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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.90 by root, Sat Nov 25 00:56:35 2006 UTC vs.
Revision 1.191 by root, Fri Oct 5 20:47:49 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <errno.h>	75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
		79
		80	/* 5.8.8 */
		81	#ifndef GV_NOTQUAL
		82	# define GV_NOTQUAL 0
		83	#endif
		84	#ifndef newSV
		85	# define newSV(l) NEWSV(0,l)
		86	#endif
33		87
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	88	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	89	# undef CORO_STACKGUARD
36	#endif
37
38	#ifndef STACKGUARD
39	# define STACKGUARD 0
40	#endif
41
42	#ifdef HAVE_MMAP
43	# include <unistd.h>
44	# include <sys/mman.h>
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	90	#endif
52	# include <limits.h>	91
53	# ifndef PAGESIZE	92	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	93	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	94	#endif
60	#endif
61		95
62	#define SUB_INIT "Coro::State::initialize"	96	/* prefer perl internal functions over our own? */
		97	#ifndef CORO_PREFER_PERL_FUNCTIONS
		98	# define CORO_PREFER_PERL_FUNCTIONS 0
		99	#endif
63		100
64	/* The next macro should declare a variable stacklevel that contains and approximation	101	/* The next macros try to return the current stack pointer, in an as
65	* to the current C stack pointer. Its property is that it changes with each call	102	* portable way as possible. */
66	* and should be unique. */	103	#define dSTACKLEVEL volatile char stacklevel
67	#define dSTACKLEVEL void *stacklevel = &stacklevel	104	#define STACKLEVEL ((void *)&stacklevel)
68		105
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	106	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		107
71	#define labs(l) ((l) >= 0 ? (l) : -(l))	108	#if __GNUC__ >= 3
		109	# define attribute(x) __attribute__(x)
		110	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		111	#else
		112	# define attribute(x)
		113	# define BARRIER
		114	#endif
		115
		116	#define NOINLINE attribute ((noinline))
72		117
73	#include "CoroAPI.h"	118	#include "CoroAPI.h"
74		119
75	#ifdef USE_ITHREADS	120	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	121	static perl_mutex coro_mutex;
…		…
79	#else	124	#else
80	# define LOCK (void)0	125	# define LOCK (void)0
81	# define UNLOCK (void)0	126	# define UNLOCK (void)0
82	#endif	127	#endif
83		128
		129	/* helper storage struct for Coro::AIO */
		130	struct io_state
		131	{
		132	int errorno;
		133	I32 laststype;
		134	int laststatval;
		135	Stat_t statcache;
		136	};
		137
		138	static size_t coro_stacksize = CORO_STACKSIZE;
84	static struct CoroAPI coroapi;	139	static struct CoroAPI coroapi;
85	static AV *main_mainstack; /* used to differentiate between $main and others */	140	static AV *main_mainstack; /* used to differentiate between $main and others */
		141	static JMPENV *main_top_env;
86	static HV *coro_state_stash, *coro_stash;	142	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	143	static SV *coro_mortal; /* will be freed after next transfer */
88		144
89	/* this is actually not just the c stack but also c registers etc... */	145	static GV *irsgv; /* $/ */
		146	static GV *stdoutgv; /* *STDOUT */
		147
		148	/* async_pool helper stuff */
		149	static SV *sv_pool_rss;
		150	static SV *sv_pool_size;
		151	static AV *av_async_pool;
		152
		153	static struct coro_cctx *cctx_first;
		154	static int cctx_count, cctx_idle;
		155
		156	enum {
		157	CC_MAPPED = 0x01,
		158	CC_NOREUSE = 0x02, /* throw this away after tracing */
		159	CC_TRACE = 0x04,
		160	CC_TRACE_SUB = 0x08, /* trace sub calls */
		161	CC_TRACE_LINE = 0x10, /* trace each statement */
		162	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		163	};
		164
		165	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	166	typedef struct coro_cctx {
91	struct coro_stack *next;	167	struct coro_cctx *next;
92		168
93	void *idle_sp;	169	/* the stack */
94	void *sptr;	170	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	171	size_t ssize;
96		172
97	/* cpu state */	173	/* cpu state */
		174	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		175	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		176	JMPENV *top_env;
98	coro_context cctx;	177	coro_context cctx;
99	} coro_stack;
100		178
101	static coro_stack *main_stack;	179	#if CORO_USE_VALGRIND
		180	int valgrind_id;
		181	#endif
		182	unsigned char flags;
		183	} coro_cctx;
102		184
		185	enum {
		186	CF_RUNNING = 0x0001, /* coroutine is running */
		187	CF_READY = 0x0002, /* coroutine is ready */
		188	CF_NEW = 0x0004, /* has never been switched to */
		189	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		190	};
		191
		192	/* this is a structure representing a perl-level coroutine */
103	struct coro {	193	struct coro {
104	/* optionally saved, might be zero */	194	/* the c coroutine allocated to this perl coroutine, if any */
105	AV *defav;	195	coro_cctx *cctx;
106	SV *defsv;
107	SV *errsv;
108
109	/* saved global state not related to stacks */
110	U8 dowarn;
111	I32 in_eval;
112
113	/* the c stack, if any */
114	coro_stack *stack;
115
116	/* the stacks and related info (callchain etc..) */
117	PERL_SI *curstackinfo;
118	AV *curstack;
119	AV *mainstack;
120	SV **stack_sp;
121	OP *op;
122	SV **curpad;
123	AV *comppad;
124	CV *compcv;
125	SV **stack_base;
126	SV **stack_max;
127	SV **tmps_stack;
128	I32 tmps_floor;
129	I32 tmps_ix;
130	I32 tmps_max;
131	I32 *markstack;
132	I32 *markstack_ptr;
133	I32 *markstack_max;
134	I32 *scopestack;
135	I32 scopestack_ix;
136	I32 scopestack_max;
137	ANY *savestack;
138	I32 savestack_ix;
139	I32 savestack_max;
140	OP **retstack;
141	I32 retstack_ix;
142	I32 retstack_max;
143	PMOP *curpm;
144	COP *curcop;
145	JMPENV *top_env;
146
147	/* coro process data */
148	int prio;
149		196
150	/* data associated with this coroutine (initial args) */	197	/* data associated with this coroutine (initial args) */
151	AV *args;	198	AV *args;
152	int refcnt;	199	int refcnt;
		200	int flags; /* CF_ flags */
		201
		202	/* optionally saved, might be zero */
		203	AV *defav; /* @_ */
		204	SV *defsv; /* $_ */
		205	SV *errsv; /* $@ */
		206	SV *deffh; /* default filehandle */
		207	SV *irssv; /* $/ */
		208	SV *irssv_sv; /* real $/ cache */
		209
		210	#define VAR(name,type) type name;
		211	# include "state.h"
		212	#undef VAR
		213
		214	/* statistics */
		215	int usecount; /* number of transfers to this coro */
		216
		217	/* coro process data */
		218	int prio;
		219	//SV *throw;
		220
		221	/* async_pool */
		222	SV *saved_deffh;
		223
		224	/* linked list */
		225	struct coro *next, *prev;
		226	HV *hv; /* the perl hash associated with this coro, if any */
153	};	227	};
154		228
155	typedef struct coro *Coro__State;	229	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	230	typedef struct coro *Coro__State_or_hashref;
157		231
		232	/** Coro ********************************************************************/
		233
		234	#define PRIO_MAX 3
		235	#define PRIO_HIGH 1
		236	#define PRIO_NORMAL 0
		237	#define PRIO_LOW -1
		238	#define PRIO_IDLE -3
		239	#define PRIO_MIN -4
		240
		241	/* for Coro.pm */
		242	static SV *coro_current;
		243	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		244	static int coro_nready;
		245	static struct coro *coro_first;
		246
		247	/** lowlevel stuff **********************************************************/
		248
158	static AV *	249	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	250	coro_clone_padlist (pTHX_ CV *cv)
160	{	251	{
161	AV *padlist = CvPADLIST (cv);	252	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	253	AV *newpadlist, *newpad;
163		254
164	newpadlist = newAV ();	255	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	256	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	257	#if PERL_VERSION_ATLEAST (5,9,0)
		258	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		259	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	260	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	261	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	262	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	263	--AvFILLp (padlist);
173		264
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	265	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
218		309
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	310	#define PERL_MAGIC_coro PERL_MAGIC_ext
220		311
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	312	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
222		313
		314	#define CORO_MAGIC(cv) \
		315	SvMAGIC (cv) \
		316	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		317	? SvMAGIC (cv) \
		318	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		319	: 0
		320
		321	static struct coro *
		322	SvSTATE_ (pTHX_ SV *coro)
		323	{
		324	HV *stash;
		325	MAGIC *mg;
		326
		327	if (SvROK (coro))
		328	coro = SvRV (coro);
		329
		330	if (SvTYPE (coro) != SVt_PVHV)
		331	croak ("Coro::State object required");
		332
		333	stash = SvSTASH (coro);
		334	if (stash != coro_stash && stash != coro_state_stash)
		335	{
		336	/* very slow, but rare, check */
		337	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		338	croak ("Coro::State object required");
		339	}
		340
		341	mg = CORO_MAGIC (coro);
		342	return (struct coro *)mg->mg_ptr;
		343	}
		344
		345	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		346
223	/* the next two functions merely cache the padlists */	347	/* the next two functions merely cache the padlists */
224	static void	348	static void
225	get_padlist (pTHX_ CV *cv)	349	get_padlist (pTHX_ CV *cv)
226	{	350	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	351	MAGIC *mg = CORO_MAGIC (cv);
		352	AV *av;
228		353
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	354	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	355	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	356	else
232	{	357	{
233	#if 0	358	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this should work - but it doesn't :( */	359	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	360	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	361	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	362	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	363	SvREFCNT_dec (cp);
239	#else	364	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	365	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	368	}
244		369
245	static void	370	static void
246	put_padlist (pTHX_ CV *cv)	371	put_padlist (pTHX_ CV *cv)
247	{	372	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	373	MAGIC *mg = CORO_MAGIC (cv);
		374	AV *av;
249		375
250	if (!mg)	376	if (!mg)
251	{	377	{
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	378	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	379	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;	380	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();	381	mg->mg_obj = (SV *)newAV ();
256	}	382	}
257		383
258	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	384	av = (AV *)mg->mg_obj;
259	}
260		385
261	#define SB do {	386	if (AvFILLp (av) >= AvMAX (av))
262	#define SE } while (0)	387	av_extend (av, AvMAX (av) + 1);
263		388
264	#define LOAD(state) load_state(aTHX_ (state));	389	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	390	}
266		391
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	392	/** load & save, init *******************************************************/
268		393
269	static void	394	static void
270	load_state(pTHX_ Coro__State c)	395	load_perl (pTHX_ Coro__State c)
271	{	396	{
272	PL_dowarn = c->dowarn;	397	#define VAR(name,type) PL_ ## name = c->name;
273	PL_in_eval = c->in_eval;	398	# include "state.h"
		399	#undef VAR
274		400
275	PL_curstackinfo = c->curstackinfo;	401	GvSV (PL_defgv) = c->defsv;
276	PL_curstack = c->curstack;	402	GvAV (PL_defgv) = c->defav;
277	PL_mainstack = c->mainstack;	403	GvSV (PL_errgv) = c->errsv;
278	PL_stack_sp = c->stack_sp;	404	GvSV (irsgv) = c->irssv_sv;
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	PL_top_env = c->top_env;
306
307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
309	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
310		405
311	{	406	{
312	dSP;	407	dSP;
313	CV *cv;	408	CV *cv;
314		409
315	/* now do the ugly restore mess */	410	/* now do the ugly restore mess */
316	while ((cv = (CV *)POPs))	411	while ((cv = (CV *)POPs))
317	{	412	{
318	AV *padlist = (AV *)POPs;
319
320	if (padlist)
321	{
322	put_padlist (aTHX_ cv); /* mark this padlist as available */	413	put_padlist (aTHX_ cv); /* mark this padlist as available */
323	CvPADLIST(cv) = padlist;	414	CvDEPTH (cv) = PTR2IV (POPs);
324	}	415	CvPADLIST (cv) = (AV *)POPs;
325
326	++CvDEPTH(cv);
327	}	416	}
328		417
329	PUTBACK;	418	PUTBACK;
330	}	419	}
331	}	420	}
332		421
333	static void	422	static void
334	save_state(pTHX_ Coro__State c, int flags)	423	save_perl (pTHX_ Coro__State c)
335	{	424	{
336	{	425	{
337	dSP;	426	dSP;
338	I32 cxix = cxstack_ix;	427	I32 cxix = cxstack_ix;
339	PERL_CONTEXT *ccstk = cxstack;	428	PERL_CONTEXT *ccstk = cxstack;
…		…
342	/*	431	/*
343	* the worst thing you can imagine happens first - we have to save	432	* the worst thing you can imagine happens first - we have to save
344	* (and reinitialize) all cv's in the whole callchain :(	433	* (and reinitialize) all cv's in the whole callchain :(
345	*/	434	*/
346		435
347	PUSHs (Nullsv);	436	XPUSHs (Nullsv);
348	/* this loop was inspired by pp_caller */	437	/* this loop was inspired by pp_caller */
349	for (;;)	438	for (;;)
350	{	439	{
351	while (cxix >= 0)	440	while (cxix >= 0)
352	{	441	{
353	PERL_CONTEXT *cx = &ccstk[cxix--];	442	PERL_CONTEXT *cx = &ccstk[cxix--];
354		443
355	if (CxTYPE(cx) == CXt_SUB)	444	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
356	{	445	{
357	CV *cv = cx->blk_sub.cv;	446	CV *cv = cx->blk_sub.cv;
		447
358	if (CvDEPTH(cv))	448	if (CvDEPTH (cv))
359	{	449	{
360	EXTEND (SP, CvDEPTH(cv)*2);	450	EXTEND (SP, 3);
361
362	while (--CvDEPTH(cv))
363	{
364	/* this tells the restore code to increment CvDEPTH */
365	PUSHs (Nullsv);
366	PUSHs ((SV *)cv);
367	}
368
369	PUSHs ((SV *)CvPADLIST(cv));	451	PUSHs ((SV *)CvPADLIST (cv));
		452	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
370	PUSHs ((SV *)cv);	453	PUSHs ((SV *)cv);
371		454
		455	CvDEPTH (cv) = 0;
372	get_padlist (aTHX_ cv);	456	get_padlist (aTHX_ cv);
373	}	457	}
374	}	458	}
375	#ifdef CXt_FORMAT
376	else if (CxTYPE(cx) == CXt_FORMAT)
377	{
378	/* I never used formats, so how should I know how these are implemented? */
379	/* my bold guess is as a simple, plain sub... */
380	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381	}
382	#endif
383	}	459	}
384		460
385	if (top_si->si_type == PERLSI_MAIN)	461	if (top_si->si_type == PERLSI_MAIN)
386	break;	462	break;
387		463
388	top_si = top_si->si_prev;	464	top_si = top_si->si_prev;
389	ccstk = top_si->si_cxstack;	465	ccstk = top_si->si_cxstack;
390	cxix = top_si->si_cxix;	466	cxix = top_si->si_cxix;
391	}	467	}
392		468
393	PUTBACK;	469	PUTBACK;
394	}	470	}
395		471
396	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	472	c->defav = GvAV (PL_defgv);
397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	473	c->defsv = DEFSV;
398	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	474	c->errsv = ERRSV;
		475	c->irssv_sv = GvSV (irsgv);
399		476
400	c->dowarn = PL_dowarn;	477	#define VAR(name,type)c->name = PL_ ## name;
401	c->in_eval = PL_in_eval;	478	# include "state.h"
402		479	#undef VAR
403	c->curstackinfo = PL_curstackinfo;
404	c->curstack = PL_curstack;
405	c->mainstack = PL_mainstack;
406	c->stack_sp = PL_stack_sp;
407	c->op = PL_op;
408	c->curpad = PL_curpad;
409	c->comppad = PL_comppad;
410	c->compcv = PL_compcv;
411	c->stack_base = PL_stack_base;
412	c->stack_max = PL_stack_max;
413	c->tmps_stack = PL_tmps_stack;
414	c->tmps_floor = PL_tmps_floor;
415	c->tmps_ix = PL_tmps_ix;
416	c->tmps_max = PL_tmps_max;
417	c->markstack = PL_markstack;
418	c->markstack_ptr = PL_markstack_ptr;
419	c->markstack_max = PL_markstack_max;
420	c->scopestack = PL_scopestack;
421	c->scopestack_ix = PL_scopestack_ix;
422	c->scopestack_max = PL_scopestack_max;
423	c->savestack = PL_savestack;
424	c->savestack_ix = PL_savestack_ix;
425	c->savestack_max = PL_savestack_max;
426	#if PERL_VERSION < 9
427	c->retstack = PL_retstack;
428	c->retstack_ix = PL_retstack_ix;
429	c->retstack_max = PL_retstack_max;
430	#endif
431	c->curpm = PL_curpm;
432	c->curcop = PL_curcop;
433	c->top_env = PL_top_env;
434	}	480	}
435		481
436	/*	482	/*
437	* allocate various perl stacks. This is an exact copy	483	* allocate various perl stacks. This is an exact copy
438	* of perl.c:init_stacks, except that it uses less memory	484	* of perl.c:init_stacks, except that it uses less memory
439	* on the (sometimes correct) assumption that coroutines do	485	* on the (sometimes correct) assumption that coroutines do
440	* not usually need a lot of stackspace.	486	* not usually need a lot of stackspace.
441	*/	487	*/
		488	#if CORO_PREFER_PERL_FUNCTIONS
		489	# define coro_init_stacks init_stacks
		490	#else
442	static void	491	static void
443	coro_init_stacks (pTHX)	492	coro_init_stacks (pTHX)
444	{	493	{
445	LOCK;	494	PL_curstackinfo = new_stackinfo(64, 6);
446
447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
448	PL_curstackinfo->si_type = PERLSI_MAIN;	495	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	496	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	497	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		498
452	PL_stack_base = AvARRAY(PL_curstack);	499	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	500	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	501	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		502
456	New(50,PL_tmps_stack,96,SV*);	503	New(50,PL_tmps_stack,64,SV*);
457	PL_tmps_floor = -1;	504	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	505	PL_tmps_ix = -1;
459	PL_tmps_max = 96;	506	PL_tmps_max = 64;
460		507
461	New(54,PL_markstack,16,I32);	508	New(54,PL_markstack,16,I32);
462	PL_markstack_ptr = PL_markstack;	509	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 16;	510	PL_markstack_max = PL_markstack + 16;
464		511
…		…
468		515
469	New(54,PL_scopestack,16,I32);	516	New(54,PL_scopestack,16,I32);
470	PL_scopestack_ix = 0;	517	PL_scopestack_ix = 0;
471	PL_scopestack_max = 16;	518	PL_scopestack_max = 16;
472		519
473	New(54,PL_savestack,96,ANY);	520	New(54,PL_savestack,64,ANY);
474	PL_savestack_ix = 0;	521	PL_savestack_ix = 0;
475	PL_savestack_max = 96;	522	PL_savestack_max = 64;
476		523
477	#if PERL_VERSION < 9	524	#if !PERL_VERSION_ATLEAST (5,9,0)
478	New(54,PL_retstack,8,OP*);	525	New(54,PL_retstack,4,OP*);
479	PL_retstack_ix = 0;	526	PL_retstack_ix = 0;
480	PL_retstack_max = 8;	527	PL_retstack_max = 4;
481	#endif	528	#endif
482
483	UNLOCK;
484	}	529	}
		530	#endif
485		531
486	/*	532	/*
487	* destroy the stacks, the callchain etc...	533	* destroy the stacks, the callchain etc...
488	*/	534	*/
489	static void	535	static void
490	destroy_stacks(pTHX)	536	coro_destroy_stacks (pTHX)
491	{	537	{
492	if (!IN_DESTRUCT)
493	{
494	/* is this ugly, I ask? */
495	LEAVE_SCOPE (0);
496
497	/* sure it is, but more important: is it correct?? :/ */
498	FREETMPS;
499
500	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
501	}
502
503	while (PL_curstackinfo->si_next)	538	while (PL_curstackinfo->si_next)
504	PL_curstackinfo = PL_curstackinfo->si_next;	539	PL_curstackinfo = PL_curstackinfo->si_next;
505		540
506	while (PL_curstackinfo)	541	while (PL_curstackinfo)
507	{	542	{
508	PERL_SI *p = PL_curstackinfo->si_prev;	543	PERL_SI *p = PL_curstackinfo->si_prev;
509		544
510	{ /*D*//*remove*/
511	dSP;
512	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513	PUTBACK; /* possibly superfluous */
514	}
515
516	if (!IN_DESTRUCT)	545	if (!IN_DESTRUCT)
517	{
518	dounwind (-1);/*D*//*remove*/
519	SvREFCNT_dec (PL_curstackinfo->si_stack);	546	SvREFCNT_dec (PL_curstackinfo->si_stack);
520	}
521		547
522	Safefree (PL_curstackinfo->si_cxstack);	548	Safefree (PL_curstackinfo->si_cxstack);
523	Safefree (PL_curstackinfo);	549	Safefree (PL_curstackinfo);
524	PL_curstackinfo = p;	550	PL_curstackinfo = p;
525	}	551	}
526		552
527	Safefree (PL_tmps_stack);	553	Safefree (PL_tmps_stack);
528	Safefree (PL_markstack);	554	Safefree (PL_markstack);
529	Safefree (PL_scopestack);	555	Safefree (PL_scopestack);
530	Safefree (PL_savestack);	556	Safefree (PL_savestack);
531	#if PERL_VERSION < 9	557	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree (PL_retstack);	558	Safefree (PL_retstack);
533	#endif	559	#endif
534	}	560	}
535		561
536	static void	562	static size_t
537	setup_coro (struct coro *coro)	563	coro_rss (pTHX_ struct coro *coro)
		564	{
		565	size_t rss = sizeof (*coro);
		566
		567	if (coro->mainstack)
		568	{
		569	if (coro->flags & CF_RUNNING)
		570	{
		571	#define VAR(name,type)coro->name = PL_ ## name;
		572	# include "state.h"
		573	#undef VAR
		574	}
		575
		576	rss += sizeof (coro->curstackinfo);
		577	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		578	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		579	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		580	rss += coro->tmps_max * sizeof (SV *);
		581	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		582	rss += coro->scopestack_max * sizeof (I32);
		583	rss += coro->savestack_max * sizeof (ANY);
		584
		585	#if !PERL_VERSION_ATLEAST (5,9,0)
		586	rss += coro->retstack_max * sizeof (OP *);
		587	#endif
		588	}
		589
		590	return rss;
		591	}
		592
		593	/** coroutine stack handling ************************************************/
		594
		595	static void
		596	coro_setup (pTHX_ struct coro *coro)
538	{	597	{
539	/*	598	/*
540	* emulate part of the perl startup here.	599	* emulate part of the perl startup here.
541	*/	600	*/
542	dTHX;	601	coro_init_stacks (aTHX);
		602
		603	PL_runops = RUNOPS_DEFAULT;
		604	PL_curcop = &PL_compiling;
		605	PL_in_eval = EVAL_NULL;
		606	PL_comppad = 0;
		607	PL_curpm = 0;
		608	PL_localizing = 0;
		609	PL_dirty = 0;
		610	PL_restartop = 0;
		611
		612	GvSV (PL_defgv) = newSV (0);
		613	GvAV (PL_defgv) = coro->args; coro->args = 0;
		614	GvSV (PL_errgv) = newSV (0);
		615	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		616	PL_rs = newSVsv (GvSV (irsgv));
		617	PL_defoutgv = SvREFCNT_inc (stdoutgv);
		618
		619	{
		620	dSP;
		621	LOGOP myop;
		622
		623	Zero (&myop, 1, LOGOP);
		624	myop.op_next = Nullop;
		625	myop.op_flags = OPf_WANT_VOID;
		626
		627	PUSHMARK (SP);
		628	XPUSHs (av_shift (GvAV (PL_defgv)));
		629	PUTBACK;
		630	PL_op = (OP *)&myop;
		631	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		632	SPAGAIN;
		633	}
		634
		635	ENTER; /* necessary e.g. for dounwind */
		636	}
		637
		638	static void
		639	coro_destroy (pTHX_ struct coro *coro)
		640	{
		641	if (!IN_DESTRUCT)
		642	{
		643	/* restore all saved variables and stuff */
		644	LEAVE_SCOPE (0);
		645	assert (PL_tmps_floor == -1);
		646
		647	/* free all temporaries */
		648	FREETMPS;
		649	assert (PL_tmps_ix == -1);
		650
		651	/* unwind all extra stacks */
		652	POPSTACK_TO (PL_mainstack);
		653
		654	/* unwind main stack */
		655	dounwind (-1);
		656	}
		657
		658	SvREFCNT_dec (GvSV (PL_defgv));
		659	SvREFCNT_dec (GvAV (PL_defgv));
		660	SvREFCNT_dec (GvSV (PL_errgv));
		661	SvREFCNT_dec (PL_defoutgv);
		662	SvREFCNT_dec (PL_rs);
		663	SvREFCNT_dec (GvSV (irsgv));
		664
		665	SvREFCNT_dec (coro->saved_deffh);
		666	//SvREFCNT_dec (coro->throw);
		667
		668	coro_destroy_stacks (aTHX);
		669	}
		670
		671	static void
		672	free_coro_mortal (pTHX)
		673	{
		674	if (coro_mortal)
		675	{
		676	SvREFCNT_dec (coro_mortal);
		677	coro_mortal = 0;
		678	}
		679	}
		680
		681	static int
		682	runops_trace (pTHX)
		683	{
		684	COP *oldcop = 0;
		685	int oldcxix = -2;
		686	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		687	coro_cctx *cctx = coro->cctx;
		688
		689	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		690	{
		691	PERL_ASYNC_CHECK ();
		692
		693	if (cctx->flags & CC_TRACE_ALL)
		694	{
		695	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		696	{
		697	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		698	SV **bot, **top;
		699	AV *av = newAV (); /* return values */
		700	SV **cb;
		701	dSP;
		702
		703	GV *gv = CvGV (cx->blk_sub.cv);
		704	SV *fullname = sv_2mortal (newSV (0));
		705	if (isGV (gv))
		706	gv_efullname3 (fullname, gv, 0);
		707
		708	bot = PL_stack_base + cx->blk_oldsp + 1;
		709	top = cx->blk_gimme == G_ARRAY ? SP + 1
		710	: cx->blk_gimme == G_SCALAR ? bot + 1
		711	: bot;
		712
		713	while (bot < top)
		714	av_push (av, SvREFCNT_inc (*bot++));
		715
		716	PL_runops = RUNOPS_DEFAULT;
		717	ENTER;
		718	SAVETMPS;
		719	EXTEND (SP, 3);
		720	PUSHMARK (SP);
		721	PUSHs (&PL_sv_no);
		722	PUSHs (fullname);
		723	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		724	PUTBACK;
		725	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		726	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		727	SPAGAIN;
		728	FREETMPS;
		729	LEAVE;
		730	PL_runops = runops_trace;
		731	}
		732
		733	if (oldcop != PL_curcop)
		734	{
		735	oldcop = PL_curcop;
		736
		737	if (PL_curcop != &PL_compiling)
		738	{
		739	SV **cb;
		740
		741	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		742	{
		743	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		744
		745	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		746	{
		747	runops_proc_t old_runops = PL_runops;
		748	dSP;
		749	GV *gv = CvGV (cx->blk_sub.cv);
		750	SV *fullname = sv_2mortal (newSV (0));
		751
		752	if (isGV (gv))
		753	gv_efullname3 (fullname, gv, 0);
		754
		755	PL_runops = RUNOPS_DEFAULT;
		756	ENTER;
		757	SAVETMPS;
		758	EXTEND (SP, 3);
		759	PUSHMARK (SP);
		760	PUSHs (&PL_sv_yes);
		761	PUSHs (fullname);
		762	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		763	PUTBACK;
		764	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		765	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		766	SPAGAIN;
		767	FREETMPS;
		768	LEAVE;
		769	PL_runops = runops_trace;
		770	}
		771
		772	oldcxix = cxstack_ix;
		773	}
		774
		775	if (cctx->flags & CC_TRACE_LINE)
		776	{
		777	dSP;
		778
		779	PL_runops = RUNOPS_DEFAULT;
		780	ENTER;
		781	SAVETMPS;
		782	EXTEND (SP, 3);
		783	PL_runops = RUNOPS_DEFAULT;
		784	PUSHMARK (SP);
		785	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		786	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		787	PUTBACK;
		788	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		789	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		790	SPAGAIN;
		791	FREETMPS;
		792	LEAVE;
		793	PL_runops = runops_trace;
		794	}
		795	}
		796	}
		797	}
		798	}
		799
		800	TAINT_NOT;
		801	return 0;
		802	}
		803
		804	/* inject a fake call to Coro::State::_cctx_init into the execution */
		805	/* _cctx_init should be careful, as it could be called at almost any time */
		806	/* during execution of a perl program */
		807	static void NOINLINE
		808	prepare_cctx (pTHX_ coro_cctx *cctx)
		809	{
543	dSP;	810	dSP;
544	UNOP myop;	811	LOGOP myop;
545	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
546		812
547	coro_init_stacks (aTHX);	813	PL_top_env = &PL_start_env;
548	/*PL_curcop = 0;*/
549	/*PL_in_eval = PL_in_eval;*/ /* inherit */
550	SvREFCNT_dec (GvAV (PL_defgv));
551	GvAV (PL_defgv) = coro->args; coro->args = 0;
552		814
553	SPAGAIN;	815	if (cctx->flags & CC_TRACE)
		816	PL_runops = runops_trace;
554		817
555	Zero (&myop, 1, UNOP);	818	Zero (&myop, 1, LOGOP);
556	myop.op_next = Nullop;	819	myop.op_next = PL_op;
557	myop.op_flags = OPf_WANT_VOID;	820	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558		821
		822	PUSHMARK (SP);
		823	EXTEND (SP, 2);
		824	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		825	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		826	PUTBACK;
559	PL_op = (OP *)&myop;	827	PL_op = (OP *)&myop;
560
561	PUSHMARK(SP);
562	XPUSHs (sub_init);
563	PUTBACK;
564	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	828	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565	SPAGAIN;	829	SPAGAIN;
566
567	ENTER; /* necessary e.g. for dounwind */
568	}	830	}
569		831
		832	/*
		833	* this is a _very_ stripped down perl interpreter ;)
		834	*/
570	static void	835	static void
571	transfer_tail ()	836	coro_run (void *arg)
572	{	837	{
573	if (coro_mortal)	838	dTHX;
574	{
575	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;
577	}
578		839
		840	/* coro_run is the alternative tail of transfer(), so unlock here. */
579	UNLOCK;	841	UNLOCK;
580	}
581		842
582	static void	843	/* we now skip the entersub that lead to transfer() */
583	coro_run (void *arg)	844	PL_op = PL_op->op_next;
584	{	845
		846	/* inject a fake subroutine call to cctx_init */
		847	prepare_cctx (aTHX_ (coro_cctx *)arg);
		848
		849	/* somebody or something will hit me for both perl_run and PL_restartop */
		850	PL_restartop = PL_op;
		851	perl_run (PL_curinterp);
		852
585	/*	853	/*
586	* this is a _very_ stripped down perl interpreter ;)	854	* If perl-run returns we assume exit() was being called or the coro
		855	* fell off the end, which seems to be the only valid (non-bug)
		856	* reason for perl_run to return. We try to exit by jumping to the
		857	* bootstrap-time "top" top_env, as we cannot restore the "main"
		858	* coroutine as Coro has no such concept
587	*/	859	*/
588	dTHX;
589
590	transfer_tail ();
591
592	PL_top_env = &PL_start_env;	860	PL_top_env = main_top_env;
593	PL_restartop = PL_op->op_next;	861	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
594	/* somebody will hit me for both perl_run and PL_restart_top */
595	perl_run (aTHX_ PERL_GET_CONTEXT);
596
597	abort ();
598	}	862	}
599		863
600	static coro_stack *	864	static coro_cctx *
601	stack_new ()	865	cctx_new ()
602	{	866	{
603	coro_stack *stack;	867	coro_cctx *cctx;
		868	void *stack_start;
		869	size_t stack_size;
604		870
		871	++cctx_count;
		872
605	New (0, stack, 1, coro_stack);	873	Newz (0, cctx, 1, coro_cctx);
606		874
607	#if HAVE_MMAP	875	#if HAVE_MMAP
608		876
609	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	877	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		878	/* mmap supposedly does allocate-on-write for us */
610	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	879	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
611		880
612	if (stack->sptr == (void *)-1)	881	if (cctx->sptr != (void *)-1)
		882	{
		883	# if CORO_STACKGUARD
		884	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		885	# endif
		886	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		887	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		888	cctx->flags |= CC_MAPPED;
613	{	889	}
		890	else
		891	#endif
		892	{
		893	cctx->ssize = coro_stacksize * (long)sizeof (long);
		894	New (0, cctx->sptr, coro_stacksize, long);
		895
		896	if (!cctx->sptr)
		897	{
614	fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n");	898	perror ("FATAL: unable to allocate stack for coroutine");
615	_exit (EXIT_FAILURE);	899	_exit (EXIT_FAILURE);
616	}	900	}
617		901
618	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	902	stack_start = cctx->sptr;
619		903	stack_size = cctx->ssize;
620	#else
621
622	stack->ssize = STACKSIZE * (long)sizeof (long);
623	New (0, stack->sptr, STACKSIZE, long);
624
625	if (!stack->sptr)
626	{	904	}
627	fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");
628	_exit (EXIT_FAILURE);
629	}
630		905
631	#endif	906	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
632
633	coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize);	907	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
634		908
635	return stack;	909	return cctx;
636	}	910	}
637		911
638	static void	912	static void
639	stack_free (coro_stack *stack)	913	cctx_destroy (coro_cctx *cctx)
640	{	914	{
641	if (!stack || stack == main_stack)	915	if (!cctx)
642	return;	916	return;
643		917
		918	--cctx_count;
		919
		920	#if CORO_USE_VALGRIND
		921	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		922	#endif
		923
644	#if HAVE_MMAP	924	#if HAVE_MMAP
		925	if (cctx->flags & CC_MAPPED)
645	munmap (stack->sptr, stack->ssize);	926	munmap (cctx->sptr, cctx->ssize);
646	#else
647	Safefree (stack->sptr);
648	#endif
649
650	Safefree (stack);
651	}
652
653	static coro_stack *stack_first;
654
655	static void
656	stack_get (struct coro *coro)
657	{
658	if (stack_first)
659	{
660	coro->stack = stack_first;
661	stack_first = stack_first->next;
662	}
663	else	927	else
664	coro->stack = stack_new ();	928	#endif
665	}	929	Safefree (cctx->sptr);
666		930
667	static void	931	Safefree (cctx);
668	stack_put (coro_stack *stack)
669	{
670	stack->next = stack_first;
671	stack_first = stack;
672	}	932	}
673		933
674	/* never call directly, always through the coro_state_transfer global variable */	934	static coro_cctx *
		935	cctx_get (pTHX)
		936	{
		937	while (cctx_first)
		938	{
		939	coro_cctx *cctx = cctx_first;
		940	cctx_first = cctx->next;
		941	--cctx_idle;
		942
		943	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		944	return cctx;
		945
		946	cctx_destroy (cctx);
		947	}
		948
		949	return cctx_new ();
		950	}
		951
675	static void	952	static void
		953	cctx_put (coro_cctx *cctx)
		954	{
		955	/* free another cctx if overlimit */
		956	if (cctx_idle >= MAX_IDLE_CCTX)
		957	{
		958	coro_cctx *first = cctx_first;
		959	cctx_first = first->next;
		960	--cctx_idle;
		961
		962	cctx_destroy (first);
		963	}
		964
		965	++cctx_idle;
		966	cctx->next = cctx_first;
		967	cctx_first = cctx;
		968	}
		969
		970	/** coroutine switching *****************************************************/
		971
		972	static void NOINLINE
		973	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		974	{
		975	if (prev != next)
		976	{
		977	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		978	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		979
		980	if (next->flags & CF_RUNNING)
		981	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		982
		983	if (next->flags & CF_DESTROYED)
		984	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		985
		986	if (PL_lex_state != LEX_NOTPARSING)
		987	croak ("Coro::State::transfer called while parsing, but this is not supported");
		988	}
		989	}
		990
		991	/* always use the TRANSFER macro */
		992	static void NOINLINE
676	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	993	transfer (pTHX_ struct coro *prev, struct coro *next)
677	{	994	{
678	dSTACKLEVEL;	995	dSTACKLEVEL;
679		996
680	/* sometimes transfer is only called to set idle_sp */	997	/* sometimes transfer is only called to set idle_sp */
681	if (!prev->stack->idle_sp)	998	if (!next)
682	prev->stack->idle_sp = stacklevel;	999	{
683		1000	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
684	LOCK;	1001	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
685		1002	}
686	if (prev != next)	1003	else if (prev != next)
687	{	1004	{
688	coro_stack *prev_stack = prev->stack;	1005	coro_cctx *prev__cctx;
689		1006
690	/* possibly "free" the stack */	1007	if (prev->flags & CF_NEW)
691	if (prev_stack->idle_sp == stacklevel)
692	{	1008	{
693	stack_put (prev_stack);	1009	/* create a new empty context */
694	prev->stack = 0;	1010	Newz (0, prev->cctx, 1, coro_cctx);
		1011	prev->flags &= ~CF_NEW;
		1012	prev->flags |= CF_RUNNING;
695	}	1013	}
696		1014
697	if (next->mainstack)	1015	prev->flags &= ~CF_RUNNING;
		1016	next->flags |= CF_RUNNING;
		1017
		1018	LOCK;
		1019
		1020	if (next->flags & CF_NEW)
698	{	1021	{
699	/* coroutine already started */	1022	/* need to start coroutine */
700	SAVE (prev, flags);	1023	next->flags &= ~CF_NEW;
701	LOAD (next);	1024	/* first get rid of the old state */
		1025	save_perl (aTHX_ prev);
		1026	/* setup coroutine call */
		1027	coro_setup (aTHX_ next);
702	}	1028	}
703	else	1029	else
704	{	1030	{
705	/* need to start coroutine */	1031	/* coroutine already started */
706	/* first get rid of the old state */	1032	save_perl (aTHX_ prev);
707	SAVE (prev, -1);	1033	load_perl (aTHX_ next);
708	/* setup coroutine call */
709	setup_coro (next);
710	/* need to change stack from main_stack to real one */
711	next->stack = 0;
712	}	1034	}
713		1035
		1036	prev__cctx = prev->cctx;
		1037
		1038	/* possibly "free" the cctx */
		1039	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
		1040	{
		1041	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1042	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1043
		1044	prev->cctx = 0;
		1045
		1046	cctx_put (prev__cctx);
		1047	}
		1048
		1049	++next->usecount;
		1050
714	if (!next->stack)	1051	if (!next->cctx)
715	stack_get (next);	1052	next->cctx = cctx_get (aTHX);
716		1053
717	if (prev_stack != next->stack)	1054	if (prev__cctx != next->cctx)
		1055	{
		1056	prev__cctx->top_env = PL_top_env;
		1057	PL_top_env = next->cctx->top_env;
718	coro_transfer (&prev_stack->cctx, &next->stack->cctx);	1058	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
719	}	1059	}
720		1060
721	transfer_tail ();	1061	free_coro_mortal (aTHX);
		1062	UNLOCK;
		1063	}
722	}	1064	}
723		1065
724	/* use this function pointer to call the above function */	1066	struct transfer_args
725	/* this is done to increase chances of the compiler not inlining the call */	1067	{
726	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	1068	struct coro *prev, *next;
		1069	};
727		1070
		1071	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1072	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1073
		1074	/** high level stuff ********************************************************/
		1075
728	static void	1076	static int
729	coro_state_destroy (struct coro *coro)	1077	coro_state_destroy (pTHX_ struct coro *coro)
730	{	1078	{
731	if (coro->refcnt--)	1079	if (coro->flags & CF_DESTROYED)
732	return;	1080	return 0;
		1081
		1082	coro->flags |= CF_DESTROYED;
		1083
		1084	if (coro->flags & CF_READY)
		1085	{
		1086	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1087	/* alternative: look through all ready queues and remove the coro */
		1088	LOCK;
		1089	--coro_nready;
		1090	UNLOCK;
		1091	}
		1092	else
		1093	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
733		1094
734	if (coro->mainstack && coro->mainstack != main_mainstack)	1095	if (coro->mainstack && coro->mainstack != main_mainstack)
735	{	1096	{
736	struct coro temp;	1097	struct coro temp;
737		1098
738	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1099	if (coro->flags & CF_RUNNING)
		1100	croak ("FATAL: tried to destroy currently running coroutine");
		1101
		1102	save_perl (aTHX_ &temp);
739	LOAD (aTHX_ coro);	1103	load_perl (aTHX_ coro);
740		1104
741	destroy_stacks (aTHX);	1105	coro_destroy (aTHX_ coro);
742		1106
743	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1107	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
744		1108
745	coro->mainstack = 0;	1109	coro->mainstack = 0;
746	}	1110	}
747		1111
748	stack_free (coro->stack);	1112	cctx_destroy (coro->cctx);
749	SvREFCNT_dec (coro->args);	1113	SvREFCNT_dec (coro->args);
750	Safefree (coro);	1114
		1115	if (coro->next) coro->next->prev = coro->prev;
		1116	if (coro->prev) coro->prev->next = coro->next;
		1117	if (coro == coro_first) coro_first = coro->next;
		1118
		1119	return 1;
751	}	1120	}
752		1121
753	static int	1122	static int
754	coro_state_clear (SV *sv, MAGIC *mg)	1123	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
755	{	1124	{
756	struct coro *coro = (struct coro *)mg->mg_ptr;	1125	struct coro *coro = (struct coro *)mg->mg_ptr;
757	mg->mg_ptr = 0;	1126	mg->mg_ptr = 0;
758		1127
		1128	coro->hv = 0;
		1129
		1130	if (--coro->refcnt < 0)
		1131	{
759	coro_state_destroy (coro);	1132	coro_state_destroy (aTHX_ coro);
		1133	Safefree (coro);
		1134	}
760		1135
761	return 0;	1136	return 0;
762	}	1137	}
763		1138
764	static int	1139	static int
765	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	1140	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
766	{	1141	{
767	struct coro *coro = (struct coro *)mg->mg_ptr;	1142	struct coro *coro = (struct coro *)mg->mg_ptr;
768		1143
769	++coro->refcnt;	1144	++coro->refcnt;
770		1145
771	return 0;	1146	return 0;
772	}	1147	}
773		1148
774	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1149	static MGVTBL coro_state_vtbl = {
		1150	0, 0, 0, 0,
		1151	coro_state_free,
		1152	0,
		1153	#ifdef MGf_DUP
		1154	coro_state_dup,
		1155	#else
		1156	# define MGf_DUP 0
		1157	#endif
		1158	};
775		1159
776	static struct coro *
777	SvSTATE (SV *coro)
778	{
779	HV *stash;
780	MAGIC *mg;
781
782	if (SvROK (coro))
783	coro = SvRV (coro);
784
785	stash = SvSTASH (coro);
786	if (stash != coro_stash && stash != coro_state_stash)
787	{
788	/* very slow, but rare, check */
789	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
790	croak ("Coro::State object required");
791	}
792
793	mg = SvMAGIC (coro);
794	assert (mg->mg_type == PERL_MAGIC_ext);
795	return (struct coro *)mg->mg_ptr;
796	}
797
798	static void	1160	static void
		1161	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1162	{
		1163	ta->prev = SvSTATE (prev_sv);
		1164	ta->next = SvSTATE (next_sv);
		1165	TRANSFER_CHECK (*ta);
		1166	}
		1167
		1168	static void
799	api_transfer (pTHX_ SV *prev, SV *next, int flags)	1169	api_transfer (SV *prev_sv, SV *next_sv)
800	{	1170	{
801	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1171	dTHX;
		1172	struct transfer_args ta;
		1173
		1174	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1175	TRANSFER (ta);
802	}	1176	}
803		1177
804	/** Coro ********************************************************************/	1178	/** Coro ********************************************************************/
805		1179
806	#define PRIO_MAX 3
807	#define PRIO_HIGH 1
808	#define PRIO_NORMAL 0
809	#define PRIO_LOW -1
810	#define PRIO_IDLE -3
811	#define PRIO_MIN -4
812
813	/* for Coro.pm */
814	static GV *coro_current, *coro_idle;
815	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
816	static int coro_nready;
817
818	static void	1180	static void
819	coro_enq (pTHX_ SV *sv)	1181	coro_enq (pTHX_ SV *coro_sv)
820	{	1182	{
821	int prio;
822
823	if (SvTYPE (sv) != SVt_PVHV)
824	croak ("Coro::ready tried to enqueue something that is not a coroutine");
825
826	prio = SvSTATE (sv)->prio;
827
828	av_push (coro_ready [prio - PRIO_MIN], sv);	1183	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
829	coro_nready++;
830	}	1184	}
831		1185
832	static SV *	1186	static SV *
833	coro_deq (pTHX_ int min_prio)	1187	coro_deq (pTHX_ int min_prio)
834	{	1188	{
…		…
838	if (min_prio < 0)	1192	if (min_prio < 0)
839	min_prio = 0;	1193	min_prio = 0;
840		1194
841	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1195	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
842	if (AvFILLp (coro_ready [prio]) >= 0)	1196	if (AvFILLp (coro_ready [prio]) >= 0)
843	{
844	coro_nready--;
845	return av_shift (coro_ready [prio]);	1197	return av_shift (coro_ready [prio]);
846	}
847		1198
848	return 0;	1199	return 0;
849	}	1200	}
850		1201
851	static void	1202	static int
852	api_ready (SV *coro)	1203	api_ready (SV *coro_sv)
853	{	1204	{
854	dTHX;	1205	dTHX;
		1206	struct coro *coro;
855		1207
856	if (SvROK (coro))	1208	if (SvROK (coro_sv))
857	coro = SvRV (coro);	1209	coro_sv = SvRV (coro_sv);
		1210
		1211	coro = SvSTATE (coro_sv);
		1212
		1213	if (coro->flags & CF_READY)
		1214	return 0;
		1215
		1216	coro->flags |= CF_READY;
858		1217
859	LOCK;	1218	LOCK;
860	coro_enq (aTHX_ SvREFCNT_inc (coro));	1219	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1220	++coro_nready;
861	UNLOCK;	1221	UNLOCK;
		1222
		1223	return 1;
		1224	}
		1225
		1226	static int
		1227	api_is_ready (SV *coro_sv)
		1228	{
		1229	dTHX;
		1230	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1231	}
		1232
		1233	static void
		1234	prepare_schedule (pTHX_ struct transfer_args *ta)
		1235	{
		1236	SV *prev_sv, *next_sv;
		1237
		1238	for (;;)
		1239	{
		1240	LOCK;
		1241	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1242
		1243	/* nothing to schedule: call the idle handler */
		1244	if (!next_sv)
		1245	{
		1246	dSP;
		1247	UNLOCK;
		1248
		1249	ENTER;
		1250	SAVETMPS;
		1251
		1252	PUSHMARK (SP);
		1253	PUTBACK;
		1254	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1255
		1256	FREETMPS;
		1257	LEAVE;
		1258	continue;
		1259	}
		1260
		1261	ta->next = SvSTATE (next_sv);
		1262
		1263	/* cannot transfer to destroyed coros, skip and look for next */
		1264	if (ta->next->flags & CF_DESTROYED)
		1265	{
		1266	UNLOCK;
		1267	SvREFCNT_dec (next_sv);
		1268	/* coro_nready is already taken care of by destroy */
		1269	continue;
		1270	}
		1271
		1272	--coro_nready;
		1273	UNLOCK;
		1274	break;
		1275	}
		1276
		1277	/* free this only after the transfer */
		1278	prev_sv = SvRV (coro_current);
		1279	ta->prev = SvSTATE (prev_sv);
		1280	TRANSFER_CHECK (*ta);
		1281	assert (ta->next->flags & CF_READY);
		1282	ta->next->flags &= ~CF_READY;
		1283	SvRV_set (coro_current, next_sv);
		1284
		1285	LOCK;
		1286	free_coro_mortal (aTHX);
		1287	coro_mortal = prev_sv;
		1288	UNLOCK;
		1289	}
		1290
		1291	static void
		1292	prepare_cede (pTHX_ struct transfer_args *ta)
		1293	{
		1294	api_ready (coro_current);
		1295	prepare_schedule (aTHX_ ta);
		1296	}
		1297
		1298	static int
		1299	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1300	{
		1301	if (coro_nready)
		1302	{
		1303	SV *prev = SvRV (coro_current);
		1304	prepare_schedule (aTHX_ ta);
		1305	api_ready (prev);
		1306	return 1;
		1307	}
		1308	else
		1309	return 0;
862	}	1310	}
863		1311
864	static void	1312	static void
865	api_schedule (void)	1313	api_schedule (void)
866	{	1314	{
867	dTHX;	1315	dTHX;
		1316	struct transfer_args ta;
868		1317
869	SV *prev, *next;	1318	prepare_schedule (aTHX_ &ta);
870	SV *current = GvSV (coro_current);	1319	TRANSFER (ta);
871
872	for (;;)
873	{
874	LOCK;
875
876	next = coro_deq (aTHX_ PRIO_MIN);
877
878	if (next)
879	break;
880
881	UNLOCK;
882
883	{
884	dSP;
885
886	ENTER;
887	SAVETMPS;
888
889	PUSHMARK (SP);
890	PUTBACK;
891	call_sv (GvSV (coro_idle), G_DISCARD);
892
893	FREETMPS;
894	LEAVE;
895	}
896	}
897
898	prev = SvRV (current);
899	SvRV (current) = next;
900
901	/* free this only after the transfer */
902	coro_mortal = prev;
903
904	UNLOCK;
905
906	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);
907	}	1320	}
908		1321
909	static int coro_cede_self;
910
911	static void	1322	static int
912	api_cede (void)	1323	api_cede (void)
913	{	1324	{
914	dTHX;	1325	dTHX;
915	SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));	1326	struct transfer_args ta;
916		1327
917	LOCK;	1328	prepare_cede (aTHX_ &ta);
918		1329
919	if (coro_cede_self)	1330	if (ta.prev != ta.next)
920	{	1331	{
921	AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN];	1332	TRANSFER (ta);
922	av_unshift (runqueue, 1);	1333	return 1;
923	av_store (runqueue, 0, current);
924	coro_nready++;
925	coro_cede_self = 0;
926	}	1334	}
927	else	1335	else
928	coro_enq (aTHX_ current);	1336	return 0;
929
930	UNLOCK;
931
932	api_schedule ();
933	}	1337	}
934		1338
		1339	static int
		1340	api_cede_notself (void)
		1341	{
		1342	dTHX;
		1343	struct transfer_args ta;
		1344
		1345	if (prepare_cede_notself (aTHX_ &ta))
		1346	{
		1347	TRANSFER (ta);
		1348	return 1;
		1349	}
		1350	else
		1351	return 0;
		1352	}
		1353
		1354	static void
		1355	api_trace (SV *coro_sv, int flags)
		1356	{
		1357	dTHX;
		1358	struct coro *coro = SvSTATE (coro_sv);
		1359
		1360	if (flags & CC_TRACE)
		1361	{
		1362	if (!coro->cctx)
		1363	coro->cctx = cctx_new ();
		1364	else if (!(coro->cctx->flags & CC_TRACE))
		1365	croak ("cannot enable tracing on coroutine with custom stack");
		1366
		1367	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1368	}
		1369	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1370	{
		1371	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1372
		1373	if (coro->flags & CF_RUNNING)
		1374	PL_runops = RUNOPS_DEFAULT;
		1375	else
		1376	coro->runops = RUNOPS_DEFAULT;
		1377	}
		1378	}
		1379
935	MODULE = Coro::State PACKAGE = Coro::State	1380	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
936		1381
937	PROTOTYPES: DISABLE	1382	PROTOTYPES: DISABLE
938		1383
939	BOOT:	1384	BOOT:
940	{	1385	{
941	#ifdef USE_ITHREADS	1386	#ifdef USE_ITHREADS
942	MUTEX_INIT (&coro_mutex);	1387	MUTEX_INIT (&coro_mutex);
943	#endif	1388	#endif
944	BOOT_PAGESIZE;	1389	BOOT_PAGESIZE;
945		1390
		1391	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1392	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1393
946	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1394	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
947		1395
948	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1396	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
949	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1397	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
950	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1398	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1399	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
951		1400
952	main_mainstack = PL_mainstack;	1401	main_mainstack = PL_mainstack;
		1402	main_top_env = PL_top_env;
		1403
		1404	while (main_top_env->je_prev)
		1405	main_top_env = main_top_env->je_prev;
953		1406
954	coroapi.ver = CORO_API_VERSION;	1407	coroapi.ver = CORO_API_VERSION;
955	coroapi.transfer = api_transfer;	1408	coroapi.transfer = api_transfer;
956
957	Newz (0, main_stack, 1, coro_stack);
958	main_stack->idle_sp = (void *)-1;
959		1409
960	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1410	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
961	}	1411	}
962		1412
963	SV *	1413	SV *
…		…
967	struct coro *coro;	1417	struct coro *coro;
968	HV *hv;	1418	HV *hv;
969	int i;	1419	int i;
970		1420
971	Newz (0, coro, 1, struct coro);	1421	Newz (0, coro, 1, struct coro);
972	coro->args = newAV ();	1422	coro->args = newAV ();
		1423	coro->flags = CF_NEW;
973		1424
		1425	if (coro_first) coro_first->prev = coro;
		1426	coro->next = coro_first;
		1427	coro_first = coro;
		1428
974	hv = newHV ();	1429	coro->hv = hv = newHV ();
975	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1430	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
976	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1431	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
977		1432
978	av_push (coro->args, newSVsv (RETVAL));
979	for (i = 1; i < items; i++)	1433	for (i = 1; i < items; i++)
980	av_push (coro->args, newSVsv (ST (i)));	1434	av_push (coro->args, newSVsv (ST (i)));
981
982	coro->stack = main_stack;
983	/*coro->mainstack = 0; *//*actual work is done inside transfer */
984	/*coro->stack = 0;*/
985	}	1435	}
986	OUTPUT:	1436	OUTPUT:
987	RETVAL	1437	RETVAL
988		1438
		1439	# these not obviously related functions are all rolled into the same xs
		1440	# function to increase chances that they all will call transfer with the same
		1441	# stack offset
989	void	1442	void
990	transfer (prev, next, flags)	1443	_set_stacklevel (...)
991	SV *prev	1444	ALIAS:
992	SV *next	1445	Coro::State::transfer = 1
993	int flags	1446	Coro::schedule = 2
		1447	Coro::cede = 3
		1448	Coro::cede_notself = 4
994	CODE:	1449	CODE:
995	PUTBACK;
996	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);
997	SPAGAIN;
998
999	int
1000	prio (Coro::State coro, int newprio = 0)
1001	ALIAS:
1002	nice = 1
1003	CODE:
1004	{	1450	{
1005	RETVAL = coro->prio;	1451	struct transfer_args ta;
1006		1452
1007	if (items > 1)	1453	switch (ix)
1008	{	1454	{
		1455	case 0:
		1456	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1457	ta.next = 0;
		1458	break;
		1459
		1460	case 1:
1009	if (ix)	1461	if (items != 2)
1010	newprio += coro->prio;	1462	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1011		1463
1012	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1464	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1013	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1465	break;
1014		1466
1015	coro->prio = newprio;	1467	case 2:
		1468	prepare_schedule (aTHX_ &ta);
		1469	break;
		1470
		1471	case 3:
		1472	prepare_cede (aTHX_ &ta);
		1473	break;
		1474
		1475	case 4:
		1476	if (!prepare_cede_notself (aTHX_ &ta))
		1477	XSRETURN_EMPTY;
		1478
		1479	break;
1016	}	1480	}
1017	}
1018		1481
1019	void	1482	BARRIER;
1020	_clear_idle_sp (Coro::State self)	1483	TRANSFER (ta);
		1484
		1485	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1486	XSRETURN_YES;
		1487	}
		1488
		1489	bool
		1490	_destroy (SV *coro_sv)
1021	CODE:	1491	CODE:
1022	self->stack->idle_sp = 0;	1492	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
1023		1493	OUTPUT:
1024	void	1494	RETVAL
1025	_clone_state_from (SV *dst, SV *src)
1026	CODE:
1027	{
1028	struct coro *coro_src = SvSTATE (src);
1029
1030	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1031
1032	++coro_src->refcnt;
1033	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1034	}
1035		1495
1036	void	1496	void
1037	_exit (code)	1497	_exit (code)
1038	int code	1498	int code
1039	PROTOTYPE: $	1499	PROTOTYPE: $
1040	CODE:	1500	CODE:
1041	_exit (code);	1501	_exit (code);
1042		1502
1043	MODULE = Coro::State PACKAGE = Coro::Cont	1503	int
		1504	cctx_stacksize (int new_stacksize = 0)
		1505	CODE:
		1506	RETVAL = coro_stacksize;
		1507	if (new_stacksize)
		1508	coro_stacksize = new_stacksize;
		1509	OUTPUT:
		1510	RETVAL
		1511
		1512	int
		1513	cctx_count ()
		1514	CODE:
		1515	RETVAL = cctx_count;
		1516	OUTPUT:
		1517	RETVAL
		1518
		1519	int
		1520	cctx_idle ()
		1521	CODE:
		1522	RETVAL = cctx_idle;
		1523	OUTPUT:
		1524	RETVAL
1044		1525
1045	void	1526	void
1046	yield (...)	1527	list ()
1047	PROTOTYPE: @	1528	PPCODE:
		1529	{
		1530	struct coro *coro;
		1531	for (coro = coro_first; coro; coro = coro->next)
		1532	if (coro->hv)
		1533	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1534	}
		1535
		1536	void
		1537	call (Coro::State coro, SV *coderef)
		1538	ALIAS:
		1539	eval = 1
		1540	CODE:
		1541	{
		1542	if (coro->mainstack)
		1543	{
		1544	struct coro temp;
		1545	Zero (&temp, 1, struct coro);
		1546
		1547	if (!(coro->flags & CF_RUNNING))
		1548	{
		1549	save_perl (aTHX_ &temp);
		1550	load_perl (aTHX_ coro);
		1551	}
		1552
		1553	{
		1554	dSP;
		1555	ENTER;
		1556	SAVETMPS;
		1557	PUSHMARK (SP);
		1558	PUTBACK;
		1559	if (ix)
		1560	eval_sv (coderef, 0);
		1561	else
		1562	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1563	SPAGAIN;
		1564	FREETMPS;
		1565	LEAVE;
		1566	PUTBACK;
		1567	}
		1568
		1569	if (!(coro->flags & CF_RUNNING))
		1570	{
		1571	save_perl (aTHX_ coro);
		1572	load_perl (aTHX_ &temp);
		1573	}
		1574	}
		1575	}
		1576
		1577	SV *
		1578	is_ready (Coro::State coro)
		1579	PROTOTYPE: $
		1580	ALIAS:
		1581	is_ready = CF_READY
		1582	is_running = CF_RUNNING
		1583	is_new = CF_NEW
		1584	is_destroyed = CF_DESTROYED
		1585	CODE:
		1586	RETVAL = boolSV (coro->flags & ix);
		1587	OUTPUT:
		1588	RETVAL
		1589
		1590	void
		1591	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1592
		1593	SV *
		1594	has_stack (Coro::State coro)
		1595	PROTOTYPE: $
		1596	CODE:
		1597	RETVAL = boolSV (!!coro->cctx);
		1598	OUTPUT:
		1599	RETVAL
		1600
		1601	int
		1602	is_traced (Coro::State coro)
		1603	PROTOTYPE: $
		1604	CODE:
		1605	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1606	OUTPUT:
		1607	RETVAL
		1608
		1609	IV
		1610	rss (Coro::State coro)
		1611	PROTOTYPE: $
		1612	ALIAS:
		1613	usecount = 1
1048	CODE:	1614	CODE:
1049	{	1615	switch (ix)
1050	SV *yieldstack;	1616	{
1051	SV *sv;	1617	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1052	AV *defav = GvAV (PL_defgv);	1618	case 1: RETVAL = coro->usecount; break;
1053	struct coro *prev, *next;
1054
1055	yieldstack = *hv_fetch (
1056	(HV *)SvRV (GvSV (coro_current)),
1057	"yieldstack", sizeof ("yieldstack") - 1,
1058	0	1619	}
1059	);	1620	OUTPUT:
		1621	RETVAL
1060		1622
1061	/* set up @_ -- ugly */
1062	av_clear (defav);
1063	av_fill (defav, items - 1);
1064	while (items--)
1065	av_store (defav, items, SvREFCNT_inc (ST(items)));
1066
1067	sv = av_pop ((AV *)SvRV (yieldstack));
1068	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1069	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1070	SvREFCNT_dec (sv);
1071
1072	coro_state_transfer (aTHX_ prev, next, 0);
1073	}
1074		1623
1075	MODULE = Coro::State PACKAGE = Coro	1624	MODULE = Coro::State PACKAGE = Coro
1076		1625
1077	BOOT:	1626	BOOT:
1078	{	1627	{
1079	int i;	1628	int i;
		1629
		1630	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1631	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1632	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1633
		1634	coro_current = get_sv ("Coro::current", FALSE);
		1635	SvREADONLY_on (coro_current);
1080		1636
1081	coro_stash = gv_stashpv ("Coro", TRUE);	1637	coro_stash = gv_stashpv ("Coro", TRUE);
1082		1638
1083	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1639	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1084	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1640	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1085	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1641	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1086	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1642	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1087	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1643	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1088	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1644	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1089		1645
1090	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1091	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1092
1093	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1646	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1094	coro_ready[i] = newAV ();	1647	coro_ready[i] = newAV ();
1095		1648
1096	{	1649	{
1097	SV *sv = perl_get_sv("Coro::API", 1);	1650	SV *sv = perl_get_sv("Coro::API", 1);
1098		1651
1099	coroapi.schedule = api_schedule;	1652	coroapi.schedule = api_schedule;
1100	coroapi.cede = api_cede;	1653	coroapi.cede = api_cede;
		1654	coroapi.cede_notself = api_cede_notself;
1101	coroapi.ready = api_ready;	1655	coroapi.ready = api_ready;
		1656	coroapi.is_ready = api_is_ready;
1102	coroapi.nready = &coro_nready;	1657	coroapi.nready = &coro_nready;
1103	coroapi.current = coro_current;	1658	coroapi.current = coro_current;
1104		1659
1105	GCoroAPI = &coroapi;	1660	GCoroAPI = &coroapi;
1106	sv_setiv (sv, (IV)&coroapi);	1661	sv_setiv (sv, (IV)&coroapi);
1107	SvREADONLY_on (sv);	1662	SvREADONLY_on (sv);
1108	}	1663	}
1109	}	1664	}
1110		1665
1111	void	1666	void
		1667	_set_current (SV *current)
		1668	PROTOTYPE: $
		1669	CODE:
		1670	SvREFCNT_dec (SvRV (coro_current));
		1671	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1672
		1673	int
		1674	prio (Coro::State coro, int newprio = 0)
		1675	ALIAS:
		1676	nice = 1
		1677	CODE:
		1678	{
		1679	RETVAL = coro->prio;
		1680
		1681	if (items > 1)
		1682	{
		1683	if (ix)
		1684	newprio = coro->prio - newprio;
		1685
		1686	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1687	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1688
		1689	coro->prio = newprio;
		1690	}
		1691	}
		1692	OUTPUT:
		1693	RETVAL
		1694
		1695	SV *
1112	ready (SV *self)	1696	ready (SV *self)
1113	PROTOTYPE: $	1697	PROTOTYPE: $
1114	CODE:	1698	CODE:
1115	api_ready (self);	1699	RETVAL = boolSV (api_ready (self));
		1700	OUTPUT:
		1701	RETVAL
1116		1702
1117	int	1703	int
1118	nready (...)	1704	nready (...)
1119	PROTOTYPE:	1705	PROTOTYPE:
1120	CODE:	1706	CODE:
1121	RETVAL = coro_nready;	1707	RETVAL = coro_nready;
1122	OUTPUT:	1708	OUTPUT:
1123	RETVAL	1709	RETVAL
1124		1710
		1711	# for async_pool speedup
1125	void	1712	void
1126	schedule (...)	1713	_pool_1 (SV *cb)
1127	PROTOTYPE:
1128	CODE:	1714	CODE:
1129	api_schedule ();	1715	{
		1716	struct coro *coro = SvSTATE (coro_current);
		1717	HV *hv = (HV *)SvRV (coro_current);
		1718	AV *defav = GvAV (PL_defgv);
		1719	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1720	AV *invoke_av;
		1721	int i, len;
		1722
		1723	if (!invoke)
		1724	croak ("\3terminate\2\n");
		1725
		1726	SvREFCNT_dec (coro->saved_deffh);
		1727	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1728
		1729	hv_store (hv, "desc", sizeof ("desc") - 1,
		1730	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1731
		1732	invoke_av = (AV *)SvRV (invoke);
		1733	len = av_len (invoke_av);
		1734
		1735	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1736
		1737	if (len > 0)
		1738	{
		1739	av_fill (defav, len - 1);
		1740	for (i = 0; i < len; ++i)
		1741	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1742	}
		1743
		1744	SvREFCNT_dec (invoke);
		1745	}
1130		1746
1131	void	1747	void
1132	_set_cede_self ()	1748	_pool_2 (SV *cb)
1133	CODE:	1749	CODE:
1134	coro_cede_self = 1;	1750	{
		1751	struct coro *coro = SvSTATE (coro_current);
1135		1752
1136	void	1753	sv_setsv (cb, &PL_sv_undef);
1137	cede (...)	1754
1138	PROTOTYPE:	1755	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1139	CODE:	1756	coro->saved_deffh = 0;
1140	api_cede ();	1757
		1758	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1759	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1760	croak ("\3terminate\2\n");
		1761
		1762	av_clear (GvAV (PL_defgv));
		1763	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1764	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1765
		1766	coro->prio = 0;
		1767
		1768	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1769	api_trace (coro_current, 0);
		1770
		1771	av_push (av_async_pool, newSVsv (coro_current));
		1772	}
		1773
1141		1774
1142	MODULE = Coro::State PACKAGE = Coro::AIO	1775	MODULE = Coro::State PACKAGE = Coro::AIO
1143		1776
1144	SV *	1777	SV *
1145	_get_state ()	1778	_get_state ()
1146	CODE:	1779	CODE:
1147	{	1780	{
1148	struct {	1781	struct io_state *data;
1149	int errorno;
1150	int laststype;
1151	int laststatval;
1152	Stat_t statcache;
1153	} data;
1154		1782
		1783	RETVAL = newSV (sizeof (struct io_state));
		1784	data = (struct io_state *)SvPVX (RETVAL);
		1785	SvCUR_set (RETVAL, sizeof (struct io_state));
		1786	SvPOK_only (RETVAL);
		1787
1155	data.errorno = errno;	1788	data->errorno = errno;
1156	data.laststype = PL_laststype;	1789	data->laststype = PL_laststype;
1157	data.laststatval = PL_laststatval;	1790	data->laststatval = PL_laststatval;
1158	data.statcache = PL_statcache;	1791	data->statcache = PL_statcache;
1159
1160	RETVAL = newSVpvn ((char *)&data, sizeof data);
1161	}	1792	}
1162	OUTPUT:	1793	OUTPUT:
1163	RETVAL	1794	RETVAL
1164		1795
1165	void	1796	void
1166	_set_state (char *data_)	1797	_set_state (char *data_)
1167	PROTOTYPE: $	1798	PROTOTYPE: $
1168	CODE:	1799	CODE:
1169	{	1800	{
1170	struct {	1801	struct io_state *data = (void *)data_;
1171	int errorno;
1172	int laststype;
1173	int laststatval;
1174	Stat_t statcache;
1175	} *data = (void *)data_;
1176		1802
1177	errno = data->errorno;	1803	errno = data->errorno;
1178	PL_laststype = data->laststype;	1804	PL_laststype = data->laststype;
1179	PL_laststatval = data->laststatval;	1805	PL_laststatval = data->laststatval;
1180	PL_statcache = data->statcache;	1806	PL_statcache = data->statcache;
1181	}	1807	}
		1808

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