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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.40 by root, Tue Nov 27 01:41:41 2001 UTC vs.
Revision 1.180 by root, Wed Oct 3 17:12:20 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	static GV irsgv; / $/ */
		138
		139	/* async_pool helper stuff */
		140	static SV *sv_pool_rss;
		141	static SV *sv_pool_size;
		142	static AV *av_async_pool;
		143
		144	static struct coro_cctx *cctx_first;
		145	static int cctx_count, cctx_idle;
		146
		147	enum {
		148	CC_MAPPED = 0x01,
		149	CC_NOREUSE = 0x02, /* throw this away after tracing */
		150	CC_TRACE = 0x04,
		151	CC_TRACE_SUB = 0x08, /* trace sub calls */
		152	CC_TRACE_LINE = 0x10, /* trace each statement */
		153	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		154	};
		155
		156	/* this is a structure representing a c-level coroutine */
40	typedef struct {	157	typedef struct coro_cctx {
41	int refcnt; /* pointer reference counter */	158	struct coro_cctx *next;
42	int usecnt; /* shared by how many coroutines */
43	int gencnt; /* generation counter */
44		159
		160	/* the stack */
		161	void *sptr;
		162	size_t ssize;
		163
		164	/* cpu state */
		165	void idle_sp; / sp of top-level transfer/schedule/cede call */
		166	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		167	JMPENV *top_env;
45	coro_context cctx;	168	coro_context cctx;
46		169
47	void *sptr;	170	#if CORO_USE_VALGRIND
48	long ssize; /* positive == mmap, otherwise malloc */	171	int valgrind_id;
49	} coro_stack;	172	#endif
		173	unsigned char flags;
		174	} coro_cctx;
50		175
		176	enum {
		177	CF_RUNNING = 0x0001, /* coroutine is running */
		178	CF_READY = 0x0002, /* coroutine is ready */
		179	CF_NEW = 0x0004, /* has never been switched to */
		180	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		181	};
		182
		183	/* this is a structure representing a perl-level coroutine */
51	struct coro {	184	struct coro {
52	/* the optional C context */	185	/* the c coroutine allocated to this perl coroutine, if any */
53	coro_stack *stack;	186	coro_cctx *cctx;
54	void *cursp;
55	int gencnt;
56
57	/* optionally saved, might be zero */
58	AV *defav;
59	SV *defsv;
60	SV *errsv;
61
62	/* saved global state not related to stacks */
63	U8 dowarn;
64	I32 in_eval;
65
66	/* the stacks and related info (callchain etc..) */
67	PERL_SI *curstackinfo;
68	AV *curstack;
69	AV *mainstack;
70	SV **stack_sp;
71	OP *op;
72	SV **curpad;
73	SV **stack_base;
74	SV **stack_max;
75	SV **tmps_stack;
76	I32 tmps_floor;
77	I32 tmps_ix;
78	I32 tmps_max;
79	I32 *markstack;
80	I32 *markstack_ptr;
81	I32 *markstack_max;
82	I32 *scopestack;
83	I32 scopestack_ix;
84	I32 scopestack_max;
85	ANY *savestack;
86	I32 savestack_ix;
87	I32 savestack_max;
88	OP **retstack;
89	I32 retstack_ix;
90	I32 retstack_max;
91	COP *curcop;
92	PMOP *curpm;
93	JMPENV *top_env;
94		187
95	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
96	AV *args;	189	AV *args;
		190	int refcnt;
		191	int flags; /* CF_ flags */
		192
		193	/* optionally saved, might be zero */
		194	AV defav; / @_ */
		195	SV defsv; / $_ */
		196	SV errsv; / $@ */
		197	IO deffh; / default filehandle */
		198	SV irssv; / $/ */
		199	SV irssv_sv; / real $/ cache */
		200
		201	#define VAR(name,type) type name;
		202	# include "state.h"
		203	#undef VAR
		204
		205	/* statistics */
		206	int usecount; /* number of switches to this coro */
		207
		208	/* coro process data */
		209	int prio;
		210
		211	/* linked list */
		212	struct coro next, prev;
		213	HV hv; / the perl hash associated with this coro, if any */
97	};	214	};
98		215
99	typedef struct coro *Coro__State;	216	typedef struct coro *Coro__State;
100	typedef struct coro *Coro__State_or_hashref;	217	typedef struct coro *Coro__State_or_hashref;
101		218
102	static AV main_mainstack; / used to differentiate between $main and others */	219	/ 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	static SV coro_mortal; / will be freed after next transfer */
108		220
109	/* mostly copied from op.c:cv_clone2 */	221	#define PRIO_MAX 3
110	STATIC AV *	222	#define PRIO_HIGH 1
111	clone_padlist (AV *protopadlist)	223	#define PRIO_NORMAL 0
		224	#define PRIO_LOW -1
		225	#define PRIO_IDLE -3
		226	#define PRIO_MIN -4
		227
		228	/* for Coro.pm */
		229	static SV *coro_current;
		230	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		231	static int coro_nready;
		232	static struct coro *coro_first;
		233
		234	/ lowlevel stuff ********************************************************/
		235
		236	static AV *
		237	coro_clone_padlist (pTHX_ CV *cv)
112	{	238	{
113	AV *av;	239	AV *padlist = CvPADLIST (cv);
114	I32 ix;
115	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
116	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
117	SV **pname = AvARRAY (protopad_name);
118	SV **ppad = AvARRAY (protopad);
119	I32 fname = AvFILLp (protopad_name);
120	I32 fpad = AvFILLp (protopad);
121	AV newpadlist, newpad_name, *newpad;	240	AV newpadlist, newpad;
122	SV **npad;
123
124	newpad_name = newAV ();
125	for (ix = fname; ix >= 0; ix--)
126	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
127
128	newpad = newAV ();
129	av_fill (newpad, AvFILLp (protopad));
130	npad = AvARRAY (newpad);
131		241
132	newpadlist = newAV ();	242	newpadlist = newAV ();
133	AvREAL_off (newpadlist);	243	AvREAL_off (newpadlist);
134	av_store (newpadlist, 0, (SV *) newpad_name);	244	#if PERL_VERSION_ATLEAST (5,9,0)
		245	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		246	#else
		247	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		248	#endif
		249	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		250	--AvFILLp (padlist);
		251
		252	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
135	av_store (newpadlist, 1, (SV *) newpad);	253	av_store (newpadlist, 1, (SV *)newpad);
136		254
137	av = newAV (); /* will be @_ */	255	return newpadlist;
138	av_extend (av, 0);	256	}
139	av_store (newpad, 0, (SV *) av);
140	AvFLAGS (av) = AVf_REIFY;
141		257
142	for (ix = fpad; ix > 0; ix--)	258	static void
		259	free_padlist (pTHX_ AV *padlist)
		260	{
		261	/* may be during global destruction */
		262	if (SvREFCNT (padlist))
143	{	263	{
144	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	264	I32 i = AvFILLp (padlist);
145	if (namesv && namesv != &PL_sv_undef)	265	while (i >= 0)
146	{	266	{
147	char name = SvPVX (namesv); / XXX */	267	SV **svp = av_fetch (padlist, i--, FALSE);
148	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')	268	if (svp)
149	{ /* lexical from outside? */
150	npad[ix] = SvREFCNT_inc (ppad[ix]);
151	}	269	{
152	else
153	{ /* our own lexical */
154	SV *sv;	270	SV *sv;
155	if (*name == '&')	271	while (&PL_sv_undef != (sv = av_pop ((AV )svp)))
156	sv = SvREFCNT_inc (ppad[ix]);	272	SvREFCNT_dec (sv);
157	else if (*name == '@')	273
158	sv = (SV *) newAV ();	274	SvREFCNT_dec (*svp);
159	else if (*name == '%')
160	sv = (SV *) newHV ();
161	else
162	sv = NEWSV (0, 0);
163	if (!SvPADBUSY (sv))
164	SvPADMY_on (sv);
165	npad[ix] = sv;
166	}	275	}
167	}	276	}
168	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
169	{
170	npad[ix] = SvREFCNT_inc (ppad[ix]);
171	}
172	else
173	{
174	SV *sv = NEWSV (0, 0);
175	SvPADTMP_on (sv);
176	npad[ix] = sv;
177	}
178	}
179		277
180	#if 0 /* return -ENOTUNDERSTOOD */
181	/* Now that vars are all in place, clone nested closures. */
182
183	for (ix = fpad; ix > 0; ix--) {
184	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
185	if (namesv
186	&& namesv != &PL_sv_undef
187	&& !(SvFLAGS(namesv) & SVf_FAKE)
188	&& *SvPVX(namesv) == '&'
189	&& CvCLONE(ppad[ix]))
190	{
191	CV kid = cv_clone((CV)ppad[ix]);
192	SvREFCNT_dec(ppad[ix]);
193	CvCLONE_on(kid);
194	SvPADMY_on(kid);
195	npad[ix] = (SV*)kid;
196	}
197	}
198	#endif
199
200	return newpadlist;
201	}
202
203	#ifdef MAY_FLUSH
204	STATIC void
205	free_padlist (AV *padlist)
206	{
207	/* may be during global destruction */
208	if (SvREFCNT(padlist))
209	{
210	I32 i = AvFILLp(padlist);
211	while (i >= 0)
212	{
213	SV **svp = av_fetch(padlist, i--, FALSE);
214	SV sv = svp ? svp : Nullsv;
215	if (sv)
216	SvREFCNT_dec(sv);
217	}
218
219	SvREFCNT_dec((SV*)padlist);	278	SvREFCNT_dec ((SV*)padlist);
220	}	279	}
221	}	280	}
222	#endif	281
		282	static int
		283	coro_cv_free (pTHX_ SV sv, MAGIC mg)
		284	{
		285	AV *padlist;
		286	AV av = (AV )mg->mg_obj;
		287
		288	/* casting is fun. */
		289	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
		290	free_padlist (aTHX_ padlist);
		291
		292	SvREFCNT_dec (av);
		293
		294	return 0;
		295	}
		296
		297	#define PERL_MAGIC_coro PERL_MAGIC_ext
		298
		299	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		300
		301	#define CORO_MAGIC(cv) \
		302	SvMAGIC (cv) \
		303	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		304	? SvMAGIC (cv) \
		305	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		306	: 0
		307
		308	static struct coro *
		309	SvSTATE_ (pTHX_ SV *coro)
		310	{
		311	HV *stash;
		312	MAGIC *mg;
		313
		314	if (SvROK (coro))
		315	coro = SvRV (coro);
		316
		317	if (SvTYPE (coro) != SVt_PVHV)
		318	croak ("Coro::State object required");
		319
		320	stash = SvSTASH (coro);
		321	if (stash != coro_stash && stash != coro_state_stash)
		322	{
		323	/* very slow, but rare, check */
		324	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		325	croak ("Coro::State object required");
		326	}
		327
		328	mg = CORO_MAGIC (coro);
		329	return (struct coro *)mg->mg_ptr;
		330	}
		331
		332	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
223		333
224	/* the next two functions merely cache the padlists */	334	/* the next two functions merely cache the padlists */
225	STATIC void	335	static void
226	get_padlist (CV *cv)	336	get_padlist (pTHX_ CV *cv)
227	{	337	{
228	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 0);	338	MAGIC *mg = CORO_MAGIC (cv);
		339	AV *av;
229		340
230	if (he && AvFILLp ((AV )he) >= 0)	341	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
231	CvPADLIST (cv) = (AV )av_pop ((AV )*he);	342	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
232	else	343	else
233	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));
234	}
235
236	STATIC void
237	put_padlist (CV *cv)
238	{
239	SV *he = hv_fetch (padlist_cache, (void )&cv, sizeof (CV *), 1);
240
241	if (SvTYPE (*he) != SVt_PVAV)
242	{	344	{
		345	#if CORO_PREFER_PERL_FUNCTIONS
		346	/* this is probably cleaner, but also slower? */
		347	CV *cp = Perl_cv_clone (cv);
		348	CvPADLIST (cv) = CvPADLIST (cp);
		349	CvPADLIST (cp) = 0;
243	SvREFCNT_dec (*he);	350	SvREFCNT_dec (cp);
244	he = (SV )newAV ();	351	#else
		352	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		353	#endif
245	}	354	}
246
247	av_push ((AV )he, (SV *)CvPADLIST (cv));
248	}	355	}
249		356
250	#ifdef MAY_FLUSH	357	static void
251	STATIC void	358	put_padlist (pTHX_ CV *cv)
252	flush_padlist_cache ()
253	{	359	{
254	HV *hv = padlist_cache;	360	MAGIC *mg = CORO_MAGIC (cv);
255	padlist_cache = newHV ();	361	AV *av;
256		362
257	if (hv_iterinit (hv))	363	if (!mg)
258	{
259	HE *he;
260	AV *padlist;
261
262	while (!!(he = hv_iternext (hv)))
263	{
264	AV av = (AV )HeVAL(he);
265
266	/* casting is fun. */
267	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
268	free_padlist (padlist);
269	}
270	}	364	{
		365	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
		366	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
		367	mg->mg_virtual = &vtbl_coro;
		368	mg->mg_obj = (SV *)newAV ();
		369	}
271		370
272	SvREFCNT_dec (hv);	371	av = (AV *)mg->mg_obj;
273	}
274	#endif
275		372
276	#define SB do {	373	if (AvFILLp (av) >= AvMAX (av))
277	#define SE } while (0)	374	av_extend (av, AvMAX (av) + 1);
278		375
279	#define LOAD(state) load_state(aTHX_ (state));	376	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
280	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	377	}
281		378
282	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	379	/ load & save, init *****************************************************/
283		380
284	static void	381	static void
285	load_state(pTHX_ Coro__State c)	382	load_perl (pTHX_ Coro__State c)
286	{	383	{
287	PL_dowarn = c->dowarn;	384	#define VAR(name,type) PL_ ## name = c->name;
288	PL_in_eval = c->in_eval;	385	# include "state.h"
		386	#undef VAR
289		387
290	PL_curstackinfo = c->curstackinfo;	388	GvSV (PL_defgv) = c->defsv;
291	PL_curstack = c->curstack;	389	GvAV (PL_defgv) = c->defav;
292	PL_mainstack = c->mainstack;	390	GvSV (PL_errgv) = c->errsv;
293	PL_stack_sp = c->stack_sp;	391	PL_defoutgv = c->deffh;
294	PL_op = c->op;	392	PL_rs = c->irssv;
295	PL_curpad = c->curpad;	393	GvSV (irsgv) = c->irssv_sv;
296	PL_stack_base = c->stack_base;
297	PL_stack_max = c->stack_max;
298	PL_tmps_stack = c->tmps_stack;
299	PL_tmps_floor = c->tmps_floor;
300	PL_tmps_ix = c->tmps_ix;
301	PL_tmps_max = c->tmps_max;
302	PL_markstack = c->markstack;
303	PL_markstack_ptr = c->markstack_ptr;
304	PL_markstack_max = c->markstack_max;
305	PL_scopestack = c->scopestack;
306	PL_scopestack_ix = c->scopestack_ix;
307	PL_scopestack_max = c->scopestack_max;
308	PL_savestack = c->savestack;
309	PL_savestack_ix = c->savestack_ix;
310	PL_savestack_max = c->savestack_max;
311	PL_retstack = c->retstack;
312	PL_retstack_ix = c->retstack_ix;
313	PL_retstack_max = c->retstack_max;
314	PL_curcop = c->curcop;
315	PL_top_env = c->top_env;
316
317	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
318	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
319	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
320		394
321	{	395	{
322	dSP;	396	dSP;
323	CV *cv;	397	CV *cv;
324		398
325	/* now do the ugly restore mess */	399	/* now do the ugly restore mess */
326	while ((cv = (CV *)POPs))	400	while ((cv = (CV *)POPs))
327	{	401	{
328	AV padlist = (AV )POPs;
329
330	if (padlist)
331	{
332	put_padlist (cv); /* mark this padlist as available */	402	put_padlist (aTHX_ cv); /* mark this padlist as available */
333	CvPADLIST(cv) = padlist;	403	CvDEPTH (cv) = PTR2IV (POPs);
334	#ifdef USE_THREADS	404	CvPADLIST (cv) = (AV *)POPs;
335	/CvOWNER(cv) = (struct perl_thread )POPs;*/
336	#endif
337	}
338
339	++CvDEPTH(cv);
340	}	405	}
341		406
342	PUTBACK;	407	PUTBACK;
343	}	408	}
344	}	409	}
345		410
346	static void	411	static void
347	save_state(pTHX_ Coro__State c, int flags)	412	save_perl (pTHX_ Coro__State c)
348	{	413	{
349	{	414	{
350	dSP;	415	dSP;
351	I32 cxix = cxstack_ix;	416	I32 cxix = cxstack_ix;
352	PERL_CONTEXT *ccstk = cxstack;	417	PERL_CONTEXT *ccstk = cxstack;
…		…
355	/*	420	/*
356	* the worst thing you can imagine happens first - we have to save	421	* the worst thing you can imagine happens first - we have to save
357	* (and reinitialize) all cv's in the whole callchain :(	422	* (and reinitialize) all cv's in the whole callchain :(
358	*/	423	*/
359		424
360	PUSHs (Nullsv);	425	XPUSHs (Nullsv);
361	/* this loop was inspired by pp_caller */	426	/* this loop was inspired by pp_caller */
362	for (;;)	427	for (;;)
363	{	428	{
364	while (cxix >= 0)	429	while (cxix >= 0)
365	{	430	{
366	PERL_CONTEXT *cx = &ccstk[cxix--];	431	PERL_CONTEXT *cx = &ccstk[cxix--];
367		432
368	if (CxTYPE(cx) == CXt_SUB)	433	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
369	{	434	{
370	CV *cv = cx->blk_sub.cv;	435	CV *cv = cx->blk_sub.cv;
		436
371	if (CvDEPTH(cv))	437	if (CvDEPTH (cv))
372	{	438	{
373	#ifdef USE_THREADS
374	/XPUSHs ((SV )CvOWNER(cv));*/
375	/CvOWNER(cv) = 0;/
376	/error must unlock this cv etc.. etc.../
377	#endif
378	EXTEND (SP, CvDEPTH(cv)*2);	439	EXTEND (SP, 3);
379
380	while (--CvDEPTH(cv))
381	{
382	/* this tells the restore code to increment CvDEPTH */
383	PUSHs (Nullsv);
384	PUSHs ((SV *)cv);
385	}
386
387	PUSHs ((SV *)CvPADLIST(cv));	440	PUSHs ((SV *)CvPADLIST (cv));
		441	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
388	PUSHs ((SV *)cv);	442	PUSHs ((SV *)cv);
389		443
390	get_padlist (cv); /* this is a monster */	444	CvDEPTH (cv) = 0;
		445	get_padlist (aTHX_ cv);
391	}	446	}
392	}	447	}
393	else if (CxTYPE(cx) == CXt_FORMAT)
394	{
395	/* I never used formats, so how should I know how these are implemented? */
396	/* my bold guess is as a simple, plain sub... */
397	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
398	}
399	}	448	}
400		449
401	if (top_si->si_type == PERLSI_MAIN)	450	if (top_si->si_type == PERLSI_MAIN)
402	break;	451	break;
403		452
404	top_si = top_si->si_prev;	453	top_si = top_si->si_prev;
405	ccstk = top_si->si_cxstack;	454	ccstk = top_si->si_cxstack;
406	cxix = top_si->si_cxix;	455	cxix = top_si->si_cxix;
407	}	456	}
408		457
409	PUTBACK;	458	PUTBACK;
410	}	459	}
411		460
412	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	461	c->defav = GvAV (PL_defgv);
413	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	462	c->defsv = DEFSV;
414	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	463	c->errsv = ERRSV;
		464	c->deffh = PL_defoutgv;
		465	c->irssv = PL_rs;
		466	c->irssv_sv = GvSV (irsgv);
415		467
416	c->dowarn = PL_dowarn;	468	#define VAR(name,type)c->name = PL_ ## name;
417	c->in_eval = PL_in_eval;	469	# include "state.h"
418		470	#undef VAR
419	c->curstackinfo = PL_curstackinfo;
420	c->curstack = PL_curstack;
421	c->mainstack = PL_mainstack;
422	c->stack_sp = PL_stack_sp;
423	c->op = PL_op;
424	c->curpad = PL_curpad;
425	c->stack_base = PL_stack_base;
426	c->stack_max = PL_stack_max;
427	c->tmps_stack = PL_tmps_stack;
428	c->tmps_floor = PL_tmps_floor;
429	c->tmps_ix = PL_tmps_ix;
430	c->tmps_max = PL_tmps_max;
431	c->markstack = PL_markstack;
432	c->markstack_ptr = PL_markstack_ptr;
433	c->markstack_max = PL_markstack_max;
434	c->scopestack = PL_scopestack;
435	c->scopestack_ix = PL_scopestack_ix;
436	c->scopestack_max = PL_scopestack_max;
437	c->savestack = PL_savestack;
438	c->savestack_ix = PL_savestack_ix;
439	c->savestack_max = PL_savestack_max;
440	c->retstack = PL_retstack;
441	c->retstack_ix = PL_retstack_ix;
442	c->retstack_max = PL_retstack_max;
443	c->curcop = PL_curcop;
444	c->top_env = PL_top_env;
445	}	471	}
446		472
447	/*	473	/*
448	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
449	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
450	* on the assumption that coroutines do not usually need	476	* on the (sometimes correct) assumption that coroutines do
451	* a lot of stackspace.	477	* not usually need a lot of stackspace.
452	*/	478	*/
453	STATIC void	479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
		482	static void
454	coro_init_stacks (pTHX)	483	coro_init_stacks (pTHX)
455	{	484	{
456	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	485	PL_curstackinfo = new_stackinfo(64, 6);
457	PL_curstackinfo->si_type = PERLSI_MAIN;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
458	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
459	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
460		489
461	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
462	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
463	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
464		493
465	New(50,PL_tmps_stack,96,SV*);	494	New(50,PL_tmps_stack,64,SV*);
466	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
467	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
468	PL_tmps_max = 96;	497	PL_tmps_max = 64;
469		498
470	New(54,PL_markstack,16,I32);	499	New(54,PL_markstack,16,I32);
471	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
472	PL_markstack_max = PL_markstack + 16;	501	PL_markstack_max = PL_markstack + 16;
473		502
		503	#ifdef SET_MARK_OFFSET
474	SET_MARK_OFFSET;	504	SET_MARK_OFFSET;
		505	#endif
475		506
476	New(54,PL_scopestack,16,I32);	507	New(54,PL_scopestack,16,I32);
477	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
478	PL_scopestack_max = 16;	509	PL_scopestack_max = 16;
479		510
480	New(54,PL_savestack,96,ANY);	511	New(54,PL_savestack,64,ANY);
481	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
482	PL_savestack_max = 96;	513	PL_savestack_max = 64;
483		514
		515	#if !PERL_VERSION_ATLEAST (5,9,0)
484	New(54,PL_retstack,8,OP*);	516	New(54,PL_retstack,4,OP*);
485	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
486	PL_retstack_max = 8;	518	PL_retstack_max = 4;
		519	#endif
487	}	520	}
		521	#endif
488		522
489	/*	523	/*
490	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
491	* still there is a memleak of 128 bytes...
492	*/	525	*/
493	STATIC void	526	static void
494	destroy_stacks(pTHX)	527	coro_destroy_stacks (pTHX)
495	{	528	{
496	if (!IN_DESTRUCT)
497	{
498	/* is this ugly, I ask? */
499	while (PL_scopestack_ix)
500	LEAVE;
501
502	/* sure it is, but more important: is it correct?? :/ */
503	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504	FREETMPS;
505	}
506
507	while (PL_curstackinfo->si_next)	529	while (PL_curstackinfo->si_next)
508	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
509		531
510	while (PL_curstackinfo)	532	while (PL_curstackinfo)
511	{	533	{
512	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
513		535
514	{
515	dSP;
516	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
517	PUTBACK; /* possibly superfluous */
518	}
519
520	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
521	{
522	dounwind(-1);
523	SvREFCNT_dec(PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
524	}
525		538
526	Safefree(PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
527	Safefree(PL_curstackinfo);	540	Safefree (PL_curstackinfo);
528	PL_curstackinfo = p;	541	PL_curstackinfo = p;
529	}	542	}
530		543
531	Safefree(PL_tmps_stack);	544	Safefree (PL_tmps_stack);
532	Safefree(PL_markstack);	545	Safefree (PL_markstack);
533	Safefree(PL_scopestack);	546	Safefree (PL_scopestack);
534	Safefree(PL_savestack);	547	Safefree (PL_savestack);
		548	#if !PERL_VERSION_ATLEAST (5,9,0)
535	Safefree(PL_retstack);	549	Safefree (PL_retstack);
536	}
537
538	static void
539	allocate_stack (Coro__State ctx, int alloc)
540	{
541	coro_stack *stack;
542
543	New (0, stack, 1, coro_stack);
544
545	stack->refcnt = 1;
546	stack->usecnt = 1;
547	stack->gencnt = ctx->gencnt = 0;
548	if (alloc)
549	{
550	#if HAVE_MMAP
551	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
552	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
553	if (stack->sptr == (void *)-1)
554	#endif	550	#endif
		551	}
		552
		553	static size_t
		554	coro_rss (pTHX_ struct coro *coro)
		555	{
		556	size_t rss = sizeof (coro);
		557
		558	if (coro->mainstack)
		559	{
		560	if (coro->flags & CF_RUNNING)
555	{	561	{
556	/FIXME//D//* reasonable stack size! */	562	#define VAR(name,type)coro->name = PL_ ## name;
557	stack->ssize = -4096 * sizeof (long);	563	# include "state.h"
558	New (0, stack->sptr, 4096, long);	564	#undef VAR
559	}	565	}
560	}
561	else
562	stack->sptr = 0;
563		566
564	ctx->stack = stack;	567	rss += sizeof (coro->curstackinfo);
565	}	568	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		569	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		570	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		571	rss += coro->tmps_max * sizeof (SV *);
		572	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		573	rss += coro->scopestack_max * sizeof (I32);
		574	rss += coro->savestack_max * sizeof (ANY);
566		575
567	static void	576	#if !PERL_VERSION_ATLEAST (5,9,0)
568	deallocate_stack (Coro__State ctx)	577	rss += coro->retstack_max * sizeof (OP *);
569	{	578	#endif
570	coro_stack *stack = ctx->stack;
571
572	ctx->stack = 0;
573
574	if (stack)
575	{	579	}
576	if (!--stack->refcnt)
577	{
578	#ifdef HAVE_MMAP
579	if (stack->ssize > 0 && stack->sptr)
580	munmap (stack->sptr, stack->ssize);
581	else
582	#else
583	Safefree (stack->sptr);
584	#endif
585	Safefree (stack);
586	}
587	else if (ctx->gencnt == stack->gencnt)
588	--stack->usecnt;
589	}
590	}
591		580
		581	return rss;
		582	}
		583
		584	/ coroutine stack handling **********************************************/
		585
592	static void	586	static void
593	setup_coro (void *arg)	587	coro_setup (pTHX_ struct coro *coro)
594	{	588	{
595	/*	589	/*
596	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
597	*/	591	*/
		592	coro_init_stacks (aTHX);
		593
		594	PL_runops = RUNOPS_DEFAULT;
		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	GvSV (PL_defgv) = NEWSV (0, 0);
		604	GvAV (PL_defgv) = coro->args; coro->args = 0;
		605	GvSV (PL_errgv) = NEWSV (0, 0);
		606	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		607	PL_rs = newSVsv (GvSV (irsgv));
		608
		609	{
		610	IO *io = newIO ();
		611	PL_defoutgv = newGVgen ("Coro");
		612	GvIOp(PL_defoutgv) = io;
		613	IoTYPE (io) = IoTYPE_WRONLY;
		614	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		615	IoFLAGS (io) \|= IOf_FLUSH;
		616	}
		617
		618	{
		619	dSP;
		620	LOGOP myop;
		621
		622	Zero (&myop, 1, LOGOP);
		623	myop.op_next = Nullop;
		624	myop.op_flags = OPf_WANT_VOID;
		625
		626	PUSHMARK (SP);
		627	XPUSHs (av_shift (GvAV (PL_defgv)));
		628	PUTBACK;
		629	PL_op = (OP *)&myop;
		630	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		631	SPAGAIN;
		632	}
		633
		634	ENTER; /* necessary e.g. for dounwind */
		635	}
		636
		637	static void
		638	coro_destroy (pTHX_ struct coro *coro)
		639	{
		640	if (!IN_DESTRUCT)
		641	{
		642	/* restore all saved variables and stuff */
		643	LEAVE_SCOPE (0);
		644	assert (PL_tmps_floor == -1);
		645
		646	/* free all temporaries */
		647	FREETMPS;
		648	assert (PL_tmps_ix == -1);
		649
		650	/* unwind all extra stacks */
		651	POPSTACK_TO (PL_mainstack);
		652
		653	/* unwind main stack */
		654	dounwind (-1);
		655	}
		656
		657	SvREFCNT_dec (GvSV (PL_defgv));
		658	SvREFCNT_dec (GvAV (PL_defgv));
		659	SvREFCNT_dec (GvSV (PL_errgv));
		660	SvREFCNT_dec (PL_defoutgv);
		661	SvREFCNT_dec (PL_rs);
		662	SvREFCNT_dec (GvSV (irsgv));
		663
		664	coro_destroy_stacks (aTHX);
		665	}
		666
		667	static void
		668	free_coro_mortal (pTHX)
		669	{
		670	if (coro_mortal)
		671	{
		672	SvREFCNT_dec (coro_mortal);
		673	coro_mortal = 0;
		674	}
		675	}
		676
		677	static int
		678	runops_trace (pTHX)
		679	{
		680	COP *oldcop = 0;
		681	int oldcxix = -2;
		682	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		683	coro_cctx *cctx = coro->cctx;
		684
		685	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		686	{
		687	PERL_ASYNC_CHECK ();
		688
		689	if (cctx->flags & CC_TRACE_ALL)
		690	{
		691	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		692	{
		693	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		694	SV bot, top;
		695	AV av = newAV (); / return values */
		696	SV **cb;
		697	dSP;
		698
		699	GV *gv = CvGV (cx->blk_sub.cv);
		700	SV *fullname = sv_2mortal (newSV (0));
		701	if (isGV (gv))
		702	gv_efullname3 (fullname, gv, 0);
		703
		704	bot = PL_stack_base + cx->blk_oldsp + 1;
		705	top = cx->blk_gimme == G_ARRAY ? SP + 1
		706	: cx->blk_gimme == G_SCALAR ? bot + 1
		707	: bot;
		708
		709	while (bot < top)
		710	av_push (av, SvREFCNT_inc (*bot++));
		711
		712	PL_runops = RUNOPS_DEFAULT;
		713	ENTER;
		714	SAVETMPS;
		715	EXTEND (SP, 3);
		716	PUSHMARK (SP);
		717	PUSHs (&PL_sv_no);
		718	PUSHs (fullname);
		719	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		720	PUTBACK;
		721	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		722	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		723	SPAGAIN;
		724	FREETMPS;
		725	LEAVE;
		726	PL_runops = runops_trace;
		727	}
		728
		729	if (oldcop != PL_curcop)
		730	{
		731	oldcop = PL_curcop;
		732
		733	if (PL_curcop != &PL_compiling)
		734	{
		735	SV **cb;
		736
		737	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		738	{
		739	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		740
		741	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		742	{
		743	runops_proc_t old_runops = PL_runops;
		744	dSP;
		745	GV *gv = CvGV (cx->blk_sub.cv);
		746	SV *fullname = sv_2mortal (newSV (0));
		747
		748	if (isGV (gv))
		749	gv_efullname3 (fullname, gv, 0);
		750
		751	PL_runops = RUNOPS_DEFAULT;
		752	ENTER;
		753	SAVETMPS;
		754	EXTEND (SP, 3);
		755	PUSHMARK (SP);
		756	PUSHs (&PL_sv_yes);
		757	PUSHs (fullname);
		758	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		759	PUTBACK;
		760	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		761	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		762	SPAGAIN;
		763	FREETMPS;
		764	LEAVE;
		765	PL_runops = runops_trace;
		766	}
		767
		768	oldcxix = cxstack_ix;
		769	}
		770
		771	if (cctx->flags & CC_TRACE_LINE)
		772	{
		773	dSP;
		774
		775	PL_runops = RUNOPS_DEFAULT;
		776	ENTER;
		777	SAVETMPS;
		778	EXTEND (SP, 3);
		779	PL_runops = RUNOPS_DEFAULT;
		780	PUSHMARK (SP);
		781	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		782	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		783	PUTBACK;
		784	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		785	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		786	SPAGAIN;
		787	FREETMPS;
		788	LEAVE;
		789	PL_runops = runops_trace;
		790	}
		791	}
		792	}
		793	}
		794	}
		795
		796	TAINT_NOT;
		797	return 0;
		798	}
		799
		800	/* inject a fake call to Coro::State::_cctx_init into the execution */
		801	/* _cctx_init should be careful, as it could be called at almost any time */
		802	/* during execution of a perl program */
		803	static void NOINLINE
		804	prepare_cctx (pTHX_ coro_cctx *cctx)
		805	{
598	dSP;	806	dSP;
599	Coro__State ctx = (Coro__State)arg;	807	LOGOP myop;
600	SV sub_init = (SV)get_cv(SUB_INIT, FALSE);
601		808
602	coro_init_stacks (aTHX);	809	PL_top_env = &PL_start_env;
603	PL_curpm = 0; /* segfault on first access */
604	/PL_curcop = 0;/
605	/PL_in_eval = PL_in_eval;/ /* inherit */
606	SvREFCNT_dec (GvAV (PL_defgv));
607	GvAV (PL_defgv) = ctx->args;
608		810
		811	if (cctx->flags & CC_TRACE)
		812	PL_runops = runops_trace;
		813
		814	Zero (&myop, 1, LOGOP);
		815	myop.op_next = PL_op;
		816	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		817
		818	PUSHMARK (SP);
		819	EXTEND (SP, 2);
		820	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		821	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		822	PUTBACK;
		823	PL_op = (OP *)&myop;
		824	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
609	SPAGAIN;	825	SPAGAIN;
		826	}
610		827
611	if (ctx->stack)	828	/*
612	{	829	* this is a _very_ stripped down perl interpreter ;)
613	ctx->cursp = 0;	830	*/
		831	static void
		832	coro_run (void *arg)
		833	{
		834	dTHX;
614		835
615	PUSHMARK(SP);	836	/* coro_run is the alternative tail of transfer(), so unlock here. */
616	PUTBACK;	837	UNLOCK;
617	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
618		838
619	if (SvTRUE (ERRSV))	839	/* we now skip the entersub that lead to transfer() */
620	croak (NULL);	840	PL_op = PL_op->op_next;
621	else	841
622	croak ("FATAL: CCTXT coroutine returned!");	842	/* inject a fake subroutine call to cctx_init */
		843	prepare_cctx (aTHX_ (coro_cctx *)arg);
		844
		845	/* somebody or something will hit me for both perl_run and PL_restartop */
		846	PL_restartop = PL_op;
		847	perl_run (PL_curinterp);
		848
		849	/*
		850	* If perl-run returns we assume exit() was being called or the coro
		851	* fell off the end, which seems to be the only valid (non-bug)
		852	* reason for perl_run to return. We try to exit by jumping to the
		853	* bootstrap-time "top" top_env, as we cannot restore the "main"
		854	* coroutine as Coro has no such concept
		855	*/
		856	PL_top_env = main_top_env;
		857	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		858	}
		859
		860	static coro_cctx *
		861	cctx_new ()
		862	{
		863	coro_cctx *cctx;
		864	void *stack_start;
		865	size_t stack_size;
		866
		867	++cctx_count;
		868
		869	Newz (0, cctx, 1, coro_cctx);
		870
		871	#if HAVE_MMAP
		872
		873	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		874	/* mmap supposedly does allocate-on-write for us */
		875	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		876
		877	if (cctx->sptr != (void *)-1)
		878	{
		879	# if CORO_STACKGUARD
		880	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		881	# endif
		882	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		883	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		884	cctx->flags \|= CC_MAPPED;
623	}	885	}
624	else	886	else
625	{	887	#endif
626	UNOP myop;
627
628	PL_op = (OP *)&myop;
629
630	Zero(&myop, 1, UNOP);
631	myop.op_next = Nullop;
632	myop.op_flags = OPf_WANT_VOID;
633
634	PUSHMARK(SP);
635	XPUSHs (sub_init);
636	/*
637	* the next line is slightly wrong, as PL_op->op_next
638	* is actually being executed so we skip the first op.
639	* that doesn't matter, though, since it is only
640	* pp_nextstate and we never return...
641	* ah yes, and I don't care anyways ;)
642	*/
643	PUTBACK;
644	PL_op = pp_entersub();
645	SPAGAIN;
646
647	ENTER; /* necessary e.g. for dounwind */
648	}	888	{
649	}	889	cctx->ssize = coro_stacksize * (long)sizeof (long);
		890	New (0, cctx->sptr, coro_stacksize, long);
650		891
651	static void	892	if (!cctx->sptr)
652	continue_coro (void *arg)	893	{
653	{	894	perror ("FATAL: unable to allocate stack for coroutine");
654	/*	895	_exit (EXIT_FAILURE);
655	* this is a _very_ stripped down perl interpreter ;)	896	}
656	*/
657	Coro__State ctx = (Coro__State)arg;
658	JMPENV coro_start_env;
659		897
660	/* same as JMPENV_BOOTSTRAP */	898	stack_start = cctx->sptr;
661	Zero(&coro_start_env, 1, JMPENV);	899	stack_size = cctx->ssize;
662	coro_start_env.je_ret = -1;	900	}
663	coro_start_env.je_mustcatch = TRUE;
664	PL_top_env = &coro_start_env;
665		901
666	ctx->cursp = 0;	902	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
667	PL_op = PL_op->op_next;	903	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
668	CALLRUNOPS(aTHX);
669		904
670	abort ();	905	return cctx;
671	}	906	}
672		907
673	STATIC void	908	static void
		909	cctx_destroy (coro_cctx *cctx)
		910	{
		911	if (!cctx)
		912	return;
		913
		914	--cctx_count;
		915
		916	#if CORO_USE_VALGRIND
		917	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		918	#endif
		919
		920	#if HAVE_MMAP
		921	if (cctx->flags & CC_MAPPED)
		922	munmap (cctx->sptr, cctx->ssize);
		923	else
		924	#endif
		925	Safefree (cctx->sptr);
		926
		927	Safefree (cctx);
		928	}
		929
		930	static coro_cctx *
		931	cctx_get (pTHX)
		932	{
		933	while (cctx_first)
		934	{
		935	coro_cctx *cctx = cctx_first;
		936	cctx_first = cctx->next;
		937	--cctx_idle;
		938
		939	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		940	return cctx;
		941
		942	cctx_destroy (cctx);
		943	}
		944
		945	return cctx_new ();
		946	}
		947
		948	static void
		949	cctx_put (coro_cctx *cctx)
		950	{
		951	/* free another cctx if overlimit */
		952	if (cctx_idle >= MAX_IDLE_CCTX)
		953	{
		954	coro_cctx *first = cctx_first;
		955	cctx_first = first->next;
		956	--cctx_idle;
		957
		958	cctx_destroy (first);
		959	}
		960
		961	++cctx_idle;
		962	cctx->next = cctx_first;
		963	cctx_first = cctx;
		964	}
		965
		966	/ coroutine switching ***************************************************/
		967
		968	static void NOINLINE
		969	transfer_check (pTHX_ struct coro prev, struct coro next)
		970	{
		971	if (prev != next)
		972	{
		973	if (!(prev->flags & (CF_RUNNING \| CF_NEW)))
		974	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		975
		976	if (next->flags & CF_RUNNING)
		977	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		978
		979	if (next->flags & CF_DESTROYED)
		980	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		981
		982	if (PL_lex_state != LEX_NOTPARSING)
		983	croak ("Coro::State::transfer called while parsing, but this is not supported");
		984	}
		985	}
		986
		987	/* always use the TRANSFER macro */
		988	static void NOINLINE
674	transfer(pTHX_ struct coro prev, struct coro next, int flags)	989	transfer (pTHX_ struct coro prev, struct coro next)
675	{	990	{
676	dSTACKLEVEL;	991	dSTACKLEVEL;
677	static struct coro *xnext;
678		992
		993	/* sometimes transfer is only called to set idle_sp */
		994	if (!next)
		995	{
		996	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		997	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		998	}
679	if (prev != next)	999	else if (prev != next)
680	{	1000	{
681	xnext = next;	1001	coro_cctx *prev__cctx;
682		1002
683	if (next->mainstack)	1003	if (prev->flags & CF_NEW)
684	{	1004	{
685	SAVE (prev, flags);	1005	/* create a new empty context */
686	LOAD (next);	1006	Newz (0, prev->cctx, 1, coro_cctx);
687		1007	prev->flags &= ~CF_NEW;
688	/* mark this state as in-use */	1008	prev->flags \|= CF_RUNNING;
689	next->mainstack = 0;
690	next->tmps_ix = -2;
691
692	/* stacklevel changed? if yes, grab the stack for us! */
693	if (flags & TRANSFER_SAVE_CCTXT)
694	{
695	if (!prev->stack)
696	allocate_stack (prev, 0);
697	else if (prev->cursp != stacklevel
698	&& prev->stack->usecnt > 1)
699	{
700	prev->gencnt = ++prev->stack->gencnt;
701	prev->stack->usecnt = 1;
702	}
703
704	/* has our stack been invalidated? */
705	if (next->stack && next->stack->gencnt != next->gencnt)
706	{
707	deallocate_stack (next);
708	allocate_stack (next, 1);
709	coro_create (&(next->stack->cctx),
710	continue_coro, (void *)next,
711	next->stack->sptr, labs (next->stack->ssize));
712	}
713
714	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
715	/* don't add any code here */
716	}
717
718	}	1009	}
719	else if (next->tmps_ix == -2)	1010
720	croak ("tried to transfer to running coroutine");	1011	prev->flags &= ~CF_RUNNING;
		1012	next->flags \|= CF_RUNNING;
		1013
		1014	LOCK;
		1015
		1016	if (next->flags & CF_NEW)
		1017	{
		1018	/* need to start coroutine */
		1019	next->flags &= ~CF_NEW;
		1020	/* first get rid of the old state */
		1021	save_perl (aTHX_ prev);
		1022	/* setup coroutine call */
		1023	coro_setup (aTHX_ next);
		1024	}
721	else	1025	else
722	{	1026	{
723	SAVE (prev, -1); /* first get rid of the old state */	1027	/* coroutine already started */
724		1028	save_perl (aTHX_ prev);
725	if (flags & TRANSFER_SAVE_CCTXT)	1029	load_perl (aTHX_ next);
726	{
727	if (!prev->stack)
728	allocate_stack (prev, 0);
729
730	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
731	{
732	setup_coro (next);
733
734	prev->stack->refcnt++;
735	prev->stack->usecnt++;
736	next->stack = prev->stack;
737	next->gencnt = prev->gencnt;
738	}
739	else
740	{
741	allocate_stack (next, 1);
742	coro_create (&(next->stack->cctx),
743	setup_coro, (void *)next,
744	next->stack->sptr, labs (next->stack->ssize));
745	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
746	/* don't add any code here */
747	}
748	}
749	else
750	setup_coro (next);
751	}	1030	}
752		1031
753	/*	1032	prev__cctx = prev->cctx;
754	* xnext is now either prev or next, depending on wether	1033
755	* we switched the c stack or not. that's why i use a global	1034	/* possibly "free" the cctx */
756	* variable, that should become thread-specific at one point.	1035	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
757	*/	1036	{
758	xnext->cursp = stacklevel;	1037	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
759	}	1038	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
760		1039
761	if (coro_mortal)	1040	prev->cctx = 0;
		1041
		1042	cctx_put (prev__cctx);
		1043	}
		1044
		1045	++next->usecount;
		1046
		1047	if (!next->cctx)
		1048	next->cctx = cctx_get (aTHX);
		1049
		1050	if (prev__cctx != next->cctx)
		1051	{
		1052	prev__cctx->top_env = PL_top_env;
		1053	PL_top_env = next->cctx->top_env;
		1054	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1055	}
		1056
		1057	free_coro_mortal (aTHX);
		1058	UNLOCK;
762	{	1059	}
763	SvREFCNT_dec (coro_mortal);	1060	}
764	coro_mortal = 0;	1061
		1062	struct transfer_args
		1063	{
		1064	struct coro prev, next;
		1065	};
		1066
		1067	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1068	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1069
		1070	/ high level stuff ******************************************************/
		1071
		1072	static int
		1073	coro_state_destroy (pTHX_ struct coro *coro)
		1074	{
		1075	if (coro->flags & CF_DESTROYED)
		1076	return 0;
		1077
		1078	coro->flags \|= CF_DESTROYED;
		1079
		1080	if (coro->flags & CF_READY)
765	}	1081	{
766	}	1082	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1083	/* alternative: look through all ready queues and remove the coro */
		1084	LOCK;
		1085	--coro_nready;
		1086	UNLOCK;
		1087	}
		1088	else
		1089	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
767		1090
768	#define SV_CORO(sv,func) \	1091	if (coro->mainstack && coro->mainstack != main_mainstack)
769	do { \	1092	{
770	if (SvROK (sv)) \	1093	struct coro temp;
771	sv = SvRV (sv); \
772	\
773	if (SvTYPE(sv) == SVt_PVHV) \
774	{ \
775	HE he = hv_fetch_ent((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
776	\
777	if (!he) \
778	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
779	\
780	(sv) = SvRV (HeVAL(he)); \
781	} \
782	\
783	/* must also be changed inside Coro::Cont::yield */ \
784	if (!SvOBJECT(sv) \|\| SvSTASH(sv) != coro_state_stash) \
785	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
786	\
787	} while(0)
788		1094
789	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1095	if (coro->flags & CF_RUNNING)
		1096	croak ("FATAL: tried to destroy currently running coroutine");
790		1097
		1098	save_perl (aTHX_ &temp);
		1099	load_perl (aTHX_ coro);
		1100
		1101	coro_destroy (aTHX_ coro);
		1102
		1103	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1104
		1105	coro->mainstack = 0;
		1106	}
		1107
		1108	cctx_destroy (coro->cctx);
		1109	SvREFCNT_dec (coro->args);
		1110
		1111	if (coro->next) coro->next->prev = coro->prev;
		1112	if (coro->prev) coro->prev->next = coro->next;
		1113	if (coro == coro_first) coro_first = coro->next;
		1114
		1115	return 1;
		1116	}
		1117
791	static void	1118	static int
		1119	coro_state_free (pTHX_ SV sv, MAGIC mg)
		1120	{
		1121	struct coro coro = (struct coro )mg->mg_ptr;
		1122	mg->mg_ptr = 0;
		1123
		1124	coro->hv = 0;
		1125
		1126	if (--coro->refcnt < 0)
		1127	{
		1128	coro_state_destroy (aTHX_ coro);
		1129	Safefree (coro);
		1130	}
		1131
		1132	return 0;
		1133	}
		1134
		1135	static int
		1136	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1137	{
		1138	struct coro coro = (struct coro )mg->mg_ptr;
		1139
		1140	++coro->refcnt;
		1141
		1142	return 0;
		1143	}
		1144
		1145	static MGVTBL coro_state_vtbl = {
		1146	0, 0, 0, 0,
		1147	coro_state_free,
		1148	0,
		1149	#ifdef MGf_DUP
		1150	coro_state_dup,
		1151	#else
		1152	# define MGf_DUP 0
		1153	#endif
		1154	};
		1155
		1156	static void
		1157	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1158	{
		1159	ta->prev = SvSTATE (prev_sv);
		1160	ta->next = SvSTATE (next_sv);
		1161	TRANSFER_CHECK (*ta);
		1162	}
		1163
		1164	static void
792	api_transfer(pTHX_ SV prev, SV next, int flags)	1165	api_transfer (SV prev_sv, SV next_sv)
793	{	1166	{
794	SV_CORO (prev, "Coro::transfer");	1167	dTHX;
795	SV_CORO (next, "Coro::transfer");	1168	struct transfer_args ta;
796		1169
797	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	1170	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1171	TRANSFER (ta);
798	}	1172	}
799		1173
800	/ Coro ******************************************************************/	1174	/ Coro ******************************************************************/
801		1175
802	#define PRIO_MAX 3
803	#define PRIO_HIGH 1
804	#define PRIO_NORMAL 0
805	#define PRIO_LOW -1
806	#define PRIO_IDLE -3
807	#define PRIO_MIN -4
808
809	/* for Coro.pm */
810	static GV coro_current, coro_idle;
811	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
812	static int coro_nready;
813
814	static void	1176	static void
815	coro_enq (SV *sv)	1177	coro_enq (pTHX_ SV *coro_sv)
816	{	1178	{
817	if (SvTYPE (sv) == SVt_PVHV)
818	{
819	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
820	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
821
822	prio = prio > PRIO_MAX ? PRIO_MAX
823	: prio < PRIO_MIN ? PRIO_MIN
824	: prio;
825
826	av_push (coro_ready [prio - PRIO_MIN], sv);	1179	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
827	coro_nready++;
828
829	return;
830	}
831
832	croak ("Coro::ready tried to enqueue something that is not a coroutine");
833	}	1180	}
834		1181
835	static SV *	1182	static SV *
836	coro_deq (int min_prio)	1183	coro_deq (pTHX_ int min_prio)
837	{	1184	{
838	int prio = PRIO_MAX - PRIO_MIN;	1185	int prio = PRIO_MAX - PRIO_MIN;
839		1186
840	min_prio -= PRIO_MIN;	1187	min_prio -= PRIO_MIN;
841	if (min_prio < 0)	1188	if (min_prio < 0)
842	min_prio = 0;	1189	min_prio = 0;
843		1190
844	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1191	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
845	if (av_len (coro_ready[prio]) >= 0)	1192	if (AvFILLp (coro_ready [prio]) >= 0)
846	{
847	coro_nready--;
848	return av_shift (coro_ready[prio]);	1193	return av_shift (coro_ready [prio]);
849	}
850		1194
851	return 0;	1195	return 0;
852	}	1196	}
853		1197
854	static void	1198	static int
855	api_ready (SV *coro)	1199	api_ready (SV *coro_sv)
856	{	1200	{
		1201	dTHX;
		1202	struct coro *coro;
		1203
857	if (SvROK (coro))	1204	if (SvROK (coro_sv))
858	coro = SvRV (coro);	1205	coro_sv = SvRV (coro_sv);
859		1206
		1207	coro = SvSTATE (coro_sv);
		1208
		1209	if (coro->flags & CF_READY)
		1210	return 0;
		1211
		1212	coro->flags \|= CF_READY;
		1213
		1214	LOCK;
860	coro_enq (SvREFCNT_inc (coro));	1215	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1216	++coro_nready;
		1217	UNLOCK;
		1218
		1219	return 1;
		1220	}
		1221
		1222	static int
		1223	api_is_ready (SV *coro_sv)
		1224	{
		1225	dTHX;
		1226	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1227	}
		1228
		1229	static void
		1230	prepare_schedule (pTHX_ struct transfer_args *ta)
		1231	{
		1232	SV prev_sv, next_sv;
		1233
		1234	for (;;)
		1235	{
		1236	LOCK;
		1237	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1238
		1239	/* nothing to schedule: call the idle handler */
		1240	if (!next_sv)
		1241	{
		1242	dSP;
		1243	UNLOCK;
		1244
		1245	ENTER;
		1246	SAVETMPS;
		1247
		1248	PUSHMARK (SP);
		1249	PUTBACK;
		1250	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1251
		1252	FREETMPS;
		1253	LEAVE;
		1254	continue;
		1255	}
		1256
		1257	ta->next = SvSTATE (next_sv);
		1258
		1259	/* cannot transfer to destroyed coros, skip and look for next */
		1260	if (ta->next->flags & CF_DESTROYED)
		1261	{
		1262	UNLOCK;
		1263	SvREFCNT_dec (next_sv);
		1264	/* coro_nready is already taken care of by destroy */
		1265	continue;
		1266	}
		1267
		1268	--coro_nready;
		1269	UNLOCK;
		1270	break;
		1271	}
		1272
		1273	/* free this only after the transfer */
		1274	prev_sv = SvRV (coro_current);
		1275	ta->prev = SvSTATE (prev_sv);
		1276	TRANSFER_CHECK (*ta);
		1277	assert (ta->next->flags & CF_READY);
		1278	ta->next->flags &= ~CF_READY;
		1279	SvRV_set (coro_current, next_sv);
		1280
		1281	LOCK;
		1282	free_coro_mortal (aTHX);
		1283	coro_mortal = prev_sv;
		1284	UNLOCK;
		1285	}
		1286
		1287	static void
		1288	prepare_cede (pTHX_ struct transfer_args *ta)
		1289	{
		1290	api_ready (coro_current);
		1291	prepare_schedule (aTHX_ ta);
		1292	}
		1293
		1294	static int
		1295	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1296	{
		1297	if (coro_nready)
		1298	{
		1299	SV *prev = SvRV (coro_current);
		1300	prepare_schedule (aTHX_ ta);
		1301	api_ready (prev);
		1302	return 1;
		1303	}
		1304	else
		1305	return 0;
861	}	1306	}
862		1307
863	static void	1308	static void
864	api_schedule (void)	1309	api_schedule (void)
865	{	1310	{
866	SV prev, next;	1311	dTHX;
		1312	struct transfer_args ta;
867		1313
868	prev = SvRV (GvSV (coro_current));	1314	prepare_schedule (aTHX_ &ta);
869	next = coro_deq (PRIO_MIN);	1315	TRANSFER (ta);
870
871	if (!next)
872	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
873
874	/* free this only after the transfer */
875	coro_mortal = prev;
876	SV_CORO (prev, "Coro::schedule");
877
878	SvRV (GvSV (coro_current)) = next;
879
880	SV_CORO (next, "Coro::schedule");
881
882	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
883	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
884	}	1316	}
885		1317
886	static void	1318	static int
887	api_cede (void)	1319	api_cede (void)
888	{	1320	{
889	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1321	dTHX;
		1322	struct transfer_args ta;
890		1323
891	api_schedule ();	1324	prepare_cede (aTHX_ &ta);
892	}
893		1325
		1326	if (ta.prev != ta.next)
		1327	{
		1328	TRANSFER (ta);
		1329	return 1;
		1330	}
		1331	else
		1332	return 0;
		1333	}
		1334
		1335	static int
		1336	api_cede_notself (void)
		1337	{
		1338	dTHX;
		1339	struct transfer_args ta;
		1340
		1341	if (prepare_cede_notself (aTHX_ &ta))
		1342	{
		1343	TRANSFER (ta);
		1344	return 1;
		1345	}
		1346	else
		1347	return 0;
		1348	}
		1349
		1350	static void
		1351	api_trace (SV *coro_sv, int flags)
		1352	{
		1353	dTHX;
		1354	struct coro *coro = SvSTATE (coro_sv);
		1355
		1356	if (flags & CC_TRACE)
		1357	{
		1358	if (!coro->cctx)
		1359	coro->cctx = cctx_new ();
		1360	else if (!(coro->cctx->flags & CC_TRACE))
		1361	croak ("cannot enable tracing on coroutine with custom stack");
		1362
		1363	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1364	}
		1365	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1366	{
		1367	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1368
		1369	if (coro->flags & CF_RUNNING)
		1370	PL_runops = RUNOPS_DEFAULT;
		1371	else
		1372	coro->runops = RUNOPS_DEFAULT;
		1373	}
		1374	}
		1375
894	MODULE = Coro::State PACKAGE = Coro::State	1376	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
895		1377
896	PROTOTYPES: ENABLE	1378	PROTOTYPES: DISABLE
897		1379
898	BOOT:	1380	BOOT:
899	{ /* {} necessary for stoopid perl-5.6.x */	1381	{
900	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1382	#ifdef USE_ITHREADS
901	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1383	MUTEX_INIT (&coro_mutex);
		1384	#endif
		1385	BOOT_PAGESIZE;
		1386
		1387	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1388
902	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1389	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
903		1390
904	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1391	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
905	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
906	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
907	newCONSTSUB (coro_state_stash, "SAVE_CURPM", newSViv (TRANSFER_SAVE_CURPM));	1392	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
		1393	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
908	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1394	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
909
910	if (!padlist_cache)
911	padlist_cache = newHV ();
912		1395
913	main_mainstack = PL_mainstack;	1396	main_mainstack = PL_mainstack;
		1397	main_top_env = PL_top_env;
		1398
		1399	while (main_top_env->je_prev)
		1400	main_top_env = main_top_env->je_prev;
914		1401
915	coroapi.ver = CORO_API_VERSION;	1402	coroapi.ver = CORO_API_VERSION;
916	coroapi.transfer = api_transfer;	1403	coroapi.transfer = api_transfer;
917	}
918		1404
919	Coro::State	1405	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
920	_newprocess(args)	1406	}
921	SV * args	1407
922	PROTOTYPE: $	1408	SV *
		1409	new (char *klass, ...)
923	CODE:	1410	CODE:
924	Coro__State coro;	1411	{
		1412	struct coro *coro;
		1413	HV *hv;
		1414	int i;
925		1415
926	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
927	croak ("Coro::State::_newprocess expects an arrayref");
928
929	New (0, coro, 1, struct coro);	1416	Newz (0, coro, 1, struct coro);
		1417	coro->args = newAV ();
		1418	coro->flags = CF_NEW;
930		1419
931	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1420	if (coro_first) coro_first->prev = coro;
932	coro->mainstack = 0; /* actual work is done inside transfer */	1421	coro->next = coro_first;
933	coro->stack = 0;	1422	coro_first = coro;
934		1423
935	RETVAL = coro;	1424	coro->hv = hv = newHV ();
		1425	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
		1426	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
		1427
		1428	for (i = 1; i < items; i++)
		1429	av_push (coro->args, newSVsv (ST (i)));
		1430	}
936	OUTPUT:	1431	OUTPUT:
937	RETVAL	1432	RETVAL
938		1433
		1434	# these not obviously related functions are all rolled into the same xs
		1435	# function to increase chances that they all will call transfer with the same
		1436	# stack offset
939	void	1437	void
940	transfer(prev, next, flags)	1438	_set_stacklevel (...)
941	SV *prev	1439	ALIAS:
942	SV *next	1440	Coro::State::transfer = 1
943	int flags	1441	Coro::schedule = 2
944	PROTOTYPE: @	1442	Coro::cede = 3
		1443	Coro::cede_notself = 4
945	CODE:	1444	CODE:
946	PUTBACK;	1445	{
947	SV_CORO (next, "Coro::transfer");	1446	struct transfer_args ta;
948	SV_CORO (prev, "Coro::transfer");	1447
949	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1448	switch (ix)
950	SPAGAIN;	1449	{
		1450	case 0:
		1451	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1452	ta.next = 0;
		1453	break;
		1454
		1455	case 1:
		1456	if (items != 2)
		1457	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1458
		1459	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1460	break;
		1461
		1462	case 2:
		1463	prepare_schedule (aTHX_ &ta);
		1464	break;
		1465
		1466	case 3:
		1467	prepare_cede (aTHX_ &ta);
		1468	break;
		1469
		1470	case 4:
		1471	if (!prepare_cede_notself (aTHX_ &ta))
		1472	XSRETURN_EMPTY;
		1473
		1474	break;
		1475	}
		1476
		1477	BARRIER;
		1478	TRANSFER (ta);
		1479
		1480	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1481	XSRETURN_YES;
		1482	}
		1483
		1484	bool
		1485	_destroy (SV *coro_sv)
		1486	CODE:
		1487	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1488	OUTPUT:
		1489	RETVAL
951		1490
952	void	1491	void
953	DESTROY(coro)
954	Coro::State coro
955	CODE:
956
957	if (coro->mainstack && coro->mainstack != main_mainstack)
958	{
959	struct coro temp;
960
961	PUTBACK;
962	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
963	LOAD(aTHX_ coro);
964	SPAGAIN;
965
966	destroy_stacks (aTHX);
967
968	LOAD((&temp)); /* this will get rid of defsv etc.. */
969	SPAGAIN;
970
971	coro->mainstack = 0;
972	}
973
974	deallocate_stack (coro);
975
976	Safefree (coro);
977
978	void
979	flush()
980	CODE:
981	#ifdef MAY_FLUSH
982	flush_padlist_cache ();
983	#endif
984
985	void
986	_exit(code)	1492	_exit (code)
987	int code	1493	int code
988	PROTOTYPE: $	1494	PROTOTYPE: $
989	CODE:	1495	CODE:
990	#if defined(__GLIBC__) \|\| _POSIX_C_SOURCE
991	_exit (code);	1496	_exit (code);
992	#else
993	signal (SIGTERM, SIG_DFL);
994	raise (SIGTERM);
995	exit (code);
996	#endif
997		1497
998	MODULE = Coro::State PACKAGE = Coro::Cont	1498	int
		1499	cctx_stacksize (int new_stacksize = 0)
		1500	CODE:
		1501	RETVAL = coro_stacksize;
		1502	if (new_stacksize)
		1503	coro_stacksize = new_stacksize;
		1504	OUTPUT:
		1505	RETVAL
999		1506
1000	# this is slightly dirty (should expose a c-level api)	1507	int
		1508	cctx_count ()
		1509	CODE:
		1510	RETVAL = cctx_count;
		1511	OUTPUT:
		1512	RETVAL
		1513
		1514	int
		1515	cctx_idle ()
		1516	CODE:
		1517	RETVAL = cctx_idle;
		1518	OUTPUT:
		1519	RETVAL
1001		1520
1002	void	1521	void
1003	yield(...)	1522	list ()
1004	PROTOTYPE: @	1523	PPCODE:
		1524	{
		1525	struct coro *coro;
		1526	for (coro = coro_first; coro; coro = coro->next)
		1527	if (coro->hv)
		1528	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1529	}
		1530
		1531	void
		1532	call (Coro::State coro, SV *coderef)
		1533	ALIAS:
		1534	eval = 1
		1535	CODE:
		1536	{
		1537	if (coro->mainstack)
		1538	{
		1539	struct coro temp;
		1540	Zero (&temp, 1, struct coro);
		1541
		1542	if (!(coro->flags & CF_RUNNING))
		1543	{
		1544	save_perl (aTHX_ &temp);
		1545	load_perl (aTHX_ coro);
		1546	}
		1547
		1548	{
		1549	dSP;
		1550	ENTER;
		1551	SAVETMPS;
		1552	PUSHMARK (SP);
		1553	PUTBACK;
		1554	if (ix)
		1555	eval_sv (coderef, 0);
		1556	else
		1557	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1558	SPAGAIN;
		1559	FREETMPS;
		1560	LEAVE;
		1561	PUTBACK;
		1562	}
		1563
		1564	if (!(coro->flags & CF_RUNNING))
		1565	{
		1566	save_perl (aTHX_ coro);
		1567	load_perl (aTHX_ &temp);
		1568	}
		1569	}
		1570	}
		1571
		1572	SV *
		1573	is_ready (Coro::State coro)
		1574	PROTOTYPE: $
		1575	ALIAS:
		1576	is_ready = CF_READY
		1577	is_running = CF_RUNNING
		1578	is_new = CF_NEW
		1579	is_destroyed = CF_DESTROYED
		1580	CODE:
		1581	RETVAL = boolSV (coro->flags & ix);
		1582	OUTPUT:
		1583	RETVAL
		1584
		1585	void
		1586	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1587
		1588	SV *
		1589	has_stack (Coro::State coro)
		1590	PROTOTYPE: $
		1591	CODE:
		1592	RETVAL = boolSV (!!coro->cctx);
		1593	OUTPUT:
		1594	RETVAL
		1595
		1596	int
		1597	is_traced (Coro::State coro)
		1598	PROTOTYPE: $
		1599	CODE:
		1600	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1601	OUTPUT:
		1602	RETVAL
		1603
		1604	IV
		1605	rss (Coro::State coro)
		1606	PROTOTYPE: $
		1607	ALIAS:
		1608	usecount = 1
1005	CODE:	1609	CODE:
1006	static SV *returnstk;	1610	switch (ix)
1007	SV *sv;	1611	{
1008	AV *defav = GvAV (PL_defgv);	1612	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1009	struct coro prev, next;	1613	case 1: RETVAL = coro->usecount; break;
		1614	}
		1615	OUTPUT:
		1616	RETVAL
1010		1617
1011	if (!returnstk)
1012	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
1013
1014	/* set up @_ -- ugly */
1015	av_clear (defav);
1016	av_fill (defav, items - 1);
1017	while (items--)
1018	av_store (defav, items, SvREFCNT_inc (ST(items)));
1019
1020	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1021	sv = av_pop ((AV *)SvRV (returnstk));
1022	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
1023	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
1024	SvREFCNT_dec (sv);
1025
1026	transfer(aTHX_ prev, next, 0);
1027		1618
1028	MODULE = Coro::State PACKAGE = Coro	1619	MODULE = Coro::State PACKAGE = Coro
1029		1620
1030	# this is slightly dirty (should expose a c-level api)
1031
1032	BOOT:	1621	BOOT:
1033	{	1622	{
1034	int i;	1623	int i;
		1624
		1625	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1626	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1627	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1628
		1629	coro_current = get_sv ("Coro::current", FALSE);
		1630	SvREADONLY_on (coro_current);
		1631
1035	HV *stash = gv_stashpv ("Coro", TRUE);	1632	coro_stash = gv_stashpv ("Coro", TRUE);
1036		1633
1037	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1634	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1038	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1635	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1039	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1636	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1040	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1637	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1041	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1638	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1042	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1639	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1043
1044	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1045	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1046		1640
1047	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1641	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1048	coro_ready[i] = newAV ();	1642	coro_ready[i] = newAV ();
1049		1643
1050	{	1644	{
1051	SV *sv = perl_get_sv("Coro::API", 1);	1645	SV *sv = perl_get_sv("Coro::API", 1);
1052		1646
1053	coroapi.schedule = api_schedule;	1647	coroapi.schedule = api_schedule;
1054	coroapi.cede = api_cede;	1648	coroapi.cede = api_cede;
		1649	coroapi.cede_notself = api_cede_notself;
1055	coroapi.ready = api_ready;	1650	coroapi.ready = api_ready;
		1651	coroapi.is_ready = api_is_ready;
1056	coroapi.nready = &coro_nready;	1652	coroapi.nready = &coro_nready;
1057	coroapi.current = coro_current;	1653	coroapi.current = coro_current;
1058		1654
1059	GCoroAPI = &coroapi;	1655	GCoroAPI = &coroapi;
1060	sv_setiv(sv, (IV)&coroapi);	1656	sv_setiv (sv, (IV)&coroapi);
1061	SvREADONLY_on(sv);	1657	SvREADONLY_on (sv);
1062	}	1658	}
1063	}	1659	}
1064		1660
1065	void	1661	void
1066	ready(self)	1662	_set_current (SV *current)
1067	SV * self
1068	PROTOTYPE: $	1663	PROTOTYPE: $
1069	CODE:	1664	CODE:
1070	api_ready (self);	1665	SvREFCNT_dec (SvRV (coro_current));
		1666	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1071		1667
1072	int	1668	int
		1669	prio (Coro::State coro, int newprio = 0)
		1670	ALIAS:
		1671	nice = 1
		1672	CODE:
		1673	{
		1674	RETVAL = coro->prio;
		1675
		1676	if (items > 1)
		1677	{
		1678	if (ix)
		1679	newprio = coro->prio - newprio;
		1680
		1681	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1682	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1683
		1684	coro->prio = newprio;
		1685	}
		1686	}
		1687	OUTPUT:
		1688	RETVAL
		1689
		1690	SV *
		1691	ready (SV *self)
		1692	PROTOTYPE: $
		1693	CODE:
		1694	RETVAL = boolSV (api_ready (self));
		1695	OUTPUT:
		1696	RETVAL
		1697
		1698	int
1073	nready(...)	1699	nready (...)
1074	PROTOTYPE:	1700	PROTOTYPE:
1075	CODE:	1701	CODE:
1076	RETVAL = coro_nready;	1702	RETVAL = coro_nready;
1077	OUTPUT:	1703	OUTPUT:
1078	RETVAL	1704	RETVAL
1079		1705
		1706	# for async_pool speedup
1080	void	1707	void
1081	schedule(...)	1708	_pool_1 (SV *cb)
1082	PROTOTYPE:
1083	CODE:	1709	CODE:
1084	api_schedule ();	1710	{
		1711	int i, len;
		1712	HV hv = (HV )SvRV (coro_current);
		1713	AV *defav = GvAV (PL_defgv);
		1714	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1715	AV *invoke_av;
		1716
		1717	if (!invoke)
		1718	croak ("\3terminate\2\n");
		1719
		1720	hv_store (hv, "desc", sizeof ("desc") - 1,
		1721	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1722
		1723	invoke_av = (AV *)SvRV (invoke);
		1724	len = av_len (invoke_av);
		1725
		1726	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1727
		1728	if (len > 0)
		1729	{
		1730	av_fill (defav, len - 1);
		1731	for (i = 0; i < len; ++i)
		1732	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1733	}
		1734
		1735	SvREFCNT_dec (invoke);
		1736	}
1085		1737
1086	void	1738	void
1087	cede(...)	1739	_pool_2 (SV *cb)
1088	PROTOTYPE:
1089	CODE:	1740	CODE:
1090	api_cede ();	1741	{
		1742	struct coro *coro = SvSTATE (coro_current);
1091		1743
		1744	sv_setsv (cb, &PL_sv_undef);
		1745
		1746	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1747	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1748	croak ("\3terminate\2\n");
		1749
		1750	av_clear (GvAV (PL_defgv));
		1751	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1752	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1753
		1754	coro->prio = 0;
		1755
		1756	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1757	api_trace (coro_current, 0);
		1758
		1759	av_push (av_async_pool, newSVsv (coro_current));
		1760	}
		1761
		1762
		1763	MODULE = Coro::State PACKAGE = Coro::AIO
		1764
		1765	SV *
		1766	_get_state ()
		1767	CODE:
		1768	{
		1769	struct io_state *data;
		1770
		1771	RETVAL = newSV (sizeof (struct io_state));
		1772	data = (struct io_state *)SvPVX (RETVAL);
		1773	SvCUR_set (RETVAL, sizeof (struct io_state));
		1774	SvPOK_only (RETVAL);
		1775
		1776	data->errorno = errno;
		1777	data->laststype = PL_laststype;
		1778	data->laststatval = PL_laststatval;
		1779	data->statcache = PL_statcache;
		1780	}
		1781	OUTPUT:
		1782	RETVAL
		1783
		1784	void
		1785	_set_state (char *data_)
		1786	PROTOTYPE: $
		1787	CODE:
		1788	{
		1789	struct io_state data = (void )data_;
		1790
		1791	errno = data->errorno;
		1792	PL_laststype = data->laststype;
		1793	PL_laststatval = data->laststatval;
		1794	PL_statcache = data->statcache;
		1795	}
		1796

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Comparing Coro/Coro/State.xs (file contents): Revision 1.40 by root, Tue Nov 27 01:41:41 2001 UTC vs. Revision 1.180 by root, Wed Oct 3 17:12:20 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.40 by root, Tue Nov 27 01:41:41 2001 UTC vs.
Revision 1.180 by root, Wed Oct 3 17:12:20 2007 UTC