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

Comparing Coro/Coro/State.xs (file contents):
Revision 1.66 by root, Mon Dec 12 19:43:41 2005 UTC vs.
Revision 1.185 by root, Thu Oct 4 19:35:08 2007 UTC

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

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Comparing Coro/Coro/State.xs (file contents): Revision 1.66 by root, Mon Dec 12 19:43:41 2005 UTC vs. Revision 1.185 by root, Thu Oct 4 19:35:08 2007 UTC

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Comparing Coro/Coro/State.xs (file contents):
Revision 1.66 by root, Mon Dec 12 19:43:41 2005 UTC vs.
Revision 1.185 by root, Thu Oct 4 19:35:08 2007 UTC