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

Diff Legend

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

Comparing Coro/Coro/State.xs (file contents): Revision 1.13 by root, Mon Jul 23 22:09:39 2001 UTC vs. Revision 1.166 by root, Wed Sep 26 21:11:28 2007 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.13 by root, Mon Jul 23 22:09:39 2001 UTC vs.
Revision 1.166 by root, Wed Sep 26 21:11:28 2007 UTC