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Comparing Coro/Coro/State.xs (file contents):
Revision 1.76 by root, Thu Oct 26 08:45:56 2006 UTC vs.
Revision 1.158 by root, Fri Sep 21 02:23:48 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "patchlevel.h"	9	#include "patchlevel.h"
10		10
11	#if 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		76	#ifndef SvRV_set
34	#ifdef HAVE_MMAP	77	# define SvRV_set(s,v) SvRV(s) = (v)
35	# include <unistd.h>
36	# include <sys/mman.h>
37	# ifndef MAP_ANONYMOUS
38	# ifdef MAP_ANON
39	# define MAP_ANONYMOUS MAP_ANON
40	# else
41	# undef HAVE_MMAP
42	# endif
43	# endif	78	#endif
44	#endif
45		79
46	#define SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
47	#define UCORO_STATE "_coro_state"	81	# undef CORO_STACKGUARD
		82	#endif
48		83
49	/* The next macro should declare a variable stacklevel that contains and approximation	84	#ifndef CORO_STACKGUARD
50	* to the current C stack pointer. Its property is that it changes with each call	85	# define CORO_STACKGUARD 0
51	* and should be unique. */	86	#endif
		87
		88	/* prefer perl internal functions over our own? */
		89	#ifndef CORO_PREFER_PERL_FUNCTIONS
		90	# define CORO_PREFER_PERL_FUNCTIONS 0
		91	#endif
		92
		93	/* The next macros try to return the current stack pointer, in an as
		94	* portable way as possible. */
		95	#define dSTACKLEVEL volatile char stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
53		97
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		99
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	100	#if __GNUC__ >= 3
		101	# define attribute(x) __attribute__(x)
		102	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		103	#else
		104	# define attribute(x)
		105	# define BARRIER
		106	#endif
		107
		108	#define NOINLINE attribute ((noinline))
57		109
58	#include "CoroAPI.h"	110	#include "CoroAPI.h"
59		111
60	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
…		…
64	#else	116	#else
65	# define LOCK (void)0	117	# define LOCK (void)0
66	# define UNLOCK (void)0	118	# define UNLOCK (void)0
67	#endif	119	#endif
68		120
		121	/* helper storage struct for Coro::AIO */
		122	struct io_state
		123	{
		124	int errorno;
		125	I32 laststype;
		126	int laststatval;
		127	Stat_t statcache;
		128	};
		129
		130	static size_t coro_stacksize = CORO_STACKSIZE;
69	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	132	static AV *main_mainstack; /* used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
71	static HV *coro_state_stash;	134	static HV *coro_state_stash, *coro_stash;
72	static SV *ucoro_state_sv;
73	static U32 ucoro_state_hash;
74	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
75		136
76	/* this is actually not only the c stack but also c registers etc... */	137	static struct coro_cctx *cctx_first;
		138	static int cctx_count, cctx_idle;
		139
		140	/* this is a structure representing a c-level coroutine */
77	typedef struct {	141	typedef struct coro_cctx {
78	int refcnt; /* pointer reference counter */	142	struct coro_cctx *next;
79	int usecnt; /* shared by how many coroutines */
80	int gencnt; /* generation counter */
81		143
		144	/* the stack */
		145	void *sptr;
		146	size_t ssize;
		147
		148	/* cpu state */
		149	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		150	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		151	JMPENV *top_env;
82	coro_context cctx;	152	coro_context cctx;
83		153
84	void *sptr;	154	#if CORO_USE_VALGRIND
85	long ssize; /* positive == mmap, otherwise malloc */	155	int valgrind_id;
86	} coro_stack;	156	#endif
		157	char inuse, mapped;
		158	} coro_cctx;
87		159
		160	enum {
		161	CF_RUNNING = 0x0001, /* coroutine is running */
		162	CF_READY = 0x0002, /* coroutine is ready */
		163	CF_NEW = 0x0004, /* has never been switched to */
		164	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		165	};
		166
		167	/* this is a structure representing a perl-level coroutine */
88	struct coro {	168	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	169	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	170	coro_cctx *cctx;
91
92	/* the optional C context */
93	coro_stack *stack;
94	void *cursp;
95	int gencnt;
96
97	/* optionally saved, might be zero */
98	AV *defav;
99	SV *defsv;
100	SV *errsv;
101
102	/* saved global state not related to stacks */
103	U8 dowarn;
104	I32 in_eval;
105
106	/* the stacks and related info (callchain etc..) */
107	PERL_SI *curstackinfo;
108	AV *curstack;
109	AV *mainstack;
110	SV **stack_sp;
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	CV *compcv;
115	SV **stack_base;
116	SV **stack_max;
117	SV **tmps_stack;
118	I32 tmps_floor;
119	I32 tmps_ix;
120	I32 tmps_max;
121	I32 *markstack;
122	I32 *markstack_ptr;
123	I32 *markstack_max;
124	I32 *scopestack;
125	I32 scopestack_ix;
126	I32 scopestack_max;
127	ANY *savestack;
128	I32 savestack_ix;
129	I32 savestack_max;
130	OP **retstack;
131	I32 retstack_ix;
132	I32 retstack_max;
133	PMOP *curpm;
134	COP *curcop;
135	JMPENV *top_env;
136		171
137	/* data associated with this coroutine (initial args) */	172	/* data associated with this coroutine (initial args) */
138	AV *args;	173	AV *args;
		174	int refcnt;
		175	int save; /* CORO_SAVE flags */
		176	int flags; /* CF_ flags */
		177
		178	/* optionally saved, might be zero */
		179	AV *defav; /* @_ */
		180	SV *defsv; /* $_ */
		181	SV *errsv; /* $@ */
		182	GV *deffh; /* default filehandle */
		183	SV *irssv; /* $/ */
		184	SV *irssv_sv; /* real $/ cache */
		185
		186	#define VAR(name,type) type name;
		187	# include "state.h"
		188	#undef VAR
		189
		190	/* coro process data */
		191	int prio;
		192
		193	/* linked list */
		194	struct coro *next, *prev;
		195	HV *hv; /* the perl hash associated with this coro, if any */
139	};	196	};
140		197
141	typedef struct coro *Coro__State;	198	typedef struct coro *Coro__State;
142	typedef struct coro *Coro__State_or_hashref;	199	typedef struct coro *Coro__State_or_hashref;
143		200
144	/* mostly copied from op.c:cv_clone2 */	201	/** Coro ********************************************************************/
145	STATIC AV *	202
146	clone_padlist (pTHX_ AV *protopadlist)	203	#define PRIO_MAX 3
		204	#define PRIO_HIGH 1
		205	#define PRIO_NORMAL 0
		206	#define PRIO_LOW -1
		207	#define PRIO_IDLE -3
		208	#define PRIO_MIN -4
		209
		210	/* for Coro.pm */
		211	static SV *coro_current;
		212	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		213	static int coro_nready;
		214	static struct coro *coro_first;
		215
		216	/** lowlevel stuff **********************************************************/
		217
		218	static AV *
		219	coro_clone_padlist (pTHX_ CV *cv)
147	{	220	{
148	AV *av;	221	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;	222	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		223
167	newpadlist = newAV ();	224	newpadlist = newAV ();
168	AvREAL_off (newpadlist);	225	AvREAL_off (newpadlist);
169	av_store (newpadlist, 0, (SV *) newpad_name);	226	#if PERL_VERSION_ATLEAST (5,9,0)
		227	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		228	#else
		229	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		230	#endif
		231	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		232	--AvFILLp (padlist);
		233
		234	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
170	av_store (newpadlist, 1, (SV *) newpad);	235	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	AvREIFY_on (av);
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		236
241	return newpadlist;	237	return newpadlist;
242	}	238	}
243		239
244	STATIC void	240	static void
245	free_padlist (pTHX_ AV *padlist)	241	free_padlist (pTHX_ AV *padlist)
246	{	242	{
247	/* may be during global destruction */	243	/* may be during global destruction */
248	if (SvREFCNT (padlist))	244	if (SvREFCNT (padlist))
249	{	245	{
…		…
263		259
264	SvREFCNT_dec ((SV*)padlist);	260	SvREFCNT_dec ((SV*)padlist);
265	}	261	}
266	}	262	}
267		263
268	STATIC int	264	static int
269	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	265	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
270	{	266	{
271	AV *padlist;	267	AV *padlist;
272	AV *av = (AV *)mg->mg_obj;	268	AV *av = (AV *)mg->mg_obj;
273		269
…		…
282		278
283	#define PERL_MAGIC_coro PERL_MAGIC_ext	279	#define PERL_MAGIC_coro PERL_MAGIC_ext
284		280
285	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	281	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
286		282
		283	#define CORO_MAGIC(cv) \
		284	SvMAGIC (cv) \
		285	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		286	? SvMAGIC (cv) \
		287	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		288	: 0
		289
287	/* the next two functions merely cache the padlists */	290	/* the next two functions merely cache the padlists */
288	STATIC void	291	static void
289	get_padlist (pTHX_ CV *cv)	292	get_padlist (pTHX_ CV *cv)
290	{	293	{
291	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	294	MAGIC *mg = CORO_MAGIC (cv);
		295	AV *av;
292		296
293	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	297	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
294	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	298	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
295	else	299	else
		300	{
		301	#if CORO_PREFER_PERL_FUNCTIONS
		302	/* this is probably cleaner, but also slower? */
		303	CV *cp = Perl_cv_clone (cv);
		304	CvPADLIST (cv) = CvPADLIST (cp);
		305	CvPADLIST (cp) = 0;
		306	SvREFCNT_dec (cp);
		307	#else
296	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	308	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		309	#endif
		310	}
297	}	311	}
298		312
299	STATIC void	313	static void
300	put_padlist (pTHX_ CV *cv)	314	put_padlist (pTHX_ CV *cv)
301	{	315	{
302	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	316	MAGIC *mg = CORO_MAGIC (cv);
		317	AV *av;
303		318
304	if (!mg)	319	if (!mg)
305	{	320	{
306	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	321	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
307	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	322	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
308	mg->mg_virtual = &vtbl_coro;	323	mg->mg_virtual = &vtbl_coro;
309	mg->mg_obj = (SV *)newAV ();	324	mg->mg_obj = (SV *)newAV ();
310	}	325	}
311		326
312	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	327	av = (AV *)mg->mg_obj;
		328
		329	if (AvFILLp (av) >= AvMAX (av))
		330	av_extend (av, AvMAX (av) + 1);
		331
		332	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
313	}	333	}
		334
		335	/** load & save, init *******************************************************/
314		336
315	#define SB do {	337	#define SB do {
316	#define SE } while (0)	338	#define SE } while (0)
317		339
318	#define LOAD(state) load_state(aTHX_ (state));
319	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
320
321	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	340	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
322		341
323	static void	342	static void
324	load_state(pTHX_ Coro__State c)	343	load_perl (pTHX_ Coro__State c)
325	{	344	{
326	PL_dowarn = c->dowarn;	345	#define VAR(name,type) PL_ ## name = c->name;
327	PL_in_eval = c->in_eval;	346	# include "state.h"
328		347	#undef VAR
329	PL_curstackinfo = c->curstackinfo;
330	PL_curstack = c->curstack;
331	PL_mainstack = c->mainstack;
332	PL_stack_sp = c->stack_sp;
333	PL_op = c->op;
334	PL_curpad = c->curpad;
335	PL_comppad = c->comppad;
336	PL_compcv = c->compcv;
337	PL_stack_base = c->stack_base;
338	PL_stack_max = c->stack_max;
339	PL_tmps_stack = c->tmps_stack;
340	PL_tmps_floor = c->tmps_floor;
341	PL_tmps_ix = c->tmps_ix;
342	PL_tmps_max = c->tmps_max;
343	PL_markstack = c->markstack;
344	PL_markstack_ptr = c->markstack_ptr;
345	PL_markstack_max = c->markstack_max;
346	PL_scopestack = c->scopestack;
347	PL_scopestack_ix = c->scopestack_ix;
348	PL_scopestack_max = c->scopestack_max;
349	PL_savestack = c->savestack;
350	PL_savestack_ix = c->savestack_ix;
351	PL_savestack_max = c->savestack_max;
352	#if PERL_VERSION < 9
353	PL_retstack = c->retstack;
354	PL_retstack_ix = c->retstack_ix;
355	PL_retstack_max = c->retstack_max;
356	#endif
357	PL_curpm = c->curpm;
358	PL_curcop = c->curcop;
359	PL_top_env = c->top_env;
360		348
361	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	349	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
362	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	350	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
363	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	351	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		352	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		353
		354	if (c->irssv)
		355	{
		356	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		357	{
		358	SvREFCNT_dec (c->irssv);
		359	c->irssv = 0;
		360	}
		361	else
		362	{
		363	REPLACE_SV (PL_rs, c->irssv);
		364	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		365	sv_setsv (c->irssv_sv, PL_rs);
		366	}
		367	}
364		368
365	{	369	{
366	dSP;	370	dSP;
367	CV *cv;	371	CV *cv;
368		372
369	/* now do the ugly restore mess */	373	/* now do the ugly restore mess */
370	while ((cv = (CV *)POPs))	374	while ((cv = (CV *)POPs))
371	{	375	{
372	AV *padlist = (AV *)POPs;
373
374	if (padlist)
375	{
376	put_padlist (aTHX_ cv); /* mark this padlist as available */	376	put_padlist (aTHX_ cv); /* mark this padlist as available */
377	CvPADLIST(cv) = padlist;	377	CvDEPTH (cv) = PTR2IV (POPs);
378	}	378	CvPADLIST (cv) = (AV *)POPs;
379
380	++CvDEPTH(cv);
381	}	379	}
382		380
383	PUTBACK;	381	PUTBACK;
384	}	382	}
385	}	383	}
386		384
387	static void	385	static void
388	save_state(pTHX_ Coro__State c, int flags)	386	save_perl (pTHX_ Coro__State c)
389	{	387	{
390	{	388	{
391	dSP;	389	dSP;
392	I32 cxix = cxstack_ix;	390	I32 cxix = cxstack_ix;
393	PERL_CONTEXT *ccstk = cxstack;	391	PERL_CONTEXT *ccstk = cxstack;
…		…
396	/*	394	/*
397	* the worst thing you can imagine happens first - we have to save	395	* the worst thing you can imagine happens first - we have to save
398	* (and reinitialize) all cv's in the whole callchain :(	396	* (and reinitialize) all cv's in the whole callchain :(
399	*/	397	*/
400		398
401	PUSHs (Nullsv);	399	XPUSHs (Nullsv);
402	/* this loop was inspired by pp_caller */	400	/* this loop was inspired by pp_caller */
403	for (;;)	401	for (;;)
404	{	402	{
405	while (cxix >= 0)	403	while (cxix >= 0)
406	{	404	{
407	PERL_CONTEXT *cx = &ccstk[cxix--];	405	PERL_CONTEXT *cx = &ccstk[cxix--];
408		406
409	if (CxTYPE(cx) == CXt_SUB)	407	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
410	{	408	{
411	CV *cv = cx->blk_sub.cv;	409	CV *cv = cx->blk_sub.cv;
		410
412	if (CvDEPTH(cv))	411	if (CvDEPTH (cv))
413	{	412	{
414	EXTEND (SP, CvDEPTH(cv)*2);	413	EXTEND (SP, 3);
415
416	while (--CvDEPTH(cv))
417	{
418	/* this tells the restore code to increment CvDEPTH */
419	PUSHs (Nullsv);
420	PUSHs ((SV *)cv);
421	}
422
423	PUSHs ((SV *)CvPADLIST(cv));	414	PUSHs ((SV *)CvPADLIST (cv));
		415	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
424	PUSHs ((SV *)cv);	416	PUSHs ((SV *)cv);
425		417
		418	CvDEPTH (cv) = 0;
426	get_padlist (aTHX_ cv); /* this is a monster */	419	get_padlist (aTHX_ cv);
427	}	420	}
428	}	421	}
429	#ifdef CXt_FORMAT
430	else if (CxTYPE(cx) == CXt_FORMAT)
431	{
432	/* I never used formats, so how should I know how these are implemented? */
433	/* my bold guess is as a simple, plain sub... */
434	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
435	}
436	#endif
437	}	422	}
438		423
439	if (top_si->si_type == PERLSI_MAIN)	424	if (top_si->si_type == PERLSI_MAIN)
440	break;	425	break;
441		426
442	top_si = top_si->si_prev;	427	top_si = top_si->si_prev;
443	ccstk = top_si->si_cxstack;	428	ccstk = top_si->si_cxstack;
444	cxix = top_si->si_cxix;	429	cxix = top_si->si_cxix;
445	}	430	}
446		431
447	PUTBACK;	432	PUTBACK;
448	}	433	}
449		434
450	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	435	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
451	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	436	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
452	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	437	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		438	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		439	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
453		440
454	c->dowarn = PL_dowarn;	441	#define VAR(name,type)c->name = PL_ ## name;
455	c->in_eval = PL_in_eval;	442	# include "state.h"
456		443	#undef VAR
457	c->curstackinfo = PL_curstackinfo;
458	c->curstack = PL_curstack;
459	c->mainstack = PL_mainstack;
460	c->stack_sp = PL_stack_sp;
461	c->op = PL_op;
462	c->curpad = PL_curpad;
463	c->comppad = PL_comppad;
464	c->compcv = PL_compcv;
465	c->stack_base = PL_stack_base;
466	c->stack_max = PL_stack_max;
467	c->tmps_stack = PL_tmps_stack;
468	c->tmps_floor = PL_tmps_floor;
469	c->tmps_ix = PL_tmps_ix;
470	c->tmps_max = PL_tmps_max;
471	c->markstack = PL_markstack;
472	c->markstack_ptr = PL_markstack_ptr;
473	c->markstack_max = PL_markstack_max;
474	c->scopestack = PL_scopestack;
475	c->scopestack_ix = PL_scopestack_ix;
476	c->scopestack_max = PL_scopestack_max;
477	c->savestack = PL_savestack;
478	c->savestack_ix = PL_savestack_ix;
479	c->savestack_max = PL_savestack_max;
480	#if PERL_VERSION < 9
481	c->retstack = PL_retstack;
482	c->retstack_ix = PL_retstack_ix;
483	c->retstack_max = PL_retstack_max;
484	#endif
485	c->curpm = PL_curpm;
486	c->curcop = PL_curcop;
487	c->top_env = PL_top_env;
488	}	444	}
489		445
490	/*	446	/*
491	* allocate various perl stacks. This is an exact copy	447	* allocate various perl stacks. This is an exact copy
492	* of perl.c:init_stacks, except that it uses less memory	448	* of perl.c:init_stacks, except that it uses less memory
493	* on the (sometimes correct) assumption that coroutines do	449	* on the (sometimes correct) assumption that coroutines do
494	* not usually need a lot of stackspace.	450	* not usually need a lot of stackspace.
495	*/	451	*/
496	STATIC void	452	#if CORO_PREFER_PERL_FUNCTIONS
		453	# define coro_init_stacks init_stacks
		454	#else
		455	static void
497	coro_init_stacks (pTHX)	456	coro_init_stacks (pTHX)
498	{	457	{
499	LOCK;	458	PL_curstackinfo = new_stackinfo(64, 6);
500
501	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
502	PL_curstackinfo->si_type = PERLSI_MAIN;	459	PL_curstackinfo->si_type = PERLSI_MAIN;
503	PL_curstack = PL_curstackinfo->si_stack;	460	PL_curstack = PL_curstackinfo->si_stack;
504	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	461	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
505		462
506	PL_stack_base = AvARRAY(PL_curstack);	463	PL_stack_base = AvARRAY(PL_curstack);
507	PL_stack_sp = PL_stack_base;	464	PL_stack_sp = PL_stack_base;
508	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	465	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
509		466
510	New(50,PL_tmps_stack,96,SV*);	467	New(50,PL_tmps_stack,64,SV*);
511	PL_tmps_floor = -1;	468	PL_tmps_floor = -1;
512	PL_tmps_ix = -1;	469	PL_tmps_ix = -1;
513	PL_tmps_max = 96;	470	PL_tmps_max = 64;
514		471
515	New(54,PL_markstack,16,I32);	472	New(54,PL_markstack,16,I32);
516	PL_markstack_ptr = PL_markstack;	473	PL_markstack_ptr = PL_markstack;
517	PL_markstack_max = PL_markstack + 16;	474	PL_markstack_max = PL_markstack + 16;
518		475
…		…
522		479
523	New(54,PL_scopestack,16,I32);	480	New(54,PL_scopestack,16,I32);
524	PL_scopestack_ix = 0;	481	PL_scopestack_ix = 0;
525	PL_scopestack_max = 16;	482	PL_scopestack_max = 16;
526		483
527	New(54,PL_savestack,96,ANY);	484	New(54,PL_savestack,64,ANY);
528	PL_savestack_ix = 0;	485	PL_savestack_ix = 0;
529	PL_savestack_max = 96;	486	PL_savestack_max = 64;
530		487
531	#if PERL_VERSION < 9	488	#if !PERL_VERSION_ATLEAST (5,9,0)
532	New(54,PL_retstack,8,OP*);	489	New(54,PL_retstack,4,OP*);
533	PL_retstack_ix = 0;	490	PL_retstack_ix = 0;
534	PL_retstack_max = 8;	491	PL_retstack_max = 4;
535	#endif	492	#endif
536
537	UNLOCK;
538	}	493	}
		494	#endif
539		495
540	/*	496	/*
541	* destroy the stacks, the callchain etc...	497	* destroy the stacks, the callchain etc...
542	*/	498	*/
543	STATIC void	499	static void
544	destroy_stacks(pTHX)	500	coro_destroy_stacks (pTHX)
545	{	501	{
546	if (!IN_DESTRUCT)	502	if (!IN_DESTRUCT)
547	{	503	{
548	/* is this ugly, I ask? */	504	/* restore all saved variables and stuff */
549	LEAVE_SCOPE (0);	505	LEAVE_SCOPE (0);
		506	assert (PL_tmps_floor == -1);
550		507
551	/* sure it is, but more important: is it correct?? :/ */	508	/* free all temporaries */
552	FREETMPS;	509	FREETMPS;
		510	assert (PL_tmps_ix == -1);
553		511
		512	/* unwind all extra stacks */
554	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/	513	POPSTACK_TO (PL_mainstack);
		514
		515	/* unwind main stack */
		516	dounwind (-1);
555	}	517	}
556		518
557	while (PL_curstackinfo->si_next)	519	while (PL_curstackinfo->si_next)
558	PL_curstackinfo = PL_curstackinfo->si_next;	520	PL_curstackinfo = PL_curstackinfo->si_next;
559		521
560	while (PL_curstackinfo)	522	while (PL_curstackinfo)
561	{	523	{
562	PERL_SI *p = PL_curstackinfo->si_prev;	524	PERL_SI *p = PL_curstackinfo->si_prev;
563		525
564	{ /*D*//*remove*/
565	dSP;
566	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
567	PUTBACK; /* possibly superfluous */
568	}
569
570	if (!IN_DESTRUCT)	526	if (!IN_DESTRUCT)
571	{
572	dounwind (-1);/*D*//*remove*/
573	SvREFCNT_dec (PL_curstackinfo->si_stack);	527	SvREFCNT_dec (PL_curstackinfo->si_stack);
574	}
575		528
576	Safefree (PL_curstackinfo->si_cxstack);	529	Safefree (PL_curstackinfo->si_cxstack);
577	Safefree (PL_curstackinfo);	530	Safefree (PL_curstackinfo);
578	PL_curstackinfo = p;	531	PL_curstackinfo = p;
579	}	532	}
580		533
581	Safefree (PL_tmps_stack);	534	Safefree (PL_tmps_stack);
582	Safefree (PL_markstack);	535	Safefree (PL_markstack);
583	Safefree (PL_scopestack);	536	Safefree (PL_scopestack);
584	Safefree (PL_savestack);	537	Safefree (PL_savestack);
585	#if PERL_VERSION < 9	538	#if !PERL_VERSION_ATLEAST (5,9,0)
586	Safefree (PL_retstack);	539	Safefree (PL_retstack);
587	#endif	540	#endif
588	}	541	}
589		542
590	static void	543	static size_t
591	allocate_stack (Coro__State ctx, int alloc)	544	coro_rss (struct coro *coro)
592	{	545	{
593	coro_stack *stack;	546	size_t rss = sizeof (coro);
594		547
595	New (0, stack, 1, coro_stack);	548	if (coro->mainstack)
596
597	stack->refcnt = 1;
598	stack->usecnt = 1;
599	stack->gencnt = ctx->gencnt = 0;
600
601	if (alloc)
602	{	549	{
603	#if HAVE_MMAP	550	if (coro->flags & CF_RUNNING)
604	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
605	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
606	if (stack->sptr == (void *)-1)
607	#endif
608	{	551	{
609	stack->ssize = - (STACKSIZE * (long)sizeof (long));	552	#define VAR(name,type)coro->name = PL_ ## name;
610	New (0, stack->sptr, STACKSIZE, long);	553	# include "state.h"
		554	#undef VAR
611	}	555	}
612	}
613	else
614	stack->sptr = 0;
615		556
616	ctx->stack = stack;	557	rss += sizeof (coro->curstackinfo);
617	}	558	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		559	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		560	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		561	rss += coro->tmps_max * sizeof (SV *);
		562	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		563	rss += coro->scopestack_max * sizeof (I32);
		564	rss += coro->savestack_max * sizeof (ANY);
618		565
619	static void	566	#if !PERL_VERSION_ATLEAST (5,9,0)
620	deallocate_stack (Coro__State ctx)	567	rss += coro->retstack_max * sizeof (OP *);
621	{	568	#endif
622	coro_stack *stack = ctx->stack;
623
624	ctx->stack = 0;
625
626	if (stack)
627	{	569	}
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		570
637	Safefree (stack);	571	return rss;
638	}
639	else if (ctx->gencnt == stack->gencnt)
640	--stack->usecnt;
641	}
642	}	572	}
643		573
		574	/** coroutine stack handling ************************************************/
		575
644	static void	576	static void
645	setup_coro (void *arg)	577	setup_coro (pTHX_ struct coro *coro)
646	{	578	{
647	/*	579	/*
648	* emulate part of the perl startup here.	580	* emulate part of the perl startup here.
649	*/	581	*/
		582	coro_init_stacks (aTHX);
		583
		584	PL_curcop = &PL_compiling;
		585	PL_in_eval = EVAL_NULL;
		586	PL_comppad = 0;
		587	PL_curpm = 0;
		588	PL_localizing = 0;
		589	PL_dirty = 0;
		590	PL_restartop = 0;
		591
		592	{
		593	dSP;
		594	LOGOP myop;
		595
		596	SvREFCNT_dec (GvAV (PL_defgv));
		597	GvAV (PL_defgv) = coro->args; coro->args = 0;
		598
		599	Zero (&myop, 1, LOGOP);
		600	myop.op_next = Nullop;
		601	myop.op_flags = OPf_WANT_VOID;
		602
		603	PUSHMARK (SP);
		604	XPUSHs (av_shift (GvAV (PL_defgv)));
		605	PUTBACK;
		606	PL_op = (OP *)&myop;
		607	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		608	SPAGAIN;
		609	}
		610
		611	ENTER; /* necessary e.g. for dounwind */
		612	}
		613
		614	static void
		615	free_coro_mortal (pTHX)
		616	{
		617	if (coro_mortal)
		618	{
		619	SvREFCNT_dec (coro_mortal);
		620	coro_mortal = 0;
		621	}
		622	}
		623
		624	/* inject a fake call to Coro::State::_cctx_init into the execution */
		625	/* _cctx_init should be careful, as it could be called at almost any time */
		626	/* during execution of a perl program */
		627	static void NOINLINE
		628	prepare_cctx (pTHX_ coro_cctx *cctx)
		629	{
		630	dSP;
		631	LOGOP myop;
		632
		633	Zero (&myop, 1, LOGOP);
		634	myop.op_next = PL_op;
		635	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		636
		637	PUSHMARK (SP);
		638	EXTEND (SP, 2);
		639	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		640	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		641	PUTBACK;
		642	PL_op = (OP *)&myop;
		643	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		644	SPAGAIN;
		645	}
		646
		647	/*
		648	* this is a _very_ stripped down perl interpreter ;)
		649	*/
		650	static void
		651	coro_run (void *arg)
		652	{
650	dTHX;	653	dTHX;
651	dSP;
652	Coro__State ctx = (Coro__State)arg;
653	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
654		654
655	coro_init_stacks (aTHX);	655	/* coro_run is the alternative tail of transfer(), so unlock here. */
656	/*PL_curcop = 0;*/	656	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		657
661	SPAGAIN;	658	PL_top_env = &PL_start_env;
662		659
663	if (ctx->stack)	660	/* inject a fake subroutine call to cctx_init */
664	{	661	prepare_cctx (aTHX_ (coro_cctx *)arg);
665	ctx->cursp = 0;
666		662
667	PUSHMARK(SP);	663	/* somebody or something will hit me for both perl_run and PL_restartop */
668	PUTBACK;	664	PL_restartop = PL_op;
669	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	665	perl_run (PL_curinterp);
670		666
671	if (SvTRUE (ERRSV))	667	/*
672	croak (NULL);	668	* If perl-run returns we assume exit() was being called or the coro
673	else	669	* fell off the end, which seems to be the only valid (non-bug)
674	croak ("FATAL: CCTXT coroutine returned!");	670	* reason for perl_run to return. We try to exit by jumping to the
		671	* bootstrap-time "top" top_env, as we cannot restore the "main"
		672	* coroutine as Coro has no such concept
		673	*/
		674	PL_top_env = main_top_env;
		675	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		676	}
		677
		678	static coro_cctx *
		679	cctx_new ()
		680	{
		681	coro_cctx *cctx;
		682	void *stack_start;
		683	size_t stack_size;
		684
		685	++cctx_count;
		686
		687	Newz (0, cctx, 1, coro_cctx);
		688
		689	#if HAVE_MMAP
		690
		691	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		692	/* mmap supposedly does allocate-on-write for us */
		693	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		694
		695	if (cctx->sptr != (void *)-1)
		696	{
		697	# if CORO_STACKGUARD
		698	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		699	# endif
		700	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		701	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		702	cctx->mapped = 1;
675	}	703	}
676	else	704	else
677	{	705	#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	}	706	{
701	}	707	cctx->ssize = coro_stacksize * (long)sizeof (long);
		708	New (0, cctx->sptr, coro_stacksize, long);
702		709
703	static void	710	if (!cctx->sptr)
704	continue_coro (void *arg)	711	{
705	{	712	perror ("FATAL: unable to allocate stack for coroutine");
706	/*	713	_exit (EXIT_FAILURE);
707	* this is a _very_ stripped down perl interpreter ;)	714	}
708	*/
709	dTHX;
710	Coro__State ctx = (Coro__State)arg;
711		715
712	PL_top_env = &ctx->start_env;	716	stack_start = cctx->sptr;
		717	stack_size = cctx->ssize;
		718	}
713		719
714	ctx->cursp = 0;	720	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		721	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		722
		723	return cctx;
		724	}
		725
		726	static void
		727	cctx_destroy (coro_cctx *cctx)
		728	{
		729	if (!cctx)
		730	return;
		731
		732	--cctx_count;
		733
		734	#if CORO_USE_VALGRIND
		735	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		736	#endif
		737
		738	#if HAVE_MMAP
		739	if (cctx->mapped)
		740	munmap (cctx->sptr, cctx->ssize);
		741	else
		742	#endif
		743	Safefree (cctx->sptr);
		744
		745	Safefree (cctx);
		746	}
		747
		748	static coro_cctx *
		749	cctx_get (pTHX)
		750	{
		751	while (cctx_first)
		752	{
		753	coro_cctx *cctx = cctx_first;
		754	cctx_first = cctx->next;
		755	--cctx_idle;
		756
		757	if (cctx->ssize >= coro_stacksize)
		758	return cctx;
		759
		760	cctx_destroy (cctx);
		761	}
		762
715	PL_op = PL_op->op_next;	763	PL_op = PL_op->op_next;
716	CALLRUNOPS(aTHX);	764	return cctx_new ();
717
718	abort ();
719	}	765	}
720		766
721	STATIC void	767	static void
		768	cctx_put (coro_cctx *cctx)
		769	{
		770	/* free another cctx if overlimit */
		771	if (cctx_idle >= MAX_IDLE_CCTX)
		772	{
		773	coro_cctx *first = cctx_first;
		774	cctx_first = first->next;
		775	--cctx_idle;
		776
		777	assert (!first->inuse);
		778	cctx_destroy (first);
		779	}
		780
		781	++cctx_idle;
		782	cctx->next = cctx_first;
		783	cctx_first = cctx;
		784	}
		785
		786	/** coroutine switching *****************************************************/
		787
		788	/* never call directly, always through the coro_state_transfer global variable */
		789	static void NOINLINE
722	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	790	transfer (pTHX_ struct coro *prev, struct coro *next)
723	{	791	{
724	dSTACKLEVEL;	792	dSTACKLEVEL;
725		793
		794	/* sometimes transfer is only called to set idle_sp */
		795	if (!next)
		796	{
		797	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		798	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		799	}
726	if (prev != next)	800	else if (prev != next)
727	{	801	{
728	if (next->mainstack)	802	coro_cctx *prev__cctx;
		803
		804	if (prev->flags & CF_NEW)
729	{	805	{
730	LOCK;	806	/* create a new empty context */
731	SAVE (prev, flags);	807	Newz (0, prev->cctx, 1, coro_cctx);
732	LOAD (next);	808	prev->cctx->inuse = 1;
733	UNLOCK;	809	prev->flags &= ~CF_NEW;
734		810	prev->flags |= CF_RUNNING;
735	/* mark this state as in-use */
736	next->mainstack = 0;
737	next->tmps_ix = -2;
738
739	/* stacklevel changed? if yes, grab the stack for us! */
740	if (flags & TRANSFER_SAVE_CCTXT)
741	{
742	if (!prev->stack)
743	allocate_stack (prev, 0);
744	else if (prev->cursp != stacklevel
745	&& prev->stack->usecnt > 1)
746	{
747	prev->gencnt = ++prev->stack->gencnt;
748	prev->stack->usecnt = 1;
749	}
750
751	/* has our stack been invalidated? */
752	if (next->stack && next->stack->gencnt != next->gencnt)
753	{
754	deallocate_stack (next);
755	allocate_stack (next, 1);
756	coro_create (&(next->stack->cctx),
757	continue_coro, (void *)next,
758	next->stack->sptr, labs (next->stack->ssize));
759	}
760
761	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
762	prev->cursp = stacklevel;
763	/* don't add any code here */
764	}
765	else
766	next->cursp = stacklevel;
767	}	811	}
768	else if (next->tmps_ix == -2)	812
769	croak ("tried to transfer to running coroutine");	813	/*TODO: must not croak here */
		814	if (!prev->flags & CF_RUNNING)
		815	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		816
		817	if (next->flags & CF_RUNNING)
		818	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		819
		820	if (next->flags & CF_DESTROYED)
		821	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		822
		823	prev->flags &= ~CF_RUNNING;
		824	next->flags |= CF_RUNNING;
		825
		826	LOCK;
		827
		828	if (next->flags & CF_NEW)
		829	{
		830	/* need to start coroutine */
		831	next->flags &= ~CF_NEW;
		832	/* first get rid of the old state */
		833	save_perl (aTHX_ prev);
		834	/* setup coroutine call */
		835	setup_coro (aTHX_ next);
		836	/* need a new stack */
		837	assert (!next->cctx);
		838	}
770	else	839	else
771	{	840	{
772	LOCK;	841	/* coroutine already started */
773	SAVE (prev, -1); /* first get rid of the old state */	842	save_perl (aTHX_ prev);
774	UNLOCK;	843	load_perl (aTHX_ next);
775
776	if (flags & TRANSFER_SAVE_CCTXT)
777	{
778	if (!prev->stack)
779	allocate_stack (prev, 0);
780
781	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
782	{
783	PL_top_env = &next->start_env;
784
785	setup_coro (next);
786	next->cursp = stacklevel;
787
788	prev->stack->refcnt++;
789	prev->stack->usecnt++;
790	next->stack = prev->stack;
791	next->gencnt = prev->gencnt;
792	}
793	else
794	{
795	assert (!next->stack);
796	allocate_stack (next, 1);
797	coro_create (&(next->stack->cctx),
798	setup_coro, (void *)next,
799	next->stack->sptr, labs (next->stack->ssize));
800	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
801	prev->cursp = stacklevel;
802	/* don't add any code here */
803	}
804	}
805	else
806	{
807	setup_coro (next);
808	next->cursp = stacklevel;
809	}
810	}	844	}
811	}
812		845
813	LOCK;	846	prev__cctx = prev->cctx;
814	if (coro_mortal)	847
815	{	848	/* possibly "free" the cctx */
816	SvREFCNT_dec (coro_mortal);	849	if (prev__cctx->idle_sp == STACKLEVEL)
817	coro_mortal = 0;	850	{
818	}	851	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		852	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		853
		854	prev->cctx = 0;
		855
		856	cctx_put (prev__cctx);
		857	prev__cctx->inuse = 0;
		858	}
		859
		860	if (!next->cctx)
		861	{
		862	next->cctx = cctx_get (aTHX);
		863	assert (!next->cctx->inuse);
		864	next->cctx->inuse = 1;
		865	}
		866
		867	if (prev__cctx != next->cctx)
		868	{
		869	prev__cctx->top_env = PL_top_env;
		870	PL_top_env = next->cctx->top_env;
		871	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		872	}
		873
		874	free_coro_mortal (aTHX);
819	UNLOCK;	875	UNLOCK;
		876	}
820	}	877	}
821		878
822	#define SV_CORO(sv,func) \	879	struct transfer_args
823	do { \	880	{
824	if (SvROK (sv)) \	881	struct coro *prev, *next;
825	sv = SvRV (sv); \	882	};
826	\
827	if (SvTYPE (sv) == SVt_PVHV) \
828	{ \
829	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
830	\
831	if (!he) \
832	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
833	\
834	(sv) = SvRV (HeVAL(he)); \
835	} \
836	\
837	/* must also be changed inside Coro::Cont::yield */ \
838	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
839	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
840	\
841	} while(0)
842		883
843	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	884	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
844		885
		886	/** high level stuff ********************************************************/
		887
845	static void	888	static int
		889	coro_state_destroy (pTHX_ struct coro *coro)
		890	{
		891	if (coro->flags & CF_DESTROYED)
		892	return 0;
		893
		894	coro->flags |= CF_DESTROYED;
		895
		896	if (coro->flags & CF_READY)
		897	{
		898	/* reduce nready, as destroying a ready coro effectively unreadies it */
		899	/* alternative: look through all ready queues and remove the coro */
		900	LOCK;
		901	--coro_nready;
		902	UNLOCK;
		903	}
		904	else
		905	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		906
		907	if (coro->mainstack && coro->mainstack != main_mainstack)
		908	{
		909	struct coro temp;
		910
		911	assert (!(coro->flags & CF_RUNNING));
		912
		913	Zero (&temp, 1, struct coro);
		914	temp.save = CORO_SAVE_ALL;
		915
		916	if (coro->flags & CF_RUNNING)
		917	croak ("FATAL: tried to destroy currently running coroutine");
		918
		919	save_perl (aTHX_ &temp);
		920	load_perl (aTHX_ coro);
		921
		922	coro_destroy_stacks (aTHX);
		923
		924	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		925
		926	coro->mainstack = 0;
		927	}
		928
		929	cctx_destroy (coro->cctx);
		930	SvREFCNT_dec (coro->args);
		931
		932	if (coro->next) coro->next->prev = coro->prev;
		933	if (coro->prev) coro->prev->next = coro->next;
		934	if (coro == coro_first) coro_first = coro->next;
		935
		936	return 1;
		937	}
		938
		939	static int
		940	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		941	{
		942	struct coro *coro = (struct coro *)mg->mg_ptr;
		943	mg->mg_ptr = 0;
		944
		945	coro->hv = 0;
		946
		947	if (--coro->refcnt < 0)
		948	{
		949	coro_state_destroy (aTHX_ coro);
		950	Safefree (coro);
		951	}
		952
		953	return 0;
		954	}
		955
		956	static int
		957	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		958	{
		959	struct coro *coro = (struct coro *)mg->mg_ptr;
		960
		961	++coro->refcnt;
		962
		963	return 0;
		964	}
		965
		966	static MGVTBL coro_state_vtbl = {
		967	0, 0, 0, 0,
		968	coro_state_free,
		969	0,
		970	#ifdef MGf_DUP
		971	coro_state_dup,
		972	#else
		973	# define MGf_DUP 0
		974	#endif
		975	};
		976
		977	static struct coro *
		978	SvSTATE_ (pTHX_ SV *coro)
		979	{
		980	HV *stash;
		981	MAGIC *mg;
		982
		983	if (SvROK (coro))
		984	coro = SvRV (coro);
		985
		986	stash = SvSTASH (coro);
		987	if (stash != coro_stash && stash != coro_state_stash)
		988	{
		989	/* very slow, but rare, check */
		990	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		991	croak ("Coro::State object required");
		992	}
		993
		994	mg = CORO_MAGIC (coro);
		995	return (struct coro *)mg->mg_ptr;
		996	}
		997
		998	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		999
		1000	static void
		1001	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1002	{
		1003	ta->prev = SvSTATE (prev_sv);
		1004	ta->next = SvSTATE (next_sv);
		1005	}
		1006
		1007	static void
846	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1008	api_transfer (SV *prev_sv, SV *next_sv)
847	{	1009	{
848	SV_CORO (prev, "Coro::transfer");	1010	dTHX;
849	SV_CORO (next, "Coro::transfer");	1011	struct transfer_args ta;
850		1012
851	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1013	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1014	TRANSFER (ta);
		1015	}
		1016
		1017	static int
		1018	api_save (SV *coro_sv, int new_save)
		1019	{
		1020	dTHX;
		1021	struct coro *coro = SvSTATE (coro_sv);
		1022	int old_save = coro->save;
		1023
		1024	if (new_save >= 0)
		1025	coro->save = new_save;
		1026
		1027	return old_save;
852	}	1028	}
853		1029
854	/** Coro ********************************************************************/	1030	/** Coro ********************************************************************/
855		1031
856	#define PRIO_MAX 3
857	#define PRIO_HIGH 1
858	#define PRIO_NORMAL 0
859	#define PRIO_LOW -1
860	#define PRIO_IDLE -3
861	#define PRIO_MIN -4
862
863	/* for Coro.pm */
864	static GV *coro_current, *coro_idle;
865	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
866	static int coro_nready;
867
868	static void	1032	static void
869	coro_enq (pTHX_ SV *sv)	1033	coro_enq (pTHX_ SV *coro_sv)
870	{	1034	{
871	SV **xprio;
872	int prio;
873
874	if (SvTYPE (sv) != SVt_PVHV)
875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
876
877	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
878	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
879
880	prio = prio > PRIO_MAX ? PRIO_MAX
881	: prio < PRIO_MIN ? PRIO_MIN
882	: prio;
883
884	av_push (coro_ready [prio - PRIO_MIN], sv);	1035	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
885	coro_nready++;
886	}	1036	}
887		1037
888	static SV *	1038	static SV *
889	coro_deq (pTHX_ int min_prio)	1039	coro_deq (pTHX_ int min_prio)
890	{	1040	{
…		…
893	min_prio -= PRIO_MIN;	1043	min_prio -= PRIO_MIN;
894	if (min_prio < 0)	1044	if (min_prio < 0)
895	min_prio = 0;	1045	min_prio = 0;
896		1046
897	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1047	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
898	if (av_len (coro_ready[prio]) >= 0)	1048	if (AvFILLp (coro_ready [prio]) >= 0)
899	{
900	coro_nready--;
901	return av_shift (coro_ready[prio]);	1049	return av_shift (coro_ready [prio]);
902	}
903		1050
904	return 0;	1051	return 0;
905	}	1052	}
906		1053
907	static void	1054	static int
908	api_ready (SV *coro)	1055	api_ready (SV *coro_sv)
909	{	1056	{
910	dTHX;	1057	dTHX;
		1058	struct coro *coro;
911		1059
912	if (SvROK (coro))	1060	if (SvROK (coro_sv))
913	coro = SvRV (coro);	1061	coro_sv = SvRV (coro_sv);
		1062
		1063	coro = SvSTATE (coro_sv);
		1064
		1065	if (coro->flags & CF_READY)
		1066	return 0;
		1067
		1068	coro->flags |= CF_READY;
914		1069
915	LOCK;	1070	LOCK;
916	coro_enq (aTHX_ SvREFCNT_inc (coro));	1071	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1072	++coro_nready;
917	UNLOCK;	1073	UNLOCK;
		1074
		1075	return 1;
		1076	}
		1077
		1078	static int
		1079	api_is_ready (SV *coro_sv)
		1080	{
		1081	dTHX;
		1082	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1083	}
		1084
		1085	static void
		1086	prepare_schedule (pTHX_ struct transfer_args *ta)
		1087	{
		1088	SV *prev_sv, *next_sv;
		1089
		1090	for (;;)
		1091	{
		1092	LOCK;
		1093	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1094
		1095	/* nothing to schedule: call the idle handler */
		1096	if (!next_sv)
		1097	{
		1098	dSP;
		1099	UNLOCK;
		1100
		1101	ENTER;
		1102	SAVETMPS;
		1103
		1104	PUSHMARK (SP);
		1105	PUTBACK;
		1106	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1107
		1108	FREETMPS;
		1109	LEAVE;
		1110	continue;
		1111	}
		1112
		1113	ta->next = SvSTATE (next_sv);
		1114
		1115	/* cannot transfer to destroyed coros, skip and look for next */
		1116	if (ta->next->flags & CF_DESTROYED)
		1117	{
		1118	UNLOCK;
		1119	SvREFCNT_dec (next_sv);
		1120	/* coro_nready is already taken care of by destroy */
		1121	continue;
		1122	}
		1123
		1124	--coro_nready;
		1125	UNLOCK;
		1126	break;
		1127	}
		1128
		1129	/* free this only after the transfer */
		1130	prev_sv = SvRV (coro_current);
		1131	SvRV_set (coro_current, next_sv);
		1132	ta->prev = SvSTATE (prev_sv);
		1133
		1134	assert (ta->next->flags & CF_READY);
		1135	ta->next->flags &= ~CF_READY;
		1136
		1137	LOCK;
		1138	free_coro_mortal (aTHX);
		1139	coro_mortal = prev_sv;
		1140	UNLOCK;
		1141	}
		1142
		1143	static void
		1144	prepare_cede (pTHX_ struct transfer_args *ta)
		1145	{
		1146	api_ready (coro_current);
		1147	prepare_schedule (aTHX_ ta);
		1148	}
		1149
		1150	static int
		1151	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1152	{
		1153	if (coro_nready)
		1154	{
		1155	SV *prev = SvRV (coro_current);
		1156	prepare_schedule (aTHX_ ta);
		1157	api_ready (prev);
		1158	return 1;
		1159	}
		1160	else
		1161	return 0;
918	}	1162	}
919		1163
920	static void	1164	static void
921	api_schedule (void)	1165	api_schedule (void)
922	{	1166	{
923	dTHX;	1167	dTHX;
		1168	struct transfer_args ta;
924		1169
925	SV *prev, *next;	1170	prepare_schedule (aTHX_ &ta);
926		1171	TRANSFER (ta);
927	LOCK;
928
929	prev = SvRV (GvSV (coro_current));
930	next = coro_deq (aTHX_ PRIO_MIN);
931
932	if (!next)
933	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
934
935	/* free this only after the transfer */
936	coro_mortal = prev;
937	SV_CORO (prev, "Coro::schedule");
938
939	SvRV (GvSV (coro_current)) = next;
940
941	SV_CORO (next, "Coro::schedule");
942
943	UNLOCK;
944
945	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
946	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
947	}	1172	}
948		1173
949	static void	1174	static int
950	api_cede (void)	1175	api_cede (void)
951	{	1176	{
952	dTHX;	1177	dTHX;
		1178	struct transfer_args ta;
953		1179
954	LOCK;	1180	prepare_cede (aTHX_ &ta);
955	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
956	UNLOCK;
957		1181
958	api_schedule ();	1182	if (ta.prev != ta.next)
		1183	{
		1184	TRANSFER (ta);
		1185	return 1;
		1186	}
		1187	else
		1188	return 0;
		1189	}
		1190
		1191	static int
		1192	api_cede_notself (void)
		1193	{
		1194	dTHX;
		1195	struct transfer_args ta;
		1196
		1197	if (prepare_cede_notself (aTHX_ &ta))
		1198	{
		1199	TRANSFER (ta);
		1200	return 1;
		1201	}
		1202	else
		1203	return 0;
959	}	1204	}
960		1205
961	MODULE = Coro::State PACKAGE = Coro::State	1206	MODULE = Coro::State PACKAGE = Coro::State
962		1207
963	PROTOTYPES: ENABLE	1208	PROTOTYPES: DISABLE
964		1209
965	BOOT:	1210	BOOT:
966	{ /* {} necessary for stoopid perl-5.6.x */	1211	{
967	#ifdef USE_ITHREADS	1212	#ifdef USE_ITHREADS
968	MUTEX_INIT (&coro_mutex);	1213	MUTEX_INIT (&coro_mutex);
969	#endif	1214	#endif
		1215	BOOT_PAGESIZE;
970		1216
971	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
972	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
973	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1217	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
974		1218
975	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1219	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
976	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1220	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
977	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1221	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1222	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1223	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
978	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1224	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1225	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
979		1226
980	main_mainstack = PL_mainstack;	1227	main_mainstack = PL_mainstack;
		1228	main_top_env = PL_top_env;
		1229
		1230	while (main_top_env->je_prev)
		1231	main_top_env = main_top_env->je_prev;
981		1232
982	coroapi.ver = CORO_API_VERSION;	1233	coroapi.ver = CORO_API_VERSION;
983	coroapi.transfer = api_transfer;	1234	coroapi.transfer = api_transfer;
984	}
985		1235
986	Coro::State	1236	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
987	_newprocess(args)	1237	}
988	SV * args	1238
989	PROTOTYPE: $	1239	SV *
		1240	new (char *klass, ...)
990	CODE:	1241	CODE:
991	Coro__State coro;	1242	{
		1243	struct coro *coro;
		1244	HV *hv;
		1245	int i;
992		1246
993	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
994	croak ("Coro::State::_newprocess expects an arrayref");
995
996	Newz (0, coro, 1, struct coro);	1247	Newz (0, coro, 1, struct coro);
		1248	coro->args = newAV ();
		1249	coro->save = CORO_SAVE_DEF;
		1250	coro->flags = CF_NEW;
997		1251
998	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1252	if (coro_first) coro_first->prev = coro;
999	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1253	coro->next = coro_first;
1000	/*coro->stack = 0;*/	1254	coro_first = coro;
1001		1255
1002	/* same as JMPENV_BOOTSTRAP */	1256	coro->hv = hv = newHV ();
1003	/* we might be able to recycle start_env, but safe is safe */	1257	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1004	/*Zero(&coro->start_env, 1, JMPENV);*/	1258	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1005	coro->start_env.je_ret = -1;
1006	coro->start_env.je_mustcatch = TRUE;
1007		1259
1008	RETVAL = coro;	1260	for (i = 1; i < items; i++)
		1261	av_push (coro->args, newSVsv (ST (i)));
		1262	}
1009	OUTPUT:	1263	OUTPUT:
1010	RETVAL	1264	RETVAL
1011		1265
		1266	int
		1267	save (SV *coro, int new_save = -1)
		1268	CODE:
		1269	RETVAL = api_save (coro, new_save);
		1270	OUTPUT:
		1271	RETVAL
		1272
		1273	int
		1274	save_also (SV *coro_sv, int save_also)
		1275	CODE:
		1276	{
		1277	struct coro *coro = SvSTATE (coro_sv);
		1278	RETVAL = coro->save;
		1279	coro->save |= save_also;
		1280	}
		1281	OUTPUT:
		1282	RETVAL
		1283
1012	void	1284	void
1013	transfer(prev, next, flags)	1285	_set_stacklevel (...)
1014	SV *prev	1286	ALIAS:
1015	SV *next	1287	Coro::State::transfer = 1
1016	int flags	1288	Coro::schedule = 2
1017	PROTOTYPE: @	1289	Coro::cede = 3
		1290	Coro::cede_notself = 4
1018	CODE:	1291	CODE:
1019	PUTBACK;	1292	{
1020	SV_CORO (next, "Coro::transfer");	1293	struct transfer_args ta;
1021	SV_CORO (prev, "Coro::transfer");	1294
1022	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1295	switch (ix)
1023	SPAGAIN;	1296	{
		1297	case 0:
		1298	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1299	ta.next = 0;
		1300	break;
		1301
		1302	case 1:
		1303	if (items != 2)
		1304	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1305
		1306	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1307	break;
		1308
		1309	case 2:
		1310	prepare_schedule (aTHX_ &ta);
		1311	break;
		1312
		1313	case 3:
		1314	prepare_cede (aTHX_ &ta);
		1315	break;
		1316
		1317	case 4:
		1318	if (!prepare_cede_notself (aTHX_ &ta))
		1319	XSRETURN_EMPTY;
		1320
		1321	break;
		1322	}
		1323
		1324	BARRIER;
		1325	TRANSFER (ta);
		1326
		1327	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1328	XSRETURN_YES;
		1329	}
		1330
		1331	bool
		1332	_destroy (SV *coro_sv)
		1333	CODE:
		1334	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1335	OUTPUT:
		1336	RETVAL
1024		1337
1025	void	1338	void
1026	DESTROY(coro)
1027	Coro::State coro
1028	CODE:
1029
1030	if (coro->mainstack && coro->mainstack != main_mainstack)
1031	{
1032	struct coro temp;
1033
1034	PUTBACK;
1035	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1036	LOAD (aTHX_ coro);
1037	SPAGAIN;
1038
1039	destroy_stacks (aTHX);
1040
1041	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1042	SPAGAIN;
1043
1044	coro->mainstack = 0;
1045	}
1046
1047	deallocate_stack (coro);
1048	SvREFCNT_dec (coro->args);
1049	Safefree (coro);
1050
1051	void
1052	_exit(code)	1339	_exit (code)
1053	int code	1340	int code
1054	PROTOTYPE: $	1341	PROTOTYPE: $
1055	CODE:	1342	CODE:
1056	_exit (code);	1343	_exit (code);
1057		1344
1058	MODULE = Coro::State PACKAGE = Coro::Cont	1345	int
		1346	cctx_stacksize (int new_stacksize = 0)
		1347	CODE:
		1348	RETVAL = coro_stacksize;
		1349	if (new_stacksize)
		1350	coro_stacksize = new_stacksize;
		1351	OUTPUT:
		1352	RETVAL
1059		1353
1060	# this is slightly dirty (should expose a c-level api)	1354	int
		1355	cctx_count ()
		1356	CODE:
		1357	RETVAL = cctx_count;
		1358	OUTPUT:
		1359	RETVAL
		1360
		1361	int
		1362	cctx_idle ()
		1363	CODE:
		1364	RETVAL = cctx_idle;
		1365	OUTPUT:
		1366	RETVAL
1061		1367
1062	void	1368	void
1063	yield(...)	1369	list ()
1064	PROTOTYPE: @	1370	PPCODE:
		1371	{
		1372	struct coro *coro;
		1373	for (coro = coro_first; coro; coro = coro->next)
		1374	if (coro->hv)
		1375	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1376	}
		1377
		1378	void
		1379	_eval (Coro::State coro, SV *coderef)
		1380	CODE:
		1381	{
		1382	if (coro->mainstack)
		1383	{
		1384	struct coro temp;
		1385	Zero (&temp, 1, struct coro);
		1386	temp.save = CORO_SAVE_ALL;
		1387
		1388	if (!(coro->flags & CF_RUNNING))
		1389	{
		1390	save_perl (aTHX_ &temp);
		1391	load_perl (aTHX_ coro);
		1392	}
		1393
		1394	{
		1395	dSP;
		1396	ENTER;
		1397	SAVETMPS;
		1398	PUSHMARK (SP);
		1399	PUTBACK;
		1400	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1401	SPAGAIN;
		1402	FREETMPS;
		1403	LEAVE;
		1404	PUTBACK;
		1405	}
		1406
		1407	if (!(coro->flags & CF_RUNNING))
		1408	{
		1409	save_perl (aTHX_ coro);
		1410	load_perl (aTHX_ &temp);
		1411	}
		1412	}
		1413	}
		1414
		1415	SV *
		1416	is_ready (Coro::State coro)
		1417	PROTOTYPE: $
		1418	ALIAS:
		1419	is_ready = CF_READY
		1420	is_running = CF_RUNNING
		1421	is_new = CF_NEW
		1422	is_destroyed = CF_DESTROYED
		1423	CODE:
		1424	RETVAL = boolSV (coro->flags & ix);
		1425	OUTPUT:
		1426	RETVAL
		1427
		1428	IV
		1429	rss (Coro::State coro)
		1430	PROTOTYPE: $
1065	CODE:	1431	CODE:
1066	SV *yieldstack;	1432	RETVAL = coro_rss (coro);
1067	SV *sv;	1433	OUTPUT:
1068	AV *defav = GvAV (PL_defgv);	1434	RETVAL
1069	struct coro *prev, *next;
1070		1435
1071	yieldstack = *hv_fetch (
1072	(HV *)SvRV (GvSV (coro_current)),
1073	"yieldstack", sizeof ("yieldstack") - 1,
1074	0
1075	);
1076
1077	/* set up @_ -- ugly */
1078	av_clear (defav);
1079	av_fill (defav, items - 1);
1080	while (items--)
1081	av_store (defav, items, SvREFCNT_inc (ST(items)));
1082
1083	sv = av_pop ((AV *)SvRV (yieldstack));
1084	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1085	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1086	SvREFCNT_dec (sv);
1087
1088	transfer (aTHX_ prev, next, 0);
1089		1436
1090	MODULE = Coro::State PACKAGE = Coro	1437	MODULE = Coro::State PACKAGE = Coro
1091		1438
1092	# this is slightly dirty (should expose a c-level api)
1093
1094	BOOT:	1439	BOOT:
1095	{	1440	{
1096	int i;	1441	int i;
		1442
1097	HV *stash = gv_stashpv ("Coro", TRUE);	1443	coro_stash = gv_stashpv ("Coro", TRUE);
1098		1444
1099	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1445	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1100	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1446	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1101	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1447	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1102	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1448	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1103	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1449	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1104	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1450	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1105		1451
1106	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1452	coro_current = get_sv ("Coro::current", FALSE);
1107	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1453	SvREADONLY_on (coro_current);
1108		1454
1109	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1455	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1110	coro_ready[i] = newAV ();	1456	coro_ready[i] = newAV ();
1111		1457
1112	{	1458	{
1113	SV *sv = perl_get_sv("Coro::API", 1);	1459	SV *sv = perl_get_sv("Coro::API", 1);
1114		1460
1115	coroapi.schedule = api_schedule;	1461	coroapi.schedule = api_schedule;
		1462	coroapi.save = api_save;
1116	coroapi.cede = api_cede;	1463	coroapi.cede = api_cede;
		1464	coroapi.cede_notself = api_cede_notself;
1117	coroapi.ready = api_ready;	1465	coroapi.ready = api_ready;
		1466	coroapi.is_ready = api_is_ready;
1118	coroapi.nready = &coro_nready;	1467	coroapi.nready = &coro_nready;
1119	coroapi.current = coro_current;	1468	coroapi.current = coro_current;
1120		1469
1121	GCoroAPI = &coroapi;	1470	GCoroAPI = &coroapi;
1122	sv_setiv(sv, (IV)&coroapi);	1471	sv_setiv (sv, (IV)&coroapi);
1123	SvREADONLY_on(sv);	1472	SvREADONLY_on (sv);
1124	}	1473	}
1125	}	1474	}
1126		1475
1127	#if !PERL_MICRO
1128
1129	void	1476	void
1130	ready(self)	1477	_set_current (SV *current)
1131	SV * self
1132	PROTOTYPE: $	1478	PROTOTYPE: $
1133	CODE:	1479	CODE:
1134	api_ready (self);	1480	SvREFCNT_dec (SvRV (coro_current));
1135		1481	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1136	#endif
1137		1482
1138	int	1483	int
		1484	prio (Coro::State coro, int newprio = 0)
		1485	ALIAS:
		1486	nice = 1
		1487	CODE:
		1488	{
		1489	RETVAL = coro->prio;
		1490
		1491	if (items > 1)
		1492	{
		1493	if (ix)
		1494	newprio = coro->prio - newprio;
		1495
		1496	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1497	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1498
		1499	coro->prio = newprio;
		1500	}
		1501	}
		1502	OUTPUT:
		1503	RETVAL
		1504
		1505	SV *
		1506	ready (SV *self)
		1507	PROTOTYPE: $
		1508	CODE:
		1509	RETVAL = boolSV (api_ready (self));
		1510	OUTPUT:
		1511	RETVAL
		1512
		1513	int
1139	nready(...)	1514	nready (...)
1140	PROTOTYPE:	1515	PROTOTYPE:
1141	CODE:	1516	CODE:
1142	RETVAL = coro_nready;	1517	RETVAL = coro_nready;
1143	OUTPUT:	1518	OUTPUT:
1144	RETVAL	1519	RETVAL
1145		1520
1146	void	1521	MODULE = Coro::State PACKAGE = Coro::AIO
1147	schedule(...)	1522
1148	PROTOTYPE:	1523	SV *
		1524	_get_state ()
1149	CODE:	1525	CODE:
1150	api_schedule ();
1151
1152	void
1153	cede(...)
1154	PROTOTYPE:
1155	CODE:
1156	api_cede ();
1157
1158	# and these are hacks
1159	SV *
1160	_aio_get_state ()
1161	CODE:
1162	{	1526	{
1163	struct {	1527	struct io_state *data;
1164	int errorno;
1165	int laststype;
1166	int laststatval;
1167	Stat_t statcache;
1168	} data;
1169		1528
		1529	RETVAL = newSV (sizeof (struct io_state));
		1530	data = (struct io_state *)SvPVX (RETVAL);
		1531	SvCUR_set (RETVAL, sizeof (struct io_state));
		1532	SvPOK_only (RETVAL);
		1533
1170	data.errorno = errno;	1534	data->errorno = errno;
1171	data.laststype = PL_laststype;	1535	data->laststype = PL_laststype;
1172	data.laststatval = PL_laststatval;	1536	data->laststatval = PL_laststatval;
1173	data.statcache = PL_statcache;	1537	data->statcache = PL_statcache;
1174
1175	RETVAL = newSVpvn ((char *)&data, sizeof data);
1176	}	1538	}
1177	OUTPUT:	1539	OUTPUT:
1178	RETVAL	1540	RETVAL
1179		1541
1180	void	1542	void
1181	_aio_set_state (char *data_)	1543	_set_state (char *data_)
1182	PROTOTYPE: $	1544	PROTOTYPE: $
1183	CODE:	1545	CODE:
1184	{	1546	{
1185	struct {	1547	struct io_state *data = (void *)data_;
1186	int errorno;
1187	int laststype;
1188	int laststatval;
1189	Stat_t statcache;
1190	} *data = (void *)data_;
1191		1548
1192	errno = data->errorno;	1549	errno = data->errorno;
1193	PL_laststype = data->laststype;	1550	PL_laststype = data->laststype;
1194	PL_laststatval = data->laststatval;	1551	PL_laststatval = data->laststatval;
1195	PL_statcache = data->statcache;	1552	PL_statcache = data->statcache;
1196	}	1553	}
		1554

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