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Comparing Coro/Coro/State.xs (file contents):
Revision 1.55 by pcg, Thu Apr 1 02:29:05 2004 UTC vs.
Revision 1.187 by root, Fri Oct 5 20:31:18 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
58	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
59	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
60	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
61	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
62	#else	116	#else
63	# define LOCK 0	117	# define LOCK (void)0
64	# define UNLOCK 0	118	# define UNLOCK (void)0
65	#endif	119	#endif
66		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;
67	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 */
68		136
69	/* 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 */
70	typedef struct {	157	typedef struct coro_cctx {
71	int refcnt; /* pointer reference counter */	158	struct coro_cctx *next;
72	int usecnt; /* shared by how many coroutines */
73	int gencnt; /* generation counter */
74		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;
75	coro_context cctx;	168	coro_context cctx;
76		169
77	void *sptr;	170	#if CORO_USE_VALGRIND
78	long ssize; /* positive == mmap, otherwise malloc */	171	int valgrind_id;
79	} coro_stack;	172	#endif
		173	unsigned char flags;
		174	} coro_cctx;
80		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 */
81	struct coro {	184	struct coro {
82	/* the top-level JMPENV for each coroutine, needed to catch dies. */	185	/* the c coroutine allocated to this perl coroutine, if any */
83	JMPENV start_env;	186	coro_cctx *cctx;
84
85	/* the optional C context */
86	coro_stack *stack;
87	void *cursp;
88	int gencnt;
89
90	/* optionally saved, might be zero */
91	AV *defav;
92	SV *defsv;
93	SV *errsv;
94
95	/* saved global state not related to stacks */
96	U8 dowarn;
97	I32 in_eval;
98
99	/* the stacks and related info (callchain etc..) */
100	PERL_SI *curstackinfo;
101	AV *curstack;
102	AV *mainstack;
103	SV **stack_sp;
104	OP *op;
105	SV **curpad;
106	AV *comppad;
107	SV **stack_base;
108	SV **stack_max;
109	SV **tmps_stack;
110	I32 tmps_floor;
111	I32 tmps_ix;
112	I32 tmps_max;
113	I32 *markstack;
114	I32 *markstack_ptr;
115	I32 *markstack_max;
116	I32 *scopestack;
117	I32 scopestack_ix;
118	I32 scopestack_max;
119	ANY *savestack;
120	I32 savestack_ix;
121	I32 savestack_max;
122	OP **retstack;
123	I32 retstack_ix;
124	I32 retstack_max;
125	COP *curcop;
126	JMPENV *top_env;
127		187
128	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
129	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 */
130	};	218	};
131		219
132	typedef struct coro *Coro__State;	220	typedef struct coro *Coro__State;
133	typedef struct coro *Coro__State_or_hashref;	221	typedef struct coro *Coro__State_or_hashref;
134		222
135	static AV *main_mainstack; /* used to differentiate between $main and others */	223	/** Coro ********************************************************************/
136	static HV *coro_state_stash;
137	static SV *ucoro_state_sv;
138	static U32 ucoro_state_hash;
139	static SV *coro_mortal; /* will be freed after next transfer */
140		224
141	/* mostly copied from op.c:cv_clone2 */	225	#define PRIO_MAX 3
142	STATIC AV *	226	#define PRIO_HIGH 1
143	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)
144	{	242	{
145	AV *av;	243	AV *padlist = CvPADLIST (cv);
146	I32 ix;
147	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
148	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
149	SV **pname = AvARRAY (protopad_name);
150	SV **ppad = AvARRAY (protopad);
151	I32 fname = AvFILLp (protopad_name);
152	I32 fpad = AvFILLp (protopad);
153	AV *newpadlist, *newpad_name, *newpad;	244	AV *newpadlist, *newpad;
154	SV **npad;
155
156	newpad_name = newAV ();
157	for (ix = fname; ix >= 0; ix--)
158	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
159
160	newpad = newAV ();
161	av_fill (newpad, AvFILLp (protopad));
162	npad = AvARRAY (newpad);
163		245
164	newpadlist = newAV ();	246	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	247	AvREAL_off (newpadlist);
166	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)));
167	av_store (newpadlist, 1, (SV *) newpad);	257	av_store (newpadlist, 1, (SV *)newpad);
168
169	av = newAV (); /* will be @_ */
170	av_extend (av, 0);
171	av_store (newpad, 0, (SV *) av);
172	AvFLAGS (av) = AVf_REIFY;
173
174	for (ix = fpad; ix > 0; ix--)
175	{
176	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
177
178	if (namesv && namesv != &PL_sv_undef)
179	{
180	char *name = SvPVX (namesv); /* XXX */
181
182	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
183	{ /* lexical from outside? */
184	npad[ix] = SvREFCNT_inc (ppad[ix]);
185	}
186	else
187	{ /* our own lexical */
188	SV *sv;
189	if (*name == '&')
190	sv = SvREFCNT_inc (ppad[ix]);
191	else if (*name == '@')
192	sv = (SV *) newAV ();
193	else if (*name == '%')
194	sv = (SV *) newHV ();
195	else
196	sv = NEWSV (0, 0);
197
198	#ifdef SvPADBUSY
199	if (!SvPADBUSY (sv))
200	#endif
201	SvPADMY_on (sv);
202
203	npad[ix] = sv;
204	}
205	}
206	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
207	{
208	npad[ix] = SvREFCNT_inc (ppad[ix]);
209	}
210	else
211	{
212	SV *sv = NEWSV (0, 0);
213	SvPADTMP_on (sv);
214	npad[ix] = sv;
215	}
216	}
217
218	#if 0 /* return -ENOTUNDERSTOOD */
219	/* Now that vars are all in place, clone nested closures. */
220
221	for (ix = fpad; ix > 0; ix--) {
222	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
223	if (namesv
224	&& namesv != &PL_sv_undef
225	&& !(SvFLAGS(namesv) & SVf_FAKE)
226	&& *SvPVX(namesv) == '&'
227	&& CvCLONE(ppad[ix]))
228	{
229	CV *kid = cv_clone((CV*)ppad[ix]);
230	SvREFCNT_dec(ppad[ix]);
231	CvCLONE_on(kid);
232	SvPADMY_on(kid);
233	npad[ix] = (SV*)kid;
234	}
235	}
236	#endif
237		258
238	return newpadlist;	259	return newpadlist;
239	}	260	}
240		261
241	STATIC void	262	static void
242	free_padlist (AV *padlist)	263	free_padlist (pTHX_ AV *padlist)
243	{	264	{
244	/* may be during global destruction */	265	/* may be during global destruction */
245	if (SvREFCNT (padlist))	266	if (SvREFCNT (padlist))
246	{	267	{
247	I32 i = AvFILLp (padlist);	268	I32 i = AvFILLp (padlist);
…		…
260		281
261	SvREFCNT_dec ((SV*)padlist);	282	SvREFCNT_dec ((SV*)padlist);
262	}	283	}
263	}	284	}
264		285
265	STATIC int	286	static int
266	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	287	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
267	{	288	{
268	AV *padlist;	289	AV *padlist;
269	AV *av = (AV *)mg->mg_obj;	290	AV *av = (AV *)mg->mg_obj;
270		291
271	/* casting is fun. */	292	/* casting is fun. */
272	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	293	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
273	free_padlist (padlist);	294	free_padlist (aTHX_ padlist);
		295
		296	SvREFCNT_dec (av);
		297
		298	return 0;
274	}	299	}
275		300
276	#define PERL_MAGIC_coro PERL_MAGIC_ext	301	#define PERL_MAGIC_coro PERL_MAGIC_ext
277		302
278	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	303	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
279		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
280	/* the next two functions merely cache the padlists */	338	/* the next two functions merely cache the padlists */
281	STATIC void	339	static void
282	get_padlist (CV *cv)	340	get_padlist (pTHX_ CV *cv)
283	{	341	{
284	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	342	MAGIC *mg = CORO_MAGIC (cv);
		343	AV *av;
285		344
286	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	345	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
287	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	346	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
288	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
289	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	356	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		357	#endif
		358	}
290	}	359	}
291		360
292	STATIC void	361	static void
293	put_padlist (CV *cv)	362	put_padlist (pTHX_ CV *cv)
294	{	363	{
295	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	364	MAGIC *mg = CORO_MAGIC (cv);
		365	AV *av;
296		366
297	if (!mg)	367	if (!mg)
298	{	368	{
299	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	369	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
300	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	370	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
301	mg->mg_virtual = &vtbl_coro;	371	mg->mg_virtual = &vtbl_coro;
302	mg->mg_obj = (SV *)newAV ();	372	mg->mg_obj = (SV *)newAV ();
303	}	373	}
304		374
305	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	375	av = (AV *)mg->mg_obj;
306	}
307		376
308	#define SB do {	377	if (AvFILLp (av) >= AvMAX (av))
309	#define SE } while (0)	378	av_extend (av, AvMAX (av) + 1);
310		379
311	#define LOAD(state) load_state(aTHX_ (state));	380	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
312	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	381	}
313		382
314	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	383	/** load & save, init *******************************************************/
315		384
316	static void	385	static void
317	load_state(pTHX_ Coro__State c)	386	load_perl (pTHX_ Coro__State c)
318	{	387	{
319	PL_dowarn = c->dowarn;	388	#define VAR(name,type) PL_ ## name = c->name;
320	PL_in_eval = c->in_eval;	389	# include "state.h"
		390	#undef VAR
321		391
322	PL_curstackinfo = c->curstackinfo;	392	GvSV (PL_defgv) = c->defsv;
323	PL_curstack = c->curstack;	393	GvAV (PL_defgv) = c->defav;
324	PL_mainstack = c->mainstack;	394	GvSV (PL_errgv) = c->errsv;
325	PL_stack_sp = c->stack_sp;	395	GvSV (irsgv) = c->irssv_sv;
326	PL_op = c->op;
327	PL_curpad = c->curpad;
328	PL_comppad = c->comppad;
329	PL_stack_base = c->stack_base;
330	PL_stack_max = c->stack_max;
331	PL_tmps_stack = c->tmps_stack;
332	PL_tmps_floor = c->tmps_floor;
333	PL_tmps_ix = c->tmps_ix;
334	PL_tmps_max = c->tmps_max;
335	PL_markstack = c->markstack;
336	PL_markstack_ptr = c->markstack_ptr;
337	PL_markstack_max = c->markstack_max;
338	PL_scopestack = c->scopestack;
339	PL_scopestack_ix = c->scopestack_ix;
340	PL_scopestack_max = c->scopestack_max;
341	PL_savestack = c->savestack;
342	PL_savestack_ix = c->savestack_ix;
343	PL_savestack_max = c->savestack_max;
344	PL_retstack = c->retstack;
345	PL_retstack_ix = c->retstack_ix;
346	PL_retstack_max = c->retstack_max;
347	PL_curcop = c->curcop;
348	PL_top_env = c->top_env;
349
350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
352	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
353		396
354	{	397	{
355	dSP;	398	dSP;
356	CV *cv;	399	CV *cv;
357		400
358	/* now do the ugly restore mess */	401	/* now do the ugly restore mess */
359	while ((cv = (CV *)POPs))	402	while ((cv = (CV *)POPs))
360	{	403	{
361	AV *padlist = (AV *)POPs;
362
363	if (padlist)
364	{
365	put_padlist (cv); /* mark this padlist as available */	404	put_padlist (aTHX_ cv); /* mark this padlist as available */
366	CvPADLIST(cv) = padlist;	405	CvDEPTH (cv) = PTR2IV (POPs);
367	}	406	CvPADLIST (cv) = (AV *)POPs;
368
369	++CvDEPTH(cv);
370	}	407	}
371		408
372	PUTBACK;	409	PUTBACK;
373	}	410	}
374	}	411	}
375		412
376	static void	413	static void
377	save_state(pTHX_ Coro__State c, int flags)	414	save_perl (pTHX_ Coro__State c)
378	{	415	{
379	{	416	{
380	dSP;	417	dSP;
381	I32 cxix = cxstack_ix;	418	I32 cxix = cxstack_ix;
382	PERL_CONTEXT *ccstk = cxstack;	419	PERL_CONTEXT *ccstk = cxstack;
…		…
385	/*	422	/*
386	* 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
387	* (and reinitialize) all cv's in the whole callchain :(	424	* (and reinitialize) all cv's in the whole callchain :(
388	*/	425	*/
389		426
390	PUSHs (Nullsv);	427	XPUSHs (Nullsv);
391	/* this loop was inspired by pp_caller */	428	/* this loop was inspired by pp_caller */
392	for (;;)	429	for (;;)
393	{	430	{
394	while (cxix >= 0)	431	while (cxix >= 0)
395	{	432	{
396	PERL_CONTEXT *cx = &ccstk[cxix--];	433	PERL_CONTEXT *cx = &ccstk[cxix--];
397		434
398	if (CxTYPE(cx) == CXt_SUB)	435	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
399	{	436	{
400	CV *cv = cx->blk_sub.cv;	437	CV *cv = cx->blk_sub.cv;
		438
401	if (CvDEPTH(cv))	439	if (CvDEPTH (cv))
402	{	440	{
403	EXTEND (SP, CvDEPTH(cv)*2);	441	EXTEND (SP, 3);
404
405	while (--CvDEPTH(cv))
406	{
407	/* this tells the restore code to increment CvDEPTH */
408	PUSHs (Nullsv);
409	PUSHs ((SV *)cv);
410	}
411
412	PUSHs ((SV *)CvPADLIST(cv));	442	PUSHs ((SV *)CvPADLIST (cv));
		443	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
413	PUSHs ((SV *)cv);	444	PUSHs ((SV *)cv);
414		445
415	get_padlist (cv); /* this is a monster */	446	CvDEPTH (cv) = 0;
		447	get_padlist (aTHX_ cv);
416	}	448	}
417	}	449	}
418	#ifdef CXt_FORMAT
419	else if (CxTYPE(cx) == CXt_FORMAT)
420	{
421	/* I never used formats, so how should I know how these are implemented? */
422	/* my bold guess is as a simple, plain sub... */
423	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
424	}
425	#endif
426	}	450	}
427		451
428	if (top_si->si_type == PERLSI_MAIN)	452	if (top_si->si_type == PERLSI_MAIN)
429	break;	453	break;
430		454
431	top_si = top_si->si_prev;	455	top_si = top_si->si_prev;
432	ccstk = top_si->si_cxstack;	456	ccstk = top_si->si_cxstack;
433	cxix = top_si->si_cxix;	457	cxix = top_si->si_cxix;
434	}	458	}
435		459
436	PUTBACK;	460	PUTBACK;
437	}	461	}
438		462
439	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	463	c->defav = GvAV (PL_defgv);
440	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	464	c->defsv = DEFSV;
441	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	465	c->errsv = ERRSV;
		466	c->irssv_sv = GvSV (irsgv);
442		467
443	c->dowarn = PL_dowarn;	468	#define VAR(name,type)c->name = PL_ ## name;
444	c->in_eval = PL_in_eval;	469	# include "state.h"
445		470	#undef VAR
446	c->curstackinfo = PL_curstackinfo;
447	c->curstack = PL_curstack;
448	c->mainstack = PL_mainstack;
449	c->stack_sp = PL_stack_sp;
450	c->op = PL_op;
451	c->curpad = PL_curpad;
452	c->comppad = PL_comppad;
453	c->stack_base = PL_stack_base;
454	c->stack_max = PL_stack_max;
455	c->tmps_stack = PL_tmps_stack;
456	c->tmps_floor = PL_tmps_floor;
457	c->tmps_ix = PL_tmps_ix;
458	c->tmps_max = PL_tmps_max;
459	c->markstack = PL_markstack;
460	c->markstack_ptr = PL_markstack_ptr;
461	c->markstack_max = PL_markstack_max;
462	c->scopestack = PL_scopestack;
463	c->scopestack_ix = PL_scopestack_ix;
464	c->scopestack_max = PL_scopestack_max;
465	c->savestack = PL_savestack;
466	c->savestack_ix = PL_savestack_ix;
467	c->savestack_max = PL_savestack_max;
468	c->retstack = PL_retstack;
469	c->retstack_ix = PL_retstack_ix;
470	c->retstack_max = PL_retstack_max;
471	c->curcop = PL_curcop;
472	c->top_env = PL_top_env;
473	}	471	}
474		472
475	/*	473	/*
476	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
477	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
478	* on the (sometimes correct) assumption that coroutines do	476	* on the (sometimes correct) assumption that coroutines do
479	* not usually need a lot of stackspace.	477	* not usually need a lot of stackspace.
480	*/	478	*/
481	STATIC void	479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
		482	static void
482	coro_init_stacks (pTHX)	483	coro_init_stacks (pTHX)
483	{	484	{
484	LOCK;	485	PL_curstackinfo = new_stackinfo(64, 6);
485
486	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
487	PL_curstackinfo->si_type = PERLSI_MAIN;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
488	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
490		489
491	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
492	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
494		493
495	New(50,PL_tmps_stack,96,SV*);	494	New(50,PL_tmps_stack,64,SV*);
496	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
497	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
498	PL_tmps_max = 96;	497	PL_tmps_max = 64;
499		498
500	New(54,PL_markstack,16,I32);	499	New(54,PL_markstack,16,I32);
501	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
502	PL_markstack_max = PL_markstack + 16;	501	PL_markstack_max = PL_markstack + 16;
503		502
…		…
507		506
508	New(54,PL_scopestack,16,I32);	507	New(54,PL_scopestack,16,I32);
509	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
510	PL_scopestack_max = 16;	509	PL_scopestack_max = 16;
511		510
512	New(54,PL_savestack,96,ANY);	511	New(54,PL_savestack,64,ANY);
513	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
514	PL_savestack_max = 96;	513	PL_savestack_max = 64;
515		514
		515	#if !PERL_VERSION_ATLEAST (5,9,0)
516	New(54,PL_retstack,8,OP*);	516	New(54,PL_retstack,4,OP*);
517	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
518	PL_retstack_max = 8;	518	PL_retstack_max = 4;
519		519	#endif
520	UNLOCK;
521	}	520	}
		521	#endif
522		522
523	/*	523	/*
524	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
525	*/	525	*/
526	STATIC void	526	static void
527	destroy_stacks(pTHX)	527	coro_destroy_stacks (pTHX)
528	{	528	{
529	if (!IN_DESTRUCT)
530	{
531	/* is this ugly, I ask? */
532	LEAVE_SCOPE (0);
533
534	/* sure it is, but more important: is it correct?? :/ */
535	FREETMPS;
536	}
537
538	while (PL_curstackinfo->si_next)	529	while (PL_curstackinfo->si_next)
539	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
540		531
541	while (PL_curstackinfo)	532	while (PL_curstackinfo)
542	{	533	{
543	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
544		535
545	{
546	dSP;
547	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
548	PUTBACK; /* possibly superfluous */
549	}
550
551	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
552	{
553	dounwind(-1);
554	SvREFCNT_dec(PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
555	}
556		538
557	Safefree(PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
558	Safefree(PL_curstackinfo);	540	Safefree (PL_curstackinfo);
559	PL_curstackinfo = p;	541	PL_curstackinfo = p;
560	}	542	}
561		543
562	Safefree(PL_tmps_stack);	544	Safefree (PL_tmps_stack);
563	Safefree(PL_markstack);	545	Safefree (PL_markstack);
564	Safefree(PL_scopestack);	546	Safefree (PL_scopestack);
565	Safefree(PL_savestack);	547	Safefree (PL_savestack);
		548	#if !PERL_VERSION_ATLEAST (5,9,0)
566	Safefree(PL_retstack);	549	Safefree (PL_retstack);
567	}
568
569	static void
570	allocate_stack (Coro__State ctx, int alloc)
571	{
572	coro_stack *stack;
573
574	New (0, stack, 1, coro_stack);
575
576	stack->refcnt = 1;
577	stack->usecnt = 1;
578	stack->gencnt = ctx->gencnt = 0;
579
580	if (alloc)
581	{
582	#if HAVE_MMAP
583	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
584	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
585	if (stack->sptr == (void *)-1)
586	#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)
587	{	561	{
588	/*FIXME*//*D*//* reasonable stack size! */	562	#define VAR(name,type)coro->name = PL_ ## name;
589	stack->ssize = - (8192 * sizeof (long));	563	# include "state.h"
590	New (0, stack->sptr, 8192, long);	564	#undef VAR
591	}	565	}
592	}
593	else
594	stack->sptr = 0;
595		566
596	ctx->stack = stack;	567	rss += sizeof (coro->curstackinfo);
597	}	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);
598		575
599	static void	576	#if !PERL_VERSION_ATLEAST (5,9,0)
600	deallocate_stack (Coro__State ctx)	577	rss += coro->retstack_max * sizeof (OP *);
601	{	578	#endif
602	coro_stack *stack = ctx->stack;
603
604	ctx->stack = 0;
605
606	if (stack)
607	{	579	}
608	if (!--stack->refcnt)
609	{
610	#ifdef HAVE_MMAP
611	if (stack->ssize > 0 && stack->sptr)
612	munmap (stack->sptr, stack->ssize);
613	else
614	#endif
615	Safefree (stack->sptr);
616		580
617	Safefree (stack);	581	return rss;
618	}
619	else if (ctx->gencnt == stack->gencnt)
620	--stack->usecnt;
621	}
622	}	582	}
623		583
		584	/** coroutine stack handling ************************************************/
		585
624	static void	586	static void
625	setup_coro (void *arg)	587	coro_setup (pTHX_ struct coro *coro)
626	{	588	{
627	/*	589	/*
628	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
629	*/	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	SvREFCNT_inc (PL_defoutgv);
		610
		611	{
		612	dSP;
		613	LOGOP myop;
		614
		615	Zero (&myop, 1, LOGOP);
		616	myop.op_next = Nullop;
		617	myop.op_flags = OPf_WANT_VOID;
		618
		619	PUSHMARK (SP);
		620	XPUSHs (av_shift (GvAV (PL_defgv)));
		621	PUTBACK;
		622	PL_op = (OP *)&myop;
		623	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		624	SPAGAIN;
		625	}
		626
		627	ENTER; /* necessary e.g. for dounwind */
		628	}
		629
		630	static void
		631	coro_destroy (pTHX_ struct coro *coro)
		632	{
		633	if (!IN_DESTRUCT)
		634	{
		635	/* restore all saved variables and stuff */
		636	LEAVE_SCOPE (0);
		637	assert (PL_tmps_floor == -1);
		638
		639	/* free all temporaries */
		640	FREETMPS;
		641	assert (PL_tmps_ix == -1);
		642
		643	/* unwind all extra stacks */
		644	POPSTACK_TO (PL_mainstack);
		645
		646	/* unwind main stack */
		647	dounwind (-1);
		648	}
		649
		650	SvREFCNT_dec (GvSV (PL_defgv));
		651	SvREFCNT_dec (GvAV (PL_defgv));
		652	SvREFCNT_dec (GvSV (PL_errgv));
		653	SvREFCNT_dec (PL_defoutgv);
		654	SvREFCNT_dec (PL_rs);
		655	SvREFCNT_dec (GvSV (irsgv));
		656
		657	SvREFCNT_dec (coro->saved_deffh);
		658	//SvREFCNT_dec (coro->throw);
		659
		660	coro_destroy_stacks (aTHX);
		661	}
		662
		663	static void
		664	free_coro_mortal (pTHX)
		665	{
		666	if (coro_mortal)
		667	{
		668	SvREFCNT_dec (coro_mortal);
		669	coro_mortal = 0;
		670	}
		671	}
		672
		673	static int
		674	runops_trace (pTHX)
		675	{
		676	COP *oldcop = 0;
		677	int oldcxix = -2;
		678	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		679	coro_cctx *cctx = coro->cctx;
		680
		681	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		682	{
		683	PERL_ASYNC_CHECK ();
		684
		685	if (cctx->flags & CC_TRACE_ALL)
		686	{
		687	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		688	{
		689	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		690	SV **bot, **top;
		691	AV *av = newAV (); /* return values */
		692	SV **cb;
		693	dSP;
		694
		695	GV *gv = CvGV (cx->blk_sub.cv);
		696	SV *fullname = sv_2mortal (newSV (0));
		697	if (isGV (gv))
		698	gv_efullname3 (fullname, gv, 0);
		699
		700	bot = PL_stack_base + cx->blk_oldsp + 1;
		701	top = cx->blk_gimme == G_ARRAY ? SP + 1
		702	: cx->blk_gimme == G_SCALAR ? bot + 1
		703	: bot;
		704
		705	while (bot < top)
		706	av_push (av, SvREFCNT_inc (*bot++));
		707
		708	PL_runops = RUNOPS_DEFAULT;
		709	ENTER;
		710	SAVETMPS;
		711	EXTEND (SP, 3);
		712	PUSHMARK (SP);
		713	PUSHs (&PL_sv_no);
		714	PUSHs (fullname);
		715	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		716	PUTBACK;
		717	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		718	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		719	SPAGAIN;
		720	FREETMPS;
		721	LEAVE;
		722	PL_runops = runops_trace;
		723	}
		724
		725	if (oldcop != PL_curcop)
		726	{
		727	oldcop = PL_curcop;
		728
		729	if (PL_curcop != &PL_compiling)
		730	{
		731	SV **cb;
		732
		733	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		734	{
		735	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		736
		737	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		738	{
		739	runops_proc_t old_runops = PL_runops;
		740	dSP;
		741	GV *gv = CvGV (cx->blk_sub.cv);
		742	SV *fullname = sv_2mortal (newSV (0));
		743
		744	if (isGV (gv))
		745	gv_efullname3 (fullname, gv, 0);
		746
		747	PL_runops = RUNOPS_DEFAULT;
		748	ENTER;
		749	SAVETMPS;
		750	EXTEND (SP, 3);
		751	PUSHMARK (SP);
		752	PUSHs (&PL_sv_yes);
		753	PUSHs (fullname);
		754	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		755	PUTBACK;
		756	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		757	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		758	SPAGAIN;
		759	FREETMPS;
		760	LEAVE;
		761	PL_runops = runops_trace;
		762	}
		763
		764	oldcxix = cxstack_ix;
		765	}
		766
		767	if (cctx->flags & CC_TRACE_LINE)
		768	{
		769	dSP;
		770
		771	PL_runops = RUNOPS_DEFAULT;
		772	ENTER;
		773	SAVETMPS;
		774	EXTEND (SP, 3);
		775	PL_runops = RUNOPS_DEFAULT;
		776	PUSHMARK (SP);
		777	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		778	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		779	PUTBACK;
		780	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		781	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		782	SPAGAIN;
		783	FREETMPS;
		784	LEAVE;
		785	PL_runops = runops_trace;
		786	}
		787	}
		788	}
		789	}
		790	}
		791
		792	TAINT_NOT;
		793	return 0;
		794	}
		795
		796	/* inject a fake call to Coro::State::_cctx_init into the execution */
		797	/* _cctx_init should be careful, as it could be called at almost any time */
		798	/* during execution of a perl program */
		799	static void NOINLINE
		800	prepare_cctx (pTHX_ coro_cctx *cctx)
		801	{
630	dSP;	802	dSP;
631	Coro__State ctx = (Coro__State)arg;	803	LOGOP myop;
632	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
633		804
634	coro_init_stacks (aTHX);	805	PL_top_env = &PL_start_env;
635	/*PL_curcop = 0;*/
636	/*PL_in_eval = PL_in_eval;*/ /* inherit */
637	SvREFCNT_dec (GvAV (PL_defgv));
638	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
639		806
		807	if (cctx->flags & CC_TRACE)
		808	PL_runops = runops_trace;
		809
		810	Zero (&myop, 1, LOGOP);
		811	myop.op_next = PL_op;
		812	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		813
		814	PUSHMARK (SP);
		815	EXTEND (SP, 2);
		816	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		817	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		818	PUTBACK;
		819	PL_op = (OP *)&myop;
		820	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
640	SPAGAIN;	821	SPAGAIN;
		822	}
641		823
642	if (ctx->stack)	824	/*
643	{	825	* this is a _very_ stripped down perl interpreter ;)
644	ctx->cursp = 0;	826	*/
		827	static void
		828	coro_run (void *arg)
		829	{
		830	dTHX;
645		831
646	PUSHMARK(SP);	832	/* coro_run is the alternative tail of transfer(), so unlock here. */
647	PUTBACK;	833	UNLOCK;
648	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
649		834
650	if (SvTRUE (ERRSV))	835	/* we now skip the entersub that lead to transfer() */
651	croak (NULL);	836	PL_op = PL_op->op_next;
652	else	837
653	croak ("FATAL: CCTXT coroutine returned!");	838	/* inject a fake subroutine call to cctx_init */
		839	prepare_cctx (aTHX_ (coro_cctx *)arg);
		840
		841	/* somebody or something will hit me for both perl_run and PL_restartop */
		842	PL_restartop = PL_op;
		843	perl_run (PL_curinterp);
		844
		845	/*
		846	* If perl-run returns we assume exit() was being called or the coro
		847	* fell off the end, which seems to be the only valid (non-bug)
		848	* reason for perl_run to return. We try to exit by jumping to the
		849	* bootstrap-time "top" top_env, as we cannot restore the "main"
		850	* coroutine as Coro has no such concept
		851	*/
		852	PL_top_env = main_top_env;
		853	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		854	}
		855
		856	static coro_cctx *
		857	cctx_new ()
		858	{
		859	coro_cctx *cctx;
		860	void *stack_start;
		861	size_t stack_size;
		862
		863	++cctx_count;
		864
		865	Newz (0, cctx, 1, coro_cctx);
		866
		867	#if HAVE_MMAP
		868
		869	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		870	/* mmap supposedly does allocate-on-write for us */
		871	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		872
		873	if (cctx->sptr != (void *)-1)
		874	{
		875	# if CORO_STACKGUARD
		876	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		877	# endif
		878	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		879	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		880	cctx->flags |= CC_MAPPED;
654	}	881	}
655	else	882	else
656	{	883	#endif
657	UNOP myop;
658
659	PL_op = (OP *)&myop;
660
661	Zero(&myop, 1, UNOP);
662	myop.op_next = Nullop;
663	myop.op_flags = OPf_WANT_VOID;
664
665	PUSHMARK(SP);
666	XPUSHs (sub_init);
667	/*
668	* the next line is slightly wrong, as PL_op->op_next
669	* is actually being executed so we skip the first op.
670	* that doesn't matter, though, since it is only
671	* pp_nextstate and we never return...
672	* ah yes, and I don't care anyways ;)
673	*/
674	PUTBACK;
675	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
676	SPAGAIN;
677
678	ENTER; /* necessary e.g. for dounwind */
679	}	884	{
680	}	885	cctx->ssize = coro_stacksize * (long)sizeof (long);
		886	New (0, cctx->sptr, coro_stacksize, long);
681		887
682	static void	888	if (!cctx->sptr)
683	continue_coro (void *arg)	889	{
684	{	890	perror ("FATAL: unable to allocate stack for coroutine");
685	/*	891	_exit (EXIT_FAILURE);
686	* this is a _very_ stripped down perl interpreter ;)	892	}
687	*/
688	Coro__State ctx = (Coro__State)arg;
689	JMPENV coro_start_env;
690		893
691	PL_top_env = &ctx->start_env;	894	stack_start = cctx->sptr;
		895	stack_size = cctx->ssize;
		896	}
692		897
693	ctx->cursp = 0;	898	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
694	PL_op = PL_op->op_next;	899	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
695	CALLRUNOPS(aTHX);
696		900
697	abort ();	901	return cctx;
698	}	902	}
699		903
700	STATIC void	904	static void
		905	cctx_destroy (coro_cctx *cctx)
		906	{
		907	if (!cctx)
		908	return;
		909
		910	--cctx_count;
		911
		912	#if CORO_USE_VALGRIND
		913	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		914	#endif
		915
		916	#if HAVE_MMAP
		917	if (cctx->flags & CC_MAPPED)
		918	munmap (cctx->sptr, cctx->ssize);
		919	else
		920	#endif
		921	Safefree (cctx->sptr);
		922
		923	Safefree (cctx);
		924	}
		925
		926	static coro_cctx *
		927	cctx_get (pTHX)
		928	{
		929	while (cctx_first)
		930	{
		931	coro_cctx *cctx = cctx_first;
		932	cctx_first = cctx->next;
		933	--cctx_idle;
		934
		935	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		936	return cctx;
		937
		938	cctx_destroy (cctx);
		939	}
		940
		941	return cctx_new ();
		942	}
		943
		944	static void
		945	cctx_put (coro_cctx *cctx)
		946	{
		947	/* free another cctx if overlimit */
		948	if (cctx_idle >= MAX_IDLE_CCTX)
		949	{
		950	coro_cctx *first = cctx_first;
		951	cctx_first = first->next;
		952	--cctx_idle;
		953
		954	cctx_destroy (first);
		955	}
		956
		957	++cctx_idle;
		958	cctx->next = cctx_first;
		959	cctx_first = cctx;
		960	}
		961
		962	/** coroutine switching *****************************************************/
		963
		964	static void NOINLINE
		965	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		966	{
		967	if (prev != next)
		968	{
		969	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		970	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		971
		972	if (next->flags & CF_RUNNING)
		973	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		974
		975	if (next->flags & CF_DESTROYED)
		976	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		977
		978	if (PL_lex_state != LEX_NOTPARSING)
		979	croak ("Coro::State::transfer called while parsing, but this is not supported");
		980	}
		981	}
		982
		983	/* always use the TRANSFER macro */
		984	static void NOINLINE
701	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	985	transfer (pTHX_ struct coro *prev, struct coro *next)
702	{	986	{
703	dSTACKLEVEL;	987	dSTACKLEVEL;
704		988
		989	/* sometimes transfer is only called to set idle_sp */
		990	if (!next)
		991	{
		992	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		993	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		994	}
705	if (prev != next)	995	else if (prev != next)
706	{	996	{
707	if (next->mainstack)	997	coro_cctx *prev__cctx;
		998
		999	if (prev->flags & CF_NEW)
708	{	1000	{
709	LOCK;	1001	/* create a new empty context */
710	SAVE (prev, flags);	1002	Newz (0, prev->cctx, 1, coro_cctx);
711	LOAD (next);	1003	prev->flags &= ~CF_NEW;
712	UNLOCK;	1004	prev->flags |= CF_RUNNING;
713
714	/* mark this state as in-use */
715	next->mainstack = 0;
716	next->tmps_ix = -2;
717
718	/* stacklevel changed? if yes, grab the stack for us! */
719	if (flags & TRANSFER_SAVE_CCTXT)
720	{
721	if (!prev->stack)
722	allocate_stack (prev, 0);
723	else if (prev->cursp != stacklevel
724	&& prev->stack->usecnt > 1)
725	{
726	prev->gencnt = ++prev->stack->gencnt;
727	prev->stack->usecnt = 1;
728	}
729
730	/* has our stack been invalidated? */
731	if (next->stack && next->stack->gencnt != next->gencnt)
732	{
733	deallocate_stack (next);
734	allocate_stack (next, 1);
735	coro_create (&(next->stack->cctx),
736	continue_coro, (void *)next,
737	next->stack->sptr, labs (next->stack->ssize));
738	}
739
740	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
741	prev->cursp = stacklevel;
742	/* don't add any code here */
743	}
744	else
745	next->cursp = stacklevel;
746	}	1005	}
747	else if (next->tmps_ix == -2)	1006
748	croak ("tried to transfer to running coroutine");	1007	prev->flags &= ~CF_RUNNING;
		1008	next->flags |= CF_RUNNING;
		1009
		1010	LOCK;
		1011
		1012	if (next->flags & CF_NEW)
		1013	{
		1014	/* need to start coroutine */
		1015	next->flags &= ~CF_NEW;
		1016	/* first get rid of the old state */
		1017	save_perl (aTHX_ prev);
		1018	/* setup coroutine call */
		1019	coro_setup (aTHX_ next);
		1020	}
749	else	1021	else
750	{	1022	{
751	LOCK;	1023	/* coroutine already started */
752	SAVE (prev, -1); /* first get rid of the old state */	1024	save_perl (aTHX_ prev);
753	UNLOCK;	1025	load_perl (aTHX_ next);
754
755	if (flags & TRANSFER_SAVE_CCTXT)
756	{
757	if (!prev->stack)
758	allocate_stack (prev, 0);
759
760	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
761	{
762	PL_top_env = &next->start_env;
763
764	setup_coro (next);
765	next->cursp = stacklevel;
766
767	prev->stack->refcnt++;
768	prev->stack->usecnt++;
769	next->stack = prev->stack;
770	next->gencnt = prev->gencnt;
771	}
772	else
773	{
774	assert (!next->stack);
775	allocate_stack (next, 1);
776	coro_create (&(next->stack->cctx),
777	setup_coro, (void *)next,
778	next->stack->sptr, labs (next->stack->ssize));
779	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
780	prev->cursp = stacklevel;
781	/* don't add any code here */
782	}
783	}
784	else
785	{
786	setup_coro (next);
787	next->cursp = stacklevel;
788	}
789	}	1026	}
790	}
791		1027
792	LOCK;	1028	prev__cctx = prev->cctx;
793	if (coro_mortal)	1029
794	{	1030	/* possibly "free" the cctx */
795	SvREFCNT_dec (coro_mortal);	1031	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
796	coro_mortal = 0;	1032	{
797	}	1033	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1034	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1035
		1036	prev->cctx = 0;
		1037
		1038	cctx_put (prev__cctx);
		1039	}
		1040
		1041	++next->usecount;
		1042
		1043	if (!next->cctx)
		1044	next->cctx = cctx_get (aTHX);
		1045
		1046	if (prev__cctx != next->cctx)
		1047	{
		1048	prev__cctx->top_env = PL_top_env;
		1049	PL_top_env = next->cctx->top_env;
		1050	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1051	}
		1052
		1053	free_coro_mortal (aTHX);
798	UNLOCK;	1054	UNLOCK;
		1055	}
799	}	1056	}
800		1057
801	#define SV_CORO(sv,func) \	1058	struct transfer_args
802	do { \	1059	{
803	if (SvROK (sv)) \	1060	struct coro *prev, *next;
804	sv = SvRV (sv); \	1061	};
805	\
806	if (SvTYPE (sv) == SVt_PVHV) \
807	{ \
808	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
809	\
810	if (!he) \
811	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
812	\
813	(sv) = SvRV (HeVAL(he)); \
814	} \
815	\
816	/* must also be changed inside Coro::Cont::yield */ \
817	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
818	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
819	\
820	} while(0)
821		1062
822	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1063	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1064	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
823		1065
		1066	/** high level stuff ********************************************************/
		1067
824	static void	1068	static int
		1069	coro_state_destroy (pTHX_ struct coro *coro)
		1070	{
		1071	if (coro->flags & CF_DESTROYED)
		1072	return 0;
		1073
		1074	coro->flags |= CF_DESTROYED;
		1075
		1076	if (coro->flags & CF_READY)
		1077	{
		1078	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1079	/* alternative: look through all ready queues and remove the coro */
		1080	LOCK;
		1081	--coro_nready;
		1082	UNLOCK;
		1083	}
		1084	else
		1085	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		1086
		1087	if (coro->mainstack && coro->mainstack != main_mainstack)
		1088	{
		1089	struct coro temp;
		1090
		1091	if (coro->flags & CF_RUNNING)
		1092	croak ("FATAL: tried to destroy currently running coroutine");
		1093
		1094	save_perl (aTHX_ &temp);
		1095	load_perl (aTHX_ coro);
		1096
		1097	coro_destroy (aTHX_ coro);
		1098
		1099	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1100
		1101	coro->mainstack = 0;
		1102	}
		1103
		1104	cctx_destroy (coro->cctx);
		1105	SvREFCNT_dec (coro->args);
		1106
		1107	if (coro->next) coro->next->prev = coro->prev;
		1108	if (coro->prev) coro->prev->next = coro->next;
		1109	if (coro == coro_first) coro_first = coro->next;
		1110
		1111	return 1;
		1112	}
		1113
		1114	static int
		1115	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1116	{
		1117	struct coro *coro = (struct coro *)mg->mg_ptr;
		1118	mg->mg_ptr = 0;
		1119
		1120	coro->hv = 0;
		1121
		1122	if (--coro->refcnt < 0)
		1123	{
		1124	coro_state_destroy (aTHX_ coro);
		1125	Safefree (coro);
		1126	}
		1127
		1128	return 0;
		1129	}
		1130
		1131	static int
		1132	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1133	{
		1134	struct coro *coro = (struct coro *)mg->mg_ptr;
		1135
		1136	++coro->refcnt;
		1137
		1138	return 0;
		1139	}
		1140
		1141	static MGVTBL coro_state_vtbl = {
		1142	0, 0, 0, 0,
		1143	coro_state_free,
		1144	0,
		1145	#ifdef MGf_DUP
		1146	coro_state_dup,
		1147	#else
		1148	# define MGf_DUP 0
		1149	#endif
		1150	};
		1151
		1152	static void
		1153	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1154	{
		1155	ta->prev = SvSTATE (prev_sv);
		1156	ta->next = SvSTATE (next_sv);
		1157	TRANSFER_CHECK (*ta);
		1158	}
		1159
		1160	static void
825	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1161	api_transfer (SV *prev_sv, SV *next_sv)
826	{	1162	{
827	SV_CORO (prev, "Coro::transfer");	1163	dTHX;
828	SV_CORO (next, "Coro::transfer");	1164	struct transfer_args ta;
829		1165
830	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	1166	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1167	TRANSFER (ta);
831	}	1168	}
832		1169
833	/** Coro ********************************************************************/	1170	/** Coro ********************************************************************/
834		1171
835	#define PRIO_MAX 3
836	#define PRIO_HIGH 1
837	#define PRIO_NORMAL 0
838	#define PRIO_LOW -1
839	#define PRIO_IDLE -3
840	#define PRIO_MIN -4
841
842	/* for Coro.pm */
843	static GV *coro_current, *coro_idle;
844	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
845	static int coro_nready;
846
847	static void	1172	static void
848	coro_enq (SV *sv)	1173	coro_enq (pTHX_ SV *coro_sv)
849	{	1174	{
850	if (SvTYPE (sv) == SVt_PVHV)
851	{
852	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
853	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
854
855	prio = prio > PRIO_MAX ? PRIO_MAX
856	: prio < PRIO_MIN ? PRIO_MIN
857	: prio;
858
859	av_push (coro_ready [prio - PRIO_MIN], sv);	1175	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
860	coro_nready++;
861
862	return;
863	}
864
865	croak ("Coro::ready tried to enqueue something that is not a coroutine");
866	}	1176	}
867		1177
868	static SV *	1178	static SV *
869	coro_deq (int min_prio)	1179	coro_deq (pTHX_ int min_prio)
870	{	1180	{
871	int prio = PRIO_MAX - PRIO_MIN;	1181	int prio = PRIO_MAX - PRIO_MIN;
872		1182
873	min_prio -= PRIO_MIN;	1183	min_prio -= PRIO_MIN;
874	if (min_prio < 0)	1184	if (min_prio < 0)
875	min_prio = 0;	1185	min_prio = 0;
876		1186
877	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1187	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
878	if (av_len (coro_ready[prio]) >= 0)	1188	if (AvFILLp (coro_ready [prio]) >= 0)
879	{
880	coro_nready--;
881	return av_shift (coro_ready[prio]);	1189	return av_shift (coro_ready [prio]);
882	}
883		1190
884	return 0;	1191	return 0;
885	}	1192	}
886		1193
887	static void	1194	static int
888	api_ready (SV *coro)	1195	api_ready (SV *coro_sv)
889	{	1196	{
		1197	dTHX;
		1198	struct coro *coro;
		1199
890	if (SvROK (coro))	1200	if (SvROK (coro_sv))
891	coro = SvRV (coro);	1201	coro_sv = SvRV (coro_sv);
		1202
		1203	coro = SvSTATE (coro_sv);
		1204
		1205	if (coro->flags & CF_READY)
		1206	return 0;
		1207
		1208	coro->flags |= CF_READY;
892		1209
893	LOCK;	1210	LOCK;
894	coro_enq (SvREFCNT_inc (coro));	1211	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1212	++coro_nready;
895	UNLOCK;	1213	UNLOCK;
		1214
		1215	return 1;
		1216	}
		1217
		1218	static int
		1219	api_is_ready (SV *coro_sv)
		1220	{
		1221	dTHX;
		1222	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1223	}
		1224
		1225	static void
		1226	prepare_schedule (pTHX_ struct transfer_args *ta)
		1227	{
		1228	SV *prev_sv, *next_sv;
		1229
		1230	for (;;)
		1231	{
		1232	LOCK;
		1233	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1234
		1235	/* nothing to schedule: call the idle handler */
		1236	if (!next_sv)
		1237	{
		1238	dSP;
		1239	UNLOCK;
		1240
		1241	ENTER;
		1242	SAVETMPS;
		1243
		1244	PUSHMARK (SP);
		1245	PUTBACK;
		1246	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1247
		1248	FREETMPS;
		1249	LEAVE;
		1250	continue;
		1251	}
		1252
		1253	ta->next = SvSTATE (next_sv);
		1254
		1255	/* cannot transfer to destroyed coros, skip and look for next */
		1256	if (ta->next->flags & CF_DESTROYED)
		1257	{
		1258	UNLOCK;
		1259	SvREFCNT_dec (next_sv);
		1260	/* coro_nready is already taken care of by destroy */
		1261	continue;
		1262	}
		1263
		1264	--coro_nready;
		1265	UNLOCK;
		1266	break;
		1267	}
		1268
		1269	/* free this only after the transfer */
		1270	prev_sv = SvRV (coro_current);
		1271	ta->prev = SvSTATE (prev_sv);
		1272	TRANSFER_CHECK (*ta);
		1273	assert (ta->next->flags & CF_READY);
		1274	ta->next->flags &= ~CF_READY;
		1275	SvRV_set (coro_current, next_sv);
		1276
		1277	LOCK;
		1278	free_coro_mortal (aTHX);
		1279	coro_mortal = prev_sv;
		1280	UNLOCK;
		1281	}
		1282
		1283	static void
		1284	prepare_cede (pTHX_ struct transfer_args *ta)
		1285	{
		1286	api_ready (coro_current);
		1287	prepare_schedule (aTHX_ ta);
		1288	}
		1289
		1290	static int
		1291	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1292	{
		1293	if (coro_nready)
		1294	{
		1295	SV *prev = SvRV (coro_current);
		1296	prepare_schedule (aTHX_ ta);
		1297	api_ready (prev);
		1298	return 1;
		1299	}
		1300	else
		1301	return 0;
896	}	1302	}
897		1303
898	static void	1304	static void
899	api_schedule (void)	1305	api_schedule (void)
900	{	1306	{
901	SV *prev, *next;	1307	dTHX;
		1308	struct transfer_args ta;
902		1309
903	LOCK;	1310	prepare_schedule (aTHX_ &ta);
904		1311	TRANSFER (ta);
905	prev = SvRV (GvSV (coro_current));
906	next = coro_deq (PRIO_MIN);
907
908	if (!next)
909	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
910
911	/* free this only after the transfer */
912	coro_mortal = prev;
913	SV_CORO (prev, "Coro::schedule");
914
915	SvRV (GvSV (coro_current)) = next;
916
917	SV_CORO (next, "Coro::schedule");
918
919	UNLOCK;
920
921	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
922	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
923	}	1312	}
924		1313
925	static void	1314	static int
926	api_cede (void)	1315	api_cede (void)
927	{	1316	{
928	LOCK;	1317	dTHX;
929	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1318	struct transfer_args ta;
930	UNLOCK;
931		1319
932	api_schedule ();	1320	prepare_cede (aTHX_ &ta);
933	}
934		1321
		1322	if (ta.prev != ta.next)
		1323	{
		1324	TRANSFER (ta);
		1325	return 1;
		1326	}
		1327	else
		1328	return 0;
		1329	}
		1330
		1331	static int
		1332	api_cede_notself (void)
		1333	{
		1334	dTHX;
		1335	struct transfer_args ta;
		1336
		1337	if (prepare_cede_notself (aTHX_ &ta))
		1338	{
		1339	TRANSFER (ta);
		1340	return 1;
		1341	}
		1342	else
		1343	return 0;
		1344	}
		1345
		1346	static void
		1347	api_trace (SV *coro_sv, int flags)
		1348	{
		1349	dTHX;
		1350	struct coro *coro = SvSTATE (coro_sv);
		1351
		1352	if (flags & CC_TRACE)
		1353	{
		1354	if (!coro->cctx)
		1355	coro->cctx = cctx_new ();
		1356	else if (!(coro->cctx->flags & CC_TRACE))
		1357	croak ("cannot enable tracing on coroutine with custom stack");
		1358
		1359	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1360	}
		1361	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1362	{
		1363	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1364
		1365	if (coro->flags & CF_RUNNING)
		1366	PL_runops = RUNOPS_DEFAULT;
		1367	else
		1368	coro->runops = RUNOPS_DEFAULT;
		1369	}
		1370	}
		1371
935	MODULE = Coro::State PACKAGE = Coro::State	1372	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
936		1373
937	PROTOTYPES: ENABLE	1374	PROTOTYPES: DISABLE
938		1375
939	BOOT:	1376	BOOT:
940	{ /* {} necessary for stoopid perl-5.6.x */	1377	{
941	#ifdef USE_ITHREADS	1378	#ifdef USE_ITHREADS
942	MUTEX_INIT (&coro_mutex);	1379	MUTEX_INIT (&coro_mutex);
943	#endif	1380	#endif
		1381	BOOT_PAGESIZE;
944		1382
945	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1383	irsgv = gv_fetchpv ("/", 1, SVt_PV);
946	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1384
947	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1385	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
948		1386
949	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1387	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
950	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1388	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
951	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1389	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
952	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1390	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
953		1391
954	main_mainstack = PL_mainstack;	1392	main_mainstack = PL_mainstack;
		1393	main_top_env = PL_top_env;
		1394
		1395	while (main_top_env->je_prev)
		1396	main_top_env = main_top_env->je_prev;
955		1397
956	coroapi.ver = CORO_API_VERSION;	1398	coroapi.ver = CORO_API_VERSION;
957	coroapi.transfer = api_transfer;	1399	coroapi.transfer = api_transfer;
958	}
959		1400
960	Coro::State	1401	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
961	_newprocess(args)	1402	}
962	SV * args	1403
963	PROTOTYPE: $	1404	SV *
		1405	new (char *klass, ...)
964	CODE:	1406	CODE:
965	Coro__State coro;	1407	{
		1408	struct coro *coro;
		1409	HV *hv;
		1410	int i;
966		1411
967	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
968	croak ("Coro::State::_newprocess expects an arrayref");
969
970	Newz (0, coro, 1, struct coro);	1412	Newz (0, coro, 1, struct coro);
		1413	coro->args = newAV ();
		1414	coro->flags = CF_NEW;
971		1415
972	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1416	if (coro_first) coro_first->prev = coro;
973	coro->mainstack = 0; /* actual work is done inside transfer */	1417	coro->next = coro_first;
974	coro->stack = 0;	1418	coro_first = coro;
975		1419
976	/* same as JMPENV_BOOTSTRAP */	1420	coro->hv = hv = newHV ();
977	/* we might be able to recycle start_env, but safe is safe */	1421	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
978	//Zero(&coro->start_env, 1, JMPENV);	1422	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
979	coro->start_env.je_ret = -1;
980	coro->start_env.je_mustcatch = TRUE;
981		1423
982	RETVAL = coro;	1424	for (i = 1; i < items; i++)
		1425	av_push (coro->args, newSVsv (ST (i)));
		1426	}
983	OUTPUT:	1427	OUTPUT:
984	RETVAL	1428	RETVAL
985		1429
		1430	# these not obviously related functions are all rolled into the same xs
		1431	# function to increase chances that they all will call transfer with the same
		1432	# stack offset
986	void	1433	void
987	transfer(prev, next, flags)	1434	_set_stacklevel (...)
988	SV *prev	1435	ALIAS:
989	SV *next	1436	Coro::State::transfer = 1
990	int flags	1437	Coro::schedule = 2
991	PROTOTYPE: @	1438	Coro::cede = 3
		1439	Coro::cede_notself = 4
992	CODE:	1440	CODE:
993	PUTBACK;	1441	{
994	SV_CORO (next, "Coro::transfer");	1442	struct transfer_args ta;
995	SV_CORO (prev, "Coro::transfer");	1443
996	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1444	switch (ix)
997	SPAGAIN;	1445	{
		1446	case 0:
		1447	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1448	ta.next = 0;
		1449	break;
		1450
		1451	case 1:
		1452	if (items != 2)
		1453	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1454
		1455	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1456	break;
		1457
		1458	case 2:
		1459	prepare_schedule (aTHX_ &ta);
		1460	break;
		1461
		1462	case 3:
		1463	prepare_cede (aTHX_ &ta);
		1464	break;
		1465
		1466	case 4:
		1467	if (!prepare_cede_notself (aTHX_ &ta))
		1468	XSRETURN_EMPTY;
		1469
		1470	break;
		1471	}
		1472
		1473	BARRIER;
		1474	TRANSFER (ta);
		1475
		1476	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1477	XSRETURN_YES;
		1478	}
		1479
		1480	bool
		1481	_destroy (SV *coro_sv)
		1482	CODE:
		1483	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1484	OUTPUT:
		1485	RETVAL
998		1486
999	void	1487	void
1000	DESTROY(coro)
1001	Coro::State coro
1002	CODE:
1003
1004	if (coro->mainstack && coro->mainstack != main_mainstack)
1005	{
1006	struct coro temp;
1007
1008	PUTBACK;
1009	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
1010	LOAD(aTHX_ coro);
1011	SPAGAIN;
1012
1013	destroy_stacks (aTHX);
1014
1015	LOAD((&temp)); /* this will get rid of defsv etc.. */
1016	SPAGAIN;
1017
1018	coro->mainstack = 0;
1019	}
1020
1021	deallocate_stack (coro);
1022	SvREFCNT_dec (coro->args);
1023	Safefree (coro);
1024
1025	void
1026	_exit(code)	1488	_exit (code)
1027	int code	1489	int code
1028	PROTOTYPE: $	1490	PROTOTYPE: $
1029	CODE:	1491	CODE:
1030	_exit (code);	1492	_exit (code);
1031		1493
1032	MODULE = Coro::State PACKAGE = Coro::Cont	1494	int
		1495	cctx_stacksize (int new_stacksize = 0)
		1496	CODE:
		1497	RETVAL = coro_stacksize;
		1498	if (new_stacksize)
		1499	coro_stacksize = new_stacksize;
		1500	OUTPUT:
		1501	RETVAL
1033		1502
1034	# this is slightly dirty (should expose a c-level api)	1503	int
		1504	cctx_count ()
		1505	CODE:
		1506	RETVAL = cctx_count;
		1507	OUTPUT:
		1508	RETVAL
		1509
		1510	int
		1511	cctx_idle ()
		1512	CODE:
		1513	RETVAL = cctx_idle;
		1514	OUTPUT:
		1515	RETVAL
1035		1516
1036	void	1517	void
1037	yield(...)	1518	list ()
1038	PROTOTYPE: @	1519	PPCODE:
		1520	{
		1521	struct coro *coro;
		1522	for (coro = coro_first; coro; coro = coro->next)
		1523	if (coro->hv)
		1524	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1525	}
		1526
		1527	void
		1528	call (Coro::State coro, SV *coderef)
		1529	ALIAS:
		1530	eval = 1
		1531	CODE:
		1532	{
		1533	if (coro->mainstack)
		1534	{
		1535	struct coro temp;
		1536	Zero (&temp, 1, struct coro);
		1537
		1538	if (!(coro->flags & CF_RUNNING))
		1539	{
		1540	save_perl (aTHX_ &temp);
		1541	load_perl (aTHX_ coro);
		1542	}
		1543
		1544	{
		1545	dSP;
		1546	ENTER;
		1547	SAVETMPS;
		1548	PUSHMARK (SP);
		1549	PUTBACK;
		1550	if (ix)
		1551	eval_sv (coderef, 0);
		1552	else
		1553	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1554	SPAGAIN;
		1555	FREETMPS;
		1556	LEAVE;
		1557	PUTBACK;
		1558	}
		1559
		1560	if (!(coro->flags & CF_RUNNING))
		1561	{
		1562	save_perl (aTHX_ coro);
		1563	load_perl (aTHX_ &temp);
		1564	}
		1565	}
		1566	}
		1567
		1568	SV *
		1569	is_ready (Coro::State coro)
		1570	PROTOTYPE: $
		1571	ALIAS:
		1572	is_ready = CF_READY
		1573	is_running = CF_RUNNING
		1574	is_new = CF_NEW
		1575	is_destroyed = CF_DESTROYED
		1576	CODE:
		1577	RETVAL = boolSV (coro->flags & ix);
		1578	OUTPUT:
		1579	RETVAL
		1580
		1581	void
		1582	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1583
		1584	SV *
		1585	has_stack (Coro::State coro)
		1586	PROTOTYPE: $
		1587	CODE:
		1588	RETVAL = boolSV (!!coro->cctx);
		1589	OUTPUT:
		1590	RETVAL
		1591
		1592	int
		1593	is_traced (Coro::State coro)
		1594	PROTOTYPE: $
		1595	CODE:
		1596	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1597	OUTPUT:
		1598	RETVAL
		1599
		1600	IV
		1601	rss (Coro::State coro)
		1602	PROTOTYPE: $
		1603	ALIAS:
		1604	usecount = 1
1039	CODE:	1605	CODE:
1040	static SV *returnstk;	1606	switch (ix)
1041	SV *sv;	1607	{
1042	AV *defav = GvAV (PL_defgv);	1608	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1043	struct coro *prev, *next;	1609	case 1: RETVAL = coro->usecount; break;
		1610	}
		1611	OUTPUT:
		1612	RETVAL
1044		1613
1045	if (!returnstk)
1046	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1047
1048	/* set up @_ -- ugly */
1049	av_clear (defav);
1050	av_fill (defav, items - 1);
1051	while (items--)
1052	av_store (defav, items, SvREFCNT_inc (ST(items)));
1053
1054	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1055	sv = av_pop ((AV *)SvRV (returnstk));
1056	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1057	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1058	SvREFCNT_dec (sv);
1059
1060	transfer(aTHX_ prev, next, 0);
1061		1614
1062	MODULE = Coro::State PACKAGE = Coro	1615	MODULE = Coro::State PACKAGE = Coro
1063		1616
1064	# this is slightly dirty (should expose a c-level api)
1065
1066	BOOT:	1617	BOOT:
1067	{	1618	{
1068	int i;	1619	int i;
		1620
		1621	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1622	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1623	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1624
		1625	coro_current = get_sv ("Coro::current", FALSE);
		1626	SvREADONLY_on (coro_current);
		1627
1069	HV *stash = gv_stashpv ("Coro", TRUE);	1628	coro_stash = gv_stashpv ("Coro", TRUE);
1070		1629
1071	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1630	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1631	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1632	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1633	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1634	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1635	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1077
1078	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1079	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1080		1636
1081	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1637	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1082	coro_ready[i] = newAV ();	1638	coro_ready[i] = newAV ();
1083		1639
1084	{	1640	{
1085	SV *sv = perl_get_sv("Coro::API", 1);	1641	SV *sv = perl_get_sv("Coro::API", 1);
1086		1642
1087	coroapi.schedule = api_schedule;	1643	coroapi.schedule = api_schedule;
1088	coroapi.cede = api_cede;	1644	coroapi.cede = api_cede;
		1645	coroapi.cede_notself = api_cede_notself;
1089	coroapi.ready = api_ready;	1646	coroapi.ready = api_ready;
		1647	coroapi.is_ready = api_is_ready;
1090	coroapi.nready = &coro_nready;	1648	coroapi.nready = &coro_nready;
1091	coroapi.current = coro_current;	1649	coroapi.current = coro_current;
1092		1650
1093	GCoroAPI = &coroapi;	1651	GCoroAPI = &coroapi;
1094	sv_setiv(sv, (IV)&coroapi);	1652	sv_setiv (sv, (IV)&coroapi);
1095	SvREADONLY_on(sv);	1653	SvREADONLY_on (sv);
1096	}	1654	}
1097	}	1655	}
1098		1656
1099	#if !PERL_MICRO
1100
1101	void	1657	void
1102	ready(self)	1658	_set_current (SV *current)
1103	SV * self
1104	PROTOTYPE: $	1659	PROTOTYPE: $
1105	CODE:	1660	CODE:
1106	api_ready (self);	1661	SvREFCNT_dec (SvRV (coro_current));
1107		1662	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1108	#endif
1109		1663
1110	int	1664	int
		1665	prio (Coro::State coro, int newprio = 0)
		1666	ALIAS:
		1667	nice = 1
		1668	CODE:
		1669	{
		1670	RETVAL = coro->prio;
		1671
		1672	if (items > 1)
		1673	{
		1674	if (ix)
		1675	newprio = coro->prio - newprio;
		1676
		1677	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1678	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1679
		1680	coro->prio = newprio;
		1681	}
		1682	}
		1683	OUTPUT:
		1684	RETVAL
		1685
		1686	SV *
		1687	ready (SV *self)
		1688	PROTOTYPE: $
		1689	CODE:
		1690	RETVAL = boolSV (api_ready (self));
		1691	OUTPUT:
		1692	RETVAL
		1693
		1694	int
1111	nready(...)	1695	nready (...)
1112	PROTOTYPE:	1696	PROTOTYPE:
1113	CODE:	1697	CODE:
1114	RETVAL = coro_nready;	1698	RETVAL = coro_nready;
1115	OUTPUT:	1699	OUTPUT:
1116	RETVAL	1700	RETVAL
1117		1701
		1702	# for async_pool speedup
1118	void	1703	void
1119	schedule(...)	1704	_pool_1 (SV *cb)
1120	PROTOTYPE:
1121	CODE:	1705	CODE:
1122	api_schedule ();	1706	{
		1707	struct coro *coro = SvSTATE (coro_current);
		1708	HV *hv = (HV *)SvRV (coro_current);
		1709	AV *defav = GvAV (PL_defgv);
		1710	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1711	AV *invoke_av;
		1712	int i, len;
		1713
		1714	if (!invoke)
		1715	croak ("\3terminate\2\n");
		1716
		1717	SvREFCNT_dec (coro->saved_deffh);
		1718	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1719
		1720	hv_store (hv, "desc", sizeof ("desc") - 1,
		1721	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1722
		1723	invoke_av = (AV *)SvRV (invoke);
		1724	len = av_len (invoke_av);
		1725
		1726	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1727
		1728	if (len > 0)
		1729	{
		1730	av_fill (defav, len - 1);
		1731	for (i = 0; i < len; ++i)
		1732	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1733	}
		1734
		1735	SvREFCNT_dec (invoke);
		1736	}
1123		1737
1124	void	1738	void
1125	cede(...)	1739	_pool_2 (SV *cb)
1126	PROTOTYPE:
1127	CODE:	1740	CODE:
1128	api_cede ();	1741	{
		1742	struct coro *coro = SvSTATE (coro_current);
1129		1743
		1744	sv_setsv (cb, &PL_sv_undef);
		1745
		1746	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1747	coro->saved_deffh = 0;
		1748
		1749	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1750	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1751	croak ("\3terminate\2\n");
		1752
		1753	av_clear (GvAV (PL_defgv));
		1754	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1755	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1756
		1757	coro->prio = 0;
		1758
		1759	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1760	api_trace (coro_current, 0);
		1761
		1762	av_push (av_async_pool, newSVsv (coro_current));
		1763	}
		1764
		1765
		1766	MODULE = Coro::State PACKAGE = Coro::AIO
		1767
		1768	SV *
		1769	_get_state ()
		1770	CODE:
		1771	{
		1772	struct io_state *data;
		1773
		1774	RETVAL = newSV (sizeof (struct io_state));
		1775	data = (struct io_state *)SvPVX (RETVAL);
		1776	SvCUR_set (RETVAL, sizeof (struct io_state));
		1777	SvPOK_only (RETVAL);
		1778
		1779	data->errorno = errno;
		1780	data->laststype = PL_laststype;
		1781	data->laststatval = PL_laststatval;
		1782	data->statcache = PL_statcache;
		1783	}
		1784	OUTPUT:
		1785	RETVAL
		1786
		1787	void
		1788	_set_state (char *data_)
		1789	PROTOTYPE: $
		1790	CODE:
		1791	{
		1792	struct io_state *data = (void *)data_;
		1793
		1794	errno = data->errorno;
		1795	PL_laststype = data->laststype;
		1796	PL_laststatval = data->laststatval;
		1797	PL_statcache = data->statcache;
		1798	}
		1799

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