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Comparing Coro/Coro/State.xs (file contents):
Revision 1.50 by pcg, Sun Nov 30 16:59:15 2003 UTC vs.
Revision 1.185 by root, Thu Oct 4 19:35:08 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 assumption that coroutines do not usually need	476	* on the (sometimes correct) assumption that coroutines do
475	* 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	while (PL_scopestack_ix)
525	LEAVE;
526
527	/* sure it is, but more important: is it correct?? :/ */
528	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
529	FREETMPS;
530	}
531
532	while (PL_curstackinfo->si_next)	529	while (PL_curstackinfo->si_next)
533	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
534		531
535	while (PL_curstackinfo)	532	while (PL_curstackinfo)
536	{	533	{
537	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
538		535
539	{
540	dSP;
541	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
542	PUTBACK; /* possibly superfluous */
543	}
544
545	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
546	{
547	dounwind(-1);
548	SvREFCNT_dec(PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
549	}
550		538
551	Safefree(PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
552	Safefree(PL_curstackinfo);	540	Safefree (PL_curstackinfo);
553	PL_curstackinfo = p;	541	PL_curstackinfo = p;
554	}	542	}
555		543
556	Safefree(PL_tmps_stack);	544	Safefree (PL_tmps_stack);
557	Safefree(PL_markstack);	545	Safefree (PL_markstack);
558	Safefree(PL_scopestack);	546	Safefree (PL_scopestack);
559	Safefree(PL_savestack);	547	Safefree (PL_savestack);
		548	#if !PERL_VERSION_ATLEAST (5,9,0)
560	Safefree(PL_retstack);	549	Safefree (PL_retstack);
561	}
562
563	static void
564	allocate_stack (Coro__State ctx, int alloc)
565	{
566	coro_stack *stack;
567
568	New (0, stack, 1, coro_stack);
569
570	stack->refcnt = 1;
571	stack->usecnt = 1;
572	stack->gencnt = ctx->gencnt = 0;
573	if (alloc)
574	{
575	#if HAVE_MMAP
576	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
577	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
578	if (stack->sptr == (void *)-1)
579	#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)
580	{	561	{
581	/*FIXME*//*D*//* reasonable stack size! */	562	#define VAR(name,type)coro->name = PL_ ## name;
582	stack->ssize = -4096 * sizeof (long);	563	# include "state.h"
583	New (0, stack->sptr, 4096, long);	564	#undef VAR
584	}	565	}
585	}
586	else
587	stack->sptr = 0;
588		566
589	ctx->stack = stack;	567	rss += sizeof (coro->curstackinfo);
590	}	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);
591		575
592	static void	576	#if !PERL_VERSION_ATLEAST (5,9,0)
593	deallocate_stack (Coro__State ctx)	577	rss += coro->retstack_max * sizeof (OP *);
594	{	578	#endif
595	coro_stack *stack = ctx->stack;
596
597	ctx->stack = 0;
598
599	if (stack)
600	{	579	}
601	if (!--stack->refcnt)
602	{
603	#ifdef HAVE_MMAP
604	if (stack->ssize > 0 && stack->sptr)
605	munmap (stack->sptr, stack->ssize);
606	else
607	#endif
608	Safefree (stack->sptr);
609		580
610	Safefree (stack);	581	return rss;
611	}
612	else if (ctx->gencnt == stack->gencnt)
613	--stack->usecnt;
614	}
615	}	582	}
616		583
		584	/** coroutine stack handling ************************************************/
		585
617	static void	586	static void
618	setup_coro (void *arg)	587	coro_setup (pTHX_ struct coro *coro)
619	{	588	{
620	/*	589	/*
621	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
622	*/	591	*/
		592	coro_init_stacks (aTHX);
		593
		594	PL_runops = RUNOPS_DEFAULT;
		595	PL_curcop = &PL_compiling;
		596	PL_in_eval = EVAL_NULL;
		597	PL_comppad = 0;
		598	PL_curpm = 0;
		599	PL_localizing = 0;
		600	PL_dirty = 0;
		601	PL_restartop = 0;
		602
		603	GvSV (PL_defgv) = NEWSV (0, 0);
		604	GvAV (PL_defgv) = coro->args; coro->args = 0;
		605	GvSV (PL_errgv) = NEWSV (0, 0);
		606	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		607	PL_rs = newSVsv (GvSV (irsgv));
		608
		609	{
		610	IO *io = newIO ();
		611	PL_defoutgv = newGVgen ("Coro");
		612	GvIOp(PL_defoutgv) = io;
		613	IoTYPE (io) = IoTYPE_WRONLY;
		614	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		615	IoFLAGS (io) |= IOf_FLUSH;
		616	}
		617
		618	{
		619	dSP;
		620	LOGOP myop;
		621
		622	Zero (&myop, 1, LOGOP);
		623	myop.op_next = Nullop;
		624	myop.op_flags = OPf_WANT_VOID;
		625
		626	PUSHMARK (SP);
		627	XPUSHs (av_shift (GvAV (PL_defgv)));
		628	PUTBACK;
		629	PL_op = (OP *)&myop;
		630	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		631	SPAGAIN;
		632	}
		633
		634	ENTER; /* necessary e.g. for dounwind */
		635	}
		636
		637	static void
		638	coro_destroy (pTHX_ struct coro *coro)
		639	{
		640	if (!IN_DESTRUCT)
		641	{
		642	/* restore all saved variables and stuff */
		643	LEAVE_SCOPE (0);
		644	assert (PL_tmps_floor == -1);
		645
		646	/* free all temporaries */
		647	FREETMPS;
		648	assert (PL_tmps_ix == -1);
		649
		650	/* unwind all extra stacks */
		651	POPSTACK_TO (PL_mainstack);
		652
		653	/* unwind main stack */
		654	dounwind (-1);
		655	}
		656
		657	SvREFCNT_dec (GvSV (PL_defgv));
		658	SvREFCNT_dec (GvAV (PL_defgv));
		659	SvREFCNT_dec (GvSV (PL_errgv));
		660	SvREFCNT_dec (PL_defoutgv);
		661	SvREFCNT_dec (PL_rs);
		662	SvREFCNT_dec (GvSV (irsgv));
		663
		664	SvREFCNT_dec (coro->saved_deffh);
		665	//SvREFCNT_dec (coro->throw);
		666
		667	coro_destroy_stacks (aTHX);
		668	}
		669
		670	static void
		671	free_coro_mortal (pTHX)
		672	{
		673	if (coro_mortal)
		674	{
		675	SvREFCNT_dec (coro_mortal);
		676	coro_mortal = 0;
		677	}
		678	}
		679
		680	static int
		681	runops_trace (pTHX)
		682	{
		683	COP *oldcop = 0;
		684	int oldcxix = -2;
		685	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		686	coro_cctx *cctx = coro->cctx;
		687
		688	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		689	{
		690	PERL_ASYNC_CHECK ();
		691
		692	if (cctx->flags & CC_TRACE_ALL)
		693	{
		694	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		695	{
		696	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		697	SV **bot, **top;
		698	AV *av = newAV (); /* return values */
		699	SV **cb;
		700	dSP;
		701
		702	GV *gv = CvGV (cx->blk_sub.cv);
		703	SV *fullname = sv_2mortal (newSV (0));
		704	if (isGV (gv))
		705	gv_efullname3 (fullname, gv, 0);
		706
		707	bot = PL_stack_base + cx->blk_oldsp + 1;
		708	top = cx->blk_gimme == G_ARRAY ? SP + 1
		709	: cx->blk_gimme == G_SCALAR ? bot + 1
		710	: bot;
		711
		712	while (bot < top)
		713	av_push (av, SvREFCNT_inc (*bot++));
		714
		715	PL_runops = RUNOPS_DEFAULT;
		716	ENTER;
		717	SAVETMPS;
		718	EXTEND (SP, 3);
		719	PUSHMARK (SP);
		720	PUSHs (&PL_sv_no);
		721	PUSHs (fullname);
		722	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		723	PUTBACK;
		724	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		725	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		726	SPAGAIN;
		727	FREETMPS;
		728	LEAVE;
		729	PL_runops = runops_trace;
		730	}
		731
		732	if (oldcop != PL_curcop)
		733	{
		734	oldcop = PL_curcop;
		735
		736	if (PL_curcop != &PL_compiling)
		737	{
		738	SV **cb;
		739
		740	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		741	{
		742	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		743
		744	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		745	{
		746	runops_proc_t old_runops = PL_runops;
		747	dSP;
		748	GV *gv = CvGV (cx->blk_sub.cv);
		749	SV *fullname = sv_2mortal (newSV (0));
		750
		751	if (isGV (gv))
		752	gv_efullname3 (fullname, gv, 0);
		753
		754	PL_runops = RUNOPS_DEFAULT;
		755	ENTER;
		756	SAVETMPS;
		757	EXTEND (SP, 3);
		758	PUSHMARK (SP);
		759	PUSHs (&PL_sv_yes);
		760	PUSHs (fullname);
		761	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		762	PUTBACK;
		763	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		764	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		765	SPAGAIN;
		766	FREETMPS;
		767	LEAVE;
		768	PL_runops = runops_trace;
		769	}
		770
		771	oldcxix = cxstack_ix;
		772	}
		773
		774	if (cctx->flags & CC_TRACE_LINE)
		775	{
		776	dSP;
		777
		778	PL_runops = RUNOPS_DEFAULT;
		779	ENTER;
		780	SAVETMPS;
		781	EXTEND (SP, 3);
		782	PL_runops = RUNOPS_DEFAULT;
		783	PUSHMARK (SP);
		784	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		785	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		786	PUTBACK;
		787	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		788	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		789	SPAGAIN;
		790	FREETMPS;
		791	LEAVE;
		792	PL_runops = runops_trace;
		793	}
		794	}
		795	}
		796	}
		797	}
		798
		799	TAINT_NOT;
		800	return 0;
		801	}
		802
		803	/* inject a fake call to Coro::State::_cctx_init into the execution */
		804	/* _cctx_init should be careful, as it could be called at almost any time */
		805	/* during execution of a perl program */
		806	static void NOINLINE
		807	prepare_cctx (pTHX_ coro_cctx *cctx)
		808	{
623	dSP;	809	dSP;
624	Coro__State ctx = (Coro__State)arg;	810	LOGOP myop;
625	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
626		811
627	coro_init_stacks (aTHX);	812	PL_top_env = &PL_start_env;
628	/*PL_curcop = 0;*/
629	/*PL_in_eval = PL_in_eval;*/ /* inherit */
630	SvREFCNT_dec (GvAV (PL_defgv));
631	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
632		813
		814	if (cctx->flags & CC_TRACE)
		815	PL_runops = runops_trace;
		816
		817	Zero (&myop, 1, LOGOP);
		818	myop.op_next = PL_op;
		819	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		820
		821	PUSHMARK (SP);
		822	EXTEND (SP, 2);
		823	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		824	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		825	PUTBACK;
		826	PL_op = (OP *)&myop;
		827	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
633	SPAGAIN;	828	SPAGAIN;
		829	}
634		830
635	if (ctx->stack)	831	/*
636	{	832	* this is a _very_ stripped down perl interpreter ;)
637	ctx->cursp = 0;	833	*/
		834	static void
		835	coro_run (void *arg)
		836	{
		837	dTHX;
638		838
639	PUSHMARK(SP);	839	/* coro_run is the alternative tail of transfer(), so unlock here. */
640	PUTBACK;	840	UNLOCK;
641	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
642		841
643	if (SvTRUE (ERRSV))	842	/* we now skip the entersub that lead to transfer() */
644	croak (NULL);	843	PL_op = PL_op->op_next;
645	else	844
646	croak ("FATAL: CCTXT coroutine returned!");	845	/* inject a fake subroutine call to cctx_init */
		846	prepare_cctx (aTHX_ (coro_cctx *)arg);
		847
		848	/* somebody or something will hit me for both perl_run and PL_restartop */
		849	PL_restartop = PL_op;
		850	perl_run (PL_curinterp);
		851
		852	/*
		853	* If perl-run returns we assume exit() was being called or the coro
		854	* fell off the end, which seems to be the only valid (non-bug)
		855	* reason for perl_run to return. We try to exit by jumping to the
		856	* bootstrap-time "top" top_env, as we cannot restore the "main"
		857	* coroutine as Coro has no such concept
		858	*/
		859	PL_top_env = main_top_env;
		860	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		861	}
		862
		863	static coro_cctx *
		864	cctx_new ()
		865	{
		866	coro_cctx *cctx;
		867	void *stack_start;
		868	size_t stack_size;
		869
		870	++cctx_count;
		871
		872	Newz (0, cctx, 1, coro_cctx);
		873
		874	#if HAVE_MMAP
		875
		876	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		877	/* mmap supposedly does allocate-on-write for us */
		878	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		879
		880	if (cctx->sptr != (void *)-1)
		881	{
		882	# if CORO_STACKGUARD
		883	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		884	# endif
		885	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		886	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		887	cctx->flags |= CC_MAPPED;
647	}	888	}
648	else	889	else
649	{	890	#endif
650	UNOP myop;
651
652	PL_op = (OP *)&myop;
653
654	Zero(&myop, 1, UNOP);
655	myop.op_next = Nullop;
656	myop.op_flags = OPf_WANT_VOID;
657
658	PUSHMARK(SP);
659	XPUSHs (sub_init);
660	/*
661	* the next line is slightly wrong, as PL_op->op_next
662	* is actually being executed so we skip the first op.
663	* that doesn't matter, though, since it is only
664	* pp_nextstate and we never return...
665	* ah yes, and I don't care anyways ;)
666	*/
667	PUTBACK;
668	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
669	SPAGAIN;
670
671	ENTER; /* necessary e.g. for dounwind */
672	}	891	{
673	}	892	cctx->ssize = coro_stacksize * (long)sizeof (long);
		893	New (0, cctx->sptr, coro_stacksize, long);
674		894
675	static void	895	if (!cctx->sptr)
676	continue_coro (void *arg)	896	{
677	{	897	perror ("FATAL: unable to allocate stack for coroutine");
678	/*	898	_exit (EXIT_FAILURE);
679	* this is a _very_ stripped down perl interpreter ;)	899	}
680	*/
681	Coro__State ctx = (Coro__State)arg;
682	JMPENV coro_start_env;
683		900
684	PL_top_env = &ctx->start_env;	901	stack_start = cctx->sptr;
		902	stack_size = cctx->ssize;
		903	}
685		904
686	ctx->cursp = 0;	905	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
687	PL_op = PL_op->op_next;	906	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
688	CALLRUNOPS(aTHX);
689		907
690	abort ();	908	return cctx;
691	}	909	}
692		910
693	STATIC void	911	static void
		912	cctx_destroy (coro_cctx *cctx)
		913	{
		914	if (!cctx)
		915	return;
		916
		917	--cctx_count;
		918
		919	#if CORO_USE_VALGRIND
		920	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		921	#endif
		922
		923	#if HAVE_MMAP
		924	if (cctx->flags & CC_MAPPED)
		925	munmap (cctx->sptr, cctx->ssize);
		926	else
		927	#endif
		928	Safefree (cctx->sptr);
		929
		930	Safefree (cctx);
		931	}
		932
		933	static coro_cctx *
		934	cctx_get (pTHX)
		935	{
		936	while (cctx_first)
		937	{
		938	coro_cctx *cctx = cctx_first;
		939	cctx_first = cctx->next;
		940	--cctx_idle;
		941
		942	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		943	return cctx;
		944
		945	cctx_destroy (cctx);
		946	}
		947
		948	return cctx_new ();
		949	}
		950
		951	static void
		952	cctx_put (coro_cctx *cctx)
		953	{
		954	/* free another cctx if overlimit */
		955	if (cctx_idle >= MAX_IDLE_CCTX)
		956	{
		957	coro_cctx *first = cctx_first;
		958	cctx_first = first->next;
		959	--cctx_idle;
		960
		961	cctx_destroy (first);
		962	}
		963
		964	++cctx_idle;
		965	cctx->next = cctx_first;
		966	cctx_first = cctx;
		967	}
		968
		969	/** coroutine switching *****************************************************/
		970
		971	static void NOINLINE
		972	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		973	{
		974	if (prev != next)
		975	{
		976	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		977	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		978
		979	if (next->flags & CF_RUNNING)
		980	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		981
		982	if (next->flags & CF_DESTROYED)
		983	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		984
		985	if (PL_lex_state != LEX_NOTPARSING)
		986	croak ("Coro::State::transfer called while parsing, but this is not supported");
		987	}
		988	}
		989
		990	/* always use the TRANSFER macro */
		991	static void NOINLINE
694	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	992	transfer (pTHX_ struct coro *prev, struct coro *next)
695	{	993	{
696	dSTACKLEVEL;	994	dSTACKLEVEL;
697	static struct coro *xnext;
698		995
		996	/* sometimes transfer is only called to set idle_sp */
		997	if (!next)
		998	{
		999	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1000	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1001	}
699	if (prev != next)	1002	else if (prev != next)
700	{	1003	{
701	xnext = next;	1004	coro_cctx *prev__cctx;
702		1005
703	if (next->mainstack)	1006	if (prev->flags & CF_NEW)
704	{	1007	{
705	SAVE (prev, flags);	1008	/* create a new empty context */
706	LOAD (next);	1009	Newz (0, prev->cctx, 1, coro_cctx);
707		1010	prev->flags &= ~CF_NEW;
708	/* mark this state as in-use */	1011	prev->flags |= CF_RUNNING;
709	next->mainstack = 0;
710	next->tmps_ix = -2;
711
712	/* stacklevel changed? if yes, grab the stack for us! */
713	if (flags & TRANSFER_SAVE_CCTXT)
714	{
715	if (!prev->stack)
716	allocate_stack (prev, 0);
717	else if (prev->cursp != stacklevel
718	&& prev->stack->usecnt > 1)
719	{
720	prev->gencnt = ++prev->stack->gencnt;
721	prev->stack->usecnt = 1;
722	}
723
724	/* has our stack been invalidated? */
725	if (next->stack && next->stack->gencnt != next->gencnt)
726	{
727	deallocate_stack (next);
728	allocate_stack (next, 1);
729	coro_create (&(next->stack->cctx),
730	continue_coro, (void *)next,
731	next->stack->sptr, labs (next->stack->ssize));
732	}
733
734	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
735	/* don't add any code here */
736	}
737
738	}	1012	}
739	else if (next->tmps_ix == -2)	1013
740	croak ("tried to transfer to running coroutine");	1014	prev->flags &= ~CF_RUNNING;
		1015	next->flags |= CF_RUNNING;
		1016
		1017	LOCK;
		1018
		1019	if (next->flags & CF_NEW)
		1020	{
		1021	/* need to start coroutine */
		1022	next->flags &= ~CF_NEW;
		1023	/* first get rid of the old state */
		1024	save_perl (aTHX_ prev);
		1025	/* setup coroutine call */
		1026	coro_setup (aTHX_ next);
		1027	}
741	else	1028	else
742	{	1029	{
743	SAVE (prev, -1); /* first get rid of the old state */	1030	/* coroutine already started */
744		1031	save_perl (aTHX_ prev);
745	if (flags & TRANSFER_SAVE_CCTXT)	1032	load_perl (aTHX_ next);
746	{
747	if (!prev->stack)
748	allocate_stack (prev, 0);
749
750	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
751	{
752	PL_top_env = &next->start_env;
753
754	setup_coro (next);
755
756	prev->stack->refcnt++;
757	prev->stack->usecnt++;
758	next->stack = prev->stack;
759	next->gencnt = prev->gencnt;
760	}
761	else
762	{
763	assert (!next->stack);
764	allocate_stack (next, 1);
765	coro_create (&(next->stack->cctx),
766	setup_coro, (void *)next,
767	next->stack->sptr, labs (next->stack->ssize));
768	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
769	/* don't add any code here */
770	}
771	}
772	else
773	setup_coro (next);
774	}	1033	}
775		1034
776	/*	1035	prev__cctx = prev->cctx;
777	* xnext is now either prev or next, depending on wether	1036
778	* we switched the c stack or not. that's why I use a global	1037	/* possibly "free" the cctx */
779	* variable, that should become thread-specific at one point.	1038	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
780	*/	1039	{
781	xnext->cursp = stacklevel;	1040	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
782	}	1041	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
783		1042
784	if (coro_mortal)	1043	prev->cctx = 0;
		1044
		1045	cctx_put (prev__cctx);
		1046	}
		1047
		1048	++next->usecount;
		1049
		1050	if (!next->cctx)
		1051	next->cctx = cctx_get (aTHX);
		1052
		1053	if (prev__cctx != next->cctx)
		1054	{
		1055	prev__cctx->top_env = PL_top_env;
		1056	PL_top_env = next->cctx->top_env;
		1057	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1058	}
		1059
		1060	free_coro_mortal (aTHX);
		1061	UNLOCK;
785	{	1062	}
786	SvREFCNT_dec (coro_mortal);	1063	}
787	coro_mortal = 0;	1064
		1065	struct transfer_args
		1066	{
		1067	struct coro *prev, *next;
		1068	};
		1069
		1070	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1071	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1072
		1073	/** high level stuff ********************************************************/
		1074
		1075	static int
		1076	coro_state_destroy (pTHX_ struct coro *coro)
		1077	{
		1078	if (coro->flags & CF_DESTROYED)
		1079	return 0;
		1080
		1081	coro->flags |= CF_DESTROYED;
		1082
		1083	if (coro->flags & CF_READY)
788	}	1084	{
789	}	1085	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1086	/* alternative: look through all ready queues and remove the coro */
		1087	LOCK;
		1088	--coro_nready;
		1089	UNLOCK;
		1090	}
		1091	else
		1092	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
790		1093
791	#define SV_CORO(sv,func) \	1094	if (coro->mainstack && coro->mainstack != main_mainstack)
792	do { \	1095	{
793	if (SvROK (sv)) \	1096	struct coro temp;
794	sv = SvRV (sv); \
795	\
796	if (SvTYPE(sv) == SVt_PVHV) \
797	{ \
798	HE *he = hv_fetch_ent((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
799	\
800	if (!he) \
801	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
802	\
803	(sv) = SvRV (HeVAL(he)); \
804	} \
805	\
806	/* must also be changed inside Coro::Cont::yield */ \
807	if (!SvOBJECT(sv) || SvSTASH(sv) != coro_state_stash) \
808	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
809	\
810	} while(0)
811		1097
812	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1098	if (coro->flags & CF_RUNNING)
		1099	croak ("FATAL: tried to destroy currently running coroutine");
813		1100
		1101	save_perl (aTHX_ &temp);
		1102	load_perl (aTHX_ coro);
		1103
		1104	coro_destroy (aTHX_ coro);
		1105
		1106	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1107
		1108	coro->mainstack = 0;
		1109	}
		1110
		1111	cctx_destroy (coro->cctx);
		1112	SvREFCNT_dec (coro->args);
		1113
		1114	if (coro->next) coro->next->prev = coro->prev;
		1115	if (coro->prev) coro->prev->next = coro->next;
		1116	if (coro == coro_first) coro_first = coro->next;
		1117
		1118	return 1;
		1119	}
		1120
814	static void	1121	static int
		1122	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1123	{
		1124	struct coro *coro = (struct coro *)mg->mg_ptr;
		1125	mg->mg_ptr = 0;
		1126
		1127	coro->hv = 0;
		1128
		1129	if (--coro->refcnt < 0)
		1130	{
		1131	coro_state_destroy (aTHX_ coro);
		1132	Safefree (coro);
		1133	}
		1134
		1135	return 0;
		1136	}
		1137
		1138	static int
		1139	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1140	{
		1141	struct coro *coro = (struct coro *)mg->mg_ptr;
		1142
		1143	++coro->refcnt;
		1144
		1145	return 0;
		1146	}
		1147
		1148	static MGVTBL coro_state_vtbl = {
		1149	0, 0, 0, 0,
		1150	coro_state_free,
		1151	0,
		1152	#ifdef MGf_DUP
		1153	coro_state_dup,
		1154	#else
		1155	# define MGf_DUP 0
		1156	#endif
		1157	};
		1158
		1159	static void
		1160	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1161	{
		1162	ta->prev = SvSTATE (prev_sv);
		1163	ta->next = SvSTATE (next_sv);
		1164	TRANSFER_CHECK (*ta);
		1165	}
		1166
		1167	static void
815	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1168	api_transfer (SV *prev_sv, SV *next_sv)
816	{	1169	{
817	SV_CORO (prev, "Coro::transfer");	1170	dTHX;
818	SV_CORO (next, "Coro::transfer");	1171	struct transfer_args ta;
819		1172
820	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	1173	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1174	TRANSFER (ta);
821	}	1175	}
822		1176
823	/** Coro ********************************************************************/	1177	/** Coro ********************************************************************/
824		1178
825	#define PRIO_MAX 3
826	#define PRIO_HIGH 1
827	#define PRIO_NORMAL 0
828	#define PRIO_LOW -1
829	#define PRIO_IDLE -3
830	#define PRIO_MIN -4
831
832	/* for Coro.pm */
833	static GV *coro_current, *coro_idle;
834	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
835	static int coro_nready;
836
837	static void	1179	static void
838	coro_enq (SV *sv)	1180	coro_enq (pTHX_ SV *coro_sv)
839	{	1181	{
840	if (SvTYPE (sv) == SVt_PVHV)
841	{
842	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
843	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
844
845	prio = prio > PRIO_MAX ? PRIO_MAX
846	: prio < PRIO_MIN ? PRIO_MIN
847	: prio;
848
849	av_push (coro_ready [prio - PRIO_MIN], sv);	1182	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
850	coro_nready++;
851
852	return;
853	}
854
855	croak ("Coro::ready tried to enqueue something that is not a coroutine");
856	}	1183	}
857		1184
858	static SV *	1185	static SV *
859	coro_deq (int min_prio)	1186	coro_deq (pTHX_ int min_prio)
860	{	1187	{
861	int prio = PRIO_MAX - PRIO_MIN;	1188	int prio = PRIO_MAX - PRIO_MIN;
862		1189
863	min_prio -= PRIO_MIN;	1190	min_prio -= PRIO_MIN;
864	if (min_prio < 0)	1191	if (min_prio < 0)
865	min_prio = 0;	1192	min_prio = 0;
866		1193
867	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1194	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
868	if (av_len (coro_ready[prio]) >= 0)	1195	if (AvFILLp (coro_ready [prio]) >= 0)
869	{
870	coro_nready--;
871	return av_shift (coro_ready[prio]);	1196	return av_shift (coro_ready [prio]);
872	}
873		1197
874	return 0;	1198	return 0;
875	}	1199	}
876		1200
877	static void	1201	static int
878	api_ready (SV *coro)	1202	api_ready (SV *coro_sv)
879	{	1203	{
		1204	dTHX;
		1205	struct coro *coro;
		1206
880	if (SvROK (coro))	1207	if (SvROK (coro_sv))
881	coro = SvRV (coro);	1208	coro_sv = SvRV (coro_sv);
882		1209
		1210	coro = SvSTATE (coro_sv);
		1211
		1212	if (coro->flags & CF_READY)
		1213	return 0;
		1214
		1215	coro->flags |= CF_READY;
		1216
		1217	LOCK;
883	coro_enq (SvREFCNT_inc (coro));	1218	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1219	++coro_nready;
		1220	UNLOCK;
		1221
		1222	return 1;
		1223	}
		1224
		1225	static int
		1226	api_is_ready (SV *coro_sv)
		1227	{
		1228	dTHX;
		1229	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1230	}
		1231
		1232	static void
		1233	prepare_schedule (pTHX_ struct transfer_args *ta)
		1234	{
		1235	SV *prev_sv, *next_sv;
		1236
		1237	for (;;)
		1238	{
		1239	LOCK;
		1240	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1241
		1242	/* nothing to schedule: call the idle handler */
		1243	if (!next_sv)
		1244	{
		1245	dSP;
		1246	UNLOCK;
		1247
		1248	ENTER;
		1249	SAVETMPS;
		1250
		1251	PUSHMARK (SP);
		1252	PUTBACK;
		1253	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1254
		1255	FREETMPS;
		1256	LEAVE;
		1257	continue;
		1258	}
		1259
		1260	ta->next = SvSTATE (next_sv);
		1261
		1262	/* cannot transfer to destroyed coros, skip and look for next */
		1263	if (ta->next->flags & CF_DESTROYED)
		1264	{
		1265	UNLOCK;
		1266	SvREFCNT_dec (next_sv);
		1267	/* coro_nready is already taken care of by destroy */
		1268	continue;
		1269	}
		1270
		1271	--coro_nready;
		1272	UNLOCK;
		1273	break;
		1274	}
		1275
		1276	/* free this only after the transfer */
		1277	prev_sv = SvRV (coro_current);
		1278	ta->prev = SvSTATE (prev_sv);
		1279	TRANSFER_CHECK (*ta);
		1280	assert (ta->next->flags & CF_READY);
		1281	ta->next->flags &= ~CF_READY;
		1282	SvRV_set (coro_current, next_sv);
		1283
		1284	LOCK;
		1285	free_coro_mortal (aTHX);
		1286	coro_mortal = prev_sv;
		1287	UNLOCK;
		1288	}
		1289
		1290	static void
		1291	prepare_cede (pTHX_ struct transfer_args *ta)
		1292	{
		1293	api_ready (coro_current);
		1294	prepare_schedule (aTHX_ ta);
		1295	}
		1296
		1297	static int
		1298	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1299	{
		1300	if (coro_nready)
		1301	{
		1302	SV *prev = SvRV (coro_current);
		1303	prepare_schedule (aTHX_ ta);
		1304	api_ready (prev);
		1305	return 1;
		1306	}
		1307	else
		1308	return 0;
884	}	1309	}
885		1310
886	static void	1311	static void
887	api_schedule (void)	1312	api_schedule (void)
888	{	1313	{
889	SV *prev, *next;	1314	dTHX;
		1315	struct transfer_args ta;
890		1316
891	prev = SvRV (GvSV (coro_current));	1317	prepare_schedule (aTHX_ &ta);
892	next = coro_deq (PRIO_MIN);	1318	TRANSFER (ta);
893
894	if (!next)
895	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
896
897	/* free this only after the transfer */
898	coro_mortal = prev;
899	SV_CORO (prev, "Coro::schedule");
900
901	SvRV (GvSV (coro_current)) = next;
902
903	SV_CORO (next, "Coro::schedule");
904
905	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
906	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
907	}	1319	}
908		1320
909	static void	1321	static int
910	api_cede (void)	1322	api_cede (void)
911	{	1323	{
912	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1324	dTHX;
		1325	struct transfer_args ta;
913		1326
914	api_schedule ();	1327	prepare_cede (aTHX_ &ta);
915	}
916		1328
		1329	if (ta.prev != ta.next)
		1330	{
		1331	TRANSFER (ta);
		1332	return 1;
		1333	}
		1334	else
		1335	return 0;
		1336	}
		1337
		1338	static int
		1339	api_cede_notself (void)
		1340	{
		1341	dTHX;
		1342	struct transfer_args ta;
		1343
		1344	if (prepare_cede_notself (aTHX_ &ta))
		1345	{
		1346	TRANSFER (ta);
		1347	return 1;
		1348	}
		1349	else
		1350	return 0;
		1351	}
		1352
		1353	static void
		1354	api_trace (SV *coro_sv, int flags)
		1355	{
		1356	dTHX;
		1357	struct coro *coro = SvSTATE (coro_sv);
		1358
		1359	if (flags & CC_TRACE)
		1360	{
		1361	if (!coro->cctx)
		1362	coro->cctx = cctx_new ();
		1363	else if (!(coro->cctx->flags & CC_TRACE))
		1364	croak ("cannot enable tracing on coroutine with custom stack");
		1365
		1366	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1367	}
		1368	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1369	{
		1370	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1371
		1372	if (coro->flags & CF_RUNNING)
		1373	PL_runops = RUNOPS_DEFAULT;
		1374	else
		1375	coro->runops = RUNOPS_DEFAULT;
		1376	}
		1377	}
		1378
917	MODULE = Coro::State PACKAGE = Coro::State	1379	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
918		1380
919	PROTOTYPES: ENABLE	1381	PROTOTYPES: DISABLE
920		1382
921	BOOT:	1383	BOOT:
922	{ /* {} necessary for stoopid perl-5.6.x */	1384	{
923	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1385	#ifdef USE_ITHREADS
924	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1386	MUTEX_INIT (&coro_mutex);
		1387	#endif
		1388	BOOT_PAGESIZE;
		1389
		1390	irsgv = gv_fetchpv ("/", 1, SVt_PV);
		1391
925	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1392	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
926		1393
927	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1394	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
928	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1395	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
929	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1396	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
930	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1397	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
931
932	if (!padlist_cache)
933	padlist_cache = newHV ();
934		1398
935	main_mainstack = PL_mainstack;	1399	main_mainstack = PL_mainstack;
		1400	main_top_env = PL_top_env;
		1401
		1402	while (main_top_env->je_prev)
		1403	main_top_env = main_top_env->je_prev;
936		1404
937	coroapi.ver = CORO_API_VERSION;	1405	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1406	coroapi.transfer = api_transfer;
939	}
940		1407
941	Coro::State	1408	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1409	}
943	SV * args	1410
944	PROTOTYPE: $	1411	SV *
		1412	new (char *klass, ...)
945	CODE:	1413	CODE:
946	Coro__State coro;	1414	{
		1415	struct coro *coro;
		1416	HV *hv;
		1417	int i;
947		1418
948	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
949	croak ("Coro::State::_newprocess expects an arrayref");
950
951	Newz (0, coro, 1, struct coro);	1419	Newz (0, coro, 1, struct coro);
		1420	coro->args = newAV ();
		1421	coro->flags = CF_NEW;
952		1422
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1423	if (coro_first) coro_first->prev = coro;
954	coro->mainstack = 0; /* actual work is done inside transfer */	1424	coro->next = coro_first;
955	coro->stack = 0;	1425	coro_first = coro;
956		1426
957	/* same as JMPENV_BOOTSTRAP */	1427	coro->hv = hv = newHV ();
958	/* we might be able to recycle start_env, but safe is safe */	1428	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
959	//Zero(&coro->start_env, 1, JMPENV);	1429	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
960	coro->start_env.je_ret = -1;
961	coro->start_env.je_mustcatch = TRUE;
962		1430
963	RETVAL = coro;	1431	for (i = 1; i < items; i++)
		1432	av_push (coro->args, newSVsv (ST (i)));
		1433	}
964	OUTPUT:	1434	OUTPUT:
965	RETVAL	1435	RETVAL
966		1436
		1437	# these not obviously related functions are all rolled into the same xs
		1438	# function to increase chances that they all will call transfer with the same
		1439	# stack offset
967	void	1440	void
968	transfer(prev, next, flags)	1441	_set_stacklevel (...)
969	SV *prev	1442	ALIAS:
970	SV *next	1443	Coro::State::transfer = 1
971	int flags	1444	Coro::schedule = 2
972	PROTOTYPE: @	1445	Coro::cede = 3
		1446	Coro::cede_notself = 4
973	CODE:	1447	CODE:
974	PUTBACK;	1448	{
975	SV_CORO (next, "Coro::transfer");	1449	struct transfer_args ta;
976	SV_CORO (prev, "Coro::transfer");	1450
977	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1451	switch (ix)
978	SPAGAIN;	1452	{
		1453	case 0:
		1454	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1455	ta.next = 0;
		1456	break;
		1457
		1458	case 1:
		1459	if (items != 2)
		1460	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1461
		1462	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1463	break;
		1464
		1465	case 2:
		1466	prepare_schedule (aTHX_ &ta);
		1467	break;
		1468
		1469	case 3:
		1470	prepare_cede (aTHX_ &ta);
		1471	break;
		1472
		1473	case 4:
		1474	if (!prepare_cede_notself (aTHX_ &ta))
		1475	XSRETURN_EMPTY;
		1476
		1477	break;
		1478	}
		1479
		1480	BARRIER;
		1481	TRANSFER (ta);
		1482
		1483	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1484	XSRETURN_YES;
		1485	}
		1486
		1487	bool
		1488	_destroy (SV *coro_sv)
		1489	CODE:
		1490	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1491	OUTPUT:
		1492	RETVAL
979		1493
980	void	1494	void
981	DESTROY(coro)
982	Coro::State coro
983	CODE:
984
985	if (coro->mainstack && coro->mainstack != main_mainstack)
986	{
987	struct coro temp;
988
989	PUTBACK;
990	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
991	LOAD(aTHX_ coro);
992	SPAGAIN;
993
994	destroy_stacks (aTHX);
995
996	LOAD((&temp)); /* this will get rid of defsv etc.. */
997	SPAGAIN;
998
999	coro->mainstack = 0;
1000	}
1001
1002	deallocate_stack (coro);
1003	SvREFCNT_dec (coro->args);
1004	Safefree (coro);
1005
1006	void
1007	_exit(code)	1495	_exit (code)
1008	int code	1496	int code
1009	PROTOTYPE: $	1497	PROTOTYPE: $
1010	CODE:	1498	CODE:
1011	#if defined(__GLIBC__) || _POSIX_C_SOURCE
1012	_exit (code);	1499	_exit (code);
1013	#else
1014	signal (SIGTERM, SIG_DFL);
1015	raise (SIGTERM);
1016	exit (code);
1017	#endif
1018		1500
1019	MODULE = Coro::State PACKAGE = Coro::Cont	1501	int
		1502	cctx_stacksize (int new_stacksize = 0)
		1503	CODE:
		1504	RETVAL = coro_stacksize;
		1505	if (new_stacksize)
		1506	coro_stacksize = new_stacksize;
		1507	OUTPUT:
		1508	RETVAL
1020		1509
1021	# this is slightly dirty (should expose a c-level api)	1510	int
		1511	cctx_count ()
		1512	CODE:
		1513	RETVAL = cctx_count;
		1514	OUTPUT:
		1515	RETVAL
		1516
		1517	int
		1518	cctx_idle ()
		1519	CODE:
		1520	RETVAL = cctx_idle;
		1521	OUTPUT:
		1522	RETVAL
1022		1523
1023	void	1524	void
1024	yield(...)	1525	list ()
1025	PROTOTYPE: @	1526	PPCODE:
		1527	{
		1528	struct coro *coro;
		1529	for (coro = coro_first; coro; coro = coro->next)
		1530	if (coro->hv)
		1531	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1532	}
		1533
		1534	void
		1535	call (Coro::State coro, SV *coderef)
		1536	ALIAS:
		1537	eval = 1
		1538	CODE:
		1539	{
		1540	if (coro->mainstack)
		1541	{
		1542	struct coro temp;
		1543	Zero (&temp, 1, struct coro);
		1544
		1545	if (!(coro->flags & CF_RUNNING))
		1546	{
		1547	save_perl (aTHX_ &temp);
		1548	load_perl (aTHX_ coro);
		1549	}
		1550
		1551	{
		1552	dSP;
		1553	ENTER;
		1554	SAVETMPS;
		1555	PUSHMARK (SP);
		1556	PUTBACK;
		1557	if (ix)
		1558	eval_sv (coderef, 0);
		1559	else
		1560	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1561	SPAGAIN;
		1562	FREETMPS;
		1563	LEAVE;
		1564	PUTBACK;
		1565	}
		1566
		1567	if (!(coro->flags & CF_RUNNING))
		1568	{
		1569	save_perl (aTHX_ coro);
		1570	load_perl (aTHX_ &temp);
		1571	}
		1572	}
		1573	}
		1574
		1575	SV *
		1576	is_ready (Coro::State coro)
		1577	PROTOTYPE: $
		1578	ALIAS:
		1579	is_ready = CF_READY
		1580	is_running = CF_RUNNING
		1581	is_new = CF_NEW
		1582	is_destroyed = CF_DESTROYED
		1583	CODE:
		1584	RETVAL = boolSV (coro->flags & ix);
		1585	OUTPUT:
		1586	RETVAL
		1587
		1588	void
		1589	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1590
		1591	SV *
		1592	has_stack (Coro::State coro)
		1593	PROTOTYPE: $
		1594	CODE:
		1595	RETVAL = boolSV (!!coro->cctx);
		1596	OUTPUT:
		1597	RETVAL
		1598
		1599	int
		1600	is_traced (Coro::State coro)
		1601	PROTOTYPE: $
		1602	CODE:
		1603	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1604	OUTPUT:
		1605	RETVAL
		1606
		1607	IV
		1608	rss (Coro::State coro)
		1609	PROTOTYPE: $
		1610	ALIAS:
		1611	usecount = 1
1026	CODE:	1612	CODE:
1027	static SV *returnstk;	1613	switch (ix)
1028	SV *sv;	1614	{
1029	AV *defav = GvAV (PL_defgv);	1615	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1030	struct coro *prev, *next;	1616	case 1: RETVAL = coro->usecount; break;
		1617	}
		1618	OUTPUT:
		1619	RETVAL
1031		1620
1032	if (!returnstk)
1033	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1034
1035	/* set up @_ -- ugly */
1036	av_clear (defav);
1037	av_fill (defav, items - 1);
1038	while (items--)
1039	av_store (defav, items, SvREFCNT_inc (ST(items)));
1040
1041	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1042	sv = av_pop ((AV *)SvRV (returnstk));
1043	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1044	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1045	SvREFCNT_dec (sv);
1046
1047	transfer(aTHX_ prev, next, 0);
1048		1621
1049	MODULE = Coro::State PACKAGE = Coro	1622	MODULE = Coro::State PACKAGE = Coro
1050		1623
1051	# this is slightly dirty (should expose a c-level api)
1052
1053	BOOT:	1624	BOOT:
1054	{	1625	{
1055	int i;	1626	int i;
		1627
		1628	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1629	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1630	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1631
		1632	coro_current = get_sv ("Coro::current", FALSE);
		1633	SvREADONLY_on (coro_current);
		1634
1056	HV *stash = gv_stashpv ("Coro", TRUE);	1635	coro_stash = gv_stashpv ("Coro", TRUE);
1057		1636
1058	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1637	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1059	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1638	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1060	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1639	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1061	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1640	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1062	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1641	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1063	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1642	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1064
1065	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1066	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1067		1643
1068	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1644	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1069	coro_ready[i] = newAV ();	1645	coro_ready[i] = newAV ();
1070		1646
1071	{	1647	{
1072	SV *sv = perl_get_sv("Coro::API", 1);	1648	SV *sv = perl_get_sv("Coro::API", 1);
1073		1649
1074	coroapi.schedule = api_schedule;	1650	coroapi.schedule = api_schedule;
1075	coroapi.cede = api_cede;	1651	coroapi.cede = api_cede;
		1652	coroapi.cede_notself = api_cede_notself;
1076	coroapi.ready = api_ready;	1653	coroapi.ready = api_ready;
		1654	coroapi.is_ready = api_is_ready;
1077	coroapi.nready = &coro_nready;	1655	coroapi.nready = &coro_nready;
1078	coroapi.current = coro_current;	1656	coroapi.current = coro_current;
1079		1657
1080	GCoroAPI = &coroapi;	1658	GCoroAPI = &coroapi;
1081	sv_setiv(sv, (IV)&coroapi);	1659	sv_setiv (sv, (IV)&coroapi);
1082	SvREADONLY_on(sv);	1660	SvREADONLY_on (sv);
1083	}	1661	}
1084	}	1662	}
1085		1663
1086	#if !PERL_MICRO
1087
1088	void	1664	void
1089	ready(self)	1665	_set_current (SV *current)
1090	SV * self
1091	PROTOTYPE: $	1666	PROTOTYPE: $
1092	CODE:	1667	CODE:
1093	api_ready (self);	1668	SvREFCNT_dec (SvRV (coro_current));
1094		1669	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1095	#endif
1096		1670
1097	int	1671	int
		1672	prio (Coro::State coro, int newprio = 0)
		1673	ALIAS:
		1674	nice = 1
		1675	CODE:
		1676	{
		1677	RETVAL = coro->prio;
		1678
		1679	if (items > 1)
		1680	{
		1681	if (ix)
		1682	newprio = coro->prio - newprio;
		1683
		1684	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1685	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1686
		1687	coro->prio = newprio;
		1688	}
		1689	}
		1690	OUTPUT:
		1691	RETVAL
		1692
		1693	SV *
		1694	ready (SV *self)
		1695	PROTOTYPE: $
		1696	CODE:
		1697	RETVAL = boolSV (api_ready (self));
		1698	OUTPUT:
		1699	RETVAL
		1700
		1701	int
1098	nready(...)	1702	nready (...)
1099	PROTOTYPE:	1703	PROTOTYPE:
1100	CODE:	1704	CODE:
1101	RETVAL = coro_nready;	1705	RETVAL = coro_nready;
1102	OUTPUT:	1706	OUTPUT:
1103	RETVAL	1707	RETVAL
1104		1708
		1709	# for async_pool speedup
1105	void	1710	void
1106	schedule(...)	1711	_pool_1 (SV *cb)
1107	PROTOTYPE:
1108	CODE:	1712	CODE:
1109	api_schedule ();	1713	{
		1714	struct coro *coro = SvSTATE (coro_current);
		1715	HV *hv = (HV *)SvRV (coro_current);
		1716	AV *defav = GvAV (PL_defgv);
		1717	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1718	AV *invoke_av;
		1719	int i, len;
		1720
		1721	if (!invoke)
		1722	croak ("\3terminate\2\n");
		1723
		1724	SvREFCNT_dec (coro->saved_deffh);
		1725	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1726
		1727	hv_store (hv, "desc", sizeof ("desc") - 1,
		1728	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1729
		1730	invoke_av = (AV *)SvRV (invoke);
		1731	len = av_len (invoke_av);
		1732
		1733	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1734
		1735	if (len > 0)
		1736	{
		1737	av_fill (defav, len - 1);
		1738	for (i = 0; i < len; ++i)
		1739	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1740	}
		1741
		1742	SvREFCNT_dec (invoke);
		1743	}
1110		1744
1111	void	1745	void
1112	cede(...)	1746	_pool_2 (SV *cb)
1113	PROTOTYPE:
1114	CODE:	1747	CODE:
1115	api_cede ();	1748	{
		1749	struct coro *coro = SvSTATE (coro_current);
1116		1750
		1751	sv_setsv (cb, &PL_sv_undef);
		1752
		1753	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1754	coro->saved_deffh = 0;
		1755
		1756	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1757	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1758	croak ("\3terminate\2\n");
		1759
		1760	av_clear (GvAV (PL_defgv));
		1761	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1762	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1763
		1764	coro->prio = 0;
		1765
		1766	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1767	api_trace (coro_current, 0);
		1768
		1769	av_push (av_async_pool, newSVsv (coro_current));
		1770	}
		1771
		1772
		1773	MODULE = Coro::State PACKAGE = Coro::AIO
		1774
		1775	SV *
		1776	_get_state ()
		1777	CODE:
		1778	{
		1779	struct io_state *data;
		1780
		1781	RETVAL = newSV (sizeof (struct io_state));
		1782	data = (struct io_state *)SvPVX (RETVAL);
		1783	SvCUR_set (RETVAL, sizeof (struct io_state));
		1784	SvPOK_only (RETVAL);
		1785
		1786	data->errorno = errno;
		1787	data->laststype = PL_laststype;
		1788	data->laststatval = PL_laststatval;
		1789	data->statcache = PL_statcache;
		1790	}
		1791	OUTPUT:
		1792	RETVAL
		1793
		1794	void
		1795	_set_state (char *data_)
		1796	PROTOTYPE: $
		1797	CODE:
		1798	{
		1799	struct io_state *data = (void *)data_;
		1800
		1801	errno = data->errorno;
		1802	PL_laststype = data->laststype;
		1803	PL_laststatval = data->laststatval;
		1804	PL_statcache = data->statcache;
		1805	}
		1806

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