ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.97 by root, Sun Nov 26 21:21:14 2006 UTC vs.
Revision 1.151 by root, Wed Sep 19 21:39:15 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; /* sp of top-level transfer/schedule/cede call */	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;
		193
		194	/* linked list */
		195	struct coro *next, *prev;
		196	HV *hv; /* the perl hash associated with this coro, if any */
153	};	197	};
154		198
155	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
157		201
		202	/** Coro ********************************************************************/
		203
		204	#define PRIO_MAX 3
		205	#define PRIO_HIGH 1
		206	#define PRIO_NORMAL 0
		207	#define PRIO_LOW -1
		208	#define PRIO_IDLE -3
		209	#define PRIO_MIN -4
		210
		211	/* for Coro.pm */
		212	static SV *coro_current;
		213	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		214	static int coro_nready;
		215	static struct coro *first;
		216
		217	/** lowlevel stuff **********************************************************/
		218
158	static AV *	219	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	220	coro_clone_padlist (pTHX_ CV *cv)
160	{	221	{
161	AV *padlist = CvPADLIST (cv);	222	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	223	AV *newpadlist, *newpad;
163		224
164	newpadlist = newAV ();	225	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	226	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	227	#if PERL_VERSION_ATLEAST (5,9,0)
		228	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		229	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	230	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	231	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	232	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	233	--AvFILLp (padlist);
173		234
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	235	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
218		279
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	280	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		281
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		283
		284	#define CORO_MAGIC(cv) \
		285	SvMAGIC (cv) \
		286	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		287	? SvMAGIC (cv) \
		288	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		289	: 0
		290
223	/* the next two functions merely cache the padlists */	291	/* the next two functions merely cache the padlists */
224	static void	292	static void
225	get_padlist (pTHX_ CV *cv)	293	get_padlist (pTHX_ CV *cv)
226	{	294	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	295	MAGIC *mg = CORO_MAGIC (cv);
		296	AV *av;
228		297
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	300	else
232	{	301	{
233	#if 0	302	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this is probably cleaner, but also slower? */	303	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	304	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	305	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	306	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	307	SvREFCNT_dec (cp);
239	#else	308	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	312	}
244		313
245	static void	314	static void
246	put_padlist (pTHX_ CV *cv)	315	put_padlist (pTHX_ CV *cv)
247	{	316	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	317	MAGIC *mg = CORO_MAGIC (cv);
		318	AV *av;
249		319
250	if (!mg)	320	if (!mg)
251	{	321	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	322	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	323	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	324	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	325	mg->mg_obj = (SV *)newAV ();
256	}	326	}
257		327
258	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	328	av = (AV *)mg->mg_obj;
		329
		330	if (AvFILLp (av) >= AvMAX (av))
		331	av_extend (av, AvMAX (av) + 1);
		332
		333	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
259	}	334	}
		335
		336	/** load & save, init *******************************************************/
260		337
261	#define SB do {	338	#define SB do {
262	#define SE } while (0)	339	#define SE } while (0)
263		340
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	341	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
268		342
269	static void	343	static void
270	load_state(pTHX_ Coro__State c)	344	load_perl (pTHX_ Coro__State c)
271	{	345	{
272	PL_dowarn = c->dowarn;	346	#define VAR(name,type) PL_ ## name = c->name;
273	PL_in_eval = c->in_eval;	347	# include "state.h"
274		348	#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		349
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	352	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		353	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		354
		355	if (c->irssv)
		356	{
		357	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		358	{
		359	SvREFCNT_dec (c->irssv);
		360	c->irssv = 0;
		361	}
		362	else
		363	{
		364	REPLACE_SV (PL_rs, c->irssv);
		365	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		366	sv_setsv (c->irssv_sv, PL_rs);
		367	}
		368	}
309		369
310	{	370	{
311	dSP;	371	dSP;
312	CV *cv;	372	CV *cv;
313		373
314	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
316	{	376	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	378	CvDEPTH (cv) = PTR2IV (POPs);
323	}	379	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	380	}
327		381
328	PUTBACK;	382	PUTBACK;
329	}	383	}
330	}	384	}
331		385
332	static void	386	static void
333	save_state(pTHX_ Coro__State c, int flags)	387	save_perl (pTHX_ Coro__State c)
334	{	388	{
335	{	389	{
336	dSP;	390	dSP;
337	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
…		…
341	/*	395	/*
342	* the worst thing you can imagine happens first - we have to save	396	* the worst thing you can imagine happens first - we have to save
343	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
344	*/	398	*/
345		399
		400	EXTEND (SP, 3 + 1);
346	PUSHs (Nullsv);	401	PUSHs (Nullsv);
347	/* this loop was inspired by pp_caller */	402	/* this loop was inspired by pp_caller */
348	for (;;)	403	for (;;)
349	{	404	{
350	while (cxix >= 0)	405	while (cxix >= 0)
351	{	406	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	407	PERL_CONTEXT *cx = &ccstk[cxix--];
353		408
354	if (CxTYPE(cx) == CXt_SUB)	409	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
355	{	410	{
356	CV *cv = cx->blk_sub.cv;	411	CV *cv = cx->blk_sub.cv;
		412
357	if (CvDEPTH(cv))	413	if (CvDEPTH (cv))
358	{	414	{
359	EXTEND (SP, CvDEPTH(cv)*2);	415	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));	416	PUSHs ((SV *)CvPADLIST (cv));
		417	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	418	PUSHs ((SV *)cv);
370		419
		420	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	421	get_padlist (aTHX_ cv);
372	}	422	}
373	}	423	}
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	}	424	}
383		425
384	if (top_si->si_type == PERLSI_MAIN)	426	if (top_si->si_type == PERLSI_MAIN)
385	break;	427	break;
386		428
…		…
390	}	432	}
391		433
392	PUTBACK;	434	PUTBACK;
393	}	435	}
394		436
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	437	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;	438	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	439	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		440	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		441	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
398		442
399	c->dowarn = PL_dowarn;	443	#define VAR(name,type)c->name = PL_ ## name;
400	c->in_eval = PL_in_eval;	444	# include "state.h"
401		445	#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	}	446	}
433		447
434	/*	448	/*
435	* allocate various perl stacks. This is an exact copy	449	* allocate various perl stacks. This is an exact copy
436	* of perl.c:init_stacks, except that it uses less memory	450	* of perl.c:init_stacks, except that it uses less memory
437	* on the (sometimes correct) assumption that coroutines do	451	* on the (sometimes correct) assumption that coroutines do
438	* not usually need a lot of stackspace.	452	* not usually need a lot of stackspace.
439	*/	453	*/
		454	#if CORO_PREFER_PERL_FUNCTIONS
		455	# define coro_init_stacks init_stacks
		456	#else
440	static void	457	static void
441	coro_init_stacks (pTHX)	458	coro_init_stacks (pTHX)
442	{	459	{
443	LOCK;
444
445	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	460	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
446	PL_curstackinfo->si_type = PERLSI_MAIN;	461	PL_curstackinfo->si_type = PERLSI_MAIN;
447	PL_curstack = PL_curstackinfo->si_stack;	462	PL_curstack = PL_curstackinfo->si_stack;
448	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	463	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
449		464
450	PL_stack_base = AvARRAY(PL_curstack);	465	PL_stack_base = AvARRAY(PL_curstack);
451	PL_stack_sp = PL_stack_base;	466	PL_stack_sp = PL_stack_base;
452	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	467	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
453		468
454	New(50,PL_tmps_stack,96,SV*);	469	New(50,PL_tmps_stack,128,SV*);
455	PL_tmps_floor = -1;	470	PL_tmps_floor = -1;
456	PL_tmps_ix = -1;	471	PL_tmps_ix = -1;
457	PL_tmps_max = 96;	472	PL_tmps_max = 128;
458		473
459	New(54,PL_markstack,16,I32);	474	New(54,PL_markstack,32,I32);
460	PL_markstack_ptr = PL_markstack;	475	PL_markstack_ptr = PL_markstack;
461	PL_markstack_max = PL_markstack + 16;	476	PL_markstack_max = PL_markstack + 32;
462		477
463	#ifdef SET_MARK_OFFSET	478	#ifdef SET_MARK_OFFSET
464	SET_MARK_OFFSET;	479	SET_MARK_OFFSET;
465	#endif	480	#endif
466		481
467	New(54,PL_scopestack,16,I32);	482	New(54,PL_scopestack,32,I32);
468	PL_scopestack_ix = 0;	483	PL_scopestack_ix = 0;
469	PL_scopestack_max = 16;	484	PL_scopestack_max = 32;
470		485
471	New(54,PL_savestack,96,ANY);	486	New(54,PL_savestack,64,ANY);
472	PL_savestack_ix = 0;	487	PL_savestack_ix = 0;
473	PL_savestack_max = 96;	488	PL_savestack_max = 64;
474		489
475	#if PERL_VERSION < 9	490	#if !PERL_VERSION_ATLEAST (5,9,0)
476	New(54,PL_retstack,8,OP*);	491	New(54,PL_retstack,16,OP*);
477	PL_retstack_ix = 0;	492	PL_retstack_ix = 0;
478	PL_retstack_max = 8;	493	PL_retstack_max = 16;
479	#endif	494	#endif
480
481	UNLOCK;
482	}	495	}
		496	#endif
483		497
484	/*	498	/*
485	* destroy the stacks, the callchain etc...	499	* destroy the stacks, the callchain etc...
486	*/	500	*/
487	static void	501	static void
488	destroy_stacks(pTHX)	502	coro_destroy_stacks (pTHX)
489	{	503	{
490	if (!IN_DESTRUCT)	504	if (!IN_DESTRUCT)
491	{	505	{
492	/* is this ugly, I ask? */	506	/* restore all saved variables and stuff */
493	LEAVE_SCOPE (0);	507	LEAVE_SCOPE (0);
		508	assert (PL_tmps_floor == -1);
494		509
495	/* sure it is, but more important: is it correct?? :/ */	510	/* free all temporaries */
496	FREETMPS;	511	FREETMPS;
		512	assert (PL_tmps_ix == -1);
497		513
		514	/* unwind all extra stacks */
498	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	515	POPSTACK_TO (PL_mainstack);
		516
		517	/* unwind main stack */
		518	dounwind (-1);
499	}	519	}
500		520
501	while (PL_curstackinfo->si_next)	521	while (PL_curstackinfo->si_next)
502	PL_curstackinfo = PL_curstackinfo->si_next;	522	PL_curstackinfo = PL_curstackinfo->si_next;
503		523
504	while (PL_curstackinfo)	524	while (PL_curstackinfo)
505	{	525	{
506	PERL_SI *p = PL_curstackinfo->si_prev;	526	PERL_SI *p = PL_curstackinfo->si_prev;
507		527
508	{ /*D*//*remove*/
509	dSP;
510	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
511	PUTBACK; /* possibly superfluous */
512	}
513
514	if (!IN_DESTRUCT)	528	if (!IN_DESTRUCT)
515	{
516	dounwind (-1);/*D*//*remove*/
517	SvREFCNT_dec (PL_curstackinfo->si_stack);	529	SvREFCNT_dec (PL_curstackinfo->si_stack);
518	}
519		530
520	Safefree (PL_curstackinfo->si_cxstack);	531	Safefree (PL_curstackinfo->si_cxstack);
521	Safefree (PL_curstackinfo);	532	Safefree (PL_curstackinfo);
522	PL_curstackinfo = p;	533	PL_curstackinfo = p;
523	}	534	}
524		535
525	Safefree (PL_tmps_stack);	536	Safefree (PL_tmps_stack);
526	Safefree (PL_markstack);	537	Safefree (PL_markstack);
527	Safefree (PL_scopestack);	538	Safefree (PL_scopestack);
528	Safefree (PL_savestack);	539	Safefree (PL_savestack);
529	#if PERL_VERSION < 9	540	#if !PERL_VERSION_ATLEAST (5,9,0)
530	Safefree (PL_retstack);	541	Safefree (PL_retstack);
531	#endif	542	#endif
532	}	543	}
533		544
		545	/** coroutine stack handling ************************************************/
		546
534	static void	547	static void
535	setup_coro (struct coro *coro)	548	setup_coro (pTHX_ struct coro *coro)
536	{	549	{
537	/*	550	/*
538	* emulate part of the perl startup here.	551	* emulate part of the perl startup here.
539	*/	552	*/
540	dTHX;	553	coro_init_stacks (aTHX);
		554
		555	PL_curcop = &PL_compiling;
		556	PL_in_eval = EVAL_NULL;
		557	PL_comppad = 0;
		558	PL_curpm = 0;
		559	PL_localizing = 0;
		560	PL_dirty = 0;
		561	PL_restartop = 0;
		562
		563	{
		564	dSP;
		565	LOGOP myop;
		566
		567	SvREFCNT_dec (GvAV (PL_defgv));
		568	GvAV (PL_defgv) = coro->args; coro->args = 0;
		569
		570	Zero (&myop, 1, LOGOP);
		571	myop.op_next = Nullop;
		572	myop.op_flags = OPf_WANT_VOID;
		573
		574	PUSHMARK (SP);
		575	XPUSHs (av_shift (GvAV (PL_defgv)));
		576	PUTBACK;
		577	PL_op = (OP *)&myop;
		578	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		579	SPAGAIN;
		580	}
		581
		582	ENTER; /* necessary e.g. for dounwind */
		583	}
		584
		585	static void
		586	free_coro_mortal (pTHX)
		587	{
		588	if (coro_mortal)
		589	{
		590	SvREFCNT_dec (coro_mortal);
		591	coro_mortal = 0;
		592	}
		593	}
		594
		595	/* inject a fake call to Coro::State::_cctx_init into the execution */
		596	/* _cctx_init should be careful, as it could be called at almost any time */
		597	/* during execution of a perl program */
		598	static void NOINLINE
		599	prepare_cctx (pTHX_ coro_cctx *cctx)
		600	{
541	dSP;	601	dSP;
542	UNOP myop;	602	LOGOP myop;
543	SV *sub_init = (SV *)get_cv ("Coro::State::coro_init", FALSE);
544		603
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);	604	Zero (&myop, 1, LOGOP);
554	myop.op_next = Nullop;	605	myop.op_next = PL_op;
555	myop.op_flags = OPf_WANT_VOID;	606	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
556		607
		608	PUSHMARK (SP);
		609	EXTEND (SP, 2);
		610	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		611	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		612	PUTBACK;
557	PL_op = (OP *)&myop;	613	PL_op = (OP *)&myop;
558
559	PUSHMARK(SP);
560	XPUSHs (sub_init);
561	PUTBACK;
562	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	614	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
563	SPAGAIN;	615	SPAGAIN;
564
565	ENTER; /* necessary e.g. for dounwind */
566	}	616	}
567		617
568	static void	618	/*
569	free_coro_mortal ()	619	* this is a _very_ stripped down perl interpreter ;)
570	{	620	*/
571	if (coro_mortal)
572	{
573	dTHX;
574
575	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;
577	}
578	}
579
580	static void	621	static void
581	coro_run (void *arg)	622	coro_run (void *arg)
582	{	623	{
		624	dTHX;
		625
		626	/* coro_run is the alternative tail of transfer(), so unlock here. */
		627	UNLOCK;
		628
		629	PL_top_env = &PL_start_env;
		630
		631	/* inject a fake subroutine call to cctx_init */
		632	prepare_cctx (aTHX_ (coro_cctx *)arg);
		633
		634	/* somebody or something will hit me for both perl_run and PL_restartop */
		635	PL_restartop = PL_op;
		636	perl_run (PL_curinterp);
		637
583	/*	638	/*
584	* this is a _very_ stripped down perl interpreter ;)	639	* If perl-run returns we assume exit() was being called or the coro
		640	* fell off the end, which seems to be the only valid (non-bug)
		641	* reason for perl_run to return. We try to exit by jumping to the
		642	* bootstrap-time "top" top_env, as we cannot restore the "main"
		643	* coroutine as Coro has no such concept
585	*/	644	*/
586	dTHX;
587	int ret;
588
589	UNLOCK;
590
591	PL_top_env = &PL_start_env;	645	PL_top_env = main_top_env;
592		646	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
593	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV ((coro_stack *)arg));
594	sv_setiv (get_sv ("Coro::State::cctx_restartop", FALSE), PTR2IV (PL_op));
595
596	/* continue at cctx_init, without entersub */
597	PL_restartop = CvSTART (get_cv ("Coro::State::cctx_init", FALSE));
598
599	/* somebody will hit me for both perl_run and PL_restartop */
600	ret = perl_run (aTHX_ PERL_GET_CONTEXT);
601	printf ("ret %d\n", ret);//D
602
603	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
604	abort ();
605	}	647	}
606		648
607	static coro_stack *	649	static coro_cctx *
608	stack_new ()	650	cctx_new ()
609	{	651	{
610	coro_stack *stack;	652	coro_cctx *cctx;
		653	void *stack_start;
		654	size_t stack_size;
611		655
		656	++cctx_count;
		657
612	New (0, stack, 1, coro_stack);	658	Newz (0, cctx, 1, coro_cctx);
613		659
614	#if HAVE_MMAP	660	#if HAVE_MMAP
615		661
616	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	662	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
617	/* mmap suppsedly does allocate-on-write for us */	663	/* mmap supposedly does allocate-on-write for us */
618	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	664	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
619		665
620	if (stack->sptr == (void *)-1)	666	if (cctx->sptr != (void *)-1)
621	{
622	perror ("FATAL: unable to mmap stack for coroutine");
623	_exit (EXIT_FAILURE);
624	}	667	{
625
626	# if STACKGUARD	668	# if CORO_STACKGUARD
627	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	669	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
628	# endif	670	# endif
629		671	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
630	#else	672	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
631		673	cctx->mapped = 1;
632	stack->ssize = STACKSIZE * (long)sizeof (long);
633	New (0, stack->sptr, STACKSIZE, long);
634
635	if (!stack->sptr)
636	{	674	}
		675	else
		676	#endif
		677	{
		678	cctx->ssize = coro_stacksize * (long)sizeof (long);
		679	New (0, cctx->sptr, coro_stacksize, long);
		680
		681	if (!cctx->sptr)
		682	{
637	perror (stderr, "FATAL: unable to malloc stack for coroutine");	683	perror ("FATAL: unable to allocate stack for coroutine");
638	_exit (EXIT_FAILURE);	684	_exit (EXIT_FAILURE);
639	}	685	}
640		686
641	#endif	687	stack_start = cctx->sptr;
		688	stack_size = cctx->ssize;
		689	}
642		690
		691	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
643	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	692	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
644		693
645	return stack;	694	return cctx;
646	}	695	}
647		696
648	static void	697	static void
649	stack_free (coro_stack *stack)	698	cctx_destroy (coro_cctx *cctx)
650	{	699	{
651	if (!stack)	700	if (!cctx)
652	return;	701	return;
653		702
		703	--cctx_count;
		704
		705	#if CORO_USE_VALGRIND
		706	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		707	#endif
		708
654	#if HAVE_MMAP	709	#if HAVE_MMAP
		710	if (cctx->mapped)
655	munmap (stack->sptr, stack->ssize);	711	munmap (cctx->sptr, cctx->ssize);
656	#else
657	Safefree (stack->sptr);
658	#endif
659
660	Safefree (stack);
661	}
662
663	static coro_stack *stack_first;
664
665	static coro_stack *
666	stack_get ()
667	{
668	coro_stack *stack;
669
670	if (stack_first)
671	{
672	stack = stack_first;
673	stack_first = stack->next;
674	}
675	else	712	else
		713	#endif
		714	Safefree (cctx->sptr);
		715
		716	Safefree (cctx);
		717	}
		718
		719	static coro_cctx *
		720	cctx_get (pTHX)
		721	{
		722	while (cctx_first)
676	{	723	{
677	stack = stack_new ();	724	coro_cctx *cctx = cctx_first;
		725	cctx_first = cctx->next;
		726	--cctx_idle;
		727
		728	if (cctx->ssize >= coro_stacksize)
		729	return cctx;
		730
		731	cctx_destroy (cctx);
		732	}
		733
678	PL_op = PL_op->op_next;	734	PL_op = PL_op->op_next;
		735	return cctx_new ();
		736	}
		737
		738	static void
		739	cctx_put (coro_cctx *cctx)
		740	{
		741	/* free another cctx if overlimit */
		742	if (cctx_idle >= MAX_IDLE_CCTX)
		743	{
		744	coro_cctx *first = cctx_first;
		745	cctx_first = first->next;
		746	--cctx_idle;
		747
		748	assert (!first->inuse);
		749	cctx_destroy (first);
679	}	750	}
680		751
681	return stack;	752	++cctx_idle;
		753	cctx->next = cctx_first;
		754	cctx_first = cctx;
682	}	755	}
683		756
684	static void	757	/** coroutine switching *****************************************************/
685	stack_put (coro_stack *stack)
686	{
687	stack->next = stack_first;
688	stack_first = stack;
689	}
690		758
691	/* never call directly, always through the coro_state_transfer global variable */	759	/* never call directly, always through the coro_state_transfer global variable */
692	static void	760	static void NOINLINE
693	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	761	transfer (pTHX_ struct coro *prev, struct coro *next)
694	{	762	{
695	dSTACKLEVEL;	763	dSTACKLEVEL;
696		764
697	/* sometimes transfer is only called to set idle_sp */	765	/* sometimes transfer is only called to set idle_sp */
698	if (flags == TRANSFER_SET_STACKLEVEL)	766	if (!next)
		767	{
699	((coro_stack *)prev)->idle_sp = STACKLEVEL;	768	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		769	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		770	}
700	else if (prev != next)	771	else if (prev != next)
701	{	772	{
702	coro_stack *prev__stack;	773	coro_cctx *prev__cctx;
		774
		775	if (prev->flags & CF_NEW)
		776	{
		777	/* create a new empty context */
		778	Newz (0, prev->cctx, 1, coro_cctx);
		779	prev->cctx->inuse = 1;
		780	prev->flags &= ~CF_NEW;
		781	prev->flags |= CF_RUNNING;
		782	}
		783
		784	/*TODO: must not croak here */
		785	if (!prev->flags & CF_RUNNING)
		786	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		787
		788	if (next->flags & CF_RUNNING)
		789	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		790
		791	if (next->flags & CF_DESTROYED)
		792	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		793
		794	prev->flags &= ~CF_RUNNING;
		795	next->flags |= CF_RUNNING;
703		796
704	LOCK;	797	LOCK;
705		798
706	if (next->mainstack)	799	if (next->flags & CF_NEW)
707	{	800	{
708	/* coroutine already started */	801	/* need to start coroutine */
709	SAVE (prev, flags);	802	next->flags &= ~CF_NEW;
710	LOAD (next);	803	/* first get rid of the old state */
		804	save_perl (aTHX_ prev);
		805	/* setup coroutine call */
		806	setup_coro (aTHX_ next);
		807	/* need a new stack */
		808	assert (!next->cctx);
711	}	809	}
712	else	810	else
713	{	811	{
714	/* need to start coroutine */	812	/* coroutine already started */
715	/* first get rid of the old state */	813	save_perl (aTHX_ prev);
716	SAVE (prev, -1);	814	load_perl (aTHX_ next);
717	/* setup coroutine call */
718	setup_coro (next);
719	/* need a stack */
720	next->stack = 0;
721	}	815	}
722		816
723	if (!prev->stack)
724	/* create a new empty context */
725	Newz (0, prev->stack, 1, coro_stack);
726
727	prev__stack = prev->stack;	817	prev__cctx = prev->cctx;
728		818
729	/* possibly "free" the stack */	819	/* possibly "free" the cctx */
730	if (prev__stack->idle_sp == STACKLEVEL)	820	if (prev__cctx->idle_sp == STACKLEVEL)
731	{	821	{
732	stack_put (prev__stack);	822	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		823	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		824
733	prev->stack = 0;	825	prev->cctx = 0;
		826
		827	cctx_put (prev__cctx);
		828	prev__cctx->inuse = 0;
734	}	829	}
735		830
736	if (!next->stack)	831	if (!next->cctx)
737	next->stack = stack_get ();
738
739	if (prev__stack != next->stack)
740	{	832	{
741	prev__stack->top_env = PL_top_env;	833	next->cctx = cctx_get (aTHX);
742	PL_top_env = next->stack->top_env;	834	assert (!next->cctx->inuse);
743	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	835	next->cctx->inuse = 1;
744	}	836	}
745		837
		838	if (prev__cctx != next->cctx)
		839	{
		840	prev__cctx->top_env = PL_top_env;
		841	PL_top_env = next->cctx->top_env;
		842	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		843	}
		844
746	free_coro_mortal ();	845	free_coro_mortal (aTHX);
747
748	UNLOCK;	846	UNLOCK;
749	}	847	}
750	}	848	}
751		849
752	/* use this function pointer to call the above function */
753	/* this is done to increase chances of the compiler not inlining the call */
754	/* not static to make it even harder for the compiler (and theoretically impossible in most cases */
755	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;
756
757	struct transfer_args	850	struct transfer_args
758	{	851	{
759	struct coro *prev, *next;	852	struct coro *prev, *next;
760	int flags;
761	};	853	};
762		854
763	#define TRANSFER(ta) coro_state_transfer ((ta).prev, (ta).next, (ta).flags)	855	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
764		856
		857	/** high level stuff ********************************************************/
		858
765	static void	859	static int
766	coro_state_destroy (struct coro *coro)	860	coro_state_destroy (pTHX_ struct coro *coro)
767	{	861	{
768	if (coro->refcnt--)	862	if (coro->flags & CF_DESTROYED)
769	return;	863	return 0;
		864
		865	coro->flags |= CF_DESTROYED;
		866
		867	if (coro->flags & CF_READY)
		868	{
		869	/* reduce nready, as destroying a ready coro effectively unreadies it */
		870	/* alternative: look through all ready queues and remove the coro */
		871	LOCK;
		872	--coro_nready;
		873	UNLOCK;
		874	}
		875	else
		876	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
770		877
771	if (coro->mainstack && coro->mainstack != main_mainstack)	878	if (coro->mainstack && coro->mainstack != main_mainstack)
772	{	879	{
773	struct coro temp;	880	struct coro temp;
774		881
775	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	882	assert (!(coro->flags & CF_RUNNING));
		883
		884	Zero (&temp, 1, struct coro);
		885	temp.save = CORO_SAVE_ALL;
		886
		887	if (coro->flags & CF_RUNNING)
		888	croak ("FATAL: tried to destroy currently running coroutine");
		889
		890	save_perl (aTHX_ &temp);
776	LOAD (aTHX_ coro);	891	load_perl (aTHX_ coro);
777		892
778	destroy_stacks (aTHX);	893	coro_destroy_stacks (aTHX);
779		894
780	LOAD ((&temp)); /* this will get rid of defsv etc.. */	895	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
781		896
782	coro->mainstack = 0;	897	coro->mainstack = 0;
783	}	898	}
784		899
785	stack_free (coro->stack);	900	cctx_destroy (coro->cctx);
786	SvREFCNT_dec (coro->args);	901	SvREFCNT_dec (coro->args);
787	Safefree (coro);	902
		903	if (coro->next) coro->next->prev = coro->prev;
		904	if (coro->prev) coro->prev->next = coro->next;
		905	if (coro == first) first = coro->next;
		906
		907	return 1;
788	}	908	}
789		909
790	static int	910	static int
791	coro_state_clear (SV *sv, MAGIC *mg)	911	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
792	{	912	{
793	struct coro *coro = (struct coro *)mg->mg_ptr;	913	struct coro *coro = (struct coro *)mg->mg_ptr;
794	mg->mg_ptr = 0;	914	mg->mg_ptr = 0;
795		915
		916	coro->hv = 0;
		917
		918	if (--coro->refcnt < 0)
		919	{
796	coro_state_destroy (coro);	920	coro_state_destroy (aTHX_ coro);
		921	Safefree (coro);
		922	}
797		923
798	return 0;	924	return 0;
799	}	925	}
800		926
801	static int	927	static int
802	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	928	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
803	{	929	{
804	struct coro *coro = (struct coro *)mg->mg_ptr;	930	struct coro *coro = (struct coro *)mg->mg_ptr;
805		931
806	++coro->refcnt;	932	++coro->refcnt;
807		933
808	return 0;	934	return 0;
809	}	935	}
810		936
811	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	937	static MGVTBL coro_state_vtbl = {
		938	0, 0, 0, 0,
		939	coro_state_free,
		940	0,
		941	#ifdef MGf_DUP
		942	coro_state_dup,
		943	#else
		944	# define MGf_DUP 0
		945	#endif
		946	};
812		947
813	static struct coro *	948	static struct coro *
814	SvSTATE (SV *coro)	949	SvSTATE_ (pTHX_ SV *coro)
815	{	950	{
816	HV *stash;	951	HV *stash;
817	MAGIC *mg;	952	MAGIC *mg;
818		953
819	if (SvROK (coro))	954	if (SvROK (coro))
…		…
825	/* very slow, but rare, check */	960	/* very slow, but rare, check */
826	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))	961	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
827	croak ("Coro::State object required");	962	croak ("Coro::State object required");
828	}	963	}
829		964
830	mg = SvMAGIC (coro);	965	mg = CORO_MAGIC (coro);
831	assert (mg->mg_type == PERL_MAGIC_ext);
832	return (struct coro *)mg->mg_ptr;	966	return (struct coro *)mg->mg_ptr;
833	}	967	}
834		968
		969	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		970
835	static void	971	static void
836	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev, SV *next, int flags)	972	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
837	{	973	{
838	ta->prev = SvSTATE (prev);	974	ta->prev = SvSTATE (prev_sv);
839	ta->next = SvSTATE (next);	975	ta->next = SvSTATE (next_sv);
840	ta->flags = flags;
841	}	976	}
842		977
843	static void	978	static void
844	api_transfer (SV *prev, SV *next, int flags)	979	api_transfer (SV *prev_sv, SV *next_sv)
845	{	980	{
846	dTHX;	981	dTHX;
847	struct transfer_args ta;	982	struct transfer_args ta;
848		983
849	prepare_transfer (aTHX_ &ta, prev, next, flags);	984	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
850	TRANSFER (ta);	985	TRANSFER (ta);
851	}	986	}
852		987
		988	static int
		989	api_save (SV *coro_sv, int new_save)
		990	{
		991	dTHX;
		992	struct coro *coro = SvSTATE (coro_sv);
		993	int old_save = coro->save;
		994
		995	if (new_save >= 0)
		996	coro->save = new_save;
		997
		998	return old_save;
		999	}
		1000
853	/** Coro ********************************************************************/	1001	/** Coro ********************************************************************/
854		1002
855	#define PRIO_MAX 3
856	#define PRIO_HIGH 1
857	#define PRIO_NORMAL 0
858	#define PRIO_LOW -1
859	#define PRIO_IDLE -3
860	#define PRIO_MIN -4
861
862	/* for Coro.pm */
863	static GV *coro_current, *coro_idle;
864	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
865	static int coro_nready;
866
867	static void	1003	static void
868	coro_enq (pTHX_ SV *sv)	1004	coro_enq (pTHX_ SV *coro_sv)
869	{	1005	{
870	int prio;
871
872	if (SvTYPE (sv) != SVt_PVHV)
873	croak ("Coro::ready tried to enqueue something that is not a coroutine");
874
875	prio = SvSTATE (sv)->prio;
876
877	av_push (coro_ready [prio - PRIO_MIN], sv);	1006	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
878	coro_nready++;
879	}	1007	}
880		1008
881	static SV *	1009	static SV *
882	coro_deq (pTHX_ int min_prio)	1010	coro_deq (pTHX_ int min_prio)
883	{	1011	{
…		…
887	if (min_prio < 0)	1015	if (min_prio < 0)
888	min_prio = 0;	1016	min_prio = 0;
889		1017
890	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1018	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
891	if (AvFILLp (coro_ready [prio]) >= 0)	1019	if (AvFILLp (coro_ready [prio]) >= 0)
892	{
893	coro_nready--;
894	return av_shift (coro_ready [prio]);	1020	return av_shift (coro_ready [prio]);
895	}
896		1021
897	return 0;	1022	return 0;
898	}	1023	}
899		1024
900	static void	1025	static int
901	api_ready (SV *coro)	1026	api_ready (SV *coro_sv)
902	{	1027	{
903	dTHX;	1028	dTHX;
		1029	struct coro *coro;
904		1030
905	if (SvROK (coro))	1031	if (SvROK (coro_sv))
906	coro = SvRV (coro);	1032	coro_sv = SvRV (coro_sv);
		1033
		1034	coro = SvSTATE (coro_sv);
		1035
		1036	if (coro->flags & CF_READY)
		1037	return 0;
		1038
		1039	coro->flags |= CF_READY;
907		1040
908	LOCK;	1041	LOCK;
909	coro_enq (aTHX_ SvREFCNT_inc (coro));	1042	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1043	++coro_nready;
910	UNLOCK;	1044	UNLOCK;
911	}
912		1045
		1046	return 1;
		1047	}
		1048
913	static void	1049	static int
		1050	api_is_ready (SV *coro_sv)
		1051	{
		1052	dTHX;
		1053	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1054	}
		1055
		1056	static void
914	prepare_schedule (aTHX_ struct transfer_args *ta)	1057	prepare_schedule (pTHX_ struct transfer_args *ta)
915	{	1058	{
916	SV *current, *prev, *next;	1059	SV *prev_sv, *next_sv;
		1060
		1061	for (;;)
		1062	{
		1063	LOCK;
		1064	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1065
		1066	/* nothing to schedule: call the idle handler */
		1067	if (!next_sv)
		1068	{
		1069	dSP;
		1070	UNLOCK;
		1071
		1072	ENTER;
		1073	SAVETMPS;
		1074
		1075	PUSHMARK (SP);
		1076	PUTBACK;
		1077	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1078
		1079	FREETMPS;
		1080	LEAVE;
		1081	continue;
		1082	}
		1083
		1084	ta->next = SvSTATE (next_sv);
		1085
		1086	/* cannot transfer to destroyed coros, skip and look for next */
		1087	if (ta->next->flags & CF_DESTROYED)
		1088	{
		1089	UNLOCK;
		1090	SvREFCNT_dec (next_sv);
		1091	/* coro_nready is already taken care of by destroy */
		1092	continue;
		1093	}
		1094
		1095	--coro_nready;
		1096	UNLOCK;
		1097	break;
		1098	}
		1099
		1100	/* free this only after the transfer */
		1101	prev_sv = SvRV (coro_current);
		1102	SvRV_set (coro_current, next_sv);
		1103	ta->prev = SvSTATE (prev_sv);
		1104
		1105	assert (ta->next->flags & CF_READY);
		1106	ta->next->flags &= ~CF_READY;
917		1107
918	LOCK;	1108	LOCK;
919
920	current = GvSV (coro_current);
921
922	for (;;)
923	{
924	LOCK;
925
926	next = coro_deq (aTHX_ PRIO_MIN);
927
928	if (next)
929	break;
930
931	UNLOCK;
932
933	{
934	dSP;
935
936	ENTER;
937	SAVETMPS;
938
939	PUSHMARK (SP);
940	PUTBACK;
941	call_sv (GvSV (coro_idle), G_DISCARD);
942
943	FREETMPS;
944	LEAVE;
945	}
946	}
947
948	prev = SvRV (current);
949	SvRV (current) = next;
950
951	/* free this only after the transfer */
952	free_coro_mortal ();	1109	free_coro_mortal (aTHX);
953	coro_mortal = prev;	1110	coro_mortal = prev_sv;
954
955	ta->prev = SvSTATE (prev);
956	ta->next = SvSTATE (next);
957	ta->flags = TRANSFER_SAVE_ALL;
958
959	UNLOCK;	1111	UNLOCK;
960	}	1112	}
961		1113
962	static void	1114	static void
963	prepare_cede (aTHX_ struct transfer_args *ta)	1115	prepare_cede (pTHX_ struct transfer_args *ta)
964	{	1116	{
965	LOCK;	1117	api_ready (coro_current);
966	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
967	UNLOCK;
968
969	prepare_schedule (ta);	1118	prepare_schedule (aTHX_ ta);
		1119	}
		1120
		1121	static int
		1122	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1123	{
		1124	if (coro_nready)
		1125	{
		1126	SV *prev = SvRV (coro_current);
		1127	prepare_schedule (aTHX_ ta);
		1128	api_ready (prev);
		1129	return 1;
		1130	}
		1131	else
		1132	return 0;
970	}	1133	}
971		1134
972	static void	1135	static void
973	api_schedule (void)	1136	api_schedule (void)
974	{	1137	{
975	dTHX;	1138	dTHX;
976	struct transfer_args ta;	1139	struct transfer_args ta;
977		1140
978	prepare_schedule (&ta);	1141	prepare_schedule (aTHX_ &ta);
979	TRANSFER (ta);	1142	TRANSFER (ta);
980	}	1143	}
981		1144
982	static void	1145	static int
983	api_cede (void)	1146	api_cede (void)
984	{	1147	{
985	dTHX;	1148	dTHX;
986	struct transfer_args ta;	1149	struct transfer_args ta;
987		1150
988	prepare_cede (&ta);	1151	prepare_cede (aTHX_ &ta);
		1152
		1153	if (ta.prev != ta.next)
		1154	{
989	TRANSFER (ta);	1155	TRANSFER (ta);
		1156	return 1;
		1157	}
		1158	else
		1159	return 0;
		1160	}
		1161
		1162	static int
		1163	api_cede_notself (void)
		1164	{
		1165	dTHX;
		1166	struct transfer_args ta;
		1167
		1168	if (prepare_cede_notself (aTHX_ &ta))
		1169	{
		1170	TRANSFER (ta);
		1171	return 1;
		1172	}
		1173	else
		1174	return 0;
990	}	1175	}
991		1176
992	MODULE = Coro::State PACKAGE = Coro::State	1177	MODULE = Coro::State PACKAGE = Coro::State
993		1178
994	PROTOTYPES: DISABLE	1179	PROTOTYPES: DISABLE
…		…
1000	#endif	1185	#endif
1001	BOOT_PAGESIZE;	1186	BOOT_PAGESIZE;
1002		1187
1003	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1188	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1004		1189
1005	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1190	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
1006	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1191	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
1007	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1192	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1193	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1194	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
		1195	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1196	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
1008		1197
1009	main_mainstack = PL_mainstack;	1198	main_mainstack = PL_mainstack;
		1199	main_top_env = PL_top_env;
		1200
		1201	while (main_top_env->je_prev)
		1202	main_top_env = main_top_env->je_prev;
1010		1203
1011	coroapi.ver = CORO_API_VERSION;	1204	coroapi.ver = CORO_API_VERSION;
1012	coroapi.transfer = api_transfer;	1205	coroapi.transfer = api_transfer;
1013		1206
1014	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1207	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
…		…
1022	HV *hv;	1215	HV *hv;
1023	int i;	1216	int i;
1024		1217
1025	Newz (0, coro, 1, struct coro);	1218	Newz (0, coro, 1, struct coro);
1026	coro->args = newAV ();	1219	coro->args = newAV ();
		1220	coro->save = CORO_SAVE_DEF;
		1221	coro->flags = CF_NEW;
1027		1222
		1223	if (first) first->prev = coro;
		1224	coro->next = first;
		1225	first = coro;
		1226
1028	hv = newHV ();	1227	coro->hv = hv = newHV ();
1029	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1228	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1030	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1229	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1031		1230
1032	for (i = 1; i < items; i++)	1231	for (i = 1; i < items; i++)
1033	av_push (coro->args, newSVsv (ST (i)));	1232	av_push (coro->args, newSVsv (ST (i)));
1034
1035	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1036	/*coro->stack = 0;*/
1037	}	1233	}
1038	OUTPUT:	1234	OUTPUT:
		1235	RETVAL
		1236
		1237	int
		1238	save (SV *coro, int new_save = -1)
		1239	CODE:
		1240	RETVAL = api_save (coro, new_save);
		1241	OUTPUT:
		1242	RETVAL
		1243
		1244	int
		1245	save_also (SV *coro_sv, int save_also)
		1246	CODE:
		1247	{
		1248	struct coro *coro = SvSTATE (coro_sv);
		1249	RETVAL = coro->save;
		1250	coro->save |= save_also;
		1251	}
		1252	OUTPUT:
1039	RETVAL	1253	RETVAL
1040		1254
1041	void	1255	void
1042	_set_stacklevel (...)	1256	_set_stacklevel (...)
1043	ALIAS:	1257	ALIAS:
1044	Coro::State::transfer = 1	1258	Coro::State::transfer = 1
1045	Coro::schedule = 2	1259	Coro::schedule = 2
1046	Coro::cede = 3	1260	Coro::cede = 3
1047	Coro::Cont::yield = 4	1261	Coro::cede_notself = 4
1048	CODE:	1262	CODE:
1049	{	1263	{
1050	struct transfer_args ta;	1264	struct transfer_args ta;
1051		1265
1052	switch (ix)	1266	switch (ix)
1053	{	1267	{
1054	case 0:	1268	case 0:
1055	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1269	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1056	ta.next = 0;	1270	ta.next = 0;
1057	ta.flags = TRANSFER_SET_STACKLEVEL;
1058	break;	1271	break;
1059		1272
1060	case 1:	1273	case 1:
1061	if (items != 3)	1274	if (items != 2)
1062	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1275	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1063		1276
1064	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1277	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1065	break;	1278	break;
1066		1279
1067	case 2:	1280	case 2:
1068	prepare_schedule (&ta);	1281	prepare_schedule (aTHX_ &ta);
1069	break;	1282	break;
1070		1283
1071	case 3:	1284	case 3:
1072	prepare_cede (&ta);	1285	prepare_cede (aTHX_ &ta);
1073	break;	1286	break;
1074		1287
1075	case 4:	1288	case 4:
1076	{	1289	if (!prepare_cede_notself (aTHX_ &ta))
1077	SV *yieldstack;	1290	XSRETURN_EMPTY;
1078	SV *sv;
1079	AV *defav = GvAV (PL_defgv);
1080		1291
1081	yieldstack = *hv_fetch (
1082	(HV *)SvRV (GvSV (coro_current)),
1083	"yieldstack", sizeof ("yieldstack") - 1,
1084	0
1085	);
1086
1087	/* set up @_ -- ugly */
1088	av_clear (defav);
1089	av_fill (defav, items - 1);
1090	while (items--)
1091	av_store (defav, items, SvREFCNT_inc (ST(items)));
1092
1093	sv = av_pop ((AV *)SvRV (yieldstack));
1094	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1095	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1096	ta.flags = 0;
1097	SvREFCNT_dec (sv);
1098	}
1099	break;	1292	break;
1100
1101	}	1293	}
1102		1294
		1295	BARRIER;
1103	TRANSFER (ta);	1296	TRANSFER (ta);
1104	}
1105		1297
1106	void	1298	if (GIMME_V != G_VOID && ta.next != ta.prev)
1107	_clone_state_from (SV *dst, SV *src)	1299	XSRETURN_YES;
		1300	}
		1301
		1302	bool
		1303	_destroy (SV *coro_sv)
1108	CODE:	1304	CODE:
1109	{	1305	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1110	struct coro *coro_src = SvSTATE (src);	1306	OUTPUT:
1111		1307	RETVAL
1112	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1113
1114	++coro_src->refcnt;
1115	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1116	}
1117
1118	void
1119	_nonlocal_goto (IV nextop)
1120	CODE:
1121	/* uuh, somebody will kill me again for this */
1122	PL_op->op_next = INT2PTR (OP *, nextop);
1123		1308
1124	void	1309	void
1125	_exit (code)	1310	_exit (code)
1126	int code	1311	int code
1127	PROTOTYPE: $	1312	PROTOTYPE: $
1128	CODE:	1313	CODE:
1129	_exit (code);	1314	_exit (code);
1130		1315
		1316	int
		1317	cctx_stacksize (int new_stacksize = 0)
		1318	CODE:
		1319	RETVAL = coro_stacksize;
		1320	if (new_stacksize)
		1321	coro_stacksize = new_stacksize;
		1322	OUTPUT:
		1323	RETVAL
		1324
		1325	int
		1326	cctx_count ()
		1327	CODE:
		1328	RETVAL = cctx_count;
		1329	OUTPUT:
		1330	RETVAL
		1331
		1332	int
		1333	cctx_idle ()
		1334	CODE:
		1335	RETVAL = cctx_idle;
		1336	OUTPUT:
		1337	RETVAL
		1338
		1339	void
		1340	list ()
		1341	PPCODE:
		1342	{
		1343	struct coro *coro;
		1344	for (coro = first; coro; coro = coro->next)
		1345	if (coro->hv)
		1346	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1347	}
		1348
		1349	void
		1350	_eval (SV *coro_sv, SV *coderef)
		1351	CODE:
		1352	{
		1353	struct coro *coro = SvSTATE (coro_sv);
		1354	if (coro->mainstack)
		1355	{
		1356	struct coro temp;
		1357	Zero (&temp, 1, struct coro);
		1358	temp.save = CORO_SAVE_ALL;
		1359
		1360	if (!(coro->flags & CF_RUNNING))
		1361	{
		1362	save_perl (aTHX_ &temp);
		1363	load_perl (aTHX_ coro);
		1364	}
		1365
		1366	{
		1367	dSP;
		1368	ENTER;
		1369	SAVETMPS;
		1370	PUSHMARK (SP);
		1371	PUTBACK;
		1372	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1373	SPAGAIN;
		1374	FREETMPS;
		1375	LEAVE;
		1376	PUTBACK;
		1377	}
		1378
		1379	if (!(coro->flags & CF_RUNNING))
		1380	{
		1381	save_perl (aTHX_ coro);
		1382	load_perl (aTHX_ &temp);
		1383	}
		1384	}
		1385	}
		1386
		1387	SV *
		1388	is_ready (SV *coro_sv)
		1389	PROTOTYPE: $
		1390	ALIAS:
		1391	is_ready = CF_READY
		1392	is_running = CF_RUNNING
		1393	is_new = CF_NEW
		1394	is_destroyed = CF_DESTROYED
		1395	CODE:
		1396	struct coro *coro = SvSTATE (coro_sv);
		1397	RETVAL = boolSV (coro->flags & ix);
		1398	OUTPUT:
		1399	RETVAL
		1400
		1401
1131	MODULE = Coro::State PACKAGE = Coro	1402	MODULE = Coro::State PACKAGE = Coro
1132		1403
1133	BOOT:	1404	BOOT:
1134	{	1405	{
1135	int i;	1406	int i;
…		…
1141	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1412	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1142	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1413	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1143	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1414	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1144	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1415	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1145		1416
1146	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1417	coro_current = get_sv ("Coro::current", FALSE);
1147	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1418	SvREADONLY_on (coro_current);
1148		1419
1149	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1420	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1150	coro_ready[i] = newAV ();	1421	coro_ready[i] = newAV ();
1151		1422
1152	{	1423	{
1153	SV *sv = perl_get_sv("Coro::API", 1);	1424	SV *sv = perl_get_sv("Coro::API", 1);
1154		1425
1155	coroapi.schedule = api_schedule;	1426	coroapi.schedule = api_schedule;
		1427	coroapi.save = api_save;
1156	coroapi.cede = api_cede;	1428	coroapi.cede = api_cede;
		1429	coroapi.cede_notself = api_cede_notself;
1157	coroapi.ready = api_ready;	1430	coroapi.ready = api_ready;
		1431	coroapi.is_ready = api_is_ready;
1158	coroapi.nready = &coro_nready;	1432	coroapi.nready = &coro_nready;
1159	coroapi.current = coro_current;	1433	coroapi.current = coro_current;
1160		1434
1161	GCoroAPI = &coroapi;	1435	GCoroAPI = &coroapi;
1162	sv_setiv (sv, (IV)&coroapi);	1436	sv_setiv (sv, (IV)&coroapi);
1163	SvREADONLY_on (sv);	1437	SvREADONLY_on (sv);
1164	}	1438	}
1165	}	1439	}
		1440
		1441	void
		1442	_set_current (SV *current)
		1443	PROTOTYPE: $
		1444	CODE:
		1445	SvREFCNT_dec (SvRV (coro_current));
		1446	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1166		1447
1167	int	1448	int
1168	prio (Coro::State coro, int newprio = 0)	1449	prio (Coro::State coro, int newprio = 0)
1169	ALIAS:	1450	ALIAS:
1170	nice = 1	1451	nice = 1
…		…
1173	RETVAL = coro->prio;	1454	RETVAL = coro->prio;
1174		1455
1175	if (items > 1)	1456	if (items > 1)
1176	{	1457	{
1177	if (ix)	1458	if (ix)
1178	newprio += coro->prio;	1459	newprio = coro->prio - newprio;
1179		1460
1180	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1461	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1181	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1462	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1182		1463
1183	coro->prio = newprio;	1464	coro->prio = newprio;
1184	}	1465	}
1185	}	1466	}
		1467	OUTPUT:
		1468	RETVAL
1186		1469
1187	void	1470	SV *
1188	ready (SV *self)	1471	ready (SV *self)
1189	PROTOTYPE: $	1472	PROTOTYPE: $
1190	CODE:	1473	CODE:
1191	api_ready (self);	1474	RETVAL = boolSV (api_ready (self));
		1475	OUTPUT:
		1476	RETVAL
1192		1477
1193	int	1478	int
1194	nready (...)	1479	nready (...)
1195	PROTOTYPE:	1480	PROTOTYPE:
1196	CODE:	1481	CODE:
…		…
1202		1487
1203	SV *	1488	SV *
1204	_get_state ()	1489	_get_state ()
1205	CODE:	1490	CODE:
1206	{	1491	{
1207	struct {	1492	struct io_state *data;
1208	int errorno;
1209	int laststype;
1210	int laststatval;
1211	Stat_t statcache;
1212	} data;
1213		1493
		1494	RETVAL = newSV (sizeof (struct io_state));
		1495	data = (struct io_state *)SvPVX (RETVAL);
		1496	SvCUR_set (RETVAL, sizeof (struct io_state));
		1497	SvPOK_only (RETVAL);
		1498
1214	data.errorno = errno;	1499	data->errorno = errno;
1215	data.laststype = PL_laststype;	1500	data->laststype = PL_laststype;
1216	data.laststatval = PL_laststatval;	1501	data->laststatval = PL_laststatval;
1217	data.statcache = PL_statcache;	1502	data->statcache = PL_statcache;
1218
1219	RETVAL = newSVpvn ((char *)&data, sizeof data);
1220	}	1503	}
1221	OUTPUT:	1504	OUTPUT:
1222	RETVAL	1505	RETVAL
1223		1506
1224	void	1507	void
1225	_set_state (char *data_)	1508	_set_state (char *data_)
1226	PROTOTYPE: $	1509	PROTOTYPE: $
1227	CODE:	1510	CODE:
1228	{	1511	{
1229	struct {	1512	struct io_state *data = (void *)data_;
1230	int errorno;
1231	int laststype;
1232	int laststatval;
1233	Stat_t statcache;
1234	} *data = (void *)data_;
1235		1513
1236	errno = data->errorno;	1514	errno = data->errorno;
1237	PL_laststype = data->laststype;	1515	PL_laststype = data->laststype;
1238	PL_laststatval = data->laststatval;	1516	PL_laststatval = data->laststatval;
1239	PL_statcache = data->statcache;	1517	PL_statcache = data->statcache;
1240	}	1518	}
		1519

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines