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Comparing Coro/Coro/State.xs (file contents):
Revision 1.58 by pcg, Fri May 14 13:25:09 2004 UTC vs.
Revision 1.188 by root, Fri Oct 5 20:36:31 2007 UTC

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

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