[ViewVC] Diff of: cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.74 by root, Mon Oct 23 22:49:09 2006 UTC vs.
Revision 1.157 by root, Fri Sep 21 02:01:13 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 PERL_VERSION < 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 <errno.h>	75	/* 5.8.7 */
33	#include <signal.h>	76	#ifndef SvRV_set
34		77	# define SvRV_set(s,v) SvRV(s) = (v)
35	#ifdef HAVE_MMAP
36	# include <unistd.h>
37	# include <sys/mman.h>
38	# ifndef MAP_ANONYMOUS
39	# ifdef MAP_ANON
40	# define MAP_ANONYMOUS MAP_ANON
41	# else
42	# undef HAVE_MMAP
43	# endif
44	# endif	78	#endif
45	#endif
46		79
47	#define SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
48	#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
49		92
50	/* 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
51	* 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
52	* and should be unique. */	95	* and should be unique. */
		96	#define dSTACKLEVEL int stacklevel
53	#define dSTACKLEVEL void *stacklevel = &stacklevel	97	#define STACKLEVEL ((void *)&stacklevel)
54		98
55	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
56		100
57	#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))
58		110
59	#include "CoroAPI.h"	111	#include "CoroAPI.h"
60		112
61	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
62	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
…		…
65	#else	117	#else
66	# define LOCK (void)0	118	# define LOCK (void)0
67	# define UNLOCK (void)0	119	# define UNLOCK (void)0
68	#endif	120	#endif
69		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;
70	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
71	static AV main_mainstack; / used to differentiate between $main and others */	133	static AV main_mainstack; / used to differentiate between $main and others */
		134	static JMPENV *main_top_env;
72	static HV *coro_state_stash;	135	static HV coro_state_stash, coro_stash;
73	static SV *ucoro_state_sv;
74	static U32 ucoro_state_hash;
75	static SV coro_mortal; / will be freed after next transfer */	136	static SV coro_mortal; / will be freed after next transfer */
76		137
77	/* this is actually not only the c stack but also c registers etc... */	138	static struct coro_cctx *cctx_first;
		139	static int cctx_count, cctx_idle;
		140
		141	/* this is a structure representing a c-level coroutine */
78	typedef struct {	142	typedef struct coro_cctx {
79	int refcnt; /* pointer reference counter */	143	struct coro_cctx *next;
80	int usecnt; /* shared by how many coroutines */
81	int gencnt; /* generation counter */
82		144
		145	/* the stack */
		146	void *sptr;
		147	size_t ssize;
		148
		149	/* cpu state */
		150	void idle_sp; / sp of top-level transfer/schedule/cede call */
		151	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		152	JMPENV *top_env;
83	coro_context cctx;	153	coro_context cctx;
84		154
85	void *sptr;	155	#if CORO_USE_VALGRIND
86	long ssize; /* positive == mmap, otherwise malloc */	156	int valgrind_id;
87	} coro_stack;	157	#endif
		158	char inuse, mapped;
		159	} coro_cctx;
88		160
		161	enum {
		162	CF_RUNNING = 0x0001, /* coroutine is running */
		163	CF_READY = 0x0002, /* coroutine is ready */
		164	CF_NEW = 0x0004, /* has never been switched to */
		165	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		166	};
		167
		168	/* this is a structure representing a perl-level coroutine */
89	struct coro {	169	struct coro {
90	/* the top-level JMPENV for each coroutine, needed to catch dies. */	170	/* the c coroutine allocated to this perl coroutine, if any */
91	JMPENV start_env;	171	coro_cctx *cctx;
92
93	/* the optional C context */
94	coro_stack *stack;
95	void *cursp;
96	int gencnt;
97
98	/* optionally saved, might be zero */
99	AV *defav;
100	SV *defsv;
101	SV *errsv;
102
103	/* saved global state not related to stacks */
104	U8 dowarn;
105	I32 in_eval;
106
107	/* the stacks and related info (callchain etc..) */
108	PERL_SI *curstackinfo;
109	AV *curstack;
110	AV *mainstack;
111	SV **stack_sp;
112	OP *op;
113	SV **curpad;
114	AV *comppad;
115	CV *compcv;
116	SV **stack_base;
117	SV **stack_max;
118	SV **tmps_stack;
119	I32 tmps_floor;
120	I32 tmps_ix;
121	I32 tmps_max;
122	I32 *markstack;
123	I32 *markstack_ptr;
124	I32 *markstack_max;
125	I32 *scopestack;
126	I32 scopestack_ix;
127	I32 scopestack_max;
128	ANY *savestack;
129	I32 savestack_ix;
130	I32 savestack_max;
131	OP **retstack;
132	I32 retstack_ix;
133	I32 retstack_max;
134	PMOP *curpm;
135	COP *curcop;
136	JMPENV *top_env;
137		172
138	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
139	AV *args;	174	AV *args;
		175	int refcnt;
		176	int save; /* CORO_SAVE flags */
		177	int flags; /* CF_ flags */
		178
		179	/* optionally saved, might be zero */
		180	AV defav; / @_ */
		181	SV defsv; / $_ */
		182	SV errsv; / $@ */
		183	GV deffh; / default filehandle */
		184	SV irssv; / $/ */
		185	SV irssv_sv; / real $/ cache */
		186
		187	#define VAR(name,type) type name;
		188	# include "state.h"
		189	#undef VAR
		190
		191	/* coro process data */
		192	int prio;
		193
		194	/* linked list */
		195	struct coro next, prev;
		196	HV hv; / the perl hash associated with this coro, if any */
140	};	197	};
141		198
142	typedef struct coro *Coro__State;	199	typedef struct coro *Coro__State;
143	typedef struct coro *Coro__State_or_hashref;	200	typedef struct coro *Coro__State_or_hashref;
144		201
145	/* mostly copied from op.c:cv_clone2 */	202	/ Coro ******************************************************************/
146	STATIC AV *	203
147	clone_padlist (pTHX_ AV *protopadlist)	204	#define PRIO_MAX 3
		205	#define PRIO_HIGH 1
		206	#define PRIO_NORMAL 0
		207	#define PRIO_LOW -1
		208	#define PRIO_IDLE -3
		209	#define PRIO_MIN -4
		210
		211	/* for Coro.pm */
		212	static SV *coro_current;
		213	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		214	static int coro_nready;
		215	static struct coro *coro_first;
		216
		217	/ lowlevel stuff ********************************************************/
		218
		219	static AV *
		220	coro_clone_padlist (pTHX_ CV *cv)
148	{	221	{
149	AV *av;	222	AV *padlist = CvPADLIST (cv);
150	I32 ix;
151	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
152	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
153	SV **pname = AvARRAY (protopad_name);
154	SV **ppad = AvARRAY (protopad);
155	I32 fname = AvFILLp (protopad_name);
156	I32 fpad = AvFILLp (protopad);
157	AV newpadlist, newpad_name, *newpad;	223	AV newpadlist, newpad;
158	SV **npad;
159
160	newpad_name = newAV ();
161	for (ix = fname; ix >= 0; ix--)
162	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
163
164	newpad = newAV ();
165	av_fill (newpad, AvFILLp (protopad));
166	npad = AvARRAY (newpad);
167		224
168	newpadlist = newAV ();	225	newpadlist = newAV ();
169	AvREAL_off (newpadlist);	226	AvREAL_off (newpadlist);
170	av_store (newpadlist, 0, (SV *) newpad_name);	227	#if PERL_VERSION_ATLEAST (5,9,0)
		228	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		229	#else
		230	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		231	#endif
		232	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		233	--AvFILLp (padlist);
		234
		235	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
171	av_store (newpadlist, 1, (SV *) newpad);	236	av_store (newpadlist, 1, (SV *)newpad);
172
173	av = newAV (); /* will be @_ */
174	av_extend (av, 0);
175	av_store (newpad, 0, (SV *) av);
176	AvREIFY_on (av);
177
178	for (ix = fpad; ix > 0; ix--)
179	{
180	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
181
182	if (namesv && namesv != &PL_sv_undef)
183	{
184	char name = SvPVX (namesv); / XXX */
185
186	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')
187	{ /* lexical from outside? */
188	npad[ix] = SvREFCNT_inc (ppad[ix]);
189	}
190	else
191	{ /* our own lexical */
192	SV *sv;
193	if (*name == '&')
194	sv = SvREFCNT_inc (ppad[ix]);
195	else if (*name == '@')
196	sv = (SV *) newAV ();
197	else if (*name == '%')
198	sv = (SV *) newHV ();
199	else
200	sv = NEWSV (0, 0);
201
202	#ifdef SvPADBUSY
203	if (!SvPADBUSY (sv))
204	#endif
205	SvPADMY_on (sv);
206
207	npad[ix] = sv;
208	}
209	}
210	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
211	{
212	npad[ix] = SvREFCNT_inc (ppad[ix]);
213	}
214	else
215	{
216	SV *sv = NEWSV (0, 0);
217	SvPADTMP_on (sv);
218	npad[ix] = sv;
219	}
220	}
221
222	#if 0 /* return -ENOTUNDERSTOOD */
223	/* Now that vars are all in place, clone nested closures. */
224
225	for (ix = fpad; ix > 0; ix--) {
226	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
227	if (namesv
228	&& namesv != &PL_sv_undef
229	&& !(SvFLAGS(namesv) & SVf_FAKE)
230	&& *SvPVX(namesv) == '&'
231	&& CvCLONE(ppad[ix]))
232	{
233	CV kid = cv_clone((CV)ppad[ix]);
234	SvREFCNT_dec(ppad[ix]);
235	CvCLONE_on(kid);
236	SvPADMY_on(kid);
237	npad[ix] = (SV*)kid;
238	}
239	}
240	#endif
241		237
242	return newpadlist;	238	return newpadlist;
243	}	239	}
244		240
245	STATIC void	241	static void
246	free_padlist (pTHX_ AV *padlist)	242	free_padlist (pTHX_ AV *padlist)
247	{	243	{
248	/* may be during global destruction */	244	/* may be during global destruction */
249	if (SvREFCNT (padlist))	245	if (SvREFCNT (padlist))
250	{	246	{
…		…
264		260
265	SvREFCNT_dec ((SV*)padlist);	261	SvREFCNT_dec ((SV*)padlist);
266	}	262	}
267	}	263	}
268		264
269	STATIC int	265	static int
270	coro_cv_free (pTHX_ SV sv, MAGIC mg)	266	coro_cv_free (pTHX_ SV sv, MAGIC mg)
271	{	267	{
272	AV *padlist;	268	AV *padlist;
273	AV av = (AV )mg->mg_obj;	269	AV av = (AV )mg->mg_obj;
274		270
275	/* casting is fun. */	271	/* casting is fun. */
276	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	272	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
277	free_padlist (aTHX_ padlist);	273	free_padlist (aTHX_ padlist);
278		274
279	SvREFCNT_dec (av);	275	SvREFCNT_dec (av);
		276
		277	return 0;
280	}	278	}
281		279
282	#define PERL_MAGIC_coro PERL_MAGIC_ext	280	#define PERL_MAGIC_coro PERL_MAGIC_ext
283		281
284	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
285		283
		284	#define CORO_MAGIC(cv) \
		285	SvMAGIC (cv) \
		286	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		287	? SvMAGIC (cv) \
		288	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		289	: 0
		290
286	/* the next two functions merely cache the padlists */	291	/* the next two functions merely cache the padlists */
287	STATIC void	292	static void
288	get_padlist (pTHX_ CV *cv)	293	get_padlist (pTHX_ CV *cv)
289	{	294	{
290	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	295	MAGIC *mg = CORO_MAGIC (cv);
		296	AV *av;
291		297
292	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	298	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
293	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	299	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
294	else	300	else
		301	{
		302	#if CORO_PREFER_PERL_FUNCTIONS
		303	/* this is probably cleaner, but also slower? */
		304	CV *cp = Perl_cv_clone (cv);
		305	CvPADLIST (cv) = CvPADLIST (cp);
		306	CvPADLIST (cp) = 0;
		307	SvREFCNT_dec (cp);
		308	#else
295	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	309	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		310	#endif
		311	}
296	}	312	}
297		313
298	STATIC void	314	static void
299	put_padlist (pTHX_ CV *cv)	315	put_padlist (pTHX_ CV *cv)
300	{	316	{
301	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	317	MAGIC *mg = CORO_MAGIC (cv);
		318	AV *av;
302		319
303	if (!mg)	320	if (!mg)
304	{	321	{
305	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	322	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
306	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	323	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
307	mg->mg_virtual = &vtbl_coro;	324	mg->mg_virtual = &vtbl_coro;
308	mg->mg_obj = (SV *)newAV ();	325	mg->mg_obj = (SV *)newAV ();
309	}	326	}
310		327
311	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	328	av = (AV *)mg->mg_obj;
		329
		330	if (AvFILLp (av) >= AvMAX (av))
		331	av_extend (av, AvMAX (av) + 1);
		332
		333	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
312	}	334	}
		335
		336	/ load & save, init *****************************************************/
313		337
314	#define SB do {	338	#define SB do {
315	#define SE } while (0)	339	#define SE } while (0)
316		340
317	#define LOAD(state) load_state(aTHX_ (state));
318	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
319
320	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	341	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
321		342
322	static void	343	static void
323	load_state(pTHX_ Coro__State c)	344	load_perl (pTHX_ Coro__State c)
324	{	345	{
325	PL_dowarn = c->dowarn;	346	#define VAR(name,type) PL_ ## name = c->name;
326	PL_in_eval = c->in_eval;	347	# include "state.h"
327		348	#undef VAR
328	PL_curstackinfo = c->curstackinfo;
329	PL_curstack = c->curstack;
330	PL_mainstack = c->mainstack;
331	PL_stack_sp = c->stack_sp;
332	PL_op = c->op;
333	PL_curpad = c->curpad;
334	PL_comppad = c->comppad;
335	PL_compcv = c->compcv;
336	PL_stack_base = c->stack_base;
337	PL_stack_max = c->stack_max;
338	PL_tmps_stack = c->tmps_stack;
339	PL_tmps_floor = c->tmps_floor;
340	PL_tmps_ix = c->tmps_ix;
341	PL_tmps_max = c->tmps_max;
342	PL_markstack = c->markstack;
343	PL_markstack_ptr = c->markstack_ptr;
344	PL_markstack_max = c->markstack_max;
345	PL_scopestack = c->scopestack;
346	PL_scopestack_ix = c->scopestack_ix;
347	PL_scopestack_max = c->scopestack_max;
348	PL_savestack = c->savestack;
349	PL_savestack_ix = c->savestack_ix;
350	PL_savestack_max = c->savestack_max;
351	#if PERL_VERSION < 9
352	PL_retstack = c->retstack;
353	PL_retstack_ix = c->retstack_ix;
354	PL_retstack_max = c->retstack_max;
355	#endif
356	PL_curpm = c->curpm;
357	PL_curcop = c->curcop;
358	PL_top_env = c->top_env;
359		349
360	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
361	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
362	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	352	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		353	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		354
		355	if (c->irssv)
		356	{
		357	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
		358	{
		359	SvREFCNT_dec (c->irssv);
		360	c->irssv = 0;
		361	}
		362	else
		363	{
		364	REPLACE_SV (PL_rs, c->irssv);
		365	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		366	sv_setsv (c->irssv_sv, PL_rs);
		367	}
		368	}
363		369
364	{	370	{
365	dSP;	371	dSP;
366	CV *cv;	372	CV *cv;
367		373
368	/* now do the ugly restore mess */	374	/* now do the ugly restore mess */
369	while ((cv = (CV *)POPs))	375	while ((cv = (CV *)POPs))
370	{	376	{
371	AV padlist = (AV )POPs;
372
373	if (padlist)
374	{
375	put_padlist (aTHX_ cv); /* mark this padlist as available */	377	put_padlist (aTHX_ cv); /* mark this padlist as available */
376	CvPADLIST(cv) = padlist;	378	CvDEPTH (cv) = PTR2IV (POPs);
377	}	379	CvPADLIST (cv) = (AV *)POPs;
378
379	++CvDEPTH(cv);
380	}	380	}
381		381
382	PUTBACK;	382	PUTBACK;
383	}	383	}
384	}	384	}
385		385
386	static void	386	static void
387	save_state(pTHX_ Coro__State c, int flags)	387	save_perl (pTHX_ Coro__State c)
388	{	388	{
389	{	389	{
390	dSP;	390	dSP;
391	I32 cxix = cxstack_ix;	391	I32 cxix = cxstack_ix;
392	PERL_CONTEXT *ccstk = cxstack;	392	PERL_CONTEXT *ccstk = cxstack;
…		…
395	/*	395	/*
396	* the worst thing you can imagine happens first - we have to save	396	* the worst thing you can imagine happens first - we have to save
397	* (and reinitialize) all cv's in the whole callchain :(	397	* (and reinitialize) all cv's in the whole callchain :(
398	*/	398	*/
399		399
400	PUSHs (Nullsv);	400	XPUSHs (Nullsv);
401	/* this loop was inspired by pp_caller */	401	/* this loop was inspired by pp_caller */
402	for (;;)	402	for (;;)
403	{	403	{
404	while (cxix >= 0)	404	while (cxix >= 0)
405	{	405	{
406	PERL_CONTEXT *cx = &ccstk[cxix--];	406	PERL_CONTEXT *cx = &ccstk[cxix--];
407		407
408	if (CxTYPE(cx) == CXt_SUB)	408	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
409	{	409	{
410	CV *cv = cx->blk_sub.cv;	410	CV *cv = cx->blk_sub.cv;
		411
411	if (CvDEPTH(cv))	412	if (CvDEPTH (cv))
412	{	413	{
413	EXTEND (SP, CvDEPTH(cv)*2);	414	EXTEND (SP, 3);
414
415	while (--CvDEPTH(cv))
416	{
417	/* this tells the restore code to increment CvDEPTH */
418	PUSHs (Nullsv);
419	PUSHs ((SV *)cv);
420	}
421
422	PUSHs ((SV *)CvPADLIST(cv));	415	PUSHs ((SV *)CvPADLIST (cv));
		416	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
423	PUSHs ((SV *)cv);	417	PUSHs ((SV *)cv);
424		418
		419	CvDEPTH (cv) = 0;
425	get_padlist (aTHX_ cv); /* this is a monster */	420	get_padlist (aTHX_ cv);
426	}	421	}
427	}	422	}
428	#ifdef CXt_FORMAT
429	else if (CxTYPE(cx) == CXt_FORMAT)
430	{
431	/* I never used formats, so how should I know how these are implemented? */
432	/* my bold guess is as a simple, plain sub... */
433	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
434	}
435	#endif
436	}	423	}
437		424
438	if (top_si->si_type == PERLSI_MAIN)	425	if (top_si->si_type == PERLSI_MAIN)
439	break;	426	break;
440		427
…		…
444	}	431	}
445		432
446	PUTBACK;	433	PUTBACK;
447	}	434	}
448		435
449	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	436	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
450	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	437	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
451	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	438	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		439	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		440	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
452		441
453	c->dowarn = PL_dowarn;	442	#define VAR(name,type)c->name = PL_ ## name;
454	c->in_eval = PL_in_eval;	443	# include "state.h"
455		444	#undef VAR
456	c->curstackinfo = PL_curstackinfo;
457	c->curstack = PL_curstack;
458	c->mainstack = PL_mainstack;
459	c->stack_sp = PL_stack_sp;
460	c->op = PL_op;
461	c->curpad = PL_curpad;
462	c->comppad = PL_comppad;
463	c->compcv = PL_compcv;
464	c->stack_base = PL_stack_base;
465	c->stack_max = PL_stack_max;
466	c->tmps_stack = PL_tmps_stack;
467	c->tmps_floor = PL_tmps_floor;
468	c->tmps_ix = PL_tmps_ix;
469	c->tmps_max = PL_tmps_max;
470	c->markstack = PL_markstack;
471	c->markstack_ptr = PL_markstack_ptr;
472	c->markstack_max = PL_markstack_max;
473	c->scopestack = PL_scopestack;
474	c->scopestack_ix = PL_scopestack_ix;
475	c->scopestack_max = PL_scopestack_max;
476	c->savestack = PL_savestack;
477	c->savestack_ix = PL_savestack_ix;
478	c->savestack_max = PL_savestack_max;
479	#if PERL_VERSION < 9
480	c->retstack = PL_retstack;
481	c->retstack_ix = PL_retstack_ix;
482	c->retstack_max = PL_retstack_max;
483	#endif
484	c->curpm = PL_curpm;
485	c->curcop = PL_curcop;
486	c->top_env = PL_top_env;
487	}	445	}
488		446
489	/*	447	/*
490	* allocate various perl stacks. This is an exact copy	448	* allocate various perl stacks. This is an exact copy
491	* of perl.c:init_stacks, except that it uses less memory	449	* of perl.c:init_stacks, except that it uses less memory
492	* on the (sometimes correct) assumption that coroutines do	450	* on the (sometimes correct) assumption that coroutines do
493	* not usually need a lot of stackspace.	451	* not usually need a lot of stackspace.
494	*/	452	*/
495	STATIC void	453	#if CORO_PREFER_PERL_FUNCTIONS
		454	# define coro_init_stacks init_stacks
		455	#else
		456	static void
496	coro_init_stacks (pTHX)	457	coro_init_stacks (pTHX)
497	{	458	{
498	LOCK;	459	PL_curstackinfo = new_stackinfo(64, 6);
499
500	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
501	PL_curstackinfo->si_type = PERLSI_MAIN;	460	PL_curstackinfo->si_type = PERLSI_MAIN;
502	PL_curstack = PL_curstackinfo->si_stack;	461	PL_curstack = PL_curstackinfo->si_stack;
503	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	462	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
504		463
505	PL_stack_base = AvARRAY(PL_curstack);	464	PL_stack_base = AvARRAY(PL_curstack);
506	PL_stack_sp = PL_stack_base;	465	PL_stack_sp = PL_stack_base;
507	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	466	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
508		467
509	New(50,PL_tmps_stack,96,SV*);	468	New(50,PL_tmps_stack,64,SV*);
510	PL_tmps_floor = -1;	469	PL_tmps_floor = -1;
511	PL_tmps_ix = -1;	470	PL_tmps_ix = -1;
512	PL_tmps_max = 96;	471	PL_tmps_max = 64;
513		472
514	New(54,PL_markstack,16,I32);	473	New(54,PL_markstack,16,I32);
515	PL_markstack_ptr = PL_markstack;	474	PL_markstack_ptr = PL_markstack;
516	PL_markstack_max = PL_markstack + 16;	475	PL_markstack_max = PL_markstack + 16;
517		476
…		…
521		480
522	New(54,PL_scopestack,16,I32);	481	New(54,PL_scopestack,16,I32);
523	PL_scopestack_ix = 0;	482	PL_scopestack_ix = 0;
524	PL_scopestack_max = 16;	483	PL_scopestack_max = 16;
525		484
526	New(54,PL_savestack,96,ANY);	485	New(54,PL_savestack,64,ANY);
527	PL_savestack_ix = 0;	486	PL_savestack_ix = 0;
528	PL_savestack_max = 96;	487	PL_savestack_max = 64;
529		488
530	#if PERL_VERSION < 9	489	#if !PERL_VERSION_ATLEAST (5,9,0)
531	New(54,PL_retstack,8,OP*);	490	New(54,PL_retstack,4,OP*);
532	PL_retstack_ix = 0;	491	PL_retstack_ix = 0;
533	PL_retstack_max = 8;	492	PL_retstack_max = 4;
534	#endif	493	#endif
535
536	UNLOCK;
537	}	494	}
		495	#endif
538		496
539	/*	497	/*
540	* destroy the stacks, the callchain etc...	498	* destroy the stacks, the callchain etc...
541	*/	499	*/
542	STATIC void	500	static void
543	destroy_stacks(pTHX)	501	coro_destroy_stacks (pTHX)
544	{	502	{
545	if (!IN_DESTRUCT)	503	if (!IN_DESTRUCT)
546	{	504	{
547	/* is this ugly, I ask? */	505	/* restore all saved variables and stuff */
548	LEAVE_SCOPE (0);	506	LEAVE_SCOPE (0);
		507	assert (PL_tmps_floor == -1);
549		508
550	/* sure it is, but more important: is it correct?? :/ */	509	/* free all temporaries */
551	FREETMPS;	510	FREETMPS;
		511	assert (PL_tmps_ix == -1);
552		512
		513	/* unwind all extra stacks */
553	/POPSTACK_TO (PL_mainstack);//D//use/	514	POPSTACK_TO (PL_mainstack);
		515
		516	/* unwind main stack */
		517	dounwind (-1);
554	}	518	}
555		519
556	while (PL_curstackinfo->si_next)	520	while (PL_curstackinfo->si_next)
557	PL_curstackinfo = PL_curstackinfo->si_next;	521	PL_curstackinfo = PL_curstackinfo->si_next;
558		522
559	while (PL_curstackinfo)	523	while (PL_curstackinfo)
560	{	524	{
561	PERL_SI *p = PL_curstackinfo->si_prev;	525	PERL_SI *p = PL_curstackinfo->si_prev;
562		526
563	{ /D//remove/
564	dSP;
565	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
566	PUTBACK; /* possibly superfluous */
567	}
568
569	if (!IN_DESTRUCT)	527	if (!IN_DESTRUCT)
570	{
571	dounwind (-1);/D//remove/
572	SvREFCNT_dec (PL_curstackinfo->si_stack);	528	SvREFCNT_dec (PL_curstackinfo->si_stack);
573	}
574		529
575	Safefree (PL_curstackinfo->si_cxstack);	530	Safefree (PL_curstackinfo->si_cxstack);
576	Safefree (PL_curstackinfo);	531	Safefree (PL_curstackinfo);
577	PL_curstackinfo = p;	532	PL_curstackinfo = p;
578	}	533	}
579		534
580	Safefree (PL_tmps_stack);	535	Safefree (PL_tmps_stack);
581	Safefree (PL_markstack);	536	Safefree (PL_markstack);
582	Safefree (PL_scopestack);	537	Safefree (PL_scopestack);
583	Safefree (PL_savestack);	538	Safefree (PL_savestack);
584	#if PERL_VERSION < 9	539	#if !PERL_VERSION_ATLEAST (5,9,0)
585	Safefree (PL_retstack);	540	Safefree (PL_retstack);
586	#endif	541	#endif
587	}	542	}
588		543
589	static void	544	static size_t
590	allocate_stack (Coro__State ctx, int alloc)	545	coro_rss (struct coro *coro)
591	{	546	{
592	coro_stack *stack;	547	size_t rss = sizeof (coro);
593		548
594	New (0, stack, 1, coro_stack);	549	if (coro->mainstack)
595
596	stack->refcnt = 1;
597	stack->usecnt = 1;
598	stack->gencnt = ctx->gencnt = 0;
599
600	if (alloc)
601	{	550	{
602	#if HAVE_MMAP	551	if (coro->flags & CF_RUNNING)
603	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
604	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
605	if (stack->sptr == (void *)-1)
606	#endif
607	{	552	{
608	/FIXME//D//* reasonable stack size! */	553	#define VAR(name,type)coro->name = PL_ ## name;
609	stack->ssize = - (STACKSIZE * sizeof (long));	554	# include "state.h"
610	New (0, stack->sptr, STACKSIZE, long);	555	#undef VAR
611	}	556	}
612	}
613	else
614	stack->sptr = 0;
615		557
616	ctx->stack = stack;	558	rss += sizeof (coro->curstackinfo);
617	}	559	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		560	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		561	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		562	rss += coro->tmps_max * sizeof (SV *);
		563	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		564	rss += coro->scopestack_max * sizeof (I32);
		565	rss += coro->savestack_max * sizeof (ANY);
618		566
619	static void	567	#if !PERL_VERSION_ATLEAST (5,9,0)
620	deallocate_stack (Coro__State ctx)	568	rss += coro->retstack_max * sizeof (OP *);
621	{	569	#endif
622	coro_stack *stack = ctx->stack;
623
624	ctx->stack = 0;
625
626	if (stack)
627	{	570	}
628	if (!--stack->refcnt)
629	{
630	#ifdef HAVE_MMAP
631	if (stack->ssize > 0 && stack->sptr)
632	munmap (stack->sptr, stack->ssize);
633	else
634	#endif
635	Safefree (stack->sptr);
636		571
637	Safefree (stack);	572	return rss;
638	}
639	else if (ctx->gencnt == stack->gencnt)
640	--stack->usecnt;
641	}
642	}	573	}
643		574
		575	/ coroutine stack handling **********************************************/
		576
644	static void	577	static void
645	setup_coro (void *arg)	578	setup_coro (pTHX_ struct coro *coro)
646	{	579	{
647	/*	580	/*
648	* emulate part of the perl startup here.	581	* emulate part of the perl startup here.
649	*/	582	*/
		583	coro_init_stacks (aTHX);
		584
		585	PL_curcop = &PL_compiling;
		586	PL_in_eval = EVAL_NULL;
		587	PL_comppad = 0;
		588	PL_curpm = 0;
		589	PL_localizing = 0;
		590	PL_dirty = 0;
		591	PL_restartop = 0;
		592
		593	{
		594	dSP;
		595	LOGOP myop;
		596
		597	SvREFCNT_dec (GvAV (PL_defgv));
		598	GvAV (PL_defgv) = coro->args; coro->args = 0;
		599
		600	Zero (&myop, 1, LOGOP);
		601	myop.op_next = Nullop;
		602	myop.op_flags = OPf_WANT_VOID;
		603
		604	PUSHMARK (SP);
		605	XPUSHs (av_shift (GvAV (PL_defgv)));
		606	PUTBACK;
		607	PL_op = (OP *)&myop;
		608	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		609	SPAGAIN;
		610	}
		611
		612	ENTER; /* necessary e.g. for dounwind */
		613	}
		614
		615	static void
		616	free_coro_mortal (pTHX)
		617	{
		618	if (coro_mortal)
		619	{
		620	SvREFCNT_dec (coro_mortal);
		621	coro_mortal = 0;
		622	}
		623	}
		624
		625	/* inject a fake call to Coro::State::_cctx_init into the execution */
		626	/* _cctx_init should be careful, as it could be called at almost any time */
		627	/* during execution of a perl program */
		628	static void NOINLINE
		629	prepare_cctx (pTHX_ coro_cctx *cctx)
		630	{
		631	dSP;
		632	LOGOP myop;
		633
		634	Zero (&myop, 1, LOGOP);
		635	myop.op_next = PL_op;
		636	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		637
		638	PUSHMARK (SP);
		639	EXTEND (SP, 2);
		640	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		641	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		642	PUTBACK;
		643	PL_op = (OP *)&myop;
		644	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		645	SPAGAIN;
		646	}
		647
		648	/*
		649	* this is a _very_ stripped down perl interpreter ;)
		650	*/
		651	static void
		652	coro_run (void *arg)
		653	{
650	dTHX;	654	dTHX;
651	dSP;
652	Coro__State ctx = (Coro__State)arg;
653	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
654		655
655	coro_init_stacks (aTHX);	656	/* coro_run is the alternative tail of transfer(), so unlock here. */
656	/PL_curcop = 0;/	657	UNLOCK;
657	/PL_in_eval = PL_in_eval;/ /* inherit */
658	SvREFCNT_dec (GvAV (PL_defgv));
659	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
660		658
661	SPAGAIN;	659	PL_top_env = &PL_start_env;
662		660
663	if (ctx->stack)	661	/* inject a fake subroutine call to cctx_init */
664	{	662	prepare_cctx (aTHX_ (coro_cctx *)arg);
665	ctx->cursp = 0;
666		663
667	PUSHMARK(SP);	664	/* somebody or something will hit me for both perl_run and PL_restartop */
668	PUTBACK;	665	PL_restartop = PL_op;
669	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);	666	perl_run (PL_curinterp);
670		667
671	if (SvTRUE (ERRSV))	668	/*
672	croak (NULL);	669	* If perl-run returns we assume exit() was being called or the coro
673	else	670	* fell off the end, which seems to be the only valid (non-bug)
674	croak ("FATAL: CCTXT coroutine returned!");	671	* reason for perl_run to return. We try to exit by jumping to the
		672	* bootstrap-time "top" top_env, as we cannot restore the "main"
		673	* coroutine as Coro has no such concept
		674	*/
		675	PL_top_env = main_top_env;
		676	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		677	}
		678
		679	static coro_cctx *
		680	cctx_new ()
		681	{
		682	coro_cctx *cctx;
		683	void *stack_start;
		684	size_t stack_size;
		685
		686	++cctx_count;
		687
		688	Newz (0, cctx, 1, coro_cctx);
		689
		690	#if HAVE_MMAP
		691
		692	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		693	/* mmap supposedly does allocate-on-write for us */
		694	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		695
		696	if (cctx->sptr != (void *)-1)
		697	{
		698	# if CORO_STACKGUARD
		699	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		700	# endif
		701	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		702	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		703	cctx->mapped = 1;
675	}	704	}
676	else	705	else
677	{	706	#endif
678	UNOP myop;
679
680	PL_op = (OP *)&myop;
681
682	Zero(&myop, 1, UNOP);
683	myop.op_next = Nullop;
684	myop.op_flags = OPf_WANT_VOID;
685
686	PUSHMARK(SP);
687	XPUSHs (sub_init);
688	/*
689	* the next line is slightly wrong, as PL_op->op_next
690	* is actually being executed so we skip the first op.
691	* that doesn't matter, though, since it is only
692	* pp_nextstate and we never return...
693	* ah yes, and I don't care anyways ;)
694	*/
695	PUTBACK;
696	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
697	SPAGAIN;
698
699	ENTER; /* necessary e.g. for dounwind */
700	}	707	{
701	}	708	cctx->ssize = coro_stacksize * (long)sizeof (long);
		709	New (0, cctx->sptr, coro_stacksize, long);
702		710
703	static void	711	if (!cctx->sptr)
704	continue_coro (void *arg)	712	{
705	{	713	perror ("FATAL: unable to allocate stack for coroutine");
706	/*	714	_exit (EXIT_FAILURE);
707	* this is a _very_ stripped down perl interpreter ;)	715	}
708	*/
709	dTHX;
710	Coro__State ctx = (Coro__State)arg;
711	JMPENV coro_start_env;
712		716
713	PL_top_env = &ctx->start_env;	717	stack_start = cctx->sptr;
		718	stack_size = cctx->ssize;
		719	}
714		720
715	ctx->cursp = 0;	721	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		722	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		723
		724	return cctx;
		725	}
		726
		727	static void
		728	cctx_destroy (coro_cctx *cctx)
		729	{
		730	if (!cctx)
		731	return;
		732
		733	--cctx_count;
		734
		735	#if CORO_USE_VALGRIND
		736	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		737	#endif
		738
		739	#if HAVE_MMAP
		740	if (cctx->mapped)
		741	munmap (cctx->sptr, cctx->ssize);
		742	else
		743	#endif
		744	Safefree (cctx->sptr);
		745
		746	Safefree (cctx);
		747	}
		748
		749	static coro_cctx *
		750	cctx_get (pTHX)
		751	{
		752	while (cctx_first)
		753	{
		754	coro_cctx *cctx = cctx_first;
		755	cctx_first = cctx->next;
		756	--cctx_idle;
		757
		758	if (cctx->ssize >= coro_stacksize)
		759	return cctx;
		760
		761	cctx_destroy (cctx);
		762	}
		763
716	PL_op = PL_op->op_next;	764	PL_op = PL_op->op_next;
717	CALLRUNOPS(aTHX);	765	return cctx_new ();
718
719	abort ();
720	}	766	}
721		767
722	STATIC void	768	static void
		769	cctx_put (coro_cctx *cctx)
		770	{
		771	/* free another cctx if overlimit */
		772	if (cctx_idle >= MAX_IDLE_CCTX)
		773	{
		774	coro_cctx *first = cctx_first;
		775	cctx_first = first->next;
		776	--cctx_idle;
		777
		778	assert (!first->inuse);
		779	cctx_destroy (first);
		780	}
		781
		782	++cctx_idle;
		783	cctx->next = cctx_first;
		784	cctx_first = cctx;
		785	}
		786
		787	/ coroutine switching ***************************************************/
		788
		789	/* never call directly, always through the coro_state_transfer global variable */
		790	static void NOINLINE
723	transfer (pTHX_ struct coro prev, struct coro next, int flags)	791	transfer (pTHX_ struct coro prev, struct coro next)
724	{	792	{
725	dSTACKLEVEL;	793	dSTACKLEVEL;
726		794
		795	/* sometimes transfer is only called to set idle_sp */
		796	if (!next)
		797	{
		798	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		799	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		800	}
727	if (prev != next)	801	else if (prev != next)
728	{	802	{
729	if (next->mainstack)	803	coro_cctx *prev__cctx;
		804
		805	if (prev->flags & CF_NEW)
730	{	806	{
731	LOCK;	807	/* create a new empty context */
732	SAVE (prev, flags);	808	Newz (0, prev->cctx, 1, coro_cctx);
733	LOAD (next);	809	prev->cctx->inuse = 1;
734	UNLOCK;	810	prev->flags &= ~CF_NEW;
735		811	prev->flags \|= CF_RUNNING;
736	/* mark this state as in-use */
737	next->mainstack = 0;
738	next->tmps_ix = -2;
739
740	/* stacklevel changed? if yes, grab the stack for us! */
741	if (flags & TRANSFER_SAVE_CCTXT)
742	{
743	if (!prev->stack)
744	allocate_stack (prev, 0);
745	else if (prev->cursp != stacklevel
746	&& prev->stack->usecnt > 1)
747	{
748	prev->gencnt = ++prev->stack->gencnt;
749	prev->stack->usecnt = 1;
750	}
751
752	/* has our stack been invalidated? */
753	if (next->stack && next->stack->gencnt != next->gencnt)
754	{
755	deallocate_stack (next);
756	allocate_stack (next, 1);
757	coro_create (&(next->stack->cctx),
758	continue_coro, (void *)next,
759	next->stack->sptr, labs (next->stack->ssize));
760	}
761
762	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
763	prev->cursp = stacklevel;
764	/* don't add any code here */
765	}
766	else
767	next->cursp = stacklevel;
768	}	812	}
769	else if (next->tmps_ix == -2)	813
770	croak ("tried to transfer to running coroutine");	814	/TODO: must not croak here /
		815	if (!prev->flags & CF_RUNNING)
		816	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		817
		818	if (next->flags & CF_RUNNING)
		819	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		820
		821	if (next->flags & CF_DESTROYED)
		822	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		823
		824	prev->flags &= ~CF_RUNNING;
		825	next->flags \|= CF_RUNNING;
		826
		827	LOCK;
		828
		829	if (next->flags & CF_NEW)
		830	{
		831	/* need to start coroutine */
		832	next->flags &= ~CF_NEW;
		833	/* first get rid of the old state */
		834	save_perl (aTHX_ prev);
		835	/* setup coroutine call */
		836	setup_coro (aTHX_ next);
		837	/* need a new stack */
		838	assert (!next->cctx);
		839	}
771	else	840	else
772	{	841	{
773	LOCK;	842	/* coroutine already started */
774	SAVE (prev, -1); /* first get rid of the old state */	843	save_perl (aTHX_ prev);
775	UNLOCK;	844	load_perl (aTHX_ next);
776
777	if (flags & TRANSFER_SAVE_CCTXT)
778	{
779	if (!prev->stack)
780	allocate_stack (prev, 0);
781
782	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
783	{
784	PL_top_env = &next->start_env;
785
786	setup_coro (next);
787	next->cursp = stacklevel;
788
789	prev->stack->refcnt++;
790	prev->stack->usecnt++;
791	next->stack = prev->stack;
792	next->gencnt = prev->gencnt;
793	}
794	else
795	{
796	assert (!next->stack);
797	allocate_stack (next, 1);
798	coro_create (&(next->stack->cctx),
799	setup_coro, (void *)next,
800	next->stack->sptr, labs (next->stack->ssize));
801	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
802	prev->cursp = stacklevel;
803	/* don't add any code here */
804	}
805	}
806	else
807	{
808	setup_coro (next);
809	next->cursp = stacklevel;
810	}
811	}	845	}
812	}
813		846
814	LOCK;	847	prev__cctx = prev->cctx;
815	if (coro_mortal)	848
816	{	849	/* possibly "free" the cctx */
817	SvREFCNT_dec (coro_mortal);	850	if (prev__cctx->idle_sp == STACKLEVEL)
818	coro_mortal = 0;	851	{
819	}	852	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		853	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		854
		855	prev->cctx = 0;
		856
		857	cctx_put (prev__cctx);
		858	prev__cctx->inuse = 0;
		859	}
		860
		861	if (!next->cctx)
		862	{
		863	next->cctx = cctx_get (aTHX);
		864	assert (!next->cctx->inuse);
		865	next->cctx->inuse = 1;
		866	}
		867
		868	if (prev__cctx != next->cctx)
		869	{
		870	prev__cctx->top_env = PL_top_env;
		871	PL_top_env = next->cctx->top_env;
		872	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		873	}
		874
		875	free_coro_mortal (aTHX);
820	UNLOCK;	876	UNLOCK;
		877	}
821	}	878	}
822		879
823	#define SV_CORO(sv,func) \	880	struct transfer_args
824	do { \	881	{
825	if (SvROK (sv)) \	882	struct coro prev, next;
826	sv = SvRV (sv); \	883	};
827	\
828	if (SvTYPE (sv) == SVt_PVHV) \
829	{ \
830	HE he = hv_fetch_ent ((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
831	\
832	if (!he) \
833	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
834	\
835	(sv) = SvRV (HeVAL(he)); \
836	} \
837	\
838	/* must also be changed inside Coro::Cont::yield */ \
839	if (!SvOBJECT (sv) \|\| SvSTASH (sv) != coro_state_stash) \
840	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
841	\
842	} while(0)
843		884
844	#define SvSTATE(sv) (struct coro *)SvIV (sv)	885	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
845		886
		887	/ high level stuff ******************************************************/
		888
846	static void	889	static int
		890	coro_state_destroy (pTHX_ struct coro *coro)
		891	{
		892	if (coro->flags & CF_DESTROYED)
		893	return 0;
		894
		895	coro->flags \|= CF_DESTROYED;
		896
		897	if (coro->flags & CF_READY)
		898	{
		899	/* reduce nready, as destroying a ready coro effectively unreadies it */
		900	/* alternative: look through all ready queues and remove the coro */
		901	LOCK;
		902	--coro_nready;
		903	UNLOCK;
		904	}
		905	else
		906	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
		907
		908	if (coro->mainstack && coro->mainstack != main_mainstack)
		909	{
		910	struct coro temp;
		911
		912	assert (!(coro->flags & CF_RUNNING));
		913
		914	Zero (&temp, 1, struct coro);
		915	temp.save = CORO_SAVE_ALL;
		916
		917	if (coro->flags & CF_RUNNING)
		918	croak ("FATAL: tried to destroy currently running coroutine");
		919
		920	save_perl (aTHX_ &temp);
		921	load_perl (aTHX_ coro);
		922
		923	coro_destroy_stacks (aTHX);
		924
		925	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		926
		927	coro->mainstack = 0;
		928	}
		929
		930	cctx_destroy (coro->cctx);
		931	SvREFCNT_dec (coro->args);
		932
		933	if (coro->next) coro->next->prev = coro->prev;
		934	if (coro->prev) coro->prev->next = coro->next;
		935	if (coro == coro_first) coro_first = coro->next;
		936
		937	return 1;
		938	}
		939
		940	static int
		941	coro_state_free (pTHX_ SV sv, MAGIC mg)
		942	{
		943	struct coro coro = (struct coro )mg->mg_ptr;
		944	mg->mg_ptr = 0;
		945
		946	coro->hv = 0;
		947
		948	if (--coro->refcnt < 0)
		949	{
		950	coro_state_destroy (aTHX_ coro);
		951	Safefree (coro);
		952	}
		953
		954	return 0;
		955	}
		956
		957	static int
		958	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		959	{
		960	struct coro coro = (struct coro )mg->mg_ptr;
		961
		962	++coro->refcnt;
		963
		964	return 0;
		965	}
		966
		967	static MGVTBL coro_state_vtbl = {
		968	0, 0, 0, 0,
		969	coro_state_free,
		970	0,
		971	#ifdef MGf_DUP
		972	coro_state_dup,
		973	#else
		974	# define MGf_DUP 0
		975	#endif
		976	};
		977
		978	static struct coro *
		979	SvSTATE_ (pTHX_ SV *coro)
		980	{
		981	HV *stash;
		982	MAGIC *mg;
		983
		984	if (SvROK (coro))
		985	coro = SvRV (coro);
		986
		987	stash = SvSTASH (coro);
		988	if (stash != coro_stash && stash != coro_state_stash)
		989	{
		990	/* very slow, but rare, check */
		991	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		992	croak ("Coro::State object required");
		993	}
		994
		995	mg = CORO_MAGIC (coro);
		996	return (struct coro *)mg->mg_ptr;
		997	}
		998
		999	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		1000
		1001	static void
		1002	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1003	{
		1004	ta->prev = SvSTATE (prev_sv);
		1005	ta->next = SvSTATE (next_sv);
		1006	}
		1007
		1008	static void
847	api_transfer(pTHX_ SV prev, SV next, int flags)	1009	api_transfer (SV prev_sv, SV next_sv)
848	{	1010	{
849	SV_CORO (prev, "Coro::transfer");	1011	dTHX;
850	SV_CORO (next, "Coro::transfer");	1012	struct transfer_args ta;
851		1013
852	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1014	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1015	TRANSFER (ta);
		1016	}
		1017
		1018	static int
		1019	api_save (SV *coro_sv, int new_save)
		1020	{
		1021	dTHX;
		1022	struct coro *coro = SvSTATE (coro_sv);
		1023	int old_save = coro->save;
		1024
		1025	if (new_save >= 0)
		1026	coro->save = new_save;
		1027
		1028	return old_save;
853	}	1029	}
854		1030
855	/ Coro ******************************************************************/	1031	/ Coro ******************************************************************/
856		1032
857	#define PRIO_MAX 3
858	#define PRIO_HIGH 1
859	#define PRIO_NORMAL 0
860	#define PRIO_LOW -1
861	#define PRIO_IDLE -3
862	#define PRIO_MIN -4
863
864	/* for Coro.pm */
865	static GV coro_current, coro_idle;
866	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
867	static int coro_nready;
868
869	static void	1033	static void
870	coro_enq (pTHX_ SV *sv)	1034	coro_enq (pTHX_ SV *coro_sv)
871	{	1035	{
872	SV **xprio;
873	int prio;
874
875	if (SvTYPE (sv) != SVt_PVHV)
876	croak ("Coro::ready tried to enqueue something that is not a coroutine");
877
878	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
879	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
880
881	prio = prio > PRIO_MAX ? PRIO_MAX
882	: prio < PRIO_MIN ? PRIO_MIN
883	: prio;
884
885	av_push (coro_ready [prio - PRIO_MIN], sv);	1036	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
886	coro_nready++;
887	}	1037	}
888		1038
889	static SV *	1039	static SV *
890	coro_deq (pTHX_ int min_prio)	1040	coro_deq (pTHX_ int min_prio)
891	{	1041	{
…		…
894	min_prio -= PRIO_MIN;	1044	min_prio -= PRIO_MIN;
895	if (min_prio < 0)	1045	if (min_prio < 0)
896	min_prio = 0;	1046	min_prio = 0;
897		1047
898	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1048	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
899	if (av_len (coro_ready[prio]) >= 0)	1049	if (AvFILLp (coro_ready [prio]) >= 0)
900	{
901	coro_nready--;
902	return av_shift (coro_ready[prio]);	1050	return av_shift (coro_ready [prio]);
903	}
904		1051
905	return 0;	1052	return 0;
906	}	1053	}
907		1054
908	static void	1055	static int
909	api_ready (SV *coro)	1056	api_ready (SV *coro_sv)
910	{	1057	{
911	dTHX;	1058	dTHX;
		1059	struct coro *coro;
912		1060
913	if (SvROK (coro))	1061	if (SvROK (coro_sv))
914	coro = SvRV (coro);	1062	coro_sv = SvRV (coro_sv);
		1063
		1064	coro = SvSTATE (coro_sv);
		1065
		1066	if (coro->flags & CF_READY)
		1067	return 0;
		1068
		1069	coro->flags \|= CF_READY;
915		1070
916	LOCK;	1071	LOCK;
917	coro_enq (aTHX_ SvREFCNT_inc (coro));	1072	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1073	++coro_nready;
918	UNLOCK;	1074	UNLOCK;
		1075
		1076	return 1;
		1077	}
		1078
		1079	static int
		1080	api_is_ready (SV *coro_sv)
		1081	{
		1082	dTHX;
		1083	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1084	}
		1085
		1086	static void
		1087	prepare_schedule (pTHX_ struct transfer_args *ta)
		1088	{
		1089	SV prev_sv, next_sv;
		1090
		1091	for (;;)
		1092	{
		1093	LOCK;
		1094	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1095
		1096	/* nothing to schedule: call the idle handler */
		1097	if (!next_sv)
		1098	{
		1099	dSP;
		1100	UNLOCK;
		1101
		1102	ENTER;
		1103	SAVETMPS;
		1104
		1105	PUSHMARK (SP);
		1106	PUTBACK;
		1107	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1108
		1109	FREETMPS;
		1110	LEAVE;
		1111	continue;
		1112	}
		1113
		1114	ta->next = SvSTATE (next_sv);
		1115
		1116	/* cannot transfer to destroyed coros, skip and look for next */
		1117	if (ta->next->flags & CF_DESTROYED)
		1118	{
		1119	UNLOCK;
		1120	SvREFCNT_dec (next_sv);
		1121	/* coro_nready is already taken care of by destroy */
		1122	continue;
		1123	}
		1124
		1125	--coro_nready;
		1126	UNLOCK;
		1127	break;
		1128	}
		1129
		1130	/* free this only after the transfer */
		1131	prev_sv = SvRV (coro_current);
		1132	SvRV_set (coro_current, next_sv);
		1133	ta->prev = SvSTATE (prev_sv);
		1134
		1135	assert (ta->next->flags & CF_READY);
		1136	ta->next->flags &= ~CF_READY;
		1137
		1138	LOCK;
		1139	free_coro_mortal (aTHX);
		1140	coro_mortal = prev_sv;
		1141	UNLOCK;
		1142	}
		1143
		1144	static void
		1145	prepare_cede (pTHX_ struct transfer_args *ta)
		1146	{
		1147	api_ready (coro_current);
		1148	prepare_schedule (aTHX_ ta);
		1149	}
		1150
		1151	static int
		1152	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1153	{
		1154	if (coro_nready)
		1155	{
		1156	SV *prev = SvRV (coro_current);
		1157	prepare_schedule (aTHX_ ta);
		1158	api_ready (prev);
		1159	return 1;
		1160	}
		1161	else
		1162	return 0;
919	}	1163	}
920		1164
921	static void	1165	static void
922	api_schedule (void)	1166	api_schedule (void)
923	{	1167	{
924	dTHX;	1168	dTHX;
		1169	struct transfer_args ta;
925		1170
926	SV prev, next;	1171	prepare_schedule (aTHX_ &ta);
927		1172	TRANSFER (ta);
928	LOCK;
929
930	prev = SvRV (GvSV (coro_current));
931	next = coro_deq (aTHX_ PRIO_MIN);
932
933	if (!next)
934	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
935
936	/* free this only after the transfer */
937	coro_mortal = prev;
938	SV_CORO (prev, "Coro::schedule");
939
940	SvRV (GvSV (coro_current)) = next;
941
942	SV_CORO (next, "Coro::schedule");
943
944	UNLOCK;
945
946	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
947	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);
948	}	1173	}
949		1174
950	static void	1175	static int
951	api_cede (void)	1176	api_cede (void)
952	{	1177	{
953	dTHX;	1178	dTHX;
		1179	struct transfer_args ta;
954		1180
955	LOCK;	1181	prepare_cede (aTHX_ &ta);
956	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
957	UNLOCK;
958		1182
959	api_schedule ();	1183	if (ta.prev != ta.next)
		1184	{
		1185	TRANSFER (ta);
		1186	return 1;
		1187	}
		1188	else
		1189	return 0;
		1190	}
		1191
		1192	static int
		1193	api_cede_notself (void)
		1194	{
		1195	dTHX;
		1196	struct transfer_args ta;
		1197
		1198	if (prepare_cede_notself (aTHX_ &ta))
		1199	{
		1200	TRANSFER (ta);
		1201	return 1;
		1202	}
		1203	else
		1204	return 0;
960	}	1205	}
961		1206
962	MODULE = Coro::State PACKAGE = Coro::State	1207	MODULE = Coro::State PACKAGE = Coro::State
963		1208
964	PROTOTYPES: ENABLE	1209	PROTOTYPES: DISABLE
965		1210
966	BOOT:	1211	BOOT:
967	{ /* {} necessary for stoopid perl-5.6.x */	1212	{
968	#ifdef USE_ITHREADS	1213	#ifdef USE_ITHREADS
969	MUTEX_INIT (&coro_mutex);	1214	MUTEX_INIT (&coro_mutex);
970	#endif	1215	#endif
		1216	BOOT_PAGESIZE;
971		1217
972	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
973	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
974	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1218	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
975		1219
976	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1220	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
977	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1221	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
978	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1222	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1223	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1224	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
979	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1225	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1226	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
980		1227
981	main_mainstack = PL_mainstack;	1228	main_mainstack = PL_mainstack;
		1229	main_top_env = PL_top_env;
		1230
		1231	while (main_top_env->je_prev)
		1232	main_top_env = main_top_env->je_prev;
982		1233
983	coroapi.ver = CORO_API_VERSION;	1234	coroapi.ver = CORO_API_VERSION;
984	coroapi.transfer = api_transfer;	1235	coroapi.transfer = api_transfer;
985	}
986		1236
987	Coro::State	1237	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
988	_newprocess(args)	1238	}
989	SV * args	1239
990	PROTOTYPE: $	1240	SV *
		1241	new (char *klass, ...)
991	CODE:	1242	CODE:
992	Coro__State coro;	1243	{
		1244	struct coro *coro;
		1245	HV *hv;
		1246	int i;
993		1247
994	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
995	croak ("Coro::State::_newprocess expects an arrayref");
996
997	Newz (0, coro, 1, struct coro);	1248	Newz (0, coro, 1, struct coro);
		1249	coro->args = newAV ();
		1250	coro->save = CORO_SAVE_DEF;
		1251	coro->flags = CF_NEW;
998		1252
999	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1253	if (coro_first) coro_first->prev = coro;
1000	/coro->mainstack = 0; //actual work is done inside transfer /	1254	coro->next = coro_first;
1001	/coro->stack = 0;/	1255	coro_first = coro;
1002		1256
1003	/* same as JMPENV_BOOTSTRAP */	1257	coro->hv = hv = newHV ();
1004	/* we might be able to recycle start_env, but safe is safe */	1258	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
1005	/Zero(&coro->start_env, 1, JMPENV);/	1259	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1006	coro->start_env.je_ret = -1;
1007	coro->start_env.je_mustcatch = TRUE;
1008		1260
1009	RETVAL = coro;	1261	for (i = 1; i < items; i++)
		1262	av_push (coro->args, newSVsv (ST (i)));
		1263	}
1010	OUTPUT:	1264	OUTPUT:
1011	RETVAL	1265	RETVAL
1012		1266
		1267	int
		1268	save (SV *coro, int new_save = -1)
		1269	CODE:
		1270	RETVAL = api_save (coro, new_save);
		1271	OUTPUT:
		1272	RETVAL
		1273
		1274	int
		1275	save_also (SV *coro_sv, int save_also)
		1276	CODE:
		1277	{
		1278	struct coro *coro = SvSTATE (coro_sv);
		1279	RETVAL = coro->save;
		1280	coro->save \|= save_also;
		1281	}
		1282	OUTPUT:
		1283	RETVAL
		1284
1013	void	1285	void
1014	transfer(prev, next, flags)	1286	_set_stacklevel (...)
1015	SV *prev	1287	ALIAS:
1016	SV *next	1288	Coro::State::transfer = 1
1017	int flags	1289	Coro::schedule = 2
1018	PROTOTYPE: @	1290	Coro::cede = 3
		1291	Coro::cede_notself = 4
1019	CODE:	1292	CODE:
1020	PUTBACK;	1293	{
1021	SV_CORO (next, "Coro::transfer");	1294	struct transfer_args ta;
1022	SV_CORO (prev, "Coro::transfer");	1295
1023	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1296	switch (ix)
1024	SPAGAIN;	1297	{
		1298	case 0:
		1299	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1300	ta.next = 0;
		1301	break;
		1302
		1303	case 1:
		1304	if (items != 2)
		1305	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1306
		1307	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1308	break;
		1309
		1310	case 2:
		1311	prepare_schedule (aTHX_ &ta);
		1312	break;
		1313
		1314	case 3:
		1315	prepare_cede (aTHX_ &ta);
		1316	break;
		1317
		1318	case 4:
		1319	if (!prepare_cede_notself (aTHX_ &ta))
		1320	XSRETURN_EMPTY;
		1321
		1322	break;
		1323	}
		1324
		1325	BARRIER;
		1326	TRANSFER (ta);
		1327
		1328	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1329	XSRETURN_YES;
		1330	}
		1331
		1332	bool
		1333	_destroy (SV *coro_sv)
		1334	CODE:
		1335	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1336	OUTPUT:
		1337	RETVAL
1025		1338
1026	void	1339	void
1027	DESTROY(coro)
1028	Coro::State coro
1029	CODE:
1030
1031	if (coro->mainstack && coro->mainstack != main_mainstack)
1032	{
1033	struct coro temp;
1034
1035	PUTBACK;
1036	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1037	LOAD (aTHX_ coro);
1038	SPAGAIN;
1039
1040	destroy_stacks (aTHX);
1041
1042	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1043	SPAGAIN;
1044
1045	coro->mainstack = 0;
1046	}
1047
1048	deallocate_stack (coro);
1049	SvREFCNT_dec (coro->args);
1050	Safefree (coro);
1051
1052	void
1053	_exit(code)	1340	_exit (code)
1054	int code	1341	int code
1055	PROTOTYPE: $	1342	PROTOTYPE: $
1056	CODE:	1343	CODE:
1057	_exit (code);	1344	_exit (code);
1058		1345
1059	MODULE = Coro::State PACKAGE = Coro::Cont	1346	int
		1347	cctx_stacksize (int new_stacksize = 0)
		1348	CODE:
		1349	RETVAL = coro_stacksize;
		1350	if (new_stacksize)
		1351	coro_stacksize = new_stacksize;
		1352	OUTPUT:
		1353	RETVAL
1060		1354
1061	# this is slightly dirty (should expose a c-level api)	1355	int
		1356	cctx_count ()
		1357	CODE:
		1358	RETVAL = cctx_count;
		1359	OUTPUT:
		1360	RETVAL
		1361
		1362	int
		1363	cctx_idle ()
		1364	CODE:
		1365	RETVAL = cctx_idle;
		1366	OUTPUT:
		1367	RETVAL
1062		1368
1063	void	1369	void
1064	yield(...)	1370	list ()
1065	PROTOTYPE: @	1371	PPCODE:
		1372	{
		1373	struct coro *coro;
		1374	for (coro = coro_first; coro; coro = coro->next)
		1375	if (coro->hv)
		1376	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1377	}
		1378
		1379	void
		1380	_eval (Coro::State coro, SV *coderef)
		1381	CODE:
		1382	{
		1383	if (coro->mainstack)
		1384	{
		1385	struct coro temp;
		1386	Zero (&temp, 1, struct coro);
		1387	temp.save = CORO_SAVE_ALL;
		1388
		1389	if (!(coro->flags & CF_RUNNING))
		1390	{
		1391	save_perl (aTHX_ &temp);
		1392	load_perl (aTHX_ coro);
		1393	}
		1394
		1395	{
		1396	dSP;
		1397	ENTER;
		1398	SAVETMPS;
		1399	PUSHMARK (SP);
		1400	PUTBACK;
		1401	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1402	SPAGAIN;
		1403	FREETMPS;
		1404	LEAVE;
		1405	PUTBACK;
		1406	}
		1407
		1408	if (!(coro->flags & CF_RUNNING))
		1409	{
		1410	save_perl (aTHX_ coro);
		1411	load_perl (aTHX_ &temp);
		1412	}
		1413	}
		1414	}
		1415
		1416	SV *
		1417	is_ready (Coro::State coro)
		1418	PROTOTYPE: $
		1419	ALIAS:
		1420	is_ready = CF_READY
		1421	is_running = CF_RUNNING
		1422	is_new = CF_NEW
		1423	is_destroyed = CF_DESTROYED
		1424	CODE:
		1425	RETVAL = boolSV (coro->flags & ix);
		1426	OUTPUT:
		1427	RETVAL
		1428
		1429	IV
		1430	rss (Coro::State coro)
		1431	PROTOTYPE: $
1066	CODE:	1432	CODE:
1067	SV *yieldstack;	1433	RETVAL = coro_rss (coro);
1068	SV *sv;	1434	OUTPUT:
1069	AV *defav = GvAV (PL_defgv);	1435	RETVAL
1070	struct coro prev, next;
1071		1436
1072	yieldstack = *hv_fetch (
1073	(HV *)SvRV (GvSV (coro_current)),
1074	"yieldstack", sizeof ("yieldstack") - 1,
1075	0
1076	);
1077
1078	/* set up @_ -- ugly */
1079	av_clear (defav);
1080	av_fill (defav, items - 1);
1081	while (items--)
1082	av_store (defav, items, SvREFCNT_inc (ST(items)));
1083
1084	sv = av_pop ((AV *)SvRV (yieldstack));
1085	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
1086	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
1087	SvREFCNT_dec (sv);
1088
1089	transfer (aTHX_ prev, next, 0);
1090		1437
1091	MODULE = Coro::State PACKAGE = Coro	1438	MODULE = Coro::State PACKAGE = Coro
1092		1439
1093	# this is slightly dirty (should expose a c-level api)
1094
1095	BOOT:	1440	BOOT:
1096	{	1441	{
1097	int i;	1442	int i;
		1443
1098	HV *stash = gv_stashpv ("Coro", TRUE);	1444	coro_stash = gv_stashpv ("Coro", TRUE);
1099		1445
1100	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1446	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1101	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1447	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1102	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1448	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1103	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1449	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1104	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1450	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1105	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1451	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1106		1452
1107	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1453	coro_current = get_sv ("Coro::current", FALSE);
1108	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1454	SvREADONLY_on (coro_current);
1109		1455
1110	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1456	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1111	coro_ready[i] = newAV ();	1457	coro_ready[i] = newAV ();
1112		1458
1113	{	1459	{
1114	SV *sv = perl_get_sv("Coro::API", 1);	1460	SV *sv = perl_get_sv("Coro::API", 1);
1115		1461
1116	coroapi.schedule = api_schedule;	1462	coroapi.schedule = api_schedule;
		1463	coroapi.save = api_save;
1117	coroapi.cede = api_cede;	1464	coroapi.cede = api_cede;
		1465	coroapi.cede_notself = api_cede_notself;
1118	coroapi.ready = api_ready;	1466	coroapi.ready = api_ready;
		1467	coroapi.is_ready = api_is_ready;
1119	coroapi.nready = &coro_nready;	1468	coroapi.nready = &coro_nready;
1120	coroapi.current = coro_current;	1469	coroapi.current = coro_current;
1121		1470
1122	GCoroAPI = &coroapi;	1471	GCoroAPI = &coroapi;
1123	sv_setiv(sv, (IV)&coroapi);	1472	sv_setiv (sv, (IV)&coroapi);
1124	SvREADONLY_on(sv);	1473	SvREADONLY_on (sv);
1125	}	1474	}
1126	}	1475	}
1127		1476
1128	#if !PERL_MICRO
1129
1130	void	1477	void
1131	ready(self)	1478	_set_current (SV *current)
1132	SV * self
1133	PROTOTYPE: $	1479	PROTOTYPE: $
1134	CODE:	1480	CODE:
1135	api_ready (self);	1481	SvREFCNT_dec (SvRV (coro_current));
1136		1482	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1137	#endif
1138		1483
1139	int	1484	int
		1485	prio (Coro::State coro, int newprio = 0)
		1486	ALIAS:
		1487	nice = 1
		1488	CODE:
		1489	{
		1490	RETVAL = coro->prio;
		1491
		1492	if (items > 1)
		1493	{
		1494	if (ix)
		1495	newprio = coro->prio - newprio;
		1496
		1497	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1498	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1499
		1500	coro->prio = newprio;
		1501	}
		1502	}
		1503	OUTPUT:
		1504	RETVAL
		1505
		1506	SV *
		1507	ready (SV *self)
		1508	PROTOTYPE: $
		1509	CODE:
		1510	RETVAL = boolSV (api_ready (self));
		1511	OUTPUT:
		1512	RETVAL
		1513
		1514	int
1140	nready(...)	1515	nready (...)
1141	PROTOTYPE:	1516	PROTOTYPE:
1142	CODE:	1517	CODE:
1143	RETVAL = coro_nready;	1518	RETVAL = coro_nready;
1144	OUTPUT:	1519	OUTPUT:
1145	RETVAL	1520	RETVAL
1146		1521
1147	void	1522	MODULE = Coro::State PACKAGE = Coro::AIO
1148	schedule(...)	1523
1149	PROTOTYPE:	1524	SV *
		1525	_get_state ()
1150	CODE:	1526	CODE:
1151	api_schedule ();
1152
1153	void
1154	cede(...)
1155	PROTOTYPE:
1156	CODE:
1157	api_cede ();
1158
1159	# and these are hacks
1160	SV *
1161	_aio_get_state ()
1162	CODE:
1163	{	1527	{
1164	struct {	1528	struct io_state *data;
1165	int errorno;
1166	int laststype;
1167	int laststatval;
1168	Stat_t statcache;
1169	} data;
1170		1529
		1530	RETVAL = newSV (sizeof (struct io_state));
		1531	data = (struct io_state *)SvPVX (RETVAL);
		1532	SvCUR_set (RETVAL, sizeof (struct io_state));
		1533	SvPOK_only (RETVAL);
		1534
1171	data.errorno = errno;	1535	data->errorno = errno;
1172	data.laststype = PL_laststype;	1536	data->laststype = PL_laststype;
1173	data.laststatval = PL_laststatval;	1537	data->laststatval = PL_laststatval;
1174	data.statcache = PL_statcache;	1538	data->statcache = PL_statcache;
1175
1176	RETVAL = newSVpvn ((char *)&data, sizeof data);
1177	}	1539	}
1178	OUTPUT:	1540	OUTPUT:
1179	RETVAL	1541	RETVAL
1180		1542
1181	void	1543	void
1182	_aio_set_state (char *data_)	1544	_set_state (char *data_)
1183	PROTOTYPE: $	1545	PROTOTYPE: $
1184	CODE:	1546	CODE:
1185	{	1547	{
1186	struct {	1548	struct io_state data = (void )data_;
1187	int errorno;
1188	int laststype;
1189	int laststatval;
1190	Stat_t statcache;
1191	} data = (void )data_;
1192		1549
1193	errno = data->errorno;	1550	errno = data->errorno;
1194	PL_laststype = data->laststype;	1551	PL_laststype = data->laststype;
1195	PL_laststatval = data->laststatval;	1552	PL_laststatval = data->laststatval;
1196	PL_statcache = data->statcache;	1553	PL_statcache = data->statcache;
1197	}	1554	}
		1555

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Comparing Coro/Coro/State.xs (file contents): Revision 1.74 by root, Mon Oct 23 22:49:09 2006 UTC vs. Revision 1.157 by root, Fri Sep 21 02:01:13 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.74 by root, Mon Oct 23 22:49:09 2006 UTC vs.
Revision 1.157 by root, Fri Sep 21 02:01:13 2007 UTC