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Comparing Coro/Coro/State.xs (file contents):
Revision 1.67 by root, Mon Dec 12 20:07:44 2005 UTC vs.
Revision 1.178 by root, Wed Oct 3 01:48:06 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	// threaded perls might need much more, 65536 or more,	11	#include <stdio.h>
12	// which is 0.5 to 1MB	12	#include <errno.h>
13	#define STACKSIZE 16384	13	#include <assert.h>
14		14
15	#if PERL_VERSION < 6	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)
16	# ifndef PL_ppaddr	55	# ifndef PL_ppaddr
17	# define PL_ppaddr ppaddr	56	# define PL_ppaddr ppaddr
18	# endif	57	# endif
19	# ifndef call_sv	58	# ifndef call_sv
20	# define call_sv perl_call_sv	59	# define call_sv perl_call_sv
…		…
31	# ifndef IS_PADCONST	70	# ifndef IS_PADCONST
32	# define IS_PADCONST(v) 0	71	# define IS_PADCONST(v) 0
33	# endif	72	# endif
34	#endif	73	#endif
35		74
36	#include <signal.h>	75	/* 5.8.7 */
37		76	#ifndef SvRV_set
38	#ifdef HAVE_MMAP	77	# define SvRV_set(s,v) SvRV(s) = (v)
39	# include <unistd.h>
40	# include <sys/mman.h>
41	# ifndef MAP_ANONYMOUS
42	# ifdef MAP_ANON
43	# define MAP_ANONYMOUS MAP_ANON
44	# else
45	# undef HAVE_MMAP
46	# endif
47	# endif	78	#endif
48	#endif
49		79
50	#define SUB_INIT "Coro::State::initialize"	80	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
51	#define UCORO_STATE "_coro_state"	81	# undef CORO_STACKGUARD
		82	#endif
52		83
53	/* The next macro should declare a variable stacklevel that contains and approximation	84	#ifndef CORO_STACKGUARD
54	* to the current C stack pointer. Its property is that it changes with each call	85	# define CORO_STACKGUARD 0
55	* 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
56	#define dSTACKLEVEL void *stacklevel = &stacklevel	96	#define STACKLEVEL ((void *)&stacklevel)
57		97
58	#define IN_DESTRUCT (PL_main_cv == Nullcv)	98	#define IN_DESTRUCT (PL_main_cv == Nullcv)
59		99
60	#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))
61		109
62	#include "CoroAPI.h"	110	#include "CoroAPI.h"
63		111
64	#ifdef USE_ITHREADS	112	#ifdef USE_ITHREADS
65	static perl_mutex coro_mutex;	113	static perl_mutex coro_mutex;
66	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	114	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
67	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	115	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
68	#else	116	#else
69	# define LOCK 0	117	# define LOCK (void)0
70	# define UNLOCK 0	118	# define UNLOCK (void)0
71	#endif	119	#endif
72		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;
73	static struct CoroAPI coroapi;	131	static struct CoroAPI coroapi;
74	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;
75	static HV *coro_state_stash;	134	static HV *coro_state_stash, *coro_stash;
76	static SV *ucoro_state_sv;
77	static U32 ucoro_state_hash;
78	static SV *coro_mortal; /* will be freed after next transfer */	135	static SV *coro_mortal; /* will be freed after next transfer */
79		136
80	/* 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 */
81	typedef struct {	157	typedef struct coro_cctx {
82	int refcnt; /* pointer reference counter */	158	struct coro_cctx *next;
83	int usecnt; /* shared by how many coroutines */
84	int gencnt; /* generation counter */
85		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;
86	coro_context cctx;	168	coro_context cctx;
87		169
88	void *sptr;	170	#if CORO_USE_VALGRIND
89	long ssize; /* positive == mmap, otherwise malloc */	171	int valgrind_id;
90	} coro_stack;	172	#endif
		173	unsigned char flags;
		174	} coro_cctx;
91		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 */
92	struct coro {	184	struct coro {
93	/* the top-level JMPENV for each coroutine, needed to catch dies. */	185	/* the c coroutine allocated to this perl coroutine, if any */
94	JMPENV start_env;	186	coro_cctx *cctx;
95
96	/* the optional C context */
97	coro_stack *stack;
98	void *cursp;
99	int gencnt;
100
101	/* optionally saved, might be zero */
102	AV *defav;
103	SV *defsv;
104	SV *errsv;
105
106	/* saved global state not related to stacks */
107	U8 dowarn;
108	I32 in_eval;
109
110	/* the stacks and related info (callchain etc..) */
111	PERL_SI *curstackinfo;
112	AV *curstack;
113	AV *mainstack;
114	SV **stack_sp;
115	OP *op;
116	SV **curpad;
117	AV *comppad;
118	CV *compcv;
119	SV **stack_base;
120	SV **stack_max;
121	SV **tmps_stack;
122	I32 tmps_floor;
123	I32 tmps_ix;
124	I32 tmps_max;
125	I32 *markstack;
126	I32 *markstack_ptr;
127	I32 *markstack_max;
128	I32 *scopestack;
129	I32 scopestack_ix;
130	I32 scopestack_max;
131	ANY *savestack;
132	I32 savestack_ix;
133	I32 savestack_max;
134	OP **retstack;
135	I32 retstack_ix;
136	I32 retstack_max;
137	PMOP *curpm;
138	COP *curcop;
139	JMPENV *top_env;
140		187
141	/* data associated with this coroutine (initial args) */	188	/* data associated with this coroutine (initial args) */
142	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	IO *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 switches to this coro */
		207
		208	/* coro process data */
		209	int prio;
		210
		211	/* linked list */
		212	struct coro *next, *prev;
		213	HV *hv; /* the perl hash associated with this coro, if any */
143	};	214	};
144		215
145	typedef struct coro *Coro__State;	216	typedef struct coro *Coro__State;
146	typedef struct coro *Coro__State_or_hashref;	217	typedef struct coro *Coro__State_or_hashref;
147		218
148	/* mostly copied from op.c:cv_clone2 */	219	/** Coro ********************************************************************/
149	STATIC AV *	220
150	clone_padlist (pTHX_ AV *protopadlist)	221	#define PRIO_MAX 3
		222	#define PRIO_HIGH 1
		223	#define PRIO_NORMAL 0
		224	#define PRIO_LOW -1
		225	#define PRIO_IDLE -3
		226	#define PRIO_MIN -4
		227
		228	/* for Coro.pm */
		229	static SV *coro_current;
		230	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		231	static int coro_nready;
		232	static struct coro *coro_first;
		233
		234	/** lowlevel stuff **********************************************************/
		235
		236	static AV *
		237	coro_clone_padlist (pTHX_ CV *cv)
151	{	238	{
152	AV *av;	239	AV *padlist = CvPADLIST (cv);
153	I32 ix;
154	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
155	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
156	SV **pname = AvARRAY (protopad_name);
157	SV **ppad = AvARRAY (protopad);
158	I32 fname = AvFILLp (protopad_name);
159	I32 fpad = AvFILLp (protopad);
160	AV *newpadlist, *newpad_name, *newpad;	240	AV *newpadlist, *newpad;
161	SV **npad;
162
163	newpad_name = newAV ();
164	for (ix = fname; ix >= 0; ix--)
165	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
166
167	newpad = newAV ();
168	av_fill (newpad, AvFILLp (protopad));
169	npad = AvARRAY (newpad);
170		241
171	newpadlist = newAV ();	242	newpadlist = newAV ();
172	AvREAL_off (newpadlist);	243	AvREAL_off (newpadlist);
173	av_store (newpadlist, 0, (SV *) newpad_name);	244	#if PERL_VERSION_ATLEAST (5,9,0)
		245	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		246	#else
		247	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		248	#endif
		249	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		250	--AvFILLp (padlist);
		251
		252	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
174	av_store (newpadlist, 1, (SV *) newpad);	253	av_store (newpadlist, 1, (SV *)newpad);
175
176	av = newAV (); /* will be @_ */
177	av_extend (av, 0);
178	av_store (newpad, 0, (SV *) av);
179	AvFLAGS (av) = AVf_REIFY;
180
181	for (ix = fpad; ix > 0; ix--)
182	{
183	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
184
185	if (namesv && namesv != &PL_sv_undef)
186	{
187	char *name = SvPVX (namesv); /* XXX */
188
189	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
190	{ /* lexical from outside? */
191	npad[ix] = SvREFCNT_inc (ppad[ix]);
192	}
193	else
194	{ /* our own lexical */
195	SV *sv;
196	if (*name == '&')
197	sv = SvREFCNT_inc (ppad[ix]);
198	else if (*name == '@')
199	sv = (SV *) newAV ();
200	else if (*name == '%')
201	sv = (SV *) newHV ();
202	else
203	sv = NEWSV (0, 0);
204
205	#ifdef SvPADBUSY
206	if (!SvPADBUSY (sv))
207	#endif
208	SvPADMY_on (sv);
209
210	npad[ix] = sv;
211	}
212	}
213	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
214	{
215	npad[ix] = SvREFCNT_inc (ppad[ix]);
216	}
217	else
218	{
219	SV *sv = NEWSV (0, 0);
220	SvPADTMP_on (sv);
221	npad[ix] = sv;
222	}
223	}
224
225	#if 0 /* return -ENOTUNDERSTOOD */
226	/* Now that vars are all in place, clone nested closures. */
227
228	for (ix = fpad; ix > 0; ix--) {
229	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
230	if (namesv
231	&& namesv != &PL_sv_undef
232	&& !(SvFLAGS(namesv) & SVf_FAKE)
233	&& *SvPVX(namesv) == '&'
234	&& CvCLONE(ppad[ix]))
235	{
236	CV *kid = cv_clone((CV*)ppad[ix]);
237	SvREFCNT_dec(ppad[ix]);
238	CvCLONE_on(kid);
239	SvPADMY_on(kid);
240	npad[ix] = (SV*)kid;
241	}
242	}
243	#endif
244		254
245	return newpadlist;	255	return newpadlist;
246	}	256	}
247		257
248	STATIC void	258	static void
249	free_padlist (pTHX_ AV *padlist)	259	free_padlist (pTHX_ AV *padlist)
250	{	260	{
251	/* may be during global destruction */	261	/* may be during global destruction */
252	if (SvREFCNT (padlist))	262	if (SvREFCNT (padlist))
253	{	263	{
…		…
267		277
268	SvREFCNT_dec ((SV*)padlist);	278	SvREFCNT_dec ((SV*)padlist);
269	}	279	}
270	}	280	}
271		281
272	STATIC int	282	static int
273	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	283	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
274	{	284	{
275	AV *padlist;	285	AV *padlist;
276	AV *av = (AV *)mg->mg_obj;	286	AV *av = (AV *)mg->mg_obj;
277		287
278	/* casting is fun. */	288	/* casting is fun. */
279	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	289	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
280	free_padlist (aTHX_ padlist);	290	free_padlist (aTHX_ padlist);
281		291
282	SvREFCNT_dec (av);	292	SvREFCNT_dec (av);
		293
		294	return 0;
283	}	295	}
284		296
285	#define PERL_MAGIC_coro PERL_MAGIC_ext	297	#define PERL_MAGIC_coro PERL_MAGIC_ext
286		298
287	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	299	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
288		300
		301	#define CORO_MAGIC(cv) \
		302	SvMAGIC (cv) \
		303	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		304	? SvMAGIC (cv) \
		305	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		306	: 0
		307
		308	static struct coro *
		309	SvSTATE_ (pTHX_ SV *coro)
		310	{
		311	HV *stash;
		312	MAGIC *mg;
		313
		314	if (SvROK (coro))
		315	coro = SvRV (coro);
		316
		317	if (SvTYPE (coro) != SVt_PVHV)
		318	croak ("Coro::State object required");
		319
		320	stash = SvSTASH (coro);
		321	if (stash != coro_stash && stash != coro_state_stash)
		322	{
		323	/* very slow, but rare, check */
		324	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		325	croak ("Coro::State object required");
		326	}
		327
		328	mg = CORO_MAGIC (coro);
		329	return (struct coro *)mg->mg_ptr;
		330	}
		331
		332	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
		333
289	/* the next two functions merely cache the padlists */	334	/* the next two functions merely cache the padlists */
290	STATIC void	335	static void
291	get_padlist (pTHX_ CV *cv)	336	get_padlist (pTHX_ CV *cv)
292	{	337	{
293	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	338	MAGIC *mg = CORO_MAGIC (cv);
		339	AV *av;
294		340
295	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	341	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
296	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	342	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
297	else	343	else
		344	{
		345	#if CORO_PREFER_PERL_FUNCTIONS
		346	/* this is probably cleaner, but also slower? */
		347	CV *cp = Perl_cv_clone (cv);
		348	CvPADLIST (cv) = CvPADLIST (cp);
		349	CvPADLIST (cp) = 0;
		350	SvREFCNT_dec (cp);
		351	#else
298	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	352	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		353	#endif
		354	}
299	}	355	}
300		356
301	STATIC void	357	static void
302	put_padlist (pTHX_ CV *cv)	358	put_padlist (pTHX_ CV *cv)
303	{	359	{
304	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	360	MAGIC *mg = CORO_MAGIC (cv);
		361	AV *av;
305		362
306	if (!mg)	363	if (!mg)
307	{	364	{
308	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);	365	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
309	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	366	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
310	mg->mg_virtual = &vtbl_coro;	367	mg->mg_virtual = &vtbl_coro;
311	mg->mg_obj = (SV *)newAV ();	368	mg->mg_obj = (SV *)newAV ();
312	}	369	}
313		370
314	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	371	av = (AV *)mg->mg_obj;
315	}
316		372
317	#define SB do {	373	if (AvFILLp (av) >= AvMAX (av))
318	#define SE } while (0)	374	av_extend (av, AvMAX (av) + 1);
319		375
320	#define LOAD(state) load_state(aTHX_ (state));	376	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
321	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	377	}
322		378
323	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	379	/** load & save, init *******************************************************/
324		380
325	static void	381	static void
326	load_state(pTHX_ Coro__State c)	382	load_perl (pTHX_ Coro__State c)
327	{	383	{
328	PL_dowarn = c->dowarn;	384	#define VAR(name,type) PL_ ## name = c->name;
329	PL_in_eval = c->in_eval;	385	# include "state.h"
		386	#undef VAR
330		387
331	PL_curstackinfo = c->curstackinfo;	388	GvSV (PL_defgv) = c->defsv;
332	PL_curstack = c->curstack;	389	GvAV (PL_defgv) = c->defav;
333	PL_mainstack = c->mainstack;	390	GvSV (PL_errgv) = c->errsv;
334	PL_stack_sp = c->stack_sp;	391	GvIOp(PL_defoutgv) = c->deffh;
335	PL_op = c->op;	392	PL_rs = c->irssv;
336	PL_curpad = c->curpad;	393	GvSV (irsgv) = c->irssv_sv;
337	PL_comppad = c->comppad;
338	PL_compcv = c->compcv;
339	PL_stack_base = c->stack_base;
340	PL_stack_max = c->stack_max;
341	PL_tmps_stack = c->tmps_stack;
342	PL_tmps_floor = c->tmps_floor;
343	PL_tmps_ix = c->tmps_ix;
344	PL_tmps_max = c->tmps_max;
345	PL_markstack = c->markstack;
346	PL_markstack_ptr = c->markstack_ptr;
347	PL_markstack_max = c->markstack_max;
348	PL_scopestack = c->scopestack;
349	PL_scopestack_ix = c->scopestack_ix;
350	PL_scopestack_max = c->scopestack_max;
351	PL_savestack = c->savestack;
352	PL_savestack_ix = c->savestack_ix;
353	PL_savestack_max = c->savestack_max;
354	PL_retstack = c->retstack;
355	PL_retstack_ix = c->retstack_ix;
356	PL_retstack_max = c->retstack_max;
357	PL_curpm = c->curpm;
358	PL_curcop = c->curcop;
359	PL_top_env = c->top_env;
360
361	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
362	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
363	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
364		394
365	{	395	{
366	dSP;	396	dSP;
367	CV *cv;	397	CV *cv;
368		398
369	/* now do the ugly restore mess */	399	/* now do the ugly restore mess */
370	while ((cv = (CV *)POPs))	400	while ((cv = (CV *)POPs))
371	{	401	{
372	AV *padlist = (AV *)POPs;
373
374	if (padlist)
375	{
376	put_padlist (aTHX_ cv); /* mark this padlist as available */	402	put_padlist (aTHX_ cv); /* mark this padlist as available */
377	CvPADLIST(cv) = padlist;	403	CvDEPTH (cv) = PTR2IV (POPs);
378	}	404	CvPADLIST (cv) = (AV *)POPs;
379
380	++CvDEPTH(cv);
381	}	405	}
382		406
383	PUTBACK;	407	PUTBACK;
384	}	408	}
385	}	409	}
386		410
387	static void	411	static void
388	save_state(pTHX_ Coro__State c, int flags)	412	save_perl (pTHX_ Coro__State c)
389	{	413	{
390	{	414	{
391	dSP;	415	dSP;
392	I32 cxix = cxstack_ix;	416	I32 cxix = cxstack_ix;
393	PERL_CONTEXT *ccstk = cxstack;	417	PERL_CONTEXT *ccstk = cxstack;
…		…
396	/*	420	/*
397	* the worst thing you can imagine happens first - we have to save	421	* the worst thing you can imagine happens first - we have to save
398	* (and reinitialize) all cv's in the whole callchain :(	422	* (and reinitialize) all cv's in the whole callchain :(
399	*/	423	*/
400		424
401	PUSHs (Nullsv);	425	XPUSHs (Nullsv);
402	/* this loop was inspired by pp_caller */	426	/* this loop was inspired by pp_caller */
403	for (;;)	427	for (;;)
404	{	428	{
405	while (cxix >= 0)	429	while (cxix >= 0)
406	{	430	{
407	PERL_CONTEXT *cx = &ccstk[cxix--];	431	PERL_CONTEXT *cx = &ccstk[cxix--];
408		432
409	if (CxTYPE(cx) == CXt_SUB)	433	if (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT)
410	{	434	{
411	CV *cv = cx->blk_sub.cv;	435	CV *cv = cx->blk_sub.cv;
		436
412	if (CvDEPTH(cv))	437	if (CvDEPTH (cv))
413	{	438	{
414	EXTEND (SP, CvDEPTH(cv)*2);	439	EXTEND (SP, 3);
415
416	while (--CvDEPTH(cv))
417	{
418	/* this tells the restore code to increment CvDEPTH */
419	PUSHs (Nullsv);
420	PUSHs ((SV *)cv);
421	}
422
423	PUSHs ((SV *)CvPADLIST(cv));	440	PUSHs ((SV *)CvPADLIST (cv));
		441	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
424	PUSHs ((SV *)cv);	442	PUSHs ((SV *)cv);
425		443
		444	CvDEPTH (cv) = 0;
426	get_padlist (aTHX_ cv); /* this is a monster */	445	get_padlist (aTHX_ cv);
427	}	446	}
428	}	447	}
429	#ifdef CXt_FORMAT
430	else if (CxTYPE(cx) == CXt_FORMAT)
431	{
432	/* I never used formats, so how should I know how these are implemented? */
433	/* my bold guess is as a simple, plain sub... */
434	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
435	}
436	#endif
437	}	448	}
438		449
439	if (top_si->si_type == PERLSI_MAIN)	450	if (top_si->si_type == PERLSI_MAIN)
440	break;	451	break;
441		452
442	top_si = top_si->si_prev;	453	top_si = top_si->si_prev;
443	ccstk = top_si->si_cxstack;	454	ccstk = top_si->si_cxstack;
444	cxix = top_si->si_cxix;	455	cxix = top_si->si_cxix;
445	}	456	}
446		457
447	PUTBACK;	458	PUTBACK;
448	}	459	}
449		460
450	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	461	c->defav = GvAV (PL_defgv);
451	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	462	c->defsv = DEFSV;
452	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	463	c->errsv = ERRSV;
		464	c->deffh = GvIOp (PL_defoutgv);
		465	c->irssv = PL_rs;
		466	c->irssv_sv = GvSV (irsgv);
453		467
454	c->dowarn = PL_dowarn;	468	#define VAR(name,type)c->name = PL_ ## name;
455	c->in_eval = PL_in_eval;	469	# include "state.h"
456		470	#undef VAR
457	c->curstackinfo = PL_curstackinfo;
458	c->curstack = PL_curstack;
459	c->mainstack = PL_mainstack;
460	c->stack_sp = PL_stack_sp;
461	c->op = PL_op;
462	c->curpad = PL_curpad;
463	c->comppad = PL_comppad;
464	c->compcv = PL_compcv;
465	c->stack_base = PL_stack_base;
466	c->stack_max = PL_stack_max;
467	c->tmps_stack = PL_tmps_stack;
468	c->tmps_floor = PL_tmps_floor;
469	c->tmps_ix = PL_tmps_ix;
470	c->tmps_max = PL_tmps_max;
471	c->markstack = PL_markstack;
472	c->markstack_ptr = PL_markstack_ptr;
473	c->markstack_max = PL_markstack_max;
474	c->scopestack = PL_scopestack;
475	c->scopestack_ix = PL_scopestack_ix;
476	c->scopestack_max = PL_scopestack_max;
477	c->savestack = PL_savestack;
478	c->savestack_ix = PL_savestack_ix;
479	c->savestack_max = PL_savestack_max;
480	c->retstack = PL_retstack;
481	c->retstack_ix = PL_retstack_ix;
482	c->retstack_max = PL_retstack_max;
483	c->curpm = PL_curpm;
484	c->curcop = PL_curcop;
485	c->top_env = PL_top_env;
486	}	471	}
487		472
488	/*	473	/*
489	* allocate various perl stacks. This is an exact copy	474	* allocate various perl stacks. This is an exact copy
490	* of perl.c:init_stacks, except that it uses less memory	475	* of perl.c:init_stacks, except that it uses less memory
491	* on the (sometimes correct) assumption that coroutines do	476	* on the (sometimes correct) assumption that coroutines do
492	* not usually need a lot of stackspace.	477	* not usually need a lot of stackspace.
493	*/	478	*/
494	STATIC void	479	#if CORO_PREFER_PERL_FUNCTIONS
		480	# define coro_init_stacks init_stacks
		481	#else
		482	static void
495	coro_init_stacks (pTHX)	483	coro_init_stacks (pTHX)
496	{	484	{
497	LOCK;	485	PL_curstackinfo = new_stackinfo(64, 6);
498
499	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
500	PL_curstackinfo->si_type = PERLSI_MAIN;	486	PL_curstackinfo->si_type = PERLSI_MAIN;
501	PL_curstack = PL_curstackinfo->si_stack;	487	PL_curstack = PL_curstackinfo->si_stack;
502	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	488	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
503		489
504	PL_stack_base = AvARRAY(PL_curstack);	490	PL_stack_base = AvARRAY(PL_curstack);
505	PL_stack_sp = PL_stack_base;	491	PL_stack_sp = PL_stack_base;
506	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	492	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
507		493
508	New(50,PL_tmps_stack,96,SV*);	494	New(50,PL_tmps_stack,64,SV*);
509	PL_tmps_floor = -1;	495	PL_tmps_floor = -1;
510	PL_tmps_ix = -1;	496	PL_tmps_ix = -1;
511	PL_tmps_max = 96;	497	PL_tmps_max = 64;
512		498
513	New(54,PL_markstack,16,I32);	499	New(54,PL_markstack,16,I32);
514	PL_markstack_ptr = PL_markstack;	500	PL_markstack_ptr = PL_markstack;
515	PL_markstack_max = PL_markstack + 16;	501	PL_markstack_max = PL_markstack + 16;
516		502
…		…
520		506
521	New(54,PL_scopestack,16,I32);	507	New(54,PL_scopestack,16,I32);
522	PL_scopestack_ix = 0;	508	PL_scopestack_ix = 0;
523	PL_scopestack_max = 16;	509	PL_scopestack_max = 16;
524		510
525	New(54,PL_savestack,96,ANY);	511	New(54,PL_savestack,64,ANY);
526	PL_savestack_ix = 0;	512	PL_savestack_ix = 0;
527	PL_savestack_max = 96;	513	PL_savestack_max = 64;
528		514
		515	#if !PERL_VERSION_ATLEAST (5,9,0)
529	New(54,PL_retstack,8,OP*);	516	New(54,PL_retstack,4,OP*);
530	PL_retstack_ix = 0;	517	PL_retstack_ix = 0;
531	PL_retstack_max = 8;	518	PL_retstack_max = 4;
532		519	#endif
533	UNLOCK;
534	}	520	}
		521	#endif
535		522
536	/*	523	/*
537	* destroy the stacks, the callchain etc...	524	* destroy the stacks, the callchain etc...
538	*/	525	*/
539	STATIC void	526	static void
540	destroy_stacks(pTHX)	527	coro_destroy_stacks (pTHX)
541	{	528	{
542	if (!IN_DESTRUCT)
543	{
544	/* is this ugly, I ask? */
545	LEAVE_SCOPE (0);
546
547	/* sure it is, but more important: is it correct?? :/ */
548	FREETMPS;
549
550	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
551	}
552
553	while (PL_curstackinfo->si_next)	529	while (PL_curstackinfo->si_next)
554	PL_curstackinfo = PL_curstackinfo->si_next;	530	PL_curstackinfo = PL_curstackinfo->si_next;
555		531
556	while (PL_curstackinfo)	532	while (PL_curstackinfo)
557	{	533	{
558	PERL_SI *p = PL_curstackinfo->si_prev;	534	PERL_SI *p = PL_curstackinfo->si_prev;
559		535
560	{ /*D*//*remove*/
561	dSP;
562	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
563	PUTBACK; /* possibly superfluous */
564	}
565
566	if (!IN_DESTRUCT)	536	if (!IN_DESTRUCT)
567	{
568	dounwind (-1);/*D*//*remove*/
569	SvREFCNT_dec (PL_curstackinfo->si_stack);	537	SvREFCNT_dec (PL_curstackinfo->si_stack);
570	}
571		538
572	Safefree (PL_curstackinfo->si_cxstack);	539	Safefree (PL_curstackinfo->si_cxstack);
573	Safefree (PL_curstackinfo);	540	Safefree (PL_curstackinfo);
574	PL_curstackinfo = p;	541	PL_curstackinfo = p;
575	}	542	}
576		543
577	Safefree (PL_tmps_stack);	544	Safefree (PL_tmps_stack);
578	Safefree (PL_markstack);	545	Safefree (PL_markstack);
579	Safefree (PL_scopestack);	546	Safefree (PL_scopestack);
580	Safefree (PL_savestack);	547	Safefree (PL_savestack);
		548	#if !PERL_VERSION_ATLEAST (5,9,0)
581	Safefree (PL_retstack);	549	Safefree (PL_retstack);
582	}
583
584	static void
585	allocate_stack (Coro__State ctx, int alloc)
586	{
587	coro_stack *stack;
588
589	New (0, stack, 1, coro_stack);
590
591	stack->refcnt = 1;
592	stack->usecnt = 1;
593	stack->gencnt = ctx->gencnt = 0;
594
595	if (alloc)
596	{
597	#if HAVE_MMAP
598	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
599	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
600	if (stack->sptr == (void *)-1)
601	#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)
602	{	561	{
603	/*FIXME*//*D*//* reasonable stack size! */	562	#define VAR(name,type)coro->name = PL_ ## name;
604	stack->ssize = - (STACKSIZE * sizeof (long));	563	# include "state.h"
605	New (0, stack->sptr, STACKSIZE, long);	564	#undef VAR
606	}	565	}
607	}
608	else
609	stack->sptr = 0;
610		566
611	ctx->stack = stack;	567	rss += sizeof (coro->curstackinfo);
612	}	568	rss += sizeof (struct xpvav) + (1 + AvFILL (coro->curstackinfo->si_stack)) * sizeof (SV *);
		569	rss += (coro->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		570	rss += 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);
613		575
614	static void	576	#if !PERL_VERSION_ATLEAST (5,9,0)
615	deallocate_stack (Coro__State ctx)	577	rss += coro->retstack_max * sizeof (OP *);
616	{	578	#endif
617	coro_stack *stack = ctx->stack;
618
619	ctx->stack = 0;
620
621	if (stack)
622	{	579	}
623	if (!--stack->refcnt)
624	{
625	#ifdef HAVE_MMAP
626	if (stack->ssize > 0 && stack->sptr)
627	munmap (stack->sptr, stack->ssize);
628	else
629	#endif
630	Safefree (stack->sptr);
631		580
632	Safefree (stack);	581	return rss;
633	}
634	else if (ctx->gencnt == stack->gencnt)
635	--stack->usecnt;
636	}
637	}	582	}
638		583
		584	/** coroutine stack handling ************************************************/
		585
639	static void	586	static void
640	setup_coro (void *arg)	587	setup_coro (pTHX_ struct coro *coro)
641	{	588	{
642	/*	589	/*
643	* emulate part of the perl startup here.	590	* emulate part of the perl startup here.
644	*/	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) = newSVsv (PL_rs);
		607	PL_rs = newSVpvn ("\n", 1);
		608
		609	{
		610	IO *io = newIO ();
		611	GvIOp(PL_defoutgv) = io;
		612	IoTYPE (io) = IoTYPE_WRONLY;
		613	IoOFP (io) = IoIFP (io) = PerlIO_stdout ();
		614	IoFLAGS (io) |= IOf_FLUSH;
		615	}
		616
		617	{
		618	dSP;
		619	LOGOP myop;
		620
		621	Zero (&myop, 1, LOGOP);
		622	myop.op_next = Nullop;
		623	myop.op_flags = OPf_WANT_VOID;
		624
		625	PUSHMARK (SP);
		626	XPUSHs (av_shift (GvAV (PL_defgv)));
		627	PUTBACK;
		628	PL_op = (OP *)&myop;
		629	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		630	SPAGAIN;
		631	}
		632
		633	ENTER; /* necessary e.g. for dounwind */
		634	}
		635
		636	static void
		637	destroy_coro (pTHX_ struct coro *coro)
		638	{
		639	if (!IN_DESTRUCT)
		640	{
		641	/* restore all saved variables and stuff */
		642	LEAVE_SCOPE (0);
		643	assert (PL_tmps_floor == -1);
		644
		645	/* free all temporaries */
		646	FREETMPS;
		647	assert (PL_tmps_ix == -1);
		648
		649	/* unwind all extra stacks */
		650	POPSTACK_TO (PL_mainstack);
		651
		652	/* unwind main stack */
		653	dounwind (-1);
		654	}
		655
		656	SvREFCNT_dec (GvSV (PL_defgv));
		657	SvREFCNT_dec (GvAV (PL_defgv));
		658	SvREFCNT_dec (GvSV (PL_errgv));
		659	SvREFCNT_dec (GvIOp(PL_defoutgv));
		660	SvREFCNT_dec (PL_rs);
		661	SvREFCNT_dec (GvSV (irsgv));
		662
		663	coro_destroy_stacks (aTHX);
		664	}
		665
		666	static void
		667	free_coro_mortal (pTHX)
		668	{
		669	if (coro_mortal)
		670	{
		671	SvREFCNT_dec (coro_mortal);
		672	coro_mortal = 0;
		673	}
		674	}
		675
		676	static int
		677	runops_trace (pTHX)
		678	{
		679	COP *oldcop = 0;
		680	int oldcxix = -2;
		681	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		682	coro_cctx *cctx = coro->cctx;
		683
		684	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		685	{
		686	PERL_ASYNC_CHECK ();
		687
		688	if (cctx->flags & CC_TRACE_ALL)
		689	{
		690	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		691	{
		692	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		693	SV **bot, **top;
		694	AV *av = newAV (); /* return values */
		695	SV **cb;
		696	dSP;
		697
		698	GV *gv = CvGV (cx->blk_sub.cv);
		699	SV *fullname = sv_2mortal (newSV (0));
		700	if (isGV (gv))
		701	gv_efullname3 (fullname, gv, 0);
		702
		703	bot = PL_stack_base + cx->blk_oldsp + 1;
		704	top = cx->blk_gimme == G_ARRAY ? SP + 1
		705	: cx->blk_gimme == G_SCALAR ? bot + 1
		706	: bot;
		707
		708	while (bot < top)
		709	av_push (av, SvREFCNT_inc (*bot++));
		710
		711	PL_runops = RUNOPS_DEFAULT;
		712	ENTER;
		713	SAVETMPS;
		714	EXTEND (SP, 3);
		715	PUSHMARK (SP);
		716	PUSHs (&PL_sv_no);
		717	PUSHs (fullname);
		718	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		719	PUTBACK;
		720	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		721	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		722	SPAGAIN;
		723	FREETMPS;
		724	LEAVE;
		725	PL_runops = runops_trace;
		726	}
		727
		728	if (oldcop != PL_curcop)
		729	{
		730	oldcop = PL_curcop;
		731
		732	if (PL_curcop != &PL_compiling)
		733	{
		734	SV **cb;
		735
		736	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		737	{
		738	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		739
		740	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		741	{
		742	runops_proc_t old_runops = PL_runops;
		743	dSP;
		744	GV *gv = CvGV (cx->blk_sub.cv);
		745	SV *fullname = sv_2mortal (newSV (0));
		746
		747	if (isGV (gv))
		748	gv_efullname3 (fullname, gv, 0);
		749
		750	PL_runops = RUNOPS_DEFAULT;
		751	ENTER;
		752	SAVETMPS;
		753	EXTEND (SP, 3);
		754	PUSHMARK (SP);
		755	PUSHs (&PL_sv_yes);
		756	PUSHs (fullname);
		757	PUSHs (cx->blk_sub.hasargs ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		758	PUTBACK;
		759	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		760	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		761	SPAGAIN;
		762	FREETMPS;
		763	LEAVE;
		764	PL_runops = runops_trace;
		765	}
		766
		767	oldcxix = cxstack_ix;
		768	}
		769
		770	if (cctx->flags & CC_TRACE_LINE)
		771	{
		772	dSP;
		773
		774	PL_runops = RUNOPS_DEFAULT;
		775	ENTER;
		776	SAVETMPS;
		777	EXTEND (SP, 3);
		778	PL_runops = RUNOPS_DEFAULT;
		779	PUSHMARK (SP);
		780	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		781	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		782	PUTBACK;
		783	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		784	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		785	SPAGAIN;
		786	FREETMPS;
		787	LEAVE;
		788	PL_runops = runops_trace;
		789	}
		790	}
		791	}
		792	}
		793	}
		794
		795	TAINT_NOT;
		796	return 0;
		797	}
		798
		799	/* inject a fake call to Coro::State::_cctx_init into the execution */
		800	/* _cctx_init should be careful, as it could be called at almost any time */
		801	/* during execution of a perl program */
		802	static void NOINLINE
		803	prepare_cctx (pTHX_ coro_cctx *cctx)
		804	{
		805	dSP;
		806	LOGOP myop;
		807
		808	PL_top_env = &PL_start_env;
		809
		810	if (cctx->flags & CC_TRACE)
		811	PL_runops = runops_trace;
		812
		813	Zero (&myop, 1, LOGOP);
		814	myop.op_next = PL_op;
		815	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		816
		817	PUSHMARK (SP);
		818	EXTEND (SP, 2);
		819	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		820	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		821	PUTBACK;
		822	PL_op = (OP *)&myop;
		823	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		824	SPAGAIN;
		825	}
		826
		827	/*
		828	* this is a _very_ stripped down perl interpreter ;)
		829	*/
		830	static void
		831	coro_run (void *arg)
		832	{
645	dTHX;	833	dTHX;
646	dSP;
647	Coro__State ctx = (Coro__State)arg;
648	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
649		834
650	coro_init_stacks (aTHX);	835	/* coro_run is the alternative tail of transfer(), so unlock here. */
651	/*PL_curcop = 0;*/	836	UNLOCK;
652	/*PL_in_eval = PL_in_eval;*/ /* inherit */
653	SvREFCNT_dec (GvAV (PL_defgv));
654	GvAV (PL_defgv) = ctx->args; ctx->args = 0;
655		837
656	SPAGAIN;	838	/* we now skip the entersub that lead to transfer() */
		839	PL_op = PL_op->op_next;
657		840
658	if (ctx->stack)	841	/* inject a fake subroutine call to cctx_init */
659	{	842	prepare_cctx (aTHX_ (coro_cctx *)arg);
660	ctx->cursp = 0;
661		843
662	PUSHMARK(SP);	844	/* somebody or something will hit me for both perl_run and PL_restartop */
663	PUTBACK;	845	PL_restartop = PL_op;
664	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);	846	perl_run (PL_curinterp);
665		847
666	if (SvTRUE (ERRSV))	848	/*
667	croak (NULL);	849	* If perl-run returns we assume exit() was being called or the coro
668	else	850	* fell off the end, which seems to be the only valid (non-bug)
669	croak ("FATAL: CCTXT coroutine returned!");	851	* reason for perl_run to return. We try to exit by jumping to the
		852	* bootstrap-time "top" top_env, as we cannot restore the "main"
		853	* coroutine as Coro has no such concept
		854	*/
		855	PL_top_env = main_top_env;
		856	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		857	}
		858
		859	static coro_cctx *
		860	cctx_new ()
		861	{
		862	coro_cctx *cctx;
		863	void *stack_start;
		864	size_t stack_size;
		865
		866	++cctx_count;
		867
		868	Newz (0, cctx, 1, coro_cctx);
		869
		870	#if HAVE_MMAP
		871
		872	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		873	/* mmap supposedly does allocate-on-write for us */
		874	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		875
		876	if (cctx->sptr != (void *)-1)
		877	{
		878	# if CORO_STACKGUARD
		879	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		880	# endif
		881	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		882	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		883	cctx->flags |= CC_MAPPED;
670	}	884	}
671	else	885	else
672	{	886	#endif
673	UNOP myop;
674
675	PL_op = (OP *)&myop;
676
677	Zero(&myop, 1, UNOP);
678	myop.op_next = Nullop;
679	myop.op_flags = OPf_WANT_VOID;
680
681	PUSHMARK(SP);
682	XPUSHs (sub_init);
683	/*
684	* the next line is slightly wrong, as PL_op->op_next
685	* is actually being executed so we skip the first op.
686	* that doesn't matter, though, since it is only
687	* pp_nextstate and we never return...
688	* ah yes, and I don't care anyways ;)
689	*/
690	PUTBACK;
691	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
692	SPAGAIN;
693
694	ENTER; /* necessary e.g. for dounwind */
695	}	887	{
696	}	888	cctx->ssize = coro_stacksize * (long)sizeof (long);
		889	New (0, cctx->sptr, coro_stacksize, long);
697		890
698	static void	891	if (!cctx->sptr)
699	continue_coro (void *arg)	892	{
700	{	893	perror ("FATAL: unable to allocate stack for coroutine");
701	/*	894	_exit (EXIT_FAILURE);
702	* this is a _very_ stripped down perl interpreter ;)	895	}
703	*/
704	dTHX;
705	Coro__State ctx = (Coro__State)arg;
706	JMPENV coro_start_env;
707		896
708	PL_top_env = &ctx->start_env;	897	stack_start = cctx->sptr;
		898	stack_size = cctx->ssize;
		899	}
709		900
710	ctx->cursp = 0;	901	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
711	PL_op = PL_op->op_next;	902	coro_create (&cctx->cctx, coro_run, (void *)cctx, stack_start, stack_size);
712	CALLRUNOPS(aTHX);
713		903
714	abort ();	904	return cctx;
715	}	905	}
716		906
717	STATIC void	907	static void
		908	cctx_destroy (coro_cctx *cctx)
		909	{
		910	if (!cctx)
		911	return;
		912
		913	--cctx_count;
		914
		915	#if CORO_USE_VALGRIND
		916	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		917	#endif
		918
		919	#if HAVE_MMAP
		920	if (cctx->flags & CC_MAPPED)
		921	munmap (cctx->sptr, cctx->ssize);
		922	else
		923	#endif
		924	Safefree (cctx->sptr);
		925
		926	Safefree (cctx);
		927	}
		928
		929	static coro_cctx *
		930	cctx_get (pTHX)
		931	{
		932	while (cctx_first)
		933	{
		934	coro_cctx *cctx = cctx_first;
		935	cctx_first = cctx->next;
		936	--cctx_idle;
		937
		938	if (cctx->ssize >= coro_stacksize && !(cctx->flags & CC_NOREUSE))
		939	return cctx;
		940
		941	cctx_destroy (cctx);
		942	}
		943
		944	return cctx_new ();
		945	}
		946
		947	static void
		948	cctx_put (coro_cctx *cctx)
		949	{
		950	/* free another cctx if overlimit */
		951	if (cctx_idle >= MAX_IDLE_CCTX)
		952	{
		953	coro_cctx *first = cctx_first;
		954	cctx_first = first->next;
		955	--cctx_idle;
		956
		957	cctx_destroy (first);
		958	}
		959
		960	++cctx_idle;
		961	cctx->next = cctx_first;
		962	cctx_first = cctx;
		963	}
		964
		965	/** coroutine switching *****************************************************/
		966
		967	static void NOINLINE
		968	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		969	{
		970	if (prev != next)
		971	{
		972	if (!(prev->flags & (CF_RUNNING | CF_NEW)))
		973	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		974
		975	if (next->flags & CF_RUNNING)
		976	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		977
		978	if (next->flags & CF_DESTROYED)
		979	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		980
		981	if (PL_lex_state != LEX_NOTPARSING)
		982	croak ("Coro::State::transfer called while parsing, but this is not supported");
		983	}
		984	}
		985
		986	/* always use the TRANSFER macro */
		987	static void NOINLINE
718	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)	988	transfer (pTHX_ struct coro *prev, struct coro *next)
719	{	989	{
720	dSTACKLEVEL;	990	dSTACKLEVEL;
721		991
		992	/* sometimes transfer is only called to set idle_sp */
		993	if (!next)
		994	{
		995	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		996	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		997	}
722	if (prev != next)	998	else if (prev != next)
723	{	999	{
724	if (next->mainstack)	1000	coro_cctx *prev__cctx;
		1001
		1002	if (prev->flags & CF_NEW)
725	{	1003	{
726	LOCK;	1004	/* create a new empty context */
727	SAVE (prev, flags);	1005	Newz (0, prev->cctx, 1, coro_cctx);
728	LOAD (next);	1006	prev->flags &= ~CF_NEW;
729	UNLOCK;	1007	prev->flags |= CF_RUNNING;
730
731	/* mark this state as in-use */
732	next->mainstack = 0;
733	next->tmps_ix = -2;
734
735	/* stacklevel changed? if yes, grab the stack for us! */
736	if (flags & TRANSFER_SAVE_CCTXT)
737	{
738	if (!prev->stack)
739	allocate_stack (prev, 0);
740	else if (prev->cursp != stacklevel
741	&& prev->stack->usecnt > 1)
742	{
743	prev->gencnt = ++prev->stack->gencnt;
744	prev->stack->usecnt = 1;
745	}
746
747	/* has our stack been invalidated? */
748	if (next->stack && next->stack->gencnt != next->gencnt)
749	{
750	deallocate_stack (next);
751	allocate_stack (next, 1);
752	coro_create (&(next->stack->cctx),
753	continue_coro, (void *)next,
754	next->stack->sptr, labs (next->stack->ssize));
755	}
756
757	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
758	prev->cursp = stacklevel;
759	/* don't add any code here */
760	}
761	else
762	next->cursp = stacklevel;
763	}	1008	}
764	else if (next->tmps_ix == -2)	1009
765	croak ("tried to transfer to running coroutine");	1010	prev->flags &= ~CF_RUNNING;
		1011	next->flags |= CF_RUNNING;
		1012
		1013	LOCK;
		1014
		1015	if (next->flags & CF_NEW)
		1016	{
		1017	/* need to start coroutine */
		1018	next->flags &= ~CF_NEW;
		1019	/* first get rid of the old state */
		1020	save_perl (aTHX_ prev);
		1021	/* setup coroutine call */
		1022	setup_coro (aTHX_ next);
		1023	}
766	else	1024	else
767	{	1025	{
768	LOCK;	1026	/* coroutine already started */
769	SAVE (prev, -1); /* first get rid of the old state */	1027	save_perl (aTHX_ prev);
770	UNLOCK;	1028	load_perl (aTHX_ next);
771
772	if (flags & TRANSFER_SAVE_CCTXT)
773	{
774	if (!prev->stack)
775	allocate_stack (prev, 0);
776
777	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
778	{
779	PL_top_env = &next->start_env;
780
781	setup_coro (next);
782	next->cursp = stacklevel;
783
784	prev->stack->refcnt++;
785	prev->stack->usecnt++;
786	next->stack = prev->stack;
787	next->gencnt = prev->gencnt;
788	}
789	else
790	{
791	assert (!next->stack);
792	allocate_stack (next, 1);
793	coro_create (&(next->stack->cctx),
794	setup_coro, (void *)next,
795	next->stack->sptr, labs (next->stack->ssize));
796	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
797	prev->cursp = stacklevel;
798	/* don't add any code here */
799	}
800	}
801	else
802	{
803	setup_coro (next);
804	next->cursp = stacklevel;
805	}
806	}	1029	}
807	}
808		1030
809	LOCK;	1031	prev__cctx = prev->cctx;
810	if (coro_mortal)	1032
811	{	1033	/* possibly "free" the cctx */
812	SvREFCNT_dec (coro_mortal);	1034	if (prev__cctx->idle_sp == STACKLEVEL && !(prev__cctx->flags & CC_TRACE))
813	coro_mortal = 0;	1035	{
814	}	1036	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1037	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1038
		1039	prev->cctx = 0;
		1040
		1041	cctx_put (prev__cctx);
		1042	}
		1043
		1044	++next->usecount;
		1045
		1046	if (!next->cctx)
		1047	next->cctx = cctx_get (aTHX);
		1048
		1049	if (prev__cctx != next->cctx)
		1050	{
		1051	prev__cctx->top_env = PL_top_env;
		1052	PL_top_env = next->cctx->top_env;
		1053	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1054	}
		1055
		1056	free_coro_mortal (aTHX);
815	UNLOCK;	1057	UNLOCK;
		1058	}
816	}	1059	}
817		1060
818	#define SV_CORO(sv,func) \	1061	struct transfer_args
819	do { \	1062	{
820	if (SvROK (sv)) \	1063	struct coro *prev, *next;
821	sv = SvRV (sv); \	1064	};
822	\
823	if (SvTYPE (sv) == SVt_PVHV) \
824	{ \
825	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
826	\
827	if (!he) \
828	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
829	\
830	(sv) = SvRV (HeVAL(he)); \
831	} \
832	\
833	/* must also be changed inside Coro::Cont::yield */ \
834	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
835	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
836	\
837	} while(0)
838		1065
839	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1066	#define TRANSFER(ta) transfer (aTHX_ (ta).prev, (ta).next)
		1067	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
840		1068
		1069	/** high level stuff ********************************************************/
		1070
841	static void	1071	static int
		1072	coro_state_destroy (pTHX_ struct coro *coro)
		1073	{
		1074	if (coro->flags & CF_DESTROYED)
		1075	return 0;
		1076
		1077	coro->flags |= CF_DESTROYED;
		1078
		1079	if (coro->flags & CF_READY)
		1080	{
		1081	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1082	/* alternative: look through all ready queues and remove the coro */
		1083	LOCK;
		1084	--coro_nready;
		1085	UNLOCK;
		1086	}
		1087	else
		1088	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		1089
		1090	if (coro->mainstack && coro->mainstack != main_mainstack)
		1091	{
		1092	struct coro temp;
		1093
		1094	if (coro->flags & CF_RUNNING)
		1095	croak ("FATAL: tried to destroy currently running coroutine");
		1096
		1097	save_perl (aTHX_ &temp);
		1098	load_perl (aTHX_ coro);
		1099
		1100	destroy_coro (aTHX_ coro);
		1101
		1102	load_perl (aTHX_ &temp); /* this will get rid of defsv etc.. */
		1103
		1104	coro->mainstack = 0;
		1105	}
		1106
		1107	cctx_destroy (coro->cctx);
		1108	SvREFCNT_dec (coro->args);
		1109
		1110	if (coro->next) coro->next->prev = coro->prev;
		1111	if (coro->prev) coro->prev->next = coro->next;
		1112	if (coro == coro_first) coro_first = coro->next;
		1113
		1114	return 1;
		1115	}
		1116
		1117	static int
		1118	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1119	{
		1120	struct coro *coro = (struct coro *)mg->mg_ptr;
		1121	mg->mg_ptr = 0;
		1122
		1123	coro->hv = 0;
		1124
		1125	if (--coro->refcnt < 0)
		1126	{
		1127	coro_state_destroy (aTHX_ coro);
		1128	Safefree (coro);
		1129	}
		1130
		1131	return 0;
		1132	}
		1133
		1134	static int
		1135	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1136	{
		1137	struct coro *coro = (struct coro *)mg->mg_ptr;
		1138
		1139	++coro->refcnt;
		1140
		1141	return 0;
		1142	}
		1143
		1144	static MGVTBL coro_state_vtbl = {
		1145	0, 0, 0, 0,
		1146	coro_state_free,
		1147	0,
		1148	#ifdef MGf_DUP
		1149	coro_state_dup,
		1150	#else
		1151	# define MGf_DUP 0
		1152	#endif
		1153	};
		1154
		1155	static void
		1156	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1157	{
		1158	ta->prev = SvSTATE (prev_sv);
		1159	ta->next = SvSTATE (next_sv);
		1160	TRANSFER_CHECK (*ta);
		1161	}
		1162
		1163	static void
842	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1164	api_transfer (SV *prev_sv, SV *next_sv)
843	{	1165	{
844	SV_CORO (prev, "Coro::transfer");	1166	dTHX;
845	SV_CORO (next, "Coro::transfer");	1167	struct transfer_args ta;
846		1168
847	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1169	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1170	TRANSFER (ta);
848	}	1171	}
849		1172
850	/** Coro ********************************************************************/	1173	/** Coro ********************************************************************/
851		1174
852	#define PRIO_MAX 3
853	#define PRIO_HIGH 1
854	#define PRIO_NORMAL 0
855	#define PRIO_LOW -1
856	#define PRIO_IDLE -3
857	#define PRIO_MIN -4
858
859	/* for Coro.pm */
860	static GV *coro_current, *coro_idle;
861	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];
862	static int coro_nready;
863
864	static void	1175	static void
865	coro_enq (pTHX_ SV *sv)	1176	coro_enq (pTHX_ SV *coro_sv)
866	{	1177	{
867	if (SvTYPE (sv) == SVt_PVHV)
868	{
869	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);
870	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
871
872	prio = prio > PRIO_MAX ? PRIO_MAX
873	: prio < PRIO_MIN ? PRIO_MIN
874	: prio;
875
876	av_push (coro_ready [prio - PRIO_MIN], sv);	1178	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
877	coro_nready++;
878
879	return;
880	}
881
882	croak ("Coro::ready tried to enqueue something that is not a coroutine");
883	}	1179	}
884		1180
885	static SV *	1181	static SV *
886	coro_deq (pTHX_ int min_prio)	1182	coro_deq (pTHX_ int min_prio)
887	{	1183	{
…		…
890	min_prio -= PRIO_MIN;	1186	min_prio -= PRIO_MIN;
891	if (min_prio < 0)	1187	if (min_prio < 0)
892	min_prio = 0;	1188	min_prio = 0;
893		1189
894	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1190	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
895	if (av_len (coro_ready[prio]) >= 0)	1191	if (AvFILLp (coro_ready [prio]) >= 0)
896	{
897	coro_nready--;
898	return av_shift (coro_ready[prio]);	1192	return av_shift (coro_ready [prio]);
899	}
900		1193
901	return 0;	1194	return 0;
902	}	1195	}
903		1196
904	static void	1197	static int
905	api_ready (SV *coro)	1198	api_ready (SV *coro_sv)
906	{	1199	{
907	dTHX;	1200	dTHX;
		1201	struct coro *coro;
908		1202
909	if (SvROK (coro))	1203	if (SvROK (coro_sv))
910	coro = SvRV (coro);	1204	coro_sv = SvRV (coro_sv);
		1205
		1206	coro = SvSTATE (coro_sv);
		1207
		1208	if (coro->flags & CF_READY)
		1209	return 0;
		1210
		1211	coro->flags |= CF_READY;
911		1212
912	LOCK;	1213	LOCK;
913	coro_enq (aTHX_ SvREFCNT_inc (coro));	1214	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1215	++coro_nready;
914	UNLOCK;	1216	UNLOCK;
		1217
		1218	return 1;
		1219	}
		1220
		1221	static int
		1222	api_is_ready (SV *coro_sv)
		1223	{
		1224	dTHX;
		1225	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1226	}
		1227
		1228	static void
		1229	prepare_schedule (pTHX_ struct transfer_args *ta)
		1230	{
		1231	SV *prev_sv, *next_sv;
		1232
		1233	for (;;)
		1234	{
		1235	LOCK;
		1236	next_sv = coro_deq (aTHX_ PRIO_MIN);
		1237
		1238	/* nothing to schedule: call the idle handler */
		1239	if (!next_sv)
		1240	{
		1241	dSP;
		1242	UNLOCK;
		1243
		1244	ENTER;
		1245	SAVETMPS;
		1246
		1247	PUSHMARK (SP);
		1248	PUTBACK;
		1249	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1250
		1251	FREETMPS;
		1252	LEAVE;
		1253	continue;
		1254	}
		1255
		1256	ta->next = SvSTATE (next_sv);
		1257
		1258	/* cannot transfer to destroyed coros, skip and look for next */
		1259	if (ta->next->flags & CF_DESTROYED)
		1260	{
		1261	UNLOCK;
		1262	SvREFCNT_dec (next_sv);
		1263	/* coro_nready is already taken care of by destroy */
		1264	continue;
		1265	}
		1266
		1267	--coro_nready;
		1268	UNLOCK;
		1269	break;
		1270	}
		1271
		1272	/* free this only after the transfer */
		1273	prev_sv = SvRV (coro_current);
		1274	ta->prev = SvSTATE (prev_sv);
		1275	TRANSFER_CHECK (*ta);
		1276	assert (ta->next->flags & CF_READY);
		1277	ta->next->flags &= ~CF_READY;
		1278	SvRV_set (coro_current, next_sv);
		1279
		1280	LOCK;
		1281	free_coro_mortal (aTHX);
		1282	coro_mortal = prev_sv;
		1283	UNLOCK;
		1284	}
		1285
		1286	static void
		1287	prepare_cede (pTHX_ struct transfer_args *ta)
		1288	{
		1289	api_ready (coro_current);
		1290	prepare_schedule (aTHX_ ta);
		1291	}
		1292
		1293	static int
		1294	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1295	{
		1296	if (coro_nready)
		1297	{
		1298	SV *prev = SvRV (coro_current);
		1299	prepare_schedule (aTHX_ ta);
		1300	api_ready (prev);
		1301	return 1;
		1302	}
		1303	else
		1304	return 0;
915	}	1305	}
916		1306
917	static void	1307	static void
918	api_schedule (void)	1308	api_schedule (void)
919	{	1309	{
920	dTHX;	1310	dTHX;
		1311	struct transfer_args ta;
921		1312
922	SV *prev, *next;	1313	prepare_schedule (aTHX_ &ta);
923		1314	TRANSFER (ta);
924	LOCK;
925
926	prev = SvRV (GvSV (coro_current));
927	next = coro_deq (aTHX_ PRIO_MIN);
928
929	if (!next)
930	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
931
932	/* free this only after the transfer */
933	coro_mortal = prev;
934	SV_CORO (prev, "Coro::schedule");
935
936	SvRV (GvSV (coro_current)) = next;
937
938	SV_CORO (next, "Coro::schedule");
939
940	UNLOCK;
941
942	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
943	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
944	}	1315	}
945		1316
946	static void	1317	static int
947	api_cede (void)	1318	api_cede (void)
948	{	1319	{
949	dTHX;	1320	dTHX;
		1321	struct transfer_args ta;
950		1322
951	LOCK;	1323	prepare_cede (aTHX_ &ta);
952	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));
953	UNLOCK;
954		1324
955	api_schedule ();	1325	if (ta.prev != ta.next)
		1326	{
		1327	TRANSFER (ta);
		1328	return 1;
		1329	}
		1330	else
		1331	return 0;
956	}	1332	}
957		1333
		1334	static int
		1335	api_cede_notself (void)
		1336	{
		1337	dTHX;
		1338	struct transfer_args ta;
		1339
		1340	if (prepare_cede_notself (aTHX_ &ta))
		1341	{
		1342	TRANSFER (ta);
		1343	return 1;
		1344	}
		1345	else
		1346	return 0;
		1347	}
		1348
		1349	static void
		1350	api_trace (SV *coro_sv, int flags)
		1351	{
		1352	dTHX;
		1353	struct coro *coro = SvSTATE (coro_sv);
		1354
		1355	if (flags & CC_TRACE)
		1356	{
		1357	if (!coro->cctx)
		1358	coro->cctx = cctx_new ();
		1359	else if (!(coro->cctx->flags & CC_TRACE))
		1360	croak ("cannot enable tracing on coroutine with custom stack");
		1361
		1362	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1363	}
		1364	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1365	{
		1366	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1367
		1368	if (coro->flags & CF_RUNNING)
		1369	PL_runops = RUNOPS_DEFAULT;
		1370	else
		1371	coro->runops = RUNOPS_DEFAULT;
		1372	}
		1373	}
		1374
958	MODULE = Coro::State PACKAGE = Coro::State	1375	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
959		1376
960	PROTOTYPES: ENABLE	1377	PROTOTYPES: DISABLE
961		1378
962	BOOT:	1379	BOOT:
963	{ /* {} necessary for stoopid perl-5.6.x */	1380	{
964	#ifdef USE_ITHREADS	1381	#ifdef USE_ITHREADS
965	MUTEX_INIT (&coro_mutex);	1382	MUTEX_INIT (&coro_mutex);
966	#endif	1383	#endif
		1384	BOOT_PAGESIZE;
967		1385
968	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1386	irsgv = gv_fetchpv ("/", 1, SVt_PV);
969	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1387
970	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1388	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
971		1389
972	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1390	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
973	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1391	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
974	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1392	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
975	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1393	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
976		1394
977	main_mainstack = PL_mainstack;	1395	main_mainstack = PL_mainstack;
		1396	main_top_env = PL_top_env;
		1397
		1398	while (main_top_env->je_prev)
		1399	main_top_env = main_top_env->je_prev;
978		1400
979	coroapi.ver = CORO_API_VERSION;	1401	coroapi.ver = CORO_API_VERSION;
980	coroapi.transfer = api_transfer;	1402	coroapi.transfer = api_transfer;
981	}
982		1403
983	Coro::State	1404	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
984	_newprocess(args)	1405	}
985	SV * args	1406
986	PROTOTYPE: $	1407	SV *
		1408	new (char *klass, ...)
987	CODE:	1409	CODE:
988	Coro__State coro;	1410	{
		1411	struct coro *coro;
		1412	HV *hv;
		1413	int i;
989		1414
990	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
991	croak ("Coro::State::_newprocess expects an arrayref");
992
993	Newz (0, coro, 1, struct coro);	1415	Newz (0, coro, 1, struct coro);
		1416	coro->args = newAV ();
		1417	coro->flags = CF_NEW;
994		1418
995	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1419	if (coro_first) coro_first->prev = coro;
996	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1420	coro->next = coro_first;
997	/*coro->stack = 0;*/	1421	coro_first = coro;
998		1422
999	/* same as JMPENV_BOOTSTRAP */	1423	coro->hv = hv = newHV ();
1000	/* we might be able to recycle start_env, but safe is safe */	1424	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
1001	/*Zero(&coro->start_env, 1, JMPENV);*/	1425	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1002	coro->start_env.je_ret = -1;
1003	coro->start_env.je_mustcatch = TRUE;
1004		1426
1005	RETVAL = coro;	1427	for (i = 1; i < items; i++)
		1428	av_push (coro->args, newSVsv (ST (i)));
		1429	}
1006	OUTPUT:	1430	OUTPUT:
1007	RETVAL	1431	RETVAL
1008		1432
		1433	# these not obviously related functions are all rolled into the same xs
		1434	# function to increase chances that they all will call transfer with the same
		1435	# stack offset
1009	void	1436	void
1010	transfer(prev, next, flags)	1437	_set_stacklevel (...)
1011	SV *prev	1438	ALIAS:
1012	SV *next	1439	Coro::State::transfer = 1
1013	int flags	1440	Coro::schedule = 2
1014	PROTOTYPE: @	1441	Coro::cede = 3
		1442	Coro::cede_notself = 4
1015	CODE:	1443	CODE:
1016	PUTBACK;	1444	{
1017	SV_CORO (next, "Coro::transfer");	1445	struct transfer_args ta;
1018	SV_CORO (prev, "Coro::transfer");	1446
1019	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1447	switch (ix)
1020	SPAGAIN;	1448	{
		1449	case 0:
		1450	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1451	ta.next = 0;
		1452	break;
		1453
		1454	case 1:
		1455	if (items != 2)
		1456	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1457
		1458	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1459	break;
		1460
		1461	case 2:
		1462	prepare_schedule (aTHX_ &ta);
		1463	break;
		1464
		1465	case 3:
		1466	prepare_cede (aTHX_ &ta);
		1467	break;
		1468
		1469	case 4:
		1470	if (!prepare_cede_notself (aTHX_ &ta))
		1471	XSRETURN_EMPTY;
		1472
		1473	break;
		1474	}
		1475
		1476	BARRIER;
		1477	TRANSFER (ta);
		1478
		1479	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1480	XSRETURN_YES;
		1481	}
		1482
		1483	bool
		1484	_destroy (SV *coro_sv)
		1485	CODE:
		1486	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1487	OUTPUT:
		1488	RETVAL
1021		1489
1022	void	1490	void
1023	DESTROY(coro)
1024	Coro::State coro
1025	CODE:
1026
1027	if (coro->mainstack && coro->mainstack != main_mainstack)
1028	{
1029	struct coro temp;
1030
1031	PUTBACK;
1032	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1033	LOAD (aTHX_ coro);
1034	SPAGAIN;
1035
1036	destroy_stacks (aTHX);
1037
1038	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1039	SPAGAIN;
1040
1041	coro->mainstack = 0;
1042	}
1043
1044	deallocate_stack (coro);
1045	SvREFCNT_dec (coro->args);
1046	Safefree (coro);
1047
1048	void
1049	_exit(code)	1491	_exit (code)
1050	int code	1492	int code
1051	PROTOTYPE: $	1493	PROTOTYPE: $
1052	CODE:	1494	CODE:
1053	_exit (code);	1495	_exit (code);
1054		1496
1055	MODULE = Coro::State PACKAGE = Coro::Cont	1497	int
		1498	cctx_stacksize (int new_stacksize = 0)
		1499	CODE:
		1500	RETVAL = coro_stacksize;
		1501	if (new_stacksize)
		1502	coro_stacksize = new_stacksize;
		1503	OUTPUT:
		1504	RETVAL
1056		1505
1057	# this is slightly dirty (should expose a c-level api)	1506	int
		1507	cctx_count ()
		1508	CODE:
		1509	RETVAL = cctx_count;
		1510	OUTPUT:
		1511	RETVAL
		1512
		1513	int
		1514	cctx_idle ()
		1515	CODE:
		1516	RETVAL = cctx_idle;
		1517	OUTPUT:
		1518	RETVAL
1058		1519
1059	void	1520	void
1060	yield(...)	1521	list ()
1061	PROTOTYPE: @	1522	PPCODE:
		1523	{
		1524	struct coro *coro;
		1525	for (coro = coro_first; coro; coro = coro->next)
		1526	if (coro->hv)
		1527	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1528	}
		1529
		1530	void
		1531	call (Coro::State coro, SV *coderef)
		1532	ALIAS:
		1533	eval = 1
		1534	CODE:
		1535	{
		1536	if (coro->mainstack)
		1537	{
		1538	struct coro temp;
		1539	Zero (&temp, 1, struct coro);
		1540
		1541	if (!(coro->flags & CF_RUNNING))
		1542	{
		1543	save_perl (aTHX_ &temp);
		1544	load_perl (aTHX_ coro);
		1545	}
		1546
		1547	{
		1548	dSP;
		1549	ENTER;
		1550	SAVETMPS;
		1551	PUSHMARK (SP);
		1552	PUTBACK;
		1553	if (ix)
		1554	eval_sv (coderef, 0);
		1555	else
		1556	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1557	SPAGAIN;
		1558	FREETMPS;
		1559	LEAVE;
		1560	PUTBACK;
		1561	}
		1562
		1563	if (!(coro->flags & CF_RUNNING))
		1564	{
		1565	save_perl (aTHX_ coro);
		1566	load_perl (aTHX_ &temp);
		1567	}
		1568	}
		1569	}
		1570
		1571	SV *
		1572	is_ready (Coro::State coro)
		1573	PROTOTYPE: $
		1574	ALIAS:
		1575	is_ready = CF_READY
		1576	is_running = CF_RUNNING
		1577	is_new = CF_NEW
		1578	is_destroyed = CF_DESTROYED
		1579	CODE:
		1580	RETVAL = boolSV (coro->flags & ix);
		1581	OUTPUT:
		1582	RETVAL
		1583
		1584	void
		1585	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1586
		1587	SV *
		1588	has_stack (Coro::State coro)
		1589	PROTOTYPE: $
		1590	CODE:
		1591	RETVAL = boolSV (!!coro->cctx);
		1592	OUTPUT:
		1593	RETVAL
		1594
		1595	int
		1596	is_traced (Coro::State coro)
		1597	PROTOTYPE: $
		1598	CODE:
		1599	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1600	OUTPUT:
		1601	RETVAL
		1602
		1603	IV
		1604	rss (Coro::State coro)
		1605	PROTOTYPE: $
		1606	ALIAS:
		1607	usecount = 1
1062	CODE:	1608	CODE:
1063	SV *yieldstack;	1609	switch (ix)
1064	SV *sv;	1610	{
1065	AV *defav = GvAV (PL_defgv);	1611	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1066	struct coro *prev, *next;	1612	case 1: RETVAL = coro->usecount; break;
1067
1068	yieldstack = *hv_fetch (
1069	(HV *)SvRV (GvSV (coro_current)),
1070	"yieldstack", sizeof ("yieldstack") - 1,
1071	0	1613	}
1072	);	1614	OUTPUT:
		1615	RETVAL
1073		1616
1074	/* set up @_ -- ugly */
1075	av_clear (defav);
1076	av_fill (defav, items - 1);
1077	while (items--)
1078	av_store (defav, items, SvREFCNT_inc (ST(items)));
1079
1080	sv = av_pop ((AV *)SvRV (yieldstack));
1081	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1082	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1083	SvREFCNT_dec (sv);
1084
1085	transfer (aTHX_ prev, next, 0);
1086		1617
1087	MODULE = Coro::State PACKAGE = Coro	1618	MODULE = Coro::State PACKAGE = Coro
1088		1619
1089	# this is slightly dirty (should expose a c-level api)
1090
1091	BOOT:	1620	BOOT:
1092	{	1621	{
1093	int i;	1622	int i;
		1623
		1624	sv_pool_rss = get_sv ("Coro::POOL_RSS" , TRUE);
		1625	sv_pool_size = get_sv ("Coro::POOL_SIZE" , TRUE);
		1626	av_async_pool = get_av ("Coro::async_pool", TRUE);
		1627
		1628	coro_current = get_sv ("Coro::current", FALSE);
		1629	SvREADONLY_on (coro_current);
		1630
1094	HV *stash = gv_stashpv ("Coro", TRUE);	1631	coro_stash = gv_stashpv ("Coro", TRUE);
1095		1632
1096	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1633	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1097	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1634	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1098	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1635	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1099	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1636	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1100	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1637	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1101	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1638	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1102
1103	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1104	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1105		1639
1106	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1640	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1107	coro_ready[i] = newAV ();	1641	coro_ready[i] = newAV ();
1108		1642
1109	{	1643	{
1110	SV *sv = perl_get_sv("Coro::API", 1);	1644	SV *sv = perl_get_sv("Coro::API", 1);
1111		1645
1112	coroapi.schedule = api_schedule;	1646	coroapi.schedule = api_schedule;
1113	coroapi.cede = api_cede;	1647	coroapi.cede = api_cede;
		1648	coroapi.cede_notself = api_cede_notself;
1114	coroapi.ready = api_ready;	1649	coroapi.ready = api_ready;
		1650	coroapi.is_ready = api_is_ready;
1115	coroapi.nready = &coro_nready;	1651	coroapi.nready = &coro_nready;
1116	coroapi.current = coro_current;	1652	coroapi.current = coro_current;
1117		1653
1118	GCoroAPI = &coroapi;	1654	GCoroAPI = &coroapi;
1119	sv_setiv(sv, (IV)&coroapi);	1655	sv_setiv (sv, (IV)&coroapi);
1120	SvREADONLY_on(sv);	1656	SvREADONLY_on (sv);
1121	}	1657	}
1122	}	1658	}
1123		1659
1124	#if !PERL_MICRO
1125
1126	void	1660	void
1127	ready(self)	1661	_set_current (SV *current)
1128	SV * self
1129	PROTOTYPE: $	1662	PROTOTYPE: $
1130	CODE:	1663	CODE:
1131	api_ready (self);	1664	SvREFCNT_dec (SvRV (coro_current));
1132		1665	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1133	#endif
1134		1666
1135	int	1667	int
		1668	prio (Coro::State coro, int newprio = 0)
		1669	ALIAS:
		1670	nice = 1
		1671	CODE:
		1672	{
		1673	RETVAL = coro->prio;
		1674
		1675	if (items > 1)
		1676	{
		1677	if (ix)
		1678	newprio = coro->prio - newprio;
		1679
		1680	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1681	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1682
		1683	coro->prio = newprio;
		1684	}
		1685	}
		1686	OUTPUT:
		1687	RETVAL
		1688
		1689	SV *
		1690	ready (SV *self)
		1691	PROTOTYPE: $
		1692	CODE:
		1693	RETVAL = boolSV (api_ready (self));
		1694	OUTPUT:
		1695	RETVAL
		1696
		1697	int
1136	nready(...)	1698	nready (...)
1137	PROTOTYPE:	1699	PROTOTYPE:
1138	CODE:	1700	CODE:
1139	RETVAL = coro_nready;	1701	RETVAL = coro_nready;
1140	OUTPUT:	1702	OUTPUT:
1141	RETVAL	1703	RETVAL
1142		1704
		1705	# for async_pool speedup
1143	void	1706	void
1144	schedule(...)	1707	_pool_1 (SV *cb)
1145	PROTOTYPE:
1146	CODE:	1708	CODE:
1147	api_schedule ();	1709	{
		1710	int i, len;
		1711	HV *hv = (HV *)SvRV (coro_current);
		1712	AV *defav = GvAV (PL_defgv);
		1713	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1714	AV *invoke_av;
		1715
		1716	if (!invoke)
		1717	croak ("\3terminate\2\n");
		1718
		1719	hv_store (hv, "desc", sizeof ("desc") - 1,
		1720	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1721
		1722	invoke_av = (AV *)SvRV (invoke);
		1723	len = av_len (invoke_av);
		1724
		1725	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1726
		1727	if (len > 0)
		1728	{
		1729	av_fill (defav, len - 1);
		1730	for (i = 0; i < len; ++i)
		1731	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1732	}
		1733
		1734	SvREFCNT_dec (invoke);
		1735	}
1148		1736
1149	void	1737	void
1150	cede(...)	1738	_pool_2 (SV *cb)
1151	PROTOTYPE:
1152	CODE:	1739	CODE:
1153	api_cede ();	1740	{
		1741	struct coro *coro = SvSTATE (coro_current);
1154		1742
		1743	sv_setsv (cb, &PL_sv_undef);
		1744
		1745	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1746	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1747	croak ("\3terminate\2\n");
		1748
		1749	av_clear (GvAV (PL_defgv));
		1750	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1751	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1752
		1753	coro->prio = 0;
		1754
		1755	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		1756	api_trace (coro_current, 0);
		1757
		1758	av_push (av_async_pool, newSVsv (coro_current));
		1759	}
		1760
		1761
		1762	MODULE = Coro::State PACKAGE = Coro::AIO
		1763
		1764	SV *
		1765	_get_state ()
		1766	CODE:
		1767	{
		1768	struct io_state *data;
		1769
		1770	RETVAL = newSV (sizeof (struct io_state));
		1771	data = (struct io_state *)SvPVX (RETVAL);
		1772	SvCUR_set (RETVAL, sizeof (struct io_state));
		1773	SvPOK_only (RETVAL);
		1774
		1775	data->errorno = errno;
		1776	data->laststype = PL_laststype;
		1777	data->laststatval = PL_laststatval;
		1778	data->statcache = PL_statcache;
		1779	}
		1780	OUTPUT:
		1781	RETVAL
		1782
		1783	void
		1784	_set_state (char *data_)
		1785	PROTOTYPE: $
		1786	CODE:
		1787	{
		1788	struct io_state *data = (void *)data_;
		1789
		1790	errno = data->errorno;
		1791	PL_laststype = data->laststype;
		1792	PL_laststatval = data->laststatval;
		1793	PL_statcache = data->statcache;
		1794	}
		1795

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