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Comparing Coro/Coro/State.xs (file contents):
Revision 1.64 by root, Mon Mar 21 15:06:51 2005 UTC vs.
Revision 1.147 by root, Mon Mar 19 15:50:48 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if PATCHLEVEL < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	|| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
14	# endif	57	# endif
15	# ifndef call_sv	58	# ifndef call_sv
16	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
29	# endif	72	# endif
30	#endif	73	#endif
31		74
32	#include <signal.h>	75	/* 5.8.7 */
33		76	#ifndef SvRV_set
34	#ifdef HAVE_MMAP	77	# define SvRV_set(s,v) SvRV(s) = (v)
35	# include <unistd.h>
36	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS
38	# ifdef MAP_ANON
39	# define MAP_ANONYMOUS MAP_ANON
40	# else
41	# undef HAVE_MMAP
42	# endif
43	# endif	78	#endif
44	#endif
45		79
46	#define SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	#define UCORO_STATE "_coro_state"	81	# undef CORO_STACKGUARD
		82	#endif
		83
		84	#ifndef CORO_STACKGUARD
		85	# define CORO_STACKGUARD 0
		86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
48		92
49	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macro should declare a variable stacklevel that contains and approximation
50	* to the current C stack pointer. Its property is that it changes with each call	94	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	95	* and should be unique. */
		96	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	97	#define STACKLEVEL ((void *)&stacklevel)
53		98
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		100
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	101	#if __GNUC__ >= 3
		102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		104	#else
		105	# define attribute(x)
		106	# define BARRIER
		107	#endif
		108
		109	#define NOINLINE attribute ((noinline))
57		110
58	#include "CoroAPI.h"	111	#include "CoroAPI.h"
59		112
60	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	115	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	116	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	117	#else
65	# define LOCK 0	118	# define LOCK (void)0
66	# define UNLOCK 0	119	# define UNLOCK (void)0
67	#endif	120	#endif
68		121
		122	/* helper storage struct for Coro::AIO */
		123	struct io_state
		124	{
		125	int errorno;
		126	I32 laststype;
		127	int laststatval;
		128	Stat_t statcache;
		129	};
		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
69	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	133	static AV *main_mainstack; /* used to differentiate between $main and others */
71	static HV *coro_state_stash;	134	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
75		136
76	/* this is actually not only the c stack but also c registers etc... */	137	static struct coro_cctx *cctx_first;
		138	static int cctx_count, cctx_idle;
		139
		140	/* this is a structure representing a c-level coroutine */
77	typedef struct {	141	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	142	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		143
		144	/* the stack */
		145	void *sptr;
		146	size_t ssize;
		147
		148	/* cpu state */
		149	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		150	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		151	JMPENV *top_env;
82	coro_context cctx;	152	coro_context cctx;
83		153
84	void *sptr;	154	#if CORO_USE_VALGRIND
85	long ssize; /* positive == mmap, otherwise malloc */	155	int valgrind_id;
86	} coro_stack;	156	#endif
		157	char inuse, mapped;
		158	} coro_cctx;
87		159
		160	enum {
		161	CF_RUNNING = 0x0001, /* coroutine is running */
		162	CF_READY = 0x0002, /* coroutine is ready */
		163	CF_NEW = 0x0004, /* has never been switched to */
		164	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		165	};
		166
		167	/* this is a structure representing a perl-level coroutine */
88	struct coro {	168	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	169	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	170	coro_cctx *cctx;
91
92	/* the optional C context */
93	coro_stack *stack;
94	void *cursp;
95	int gencnt;
96
97	/* optionally saved, might be zero */
98	AV *defav;
99	SV *defsv;
100	SV *errsv;
101
102	/* saved global state not related to stacks */
103	U8 dowarn;
104	I32 in_eval;
105
106	/* the stacks and related info (callchain etc..) */
107	PERL_SI *curstackinfo;
108	AV *curstack;
109	AV *mainstack;
110	SV **stack_sp;
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	CV *compcv;
115	SV **stack_base;
116	SV **stack_max;
117	SV **tmps_stack;
118	I32 tmps_floor;
119	I32 tmps_ix;
120	I32 tmps_max;
121	I32 *markstack;
122	I32 *markstack_ptr;
123	I32 *markstack_max;
124	I32 *scopestack;
125	I32 scopestack_ix;
126	I32 scopestack_max;
127	ANY *savestack;
128	I32 savestack_ix;
129	I32 savestack_max;
130	OP **retstack;
131	I32 retstack_ix;
132	I32 retstack_max;
133	COP *curcop;
134	JMPENV *top_env;
135		171
136	/* data associated with this coroutine (initial args) */	172	/* data associated with this coroutine (initial args) */
137	AV *args;	173	AV *args;
		174	int refcnt;
		175	int save; /* CORO_SAVE flags */
		176	int flags; /* CF_ flags */
		177
		178	/* optionally saved, might be zero */
		179	AV *defav; /* @_ */
		180	SV *defsv; /* $_ */
		181	SV *errsv; /* $@ */
		182	GV *deffh; /* default filehandle */
		183	SV *irssv; /* $/ */
		184	SV *irssv_sv; /* real $/ cache */
		185
		186	#define VAR(name,type) type name;
		187	# include "state.h"
		188	#undef VAR
		189
		190	/* coro process data */
		191	int prio;
138	};	192	};
139		193
140	typedef struct coro *Coro__State;	194	typedef struct coro *Coro__State;
141	typedef struct coro *Coro__State_or_hashref;	195	typedef struct coro *Coro__State_or_hashref;
142		196
143	/* mostly copied from op.c:cv_clone2 */	197	/** Coro ********************************************************************/
144	STATIC AV *	198
145	clone_padlist (pTHX_ AV *protopadlist)	199	#define PRIO_MAX 3
		200	#define PRIO_HIGH 1
		201	#define PRIO_NORMAL 0
		202	#define PRIO_LOW -1
		203	#define PRIO_IDLE -3
		204	#define PRIO_MIN -4
		205
		206	/* for Coro.pm */
		207	static SV *coro_current;
		208	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		209	static int coro_nready;
		210
		211	/** lowlevel stuff **********************************************************/
		212
		213	static AV *
		214	coro_clone_padlist (pTHX_ CV *cv)
146	{	215	{
147	AV *av;	216	AV *padlist = CvPADLIST (cv);
148	I32 ix;
149	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
150	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
151	SV **pname = AvARRAY (protopad_name);
152	SV **ppad = AvARRAY (protopad);
153	I32 fname = AvFILLp (protopad_name);
154	I32 fpad = AvFILLp (protopad);
155	AV *newpadlist, *newpad_name, *newpad;	217	AV *newpadlist, *newpad;
156	SV **npad;
157
158	newpad_name = newAV ();
159	for (ix = fname; ix >= 0; ix--)
160	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
161
162	newpad = newAV ();
163	av_fill (newpad, AvFILLp (protopad));
164	npad = AvARRAY (newpad);
165		218
166	newpadlist = newAV ();	219	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	220	AvREAL_off (newpadlist);
168	av_store (newpadlist, 0, (SV *) newpad_name);	221	#if PERL_VERSION_ATLEAST (5,9,0)
		222	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		223	#else
		224	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		225	#endif
		226	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		227	--AvFILLp (padlist);
		228
		229	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
169	av_store (newpadlist, 1, (SV *) newpad);	230	av_store (newpadlist, 1, (SV *)newpad);
170
171	av = newAV (); /* will be @_ */
172	av_extend (av, 0);
173	av_store (newpad, 0, (SV *) av);
174	AvFLAGS (av) = AVf_REIFY;
175
176	for (ix = fpad; ix > 0; ix--)
177	{
178	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
179
180	if (namesv && namesv != &PL_sv_undef)
181	{
182	char *name = SvPVX (namesv); /* XXX */
183
184	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
185	{ /* lexical from outside? */
186	npad[ix] = SvREFCNT_inc (ppad[ix]);
187	}
188	else
189	{ /* our own lexical */
190	SV *sv;
191	if (*name == '&')
192	sv = SvREFCNT_inc (ppad[ix]);
193	else if (*name == '@')
194	sv = (SV *) newAV ();
195	else if (*name == '%')
196	sv = (SV *) newHV ();
197	else
198	sv = NEWSV (0, 0);
199
200	#ifdef SvPADBUSY
201	if (!SvPADBUSY (sv))
202	#endif
203	SvPADMY_on (sv);
204
205	npad[ix] = sv;
206	}
207	}
208	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
209	{
210	npad[ix] = SvREFCNT_inc (ppad[ix]);
211	}
212	else
213	{
214	SV *sv = NEWSV (0, 0);
215	SvPADTMP_on (sv);
216	npad[ix] = sv;
217	}
218	}
219
220	#if 0 /* return -ENOTUNDERSTOOD */
221	/* Now that vars are all in place, clone nested closures. */
222
223	for (ix = fpad; ix > 0; ix--) {
224	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
225	if (namesv
226	&& namesv != &PL_sv_undef
227	&& !(SvFLAGS(namesv) & SVf_FAKE)
228	&& *SvPVX(namesv) == '&'
229	&& CvCLONE(ppad[ix]))
230	{
231	CV *kid = cv_clone((CV*)ppad[ix]);
232	SvREFCNT_dec(ppad[ix]);
233	CvCLONE_on(kid);
234	SvPADMY_on(kid);
235	npad[ix] = (SV*)kid;
236	}
237	}
238	#endif
239		231
240	return newpadlist;	232	return newpadlist;
241	}	233	}
242		234
243	STATIC void	235	static void
244	free_padlist (pTHX_ AV *padlist)	236	free_padlist (pTHX_ AV *padlist)
245	{	237	{
246	/* may be during global destruction */	238	/* may be during global destruction */
247	if (SvREFCNT (padlist))	239	if (SvREFCNT (padlist))
248	{	240	{
…		…
262		254
263	SvREFCNT_dec ((SV*)padlist);	255	SvREFCNT_dec ((SV*)padlist);
264	}	256	}
265	}	257	}
266		258
267	STATIC int	259	static int
268	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	260	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
269	{	261	{
270	AV *padlist;	262	AV *padlist;
271	AV *av = (AV *)mg->mg_obj;	263	AV *av = (AV *)mg->mg_obj;
272		264
273	/* casting is fun. */	265	/* casting is fun. */
274	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	266	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275	free_padlist (aTHX_ padlist);	267	free_padlist (aTHX_ padlist);
276		268
277	SvREFCNT_dec (av);	269	SvREFCNT_dec (av);
		270
		271	return 0;
278	}	272	}
279		273
280	#define PERL_MAGIC_coro PERL_MAGIC_ext	274	#define PERL_MAGIC_coro PERL_MAGIC_ext
281		275
282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	276	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
283		277
		278	#define CORO_MAGIC(cv) \
		279	SvMAGIC (cv) \
		280	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		281	? SvMAGIC (cv) \
		282	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		283	: 0
		284
284	/* the next two functions merely cache the padlists */	285	/* the next two functions merely cache the padlists */
285	STATIC void	286	static void
286	get_padlist (pTHX_ CV *cv)	287	get_padlist (pTHX_ CV *cv)
287	{	288	{
288	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	289	MAGIC *mg = CORO_MAGIC (cv);
		290	AV *av;
289		291
290	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	292	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
291	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	293	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
292	else	294	else
		295	{
		296	#if CORO_PREFER_PERL_FUNCTIONS
		297	/* this is probably cleaner, but also slower? */
		298	CV *cp = Perl_cv_clone (cv);
		299	CvPADLIST (cv) = CvPADLIST (cp);
		300	CvPADLIST (cp) = 0;
		301	SvREFCNT_dec (cp);
		302	#else
293	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	303	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		304	#endif
		305	}
294	}	306	}
295		307
296	STATIC void	308	static void
297	put_padlist (pTHX_ CV *cv)	309	put_padlist (pTHX_ CV *cv)
298	{	310	{
299	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	311	MAGIC *mg = CORO_MAGIC (cv);
		312	AV *av;
300		313
301	if (!mg)	314	if (!mg)
302	{	315	{
303	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	316	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
304	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	317	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
305	mg->mg_virtual = &vtbl_coro;	318	mg->mg_virtual = &vtbl_coro;
306	mg->mg_obj = (SV *)newAV ();	319	mg->mg_obj = (SV *)newAV ();
307	}	320	}
308		321
309	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	322	av = (AV *)mg->mg_obj;
		323
		324	if (AvFILLp (av) >= AvMAX (av))
		325	av_extend (av, AvMAX (av) + 1);
		326
		327	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
310	}	328	}
		329
		330	/** load & save, init *******************************************************/
311		331
312	#define SB do {	332	#define SB do {
313	#define SE } while (0)	333	#define SE } while (0)
314		334
315	#define LOAD(state) load_state(aTHX_ (state));
316	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
317
318	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	335	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
319		336
320	static void	337	static void
321	load_state(pTHX_ Coro__State c)	338	load_perl (pTHX_ Coro__State c)
322	{	339	{
323	PL_dowarn = c->dowarn;	340	#define VAR(name,type) PL_ ## name = c->name;
324	PL_in_eval = c->in_eval;	341	# include "state.h"
325		342	#undef VAR
326	PL_curstackinfo = c->curstackinfo;
327	PL_curstack = c->curstack;
328	PL_mainstack = c->mainstack;
329	PL_stack_sp = c->stack_sp;
330	PL_op = c->op;
331	PL_curpad = c->curpad;
332	PL_comppad = c->comppad;
333	PL_compcv = c->compcv;
334	PL_stack_base = c->stack_base;
335	PL_stack_max = c->stack_max;
336	PL_tmps_stack = c->tmps_stack;
337	PL_tmps_floor = c->tmps_floor;
338	PL_tmps_ix = c->tmps_ix;
339	PL_tmps_max = c->tmps_max;
340	PL_markstack = c->markstack;
341	PL_markstack_ptr = c->markstack_ptr;
342	PL_markstack_max = c->markstack_max;
343	PL_scopestack = c->scopestack;
344	PL_scopestack_ix = c->scopestack_ix;
345	PL_scopestack_max = c->scopestack_max;
346	PL_savestack = c->savestack;
347	PL_savestack_ix = c->savestack_ix;
348	PL_savestack_max = c->savestack_max;
349	PL_retstack = c->retstack;
350	PL_retstack_ix = c->retstack_ix;
351	PL_retstack_max = c->retstack_max;
352	PL_curcop = c->curcop;
353	PL_top_env = c->top_env;
354		343
355	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	344	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
356	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	345	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
357	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	346	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		347	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		348
		349	if (c->irssv)
		350	{
		351	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		352	{
		353	SvREFCNT_dec (c->irssv);
		354	c->irssv = 0;
		355	}
		356	else
		357	{
		358	REPLACE_SV (PL_rs, c->irssv);
		359	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		360	sv_setsv (c->irssv_sv, PL_rs);
		361	}
		362	}
358		363
359	{	364	{
360	dSP;	365	dSP;
361	CV *cv;	366	CV *cv;
362		367
363	/* now do the ugly restore mess */	368	/* now do the ugly restore mess */
364	while ((cv = (CV *)POPs))	369	while ((cv = (CV *)POPs))
365	{	370	{
366	AV *padlist = (AV *)POPs;
367
368	if (padlist)
369	{
370	put_padlist (aTHX_ cv); /* mark this padlist as available */	371	put_padlist (aTHX_ cv); /* mark this padlist as available */
371	CvPADLIST(cv) = padlist;	372	CvDEPTH (cv) = PTR2IV (POPs);
372	}	373	CvPADLIST (cv) = (AV *)POPs;
373
374	++CvDEPTH(cv);
375	}	374	}
376		375
377	PUTBACK;	376	PUTBACK;
378	}	377	}
		378	assert (!PL_comppad || AvARRAY (PL_comppad));//D
379	}	379	}
380		380
381	static void	381	static void
382	save_state(pTHX_ Coro__State c, int flags)	382	save_perl (pTHX_ Coro__State c)
383	{	383	{
		384	assert (!PL_comppad || AvARRAY (PL_comppad));//D
384	{	385	{
385	dSP;	386	dSP;
386	I32 cxix = cxstack_ix;	387	I32 cxix = cxstack_ix;
387	PERL_CONTEXT *ccstk = cxstack;	388	PERL_CONTEXT *ccstk = cxstack;
388	PERL_SI *top_si = PL_curstackinfo;	389	PERL_SI *top_si = PL_curstackinfo;
…		…
390	/*	391	/*
391	* the worst thing you can imagine happens first - we have to save	392	* the worst thing you can imagine happens first - we have to save
392	* (and reinitialize) all cv's in the whole callchain :(	393	* (and reinitialize) all cv's in the whole callchain :(
393	*/	394	*/
394		395
		396	EXTEND (SP, 3 + 1);
395	PUSHs (Nullsv);	397	PUSHs (Nullsv);
396	/* this loop was inspired by pp_caller */	398	/* this loop was inspired by pp_caller */
397	for (;;)	399	for (;;)
398	{	400	{
399	while (cxix >= 0)	401	while (cxix >= 0)
400	{	402	{
401	PERL_CONTEXT *cx = &ccstk[cxix--];	403	PERL_CONTEXT *cx = &ccstk[cxix--];
402		404
403	if (CxTYPE(cx) == CXt_SUB)	405	if (CxTYPE (cx) == CXt_SUB)
404	{	406	{
405	CV *cv = cx->blk_sub.cv;	407	CV *cv = cx->blk_sub.cv;
		408
406	if (CvDEPTH(cv))	409	if (CvDEPTH (cv))
407	{	410	{
408	EXTEND (SP, CvDEPTH(cv)*2);	411	EXTEND (SP, 3);
409
410	while (--CvDEPTH(cv))
411	{
412	/* this tells the restore code to increment CvDEPTH */
413	PUSHs (Nullsv);
414	PUSHs ((SV *)cv);
415	}
416
417	PUSHs ((SV *)CvPADLIST(cv));	412	PUSHs ((SV *)CvPADLIST (cv));
		413	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
418	PUSHs ((SV *)cv);	414	PUSHs ((SV *)cv);
419		415
		416	CvDEPTH (cv) = 0;
420	get_padlist (aTHX_ cv); /* this is a monster */	417	get_padlist (aTHX_ cv);
421	}	418	}
422	}	419	}
423	#ifdef CXt_FORMAT
424	else if (CxTYPE(cx) == CXt_FORMAT)
425	{
426	/* I never used formats, so how should I know how these are implemented? */
427	/* my bold guess is as a simple, plain sub... */
428	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
429	}
430	#endif
431	}	420	}
432		421
433	if (top_si->si_type == PERLSI_MAIN)	422	if (top_si->si_type == PERLSI_MAIN)
434	break;	423	break;
435		424
…		…
439	}	428	}
440		429
441	PUTBACK;	430	PUTBACK;
442	}	431	}
443		432
444	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	433	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
445	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	434	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
446	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	435	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		436	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		437	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
447		438
448	c->dowarn = PL_dowarn;	439	#define VAR(name,type)c->name = PL_ ## name;
449	c->in_eval = PL_in_eval;	440	# include "state.h"
450		441	#undef VAR
451	c->curstackinfo = PL_curstackinfo;
452	c->curstack = PL_curstack;
453	c->mainstack = PL_mainstack;
454	c->stack_sp = PL_stack_sp;
455	c->op = PL_op;
456	c->curpad = PL_curpad;
457	c->comppad = PL_comppad;
458	c->compcv = PL_compcv;
459	c->stack_base = PL_stack_base;
460	c->stack_max = PL_stack_max;
461	c->tmps_stack = PL_tmps_stack;
462	c->tmps_floor = PL_tmps_floor;
463	c->tmps_ix = PL_tmps_ix;
464	c->tmps_max = PL_tmps_max;
465	c->markstack = PL_markstack;
466	c->markstack_ptr = PL_markstack_ptr;
467	c->markstack_max = PL_markstack_max;
468	c->scopestack = PL_scopestack;
469	c->scopestack_ix = PL_scopestack_ix;
470	c->scopestack_max = PL_scopestack_max;
471	c->savestack = PL_savestack;
472	c->savestack_ix = PL_savestack_ix;
473	c->savestack_max = PL_savestack_max;
474	c->retstack = PL_retstack;
475	c->retstack_ix = PL_retstack_ix;
476	c->retstack_max = PL_retstack_max;
477	c->curcop = PL_curcop;
478	c->top_env = PL_top_env;
479	}	442	}
480		443
481	/*	444	/*
482	* allocate various perl stacks. This is an exact copy	445	* allocate various perl stacks. This is an exact copy
483	* of perl.c:init_stacks, except that it uses less memory	446	* of perl.c:init_stacks, except that it uses less memory
484	* on the (sometimes correct) assumption that coroutines do	447	* on the (sometimes correct) assumption that coroutines do
485	* not usually need a lot of stackspace.	448	* not usually need a lot of stackspace.
486	*/	449	*/
487	STATIC void	450	#if CORO_PREFER_PERL_FUNCTIONS
		451	# define coro_init_stacks init_stacks
		452	#else
		453	static void
488	coro_init_stacks (pTHX)	454	coro_init_stacks (pTHX)
489	{	455	{
490	LOCK;
491
492	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	456	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
493	PL_curstackinfo->si_type = PERLSI_MAIN;	457	PL_curstackinfo->si_type = PERLSI_MAIN;
494	PL_curstack = PL_curstackinfo->si_stack;	458	PL_curstack = PL_curstackinfo->si_stack;
495	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	459	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496		460
497	PL_stack_base = AvARRAY(PL_curstack);	461	PL_stack_base = AvARRAY(PL_curstack);
498	PL_stack_sp = PL_stack_base;	462	PL_stack_sp = PL_stack_base;
499	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	463	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
500		464
501	New(50,PL_tmps_stack,96,SV*);	465	New(50,PL_tmps_stack,128,SV*);
502	PL_tmps_floor = -1;	466	PL_tmps_floor = -1;
503	PL_tmps_ix = -1;	467	PL_tmps_ix = -1;
504	PL_tmps_max = 96;	468	PL_tmps_max = 128;
505		469
506	New(54,PL_markstack,16,I32);	470	New(54,PL_markstack,32,I32);
507	PL_markstack_ptr = PL_markstack;	471	PL_markstack_ptr = PL_markstack;
508	PL_markstack_max = PL_markstack + 16;	472	PL_markstack_max = PL_markstack + 32;
509		473
510	#ifdef SET_MARK_OFFSET	474	#ifdef SET_MARK_OFFSET
511	SET_MARK_OFFSET;	475	SET_MARK_OFFSET;
512	#endif	476	#endif
513		477
514	New(54,PL_scopestack,16,I32);	478	New(54,PL_scopestack,32,I32);
515	PL_scopestack_ix = 0;	479	PL_scopestack_ix = 0;
516	PL_scopestack_max = 16;	480	PL_scopestack_max = 32;
517		481
518	New(54,PL_savestack,96,ANY);	482	New(54,PL_savestack,64,ANY);
519	PL_savestack_ix = 0;	483	PL_savestack_ix = 0;
520	PL_savestack_max = 96;	484	PL_savestack_max = 64;
521		485
		486	#if !PERL_VERSION_ATLEAST (5,9,0)
522	New(54,PL_retstack,8,OP*);	487	New(54,PL_retstack,16,OP*);
523	PL_retstack_ix = 0;	488	PL_retstack_ix = 0;
524	PL_retstack_max = 8;	489	PL_retstack_max = 16;
525		490	#endif
526	UNLOCK;
527	}	491	}
		492	#endif
528		493
529	/*	494	/*
530	* destroy the stacks, the callchain etc...	495	* destroy the stacks, the callchain etc...
531	*/	496	*/
532	STATIC void	497	static void
533	destroy_stacks(pTHX)	498	coro_destroy_stacks (pTHX)
534	{	499	{
535	if (!IN_DESTRUCT)	500	if (!IN_DESTRUCT)
536	{	501	{
537	/* is this ugly, I ask? */	502	/* restore all saved variables and stuff */
538	LEAVE_SCOPE (0);	503	LEAVE_SCOPE (0);
		504	assert (PL_tmps_floor == -1);
539		505
540	/* sure it is, but more important: is it correct?? :/ */	506	/* free all temporaries */
541	FREETMPS;	507	FREETMPS;
		508	assert (PL_tmps_ix == -1);
542		509
		510	/* unwind all extra stacks */
543	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	511	POPSTACK_TO (PL_mainstack);
		512
		513	/* unwind main stack */
		514	dounwind (-1);
544	}	515	}
545		516
546	while (PL_curstackinfo->si_next)	517	while (PL_curstackinfo->si_next)
547	PL_curstackinfo = PL_curstackinfo->si_next;	518	PL_curstackinfo = PL_curstackinfo->si_next;
548		519
549	while (PL_curstackinfo)	520	while (PL_curstackinfo)
550	{	521	{
551	PERL_SI *p = PL_curstackinfo->si_prev;	522	PERL_SI *p = PL_curstackinfo->si_prev;
552		523
553	{ /*D*//*remove*/
554	dSP;
555	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
556	PUTBACK; /* possibly superfluous */
557	}
558
559	if (!IN_DESTRUCT)	524	if (!IN_DESTRUCT)
560	{
561	dounwind (-1);/*D*//*remove*/
562	SvREFCNT_dec (PL_curstackinfo->si_stack);	525	SvREFCNT_dec (PL_curstackinfo->si_stack);
563	}
564		526
565	Safefree (PL_curstackinfo->si_cxstack);	527	Safefree (PL_curstackinfo->si_cxstack);
566	Safefree (PL_curstackinfo);	528	Safefree (PL_curstackinfo);
567	PL_curstackinfo = p;	529	PL_curstackinfo = p;
568	}	530	}
569		531
570	Safefree (PL_tmps_stack);	532	Safefree (PL_tmps_stack);
571	Safefree (PL_markstack);	533	Safefree (PL_markstack);
572	Safefree (PL_scopestack);	534	Safefree (PL_scopestack);
573	Safefree (PL_savestack);	535	Safefree (PL_savestack);
		536	#if !PERL_VERSION_ATLEAST (5,9,0)
574	Safefree (PL_retstack);	537	Safefree (PL_retstack);
575	}
576
577	static void
578	allocate_stack (Coro__State ctx, int alloc)
579	{
580	coro_stack *stack;
581
582	New (0, stack, 1, coro_stack);
583
584	stack->refcnt = 1;
585	stack->usecnt = 1;
586	stack->gencnt = ctx->gencnt = 0;
587
588	if (alloc)
589	{
590	#if HAVE_MMAP
591	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
592	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
593	if (stack->sptr == (void *)-1)
594	#endif	538	#endif
595	{
596	/*FIXME*//*D*//* reasonable stack size! */
597	stack->ssize = - (8192 * sizeof (long));
598	New (0, stack->sptr, 8192, long);
599	}
600	}
601	else
602	stack->sptr = 0;
603
604	ctx->stack = stack;
605	}	539	}
606		540
607	static void	541	/** coroutine stack handling ************************************************/
608	deallocate_stack (Coro__State ctx)
609	{
610	coro_stack *stack = ctx->stack;
611		542
612	ctx->stack = 0;
613
614	if (stack)
615	{
616	if (!--stack->refcnt)
617	{
618	#ifdef HAVE_MMAP
619	if (stack->ssize > 0 && stack->sptr)
620	munmap (stack->sptr, stack->ssize);
621	else
622	#endif
623	Safefree (stack->sptr);
624
625	Safefree (stack);
626	}
627	else if (ctx->gencnt == stack->gencnt)
628	--stack->usecnt;
629	}
630	}
631
632	static void	543	static void
633	setup_coro (void *arg)	544	setup_coro (pTHX_ struct coro *coro)
634	{	545	{
635	/*	546	/*
636	* emulate part of the perl startup here.	547	* emulate part of the perl startup here.
637	*/	548	*/
		549	coro_init_stacks (aTHX);
		550
		551	PL_curcop = &PL_compiling;
		552	PL_in_eval = EVAL_NULL;
		553	PL_comppad = 0;
		554	PL_curpm = 0;
		555	PL_localizing = 0;
		556	PL_dirty = 0;
		557	PL_restartop = 0;
		558
		559	{
		560	dSP;
		561	LOGOP myop;
		562
		563	SvREFCNT_dec (GvAV (PL_defgv));
		564	GvAV (PL_defgv) = coro->args; coro->args = 0;
		565
		566	Zero (&myop, 1, LOGOP);
		567	myop.op_next = Nullop;
		568	myop.op_flags = OPf_WANT_VOID;
		569
		570	PUSHMARK (SP);
		571	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		572	PUTBACK;
		573	PL_op = (OP *)&myop;
		574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		575	SPAGAIN;
		576	}
		577
		578	ENTER; /* necessary e.g. for dounwind */
		579	}
		580
		581	static void
		582	free_coro_mortal (pTHX)
		583	{
		584	if (coro_mortal)
		585	{
		586	SvREFCNT_dec (coro_mortal);
		587	coro_mortal = 0;
		588	}
		589	}
		590
		591	/* inject a fake call to Coro::State::_cctx_init into the execution */
		592	static void NOINLINE
		593	prepare_cctx (pTHX_ coro_cctx *cctx)
		594	{
		595	dSP;
		596	LOGOP myop;
		597
		598	Zero (&myop, 1, LOGOP);
		599	myop.op_next = PL_op;
		600	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		601
		602	PUSHMARK (SP);
		603	EXTEND (SP, 2);
		604	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		605	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		606	PUTBACK;
		607	PL_op = (OP *)&myop;
		608	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		609	SPAGAIN;
		610	}
		611
		612	static void
		613	coro_run (void *arg)
		614	{
638	dTHX;	615	dTHX;
639	dSP;
640	Coro__State ctx = (Coro__State)arg;
641	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
642		616
643	coro_init_stacks (aTHX);	617	/* coro_run is the alternative tail of transfer(), so unlock here. */
644	/*PL_curcop = 0;*/	618	UNLOCK;
645	/*PL_in_eval = PL_in_eval;*/ /* inherit */
646	SvREFCNT_dec (GvAV (PL_defgv));
647	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
648		619
649	SPAGAIN;
650
651	if (ctx->stack)
652	{
653	ctx->cursp = 0;
654
655	PUSHMARK(SP);
656	PUTBACK;
657	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
658
659	if (SvTRUE (ERRSV))
660	croak (NULL);
661	else
662	croak ("FATAL: CCTXT coroutine returned!");
663	}
664	else
665	{
666	UNOP myop;
667
668	PL_op = (OP *)&myop;
669
670	Zero(&myop, 1, UNOP);
671	myop.op_next = Nullop;
672	myop.op_flags = OPf_WANT_VOID;
673
674	PUSHMARK(SP);
675	XPUSHs (sub_init);
676	/*
677	* the next line is slightly wrong, as PL_op->op_next
678	* is actually being executed so we skip the first op.
679	* that doesn't matter, though, since it is only
680	* pp_nextstate and we never return...
681	* ah yes, and I don't care anyways ;)
682	*/
683	PUTBACK;
684	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685	SPAGAIN;
686
687	ENTER; /* necessary e.g. for dounwind */
688	}
689	}
690
691	static void
692	continue_coro (void *arg)
693	{
694	/*	620	/*
695	* this is a _very_ stripped down perl interpreter ;)	621	* this is a _very_ stripped down perl interpreter ;)
696	*/	622	*/
697	dTHX;
698	Coro__State ctx = (Coro__State)arg;
699	JMPENV coro_start_env;
700
701	PL_top_env = &ctx->start_env;	623	PL_top_env = &PL_start_env;
702		624
703	ctx->cursp = 0;	625	/* inject call to cctx_init */
		626	prepare_cctx (aTHX_ (coro_cctx *)arg);
		627
		628	/* somebody will hit me for both perl_run and PL_restartop */
		629	PL_restartop = PL_op;
		630	perl_run (PL_curinterp);
		631
		632	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		633	abort ();
		634	}
		635
		636	static coro_cctx *
		637	cctx_new ()
		638	{
		639	coro_cctx *cctx;
		640	void *stack_start;
		641	size_t stack_size;
		642
		643	++cctx_count;
		644
		645	Newz (0, cctx, 1, coro_cctx);
		646
		647	#if HAVE_MMAP
		648
		649	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		650	/* mmap supposedly does allocate-on-write for us */
		651	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		652
		653	if (cctx->sptr != (void *)-1)
		654	{
		655	# if CORO_STACKGUARD
		656	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		657	# endif
		658	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		659	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		660	cctx->mapped = 1;
		661	}
		662	else
		663	#endif
		664	{
		665	cctx->ssize = coro_stacksize * (long)sizeof (long);
		666	New (0, cctx->sptr, coro_stacksize, long);
		667
		668	if (!cctx->sptr)
		669	{
		670	perror ("FATAL: unable to allocate stack for coroutine");
		671	_exit (EXIT_FAILURE);
		672	}
		673
		674	stack_start = cctx->sptr;
		675	stack_size = cctx->ssize;
		676	}
		677
		678	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		679	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		680
		681	return cctx;
		682	}
		683
		684	static void
		685	cctx_destroy (coro_cctx *cctx)
		686	{
		687	if (!cctx)
		688	return;
		689
		690	--cctx_count;
		691
		692	#if CORO_USE_VALGRIND
		693	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		694	#endif
		695
		696	#if HAVE_MMAP
		697	if (cctx->mapped)
		698	munmap (cctx->sptr, cctx->ssize);
		699	else
		700	#endif
		701	Safefree (cctx->sptr);
		702
		703	Safefree (cctx);
		704	}
		705
		706	static coro_cctx *
		707	cctx_get (pTHX)
		708	{
		709	while (cctx_first)
		710	{
		711	coro_cctx *cctx = cctx_first;
		712	cctx_first = cctx->next;
		713	--cctx_idle;
		714
		715	if (cctx->ssize >= coro_stacksize)
		716	return cctx;
		717
		718	cctx_destroy (cctx);
		719	}
		720
704	PL_op = PL_op->op_next;	721	PL_op = PL_op->op_next;
705	CALLRUNOPS(aTHX);	722	return cctx_new ();
706
707	abort ();
708	}	723	}
709		724
710	STATIC void	725	static void
		726	cctx_put (coro_cctx *cctx)
		727	{
		728	/* free another cctx if overlimit */
		729	if (cctx_idle >= MAX_IDLE_CCTX)
		730	{
		731	coro_cctx *first = cctx_first;
		732	cctx_first = first->next;
		733	--cctx_idle;
		734
		735	assert (!first->inuse);
		736	cctx_destroy (first);
		737	}
		738
		739	++cctx_idle;
		740	cctx->next = cctx_first;
		741	cctx_first = cctx;
		742	}
		743
		744	/** coroutine switching *****************************************************/
		745
		746	/* never call directly, always through the coro_state_transfer global variable */
		747	static void NOINLINE
711	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	748	transfer (pTHX_ struct coro *prev, struct coro *next)
712	{	749	{
713	dSTACKLEVEL;	750	dSTACKLEVEL;
714		751
		752	/* sometimes transfer is only called to set idle_sp */
		753	if (!next)
		754	{
		755	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		756	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		757	}
715	if (prev != next)	758	else if (prev != next)
716	{	759	{
717	if (next->mainstack)	760	coro_cctx *prev__cctx;
		761
		762	if (prev->flags & CF_NEW)
718	{	763	{
719	LOCK;	764	/* create a new empty context */
720	SAVE (prev, flags);	765	Newz (0, prev->cctx, 1, coro_cctx);
721	LOAD (next);	766	prev->cctx->inuse = 1;
722	UNLOCK;	767	prev->flags &= ~CF_NEW;
723		768	prev->flags |= CF_RUNNING;
724	/* mark this state as in-use */
725	next->mainstack = 0;
726	next->tmps_ix = -2;
727
728	/* stacklevel changed? if yes, grab the stack for us! */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733	else if (prev->cursp != stacklevel
734	&& prev->stack->usecnt > 1)
735	{
736	prev->gencnt = ++prev->stack->gencnt;
737	prev->stack->usecnt = 1;
738	}
739
740	/* has our stack been invalidated? */
741	if (next->stack && next->stack->gencnt != next->gencnt)
742	{
743	deallocate_stack (next);
744	allocate_stack (next, 1);
745	coro_create (&(next->stack->cctx),
746	continue_coro, (void *)next,
747	next->stack->sptr, labs (next->stack->ssize));
748	}
749
750	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751	prev->cursp = stacklevel;
752	/* don't add any code here */
753	}
754	else
755	next->cursp = stacklevel;
756	}	769	}
757	else if (next->tmps_ix == -2)	770
758	croak ("tried to transfer to running coroutine");	771	/*TODO: must not croak here */
		772	if (!prev->flags & CF_RUNNING)
		773	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		774
		775	if (next->flags & CF_RUNNING)
		776	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		777
		778	if (next->flags & CF_DESTROYED)
		779	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		780
		781	prev->flags &= ~CF_RUNNING;
		782	next->flags |= CF_RUNNING;
		783
		784	LOCK;
		785
		786	if (next->flags & CF_NEW)
		787	{
		788	/* need to start coroutine */
		789	next->flags &= ~CF_NEW;
		790	/* first get rid of the old state */
		791	save_perl (aTHX_ prev);
		792	/* setup coroutine call */
		793	setup_coro (aTHX_ next);
		794	/* need a new stack */
		795	assert (!next->cctx);
		796	}
759	else	797	else
760	{	798	{
761	LOCK;	799	/* coroutine already started */
762	SAVE (prev, -1); /* first get rid of the old state */	800	save_perl (aTHX_ prev);
763	UNLOCK;	801	load_perl (aTHX_ next);
764
765	if (flags & TRANSFER_SAVE_CCTXT)
766	{
767	if (!prev->stack)
768	allocate_stack (prev, 0);
769
770	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
771	{
772	PL_top_env = &next->start_env;
773
774	setup_coro (next);
775	next->cursp = stacklevel;
776
777	prev->stack->refcnt++;
778	prev->stack->usecnt++;
779	next->stack = prev->stack;
780	next->gencnt = prev->gencnt;
781	}
782	else
783	{
784	assert (!next->stack);
785	allocate_stack (next, 1);
786	coro_create (&(next->stack->cctx),
787	setup_coro, (void *)next,
788	next->stack->sptr, labs (next->stack->ssize));
789	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
790	prev->cursp = stacklevel;
791	/* don't add any code here */
792	}
793	}
794	else
795	{
796	setup_coro (next);
797	next->cursp = stacklevel;
798	}
799	}	802	}
800	}
801		803
802	LOCK;	804	prev__cctx = prev->cctx;
803	if (coro_mortal)	805
804	{	806	/* possibly "free" the cctx */
805	SvREFCNT_dec (coro_mortal);	807	if (prev__cctx->idle_sp == STACKLEVEL)
806	coro_mortal = 0;	808	{
807	}	809	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		810	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		811
		812	prev->cctx = 0;
		813
		814	cctx_put (prev__cctx);
		815	prev__cctx->inuse = 0;
		816	}
		817
		818	if (!next->cctx)
		819	{
		820	next->cctx = cctx_get (aTHX);
		821	assert (!next->cctx->inuse);
		822	next->cctx->inuse = 1;
		823	}
		824
		825	if (prev__cctx != next->cctx)
		826	{
		827	prev__cctx->top_env = PL_top_env;
		828	PL_top_env = next->cctx->top_env;
		829	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		830	}
		831
		832	free_coro_mortal (aTHX);
808	UNLOCK;	833	UNLOCK;
		834	}
809	}	835	}
810		836
811	#define SV_CORO(sv,func) \	837	struct transfer_args
812	do { \	838	{
813	if (SvROK (sv)) \	839	struct coro *prev, *next;
814	sv = SvRV (sv); \	840	};
815	\
816	if (SvTYPE (sv) == SVt_PVHV) \
817	{ \
818	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
819	\
820	if (!he) \
821	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
822	\
823	(sv) = SvRV (HeVAL(he)); \
824	} \
825	\
826	/* must also be changed inside Coro::Cont::yield */ \
827	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
828	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
829	\
830	} while(0)
831		841
832	#define SvSTATE(sv) (struct coro *)SvIV (sv)	842	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
833		843
		844	/** high level stuff ********************************************************/
		845
834	static void	846	static int
		847	coro_state_destroy (pTHX_ struct coro *coro)
		848	{
		849	if (coro->flags & CF_DESTROYED)
		850	return 0;
		851
		852	coro->flags |= CF_DESTROYED;
		853
		854	if (coro->flags & CF_READY)
		855	{
		856	/* reduce nready, as destroying a ready coro effectively unreadies it */
		857	/* alternative: look through all ready queues and remove the coro */
		858	LOCK;
		859	--coro_nready;
		860	UNLOCK;
		861	}
		862	else
		863	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		864
		865	if (coro->mainstack && coro->mainstack != main_mainstack)
		866	{
		867	struct coro temp;
		868
		869	assert (!(coro->flags & CF_RUNNING));
		870
		871	Zero (&temp, 1, struct coro);
		872	temp.save = CORO_SAVE_DEF;
		873
		874	if (coro->flags & CF_RUNNING)
		875	croak ("FATAL: tried to destroy currently running coroutine");
		876
		877	save_perl (aTHX_ &temp);
		878	load_perl (aTHX_ coro);
		879
		880	coro_destroy_stacks (aTHX);
		881
		882	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		883
		884	coro->mainstack = 0;
		885	}
		886
		887	cctx_destroy (coro->cctx);
		888	SvREFCNT_dec (coro->args);
		889
		890	return 1;
		891	}
		892
		893	static int
		894	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		895	{
		896	struct coro *coro = (struct coro *)mg->mg_ptr;
		897	mg->mg_ptr = 0;
		898
		899	if (--coro->refcnt < 0)
		900	{
		901	coro_state_destroy (aTHX_ coro);
		902	Safefree (coro);
		903	}
		904
		905	return 0;
		906	}
		907
		908	static int
		909	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		910	{
		911	struct coro *coro = (struct coro *)mg->mg_ptr;
		912
		913	++coro->refcnt;
		914
		915	return 0;
		916	}
		917
		918	static MGVTBL coro_state_vtbl = {
		919	0, 0, 0, 0,
		920	coro_state_free,
		921	0,
		922	#ifdef MGf_DUP
		923	coro_state_dup,
		924	#else
		925	# define MGf_DUP 0
		926	#endif
		927	};
		928
		929	static struct coro *
		930	SvSTATE_ (pTHX_ SV *coro)
		931	{
		932	HV *stash;
		933	MAGIC *mg;
		934
		935	if (SvROK (coro))
		936	coro = SvRV (coro);
		937
		938	stash = SvSTASH (coro);
		939	if (stash != coro_stash && stash != coro_state_stash)
		940	{
		941	/* very slow, but rare, check */
		942	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		943	croak ("Coro::State object required");
		944	}
		945
		946	mg = CORO_MAGIC (coro);
		947	return (struct coro *)mg->mg_ptr;
		948	}
		949
		950	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		951
		952	static void
		953	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		954	{
		955	ta->prev = SvSTATE (prev_sv);
		956	ta->next = SvSTATE (next_sv);
		957	}
		958
		959	static void
835	api_transfer(pTHX_ SV *prev, SV *next, int flags)	960	api_transfer (SV *prev_sv, SV *next_sv)
836	{	961	{
837	SV_CORO (prev, "Coro::transfer");	962	dTHX;
838	SV_CORO (next, "Coro::transfer");	963	struct transfer_args ta;
839		964
840	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	965	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		966	TRANSFER (ta);
		967	}
		968
		969	static int
		970	api_save (SV *coro_sv, int new_save)
		971	{
		972	dTHX;
		973	struct coro *coro = SvSTATE (coro_sv);
		974	int old_save = coro->save;
		975
		976	if (new_save >= 0)
		977	coro->save = new_save;
		978
		979	return old_save;
841	}	980	}
842		981
843	/** Coro ********************************************************************/	982	/** Coro ********************************************************************/
844		983
845	#define PRIO_MAX 3
846	#define PRIO_HIGH 1
847	#define PRIO_NORMAL 0
848	#define PRIO_LOW -1
849	#define PRIO_IDLE -3
850	#define PRIO_MIN -4
851
852	/* for Coro.pm */
853	static GV *coro_current, *coro_idle;
854	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
855	static int coro_nready;
856
857	static void	984	static void
858	coro_enq (pTHX_ SV *sv)	985	coro_enq (pTHX_ SV *coro_sv)
859	{	986	{
860	if (SvTYPE (sv) == SVt_PVHV)
861	{
862	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
863	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
864
865	prio = prio > PRIO_MAX ? PRIO_MAX
866	: prio < PRIO_MIN ? PRIO_MIN
867	: prio;
868
869	av_push (coro_ready [prio - PRIO_MIN], sv);	987	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
870	coro_nready++;
871
872	return;
873	}
874
875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
876	}	988	}
877		989
878	static SV *	990	static SV *
879	coro_deq (pTHX_ int min_prio)	991	coro_deq (pTHX_ int min_prio)
880	{	992	{
…		…
883	min_prio -= PRIO_MIN;	995	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	996	if (min_prio < 0)
885	min_prio = 0;	997	min_prio = 0;
886		998
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	999	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (av_len (coro_ready[prio]) >= 0)	1000	if (AvFILLp (coro_ready [prio]) >= 0)
889	{
890	coro_nready--;
891	return av_shift (coro_ready[prio]);	1001	return av_shift (coro_ready [prio]);
892	}
893		1002
894	return 0;	1003	return 0;
895	}	1004	}
896		1005
897	static void	1006	static int
898	api_ready (SV *coro)	1007	api_ready (SV *coro_sv)
899	{	1008	{
900	dTHX;	1009	dTHX;
		1010	struct coro *coro;
901		1011
902	if (SvROK (coro))	1012	if (SvROK (coro_sv))
903	coro = SvRV (coro);	1013	coro_sv = SvRV (coro_sv);
		1014
		1015	coro = SvSTATE (coro_sv);
		1016
		1017	if (coro->flags & CF_READY)
		1018	return 0;
		1019
		1020	coro->flags |= CF_READY;
904		1021
905	LOCK;	1022	LOCK;
906	coro_enq (aTHX_ SvREFCNT_inc (coro));	1023	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1024	++coro_nready;
907	UNLOCK;	1025	UNLOCK;
		1026
		1027	return 1;
		1028	}
		1029
		1030	static int
		1031	api_is_ready (SV *coro_sv)
		1032	{
		1033	dTHX;
		1034	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1035	}
		1036
		1037	static void
		1038	prepare_schedule (pTHX_ struct transfer_args *ta)
		1039	{
		1040	SV *prev_sv, *next_sv;
		1041
		1042	for (;;)
		1043	{
		1044	LOCK;
		1045	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1046
		1047	/* nothing to schedule: call the idle handler */
		1048	if (!next_sv)
		1049	{
		1050	dSP;
		1051	UNLOCK;
		1052
		1053	ENTER;
		1054	SAVETMPS;
		1055
		1056	PUSHMARK (SP);
		1057	PUTBACK;
		1058	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1059
		1060	FREETMPS;
		1061	LEAVE;
		1062	continue;
		1063	}
		1064
		1065	ta->next = SvSTATE (next_sv);
		1066
		1067	/* cannot transfer to destroyed coros, skip and look for next */
		1068	if (ta->next->flags & CF_DESTROYED)
		1069	{
		1070	UNLOCK;
		1071	SvREFCNT_dec (next_sv);
		1072	/* coro_nready is already taken care of by destroy */
		1073	continue;
		1074	}
		1075
		1076	--coro_nready;
		1077	UNLOCK;
		1078	break;
		1079	}
		1080
		1081	/* free this only after the transfer */
		1082	prev_sv = SvRV (coro_current);
		1083	SvRV_set (coro_current, next_sv);
		1084	ta->prev = SvSTATE (prev_sv);
		1085
		1086	assert (ta->next->flags & CF_READY);
		1087	ta->next->flags &= ~CF_READY;
		1088
		1089	LOCK;
		1090	free_coro_mortal (aTHX);
		1091	coro_mortal = prev_sv;
		1092	UNLOCK;
		1093	}
		1094
		1095	static void
		1096	prepare_cede (pTHX_ struct transfer_args *ta)
		1097	{
		1098	api_ready (coro_current);
		1099	prepare_schedule (aTHX_ ta);
		1100	}
		1101
		1102	static int
		1103	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1104	{
		1105	if (coro_nready)
		1106	{
		1107	SV *prev = SvRV (coro_current);
		1108	prepare_schedule (aTHX_ ta);
		1109	api_ready (prev);
		1110	return 1;
		1111	}
		1112	else
		1113	return 0;
908	}	1114	}
909		1115
910	static void	1116	static void
911	api_schedule (void)	1117	api_schedule (void)
912	{	1118	{
913	dTHX;	1119	dTHX;
		1120	struct transfer_args ta;
914		1121
915	SV *prev, *next;	1122	prepare_schedule (aTHX_ &ta);
916		1123	TRANSFER (ta);
917	LOCK;
918
919	prev = SvRV (GvSV (coro_current));
920	next = coro_deq (aTHX_ PRIO_MIN);
921
922	if (!next)
923	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
924
925	/* free this only after the transfer */
926	coro_mortal = prev;
927	SV_CORO (prev, "Coro::schedule");
928
929	SvRV (GvSV (coro_current)) = next;
930
931	SV_CORO (next, "Coro::schedule");
932
933	UNLOCK;
934
935	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
936	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
937	}	1124	}
938		1125
939	static void	1126	static int
940	api_cede (void)	1127	api_cede (void)
941	{	1128	{
942	dTHX;	1129	dTHX;
		1130	struct transfer_args ta;
943		1131
944	LOCK;	1132	prepare_cede (aTHX_ &ta);
945	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
946	UNLOCK;
947		1133
948	api_schedule ();	1134	if (ta.prev != ta.next)
		1135	{
		1136	TRANSFER (ta);
		1137	return 1;
		1138	}
		1139	else
		1140	return 0;
		1141	}
		1142
		1143	static int
		1144	api_cede_notself (void)
		1145	{
		1146	dTHX;
		1147	struct transfer_args ta;
		1148
		1149	if (prepare_cede_notself (aTHX_ &ta))
		1150	{
		1151	TRANSFER (ta);
		1152	return 1;
		1153	}
		1154	else
		1155	return 0;
949	}	1156	}
950		1157
951	MODULE = Coro::State PACKAGE = Coro::State	1158	MODULE = Coro::State PACKAGE = Coro::State
952		1159
953	PROTOTYPES: ENABLE	1160	PROTOTYPES: DISABLE
954		1161
955	BOOT:	1162	BOOT:
956	{ /* {} necessary for stoopid perl-5.6.x */	1163	{
957	#ifdef USE_ITHREADS	1164	#ifdef USE_ITHREADS
958	MUTEX_INIT (&coro_mutex);	1165	MUTEX_INIT (&coro_mutex);
959	#endif	1166	#endif
		1167	BOOT_PAGESIZE;
960		1168
961	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
962	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
963	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1169	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964		1170
965	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1171	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
966	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1172	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
967	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1173	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1174	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1175	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
968	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1176	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1177	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
969		1178
970	main_mainstack = PL_mainstack;	1179	main_mainstack = PL_mainstack;
971		1180
972	coroapi.ver = CORO_API_VERSION;	1181	coroapi.ver = CORO_API_VERSION;
973	coroapi.transfer = api_transfer;	1182	coroapi.transfer = api_transfer;
974	}
975		1183
976	Coro::State	1184	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
977	_newprocess(args)	1185	}
978	SV * args	1186
979	PROTOTYPE: $	1187	SV *
		1188	new (char *klass, ...)
980	CODE:	1189	CODE:
981	Coro__State coro;	1190	{
		1191	struct coro *coro;
		1192	HV *hv;
		1193	int i;
982		1194
983	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
984	croak ("Coro::State::_newprocess expects an arrayref");
985
986	Newz (0, coro, 1, struct coro);	1195	Newz (0, coro, 1, struct coro);
		1196	coro->args = newAV ();
		1197	coro->save = CORO_SAVE_DEF;
		1198	coro->flags = CF_NEW;
987		1199
988	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1200	hv = newHV ();
989	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1201	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
990	/*coro->stack = 0;*/	1202	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
991		1203
992	/* same as JMPENV_BOOTSTRAP */	1204	for (i = 1; i < items; i++)
993	/* we might be able to recycle start_env, but safe is safe */	1205	av_push (coro->args, newSVsv (ST (i)));
994	/*Zero(&coro->start_env, 1, JMPENV);*/	1206	}
995	coro->start_env.je_ret = -1;
996	coro->start_env.je_mustcatch = TRUE;
997
998	RETVAL = coro;
999	OUTPUT:	1207	OUTPUT:
1000	RETVAL	1208	RETVAL
1001		1209
		1210	int
		1211	save (SV *coro, int new_save = -1)
		1212	CODE:
		1213	RETVAL = api_save (coro, new_save);
		1214	OUTPUT:
		1215	RETVAL
		1216
		1217	int
		1218	save_also (SV *coro_sv, int save_also)
		1219	CODE:
		1220	{
		1221	struct coro *coro = SvSTATE (coro_sv);
		1222	RETVAL = coro->save;
		1223	coro->save |= save_also;
		1224	}
		1225	OUTPUT:
		1226	RETVAL
		1227
1002	void	1228	void
1003	transfer(prev, next, flags)	1229	_set_stacklevel (...)
1004	SV *prev	1230	ALIAS:
1005	SV *next	1231	Coro::State::transfer = 1
1006	int flags	1232	Coro::schedule = 2
1007	PROTOTYPE: @	1233	Coro::cede = 3
		1234	Coro::cede_notself = 4
1008	CODE:	1235	CODE:
1009	PUTBACK;	1236	{
1010	SV_CORO (next, "Coro::transfer");	1237	struct transfer_args ta;
1011	SV_CORO (prev, "Coro::transfer");	1238
1012	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1239	switch (ix)
1013	SPAGAIN;	1240	{
		1241	case 0:
		1242	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1243	ta.next = 0;
		1244	break;
		1245
		1246	case 1:
		1247	if (items != 2)
		1248	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1249
		1250	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1251	break;
		1252
		1253	case 2:
		1254	prepare_schedule (aTHX_ &ta);
		1255	break;
		1256
		1257	case 3:
		1258	prepare_cede (aTHX_ &ta);
		1259	break;
		1260
		1261	case 4:
		1262	if (!prepare_cede_notself (aTHX_ &ta))
		1263	XSRETURN_EMPTY;
		1264
		1265	break;
		1266	}
		1267
		1268	BARRIER;
		1269	TRANSFER (ta);
		1270
		1271	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1272	XSRETURN_YES;
		1273	}
		1274
		1275	bool
		1276	_destroy (SV *coro_sv)
		1277	CODE:
		1278	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1279	OUTPUT:
		1280	RETVAL
1014		1281
1015	void	1282	void
1016	DESTROY(coro)
1017	Coro::State coro
1018	CODE:
1019
1020	if (coro->mainstack && coro->mainstack != main_mainstack)
1021	{
1022	struct coro temp;
1023
1024	PUTBACK;
1025	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1026	LOAD (aTHX_ coro);
1027	SPAGAIN;
1028
1029	destroy_stacks (aTHX);
1030
1031	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1032	SPAGAIN;
1033
1034	coro->mainstack = 0;
1035	}
1036
1037	deallocate_stack (coro);
1038	SvREFCNT_dec (coro->args);
1039	Safefree (coro);
1040
1041	void
1042	_exit(code)	1283	_exit (code)
1043	int code	1284	int code
1044	PROTOTYPE: $	1285	PROTOTYPE: $
1045	CODE:	1286	CODE:
1046	_exit (code);	1287	_exit (code);
1047		1288
1048	MODULE = Coro::State PACKAGE = Coro::Cont	1289	int
		1290	cctx_stacksize (int new_stacksize = 0)
		1291	CODE:
		1292	RETVAL = coro_stacksize;
		1293	if (new_stacksize)
		1294	coro_stacksize = new_stacksize;
		1295	OUTPUT:
		1296	RETVAL
1049		1297
1050	# this is slightly dirty (should expose a c-level api)	1298	int
		1299	cctx_count ()
		1300	CODE:
		1301	RETVAL = cctx_count;
		1302	OUTPUT:
		1303	RETVAL
1051		1304
1052	void	1305	int
1053	yield(...)	1306	cctx_idle ()
1054	PROTOTYPE: @	1307	CODE:
1055	CODE:	1308	RETVAL = cctx_idle;
1056	SV *yieldstack;	1309	OUTPUT:
1057	SV *sv;	1310	RETVAL
1058	AV *defav = GvAV (PL_defgv);
1059	struct coro *prev, *next;
1060
1061	yieldstack = *hv_fetch (
1062	(HV *)SvRV (GvSV (coro_current)),
1063	"yieldstack", sizeof ("yieldstack") - 1,
1064	0
1065	);
1066
1067	/* set up @_ -- ugly */
1068	av_clear (defav);
1069	av_fill (defav, items - 1);
1070	while (items--)
1071	av_store (defav, items, SvREFCNT_inc (ST(items)));
1072
1073	sv = av_pop ((AV *)SvRV (yieldstack));
1074	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1075	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1076	SvREFCNT_dec (sv);
1077
1078	transfer (aTHX_ prev, next, 0);
1079		1311
1080	MODULE = Coro::State PACKAGE = Coro	1312	MODULE = Coro::State PACKAGE = Coro
1081		1313
1082	# this is slightly dirty (should expose a c-level api)
1083
1084	BOOT:	1314	BOOT:
1085	{	1315	{
1086	int i;	1316	int i;
		1317
1087	HV *stash = gv_stashpv ("Coro", TRUE);	1318	coro_stash = gv_stashpv ("Coro", TRUE);
1088		1319
1089	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1320	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1090	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1321	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1091	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1322	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1092	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1323	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1093	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1324	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1094	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1325	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1095		1326
1096	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1327	coro_current = get_sv ("Coro::current", FALSE);
1097	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1328	SvREADONLY_on (coro_current);
1098		1329
1099	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1330	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1100	coro_ready[i] = newAV ();	1331	coro_ready[i] = newAV ();
1101		1332
1102	{	1333	{
1103	SV *sv = perl_get_sv("Coro::API", 1);	1334	SV *sv = perl_get_sv("Coro::API", 1);
1104		1335
1105	coroapi.schedule = api_schedule;	1336	coroapi.schedule = api_schedule;
		1337	coroapi.save = api_save;
1106	coroapi.cede = api_cede;	1338	coroapi.cede = api_cede;
		1339	coroapi.cede_notself = api_cede_notself;
1107	coroapi.ready = api_ready;	1340	coroapi.ready = api_ready;
		1341	coroapi.is_ready = api_is_ready;
1108	coroapi.nready = &coro_nready;	1342	coroapi.nready = &coro_nready;
1109	coroapi.current = coro_current;	1343	coroapi.current = coro_current;
1110		1344
1111	GCoroAPI = &coroapi;	1345	GCoroAPI = &coroapi;
1112	sv_setiv(sv, (IV)&coroapi);	1346	sv_setiv (sv, (IV)&coroapi);
1113	SvREADONLY_on(sv);	1347	SvREADONLY_on (sv);
1114	}	1348	}
1115	}	1349	}
1116		1350
1117	#if !PERL_MICRO
1118
1119	void	1351	void
1120	ready(self)	1352	_set_current (SV *current)
1121	SV * self
1122	PROTOTYPE: $	1353	PROTOTYPE: $
1123	CODE:	1354	CODE:
1124	api_ready (self);	1355	SvREFCNT_dec (SvRV (coro_current));
1125		1356	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1126	#endif
1127		1357
1128	int	1358	int
		1359	prio (Coro::State coro, int newprio = 0)
		1360	ALIAS:
		1361	nice = 1
		1362	CODE:
		1363	{
		1364	RETVAL = coro->prio;
		1365
		1366	if (items > 1)
		1367	{
		1368	if (ix)
		1369	newprio = coro->prio - newprio;
		1370
		1371	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1372	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1373
		1374	coro->prio = newprio;
		1375	}
		1376	}
		1377	OUTPUT:
		1378	RETVAL
		1379
		1380	SV *
		1381	ready (SV *self)
		1382	PROTOTYPE: $
		1383	CODE:
		1384	RETVAL = boolSV (api_ready (self));
		1385	OUTPUT:
		1386	RETVAL
		1387
		1388	SV *
		1389	is_ready (SV *self)
		1390	PROTOTYPE: $
		1391	CODE:
		1392	RETVAL = boolSV (api_is_ready (self));
		1393	OUTPUT:
		1394	RETVAL
		1395
		1396	int
1129	nready(...)	1397	nready (...)
1130	PROTOTYPE:	1398	PROTOTYPE:
1131	CODE:	1399	CODE:
1132	RETVAL = coro_nready;	1400	RETVAL = coro_nready;
1133	OUTPUT:	1401	OUTPUT:
1134	RETVAL	1402	RETVAL
1135		1403
		1404	MODULE = Coro::State PACKAGE = Coro::AIO
		1405
		1406	SV *
		1407	_get_state ()
		1408	CODE:
		1409	{
		1410	struct io_state *data;
		1411
		1412	RETVAL = newSV (sizeof (struct io_state));
		1413	data = (struct io_state *)SvPVX (RETVAL);
		1414	SvCUR_set (RETVAL, sizeof (struct io_state));
		1415	SvPOK_only (RETVAL);
		1416
		1417	data->errorno = errno;
		1418	data->laststype = PL_laststype;
		1419	data->laststatval = PL_laststatval;
		1420	data->statcache = PL_statcache;
		1421	}
		1422	OUTPUT:
		1423	RETVAL
		1424
1136	void	1425	void
1137	schedule(...)	1426	_set_state (char *data_)
1138	PROTOTYPE:	1427	PROTOTYPE: $
1139	CODE:	1428	CODE:
1140	api_schedule ();	1429	{
		1430	struct io_state *data = (void *)data_;
1141		1431
1142	void	1432	errno = data->errorno;
1143	cede(...)	1433	PL_laststype = data->laststype;
1144	PROTOTYPE:	1434	PL_laststatval = data->laststatval;
1145	CODE:	1435	PL_statcache = data->statcache;
1146	api_cede ();	1436	}
1147		1437

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