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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.32 by root, Sun Aug 26 17:01:54 2001 UTC vs.
Revision 1.158 by root, Fri Sep 21 02:23:48 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
25		47
26	/* The next macro should declare a variable stacklevel that contains and approximation	48	#define PERL_VERSION_ATLEAST(a,b,c) \
27	* to the current C stack pointer. Its property is that it changes with each call	49	(PERL_REVISION > (a) \
28	* and should be unique. */	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
		92
		93	/* The next macros try to return the current stack pointer, in an as
		94	* portable way as possible. */
		95	#define dSTACKLEVEL volatile char stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
30		97
31	#define labs(l) ((l) >= 0 ? (l) : -(l))	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		99
		100	#if __GNUC__ >= 3
		101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		103	#else
		104	# define attribute(x)
		105	# define BARRIER
		106	#endif
		107
		108	#define NOINLINE attribute ((noinline))
32		109
33	#include "CoroAPI.h"	110	#include "CoroAPI.h"
34		111
		112	#ifdef USE_ITHREADS
		113	static perl_mutex coro_mutex;
		114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		116	#else
		117	# define LOCK (void)0
		118	# define UNLOCK (void)0
		119	#endif
		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
35	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
		132	static AV main_mainstack; / used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
		134	static HV coro_state_stash, coro_stash;
		135	static SV coro_mortal; / will be freed after next transfer */
36		136
37	/* this is actually not only the c stack but also c registers etc... */	137	static struct coro_cctx *cctx_first;
		138	static int cctx_count, cctx_idle;
		139
		140	/* this is a structure representing a c-level coroutine */
38	typedef struct {	141	typedef struct coro_cctx {
39	int refcnt; /* pointer reference counter */	142	struct coro_cctx *next;
40	int usecnt; /* shared by how many coroutines */
41	int gencnt; /* generation counter */
42		143
		144	/* the stack */
		145	void *sptr;
		146	size_t ssize;
		147
		148	/* cpu state */
		149	void idle_sp; / sp of top-level transfer/schedule/cede call */
		150	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		151	JMPENV *top_env;
43	coro_context cctx;	152	coro_context cctx;
44		153
45	void *sptr;	154	#if CORO_USE_VALGRIND
46	long ssize; /* positive == mmap, otherwise malloc */	155	int valgrind_id;
47	} coro_stack;	156	#endif
		157	char inuse, mapped;
		158	} coro_cctx;
48		159
		160	enum {
		161	CF_RUNNING = 0x0001, /* coroutine is running */
		162	CF_READY = 0x0002, /* coroutine is ready */
		163	CF_NEW = 0x0004, /* has never been switched to */
		164	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		165	};
		166
		167	/* this is a structure representing a perl-level coroutine */
49	struct coro {	168	struct coro {
50	/* the optional C context */	169	/* the c coroutine allocated to this perl coroutine, if any */
51	coro_stack *stack;	170	coro_cctx *cctx;
52	void *cursp;
53	int gencnt;
54
55	/* optionally saved, might be zero */
56	AV *defav;
57	SV *defsv;
58	SV *errsv;
59
60	/* saved global state not related to stacks */
61	U8 dowarn;
62	I32 in_eval;
63
64	/* the stacks and related info (callchain etc..) */
65	PERL_SI *curstackinfo;
66	AV *curstack;
67	AV *mainstack;
68	SV **stack_sp;
69	OP *op;
70	SV **curpad;
71	SV **stack_base;
72	SV **stack_max;
73	SV **tmps_stack;
74	I32 tmps_floor;
75	I32 tmps_ix;
76	I32 tmps_max;
77	I32 *markstack;
78	I32 *markstack_ptr;
79	I32 *markstack_max;
80	I32 *scopestack;
81	I32 scopestack_ix;
82	I32 scopestack_max;
83	ANY *savestack;
84	I32 savestack_ix;
85	I32 savestack_max;
86	OP **retstack;
87	I32 retstack_ix;
88	I32 retstack_max;
89	COP *curcop;
90	JMPENV *top_env;
91		171
92	/* data associated with this coroutine (initial args) */	172	/* data associated with this coroutine (initial args) */
93	AV *args;	173	AV *args;
		174	int refcnt;
		175	int save; /* CORO_SAVE flags */
		176	int flags; /* CF_ flags */
		177
		178	/* optionally saved, might be zero */
		179	AV defav; / @_ */
		180	SV defsv; / $_ */
		181	SV errsv; / $@ */
		182	GV deffh; / default filehandle */
		183	SV irssv; / $/ */
		184	SV irssv_sv; / real $/ cache */
		185
		186	#define VAR(name,type) type name;
		187	# include "state.h"
		188	#undef VAR
		189
		190	/* coro process data */
		191	int prio;
		192
		193	/* linked list */
		194	struct coro next, prev;
		195	HV hv; / the perl hash associated with this coro, if any */
94	};	196	};
95		197
96	typedef struct coro *Coro__State;	198	typedef struct coro *Coro__State;
97	typedef struct coro *Coro__State_or_hashref;	199	typedef struct coro *Coro__State_or_hashref;
98		200
99	static AV main_mainstack; / used to differentiate between $main and others */	201	/ Coro ******************************************************************/
100	static HV *coro_state_stash;
101	static SV *ucoro_state_sv;
102	static U32 ucoro_state_hash;
103	static HV *padlist_cache;
104		202
105	/* mostly copied from op.c:cv_clone2 */	203	#define PRIO_MAX 3
106	STATIC AV *	204	#define PRIO_HIGH 1
107	clone_padlist (AV *protopadlist)	205	#define PRIO_NORMAL 0
		206	#define PRIO_LOW -1
		207	#define PRIO_IDLE -3
		208	#define PRIO_MIN -4
		209
		210	/* for Coro.pm */
		211	static SV *coro_current;
		212	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		213	static int coro_nready;
		214	static struct coro *coro_first;
		215
		216	/ lowlevel stuff ********************************************************/
		217
		218	static AV *
		219	coro_clone_padlist (pTHX_ CV *cv)
108	{	220	{
109	AV *av;	221	AV *padlist = CvPADLIST (cv);
110	I32 ix;
111	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
112	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
113	SV **pname = AvARRAY (protopad_name);
114	SV **ppad = AvARRAY (protopad);
115	I32 fname = AvFILLp (protopad_name);
116	I32 fpad = AvFILLp (protopad);
117	AV newpadlist, newpad_name, *newpad;	222	AV newpadlist, newpad;
118	SV **npad;
119
120	newpad_name = newAV ();
121	for (ix = fname; ix >= 0; ix--)
122	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124	newpad = newAV ();
125	av_fill (newpad, AvFILLp (protopad));
126	npad = AvARRAY (newpad);
127		223
128	newpadlist = newAV ();	224	newpadlist = newAV ();
129	AvREAL_off (newpadlist);	225	AvREAL_off (newpadlist);
130	av_store (newpadlist, 0, (SV *) newpad_name);	226	#if PERL_VERSION_ATLEAST (5,9,0)
		227	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		228	#else
		229	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		230	#endif
		231	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		232	--AvFILLp (padlist);
		233
		234	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
131	av_store (newpadlist, 1, (SV *) newpad);	235	av_store (newpadlist, 1, (SV *)newpad);
132		236
133	av = newAV (); /* will be @_ */	237	return newpadlist;
134	av_extend (av, 0);	238	}
135	av_store (newpad, 0, (SV *) av);
136	AvFLAGS (av) = AVf_REIFY;
137		239
138	for (ix = fpad; ix > 0; ix--)	240	static void
		241	free_padlist (pTHX_ AV *padlist)
		242	{
		243	/* may be during global destruction */
		244	if (SvREFCNT (padlist))
139	{	245	{
140	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	246	I32 i = AvFILLp (padlist);
141	if (namesv && namesv != &PL_sv_undef)	247	while (i >= 0)
142	{	248	{
143	char name = SvPVX (namesv); / XXX */	249	SV **svp = av_fetch (padlist, i--, FALSE);
144	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')	250	if (svp)
145	{ /* lexical from outside? */
146	npad[ix] = SvREFCNT_inc (ppad[ix]);
147	}	251	{
148	else
149	{ /* our own lexical */
150	SV *sv;	252	SV *sv;
151	if (*name == '&')	253	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
152	sv = SvREFCNT_inc (ppad[ix]);	254	SvREFCNT_dec (sv);
153	else if (*name == '@')	255
154	sv = (SV *) newAV ();	256	SvREFCNT_dec (*svp);
155	else if (*name == '%')
156	sv = (SV *) newHV ();
157	else
158	sv = NEWSV (0, 0);
159	if (!SvPADBUSY (sv))
160	SvPADMY_on (sv);
161	npad[ix] = sv;
162	}	257	}
163	}	258	}
164	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))	259
		260	SvREFCNT_dec ((SV*)padlist);
		261	}
		262	}
		263
		264	static int
		265	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		266	{
		267	AV *padlist;
		268	AV av = (AV )mg->mg_obj;
		269
		270	/* casting is fun. */
		271	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		272	free_padlist (aTHX_ padlist);
		273
		274	SvREFCNT_dec (av);
		275
		276	return 0;
		277	}
		278
		279	#define PERL_MAGIC_coro PERL_MAGIC_ext
		280
		281	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		282
		283	#define CORO_MAGIC(cv) \
		284	SvMAGIC (cv) \
		285	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		286	? SvMAGIC (cv) \
		287	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		288	: 0
		289
		290	/* the next two functions merely cache the padlists */
		291	static void
		292	get_padlist (pTHX_ CV *cv)
		293	{
		294	MAGIC *mg = CORO_MAGIC (cv);
		295	AV *av;
		296
		297	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
		298	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		299	else
		300	{
		301	#if CORO_PREFER_PERL_FUNCTIONS
		302	/* this is probably cleaner, but also slower? */
		303	CV *cp = Perl_cv_clone (cv);
		304	CvPADLIST (cv) = CvPADLIST (cp);
		305	CvPADLIST (cp) = 0;
		306	SvREFCNT_dec (cp);
		307	#else
		308	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		309	#endif
		310	}
		311	}
		312
		313	static void
		314	put_padlist (pTHX_ CV *cv)
		315	{
		316	MAGIC *mg = CORO_MAGIC (cv);
		317	AV *av;
		318
		319	if (!mg)
		320	{
		321	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		322	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		323	mg->mg_virtual = &vtbl_coro;
		324	mg->mg_obj = (SV *)newAV ();
		325	}
		326
		327	av = (AV *)mg->mg_obj;
		328
		329	if (AvFILLp (av) >= AvMAX (av))
		330	av_extend (av, AvMAX (av) + 1);
		331
		332	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
		333	}
		334
		335	/ load & save, init *****************************************************/
		336
		337	#define SB do {
		338	#define SE } while (0)
		339
		340	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
		341
		342	static void
		343	load_perl (pTHX_ Coro__State c)
		344	{
		345	#define VAR(name,type) PL_ ## name = c->name;
		346	# include "state.h"
		347	#undef VAR
		348
		349	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
		350	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
		351	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		352	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		353
		354	if (c->irssv)
		355	{
		356	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
165	{	357	{
166	npad[ix] = SvREFCNT_inc (ppad[ix]);	358	SvREFCNT_dec (c->irssv);
		359	c->irssv = 0;
167	}	360	}
168	else	361	else
169	{	362	{
170	SV *sv = NEWSV (0, 0);	363	REPLACE_SV (PL_rs, c->irssv);
171	SvPADTMP_on (sv);	364	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
172	npad[ix] = sv;	365	sv_setsv (c->irssv_sv, PL_rs);
173	}	366	}
174	}	367	}
175
176	#if 0 /* return -ENOTUNDERSTOOD */
177	/* Now that vars are all in place, clone nested closures. */
178
179	for (ix = fpad; ix > 0; ix--) {
180	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181	if (namesv
182	&& namesv != &PL_sv_undef
183	&& !(SvFLAGS(namesv) & SVf_FAKE)
184	&& *SvPVX(namesv) == '&'
185	&& CvCLONE(ppad[ix]))
186	{
187	CV kid = cv_clone((CV)ppad[ix]);
188	SvREFCNT_dec(ppad[ix]);
189	CvCLONE_on(kid);
190	SvPADMY_on(kid);
191	npad[ix] = (SV*)kid;
192	}
193	}
194	#endif
195
196	return newpadlist;
197	}
198
199	#ifdef MAY_FLUSH
200	STATIC void
201	free_padlist (AV *padlist)
202	{
203	/* may be during global destruction */
204	if (SvREFCNT(padlist))
205	{
206	I32 i = AvFILLp(padlist);
207	while (i >= 0)
208	{
209	SV **svp = av_fetch(padlist, i--, FALSE);
210	SV sv = svp ? svp : Nullsv;
211	if (sv)
212	SvREFCNT_dec(sv);
213	}
214
215	SvREFCNT_dec((SV*)padlist);
216	}
217	}
218	#endif
219
220	/* the next two functions merely cache the padlists */
221	STATIC void
222	get_padlist (CV *cv)
223	{
224	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);
225
226	if (he && AvFILLp ((AV )he) >= 0)
227	CvPADLIST (cv) = (AV )av_pop ((AV )*he);
228	else
229	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
230	}
231
232	STATIC void
233	put_padlist (CV *cv)
234	{
235	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);
236
237	if (SvTYPE (*he) != SVt_PVAV)
238	{
239	SvREFCNT_dec (*he);
240	he = (SV )newAV ();
241	}
242
243	av_push ((AV )he, (SV *)CvPADLIST (cv));
244	}
245
246	#ifdef MAY_FLUSH
247	STATIC void
248	flush_padlist_cache ()
249	{
250	HV *hv = padlist_cache;
251	padlist_cache = newHV ();
252
253	if (hv_iterinit (hv))
254	{
255	HE *he;
256	AV *padlist;
257
258	while (!!(he = hv_iternext (hv)))
259	{
260	AV av = (AV )HeVAL(he);
261
262	/* casting is fun. */
263	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
264	free_padlist (padlist);
265	}
266	}
267
268	SvREFCNT_dec (hv);
269	}
270	#endif
271
272	#define SB do {
273	#define SE } while (0)
274
275	#define LOAD(state) load_state(aTHX_ (state));
276	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
277
278	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
279
280	static void
281	load_state(pTHX_ Coro__State c)
282	{
283	PL_dowarn = c->dowarn;
284	PL_in_eval = c->in_eval;
285
286	PL_curstackinfo = c->curstackinfo;
287	PL_curstack = c->curstack;
288	PL_mainstack = c->mainstack;
289	PL_stack_sp = c->stack_sp;
290	PL_op = c->op;
291	PL_curpad = c->curpad;
292	PL_stack_base = c->stack_base;
293	PL_stack_max = c->stack_max;
294	PL_tmps_stack = c->tmps_stack;
295	PL_tmps_floor = c->tmps_floor;
296	PL_tmps_ix = c->tmps_ix;
297	PL_tmps_max = c->tmps_max;
298	PL_markstack = c->markstack;
299	PL_markstack_ptr = c->markstack_ptr;
300	PL_markstack_max = c->markstack_max;
301	PL_scopestack = c->scopestack;
302	PL_scopestack_ix = c->scopestack_ix;
303	PL_scopestack_max = c->scopestack_max;
304	PL_savestack = c->savestack;
305	PL_savestack_ix = c->savestack_ix;
306	PL_savestack_max = c->savestack_max;
307	PL_retstack = c->retstack;
308	PL_retstack_ix = c->retstack_ix;
309	PL_retstack_max = c->retstack_max;
310	PL_curcop = c->curcop;
311	PL_top_env = c->top_env;
312
313	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
316		368
317	{	369	{
318	dSP;	370	dSP;
319	CV *cv;	371	CV *cv;
320		372
321	/* now do the ugly restore mess */	373	/* now do the ugly restore mess */
322	while ((cv = (CV *)POPs))	374	while ((cv = (CV *)POPs))
323	{	375	{
324	AV padlist = (AV )POPs;
325
326	if (padlist)
327	{
328	put_padlist (cv); /* mark this padlist as available */	376	put_padlist (aTHX_ cv); /* mark this padlist as available */
329	CvPADLIST(cv) = padlist;	377	CvDEPTH (cv) = PTR2IV (POPs);
330	#ifdef USE_THREADS	378	CvPADLIST (cv) = (AV *)POPs;
331	/CvOWNER(cv) = (struct perl_thread )POPs;*/
332	#endif
333	}
334
335	++CvDEPTH(cv);
336	}	379	}
337		380
338	PUTBACK;	381	PUTBACK;
339	}	382	}
340	}	383	}
341		384
342	static void	385	static void
343	save_state(pTHX_ Coro__State c, int flags)	386	save_perl (pTHX_ Coro__State c)
344	{	387	{
345	{	388	{
346	dSP;	389	dSP;
347	I32 cxix = cxstack_ix;	390	I32 cxix = cxstack_ix;
348	PERL_CONTEXT *ccstk = cxstack;	391	PERL_CONTEXT *ccstk = cxstack;
351	/*	394	/*
352	* the worst thing you can imagine happens first - we have to save	395	* the worst thing you can imagine happens first - we have to save
353	* (and reinitialize) all cv's in the whole callchain :(	396	* (and reinitialize) all cv's in the whole callchain :(
354	*/	397	*/
355		398
356	PUSHs (Nullsv);	399	XPUSHs (Nullsv);
357	/* this loop was inspired by pp_caller */	400	/* this loop was inspired by pp_caller */
358	for (;;)	401	for (;;)
359	{	402	{
360	while (cxix >= 0)	403	while (cxix >= 0)
361	{	404	{
362	PERL_CONTEXT *cx = &ccstk[cxix--];	405	PERL_CONTEXT *cx = &ccstk[cxix--];
363		406
364	if (CxTYPE(cx) == CXt_SUB)	407	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
365	{	408	{
366	CV *cv = cx->blk_sub.cv;	409	CV *cv = cx->blk_sub.cv;
		410
367	if (CvDEPTH(cv))	411	if (CvDEPTH (cv))
368	{	412	{
369	#ifdef USE_THREADS
370	/XPUSHs ((SV )CvOWNER(cv));*/
371	/CvOWNER(cv) = 0;/
372	/error must unlock this cv etc.. etc.../
373	#endif
374	EXTEND (SP, CvDEPTH(cv)*2);	413	EXTEND (SP, 3);
375
376	while (--CvDEPTH(cv))
377	{
378	/* this tells the restore code to increment CvDEPTH */
379	PUSHs (Nullsv);
380	PUSHs ((SV *)cv);
381	}
382
383	PUSHs ((SV *)CvPADLIST(cv));	414	PUSHs ((SV *)CvPADLIST (cv));
		415	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
384	PUSHs ((SV *)cv);	416	PUSHs ((SV *)cv);
385		417
386	get_padlist (cv); /* this is a monster */	418	CvDEPTH (cv) = 0;
		419	get_padlist (aTHX_ cv);
387	}	420	}
388	}	421	}
389	else if (CxTYPE(cx) == CXt_FORMAT)
390	{
391	/* I never used formats, so how should I know how these are implemented? */
392	/* my bold guess is as a simple, plain sub... */
393	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394	}
395	}	422	}
396		423
397	if (top_si->si_type == PERLSI_MAIN)	424	if (top_si->si_type == PERLSI_MAIN)
398	break;	425	break;
399		426
400	top_si = top_si->si_prev;	427	top_si = top_si->si_prev;
401	ccstk = top_si->si_cxstack;	428	ccstk = top_si->si_cxstack;
402	cxix = top_si->si_cxix;	429	cxix = top_si->si_cxix;
403	}	430	}
404		431
405	PUTBACK;	432	PUTBACK;
406	}	433	}
407		434
408	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	435	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
409	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	436	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
410	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	437	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		438	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		439	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
411		440
412	c->dowarn = PL_dowarn;	441	#define VAR(name,type)c->name = PL_ ## name;
413	c->in_eval = PL_in_eval;	442	# include "state.h"
414		443	#undef VAR
415	c->curstackinfo = PL_curstackinfo;
416	c->curstack = PL_curstack;
417	c->mainstack = PL_mainstack;
418	c->stack_sp = PL_stack_sp;
419	c->op = PL_op;
420	c->curpad = PL_curpad;
421	c->stack_base = PL_stack_base;
422	c->stack_max = PL_stack_max;
423	c->tmps_stack = PL_tmps_stack;
424	c->tmps_floor = PL_tmps_floor;
425	c->tmps_ix = PL_tmps_ix;
426	c->tmps_max = PL_tmps_max;
427	c->markstack = PL_markstack;
428	c->markstack_ptr = PL_markstack_ptr;
429	c->markstack_max = PL_markstack_max;
430	c->scopestack = PL_scopestack;
431	c->scopestack_ix = PL_scopestack_ix;
432	c->scopestack_max = PL_scopestack_max;
433	c->savestack = PL_savestack;
434	c->savestack_ix = PL_savestack_ix;
435	c->savestack_max = PL_savestack_max;
436	c->retstack = PL_retstack;
437	c->retstack_ix = PL_retstack_ix;
438	c->retstack_max = PL_retstack_max;
439	c->curcop = PL_curcop;
440	c->top_env = PL_top_env;
441	}	444	}
442		445
443	/*	446	/*
444	* allocate various perl stacks. This is an exact copy	447	* allocate various perl stacks. This is an exact copy
445	* of perl.c:init_stacks, except that it uses less memory	448	* of perl.c:init_stacks, except that it uses less memory
446	* on the assumption that coroutines do not usually need	449	* on the (sometimes correct) assumption that coroutines do
447	* a lot of stackspace.	450	* not usually need a lot of stackspace.
448	*/	451	*/
449	STATIC void	452	#if CORO_PREFER_PERL_FUNCTIONS
		453	# define coro_init_stacks init_stacks
		454	#else
		455	static void
450	coro_init_stacks (pTHX)	456	coro_init_stacks (pTHX)
451	{	457	{
452	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	458	PL_curstackinfo = new_stackinfo(64, 6);
453	PL_curstackinfo->si_type = PERLSI_MAIN;	459	PL_curstackinfo->si_type = PERLSI_MAIN;
454	PL_curstack = PL_curstackinfo->si_stack;	460	PL_curstack = PL_curstackinfo->si_stack;
455	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	461	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
456		462
457	PL_stack_base = AvARRAY(PL_curstack);	463	PL_stack_base = AvARRAY(PL_curstack);
458	PL_stack_sp = PL_stack_base;	464	PL_stack_sp = PL_stack_base;
459	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	465	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
460		466
461	New(50,PL_tmps_stack,96,SV*);	467	New(50,PL_tmps_stack,64,SV*);
462	PL_tmps_floor = -1;	468	PL_tmps_floor = -1;
463	PL_tmps_ix = -1;	469	PL_tmps_ix = -1;
464	PL_tmps_max = 96;	470	PL_tmps_max = 64;
465		471
466	New(54,PL_markstack,16,I32);	472	New(54,PL_markstack,16,I32);
467	PL_markstack_ptr = PL_markstack;	473	PL_markstack_ptr = PL_markstack;
468	PL_markstack_max = PL_markstack + 16;	474	PL_markstack_max = PL_markstack + 16;
469		475
		476	#ifdef SET_MARK_OFFSET
470	SET_MARK_OFFSET;	477	SET_MARK_OFFSET;
		478	#endif
471		479
472	New(54,PL_scopestack,16,I32);	480	New(54,PL_scopestack,16,I32);
473	PL_scopestack_ix = 0;	481	PL_scopestack_ix = 0;
474	PL_scopestack_max = 16;	482	PL_scopestack_max = 16;
475		483
476	New(54,PL_savestack,96,ANY);	484	New(54,PL_savestack,64,ANY);
477	PL_savestack_ix = 0;	485	PL_savestack_ix = 0;
478	PL_savestack_max = 96;	486	PL_savestack_max = 64;
479		487
		488	#if !PERL_VERSION_ATLEAST (5,9,0)
480	New(54,PL_retstack,8,OP*);	489	New(54,PL_retstack,4,OP*);
481	PL_retstack_ix = 0;	490	PL_retstack_ix = 0;
482	PL_retstack_max = 8;	491	PL_retstack_max = 4;
		492	#endif
483	}	493	}
		494	#endif
484		495
485	/*	496	/*
486	* destroy the stacks, the callchain etc...	497	* destroy the stacks, the callchain etc...
487	* still there is a memleak of 128 bytes...
488	*/	498	*/
489	STATIC void	499	static void
490	destroy_stacks(pTHX)	500	coro_destroy_stacks (pTHX)
491	{	501	{
492	int destruct = PL_main_cv != Nullcv;	502	if (!IN_DESTRUCT)
493
494	if (destruct)
495	{	503	{
496	/* is this ugly, I ask? */	504	/* restore all saved variables and stuff */
497	while (PL_scopestack_ix)	505	LEAVE_SCOPE (0);
498	LEAVE;	506	assert (PL_tmps_floor == -1);
499		507
500	/* sure it is, but more important: is it correct?? :/ */	508	/* free all temporaries */
501	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
502	FREETMPS;	509	FREETMPS;
		510	assert (PL_tmps_ix == -1);
		511
		512	/* unwind all extra stacks */
		513	POPSTACK_TO (PL_mainstack);
		514
		515	/* unwind main stack */
		516	dounwind (-1);
503	}	517	}
504		518
505	while (PL_curstackinfo->si_next)	519	while (PL_curstackinfo->si_next)
506	PL_curstackinfo = PL_curstackinfo->si_next;	520	PL_curstackinfo = PL_curstackinfo->si_next;
507		521
508	while (PL_curstackinfo)	522	while (PL_curstackinfo)
509	{	523	{
510	PERL_SI *p = PL_curstackinfo->si_prev;	524	PERL_SI *p = PL_curstackinfo->si_prev;
511		525
512	{	526	if (!IN_DESTRUCT)
513	dSP;
514	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
515	PUTBACK; /* possibly superfluous */
516	}
517
518	if (destruct)
519	{
520	dounwind(-1);
521	SvREFCNT_dec(PL_curstackinfo->si_stack);	527	SvREFCNT_dec (PL_curstackinfo->si_stack);
522	}
523		528
524	Safefree(PL_curstackinfo->si_cxstack);	529	Safefree (PL_curstackinfo->si_cxstack);
525	Safefree(PL_curstackinfo);	530	Safefree (PL_curstackinfo);
526	PL_curstackinfo = p;	531	PL_curstackinfo = p;
527	}	532	}
528		533
529	Safefree(PL_tmps_stack);	534	Safefree (PL_tmps_stack);
530	Safefree(PL_markstack);	535	Safefree (PL_markstack);
531	Safefree(PL_scopestack);	536	Safefree (PL_scopestack);
532	Safefree(PL_savestack);	537	Safefree (PL_savestack);
		538	#if !PERL_VERSION_ATLEAST (5,9,0)
533	Safefree(PL_retstack);	539	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	540	#endif
		541	}
		542
		543	static size_t
		544	coro_rss (struct coro *coro)
		545	{
		546	size_t rss = sizeof (coro);
		547
		548	if (coro->mainstack)
		549	{
		550	if (coro->flags & CF_RUNNING)
553	{	551	{
554	/FIXME//D//* reasonable stack size! */	552	#define VAR(name,type)coro->name = PL_ ## name;
555	stack->ssize = -4096 * sizeof (long);	553	# include "state.h"
556	New (0, stack->sptr, 4096, long);	554	#undef VAR
557	}	555	}
558	}
559	else
560	stack->sptr = 0;
561		556
562	ctx->stack = stack;	557	rss += sizeof (coro->curstackinfo);
563	}	558	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		559	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		560	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		561	rss += coro->tmps_max * sizeof (SV *);
		562	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		563	rss += coro->scopestack_max * sizeof (I32);
		564	rss += coro->savestack_max * sizeof (ANY);
564		565
565	static void	566	#if !PERL_VERSION_ATLEAST (5,9,0)
566	deallocate_stack (Coro__State ctx)	567	rss += coro->retstack_max * sizeof (OP *);
567	{	568	#endif
568	coro_stack *stack = ctx->stack;
569
570	ctx->stack = 0;
571
572	if (stack)
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	}
		845
		846	prev__cctx = prev->cctx;
		847
		848	/* possibly "free" the cctx */
		849	if (prev__cctx->idle_sp == STACKLEVEL)
		850	{
		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)
749	}	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 */
750		906
751	/*	907	if (coro->mainstack && coro->mainstack != main_mainstack)
752	* xnext is now either prev or next, depending on wether	908	{
753	* we switched the c stack or not. that's why i use a global	909	struct coro temp;
754	* variable, that should become thread-specific at one point.	910
755	*/	911	assert (!(coro->flags & CF_RUNNING));
756	xnext->cursp = stacklevel;	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 == coro_first) coro_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) && SvSTASH(SvRV(arg)) == coro_state_stash)
774	return (struct coro ) SvIV((SV)SvRV(arg));
775		993
776	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	994	mg = CORO_MAGIC (coro);
777	/NORETURN/	995	return (struct coro *)mg->mg_ptr;
778	}	996	}
779		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
780	static void	1017	static int
781	api_transfer(pTHX_ SV prev, SV next, int flags)	1018	api_save (SV *coro_sv, int new_save)
782	{	1019	{
783	transfer(aTHX_	1020	dTHX;
784	sv_to_coro (prev, "Coro::transfer", "prev"),	1021	struct coro *coro = SvSTATE (coro_sv);
785	sv_to_coro (next, "Coro::transfer", "next"),	1022	int old_save = coro->save;
786	flags);	1023
		1024	if (new_save >= 0)
		1025	coro->save = new_save;
		1026
		1027	return old_save;
787	}	1028	}
788		1029
789	/ Coro ******************************************************************/	1030	/ Coro ******************************************************************/
790		1031
791	#define PRIO_MAX 3
792	#define PRIO_HIGH 1
793	#define PRIO_NORMAL 0
794	#define PRIO_LOW -1
795	#define PRIO_IDLE -3
796	#define PRIO_MIN -4
797
798	/* for Coro.pm */
799	static GV coro_current, coro_idle;
800	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
801	static int coro_nready;
802
803	static void	1032	static void
804	coro_enq (SV *sv)	1033	coro_enq (pTHX_ SV *coro_sv)
805	{	1034	{
806	if (SvROK (sv))	1035	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
807	{
808	SV *hv = SvRV (sv);
809	if (SvTYPE (hv) == SVt_PVHV)
810	{
811	SV *xprio = hv_fetch ((HV )hv, "prio", 4, 0);
812	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
813
814	prio = prio > PRIO_MAX ? PRIO_MAX
815	: prio < PRIO_MIN ? PRIO_MIN
816	: prio;
817
818	av_push (coro_ready [prio - PRIO_MIN], sv);
819	coro_nready++;
820
821	return;
822	}
823	}
824
825	croak ("Coro::ready tried to enqueue something that is not a coroutine");
826	}	1036	}
827		1037
828	static SV *	1038	static SV *
829	coro_deq (int min_prio)	1039	coro_deq (pTHX_ int min_prio)
830	{	1040	{
831	int prio = PRIO_MAX - PRIO_MIN;	1041	int prio = PRIO_MAX - PRIO_MIN;
832		1042
833	min_prio -= PRIO_MIN;	1043	min_prio -= PRIO_MIN;
834	if (min_prio < 0)	1044	if (min_prio < 0)
835	min_prio = 0;	1045	min_prio = 0;
836		1046
837	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1047	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
838	if (av_len (coro_ready[prio]) >= 0)	1048	if (AvFILLp (coro_ready [prio]) >= 0)
839	{
840	coro_nready--;
841	return av_shift (coro_ready[prio]);	1049	return av_shift (coro_ready [prio]);
842	}
843		1050
844	return 0;	1051	return 0;
845	}	1052	}
846		1053
847	static void	1054	static int
848	api_ready (SV *coro)	1055	api_ready (SV *coro_sv)
849	{	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;
850	coro_enq (SvREFCNT_inc (coro));	1071	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
851	}	1072	++coro_nready;
		1073	UNLOCK;
852		1074
		1075	return 1;
		1076	}
		1077
853	static void	1078	static int
854	api_schedule (int cede)	1079	api_is_ready (SV *coro_sv)
855	{	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	{
856	SV prev, next;	1088	SV prev_sv, next_sv;
857		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 */
858	prev = GvSV (coro_current);	1130	prev_sv = SvRV (coro_current);
		1131	SvRV_set (coro_current, next_sv);
		1132	ta->prev = SvSTATE (prev_sv);
859		1133
860	if (cede)	1134	assert (ta->next->flags & CF_READY);
861	coro_enq (SvREFCNT_inc (prev));	1135	ta->next->flags &= ~CF_READY;
862		1136
863	next = coro_deq (PRIO_MIN);	1137	LOCK;
		1138	free_coro_mortal (aTHX);
		1139	coro_mortal = prev_sv;
		1140	UNLOCK;
		1141	}
864		1142
865	if (!next)	1143	static void
866	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	}
867		1149
868	GvSV (coro_current) = SvREFCNT_inc (next);	1150	static int
869	transfer (aTHX_	1151	prepare_cede_notself (pTHX_ struct transfer_args *ta)
870	sv_to_coro (prev, "Coro::schedule", "current coroutine"),	1152	{
871	sv_to_coro (next, "Coro::schedule", "next coroutine"),	1153	if (coro_nready)
872	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);	1154	{
873	SvREFCNT_dec (next);	1155	SV *prev = SvRV (coro_current);
874	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;
875	}	1204	}
876		1205
877	MODULE = Coro::State PACKAGE = Coro::State	1206	MODULE = Coro::State PACKAGE = Coro::State
878		1207
879	PROTOTYPES: ENABLE	1208	PROTOTYPES: DISABLE
880		1209
881	BOOT:	1210	BOOT:
882	{ /* {} necessary for stoopid perl-5.6.x */	1211	{
883	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1212	#ifdef USE_ITHREADS
884	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1213	MUTEX_INIT (&coro_mutex);
		1214	#endif
		1215	BOOT_PAGESIZE;
		1216
885	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1217	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
886		1218
887	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1219	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
888	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1220	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
889	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));
890	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1224	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
891		1225	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
892	if (!padlist_cache)
893	padlist_cache = newHV ();
894		1226
895	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;
896		1232
897	coroapi.ver = CORO_API_VERSION;	1233	coroapi.ver = CORO_API_VERSION;
898	coroapi.transfer = api_transfer;	1234	coroapi.transfer = api_transfer;
899	}
900		1235
901	Coro::State	1236	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
902	_newprocess(args)	1237	}
903	SV * args	1238
904	PROTOTYPE: $	1239	SV *
		1240	new (char *klass, ...)
905	CODE:	1241	CODE:
906	Coro__State coro;	1242	{
		1243	struct coro *coro;
		1244	HV *hv;
		1245	int i;
907		1246
908	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
909	croak ("Coro::State::_newprocess expects an arrayref");
910
911	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;
912		1251
913	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1252	if (coro_first) coro_first->prev = coro;
914	coro->mainstack = 0; /* actual work is done inside transfer */	1253	coro->next = coro_first;
915	coro->stack = 0;	1254	coro_first = coro;
916		1255
917	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	}
918	OUTPUT:	1263	OUTPUT:
919	RETVAL	1264	RETVAL
920		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
921	void	1284	void
922	transfer(prev, next, flags)	1285	_set_stacklevel (...)
923	Coro::State_or_hashref prev	1286	ALIAS:
924	Coro::State_or_hashref next	1287	Coro::State::transfer = 1
925	int flags	1288	Coro::schedule = 2
926	PROTOTYPE: @	1289	Coro::cede = 3
		1290	Coro::cede_notself = 4
927	CODE:	1291	CODE:
928	PUTBACK;	1292	{
929	transfer (aTHX_ prev, next, flags);	1293	struct transfer_args ta;
930	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
931		1337
932	void	1338	void
933	DESTROY(coro)
934	Coro::State coro
935	CODE:
936
937	if (coro->mainstack && coro->mainstack != main_mainstack)
938	{
939	struct coro temp;
940
941	PUTBACK;
942	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
943	LOAD(aTHX_ coro);
944	SPAGAIN;
945
946	destroy_stacks (aTHX);
947
948	LOAD((&temp)); /* this will get rid of defsv etc.. */
949	SPAGAIN;
950
951	coro->mainstack = 0;
952	}
953
954	deallocate_stack (coro);
955
956	Safefree (coro);
957
958	void
959	flush()
960	CODE:
961	#ifdef MAY_FLUSH
962	flush_padlist_cache ();
963	#endif
964
965	void
966	_exit(code)	1339	_exit (code)
967	int code	1340	int code
968	PROTOTYPE: $	1341	PROTOTYPE: $
969	CODE:	1342	CODE:
970	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
971	_exit (code);	1343	_exit (code);
972	#else
973	signal (SIGTERM, SIG_DFL);
974	raise (SIGTERM);
975	exit (code);
976	#endif
977		1344
978	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
979		1353
980	# 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
981		1367
982	void	1368	void
983	yield(...)	1369	list ()
984	PROTOTYPE: @	1370	PPCODE:
		1371	{
		1372	struct coro *coro;
		1373	for (coro = 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: $
985	CODE:	1431	CODE:
986	static SV *returnstk;	1432	RETVAL = coro_rss (coro);
987	SV *sv;	1433	OUTPUT:
988	AV *defav = GvAV (PL_defgv);	1434	RETVAL
989	struct coro prev, next;
990		1435
991	if (!returnstk)
992	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
993
994	/* set up @_ -- ugly */
995	av_clear (defav);
996	av_fill (defav, items - 1);
997	while (items--)
998	av_store (defav, items, SvREFCNT_inc (ST(items)));
999
1000	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1001	sv = av_pop ((AV *)SvRV (returnstk));
1002	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
1003	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
1004	SvREFCNT_dec (sv);
1005
1006	transfer(aTHX_ prev, next, 0);
1007		1436
1008	MODULE = Coro::State PACKAGE = Coro	1437	MODULE = Coro::State PACKAGE = Coro
1009		1438
1010	# this is slightly dirty (should expose a c-level api)
1011
1012	BOOT:	1439	BOOT:
1013	{	1440	{
1014	int i;	1441	int i;
		1442
1015	HV *stash = gv_stashpv ("Coro", TRUE);	1443	coro_stash = gv_stashpv ("Coro", TRUE);
1016		1444
1017	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1445	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1018	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1446	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1019	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1447	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1020	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1448	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1021	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1449	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1022	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1450	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1023		1451
1024	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1452	coro_current = get_sv ("Coro::current", FALSE);
1025	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1453	SvREADONLY_on (coro_current);
1026		1454
1027	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1455	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1028	coro_ready[i] = newAV ();	1456	coro_ready[i] = newAV ();
1029		1457
1030	{	1458	{
1031	SV *sv = perl_get_sv("Coro::API", 1);	1459	SV *sv = perl_get_sv("Coro::API", 1);
1032		1460
1033	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;
1034	coroapi.ready = api_ready;	1465	coroapi.ready = api_ready;
		1466	coroapi.is_ready = api_is_ready;
1035	coroapi.nready = &coro_nready;	1467	coroapi.nready = &coro_nready;
1036	coroapi.current = coro_current;	1468	coroapi.current = coro_current;
1037		1469
1038	GCoroAPI = &coroapi;	1470	GCoroAPI = &coroapi;
1039	sv_setiv(sv, (IV)&coroapi);	1471	sv_setiv (sv, (IV)&coroapi);
1040	SvREADONLY_on(sv);	1472	SvREADONLY_on (sv);
1041	}	1473	}
1042	}	1474	}
1043		1475
1044	void	1476	void
1045	ready(self)	1477	_set_current (SV *current)
1046	SV * self	1478	PROTOTYPE: $
1047	CODE:	1479	CODE:
1048	api_ready (self);	1480	SvREFCNT_dec (SvRV (coro_current));
		1481	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1049		1482
1050	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
1051	nready(...)	1514	nready (...)
1052	PROTOTYPE:	1515	PROTOTYPE:
1053	CODE:	1516	CODE:
1054	RETVAL = coro_nready;	1517	RETVAL = coro_nready;
1055	OUTPUT:	1518	OUTPUT:
1056	RETVAL	1519	RETVAL
1057		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
1058	void	1542	void
1059	schedule(...)	1543	_set_state (char *data_)
1060	PROTOTYPE:	1544	PROTOTYPE: $
1061	ALIAS:
1062	cede = 1
1063	CODE:	1545	CODE:
1064	api_schedule (ix);	1546	{
		1547	struct io_state data = (void )data_;
1065		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 1.32 by root, Sun Aug 26 17:01:54 2001 UTC vs. Revision 1.158 by root, Fri Sep 21 02:23:48 2007 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.32 by root, Sun Aug 26 17:01:54 2001 UTC vs.
Revision 1.158 by root, Fri Sep 21 02:23:48 2007 UTC