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Comparing Coro/Coro/State.xs (file contents):
Revision 1.69 by root, Fri Dec 16 01:33:20 2005 UTC vs.
Revision 1.148 by root, Fri Apr 13 12:56:55 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 <signal.h>	75	/* 5.8.7 */
33		76	#ifndef SvRV_set
34	#ifdef HAVE_MMAP	77	# define SvRV_set(s,v) SvRV(s) = (v)
35	# include <unistd.h>
36	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS
38	# ifdef MAP_ANON
39	# define MAP_ANONYMOUS MAP_ANON
40	# else
41	# undef HAVE_MMAP
42	# endif
43	# endif	78	#endif
44	#endif
45		79
46	#define SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	#define UCORO_STATE "_coro_state"	81	# undef CORO_STACKGUARD
		82	#endif
		83
		84	#ifndef CORO_STACKGUARD
		85	# define CORO_STACKGUARD 0
		86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
48		92
49	/* The next macro should declare a variable stacklevel that contains and approximation	93	/* The next macro should declare a variable stacklevel that contains and approximation
50	* to the current C stack pointer. Its property is that it changes with each call	94	* to the current C stack pointer. Its property is that it changes with each call
51	* and should be unique. */	95	* and should be unique. */
		96	#define dSTACKLEVEL int stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	97	#define STACKLEVEL ((void *)&stacklevel)
53		98
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	99	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		100
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	101	#if __GNUC__ >= 3
		102	# define attribute(x) __attribute__(x)
		103	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		104	#else
		105	# define attribute(x)
		106	# define BARRIER
		107	#endif
		108
		109	#define NOINLINE attribute ((noinline))
57		110
58	#include "CoroAPI.h"	111	#include "CoroAPI.h"
59		112
60	#ifdef USE_ITHREADS	113	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	114	static perl_mutex coro_mutex;
…		…
64	#else	117	#else
65	# define LOCK (void)0	118	# define LOCK (void)0
66	# define UNLOCK (void)0	119	# define UNLOCK (void)0
67	#endif	120	#endif
68		121
		122	/* helper storage struct for Coro::AIO */
		123	struct io_state
		124	{
		125	int errorno;
		126	I32 laststype;
		127	int laststatval;
		128	Stat_t statcache;
		129	};
		130
		131	static size_t coro_stacksize = CORO_STACKSIZE;
69	static struct CoroAPI coroapi;	132	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	133	static AV *main_mainstack; /* used to differentiate between $main and others */
		134	static JMPENV *main_top_env;
71	static HV *coro_state_stash;	135	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 */	136	static SV *coro_mortal; /* will be freed after next transfer */
75		137
76	/* 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 */
77	typedef struct {	142	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	143	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		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;
82	coro_context cctx;	153	coro_context cctx;
83		154
84	void *sptr;	155	#if CORO_USE_VALGRIND
85	long ssize; /* positive == mmap, otherwise malloc */	156	int valgrind_id;
86	} coro_stack;	157	#endif
		158	char inuse, mapped;
		159	} coro_cctx;
87		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 */
88	struct coro {	169	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	170	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	171	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	PMOP *curpm;
134	COP *curcop;
135	JMPENV *top_env;
136		172
137	/* data associated with this coroutine (initial args) */	173	/* data associated with this coroutine (initial args) */
138	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;
139	};	193	};
140		194
141	typedef struct coro *Coro__State;	195	typedef struct coro *Coro__State;
142	typedef struct coro *Coro__State_or_hashref;	196	typedef struct coro *Coro__State_or_hashref;
143		197
144	/* mostly copied from op.c:cv_clone2 */	198	/** Coro ********************************************************************/
145	STATIC AV *	199
146	clone_padlist (pTHX_ AV *protopadlist)	200	#define PRIO_MAX 3
		201	#define PRIO_HIGH 1
		202	#define PRIO_NORMAL 0
		203	#define PRIO_LOW -1
		204	#define PRIO_IDLE -3
		205	#define PRIO_MIN -4
		206
		207	/* for Coro.pm */
		208	static SV *coro_current;
		209	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		210	static int coro_nready;
		211
		212	/** lowlevel stuff **********************************************************/
		213
		214	static AV *
		215	coro_clone_padlist (pTHX_ CV *cv)
147	{	216	{
148	AV *av;	217	AV *padlist = CvPADLIST (cv);
149	I32 ix;
150	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
151	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
152	SV **pname = AvARRAY (protopad_name);
153	SV **ppad = AvARRAY (protopad);
154	I32 fname = AvFILLp (protopad_name);
155	I32 fpad = AvFILLp (protopad);
156	AV *newpadlist, *newpad_name, *newpad;	218	AV *newpadlist, *newpad;
157	SV **npad;
158
159	newpad_name = newAV ();
160	for (ix = fname; ix >= 0; ix--)
161	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
162
163	newpad = newAV ();
164	av_fill (newpad, AvFILLp (protopad));
165	npad = AvARRAY (newpad);
166		219
167	newpadlist = newAV ();	220	newpadlist = newAV ();
168	AvREAL_off (newpadlist);	221	AvREAL_off (newpadlist);
169	av_store (newpadlist, 0, (SV *) newpad_name);	222	#if PERL_VERSION_ATLEAST (5,9,0)
		223	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		224	#else
		225	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		226	#endif
		227	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		228	--AvFILLp (padlist);
		229
		230	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
170	av_store (newpadlist, 1, (SV *) newpad);	231	av_store (newpadlist, 1, (SV *)newpad);
171
172	av = newAV (); /* will be @_ */
173	av_extend (av, 0);
174	av_store (newpad, 0, (SV *) av);
175	AvFLAGS (av) = AVf_REIFY;
176
177	for (ix = fpad; ix > 0; ix--)
178	{
179	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
180
181	if (namesv && namesv != &PL_sv_undef)
182	{
183	char *name = SvPVX (namesv); /* XXX */
184
185	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
186	{ /* lexical from outside? */
187	npad[ix] = SvREFCNT_inc (ppad[ix]);
188	}
189	else
190	{ /* our own lexical */
191	SV *sv;
192	if (*name == '&')
193	sv = SvREFCNT_inc (ppad[ix]);
194	else if (*name == '@')
195	sv = (SV *) newAV ();
196	else if (*name == '%')
197	sv = (SV *) newHV ();
198	else
199	sv = NEWSV (0, 0);
200
201	#ifdef SvPADBUSY
202	if (!SvPADBUSY (sv))
203	#endif
204	SvPADMY_on (sv);
205
206	npad[ix] = sv;
207	}
208	}
209	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
210	{
211	npad[ix] = SvREFCNT_inc (ppad[ix]);
212	}
213	else
214	{
215	SV *sv = NEWSV (0, 0);
216	SvPADTMP_on (sv);
217	npad[ix] = sv;
218	}
219	}
220
221	#if 0 /* return -ENOTUNDERSTOOD */
222	/* Now that vars are all in place, clone nested closures. */
223
224	for (ix = fpad; ix > 0; ix--) {
225	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
226	if (namesv
227	&& namesv != &PL_sv_undef
228	&& !(SvFLAGS(namesv) & SVf_FAKE)
229	&& *SvPVX(namesv) == '&'
230	&& CvCLONE(ppad[ix]))
231	{
232	CV *kid = cv_clone((CV*)ppad[ix]);
233	SvREFCNT_dec(ppad[ix]);
234	CvCLONE_on(kid);
235	SvPADMY_on(kid);
236	npad[ix] = (SV*)kid;
237	}
238	}
239	#endif
240		232
241	return newpadlist;	233	return newpadlist;
242	}	234	}
243		235
244	STATIC void	236	static void
245	free_padlist (pTHX_ AV *padlist)	237	free_padlist (pTHX_ AV *padlist)
246	{	238	{
247	/* may be during global destruction */	239	/* may be during global destruction */
248	if (SvREFCNT (padlist))	240	if (SvREFCNT (padlist))
249	{	241	{
…		…
263		255
264	SvREFCNT_dec ((SV*)padlist);	256	SvREFCNT_dec ((SV*)padlist);
265	}	257	}
266	}	258	}
267		259
268	STATIC int	260	static int
269	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	261	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
270	{	262	{
271	AV *padlist;	263	AV *padlist;
272	AV *av = (AV *)mg->mg_obj;	264	AV *av = (AV *)mg->mg_obj;
273		265
274	/* casting is fun. */	266	/* casting is fun. */
275	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	267	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
276	free_padlist (aTHX_ padlist);	268	free_padlist (aTHX_ padlist);
277		269
278	SvREFCNT_dec (av);	270	SvREFCNT_dec (av);
		271
		272	return 0;
279	}	273	}
280		274
281	#define PERL_MAGIC_coro PERL_MAGIC_ext	275	#define PERL_MAGIC_coro PERL_MAGIC_ext
282		276
283	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	277	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
284		278
		279	#define CORO_MAGIC(cv) \
		280	SvMAGIC (cv) \
		281	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		282	? SvMAGIC (cv) \
		283	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		284	: 0
		285
285	/* the next two functions merely cache the padlists */	286	/* the next two functions merely cache the padlists */
286	STATIC void	287	static void
287	get_padlist (pTHX_ CV *cv)	288	get_padlist (pTHX_ CV *cv)
288	{	289	{
289	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	290	MAGIC *mg = CORO_MAGIC (cv);
		291	AV *av;
290		292
291	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	293	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
292	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	294	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
293	else	295	else
		296	{
		297	#if CORO_PREFER_PERL_FUNCTIONS
		298	/* this is probably cleaner, but also slower? */
		299	CV *cp = Perl_cv_clone (cv);
		300	CvPADLIST (cv) = CvPADLIST (cp);
		301	CvPADLIST (cp) = 0;
		302	SvREFCNT_dec (cp);
		303	#else
294	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	304	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		305	#endif
		306	}
295	}	307	}
296		308
297	STATIC void	309	static void
298	put_padlist (pTHX_ CV *cv)	310	put_padlist (pTHX_ CV *cv)
299	{	311	{
300	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	312	MAGIC *mg = CORO_MAGIC (cv);
		313	AV *av;
301		314
302	if (!mg)	315	if (!mg)
303	{	316	{
304	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	317	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
305	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	318	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
306	mg->mg_virtual = &vtbl_coro;	319	mg->mg_virtual = &vtbl_coro;
307	mg->mg_obj = (SV *)newAV ();	320	mg->mg_obj = (SV *)newAV ();
308	}	321	}
309		322
310	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	323	av = (AV *)mg->mg_obj;
		324
		325	if (AvFILLp (av) >= AvMAX (av))
		326	av_extend (av, AvMAX (av) + 1);
		327
		328	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
311	}	329	}
		330
		331	/** load & save, init *******************************************************/
312		332
313	#define SB do {	333	#define SB do {
314	#define SE } while (0)	334	#define SE } while (0)
315		335
316	#define LOAD(state) load_state(aTHX_ (state));
317	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
318
319	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	336	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
320		337
321	static void	338	static void
322	load_state(pTHX_ Coro__State c)	339	load_perl (pTHX_ Coro__State c)
323	{	340	{
324	PL_dowarn = c->dowarn;	341	#define VAR(name,type) PL_ ## name = c->name;
325	PL_in_eval = c->in_eval;	342	# include "state.h"
326		343	#undef VAR
327	PL_curstackinfo = c->curstackinfo;
328	PL_curstack = c->curstack;
329	PL_mainstack = c->mainstack;
330	PL_stack_sp = c->stack_sp;
331	PL_op = c->op;
332	PL_curpad = c->curpad;
333	PL_comppad = c->comppad;
334	PL_compcv = c->compcv;
335	PL_stack_base = c->stack_base;
336	PL_stack_max = c->stack_max;
337	PL_tmps_stack = c->tmps_stack;
338	PL_tmps_floor = c->tmps_floor;
339	PL_tmps_ix = c->tmps_ix;
340	PL_tmps_max = c->tmps_max;
341	PL_markstack = c->markstack;
342	PL_markstack_ptr = c->markstack_ptr;
343	PL_markstack_max = c->markstack_max;
344	PL_scopestack = c->scopestack;
345	PL_scopestack_ix = c->scopestack_ix;
346	PL_scopestack_max = c->scopestack_max;
347	PL_savestack = c->savestack;
348	PL_savestack_ix = c->savestack_ix;
349	PL_savestack_max = c->savestack_max;
350	PL_retstack = c->retstack;
351	PL_retstack_ix = c->retstack_ix;
352	PL_retstack_max = c->retstack_max;
353	PL_curpm = c->curpm;
354	PL_curcop = c->curcop;
355	PL_top_env = c->top_env;
356		344
357	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	345	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
358	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	346	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
359	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	347	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		348	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		349
		350	if (c->irssv)
		351	{
		352	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		353	{
		354	SvREFCNT_dec (c->irssv);
		355	c->irssv = 0;
		356	}
		357	else
		358	{
		359	REPLACE_SV (PL_rs, c->irssv);
		360	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		361	sv_setsv (c->irssv_sv, PL_rs);
		362	}
		363	}
360		364
361	{	365	{
362	dSP;	366	dSP;
363	CV *cv;	367	CV *cv;
364		368
365	/* now do the ugly restore mess */	369	/* now do the ugly restore mess */
366	while ((cv = (CV *)POPs))	370	while ((cv = (CV *)POPs))
367	{	371	{
368	AV *padlist = (AV *)POPs;
369
370	if (padlist)
371	{
372	put_padlist (aTHX_ cv); /* mark this padlist as available */	372	put_padlist (aTHX_ cv); /* mark this padlist as available */
373	CvPADLIST(cv) = padlist;	373	CvDEPTH (cv) = PTR2IV (POPs);
374	}	374	CvPADLIST (cv) = (AV *)POPs;
375
376	++CvDEPTH(cv);
377	}	375	}
378		376
379	PUTBACK;	377	PUTBACK;
380	}	378	}
		379	assert (!PL_comppad || AvARRAY (PL_comppad));//D
381	}	380	}
382		381
383	static void	382	static void
384	save_state(pTHX_ Coro__State c, int flags)	383	save_perl (pTHX_ Coro__State c)
385	{	384	{
		385	assert (!PL_comppad || AvARRAY (PL_comppad));//D
386	{	386	{
387	dSP;	387	dSP;
388	I32 cxix = cxstack_ix;	388	I32 cxix = cxstack_ix;
389	PERL_CONTEXT *ccstk = cxstack;	389	PERL_CONTEXT *ccstk = cxstack;
390	PERL_SI *top_si = PL_curstackinfo;	390	PERL_SI *top_si = PL_curstackinfo;
…		…
392	/*	392	/*
393	* the worst thing you can imagine happens first - we have to save	393	* the worst thing you can imagine happens first - we have to save
394	* (and reinitialize) all cv's in the whole callchain :(	394	* (and reinitialize) all cv's in the whole callchain :(
395	*/	395	*/
396		396
		397	EXTEND (SP, 3 + 1);
397	PUSHs (Nullsv);	398	PUSHs (Nullsv);
398	/* this loop was inspired by pp_caller */	399	/* this loop was inspired by pp_caller */
399	for (;;)	400	for (;;)
400	{	401	{
401	while (cxix >= 0)	402	while (cxix >= 0)
402	{	403	{
403	PERL_CONTEXT *cx = &ccstk[cxix--];	404	PERL_CONTEXT *cx = &ccstk[cxix--];
404		405
405	if (CxTYPE(cx) == CXt_SUB)	406	if (CxTYPE (cx) == CXt_SUB)
406	{	407	{
407	CV *cv = cx->blk_sub.cv;	408	CV *cv = cx->blk_sub.cv;
		409
408	if (CvDEPTH(cv))	410	if (CvDEPTH (cv))
409	{	411	{
410	EXTEND (SP, CvDEPTH(cv)*2);	412	EXTEND (SP, 3);
411
412	while (--CvDEPTH(cv))
413	{
414	/* this tells the restore code to increment CvDEPTH */
415	PUSHs (Nullsv);
416	PUSHs ((SV *)cv);
417	}
418
419	PUSHs ((SV *)CvPADLIST(cv));	413	PUSHs ((SV *)CvPADLIST (cv));
		414	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
420	PUSHs ((SV *)cv);	415	PUSHs ((SV *)cv);
421		416
		417	CvDEPTH (cv) = 0;
422	get_padlist (aTHX_ cv); /* this is a monster */	418	get_padlist (aTHX_ cv);
423	}	419	}
424	}	420	}
425	#ifdef CXt_FORMAT
426	else if (CxTYPE(cx) == CXt_FORMAT)
427	{
428	/* I never used formats, so how should I know how these are implemented? */
429	/* my bold guess is as a simple, plain sub... */
430	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
431	}
432	#endif
433	}	421	}
434		422
435	if (top_si->si_type == PERLSI_MAIN)	423	if (top_si->si_type == PERLSI_MAIN)
436	break;	424	break;
437		425
…		…
441	}	429	}
442		430
443	PUTBACK;	431	PUTBACK;
444	}	432	}
445		433
446	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	434	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
447	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	435	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
448	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	436	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		437	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		438	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
449		439
450	c->dowarn = PL_dowarn;	440	#define VAR(name,type)c->name = PL_ ## name;
451	c->in_eval = PL_in_eval;	441	# include "state.h"
452		442	#undef VAR
453	c->curstackinfo = PL_curstackinfo;
454	c->curstack = PL_curstack;
455	c->mainstack = PL_mainstack;
456	c->stack_sp = PL_stack_sp;
457	c->op = PL_op;
458	c->curpad = PL_curpad;
459	c->comppad = PL_comppad;
460	c->compcv = PL_compcv;
461	c->stack_base = PL_stack_base;
462	c->stack_max = PL_stack_max;
463	c->tmps_stack = PL_tmps_stack;
464	c->tmps_floor = PL_tmps_floor;
465	c->tmps_ix = PL_tmps_ix;
466	c->tmps_max = PL_tmps_max;
467	c->markstack = PL_markstack;
468	c->markstack_ptr = PL_markstack_ptr;
469	c->markstack_max = PL_markstack_max;
470	c->scopestack = PL_scopestack;
471	c->scopestack_ix = PL_scopestack_ix;
472	c->scopestack_max = PL_scopestack_max;
473	c->savestack = PL_savestack;
474	c->savestack_ix = PL_savestack_ix;
475	c->savestack_max = PL_savestack_max;
476	c->retstack = PL_retstack;
477	c->retstack_ix = PL_retstack_ix;
478	c->retstack_max = PL_retstack_max;
479	c->curpm = PL_curpm;
480	c->curcop = PL_curcop;
481	c->top_env = PL_top_env;
482	}	443	}
483		444
484	/*	445	/*
485	* allocate various perl stacks. This is an exact copy	446	* allocate various perl stacks. This is an exact copy
486	* of perl.c:init_stacks, except that it uses less memory	447	* of perl.c:init_stacks, except that it uses less memory
487	* on the (sometimes correct) assumption that coroutines do	448	* on the (sometimes correct) assumption that coroutines do
488	* not usually need a lot of stackspace.	449	* not usually need a lot of stackspace.
489	*/	450	*/
490	STATIC void	451	#if CORO_PREFER_PERL_FUNCTIONS
		452	# define coro_init_stacks init_stacks
		453	#else
		454	static void
491	coro_init_stacks (pTHX)	455	coro_init_stacks (pTHX)
492	{	456	{
493	LOCK;
494
495	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	457	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
496	PL_curstackinfo->si_type = PERLSI_MAIN;	458	PL_curstackinfo->si_type = PERLSI_MAIN;
497	PL_curstack = PL_curstackinfo->si_stack;	459	PL_curstack = PL_curstackinfo->si_stack;
498	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	460	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
499		461
500	PL_stack_base = AvARRAY(PL_curstack);	462	PL_stack_base = AvARRAY(PL_curstack);
501	PL_stack_sp = PL_stack_base;	463	PL_stack_sp = PL_stack_base;
502	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	464	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
503		465
504	New(50,PL_tmps_stack,96,SV*);	466	New(50,PL_tmps_stack,128,SV*);
505	PL_tmps_floor = -1;	467	PL_tmps_floor = -1;
506	PL_tmps_ix = -1;	468	PL_tmps_ix = -1;
507	PL_tmps_max = 96;	469	PL_tmps_max = 128;
508		470
509	New(54,PL_markstack,16,I32);	471	New(54,PL_markstack,32,I32);
510	PL_markstack_ptr = PL_markstack;	472	PL_markstack_ptr = PL_markstack;
511	PL_markstack_max = PL_markstack + 16;	473	PL_markstack_max = PL_markstack + 32;
512		474
513	#ifdef SET_MARK_OFFSET	475	#ifdef SET_MARK_OFFSET
514	SET_MARK_OFFSET;	476	SET_MARK_OFFSET;
515	#endif	477	#endif
516		478
517	New(54,PL_scopestack,16,I32);	479	New(54,PL_scopestack,32,I32);
518	PL_scopestack_ix = 0;	480	PL_scopestack_ix = 0;
519	PL_scopestack_max = 16;	481	PL_scopestack_max = 32;
520		482
521	New(54,PL_savestack,96,ANY);	483	New(54,PL_savestack,64,ANY);
522	PL_savestack_ix = 0;	484	PL_savestack_ix = 0;
523	PL_savestack_max = 96;	485	PL_savestack_max = 64;
524		486
		487	#if !PERL_VERSION_ATLEAST (5,9,0)
525	New(54,PL_retstack,8,OP*);	488	New(54,PL_retstack,16,OP*);
526	PL_retstack_ix = 0;	489	PL_retstack_ix = 0;
527	PL_retstack_max = 8;	490	PL_retstack_max = 16;
528		491	#endif
529	UNLOCK;
530	}	492	}
		493	#endif
531		494
532	/*	495	/*
533	* destroy the stacks, the callchain etc...	496	* destroy the stacks, the callchain etc...
534	*/	497	*/
535	STATIC void	498	static void
536	destroy_stacks(pTHX)	499	coro_destroy_stacks (pTHX)
537	{	500	{
538	if (!IN_DESTRUCT)	501	if (!IN_DESTRUCT)
539	{	502	{
540	/* is this ugly, I ask? */	503	/* restore all saved variables and stuff */
541	LEAVE_SCOPE (0);	504	LEAVE_SCOPE (0);
		505	assert (PL_tmps_floor == -1);
542		506
543	/* sure it is, but more important: is it correct?? :/ */	507	/* free all temporaries */
544	FREETMPS;	508	FREETMPS;
		509	assert (PL_tmps_ix == -1);
545		510
		511	/* unwind all extra stacks */
546	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	512	POPSTACK_TO (PL_mainstack);
		513
		514	/* unwind main stack */
		515	dounwind (-1);
547	}	516	}
548		517
549	while (PL_curstackinfo->si_next)	518	while (PL_curstackinfo->si_next)
550	PL_curstackinfo = PL_curstackinfo->si_next;	519	PL_curstackinfo = PL_curstackinfo->si_next;
551		520
552	while (PL_curstackinfo)	521	while (PL_curstackinfo)
553	{	522	{
554	PERL_SI *p = PL_curstackinfo->si_prev;	523	PERL_SI *p = PL_curstackinfo->si_prev;
555		524
556	{ /*D*//*remove*/
557	dSP;
558	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
559	PUTBACK; /* possibly superfluous */
560	}
561
562	if (!IN_DESTRUCT)	525	if (!IN_DESTRUCT)
563	{
564	dounwind (-1);/*D*//*remove*/
565	SvREFCNT_dec (PL_curstackinfo->si_stack);	526	SvREFCNT_dec (PL_curstackinfo->si_stack);
566	}
567		527
568	Safefree (PL_curstackinfo->si_cxstack);	528	Safefree (PL_curstackinfo->si_cxstack);
569	Safefree (PL_curstackinfo);	529	Safefree (PL_curstackinfo);
570	PL_curstackinfo = p;	530	PL_curstackinfo = p;
571	}	531	}
572		532
573	Safefree (PL_tmps_stack);	533	Safefree (PL_tmps_stack);
574	Safefree (PL_markstack);	534	Safefree (PL_markstack);
575	Safefree (PL_scopestack);	535	Safefree (PL_scopestack);
576	Safefree (PL_savestack);	536	Safefree (PL_savestack);
		537	#if !PERL_VERSION_ATLEAST (5,9,0)
577	Safefree (PL_retstack);	538	Safefree (PL_retstack);
578	}
579
580	static void
581	allocate_stack (Coro__State ctx, int alloc)
582	{
583	coro_stack *stack;
584
585	New (0, stack, 1, coro_stack);
586
587	stack->refcnt = 1;
588	stack->usecnt = 1;
589	stack->gencnt = ctx->gencnt = 0;
590
591	if (alloc)
592	{
593	#if HAVE_MMAP
594	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
595	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
596	if (stack->sptr == (void *)-1)
597	#endif	539	#endif
598	{
599	/*FIXME*//*D*//* reasonable stack size! */
600	stack->ssize = - (STACKSIZE * sizeof (long));
601	New (0, stack->sptr, STACKSIZE, long);
602	}
603	}
604	else
605	stack->sptr = 0;
606
607	ctx->stack = stack;
608	}	540	}
609		541
610	static void	542	/** coroutine stack handling ************************************************/
611	deallocate_stack (Coro__State ctx)
612	{
613	coro_stack *stack = ctx->stack;
614		543
615	ctx->stack = 0;
616
617	if (stack)
618	{
619	if (!--stack->refcnt)
620	{
621	#ifdef HAVE_MMAP
622	if (stack->ssize > 0 && stack->sptr)
623	munmap (stack->sptr, stack->ssize);
624	else
625	#endif
626	Safefree (stack->sptr);
627
628	Safefree (stack);
629	}
630	else if (ctx->gencnt == stack->gencnt)
631	--stack->usecnt;
632	}
633	}
634
635	static void	544	static void
636	setup_coro (void *arg)	545	setup_coro (pTHX_ struct coro *coro)
637	{	546	{
638	/*	547	/*
639	* emulate part of the perl startup here.	548	* emulate part of the perl startup here.
640	*/	549	*/
		550	coro_init_stacks (aTHX);
		551
		552	PL_curcop = &PL_compiling;
		553	PL_in_eval = EVAL_NULL;
		554	PL_comppad = 0;
		555	PL_curpm = 0;
		556	PL_localizing = 0;
		557	PL_dirty = 0;
		558	PL_restartop = 0;
		559
		560	{
		561	dSP;
		562	LOGOP myop;
		563
		564	SvREFCNT_dec (GvAV (PL_defgv));
		565	GvAV (PL_defgv) = coro->args; coro->args = 0;
		566
		567	Zero (&myop, 1, LOGOP);
		568	myop.op_next = Nullop;
		569	myop.op_flags = OPf_WANT_VOID;
		570
		571	PUSHMARK (SP);
		572	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		573	PUTBACK;
		574	PL_op = (OP *)&myop;
		575	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		576	SPAGAIN;
		577	}
		578
		579	ENTER; /* necessary e.g. for dounwind */
		580	}
		581
		582	static void
		583	free_coro_mortal (pTHX)
		584	{
		585	if (coro_mortal)
		586	{
		587	SvREFCNT_dec (coro_mortal);
		588	coro_mortal = 0;
		589	}
		590	}
		591
		592	/* inject a fake call to Coro::State::_cctx_init into the execution */
		593	/* _cctx_init shoukld be careful, as it could be called at almost any time */
		594	/* during execution of a pelr program */
		595	static void NOINLINE
		596	prepare_cctx (pTHX_ coro_cctx *cctx)
		597	{
		598	dSP;
		599	LOGOP myop;
		600
		601	Zero (&myop, 1, LOGOP);
		602	myop.op_next = PL_op;
		603	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		604
		605	PUSHMARK (SP);
		606	EXTEND (SP, 2);
		607	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		608	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		609	PUTBACK;
		610	PL_op = (OP *)&myop;
		611	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		612	SPAGAIN;
		613	}
		614
		615	/*
		616	* this is a _very_ stripped down perl interpreter ;)
		617	*/
		618	static void
		619	coro_run (void *arg)
		620	{
641	dTHX;	621	dTHX;
642	dSP;
643	Coro__State ctx = (Coro__State)arg;
644	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
645		622
646	coro_init_stacks (aTHX);	623	/* coro_run is the alternative tail of transfer(), so unlock here. */
647	/*PL_curcop = 0;*/	624	UNLOCK;
648	/*PL_in_eval = PL_in_eval;*/ /* inherit */
649	SvREFCNT_dec (GvAV (PL_defgv));
650	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
651		625
652	SPAGAIN;	626	PL_top_env = &PL_start_env;
653		627
654	if (ctx->stack)	628	/* inject a fake subroutine call to cctx_init */
655	{	629	prepare_cctx (aTHX_ (coro_cctx *)arg);
656	ctx->cursp = 0;
657		630
658	PUSHMARK(SP);	631	/* somebody or something will hit me for both perl_run and PL_restartop */
659	PUTBACK;	632	PL_restartop = PL_op;
660	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	633	perl_run (PL_curinterp);
661		634
662	if (SvTRUE (ERRSV))	635	/* If perl-run returns we assume exit() was being called, which */
663	croak (NULL);	636	/* seems to be the only valid (non-bug) reason for perl_run to return. */
664	else	637	/* We try to exit by jumping to the bootstrap-time "top" top_env, as */
665	croak ("FATAL: CCTXT coroutine returned!");	638	/* we cannot restore the "main" coroutine as Coro has no such concept */
		639	PL_top_env = main_top_env;
		640	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		641	}
		642
		643	static coro_cctx *
		644	cctx_new ()
		645	{
		646	coro_cctx *cctx;
		647	void *stack_start;
		648	size_t stack_size;
		649
		650	++cctx_count;
		651
		652	Newz (0, cctx, 1, coro_cctx);
		653
		654	#if HAVE_MMAP
		655
		656	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		657	/* mmap supposedly does allocate-on-write for us */
		658	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		659
		660	if (cctx->sptr != (void *)-1)
		661	{
		662	# if CORO_STACKGUARD
		663	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		664	# endif
		665	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		666	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		667	cctx->mapped = 1;
666	}	668	}
667	else	669	else
668	{	670	#endif
669	UNOP myop;
670
671	PL_op = (OP *)&myop;
672
673	Zero(&myop, 1, UNOP);
674	myop.op_next = Nullop;
675	myop.op_flags = OPf_WANT_VOID;
676
677	PUSHMARK(SP);
678	XPUSHs (sub_init);
679	/*
680	* the next line is slightly wrong, as PL_op->op_next
681	* is actually being executed so we skip the first op.
682	* that doesn't matter, though, since it is only
683	* pp_nextstate and we never return...
684	* ah yes, and I don't care anyways ;)
685	*/
686	PUTBACK;
687	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
688	SPAGAIN;
689
690	ENTER; /* necessary e.g. for dounwind */
691	}	671	{
692	}	672	cctx->ssize = coro_stacksize * (long)sizeof (long);
		673	New (0, cctx->sptr, coro_stacksize, long);
693		674
694	static void	675	if (!cctx->sptr)
695	continue_coro (void *arg)	676	{
696	{	677	perror ("FATAL: unable to allocate stack for coroutine");
697	/*	678	_exit (EXIT_FAILURE);
698	* this is a _very_ stripped down perl interpreter ;)	679	}
699	*/
700	dTHX;
701	Coro__State ctx = (Coro__State)arg;
702	JMPENV coro_start_env;
703		680
704	PL_top_env = &ctx->start_env;	681	stack_start = cctx->sptr;
		682	stack_size = cctx->ssize;
		683	}
705		684
706	ctx->cursp = 0;	685	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		686	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		687
		688	return cctx;
		689	}
		690
		691	static void
		692	cctx_destroy (coro_cctx *cctx)
		693	{
		694	if (!cctx)
		695	return;
		696
		697	--cctx_count;
		698
		699	#if CORO_USE_VALGRIND
		700	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		701	#endif
		702
		703	#if HAVE_MMAP
		704	if (cctx->mapped)
		705	munmap (cctx->sptr, cctx->ssize);
		706	else
		707	#endif
		708	Safefree (cctx->sptr);
		709
		710	Safefree (cctx);
		711	}
		712
		713	static coro_cctx *
		714	cctx_get (pTHX)
		715	{
		716	while (cctx_first)
		717	{
		718	coro_cctx *cctx = cctx_first;
		719	cctx_first = cctx->next;
		720	--cctx_idle;
		721
		722	if (cctx->ssize >= coro_stacksize)
		723	return cctx;
		724
		725	cctx_destroy (cctx);
		726	}
		727
707	PL_op = PL_op->op_next;	728	PL_op = PL_op->op_next;
708	CALLRUNOPS(aTHX);	729	return cctx_new ();
709
710	abort ();
711	}	730	}
712		731
713	STATIC void	732	static void
		733	cctx_put (coro_cctx *cctx)
		734	{
		735	/* free another cctx if overlimit */
		736	if (cctx_idle >= MAX_IDLE_CCTX)
		737	{
		738	coro_cctx *first = cctx_first;
		739	cctx_first = first->next;
		740	--cctx_idle;
		741
		742	assert (!first->inuse);
		743	cctx_destroy (first);
		744	}
		745
		746	++cctx_idle;
		747	cctx->next = cctx_first;
		748	cctx_first = cctx;
		749	}
		750
		751	/** coroutine switching *****************************************************/
		752
		753	/* never call directly, always through the coro_state_transfer global variable */
		754	static void NOINLINE
714	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	755	transfer (pTHX_ struct coro *prev, struct coro *next)
715	{	756	{
716	dSTACKLEVEL;	757	dSTACKLEVEL;
717		758
		759	/* sometimes transfer is only called to set idle_sp */
		760	if (!next)
		761	{
		762	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		763	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		764	}
718	if (prev != next)	765	else if (prev != next)
719	{	766	{
720	if (next->mainstack)	767	coro_cctx *prev__cctx;
		768
		769	if (prev->flags & CF_NEW)
721	{	770	{
722	LOCK;	771	/* create a new empty context */
723	SAVE (prev, flags);	772	Newz (0, prev->cctx, 1, coro_cctx);
724	LOAD (next);	773	prev->cctx->inuse = 1;
725	UNLOCK;	774	prev->flags &= ~CF_NEW;
726		775	prev->flags |= CF_RUNNING;
727	/* mark this state as in-use */
728	next->mainstack = 0;
729	next->tmps_ix = -2;
730
731	/* stacklevel changed? if yes, grab the stack for us! */
732	if (flags & TRANSFER_SAVE_CCTXT)
733	{
734	if (!prev->stack)
735	allocate_stack (prev, 0);
736	else if (prev->cursp != stacklevel
737	&& prev->stack->usecnt > 1)
738	{
739	prev->gencnt = ++prev->stack->gencnt;
740	prev->stack->usecnt = 1;
741	}
742
743	/* has our stack been invalidated? */
744	if (next->stack && next->stack->gencnt != next->gencnt)
745	{
746	deallocate_stack (next);
747	allocate_stack (next, 1);
748	coro_create (&(next->stack->cctx),
749	continue_coro, (void *)next,
750	next->stack->sptr, labs (next->stack->ssize));
751	}
752
753	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
754	prev->cursp = stacklevel;
755	/* don't add any code here */
756	}
757	else
758	next->cursp = stacklevel;
759	}	776	}
760	else if (next->tmps_ix == -2)	777
761	croak ("tried to transfer to running coroutine");	778	/*TODO: must not croak here */
		779	if (!prev->flags & CF_RUNNING)
		780	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		781
		782	if (next->flags & CF_RUNNING)
		783	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		784
		785	if (next->flags & CF_DESTROYED)
		786	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		787
		788	prev->flags &= ~CF_RUNNING;
		789	next->flags |= CF_RUNNING;
		790
		791	LOCK;
		792
		793	if (next->flags & CF_NEW)
		794	{
		795	/* need to start coroutine */
		796	next->flags &= ~CF_NEW;
		797	/* first get rid of the old state */
		798	save_perl (aTHX_ prev);
		799	/* setup coroutine call */
		800	setup_coro (aTHX_ next);
		801	/* need a new stack */
		802	assert (!next->cctx);
		803	}
762	else	804	else
763	{	805	{
764	LOCK;	806	/* coroutine already started */
765	SAVE (prev, -1); /* first get rid of the old state */	807	save_perl (aTHX_ prev);
766	UNLOCK;	808	load_perl (aTHX_ next);
767
768	if (flags & TRANSFER_SAVE_CCTXT)
769	{
770	if (!prev->stack)
771	allocate_stack (prev, 0);
772
773	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
774	{
775	PL_top_env = &next->start_env;
776
777	setup_coro (next);
778	next->cursp = stacklevel;
779
780	prev->stack->refcnt++;
781	prev->stack->usecnt++;
782	next->stack = prev->stack;
783	next->gencnt = prev->gencnt;
784	}
785	else
786	{
787	assert (!next->stack);
788	allocate_stack (next, 1);
789	coro_create (&(next->stack->cctx),
790	setup_coro, (void *)next,
791	next->stack->sptr, labs (next->stack->ssize));
792	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
793	prev->cursp = stacklevel;
794	/* don't add any code here */
795	}
796	}
797	else
798	{
799	setup_coro (next);
800	next->cursp = stacklevel;
801	}
802	}	809	}
803	}
804		810
805	LOCK;	811	prev__cctx = prev->cctx;
806	if (coro_mortal)	812
807	{	813	/* possibly "free" the cctx */
808	SvREFCNT_dec (coro_mortal);	814	if (prev__cctx->idle_sp == STACKLEVEL)
809	coro_mortal = 0;	815	{
810	}	816	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		817	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		818
		819	prev->cctx = 0;
		820
		821	cctx_put (prev__cctx);
		822	prev__cctx->inuse = 0;
		823	}
		824
		825	if (!next->cctx)
		826	{
		827	next->cctx = cctx_get (aTHX);
		828	assert (!next->cctx->inuse);
		829	next->cctx->inuse = 1;
		830	}
		831
		832	if (prev__cctx != next->cctx)
		833	{
		834	prev__cctx->top_env = PL_top_env;
		835	PL_top_env = next->cctx->top_env;
		836	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		837	}
		838
		839	free_coro_mortal (aTHX);
811	UNLOCK;	840	UNLOCK;
		841	}
812	}	842	}
813		843
814	#define SV_CORO(sv,func) \	844	struct transfer_args
815	do { \	845	{
816	if (SvROK (sv)) \	846	struct coro *prev, *next;
817	sv = SvRV (sv); \	847	};
818	\
819	if (SvTYPE (sv) == SVt_PVHV) \
820	{ \
821	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
822	\
823	if (!he) \
824	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
825	\
826	(sv) = SvRV (HeVAL(he)); \
827	} \
828	\
829	/* must also be changed inside Coro::Cont::yield */ \
830	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
831	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
832	\
833	} while(0)
834		848
835	#define SvSTATE(sv) (struct coro *)SvIV (sv)	849	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
836		850
		851	/** high level stuff ********************************************************/
		852
837	static void	853	static int
		854	coro_state_destroy (pTHX_ struct coro *coro)
		855	{
		856	if (coro->flags & CF_DESTROYED)
		857	return 0;
		858
		859	coro->flags |= CF_DESTROYED;
		860
		861	if (coro->flags & CF_READY)
		862	{
		863	/* reduce nready, as destroying a ready coro effectively unreadies it */
		864	/* alternative: look through all ready queues and remove the coro */
		865	LOCK;
		866	--coro_nready;
		867	UNLOCK;
		868	}
		869	else
		870	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		871
		872	if (coro->mainstack && coro->mainstack != main_mainstack)
		873	{
		874	struct coro temp;
		875
		876	assert (!(coro->flags & CF_RUNNING));
		877
		878	Zero (&temp, 1, struct coro);
		879	temp.save = CORO_SAVE_DEF;
		880
		881	if (coro->flags & CF_RUNNING)
		882	croak ("FATAL: tried to destroy currently running coroutine");
		883
		884	save_perl (aTHX_ &temp);
		885	load_perl (aTHX_ coro);
		886
		887	coro_destroy_stacks (aTHX);
		888
		889	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		890
		891	coro->mainstack = 0;
		892	}
		893
		894	cctx_destroy (coro->cctx);
		895	SvREFCNT_dec (coro->args);
		896
		897	return 1;
		898	}
		899
		900	static int
		901	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		902	{
		903	struct coro *coro = (struct coro *)mg->mg_ptr;
		904	mg->mg_ptr = 0;
		905
		906	if (--coro->refcnt < 0)
		907	{
		908	coro_state_destroy (aTHX_ coro);
		909	Safefree (coro);
		910	}
		911
		912	return 0;
		913	}
		914
		915	static int
		916	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		917	{
		918	struct coro *coro = (struct coro *)mg->mg_ptr;
		919
		920	++coro->refcnt;
		921
		922	return 0;
		923	}
		924
		925	static MGVTBL coro_state_vtbl = {
		926	0, 0, 0, 0,
		927	coro_state_free,
		928	0,
		929	#ifdef MGf_DUP
		930	coro_state_dup,
		931	#else
		932	# define MGf_DUP 0
		933	#endif
		934	};
		935
		936	static struct coro *
		937	SvSTATE_ (pTHX_ SV *coro)
		938	{
		939	HV *stash;
		940	MAGIC *mg;
		941
		942	if (SvROK (coro))
		943	coro = SvRV (coro);
		944
		945	stash = SvSTASH (coro);
		946	if (stash != coro_stash && stash != coro_state_stash)
		947	{
		948	/* very slow, but rare, check */
		949	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		950	croak ("Coro::State object required");
		951	}
		952
		953	mg = CORO_MAGIC (coro);
		954	return (struct coro *)mg->mg_ptr;
		955	}
		956
		957	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		958
		959	static void
		960	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		961	{
		962	ta->prev = SvSTATE (prev_sv);
		963	ta->next = SvSTATE (next_sv);
		964	}
		965
		966	static void
838	api_transfer(pTHX_ SV *prev, SV *next, int flags)	967	api_transfer (SV *prev_sv, SV *next_sv)
839	{	968	{
840	SV_CORO (prev, "Coro::transfer");	969	dTHX;
841	SV_CORO (next, "Coro::transfer");	970	struct transfer_args ta;
842		971
843	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	972	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		973	TRANSFER (ta);
		974	}
		975
		976	static int
		977	api_save (SV *coro_sv, int new_save)
		978	{
		979	dTHX;
		980	struct coro *coro = SvSTATE (coro_sv);
		981	int old_save = coro->save;
		982
		983	if (new_save >= 0)
		984	coro->save = new_save;
		985
		986	return old_save;
844	}	987	}
845		988
846	/** Coro ********************************************************************/	989	/** Coro ********************************************************************/
847		990
848	#define PRIO_MAX 3
849	#define PRIO_HIGH 1
850	#define PRIO_NORMAL 0
851	#define PRIO_LOW -1
852	#define PRIO_IDLE -3
853	#define PRIO_MIN -4
854
855	/* for Coro.pm */
856	static GV *coro_current, *coro_idle;
857	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
858	static int coro_nready;
859
860	static void	991	static void
861	coro_enq (pTHX_ SV *sv)	992	coro_enq (pTHX_ SV *coro_sv)
862	{	993	{
863	if (SvTYPE (sv) == SVt_PVHV)
864	{
865	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
866	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
867
868	prio = prio > PRIO_MAX ? PRIO_MAX
869	: prio < PRIO_MIN ? PRIO_MIN
870	: prio;
871
872	av_push (coro_ready [prio - PRIO_MIN], sv);	994	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
873	coro_nready++;
874
875	return;
876	}
877
878	croak ("Coro::ready tried to enqueue something that is not a coroutine");
879	}	995	}
880		996
881	static SV *	997	static SV *
882	coro_deq (pTHX_ int min_prio)	998	coro_deq (pTHX_ int min_prio)
883	{	999	{
…		…
886	min_prio -= PRIO_MIN;	1002	min_prio -= PRIO_MIN;
887	if (min_prio < 0)	1003	if (min_prio < 0)
888	min_prio = 0;	1004	min_prio = 0;
889		1005
890	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1006	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
891	if (av_len (coro_ready[prio]) >= 0)	1007	if (AvFILLp (coro_ready [prio]) >= 0)
892	{
893	coro_nready--;
894	return av_shift (coro_ready[prio]);	1008	return av_shift (coro_ready [prio]);
895	}
896		1009
897	return 0;	1010	return 0;
898	}	1011	}
899		1012
900	static void	1013	static int
901	api_ready (SV *coro)	1014	api_ready (SV *coro_sv)
902	{	1015	{
903	dTHX;	1016	dTHX;
		1017	struct coro *coro;
904		1018
905	if (SvROK (coro))	1019	if (SvROK (coro_sv))
906	coro = SvRV (coro);	1020	coro_sv = SvRV (coro_sv);
		1021
		1022	coro = SvSTATE (coro_sv);
		1023
		1024	if (coro->flags & CF_READY)
		1025	return 0;
		1026
		1027	coro->flags |= CF_READY;
907		1028
908	LOCK;	1029	LOCK;
909	coro_enq (aTHX_ SvREFCNT_inc (coro));	1030	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1031	++coro_nready;
910	UNLOCK;	1032	UNLOCK;
		1033
		1034	return 1;
		1035	}
		1036
		1037	static int
		1038	api_is_ready (SV *coro_sv)
		1039	{
		1040	dTHX;
		1041	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1042	}
		1043
		1044	static void
		1045	prepare_schedule (pTHX_ struct transfer_args *ta)
		1046	{
		1047	SV *prev_sv, *next_sv;
		1048
		1049	for (;;)
		1050	{
		1051	LOCK;
		1052	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1053
		1054	/* nothing to schedule: call the idle handler */
		1055	if (!next_sv)
		1056	{
		1057	dSP;
		1058	UNLOCK;
		1059
		1060	ENTER;
		1061	SAVETMPS;
		1062
		1063	PUSHMARK (SP);
		1064	PUTBACK;
		1065	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1066
		1067	FREETMPS;
		1068	LEAVE;
		1069	continue;
		1070	}
		1071
		1072	ta->next = SvSTATE (next_sv);
		1073
		1074	/* cannot transfer to destroyed coros, skip and look for next */
		1075	if (ta->next->flags & CF_DESTROYED)
		1076	{
		1077	UNLOCK;
		1078	SvREFCNT_dec (next_sv);
		1079	/* coro_nready is already taken care of by destroy */
		1080	continue;
		1081	}
		1082
		1083	--coro_nready;
		1084	UNLOCK;
		1085	break;
		1086	}
		1087
		1088	/* free this only after the transfer */
		1089	prev_sv = SvRV (coro_current);
		1090	SvRV_set (coro_current, next_sv);
		1091	ta->prev = SvSTATE (prev_sv);
		1092
		1093	assert (ta->next->flags & CF_READY);
		1094	ta->next->flags &= ~CF_READY;
		1095
		1096	LOCK;
		1097	free_coro_mortal (aTHX);
		1098	coro_mortal = prev_sv;
		1099	UNLOCK;
		1100	}
		1101
		1102	static void
		1103	prepare_cede (pTHX_ struct transfer_args *ta)
		1104	{
		1105	api_ready (coro_current);
		1106	prepare_schedule (aTHX_ ta);
		1107	}
		1108
		1109	static int
		1110	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1111	{
		1112	if (coro_nready)
		1113	{
		1114	SV *prev = SvRV (coro_current);
		1115	prepare_schedule (aTHX_ ta);
		1116	api_ready (prev);
		1117	return 1;
		1118	}
		1119	else
		1120	return 0;
911	}	1121	}
912		1122
913	static void	1123	static void
914	api_schedule (void)	1124	api_schedule (void)
915	{	1125	{
916	dTHX;	1126	dTHX;
		1127	struct transfer_args ta;
917		1128
918	SV *prev, *next;	1129	prepare_schedule (aTHX_ &ta);
919		1130	TRANSFER (ta);
920	LOCK;
921
922	prev = SvRV (GvSV (coro_current));
923	next = coro_deq (aTHX_ PRIO_MIN);
924
925	if (!next)
926	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
927
928	/* free this only after the transfer */
929	coro_mortal = prev;
930	SV_CORO (prev, "Coro::schedule");
931
932	SvRV (GvSV (coro_current)) = next;
933
934	SV_CORO (next, "Coro::schedule");
935
936	UNLOCK;
937
938	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
939	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
940	}	1131	}
941		1132
942	static void	1133	static int
943	api_cede (void)	1134	api_cede (void)
944	{	1135	{
945	dTHX;	1136	dTHX;
		1137	struct transfer_args ta;
946		1138
947	LOCK;	1139	prepare_cede (aTHX_ &ta);
948	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
949	UNLOCK;
950		1140
951	api_schedule ();	1141	if (ta.prev != ta.next)
		1142	{
		1143	TRANSFER (ta);
		1144	return 1;
		1145	}
		1146	else
		1147	return 0;
		1148	}
		1149
		1150	static int
		1151	api_cede_notself (void)
		1152	{
		1153	dTHX;
		1154	struct transfer_args ta;
		1155
		1156	if (prepare_cede_notself (aTHX_ &ta))
		1157	{
		1158	TRANSFER (ta);
		1159	return 1;
		1160	}
		1161	else
		1162	return 0;
952	}	1163	}
953		1164
954	MODULE = Coro::State PACKAGE = Coro::State	1165	MODULE = Coro::State PACKAGE = Coro::State
955		1166
956	PROTOTYPES: ENABLE	1167	PROTOTYPES: DISABLE
957		1168
958	BOOT:	1169	BOOT:
959	{ /* {} necessary for stoopid perl-5.6.x */	1170	{
960	#ifdef USE_ITHREADS	1171	#ifdef USE_ITHREADS
961	MUTEX_INIT (&coro_mutex);	1172	MUTEX_INIT (&coro_mutex);
962	#endif	1173	#endif
		1174	BOOT_PAGESIZE;
963		1175
964	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
965	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
966	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1176	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
967		1177
968	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1178	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
969	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1179	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
970	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1180	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1181	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1182	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
971	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1183	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1184	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
972		1185
973	main_mainstack = PL_mainstack;	1186	main_mainstack = PL_mainstack;
		1187	main_top_env = PL_top_env;
		1188
		1189	while (main_top_env->je_prev)
		1190	main_top_env = main_top_env->je_prev;
974		1191
975	coroapi.ver = CORO_API_VERSION;	1192	coroapi.ver = CORO_API_VERSION;
976	coroapi.transfer = api_transfer;	1193	coroapi.transfer = api_transfer;
977	}
978		1194
979	Coro::State	1195	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
980	_newprocess(args)	1196	}
981	SV * args	1197
982	PROTOTYPE: $	1198	SV *
		1199	new (char *klass, ...)
983	CODE:	1200	CODE:
984	Coro__State coro;	1201	{
		1202	struct coro *coro;
		1203	HV *hv;
		1204	int i;
985		1205
986	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
987	croak ("Coro::State::_newprocess expects an arrayref");
988
989	Newz (0, coro, 1, struct coro);	1206	Newz (0, coro, 1, struct coro);
		1207	coro->args = newAV ();
		1208	coro->save = CORO_SAVE_DEF;
		1209	coro->flags = CF_NEW;
990		1210
991	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1211	hv = newHV ();
992	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1212	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
993	/*coro->stack = 0;*/	1213	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
994		1214
995	/* same as JMPENV_BOOTSTRAP */	1215	for (i = 1; i < items; i++)
996	/* we might be able to recycle start_env, but safe is safe */	1216	av_push (coro->args, newSVsv (ST (i)));
997	/*Zero(&coro->start_env, 1, JMPENV);*/	1217	}
998	coro->start_env.je_ret = -1;
999	coro->start_env.je_mustcatch = TRUE;
1000
1001	RETVAL = coro;
1002	OUTPUT:	1218	OUTPUT:
1003	RETVAL	1219	RETVAL
1004		1220
		1221	int
		1222	save (SV *coro, int new_save = -1)
		1223	CODE:
		1224	RETVAL = api_save (coro, new_save);
		1225	OUTPUT:
		1226	RETVAL
		1227
		1228	int
		1229	save_also (SV *coro_sv, int save_also)
		1230	CODE:
		1231	{
		1232	struct coro *coro = SvSTATE (coro_sv);
		1233	RETVAL = coro->save;
		1234	coro->save |= save_also;
		1235	}
		1236	OUTPUT:
		1237	RETVAL
		1238
1005	void	1239	void
1006	transfer(prev, next, flags)	1240	_set_stacklevel (...)
1007	SV *prev	1241	ALIAS:
1008	SV *next	1242	Coro::State::transfer = 1
1009	int flags	1243	Coro::schedule = 2
1010	PROTOTYPE: @	1244	Coro::cede = 3
		1245	Coro::cede_notself = 4
1011	CODE:	1246	CODE:
1012	PUTBACK;	1247	{
1013	SV_CORO (next, "Coro::transfer");	1248	struct transfer_args ta;
1014	SV_CORO (prev, "Coro::transfer");	1249
1015	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1250	switch (ix)
1016	SPAGAIN;	1251	{
		1252	case 0:
		1253	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1254	ta.next = 0;
		1255	break;
		1256
		1257	case 1:
		1258	if (items != 2)
		1259	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1260
		1261	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1262	break;
		1263
		1264	case 2:
		1265	prepare_schedule (aTHX_ &ta);
		1266	break;
		1267
		1268	case 3:
		1269	prepare_cede (aTHX_ &ta);
		1270	break;
		1271
		1272	case 4:
		1273	if (!prepare_cede_notself (aTHX_ &ta))
		1274	XSRETURN_EMPTY;
		1275
		1276	break;
		1277	}
		1278
		1279	BARRIER;
		1280	TRANSFER (ta);
		1281
		1282	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1283	XSRETURN_YES;
		1284	}
		1285
		1286	bool
		1287	_destroy (SV *coro_sv)
		1288	CODE:
		1289	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1290	OUTPUT:
		1291	RETVAL
1017		1292
1018	void	1293	void
1019	DESTROY(coro)
1020	Coro::State coro
1021	CODE:
1022
1023	if (coro->mainstack && coro->mainstack != main_mainstack)
1024	{
1025	struct coro temp;
1026
1027	PUTBACK;
1028	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1029	LOAD (aTHX_ coro);
1030	SPAGAIN;
1031
1032	destroy_stacks (aTHX);
1033
1034	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1035	SPAGAIN;
1036
1037	coro->mainstack = 0;
1038	}
1039
1040	deallocate_stack (coro);
1041	SvREFCNT_dec (coro->args);
1042	Safefree (coro);
1043
1044	void
1045	_exit(code)	1294	_exit (code)
1046	int code	1295	int code
1047	PROTOTYPE: $	1296	PROTOTYPE: $
1048	CODE:	1297	CODE:
1049	_exit (code);	1298	_exit (code);
1050		1299
1051	MODULE = Coro::State PACKAGE = Coro::Cont	1300	int
		1301	cctx_stacksize (int new_stacksize = 0)
		1302	CODE:
		1303	RETVAL = coro_stacksize;
		1304	if (new_stacksize)
		1305	coro_stacksize = new_stacksize;
		1306	OUTPUT:
		1307	RETVAL
1052		1308
1053	# this is slightly dirty (should expose a c-level api)	1309	int
		1310	cctx_count ()
		1311	CODE:
		1312	RETVAL = cctx_count;
		1313	OUTPUT:
		1314	RETVAL
1054		1315
1055	void	1316	int
1056	yield(...)	1317	cctx_idle ()
1057	PROTOTYPE: @	1318	CODE:
1058	CODE:	1319	RETVAL = cctx_idle;
1059	SV *yieldstack;	1320	OUTPUT:
1060	SV *sv;	1321	RETVAL
1061	AV *defav = GvAV (PL_defgv);
1062	struct coro *prev, *next;
1063
1064	yieldstack = *hv_fetch (
1065	(HV *)SvRV (GvSV (coro_current)),
1066	"yieldstack", sizeof ("yieldstack") - 1,
1067	0
1068	);
1069
1070	/* set up @_ -- ugly */
1071	av_clear (defav);
1072	av_fill (defav, items - 1);
1073	while (items--)
1074	av_store (defav, items, SvREFCNT_inc (ST(items)));
1075
1076	sv = av_pop ((AV *)SvRV (yieldstack));
1077	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1078	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1079	SvREFCNT_dec (sv);
1080
1081	transfer (aTHX_ prev, next, 0);
1082		1322
1083	MODULE = Coro::State PACKAGE = Coro	1323	MODULE = Coro::State PACKAGE = Coro
1084		1324
1085	# this is slightly dirty (should expose a c-level api)
1086
1087	BOOT:	1325	BOOT:
1088	{	1326	{
1089	int i;	1327	int i;
		1328
1090	HV *stash = gv_stashpv ("Coro", TRUE);	1329	coro_stash = gv_stashpv ("Coro", TRUE);
1091		1330
1092	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1331	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1093	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1332	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1094	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1333	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1095	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1334	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1096	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1335	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1097	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1336	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1098		1337
1099	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1338	coro_current = get_sv ("Coro::current", FALSE);
1100	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1339	SvREADONLY_on (coro_current);
1101		1340
1102	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1341	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1103	coro_ready[i] = newAV ();	1342	coro_ready[i] = newAV ();
1104		1343
1105	{	1344	{
1106	SV *sv = perl_get_sv("Coro::API", 1);	1345	SV *sv = perl_get_sv("Coro::API", 1);
1107		1346
1108	coroapi.schedule = api_schedule;	1347	coroapi.schedule = api_schedule;
		1348	coroapi.save = api_save;
1109	coroapi.cede = api_cede;	1349	coroapi.cede = api_cede;
		1350	coroapi.cede_notself = api_cede_notself;
1110	coroapi.ready = api_ready;	1351	coroapi.ready = api_ready;
		1352	coroapi.is_ready = api_is_ready;
1111	coroapi.nready = &coro_nready;	1353	coroapi.nready = &coro_nready;
1112	coroapi.current = coro_current;	1354	coroapi.current = coro_current;
1113		1355
1114	GCoroAPI = &coroapi;	1356	GCoroAPI = &coroapi;
1115	sv_setiv(sv, (IV)&coroapi);	1357	sv_setiv (sv, (IV)&coroapi);
1116	SvREADONLY_on(sv);	1358	SvREADONLY_on (sv);
1117	}	1359	}
1118	}	1360	}
1119		1361
1120	#if !PERL_MICRO
1121
1122	void	1362	void
1123	ready(self)	1363	_set_current (SV *current)
1124	SV * self
1125	PROTOTYPE: $	1364	PROTOTYPE: $
1126	CODE:	1365	CODE:
1127	api_ready (self);	1366	SvREFCNT_dec (SvRV (coro_current));
1128		1367	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1129	#endif
1130		1368
1131	int	1369	int
		1370	prio (Coro::State coro, int newprio = 0)
		1371	ALIAS:
		1372	nice = 1
		1373	CODE:
		1374	{
		1375	RETVAL = coro->prio;
		1376
		1377	if (items > 1)
		1378	{
		1379	if (ix)
		1380	newprio = coro->prio - newprio;
		1381
		1382	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1383	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1384
		1385	coro->prio = newprio;
		1386	}
		1387	}
		1388	OUTPUT:
		1389	RETVAL
		1390
		1391	SV *
		1392	ready (SV *self)
		1393	PROTOTYPE: $
		1394	CODE:
		1395	RETVAL = boolSV (api_ready (self));
		1396	OUTPUT:
		1397	RETVAL
		1398
		1399	SV *
		1400	is_ready (SV *self)
		1401	PROTOTYPE: $
		1402	CODE:
		1403	RETVAL = boolSV (api_is_ready (self));
		1404	OUTPUT:
		1405	RETVAL
		1406
		1407	int
1132	nready(...)	1408	nready (...)
1133	PROTOTYPE:	1409	PROTOTYPE:
1134	CODE:	1410	CODE:
1135	RETVAL = coro_nready;	1411	RETVAL = coro_nready;
1136	OUTPUT:	1412	OUTPUT:
1137	RETVAL	1413	RETVAL
1138		1414
		1415	MODULE = Coro::State PACKAGE = Coro::AIO
		1416
		1417	SV *
		1418	_get_state ()
		1419	CODE:
		1420	{
		1421	struct io_state *data;
		1422
		1423	RETVAL = newSV (sizeof (struct io_state));
		1424	data = (struct io_state *)SvPVX (RETVAL);
		1425	SvCUR_set (RETVAL, sizeof (struct io_state));
		1426	SvPOK_only (RETVAL);
		1427
		1428	data->errorno = errno;
		1429	data->laststype = PL_laststype;
		1430	data->laststatval = PL_laststatval;
		1431	data->statcache = PL_statcache;
		1432	}
		1433	OUTPUT:
		1434	RETVAL
		1435
1139	void	1436	void
1140	schedule(...)	1437	_set_state (char *data_)
1141	PROTOTYPE:	1438	PROTOTYPE: $
1142	CODE:	1439	CODE:
1143	api_schedule ();	1440	{
		1441	struct io_state *data = (void *)data_;
1144		1442
1145	void	1443	errno = data->errorno;
1146	cede(...)	1444	PL_laststype = data->laststype;
1147	PROTOTYPE:	1445	PL_laststatval = data->laststatval;
1148	CODE:	1446	PL_statcache = data->statcache;
1149	api_cede ();	1447	}
1150		1448

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