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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.91 by root, Sat Nov 25 01:14:11 2006 UTC vs.
Revision 1.242 by root, Thu Aug 14 12:48:20 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 <errno.h>	85	/* 5.8.8 */
		86	#ifndef GV_NOTQUAL
		87	# define GV_NOTQUAL 0
		88	#endif
		89	#ifndef newSV
		90	# define newSV(l) NEWSV(0,l)
		91	#endif
		92
		93	/* 5.11 */
		94	#ifndef CxHASARGS
		95	# define CxHASARGS(cx) (cx)->blk_sub.hasargs
		96	#endif
		97
		98	/* 5.8.7 */
		99	#ifndef SvRV_set
		100	# define SvRV_set(s,v) SvRV(s) = (v)
		101	#endif
33		102
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	103	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	104	# undef CORO_STACKGUARD
36	#endif
37
38	#ifndef STACKGUARD
39	# define STACKGUARD 0
40	#endif
41
42	#ifdef HAVE_MMAP
43	# include <unistd.h>
44	# include <sys/mman.h>
45	# ifndef MAP_ANONYMOUS
46	# ifdef MAP_ANON
47	# define MAP_ANONYMOUS MAP_ANON
48	# else
49	# undef HAVE_MMAP
50	# endif
51	# endif	105	#endif
52	# include <limits.h>	106
53	# ifndef PAGESIZE	107	#ifndef CORO_STACKGUARD
54	# define PAGESIZE pagesize	108	# define CORO_STACKGUARD 0
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;
57	# else
58	# define BOOT_PAGESIZE
59	# endif	109	#endif
60	#endif
61		110
62	#define SUB_INIT "Coro::State::initialize"	111	/* prefer perl internal functions over our own? */
		112	#ifndef CORO_PREFER_PERL_FUNCTIONS
		113	# define CORO_PREFER_PERL_FUNCTIONS 0
		114	#endif
63		115
64	/* The next macro should declare a variable stacklevel that contains and approximation	116	/* The next macros try to return the current stack pointer, in an as
65	* to the current C stack pointer. Its property is that it changes with each call	117	* portable way as possible. */
66	* and should be unique. */	118	#define dSTACKLEVEL volatile char stacklevel
67	#define dSTACKLEVEL void *stacklevel = &stacklevel	119	#define STACKLEVEL ((void *)&stacklevel)
68		120
69	#define IN_DESTRUCT (PL_main_cv == Nullcv)	121	#define IN_DESTRUCT (PL_main_cv == Nullcv)
70		122
71	#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))
72		137
73	#include "CoroAPI.h"	138	#include "CoroAPI.h"
74		139
75	#ifdef USE_ITHREADS	140	#ifdef USE_ITHREADS
76	static perl_mutex coro_mutex;	141	static perl_mutex coro_mutex;
…		…
79	#else	144	#else
80	# define LOCK (void)0	145	# define LOCK (void)0
81	# define UNLOCK (void)0	146	# define UNLOCK (void)0
82	#endif	147	#endif
83		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;
84	static struct CoroAPI coroapi;	159	static struct CoroAPI coroapi;
85	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;
86	static HV *coro_state_stash, *coro_stash;	162	static HV *coro_state_stash, *coro_stash;
87	static SV *coro_mortal; /* will be freed after next transfer */	163	static volatile SV *coro_mortal; /* will be freed after next transfer */
88		164
89	/* this is actually not just 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	/* Coro::AnyEvent */
		177	static SV *sv_activity;
		178
		179	static struct coro_cctx *cctx_first;
		180	static int cctx_count, cctx_idle;
		181
		182	enum {
		183	CC_MAPPED = 0x01,
		184	CC_NOREUSE = 0x02, /* throw this away after tracing */
		185	CC_TRACE = 0x04,
		186	CC_TRACE_SUB = 0x08, /* trace sub calls */
		187	CC_TRACE_LINE = 0x10, /* trace each statement */
		188	CC_TRACE_ALL = CC_TRACE_SUB | CC_TRACE_LINE,
		189	};
		190
		191	/* this is a structure representing a c-level coroutine */
90	typedef struct coro_stack {	192	typedef struct coro_cctx {
91	struct coro_stack *next;	193	struct coro_cctx *next;
92		194
93	void *idle_sp;	195	/* the stack */
94	void *sptr;	196	void *sptr;
95	long ssize; /* positive == mmap, otherwise malloc */	197	size_t ssize;
96		198
97	/* cpu state */	199	/* cpu state */
		200	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		201	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		202	JMPENV *top_env;
98	coro_context cctx;	203	coro_context cctx;
99	} coro_stack;
100		204
101	static coro_stack *main_stack;	205	#if CORO_USE_VALGRIND
		206	int valgrind_id;
		207	#endif
		208	unsigned char flags;
		209	} coro_cctx;
102		210
		211	enum {
		212	CF_RUNNING = 0x0001, /* coroutine is running */
		213	CF_READY = 0x0002, /* coroutine is ready */
		214	CF_NEW = 0x0004, /* has never been switched to */
		215	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		216	};
		217
		218	/* the structure where most of the perl state is stored, overlaid on the cxstack */
		219	typedef struct {
		220	SV *defsv;
		221	AV *defav;
		222	SV *errsv;
		223	SV *irsgv;
		224	#define VAR(name,type) type name;
		225	# include "state.h"
		226	#undef VAR
		227	} perl_slots;
		228
		229	#define SLOT_COUNT ((sizeof (perl_slots) + sizeof (PERL_CONTEXT) - 1) / sizeof (PERL_CONTEXT))
		230
		231	/* this is a structure representing a perl-level coroutine */
103	struct coro {	232	struct coro {
104	/* optionally saved, might be zero */	233	/* the c coroutine allocated to this perl coroutine, if any */
105	AV *defav;	234	coro_cctx *cctx;
106	SV *defsv;
107	SV *errsv;
108
109	/* saved global state not related to stacks */
110	U8 dowarn;
111	I32 in_eval;
112		235
113	/* the c stack, if any */	236	/* process data */
114	coro_stack *stack;
115
116	/* the stacks and related info (callchain etc..) */
117	PERL_SI *curstackinfo;
118	AV *curstack;
119	AV *mainstack;	237	AV *mainstack;
120	SV **stack_sp;	238	perl_slots *slot; /* basically the saved sp */
121	OP *op;	239
122	SV **curpad;	240	AV *args; /* data associated with this coroutine (initial args) */
123	AV *comppad;	241	int refcnt; /* coroutines are refcounted, yes */
124	CV *compcv;	242	int flags; /* CF_ flags */
125	SV **stack_base;	243	HV *hv; /* the perl hash associated with this coro, if any */
126	SV **stack_max;	244
127	SV **tmps_stack;	245	/* statistics */
128	I32 tmps_floor;	246	int usecount; /* number of transfers to this coro */
129	I32 tmps_ix;
130	I32 tmps_max;
131	I32 *markstack;
132	I32 *markstack_ptr;
133	I32 *markstack_max;
134	I32 *scopestack;
135	I32 scopestack_ix;
136	I32 scopestack_max;
137	ANY *savestack;
138	I32 savestack_ix;
139	I32 savestack_max;
140	OP **retstack;
141	I32 retstack_ix;
142	I32 retstack_max;
143	PMOP *curpm;
144	COP *curcop;
145	JMPENV *top_env;
146		247
147	/* coro process data */	248	/* coro process data */
148	int prio;	249	int prio;
		250	SV *throw; /* exception to be thrown */
149		251
150	/* data associated with this coroutine (initial args) */	252	/* async_pool */
151	AV *args;	253	SV *saved_deffh;
152	int refcnt;	254
		255	/* linked list */
		256	struct coro *next, *prev;
153	};	257	};
154		258
155	typedef struct coro *Coro__State;	259	typedef struct coro *Coro__State;
156	typedef struct coro *Coro__State_or_hashref;	260	typedef struct coro *Coro__State_or_hashref;
157		261
		262	/** Coro ********************************************************************/
		263
		264	#define PRIO_MAX 3
		265	#define PRIO_HIGH 1
		266	#define PRIO_NORMAL 0
		267	#define PRIO_LOW -1
		268	#define PRIO_IDLE -3
		269	#define PRIO_MIN -4
		270
		271	/* for Coro.pm */
		272	static SV *coro_current;
		273	static SV *coro_readyhook;
		274	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
		275	static int coro_nready;
		276	static struct coro *coro_first;
		277
		278	/** lowlevel stuff **********************************************************/
		279
		280	static SV *
		281	coro_get_sv (pTHX_ const char *name, int create)
		282	{
		283	#if PERL_VERSION_ATLEAST (5,10,0)
		284	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		285	get_sv (name, create);
		286	#endif
		287	return get_sv (name, create);
		288	}
		289
		290	static AV *
		291	coro_get_av (pTHX_ const char *name, int create)
		292	{
		293	#if PERL_VERSION_ATLEAST (5,10,0)
		294	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		295	get_av (name, create);
		296	#endif
		297	return get_av (name, create);
		298	}
		299
		300	static HV *
		301	coro_get_hv (pTHX_ const char *name, int create)
		302	{
		303	#if PERL_VERSION_ATLEAST (5,10,0)
		304	/* silence stupid and wrong 5.10 warning that I am unable to switch off */
		305	get_hv (name, create);
		306	#endif
		307	return get_hv (name, create);
		308	}
		309
158	static AV *	310	static AV *
159	coro_clone_padlist (pTHX_ CV *cv)	311	coro_clone_padlist (pTHX_ CV *cv)
160	{	312	{
161	AV *padlist = CvPADLIST (cv);	313	AV *padlist = CvPADLIST (cv);
162	AV *newpadlist, *newpad;	314	AV *newpadlist, *newpad;
163		315
164	newpadlist = newAV ();	316	newpadlist = newAV ();
165	AvREAL_off (newpadlist);	317	AvREAL_off (newpadlist);
166	#if PERL_VERSION < 9	318	#if PERL_VERSION_ATLEAST (5,10,0)
		319	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		320	#else
167	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	321	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
168	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
170	#endif	322	#endif
171	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	323	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
172	--AvFILLp (padlist);	324	--AvFILLp (padlist);
173		325
174	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	326	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
209		361
210	/* casting is fun. */	362	/* casting is fun. */
211	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	363	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
212	free_padlist (aTHX_ padlist);	364	free_padlist (aTHX_ padlist);
213		365
214	SvREFCNT_dec (av);
215
216	return 0;	366	return 0;
217	}	367	}
218		368
219	#define PERL_MAGIC_coro PERL_MAGIC_ext	369	#define CORO_MAGIC_type_cv PERL_MAGIC_ext
		370	#define CORO_MAGIC_type_state PERL_MAGIC_ext
220		371
221	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	372	static MGVTBL coro_cv_vtbl = {
		373	0, 0, 0, 0,
		374	coro_cv_free
		375	};
		376
		377	#define CORO_MAGIC(sv,type) \
		378	SvMAGIC (sv) \
		379	? SvMAGIC (sv)->mg_type == type \
		380	? SvMAGIC (sv) \
		381	: mg_find (sv, type) \
		382	: 0
		383
		384	#define CORO_MAGIC_cv(cv) CORO_MAGIC (((SV *)(cv)), CORO_MAGIC_type_cv)
		385	#define CORO_MAGIC_state(sv) CORO_MAGIC (((SV *)(sv)), CORO_MAGIC_type_state)
		386
		387	static struct coro *
		388	SvSTATE_ (pTHX_ SV *coro)
		389	{
		390	HV *stash;
		391	MAGIC *mg;
		392
		393	if (SvROK (coro))
		394	coro = SvRV (coro);
		395
		396	if (expect_false (SvTYPE (coro) != SVt_PVHV))
		397	croak ("Coro::State object required");
		398
		399	stash = SvSTASH (coro);
		400	if (expect_false (stash != coro_stash && stash != coro_state_stash))
		401	{
		402	/* very slow, but rare, check */
		403	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		404	croak ("Coro::State object required");
		405	}
		406
		407	mg = CORO_MAGIC_state (coro);
		408	return (struct coro *)mg->mg_ptr;
		409	}
		410
		411	#define SvSTATE(sv) SvSTATE_ (aTHX_ (sv))
222		412
223	/* the next two functions merely cache the padlists */	413	/* the next two functions merely cache the padlists */
224	static void	414	static void
225	get_padlist (pTHX_ CV *cv)	415	get_padlist (pTHX_ CV *cv)
226	{	416	{
227	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	417	MAGIC *mg = CORO_MAGIC_cv (cv);
		418	AV *av;
228		419
229	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	420	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
230	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	421	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
231	else	422	else
232	{	423	{
233	#if 0	424	#if CORO_PREFER_PERL_FUNCTIONS
234	/* this should work - but it doesn't :( */	425	/* this is probably cleaner, but also slower? */
235	CV *cp = Perl_cv_clone (aTHX_ cv);	426	CV *cp = Perl_cv_clone (cv);
236	CvPADLIST (cv) = CvPADLIST (cp);	427	CvPADLIST (cv) = CvPADLIST (cp);
237	CvPADLIST (cp) = 0;	428	CvPADLIST (cp) = 0;
238	SvREFCNT_dec (cp);	429	SvREFCNT_dec (cp);
239	#else	430	#else
240	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	431	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
…		…
243	}	434	}
244		435
245	static void	436	static void
246	put_padlist (pTHX_ CV *cv)	437	put_padlist (pTHX_ CV *cv)
247	{	438	{
248	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	439	MAGIC *mg = CORO_MAGIC_cv (cv);
		440	AV *av;
249		441
250	if (!mg)	442	if (expect_false (!mg))
251	{	443	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
252	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
253	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
254	mg->mg_virtual = &vtbl_coro;
255	mg->mg_obj = (SV *)newAV ();
256	}
257		444
258	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	445	av = (AV *)mg->mg_obj;
259	}
260		446
261	#define SB do {	447	if (expect_false (AvFILLp (av) >= AvMAX (av)))
262	#define SE } while (0)	448	av_extend (av, AvMAX (av) + 1);
263		449
264	#define LOAD(state) load_state(aTHX_ (state));	450	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
265	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	451	}
266		452
267	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	453	/** load & save, init *******************************************************/
268		454
269	static void	455	static void
270	load_state(pTHX_ Coro__State c)	456	load_perl (pTHX_ Coro__State c)
271	{	457	{
272	PL_dowarn = c->dowarn;	458	perl_slots *slot = c->slot;
273	PL_in_eval = c->in_eval;	459	c->slot = 0;
274		460
275	PL_curstackinfo = c->curstackinfo;
276	PL_curstack = c->curstack;
277	PL_mainstack = c->mainstack;	461	PL_mainstack = c->mainstack;
278	PL_stack_sp = c->stack_sp;
279	PL_op = c->op;
280	PL_curpad = c->curpad;
281	PL_comppad = c->comppad;
282	PL_compcv = c->compcv;
283	PL_stack_base = c->stack_base;
284	PL_stack_max = c->stack_max;
285	PL_tmps_stack = c->tmps_stack;
286	PL_tmps_floor = c->tmps_floor;
287	PL_tmps_ix = c->tmps_ix;
288	PL_tmps_max = c->tmps_max;
289	PL_markstack = c->markstack;
290	PL_markstack_ptr = c->markstack_ptr;
291	PL_markstack_max = c->markstack_max;
292	PL_scopestack = c->scopestack;
293	PL_scopestack_ix = c->scopestack_ix;
294	PL_scopestack_max = c->scopestack_max;
295	PL_savestack = c->savestack;
296	PL_savestack_ix = c->savestack_ix;
297	PL_savestack_max = c->savestack_max;
298	#if PERL_VERSION < 9
299	PL_retstack = c->retstack;
300	PL_retstack_ix = c->retstack_ix;
301	PL_retstack_max = c->retstack_max;
302	#endif
303	PL_curpm = c->curpm;
304	PL_curcop = c->curcop;
305	PL_top_env = c->top_env;
306		462
307	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	463	GvSV (PL_defgv) = slot->defsv;
308	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	464	GvAV (PL_defgv) = slot->defav;
309	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	465	GvSV (PL_errgv) = slot->errsv;
		466	GvSV (irsgv) = slot->irsgv;
		467
		468	#define VAR(name,type) PL_ ## name = slot->name;
		469	# include "state.h"
		470	#undef VAR
310		471
311	{	472	{
312	dSP;	473	dSP;
		474
313	CV *cv;	475	CV *cv;
314		476
315	/* now do the ugly restore mess */	477	/* now do the ugly restore mess */
316	while ((cv = (CV *)POPs))	478	while (expect_true (cv = (CV *)POPs))
317	{	479	{
318	AV *padlist = (AV *)POPs;
319
320	if (padlist)
321	{
322	put_padlist (aTHX_ cv); /* mark this padlist as available */	480	put_padlist (aTHX_ cv); /* mark this padlist as available */
323	CvPADLIST(cv) = padlist;	481	CvDEPTH (cv) = PTR2IV (POPs);
324	}	482	CvPADLIST (cv) = (AV *)POPs;
325
326	++CvDEPTH(cv);
327	}	483	}
328		484
329	PUTBACK;	485	PUTBACK;
330	}	486	}
331	}	487	}
332		488
333	static void	489	static void
334	save_state(pTHX_ Coro__State c, int flags)	490	save_perl (pTHX_ Coro__State c)
335	{	491	{
336	{	492	{
337	dSP;	493	dSP;
338	I32 cxix = cxstack_ix;	494	I32 cxix = cxstack_ix;
339	PERL_CONTEXT *ccstk = cxstack;	495	PERL_CONTEXT *ccstk = cxstack;
…		…
342	/*	498	/*
343	* the worst thing you can imagine happens first - we have to save	499	* the worst thing you can imagine happens first - we have to save
344	* (and reinitialize) all cv's in the whole callchain :(	500	* (and reinitialize) all cv's in the whole callchain :(
345	*/	501	*/
346		502
347	PUSHs (Nullsv);	503	XPUSHs (Nullsv);
348	/* this loop was inspired by pp_caller */	504	/* this loop was inspired by pp_caller */
349	for (;;)	505	for (;;)
350	{	506	{
351	while (cxix >= 0)	507	while (expect_true (cxix >= 0))
352	{	508	{
353	PERL_CONTEXT *cx = &ccstk[cxix--];	509	PERL_CONTEXT *cx = &ccstk[cxix--];
354		510
355	if (CxTYPE(cx) == CXt_SUB)	511	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
356	{	512	{
357	CV *cv = cx->blk_sub.cv;	513	CV *cv = cx->blk_sub.cv;
		514
358	if (CvDEPTH(cv))	515	if (expect_true (CvDEPTH (cv)))
359	{	516	{
360	EXTEND (SP, CvDEPTH(cv)*2);	517	EXTEND (SP, 3);
361
362	while (--CvDEPTH(cv))
363	{
364	/* this tells the restore code to increment CvDEPTH */
365	PUSHs (Nullsv);
366	PUSHs ((SV *)cv);
367	}
368
369	PUSHs ((SV *)CvPADLIST(cv));	518	PUSHs ((SV *)CvPADLIST (cv));
		519	PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
370	PUSHs ((SV *)cv);	520	PUSHs ((SV *)cv);
371		521
		522	CvDEPTH (cv) = 0;
372	get_padlist (aTHX_ cv);	523	get_padlist (aTHX_ cv);
373	}	524	}
374	}	525	}
375	#ifdef CXt_FORMAT
376	else if (CxTYPE(cx) == CXt_FORMAT)
377	{
378	/* I never used formats, so how should I know how these are implemented? */
379	/* my bold guess is as a simple, plain sub... */
380	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
381	}
382	#endif
383	}	526	}
384		527
385	if (top_si->si_type == PERLSI_MAIN)	528	if (expect_true (top_si->si_type == PERLSI_MAIN))
386	break;	529	break;
387		530
388	top_si = top_si->si_prev;	531	top_si = top_si->si_prev;
389	ccstk = top_si->si_cxstack;	532	ccstk = top_si->si_cxstack;
390	cxix = top_si->si_cxix;	533	cxix = top_si->si_cxix;
391	}	534	}
392		535
393	PUTBACK;	536	PUTBACK;
394	}	537	}
395		538
396	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	539	/* allocate some space on the context stack for our purposes */
397	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	540	/* we manually unroll here, as usually 2 slots is enough */
398	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	541	if (SLOT_COUNT >= 1) CXINC;
		542	if (SLOT_COUNT >= 2) CXINC;
		543	if (SLOT_COUNT >= 3) CXINC;
		544	{
		545	int i;
		546	for (i = 3; i < SLOT_COUNT; ++i)
		547	CXINC;
		548	}
		549	cxstack_ix -= SLOT_COUNT; /* undo allocation */
399		550
400	c->dowarn = PL_dowarn;
401	c->in_eval = PL_in_eval;
402
403	c->curstackinfo = PL_curstackinfo;
404	c->curstack = PL_curstack;
405	c->mainstack = PL_mainstack;	551	c->mainstack = PL_mainstack;
406	c->stack_sp = PL_stack_sp;	552
407	c->op = PL_op;	553	{
408	c->curpad = PL_curpad;	554	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
409	c->comppad = PL_comppad;	555
410	c->compcv = PL_compcv;	556	slot->defav = GvAV (PL_defgv);
411	c->stack_base = PL_stack_base;	557	slot->defsv = DEFSV;
412	c->stack_max = PL_stack_max;	558	slot->errsv = ERRSV;
413	c->tmps_stack = PL_tmps_stack;	559	slot->irsgv = GvSV (irsgv);
414	c->tmps_floor = PL_tmps_floor;	560
415	c->tmps_ix = PL_tmps_ix;	561	#define VAR(name,type) slot->name = PL_ ## name;
416	c->tmps_max = PL_tmps_max;	562	# include "state.h"
417	c->markstack = PL_markstack;	563	#undef VAR
418	c->markstack_ptr = PL_markstack_ptr;	564	}
419	c->markstack_max = PL_markstack_max;
420	c->scopestack = PL_scopestack;
421	c->scopestack_ix = PL_scopestack_ix;
422	c->scopestack_max = PL_scopestack_max;
423	c->savestack = PL_savestack;
424	c->savestack_ix = PL_savestack_ix;
425	c->savestack_max = PL_savestack_max;
426	#if PERL_VERSION < 9
427	c->retstack = PL_retstack;
428	c->retstack_ix = PL_retstack_ix;
429	c->retstack_max = PL_retstack_max;
430	#endif
431	c->curpm = PL_curpm;
432	c->curcop = PL_curcop;
433	c->top_env = PL_top_env;
434	}	565	}
435		566
436	/*	567	/*
437	* allocate various perl stacks. This is an exact copy	568	* allocate various perl stacks. This is an exact copy
438	* of perl.c:init_stacks, except that it uses less memory	569	* of perl.c:init_stacks, except that it uses less memory
439	* on the (sometimes correct) assumption that coroutines do	570	* on the (sometimes correct) assumption that coroutines do
440	* not usually need a lot of stackspace.	571	* not usually need a lot of stackspace.
441	*/	572	*/
		573	#if CORO_PREFER_PERL_FUNCTIONS
		574	# define coro_init_stacks init_stacks
		575	#else
442	static void	576	static void
443	coro_init_stacks (pTHX)	577	coro_init_stacks (pTHX)
444	{	578	{
445	LOCK;	579	PL_curstackinfo = new_stackinfo(32, 8);
446
447	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
448	PL_curstackinfo->si_type = PERLSI_MAIN;	580	PL_curstackinfo->si_type = PERLSI_MAIN;
449	PL_curstack = PL_curstackinfo->si_stack;	581	PL_curstack = PL_curstackinfo->si_stack;
450	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	582	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
451		583
452	PL_stack_base = AvARRAY(PL_curstack);	584	PL_stack_base = AvARRAY(PL_curstack);
453	PL_stack_sp = PL_stack_base;	585	PL_stack_sp = PL_stack_base;
454	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	586	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
455		587
456	New(50,PL_tmps_stack,96,SV*);	588	New(50,PL_tmps_stack,32,SV*);
457	PL_tmps_floor = -1;	589	PL_tmps_floor = -1;
458	PL_tmps_ix = -1;	590	PL_tmps_ix = -1;
459	PL_tmps_max = 96;	591	PL_tmps_max = 32;
460		592
461	New(54,PL_markstack,16,I32);	593	New(54,PL_markstack,16,I32);
462	PL_markstack_ptr = PL_markstack;	594	PL_markstack_ptr = PL_markstack;
463	PL_markstack_max = PL_markstack + 16;	595	PL_markstack_max = PL_markstack + 16;
464		596
465	#ifdef SET_MARK_OFFSET	597	#ifdef SET_MARK_OFFSET
466	SET_MARK_OFFSET;	598	SET_MARK_OFFSET;
467	#endif	599	#endif
468		600
469	New(54,PL_scopestack,16,I32);	601	New(54,PL_scopestack,8,I32);
470	PL_scopestack_ix = 0;	602	PL_scopestack_ix = 0;
471	PL_scopestack_max = 16;	603	PL_scopestack_max = 8;
472		604
473	New(54,PL_savestack,96,ANY);	605	New(54,PL_savestack,24,ANY);
474	PL_savestack_ix = 0;	606	PL_savestack_ix = 0;
475	PL_savestack_max = 96;	607	PL_savestack_max = 24;
476		608
477	#if PERL_VERSION < 9	609	#if !PERL_VERSION_ATLEAST (5,10,0)
478	New(54,PL_retstack,8,OP*);	610	New(54,PL_retstack,4,OP*);
479	PL_retstack_ix = 0;	611	PL_retstack_ix = 0;
480	PL_retstack_max = 8;	612	PL_retstack_max = 4;
481	#endif	613	#endif
482
483	UNLOCK;
484	}	614	}
		615	#endif
485		616
486	/*	617	/*
487	* destroy the stacks, the callchain etc...	618	* destroy the stacks, the callchain etc...
488	*/	619	*/
489	static void	620	static void
490	destroy_stacks(pTHX)	621	coro_destroy_stacks (pTHX)
491	{	622	{
492	if (!IN_DESTRUCT)
493	{
494	/* is this ugly, I ask? */
495	LEAVE_SCOPE (0);
496
497	/* sure it is, but more important: is it correct?? :/ */
498	FREETMPS;
499
500	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
501	}
502
503	while (PL_curstackinfo->si_next)	623	while (PL_curstackinfo->si_next)
504	PL_curstackinfo = PL_curstackinfo->si_next;	624	PL_curstackinfo = PL_curstackinfo->si_next;
505		625
506	while (PL_curstackinfo)	626	while (PL_curstackinfo)
507	{	627	{
508	PERL_SI *p = PL_curstackinfo->si_prev;	628	PERL_SI *p = PL_curstackinfo->si_prev;
509		629
510	{ /*D*//*remove*/
511	dSP;
512	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
513	PUTBACK; /* possibly superfluous */
514	}
515
516	if (!IN_DESTRUCT)	630	if (!IN_DESTRUCT)
517	{
518	dounwind (-1);/*D*//*remove*/
519	SvREFCNT_dec (PL_curstackinfo->si_stack);	631	SvREFCNT_dec (PL_curstackinfo->si_stack);
520	}
521		632
522	Safefree (PL_curstackinfo->si_cxstack);	633	Safefree (PL_curstackinfo->si_cxstack);
523	Safefree (PL_curstackinfo);	634	Safefree (PL_curstackinfo);
524	PL_curstackinfo = p;	635	PL_curstackinfo = p;
525	}	636	}
526		637
527	Safefree (PL_tmps_stack);	638	Safefree (PL_tmps_stack);
528	Safefree (PL_markstack);	639	Safefree (PL_markstack);
529	Safefree (PL_scopestack);	640	Safefree (PL_scopestack);
530	Safefree (PL_savestack);	641	Safefree (PL_savestack);
531	#if PERL_VERSION < 9	642	#if !PERL_VERSION_ATLEAST (5,10,0)
532	Safefree (PL_retstack);	643	Safefree (PL_retstack);
533	#endif	644	#endif
534	}	645	}
535		646
		647	static size_t
		648	coro_rss (pTHX_ struct coro *coro)
		649	{
		650	size_t rss = sizeof (*coro);
		651
		652	if (coro->mainstack)
		653	{
		654	perl_slots tmp_slot;
		655	perl_slots *slot;
		656
		657	if (coro->flags & CF_RUNNING)
		658	{
		659	slot = &tmp_slot;
		660
		661	#define VAR(name,type) slot->name = PL_ ## name;
		662	# include "state.h"
		663	#undef VAR
		664	}
		665	else
		666	slot = coro->slot;
		667
		668	rss += sizeof (slot->curstackinfo);
		669	rss += (slot->curstackinfo->si_cxmax + 1) * sizeof (PERL_CONTEXT);
		670	rss += sizeof (SV) + sizeof (struct xpvav) + (1 + AvMAX (slot->curstack)) * sizeof (SV *);
		671	rss += slot->tmps_max * sizeof (SV *);
		672	rss += (slot->markstack_max - slot->markstack_ptr) * sizeof (I32);
		673	rss += slot->scopestack_max * sizeof (I32);
		674	rss += slot->savestack_max * sizeof (ANY);
		675
		676	#if !PERL_VERSION_ATLEAST (5,10,0)
		677	rss += slot->retstack_max * sizeof (OP *);
		678	#endif
		679	}
		680
		681	return rss;
		682	}
		683
		684	/** coroutine stack handling ************************************************/
		685
		686	static int (*orig_sigelem_get) (pTHX_ SV *sv, MAGIC *mg);
		687	static int (*orig_sigelem_set) (pTHX_ SV *sv, MAGIC *mg);
		688	static int (*orig_sigelem_clr) (pTHX_ SV *sv, MAGIC *mg);
		689
		690	/* apparently < 5.8.8 */
		691	#ifndef MgPV_nolen_const
		692	#define MgPV_nolen_const(mg) (((((int)(mg)->mg_len)) == HEf_SVKEY) ? \
		693	SvPV_nolen((SV*)((mg)->mg_ptr)) : \
		694	(const char*)(mg)->mg_ptr)
		695	#endif
		696
		697	/*
		698	* This overrides the default magic get method of %SIG elements.
		699	* The original one doesn't provide for reading back of PL_diehook/PL_warnhook
		700	* and instead of tryign to save and restore the hash elements, we just provide
		701	* readback here.
		702	* We only do this when the hook is != 0, as they are often set to 0 temporarily,
		703	* not expecting this to actually change the hook. This is a potential problem
		704	* when a schedule happens then, but we ignore this.
		705	*/
		706	static int
		707	coro_sigelem_get (pTHX_ SV *sv, MAGIC *mg)
		708	{
		709	const char *s = MgPV_nolen_const (mg);
		710
		711	if (*s == '_')
		712	{
		713	SV **svp = 0;
		714
		715	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		716	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		717
		718	if (svp)
		719	{
		720	sv_setsv (sv, *svp ? *svp : &PL_sv_undef);
		721	return 0;
		722	}
		723	}
		724
		725	return orig_sigelem_get ? orig_sigelem_get (aTHX_ sv, mg) : 0;
		726	}
		727
		728	static int
		729	coro_sigelem_clr (pTHX_ SV *sv, MAGIC *mg)
		730	{
		731	const char *s = MgPV_nolen_const (mg);
		732
		733	if (*s == '_')
		734	{
		735	SV **svp = 0;
		736
		737	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		738	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		739
		740	if (svp)
		741	{
		742	SV *old = *svp;
		743	*svp = 0;
		744	SvREFCNT_dec (old);
		745	return 0;
		746	}
		747	}
		748
		749	return orig_sigelem_clr ? orig_sigelem_clr (aTHX_ sv, mg) : 0;
		750	}
		751
		752	static int
		753	coro_sigelem_set (pTHX_ SV *sv, MAGIC *mg)
		754	{
		755	const char *s = MgPV_nolen_const (mg);
		756
		757	if (*s == '_')
		758	{
		759	SV **svp = 0;
		760
		761	if (strEQ (s, "__DIE__" )) svp = &PL_diehook;
		762	if (strEQ (s, "__WARN__")) svp = &PL_warnhook;
		763
		764	if (svp)
		765	{
		766	SV *old = *svp;
		767	*svp = newSVsv (sv);
		768	SvREFCNT_dec (old);
		769	return 0;
		770	}
		771	}
		772
		773	return orig_sigelem_set ? orig_sigelem_set (aTHX_ sv, mg) : 0;
		774	}
		775
536	static void	776	static void
537	setup_coro (struct coro *coro)	777	coro_setup (pTHX_ struct coro *coro)
538	{	778	{
539	/*	779	/*
540	* emulate part of the perl startup here.	780	* emulate part of the perl startup here.
541	*/	781	*/
542	dTHX;	782	coro_init_stacks (aTHX);
		783
		784	PL_runops = RUNOPS_DEFAULT;
		785	PL_curcop = &PL_compiling;
		786	PL_in_eval = EVAL_NULL;
		787	PL_comppad = 0;
		788	PL_curpm = 0;
		789	PL_curpad = 0;
		790	PL_localizing = 0;
		791	PL_dirty = 0;
		792	PL_restartop = 0;
		793	#if PERL_VERSION_ATLEAST (5,10,0)
		794	PL_parser = 0;
		795	#endif
		796
		797	/* recreate the die/warn hooks */
		798	PL_diehook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__DIE__" , sizeof ("__DIE__" ) - 1, 1), rv_diehook );
		799	PL_warnhook = 0; SvSetMagicSV (*hv_fetch (hv_sig, "__WARN__", sizeof ("__WARN__") - 1, 1), rv_warnhook);
		800
		801	GvSV (PL_defgv) = newSV (0);
		802	GvAV (PL_defgv) = coro->args; coro->args = 0;
		803	GvSV (PL_errgv) = newSV (0);
		804	GvSV (irsgv) = newSVpvn ("\n", 1); sv_magic (GvSV (irsgv), (SV *)irsgv, PERL_MAGIC_sv, "/", 0);
		805	PL_rs = newSVsv (GvSV (irsgv));
		806	PL_defoutgv = (GV *)SvREFCNT_inc (stdoutgv);
		807
		808	{
		809	dSP;
		810	LOGOP myop;
		811
		812	Zero (&myop, 1, LOGOP);
		813	myop.op_next = Nullop;
		814	myop.op_flags = OPf_WANT_VOID;
		815
		816	PUSHMARK (SP);
		817	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		818	PUTBACK;
		819	PL_op = (OP *)&myop;
		820	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		821	SPAGAIN;
		822	}
		823
		824	/* this newly created coroutine might be run on an existing cctx which most
		825	* likely was suspended in set_stacklevel, called from entersub.
		826	* set_stacklevl doesn't do anything on return, but entersub does LEAVE,
		827	* so we ENTER here for symmetry
		828	*/
		829	ENTER;
		830	}
		831
		832	static void
		833	coro_destroy (pTHX_ struct coro *coro)
		834	{
		835	if (!IN_DESTRUCT)
		836	{
		837	/* restore all saved variables and stuff */
		838	LEAVE_SCOPE (0);
		839	assert (PL_tmps_floor == -1);
		840
		841	/* free all temporaries */
		842	FREETMPS;
		843	assert (PL_tmps_ix == -1);
		844
		845	/* unwind all extra stacks */
		846	POPSTACK_TO (PL_mainstack);
		847
		848	/* unwind main stack */
		849	dounwind (-1);
		850	}
		851
		852	SvREFCNT_dec (GvSV (PL_defgv));
		853	SvREFCNT_dec (GvAV (PL_defgv));
		854	SvREFCNT_dec (GvSV (PL_errgv));
		855	SvREFCNT_dec (PL_defoutgv);
		856	SvREFCNT_dec (PL_rs);
		857	SvREFCNT_dec (GvSV (irsgv));
		858
		859	SvREFCNT_dec (PL_diehook);
		860	SvREFCNT_dec (PL_warnhook);
		861
		862	SvREFCNT_dec (coro->saved_deffh);
		863	SvREFCNT_dec (coro->throw);
		864
		865	coro_destroy_stacks (aTHX);
		866	}
		867
		868	static void
		869	free_coro_mortal (pTHX)
		870	{
		871	if (expect_true (coro_mortal))
		872	{
		873	SvREFCNT_dec (coro_mortal);
		874	coro_mortal = 0;
		875	}
		876	}
		877
		878	static int
		879	runops_trace (pTHX)
		880	{
		881	COP *oldcop = 0;
		882	int oldcxix = -2;
		883	struct coro *coro = SvSTATE (coro_current); /* trace cctx is tied to specific coro */
		884	coro_cctx *cctx = coro->cctx;
		885
		886	while ((PL_op = CALL_FPTR (PL_op->op_ppaddr) (aTHX)))
		887	{
		888	PERL_ASYNC_CHECK ();
		889
		890	if (cctx->flags & CC_TRACE_ALL)
		891	{
		892	if (PL_op->op_type == OP_LEAVESUB && cctx->flags & CC_TRACE_SUB)
		893	{
		894	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		895	SV **bot, **top;
		896	AV *av = newAV (); /* return values */
		897	SV **cb;
		898	dSP;
		899
		900	GV *gv = CvGV (cx->blk_sub.cv);
		901	SV *fullname = sv_2mortal (newSV (0));
		902	if (isGV (gv))
		903	gv_efullname3 (fullname, gv, 0);
		904
		905	bot = PL_stack_base + cx->blk_oldsp + 1;
		906	top = cx->blk_gimme == G_ARRAY ? SP + 1
		907	: cx->blk_gimme == G_SCALAR ? bot + 1
		908	: bot;
		909
		910	av_extend (av, top - bot);
		911	while (bot < top)
		912	av_push (av, SvREFCNT_inc (*bot++));
		913
		914	PL_runops = RUNOPS_DEFAULT;
		915	ENTER;
		916	SAVETMPS;
		917	EXTEND (SP, 3);
		918	PUSHMARK (SP);
		919	PUSHs (&PL_sv_no);
		920	PUSHs (fullname);
		921	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		922	PUTBACK;
		923	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		924	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		925	SPAGAIN;
		926	FREETMPS;
		927	LEAVE;
		928	PL_runops = runops_trace;
		929	}
		930
		931	if (oldcop != PL_curcop)
		932	{
		933	oldcop = PL_curcop;
		934
		935	if (PL_curcop != &PL_compiling)
		936	{
		937	SV **cb;
		938
		939	if (oldcxix != cxstack_ix && cctx->flags & CC_TRACE_SUB)
		940	{
		941	PERL_CONTEXT *cx = &cxstack[cxstack_ix];
		942
		943	if (CxTYPE (cx) == CXt_SUB && oldcxix < cxstack_ix)
		944	{
		945	runops_proc_t old_runops = PL_runops;
		946	dSP;
		947	GV *gv = CvGV (cx->blk_sub.cv);
		948	SV *fullname = sv_2mortal (newSV (0));
		949
		950	if (isGV (gv))
		951	gv_efullname3 (fullname, gv, 0);
		952
		953	PL_runops = RUNOPS_DEFAULT;
		954	ENTER;
		955	SAVETMPS;
		956	EXTEND (SP, 3);
		957	PUSHMARK (SP);
		958	PUSHs (&PL_sv_yes);
		959	PUSHs (fullname);
		960	PUSHs (CxHASARGS (cx) ? sv_2mortal (newRV_inc ((SV *)cx->blk_sub.argarray)) : &PL_sv_undef);
		961	PUTBACK;
		962	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_sub_cb", sizeof ("_trace_sub_cb") - 1, 0);
		963	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		964	SPAGAIN;
		965	FREETMPS;
		966	LEAVE;
		967	PL_runops = runops_trace;
		968	}
		969
		970	oldcxix = cxstack_ix;
		971	}
		972
		973	if (cctx->flags & CC_TRACE_LINE)
		974	{
		975	dSP;
		976
		977	PL_runops = RUNOPS_DEFAULT;
		978	ENTER;
		979	SAVETMPS;
		980	EXTEND (SP, 3);
		981	PL_runops = RUNOPS_DEFAULT;
		982	PUSHMARK (SP);
		983	PUSHs (sv_2mortal (newSVpv (OutCopFILE (oldcop), 0)));
		984	PUSHs (sv_2mortal (newSViv (CopLINE (oldcop))));
		985	PUTBACK;
		986	cb = hv_fetch ((HV *)SvRV (coro_current), "_trace_line_cb", sizeof ("_trace_line_cb") - 1, 0);
		987	if (cb) call_sv (*cb, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		988	SPAGAIN;
		989	FREETMPS;
		990	LEAVE;
		991	PL_runops = runops_trace;
		992	}
		993	}
		994	}
		995	}
		996	}
		997
		998	TAINT_NOT;
		999	return 0;
		1000	}
		1001
		1002	/* inject a fake call to Coro::State::_cctx_init into the execution */
		1003	/* _cctx_init should be careful, as it could be called at almost any time */
		1004	/* during execution of a perl program */
		1005	static void NOINLINE
		1006	cctx_prepare (pTHX_ coro_cctx *cctx)
		1007	{
543	dSP;	1008	dSP;
544	UNOP myop;	1009	LOGOP myop;
545	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
546		1010
547	coro_init_stacks (aTHX);	1011	PL_top_env = &PL_start_env;
548	/*PL_curcop = 0;*/
549	/*PL_in_eval = PL_in_eval;*/ /* inherit */
550	SvREFCNT_dec (GvAV (PL_defgv));
551	GvAV (PL_defgv) = coro->args; coro->args = 0;
552		1012
553	SPAGAIN;	1013	if (cctx->flags & CC_TRACE)
		1014	PL_runops = runops_trace;
554		1015
555	Zero (&myop, 1, UNOP);	1016	Zero (&myop, 1, LOGOP);
556	myop.op_next = Nullop;	1017	myop.op_next = PL_op;
557	myop.op_flags = OPf_WANT_VOID;	1018	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
558		1019
		1020	PUSHMARK (SP);
		1021	EXTEND (SP, 2);
		1022	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		1023	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		1024	PUTBACK;
559	PL_op = (OP *)&myop;	1025	PL_op = (OP *)&myop;
560
561	PUSHMARK(SP);
562	XPUSHs (sub_init);
563	PUTBACK;
564	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	1026	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
565	SPAGAIN;	1027	SPAGAIN;
566
567	ENTER; /* necessary e.g. for dounwind */
568	}	1028	}
569		1029
		1030	/*
		1031	* this is a _very_ stripped down perl interpreter ;)
		1032	*/
570	static void	1033	static void
571	transfer_tail ()	1034	cctx_run (void *arg)
572	{	1035	{
573	if (coro_mortal)	1036	dTHX;
574	{
575	SvREFCNT_dec (coro_mortal);
576	coro_mortal = 0;
577	}
578		1037
		1038	/* cctx_run is the alternative tail of transfer(), so unlock here. */
579	UNLOCK;	1039	UNLOCK;
		1040
		1041	/* we now skip the entersub that lead to transfer() */
		1042	PL_op = PL_op->op_next;
		1043
		1044	/* inject a fake subroutine call to cctx_init */
		1045	cctx_prepare (aTHX_ (coro_cctx *)arg);
		1046
		1047	/* somebody or something will hit me for both perl_run and PL_restartop */
		1048	PL_restartop = PL_op;
		1049	perl_run (PL_curinterp);
		1050
		1051	/*
		1052	* If perl-run returns we assume exit() was being called or the coro
		1053	* fell off the end, which seems to be the only valid (non-bug)
		1054	* reason for perl_run to return. We try to exit by jumping to the
		1055	* bootstrap-time "top" top_env, as we cannot restore the "main"
		1056	* coroutine as Coro has no such concept
		1057	*/
		1058	PL_top_env = main_top_env;
		1059	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
		1060	}
		1061
		1062	static coro_cctx *
		1063	cctx_new ()
		1064	{
		1065	coro_cctx *cctx;
		1066	void *stack_start;
		1067	size_t stack_size;
		1068
		1069	++cctx_count;
		1070
		1071	Newz (0, cctx, 1, coro_cctx);
		1072
		1073	#if HAVE_MMAP
		1074	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
		1075	/* mmap supposedly does allocate-on-write for us */
		1076	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		1077
		1078	if (cctx->sptr != (void *)-1)
		1079	{
		1080	# if CORO_STACKGUARD
		1081	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
		1082	# endif
		1083	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
		1084	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
		1085	cctx->flags |= CC_MAPPED;
		1086	}
		1087	else
		1088	#endif
		1089	{
		1090	cctx->ssize = coro_stacksize * (long)sizeof (long);
		1091	New (0, cctx->sptr, coro_stacksize, long);
		1092
		1093	if (!cctx->sptr)
		1094	{
		1095	perror ("FATAL: unable to allocate stack for coroutine");
		1096	_exit (EXIT_FAILURE);
		1097	}
		1098
		1099	stack_start = cctx->sptr;
		1100	stack_size = cctx->ssize;
		1101	}
		1102
		1103	REGISTER_STACK (cctx, (char *)stack_start, (char *)stack_start + stack_size);
		1104	coro_create (&cctx->cctx, cctx_run, (void *)cctx, stack_start, stack_size);
		1105
		1106	return cctx;
580	}	1107	}
581		1108
582	static void	1109	static void
583	coro_run (void *arg)	1110	cctx_destroy (coro_cctx *cctx)
584	{	1111	{
585	/*	1112	if (!cctx)
586	* this is a _very_ stripped down perl interpreter ;)	1113	return;
587	*/
588	dTHX;
589		1114
590	transfer_tail ();	1115	--cctx_count;
591		1116
592	PL_top_env = &PL_start_env;	1117	#if CORO_USE_VALGRIND
593	PL_restartop = PL_op;	1118	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
594	/* somebody will hit me for both perl_run and PL_restart_top */	1119	#endif
595	perl_run (aTHX_ PERL_GET_CONTEXT);
596
597	abort ();
598	}
599
600	static coro_stack *
601	stack_new ()
602	{
603	coro_stack *stack;
604
605	New (0, stack, 1, coro_stack);
606		1120
607	#if HAVE_MMAP	1121	#if HAVE_MMAP
		1122	if (cctx->flags & CC_MAPPED)
		1123	munmap (cctx->sptr, cctx->ssize);
		1124	else
		1125	#endif
		1126	Safefree (cctx->sptr);
608		1127
609	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */	1128	Safefree (cctx);
610	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1129	}
611		1130
612	if (stack->sptr == (void *)-1)	1131	/* wether this cctx should be destructed */
613	{	1132	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
614	fprintf (stderr, "FATAL: unable to mmap stack for coroutine\n");	1133
615	_exit (EXIT_FAILURE);	1134	static coro_cctx *
		1135	cctx_get (pTHX)
		1136	{
		1137	while (expect_true (cctx_first))
616	}	1138	{
		1139	coro_cctx *cctx = cctx_first;
		1140	cctx_first = cctx->next;
		1141	--cctx_idle;
617		1142
618	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1143	if (expect_true (!CCTX_EXPIRED (cctx)))
		1144	return cctx;
619		1145
620	#else	1146	cctx_destroy (cctx);
621
622	stack->ssize = STACKSIZE * (long)sizeof (long);
623	New (0, stack->sptr, STACKSIZE, long);
624
625	if (!stack->sptr)
626	{	1147	}
627	fprintf (stderr, "FATAL: unable to malloc stack for coroutine\n");
628	_exit (EXIT_FAILURE);
629	}
630		1148
631	#endif	1149	return cctx_new ();
632
633	coro_create (&stack->cctx, coro_run, 0, stack->sptr, stack->ssize);
634
635	return stack;
636	}	1150	}
637		1151
638	static void	1152	static void
639	stack_free (coro_stack *stack)	1153	cctx_put (coro_cctx *cctx)
640	{	1154	{
641	if (!stack || stack == main_stack)	1155	/* free another cctx if overlimit */
642	return;	1156	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
643
644	#if HAVE_MMAP
645	munmap (stack->sptr, stack->ssize);
646	#else
647	Safefree (stack->sptr);
648	#endif
649
650	Safefree (stack);
651	}
652
653	static coro_stack *stack_first;
654
655	static coro_stack *
656	stack_get ()
657	{
658	coro_stack *stack;
659
660	if (stack_first)
661	{
662	stack = stack_first;
663	stack_first = stack->next;
664	}
665	else
666	{	1157	{
667	stack = stack_new ();	1158	coro_cctx *first = cctx_first;
668	PL_op = PL_op->op_next;	1159	cctx_first = first->next;
		1160	--cctx_idle;
		1161
		1162	cctx_destroy (first);
669	}	1163	}
670		1164
671	return stack;	1165	++cctx_idle;
		1166	cctx->next = cctx_first;
		1167	cctx_first = cctx;
672	}	1168	}
		1169
		1170	/** coroutine switching *****************************************************/
673		1171
674	static void	1172	static void
675	stack_put (coro_stack *stack)	1173	transfer_check (pTHX_ struct coro *prev, struct coro *next)
676	{	1174	{
677	stack->next = stack_first;	1175	if (expect_true (prev != next))
678	stack_first = stack;	1176	{
679	}	1177	if (expect_false (!(prev->flags & (CF_RUNNING | CF_NEW))))
		1178	croak ("Coro::State::transfer called with non-running/new prev Coro::State, but can only transfer from running or new states");
680		1179
681	/* never call directly, always through the coro_state_transfer global variable */	1180	if (expect_false (next->flags & CF_RUNNING))
682	static void	1181	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		1182
		1183	if (expect_false (next->flags & CF_DESTROYED))
		1184	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		1185
		1186	#if !PERL_VERSION_ATLEAST (5,10,0)
		1187	if (expect_false (PL_lex_state != LEX_NOTPARSING))
		1188	croak ("Coro::State::transfer called while parsing, but this is not supported in your perl version");
		1189	#endif
		1190	}
		1191	}
		1192
		1193	/* always use the TRANSFER macro */
		1194	static void NOINLINE
683	transfer_impl (pTHX_ struct coro *prev, struct coro *next, int flags)	1195	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
684	{	1196	{
685	dSTACKLEVEL;	1197	dSTACKLEVEL;
		1198	static volatile int has_throw;
686		1199
687	/* sometimes transfer is only called to set idle_sp */	1200	/* sometimes transfer is only called to set idle_sp */
688	if (!prev->stack->idle_sp)	1201	if (expect_false (!next))
689	prev->stack->idle_sp = stacklevel;	1202	{
690		1203	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
691	LOCK;	1204	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
692
693	if (prev != next)
694	{	1205	}
695	coro_stack *prev_stack = prev->stack;	1206	else if (expect_true (prev != next))
		1207	{
		1208	coro_cctx *prev__cctx;
696		1209
697	/* possibly "free" the stack */	1210	if (expect_false (prev->flags & CF_NEW))
698	if (0 && prev_stack->idle_sp == stacklevel)
699	{	1211	{
700	stack_put (prev_stack);	1212	/* create a new empty context */
701	prev->stack = 0;	1213	Newz (0, prev->cctx, 1, coro_cctx);
		1214	prev->flags &= ~CF_NEW;
		1215	prev->flags |= CF_RUNNING;
702	}	1216	}
703		1217
704	if (next->mainstack)	1218	prev->flags &= ~CF_RUNNING;
		1219	next->flags |= CF_RUNNING;
		1220
		1221	LOCK;
		1222
		1223	/* first get rid of the old state */
		1224	save_perl (aTHX_ prev);
		1225
		1226	if (expect_false (next->flags & CF_NEW))
705	{	1227	{
706	/* coroutine already started */	1228	/* need to start coroutine */
707	SAVE (prev, flags);	1229	next->flags &= ~CF_NEW;
708	LOAD (next);	1230	/* setup coroutine call */
		1231	coro_setup (aTHX_ next);
709	}	1232	}
710	else	1233	else
		1234	load_perl (aTHX_ next);
		1235
		1236	prev__cctx = prev->cctx;
		1237
		1238	/* possibly "free" the cctx */
		1239	if (expect_true (
		1240	prev__cctx->idle_sp == STACKLEVEL
		1241	&& !(prev__cctx->flags & CC_TRACE)
		1242	&& !force_cctx
		1243	))
711	{	1244	{
712	/* need to start coroutine */	1245	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
713	/* first get rid of the old state */	1246	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
714	SAVE (prev, -1);	1247
715	/* setup coroutine call */	1248	prev->cctx = 0;
716	setup_coro (next);	1249
717	/* need to change stack from main_stack to real one */	1250	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
718	next->stack = 0;	1251	/* without this the next cctx_get might destroy the prev__cctx while still in use */
		1252	if (expect_false (CCTX_EXPIRED (prev__cctx)))
		1253	if (!next->cctx)
		1254	next->cctx = cctx_get (aTHX);
		1255
		1256	cctx_put (prev__cctx);
719	}	1257	}
720		1258
721	if (!next->stack)	1259	++next->usecount;
722	next->stack = stack_get ();
723		1260
724	if (prev_stack != next->stack)	1261	if (expect_true (!next->cctx))
		1262	next->cctx = cctx_get (aTHX);
		1263
		1264	has_throw = !!next->throw;
		1265
		1266	if (expect_false (prev__cctx != next->cctx))
		1267	{
		1268	prev__cctx->top_env = PL_top_env;
		1269	PL_top_env = next->cctx->top_env;
725	coro_transfer (&prev_stack->cctx, &next->stack->cctx);	1270	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
726	}	1271	}
727		1272
728	transfer_tail ();	1273	free_coro_mortal (aTHX);
729	}	1274	UNLOCK;
730		1275
731	/* use this function pointer to call the above function */	1276	if (expect_false (has_throw))
732	/* this is done to increase chances of the compiler not inlining the call */	1277	{
733	void (*coro_state_transfer)(pTHX_ struct coro *prev, struct coro *next, int flags) = transfer_impl;	1278	struct coro *coro = SvSTATE (coro_current);
734		1279
		1280	if (coro->throw)
		1281	{
		1282	SV *exception = coro->throw;
		1283	coro->throw = 0;
		1284	sv_setsv (ERRSV, exception);
		1285	croak (0);
		1286	}
		1287	}
		1288	}
		1289	}
		1290
		1291	struct transfer_args
		1292	{
		1293	struct coro *prev, *next;
		1294	};
		1295
		1296	#define TRANSFER(ta, force_cctx) transfer (aTHX_ (ta).prev, (ta).next, (force_cctx))
		1297	#define TRANSFER_CHECK(ta) transfer_check (aTHX_ (ta).prev, (ta).next)
		1298
		1299	/** high level stuff ********************************************************/
		1300
735	static void	1301	static int
736	coro_state_destroy (struct coro *coro)	1302	coro_state_destroy (pTHX_ struct coro *coro)
737	{	1303	{
738	if (coro->refcnt--)	1304	if (coro->flags & CF_DESTROYED)
739	return;	1305	return 0;
		1306
		1307	coro->flags |= CF_DESTROYED;
		1308
		1309	if (coro->flags & CF_READY)
		1310	{
		1311	/* reduce nready, as destroying a ready coro effectively unreadies it */
		1312	/* alternative: look through all ready queues and remove the coro */
		1313	LOCK;
		1314	--coro_nready;
		1315	UNLOCK;
		1316	}
		1317	else
		1318	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
740		1319
741	if (coro->mainstack && coro->mainstack != main_mainstack)	1320	if (coro->mainstack && coro->mainstack != main_mainstack)
742	{	1321	{
743	struct coro temp;	1322	struct coro temp;
744		1323
745	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1324	if (coro->flags & CF_RUNNING)
		1325	croak ("FATAL: tried to destroy currently running coroutine");
		1326
		1327	save_perl (aTHX_ &temp);
746	LOAD (aTHX_ coro);	1328	load_perl (aTHX_ coro);
747		1329
748	destroy_stacks (aTHX);	1330	coro_destroy (aTHX_ coro);
749		1331
750	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1332	load_perl (aTHX_ &temp);
751		1333
752	coro->mainstack = 0;	1334	coro->slot = 0;
753	}	1335	}
754		1336
755	stack_free (coro->stack);	1337	cctx_destroy (coro->cctx);
756	SvREFCNT_dec (coro->args);	1338	SvREFCNT_dec (coro->args);
757	Safefree (coro);	1339
		1340	if (coro->next) coro->next->prev = coro->prev;
		1341	if (coro->prev) coro->prev->next = coro->next;
		1342	if (coro == coro_first) coro_first = coro->next;
		1343
		1344	return 1;
758	}	1345	}
759		1346
760	static int	1347	static int
761	coro_state_clear (SV *sv, MAGIC *mg)	1348	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
762	{	1349	{
763	struct coro *coro = (struct coro *)mg->mg_ptr;	1350	struct coro *coro = (struct coro *)mg->mg_ptr;
764	mg->mg_ptr = 0;	1351	mg->mg_ptr = 0;
765		1352
		1353	coro->hv = 0;
		1354
		1355	if (--coro->refcnt < 0)
		1356	{
766	coro_state_destroy (coro);	1357	coro_state_destroy (aTHX_ coro);
		1358	Safefree (coro);
		1359	}
767		1360
768	return 0;	1361	return 0;
769	}	1362	}
770		1363
771	static int	1364	static int
772	coro_state_dup (MAGIC *mg, CLONE_PARAMS *params)	1365	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
773	{	1366	{
774	struct coro *coro = (struct coro *)mg->mg_ptr;	1367	struct coro *coro = (struct coro *)mg->mg_ptr;
775		1368
776	++coro->refcnt;	1369	++coro->refcnt;
777		1370
778	return 0;	1371	return 0;
779	}	1372	}
780		1373
781	static MGVTBL coro_state_vtbl = { 0, 0, 0, 0, coro_state_clear, 0, coro_state_dup, 0 };	1374	static MGVTBL coro_state_vtbl = {
782		1375	0, 0, 0, 0,
783	static struct coro *	1376	coro_state_free,
784	SvSTATE (SV *coro)	1377	0,
785	{	1378	#ifdef MGf_DUP
786	HV *stash;	1379	coro_state_dup,
787	MAGIC *mg;	1380	#else
788		1381	# define MGf_DUP 0
789	if (SvROK (coro))	1382	#endif
790	coro = SvRV (coro);	1383	};
791
792	stash = SvSTASH (coro);
793	if (stash != coro_stash && stash != coro_state_stash)
794	{
795	/* very slow, but rare, check */
796	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
797	croak ("Coro::State object required");
798	}
799
800	mg = SvMAGIC (coro);
801	assert (mg->mg_type == PERL_MAGIC_ext);
802	return (struct coro *)mg->mg_ptr;
803	}
804		1384
805	static void	1385	static void
		1386	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		1387	{
		1388	ta->prev = SvSTATE (prev_sv);
		1389	ta->next = SvSTATE (next_sv);
		1390	TRANSFER_CHECK (*ta);
		1391	}
		1392
		1393	static void
806	api_transfer (pTHX_ SV *prev, SV *next, int flags)	1394	api_transfer (SV *prev_sv, SV *next_sv)
807	{	1395	{
808	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1396	dTHX;
		1397	struct transfer_args ta;
		1398
		1399	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
		1400	TRANSFER (ta, 1);
809	}	1401	}
810		1402
811	/** Coro ********************************************************************/	1403	/** Coro ********************************************************************/
812		1404
813	#define PRIO_MAX 3
814	#define PRIO_HIGH 1
815	#define PRIO_NORMAL 0
816	#define PRIO_LOW -1
817	#define PRIO_IDLE -3
818	#define PRIO_MIN -4
819
820	/* for Coro.pm */
821	static GV *coro_current, *coro_idle;
822	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
823	static int coro_nready;
824
825	static void	1405	static void
826	coro_enq (pTHX_ SV *sv)	1406	coro_enq (pTHX_ SV *coro_sv)
		1407	{
		1408	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
		1409	}
		1410
		1411	static SV *
		1412	coro_deq (pTHX)
827	{	1413	{
828	int prio;	1414	int prio;
829		1415
830	if (SvTYPE (sv) != SVt_PVHV)
831	croak ("Coro::ready tried to enqueue something that is not a coroutine");
832
833	prio = SvSTATE (sv)->prio;
834
835	av_push (coro_ready [prio - PRIO_MIN], sv);
836	coro_nready++;
837	}
838
839	static SV *
840	coro_deq (pTHX_ int min_prio)
841	{
842	int prio = PRIO_MAX - PRIO_MIN;
843
844	min_prio -= PRIO_MIN;
845	if (min_prio < 0)
846	min_prio = 0;
847
848	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1416	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
849	if (AvFILLp (coro_ready [prio]) >= 0)	1417	if (AvFILLp (coro_ready [prio]) >= 0)
850	{
851	coro_nready--;
852	return av_shift (coro_ready [prio]);	1418	return av_shift (coro_ready [prio]);
853	}
854		1419
855	return 0;	1420	return 0;
856	}	1421	}
857		1422
		1423	static int
		1424	api_ready (SV *coro_sv)
		1425	{
		1426	dTHX;
		1427	struct coro *coro;
		1428	SV *sv_hook;
		1429	void (*xs_hook)(void);
		1430
		1431	if (SvROK (coro_sv))
		1432	coro_sv = SvRV (coro_sv);
		1433
		1434	coro = SvSTATE (coro_sv);
		1435
		1436	if (coro->flags & CF_READY)
		1437	return 0;
		1438
		1439	coro->flags |= CF_READY;
		1440
		1441	LOCK;
		1442
		1443	sv_hook = coro_nready ? 0 : coro_readyhook;
		1444	xs_hook = coro_nready ? 0 : coroapi.readyhook;
		1445
		1446	coro_enq (aTHX_ SvREFCNT_inc (coro_sv));
		1447	++coro_nready;
		1448
		1449	UNLOCK;
		1450
		1451	if (sv_hook)
		1452	{
		1453	dSP;
		1454
		1455	ENTER;
		1456	SAVETMPS;
		1457
		1458	PUSHMARK (SP);
		1459	PUTBACK;
		1460	call_sv (sv_hook, G_DISCARD);
		1461	SPAGAIN;
		1462
		1463	FREETMPS;
		1464	LEAVE;
		1465	}
		1466
		1467	if (xs_hook)
		1468	xs_hook ();
		1469
		1470	return 1;
		1471	}
		1472
		1473	static int
		1474	api_is_ready (SV *coro_sv)
		1475	{
		1476	dTHX;
		1477	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		1478	}
		1479
858	static void	1480	static void
859	api_ready (SV *coro)	1481	prepare_schedule (pTHX_ struct transfer_args *ta)
860	{	1482	{
861	dTHX;	1483	SV *prev_sv, *next_sv;
862		1484
863	if (SvROK (coro))	1485	for (;;)
864	coro = SvRV (coro);	1486	{
		1487	LOCK;
		1488	next_sv = coro_deq (aTHX);
		1489
		1490	/* nothing to schedule: call the idle handler */
		1491	if (expect_false (!next_sv))
		1492	{
		1493	dSP;
		1494	UNLOCK;
		1495
		1496	ENTER;
		1497	SAVETMPS;
		1498
		1499	PUSHMARK (SP);
		1500	PUTBACK;
		1501	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1502	SPAGAIN;
		1503
		1504	FREETMPS;
		1505	LEAVE;
		1506	continue;
		1507	}
		1508
		1509	ta->next = SvSTATE (next_sv);
		1510
		1511	/* cannot transfer to destroyed coros, skip and look for next */
		1512	if (expect_false (ta->next->flags & CF_DESTROYED))
		1513	{
		1514	UNLOCK;
		1515	SvREFCNT_dec (next_sv);
		1516	/* coro_nready is already taken care of by destroy */
		1517	continue;
		1518	}
		1519
		1520	--coro_nready;
		1521	UNLOCK;
		1522	break;
		1523	}
		1524
		1525	/* free this only after the transfer */
		1526	prev_sv = SvRV (coro_current);
		1527	ta->prev = SvSTATE (prev_sv);
		1528	TRANSFER_CHECK (*ta);
		1529	assert (ta->next->flags & CF_READY);
		1530	ta->next->flags &= ~CF_READY;
		1531	SvRV_set (coro_current, next_sv);
865		1532
866	LOCK;	1533	LOCK;
867	coro_enq (aTHX_ SvREFCNT_inc (coro));	1534	free_coro_mortal (aTHX);
		1535	coro_mortal = prev_sv;
868	UNLOCK;	1536	UNLOCK;
		1537	}
		1538
		1539	static void
		1540	prepare_cede (pTHX_ struct transfer_args *ta)
		1541	{
		1542	api_ready (coro_current);
		1543	prepare_schedule (aTHX_ ta);
		1544	}
		1545
		1546	static int
		1547	prepare_cede_notself (pTHX_ struct transfer_args *ta)
		1548	{
		1549	if (coro_nready)
		1550	{
		1551	SV *prev = SvRV (coro_current);
		1552	prepare_schedule (aTHX_ ta);
		1553	api_ready (prev);
		1554	return 1;
		1555	}
		1556	else
		1557	return 0;
869	}	1558	}
870		1559
871	static void	1560	static void
872	api_schedule (void)	1561	api_schedule (void)
873	{	1562	{
874	dTHX;	1563	dTHX;
		1564	struct transfer_args ta;
875		1565
876	SV *prev, *next;	1566	prepare_schedule (aTHX_ &ta);
877	SV *current = GvSV (coro_current);	1567	TRANSFER (ta, 1);
		1568	}
878		1569
879	for (;;)	1570	static int
880	{	1571	api_cede (void)
881	LOCK;	1572	{
		1573	dTHX;
		1574	struct transfer_args ta;
882		1575
883	next = coro_deq (aTHX_ PRIO_MIN);	1576	prepare_cede (aTHX_ &ta);
884		1577
885	if (next)	1578	if (expect_true (ta.prev != ta.next))
886	break;
887
888	UNLOCK;
889
890	{	1579	{
891	dSP;	1580	TRANSFER (ta, 1);
892		1581	return 1;
893	ENTER;
894	SAVETMPS;
895
896	PUSHMARK (SP);
897	PUTBACK;
898	call_sv (GvSV (coro_idle), G_DISCARD);
899
900	FREETMPS;
901	LEAVE;
902	}	1582	}
		1583	else
		1584	return 0;
		1585	}
		1586
		1587	static int
		1588	api_cede_notself (void)
		1589	{
		1590	dTHX;
		1591	struct transfer_args ta;
		1592
		1593	if (prepare_cede_notself (aTHX_ &ta))
903	}	1594	{
904		1595	TRANSFER (ta, 1);
905	prev = SvRV (current);	1596	return 1;
906	SvRV (current) = next;	1597	}
907		1598	else
908	/* free this only after the transfer */	1599	return 0;
909	coro_mortal = prev;
910
911	UNLOCK;
912
913	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), TRANSFER_SAVE_ALL);
914	}	1600	}
915
916	static int coro_cede_self;
917		1601
918	static void	1602	static void
919	api_cede (void)	1603	api_trace (SV *coro_sv, int flags)
920	{	1604	{
921	dTHX;	1605	dTHX;
922	SV *current = SvREFCNT_inc (SvRV (GvSV (coro_current)));	1606	struct coro *coro = SvSTATE (coro_sv);
923		1607
924	LOCK;	1608	if (flags & CC_TRACE)
925
926	if (coro_cede_self)
927	{
928	AV *runqueue = coro_ready [PRIO_MAX - PRIO_MIN];
929	av_unshift (runqueue, 1);
930	av_store (runqueue, 0, current);
931	coro_nready++;
932	coro_cede_self = 0;
933	}	1609	{
		1610	if (!coro->cctx)
		1611	coro->cctx = cctx_new ();
		1612	else if (!(coro->cctx->flags & CC_TRACE))
		1613	croak ("cannot enable tracing on coroutine with custom stack");
		1614
		1615	coro->cctx->flags |= CC_NOREUSE | (flags & (CC_TRACE | CC_TRACE_ALL));
		1616	}
		1617	else if (coro->cctx && coro->cctx->flags & CC_TRACE)
		1618	{
		1619	coro->cctx->flags &= ~(CC_TRACE | CC_TRACE_ALL);
		1620
		1621	if (coro->flags & CF_RUNNING)
		1622	PL_runops = RUNOPS_DEFAULT;
934	else	1623	else
935	coro_enq (aTHX_ current);	1624	coro->slot->runops = RUNOPS_DEFAULT;
936		1625	}
937	UNLOCK;
938
939	api_schedule ();
940	}	1626	}
941		1627
942	MODULE = Coro::State PACKAGE = Coro::State	1628	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
943		1629
944	PROTOTYPES: DISABLE	1630	PROTOTYPES: DISABLE
945		1631
946	BOOT:	1632	BOOT:
947	{	1633	{
948	#ifdef USE_ITHREADS	1634	#ifdef USE_ITHREADS
949	MUTEX_INIT (&coro_mutex);	1635	MUTEX_INIT (&coro_mutex);
950	#endif	1636	#endif
951	BOOT_PAGESIZE;	1637	BOOT_PAGESIZE;
952		1638
		1639	irsgv = gv_fetchpv ("/" , GV_ADD|GV_NOTQUAL, SVt_PV);
		1640	stdoutgv = gv_fetchpv ("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
		1641
		1642	orig_sigelem_get = PL_vtbl_sigelem.svt_get; PL_vtbl_sigelem.svt_get = coro_sigelem_get;
		1643	orig_sigelem_set = PL_vtbl_sigelem.svt_set; PL_vtbl_sigelem.svt_set = coro_sigelem_set;
		1644	orig_sigelem_clr = PL_vtbl_sigelem.svt_clear; PL_vtbl_sigelem.svt_clear = coro_sigelem_clr;
		1645
		1646	hv_sig = coro_get_hv (aTHX_ "SIG", TRUE);
		1647	rv_diehook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::diehook" , 0, SVt_PVCV));
		1648	rv_warnhook = newRV_inc ((SV *)gv_fetchpv ("Coro::State::warnhook", 0, SVt_PVCV));
		1649
953	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1650	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
954		1651
955	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1652	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
956	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1653	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
957	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1654	newCONSTSUB (coro_state_stash, "CC_TRACE_LINE", newSViv (CC_TRACE_LINE));
		1655	newCONSTSUB (coro_state_stash, "CC_TRACE_ALL" , newSViv (CC_TRACE_ALL));
958		1656
959	main_mainstack = PL_mainstack;	1657	main_mainstack = PL_mainstack;
		1658	main_top_env = PL_top_env;
960		1659
		1660	while (main_top_env->je_prev)
		1661	main_top_env = main_top_env->je_prev;
		1662
961	coroapi.ver = CORO_API_VERSION;	1663	coroapi.ver = CORO_API_VERSION;
		1664	coroapi.rev = CORO_API_REVISION;
962	coroapi.transfer = api_transfer;	1665	coroapi.transfer = api_transfer;
963
964	Newz (0, main_stack, 1, coro_stack);
965	main_stack->idle_sp = (void *)-1;
966		1666
967	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1667	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
968	}	1668	}
969		1669
970	SV *	1670	SV *
971	new (char *klass, ...)	1671	new (char *klass, ...)
972	CODE:	1672	CODE:
973	{	1673	{
974	struct coro *coro;	1674	struct coro *coro;
		1675	MAGIC *mg;
975	HV *hv;	1676	HV *hv;
976	int i;	1677	int i;
977		1678
978	Newz (0, coro, 1, struct coro);	1679	Newz (0, coro, 1, struct coro);
979	coro->args = newAV ();	1680	coro->args = newAV ();
		1681	coro->flags = CF_NEW;
980		1682
		1683	if (coro_first) coro_first->prev = coro;
		1684	coro->next = coro_first;
		1685	coro_first = coro;
		1686
981	hv = newHV ();	1687	coro->hv = hv = newHV ();
982	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;	1688	mg = sv_magicext ((SV *)hv, 0, CORO_MAGIC_type_state, &coro_state_vtbl, (char *)coro, 0);
		1689	mg->mg_flags |= MGf_DUP;
983	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1690	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
984		1691
985	av_push (coro->args, newSVsv (RETVAL));	1692	av_extend (coro->args, items - 1);
986	for (i = 1; i < items; i++)	1693	for (i = 1; i < items; i++)
987	av_push (coro->args, newSVsv (ST (i)));	1694	av_push (coro->args, newSVsv (ST (i)));
988
989	coro->stack = main_stack;
990	/*coro->mainstack = 0; *//*actual work is done inside transfer */
991	/*coro->stack = 0;*/
992	}	1695	}
993	OUTPUT:	1696	OUTPUT:
994	RETVAL	1697	RETVAL
995		1698
		1699	# these not obviously related functions are all rolled into the same xs
		1700	# function to increase chances that they all will call transfer with the same
		1701	# stack offset
996	void	1702	void
997	transfer (prev, next, flags)	1703	_set_stacklevel (...)
998	SV *prev	1704	ALIAS:
999	SV *next	1705	Coro::State::transfer = 1
1000	int flags	1706	Coro::schedule = 2
		1707	Coro::cede = 3
		1708	Coro::cede_notself = 4
1001	CODE:	1709	CODE:
		1710	{
		1711	struct transfer_args ta;
		1712
1002	PUTBACK;	1713	PUTBACK;
1003	coro_state_transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1714	switch (ix)
		1715	{
		1716	case 0:
		1717	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1718	ta.next = 0;
		1719	break;
		1720
		1721	case 1:
		1722	if (items != 2)
		1723	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1724
		1725	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
		1726	break;
		1727
		1728	case 2:
		1729	prepare_schedule (aTHX_ &ta);
		1730	break;
		1731
		1732	case 3:
		1733	prepare_cede (aTHX_ &ta);
		1734	break;
		1735
		1736	case 4:
		1737	if (!prepare_cede_notself (aTHX_ &ta))
		1738	XSRETURN_EMPTY;
		1739
		1740	break;
		1741	}
1004	SPAGAIN;	1742	SPAGAIN;
1005		1743
1006	int	1744	BARRIER;
1007	prio (Coro::State coro, int newprio = 0)	1745	PUTBACK;
1008	ALIAS:	1746	TRANSFER (ta, 0);
1009	nice = 1	1747	SPAGAIN; /* might be the sp of a different coroutine now */
1010	CODE:	1748	/* be extra careful not to ever do anything after TRANSFER */
1011	{
1012	RETVAL = coro->prio;
1013
1014	if (items > 1)
1015	{
1016	if (ix)
1017	newprio += coro->prio;
1018
1019	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1020	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1021
1022	coro->prio = newprio;
1023	}
1024	}	1749	}
		1750
		1751	bool
		1752	_destroy (SV *coro_sv)
		1753	CODE:
		1754	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1755	OUTPUT:
		1756	RETVAL
1025		1757
1026	void	1758	void
1027	_clear_idle_sp (Coro::State self)
1028	CODE:
1029	self->stack->idle_sp = 0;
1030
1031	void
1032	_clone_state_from (SV *dst, SV *src)
1033	CODE:
1034	{
1035	struct coro *coro_src = SvSTATE (src);
1036
1037	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1038
1039	++coro_src->refcnt;
1040	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1041	}
1042
1043	void
1044	_exit (code)	1759	_exit (int code)
1045	int code
1046	PROTOTYPE: $	1760	PROTOTYPE: $
1047	CODE:	1761	CODE:
1048	_exit (code);	1762	_exit (code);
1049		1763
1050	MODULE = Coro::State PACKAGE = Coro::Cont	1764	int
		1765	cctx_stacksize (int new_stacksize = 0)
		1766	CODE:
		1767	RETVAL = coro_stacksize;
		1768	if (new_stacksize)
		1769	coro_stacksize = new_stacksize;
		1770	OUTPUT:
		1771	RETVAL
		1772
		1773	int
		1774	cctx_count ()
		1775	CODE:
		1776	RETVAL = cctx_count;
		1777	OUTPUT:
		1778	RETVAL
		1779
		1780	int
		1781	cctx_idle ()
		1782	CODE:
		1783	RETVAL = cctx_idle;
		1784	OUTPUT:
		1785	RETVAL
1051		1786
1052	void	1787	void
1053	yield (...)	1788	list ()
1054	PROTOTYPE: @	1789	PPCODE:
		1790	{
		1791	struct coro *coro;
		1792	for (coro = coro_first; coro; coro = coro->next)
		1793	if (coro->hv)
		1794	XPUSHs (sv_2mortal (newRV_inc ((SV *)coro->hv)));
		1795	}
		1796
		1797	void
		1798	call (Coro::State coro, SV *coderef)
		1799	ALIAS:
		1800	eval = 1
		1801	CODE:
		1802	{
		1803	if (coro->mainstack)
		1804	{
		1805	struct coro temp;
		1806
		1807	if (!(coro->flags & CF_RUNNING))
		1808	{
		1809	PUTBACK;
		1810	save_perl (aTHX_ &temp);
		1811	load_perl (aTHX_ coro);
		1812	}
		1813
		1814	{
		1815	dSP;
		1816	ENTER;
		1817	SAVETMPS;
		1818	PUTBACK;
		1819	PUSHSTACK;
		1820	PUSHMARK (SP);
		1821
		1822	if (ix)
		1823	eval_sv (coderef, 0);
		1824	else
		1825	call_sv (coderef, G_KEEPERR | G_EVAL | G_VOID | G_DISCARD);
		1826
		1827	POPSTACK;
		1828	SPAGAIN;
		1829	FREETMPS;
		1830	LEAVE;
		1831	PUTBACK;
		1832	}
		1833
		1834	if (!(coro->flags & CF_RUNNING))
		1835	{
		1836	save_perl (aTHX_ coro);
		1837	load_perl (aTHX_ &temp);
		1838	SPAGAIN;
		1839	}
		1840	}
		1841	}
		1842
		1843	SV *
		1844	is_ready (Coro::State coro)
		1845	PROTOTYPE: $
		1846	ALIAS:
		1847	is_ready = CF_READY
		1848	is_running = CF_RUNNING
		1849	is_new = CF_NEW
		1850	is_destroyed = CF_DESTROYED
		1851	CODE:
		1852	RETVAL = boolSV (coro->flags & ix);
		1853	OUTPUT:
		1854	RETVAL
		1855
		1856	void
		1857	api_trace (SV *coro, int flags = CC_TRACE | CC_TRACE_SUB)
		1858
		1859	SV *
		1860	has_cctx (Coro::State coro)
		1861	PROTOTYPE: $
		1862	CODE:
		1863	RETVAL = boolSV (!!coro->cctx);
		1864	OUTPUT:
		1865	RETVAL
		1866
		1867	int
		1868	is_traced (Coro::State coro)
		1869	PROTOTYPE: $
		1870	CODE:
		1871	RETVAL = (coro->cctx ? coro->cctx->flags : 0) & CC_TRACE_ALL;
		1872	OUTPUT:
		1873	RETVAL
		1874
		1875	IV
		1876	rss (Coro::State coro)
		1877	PROTOTYPE: $
		1878	ALIAS:
		1879	usecount = 1
1055	CODE:	1880	CODE:
1056	{	1881	switch (ix)
1057	SV *yieldstack;	1882	{
1058	SV *sv;	1883	case 0: RETVAL = coro_rss (aTHX_ coro); break;
1059	AV *defav = GvAV (PL_defgv);	1884	case 1: RETVAL = coro->usecount; break;
1060	struct coro *prev, *next;
1061
1062	yieldstack = *hv_fetch (
1063	(HV *)SvRV (GvSV (coro_current)),
1064	"yieldstack", sizeof ("yieldstack") - 1,
1065	0	1885	}
1066	);	1886	OUTPUT:
		1887	RETVAL
1067		1888
1068	/* set up @_ -- ugly */	1889	void
1069	av_clear (defav);	1890	force_cctx ()
1070	av_fill (defav, items - 1);	1891	CODE:
1071	while (items--)	1892	struct coro *coro = SvSTATE (coro_current);
1072	av_store (defav, items, SvREFCNT_inc (ST(items)));	1893	coro->cctx->idle_sp = 0;
1073		1894
1074	sv = av_pop ((AV *)SvRV (yieldstack));	1895	void
1075	prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));	1896	throw (Coro::State self, SV *throw = &PL_sv_undef)
1076	next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));	1897	PROTOTYPE: $;$
		1898	CODE:
1077	SvREFCNT_dec (sv);	1899	SvREFCNT_dec (self->throw);
		1900	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
1078		1901
1079	coro_state_transfer (aTHX_ prev, next, 0);	1902	void
1080	}	1903	swap_defsv (Coro::State self)
		1904	PROTOTYPE: $
		1905	ALIAS:
		1906	swap_defav = 1
		1907	CODE:
		1908	if (!self->slot)
		1909	croak ("cannot swap state with coroutine that has no saved state");
		1910	else
		1911	{
		1912	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		1913	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		1914
		1915	SV *tmp = *src; *src = *dst; *dst = tmp;
		1916	}
1081		1917
1082	MODULE = Coro::State PACKAGE = Coro	1918	MODULE = Coro::State PACKAGE = Coro
1083		1919
1084	BOOT:	1920	BOOT:
1085	{	1921	{
1086	int i;	1922	int i;
1087		1923
		1924	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1925	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1926	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1927
		1928	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1929	SvREADONLY_on (coro_current);
		1930
1088	coro_stash = gv_stashpv ("Coro", TRUE);	1931	coro_stash = gv_stashpv ("Coro", TRUE);
1089		1932
1090	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1933	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1091	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1934	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1092	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1935	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1093	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1936	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1094	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1937	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1095	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1938	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1096		1939
1097	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1098	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1099
1100	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1940	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1101	coro_ready[i] = newAV ();	1941	coro_ready[i] = newAV ();
1102		1942
1103	{	1943	{
1104	SV *sv = perl_get_sv("Coro::API", 1);	1944	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1945	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1105		1946
1106	coroapi.schedule = api_schedule;	1947	coroapi.schedule = api_schedule;
1107	coroapi.cede = api_cede;	1948	coroapi.cede = api_cede;
		1949	coroapi.cede_notself = api_cede_notself;
1108	coroapi.ready = api_ready;	1950	coroapi.ready = api_ready;
		1951	coroapi.is_ready = api_is_ready;
1109	coroapi.nready = &coro_nready;	1952	coroapi.nready = &coro_nready;
1110	coroapi.current = coro_current;	1953	coroapi.current = coro_current;
1111		1954
1112	GCoroAPI = &coroapi;	1955	GCoroAPI = &coroapi;
1113	sv_setiv (sv, (IV)&coroapi);	1956	sv_setiv (sv, (IV)&coroapi);
1114	SvREADONLY_on (sv);	1957	SvREADONLY_on (sv);
1115	}	1958	}
1116	}	1959	}
1117		1960
1118	void	1961	void
		1962	_set_current (SV *current)
		1963	PROTOTYPE: $
		1964	CODE:
		1965	SvREFCNT_dec (SvRV (coro_current));
		1966	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1967
		1968	void
		1969	_set_readyhook (SV *hook)
		1970	PROTOTYPE: $
		1971	CODE:
		1972	LOCK;
		1973	SvREFCNT_dec (coro_readyhook);
		1974	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
		1975	UNLOCK;
		1976
		1977	int
		1978	prio (Coro::State coro, int newprio = 0)
		1979	ALIAS:
		1980	nice = 1
		1981	CODE:
		1982	{
		1983	RETVAL = coro->prio;
		1984
		1985	if (items > 1)
		1986	{
		1987	if (ix)
		1988	newprio = coro->prio - newprio;
		1989
		1990	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1991	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1992
		1993	coro->prio = newprio;
		1994	}
		1995	}
		1996	OUTPUT:
		1997	RETVAL
		1998
		1999	SV *
1119	ready (SV *self)	2000	ready (SV *self)
1120	PROTOTYPE: $	2001	PROTOTYPE: $
1121	CODE:	2002	CODE:
1122	api_ready (self);	2003	RETVAL = boolSV (api_ready (self));
		2004	OUTPUT:
		2005	RETVAL
1123		2006
1124	int	2007	int
1125	nready (...)	2008	nready (...)
1126	PROTOTYPE:	2009	PROTOTYPE:
1127	CODE:	2010	CODE:
1128	RETVAL = coro_nready;	2011	RETVAL = coro_nready;
1129	OUTPUT:	2012	OUTPUT:
1130	RETVAL	2013	RETVAL
1131		2014
		2015	# for async_pool speedup
1132	void	2016	void
1133	schedule (...)	2017	_pool_1 (SV *cb)
1134	PROTOTYPE:
1135	CODE:	2018	CODE:
1136	api_schedule ();	2019	{
		2020	struct coro *coro = SvSTATE (coro_current);
		2021	HV *hv = (HV *)SvRV (coro_current);
		2022	AV *defav = GvAV (PL_defgv);
		2023	SV *invoke = hv_delete (hv, "_invoke", sizeof ("_invoke") - 1, 0);
		2024	AV *invoke_av;
		2025	int i, len;
		2026
		2027	if (!invoke)
		2028	{
		2029	SV *old = PL_diehook;
		2030	PL_diehook = 0;
		2031	SvREFCNT_dec (old);
		2032	croak ("\3async_pool terminate\2\n");
		2033	}
		2034
		2035	SvREFCNT_dec (coro->saved_deffh);
		2036	coro->saved_deffh = SvREFCNT_inc ((SV *)PL_defoutgv);
		2037
		2038	hv_store (hv, "desc", sizeof ("desc") - 1,
		2039	newSVpvn ("[async_pool]", sizeof ("[async_pool]") - 1), 0);
		2040
		2041	invoke_av = (AV *)SvRV (invoke);
		2042	len = av_len (invoke_av);
		2043
		2044	sv_setsv (cb, AvARRAY (invoke_av)[0]);
		2045
		2046	if (len > 0)
		2047	{
		2048	av_fill (defav, len - 1);
		2049	for (i = 0; i < len; ++i)
		2050	av_store (defav, i, SvREFCNT_inc (AvARRAY (invoke_av)[i + 1]));
		2051	}
		2052
		2053	SvREFCNT_dec (invoke);
		2054	}
1137		2055
1138	void	2056	void
1139	_set_cede_self ()	2057	_pool_2 (SV *cb)
1140	CODE:	2058	CODE:
1141	coro_cede_self = 1;	2059	{
		2060	struct coro *coro = SvSTATE (coro_current);
1142		2061
1143	void	2062	sv_setsv (cb, &PL_sv_undef);
1144	cede (...)	2063
1145	PROTOTYPE:	2064	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
1146	CODE:	2065	coro->saved_deffh = 0;
1147	api_cede ();	2066
		2067	if (coro_rss (aTHX_ coro) > SvIV (sv_pool_rss)
		2068	|| av_len (av_async_pool) + 1 >= SvIV (sv_pool_size))
		2069	{
		2070	SV *old = PL_diehook;
		2071	PL_diehook = 0;
		2072	SvREFCNT_dec (old);
		2073	croak ("\3async_pool terminate\2\n");
		2074	}
		2075
		2076	av_clear (GvAV (PL_defgv));
		2077	hv_store ((HV *)SvRV (coro_current), "desc", sizeof ("desc") - 1,
		2078	newSVpvn ("[async_pool idle]", sizeof ("[async_pool idle]") - 1), 0);
		2079
		2080	coro->prio = 0;
		2081
		2082	if (coro->cctx && (coro->cctx->flags & CC_TRACE))
		2083	api_trace (coro_current, 0);
		2084
		2085	av_push (av_async_pool, newSVsv (coro_current));
		2086	}
		2087
1148		2088
1149	MODULE = Coro::State PACKAGE = Coro::AIO	2089	MODULE = Coro::State PACKAGE = Coro::AIO
1150		2090
1151	SV *	2091	SV *
1152	_get_state ()	2092	_get_state ()
1153	CODE:	2093	CODE:
1154	{	2094	{
1155	struct {	2095	struct io_state *data;
1156	int errorno;
1157	int laststype;
1158	int laststatval;
1159	Stat_t statcache;
1160	} data;
1161		2096
		2097	RETVAL = newSV (sizeof (struct io_state));
		2098	data = (struct io_state *)SvPVX (RETVAL);
		2099	SvCUR_set (RETVAL, sizeof (struct io_state));
		2100	SvPOK_only (RETVAL);
		2101
1162	data.errorno = errno;	2102	data->errorno = errno;
1163	data.laststype = PL_laststype;	2103	data->laststype = PL_laststype;
1164	data.laststatval = PL_laststatval;	2104	data->laststatval = PL_laststatval;
1165	data.statcache = PL_statcache;	2105	data->statcache = PL_statcache;
1166
1167	RETVAL = newSVpvn ((char *)&data, sizeof data);
1168	}	2106	}
1169	OUTPUT:	2107	OUTPUT:
1170	RETVAL	2108	RETVAL
1171		2109
1172	void	2110	void
1173	_set_state (char *data_)	2111	_set_state (char *data_)
1174	PROTOTYPE: $	2112	PROTOTYPE: $
1175	CODE:	2113	CODE:
1176	{	2114	{
1177	struct {	2115	struct io_state *data = (void *)data_;
1178	int errorno;
1179	int laststype;
1180	int laststatval;
1181	Stat_t statcache;
1182	} *data = (void *)data_;
1183		2116
1184	errno = data->errorno;	2117	errno = data->errorno;
1185	PL_laststype = data->laststype;	2118	PL_laststype = data->laststype;
1186	PL_laststatval = data->laststatval;	2119	PL_laststatval = data->laststatval;
1187	PL_statcache = data->statcache;	2120	PL_statcache = data->statcache;
1188	}	2121	}
		2122
		2123
		2124	MODULE = Coro::State PACKAGE = Coro::AnyEvent
		2125
		2126	BOOT:
		2127	sv_activity = coro_get_sv (aTHX_ "Coro::AnyEvent::ACTIVITY", TRUE);
		2128
		2129	SV *
		2130	_schedule (...)
		2131	PROTOTYPE: @
		2132	CODE:
		2133	{
		2134	static int incede;
		2135
		2136	api_cede_notself ();
		2137
		2138	++incede;
		2139	while (coro_nready >= incede && api_cede ())
		2140	;
		2141
		2142	sv_setsv (sv_activity, &PL_sv_undef);
		2143	if (coro_nready >= incede)
		2144	{
		2145	PUSHMARK (SP);
		2146	PUTBACK;
		2147	call_pv ("Coro::AnyEvent::_activity", G_DISCARD | G_EVAL);
		2148	SPAGAIN;
		2149	}
		2150
		2151	--incede;
		2152	}
		2153

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