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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.21 by root, Sat Aug 11 19:59:19 2001 UTC vs.
Revision 1.157 by root, Fri Sep 21 02:01:13 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"
6		10
7	#include <signal.h>	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
8		14
9	#ifdef HAVE_MMAP	15	#ifdef HAVE_MMAP
10	# include <unistd.h>	16	# include <unistd.h>
11	# include <sys/mman.h>	17	# include <sys/mman.h>
12	# ifndef MAP_ANON
13	# ifdef MAP_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
14	# define MAP_ANON MAP_ANONYMOUS	19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
15	# else	21	# else
16	# undef HAVE_MMAP	22	# undef HAVE_MMAP
17	# endif	23	# endif
18	# 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
19	#endif	32	# endif
20
21	#define MAY_FLUSH /* increases codesize */
22
23	/* perl-related */
24	#define TRANSFER_SAVE_DEFAV 0x00000001
25	#define TRANSFER_SAVE_DEFSV 0x00000002
26	#define TRANSFER_SAVE_ERRSV 0x00000004
27	/* c-related */
28	#define TRANSFER_SAVE_CCTXT 0x00000008
29	#ifdef CORO_LAZY_STACK
30	# define TRANSFER_LAZY_STACK 0x00000010
31	#else	33	#else
32	# define TRANSFER_LAZY_STACK 0x00000000	34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	\|\| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
		55	# ifndef PL_ppaddr
		56	# define PL_ppaddr ppaddr
33	#endif	57	# endif
		58	# ifndef call_sv
		59	# define call_sv perl_call_sv
		60	# endif
		61	# ifndef get_sv
		62	# define get_sv perl_get_sv
		63	# endif
		64	# ifndef get_cv
		65	# define get_cv perl_get_cv
		66	# endif
		67	# ifndef IS_PADGV
		68	# define IS_PADGV(v) 0
		69	# endif
		70	# ifndef IS_PADCONST
		71	# define IS_PADCONST(v) 0
		72	# endif
		73	#endif
34		74
35	#define TRANSFER_SAVE_ALL (TRANSFER_SAVE_DEFAV\|TRANSFER_SAVE_DEFSV \	75	/* 5.8.7 */
36	\|TRANSFER_SAVE_ERRSV\|TRANSFER_SAVE_CCTXT)	76	#ifndef SvRV_set
		77	# define SvRV_set(s,v) SvRV(s) = (v)
		78	#endif
37		79
38	#define SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
39	#define UCORO_STATE "_coro_state"	81	# undef CORO_STACKGUARD
		82	#endif
40		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
41	/* The next macro should delcare a variable stacklevel that contains and approximation	93	/* The next macro should declare a variable stacklevel that contains and approximation
42	* to the current C stack pointer. It's property is that it changes with each call	94	* to the current C stack pointer. Its property is that it changes with each call
43	* and should be unique. */	95	* and should be unique. */
		96	#define dSTACKLEVEL int stacklevel
44	#define dSTACKLEVEL void *stacklevel = &stacklevel	97	#define STACKLEVEL ((void *)&stacklevel)
45		98
46	#define labs(l) ((l) >= 0 ? (l) : -(l))	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
47		100
48	/* this is actually not only the c stack but also c registers etc... */	101	#if __GNUC__ >= 3
		102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		104	#else
		105	# define attribute(x)
		106	# define BARRIER
		107	#endif
		108
		109	#define NOINLINE attribute ((noinline))
		110
		111	#include "CoroAPI.h"
		112
		113	#ifdef USE_ITHREADS
		114	static perl_mutex coro_mutex;
		115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		117	#else
		118	# define LOCK (void)0
		119	# define UNLOCK (void)0
		120	#endif
		121
		122	/* helper storage struct for Coro::AIO */
		123	struct io_state
		124	{
		125	int errorno;
		126	I32 laststype;
		127	int laststatval;
		128	Stat_t statcache;
		129	};
		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
		132	static struct CoroAPI coroapi;
		133	static AV main_mainstack; / used to differentiate between $main and others */
		134	static JMPENV *main_top_env;
		135	static HV coro_state_stash, coro_stash;
		136	static SV coro_mortal; / will be freed after next transfer */
		137
		138	static struct coro_cctx *cctx_first;
		139	static int cctx_count, cctx_idle;
		140
		141	/* this is a structure representing a c-level coroutine */
49	typedef struct {	142	typedef struct coro_cctx {
50	int refcnt; /* pointer reference counter */	143	struct coro_cctx *next;
51	int usecnt; /* shared by how many coroutines */
52	int gencnt; /* generation counter */
53		144
		145	/* the stack */
		146	void *sptr;
		147	size_t ssize;
		148
		149	/* cpu state */
		150	void idle_sp; / sp of top-level transfer/schedule/cede call */
		151	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		152	JMPENV *top_env;
54	coro_context cctx;	153	coro_context cctx;
55		154
56	void *sptr;	155	#if CORO_USE_VALGRIND
57	long ssize; /* positive == mmap, otherwise malloc */	156	int valgrind_id;
58	} coro_stack;	157	#endif
		158	char inuse, mapped;
		159	} coro_cctx;
59		160
		161	enum {
		162	CF_RUNNING = 0x0001, /* coroutine is running */
		163	CF_READY = 0x0002, /* coroutine is ready */
		164	CF_NEW = 0x0004, /* has never been switched to */
		165	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		166	};
		167
		168	/* this is a structure representing a perl-level coroutine */
60	struct coro {	169	struct coro {
61	/* the optional C context */	170	/* the c coroutine allocated to this perl coroutine, if any */
62	coro_stack *stack;	171	coro_cctx *cctx;
63	void *cursp;
64	int gencnt;
65
66	/* optionally saved, might be zero */
67	AV *defav;
68	SV *defsv;
69	SV *errsv;
70
71	/* saved global state not related to stacks */
72	U8 dowarn;
73	I32 in_eval;
74
75	/* the stacks and related info (callchain etc..) */
76	PERL_SI *curstackinfo;
77	AV *curstack;
78	AV *mainstack;
79	SV **stack_sp;
80	OP *op;
81	SV **curpad;
82	SV **stack_base;
83	SV **stack_max;
84	SV **tmps_stack;
85	I32 tmps_floor;
86	I32 tmps_ix;
87	I32 tmps_max;
88	I32 *markstack;
89	I32 *markstack_ptr;
90	I32 *markstack_max;
91	I32 *scopestack;
92	I32 scopestack_ix;
93	I32 scopestack_max;
94	ANY *savestack;
95	I32 savestack_ix;
96	I32 savestack_max;
97	OP **retstack;
98	I32 retstack_ix;
99	I32 retstack_max;
100	COP *curcop;
101	JMPENV *top_env;
102		172
103	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
104	AV *args;	174	AV *args;
		175	int refcnt;
		176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
		178
		179	/* optionally saved, might be zero */
		180	AV defav; / @_ */
		181	SV defsv; / $_ */
		182	SV errsv; / $@ */
		183	GV deffh; / default filehandle */
		184	SV irssv; / $/ */
		185	SV irssv_sv; / real $/ cache */
		186
		187	#define VAR(name,type) type name;
		188	# include "state.h"
		189	#undef VAR
		190
		191	/* coro process data */
		192	int prio;
		193
		194	/* linked list */
		195	struct coro next, prev;
		196	HV hv; / the perl hash associated with this coro, if any */
105	};	197	};
106		198
107	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
108	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
109		201
110	static AV main_mainstack; / used to differentiate between $main and others */	202	/ Coro ******************************************************************/
111	static HV *coro_state_stash;	203
112	static SV *ucoro_state_sv;	204	#define PRIO_MAX 3
113	static U32 ucoro_state_hash;	205	#define PRIO_HIGH 1
114	static HV *padlist_cache;	206	#define PRIO_NORMAL 0
		207	#define PRIO_LOW -1
		208	#define PRIO_IDLE -3
		209	#define PRIO_MIN -4
115		210
116	/* for Coro.pm */	211	/* for Coro.pm */
117	static GV coro_current, coro_idle;	212	static SV *coro_current;
		213	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
118	static AV *coro_ready;	214	static int coro_nready;
		215	static struct coro *coro_first;
119		216
120	/* mostly copied from op.c:cv_clone2 */	217	/ lowlevel stuff ********************************************************/
121	STATIC AV *	218
122	clone_padlist (AV *protopadlist)	219	static AV *
		220	coro_clone_padlist (pTHX_ CV *cv)
123	{	221	{
124	AV *av;	222	AV *padlist = CvPADLIST (cv);
125	I32 ix;
126	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
127	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
128	SV **pname = AvARRAY (protopad_name);
129	SV **ppad = AvARRAY (protopad);
130	I32 fname = AvFILLp (protopad_name);
131	I32 fpad = AvFILLp (protopad);
132	AV newpadlist, newpad_name, *newpad;	223	AV newpadlist, newpad;
133	SV **npad;
134
135	newpad_name = newAV ();
136	for (ix = fname; ix >= 0; ix--)
137	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
138
139	newpad = newAV ();
140	av_fill (newpad, AvFILLp (protopad));
141	npad = AvARRAY (newpad);
142		224
143	newpadlist = newAV ();	225	newpadlist = newAV ();
144	AvREAL_off (newpadlist);	226	AvREAL_off (newpadlist);
145	av_store (newpadlist, 0, (SV *) newpad_name);	227	#if PERL_VERSION_ATLEAST (5,9,0)
		228	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		229	#else
		230	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		231	#endif
		232	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		233	--AvFILLp (padlist);
		234
		235	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
146	av_store (newpadlist, 1, (SV *) newpad);	236	av_store (newpadlist, 1, (SV *)newpad);
147		237
148	av = newAV (); /* will be @_ */	238	return newpadlist;
149	av_extend (av, 0);	239	}
150	av_store (newpad, 0, (SV *) av);
151	AvFLAGS (av) = AVf_REIFY;
152		240
153	for (ix = fpad; ix > 0; ix--)	241	static void
		242	free_padlist (pTHX_ AV *padlist)
		243	{
		244	/* may be during global destruction */
		245	if (SvREFCNT (padlist))
154	{	246	{
155	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	247	I32 i = AvFILLp (padlist);
156	if (namesv && namesv != &PL_sv_undef)	248	while (i >= 0)
157	{	249	{
158	char name = SvPVX (namesv); / XXX */	250	SV **svp = av_fetch (padlist, i--, FALSE);
159	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')	251	if (svp)
160	{ /* lexical from outside? */
161	npad[ix] = SvREFCNT_inc (ppad[ix]);
162	}	252	{
163	else
164	{ /* our own lexical */
165	SV *sv;	253	SV *sv;
166	if (*name == '&')	254	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
167	sv = SvREFCNT_inc (ppad[ix]);	255	SvREFCNT_dec (sv);
168	else if (*name == '@')	256
169	sv = (SV *) newAV ();	257	SvREFCNT_dec (*svp);
170	else if (*name == '%')
171	sv = (SV *) newHV ();
172	else
173	sv = NEWSV (0, 0);
174	if (!SvPADBUSY (sv))
175	SvPADMY_on (sv);
176	npad[ix] = sv;
177	}	258	}
178	}	259	}
179	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))	260
		261	SvREFCNT_dec ((SV*)padlist);
		262	}
		263	}
		264
		265	static int
		266	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		267	{
		268	AV *padlist;
		269	AV av = (AV )mg->mg_obj;
		270
		271	/* casting is fun. */
		272	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		273	free_padlist (aTHX_ padlist);
		274
		275	SvREFCNT_dec (av);
		276
		277	return 0;
		278	}
		279
		280	#define PERL_MAGIC_coro PERL_MAGIC_ext
		281
		282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		283
		284	#define CORO_MAGIC(cv) \
		285	SvMAGIC (cv) \
		286	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		287	? SvMAGIC (cv) \
		288	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		289	: 0
		290
		291	/* the next two functions merely cache the padlists */
		292	static void
		293	get_padlist (pTHX_ CV *cv)
		294	{
		295	MAGIC *mg = CORO_MAGIC (cv);
		296	AV *av;
		297
		298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
		299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		300	else
		301	{
		302	#if CORO_PREFER_PERL_FUNCTIONS
		303	/* this is probably cleaner, but also slower? */
		304	CV *cp = Perl_cv_clone (cv);
		305	CvPADLIST (cv) = CvPADLIST (cp);
		306	CvPADLIST (cp) = 0;
		307	SvREFCNT_dec (cp);
		308	#else
		309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		310	#endif
		311	}
		312	}
		313
		314	static void
		315	put_padlist (pTHX_ CV *cv)
		316	{
		317	MAGIC *mg = CORO_MAGIC (cv);
		318	AV *av;
		319
		320	if (!mg)
		321	{
		322	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		323	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		324	mg->mg_virtual = &vtbl_coro;
		325	mg->mg_obj = (SV *)newAV ();
		326	}
		327
		328	av = (AV *)mg->mg_obj;
		329
		330	if (AvFILLp (av) >= AvMAX (av))
		331	av_extend (av, AvMAX (av) + 1);
		332
		333	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
		334	}
		335
		336	/ load & save, init *****************************************************/
		337
		338	#define SB do {
		339	#define SE } while (0)
		340
		341	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
		342
		343	static void
		344	load_perl (pTHX_ Coro__State c)
		345	{
		346	#define VAR(name,type) PL_ ## name = c->name;
		347	# include "state.h"
		348	#undef VAR
		349
		350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
		351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
		352	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		353	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		354
		355	if (c->irssv)
		356	{
		357	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
180	{	358	{
181	npad[ix] = SvREFCNT_inc (ppad[ix]);	359	SvREFCNT_dec (c->irssv);
		360	c->irssv = 0;
182	}	361	}
183	else	362	else
184	{	363	{
185	SV *sv = NEWSV (0, 0);	364	REPLACE_SV (PL_rs, c->irssv);
186	SvPADTMP_on (sv);	365	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
187	npad[ix] = sv;	366	sv_setsv (c->irssv_sv, PL_rs);
188	}	367	}
189	}	368	}
190
191	#if 0 /* return -ENOTUNDERSTOOD */
192	/* Now that vars are all in place, clone nested closures. */
193
194	for (ix = fpad; ix > 0; ix--) {
195	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
196	if (namesv
197	&& namesv != &PL_sv_undef
198	&& !(SvFLAGS(namesv) & SVf_FAKE)
199	&& *SvPVX(namesv) == '&'
200	&& CvCLONE(ppad[ix]))
201	{
202	CV kid = cv_clone((CV)ppad[ix]);
203	SvREFCNT_dec(ppad[ix]);
204	CvCLONE_on(kid);
205	SvPADMY_on(kid);
206	npad[ix] = (SV*)kid;
207	}
208	}
209	#endif
210
211	return newpadlist;
212	}
213
214	#ifdef MAY_FLUSH
215	STATIC AV *
216	free_padlist (AV *padlist)
217	{
218	/* may be during global destruction */
219	if (SvREFCNT(padlist))
220	{
221	I32 i = AvFILLp(padlist);
222	while (i >= 0)
223	{
224	SV **svp = av_fetch(padlist, i--, FALSE);
225	SV sv = svp ? svp : Nullsv;
226	if (sv)
227	SvREFCNT_dec(sv);
228	}
229
230	SvREFCNT_dec((SV*)padlist);
231	}
232	}
233	#endif
234
235	/* the next two functions merely cache the padlists */
236	STATIC void
237	get_padlist (CV *cv)
238	{
239	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);
240
241	if (he && AvFILLp ((AV )he) >= 0)
242	CvPADLIST (cv) = (AV )av_pop ((AV )*he);
243	else
244	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
245	}
246
247	STATIC void
248	put_padlist (CV *cv)
249	{
250	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);
251
252	if (SvTYPE (*he) != SVt_PVAV)
253	{
254	SvREFCNT_dec (*he);
255	he = (SV )newAV ();
256	}
257
258	av_push ((AV )he, (SV *)CvPADLIST (cv));
259	}
260
261	#ifdef MAY_FLUSH
262	STATIC void
263	flush_padlist_cache ()
264	{
265	HV *hv = padlist_cache;
266	padlist_cache = newHV ();
267
268	if (hv_iterinit (hv))
269	{
270	HE *he;
271	AV *padlist;
272
273	while (!!(he = hv_iternext (hv)))
274	{
275	AV av = (AV )HeVAL(he);
276
277	/* casting is fun. */
278	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
279	free_padlist (padlist);
280	}
281	}
282
283	SvREFCNT_dec (hv);
284	}
285	#endif
286
287	#define SB do {
288	#define SE } while (0)
289
290	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
291	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
292
293	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
294
295	static void
296	load_state(pTHX_ Coro__State c)
297	{
298	PL_dowarn = c->dowarn;
299	PL_in_eval = c->in_eval;
300
301	PL_curstackinfo = c->curstackinfo;
302	PL_curstack = c->curstack;
303	PL_mainstack = c->mainstack;
304	PL_stack_sp = c->stack_sp;
305	PL_op = c->op;
306	PL_curpad = c->curpad;
307	PL_stack_base = c->stack_base;
308	PL_stack_max = c->stack_max;
309	PL_tmps_stack = c->tmps_stack;
310	PL_tmps_floor = c->tmps_floor;
311	PL_tmps_ix = c->tmps_ix;
312	PL_tmps_max = c->tmps_max;
313	PL_markstack = c->markstack;
314	PL_markstack_ptr = c->markstack_ptr;
315	PL_markstack_max = c->markstack_max;
316	PL_scopestack = c->scopestack;
317	PL_scopestack_ix = c->scopestack_ix;
318	PL_scopestack_max = c->scopestack_max;
319	PL_savestack = c->savestack;
320	PL_savestack_ix = c->savestack_ix;
321	PL_savestack_max = c->savestack_max;
322	PL_retstack = c->retstack;
323	PL_retstack_ix = c->retstack_ix;
324	PL_retstack_max = c->retstack_max;
325	PL_curcop = c->curcop;
326	PL_top_env = c->top_env;
327
328	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
329	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
330	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
331		369
332	{	370	{
333	dSP;	371	dSP;
334	CV *cv;	372	CV *cv;
335		373
336	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
337	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
338	{	376	{
339	AV padlist = (AV )POPs;
340
341	if (padlist)
342	{
343	put_padlist (cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
344	CvPADLIST(cv) = padlist;	378	CvDEPTH (cv) = PTR2IV (POPs);
345	#ifdef USE_THREADS	379	CvPADLIST (cv) = (AV *)POPs;
346	/CvOWNER(cv) = (struct perl_thread )POPs;*/
347	#endif
348	}
349
350	++CvDEPTH(cv);
351	}	380	}
352		381
353	PUTBACK;	382	PUTBACK;
354	}	383	}
355	}	384	}
356		385
357	static void	386	static void
358	save_state(pTHX_ Coro__State c, int flags)	387	save_perl (pTHX_ Coro__State c)
359	{	388	{
360	{	389	{
361	dSP;	390	dSP;
362	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
363	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
366	/*	395	/*
367	* the worst thing you can imagine happens first - we have to save	396	* the worst thing you can imagine happens first - we have to save
368	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
369	*/	398	*/
370		399
371	PUSHs (Nullsv);	400	XPUSHs (Nullsv);
372	/* this loop was inspired by pp_caller */	401	/* this loop was inspired by pp_caller */
373	for (;;)	402	for (;;)
374	{	403	{
375	do	404	while (cxix >= 0)
376	{	405	{
377	PERL_CONTEXT *cx = &ccstk[cxix--];	406	PERL_CONTEXT *cx = &ccstk[cxix--];
378		407
379	if (CxTYPE(cx) == CXt_SUB)	408	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
380	{	409	{
381	CV *cv = cx->blk_sub.cv;	410	CV *cv = cx->blk_sub.cv;
		411
382	if (CvDEPTH(cv))	412	if (CvDEPTH (cv))
383	{	413	{
384	#ifdef USE_THREADS
385	/XPUSHs ((SV )CvOWNER(cv));*/
386	/CvOWNER(cv) = 0;/
387	/error must unlock this cv etc.. etc.../
388	#endif
389	EXTEND (SP, CvDEPTH(cv)*2);	414	EXTEND (SP, 3);
390
391	while (--CvDEPTH(cv))
392	{
393	/* this tells the restore code to increment CvDEPTH */
394	PUSHs (Nullsv);
395	PUSHs ((SV *)cv);
396	}
397
398	PUSHs ((SV *)CvPADLIST(cv));	415	PUSHs ((SV *)CvPADLIST (cv));
		416	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
399	PUSHs ((SV *)cv);	417	PUSHs ((SV *)cv);
400		418
401	get_padlist (cv); /* this is a monster */	419	CvDEPTH (cv) = 0;
		420	get_padlist (aTHX_ cv);
402	}	421	}
403	}	422	}
404	else if (CxTYPE(cx) == CXt_FORMAT)
405	{
406	/* I never used formats, so how should I know how these are implemented? */
407	/* my bold guess is as a simple, plain sub... */
408	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
409	}
410	}	423	}
411	while (cxix >= 0);
412		424
413	if (top_si->si_type == PERLSI_MAIN)	425	if (top_si->si_type == PERLSI_MAIN)
414	break;	426	break;
415		427
416	top_si = top_si->si_prev;	428	top_si = top_si->si_prev;
…		…
419	}	431	}
420		432
421	PUTBACK;	433	PUTBACK;
422	}	434	}
423		435
424	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	436	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
425	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	437	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
426	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	438	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		439	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		440	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
427		441
428	/* I have not the slightest idea of why av_reify is necessary */	442	#define VAR(name,type)c->name = PL_ ## name;
429	/* but if it's missing the defav contents magically get replaced sometimes */	443	# include "state.h"
430	if (c->defav)	444	#undef VAR
431	av_reify (c->defav);
432
433	c->dowarn = PL_dowarn;
434	c->in_eval = PL_in_eval;
435
436	c->curstackinfo = PL_curstackinfo;
437	c->curstack = PL_curstack;
438	c->mainstack = PL_mainstack;
439	c->stack_sp = PL_stack_sp;
440	c->op = PL_op;
441	c->curpad = PL_curpad;
442	c->stack_base = PL_stack_base;
443	c->stack_max = PL_stack_max;
444	c->tmps_stack = PL_tmps_stack;
445	c->tmps_floor = PL_tmps_floor;
446	c->tmps_ix = PL_tmps_ix;
447	c->tmps_max = PL_tmps_max;
448	c->markstack = PL_markstack;
449	c->markstack_ptr = PL_markstack_ptr;
450	c->markstack_max = PL_markstack_max;
451	c->scopestack = PL_scopestack;
452	c->scopestack_ix = PL_scopestack_ix;
453	c->scopestack_max = PL_scopestack_max;
454	c->savestack = PL_savestack;
455	c->savestack_ix = PL_savestack_ix;
456	c->savestack_max = PL_savestack_max;
457	c->retstack = PL_retstack;
458	c->retstack_ix = PL_retstack_ix;
459	c->retstack_max = PL_retstack_max;
460	c->curcop = PL_curcop;
461	c->top_env = PL_top_env;
462	}	445	}
463		446
464	/*	447	/*
465	* allocate various perl stacks. This is an exact copy	448	* allocate various perl stacks. This is an exact copy
466	* of perl.c:init_stacks, except that it uses less memory	449	* of perl.c:init_stacks, except that it uses less memory
467	* on the assumption that coroutines do not usually need	450	* on the (sometimes correct) assumption that coroutines do
468	* a lot of stackspace.	451	* not usually need a lot of stackspace.
469	*/	452	*/
470	STATIC void	453	#if CORO_PREFER_PERL_FUNCTIONS
		454	# define coro_init_stacks init_stacks
		455	#else
		456	static void
471	coro_init_stacks (pTHX)	457	coro_init_stacks (pTHX)
472	{	458	{
473	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	459	PL_curstackinfo = new_stackinfo(64, 6);
474	PL_curstackinfo->si_type = PERLSI_MAIN;	460	PL_curstackinfo->si_type = PERLSI_MAIN;
475	PL_curstack = PL_curstackinfo->si_stack;	461	PL_curstack = PL_curstackinfo->si_stack;
476	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	462	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
477		463
478	PL_stack_base = AvARRAY(PL_curstack);	464	PL_stack_base = AvARRAY(PL_curstack);
479	PL_stack_sp = PL_stack_base;	465	PL_stack_sp = PL_stack_base;
480	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	466	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
481		467
482	New(50,PL_tmps_stack,96,SV*);	468	New(50,PL_tmps_stack,64,SV*);
483	PL_tmps_floor = -1;	469	PL_tmps_floor = -1;
484	PL_tmps_ix = -1;	470	PL_tmps_ix = -1;
485	PL_tmps_max = 96;	471	PL_tmps_max = 64;
486		472
487	New(54,PL_markstack,16,I32);	473	New(54,PL_markstack,16,I32);
488	PL_markstack_ptr = PL_markstack;	474	PL_markstack_ptr = PL_markstack;
489	PL_markstack_max = PL_markstack + 16;	475	PL_markstack_max = PL_markstack + 16;
490		476
		477	#ifdef SET_MARK_OFFSET
491	SET_MARK_OFFSET;	478	SET_MARK_OFFSET;
		479	#endif
492		480
493	New(54,PL_scopestack,16,I32);	481	New(54,PL_scopestack,16,I32);
494	PL_scopestack_ix = 0;	482	PL_scopestack_ix = 0;
495	PL_scopestack_max = 16;	483	PL_scopestack_max = 16;
496		484
497	New(54,PL_savestack,96,ANY);	485	New(54,PL_savestack,64,ANY);
498	PL_savestack_ix = 0;	486	PL_savestack_ix = 0;
499	PL_savestack_max = 96;	487	PL_savestack_max = 64;
500		488
		489	#if !PERL_VERSION_ATLEAST (5,9,0)
501	New(54,PL_retstack,8,OP*);	490	New(54,PL_retstack,4,OP*);
502	PL_retstack_ix = 0;	491	PL_retstack_ix = 0;
503	PL_retstack_max = 8;	492	PL_retstack_max = 4;
		493	#endif
504	}	494	}
		495	#endif
505		496
506	/*	497	/*
507	* destroy the stacks, the callchain etc...	498	* destroy the stacks, the callchain etc...
508	* still there is a memleak of 128 bytes...
509	*/	499	*/
510	STATIC void	500	static void
511	destroy_stacks(pTHX)	501	coro_destroy_stacks (pTHX)
512	{	502	{
513	/* is this ugly, I ask? */	503	if (!IN_DESTRUCT)
514	while (PL_scopestack_ix)	504	{
515	LEAVE;	505	/* restore all saved variables and stuff */
		506	LEAVE_SCOPE (0);
		507	assert (PL_tmps_floor == -1);
516		508
517	/* sure it is, but more important: is it correct?? :/ */	509	/* free all temporaries */
518	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
519	FREETMPS;	510	FREETMPS;
		511	assert (PL_tmps_ix == -1);
		512
		513	/* unwind all extra stacks */
		514	POPSTACK_TO (PL_mainstack);
		515
		516	/* unwind main stack */
		517	dounwind (-1);
		518	}
520		519
521	while (PL_curstackinfo->si_next)	520	while (PL_curstackinfo->si_next)
522	PL_curstackinfo = PL_curstackinfo->si_next;	521	PL_curstackinfo = PL_curstackinfo->si_next;
523		522
524	while (PL_curstackinfo)	523	while (PL_curstackinfo)
525	{	524	{
526	PERL_SI *p = PL_curstackinfo->si_prev;	525	PERL_SI *p = PL_curstackinfo->si_prev;
527		526
528	{	527	if (!IN_DESTRUCT)
529	dSP;
530	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
531	PUTBACK; /* possibly superfluous */
532	}
533
534	dounwind(-1);
535
536	SvREFCNT_dec(PL_curstackinfo->si_stack);	528	SvREFCNT_dec (PL_curstackinfo->si_stack);
		529
537	Safefree(PL_curstackinfo->si_cxstack);	530	Safefree (PL_curstackinfo->si_cxstack);
538	Safefree(PL_curstackinfo);	531	Safefree (PL_curstackinfo);
539	PL_curstackinfo = p;	532	PL_curstackinfo = p;
540	}	533	}
541		534
542	Safefree(PL_tmps_stack);	535	Safefree (PL_tmps_stack);
543	Safefree(PL_markstack);	536	Safefree (PL_markstack);
544	Safefree(PL_scopestack);	537	Safefree (PL_scopestack);
545	Safefree(PL_savestack);	538	Safefree (PL_savestack);
		539	#if !PERL_VERSION_ATLEAST (5,9,0)
546	Safefree(PL_retstack);	540	Safefree (PL_retstack);
547	}
548
549	static void
550	allocate_stack (Coro__State ctx, int alloc)
551	{
552	coro_stack *stack;
553
554	New (0, stack, 1, coro_stack);
555
556	stack->refcnt = 1;
557	stack->usecnt = 1;
558	stack->gencnt = ctx->gencnt = 0;
559	if (alloc)
560	{
561	#ifdef HAVE_MMAP
562	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
563	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);
564	if (stack->sptr == (void *)-1)
565	#endif	541	#endif
		542	}
		543
		544	static size_t
		545	coro_rss (struct coro *coro)
		546	{
		547	size_t rss = sizeof (coro);
		548
		549	if (coro->mainstack)
		550	{
		551	if (coro->flags & CF_RUNNING)
566	{	552	{
567	/FIXME//D//* reasonable stack size! */	553	#define VAR(name,type)coro->name = PL_ ## name;
568	stack->ssize = -4096 * sizeof (long);	554	# include "state.h"
569	New (0, stack->sptr, 4096, long);	555	#undef VAR
570	}	556	}
571	}
572	else
573	stack->sptr = 0;
574		557
575	ctx->stack = stack;	558	rss += sizeof (coro->curstackinfo);
576	}	559	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		560	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		561	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		562	rss += coro->tmps_max * sizeof (SV *);
		563	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		564	rss += coro->scopestack_max * sizeof (I32);
		565	rss += coro->savestack_max * sizeof (ANY);
577		566
578	static void	567	#if !PERL_VERSION_ATLEAST (5,9,0)
579	deallocate_stack (Coro__State ctx)	568	rss += coro->retstack_max * sizeof (OP *);
580	{	569	#endif
581	coro_stack *stack = ctx->stack;
582
583	ctx->stack = 0;
584
585	if (stack)
586	{	570	}
587	if (!--stack->refcnt)
588	{
589	#ifdef HAVE_MMAP
590	if (stack->ssize > 0 && stack->sptr)
591	munmap (stack->sptr, stack->ssize);
592	else
593	#else
594	Safefree (stack->sptr);
595	#endif
596	Safefree (stack);
597	}
598	else if (ctx->gencnt == stack->gencnt)
599	--stack->usecnt;
600	}
601	}
602		571
		572	return rss;
		573	}
		574
		575	/ coroutine stack handling **********************************************/
		576
603	static void	577	static void
604	setup_coro (void *arg)	578	setup_coro (pTHX_ struct coro *coro)
605	{	579	{
606	/*	580	/*
607	* emulate part of the perl startup here.	581	* emulate part of the perl startup here.
608	*/	582	*/
		583	coro_init_stacks (aTHX);
		584
		585	PL_curcop = &PL_compiling;
		586	PL_in_eval = EVAL_NULL;
		587	PL_comppad = 0;
		588	PL_curpm = 0;
		589	PL_localizing = 0;
		590	PL_dirty = 0;
		591	PL_restartop = 0;
		592
		593	{
		594	dSP;
		595	LOGOP myop;
		596
		597	SvREFCNT_dec (GvAV (PL_defgv));
		598	GvAV (PL_defgv) = coro->args; coro->args = 0;
		599
		600	Zero (&myop, 1, LOGOP);
		601	myop.op_next = Nullop;
		602	myop.op_flags = OPf_WANT_VOID;
		603
		604	PUSHMARK (SP);
		605	XPUSHs (av_shift (GvAV (PL_defgv)));
		606	PUTBACK;
		607	PL_op = (OP *)&myop;
		608	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		609	SPAGAIN;
		610	}
		611
		612	ENTER; /* necessary e.g. for dounwind */
		613	}
		614
		615	static void
		616	free_coro_mortal (pTHX)
		617	{
		618	if (coro_mortal)
		619	{
		620	SvREFCNT_dec (coro_mortal);
		621	coro_mortal = 0;
		622	}
		623	}
		624
		625	/* inject a fake call to Coro::State::_cctx_init into the execution */
		626	/* _cctx_init should be careful, as it could be called at almost any time */
		627	/* during execution of a perl program */
		628	static void NOINLINE
		629	prepare_cctx (pTHX_ coro_cctx *cctx)
		630	{
609	dSP;	631	dSP;
610	Coro__State ctx = (Coro__State)arg;	632	LOGOP myop;
611	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
612		633
613	coro_init_stacks (aTHX);	634	Zero (&myop, 1, LOGOP);
614	/PL_curcop = 0;/	635	myop.op_next = PL_op;
615	/PL_in_eval = PL_in_eval;/ /* inherit */	636	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
616	SvREFCNT_dec (GvAV (PL_defgv));
617	GvAV (PL_defgv) = ctx->args;
618		637
		638	PUSHMARK (SP);
		639	EXTEND (SP, 2);
		640	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		641	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		642	PUTBACK;
		643	PL_op = (OP *)&myop;
		644	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
619	SPAGAIN;	645	SPAGAIN;
		646	}
620		647
621	if (ctx->stack)	648	/*
622	{	649	* this is a _very_ stripped down perl interpreter ;)
623	ctx->cursp = 0;	650	*/
		651	static void
		652	coro_run (void *arg)
		653	{
		654	dTHX;
624		655
625	PUSHMARK(SP);	656	/* coro_run is the alternative tail of transfer(), so unlock here. */
626	PUTBACK;	657	UNLOCK;
627	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
628		658
629	if (SvTRUE (ERRSV))	659	PL_top_env = &PL_start_env;
630	croak (NULL);	660
631	else	661	/* inject a fake subroutine call to cctx_init */
632	croak ("FATAL: CCTXT coroutine returned!");	662	prepare_cctx (aTHX_ (coro_cctx *)arg);
		663
		664	/* somebody or something will hit me for both perl_run and PL_restartop */
		665	PL_restartop = PL_op;
		666	perl_run (PL_curinterp);
		667
		668	/*
		669	* If perl-run returns we assume exit() was being called or the coro
		670	* fell off the end, which seems to be the only valid (non-bug)
		671	* reason for perl_run to return. We try to exit by jumping to the
		672	* bootstrap-time "top" top_env, as we cannot restore the "main"
		673	* coroutine as Coro has no such concept
		674	*/
		675	PL_top_env = main_top_env;
		676	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		677	}
		678
		679	static coro_cctx *
		680	cctx_new ()
		681	{
		682	coro_cctx *cctx;
		683	void *stack_start;
		684	size_t stack_size;
		685
		686	++cctx_count;
		687
		688	Newz (0, cctx, 1, coro_cctx);
		689
		690	#if HAVE_MMAP
		691
		692	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		693	/* mmap supposedly does allocate-on-write for us */
		694	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		695
		696	if (cctx->sptr != (void *)-1)
		697	{
		698	# if CORO_STACKGUARD
		699	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		700	# endif
		701	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		702	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		703	cctx->mapped = 1;
633	}	704	}
634	else	705	else
635	{	706	#endif
636	UNOP myop;
637
638	PL_op = (OP *)&myop;
639
640	Zero(&myop, 1, UNOP);
641	myop.op_next = Nullop;
642	myop.op_flags = OPf_WANT_VOID;
643
644	PUSHMARK(SP);
645	XPUSHs (sub_init);
646	/*
647	* the next line is slightly wrong, as PL_op->op_next
648	* is actually being executed so we skip the first op.
649	* that doesn't matter, though, since it is only
650	* pp_nextstate and we never return...
651	* ah yes, and I don't care anyways ;)
652	*/
653	PUTBACK;
654	PL_op = pp_entersub();
655	SPAGAIN;
656
657	ENTER; /* necessary e.g. for dounwind */
658	}	707	{
659	}	708	cctx->ssize = coro_stacksize * (long)sizeof (long);
		709	New (0, cctx->sptr, coro_stacksize, long);
660		710
661	static void	711	if (!cctx->sptr)
662	continue_coro (void *arg)	712	{
663	{	713	perror ("FATAL: unable to allocate stack for coroutine");
664	/*	714	_exit (EXIT_FAILURE);
665	* this is a _very_ stripped down perl interpreter ;)	715	}
666	*/
667	Coro__State ctx = (Coro__State)arg;
668		716
669	/FIXME//* must set up top_env here */	717	stack_start = cctx->sptr;
670	ctx->cursp = 0;	718	stack_size = cctx->ssize;
		719	}
		720
		721	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		722	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		723
		724	return cctx;
		725	}
		726
		727	static void
		728	cctx_destroy (coro_cctx *cctx)
		729	{
		730	if (!cctx)
		731	return;
		732
		733	--cctx_count;
		734
		735	#if CORO_USE_VALGRIND
		736	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		737	#endif
		738
		739	#if HAVE_MMAP
		740	if (cctx->mapped)
		741	munmap (cctx->sptr, cctx->ssize);
		742	else
		743	#endif
		744	Safefree (cctx->sptr);
		745
		746	Safefree (cctx);
		747	}
		748
		749	static coro_cctx *
		750	cctx_get (pTHX)
		751	{
		752	while (cctx_first)
		753	{
		754	coro_cctx *cctx = cctx_first;
		755	cctx_first = cctx->next;
		756	--cctx_idle;
		757
		758	if (cctx->ssize >= coro_stacksize)
		759	return cctx;
		760
		761	cctx_destroy (cctx);
		762	}
		763
671	PL_op = PL_op->op_next;	764	PL_op = PL_op->op_next;
672	CALLRUNOPS(aTHX);	765	return cctx_new ();
673
674	abort ();
675	}	766	}
676		767
677	STATIC void	768	static void
		769	cctx_put (coro_cctx *cctx)
		770	{
		771	/* free another cctx if overlimit */
		772	if (cctx_idle >= MAX_IDLE_CCTX)
		773	{
		774	coro_cctx *first = cctx_first;
		775	cctx_first = first->next;
		776	--cctx_idle;
		777
		778	assert (!first->inuse);
		779	cctx_destroy (first);
		780	}
		781
		782	++cctx_idle;
		783	cctx->next = cctx_first;
		784	cctx_first = cctx;
		785	}
		786
		787	/ coroutine switching ***************************************************/
		788
		789	/* never call directly, always through the coro_state_transfer global variable */
		790	static void NOINLINE
678	transfer(pTHX_ struct coro prev, struct coro next, int flags)	791	transfer (pTHX_ struct coro prev, struct coro next)
679	{	792	{
680	dSP;
681	dSTACKLEVEL;	793	dSTACKLEVEL;
682		794
		795	/* sometimes transfer is only called to set idle_sp */
		796	if (!next)
		797	{
		798	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		799	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		800	}
683	if (prev != next)	801	else if (prev != next)
684	{	802	{
685	if (next->mainstack)	803	coro_cctx *prev__cctx;
		804
		805	if (prev->flags & CF_NEW)
686	{	806	{
687	SAVE (prev, flags);	807	/* create a new empty context */
688	LOAD (next);	808	Newz (0, prev->cctx, 1, coro_cctx);
689		809	prev->cctx->inuse = 1;
690	/* mark this state as in-use */	810	prev->flags &= ~CF_NEW;
691	next->mainstack = 0;	811	prev->flags \|= CF_RUNNING;
692	next->tmps_ix = -2;
693
694	/* stacklevel changed? if yes, grab the stack for us! */
695	if (flags & TRANSFER_SAVE_CCTXT)
696	{
697	if (!prev->stack)
698	allocate_stack (prev, 0);
699	else if (prev->cursp != stacklevel
700	&& prev->stack->usecnt > 1)
701	{
702	prev->gencnt = ++prev->stack->gencnt;
703	prev->stack->usecnt = 1;
704	}
705
706	/* has our stack been invalidated? */
707	if (next->stack && next->stack->gencnt != next->gencnt)
708	{
709	deallocate_stack (next);
710	allocate_stack (next, 1);
711	coro_create (&(next->stack->cctx),
712	continue_coro, (void *)next,
713	next->stack->sptr, labs (next->stack->ssize));
714	}
715
716	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
717	}
718
719	}	812	}
720	else if (next->tmps_ix == -2)	813
721	croak ("tried to transfer to running coroutine");	814	/TODO: must not croak here /
		815	if (!prev->flags & CF_RUNNING)
		816	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		817
		818	if (next->flags & CF_RUNNING)
		819	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		820
		821	if (next->flags & CF_DESTROYED)
		822	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		823
		824	prev->flags &= ~CF_RUNNING;
		825	next->flags \|= CF_RUNNING;
		826
		827	LOCK;
		828
		829	if (next->flags & CF_NEW)
		830	{
		831	/* need to start coroutine */
		832	next->flags &= ~CF_NEW;
		833	/* first get rid of the old state */
		834	save_perl (aTHX_ prev);
		835	/* setup coroutine call */
		836	setup_coro (aTHX_ next);
		837	/* need a new stack */
		838	assert (!next->cctx);
		839	}
722	else	840	else
723	{	841	{
724	SAVE (prev, -1); /* first get rid of the old state */	842	/* coroutine already started */
725		843	save_perl (aTHX_ prev);
726	if (flags & TRANSFER_SAVE_CCTXT)	844	load_perl (aTHX_ next);
727	{
728	if (!prev->stack)
729	allocate_stack (prev, 0);
730
731	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
732	{
733	setup_coro (next);
734
735	prev->stack->refcnt++;
736	prev->stack->usecnt++;
737	next->stack = prev->stack;
738	next->gencnt = prev->gencnt;
739	}
740	else
741	{
742	allocate_stack (next, 1);
743	coro_create (&(next->stack->cctx),
744	setup_coro, (void *)next,
745	next->stack->sptr, labs (next->stack->ssize));
746	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
747	}
748	}
749	else
750	setup_coro (next);
751	}	845	}
		846
		847	prev__cctx = prev->cctx;
		848
		849	/* possibly "free" the cctx */
		850	if (prev__cctx->idle_sp == STACKLEVEL)
		851	{
		852	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		853	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		854
		855	prev->cctx = 0;
		856
		857	cctx_put (prev__cctx);
		858	prev__cctx->inuse = 0;
		859	}
		860
		861	if (!next->cctx)
		862	{
		863	next->cctx = cctx_get (aTHX);
		864	assert (!next->cctx->inuse);
		865	next->cctx->inuse = 1;
		866	}
		867
		868	if (prev__cctx != next->cctx)
		869	{
		870	prev__cctx->top_env = PL_top_env;
		871	PL_top_env = next->cctx->top_env;
		872	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		873	}
		874
		875	free_coro_mortal (aTHX);
		876	UNLOCK;
		877	}
		878	}
		879
		880	struct transfer_args
		881	{
		882	struct coro prev, next;
		883	};
		884
		885	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		886
		887	/ high level stuff ******************************************************/
		888
		889	static int
		890	coro_state_destroy (pTHX_ struct coro *coro)
		891	{
		892	if (coro->flags & CF_DESTROYED)
		893	return 0;
		894
		895	coro->flags \|= CF_DESTROYED;
		896
		897	if (coro->flags & CF_READY)
752	}	898	{
		899	/* reduce nready, as destroying a ready coro effectively unreadies it */
		900	/* alternative: look through all ready queues and remove the coro */
		901	LOCK;
		902	--coro_nready;
		903	UNLOCK;
		904	}
		905	else
		906	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
753		907
754	next->cursp = stacklevel;	908	if (coro->mainstack && coro->mainstack != main_mainstack)
		909	{
		910	struct coro temp;
		911
		912	assert (!(coro->flags & CF_RUNNING));
		913
		914	Zero (&temp, 1, struct coro);
		915	temp.save = CORO_SAVE_ALL;
		916
		917	if (coro->flags & CF_RUNNING)
		918	croak ("FATAL: tried to destroy currently running coroutine");
		919
		920	save_perl (aTHX_ &temp);
		921	load_perl (aTHX_ coro);
		922
		923	coro_destroy_stacks (aTHX);
		924
		925	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		926
		927	coro->mainstack = 0;
		928	}
		929
		930	cctx_destroy (coro->cctx);
		931	SvREFCNT_dec (coro->args);
		932
		933	if (coro->next) coro->next->prev = coro->prev;
		934	if (coro->prev) coro->prev->next = coro->next;
		935	if (coro == coro_first) coro_first = coro->next;
		936
		937	return 1;
755	}	938	}
		939
		940	static int
		941	coro_state_free (pTHX_ SV sv, MAGIC mg)
		942	{
		943	struct coro coro = (struct coro )mg->mg_ptr;
		944	mg->mg_ptr = 0;
		945
		946	coro->hv = 0;
		947
		948	if (--coro->refcnt < 0)
		949	{
		950	coro_state_destroy (aTHX_ coro);
		951	Safefree (coro);
		952	}
		953
		954	return 0;
		955	}
		956
		957	static int
		958	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		959	{
		960	struct coro coro = (struct coro )mg->mg_ptr;
		961
		962	++coro->refcnt;
		963
		964	return 0;
		965	}
		966
		967	static MGVTBL coro_state_vtbl = {
		968	0, 0, 0, 0,
		969	coro_state_free,
		970	0,
		971	#ifdef MGf_DUP
		972	coro_state_dup,
		973	#else
		974	# define MGf_DUP 0
		975	#endif
		976	};
756		977
757	static struct coro *	978	static struct coro *
758	sv_to_coro (SV arg, const char funcname, const char *varname)	979	SvSTATE_ (pTHX_ SV *coro)
759	{	980	{
760	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	981	HV *stash;
		982	MAGIC *mg;
		983
		984	if (SvROK (coro))
		985	coro = SvRV (coro);
		986
		987	stash = SvSTASH (coro);
		988	if (stash != coro_stash && stash != coro_state_stash)
761	{	989	{
762	HE he = hv_fetch_ent((HV )SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);	990	/* very slow, but rare, check */
763		991	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
764	if (!he)	992	croak ("Coro::State object required");
765	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);
766
767	arg = HeVAL(he);
768	}	993	}
		994
		995	mg = CORO_MAGIC (coro);
		996	return (struct coro *)mg->mg_ptr;
		997	}
		998
		999	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1000
		1001	static void
		1002	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1003	{
		1004	ta->prev = SvSTATE (prev_sv);
		1005	ta->next = SvSTATE (next_sv);
		1006	}
		1007
		1008	static void
		1009	api_transfer (SV prev_sv, SV next_sv)
		1010	{
		1011	dTHX;
		1012	struct transfer_args ta;
		1013
		1014	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1015	TRANSFER (ta);
		1016	}
		1017
		1018	static int
		1019	api_save (SV *coro_sv, int new_save)
		1020	{
		1021	dTHX;
		1022	struct coro *coro = SvSTATE (coro_sv);
		1023	int old_save = coro->save;
		1024
		1025	if (new_save >= 0)
		1026	coro->save = new_save;
		1027
		1028	return old_save;
		1029	}
		1030
		1031	/ Coro ******************************************************************/
		1032
		1033	static void
		1034	coro_enq (pTHX_ SV *coro_sv)
		1035	{
		1036	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1037	}
		1038
		1039	static SV *
		1040	coro_deq (pTHX_ int min_prio)
		1041	{
		1042	int prio = PRIO_MAX - PRIO_MIN;
		1043
		1044	min_prio -= PRIO_MIN;
		1045	if (min_prio < 0)
		1046	min_prio = 0;
		1047
		1048	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
		1049	if (AvFILLp (coro_ready [prio]) >= 0)
		1050	return av_shift (coro_ready [prio]);
		1051
		1052	return 0;
		1053	}
		1054
		1055	static int
		1056	api_ready (SV *coro_sv)
		1057	{
		1058	dTHX;
		1059	struct coro *coro;
		1060
		1061	if (SvROK (coro_sv))
		1062	coro_sv = SvRV (coro_sv);
		1063
		1064	coro = SvSTATE (coro_sv);
		1065
		1066	if (coro->flags & CF_READY)
		1067	return 0;
		1068
		1069	coro->flags \|= CF_READY;
		1070
		1071	LOCK;
		1072	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1073	++coro_nready;
		1074	UNLOCK;
		1075
		1076	return 1;
		1077	}
		1078
		1079	static int
		1080	api_is_ready (SV *coro_sv)
		1081	{
		1082	dTHX;
		1083	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1084	}
		1085
		1086	static void
		1087	prepare_schedule (pTHX_ struct transfer_args *ta)
		1088	{
		1089	SV prev_sv, next_sv;
		1090
		1091	for (;;)
		1092	{
		1093	LOCK;
		1094	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1095
		1096	/* nothing to schedule: call the idle handler */
		1097	if (!next_sv)
769		1098	{
770	/* must also be changed inside Coro::Cont::yield */	1099	dSP;
771	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)	1100	UNLOCK;
772	return (struct coro ) SvIV((SV)SvRV(arg));	1101
		1102	ENTER;
		1103	SAVETMPS;
		1104
		1105	PUSHMARK (SP);
		1106	PUTBACK;
		1107	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1108
		1109	FREETMPS;
		1110	LEAVE;
		1111	continue;
		1112	}
		1113
		1114	ta->next = SvSTATE (next_sv);
		1115
		1116	/* cannot transfer to destroyed coros, skip and look for next */
		1117	if (ta->next->flags & CF_DESTROYED)
		1118	{
		1119	UNLOCK;
		1120	SvREFCNT_dec (next_sv);
		1121	/* coro_nready is already taken care of by destroy */
		1122	continue;
		1123	}
		1124
		1125	--coro_nready;
		1126	UNLOCK;
		1127	break;
		1128	}
		1129
		1130	/* free this only after the transfer */
		1131	prev_sv = SvRV (coro_current);
		1132	SvRV_set (coro_current, next_sv);
		1133	ta->prev = SvSTATE (prev_sv);
		1134
		1135	assert (ta->next->flags & CF_READY);
		1136	ta->next->flags &= ~CF_READY;
		1137
		1138	LOCK;
		1139	free_coro_mortal (aTHX);
		1140	coro_mortal = prev_sv;
		1141	UNLOCK;
		1142	}
		1143
		1144	static void
		1145	prepare_cede (pTHX_ struct transfer_args *ta)
		1146	{
		1147	api_ready (coro_current);
		1148	prepare_schedule (aTHX_ ta);
		1149	}
		1150
		1151	static int
		1152	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1153	{
		1154	if (coro_nready)
		1155	{
		1156	SV *prev = SvRV (coro_current);
		1157	prepare_schedule (aTHX_ ta);
		1158	api_ready (prev);
		1159	return 1;
		1160	}
773	else	1161	else
774	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	1162	return 0;
		1163	}
		1164
		1165	static void
		1166	api_schedule (void)
		1167	{
		1168	dTHX;
		1169	struct transfer_args ta;
		1170
		1171	prepare_schedule (aTHX_ &ta);
		1172	TRANSFER (ta);
		1173	}
		1174
		1175	static int
		1176	api_cede (void)
		1177	{
		1178	dTHX;
		1179	struct transfer_args ta;
		1180
		1181	prepare_cede (aTHX_ &ta);
		1182
		1183	if (ta.prev != ta.next)
		1184	{
		1185	TRANSFER (ta);
		1186	return 1;
		1187	}
		1188	else
		1189	return 0;
		1190	}
		1191
		1192	static int
		1193	api_cede_notself (void)
		1194	{
		1195	dTHX;
		1196	struct transfer_args ta;
		1197
		1198	if (prepare_cede_notself (aTHX_ &ta))
		1199	{
		1200	TRANSFER (ta);
		1201	return 1;
		1202	}
		1203	else
		1204	return 0;
775	}	1205	}
776		1206
777	MODULE = Coro::State PACKAGE = Coro::State	1207	MODULE = Coro::State PACKAGE = Coro::State
778		1208
779	PROTOTYPES: ENABLE	1209	PROTOTYPES: DISABLE
780		1210
781	BOOT:	1211	BOOT:
782	{ /* {} necessary for stoopid perl-5.6.x */	1212	{
783	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1213	#ifdef USE_ITHREADS
784	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1214	MUTEX_INIT (&coro_mutex);
		1215	#endif
		1216	BOOT_PAGESIZE;
		1217
785	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1218	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
786		1219
787	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1220	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
788	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1221	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
789	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1222	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1223	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1224	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
790	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1225	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
791		1226	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
792	if (!padlist_cache)
793	padlist_cache = newHV ();
794		1227
795	main_mainstack = PL_mainstack;	1228	main_mainstack = PL_mainstack;
796	}	1229	main_top_env = PL_top_env;
797		1230
798	Coro::State	1231	while (main_top_env->je_prev)
799	_newprocess(args)	1232	main_top_env = main_top_env->je_prev;
800	SV * args	1233
801	PROTOTYPE: $	1234	coroapi.ver = CORO_API_VERSION;
		1235	coroapi.transfer = api_transfer;
		1236
		1237	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
		1238	}
		1239
		1240	SV *
		1241	new (char *klass, ...)
802	CODE:	1242	CODE:
803	Coro__State coro;	1243	{
		1244	struct coro *coro;
		1245	HV *hv;
		1246	int i;
804		1247
805	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
806	croak ("Coro::State::_newprocess expects an arrayref");
807
808	New (0, coro, 1, struct coro);	1248	Newz (0, coro, 1, struct coro);
		1249	coro->args = newAV ();
		1250	coro->save = CORO_SAVE_DEF;
		1251	coro->flags = CF_NEW;
809		1252
810	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1253	if (coro_first) coro_first->prev = coro;
811	coro->mainstack = 0; /* actual work is done inside transfer */	1254	coro->next = coro_first;
812	coro->stack = 0;	1255	coro_first = coro;
813		1256
814	RETVAL = coro;	1257	coro->hv = hv = newHV ();
		1258	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1259	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1260
		1261	for (i = 1; i < items; i++)
		1262	av_push (coro->args, newSVsv (ST (i)));
		1263	}
815	OUTPUT:	1264	OUTPUT:
816	RETVAL	1265	RETVAL
817		1266
		1267	int
		1268	save (SV *coro, int new_save = -1)
		1269	CODE:
		1270	RETVAL = api_save (coro, new_save);
		1271	OUTPUT:
		1272	RETVAL
		1273
		1274	int
		1275	save_also (SV *coro_sv, int save_also)
		1276	CODE:
		1277	{
		1278	struct coro *coro = SvSTATE (coro_sv);
		1279	RETVAL = coro->save;
		1280	coro->save \|= save_also;
		1281	}
		1282	OUTPUT:
		1283	RETVAL
		1284
818	void	1285	void
819	transfer(prev, next, flags)	1286	_set_stacklevel (...)
820	Coro::State_or_hashref prev	1287	ALIAS:
821	Coro::State_or_hashref next	1288	Coro::State::transfer = 1
822	int flags	1289	Coro::schedule = 2
823	PROTOTYPE: @	1290	Coro::cede = 3
		1291	Coro::cede_notself = 4
824	CODE:	1292	CODE:
825	PUTBACK;	1293	{
826	transfer (aTHX_ prev, next, flags);	1294	struct transfer_args ta;
827	SPAGAIN;	1295
		1296	switch (ix)
		1297	{
		1298	case 0:
		1299	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1300	ta.next = 0;
		1301	break;
		1302
		1303	case 1:
		1304	if (items != 2)
		1305	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1306
		1307	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1308	break;
		1309
		1310	case 2:
		1311	prepare_schedule (aTHX_ &ta);
		1312	break;
		1313
		1314	case 3:
		1315	prepare_cede (aTHX_ &ta);
		1316	break;
		1317
		1318	case 4:
		1319	if (!prepare_cede_notself (aTHX_ &ta))
		1320	XSRETURN_EMPTY;
		1321
		1322	break;
		1323	}
		1324
		1325	BARRIER;
		1326	TRANSFER (ta);
		1327
		1328	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1329	XSRETURN_YES;
		1330	}
		1331
		1332	bool
		1333	_destroy (SV *coro_sv)
		1334	CODE:
		1335	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1336	OUTPUT:
		1337	RETVAL
828		1338
829	void	1339	void
830	DESTROY(coro)
831	Coro::State coro
832	CODE:
833
834	if (coro->mainstack && coro->mainstack != main_mainstack)
835	{
836	struct coro temp;
837
838	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
839	LOAD(aTHX_ coro);
840
841	destroy_stacks (aTHX);
842
843	LOAD((&temp)); /* this will get rid of defsv etc.. */
844
845	coro->mainstack = 0;
846	}
847
848	deallocate_stack (coro);
849
850	Safefree (coro);
851
852	void
853	flush()
854	CODE:
855	#ifdef MAY_FLUSH
856	flush_padlist_cache ();
857	#endif
858
859	void
860	_exit(code)	1340	_exit (code)
861	int code	1341	int code
862	PROTOTYPE: $	1342	PROTOTYPE: $
863	CODE:	1343	CODE:
864	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
865	_exit (code);	1344	_exit (code);
866	#else
867	signal (SIGTERM, SIG_DFL);
868	raise (SIGTERM);
869	exit (code);
870	#endif
871		1345
872	MODULE = Coro::State PACKAGE = Coro::Cont	1346	int
		1347	cctx_stacksize (int new_stacksize = 0)
		1348	CODE:
		1349	RETVAL = coro_stacksize;
		1350	if (new_stacksize)
		1351	coro_stacksize = new_stacksize;
		1352	OUTPUT:
		1353	RETVAL
873		1354
874	# this is slightly dirty (should expose a c-level api)	1355	int
		1356	cctx_count ()
		1357	CODE:
		1358	RETVAL = cctx_count;
		1359	OUTPUT:
		1360	RETVAL
		1361
		1362	int
		1363	cctx_idle ()
		1364	CODE:
		1365	RETVAL = cctx_idle;
		1366	OUTPUT:
		1367	RETVAL
875		1368
876	void	1369	void
877	yield(...)	1370	list ()
878	PROTOTYPE: @	1371	PPCODE:
		1372	{
		1373	struct coro *coro;
		1374	for (coro = coro_first; coro; coro = coro->next)
		1375	if (coro->hv)
		1376	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1377	}
		1378
		1379	void
		1380	_eval (Coro::State coro, SV *coderef)
		1381	CODE:
		1382	{
		1383	if (coro->mainstack)
		1384	{
		1385	struct coro temp;
		1386	Zero (&temp, 1, struct coro);
		1387	temp.save = CORO_SAVE_ALL;
		1388
		1389	if (!(coro->flags & CF_RUNNING))
		1390	{
		1391	save_perl (aTHX_ &temp);
		1392	load_perl (aTHX_ coro);
		1393	}
		1394
		1395	{
		1396	dSP;
		1397	ENTER;
		1398	SAVETMPS;
		1399	PUSHMARK (SP);
		1400	PUTBACK;
		1401	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1402	SPAGAIN;
		1403	FREETMPS;
		1404	LEAVE;
		1405	PUTBACK;
		1406	}
		1407
		1408	if (!(coro->flags & CF_RUNNING))
		1409	{
		1410	save_perl (aTHX_ coro);
		1411	load_perl (aTHX_ &temp);
		1412	}
		1413	}
		1414	}
		1415
		1416	SV *
		1417	is_ready (Coro::State coro)
		1418	PROTOTYPE: $
		1419	ALIAS:
		1420	is_ready = CF_READY
		1421	is_running = CF_RUNNING
		1422	is_new = CF_NEW
		1423	is_destroyed = CF_DESTROYED
		1424	CODE:
		1425	RETVAL = boolSV (coro->flags & ix);
		1426	OUTPUT:
		1427	RETVAL
		1428
		1429	IV
		1430	rss (Coro::State coro)
		1431	PROTOTYPE: $
879	CODE:	1432	CODE:
880	static SV *returnstk;	1433	RETVAL = coro_rss (coro);
881	SV *sv;	1434	OUTPUT:
882	AV *defav = GvAV (PL_defgv);	1435	RETVAL
883	struct coro prev, next;
884		1436
885	if (!returnstk)
886	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
887
888	/* set up @_ -- ugly */
889	av_clear (defav);
890	av_fill (defav, items - 1);
891	while (items--)
892	av_store (defav, items, SvREFCNT_inc (ST(items)));
893
894	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
895	sv = av_pop ((AV *)SvRV (returnstk));
896	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
897	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
898	SvREFCNT_dec (sv);
899
900	transfer(aTHX_ prev, next, 0);
901		1437
902	MODULE = Coro::State PACKAGE = Coro	1438	MODULE = Coro::State PACKAGE = Coro
903		1439
904	# this is slightly dirty (should expose a c-level api)
905
906	BOOT:	1440	BOOT:
907	{	1441	{
		1442	int i;
		1443
		1444	coro_stash = gv_stashpv ("Coro", TRUE);
		1445
		1446	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
		1447	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
		1448	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
		1449	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
		1450	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
		1451	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
		1452
908	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1453	coro_current = get_sv ("Coro::current", FALSE);
		1454	SvREADONLY_on (coro_current);
		1455
		1456	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
909	coro_ready = newAV ();	1457	coro_ready[i] = newAV ();
910	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1458
		1459	{
		1460	SV *sv = perl_get_sv("Coro::API", 1);
		1461
		1462	coroapi.schedule = api_schedule;
		1463	coroapi.save = api_save;
		1464	coroapi.cede = api_cede;
		1465	coroapi.cede_notself = api_cede_notself;
		1466	coroapi.ready = api_ready;
		1467	coroapi.is_ready = api_is_ready;
		1468	coroapi.nready = &coro_nready;
		1469	coroapi.current = coro_current;
		1470
		1471	GCoroAPI = &coroapi;
		1472	sv_setiv (sv, (IV)&coroapi);
		1473	SvREADONLY_on (sv);
		1474	}
911	}	1475	}
912		1476
913	void	1477	void
914	ready(self)	1478	_set_current (SV *current)
915	SV * self	1479	PROTOTYPE: $
916	CODE:	1480	CODE:
917	av_push (coro_ready, SvREFCNT_inc (self));	1481	SvREFCNT_dec (SvRV (coro_current));
		1482	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1483
		1484	int
		1485	prio (Coro::State coro, int newprio = 0)
		1486	ALIAS:
		1487	nice = 1
		1488	CODE:
		1489	{
		1490	RETVAL = coro->prio;
		1491
		1492	if (items > 1)
		1493	{
		1494	if (ix)
		1495	newprio = coro->prio - newprio;
		1496
		1497	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1498	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1499
		1500	coro->prio = newprio;
		1501	}
		1502	}
		1503	OUTPUT:
		1504	RETVAL
		1505
		1506	SV *
		1507	ready (SV *self)
		1508	PROTOTYPE: $
		1509	CODE:
		1510	RETVAL = boolSV (api_ready (self));
		1511	OUTPUT:
		1512	RETVAL
		1513
		1514	int
		1515	nready (...)
		1516	PROTOTYPE:
		1517	CODE:
		1518	RETVAL = coro_nready;
		1519	OUTPUT:
		1520	RETVAL
		1521
		1522	MODULE = Coro::State PACKAGE = Coro::AIO
		1523
		1524	SV *
		1525	_get_state ()
		1526	CODE:
		1527	{
		1528	struct io_state *data;
		1529
		1530	RETVAL = newSV (sizeof (struct io_state));
		1531	data = (struct io_state *)SvPVX (RETVAL);
		1532	SvCUR_set (RETVAL, sizeof (struct io_state));
		1533	SvPOK_only (RETVAL);
		1534
		1535	data->errorno = errno;
		1536	data->laststype = PL_laststype;
		1537	data->laststatval = PL_laststatval;
		1538	data->statcache = PL_statcache;
		1539	}
		1540	OUTPUT:
		1541	RETVAL
918		1542
919	void	1543	void
920	schedule(...)	1544	_set_state (char *data_)
921	ALIAS:	1545	PROTOTYPE: $
922	cede = 1
923	CODE:	1546	CODE:
924	SV *prev = GvSV (coro_current);	1547	{
925	SV *next = av_shift (coro_ready);	1548	struct io_state data = (void )data_;
926		1549
927	if (next == &PL_sv_undef)	1550	errno = data->errorno;
928	next = SvREFCNT_inc (GvSV (coro_idle));	1551	PL_laststype = data->laststype;
		1552	PL_laststatval = data->laststatval;
		1553	PL_statcache = data->statcache;
		1554	}
929		1555
930	if (ix)
931	av_push (coro_ready, SvREFCNT_inc (prev));
932
933	GvSV (coro_current) = SvREFCNT_inc (next);
934	transfer (sv_to_coro (prev, "Coro::schedule", "current coroutine"),
935	sv_to_coro (next, "Coro::schedule", "next coroutine"),
936	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
937	SvREFCNT_dec (next);
938	SvREFCNT_dec (prev);
939

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Comparing Coro/Coro/State.xs (file contents): Revision 1.21 by root, Sat Aug 11 19:59:19 2001 UTC vs. Revision 1.157 by root, Fri Sep 21 02:01:13 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.21 by root, Sat Aug 11 19:59:19 2001 UTC vs.
Revision 1.157 by root, Fri Sep 21 02:01:13 2007 UTC