ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.63 by root, Mon Mar 21 14:35:22 2005 UTC vs.
Revision 1.187 by root, Fri Oct 5 20:31:18 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 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)
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	COP *curcop;
134	JMPENV *top_env;
135		187
136	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
137	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 */
138	};	218	};
139		219
140	typedef struct coro *Coro__State;	220	typedef struct coro *Coro__State;
141	typedef struct coro *Coro__State_or_hashref;	221	typedef struct coro *Coro__State_or_hashref;
142		222
143	/* mostly copied from op.c:cv_clone2 */	223	/** Coro ********************************************************************/
144	STATIC AV *	224
145	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)
146	{	242	{
147	AV *av;	243	AV *padlist = CvPADLIST (cv);
148	I32 ix;
149	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
150	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
151	SV **pname = AvARRAY (protopad_name);
152	SV **ppad = AvARRAY (protopad);
153	I32 fname = AvFILLp (protopad_name);
154	I32 fpad = AvFILLp (protopad);
155	AV *newpadlist, *newpad_name, *newpad;	244	AV *newpadlist, *newpad;
156	SV **npad;
157
158	newpad_name = newAV ();
159	for (ix = fname; ix >= 0; ix--)
160	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
161
162	newpad = newAV ();
163	av_fill (newpad, AvFILLp (protopad));
164	npad = AvARRAY (newpad);
165		245
166	newpadlist = newAV ();	246	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	247	AvREAL_off (newpadlist);
168	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)));
169	av_store (newpadlist, 1, (SV *) newpad);	257	av_store (newpadlist, 1, (SV *)newpad);
170
171	av = newAV (); /* will be @_ */
172	av_extend (av, 0);
173	av_store (newpad, 0, (SV *) av);
174	AvFLAGS (av) = AVf_REIFY;
175
176	for (ix = fpad; ix > 0; ix--)
177	{
178	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
179
180	if (namesv && namesv != &PL_sv_undef)
181	{
182	char *name = SvPVX (namesv); /* XXX */
183
184	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
185	{ /* lexical from outside? */
186	npad[ix] = SvREFCNT_inc (ppad[ix]);
187	}
188	else
189	{ /* our own lexical */
190	SV *sv;
191	if (*name == '&')
192	sv = SvREFCNT_inc (ppad[ix]);
193	else if (*name == '@')
194	sv = (SV *) newAV ();
195	else if (*name == '%')
196	sv = (SV *) newHV ();
197	else
198	sv = NEWSV (0, 0);
199
200	#ifdef SvPADBUSY
201	if (!SvPADBUSY (sv))
202	#endif
203	SvPADMY_on (sv);
204
205	npad[ix] = sv;
206	}
207	}
208	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
209	{
210	npad[ix] = SvREFCNT_inc (ppad[ix]);
211	}
212	else
213	{
214	SV *sv = NEWSV (0, 0);
215	SvPADTMP_on (sv);
216	npad[ix] = sv;
217	}
218	}
219
220	#if 0 /* return -ENOTUNDERSTOOD */
221	/* Now that vars are all in place, clone nested closures. */
222
223	for (ix = fpad; ix > 0; ix--) {
224	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
225	if (namesv
226	&& namesv != &PL_sv_undef
227	&& !(SvFLAGS(namesv) & SVf_FAKE)
228	&& *SvPVX(namesv) == '&'
229	&& CvCLONE(ppad[ix]))
230	{
231	CV *kid = cv_clone((CV*)ppad[ix]);
232	SvREFCNT_dec(ppad[ix]);
233	CvCLONE_on(kid);
234	SvPADMY_on(kid);
235	npad[ix] = (SV*)kid;
236	}
237	}
238	#endif
239		258
240	return newpadlist;	259	return newpadlist;
241	}	260	}
242		261
243	STATIC void	262	static void
244	free_padlist (pTHX_ AV *padlist)	263	free_padlist (pTHX_ AV *padlist)
245	{	264	{
246	/* may be during global destruction */	265	/* may be during global destruction */
247	if (SvREFCNT (padlist))	266	if (SvREFCNT (padlist))
248	{	267	{
…		…
262		281
263	SvREFCNT_dec ((SV*)padlist);	282	SvREFCNT_dec ((SV*)padlist);
264	}	283	}
265	}	284	}
266		285
267	STATIC int	286	static int
268	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	287	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
269	{	288	{
270	AV *padlist;	289	AV *padlist;
271	AV *av = (AV *)mg->mg_obj;	290	AV *av = (AV *)mg->mg_obj;
272		291
273	/* casting is fun. */	292	/* casting is fun. */
274	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	293	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
275	free_padlist (aTHX_ padlist);	294	free_padlist (aTHX_ padlist);
276		295
277	SvREFCNT_dec (av);	296	SvREFCNT_dec (av);
		297
		298	return 0;
278	}	299	}
279		300
280	#define PERL_MAGIC_coro PERL_MAGIC_ext	301	#define PERL_MAGIC_coro PERL_MAGIC_ext
281		302
282	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	303	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
283		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
284	/* the next two functions merely cache the padlists */	338	/* the next two functions merely cache the padlists */
285	STATIC void	339	static void
286	get_padlist (pTHX_ CV *cv)	340	get_padlist (pTHX_ CV *cv)
287	{	341	{
288	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	342	MAGIC *mg = CORO_MAGIC (cv);
		343	AV *av;
289		344
290	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	345	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
291	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	346	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
292	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
293	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	356	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		357	#endif
		358	}
294	}	359	}
295		360
296	STATIC void	361	static void
297	put_padlist (pTHX_ CV *cv)	362	put_padlist (pTHX_ CV *cv)
298	{	363	{
299	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	364	MAGIC *mg = CORO_MAGIC (cv);
		365	AV *av;
300		366
301	if (!mg)	367	if (!mg)
302	{	368	{
303	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	369	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
304	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	370	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
305	mg->mg_virtual = &vtbl_coro;	371	mg->mg_virtual = &vtbl_coro;
306	mg->mg_obj = (SV *)newAV ();	372	mg->mg_obj = (SV *)newAV ();
307	}	373	}
308		374
309	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	375	av = (AV *)mg->mg_obj;
310	}
311		376
312	#define SB do {	377	if (AvFILLp (av) >= AvMAX (av))
313	#define SE } while (0)	378	av_extend (av, AvMAX (av) + 1);
314		379
315	#define LOAD(state) load_state(aTHX_ (state));	380	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
316	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	381	}
317		382
318	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	383	/** load & save, init *******************************************************/
319		384
320	static void	385	static void
321	load_state(pTHX_ Coro__State c)	386	load_perl (pTHX_ Coro__State c)
322	{	387	{
323	PL_dowarn = c->dowarn;	388	#define VAR(name,type) PL_ ## name = c->name;
324	PL_in_eval = c->in_eval;	389	# include "state.h"
		390	#undef VAR
325		391
326	PL_curstackinfo = c->curstackinfo;	392	GvSV (PL_defgv) = c->defsv;
327	PL_curstack = c->curstack;	393	GvAV (PL_defgv) = c->defav;
328	PL_mainstack = c->mainstack;	394	GvSV (PL_errgv) = c->errsv;
329	PL_stack_sp = c->stack_sp;	395	GvSV (irsgv) = c->irssv_sv;
330	PL_op = c->op;
331	PL_curpad = c->curpad;
332	PL_comppad = c->comppad;
333	PL_compcv = c->compcv;
334	PL_stack_base = c->stack_base;
335	PL_stack_max = c->stack_max;
336	PL_tmps_stack = c->tmps_stack;
337	PL_tmps_floor = c->tmps_floor;
338	PL_tmps_ix = c->tmps_ix;
339	PL_tmps_max = c->tmps_max;
340	PL_markstack = c->markstack;
341	PL_markstack_ptr = c->markstack_ptr;
342	PL_markstack_max = c->markstack_max;
343	PL_scopestack = c->scopestack;
344	PL_scopestack_ix = c->scopestack_ix;
345	PL_scopestack_max = c->scopestack_max;
346	PL_savestack = c->savestack;
347	PL_savestack_ix = c->savestack_ix;
348	PL_savestack_max = c->savestack_max;
349	PL_retstack = c->retstack;
350	PL_retstack_ix = c->retstack_ix;
351	PL_retstack_max = c->retstack_max;
352	PL_curcop = c->curcop;
353	PL_top_env = c->top_env;
354
355	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
356	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
357	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
358		396
359	{	397	{
360	dSP;	398	dSP;
361	CV *cv;	399	CV *cv;
362		400
363	/* now do the ugly restore mess */	401	/* now do the ugly restore mess */
364	while ((cv = (CV *)POPs))	402	while ((cv = (CV *)POPs))
365	{	403	{
366	AV *padlist = (AV *)POPs;
367
368	if (padlist)
369	{
370	put_padlist (aTHX_ cv); /* mark this padlist as available */	404	put_padlist (aTHX_ cv); /* mark this padlist as available */
371	CvPADLIST(cv) = padlist;	405	CvDEPTH (cv) = PTR2IV (POPs);
372	}	406	CvPADLIST (cv) = (AV *)POPs;
373
374	++CvDEPTH(cv);
375	}	407	}
376		408
377	PUTBACK;	409	PUTBACK;
378	}	410	}
379	}	411	}
380		412
381	static void	413	static void
382	save_state(pTHX_ Coro__State c, int flags)	414	save_perl (pTHX_ Coro__State c)
383	{	415	{
384	{	416	{
385	dSP;	417	dSP;
386	I32 cxix = cxstack_ix;	418	I32 cxix = cxstack_ix;
387	PERL_CONTEXT *ccstk = cxstack;	419	PERL_CONTEXT *ccstk = cxstack;
…		…
390	/*	422	/*
391	* 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
392	* (and reinitialize) all cv's in the whole callchain :(	424	* (and reinitialize) all cv's in the whole callchain :(
393	*/	425	*/
394		426
395	PUSHs (Nullsv);	427	XPUSHs (Nullsv);
396	/* this loop was inspired by pp_caller */	428	/* this loop was inspired by pp_caller */
397	for (;;)	429	for (;;)
398	{	430	{
399	while (cxix >= 0)	431	while (cxix >= 0)
400	{	432	{
401	PERL_CONTEXT *cx = &ccstk[cxix--];	433	PERL_CONTEXT *cx = &ccstk[cxix--];
402		434
403	if (CxTYPE(cx) == CXt_SUB)	435	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
404	{	436	{
405	CV *cv = cx->blk_sub.cv;	437	CV *cv = cx->blk_sub.cv;
		438
406	if (CvDEPTH(cv))	439	if (CvDEPTH (cv))
407	{	440	{
408	EXTEND (SP, CvDEPTH(cv)*2);	441	EXTEND (SP, 3);
409
410	while (--CvDEPTH(cv))
411	{
412	/* this tells the restore code to increment CvDEPTH */
413	PUSHs (Nullsv);
414	PUSHs ((SV *)cv);
415	}
416
417	PUSHs ((SV *)CvPADLIST(cv));	442	PUSHs ((SV *)CvPADLIST (cv));
		443	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
418	PUSHs ((SV *)cv);	444	PUSHs ((SV *)cv);
419		445
		446	CvDEPTH (cv) = 0;
420	get_padlist (aTHX_ cv); /* this is a monster */	447	get_padlist (aTHX_ cv);
421	}	448	}
422	}	449	}
423	#ifdef CXt_FORMAT
424	else if (CxTYPE(cx) == CXt_FORMAT)
425	{
426	/* I never used formats, so how should I know how these are implemented? */
427	/* my bold guess is as a simple, plain sub... */
428	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
429	}
430	#endif
431	}	450	}
432		451
433	if (top_si->si_type == PERLSI_MAIN)	452	if (top_si->si_type == PERLSI_MAIN)
434	break;	453	break;
435		454
436	top_si = top_si->si_prev;	455	top_si = top_si->si_prev;
437	ccstk = top_si->si_cxstack;	456	ccstk = top_si->si_cxstack;
438	cxix = top_si->si_cxix;	457	cxix = top_si->si_cxix;
439	}	458	}
440		459
441	PUTBACK;	460	PUTBACK;
442	}	461	}
443		462
444	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	463	c->defav = GvAV (PL_defgv);
445	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	464	c->defsv = DEFSV;
446	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	465	c->errsv = ERRSV;
		466	c->irssv_sv = GvSV (irsgv);
447		467
448	c->dowarn = PL_dowarn;	468	#define VAR(name,type)c->name = PL_ ## name;
449	c->in_eval = PL_in_eval;	469	# include "state.h"
450		470	#undef VAR
451	c->curstackinfo = PL_curstackinfo;
452	c->curstack = PL_curstack;
453	c->mainstack = PL_mainstack;
454	c->stack_sp = PL_stack_sp;
455	c->op = PL_op;
456	c->curpad = PL_curpad;
457	c->comppad = PL_comppad;
458	c->compcv = PL_compcv;
459	c->stack_base = PL_stack_base;
460	c->stack_max = PL_stack_max;
461	c->tmps_stack = PL_tmps_stack;
462	c->tmps_floor = PL_tmps_floor;
463	c->tmps_ix = PL_tmps_ix;
464	c->tmps_max = PL_tmps_max;
465	c->markstack = PL_markstack;
466	c->markstack_ptr = PL_markstack_ptr;
467	c->markstack_max = PL_markstack_max;
468	c->scopestack = PL_scopestack;
469	c->scopestack_ix = PL_scopestack_ix;
470	c->scopestack_max = PL_scopestack_max;
471	c->savestack = PL_savestack;
472	c->savestack_ix = PL_savestack_ix;
473	c->savestack_max = PL_savestack_max;
474	c->retstack = PL_retstack;
475	c->retstack_ix = PL_retstack_ix;
476	c->retstack_max = PL_retstack_max;
477	c->curcop = PL_curcop;
478	c->top_env = PL_top_env;
479	}	471	}
480		472
481	/*	473	/*
482	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
483	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
484	* on the (sometimes correct) assumption that coroutines do	476	* on the (sometimes correct) assumption that coroutines do
485	* not usually need a lot of stackspace.	477	* not usually need a lot of stackspace.
486	*/	478	*/
487	STATIC void	479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
		482	static void
488	coro_init_stacks (pTHX)	483	coro_init_stacks (pTHX)
489	{	484	{
490	LOCK;	485	PL_curstackinfo = new_stackinfo(64, 6);
491
492	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
493	PL_curstackinfo->si_type = PERLSI_MAIN;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
494	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
495	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
496		489
497	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
498	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
499	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
500		493
501	New(50,PL_tmps_stack,96,SV*);	494	New(50,PL_tmps_stack,64,SV*);
502	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
503	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
504	PL_tmps_max = 96;	497	PL_tmps_max = 64;
505		498
506	New(54,PL_markstack,16,I32);	499	New(54,PL_markstack,16,I32);
507	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
508	PL_markstack_max = PL_markstack + 16;	501	PL_markstack_max = PL_markstack + 16;
509		502
…		…
513		506
514	New(54,PL_scopestack,16,I32);	507	New(54,PL_scopestack,16,I32);
515	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
516	PL_scopestack_max = 16;	509	PL_scopestack_max = 16;
517		510
518	New(54,PL_savestack,96,ANY);	511	New(54,PL_savestack,64,ANY);
519	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
520	PL_savestack_max = 96;	513	PL_savestack_max = 64;
521		514
		515	#if !PERL_VERSION_ATLEAST (5,9,0)
522	New(54,PL_retstack,8,OP*);	516	New(54,PL_retstack,4,OP*);
523	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
524	PL_retstack_max = 8;	518	PL_retstack_max = 4;
525		519	#endif
526	UNLOCK;
527	}	520	}
		521	#endif
528		522
529	/*	523	/*
530	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
531	*/	525	*/
532	STATIC void	526	static void
533	destroy_stacks(pTHX)	527	coro_destroy_stacks (pTHX)
534	{	528	{
535	if (!IN_DESTRUCT)
536	{
537	/* is this ugly, I ask? */
538	LEAVE_SCOPE (0);
539
540	/* sure it is, but more important: is it correct?? :/ */
541	FREETMPS;
542
543	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
544	}
545
546	while (PL_curstackinfo->si_next)	529	while (PL_curstackinfo->si_next)
547	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
548		531
549	while (PL_curstackinfo)	532	while (PL_curstackinfo)
550	{	533	{
551	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
552		535
553	{ /*D*//*remove*/
554	dSP;
555	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
556	PUTBACK; /* possibly superfluous */
557	}
558
559	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
560	{
561	dounwind (-1);/*D*//*remove*/
562	SvREFCNT_dec (PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
563	}
564		538
565	Safefree (PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
566	Safefree (PL_curstackinfo);	540	Safefree (PL_curstackinfo);
567	PL_curstackinfo = p;	541	PL_curstackinfo = p;
568	}	542	}
569		543
570	Safefree (PL_tmps_stack);	544	Safefree (PL_tmps_stack);
571	Safefree (PL_markstack);	545	Safefree (PL_markstack);
572	Safefree (PL_scopestack);	546	Safefree (PL_scopestack);
573	Safefree (PL_savestack);	547	Safefree (PL_savestack);
		548	#if !PERL_VERSION_ATLEAST (5,9,0)
574	Safefree (PL_retstack);	549	Safefree (PL_retstack);
575	}
576
577	static void
578	allocate_stack (Coro__State ctx, int alloc)
579	{
580	coro_stack *stack;
581
582	New (0, stack, 1, coro_stack);
583
584	stack->refcnt = 1;
585	stack->usecnt = 1;
586	stack->gencnt = ctx->gencnt = 0;
587
588	if (alloc)
589	{
590	#if HAVE_MMAP
591	stack->ssize = 16384 * sizeof (long); /* mmap should do allocate-on-write for us */
592	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
593	if (stack->sptr == (void *)-1)
594	#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)
595	{	561	{
596	/*FIXME*//*D*//* reasonable stack size! */	562	#define VAR(name,type)coro->name = PL_ ## name;
597	stack->ssize = - (8192 * sizeof (long));	563	# include "state.h"
598	New (0, stack->sptr, 8192, long);	564	#undef VAR
599	}	565	}
600	}
601	else
602	stack->sptr = 0;
603		566
604	ctx->stack = stack;	567	rss += sizeof (coro->curstackinfo);
605	}	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);
606		575
607	static void	576	#if !PERL_VERSION_ATLEAST (5,9,0)
608	deallocate_stack (Coro__State ctx)	577	rss += coro->retstack_max * sizeof (OP *);
609	{	578	#endif
610	coro_stack *stack = ctx->stack;
611
612	ctx->stack = 0;
613
614	if (stack)
615	{	579	}
616	if (!--stack->refcnt)
617	{
618	#ifdef HAVE_MMAP
619	if (stack->ssize > 0 && stack->sptr)
620	munmap (stack->sptr, stack->ssize);
621	else
622	#endif
623	Safefree (stack->sptr);
624		580
625	Safefree (stack);	581	return rss;
626	}
627	else if (ctx->gencnt == stack->gencnt)
628	--stack->usecnt;
629	}
630	}	582	}
631		583
		584	/** coroutine stack handling ************************************************/
		585
632	static void	586	static void
633	setup_coro (void *arg)	587	coro_setup (pTHX_ struct coro *coro)
634	{	588	{
635	/*	589	/*
636	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
637	*/	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	SvREFCNT_inc (PL_defoutgv);
		610
		611	{
		612	dSP;
		613	LOGOP myop;
		614
		615	Zero (&myop, 1, LOGOP);
		616	myop.op_next = Nullop;
		617	myop.op_flags = OPf_WANT_VOID;
		618
		619	PUSHMARK (SP);
		620	XPUSHs (av_shift (GvAV (PL_defgv)));
		621	PUTBACK;
		622	PL_op = (OP *)&myop;
		623	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		624	SPAGAIN;
		625	}
		626
		627	ENTER; /* necessary e.g. for dounwind */
		628	}
		629
		630	static void
		631	coro_destroy (pTHX_ struct coro *coro)
		632	{
		633	if (!IN_DESTRUCT)
		634	{
		635	/* restore all saved variables and stuff */
		636	LEAVE_SCOPE (0);
		637	assert (PL_tmps_floor == -1);
		638
		639	/* free all temporaries */
		640	FREETMPS;
		641	assert (PL_tmps_ix == -1);
		642
		643	/* unwind all extra stacks */
		644	POPSTACK_TO (PL_mainstack);
		645
		646	/* unwind main stack */
		647	dounwind (-1);
		648	}
		649
		650	SvREFCNT_dec (GvSV (PL_defgv));
		651	SvREFCNT_dec (GvAV (PL_defgv));
		652	SvREFCNT_dec (GvSV (PL_errgv));
		653	SvREFCNT_dec (PL_defoutgv);
		654	SvREFCNT_dec (PL_rs);
		655	SvREFCNT_dec (GvSV (irsgv));
		656
		657	SvREFCNT_dec (coro->saved_deffh);
		658	//SvREFCNT_dec (coro->throw);
		659
		660	coro_destroy_stacks (aTHX);
		661	}
		662
		663	static void
		664	free_coro_mortal (pTHX)
		665	{
		666	if (coro_mortal)
		667	{
		668	SvREFCNT_dec (coro_mortal);
		669	coro_mortal = 0;
		670	}
		671	}
		672
		673	static int
		674	runops_trace (pTHX)
		675	{
		676	COP *oldcop = 0;
		677	int oldcxix = -2;
		678	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		679	coro_cctx *cctx = coro->cctx;
		680
		681	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		682	{
		683	PERL_ASYNC_CHECK ();
		684
		685	if (cctx->flags & CC_TRACE_ALL)
		686	{
		687	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		688	{
		689	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		690	SV **bot, **top;
		691	AV *av = newAV (); /* return values */
		692	SV **cb;
		693	dSP;
		694
		695	GV *gv = CvGV (cx->blk_sub.cv);
		696	SV *fullname = sv_2mortal (newSV (0));
		697	if (isGV (gv))
		698	gv_efullname3 (fullname, gv, 0);
		699
		700	bot = PL_stack_base + cx->blk_oldsp + 1;
		701	top = cx->blk_gimme == G_ARRAY ? SP + 1
		702	: cx->blk_gimme == G_SCALAR ? bot + 1
		703	: bot;
		704
		705	while (bot < top)
		706	av_push (av, SvREFCNT_inc (*bot++));
		707
		708	PL_runops = RUNOPS_DEFAULT;
		709	ENTER;
		710	SAVETMPS;
		711	EXTEND (SP, 3);
		712	PUSHMARK (SP);
		713	PUSHs (&PL_sv_no);
		714	PUSHs (fullname);
		715	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		716	PUTBACK;
		717	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		718	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		719	SPAGAIN;
		720	FREETMPS;
		721	LEAVE;
		722	PL_runops = runops_trace;
		723	}
		724
		725	if (oldcop != PL_curcop)
		726	{
		727	oldcop = PL_curcop;
		728
		729	if (PL_curcop != &PL_compiling)
		730	{
		731	SV **cb;
		732
		733	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		734	{
		735	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		736
		737	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		738	{
		739	runops_proc_t old_runops = PL_runops;
		740	dSP;
		741	GV *gv = CvGV (cx->blk_sub.cv);
		742	SV *fullname = sv_2mortal (newSV (0));
		743
		744	if (isGV (gv))
		745	gv_efullname3 (fullname, gv, 0);
		746
		747	PL_runops = RUNOPS_DEFAULT;
		748	ENTER;
		749	SAVETMPS;
		750	EXTEND (SP, 3);
		751	PUSHMARK (SP);
		752	PUSHs (&PL_sv_yes);
		753	PUSHs (fullname);
		754	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		755	PUTBACK;
		756	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		757	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		758	SPAGAIN;
		759	FREETMPS;
		760	LEAVE;
		761	PL_runops = runops_trace;
		762	}
		763
		764	oldcxix = cxstack_ix;
		765	}
		766
		767	if (cctx->flags & CC_TRACE_LINE)
		768	{
		769	dSP;
		770
		771	PL_runops = RUNOPS_DEFAULT;
		772	ENTER;
		773	SAVETMPS;
		774	EXTEND (SP, 3);
		775	PL_runops = RUNOPS_DEFAULT;
		776	PUSHMARK (SP);
		777	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		778	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		779	PUTBACK;
		780	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		781	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		782	SPAGAIN;
		783	FREETMPS;
		784	LEAVE;
		785	PL_runops = runops_trace;
		786	}
		787	}
		788	}
		789	}
		790	}
		791
		792	TAINT_NOT;
		793	return 0;
		794	}
		795
		796	/* inject a fake call to Coro::State::_cctx_init into the execution */
		797	/* _cctx_init should be careful, as it could be called at almost any time */
		798	/* during execution of a perl program */
		799	static void NOINLINE
		800	prepare_cctx (pTHX_ coro_cctx *cctx)
		801	{
		802	dSP;
		803	LOGOP myop;
		804
		805	PL_top_env = &PL_start_env;
		806
		807	if (cctx->flags & CC_TRACE)
		808	PL_runops = runops_trace;
		809
		810	Zero (&myop, 1, LOGOP);
		811	myop.op_next = PL_op;
		812	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		813
		814	PUSHMARK (SP);
		815	EXTEND (SP, 2);
		816	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		817	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		818	PUTBACK;
		819	PL_op = (OP *)&myop;
		820	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		821	SPAGAIN;
		822	}
		823
		824	/*
		825	* this is a _very_ stripped down perl interpreter ;)
		826	*/
		827	static void
		828	coro_run (void *arg)
		829	{
638	dTHX;	830	dTHX;
639	dSP;
640	Coro__State ctx = (Coro__State)arg;
641	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
642		831
643	coro_init_stacks (aTHX);	832	/* coro_run is the alternative tail of transfer(), so unlock here. */
644	/*PL_curcop = 0;*/	833	UNLOCK;
645	/*PL_in_eval = PL_in_eval;*/ /* inherit */
646	SvREFCNT_dec (GvAV (PL_defgv));
647	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
648		834
649	SPAGAIN;	835	/* we now skip the entersub that lead to transfer() */
		836	PL_op = PL_op->op_next;
650		837
651	if (ctx->stack)	838	/* inject a fake subroutine call to cctx_init */
652	{	839	prepare_cctx (aTHX_ (coro_cctx *)arg);
653	ctx->cursp = 0;
654		840
655	PUSHMARK(SP);	841	/* somebody or something will hit me for both perl_run and PL_restartop */
656	PUTBACK;	842	PL_restartop = PL_op;
657	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	843	perl_run (PL_curinterp);
658		844
659	if (SvTRUE (ERRSV))	845	/*
660	croak (NULL);	846	* If perl-run returns we assume exit() was being called or the coro
661	else	847	* fell off the end, which seems to be the only valid (non-bug)
662	croak ("FATAL: CCTXT coroutine returned!");	848	* reason for perl_run to return. We try to exit by jumping to the
		849	* bootstrap-time "top" top_env, as we cannot restore the "main"
		850	* coroutine as Coro has no such concept
		851	*/
		852	PL_top_env = main_top_env;
		853	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		854	}
		855
		856	static coro_cctx *
		857	cctx_new ()
		858	{
		859	coro_cctx *cctx;
		860	void *stack_start;
		861	size_t stack_size;
		862
		863	++cctx_count;
		864
		865	Newz (0, cctx, 1, coro_cctx);
		866
		867	#if HAVE_MMAP
		868
		869	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		870	/* mmap supposedly does allocate-on-write for us */
		871	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		872
		873	if (cctx->sptr != (void *)-1)
		874	{
		875	# if CORO_STACKGUARD
		876	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		877	# endif
		878	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		879	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		880	cctx->flags |= CC_MAPPED;
663	}	881	}
664	else	882	else
665	{	883	#endif
666	UNOP myop;
667
668	PL_op = (OP *)&myop;
669
670	Zero(&myop, 1, UNOP);
671	myop.op_next = Nullop;
672	myop.op_flags = OPf_WANT_VOID;
673
674	PUSHMARK(SP);
675	XPUSHs (sub_init);
676	/*
677	* the next line is slightly wrong, as PL_op->op_next
678	* is actually being executed so we skip the first op.
679	* that doesn't matter, though, since it is only
680	* pp_nextstate and we never return...
681	* ah yes, and I don't care anyways ;)
682	*/
683	PUTBACK;
684	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
685	SPAGAIN;
686
687	ENTER; /* necessary e.g. for dounwind */
688	}	884	{
689	}	885	cctx->ssize = coro_stacksize * (long)sizeof (long);
		886	New (0, cctx->sptr, coro_stacksize, long);
690		887
691	static void	888	if (!cctx->sptr)
692	continue_coro (void *arg)	889	{
693	{	890	perror ("FATAL: unable to allocate stack for coroutine");
694	/*	891	_exit (EXIT_FAILURE);
695	* this is a _very_ stripped down perl interpreter ;)	892	}
696	*/
697	dTHX;
698	Coro__State ctx = (Coro__State)arg;
699	JMPENV coro_start_env;
700		893
701	PL_top_env = &ctx->start_env;	894	stack_start = cctx->sptr;
		895	stack_size = cctx->ssize;
		896	}
702		897
703	ctx->cursp = 0;	898	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
704	PL_op = PL_op->op_next;	899	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
705	CALLRUNOPS(aTHX);
706		900
707	abort ();	901	return cctx;
708	}	902	}
709		903
710	STATIC void	904	static void
		905	cctx_destroy (coro_cctx *cctx)
		906	{
		907	if (!cctx)
		908	return;
		909
		910	--cctx_count;
		911
		912	#if CORO_USE_VALGRIND
		913	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		914	#endif
		915
		916	#if HAVE_MMAP
		917	if (cctx->flags & CC_MAPPED)
		918	munmap (cctx->sptr, cctx->ssize);
		919	else
		920	#endif
		921	Safefree (cctx->sptr);
		922
		923	Safefree (cctx);
		924	}
		925
		926	static coro_cctx *
		927	cctx_get (pTHX)
		928	{
		929	while (cctx_first)
		930	{
		931	coro_cctx *cctx = cctx_first;
		932	cctx_first = cctx->next;
		933	--cctx_idle;
		934
		935	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		936	return cctx;
		937
		938	cctx_destroy (cctx);
		939	}
		940
		941	return cctx_new ();
		942	}
		943
		944	static void
		945	cctx_put (coro_cctx *cctx)
		946	{
		947	/* free another cctx if overlimit */
		948	if (cctx_idle >= MAX_IDLE_CCTX)
		949	{
		950	coro_cctx *first = cctx_first;
		951	cctx_first = first->next;
		952	--cctx_idle;
		953
		954	cctx_destroy (first);
		955	}
		956
		957	++cctx_idle;
		958	cctx->next = cctx_first;
		959	cctx_first = cctx;
		960	}
		961
		962	/** coroutine switching *****************************************************/
		963
		964	static void NOINLINE
		965	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		966	{
		967	if (prev != next)
		968	{
		969	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		970	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		971
		972	if (next->flags & CF_RUNNING)
		973	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		974
		975	if (next->flags & CF_DESTROYED)
		976	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		977
		978	if (PL_lex_state != LEX_NOTPARSING)
		979	croak ("Coro::State::transfer called while parsing, but this is not supported");
		980	}
		981	}
		982
		983	/* always use the TRANSFER macro */
		984	static void NOINLINE
711	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	985	transfer (pTHX_ struct coro *prev, struct coro *next)
712	{	986	{
713	dSTACKLEVEL;	987	dSTACKLEVEL;
714		988
		989	/* sometimes transfer is only called to set idle_sp */
		990	if (!next)
		991	{
		992	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		993	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		994	}
715	if (prev != next)	995	else if (prev != next)
716	{	996	{
717	if (next->mainstack)	997	coro_cctx *prev__cctx;
		998
		999	if (prev->flags & CF_NEW)
718	{	1000	{
719	LOCK;	1001	/* create a new empty context */
720	SAVE (prev, flags);	1002	Newz (0, prev->cctx, 1, coro_cctx);
721	LOAD (next);	1003	prev->flags &= ~CF_NEW;
722	UNLOCK;	1004	prev->flags |= CF_RUNNING;
723
724	/* mark this state as in-use */
725	next->mainstack = 0;
726	next->tmps_ix = -2;
727
728	/* stacklevel changed? if yes, grab the stack for us! */
729	if (flags & TRANSFER_SAVE_CCTXT)
730	{
731	if (!prev->stack)
732	allocate_stack (prev, 0);
733	else if (prev->cursp != stacklevel
734	&& prev->stack->usecnt > 1)
735	{
736	prev->gencnt = ++prev->stack->gencnt;
737	prev->stack->usecnt = 1;
738	}
739
740	/* has our stack been invalidated? */
741	if (next->stack && next->stack->gencnt != next->gencnt)
742	{
743	deallocate_stack (next);
744	allocate_stack (next, 1);
745	coro_create (&(next->stack->cctx),
746	continue_coro, (void *)next,
747	next->stack->sptr, labs (next->stack->ssize));
748	}
749
750	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
751	prev->cursp = stacklevel;
752	/* don't add any code here */
753	}
754	else
755	next->cursp = stacklevel;
756	}	1005	}
757	else if (next->tmps_ix == -2)	1006
758	croak ("tried to transfer to running coroutine");	1007	prev->flags &= ~CF_RUNNING;
		1008	next->flags |= CF_RUNNING;
		1009
		1010	LOCK;
		1011
		1012	if (next->flags & CF_NEW)
		1013	{
		1014	/* need to start coroutine */
		1015	next->flags &= ~CF_NEW;
		1016	/* first get rid of the old state */
		1017	save_perl (aTHX_ prev);
		1018	/* setup coroutine call */
		1019	coro_setup (aTHX_ next);
		1020	}
759	else	1021	else
760	{	1022	{
761	LOCK;	1023	/* coroutine already started */
762	SAVE (prev, -1); /* first get rid of the old state */	1024	save_perl (aTHX_ prev);
763	UNLOCK;	1025	load_perl (aTHX_ next);
764
765	if (flags & TRANSFER_SAVE_CCTXT)
766	{
767	if (!prev->stack)
768	allocate_stack (prev, 0);
769
770	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
771	{
772	PL_top_env = &next->start_env;
773
774	setup_coro (next);
775	next->cursp = stacklevel;
776
777	prev->stack->refcnt++;
778	prev->stack->usecnt++;
779	next->stack = prev->stack;
780	next->gencnt = prev->gencnt;
781	}
782	else
783	{
784	assert (!next->stack);
785	allocate_stack (next, 1);
786	coro_create (&(next->stack->cctx),
787	setup_coro, (void *)next,
788	next->stack->sptr, labs (next->stack->ssize));
789	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
790	prev->cursp = stacklevel;
791	/* don't add any code here */
792	}
793	}
794	else
795	{
796	setup_coro (next);
797	next->cursp = stacklevel;
798	}
799	}	1026	}
800	}
801		1027
802	LOCK;	1028	prev__cctx = prev->cctx;
803	if (coro_mortal)	1029
804	{	1030	/* possibly "free" the cctx */
805	SvREFCNT_dec (coro_mortal);	1031	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
806	coro_mortal = 0;	1032	{
807	}	1033	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1034	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1035
		1036	prev->cctx = 0;
		1037
		1038	cctx_put (prev__cctx);
		1039	}
		1040
		1041	++next->usecount;
		1042
		1043	if (!next->cctx)
		1044	next->cctx = cctx_get (aTHX);
		1045
		1046	if (prev__cctx != next->cctx)
		1047	{
		1048	prev__cctx->top_env = PL_top_env;
		1049	PL_top_env = next->cctx->top_env;
		1050	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1051	}
		1052
		1053	free_coro_mortal (aTHX);
808	UNLOCK;	1054	UNLOCK;
		1055	}
809	}	1056	}
810		1057
811	#define SV_CORO(sv,func) \	1058	struct transfer_args
812	do { \	1059	{
813	if (SvROK (sv)) \	1060	struct coro *prev, *next;
814	sv = SvRV (sv); \	1061	};
815	\
816	if (SvTYPE (sv) == SVt_PVHV) \
817	{ \
818	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
819	\
820	if (!he) \
821	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
822	\
823	(sv) = SvRV (HeVAL(he)); \
824	} \
825	\
826	/* must also be changed inside Coro::Cont::yield */ \
827	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
828	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
829	\
830	} while(0)
831		1062
832	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1063	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1064	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
833		1065
		1066	/** high level stuff ********************************************************/
		1067
834	static void	1068	static int
		1069	coro_state_destroy (pTHX_ struct coro *coro)
		1070	{
		1071	if (coro->flags & CF_DESTROYED)
		1072	return 0;
		1073
		1074	coro->flags |= CF_DESTROYED;
		1075
		1076	if (coro->flags & CF_READY)
		1077	{
		1078	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1079	/* alternative: look through all ready queues and remove the coro */
		1080	LOCK;
		1081	--coro_nready;
		1082	UNLOCK;
		1083	}
		1084	else
		1085	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		1086
		1087	if (coro->mainstack && coro->mainstack != main_mainstack)
		1088	{
		1089	struct coro temp;
		1090
		1091	if (coro->flags & CF_RUNNING)
		1092	croak ("FATAL: tried to destroy currently running coroutine");
		1093
		1094	save_perl (aTHX_ &temp);
		1095	load_perl (aTHX_ coro);
		1096
		1097	coro_destroy (aTHX_ coro);
		1098
		1099	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1100
		1101	coro->mainstack = 0;
		1102	}
		1103
		1104	cctx_destroy (coro->cctx);
		1105	SvREFCNT_dec (coro->args);
		1106
		1107	if (coro->next) coro->next->prev = coro->prev;
		1108	if (coro->prev) coro->prev->next = coro->next;
		1109	if (coro == coro_first) coro_first = coro->next;
		1110
		1111	return 1;
		1112	}
		1113
		1114	static int
		1115	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1116	{
		1117	struct coro *coro = (struct coro *)mg->mg_ptr;
		1118	mg->mg_ptr = 0;
		1119
		1120	coro->hv = 0;
		1121
		1122	if (--coro->refcnt < 0)
		1123	{
		1124	coro_state_destroy (aTHX_ coro);
		1125	Safefree (coro);
		1126	}
		1127
		1128	return 0;
		1129	}
		1130
		1131	static int
		1132	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1133	{
		1134	struct coro *coro = (struct coro *)mg->mg_ptr;
		1135
		1136	++coro->refcnt;
		1137
		1138	return 0;
		1139	}
		1140
		1141	static MGVTBL coro_state_vtbl = {
		1142	0, 0, 0, 0,
		1143	coro_state_free,
		1144	0,
		1145	#ifdef MGf_DUP
		1146	coro_state_dup,
		1147	#else
		1148	# define MGf_DUP 0
		1149	#endif
		1150	};
		1151
		1152	static void
		1153	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1154	{
		1155	ta->prev = SvSTATE (prev_sv);
		1156	ta->next = SvSTATE (next_sv);
		1157	TRANSFER_CHECK (*ta);
		1158	}
		1159
		1160	static void
835	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1161	api_transfer (SV *prev_sv, SV *next_sv)
836	{	1162	{
837	SV_CORO (prev, "Coro::transfer");	1163	dTHX;
838	SV_CORO (next, "Coro::transfer");	1164	struct transfer_args ta;
839		1165
840	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1166	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1167	TRANSFER (ta);
841	}	1168	}
842		1169
843	/** Coro ********************************************************************/	1170	/** Coro ********************************************************************/
844		1171
845	#define PRIO_MAX 3
846	#define PRIO_HIGH 1
847	#define PRIO_NORMAL 0
848	#define PRIO_LOW -1
849	#define PRIO_IDLE -3
850	#define PRIO_MIN -4
851
852	/* for Coro.pm */
853	static GV *coro_current, *coro_idle;
854	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
855	static int coro_nready;
856
857	static void	1172	static void
858	coro_enq (pTHX_ SV *sv)	1173	coro_enq (pTHX_ SV *coro_sv)
859	{	1174	{
860	if (SvTYPE (sv) == SVt_PVHV)
861	{
862	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
863	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
864
865	prio = prio > PRIO_MAX ? PRIO_MAX
866	: prio < PRIO_MIN ? PRIO_MIN
867	: prio;
868
869	av_push (coro_ready [prio - PRIO_MIN], sv);	1175	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
870	coro_nready++;
871
872	return;
873	}
874
875	croak ("Coro::ready tried to enqueue something that is not a coroutine");
876	}	1176	}
877		1177
878	static SV *	1178	static SV *
879	coro_deq (pTHX_ int min_prio)	1179	coro_deq (pTHX_ int min_prio)
880	{	1180	{
…		…
883	min_prio -= PRIO_MIN;	1183	min_prio -= PRIO_MIN;
884	if (min_prio < 0)	1184	if (min_prio < 0)
885	min_prio = 0;	1185	min_prio = 0;
886		1186
887	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1187	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
888	if (av_len (coro_ready[prio]) >= 0)	1188	if (AvFILLp (coro_ready [prio]) >= 0)
889	{
890	coro_nready--;
891	return av_shift (coro_ready[prio]);	1189	return av_shift (coro_ready [prio]);
892	}
893		1190
894	return 0;	1191	return 0;
895	}	1192	}
896		1193
897	static void	1194	static int
898	api_ready (SV *coro)	1195	api_ready (SV *coro_sv)
899	{	1196	{
900	dTHX;	1197	dTHX;
		1198	struct coro *coro;
901		1199
902	if (SvROK (coro))	1200	if (SvROK (coro_sv))
903	coro = SvRV (coro);	1201	coro_sv = SvRV (coro_sv);
		1202
		1203	coro = SvSTATE (coro_sv);
		1204
		1205	if (coro->flags & CF_READY)
		1206	return 0;
		1207
		1208	coro->flags |= CF_READY;
904		1209
905	LOCK;	1210	LOCK;
906	coro_enq (aTHX_ SvREFCNT_inc (coro));	1211	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1212	++coro_nready;
907	UNLOCK;	1213	UNLOCK;
		1214
		1215	return 1;
		1216	}
		1217
		1218	static int
		1219	api_is_ready (SV *coro_sv)
		1220	{
		1221	dTHX;
		1222	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1223	}
		1224
		1225	static void
		1226	prepare_schedule (pTHX_ struct transfer_args *ta)
		1227	{
		1228	SV *prev_sv, *next_sv;
		1229
		1230	for (;;)
		1231	{
		1232	LOCK;
		1233	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1234
		1235	/* nothing to schedule: call the idle handler */
		1236	if (!next_sv)
		1237	{
		1238	dSP;
		1239	UNLOCK;
		1240
		1241	ENTER;
		1242	SAVETMPS;
		1243
		1244	PUSHMARK (SP);
		1245	PUTBACK;
		1246	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1247
		1248	FREETMPS;
		1249	LEAVE;
		1250	continue;
		1251	}
		1252
		1253	ta->next = SvSTATE (next_sv);
		1254
		1255	/* cannot transfer to destroyed coros, skip and look for next */
		1256	if (ta->next->flags & CF_DESTROYED)
		1257	{
		1258	UNLOCK;
		1259	SvREFCNT_dec (next_sv);
		1260	/* coro_nready is already taken care of by destroy */
		1261	continue;
		1262	}
		1263
		1264	--coro_nready;
		1265	UNLOCK;
		1266	break;
		1267	}
		1268
		1269	/* free this only after the transfer */
		1270	prev_sv = SvRV (coro_current);
		1271	ta->prev = SvSTATE (prev_sv);
		1272	TRANSFER_CHECK (*ta);
		1273	assert (ta->next->flags & CF_READY);
		1274	ta->next->flags &= ~CF_READY;
		1275	SvRV_set (coro_current, next_sv);
		1276
		1277	LOCK;
		1278	free_coro_mortal (aTHX);
		1279	coro_mortal = prev_sv;
		1280	UNLOCK;
		1281	}
		1282
		1283	static void
		1284	prepare_cede (pTHX_ struct transfer_args *ta)
		1285	{
		1286	api_ready (coro_current);
		1287	prepare_schedule (aTHX_ ta);
		1288	}
		1289
		1290	static int
		1291	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1292	{
		1293	if (coro_nready)
		1294	{
		1295	SV *prev = SvRV (coro_current);
		1296	prepare_schedule (aTHX_ ta);
		1297	api_ready (prev);
		1298	return 1;
		1299	}
		1300	else
		1301	return 0;
908	}	1302	}
909		1303
910	static void	1304	static void
911	api_schedule (void)	1305	api_schedule (void)
912	{	1306	{
913	dTHX;	1307	dTHX;
		1308	struct transfer_args ta;
914		1309
915	SV *prev, *next;	1310	prepare_schedule (aTHX_ &ta);
916		1311	TRANSFER (ta);
917	LOCK;
918
919	prev = SvRV (GvSV (coro_current));
920	next = coro_deq (aTHX_ PRIO_MIN);
921
922	if (!next)
923	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
924
925	/* free this only after the transfer */
926	coro_mortal = prev;
927	SV_CORO (prev, "Coro::schedule");
928
929	SvRV (GvSV (coro_current)) = next;
930
931	SV_CORO (next, "Coro::schedule");
932
933	UNLOCK;
934
935	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
936	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
937	}	1312	}
938		1313
939	static void	1314	static int
940	api_cede (void)	1315	api_cede (void)
941	{	1316	{
942	dTHX;	1317	dTHX;
		1318	struct transfer_args ta;
943		1319
944	LOCK;	1320	prepare_cede (aTHX_ &ta);
945	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
946	UNLOCK;
947		1321
948	api_schedule ();	1322	if (ta.prev != ta.next)
		1323	{
		1324	TRANSFER (ta);
		1325	return 1;
		1326	}
		1327	else
		1328	return 0;
949	}	1329	}
950		1330
		1331	static int
		1332	api_cede_notself (void)
		1333	{
		1334	dTHX;
		1335	struct transfer_args ta;
		1336
		1337	if (prepare_cede_notself (aTHX_ &ta))
		1338	{
		1339	TRANSFER (ta);
		1340	return 1;
		1341	}
		1342	else
		1343	return 0;
		1344	}
		1345
		1346	static void
		1347	api_trace (SV *coro_sv, int flags)
		1348	{
		1349	dTHX;
		1350	struct coro *coro = SvSTATE (coro_sv);
		1351
		1352	if (flags & CC_TRACE)
		1353	{
		1354	if (!coro->cctx)
		1355	coro->cctx = cctx_new ();
		1356	else if (!(coro->cctx->flags & CC_TRACE))
		1357	croak ("cannot enable tracing on coroutine with custom stack");
		1358
		1359	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1360	}
		1361	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1362	{
		1363	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1364
		1365	if (coro->flags & CF_RUNNING)
		1366	PL_runops = RUNOPS_DEFAULT;
		1367	else
		1368	coro->runops = RUNOPS_DEFAULT;
		1369	}
		1370	}
		1371
951	MODULE = Coro::State PACKAGE = Coro::State	1372	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
952		1373
953	PROTOTYPES: ENABLE	1374	PROTOTYPES: DISABLE
954		1375
955	BOOT:	1376	BOOT:
956	{ /* {} necessary for stoopid perl-5.6.x */	1377	{
957	#ifdef USE_ITHREADS	1378	#ifdef USE_ITHREADS
958	MUTEX_INIT (&coro_mutex);	1379	MUTEX_INIT (&coro_mutex);
959	#endif	1380	#endif
		1381	BOOT_PAGESIZE;
960		1382
961	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1383	irsgv = gv_fetchpv ("/", 1, SVt_PV);
962	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1384
963	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1385	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
964		1386
965	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1387	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
966	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1388	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
967	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1389	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
968	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1390	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
969		1391
970	main_mainstack = PL_mainstack;	1392	main_mainstack = PL_mainstack;
		1393	main_top_env = PL_top_env;
		1394
		1395	while (main_top_env->je_prev)
		1396	main_top_env = main_top_env->je_prev;
971		1397
972	coroapi.ver = CORO_API_VERSION;	1398	coroapi.ver = CORO_API_VERSION;
973	coroapi.transfer = api_transfer;	1399	coroapi.transfer = api_transfer;
974	}
975		1400
976	Coro::State	1401	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
977	_newprocess(args)	1402	}
978	SV * args	1403
979	PROTOTYPE: $	1404	SV *
		1405	new (char *klass, ...)
980	CODE:	1406	CODE:
981	Coro__State coro;	1407	{
		1408	struct coro *coro;
		1409	HV *hv;
		1410	int i;
982		1411
983	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
984	croak ("Coro::State::_newprocess expects an arrayref");
985
986	Newz (0, coro, 1, struct coro);	1412	Newz (0, coro, 1, struct coro);
		1413	coro->args = newAV ();
		1414	coro->flags = CF_NEW;
987		1415
988	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1416	if (coro_first) coro_first->prev = coro;
989	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1417	coro->next = coro_first;
990	/*coro->stack = 0;*/	1418	coro_first = coro;
991		1419
992	/* same as JMPENV_BOOTSTRAP */	1420	coro->hv = hv = newHV ();
993	/* we might be able to recycle start_env, but safe is safe */	1421	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
994	/*Zero(&coro->start_env, 1, JMPENV);*/	1422	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
995	coro->start_env.je_ret = -1;
996	coro->start_env.je_mustcatch = TRUE;
997		1423
998	RETVAL = coro;	1424	for (i = 1; i < items; i++)
		1425	av_push (coro->args, newSVsv (ST (i)));
		1426	}
999	OUTPUT:	1427	OUTPUT:
1000	RETVAL	1428	RETVAL
1001		1429
		1430	# these not obviously related functions are all rolled into the same xs
		1431	# function to increase chances that they all will call transfer with the same
		1432	# stack offset
1002	void	1433	void
1003	transfer(prev, next, flags)	1434	_set_stacklevel (...)
1004	SV *prev	1435	ALIAS:
1005	SV *next	1436	Coro::State::transfer = 1
1006	int flags	1437	Coro::schedule = 2
1007	PROTOTYPE: @	1438	Coro::cede = 3
		1439	Coro::cede_notself = 4
1008	CODE:	1440	CODE:
1009	PUTBACK;	1441	{
1010	SV_CORO (next, "Coro::transfer");	1442	struct transfer_args ta;
1011	SV_CORO (prev, "Coro::transfer");	1443
1012	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1444	switch (ix)
1013	SPAGAIN;	1445	{
		1446	case 0:
		1447	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1448	ta.next = 0;
		1449	break;
		1450
		1451	case 1:
		1452	if (items != 2)
		1453	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1454
		1455	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1456	break;
		1457
		1458	case 2:
		1459	prepare_schedule (aTHX_ &ta);
		1460	break;
		1461
		1462	case 3:
		1463	prepare_cede (aTHX_ &ta);
		1464	break;
		1465
		1466	case 4:
		1467	if (!prepare_cede_notself (aTHX_ &ta))
		1468	XSRETURN_EMPTY;
		1469
		1470	break;
		1471	}
		1472
		1473	BARRIER;
		1474	TRANSFER (ta);
		1475
		1476	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1477	XSRETURN_YES;
		1478	}
		1479
		1480	bool
		1481	_destroy (SV *coro_sv)
		1482	CODE:
		1483	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1484	OUTPUT:
		1485	RETVAL
1014		1486
1015	void	1487	void
1016	DESTROY(coro)
1017	Coro::State coro
1018	CODE:
1019
1020	if (coro->mainstack && coro->mainstack != main_mainstack)
1021	{
1022	struct coro temp;
1023
1024	PUTBACK;
1025	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1026	LOAD (aTHX_ coro);
1027	SPAGAIN;
1028
1029	destroy_stacks (aTHX);
1030
1031	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1032	SPAGAIN;
1033
1034	coro->mainstack = 0;
1035	}
1036
1037	deallocate_stack (coro);
1038	SvREFCNT_dec (coro->args);
1039	Safefree (coro);
1040
1041	void
1042	_exit(code)	1488	_exit (code)
1043	int code	1489	int code
1044	PROTOTYPE: $	1490	PROTOTYPE: $
1045	CODE:	1491	CODE:
1046	_exit (code);	1492	_exit (code);
1047		1493
1048	MODULE = Coro::State PACKAGE = Coro::Cont	1494	int
		1495	cctx_stacksize (int new_stacksize = 0)
		1496	CODE:
		1497	RETVAL = coro_stacksize;
		1498	if (new_stacksize)
		1499	coro_stacksize = new_stacksize;
		1500	OUTPUT:
		1501	RETVAL
1049		1502
1050	# this is slightly dirty (should expose a c-level api)	1503	int
		1504	cctx_count ()
		1505	CODE:
		1506	RETVAL = cctx_count;
		1507	OUTPUT:
		1508	RETVAL
		1509
		1510	int
		1511	cctx_idle ()
		1512	CODE:
		1513	RETVAL = cctx_idle;
		1514	OUTPUT:
		1515	RETVAL
1051		1516
1052	void	1517	void
1053	yield(...)	1518	list ()
1054	PROTOTYPE: @	1519	PPCODE:
		1520	{
		1521	struct coro *coro;
		1522	for (coro = coro_first; coro; coro = coro->next)
		1523	if (coro->hv)
		1524	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1525	}
		1526
		1527	void
		1528	call (Coro::State coro, SV *coderef)
		1529	ALIAS:
		1530	eval = 1
		1531	CODE:
		1532	{
		1533	if (coro->mainstack)
		1534	{
		1535	struct coro temp;
		1536	Zero (&temp, 1, struct coro);
		1537
		1538	if (!(coro->flags & CF_RUNNING))
		1539	{
		1540	save_perl (aTHX_ &temp);
		1541	load_perl (aTHX_ coro);
		1542	}
		1543
		1544	{
		1545	dSP;
		1546	ENTER;
		1547	SAVETMPS;
		1548	PUSHMARK (SP);
		1549	PUTBACK;
		1550	if (ix)
		1551	eval_sv (coderef, 0);
		1552	else
		1553	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1554	SPAGAIN;
		1555	FREETMPS;
		1556	LEAVE;
		1557	PUTBACK;
		1558	}
		1559
		1560	if (!(coro->flags & CF_RUNNING))
		1561	{
		1562	save_perl (aTHX_ coro);
		1563	load_perl (aTHX_ &temp);
		1564	}
		1565	}
		1566	}
		1567
		1568	SV *
		1569	is_ready (Coro::State coro)
		1570	PROTOTYPE: $
		1571	ALIAS:
		1572	is_ready = CF_READY
		1573	is_running = CF_RUNNING
		1574	is_new = CF_NEW
		1575	is_destroyed = CF_DESTROYED
		1576	CODE:
		1577	RETVAL = boolSV (coro->flags & ix);
		1578	OUTPUT:
		1579	RETVAL
		1580
		1581	void
		1582	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1583
		1584	SV *
		1585	has_stack (Coro::State coro)
		1586	PROTOTYPE: $
		1587	CODE:
		1588	RETVAL = boolSV (!!coro->cctx);
		1589	OUTPUT:
		1590	RETVAL
		1591
		1592	int
		1593	is_traced (Coro::State coro)
		1594	PROTOTYPE: $
		1595	CODE:
		1596	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1597	OUTPUT:
		1598	RETVAL
		1599
		1600	IV
		1601	rss (Coro::State coro)
		1602	PROTOTYPE: $
		1603	ALIAS:
		1604	usecount = 1
1055	CODE:	1605	CODE:
1056	static SV *returnstk;	1606	switch (ix)
1057	SV *sv;	1607	{
1058	AV *defav = GvAV (PL_defgv);	1608	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1059	struct coro *prev, *next;	1609	case 1: RETVAL = coro->usecount; break;
		1610	}
		1611	OUTPUT:
		1612	RETVAL
1060		1613
1061	if (!returnstk)
1062	returnstk = SvRV ((SV *)get_sv ("Coro::Cont::return", FALSE));
1063
1064	/* set up @_ -- ugly */
1065	av_clear (defav);
1066	av_fill (defav, items - 1);
1067	while (items--)
1068	av_store (defav, items, SvREFCNT_inc (ST(items)));
1069
1070	SvGETMAGIC (returnstk); /* isn't documentation wrong for mg_get? */
1071	sv = av_pop ((AV *)SvRV (returnstk));
1072	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1073	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1074	SvREFCNT_dec (sv);
1075
1076	transfer (aTHX_ prev, next, 0);
1077		1614
1078	MODULE = Coro::State PACKAGE = Coro	1615	MODULE = Coro::State PACKAGE = Coro
1079		1616
1080	# this is slightly dirty (should expose a c-level api)
1081
1082	BOOT:	1617	BOOT:
1083	{	1618	{
1084	int i;	1619	int i;
		1620
		1621	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1622	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1623	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1624
		1625	coro_current = get_sv ("Coro::current", FALSE);
		1626	SvREADONLY_on (coro_current);
		1627
1085	HV *stash = gv_stashpv ("Coro", TRUE);	1628	coro_stash = gv_stashpv ("Coro", TRUE);
1086		1629
1087	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1630	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1088	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1631	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1089	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1632	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1090	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1633	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1091	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1634	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1092	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1635	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1093
1094	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1095	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1096		1636
1097	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1637	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1098	coro_ready[i] = newAV ();	1638	coro_ready[i] = newAV ();
1099		1639
1100	{	1640	{
1101	SV *sv = perl_get_sv("Coro::API", 1);	1641	SV *sv = perl_get_sv("Coro::API", 1);
1102		1642
1103	coroapi.schedule = api_schedule;	1643	coroapi.schedule = api_schedule;
1104	coroapi.cede = api_cede;	1644	coroapi.cede = api_cede;
		1645	coroapi.cede_notself = api_cede_notself;
1105	coroapi.ready = api_ready;	1646	coroapi.ready = api_ready;
		1647	coroapi.is_ready = api_is_ready;
1106	coroapi.nready = &coro_nready;	1648	coroapi.nready = &coro_nready;
1107	coroapi.current = coro_current;	1649	coroapi.current = coro_current;
1108		1650
1109	GCoroAPI = &coroapi;	1651	GCoroAPI = &coroapi;
1110	sv_setiv(sv, (IV)&coroapi);	1652	sv_setiv (sv, (IV)&coroapi);
1111	SvREADONLY_on(sv);	1653	SvREADONLY_on (sv);
1112	}	1654	}
1113	}	1655	}
1114		1656
1115	#if !PERL_MICRO
1116
1117	void	1657	void
1118	ready(self)	1658	_set_current (SV *current)
1119	SV * self
1120	PROTOTYPE: $	1659	PROTOTYPE: $
1121	CODE:	1660	CODE:
1122	api_ready (self);	1661	SvREFCNT_dec (SvRV (coro_current));
1123		1662	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1124	#endif
1125		1663
1126	int	1664	int
		1665	prio (Coro::State coro, int newprio = 0)
		1666	ALIAS:
		1667	nice = 1
		1668	CODE:
		1669	{
		1670	RETVAL = coro->prio;
		1671
		1672	if (items > 1)
		1673	{
		1674	if (ix)
		1675	newprio = coro->prio - newprio;
		1676
		1677	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1678	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1679
		1680	coro->prio = newprio;
		1681	}
		1682	}
		1683	OUTPUT:
		1684	RETVAL
		1685
		1686	SV *
		1687	ready (SV *self)
		1688	PROTOTYPE: $
		1689	CODE:
		1690	RETVAL = boolSV (api_ready (self));
		1691	OUTPUT:
		1692	RETVAL
		1693
		1694	int
1127	nready(...)	1695	nready (...)
1128	PROTOTYPE:	1696	PROTOTYPE:
1129	CODE:	1697	CODE:
1130	RETVAL = coro_nready;	1698	RETVAL = coro_nready;
1131	OUTPUT:	1699	OUTPUT:
1132	RETVAL	1700	RETVAL
1133		1701
		1702	# for async_pool speedup
1134	void	1703	void
1135	schedule(...)	1704	_pool_1 (SV *cb)
1136	PROTOTYPE:
1137	CODE:	1705	CODE:
1138	api_schedule ();	1706	{
		1707	struct coro *coro = SvSTATE (coro_current);
		1708	HV *hv = (HV *)SvRV (coro_current);
		1709	AV *defav = GvAV (PL_defgv);
		1710	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1711	AV *invoke_av;
		1712	int i, len;
		1713
		1714	if (!invoke)
		1715	croak ("\3terminate\2\n");
		1716
		1717	SvREFCNT_dec (coro->saved_deffh);
		1718	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1719
		1720	hv_store (hv, "desc", sizeof ("desc") - 1,
		1721	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1722
		1723	invoke_av = (AV *)SvRV (invoke);
		1724	len = av_len (invoke_av);
		1725
		1726	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1727
		1728	if (len > 0)
		1729	{
		1730	av_fill (defav, len - 1);
		1731	for (i = 0; i < len; ++i)
		1732	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1733	}
		1734
		1735	SvREFCNT_dec (invoke);
		1736	}
1139		1737
1140	void	1738	void
1141	cede(...)	1739	_pool_2 (SV *cb)
1142	PROTOTYPE:
1143	CODE:	1740	CODE:
1144	api_cede ();	1741	{
		1742	struct coro *coro = SvSTATE (coro_current);
1145		1743
		1744	sv_setsv (cb, &PL_sv_undef);
		1745
		1746	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1747	coro->saved_deffh = 0;
		1748
		1749	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1750	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1751	croak ("\3terminate\2\n");
		1752
		1753	av_clear (GvAV (PL_defgv));
		1754	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1755	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1756
		1757	coro->prio = 0;
		1758
		1759	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1760	api_trace (coro_current, 0);
		1761
		1762	av_push (av_async_pool, newSVsv (coro_current));
		1763	}
		1764
		1765
		1766	MODULE = Coro::State PACKAGE = Coro::AIO
		1767
		1768	SV *
		1769	_get_state ()
		1770	CODE:
		1771	{
		1772	struct io_state *data;
		1773
		1774	RETVAL = newSV (sizeof (struct io_state));
		1775	data = (struct io_state *)SvPVX (RETVAL);
		1776	SvCUR_set (RETVAL, sizeof (struct io_state));
		1777	SvPOK_only (RETVAL);
		1778
		1779	data->errorno = errno;
		1780	data->laststype = PL_laststype;
		1781	data->laststatval = PL_laststatval;
		1782	data->statcache = PL_statcache;
		1783	}
		1784	OUTPUT:
		1785	RETVAL
		1786
		1787	void
		1788	_set_state (char *data_)
		1789	PROTOTYPE: $
		1790	CODE:
		1791	{
		1792	struct io_state *data = (void *)data_;
		1793
		1794	errno = data->errorno;
		1795	PL_laststype = data->laststype;
		1796	PL_laststatval = data->laststatval;
		1797	PL_statcache = data->statcache;
		1798	}
		1799

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines