687	{
688	stack->next = stack_first;
689	stack_first = stack;
690	}
691		745
692	/* never call directly, always through the coro_state_transfer global variable */	746	/* never call directly, always through the coro_state_transfer global variable */
693	static void	747	static void NOINLINE
694	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	748	transfer (pTHX_ struct coro *prev, struct coro *next)
695	{	749	{
696	dSTACKLEVEL;	750	dSTACKLEVEL;
697		751
698	/* sometimes transfer is only called to set idle_sp */	752	/* sometimes transfer is only called to set idle_sp */
699	if (flags == TRANSFER_SET_STACKLEVEL)	753	if (!next)
		754	{
700	((coro_stack *)prev)->idle_sp = STACKLEVEL;	755	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		756	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		757	}
701	else if (prev != next)	758	else if (prev != next)
702	{	759	{
703	coro_stack *prev__stack;	760	coro_cctx *prev__cctx;
		761
		762	if (prev->flags & CF_NEW)
		763	{
		764	/* create a new empty context */
		765	Newz (0, prev->cctx, 1, coro_cctx);
		766	prev->cctx->inuse = 1;
		767	prev->flags &= ~CF_NEW;
		768	prev->flags |= CF_RUNNING;
		769	}
		770
		771	/*TODO: must not croak here */
		772	if (!prev->flags & CF_RUNNING)
		773	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		774
		775	if (next->flags & CF_RUNNING)
		776	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		777
		778	if (next->flags & CF_DESTROYED)
		779	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		780
		781	prev->flags &= ~CF_RUNNING;
		782	next->flags |= CF_RUNNING;
704		783
705	LOCK;	784	LOCK;
706		785
707	if (next->mainstack)	786	if (next->flags & CF_NEW)
708	{	787	{
709	/* coroutine already started */	788	/* need to start coroutine */
710	SAVE (prev, flags);	789	next->flags &= ~CF_NEW;
711	LOAD (next);	790	/* first get rid of the old state */
		791	save_perl (aTHX_ prev);
		792	/* setup coroutine call */
		793	setup_coro (aTHX_ next);
		794	/* need a new stack */
		795	assert (!next->cctx);
712	}	796	}
713	else	797	else
714	{	798	{
715	/* need to start coroutine */	799	/* coroutine already started */
716	/* first get rid of the old state */	800	save_perl (aTHX_ prev);
717	SAVE (prev, -1);	801	load_perl (aTHX_ next);
718	/* setup coroutine call */
719	setup_coro (next);
720	/* need a stack */
721	next->stack = 0;
722	}	802	}
723		803
724	prev__stack = prev->stack;	804	prev__cctx = prev->cctx;
725		805
726	/* possibly "free" the stack */	806	/* possibly "free" the cctx */
727	if (prev__stack->idle_sp == STACKLEVEL)	807	if (prev__cctx->idle_sp == STACKLEVEL)
728	{	808	{
729	stack_put (prev__stack);	809	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		810	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		811
730	prev->stack = 0;	812	prev->cctx = 0;
		813
		814	cctx_put (prev__cctx);
		815	prev__cctx->inuse = 0;
731	}	816	}
732		817
733	if (!next->stack)	818	if (!next->cctx)
734	next->stack = stack_get ();
735
736	if (prev__stack != next->stack)
737	{	819	{
738	prev__stack->top_env = PL_top_env;	820	next->cctx = cctx_get (aTHX);
739	PL_top_env = next->stack->top_env;	821	assert (!next->cctx->inuse);
740	printf ("stacksw %p %p\n", prev__stack->idle_sp, next->stack->idle_sp);//D	822	next->cctx->inuse = 1;
741	coro_transfer (&prev__stack->cctx, &next->stack->cctx);
742	}	823	}
743		824
		825	if (prev__cctx != next->cctx)
		826	{
		827	prev__cctx->top_env = PL_top_env;
		828	PL_top_env = next->cctx->top_env;
		829	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		830	}
		831
744	free_coro_mortal ();	832	free_coro_mortal (aTHX);
745
746	UNLOCK;	833	UNLOCK;
747	}	834	}
748	}	835	}
749		836
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	837	struct transfer_args
756	{	838	{
757	struct coro *prev, *next;	839	struct coro *prev, *next;
758	int flags;
759	};	840	};
760		841
761	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	842	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
762		843
		844	/** high level stuff ********************************************************/
		845
763	static void	846	static int
764	coro_state_destroy (struct coro *coro)	847	coro_state_destroy (pTHX_ struct coro *coro)
765	{	848	{
766	if (coro->refcnt--)	849	if (coro->flags & CF_DESTROYED)
767	return;	850	return 0;
		851
		852	coro->flags |= CF_DESTROYED;
		853
		854	if (coro->flags & CF_READY)
		855	{
		856	/* reduce nready, as destroying a ready coro effectively unreadies it */
		857	/* alternative: look through all ready queues and remove the coro */
		858	LOCK;
		859	--coro_nready;
		860	UNLOCK;
		861	}
		862	else
		863	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
768		864
769	if (coro->mainstack && coro->mainstack != main_mainstack)	865	if (coro->mainstack && coro->mainstack != main_mainstack)
770	{	866	{
771	struct coro temp;	867	struct coro temp;
772		868
773	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	869	assert (!(coro->flags & CF_RUNNING));
		870
		871	Zero (&temp, 1, struct coro);
		872	temp.save = CORO_SAVE_DEF;
		873
		874	if (coro->flags & CF_RUNNING)
		875	croak ("FATAL: tried to destroy currently running coroutine");
		876
		877	save_perl (aTHX_ &temp);
774	LOAD (aTHX_ coro);	878	load_perl (aTHX_ coro);
775		879
776	destroy_stacks (aTHX);	880	coro_destroy_stacks (aTHX);
777		881
778	LOAD ((&temp)); /* this will get rid of defsv etc.. */	882	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
779		883
780	coro->mainstack = 0;	884	coro->mainstack = 0;
781	}	885	}
782		886
783	stack_free (coro->stack);	887	cctx_destroy (coro->cctx);
784	SvREFCNT_dec (coro->args);	888	SvREFCNT_dec (coro->args);
785	Safefree (coro);	889
		890	return 1;
786	}	891	}
787		892
788	static int	893	static int
789	coro_state_clear (SV *sv, MAGIC *mg)	894	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
790	{	895	{
791	struct coro *coro = (struct coro *)mg->mg_ptr;	896	struct coro *coro = (struct coro *)mg->mg_ptr;
792	mg->mg_ptr = 0;	897	mg->mg_ptr = 0;
793		898
		899	if (--coro->refcnt < 0)
		900	{
794	coro_state_destroy (coro);	901	coro_state_destroy (aTHX_ coro);
		902	Safefree (coro);
		903	}
795		904
796	return 0;	905	return 0;
797	}	906	}
798		907
799	static int	908	static int
800	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	909	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
801	{	910	{
802	struct coro *coro = (struct coro *)mg->mg_ptr;	911	struct coro *coro = (struct coro *)mg->mg_ptr;
803		912
804	++coro->refcnt;	913	++coro->refcnt;
805		914
806	return 0;	915	return 0;
807	}	916	}
808		917
809	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	918	static MGVTBL coro_state_vtbl = {
		919	0, 0, 0, 0,
		920	coro_state_free,
		921	0,
		922	#ifdef MGf_DUP
		923	coro_state_dup,
		924	#else
		925	# define MGf_DUP 0
		926	#endif
		927	};
810		928
811	static struct coro *	929	static struct coro *
812	SvSTATE (SV *coro)	930	SvSTATE_ (pTHX_ SV *coro)
813	{	931	{
814	HV *stash;	932	HV *stash;
815	MAGIC *mg;	933	MAGIC *mg;
816		934
817	if (SvROK (coro))	935	if (SvROK (coro))
…		…
823	/* very slow, but rare, check */	941	/* very slow, but rare, check */
824	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	942	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
825	croak ("Coro::State object required");	943	croak ("Coro::State object required");
826	}	944	}
827		945
828	mg = SvMAGIC (coro);	946	mg = CORO_MAGIC (coro);
829	assert (mg->mg_type == PERL_MAGIC_ext);
830	return (struct coro *)mg->mg_ptr;	947	return (struct coro *)mg->mg_ptr;
831	}	948	}
832		949
		950	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		951
833	static void	952	static void
834	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	953	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
835	{	954	{
836	ta->prev = SvSTATE (prev);	955	ta->prev = SvSTATE (prev_sv);
837	ta->next = SvSTATE (next);	956	ta->next = SvSTATE (next_sv);
838	ta->flags = flags;
839	}	957	}
840		958
841	static void	959	static void
842	api_transfer (SV *prev, SV *next, int flags)	960	api_transfer (SV *prev_sv, SV *next_sv)
843	{	961	{
844	dTHX;	962	dTHX;
845	struct transfer_args ta;	963	struct transfer_args ta;
846		964
847	prepare_transfer (aTHX_ &ta, prev, next, flags);	965	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
848	TRANSFER (ta);	966	TRANSFER (ta);
849	}	967	}
850		968
		969	static int
		970	api_save (SV *coro_sv, int new_save)
		971	{
		972	dTHX;
		973	struct coro *coro = SvSTATE (coro_sv);
		974	int old_save = coro->save;
		975
		976	if (new_save >= 0)
		977	coro->save = new_save;
		978
		979	return old_save;
		980	}
		981
851	/** Coro ********************************************************************/	982	/** Coro ********************************************************************/
852		983
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	984	static void
866	coro_enq (pTHX_ SV *sv)	985	coro_enq (pTHX_ SV *coro_sv)
867	{	986	{
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);	987	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
876	coro_nready++;
877	}	988	}
878		989
879	static SV *	990	static SV *
880	coro_deq (pTHX_ int min_prio)	991	coro_deq (pTHX_ int min_prio)
881	{	992	{
…		…
885	if (min_prio < 0)	996	if (min_prio < 0)
886	min_prio = 0;	997	min_prio = 0;
887		998
888	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	999	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
889	if (AvFILLp (coro_ready [prio]) >= 0)	1000	if (AvFILLp (coro_ready [prio]) >= 0)
890	{
891	coro_nready--;
892	return av_shift (coro_ready [prio]);	1001	return av_shift (coro_ready [prio]);
893	}
894		1002
895	return 0;	1003	return 0;
896	}	1004	}
897		1005
898	static void	1006	static int
899	api_ready (SV *coro)	1007	api_ready (SV *coro_sv)
900	{	1008	{
901	dTHX;	1009	dTHX;
		1010	struct coro *coro;
902		1011
903	if (SvROK (coro))	1012	if (SvROK (coro_sv))
904	coro = SvRV (coro);	1013	coro_sv = SvRV (coro_sv);
		1014
		1015	coro = SvSTATE (coro_sv);
		1016
		1017	if (coro->flags & CF_READY)
		1018	return 0;
		1019
		1020	coro->flags |= CF_READY;
905		1021
906	LOCK;	1022	LOCK;
907	coro_enq (aTHX_ SvREFCNT_inc (coro));	1023	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1024	++coro_nready;
908	UNLOCK;	1025	UNLOCK;
909	}
910		1026
		1027	return 1;
		1028	}
		1029
911	static void	1030	static int
		1031	api_is_ready (SV *coro_sv)
		1032	{
		1033	dTHX;
		1034	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1035	}
		1036
		1037	static void
912	prepare_schedule (aTHX_ struct transfer_args *ta)	1038	prepare_schedule (pTHX_ struct transfer_args *ta)
913	{	1039	{
914	SV *current, *prev, *next;	1040	SV *prev_sv, *next_sv;
		1041
		1042	for (;;)
		1043	{
		1044	LOCK;
		1045	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1046
		1047	/* nothing to schedule: call the idle handler */
		1048	if (!next_sv)
		1049	{
		1050	dSP;
		1051	UNLOCK;
		1052
		1053	ENTER;
		1054	SAVETMPS;
		1055
		1056	PUSHMARK (SP);
		1057	PUTBACK;
		1058	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1059
		1060	FREETMPS;
		1061	LEAVE;
		1062	continue;
		1063	}
		1064
		1065	ta->next = SvSTATE (next_sv);
		1066
		1067	/* cannot transfer to destroyed coros, skip and look for next */
		1068	if (ta->next->flags & CF_DESTROYED)
		1069	{
		1070	UNLOCK;
		1071	SvREFCNT_dec (next_sv);
		1072	/* coro_nready is already taken care of by destroy */
		1073	continue;
		1074	}
		1075
		1076	--coro_nready;
		1077	UNLOCK;
		1078	break;
		1079	}
		1080
		1081	/* free this only after the transfer */
		1082	prev_sv = SvRV (coro_current);
		1083	SvRV_set (coro_current, next_sv);
		1084	ta->prev = SvSTATE (prev_sv);
		1085
		1086	assert (ta->next->flags & CF_READY);
		1087	ta->next->flags &= ~CF_READY;
915		1088
916	LOCK;	1089	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 ();	1090	free_coro_mortal (aTHX);
951	coro_mortal = prev;	1091	coro_mortal = prev_sv;
952
953	ta->prev = SvSTATE (prev);
954	ta->next = SvSTATE (next);
955	ta->flags = TRANSFER_SAVE_ALL;
956
957	UNLOCK;	1092	UNLOCK;
958	}	1093	}
959		1094
960	static void	1095	static void
961	prepare_cede (aTHX_ struct transfer_args *ta)	1096	prepare_cede (pTHX_ struct transfer_args *ta)
962	{	1097	{
963	LOCK;	1098	api_ready (coro_current);
964	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
965	UNLOCK;
966
967	prepare_schedule (ta);	1099	prepare_schedule (aTHX_ ta);
		1100	}
		1101
		1102	static int
		1103	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1104	{
		1105	if (coro_nready)
		1106	{
		1107	SV *prev = SvRV (coro_current);
		1108	prepare_schedule (aTHX_ ta);
		1109	api_ready (prev);
		1110	return 1;
		1111	}
		1112	else
		1113	return 0;
968	}	1114	}
969		1115
970	static void	1116	static void
971	api_schedule (void)	1117	api_schedule (void)
972	{	1118	{
973	dTHX;	1119	dTHX;
974	struct transfer_args ta;	1120	struct transfer_args ta;
975		1121
976	prepare_schedule (&ta);	1122	prepare_schedule (aTHX_ &ta);
977	TRANSFER (ta);	1123	TRANSFER (ta);
978	}	1124	}
979		1125
980	static void	1126	static int
981	api_cede (void)	1127	api_cede (void)
982	{	1128	{
983	dTHX;	1129	dTHX;
984	struct transfer_args ta;	1130	struct transfer_args ta;
985		1131
986	prepare_cede (&ta);	1132	prepare_cede (aTHX_ &ta);
		1133
		1134	if (ta.prev != ta.next)
		1135	{
987	TRANSFER (ta);	1136	TRANSFER (ta);
		1137	return 1;
		1138	}
		1139	else
		1140	return 0;
		1141	}
		1142
		1143	static int
		1144	api_cede_notself (void)
		1145	{
		1146	dTHX;
		1147	struct transfer_args ta;
		1148
		1149	if (prepare_cede_notself (aTHX_ &ta))
		1150	{
		1151	TRANSFER (ta);
		1152	return 1;
		1153	}
		1154	else
		1155	return 0;
988	}	1156	}
989		1157
990	MODULE = Coro::State PACKAGE = Coro::State	1158	MODULE = Coro::State PACKAGE = Coro::State
991		1159
992	PROTOTYPES: DISABLE	1160	PROTOTYPES: DISABLE
…		…
998	#endif	1166	#endif
999	BOOT_PAGESIZE;	1167	BOOT_PAGESIZE;
1000		1168
1001	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1169	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1002		1170
1003	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1171	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1004	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1172	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1005	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1173	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1174	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1175	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1176	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1177	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1006		1178
1007	main_mainstack = PL_mainstack;	1179	main_mainstack = PL_mainstack;
1008		1180
1009	coroapi.ver = CORO_API_VERSION;	1181	coroapi.ver = CORO_API_VERSION;
1010	coroapi.transfer = api_transfer;	1182	coroapi.transfer = api_transfer;
1011
1012	Newz (0, main_stack, 1, coro_stack);
1013	main_stack->idle_sp = (void *)-1;
1014		1183
1015	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1184	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1016	}	1185	}
1017		1186
1018	SV *	1187	SV *
…		…
1023	HV *hv;	1192	HV *hv;
1024	int i;	1193	int i;
1025		1194
1026	Newz (0, coro, 1, struct coro);	1195	Newz (0, coro, 1, struct coro);
1027	coro->args = newAV ();	1196	coro->args = newAV ();
		1197	coro->save = CORO_SAVE_DEF;
		1198	coro->flags = CF_NEW;
1028		1199
1029	hv = newHV ();	1200	hv = newHV ();
1030	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1201	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1031	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1202	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1032		1203
1033	for (i = 1; i < items; i++)	1204	for (i = 1; i < items; i++)
1034	av_push (coro->args, newSVsv (ST (i)));	1205	av_push (coro->args, newSVsv (ST (i)));
1035
1036	coro->stack = main_stack;
1037	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1038	/*coro->stack = 0;*/
1039	}	1206	}
1040	OUTPUT:	1207	OUTPUT:
		1208	RETVAL
		1209
		1210	int
		1211	save (SV *coro, int new_save = -1)
		1212	CODE:
		1213	RETVAL = api_save (coro, new_save);
		1214	OUTPUT:
		1215	RETVAL
		1216
		1217	int
		1218	save_also (SV *coro_sv, int save_also)
		1219	CODE:
		1220	{
		1221	struct coro *coro = SvSTATE (coro_sv);
		1222	RETVAL = coro->save;
		1223	coro->save |= save_also;
		1224	}
		1225	OUTPUT:
1041	RETVAL	1226	RETVAL
1042		1227
1043	void	1228	void
1044	_set_stacklevel (...)	1229	_set_stacklevel (...)
1045	ALIAS:	1230	ALIAS:
1046	Coro::State::transfer = 1	1231	Coro::State::transfer = 1
1047	Coro::schedule = 2	1232	Coro::schedule = 2
1048	Coro::cede = 3	1233	Coro::cede = 3
1049	Coro::Cont::yield = 4	1234	Coro::cede_notself = 4
1050	CODE:	1235	CODE:
1051	{	1236	{
1052	struct transfer_args ta;	1237	struct transfer_args ta;
1053		1238
1054	switch (ix)	1239	switch (ix)
1055	{	1240	{
1056	case 0:	1241	case 0:
1057	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1242	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1058	ta.next = 0;	1243	ta.next = 0;
1059	ta.flags = TRANSFER_SET_STACKLEVEL;
1060	break;	1244	break;
1061		1245
1062	case 1:	1246	case 1:
1063	if (items != 3)	1247	if (items != 2)
1064	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1248	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1065		1249
1066	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1250	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1067	break;	1251	break;
1068		1252
1069	case 2:	1253	case 2:
1070	prepare_schedule (&ta);	1254	prepare_schedule (aTHX_ &ta);
1071	break;	1255	break;
1072		1256
1073	case 3:	1257	case 3:
1074	prepare_cede (&ta);	1258	prepare_cede (aTHX_ &ta);
1075	break;	1259	break;
1076		1260
1077	case 4:	1261	case 4:
1078	{	1262	if (!prepare_cede_notself (aTHX_ &ta))
1079	SV *yieldstack;	1263	XSRETURN_EMPTY;
1080	SV *sv;
1081	AV *defav = GvAV (PL_defgv);
1082		1264
1083	yieldstack = *hv_fetch (
1084	(HV *)SvRV (GvSV (coro_current)),
1085	"yieldstack", sizeof ("yieldstack") - 1,
1086	0
1087	);
1088
1089	/* set up @_ -- ugly */
1090	av_clear (defav);
1091	av_fill (defav, items - 1);
1092	while (items--)
1093	av_store (defav, items, SvREFCNT_inc (ST(items)));
1094
1095	sv = av_pop ((AV *)SvRV (yieldstack));
1096	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1097	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1098	ta.flags = 0;
1099	SvREFCNT_dec (sv);
1100	}
1101	break;	1265	break;
1102
1103	}	1266	}
1104		1267
		1268	BARRIER;
1105	TRANSFER (ta);	1269	TRANSFER (ta);
1106	}
1107		1270
1108	void	1271	if (GIMME_V != G_VOID && ta.next != ta.prev)
1109	_clone_state_from (SV *dst, SV *src)	1272	XSRETURN_YES;
		1273	}
		1274
		1275	bool
		1276	_destroy (SV *coro_sv)
1110	CODE:	1277	CODE:
1111	{	1278	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1112	struct coro *coro_src = SvSTATE (src);	1279	OUTPUT:
1113		1280	RETVAL
1114	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1115
1116	++coro_src->refcnt;
1117	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1118	}
1119
1120	void
1121	_nonlocal_goto (IV nextop)
1122	CODE:
1123	/* uuh, somebody will kill me again for this */
1124	PL_op->op_next = INT2PTR (OP *, nextop);
1125		1281
1126	void	1282	void
1127	_exit (code)	1283	_exit (code)
1128	int code	1284	int code
1129	PROTOTYPE: $	1285	PROTOTYPE: $
1130	CODE:	1286	CODE:
1131	_exit (code);	1287	_exit (code);
1132		1288
		1289	int
		1290	cctx_stacksize (int new_stacksize = 0)
		1291	CODE:
		1292	RETVAL = coro_stacksize;
		1293	if (new_stacksize)
		1294	coro_stacksize = new_stacksize;
		1295	OUTPUT:
		1296	RETVAL
		1297
		1298	int
		1299	cctx_count ()
		1300	CODE:
		1301	RETVAL = cctx_count;
		1302	OUTPUT:
		1303	RETVAL
		1304
		1305	int
		1306	cctx_idle ()
		1307	CODE:
		1308	RETVAL = cctx_idle;
		1309	OUTPUT:
		1310	RETVAL
		1311
1133	MODULE = Coro::State PACKAGE = Coro	1312	MODULE = Coro::State PACKAGE = Coro
1134		1313
1135	BOOT:	1314	BOOT:
1136	{	1315	{
1137	int i;	1316	int i;
…		…
1143	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1322	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1144	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1323	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1145	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1324	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1146	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1325	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1147		1326
1148	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1327	coro_current = get_sv ("Coro::current", FALSE);
1149	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1328	SvREADONLY_on (coro_current);
1150		1329
1151	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1330	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1152	coro_ready[i] = newAV ();	1331	coro_ready[i] = newAV ();
1153		1332
1154	{	1333	{
1155	SV *sv = perl_get_sv("Coro::API", 1);	1334	SV *sv = perl_get_sv("Coro::API", 1);
1156		1335
1157	coroapi.schedule = api_schedule;	1336	coroapi.schedule = api_schedule;
		1337	coroapi.save = api_save;
1158	coroapi.cede = api_cede;	1338	coroapi.cede = api_cede;
		1339	coroapi.cede_notself = api_cede_notself;
1159	coroapi.ready = api_ready;	1340	coroapi.ready = api_ready;
		1341	coroapi.is_ready = api_is_ready;
1160	coroapi.nready = &coro_nready;	1342	coroapi.nready = &coro_nready;
1161	coroapi.current = coro_current;	1343	coroapi.current = coro_current;
1162		1344
1163	GCoroAPI = &coroapi;	1345	GCoroAPI = &coroapi;
1164	sv_setiv (sv, (IV)&coroapi);	1346	sv_setiv (sv, (IV)&coroapi);
1165	SvREADONLY_on (sv);	1347	SvREADONLY_on (sv);
1166	}	1348	}
1167	}	1349	}
		1350
		1351	void
		1352	_set_current (SV *current)
		1353	PROTOTYPE: $
		1354	CODE:
		1355	SvREFCNT_dec (SvRV (coro_current));
		1356	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1168		1357
1169	int	1358	int
1170	prio (Coro::State coro, int newprio = 0)	1359	prio (Coro::State coro, int newprio = 0)
1171	ALIAS:	1360	ALIAS:
1172	nice = 1	1361	nice = 1
…		…
1175	RETVAL = coro->prio;	1364	RETVAL = coro->prio;
1176		1365
1177	if (items > 1)	1366	if (items > 1)
1178	{	1367	{
1179	if (ix)	1368	if (ix)
1180	newprio += coro->prio;	1369	newprio = coro->prio - newprio;
1181		1370
1182	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1371	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1183	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1372	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1184		1373
1185	coro->prio = newprio;	1374	coro->prio = newprio;
1186	}	1375	}
1187	}	1376	}
		1377	OUTPUT:
		1378	RETVAL
1188		1379
1189	void	1380	SV *
1190	ready (SV *self)	1381	ready (SV *self)
1191	PROTOTYPE: $	1382	PROTOTYPE: $
1192	CODE:	1383	CODE:
1193	api_ready (self);	1384	RETVAL = boolSV (api_ready (self));
		1385	OUTPUT:
		1386	RETVAL
		1387
		1388	SV *
		1389	is_ready (SV *self)
		1390	PROTOTYPE: $
		1391	CODE:
		1392	RETVAL = boolSV (api_is_ready (self));
		1393	OUTPUT:
		1394	RETVAL
1194		1395
1195	int	1396	int
1196	nready (...)	1397	nready (...)
1197	PROTOTYPE:	1398	PROTOTYPE:
1198	CODE:	1399	CODE:
…		…
1204		1405
1205	SV *	1406	SV *
1206	_get_state ()	1407	_get_state ()
1207	CODE:	1408	CODE:
1208	{	1409	{
1209	struct {	1410	struct io_state *data;
1210	int errorno;
1211	int laststype;
1212	int laststatval;
1213	Stat_t statcache;
1214	} data;
1215		1411
		1412	RETVAL = newSV (sizeof (struct io_state));
		1413	data = (struct io_state *)SvPVX (RETVAL);
		1414	SvCUR_set (RETVAL, sizeof (struct io_state));
		1415	SvPOK_only (RETVAL);
		1416
1216	data.errorno = errno;	1417	data->errorno = errno;
1217	data.laststype = PL_laststype;	1418	data->laststype = PL_laststype;
1218	data.laststatval = PL_laststatval;	1419	data->laststatval = PL_laststatval;
1219	data.statcache = PL_statcache;	1420	data->statcache = PL_statcache;
1220
1221	RETVAL = newSVpvn ((char *)&data, sizeof data);
1222	}	1421	}
1223	OUTPUT:	1422	OUTPUT:
1224	RETVAL	1423	RETVAL
1225		1424
1226	void	1425	void
1227	_set_state (char *data_)	1426	_set_state (char *data_)
1228	PROTOTYPE: $	1427	PROTOTYPE: $
1229	CODE:	1428	CODE:
1230	{	1429	{
1231	struct {	1430	struct io_state *data = (void *)data_;
1232	int errorno;
1233	int laststype;
1234	int laststatval;
1235	Stat_t statcache;
1236	} *data = (void *)data_;
1237		1431
1238	errno = data->errorno;	1432	errno = data->errorno;
1239	PL_laststype = data->laststype;	1433	PL_laststype = data->laststype;
1240	PL_laststatval = data->laststatval;	1434	PL_laststatval = data->laststatval;
1241	PL_statcache = data->statcache;	1435	PL_statcache = data->statcache;
1242	}	1436	}
		1437

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