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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.69 by root, Fri Dec 16 01:33:20 2005 UTC vs.
Revision 1.232 by root, Thu Apr 24 12:40:38 2008 UTC

		1	#include "libcoro/coro.c"
		2
1	#define PERL_NO_GET_CONTEXT	3	#define PERL_NO_GET_CONTEXT
2		4	#define PERL_EXT
3	#include "libcoro/coro.c"
4		5
5	#include "EXTERN.h"	6	#include "EXTERN.h"
6	#include "perl.h"	7	#include "perl.h"
7	#include "XSUB.h"	8	#include "XSUB.h"
8		9
9	#include "patchlevel.h"	10	#include "patchlevel.h"
10		11
11	#if PERL_VERSION < 6	12	#include <stdio.h>
		13	#include <errno.h>
		14	#include <assert.h>
		15
		16	#ifdef WIN32
		17	# undef setjmp
		18	# undef longjmp
		19	# undef _exit
		20	# define setjmp _setjmp // deep magic, don't ask
		21	#else
		22	# include <inttypes.h> /* most portable stdint.h */
		23	#endif
		24
		25	#ifdef HAVE_MMAP
		26	# include <unistd.h>
		27	# include <sys/mman.h>
		28	# ifndef MAP_ANONYMOUS
		29	# ifdef MAP_ANON
		30	# define MAP_ANONYMOUS MAP_ANON
		31	# else
		32	# undef HAVE_MMAP
		33	# endif
		34	# endif
		35	# include <limits.h>
		36	# ifndef PAGESIZE
		37	# define PAGESIZE pagesize
		38	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		39	static long pagesize;
		40	# else
		41	# define BOOT_PAGESIZE (void)0
		42	# endif
		43	#else
		44	# define PAGESIZE 0
		45	# define BOOT_PAGESIZE (void)0
		46	#endif
		47
		48	#if CORO_USE_VALGRIND
		49	# include <valgrind/valgrind.h>
		50	# define REGISTER_STACK(cctx,start,end) (cctx)->valgrind_id = VALGRIND_STACK_REGISTER ((start), (end))
		51	#else
		52	# define REGISTER_STACK(cctx,start,end)
		53	#endif
		54
		55	/* the maximum number of idle cctx that will be pooled */
		56	#define MAX_IDLE_CCTX 8
		57
		58	#define PERL_VERSION_ATLEAST(a,b,c) \
		59	(PERL_REVISION > (a) \
		60	|| (PERL_REVISION == (a) \
		61	&& (PERL_VERSION > (b) \
		62	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		63
		64	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	65	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	66	# define PL_ppaddr ppaddr
14	# endif	67	# endif
15	# ifndef call_sv	68	# ifndef call_sv
16	# define call_sv perl_call_sv	69	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	80	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	81	# define IS_PADCONST(v) 0
29	# endif	82	# endif
30	#endif	83	#endif
31		84
32	#include <signal.h>	85	/* 5.8.8 */
33		86	#ifndef GV_NOTQUAL
34	#ifdef HAVE_MMAP	87	# define GV_NOTQUAL 0
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	88	#endif
		89	#ifndef newSV
		90	# define newSV(l) NEWSV(0,l)
44	#endif	91	#endif
45		92
46	#define SUB_INIT "Coro::State::initialize"	93	/* 5.11 */
47	#define UCORO_STATE "_coro_state"	94	#ifndef CxHASARGS
		95	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		96	#endif
48		97
49	/* The next macro should declare a variable stacklevel that contains and approximation	98	/* 5.8.7 */
50	* to the current C stack pointer. Its property is that it changes with each call	99	#ifndef SvRV_set
51	* and should be unique. */	100	# define SvRV_set(s,v) SvRV(s) = (v)
		101	#endif
		102
		103	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		104	# undef CORO_STACKGUARD
		105	#endif
		106
		107	#ifndef CORO_STACKGUARD
		108	# define CORO_STACKGUARD 0
		109	#endif
		110
		111	/* prefer perl internal functions over our own? */
		112	#ifndef CORO_PREFER_PERL_FUNCTIONS
		113	# define CORO_PREFER_PERL_FUNCTIONS 0
		114	#endif
		115
		116	/* The next macros try to return the current stack pointer, in an as
		117	* portable way as possible. */
		118	#define dSTACKLEVEL volatile char stacklevel
52	#define dSTACKLEVEL void *stacklevel = &stacklevel	119	#define STACKLEVEL ((void *)&stacklevel)
53		120
54	#define IN_DESTRUCT (PL_main_cv == Nullcv)	121	#define IN_DESTRUCT (PL_main_cv == Nullcv)
55		122
56	#define labs(l) ((l) >= 0 ? (l) : -(l))	123	#if __GNUC__ >= 3
		124	# define attribute(x) __attribute__(x)
		125	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		126	# define expect(expr,value) __builtin_expect ((expr),(value))
		127	#else
		128	# define attribute(x)
		129	# define BARRIER
		130	# define expect(expr,value) (expr)
		131	#endif
		132
		133	#define expect_false(expr) expect ((expr) != 0, 0)
		134	#define expect_true(expr) expect ((expr) != 0, 1)
		135
		136	#define NOINLINE attribute ((noinline))
57		137
58	#include "CoroAPI.h"	138	#include "CoroAPI.h"
59		139
60	#ifdef USE_ITHREADS	140	#ifdef USE_ITHREADS
61	static perl_mutex coro_mutex;	141	static perl_mutex coro_mutex;
…		…
64	#else	144	#else
65	# define LOCK (void)0	145	# define LOCK (void)0
66	# define UNLOCK (void)0	146	# define UNLOCK (void)0
67	#endif	147	#endif
68		148
		149	/* helper storage struct for Coro::AIO */
		150	struct io_state
		151	{
		152	int errorno;
		153	I32 laststype;
		154	int laststatval;
		155	Stat_t statcache;
		156	};
		157
		158	static size_t coro_stacksize = CORO_STACKSIZE;
69	static struct CoroAPI coroapi;	159	static struct CoroAPI coroapi;
70	static AV *main_mainstack; /* used to differentiate between $main and others */	160	static AV *main_mainstack; /* used to differentiate between $main and others */
		161	static JMPENV *main_top_env;
71	static HV *coro_state_stash;	162	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 */	163	static volatile SV *coro_mortal; /* will be freed after next transfer */
75		164
76	/* this is actually not only the c stack but also c registers etc... */	165	static GV *irsgv; /* $/ */
		166	static GV *stdoutgv; /* *STDOUT */
		167	static SV *rv_diehook;
		168	static SV *rv_warnhook;
		169	static HV *hv_sig; /* %SIG */
		170
		171	/* async_pool helper stuff */
		172	static SV *sv_pool_rss;
		173	static SV *sv_pool_size;
		174	static AV *av_async_pool;
		175
		176	static struct coro_cctx *cctx_first;
		177	static int cctx_count, cctx_idle;
		178
		179	enum {
		180	CC_MAPPED = 0x01,
		181	CC_NOREUSE = 0x02, /* throw this away after tracing */
		182	CC_TRACE = 0x04,
		183	CC_TRACE_SUB = 0x08, /* trace sub calls */
		184	CC_TRACE_LINE = 0x10, /* trace each statement */
		185	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		186	};
		187
		188	/* this is a structure representing a c-level coroutine */
		189	typedef struct coro_cctx {
		190	struct coro_cctx *next;
		191
		192	/* the stack */
		193	void *sptr;
		194	size_t ssize;
		195
		196	/* cpu state */
		197	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		198	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		199	JMPENV *top_env;
		200	coro_context cctx;
		201
		202	#if CORO_USE_VALGRIND
		203	int valgrind_id;
		204	#endif
		205	unsigned char flags;
		206	} coro_cctx;
		207
		208	enum {
		209	CF_RUNNING = 0x0001, /* coroutine is running */
		210	CF_READY = 0x0002, /* coroutine is ready */
		211	CF_NEW = 0x0004, /* has never been switched to */
		212	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		213	};
		214
		215	/* the structure where most of the perl state is stored, overlaid on the cxstack */
77	typedef struct {	216	typedef struct {
78	int refcnt; /* pointer reference counter */	217	SV *defsv;
79	int usecnt; /* shared by how many coroutines */	218	AV *defav;
80	int gencnt; /* generation counter */	219	SV *errsv;
		220	SV *irsgv;
		221	#define VAR(name,type) type name;
		222	# include "state.h"
		223	#undef VAR
		224	} perl_slots;
81		225
82	coro_context cctx;	226	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
83		227
84	void *sptr;	228	/* this is a structure representing a perl-level coroutine */
85	long ssize; /* positive == mmap, otherwise malloc */
86	} coro_stack;
87
88	struct coro {	229	struct coro {
89	/* the top-level JMPENV for each coroutine, needed to catch dies. */	230	/* the c coroutine allocated to this perl coroutine, if any */
90	JMPENV start_env;	231	coro_cctx *cctx;
91		232
92	/* the optional C context */	233	/* process data */
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;	234	AV *mainstack;
110	SV **stack_sp;	235	perl_slots *slot; /* basically the saved sp */
111	OP *op;
112	SV **curpad;
113	AV *comppad;
114	CV *compcv;
115	SV **stack_base;
116	SV **stack_max;
117	SV **tmps_stack;
118	I32 tmps_floor;
119	I32 tmps_ix;
120	I32 tmps_max;
121	I32 *markstack;
122	I32 *markstack_ptr;
123	I32 *markstack_max;
124	I32 *scopestack;
125	I32 scopestack_ix;
126	I32 scopestack_max;
127	ANY *savestack;
128	I32 savestack_ix;
129	I32 savestack_max;
130	OP **retstack;
131	I32 retstack_ix;
132	I32 retstack_max;
133	PMOP *curpm;
134	COP *curcop;
135	JMPENV *top_env;
136		236
137	/* data associated with this coroutine (initial args) */	237	AV *args; /* data associated with this coroutine (initial args) */
138	AV *args;	238	int refcnt; /* coroutines are refcounted, yes */
		239	int flags; /* CF_ flags */
		240	HV *hv; /* the perl hash associated with this coro, if any */
		241
		242	/* statistics */
		243	int usecount; /* number of transfers to this coro */
		244
		245	/* coro process data */
		246	int prio;
		247	SV *throw; /* exception to be thrown */
		248
		249	/* async_pool */
		250	SV *saved_deffh;
		251
		252	/* linked list */
		253	struct coro *next, *prev;
139	};	254	};
140		255
141	typedef struct coro *Coro__State;	256	typedef struct coro *Coro__State;
142	typedef struct coro *Coro__State_or_hashref;	257	typedef struct coro *Coro__State_or_hashref;
143		258
144	/* mostly copied from op.c:cv_clone2 */	259	/** Coro ********************************************************************/
145	STATIC AV *	260
146	clone_padlist (pTHX_ AV *protopadlist)	261	#define PRIO_MAX 3
		262	#define PRIO_HIGH 1
		263	#define PRIO_NORMAL 0
		264	#define PRIO_LOW -1
		265	#define PRIO_IDLE -3
		266	#define PRIO_MIN -4
		267
		268	/* for Coro.pm */
		269	static SV *coro_current;
		270	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		271	static int coro_nready;
		272	static struct coro *coro_first;
		273
		274	/** lowlevel stuff **********************************************************/
		275
		276	static SV *
		277	coro_get_sv (pTHX_ const char *name, int create)
147	{	278	{
148	AV *av;	279	#if PERL_VERSION_ATLEAST (5,10,0)
149	I32 ix;	280	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
150	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);	281	get_sv (name, create);
151	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);	282	#endif
152	SV **pname = AvARRAY (protopad_name);	283	return get_sv (name, create);
153	SV **ppad = AvARRAY (protopad);	284	}
154	I32 fname = AvFILLp (protopad_name);	285
155	I32 fpad = AvFILLp (protopad);	286	static AV *
		287	coro_get_av (pTHX_ const char *name, int create)
		288	{
		289	#if PERL_VERSION_ATLEAST (5,10,0)
		290	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		291	get_av (name, create);
		292	#endif
		293	return get_av (name, create);
		294	}
		295
		296	static HV *
		297	coro_get_hv (pTHX_ const char *name, int create)
		298	{
		299	#if PERL_VERSION_ATLEAST (5,10,0)
		300	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		301	get_hv (name, create);
		302	#endif
		303	return get_hv (name, create);
		304	}
		305
		306	static AV *
		307	coro_clone_padlist (pTHX_ CV *cv)
		308	{
		309	AV *padlist = CvPADLIST (cv);
156	AV *newpadlist, *newpad_name, *newpad;	310	AV *newpadlist, *newpad;
157	SV **npad;
158
159	newpad_name = newAV ();
160	for (ix = fname; ix >= 0; ix--)
161	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
162
163	newpad = newAV ();
164	av_fill (newpad, AvFILLp (protopad));
165	npad = AvARRAY (newpad);
166		311
167	newpadlist = newAV ();	312	newpadlist = newAV ();
168	AvREAL_off (newpadlist);	313	AvREAL_off (newpadlist);
169	av_store (newpadlist, 0, (SV *) newpad_name);	314	#if PERL_VERSION_ATLEAST (5,10,0)
		315	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		316	#else
		317	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		318	#endif
		319	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		320	--AvFILLp (padlist);
		321
		322	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
170	av_store (newpadlist, 1, (SV *) newpad);	323	av_store (newpadlist, 1, (SV *)newpad);
171
172	av = newAV (); /* will be @_ */
173	av_extend (av, 0);
174	av_store (newpad, 0, (SV *) av);
175	AvFLAGS (av) = AVf_REIFY;
176
177	for (ix = fpad; ix > 0; ix--)
178	{
179	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;
180
181	if (namesv && namesv != &PL_sv_undef)
182	{
183	char *name = SvPVX (namesv); /* XXX */
184
185	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')
186	{ /* lexical from outside? */
187	npad[ix] = SvREFCNT_inc (ppad[ix]);
188	}
189	else
190	{ /* our own lexical */
191	SV *sv;
192	if (*name == '&')
193	sv = SvREFCNT_inc (ppad[ix]);
194	else if (*name == '@')
195	sv = (SV *) newAV ();
196	else if (*name == '%')
197	sv = (SV *) newHV ();
198	else
199	sv = NEWSV (0, 0);
200
201	#ifdef SvPADBUSY
202	if (!SvPADBUSY (sv))
203	#endif
204	SvPADMY_on (sv);
205
206	npad[ix] = sv;
207	}
208	}
209	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
210	{
211	npad[ix] = SvREFCNT_inc (ppad[ix]);
212	}
213	else
214	{
215	SV *sv = NEWSV (0, 0);
216	SvPADTMP_on (sv);
217	npad[ix] = sv;
218	}
219	}
220
221	#if 0 /* return -ENOTUNDERSTOOD */
222	/* Now that vars are all in place, clone nested closures. */
223
224	for (ix = fpad; ix > 0; ix--) {
225	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
226	if (namesv
227	&& namesv != &PL_sv_undef
228	&& !(SvFLAGS(namesv) & SVf_FAKE)
229	&& *SvPVX(namesv) == '&'
230	&& CvCLONE(ppad[ix]))
231	{
232	CV *kid = cv_clone((CV*)ppad[ix]);
233	SvREFCNT_dec(ppad[ix]);
234	CvCLONE_on(kid);
235	SvPADMY_on(kid);
236	npad[ix] = (SV*)kid;
237	}
238	}
239	#endif
240		324
241	return newpadlist;	325	return newpadlist;
242	}	326	}
243		327
244	STATIC void	328	static void
245	free_padlist (pTHX_ AV *padlist)	329	free_padlist (pTHX_ AV *padlist)
246	{	330	{
247	/* may be during global destruction */	331	/* may be during global destruction */
248	if (SvREFCNT (padlist))	332	if (SvREFCNT (padlist))
249	{	333	{
…		…
263		347
264	SvREFCNT_dec ((SV*)padlist);	348	SvREFCNT_dec ((SV*)padlist);
265	}	349	}
266	}	350	}
267		351
268	STATIC int	352	static int
269	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)	353	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
270	{	354	{
271	AV *padlist;	355	AV *padlist;
272	AV *av = (AV *)mg->mg_obj;	356	AV *av = (AV *)mg->mg_obj;
273		357
274	/* casting is fun. */	358	/* casting is fun. */
275	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	359	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
276	free_padlist (aTHX_ padlist);	360	free_padlist (aTHX_ padlist);
277		361
278	SvREFCNT_dec (av);	362	return 0;
279	}	363	}
280		364
281	#define PERL_MAGIC_coro PERL_MAGIC_ext	365	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		366	#define CORO_MAGIC_type_state PERL_MAGIC_ext
282		367
283	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	368	static MGVTBL coro_cv_vtbl = {
		369	0, 0, 0, 0,
		370	coro_cv_free
		371	};
		372
		373	#define CORO_MAGIC(sv,type) \
		374	SvMAGIC (sv) \
		375	? SvMAGIC (sv)->mg_type == type \
		376	? SvMAGIC (sv) \
		377	: mg_find (sv, type) \
		378	: 0
		379
		380	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		381	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		382
		383	static struct coro *
		384	SvSTATE_ (pTHX_ SV *coro)
		385	{
		386	HV *stash;
		387	MAGIC *mg;
		388
		389	if (SvROK (coro))
		390	coro = SvRV (coro);
		391
		392	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		393	croak ("Coro::State object required");
		394
		395	stash = SvSTASH (coro);
		396	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		397	{
		398	/* very slow, but rare, check */
		399	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		400	croak ("Coro::State object required");
		401	}
		402
		403	mg = CORO_MAGIC_state (coro);
		404	return (struct coro *)mg->mg_ptr;
		405	}
		406
		407	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
284		408
285	/* the next two functions merely cache the padlists */	409	/* the next two functions merely cache the padlists */
286	STATIC void	410	static void
287	get_padlist (pTHX_ CV *cv)	411	get_padlist (pTHX_ CV *cv)
288	{	412	{
289	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	413	MAGIC *mg = CORO_MAGIC_cv (cv);
		414	AV *av;
290		415
291	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	416	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
292	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	417	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
293	else	418	else
		419	{
		420	#if CORO_PREFER_PERL_FUNCTIONS
		421	/* this is probably cleaner, but also slower? */
		422	CV *cp = Perl_cv_clone (cv);
		423	CvPADLIST (cv) = CvPADLIST (cp);
		424	CvPADLIST (cp) = 0;
		425	SvREFCNT_dec (cp);
		426	#else
294	CvPADLIST (cv) = clone_padlist (aTHX_ CvPADLIST (cv));	427	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
		428	#endif
		429	}
295	}	430	}
296		431
297	STATIC void	432	static void
298	put_padlist (pTHX_ CV *cv)	433	put_padlist (pTHX_ CV *cv)
299	{	434	{
300	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	435	MAGIC *mg = CORO_MAGIC_cv (cv);
		436	AV *av;
301		437
302	if (!mg)	438	if (expect_false (!mg))
303	{	439	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
304	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
305	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
306	mg->mg_virtual = &vtbl_coro;
307	mg->mg_obj = (SV *)newAV ();
308	}
309		440
310	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	441	av = (AV *)mg->mg_obj;
311	}
312		442
313	#define SB do {	443	if (expect_false (AvFILLp (av) >= AvMAX (av)))
314	#define SE } while (0)	444	av_extend (av, AvMAX (av) + 1);
315		445
316	#define LOAD(state) load_state(aTHX_ (state));	446	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
317	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	447	}
318		448
319	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	449	/** load & save, init *******************************************************/
320		450
321	static void	451	static void
322	load_state(pTHX_ Coro__State c)	452	load_perl (pTHX_ Coro__State c)
323	{	453	{
324	PL_dowarn = c->dowarn;	454	perl_slots *slot = c->slot;
325	PL_in_eval = c->in_eval;	455	c->slot = 0;
326		456
327	PL_curstackinfo = c->curstackinfo;
328	PL_curstack = c->curstack;
329	PL_mainstack = c->mainstack;	457	PL_mainstack = c->mainstack;
330	PL_stack_sp = c->stack_sp;
331	PL_op = c->op;
332	PL_curpad = c->curpad;
333	PL_comppad = c->comppad;
334	PL_compcv = c->compcv;
335	PL_stack_base = c->stack_base;
336	PL_stack_max = c->stack_max;
337	PL_tmps_stack = c->tmps_stack;
338	PL_tmps_floor = c->tmps_floor;
339	PL_tmps_ix = c->tmps_ix;
340	PL_tmps_max = c->tmps_max;
341	PL_markstack = c->markstack;
342	PL_markstack_ptr = c->markstack_ptr;
343	PL_markstack_max = c->markstack_max;
344	PL_scopestack = c->scopestack;
345	PL_scopestack_ix = c->scopestack_ix;
346	PL_scopestack_max = c->scopestack_max;
347	PL_savestack = c->savestack;
348	PL_savestack_ix = c->savestack_ix;
349	PL_savestack_max = c->savestack_max;
350	PL_retstack = c->retstack;
351	PL_retstack_ix = c->retstack_ix;
352	PL_retstack_max = c->retstack_max;
353	PL_curpm = c->curpm;
354	PL_curcop = c->curcop;
355	PL_top_env = c->top_env;
356		458
357	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	459	GvSV (PL_defgv) = slot->defsv;
358	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	460	GvAV (PL_defgv) = slot->defav;
359	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	461	GvSV (PL_errgv) = slot->errsv;
		462	GvSV (irsgv) = slot->irsgv;
		463
		464	#define VAR(name,type) PL_ ## name = slot->name;
		465	# include "state.h"
		466	#undef VAR
360		467
361	{	468	{
362	dSP;	469	dSP;
		470
363	CV *cv;	471	CV *cv;
364		472
365	/* now do the ugly restore mess */	473	/* now do the ugly restore mess */
366	while ((cv = (CV *)POPs))	474	while (expect_true (cv = (CV *)POPs))
367	{	475	{
368	AV *padlist = (AV *)POPs;
369
370	if (padlist)
371	{
372	put_padlist (aTHX_ cv); /* mark this padlist as available */	476	put_padlist (aTHX_ cv); /* mark this padlist as available */
373	CvPADLIST(cv) = padlist;	477	CvDEPTH (cv) = PTR2IV (POPs);
374	}	478	CvPADLIST (cv) = (AV *)POPs;
375
376	++CvDEPTH(cv);
377	}	479	}
378		480
379	PUTBACK;	481	PUTBACK;
380	}	482	}
381	}	483	}
382		484
383	static void	485	static void
384	save_state(pTHX_ Coro__State c, int flags)	486	save_perl (pTHX_ Coro__State c)
385	{	487	{
386	{	488	{
387	dSP;	489	dSP;
388	I32 cxix = cxstack_ix;	490	I32 cxix = cxstack_ix;
389	PERL_CONTEXT *ccstk = cxstack;	491	PERL_CONTEXT *ccstk = cxstack;
…		…
392	/*	494	/*
393	* the worst thing you can imagine happens first - we have to save	495	* the worst thing you can imagine happens first - we have to save
394	* (and reinitialize) all cv's in the whole callchain :(	496	* (and reinitialize) all cv's in the whole callchain :(
395	*/	497	*/
396		498
397	PUSHs (Nullsv);	499	XPUSHs (Nullsv);
398	/* this loop was inspired by pp_caller */	500	/* this loop was inspired by pp_caller */
399	for (;;)	501	for (;;)
400	{	502	{
401	while (cxix >= 0)	503	while (expect_true (cxix >= 0))
402	{	504	{
403	PERL_CONTEXT *cx = &ccstk[cxix--];	505	PERL_CONTEXT *cx = &ccstk[cxix--];
404		506
405	if (CxTYPE(cx) == CXt_SUB)	507	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
406	{	508	{
407	CV *cv = cx->blk_sub.cv;	509	CV *cv = cx->blk_sub.cv;
		510
408	if (CvDEPTH(cv))	511	if (expect_true (CvDEPTH (cv)))
409	{	512	{
410	EXTEND (SP, CvDEPTH(cv)*2);	513	EXTEND (SP, 3);
411
412	while (--CvDEPTH(cv))
413	{
414	/* this tells the restore code to increment CvDEPTH */
415	PUSHs (Nullsv);
416	PUSHs ((SV *)cv);
417	}
418
419	PUSHs ((SV *)CvPADLIST(cv));	514	PUSHs ((SV *)CvPADLIST (cv));
		515	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
420	PUSHs ((SV *)cv);	516	PUSHs ((SV *)cv);
421		517
		518	CvDEPTH (cv) = 0;
422	get_padlist (aTHX_ cv); /* this is a monster */	519	get_padlist (aTHX_ cv);
423	}	520	}
424	}	521	}
425	#ifdef CXt_FORMAT
426	else if (CxTYPE(cx) == CXt_FORMAT)
427	{
428	/* I never used formats, so how should I know how these are implemented? */
429	/* my bold guess is as a simple, plain sub... */
430	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
431	}
432	#endif
433	}	522	}
434		523
435	if (top_si->si_type == PERLSI_MAIN)	524	if (expect_true (top_si->si_type == PERLSI_MAIN))
436	break;	525	break;
437		526
438	top_si = top_si->si_prev;	527	top_si = top_si->si_prev;
439	ccstk = top_si->si_cxstack;	528	ccstk = top_si->si_cxstack;
440	cxix = top_si->si_cxix;	529	cxix = top_si->si_cxix;
441	}	530	}
442		531
443	PUTBACK;	532	PUTBACK;
444	}	533	}
445		534
446	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	535	/* allocate some space on the context stack for our purposes */
447	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	536	/* we manually unroll here, as usually 2 slots is enough */
448	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	537	if (SLOT_COUNT >= 1) CXINC;
		538	if (SLOT_COUNT >= 2) CXINC;
		539	if (SLOT_COUNT >= 3) CXINC;
		540	{
		541	int i;
		542	for (i = 3; i < SLOT_COUNT; ++i)
		543	CXINC;
		544	}
		545	cxstack_ix -= SLOT_COUNT; /* undo allocation */
449		546
450	c->dowarn = PL_dowarn;
451	c->in_eval = PL_in_eval;
452
453	c->curstackinfo = PL_curstackinfo;
454	c->curstack = PL_curstack;
455	c->mainstack = PL_mainstack;	547	c->mainstack = PL_mainstack;
456	c->stack_sp = PL_stack_sp;	548
457	c->op = PL_op;	549	{
458	c->curpad = PL_curpad;	550	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
459	c->comppad = PL_comppad;	551
460	c->compcv = PL_compcv;	552	slot->defav = GvAV (PL_defgv);
461	c->stack_base = PL_stack_base;	553	slot->defsv = DEFSV;
462	c->stack_max = PL_stack_max;	554	slot->errsv = ERRSV;
463	c->tmps_stack = PL_tmps_stack;	555	slot->irsgv = GvSV (irsgv);
464	c->tmps_floor = PL_tmps_floor;	556
465	c->tmps_ix = PL_tmps_ix;	557	#define VAR(name,type) slot->name = PL_ ## name;
466	c->tmps_max = PL_tmps_max;	558	# include "state.h"
467	c->markstack = PL_markstack;	559	#undef VAR
468	c->markstack_ptr = PL_markstack_ptr;	560	}
469	c->markstack_max = PL_markstack_max;
470	c->scopestack = PL_scopestack;
471	c->scopestack_ix = PL_scopestack_ix;
472	c->scopestack_max = PL_scopestack_max;
473	c->savestack = PL_savestack;
474	c->savestack_ix = PL_savestack_ix;
475	c->savestack_max = PL_savestack_max;
476	c->retstack = PL_retstack;
477	c->retstack_ix = PL_retstack_ix;
478	c->retstack_max = PL_retstack_max;
479	c->curpm = PL_curpm;
480	c->curcop = PL_curcop;
481	c->top_env = PL_top_env;
482	}	561	}
483		562
484	/*	563	/*
485	* allocate various perl stacks. This is an exact copy	564	* allocate various perl stacks. This is an exact copy
486	* of perl.c:init_stacks, except that it uses less memory	565	* of perl.c:init_stacks, except that it uses less memory
487	* on the (sometimes correct) assumption that coroutines do	566	* on the (sometimes correct) assumption that coroutines do
488	* not usually need a lot of stackspace.	567	* not usually need a lot of stackspace.
489	*/	568	*/
490	STATIC void	569	#if CORO_PREFER_PERL_FUNCTIONS
		570	# define coro_init_stacks init_stacks
		571	#else
		572	static void
491	coro_init_stacks (pTHX)	573	coro_init_stacks (pTHX)
492	{	574	{
493	LOCK;	575	PL_curstackinfo = new_stackinfo(32, 8);
494
495	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
496	PL_curstackinfo->si_type = PERLSI_MAIN;	576	PL_curstackinfo->si_type = PERLSI_MAIN;
497	PL_curstack = PL_curstackinfo->si_stack;	577	PL_curstack = PL_curstackinfo->si_stack;
498	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	578	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
499		579
500	PL_stack_base = AvARRAY(PL_curstack);	580	PL_stack_base = AvARRAY(PL_curstack);
501	PL_stack_sp = PL_stack_base;	581	PL_stack_sp = PL_stack_base;
502	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	582	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
503		583
504	New(50,PL_tmps_stack,96,SV*);	584	New(50,PL_tmps_stack,32,SV*);
505	PL_tmps_floor = -1;	585	PL_tmps_floor = -1;
506	PL_tmps_ix = -1;	586	PL_tmps_ix = -1;
507	PL_tmps_max = 96;	587	PL_tmps_max = 32;
508		588
509	New(54,PL_markstack,16,I32);	589	New(54,PL_markstack,16,I32);
510	PL_markstack_ptr = PL_markstack;	590	PL_markstack_ptr = PL_markstack;
511	PL_markstack_max = PL_markstack + 16;	591	PL_markstack_max = PL_markstack + 16;
512		592
513	#ifdef SET_MARK_OFFSET	593	#ifdef SET_MARK_OFFSET
514	SET_MARK_OFFSET;	594	SET_MARK_OFFSET;
515	#endif	595	#endif
516		596
517	New(54,PL_scopestack,16,I32);	597	New(54,PL_scopestack,8,I32);
518	PL_scopestack_ix = 0;	598	PL_scopestack_ix = 0;
519	PL_scopestack_max = 16;	599	PL_scopestack_max = 8;
520		600
521	New(54,PL_savestack,96,ANY);	601	New(54,PL_savestack,24,ANY);
522	PL_savestack_ix = 0;	602	PL_savestack_ix = 0;
523	PL_savestack_max = 96;	603	PL_savestack_max = 24;
524		604
		605	#if !PERL_VERSION_ATLEAST (5,10,0)
525	New(54,PL_retstack,8,OP*);	606	New(54,PL_retstack,4,OP*);
526	PL_retstack_ix = 0;	607	PL_retstack_ix = 0;
527	PL_retstack_max = 8;	608	PL_retstack_max = 4;
528		609	#endif
529	UNLOCK;
530	}	610	}
		611	#endif
531		612
532	/*	613	/*
533	* destroy the stacks, the callchain etc...	614	* destroy the stacks, the callchain etc...
534	*/	615	*/
535	STATIC void	616	static void
536	destroy_stacks(pTHX)	617	coro_destroy_stacks (pTHX)
537	{	618	{
538	if (!IN_DESTRUCT)
539	{
540	/* is this ugly, I ask? */
541	LEAVE_SCOPE (0);
542
543	/* sure it is, but more important: is it correct?? :/ */
544	FREETMPS;
545
546	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
547	}
548
549	while (PL_curstackinfo->si_next)	619	while (PL_curstackinfo->si_next)
550	PL_curstackinfo = PL_curstackinfo->si_next;	620	PL_curstackinfo = PL_curstackinfo->si_next;
551		621
552	while (PL_curstackinfo)	622	while (PL_curstackinfo)
553	{	623	{
554	PERL_SI *p = PL_curstackinfo->si_prev;	624	PERL_SI *p = PL_curstackinfo->si_prev;
555		625
556	{ /*D*//*remove*/
557	dSP;
558	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
559	PUTBACK; /* possibly superfluous */
560	}
561
562	if (!IN_DESTRUCT)	626	if (!IN_DESTRUCT)
563	{
564	dounwind (-1);/*D*//*remove*/
565	SvREFCNT_dec (PL_curstackinfo->si_stack);	627	SvREFCNT_dec (PL_curstackinfo->si_stack);
566	}
567		628
568	Safefree (PL_curstackinfo->si_cxstack);	629	Safefree (PL_curstackinfo->si_cxstack);
569	Safefree (PL_curstackinfo);	630	Safefree (PL_curstackinfo);
570	PL_curstackinfo = p;	631	PL_curstackinfo = p;
571	}	632	}
572		633
573	Safefree (PL_tmps_stack);	634	Safefree (PL_tmps_stack);
574	Safefree (PL_markstack);	635	Safefree (PL_markstack);
575	Safefree (PL_scopestack);	636	Safefree (PL_scopestack);
576	Safefree (PL_savestack);	637	Safefree (PL_savestack);
		638	#if !PERL_VERSION_ATLEAST (5,10,0)
577	Safefree (PL_retstack);	639	Safefree (PL_retstack);
		640	#endif
		641	}
		642
		643	static size_t
		644	coro_rss (pTHX_ struct coro *coro)
		645	{
		646	size_t rss = sizeof (*coro);
		647
		648	if (coro->mainstack)
		649	{
		650	perl_slots tmp_slot;
		651	perl_slots *slot;
		652
		653	if (coro->flags & CF_RUNNING)
		654	{
		655	slot = &tmp_slot;
		656
		657	#define VAR(name,type) slot->name = PL_ ## name;
		658	# include "state.h"
		659	#undef VAR
		660	}
		661	else
		662	slot = coro->slot;
		663
		664	rss += sizeof (slot->curstackinfo);
		665	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		666	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		667	rss += slot->tmps_max * sizeof (SV *);
		668	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		669	rss += slot->scopestack_max * sizeof (I32);
		670	rss += slot->savestack_max * sizeof (ANY);
		671
		672	#if !PERL_VERSION_ATLEAST (5,10,0)
		673	rss += slot->retstack_max * sizeof (OP *);
		674	#endif
		675	}
		676
		677	return rss;
		678	}
		679
		680	/** coroutine stack handling ************************************************/
		681
		682	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		683	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		684
		685	/*
		686	* This overrides the default magic get method of %SIG elements.
		687	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		688	* and instead of tryign to save and restore the hash elements, we just provide
		689	* readback here.
		690	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		691	* not expecting this to actually change the hook. This is a potential problem
		692	* when a schedule happens then, but we ignore this.
		693	*/
		694	static int
		695	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		696	{
		697	const char *s = MgPV_nolen_const (mg);
		698
		699	if (*s == '_')
		700	{
		701	if (strEQ (s, "__DIE__" ) && PL_diehook ) return sv_setsv (sv, PL_diehook ), 0;
		702	if (strEQ (s, "__WARN__") && PL_warnhook) return sv_setsv (sv, PL_warnhook), 0;
		703	}
		704
		705	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		706	}
		707
		708	static int
		709	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		710	{
		711	const char *s = MgPV_nolen_const (mg);
		712
		713	if (*s == '_')
		714	{
		715	SV **svp = 0;
		716
		717	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		718	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		719
		720	if (svp)
		721	{
		722	SV *old = *svp;
		723	*svp = newSVsv (sv);
		724	SvREFCNT_dec (old);
		725	return 0;
		726	}
		727	}
		728
		729	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
578	}	730	}
579		731
580	static void	732	static void
581	allocate_stack (Coro__State ctx, int alloc)	733	coro_setup (pTHX_ struct coro *coro)
582	{
583	coro_stack *stack;
584
585	New (0, stack, 1, coro_stack);
586
587	stack->refcnt = 1;
588	stack->usecnt = 1;
589	stack->gencnt = ctx->gencnt = 0;
590
591	if (alloc)
592	{
593	#if HAVE_MMAP
594	stack->ssize = STACKSIZE * sizeof (long); /* mmap should do allocate-on-write for us */
595	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
596	if (stack->sptr == (void *)-1)
597	#endif
598	{
599	/*FIXME*//*D*//* reasonable stack size! */
600	stack->ssize = - (STACKSIZE * sizeof (long));
601	New (0, stack->sptr, STACKSIZE, long);
602	}
603	}
604	else
605	stack->sptr = 0;
606
607	ctx->stack = stack;
608	}
609
610	static void
611	deallocate_stack (Coro__State ctx)
612	{
613	coro_stack *stack = ctx->stack;
614
615	ctx->stack = 0;
616
617	if (stack)
618	{
619	if (!--stack->refcnt)
620	{
621	#ifdef HAVE_MMAP
622	if (stack->ssize > 0 && stack->sptr)
623	munmap (stack->sptr, stack->ssize);
624	else
625	#endif
626	Safefree (stack->sptr);
627
628	Safefree (stack);
629	}
630	else if (ctx->gencnt == stack->gencnt)
631	--stack->usecnt;
632	}
633	}
634
635	static void
636	setup_coro (void *arg)
637	{	734	{
638	/*	735	/*
639	* emulate part of the perl startup here.	736	* emulate part of the perl startup here.
640	*/	737	*/
641	dTHX;
642	dSP;
643	Coro__State ctx = (Coro__State)arg;
644	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
645
646	coro_init_stacks (aTHX);	738	coro_init_stacks (aTHX);
647	/*PL_curcop = 0;*/	739
648	/*PL_in_eval = PL_in_eval;*/ /* inherit */	740	PL_runops = RUNOPS_DEFAULT;
		741	PL_curcop = &PL_compiling;
		742	PL_in_eval = EVAL_NULL;
		743	PL_comppad = 0;
		744	PL_curpm = 0;
		745	PL_curpad = 0;
		746	PL_localizing = 0;
		747	PL_dirty = 0;
		748	PL_restartop = 0;
		749	#if PERL_VERSION_ATLEAST (5,10,0)
		750	PL_parser = 0;
		751	#endif
		752
		753	/* recreate the die/warn hooks */
		754	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		755	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		756
		757	GvSV (PL_defgv) = newSV (0);
		758	GvAV (PL_defgv) = coro->args; coro->args = 0;
		759	GvSV (PL_errgv) = newSV (0);
		760	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		761	PL_rs = newSVsv (GvSV (irsgv));
		762	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		763
		764	{
		765	dSP;
		766	LOGOP myop;
		767
		768	Zero (&myop, 1, LOGOP);
		769	myop.op_next = Nullop;
		770	myop.op_flags = OPf_WANT_VOID;
		771
		772	PUSHMARK (SP);
		773	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		774	PUTBACK;
		775	PL_op = (OP *)&myop;
		776	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		777	SPAGAIN;
		778	}
		779
		780	/* this newly created coroutine might be run on an existing cctx which most
		781	* likely was suspended in set_stacklevel, called from entersub.
		782	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		783	* so we ENTER here for symmetry
		784	*/
		785	ENTER;
		786	}
		787
		788	static void
		789	coro_destroy (pTHX_ struct coro *coro)
		790	{
		791	if (!IN_DESTRUCT)
		792	{
		793	/* restore all saved variables and stuff */
		794	LEAVE_SCOPE (0);
		795	assert (PL_tmps_floor == -1);
		796
		797	/* free all temporaries */
		798	FREETMPS;
		799	assert (PL_tmps_ix == -1);
		800
		801	/* unwind all extra stacks */
		802	POPSTACK_TO (PL_mainstack);
		803
		804	/* unwind main stack */
		805	dounwind (-1);
		806	}
		807
		808	SvREFCNT_dec (GvSV (PL_defgv));
649	SvREFCNT_dec (GvAV (PL_defgv));	809	SvREFCNT_dec (GvAV (PL_defgv));
650	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	810	SvREFCNT_dec (GvSV (PL_errgv));
		811	SvREFCNT_dec (PL_defoutgv);
		812	SvREFCNT_dec (PL_rs);
		813	SvREFCNT_dec (GvSV (irsgv));
651		814
652	SPAGAIN;	815	SvREFCNT_dec (PL_diehook);
		816	SvREFCNT_dec (PL_warnhook);
		817
		818	SvREFCNT_dec (coro->saved_deffh);
		819	SvREFCNT_dec (coro->throw);
653		820
654	if (ctx->stack)	821	coro_destroy_stacks (aTHX);
655	{
656	ctx->cursp = 0;
657
658	PUSHMARK(SP);
659	PUTBACK;
660	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
661
662	if (SvTRUE (ERRSV))
663	croak (NULL);
664	else
665	croak ("FATAL: CCTXT coroutine returned!");
666	}
667	else
668	{
669	UNOP myop;
670
671	PL_op = (OP *)&myop;
672
673	Zero(&myop, 1, UNOP);
674	myop.op_next = Nullop;
675	myop.op_flags = OPf_WANT_VOID;
676
677	PUSHMARK(SP);
678	XPUSHs (sub_init);
679	/*
680	* the next line is slightly wrong, as PL_op->op_next
681	* is actually being executed so we skip the first op.
682	* that doesn't matter, though, since it is only
683	* pp_nextstate and we never return...
684	* ah yes, and I don't care anyways ;)
685	*/
686	PUTBACK;
687	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
688	SPAGAIN;
689
690	ENTER; /* necessary e.g. for dounwind */
691	}
692	}	822	}
693		823
694	static void	824	static void
695	continue_coro (void *arg)	825	free_coro_mortal (pTHX)
696	{	826	{
697	/*	827	if (expect_true (coro_mortal))
698	* this is a _very_ stripped down perl interpreter ;)	828	{
699	*/	829	SvREFCNT_dec (coro_mortal);
700	dTHX;	830	coro_mortal = 0;
701	Coro__State ctx = (Coro__State)arg;
702	JMPENV coro_start_env;
703
704	PL_top_env = &ctx->start_env;
705
706	ctx->cursp = 0;
707	PL_op = PL_op->op_next;
708	CALLRUNOPS(aTHX);
709
710	abort ();
711	}
712
713	STATIC void
714	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
715	{
716	dSTACKLEVEL;
717
718	if (prev != next)
719	{	831	}
720	if (next->mainstack)	832	}
		833
		834	static int
		835	runops_trace (pTHX)
		836	{
		837	COP *oldcop = 0;
		838	int oldcxix = -2;
		839	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		840	coro_cctx *cctx = coro->cctx;
		841
		842	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		843	{
		844	PERL_ASYNC_CHECK ();
		845
		846	if (cctx->flags & CC_TRACE_ALL)
721	{	847	{
722	LOCK;	848	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
723	SAVE (prev, flags);
724	LOAD (next);
725	UNLOCK;
726
727	/* mark this state as in-use */
728	next->mainstack = 0;
729	next->tmps_ix = -2;
730
731	/* stacklevel changed? if yes, grab the stack for us! */
732	if (flags & TRANSFER_SAVE_CCTXT)
733	{	849	{
734	if (!prev->stack)	850	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
735	allocate_stack (prev, 0);	851	SV **bot, **top;
736	else if (prev->cursp != stacklevel	852	AV *av = newAV (); /* return values */
737	&& prev->stack->usecnt > 1)	853	SV **cb;
		854	dSP;
		855
		856	GV *gv = CvGV (cx->blk_sub.cv);
		857	SV *fullname = sv_2mortal (newSV (0));
		858	if (isGV (gv))
		859	gv_efullname3 (fullname, gv, 0);
		860
		861	bot = PL_stack_base + cx->blk_oldsp + 1;
		862	top = cx->blk_gimme == G_ARRAY ? SP + 1
		863	: cx->blk_gimme == G_SCALAR ? bot + 1
		864	: bot;
		865
		866	av_extend (av, top - bot);
		867	while (bot < top)
		868	av_push (av, SvREFCNT_inc (*bot++));
		869
		870	PL_runops = RUNOPS_DEFAULT;
		871	ENTER;
		872	SAVETMPS;
		873	EXTEND (SP, 3);
		874	PUSHMARK (SP);
		875	PUSHs (&PL_sv_no);
		876	PUSHs (fullname);
		877	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		878	PUTBACK;
		879	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		880	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		881	SPAGAIN;
		882	FREETMPS;
		883	LEAVE;
		884	PL_runops = runops_trace;
		885	}
		886
		887	if (oldcop != PL_curcop)
		888	{
		889	oldcop = PL_curcop;
		890
		891	if (PL_curcop != &PL_compiling)
738	{	892	{
739	prev->gencnt = ++prev->stack->gencnt;	893	SV **cb;
740	prev->stack->usecnt = 1;
741	}
742		894
743	/* has our stack been invalidated? */	895	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
744	if (next->stack && next->stack->gencnt != next->gencnt)
745	{	896	{
746	deallocate_stack (next);	897	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
747	allocate_stack (next, 1);	898
748	coro_create (&(next->stack->cctx),	899	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
749	continue_coro, (void *)next,	900	{
750	next->stack->sptr, labs (next->stack->ssize));	901	runops_proc_t old_runops = PL_runops;
		902	dSP;
		903	GV *gv = CvGV (cx->blk_sub.cv);
		904	SV *fullname = sv_2mortal (newSV (0));
		905
		906	if (isGV (gv))
		907	gv_efullname3 (fullname, gv, 0);
		908
		909	PL_runops = RUNOPS_DEFAULT;
		910	ENTER;
		911	SAVETMPS;
		912	EXTEND (SP, 3);
		913	PUSHMARK (SP);
		914	PUSHs (&PL_sv_yes);
		915	PUSHs (fullname);
		916	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		917	PUTBACK;
		918	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		919	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		920	SPAGAIN;
		921	FREETMPS;
		922	LEAVE;
		923	PL_runops = runops_trace;
		924	}
		925
		926	oldcxix = cxstack_ix;
751	}	927	}
752		928
753	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));	929	if (cctx->flags & CC_TRACE_LINE)
754	prev->cursp = stacklevel;
755	/* don't add any code here */
756	}
757	else
758	next->cursp = stacklevel;
759	}
760	else if (next->tmps_ix == -2)
761	croak ("tried to transfer to running coroutine");
762	else
763	{
764	LOCK;
765	SAVE (prev, -1); /* first get rid of the old state */
766	UNLOCK;
767
768	if (flags & TRANSFER_SAVE_CCTXT)
769	{
770	if (!prev->stack)
771	allocate_stack (prev, 0);
772
773	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
774	{	930	{
775	PL_top_env = &next->start_env;	931	dSP;
776		932
777	setup_coro (next);	933	PL_runops = RUNOPS_DEFAULT;
778	next->cursp = stacklevel;	934	ENTER;
779		935	SAVETMPS;
780	prev->stack->refcnt++;	936	EXTEND (SP, 3);
781	prev->stack->usecnt++;	937	PL_runops = RUNOPS_DEFAULT;
782	next->stack = prev->stack;	938	PUSHMARK (SP);
783	next->gencnt = prev->gencnt;	939	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		940	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		941	PUTBACK;
		942	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		943	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		944	SPAGAIN;
		945	FREETMPS;
		946	LEAVE;
		947	PL_runops = runops_trace;
784	}	948	}
785	else
786	{
787	assert (!next->stack);
788	allocate_stack (next, 1);
789	coro_create (&(next->stack->cctx),
790	setup_coro, (void *)next,
791	next->stack->sptr, labs (next->stack->ssize));
792	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
793	prev->cursp = stacklevel;
794	/* don't add any code here */
795	}	949	}
796	}	950	}
		951	}
		952	}
		953
		954	TAINT_NOT;
		955	return 0;
		956	}
		957
		958	/* inject a fake call to Coro::State::_cctx_init into the execution */
		959	/* _cctx_init should be careful, as it could be called at almost any time */
		960	/* during execution of a perl program */
		961	static void NOINLINE
		962	cctx_prepare (pTHX_ coro_cctx *cctx)
		963	{
		964	dSP;
		965	LOGOP myop;
		966
		967	PL_top_env = &PL_start_env;
		968
		969	if (cctx->flags & CC_TRACE)
		970	PL_runops = runops_trace;
		971
		972	Zero (&myop, 1, LOGOP);
		973	myop.op_next = PL_op;
		974	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
		975
		976	PUSHMARK (SP);
		977	EXTEND (SP, 2);
		978	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		979	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		980	PUTBACK;
		981	PL_op = (OP *)&myop;
		982	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		983	SPAGAIN;
		984	}
		985
		986	/*
		987	* this is a _very_ stripped down perl interpreter ;)
		988	*/
		989	static void
		990	cctx_run (void *arg)
		991	{
		992	dTHX;
		993
		994	/* cctx_run is the alternative tail of transfer(), so unlock here. */
		995	UNLOCK;
		996
		997	/* we now skip the entersub that lead to transfer() */
		998	PL_op = PL_op->op_next;
		999
		1000	/* inject a fake subroutine call to cctx_init */
		1001	cctx_prepare (aTHX_ (coro_cctx *)arg);
		1002
		1003	/* somebody or something will hit me for both perl_run and PL_restartop */
		1004	PL_restartop = PL_op;
		1005	perl_run (PL_curinterp);
		1006
		1007	/*
		1008	* If perl-run returns we assume exit() was being called or the coro
		1009	* fell off the end, which seems to be the only valid (non-bug)
		1010	* reason for perl_run to return. We try to exit by jumping to the
		1011	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1012	* coroutine as Coro has no such concept
		1013	*/
		1014	PL_top_env = main_top_env;
		1015	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1016	}
		1017
		1018	static coro_cctx *
		1019	cctx_new ()
		1020	{
		1021	coro_cctx *cctx;
		1022	void *stack_start;
		1023	size_t stack_size;
		1024
		1025	++cctx_count;
		1026
		1027	Newz (0, cctx, 1, coro_cctx);
		1028
		1029	#if HAVE_MMAP
		1030	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		1031	/* mmap supposedly does allocate-on-write for us */
		1032	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		1033
		1034	if (cctx->sptr != (void *)-1)
		1035	{
		1036	# if CORO_STACKGUARD
		1037	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		1038	# endif
		1039	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1040	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1041	cctx->flags |= CC_MAPPED;
		1042	}
		1043	else
		1044	#endif
		1045	{
		1046	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1047	New (0, cctx->sptr, coro_stacksize, long);
		1048
		1049	if (!cctx->sptr)
		1050	{
		1051	perror ("FATAL: unable to allocate stack for coroutine");
		1052	_exit (EXIT_FAILURE);
		1053	}
		1054
		1055	stack_start = cctx->sptr;
		1056	stack_size = cctx->ssize;
		1057	}
		1058
		1059	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		1060	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1061
		1062	return cctx;
		1063	}
		1064
		1065	static void
		1066	cctx_destroy (coro_cctx *cctx)
		1067	{
		1068	if (!cctx)
		1069	return;
		1070
		1071	--cctx_count;
		1072
		1073	#if CORO_USE_VALGRIND
		1074	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1075	#endif
		1076
		1077	#if HAVE_MMAP
		1078	if (cctx->flags & CC_MAPPED)
		1079	munmap (cctx->sptr, cctx->ssize);
		1080	else
		1081	#endif
		1082	Safefree (cctx->sptr);
		1083
		1084	Safefree (cctx);
		1085	}
		1086
		1087	/* wether this cctx should be destructed */
		1088	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
		1089
		1090	static coro_cctx *
		1091	cctx_get (pTHX)
		1092	{
		1093	while (expect_true (cctx_first))
		1094	{
		1095	coro_cctx *cctx = cctx_first;
		1096	cctx_first = cctx->next;
		1097	--cctx_idle;
		1098
		1099	if (expect_true (!CCTX_EXPIRED (cctx)))
		1100	return cctx;
		1101
		1102	cctx_destroy (cctx);
		1103	}
		1104
		1105	return cctx_new ();
		1106	}
		1107
		1108	static void
		1109	cctx_put (coro_cctx *cctx)
		1110	{
		1111	/* free another cctx if overlimit */
		1112	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1113	{
		1114	coro_cctx *first = cctx_first;
		1115	cctx_first = first->next;
		1116	--cctx_idle;
		1117
		1118	cctx_destroy (first);
		1119	}
		1120
		1121	++cctx_idle;
		1122	cctx->next = cctx_first;
		1123	cctx_first = cctx;
		1124	}
		1125
		1126	/** coroutine switching *****************************************************/
		1127
		1128	static void
		1129	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1130	{
		1131	if (expect_true (prev != next))
		1132	{
		1133	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1134	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
		1135
		1136	if (expect_false (next->flags & CF_RUNNING))
		1137	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1138
		1139	if (expect_false (next->flags & CF_DESTROYED))
		1140	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1141
		1142	#if !PERL_VERSION_ATLEAST (5,10,0)
		1143	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		1144	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1145	#endif
		1146	}
		1147	}
		1148
		1149	/* always use the TRANSFER macro */
		1150	static void NOINLINE
		1151	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
		1152	{
		1153	dSTACKLEVEL;
		1154	static volatile int has_throw;
		1155
		1156	/* sometimes transfer is only called to set idle_sp */
		1157	if (expect_false (!next))
		1158	{
		1159	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		1160	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		1161	}
		1162	else if (expect_true (prev != next))
		1163	{
		1164	coro_cctx *prev__cctx;
		1165
		1166	if (expect_false (prev->flags & CF_NEW))
		1167	{
		1168	/* create a new empty context */
		1169	Newz (0, prev->cctx, 1, coro_cctx);
		1170	prev->flags &= ~CF_NEW;
		1171	prev->flags |= CF_RUNNING;
		1172	}
		1173
		1174	prev->flags &= ~CF_RUNNING;
		1175	next->flags |= CF_RUNNING;
		1176
		1177	LOCK;
		1178
		1179	/* first get rid of the old state */
		1180	save_perl (aTHX_ prev);
		1181
		1182	if (expect_false (next->flags & CF_NEW))
		1183	{
		1184	/* need to start coroutine */
		1185	next->flags &= ~CF_NEW;
		1186	/* setup coroutine call */
		1187	coro_setup (aTHX_ next);
		1188	}
797	else	1189	else
		1190	load_perl (aTHX_ next);
		1191
		1192	prev__cctx = prev->cctx;
		1193
		1194	/* possibly "free" the cctx */
		1195	if (expect_true (
		1196	prev__cctx->idle_sp == STACKLEVEL
		1197	&& !(prev__cctx->flags & CC_TRACE)
		1198	&& !force_cctx
		1199	))
		1200	{
		1201	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		1202	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		1203
		1204	prev->cctx = 0;
		1205
		1206	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
		1207	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1208	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1209	if (!next->cctx)
		1210	next->cctx = cctx_get (aTHX);
		1211
		1212	cctx_put (prev__cctx);
		1213	}
		1214
		1215	++next->usecount;
		1216
		1217	if (expect_true (!next->cctx))
		1218	next->cctx = cctx_get (aTHX);
		1219
		1220	has_throw = !!next->throw;
		1221
		1222	if (expect_false (prev__cctx != next->cctx))
		1223	{
		1224	prev__cctx->top_env = PL_top_env;
		1225	PL_top_env = next->cctx->top_env;
		1226	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		1227	}
		1228
		1229	free_coro_mortal (aTHX);
		1230	UNLOCK;
		1231
		1232	if (expect_false (has_throw))
		1233	{
		1234	struct coro *coro = SvSTATE (coro_current);
		1235
		1236	if (coro->throw)
798	{	1237	{
		1238	SV *exception = coro->throw;
		1239	coro->throw = 0;
		1240	sv_setsv (ERRSV, exception);
799	setup_coro (next);	1241	croak (0);
800	next->cursp = stacklevel;
801	}	1242	}
802	}	1243	}
803	}	1244	}
		1245	}
		1246
		1247	struct transfer_args
		1248	{
		1249	struct coro *prev, *next;
		1250	};
		1251
		1252	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
		1253	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1254
		1255	/** high level stuff ********************************************************/
		1256
		1257	static int
		1258	coro_state_destroy (pTHX_ struct coro *coro)
		1259	{
		1260	if (coro->flags & CF_DESTROYED)
		1261	return 0;
		1262
		1263	coro->flags |= CF_DESTROYED;
		1264
		1265	if (coro->flags & CF_READY)
		1266	{
		1267	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1268	/* alternative: look through all ready queues and remove the coro */
		1269	LOCK;
		1270	--coro_nready;
		1271	UNLOCK;
		1272	}
		1273	else
		1274	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
		1275
		1276	if (coro->mainstack && coro->mainstack != main_mainstack)
		1277	{
		1278	struct coro temp;
		1279
		1280	if (coro->flags & CF_RUNNING)
		1281	croak ("FATAL: tried to destroy currently running coroutine");
		1282
		1283	save_perl (aTHX_ &temp);
		1284	load_perl (aTHX_ coro);
		1285
		1286	coro_destroy (aTHX_ coro);
		1287
		1288	load_perl (aTHX_ &temp);
		1289
		1290	coro->slot = 0;
		1291	}
		1292
		1293	cctx_destroy (coro->cctx);
		1294	SvREFCNT_dec (coro->args);
		1295
		1296	if (coro->next) coro->next->prev = coro->prev;
		1297	if (coro->prev) coro->prev->next = coro->next;
		1298	if (coro == coro_first) coro_first = coro->next;
		1299
		1300	return 1;
		1301	}
		1302
		1303	static int
		1304	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		1305	{
		1306	struct coro *coro = (struct coro *)mg->mg_ptr;
		1307	mg->mg_ptr = 0;
		1308
		1309	coro->hv = 0;
		1310
		1311	if (--coro->refcnt < 0)
		1312	{
		1313	coro_state_destroy (aTHX_ coro);
		1314	Safefree (coro);
		1315	}
		1316
		1317	return 0;
		1318	}
		1319
		1320	static int
		1321	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		1322	{
		1323	struct coro *coro = (struct coro *)mg->mg_ptr;
		1324
		1325	++coro->refcnt;
		1326
		1327	return 0;
		1328	}
		1329
		1330	static MGVTBL coro_state_vtbl = {
		1331	0, 0, 0, 0,
		1332	coro_state_free,
		1333	0,
		1334	#ifdef MGf_DUP
		1335	coro_state_dup,
		1336	#else
		1337	# define MGf_DUP 0
		1338	#endif
		1339	};
		1340
		1341	static void
		1342	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1343	{
		1344	ta->prev = SvSTATE (prev_sv);
		1345	ta->next = SvSTATE (next_sv);
		1346	TRANSFER_CHECK (*ta);
		1347	}
		1348
		1349	static void
		1350	api_transfer (SV *prev_sv, SV *next_sv)
		1351	{
		1352	dTHX;
		1353	struct transfer_args ta;
		1354
		1355	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1356	TRANSFER (ta, 1);
		1357	}
		1358
		1359	/** Coro ********************************************************************/
		1360
		1361	static void
		1362	coro_enq (pTHX_ SV *coro_sv)
		1363	{
		1364	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1365	}
		1366
		1367	static SV *
		1368	coro_deq (pTHX)
		1369	{
		1370	int prio;
		1371
		1372	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
		1373	if (AvFILLp (coro_ready [prio]) >= 0)
		1374	return av_shift (coro_ready [prio]);
		1375
		1376	return 0;
		1377	}
		1378
		1379	static int
		1380	api_ready (SV *coro_sv)
		1381	{
		1382	dTHX;
		1383	struct coro *coro;
		1384
		1385	if (SvROK (coro_sv))
		1386	coro_sv = SvRV (coro_sv);
		1387
		1388	coro = SvSTATE (coro_sv);
		1389
		1390	if (coro->flags & CF_READY)
		1391	return 0;
		1392
		1393	coro->flags |= CF_READY;
804		1394
805	LOCK;	1395	LOCK;
806	if (coro_mortal)	1396	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
807	{	1397	++coro_nready;
808	SvREFCNT_dec (coro_mortal);
809	coro_mortal = 0;
810	}
811	UNLOCK;	1398	UNLOCK;
812	}
813		1399
814	#define SV_CORO(sv,func) \	1400	return 1;
815	do { \	1401	}
816	if (SvROK (sv)) \
817	sv = SvRV (sv); \
818	\
819	if (SvTYPE (sv) == SVt_PVHV) \
820	{ \
821	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
822	\
823	if (!he) \
824	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
825	\
826	(sv) = SvRV (HeVAL(he)); \
827	} \
828	\
829	/* must also be changed inside Coro::Cont::yield */ \
830	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
831	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
832	\
833	} while(0)
834		1402
835	#define SvSTATE(sv) (struct coro *)SvIV (sv)	1403	static int
		1404	api_is_ready (SV *coro_sv)
		1405	{
		1406	dTHX;
		1407	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1408	}
836		1409
837	static void	1410	static void
838	api_transfer(pTHX_ SV *prev, SV *next, int flags)	1411	prepare_schedule (pTHX_ struct transfer_args *ta)
839	{	1412	{
840	SV_CORO (prev, "Coro::transfer");	1413	SV *prev_sv, *next_sv;
841	SV_CORO (next, "Coro::transfer");
842		1414
843	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1415	for (;;)
844	}	1416	{
		1417	LOCK;
		1418	next_sv = coro_deq (aTHX);
845		1419
846	/** Coro ********************************************************************/	1420	/* nothing to schedule: call the idle handler */
		1421	if (expect_false (!next_sv))
		1422	{
		1423	dSP;
		1424	UNLOCK;
847		1425
848	#define PRIO_MAX 3	1426	ENTER;
849	#define PRIO_HIGH 1	1427	SAVETMPS;
850	#define PRIO_NORMAL 0
851	#define PRIO_LOW -1
852	#define PRIO_IDLE -3
853	#define PRIO_MIN -4
854		1428
855	/* for Coro.pm */	1429	PUSHMARK (SP);
856	static GV *coro_current, *coro_idle;	1430	PUTBACK;
857	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	1431	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
858	static int coro_nready;	1432	SPAGAIN;
		1433
		1434	FREETMPS;
		1435	LEAVE;
		1436	continue;
		1437	}
		1438
		1439	ta->next = SvSTATE (next_sv);
		1440
		1441	/* cannot transfer to destroyed coros, skip and look for next */
		1442	if (expect_false (ta->next->flags & CF_DESTROYED))
		1443	{
		1444	UNLOCK;
		1445	SvREFCNT_dec (next_sv);
		1446	/* coro_nready is already taken care of by destroy */
		1447	continue;
		1448	}
		1449
		1450	--coro_nready;
		1451	UNLOCK;
		1452	break;
		1453	}
		1454
		1455	/* free this only after the transfer */
		1456	prev_sv = SvRV (coro_current);
		1457	ta->prev = SvSTATE (prev_sv);
		1458	TRANSFER_CHECK (*ta);
		1459	assert (ta->next->flags & CF_READY);
		1460	ta->next->flags &= ~CF_READY;
		1461	SvRV_set (coro_current, next_sv);
		1462
		1463	LOCK;
		1464	free_coro_mortal (aTHX);
		1465	coro_mortal = prev_sv;
		1466	UNLOCK;
		1467	}
859		1468
860	static void	1469	static void
861	coro_enq (pTHX_ SV *sv)	1470	prepare_cede (pTHX_ struct transfer_args *ta)
862	{	1471	{
863	if (SvTYPE (sv) == SVt_PVHV)	1472	api_ready (coro_current);
864	{	1473	prepare_schedule (aTHX_ ta);
865	SV **xprio = hv_fetch ((HV *)sv, "prio", 4, 0);	1474	}
866	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
867		1475
868	prio = prio > PRIO_MAX ? PRIO_MAX	1476	static int
869	: prio < PRIO_MIN ? PRIO_MIN	1477	prepare_cede_notself (pTHX_ struct transfer_args *ta)
870	: prio;	1478	{
871		1479	if (coro_nready)
872	av_push (coro_ready [prio - PRIO_MIN], sv);	1480	{
873	coro_nready++;	1481	SV *prev = SvRV (coro_current);
874		1482	prepare_schedule (aTHX_ ta);
		1483	api_ready (prev);
875	return;	1484	return 1;
876	}
877
878	croak ("Coro::ready tried to enqueue something that is not a coroutine");
879	}
880
881	static SV *
882	coro_deq (pTHX_ int min_prio)
883	{
884	int prio = PRIO_MAX - PRIO_MIN;
885
886	min_prio -= PRIO_MIN;
887	if (min_prio < 0)
888	min_prio = 0;
889
890	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
891	if (av_len (coro_ready[prio]) >= 0)
892	{
893	coro_nready--;
894	return av_shift (coro_ready[prio]);
895	}	1485	}
896		1486	else
897	return 0;	1487	return 0;
898	}
899
900	static void
901	api_ready (SV *coro)
902	{
903	dTHX;
904
905	if (SvROK (coro))
906	coro = SvRV (coro);
907
908	LOCK;
909	coro_enq (aTHX_ SvREFCNT_inc (coro));
910	UNLOCK;
911	}	1488	}
912		1489
913	static void	1490	static void
914	api_schedule (void)	1491	api_schedule (void)
915	{	1492	{
916	dTHX;	1493	dTHX;
		1494	struct transfer_args ta;
917		1495
918	SV *prev, *next;	1496	prepare_schedule (aTHX_ &ta);
		1497	TRANSFER (ta, 1);
		1498	}
919		1499
920	LOCK;	1500	static int
		1501	api_cede (void)
		1502	{
		1503	dTHX;
		1504	struct transfer_args ta;
921		1505
922	prev = SvRV (GvSV (coro_current));	1506	prepare_cede (aTHX_ &ta);
923	next = coro_deq (aTHX_ PRIO_MIN);
924		1507
925	if (!next)	1508	if (expect_true (ta.prev != ta.next))
926	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));	1509	{
		1510	TRANSFER (ta, 1);
		1511	return 1;
		1512	}
		1513	else
		1514	return 0;
		1515	}
927		1516
928	/* free this only after the transfer */	1517	static int
929	coro_mortal = prev;	1518	api_cede_notself (void)
930	SV_CORO (prev, "Coro::schedule");	1519	{
		1520	dTHX;
		1521	struct transfer_args ta;
931		1522
932	SvRV (GvSV (coro_current)) = next;	1523	if (prepare_cede_notself (aTHX_ &ta))
933		1524	{
934	SV_CORO (next, "Coro::schedule");	1525	TRANSFER (ta, 1);
935		1526	return 1;
936	UNLOCK;	1527	}
937		1528	else
938	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),	1529	return 0;
939	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
940	}	1530	}
941		1531
942	static void	1532	static void
943	api_cede (void)	1533	api_trace (SV *coro_sv, int flags)
944	{	1534	{
945	dTHX;	1535	dTHX;
		1536	struct coro *coro = SvSTATE (coro_sv);
946		1537
947	LOCK;	1538	if (flags & CC_TRACE)
948	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1539	{
949	UNLOCK;	1540	if (!coro->cctx)
		1541	coro->cctx = cctx_new ();
		1542	else if (!(coro->cctx->flags & CC_TRACE))
		1543	croak ("cannot enable tracing on coroutine with custom stack");
950		1544
951	api_schedule ();	1545	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
952	}	1546	}
		1547	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1548	{
		1549	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
953		1550
		1551	if (coro->flags & CF_RUNNING)
		1552	PL_runops = RUNOPS_DEFAULT;
		1553	else
		1554	coro->slot->runops = RUNOPS_DEFAULT;
		1555	}
		1556	}
		1557
954	MODULE = Coro::State PACKAGE = Coro::State	1558	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
955		1559
956	PROTOTYPES: ENABLE	1560	PROTOTYPES: DISABLE
957		1561
958	BOOT:	1562	BOOT:
959	{ /* {} necessary for stoopid perl-5.6.x */	1563	{
960	#ifdef USE_ITHREADS	1564	#ifdef USE_ITHREADS
961	MUTEX_INIT (&coro_mutex);	1565	MUTEX_INIT (&coro_mutex);
962	#endif	1566	#endif
		1567	BOOT_PAGESIZE;
963		1568
964	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1569	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
965	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1570	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1571
		1572	orig_sigelem_get = PL_vtbl_sigelem.svt_get;
		1573	PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1574	orig_sigelem_set = PL_vtbl_sigelem.svt_set;
		1575	PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1576
		1577	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1578	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1579	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1580
966	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1581	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
967		1582
968	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1583	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
969	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1584	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
970	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1585	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
971	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1586	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
972		1587
973	main_mainstack = PL_mainstack;	1588	main_mainstack = PL_mainstack;
		1589	main_top_env = PL_top_env;
		1590
		1591	while (main_top_env->je_prev)
		1592	main_top_env = main_top_env->je_prev;
974		1593
975	coroapi.ver = CORO_API_VERSION;	1594	coroapi.ver = CORO_API_VERSION;
		1595	coroapi.rev = CORO_API_REVISION;
976	coroapi.transfer = api_transfer;	1596	coroapi.transfer = api_transfer;
977	}
978		1597
979	Coro::State	1598	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
980	_newprocess(args)	1599	}
981	SV * args	1600
982	PROTOTYPE: $	1601	SV *
		1602	new (char *klass, ...)
983	CODE:	1603	CODE:
984	Coro__State coro;	1604	{
		1605	struct coro *coro;
		1606	MAGIC *mg;
		1607	HV *hv;
		1608	int i;
985		1609
986	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
987	croak ("Coro::State::_newprocess expects an arrayref");
988
989	Newz (0, coro, 1, struct coro);	1610	Newz (0, coro, 1, struct coro);
		1611	coro->args = newAV ();
		1612	coro->flags = CF_NEW;
990		1613
991	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1614	if (coro_first) coro_first->prev = coro;
992	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1615	coro->next = coro_first;
993	/*coro->stack = 0;*/	1616	coro_first = coro;
994		1617
995	/* same as JMPENV_BOOTSTRAP */	1618	coro->hv = hv = newHV ();
996	/* we might be able to recycle start_env, but safe is safe */	1619	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
997	/*Zero(&coro->start_env, 1, JMPENV);*/	1620	mg->mg_flags |= MGf_DUP;
998	coro->start_env.je_ret = -1;	1621	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
999	coro->start_env.je_mustcatch = TRUE;
1000		1622
1001	RETVAL = coro;	1623	av_extend (coro->args, items - 1);
		1624	for (i = 1; i < items; i++)
		1625	av_push (coro->args, newSVsv (ST (i)));
		1626	}
1002	OUTPUT:	1627	OUTPUT:
1003	RETVAL	1628	RETVAL
1004		1629
		1630	# these not obviously related functions are all rolled into the same xs
		1631	# function to increase chances that they all will call transfer with the same
		1632	# stack offset
1005	void	1633	void
1006	transfer(prev, next, flags)	1634	_set_stacklevel (...)
1007	SV *prev	1635	ALIAS:
1008	SV *next	1636	Coro::State::transfer = 1
1009	int flags	1637	Coro::schedule = 2
1010	PROTOTYPE: @	1638	Coro::cede = 3
		1639	Coro::cede_notself = 4
1011	CODE:	1640	CODE:
		1641	{
		1642	struct transfer_args ta;
		1643
1012	PUTBACK;	1644	PUTBACK;
1013	SV_CORO (next, "Coro::transfer");	1645	switch (ix)
1014	SV_CORO (prev, "Coro::transfer");	1646	{
1015	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1647	case 0:
		1648	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1649	ta.next = 0;
		1650	break;
		1651
		1652	case 1:
		1653	if (items != 2)
		1654	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1655
		1656	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1657	break;
		1658
		1659	case 2:
		1660	prepare_schedule (aTHX_ &ta);
		1661	break;
		1662
		1663	case 3:
		1664	prepare_cede (aTHX_ &ta);
		1665	break;
		1666
		1667	case 4:
		1668	if (!prepare_cede_notself (aTHX_ &ta))
		1669	XSRETURN_EMPTY;
		1670
		1671	break;
		1672	}
1016	SPAGAIN;	1673	SPAGAIN;
1017		1674
		1675	BARRIER;
		1676	PUTBACK;
		1677	TRANSFER (ta, 0);
		1678	SPAGAIN; /* might be the sp of a different coroutine now */
		1679	/* be extra careful not to ever do anything after TRANSFER */
		1680	}
		1681
		1682	bool
		1683	_destroy (SV *coro_sv)
		1684	CODE:
		1685	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1686	OUTPUT:
		1687	RETVAL
		1688
1018	void	1689	void
1019	DESTROY(coro)
1020	Coro::State coro
1021	CODE:
1022
1023	if (coro->mainstack && coro->mainstack != main_mainstack)
1024	{
1025	struct coro temp;
1026
1027	PUTBACK;
1028	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);
1029	LOAD (aTHX_ coro);
1030	SPAGAIN;
1031
1032	destroy_stacks (aTHX);
1033
1034	LOAD ((&temp)); /* this will get rid of defsv etc.. */
1035	SPAGAIN;
1036
1037	coro->mainstack = 0;
1038	}
1039
1040	deallocate_stack (coro);
1041	SvREFCNT_dec (coro->args);
1042	Safefree (coro);
1043
1044	void
1045	_exit(code)	1690	_exit (code)
1046	int code	1691	int code
1047	PROTOTYPE: $	1692	PROTOTYPE: $
1048	CODE:	1693	CODE:
1049	_exit (code);	1694	_exit (code);
1050		1695
1051	MODULE = Coro::State PACKAGE = Coro::Cont	1696	int
		1697	cctx_stacksize (int new_stacksize = 0)
		1698	CODE:
		1699	RETVAL = coro_stacksize;
		1700	if (new_stacksize)
		1701	coro_stacksize = new_stacksize;
		1702	OUTPUT:
		1703	RETVAL
1052		1704
1053	# this is slightly dirty (should expose a c-level api)	1705	int
		1706	cctx_count ()
		1707	CODE:
		1708	RETVAL = cctx_count;
		1709	OUTPUT:
		1710	RETVAL
		1711
		1712	int
		1713	cctx_idle ()
		1714	CODE:
		1715	RETVAL = cctx_idle;
		1716	OUTPUT:
		1717	RETVAL
1054		1718
1055	void	1719	void
1056	yield(...)	1720	list ()
1057	PROTOTYPE: @	1721	PPCODE:
		1722	{
		1723	struct coro *coro;
		1724	for (coro = coro_first; coro; coro = coro->next)
		1725	if (coro->hv)
		1726	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1727	}
		1728
		1729	void
		1730	call (Coro::State coro, SV *coderef)
		1731	ALIAS:
		1732	eval = 1
		1733	CODE:
		1734	{
		1735	if (coro->mainstack)
		1736	{
		1737	struct coro temp;
		1738
		1739	if (!(coro->flags & CF_RUNNING))
		1740	{
		1741	PUTBACK;
		1742	save_perl (aTHX_ &temp);
		1743	load_perl (aTHX_ coro);
		1744	}
		1745
		1746	{
		1747	dSP;
		1748	ENTER;
		1749	SAVETMPS;
		1750	PUTBACK;
		1751	PUSHSTACK;
		1752	PUSHMARK (SP);
		1753
		1754	if (ix)
		1755	eval_sv (coderef, 0);
		1756	else
		1757	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1758
		1759	POPSTACK;
		1760	SPAGAIN;
		1761	FREETMPS;
		1762	LEAVE;
		1763	PUTBACK;
		1764	}
		1765
		1766	if (!(coro->flags & CF_RUNNING))
		1767	{
		1768	save_perl (aTHX_ coro);
		1769	load_perl (aTHX_ &temp);
		1770	SPAGAIN;
		1771	}
		1772	}
		1773	}
		1774
		1775	SV *
		1776	is_ready (Coro::State coro)
		1777	PROTOTYPE: $
		1778	ALIAS:
		1779	is_ready = CF_READY
		1780	is_running = CF_RUNNING
		1781	is_new = CF_NEW
		1782	is_destroyed = CF_DESTROYED
		1783	CODE:
		1784	RETVAL = boolSV (coro->flags & ix);
		1785	OUTPUT:
		1786	RETVAL
		1787
		1788	void
		1789	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1790
		1791	SV *
		1792	has_stack (Coro::State coro)
		1793	PROTOTYPE: $
		1794	CODE:
		1795	RETVAL = boolSV (!!coro->cctx);
		1796	OUTPUT:
		1797	RETVAL
		1798
		1799	int
		1800	is_traced (Coro::State coro)
		1801	PROTOTYPE: $
		1802	CODE:
		1803	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1804	OUTPUT:
		1805	RETVAL
		1806
		1807	IV
		1808	rss (Coro::State coro)
		1809	PROTOTYPE: $
		1810	ALIAS:
		1811	usecount = 1
1058	CODE:	1812	CODE:
1059	SV *yieldstack;	1813	switch (ix)
1060	SV *sv;	1814	{
1061	AV *defav = GvAV (PL_defgv);	1815	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1062	struct coro *prev, *next;	1816	case 1: RETVAL = coro->usecount; break;
1063
1064	yieldstack = *hv_fetch (
1065	(HV *)SvRV (GvSV (coro_current)),
1066	"yieldstack", sizeof ("yieldstack") - 1,
1067	0	1817	}
1068	);	1818	OUTPUT:
		1819	RETVAL
1069		1820
1070	/* set up @_ -- ugly */	1821	void
1071	av_clear (defav);	1822	force_cctx ()
1072	av_fill (defav, items - 1);	1823	CODE:
1073	while (items--)	1824	struct coro *coro = SvSTATE (coro_current);
1074	av_store (defav, items, SvREFCNT_inc (ST(items)));	1825	coro->cctx->idle_sp = 0;
1075
1076	sv = av_pop ((AV *)SvRV (yieldstack));
1077	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
1078	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
1079	SvREFCNT_dec (sv);
1080
1081	transfer (aTHX_ prev, next, 0);
1082		1826
1083	MODULE = Coro::State PACKAGE = Coro	1827	MODULE = Coro::State PACKAGE = Coro
1084		1828
1085	# this is slightly dirty (should expose a c-level api)
1086
1087	BOOT:	1829	BOOT:
1088	{	1830	{
1089	int i;	1831	int i;
		1832
		1833	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1834	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1835	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1836
		1837	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1838	SvREADONLY_on (coro_current);
		1839
1090	HV *stash = gv_stashpv ("Coro", TRUE);	1840	coro_stash = gv_stashpv ("Coro", TRUE);
1091		1841
1092	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1842	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1093	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1843	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1094	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1844	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1095	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1845	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1096	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1846	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1097	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1847	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1098
1099	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1100	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1101		1848
1102	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1849	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1103	coro_ready[i] = newAV ();	1850	coro_ready[i] = newAV ();
1104		1851
1105	{	1852	{
1106	SV *sv = perl_get_sv("Coro::API", 1);	1853	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1854	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1107		1855
1108	coroapi.schedule = api_schedule;	1856	coroapi.schedule = api_schedule;
1109	coroapi.cede = api_cede;	1857	coroapi.cede = api_cede;
		1858	coroapi.cede_notself = api_cede_notself;
1110	coroapi.ready = api_ready;	1859	coroapi.ready = api_ready;
		1860	coroapi.is_ready = api_is_ready;
1111	coroapi.nready = &coro_nready;	1861	coroapi.nready = &coro_nready;
1112	coroapi.current = coro_current;	1862	coroapi.current = coro_current;
1113		1863
1114	GCoroAPI = &coroapi;	1864	GCoroAPI = &coroapi;
1115	sv_setiv(sv, (IV)&coroapi);	1865	sv_setiv (sv, (IV)&coroapi);
1116	SvREADONLY_on(sv);	1866	SvREADONLY_on (sv);
1117	}	1867	}
1118	}	1868	}
1119		1869
1120	#if !PERL_MICRO
1121
1122	void	1870	void
1123	ready(self)	1871	_set_current (SV *current)
1124	SV * self
1125	PROTOTYPE: $	1872	PROTOTYPE: $
1126	CODE:	1873	CODE:
1127	api_ready (self);	1874	SvREFCNT_dec (SvRV (coro_current));
1128		1875	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1129	#endif
1130		1876
1131	int	1877	int
		1878	prio (Coro::State coro, int newprio = 0)
		1879	ALIAS:
		1880	nice = 1
		1881	CODE:
		1882	{
		1883	RETVAL = coro->prio;
		1884
		1885	if (items > 1)
		1886	{
		1887	if (ix)
		1888	newprio = coro->prio - newprio;
		1889
		1890	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1891	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1892
		1893	coro->prio = newprio;
		1894	}
		1895	}
		1896	OUTPUT:
		1897	RETVAL
		1898
		1899	SV *
		1900	ready (SV *self)
		1901	PROTOTYPE: $
		1902	CODE:
		1903	RETVAL = boolSV (api_ready (self));
		1904	OUTPUT:
		1905	RETVAL
		1906
		1907	int
1132	nready(...)	1908	nready (...)
1133	PROTOTYPE:	1909	PROTOTYPE:
1134	CODE:	1910	CODE:
1135	RETVAL = coro_nready;	1911	RETVAL = coro_nready;
1136	OUTPUT:	1912	OUTPUT:
1137	RETVAL	1913	RETVAL
1138		1914
1139	void	1915	void
1140	schedule(...)	1916	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1917	PROTOTYPE: $;$
		1918	CODE:
		1919	SvREFCNT_dec (self->throw);
		1920	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1921
		1922	void
		1923	swap_defsv (Coro::State self)
1141	PROTOTYPE:	1924	PROTOTYPE: $
		1925	ALIAS:
		1926	swap_defav = 1
		1927	CODE:
		1928	if (!self->slot)
		1929	croak ("cannot swap state with coroutine that has no saved state");
		1930	else
		1931	{
		1932	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1933	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		1934
		1935	SV *tmp = *src; *src = *dst; *dst = tmp;
		1936	}
		1937
		1938	# for async_pool speedup
		1939	void
		1940	_pool_1 (SV *cb)
1142	CODE:	1941	CODE:
1143	api_schedule ();	1942	{
		1943	struct coro *coro = SvSTATE (coro_current);
		1944	HV *hv = (HV *)SvRV (coro_current);
		1945	AV *defav = GvAV (PL_defgv);
		1946	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		1947	AV *invoke_av;
		1948	int i, len;
		1949
		1950	if (!invoke)
		1951	{
		1952	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1953	croak ("\3async_pool terminate\2\n");
		1954	}
		1955
		1956	SvREFCNT_dec (coro->saved_deffh);
		1957	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		1958
		1959	hv_store (hv, "desc", sizeof ("desc") - 1,
		1960	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		1961
		1962	invoke_av = (AV *)SvRV (invoke);
		1963	len = av_len (invoke_av);
		1964
		1965	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		1966
		1967	if (len > 0)
		1968	{
		1969	av_fill (defav, len - 1);
		1970	for (i = 0; i < len; ++i)
		1971	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		1972	}
		1973
		1974	SvREFCNT_dec (invoke);
		1975	}
1144		1976
1145	void	1977	void
1146	cede(...)	1978	_pool_2 (SV *cb)
1147	PROTOTYPE:
1148	CODE:	1979	CODE:
1149	api_cede ();	1980	{
		1981	struct coro *coro = SvSTATE (coro_current);
1150		1982
		1983	sv_setsv (cb, &PL_sv_undef);
		1984
		1985	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		1986	coro->saved_deffh = 0;
		1987
		1988	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		1989	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		1990	{
		1991	SvREFCNT_dec (PL_diehook); PL_diehook = 0;
		1992	croak ("\3async_pool terminate\2\n");
		1993	}
		1994
		1995	av_clear (GvAV (PL_defgv));
		1996	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		1997	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		1998
		1999	coro->prio = 0;
		2000
		2001	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		2002	api_trace (coro_current, 0);
		2003
		2004	av_push (av_async_pool, newSVsv (coro_current));
		2005	}
		2006
		2007
		2008	MODULE = Coro::State PACKAGE = Coro::AIO
		2009
		2010	SV *
		2011	_get_state ()
		2012	CODE:
		2013	{
		2014	struct io_state *data;
		2015
		2016	RETVAL = newSV (sizeof (struct io_state));
		2017	data = (struct io_state *)SvPVX (RETVAL);
		2018	SvCUR_set (RETVAL, sizeof (struct io_state));
		2019	SvPOK_only (RETVAL);
		2020
		2021	data->errorno = errno;
		2022	data->laststype = PL_laststype;
		2023	data->laststatval = PL_laststatval;
		2024	data->statcache = PL_statcache;
		2025	}
		2026	OUTPUT:
		2027	RETVAL
		2028
		2029	void
		2030	_set_state (char *data_)
		2031	PROTOTYPE: $
		2032	CODE:
		2033	{
		2034	struct io_state *data = (void *)data_;
		2035
		2036	errno = data->errorno;
		2037	PL_laststype = data->laststype;
		2038	PL_laststatval = data->laststatval;
		2039	PL_statcache = data->statcache;
		2040	}
		2041

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