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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.103 by root, Mon Nov 27 01:33:30 2006 UTC vs.
Revision 1.241 by root, Mon Jul 21 02:39:15 2008 UTC

1	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
		2
		3	#define PERL_NO_GET_CONTEXT
		4	#define PERL_EXT
2		5
3	#include "EXTERN.h"	6	#include "EXTERN.h"
4	#include "perl.h"	7	#include "perl.h"
5	#include "XSUB.h"	8	#include "XSUB.h"
6		9
7	#include "patchlevel.h"	10	#include "patchlevel.h"
		11
		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
8		57
9	#define PERL_VERSION_ATLEAST(a,b,c) \	58	#define PERL_VERSION_ATLEAST(a,b,c) \
10	(PERL_REVISION > (a) \	59	(PERL_REVISION > (a) \
11	|| (PERL_REVISION == (a) \	60	|| (PERL_REVISION == (a) \
12	&& (PERL_VERSION > (b) \	61	&& (PERL_VERSION > (b) \
…		…
31	# ifndef IS_PADCONST	80	# ifndef IS_PADCONST
32	# define IS_PADCONST(v) 0	81	# define IS_PADCONST(v) 0
33	# endif	82	# endif
34	#endif	83	#endif
35		84
36	#include <stdio.h>	85	/* 5.8.8 */
37	#include <errno.h>	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
38		102
39	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	103	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
40	# undef STACKGUARD	104	# undef CORO_STACKGUARD
41	#endif
42
43	#ifndef STACKGUARD
44	# define STACKGUARD 0
45	#endif
46
47	#ifdef HAVE_MMAP
48	# include <unistd.h>
49	# include <sys/mman.h>
50	# ifndef MAP_ANONYMOUS
51	# ifdef MAP_ANON
52	# define MAP_ANONYMOUS MAP_ANON
53	# else
54	# undef HAVE_MMAP
55	# endif
56	# endif	105	#endif
57	# include <limits.h>	106
58	# ifndef PAGESIZE	107	#ifndef CORO_STACKGUARD
59	# define PAGESIZE pagesize	108	# define CORO_STACKGUARD 0
60	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
61	static long pagesize;
62	# else
63	# define BOOT_PAGESIZE
64	# endif	109	#endif
65	#endif
66		110
67	/* The next macro should declare a variable stacklevel that contains and approximation	111	/* prefer perl internal functions over our own? */
68	* to the current C stack pointer. Its property is that it changes with each call	112	#ifndef CORO_PREFER_PERL_FUNCTIONS
69	* and should be unique. */	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. */
70	#define dSTACKLEVEL int stacklevel	118	#define dSTACKLEVEL volatile char stacklevel
71	#define STACKLEVEL ((void *)&stacklevel)	119	#define STACKLEVEL ((void *)&stacklevel)
72		120
73	#define IN_DESTRUCT (PL_main_cv == Nullcv)	121	#define IN_DESTRUCT (PL_main_cv == Nullcv)
74		122
75	#if __GNUC__ >= 3	123	#if __GNUC__ >= 3
76	# define attribute(x) __attribute__(x)	124	# define attribute(x) __attribute__(x)
		125	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		126	# define expect(expr,value) __builtin_expect ((expr),(value))
77	#else	127	#else
78	# define attribute(x)	128	# define attribute(x)
		129	# define BARRIER
		130	# define expect(expr,value) (expr)
79	#endif	131	#endif
		132
		133	#define expect_false(expr) expect ((expr) != 0, 0)
		134	#define expect_true(expr) expect ((expr) != 0, 1)
80		135
81	#define NOINLINE attribute ((noinline))	136	#define NOINLINE attribute ((noinline))
82		137
83	#include "CoroAPI.h"	138	#include "CoroAPI.h"
84
85	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
86		139
87	#ifdef USE_ITHREADS	140	#ifdef USE_ITHREADS
88	static perl_mutex coro_mutex;	141	static perl_mutex coro_mutex;
89	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	142	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
90	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	143	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
91	#else	144	#else
92	# define LOCK (void)0	145	# define LOCK (void)0
93	# define UNLOCK (void)0	146	# define UNLOCK (void)0
94	#endif	147	#endif
95		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;
96	static struct CoroAPI coroapi;	159	static struct CoroAPI coroapi;
97	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;
98	static HV *coro_state_stash, *coro_stash;	162	static HV *coro_state_stash, *coro_stash;
99	static SV *coro_mortal; /* will be freed after next transfer */	163	static volatile SV *coro_mortal; /* will be freed after next transfer */
		164
		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	};
100		190
101	/* this is a structure representing a c-level coroutine */	191	/* this is a structure representing a c-level coroutine */
102	typedef struct coro_stack {	192	typedef struct coro_cctx {
103	struct coro_stack *next;	193	struct coro_cctx *next;
104		194
105	/* the stack */	195	/* the stack */
106	void *sptr;	196	void *sptr;
107	long ssize; /* positive == mmap, otherwise malloc */	197	size_t ssize;
108		198
109	/* cpu state */	199	/* cpu state */
110	void *idle_sp; /* sp of top-level transfer/schedule/cede call */	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 */
111	JMPENV *top_env;	202	JMPENV *top_env;
112	coro_context cctx;	203	coro_context cctx;
113	} coro_stack;	204
		205	#if CORO_USE_VALGRIND
		206	int valgrind_id;
		207	#endif
		208	unsigned char flags;
		209	} coro_cctx;
		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))
114		230
115	/* this is a structure representing a perl-level coroutine */	231	/* this is a structure representing a perl-level coroutine */
116	struct coro {	232	struct coro {
117	/* the c coroutine allocated to this perl coroutine, if any */	233	/* the c coroutine allocated to this perl coroutine, if any */
118	coro_stack *stack;	234	coro_cctx *cctx;
119		235
120	/* data associated with this coroutine (initial args) */	236	/* process data */
121	AV *args;
122	int refcnt;
123
124	/* optionally saved, might be zero */
125	AV *defav;
126	SV *defsv;
127	SV *errsv;
128
129	/* saved global state not related to stacks */
130	U8 dowarn;
131	I32 in_eval;
132
133	/* the stacks and related info (callchain etc..) */
134	PERL_SI *curstackinfo;
135	AV *curstack;
136	AV *mainstack;	237	AV *mainstack;
137	SV **stack_sp;	238	perl_slots *slot; /* basically the saved sp */
138	OP *op;	239
139	SV **curpad;	240	AV *args; /* data associated with this coroutine (initial args) */
140	AV *comppad;	241	int refcnt; /* coroutines are refcounted, yes */
141	CV *compcv;	242	int flags; /* CF_ flags */
142	SV **stack_base;	243	HV *hv; /* the perl hash associated with this coro, if any */
143	SV **stack_max;	244
144	SV **tmps_stack;	245	/* statistics */
145	I32 tmps_floor;	246	int usecount; /* number of transfers to this coro */
146	I32 tmps_ix;
147	I32 tmps_max;
148	I32 *markstack;
149	I32 *markstack_ptr;
150	I32 *markstack_max;
151	I32 *scopestack;
152	I32 scopestack_ix;
153	I32 scopestack_max;
154	ANY *savestack;
155	I32 savestack_ix;
156	I32 savestack_max;
157	OP **retstack;
158	I32 retstack_ix;
159	I32 retstack_max;
160	PMOP *curpm;
161	COP *curcop;
162		247
163	/* coro process data */	248	/* coro process data */
164	int prio;	249	int prio;
		250	SV *throw; /* exception to be thrown */
		251
		252	/* async_pool */
		253	SV *saved_deffh;
		254
		255	/* linked list */
		256	struct coro *next, *prev;
165	};	257	};
166		258
167	typedef struct coro *Coro__State;	259	typedef struct coro *Coro__State;
168	typedef struct coro *Coro__State_or_hashref;	260	typedef struct coro *Coro__State_or_hashref;
169		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
170	static AV *	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
		310	static AV *
171	coro_clone_padlist (CV *cv)	311	coro_clone_padlist (pTHX_ CV *cv)
172	{	312	{
173	AV *padlist = CvPADLIST (cv);	313	AV *padlist = CvPADLIST (cv);
174	AV *newpadlist, *newpad;	314	AV *newpadlist, *newpad;
175		315
176	newpadlist = newAV ();	316	newpadlist = newAV ();
177	AvREAL_off (newpadlist);	317	AvREAL_off (newpadlist);
178	#if PERL_VERSION_ATLEAST (5,9,0)	318	#if PERL_VERSION_ATLEAST (5,10,0)
179	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);	319	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
180	#else	320	#else
181	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	321	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
182	#endif	322	#endif
183	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	323	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
…		…
188		328
189	return newpadlist;	329	return newpadlist;
190	}	330	}
191		331
192	static void	332	static void
193	free_padlist (AV *padlist)	333	free_padlist (pTHX_ AV *padlist)
194	{	334	{
195	/* may be during global destruction */	335	/* may be during global destruction */
196	if (SvREFCNT (padlist))	336	if (SvREFCNT (padlist))
197	{	337	{
198	I32 i = AvFILLp (padlist);	338	I32 i = AvFILLp (padlist);
…		…
219	AV *padlist;	359	AV *padlist;
220	AV *av = (AV *)mg->mg_obj;	360	AV *av = (AV *)mg->mg_obj;
221		361
222	/* casting is fun. */	362	/* casting is fun. */
223	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	363	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
224	free_padlist (padlist);	364	free_padlist (aTHX_ padlist);
225
226	SvREFCNT_dec (av);
227		365
228	return 0;	366	return 0;
229	}	367	}
230		368
231	#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
232		371
233	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))
234		412
235	/* the next two functions merely cache the padlists */	413	/* the next two functions merely cache the padlists */
236	static void	414	static void
237	get_padlist (CV *cv)	415	get_padlist (pTHX_ CV *cv)
238	{	416	{
239	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	417	MAGIC *mg = CORO_MAGIC_cv (cv);
		418	AV *av;
240		419
241	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	420	if (expect_true (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0))
242	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	421	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
243	else	422	else
244	{	423	{
245	#if 0	424	#if CORO_PREFER_PERL_FUNCTIONS
246	/* this is probably cleaner, but also slower? */	425	/* this is probably cleaner, but also slower? */
247	CV *cp = Perl_cv_clone (cv);	426	CV *cp = Perl_cv_clone (cv);
248	CvPADLIST (cv) = CvPADLIST (cp);	427	CvPADLIST (cv) = CvPADLIST (cp);
249	CvPADLIST (cp) = 0;	428	CvPADLIST (cp) = 0;
250	SvREFCNT_dec (cp);	429	SvREFCNT_dec (cp);
251	#else	430	#else
252	CvPADLIST (cv) = coro_clone_padlist (cv);	431	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);
253	#endif	432	#endif
254	}	433	}
255	}	434	}
256		435
257	static void	436	static void
258	put_padlist (CV *cv)	437	put_padlist (pTHX_ CV *cv)
259	{	438	{
260	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	439	MAGIC *mg = CORO_MAGIC_cv (cv);
		440	AV *av;
261		441
262	if (!mg)	442	if (expect_false (!mg))
263	{	443	mg = sv_magicext ((SV *)cv, (SV *)newAV (), CORO_MAGIC_type_cv, &coro_cv_vtbl, 0, 0);
264	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
265	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
266	mg->mg_virtual = &vtbl_coro;
267	mg->mg_obj = (SV *)newAV ();
268	}
269		444
270	av_push ((AV *)mg->mg_obj, (SV *)CvPADLIST (cv));	445	av = (AV *)mg->mg_obj;
271	}
272		446
273	#define SB do {	447	if (expect_false (AvFILLp (av) >= AvMAX (av)))
274	#define SE } while (0)	448	av_extend (av, AvMAX (av) + 1);
275		449
276	#define LOAD(state) load_state((state));	450	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
277	#define SAVE(state,flags) save_state((state),(flags));	451	}
278		452
279	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	453	/** load & save, init *******************************************************/
280		454
281	static void	455	static void
282	load_state(Coro__State c)	456	load_perl (pTHX_ Coro__State c)
283	{	457	{
284	PL_dowarn = c->dowarn;	458	perl_slots *slot = c->slot;
285	PL_in_eval = c->in_eval;	459	c->slot = 0;
286		460
287	PL_curstackinfo = c->curstackinfo;
288	PL_curstack = c->curstack;
289	PL_mainstack = c->mainstack;	461	PL_mainstack = c->mainstack;
290	PL_stack_sp = c->stack_sp;
291	PL_op = c->op;
292	PL_curpad = c->curpad;
293	PL_comppad = c->comppad;
294	PL_compcv = c->compcv;
295	PL_stack_base = c->stack_base;
296	PL_stack_max = c->stack_max;
297	PL_tmps_stack = c->tmps_stack;
298	PL_tmps_floor = c->tmps_floor;
299	PL_tmps_ix = c->tmps_ix;
300	PL_tmps_max = c->tmps_max;
301	PL_markstack = c->markstack;
302	PL_markstack_ptr = c->markstack_ptr;
303	PL_markstack_max = c->markstack_max;
304	PL_scopestack = c->scopestack;
305	PL_scopestack_ix = c->scopestack_ix;
306	PL_scopestack_max = c->scopestack_max;
307	PL_savestack = c->savestack;
308	PL_savestack_ix = c->savestack_ix;
309	PL_savestack_max = c->savestack_max;
310	#if !PERL_VERSION_ATLEAST (5,9,0)
311	PL_retstack = c->retstack;
312	PL_retstack_ix = c->retstack_ix;
313	PL_retstack_max = c->retstack_max;
314	#endif
315	PL_curpm = c->curpm;
316	PL_curcop = c->curcop;
317		462
318	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	463	GvSV (PL_defgv) = slot->defsv;
319	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	464	GvAV (PL_defgv) = slot->defav;
320	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
321		471
322	{	472	{
323	dSP;	473	dSP;
		474
324	CV *cv;	475	CV *cv;
325		476
326	/* now do the ugly restore mess */	477	/* now do the ugly restore mess */
327	while ((cv = (CV *)POPs))	478	while (expect_true (cv = (CV *)POPs))
328	{	479	{
329	AV *padlist = (AV *)POPs;
330
331	if (padlist)
332	{
333	put_padlist (cv); /* mark this padlist as available */	480	put_padlist (aTHX_ cv); /* mark this padlist as available */
334	CvPADLIST(cv) = padlist;	481	CvDEPTH (cv) = PTR2IV (POPs);
335	}	482	CvPADLIST (cv) = (AV *)POPs;
336
337	++CvDEPTH(cv);
338	}	483	}
339		484
340	PUTBACK;	485	PUTBACK;
341	}	486	}
342	}	487	}
343		488
344	static void	489	static void
345	save_state(Coro__State c, int flags)	490	save_perl (pTHX_ Coro__State c)
346	{	491	{
347	{	492	{
348	dSP;	493	dSP;
349	I32 cxix = cxstack_ix;	494	I32 cxix = cxstack_ix;
350	PERL_CONTEXT *ccstk = cxstack;	495	PERL_CONTEXT *ccstk = cxstack;
…		…
353	/*	498	/*
354	* 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
355	* (and reinitialize) all cv's in the whole callchain :(	500	* (and reinitialize) all cv's in the whole callchain :(
356	*/	501	*/
357		502
358	PUSHs (Nullsv);	503	XPUSHs (Nullsv);
359	/* this loop was inspired by pp_caller */	504	/* this loop was inspired by pp_caller */
360	for (;;)	505	for (;;)
361	{	506	{
362	while (cxix >= 0)	507	while (expect_true (cxix >= 0))
363	{	508	{
364	PERL_CONTEXT *cx = &ccstk[cxix--];	509	PERL_CONTEXT *cx = &ccstk[cxix--];
365		510
366	if (CxTYPE(cx) == CXt_SUB)	511	if (expect_true (CxTYPE (cx) == CXt_SUB || CxTYPE (cx) == CXt_FORMAT))
367	{	512	{
368	CV *cv = cx->blk_sub.cv;	513	CV *cv = cx->blk_sub.cv;
		514
369	if (CvDEPTH(cv))	515	if (expect_true (CvDEPTH (cv)))
370	{	516	{
371	EXTEND (SP, CvDEPTH(cv)*2);	517	EXTEND (SP, 3);
372
373	while (--CvDEPTH(cv))
374	{
375	/* this tells the restore code to increment CvDEPTH */
376	PUSHs (Nullsv);
377	PUSHs ((SV *)cv);
378	}
379
380	PUSHs ((SV *)CvPADLIST(cv));	518	PUSHs ((SV *)CvPADLIST (cv));
		519	PUSHs (INT2PTR (SV *, (IV)CvDEPTH (cv)));
381	PUSHs ((SV *)cv);	520	PUSHs ((SV *)cv);
382		521
		522	CvDEPTH (cv) = 0;
383	get_padlist (cv);	523	get_padlist (aTHX_ cv);
384	}	524	}
385	}	525	}
386	#ifdef CXt_FORMAT
387	else if (CxTYPE(cx) == CXt_FORMAT)
388	{
389	/* I never used formats, so how should I know how these are implemented? */
390	/* my bold guess is as a simple, plain sub... */
391	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
392	}
393	#endif
394	}	526	}
395		527
396	if (top_si->si_type == PERLSI_MAIN)	528	if (expect_true (top_si->si_type == PERLSI_MAIN))
397	break;	529	break;
398		530
399	top_si = top_si->si_prev;	531	top_si = top_si->si_prev;
400	ccstk = top_si->si_cxstack;	532	ccstk = top_si->si_cxstack;
401	cxix = top_si->si_cxix;	533	cxix = top_si->si_cxix;
402	}	534	}
403		535
404	PUTBACK;	536	PUTBACK;
405	}	537	}
406		538
407	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	539	/* allocate some space on the context stack for our purposes */
408	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	540	/* we manually unroll here, as usually 2 slots is enough */
409	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 */
410		550
411	c->dowarn = PL_dowarn;
412	c->in_eval = PL_in_eval;
413
414	c->curstackinfo = PL_curstackinfo;
415	c->curstack = PL_curstack;
416	c->mainstack = PL_mainstack;	551	c->mainstack = PL_mainstack;
417	c->stack_sp = PL_stack_sp;	552
418	c->op = PL_op;	553	{
419	c->curpad = PL_curpad;	554	perl_slots *slot = c->slot = (perl_slots *)(cxstack + cxstack_ix + 1);
420	c->comppad = PL_comppad;	555
421	c->compcv = PL_compcv;	556	slot->defav = GvAV (PL_defgv);
422	c->stack_base = PL_stack_base;	557	slot->defsv = DEFSV;
423	c->stack_max = PL_stack_max;	558	slot->errsv = ERRSV;
424	c->tmps_stack = PL_tmps_stack;	559	slot->irsgv = GvSV (irsgv);
425	c->tmps_floor = PL_tmps_floor;	560
426	c->tmps_ix = PL_tmps_ix;	561	#define VAR(name,type) slot->name = PL_ ## name;
427	c->tmps_max = PL_tmps_max;	562	# include "state.h"
428	c->markstack = PL_markstack;	563	#undef VAR
429	c->markstack_ptr = PL_markstack_ptr;	564	}
430	c->markstack_max = PL_markstack_max;
431	c->scopestack = PL_scopestack;
432	c->scopestack_ix = PL_scopestack_ix;
433	c->scopestack_max = PL_scopestack_max;
434	c->savestack = PL_savestack;
435	c->savestack_ix = PL_savestack_ix;
436	c->savestack_max = PL_savestack_max;
437	#if !PERL_VERSION_ATLEAST (5,9,0)
438	c->retstack = PL_retstack;
439	c->retstack_ix = PL_retstack_ix;
440	c->retstack_max = PL_retstack_max;
441	#endif
442	c->curpm = PL_curpm;
443	c->curcop = PL_curcop;
444	}	565	}
445		566
446	/*	567	/*
447	* allocate various perl stacks. This is an exact copy	568	* allocate various perl stacks. This is an exact copy
448	* of perl.c:init_stacks, except that it uses less memory	569	* of perl.c:init_stacks, except that it uses less memory
449	* on the (sometimes correct) assumption that coroutines do	570	* on the (sometimes correct) assumption that coroutines do
450	* not usually need a lot of stackspace.	571	* not usually need a lot of stackspace.
451	*/	572	*/
		573	#if CORO_PREFER_PERL_FUNCTIONS
		574	# define coro_init_stacks init_stacks
		575	#else
452	static void	576	static void
453	coro_init_stacks ()	577	coro_init_stacks (pTHX)
454	{	578	{
455	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	579	PL_curstackinfo = new_stackinfo(32, 8);
456	PL_curstackinfo->si_type = PERLSI_MAIN;	580	PL_curstackinfo->si_type = PERLSI_MAIN;
457	PL_curstack = PL_curstackinfo->si_stack;	581	PL_curstack = PL_curstackinfo->si_stack;
458	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	582	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
459		583
460	PL_stack_base = AvARRAY(PL_curstack);	584	PL_stack_base = AvARRAY(PL_curstack);
461	PL_stack_sp = PL_stack_base;	585	PL_stack_sp = PL_stack_base;
462	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	586	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
463		587
464	New(50,PL_tmps_stack,96,SV*);	588	New(50,PL_tmps_stack,32,SV*);
465	PL_tmps_floor = -1;	589	PL_tmps_floor = -1;
466	PL_tmps_ix = -1;	590	PL_tmps_ix = -1;
467	PL_tmps_max = 96;	591	PL_tmps_max = 32;
468		592
469	New(54,PL_markstack,16,I32);	593	New(54,PL_markstack,16,I32);
470	PL_markstack_ptr = PL_markstack;	594	PL_markstack_ptr = PL_markstack;
471	PL_markstack_max = PL_markstack + 16;	595	PL_markstack_max = PL_markstack + 16;
472		596
473	#ifdef SET_MARK_OFFSET	597	#ifdef SET_MARK_OFFSET
474	SET_MARK_OFFSET;	598	SET_MARK_OFFSET;
475	#endif	599	#endif
476		600
477	New(54,PL_scopestack,16,I32);	601	New(54,PL_scopestack,8,I32);
478	PL_scopestack_ix = 0;	602	PL_scopestack_ix = 0;
479	PL_scopestack_max = 16;	603	PL_scopestack_max = 8;
480		604
481	New(54,PL_savestack,96,ANY);	605	New(54,PL_savestack,24,ANY);
482	PL_savestack_ix = 0;	606	PL_savestack_ix = 0;
483	PL_savestack_max = 96;	607	PL_savestack_max = 24;
484		608
485	#if !PERL_VERSION_ATLEAST (5,9,0)	609	#if !PERL_VERSION_ATLEAST (5,10,0)
486	New(54,PL_retstack,8,OP*);	610	New(54,PL_retstack,4,OP*);
487	PL_retstack_ix = 0;	611	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	612	PL_retstack_max = 4;
489	#endif	613	#endif
490	}	614	}
		615	#endif
491		616
492	/*	617	/*
493	* destroy the stacks, the callchain etc...	618	* destroy the stacks, the callchain etc...
494	*/	619	*/
495	static void	620	static void
496	coro_destroy_stacks()	621	coro_destroy_stacks (pTHX)
497	{	622	{
498	if (!IN_DESTRUCT)
499	{
500	/* is this ugly, I ask? */
501	LEAVE_SCOPE (0);
502
503	/* sure it is, but more important: is it correct?? :/ */
504	FREETMPS;
505
506	/*POPSTACK_TO (PL_mainstack);*//*D*//*use*/
507	}
508
509	while (PL_curstackinfo->si_next)	623	while (PL_curstackinfo->si_next)
510	PL_curstackinfo = PL_curstackinfo->si_next;	624	PL_curstackinfo = PL_curstackinfo->si_next;
511		625
512	while (PL_curstackinfo)	626	while (PL_curstackinfo)
513	{	627	{
514	PERL_SI *p = PL_curstackinfo->si_prev;	628	PERL_SI *p = PL_curstackinfo->si_prev;
515		629
516	{ /*D*//*remove*/
517	dSP;
518	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
519	PUTBACK; /* possibly superfluous */
520	}
521
522	if (!IN_DESTRUCT)	630	if (!IN_DESTRUCT)
523	{
524	dounwind (-1);/*D*//*remove*/
525	SvREFCNT_dec (PL_curstackinfo->si_stack);	631	SvREFCNT_dec (PL_curstackinfo->si_stack);
526	}
527		632
528	Safefree (PL_curstackinfo->si_cxstack);	633	Safefree (PL_curstackinfo->si_cxstack);
529	Safefree (PL_curstackinfo);	634	Safefree (PL_curstackinfo);
530	PL_curstackinfo = p;	635	PL_curstackinfo = p;
531	}	636	}
532		637
533	Safefree (PL_tmps_stack);	638	Safefree (PL_tmps_stack);
534	Safefree (PL_markstack);	639	Safefree (PL_markstack);
535	Safefree (PL_scopestack);	640	Safefree (PL_scopestack);
536	Safefree (PL_savestack);	641	Safefree (PL_savestack);
537	#if !PERL_VERSION_ATLEAST (5,9,0)	642	#if !PERL_VERSION_ATLEAST (5,10,0)
538	Safefree (PL_retstack);	643	Safefree (PL_retstack);
539	#endif	644	#endif
540	}	645	}
541		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
542	static void	776	static void
543	setup_coro (struct coro *coro)	777	coro_setup (pTHX_ struct coro *coro)
544	{	778	{
545	/*	779	/*
546	* emulate part of the perl startup here.	780	* emulate part of the perl startup here.
547	*/	781	*/
548
549	coro_init_stacks ();	782	coro_init_stacks (aTHX);
550		783
		784	PL_runops = RUNOPS_DEFAULT;
		785	PL_curcop = &PL_compiling;
		786	PL_in_eval = EVAL_NULL;
551	PL_curcop = 0;	787	PL_comppad = 0;
552	PL_in_eval = 0;
553	PL_curpm = 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);
554		807
555	{	808	{
556	dSP;	809	dSP;
557	LOGOP myop;	810	LOGOP myop;
558		811
559	/* I have no idea why this is needed, but it is */
560	PUSHMARK (SP);
561
562	SvREFCNT_dec (GvAV (PL_defgv));
563	GvAV (PL_defgv) = coro->args; coro->args = 0;
564
565	Zero (&myop, 1, LOGOP);	812	Zero (&myop, 1, LOGOP);
566	myop.op_next = Nullop;	813	myop.op_next = Nullop;
567	myop.op_flags = OPf_WANT_VOID;	814	myop.op_flags = OPf_WANT_VOID;
568		815
		816	PUSHMARK (SP);
		817	XPUSHs (sv_2mortal (av_shift (GvAV (PL_defgv))));
		818	PUTBACK;
569	PL_op = (OP *)&myop;	819	PL_op = (OP *)&myop;
570
571	PUSHMARK (SP);
572	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
573	PUTBACK;
574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	820	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
575	SPAGAIN;	821	SPAGAIN;
576
577	ENTER; /* necessary e.g. for dounwind */
578	}	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;
579	}	830	}
580		831
581	static void	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
582	free_coro_mortal ()	869	free_coro_mortal (pTHX)
583	{	870	{
584	if (coro_mortal)	871	if (expect_true (coro_mortal))
585	{	872	{
586	SvREFCNT_dec (coro_mortal);	873	SvREFCNT_dec (coro_mortal);
587	coro_mortal = 0;	874	coro_mortal = 0;
588	}	875	}
589	}	876	}
590		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 */
591	static void NOINLINE	1005	static void NOINLINE
592	prepare_cctx (coro_stack *cctx)	1006	cctx_prepare (pTHX_ coro_cctx *cctx)
593	{	1007	{
594	dSP;	1008	dSP;
595	LOGOP myop;	1009	LOGOP myop;
596		1010
		1011	PL_top_env = &PL_start_env;
		1012
		1013	if (cctx->flags & CC_TRACE)
		1014	PL_runops = runops_trace;
		1015
597	Zero (&myop, 1, LOGOP);	1016	Zero (&myop, 1, LOGOP);
598	myop.op_next = PL_op;	1017	myop.op_next = PL_op;
599	myop.op_flags = OPf_WANT_VOID;	1018	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
600
601	sv_setiv (get_sv ("Coro::State::cctx_stack", FALSE), PTR2IV (cctx));
602		1019
603	PUSHMARK (SP);	1020	PUSHMARK (SP);
		1021	EXTEND (SP, 2);
		1022	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
604	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));	1023	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
605	PUTBACK;	1024	PUTBACK;
		1025	PL_op = (OP *)&myop;
606	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);	1026	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
607	SPAGAIN;	1027	SPAGAIN;
608	}	1028	}
609		1029
		1030	/*
		1031	* this is a _very_ stripped down perl interpreter ;)
		1032	*/
610	static void	1033	static void
611	coro_run (void *arg)	1034	cctx_run (void *arg)
612	{	1035	{
		1036	dTHX;
		1037
613	/* coro_run is the alternative epilogue of transfer() */	1038	/* cctx_run is the alternative tail of transfer(), so unlock here. */
614	UNLOCK;	1039	UNLOCK;
615		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
616	/*	1051	/*
617	* this is a _very_ stripped down perl interpreter ;)	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
618	*/	1057	*/
619	PL_top_env = &PL_start_env;	1058	PL_top_env = main_top_env;
620	/* inject call to cctx_init */	1059	JMPENV_JUMP (2); /* I do not feel well about the hardcoded 2 at all */
621	prepare_cctx ((coro_stack *)arg);
622
623	/* somebody will hit me for both perl_run and PL_restartop */
624	perl_run (PL_curinterp);
625
626	fputs ("FATAL: C coroutine fell over the edge of the world, aborting.\n", stderr);
627	abort ();
628	}	1060	}
629		1061
630	static coro_stack *	1062	static coro_cctx *
631	stack_new ()	1063	cctx_new ()
632	{	1064	{
633	coro_stack *stack;	1065	coro_cctx *cctx;
		1066	void *stack_start;
		1067	size_t stack_size;
634		1068
		1069	++cctx_count;
		1070
635	New (0, stack, 1, coro_stack);	1071	Newz (0, cctx, 1, coro_cctx);
636		1072
637	#if HAVE_MMAP	1073	#if HAVE_MMAP
638
639	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;	1074	cctx->ssize = ((coro_stacksize * sizeof (long) + PAGESIZE - 1) / PAGESIZE + CORO_STACKGUARD) * PAGESIZE;
640	/* mmap suppsedly does allocate-on-write for us */	1075	/* mmap supposedly does allocate-on-write for us */
641	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);	1076	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
642		1077
643	if (stack->sptr == (void *)-1)	1078	if (cctx->sptr != (void *)-1)
644	{
645	perror ("FATAL: unable to mmap stack for coroutine");
646	_exit (EXIT_FAILURE);
647	}	1079	{
648
649	# if STACKGUARD	1080	# if CORO_STACKGUARD
650	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);	1081	mprotect (cctx->sptr, CORO_STACKGUARD * PAGESIZE, PROT_NONE);
651	# endif	1082	# endif
652		1083	stack_start = CORO_STACKGUARD * PAGESIZE + (char *)cctx->sptr;
653	#else	1084	stack_size = cctx->ssize - CORO_STACKGUARD * PAGESIZE;
654		1085	cctx->flags |= CC_MAPPED;
655	stack->ssize = STACKSIZE * (long)sizeof (long);
656	New (0, stack->sptr, STACKSIZE, long);
657
658	if (!stack->sptr)
659	{	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	{
660	perror (stderr, "FATAL: unable to malloc stack for coroutine");	1095	perror ("FATAL: unable to allocate stack for coroutine");
661	_exit (EXIT_FAILURE);	1096	_exit (EXIT_FAILURE);
662	}	1097	}
663		1098
664	#endif	1099	stack_start = cctx->sptr;
		1100	stack_size = cctx->ssize;
		1101	}
665		1102
666	coro_create (&stack->cctx, coro_run, (void *)stack, stack->sptr, stack->ssize);	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);
667		1105
668	return stack;	1106	return cctx;
669	}	1107	}
670		1108
671	static void	1109	static void
672	stack_free (coro_stack *stack)	1110	cctx_destroy (coro_cctx *cctx)
673	{	1111	{
674	if (!stack)	1112	if (!cctx)
675	return;	1113	return;
676		1114
		1115	--cctx_count;
		1116
		1117	#if CORO_USE_VALGRIND
		1118	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		1119	#endif
		1120
677	#if HAVE_MMAP	1121	#if HAVE_MMAP
		1122	if (cctx->flags & CC_MAPPED)
678	munmap (stack->sptr, stack->ssize);	1123	munmap (cctx->sptr, cctx->ssize);
679	#else	1124	else
		1125	#endif
680	Safefree (stack->sptr);	1126	Safefree (cctx->sptr);
681	#endif
682		1127
683	Safefree (stack);	1128	Safefree (cctx);
684	}	1129	}
685		1130
686	static coro_stack *stack_first;	1131	/* wether this cctx should be destructed */
687	static int cctx_count, cctx_idle;	1132	#define CCTX_EXPIRED(cctx) ((cctx)->ssize < coro_stacksize || ((cctx)->flags & CC_NOREUSE))
688		1133
689	static coro_stack *	1134	static coro_cctx *
690	stack_get ()	1135	cctx_get (pTHX)
691	{	1136	{
692	coro_stack *stack;	1137	while (expect_true (cctx_first))
693
694	if (stack_first)
695	{	1138	{
		1139	coro_cctx *cctx = cctx_first;
		1140	cctx_first = cctx->next;
696	--cctx_idle;	1141	--cctx_idle;
697	stack = stack_first;	1142
698	stack_first = stack->next;	1143	if (expect_true (!CCTX_EXPIRED (cctx)))
699	}	1144	return cctx;
700	else	1145
701	{	1146	cctx_destroy (cctx);
702	++cctx_count;
703	stack = stack_new ();
704	PL_op = PL_op->op_next;
705	}	1147	}
706		1148
707	return stack;	1149	return cctx_new ();
708	}	1150	}
709		1151
710	static void	1152	static void
711	stack_put (coro_stack *stack)	1153	cctx_put (coro_cctx *cctx)
712	{	1154	{
		1155	/* free another cctx if overlimit */
		1156	if (expect_false (cctx_idle >= MAX_IDLE_CCTX))
		1157	{
		1158	coro_cctx *first = cctx_first;
		1159	cctx_first = first->next;
		1160	--cctx_idle;
		1161
		1162	cctx_destroy (first);
		1163	}
		1164
713	++cctx_idle;	1165	++cctx_idle;
714	stack->next = stack_first;	1166	cctx->next = cctx_first;
715	stack_first = stack;	1167	cctx_first = cctx;
716	}	1168	}
717		1169
718	/* never call directly, always through the coro_state_transfer global variable */	1170	/** coroutine switching *****************************************************/
		1171
		1172	static void
		1173	transfer_check (pTHX_ struct coro *prev, struct coro *next)
		1174	{
		1175	if (expect_true (prev != next))
		1176	{
		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");
		1179
		1180	if (expect_false (next->flags & CF_RUNNING))
		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 */
719	static void NOINLINE	1194	static void NOINLINE
720	transfer (struct coro *prev, struct coro *next, int flags)	1195	transfer (pTHX_ struct coro *prev, struct coro *next, int force_cctx)
721	{	1196	{
722	dSTACKLEVEL;	1197	dSTACKLEVEL;
		1198	static volatile int has_throw;
723		1199
724	/* sometimes transfer is only called to set idle_sp */	1200	/* sometimes transfer is only called to set idle_sp */
725	if (flags == TRANSFER_SET_STACKLEVEL)	1201	if (expect_false (!next))
		1202	{
726	((coro_stack *)prev)->idle_sp = STACKLEVEL;	1203	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
727	else if (prev != next)	1204	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
728	{	1205	}
		1206	else if (expect_true (prev != next))
		1207	{
729	coro_stack *prev__stack;	1208	coro_cctx *prev__cctx;
		1209
		1210	if (expect_false (prev->flags & CF_NEW))
		1211	{
		1212	/* create a new empty context */
		1213	Newz (0, prev->cctx, 1, coro_cctx);
		1214	prev->flags &= ~CF_NEW;
		1215	prev->flags |= CF_RUNNING;
		1216	}
		1217
		1218	prev->flags &= ~CF_RUNNING;
		1219	next->flags |= CF_RUNNING;
730		1220
731	LOCK;	1221	LOCK;
732		1222
733	if (next->mainstack)	1223	/* first get rid of the old state */
		1224	save_perl (aTHX_ prev);
		1225
		1226	if (expect_false (next->flags & CF_NEW))
734	{	1227	{
735	/* coroutine already started */	1228	/* need to start coroutine */
736	SAVE (prev, flags);	1229	next->flags &= ~CF_NEW;
737	LOAD (next);	1230	/* setup coroutine call */
		1231	coro_setup (aTHX_ next);
738	}	1232	}
739	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	))
740	{	1244	{
741	/* need to start coroutine */	1245	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
742	/* 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));
743	SAVE (prev, -1);	1247
744	/* setup coroutine call */	1248	prev->cctx = 0;
745	setup_coro (next);	1249
746	/* need a stack */	1250	/* if the cctx is about to be destroyed we need to make sure we won't see it in cctx_get */
747	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);
748	}	1257	}
749		1258
750	if (!prev->stack)	1259	++next->usecount;
751	/* create a new empty context */
752	Newz (0, prev->stack, 1, coro_stack);
753		1260
754	prev__stack = prev->stack;	1261	if (expect_true (!next->cctx))
		1262	next->cctx = cctx_get (aTHX);
755		1263
756	/* possibly "free" the stack */	1264	has_throw = !!next->throw;
757	if (prev__stack->idle_sp == STACKLEVEL)	1265
		1266	if (expect_false (prev__cctx != next->cctx))
758	{	1267	{
759	stack_put (prev__stack);	1268	prev__cctx->top_env = PL_top_env;
760	prev->stack = 0;	1269	PL_top_env = next->cctx->top_env;
		1270	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
761	}	1271	}
762		1272
763	if (!next->stack)	1273	free_coro_mortal (aTHX);
764	next->stack = stack_get ();	1274	UNLOCK;
765		1275
766	if (prev__stack != next->stack)	1276	if (expect_false (has_throw))
767	{	1277	{
768	prev__stack->top_env = PL_top_env;	1278	struct coro *coro = SvSTATE (coro_current);
769	PL_top_env = next->stack->top_env;	1279
770	coro_transfer (&prev__stack->cctx, &next->stack->cctx);	1280	if (coro->throw)
		1281	{
		1282	SV *exception = coro->throw;
		1283	coro->throw = 0;
		1284	sv_setsv (ERRSV, exception);
		1285	croak (0);
		1286	}
771	}	1287	}
		1288	}
		1289	}
772		1290
773	free_coro_mortal ();	1291	struct transfer_args
		1292	{
		1293	struct coro *prev, *next;
		1294	};
774		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
		1301	static int
		1302	coro_state_destroy (pTHX_ struct coro *coro)
		1303	{
		1304	if (coro->flags & CF_DESTROYED)
		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;
775	UNLOCK;	1315	UNLOCK;
776	}	1316	}
777	}	1317	else
778		1318	coro->flags |= CF_READY; /* make sure it is NOT put into the readyqueue */
779	struct transfer_args
780	{
781	struct coro *prev, *next;
782	int flags;
783	};
784
785	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
786
787	static void
788	coro_state_destroy (struct coro *coro)
789	{
790	if (coro->refcnt--)
791	return;
792		1319
793	if (coro->mainstack && coro->mainstack != main_mainstack)	1320	if (coro->mainstack && coro->mainstack != main_mainstack)
794	{	1321	{
795	struct coro temp;	1322	struct coro temp;
796		1323
797	SAVE ((&temp), TRANSFER_SAVE_ALL);	1324	if (coro->flags & CF_RUNNING)
798	LOAD (coro);	1325	croak ("FATAL: tried to destroy currently running coroutine");
799		1326
800	coro_destroy_stacks ();	1327	save_perl (aTHX_ &temp);
		1328	load_perl (aTHX_ coro);
801		1329
802	LOAD ((&temp)); /* this will get rid of defsv etc.. */	1330	coro_destroy (aTHX_ coro);
803		1331
		1332	load_perl (aTHX_ &temp);
		1333
804	coro->mainstack = 0;	1334	coro->slot = 0;
805	}	1335	}
806		1336
807	stack_free (coro->stack);	1337	cctx_destroy (coro->cctx);
808	SvREFCNT_dec (coro->args);	1338	SvREFCNT_dec (coro->args);
809	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;
810	}	1345	}
811		1346
812	static int	1347	static int
813	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)	1348	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
814	{	1349	{
815	struct coro *coro = (struct coro *)mg->mg_ptr;	1350	struct coro *coro = (struct coro *)mg->mg_ptr;
816	mg->mg_ptr = 0;	1351	mg->mg_ptr = 0;
817		1352
		1353	coro->hv = 0;
		1354
		1355	if (--coro->refcnt < 0)
		1356	{
818	coro_state_destroy (coro);	1357	coro_state_destroy (aTHX_ coro);
		1358	Safefree (coro);
		1359	}
819		1360
820	return 0;	1361	return 0;
821	}	1362	}
822		1363
823	static int	1364	static int
…		…
830	return 0;	1371	return 0;
831	}	1372	}
832		1373
833	static MGVTBL coro_state_vtbl = {	1374	static MGVTBL coro_state_vtbl = {
834	0, 0, 0, 0,	1375	0, 0, 0, 0,
835	coro_state_clear,	1376	coro_state_free,
836	0,	1377	0,
837	#ifdef MGf_DUP	1378	#ifdef MGf_DUP
838	coro_state_dup,	1379	coro_state_dup,
839	#else	1380	#else
840	# define MGf_DUP 0	1381	# define MGf_DUP 0
841	#endif	1382	#endif
842	};	1383	};
843		1384
844	static struct coro *
845	SvSTATE (SV *coro)
846	{
847	HV *stash;
848	MAGIC *mg;
849
850	if (SvROK (coro))
851	coro = SvRV (coro);
852
853	stash = SvSTASH (coro);
854	if (stash != coro_stash && stash != coro_state_stash)
855	{
856	/* very slow, but rare, check */
857	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
858	croak ("Coro::State object required");
859	}
860
861	mg = SvMAGIC (coro);
862	assert (mg->mg_type == PERL_MAGIC_ext);
863	return (struct coro *)mg->mg_ptr;
864	}
865
866	static void	1385	static void
867	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)	1386	prepare_transfer (pTHX_ struct transfer_args *ta, SV *prev_sv, SV *next_sv)
868	{	1387	{
869	ta->prev = SvSTATE (prev);	1388	ta->prev = SvSTATE (prev_sv);
870	ta->next = SvSTATE (next);	1389	ta->next = SvSTATE (next_sv);
871	ta->flags = flags;	1390	TRANSFER_CHECK (*ta);
872	}	1391	}
873		1392
874	static void	1393	static void
875	api_transfer (SV *prev, SV *next, int flags)	1394	api_transfer (SV *prev_sv, SV *next_sv)
876	{	1395	{
877	dTHX;	1396	dTHX;
878	struct transfer_args ta;	1397	struct transfer_args ta;
879		1398
880	prepare_transfer (&ta, prev, next, flags);	1399	prepare_transfer (aTHX_ &ta, prev_sv, next_sv);
881	TRANSFER (ta);	1400	TRANSFER (ta, 1);
882	}	1401	}
883		1402
884	/** Coro ********************************************************************/	1403	/** Coro ********************************************************************/
885		1404
886	#define PRIO_MAX 3
887	#define PRIO_HIGH 1
888	#define PRIO_NORMAL 0
889	#define PRIO_LOW -1
890	#define PRIO_IDLE -3
891	#define PRIO_MIN -4
892
893	/* for Coro.pm */
894	static GV *coro_current, *coro_idle;
895	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
896	static int coro_nready;
897
898	static void	1405	static void
899	coro_enq (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)
900	{	1413	{
901	int prio;	1414	int prio;
902		1415
903	if (SvTYPE (sv) != SVt_PVHV)
904	croak ("Coro::ready tried to enqueue something that is not a coroutine");
905
906	prio = SvSTATE (sv)->prio;
907
908	av_push (coro_ready [prio - PRIO_MIN], sv);
909	coro_nready++;
910	}
911
912	static SV *
913	coro_deq (int min_prio)
914	{
915	int prio = PRIO_MAX - PRIO_MIN;
916
917	min_prio -= PRIO_MIN;
918	if (min_prio < 0)
919	min_prio = 0;
920
921	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	1416	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= 0; )
922	if (AvFILLp (coro_ready [prio]) >= 0)	1417	if (AvFILLp (coro_ready [prio]) >= 0)
923	{
924	coro_nready--;
925	return av_shift (coro_ready [prio]);	1418	return av_shift (coro_ready [prio]);
926	}
927		1419
928	return 0;	1420	return 0;
929	}	1421	}
930		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
931	static void	1480	static void
932	api_ready (SV *coro)	1481	prepare_schedule (pTHX_ struct transfer_args *ta)
933	{	1482	{
934	dTHX;	1483	SV *prev_sv, *next_sv;
935		1484
936	if (SvROK (coro))	1485	for (;;)
937	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);
938		1532
939	LOCK;	1533	LOCK;
940	coro_enq (SvREFCNT_inc (coro));	1534	free_coro_mortal (aTHX);
		1535	coro_mortal = prev_sv;
941	UNLOCK;	1536	UNLOCK;
942	}	1537	}
943		1538
944	static void	1539	static void
945	prepare_schedule (struct transfer_args *ta)
946	{
947	SV *current, *prev, *next;
948
949	current = GvSV (coro_current);
950
951	for (;;)
952	{
953	LOCK;
954	next = coro_deq (PRIO_MIN);
955	UNLOCK;
956
957	if (next)
958	break;
959
960	{
961	dSP;
962
963	ENTER;
964	SAVETMPS;
965
966	PUSHMARK (SP);
967	PUTBACK;
968	call_sv (GvSV (coro_idle), G_DISCARD);
969
970	FREETMPS;
971	LEAVE;
972	}
973	}
974
975	prev = SvRV (current);
976	SvRV (current) = next;
977
978	/* free this only after the transfer */
979	LOCK;
980	free_coro_mortal ();
981	UNLOCK;
982	coro_mortal = prev;
983
984	ta->prev = SvSTATE (prev);
985	ta->next = SvSTATE (next);
986	ta->flags = TRANSFER_SAVE_ALL;
987	}
988
989	static void
990	prepare_cede (struct transfer_args *ta)	1540	prepare_cede (pTHX_ struct transfer_args *ta)
991	{	1541	{
992	LOCK;	1542	api_ready (coro_current);
993	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
994	UNLOCK;
995
996	prepare_schedule (ta);	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;
997	}	1558	}
998		1559
999	static void	1560	static void
1000	api_schedule (void)	1561	api_schedule (void)
1001	{	1562	{
1002	dTHX;	1563	dTHX;
1003	struct transfer_args ta;	1564	struct transfer_args ta;
1004		1565
1005	prepare_schedule (&ta);	1566	prepare_schedule (aTHX_ &ta);
1006	TRANSFER (ta);	1567	TRANSFER (ta, 1);
1007	}	1568	}
1008		1569
1009	static void	1570	static int
1010	api_cede (void)	1571	api_cede (void)
1011	{	1572	{
1012	dTHX;	1573	dTHX;
1013	struct transfer_args ta;	1574	struct transfer_args ta;
1014		1575
1015	prepare_cede (&ta);	1576	prepare_cede (aTHX_ &ta);
		1577
		1578	if (expect_true (ta.prev != ta.next))
		1579	{
1016	TRANSFER (ta);	1580	TRANSFER (ta, 1);
		1581	return 1;
		1582	}
		1583	else
		1584	return 0;
1017	}	1585	}
1018		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))
		1594	{
		1595	TRANSFER (ta, 1);
		1596	return 1;
		1597	}
		1598	else
		1599	return 0;
		1600	}
		1601
		1602	static void
		1603	api_trace (SV *coro_sv, int flags)
		1604	{
		1605	dTHX;
		1606	struct coro *coro = SvSTATE (coro_sv);
		1607
		1608	if (flags & CC_TRACE)
		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;
		1623	else
		1624	coro->slot->runops = RUNOPS_DEFAULT;
		1625	}
		1626	}
		1627
1019	MODULE = Coro::State PACKAGE = Coro::State	1628	MODULE = Coro::State PACKAGE = Coro::State PREFIX = api_
1020		1629
1021	PROTOTYPES: DISABLE	1630	PROTOTYPES: DISABLE
1022		1631
1023	BOOT:	1632	BOOT:
1024	{	1633	{
1025	#ifdef USE_ITHREADS	1634	#ifdef USE_ITHREADS
1026	MUTEX_INIT (&coro_mutex);	1635	MUTEX_INIT (&coro_mutex);
1027	#endif	1636	#endif
1028	BOOT_PAGESIZE;	1637	BOOT_PAGESIZE;
1029		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
1030	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1650	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
1031		1651
1032	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1652	newCONSTSUB (coro_state_stash, "CC_TRACE" , newSViv (CC_TRACE));
1033	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1653	newCONSTSUB (coro_state_stash, "CC_TRACE_SUB" , newSViv (CC_TRACE_SUB));
1034	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));
1035		1656
1036	main_mainstack = PL_mainstack;	1657	main_mainstack = PL_mainstack;
		1658	main_top_env = PL_top_env;
1037		1659
		1660	while (main_top_env->je_prev)
		1661	main_top_env = main_top_env->je_prev;
		1662
1038	coroapi.ver = CORO_API_VERSION;	1663	coroapi.ver = CORO_API_VERSION;
		1664	coroapi.rev = CORO_API_REVISION;
1039	coroapi.transfer = api_transfer;	1665	coroapi.transfer = api_transfer;
1040		1666
1041	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));	1667	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
1042	}	1668	}
1043		1669
1044	SV *	1670	SV *
1045	new (char *klass, ...)	1671	new (char *klass, ...)
1046	CODE:	1672	CODE:
1047	{	1673	{
1048	struct coro *coro;	1674	struct coro *coro;
		1675	MAGIC *mg;
1049	HV *hv;	1676	HV *hv;
1050	int i;	1677	int i;
1051		1678
1052	Newz (0, coro, 1, struct coro);	1679	Newz (0, coro, 1, struct coro);
1053	coro->args = newAV ();	1680	coro->args = newAV ();
		1681	coro->flags = CF_NEW;
1054		1682
		1683	if (coro_first) coro_first->prev = coro;
		1684	coro->next = coro_first;
		1685	coro_first = coro;
		1686
1055	hv = newHV ();	1687	coro->hv = hv = newHV ();
1056	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;
1057	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));	1690	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
1058		1691
		1692	av_extend (coro->args, items - 1);
1059	for (i = 1; i < items; i++)	1693	for (i = 1; i < items; i++)
1060	av_push (coro->args, newSVsv (ST (i)));	1694	av_push (coro->args, newSVsv (ST (i)));
1061
1062	/*coro->mainstack = 0; *//*actual work is done inside transfer */
1063	/*coro->stack = 0;*/
1064	}	1695	}
1065	OUTPUT:	1696	OUTPUT:
1066	RETVAL	1697	RETVAL
1067		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
1068	void	1702	void
1069	_set_stacklevel (...)	1703	_set_stacklevel (...)
1070	ALIAS:	1704	ALIAS:
1071	Coro::State::transfer = 1	1705	Coro::State::transfer = 1
1072	Coro::schedule = 2	1706	Coro::schedule = 2
1073	Coro::cede = 3	1707	Coro::cede = 3
1074	Coro::Cont::yield = 4	1708	Coro::cede_notself = 4
1075	CODE:	1709	CODE:
1076	{	1710	{
1077	struct transfer_args ta;	1711	struct transfer_args ta;
1078		1712
		1713	PUTBACK;
1079	switch (ix)	1714	switch (ix)
1080	{	1715	{
1081	case 0:	1716	case 0:
1082	ta.prev = (struct coro *)INT2PTR (coro_stack *, SvIV (ST (0)));	1717	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
1083	ta.next = 0;	1718	ta.next = 0;
1084	ta.flags = TRANSFER_SET_STACKLEVEL;
1085	break;	1719	break;
1086		1720
1087	case 1:	1721	case 1:
1088	if (items != 3)	1722	if (items != 2)
1089	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);	1723	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
1090		1724
1091	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));	1725	prepare_transfer (aTHX_ &ta, ST (0), ST (1));
1092	break;	1726	break;
1093		1727
1094	case 2:	1728	case 2:
1095	prepare_schedule (&ta);	1729	prepare_schedule (aTHX_ &ta);
1096	break;	1730	break;
1097		1731
1098	case 3:	1732	case 3:
1099	prepare_cede (&ta);	1733	prepare_cede (aTHX_ &ta);
1100	break;	1734	break;
1101		1735
1102	case 4:	1736	case 4:
1103	{	1737	if (!prepare_cede_notself (aTHX_ &ta))
1104	SV *yieldstack;	1738	XSRETURN_EMPTY;
1105	SV *sv;
1106	AV *defav = GvAV (PL_defgv);
1107		1739
1108	yieldstack = *hv_fetch (
1109	(HV *)SvRV (GvSV (coro_current)),
1110	"yieldstack", sizeof ("yieldstack") - 1,
1111	0
1112	);
1113
1114	/* set up @_ -- ugly */
1115	av_clear (defav);
1116	av_fill (defav, items - 1);
1117	while (items--)
1118	av_store (defav, items, SvREFCNT_inc (ST(items)));
1119
1120	sv = av_pop ((AV *)SvRV (yieldstack));
1121	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
1122	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
1123	ta.flags = 0;
1124	SvREFCNT_dec (sv);
1125	}
1126	break;	1740	break;
1127
1128	}	1741	}
		1742	SPAGAIN;
1129		1743
		1744	BARRIER;
		1745	PUTBACK;
1130	TRANSFER (ta);	1746	TRANSFER (ta, 0);
		1747	SPAGAIN; /* might be the sp of a different coroutine now */
		1748	/* be extra careful not to ever do anything after TRANSFER */
1131	}	1749	}
		1750
		1751	bool
		1752	_destroy (SV *coro_sv)
		1753	CODE:
		1754	RETVAL = coro_state_destroy (aTHX_ SvSTATE (coro_sv));
		1755	OUTPUT:
		1756	RETVAL
1132		1757
1133	void	1758	void
1134	_clone_state_from (SV *dst, SV *src)
1135	CODE:
1136	{
1137	struct coro *coro_src = SvSTATE (src);
1138
1139	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
1140
1141	++coro_src->refcnt;
1142	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
1143	}
1144
1145	void
1146	_exit (code)	1759	_exit (int code)
1147	int code
1148	PROTOTYPE: $	1760	PROTOTYPE: $
1149	CODE:	1761	CODE:
1150	_exit (code);	1762	_exit (code);
1151		1763
		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
		1786
		1787	void
		1788	list ()
		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
		1880	CODE:
		1881	switch (ix)
		1882	{
		1883	case 0: RETVAL = coro_rss (aTHX_ coro); break;
		1884	case 1: RETVAL = coro->usecount; break;
		1885	}
		1886	OUTPUT:
		1887	RETVAL
		1888
		1889	void
		1890	force_cctx ()
		1891	CODE:
		1892	struct coro *coro = SvSTATE (coro_current);
		1893	coro->cctx->idle_sp = 0;
		1894
1152	MODULE = Coro::State PACKAGE = Coro	1895	MODULE = Coro::State PACKAGE = Coro
1153		1896
1154	BOOT:	1897	BOOT:
1155	{	1898	{
1156	int i;	1899	int i;
1157		1900
		1901	av_async_pool = coro_get_av (aTHX_ "Coro::async_pool", TRUE);
		1902	sv_pool_rss = coro_get_sv (aTHX_ "Coro::POOL_RSS" , TRUE);
		1903	sv_pool_size = coro_get_sv (aTHX_ "Coro::POOL_SIZE" , TRUE);
		1904
		1905	coro_current = coro_get_sv (aTHX_ "Coro::current", FALSE);
		1906	SvREADONLY_on (coro_current);
		1907
1158	coro_stash = gv_stashpv ("Coro", TRUE);	1908	coro_stash = gv_stashpv ("Coro", TRUE);
1159		1909
1160	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));	1910	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1161	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1911	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1162	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1912	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1163	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));	1913	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1164	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1914	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1165	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));	1915	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1166		1916
1167	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1168	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1169
1170	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1917	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1171	coro_ready[i] = newAV ();	1918	coro_ready[i] = newAV ();
1172		1919
1173	{	1920	{
1174	SV *sv = perl_get_sv("Coro::API", 1);	1921	SV *sv = perl_get_sv ("Coro::API", TRUE);
		1922	perl_get_sv ("Coro::API", TRUE); /* silence 5.10 warning */
1175		1923
1176	coroapi.schedule = api_schedule;	1924	coroapi.schedule = api_schedule;
1177	coroapi.cede = api_cede;	1925	coroapi.cede = api_cede;
		1926	coroapi.cede_notself = api_cede_notself;
1178	coroapi.ready = api_ready;	1927	coroapi.ready = api_ready;
		1928	coroapi.is_ready = api_is_ready;
1179	coroapi.nready = &coro_nready;	1929	coroapi.nready = &coro_nready;
1180	coroapi.current = coro_current;	1930	coroapi.current = coro_current;
1181		1931
1182	GCoroAPI = &coroapi;	1932	GCoroAPI = &coroapi;
1183	sv_setiv (sv, (IV)&coroapi);	1933	sv_setiv (sv, (IV)&coroapi);
1184	SvREADONLY_on (sv);	1934	SvREADONLY_on (sv);
1185	}	1935	}
1186	}	1936	}
		1937
		1938	void
		1939	_set_current (SV *current)
		1940	PROTOTYPE: $
		1941	CODE:
		1942	SvREFCNT_dec (SvRV (coro_current));
		1943	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
		1944
		1945	void
		1946	_set_readyhook (SV *hook)
		1947	PROTOTYPE: $
		1948	CODE:
		1949	LOCK;
		1950	SvREFCNT_dec (coro_readyhook);
		1951	coro_readyhook = SvOK (hook) ? newSVsv (hook) : 0;
		1952	UNLOCK;
1187		1953
1188	int	1954	int
1189	prio (Coro::State coro, int newprio = 0)	1955	prio (Coro::State coro, int newprio = 0)
1190	ALIAS:	1956	ALIAS:
1191	nice = 1	1957	nice = 1
…		…
1194	RETVAL = coro->prio;	1960	RETVAL = coro->prio;
1195		1961
1196	if (items > 1)	1962	if (items > 1)
1197	{	1963	{
1198	if (ix)	1964	if (ix)
1199	newprio += coro->prio;	1965	newprio = coro->prio - newprio;
1200		1966
1201	if (newprio < PRIO_MIN) newprio = PRIO_MIN;	1967	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
1202	if (newprio > PRIO_MAX) newprio = PRIO_MAX;	1968	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
1203		1969
1204	coro->prio = newprio;	1970	coro->prio = newprio;
1205	}	1971	}
1206	}	1972	}
		1973	OUTPUT:
		1974	RETVAL
1207		1975
1208	void	1976	SV *
1209	ready (SV *self)	1977	ready (SV *self)
1210	PROTOTYPE: $	1978	PROTOTYPE: $
1211	CODE:	1979	CODE:
1212	api_ready (self);	1980	RETVAL = boolSV (api_ready (self));
		1981	OUTPUT:
		1982	RETVAL
1213		1983
1214	int	1984	int
1215	nready (...)	1985	nready (...)
1216	PROTOTYPE:	1986	PROTOTYPE:
1217	CODE:	1987	CODE:
1218	RETVAL = coro_nready;	1988	RETVAL = coro_nready;
1219	OUTPUT:	1989	OUTPUT:
1220	RETVAL	1990	RETVAL
1221		1991
		1992	void
		1993	throw (Coro::State self, SV *throw = &PL_sv_undef)
		1994	PROTOTYPE: $;$
		1995	CODE:
		1996	SvREFCNT_dec (self->throw);
		1997	self->throw = SvOK (throw) ? newSVsv (throw) : 0;
		1998
		1999	void
		2000	swap_defsv (Coro::State self)
		2001	PROTOTYPE: $
		2002	ALIAS:
		2003	swap_defav = 1
		2004	CODE:
		2005	if (!self->slot)
		2006	croak ("cannot swap state with coroutine that has no saved state");
		2007	else
		2008	{
		2009	SV **src = ix ? (SV **)&GvAV (PL_defgv) : &GvSV (PL_defgv);
		2010	SV **dst = ix ? (SV **)&self->slot->defav : (SV **)&self->slot->defsv;
		2011
		2012	SV *tmp = *src; *src = *dst; *dst = tmp;
		2013	}
		2014
		2015	# for async_pool speedup
		2016	void
		2017	_pool_1 (SV *cb)
		2018	CODE:
		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	}
		2055
		2056	void
		2057	_pool_2 (SV *cb)
		2058	CODE:
		2059	{
		2060	struct coro *coro = SvSTATE (coro_current);
		2061
		2062	sv_setsv (cb, &PL_sv_undef);
		2063
		2064	SvREFCNT_dec ((SV *)PL_defoutgv); PL_defoutgv = (GV *)coro->saved_deffh;
		2065	coro->saved_deffh = 0;
		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
		2088
1222	MODULE = Coro::State PACKAGE = Coro::AIO	2089	MODULE = Coro::State PACKAGE = Coro::AIO
1223		2090
1224	SV *	2091	SV *
1225	_get_state ()	2092	_get_state ()
1226	CODE:	2093	CODE:
1227	{	2094	{
1228	struct {	2095	struct io_state *data;
1229	int errorno;
1230	int laststype;
1231	int laststatval;
1232	Stat_t statcache;
1233	} data;
1234		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
1235	data.errorno = errno;	2102	data->errorno = errno;
1236	data.laststype = PL_laststype;	2103	data->laststype = PL_laststype;
1237	data.laststatval = PL_laststatval;	2104	data->laststatval = PL_laststatval;
1238	data.statcache = PL_statcache;	2105	data->statcache = PL_statcache;
1239
1240	RETVAL = newSVpvn ((char *)&data, sizeof data);
1241	}	2106	}
1242	OUTPUT:	2107	OUTPUT:
1243	RETVAL	2108	RETVAL
1244		2109
1245	void	2110	void
1246	_set_state (char *data_)	2111	_set_state (char *data_)
1247	PROTOTYPE: $	2112	PROTOTYPE: $
1248	CODE:	2113	CODE:
1249	{	2114	{
1250	struct {	2115	struct io_state *data = (void *)data_;
1251	int errorno;
1252	int laststype;
1253	int laststatval;
1254	Stat_t statcache;
1255	} *data = (void *)data_;
1256		2116
1257	errno = data->errorno;	2117	errno = data->errorno;
1258	PL_laststype = data->laststype;	2118	PL_laststype = data->laststype;
1259	PL_laststatval = data->laststatval;	2119	PL_laststatval = data->laststatval;
1260	PL_statcache = data->statcache;	2120	PL_statcache = data->statcache;
1261	}	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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