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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.81 by root, Fri Nov 3 00:56:03 2006 UTC vs.
Revision 1.186 by root, Fri Oct 5 20:10:42 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PERL_VERSION < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <errno.h>	75	/* 5.8.7 */
		76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
33		79
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	81	# undef CORO_STACKGUARD
36	#endif
37
38	#ifndef STACKGUARD
39	# define STACKGUARD 0
40	#endif
41
42	#ifdef HAVE_MMAP
43	# include <unistd.h>
44	# include <sys/mman.h>
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	82	#endif
52	# include <limits.h>	83
53	# ifndef PAGESIZE	84	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	85	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	86	#endif
60	#endif
61		87
62	#define SUB_INIT "Coro::State::initialize"	88	/* prefer perl internal functions over our own? */
63	#define UCORO_STATE "_coro_state"	89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
64		92
65	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macros try to return the current stack pointer, in an as
66	* to the current C stack pointer. Its property is that it changes with each call	94	* portable way as possible. */
67	* and should be unique. */	95	#define dSTACKLEVEL volatile char stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
69		97
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		99
72	#define labs(l) ((l) >= 0 ? (l) : -(l))	100	#if __GNUC__ >= 3
		101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		103	#else
		104	# define attribute(x)
		105	# define BARRIER
		106	#endif
		107
		108	#define NOINLINE attribute ((noinline))
73		109
74	#include "CoroAPI.h"	110	#include "CoroAPI.h"
75		111
76	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
…		…
80	#else	116	#else
81	# define LOCK (void)0	117	# define LOCK (void)0
82	# define UNLOCK (void)0	118	# define UNLOCK (void)0
83	#endif	119	#endif
84		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
85	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
86	static AV *main_mainstack; /* used to differentiate between $main and others */	132	static AV *main_mainstack; /* used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
87	static HV *coro_state_stash;	134	static HV *coro_state_stash, *coro_stash;
88	static SV *ucoro_state_sv;
89	static U32 ucoro_state_hash;
90	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
91		136
92	/* this is actually not only the c stack but also c registers etc... */	137	static GV *irsgv; /* $/ */
		138
		139	/* async_pool helper stuff */
		140	static SV *sv_pool_rss;
		141	static SV *sv_pool_size;
		142	static AV *av_async_pool;
		143
		144	static struct coro_cctx *cctx_first;
		145	static int cctx_count, cctx_idle;
		146
		147	enum {
		148	CC_MAPPED = 0x01,
		149	CC_NOREUSE = 0x02, /* throw this away after tracing */
		150	CC_TRACE = 0x04,
		151	CC_TRACE_SUB = 0x08, /* trace sub calls */
		152	CC_TRACE_LINE = 0x10, /* trace each statement */
		153	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		154	};
		155
		156	/* this is a structure representing a c-level coroutine */
93	typedef struct {	157	typedef struct coro_cctx {
94	int refcnt; /* pointer reference counter */	158	struct coro_cctx *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		159
		160	/* the stack */
		161	void *sptr;
		162	size_t ssize;
		163
		164	/* cpu state */
		165	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		166	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		167	JMPENV *top_env;
98	coro_context cctx;	168	coro_context cctx;
99		169
100	void *sptr;	170	#if CORO_USE_VALGRIND
101	long ssize; /* positive == mmap, otherwise malloc */	171	int valgrind_id;
102	} coro_stack;	172	#endif
		173	unsigned char flags;
		174	} coro_cctx;
103		175
		176	enum {
		177	CF_RUNNING = 0x0001, /* coroutine is running */
		178	CF_READY = 0x0002, /* coroutine is ready */
		179	CF_NEW = 0x0004, /* has never been switched to */
		180	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		181	};
		182
		183	/* this is a structure representing a perl-level coroutine */
104	struct coro {	184	struct coro {
105	/* the optional C context */	185	/* the c coroutine allocated to this perl coroutine, if any */
106	coro_stack *stack;	186	coro_cctx *cctx;
107	void *cursp;
108	int gencnt;
109
110	/* optionally saved, might be zero */
111	AV *defav;
112	SV *defsv;
113	SV *errsv;
114
115	/* saved global state not related to stacks */
116	U8 dowarn;
117	I32 in_eval;
118
119	/* the stacks and related info (callchain etc..) */
120	PERL_SI *curstackinfo;
121	AV *curstack;
122	AV *mainstack;
123	SV **stack_sp;
124	OP *op;
125	SV **curpad;
126	AV *comppad;
127	CV *compcv;
128	SV **stack_base;
129	SV **stack_max;
130	SV **tmps_stack;
131	I32 tmps_floor;
132	I32 tmps_ix;
133	I32 tmps_max;
134	I32 *markstack;
135	I32 *markstack_ptr;
136	I32 *markstack_max;
137	I32 *scopestack;
138	I32 scopestack_ix;
139	I32 scopestack_max;
140	ANY *savestack;
141	I32 savestack_ix;
142	I32 savestack_max;
143	OP **retstack;
144	I32 retstack_ix;
145	I32 retstack_max;
146	PMOP *curpm;
147	COP *curcop;
148	JMPENV *top_env;
149		187
150	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
151	AV *args;	189	AV *args;
		190	int refcnt;
		191	int flags; /* CF_ flags */
		192
		193	/* optionally saved, might be zero */
		194	AV *defav; /* @_ */
		195	SV *defsv; /* $_ */
		196	SV *errsv; /* $@ */
		197	SV *deffh; /* default filehandle */
		198	SV *irssv; /* $/ */
		199	SV *irssv_sv; /* real $/ cache */
		200
		201	#define VAR(name,type) type name;
		202	# include "state.h"
		203	#undef VAR
		204
		205	/* statistics */
		206	int usecount; /* number of transfers to this coro */
		207
		208	/* coro process data */
		209	int prio;
		210	//SV *throw;
		211
		212	/* async_pool */
		213	SV *saved_deffh;
		214
		215	/* linked list */
		216	struct coro *next, *prev;
		217	HV *hv; /* the perl hash associated with this coro, if any */
152	};	218	};
153		219
154	typedef struct coro *Coro__State;	220	typedef struct coro *Coro__State;
155	typedef struct coro *Coro__State_or_hashref;	221	typedef struct coro *Coro__State_or_hashref;
156		222
		223	/** Coro ********************************************************************/
		224
		225	#define PRIO_MAX 3
		226	#define PRIO_HIGH 1
		227	#define PRIO_NORMAL 0
		228	#define PRIO_LOW -1
		229	#define PRIO_IDLE -3
		230	#define PRIO_MIN -4
		231
		232	/* for Coro.pm */
		233	static SV *coro_current;
		234	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		235	static int coro_nready;
		236	static struct coro *coro_first;
		237
		238	/** lowlevel stuff **********************************************************/
		239
157	static AV *	240	static AV *
158	coro_clone_padlist (pTHX_ CV *cv)	241	coro_clone_padlist (pTHX_ CV *cv)
159	{	242	{
160	AV *padlist = CvPADLIST (cv);	243	AV *padlist = CvPADLIST (cv);
161	AV *newpadlist, *newpad;	244	AV *newpadlist, *newpad;
162		245
163	newpadlist = newAV ();	246	newpadlist = newAV ();
164	AvREAL_off (newpadlist);	247	AvREAL_off (newpadlist);
165	#if PERL_VERSION < 9	248	#if PERL_VERSION_ATLEAST (5,9,0)
		249	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		250	#else
166	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	251	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
167	#else
168	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
169	#endif	252	#endif
170	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	253	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
171	--AvFILLp (padlist);	254	--AvFILLp (padlist);
172		255
173	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	256	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
217		300
218	#define PERL_MAGIC_coro PERL_MAGIC_ext	301	#define PERL_MAGIC_coro PERL_MAGIC_ext
219		302
220	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	303	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
221		304
		305	#define CORO_MAGIC(cv) \
		306	SvMAGIC (cv) \
		307	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		308	? SvMAGIC (cv) \
		309	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		310	: 0
		311
		312	static struct coro *
		313	SvSTATE_ (pTHX_ SV *coro)
		314	{
		315	HV *stash;
		316	MAGIC *mg;
		317
		318	if (SvROK (coro))
		319	coro = SvRV (coro);
		320
		321	if (SvTYPE (coro) != SVt_PVHV)
		322	croak ("Coro::State object required");
		323
		324	stash = SvSTASH (coro);
		325	if (stash != coro_stash && stash != coro_state_stash)
		326	{
		327	/* very slow, but rare, check */
		328	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		329	croak ("Coro::State object required");
		330	}
		331
		332	mg = CORO_MAGIC (coro);
		333	return (struct coro *)mg->mg_ptr;
		334	}
		335
		336	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		337
222	/* the next two functions merely cache the padlists */	338	/* the next two functions merely cache the padlists */
223	static void	339	static void
224	get_padlist (pTHX_ CV *cv)	340	get_padlist (pTHX_ CV *cv)
225	{	341	{
226	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	342	MAGIC *mg = CORO_MAGIC (cv);
		343	AV *av;
227		344
228	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	345	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
229	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	346	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
230	else	347	else
231	{	348	{
232	#if 0	349	#if CORO_PREFER_PERL_FUNCTIONS
233	/* this should work - but it doesn't :( */	350	/* this is probably cleaner, but also slower? */
234	CV *cp = Perl_cv_clone (aTHX_ cv);	351	CV *cp = Perl_cv_clone (cv);
235	CvPADLIST (cv) = CvPADLIST (cp);	352	CvPADLIST (cv) = CvPADLIST (cp);
236	CvPADLIST (cp) = 0;	353	CvPADLIST (cp) = 0;
237	SvREFCNT_dec (cp);	354	SvREFCNT_dec (cp);
238	#else	355	#else
239	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	356	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
242	}	359	}
243		360
244	static void	361	static void
245	put_padlist (pTHX_ CV *cv)	362	put_padlist (pTHX_ CV *cv)
246	{	363	{
247	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	364	MAGIC *mg = CORO_MAGIC (cv);
		365	AV *av;
248		366
249	if (!mg)	367	if (!mg)
250	{	368	{
251	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	369	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
252	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	370	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
253	mg->mg_virtual = &vtbl_coro;	371	mg->mg_virtual = &vtbl_coro;
254	mg->mg_obj = (SV *)newAV ();	372	mg->mg_obj = (SV *)newAV ();
255	}	373	}
256		374
257	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	375	av = (AV *)mg->mg_obj;
258	}
259		376
260	#define SB do {	377	if (AvFILLp (av) >= AvMAX (av))
261	#define SE } while (0)	378	av_extend (av, AvMAX (av) + 1);
262		379
263	#define LOAD(state) load_state(aTHX_ (state));	380	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
264	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	381	}
265		382
266	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	383	/** load & save, init *******************************************************/
267		384
268	static void	385	static void
269	load_state(pTHX_ Coro__State c)	386	load_perl (pTHX_ Coro__State c)
270	{	387	{
271	PL_dowarn = c->dowarn;	388	#define VAR(name,type) PL_ ## name = c->name;
272	PL_in_eval = c->in_eval;	389	# include "state.h"
		390	#undef VAR
273		391
274	PL_curstackinfo = c->curstackinfo;	392	GvSV (PL_defgv) = c->defsv;
275	PL_curstack = c->curstack;	393	GvAV (PL_defgv) = c->defav;
276	PL_mainstack = c->mainstack;	394	GvSV (PL_errgv) = c->errsv;
277	PL_stack_sp = c->stack_sp;	395	GvSV (irsgv) = c->irssv_sv;
278	PL_op = c->op;
279	PL_curpad = c->curpad;
280	PL_comppad = c->comppad;
281	PL_compcv = c->compcv;
282	PL_stack_base = c->stack_base;
283	PL_stack_max = c->stack_max;
284	PL_tmps_stack = c->tmps_stack;
285	PL_tmps_floor = c->tmps_floor;
286	PL_tmps_ix = c->tmps_ix;
287	PL_tmps_max = c->tmps_max;
288	PL_markstack = c->markstack;
289	PL_markstack_ptr = c->markstack_ptr;
290	PL_markstack_max = c->markstack_max;
291	PL_scopestack = c->scopestack;
292	PL_scopestack_ix = c->scopestack_ix;
293	PL_scopestack_max = c->scopestack_max;
294	PL_savestack = c->savestack;
295	PL_savestack_ix = c->savestack_ix;
296	PL_savestack_max = c->savestack_max;
297	#if PERL_VERSION < 9
298	PL_retstack = c->retstack;
299	PL_retstack_ix = c->retstack_ix;
300	PL_retstack_max = c->retstack_max;
301	#endif
302	PL_curpm = c->curpm;
303	PL_curcop = c->curcop;
304	PL_top_env = c->top_env;
305
306	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
307	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
308	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
309		396
310	{	397	{
311	dSP;	398	dSP;
312	CV *cv;	399	CV *cv;
313		400
314	/* now do the ugly restore mess */	401	/* now do the ugly restore mess */
315	while ((cv = (CV *)POPs))	402	while ((cv = (CV *)POPs))
316	{	403	{
317	AV *padlist = (AV *)POPs;
318
319	if (padlist)
320	{
321	put_padlist (aTHX_ cv); /* mark this padlist as available */	404	put_padlist (aTHX_ cv); /* mark this padlist as available */
322	CvPADLIST(cv) = padlist;	405	CvDEPTH (cv) = PTR2IV (POPs);
323	}	406	CvPADLIST (cv) = (AV *)POPs;
324
325	++CvDEPTH(cv);
326	}	407	}
327		408
328	PUTBACK;	409	PUTBACK;
329	}	410	}
330	}	411	}
331		412
332	static void	413	static void
333	save_state(pTHX_ Coro__State c, int flags)	414	save_perl (pTHX_ Coro__State c)
334	{	415	{
335	{	416	{
336	dSP;	417	dSP;
337	I32 cxix = cxstack_ix;	418	I32 cxix = cxstack_ix;
338	PERL_CONTEXT *ccstk = cxstack;	419	PERL_CONTEXT *ccstk = cxstack;
…		…
341	/*	422	/*
342	* the worst thing you can imagine happens first - we have to save	423	* the worst thing you can imagine happens first - we have to save
343	* (and reinitialize) all cv's in the whole callchain :(	424	* (and reinitialize) all cv's in the whole callchain :(
344	*/	425	*/
345		426
346	PUSHs (Nullsv);	427	XPUSHs (Nullsv);
347	/* this loop was inspired by pp_caller */	428	/* this loop was inspired by pp_caller */
348	for (;;)	429	for (;;)
349	{	430	{
350	while (cxix >= 0)	431	while (cxix >= 0)
351	{	432	{
352	PERL_CONTEXT *cx = &ccstk[cxix--];	433	PERL_CONTEXT *cx = &ccstk[cxix--];
353		434
354	if (CxTYPE(cx) == CXt_SUB)	435	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
355	{	436	{
356	CV *cv = cx->blk_sub.cv;	437	CV *cv = cx->blk_sub.cv;
		438
357	if (CvDEPTH(cv))	439	if (CvDEPTH (cv))
358	{	440	{
359	EXTEND (SP, CvDEPTH(cv)*2);	441	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));	442	PUSHs ((SV *)CvPADLIST (cv));
		443	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
369	PUSHs ((SV *)cv);	444	PUSHs ((SV *)cv);
370		445
		446	CvDEPTH (cv) = 0;
371	get_padlist (aTHX_ cv);	447	get_padlist (aTHX_ cv);
372	}	448	}
373	}	449	}
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	}	450	}
383		451
384	if (top_si->si_type == PERLSI_MAIN)	452	if (top_si->si_type == PERLSI_MAIN)
385	break;	453	break;
386		454
387	top_si = top_si->si_prev;	455	top_si = top_si->si_prev;
388	ccstk = top_si->si_cxstack;	456	ccstk = top_si->si_cxstack;
389	cxix = top_si->si_cxix;	457	cxix = top_si->si_cxix;
390	}	458	}
391		459
392	PUTBACK;	460	PUTBACK;
393	}	461	}
394		462
395	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	463	c->defav = GvAV (PL_defgv);
396	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	464	c->defsv = DEFSV;
397	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	465	c->errsv = ERRSV;
		466	c->irssv_sv = GvSV (irsgv);
398		467
399	c->dowarn = PL_dowarn;	468	#define VAR(name,type)c->name = PL_ ## name;
400	c->in_eval = PL_in_eval;	469	# include "state.h"
401		470	#undef VAR
402	c->curstackinfo = PL_curstackinfo;
403	c->curstack = PL_curstack;
404	c->mainstack = PL_mainstack;
405	c->stack_sp = PL_stack_sp;
406	c->op = PL_op;
407	c->curpad = PL_curpad;
408	c->comppad = PL_comppad;
409	c->compcv = PL_compcv;
410	c->stack_base = PL_stack_base;
411	c->stack_max = PL_stack_max;
412	c->tmps_stack = PL_tmps_stack;
413	c->tmps_floor = PL_tmps_floor;
414	c->tmps_ix = PL_tmps_ix;
415	c->tmps_max = PL_tmps_max;
416	c->markstack = PL_markstack;
417	c->markstack_ptr = PL_markstack_ptr;
418	c->markstack_max = PL_markstack_max;
419	c->scopestack = PL_scopestack;
420	c->scopestack_ix = PL_scopestack_ix;
421	c->scopestack_max = PL_scopestack_max;
422	c->savestack = PL_savestack;
423	c->savestack_ix = PL_savestack_ix;
424	c->savestack_max = PL_savestack_max;
425	#if PERL_VERSION < 9
426	c->retstack = PL_retstack;
427	c->retstack_ix = PL_retstack_ix;
428	c->retstack_max = PL_retstack_max;
429	#endif
430	c->curpm = PL_curpm;
431	c->curcop = PL_curcop;
432	c->top_env = PL_top_env;
433	}	471	}
434		472
435	/*	473	/*
436	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
437	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
438	* on the (sometimes correct) assumption that coroutines do	476	* on the (sometimes correct) assumption that coroutines do
439	* not usually need a lot of stackspace.	477	* not usually need a lot of stackspace.
440	*/	478	*/
		479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
441	static void	482	static void
442	coro_init_stacks (pTHX)	483	coro_init_stacks (pTHX)
443	{	484	{
444	LOCK;	485	PL_curstackinfo = new_stackinfo(64, 6);
445
446	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
447	PL_curstackinfo->si_type = PERLSI_MAIN;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
448	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
449	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
450		489
451	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
452	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
453	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
454		493
455	New(50,PL_tmps_stack,96,SV*);	494	New(50,PL_tmps_stack,64,SV*);
456	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
457	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
458	PL_tmps_max = 96;	497	PL_tmps_max = 64;
459		498
460	New(54,PL_markstack,16,I32);	499	New(54,PL_markstack,16,I32);
461	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
462	PL_markstack_max = PL_markstack + 16;	501	PL_markstack_max = PL_markstack + 16;
463		502
…		…
467		506
468	New(54,PL_scopestack,16,I32);	507	New(54,PL_scopestack,16,I32);
469	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
470	PL_scopestack_max = 16;	509	PL_scopestack_max = 16;
471		510
472	New(54,PL_savestack,96,ANY);	511	New(54,PL_savestack,64,ANY);
473	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
474	PL_savestack_max = 96;	513	PL_savestack_max = 64;
475		514
476	#if PERL_VERSION < 9	515	#if !PERL_VERSION_ATLEAST (5,9,0)
477	New(54,PL_retstack,8,OP*);	516	New(54,PL_retstack,4,OP*);
478	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
479	PL_retstack_max = 8;	518	PL_retstack_max = 4;
480	#endif	519	#endif
481
482	UNLOCK;
483	}	520	}
		521	#endif
484		522
485	/*	523	/*
486	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
487	*/	525	*/
488	static void	526	static void
489	destroy_stacks(pTHX)	527	coro_destroy_stacks (pTHX)
490	{	528	{
491	if (!IN_DESTRUCT)
492	{
493	/* is this ugly, I ask? */
494	LEAVE_SCOPE (0);
495
496	/* sure it is, but more important: is it correct?? :/ */
497	FREETMPS;
498
499	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
500	}
501
502	while (PL_curstackinfo->si_next)	529	while (PL_curstackinfo->si_next)
503	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
504		531
505	while (PL_curstackinfo)	532	while (PL_curstackinfo)
506	{	533	{
507	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
508		535
509	{ /*D*//*remove*/
510	dSP;
511	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
512	PUTBACK; /* possibly superfluous */
513	}
514
515	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
516	{
517	dounwind (-1);/*D*//*remove*/
518	SvREFCNT_dec (PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
519	}
520		538
521	Safefree (PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
522	Safefree (PL_curstackinfo);	540	Safefree (PL_curstackinfo);
523	PL_curstackinfo = p;	541	PL_curstackinfo = p;
524	}	542	}
525		543
526	Safefree (PL_tmps_stack);	544	Safefree (PL_tmps_stack);
527	Safefree (PL_markstack);	545	Safefree (PL_markstack);
528	Safefree (PL_scopestack);	546	Safefree (PL_scopestack);
529	Safefree (PL_savestack);	547	Safefree (PL_savestack);
530	#if PERL_VERSION < 9	548	#if !PERL_VERSION_ATLEAST (5,9,0)
531	Safefree (PL_retstack);	549	Safefree (PL_retstack);
532	#endif	550	#endif
533	}	551	}
534		552
535	static void	553	static size_t
536	allocate_stack (Coro__State ctx, int alloc)	554	coro_rss (pTHX_ struct coro *coro)
537	{	555	{
538	coro_stack *stack;	556	size_t rss = sizeof (*coro);
539		557
540	New (0, stack, 1, coro_stack);	558	if (coro->mainstack)
541
542	stack->refcnt = 1;
543	stack->usecnt = 1;
544	stack->gencnt = ctx->gencnt = 0;
545
546	if (alloc)
547	{	559	{
548	#if HAVE_MMAP	560	if (coro->flags & CF_RUNNING)
549	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
551	if (stack->sptr != (void *)-1)
552	{	561	{
553	# if STACKGUARD	562	#define VAR(name,type)coro->name = PL_ ## name;
554	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	563	# include "state.h"
555	# endif	564	#undef VAR
556	}	565	}
557	else
558	#endif
559	{
560	stack->ssize = - (STACKSIZE * (long)sizeof (long));
561	New (0, stack->sptr, STACKSIZE, long);
562	}
563	}
564	else
565	stack->sptr = 0;
566		566
567	ctx->stack = stack;	567	rss += sizeof (coro->curstackinfo);
568	}	568	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		569	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		570	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		571	rss += coro->tmps_max * sizeof (SV *);
		572	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		573	rss += coro->scopestack_max * sizeof (I32);
		574	rss += coro->savestack_max * sizeof (ANY);
569		575
570	static void	576	#if !PERL_VERSION_ATLEAST (5,9,0)
571	deallocate_stack (Coro__State ctx)	577	rss += coro->retstack_max * sizeof (OP *);
572	{	578	#endif
573	coro_stack *stack = ctx->stack;
574
575	ctx->stack = 0;
576
577	if (stack)
578	{	579	}
579	if (!--stack->refcnt)
580	{
581	#ifdef HAVE_MMAP
582	if (stack->ssize > 0 && stack->sptr)
583	munmap (stack->sptr, stack->ssize);
584	else
585	#endif
586	Safefree (stack->sptr);
587		580
588	Safefree (stack);	581	return rss;
589	}
590	else if (ctx->gencnt == stack->gencnt)
591	--stack->usecnt;
592	}
593	}	582	}
594		583
		584	/** coroutine stack handling ************************************************/
		585
595	static void	586	static void
596	setup_coro (void *arg)	587	coro_setup (pTHX_ struct coro *coro)
597	{	588	{
598	/*	589	/*
599	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
600	*/	591	*/
		592	coro_init_stacks (aTHX);
		593
		594	PL_runops = RUNOPS_DEFAULT;
		595	PL_curcop = &PL_compiling;
		596	PL_in_eval = EVAL_NULL;
		597	PL_comppad = 0;
		598	PL_curpm = 0;
		599	PL_localizing = 0;
		600	PL_dirty = 0;
		601	PL_restartop = 0;
		602
		603	GvSV (PL_defgv) = NEWSV (0, 0);
		604	GvAV (PL_defgv) = coro->args; coro->args = 0;
		605	GvSV (PL_errgv) = NEWSV (0, 0);
		606	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		607	PL_rs = newSVsv (GvSV (irsgv));
		608
		609	{
		610	IO *io = newIO ();
		611	PL_defoutgv = (GV *)NEWSV (0, 0);
		612	gv_init (PL_defoutgv, coro_state_stash, "stdout", sizeof ("stdout") - 1, 0);
		613	IoTYPE (io) = IoTYPE_WRONLY;
		614	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		615	IoFLAGS (io) |= IOf_FLUSH;
		616	GvIOp (PL_defoutgv) = io;
		617	}
		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	{
		810	dSP;
		811	LOGOP myop;
		812
		813	PL_top_env = &PL_start_env;
		814
		815	if (cctx->flags & CC_TRACE)
		816	PL_runops = runops_trace;
		817
		818	Zero (&myop, 1, LOGOP);
		819	myop.op_next = PL_op;
		820	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		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;
		827	PL_op = (OP *)&myop;
		828	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		829	SPAGAIN;
		830	}
		831
		832	/*
		833	* this is a _very_ stripped down perl interpreter ;)
		834	*/
		835	static void
		836	coro_run (void *arg)
		837	{
601	dTHX;	838	dTHX;
602	dSP;
603	Coro__State ctx = (Coro__State)arg;
604	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
605		839
606	coro_init_stacks (aTHX);	840	/* coro_run is the alternative tail of transfer(), so unlock here. */
607	/*PL_curcop = 0;*/	841	UNLOCK;
608	/*PL_in_eval = PL_in_eval;*/ /* inherit */
609	SvREFCNT_dec (GvAV (PL_defgv));
610	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
611		842
612	SPAGAIN;	843	/* we now skip the entersub that lead to transfer() */
		844	PL_op = PL_op->op_next;
613		845
614	if (ctx->stack)	846	/* inject a fake subroutine call to cctx_init */
615	{	847	prepare_cctx (aTHX_ (coro_cctx *)arg);
616	ctx->cursp = 0;
617		848
618	PUSHMARK(SP);	849	/* somebody or something will hit me for both perl_run and PL_restartop */
619	PUTBACK;	850	PL_restartop = PL_op;
620	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	851	perl_run (PL_curinterp);
621		852
622	if (SvTRUE (ERRSV))	853	/*
623	croak (NULL);	854	* If perl-run returns we assume exit() was being called or the coro
624	else	855	* fell off the end, which seems to be the only valid (non-bug)
625	croak ("FATAL: CCTXT coroutine returned!");	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
		859	*/
		860	PL_top_env = main_top_env;
		861	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		862	}
		863
		864	static coro_cctx *
		865	cctx_new ()
		866	{
		867	coro_cctx *cctx;
		868	void *stack_start;
		869	size_t stack_size;
		870
		871	++cctx_count;
		872
		873	Newz (0, cctx, 1, coro_cctx);
		874
		875	#if HAVE_MMAP
		876
		877	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		878	/* mmap supposedly does allocate-on-write for us */
		879	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		880
		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;
626	}	889	}
627	else	890	else
628	{	891	#endif
629	UNOP myop;
630
631	Zero(&myop, 1, UNOP);
632	myop.op_next = Nullop;
633	myop.op_flags = OPf_WANT_VOID;
634
635	PL_op = (OP *)&myop;
636
637	PUSHMARK(SP);
638	XPUSHs (sub_init);
639	/*
640	* the next line is slightly wrong, as PL_op->op_next
641	* is actually being executed so we skip the first op.
642	* that doesn't matter, though, since it is only
643	* pp_nextstate and we never return...
644	* ah yes, and I don't care anyways ;)
645	*/
646	PUTBACK;
647	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
648	SPAGAIN;
649
650	ENTER; /* necessary e.g. for dounwind */
651	}	892	{
652	}	893	cctx->ssize = coro_stacksize * (long)sizeof (long);
		894	New (0, cctx->sptr, coro_stacksize, long);
653		895
654	static void	896	if (!cctx->sptr)
655	continue_coro (void *arg)	897	{
656	{	898	perror ("FATAL: unable to allocate stack for coroutine");
657	/*	899	_exit (EXIT_FAILURE);
658	* this is a _very_ stripped down perl interpreter ;)	900	}
659	*/
660	dTHX;
661	Coro__State ctx = (Coro__State)arg;
662		901
663	PL_top_env = &PL_start_env;	902	stack_start = cctx->sptr;
		903	stack_size = cctx->ssize;
		904	}
664		905
665	ctx->cursp = 0;	906	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
666	PL_op = PL_op->op_next;	907	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
667	CALLRUNOPS(aTHX);
668		908
669	abort ();	909	return cctx;
670	}	910	}
671		911
672	static void	912	static void
		913	cctx_destroy (coro_cctx *cctx)
		914	{
		915	if (!cctx)
		916	return;
		917
		918	--cctx_count;
		919
		920	#if CORO_USE_VALGRIND
		921	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		922	#endif
		923
		924	#if HAVE_MMAP
		925	if (cctx->flags & CC_MAPPED)
		926	munmap (cctx->sptr, cctx->ssize);
		927	else
		928	#endif
		929	Safefree (cctx->sptr);
		930
		931	Safefree (cctx);
		932	}
		933
		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
		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
673	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	993	transfer (pTHX_ struct coro *prev, struct coro *next)
674	{	994	{
675	dSTACKLEVEL;	995	dSTACKLEVEL;
676		996
		997	/* sometimes transfer is only called to set idle_sp */
		998	if (!next)
		999	{
		1000	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1001	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1002	}
677	if (prev != next)	1003	else if (prev != next)
678	{	1004	{
679	/* has this coro been created yet? */	1005	coro_cctx *prev__cctx;
680	if (next->mainstack)	1006
		1007	if (prev->flags & CF_NEW)
681	{	1008	{
682	LOCK;	1009	/* create a new empty context */
683	SAVE (prev, flags);	1010	Newz (0, prev->cctx, 1, coro_cctx);
684	LOAD (next);	1011	prev->flags &= ~CF_NEW;
685	UNLOCK;	1012	prev->flags |= CF_RUNNING;
686
687	/* mark this state as in-use */
688	next->mainstack = 0;
689	next->tmps_ix = -2;
690
691	/* stacklevel changed? if yes, grab the stack for us! */
692	if (flags & TRANSFER_SAVE_CCTXT)
693	{
694	if (!prev->stack)
695	allocate_stack (prev, 0);
696	else if (prev->cursp != stacklevel
697	&& prev->stack->usecnt > 1)
698	{
699	prev->gencnt = ++prev->stack->gencnt;
700	prev->stack->usecnt = 1;
701	}
702
703	/* has our stack been invalidated? */
704	if (next->stack && next->stack->gencnt != next->gencnt)
705	{
706	deallocate_stack (next);
707	allocate_stack (next, 1);
708	coro_create (&(next->stack->cctx),
709	continue_coro, (void *)next,
710	next->stack->sptr, labs (next->stack->ssize));
711	}
712
713	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
714	prev->cursp = stacklevel;
715	/* don't add any code here */
716	}
717	else
718	next->cursp = stacklevel;
719	}	1013	}
720	else if (next->tmps_ix == -2)	1014
721	croak ("tried to transfer to running coroutine");	1015	prev->flags &= ~CF_RUNNING;
		1016	next->flags |= CF_RUNNING;
		1017
		1018	LOCK;
		1019
		1020	if (next->flags & CF_NEW)
		1021	{
		1022	/* need to start coroutine */
		1023	next->flags &= ~CF_NEW;
		1024	/* first get rid of the old state */
		1025	save_perl (aTHX_ prev);
		1026	/* setup coroutine call */
		1027	coro_setup (aTHX_ next);
		1028	}
722	else	1029	else
723	{	1030	{
724	LOCK;	1031	/* coroutine already started */
725	SAVE (prev, -1); /* first get rid of the old state */	1032	save_perl (aTHX_ prev);
726	UNLOCK;	1033	load_perl (aTHX_ next);
727
728	/* create the coroutine for the first time */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733
734	/* the new coroutine starts with start_env again */
735	PL_top_env = &PL_start_env;
736
737	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
738	{
739	setup_coro (next);
740	next->cursp = stacklevel;
741
742	prev->stack->refcnt++;
743	prev->stack->usecnt++;
744	next->stack = prev->stack;
745	next->gencnt = prev->gencnt;
746	}
747	else
748	{
749	assert (!next->stack);
750	allocate_stack (next, 1);
751	coro_create (&(next->stack->cctx),
752	setup_coro, (void *)next,
753	next->stack->sptr, labs (next->stack->ssize));
754	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755	prev->cursp = stacklevel;
756	/* don't add any code here */
757	}
758	}
759	else
760	{
761	setup_coro (next);
762	next->cursp = stacklevel;
763	}
764	}	1034	}
765	}
766		1035
767	LOCK;	1036	prev__cctx = prev->cctx;
768	if (coro_mortal)	1037
769	{	1038	/* possibly "free" the cctx */
770	SvREFCNT_dec (coro_mortal);	1039	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
771	coro_mortal = 0;	1040	{
772	}	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
		1051	if (!next->cctx)
		1052	next->cctx = cctx_get (aTHX);
		1053
		1054	if (prev__cctx != next->cctx)
		1055	{
		1056	prev__cctx->top_env = PL_top_env;
		1057	PL_top_env = next->cctx->top_env;
		1058	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1059	}
		1060
		1061	free_coro_mortal (aTHX);
773	UNLOCK;	1062	UNLOCK;
		1063	}
774	}	1064	}
775		1065
776	#define SV_CORO(sv,func) \	1066	struct transfer_args
777	do { \	1067	{
778	if (SvROK (sv)) \	1068	struct coro *prev, *next;
779	sv = SvRV (sv); \	1069	};
780	\
781	if (SvTYPE (sv) == SVt_PVHV) \
782	{ \
783	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
784	\
785	if (!he) \
786	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787	\
788	(sv) = SvRV (HeVAL(he)); \
789	} \
790	\
791	/* must also be changed inside Coro::Cont::yield */ \
792	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
793	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794	\
795	} while(0)
796		1070
797	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	1071	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1072	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
798		1073
		1074	/** high level stuff ********************************************************/
		1075
799	static void	1076	static int
		1077	coro_state_destroy (pTHX_ struct coro *coro)
		1078	{
		1079	if (coro->flags & CF_DESTROYED)
		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 */
		1094
		1095	if (coro->mainstack && coro->mainstack != main_mainstack)
		1096	{
		1097	struct coro temp;
		1098
		1099	if (coro->flags & CF_RUNNING)
		1100	croak ("FATAL: tried to destroy currently running coroutine");
		1101
		1102	save_perl (aTHX_ &temp);
		1103	load_perl (aTHX_ coro);
		1104
		1105	coro_destroy (aTHX_ coro);
		1106
		1107	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1108
		1109	coro->mainstack = 0;
		1110	}
		1111
		1112	cctx_destroy (coro->cctx);
		1113	SvREFCNT_dec (coro->args);
		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;
		1120	}
		1121
		1122	static int
		1123	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1124	{
		1125	struct coro *coro = (struct coro *)mg->mg_ptr;
		1126	mg->mg_ptr = 0;
		1127
		1128	coro->hv = 0;
		1129
		1130	if (--coro->refcnt < 0)
		1131	{
		1132	coro_state_destroy (aTHX_ coro);
		1133	Safefree (coro);
		1134	}
		1135
		1136	return 0;
		1137	}
		1138
		1139	static int
		1140	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1141	{
		1142	struct coro *coro = (struct coro *)mg->mg_ptr;
		1143
		1144	++coro->refcnt;
		1145
		1146	return 0;
		1147	}
		1148
		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	};
		1159
		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
800	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1169	api_transfer (SV *prev_sv, SV *next_sv)
801	{	1170	{
802	SV_CORO (prev, "Coro::transfer");	1171	dTHX;
803	SV_CORO (next, "Coro::transfer");	1172	struct transfer_args ta;
804		1173
805	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1174	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1175	TRANSFER (ta);
806	}	1176	}
807		1177
808	/** Coro ********************************************************************/	1178	/** Coro ********************************************************************/
809		1179
810	#define PRIO_MAX 3
811	#define PRIO_HIGH 1
812	#define PRIO_NORMAL 0
813	#define PRIO_LOW -1
814	#define PRIO_IDLE -3
815	#define PRIO_MIN -4
816
817	/* for Coro.pm */
818	static GV *coro_current, *coro_idle;
819	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
820	static int coro_nready;
821
822	static void	1180	static void
823	coro_enq (pTHX_ SV *sv)	1181	coro_enq (pTHX_ SV *coro_sv)
824	{	1182	{
825	SV **xprio;
826	int prio;
827
828	if (SvTYPE (sv) != SVt_PVHV)
829	croak ("Coro::ready tried to enqueue something that is not a coroutine");
830
831	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
832	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
833
834	prio = prio > PRIO_MAX ? PRIO_MAX
835	: prio < PRIO_MIN ? PRIO_MIN
836	: prio;
837
838	av_push (coro_ready [prio - PRIO_MIN], sv);	1183	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
839	coro_nready++;
840	}	1184	}
841		1185
842	static SV *	1186	static SV *
843	coro_deq (pTHX_ int min_prio)	1187	coro_deq (pTHX_ int min_prio)
844	{	1188	{
…		…
847	min_prio -= PRIO_MIN;	1191	min_prio -= PRIO_MIN;
848	if (min_prio < 0)	1192	if (min_prio < 0)
849	min_prio = 0;	1193	min_prio = 0;
850		1194
851	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1195	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852	if (av_len (coro_ready[prio]) >= 0)	1196	if (AvFILLp (coro_ready [prio]) >= 0)
853	{
854	coro_nready--;
855	return av_shift (coro_ready[prio]);	1197	return av_shift (coro_ready [prio]);
856	}
857		1198
858	return 0;	1199	return 0;
859	}	1200	}
860		1201
861	static void	1202	static int
862	api_ready (SV *coro)	1203	api_ready (SV *coro_sv)
863	{	1204	{
864	dTHX;	1205	dTHX;
		1206	struct coro *coro;
865		1207
866	if (SvROK (coro))	1208	if (SvROK (coro_sv))
867	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;
868		1217
869	LOCK;	1218	LOCK;
870	coro_enq (aTHX_ SvREFCNT_inc (coro));	1219	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1220	++coro_nready;
871	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;
872	}	1310	}
873		1311
874	static void	1312	static void
875	api_schedule (void)	1313	api_schedule (void)
876	{	1314	{
877	dTHX;	1315	dTHX;
		1316	struct transfer_args ta;
878		1317
879	SV *prev, *next;	1318	prepare_schedule (aTHX_ &ta);
880		1319	TRANSFER (ta);
881	LOCK;
882
883	prev = SvRV (GvSV (coro_current));
884	next = coro_deq (aTHX_ PRIO_MIN);
885
886	if (!next)
887	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
888
889	/* free this only after the transfer */
890	coro_mortal = prev;
891	SV_CORO (prev, "Coro::schedule");
892
893	SvRV (GvSV (coro_current)) = next;
894
895	SV_CORO (next, "Coro::schedule");
896
897	UNLOCK;
898
899	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
900	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
901	}	1320	}
902		1321
903	static void	1322	static int
904	api_cede (void)	1323	api_cede (void)
905	{	1324	{
906	dTHX;	1325	dTHX;
		1326	struct transfer_args ta;
907		1327
908	LOCK;	1328	prepare_cede (aTHX_ &ta);
909	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
910	UNLOCK;
911		1329
912	api_schedule ();	1330	if (ta.prev != ta.next)
		1331	{
		1332	TRANSFER (ta);
		1333	return 1;
		1334	}
		1335	else
		1336	return 0;
913	}	1337	}
914		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
915	MODULE = Coro::State PACKAGE = Coro::State	1380	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
916		1381
917	PROTOTYPES: ENABLE	1382	PROTOTYPES: DISABLE
918		1383
919	BOOT:	1384	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1385	{
921	#ifdef USE_ITHREADS	1386	#ifdef USE_ITHREADS
922	MUTEX_INIT (&coro_mutex);	1387	MUTEX_INIT (&coro_mutex);
923	#endif	1388	#endif
924	BOOT_PAGESIZE;	1389	BOOT_PAGESIZE;
925		1390
926	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1391	irsgv = gv_fetchpv ("/", 1, SVt_PV);
927	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1392
928	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1393	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929		1394
930	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1395	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
931	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1396	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
932	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1397	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
933	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1398	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
934		1399
935	main_mainstack = PL_mainstack;	1400	main_mainstack = PL_mainstack;
		1401	main_top_env = PL_top_env;
		1402
		1403	while (main_top_env->je_prev)
		1404	main_top_env = main_top_env->je_prev;
936		1405
937	coroapi.ver = CORO_API_VERSION;	1406	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1407	coroapi.transfer = api_transfer;
939	}
940		1408
941	Coro::State	1409	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1410	}
943	SV * args	1411
944	PROTOTYPE: $	1412	SV *
		1413	new (char *klass, ...)
945	CODE:	1414	CODE:
946	Coro__State coro;	1415	{
		1416	struct coro *coro;
		1417	HV *hv;
		1418	int i;
947		1419
948	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
949	croak ("Coro::State::_newprocess expects an arrayref");
950
951	Newz (0, coro, 1, struct coro);	1420	Newz (0, coro, 1, struct coro);
		1421	coro->args = newAV ();
		1422	coro->flags = CF_NEW;
952		1423
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1424	if (coro_first) coro_first->prev = coro;
954	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1425	coro->next = coro_first;
955	/*coro->stack = 0;*/	1426	coro_first = coro;
956		1427
957	RETVAL = coro;	1428	coro->hv = hv = newHV ();
		1429	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1430	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1431
		1432	for (i = 1; i < items; i++)
		1433	av_push (coro->args, newSVsv (ST (i)));
		1434	}
958	OUTPUT:	1435	OUTPUT:
959	RETVAL	1436	RETVAL
960		1437
		1438	# these not obviously related functions are all rolled into the same xs
		1439	# function to increase chances that they all will call transfer with the same
		1440	# stack offset
961	void	1441	void
962	transfer(prev, next, flags)	1442	_set_stacklevel (...)
963	SV *prev	1443	ALIAS:
964	SV *next	1444	Coro::State::transfer = 1
965	int flags	1445	Coro::schedule = 2
966	PROTOTYPE: @	1446	Coro::cede = 3
		1447	Coro::cede_notself = 4
967	CODE:	1448	CODE:
968	PUTBACK;	1449	{
969	SV_CORO (next, "Coro::transfer");	1450	struct transfer_args ta;
970	SV_CORO (prev, "Coro::transfer");	1451
971	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1452	switch (ix)
972	SPAGAIN;	1453	{
		1454	case 0:
		1455	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1456	ta.next = 0;
		1457	break;
		1458
		1459	case 1:
		1460	if (items != 2)
		1461	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1462
		1463	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1464	break;
		1465
		1466	case 2:
		1467	prepare_schedule (aTHX_ &ta);
		1468	break;
		1469
		1470	case 3:
		1471	prepare_cede (aTHX_ &ta);
		1472	break;
		1473
		1474	case 4:
		1475	if (!prepare_cede_notself (aTHX_ &ta))
		1476	XSRETURN_EMPTY;
		1477
		1478	break;
		1479	}
		1480
		1481	BARRIER;
		1482	TRANSFER (ta);
		1483
		1484	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1485	XSRETURN_YES;
		1486	}
		1487
		1488	bool
		1489	_destroy (SV *coro_sv)
		1490	CODE:
		1491	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1492	OUTPUT:
		1493	RETVAL
973		1494
974	void	1495	void
975	DESTROY(coro)
976	Coro::State coro
977	CODE:
978
979	if (coro->mainstack && coro->mainstack != main_mainstack)
980	{
981	struct coro temp;
982
983	PUTBACK;
984	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
985	LOAD (aTHX_ coro);
986	SPAGAIN;
987
988	destroy_stacks (aTHX);
989
990	LOAD ((&temp)); /* this will get rid of defsv etc.. */
991	SPAGAIN;
992
993	coro->mainstack = 0;
994	}
995
996	deallocate_stack (coro);
997	SvREFCNT_dec (coro->args);
998	Safefree (coro);
999
1000	void
1001	_exit(code)	1496	_exit (code)
1002	int code	1497	int code
1003	PROTOTYPE: $	1498	PROTOTYPE: $
1004	CODE:	1499	CODE:
1005	_exit (code);	1500	_exit (code);
1006		1501
1007	MODULE = Coro::State PACKAGE = Coro::Cont	1502	int
		1503	cctx_stacksize (int new_stacksize = 0)
		1504	CODE:
		1505	RETVAL = coro_stacksize;
		1506	if (new_stacksize)
		1507	coro_stacksize = new_stacksize;
		1508	OUTPUT:
		1509	RETVAL
		1510
		1511	int
		1512	cctx_count ()
		1513	CODE:
		1514	RETVAL = cctx_count;
		1515	OUTPUT:
		1516	RETVAL
		1517
		1518	int
		1519	cctx_idle ()
		1520	CODE:
		1521	RETVAL = cctx_idle;
		1522	OUTPUT:
		1523	RETVAL
1008		1524
1009	void	1525	void
1010	yield(...)	1526	list ()
1011	PROTOTYPE: @	1527	PPCODE:
		1528	{
		1529	struct coro *coro;
		1530	for (coro = coro_first; coro; coro = coro->next)
		1531	if (coro->hv)
		1532	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1533	}
		1534
		1535	void
		1536	call (Coro::State coro, SV *coderef)
		1537	ALIAS:
		1538	eval = 1
		1539	CODE:
		1540	{
		1541	if (coro->mainstack)
		1542	{
		1543	struct coro temp;
		1544	Zero (&temp, 1, struct coro);
		1545
		1546	if (!(coro->flags & CF_RUNNING))
		1547	{
		1548	save_perl (aTHX_ &temp);
		1549	load_perl (aTHX_ coro);
		1550	}
		1551
		1552	{
		1553	dSP;
		1554	ENTER;
		1555	SAVETMPS;
		1556	PUSHMARK (SP);
		1557	PUTBACK;
		1558	if (ix)
		1559	eval_sv (coderef, 0);
		1560	else
		1561	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1562	SPAGAIN;
		1563	FREETMPS;
		1564	LEAVE;
		1565	PUTBACK;
		1566	}
		1567
		1568	if (!(coro->flags & CF_RUNNING))
		1569	{
		1570	save_perl (aTHX_ coro);
		1571	load_perl (aTHX_ &temp);
		1572	}
		1573	}
		1574	}
		1575
		1576	SV *
		1577	is_ready (Coro::State coro)
		1578	PROTOTYPE: $
		1579	ALIAS:
		1580	is_ready = CF_READY
		1581	is_running = CF_RUNNING
		1582	is_new = CF_NEW
		1583	is_destroyed = CF_DESTROYED
		1584	CODE:
		1585	RETVAL = boolSV (coro->flags & ix);
		1586	OUTPUT:
		1587	RETVAL
		1588
		1589	void
		1590	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1591
		1592	SV *
		1593	has_stack (Coro::State coro)
		1594	PROTOTYPE: $
		1595	CODE:
		1596	RETVAL = boolSV (!!coro->cctx);
		1597	OUTPUT:
		1598	RETVAL
		1599
		1600	int
		1601	is_traced (Coro::State coro)
		1602	PROTOTYPE: $
		1603	CODE:
		1604	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1605	OUTPUT:
		1606	RETVAL
		1607
		1608	IV
		1609	rss (Coro::State coro)
		1610	PROTOTYPE: $
		1611	ALIAS:
		1612	usecount = 1
1012	CODE:	1613	CODE:
1013	SV *yieldstack;	1614	switch (ix)
1014	SV *sv;	1615	{
1015	AV *defav = GvAV (PL_defgv);	1616	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1016	struct coro *prev, *next;	1617	case 1: RETVAL = coro->usecount; break;
1017
1018	yieldstack = *hv_fetch (
1019	(HV *)SvRV (GvSV (coro_current)),
1020	"yieldstack", sizeof ("yieldstack") - 1,
1021	0	1618	}
1022	);	1619	OUTPUT:
		1620	RETVAL
1023		1621
1024	/* set up @_ -- ugly */
1025	av_clear (defav);
1026	av_fill (defav, items - 1);
1027	while (items--)
1028	av_store (defav, items, SvREFCNT_inc (ST(items)));
1029
1030	sv = av_pop ((AV *)SvRV (yieldstack));
1031	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1032	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1033	SvREFCNT_dec (sv);
1034
1035	transfer (aTHX_ prev, next, 0);
1036		1622
1037	MODULE = Coro::State PACKAGE = Coro	1623	MODULE = Coro::State PACKAGE = Coro
1038		1624
1039	BOOT:	1625	BOOT:
1040	{	1626	{
1041	int i;	1627	int i;
		1628
		1629	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1630	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1631	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1632
		1633	coro_current = get_sv ("Coro::current", FALSE);
		1634	SvREADONLY_on (coro_current);
		1635
1042	HV *stash = gv_stashpv ("Coro", TRUE);	1636	coro_stash = gv_stashpv ("Coro", TRUE);
1043		1637
1044	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1638	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1045	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1639	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1046	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1640	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1047	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1641	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1048	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1642	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1049	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1643	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1050
1051	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1052	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1053		1644
1054	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1645	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1055	coro_ready[i] = newAV ();	1646	coro_ready[i] = newAV ();
1056		1647
1057	{	1648	{
1058	SV *sv = perl_get_sv("Coro::API", 1);	1649	SV *sv = perl_get_sv("Coro::API", 1);
1059		1650
1060	coroapi.schedule = api_schedule;	1651	coroapi.schedule = api_schedule;
1061	coroapi.cede = api_cede;	1652	coroapi.cede = api_cede;
		1653	coroapi.cede_notself = api_cede_notself;
1062	coroapi.ready = api_ready;	1654	coroapi.ready = api_ready;
		1655	coroapi.is_ready = api_is_ready;
1063	coroapi.nready = &coro_nready;	1656	coroapi.nready = &coro_nready;
1064	coroapi.current = coro_current;	1657	coroapi.current = coro_current;
1065		1658
1066	GCoroAPI = &coroapi;	1659	GCoroAPI = &coroapi;
1067	sv_setiv (sv, (IV)&coroapi);	1660	sv_setiv (sv, (IV)&coroapi);
1068	SvREADONLY_on (sv);	1661	SvREADONLY_on (sv);
1069	}	1662	}
1070	}	1663	}
1071		1664
1072	#if !PERL_MICRO
1073
1074	void	1665	void
1075	ready(self)	1666	_set_current (SV *current)
1076	SV * self
1077	PROTOTYPE: $	1667	PROTOTYPE: $
1078	CODE:	1668	CODE:
1079	api_ready (self);	1669	SvREFCNT_dec (SvRV (coro_current));
1080		1670	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1081	#endif
1082		1671
1083	int	1672	int
		1673	prio (Coro::State coro, int newprio = 0)
		1674	ALIAS:
		1675	nice = 1
		1676	CODE:
		1677	{
		1678	RETVAL = coro->prio;
		1679
		1680	if (items > 1)
		1681	{
		1682	if (ix)
		1683	newprio = coro->prio - newprio;
		1684
		1685	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1686	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1687
		1688	coro->prio = newprio;
		1689	}
		1690	}
		1691	OUTPUT:
		1692	RETVAL
		1693
		1694	SV *
		1695	ready (SV *self)
		1696	PROTOTYPE: $
		1697	CODE:
		1698	RETVAL = boolSV (api_ready (self));
		1699	OUTPUT:
		1700	RETVAL
		1701
		1702	int
1084	nready(...)	1703	nready (...)
1085	PROTOTYPE:	1704	PROTOTYPE:
1086	CODE:	1705	CODE:
1087	RETVAL = coro_nready;	1706	RETVAL = coro_nready;
1088	OUTPUT:	1707	OUTPUT:
1089	RETVAL	1708	RETVAL
1090		1709
		1710	# for async_pool speedup
1091	void	1711	void
1092	schedule(...)	1712	_pool_1 (SV *cb)
1093	PROTOTYPE:
1094	CODE:	1713	CODE:
1095	api_schedule ();	1714	{
		1715	struct coro *coro = SvSTATE (coro_current);
		1716	HV *hv = (HV *)SvRV (coro_current);
		1717	AV *defav = GvAV (PL_defgv);
		1718	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1719	AV *invoke_av;
		1720	int i, len;
		1721
		1722	if (!invoke)
		1723	croak ("\3terminate\2\n");
		1724
		1725	SvREFCNT_dec (coro->saved_deffh);
		1726	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1727
		1728	hv_store (hv, "desc", sizeof ("desc") - 1,
		1729	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1730
		1731	invoke_av = (AV *)SvRV (invoke);
		1732	len = av_len (invoke_av);
		1733
		1734	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1735
		1736	if (len > 0)
		1737	{
		1738	av_fill (defav, len - 1);
		1739	for (i = 0; i < len; ++i)
		1740	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1741	}
		1742
		1743	SvREFCNT_dec (invoke);
		1744	}
1096		1745
1097	void	1746	void
1098	cede(...)	1747	_pool_2 (SV *cb)
1099	PROTOTYPE:
1100	CODE:	1748	CODE:
1101	api_cede ();	1749	{
		1750	struct coro *coro = SvSTATE (coro_current);
1102		1751
1103	# and these are hacks	1752	sv_setsv (cb, &PL_sv_undef);
		1753
		1754	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1755	coro->saved_deffh = 0;
		1756
		1757	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1758	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1759	croak ("\3terminate\2\n");
		1760
		1761	av_clear (GvAV (PL_defgv));
		1762	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1763	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1764
		1765	coro->prio = 0;
		1766
		1767	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1768	api_trace (coro_current, 0);
		1769
		1770	av_push (av_async_pool, newSVsv (coro_current));
		1771	}
		1772
		1773
		1774	MODULE = Coro::State PACKAGE = Coro::AIO
		1775
1104	SV *	1776	SV *
1105	_aio_get_state ()	1777	_get_state ()
1106	CODE:	1778	CODE:
1107	{	1779	{
1108	struct {	1780	struct io_state *data;
1109	int errorno;
1110	int laststype;
1111	int laststatval;
1112	Stat_t statcache;
1113	} data;
1114		1781
		1782	RETVAL = newSV (sizeof (struct io_state));
		1783	data = (struct io_state *)SvPVX (RETVAL);
		1784	SvCUR_set (RETVAL, sizeof (struct io_state));
		1785	SvPOK_only (RETVAL);
		1786
1115	data.errorno = errno;	1787	data->errorno = errno;
1116	data.laststype = PL_laststype;	1788	data->laststype = PL_laststype;
1117	data.laststatval = PL_laststatval;	1789	data->laststatval = PL_laststatval;
1118	data.statcache = PL_statcache;	1790	data->statcache = PL_statcache;
1119
1120	RETVAL = newSVpvn ((char *)&data, sizeof data);
1121	}	1791	}
1122	OUTPUT:	1792	OUTPUT:
1123	RETVAL	1793	RETVAL
1124		1794
1125	void	1795	void
1126	_aio_set_state (char *data_)	1796	_set_state (char *data_)
1127	PROTOTYPE: $	1797	PROTOTYPE: $
1128	CODE:	1798	CODE:
1129	{	1799	{
1130	struct {	1800	struct io_state *data = (void *)data_;
1131	int errorno;
1132	int laststype;
1133	int laststatval;
1134	Stat_t statcache;
1135	} *data = (void *)data_;
1136		1801
1137	errno = data->errorno;	1802	errno = data->errorno;
1138	PL_laststype = data->laststype;	1803	PL_laststype = data->laststype;
1139	PL_laststatval = data->laststatval;	1804	PL_laststatval = data->laststatval;
1140	PL_statcache = data->statcache;	1805	PL_statcache = data->statcache;
1141	}	1806	}
		1807

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