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Comparing Coro/Coro/State.xs (file contents):
Revision 1.53 by pcg, Sat Feb 14 12:39:41 2004 UTC vs.
Revision 1.186 by root, Fri Oct 5 20:10:42 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 "patchlevel.h"	9	#include "patchlevel.h"
6		10
7	#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)
8	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
10	# endif	57	# endif
11	# ifndef call_sv	58	# ifndef call_sv
12	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
23	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
25	# endif	72	# endif
26	#endif	73	#endif
27		74
28	#include "libcoro/coro.c"	75	/* 5.8.7 */
29		76	#ifndef SvRV_set
30	#include <signal.h>	77	# define SvRV_set(s,v) SvRV(s) = (v)
31
32	#ifdef HAVE_MMAP
33	# include <unistd.h>
34	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS
36	# ifdef MAP_ANON
37	# define MAP_ANONYMOUS MAP_ANON
38	# else
39	# undef HAVE_MMAP
40	# endif
41	# endif	78	#endif
42	#endif
43		79
44	#define SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
45	#define UCORO_STATE "_coro_state"	81	# undef CORO_STACKGUARD
		82	#endif
46		83
47	/* The next macro should declare a variable stacklevel that contains and approximation	84	#ifndef CORO_STACKGUARD
48	* to the current C stack pointer. Its property is that it changes with each call	85	# define CORO_STACKGUARD 0
49	* and should be unique. */	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
50	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
51		97
52	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
53		99
54	#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))
55		109
56	#include "CoroAPI.h"	110	#include "CoroAPI.h"
57		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;
58	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 */
59		136
60	/* 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 */
61	typedef struct {	157	typedef struct coro_cctx {
62	int refcnt; /* pointer reference counter */	158	struct coro_cctx *next;
63	int usecnt; /* shared by how many coroutines */
64	int gencnt; /* generation counter */
65		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;
66	coro_context cctx;	168	coro_context cctx;
67		169
68	void *sptr;	170	#if CORO_USE_VALGRIND
69	long ssize; /* positive == mmap, otherwise malloc */	171	int valgrind_id;
70	} coro_stack;	172	#endif
		173	unsigned char flags;
		174	} coro_cctx;
71		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 */
72	struct coro {	184	struct coro {
73	/* the top-level JMPENV for each coroutine, needed to catch dies. */	185	/* the c coroutine allocated to this perl coroutine, if any */
74	JMPENV start_env;	186	coro_cctx *cctx;
75
76	/* the optional C context */
77	coro_stack *stack;
78	void *cursp;
79	int gencnt;
80
81	/* optionally saved, might be zero */
82	AV *defav;
83	SV *defsv;
84	SV *errsv;
85
86	/* saved global state not related to stacks */
87	U8 dowarn;
88	I32 in_eval;
89
90	/* the stacks and related info (callchain etc..) */
91	PERL_SI *curstackinfo;
92	AV *curstack;
93	AV *mainstack;
94	SV **stack_sp;
95	OP *op;
96	SV **curpad;
97	AV *comppad;
98	SV **stack_base;
99	SV **stack_max;
100	SV **tmps_stack;
101	I32 tmps_floor;
102	I32 tmps_ix;
103	I32 tmps_max;
104	I32 *markstack;
105	I32 *markstack_ptr;
106	I32 *markstack_max;
107	I32 *scopestack;
108	I32 scopestack_ix;
109	I32 scopestack_max;
110	ANY *savestack;
111	I32 savestack_ix;
112	I32 savestack_max;
113	OP **retstack;
114	I32 retstack_ix;
115	I32 retstack_max;
116	COP *curcop;
117	JMPENV *top_env;
118		187
119	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
120	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	SV *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 transfers to this coro */
		207
		208	/* coro process data */
		209	int prio;
		210	//SV *throw;
		211
		212	/* async_pool */
		213	SV *saved_deffh;
		214
		215	/* linked list */
		216	struct coro *next, *prev;
		217	HV *hv; /* the perl hash associated with this coro, if any */
121	};	218	};
122		219
123	typedef struct coro *Coro__State;	220	typedef struct coro *Coro__State;
124	typedef struct coro *Coro__State_or_hashref;	221	typedef struct coro *Coro__State_or_hashref;
125		222
126	static AV *main_mainstack; /* used to differentiate between $main and others */	223	/** Coro ********************************************************************/
127	static HV *coro_state_stash;
128	static SV *ucoro_state_sv;
129	static U32 ucoro_state_hash;
130	static HV *padlist_cache;
131	static SV *coro_mortal; /* will be freed after next transfer */
132		224
133	/* mostly copied from op.c:cv_clone2 */	225	#define PRIO_MAX 3
134	STATIC AV *	226	#define PRIO_HIGH 1
135	clone_padlist (AV *protopadlist)	227	#define PRIO_NORMAL 0
		228	#define PRIO_LOW -1
		229	#define PRIO_IDLE -3
		230	#define PRIO_MIN -4
		231
		232	/* for Coro.pm */
		233	static SV *coro_current;
		234	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		235	static int coro_nready;
		236	static struct coro *coro_first;
		237
		238	/** lowlevel stuff **********************************************************/
		239
		240	static AV *
		241	coro_clone_padlist (pTHX_ CV *cv)
136	{	242	{
137	AV *av;	243	AV *padlist = CvPADLIST (cv);
138	I32 ix;
139	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
140	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
141	SV **pname = AvARRAY (protopad_name);
142	SV **ppad = AvARRAY (protopad);
143	I32 fname = AvFILLp (protopad_name);
144	I32 fpad = AvFILLp (protopad);
145	AV *newpadlist, *newpad_name, *newpad;	244	AV *newpadlist, *newpad;
146	SV **npad;
147
148	newpad_name = newAV ();
149	for (ix = fname; ix >= 0; ix--)
150	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
151
152	newpad = newAV ();
153	av_fill (newpad, AvFILLp (protopad));
154	npad = AvARRAY (newpad);
155		245
156	newpadlist = newAV ();	246	newpadlist = newAV ();
157	AvREAL_off (newpadlist);	247	AvREAL_off (newpadlist);
158	av_store (newpadlist, 0, (SV *) newpad_name);	248	#if PERL_VERSION_ATLEAST (5,9,0)
		249	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		250	#else
		251	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		252	#endif
		253	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		254	--AvFILLp (padlist);
		255
		256	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
159	av_store (newpadlist, 1, (SV *) newpad);	257	av_store (newpadlist, 1, (SV *)newpad);
160
161	av = newAV (); /* will be @_ */
162	av_extend (av, 0);
163	av_store (newpad, 0, (SV *) av);
164	AvFLAGS (av) = AVf_REIFY;
165
166	for (ix = fpad; ix > 0; ix--)
167	{
168	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
169	if (namesv && namesv != &PL_sv_undef)
170	{
171	char *name = SvPVX (namesv); /* XXX */
172	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
173	{ /* lexical from outside? */
174	npad[ix] = SvREFCNT_inc (ppad[ix]);
175	}
176	else
177	{ /* our own lexical */
178	SV *sv;
179	if (*name == '&')
180	sv = SvREFCNT_inc (ppad[ix]);
181	else if (*name == '@')
182	sv = (SV *) newAV ();
183	else if (*name == '%')
184	sv = (SV *) newHV ();
185	else
186	sv = NEWSV (0, 0);
187	#ifdef SvPADBUSY
188	if (!SvPADBUSY (sv))
189	#endif
190	SvPADMY_on (sv);
191	npad[ix] = sv;
192	}
193	}
194	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
195	{
196	npad[ix] = SvREFCNT_inc (ppad[ix]);
197	}
198	else
199	{
200	SV *sv = NEWSV (0, 0);
201	SvPADTMP_on (sv);
202	npad[ix] = sv;
203	}
204	}
205
206	#if 0 /* return -ENOTUNDERSTOOD */
207	/* Now that vars are all in place, clone nested closures. */
208
209	for (ix = fpad; ix > 0; ix--) {
210	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
211	if (namesv
212	&& namesv != &PL_sv_undef
213	&& !(SvFLAGS(namesv) & SVf_FAKE)
214	&& *SvPVX(namesv) == '&'
215	&& CvCLONE(ppad[ix]))
216	{
217	CV *kid = cv_clone((CV*)ppad[ix]);
218	SvREFCNT_dec(ppad[ix]);
219	CvCLONE_on(kid);
220	SvPADMY_on(kid);
221	npad[ix] = (SV*)kid;
222	}
223	}
224	#endif
225		258
226	return newpadlist;	259	return newpadlist;
227	}	260	}
228		261
229	STATIC void	262	static void
230	free_padlist (AV *padlist)	263	free_padlist (pTHX_ AV *padlist)
231	{	264	{
232	/* may be during global destruction */	265	/* may be during global destruction */
233	if (SvREFCNT (padlist))	266	if (SvREFCNT (padlist))
234	{	267	{
235	I32 i = AvFILLp (padlist);	268	I32 i = AvFILLp (padlist);
…		…
248		281
249	SvREFCNT_dec ((SV*)padlist);	282	SvREFCNT_dec ((SV*)padlist);
250	}	283	}
251	}	284	}
252		285
253	STATIC int	286	static int
254	coro_cv_free (SV *sv, MAGIC *mg)	287	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
255	{	288	{
256	AV *padlist;	289	AV *padlist;
257	AV *av = (AV *)mg->mg_obj;	290	AV *av = (AV *)mg->mg_obj;
258		291
259	/* casting is fun. */	292	/* casting is fun. */
260	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	293	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
261	free_padlist (padlist);	294	free_padlist (aTHX_ padlist);
		295
		296	SvREFCNT_dec (av);
		297
		298	return 0;
262	}	299	}
263		300
264	#define PERL_MAGIC_coro PERL_MAGIC_ext	301	#define PERL_MAGIC_coro PERL_MAGIC_ext
265		302
266	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	303	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
267		304
		305	#define CORO_MAGIC(cv) \
		306	SvMAGIC (cv) \
		307	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		308	? SvMAGIC (cv) \
		309	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		310	: 0
		311
		312	static struct coro *
		313	SvSTATE_ (pTHX_ SV *coro)
		314	{
		315	HV *stash;
		316	MAGIC *mg;
		317
		318	if (SvROK (coro))
		319	coro = SvRV (coro);
		320
		321	if (SvTYPE (coro) != SVt_PVHV)
		322	croak ("Coro::State object required");
		323
		324	stash = SvSTASH (coro);
		325	if (stash != coro_stash && stash != coro_state_stash)
		326	{
		327	/* very slow, but rare, check */
		328	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		329	croak ("Coro::State object required");
		330	}
		331
		332	mg = CORO_MAGIC (coro);
		333	return (struct coro *)mg->mg_ptr;
		334	}
		335
		336	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		337
268	/* the next two functions merely cache the padlists */	338	/* the next two functions merely cache the padlists */
269	STATIC void	339	static void
270	get_padlist (CV *cv)	340	get_padlist (pTHX_ CV *cv)
271	{	341	{
272	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	342	MAGIC *mg = CORO_MAGIC (cv);
		343	AV *av;
273		344
274	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	345	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
275	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	346	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
276	else	347	else
		348	{
		349	#if CORO_PREFER_PERL_FUNCTIONS
		350	/* this is probably cleaner, but also slower? */
		351	CV *cp = Perl_cv_clone (cv);
		352	CvPADLIST (cv) = CvPADLIST (cp);
		353	CvPADLIST (cp) = 0;
		354	SvREFCNT_dec (cp);
		355	#else
277	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	356	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		357	#endif
		358	}
278	}	359	}
279		360
280	STATIC void	361	static void
281	put_padlist (CV *cv)	362	put_padlist (pTHX_ CV *cv)
282	{	363	{
283	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	364	MAGIC *mg = CORO_MAGIC (cv);
		365	AV *av;
284		366
285	if (!mg)	367	if (!mg)
286	{	368	{
287	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	369	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
288	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	370	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
289	mg->mg_virtual = &vtbl_coro;	371	mg->mg_virtual = &vtbl_coro;
290	mg->mg_obj = (SV *)newAV ();	372	mg->mg_obj = (SV *)newAV ();
291	}	373	}
292		374
293	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	375	av = (AV *)mg->mg_obj;
294	}
295		376
296	#define SB do {	377	if (AvFILLp (av) >= AvMAX (av))
297	#define SE } while (0)	378	av_extend (av, AvMAX (av) + 1);
298		379
299	#define LOAD(state) load_state(aTHX_ (state));	380	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
300	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	381	}
301		382
302	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	383	/** load & save, init *******************************************************/
303		384
304	static void	385	static void
305	load_state(pTHX_ Coro__State c)	386	load_perl (pTHX_ Coro__State c)
306	{	387	{
307	PL_dowarn = c->dowarn;	388	#define VAR(name,type) PL_ ## name = c->name;
308	PL_in_eval = c->in_eval;	389	# include "state.h"
		390	#undef VAR
309		391
310	PL_curstackinfo = c->curstackinfo;	392	GvSV (PL_defgv) = c->defsv;
311	PL_curstack = c->curstack;	393	GvAV (PL_defgv) = c->defav;
312	PL_mainstack = c->mainstack;	394	GvSV (PL_errgv) = c->errsv;
313	PL_stack_sp = c->stack_sp;	395	GvSV (irsgv) = c->irssv_sv;
314	PL_op = c->op;
315	PL_curpad = c->curpad;
316	PL_comppad = c->comppad;
317	PL_stack_base = c->stack_base;
318	PL_stack_max = c->stack_max;
319	PL_tmps_stack = c->tmps_stack;
320	PL_tmps_floor = c->tmps_floor;
321	PL_tmps_ix = c->tmps_ix;
322	PL_tmps_max = c->tmps_max;
323	PL_markstack = c->markstack;
324	PL_markstack_ptr = c->markstack_ptr;
325	PL_markstack_max = c->markstack_max;
326	PL_scopestack = c->scopestack;
327	PL_scopestack_ix = c->scopestack_ix;
328	PL_scopestack_max = c->scopestack_max;
329	PL_savestack = c->savestack;
330	PL_savestack_ix = c->savestack_ix;
331	PL_savestack_max = c->savestack_max;
332	PL_retstack = c->retstack;
333	PL_retstack_ix = c->retstack_ix;
334	PL_retstack_max = c->retstack_max;
335	PL_curcop = c->curcop;
336	PL_top_env = c->top_env;
337
338	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
339	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
340	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
341		396
342	{	397	{
343	dSP;	398	dSP;
344	CV *cv;	399	CV *cv;
345		400
346	/* now do the ugly restore mess */	401	/* now do the ugly restore mess */
347	while ((cv = (CV *)POPs))	402	while ((cv = (CV *)POPs))
348	{	403	{
349	AV *padlist = (AV *)POPs;
350
351	if (padlist)
352	{
353	put_padlist (cv); /* mark this padlist as available */	404	put_padlist (aTHX_ cv); /* mark this padlist as available */
354	CvPADLIST(cv) = padlist;	405	CvDEPTH (cv) = PTR2IV (POPs);
355	#ifdef USE_THREADS	406	CvPADLIST (cv) = (AV *)POPs;
356	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
357	#endif
358	}
359
360	++CvDEPTH(cv);
361	}	407	}
362		408
363	PUTBACK;	409	PUTBACK;
364	}	410	}
365	}	411	}
366		412
367	static void	413	static void
368	save_state(pTHX_ Coro__State c, int flags)	414	save_perl (pTHX_ Coro__State c)
369	{	415	{
370	{	416	{
371	dSP;	417	dSP;
372	I32 cxix = cxstack_ix;	418	I32 cxix = cxstack_ix;
373	PERL_CONTEXT *ccstk = cxstack;	419	PERL_CONTEXT *ccstk = cxstack;
…		…
376	/*	422	/*
377	* the worst thing you can imagine happens first - we have to save	423	* the worst thing you can imagine happens first - we have to save
378	* (and reinitialize) all cv's in the whole callchain :(	424	* (and reinitialize) all cv's in the whole callchain :(
379	*/	425	*/
380		426
381	PUSHs (Nullsv);	427	XPUSHs (Nullsv);
382	/* this loop was inspired by pp_caller */	428	/* this loop was inspired by pp_caller */
383	for (;;)	429	for (;;)
384	{	430	{
385	while (cxix >= 0)	431	while (cxix >= 0)
386	{	432	{
387	PERL_CONTEXT *cx = &ccstk[cxix--];	433	PERL_CONTEXT *cx = &ccstk[cxix--];
388		434
389	if (CxTYPE(cx) == CXt_SUB)	435	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
390	{	436	{
391	CV *cv = cx->blk_sub.cv;	437	CV *cv = cx->blk_sub.cv;
		438
392	if (CvDEPTH(cv))	439	if (CvDEPTH (cv))
393	{	440	{
394	#ifdef USE_THREADS
395	/*XPUSHs ((SV *)CvOWNER(cv));*/
396	/*CvOWNER(cv) = 0;*/
397	/*error must unlock this cv etc.. etc...*/
398	#endif
399	EXTEND (SP, CvDEPTH(cv)*2);	441	EXTEND (SP, 3);
400
401	while (--CvDEPTH(cv))
402	{
403	/* this tells the restore code to increment CvDEPTH */
404	PUSHs (Nullsv);
405	PUSHs ((SV *)cv);
406	}
407
408	PUSHs ((SV *)CvPADLIST(cv));	442	PUSHs ((SV *)CvPADLIST (cv));
		443	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
409	PUSHs ((SV *)cv);	444	PUSHs ((SV *)cv);
410		445
411	get_padlist (cv); /* this is a monster */	446	CvDEPTH (cv) = 0;
		447	get_padlist (aTHX_ cv);
412	}	448	}
413	}	449	}
414	#ifdef CXt_FORMAT
415	else if (CxTYPE(cx) == CXt_FORMAT)
416	{
417	/* I never used formats, so how should I know how these are implemented? */
418	/* my bold guess is as a simple, plain sub... */
419	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
420	}
421	#endif
422	}	450	}
423		451
424	if (top_si->si_type == PERLSI_MAIN)	452	if (top_si->si_type == PERLSI_MAIN)
425	break;	453	break;
426		454
427	top_si = top_si->si_prev;	455	top_si = top_si->si_prev;
428	ccstk = top_si->si_cxstack;	456	ccstk = top_si->si_cxstack;
429	cxix = top_si->si_cxix;	457	cxix = top_si->si_cxix;
430	}	458	}
431		459
432	PUTBACK;	460	PUTBACK;
433	}	461	}
434		462
435	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	463	c->defav = GvAV (PL_defgv);
436	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	464	c->defsv = DEFSV;
437	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	465	c->errsv = ERRSV;
		466	c->irssv_sv = GvSV (irsgv);
438		467
439	c->dowarn = PL_dowarn;	468	#define VAR(name,type)c->name = PL_ ## name;
440	c->in_eval = PL_in_eval;	469	# include "state.h"
441		470	#undef VAR
442	c->curstackinfo = PL_curstackinfo;
443	c->curstack = PL_curstack;
444	c->mainstack = PL_mainstack;
445	c->stack_sp = PL_stack_sp;
446	c->op = PL_op;
447	c->curpad = PL_curpad;
448	c->comppad = PL_comppad;
449	c->stack_base = PL_stack_base;
450	c->stack_max = PL_stack_max;
451	c->tmps_stack = PL_tmps_stack;
452	c->tmps_floor = PL_tmps_floor;
453	c->tmps_ix = PL_tmps_ix;
454	c->tmps_max = PL_tmps_max;
455	c->markstack = PL_markstack;
456	c->markstack_ptr = PL_markstack_ptr;
457	c->markstack_max = PL_markstack_max;
458	c->scopestack = PL_scopestack;
459	c->scopestack_ix = PL_scopestack_ix;
460	c->scopestack_max = PL_scopestack_max;
461	c->savestack = PL_savestack;
462	c->savestack_ix = PL_savestack_ix;
463	c->savestack_max = PL_savestack_max;
464	c->retstack = PL_retstack;
465	c->retstack_ix = PL_retstack_ix;
466	c->retstack_max = PL_retstack_max;
467	c->curcop = PL_curcop;
468	c->top_env = PL_top_env;
469	}	471	}
470		472
471	/*	473	/*
472	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
473	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
474	* on the (sometimes correct) assumption that coroutines do	476	* on the (sometimes correct) assumption that coroutines do
475	* not usually need a lot of stackspace.	477	* not usually need a lot of stackspace.
476	*/	478	*/
477	STATIC void	479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
		482	static void
478	coro_init_stacks (pTHX)	483	coro_init_stacks (pTHX)
479	{	484	{
480	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	485	PL_curstackinfo = new_stackinfo(64, 6);
481	PL_curstackinfo->si_type = PERLSI_MAIN;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
482	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
483	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
484		489
485	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
486	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
487	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
488		493
489	New(50,PL_tmps_stack,96,SV*);	494	New(50,PL_tmps_stack,64,SV*);
490	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
491	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
492	PL_tmps_max = 96;	497	PL_tmps_max = 64;
493		498
494	New(54,PL_markstack,16,I32);	499	New(54,PL_markstack,16,I32);
495	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
496	PL_markstack_max = PL_markstack + 16;	501	PL_markstack_max = PL_markstack + 16;
497		502
…		…
501		506
502	New(54,PL_scopestack,16,I32);	507	New(54,PL_scopestack,16,I32);
503	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
504	PL_scopestack_max = 16;	509	PL_scopestack_max = 16;
505		510
506	New(54,PL_savestack,96,ANY);	511	New(54,PL_savestack,64,ANY);
507	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
508	PL_savestack_max = 96;	513	PL_savestack_max = 64;
509		514
		515	#if !PERL_VERSION_ATLEAST (5,9,0)
510	New(54,PL_retstack,8,OP*);	516	New(54,PL_retstack,4,OP*);
511	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
512	PL_retstack_max = 8;	518	PL_retstack_max = 4;
		519	#endif
513	}	520	}
		521	#endif
514		522
515	/*	523	/*
516	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
517	*/	525	*/
518	STATIC void	526	static void
519	destroy_stacks(pTHX)	527	coro_destroy_stacks (pTHX)
520	{	528	{
521	if (!IN_DESTRUCT)
522	{
523	/* is this ugly, I ask? */
524	LEAVE_SCOPE (0);
525
526	/* sure it is, but more important: is it correct?? :/ */
527	FREETMPS;
528	}
529
530	while (PL_curstackinfo->si_next)	529	while (PL_curstackinfo->si_next)
531	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
532		531
533	while (PL_curstackinfo)	532	while (PL_curstackinfo)
534	{	533	{
535	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
536		535
537	{
538	dSP;
539	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
540	PUTBACK; /* possibly superfluous */
541	}
542
543	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
544	{
545	dounwind(-1);
546	SvREFCNT_dec(PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
547	}
548		538
549	Safefree(PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
550	Safefree(PL_curstackinfo);	540	Safefree (PL_curstackinfo);
551	PL_curstackinfo = p;	541	PL_curstackinfo = p;
552	}	542	}
553		543
554	Safefree(PL_tmps_stack);	544	Safefree (PL_tmps_stack);
555	Safefree(PL_markstack);	545	Safefree (PL_markstack);
556	Safefree(PL_scopestack);	546	Safefree (PL_scopestack);
557	Safefree(PL_savestack);	547	Safefree (PL_savestack);
		548	#if !PERL_VERSION_ATLEAST (5,9,0)
558	Safefree(PL_retstack);	549	Safefree (PL_retstack);
559	}
560
561	static void
562	allocate_stack (Coro__State ctx, int alloc)
563	{
564	coro_stack *stack;
565
566	New (0, stack, 1, coro_stack);
567
568	stack->refcnt = 1;
569	stack->usecnt = 1;
570	stack->gencnt = ctx->gencnt = 0;
571	if (alloc)
572	{
573	#if HAVE_MMAP
574	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
575	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
576	if (stack->sptr == (void *)-1)
577	#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)
578	{	561	{
579	/*FIXME*//*D*//* reasonable stack size! */	562	#define VAR(name,type)coro->name = PL_ ## name;
580	stack->ssize = - (8192 * sizeof (long));	563	# include "state.h"
581	New (0, stack->sptr, 8192, long);	564	#undef VAR
582	}	565	}
583	}
584	else
585	stack->sptr = 0;
586		566
587	ctx->stack = stack;	567	rss += sizeof (coro->curstackinfo);
588	}	568	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		569	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		570	rss += sizeof (SV) + 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);
589		575
590	static void	576	#if !PERL_VERSION_ATLEAST (5,9,0)
591	deallocate_stack (Coro__State ctx)	577	rss += coro->retstack_max * sizeof (OP *);
592	{	578	#endif
593	coro_stack *stack = ctx->stack;
594
595	ctx->stack = 0;
596
597	if (stack)
598	{	579	}
599	if (!--stack->refcnt)
600	{
601	#ifdef HAVE_MMAP
602	if (stack->ssize > 0 && stack->sptr)
603	munmap (stack->sptr, stack->ssize);
604	else
605	#endif
606	Safefree (stack->sptr);
607		580
608	Safefree (stack);	581	return rss;
609	}
610	else if (ctx->gencnt == stack->gencnt)
611	--stack->usecnt;
612	}
613	}	582	}
614		583
		584	/** coroutine stack handling ************************************************/
		585
615	static void	586	static void
616	setup_coro (void *arg)	587	coro_setup (pTHX_ struct coro *coro)
617	{	588	{
618	/*	589	/*
619	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
620	*/	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 = (GV *)NEWSV (0, 0);
		612	gv_init (PL_defoutgv, coro_state_stash, "stdout", sizeof ("stdout") - 1, 0);
		613	IoTYPE (io) = IoTYPE_WRONLY;
		614	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		615	IoFLAGS (io) |= IOf_FLUSH;
		616	GvIOp (PL_defoutgv) = io;
		617	}
		618
		619	{
		620	dSP;
		621	LOGOP myop;
		622
		623	Zero (&myop, 1, LOGOP);
		624	myop.op_next = Nullop;
		625	myop.op_flags = OPf_WANT_VOID;
		626
		627	PUSHMARK (SP);
		628	XPUSHs (av_shift (GvAV (PL_defgv)));
		629	PUTBACK;
		630	PL_op = (OP *)&myop;
		631	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		632	SPAGAIN;
		633	}
		634
		635	ENTER; /* necessary e.g. for dounwind */
		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	while (bot < top)
		714	av_push (av, SvREFCNT_inc (*bot++));
		715
		716	PL_runops = RUNOPS_DEFAULT;
		717	ENTER;
		718	SAVETMPS;
		719	EXTEND (SP, 3);
		720	PUSHMARK (SP);
		721	PUSHs (&PL_sv_no);
		722	PUSHs (fullname);
		723	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		724	PUTBACK;
		725	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		726	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		727	SPAGAIN;
		728	FREETMPS;
		729	LEAVE;
		730	PL_runops = runops_trace;
		731	}
		732
		733	if (oldcop != PL_curcop)
		734	{
		735	oldcop = PL_curcop;
		736
		737	if (PL_curcop != &PL_compiling)
		738	{
		739	SV **cb;
		740
		741	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		742	{
		743	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		744
		745	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		746	{
		747	runops_proc_t old_runops = PL_runops;
		748	dSP;
		749	GV *gv = CvGV (cx->blk_sub.cv);
		750	SV *fullname = sv_2mortal (newSV (0));
		751
		752	if (isGV (gv))
		753	gv_efullname3 (fullname, gv, 0);
		754
		755	PL_runops = RUNOPS_DEFAULT;
		756	ENTER;
		757	SAVETMPS;
		758	EXTEND (SP, 3);
		759	PUSHMARK (SP);
		760	PUSHs (&PL_sv_yes);
		761	PUSHs (fullname);
		762	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		763	PUTBACK;
		764	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		765	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		766	SPAGAIN;
		767	FREETMPS;
		768	LEAVE;
		769	PL_runops = runops_trace;
		770	}
		771
		772	oldcxix = cxstack_ix;
		773	}
		774
		775	if (cctx->flags & CC_TRACE_LINE)
		776	{
		777	dSP;
		778
		779	PL_runops = RUNOPS_DEFAULT;
		780	ENTER;
		781	SAVETMPS;
		782	EXTEND (SP, 3);
		783	PL_runops = RUNOPS_DEFAULT;
		784	PUSHMARK (SP);
		785	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		786	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		787	PUTBACK;
		788	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		789	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		790	SPAGAIN;
		791	FREETMPS;
		792	LEAVE;
		793	PL_runops = runops_trace;
		794	}
		795	}
		796	}
		797	}
		798	}
		799
		800	TAINT_NOT;
		801	return 0;
		802	}
		803
		804	/* inject a fake call to Coro::State::_cctx_init into the execution */
		805	/* _cctx_init should be careful, as it could be called at almost any time */
		806	/* during execution of a perl program */
		807	static void NOINLINE
		808	prepare_cctx (pTHX_ coro_cctx *cctx)
		809	{
621	dSP;	810	dSP;
622	Coro__State ctx = (Coro__State)arg;	811	LOGOP myop;
623	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
624		812
625	coro_init_stacks (aTHX);	813	PL_top_env = &PL_start_env;
626	/*PL_curcop = 0;*/
627	/*PL_in_eval = PL_in_eval;*/ /* inherit */
628	SvREFCNT_dec (GvAV (PL_defgv));
629	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
630		814
		815	if (cctx->flags & CC_TRACE)
		816	PL_runops = runops_trace;
		817
		818	Zero (&myop, 1, LOGOP);
		819	myop.op_next = PL_op;
		820	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		821
		822	PUSHMARK (SP);
		823	EXTEND (SP, 2);
		824	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		825	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		826	PUTBACK;
		827	PL_op = (OP *)&myop;
		828	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
631	SPAGAIN;	829	SPAGAIN;
		830	}
632		831
633	if (ctx->stack)	832	/*
634	{	833	* this is a _very_ stripped down perl interpreter ;)
635	ctx->cursp = 0;	834	*/
		835	static void
		836	coro_run (void *arg)
		837	{
		838	dTHX;
636		839
637	PUSHMARK(SP);	840	/* coro_run is the alternative tail of transfer(), so unlock here. */
638	PUTBACK;	841	UNLOCK;
639	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
640		842
641	if (SvTRUE (ERRSV))	843	/* we now skip the entersub that lead to transfer() */
642	croak (NULL);	844	PL_op = PL_op->op_next;
643	else	845
644	croak ("FATAL: CCTXT coroutine returned!");	846	/* inject a fake subroutine call to cctx_init */
		847	prepare_cctx (aTHX_ (coro_cctx *)arg);
		848
		849	/* somebody or something will hit me for both perl_run and PL_restartop */
		850	PL_restartop = PL_op;
		851	perl_run (PL_curinterp);
		852
		853	/*
		854	* If perl-run returns we assume exit() was being called or the coro
		855	* fell off the end, which seems to be the only valid (non-bug)
		856	* reason for perl_run to return. We try to exit by jumping to the
		857	* bootstrap-time "top" top_env, as we cannot restore the "main"
		858	* coroutine as Coro has no such concept
		859	*/
		860	PL_top_env = main_top_env;
		861	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		862	}
		863
		864	static coro_cctx *
		865	cctx_new ()
		866	{
		867	coro_cctx *cctx;
		868	void *stack_start;
		869	size_t stack_size;
		870
		871	++cctx_count;
		872
		873	Newz (0, cctx, 1, coro_cctx);
		874
		875	#if HAVE_MMAP
		876
		877	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		878	/* mmap supposedly does allocate-on-write for us */
		879	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		880
		881	if (cctx->sptr != (void *)-1)
		882	{
		883	# if CORO_STACKGUARD
		884	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		885	# endif
		886	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		887	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		888	cctx->flags |= CC_MAPPED;
645	}	889	}
646	else	890	else
647	{	891	#endif
648	UNOP myop;
649
650	PL_op = (OP *)&myop;
651
652	Zero(&myop, 1, UNOP);
653	myop.op_next = Nullop;
654	myop.op_flags = OPf_WANT_VOID;
655
656	PUSHMARK(SP);
657	XPUSHs (sub_init);
658	/*
659	* the next line is slightly wrong, as PL_op->op_next
660	* is actually being executed so we skip the first op.
661	* that doesn't matter, though, since it is only
662	* pp_nextstate and we never return...
663	* ah yes, and I don't care anyways ;)
664	*/
665	PUTBACK;
666	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
667	SPAGAIN;
668
669	ENTER; /* necessary e.g. for dounwind */
670	}	892	{
671	}	893	cctx->ssize = coro_stacksize * (long)sizeof (long);
		894	New (0, cctx->sptr, coro_stacksize, long);
672		895
673	static void	896	if (!cctx->sptr)
674	continue_coro (void *arg)	897	{
675	{	898	perror ("FATAL: unable to allocate stack for coroutine");
676	/*	899	_exit (EXIT_FAILURE);
677	* this is a _very_ stripped down perl interpreter ;)	900	}
678	*/
679	Coro__State ctx = (Coro__State)arg;
680	JMPENV coro_start_env;
681		901
682	PL_top_env = &ctx->start_env;	902	stack_start = cctx->sptr;
		903	stack_size = cctx->ssize;
		904	}
683		905
684	ctx->cursp = 0;	906	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
685	PL_op = PL_op->op_next;	907	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
686	CALLRUNOPS(aTHX);
687		908
688	abort ();	909	return cctx;
689	}	910	}
690		911
691	STATIC void	912	static void
		913	cctx_destroy (coro_cctx *cctx)
		914	{
		915	if (!cctx)
		916	return;
		917
		918	--cctx_count;
		919
		920	#if CORO_USE_VALGRIND
		921	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		922	#endif
		923
		924	#if HAVE_MMAP
		925	if (cctx->flags & CC_MAPPED)
		926	munmap (cctx->sptr, cctx->ssize);
		927	else
		928	#endif
		929	Safefree (cctx->sptr);
		930
		931	Safefree (cctx);
		932	}
		933
		934	static coro_cctx *
		935	cctx_get (pTHX)
		936	{
		937	while (cctx_first)
		938	{
		939	coro_cctx *cctx = cctx_first;
		940	cctx_first = cctx->next;
		941	--cctx_idle;
		942
		943	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		944	return cctx;
		945
		946	cctx_destroy (cctx);
		947	}
		948
		949	return cctx_new ();
		950	}
		951
		952	static void
		953	cctx_put (coro_cctx *cctx)
		954	{
		955	/* free another cctx if overlimit */
		956	if (cctx_idle >= MAX_IDLE_CCTX)
		957	{
		958	coro_cctx *first = cctx_first;
		959	cctx_first = first->next;
		960	--cctx_idle;
		961
		962	cctx_destroy (first);
		963	}
		964
		965	++cctx_idle;
		966	cctx->next = cctx_first;
		967	cctx_first = cctx;
		968	}
		969
		970	/** coroutine switching *****************************************************/
		971
		972	static void NOINLINE
		973	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		974	{
		975	if (prev != next)
		976	{
		977	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		978	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		979
		980	if (next->flags & CF_RUNNING)
		981	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		982
		983	if (next->flags & CF_DESTROYED)
		984	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		985
		986	if (PL_lex_state != LEX_NOTPARSING)
		987	croak ("Coro::State::transfer called while parsing, but this is not supported");
		988	}
		989	}
		990
		991	/* always use the TRANSFER macro */
		992	static void NOINLINE
692	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	993	transfer (pTHX_ struct coro *prev, struct coro *next)
693	{	994	{
694	dSTACKLEVEL;	995	dSTACKLEVEL;
695	static struct coro *xnext;
696		996
		997	/* sometimes transfer is only called to set idle_sp */
		998	if (!next)
		999	{
		1000	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1001	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1002	}
697	if (prev != next)	1003	else if (prev != next)
698	{	1004	{
699	xnext = next;	1005	coro_cctx *prev__cctx;
700		1006
701	if (next->mainstack)	1007	if (prev->flags & CF_NEW)
702	{	1008	{
703	SAVE (prev, flags);	1009	/* create a new empty context */
704	LOAD (next);	1010	Newz (0, prev->cctx, 1, coro_cctx);
705		1011	prev->flags &= ~CF_NEW;
706	/* mark this state as in-use */	1012	prev->flags |= CF_RUNNING;
707	next->mainstack = 0;
708	next->tmps_ix = -2;
709
710	/* stacklevel changed? if yes, grab the stack for us! */
711	if (flags & TRANSFER_SAVE_CCTXT)
712	{
713	if (!prev->stack)
714	allocate_stack (prev, 0);
715	else if (prev->cursp != stacklevel
716	&& prev->stack->usecnt > 1)
717	{
718	prev->gencnt = ++prev->stack->gencnt;
719	prev->stack->usecnt = 1;
720	}
721
722	/* has our stack been invalidated? */
723	if (next->stack && next->stack->gencnt != next->gencnt)
724	{
725	deallocate_stack (next);
726	allocate_stack (next, 1);
727	coro_create (&(next->stack->cctx),
728	continue_coro, (void *)next,
729	next->stack->sptr, labs (next->stack->ssize));
730	}
731
732	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733	/* don't add any code here */
734	}
735
736	}	1013	}
737	else if (next->tmps_ix == -2)	1014
738	croak ("tried to transfer to running coroutine");	1015	prev->flags &= ~CF_RUNNING;
		1016	next->flags |= CF_RUNNING;
		1017
		1018	LOCK;
		1019
		1020	if (next->flags & CF_NEW)
		1021	{
		1022	/* need to start coroutine */
		1023	next->flags &= ~CF_NEW;
		1024	/* first get rid of the old state */
		1025	save_perl (aTHX_ prev);
		1026	/* setup coroutine call */
		1027	coro_setup (aTHX_ next);
		1028	}
739	else	1029	else
740	{	1030	{
741	SAVE (prev, -1); /* first get rid of the old state */	1031	/* coroutine already started */
742		1032	save_perl (aTHX_ prev);
743	if (flags & TRANSFER_SAVE_CCTXT)	1033	load_perl (aTHX_ next);
744	{
745	if (!prev->stack)
746	allocate_stack (prev, 0);
747
748	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
749	{
750	PL_top_env = &next->start_env;
751
752	setup_coro (next);
753
754	prev->stack->refcnt++;
755	prev->stack->usecnt++;
756	next->stack = prev->stack;
757	next->gencnt = prev->gencnt;
758	}
759	else
760	{
761	assert (!next->stack);
762	allocate_stack (next, 1);
763	coro_create (&(next->stack->cctx),
764	setup_coro, (void *)next,
765	next->stack->sptr, labs (next->stack->ssize));
766	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
767	/* don't add any code here */
768	}
769	}
770	else
771	setup_coro (next);
772	}	1034	}
773		1035
774	/*	1036	prev__cctx = prev->cctx;
775	* xnext is now either prev or next, depending on wether	1037
776	* we switched the c stack or not. that's why I use a global	1038	/* possibly "free" the cctx */
777	* variable, that should become thread-specific at one point.	1039	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
778	*/	1040	{
779	xnext->cursp = stacklevel;	1041	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
780	}	1042	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
781		1043
782	if (coro_mortal)	1044	prev->cctx = 0;
		1045
		1046	cctx_put (prev__cctx);
		1047	}
		1048
		1049	++next->usecount;
		1050
		1051	if (!next->cctx)
		1052	next->cctx = cctx_get (aTHX);
		1053
		1054	if (prev__cctx != next->cctx)
		1055	{
		1056	prev__cctx->top_env = PL_top_env;
		1057	PL_top_env = next->cctx->top_env;
		1058	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1059	}
		1060
		1061	free_coro_mortal (aTHX);
		1062	UNLOCK;
783	{	1063	}
784	SvREFCNT_dec (coro_mortal);	1064	}
785	coro_mortal = 0;	1065
		1066	struct transfer_args
		1067	{
		1068	struct coro *prev, *next;
		1069	};
		1070
		1071	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1072	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1073
		1074	/** high level stuff ********************************************************/
		1075
		1076	static int
		1077	coro_state_destroy (pTHX_ struct coro *coro)
		1078	{
		1079	if (coro->flags & CF_DESTROYED)
		1080	return 0;
		1081
		1082	coro->flags |= CF_DESTROYED;
		1083
		1084	if (coro->flags & CF_READY)
786	}	1085	{
787	}	1086	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1087	/* alternative: look through all ready queues and remove the coro */
		1088	LOCK;
		1089	--coro_nready;
		1090	UNLOCK;
		1091	}
		1092	else
		1093	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
788		1094
789	#define SV_CORO(sv,func) \	1095	if (coro->mainstack && coro->mainstack != main_mainstack)
790	do { \	1096	{
791	if (SvROK (sv)) \	1097	struct coro temp;
792	sv = SvRV (sv); \
793	\
794	if (SvTYPE(sv) == SVt_PVHV) \
795	{ \
796	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
797	\
798	if (!he) \
799	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
800	\
801	(sv) = SvRV (HeVAL(he)); \
802	} \
803	\
804	/* must also be changed inside Coro::Cont::yield */ \
805	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
806	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
807	\
808	} while(0)
809		1098
810	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1099	if (coro->flags & CF_RUNNING)
		1100	croak ("FATAL: tried to destroy currently running coroutine");
811		1101
		1102	save_perl (aTHX_ &temp);
		1103	load_perl (aTHX_ coro);
		1104
		1105	coro_destroy (aTHX_ coro);
		1106
		1107	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1108
		1109	coro->mainstack = 0;
		1110	}
		1111
		1112	cctx_destroy (coro->cctx);
		1113	SvREFCNT_dec (coro->args);
		1114
		1115	if (coro->next) coro->next->prev = coro->prev;
		1116	if (coro->prev) coro->prev->next = coro->next;
		1117	if (coro == coro_first) coro_first = coro->next;
		1118
		1119	return 1;
		1120	}
		1121
812	static void	1122	static int
		1123	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1124	{
		1125	struct coro *coro = (struct coro *)mg->mg_ptr;
		1126	mg->mg_ptr = 0;
		1127
		1128	coro->hv = 0;
		1129
		1130	if (--coro->refcnt < 0)
		1131	{
		1132	coro_state_destroy (aTHX_ coro);
		1133	Safefree (coro);
		1134	}
		1135
		1136	return 0;
		1137	}
		1138
		1139	static int
		1140	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1141	{
		1142	struct coro *coro = (struct coro *)mg->mg_ptr;
		1143
		1144	++coro->refcnt;
		1145
		1146	return 0;
		1147	}
		1148
		1149	static MGVTBL coro_state_vtbl = {
		1150	0, 0, 0, 0,
		1151	coro_state_free,
		1152	0,
		1153	#ifdef MGf_DUP
		1154	coro_state_dup,
		1155	#else
		1156	# define MGf_DUP 0
		1157	#endif
		1158	};
		1159
		1160	static void
		1161	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1162	{
		1163	ta->prev = SvSTATE (prev_sv);
		1164	ta->next = SvSTATE (next_sv);
		1165	TRANSFER_CHECK (*ta);
		1166	}
		1167
		1168	static void
813	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1169	api_transfer (SV *prev_sv, SV *next_sv)
814	{	1170	{
815	SV_CORO (prev, "Coro::transfer");	1171	dTHX;
816	SV_CORO (next, "Coro::transfer");	1172	struct transfer_args ta;
817		1173
818	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	1174	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1175	TRANSFER (ta);
819	}	1176	}
820		1177
821	/** Coro ********************************************************************/	1178	/** Coro ********************************************************************/
822		1179
823	#define PRIO_MAX 3
824	#define PRIO_HIGH 1
825	#define PRIO_NORMAL 0
826	#define PRIO_LOW -1
827	#define PRIO_IDLE -3
828	#define PRIO_MIN -4
829
830	/* for Coro.pm */
831	static GV *coro_current, *coro_idle;
832	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
833	static int coro_nready;
834
835	static void	1180	static void
836	coro_enq (SV *sv)	1181	coro_enq (pTHX_ SV *coro_sv)
837	{	1182	{
838	if (SvTYPE (sv) == SVt_PVHV)
839	{
840	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
841	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
842
843	prio = prio > PRIO_MAX ? PRIO_MAX
844	: prio < PRIO_MIN ? PRIO_MIN
845	: prio;
846
847	av_push (coro_ready [prio - PRIO_MIN], sv);	1183	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
848	coro_nready++;
849
850	return;
851	}
852
853	croak ("Coro::ready tried to enqueue something that is not a coroutine");
854	}	1184	}
855		1185
856	static SV *	1186	static SV *
857	coro_deq (int min_prio)	1187	coro_deq (pTHX_ int min_prio)
858	{	1188	{
859	int prio = PRIO_MAX - PRIO_MIN;	1189	int prio = PRIO_MAX - PRIO_MIN;
860		1190
861	min_prio -= PRIO_MIN;	1191	min_prio -= PRIO_MIN;
862	if (min_prio < 0)	1192	if (min_prio < 0)
863	min_prio = 0;	1193	min_prio = 0;
864		1194
865	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1195	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
866	if (av_len (coro_ready[prio]) >= 0)	1196	if (AvFILLp (coro_ready [prio]) >= 0)
867	{
868	coro_nready--;
869	return av_shift (coro_ready[prio]);	1197	return av_shift (coro_ready [prio]);
870	}
871		1198
872	return 0;	1199	return 0;
873	}	1200	}
874		1201
875	static void	1202	static int
876	api_ready (SV *coro)	1203	api_ready (SV *coro_sv)
877	{	1204	{
		1205	dTHX;
		1206	struct coro *coro;
		1207
878	if (SvROK (coro))	1208	if (SvROK (coro_sv))
879	coro = SvRV (coro);	1209	coro_sv = SvRV (coro_sv);
880		1210
		1211	coro = SvSTATE (coro_sv);
		1212
		1213	if (coro->flags & CF_READY)
		1214	return 0;
		1215
		1216	coro->flags |= CF_READY;
		1217
		1218	LOCK;
881	coro_enq (SvREFCNT_inc (coro));	1219	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1220	++coro_nready;
		1221	UNLOCK;
		1222
		1223	return 1;
		1224	}
		1225
		1226	static int
		1227	api_is_ready (SV *coro_sv)
		1228	{
		1229	dTHX;
		1230	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1231	}
		1232
		1233	static void
		1234	prepare_schedule (pTHX_ struct transfer_args *ta)
		1235	{
		1236	SV *prev_sv, *next_sv;
		1237
		1238	for (;;)
		1239	{
		1240	LOCK;
		1241	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1242
		1243	/* nothing to schedule: call the idle handler */
		1244	if (!next_sv)
		1245	{
		1246	dSP;
		1247	UNLOCK;
		1248
		1249	ENTER;
		1250	SAVETMPS;
		1251
		1252	PUSHMARK (SP);
		1253	PUTBACK;
		1254	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1255
		1256	FREETMPS;
		1257	LEAVE;
		1258	continue;
		1259	}
		1260
		1261	ta->next = SvSTATE (next_sv);
		1262
		1263	/* cannot transfer to destroyed coros, skip and look for next */
		1264	if (ta->next->flags & CF_DESTROYED)
		1265	{
		1266	UNLOCK;
		1267	SvREFCNT_dec (next_sv);
		1268	/* coro_nready is already taken care of by destroy */
		1269	continue;
		1270	}
		1271
		1272	--coro_nready;
		1273	UNLOCK;
		1274	break;
		1275	}
		1276
		1277	/* free this only after the transfer */
		1278	prev_sv = SvRV (coro_current);
		1279	ta->prev = SvSTATE (prev_sv);
		1280	TRANSFER_CHECK (*ta);
		1281	assert (ta->next->flags & CF_READY);
		1282	ta->next->flags &= ~CF_READY;
		1283	SvRV_set (coro_current, next_sv);
		1284
		1285	LOCK;
		1286	free_coro_mortal (aTHX);
		1287	coro_mortal = prev_sv;
		1288	UNLOCK;
		1289	}
		1290
		1291	static void
		1292	prepare_cede (pTHX_ struct transfer_args *ta)
		1293	{
		1294	api_ready (coro_current);
		1295	prepare_schedule (aTHX_ ta);
		1296	}
		1297
		1298	static int
		1299	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1300	{
		1301	if (coro_nready)
		1302	{
		1303	SV *prev = SvRV (coro_current);
		1304	prepare_schedule (aTHX_ ta);
		1305	api_ready (prev);
		1306	return 1;
		1307	}
		1308	else
		1309	return 0;
882	}	1310	}
883		1311
884	static void	1312	static void
885	api_schedule (void)	1313	api_schedule (void)
886	{	1314	{
887	SV *prev, *next;	1315	dTHX;
		1316	struct transfer_args ta;
888		1317
889	prev = SvRV (GvSV (coro_current));	1318	prepare_schedule (aTHX_ &ta);
890	next = coro_deq (PRIO_MIN);	1319	TRANSFER (ta);
891
892	if (!next)
893	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
894
895	/* free this only after the transfer */
896	coro_mortal = prev;
897	SV_CORO (prev, "Coro::schedule");
898
899	SvRV (GvSV (coro_current)) = next;
900
901	SV_CORO (next, "Coro::schedule");
902
903	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
904	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
905	}	1320	}
906		1321
907	static void	1322	static int
908	api_cede (void)	1323	api_cede (void)
909	{	1324	{
910	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1325	dTHX;
		1326	struct transfer_args ta;
911		1327
912	api_schedule ();	1328	prepare_cede (aTHX_ &ta);
913	}
914		1329
		1330	if (ta.prev != ta.next)
		1331	{
		1332	TRANSFER (ta);
		1333	return 1;
		1334	}
		1335	else
		1336	return 0;
		1337	}
		1338
		1339	static int
		1340	api_cede_notself (void)
		1341	{
		1342	dTHX;
		1343	struct transfer_args ta;
		1344
		1345	if (prepare_cede_notself (aTHX_ &ta))
		1346	{
		1347	TRANSFER (ta);
		1348	return 1;
		1349	}
		1350	else
		1351	return 0;
		1352	}
		1353
		1354	static void
		1355	api_trace (SV *coro_sv, int flags)
		1356	{
		1357	dTHX;
		1358	struct coro *coro = SvSTATE (coro_sv);
		1359
		1360	if (flags & CC_TRACE)
		1361	{
		1362	if (!coro->cctx)
		1363	coro->cctx = cctx_new ();
		1364	else if (!(coro->cctx->flags & CC_TRACE))
		1365	croak ("cannot enable tracing on coroutine with custom stack");
		1366
		1367	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1368	}
		1369	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1370	{
		1371	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1372
		1373	if (coro->flags & CF_RUNNING)
		1374	PL_runops = RUNOPS_DEFAULT;
		1375	else
		1376	coro->runops = RUNOPS_DEFAULT;
		1377	}
		1378	}
		1379
915	MODULE = Coro::State PACKAGE = Coro::State	1380	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
916		1381
917	PROTOTYPES: ENABLE	1382	PROTOTYPES: DISABLE
918		1383
919	BOOT:	1384	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1385	{
921	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1386	#ifdef USE_ITHREADS
922	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1387	MUTEX_INIT (&coro_mutex);
		1388	#endif
		1389	BOOT_PAGESIZE;
		1390
		1391	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1392
923	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1393	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
924		1394
925	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1395	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
926	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1396	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
927	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1397	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
928	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1398	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
929
930	if (!padlist_cache)
931	padlist_cache = newHV ();
932		1399
933	main_mainstack = PL_mainstack;	1400	main_mainstack = PL_mainstack;
		1401	main_top_env = PL_top_env;
		1402
		1403	while (main_top_env->je_prev)
		1404	main_top_env = main_top_env->je_prev;
934		1405
935	coroapi.ver = CORO_API_VERSION;	1406	coroapi.ver = CORO_API_VERSION;
936	coroapi.transfer = api_transfer;	1407	coroapi.transfer = api_transfer;
937	}
938		1408
939	Coro::State	1409	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
940	_newprocess(args)	1410	}
941	SV * args	1411
942	PROTOTYPE: $	1412	SV *
		1413	new (char *klass, ...)
943	CODE:	1414	CODE:
944	Coro__State coro;	1415	{
		1416	struct coro *coro;
		1417	HV *hv;
		1418	int i;
945		1419
946	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
947	croak ("Coro::State::_newprocess expects an arrayref");
948
949	Newz (0, coro, 1, struct coro);	1420	Newz (0, coro, 1, struct coro);
		1421	coro->args = newAV ();
		1422	coro->flags = CF_NEW;
950		1423
951	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1424	if (coro_first) coro_first->prev = coro;
952	coro->mainstack = 0; /* actual work is done inside transfer */	1425	coro->next = coro_first;
953	coro->stack = 0;	1426	coro_first = coro;
954		1427
955	/* same as JMPENV_BOOTSTRAP */	1428	coro->hv = hv = newHV ();
956	/* we might be able to recycle start_env, but safe is safe */	1429	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
957	//Zero(&coro->start_env, 1, JMPENV);	1430	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
958	coro->start_env.je_ret = -1;
959	coro->start_env.je_mustcatch = TRUE;
960		1431
961	RETVAL = coro;	1432	for (i = 1; i < items; i++)
		1433	av_push (coro->args, newSVsv (ST (i)));
		1434	}
962	OUTPUT:	1435	OUTPUT:
963	RETVAL	1436	RETVAL
964		1437
		1438	# these not obviously related functions are all rolled into the same xs
		1439	# function to increase chances that they all will call transfer with the same
		1440	# stack offset
965	void	1441	void
966	transfer(prev, next, flags)	1442	_set_stacklevel (...)
967	SV *prev	1443	ALIAS:
968	SV *next	1444	Coro::State::transfer = 1
969	int flags	1445	Coro::schedule = 2
970	PROTOTYPE: @	1446	Coro::cede = 3
		1447	Coro::cede_notself = 4
971	CODE:	1448	CODE:
972	PUTBACK;	1449	{
973	SV_CORO (next, "Coro::transfer");	1450	struct transfer_args ta;
974	SV_CORO (prev, "Coro::transfer");	1451
975	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1452	switch (ix)
976	SPAGAIN;	1453	{
		1454	case 0:
		1455	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1456	ta.next = 0;
		1457	break;
		1458
		1459	case 1:
		1460	if (items != 2)
		1461	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1462
		1463	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1464	break;
		1465
		1466	case 2:
		1467	prepare_schedule (aTHX_ &ta);
		1468	break;
		1469
		1470	case 3:
		1471	prepare_cede (aTHX_ &ta);
		1472	break;
		1473
		1474	case 4:
		1475	if (!prepare_cede_notself (aTHX_ &ta))
		1476	XSRETURN_EMPTY;
		1477
		1478	break;
		1479	}
		1480
		1481	BARRIER;
		1482	TRANSFER (ta);
		1483
		1484	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1485	XSRETURN_YES;
		1486	}
		1487
		1488	bool
		1489	_destroy (SV *coro_sv)
		1490	CODE:
		1491	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1492	OUTPUT:
		1493	RETVAL
977		1494
978	void	1495	void
979	DESTROY(coro)
980	Coro::State coro
981	CODE:
982
983	if (coro->mainstack && coro->mainstack != main_mainstack)
984	{
985	struct coro temp;
986
987	PUTBACK;
988	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
989	LOAD(aTHX_ coro);
990	SPAGAIN;
991
992	destroy_stacks (aTHX);
993
994	LOAD((&temp)); /* this will get rid of defsv etc.. */
995	SPAGAIN;
996
997	coro->mainstack = 0;
998	}
999
1000	deallocate_stack (coro);
1001	SvREFCNT_dec (coro->args);
1002	Safefree (coro);
1003
1004	void
1005	_exit(code)	1496	_exit (code)
1006	int code	1497	int code
1007	PROTOTYPE: $	1498	PROTOTYPE: $
1008	CODE:	1499	CODE:
1009	_exit (code);	1500	_exit (code);
1010		1501
1011	MODULE = Coro::State PACKAGE = Coro::Cont	1502	int
		1503	cctx_stacksize (int new_stacksize = 0)
		1504	CODE:
		1505	RETVAL = coro_stacksize;
		1506	if (new_stacksize)
		1507	coro_stacksize = new_stacksize;
		1508	OUTPUT:
		1509	RETVAL
1012		1510
1013	# this is slightly dirty (should expose a c-level api)	1511	int
		1512	cctx_count ()
		1513	CODE:
		1514	RETVAL = cctx_count;
		1515	OUTPUT:
		1516	RETVAL
		1517
		1518	int
		1519	cctx_idle ()
		1520	CODE:
		1521	RETVAL = cctx_idle;
		1522	OUTPUT:
		1523	RETVAL
1014		1524
1015	void	1525	void
1016	yield(...)	1526	list ()
1017	PROTOTYPE: @	1527	PPCODE:
		1528	{
		1529	struct coro *coro;
		1530	for (coro = coro_first; coro; coro = coro->next)
		1531	if (coro->hv)
		1532	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1533	}
		1534
		1535	void
		1536	call (Coro::State coro, SV *coderef)
		1537	ALIAS:
		1538	eval = 1
		1539	CODE:
		1540	{
		1541	if (coro->mainstack)
		1542	{
		1543	struct coro temp;
		1544	Zero (&temp, 1, struct coro);
		1545
		1546	if (!(coro->flags & CF_RUNNING))
		1547	{
		1548	save_perl (aTHX_ &temp);
		1549	load_perl (aTHX_ coro);
		1550	}
		1551
		1552	{
		1553	dSP;
		1554	ENTER;
		1555	SAVETMPS;
		1556	PUSHMARK (SP);
		1557	PUTBACK;
		1558	if (ix)
		1559	eval_sv (coderef, 0);
		1560	else
		1561	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1562	SPAGAIN;
		1563	FREETMPS;
		1564	LEAVE;
		1565	PUTBACK;
		1566	}
		1567
		1568	if (!(coro->flags & CF_RUNNING))
		1569	{
		1570	save_perl (aTHX_ coro);
		1571	load_perl (aTHX_ &temp);
		1572	}
		1573	}
		1574	}
		1575
		1576	SV *
		1577	is_ready (Coro::State coro)
		1578	PROTOTYPE: $
		1579	ALIAS:
		1580	is_ready = CF_READY
		1581	is_running = CF_RUNNING
		1582	is_new = CF_NEW
		1583	is_destroyed = CF_DESTROYED
		1584	CODE:
		1585	RETVAL = boolSV (coro->flags & ix);
		1586	OUTPUT:
		1587	RETVAL
		1588
		1589	void
		1590	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1591
		1592	SV *
		1593	has_stack (Coro::State coro)
		1594	PROTOTYPE: $
		1595	CODE:
		1596	RETVAL = boolSV (!!coro->cctx);
		1597	OUTPUT:
		1598	RETVAL
		1599
		1600	int
		1601	is_traced (Coro::State coro)
		1602	PROTOTYPE: $
		1603	CODE:
		1604	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1605	OUTPUT:
		1606	RETVAL
		1607
		1608	IV
		1609	rss (Coro::State coro)
		1610	PROTOTYPE: $
		1611	ALIAS:
		1612	usecount = 1
1018	CODE:	1613	CODE:
1019	static SV *returnstk;	1614	switch (ix)
1020	SV *sv;	1615	{
1021	AV *defav = GvAV (PL_defgv);	1616	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1022	struct coro *prev, *next;	1617	case 1: RETVAL = coro->usecount; break;
		1618	}
		1619	OUTPUT:
		1620	RETVAL
1023		1621
1024	if (!returnstk)
1025	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1026
1027	/* set up @_ -- ugly */
1028	av_clear (defav);
1029	av_fill (defav, items - 1);
1030	while (items--)
1031	av_store (defav, items, SvREFCNT_inc (ST(items)));
1032
1033	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1034	sv = av_pop ((AV *)SvRV (returnstk));
1035	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1036	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1037	SvREFCNT_dec (sv);
1038
1039	transfer(aTHX_ prev, next, 0);
1040		1622
1041	MODULE = Coro::State PACKAGE = Coro	1623	MODULE = Coro::State PACKAGE = Coro
1042		1624
1043	# this is slightly dirty (should expose a c-level api)
1044
1045	BOOT:	1625	BOOT:
1046	{	1626	{
1047	int i;	1627	int i;
		1628
		1629	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1630	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1631	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1632
		1633	coro_current = get_sv ("Coro::current", FALSE);
		1634	SvREADONLY_on (coro_current);
		1635
1048	HV *stash = gv_stashpv ("Coro", TRUE);	1636	coro_stash = gv_stashpv ("Coro", TRUE);
1049		1637
1050	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1638	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1051	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1639	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1052	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1640	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1053	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1641	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1054	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1642	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1055	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1643	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1056
1057	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1058	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1059		1644
1060	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1645	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1061	coro_ready[i] = newAV ();	1646	coro_ready[i] = newAV ();
1062		1647
1063	{	1648	{
1064	SV *sv = perl_get_sv("Coro::API", 1);	1649	SV *sv = perl_get_sv("Coro::API", 1);
1065		1650
1066	coroapi.schedule = api_schedule;	1651	coroapi.schedule = api_schedule;
1067	coroapi.cede = api_cede;	1652	coroapi.cede = api_cede;
		1653	coroapi.cede_notself = api_cede_notself;
1068	coroapi.ready = api_ready;	1654	coroapi.ready = api_ready;
		1655	coroapi.is_ready = api_is_ready;
1069	coroapi.nready = &coro_nready;	1656	coroapi.nready = &coro_nready;
1070	coroapi.current = coro_current;	1657	coroapi.current = coro_current;
1071		1658
1072	GCoroAPI = &coroapi;	1659	GCoroAPI = &coroapi;
1073	sv_setiv(sv, (IV)&coroapi);	1660	sv_setiv (sv, (IV)&coroapi);
1074	SvREADONLY_on(sv);	1661	SvREADONLY_on (sv);
1075	}	1662	}
1076	}	1663	}
1077		1664
1078	#if !PERL_MICRO
1079
1080	void	1665	void
1081	ready(self)	1666	_set_current (SV *current)
1082	SV * self
1083	PROTOTYPE: $	1667	PROTOTYPE: $
1084	CODE:	1668	CODE:
1085	api_ready (self);	1669	SvREFCNT_dec (SvRV (coro_current));
1086		1670	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1087	#endif
1088		1671
1089	int	1672	int
		1673	prio (Coro::State coro, int newprio = 0)
		1674	ALIAS:
		1675	nice = 1
		1676	CODE:
		1677	{
		1678	RETVAL = coro->prio;
		1679
		1680	if (items > 1)
		1681	{
		1682	if (ix)
		1683	newprio = coro->prio - newprio;
		1684
		1685	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1686	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1687
		1688	coro->prio = newprio;
		1689	}
		1690	}
		1691	OUTPUT:
		1692	RETVAL
		1693
		1694	SV *
		1695	ready (SV *self)
		1696	PROTOTYPE: $
		1697	CODE:
		1698	RETVAL = boolSV (api_ready (self));
		1699	OUTPUT:
		1700	RETVAL
		1701
		1702	int
1090	nready(...)	1703	nready (...)
1091	PROTOTYPE:	1704	PROTOTYPE:
1092	CODE:	1705	CODE:
1093	RETVAL = coro_nready;	1706	RETVAL = coro_nready;
1094	OUTPUT:	1707	OUTPUT:
1095	RETVAL	1708	RETVAL
1096		1709
		1710	# for async_pool speedup
1097	void	1711	void
1098	schedule(...)	1712	_pool_1 (SV *cb)
1099	PROTOTYPE:
1100	CODE:	1713	CODE:
1101	api_schedule ();	1714	{
		1715	struct coro *coro = SvSTATE (coro_current);
		1716	HV *hv = (HV *)SvRV (coro_current);
		1717	AV *defav = GvAV (PL_defgv);
		1718	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1719	AV *invoke_av;
		1720	int i, len;
		1721
		1722	if (!invoke)
		1723	croak ("\3terminate\2\n");
		1724
		1725	SvREFCNT_dec (coro->saved_deffh);
		1726	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1727
		1728	hv_store (hv, "desc", sizeof ("desc") - 1,
		1729	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1730
		1731	invoke_av = (AV *)SvRV (invoke);
		1732	len = av_len (invoke_av);
		1733
		1734	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1735
		1736	if (len > 0)
		1737	{
		1738	av_fill (defav, len - 1);
		1739	for (i = 0; i < len; ++i)
		1740	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1741	}
		1742
		1743	SvREFCNT_dec (invoke);
		1744	}
1102		1745
1103	void	1746	void
1104	cede(...)	1747	_pool_2 (SV *cb)
1105	PROTOTYPE:
1106	CODE:	1748	CODE:
1107	api_cede ();	1749	{
		1750	struct coro *coro = SvSTATE (coro_current);
1108		1751
		1752	sv_setsv (cb, &PL_sv_undef);
		1753
		1754	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1755	coro->saved_deffh = 0;
		1756
		1757	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1758	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1759	croak ("\3terminate\2\n");
		1760
		1761	av_clear (GvAV (PL_defgv));
		1762	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1763	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1764
		1765	coro->prio = 0;
		1766
		1767	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1768	api_trace (coro_current, 0);
		1769
		1770	av_push (av_async_pool, newSVsv (coro_current));
		1771	}
		1772
		1773
		1774	MODULE = Coro::State PACKAGE = Coro::AIO
		1775
		1776	SV *
		1777	_get_state ()
		1778	CODE:
		1779	{
		1780	struct io_state *data;
		1781
		1782	RETVAL = newSV (sizeof (struct io_state));
		1783	data = (struct io_state *)SvPVX (RETVAL);
		1784	SvCUR_set (RETVAL, sizeof (struct io_state));
		1785	SvPOK_only (RETVAL);
		1786
		1787	data->errorno = errno;
		1788	data->laststype = PL_laststype;
		1789	data->laststatval = PL_laststatval;
		1790	data->statcache = PL_statcache;
		1791	}
		1792	OUTPUT:
		1793	RETVAL
		1794
		1795	void
		1796	_set_state (char *data_)
		1797	PROTOTYPE: $
		1798	CODE:
		1799	{
		1800	struct io_state *data = (void *)data_;
		1801
		1802	errno = data->errorno;
		1803	PL_laststype = data->laststype;
		1804	PL_laststatval = data->laststatval;
		1805	PL_statcache = data->statcache;
		1806	}
		1807

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