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Comparing Coro/Coro/State.xs (file contents):
Revision 1.72 by root, Wed Feb 1 23:59:41 2006 UTC vs.
Revision 1.184 by root, Thu Oct 4 13:45:56 2007 UTC

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

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