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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.55 by pcg, Thu Apr 1 02:29:05 2004 UTC vs.
Revision 1.177 by root, Tue Oct 2 10:24:44 2007 UTC

…		…
		1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#include "patchlevel.h"	9	#include "patchlevel.h"
6		10
7	#if PATCHLEVEL < 6	11	#include <stdio.h>
		12	#include <errno.h>
		13	#include <assert.h>
		14
		15	#ifdef HAVE_MMAP
		16	# include <unistd.h>
		17	# include <sys/mman.h>
		18	# ifndef MAP_ANONYMOUS
		19	# ifdef MAP_ANON
		20	# define MAP_ANONYMOUS MAP_ANON
		21	# else
		22	# undef HAVE_MMAP
		23	# endif
		24	# endif
		25	# include <limits.h>
		26	# ifndef PAGESIZE
		27	# define PAGESIZE pagesize
		28	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		29	static long pagesize;
		30	# else
		31	# define BOOT_PAGESIZE (void)0
		32	# endif
		33	#else
		34	# define PAGESIZE 0
		35	# define BOOT_PAGESIZE (void)0
		36	#endif
		37
		38	#if CORO_USE_VALGRIND
		39	# include <valgrind/valgrind.h>
		40	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		41	#else
		42	# define REGISTER_STACK(cctx,start,end)
		43	#endif
		44
		45	/* the maximum number of idle cctx that will be pooled */
		46	#define MAX_IDLE_CCTX 8
		47
		48	#define PERL_VERSION_ATLEAST(a,b,c) \
		49	(PERL_REVISION > (a) \
		50	\|\| (PERL_REVISION == (a) \
		51	&& (PERL_VERSION > (b) \
		52	\|\| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		53
		54	#if !PERL_VERSION_ATLEAST (5,6,0)
8	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
9	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
10	# endif	57	# endif
11	# ifndef call_sv	58	# ifndef call_sv
12	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
23	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
24	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
25	# endif	72	# endif
26	#endif	73	#endif
27		74
28	#include "libcoro/coro.c"	75	/* 5.8.7 */
29		76	#ifndef SvRV_set
30	#include <signal.h>	77	# define SvRV_set(s,v) SvRV(s) = (v)
31
32	#ifdef HAVE_MMAP
33	# include <unistd.h>
34	# include <sys/mman.h>
35	# ifndef MAP_ANONYMOUS
36	# ifdef MAP_ANON
37	# define MAP_ANONYMOUS MAP_ANON
38	# else
39	# undef HAVE_MMAP
40	# endif
41	# endif	78	#endif
42	#endif
43		79
44	#define SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
45	#define UCORO_STATE "_coro_state"	81	# undef CORO_STACKGUARD
		82	#endif
46		83
47	/* The next macro should declare a variable stacklevel that contains and approximation	84	#ifndef CORO_STACKGUARD
48	* to the current C stack pointer. Its property is that it changes with each call	85	# define CORO_STACKGUARD 0
49	* 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
50	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
51		97
52	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
53		99
54	#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))
55		109
56	#include "CoroAPI.h"	110	#include "CoroAPI.h"
57		111
58	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
59	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
60	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
61	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
62	#else	116	#else
63	# define LOCK 0	117	# define LOCK (void)0
64	# define UNLOCK 0	118	# define UNLOCK (void)0
65	#endif	119	#endif
66		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;
67	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
		132	static AV main_mainstack; / used to differentiate between $main and others */
		133	static JMPENV *main_top_env;
		134	static HV coro_state_stash, coro_stash;
		135	static SV coro_mortal; / will be freed after next transfer */
68		136
69	/* this is actually not only the c stack but also c registers etc... */	137	/* async_pool helper stuff */
		138	static SV *sv_pool_rss;
		139	static SV *sv_pool_size;
		140	static AV *av_async_pool;
		141
		142	static struct coro_cctx *cctx_first;
		143	static int cctx_count, cctx_idle;
		144
		145	enum {
		146	CC_MAPPED = 0x01,
		147	CC_NOREUSE = 0x02, /* throw this away after tracing */
		148	CC_TRACE = 0x04,
		149	CC_TRACE_SUB = 0x08, /* trace sub calls */
		150	CC_TRACE_LINE = 0x10, /* trace each statement */
		151	CC_TRACE_ALL = CC_TRACE_SUB \| CC_TRACE_LINE,
		152	};
		153
		154	/* this is a structure representing a c-level coroutine */
70	typedef struct {	155	typedef struct coro_cctx {
71	int refcnt; /* pointer reference counter */	156	struct coro_cctx *next;
72	int usecnt; /* shared by how many coroutines */
73	int gencnt; /* generation counter */
74		157
		158	/* the stack */
		159	void *sptr;
		160	size_t ssize;
		161
		162	/* cpu state */
		163	void idle_sp; / sp of top-level transfer/schedule/cede call */
		164	JMPENV idle_te; / same as idle_sp, but for top_env, TODO: remove once stable */
		165	JMPENV *top_env;
75	coro_context cctx;	166	coro_context cctx;
76		167
77	void *sptr;	168	#if CORO_USE_VALGRIND
78	long ssize; /* positive == mmap, otherwise malloc */	169	int valgrind_id;
79	} coro_stack;	170	#endif
		171	unsigned char flags;
		172	} coro_cctx;
80		173
		174	enum {
		175	CF_RUNNING = 0x0001, /* coroutine is running */
		176	CF_READY = 0x0002, /* coroutine is ready */
		177	CF_NEW = 0x0004, /* has never been switched to */
		178	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		179	};
		180
		181	/* this is a structure representing a perl-level coroutine */
81	struct coro {	182	struct coro {
82	/* the top-level JMPENV for each coroutine, needed to catch dies. */	183	/* the c coroutine allocated to this perl coroutine, if any */
83	JMPENV start_env;	184	coro_cctx *cctx;
84
85	/* the optional C context */
86	coro_stack *stack;
87	void *cursp;
88	int gencnt;
89
90	/* optionally saved, might be zero */
91	AV *defav;
92	SV *defsv;
93	SV *errsv;
94
95	/* saved global state not related to stacks */
96	U8 dowarn;
97	I32 in_eval;
98
99	/* the stacks and related info (callchain etc..) */
100	PERL_SI *curstackinfo;
101	AV *curstack;
102	AV *mainstack;
103	SV **stack_sp;
104	OP *op;
105	SV **curpad;
106	AV *comppad;
107	SV **stack_base;
108	SV **stack_max;
109	SV **tmps_stack;
110	I32 tmps_floor;
111	I32 tmps_ix;
112	I32 tmps_max;
113	I32 *markstack;
114	I32 *markstack_ptr;
115	I32 *markstack_max;
116	I32 *scopestack;
117	I32 scopestack_ix;
118	I32 scopestack_max;
119	ANY *savestack;
120	I32 savestack_ix;
121	I32 savestack_max;
122	OP **retstack;
123	I32 retstack_ix;
124	I32 retstack_max;
125	COP *curcop;
126	JMPENV *top_env;
127		185
128	/* data associated with this coroutine (initial args) */	186	/* data associated with this coroutine (initial args) */
129	AV *args;	187	AV *args;
		188	int refcnt;
		189	int save; /* CORO_SAVE flags */
		190	int flags; /* CF_ flags */
		191
		192	/* optionally saved, might be zero */
		193	AV defav; / @_ */
		194	SV defsv; / $_ */
		195	SV errsv; / $@ */
		196	GV deffh; / default filehandle */
		197	SV irssv; / $/ */
		198	SV irssv_sv; / real $/ cache */
		199
		200	#define VAR(name,type) type name;
		201	# include "state.h"
		202	#undef VAR
		203
		204	/* statistics */
		205	int usecount; /* number of switches to this coro */
		206
		207	/* coro process data */
		208	int prio;
		209
		210	/* linked list */
		211	struct coro next, prev;
		212	HV hv; / the perl hash associated with this coro, if any */
130	};	213	};
131		214
132	typedef struct coro *Coro__State;	215	typedef struct coro *Coro__State;
133	typedef struct coro *Coro__State_or_hashref;	216	typedef struct coro *Coro__State_or_hashref;
134		217
135	static AV main_mainstack; / used to differentiate between $main and others */	218	/ Coro ******************************************************************/
136	static HV *coro_state_stash;
137	static SV *ucoro_state_sv;
138	static U32 ucoro_state_hash;
139	static SV coro_mortal; / will be freed after next transfer */
140		219
141	/* mostly copied from op.c:cv_clone2 */	220	#define PRIO_MAX 3
142	STATIC AV *	221	#define PRIO_HIGH 1
143	clone_padlist (AV *protopadlist)	222	#define PRIO_NORMAL 0
		223	#define PRIO_LOW -1
		224	#define PRIO_IDLE -3
		225	#define PRIO_MIN -4
		226
		227	/* for Coro.pm */
		228	static SV *coro_current;
		229	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		230	static int coro_nready;
		231	static struct coro *coro_first;
		232
		233	/ lowlevel stuff ********************************************************/
		234
		235	static AV *
		236	coro_clone_padlist (pTHX_ CV *cv)
144	{	237	{
145	AV *av;	238	AV *padlist = CvPADLIST (cv);
146	I32 ix;
147	AV protopad_name = (AV ) * av_fetch (protopadlist, 0, FALSE);
148	AV protopad = (AV ) * av_fetch (protopadlist, 1, FALSE);
149	SV **pname = AvARRAY (protopad_name);
150	SV **ppad = AvARRAY (protopad);
151	I32 fname = AvFILLp (protopad_name);
152	I32 fpad = AvFILLp (protopad);
153	AV newpadlist, newpad_name, *newpad;	239	AV newpadlist, newpad;
154	SV **npad;
155
156	newpad_name = newAV ();
157	for (ix = fname; ix >= 0; ix--)
158	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
159
160	newpad = newAV ();
161	av_fill (newpad, AvFILLp (protopad));
162	npad = AvARRAY (newpad);
163		240
164	newpadlist = newAV ();	241	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	242	AvREAL_off (newpadlist);
166	av_store (newpadlist, 0, (SV *) newpad_name);	243	#if PERL_VERSION_ATLEAST (5,9,0)
		244	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		245	#else
		246	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		247	#endif
		248	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		249	--AvFILLp (padlist);
		250
		251	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
167	av_store (newpadlist, 1, (SV *) newpad);	252	av_store (newpadlist, 1, (SV *)newpad);
168
169	av = newAV (); /* will be @_ */
170	av_extend (av, 0);
171	av_store (newpad, 0, (SV *) av);
172	AvFLAGS (av) = AVf_REIFY;
173
174	for (ix = fpad; ix > 0; ix--)
175	{
176	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
177
178	if (namesv && namesv != &PL_sv_undef)
179	{
180	char name = SvPVX (namesv); / XXX */
181
182	if (SvFLAGS (namesv) & SVf_FAKE \|\| *name == '&')
183	{ /* lexical from outside? */
184	npad[ix] = SvREFCNT_inc (ppad[ix]);
185	}
186	else
187	{ /* our own lexical */
188	SV *sv;
189	if (*name == '&')
190	sv = SvREFCNT_inc (ppad[ix]);
191	else if (*name == '@')
192	sv = (SV *) newAV ();
193	else if (*name == '%')
194	sv = (SV *) newHV ();
195	else
196	sv = NEWSV (0, 0);
197
198	#ifdef SvPADBUSY
199	if (!SvPADBUSY (sv))
200	#endif
201	SvPADMY_on (sv);
202
203	npad[ix] = sv;
204	}
205	}
206	else if (IS_PADGV (ppad[ix]) \|\| IS_PADCONST (ppad[ix]))
207	{
208	npad[ix] = SvREFCNT_inc (ppad[ix]);
209	}
210	else
211	{
212	SV *sv = NEWSV (0, 0);
213	SvPADTMP_on (sv);
214	npad[ix] = sv;
215	}
216	}
217
218	#if 0 /* return -ENOTUNDERSTOOD */
219	/* Now that vars are all in place, clone nested closures. */
220
221	for (ix = fpad; ix > 0; ix--) {
222	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
223	if (namesv
224	&& namesv != &PL_sv_undef
225	&& !(SvFLAGS(namesv) & SVf_FAKE)
226	&& *SvPVX(namesv) == '&'
227	&& CvCLONE(ppad[ix]))
228	{
229	CV kid = cv_clone((CV)ppad[ix]);
230	SvREFCNT_dec(ppad[ix]);
231	CvCLONE_on(kid);
232	SvPADMY_on(kid);
233	npad[ix] = (SV*)kid;
234	}
235	}
236	#endif
237		253
238	return newpadlist;	254	return newpadlist;
239	}	255	}
240		256
241	STATIC void	257	static void
242	free_padlist (AV *padlist)	258	free_padlist (pTHX_ AV *padlist)
243	{	259	{
244	/* may be during global destruction */	260	/* may be during global destruction */
245	if (SvREFCNT (padlist))	261	if (SvREFCNT (padlist))
246	{	262	{
247	I32 i = AvFILLp (padlist);	263	I32 i = AvFILLp (padlist);
…		…
260		276
261	SvREFCNT_dec ((SV*)padlist);	277	SvREFCNT_dec ((SV*)padlist);
262	}	278	}
263	}	279	}
264		280
265	STATIC int	281	static int
266	coro_cv_free (pTHX_ SV sv, MAGIC mg)	282	coro_cv_free (pTHX_ SV sv, MAGIC mg)
267	{	283	{
268	AV *padlist;	284	AV *padlist;
269	AV av = (AV )mg->mg_obj;	285	AV av = (AV )mg->mg_obj;
270		286
271	/* casting is fun. */	287	/* casting is fun. */
272	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))	288	while (&PL_sv_undef != (SV )(padlist = (AV )av_pop (av)))
273	free_padlist (padlist);	289	free_padlist (aTHX_ padlist);
		290
		291	SvREFCNT_dec (av);
		292
		293	return 0;
274	}	294	}
275		295
276	#define PERL_MAGIC_coro PERL_MAGIC_ext	296	#define PERL_MAGIC_coro PERL_MAGIC_ext
277		297
278	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	298	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
279		299
		300	#define CORO_MAGIC(cv) \
		301	SvMAGIC (cv) \
		302	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		303	? SvMAGIC (cv) \
		304	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		305	: 0
		306
		307	static struct coro *
		308	SvSTATE_ (pTHX_ SV *coro)
		309	{
		310	HV *stash;
		311	MAGIC *mg;
		312
		313	if (SvROK (coro))
		314	coro = SvRV (coro);
		315
		316	if (SvTYPE (coro) != SVt_PVHV)
		317	croak ("Coro::State object required");
		318
		319	stash = SvSTASH (coro);
		320	if (stash != coro_stash && stash != coro_state_stash)
		321	{
		322	/* very slow, but rare, check */
		323	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		324	croak ("Coro::State object required");
		325	}
		326
		327	mg = CORO_MAGIC (coro);
		328	return (struct coro *)mg->mg_ptr;
		329	}
		330
		331	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		332
280	/* the next two functions merely cache the padlists */	333	/* the next two functions merely cache the padlists */
281	STATIC void	334	static void
282	get_padlist (CV *cv)	335	get_padlist (pTHX_ CV *cv)
283	{	336	{
284	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	337	MAGIC *mg = CORO_MAGIC (cv);
		338	AV *av;
285		339
286	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	340	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
287	CvPADLIST (cv) = (AV )av_pop ((AV )mg->mg_obj);	341	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
288	else	342	else
		343	{
		344	#if CORO_PREFER_PERL_FUNCTIONS
		345	/* this is probably cleaner, but also slower? */
		346	CV *cp = Perl_cv_clone (cv);
		347	CvPADLIST (cv) = CvPADLIST (cp);
		348	CvPADLIST (cp) = 0;
		349	SvREFCNT_dec (cp);
		350	#else
289	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	351	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		352	#endif
		353	}
290	}	354	}
291		355
292	STATIC void	356	static void
293	put_padlist (CV *cv)	357	put_padlist (pTHX_ CV *cv)
294	{	358	{
295	MAGIC mg = mg_find ((SV )cv, PERL_MAGIC_coro);	359	MAGIC *mg = CORO_MAGIC (cv);
		360	AV *av;
296		361
297	if (!mg)	362	if (!mg)
298	{	363	{
299	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	364	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
300	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	365	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
301	mg->mg_virtual = &vtbl_coro;	366	mg->mg_virtual = &vtbl_coro;
302	mg->mg_obj = (SV *)newAV ();	367	mg->mg_obj = (SV *)newAV ();
303	}	368	}
304		369
305	av_push ((AV )mg->mg_obj, (SV )CvPADLIST (cv));	370	av = (AV *)mg->mg_obj;
		371
		372	if (AvFILLp (av) >= AvMAX (av))
		373	av_extend (av, AvMAX (av) + 1);
		374
		375	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
306	}	376	}
		377
		378	/ load & save, init *****************************************************/
307		379
308	#define SB do {	380	#define SB do {
309	#define SE } while (0)	381	#define SE } while (0)
310		382
311	#define LOAD(state) load_state(aTHX_ (state));
312	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));
313
314	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	383	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
315		384
316	static void	385	static void
317	load_state(pTHX_ Coro__State c)	386	load_perl (pTHX_ Coro__State c)
318	{	387	{
319	PL_dowarn = c->dowarn;	388	#define VAR(name,type) PL_ ## name = c->name;
320	PL_in_eval = c->in_eval;	389	# include "state.h"
321		390	#undef VAR
322	PL_curstackinfo = c->curstackinfo;
323	PL_curstack = c->curstack;
324	PL_mainstack = c->mainstack;
325	PL_stack_sp = c->stack_sp;
326	PL_op = c->op;
327	PL_curpad = c->curpad;
328	PL_comppad = c->comppad;
329	PL_stack_base = c->stack_base;
330	PL_stack_max = c->stack_max;
331	PL_tmps_stack = c->tmps_stack;
332	PL_tmps_floor = c->tmps_floor;
333	PL_tmps_ix = c->tmps_ix;
334	PL_tmps_max = c->tmps_max;
335	PL_markstack = c->markstack;
336	PL_markstack_ptr = c->markstack_ptr;
337	PL_markstack_max = c->markstack_max;
338	PL_scopestack = c->scopestack;
339	PL_scopestack_ix = c->scopestack_ix;
340	PL_scopestack_max = c->scopestack_max;
341	PL_savestack = c->savestack;
342	PL_savestack_ix = c->savestack_ix;
343	PL_savestack_max = c->savestack_max;
344	PL_retstack = c->retstack;
345	PL_retstack_ix = c->retstack_ix;
346	PL_retstack_max = c->retstack_max;
347	PL_curcop = c->curcop;
348	PL_top_env = c->top_env;
349		391
350	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	392	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
351	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	393	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
352	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	394	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		395	if (c->deffh) REPLACE_SV (PL_defoutgv , c->deffh);
		396
		397	if (c->irssv)
		398	{
		399	if (c->irssv == PL_rs \|\| sv_eq (PL_rs, c->irssv))
		400	{
		401	SvREFCNT_dec (c->irssv);
		402	c->irssv = 0;
		403	}
		404	else
		405	{
		406	REPLACE_SV (PL_rs, c->irssv);
		407	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		408	sv_setsv (c->irssv_sv, PL_rs);
		409	}
		410	}
353		411
354	{	412	{
355	dSP;	413	dSP;
356	CV *cv;	414	CV *cv;
357		415
358	/* now do the ugly restore mess */	416	/* now do the ugly restore mess */
359	while ((cv = (CV *)POPs))	417	while ((cv = (CV *)POPs))
360	{	418	{
361	AV padlist = (AV )POPs;
362
363	if (padlist)
364	{
365	put_padlist (cv); /* mark this padlist as available */	419	put_padlist (aTHX_ cv); /* mark this padlist as available */
366	CvPADLIST(cv) = padlist;	420	CvDEPTH (cv) = PTR2IV (POPs);
367	}	421	CvPADLIST (cv) = (AV *)POPs;
368
369	++CvDEPTH(cv);
370	}	422	}
371		423
372	PUTBACK;	424	PUTBACK;
373	}	425	}
374	}	426	}
375		427
376	static void	428	static void
377	save_state(pTHX_ Coro__State c, int flags)	429	save_perl (pTHX_ Coro__State c)
378	{	430	{
379	{	431	{
380	dSP;	432	dSP;
381	I32 cxix = cxstack_ix;	433	I32 cxix = cxstack_ix;
382	PERL_CONTEXT *ccstk = cxstack;	434	PERL_CONTEXT *ccstk = cxstack;
…		…
385	/*	437	/*
386	* the worst thing you can imagine happens first - we have to save	438	* the worst thing you can imagine happens first - we have to save
387	* (and reinitialize) all cv's in the whole callchain :(	439	* (and reinitialize) all cv's in the whole callchain :(
388	*/	440	*/
389		441
390	PUSHs (Nullsv);	442	XPUSHs (Nullsv);
391	/* this loop was inspired by pp_caller */	443	/* this loop was inspired by pp_caller */
392	for (;;)	444	for (;;)
393	{	445	{
394	while (cxix >= 0)	446	while (cxix >= 0)
395	{	447	{
396	PERL_CONTEXT *cx = &ccstk[cxix--];	448	PERL_CONTEXT *cx = &ccstk[cxix--];
397		449
398	if (CxTYPE(cx) == CXt_SUB)	450	if (CxTYPE (cx) == CXt_SUB \|\| CxTYPE (cx) == CXt_FORMAT)
399	{	451	{
400	CV *cv = cx->blk_sub.cv;	452	CV *cv = cx->blk_sub.cv;
		453
401	if (CvDEPTH(cv))	454	if (CvDEPTH (cv))
402	{	455	{
403	EXTEND (SP, CvDEPTH(cv)*2);	456	EXTEND (SP, 3);
404
405	while (--CvDEPTH(cv))
406	{
407	/* this tells the restore code to increment CvDEPTH */
408	PUSHs (Nullsv);
409	PUSHs ((SV *)cv);
410	}
411
412	PUSHs ((SV *)CvPADLIST(cv));	457	PUSHs ((SV *)CvPADLIST (cv));
		458	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
413	PUSHs ((SV *)cv);	459	PUSHs ((SV *)cv);
414		460
415	get_padlist (cv); /* this is a monster */	461	CvDEPTH (cv) = 0;
		462	get_padlist (aTHX_ cv);
416	}	463	}
417	}	464	}
418	#ifdef CXt_FORMAT
419	else if (CxTYPE(cx) == CXt_FORMAT)
420	{
421	/* I never used formats, so how should I know how these are implemented? */
422	/* my bold guess is as a simple, plain sub... */
423	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
424	}
425	#endif
426	}	465	}
427		466
428	if (top_si->si_type == PERLSI_MAIN)	467	if (top_si->si_type == PERLSI_MAIN)
429	break;	468	break;
430		469
431	top_si = top_si->si_prev;	470	top_si = top_si->si_prev;
432	ccstk = top_si->si_cxstack;	471	ccstk = top_si->si_cxstack;
433	cxix = top_si->si_cxix;	472	cxix = top_si->si_cxix;
434	}	473	}
435		474
436	PUTBACK;	475	PUTBACK;
437	}	476	}
438		477
439	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	478	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
440	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	479	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
441	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	480	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		481	c->deffh = c->save & CORO_SAVE_DEFFH ? (GV *)SvREFCNT_inc (PL_defoutgv) : 0;
		482	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
442		483
443	c->dowarn = PL_dowarn;	484	#define VAR(name,type)c->name = PL_ ## name;
444	c->in_eval = PL_in_eval;	485	# include "state.h"
445		486	#undef VAR
446	c->curstackinfo = PL_curstackinfo;
447	c->curstack = PL_curstack;
448	c->mainstack = PL_mainstack;
449	c->stack_sp = PL_stack_sp;
450	c->op = PL_op;
451	c->curpad = PL_curpad;
452	c->comppad = PL_comppad;
453	c->stack_base = PL_stack_base;
454	c->stack_max = PL_stack_max;
455	c->tmps_stack = PL_tmps_stack;
456	c->tmps_floor = PL_tmps_floor;
457	c->tmps_ix = PL_tmps_ix;
458	c->tmps_max = PL_tmps_max;
459	c->markstack = PL_markstack;
460	c->markstack_ptr = PL_markstack_ptr;
461	c->markstack_max = PL_markstack_max;
462	c->scopestack = PL_scopestack;
463	c->scopestack_ix = PL_scopestack_ix;
464	c->scopestack_max = PL_scopestack_max;
465	c->savestack = PL_savestack;
466	c->savestack_ix = PL_savestack_ix;
467	c->savestack_max = PL_savestack_max;
468	c->retstack = PL_retstack;
469	c->retstack_ix = PL_retstack_ix;
470	c->retstack_max = PL_retstack_max;
471	c->curcop = PL_curcop;
472	c->top_env = PL_top_env;
473	}	487	}
474		488
475	/*	489	/*
476	* allocate various perl stacks. This is an exact copy	490	* allocate various perl stacks. This is an exact copy
477	* of perl.c:init_stacks, except that it uses less memory	491	* of perl.c:init_stacks, except that it uses less memory
478	* on the (sometimes correct) assumption that coroutines do	492	* on the (sometimes correct) assumption that coroutines do
479	* not usually need a lot of stackspace.	493	* not usually need a lot of stackspace.
480	*/	494	*/
481	STATIC void	495	#if CORO_PREFER_PERL_FUNCTIONS
		496	# define coro_init_stacks init_stacks
		497	#else
		498	static void
482	coro_init_stacks (pTHX)	499	coro_init_stacks (pTHX)
483	{	500	{
484	LOCK;	501	PL_curstackinfo = new_stackinfo(64, 6);
485
486	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
487	PL_curstackinfo->si_type = PERLSI_MAIN;	502	PL_curstackinfo->si_type = PERLSI_MAIN;
488	PL_curstack = PL_curstackinfo->si_stack;	503	PL_curstack = PL_curstackinfo->si_stack;
489	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	504	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
490		505
491	PL_stack_base = AvARRAY(PL_curstack);	506	PL_stack_base = AvARRAY(PL_curstack);
492	PL_stack_sp = PL_stack_base;	507	PL_stack_sp = PL_stack_base;
493	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	508	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
494		509
495	New(50,PL_tmps_stack,96,SV*);	510	New(50,PL_tmps_stack,64,SV*);
496	PL_tmps_floor = -1;	511	PL_tmps_floor = -1;
497	PL_tmps_ix = -1;	512	PL_tmps_ix = -1;
498	PL_tmps_max = 96;	513	PL_tmps_max = 64;
499		514
500	New(54,PL_markstack,16,I32);	515	New(54,PL_markstack,16,I32);
501	PL_markstack_ptr = PL_markstack;	516	PL_markstack_ptr = PL_markstack;
502	PL_markstack_max = PL_markstack + 16;	517	PL_markstack_max = PL_markstack + 16;
503		518
…		…
507		522
508	New(54,PL_scopestack,16,I32);	523	New(54,PL_scopestack,16,I32);
509	PL_scopestack_ix = 0;	524	PL_scopestack_ix = 0;
510	PL_scopestack_max = 16;	525	PL_scopestack_max = 16;
511		526
512	New(54,PL_savestack,96,ANY);	527	New(54,PL_savestack,64,ANY);
513	PL_savestack_ix = 0;	528	PL_savestack_ix = 0;
514	PL_savestack_max = 96;	529	PL_savestack_max = 64;
515		530
		531	#if !PERL_VERSION_ATLEAST (5,9,0)
516	New(54,PL_retstack,8,OP*);	532	New(54,PL_retstack,4,OP*);
517	PL_retstack_ix = 0;	533	PL_retstack_ix = 0;
518	PL_retstack_max = 8;	534	PL_retstack_max = 4;
519		535	#endif
520	UNLOCK;
521	}	536	}
		537	#endif
522		538
523	/*	539	/*
524	* destroy the stacks, the callchain etc...	540	* destroy the stacks, the callchain etc...
525	*/	541	*/
526	STATIC void	542	static void
527	destroy_stacks(pTHX)	543	coro_destroy_stacks (pTHX)
528	{	544	{
529	if (!IN_DESTRUCT)	545	if (!IN_DESTRUCT)
530	{	546	{
531	/* is this ugly, I ask? */	547	/* restore all saved variables and stuff */
532	LEAVE_SCOPE (0);	548	LEAVE_SCOPE (0);
		549	assert (PL_tmps_floor == -1);
533		550
534	/* sure it is, but more important: is it correct?? :/ */	551	/* free all temporaries */
535	FREETMPS;	552	FREETMPS;
		553	assert (PL_tmps_ix == -1);
		554
		555	/* unwind all extra stacks */
		556	POPSTACK_TO (PL_mainstack);
		557
		558	/* unwind main stack */
		559	dounwind (-1);
536	}	560	}
537		561
538	while (PL_curstackinfo->si_next)	562	while (PL_curstackinfo->si_next)
539	PL_curstackinfo = PL_curstackinfo->si_next;	563	PL_curstackinfo = PL_curstackinfo->si_next;
540		564
541	while (PL_curstackinfo)	565	while (PL_curstackinfo)
542	{	566	{
543	PERL_SI *p = PL_curstackinfo->si_prev;	567	PERL_SI *p = PL_curstackinfo->si_prev;
544		568
545	{
546	dSP;
547	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
548	PUTBACK; /* possibly superfluous */
549	}
550
551	if (!IN_DESTRUCT)	569	if (!IN_DESTRUCT)
552	{
553	dounwind(-1);
554	SvREFCNT_dec(PL_curstackinfo->si_stack);	570	SvREFCNT_dec (PL_curstackinfo->si_stack);
555	}
556		571
557	Safefree(PL_curstackinfo->si_cxstack);	572	Safefree (PL_curstackinfo->si_cxstack);
558	Safefree(PL_curstackinfo);	573	Safefree (PL_curstackinfo);
559	PL_curstackinfo = p;	574	PL_curstackinfo = p;
560	}	575	}
561		576
562	Safefree(PL_tmps_stack);	577	Safefree (PL_tmps_stack);
563	Safefree(PL_markstack);	578	Safefree (PL_markstack);
564	Safefree(PL_scopestack);	579	Safefree (PL_scopestack);
565	Safefree(PL_savestack);	580	Safefree (PL_savestack);
		581	#if !PERL_VERSION_ATLEAST (5,9,0)
566	Safefree(PL_retstack);	582	Safefree (PL_retstack);
		583	#endif
567	}	584	}
		585
		586	static size_t
		587	coro_rss (pTHX_ struct coro *coro)
		588	{
		589	size_t rss = sizeof (coro);
		590
		591	if (coro->mainstack)
		592	{
		593	if (coro->flags & CF_RUNNING)
		594	{
		595	#define VAR(name,type)coro->name = PL_ ## name;
		596	# include "state.h"
		597	#undef VAR
		598	}
		599
		600	rss += sizeof (coro->curstackinfo);
		601	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		602	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		603	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstack)) * sizeof (SV *);
		604	rss += coro->tmps_max * sizeof (SV *);
		605	rss += (coro->markstack_max - coro->markstack_ptr) * sizeof (I32);
		606	rss += coro->scopestack_max * sizeof (I32);
		607	rss += coro->savestack_max * sizeof (ANY);
		608
		609	#if !PERL_VERSION_ATLEAST (5,9,0)
		610	rss += coro->retstack_max * sizeof (OP *);
		611	#endif
		612	}
		613
		614	return rss;
		615	}
		616
		617	/ coroutine stack handling **********************************************/
568		618
569	static void	619	static void
570	allocate_stack (Coro__State ctx, int alloc)	620	setup_coro (pTHX_ struct coro *coro)
571	{
572	coro_stack *stack;
573
574	New (0, stack, 1, coro_stack);
575
576	stack->refcnt = 1;
577	stack->usecnt = 1;
578	stack->gencnt = ctx->gencnt = 0;
579
580	if (alloc)
581	{
582	#if HAVE_MMAP
583	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
584	stack->sptr = mmap (0, stack->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
585	if (stack->sptr == (void *)-1)
586	#endif
587	{
588	/FIXME//D//* reasonable stack size! */
589	stack->ssize = - (8192 * sizeof (long));
590	New (0, stack->sptr, 8192, long);
591	}
592	}
593	else
594	stack->sptr = 0;
595
596	ctx->stack = stack;
597	}
598
599	static void
600	deallocate_stack (Coro__State ctx)
601	{
602	coro_stack *stack = ctx->stack;
603
604	ctx->stack = 0;
605
606	if (stack)
607	{
608	if (!--stack->refcnt)
609	{
610	#ifdef HAVE_MMAP
611	if (stack->ssize > 0 && stack->sptr)
612	munmap (stack->sptr, stack->ssize);
613	else
614	#endif
615	Safefree (stack->sptr);
616
617	Safefree (stack);
618	}
619	else if (ctx->gencnt == stack->gencnt)
620	--stack->usecnt;
621	}
622	}
623
624	static void
625	setup_coro (void *arg)
626	{	621	{
627	/*	622	/*
628	* emulate part of the perl startup here.	623	* emulate part of the perl startup here.
629	*/	624	*/
		625	coro_init_stacks (aTHX);
		626
		627	PL_runops = RUNOPS_DEFAULT;
		628	PL_curcop = &PL_compiling;
		629	PL_in_eval = EVAL_NULL;
		630	PL_comppad = 0;
		631	PL_curpm = 0;
		632	PL_localizing = 0;
		633	PL_dirty = 0;
		634	PL_restartop = 0;
		635
		636	{
		637	dSP;
		638	LOGOP myop;
		639
		640	SvREFCNT_dec (GvAV (PL_defgv));
		641	GvAV (PL_defgv) = coro->args; coro->args = 0;
		642
		643	Zero (&myop, 1, LOGOP);
		644	myop.op_next = Nullop;
		645	myop.op_flags = OPf_WANT_VOID;
		646
		647	PUSHMARK (SP);
		648	XPUSHs (av_shift (GvAV (PL_defgv)));
		649	PUTBACK;
		650	PL_op = (OP *)&myop;
		651	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		652	SPAGAIN;
		653	}
		654
		655	ENTER; /* necessary e.g. for dounwind */
		656	}
		657
		658	static void
		659	free_coro_mortal (pTHX)
		660	{
		661	if (coro_mortal)
		662	{
		663	SvREFCNT_dec (coro_mortal);
		664	coro_mortal = 0;
		665	}
		666	}
		667
		668	static int
		669	runops_trace (pTHX)
		670	{
		671	COP *oldcop = 0;
		672	int oldcxix = -2;
		673	struct coro coro = SvSTATE (coro_current); / trace cctx is tied to specific coro */
		674	coro_cctx *cctx = coro->cctx;
		675
		676	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		677	{
		678	PERL_ASYNC_CHECK ();
		679
		680	if (cctx->flags & CC_TRACE_ALL)
		681	{
		682	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		683	{
		684	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		685	SV bot, top;
		686	AV av = newAV (); / return values */
		687	SV **cb;
		688	dSP;
		689
		690	GV *gv = CvGV (cx->blk_sub.cv);
		691	SV *fullname = sv_2mortal (newSV (0));
		692	if (isGV (gv))
		693	gv_efullname3 (fullname, gv, 0);
		694
		695	bot = PL_stack_base + cx->blk_oldsp + 1;
		696	top = cx->blk_gimme == G_ARRAY ? SP + 1
		697	: cx->blk_gimme == G_SCALAR ? bot + 1
		698	: bot;
		699
		700	while (bot < top)
		701	av_push (av, SvREFCNT_inc (*bot++));
		702
		703	PL_runops = RUNOPS_DEFAULT;
		704	ENTER;
		705	SAVETMPS;
		706	EXTEND (SP, 3);
		707	PUSHMARK (SP);
		708	PUSHs (&PL_sv_no);
		709	PUSHs (fullname);
		710	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		711	PUTBACK;
		712	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		713	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		714	SPAGAIN;
		715	FREETMPS;
		716	LEAVE;
		717	PL_runops = runops_trace;
		718	}
		719
		720	if (oldcop != PL_curcop)
		721	{
		722	oldcop = PL_curcop;
		723
		724	if (PL_curcop != &PL_compiling)
		725	{
		726	SV **cb;
		727
		728	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		729	{
		730	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		731
		732	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		733	{
		734	runops_proc_t old_runops = PL_runops;
		735	dSP;
		736	GV *gv = CvGV (cx->blk_sub.cv);
		737	SV *fullname = sv_2mortal (newSV (0));
		738
		739	if (isGV (gv))
		740	gv_efullname3 (fullname, gv, 0);
		741
		742	PL_runops = RUNOPS_DEFAULT;
		743	ENTER;
		744	SAVETMPS;
		745	EXTEND (SP, 3);
		746	PUSHMARK (SP);
		747	PUSHs (&PL_sv_yes);
		748	PUSHs (fullname);
		749	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		750	PUTBACK;
		751	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		752	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		753	SPAGAIN;
		754	FREETMPS;
		755	LEAVE;
		756	PL_runops = runops_trace;
		757	}
		758
		759	oldcxix = cxstack_ix;
		760	}
		761
		762	if (cctx->flags & CC_TRACE_LINE)
		763	{
		764	dSP;
		765
		766	PL_runops = RUNOPS_DEFAULT;
		767	ENTER;
		768	SAVETMPS;
		769	EXTEND (SP, 3);
		770	PL_runops = RUNOPS_DEFAULT;
		771	PUSHMARK (SP);
		772	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		773	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		774	PUTBACK;
		775	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		776	if (cb) call_sv (*cb, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		777	SPAGAIN;
		778	FREETMPS;
		779	LEAVE;
		780	PL_runops = runops_trace;
		781	}
		782	}
		783	}
		784	}
		785	}
		786
		787	TAINT_NOT;
		788	return 0;
		789	}
		790
		791	/* inject a fake call to Coro::State::_cctx_init into the execution */
		792	/* _cctx_init should be careful, as it could be called at almost any time */
		793	/* during execution of a perl program */
		794	static void NOINLINE
		795	prepare_cctx (pTHX_ coro_cctx *cctx)
		796	{
630	dSP;	797	dSP;
631	Coro__State ctx = (Coro__State)arg;	798	LOGOP myop;
632	SV sub_init = (SV )get_cv (SUB_INIT, FALSE);
633		799
634	coro_init_stacks (aTHX);	800	PL_top_env = &PL_start_env;
635	/PL_curcop = 0;/
636	/PL_in_eval = PL_in_eval;/ /* inherit */
637	SvREFCNT_dec (GvAV (PL_defgv));
638	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
639		801
		802	if (cctx->flags & CC_TRACE)
		803	PL_runops = runops_trace;
		804
		805	Zero (&myop, 1, LOGOP);
		806	myop.op_next = PL_op;
		807	myop.op_flags = OPf_WANT_VOID \| OPf_STACKED;
		808
		809	PUSHMARK (SP);
		810	EXTEND (SP, 2);
		811	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		812	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		813	PUTBACK;
		814	PL_op = (OP *)&myop;
		815	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
640	SPAGAIN;	816	SPAGAIN;
		817	}
641		818
642	if (ctx->stack)	819	/*
643	{	820	* this is a _very_ stripped down perl interpreter ;)
644	ctx->cursp = 0;	821	*/
		822	static void
		823	coro_run (void *arg)
		824	{
		825	dTHX;
645		826
646	PUSHMARK(SP);	827	/* coro_run is the alternative tail of transfer(), so unlock here. */
647	PUTBACK;	828	UNLOCK;
648	(void) call_sv (sub_init, G_VOID\|G_NOARGS\|G_EVAL);
649		829
650	if (SvTRUE (ERRSV))	830	/* we now skip the entersub that lead to transfer() */
651	croak (NULL);	831	PL_op = PL_op->op_next;
652	else	832
653	croak ("FATAL: CCTXT coroutine returned!");	833	/* inject a fake subroutine call to cctx_init */
		834	prepare_cctx (aTHX_ (coro_cctx *)arg);
		835
		836	/* somebody or something will hit me for both perl_run and PL_restartop */
		837	PL_restartop = PL_op;
		838	perl_run (PL_curinterp);
		839
		840	/*
		841	* If perl-run returns we assume exit() was being called or the coro
		842	* fell off the end, which seems to be the only valid (non-bug)
		843	* reason for perl_run to return. We try to exit by jumping to the
		844	* bootstrap-time "top" top_env, as we cannot restore the "main"
		845	* coroutine as Coro has no such concept
		846	*/
		847	PL_top_env = main_top_env;
		848	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		849	}
		850
		851	static coro_cctx *
		852	cctx_new ()
		853	{
		854	coro_cctx *cctx;
		855	void *stack_start;
		856	size_t stack_size;
		857
		858	++cctx_count;
		859
		860	Newz (0, cctx, 1, coro_cctx);
		861
		862	#if HAVE_MMAP
		863
		864	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		865	/* mmap supposedly does allocate-on-write for us */
		866	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC\|PROT_READ\|PROT_WRITE, MAP_PRIVATE\|MAP_ANONYMOUS, 0, 0);
		867
		868	if (cctx->sptr != (void *)-1)
		869	{
		870	# if CORO_STACKGUARD
		871	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		872	# endif
		873	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		874	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		875	cctx->flags \|= CC_MAPPED;
654	}	876	}
655	else	877	else
656	{	878	#endif
657	UNOP myop;
658
659	PL_op = (OP *)&myop;
660
661	Zero(&myop, 1, UNOP);
662	myop.op_next = Nullop;
663	myop.op_flags = OPf_WANT_VOID;
664
665	PUSHMARK(SP);
666	XPUSHs (sub_init);
667	/*
668	* the next line is slightly wrong, as PL_op->op_next
669	* is actually being executed so we skip the first op.
670	* that doesn't matter, though, since it is only
671	* pp_nextstate and we never return...
672	* ah yes, and I don't care anyways ;)
673	*/
674	PUTBACK;
675	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
676	SPAGAIN;
677
678	ENTER; /* necessary e.g. for dounwind */
679	}	879	{
		880	cctx->ssize = coro_stacksize * (long)sizeof (long);
		881	New (0, cctx->sptr, coro_stacksize, long);
		882
		883	if (!cctx->sptr)
		884	{
		885	perror ("FATAL: unable to allocate stack for coroutine");
		886	_exit (EXIT_FAILURE);
		887	}
		888
		889	stack_start = cctx->sptr;
		890	stack_size = cctx->ssize;
		891	}
		892
		893	REGISTER_STACK (cctx, (char )stack_start, (char )stack_start + stack_size);
		894	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
		895
		896	return cctx;
680	}	897	}
681		898
682	static void	899	static void
683	continue_coro (void *arg)	900	cctx_destroy (coro_cctx *cctx)
684	{	901	{
685	/*	902	if (!cctx)
686	* this is a _very_ stripped down perl interpreter ;)	903	return;
687	*/
688	Coro__State ctx = (Coro__State)arg;
689	JMPENV coro_start_env;
690		904
691	PL_top_env = &ctx->start_env;	905	--cctx_count;
692		906
693	ctx->cursp = 0;	907	#if CORO_USE_VALGRIND
694	PL_op = PL_op->op_next;	908	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
695	CALLRUNOPS(aTHX);	909	#endif
696		910
697	abort ();	911	#if HAVE_MMAP
698	}	912	if (cctx->flags & CC_MAPPED)
		913	munmap (cctx->sptr, cctx->ssize);
		914	else
		915	#endif
		916	Safefree (cctx->sptr);
699		917
700	STATIC void	918	Safefree (cctx);
		919	}
		920
		921	static coro_cctx *
		922	cctx_get (pTHX)
		923	{
		924	while (cctx_first)
		925	{
		926	coro_cctx *cctx = cctx_first;
		927	cctx_first = cctx->next;
		928	--cctx_idle;
		929
		930	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		931	return cctx;
		932
		933	cctx_destroy (cctx);
		934	}
		935
		936	return cctx_new ();
		937	}
		938
		939	static void
		940	cctx_put (coro_cctx *cctx)
		941	{
		942	/* free another cctx if overlimit */
		943	if (cctx_idle >= MAX_IDLE_CCTX)
		944	{
		945	coro_cctx *first = cctx_first;
		946	cctx_first = first->next;
		947	--cctx_idle;
		948
		949	cctx_destroy (first);
		950	}
		951
		952	++cctx_idle;
		953	cctx->next = cctx_first;
		954	cctx_first = cctx;
		955	}
		956
		957	/ coroutine switching ***************************************************/
		958
		959	static void NOINLINE
		960	transfer_check (pTHX_ struct coro prev, struct coro next)
		961	{
		962	if (prev != next)
		963	{
		964	if (!(prev->flags & (CF_RUNNING \| CF_NEW)))
		965	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		966
		967	if (next->flags & CF_RUNNING)
		968	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		969
		970	if (next->flags & CF_DESTROYED)
		971	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		972
		973	if (PL_lex_state != LEX_NOTPARSING)
		974	croak ("Coro::State::transfer called while parsing, but this is not supported");
		975	}
		976	}
		977
		978	/* always use the TRANSFER macro */
		979	static void NOINLINE
701	transfer (pTHX_ struct coro prev, struct coro next, int flags)	980	transfer (pTHX_ struct coro prev, struct coro next)
702	{	981	{
703	dSTACKLEVEL;	982	dSTACKLEVEL;
704		983
		984	/* sometimes transfer is only called to set idle_sp */
		985	if (!next)
		986	{
		987	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		988	assert (((coro_cctx )prev)->idle_te = PL_top_env); / just for the side-effect when asserts are enabled */
		989	}
705	if (prev != next)	990	else if (prev != next)
706	{	991	{
707	if (next->mainstack)	992	coro_cctx *prev__cctx;
		993
		994	if (prev->flags & CF_NEW)
708	{	995	{
709	LOCK;	996	/* create a new empty context */
710	SAVE (prev, flags);	997	Newz (0, prev->cctx, 1, coro_cctx);
711	LOAD (next);	998	prev->flags &= ~CF_NEW;
712	UNLOCK;	999	prev->flags \|= CF_RUNNING;
713
714	/* mark this state as in-use */
715	next->mainstack = 0;
716	next->tmps_ix = -2;
717
718	/* stacklevel changed? if yes, grab the stack for us! */
719	if (flags & TRANSFER_SAVE_CCTXT)
720	{
721	if (!prev->stack)
722	allocate_stack (prev, 0);
723	else if (prev->cursp != stacklevel
724	&& prev->stack->usecnt > 1)
725	{
726	prev->gencnt = ++prev->stack->gencnt;
727	prev->stack->usecnt = 1;
728	}
729
730	/* has our stack been invalidated? */
731	if (next->stack && next->stack->gencnt != next->gencnt)
732	{
733	deallocate_stack (next);
734	allocate_stack (next, 1);
735	coro_create (&(next->stack->cctx),
736	continue_coro, (void *)next,
737	next->stack->sptr, labs (next->stack->ssize));
738	}
739
740	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
741	prev->cursp = stacklevel;
742	/* don't add any code here */
743	}
744	else
745	next->cursp = stacklevel;
746	}	1000	}
747	else if (next->tmps_ix == -2)	1001
748	croak ("tried to transfer to running coroutine");	1002	prev->flags &= ~CF_RUNNING;
		1003	next->flags \|= CF_RUNNING;
		1004
		1005	LOCK;
		1006
		1007	if (next->flags & CF_NEW)
		1008	{
		1009	/* need to start coroutine */
		1010	next->flags &= ~CF_NEW;
		1011	/* first get rid of the old state */
		1012	save_perl (aTHX_ prev);
		1013	/* setup coroutine call */
		1014	setup_coro (aTHX_ next);
		1015	}
749	else	1016	else
750	{	1017	{
751	LOCK;	1018	/* coroutine already started */
752	SAVE (prev, -1); /* first get rid of the old state */	1019	save_perl (aTHX_ prev);
753	UNLOCK;	1020	load_perl (aTHX_ next);
754
755	if (flags & TRANSFER_SAVE_CCTXT)
756	{
757	if (!prev->stack)
758	allocate_stack (prev, 0);
759
760	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
761	{
762	PL_top_env = &next->start_env;
763
764	setup_coro (next);
765	next->cursp = stacklevel;
766
767	prev->stack->refcnt++;
768	prev->stack->usecnt++;
769	next->stack = prev->stack;
770	next->gencnt = prev->gencnt;
771	}
772	else
773	{
774	assert (!next->stack);
775	allocate_stack (next, 1);
776	coro_create (&(next->stack->cctx),
777	setup_coro, (void *)next,
778	next->stack->sptr, labs (next->stack->ssize));
779	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
780	prev->cursp = stacklevel;
781	/* don't add any code here */
782	}
783	}
784	else
785	{
786	setup_coro (next);
787	next->cursp = stacklevel;
788	}
789	}	1021	}
790	}
791		1022
792	LOCK;	1023	prev__cctx = prev->cctx;
793	if (coro_mortal)	1024
794	{	1025	/* possibly "free" the cctx */
795	SvREFCNT_dec (coro_mortal);	1026	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
796	coro_mortal = 0;	1027	{
797	}	1028	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1029	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1030
		1031	prev->cctx = 0;
		1032
		1033	cctx_put (prev__cctx);
		1034	}
		1035
		1036	++next->usecount;
		1037
		1038	if (!next->cctx)
		1039	next->cctx = cctx_get (aTHX);
		1040
		1041	if (prev__cctx != next->cctx)
		1042	{
		1043	prev__cctx->top_env = PL_top_env;
		1044	PL_top_env = next->cctx->top_env;
		1045	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1046	}
		1047
		1048	free_coro_mortal (aTHX);
798	UNLOCK;	1049	UNLOCK;
		1050	}
799	}	1051	}
800		1052
801	#define SV_CORO(sv,func) \	1053	struct transfer_args
802	do { \	1054	{
803	if (SvROK (sv)) \	1055	struct coro prev, next;
804	sv = SvRV (sv); \	1056	};
805	\
806	if (SvTYPE (sv) == SVt_PVHV) \
807	{ \
808	HE he = hv_fetch_ent ((HV )sv, ucoro_state_sv, 0, ucoro_state_hash); \
809	\
810	if (!he) \
811	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
812	\
813	(sv) = SvRV (HeVAL(he)); \
814	} \
815	\
816	/* must also be changed inside Coro::Cont::yield */ \
817	if (!SvOBJECT (sv) \|\| SvSTASH (sv) != coro_state_stash) \
818	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
819	\
820	} while(0)
821		1057
822	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1058	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1059	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1060
		1061	/ high level stuff ******************************************************/
		1062
		1063	static int
		1064	coro_state_destroy (pTHX_ struct coro *coro)
		1065	{
		1066	if (coro->flags & CF_DESTROYED)
		1067	return 0;
		1068
		1069	coro->flags \|= CF_DESTROYED;
		1070
		1071	if (coro->flags & CF_READY)
		1072	{
		1073	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1074	/* alternative: look through all ready queues and remove the coro */
		1075	LOCK;
		1076	--coro_nready;
		1077	UNLOCK;
		1078	}
		1079	else
		1080	coro->flags \|= CF_READY; /* make sure it is NOT put into the readyqueue */
		1081
		1082	if (coro->mainstack && coro->mainstack != main_mainstack)
		1083	{
		1084	struct coro temp;
		1085
		1086	if (coro->flags & CF_RUNNING)
		1087	croak ("FATAL: tried to destroy currently running coroutine");
		1088
		1089	Zero (&temp, 1, struct coro);
		1090	temp.save = CORO_SAVE_ALL;
		1091
		1092	save_perl (aTHX_ &temp);
		1093	load_perl (aTHX_ coro);
		1094
		1095	coro_destroy_stacks (aTHX);
		1096
		1097	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1098
		1099	coro->mainstack = 0;
		1100	}
		1101
		1102	cctx_destroy (coro->cctx);
		1103	SvREFCNT_dec (coro->args);
		1104
		1105	if (coro->next) coro->next->prev = coro->prev;
		1106	if (coro->prev) coro->prev->next = coro->next;
		1107	if (coro == coro_first) coro_first = coro->next;
		1108
		1109	return 1;
		1110	}
		1111
		1112	static int
		1113	coro_state_free (pTHX_ SV sv, MAGIC mg)
		1114	{
		1115	struct coro coro = (struct coro )mg->mg_ptr;
		1116	mg->mg_ptr = 0;
		1117
		1118	coro->hv = 0;
		1119
		1120	if (--coro->refcnt < 0)
		1121	{
		1122	coro_state_destroy (aTHX_ coro);
		1123	Safefree (coro);
		1124	}
		1125
		1126	return 0;
		1127	}
		1128
		1129	static int
		1130	coro_state_dup (pTHX_ MAGIC mg, CLONE_PARAMS params)
		1131	{
		1132	struct coro coro = (struct coro )mg->mg_ptr;
		1133
		1134	++coro->refcnt;
		1135
		1136	return 0;
		1137	}
		1138
		1139	static MGVTBL coro_state_vtbl = {
		1140	0, 0, 0, 0,
		1141	coro_state_free,
		1142	0,
		1143	#ifdef MGf_DUP
		1144	coro_state_dup,
		1145	#else
		1146	# define MGf_DUP 0
		1147	#endif
		1148	};
823		1149
824	static void	1150	static void
		1151	prepare_transfer (pTHX_ struct transfer_args ta, SV prev_sv, SV *next_sv)
		1152	{
		1153	ta->prev = SvSTATE (prev_sv);
		1154	ta->next = SvSTATE (next_sv);
		1155	TRANSFER_CHECK (*ta);
		1156	}
		1157
		1158	static void
825	api_transfer(pTHX_ SV prev, SV next, int flags)	1159	api_transfer (SV prev_sv, SV next_sv)
826	{	1160	{
827	SV_CORO (prev, "Coro::transfer");	1161	dTHX;
828	SV_CORO (next, "Coro::transfer");	1162	struct transfer_args ta;
829		1163
830	transfer(aTHX_ SvSTATE(prev), SvSTATE(next), flags);	1164	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1165	TRANSFER (ta);
		1166	}
		1167
		1168	static int
		1169	api_save (SV *coro_sv, int new_save)
		1170	{
		1171	dTHX;
		1172	struct coro *coro = SvSTATE (coro_sv);
		1173	int old_save = coro->save;
		1174
		1175	if (new_save >= 0)
		1176	coro->save = new_save;
		1177
		1178	return old_save;
831	}	1179	}
832		1180
833	/ Coro ******************************************************************/	1181	/ Coro ******************************************************************/
834		1182
835	#define PRIO_MAX 3
836	#define PRIO_HIGH 1
837	#define PRIO_NORMAL 0
838	#define PRIO_LOW -1
839	#define PRIO_IDLE -3
840	#define PRIO_MIN -4
841
842	/* for Coro.pm */
843	static GV coro_current, coro_idle;
844	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
845	static int coro_nready;
846
847	static void	1183	static void
848	coro_enq (SV *sv)	1184	coro_enq (pTHX_ SV *coro_sv)
849	{	1185	{
850	if (SvTYPE (sv) == SVt_PVHV)
851	{
852	SV *xprio = hv_fetch ((HV )sv, "prio", 4, 0);
853	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
854
855	prio = prio > PRIO_MAX ? PRIO_MAX
856	: prio < PRIO_MIN ? PRIO_MIN
857	: prio;
858
859	av_push (coro_ready [prio - PRIO_MIN], sv);	1186	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
860	coro_nready++;
861
862	return;
863	}
864
865	croak ("Coro::ready tried to enqueue something that is not a coroutine");
866	}	1187	}
867		1188
868	static SV *	1189	static SV *
869	coro_deq (int min_prio)	1190	coro_deq (pTHX_ int min_prio)
870	{	1191	{
871	int prio = PRIO_MAX - PRIO_MIN;	1192	int prio = PRIO_MAX - PRIO_MIN;
872		1193
873	min_prio -= PRIO_MIN;	1194	min_prio -= PRIO_MIN;
874	if (min_prio < 0)	1195	if (min_prio < 0)
875	min_prio = 0;	1196	min_prio = 0;
876		1197
877	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1198	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
878	if (av_len (coro_ready[prio]) >= 0)	1199	if (AvFILLp (coro_ready [prio]) >= 0)
879	{
880	coro_nready--;
881	return av_shift (coro_ready[prio]);	1200	return av_shift (coro_ready [prio]);
882	}
883		1201
884	return 0;	1202	return 0;
885	}	1203	}
886		1204
		1205	static int
		1206	api_ready (SV *coro_sv)
		1207	{
		1208	dTHX;
		1209	struct coro *coro;
		1210
		1211	if (SvROK (coro_sv))
		1212	coro_sv = SvRV (coro_sv);
		1213
		1214	coro = SvSTATE (coro_sv);
		1215
		1216	if (coro->flags & CF_READY)
		1217	return 0;
		1218
		1219	coro->flags \|= CF_READY;
		1220
		1221	LOCK;
		1222	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1223	++coro_nready;
		1224	UNLOCK;
		1225
		1226	return 1;
		1227	}
		1228
		1229	static int
		1230	api_is_ready (SV *coro_sv)
		1231	{
		1232	dTHX;
		1233	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1234	}
		1235
887	static void	1236	static void
888	api_ready (SV *coro)	1237	prepare_schedule (pTHX_ struct transfer_args *ta)
889	{	1238	{
890	if (SvROK (coro))	1239	SV prev_sv, next_sv;
891	coro = SvRV (coro);	1240
		1241	for (;;)
		1242	{
		1243	LOCK;
		1244	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1245
		1246	/* nothing to schedule: call the idle handler */
		1247	if (!next_sv)
		1248	{
		1249	dSP;
		1250	UNLOCK;
		1251
		1252	ENTER;
		1253	SAVETMPS;
		1254
		1255	PUSHMARK (SP);
		1256	PUTBACK;
		1257	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1258
		1259	FREETMPS;
		1260	LEAVE;
		1261	continue;
		1262	}
		1263
		1264	ta->next = SvSTATE (next_sv);
		1265
		1266	/* cannot transfer to destroyed coros, skip and look for next */
		1267	if (ta->next->flags & CF_DESTROYED)
		1268	{
		1269	UNLOCK;
		1270	SvREFCNT_dec (next_sv);
		1271	/* coro_nready is already taken care of by destroy */
		1272	continue;
		1273	}
		1274
		1275	--coro_nready;
		1276	UNLOCK;
		1277	break;
		1278	}
		1279
		1280	/* free this only after the transfer */
		1281	prev_sv = SvRV (coro_current);
		1282	ta->prev = SvSTATE (prev_sv);
		1283	TRANSFER_CHECK (*ta);
		1284	assert (ta->next->flags & CF_READY);
		1285	ta->next->flags &= ~CF_READY;
		1286	SvRV_set (coro_current, next_sv);
892		1287
893	LOCK;	1288	LOCK;
894	coro_enq (SvREFCNT_inc (coro));	1289	free_coro_mortal (aTHX);
		1290	coro_mortal = prev_sv;
895	UNLOCK;	1291	UNLOCK;
		1292	}
		1293
		1294	static void
		1295	prepare_cede (pTHX_ struct transfer_args *ta)
		1296	{
		1297	api_ready (coro_current);
		1298	prepare_schedule (aTHX_ ta);
		1299	}
		1300
		1301	static int
		1302	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1303	{
		1304	if (coro_nready)
		1305	{
		1306	SV *prev = SvRV (coro_current);
		1307	prepare_schedule (aTHX_ ta);
		1308	api_ready (prev);
		1309	return 1;
		1310	}
		1311	else
		1312	return 0;
896	}	1313	}
897		1314
898	static void	1315	static void
899	api_schedule (void)	1316	api_schedule (void)
900	{	1317	{
901	SV prev, next;	1318	dTHX;
		1319	struct transfer_args ta;
902		1320
903	LOCK;	1321	prepare_schedule (aTHX_ &ta);
		1322	TRANSFER (ta);
		1323	}
904		1324
905	prev = SvRV (GvSV (coro_current));	1325	static int
906	next = coro_deq (PRIO_MIN);	1326	api_cede (void)
		1327	{
		1328	dTHX;
		1329	struct transfer_args ta;
907		1330
908	if (!next)	1331	prepare_cede (aTHX_ &ta);
909	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
910		1332
911	/* free this only after the transfer */	1333	if (ta.prev != ta.next)
912	coro_mortal = prev;	1334	{
913	SV_CORO (prev, "Coro::schedule");	1335	TRANSFER (ta);
		1336	return 1;
		1337	}
		1338	else
		1339	return 0;
		1340	}
914		1341
915	SvRV (GvSV (coro_current)) = next;	1342	static int
		1343	api_cede_notself (void)
		1344	{
		1345	dTHX;
		1346	struct transfer_args ta;
916		1347
917	SV_CORO (next, "Coro::schedule");	1348	if (prepare_cede_notself (aTHX_ &ta))
918		1349	{
919	UNLOCK;	1350	TRANSFER (ta);
920		1351	return 1;
921	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),	1352	}
922	TRANSFER_SAVE_ALL \| TRANSFER_LAZY_STACK);	1353	else
		1354	return 0;
923	}	1355	}
924		1356
925	static void	1357	static void
926	api_cede (void)	1358	api_trace (SV *coro_sv, int flags)
927	{	1359	{
928	LOCK;	1360	dTHX;
929	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));	1361	struct coro *coro = SvSTATE (coro_sv);
930	UNLOCK;
931		1362
932	api_schedule ();	1363	if (flags & CC_TRACE)
933	}	1364	{
		1365	if (!coro->cctx)
		1366	coro->cctx = cctx_new ();
		1367	else if (!(coro->cctx->flags & CC_TRACE))
		1368	croak ("cannot enable tracing on coroutine with custom stack");
934		1369
		1370	coro->cctx->flags \|= CC_NOREUSE \| (flags & (CC_TRACE \| CC_TRACE_ALL));
		1371	}
		1372	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1373	{
		1374	coro->cctx->flags &= ~(CC_TRACE \| CC_TRACE_ALL);
		1375
		1376	if (coro->flags & CF_RUNNING)
		1377	PL_runops = RUNOPS_DEFAULT;
		1378	else
		1379	coro->runops = RUNOPS_DEFAULT;
		1380	}
		1381	}
		1382
935	MODULE = Coro::State PACKAGE = Coro::State	1383	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
936		1384
937	PROTOTYPES: ENABLE	1385	PROTOTYPES: DISABLE
938		1386
939	BOOT:	1387	BOOT:
940	{ /* {} necessary for stoopid perl-5.6.x */	1388	{
941	#ifdef USE_ITHREADS	1389	#ifdef USE_ITHREADS
942	MUTEX_INIT (&coro_mutex);	1390	MUTEX_INIT (&coro_mutex);
943	#endif	1391	#endif
		1392	BOOT_PAGESIZE;
944		1393
945	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
946	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
947	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1394	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
948		1395
		1396	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
		1397	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
		1398	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1399	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
		1400
949	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1401	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
950	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1402	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
951	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1403	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1404	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
		1405	newCONSTSUB (coro_state_stash, "SAVE_DEFFH", newSViv (CORO_SAVE_DEFFH));
952	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1406	newCONSTSUB (coro_state_stash, "SAVE_DEF", newSViv (CORO_SAVE_DEF));
		1407	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
953		1408
954	main_mainstack = PL_mainstack;	1409	main_mainstack = PL_mainstack;
		1410	main_top_env = PL_top_env;
		1411
		1412	while (main_top_env->je_prev)
		1413	main_top_env = main_top_env->je_prev;
955		1414
956	coroapi.ver = CORO_API_VERSION;	1415	coroapi.ver = CORO_API_VERSION;
957	coroapi.transfer = api_transfer;	1416	coroapi.transfer = api_transfer;
958	}
959		1417
960	Coro::State	1418	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
961	_newprocess(args)	1419	}
962	SV * args	1420
963	PROTOTYPE: $	1421	SV *
		1422	new (char *klass, ...)
964	CODE:	1423	CODE:
965	Coro__State coro;	1424	{
		1425	struct coro *coro;
		1426	HV *hv;
		1427	int i;
966		1428
967	if (!SvROK (args) \|\| SvTYPE (SvRV (args)) != SVt_PVAV)
968	croak ("Coro::State::_newprocess expects an arrayref");
969
970	Newz (0, coro, 1, struct coro);	1429	Newz (0, coro, 1, struct coro);
		1430	coro->args = newAV ();
		1431	coro->save = CORO_SAVE_DEF;
		1432	coro->flags = CF_NEW;
971		1433
972	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1434	if (coro_first) coro_first->prev = coro;
973	coro->mainstack = 0; /* actual work is done inside transfer */	1435	coro->next = coro_first;
974	coro->stack = 0;	1436	coro_first = coro;
975		1437
976	/* same as JMPENV_BOOTSTRAP */	1438	coro->hv = hv = newHV ();
977	/* we might be able to recycle start_env, but safe is safe */	1439	sv_magicext ((SV )hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char )coro, 0)->mg_flags \|= MGf_DUP;
978	//Zero(&coro->start_env, 1, JMPENV);	1440	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
979	coro->start_env.je_ret = -1;
980	coro->start_env.je_mustcatch = TRUE;
981		1441
982	RETVAL = coro;	1442	for (i = 1; i < items; i++)
		1443	av_push (coro->args, newSVsv (ST (i)));
		1444	}
983	OUTPUT:	1445	OUTPUT:
984	RETVAL	1446	RETVAL
985		1447
		1448	int
		1449	save (SV *coro, int new_save = -1)
		1450	CODE:
		1451	RETVAL = api_save (coro, new_save);
		1452	OUTPUT:
		1453	RETVAL
		1454
		1455	int
		1456	save_also (SV *coro_sv, int save_also)
		1457	CODE:
		1458	{
		1459	struct coro *coro = SvSTATE (coro_sv);
		1460	RETVAL = coro->save;
		1461	coro->save \|= save_also;
		1462	}
		1463	OUTPUT:
		1464	RETVAL
		1465
		1466	# these not obviously related functions are all rolled into the same xs
		1467	# function to increase chances that they all will call transfer with the same
		1468	# stack offset
986	void	1469	void
987	transfer(prev, next, flags)	1470	_set_stacklevel (...)
988	SV *prev	1471	ALIAS:
989	SV *next	1472	Coro::State::transfer = 1
990	int flags	1473	Coro::schedule = 2
991	PROTOTYPE: @	1474	Coro::cede = 3
		1475	Coro::cede_notself = 4
992	CODE:	1476	CODE:
993	PUTBACK;	1477	{
994	SV_CORO (next, "Coro::transfer");	1478	struct transfer_args ta;
995	SV_CORO (prev, "Coro::transfer");	1479
996	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1480	switch (ix)
997	SPAGAIN;	1481	{
		1482	case 0:
		1483	ta.prev = (struct coro )INT2PTR (coro_cctx , SvIV (ST (0)));
		1484	ta.next = 0;
		1485	break;
		1486
		1487	case 1:
		1488	if (items != 2)
		1489	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1490
		1491	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1492	break;
		1493
		1494	case 2:
		1495	prepare_schedule (aTHX_ &ta);
		1496	break;
		1497
		1498	case 3:
		1499	prepare_cede (aTHX_ &ta);
		1500	break;
		1501
		1502	case 4:
		1503	if (!prepare_cede_notself (aTHX_ &ta))
		1504	XSRETURN_EMPTY;
		1505
		1506	break;
		1507	}
		1508
		1509	BARRIER;
		1510	TRANSFER (ta);
		1511
		1512	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1513	XSRETURN_YES;
		1514	}
		1515
		1516	bool
		1517	_destroy (SV *coro_sv)
		1518	CODE:
		1519	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1520	OUTPUT:
		1521	RETVAL
998		1522
999	void	1523	void
1000	DESTROY(coro)
1001	Coro::State coro
1002	CODE:
1003
1004	if (coro->mainstack && coro->mainstack != main_mainstack)
1005	{
1006	struct coro temp;
1007
1008	PUTBACK;
1009	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
1010	LOAD(aTHX_ coro);
1011	SPAGAIN;
1012
1013	destroy_stacks (aTHX);
1014
1015	LOAD((&temp)); /* this will get rid of defsv etc.. */
1016	SPAGAIN;
1017
1018	coro->mainstack = 0;
1019	}
1020
1021	deallocate_stack (coro);
1022	SvREFCNT_dec (coro->args);
1023	Safefree (coro);
1024
1025	void
1026	_exit(code)	1524	_exit (code)
1027	int code	1525	int code
1028	PROTOTYPE: $	1526	PROTOTYPE: $
1029	CODE:	1527	CODE:
1030	_exit (code);	1528	_exit (code);
1031		1529
1032	MODULE = Coro::State PACKAGE = Coro::Cont	1530	int
		1531	cctx_stacksize (int new_stacksize = 0)
		1532	CODE:
		1533	RETVAL = coro_stacksize;
		1534	if (new_stacksize)
		1535	coro_stacksize = new_stacksize;
		1536	OUTPUT:
		1537	RETVAL
1033		1538
1034	# this is slightly dirty (should expose a c-level api)	1539	int
		1540	cctx_count ()
		1541	CODE:
		1542	RETVAL = cctx_count;
		1543	OUTPUT:
		1544	RETVAL
		1545
		1546	int
		1547	cctx_idle ()
		1548	CODE:
		1549	RETVAL = cctx_idle;
		1550	OUTPUT:
		1551	RETVAL
1035		1552
1036	void	1553	void
1037	yield(...)	1554	list ()
1038	PROTOTYPE: @	1555	PPCODE:
		1556	{
		1557	struct coro *coro;
		1558	for (coro = coro_first; coro; coro = coro->next)
		1559	if (coro->hv)
		1560	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1561	}
		1562
		1563	void
		1564	call (Coro::State coro, SV *coderef)
		1565	ALIAS:
		1566	eval = 1
		1567	CODE:
		1568	{
		1569	if (coro->mainstack)
		1570	{
		1571	struct coro temp;
		1572	Zero (&temp, 1, struct coro);
		1573	temp.save = CORO_SAVE_ALL;
		1574
		1575	if (!(coro->flags & CF_RUNNING))
		1576	{
		1577	save_perl (aTHX_ &temp);
		1578	load_perl (aTHX_ coro);
		1579	}
		1580
		1581	{
		1582	dSP;
		1583	ENTER;
		1584	SAVETMPS;
		1585	PUSHMARK (SP);
		1586	PUTBACK;
		1587	if (ix)
		1588	eval_sv (coderef, 0);
		1589	else
		1590	call_sv (coderef, G_KEEPERR \| G_EVAL \| G_VOID \| G_DISCARD);
		1591	SPAGAIN;
		1592	FREETMPS;
		1593	LEAVE;
		1594	PUTBACK;
		1595	}
		1596
		1597	if (!(coro->flags & CF_RUNNING))
		1598	{
		1599	save_perl (aTHX_ coro);
		1600	load_perl (aTHX_ &temp);
		1601	}
		1602	}
		1603	}
		1604
		1605	SV *
		1606	is_ready (Coro::State coro)
		1607	PROTOTYPE: $
		1608	ALIAS:
		1609	is_ready = CF_READY
		1610	is_running = CF_RUNNING
		1611	is_new = CF_NEW
		1612	is_destroyed = CF_DESTROYED
		1613	CODE:
		1614	RETVAL = boolSV (coro->flags & ix);
		1615	OUTPUT:
		1616	RETVAL
		1617
		1618	void
		1619	api_trace (SV *coro, int flags = CC_TRACE \| CC_TRACE_SUB)
		1620
		1621	SV *
		1622	has_stack (Coro::State coro)
		1623	PROTOTYPE: $
		1624	CODE:
		1625	RETVAL = boolSV (!!coro->cctx);
		1626	OUTPUT:
		1627	RETVAL
		1628
		1629	int
		1630	is_traced (Coro::State coro)
		1631	PROTOTYPE: $
		1632	CODE:
		1633	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1634	OUTPUT:
		1635	RETVAL
		1636
		1637	IV
		1638	rss (Coro::State coro)
		1639	PROTOTYPE: $
		1640	ALIAS:
		1641	usecount = 1
1039	CODE:	1642	CODE:
1040	static SV *returnstk;	1643	switch (ix)
1041	SV *sv;	1644	{
1042	AV *defav = GvAV (PL_defgv);	1645	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1043	struct coro prev, next;	1646	case 1: RETVAL = coro->usecount; break;
		1647	}
		1648	OUTPUT:
		1649	RETVAL
1044		1650
1045	if (!returnstk)
1046	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1047
1048	/* set up @_ -- ugly */
1049	av_clear (defav);
1050	av_fill (defav, items - 1);
1051	while (items--)
1052	av_store (defav, items, SvREFCNT_inc (ST(items)));
1053
1054	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
1055	sv = av_pop ((AV *)SvRV (returnstk));
1056	prev = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 0, 0)));
1057	next = (struct coro )SvIV ((SV)SvRV (av_fetch ((AV )SvRV (sv), 1, 0)));
1058	SvREFCNT_dec (sv);
1059
1060	transfer(aTHX_ prev, next, 0);
1061		1651
1062	MODULE = Coro::State PACKAGE = Coro	1652	MODULE = Coro::State PACKAGE = Coro
1063		1653
1064	# this is slightly dirty (should expose a c-level api)
1065
1066	BOOT:	1654	BOOT:
1067	{	1655	{
1068	int i;	1656	int i;
		1657
		1658	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1659	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1660	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1661
		1662	coro_current = get_sv ("Coro::current", FALSE);
		1663	SvREADONLY_on (coro_current);
		1664
1069	HV *stash = gv_stashpv ("Coro", TRUE);	1665	coro_stash = gv_stashpv ("Coro", TRUE);
1070		1666
1071	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1667	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1072	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1668	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1073	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1669	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1074	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1670	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1075	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1671	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1076	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1672	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1077
1078	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1079	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1080		1673
1081	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1674	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1082	coro_ready[i] = newAV ();	1675	coro_ready[i] = newAV ();
1083		1676
1084	{	1677	{
1085	SV *sv = perl_get_sv("Coro::API", 1);	1678	SV *sv = perl_get_sv("Coro::API", 1);
1086		1679
1087	coroapi.schedule = api_schedule;	1680	coroapi.schedule = api_schedule;
		1681	coroapi.save = api_save;
1088	coroapi.cede = api_cede;	1682	coroapi.cede = api_cede;
		1683	coroapi.cede_notself = api_cede_notself;
1089	coroapi.ready = api_ready;	1684	coroapi.ready = api_ready;
		1685	coroapi.is_ready = api_is_ready;
1090	coroapi.nready = &coro_nready;	1686	coroapi.nready = &coro_nready;
1091	coroapi.current = coro_current;	1687	coroapi.current = coro_current;
1092		1688
1093	GCoroAPI = &coroapi;	1689	GCoroAPI = &coroapi;
1094	sv_setiv(sv, (IV)&coroapi);	1690	sv_setiv (sv, (IV)&coroapi);
1095	SvREADONLY_on(sv);	1691	SvREADONLY_on (sv);
1096	}	1692	}
1097	}	1693	}
1098		1694
1099	#if !PERL_MICRO
1100
1101	void	1695	void
1102	ready(self)	1696	_set_current (SV *current)
1103	SV * self
1104	PROTOTYPE: $	1697	PROTOTYPE: $
1105	CODE:	1698	CODE:
1106	api_ready (self);	1699	SvREFCNT_dec (SvRV (coro_current));
1107		1700	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1108	#endif
1109		1701
1110	int	1702	int
		1703	prio (Coro::State coro, int newprio = 0)
		1704	ALIAS:
		1705	nice = 1
		1706	CODE:
		1707	{
		1708	RETVAL = coro->prio;
		1709
		1710	if (items > 1)
		1711	{
		1712	if (ix)
		1713	newprio = coro->prio - newprio;
		1714
		1715	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1716	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1717
		1718	coro->prio = newprio;
		1719	}
		1720	}
		1721	OUTPUT:
		1722	RETVAL
		1723
		1724	SV *
		1725	ready (SV *self)
		1726	PROTOTYPE: $
		1727	CODE:
		1728	RETVAL = boolSV (api_ready (self));
		1729	OUTPUT:
		1730	RETVAL
		1731
		1732	int
1111	nready(...)	1733	nready (...)
1112	PROTOTYPE:	1734	PROTOTYPE:
1113	CODE:	1735	CODE:
1114	RETVAL = coro_nready;	1736	RETVAL = coro_nready;
1115	OUTPUT:	1737	OUTPUT:
1116	RETVAL	1738	RETVAL
1117		1739
		1740	# for async_pool speedup
1118	void	1741	void
1119	schedule(...)	1742	_pool_1 (SV *cb)
1120	PROTOTYPE:
1121	CODE:	1743	CODE:
1122	api_schedule ();	1744	{
		1745	int i, len;
		1746	HV hv = (HV )SvRV (coro_current);
		1747	AV *defav = GvAV (PL_defgv);
		1748	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1749	AV *invoke_av;
		1750
		1751	if (!invoke)
		1752	croak ("\3terminate\2\n");
		1753
		1754	hv_store (hv, "desc", sizeof ("desc") - 1,
		1755	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1756
		1757	invoke_av = (AV *)SvRV (invoke);
		1758	len = av_len (invoke_av);
		1759
		1760	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1761
		1762	if (len > 0)
		1763	{
		1764	av_fill (defav, len - 1);
		1765	for (i = 0; i < len; ++i)
		1766	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1767	}
		1768
		1769	SvREFCNT_dec (invoke);
		1770	}
1123		1771
1124	void	1772	void
1125	cede(...)	1773	_pool_2 (SV *cb)
1126	PROTOTYPE:
1127	CODE:	1774	CODE:
1128	api_cede ();	1775	{
		1776	struct coro *coro = SvSTATE (coro_current);
1129		1777
		1778	sv_setsv (cb, &PL_sv_undef);
		1779
		1780	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1781	\|\| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1782	croak ("\3terminate\2\n");
		1783
		1784	av_clear (GvAV (PL_defgv));
		1785	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1786	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1787
		1788	coro->save = CORO_SAVE_DEF;
		1789	coro->prio = 0;
		1790
		1791	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1792	api_trace (coro_current, 0);
		1793
		1794	av_push (av_async_pool, newSVsv (coro_current));
		1795	}
		1796
		1797
		1798	MODULE = Coro::State PACKAGE = Coro::AIO
		1799
		1800	SV *
		1801	_get_state ()
		1802	CODE:
		1803	{
		1804	struct io_state *data;
		1805
		1806	RETVAL = newSV (sizeof (struct io_state));
		1807	data = (struct io_state *)SvPVX (RETVAL);
		1808	SvCUR_set (RETVAL, sizeof (struct io_state));
		1809	SvPOK_only (RETVAL);
		1810
		1811	data->errorno = errno;
		1812	data->laststype = PL_laststype;
		1813	data->laststatval = PL_laststatval;
		1814	data->statcache = PL_statcache;
		1815	}
		1816	OUTPUT:
		1817	RETVAL
		1818
		1819	void
		1820	_set_state (char *data_)
		1821	PROTOTYPE: $
		1822	CODE:
		1823	{
		1824	struct io_state data = (void )data_;
		1825
		1826	errno = data->errorno;
		1827	PL_laststype = data->laststype;
		1828	PL_laststatval = data->laststatval;
		1829	PL_statcache = data->statcache;
		1830	}
		1831

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Comparing Coro/Coro/State.xs (file contents): Revision 1.55 by pcg, Thu Apr 1 02:29:05 2004 UTC vs. Revision 1.177 by root, Tue Oct 2 10:24:44 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.55 by pcg, Thu Apr 1 02:29:05 2004 UTC vs.
Revision 1.177 by root, Tue Oct 2 10:24:44 2007 UTC