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Comparing Coro/Coro/State.xs (file contents):
Revision 1.63 by root, Mon Mar 21 14:35:22 2005 UTC vs.
Revision 1.193 by root, Fri Oct 5 23:38:40 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PATCHLEVEL < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# 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
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <signal.h>	75	/* 5.8.7 */
33		76	#ifndef SvRV_set
34	#ifdef HAVE_MMAP	77	# define SvRV_set(s,v) SvRV(s) = (v)
35	# include <unistd.h>
36	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS
38	# ifdef MAP_ANON
39	# define MAP_ANONYMOUS MAP_ANON
40	# else
41	# undef HAVE_MMAP
42	# endif
43	# endif	78	#endif
44	#endif
45		79
46	#define SUB_INIT "Coro::State::initialize"	80	/* 5.8.8 */
47	#define UCORO_STATE "_coro_state"	81	#ifndef GV_NOTQUAL
		82	# define GV_NOTQUAL 0
		83	#endif
		84	#ifndef newSV
		85	# define newSV(l) NEWSV(0,l)
		86	#endif
48		87
49	/* The next macro should declare a variable stacklevel that contains and approximation	88	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
50	* to the current C stack pointer. Its property is that it changes with each call	89	# undef CORO_STACKGUARD
51	* and should be unique. */	90	#endif
		91
		92	#ifndef CORO_STACKGUARD
		93	# define CORO_STACKGUARD 0
		94	#endif
		95
		96	/* prefer perl internal functions over our own? */
		97	#ifndef CORO_PREFER_PERL_FUNCTIONS
		98	# define CORO_PREFER_PERL_FUNCTIONS 0
		99	#endif
		100
		101	/* The next macros try to return the current stack pointer, in an as
		102	* portable way as possible. */
		103	#define dSTACKLEVEL volatile char stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	104	#define STACKLEVEL ((void *)&stacklevel)
53		105
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	106	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		107
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	108	#if __GNUC__ >= 3
		109	# define attribute(x) __attribute__(x)
		110	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		111	#else
		112	# define attribute(x)
		113	# define BARRIER
		114	#endif
		115
		116	#define NOINLINE attribute ((noinline))
57		117
58	#include "CoroAPI.h"	118	#include "CoroAPI.h"
59		119
60	#ifdef USE_ITHREADS	120	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	121	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	122	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	123	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	124	#else
65	# define LOCK 0	125	# define LOCK (void)0
66	# define UNLOCK 0	126	# define UNLOCK (void)0
67	#endif	127	#endif
68		128
		129	/* helper storage struct for Coro::AIO */
		130	struct io_state
		131	{
		132	int errorno;
		133	I32 laststype;
		134	int laststatval;
		135	Stat_t statcache;
		136	};
		137
		138	static size_t coro_stacksize = CORO_STACKSIZE;
69	static struct CoroAPI coroapi;	139	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	140	static AV *main_mainstack; /* used to differentiate between $main and others */
		141	static JMPENV *main_top_env;
71	static HV *coro_state_stash;	142	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV *coro_mortal; /* will be freed after next transfer */	143	static SV *coro_mortal; /* will be freed after next transfer */
75		144
76	/* this is actually not only the c stack but also c registers etc... */	145	static GV *irsgv; /* $/ */
		146	static GV *stdoutgv; /* *STDOUT */
		147
		148	/* async_pool helper stuff */
		149	static SV *sv_pool_rss;
		150	static SV *sv_pool_size;
		151	static AV *av_async_pool;
		152
		153	static struct coro_cctx *cctx_first;
		154	static int cctx_count, cctx_idle;
		155
		156	enum {
		157	CC_MAPPED = 0x01,
		158	CC_NOREUSE = 0x02, /* throw this away after tracing */
		159	CC_TRACE = 0x04,
		160	CC_TRACE_SUB = 0x08, /* trace sub calls */
		161	CC_TRACE_LINE = 0x10, /* trace each statement */
		162	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		163	};
		164
		165	/* this is a structure representing a c-level coroutine */
77	typedef struct {	166	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	167	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		168
		169	/* the stack */
		170	void *sptr;
		171	size_t ssize;
		172
		173	/* cpu state */
		174	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		175	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		176	JMPENV *top_env;
82	coro_context cctx;	177	coro_context cctx;
83		178
84	void *sptr;	179	#if CORO_USE_VALGRIND
85	long ssize; /* positive == mmap, otherwise malloc */	180	int valgrind_id;
86	} coro_stack;	181	#endif
		182	unsigned char flags;
		183	} coro_cctx;
87		184
		185	enum {
		186	CF_RUNNING = 0x0001, /* coroutine is running */
		187	CF_READY = 0x0002, /* coroutine is ready */
		188	CF_NEW = 0x0004, /* has never been switched to */
		189	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		190	};
		191
		192	/* this is a structure representing a perl-level coroutine */
88	struct coro {	193	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	194	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	195	coro_cctx *cctx;
91
92	/* the optional C context */
93	coro_stack *stack;
94	void *cursp;
95	int gencnt;
96
97	/* optionally saved, might be zero */
98	AV *defav;
99	SV *defsv;
100	SV *errsv;
101
102	/* saved global state not related to stacks */
103	U8 dowarn;
104	I32 in_eval;
105
106	/* the stacks and related info (callchain etc..) */
107	PERL_SI *curstackinfo;
108	AV *curstack;
109	AV *mainstack;
110	SV **stack_sp;
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	CV *compcv;
115	SV **stack_base;
116	SV **stack_max;
117	SV **tmps_stack;
118	I32 tmps_floor;
119	I32 tmps_ix;
120	I32 tmps_max;
121	I32 *markstack;
122	I32 *markstack_ptr;
123	I32 *markstack_max;
124	I32 *scopestack;
125	I32 scopestack_ix;
126	I32 scopestack_max;
127	ANY *savestack;
128	I32 savestack_ix;
129	I32 savestack_max;
130	OP **retstack;
131	I32 retstack_ix;
132	I32 retstack_max;
133	COP *curcop;
134	JMPENV *top_env;
135		196
136	/* data associated with this coroutine (initial args) */	197	/* data associated with this coroutine (initial args) */
137	AV *args;	198	AV *args;
		199	int refcnt;
		200	int flags; /* CF_ flags */
		201
		202	/* optionally saved, might be zero */
		203	AV *defav; /* @_ */
		204	SV *defsv; /* $_ */
		205	SV *errsv; /* $@ */
		206	SV *deffh; /* default filehandle */
		207	SV *irssv; /* $/ */
		208	SV *irssv_sv; /* real $/ cache */
		209
		210	#define VAR(name,type) type name;
		211	# include "state.h"
		212	#undef VAR
		213
		214	/* statistics */
		215	int usecount; /* number of transfers to this coro */
		216
		217	/* coro process data */
		218	int prio;
		219	//SV *throw;
		220
		221	/* async_pool */
		222	SV *saved_deffh;
		223
		224	/* linked list */
		225	struct coro *next, *prev;
		226	HV *hv; /* the perl hash associated with this coro, if any */
138	};	227	};
139		228
140	typedef struct coro *Coro__State;	229	typedef struct coro *Coro__State;
141	typedef struct coro *Coro__State_or_hashref;	230	typedef struct coro *Coro__State_or_hashref;
142		231
143	/* mostly copied from op.c:cv_clone2 */	232	/** Coro ********************************************************************/
144	STATIC AV *	233
145	clone_padlist (pTHX_ AV *protopadlist)	234	#define PRIO_MAX 3
		235	#define PRIO_HIGH 1
		236	#define PRIO_NORMAL 0
		237	#define PRIO_LOW -1
		238	#define PRIO_IDLE -3
		239	#define PRIO_MIN -4
		240
		241	/* for Coro.pm */
		242	static SV *coro_current;
		243	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		244	static int coro_nready;
		245	static struct coro *coro_first;
		246
		247	/** lowlevel stuff **********************************************************/
		248
		249	static AV *
		250	coro_clone_padlist (pTHX_ CV *cv)
146	{	251	{
147	AV *av;	252	AV *padlist = CvPADLIST (cv);
148	I32 ix;
149	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
150	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
151	SV **pname = AvARRAY (protopad_name);
152	SV **ppad = AvARRAY (protopad);
153	I32 fname = AvFILLp (protopad_name);
154	I32 fpad = AvFILLp (protopad);
155	AV *newpadlist, *newpad_name, *newpad;	253	AV *newpadlist, *newpad;
156	SV **npad;
157
158	newpad_name = newAV ();
159	for (ix = fname; ix >= 0; ix--)
160	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
161
162	newpad = newAV ();
163	av_fill (newpad, AvFILLp (protopad));
164	npad = AvARRAY (newpad);
165		254
166	newpadlist = newAV ();	255	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	256	AvREAL_off (newpadlist);
168	av_store (newpadlist, 0, (SV *) newpad_name);	257	#if PERL_VERSION_ATLEAST (5,9,0)
		258	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		259	#else
		260	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		261	#endif
		262	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		263	--AvFILLp (padlist);
		264
		265	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
169	av_store (newpadlist, 1, (SV *) newpad);	266	av_store (newpadlist, 1, (SV *)newpad);
170
171	av = newAV (); /* will be @_ */
172	av_extend (av, 0);
173	av_store (newpad, 0, (SV *) av);
174	AvFLAGS (av) = AVf_REIFY;
175
176	for (ix = fpad; ix > 0; ix--)
177	{
178	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
179
180	if (namesv && namesv != &PL_sv_undef)
181	{
182	char *name = SvPVX (namesv); /* XXX */
183
184	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
185	{ /* lexical from outside? */
186	npad[ix] = SvREFCNT_inc (ppad[ix]);
187	}
188	else
189	{ /* our own lexical */
190	SV *sv;
191	if (*name == '&')
192	sv = SvREFCNT_inc (ppad[ix]);
193	else if (*name == '@')
194	sv = (SV *) newAV ();
195	else if (*name == '%')
196	sv = (SV *) newHV ();
197	else
198	sv = NEWSV (0, 0);
199
200	#ifdef SvPADBUSY
201	if (!SvPADBUSY (sv))
202	#endif
203	SvPADMY_on (sv);
204
205	npad[ix] = sv;
206	}
207	}
208	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
209	{
210	npad[ix] = SvREFCNT_inc (ppad[ix]);
211	}
212	else
213	{
214	SV *sv = NEWSV (0, 0);
215	SvPADTMP_on (sv);
216	npad[ix] = sv;
217	}
218	}
219
220	#if 0 /* return -ENOTUNDERSTOOD */
221	/* Now that vars are all in place, clone nested closures. */
222
223	for (ix = fpad; ix > 0; ix--) {
224	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
225	if (namesv
226	&& namesv != &PL_sv_undef
227	&& !(SvFLAGS(namesv) & SVf_FAKE)
228	&& *SvPVX(namesv) == '&'
229	&& CvCLONE(ppad[ix]))
230	{
231	CV *kid = cv_clone((CV*)ppad[ix]);
232	SvREFCNT_dec(ppad[ix]);
233	CvCLONE_on(kid);
234	SvPADMY_on(kid);
235	npad[ix] = (SV*)kid;
236	}
237	}
238	#endif
239		267
240	return newpadlist;	268	return newpadlist;
241	}	269	}
242		270
243	STATIC void	271	static void
244	free_padlist (pTHX_ AV *padlist)	272	free_padlist (pTHX_ AV *padlist)
245	{	273	{
246	/* may be during global destruction */	274	/* may be during global destruction */
247	if (SvREFCNT (padlist))	275	if (SvREFCNT (padlist))
248	{	276	{
…		…
262		290
263	SvREFCNT_dec ((SV*)padlist);	291	SvREFCNT_dec ((SV*)padlist);
264	}	292	}
265	}	293	}
266		294
267	STATIC int	295	static int
268	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	296	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
269	{	297	{
270	AV *padlist;	298	AV *padlist;
271	AV *av = (AV *)mg->mg_obj;	299	AV *av = (AV *)mg->mg_obj;
272		300
273	/* casting is fun. */	301	/* casting is fun. */
274	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	302	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275	free_padlist (aTHX_ padlist);	303	free_padlist (aTHX_ padlist);
276		304
277	SvREFCNT_dec (av);	305	SvREFCNT_dec (av);
		306
		307	return 0;
278	}	308	}
279		309
280	#define PERL_MAGIC_coro PERL_MAGIC_ext	310	#define PERL_MAGIC_coro PERL_MAGIC_ext
281		311
282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	312	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
283		313
		314	#define CORO_MAGIC(cv) \
		315	SvMAGIC (cv) \
		316	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		317	? SvMAGIC (cv) \
		318	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		319	: 0
		320
		321	static struct coro *
		322	SvSTATE_ (pTHX_ SV *coro)
		323	{
		324	HV *stash;
		325	MAGIC *mg;
		326
		327	if (SvROK (coro))
		328	coro = SvRV (coro);
		329
		330	if (SvTYPE (coro) != SVt_PVHV)
		331	croak ("Coro::State object required");
		332
		333	stash = SvSTASH (coro);
		334	if (stash != coro_stash && stash != coro_state_stash)
		335	{
		336	/* very slow, but rare, check */
		337	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		338	croak ("Coro::State object required");
		339	}
		340
		341	mg = CORO_MAGIC (coro);
		342	return (struct coro *)mg->mg_ptr;
		343	}
		344
		345	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		346
284	/* the next two functions merely cache the padlists */	347	/* the next two functions merely cache the padlists */
285	STATIC void	348	static void
286	get_padlist (pTHX_ CV *cv)	349	get_padlist (pTHX_ CV *cv)
287	{	350	{
288	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	351	MAGIC *mg = CORO_MAGIC (cv);
		352	AV *av;
289		353
290	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	354	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
291	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	355	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
292	else	356	else
		357	{
		358	#if CORO_PREFER_PERL_FUNCTIONS
		359	/* this is probably cleaner, but also slower? */
		360	CV *cp = Perl_cv_clone (cv);
		361	CvPADLIST (cv) = CvPADLIST (cp);
		362	CvPADLIST (cp) = 0;
		363	SvREFCNT_dec (cp);
		364	#else
293	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	365	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		366	#endif
		367	}
294	}	368	}
295		369
296	STATIC void	370	static void
297	put_padlist (pTHX_ CV *cv)	371	put_padlist (pTHX_ CV *cv)
298	{	372	{
299	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	373	MAGIC *mg = CORO_MAGIC (cv);
		374	AV *av;
300		375
301	if (!mg)	376	if (!mg)
302	{	377	{
303	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	378	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
304	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	379	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
305	mg->mg_virtual = &vtbl_coro;	380	mg->mg_virtual = &vtbl_coro;
306	mg->mg_obj = (SV *)newAV ();	381	mg->mg_obj = (SV *)newAV ();
307	}	382	}
308		383
309	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	384	av = (AV *)mg->mg_obj;
310	}
311		385
312	#define SB do {	386	if (AvFILLp (av) >= AvMAX (av))
313	#define SE } while (0)	387	av_extend (av, AvMAX (av) + 1);
314		388
315	#define LOAD(state) load_state(aTHX_ (state));	389	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
316	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	390	}
317		391
318	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	392	/** load & save, init *******************************************************/
319		393
320	static void	394	static void
321	load_state(pTHX_ Coro__State c)	395	load_perl (pTHX_ Coro__State c)
322	{	396	{
323	PL_dowarn = c->dowarn;	397	#define VAR(name,type) PL_ ## name = c->name;
324	PL_in_eval = c->in_eval;	398	# include "state.h"
		399	#undef VAR
325		400
326	PL_curstackinfo = c->curstackinfo;	401	GvSV (PL_defgv) = c->defsv;
327	PL_curstack = c->curstack;	402	GvAV (PL_defgv) = c->defav;
328	PL_mainstack = c->mainstack;	403	GvSV (PL_errgv) = c->errsv;
329	PL_stack_sp = c->stack_sp;	404	GvSV (irsgv) = c->irssv_sv;
330	PL_op = c->op;
331	PL_curpad = c->curpad;
332	PL_comppad = c->comppad;
333	PL_compcv = c->compcv;
334	PL_stack_base = c->stack_base;
335	PL_stack_max = c->stack_max;
336	PL_tmps_stack = c->tmps_stack;
337	PL_tmps_floor = c->tmps_floor;
338	PL_tmps_ix = c->tmps_ix;
339	PL_tmps_max = c->tmps_max;
340	PL_markstack = c->markstack;
341	PL_markstack_ptr = c->markstack_ptr;
342	PL_markstack_max = c->markstack_max;
343	PL_scopestack = c->scopestack;
344	PL_scopestack_ix = c->scopestack_ix;
345	PL_scopestack_max = c->scopestack_max;
346	PL_savestack = c->savestack;
347	PL_savestack_ix = c->savestack_ix;
348	PL_savestack_max = c->savestack_max;
349	PL_retstack = c->retstack;
350	PL_retstack_ix = c->retstack_ix;
351	PL_retstack_max = c->retstack_max;
352	PL_curcop = c->curcop;
353	PL_top_env = c->top_env;
354
355	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
356	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
357	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
358		405
359	{	406	{
360	dSP;	407	dSP;
361	CV *cv;	408	CV *cv;
362		409
363	/* now do the ugly restore mess */	410	/* now do the ugly restore mess */
364	while ((cv = (CV *)POPs))	411	while ((cv = (CV *)POPs))
365	{	412	{
366	AV *padlist = (AV *)POPs;
367
368	if (padlist)
369	{
370	put_padlist (aTHX_ cv); /* mark this padlist as available */	413	put_padlist (aTHX_ cv); /* mark this padlist as available */
371	CvPADLIST(cv) = padlist;	414	CvDEPTH (cv) = PTR2IV (POPs);
372	}	415	CvPADLIST (cv) = (AV *)POPs;
373
374	++CvDEPTH(cv);
375	}	416	}
376		417
377	PUTBACK;	418	PUTBACK;
378	}	419	}
379	}	420	}
380		421
381	static void	422	static void
382	save_state(pTHX_ Coro__State c, int flags)	423	save_perl (pTHX_ Coro__State c)
383	{	424	{
384	{	425	{
385	dSP;	426	dSP;
386	I32 cxix = cxstack_ix;	427	I32 cxix = cxstack_ix;
387	PERL_CONTEXT *ccstk = cxstack;	428	PERL_CONTEXT *ccstk = cxstack;
…		…
390	/*	431	/*
391	* the worst thing you can imagine happens first - we have to save	432	* the worst thing you can imagine happens first - we have to save
392	* (and reinitialize) all cv's in the whole callchain :(	433	* (and reinitialize) all cv's in the whole callchain :(
393	*/	434	*/
394		435
395	PUSHs (Nullsv);	436	XPUSHs (Nullsv);
396	/* this loop was inspired by pp_caller */	437	/* this loop was inspired by pp_caller */
397	for (;;)	438	for (;;)
398	{	439	{
399	while (cxix >= 0)	440	while (cxix >= 0)
400	{	441	{
401	PERL_CONTEXT *cx = &ccstk[cxix--];	442	PERL_CONTEXT *cx = &ccstk[cxix--];
402		443
403	if (CxTYPE(cx) == CXt_SUB)	444	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
404	{	445	{
405	CV *cv = cx->blk_sub.cv;	446	CV *cv = cx->blk_sub.cv;
		447
406	if (CvDEPTH(cv))	448	if (CvDEPTH (cv))
407	{	449	{
408	EXTEND (SP, CvDEPTH(cv)*2);	450	EXTEND (SP, 3);
409
410	while (--CvDEPTH(cv))
411	{
412	/* this tells the restore code to increment CvDEPTH */
413	PUSHs (Nullsv);
414	PUSHs ((SV *)cv);
415	}
416
417	PUSHs ((SV *)CvPADLIST(cv));	451	PUSHs ((SV *)CvPADLIST (cv));
		452	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
418	PUSHs ((SV *)cv);	453	PUSHs ((SV *)cv);
419		454
		455	CvDEPTH (cv) = 0;
420	get_padlist (aTHX_ cv); /* this is a monster */	456	get_padlist (aTHX_ cv);
421	}	457	}
422	}	458	}
423	#ifdef CXt_FORMAT
424	else if (CxTYPE(cx) == CXt_FORMAT)
425	{
426	/* I never used formats, so how should I know how these are implemented? */
427	/* my bold guess is as a simple, plain sub... */
428	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
429	}
430	#endif
431	}	459	}
432		460
433	if (top_si->si_type == PERLSI_MAIN)	461	if (top_si->si_type == PERLSI_MAIN)
434	break;	462	break;
435		463
436	top_si = top_si->si_prev;	464	top_si = top_si->si_prev;
437	ccstk = top_si->si_cxstack;	465	ccstk = top_si->si_cxstack;
438	cxix = top_si->si_cxix;	466	cxix = top_si->si_cxix;
439	}	467	}
440		468
441	PUTBACK;	469	PUTBACK;
442	}	470	}
443		471
444	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	472	c->defav = GvAV (PL_defgv);
445	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	473	c->defsv = DEFSV;
446	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	474	c->errsv = ERRSV;
		475	c->irssv_sv = GvSV (irsgv);
447		476
448	c->dowarn = PL_dowarn;	477	#define VAR(name,type)c->name = PL_ ## name;
449	c->in_eval = PL_in_eval;	478	# include "state.h"
450		479	#undef VAR
451	c->curstackinfo = PL_curstackinfo;
452	c->curstack = PL_curstack;
453	c->mainstack = PL_mainstack;
454	c->stack_sp = PL_stack_sp;
455	c->op = PL_op;
456	c->curpad = PL_curpad;
457	c->comppad = PL_comppad;
458	c->compcv = PL_compcv;
459	c->stack_base = PL_stack_base;
460	c->stack_max = PL_stack_max;
461	c->tmps_stack = PL_tmps_stack;
462	c->tmps_floor = PL_tmps_floor;
463	c->tmps_ix = PL_tmps_ix;
464	c->tmps_max = PL_tmps_max;
465	c->markstack = PL_markstack;
466	c->markstack_ptr = PL_markstack_ptr;
467	c->markstack_max = PL_markstack_max;
468	c->scopestack = PL_scopestack;
469	c->scopestack_ix = PL_scopestack_ix;
470	c->scopestack_max = PL_scopestack_max;
471	c->savestack = PL_savestack;
472	c->savestack_ix = PL_savestack_ix;
473	c->savestack_max = PL_savestack_max;
474	c->retstack = PL_retstack;
475	c->retstack_ix = PL_retstack_ix;
476	c->retstack_max = PL_retstack_max;
477	c->curcop = PL_curcop;
478	c->top_env = PL_top_env;
479	}	480	}
480		481
481	/*	482	/*
482	* allocate various perl stacks. This is an exact copy	483	* allocate various perl stacks. This is an exact copy
483	* of perl.c:init_stacks, except that it uses less memory	484	* of perl.c:init_stacks, except that it uses less memory
484	* on the (sometimes correct) assumption that coroutines do	485	* on the (sometimes correct) assumption that coroutines do
485	* not usually need a lot of stackspace.	486	* not usually need a lot of stackspace.
486	*/	487	*/
487	STATIC void	488	#if CORO_PREFER_PERL_FUNCTIONS
		489	# define coro_init_stacks init_stacks
		490	#else
		491	static void
488	coro_init_stacks (pTHX)	492	coro_init_stacks (pTHX)
489	{	493	{
490	LOCK;	494	PL_curstackinfo = new_stackinfo(64, 6);
491
492	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
493	PL_curstackinfo->si_type = PERLSI_MAIN;	495	PL_curstackinfo->si_type = PERLSI_MAIN;
494	PL_curstack = PL_curstackinfo->si_stack;	496	PL_curstack = PL_curstackinfo->si_stack;
495	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	497	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496		498
497	PL_stack_base = AvARRAY(PL_curstack);	499	PL_stack_base = AvARRAY(PL_curstack);
498	PL_stack_sp = PL_stack_base;	500	PL_stack_sp = PL_stack_base;
499	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	501	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
500		502
501	New(50,PL_tmps_stack,96,SV*);	503	New(50,PL_tmps_stack,64,SV*);
502	PL_tmps_floor = -1;	504	PL_tmps_floor = -1;
503	PL_tmps_ix = -1;	505	PL_tmps_ix = -1;
504	PL_tmps_max = 96;	506	PL_tmps_max = 64;
505		507
506	New(54,PL_markstack,16,I32);	508	New(54,PL_markstack,16,I32);
507	PL_markstack_ptr = PL_markstack;	509	PL_markstack_ptr = PL_markstack;
508	PL_markstack_max = PL_markstack + 16;	510	PL_markstack_max = PL_markstack + 16;
509		511
…		…
513		515
514	New(54,PL_scopestack,16,I32);	516	New(54,PL_scopestack,16,I32);
515	PL_scopestack_ix = 0;	517	PL_scopestack_ix = 0;
516	PL_scopestack_max = 16;	518	PL_scopestack_max = 16;
517		519
518	New(54,PL_savestack,96,ANY);	520	New(54,PL_savestack,64,ANY);
519	PL_savestack_ix = 0;	521	PL_savestack_ix = 0;
520	PL_savestack_max = 96;	522	PL_savestack_max = 64;
521		523
		524	#if !PERL_VERSION_ATLEAST (5,9,0)
522	New(54,PL_retstack,8,OP*);	525	New(54,PL_retstack,4,OP*);
523	PL_retstack_ix = 0;	526	PL_retstack_ix = 0;
524	PL_retstack_max = 8;	527	PL_retstack_max = 4;
525		528	#endif
526	UNLOCK;
527	}	529	}
		530	#endif
528		531
529	/*	532	/*
530	* destroy the stacks, the callchain etc...	533	* destroy the stacks, the callchain etc...
531	*/	534	*/
532	STATIC void	535	static void
533	destroy_stacks(pTHX)	536	coro_destroy_stacks (pTHX)
534	{	537	{
535	if (!IN_DESTRUCT)
536	{
537	/* is this ugly, I ask? */
538	LEAVE_SCOPE (0);
539
540	/* sure it is, but more important: is it correct?? :/ */
541	FREETMPS;
542
543	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
544	}
545
546	while (PL_curstackinfo->si_next)	538	while (PL_curstackinfo->si_next)
547	PL_curstackinfo = PL_curstackinfo->si_next;	539	PL_curstackinfo = PL_curstackinfo->si_next;
548		540
549	while (PL_curstackinfo)	541	while (PL_curstackinfo)
550	{	542	{
551	PERL_SI *p = PL_curstackinfo->si_prev;	543	PERL_SI *p = PL_curstackinfo->si_prev;
552		544
553	{ /*D*//*remove*/
554	dSP;
555	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
556	PUTBACK; /* possibly superfluous */
557	}
558
559	if (!IN_DESTRUCT)	545	if (!IN_DESTRUCT)
560	{
561	dounwind (-1);/*D*//*remove*/
562	SvREFCNT_dec (PL_curstackinfo->si_stack);	546	SvREFCNT_dec (PL_curstackinfo->si_stack);
563	}
564		547
565	Safefree (PL_curstackinfo->si_cxstack);	548	Safefree (PL_curstackinfo->si_cxstack);
566	Safefree (PL_curstackinfo);	549	Safefree (PL_curstackinfo);
567	PL_curstackinfo = p;	550	PL_curstackinfo = p;
568	}	551	}
569		552
570	Safefree (PL_tmps_stack);	553	Safefree (PL_tmps_stack);
571	Safefree (PL_markstack);	554	Safefree (PL_markstack);
572	Safefree (PL_scopestack);	555	Safefree (PL_scopestack);
573	Safefree (PL_savestack);	556	Safefree (PL_savestack);
		557	#if !PERL_VERSION_ATLEAST (5,9,0)
574	Safefree (PL_retstack);	558	Safefree (PL_retstack);
575	}
576
577	static void
578	allocate_stack (Coro__State ctx, int alloc)
579	{
580	coro_stack *stack;
581
582	New (0, stack, 1, coro_stack);
583
584	stack->refcnt = 1;
585	stack->usecnt = 1;
586	stack->gencnt = ctx->gencnt = 0;
587
588	if (alloc)
589	{
590	#if HAVE_MMAP
591	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
592	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
593	if (stack->sptr == (void *)-1)
594	#endif	559	#endif
		560	}
		561
		562	static size_t
		563	coro_rss (pTHX_ struct coro *coro)
		564	{
		565	size_t rss = sizeof (*coro);
		566
		567	if (coro->mainstack)
		568	{
		569	if (coro->flags & CF_RUNNING)
595	{	570	{
596	/*FIXME*//*D*//* reasonable stack size! */	571	#define VAR(name,type)coro->name = PL_ ## name;
597	stack->ssize = - (8192 * sizeof (long));	572	# include "state.h"
598	New (0, stack->sptr, 8192, long);	573	#undef VAR
599	}	574	}
600	}
601	else
602	stack->sptr = 0;
603		575
604	ctx->stack = stack;	576	rss += sizeof (coro->curstackinfo);
605	}	577	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		578	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		579	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		580	rss += coro->tmps_max * sizeof (SV *);
		581	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		582	rss += coro->scopestack_max * sizeof (I32);
		583	rss += coro->savestack_max * sizeof (ANY);
606		584
607	static void	585	#if !PERL_VERSION_ATLEAST (5,9,0)
608	deallocate_stack (Coro__State ctx)	586	rss += coro->retstack_max * sizeof (OP *);
609	{	587	#endif
610	coro_stack *stack = ctx->stack;
611
612	ctx->stack = 0;
613
614	if (stack)
615	{	588	}
616	if (!--stack->refcnt)
617	{
618	#ifdef HAVE_MMAP
619	if (stack->ssize > 0 && stack->sptr)
620	munmap (stack->sptr, stack->ssize);
621	else
622	#endif
623	Safefree (stack->sptr);
624		589
625	Safefree (stack);	590	return rss;
626	}
627	else if (ctx->gencnt == stack->gencnt)
628	--stack->usecnt;
629	}
630	}	591	}
631		592
		593	/** coroutine stack handling ************************************************/
		594
632	static void	595	static void
633	setup_coro (void *arg)	596	coro_setup (pTHX_ struct coro *coro)
634	{	597	{
635	/*	598	/*
636	* emulate part of the perl startup here.	599	* emulate part of the perl startup here.
637	*/	600	*/
		601	coro_init_stacks (aTHX);
		602
		603	PL_runops = RUNOPS_DEFAULT;
		604	PL_curcop = &PL_compiling;
		605	PL_in_eval = EVAL_NULL;
		606	PL_comppad = 0;
		607	PL_curpm = 0;
		608	PL_localizing = 0;
		609	PL_dirty = 0;
		610	PL_restartop = 0;
		611
		612	GvSV (PL_defgv) = newSV (0);
		613	GvAV (PL_defgv) = coro->args; coro->args = 0;
		614	GvSV (PL_errgv) = newSV (0);
		615	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		616	PL_rs = newSVsv (GvSV (irsgv));
		617	PL_defoutgv = SvREFCNT_inc (stdoutgv);
		618
		619	ENTER; /* necessary e.g. for dounwind */
		620
		621	{
		622	dSP;
		623	LOGOP myop;
		624
		625	Zero (&myop, 1, LOGOP);
		626	myop.op_next = Nullop;
		627	myop.op_flags = OPf_WANT_VOID;
		628
		629	PUSHMARK (SP);
		630	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		631	PUTBACK;
		632	PL_op = (OP *)&myop;
		633	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		634	SPAGAIN;
		635	}
		636	}
		637
		638	static void
		639	coro_destroy (pTHX_ struct coro *coro)
		640	{
		641	if (!IN_DESTRUCT)
		642	{
		643	/* restore all saved variables and stuff */
		644	LEAVE_SCOPE (0);
		645	assert (PL_tmps_floor == -1);
		646
		647	/* free all temporaries */
		648	FREETMPS;
		649	assert (PL_tmps_ix == -1);
		650
		651	/* unwind all extra stacks */
		652	POPSTACK_TO (PL_mainstack);
		653
		654	/* unwind main stack */
		655	dounwind (-1);
		656	}
		657
		658	SvREFCNT_dec (GvSV (PL_defgv));
		659	SvREFCNT_dec (GvAV (PL_defgv));
		660	SvREFCNT_dec (GvSV (PL_errgv));
		661	SvREFCNT_dec (PL_defoutgv);
		662	SvREFCNT_dec (PL_rs);
		663	SvREFCNT_dec (GvSV (irsgv));
		664
		665	SvREFCNT_dec (coro->saved_deffh);
		666	//SvREFCNT_dec (coro->throw);
		667
		668	coro_destroy_stacks (aTHX);
		669	}
		670
		671	static void
		672	free_coro_mortal (pTHX)
		673	{
		674	if (coro_mortal)
		675	{
		676	SvREFCNT_dec (coro_mortal);
		677	coro_mortal = 0;
		678	}
		679	}
		680
		681	static int
		682	runops_trace (pTHX)
		683	{
		684	COP *oldcop = 0;
		685	int oldcxix = -2;
		686	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		687	coro_cctx *cctx = coro->cctx;
		688
		689	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		690	{
		691	PERL_ASYNC_CHECK ();
		692
		693	if (cctx->flags & CC_TRACE_ALL)
		694	{
		695	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		696	{
		697	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		698	SV **bot, **top;
		699	AV *av = newAV (); /* return values */
		700	SV **cb;
		701	dSP;
		702
		703	GV *gv = CvGV (cx->blk_sub.cv);
		704	SV *fullname = sv_2mortal (newSV (0));
		705	if (isGV (gv))
		706	gv_efullname3 (fullname, gv, 0);
		707
		708	bot = PL_stack_base + cx->blk_oldsp + 1;
		709	top = cx->blk_gimme == G_ARRAY ? SP + 1
		710	: cx->blk_gimme == G_SCALAR ? bot + 1
		711	: bot;
		712
		713	av_extend (av, top - bot);
		714	while (bot < top)
		715	av_push (av, SvREFCNT_inc (*bot++));
		716
		717	PL_runops = RUNOPS_DEFAULT;
		718	ENTER;
		719	SAVETMPS;
		720	EXTEND (SP, 3);
		721	PUSHMARK (SP);
		722	PUSHs (&PL_sv_no);
		723	PUSHs (fullname);
		724	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		725	PUTBACK;
		726	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		727	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		728	SPAGAIN;
		729	FREETMPS;
		730	LEAVE;
		731	PL_runops = runops_trace;
		732	}
		733
		734	if (oldcop != PL_curcop)
		735	{
		736	oldcop = PL_curcop;
		737
		738	if (PL_curcop != &PL_compiling)
		739	{
		740	SV **cb;
		741
		742	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		743	{
		744	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		745
		746	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		747	{
		748	runops_proc_t old_runops = PL_runops;
		749	dSP;
		750	GV *gv = CvGV (cx->blk_sub.cv);
		751	SV *fullname = sv_2mortal (newSV (0));
		752
		753	if (isGV (gv))
		754	gv_efullname3 (fullname, gv, 0);
		755
		756	PL_runops = RUNOPS_DEFAULT;
		757	ENTER;
		758	SAVETMPS;
		759	EXTEND (SP, 3);
		760	PUSHMARK (SP);
		761	PUSHs (&PL_sv_yes);
		762	PUSHs (fullname);
		763	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		764	PUTBACK;
		765	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		766	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		767	SPAGAIN;
		768	FREETMPS;
		769	LEAVE;
		770	PL_runops = runops_trace;
		771	}
		772
		773	oldcxix = cxstack_ix;
		774	}
		775
		776	if (cctx->flags & CC_TRACE_LINE)
		777	{
		778	dSP;
		779
		780	PL_runops = RUNOPS_DEFAULT;
		781	ENTER;
		782	SAVETMPS;
		783	EXTEND (SP, 3);
		784	PL_runops = RUNOPS_DEFAULT;
		785	PUSHMARK (SP);
		786	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		787	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		788	PUTBACK;
		789	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		790	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		791	SPAGAIN;
		792	FREETMPS;
		793	LEAVE;
		794	PL_runops = runops_trace;
		795	}
		796	}
		797	}
		798	}
		799	}
		800
		801	TAINT_NOT;
		802	return 0;
		803	}
		804
		805	/* inject a fake call to Coro::State::_cctx_init into the execution */
		806	/* _cctx_init should be careful, as it could be called at almost any time */
		807	/* during execution of a perl program */
		808	static void NOINLINE
		809	prepare_cctx (pTHX_ coro_cctx *cctx)
		810	{
		811	dSP;
		812	LOGOP myop;
		813
		814	PL_top_env = &PL_start_env;
		815
		816	if (cctx->flags & CC_TRACE)
		817	PL_runops = runops_trace;
		818
		819	Zero (&myop, 1, LOGOP);
		820	myop.op_next = PL_op;
		821	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		822
		823	PUSHMARK (SP);
		824	EXTEND (SP, 2);
		825	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		826	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		827	PUTBACK;
		828	PL_op = (OP *)&myop;
		829	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		830	SPAGAIN;
		831	}
		832
		833	/*
		834	* this is a _very_ stripped down perl interpreter ;)
		835	*/
		836	static void
		837	coro_run (void *arg)
		838	{
638	dTHX;	839	dTHX;
639	dSP;
640	Coro__State ctx = (Coro__State)arg;
641	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
642		840
643	coro_init_stacks (aTHX);	841	/* coro_run is the alternative tail of transfer(), so unlock here. */
644	/*PL_curcop = 0;*/	842	UNLOCK;
645	/*PL_in_eval = PL_in_eval;*/ /* inherit */
646	SvREFCNT_dec (GvAV (PL_defgv));
647	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
648		843
649	SPAGAIN;	844	/* we now skip the entersub that lead to transfer() */
		845	PL_op = PL_op->op_next;
650		846
651	if (ctx->stack)	847	/* inject a fake subroutine call to cctx_init */
652	{	848	prepare_cctx (aTHX_ (coro_cctx *)arg);
653	ctx->cursp = 0;
654		849
655	PUSHMARK(SP);	850	/* somebody or something will hit me for both perl_run and PL_restartop */
656	PUTBACK;	851	PL_restartop = PL_op;
657	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	852	perl_run (PL_curinterp);
658		853
659	if (SvTRUE (ERRSV))	854	/*
660	croak (NULL);	855	* If perl-run returns we assume exit() was being called or the coro
661	else	856	* fell off the end, which seems to be the only valid (non-bug)
662	croak ("FATAL: CCTXT coroutine returned!");	857	* reason for perl_run to return. We try to exit by jumping to the
		858	* bootstrap-time "top" top_env, as we cannot restore the "main"
		859	* coroutine as Coro has no such concept
		860	*/
		861	PL_top_env = main_top_env;
		862	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		863	}
		864
		865	static coro_cctx *
		866	cctx_new ()
		867	{
		868	coro_cctx *cctx;
		869	void *stack_start;
		870	size_t stack_size;
		871
		872	++cctx_count;
		873
		874	Newz (0, cctx, 1, coro_cctx);
		875
		876	#if HAVE_MMAP
		877
		878	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		879	/* mmap supposedly does allocate-on-write for us */
		880	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		881
		882	if (cctx->sptr != (void *)-1)
		883	{
		884	# if CORO_STACKGUARD
		885	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		886	# endif
		887	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		888	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		889	cctx->flags |= CC_MAPPED;
663	}	890	}
664	else	891	else
665	{	892	#endif
666	UNOP myop;
667
668	PL_op = (OP *)&myop;
669
670	Zero(&myop, 1, UNOP);
671	myop.op_next = Nullop;
672	myop.op_flags = OPf_WANT_VOID;
673
674	PUSHMARK(SP);
675	XPUSHs (sub_init);
676	/*
677	* the next line is slightly wrong, as PL_op->op_next
678	* is actually being executed so we skip the first op.
679	* that doesn't matter, though, since it is only
680	* pp_nextstate and we never return...
681	* ah yes, and I don't care anyways ;)
682	*/
683	PUTBACK;
684	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685	SPAGAIN;
686
687	ENTER; /* necessary e.g. for dounwind */
688	}	893	{
689	}	894	cctx->ssize = coro_stacksize * (long)sizeof (long);
		895	New (0, cctx->sptr, coro_stacksize, long);
690		896
691	static void	897	if (!cctx->sptr)
692	continue_coro (void *arg)	898	{
693	{	899	perror ("FATAL: unable to allocate stack for coroutine");
694	/*	900	_exit (EXIT_FAILURE);
695	* this is a _very_ stripped down perl interpreter ;)	901	}
696	*/
697	dTHX;
698	Coro__State ctx = (Coro__State)arg;
699	JMPENV coro_start_env;
700		902
701	PL_top_env = &ctx->start_env;	903	stack_start = cctx->sptr;
		904	stack_size = cctx->ssize;
		905	}
702		906
703	ctx->cursp = 0;	907	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
704	PL_op = PL_op->op_next;	908	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
705	CALLRUNOPS(aTHX);
706		909
707	abort ();	910	return cctx;
708	}	911	}
709		912
710	STATIC void	913	static void
		914	cctx_destroy (coro_cctx *cctx)
		915	{
		916	if (!cctx)
		917	return;
		918
		919	--cctx_count;
		920
		921	#if CORO_USE_VALGRIND
		922	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		923	#endif
		924
		925	#if HAVE_MMAP
		926	if (cctx->flags & CC_MAPPED)
		927	munmap (cctx->sptr, cctx->ssize);
		928	else
		929	#endif
		930	Safefree (cctx->sptr);
		931
		932	Safefree (cctx);
		933	}
		934
		935	/* wether this cctx should be destructed */
		936	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		937
		938	static coro_cctx *
		939	cctx_get (pTHX)
		940	{
		941	while (cctx_first)
		942	{
		943	coro_cctx *cctx = cctx_first;
		944	cctx_first = cctx->next;
		945	--cctx_idle;
		946
		947	if (!CCTX_EXPIRED (cctx))
		948	return cctx;
		949
		950	cctx_destroy (cctx);
		951	}
		952
		953	return cctx_new ();
		954	}
		955
		956	static void
		957	cctx_put (coro_cctx *cctx)
		958	{
		959	/* free another cctx if overlimit */
		960	if (cctx_idle >= MAX_IDLE_CCTX)
		961	{
		962	coro_cctx *first = cctx_first;
		963	cctx_first = first->next;
		964	--cctx_idle;
		965
		966	cctx_destroy (first);
		967	}
		968
		969	++cctx_idle;
		970	cctx->next = cctx_first;
		971	cctx_first = cctx;
		972	}
		973
		974	/** coroutine switching *****************************************************/
		975
		976	static void NOINLINE
		977	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		978	{
		979	if (prev != next)
		980	{
		981	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		982	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		983
		984	if (next->flags & CF_RUNNING)
		985	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		986
		987	if (next->flags & CF_DESTROYED)
		988	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		989
		990	if (PL_lex_state != LEX_NOTPARSING)
		991	croak ("Coro::State::transfer called while parsing, but this is not supported");
		992	}
		993	}
		994
		995	/* always use the TRANSFER macro */
		996	static void NOINLINE
711	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	997	transfer (pTHX_ struct coro *prev, struct coro *next)
712	{	998	{
713	dSTACKLEVEL;	999	dSTACKLEVEL;
714		1000
		1001	/* sometimes transfer is only called to set idle_sp */
		1002	if (!next)
		1003	{
		1004	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1005	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1006	}
715	if (prev != next)	1007	else if (prev != next)
716	{	1008	{
717	if (next->mainstack)	1009	coro_cctx *prev__cctx;
		1010
		1011	if (prev->flags & CF_NEW)
718	{	1012	{
719	LOCK;	1013	/* create a new empty context */
720	SAVE (prev, flags);	1014	Newz (0, prev->cctx, 1, coro_cctx);
721	LOAD (next);	1015	prev->flags &= ~CF_NEW;
722	UNLOCK;	1016	prev->flags |= CF_RUNNING;
723
724	/* mark this state as in-use */
725	next->mainstack = 0;
726	next->tmps_ix = -2;
727
728	/* stacklevel changed? if yes, grab the stack for us! */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733	else if (prev->cursp != stacklevel
734	&& prev->stack->usecnt > 1)
735	{
736	prev->gencnt = ++prev->stack->gencnt;
737	prev->stack->usecnt = 1;
738	}
739
740	/* has our stack been invalidated? */
741	if (next->stack && next->stack->gencnt != next->gencnt)
742	{
743	deallocate_stack (next);
744	allocate_stack (next, 1);
745	coro_create (&(next->stack->cctx),
746	continue_coro, (void *)next,
747	next->stack->sptr, labs (next->stack->ssize));
748	}
749
750	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751	prev->cursp = stacklevel;
752	/* don't add any code here */
753	}
754	else
755	next->cursp = stacklevel;
756	}	1017	}
757	else if (next->tmps_ix == -2)	1018
758	croak ("tried to transfer to running coroutine");	1019	prev->flags &= ~CF_RUNNING;
		1020	next->flags |= CF_RUNNING;
		1021
		1022	LOCK;
		1023
		1024	if (next->flags & CF_NEW)
		1025	{
		1026	/* need to start coroutine */
		1027	next->flags &= ~CF_NEW;
		1028	/* first get rid of the old state */
		1029	save_perl (aTHX_ prev);
		1030	/* setup coroutine call */
		1031	coro_setup (aTHX_ next);
		1032	}
759	else	1033	else
760	{	1034	{
761	LOCK;	1035	/* coroutine already started */
762	SAVE (prev, -1); /* first get rid of the old state */	1036	save_perl (aTHX_ prev);
763	UNLOCK;	1037	load_perl (aTHX_ next);
764
765	if (flags & TRANSFER_SAVE_CCTXT)
766	{
767	if (!prev->stack)
768	allocate_stack (prev, 0);
769
770	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
771	{
772	PL_top_env = &next->start_env;
773
774	setup_coro (next);
775	next->cursp = stacklevel;
776
777	prev->stack->refcnt++;
778	prev->stack->usecnt++;
779	next->stack = prev->stack;
780	next->gencnt = prev->gencnt;
781	}
782	else
783	{
784	assert (!next->stack);
785	allocate_stack (next, 1);
786	coro_create (&(next->stack->cctx),
787	setup_coro, (void *)next,
788	next->stack->sptr, labs (next->stack->ssize));
789	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
790	prev->cursp = stacklevel;
791	/* don't add any code here */
792	}
793	}
794	else
795	{
796	setup_coro (next);
797	next->cursp = stacklevel;
798	}
799	}	1038	}
800	}
801		1039
802	LOCK;	1040	prev__cctx = prev->cctx;
803	if (coro_mortal)	1041
804	{	1042	/* possibly "free" the cctx */
805	SvREFCNT_dec (coro_mortal);	1043	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
806	coro_mortal = 0;	1044	{
807	}	1045	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1046	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1047
		1048	prev->cctx = 0;
		1049
		1050	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1051	if (CCTX_EXPIRED (prev__cctx))
		1052	next->cctx = cctx_get (aTHX);
		1053
		1054	cctx_put (prev__cctx);
		1055	}
		1056
		1057	++next->usecount;
		1058
		1059	if (!next->cctx)
		1060	next->cctx = cctx_get (aTHX);
		1061
		1062	if (prev__cctx != next->cctx)
		1063	{
		1064	prev__cctx->top_env = PL_top_env;
		1065	PL_top_env = next->cctx->top_env;
		1066	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1067	}
		1068
		1069	free_coro_mortal (aTHX);
808	UNLOCK;	1070	UNLOCK;
		1071	}
809	}	1072	}
810		1073
811	#define SV_CORO(sv,func) \	1074	struct transfer_args
812	do { \	1075	{
813	if (SvROK (sv)) \	1076	struct coro *prev, *next;
814	sv = SvRV (sv); \	1077	};
815	\
816	if (SvTYPE (sv) == SVt_PVHV) \
817	{ \
818	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
819	\
820	if (!he) \
821	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
822	\
823	(sv) = SvRV (HeVAL(he)); \
824	} \
825	\
826	/* must also be changed inside Coro::Cont::yield */ \
827	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
828	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
829	\
830	} while(0)
831		1078
832	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1079	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1080	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
833		1081
		1082	/** high level stuff ********************************************************/
		1083
834	static void	1084	static int
		1085	coro_state_destroy (pTHX_ struct coro *coro)
		1086	{
		1087	if (coro->flags & CF_DESTROYED)
		1088	return 0;
		1089
		1090	coro->flags |= CF_DESTROYED;
		1091
		1092	if (coro->flags & CF_READY)
		1093	{
		1094	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1095	/* alternative: look through all ready queues and remove the coro */
		1096	LOCK;
		1097	--coro_nready;
		1098	UNLOCK;
		1099	}
		1100	else
		1101	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		1102
		1103	if (coro->mainstack && coro->mainstack != main_mainstack)
		1104	{
		1105	struct coro temp;
		1106
		1107	if (coro->flags & CF_RUNNING)
		1108	croak ("FATAL: tried to destroy currently running coroutine");
		1109
		1110	save_perl (aTHX_ &temp);
		1111	load_perl (aTHX_ coro);
		1112
		1113	coro_destroy (aTHX_ coro);
		1114
		1115	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1116
		1117	coro->mainstack = 0;
		1118	}
		1119
		1120	cctx_destroy (coro->cctx);
		1121	SvREFCNT_dec (coro->args);
		1122
		1123	if (coro->next) coro->next->prev = coro->prev;
		1124	if (coro->prev) coro->prev->next = coro->next;
		1125	if (coro == coro_first) coro_first = coro->next;
		1126
		1127	return 1;
		1128	}
		1129
		1130	static int
		1131	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1132	{
		1133	struct coro *coro = (struct coro *)mg->mg_ptr;
		1134	mg->mg_ptr = 0;
		1135
		1136	coro->hv = 0;
		1137
		1138	if (--coro->refcnt < 0)
		1139	{
		1140	coro_state_destroy (aTHX_ coro);
		1141	Safefree (coro);
		1142	}
		1143
		1144	return 0;
		1145	}
		1146
		1147	static int
		1148	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1149	{
		1150	struct coro *coro = (struct coro *)mg->mg_ptr;
		1151
		1152	++coro->refcnt;
		1153
		1154	return 0;
		1155	}
		1156
		1157	static MGVTBL coro_state_vtbl = {
		1158	0, 0, 0, 0,
		1159	coro_state_free,
		1160	0,
		1161	#ifdef MGf_DUP
		1162	coro_state_dup,
		1163	#else
		1164	# define MGf_DUP 0
		1165	#endif
		1166	};
		1167
		1168	static void
		1169	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1170	{
		1171	ta->prev = SvSTATE (prev_sv);
		1172	ta->next = SvSTATE (next_sv);
		1173	TRANSFER_CHECK (*ta);
		1174	}
		1175
		1176	static void
835	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1177	api_transfer (SV *prev_sv, SV *next_sv)
836	{	1178	{
837	SV_CORO (prev, "Coro::transfer");	1179	dTHX;
838	SV_CORO (next, "Coro::transfer");	1180	struct transfer_args ta;
839		1181
840	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1182	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1183	TRANSFER (ta);
841	}	1184	}
842		1185
843	/** Coro ********************************************************************/	1186	/** Coro ********************************************************************/
844		1187
845	#define PRIO_MAX 3
846	#define PRIO_HIGH 1
847	#define PRIO_NORMAL 0
848	#define PRIO_LOW -1
849	#define PRIO_IDLE -3
850	#define PRIO_MIN -4
851
852	/* for Coro.pm */
853	static GV *coro_current, *coro_idle;
854	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
855	static int coro_nready;
856
857	static void	1188	static void
858	coro_enq (pTHX_ SV *sv)	1189	coro_enq (pTHX_ SV *coro_sv)
859	{	1190	{
860	if (SvTYPE (sv) == SVt_PVHV)
861	{
862	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
863	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
864
865	prio = prio > PRIO_MAX ? PRIO_MAX
866	: prio < PRIO_MIN ? PRIO_MIN
867	: prio;
868
869	av_push (coro_ready [prio - PRIO_MIN], sv);	1191	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
870	coro_nready++;
871
872	return;
873	}
874
875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
876	}	1192	}
877		1193
878	static SV *	1194	static SV *
879	coro_deq (pTHX_ int min_prio)	1195	coro_deq (pTHX_ int min_prio)
880	{	1196	{
…		…
883	min_prio -= PRIO_MIN;	1199	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	1200	if (min_prio < 0)
885	min_prio = 0;	1201	min_prio = 0;
886		1202
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1203	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (av_len (coro_ready[prio]) >= 0)	1204	if (AvFILLp (coro_ready [prio]) >= 0)
889	{
890	coro_nready--;
891	return av_shift (coro_ready[prio]);	1205	return av_shift (coro_ready [prio]);
892	}
893		1206
894	return 0;	1207	return 0;
895	}	1208	}
896		1209
897	static void	1210	static int
898	api_ready (SV *coro)	1211	api_ready (SV *coro_sv)
899	{	1212	{
900	dTHX;	1213	dTHX;
		1214	struct coro *coro;
901		1215
902	if (SvROK (coro))	1216	if (SvROK (coro_sv))
903	coro = SvRV (coro);	1217	coro_sv = SvRV (coro_sv);
		1218
		1219	coro = SvSTATE (coro_sv);
		1220
		1221	if (coro->flags & CF_READY)
		1222	return 0;
		1223
		1224	coro->flags |= CF_READY;
904		1225
905	LOCK;	1226	LOCK;
906	coro_enq (aTHX_ SvREFCNT_inc (coro));	1227	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1228	++coro_nready;
907	UNLOCK;	1229	UNLOCK;
		1230
		1231	return 1;
		1232	}
		1233
		1234	static int
		1235	api_is_ready (SV *coro_sv)
		1236	{
		1237	dTHX;
		1238	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1239	}
		1240
		1241	static void
		1242	prepare_schedule (pTHX_ struct transfer_args *ta)
		1243	{
		1244	SV *prev_sv, *next_sv;
		1245
		1246	for (;;)
		1247	{
		1248	LOCK;
		1249	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1250
		1251	/* nothing to schedule: call the idle handler */
		1252	if (!next_sv)
		1253	{
		1254	dSP;
		1255	UNLOCK;
		1256
		1257	ENTER;
		1258	SAVETMPS;
		1259
		1260	PUSHMARK (SP);
		1261	PUTBACK;
		1262	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1263
		1264	FREETMPS;
		1265	LEAVE;
		1266	continue;
		1267	}
		1268
		1269	ta->next = SvSTATE (next_sv);
		1270
		1271	/* cannot transfer to destroyed coros, skip and look for next */
		1272	if (ta->next->flags & CF_DESTROYED)
		1273	{
		1274	UNLOCK;
		1275	SvREFCNT_dec (next_sv);
		1276	/* coro_nready is already taken care of by destroy */
		1277	continue;
		1278	}
		1279
		1280	--coro_nready;
		1281	UNLOCK;
		1282	break;
		1283	}
		1284
		1285	/* free this only after the transfer */
		1286	prev_sv = SvRV (coro_current);
		1287	ta->prev = SvSTATE (prev_sv);
		1288	TRANSFER_CHECK (*ta);
		1289	assert (ta->next->flags & CF_READY);
		1290	ta->next->flags &= ~CF_READY;
		1291	SvRV_set (coro_current, next_sv);
		1292
		1293	LOCK;
		1294	free_coro_mortal (aTHX);
		1295	coro_mortal = prev_sv;
		1296	UNLOCK;
		1297	}
		1298
		1299	static void
		1300	prepare_cede (pTHX_ struct transfer_args *ta)
		1301	{
		1302	api_ready (coro_current);
		1303	prepare_schedule (aTHX_ ta);
		1304	}
		1305
		1306	static int
		1307	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1308	{
		1309	if (coro_nready)
		1310	{
		1311	SV *prev = SvRV (coro_current);
		1312	prepare_schedule (aTHX_ ta);
		1313	api_ready (prev);
		1314	return 1;
		1315	}
		1316	else
		1317	return 0;
908	}	1318	}
909		1319
910	static void	1320	static void
911	api_schedule (void)	1321	api_schedule (void)
912	{	1322	{
913	dTHX;	1323	dTHX;
		1324	struct transfer_args ta;
914		1325
915	SV *prev, *next;	1326	prepare_schedule (aTHX_ &ta);
916		1327	TRANSFER (ta);
917	LOCK;
918
919	prev = SvRV (GvSV (coro_current));
920	next = coro_deq (aTHX_ PRIO_MIN);
921
922	if (!next)
923	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
924
925	/* free this only after the transfer */
926	coro_mortal = prev;
927	SV_CORO (prev, "Coro::schedule");
928
929	SvRV (GvSV (coro_current)) = next;
930
931	SV_CORO (next, "Coro::schedule");
932
933	UNLOCK;
934
935	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
936	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
937	}	1328	}
938		1329
939	static void	1330	static int
940	api_cede (void)	1331	api_cede (void)
941	{	1332	{
942	dTHX;	1333	dTHX;
		1334	struct transfer_args ta;
943		1335
944	LOCK;	1336	prepare_cede (aTHX_ &ta);
945	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
946	UNLOCK;
947		1337
948	api_schedule ();	1338	if (ta.prev != ta.next)
		1339	{
		1340	TRANSFER (ta);
		1341	return 1;
		1342	}
		1343	else
		1344	return 0;
949	}	1345	}
950		1346
		1347	static int
		1348	api_cede_notself (void)
		1349	{
		1350	dTHX;
		1351	struct transfer_args ta;
		1352
		1353	if (prepare_cede_notself (aTHX_ &ta))
		1354	{
		1355	TRANSFER (ta);
		1356	return 1;
		1357	}
		1358	else
		1359	return 0;
		1360	}
		1361
		1362	static void
		1363	api_trace (SV *coro_sv, int flags)
		1364	{
		1365	dTHX;
		1366	struct coro *coro = SvSTATE (coro_sv);
		1367
		1368	if (flags & CC_TRACE)
		1369	{
		1370	if (!coro->cctx)
		1371	coro->cctx = cctx_new ();
		1372	else if (!(coro->cctx->flags & CC_TRACE))
		1373	croak ("cannot enable tracing on coroutine with custom stack");
		1374
		1375	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1376	}
		1377	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1378	{
		1379	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1380
		1381	if (coro->flags & CF_RUNNING)
		1382	PL_runops = RUNOPS_DEFAULT;
		1383	else
		1384	coro->runops = RUNOPS_DEFAULT;
		1385	}
		1386	}
		1387
951	MODULE = Coro::State PACKAGE = Coro::State	1388	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
952		1389
953	PROTOTYPES: ENABLE	1390	PROTOTYPES: DISABLE
954		1391
955	BOOT:	1392	BOOT:
956	{ /* {} necessary for stoopid perl-5.6.x */	1393	{
957	#ifdef USE_ITHREADS	1394	#ifdef USE_ITHREADS
958	MUTEX_INIT (&coro_mutex);	1395	MUTEX_INIT (&coro_mutex);
959	#endif	1396	#endif
		1397	BOOT_PAGESIZE;
960		1398
961	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1399	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
962	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1400	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1401
963	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1402	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964		1403
965	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1404	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
966	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1405	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
967	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1406	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
968	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1407	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
969		1408
970	main_mainstack = PL_mainstack;	1409	main_mainstack = PL_mainstack;
		1410	main_top_env = PL_top_env;
		1411
		1412	while (main_top_env->je_prev)
		1413	main_top_env = main_top_env->je_prev;
971		1414
972	coroapi.ver = CORO_API_VERSION;	1415	coroapi.ver = CORO_API_VERSION;
973	coroapi.transfer = api_transfer;	1416	coroapi.transfer = api_transfer;
974	}
975		1417
976	Coro::State	1418	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
977	_newprocess(args)	1419	}
978	SV * args	1420
979	PROTOTYPE: $	1421	SV *
		1422	new (char *klass, ...)
980	CODE:	1423	CODE:
981	Coro__State coro;	1424	{
		1425	struct coro *coro;
		1426	HV *hv;
		1427	int i;
982		1428
983	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
984	croak ("Coro::State::_newprocess expects an arrayref");
985
986	Newz (0, coro, 1, struct coro);	1429	Newz (0, coro, 1, struct coro);
		1430	coro->args = newAV ();
		1431	coro->flags = CF_NEW;
987		1432
988	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1433	if (coro_first) coro_first->prev = coro;
989	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1434	coro->next = coro_first;
990	/*coro->stack = 0;*/	1435	coro_first = coro;
991		1436
992	/* same as JMPENV_BOOTSTRAP */	1437	coro->hv = hv = newHV ();
993	/* we might be able to recycle start_env, but safe is safe */	1438	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
994	/*Zero(&coro->start_env, 1, JMPENV);*/	1439	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
995	coro->start_env.je_ret = -1;
996	coro->start_env.je_mustcatch = TRUE;
997		1440
998	RETVAL = coro;	1441	av_extend (coro->args, items - 1);
		1442	for (i = 1; i < items; i++)
		1443	av_push (coro->args, newSVsv (ST (i)));
		1444	}
999	OUTPUT:	1445	OUTPUT:
1000	RETVAL	1446	RETVAL
1001		1447
		1448	# these not obviously related functions are all rolled into the same xs
		1449	# function to increase chances that they all will call transfer with the same
		1450	# stack offset
1002	void	1451	void
1003	transfer(prev, next, flags)	1452	_set_stacklevel (...)
1004	SV *prev	1453	ALIAS:
1005	SV *next	1454	Coro::State::transfer = 1
1006	int flags	1455	Coro::schedule = 2
1007	PROTOTYPE: @	1456	Coro::cede = 3
		1457	Coro::cede_notself = 4
1008	CODE:	1458	CODE:
1009	PUTBACK;	1459	{
1010	SV_CORO (next, "Coro::transfer");	1460	struct transfer_args ta;
1011	SV_CORO (prev, "Coro::transfer");	1461
1012	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1462	switch (ix)
1013	SPAGAIN;	1463	{
		1464	case 0:
		1465	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1466	ta.next = 0;
		1467	break;
		1468
		1469	case 1:
		1470	if (items != 2)
		1471	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1472
		1473	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1474	break;
		1475
		1476	case 2:
		1477	prepare_schedule (aTHX_ &ta);
		1478	break;
		1479
		1480	case 3:
		1481	prepare_cede (aTHX_ &ta);
		1482	break;
		1483
		1484	case 4:
		1485	if (!prepare_cede_notself (aTHX_ &ta))
		1486	XSRETURN_EMPTY;
		1487
		1488	break;
		1489	}
		1490
		1491	BARRIER;
		1492	TRANSFER (ta);
		1493
		1494	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1495	XSRETURN_YES;
		1496	}
		1497
		1498	bool
		1499	_destroy (SV *coro_sv)
		1500	CODE:
		1501	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1502	OUTPUT:
		1503	RETVAL
1014		1504
1015	void	1505	void
1016	DESTROY(coro)
1017	Coro::State coro
1018	CODE:
1019
1020	if (coro->mainstack && coro->mainstack != main_mainstack)
1021	{
1022	struct coro temp;
1023
1024	PUTBACK;
1025	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1026	LOAD (aTHX_ coro);
1027	SPAGAIN;
1028
1029	destroy_stacks (aTHX);
1030
1031	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1032	SPAGAIN;
1033
1034	coro->mainstack = 0;
1035	}
1036
1037	deallocate_stack (coro);
1038	SvREFCNT_dec (coro->args);
1039	Safefree (coro);
1040
1041	void
1042	_exit(code)	1506	_exit (code)
1043	int code	1507	int code
1044	PROTOTYPE: $	1508	PROTOTYPE: $
1045	CODE:	1509	CODE:
1046	_exit (code);	1510	_exit (code);
1047		1511
1048	MODULE = Coro::State PACKAGE = Coro::Cont	1512	int
		1513	cctx_stacksize (int new_stacksize = 0)
		1514	CODE:
		1515	RETVAL = coro_stacksize;
		1516	if (new_stacksize)
		1517	coro_stacksize = new_stacksize;
		1518	OUTPUT:
		1519	RETVAL
1049		1520
1050	# this is slightly dirty (should expose a c-level api)	1521	int
		1522	cctx_count ()
		1523	CODE:
		1524	RETVAL = cctx_count;
		1525	OUTPUT:
		1526	RETVAL
		1527
		1528	int
		1529	cctx_idle ()
		1530	CODE:
		1531	RETVAL = cctx_idle;
		1532	OUTPUT:
		1533	RETVAL
1051		1534
1052	void	1535	void
1053	yield(...)	1536	list ()
1054	PROTOTYPE: @	1537	PPCODE:
		1538	{
		1539	struct coro *coro;
		1540	for (coro = coro_first; coro; coro = coro->next)
		1541	if (coro->hv)
		1542	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1543	}
		1544
		1545	void
		1546	call (Coro::State coro, SV *coderef)
		1547	ALIAS:
		1548	eval = 1
		1549	CODE:
		1550	{
		1551	if (coro->mainstack)
		1552	{
		1553	struct coro temp;
		1554	Zero (&temp, 1, struct coro);
		1555
		1556	if (!(coro->flags & CF_RUNNING))
		1557	{
		1558	save_perl (aTHX_ &temp);
		1559	load_perl (aTHX_ coro);
		1560	}
		1561
		1562	{
		1563	dSP;
		1564	ENTER;
		1565	SAVETMPS;
		1566	PUSHMARK (SP);
		1567	PUTBACK;
		1568	if (ix)
		1569	eval_sv (coderef, 0);
		1570	else
		1571	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1572	SPAGAIN;
		1573	FREETMPS;
		1574	LEAVE;
		1575	PUTBACK;
		1576	}
		1577
		1578	if (!(coro->flags & CF_RUNNING))
		1579	{
		1580	save_perl (aTHX_ coro);
		1581	load_perl (aTHX_ &temp);
		1582	}
		1583	}
		1584	}
		1585
		1586	SV *
		1587	is_ready (Coro::State coro)
		1588	PROTOTYPE: $
		1589	ALIAS:
		1590	is_ready = CF_READY
		1591	is_running = CF_RUNNING
		1592	is_new = CF_NEW
		1593	is_destroyed = CF_DESTROYED
		1594	CODE:
		1595	RETVAL = boolSV (coro->flags & ix);
		1596	OUTPUT:
		1597	RETVAL
		1598
		1599	void
		1600	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1601
		1602	SV *
		1603	has_stack (Coro::State coro)
		1604	PROTOTYPE: $
		1605	CODE:
		1606	RETVAL = boolSV (!!coro->cctx);
		1607	OUTPUT:
		1608	RETVAL
		1609
		1610	int
		1611	is_traced (Coro::State coro)
		1612	PROTOTYPE: $
		1613	CODE:
		1614	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1615	OUTPUT:
		1616	RETVAL
		1617
		1618	IV
		1619	rss (Coro::State coro)
		1620	PROTOTYPE: $
		1621	ALIAS:
		1622	usecount = 1
1055	CODE:	1623	CODE:
1056	static SV *returnstk;	1624	switch (ix)
1057	SV *sv;	1625	{
1058	AV *defav = GvAV (PL_defgv);	1626	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1059	struct coro *prev, *next;	1627	case 1: RETVAL = coro->usecount; break;
		1628	}
		1629	OUTPUT:
		1630	RETVAL
1060		1631
1061	if (!returnstk)
1062	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1063
1064	/* set up @_ -- ugly */
1065	av_clear (defav);
1066	av_fill (defav, items - 1);
1067	while (items--)
1068	av_store (defav, items, SvREFCNT_inc (ST(items)));
1069
1070	SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1071	sv = av_pop ((AV *)SvRV (returnstk));
1072	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1073	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1074	SvREFCNT_dec (sv);
1075
1076	transfer (aTHX_ prev, next, 0);
1077		1632
1078	MODULE = Coro::State PACKAGE = Coro	1633	MODULE = Coro::State PACKAGE = Coro
1079		1634
1080	# this is slightly dirty (should expose a c-level api)
1081
1082	BOOT:	1635	BOOT:
1083	{	1636	{
1084	int i;	1637	int i;
		1638
		1639	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1640	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1641	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1642
		1643	coro_current = get_sv ("Coro::current", FALSE);
		1644	SvREADONLY_on (coro_current);
		1645
1085	HV *stash = gv_stashpv ("Coro", TRUE);	1646	coro_stash = gv_stashpv ("Coro", TRUE);
1086		1647
1087	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1648	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1088	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1649	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1089	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1650	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1090	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1651	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1091	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1652	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1092	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1653	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1093
1094	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1095	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1096		1654
1097	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1655	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1098	coro_ready[i] = newAV ();	1656	coro_ready[i] = newAV ();
1099		1657
1100	{	1658	{
1101	SV *sv = perl_get_sv("Coro::API", 1);	1659	SV *sv = perl_get_sv("Coro::API", 1);
1102		1660
1103	coroapi.schedule = api_schedule;	1661	coroapi.schedule = api_schedule;
1104	coroapi.cede = api_cede;	1662	coroapi.cede = api_cede;
		1663	coroapi.cede_notself = api_cede_notself;
1105	coroapi.ready = api_ready;	1664	coroapi.ready = api_ready;
		1665	coroapi.is_ready = api_is_ready;
1106	coroapi.nready = &coro_nready;	1666	coroapi.nready = &coro_nready;
1107	coroapi.current = coro_current;	1667	coroapi.current = coro_current;
1108		1668
1109	GCoroAPI = &coroapi;	1669	GCoroAPI = &coroapi;
1110	sv_setiv(sv, (IV)&coroapi);	1670	sv_setiv (sv, (IV)&coroapi);
1111	SvREADONLY_on(sv);	1671	SvREADONLY_on (sv);
1112	}	1672	}
1113	}	1673	}
1114		1674
1115	#if !PERL_MICRO
1116
1117	void	1675	void
1118	ready(self)	1676	_set_current (SV *current)
1119	SV * self
1120	PROTOTYPE: $	1677	PROTOTYPE: $
1121	CODE:	1678	CODE:
1122	api_ready (self);	1679	SvREFCNT_dec (SvRV (coro_current));
1123		1680	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1124	#endif
1125		1681
1126	int	1682	int
		1683	prio (Coro::State coro, int newprio = 0)
		1684	ALIAS:
		1685	nice = 1
		1686	CODE:
		1687	{
		1688	RETVAL = coro->prio;
		1689
		1690	if (items > 1)
		1691	{
		1692	if (ix)
		1693	newprio = coro->prio - newprio;
		1694
		1695	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1696	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1697
		1698	coro->prio = newprio;
		1699	}
		1700	}
		1701	OUTPUT:
		1702	RETVAL
		1703
		1704	SV *
		1705	ready (SV *self)
		1706	PROTOTYPE: $
		1707	CODE:
		1708	RETVAL = boolSV (api_ready (self));
		1709	OUTPUT:
		1710	RETVAL
		1711
		1712	int
1127	nready(...)	1713	nready (...)
1128	PROTOTYPE:	1714	PROTOTYPE:
1129	CODE:	1715	CODE:
1130	RETVAL = coro_nready;	1716	RETVAL = coro_nready;
1131	OUTPUT:	1717	OUTPUT:
1132	RETVAL	1718	RETVAL
1133		1719
		1720	# for async_pool speedup
1134	void	1721	void
1135	schedule(...)	1722	_pool_1 (SV *cb)
1136	PROTOTYPE:
1137	CODE:	1723	CODE:
1138	api_schedule ();	1724	{
		1725	struct coro *coro = SvSTATE (coro_current);
		1726	HV *hv = (HV *)SvRV (coro_current);
		1727	AV *defav = GvAV (PL_defgv);
		1728	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1729	AV *invoke_av;
		1730	int i, len;
		1731
		1732	if (!invoke)
		1733	croak ("\3terminate\2\n");
		1734
		1735	SvREFCNT_dec (coro->saved_deffh);
		1736	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1737
		1738	hv_store (hv, "desc", sizeof ("desc") - 1,
		1739	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1740
		1741	invoke_av = (AV *)SvRV (invoke);
		1742	len = av_len (invoke_av);
		1743
		1744	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1745
		1746	if (len > 0)
		1747	{
		1748	av_fill (defav, len - 1);
		1749	for (i = 0; i < len; ++i)
		1750	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1751	}
		1752
		1753	SvREFCNT_dec (invoke);
		1754	}
1139		1755
1140	void	1756	void
1141	cede(...)	1757	_pool_2 (SV *cb)
1142	PROTOTYPE:
1143	CODE:	1758	CODE:
1144	api_cede ();	1759	{
		1760	struct coro *coro = SvSTATE (coro_current);
1145		1761
		1762	sv_setsv (cb, &PL_sv_undef);
		1763
		1764	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1765	coro->saved_deffh = 0;
		1766
		1767	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1768	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1769	croak ("\3terminate\2\n");
		1770
		1771	av_clear (GvAV (PL_defgv));
		1772	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1773	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1774
		1775	coro->prio = 0;
		1776
		1777	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1778	api_trace (coro_current, 0);
		1779
		1780	av_push (av_async_pool, newSVsv (coro_current));
		1781	}
		1782
		1783
		1784	MODULE = Coro::State PACKAGE = Coro::AIO
		1785
		1786	SV *
		1787	_get_state ()
		1788	CODE:
		1789	{
		1790	struct io_state *data;
		1791
		1792	RETVAL = newSV (sizeof (struct io_state));
		1793	data = (struct io_state *)SvPVX (RETVAL);
		1794	SvCUR_set (RETVAL, sizeof (struct io_state));
		1795	SvPOK_only (RETVAL);
		1796
		1797	data->errorno = errno;
		1798	data->laststype = PL_laststype;
		1799	data->laststatval = PL_laststatval;
		1800	data->statcache = PL_statcache;
		1801	}
		1802	OUTPUT:
		1803	RETVAL
		1804
		1805	void
		1806	_set_state (char *data_)
		1807	PROTOTYPE: $
		1808	CODE:
		1809	{
		1810	struct io_state *data = (void *)data_;
		1811
		1812	errno = data->errorno;
		1813	PL_laststype = data->laststype;
		1814	PL_laststatval = data->laststatval;
		1815	PL_statcache = data->statcache;
		1816	}
		1817

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