[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.13 by root, Mon Jul 23 22:09:39 2001 UTC vs.
Revision 1.210 by root, Wed Oct 10 03:24:40 2007 UTC

…		…
		1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
		5
1	#include "EXTERN.h"	6	#include "EXTERN.h"
2	#include "perl.h"	7	#include "perl.h"
3	#include "XSUB.h"	8	#include "XSUB.h"
4		9
5	#include "libcoro/coro.c"	10	#include "patchlevel.h"
		11
		12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
		15	#include <inttypes.h> /* portable stdint.h */
6		16
7	#ifdef HAVE_MMAP	17	#ifdef HAVE_MMAP
8	# include <unistd.h>	18	# include <unistd.h>
9	# include <sys/mman.h>	19	# include <sys/mman.h>
		20	# ifndef MAP_ANONYMOUS
		21	# ifdef MAP_ANON
		22	# define MAP_ANONYMOUS MAP_ANON
		23	# else
		24	# undef HAVE_MMAP
		25	# endif
10	#endif	26	# endif
		27	# include <limits.h>
		28	# ifndef PAGESIZE
		29	# define PAGESIZE pagesize
		30	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		31	static long pagesize;
		32	# else
		33	# define BOOT_PAGESIZE (void)0
		34	# endif
		35	#else
		36	# define PAGESIZE 0
		37	# define BOOT_PAGESIZE (void)0
		38	#endif
11		39
12	#define MAY_FLUSH /* increases codesize */	40	#if CORO_USE_VALGRIND
		41	# include <valgrind/valgrind.h>
		42	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		43	#else
		44	# define REGISTER_STACK(cctx,start,end)
		45	#endif
13		46
14	#define SUB_INIT "Coro::State::initialize"	47	/* the maximum number of idle cctx that will be pooled */
		48	#define MAX_IDLE_CCTX 8
15		49
16	#define TRANSFER_SAVE_DEFAV 0x00000001	50	#define PERL_VERSION_ATLEAST(a,b,c) \
17	#define TRANSFER_SAVE_DEFSV 0x00000002	51	(PERL_REVISION > (a) \
18	#define TRANSFER_SAVE_ERRSV 0x00000004	52	\|\| (PERL_REVISION == (a) \
19	#define TRANSFER_SAVE_CCTXT 0x00000008	53	&& (PERL_VERSION > (b) \
		54	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
20		55
21	#define TRANSFER_SAVE_ALL -1	56	#if !PERL_VERSION_ATLEAST (5,6,0)
		57	# ifndef PL_ppaddr
		58	# define PL_ppaddr ppaddr
		59	# endif
		60	# ifndef call_sv
		61	# define call_sv perl_call_sv
		62	# endif
		63	# ifndef get_sv
		64	# define get_sv perl_get_sv
		65	# endif
		66	# ifndef get_cv
		67	# define get_cv perl_get_cv
		68	# endif
		69	# ifndef IS_PADGV
		70	# define IS_PADGV(v) 0
		71	# endif
		72	# ifndef IS_PADCONST
		73	# define IS_PADCONST(v) 0
		74	# endif
		75	#endif
22		76
		77	/* 5.8.7 */
		78	#ifndef SvRV_set
		79	# define SvRV_set(s,v) SvRV(s) = (v)
		80	#endif
		81
		82	/* 5.8.8 */
		83	#ifndef GV_NOTQUAL
		84	# define GV_NOTQUAL 0
		85	#endif
		86	#ifndef newSV
		87	# define newSV(l) NEWSV(0,l)
		88	#endif
		89
		90	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		91	# undef CORO_STACKGUARD
		92	#endif
		93
		94	#ifndef CORO_STACKGUARD
		95	# define CORO_STACKGUARD 0
		96	#endif
		97
		98	/* prefer perl internal functions over our own? */
		99	#ifndef CORO_PREFER_PERL_FUNCTIONS
		100	# define CORO_PREFER_PERL_FUNCTIONS 0
		101	#endif
		102
		103	/* The next macros try to return the current stack pointer, in an as
		104	* portable way as possible. */
		105	#define dSTACKLEVEL volatile char stacklevel
		106	#define STACKLEVEL ((void *)&stacklevel)
		107
		108	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		109
		110	#if __GNUC__ >= 3
		111	# define attribute(x) __attribute__(x)
		112	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		113	# define expect(expr,value) __builtin_expect ((expr),(value))
		114	#else
		115	# define attribute(x)
		116	# define BARRIER
		117	# define expect(expr,value) (expr)
		118	#endif
		119
		120	#define expect_false(expr) expect ((expr) != 0, 0)
		121	#define expect_true(expr) expect ((expr) != 0, 1)
		122
		123	#define NOINLINE attribute ((noinline))
		124
		125	#include "CoroAPI.h"
		126
		127	#ifdef USE_ITHREADS
		128	static perl_mutex coro_mutex;
		129	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		130	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		131	#else
		132	# define LOCK (void)0
		133	# define UNLOCK (void)0
		134	#endif
		135
		136	#define strpair(const) const, sizeof (const) - 1
		137
		138	/* helper storage struct for Coro::AIO */
		139	struct io_state
		140	{
		141	int errorno;
		142	I32 laststype;
		143	int laststatval;
		144	Stat_t statcache;
		145	};
		146
		147	static size_t coro_stacksize = CORO_STACKSIZE;
		148	static struct CoroAPI coroapi;
		149	static AV main_mainstack; / used to differentiate between $main and others */
		150	static JMPENV *main_top_env;
		151	static HV coro_state_stash, coro_stash;
		152	static SV coro_mortal; / will be freed after next transfer */
		153
		154	static GV irsgv; / $/ */
		155	static GV stdoutgv; / STDOUT /
		156
		157	static HV hv_sig; / %SIG */
		158	static SV *sv_diehook;
		159	static SV *sv_warnhook;
		160
		161	/* async_pool helper stuff */
		162	static SV *sv_pool_rss;
		163	static SV *sv_pool_size;
		164	static AV *av_async_pool;
		165
		166	static struct coro_cctx cctx_first[3]; / index by GIMME_V type, void, scalar, array */
		167	static int cctx_count, cctx_idle[3];
		168
		169	enum {
		170	CC_MAPPED = 0x01,
		171	CC_NOREUSE = 0x02, /* throw this away after tracing */
		172	CC_TRACE = 0x04,
		173	CC_TRACE_SUB = 0x08, /* trace sub calls */
		174	CC_TRACE_LINE = 0x10, /* trace each statement */
		175	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		176	};
		177
		178	/* this is a structure representing a c-level coroutine */
		179	typedef struct coro_cctx {
		180	struct coro_cctx *next;
		181
		182	/* the stack */
		183	void *sptr;
		184	size_t ssize;
		185
		186	/* cpu state */
		187	void idle_sp; / sp of top-level transfer/schedule/cede call */
		188	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		189	JMPENV *top_env;
		190	coro_context cctx;
		191
		192	#if CORO_USE_VALGRIND
		193	int valgrind_id;
		194	#endif
		195	unsigned char flags;
		196	} coro_cctx;
		197
		198	enum {
		199	CF_RUNNING = 0x0001, /* coroutine is running */
		200	CF_READY = 0x0002, /* coroutine is ready */
		201	CF_NEW = 0x0004, /* has never been switched to */
		202	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		203	};
		204
		205	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		206	typedef struct {
		207	SV *defsv;
		208	AV *defav;
		209	SV *errsv;
		210	SV *irsgv;
		211	#define VAR(name,type) type name;
		212	# include "state.h"
		213	#undef VAR
		214	} perl_slots;
		215
		216	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		217
		218	/* this is a structure representing a perl-level coroutine */
23	struct coro {	219	struct coro {
24	/* the optional C context */	220	/* the c coroutine allocated to this perl coroutine, if any */
25	coro_context cctx;	221	coro_cctx *cctx;
26	void *sptr;	222	int gimme;
27	long ssize;
28		223
29	/* optionally saved, might be zero */	224	/* process data */
30	AV *defav;
31	SV *defsv;
32	SV *errsv;
33
34	/* saved global state not related to stacks */
35	U8 dowarn;
36
37	/* the stacks and related info (callchain etc..) */
38	PERL_SI *curstackinfo;
39	AV *curstack;
40	AV *mainstack;	225	AV *mainstack;
41	SV **stack_sp;	226	perl_slots slot; / basically the saved sp */
42	OP *op;
43	SV **curpad;
44	SV **stack_base;
45	SV **stack_max;
46	SV **tmps_stack;
47	I32 tmps_floor;
48	I32 tmps_ix;
49	I32 tmps_max;
50	I32 *markstack;
51	I32 *markstack_ptr;
52	I32 *markstack_max;
53	I32 *scopestack;
54	I32 scopestack_ix;
55	I32 scopestack_max;
56	ANY *savestack;
57	I32 savestack_ix;
58	I32 savestack_max;
59	OP **retstack;
60	I32 retstack_ix;
61	I32 retstack_max;
62	COP *curcop;
63	JMPENV start_env;
64	JMPENV *top_env;
65		227
66	/* data associated with this coroutine (initial args) */	228	AV args; / data associated with this coroutine (initial args) */
67	AV *args;	229	int refcnt; /* coroutines are refcounted, yes */
		230	int flags; /* CF_ flags */
		231	HV hv; / the perl hash associated with this coro, if any */
		232
		233	/* statistics */
		234	int usecount; /* number of transfers to this coro */
		235
		236	/* coro process data */
		237	int prio;
		238	SV throw; / exception to be thrown */
		239
		240	/* async_pool */
		241	SV *saved_deffh;
		242
		243	/* linked list */
		244	struct coro next, prev;
68	};	245	};
69		246
70	typedef struct coro *Coro__State;	247	typedef struct coro *Coro__State;
71	typedef struct coro *Coro__State_or_hashref;	248	typedef struct coro *Coro__State_or_hashref;
72		249
73	static AV main_mainstack; / used to differentiate between $main and others */	250	/ Coro ******************************************************************/
74	static HV *coro_state_stash;
75	static HV *padlist_cache;
76		251
77	/* mostly copied from op.c:cv_clone2 */	252	#define PRIO_MAX 3
78	STATIC AV *	253	#define PRIO_HIGH 1
79	clone_padlist (AV *protopadlist)	254	#define PRIO_NORMAL 0
		255	#define PRIO_LOW -1
		256	#define PRIO_IDLE -3
		257	#define PRIO_MIN -4
		258
		259	/* for Coro.pm */
		260	static SV *coro_current;
		261	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		262	static int coro_nready;
		263	static struct coro *coro_first;
		264
		265	/ lowlevel stuff ********************************************************/
		266
		267	static SV *
		268	coro_get_sv (const char *name, int create)
80	{	269	{
81	AV *av;	270	#if PERL_VERSION_ATLEAST (5,9,0)
82	I32 ix;	271	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
83	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);	272	get_sv (name, create);
84	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);	273	#endif
85	SV **pname = AvARRAY (protopad_name);	274	return get_sv (name, create);
86	SV **ppad = AvARRAY (protopad);	275	}
87	I32 fname = AvFILLp (protopad_name);	276
88	I32 fpad = AvFILLp (protopad);	277	static AV *
		278	coro_get_av (const char *name, int create)
		279	{
		280	#if PERL_VERSION_ATLEAST (5,9,0)
		281	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		282	get_av (name, create);
		283	#endif
		284	return get_av (name, create);
		285	}
		286
		287	static HV *
		288	coro_get_hv (const char *name, int create)
		289	{
		290	#if PERL_VERSION_ATLEAST (5,9,0)
		291	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		292	get_hv (name, create);
		293	#endif
		294	return get_hv (name, create);
		295	}
		296
		297	static AV *
		298	coro_clone_padlist (pTHX_ CV *cv)
		299	{
		300	AV *padlist = CvPADLIST (cv);
89	AV newpadlist, newpad_name, *newpad;	301	AV newpadlist, newpad;
90	SV **npad;
91
92	newpad_name = newAV ();
93	for (ix = fname; ix >= 0; ix--)
94	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
95
96	newpad = newAV ();
97	av_fill (newpad, AvFILLp (protopad));
98	npad = AvARRAY (newpad);
99		302
100	newpadlist = newAV ();	303	newpadlist = newAV ();
101	AvREAL_off (newpadlist);	304	AvREAL_off (newpadlist);
102	av_store (newpadlist, 0, (SV *) newpad_name);	305	#if PERL_VERSION_ATLEAST (5,9,0)
		306	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		307	#else
		308	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		309	#endif
		310	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		311	--AvFILLp (padlist);
		312
		313	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
103	av_store (newpadlist, 1, (SV *) newpad);	314	av_store (newpadlist, 1, (SV *)newpad);
104		315
105	av = newAV (); /* will be @_ */	316	return newpadlist;
106	av_extend (av, 0);	317	}
107	av_store (newpad, 0, (SV *) av);
108	AvFLAGS (av) = AVf_REIFY;
109		318
110	for (ix = fpad; ix > 0; ix--)	319	static void
		320	free_padlist (pTHX_ AV *padlist)
		321	{
		322	/* may be during global destruction */
		323	if (SvREFCNT (padlist))
111	{	324	{
112	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	325	I32 i = AvFILLp (padlist);
113	if (namesv && namesv != &PL_sv_undef)	326	while (i >= 0)
114	{	327	{
115	char name = SvPVX (namesv); / XXX */	328	SV **svp = av_fetch (padlist, i--, FALSE);
116	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')	329	if (svp)
117	{ /* lexical from outside? */
118	npad[ix] = SvREFCNT_inc (ppad[ix]);
119	}	330	{
120	else
121	{ /* our own lexical */
122	SV *sv;	331	SV *sv;
123	if (*name == '&')	332	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
124	sv = SvREFCNT_inc (ppad[ix]);	333	SvREFCNT_dec (sv);
125	else if (*name == '@')	334
126	sv = (SV *) newAV ();	335	SvREFCNT_dec (*svp);
127	else if (*name == '%')
128	sv = (SV *) newHV ();
129	else
130	sv = NEWSV (0, 0);
131	if (!SvPADBUSY (sv))
132	SvPADMY_on (sv);
133	npad[ix] = sv;
134	}	336	}
135	}	337	}
136	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
137	{
138	npad[ix] = SvREFCNT_inc (ppad[ix]);
139	}
140	else
141	{
142	SV *sv = NEWSV (0, 0);
143	SvPADTMP_on (sv);
144	npad[ix] = sv;
145	}
146	}
147		338
148	#if 0 /* return -ENOTUNDERSTOOD */
149	/* Now that vars are all in place, clone nested closures. */
150
151	for (ix = fpad; ix > 0; ix--) {
152	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
153	if (namesv
154	&& namesv != &PL_sv_undef
155	&& !(SvFLAGS(namesv) & SVf_FAKE)
156	&& *SvPVX(namesv) == '&'
157	&& CvCLONE(ppad[ix]))
158	{
159	CV kid = cv_clone((CV)ppad[ix]);
160	SvREFCNT_dec(ppad[ix]);
161	CvCLONE_on(kid);
162	SvPADMY_on(kid);
163	npad[ix] = (SV*)kid;
164	}
165	}
166	#endif
167
168	return newpadlist;
169	}
170
171	#ifdef MAY_FLUSH
172	STATIC AV *
173	free_padlist (AV *padlist)
174	{
175	/* may be during global destruction */
176	if (SvREFCNT(padlist))
177	{
178	I32 i = AvFILLp(padlist);
179	while (i >= 0)
180	{
181	SV **svp = av_fetch(padlist, i--, FALSE);
182	SV sv = svp ? svp : Nullsv;
183	if (sv)
184	SvREFCNT_dec(sv);
185	}
186
187	SvREFCNT_dec((SV*)padlist);	339	SvREFCNT_dec ((SV*)padlist);
188	}	340	}
189	}	341	}
190	#endif	342
		343	static int
		344	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		345	{
		346	AV *padlist;
		347	AV av = (AV )mg->mg_obj;
		348
		349	/* casting is fun. */
		350	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		351	free_padlist (aTHX_ padlist);
		352
		353	SvREFCNT_dec (av);
		354
		355	return 0;
		356	}
		357
		358	#define PERL_MAGIC_coro PERL_MAGIC_ext
		359
		360	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		361
		362	#define CORO_MAGIC(cv) \
		363	SvMAGIC (cv) \
		364	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		365	? SvMAGIC (cv) \
		366	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		367	: 0
		368
		369	static struct coro *
		370	SvSTATE_ (pTHX_ SV *coro)
		371	{
		372	HV *stash;
		373	MAGIC *mg;
		374
		375	if (SvROK (coro))
		376	coro = SvRV (coro);
		377
		378	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		379	croak ("Coro::State object required");
		380
		381	stash = SvSTASH (coro);
		382	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		383	{
		384	/* very slow, but rare, check */
		385	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		386	croak ("Coro::State object required");
		387	}
		388
		389	mg = CORO_MAGIC (coro);
		390	return (struct coro *)mg->mg_ptr;
		391	}
		392
		393	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
191		394
192	/* the next two functions merely cache the padlists */	395	/* the next two functions merely cache the padlists */
193	STATIC void	396	static void
194	get_padlist (CV *cv)	397	get_padlist (pTHX_ CV *cv)
195	{	398	{
196	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);	399	MAGIC *mg = CORO_MAGIC (cv);
		400	AV *av;
197		401
198	if (he && AvFILLp ((AV )he) >= 0)	402	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
199	CvPADLIST (cv) = (AV )av_pop ((AV )*he);	403	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
200	else	404	else
201	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
202	}
203
204	STATIC void
205	put_padlist (CV *cv)
206	{
207	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);
208
209	if (SvTYPE (*he) != SVt_PVAV)
210	{	405	{
		406	#if CORO_PREFER_PERL_FUNCTIONS
		407	/* this is probably cleaner, but also slower? */
		408	CV *cp = Perl_cv_clone (cv);
		409	CvPADLIST (cv) = CvPADLIST (cp);
		410	CvPADLIST (cp) = 0;
211	SvREFCNT_dec (*he);	411	SvREFCNT_dec (cp);
212	he = (SV )newAV ();	412	#else
		413	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		414	#endif
213	}	415	}
214
215	av_push ((AV )he, (SV *)CvPADLIST (cv));
216	}	416	}
217		417
218	#ifdef MAY_FLUSH	418	static void
219	STATIC void	419	put_padlist (pTHX_ CV *cv)
220	flush_padlist_cache ()
221	{	420	{
222	HV *hv = padlist_cache;	421	MAGIC *mg = CORO_MAGIC (cv);
223	padlist_cache = newHV ();	422	AV *av;
224		423
225	if (hv_iterinit (hv))	424	if (expect_false (!mg))
226	{
227	HE *he;
228	AV *padlist;
229
230	while (!!(he = hv_iternext (hv)))
231	{
232	AV av = (AV )HeVAL(he);
233
234	/* casting is fun. */
235	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
236	free_padlist (padlist);
237	}
238	}	425	{
		426	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		427	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		428	mg->mg_virtual = &vtbl_coro;
		429	mg->mg_obj = (SV *)newAV ();
		430	}
239		431
240	SvREFCNT_dec (hv);	432	av = (AV *)mg->mg_obj;
241	}
242	#endif
243		433
244	#define SB do {	434	if (expect_false (AvFILLp (av) >= AvMAX (av)))
245	#define SE } while (0)	435	av_extend (av, AvMAX (av) + 1);
246		436
247	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE	437	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
248	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE	438	}
249		439
250	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	440	/ load & save, init *****************************************************/
251		441
252	static void	442	static void
253	load_state(pTHX_ Coro__State c)	443	load_perl (pTHX_ Coro__State c)
254	{	444	{
255	PL_dowarn = c->dowarn;	445	perl_slots *slot = c->slot;
		446	c->slot = 0;
256		447
257	PL_curstackinfo = c->curstackinfo;
258	PL_curstack = c->curstack;
259	PL_mainstack = c->mainstack;	448	PL_mainstack = c->mainstack;
260	PL_stack_sp = c->stack_sp;
261	PL_op = c->op;
262	PL_curpad = c->curpad;
263	PL_stack_base = c->stack_base;
264	PL_stack_max = c->stack_max;
265	PL_tmps_stack = c->tmps_stack;
266	PL_tmps_floor = c->tmps_floor;
267	PL_tmps_ix = c->tmps_ix;
268	PL_tmps_max = c->tmps_max;
269	PL_markstack = c->markstack;
270	PL_markstack_ptr = c->markstack_ptr;
271	PL_markstack_max = c->markstack_max;
272	PL_scopestack = c->scopestack;
273	PL_scopestack_ix = c->scopestack_ix;
274	PL_scopestack_max = c->scopestack_max;
275	PL_savestack = c->savestack;
276	PL_savestack_ix = c->savestack_ix;
277	PL_savestack_max = c->savestack_max;
278	PL_retstack = c->retstack;
279	PL_retstack_ix = c->retstack_ix;
280	PL_retstack_max = c->retstack_max;
281	PL_curcop = c->curcop;
282	PL_start_env = c->start_env;
283	PL_top_env = c->top_env;
284		449
285	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	450	GvSV (PL_defgv) = slot->defsv;
286	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	451	GvAV (PL_defgv) = slot->defav;
287	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	452	GvSV (PL_errgv) = slot->errsv;
		453	GvSV (irsgv) = slot->irsgv;
		454
		455	#define VAR(name,type) PL_ ## name = slot->name;
		456	# include "state.h"
		457	#undef VAR
		458
		459	/hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);/
		460	/hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);/
288		461
289	{	462	{
290	dSP;	463	dSP;
		464
291	CV *cv;	465	CV *cv;
292		466
293	/* now do the ugly restore mess */	467	/* now do the ugly restore mess */
294	while ((cv = (CV *)POPs))	468	while (expect_true (cv = (CV *)POPs))
295	{	469	{
296	AV padlist = (AV )POPs;
297
298	if (padlist)
299	{
300	put_padlist (cv); /* mark this padlist as available */	470	put_padlist (aTHX_ cv); /* mark this padlist as available */
301	CvPADLIST(cv) = padlist;	471	CvDEPTH (cv) = PTR2IV (POPs);
302	#ifdef USE_THREADS	472	CvPADLIST (cv) = (AV *)POPs;
303	/CvOWNER(cv) = (struct perl_thread )POPs;*/
304	#endif
305	}
306
307	++CvDEPTH(cv);
308	}	473	}
309		474
310	PUTBACK;	475	PUTBACK;
311	}	476	}
312	}	477	}
313		478
314	static void	479	static void
315	save_state(pTHX_ Coro__State c, int flags)	480	save_perl (pTHX_ Coro__State c)
316	{	481	{
317	{	482	{
318	dSP;	483	dSP;
319	I32 cxix = cxstack_ix;	484	I32 cxix = cxstack_ix;
320	PERL_CONTEXT *ccstk = cxstack;	485	PERL_CONTEXT *ccstk = cxstack;
323	/*	488	/*
324	* the worst thing you can imagine happens first - we have to save	489	* the worst thing you can imagine happens first - we have to save
325	* (and reinitialize) all cv's in the whole callchain :(	490	* (and reinitialize) all cv's in the whole callchain :(
326	*/	491	*/
327		492
328	PUSHs (Nullsv);	493	XPUSHs (Nullsv);
329	/* this loop was inspired by pp_caller */	494	/* this loop was inspired by pp_caller */
330	for (;;)	495	for (;;)
331	{	496	{
332	do	497	while (expect_true (cxix >= 0))
333	{	498	{
334	PERL_CONTEXT *cx = &ccstk[cxix--];	499	PERL_CONTEXT *cx = &ccstk[cxix--];
335		500
336	if (CxTYPE(cx) == CXt_SUB)	501	if (expect_true (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT))
337	{	502	{
338	CV *cv = cx->blk_sub.cv;	503	CV *cv = cx->blk_sub.cv;
		504
339	if (CvDEPTH(cv))	505	if (expect_true (CvDEPTH (cv)))
340	{	506	{
341	#ifdef USE_THREADS
342	/XPUSHs ((SV )CvOWNER(cv));*/
343	/CvOWNER(cv) = 0;/
344	/error must unlock this cv etc.. etc.../
345	#endif
346	EXTEND (SP, CvDEPTH(cv)*2);	507	EXTEND (SP, 3);
347
348	while (--CvDEPTH(cv))
349	{
350	/* this tells the restore code to increment CvDEPTH */
351	PUSHs (Nullsv);
352	PUSHs ((SV *)cv);
353	}
354
355	PUSHs ((SV *)CvPADLIST(cv));	508	PUSHs ((SV *)CvPADLIST (cv));
		509	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
356	PUSHs ((SV *)cv);	510	PUSHs ((SV *)cv);
357		511
358	get_padlist (cv); /* this is a monster */	512	CvDEPTH (cv) = 0;
		513	get_padlist (aTHX_ cv);
359	}	514	}
360	}	515	}
361	else if (CxTYPE(cx) == CXt_FORMAT)
362	{
363	/* I never used formats, so how should I know how these are implemented? */
364	/* my bold guess is as a simple, plain sub... */
365	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
366	}
367	}	516	}
368	while (cxix >= 0);
369		517
370	if (top_si->si_type == PERLSI_MAIN)	518	if (expect_true (top_si->si_type == PERLSI_MAIN))
371	break;	519	break;
372		520
373	top_si = top_si->si_prev;	521	top_si = top_si->si_prev;
374	ccstk = top_si->si_cxstack;	522	ccstk = top_si->si_cxstack;
375	cxix = top_si->si_cxix;	523	cxix = top_si->si_cxix;
376	}	524	}
377		525
378	PUTBACK;	526	PUTBACK;
379	}	527	}
380		528
381	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	529	/* allocate some space on the context stack for our purposes */
382	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	530	/* we manually unroll here, as usually 2 slots is enough */
383	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	531	if (SLOT_COUNT >= 1) CXINC;
		532	if (SLOT_COUNT >= 2) CXINC;
		533	if (SLOT_COUNT >= 3) CXINC;
		534	{
		535	int i;
		536	for (i = 3; i < SLOT_COUNT; ++i)
		537	CXINC;
		538	}
		539	cxstack_ix -= SLOT_COUNT; /* undo allocation */
384		540
385	/* I have not the slightest idea of why av_reify is necessary */
386	/* but if it's missing the defav contents magically get replaced sometimes */
387	if (c->defav)
388	av_reify (c->defav);
389
390	c->dowarn = PL_dowarn;
391
392	c->curstackinfo = PL_curstackinfo;
393	c->curstack = PL_curstack;
394	c->mainstack = PL_mainstack;	541	c->mainstack = PL_mainstack;
395	c->stack_sp = PL_stack_sp;	542
396	c->op = PL_op;	543	{
397	c->curpad = PL_curpad;	544	perl_slots slot = c->slot = (perl_slots )(cxstack + cxstack_ix + 1);
398	c->stack_base = PL_stack_base;	545
399	c->stack_max = PL_stack_max;	546	slot->defav = GvAV (PL_defgv);
400	c->tmps_stack = PL_tmps_stack;	547	slot->defsv = DEFSV;
401	c->tmps_floor = PL_tmps_floor;	548	slot->errsv = ERRSV;
402	c->tmps_ix = PL_tmps_ix;	549	slot->irsgv = GvSV (irsgv);
403	c->tmps_max = PL_tmps_max;	550
404	c->markstack = PL_markstack;	551	#define VAR(name,type) slot->name = PL_ ## name;
405	c->markstack_ptr = PL_markstack_ptr;	552	# include "state.h"
406	c->markstack_max = PL_markstack_max;	553	#undef VAR
407	c->scopestack = PL_scopestack;	554	}
408	c->scopestack_ix = PL_scopestack_ix;
409	c->scopestack_max = PL_scopestack_max;
410	c->savestack = PL_savestack;
411	c->savestack_ix = PL_savestack_ix;
412	c->savestack_max = PL_savestack_max;
413	c->retstack = PL_retstack;
414	c->retstack_ix = PL_retstack_ix;
415	c->retstack_max = PL_retstack_max;
416	c->curcop = PL_curcop;
417	c->start_env = PL_start_env;
418	c->top_env = PL_top_env;
419	}	555	}
420		556
421	/*	557	/*
422	* allocate various perl stacks. This is an exact copy	558	* allocate various perl stacks. This is an exact copy
423	* of perl.c:init_stacks, except that it uses less memory	559	* of perl.c:init_stacks, except that it uses less memory
424	* on the assumption that coroutines do not usually need	560	* on the (sometimes correct) assumption that coroutines do
425	* a lot of stackspace.	561	* not usually need a lot of stackspace.
426	*/	562	*/
427	STATIC void	563	#if CORO_PREFER_PERL_FUNCTIONS
		564	# define coro_init_stacks init_stacks
		565	#else
		566	static void
428	coro_init_stacks (pTHX)	567	coro_init_stacks (pTHX)
429	{	568	{
430	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	569	PL_curstackinfo = new_stackinfo(32, 8);
431	PL_curstackinfo->si_type = PERLSI_MAIN;	570	PL_curstackinfo->si_type = PERLSI_MAIN;
432	PL_curstack = PL_curstackinfo->si_stack;	571	PL_curstack = PL_curstackinfo->si_stack;
433	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	572	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
434		573
435	PL_stack_base = AvARRAY(PL_curstack);	574	PL_stack_base = AvARRAY(PL_curstack);
436	PL_stack_sp = PL_stack_base;	575	PL_stack_sp = PL_stack_base;
437	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	576	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
438		577
439	New(50,PL_tmps_stack,64,SV*);	578	New(50,PL_tmps_stack,32,SV*);
440	PL_tmps_floor = -1;	579	PL_tmps_floor = -1;
441	PL_tmps_ix = -1;	580	PL_tmps_ix = -1;
442	PL_tmps_max = 64;	581	PL_tmps_max = 32;
443		582
444	New(54,PL_markstack,12,I32);	583	New(54,PL_markstack,16,I32);
445	PL_markstack_ptr = PL_markstack;	584	PL_markstack_ptr = PL_markstack;
446	PL_markstack_max = PL_markstack + 12;	585	PL_markstack_max = PL_markstack + 16;
447		586
		587	#ifdef SET_MARK_OFFSET
448	SET_MARK_OFFSET;	588	SET_MARK_OFFSET;
		589	#endif
449		590
450	New(54,PL_scopestack,12,I32);	591	New(54,PL_scopestack,8,I32);
451	PL_scopestack_ix = 0;	592	PL_scopestack_ix = 0;
452	PL_scopestack_max = 12;	593	PL_scopestack_max = 8;
453		594
454	New(54,PL_savestack,64,ANY);	595	New(54,PL_savestack,24,ANY);
455	PL_savestack_ix = 0;	596	PL_savestack_ix = 0;
456	PL_savestack_max = 64;	597	PL_savestack_max = 24;
457		598
		599	#if !PERL_VERSION_ATLEAST (5,9,0)
458	New(54,PL_retstack,8,OP*);	600	New(54,PL_retstack,4,OP*);
459	PL_retstack_ix = 0;	601	PL_retstack_ix = 0;
460	PL_retstack_max = 8;	602	PL_retstack_max = 4;
		603	#endif
461	}	604	}
		605	#endif
462		606
463	/*	607	/*
464	* destroy the stacks, the callchain etc...	608	* destroy the stacks, the callchain etc...
465	* still there is a memleak of 128 bytes...
466	*/	609	*/
467	STATIC void	610	static void
468	destroy_stacks(pTHX)	611	coro_destroy_stacks (pTHX)
469	{	612	{
470	/* is this ugly, I ask? */
471	while (PL_scopestack_ix)
472	LEAVE;
473
474	/* sure it is, but more important: is it correct?? :/ */
475	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
476	FREETMPS;
477
478	while (PL_curstackinfo->si_next)	613	while (PL_curstackinfo->si_next)
479	PL_curstackinfo = PL_curstackinfo->si_next;	614	PL_curstackinfo = PL_curstackinfo->si_next;
480		615
481	while (PL_curstackinfo)	616	while (PL_curstackinfo)
482	{	617	{
483	PERL_SI *p = PL_curstackinfo->si_prev;	618	PERL_SI *p = PL_curstackinfo->si_prev;
484		619
485	{	620	if (!IN_DESTRUCT)
486	dSP;
487	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
488	PUTBACK; /* possibly superfluous */
489	}
490
491	dounwind(-1);
492
493	SvREFCNT_dec(PL_curstackinfo->si_stack);	621	SvREFCNT_dec (PL_curstackinfo->si_stack);
		622
494	Safefree(PL_curstackinfo->si_cxstack);	623	Safefree (PL_curstackinfo->si_cxstack);
495	Safefree(PL_curstackinfo);	624	Safefree (PL_curstackinfo);
496	PL_curstackinfo = p;	625	PL_curstackinfo = p;
497	}	626	}
498		627
499	Safefree(PL_tmps_stack);	628	Safefree (PL_tmps_stack);
500	Safefree(PL_markstack);	629	Safefree (PL_markstack);
501	Safefree(PL_scopestack);	630	Safefree (PL_scopestack);
502	Safefree(PL_savestack);	631	Safefree (PL_savestack);
		632	#if !PERL_VERSION_ATLEAST (5,9,0)
503	Safefree(PL_retstack);	633	Safefree (PL_retstack);
504	}
505
506	static void
507	allocate_stack (Coro__State ctx)
508	{
509	#ifdef HAVE_MMAP
510	ctx->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-use */
511	ctx->sptr = mmap (0, ctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);
512	if (ctx->sptr == (void *)-1)
513	#endif	634	#endif
514	{	635	}
515	/FIXME//D//* reasonable stack size! */	636
516	ctx->ssize = 4096 * sizeof (long);	637	static size_t
517	New (0, ctx->sptr, 4096, long);	638	coro_rss (pTHX_ struct coro *coro)
		639	{
		640	size_t rss = sizeof (*coro);
		641
		642	if (coro->mainstack)
518	}	643	{
519	}	644	perl_slots tmp_slot;
		645	perl_slots *slot;
520		646
521	static void	647	if (coro->flags & CF_RUNNING)
522	deallocate_stack (Coro__State ctx)	648	{
523	{	649	slot = &tmp_slot;
524	#ifdef HAVE_MMAP
525	munmap (ctx->sptr, ctx->ssize);
526	#else
527	Safefree (ctx->sptr);
528	#endif
529	}
530		650
531	/* might go away together with optional SAVE_CCTXT */	651	#define VAR(name,type) slot->name = PL_ ## name;
		652	# include "state.h"
		653	#undef VAR
		654	}
		655	else
		656	slot = coro->slot;
		657
		658	rss += sizeof (slot->curstackinfo);
		659	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		660	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		661	rss += slot->tmps_max * sizeof (SV *);
		662	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		663	rss += slot->scopestack_max * sizeof (I32);
		664	rss += slot->savestack_max * sizeof (ANY);
		665
		666	#if !PERL_VERSION_ATLEAST (5,9,0)
		667	rss += slot->retstack_max * sizeof (OP *);
		668	#endif
		669	}
		670
		671	return rss;
		672	}
		673
		674	/ coroutine stack handling **********************************************/
		675
532	static void	676	static void
533	setup_coro (void *arg)	677	coro_setup (pTHX_ struct coro *coro)
534	{	678	{
535	/*	679	/*
536	* emulate part of the perl startup here.	680	* emulate part of the perl startup here.
537	*/	681	*/
		682	coro_init_stacks (aTHX);
		683
		684	PL_runops = RUNOPS_DEFAULT;
		685	PL_curcop = &PL_compiling;
		686	PL_in_eval = EVAL_NULL;
		687	PL_comppad = 0;
		688	PL_curpm = 0;
		689	PL_curpad = 0;
		690	PL_localizing = 0;
		691	PL_dirty = 0;
		692	PL_restartop = 0;
		693	PL_diehook = 0; hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		694	PL_warnhook = 0; hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		695
		696	GvSV (PL_defgv) = newSV (0);
		697	GvAV (PL_defgv) = coro->args; coro->args = 0;
		698	GvSV (PL_errgv) = newSV (0);
		699	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		700	PL_rs = newSVsv (GvSV (irsgv));
		701	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		702
		703	{
		704	dSP;
		705	LOGOP myop;
		706
		707	Zero (&myop, 1, LOGOP);
		708	myop.op_next = Nullop;
		709	myop.op_flags = OPf_WANT_VOID;
		710
		711	PUSHMARK (SP);
		712	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		713	PUTBACK;
		714	PL_op = (OP *)&myop;
		715	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		716	SPAGAIN;
		717
		718	/*
		719	* now its very tricky. the "tail" of the next transfer might end up
		720	* either in a new cctx, or an existing one.
		721	* in case of an existing one we have to take care of whatever
		722	* entersub and transfer do to the perl stack.
		723	*/
		724	ENTER;
		725	EXTEND (SP, 4);
		726	PUSHs ((SV )0); / items */
		727	PUSHs ((SV )0); / ix, set_stacklevel */
		728	PUSHs ((SV )(sp - PL_stack_base + 1)); / ax */
		729	PUSHs ((SV )0); / again */
		730	PUTBACK;
		731	}
		732
		733	/* this newly created coroutine might be run on an existing cctx which most
		734	* likely was suspended in set_stacklevel, called from entersub.
		735	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		736	* so we ENTER here for symmetry
		737	*/
		738	ENTER;
		739	}
		740
		741	static void
		742	coro_destroy (pTHX_ struct coro *coro)
		743	{
		744	if (!IN_DESTRUCT)
		745	{
		746	/* restore all saved variables and stuff */
		747	LEAVE_SCOPE (0);
		748	assert (PL_tmps_floor == -1);
		749
		750	/* free all temporaries */
		751	FREETMPS;
		752	assert (PL_tmps_ix == -1);
		753
		754	/* unwind all extra stacks */
		755	POPSTACK_TO (PL_mainstack);
		756
		757	/* unwind main stack */
		758	dounwind (-1);
		759	}
		760
		761	SvREFCNT_dec (GvSV (PL_defgv));
		762	SvREFCNT_dec (GvAV (PL_defgv));
		763	SvREFCNT_dec (GvSV (PL_errgv));
		764	SvREFCNT_dec (PL_defoutgv);
		765	SvREFCNT_dec (PL_rs);
		766	SvREFCNT_dec (GvSV (irsgv));
		767
		768	SvREFCNT_dec (PL_diehook);
		769	SvREFCNT_dec (PL_warnhook);
		770
		771	SvREFCNT_dec (coro->saved_deffh);
		772	SvREFCNT_dec (coro->throw);
		773
		774	coro_destroy_stacks (aTHX);
		775	}
		776
		777	static void
		778	free_coro_mortal (pTHX)
		779	{
		780	if (expect_true (coro_mortal))
		781	{
		782	SvREFCNT_dec (coro_mortal);
		783	coro_mortal = 0;
		784	}
		785	}
		786
		787	static int
		788	runops_trace (pTHX)
		789	{
		790	COP *oldcop = 0;
		791	int oldcxix = -2;
		792	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		793	coro_cctx *cctx = coro->cctx;
		794
		795	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		796	{
		797	PERL_ASYNC_CHECK ();
		798
		799	if (cctx->flags & CC_TRACE_ALL)
		800	{
		801	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		802	{
		803	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		804	SV bot, top;
		805	AV av = newAV (); / return values */
		806	SV **cb;
		807	dSP;
		808
		809	GV *gv = CvGV (cx->blk_sub.cv);
		810	SV *fullname = sv_2mortal (newSV (0));
		811	if (isGV (gv))
		812	gv_efullname3 (fullname, gv, 0);
		813
		814	bot = PL_stack_base + cx->blk_oldsp + 1;
		815	top = cx->blk_gimme == G_ARRAY ? SP + 1
		816	: cx->blk_gimme == G_SCALAR ? bot + 1
		817	: bot;
		818
		819	av_extend (av, top - bot);
		820	while (bot < top)
		821	av_push (av, SvREFCNT_inc (*bot++));
		822
		823	PL_runops = RUNOPS_DEFAULT;
		824	ENTER;
		825	SAVETMPS;
		826	EXTEND (SP, 3);
		827	PUSHMARK (SP);
		828	PUSHs (&PL_sv_no);
		829	PUSHs (fullname);
		830	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		831	PUTBACK;
		832	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		833	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		834	SPAGAIN;
		835	FREETMPS;
		836	LEAVE;
		837	PL_runops = runops_trace;
		838	}
		839
		840	if (oldcop != PL_curcop)
		841	{
		842	oldcop = PL_curcop;
		843
		844	if (PL_curcop != &PL_compiling)
		845	{
		846	SV **cb;
		847
		848	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		849	{
		850	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		851
		852	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		853	{
		854	runops_proc_t old_runops = PL_runops;
		855	dSP;
		856	GV *gv = CvGV (cx->blk_sub.cv);
		857	SV *fullname = sv_2mortal (newSV (0));
		858
		859	if (isGV (gv))
		860	gv_efullname3 (fullname, gv, 0);
		861
		862	PL_runops = RUNOPS_DEFAULT;
		863	ENTER;
		864	SAVETMPS;
		865	EXTEND (SP, 3);
		866	PUSHMARK (SP);
		867	PUSHs (&PL_sv_yes);
		868	PUSHs (fullname);
		869	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		870	PUTBACK;
		871	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_sub_cb"), 0);
		872	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		873	SPAGAIN;
		874	FREETMPS;
		875	LEAVE;
		876	PL_runops = runops_trace;
		877	}
		878
		879	oldcxix = cxstack_ix;
		880	}
		881
		882	if (cctx->flags & CC_TRACE_LINE)
		883	{
		884	dSP;
		885
		886	PL_runops = RUNOPS_DEFAULT;
		887	ENTER;
		888	SAVETMPS;
		889	EXTEND (SP, 3);
		890	PL_runops = RUNOPS_DEFAULT;
		891	PUSHMARK (SP);
		892	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		893	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		894	PUTBACK;
		895	cb = hv_fetch ((HV *)SvRV (coro_current), strpair ("_trace_line_cb"), 0);
		896	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		897	SPAGAIN;
		898	FREETMPS;
		899	LEAVE;
		900	PL_runops = runops_trace;
		901	}
		902	}
		903	}
		904	}
		905	}
		906
		907	TAINT_NOT;
		908	return 0;
		909	}
		910
		911	/* inject a fake call to Coro::State::_cctx_init into the execution */
		912	/* _cctx_init should be careful, as it could be called at almost any time */
		913	/* during execution of a perl program */
		914	static void NOINLINE
		915	cctx_prepare (pTHX_ coro_cctx *cctx)
		916	{
538	dSP;	917	dSP;
539	Coro__State ctx = (Coro__State)arg;	918	LOGOP myop;
540	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
541		919
542	coro_init_stacks (aTHX);	920	PL_top_env = &PL_start_env;
543	JMPENV_BOOTSTRAP;	921
		922	if (cctx->flags & CC_TRACE)
		923	PL_runops = runops_trace;
		924
		925	Zero (&myop, 1, LOGOP);
		926	myop.op_next = PL_op;
		927	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		928
		929	PUSHMARK (SP);
		930	EXTEND (SP, 2);
		931	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		932	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		933	PUTBACK;
		934	PL_op = (OP *)&myop;
		935	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
544	SPAGAIN;	936	SPAGAIN;
		937	}
545		938
546	/PL_curcop = 0;/	939	/*
547	SvREFCNT_dec (GvAV (PL_defgv));	940	* this is a _very_ stripped down perl interpreter ;)
548	GvAV (PL_defgv) = ctx->args;	941	*/
		942	static void
		943	cctx_run (void *arg)
		944	{
		945	dTHX;
549		946
550	if (ctx->sptr)	947	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		948	UNLOCK;
		949
		950	/* we now skip the entersub that lead to transfer() */
		951	PL_op = PL_op->op_next;
		952
		953	/* inject a fake subroutine call to cctx_init */
		954	cctx_prepare (aTHX_ (coro_cctx *)arg);
		955
		956	/* somebody or something will hit me for both perl_run and PL_restartop */
		957	PL_restartop = PL_op;
		958	perl_run (PL_curinterp);
		959
		960	/*
		961	* If perl-run returns we assume exit() was being called or the coro
		962	* fell off the end, which seems to be the only valid (non-bug)
		963	* reason for perl_run to return. We try to exit by jumping to the
		964	* bootstrap-time "top" top_env, as we cannot restore the "main"
		965	* coroutine as Coro has no such concept
		966	*/
		967	PL_top_env = main_top_env;
		968	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		969	}
		970
		971	static coro_cctx *
		972	cctx_new ()
		973	{
		974	coro_cctx *cctx;
		975	void *stack_start;
		976	size_t stack_size;
		977
		978	++cctx_count;
		979
		980	Newz (0, cctx, 1, coro_cctx);
		981
		982	#if HAVE_MMAP
		983	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		984	/* mmap supposedly does allocate-on-write for us */
		985	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		986
		987	if (cctx->sptr != (void *)-1)
551	{	988	{
552	PUSHMARK(SP);	989	# if CORO_STACKGUARD
553	PUTBACK;	990	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
554	(void) call_sv (sub_init, G_VOID\|G_NOARGS);	991	# endif
555	croak ("FATAL: CCTXT coroutine returned!");	992	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		993	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		994	cctx->flags \|= CC_MAPPED;
556	}	995	}
557	else	996	else
558	{	997	#endif
559	UNOP myop;
560
561	PL_op = (OP *)&myop;
562
563	Zero(&myop, 1, UNOP);
564	myop.op_next = Nullop;
565	myop.op_flags = OPf_WANT_VOID;
566
567	PUSHMARK(SP);
568	XPUSHs (sub_init);
569	/*
570	* the next line is slightly wrong, as PL_op->op_next
571	* is actually being executed so we skip the first op.
572	* that doesn't matter, though, since it is only
573	* pp_nextstate and we never return...
574	* ah yes, and I don't care anyways ;)
575	*/
576	PUTBACK;
577	PL_op = pp_entersub();
578	SPAGAIN;
579
580	ENTER; /* necessary e.g. for dounwind */
581	}	998	{
582	}	999	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1000	New (0, cctx->sptr, coro_stacksize, long);
583		1001
584	STATIC void	1002	if (!cctx->sptr)
585	transfer(pTHX_ struct coro prev, struct coro next, int flags)
586	{
587	dSP;
588
589	if (prev != next)
590	{
591	/*
592	* this could be done in newprocess which would lead to
593	* extremely elegant and fast (basically just SAVE/LOAD)
594	* code here, but lazy allocation of stacks has also
595	* some virtues and the overhead of the if() is nil.
596	*/
597	if (next->mainstack)
598	{	1003	{
599	SAVE (prev, flags);	1004	perror ("FATAL: unable to allocate stack for coroutine");
600	LOAD (next);	1005	_exit (EXIT_FAILURE);
601
602	/* mark this state as in-use */
603	next->mainstack = 0;
604	next->tmps_ix = -2;
605
606	if (flags & TRANSFER_SAVE_CCTXT)
607	{
608	if (!next->ssize)
609	croak ("destination coroutine has no CCTXT (%p, %d)", next->sptr, next->ssize);
610
611	if (!prev->ssize)
612	prev->ssize = 1; /* mark cctx as valid ;) */
613
614	coro_transfer (&(prev->cctx), &(next->cctx));
615	}
616
617	}	1006	}
618	else if (next->tmps_ix == -2)	1007
619	croak ("tried to transfer to running coroutine");	1008	stack_start = cctx->sptr;
		1009	stack_size = cctx->ssize;
		1010	}
		1011
		1012	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		1013	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1014
		1015	return cctx;
		1016	}
		1017
		1018	static void
		1019	cctx_destroy (coro_cctx *cctx)
		1020	{
		1021	if (!cctx)
		1022	return;
		1023
		1024	--cctx_count;
		1025
		1026	#if CORO_USE_VALGRIND
		1027	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1028	#endif
		1029
		1030	#if HAVE_MMAP
		1031	if (cctx->flags & CC_MAPPED)
		1032	munmap (cctx->sptr, cctx->ssize);
		1033	else
		1034	#endif
		1035	Safefree (cctx->sptr);
		1036
		1037	Safefree (cctx);
		1038	}
		1039
		1040	/* wether this cctx should be destructed */
		1041	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize \|\| ((cctx)->flags & CC_NOREUSE))
		1042
		1043	static coro_cctx *
		1044	cctx_get (pTHX_ int gimme)
		1045	{
		1046	while (expect_true (cctx_first[gimme]))
		1047	{
		1048	coro_cctx *cctx = cctx_first[gimme];
		1049	cctx_first[gimme] = cctx->next;
		1050	--cctx_idle[gimme];
		1051
		1052	if (expect_true (!CCTX_EXPIRED (cctx)))
		1053	return cctx;
		1054
		1055	cctx_destroy (cctx);
		1056	}
		1057
		1058	assert (!gimme);
		1059	return cctx_new ();
		1060	}
		1061
		1062	static void
		1063	cctx_put (coro_cctx *cctx, int gimme)
		1064	{
		1065	/* free another cctx if overlimit */
		1066	if (expect_false (cctx_idle[gimme] >= MAX_IDLE_CCTX))
		1067	{
		1068	coro_cctx *first = cctx_first[gimme];
		1069	cctx_first[gimme] = first->next;
		1070	--cctx_idle[gimme];
		1071
		1072	cctx_destroy (first);
		1073	}
		1074
		1075	++cctx_idle[gimme];
		1076	cctx->next = cctx_first[gimme];
		1077	cctx_first[gimme] = cctx;
		1078	}
		1079
		1080	/ coroutine switching ***************************************************/
		1081
		1082	static void
		1083	transfer_check (pTHX_ struct coro prev, struct coro next)
		1084	{
		1085	if (expect_true (prev != next))
		1086	{
		1087	if (expect_false (!(prev->flags & (CF_RUNNING \| CF_NEW))))
		1088	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1089
		1090	if (expect_false (next->flags & CF_RUNNING))
		1091	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1092
		1093	if (expect_false (next->flags & CF_DESTROYED))
		1094	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1095
		1096	if (
		1097	#if PERL_VERSION_ATLEAST (5,9,0)
		1098	expect_false (PL_parser)
		1099	#else
		1100	expect_false (PL_lex_state != LEX_NOTPARSING)
		1101	#endif
		1102	)
		1103	croak ("Coro::State::transfer called while parsing, but this is not supported");
		1104	}
		1105	}
		1106
		1107	/* always use the TRANSFER macro */
		1108	static void NOINLINE
		1109	transfer (pTHX_ struct coro prev, struct coro next)
		1110	{
		1111	dSTACKLEVEL;
		1112
		1113	/* sometimes transfer is only called to set idle_sp */
		1114	if (expect_false (!next))
		1115	{
		1116	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1117	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		1118	}
		1119	else if (expect_true (prev != next))
		1120	{
		1121	coro_cctx *prev__cctx;
		1122
		1123	if (expect_false (prev->flags & CF_NEW))
		1124	{
		1125	/* create a new empty context */
		1126	Newz (0, prev->cctx, 1, coro_cctx);
		1127	prev->flags &= ~CF_NEW;
		1128	prev->flags \|= CF_RUNNING;
		1129	}
		1130
		1131	prev->flags &= ~CF_RUNNING;
		1132	next->flags \|= CF_RUNNING;
		1133
		1134	LOCK;
		1135
		1136	if (expect_false (next->flags & CF_NEW))
		1137	{
		1138	/* need to start coroutine */
		1139	next->flags &= ~CF_NEW;
		1140	/* first get rid of the old state */
		1141	save_perl (aTHX_ prev);
		1142	/* setup coroutine call */
		1143	coro_setup (aTHX_ next);
		1144	}
620	else	1145	else
621	{	1146	{
622	SAVE (prev, -1); /* first get rid of the old state */	1147	/* coroutine already started */
		1148	save_perl (aTHX_ prev);
		1149	load_perl (aTHX_ next);
		1150	}
623		1151
624	if (flags & TRANSFER_SAVE_CCTXT)	1152	prev__cctx = prev->cctx;
		1153
		1154	/* possibly "free" the cctx */
		1155	if (expect_true (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE)))
		1156	{
		1157	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1158	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1159
		1160	prev->cctx = 0;
		1161
		1162	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1163	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1164	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1165	if (!next->cctx)
		1166	next->cctx = cctx_get (aTHX_ next->gimme);
		1167
		1168	cctx_put (prev__cctx, prev->gimme);
		1169	}
		1170
		1171	++next->usecount;
		1172
		1173	if (expect_true (!next->cctx))
		1174	next->cctx = cctx_get (aTHX_ next->gimme);
		1175
		1176	if (expect_false (prev__cctx != next->cctx))
		1177	{
		1178	prev__cctx->top_env = PL_top_env;
		1179	PL_top_env = next->cctx->top_env;
		1180	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1181	}
		1182
		1183	free_coro_mortal (aTHX);
		1184	UNLOCK;
		1185
		1186	if (expect_false (prev->throw \|\| next->throw))
		1187	{
		1188	struct coro *coro = SvSTATE (coro_current);
		1189
		1190	if (coro->throw)
625	{	1191	{
626	if (!next->ssize)	1192	SV *exception = coro->throw;
627	{	1193	coro->throw = 0;
628	allocate_stack (next);	1194	sv_setsv (ERRSV, exception);
629	coro_create (&(next->cctx),	1195	croak (0);
630	setup_coro, (void *)next,
631	next->sptr, next->ssize);
632	}
633
634	if (!prev->ssize)
635	prev->ssize = 1; /* mark cctx as valid ;) */
636
637	coro_transfer (&(prev->cctx), &(next->cctx));
638	}	1196	}
639	else
640	setup_coro (next);
641	}	1197	}
642	}	1198	}
643	}	1199	}
644		1200
		1201	struct transfer_args
		1202	{
		1203	struct coro prev, next;
		1204	};
		1205
		1206	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1207	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1208
		1209	/ high level stuff ******************************************************/
		1210
		1211	static int
		1212	coro_state_destroy (pTHX_ struct coro *coro)
		1213	{
		1214	if (coro->flags & CF_DESTROYED)
		1215	return 0;
		1216
		1217	coro->flags \|= CF_DESTROYED;
		1218
		1219	if (coro->flags & CF_READY)
		1220	{
		1221	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1222	/* alternative: look through all ready queues and remove the coro */
		1223	LOCK;
		1224	--coro_nready;
		1225	UNLOCK;
		1226	}
		1227	else
		1228	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
		1229
		1230	if (coro->mainstack && coro->mainstack != main_mainstack)
		1231	{
		1232	struct coro temp;
		1233
		1234	if (coro->flags & CF_RUNNING)
		1235	croak ("FATAL: tried to destroy currently running coroutine");
		1236
		1237	save_perl (aTHX_ &temp);
		1238	load_perl (aTHX_ coro);
		1239
		1240	coro_destroy (aTHX_ coro);
		1241
		1242	load_perl (aTHX_ &temp);
		1243
		1244	coro->slot = 0;
		1245	}
		1246
		1247	cctx_destroy (coro->cctx);
		1248	SvREFCNT_dec (coro->args);
		1249
		1250	if (coro->next) coro->next->prev = coro->prev;
		1251	if (coro->prev) coro->prev->next = coro->next;
		1252	if (coro == coro_first) coro_first = coro->next;
		1253
		1254	return 1;
		1255	}
		1256
		1257	static int
		1258	coro_state_free (pTHX_ SV sv, MAGIC mg)
		1259	{
		1260	struct coro coro = (struct coro )mg->mg_ptr;
		1261	mg->mg_ptr = 0;
		1262
		1263	coro->hv = 0;
		1264
		1265	if (--coro->refcnt < 0)
		1266	{
		1267	coro_state_destroy (aTHX_ coro);
		1268	Safefree (coro);
		1269	}
		1270
		1271	return 0;
		1272	}
		1273
		1274	static int
		1275	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1276	{
		1277	struct coro coro = (struct coro )mg->mg_ptr;
		1278
		1279	++coro->refcnt;
		1280
		1281	return 0;
		1282	}
		1283
		1284	static MGVTBL coro_state_vtbl = {
		1285	0, 0, 0, 0,
		1286	coro_state_free,
		1287	0,
		1288	#ifdef MGf_DUP
		1289	coro_state_dup,
		1290	#else
		1291	# define MGf_DUP 0
		1292	#endif
		1293	};
		1294
		1295	static void
		1296	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1297	{
		1298	ta->prev = SvSTATE (prev_sv);
		1299	ta->next = SvSTATE (next_sv);
		1300	TRANSFER_CHECK (*ta);
		1301	}
		1302
		1303	static void
		1304	api_transfer (SV prev_sv, SV next_sv)
		1305	{
		1306	dTHX;
		1307	struct transfer_args ta;
		1308
		1309	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1310	TRANSFER (ta);
		1311	}
		1312
		1313	/ Coro ******************************************************************/
		1314
		1315	static void
		1316	coro_enq (pTHX_ SV *coro_sv)
		1317	{
		1318	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1319	}
		1320
		1321	static SV *
		1322	coro_deq (pTHX_ int min_prio)
		1323	{
		1324	int prio = PRIO_MAX - PRIO_MIN;
		1325
		1326	min_prio -= PRIO_MIN;
		1327	if (min_prio < 0)
		1328	min_prio = 0;
		1329
		1330	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		1331	if (AvFILLp (coro_ready [prio]) >= 0)
		1332	return av_shift (coro_ready [prio]);
		1333
		1334	return 0;
		1335	}
		1336
		1337	static int
		1338	api_ready (SV *coro_sv)
		1339	{
		1340	dTHX;
		1341	struct coro *coro;
		1342
		1343	if (SvROK (coro_sv))
		1344	coro_sv = SvRV (coro_sv);
		1345
		1346	coro = SvSTATE (coro_sv);
		1347
		1348	if (coro->flags & CF_READY)
		1349	return 0;
		1350
		1351	coro->flags \|= CF_READY;
		1352
		1353	LOCK;
		1354	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1355	++coro_nready;
		1356	UNLOCK;
		1357
		1358	return 1;
		1359	}
		1360
		1361	static int
		1362	api_is_ready (SV *coro_sv)
		1363	{
		1364	dTHX;
		1365	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1366	}
		1367
		1368	static void
		1369	prepare_schedule (pTHX_ struct transfer_args *ta)
		1370	{
		1371	SV prev_sv, next_sv;
		1372
		1373	for (;;)
		1374	{
		1375	LOCK;
		1376	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1377
		1378	/* nothing to schedule: call the idle handler */
		1379	if (expect_false (!next_sv))
		1380	{
		1381	dSP;
		1382	UNLOCK;
		1383
		1384	ENTER;
		1385	SAVETMPS;
		1386
		1387	PUSHMARK (SP);
		1388	PUTBACK;
		1389	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1390
		1391	FREETMPS;
		1392	LEAVE;
		1393	continue;
		1394	}
		1395
		1396	ta->next = SvSTATE (next_sv);
		1397
		1398	/* cannot transfer to destroyed coros, skip and look for next */
		1399	if (expect_false (ta->next->flags & CF_DESTROYED))
		1400	{
		1401	UNLOCK;
		1402	SvREFCNT_dec (next_sv);
		1403	/* coro_nready is already taken care of by destroy */
		1404	continue;
		1405	}
		1406
		1407	--coro_nready;
		1408	UNLOCK;
		1409	break;
		1410	}
		1411
		1412	/* free this only after the transfer */
		1413	prev_sv = SvRV (coro_current);
		1414	ta->prev = SvSTATE (prev_sv);
		1415	TRANSFER_CHECK (*ta);
		1416	assert (ta->next->flags & CF_READY);
		1417	ta->next->flags &= ~CF_READY;
		1418	SvRV_set (coro_current, next_sv);
		1419
		1420	LOCK;
		1421	free_coro_mortal (aTHX);
		1422	coro_mortal = prev_sv;
		1423	UNLOCK;
		1424	}
		1425
		1426	static void
		1427	prepare_cede (pTHX_ struct transfer_args *ta)
		1428	{
		1429	api_ready (coro_current);
		1430	prepare_schedule (aTHX_ ta);
		1431	}
		1432
		1433	static int
		1434	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1435	{
		1436	if (coro_nready)
		1437	{
		1438	SV *prev = SvRV (coro_current);
		1439	prepare_schedule (aTHX_ ta);
		1440	api_ready (prev);
		1441	return 1;
		1442	}
		1443	else
		1444	return 0;
		1445	}
		1446
		1447	static void
		1448	api_schedule (void)
		1449	{
		1450	dTHX;
		1451	struct transfer_args ta;
		1452
		1453	prepare_schedule (aTHX_ &ta);
		1454	TRANSFER (ta);
		1455	}
		1456
		1457	static int
		1458	api_cede (void)
		1459	{
		1460	dTHX;
		1461	struct transfer_args ta;
		1462
		1463	prepare_cede (aTHX_ &ta);
		1464
		1465	if (expect_true (ta.prev != ta.next))
		1466	{
		1467	TRANSFER (ta);
		1468	return 1;
		1469	}
		1470	else
		1471	return 0;
		1472	}
		1473
		1474	static int
		1475	api_cede_notself (void)
		1476	{
		1477	dTHX;
		1478	struct transfer_args ta;
		1479
		1480	if (prepare_cede_notself (aTHX_ &ta))
		1481	{
		1482	TRANSFER (ta);
		1483	return 1;
		1484	}
		1485	else
		1486	return 0;
		1487	}
		1488
		1489	static void
		1490	api_trace (SV *coro_sv, int flags)
		1491	{
		1492	dTHX;
		1493	struct coro *coro = SvSTATE (coro_sv);
		1494
		1495	if (flags & CC_TRACE)
		1496	{
		1497	if (!coro->cctx)
		1498	coro->cctx = cctx_new ();
		1499	else if (!(coro->cctx->flags & CC_TRACE))
		1500	croak ("cannot enable tracing on coroutine with custom stack");
		1501
		1502	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1503	}
		1504	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1505	{
		1506	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1507
		1508	if (coro->flags & CF_RUNNING)
		1509	PL_runops = RUNOPS_DEFAULT;
		1510	else
		1511	coro->slot->runops = RUNOPS_DEFAULT;
		1512	}
		1513	}
		1514
645	MODULE = Coro::State PACKAGE = Coro::State	1515	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
646		1516
647	PROTOTYPES: ENABLE	1517	PROTOTYPES: DISABLE
648		1518
649	BOOT:	1519	BOOT:
650	{ /* {} necessary for stoopid perl-5.6.x */	1520	{
		1521	#ifdef USE_ITHREADS
		1522	MUTEX_INIT (&coro_mutex);
		1523	#endif
		1524	BOOT_PAGESIZE;
		1525
		1526	irsgv = gv_fetchpv ("/" , GV_ADD\|GV_NOTQUAL, SVt_PV);
		1527	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD\|GV_NOTQUAL, SVt_PVIO);
		1528
		1529	hv_sig = coro_get_hv ("SIG", TRUE);
		1530	sv_diehook = coro_get_sv ("Coro::State::DIEHOOK" , TRUE);
		1531	sv_warnhook = coro_get_sv ("Coro::State::WARNHOOK", TRUE);
		1532
		1533	if (!PL_diehook ) hv_store (hv_sig, strpair ("__DIE__" ), SvREFCNT_inc (sv_diehook ), 0);
		1534	if (!PL_warnhook) hv_store (hv_sig, strpair ("__WARN__"), SvREFCNT_inc (sv_warnhook), 0);
		1535
651	coro_state_stash = gv_stashpvn ("Coro::State", 10, TRUE);	1536	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
652		1537
653	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1538	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
654	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1539	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
655	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1540	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
656	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1541	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
657
658	if (!padlist_cache)
659	padlist_cache = newHV ();
660		1542
661	main_mainstack = PL_mainstack;	1543	main_mainstack = PL_mainstack;
662	}	1544	main_top_env = PL_top_env;
663		1545
664	Coro::State	1546	while (main_top_env->je_prev)
665	_newprocess(args)	1547	main_top_env = main_top_env->je_prev;
666	SV * args	1548
667	PROTOTYPE: $	1549	coroapi.ver = CORO_API_VERSION;
		1550	coroapi.rev = CORO_API_REVISION;
		1551	coroapi.transfer = api_transfer;
		1552
		1553	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1554	}
		1555
		1556	SV *
		1557	new (char *klass, ...)
668	CODE:	1558	CODE:
669	Coro__State coro;	1559	{
		1560	struct coro *coro;
		1561	HV *hv;
		1562	int i;
670		1563
671	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
672	croak ("Coro::State::_newprocess expects an arrayref");
673
674	New (0, coro, 1, struct coro);	1564	Newz (0, coro, 1, struct coro);
		1565	coro->args = newAV ();
		1566	coro->flags = CF_NEW;
675		1567
676	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1568	if (coro_first) coro_first->prev = coro;
677	coro->mainstack = 0; /* actual work is done inside transfer */	1569	coro->next = coro_first;
678	coro->sptr = 0;	1570	coro_first = coro;
679	coro->ssize = 0;
680		1571
681	RETVAL = coro;	1572	coro->hv = hv = newHV ();
		1573	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1574	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1575
		1576	av_extend (coro->args, items - 1);
		1577	for (i = 1; i < items; i++)
		1578	av_push (coro->args, newSVsv (ST (i)));
		1579	}
682	OUTPUT:	1580	OUTPUT:
683	RETVAL	1581	RETVAL
684		1582
		1583	# these not obviously related functions are all rolled into the same xs
		1584	# function to increase chances that they all will call transfer with the same
		1585	# stack offset
685	void	1586	void
686	transfer(prev, next, flags = TRANSFER_SAVE_ALL)	1587	_set_stacklevel (...)
687	Coro::State_or_hashref prev	1588	ALIAS:
688	Coro::State_or_hashref next	1589	Coro::State::transfer = 1
689	int flags	1590	Coro::schedule = 2
690	PROTOTYPE: @	1591	Coro::cede = 3
		1592	Coro::cede_notself = 4
691	CODE:	1593	CODE:
692	transfer (aTHX_ prev, next, flags);	1594	{
		1595	struct transfer_args ta;
		1596
		1597	switch (ix)
		1598	{
		1599	case 0:
		1600	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1601	ta.next = 0;
		1602	break;
		1603
		1604	case 1:
		1605	if (items != 2)
		1606	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1607
		1608	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1609	break;
		1610
		1611	case 2:
		1612	prepare_schedule (aTHX_ &ta);
		1613	break;
		1614
		1615	case 3:
		1616	prepare_cede (aTHX_ &ta);
		1617	break;
		1618
		1619	case 4:
		1620	if (!prepare_cede_notself (aTHX_ &ta))
		1621	XSRETURN_EMPTY;
		1622
		1623	break;
		1624	}
		1625
		1626	BARRIER;
		1627	PUTBACK;
		1628	TRANSFER (ta);
		1629	SPAGAIN; /* might be the sp of a different coroutine now */
		1630	/* be extra careful not to ever do anything after TRANSFER */
		1631	}
		1632
		1633	bool
		1634	_destroy (SV *coro_sv)
		1635	CODE:
		1636	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1637	OUTPUT:
		1638	RETVAL
693		1639
694	void	1640	void
695	DESTROY(coro)	1641	_exit (code)
696	Coro::State coro	1642	int code
697	CODE:	1643	PROTOTYPE: $
		1644	CODE:
		1645	_exit (code);
698		1646
699	if (coro->mainstack && coro->mainstack != main_mainstack)	1647	int
		1648	cctx_stacksize (int new_stacksize = 0)
		1649	CODE:
		1650	RETVAL = coro_stacksize;
		1651	if (new_stacksize)
		1652	coro_stacksize = new_stacksize;
		1653	OUTPUT:
		1654	RETVAL
		1655
		1656	int
		1657	cctx_count ()
		1658	CODE:
		1659	RETVAL = cctx_count;
		1660	OUTPUT:
		1661	RETVAL
		1662
		1663	int
		1664	cctx_idle ()
		1665	CODE:
		1666	RETVAL = cctx_idle[0] + cctx_idle[1] + cctx_idle[2];
		1667	OUTPUT:
		1668	RETVAL
		1669
		1670	void
		1671	list ()
		1672	PPCODE:
		1673	{
		1674	struct coro *coro;
		1675	for (coro = coro_first; coro; coro = coro->next)
		1676	if (coro->hv)
		1677	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1678	}
		1679
		1680	void
		1681	call (Coro::State coro, SV *coderef)
		1682	ALIAS:
		1683	eval = 1
		1684	CODE:
		1685	{
		1686	if (coro->mainstack)
700	{	1687	{
701	struct coro temp;	1688	struct coro temp;
702		1689
703	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);	1690	if (!(coro->flags & CF_RUNNING))
704	LOAD(aTHX_ coro);	1691	{
		1692	save_perl (aTHX_ &temp);
		1693	load_perl (aTHX_ coro);
		1694	}
705		1695
706	destroy_stacks (aTHX);	1696	{
		1697	dSP;
		1698	ENTER;
		1699	SAVETMPS;
		1700	PUTBACK;
		1701	PUSHSTACK;
		1702	PUSHMARK (SP);
707		1703
708	LOAD((&temp)); /* this will get rid of defsv etc.. */	1704	if (ix)
		1705	eval_sv (coderef, 0);
		1706	else
		1707	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
709		1708
710	coro->mainstack = 0;	1709	POPSTACK;
		1710	FREETMPS;
		1711	LEAVE;
		1712	PUTBACK;
		1713	}
		1714
		1715	if (!(coro->flags & CF_RUNNING))
		1716	{
		1717	save_perl (aTHX_ coro);
		1718	load_perl (aTHX_ &temp);
		1719	}
711	}	1720	}
		1721	}
712		1722
713	if (coro->sptr)	1723	SV *
		1724	is_ready (Coro::State coro)
		1725	PROTOTYPE: $
		1726	ALIAS:
		1727	is_ready = CF_READY
		1728	is_running = CF_RUNNING
		1729	is_new = CF_NEW
		1730	is_destroyed = CF_DESTROYED
		1731	CODE:
		1732	RETVAL = boolSV (coro->flags & ix);
		1733	OUTPUT:
		1734	RETVAL
		1735
		1736	void
		1737	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1738
		1739	SV *
		1740	has_stack (Coro::State coro)
		1741	PROTOTYPE: $
		1742	CODE:
		1743	RETVAL = boolSV (!!coro->cctx);
		1744	OUTPUT:
		1745	RETVAL
		1746
		1747	int
		1748	is_traced (Coro::State coro)
		1749	PROTOTYPE: $
		1750	CODE:
		1751	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1752	OUTPUT:
		1753	RETVAL
		1754
		1755	IV
		1756	rss (Coro::State coro)
		1757	PROTOTYPE: $
		1758	ALIAS:
		1759	usecount = 1
		1760	CODE:
		1761	switch (ix)
		1762	{
		1763	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1764	case 1: RETVAL = coro->usecount; break;
		1765	}
		1766	OUTPUT:
		1767	RETVAL
		1768
		1769
		1770	MODULE = Coro::State PACKAGE = Coro
		1771
		1772	BOOT:
		1773	{
		1774	int i;
		1775
		1776	sv_pool_rss = coro_get_sv ("Coro::POOL_RSS" , TRUE);
		1777	sv_pool_size = coro_get_sv ("Coro::POOL_SIZE" , TRUE);
		1778	av_async_pool = coro_get_av ("Coro::async_pool", TRUE);
		1779
		1780	coro_current = coro_get_sv ("Coro::current", FALSE);
		1781	SvREADONLY_on (coro_current);
		1782
		1783	coro_stash = gv_stashpv ("Coro", TRUE);
		1784
		1785	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1786	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1787	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1788	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1789	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1790	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1791
		1792	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
		1793	coro_ready[i] = newAV ();
		1794
		1795	{
		1796	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1797	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
		1798
		1799	coroapi.schedule = api_schedule;
		1800	coroapi.cede = api_cede;
		1801	coroapi.cede_notself = api_cede_notself;
		1802	coroapi.ready = api_ready;
		1803	coroapi.is_ready = api_is_ready;
		1804	coroapi.nready = &coro_nready;
		1805	coroapi.current = coro_current;
		1806
		1807	GCoroAPI = &coroapi;
		1808	sv_setiv (sv, (IV)&coroapi);
		1809	SvREADONLY_on (sv);
		1810	}
		1811	}
		1812
		1813	void
		1814	_set_current (SV *current)
		1815	PROTOTYPE: $
		1816	CODE:
		1817	SvREFCNT_dec (SvRV (coro_current));
		1818	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1819
		1820	int
		1821	prio (Coro::State coro, int newprio = 0)
		1822	ALIAS:
		1823	nice = 1
		1824	CODE:
		1825	{
		1826	RETVAL = coro->prio;
		1827
		1828	if (items > 1)
714	{	1829	{
715	deallocate_stack (coro);	1830	if (ix)
		1831	newprio = coro->prio - newprio;
		1832
		1833	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1834	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1835
716	coro->sptr = 0;	1836	coro->prio = newprio;
717	}	1837	}
		1838	}
		1839	OUTPUT:
		1840	RETVAL
718		1841
719	Safefree (coro);	1842	SV *
		1843	ready (SV *self)
		1844	PROTOTYPE: $
		1845	CODE:
		1846	RETVAL = boolSV (api_ready (self));
		1847	OUTPUT:
		1848	RETVAL
		1849
		1850	int
		1851	nready (...)
		1852	PROTOTYPE:
		1853	CODE:
		1854	RETVAL = coro_nready;
		1855	OUTPUT:
		1856	RETVAL
720		1857
721	void	1858	void
722	flush()	1859	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1860	PROTOTYPE: $;$
		1861	CODE:
		1862	SvREFCNT_dec (self->throw);
		1863	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1864
		1865	# for async_pool speedup
		1866	void
		1867	_pool_1 (SV *cb)
723	CODE:	1868	CODE:
724	#ifdef MAY_FLUSH	1869	{
725	flush_padlist_cache ();	1870	struct coro *coro = SvSTATE (coro_current);
726	#endif	1871	HV hv = (HV )SvRV (coro_current);
		1872	AV *defav = GvAV (PL_defgv);
		1873	SV *invoke = hv_delete (hv, strpair ("_invoke"), 0);
		1874	AV *invoke_av;
		1875	int i, len;
727		1876
728	MODULE = Coro::State PACKAGE = Coro::Cont	1877	if (!invoke)
		1878	croak ("\3async_pool terminate\2\n");
729		1879
730	# this is slightly dirty	1880	SvREFCNT_dec (coro->saved_deffh);
		1881	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1882
		1883	hv_store (hv, "desc", sizeof ("desc") - 1,
		1884	newSVpvn (strpair ("[async_pool]")), 0);
		1885
		1886	invoke_av = (AV *)SvRV (invoke);
		1887	len = av_len (invoke_av);
		1888
		1889	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1890
		1891	if (len > 0)
		1892	{
		1893	av_fill (defav, len - 1);
		1894	for (i = 0; i < len; ++i)
		1895	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1896	}
		1897
		1898	SvREFCNT_dec (invoke);
		1899	}
731		1900
732	void	1901	void
733	yield(...)	1902	_pool_2 (SV *cb)
		1903	CODE:
		1904	{
		1905	struct coro *coro = SvSTATE (coro_current);
		1906
		1907	sv_setsv (cb, &PL_sv_undef);
		1908
		1909	SvREFCNT_dec ((SV )PL_defoutgv); PL_defoutgv = (GV )coro->saved_deffh;
		1910	coro->saved_deffh = 0;
		1911
		1912	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1913	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1914	croak ("\3async_pool terminate\2\n");
		1915
		1916	av_clear (GvAV (PL_defgv));
		1917	hv_store ((HV *)SvRV (coro_current), strpair ("desc"),
		1918	newSVpvn (strpair ("[async_pool idle]")), 0);
		1919
		1920	coro->prio = 0;
		1921
		1922	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1923	api_trace (coro_current, 0);
		1924
		1925	av_push (av_async_pool, newSVsv (coro_current));
		1926	}
		1927
		1928
		1929	MODULE = Coro::State PACKAGE = Coro::AIO
		1930
		1931	SV *
		1932	_get_state ()
		1933	CODE:
		1934	{
		1935	struct io_state *data;
		1936
		1937	RETVAL = newSV (sizeof (struct io_state));
		1938	data = (struct io_state *)SvPVX (RETVAL);
		1939	SvCUR_set (RETVAL, sizeof (struct io_state));
		1940	SvPOK_only (RETVAL);
		1941
		1942	data->errorno = errno;
		1943	data->laststype = PL_laststype;
		1944	data->laststatval = PL_laststatval;
		1945	data->statcache = PL_statcache;
		1946	}
		1947	OUTPUT:
		1948	RETVAL
		1949
		1950	void
		1951	_set_state (char *data_)
734	PROTOTYPE: @	1952	PROTOTYPE: $
735	CODE:	1953	CODE:
736	static SV *returnstk;	1954	{
737	SV *sv;	1955	struct io_state data = (void )data_;
738	AV *defav = GvAV (PL_defgv);
739	struct coro prev, next;
740		1956
741	if (!returnstk)	1957	errno = data->errorno;
742	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));	1958	PL_laststype = data->laststype;
		1959	PL_laststatval = data->laststatval;
		1960	PL_statcache = data->statcache;
		1961	}
743		1962
744	/* set up @_ -- ugly */
745	av_clear (defav);
746	av_fill (defav, items - 1);
747	while (items--)
748	av_store (defav, items, SvREFCNT_inc (ST(items)));
749
750	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
751	sv = av_pop ((AV *)SvRV (returnstk));
752	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
753	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
754	SvREFCNT_dec (sv);
755
756	transfer(aTHX_ prev, next, 0);
757

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Comparing Coro/Coro/State.xs (file contents): Revision 1.13 by root, Mon Jul 23 22:09:39 2001 UTC vs. Revision 1.210 by root, Wed Oct 10 03:24:40 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.13 by root, Mon Jul 23 22:09:39 2001 UTC vs.
Revision 1.210 by root, Wed Oct 10 03:24:40 2007 UTC