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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.38 by root, Wed Nov 7 00:21:06 2001 UTC vs.
Revision 1.165 by root, Wed Sep 26 19:26:48 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_ANONYMOUS	18	# ifndef MAP_ANONYMOUS
14	# define MAP_ANONYMOUS 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 IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
32		99
33	#define labs(l) ((l) >= 0 ? (l) : -(l))	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))
34		109
35	#include "CoroAPI.h"	110	#include "CoroAPI.h"
36		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;
37	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 */
38		136
39	/* this is actually not only the c stack but also c registers etc... */	137	/* async_pool helper stuff */
		138	static SV *sv_pool_rss;
		139	static SV *sv_pool_size;
		140	static AV *av_async_pool;
		141
		142	static struct coro_cctx *cctx_first;
		143	static int cctx_count, cctx_idle;
		144
		145	enum {
		146	CC_MAPPED = 0x01,
		147	CC_TRACE = 0x02,
		148	CC_NOREUSE = 0x04, /* throw this away after tracing */
		149	};
		150
		151	/* this is a structure representing a c-level coroutine */
40	typedef struct {	152	typedef struct coro_cctx {
41	int refcnt; /* pointer reference counter */	153	struct coro_cctx *next;
42	int usecnt; /* shared by how many coroutines */
43	int gencnt; /* generation counter */
44		154
		155	/* the stack */
		156	void *sptr;
		157	size_t ssize;
		158
		159	/* cpu state */
		160	void idle_sp; / sp of top-level transfer/schedule/cede call */
		161	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		162	JMPENV *top_env;
45	coro_context cctx;	163	coro_context cctx;
46		164
47	void *sptr;	165	#if CORO_USE_VALGRIND
48	long ssize; /* positive == mmap, otherwise malloc */	166	int valgrind_id;
49	} coro_stack;	167	#endif
		168	unsigned char flags;
		169	} coro_cctx;
50		170
		171	enum {
		172	CF_RUNNING = 0x0001, /* coroutine is running */
		173	CF_READY = 0x0002, /* coroutine is ready */
		174	CF_NEW = 0x0004, /* has never been switched to */
		175	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		176	};
		177
		178	/* this is a structure representing a perl-level coroutine */
51	struct coro {	179	struct coro {
52	/* the optional C context */	180	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	181	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	/* TODO: PL_pmop might be nice && effortless to save. */
62
63	/* saved global state not related to stacks */
64	U8 dowarn;
65	I32 in_eval;
66
67	/* the stacks and related info (callchain etc..) */
68	PERL_SI *curstackinfo;
69	AV *curstack;
70	AV *mainstack;
71	SV **stack_sp;
72	OP *op;
73	SV **curpad;
74	SV **stack_base;
75	SV **stack_max;
76	SV **tmps_stack;
77	I32 tmps_floor;
78	I32 tmps_ix;
79	I32 tmps_max;
80	I32 *markstack;
81	I32 *markstack_ptr;
82	I32 *markstack_max;
83	I32 *scopestack;
84	I32 scopestack_ix;
85	I32 scopestack_max;
86	ANY *savestack;
87	I32 savestack_ix;
88	I32 savestack_max;
89	OP **retstack;
90	I32 retstack_ix;
91	I32 retstack_max;
92	COP *curcop;
93	JMPENV *top_env;
94		182
95	/* data associated with this coroutine (initial args) */	183	/* data associated with this coroutine (initial args) */
96	AV *args;	184	AV *args;
		185	int refcnt;
		186	int save; /* CORO_SAVE flags */
		187	int flags; /* CF_ flags */
		188
		189	/* optionally saved, might be zero */
		190	AV defav; / @_ */
		191	SV defsv; / $_ */
		192	SV errsv; / $@ */
		193	GV deffh; / default filehandle */
		194	SV irssv; / $/ */
		195	SV irssv_sv; / real $/ cache */
		196
		197	#define VAR(name,type) type name;
		198	# include "state.h"
		199	#undef VAR
		200
		201	/* coro process data */
		202	int prio;
		203
		204	/* linked list */
		205	struct coro next, prev;
		206	HV hv; / the perl hash associated with this coro, if any */
97	};	207	};
98		208
99	typedef struct coro *Coro__State;	209	typedef struct coro *Coro__State;
100	typedef struct coro *Coro__State_or_hashref;	210	typedef struct coro *Coro__State_or_hashref;
101		211
102	static AV main_mainstack; / used to differentiate between $main and others */	212	/ Coro ******************************************************************/
103	static HV *coro_state_stash;
104	static SV *ucoro_state_sv;
105	static U32 ucoro_state_hash;
106	static HV *padlist_cache;
107		213
108	/* mostly copied from op.c:cv_clone2 */	214	#define PRIO_MAX 3
109	STATIC AV *	215	#define PRIO_HIGH 1
110	clone_padlist (AV *protopadlist)	216	#define PRIO_NORMAL 0
		217	#define PRIO_LOW -1
		218	#define PRIO_IDLE -3
		219	#define PRIO_MIN -4
		220
		221	/* for Coro.pm */
		222	static SV *coro_current;
		223	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		224	static int coro_nready;
		225	static struct coro *coro_first;
		226
		227	/ lowlevel stuff ********************************************************/
		228
		229	static AV *
		230	coro_clone_padlist (pTHX_ CV *cv)
111	{	231	{
112	AV *av;	232	AV *padlist = CvPADLIST (cv);
113	I32 ix;
114	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
115	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
116	SV **pname = AvARRAY (protopad_name);
117	SV **ppad = AvARRAY (protopad);
118	I32 fname = AvFILLp (protopad_name);
119	I32 fpad = AvFILLp (protopad);
120	AV newpadlist, newpad_name, *newpad;	233	AV newpadlist, newpad;
121	SV **npad;
122
123	newpad_name = newAV ();
124	for (ix = fname; ix >= 0; ix--)
125	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
126
127	newpad = newAV ();
128	av_fill (newpad, AvFILLp (protopad));
129	npad = AvARRAY (newpad);
130		234
131	newpadlist = newAV ();	235	newpadlist = newAV ();
132	AvREAL_off (newpadlist);	236	AvREAL_off (newpadlist);
133	av_store (newpadlist, 0, (SV *) newpad_name);	237	#if PERL_VERSION_ATLEAST (5,9,0)
		238	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		239	#else
		240	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		241	#endif
		242	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		243	--AvFILLp (padlist);
		244
		245	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
134	av_store (newpadlist, 1, (SV *) newpad);	246	av_store (newpadlist, 1, (SV *)newpad);
135		247
136	av = newAV (); /* will be @_ */	248	return newpadlist;
137	av_extend (av, 0);	249	}
138	av_store (newpad, 0, (SV *) av);
139	AvFLAGS (av) = AVf_REIFY;
140		250
141	for (ix = fpad; ix > 0; ix--)	251	static void
		252	free_padlist (pTHX_ AV *padlist)
		253	{
		254	/* may be during global destruction */
		255	if (SvREFCNT (padlist))
142	{	256	{
143	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	257	I32 i = AvFILLp (padlist);
144	if (namesv && namesv != &PL_sv_undef)	258	while (i >= 0)
145	{	259	{
146	char name = SvPVX (namesv); / XXX */	260	SV **svp = av_fetch (padlist, i--, FALSE);
147	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')	261	if (svp)
148	{ /* lexical from outside? */
149	npad[ix] = SvREFCNT_inc (ppad[ix]);
150	}	262	{
151	else
152	{ /* our own lexical */
153	SV *sv;	263	SV *sv;
154	if (*name == '&')	264	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
155	sv = SvREFCNT_inc (ppad[ix]);	265	SvREFCNT_dec (sv);
156	else if (*name == '@')	266
157	sv = (SV *) newAV ();	267	SvREFCNT_dec (*svp);
158	else if (*name == '%')
159	sv = (SV *) newHV ();
160	else
161	sv = NEWSV (0, 0);
162	if (!SvPADBUSY (sv))
163	SvPADMY_on (sv);
164	npad[ix] = sv;
165	}	268	}
166	}	269	}
167	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))	270
		271	SvREFCNT_dec ((SV*)padlist);
		272	}
		273	}
		274
		275	static int
		276	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		277	{
		278	AV *padlist;
		279	AV av = (AV )mg->mg_obj;
		280
		281	/* casting is fun. */
		282	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		283	free_padlist (aTHX_ padlist);
		284
		285	SvREFCNT_dec (av);
		286
		287	return 0;
		288	}
		289
		290	#define PERL_MAGIC_coro PERL_MAGIC_ext
		291
		292	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		293
		294	#define CORO_MAGIC(cv) \
		295	SvMAGIC (cv) \
		296	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		297	? SvMAGIC (cv) \
		298	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		299	: 0
		300
		301	/* the next two functions merely cache the padlists */
		302	static void
		303	get_padlist (pTHX_ CV *cv)
		304	{
		305	MAGIC *mg = CORO_MAGIC (cv);
		306	AV *av;
		307
		308	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
		309	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
		310	else
		311	{
		312	#if CORO_PREFER_PERL_FUNCTIONS
		313	/* this is probably cleaner, but also slower? */
		314	CV *cp = Perl_cv_clone (cv);
		315	CvPADLIST (cv) = CvPADLIST (cp);
		316	CvPADLIST (cp) = 0;
		317	SvREFCNT_dec (cp);
		318	#else
		319	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		320	#endif
		321	}
		322	}
		323
		324	static void
		325	put_padlist (pTHX_ CV *cv)
		326	{
		327	MAGIC *mg = CORO_MAGIC (cv);
		328	AV *av;
		329
		330	if (!mg)
		331	{
		332	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		333	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		334	mg->mg_virtual = &vtbl_coro;
		335	mg->mg_obj = (SV *)newAV ();
		336	}
		337
		338	av = (AV *)mg->mg_obj;
		339
		340	if (AvFILLp (av) >= AvMAX (av))
		341	av_extend (av, AvMAX (av) + 1);
		342
		343	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
		344	}
		345
		346	/ load & save, init *****************************************************/
		347
		348	#define SB do {
		349	#define SE } while (0)
		350
		351	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
		352
		353	static void
		354	load_perl (pTHX_ Coro__State c)
		355	{
		356	#define VAR(name,type) PL_ ## name = c->name;
		357	# include "state.h"
		358	#undef VAR
		359
		360	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
		361	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
		362	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		363	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		364
		365	if (c->irssv)
		366	{
		367	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
168	{	368	{
169	npad[ix] = SvREFCNT_inc (ppad[ix]);	369	SvREFCNT_dec (c->irssv);
		370	c->irssv = 0;
170	}	371	}
171	else	372	else
172	{	373	{
173	SV *sv = NEWSV (0, 0);	374	REPLACE_SV (PL_rs, c->irssv);
174	SvPADTMP_on (sv);	375	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
175	npad[ix] = sv;	376	sv_setsv (c->irssv_sv, PL_rs);
176	}	377	}
177	}	378	}
178
179	#if 0 /* return -ENOTUNDERSTOOD */
180	/* Now that vars are all in place, clone nested closures. */
181
182	for (ix = fpad; ix > 0; ix--) {
183	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
184	if (namesv
185	&& namesv != &PL_sv_undef
186	&& !(SvFLAGS(namesv) & SVf_FAKE)
187	&& *SvPVX(namesv) == '&'
188	&& CvCLONE(ppad[ix]))
189	{
190	CV kid = cv_clone((CV)ppad[ix]);
191	SvREFCNT_dec(ppad[ix]);
192	CvCLONE_on(kid);
193	SvPADMY_on(kid);
194	npad[ix] = (SV*)kid;
195	}
196	}
197	#endif
198
199	return newpadlist;
200	}
201
202	#ifdef MAY_FLUSH
203	STATIC void
204	free_padlist (AV *padlist)
205	{
206	/* may be during global destruction */
207	if (SvREFCNT(padlist))
208	{
209	I32 i = AvFILLp(padlist);
210	while (i >= 0)
211	{
212	SV **svp = av_fetch(padlist, i--, FALSE);
213	SV sv = svp ? svp : Nullsv;
214	if (sv)
215	SvREFCNT_dec(sv);
216	}
217
218	SvREFCNT_dec((SV*)padlist);
219	}
220	}
221	#endif
222
223	/* the next two functions merely cache the padlists */
224	STATIC void
225	get_padlist (CV *cv)
226	{
227	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);
228
229	if (he && AvFILLp ((AV )he) >= 0)
230	CvPADLIST (cv) = (AV )av_pop ((AV )*he);
231	else
232	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
233	}
234
235	STATIC void
236	put_padlist (CV *cv)
237	{
238	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);
239
240	if (SvTYPE (*he) != SVt_PVAV)
241	{
242	SvREFCNT_dec (*he);
243	he = (SV )newAV ();
244	}
245
246	av_push ((AV )he, (SV *)CvPADLIST (cv));
247	}
248
249	#ifdef MAY_FLUSH
250	STATIC void
251	flush_padlist_cache ()
252	{
253	HV *hv = padlist_cache;
254	padlist_cache = newHV ();
255
256	if (hv_iterinit (hv))
257	{
258	HE *he;
259	AV *padlist;
260
261	while (!!(he = hv_iternext (hv)))
262	{
263	AV av = (AV )HeVAL(he);
264
265	/* casting is fun. */
266	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
267	free_padlist (padlist);
268	}
269	}
270
271	SvREFCNT_dec (hv);
272	}
273	#endif
274
275	#define SB do {
276	#define SE } while (0)
277
278	#define LOAD(state) load_state(aTHX_ (state));
279	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
280
281	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE
282
283	static void
284	load_state(pTHX_ Coro__State c)
285	{
286	PL_dowarn = c->dowarn;
287	PL_in_eval = c->in_eval;
288
289	PL_curstackinfo = c->curstackinfo;
290	PL_curstack = c->curstack;
291	PL_mainstack = c->mainstack;
292	PL_stack_sp = c->stack_sp;
293	PL_op = c->op;
294	PL_curpad = c->curpad;
295	PL_stack_base = c->stack_base;
296	PL_stack_max = c->stack_max;
297	PL_tmps_stack = c->tmps_stack;
298	PL_tmps_floor = c->tmps_floor;
299	PL_tmps_ix = c->tmps_ix;
300	PL_tmps_max = c->tmps_max;
301	PL_markstack = c->markstack;
302	PL_markstack_ptr = c->markstack_ptr;
303	PL_markstack_max = c->markstack_max;
304	PL_scopestack = c->scopestack;
305	PL_scopestack_ix = c->scopestack_ix;
306	PL_scopestack_max = c->scopestack_max;
307	PL_savestack = c->savestack;
308	PL_savestack_ix = c->savestack_ix;
309	PL_savestack_max = c->savestack_max;
310	PL_retstack = c->retstack;
311	PL_retstack_ix = c->retstack_ix;
312	PL_retstack_max = c->retstack_max;
313	PL_curcop = c->curcop;
314	PL_top_env = c->top_env;
315
316	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
317	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
318	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
319		379
320	{	380	{
321	dSP;	381	dSP;
322	CV *cv;	382	CV *cv;
323		383
324	/* now do the ugly restore mess */	384	/* now do the ugly restore mess */
325	while ((cv = (CV *)POPs))	385	while ((cv = (CV *)POPs))
326	{	386	{
327	AV padlist = (AV )POPs;
328
329	if (padlist)
330	{
331	put_padlist (cv); /* mark this padlist as available */	387	put_padlist (aTHX_ cv); /* mark this padlist as available */
332	CvPADLIST(cv) = padlist;	388	CvDEPTH (cv) = PTR2IV (POPs);
333	#ifdef USE_THREADS	389	CvPADLIST (cv) = (AV *)POPs;
334	/CvOWNER(cv) = (struct perl_thread )POPs;*/
335	#endif
336	}
337
338	++CvDEPTH(cv);
339	}	390	}
340		391
341	PUTBACK;	392	PUTBACK;
342	}	393	}
343	}	394	}
344		395
345	static void	396	static void
346	save_state(pTHX_ Coro__State c, int flags)	397	save_perl (pTHX_ Coro__State c)
347	{	398	{
348	{	399	{
349	dSP;	400	dSP;
350	I32 cxix = cxstack_ix;	401	I32 cxix = cxstack_ix;
351	PERL_CONTEXT *ccstk = cxstack;	402	PERL_CONTEXT *ccstk = cxstack;
…		…
354	/*	405	/*
355	* the worst thing you can imagine happens first - we have to save	406	* the worst thing you can imagine happens first - we have to save
356	* (and reinitialize) all cv's in the whole callchain :(	407	* (and reinitialize) all cv's in the whole callchain :(
357	*/	408	*/
358		409
359	PUSHs (Nullsv);	410	XPUSHs (Nullsv);
360	/* this loop was inspired by pp_caller */	411	/* this loop was inspired by pp_caller */
361	for (;;)	412	for (;;)
362	{	413	{
363	while (cxix >= 0)	414	while (cxix >= 0)
364	{	415	{
365	PERL_CONTEXT *cx = &ccstk[cxix--];	416	PERL_CONTEXT *cx = &ccstk[cxix--];
366		417
367	if (CxTYPE(cx) == CXt_SUB)	418	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
368	{	419	{
369	CV *cv = cx->blk_sub.cv;	420	CV *cv = cx->blk_sub.cv;
		421
370	if (CvDEPTH(cv))	422	if (CvDEPTH (cv))
371	{	423	{
372	#ifdef USE_THREADS
373	/XPUSHs ((SV )CvOWNER(cv));*/
374	/CvOWNER(cv) = 0;/
375	/error must unlock this cv etc.. etc.../
376	#endif
377	EXTEND (SP, CvDEPTH(cv)*2);	424	EXTEND (SP, 3);
378
379	while (--CvDEPTH(cv))
380	{
381	/* this tells the restore code to increment CvDEPTH */
382	PUSHs (Nullsv);
383	PUSHs ((SV *)cv);
384	}
385
386	PUSHs ((SV *)CvPADLIST(cv));	425	PUSHs ((SV *)CvPADLIST (cv));
		426	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
387	PUSHs ((SV *)cv);	427	PUSHs ((SV *)cv);
388		428
389	get_padlist (cv); /* this is a monster */	429	CvDEPTH (cv) = 0;
		430	get_padlist (aTHX_ cv);
390	}	431	}
391	}	432	}
392	else if (CxTYPE(cx) == CXt_FORMAT)
393	{
394	/* I never used formats, so how should I know how these are implemented? */
395	/* my bold guess is as a simple, plain sub... */
396	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
397	}
398	}	433	}
399		434
400	if (top_si->si_type == PERLSI_MAIN)	435	if (top_si->si_type == PERLSI_MAIN)
401	break;	436	break;
402		437
403	top_si = top_si->si_prev;	438	top_si = top_si->si_prev;
404	ccstk = top_si->si_cxstack;	439	ccstk = top_si->si_cxstack;
405	cxix = top_si->si_cxix;	440	cxix = top_si->si_cxix;
406	}	441	}
407		442
408	PUTBACK;	443	PUTBACK;
409	}	444	}
410		445
411	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	446	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
412	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	447	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
413	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	448	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		449	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		450	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
414		451
415	c->dowarn = PL_dowarn;	452	#define VAR(name,type)c->name = PL_ ## name;
416	c->in_eval = PL_in_eval;	453	# include "state.h"
417		454	#undef VAR
418	c->curstackinfo = PL_curstackinfo;
419	c->curstack = PL_curstack;
420	c->mainstack = PL_mainstack;
421	c->stack_sp = PL_stack_sp;
422	c->op = PL_op;
423	c->curpad = PL_curpad;
424	c->stack_base = PL_stack_base;
425	c->stack_max = PL_stack_max;
426	c->tmps_stack = PL_tmps_stack;
427	c->tmps_floor = PL_tmps_floor;
428	c->tmps_ix = PL_tmps_ix;
429	c->tmps_max = PL_tmps_max;
430	c->markstack = PL_markstack;
431	c->markstack_ptr = PL_markstack_ptr;
432	c->markstack_max = PL_markstack_max;
433	c->scopestack = PL_scopestack;
434	c->scopestack_ix = PL_scopestack_ix;
435	c->scopestack_max = PL_scopestack_max;
436	c->savestack = PL_savestack;
437	c->savestack_ix = PL_savestack_ix;
438	c->savestack_max = PL_savestack_max;
439	c->retstack = PL_retstack;
440	c->retstack_ix = PL_retstack_ix;
441	c->retstack_max = PL_retstack_max;
442	c->curcop = PL_curcop;
443	c->top_env = PL_top_env;
444	}	455	}
445		456
446	/*	457	/*
447	* allocate various perl stacks. This is an exact copy	458	* allocate various perl stacks. This is an exact copy
448	* of perl.c:init_stacks, except that it uses less memory	459	* of perl.c:init_stacks, except that it uses less memory
449	* on the assumption that coroutines do not usually need	460	* on the (sometimes correct) assumption that coroutines do
450	* a lot of stackspace.	461	* not usually need a lot of stackspace.
451	*/	462	*/
452	STATIC void	463	#if CORO_PREFER_PERL_FUNCTIONS
		464	# define coro_init_stacks init_stacks
		465	#else
		466	static void
453	coro_init_stacks (pTHX)	467	coro_init_stacks (pTHX)
454	{	468	{
455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	469	PL_curstackinfo = new_stackinfo(64, 6);
456	PL_curstackinfo->si_type = PERLSI_MAIN;	470	PL_curstackinfo->si_type = PERLSI_MAIN;
457	PL_curstack = PL_curstackinfo->si_stack;	471	PL_curstack = PL_curstackinfo->si_stack;
458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	472	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459		473
460	PL_stack_base = AvARRAY(PL_curstack);	474	PL_stack_base = AvARRAY(PL_curstack);
461	PL_stack_sp = PL_stack_base;	475	PL_stack_sp = PL_stack_base;
462	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	476	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463		477
464	New(50,PL_tmps_stack,96,SV*);	478	New(50,PL_tmps_stack,64,SV*);
465	PL_tmps_floor = -1;	479	PL_tmps_floor = -1;
466	PL_tmps_ix = -1;	480	PL_tmps_ix = -1;
467	PL_tmps_max = 96;	481	PL_tmps_max = 64;
468		482
469	New(54,PL_markstack,16,I32);	483	New(54,PL_markstack,16,I32);
470	PL_markstack_ptr = PL_markstack;	484	PL_markstack_ptr = PL_markstack;
471	PL_markstack_max = PL_markstack + 16;	485	PL_markstack_max = PL_markstack + 16;
472		486
		487	#ifdef SET_MARK_OFFSET
473	SET_MARK_OFFSET;	488	SET_MARK_OFFSET;
		489	#endif
474		490
475	New(54,PL_scopestack,16,I32);	491	New(54,PL_scopestack,16,I32);
476	PL_scopestack_ix = 0;	492	PL_scopestack_ix = 0;
477	PL_scopestack_max = 16;	493	PL_scopestack_max = 16;
478		494
479	New(54,PL_savestack,96,ANY);	495	New(54,PL_savestack,64,ANY);
480	PL_savestack_ix = 0;	496	PL_savestack_ix = 0;
481	PL_savestack_max = 96;	497	PL_savestack_max = 64;
482		498
		499	#if !PERL_VERSION_ATLEAST (5,9,0)
483	New(54,PL_retstack,8,OP*);	500	New(54,PL_retstack,4,OP*);
484	PL_retstack_ix = 0;	501	PL_retstack_ix = 0;
485	PL_retstack_max = 8;	502	PL_retstack_max = 4;
		503	#endif
486	}	504	}
		505	#endif
487		506
488	/*	507	/*
489	* destroy the stacks, the callchain etc...	508	* destroy the stacks, the callchain etc...
490	* still there is a memleak of 128 bytes...
491	*/	509	*/
492	STATIC void	510	static void
493	destroy_stacks(pTHX)	511	coro_destroy_stacks (pTHX)
494	{	512	{
495	if (!IN_DESTRUCT)	513	if (!IN_DESTRUCT)
496	{	514	{
497	/* is this ugly, I ask? */	515	/* restore all saved variables and stuff */
498	while (PL_scopestack_ix)	516	LEAVE_SCOPE (0);
499	LEAVE;	517	assert (PL_tmps_floor == -1);
500		518
501	/* sure it is, but more important: is it correct?? :/ */	519	/* free all temporaries */
502	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
503	FREETMPS;	520	FREETMPS;
		521	assert (PL_tmps_ix == -1);
		522
		523	/* unwind all extra stacks */
		524	POPSTACK_TO (PL_mainstack);
		525
		526	/* unwind main stack */
		527	dounwind (-1);
504	}	528	}
505		529
506	while (PL_curstackinfo->si_next)	530	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;	531	PL_curstackinfo = PL_curstackinfo->si_next;
508		532
509	while (PL_curstackinfo)	533	while (PL_curstackinfo)
510	{	534	{
511	PERL_SI *p = PL_curstackinfo->si_prev;	535	PERL_SI *p = PL_curstackinfo->si_prev;
512		536
513	{
514	dSP;
515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516	PUTBACK; /* possibly superfluous */
517	}
518
519	if (!IN_DESTRUCT)	537	if (!IN_DESTRUCT)
520	{
521	dounwind(-1);
522	SvREFCNT_dec(PL_curstackinfo->si_stack);	538	SvREFCNT_dec (PL_curstackinfo->si_stack);
523	}
524		539
525	Safefree(PL_curstackinfo->si_cxstack);	540	Safefree (PL_curstackinfo->si_cxstack);
526	Safefree(PL_curstackinfo);	541	Safefree (PL_curstackinfo);
527	PL_curstackinfo = p;	542	PL_curstackinfo = p;
528	}	543	}
529		544
530	Safefree(PL_tmps_stack);	545	Safefree (PL_tmps_stack);
531	Safefree(PL_markstack);	546	Safefree (PL_markstack);
532	Safefree(PL_scopestack);	547	Safefree (PL_scopestack);
533	Safefree(PL_savestack);	548	Safefree (PL_savestack);
		549	#if !PERL_VERSION_ATLEAST (5,9,0)
534	Safefree(PL_retstack);	550	Safefree (PL_retstack);
535	}
536
537	static void
538	allocate_stack (Coro__State ctx, int alloc)
539	{
540	coro_stack *stack;
541
542	New (0, stack, 1, coro_stack);
543
544	stack->refcnt = 1;
545	stack->usecnt = 1;
546	stack->gencnt = ctx->gencnt = 0;
547	if (alloc)
548	{
549	#if HAVE_MMAP
550	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
551	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
552	if (stack->sptr == (void *)-1)
553	#endif	551	#endif
		552	}
		553
		554	static size_t
		555	coro_rss (struct coro *coro)
		556	{
		557	size_t rss = sizeof (coro);
		558
		559	if (coro->mainstack)
		560	{
		561	if (coro->flags & CF_RUNNING)
554	{	562	{
555	/FIXME//D//* reasonable stack size! */	563	#define VAR(name,type)coro->name = PL_ ## name;
556	stack->ssize = -4096 * sizeof (long);	564	# include "state.h"
557	New (0, stack->sptr, 4096, long);	565	#undef VAR
558	}	566	}
559	}
560	else
561	stack->sptr = 0;
562		567
563	ctx->stack = stack;	568	rss += sizeof (coro->curstackinfo);
564	}	569	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		570	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		571	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		572	rss += coro->tmps_max * sizeof (SV *);
		573	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		574	rss += coro->scopestack_max * sizeof (I32);
		575	rss += coro->savestack_max * sizeof (ANY);
565		576
566	static void	577	#if !PERL_VERSION_ATLEAST (5,9,0)
567	deallocate_stack (Coro__State ctx)	578	rss += coro->retstack_max * sizeof (OP *);
568	{	579	#endif
569	coro_stack *stack = ctx->stack;
570
571	ctx->stack = 0;
572
573	if (stack)
574	{	580	}
575	if (!--stack->refcnt)
576	{
577	#ifdef HAVE_MMAP
578	if (stack->ssize > 0 && stack->sptr)
579	munmap (stack->sptr, stack->ssize);
580	else
581	#else
582	Safefree (stack->sptr);
583	#endif
584	Safefree (stack);
585	}
586	else if (ctx->gencnt == stack->gencnt)
587	--stack->usecnt;
588	}
589	}
590		581
		582	return rss;
		583	}
		584
		585	/ coroutine stack handling **********************************************/
		586
591	static void	587	static void
592	setup_coro (void *arg)	588	setup_coro (pTHX_ struct coro *coro)
593	{	589	{
594	/*	590	/*
595	* emulate part of the perl startup here.	591	* emulate part of the perl startup here.
596	*/	592	*/
		593	coro_init_stacks (aTHX);
		594
		595	PL_curcop = &PL_compiling;
		596	PL_in_eval = EVAL_NULL;
		597	PL_comppad = 0;
		598	PL_curpm = 0;
		599	PL_localizing = 0;
		600	PL_dirty = 0;
		601	PL_restartop = 0;
		602
		603	{
		604	dSP;
		605	LOGOP myop;
		606
		607	SvREFCNT_dec (GvAV (PL_defgv));
		608	GvAV (PL_defgv) = coro->args; coro->args = 0;
		609
		610	Zero (&myop, 1, LOGOP);
		611	myop.op_next = Nullop;
		612	myop.op_flags = OPf_WANT_VOID;
		613
		614	PUSHMARK (SP);
		615	XPUSHs (av_shift (GvAV (PL_defgv)));
		616	PUTBACK;
		617	PL_op = (OP *)&myop;
		618	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		619	SPAGAIN;
		620	}
		621
		622	ENTER; /* necessary e.g. for dounwind */
		623	}
		624
		625	static void
		626	free_coro_mortal (pTHX)
		627	{
		628	if (coro_mortal)
		629	{
		630	SvREFCNT_dec (coro_mortal);
		631	coro_mortal = 0;
		632	}
		633	}
		634
		635	static void
		636	do_trace (pTHX)
		637	{
		638	if (PL_curcop != &PL_compiling)
		639	{
		640	runops_proc_t old_runops = PL_runops;
		641	dSP;
		642	ENTER;
		643	SAVETMPS;
		644	PUSHMARK (SP);
		645	PUTBACK;
		646	PL_runops = RUNOPS_DEFAULT;
		647	call_pv ("Coro::_do_trace", G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD \| G_NOARGS);
		648	PL_runops = old_runops;
		649	SPAGAIN;
		650	FREETMPS;
		651	LEAVE;
		652	PUTBACK;
		653	}
		654	}
		655
		656	static int
		657	runops_coro (pTHX)
		658	{
		659	COP *oldcop = 0;
		660
		661	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		662	{
		663	PERL_ASYNC_CHECK ();
		664
		665	if (oldcop != PL_curcop)
		666	{
		667	oldcop = PL_curcop;
		668	do_trace (aTHX);
		669	}
		670	}
		671
		672	TAINT_NOT;
		673	return 0;
		674	}
		675
		676	/* inject a fake call to Coro::State::_cctx_init into the execution */
		677	/* _cctx_init should be careful, as it could be called at almost any time */
		678	/* during execution of a perl program */
		679	static void NOINLINE
		680	prepare_cctx (pTHX_ coro_cctx *cctx)
		681	{
597	dSP;	682	dSP;
598	Coro__State ctx = (Coro__State)arg;	683	LOGOP myop;
599	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
600		684
601	coro_init_stacks (aTHX);	685	PL_top_env = &PL_start_env;
602	/PL_curcop = 0;/
603	/PL_in_eval = PL_in_eval;/ /* inherit */
604	SvREFCNT_dec (GvAV (PL_defgv));
605	GvAV (PL_defgv) = ctx->args;
606		686
		687	if (cctx->flags & CC_TRACE)
		688	PL_runops = runops_coro;
		689
		690	Zero (&myop, 1, LOGOP);
		691	myop.op_next = PL_op;
		692	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		693
		694	PUSHMARK (SP);
		695	EXTEND (SP, 2);
		696	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		697	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		698	PUTBACK;
		699	PL_op = (OP *)&myop;
		700	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
607	SPAGAIN;	701	SPAGAIN;
		702	}
608		703
609	if (ctx->stack)	704	/*
610	{	705	* this is a _very_ stripped down perl interpreter ;)
611	ctx->cursp = 0;	706	*/
		707	static void
		708	coro_run (void *arg)
		709	{
		710	dTHX;
612		711
613	PUSHMARK(SP);	712	/* coro_run is the alternative tail of transfer(), so unlock here. */
614	PUTBACK;	713	UNLOCK;
615	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
616		714
617	if (SvTRUE (ERRSV))	715	/* we now skip the entersub that lead to transfer() */
618	croak (NULL);	716	PL_op = PL_op->op_next;
619	else	717
620	croak ("FATAL: CCTXT coroutine returned!");	718	/* inject a fake subroutine call to cctx_init */
		719	prepare_cctx (aTHX_ (coro_cctx *)arg);
		720
		721	/* somebody or something will hit me for both perl_run and PL_restartop */
		722	PL_restartop = PL_op;
		723	perl_run (PL_curinterp);
		724
		725	/*
		726	* If perl-run returns we assume exit() was being called or the coro
		727	* fell off the end, which seems to be the only valid (non-bug)
		728	* reason for perl_run to return. We try to exit by jumping to the
		729	* bootstrap-time "top" top_env, as we cannot restore the "main"
		730	* coroutine as Coro has no such concept
		731	*/
		732	PL_top_env = main_top_env;
		733	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		734	}
		735
		736	static coro_cctx *
		737	cctx_new ()
		738	{
		739	coro_cctx *cctx;
		740	void *stack_start;
		741	size_t stack_size;
		742
		743	++cctx_count;
		744
		745	Newz (0, cctx, 1, coro_cctx);
		746
		747	#if HAVE_MMAP
		748
		749	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		750	/* mmap supposedly does allocate-on-write for us */
		751	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		752
		753	if (cctx->sptr != (void *)-1)
		754	{
		755	# if CORO_STACKGUARD
		756	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		757	# endif
		758	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		759	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		760	cctx->flags \|= CC_MAPPED;
621	}	761	}
622	else	762	else
623	{	763	#endif
624	UNOP myop;
625
626	PL_op = (OP *)&myop;
627
628	Zero(&myop, 1, UNOP);
629	myop.op_next = Nullop;
630	myop.op_flags = OPf_WANT_VOID;
631
632	PUSHMARK(SP);
633	XPUSHs (sub_init);
634	/*
635	* the next line is slightly wrong, as PL_op->op_next
636	* is actually being executed so we skip the first op.
637	* that doesn't matter, though, since it is only
638	* pp_nextstate and we never return...
639	* ah yes, and I don't care anyways ;)
640	*/
641	PUTBACK;
642	PL_op = pp_entersub();
643	SPAGAIN;
644
645	ENTER; /* necessary e.g. for dounwind */
646	}	764	{
647	}	765	cctx->ssize = coro_stacksize * (long)sizeof (long);
		766	New (0, cctx->sptr, coro_stacksize, long);
648		767
649	static void	768	if (!cctx->sptr)
650	continue_coro (void *arg)	769	{
651	{	770	perror ("FATAL: unable to allocate stack for coroutine");
652	/*	771	_exit (EXIT_FAILURE);
653	* this is a _very_ stripped down perl interpreter ;)	772	}
654	*/
655	Coro__State ctx = (Coro__State)arg;
656	JMPENV coro_start_env;
657		773
658	/* same as JMPENV_BOOTSTRAP */	774	stack_start = cctx->sptr;
659	Zero(&coro_start_env, 1, JMPENV);	775	stack_size = cctx->ssize;
660	coro_start_env.je_ret = -1;	776	}
661	coro_start_env.je_mustcatch = TRUE;
662	PL_top_env = &coro_start_env;
663		777
664	ctx->cursp = 0;	778	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
665	PL_op = PL_op->op_next;	779	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
666	CALLRUNOPS(aTHX);
667		780
668	abort ();	781	return cctx;
669	}	782	}
670		783
671	STATIC void	784	static void
		785	cctx_destroy (coro_cctx *cctx)
		786	{
		787	if (!cctx)
		788	return;
		789
		790	--cctx_count;
		791
		792	#if CORO_USE_VALGRIND
		793	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		794	#endif
		795
		796	#if HAVE_MMAP
		797	if (cctx->flags & CC_MAPPED)
		798	munmap (cctx->sptr, cctx->ssize);
		799	else
		800	#endif
		801	Safefree (cctx->sptr);
		802
		803	Safefree (cctx);
		804	}
		805
		806	static coro_cctx *
		807	cctx_get (pTHX)
		808	{
		809	while (cctx_first)
		810	{
		811	coro_cctx *cctx = cctx_first;
		812	cctx_first = cctx->next;
		813	--cctx_idle;
		814
		815	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		816	return cctx;
		817
		818	cctx_destroy (cctx);
		819	}
		820
		821	return cctx_new ();
		822	}
		823
		824	static void
		825	cctx_put (coro_cctx *cctx)
		826	{
		827	/* free another cctx if overlimit */
		828	if (cctx_idle >= MAX_IDLE_CCTX)
		829	{
		830	coro_cctx *first = cctx_first;
		831	cctx_first = first->next;
		832	--cctx_idle;
		833
		834	cctx_destroy (first);
		835	}
		836
		837	++cctx_idle;
		838	cctx->next = cctx_first;
		839	cctx_first = cctx;
		840	}
		841
		842	/ coroutine switching ***************************************************/
		843
		844	/* never call directly, always through the coro_state_transfer global variable */
		845	static void NOINLINE
672	transfer(pTHX_ struct coro prev, struct coro next, int flags)	846	transfer (pTHX_ struct coro prev, struct coro next)
673	{	847	{
674	dSTACKLEVEL;	848	dSTACKLEVEL;
675	static struct coro *xnext;
676		849
		850	/* sometimes transfer is only called to set idle_sp */
		851	if (!next)
		852	{
		853	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		854	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		855	}
677	if (prev != next)	856	else if (prev != next)
678	{	857	{
679	xnext = next;	858	coro_cctx *prev__cctx;
680		859
681	if (next->mainstack)	860	if (prev->flags & CF_NEW)
682	{	861	{
683	SAVE (prev, flags);	862	/* create a new empty context */
684	LOAD (next);	863	Newz (0, prev->cctx, 1, coro_cctx);
685		864	prev->flags &= ~CF_NEW;
686	/* mark this state as in-use */	865	prev->flags \|= CF_RUNNING;
687	next->mainstack = 0;
688	next->tmps_ix = -2;
689
690	/* stacklevel changed? if yes, grab the stack for us! */
691	if (flags & TRANSFER_SAVE_CCTXT)
692	{
693	if (!prev->stack)
694	allocate_stack (prev, 0);
695	else if (prev->cursp != stacklevel
696	&& prev->stack->usecnt > 1)
697	{
698	prev->gencnt = ++prev->stack->gencnt;
699	prev->stack->usecnt = 1;
700	}
701
702	/* has our stack been invalidated? */
703	if (next->stack && next->stack->gencnt != next->gencnt)
704	{
705	deallocate_stack (next);
706	allocate_stack (next, 1);
707	coro_create (&(next->stack->cctx),
708	continue_coro, (void *)next,
709	next->stack->sptr, labs (next->stack->ssize));
710	}
711
712	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
713	/* don't add any code here */
714	}
715
716	}	866	}
717	else if (next->tmps_ix == -2)	867
718	croak ("tried to transfer to running coroutine");	868	/TODO: must not croak here /
		869	if (!prev->flags & CF_RUNNING)
		870	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		871
		872	if (next->flags & CF_RUNNING)
		873	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		874
		875	if (next->flags & CF_DESTROYED)
		876	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		877
		878	prev->flags &= ~CF_RUNNING;
		879	next->flags \|= CF_RUNNING;
		880
		881	LOCK;
		882
		883	if (next->flags & CF_NEW)
		884	{
		885	/* need to start coroutine */
		886	next->flags &= ~CF_NEW;
		887	/* first get rid of the old state */
		888	save_perl (aTHX_ prev);
		889	/* setup coroutine call */
		890	setup_coro (aTHX_ next);
		891	}
719	else	892	else
720	{	893	{
721	SAVE (prev, -1); /* first get rid of the old state */	894	/* coroutine already started */
722		895	save_perl (aTHX_ prev);
723	if (flags & TRANSFER_SAVE_CCTXT)	896	load_perl (aTHX_ next);
724	{
725	if (!prev->stack)
726	allocate_stack (prev, 0);
727
728	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
729	{
730	setup_coro (next);
731
732	prev->stack->refcnt++;
733	prev->stack->usecnt++;
734	next->stack = prev->stack;
735	next->gencnt = prev->gencnt;
736	}
737	else
738	{
739	allocate_stack (next, 1);
740	coro_create (&(next->stack->cctx),
741	setup_coro, (void *)next,
742	next->stack->sptr, labs (next->stack->ssize));
743	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
744	/* don't add any code here */
745	}
746	}
747	else
748	setup_coro (next);
749	}	897	}
750		898
751	/*	899	prev__cctx = prev->cctx;
752	* xnext is now either prev or next, depending on wether	900
753	* we switched the c stack or not. that's why i use a global	901	/* possibly "free" the cctx */
754	* variable, that should become thread-specific at one point.	902	if (prev__cctx->idle_sp == STACKLEVEL)
755	*/	903	{
756	xnext->cursp = stacklevel;	904	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		905	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		906
		907	prev->cctx = 0;
		908
		909	cctx_put (prev__cctx);
		910	}
		911
		912	if (!next->cctx)
		913	next->cctx = cctx_get (aTHX);
		914
		915	if (prev__cctx != next->cctx)
		916	{
		917	prev__cctx->top_env = PL_top_env;
		918	PL_top_env = next->cctx->top_env;
		919	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		920	}
		921
		922	free_coro_mortal (aTHX);
		923	UNLOCK;
		924	}
		925	}
		926
		927	struct transfer_args
		928	{
		929	struct coro prev, next;
		930	};
		931
		932	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		933
		934	/ high level stuff ******************************************************/
		935
		936	static int
		937	coro_state_destroy (pTHX_ struct coro *coro)
		938	{
		939	if (coro->flags & CF_DESTROYED)
		940	return 0;
		941
		942	coro->flags \|= CF_DESTROYED;
		943
		944	if (coro->flags & CF_READY)
757	}	945	{
		946	/* reduce nready, as destroying a ready coro effectively unreadies it */
		947	/* alternative: look through all ready queues and remove the coro */
		948	LOCK;
		949	--coro_nready;
		950	UNLOCK;
		951	}
		952	else
		953	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
		954
		955	if (coro->mainstack && coro->mainstack != main_mainstack)
		956	{
		957	struct coro temp;
		958
		959	assert (!(coro->flags & CF_RUNNING));
		960
		961	Zero (&temp, 1, struct coro);
		962	temp.save = CORO_SAVE_ALL;
		963
		964	if (coro->flags & CF_RUNNING)
		965	croak ("FATAL: tried to destroy currently running coroutine");
		966
		967	save_perl (aTHX_ &temp);
		968	load_perl (aTHX_ coro);
		969
		970	coro_destroy_stacks (aTHX);
		971
		972	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		973
		974	coro->mainstack = 0;
		975	}
		976
		977	cctx_destroy (coro->cctx);
		978	SvREFCNT_dec (coro->args);
		979
		980	if (coro->next) coro->next->prev = coro->prev;
		981	if (coro->prev) coro->prev->next = coro->next;
		982	if (coro == coro_first) coro_first = coro->next;
		983
		984	return 1;
758	}	985	}
		986
		987	static int
		988	coro_state_free (pTHX_ SV sv, MAGIC mg)
		989	{
		990	struct coro coro = (struct coro )mg->mg_ptr;
		991	mg->mg_ptr = 0;
		992
		993	coro->hv = 0;
		994
		995	if (--coro->refcnt < 0)
		996	{
		997	coro_state_destroy (aTHX_ coro);
		998	Safefree (coro);
		999	}
		1000
		1001	return 0;
		1002	}
		1003
		1004	static int
		1005	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1006	{
		1007	struct coro coro = (struct coro )mg->mg_ptr;
		1008
		1009	++coro->refcnt;
		1010
		1011	return 0;
		1012	}
		1013
		1014	static MGVTBL coro_state_vtbl = {
		1015	0, 0, 0, 0,
		1016	coro_state_free,
		1017	0,
		1018	#ifdef MGf_DUP
		1019	coro_state_dup,
		1020	#else
		1021	# define MGf_DUP 0
		1022	#endif
		1023	};
759		1024
760	static struct coro *	1025	static struct coro *
761	sv_to_coro (SV arg, const char funcname, const char *varname)	1026	SvSTATE_ (pTHX_ SV *coro)
762	{	1027	{
763	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	1028	HV *stash;
764	{	1029	MAGIC *mg;
765	HE he = hv_fetch_ent((HV )SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
766		1030
767	if (!he)	1031	if (SvROK (coro))
768	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);	1032	coro = SvRV (coro);
769		1033
770	arg = HeVAL(he);	1034	stash = SvSTASH (coro);
		1035	if (stash != coro_stash && stash != coro_state_stash)
771	}	1036	{
		1037	/* very slow, but rare, check */
		1038	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		1039	croak ("Coro::State object required");
772		1040	}
773	/* must also be changed inside Coro::Cont::yield */
774	if (SvROK(arg) && SvOBJECT(SvRV(arg))
775	&& SvSTASH(SvRV(arg)) == coro_state_stash)
776	return (struct coro ) SvIV((SV)SvRV(arg));
777		1041
778	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	1042	mg = CORO_MAGIC (coro);
779	/NORETURN/	1043	return (struct coro *)mg->mg_ptr;
780	}	1044	}
781		1045
		1046	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1047
		1048	static void
		1049	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1050	{
		1051	ta->prev = SvSTATE (prev_sv);
		1052	ta->next = SvSTATE (next_sv);
		1053	}
		1054
		1055	static void
		1056	api_transfer (SV prev_sv, SV next_sv)
		1057	{
		1058	dTHX;
		1059	struct transfer_args ta;
		1060
		1061	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1062	TRANSFER (ta);
		1063	}
		1064
782	static void	1065	static int
783	api_transfer(pTHX_ SV prev, SV next, int flags)	1066	api_save (SV *coro_sv, int new_save)
784	{	1067	{
785	transfer(aTHX_	1068	dTHX;
786	sv_to_coro (prev, "Coro::transfer", "prev"),	1069	struct coro *coro = SvSTATE (coro_sv);
787	sv_to_coro (next, "Coro::transfer", "next"),	1070	int old_save = coro->save;
788	flags);	1071
		1072	if (new_save >= 0)
		1073	coro->save = new_save;
		1074
		1075	return old_save;
789	}	1076	}
790		1077
791	/ Coro ******************************************************************/	1078	/ Coro ******************************************************************/
792		1079
793	#define PRIO_MAX 3
794	#define PRIO_HIGH 1
795	#define PRIO_NORMAL 0
796	#define PRIO_LOW -1
797	#define PRIO_IDLE -3
798	#define PRIO_MIN -4
799
800	/* for Coro.pm */
801	static GV coro_current, coro_idle;
802	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
803	static int coro_nready;
804
805	static void	1080	static void
806	coro_enq (SV *sv)	1081	coro_enq (pTHX_ SV *coro_sv)
807	{	1082	{
808	if (SvROK (sv))	1083	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
809	{
810	SV *hv = SvRV (sv);
811	if (SvTYPE (hv) == SVt_PVHV)
812	{
813	SV *xprio = hv_fetch ((HV )hv, "prio", 4, 0);
814	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
815
816	prio = prio > PRIO_MAX ? PRIO_MAX
817	: prio < PRIO_MIN ? PRIO_MIN
818	: prio;
819
820	av_push (coro_ready [prio - PRIO_MIN], sv);
821	coro_nready++;
822
823	return;
824	}
825	}
826
827	croak ("Coro::ready tried to enqueue something that is not a coroutine");
828	}	1084	}
829		1085
830	static SV *	1086	static SV *
831	coro_deq (int min_prio)	1087	coro_deq (pTHX_ int min_prio)
832	{	1088	{
833	int prio = PRIO_MAX - PRIO_MIN;	1089	int prio = PRIO_MAX - PRIO_MIN;
834		1090
835	min_prio -= PRIO_MIN;	1091	min_prio -= PRIO_MIN;
836	if (min_prio < 0)	1092	if (min_prio < 0)
837	min_prio = 0;	1093	min_prio = 0;
838		1094
839	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1095	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
840	if (av_len (coro_ready[prio]) >= 0)	1096	if (AvFILLp (coro_ready [prio]) >= 0)
841	{
842	coro_nready--;
843	return av_shift (coro_ready[prio]);	1097	return av_shift (coro_ready [prio]);
844	}
845		1098
846	return 0;	1099	return 0;
847	}	1100	}
848		1101
849	static void	1102	static int
850	api_ready (SV *coro)	1103	api_ready (SV *coro_sv)
851	{	1104	{
		1105	dTHX;
		1106	struct coro *coro;
		1107
		1108	if (SvROK (coro_sv))
		1109	coro_sv = SvRV (coro_sv);
		1110
		1111	coro = SvSTATE (coro_sv);
		1112
		1113	if (coro->flags & CF_READY)
		1114	return 0;
		1115
		1116	coro->flags \|= CF_READY;
		1117
		1118	LOCK;
852	coro_enq (SvREFCNT_inc (coro));	1119	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
853	}	1120	++coro_nready;
		1121	UNLOCK;
854		1122
		1123	return 1;
		1124	}
		1125
855	static void	1126	static int
856	api_schedule (int cede)	1127	api_is_ready (SV *coro_sv)
857	{	1128	{
		1129	dTHX;
		1130	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1131	}
		1132
		1133	static void
		1134	prepare_schedule (pTHX_ struct transfer_args *ta)
		1135	{
858	SV prev, next;	1136	SV prev_sv, next_sv;
859		1137
		1138	for (;;)
		1139	{
		1140	LOCK;
		1141	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1142
		1143	/* nothing to schedule: call the idle handler */
		1144	if (!next_sv)
		1145	{
		1146	dSP;
		1147	UNLOCK;
		1148
		1149	ENTER;
		1150	SAVETMPS;
		1151
		1152	PUSHMARK (SP);
		1153	PUTBACK;
		1154	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1155
		1156	FREETMPS;
		1157	LEAVE;
		1158	continue;
		1159	}
		1160
		1161	ta->next = SvSTATE (next_sv);
		1162
		1163	/* cannot transfer to destroyed coros, skip and look for next */
		1164	if (ta->next->flags & CF_DESTROYED)
		1165	{
		1166	UNLOCK;
		1167	SvREFCNT_dec (next_sv);
		1168	/* coro_nready is already taken care of by destroy */
		1169	continue;
		1170	}
		1171
		1172	--coro_nready;
		1173	UNLOCK;
		1174	break;
		1175	}
		1176
		1177	/* free this only after the transfer */
860	prev = GvSV (coro_current);	1178	prev_sv = SvRV (coro_current);
		1179	SvRV_set (coro_current, next_sv);
		1180	ta->prev = SvSTATE (prev_sv);
861		1181
862	if (cede)	1182	assert (ta->next->flags & CF_READY);
863	coro_enq (SvREFCNT_inc (prev));	1183	ta->next->flags &= ~CF_READY;
864		1184
865	next = coro_deq (PRIO_MIN);	1185	LOCK;
		1186	free_coro_mortal (aTHX);
		1187	coro_mortal = prev_sv;
		1188	UNLOCK;
		1189	}
866		1190
867	if (!next)	1191	static void
868	next = SvREFCNT_inc (GvSV (coro_idle));	1192	prepare_cede (pTHX_ struct transfer_args *ta)
		1193	{
		1194	api_ready (coro_current);
		1195	prepare_schedule (aTHX_ ta);
		1196	}
869		1197
870	GvSV (coro_current) = SvREFCNT_inc (next);	1198	static int
871	transfer (aTHX_	1199	prepare_cede_notself (pTHX_ struct transfer_args *ta)
872	sv_to_coro (prev, "Coro::schedule", "current coroutine"),	1200	{
873	sv_to_coro (next, "Coro::schedule", "next coroutine"),	1201	if (coro_nready)
874	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);	1202	{
875	SvREFCNT_dec (next);	1203	SV *prev = SvRV (coro_current);
876	SvREFCNT_dec (prev);	1204	prepare_schedule (aTHX_ ta);
		1205	api_ready (prev);
		1206	return 1;
		1207	}
		1208	else
		1209	return 0;
		1210	}
		1211
		1212	static void
		1213	api_schedule (void)
		1214	{
		1215	dTHX;
		1216	struct transfer_args ta;
		1217
		1218	prepare_schedule (aTHX_ &ta);
		1219	TRANSFER (ta);
		1220	}
		1221
		1222	static int
		1223	api_cede (void)
		1224	{
		1225	dTHX;
		1226	struct transfer_args ta;
		1227
		1228	prepare_cede (aTHX_ &ta);
		1229
		1230	if (ta.prev != ta.next)
		1231	{
		1232	TRANSFER (ta);
		1233	return 1;
		1234	}
		1235	else
		1236	return 0;
		1237	}
		1238
		1239	static int
		1240	api_cede_notself (void)
		1241	{
		1242	dTHX;
		1243	struct transfer_args ta;
		1244
		1245	if (prepare_cede_notself (aTHX_ &ta))
		1246	{
		1247	TRANSFER (ta);
		1248	return 1;
		1249	}
		1250	else
		1251	return 0;
877	}	1252	}
878		1253
879	MODULE = Coro::State PACKAGE = Coro::State	1254	MODULE = Coro::State PACKAGE = Coro::State
880		1255
881	PROTOTYPES: ENABLE	1256	PROTOTYPES: DISABLE
882		1257
883	BOOT:	1258	BOOT:
884	{ /* {} necessary for stoopid perl-5.6.x */	1259	{
885	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1260	#ifdef USE_ITHREADS
886	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1261	MUTEX_INIT (&coro_mutex);
		1262	#endif
		1263	BOOT_PAGESIZE;
		1264
887	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1265	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
888		1266
889	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1267	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
890	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1268	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
891	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1269	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1270	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1271	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
892	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1272	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
893		1273	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
894	if (!padlist_cache)
895	padlist_cache = newHV ();
896		1274
897	main_mainstack = PL_mainstack;	1275	main_mainstack = PL_mainstack;
		1276	main_top_env = PL_top_env;
		1277
		1278	while (main_top_env->je_prev)
		1279	main_top_env = main_top_env->je_prev;
898		1280
899	coroapi.ver = CORO_API_VERSION;	1281	coroapi.ver = CORO_API_VERSION;
900	coroapi.transfer = api_transfer;	1282	coroapi.transfer = api_transfer;
901	}
902		1283
903	Coro::State	1284	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
904	_newprocess(args)	1285	}
905	SV * args	1286
906	PROTOTYPE: $	1287	SV *
		1288	new (char *klass, ...)
907	CODE:	1289	CODE:
908	Coro__State coro;	1290	{
		1291	struct coro *coro;
		1292	HV *hv;
		1293	int i;
909		1294
910	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
911	croak ("Coro::State::_newprocess expects an arrayref");
912
913	New (0, coro, 1, struct coro);	1295	Newz (0, coro, 1, struct coro);
		1296	coro->args = newAV ();
		1297	coro->save = CORO_SAVE_DEF;
		1298	coro->flags = CF_NEW;
914		1299
915	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1300	if (coro_first) coro_first->prev = coro;
916	coro->mainstack = 0; /* actual work is done inside transfer */	1301	coro->next = coro_first;
917	coro->stack = 0;	1302	coro_first = coro;
918		1303
919	RETVAL = coro;	1304	coro->hv = hv = newHV ();
		1305	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1306	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1307
		1308	for (i = 1; i < items; i++)
		1309	av_push (coro->args, newSVsv (ST (i)));
		1310	}
920	OUTPUT:	1311	OUTPUT:
921	RETVAL	1312	RETVAL
922		1313
		1314	int
		1315	save (SV *coro, int new_save = -1)
		1316	CODE:
		1317	RETVAL = api_save (coro, new_save);
		1318	OUTPUT:
		1319	RETVAL
		1320
		1321	int
		1322	save_also (SV *coro_sv, int save_also)
		1323	CODE:
		1324	{
		1325	struct coro *coro = SvSTATE (coro_sv);
		1326	RETVAL = coro->save;
		1327	coro->save \|= save_also;
		1328	}
		1329	OUTPUT:
		1330	RETVAL
		1331
923	void	1332	void
924	transfer(prev, next, flags)	1333	_set_stacklevel (...)
925	Coro::State_or_hashref prev	1334	ALIAS:
926	Coro::State_or_hashref next	1335	Coro::State::transfer = 1
927	int flags	1336	Coro::schedule = 2
928	PROTOTYPE: @	1337	Coro::cede = 3
		1338	Coro::cede_notself = 4
929	CODE:	1339	CODE:
930	PUTBACK;	1340	{
931	transfer (aTHX_ prev, next, flags);	1341	struct transfer_args ta;
932	SPAGAIN;	1342
		1343	switch (ix)
		1344	{
		1345	case 0:
		1346	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1347	ta.next = 0;
		1348	break;
		1349
		1350	case 1:
		1351	if (items != 2)
		1352	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1353
		1354	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1355	break;
		1356
		1357	case 2:
		1358	prepare_schedule (aTHX_ &ta);
		1359	break;
		1360
		1361	case 3:
		1362	prepare_cede (aTHX_ &ta);
		1363	break;
		1364
		1365	case 4:
		1366	if (!prepare_cede_notself (aTHX_ &ta))
		1367	XSRETURN_EMPTY;
		1368
		1369	break;
		1370	}
		1371
		1372	BARRIER;
		1373	TRANSFER (ta);
		1374
		1375	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1376	XSRETURN_YES;
		1377	}
		1378
		1379	bool
		1380	_destroy (SV *coro_sv)
		1381	CODE:
		1382	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1383	OUTPUT:
		1384	RETVAL
933		1385
934	void	1386	void
935	DESTROY(coro)
936	Coro::State coro
937	CODE:
938
939	if (coro->mainstack && coro->mainstack != main_mainstack)
940	{
941	struct coro temp;
942
943	PUTBACK;
944	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
945	LOAD(aTHX_ coro);
946	SPAGAIN;
947
948	destroy_stacks (aTHX);
949
950	LOAD((&temp)); /* this will get rid of defsv etc.. */
951	SPAGAIN;
952
953	coro->mainstack = 0;
954	}
955
956	deallocate_stack (coro);
957
958	Safefree (coro);
959
960	void
961	flush()
962	CODE:
963	#ifdef MAY_FLUSH
964	flush_padlist_cache ();
965	#endif
966
967	void
968	_exit(code)	1387	_exit (code)
969	int code	1388	int code
970	PROTOTYPE: $	1389	PROTOTYPE: $
971	CODE:	1390	CODE:
972	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
973	_exit (code);	1391	_exit (code);
974	#else
975	signal (SIGTERM, SIG_DFL);
976	raise (SIGTERM);
977	exit (code);
978	#endif
979		1392
980	MODULE = Coro::State PACKAGE = Coro::Cont	1393	int
		1394	cctx_stacksize (int new_stacksize = 0)
		1395	CODE:
		1396	RETVAL = coro_stacksize;
		1397	if (new_stacksize)
		1398	coro_stacksize = new_stacksize;
		1399	OUTPUT:
		1400	RETVAL
981		1401
982	# this is slightly dirty (should expose a c-level api)	1402	int
		1403	cctx_count ()
		1404	CODE:
		1405	RETVAL = cctx_count;
		1406	OUTPUT:
		1407	RETVAL
		1408
		1409	int
		1410	cctx_idle ()
		1411	CODE:
		1412	RETVAL = cctx_idle;
		1413	OUTPUT:
		1414	RETVAL
983		1415
984	void	1416	void
985	yield(...)	1417	list ()
986	PROTOTYPE: @	1418	PPCODE:
		1419	{
		1420	struct coro *coro;
		1421	for (coro = coro_first; coro; coro = coro->next)
		1422	if (coro->hv)
		1423	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1424	}
		1425
		1426	void
		1427	call (Coro::State coro, SV *coderef)
		1428	ALIAS:
		1429	eval = 1
		1430	CODE:
		1431	{
		1432	if (coro->mainstack)
		1433	{
		1434	struct coro temp;
		1435	Zero (&temp, 1, struct coro);
		1436	temp.save = CORO_SAVE_ALL;
		1437
		1438	if (!(coro->flags & CF_RUNNING))
		1439	{
		1440	save_perl (aTHX_ &temp);
		1441	load_perl (aTHX_ coro);
		1442	}
		1443
		1444	{
		1445	dSP;
		1446	ENTER;
		1447	SAVETMPS;
		1448	PUSHMARK (SP);
		1449	PUTBACK;
		1450	if (ix)
		1451	eval_sv (coderef, 0);
		1452	else
		1453	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1454	SPAGAIN;
		1455	FREETMPS;
		1456	LEAVE;
		1457	PUTBACK;
		1458	}
		1459
		1460	if (!(coro->flags & CF_RUNNING))
		1461	{
		1462	save_perl (aTHX_ coro);
		1463	load_perl (aTHX_ &temp);
		1464	}
		1465	}
		1466	}
		1467
		1468	SV *
		1469	is_ready (Coro::State coro)
		1470	PROTOTYPE: $
		1471	ALIAS:
		1472	is_ready = CF_READY
		1473	is_running = CF_RUNNING
		1474	is_new = CF_NEW
		1475	is_destroyed = CF_DESTROYED
		1476	CODE:
		1477	RETVAL = boolSV (coro->flags & ix);
		1478	OUTPUT:
		1479	RETVAL
		1480
		1481	void
		1482	trace (Coro::State coro, int enable = 0)
		1483	CODE:
		1484	if (enable)
		1485	{
		1486	if (coro->flags & CF_RUNNING)
		1487	croak ("cannot enable tracing on running coroutine");
		1488
		1489	if (coro->cctx)
		1490	croak ("cannot enable tracing on coroutine with custom stack");
		1491
		1492	coro->cctx = cctx_new ();
		1493	coro->cctx->flags \|= CC_TRACE;
		1494	}
		1495	else
		1496	if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1497	{
		1498	coro->cctx->flags &= ~CC_TRACE;
		1499	coro->cctx->flags \|= CC_NOREUSE;
		1500	}
		1501
		1502	SV *
		1503	has_stack (Coro::State coro)
		1504	PROTOTYPE: $
		1505	CODE:
		1506	RETVAL = boolSV (!!coro->cctx);
		1507	OUTPUT:
		1508	RETVAL
		1509
		1510	IV
		1511	rss (Coro::State coro)
		1512	PROTOTYPE: $
987	CODE:	1513	CODE:
988	static SV *returnstk;	1514	RETVAL = coro_rss (coro);
989	SV *sv;	1515	OUTPUT:
990	AV *defav = GvAV (PL_defgv);	1516	RETVAL
991	struct coro prev, next;
992		1517
993	if (!returnstk)
994	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
995
996	/* set up @_ -- ugly */
997	av_clear (defav);
998	av_fill (defav, items - 1);
999	while (items--)
1000	av_store (defav, items, SvREFCNT_inc (ST(items)));
1001
1002	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1003	sv = av_pop ((AV *)SvRV (returnstk));
1004	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
1005	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
1006	SvREFCNT_dec (sv);
1007
1008	transfer(aTHX_ prev, next, 0);
1009		1518
1010	MODULE = Coro::State PACKAGE = Coro	1519	MODULE = Coro::State PACKAGE = Coro
1011		1520
1012	# this is slightly dirty (should expose a c-level api)
1013
1014	BOOT:	1521	BOOT:
1015	{	1522	{
1016	int i;	1523	int i;
		1524
		1525	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1526	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1527	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1528
		1529	coro_current = get_sv ("Coro::current", FALSE);
		1530	SvREADONLY_on (coro_current);
		1531
1017	HV *stash = gv_stashpv ("Coro", TRUE);	1532	coro_stash = gv_stashpv ("Coro", TRUE);
1018		1533
1019	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1534	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1020	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1535	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1021	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1536	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1022	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1537	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1023	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1538	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1024	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1539	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1025
1026	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1027	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1028		1540
1029	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1541	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1030	coro_ready[i] = newAV ();	1542	coro_ready[i] = newAV ();
1031		1543
1032	{	1544	{
1033	SV *sv = perl_get_sv("Coro::API", 1);	1545	SV *sv = perl_get_sv("Coro::API", 1);
1034		1546
1035	coroapi.schedule = api_schedule;	1547	coroapi.schedule = api_schedule;
		1548	coroapi.save = api_save;
		1549	coroapi.cede = api_cede;
		1550	coroapi.cede_notself = api_cede_notself;
1036	coroapi.ready = api_ready;	1551	coroapi.ready = api_ready;
		1552	coroapi.is_ready = api_is_ready;
1037	coroapi.nready = &coro_nready;	1553	coroapi.nready = &coro_nready;
1038	coroapi.current = coro_current;	1554	coroapi.current = coro_current;
1039		1555
1040	GCoroAPI = &coroapi;	1556	GCoroAPI = &coroapi;
1041	sv_setiv(sv, (IV)&coroapi);	1557	sv_setiv (sv, (IV)&coroapi);
1042	SvREADONLY_on(sv);	1558	SvREADONLY_on (sv);
1043	}	1559	}
1044	}	1560	}
1045		1561
1046	void	1562	void
1047	ready(self)	1563	_set_current (SV *current)
1048	SV * self
1049	PROTOTYPE: $	1564	PROTOTYPE: $
1050	CODE:	1565	CODE:
1051	api_ready (self);	1566	SvREFCNT_dec (SvRV (coro_current));
		1567	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1052		1568
1053	int	1569	int
		1570	prio (Coro::State coro, int newprio = 0)
		1571	ALIAS:
		1572	nice = 1
		1573	CODE:
		1574	{
		1575	RETVAL = coro->prio;
		1576
		1577	if (items > 1)
		1578	{
		1579	if (ix)
		1580	newprio = coro->prio - newprio;
		1581
		1582	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1583	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1584
		1585	coro->prio = newprio;
		1586	}
		1587	}
		1588	OUTPUT:
		1589	RETVAL
		1590
		1591	SV *
		1592	ready (SV *self)
		1593	PROTOTYPE: $
		1594	CODE:
		1595	RETVAL = boolSV (api_ready (self));
		1596	OUTPUT:
		1597	RETVAL
		1598
		1599	int
1054	nready(...)	1600	nready (...)
1055	PROTOTYPE:	1601	PROTOTYPE:
1056	CODE:	1602	CODE:
1057	RETVAL = coro_nready;	1603	RETVAL = coro_nready;
1058	OUTPUT:	1604	OUTPUT:
1059	RETVAL	1605	RETVAL
1060		1606
		1607	# for async_pool speedup
1061	void	1608	void
1062	schedule(...)	1609	_pool_1 (SV *cb)
1063	PROTOTYPE:
1064	ALIAS:
1065	cede = 1
1066	CODE:	1610	CODE:
1067	api_schedule (ix);	1611	{
		1612	int i, len;
		1613	HV hv = (HV )SvRV (coro_current);
		1614	AV *defav = GvAV (PL_defgv);
		1615	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1616	AV *invoke_av;
1068		1617
		1618	if (!invoke)
		1619	croak ("\3terminate\2\n");
		1620
		1621	hv_store (hv, "desc", sizeof ("desc") - 1,
		1622	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1623
		1624	invoke_av = (AV *)SvRV (invoke);
		1625	len = av_len (invoke_av);
		1626
		1627	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1628
		1629	if (len > 0)
		1630	{
		1631	av_fill (defav, len - 1);
		1632	for (i = 0; i < len; ++i)
		1633	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1634	}
		1635
		1636	SvREFCNT_dec (invoke);
		1637	}
		1638
		1639	void
		1640	_pool_2 (SV *cb)
		1641	CODE:
		1642	{
		1643	struct coro *coro = SvSTATE (coro_current);
		1644
		1645	sv_setsv (cb, &PL_sv_undef);
		1646
		1647	if (coro_rss (coro) > SvIV (sv_pool_rss)
		1648	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1649	croak ("\3terminate\2\n");
		1650
		1651	av_clear (GvAV (PL_defgv));
		1652	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1653	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1654	coro->save = CORO_SAVE_DEF;
		1655	coro->prio = 0;
		1656	av_push (av_async_pool, newSVsv (coro_current));
		1657	}
		1658
		1659
		1660	MODULE = Coro::State PACKAGE = Coro::AIO
		1661
		1662	SV *
		1663	_get_state ()
		1664	CODE:
		1665	{
		1666	struct io_state *data;
		1667
		1668	RETVAL = newSV (sizeof (struct io_state));
		1669	data = (struct io_state *)SvPVX (RETVAL);
		1670	SvCUR_set (RETVAL, sizeof (struct io_state));
		1671	SvPOK_only (RETVAL);
		1672
		1673	data->errorno = errno;
		1674	data->laststype = PL_laststype;
		1675	data->laststatval = PL_laststatval;
		1676	data->statcache = PL_statcache;
		1677	}
		1678	OUTPUT:
		1679	RETVAL
		1680
		1681	void
		1682	_set_state (char *data_)
		1683	PROTOTYPE: $
		1684	CODE:
		1685	{
		1686	struct io_state data = (void )data_;
		1687
		1688	errno = data->errorno;
		1689	PL_laststype = data->laststype;
		1690	PL_laststatval = data->laststatval;
		1691	PL_statcache = data->statcache;
		1692	}
		1693

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Comparing Coro/Coro/State.xs (file contents): Revision 1.38 by root, Wed Nov 7 00:21:06 2001 UTC vs. Revision 1.165 by root, Wed Sep 26 19:26:48 2007 UTC

Diff Legend

Comparing Coro/Coro/State.xs (file contents):
Revision 1.38 by root, Wed Nov 7 00:21:06 2001 UTC vs.
Revision 1.165 by root, Wed Sep 26 19:26:48 2007 UTC