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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 1.158 by root, Fri Sep 21 02:23:48 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
48		83
49	/* The next macro should declare a variable stacklevel that contains and approximation	84	#ifndef CORO_STACKGUARD
50	* to the current C stack pointer. Its property is that it changes with each call	85	# define CORO_STACKGUARD 0
51	* 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
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
53		97
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		99
56	#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))
57		109
58	#include "CoroAPI.h"	110	#include "CoroAPI.h"
59		111
60	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
62	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
63	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
64	#else	116	#else
65	# define LOCK 0	117	# define LOCK (void)0
66	# define UNLOCK 0	118	# define UNLOCK (void)0
67	#endif	119	#endif
68		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;
69	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	132	static AV *main_mainstack; /* used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
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;
		192
		193	/* linked list */
		194	struct coro *next, *prev;
		195	HV *hv; /* the perl hash associated with this coro, if any */
138	};	196	};
139		197
140	typedef struct coro *Coro__State;	198	typedef struct coro *Coro__State;
141	typedef struct coro *Coro__State_or_hashref;	199	typedef struct coro *Coro__State_or_hashref;
142		200
143	/* mostly copied from op.c:cv_clone2 */	201	/** Coro ********************************************************************/
144	STATIC AV *	202
145	clone_padlist (pTHX_ AV *protopadlist)	203	#define PRIO_MAX 3
		204	#define PRIO_HIGH 1
		205	#define PRIO_NORMAL 0
		206	#define PRIO_LOW -1
		207	#define PRIO_IDLE -3
		208	#define PRIO_MIN -4
		209
		210	/* for Coro.pm */
		211	static SV *coro_current;
		212	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		213	static int coro_nready;
		214	static struct coro *coro_first;
		215
		216	/** lowlevel stuff **********************************************************/
		217
		218	static AV *
		219	coro_clone_padlist (pTHX_ CV *cv)
146	{	220	{
147	AV *av;	221	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;	222	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		223
166	newpadlist = newAV ();	224	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	225	AvREAL_off (newpadlist);
168	av_store (newpadlist, 0, (SV *) newpad_name);	226	#if PERL_VERSION_ATLEAST (5,9,0)
		227	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		228	#else
		229	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		230	#endif
		231	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		232	--AvFILLp (padlist);
		233
		234	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
169	av_store (newpadlist, 1, (SV *) newpad);	235	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		236
240	return newpadlist;	237	return newpadlist;
241	}	238	}
242		239
243	STATIC void	240	static void
244	free_padlist (pTHX_ AV *padlist)	241	free_padlist (pTHX_ AV *padlist)
245	{	242	{
246	/* may be during global destruction */	243	/* may be during global destruction */
247	if (SvREFCNT (padlist))	244	if (SvREFCNT (padlist))
248	{	245	{
…		…
262		259
263	SvREFCNT_dec ((SV*)padlist);	260	SvREFCNT_dec ((SV*)padlist);
264	}	261	}
265	}	262	}
266		263
267	STATIC int	264	static int
268	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	265	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
269	{	266	{
270	AV *padlist;	267	AV *padlist;
271	AV *av = (AV *)mg->mg_obj;	268	AV *av = (AV *)mg->mg_obj;
272		269
273	/* casting is fun. */	270	/* casting is fun. */
274	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	271	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275	free_padlist (aTHX_ padlist);	272	free_padlist (aTHX_ padlist);
276		273
277	SvREFCNT_dec (av);	274	SvREFCNT_dec (av);
		275
		276	return 0;
278	}	277	}
279		278
280	#define PERL_MAGIC_coro PERL_MAGIC_ext	279	#define PERL_MAGIC_coro PERL_MAGIC_ext
281		280
282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	281	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
283		282
		283	#define CORO_MAGIC(cv) \
		284	SvMAGIC (cv) \
		285	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		286	? SvMAGIC (cv) \
		287	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		288	: 0
		289
284	/* the next two functions merely cache the padlists */	290	/* the next two functions merely cache the padlists */
285	STATIC void	291	static void
286	get_padlist (pTHX_ CV *cv)	292	get_padlist (pTHX_ CV *cv)
287	{	293	{
288	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	294	MAGIC *mg = CORO_MAGIC (cv);
		295	AV *av;
289		296
290	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	297	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
291	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	298	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
292	else	299	else
		300	{
		301	#if CORO_PREFER_PERL_FUNCTIONS
		302	/* this is probably cleaner, but also slower? */
		303	CV *cp = Perl_cv_clone (cv);
		304	CvPADLIST (cv) = CvPADLIST (cp);
		305	CvPADLIST (cp) = 0;
		306	SvREFCNT_dec (cp);
		307	#else
293	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	308	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		309	#endif
		310	}
294	}	311	}
295		312
296	STATIC void	313	static void
297	put_padlist (pTHX_ CV *cv)	314	put_padlist (pTHX_ CV *cv)
298	{	315	{
299	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	316	MAGIC *mg = CORO_MAGIC (cv);
		317	AV *av;
300		318
301	if (!mg)	319	if (!mg)
302	{	320	{
303	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	321	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
304	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	322	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
305	mg->mg_virtual = &vtbl_coro;	323	mg->mg_virtual = &vtbl_coro;
306	mg->mg_obj = (SV *)newAV ();	324	mg->mg_obj = (SV *)newAV ();
307	}	325	}
308		326
309	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	327	av = (AV *)mg->mg_obj;
		328
		329	if (AvFILLp (av) >= AvMAX (av))
		330	av_extend (av, AvMAX (av) + 1);
		331
		332	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
310	}	333	}
		334
		335	/** load & save, init *******************************************************/
311		336
312	#define SB do {	337	#define SB do {
313	#define SE } while (0)	338	#define SE } while (0)
314		339
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	340	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
319		341
320	static void	342	static void
321	load_state(pTHX_ Coro__State c)	343	load_perl (pTHX_ Coro__State c)
322	{	344	{
323	PL_dowarn = c->dowarn;	345	#define VAR(name,type) PL_ ## name = c->name;
324	PL_in_eval = c->in_eval;	346	# include "state.h"
325		347	#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		348
355	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	349	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
356	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	350	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
357	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	351	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		352	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		353
		354	if (c->irssv)
		355	{
		356	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		357	{
		358	SvREFCNT_dec (c->irssv);
		359	c->irssv = 0;
		360	}
		361	else
		362	{
		363	REPLACE_SV (PL_rs, c->irssv);
		364	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		365	sv_setsv (c->irssv_sv, PL_rs);
		366	}
		367	}
358		368
359	{	369	{
360	dSP;	370	dSP;
361	CV *cv;	371	CV *cv;
362		372
363	/* now do the ugly restore mess */	373	/* now do the ugly restore mess */
364	while ((cv = (CV *)POPs))	374	while ((cv = (CV *)POPs))
365	{	375	{
366	AV *padlist = (AV *)POPs;
367
368	if (padlist)
369	{
370	put_padlist (aTHX_ cv); /* mark this padlist as available */	376	put_padlist (aTHX_ cv); /* mark this padlist as available */
371	CvPADLIST(cv) = padlist;	377	CvDEPTH (cv) = PTR2IV (POPs);
372	}	378	CvPADLIST (cv) = (AV *)POPs;
373
374	++CvDEPTH(cv);
375	}	379	}
376		380
377	PUTBACK;	381	PUTBACK;
378	}	382	}
379	}	383	}
380		384
381	static void	385	static void
382	save_state(pTHX_ Coro__State c, int flags)	386	save_perl (pTHX_ Coro__State c)
383	{	387	{
384	{	388	{
385	dSP;	389	dSP;
386	I32 cxix = cxstack_ix;	390	I32 cxix = cxstack_ix;
387	PERL_CONTEXT *ccstk = cxstack;	391	PERL_CONTEXT *ccstk = cxstack;
…		…
390	/*	394	/*
391	* the worst thing you can imagine happens first - we have to save	395	* the worst thing you can imagine happens first - we have to save
392	* (and reinitialize) all cv's in the whole callchain :(	396	* (and reinitialize) all cv's in the whole callchain :(
393	*/	397	*/
394		398
395	PUSHs (Nullsv);	399	XPUSHs (Nullsv);
396	/* this loop was inspired by pp_caller */	400	/* this loop was inspired by pp_caller */
397	for (;;)	401	for (;;)
398	{	402	{
399	while (cxix >= 0)	403	while (cxix >= 0)
400	{	404	{
401	PERL_CONTEXT *cx = &ccstk[cxix--];	405	PERL_CONTEXT *cx = &ccstk[cxix--];
402		406
403	if (CxTYPE(cx) == CXt_SUB)	407	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
404	{	408	{
405	CV *cv = cx->blk_sub.cv;	409	CV *cv = cx->blk_sub.cv;
		410
406	if (CvDEPTH(cv))	411	if (CvDEPTH (cv))
407	{	412	{
408	EXTEND (SP, CvDEPTH(cv)*2);	413	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));	414	PUSHs ((SV *)CvPADLIST (cv));
		415	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
418	PUSHs ((SV *)cv);	416	PUSHs ((SV *)cv);
419		417
		418	CvDEPTH (cv) = 0;
420	get_padlist (aTHX_ cv); /* this is a monster */	419	get_padlist (aTHX_ cv);
421	}	420	}
422	}	421	}
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	}	422	}
432		423
433	if (top_si->si_type == PERLSI_MAIN)	424	if (top_si->si_type == PERLSI_MAIN)
434	break;	425	break;
435		426
436	top_si = top_si->si_prev;	427	top_si = top_si->si_prev;
437	ccstk = top_si->si_cxstack;	428	ccstk = top_si->si_cxstack;
438	cxix = top_si->si_cxix;	429	cxix = top_si->si_cxix;
439	}	430	}
440		431
441	PUTBACK;	432	PUTBACK;
442	}	433	}
443		434
444	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	435	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;	436	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
446	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	437	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		438	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		439	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
447		440
448	c->dowarn = PL_dowarn;	441	#define VAR(name,type)c->name = PL_ ## name;
449	c->in_eval = PL_in_eval;	442	# include "state.h"
450		443	#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	}	444	}
480		445
481	/*	446	/*
482	* allocate various perl stacks. This is an exact copy	447	* allocate various perl stacks. This is an exact copy
483	* of perl.c:init_stacks, except that it uses less memory	448	* of perl.c:init_stacks, except that it uses less memory
484	* on the (sometimes correct) assumption that coroutines do	449	* on the (sometimes correct) assumption that coroutines do
485	* not usually need a lot of stackspace.	450	* not usually need a lot of stackspace.
486	*/	451	*/
487	STATIC void	452	#if CORO_PREFER_PERL_FUNCTIONS
		453	# define coro_init_stacks init_stacks
		454	#else
		455	static void
488	coro_init_stacks (pTHX)	456	coro_init_stacks (pTHX)
489	{	457	{
490	LOCK;	458	PL_curstackinfo = new_stackinfo(64, 6);
491
492	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
493	PL_curstackinfo->si_type = PERLSI_MAIN;	459	PL_curstackinfo->si_type = PERLSI_MAIN;
494	PL_curstack = PL_curstackinfo->si_stack;	460	PL_curstack = PL_curstackinfo->si_stack;
495	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	461	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496		462
497	PL_stack_base = AvARRAY(PL_curstack);	463	PL_stack_base = AvARRAY(PL_curstack);
498	PL_stack_sp = PL_stack_base;	464	PL_stack_sp = PL_stack_base;
499	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	465	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
500		466
501	New(50,PL_tmps_stack,96,SV*);	467	New(50,PL_tmps_stack,64,SV*);
502	PL_tmps_floor = -1;	468	PL_tmps_floor = -1;
503	PL_tmps_ix = -1;	469	PL_tmps_ix = -1;
504	PL_tmps_max = 96;	470	PL_tmps_max = 64;
505		471
506	New(54,PL_markstack,16,I32);	472	New(54,PL_markstack,16,I32);
507	PL_markstack_ptr = PL_markstack;	473	PL_markstack_ptr = PL_markstack;
508	PL_markstack_max = PL_markstack + 16;	474	PL_markstack_max = PL_markstack + 16;
509		475
…		…
513		479
514	New(54,PL_scopestack,16,I32);	480	New(54,PL_scopestack,16,I32);
515	PL_scopestack_ix = 0;	481	PL_scopestack_ix = 0;
516	PL_scopestack_max = 16;	482	PL_scopestack_max = 16;
517		483
518	New(54,PL_savestack,96,ANY);	484	New(54,PL_savestack,64,ANY);
519	PL_savestack_ix = 0;	485	PL_savestack_ix = 0;
520	PL_savestack_max = 96;	486	PL_savestack_max = 64;
521		487
		488	#if !PERL_VERSION_ATLEAST (5,9,0)
522	New(54,PL_retstack,8,OP*);	489	New(54,PL_retstack,4,OP*);
523	PL_retstack_ix = 0;	490	PL_retstack_ix = 0;
524	PL_retstack_max = 8;	491	PL_retstack_max = 4;
525		492	#endif
526	UNLOCK;
527	}	493	}
		494	#endif
528		495
529	/*	496	/*
530	* destroy the stacks, the callchain etc...	497	* destroy the stacks, the callchain etc...
531	*/	498	*/
532	STATIC void	499	static void
533	destroy_stacks(pTHX)	500	coro_destroy_stacks (pTHX)
534	{	501	{
535	if (!IN_DESTRUCT)	502	if (!IN_DESTRUCT)
536	{	503	{
537	/* is this ugly, I ask? */	504	/* restore all saved variables and stuff */
538	LEAVE_SCOPE (0);	505	LEAVE_SCOPE (0);
		506	assert (PL_tmps_floor == -1);
539		507
540	/* sure it is, but more important: is it correct?? :/ */	508	/* free all temporaries */
541	FREETMPS;	509	FREETMPS;
		510	assert (PL_tmps_ix == -1);
542		511
		512	/* unwind all extra stacks */
543	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	513	POPSTACK_TO (PL_mainstack);
		514
		515	/* unwind main stack */
		516	dounwind (-1);
544	}	517	}
545		518
546	while (PL_curstackinfo->si_next)	519	while (PL_curstackinfo->si_next)
547	PL_curstackinfo = PL_curstackinfo->si_next;	520	PL_curstackinfo = PL_curstackinfo->si_next;
548		521
549	while (PL_curstackinfo)	522	while (PL_curstackinfo)
550	{	523	{
551	PERL_SI *p = PL_curstackinfo->si_prev;	524	PERL_SI *p = PL_curstackinfo->si_prev;
552		525
553	{ /*D*//*remove*/
554	dSP;
555	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
556	PUTBACK; /* possibly superfluous */
557	}
558
559	if (!IN_DESTRUCT)	526	if (!IN_DESTRUCT)
560	{
561	dounwind (-1);/*D*//*remove*/
562	SvREFCNT_dec (PL_curstackinfo->si_stack);	527	SvREFCNT_dec (PL_curstackinfo->si_stack);
563	}
564		528
565	Safefree (PL_curstackinfo->si_cxstack);	529	Safefree (PL_curstackinfo->si_cxstack);
566	Safefree (PL_curstackinfo);	530	Safefree (PL_curstackinfo);
567	PL_curstackinfo = p;	531	PL_curstackinfo = p;
568	}	532	}
569		533
570	Safefree (PL_tmps_stack);	534	Safefree (PL_tmps_stack);
571	Safefree (PL_markstack);	535	Safefree (PL_markstack);
572	Safefree (PL_scopestack);	536	Safefree (PL_scopestack);
573	Safefree (PL_savestack);	537	Safefree (PL_savestack);
		538	#if !PERL_VERSION_ATLEAST (5,9,0)
574	Safefree (PL_retstack);	539	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	540	#endif
		541	}
		542
		543	static size_t
		544	coro_rss (struct coro *coro)
		545	{
		546	size_t rss = sizeof (coro);
		547
		548	if (coro->mainstack)
		549	{
		550	if (coro->flags & CF_RUNNING)
595	{	551	{
596	/*FIXME*//*D*//* reasonable stack size! */	552	#define VAR(name,type)coro->name = PL_ ## name;
597	stack->ssize = - (8192 * sizeof (long));	553	# include "state.h"
598	New (0, stack->sptr, 8192, long);	554	#undef VAR
599	}	555	}
600	}
601	else
602	stack->sptr = 0;
603		556
604	ctx->stack = stack;	557	rss += sizeof (coro->curstackinfo);
605	}	558	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		559	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		560	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		561	rss += coro->tmps_max * sizeof (SV *);
		562	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		563	rss += coro->scopestack_max * sizeof (I32);
		564	rss += coro->savestack_max * sizeof (ANY);
606		565
607	static void	566	#if !PERL_VERSION_ATLEAST (5,9,0)
608	deallocate_stack (Coro__State ctx)	567	rss += coro->retstack_max * sizeof (OP *);
609	{	568	#endif
610	coro_stack *stack = ctx->stack;
611
612	ctx->stack = 0;
613
614	if (stack)
615	{	569	}
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		570
625	Safefree (stack);	571	return rss;
626	}
627	else if (ctx->gencnt == stack->gencnt)
628	--stack->usecnt;
629	}
630	}	572	}
631		573
		574	/** coroutine stack handling ************************************************/
		575
632	static void	576	static void
633	setup_coro (void *arg)	577	setup_coro (pTHX_ struct coro *coro)
634	{	578	{
635	/*	579	/*
636	* emulate part of the perl startup here.	580	* emulate part of the perl startup here.
637	*/	581	*/
		582	coro_init_stacks (aTHX);
		583
		584	PL_curcop = &PL_compiling;
		585	PL_in_eval = EVAL_NULL;
		586	PL_comppad = 0;
		587	PL_curpm = 0;
		588	PL_localizing = 0;
		589	PL_dirty = 0;
		590	PL_restartop = 0;
		591
		592	{
		593	dSP;
		594	LOGOP myop;
		595
		596	SvREFCNT_dec (GvAV (PL_defgv));
		597	GvAV (PL_defgv) = coro->args; coro->args = 0;
		598
		599	Zero (&myop, 1, LOGOP);
		600	myop.op_next = Nullop;
		601	myop.op_flags = OPf_WANT_VOID;
		602
		603	PUSHMARK (SP);
		604	XPUSHs (av_shift (GvAV (PL_defgv)));
		605	PUTBACK;
		606	PL_op = (OP *)&myop;
		607	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		608	SPAGAIN;
		609	}
		610
		611	ENTER; /* necessary e.g. for dounwind */
		612	}
		613
		614	static void
		615	free_coro_mortal (pTHX)
		616	{
		617	if (coro_mortal)
		618	{
		619	SvREFCNT_dec (coro_mortal);
		620	coro_mortal = 0;
		621	}
		622	}
		623
		624	/* inject a fake call to Coro::State::_cctx_init into the execution */
		625	/* _cctx_init should be careful, as it could be called at almost any time */
		626	/* during execution of a perl program */
		627	static void NOINLINE
		628	prepare_cctx (pTHX_ coro_cctx *cctx)
		629	{
		630	dSP;
		631	LOGOP myop;
		632
		633	Zero (&myop, 1, LOGOP);
		634	myop.op_next = PL_op;
		635	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		636
		637	PUSHMARK (SP);
		638	EXTEND (SP, 2);
		639	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		640	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		641	PUTBACK;
		642	PL_op = (OP *)&myop;
		643	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		644	SPAGAIN;
		645	}
		646
		647	/*
		648	* this is a _very_ stripped down perl interpreter ;)
		649	*/
		650	static void
		651	coro_run (void *arg)
		652	{
638	dTHX;	653	dTHX;
639	dSP;
640	Coro__State ctx = (Coro__State)arg;
641	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
642		654
643	coro_init_stacks (aTHX);	655	/* coro_run is the alternative tail of transfer(), so unlock here. */
644	/*PL_curcop = 0;*/	656	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		657
649	SPAGAIN;	658	PL_top_env = &PL_start_env;
650		659
651	if (ctx->stack)	660	/* inject a fake subroutine call to cctx_init */
652	{	661	prepare_cctx (aTHX_ (coro_cctx *)arg);
653	ctx->cursp = 0;
654		662
655	PUSHMARK(SP);	663	/* somebody or something will hit me for both perl_run and PL_restartop */
656	PUTBACK;	664	PL_restartop = PL_op;
657	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	665	perl_run (PL_curinterp);
658		666
659	if (SvTRUE (ERRSV))	667	/*
660	croak (NULL);	668	* If perl-run returns we assume exit() was being called or the coro
661	else	669	* fell off the end, which seems to be the only valid (non-bug)
662	croak ("FATAL: CCTXT coroutine returned!");	670	* reason for perl_run to return. We try to exit by jumping to the
		671	* bootstrap-time "top" top_env, as we cannot restore the "main"
		672	* coroutine as Coro has no such concept
		673	*/
		674	PL_top_env = main_top_env;
		675	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		676	}
		677
		678	static coro_cctx *
		679	cctx_new ()
		680	{
		681	coro_cctx *cctx;
		682	void *stack_start;
		683	size_t stack_size;
		684
		685	++cctx_count;
		686
		687	Newz (0, cctx, 1, coro_cctx);
		688
		689	#if HAVE_MMAP
		690
		691	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		692	/* mmap supposedly does allocate-on-write for us */
		693	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		694
		695	if (cctx->sptr != (void *)-1)
		696	{
		697	# if CORO_STACKGUARD
		698	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		699	# endif
		700	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		701	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		702	cctx->mapped = 1;
663	}	703	}
664	else	704	else
665	{	705	#endif
666	UNOP myop;
667
668	PL_op = (OP *)&myop;
669
670	Zero(&myop, 1, UNOP);
671	myop.op_next = Nullop;
672	myop.op_flags = OPf_WANT_VOID;
673
674	PUSHMARK(SP);
675	XPUSHs (sub_init);
676	/*
677	* the next line is slightly wrong, as PL_op->op_next
678	* is actually being executed so we skip the first op.
679	* that doesn't matter, though, since it is only
680	* pp_nextstate and we never return...
681	* ah yes, and I don't care anyways ;)
682	*/
683	PUTBACK;
684	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685	SPAGAIN;
686
687	ENTER; /* necessary e.g. for dounwind */
688	}	706	{
689	}	707	cctx->ssize = coro_stacksize * (long)sizeof (long);
		708	New (0, cctx->sptr, coro_stacksize, long);
690		709
691	static void	710	if (!cctx->sptr)
692	continue_coro (void *arg)	711	{
693	{	712	perror ("FATAL: unable to allocate stack for coroutine");
694	/*	713	_exit (EXIT_FAILURE);
695	* this is a _very_ stripped down perl interpreter ;)	714	}
696	*/
697	dTHX;
698	Coro__State ctx = (Coro__State)arg;
699	JMPENV coro_start_env;
700		715
701	PL_top_env = &ctx->start_env;	716	stack_start = cctx->sptr;
		717	stack_size = cctx->ssize;
		718	}
702		719
703	ctx->cursp = 0;	720	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		721	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		722
		723	return cctx;
		724	}
		725
		726	static void
		727	cctx_destroy (coro_cctx *cctx)
		728	{
		729	if (!cctx)
		730	return;
		731
		732	--cctx_count;
		733
		734	#if CORO_USE_VALGRIND
		735	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		736	#endif
		737
		738	#if HAVE_MMAP
		739	if (cctx->mapped)
		740	munmap (cctx->sptr, cctx->ssize);
		741	else
		742	#endif
		743	Safefree (cctx->sptr);
		744
		745	Safefree (cctx);
		746	}
		747
		748	static coro_cctx *
		749	cctx_get (pTHX)
		750	{
		751	while (cctx_first)
		752	{
		753	coro_cctx *cctx = cctx_first;
		754	cctx_first = cctx->next;
		755	--cctx_idle;
		756
		757	if (cctx->ssize >= coro_stacksize)
		758	return cctx;
		759
		760	cctx_destroy (cctx);
		761	}
		762
704	PL_op = PL_op->op_next;	763	PL_op = PL_op->op_next;
705	CALLRUNOPS(aTHX);	764	return cctx_new ();
706
707	abort ();
708	}	765	}
709		766
710	STATIC void	767	static void
		768	cctx_put (coro_cctx *cctx)
		769	{
		770	/* free another cctx if overlimit */
		771	if (cctx_idle >= MAX_IDLE_CCTX)
		772	{
		773	coro_cctx *first = cctx_first;
		774	cctx_first = first->next;
		775	--cctx_idle;
		776
		777	assert (!first->inuse);
		778	cctx_destroy (first);
		779	}
		780
		781	++cctx_idle;
		782	cctx->next = cctx_first;
		783	cctx_first = cctx;
		784	}
		785
		786	/** coroutine switching *****************************************************/
		787
		788	/* never call directly, always through the coro_state_transfer global variable */
		789	static void NOINLINE
711	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	790	transfer (pTHX_ struct coro *prev, struct coro *next)
712	{	791	{
713	dSTACKLEVEL;	792	dSTACKLEVEL;
714		793
		794	/* sometimes transfer is only called to set idle_sp */
		795	if (!next)
		796	{
		797	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		798	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		799	}
715	if (prev != next)	800	else if (prev != next)
716	{	801	{
717	if (next->mainstack)	802	coro_cctx *prev__cctx;
		803
		804	if (prev->flags & CF_NEW)
718	{	805	{
719	LOCK;	806	/* create a new empty context */
720	SAVE (prev, flags);	807	Newz (0, prev->cctx, 1, coro_cctx);
721	LOAD (next);	808	prev->cctx->inuse = 1;
722	UNLOCK;	809	prev->flags &= ~CF_NEW;
723		810	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	}	811	}
757	else if (next->tmps_ix == -2)	812
758	croak ("tried to transfer to running coroutine");	813	/*TODO: must not croak here */
		814	if (!prev->flags & CF_RUNNING)
		815	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		816
		817	if (next->flags & CF_RUNNING)
		818	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		819
		820	if (next->flags & CF_DESTROYED)
		821	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		822
		823	prev->flags &= ~CF_RUNNING;
		824	next->flags |= CF_RUNNING;
		825
		826	LOCK;
		827
		828	if (next->flags & CF_NEW)
		829	{
		830	/* need to start coroutine */
		831	next->flags &= ~CF_NEW;
		832	/* first get rid of the old state */
		833	save_perl (aTHX_ prev);
		834	/* setup coroutine call */
		835	setup_coro (aTHX_ next);
		836	/* need a new stack */
		837	assert (!next->cctx);
		838	}
759	else	839	else
760	{	840	{
761	LOCK;	841	/* coroutine already started */
762	SAVE (prev, -1); /* first get rid of the old state */	842	save_perl (aTHX_ prev);
763	UNLOCK;	843	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	}	844	}
800	}
801		845
802	LOCK;	846	prev__cctx = prev->cctx;
803	if (coro_mortal)	847
804	{	848	/* possibly "free" the cctx */
805	SvREFCNT_dec (coro_mortal);	849	if (prev__cctx->idle_sp == STACKLEVEL)
806	coro_mortal = 0;	850	{
807	}	851	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		852	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		853
		854	prev->cctx = 0;
		855
		856	cctx_put (prev__cctx);
		857	prev__cctx->inuse = 0;
		858	}
		859
		860	if (!next->cctx)
		861	{
		862	next->cctx = cctx_get (aTHX);
		863	assert (!next->cctx->inuse);
		864	next->cctx->inuse = 1;
		865	}
		866
		867	if (prev__cctx != next->cctx)
		868	{
		869	prev__cctx->top_env = PL_top_env;
		870	PL_top_env = next->cctx->top_env;
		871	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		872	}
		873
		874	free_coro_mortal (aTHX);
808	UNLOCK;	875	UNLOCK;
		876	}
809	}	877	}
810		878
811	#define SV_CORO(sv,func) \	879	struct transfer_args
812	do { \	880	{
813	if (SvROK (sv)) \	881	struct coro *prev, *next;
814	sv = SvRV (sv); \	882	};
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		883
832	#define SvSTATE(sv) (struct coro *)SvIV (sv)	884	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
833		885
		886	/** high level stuff ********************************************************/
		887
834	static void	888	static int
		889	coro_state_destroy (pTHX_ struct coro *coro)
		890	{
		891	if (coro->flags & CF_DESTROYED)
		892	return 0;
		893
		894	coro->flags |= CF_DESTROYED;
		895
		896	if (coro->flags & CF_READY)
		897	{
		898	/* reduce nready, as destroying a ready coro effectively unreadies it */
		899	/* alternative: look through all ready queues and remove the coro */
		900	LOCK;
		901	--coro_nready;
		902	UNLOCK;
		903	}
		904	else
		905	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		906
		907	if (coro->mainstack && coro->mainstack != main_mainstack)
		908	{
		909	struct coro temp;
		910
		911	assert (!(coro->flags & CF_RUNNING));
		912
		913	Zero (&temp, 1, struct coro);
		914	temp.save = CORO_SAVE_ALL;
		915
		916	if (coro->flags & CF_RUNNING)
		917	croak ("FATAL: tried to destroy currently running coroutine");
		918
		919	save_perl (aTHX_ &temp);
		920	load_perl (aTHX_ coro);
		921
		922	coro_destroy_stacks (aTHX);
		923
		924	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		925
		926	coro->mainstack = 0;
		927	}
		928
		929	cctx_destroy (coro->cctx);
		930	SvREFCNT_dec (coro->args);
		931
		932	if (coro->next) coro->next->prev = coro->prev;
		933	if (coro->prev) coro->prev->next = coro->next;
		934	if (coro == coro_first) coro_first = coro->next;
		935
		936	return 1;
		937	}
		938
		939	static int
		940	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		941	{
		942	struct coro *coro = (struct coro *)mg->mg_ptr;
		943	mg->mg_ptr = 0;
		944
		945	coro->hv = 0;
		946
		947	if (--coro->refcnt < 0)
		948	{
		949	coro_state_destroy (aTHX_ coro);
		950	Safefree (coro);
		951	}
		952
		953	return 0;
		954	}
		955
		956	static int
		957	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		958	{
		959	struct coro *coro = (struct coro *)mg->mg_ptr;
		960
		961	++coro->refcnt;
		962
		963	return 0;
		964	}
		965
		966	static MGVTBL coro_state_vtbl = {
		967	0, 0, 0, 0,
		968	coro_state_free,
		969	0,
		970	#ifdef MGf_DUP
		971	coro_state_dup,
		972	#else
		973	# define MGf_DUP 0
		974	#endif
		975	};
		976
		977	static struct coro *
		978	SvSTATE_ (pTHX_ SV *coro)
		979	{
		980	HV *stash;
		981	MAGIC *mg;
		982
		983	if (SvROK (coro))
		984	coro = SvRV (coro);
		985
		986	stash = SvSTASH (coro);
		987	if (stash != coro_stash && stash != coro_state_stash)
		988	{
		989	/* very slow, but rare, check */
		990	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		991	croak ("Coro::State object required");
		992	}
		993
		994	mg = CORO_MAGIC (coro);
		995	return (struct coro *)mg->mg_ptr;
		996	}
		997
		998	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		999
		1000	static void
		1001	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1002	{
		1003	ta->prev = SvSTATE (prev_sv);
		1004	ta->next = SvSTATE (next_sv);
		1005	}
		1006
		1007	static void
835	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1008	api_transfer (SV *prev_sv, SV *next_sv)
836	{	1009	{
837	SV_CORO (prev, "Coro::transfer");	1010	dTHX;
838	SV_CORO (next, "Coro::transfer");	1011	struct transfer_args ta;
839		1012
840	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1013	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1014	TRANSFER (ta);
		1015	}
		1016
		1017	static int
		1018	api_save (SV *coro_sv, int new_save)
		1019	{
		1020	dTHX;
		1021	struct coro *coro = SvSTATE (coro_sv);
		1022	int old_save = coro->save;
		1023
		1024	if (new_save >= 0)
		1025	coro->save = new_save;
		1026
		1027	return old_save;
841	}	1028	}
842		1029
843	/** Coro ********************************************************************/	1030	/** Coro ********************************************************************/
844		1031
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	1032	static void
858	coro_enq (pTHX_ SV *sv)	1033	coro_enq (pTHX_ SV *coro_sv)
859	{	1034	{
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);	1035	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	}	1036	}
877		1037
878	static SV *	1038	static SV *
879	coro_deq (pTHX_ int min_prio)	1039	coro_deq (pTHX_ int min_prio)
880	{	1040	{
…		…
883	min_prio -= PRIO_MIN;	1043	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	1044	if (min_prio < 0)
885	min_prio = 0;	1045	min_prio = 0;
886		1046
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1047	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (av_len (coro_ready[prio]) >= 0)	1048	if (AvFILLp (coro_ready [prio]) >= 0)
889	{
890	coro_nready--;
891	return av_shift (coro_ready[prio]);	1049	return av_shift (coro_ready [prio]);
892	}
893		1050
894	return 0;	1051	return 0;
895	}	1052	}
896		1053
897	static void	1054	static int
898	api_ready (SV *coro)	1055	api_ready (SV *coro_sv)
899	{	1056	{
900	dTHX;	1057	dTHX;
		1058	struct coro *coro;
901		1059
902	if (SvROK (coro))	1060	if (SvROK (coro_sv))
903	coro = SvRV (coro);	1061	coro_sv = SvRV (coro_sv);
		1062
		1063	coro = SvSTATE (coro_sv);
		1064
		1065	if (coro->flags & CF_READY)
		1066	return 0;
		1067
		1068	coro->flags |= CF_READY;
904		1069
905	LOCK;	1070	LOCK;
906	coro_enq (aTHX_ SvREFCNT_inc (coro));	1071	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1072	++coro_nready;
907	UNLOCK;	1073	UNLOCK;
		1074
		1075	return 1;
		1076	}
		1077
		1078	static int
		1079	api_is_ready (SV *coro_sv)
		1080	{
		1081	dTHX;
		1082	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1083	}
		1084
		1085	static void
		1086	prepare_schedule (pTHX_ struct transfer_args *ta)
		1087	{
		1088	SV *prev_sv, *next_sv;
		1089
		1090	for (;;)
		1091	{
		1092	LOCK;
		1093	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1094
		1095	/* nothing to schedule: call the idle handler */
		1096	if (!next_sv)
		1097	{
		1098	dSP;
		1099	UNLOCK;
		1100
		1101	ENTER;
		1102	SAVETMPS;
		1103
		1104	PUSHMARK (SP);
		1105	PUTBACK;
		1106	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1107
		1108	FREETMPS;
		1109	LEAVE;
		1110	continue;
		1111	}
		1112
		1113	ta->next = SvSTATE (next_sv);
		1114
		1115	/* cannot transfer to destroyed coros, skip and look for next */
		1116	if (ta->next->flags & CF_DESTROYED)
		1117	{
		1118	UNLOCK;
		1119	SvREFCNT_dec (next_sv);
		1120	/* coro_nready is already taken care of by destroy */
		1121	continue;
		1122	}
		1123
		1124	--coro_nready;
		1125	UNLOCK;
		1126	break;
		1127	}
		1128
		1129	/* free this only after the transfer */
		1130	prev_sv = SvRV (coro_current);
		1131	SvRV_set (coro_current, next_sv);
		1132	ta->prev = SvSTATE (prev_sv);
		1133
		1134	assert (ta->next->flags & CF_READY);
		1135	ta->next->flags &= ~CF_READY;
		1136
		1137	LOCK;
		1138	free_coro_mortal (aTHX);
		1139	coro_mortal = prev_sv;
		1140	UNLOCK;
		1141	}
		1142
		1143	static void
		1144	prepare_cede (pTHX_ struct transfer_args *ta)
		1145	{
		1146	api_ready (coro_current);
		1147	prepare_schedule (aTHX_ ta);
		1148	}
		1149
		1150	static int
		1151	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1152	{
		1153	if (coro_nready)
		1154	{
		1155	SV *prev = SvRV (coro_current);
		1156	prepare_schedule (aTHX_ ta);
		1157	api_ready (prev);
		1158	return 1;
		1159	}
		1160	else
		1161	return 0;
908	}	1162	}
909		1163
910	static void	1164	static void
911	api_schedule (void)	1165	api_schedule (void)
912	{	1166	{
913	dTHX;	1167	dTHX;
		1168	struct transfer_args ta;
914		1169
915	SV *prev, *next;	1170	prepare_schedule (aTHX_ &ta);
916		1171	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	}	1172	}
938		1173
939	static void	1174	static int
940	api_cede (void)	1175	api_cede (void)
941	{	1176	{
942	dTHX;	1177	dTHX;
		1178	struct transfer_args ta;
943		1179
944	LOCK;	1180	prepare_cede (aTHX_ &ta);
945	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
946	UNLOCK;
947		1181
948	api_schedule ();	1182	if (ta.prev != ta.next)
		1183	{
		1184	TRANSFER (ta);
		1185	return 1;
		1186	}
		1187	else
		1188	return 0;
		1189	}
		1190
		1191	static int
		1192	api_cede_notself (void)
		1193	{
		1194	dTHX;
		1195	struct transfer_args ta;
		1196
		1197	if (prepare_cede_notself (aTHX_ &ta))
		1198	{
		1199	TRANSFER (ta);
		1200	return 1;
		1201	}
		1202	else
		1203	return 0;
949	}	1204	}
950		1205
951	MODULE = Coro::State PACKAGE = Coro::State	1206	MODULE = Coro::State PACKAGE = Coro::State
952		1207
953	PROTOTYPES: ENABLE	1208	PROTOTYPES: DISABLE
954		1209
955	BOOT:	1210	BOOT:
956	{ /* {} necessary for stoopid perl-5.6.x */	1211	{
957	#ifdef USE_ITHREADS	1212	#ifdef USE_ITHREADS
958	MUTEX_INIT (&coro_mutex);	1213	MUTEX_INIT (&coro_mutex);
959	#endif	1214	#endif
		1215	BOOT_PAGESIZE;
960		1216
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);	1217	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964		1218
965	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1219	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
966	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1220	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
967	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1221	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1222	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1223	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
968	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1224	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1225	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
969		1226
970	main_mainstack = PL_mainstack;	1227	main_mainstack = PL_mainstack;
		1228	main_top_env = PL_top_env;
		1229
		1230	while (main_top_env->je_prev)
		1231	main_top_env = main_top_env->je_prev;
971		1232
972	coroapi.ver = CORO_API_VERSION;	1233	coroapi.ver = CORO_API_VERSION;
973	coroapi.transfer = api_transfer;	1234	coroapi.transfer = api_transfer;
974	}
975		1235
976	Coro::State	1236	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
977	_newprocess(args)	1237	}
978	SV * args	1238
979	PROTOTYPE: $	1239	SV *
		1240	new (char *klass, ...)
980	CODE:	1241	CODE:
981	Coro__State coro;	1242	{
		1243	struct coro *coro;
		1244	HV *hv;
		1245	int i;
982		1246
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);	1247	Newz (0, coro, 1, struct coro);
		1248	coro->args = newAV ();
		1249	coro->save = CORO_SAVE_DEF;
		1250	coro->flags = CF_NEW;
987		1251
988	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1252	if (coro_first) coro_first->prev = coro;
989	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1253	coro->next = coro_first;
990	/*coro->stack = 0;*/	1254	coro_first = coro;
991		1255
992	/* same as JMPENV_BOOTSTRAP */	1256	coro->hv = hv = newHV ();
993	/* we might be able to recycle start_env, but safe is safe */	1257	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
994	/*Zero(&coro->start_env, 1, JMPENV);*/	1258	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
995	coro->start_env.je_ret = -1;
996	coro->start_env.je_mustcatch = TRUE;
997		1259
998	RETVAL = coro;	1260	for (i = 1; i < items; i++)
		1261	av_push (coro->args, newSVsv (ST (i)));
		1262	}
999	OUTPUT:	1263	OUTPUT:
1000	RETVAL	1264	RETVAL
1001		1265
		1266	int
		1267	save (SV *coro, int new_save = -1)
		1268	CODE:
		1269	RETVAL = api_save (coro, new_save);
		1270	OUTPUT:
		1271	RETVAL
		1272
		1273	int
		1274	save_also (SV *coro_sv, int save_also)
		1275	CODE:
		1276	{
		1277	struct coro *coro = SvSTATE (coro_sv);
		1278	RETVAL = coro->save;
		1279	coro->save |= save_also;
		1280	}
		1281	OUTPUT:
		1282	RETVAL
		1283
1002	void	1284	void
1003	transfer(prev, next, flags)	1285	_set_stacklevel (...)
1004	SV *prev	1286	ALIAS:
1005	SV *next	1287	Coro::State::transfer = 1
1006	int flags	1288	Coro::schedule = 2
1007	PROTOTYPE: @	1289	Coro::cede = 3
		1290	Coro::cede_notself = 4
1008	CODE:	1291	CODE:
1009	PUTBACK;	1292	{
1010	SV_CORO (next, "Coro::transfer");	1293	struct transfer_args ta;
1011	SV_CORO (prev, "Coro::transfer");	1294
1012	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1295	switch (ix)
1013	SPAGAIN;	1296	{
		1297	case 0:
		1298	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1299	ta.next = 0;
		1300	break;
		1301
		1302	case 1:
		1303	if (items != 2)
		1304	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1305
		1306	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1307	break;
		1308
		1309	case 2:
		1310	prepare_schedule (aTHX_ &ta);
		1311	break;
		1312
		1313	case 3:
		1314	prepare_cede (aTHX_ &ta);
		1315	break;
		1316
		1317	case 4:
		1318	if (!prepare_cede_notself (aTHX_ &ta))
		1319	XSRETURN_EMPTY;
		1320
		1321	break;
		1322	}
		1323
		1324	BARRIER;
		1325	TRANSFER (ta);
		1326
		1327	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1328	XSRETURN_YES;
		1329	}
		1330
		1331	bool
		1332	_destroy (SV *coro_sv)
		1333	CODE:
		1334	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1335	OUTPUT:
		1336	RETVAL
1014		1337
1015	void	1338	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)	1339	_exit (code)
1043	int code	1340	int code
1044	PROTOTYPE: $	1341	PROTOTYPE: $
1045	CODE:	1342	CODE:
1046	_exit (code);	1343	_exit (code);
1047		1344
1048	MODULE = Coro::State PACKAGE = Coro::Cont	1345	int
		1346	cctx_stacksize (int new_stacksize = 0)
		1347	CODE:
		1348	RETVAL = coro_stacksize;
		1349	if (new_stacksize)
		1350	coro_stacksize = new_stacksize;
		1351	OUTPUT:
		1352	RETVAL
1049		1353
1050	# this is slightly dirty (should expose a c-level api)	1354	int
		1355	cctx_count ()
		1356	CODE:
		1357	RETVAL = cctx_count;
		1358	OUTPUT:
		1359	RETVAL
		1360
		1361	int
		1362	cctx_idle ()
		1363	CODE:
		1364	RETVAL = cctx_idle;
		1365	OUTPUT:
		1366	RETVAL
1051		1367
1052	void	1368	void
1053	yield(...)	1369	list ()
1054	PROTOTYPE: @	1370	PPCODE:
		1371	{
		1372	struct coro *coro;
		1373	for (coro = coro_first; coro; coro = coro->next)
		1374	if (coro->hv)
		1375	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1376	}
		1377
		1378	void
		1379	_eval (Coro::State coro, SV *coderef)
		1380	CODE:
		1381	{
		1382	if (coro->mainstack)
		1383	{
		1384	struct coro temp;
		1385	Zero (&temp, 1, struct coro);
		1386	temp.save = CORO_SAVE_ALL;
		1387
		1388	if (!(coro->flags & CF_RUNNING))
		1389	{
		1390	save_perl (aTHX_ &temp);
		1391	load_perl (aTHX_ coro);
		1392	}
		1393
		1394	{
		1395	dSP;
		1396	ENTER;
		1397	SAVETMPS;
		1398	PUSHMARK (SP);
		1399	PUTBACK;
		1400	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1401	SPAGAIN;
		1402	FREETMPS;
		1403	LEAVE;
		1404	PUTBACK;
		1405	}
		1406
		1407	if (!(coro->flags & CF_RUNNING))
		1408	{
		1409	save_perl (aTHX_ coro);
		1410	load_perl (aTHX_ &temp);
		1411	}
		1412	}
		1413	}
		1414
		1415	SV *
		1416	is_ready (Coro::State coro)
		1417	PROTOTYPE: $
		1418	ALIAS:
		1419	is_ready = CF_READY
		1420	is_running = CF_RUNNING
		1421	is_new = CF_NEW
		1422	is_destroyed = CF_DESTROYED
		1423	CODE:
		1424	RETVAL = boolSV (coro->flags & ix);
		1425	OUTPUT:
		1426	RETVAL
		1427
		1428	IV
		1429	rss (Coro::State coro)
		1430	PROTOTYPE: $
1055	CODE:	1431	CODE:
1056	SV *yieldstack;	1432	RETVAL = coro_rss (coro);
1057	SV *sv;	1433	OUTPUT:
1058	AV *defav = GvAV (PL_defgv);	1434	RETVAL
1059	struct coro *prev, *next;
1060		1435
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		1436
1080	MODULE = Coro::State PACKAGE = Coro	1437	MODULE = Coro::State PACKAGE = Coro
1081		1438
1082	# this is slightly dirty (should expose a c-level api)
1083
1084	BOOT:	1439	BOOT:
1085	{	1440	{
1086	int i;	1441	int i;
		1442
1087	HV *stash = gv_stashpv ("Coro", TRUE);	1443	coro_stash = gv_stashpv ("Coro", TRUE);
1088		1444
1089	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1445	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1090	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1446	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1091	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1447	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1092	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1448	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1093	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1449	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1094	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1450	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1095		1451
1096	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1452	coro_current = get_sv ("Coro::current", FALSE);
1097	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1453	SvREADONLY_on (coro_current);
1098		1454
1099	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1455	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1100	coro_ready[i] = newAV ();	1456	coro_ready[i] = newAV ();
1101		1457
1102	{	1458	{
1103	SV *sv = perl_get_sv("Coro::API", 1);	1459	SV *sv = perl_get_sv("Coro::API", 1);
1104		1460
1105	coroapi.schedule = api_schedule;	1461	coroapi.schedule = api_schedule;
		1462	coroapi.save = api_save;
1106	coroapi.cede = api_cede;	1463	coroapi.cede = api_cede;
		1464	coroapi.cede_notself = api_cede_notself;
1107	coroapi.ready = api_ready;	1465	coroapi.ready = api_ready;
		1466	coroapi.is_ready = api_is_ready;
1108	coroapi.nready = &coro_nready;	1467	coroapi.nready = &coro_nready;
1109	coroapi.current = coro_current;	1468	coroapi.current = coro_current;
1110		1469
1111	GCoroAPI = &coroapi;	1470	GCoroAPI = &coroapi;
1112	sv_setiv(sv, (IV)&coroapi);	1471	sv_setiv (sv, (IV)&coroapi);
1113	SvREADONLY_on(sv);	1472	SvREADONLY_on (sv);
1114	}	1473	}
1115	}	1474	}
1116		1475
1117	#if !PERL_MICRO
1118
1119	void	1476	void
1120	ready(self)	1477	_set_current (SV *current)
1121	SV * self
1122	PROTOTYPE: $	1478	PROTOTYPE: $
1123	CODE:	1479	CODE:
1124	api_ready (self);	1480	SvREFCNT_dec (SvRV (coro_current));
1125		1481	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1126	#endif
1127		1482
1128	int	1483	int
		1484	prio (Coro::State coro, int newprio = 0)
		1485	ALIAS:
		1486	nice = 1
		1487	CODE:
		1488	{
		1489	RETVAL = coro->prio;
		1490
		1491	if (items > 1)
		1492	{
		1493	if (ix)
		1494	newprio = coro->prio - newprio;
		1495
		1496	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1497	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1498
		1499	coro->prio = newprio;
		1500	}
		1501	}
		1502	OUTPUT:
		1503	RETVAL
		1504
		1505	SV *
		1506	ready (SV *self)
		1507	PROTOTYPE: $
		1508	CODE:
		1509	RETVAL = boolSV (api_ready (self));
		1510	OUTPUT:
		1511	RETVAL
		1512
		1513	int
1129	nready(...)	1514	nready (...)
1130	PROTOTYPE:	1515	PROTOTYPE:
1131	CODE:	1516	CODE:
1132	RETVAL = coro_nready;	1517	RETVAL = coro_nready;
1133	OUTPUT:	1518	OUTPUT:
1134	RETVAL	1519	RETVAL
1135		1520
		1521	MODULE = Coro::State PACKAGE = Coro::AIO
		1522
		1523	SV *
		1524	_get_state ()
		1525	CODE:
		1526	{
		1527	struct io_state *data;
		1528
		1529	RETVAL = newSV (sizeof (struct io_state));
		1530	data = (struct io_state *)SvPVX (RETVAL);
		1531	SvCUR_set (RETVAL, sizeof (struct io_state));
		1532	SvPOK_only (RETVAL);
		1533
		1534	data->errorno = errno;
		1535	data->laststype = PL_laststype;
		1536	data->laststatval = PL_laststatval;
		1537	data->statcache = PL_statcache;
		1538	}
		1539	OUTPUT:
		1540	RETVAL
		1541
1136	void	1542	void
1137	schedule(...)	1543	_set_state (char *data_)
1138	PROTOTYPE:	1544	PROTOTYPE: $
1139	CODE:	1545	CODE:
1140	api_schedule ();	1546	{
		1547	struct io_state *data = (void *)data_;
1141		1548
1142	void	1549	errno = data->errorno;
1143	cede(...)	1550	PL_laststype = data->laststype;
1144	PROTOTYPE:	1551	PL_laststatval = data->laststatval;
1145	CODE:	1552	PL_statcache = data->statcache;
1146	api_cede ();	1553	}
1147		1554

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