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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.34 by root, Fri Sep 14 15:40:56 2001 UTC vs.
Revision 1.152 by root, Thu Sep 20 12:02:25 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
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
20		37
21	#define MAY_FLUSH /* increases codesize and is rarely used */	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
22		44
23	#define SUB_INIT "Coro::State::initialize"	45	/* the maximum number of idle cctx that will be pooled */
24	#define UCORO_STATE "_coro_state"	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
		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
		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
25		92
26	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macro should declare a variable stacklevel that contains and approximation
27	* to the current C stack pointer. Its property is that it changes with each call	94	* to the current C stack pointer. Its property is that it changes with each call
28	* and should be unique. */	95	* and should be unique. */
		96	#define dSTACKLEVEL int stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	97	#define STACKLEVEL ((void *)&stacklevel)
30		98
31	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
32		100
33	#define labs(l) ((l) >= 0 ? (l) : -(l))	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))
34		110
35	#include "CoroAPI.h"	111	#include "CoroAPI.h"
36		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;
37	static struct CoroAPI coroapi;	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 */
38		137
39	/* this is actually not only the c stack but also c registers etc... */	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 */
40	typedef struct {	142	typedef struct coro_cctx {
41	int refcnt; /* pointer reference counter */	143	struct coro_cctx *next;
42	int usecnt; /* shared by how many coroutines */
43	int gencnt; /* generation counter */
44		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;
45	coro_context cctx;	153	coro_context cctx;
46		154
47	void *sptr;	155	#if CORO_USE_VALGRIND
48	long ssize; /* positive == mmap, otherwise malloc */	156	int valgrind_id;
49	} coro_stack;	157	#endif
		158	char inuse, mapped;
		159	} coro_cctx;
50		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 */
51	struct coro {	169	struct coro {
52	/* the optional C context */	170	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	171	coro_cctx *cctx;
54	void *cursp;
55	int gencnt;
56
57	/* optionally saved, might be zero */
58	AV *defav;
59	SV *defsv;
60	SV *errsv;
61
62	/* saved global state not related to stacks */
63	U8 dowarn;
64	I32 in_eval;
65
66	/* the stacks and related info (callchain etc..) */
67	PERL_SI *curstackinfo;
68	AV *curstack;
69	AV *mainstack;
70	SV **stack_sp;
71	OP *op;
72	SV **curpad;
73	SV **stack_base;
74	SV **stack_max;
75	SV **tmps_stack;
76	I32 tmps_floor;
77	I32 tmps_ix;
78	I32 tmps_max;
79	I32 *markstack;
80	I32 *markstack_ptr;
81	I32 *markstack_max;
82	I32 *scopestack;
83	I32 scopestack_ix;
84	I32 scopestack_max;
85	ANY *savestack;
86	I32 savestack_ix;
87	I32 savestack_max;
88	OP **retstack;
89	I32 retstack_ix;
90	I32 retstack_max;
91	COP *curcop;
92	JMPENV *top_env;
93		172
94	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
95	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 */
96	};	197	};
97		198
98	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
99	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
100		201
101	static AV main_mainstack; / used to differentiate between $main and others */	202	/ Coro ******************************************************************/
102	static HV *coro_state_stash;
103	static SV *ucoro_state_sv;
104	static U32 ucoro_state_hash;
105	static HV *padlist_cache;
106		203
107	/* mostly copied from op.c:cv_clone2 */	204	#define PRIO_MAX 3
108	STATIC AV *	205	#define PRIO_HIGH 1
109	clone_padlist (AV *protopadlist)	206	#define PRIO_NORMAL 0
		207	#define PRIO_LOW -1
		208	#define PRIO_IDLE -3
		209	#define PRIO_MIN -4
		210
		211	/* for Coro.pm */
		212	static SV *coro_current;
		213	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		214	static int coro_nready;
		215	static struct coro *first;
		216
		217	/ lowlevel stuff ********************************************************/
		218
		219	static AV *
		220	coro_clone_padlist (pTHX_ CV *cv)
110	{	221	{
111	AV *av;	222	AV *padlist = CvPADLIST (cv);
112	I32 ix;
113	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
114	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
115	SV **pname = AvARRAY (protopad_name);
116	SV **ppad = AvARRAY (protopad);
117	I32 fname = AvFILLp (protopad_name);
118	I32 fpad = AvFILLp (protopad);
119	AV newpadlist, newpad_name, *newpad;	223	AV newpadlist, newpad;
120	SV **npad;
121
122	newpad_name = newAV ();
123	for (ix = fname; ix >= 0; ix--)
124	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
125
126	newpad = newAV ();
127	av_fill (newpad, AvFILLp (protopad));
128	npad = AvARRAY (newpad);
129		224
130	newpadlist = newAV ();	225	newpadlist = newAV ();
131	AvREAL_off (newpadlist);	226	AvREAL_off (newpadlist);
132	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)));
133	av_store (newpadlist, 1, (SV *) newpad);	236	av_store (newpadlist, 1, (SV *)newpad);
134		237
135	av = newAV (); /* will be @_ */	238	return newpadlist;
136	av_extend (av, 0);	239	}
137	av_store (newpad, 0, (SV *) av);
138	AvFLAGS (av) = AVf_REIFY;
139		240
140	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))
141	{	246	{
142	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	247	I32 i = AvFILLp (padlist);
143	if (namesv && namesv != &PL_sv_undef)	248	while (i >= 0)
144	{	249	{
145	char name = SvPVX (namesv); / XXX */	250	SV **svp = av_fetch (padlist, i--, FALSE);
146	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')	251	if (svp)
147	{ /* lexical from outside? */
148	npad[ix] = SvREFCNT_inc (ppad[ix]);
149	}	252	{
150	else
151	{ /* our own lexical */
152	SV *sv;	253	SV *sv;
153	if (*name == '&')	254	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
154	sv = SvREFCNT_inc (ppad[ix]);	255	SvREFCNT_dec (sv);
155	else if (*name == '@')	256
156	sv = (SV *) newAV ();	257	SvREFCNT_dec (*svp);
157	else if (*name == '%')
158	sv = (SV *) newHV ();
159	else
160	sv = NEWSV (0, 0);
161	if (!SvPADBUSY (sv))
162	SvPADMY_on (sv);
163	npad[ix] = sv;
164	}	258	}
165	}	259	}
166	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))
167	{	358	{
168	npad[ix] = SvREFCNT_inc (ppad[ix]);	359	SvREFCNT_dec (c->irssv);
		360	c->irssv = 0;
169	}	361	}
170	else	362	else
171	{	363	{
172	SV *sv = NEWSV (0, 0);	364	REPLACE_SV (PL_rs, c->irssv);
173	SvPADTMP_on (sv);	365	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
174	npad[ix] = sv;	366	sv_setsv (c->irssv_sv, PL_rs);
175	}	367	}
176	}	368	}
177
178	#if 0 /* return -ENOTUNDERSTOOD */
179	/* Now that vars are all in place, clone nested closures. */
180
181	for (ix = fpad; ix > 0; ix--) {
182	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
183	if (namesv
184	&& namesv != &PL_sv_undef
185	&& !(SvFLAGS(namesv) & SVf_FAKE)
186	&& *SvPVX(namesv) == '&'
187	&& CvCLONE(ppad[ix]))
188	{
189	CV kid = cv_clone((CV)ppad[ix]);
190	SvREFCNT_dec(ppad[ix]);
191	CvCLONE_on(kid);
192	SvPADMY_on(kid);
193	npad[ix] = (SV*)kid;
194	}
195	}
196	#endif
197
198	return newpadlist;
199	}
200
201	#ifdef MAY_FLUSH
202	STATIC void
203	free_padlist (AV *padlist)
204	{
205	/* may be during global destruction */
206	if (SvREFCNT(padlist))
207	{
208	I32 i = AvFILLp(padlist);
209	while (i >= 0)
210	{
211	SV **svp = av_fetch(padlist, i--, FALSE);
212	SV sv = svp ? svp : Nullsv;
213	if (sv)
214	SvREFCNT_dec(sv);
215	}
216
217	SvREFCNT_dec((SV*)padlist);
218	}
219	}
220	#endif
221
222	/* the next two functions merely cache the padlists */
223	STATIC void
224	get_padlist (CV *cv)
225	{
226	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);
227
228	if (he && AvFILLp ((AV )he) >= 0)
229	CvPADLIST (cv) = (AV )av_pop ((AV )*he);
230	else
231	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
232	}
233
234	STATIC void
235	put_padlist (CV *cv)
236	{
237	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);
238
239	if (SvTYPE (*he) != SVt_PVAV)
240	{
241	SvREFCNT_dec (*he);
242	he = (SV )newAV ();
243	}
244
245	av_push ((AV )he, (SV *)CvPADLIST (cv));
246	}
247
248	#ifdef MAY_FLUSH
249	STATIC void
250	flush_padlist_cache ()
251	{
252	HV *hv = padlist_cache;
253	padlist_cache = newHV ();
254
255	if (hv_iterinit (hv))
256	{
257	HE *he;
258	AV *padlist;
259
260	while (!!(he = hv_iternext (hv)))
261	{
262	AV av = (AV )HeVAL(he);
263
264	/* casting is fun. */
265	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
266	free_padlist (padlist);
267	}
268	}
269
270	SvREFCNT_dec (hv);
271	}
272	#endif
273
274	#define SB do {
275	#define SE } while (0)
276
277	#define LOAD(state) load_state(aTHX_ (state));
278	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
279
280	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
281
282	static void
283	load_state(pTHX_ Coro__State c)
284	{
285	PL_dowarn = c->dowarn;
286	PL_in_eval = c->in_eval;
287
288	PL_curstackinfo = c->curstackinfo;
289	PL_curstack = c->curstack;
290	PL_mainstack = c->mainstack;
291	PL_stack_sp = c->stack_sp;
292	PL_op = c->op;
293	PL_curpad = c->curpad;
294	PL_stack_base = c->stack_base;
295	PL_stack_max = c->stack_max;
296	PL_tmps_stack = c->tmps_stack;
297	PL_tmps_floor = c->tmps_floor;
298	PL_tmps_ix = c->tmps_ix;
299	PL_tmps_max = c->tmps_max;
300	PL_markstack = c->markstack;
301	PL_markstack_ptr = c->markstack_ptr;
302	PL_markstack_max = c->markstack_max;
303	PL_scopestack = c->scopestack;
304	PL_scopestack_ix = c->scopestack_ix;
305	PL_scopestack_max = c->scopestack_max;
306	PL_savestack = c->savestack;
307	PL_savestack_ix = c->savestack_ix;
308	PL_savestack_max = c->savestack_max;
309	PL_retstack = c->retstack;
310	PL_retstack_ix = c->retstack_ix;
311	PL_retstack_max = c->retstack_max;
312	PL_curcop = c->curcop;
313	PL_top_env = c->top_env;
314
315	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
316	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
317	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
318		369
319	{	370	{
320	dSP;	371	dSP;
321	CV *cv;	372	CV *cv;
322		373
323	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
324	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
325	{	376	{
326	AV padlist = (AV )POPs;
327
328	if (padlist)
329	{
330	put_padlist (cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
331	CvPADLIST(cv) = padlist;	378	CvDEPTH (cv) = PTR2IV (POPs);
332	#ifdef USE_THREADS	379	CvPADLIST (cv) = (AV *)POPs;
333	/CvOWNER(cv) = (struct perl_thread )POPs;*/
334	#endif
335	}
336
337	++CvDEPTH(cv);
338	}	380	}
339		381
340	PUTBACK;	382	PUTBACK;
341	}	383	}
342	}	384	}
343		385
344	static void	386	static void
345	save_state(pTHX_ Coro__State c, int flags)	387	save_perl (pTHX_ Coro__State c)
346	{	388	{
347	{	389	{
348	dSP;	390	dSP;
349	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
353	/*	395	/*
354	* 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
355	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
356	*/	398	*/
357		399
		400	EXTEND (SP, 3 + 1);
358	PUSHs (Nullsv);	401	PUSHs (Nullsv);
359	/* this loop was inspired by pp_caller */	402	/* this loop was inspired by pp_caller */
360	for (;;)	403	for (;;)
361	{	404	{
362	while (cxix >= 0)	405	while (cxix >= 0)
363	{	406	{
364	PERL_CONTEXT *cx = &ccstk[cxix--];	407	PERL_CONTEXT *cx = &ccstk[cxix--];
365		408
366	if (CxTYPE(cx) == CXt_SUB)	409	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
367	{	410	{
368	CV *cv = cx->blk_sub.cv;	411	CV *cv = cx->blk_sub.cv;
		412
369	if (CvDEPTH(cv))	413	if (CvDEPTH (cv))
370	{	414	{
371	#ifdef USE_THREADS
372	/XPUSHs ((SV )CvOWNER(cv));*/
373	/CvOWNER(cv) = 0;/
374	/error must unlock this cv etc.. etc.../
375	#endif
376	EXTEND (SP, CvDEPTH(cv)*2);	415	EXTEND (SP, 3);
377
378	while (--CvDEPTH(cv))
379	{
380	/* this tells the restore code to increment CvDEPTH */
381	PUSHs (Nullsv);
382	PUSHs ((SV *)cv);
383	}
384
385	PUSHs ((SV *)CvPADLIST(cv));	416	PUSHs ((SV *)CvPADLIST (cv));
		417	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
386	PUSHs ((SV *)cv);	418	PUSHs ((SV *)cv);
387		419
388	get_padlist (cv); /* this is a monster */	420	CvDEPTH (cv) = 0;
		421	get_padlist (aTHX_ cv);
389	}	422	}
390	}
391	else if (CxTYPE(cx) == CXt_FORMAT)
392	{
393	/* I never used formats, so how should I know how these are implemented? */
394	/* my bold guess is as a simple, plain sub... */
395	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
396	}	423	}
397	}	424	}
398		425
399	if (top_si->si_type == PERLSI_MAIN)	426	if (top_si->si_type == PERLSI_MAIN)
400	break;	427	break;
…		…
405	}	432	}
406		433
407	PUTBACK;	434	PUTBACK;
408	}	435	}
409		436
410	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	437	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
411	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	438	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
412	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	439	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		440	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		441	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
413		442
414	c->dowarn = PL_dowarn;	443	#define VAR(name,type)c->name = PL_ ## name;
415	c->in_eval = PL_in_eval;	444	# include "state.h"
416		445	#undef VAR
417	c->curstackinfo = PL_curstackinfo;
418	c->curstack = PL_curstack;
419	c->mainstack = PL_mainstack;
420	c->stack_sp = PL_stack_sp;
421	c->op = PL_op;
422	c->curpad = PL_curpad;
423	c->stack_base = PL_stack_base;
424	c->stack_max = PL_stack_max;
425	c->tmps_stack = PL_tmps_stack;
426	c->tmps_floor = PL_tmps_floor;
427	c->tmps_ix = PL_tmps_ix;
428	c->tmps_max = PL_tmps_max;
429	c->markstack = PL_markstack;
430	c->markstack_ptr = PL_markstack_ptr;
431	c->markstack_max = PL_markstack_max;
432	c->scopestack = PL_scopestack;
433	c->scopestack_ix = PL_scopestack_ix;
434	c->scopestack_max = PL_scopestack_max;
435	c->savestack = PL_savestack;
436	c->savestack_ix = PL_savestack_ix;
437	c->savestack_max = PL_savestack_max;
438	c->retstack = PL_retstack;
439	c->retstack_ix = PL_retstack_ix;
440	c->retstack_max = PL_retstack_max;
441	c->curcop = PL_curcop;
442	c->top_env = PL_top_env;
443	}	446	}
444		447
445	/*	448	/*
446	* allocate various perl stacks. This is an exact copy	449	* allocate various perl stacks. This is an exact copy
447	* of perl.c:init_stacks, except that it uses less memory	450	* of perl.c:init_stacks, except that it uses less memory
448	* on the assumption that coroutines do not usually need	451	* on the (sometimes correct) assumption that coroutines do
449	* a lot of stackspace.	452	* not usually need a lot of stackspace.
450	*/	453	*/
451	STATIC void	454	#if CORO_PREFER_PERL_FUNCTIONS
		455	# define coro_init_stacks init_stacks
		456	#else
		457	static void
452	coro_init_stacks (pTHX)	458	coro_init_stacks (pTHX)
453	{	459	{
454	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	460	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
455	PL_curstackinfo->si_type = PERLSI_MAIN;	461	PL_curstackinfo->si_type = PERLSI_MAIN;
456	PL_curstack = PL_curstackinfo->si_stack;	462	PL_curstack = PL_curstackinfo->si_stack;
457	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	463	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
458		464
459	PL_stack_base = AvARRAY(PL_curstack);	465	PL_stack_base = AvARRAY(PL_curstack);
460	PL_stack_sp = PL_stack_base;	466	PL_stack_sp = PL_stack_base;
461	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	467	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
462		468
463	New(50,PL_tmps_stack,96,SV*);	469	New(50,PL_tmps_stack,128,SV*);
464	PL_tmps_floor = -1;	470	PL_tmps_floor = -1;
465	PL_tmps_ix = -1;	471	PL_tmps_ix = -1;
466	PL_tmps_max = 96;	472	PL_tmps_max = 128;
467		473
468	New(54,PL_markstack,16,I32);	474	New(54,PL_markstack,32,I32);
469	PL_markstack_ptr = PL_markstack;	475	PL_markstack_ptr = PL_markstack;
470	PL_markstack_max = PL_markstack + 16;	476	PL_markstack_max = PL_markstack + 32;
471		477
		478	#ifdef SET_MARK_OFFSET
472	SET_MARK_OFFSET;	479	SET_MARK_OFFSET;
		480	#endif
473		481
474	New(54,PL_scopestack,16,I32);	482	New(54,PL_scopestack,32,I32);
475	PL_scopestack_ix = 0;	483	PL_scopestack_ix = 0;
476	PL_scopestack_max = 16;	484	PL_scopestack_max = 32;
477		485
478	New(54,PL_savestack,96,ANY);	486	New(54,PL_savestack,64,ANY);
479	PL_savestack_ix = 0;	487	PL_savestack_ix = 0;
480	PL_savestack_max = 96;	488	PL_savestack_max = 64;
481		489
		490	#if !PERL_VERSION_ATLEAST (5,9,0)
482	New(54,PL_retstack,8,OP*);	491	New(54,PL_retstack,16,OP*);
483	PL_retstack_ix = 0;	492	PL_retstack_ix = 0;
484	PL_retstack_max = 8;	493	PL_retstack_max = 16;
		494	#endif
485	}	495	}
		496	#endif
486		497
487	/*	498	/*
488	* destroy the stacks, the callchain etc...	499	* destroy the stacks, the callchain etc...
489	* still there is a memleak of 128 bytes...
490	*/	500	*/
491	STATIC void	501	static void
492	destroy_stacks(pTHX)	502	coro_destroy_stacks (pTHX)
493	{	503	{
494	if (!IN_DESTRUCT)	504	if (!IN_DESTRUCT)
495	{	505	{
496	/* is this ugly, I ask? */	506	/* restore all saved variables and stuff */
497	while (PL_scopestack_ix)	507	LEAVE_SCOPE (0);
498	LEAVE;	508	assert (PL_tmps_floor == -1);
499		509
500	/* sure it is, but more important: is it correct?? :/ */	510	/* free all temporaries */
501	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
502	FREETMPS;	511	FREETMPS;
		512	assert (PL_tmps_ix == -1);
		513
		514	/* unwind all extra stacks */
		515	POPSTACK_TO (PL_mainstack);
		516
		517	/* unwind main stack */
		518	dounwind (-1);
503	}	519	}
504		520
505	while (PL_curstackinfo->si_next)	521	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	522	PL_curstackinfo = PL_curstackinfo->si_next;
507		523
508	while (PL_curstackinfo)	524	while (PL_curstackinfo)
509	{	525	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	526	PERL_SI *p = PL_curstackinfo->si_prev;
511		527
512	{
513	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */
516	}
517
518	if (!IN_DESTRUCT)	528	if (!IN_DESTRUCT)
519	{
520	dounwind(-1);
521	SvREFCNT_dec(PL_curstackinfo->si_stack);	529	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}
523		530
524	Safefree(PL_curstackinfo->si_cxstack);	531	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree(PL_curstackinfo);	532	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	533	PL_curstackinfo = p;
527	}	534	}
528		535
529	Safefree(PL_tmps_stack);	536	Safefree (PL_tmps_stack);
530	Safefree(PL_markstack);	537	Safefree (PL_markstack);
531	Safefree(PL_scopestack);	538	Safefree (PL_scopestack);
532	Safefree(PL_savestack);	539	Safefree (PL_savestack);
		540	#if !PERL_VERSION_ATLEAST (5,9,0)
533	Safefree(PL_retstack);	541	Safefree (PL_retstack);
534	}
535
536	static void
537	allocate_stack (Coro__State ctx, int alloc)
538	{
539	coro_stack *stack;
540
541	New (0, stack, 1, coro_stack);
542
543	stack->refcnt = 1;
544	stack->usecnt = 1;
545	stack->gencnt = ctx->gencnt = 0;
546	if (alloc)
547	{
548	#ifdef HAVE_MMAP
549	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
550	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANON, 0, 0);
551	if (stack->sptr == (void *)-1)
552	#endif	542	#endif
553	{	543	}
554	/FIXME//D//* reasonable stack size! */	544
555	stack->ssize = -4096 * sizeof (long);	545	static size_t
556	New (0, stack->sptr, 4096, long);	546	coro_rss (struct coro *coro)
557	}	547	{
		548	size_t rss = sizeof (coro);
		549
		550	if (coro->mainstack)
558	}	551	{
559	else	552	rss += sizeof (coro->curstackinfo);
560	stack->sptr = 0;	553	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		554	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
561		555
562	ctx->stack = stack;	556	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
563	}
564		557
565	static void	558	rss += coro->tmps_max * sizeof (SV *);
566	deallocate_stack (Coro__State ctx)
567	{
568	coro_stack *stack = ctx->stack;
569		559
570	ctx->stack = 0;	560	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
571		561
572	if (stack)	562	rss += coro->scopestack_max * sizeof (I32);
		563
		564	rss += coro->savestack_max * sizeof (ANY);
		565
		566	#if !PERL_VERSION_ATLEAST (5,9,0)
		567	rss += coro->retstack_max * sizeof (OP *);
		568	#endif
573	{	569	}
574	if (!--stack->refcnt)
575	{
576	#ifdef HAVE_MMAP
577	if (stack->ssize > 0 && stack->sptr)
578	munmap (stack->sptr, stack->ssize);
579	else
580	#else
581	Safefree (stack->sptr);
582	#endif
583	Safefree (stack);
584	}
585	else if (ctx->gencnt == stack->gencnt)
586	--stack->usecnt;
587	}
588	}
589		570
		571	return rss;
		572	}
		573
		574	/ coroutine stack handling **********************************************/
		575
590	static void	576	static void
591	setup_coro (void *arg)	577	setup_coro (pTHX_ struct coro *coro)
592	{	578	{
593	/*	579	/*
594	* emulate part of the perl startup here.	580	* emulate part of the perl startup here.
595	*/	581	*/
		582	coro_init_stacks (aTHX);
		583
		584	PL_curcop = &PL_compiling;
		585	PL_in_eval = EVAL_NULL;
		586	PL_comppad = 0;
		587	PL_curpm = 0;
		588	PL_localizing = 0;
		589	PL_dirty = 0;
		590	PL_restartop = 0;
		591
		592	{
		593	dSP;
		594	LOGOP myop;
		595
		596	SvREFCNT_dec (GvAV (PL_defgv));
		597	GvAV (PL_defgv) = coro->args; coro->args = 0;
		598
		599	Zero (&myop, 1, LOGOP);
		600	myop.op_next = Nullop;
		601	myop.op_flags = OPf_WANT_VOID;
		602
		603	PUSHMARK (SP);
		604	XPUSHs (av_shift (GvAV (PL_defgv)));
		605	PUTBACK;
		606	PL_op = (OP *)&myop;
		607	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		608	SPAGAIN;
		609	}
		610
		611	ENTER; /* necessary e.g. for dounwind */
		612	}
		613
		614	static void
		615	free_coro_mortal (pTHX)
		616	{
		617	if (coro_mortal)
		618	{
		619	SvREFCNT_dec (coro_mortal);
		620	coro_mortal = 0;
		621	}
		622	}
		623
		624	/* inject a fake call to Coro::State::_cctx_init into the execution */
		625	/* _cctx_init should be careful, as it could be called at almost any time */
		626	/* during execution of a perl program */
		627	static void NOINLINE
		628	prepare_cctx (pTHX_ coro_cctx *cctx)
		629	{
596	dSP;	630	dSP;
597	Coro__State ctx = (Coro__State)arg;	631	LOGOP myop;
598	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
599		632
600	coro_init_stacks (aTHX);	633	Zero (&myop, 1, LOGOP);
601	/PL_curcop = 0;/	634	myop.op_next = PL_op;
602	/PL_in_eval = PL_in_eval;/ /* inherit */	635	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
603	SvREFCNT_dec (GvAV (PL_defgv));
604	GvAV (PL_defgv) = ctx->args;
605		636
		637	PUSHMARK (SP);
		638	EXTEND (SP, 2);
		639	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		640	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		641	PUTBACK;
		642	PL_op = (OP *)&myop;
		643	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
606	SPAGAIN;	644	SPAGAIN;
		645	}
607		646
608	if (ctx->stack)	647	/*
609	{	648	* this is a _very_ stripped down perl interpreter ;)
610	ctx->cursp = 0;	649	*/
		650	static void
		651	coro_run (void *arg)
		652	{
		653	dTHX;
611		654
612	PUSHMARK(SP);	655	/* coro_run is the alternative tail of transfer(), so unlock here. */
613	PUTBACK;	656	UNLOCK;
614	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
615		657
616	if (SvTRUE (ERRSV))	658	PL_top_env = &PL_start_env;
617	croak (NULL);	659
618	else	660	/* inject a fake subroutine call to cctx_init */
619	croak ("FATAL: CCTXT coroutine returned!");	661	prepare_cctx (aTHX_ (coro_cctx *)arg);
		662
		663	/* somebody or something will hit me for both perl_run and PL_restartop */
		664	PL_restartop = PL_op;
		665	perl_run (PL_curinterp);
		666
		667	/*
		668	* If perl-run returns we assume exit() was being called or the coro
		669	* fell off the end, which seems to be the only valid (non-bug)
		670	* reason for perl_run to return. We try to exit by jumping to the
		671	* bootstrap-time "top" top_env, as we cannot restore the "main"
		672	* coroutine as Coro has no such concept
		673	*/
		674	PL_top_env = main_top_env;
		675	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		676	}
		677
		678	static coro_cctx *
		679	cctx_new ()
		680	{
		681	coro_cctx *cctx;
		682	void *stack_start;
		683	size_t stack_size;
		684
		685	++cctx_count;
		686
		687	Newz (0, cctx, 1, coro_cctx);
		688
		689	#if HAVE_MMAP
		690
		691	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		692	/* mmap supposedly does allocate-on-write for us */
		693	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		694
		695	if (cctx->sptr != (void *)-1)
		696	{
		697	# if CORO_STACKGUARD
		698	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		699	# endif
		700	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		701	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		702	cctx->mapped = 1;
620	}	703	}
621	else	704	else
622	{	705	#endif
623	UNOP myop;
624
625	PL_op = (OP *)&myop;
626
627	Zero(&myop, 1, UNOP);
628	myop.op_next = Nullop;
629	myop.op_flags = OPf_WANT_VOID;
630
631	PUSHMARK(SP);
632	XPUSHs (sub_init);
633	/*
634	* the next line is slightly wrong, as PL_op->op_next
635	* is actually being executed so we skip the first op.
636	* that doesn't matter, though, since it is only
637	* pp_nextstate and we never return...
638	* ah yes, and I don't care anyways ;)
639	*/
640	PUTBACK;
641	PL_op = pp_entersub();
642	SPAGAIN;
643
644	ENTER; /* necessary e.g. for dounwind */
645	}	706	{
646	}	707	cctx->ssize = coro_stacksize * (long)sizeof (long);
		708	New (0, cctx->sptr, coro_stacksize, long);
647		709
648	static void	710	if (!cctx->sptr)
649	continue_coro (void *arg)	711	{
650	{	712	perror ("FATAL: unable to allocate stack for coroutine");
651	/*	713	_exit (EXIT_FAILURE);
652	* this is a _very_ stripped down perl interpreter ;)	714	}
653	*/
654	Coro__State ctx = (Coro__State)arg;
655	JMPENV coro_start_env;
656		715
657	/* same as JMPENV_BOOTSTRAP */	716	stack_start = cctx->sptr;
658	Zero(&coro_start_env, 1, JMPENV);	717	stack_size = cctx->ssize;
659	coro_start_env.je_ret = -1;	718	}
660	coro_start_env.je_mustcatch = TRUE;
661	PL_top_env = &coro_start_env;
662		719
663	ctx->cursp = 0;	720	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		721	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		722
		723	return cctx;
		724	}
		725
		726	static void
		727	cctx_destroy (coro_cctx *cctx)
		728	{
		729	if (!cctx)
		730	return;
		731
		732	--cctx_count;
		733
		734	#if CORO_USE_VALGRIND
		735	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		736	#endif
		737
		738	#if HAVE_MMAP
		739	if (cctx->mapped)
		740	munmap (cctx->sptr, cctx->ssize);
		741	else
		742	#endif
		743	Safefree (cctx->sptr);
		744
		745	Safefree (cctx);
		746	}
		747
		748	static coro_cctx *
		749	cctx_get (pTHX)
		750	{
		751	while (cctx_first)
		752	{
		753	coro_cctx *cctx = cctx_first;
		754	cctx_first = cctx->next;
		755	--cctx_idle;
		756
		757	if (cctx->ssize >= coro_stacksize)
		758	return cctx;
		759
		760	cctx_destroy (cctx);
		761	}
		762
664	PL_op = PL_op->op_next;	763	PL_op = PL_op->op_next;
665	CALLRUNOPS(aTHX);	764	return cctx_new ();
666
667	abort ();
668	}	765	}
669		766
670	STATIC void	767	static void
		768	cctx_put (coro_cctx *cctx)
		769	{
		770	/* free another cctx if overlimit */
		771	if (cctx_idle >= MAX_IDLE_CCTX)
		772	{
		773	coro_cctx *first = cctx_first;
		774	cctx_first = first->next;
		775	--cctx_idle;
		776
		777	assert (!first->inuse);
		778	cctx_destroy (first);
		779	}
		780
		781	++cctx_idle;
		782	cctx->next = cctx_first;
		783	cctx_first = cctx;
		784	}
		785
		786	/ coroutine switching ***************************************************/
		787
		788	/* never call directly, always through the coro_state_transfer global variable */
		789	static void NOINLINE
671	transfer(pTHX_ struct coro prev, struct coro next, int flags)	790	transfer (pTHX_ struct coro prev, struct coro next)
672	{	791	{
673	dSTACKLEVEL;	792	dSTACKLEVEL;
674	static struct coro *xnext;
675		793
		794	/* sometimes transfer is only called to set idle_sp */
		795	if (!next)
		796	{
		797	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		798	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		799	}
676	if (prev != next)	800	else if (prev != next)
677	{	801	{
678	xnext = next;	802	coro_cctx *prev__cctx;
679		803
680	if (next->mainstack)	804	if (prev->flags & CF_NEW)
681	{	805	{
682	SAVE (prev, flags);	806	/* create a new empty context */
683	LOAD (next);	807	Newz (0, prev->cctx, 1, coro_cctx);
684		808	prev->cctx->inuse = 1;
685	/* mark this state as in-use */	809	prev->flags &= ~CF_NEW;
686	next->mainstack = 0;	810	prev->flags \|= CF_RUNNING;
687	next->tmps_ix = -2;
688
689	/* stacklevel changed? if yes, grab the stack for us! */
690	if (flags & TRANSFER_SAVE_CCTXT)
691	{
692	if (!prev->stack)
693	allocate_stack (prev, 0);
694	else if (prev->cursp != stacklevel
695	&& prev->stack->usecnt > 1)
696	{
697	prev->gencnt = ++prev->stack->gencnt;
698	prev->stack->usecnt = 1;
699	}
700
701	/* has our stack been invalidated? */
702	if (next->stack && next->stack->gencnt != next->gencnt)
703	{
704	deallocate_stack (next);
705	allocate_stack (next, 1);
706	coro_create (&(next->stack->cctx),
707	continue_coro, (void *)next,
708	next->stack->sptr, labs (next->stack->ssize));
709	}
710
711	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
712	/* don't add any code here */
713	}
714
715	}	811	}
716	else if (next->tmps_ix == -2)	812
717	croak ("tried to transfer to running coroutine");	813	/TODO: must not croak here /
		814	if (!prev->flags & CF_RUNNING)
		815	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		816
		817	if (next->flags & CF_RUNNING)
		818	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		819
		820	if (next->flags & CF_DESTROYED)
		821	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		822
		823	prev->flags &= ~CF_RUNNING;
		824	next->flags \|= CF_RUNNING;
		825
		826	LOCK;
		827
		828	if (next->flags & CF_NEW)
		829	{
		830	/* need to start coroutine */
		831	next->flags &= ~CF_NEW;
		832	/* first get rid of the old state */
		833	save_perl (aTHX_ prev);
		834	/* setup coroutine call */
		835	setup_coro (aTHX_ next);
		836	/* need a new stack */
		837	assert (!next->cctx);
		838	}
718	else	839	else
719	{	840	{
720	SAVE (prev, -1); /* first get rid of the old state */	841	/* coroutine already started */
721		842	save_perl (aTHX_ prev);
722	if (flags & TRANSFER_SAVE_CCTXT)	843	load_perl (aTHX_ next);
723	{
724	if (!prev->stack)
725	allocate_stack (prev, 0);
726
727	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
728	{
729	setup_coro (next);
730
731	prev->stack->refcnt++;
732	prev->stack->usecnt++;
733	next->stack = prev->stack;
734	next->gencnt = prev->gencnt;
735	}
736	else
737	{
738	allocate_stack (next, 1);
739	coro_create (&(next->stack->cctx),
740	setup_coro, (void *)next,
741	next->stack->sptr, labs (next->stack->ssize));
742	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
743	/* don't add any code here */
744	}
745	}
746	else
747	setup_coro (next);
748	}	844	}
749		845
750	/*	846	prev__cctx = prev->cctx;
751	* xnext is now either prev or next, depending on wether	847
752	* we switched the c stack or not. that's why i use a global	848	/* possibly "free" the cctx */
753	* variable, that should become thread-specific at one point.	849	if (prev__cctx->idle_sp == STACKLEVEL)
754	*/	850	{
755	xnext->cursp = stacklevel;	851	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		852	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		853
		854	prev->cctx = 0;
		855
		856	cctx_put (prev__cctx);
		857	prev__cctx->inuse = 0;
		858	}
		859
		860	if (!next->cctx)
		861	{
		862	next->cctx = cctx_get (aTHX);
		863	assert (!next->cctx->inuse);
		864	next->cctx->inuse = 1;
		865	}
		866
		867	if (prev__cctx != next->cctx)
		868	{
		869	prev__cctx->top_env = PL_top_env;
		870	PL_top_env = next->cctx->top_env;
		871	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		872	}
		873
		874	free_coro_mortal (aTHX);
		875	UNLOCK;
		876	}
		877	}
		878
		879	struct transfer_args
		880	{
		881	struct coro prev, next;
		882	};
		883
		884	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		885
		886	/ high level stuff ******************************************************/
		887
		888	static int
		889	coro_state_destroy (pTHX_ struct coro *coro)
		890	{
		891	if (coro->flags & CF_DESTROYED)
		892	return 0;
		893
		894	coro->flags \|= CF_DESTROYED;
		895
		896	if (coro->flags & CF_READY)
756	}	897	{
		898	/* reduce nready, as destroying a ready coro effectively unreadies it */
		899	/* alternative: look through all ready queues and remove the coro */
		900	LOCK;
		901	--coro_nready;
		902	UNLOCK;
		903	}
		904	else
		905	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
		906
		907	if (coro->mainstack && coro->mainstack != main_mainstack)
		908	{
		909	struct coro temp;
		910
		911	assert (!(coro->flags & CF_RUNNING));
		912
		913	Zero (&temp, 1, struct coro);
		914	temp.save = CORO_SAVE_ALL;
		915
		916	if (coro->flags & CF_RUNNING)
		917	croak ("FATAL: tried to destroy currently running coroutine");
		918
		919	save_perl (aTHX_ &temp);
		920	load_perl (aTHX_ coro);
		921
		922	coro_destroy_stacks (aTHX);
		923
		924	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		925
		926	coro->mainstack = 0;
		927	}
		928
		929	cctx_destroy (coro->cctx);
		930	SvREFCNT_dec (coro->args);
		931
		932	if (coro->next) coro->next->prev = coro->prev;
		933	if (coro->prev) coro->prev->next = coro->next;
		934	if (coro == first) first = coro->next;
		935
		936	return 1;
757	}	937	}
		938
		939	static int
		940	coro_state_free (pTHX_ SV sv, MAGIC mg)
		941	{
		942	struct coro coro = (struct coro )mg->mg_ptr;
		943	mg->mg_ptr = 0;
		944
		945	coro->hv = 0;
		946
		947	if (--coro->refcnt < 0)
		948	{
		949	coro_state_destroy (aTHX_ coro);
		950	Safefree (coro);
		951	}
		952
		953	return 0;
		954	}
		955
		956	static int
		957	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		958	{
		959	struct coro coro = (struct coro )mg->mg_ptr;
		960
		961	++coro->refcnt;
		962
		963	return 0;
		964	}
		965
		966	static MGVTBL coro_state_vtbl = {
		967	0, 0, 0, 0,
		968	coro_state_free,
		969	0,
		970	#ifdef MGf_DUP
		971	coro_state_dup,
		972	#else
		973	# define MGf_DUP 0
		974	#endif
		975	};
758		976
759	static struct coro *	977	static struct coro *
760	sv_to_coro (SV arg, const char funcname, const char *varname)	978	SvSTATE_ (pTHX_ SV *coro)
761	{	979	{
762	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	980	HV *stash;
763	{	981	MAGIC *mg;
764	HE he = hv_fetch_ent((HV )SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
765		982
766	if (!he)	983	if (SvROK (coro))
767	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);	984	coro = SvRV (coro);
768		985
769	arg = HeVAL(he);	986	stash = SvSTASH (coro);
		987	if (stash != coro_stash && stash != coro_state_stash)
770	}	988	{
		989	/* very slow, but rare, check */
		990	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		991	croak ("Coro::State object required");
771		992	}
772	/* must also be changed inside Coro::Cont::yield */
773	if (SvROK(arg) && SvOBJECT(SvRV(arg))
774	&& SvSTASH(SvRV(arg)) == coro_state_stash)
775	return (struct coro ) SvIV((SV)SvRV(arg));
776		993
777	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	994	mg = CORO_MAGIC (coro);
778	/NORETURN/	995	return (struct coro *)mg->mg_ptr;
779	}	996	}
780		997
		998	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		999
		1000	static void
		1001	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1002	{
		1003	ta->prev = SvSTATE (prev_sv);
		1004	ta->next = SvSTATE (next_sv);
		1005	}
		1006
		1007	static void
		1008	api_transfer (SV prev_sv, SV next_sv)
		1009	{
		1010	dTHX;
		1011	struct transfer_args ta;
		1012
		1013	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1014	TRANSFER (ta);
		1015	}
		1016
781	static void	1017	static int
782	api_transfer(pTHX_ SV prev, SV next, int flags)	1018	api_save (SV *coro_sv, int new_save)
783	{	1019	{
784	transfer(aTHX_	1020	dTHX;
785	sv_to_coro (prev, "Coro::transfer", "prev"),	1021	struct coro *coro = SvSTATE (coro_sv);
786	sv_to_coro (next, "Coro::transfer", "next"),	1022	int old_save = coro->save;
787	flags);	1023
		1024	if (new_save >= 0)
		1025	coro->save = new_save;
		1026
		1027	return old_save;
788	}	1028	}
789		1029
790	/ Coro ******************************************************************/	1030	/ Coro ******************************************************************/
791		1031
792	#define PRIO_MAX 3
793	#define PRIO_HIGH 1
794	#define PRIO_NORMAL 0
795	#define PRIO_LOW -1
796	#define PRIO_IDLE -3
797	#define PRIO_MIN -4
798
799	/* for Coro.pm */
800	static GV coro_current, coro_idle;
801	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
802	static int coro_nready;
803
804	static void	1032	static void
805	coro_enq (SV *sv)	1033	coro_enq (pTHX_ SV *coro_sv)
806	{	1034	{
807	if (SvROK (sv))	1035	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
808	{
809	SV *hv = SvRV (sv);
810	if (SvTYPE (hv) == SVt_PVHV)
811	{
812	SV *xprio = hv_fetch ((HV )hv, "prio", 4, 0);
813	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
814
815	prio = prio > PRIO_MAX ? PRIO_MAX
816	: prio < PRIO_MIN ? PRIO_MIN
817	: prio;
818
819	av_push (coro_ready [prio - PRIO_MIN], sv);
820	coro_nready++;
821
822	return;
823	}
824	}
825
826	croak ("Coro::ready tried to enqueue something that is not a coroutine");
827	}	1036	}
828		1037
829	static SV *	1038	static SV *
830	coro_deq (int min_prio)	1039	coro_deq (pTHX_ int min_prio)
831	{	1040	{
832	int prio = PRIO_MAX - PRIO_MIN;	1041	int prio = PRIO_MAX - PRIO_MIN;
833		1042
834	min_prio -= PRIO_MIN;	1043	min_prio -= PRIO_MIN;
835	if (min_prio < 0)	1044	if (min_prio < 0)
836	min_prio = 0;	1045	min_prio = 0;
837		1046
838	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1047	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
839	if (av_len (coro_ready[prio]) >= 0)	1048	if (AvFILLp (coro_ready [prio]) >= 0)
840	{
841	coro_nready--;
842	return av_shift (coro_ready[prio]);	1049	return av_shift (coro_ready [prio]);
843	}
844		1050
845	return 0;	1051	return 0;
846	}	1052	}
847		1053
848	static void	1054	static int
849	api_ready (SV *coro)	1055	api_ready (SV *coro_sv)
850	{	1056	{
		1057	dTHX;
		1058	struct coro *coro;
		1059
		1060	if (SvROK (coro_sv))
		1061	coro_sv = SvRV (coro_sv);
		1062
		1063	coro = SvSTATE (coro_sv);
		1064
		1065	if (coro->flags & CF_READY)
		1066	return 0;
		1067
		1068	coro->flags \|= CF_READY;
		1069
		1070	LOCK;
851	coro_enq (SvREFCNT_inc (coro));	1071	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
852	}	1072	++coro_nready;
		1073	UNLOCK;
853		1074
		1075	return 1;
		1076	}
		1077
854	static void	1078	static int
855	api_schedule (int cede)	1079	api_is_ready (SV *coro_sv)
856	{	1080	{
		1081	dTHX;
		1082	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1083	}
		1084
		1085	static void
		1086	prepare_schedule (pTHX_ struct transfer_args *ta)
		1087	{
857	SV prev, next;	1088	SV prev_sv, next_sv;
858		1089
		1090	for (;;)
		1091	{
		1092	LOCK;
		1093	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1094
		1095	/* nothing to schedule: call the idle handler */
		1096	if (!next_sv)
		1097	{
		1098	dSP;
		1099	UNLOCK;
		1100
		1101	ENTER;
		1102	SAVETMPS;
		1103
		1104	PUSHMARK (SP);
		1105	PUTBACK;
		1106	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1107
		1108	FREETMPS;
		1109	LEAVE;
		1110	continue;
		1111	}
		1112
		1113	ta->next = SvSTATE (next_sv);
		1114
		1115	/* cannot transfer to destroyed coros, skip and look for next */
		1116	if (ta->next->flags & CF_DESTROYED)
		1117	{
		1118	UNLOCK;
		1119	SvREFCNT_dec (next_sv);
		1120	/* coro_nready is already taken care of by destroy */
		1121	continue;
		1122	}
		1123
		1124	--coro_nready;
		1125	UNLOCK;
		1126	break;
		1127	}
		1128
		1129	/* free this only after the transfer */
859	prev = GvSV (coro_current);	1130	prev_sv = SvRV (coro_current);
		1131	SvRV_set (coro_current, next_sv);
		1132	ta->prev = SvSTATE (prev_sv);
860		1133
861	if (cede)	1134	assert (ta->next->flags & CF_READY);
862	coro_enq (SvREFCNT_inc (prev));	1135	ta->next->flags &= ~CF_READY;
863		1136
864	next = coro_deq (PRIO_MIN);	1137	LOCK;
		1138	free_coro_mortal (aTHX);
		1139	coro_mortal = prev_sv;
		1140	UNLOCK;
		1141	}
865		1142
866	if (!next)	1143	static void
867	next = SvREFCNT_inc (GvSV (coro_idle));	1144	prepare_cede (pTHX_ struct transfer_args *ta)
		1145	{
		1146	api_ready (coro_current);
		1147	prepare_schedule (aTHX_ ta);
		1148	}
868		1149
869	GvSV (coro_current) = SvREFCNT_inc (next);	1150	static int
870	transfer (aTHX_	1151	prepare_cede_notself (pTHX_ struct transfer_args *ta)
871	sv_to_coro (prev, "Coro::schedule", "current coroutine"),	1152	{
872	sv_to_coro (next, "Coro::schedule", "next coroutine"),	1153	if (coro_nready)
873	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);	1154	{
874	SvREFCNT_dec (next);	1155	SV *prev = SvRV (coro_current);
875	SvREFCNT_dec (prev);	1156	prepare_schedule (aTHX_ ta);
		1157	api_ready (prev);
		1158	return 1;
		1159	}
		1160	else
		1161	return 0;
		1162	}
		1163
		1164	static void
		1165	api_schedule (void)
		1166	{
		1167	dTHX;
		1168	struct transfer_args ta;
		1169
		1170	prepare_schedule (aTHX_ &ta);
		1171	TRANSFER (ta);
		1172	}
		1173
		1174	static int
		1175	api_cede (void)
		1176	{
		1177	dTHX;
		1178	struct transfer_args ta;
		1179
		1180	prepare_cede (aTHX_ &ta);
		1181
		1182	if (ta.prev != ta.next)
		1183	{
		1184	TRANSFER (ta);
		1185	return 1;
		1186	}
		1187	else
		1188	return 0;
		1189	}
		1190
		1191	static int
		1192	api_cede_notself (void)
		1193	{
		1194	dTHX;
		1195	struct transfer_args ta;
		1196
		1197	if (prepare_cede_notself (aTHX_ &ta))
		1198	{
		1199	TRANSFER (ta);
		1200	return 1;
		1201	}
		1202	else
		1203	return 0;
876	}	1204	}
877		1205
878	MODULE = Coro::State PACKAGE = Coro::State	1206	MODULE = Coro::State PACKAGE = Coro::State
879		1207
880	PROTOTYPES: ENABLE	1208	PROTOTYPES: DISABLE
881		1209
882	BOOT:	1210	BOOT:
883	{ /* {} necessary for stoopid perl-5.6.x */	1211	{
884	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1212	#ifdef USE_ITHREADS
885	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1213	MUTEX_INIT (&coro_mutex);
		1214	#endif
		1215	BOOT_PAGESIZE;
		1216
886	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1217	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
887		1218
888	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1219	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
889	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1220	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
890	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1221	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1222	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1223	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
891	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1224	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
892		1225	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
893	if (!padlist_cache)
894	padlist_cache = newHV ();
895		1226
896	main_mainstack = PL_mainstack;	1227	main_mainstack = PL_mainstack;
		1228	main_top_env = PL_top_env;
		1229
		1230	while (main_top_env->je_prev)
		1231	main_top_env = main_top_env->je_prev;
897		1232
898	coroapi.ver = CORO_API_VERSION;	1233	coroapi.ver = CORO_API_VERSION;
899	coroapi.transfer = api_transfer;	1234	coroapi.transfer = api_transfer;
900	}
901		1235
902	Coro::State	1236	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
903	_newprocess(args)	1237	}
904	SV * args	1238
905	PROTOTYPE: $	1239	SV *
		1240	new (char *klass, ...)
906	CODE:	1241	CODE:
907	Coro__State coro;	1242	{
		1243	struct coro *coro;
		1244	HV *hv;
		1245	int i;
908		1246
909	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
910	croak ("Coro::State::_newprocess expects an arrayref");
911
912	New (0, coro, 1, struct coro);	1247	Newz (0, coro, 1, struct coro);
		1248	coro->args = newAV ();
		1249	coro->save = CORO_SAVE_DEF;
		1250	coro->flags = CF_NEW;
913		1251
914	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1252	if (first) first->prev = coro;
915	coro->mainstack = 0; /* actual work is done inside transfer */	1253	coro->next = first;
916	coro->stack = 0;	1254	first = coro;
917		1255
918	RETVAL = coro;	1256	coro->hv = hv = newHV ();
		1257	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1258	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1259
		1260	for (i = 1; i < items; i++)
		1261	av_push (coro->args, newSVsv (ST (i)));
		1262	}
919	OUTPUT:	1263	OUTPUT:
920	RETVAL	1264	RETVAL
921		1265
		1266	int
		1267	save (SV *coro, int new_save = -1)
		1268	CODE:
		1269	RETVAL = api_save (coro, new_save);
		1270	OUTPUT:
		1271	RETVAL
		1272
		1273	int
		1274	save_also (SV *coro_sv, int save_also)
		1275	CODE:
		1276	{
		1277	struct coro *coro = SvSTATE (coro_sv);
		1278	RETVAL = coro->save;
		1279	coro->save \|= save_also;
		1280	}
		1281	OUTPUT:
		1282	RETVAL
		1283
922	void	1284	void
923	transfer(prev, next, flags)	1285	_set_stacklevel (...)
924	Coro::State_or_hashref prev	1286	ALIAS:
925	Coro::State_or_hashref next	1287	Coro::State::transfer = 1
926	int flags	1288	Coro::schedule = 2
927	PROTOTYPE: @	1289	Coro::cede = 3
		1290	Coro::cede_notself = 4
928	CODE:	1291	CODE:
929	PUTBACK;	1292	{
930	transfer (aTHX_ prev, next, flags);	1293	struct transfer_args ta;
931	SPAGAIN;	1294
		1295	switch (ix)
		1296	{
		1297	case 0:
		1298	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1299	ta.next = 0;
		1300	break;
		1301
		1302	case 1:
		1303	if (items != 2)
		1304	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1305
		1306	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1307	break;
		1308
		1309	case 2:
		1310	prepare_schedule (aTHX_ &ta);
		1311	break;
		1312
		1313	case 3:
		1314	prepare_cede (aTHX_ &ta);
		1315	break;
		1316
		1317	case 4:
		1318	if (!prepare_cede_notself (aTHX_ &ta))
		1319	XSRETURN_EMPTY;
		1320
		1321	break;
		1322	}
		1323
		1324	BARRIER;
		1325	TRANSFER (ta);
		1326
		1327	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1328	XSRETURN_YES;
		1329	}
		1330
		1331	bool
		1332	_destroy (SV *coro_sv)
		1333	CODE:
		1334	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1335	OUTPUT:
		1336	RETVAL
932		1337
933	void	1338	void
934	DESTROY(coro)
935	Coro::State coro
936	CODE:
937
938	if (coro->mainstack && coro->mainstack != main_mainstack)
939	{
940	struct coro temp;
941
942	PUTBACK;
943	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
944	LOAD(aTHX_ coro);
945	SPAGAIN;
946
947	destroy_stacks (aTHX);
948
949	LOAD((&temp)); /* this will get rid of defsv etc.. */
950	SPAGAIN;
951
952	coro->mainstack = 0;
953	}
954
955	deallocate_stack (coro);
956
957	Safefree (coro);
958
959	void
960	flush()
961	CODE:
962	#ifdef MAY_FLUSH
963	flush_padlist_cache ();
964	#endif
965
966	void
967	_exit(code)	1339	_exit (code)
968	int code	1340	int code
969	PROTOTYPE: $	1341	PROTOTYPE: $
970	CODE:	1342	CODE:
971	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
972	_exit (code);	1343	_exit (code);
973	#else
974	signal (SIGTERM, SIG_DFL);
975	raise (SIGTERM);
976	exit (code);
977	#endif
978		1344
979	MODULE = Coro::State PACKAGE = Coro::Cont	1345	int
		1346	cctx_stacksize (int new_stacksize = 0)
		1347	CODE:
		1348	RETVAL = coro_stacksize;
		1349	if (new_stacksize)
		1350	coro_stacksize = new_stacksize;
		1351	OUTPUT:
		1352	RETVAL
980		1353
981	# this is slightly dirty (should expose a c-level api)	1354	int
		1355	cctx_count ()
		1356	CODE:
		1357	RETVAL = cctx_count;
		1358	OUTPUT:
		1359	RETVAL
		1360
		1361	int
		1362	cctx_idle ()
		1363	CODE:
		1364	RETVAL = cctx_idle;
		1365	OUTPUT:
		1366	RETVAL
982		1367
983	void	1368	void
984	yield(...)	1369	list ()
985	PROTOTYPE: @	1370	PPCODE:
		1371	{
		1372	struct coro *coro;
		1373	for (coro = first; coro; coro = coro->next)
		1374	if (coro->hv)
		1375	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1376	}
		1377
		1378	void
		1379	_eval (Coro::State coro, SV *coderef)
		1380	CODE:
		1381	{
		1382	if (coro->mainstack)
		1383	{
		1384	struct coro temp;
		1385	Zero (&temp, 1, struct coro);
		1386	temp.save = CORO_SAVE_ALL;
		1387
		1388	if (!(coro->flags & CF_RUNNING))
		1389	{
		1390	save_perl (aTHX_ &temp);
		1391	load_perl (aTHX_ coro);
		1392	}
		1393
		1394	{
		1395	dSP;
		1396	ENTER;
		1397	SAVETMPS;
		1398	PUSHMARK (SP);
		1399	PUTBACK;
		1400	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1401	SPAGAIN;
		1402	FREETMPS;
		1403	LEAVE;
		1404	PUTBACK;
		1405	}
		1406
		1407	if (!(coro->flags & CF_RUNNING))
		1408	{
		1409	save_perl (aTHX_ coro);
		1410	load_perl (aTHX_ &temp);
		1411	}
		1412	}
		1413	}
		1414
		1415	SV *
		1416	is_ready (Coro::State coro)
		1417	PROTOTYPE: $
		1418	ALIAS:
		1419	is_ready = CF_READY
		1420	is_running = CF_RUNNING
		1421	is_new = CF_NEW
		1422	is_destroyed = CF_DESTROYED
		1423	CODE:
		1424	RETVAL = boolSV (coro->flags & ix);
		1425	OUTPUT:
		1426	RETVAL
		1427
		1428	IV
		1429	rss (Coro::State coro)
		1430	PROTOTYPE: $
986	CODE:	1431	CODE:
987	static SV *returnstk;	1432	RETVAL = coro_rss (coro);
988	SV *sv;	1433	OUTPUT:
989	AV *defav = GvAV (PL_defgv);	1434	RETVAL
990	struct coro prev, next;
991		1435
992	if (!returnstk)
993	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
994
995	/* set up @_ -- ugly */
996	av_clear (defav);
997	av_fill (defav, items - 1);
998	while (items--)
999	av_store (defav, items, SvREFCNT_inc (ST(items)));
1000
1001	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1002	sv = av_pop ((AV *)SvRV (returnstk));
1003	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
1004	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
1005	SvREFCNT_dec (sv);
1006
1007	transfer(aTHX_ prev, next, 0);
1008		1436
1009	MODULE = Coro::State PACKAGE = Coro	1437	MODULE = Coro::State PACKAGE = Coro
1010		1438
1011	# this is slightly dirty (should expose a c-level api)
1012
1013	BOOT:	1439	BOOT:
1014	{	1440	{
1015	int i;	1441	int i;
		1442
1016	HV *stash = gv_stashpv ("Coro", TRUE);	1443	coro_stash = gv_stashpv ("Coro", TRUE);
1017		1444
1018	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1445	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1019	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1446	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1020	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1447	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1021	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1448	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1022	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1449	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1023	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1450	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1024		1451
1025	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1452	coro_current = get_sv ("Coro::current", FALSE);
1026	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1453	SvREADONLY_on (coro_current);
1027		1454
1028	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1455	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1029	coro_ready[i] = newAV ();	1456	coro_ready[i] = newAV ();
1030		1457
1031	{	1458	{
1032	SV *sv = perl_get_sv("Coro::API", 1);	1459	SV *sv = perl_get_sv("Coro::API", 1);
1033		1460
1034	coroapi.schedule = api_schedule;	1461	coroapi.schedule = api_schedule;
		1462	coroapi.save = api_save;
		1463	coroapi.cede = api_cede;
		1464	coroapi.cede_notself = api_cede_notself;
1035	coroapi.ready = api_ready;	1465	coroapi.ready = api_ready;
		1466	coroapi.is_ready = api_is_ready;
1036	coroapi.nready = &coro_nready;	1467	coroapi.nready = &coro_nready;
1037	coroapi.current = coro_current;	1468	coroapi.current = coro_current;
1038		1469
1039	GCoroAPI = &coroapi;	1470	GCoroAPI = &coroapi;
1040	sv_setiv(sv, (IV)&coroapi);	1471	sv_setiv (sv, (IV)&coroapi);
1041	SvREADONLY_on(sv);	1472	SvREADONLY_on (sv);
1042	}	1473	}
1043	}	1474	}
1044		1475
1045	void	1476	void
1046	ready(self)	1477	_set_current (SV *current)
1047	SV * self	1478	PROTOTYPE: $
1048	CODE:	1479	CODE:
1049	api_ready (self);	1480	SvREFCNT_dec (SvRV (coro_current));
		1481	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1050		1482
1051	int	1483	int
		1484	prio (Coro::State coro, int newprio = 0)
		1485	ALIAS:
		1486	nice = 1
		1487	CODE:
		1488	{
		1489	RETVAL = coro->prio;
		1490
		1491	if (items > 1)
		1492	{
		1493	if (ix)
		1494	newprio = coro->prio - newprio;
		1495
		1496	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1497	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1498
		1499	coro->prio = newprio;
		1500	}
		1501	}
		1502	OUTPUT:
		1503	RETVAL
		1504
		1505	SV *
		1506	ready (SV *self)
		1507	PROTOTYPE: $
		1508	CODE:
		1509	RETVAL = boolSV (api_ready (self));
		1510	OUTPUT:
		1511	RETVAL
		1512
		1513	int
1052	nready(...)	1514	nready (...)
1053	PROTOTYPE:	1515	PROTOTYPE:
1054	CODE:	1516	CODE:
1055	RETVAL = coro_nready;	1517	RETVAL = coro_nready;
1056	OUTPUT:	1518	OUTPUT:
1057	RETVAL	1519	RETVAL
1058		1520
		1521	MODULE = Coro::State PACKAGE = Coro::AIO
		1522
		1523	SV *
		1524	_get_state ()
		1525	CODE:
		1526	{
		1527	struct io_state *data;
		1528
		1529	RETVAL = newSV (sizeof (struct io_state));
		1530	data = (struct io_state *)SvPVX (RETVAL);
		1531	SvCUR_set (RETVAL, sizeof (struct io_state));
		1532	SvPOK_only (RETVAL);
		1533
		1534	data->errorno = errno;
		1535	data->laststype = PL_laststype;
		1536	data->laststatval = PL_laststatval;
		1537	data->statcache = PL_statcache;
		1538	}
		1539	OUTPUT:
		1540	RETVAL
		1541
1059	void	1542	void
1060	schedule(...)	1543	_set_state (char *data_)
1061	PROTOTYPE:	1544	PROTOTYPE: $
1062	ALIAS:
1063	cede = 1
1064	CODE:	1545	CODE:
1065	api_schedule (ix);	1546	{
		1547	struct io_state data = (void )data_;
1066		1548
		1549	errno = data->errorno;
		1550	PL_laststype = data->laststype;
		1551	PL_laststatval = data->laststatval;
		1552	PL_statcache = data->statcache;
		1553	}
		1554

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Comparing Coro/Coro/State.xs (file contents): Revision 1.34 by root, Fri Sep 14 15:40:56 2001 UTC vs. Revision 1.152 by root, Thu Sep 20 12:02:25 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.34 by root, Fri Sep 14 15:40:56 2001 UTC vs.
Revision 1.152 by root, Thu Sep 20 12:02:25 2007 UTC