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Comparing Coro/Coro/State.xs (file contents):
Revision 1.16 by root, Wed Jul 25 04:26:55 2001 UTC vs.
Revision 1.195 by root, Sat Oct 6 00:35:41 2007 UTC

		1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "libcoro/coro.c"	9	#include "patchlevel.h"
		10
		11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
6		14
7	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
8	# include <unistd.h>	16	# include <unistd.h>
9	# include <sys/mman.h>	17	# include <sys/mman.h>
10	# ifndef MAP_ANON
11	# ifdef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
12	# define MAP_ANON MAP_ANONYMOUS	19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
13	# else	21	# else
14	# undef HAVE_MMAP	22	# undef HAVE_MMAP
15	# endif	23	# endif
16	# 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
17	#endif	32	# endif
18
19	#define MAY_FLUSH /* increases codesize */
20
21	/* perl-related */
22	#define TRANSFER_SAVE_DEFAV 0x00000001
23	#define TRANSFER_SAVE_DEFSV 0x00000002
24	#define TRANSFER_SAVE_ERRSV 0x00000004
25	/* c-related */
26	#define TRANSFER_SAVE_CCTXT 0x00000008
27	#ifdef CORO_LAZY_STACK
28	# define TRANSFER_LAZY_STACK 0x00000010
29	#else	33	#else
30	# define TRANSFER_LAZY_STACK 0x00000000	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)
		55	# ifndef PL_ppaddr
		56	# define PL_ppaddr ppaddr
31	#endif	57	# endif
		58	# ifndef call_sv
		59	# define call_sv perl_call_sv
		60	# endif
		61	# ifndef get_sv
		62	# define get_sv perl_get_sv
		63	# endif
		64	# ifndef get_cv
		65	# define get_cv perl_get_cv
		66	# endif
		67	# ifndef IS_PADGV
		68	# define IS_PADGV(v) 0
		69	# endif
		70	# ifndef IS_PADCONST
		71	# define IS_PADCONST(v) 0
		72	# endif
		73	#endif
32		74
33	#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV|TRANSFER_SAVE_DEFSV \	75	/* 5.8.7 */
34	|TRANSFER_SAVE_ERRSV|TRANSFER_SAVE_CCTXT)	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
35		79
36	#define SUB_INIT "Coro::State::initialize"	80	/* 5.8.8 */
37	#define UCORO_STATE "_coro_state"	81	#ifndef GV_NOTQUAL
		82	# define GV_NOTQUAL 0
		83	#endif
		84	#ifndef newSV
		85	# define newSV(l) NEWSV(0,l)
		86	#endif
38		87
39	/* The next macro should delcare a variable stacklevel that contains and approximation	88	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40	* to the current C stack pointer. It's property is that it changes with each call	89	# undef CORO_STACKGUARD
41	* and should be unique. */	90	#endif
		91
		92	#ifndef CORO_STACKGUARD
		93	# define CORO_STACKGUARD 0
		94	#endif
		95
		96	/* prefer perl internal functions over our own? */
		97	#ifndef CORO_PREFER_PERL_FUNCTIONS
		98	# define CORO_PREFER_PERL_FUNCTIONS 0
		99	#endif
		100
		101	/* The next macros try to return the current stack pointer, in an as
		102	* portable way as possible. */
		103	#define dSTACKLEVEL volatile char stacklevel
42	#define dSTACKLEVEL void *stacklevel = &stacklevel	104	#define STACKLEVEL ((void *)&stacklevel)
43		105
44	#define labs(l) ((l) >= 0 ? (l) : -(l))	106	#define IN_DESTRUCT (PL_main_cv == Nullcv)
45		107
46	/* this is actually not only the c stack but also c registers etc... */	108	#if __GNUC__ >= 3
		109	# define attribute(x) __attribute__(x)
		110	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		111	# define expect(expr,value) __builtin_expect ((expr),(value))
		112	#else
		113	# define attribute(x)
		114	# define BARRIER
		115	# define expect(expr,value) (expr)
		116	#endif
		117
		118	#define expect_false(expr) expect ((expr) != 0, 0)
		119	#define expect_true(expr) expect ((expr) != 0, 1)
		120
		121	#define NOINLINE attribute ((noinline))
		122
		123	#include "CoroAPI.h"
		124
		125	#ifdef USE_ITHREADS
		126	static perl_mutex coro_mutex;
		127	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		128	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		129	#else
		130	# define LOCK (void)0
		131	# define UNLOCK (void)0
		132	#endif
		133
		134	/* helper storage struct for Coro::AIO */
		135	struct io_state
		136	{
		137	int errorno;
		138	I32 laststype;
		139	int laststatval;
		140	Stat_t statcache;
		141	};
		142
		143	static size_t coro_stacksize = CORO_STACKSIZE;
		144	static struct CoroAPI coroapi;
		145	static AV *main_mainstack; /* used to differentiate between $main and others */
		146	static JMPENV *main_top_env;
		147	static HV *coro_state_stash, *coro_stash;
		148	static SV *coro_mortal; /* will be freed after next transfer */
		149
		150	static GV *irsgv; /* $/ */
		151	static GV *stdoutgv; /* *STDOUT */
		152
		153	/* async_pool helper stuff */
		154	static SV *sv_pool_rss;
		155	static SV *sv_pool_size;
		156	static AV *av_async_pool;
		157
		158	static struct coro_cctx *cctx_first;
		159	static int cctx_count, cctx_idle;
		160
		161	enum {
		162	CC_MAPPED = 0x01,
		163	CC_NOREUSE = 0x02, /* throw this away after tracing */
		164	CC_TRACE = 0x04,
		165	CC_TRACE_SUB = 0x08, /* trace sub calls */
		166	CC_TRACE_LINE = 0x10, /* trace each statement */
		167	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		168	};
		169
		170	/* this is a structure representing a c-level coroutine */
47	typedef struct {	171	typedef struct coro_cctx {
48	int refcnt; /* pointer reference counter */	172	struct coro_cctx *next;
49	int usecnt; /* shared by how many coroutines */
50	int gencnt; /* generation counter */
51		173
		174	/* the stack */
		175	void *sptr;
		176	size_t ssize;
		177
		178	/* cpu state */
		179	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		180	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		181	JMPENV *top_env;
52	coro_context cctx;	182	coro_context cctx;
53		183
54	void *sptr;	184	#if CORO_USE_VALGRIND
55	long ssize; /* positive == mmap, otherwise malloc */	185	int valgrind_id;
56	} coro_stack;	186	#endif
		187	unsigned char flags;
		188	} coro_cctx;
57		189
58	static coro_stack main_stack = { 1, 0, 0 };	190	enum {
		191	CF_RUNNING = 0x0001, /* coroutine is running */
		192	CF_READY = 0x0002, /* coroutine is ready */
		193	CF_NEW = 0x0004, /* has never been switched to */
		194	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		195	};
59		196
		197	/* this is a structure representing a perl-level coroutine */
60	struct coro {	198	struct coro {
61	/* the optional C context */	199	/* the c coroutine allocated to this perl coroutine, if any */
62	coro_stack *stack;	200	coro_cctx *cctx;
63	void *cursp;
64	int gencnt;
65
66	/* optionally saved, might be zero */
67	AV *defav;
68	SV *defsv;
69	SV *errsv;
70
71	/* saved global state not related to stacks */
72	U8 dowarn;
73
74	/* the stacks and related info (callchain etc..) */
75	PERL_SI *curstackinfo;
76	AV *curstack;
77	AV *mainstack;
78	SV **stack_sp;
79	OP *op;
80	SV **curpad;
81	SV **stack_base;
82	SV **stack_max;
83	SV **tmps_stack;
84	I32 tmps_floor;
85	I32 tmps_ix;
86	I32 tmps_max;
87	I32 *markstack;
88	I32 *markstack_ptr;
89	I32 *markstack_max;
90	I32 *scopestack;
91	I32 scopestack_ix;
92	I32 scopestack_max;
93	ANY *savestack;
94	I32 savestack_ix;
95	I32 savestack_max;
96	OP **retstack;
97	I32 retstack_ix;
98	I32 retstack_max;
99	COP *curcop;
100	JMPENV start_env;
101	JMPENV *top_env;
102		201
103	/* data associated with this coroutine (initial args) */	202	/* data associated with this coroutine (initial args) */
104	AV *args;	203	AV *args;
		204	int refcnt;
		205	int flags; /* CF_ flags */
		206
		207	/* optionally saved, might be zero */
		208	AV *defav; /* @_ */
		209	SV *defsv; /* $_ */
		210	SV *errsv; /* $@ */
		211	SV *deffh; /* default filehandle */
		212	SV *irssv; /* $/ */
		213	SV *irssv_sv; /* real $/ cache */
		214
		215	#define VAR(name,type) type name;
		216	# include "state.h"
		217	#undef VAR
		218
		219	/* statistics */
		220	int usecount; /* number of transfers to this coro */
		221
		222	/* coro process data */
		223	int prio;
		224	//SV *throw;
		225
		226	/* async_pool */
		227	SV *saved_deffh;
		228
		229	/* linked list */
		230	struct coro *next, *prev;
		231	HV *hv; /* the perl hash associated with this coro, if any */
105	};	232	};
106		233
107	typedef struct coro *Coro__State;	234	typedef struct coro *Coro__State;
108	typedef struct coro *Coro__State_or_hashref;	235	typedef struct coro *Coro__State_or_hashref;
109		236
110	static AV *main_mainstack; /* used to differentiate between $main and others */	237	/** Coro ********************************************************************/
111	static HV *coro_state_stash;
112	static SV *ucoro_state_sv;
113	static U32 ucoro_state_hash;
114	static HV *padlist_cache;
115		238
116	/* mostly copied from op.c:cv_clone2 */	239	#define PRIO_MAX 3
117	STATIC AV *	240	#define PRIO_HIGH 1
118	clone_padlist (AV *protopadlist)	241	#define PRIO_NORMAL 0
		242	#define PRIO_LOW -1
		243	#define PRIO_IDLE -3
		244	#define PRIO_MIN -4
		245
		246	/* for Coro.pm */
		247	static SV *coro_current;
		248	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		249	static int coro_nready;
		250	static struct coro *coro_first;
		251
		252	/** lowlevel stuff **********************************************************/
		253
		254	static AV *
		255	coro_clone_padlist (pTHX_ CV *cv)
119	{	256	{
120	AV *av;	257	AV *padlist = CvPADLIST (cv);
121	I32 ix;
122	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
123	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
124	SV **pname = AvARRAY (protopad_name);
125	SV **ppad = AvARRAY (protopad);
126	I32 fname = AvFILLp (protopad_name);
127	I32 fpad = AvFILLp (protopad);
128	AV *newpadlist, *newpad_name, *newpad;	258	AV *newpadlist, *newpad;
129	SV **npad;
130
131	newpad_name = newAV ();
132	for (ix = fname; ix >= 0; ix--)
133	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
134
135	newpad = newAV ();
136	av_fill (newpad, AvFILLp (protopad));
137	npad = AvARRAY (newpad);
138		259
139	newpadlist = newAV ();	260	newpadlist = newAV ();
140	AvREAL_off (newpadlist);	261	AvREAL_off (newpadlist);
141	av_store (newpadlist, 0, (SV *) newpad_name);	262	#if PERL_VERSION_ATLEAST (5,9,0)
		263	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		264	#else
		265	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		266	#endif
		267	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		268	--AvFILLp (padlist);
		269
		270	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
142	av_store (newpadlist, 1, (SV *) newpad);	271	av_store (newpadlist, 1, (SV *)newpad);
143		272
144	av = newAV (); /* will be @_ */	273	return newpadlist;
145	av_extend (av, 0);	274	}
146	av_store (newpad, 0, (SV *) av);
147	AvFLAGS (av) = AVf_REIFY;
148		275
149	for (ix = fpad; ix > 0; ix--)	276	static void
		277	free_padlist (pTHX_ AV *padlist)
		278	{
		279	/* may be during global destruction */
		280	if (SvREFCNT (padlist))
150	{	281	{
151	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	282	I32 i = AvFILLp (padlist);
152	if (namesv && namesv != &PL_sv_undef)	283	while (i >= 0)
153	{	284	{
154	char *name = SvPVX (namesv); /* XXX */	285	SV **svp = av_fetch (padlist, i--, FALSE);
155	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	286	if (svp)
156	{ /* lexical from outside? */
157	npad[ix] = SvREFCNT_inc (ppad[ix]);
158	}	287	{
159	else
160	{ /* our own lexical */
161	SV *sv;	288	SV *sv;
162	if (*name == '&')	289	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
163	sv = SvREFCNT_inc (ppad[ix]);	290	SvREFCNT_dec (sv);
164	else if (*name == '@')	291
165	sv = (SV *) newAV ();	292	SvREFCNT_dec (*svp);
166	else if (*name == '%')
167	sv = (SV *) newHV ();
168	else
169	sv = NEWSV (0, 0);
170	if (!SvPADBUSY (sv))
171	SvPADMY_on (sv);
172	npad[ix] = sv;
173	}	293	}
174	}	294	}
175	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
176	{
177	npad[ix] = SvREFCNT_inc (ppad[ix]);
178	}
179	else
180	{
181	SV *sv = NEWSV (0, 0);
182	SvPADTMP_on (sv);
183	npad[ix] = sv;
184	}
185	}
186		295
187	#if 0 /* return -ENOTUNDERSTOOD */
188	/* Now that vars are all in place, clone nested closures. */
189
190	for (ix = fpad; ix > 0; ix--) {
191	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
192	if (namesv
193	&& namesv != &PL_sv_undef
194	&& !(SvFLAGS(namesv) & SVf_FAKE)
195	&& *SvPVX(namesv) == '&'
196	&& CvCLONE(ppad[ix]))
197	{
198	CV *kid = cv_clone((CV*)ppad[ix]);
199	SvREFCNT_dec(ppad[ix]);
200	CvCLONE_on(kid);
201	SvPADMY_on(kid);
202	npad[ix] = (SV*)kid;
203	}
204	}
205	#endif
206
207	return newpadlist;
208	}
209
210	#ifdef MAY_FLUSH
211	STATIC AV *
212	free_padlist (AV *padlist)
213	{
214	/* may be during global destruction */
215	if (SvREFCNT(padlist))
216	{
217	I32 i = AvFILLp(padlist);
218	while (i >= 0)
219	{
220	SV **svp = av_fetch(padlist, i--, FALSE);
221	SV *sv = svp ? *svp : Nullsv;
222	if (sv)
223	SvREFCNT_dec(sv);
224	}
225
226	SvREFCNT_dec((SV*)padlist);	296	SvREFCNT_dec ((SV*)padlist);
227	}	297	}
228	}	298	}
229	#endif	299
		300	static int
		301	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		302	{
		303	AV *padlist;
		304	AV *av = (AV *)mg->mg_obj;
		305
		306	/* casting is fun. */
		307	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
		308	free_padlist (aTHX_ padlist);
		309
		310	SvREFCNT_dec (av);
		311
		312	return 0;
		313	}
		314
		315	#define PERL_MAGIC_coro PERL_MAGIC_ext
		316
		317	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		318
		319	#define CORO_MAGIC(cv) \
		320	SvMAGIC (cv) \
		321	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		322	? SvMAGIC (cv) \
		323	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		324	: 0
		325
		326	static struct coro *
		327	SvSTATE_ (pTHX_ SV *coro)
		328	{
		329	HV *stash;
		330	MAGIC *mg;
		331
		332	if (SvROK (coro))
		333	coro = SvRV (coro);
		334
		335	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		336	croak ("Coro::State object required");
		337
		338	stash = SvSTASH (coro);
		339	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		340	{
		341	/* very slow, but rare, check */
		342	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		343	croak ("Coro::State object required");
		344	}
		345
		346	mg = CORO_MAGIC (coro);
		347	return (struct coro *)mg->mg_ptr;
		348	}
		349
		350	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
230		351
231	/* the next two functions merely cache the padlists */	352	/* the next two functions merely cache the padlists */
232	STATIC void	353	static void
233	get_padlist (CV *cv)	354	get_padlist (pTHX_ CV *cv)
234	{	355	{
235	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);	356	MAGIC *mg = CORO_MAGIC (cv);
		357	AV *av;
236		358
237	if (he && AvFILLp ((AV *)*he) >= 0)	359	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
238	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);	360	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
239	else	361	else
240	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
241	}
242
243	STATIC void
244	put_padlist (CV *cv)
245	{
246	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);
247
248	if (SvTYPE (*he) != SVt_PVAV)
249	{	362	{
		363	#if CORO_PREFER_PERL_FUNCTIONS
		364	/* this is probably cleaner, but also slower? */
		365	CV *cp = Perl_cv_clone (cv);
		366	CvPADLIST (cv) = CvPADLIST (cp);
		367	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (*he);	368	SvREFCNT_dec (cp);
251	*he = (SV *)newAV ();	369	#else
		370	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		371	#endif
252	}	372	}
253
254	av_push ((AV *)*he, (SV *)CvPADLIST (cv));
255	}	373	}
256		374
257	#ifdef MAY_FLUSH	375	static void
258	STATIC void	376	put_padlist (pTHX_ CV *cv)
259	flush_padlist_cache ()
260	{	377	{
261	HV *hv = padlist_cache;	378	MAGIC *mg = CORO_MAGIC (cv);
262	padlist_cache = newHV ();	379	AV *av;
263		380
264	if (hv_iterinit (hv))	381	if (expect_false (!mg))
265	{
266	HE *he;
267	AV *padlist;
268
269	while (!!(he = hv_iternext (hv)))
270	{
271	AV *av = (AV *)HeVAL(he);
272
273	/* casting is fun. */
274	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275	free_padlist (padlist);
276	}
277	}	382	{
		383	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		384	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		385	mg->mg_virtual = &vtbl_coro;
		386	mg->mg_obj = (SV *)newAV ();
		387	}
278		388
279	SvREFCNT_dec (hv);	389	av = (AV *)mg->mg_obj;
280	}
281	#endif
282		390
283	#define SB do {	391	if (expect_false (AvFILLp (av) >= AvMAX (av)))
284	#define SE } while (0)	392	av_extend (av, AvMAX (av) + 1);
285		393
286	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	394	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
287	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	395	}
288		396
289	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	397	/** load & save, init *******************************************************/
290		398
291	static void	399	static void
292	load_state(pTHX_ Coro__State c)	400	load_perl (pTHX_ Coro__State c)
293	{	401	{
294	PL_dowarn = c->dowarn;	402	#define VAR(name,type) PL_ ## name = c->name;
		403	# include "state.h"
		404	#undef VAR
295		405
296	PL_curstackinfo = c->curstackinfo;	406	GvSV (PL_defgv) = c->defsv;
297	PL_curstack = c->curstack;	407	GvAV (PL_defgv) = c->defav;
298	PL_mainstack = c->mainstack;	408	GvSV (PL_errgv) = c->errsv;
299	PL_stack_sp = c->stack_sp;	409	GvSV (irsgv) = c->irssv_sv;
300	PL_op = c->op;
301	PL_curpad = c->curpad;
302	PL_stack_base = c->stack_base;
303	PL_stack_max = c->stack_max;
304	PL_tmps_stack = c->tmps_stack;
305	PL_tmps_floor = c->tmps_floor;
306	PL_tmps_ix = c->tmps_ix;
307	PL_tmps_max = c->tmps_max;
308	PL_markstack = c->markstack;
309	PL_markstack_ptr = c->markstack_ptr;
310	PL_markstack_max = c->markstack_max;
311	PL_scopestack = c->scopestack;
312	PL_scopestack_ix = c->scopestack_ix;
313	PL_scopestack_max = c->scopestack_max;
314	PL_savestack = c->savestack;
315	PL_savestack_ix = c->savestack_ix;
316	PL_savestack_max = c->savestack_max;
317	PL_retstack = c->retstack;
318	PL_retstack_ix = c->retstack_ix;
319	PL_retstack_max = c->retstack_max;
320	PL_curcop = c->curcop;
321	PL_start_env = c->start_env;
322	PL_top_env = c->top_env;
323
324	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
325	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
326	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
327		410
328	{	411	{
329	dSP;	412	dSP;
330	CV *cv;	413	CV *cv;
331		414
332	/* now do the ugly restore mess */	415	/* now do the ugly restore mess */
333	while ((cv = (CV *)POPs))	416	while (expect_true (cv = (CV *)POPs))
334	{	417	{
335	AV *padlist = (AV *)POPs;
336
337	if (padlist)
338	{
339	put_padlist (cv); /* mark this padlist as available */	418	put_padlist (aTHX_ cv); /* mark this padlist as available */
340	CvPADLIST(cv) = padlist;	419	CvDEPTH (cv) = PTR2IV (POPs);
341	#ifdef USE_THREADS	420	CvPADLIST (cv) = (AV *)POPs;
342	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
343	#endif
344	}
345
346	++CvDEPTH(cv);
347	}	421	}
348		422
349	PUTBACK;	423	PUTBACK;
350	}	424	}
351	}	425	}
352		426
353	static void	427	static void
354	save_state(pTHX_ Coro__State c, int flags)	428	save_perl (pTHX_ Coro__State c)
355	{	429	{
356	{	430	{
357	dSP;	431	dSP;
358	I32 cxix = cxstack_ix;	432	I32 cxix = cxstack_ix;
359	PERL_CONTEXT *ccstk = cxstack;	433	PERL_CONTEXT *ccstk = cxstack;
…		…
362	/*	436	/*
363	* the worst thing you can imagine happens first - we have to save	437	* the worst thing you can imagine happens first - we have to save
364	* (and reinitialize) all cv's in the whole callchain :(	438	* (and reinitialize) all cv's in the whole callchain :(
365	*/	439	*/
366		440
367	PUSHs (Nullsv);	441	XPUSHs (Nullsv);
368	/* this loop was inspired by pp_caller */	442	/* this loop was inspired by pp_caller */
369	for (;;)	443	for (;;)
370	{	444	{
371	do	445	while (expect_true (cxix >= 0))
372	{	446	{
373	PERL_CONTEXT *cx = &ccstk[cxix--];	447	PERL_CONTEXT *cx = &ccstk[cxix--];
374		448
375	if (CxTYPE(cx) == CXt_SUB)	449	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
376	{	450	{
377	CV *cv = cx->blk_sub.cv;	451	CV *cv = cx->blk_sub.cv;
		452
378	if (CvDEPTH(cv))	453	if (expect_true (CvDEPTH (cv)))
379	{	454	{
380	#ifdef USE_THREADS
381	/*XPUSHs ((SV *)CvOWNER(cv));*/
382	/*CvOWNER(cv) = 0;*/
383	/*error must unlock this cv etc.. etc...*/
384	#endif
385	EXTEND (SP, CvDEPTH(cv)*2);	455	EXTEND (SP, 3);
386
387	while (--CvDEPTH(cv))
388	{
389	/* this tells the restore code to increment CvDEPTH */
390	PUSHs (Nullsv);
391	PUSHs ((SV *)cv);
392	}
393
394	PUSHs ((SV *)CvPADLIST(cv));	456	PUSHs ((SV *)CvPADLIST (cv));
		457	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
395	PUSHs ((SV *)cv);	458	PUSHs ((SV *)cv);
396		459
397	get_padlist (cv); /* this is a monster */	460	CvDEPTH (cv) = 0;
		461	get_padlist (aTHX_ cv);
398	}	462	}
399	}	463	}
400	else if (CxTYPE(cx) == CXt_FORMAT)
401	{
402	/* I never used formats, so how should I know how these are implemented? */
403	/* my bold guess is as a simple, plain sub... */
404	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
405	}
406	}	464	}
407	while (cxix >= 0);
408		465
409	if (top_si->si_type == PERLSI_MAIN)	466	if (expect_true (top_si->si_type == PERLSI_MAIN))
410	break;	467	break;
411		468
412	top_si = top_si->si_prev;	469	top_si = top_si->si_prev;
413	ccstk = top_si->si_cxstack;	470	ccstk = top_si->si_cxstack;
414	cxix = top_si->si_cxix;	471	cxix = top_si->si_cxix;
415	}	472	}
416		473
417	PUTBACK;	474	PUTBACK;
418	}	475	}
419		476
420	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	477	c->defav = GvAV (PL_defgv);
421	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	478	c->defsv = DEFSV;
422	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	479	c->errsv = ERRSV;
		480	c->irssv_sv = GvSV (irsgv);
423		481
424	/* I have not the slightest idea of why av_reify is necessary */	482	#define VAR(name,type)c->name = PL_ ## name;
425	/* but if it's missing the defav contents magically get replaced sometimes */	483	# include "state.h"
426	if (c->defav)	484	#undef VAR
427	av_reify (c->defav);
428
429	c->dowarn = PL_dowarn;
430
431	c->curstackinfo = PL_curstackinfo;
432	c->curstack = PL_curstack;
433	c->mainstack = PL_mainstack;
434	c->stack_sp = PL_stack_sp;
435	c->op = PL_op;
436	c->curpad = PL_curpad;
437	c->stack_base = PL_stack_base;
438	c->stack_max = PL_stack_max;
439	c->tmps_stack = PL_tmps_stack;
440	c->tmps_floor = PL_tmps_floor;
441	c->tmps_ix = PL_tmps_ix;
442	c->tmps_max = PL_tmps_max;
443	c->markstack = PL_markstack;
444	c->markstack_ptr = PL_markstack_ptr;
445	c->markstack_max = PL_markstack_max;
446	c->scopestack = PL_scopestack;
447	c->scopestack_ix = PL_scopestack_ix;
448	c->scopestack_max = PL_scopestack_max;
449	c->savestack = PL_savestack;
450	c->savestack_ix = PL_savestack_ix;
451	c->savestack_max = PL_savestack_max;
452	c->retstack = PL_retstack;
453	c->retstack_ix = PL_retstack_ix;
454	c->retstack_max = PL_retstack_max;
455	c->curcop = PL_curcop;
456	c->start_env = PL_start_env;
457	c->top_env = PL_top_env;
458	}	485	}
459		486
460	/*	487	/*
461	* allocate various perl stacks. This is an exact copy	488	* allocate various perl stacks. This is an exact copy
462	* of perl.c:init_stacks, except that it uses less memory	489	* of perl.c:init_stacks, except that it uses less memory
463	* on the assumption that coroutines do not usually need	490	* on the (sometimes correct) assumption that coroutines do
464	* a lot of stackspace.	491	* not usually need a lot of stackspace.
465	*/	492	*/
466	STATIC void	493	#if CORO_PREFER_PERL_FUNCTIONS
		494	# define coro_init_stacks init_stacks
		495	#else
		496	static void
467	coro_init_stacks (pTHX)	497	coro_init_stacks (pTHX)
468	{	498	{
469	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	499	PL_curstackinfo = new_stackinfo(64, 6);
470	PL_curstackinfo->si_type = PERLSI_MAIN;	500	PL_curstackinfo->si_type = PERLSI_MAIN;
471	PL_curstack = PL_curstackinfo->si_stack;	501	PL_curstack = PL_curstackinfo->si_stack;
472	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	502	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
473		503
474	PL_stack_base = AvARRAY(PL_curstack);	504	PL_stack_base = AvARRAY(PL_curstack);
475	PL_stack_sp = PL_stack_base;	505	PL_stack_sp = PL_stack_base;
476	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	506	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
477		507
478	New(50,PL_tmps_stack,96,SV*);	508	New(50,PL_tmps_stack,64,SV*);
479	PL_tmps_floor = -1;	509	PL_tmps_floor = -1;
480	PL_tmps_ix = -1;	510	PL_tmps_ix = -1;
481	PL_tmps_max = 96;	511	PL_tmps_max = 64;
482		512
483	New(54,PL_markstack,16,I32);	513	New(54,PL_markstack,16,I32);
484	PL_markstack_ptr = PL_markstack;	514	PL_markstack_ptr = PL_markstack;
485	PL_markstack_max = PL_markstack + 16;	515	PL_markstack_max = PL_markstack + 16;
486		516
		517	#ifdef SET_MARK_OFFSET
487	SET_MARK_OFFSET;	518	SET_MARK_OFFSET;
		519	#endif
488		520
489	New(54,PL_scopestack,16,I32);	521	New(54,PL_scopestack,16,I32);
490	PL_scopestack_ix = 0;	522	PL_scopestack_ix = 0;
491	PL_scopestack_max = 16;	523	PL_scopestack_max = 16;
492		524
493	New(54,PL_savestack,96,ANY);	525	New(54,PL_savestack,64,ANY);
494	PL_savestack_ix = 0;	526	PL_savestack_ix = 0;
495	PL_savestack_max = 96;	527	PL_savestack_max = 64;
496		528
		529	#if !PERL_VERSION_ATLEAST (5,9,0)
497	New(54,PL_retstack,8,OP*);	530	New(54,PL_retstack,4,OP*);
498	PL_retstack_ix = 0;	531	PL_retstack_ix = 0;
499	PL_retstack_max = 8;	532	PL_retstack_max = 4;
		533	#endif
500	}	534	}
		535	#endif
501		536
502	/*	537	/*
503	* destroy the stacks, the callchain etc...	538	* destroy the stacks, the callchain etc...
504	* still there is a memleak of 128 bytes...
505	*/	539	*/
506	STATIC void	540	static void
507	destroy_stacks(pTHX)	541	coro_destroy_stacks (pTHX)
508	{	542	{
509	/* is this ugly, I ask? */
510	while (PL_scopestack_ix)
511	LEAVE;
512
513	/* sure it is, but more important: is it correct?? :/ */
514	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
515	FREETMPS;
516
517	while (PL_curstackinfo->si_next)	543	while (PL_curstackinfo->si_next)
518	PL_curstackinfo = PL_curstackinfo->si_next;	544	PL_curstackinfo = PL_curstackinfo->si_next;
519		545
520	while (PL_curstackinfo)	546	while (PL_curstackinfo)
521	{	547	{
522	PERL_SI *p = PL_curstackinfo->si_prev;	548	PERL_SI *p = PL_curstackinfo->si_prev;
523		549
524	{	550	if (!IN_DESTRUCT)
525	dSP;
526	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
527	PUTBACK; /* possibly superfluous */
528	}
529
530	dounwind(-1);
531
532	SvREFCNT_dec(PL_curstackinfo->si_stack);	551	SvREFCNT_dec (PL_curstackinfo->si_stack);
		552
533	Safefree(PL_curstackinfo->si_cxstack);	553	Safefree (PL_curstackinfo->si_cxstack);
534	Safefree(PL_curstackinfo);	554	Safefree (PL_curstackinfo);
535	PL_curstackinfo = p;	555	PL_curstackinfo = p;
536	}	556	}
537		557
538	Safefree(PL_tmps_stack);	558	Safefree (PL_tmps_stack);
539	Safefree(PL_markstack);	559	Safefree (PL_markstack);
540	Safefree(PL_scopestack);	560	Safefree (PL_scopestack);
541	Safefree(PL_savestack);	561	Safefree (PL_savestack);
		562	#if !PERL_VERSION_ATLEAST (5,9,0)
542	Safefree(PL_retstack);	563	Safefree (PL_retstack);
543	}
544
545	static void
546	allocate_stack (Coro__State ctx, int alloc)
547	{
548	coro_stack *stack;
549
550	New (0, stack, 1, coro_stack);
551
552	stack->refcnt = 1;
553	stack->usecnt = 1;
554	stack->gencnt = ctx->gencnt = 0;
555	if (alloc)
556	{
557	#ifdef HAVE_MMAP
558	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write */
559	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
560	if (stack->sptr == (void *)-1)
561	#endif	564	#endif
		565	}
		566
		567	static size_t
		568	coro_rss (pTHX_ struct coro *coro)
		569	{
		570	size_t rss = sizeof (*coro);
		571
		572	if (coro->mainstack)
		573	{
		574	if (coro->flags & CF_RUNNING)
562	{	575	{
563	/*FIXME*//*D*//* reasonable stack size! */	576	#define VAR(name,type)coro->name = PL_ ## name;
564	stack->ssize = -4096 * sizeof (long);	577	# include "state.h"
565	New (0, stack->sptr, 4096, long);	578	#undef VAR
566	}	579	}
567	}
568	else
569	stack->sptr = 0;
570		580
571	ctx->stack = stack;	581	rss += sizeof (coro->curstackinfo);
572	}	582	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		583	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		584	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		585	rss += coro->tmps_max * sizeof (SV *);
		586	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		587	rss += coro->scopestack_max * sizeof (I32);
		588	rss += coro->savestack_max * sizeof (ANY);
573		589
574	static void	590	#if !PERL_VERSION_ATLEAST (5,9,0)
575	deallocate_stack (Coro__State ctx)	591	rss += coro->retstack_max * sizeof (OP *);
576	{	592	#endif
577	coro_stack *stack = ctx->stack;
578
579	ctx->stack = 0;
580
581	if (stack)
582	{	593	}
583	if (!--stack->refcnt)
584	{
585	#ifdef HAVE_MMAP
586	if (stack->ssize > 0 && stack->sptr)
587	munmap (stack->sptr, stack->ssize);
588	else
589	#else
590	Safefree (stack->sptr);
591	#endif
592	Safefree (stack);
593	}
594	else if (ctx->gencnt == stack->gencnt)
595	--stack->usecnt;
596	}
597	}
598		594
		595	return rss;
		596	}
		597
		598	/** coroutine stack handling ************************************************/
		599
599	static void	600	static void
600	setup_coro (void *arg)	601	coro_setup (pTHX_ struct coro *coro)
601	{	602	{
602	/*	603	/*
603	* emulate part of the perl startup here.	604	* emulate part of the perl startup here.
604	*/	605	*/
		606	coro_init_stacks (aTHX);
		607
		608	PL_runops = RUNOPS_DEFAULT;
		609	PL_curcop = &PL_compiling;
		610	PL_in_eval = EVAL_NULL;
		611	PL_comppad = 0;
		612	PL_curpm = 0;
		613	PL_curpad = 1;
		614	PL_localizing = 0;
		615	PL_dirty = 0;
		616	PL_restartop = 0;
		617
		618	GvSV (PL_defgv) = newSV (0);
		619	GvAV (PL_defgv) = coro->args; coro->args = 0;
		620	GvSV (PL_errgv) = newSV (0);
		621	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		622	PL_rs = newSVsv (GvSV (irsgv));
		623	PL_defoutgv = SvREFCNT_inc (stdoutgv);
		624
		625	{
		626	dSP;
		627	LOGOP myop;
		628
		629	Zero (&myop, 1, LOGOP);
		630	myop.op_next = Nullop;
		631	myop.op_flags = OPf_WANT_VOID;
		632
		633	PUSHMARK (SP);
		634	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		635	PUTBACK;
		636	PL_op = (OP *)&myop;
		637	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		638	SPAGAIN;
		639	}
		640
		641	ENTER; /* necessary e.g. for dounwind and to balance the xsub-entersub */
		642	}
		643
		644	static void
		645	coro_destroy (pTHX_ struct coro *coro)
		646	{
		647	if (!IN_DESTRUCT)
		648	{
		649	/* restore all saved variables and stuff */
		650	LEAVE_SCOPE (0);
		651	assert (PL_tmps_floor == -1);
		652
		653	/* free all temporaries */
		654	FREETMPS;
		655	assert (PL_tmps_ix == -1);
		656
		657	/* unwind all extra stacks */
		658	POPSTACK_TO (PL_mainstack);
		659
		660	/* unwind main stack */
		661	dounwind (-1);
		662	}
		663
		664	SvREFCNT_dec (GvSV (PL_defgv));
		665	SvREFCNT_dec (GvAV (PL_defgv));
		666	SvREFCNT_dec (GvSV (PL_errgv));
		667	SvREFCNT_dec (PL_defoutgv);
		668	SvREFCNT_dec (PL_rs);
		669	SvREFCNT_dec (GvSV (irsgv));
		670
		671	SvREFCNT_dec (coro->saved_deffh);
		672	//SvREFCNT_dec (coro->throw);
		673
		674	coro_destroy_stacks (aTHX);
		675	}
		676
		677	static void
		678	free_coro_mortal (pTHX)
		679	{
		680	if (expect_true (coro_mortal))
		681	{
		682	SvREFCNT_dec (coro_mortal);
		683	coro_mortal = 0;
		684	}
		685	}
		686
		687	static int
		688	runops_trace (pTHX)
		689	{
		690	COP *oldcop = 0;
		691	int oldcxix = -2;
		692	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		693	coro_cctx *cctx = coro->cctx;
		694
		695	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		696	{
		697	PERL_ASYNC_CHECK ();
		698
		699	if (cctx->flags & CC_TRACE_ALL)
		700	{
		701	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		702	{
		703	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		704	SV **bot, **top;
		705	AV *av = newAV (); /* return values */
		706	SV **cb;
		707	dSP;
		708
		709	GV *gv = CvGV (cx->blk_sub.cv);
		710	SV *fullname = sv_2mortal (newSV (0));
		711	if (isGV (gv))
		712	gv_efullname3 (fullname, gv, 0);
		713
		714	bot = PL_stack_base + cx->blk_oldsp + 1;
		715	top = cx->blk_gimme == G_ARRAY ? SP + 1
		716	: cx->blk_gimme == G_SCALAR ? bot + 1
		717	: bot;
		718
		719	av_extend (av, top - bot);
		720	while (bot < top)
		721	av_push (av, SvREFCNT_inc (*bot++));
		722
		723	PL_runops = RUNOPS_DEFAULT;
		724	ENTER;
		725	SAVETMPS;
		726	EXTEND (SP, 3);
		727	PUSHMARK (SP);
		728	PUSHs (&PL_sv_no);
		729	PUSHs (fullname);
		730	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		731	PUTBACK;
		732	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		733	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		734	SPAGAIN;
		735	FREETMPS;
		736	LEAVE;
		737	PL_runops = runops_trace;
		738	}
		739
		740	if (oldcop != PL_curcop)
		741	{
		742	oldcop = PL_curcop;
		743
		744	if (PL_curcop != &PL_compiling)
		745	{
		746	SV **cb;
		747
		748	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		749	{
		750	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		751
		752	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		753	{
		754	runops_proc_t old_runops = PL_runops;
		755	dSP;
		756	GV *gv = CvGV (cx->blk_sub.cv);
		757	SV *fullname = sv_2mortal (newSV (0));
		758
		759	if (isGV (gv))
		760	gv_efullname3 (fullname, gv, 0);
		761
		762	PL_runops = RUNOPS_DEFAULT;
		763	ENTER;
		764	SAVETMPS;
		765	EXTEND (SP, 3);
		766	PUSHMARK (SP);
		767	PUSHs (&PL_sv_yes);
		768	PUSHs (fullname);
		769	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		770	PUTBACK;
		771	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		772	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		773	SPAGAIN;
		774	FREETMPS;
		775	LEAVE;
		776	PL_runops = runops_trace;
		777	}
		778
		779	oldcxix = cxstack_ix;
		780	}
		781
		782	if (cctx->flags & CC_TRACE_LINE)
		783	{
		784	dSP;
		785
		786	PL_runops = RUNOPS_DEFAULT;
		787	ENTER;
		788	SAVETMPS;
		789	EXTEND (SP, 3);
		790	PL_runops = RUNOPS_DEFAULT;
		791	PUSHMARK (SP);
		792	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		793	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		794	PUTBACK;
		795	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		796	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		797	SPAGAIN;
		798	FREETMPS;
		799	LEAVE;
		800	PL_runops = runops_trace;
		801	}
		802	}
		803	}
		804	}
		805	}
		806
		807	TAINT_NOT;
		808	return 0;
		809	}
		810
		811	/* inject a fake call to Coro::State::_cctx_init into the execution */
		812	/* _cctx_init should be careful, as it could be called at almost any time */
		813	/* during execution of a perl program */
		814	static void NOINLINE
		815	prepare_cctx (pTHX_ coro_cctx *cctx)
		816	{
605	dSP;	817	dSP;
606	Coro__State ctx = (Coro__State)arg;	818	LOGOP myop;
607	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
608		819
609	coro_init_stacks (aTHX);	820	PL_top_env = &PL_start_env;
610	JMPENV_BOOTSTRAP;	821
		822	if (cctx->flags & CC_TRACE)
		823	PL_runops = runops_trace;
		824
		825	Zero (&myop, 1, LOGOP);
		826	myop.op_next = PL_op;
		827	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		828
		829	PUSHMARK (SP);
		830	EXTEND (SP, 2);
		831	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		832	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		833	PUTBACK;
		834	PL_op = (OP *)&myop;
		835	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
611	SPAGAIN;	836	SPAGAIN;
		837	}
612		838
613	/*PL_curcop = 0;*/	839	/*
614	SvREFCNT_dec (GvAV (PL_defgv));	840	* this is a _very_ stripped down perl interpreter ;)
615	GvAV (PL_defgv) = ctx->args;	841	*/
		842	static void
		843	coro_run (void *arg)
		844	{
		845	dTHX;
616		846
617	if (ctx->stack)	847	/* coro_run is the alternative tail of transfer(), so unlock here. */
618	{	848	UNLOCK;
619	ctx->cursp = 0;
620		849
621	PUSHMARK(SP);	850	/* we now skip the entersub that lead to transfer() */
622	PUTBACK;	851	PL_op = PL_op->op_next;
623	(void) call_sv (sub_init, G_VOID|G_NOARGS);	852
624	croak ("FATAL: CCTXT coroutine returned!");	853	/* inject a fake subroutine call to cctx_init */
		854	prepare_cctx (aTHX_ (coro_cctx *)arg);
		855
		856	/* somebody or something will hit me for both perl_run and PL_restartop */
		857	PL_restartop = PL_op;
		858	perl_run (PL_curinterp);
		859
		860	/*
		861	* If perl-run returns we assume exit() was being called or the coro
		862	* fell off the end, which seems to be the only valid (non-bug)
		863	* reason for perl_run to return. We try to exit by jumping to the
		864	* bootstrap-time "top" top_env, as we cannot restore the "main"
		865	* coroutine as Coro has no such concept
		866	*/
		867	PL_top_env = main_top_env;
		868	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		869	}
		870
		871	static coro_cctx *
		872	cctx_new ()
		873	{
		874	coro_cctx *cctx;
		875	void *stack_start;
		876	size_t stack_size;
		877
		878	++cctx_count;
		879
		880	Newz (0, cctx, 1, coro_cctx);
		881
		882	#if HAVE_MMAP
		883
		884	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		885	/* mmap supposedly does allocate-on-write for us */
		886	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		887
		888	if (cctx->sptr != (void *)-1)
		889	{
		890	# if CORO_STACKGUARD
		891	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		892	# endif
		893	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		894	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		895	cctx->flags |= CC_MAPPED;
625	}	896	}
626	else	897	else
627	{	898	#endif
628	UNOP myop;
629
630	PL_op = (OP *)&myop;
631
632	Zero(&myop, 1, UNOP);
633	myop.op_next = Nullop;
634	myop.op_flags = OPf_WANT_VOID;
635
636	PUSHMARK(SP);
637	XPUSHs (sub_init);
638	/*
639	* the next line is slightly wrong, as PL_op->op_next
640	* is actually being executed so we skip the first op.
641	* that doesn't matter, though, since it is only
642	* pp_nextstate and we never return...
643	* ah yes, and I don't care anyways ;)
644	*/
645	PUTBACK;
646	PL_op = pp_entersub();
647	SPAGAIN;
648
649	ENTER; /* necessary e.g. for dounwind */
650	}	899	{
651	}	900	cctx->ssize = coro_stacksize * (long)sizeof (long);
		901	New (0, cctx->sptr, coro_stacksize, long);
652		902
653	static void	903	if (!cctx->sptr)
654	continue_coro (void *arg)	904	{
655	{	905	perror ("FATAL: unable to allocate stack for coroutine");
656	/*	906	_exit (EXIT_FAILURE);
657	* this is a _very_ stripped down perl interpreter ;)	907	}
658	*/
659	Coro__State ctx = (Coro__State)arg;
660		908
661	ctx->cursp = 0;	909	stack_start = cctx->sptr;
662	PL_op = PL_op->op_next;	910	stack_size = cctx->ssize;
663	CALLRUNOPS(aTHX);	911	}
664	/*NORETURN*/
665	abort ();
666	}
667		912
668	STATIC void	913	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		914	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		915
		916	return cctx;
		917	}
		918
		919	static void
		920	cctx_destroy (coro_cctx *cctx)
		921	{
		922	if (!cctx)
		923	return;
		924
		925	--cctx_count;
		926
		927	#if CORO_USE_VALGRIND
		928	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		929	#endif
		930
		931	#if HAVE_MMAP
		932	if (cctx->flags & CC_MAPPED)
		933	munmap (cctx->sptr, cctx->ssize);
		934	else
		935	#endif
		936	Safefree (cctx->sptr);
		937
		938	Safefree (cctx);
		939	}
		940
		941	/* wether this cctx should be destructed */
		942	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		943
		944	static coro_cctx *
		945	cctx_get (pTHX)
		946	{
		947	while (expect_true (cctx_first))
		948	{
		949	coro_cctx *cctx = cctx_first;
		950	cctx_first = cctx->next;
		951	--cctx_idle;
		952
		953	if (expect_true (!CCTX_EXPIRED (cctx)))
		954	return cctx;
		955
		956	cctx_destroy (cctx);
		957	}
		958
		959	return cctx_new ();
		960	}
		961
		962	static void
		963	cctx_put (coro_cctx *cctx)
		964	{
		965	/* free another cctx if overlimit */
		966	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		967	{
		968	coro_cctx *first = cctx_first;
		969	cctx_first = first->next;
		970	--cctx_idle;
		971
		972	cctx_destroy (first);
		973	}
		974
		975	++cctx_idle;
		976	cctx->next = cctx_first;
		977	cctx_first = cctx;
		978	}
		979
		980	/** coroutine switching *****************************************************/
		981
		982	static void
		983	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		984	{
		985	if (expect_true (prev != next))
		986	{
		987	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		988	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		989
		990	if (expect_false (next->flags & CF_RUNNING))
		991	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		992
		993	if (expect_false (next->flags & CF_DESTROYED))
		994	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		995
		996	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		997	croak ("Coro::State::transfer called while parsing, but this is not supported");
		998	}
		999	}
		1000
		1001	/* always use the TRANSFER macro */
		1002	static void NOINLINE
669	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	1003	transfer (pTHX_ struct coro *prev, struct coro *next)
670	{	1004	{
671	dSP;
672	dSTACKLEVEL;	1005	dSTACKLEVEL;
673		1006
674	if (prev != next)	1007	/* sometimes transfer is only called to set idle_sp */
		1008	if (expect_false (!next))
		1009	{
		1010	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1011	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
675	{	1012	}
676	if (next->mainstack)	1013	else if (expect_true (prev != next))
		1014	{
		1015	coro_cctx *prev__cctx;
		1016
		1017	if (expect_false (prev->flags & CF_NEW))
677	{	1018	{
678	SAVE (prev, flags);	1019	/* create a new empty context */
679	LOAD (next);	1020	Newz (0, prev->cctx, 1, coro_cctx);
680		1021	prev->flags &= ~CF_NEW;
681	/* mark this state as in-use */	1022	prev->flags |= CF_RUNNING;
682	next->mainstack = 0;
683	next->tmps_ix = -2;
684
685	/* stacklevel changed? if yes, grab the stack for us! */
686	if (flags & TRANSFER_SAVE_CCTXT)
687	{
688	if (!prev->stack)
689	allocate_stack (prev, 0);
690	else if (prev->cursp != stacklevel
691	&& prev->stack->usecnt > 1)
692	{
693	prev->gencnt = ++prev->stack->gencnt;
694	prev->stack->usecnt = 1;
695	}
696
697	/* has our stack been invalidated? */
698	if (next->stack && next->stack->gencnt != next->gencnt)
699	{
700	deallocate_stack (next);
701	allocate_stack (next, 1);
702	coro_create (&(next->stack->cctx),
703	continue_coro, (void *)next,
704	next->stack->sptr, labs (next->stack->ssize));
705	}
706
707	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
708	}
709
710	}	1023	}
711	else if (next->tmps_ix == -2)	1024
712	croak ("tried to transfer to running coroutine");	1025	prev->flags &= ~CF_RUNNING;
		1026	next->flags |= CF_RUNNING;
		1027
		1028	LOCK;
		1029
		1030	if (expect_false (next->flags & CF_NEW))
		1031	{
		1032	/* need to start coroutine */
		1033	next->flags &= ~CF_NEW;
		1034	/* first get rid of the old state */
		1035	save_perl (aTHX_ prev);
		1036	/* setup coroutine call */
		1037	coro_setup (aTHX_ next);
		1038	}
713	else	1039	else
714	{	1040	{
715	SAVE (prev, -1); /* first get rid of the old state */	1041	/* coroutine already started */
716		1042	save_perl (aTHX_ prev);
717	if (flags & TRANSFER_SAVE_CCTXT)	1043	load_perl (aTHX_ next);
718	{
719	if (!prev->stack)
720	allocate_stack (prev, 0);
721
722	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
723	{
724	setup_coro (next);
725
726	prev->stack->refcnt++;
727	prev->stack->usecnt++;
728	next->stack = prev->stack;
729	next->gencnt = prev->gencnt;
730	}
731	else
732	{
733	allocate_stack (next, 1);
734	coro_create (&(next->stack->cctx),
735	setup_coro, (void *)next,
736	next->stack->sptr, labs (next->stack->ssize));
737	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
738	}
739	}
740	else
741	setup_coro (next);
742	}	1044	}
		1045
		1046	prev__cctx = prev->cctx;
		1047
		1048	/* possibly "free" the cctx */
		1049	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1050	{
		1051	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1052	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1053
		1054	prev->cctx = 0;
		1055
		1056	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1057	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1058	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1059	next->cctx = cctx_get (aTHX);
		1060
		1061	cctx_put (prev__cctx);
		1062	}
		1063
		1064	++next->usecount;
		1065
		1066	if (expect_true (!next->cctx))
		1067	next->cctx = cctx_get (aTHX);
		1068
		1069	if (expect_false (prev__cctx != next->cctx))
		1070	{
		1071	prev__cctx->top_env = PL_top_env;
		1072	PL_top_env = next->cctx->top_env;
		1073	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1074	}
		1075
		1076	free_coro_mortal (aTHX);
		1077	UNLOCK;
		1078	}
		1079	}
		1080
		1081	struct transfer_args
		1082	{
		1083	struct coro *prev, *next;
		1084	};
		1085
		1086	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1087	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1088
		1089	/** high level stuff ********************************************************/
		1090
		1091	static int
		1092	coro_state_destroy (pTHX_ struct coro *coro)
		1093	{
		1094	if (coro->flags & CF_DESTROYED)
		1095	return 0;
		1096
		1097	coro->flags |= CF_DESTROYED;
		1098
		1099	if (coro->flags & CF_READY)
743	}	1100	{
		1101	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1102	/* alternative: look through all ready queues and remove the coro */
		1103	LOCK;
		1104	--coro_nready;
		1105	UNLOCK;
		1106	}
		1107	else
		1108	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
744		1109
745	next->cursp = stacklevel;	1110	if (coro->mainstack && coro->mainstack != main_mainstack)
746	}	1111	{
		1112	struct coro temp;
747		1113
		1114	if (coro->flags & CF_RUNNING)
		1115	croak ("FATAL: tried to destroy currently running coroutine");
		1116
		1117	save_perl (aTHX_ &temp);
		1118	load_perl (aTHX_ coro);
		1119
		1120	coro_destroy (aTHX_ coro);
		1121
		1122	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1123
		1124	coro->mainstack = 0;
		1125	}
		1126
		1127	cctx_destroy (coro->cctx);
		1128	SvREFCNT_dec (coro->args);
		1129
		1130	if (coro->next) coro->next->prev = coro->prev;
		1131	if (coro->prev) coro->prev->next = coro->next;
		1132	if (coro == coro_first) coro_first = coro->next;
		1133
		1134	return 1;
		1135	}
		1136
		1137	static int
		1138	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1139	{
		1140	struct coro *coro = (struct coro *)mg->mg_ptr;
		1141	mg->mg_ptr = 0;
		1142
		1143	coro->hv = 0;
		1144
		1145	if (--coro->refcnt < 0)
		1146	{
		1147	coro_state_destroy (aTHX_ coro);
		1148	Safefree (coro);
		1149	}
		1150
		1151	return 0;
		1152	}
		1153
		1154	static int
		1155	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1156	{
		1157	struct coro *coro = (struct coro *)mg->mg_ptr;
		1158
		1159	++coro->refcnt;
		1160
		1161	return 0;
		1162	}
		1163
		1164	static MGVTBL coro_state_vtbl = {
		1165	0, 0, 0, 0,
		1166	coro_state_free,
		1167	0,
		1168	#ifdef MGf_DUP
		1169	coro_state_dup,
		1170	#else
		1171	# define MGf_DUP 0
		1172	#endif
		1173	};
		1174
		1175	static void
		1176	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1177	{
		1178	ta->prev = SvSTATE (prev_sv);
		1179	ta->next = SvSTATE (next_sv);
		1180	TRANSFER_CHECK (*ta);
		1181	}
		1182
		1183	static void
		1184	api_transfer (SV *prev_sv, SV *next_sv)
		1185	{
		1186	dTHX;
		1187	struct transfer_args ta;
		1188
		1189	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1190	TRANSFER (ta);
		1191	}
		1192
		1193	/** Coro ********************************************************************/
		1194
		1195	static void
		1196	coro_enq (pTHX_ SV *coro_sv)
		1197	{
		1198	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1199	}
		1200
		1201	static SV *
		1202	coro_deq (pTHX_ int min_prio)
		1203	{
		1204	int prio = PRIO_MAX - PRIO_MIN;
		1205
		1206	min_prio -= PRIO_MIN;
		1207	if (min_prio < 0)
		1208	min_prio = 0;
		1209
		1210	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		1211	if (AvFILLp (coro_ready [prio]) >= 0)
		1212	return av_shift (coro_ready [prio]);
		1213
		1214	return 0;
		1215	}
		1216
		1217	static int
		1218	api_ready (SV *coro_sv)
		1219	{
		1220	dTHX;
		1221	struct coro *coro;
		1222
		1223	if (SvROK (coro_sv))
		1224	coro_sv = SvRV (coro_sv);
		1225
		1226	coro = SvSTATE (coro_sv);
		1227
		1228	if (coro->flags & CF_READY)
		1229	return 0;
		1230
		1231	coro->flags |= CF_READY;
		1232
		1233	LOCK;
		1234	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1235	++coro_nready;
		1236	UNLOCK;
		1237
		1238	return 1;
		1239	}
		1240
		1241	static int
		1242	api_is_ready (SV *coro_sv)
		1243	{
		1244	dTHX;
		1245	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1246	}
		1247
		1248	static void
		1249	prepare_schedule (pTHX_ struct transfer_args *ta)
		1250	{
		1251	SV *prev_sv, *next_sv;
		1252
		1253	for (;;)
		1254	{
		1255	LOCK;
		1256	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1257
		1258	/* nothing to schedule: call the idle handler */
		1259	if (expect_false (!next_sv))
		1260	{
		1261	dSP;
		1262	UNLOCK;
		1263
		1264	ENTER;
		1265	SAVETMPS;
		1266
		1267	PUSHMARK (SP);
		1268	PUTBACK;
		1269	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1270
		1271	FREETMPS;
		1272	LEAVE;
		1273	continue;
		1274	}
		1275
		1276	ta->next = SvSTATE (next_sv);
		1277
		1278	/* cannot transfer to destroyed coros, skip and look for next */
		1279	if (expect_false (ta->next->flags & CF_DESTROYED))
		1280	{
		1281	UNLOCK;
		1282	SvREFCNT_dec (next_sv);
		1283	/* coro_nready is already taken care of by destroy */
		1284	continue;
		1285	}
		1286
		1287	--coro_nready;
		1288	UNLOCK;
		1289	break;
		1290	}
		1291
		1292	/* free this only after the transfer */
		1293	prev_sv = SvRV (coro_current);
		1294	ta->prev = SvSTATE (prev_sv);
		1295	TRANSFER_CHECK (*ta);
		1296	assert (ta->next->flags & CF_READY);
		1297	ta->next->flags &= ~CF_READY;
		1298	SvRV_set (coro_current, next_sv);
		1299
		1300	LOCK;
		1301	free_coro_mortal (aTHX);
		1302	coro_mortal = prev_sv;
		1303	UNLOCK;
		1304	}
		1305
		1306	static void
		1307	prepare_cede (pTHX_ struct transfer_args *ta)
		1308	{
		1309	api_ready (coro_current);
		1310	prepare_schedule (aTHX_ ta);
		1311	}
		1312
		1313	static int
		1314	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1315	{
		1316	if (coro_nready)
		1317	{
		1318	SV *prev = SvRV (coro_current);
		1319	prepare_schedule (aTHX_ ta);
		1320	api_ready (prev);
		1321	return 1;
		1322	}
		1323	else
		1324	return 0;
		1325	}
		1326
		1327	static void
		1328	api_schedule (void)
		1329	{
		1330	dTHX;
		1331	struct transfer_args ta;
		1332
		1333	prepare_schedule (aTHX_ &ta);
		1334	TRANSFER (ta);
		1335	}
		1336
		1337	static int
		1338	api_cede (void)
		1339	{
		1340	dTHX;
		1341	struct transfer_args ta;
		1342
		1343	prepare_cede (aTHX_ &ta);
		1344
		1345	if (expect_true (ta.prev != ta.next))
		1346	{
		1347	TRANSFER (ta);
		1348	return 1;
		1349	}
		1350	else
		1351	return 0;
		1352	}
		1353
		1354	static int
		1355	api_cede_notself (void)
		1356	{
		1357	dTHX;
		1358	struct transfer_args ta;
		1359
		1360	if (prepare_cede_notself (aTHX_ &ta))
		1361	{
		1362	TRANSFER (ta);
		1363	return 1;
		1364	}
		1365	else
		1366	return 0;
		1367	}
		1368
		1369	static void
		1370	api_trace (SV *coro_sv, int flags)
		1371	{
		1372	dTHX;
		1373	struct coro *coro = SvSTATE (coro_sv);
		1374
		1375	if (flags & CC_TRACE)
		1376	{
		1377	if (!coro->cctx)
		1378	coro->cctx = cctx_new ();
		1379	else if (!(coro->cctx->flags & CC_TRACE))
		1380	croak ("cannot enable tracing on coroutine with custom stack");
		1381
		1382	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1383	}
		1384	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1385	{
		1386	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1387
		1388	if (coro->flags & CF_RUNNING)
		1389	PL_runops = RUNOPS_DEFAULT;
		1390	else
		1391	coro->runops = RUNOPS_DEFAULT;
		1392	}
		1393	}
		1394
748	MODULE = Coro::State PACKAGE = Coro::State	1395	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
749		1396
750	PROTOTYPES: ENABLE	1397	PROTOTYPES: DISABLE
751		1398
752	BOOT:	1399	BOOT:
753	{ /* {} necessary for stoopid perl-5.6.x */	1400	{
754	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1401	#ifdef USE_ITHREADS
755	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1402	MUTEX_INIT (&coro_mutex);
		1403	#endif
		1404	BOOT_PAGESIZE;
		1405
		1406	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1407	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1408
756	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1409	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
757		1410
758	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1411	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
759	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1412	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
760	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1413	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
761	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1414	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
762
763	if (!padlist_cache)
764	padlist_cache = newHV ();
765		1415
766	main_mainstack = PL_mainstack;	1416	main_mainstack = PL_mainstack;
767	}	1417	main_top_env = PL_top_env;
768		1418
769	Coro::State	1419	while (main_top_env->je_prev)
770	_newprocess(args)	1420	main_top_env = main_top_env->je_prev;
771	SV * args	1421
772	PROTOTYPE: $	1422	coroapi.ver = CORO_API_VERSION;
		1423	coroapi.transfer = api_transfer;
		1424
		1425	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1426	}
		1427
		1428	SV *
		1429	new (char *klass, ...)
773	CODE:	1430	CODE:
774	Coro__State coro;	1431	{
		1432	struct coro *coro;
		1433	HV *hv;
		1434	int i;
775		1435
776	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
777	croak ("Coro::State::_newprocess expects an arrayref");
778
779	New (0, coro, 1, struct coro);	1436	Newz (0, coro, 1, struct coro);
		1437	coro->args = newAV ();
		1438	coro->flags = CF_NEW;
780		1439
781	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1440	if (coro_first) coro_first->prev = coro;
782	coro->mainstack = 0; /* actual work is done inside transfer */	1441	coro->next = coro_first;
783	coro->stack = 0;	1442	coro_first = coro;
784		1443
785	RETVAL = coro;	1444	coro->hv = hv = newHV ();
		1445	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
		1446	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1447
		1448	av_extend (coro->args, items - 1);
		1449	for (i = 1; i < items; i++)
		1450	av_push (coro->args, newSVsv (ST (i)));
		1451	}
786	OUTPUT:	1452	OUTPUT:
787	RETVAL	1453	RETVAL
788		1454
		1455	# these not obviously related functions are all rolled into the same xs
		1456	# function to increase chances that they all will call transfer with the same
		1457	# stack offset
789	void	1458	void
790	transfer(prev, next, flags = TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK)	1459	_set_stacklevel (...)
791	Coro::State_or_hashref prev	1460	ALIAS:
792	Coro::State_or_hashref next	1461	Coro::State::transfer = 1
793	int flags	1462	Coro::schedule = 2
794	PROTOTYPE: @	1463	Coro::cede = 3
		1464	Coro::cede_notself = 4
795	CODE:	1465	CODE:
796	transfer (aTHX_ prev, next, flags);	1466	{
		1467	struct transfer_args ta;
		1468
		1469	switch (ix)
		1470	{
		1471	case 0:
		1472	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1473	ta.next = 0;
		1474	break;
		1475
		1476	case 1:
		1477	if (items != 2)
		1478	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1479
		1480	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1481	break;
		1482
		1483	case 2:
		1484	prepare_schedule (aTHX_ &ta);
		1485	break;
		1486
		1487	case 3:
		1488	prepare_cede (aTHX_ &ta);
		1489	break;
		1490
		1491	case 4:
		1492	if (!prepare_cede_notself (aTHX_ &ta))
		1493	XSRETURN_EMPTY;
		1494
		1495	break;
		1496	}
		1497
		1498	BARRIER;
		1499	TRANSFER (ta);
		1500
		1501	if (expect_false (GIMME_V != G_VOID && ta.next != ta.prev))
		1502	XSRETURN_YES;
		1503	}
		1504
		1505	bool
		1506	_destroy (SV *coro_sv)
		1507	CODE:
		1508	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1509	OUTPUT:
		1510	RETVAL
797		1511
798	void	1512	void
799	DESTROY(coro)	1513	_exit (code)
800	Coro::State coro	1514	int code
801	CODE:	1515	PROTOTYPE: $
		1516	CODE:
		1517	_exit (code);
802		1518
803	if (coro->mainstack && coro->mainstack != main_mainstack)	1519	int
		1520	cctx_stacksize (int new_stacksize = 0)
		1521	CODE:
		1522	RETVAL = coro_stacksize;
		1523	if (new_stacksize)
		1524	coro_stacksize = new_stacksize;
		1525	OUTPUT:
		1526	RETVAL
		1527
		1528	int
		1529	cctx_count ()
		1530	CODE:
		1531	RETVAL = cctx_count;
		1532	OUTPUT:
		1533	RETVAL
		1534
		1535	int
		1536	cctx_idle ()
		1537	CODE:
		1538	RETVAL = cctx_idle;
		1539	OUTPUT:
		1540	RETVAL
		1541
		1542	void
		1543	list ()
		1544	PPCODE:
		1545	{
		1546	struct coro *coro;
		1547	for (coro = coro_first; coro; coro = coro->next)
		1548	if (coro->hv)
		1549	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1550	}
		1551
		1552	void
		1553	call (Coro::State coro, SV *coderef)
		1554	ALIAS:
		1555	eval = 1
		1556	CODE:
		1557	{
		1558	if (coro->mainstack)
804	{	1559	{
805	struct coro temp;	1560	struct coro temp;
		1561	Zero (&temp, 1, struct coro);
806		1562
807	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1563	if (!(coro->flags & CF_RUNNING))
808	LOAD(aTHX_ coro);	1564	{
		1565	save_perl (aTHX_ &temp);
		1566	load_perl (aTHX_ coro);
		1567	}
809		1568
810	destroy_stacks (aTHX);	1569	{
		1570	dSP;
		1571	ENTER;
		1572	SAVETMPS;
		1573	PUSHMARK (SP);
		1574	PUTBACK;
		1575	if (ix)
		1576	eval_sv (coderef, 0);
		1577	else
		1578	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1579	SPAGAIN;
		1580	FREETMPS;
		1581	LEAVE;
		1582	PUTBACK;
		1583	}
811		1584
812	LOAD((&temp)); /* this will get rid of defsv etc.. */	1585	if (!(coro->flags & CF_RUNNING))
813		1586	{
814	coro->mainstack = 0;	1587	save_perl (aTHX_ coro);
		1588	load_perl (aTHX_ &temp);
		1589	}
815	}	1590	}
		1591	}
816		1592
817	deallocate_stack (coro);	1593	SV *
818		1594	is_ready (Coro::State coro)
819	Safefree (coro);	1595	PROTOTYPE: $
		1596	ALIAS:
		1597	is_ready = CF_READY
		1598	is_running = CF_RUNNING
		1599	is_new = CF_NEW
		1600	is_destroyed = CF_DESTROYED
		1601	CODE:
		1602	RETVAL = boolSV (coro->flags & ix);
		1603	OUTPUT:
		1604	RETVAL
820		1605
821	void	1606	void
822	flush()	1607	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1608
		1609	SV *
		1610	has_stack (Coro::State coro)
		1611	PROTOTYPE: $
823	CODE:	1612	CODE:
824	#ifdef MAY_FLUSH	1613	RETVAL = boolSV (!!coro->cctx);
825	flush_padlist_cache ();	1614	OUTPUT:
826	#endif	1615	RETVAL
827		1616
		1617	int
		1618	is_traced (Coro::State coro)
		1619	PROTOTYPE: $
		1620	CODE:
		1621	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1622	OUTPUT:
		1623	RETVAL
		1624
		1625	IV
		1626	rss (Coro::State coro)
		1627	PROTOTYPE: $
		1628	ALIAS:
		1629	usecount = 1
		1630	CODE:
		1631	switch (ix)
		1632	{
		1633	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1634	case 1: RETVAL = coro->usecount; break;
		1635	}
		1636	OUTPUT:
		1637	RETVAL
		1638
		1639
828	MODULE = Coro::State PACKAGE = Coro::Cont	1640	MODULE = Coro::State PACKAGE = Coro
829		1641
830	# this is slightly dirty	1642	BOOT:
		1643	{
		1644	int i;
		1645
		1646	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1647	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1648	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1649
		1650	coro_current = get_sv ("Coro::current", FALSE);
		1651	SvREADONLY_on (coro_current);
		1652
		1653	coro_stash = gv_stashpv ("Coro", TRUE);
		1654
		1655	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1656	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1657	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1658	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1659	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1660	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1661
		1662	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1663	coro_ready[i] = newAV ();
		1664
		1665	{
		1666	SV *sv = perl_get_sv("Coro::API", 1);
		1667
		1668	coroapi.schedule = api_schedule;
		1669	coroapi.cede = api_cede;
		1670	coroapi.cede_notself = api_cede_notself;
		1671	coroapi.ready = api_ready;
		1672	coroapi.is_ready = api_is_ready;
		1673	coroapi.nready = &coro_nready;
		1674	coroapi.current = coro_current;
		1675
		1676	GCoroAPI = &coroapi;
		1677	sv_setiv (sv, (IV)&coroapi);
		1678	SvREADONLY_on (sv);
		1679	}
		1680	}
831		1681
832	void	1682	void
833	yield(...)	1683	_set_current (SV *current)
834	PROTOTYPE: @	1684	PROTOTYPE: $
		1685	CODE:
		1686	SvREFCNT_dec (SvRV (coro_current));
		1687	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1688
		1689	int
		1690	prio (Coro::State coro, int newprio = 0)
		1691	ALIAS:
		1692	nice = 1
835	CODE:	1693	CODE:
836	static SV *returnstk;	1694	{
837	SV *sv;	1695	RETVAL = coro->prio;
		1696
		1697	if (items > 1)
		1698	{
		1699	if (ix)
		1700	newprio = coro->prio - newprio;
		1701
		1702	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1703	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1704
		1705	coro->prio = newprio;
		1706	}
		1707	}
		1708	OUTPUT:
		1709	RETVAL
		1710
		1711	SV *
		1712	ready (SV *self)
		1713	PROTOTYPE: $
		1714	CODE:
		1715	RETVAL = boolSV (api_ready (self));
		1716	OUTPUT:
		1717	RETVAL
		1718
		1719	int
		1720	nready (...)
		1721	PROTOTYPE:
		1722	CODE:
		1723	RETVAL = coro_nready;
		1724	OUTPUT:
		1725	RETVAL
		1726
		1727	# for async_pool speedup
		1728	void
		1729	_pool_1 (SV *cb)
		1730	CODE:
		1731	{
		1732	struct coro *coro = SvSTATE (coro_current);
		1733	HV *hv = (HV *)SvRV (coro_current);
838	AV *defav = GvAV (PL_defgv);	1734	AV *defav = GvAV (PL_defgv);
839	struct coro *prev, *next;	1735	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1736	AV *invoke_av;
		1737	int i, len;
840		1738
841	if (!returnstk)	1739	if (!invoke)
842	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	1740	croak ("\3terminate\2\n");
843		1741
844	/* set up @_ -- ugly */	1742	SvREFCNT_dec (coro->saved_deffh);
845	av_clear (defav);	1743	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1744
		1745	hv_store (hv, "desc", sizeof ("desc") - 1,
		1746	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1747
		1748	invoke_av = (AV *)SvRV (invoke);
		1749	len = av_len (invoke_av);
		1750
		1751	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1752
		1753	if (len > 0)
		1754	{
846	av_fill (defav, items - 1);	1755	av_fill (defav, len - 1);
847	while (items--)	1756	for (i = 0; i < len; ++i)
848	av_store (defav, items, SvREFCNT_inc (ST(items)));	1757	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1758	}
849		1759
850	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
851	sv = av_pop ((AV *)SvRV (returnstk));
852	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
853	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
854	SvREFCNT_dec (sv);	1760	SvREFCNT_dec (invoke);
		1761	}
855		1762
856	transfer(aTHX_ prev, next, 0);	1763	void
		1764	_pool_2 (SV *cb)
		1765	CODE:
		1766	{
		1767	struct coro *coro = SvSTATE (coro_current);
857		1768
		1769	sv_setsv (cb, &PL_sv_undef);
		1770
		1771	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1772	coro->saved_deffh = 0;
		1773
		1774	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1775	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1776	croak ("\3terminate\2\n");
		1777
		1778	av_clear (GvAV (PL_defgv));
		1779	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1780	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1781
		1782	coro->prio = 0;
		1783
		1784	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1785	api_trace (coro_current, 0);
		1786
		1787	av_push (av_async_pool, newSVsv (coro_current));
		1788	}
		1789
		1790
		1791	MODULE = Coro::State PACKAGE = Coro::AIO
		1792
		1793	SV *
		1794	_get_state ()
		1795	CODE:
		1796	{
		1797	struct io_state *data;
		1798
		1799	RETVAL = newSV (sizeof (struct io_state));
		1800	data = (struct io_state *)SvPVX (RETVAL);
		1801	SvCUR_set (RETVAL, sizeof (struct io_state));
		1802	SvPOK_only (RETVAL);
		1803
		1804	data->errorno = errno;
		1805	data->laststype = PL_laststype;
		1806	data->laststatval = PL_laststatval;
		1807	data->statcache = PL_statcache;
		1808	}
		1809	OUTPUT:
		1810	RETVAL
		1811
		1812	void
		1813	_set_state (char *data_)
		1814	PROTOTYPE: $
		1815	CODE:
		1816	{
		1817	struct io_state *data = (void *)data_;
		1818
		1819	errno = data->errorno;
		1820	PL_laststype = data->laststype;
		1821	PL_laststatval = data->laststatval;
		1822	PL_statcache = data->statcache;
		1823	}
		1824

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